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freebsd-nq/contrib/gcc/stmt.c

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Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Expands front end tree to back end RTL for GNU C-Compiler
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997,
1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
This file is part of GCC.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
You should have received a copy of the GNU General Public License
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* This file handles the generation of rtl code from tree structure
above the level of expressions, using subroutines in exp*.c and emit-rtl.c.
It also creates the rtl expressions for parameters and auto variables
and has full responsibility for allocating stack slots.
The functions whose names start with `expand_' are called by the
parser to generate RTL instructions for various kinds of constructs.
Some control and binding constructs require calling several such
functions at different times. For example, a simple if-then
is expanded by calling `expand_start_cond' (with the condition-expression
as argument) before parsing the then-clause and calling `expand_end_cond'
after parsing the then-clause. */
#include "config.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "system.h"
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "rtl.h"
#include "tree.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#include "tm_p.h"
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "flags.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "except.h"
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "function.h"
#include "insn-config.h"
#include "expr.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#include "libfuncs.h"
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "hard-reg-set.h"
#include "obstack.h"
#include "loop.h"
#include "recog.h"
#include "machmode.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "toplev.h"
#include "output.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#include "ggc.h"
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free
struct obstack stmt_obstack;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Assume that case vectors are not pc-relative. */
#ifndef CASE_VECTOR_PC_RELATIVE
#define CASE_VECTOR_PC_RELATIVE 0
#endif
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Functions and data structures for expanding case statements. */
/* Case label structure, used to hold info on labels within case
statements. We handle "range" labels; for a single-value label
as in C, the high and low limits are the same.
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
An AVL tree of case nodes is initially created, and later transformed
to a list linked via the RIGHT fields in the nodes. Nodes with
higher case values are later in the list.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Switch statements can be output in one of two forms. A branch table
is used if there are more than a few labels and the labels are dense
within the range between the smallest and largest case value. If a
branch table is used, no further manipulations are done with the case
node chain.
The alternative to the use of a branch table is to generate a series
of compare and jump insns. When that is done, we use the LEFT, RIGHT,
and PARENT fields to hold a binary tree. Initially the tree is
totally unbalanced, with everything on the right. We balance the tree
with nodes on the left having lower case values than the parent
and nodes on the right having higher values. We then output the tree
in order. */
struct case_node
{
struct case_node *left; /* Left son in binary tree */
struct case_node *right; /* Right son in binary tree; also node chain */
struct case_node *parent; /* Parent of node in binary tree */
tree low; /* Lowest index value for this label */
tree high; /* Highest index value for this label */
tree code_label; /* Label to jump to when node matches */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
int balance;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
};
typedef struct case_node case_node;
typedef struct case_node *case_node_ptr;
/* These are used by estimate_case_costs and balance_case_nodes. */
/* This must be a signed type, and non-ANSI compilers lack signed char. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static short cost_table_[129];
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
static int use_cost_table;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static int cost_table_initialized;
/* Special care is needed because we allow -1, but TREE_INT_CST_LOW
is unsigned. */
#define COST_TABLE(I) cost_table_[(unsigned HOST_WIDE_INT) ((I) + 1)]
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Stack of control and binding constructs we are currently inside.
These constructs begin when you call `expand_start_WHATEVER'
and end when you call `expand_end_WHATEVER'. This stack records
info about how the construct began that tells the end-function
what to do. It also may provide information about the construct
to alter the behavior of other constructs within the body.
For example, they may affect the behavior of C `break' and `continue'.
Each construct gets one `struct nesting' object.
All of these objects are chained through the `all' field.
`nesting_stack' points to the first object (innermost construct).
The position of an entry on `nesting_stack' is in its `depth' field.
Each type of construct has its own individual stack.
For example, loops have `loop_stack'. Each object points to the
next object of the same type through the `next' field.
Some constructs are visible to `break' exit-statements and others
are not. Which constructs are visible depends on the language.
Therefore, the data structure allows each construct to be visible
or not, according to the args given when the construct is started.
The construct is visible if the `exit_label' field is non-null.
In that case, the value should be a CODE_LABEL rtx. */
struct nesting
{
struct nesting *all;
struct nesting *next;
int depth;
rtx exit_label;
union
{
/* For conds (if-then and if-then-else statements). */
struct
{
/* Label for the end of the if construct.
There is none if EXITFLAG was not set
and no `else' has been seen yet. */
rtx endif_label;
/* Label for the end of this alternative.
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
This may be the end of the if or the next else/elseif. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx next_label;
} cond;
/* For loops. */
struct
{
/* Label at the top of the loop; place to loop back to. */
rtx start_label;
/* Label at the end of the whole construct. */
rtx end_label;
/* Label before a jump that branches to the end of the whole
construct. This is where destructors go if any. */
rtx alt_end_label;
/* Label for `continue' statement to jump to;
this is in front of the stepper of the loop. */
rtx continue_label;
} loop;
/* For variable binding contours. */
struct
{
/* Sequence number of this binding contour within the function,
in order of entry. */
int block_start_count;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Nonzero => value to restore stack to on exit. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx stack_level;
/* The NOTE that starts this contour.
Used by expand_goto to check whether the destination
is within each contour or not. */
rtx first_insn;
/* Innermost containing binding contour that has a stack level. */
struct nesting *innermost_stack_block;
/* List of cleanups to be run on exit from this contour.
This is a list of expressions to be evaluated.
The TREE_PURPOSE of each link is the ..._DECL node
which the cleanup pertains to. */
tree cleanups;
/* List of cleanup-lists of blocks containing this block,
as they were at the locus where this block appears.
There is an element for each containing block,
ordered innermost containing block first.
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
The tail of this list can be 0,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if all remaining elements would be empty lists.
The element's TREE_VALUE is the cleanup-list of that block,
which may be null. */
tree outer_cleanups;
/* Chain of labels defined inside this binding contour.
For contours that have stack levels or cleanups. */
struct label_chain *label_chain;
/* Number of function calls seen, as of start of this block. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int n_function_calls;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Nonzero if this is associated with a EH region. */
int exception_region;
/* The saved target_temp_slot_level from our outer block.
We may reset target_temp_slot_level to be the level of
this block, if that is done, target_temp_slot_level
reverts to the saved target_temp_slot_level at the very
end of the block. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int block_target_temp_slot_level;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* True if we are currently emitting insns in an area of
output code that is controlled by a conditional
expression. This is used by the cleanup handling code to
generate conditional cleanup actions. */
int conditional_code;
/* A place to move the start of the exception region for any
of the conditional cleanups, must be at the end or after
the start of the last unconditional cleanup, and before any
conditional branch points. */
rtx last_unconditional_cleanup;
/* When in a conditional context, this is the specific
cleanup list associated with last_unconditional_cleanup,
where we place the conditionalized cleanups. */
tree *cleanup_ptr;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
} block;
/* For switch (C) or case (Pascal) statements,
and also for dummies (see `expand_start_case_dummy'). */
struct
{
/* The insn after which the case dispatch should finally
be emitted. Zero for a dummy. */
rtx start;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* A list of case labels; it is first built as an AVL tree.
During expand_end_case, this is converted to a list, and may be
rearranged into a nearly balanced binary tree. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
struct case_node *case_list;
/* Label to jump to if no case matches. */
tree default_label;
/* The expression to be dispatched on. */
tree index_expr;
/* Type that INDEX_EXPR should be converted to. */
tree nominal_type;
/* Name of this kind of statement, for warnings. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
const char *printname;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Used to save no_line_numbers till we see the first case label.
We set this to -1 when we see the first case label in this
case statement. */
int line_number_status;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
} case_stmt;
} data;
};
/* Allocate and return a new `struct nesting'. */
#define ALLOC_NESTING() \
(struct nesting *) obstack_alloc (&stmt_obstack, sizeof (struct nesting))
/* Pop the nesting stack element by element until we pop off
the element which is at the top of STACK.
Update all the other stacks, popping off elements from them
as we pop them from nesting_stack. */
#define POPSTACK(STACK) \
do { struct nesting *target = STACK; \
struct nesting *this; \
do { this = nesting_stack; \
if (loop_stack == this) \
loop_stack = loop_stack->next; \
if (cond_stack == this) \
cond_stack = cond_stack->next; \
if (block_stack == this) \
block_stack = block_stack->next; \
if (stack_block_stack == this) \
stack_block_stack = stack_block_stack->next; \
if (case_stack == this) \
case_stack = case_stack->next; \
nesting_depth = nesting_stack->depth - 1; \
nesting_stack = this->all; \
obstack_free (&stmt_obstack, this); } \
while (this != target); } while (0)
/* In some cases it is impossible to generate code for a forward goto
until the label definition is seen. This happens when it may be necessary
for the goto to reset the stack pointer: we don't yet know how to do that.
So expand_goto puts an entry on this fixup list.
Each time a binding contour that resets the stack is exited,
we check each fixup.
If the target label has now been defined, we can insert the proper code. */
struct goto_fixup
{
/* Points to following fixup. */
struct goto_fixup *next;
/* Points to the insn before the jump insn.
If more code must be inserted, it goes after this insn. */
rtx before_jump;
/* The LABEL_DECL that this jump is jumping to, or 0
for break, continue or return. */
tree target;
/* The BLOCK for the place where this goto was found. */
tree context;
/* The CODE_LABEL rtx that this is jumping to. */
rtx target_rtl;
/* Number of binding contours started in current function
before the label reference. */
int block_start_count;
/* The outermost stack level that should be restored for this jump.
Each time a binding contour that resets the stack is exited,
if the target label is *not* yet defined, this slot is updated. */
rtx stack_level;
/* List of lists of cleanup expressions to be run by this goto.
There is one element for each block that this goto is within.
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
The tail of this list can be 0,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if all remaining elements would be empty.
The TREE_VALUE contains the cleanup list of that block as of the
time this goto was seen.
The TREE_ADDRESSABLE flag is 1 for a block that has been exited. */
tree cleanup_list_list;
};
/* Within any binding contour that must restore a stack level,
all labels are recorded with a chain of these structures. */
struct label_chain
{
/* Points to following fixup. */
struct label_chain *next;
tree label;
};
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct stmt_status
{
/* Chain of all pending binding contours. */
struct nesting *x_block_stack;
/* If any new stacks are added here, add them to POPSTACKS too. */
/* Chain of all pending binding contours that restore stack levels
or have cleanups. */
struct nesting *x_stack_block_stack;
/* Chain of all pending conditional statements. */
struct nesting *x_cond_stack;
/* Chain of all pending loops. */
struct nesting *x_loop_stack;
/* Chain of all pending case or switch statements. */
struct nesting *x_case_stack;
/* Separate chain including all of the above,
chained through the `all' field. */
struct nesting *x_nesting_stack;
/* Number of entries on nesting_stack now. */
int x_nesting_depth;
/* Number of binding contours started so far in this function. */
int x_block_start_count;
/* Each time we expand an expression-statement,
record the expr's type and its RTL value here. */
tree x_last_expr_type;
rtx x_last_expr_value;
/* Nonzero if within a ({...}) grouping, in which case we must
always compute a value for each expr-stmt in case it is the last one. */
int x_expr_stmts_for_value;
/* Filename and line number of last line-number note,
whether we actually emitted it or not. */
const char *x_emit_filename;
int x_emit_lineno;
struct goto_fixup *x_goto_fixup_chain;
};
#define block_stack (cfun->stmt->x_block_stack)
#define stack_block_stack (cfun->stmt->x_stack_block_stack)
#define cond_stack (cfun->stmt->x_cond_stack)
#define loop_stack (cfun->stmt->x_loop_stack)
#define case_stack (cfun->stmt->x_case_stack)
#define nesting_stack (cfun->stmt->x_nesting_stack)
#define nesting_depth (cfun->stmt->x_nesting_depth)
#define current_block_start_count (cfun->stmt->x_block_start_count)
#define last_expr_type (cfun->stmt->x_last_expr_type)
#define last_expr_value (cfun->stmt->x_last_expr_value)
#define expr_stmts_for_value (cfun->stmt->x_expr_stmts_for_value)
#define emit_filename (cfun->stmt->x_emit_filename)
#define emit_lineno (cfun->stmt->x_emit_lineno)
#define goto_fixup_chain (cfun->stmt->x_goto_fixup_chain)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Non-zero if we are using EH to handle cleanus. */
static int using_eh_for_cleanups_p = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static int n_occurrences PARAMS ((int, const char *));
static bool parse_input_constraint PARAMS ((const char **, int, int, int,
int, const char * const *,
bool *, bool *));
static void expand_goto_internal PARAMS ((tree, rtx, rtx));
static int expand_fixup PARAMS ((tree, rtx, rtx));
static rtx expand_nl_handler_label PARAMS ((rtx, rtx));
static void expand_nl_goto_receiver PARAMS ((void));
static void expand_nl_goto_receivers PARAMS ((struct nesting *));
static void fixup_gotos PARAMS ((struct nesting *, rtx, tree,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx, int));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static bool check_operand_nalternatives PARAMS ((tree, tree));
static bool check_unique_operand_names PARAMS ((tree, tree));
static tree resolve_operand_names PARAMS ((tree, tree, tree,
const char **));
static char *resolve_operand_name_1 PARAMS ((char *, tree, tree));
static void expand_null_return_1 PARAMS ((rtx));
static void expand_value_return PARAMS ((rtx));
static int tail_recursion_args PARAMS ((tree, tree));
static void expand_cleanups PARAMS ((tree, tree, int, int));
static void check_seenlabel PARAMS ((void));
static void do_jump_if_equal PARAMS ((rtx, rtx, rtx, int));
static int estimate_case_costs PARAMS ((case_node_ptr));
static void group_case_nodes PARAMS ((case_node_ptr));
static void balance_case_nodes PARAMS ((case_node_ptr *,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case_node_ptr));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static int node_has_low_bound PARAMS ((case_node_ptr, tree));
static int node_has_high_bound PARAMS ((case_node_ptr, tree));
static int node_is_bounded PARAMS ((case_node_ptr, tree));
static void emit_jump_if_reachable PARAMS ((rtx));
static void emit_case_nodes PARAMS ((rtx, case_node_ptr, rtx, tree));
static struct case_node *case_tree2list PARAMS ((case_node *, case_node *));
static void mark_cond_nesting PARAMS ((struct nesting *));
static void mark_loop_nesting PARAMS ((struct nesting *));
static void mark_block_nesting PARAMS ((struct nesting *));
static void mark_case_nesting PARAMS ((struct nesting *));
static void mark_case_node PARAMS ((struct case_node *));
static void mark_goto_fixup PARAMS ((struct goto_fixup *));
static void free_case_nodes PARAMS ((case_node_ptr));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
void
using_eh_for_cleanups ()
{
using_eh_for_cleanups_p = 1;
}
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2002-02-01 18:16:02 +00:00
/* Mark N (known to be a cond-nesting) for GC. */
static void
mark_cond_nesting (n)
struct nesting *n;
{
while (n)
{
ggc_mark_rtx (n->exit_label);
ggc_mark_rtx (n->data.cond.endif_label);
ggc_mark_rtx (n->data.cond.next_label);
n = n->next;
}
}
/* Mark N (known to be a loop-nesting) for GC. */
static void
mark_loop_nesting (n)
struct nesting *n;
{
while (n)
{
ggc_mark_rtx (n->exit_label);
ggc_mark_rtx (n->data.loop.start_label);
ggc_mark_rtx (n->data.loop.end_label);
ggc_mark_rtx (n->data.loop.alt_end_label);
ggc_mark_rtx (n->data.loop.continue_label);
n = n->next;
}
}
/* Mark N (known to be a block-nesting) for GC. */
static void
mark_block_nesting (n)
struct nesting *n;
{
while (n)
{
struct label_chain *l;
ggc_mark_rtx (n->exit_label);
ggc_mark_rtx (n->data.block.stack_level);
ggc_mark_rtx (n->data.block.first_insn);
ggc_mark_tree (n->data.block.cleanups);
ggc_mark_tree (n->data.block.outer_cleanups);
for (l = n->data.block.label_chain; l != NULL; l = l->next)
{
ggc_mark (l);
ggc_mark_tree (l->label);
}
ggc_mark_rtx (n->data.block.last_unconditional_cleanup);
/* ??? cleanup_ptr never points outside the stack, does it? */
n = n->next;
}
}
/* Mark N (known to be a case-nesting) for GC. */
static void
mark_case_nesting (n)
struct nesting *n;
{
while (n)
{
ggc_mark_rtx (n->exit_label);
ggc_mark_rtx (n->data.case_stmt.start);
ggc_mark_tree (n->data.case_stmt.default_label);
ggc_mark_tree (n->data.case_stmt.index_expr);
ggc_mark_tree (n->data.case_stmt.nominal_type);
mark_case_node (n->data.case_stmt.case_list);
n = n->next;
}
}
/* Mark C for GC. */
static void
mark_case_node (c)
struct case_node *c;
{
if (c != 0)
{
ggc_mark_tree (c->low);
ggc_mark_tree (c->high);
ggc_mark_tree (c->code_label);
mark_case_node (c->right);
mark_case_node (c->left);
}
}
/* Mark G for GC. */
static void
mark_goto_fixup (g)
struct goto_fixup *g;
{
while (g)
{
ggc_mark (g);
ggc_mark_rtx (g->before_jump);
ggc_mark_tree (g->target);
ggc_mark_tree (g->context);
ggc_mark_rtx (g->target_rtl);
ggc_mark_rtx (g->stack_level);
ggc_mark_tree (g->cleanup_list_list);
g = g->next;
}
}
/* Clear out all parts of the state in F that can safely be discarded
after the function has been compiled, to let garbage collection
reclaim the memory. */
void
free_stmt_status (f)
struct function *f;
{
/* We're about to free the function obstack. If we hold pointers to
things allocated there, then we'll try to mark them when we do
GC. So, we clear them out here explicitly. */
if (f->stmt)
free (f->stmt);
f->stmt = NULL;
}
/* Mark P for GC. */
void
mark_stmt_status (p)
struct stmt_status *p;
{
if (p == 0)
return;
mark_block_nesting (p->x_block_stack);
mark_cond_nesting (p->x_cond_stack);
mark_loop_nesting (p->x_loop_stack);
mark_case_nesting (p->x_case_stack);
ggc_mark_tree (p->x_last_expr_type);
/* last_epxr_value is only valid if last_expr_type is nonzero. */
if (p->x_last_expr_type)
ggc_mark_rtx (p->x_last_expr_value);
mark_goto_fixup (p->x_goto_fixup_chain);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
void
init_stmt ()
{
gcc_obstack_init (&stmt_obstack);
}
void
init_stmt_for_function ()
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
cfun->stmt = (struct stmt_status *) xmalloc (sizeof (struct stmt_status));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* We are not currently within any block, conditional, loop or case. */
block_stack = 0;
stack_block_stack = 0;
loop_stack = 0;
case_stack = 0;
cond_stack = 0;
nesting_stack = 0;
nesting_depth = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
current_block_start_count = 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* No gotos have been expanded yet. */
goto_fixup_chain = 0;
/* We are not processing a ({...}) grouping. */
expr_stmts_for_value = 0;
last_expr_type = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
last_expr_value = NULL_RTX;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Return nonzero if anything is pushed on the loop, condition, or case
stack. */
int
in_control_zone_p ()
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return cond_stack || loop_stack || case_stack;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Record the current file and line. Called from emit_line_note. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
void
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
set_file_and_line_for_stmt (file, line)
const char *file;
int line;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If we're outputting an inline function, and we add a line note,
there may be no CFUN->STMT information. So, there's no need to
update it. */
if (cfun->stmt)
{
emit_filename = file;
emit_lineno = line;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Emit a no-op instruction. */
void
emit_nop ()
{
rtx last_insn;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
last_insn = get_last_insn ();
if (!optimize
&& (GET_CODE (last_insn) == CODE_LABEL
|| (GET_CODE (last_insn) == NOTE
&& prev_real_insn (last_insn) == 0)))
emit_insn (gen_nop ());
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Return the rtx-label that corresponds to a LABEL_DECL,
creating it if necessary. */
rtx
label_rtx (label)
tree label;
{
if (TREE_CODE (label) != LABEL_DECL)
abort ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (!DECL_RTL_SET_P (label))
SET_DECL_RTL (label, gen_label_rtx ());
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return DECL_RTL (label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Add an unconditional jump to LABEL as the next sequential instruction. */
void
emit_jump (label)
rtx label;
{
do_pending_stack_adjust ();
emit_jump_insn (gen_jump (label));
emit_barrier ();
}
/* Emit code to jump to the address
specified by the pointer expression EXP. */
void
expand_computed_goto (exp)
tree exp;
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rtx x = expand_expr (exp, NULL_RTX, VOIDmode, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#ifdef POINTERS_EXTEND_UNSIGNED
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (GET_MODE (x) != Pmode)
x = convert_memory_address (Pmode, x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#endif
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
emit_queue ();
do_pending_stack_adjust ();
emit_indirect_jump (x);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
current_function_has_computed_jump = 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Handle goto statements and the labels that they can go to. */
/* Specify the location in the RTL code of a label LABEL,
which is a LABEL_DECL tree node.
This is used for the kind of label that the user can jump to with a
goto statement, and for alternatives of a switch or case statement.
RTL labels generated for loops and conditionals don't go through here;
they are generated directly at the RTL level, by other functions below.
Note that this has nothing to do with defining label *names*.
Languages vary in how they do that and what that even means. */
void
expand_label (label)
tree label;
{
struct label_chain *p;
do_pending_stack_adjust ();
emit_label (label_rtx (label));
if (DECL_NAME (label))
LABEL_NAME (DECL_RTL (label)) = IDENTIFIER_POINTER (DECL_NAME (label));
if (stack_block_stack != 0)
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
p = (struct label_chain *) ggc_alloc (sizeof (struct label_chain));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
p->next = stack_block_stack->data.block.label_chain;
stack_block_stack->data.block.label_chain = p;
p->label = label;
}
}
/* Declare that LABEL (a LABEL_DECL) may be used for nonlocal gotos
from nested functions. */
void
declare_nonlocal_label (label)
tree label;
{
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
rtx slot = assign_stack_local (Pmode, GET_MODE_SIZE (Pmode), 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
nonlocal_labels = tree_cons (NULL_TREE, label, nonlocal_labels);
LABEL_PRESERVE_P (label_rtx (label)) = 1;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (nonlocal_goto_handler_slots == 0)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
emit_stack_save (SAVE_NONLOCAL,
&nonlocal_goto_stack_level,
PREV_INSN (tail_recursion_reentry));
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
nonlocal_goto_handler_slots
= gen_rtx_EXPR_LIST (VOIDmode, slot, nonlocal_goto_handler_slots);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Generate RTL code for a `goto' statement with target label LABEL.
LABEL should be a LABEL_DECL tree node that was or will later be
defined with `expand_label'. */
void
expand_goto (label)
tree label;
{
tree context;
/* Check for a nonlocal goto to a containing function. */
context = decl_function_context (label);
if (context != 0 && context != current_function_decl)
{
struct function *p = find_function_data (context);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rtx label_ref = gen_rtx_LABEL_REF (Pmode, label_rtx (label));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx handler_slot, static_chain, save_area, insn;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
tree link;
/* Find the corresponding handler slot for this label. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
handler_slot = p->x_nonlocal_goto_handler_slots;
for (link = p->x_nonlocal_labels; TREE_VALUE (link) != label;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
link = TREE_CHAIN (link))
handler_slot = XEXP (handler_slot, 1);
handler_slot = XEXP (handler_slot, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
p->has_nonlocal_label = 1;
current_function_has_nonlocal_goto = 1;
LABEL_REF_NONLOCAL_P (label_ref) = 1;
/* Copy the rtl for the slots so that they won't be shared in
case the virtual stack vars register gets instantiated differently
in the parent than in the child. */
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2002-02-01 18:16:02 +00:00
static_chain = copy_to_reg (lookup_static_chain (label));
/* Get addr of containing function's current nonlocal goto handler,
which will do any cleanups and then jump to the label. */
handler_slot = copy_to_reg (replace_rtx (copy_rtx (handler_slot),
virtual_stack_vars_rtx,
static_chain));
/* Get addr of containing function's nonlocal save area. */
save_area = p->x_nonlocal_goto_stack_level;
if (save_area)
save_area = replace_rtx (copy_rtx (save_area),
virtual_stack_vars_rtx, static_chain);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#if HAVE_nonlocal_goto
if (HAVE_nonlocal_goto)
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2002-02-01 18:16:02 +00:00
emit_insn (gen_nonlocal_goto (static_chain, handler_slot,
save_area, label_ref));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
#endif
{
/* Restore frame pointer for containing function.
This sets the actual hard register used for the frame pointer
to the location of the function's incoming static chain info.
The non-local goto handler will then adjust it to contain the
proper value and reload the argument pointer, if needed. */
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2002-02-01 18:16:02 +00:00
emit_move_insn (hard_frame_pointer_rtx, static_chain);
emit_stack_restore (SAVE_NONLOCAL, save_area, NULL_RTX);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
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2002-02-01 18:16:02 +00:00
/* USE of hard_frame_pointer_rtx added for consistency;
not clear if really needed. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx));
emit_insn (gen_rtx_USE (VOIDmode, stack_pointer_rtx));
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2002-02-01 18:16:02 +00:00
emit_indirect_jump (handler_slot);
}
/* Search backwards to the jump insn and mark it as a
non-local goto. */
for (insn = get_last_insn (); insn; insn = PREV_INSN (insn))
{
if (GET_CODE (insn) == JUMP_INSN)
{
REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO,
const0_rtx, REG_NOTES (insn));
break;
}
else if (GET_CODE (insn) == CALL_INSN)
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
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2002-02-01 18:16:02 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
expand_goto_internal (label, label_rtx (label), NULL_RTX);
}
/* Generate RTL code for a `goto' statement with target label BODY.
LABEL should be a LABEL_REF.
LAST_INSN, if non-0, is the rtx we should consider as the last
insn emitted (for the purposes of cleaning up a return). */
static void
expand_goto_internal (body, label, last_insn)
tree body;
rtx label;
rtx last_insn;
{
struct nesting *block;
rtx stack_level = 0;
if (GET_CODE (label) != CODE_LABEL)
abort ();
/* If label has already been defined, we can tell now
whether and how we must alter the stack level. */
if (PREV_INSN (label) != 0)
{
/* Find the innermost pending block that contains the label.
(Check containment by comparing insn-uids.)
Then restore the outermost stack level within that block,
and do cleanups of all blocks contained in it. */
for (block = block_stack; block; block = block->next)
{
if (INSN_UID (block->data.block.first_insn) < INSN_UID (label))
break;
if (block->data.block.stack_level != 0)
stack_level = block->data.block.stack_level;
/* Execute the cleanups for blocks we are exiting. */
if (block->data.block.cleanups != 0)
{
expand_cleanups (block->data.block.cleanups, NULL_TREE, 1, 1);
do_pending_stack_adjust ();
}
}
if (stack_level)
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Ensure stack adjust isn't done by emit_jump, as this
would clobber the stack pointer. This one should be
deleted as dead by flow. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
clear_pending_stack_adjust ();
do_pending_stack_adjust ();
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2002-02-01 18:16:02 +00:00
/* Don't do this adjust if it's to the end label and this function
is to return with a depressed stack pointer. */
if (label == return_label
&& (((TREE_CODE (TREE_TYPE (current_function_decl))
== FUNCTION_TYPE)
&& (TYPE_RETURNS_STACK_DEPRESSED
(TREE_TYPE (current_function_decl))))))
;
else
emit_stack_restore (SAVE_BLOCK, stack_level, NULL_RTX);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
if (body != 0 && DECL_TOO_LATE (body))
error ("jump to `%s' invalidly jumps into binding contour",
IDENTIFIER_POINTER (DECL_NAME (body)));
}
/* Label not yet defined: may need to put this goto
on the fixup list. */
else if (! expand_fixup (body, label, last_insn))
{
/* No fixup needed. Record that the label is the target
of at least one goto that has no fixup. */
if (body != 0)
TREE_ADDRESSABLE (body) = 1;
}
emit_jump (label);
}
/* Generate if necessary a fixup for a goto
whose target label in tree structure (if any) is TREE_LABEL
and whose target in rtl is RTL_LABEL.
If LAST_INSN is nonzero, we pretend that the jump appears
after insn LAST_INSN instead of at the current point in the insn stream.
The fixup will be used later to insert insns just before the goto.
Those insns will restore the stack level as appropriate for the
target label, and will (in the case of C++) also invoke any object
destructors which have to be invoked when we exit the scopes which
are exited by the goto.
Value is nonzero if a fixup is made. */
static int
expand_fixup (tree_label, rtl_label, last_insn)
tree tree_label;
rtx rtl_label;
rtx last_insn;
{
struct nesting *block, *end_block;
/* See if we can recognize which block the label will be output in.
This is possible in some very common cases.
If we succeed, set END_BLOCK to that block.
Otherwise, set it to 0. */
if (cond_stack
&& (rtl_label == cond_stack->data.cond.endif_label
|| rtl_label == cond_stack->data.cond.next_label))
end_block = cond_stack;
/* If we are in a loop, recognize certain labels which
are likely targets. This reduces the number of fixups
we need to create. */
else if (loop_stack
&& (rtl_label == loop_stack->data.loop.start_label
|| rtl_label == loop_stack->data.loop.end_label
|| rtl_label == loop_stack->data.loop.continue_label))
end_block = loop_stack;
else
end_block = 0;
/* Now set END_BLOCK to the binding level to which we will return. */
if (end_block)
{
struct nesting *next_block = end_block->all;
block = block_stack;
/* First see if the END_BLOCK is inside the innermost binding level.
If so, then no cleanups or stack levels are relevant. */
while (next_block && next_block != block)
next_block = next_block->all;
if (next_block)
return 0;
/* Otherwise, set END_BLOCK to the innermost binding level
which is outside the relevant control-structure nesting. */
next_block = block_stack->next;
for (block = block_stack; block != end_block; block = block->all)
if (block == next_block)
next_block = next_block->next;
end_block = next_block;
}
/* Does any containing block have a stack level or cleanups?
If not, no fixup is needed, and that is the normal case
(the only case, for standard C). */
for (block = block_stack; block != end_block; block = block->next)
if (block->data.block.stack_level != 0
|| block->data.block.cleanups != 0)
break;
if (block != end_block)
{
/* Ok, a fixup is needed. Add a fixup to the list of such. */
struct goto_fixup *fixup
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
= (struct goto_fixup *) ggc_alloc (sizeof (struct goto_fixup));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* In case an old stack level is restored, make sure that comes
after any pending stack adjust. */
/* ?? If the fixup isn't to come at the present position,
doing the stack adjust here isn't useful. Doing it with our
settings at that location isn't useful either. Let's hope
someone does it! */
if (last_insn == 0)
do_pending_stack_adjust ();
fixup->target = tree_label;
fixup->target_rtl = rtl_label;
/* Create a BLOCK node and a corresponding matched set of
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes at
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
this point. The notes will encapsulate any and all fixup
code which we might later insert at this point in the insn
stream. Also, the BLOCK node will be the parent (i.e. the
`SUPERBLOCK') of any other BLOCK nodes which we might create
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
later on when we are expanding the fixup code.
Note that optimization passes (including expand_end_loop)
might move the *_BLOCK notes away, so we use a NOTE_INSN_DELETED
as a placeholder. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx original_before_jump
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
= last_insn ? last_insn : get_last_insn ();
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rtx start;
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2002-02-01 18:16:02 +00:00
rtx end;
tree block;
block = make_node (BLOCK);
TREE_USED (block) = 1;
if (!cfun->x_whole_function_mode_p)
insert_block (block);
else
{
BLOCK_CHAIN (block)
= BLOCK_CHAIN (DECL_INITIAL (current_function_decl));
BLOCK_CHAIN (DECL_INITIAL (current_function_decl))
= block;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
start_sequence ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
start = emit_note (NULL, NOTE_INSN_BLOCK_BEG);
if (cfun->x_whole_function_mode_p)
NOTE_BLOCK (start) = block;
fixup->before_jump = emit_note (NULL, NOTE_INSN_DELETED);
end = emit_note (NULL, NOTE_INSN_BLOCK_END);
if (cfun->x_whole_function_mode_p)
NOTE_BLOCK (end) = block;
fixup->context = block;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
end_sequence ();
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
emit_insns_after (start, original_before_jump);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
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2002-02-01 18:16:02 +00:00
fixup->block_start_count = current_block_start_count;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
fixup->stack_level = 0;
fixup->cleanup_list_list
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
= ((block->data.block.outer_cleanups
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
|| block->data.block.cleanups)
? tree_cons (NULL_TREE, block->data.block.cleanups,
block->data.block.outer_cleanups)
: 0);
fixup->next = goto_fixup_chain;
goto_fixup_chain = fixup;
}
return block != 0;
}
/* Expand any needed fixups in the outputmost binding level of the
function. FIRST_INSN is the first insn in the function. */
void
expand_fixups (first_insn)
rtx first_insn;
{
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2002-02-01 18:16:02 +00:00
fixup_gotos (NULL, NULL_RTX, NULL_TREE, first_insn, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* When exiting a binding contour, process all pending gotos requiring fixups.
THISBLOCK is the structure that describes the block being exited.
STACK_LEVEL is the rtx for the stack level to restore exiting this contour.
CLEANUP_LIST is a list of expressions to evaluate on exiting this contour.
FIRST_INSN is the insn that began this contour.
Gotos that jump out of this contour must restore the
stack level and do the cleanups before actually jumping.
DONT_JUMP_IN nonzero means report error there is a jump into this
contour from before the beginning of the contour.
This is also done if STACK_LEVEL is nonzero. */
static void
fixup_gotos (thisblock, stack_level, cleanup_list, first_insn, dont_jump_in)
struct nesting *thisblock;
rtx stack_level;
tree cleanup_list;
rtx first_insn;
int dont_jump_in;
{
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2002-02-01 18:16:02 +00:00
struct goto_fixup *f, *prev;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* F is the fixup we are considering; PREV is the previous one. */
/* We run this loop in two passes so that cleanups of exited blocks
are run first, and blocks that are exited are marked so
afterwards. */
for (prev = 0, f = goto_fixup_chain; f; prev = f, f = f->next)
{
/* Test for a fixup that is inactive because it is already handled. */
if (f->before_jump == 0)
{
/* Delete inactive fixup from the chain, if that is easy to do. */
if (prev != 0)
prev->next = f->next;
}
/* Has this fixup's target label been defined?
If so, we can finalize it. */
else if (PREV_INSN (f->target_rtl) != 0)
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx cleanup_insns;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If this fixup jumped into this contour from before the beginning
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
of this contour, report an error. This code used to use
the first non-label insn after f->target_rtl, but that's
wrong since such can be added, by things like put_var_into_stack
and have INSN_UIDs that are out of the range of the block. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* ??? Bug: this does not detect jumping in through intermediate
blocks that have stack levels or cleanups.
It detects only a problem with the innermost block
around the label. */
if (f->target != 0
&& (dont_jump_in || stack_level || cleanup_list)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& INSN_UID (first_insn) < INSN_UID (f->target_rtl)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
&& INSN_UID (first_insn) > INSN_UID (f->before_jump)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
&& ! DECL_ERROR_ISSUED (f->target))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
error_with_decl (f->target,
"label `%s' used before containing binding contour");
/* Prevent multiple errors for one label. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
DECL_ERROR_ISSUED (f->target) = 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* We will expand the cleanups into a sequence of their own and
then later on we will attach this new sequence to the insn
stream just ahead of the actual jump insn. */
start_sequence ();
/* Temporarily restore the lexical context where we will
logically be inserting the fixup code. We do this for the
sake of getting the debugging information right. */
pushlevel (0);
set_block (f->context);
/* Expand the cleanups for blocks this jump exits. */
if (f->cleanup_list_list)
{
tree lists;
for (lists = f->cleanup_list_list; lists; lists = TREE_CHAIN (lists))
/* Marked elements correspond to blocks that have been closed.
Do their cleanups. */
if (TREE_ADDRESSABLE (lists)
&& TREE_VALUE (lists) != 0)
{
expand_cleanups (TREE_VALUE (lists), NULL_TREE, 1, 1);
/* Pop any pushes done in the cleanups,
in case function is about to return. */
do_pending_stack_adjust ();
}
}
/* Restore stack level for the biggest contour that this
jump jumps out of. */
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2002-02-01 18:16:02 +00:00
if (f->stack_level
&& ! (f->target_rtl == return_label
&& ((TREE_CODE (TREE_TYPE (current_function_decl))
== FUNCTION_TYPE)
&& (TYPE_RETURNS_STACK_DEPRESSED
(TREE_TYPE (current_function_decl))))))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_stack_restore (SAVE_BLOCK, f->stack_level, f->before_jump);
/* Finish up the sequence containing the insns which implement the
necessary cleanups, and then attach that whole sequence to the
insn stream just ahead of the actual jump insn. Attaching it
at that point insures that any cleanups which are in fact
implicit C++ object destructions (which must be executed upon
leaving the block) appear (to the debugger) to be taking place
in an area of the generated code where the object(s) being
destructed are still "in scope". */
cleanup_insns = get_insns ();
poplevel (1, 0, 0);
end_sequence ();
emit_insns_after (cleanup_insns, f->before_jump);
f->before_jump = 0;
}
}
/* For any still-undefined labels, do the cleanups for this block now.
We must do this now since items in the cleanup list may go out
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
of scope when the block ends. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (prev = 0, f = goto_fixup_chain; f; prev = f, f = f->next)
if (f->before_jump != 0
&& PREV_INSN (f->target_rtl) == 0
/* Label has still not appeared. If we are exiting a block with
a stack level to restore, that started before the fixup,
mark this stack level as needing restoration
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
when the fixup is later finalized. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
&& thisblock != 0
/* Note: if THISBLOCK == 0 and we have a label that hasn't appeared, it
means the label is undefined. That's erroneous, but possible. */
&& (thisblock->data.block.block_start_count
<= f->block_start_count))
{
tree lists = f->cleanup_list_list;
rtx cleanup_insns;
for (; lists; lists = TREE_CHAIN (lists))
/* If the following elt. corresponds to our containing block
then the elt. must be for this block. */
if (TREE_CHAIN (lists) == thisblock->data.block.outer_cleanups)
{
start_sequence ();
pushlevel (0);
set_block (f->context);
expand_cleanups (TREE_VALUE (lists), NULL_TREE, 1, 1);
do_pending_stack_adjust ();
cleanup_insns = get_insns ();
poplevel (1, 0, 0);
end_sequence ();
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (cleanup_insns != 0)
f->before_jump
= emit_insns_after (cleanup_insns, f->before_jump);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
f->cleanup_list_list = TREE_CHAIN (lists);
}
if (stack_level)
f->stack_level = stack_level;
}
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Return the number of times character C occurs in string S. */
static int
n_occurrences (c, s)
int c;
const char *s;
{
int n = 0;
while (*s)
n += (*s++ == c);
return n;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Generate RTL for an asm statement (explicit assembler code).
BODY is a STRING_CST node containing the assembler code text,
or an ADDR_EXPR containing a STRING_CST. */
void
expand_asm (body)
tree body;
{
if (TREE_CODE (body) == ADDR_EXPR)
body = TREE_OPERAND (body, 0);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
emit_insn (gen_rtx_ASM_INPUT (VOIDmode,
TREE_STRING_POINTER (body)));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
last_expr_type = 0;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Parse the output constraint pointed to by *CONSTRAINT_P. It is the
OPERAND_NUMth output operand, indexed from zero. There are NINPUTS
inputs and NOUTPUTS outputs to this extended-asm. Upon return,
*ALLOWS_MEM will be TRUE iff the constraint allows the use of a
memory operand. Similarly, *ALLOWS_REG will be TRUE iff the
constraint allows the use of a register operand. And, *IS_INOUT
will be true if the operand is read-write, i.e., if it is used as
an input as well as an output. If *CONSTRAINT_P is not in
canonical form, it will be made canonical. (Note that `+' will be
rpelaced with `=' as part of this process.)
Returns TRUE if all went well; FALSE if an error occurred. */
bool
parse_output_constraint (constraint_p, operand_num, ninputs, noutputs,
allows_mem, allows_reg, is_inout)
const char **constraint_p;
int operand_num;
int ninputs;
int noutputs;
bool *allows_mem;
bool *allows_reg;
bool *is_inout;
{
const char *constraint = *constraint_p;
const char *p;
/* Assume the constraint doesn't allow the use of either a register
or memory. */
*allows_mem = false;
*allows_reg = false;
/* Allow the `=' or `+' to not be at the beginning of the string,
since it wasn't explicitly documented that way, and there is a
large body of code that puts it last. Swap the character to
the front, so as not to uglify any place else. */
p = strchr (constraint, '=');
if (!p)
p = strchr (constraint, '+');
/* If the string doesn't contain an `=', issue an error
message. */
if (!p)
{
error ("output operand constraint lacks `='");
return false;
}
/* If the constraint begins with `+', then the operand is both read
from and written to. */
*is_inout = (*p == '+');
/* Canonicalize the output constraint so that it begins with `='. */
if (p != constraint || is_inout)
{
char *buf;
size_t c_len = strlen (constraint);
if (p != constraint)
warning ("output constraint `%c' for operand %d is not at the beginning",
*p, operand_num);
/* Make a copy of the constraint. */
buf = alloca (c_len + 1);
strcpy (buf, constraint);
/* Swap the first character and the `=' or `+'. */
buf[p - constraint] = buf[0];
/* Make sure the first character is an `='. (Until we do this,
it might be a `+'.) */
buf[0] = '=';
/* Replace the constraint with the canonicalized string. */
*constraint_p = ggc_alloc_string (buf, c_len);
constraint = *constraint_p;
}
/* Loop through the constraint string. */
for (p = constraint + 1; *p; ++p)
switch (*p)
{
case '+':
case '=':
error ("operand constraint contains incorrectly positioned '+' or '='");
return false;
case '%':
if (operand_num + 1 == ninputs + noutputs)
{
error ("`%%' constraint used with last operand");
return false;
}
break;
case 'V': case 'm': case 'o':
*allows_mem = true;
break;
case '?': case '!': case '*': case '&': case '#':
case 'E': case 'F': case 'G': case 'H':
case 's': case 'i': case 'n':
case 'I': case 'J': case 'K': case 'L': case 'M':
case 'N': case 'O': case 'P': case ',':
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case '[':
error ("matching constraint not valid in output operand");
return false;
case '<': case '>':
/* ??? Before flow, auto inc/dec insns are not supposed to exist,
excepting those that expand_call created. So match memory
and hope. */
*allows_mem = true;
break;
case 'g': case 'X':
*allows_reg = true;
*allows_mem = true;
break;
case 'p': case 'r':
*allows_reg = true;
break;
default:
if (!ISALPHA (*p))
break;
if (REG_CLASS_FROM_LETTER (*p) != NO_REGS)
*allows_reg = true;
#ifdef EXTRA_CONSTRAINT
else
{
/* Otherwise we can't assume anything about the nature of
the constraint except that it isn't purely registers.
Treat it like "g" and hope for the best. */
*allows_reg = true;
*allows_mem = true;
}
#endif
break;
}
return true;
}
/* Similar, but for input constraints. */
static bool
parse_input_constraint (constraint_p, input_num, ninputs, noutputs, ninout,
constraints, allows_mem, allows_reg)
const char **constraint_p;
int input_num;
int ninputs;
int noutputs;
int ninout;
const char * const * constraints;
bool *allows_mem;
bool *allows_reg;
{
const char *constraint = *constraint_p;
const char *orig_constraint = constraint;
size_t c_len = strlen (constraint);
size_t j;
/* Assume the constraint doesn't allow the use of either
a register or memory. */
*allows_mem = false;
*allows_reg = false;
/* Make sure constraint has neither `=', `+', nor '&'. */
for (j = 0; j < c_len; j++)
switch (constraint[j])
{
case '+': case '=': case '&':
if (constraint == orig_constraint)
{
error ("input operand constraint contains `%c'", constraint[j]);
return false;
}
break;
case '%':
if (constraint == orig_constraint
&& input_num + 1 == ninputs - ninout)
{
error ("`%%' constraint used with last operand");
return false;
}
break;
case 'V': case 'm': case 'o':
*allows_mem = true;
break;
case '<': case '>':
case '?': case '!': case '*': case '#':
case 'E': case 'F': case 'G': case 'H':
case 's': case 'i': case 'n':
case 'I': case 'J': case 'K': case 'L': case 'M':
case 'N': case 'O': case 'P': case ',':
break;
/* Whether or not a numeric constraint allows a register is
decided by the matching constraint, and so there is no need
to do anything special with them. We must handle them in
the default case, so that we don't unnecessarily force
operands to memory. */
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
{
char *end;
unsigned long match;
match = strtoul (constraint + j, &end, 10);
if (match >= (unsigned long) noutputs)
{
error ("matching constraint references invalid operand number");
return false;
}
/* Try and find the real constraint for this dup. Only do this
if the matching constraint is the only alternative. */
if (*end == '\0'
&& (j == 0 || (j == 1 && constraint[0] == '%')))
{
constraint = constraints[match];
*constraint_p = constraint;
c_len = strlen (constraint);
j = 0;
break;
}
else
j = end - constraint;
}
/* Fall through. */
case 'p': case 'r':
*allows_reg = true;
break;
case 'g': case 'X':
*allows_reg = true;
*allows_mem = true;
break;
default:
if (! ISALPHA (constraint[j]))
{
error ("invalid punctuation `%c' in constraint", constraint[j]);
return false;
}
if (REG_CLASS_FROM_LETTER (constraint[j]) != NO_REGS)
*allows_reg = true;
#ifdef EXTRA_CONSTRAINT
else
{
/* Otherwise we can't assume anything about the nature of
the constraint except that it isn't purely registers.
Treat it like "g" and hope for the best. */
*allows_reg = true;
*allows_mem = true;
}
#endif
break;
}
return true;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Generate RTL for an asm statement with arguments.
STRING is the instruction template.
OUTPUTS is a list of output arguments (lvalues); INPUTS a list of inputs.
Each output or input has an expression in the TREE_VALUE and
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
and a tree list in TREE_PURPOSE which in turn contains a constraint
name in TREE_VALUE (or NULL_TREE) and a constraint string
in TREE_PURPOSE.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
CLOBBERS is a list of STRING_CST nodes each naming a hard register
that is clobbered by this insn.
Not all kinds of lvalue that may appear in OUTPUTS can be stored directly.
Some elements of OUTPUTS may be replaced with trees representing temporary
values. The caller should copy those temporary values to the originally
specified lvalues.
VOL nonzero means the insn is volatile; don't optimize it. */
void
expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
tree string, outputs, inputs, clobbers;
int vol;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *filename;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
int line;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtvec argvec, constraintvec;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx body;
int ninputs = list_length (inputs);
int noutputs = list_length (outputs);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int ninout;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
int nclobbers;
tree tail;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int i;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Vector of RTX's of evaluated output operands. */
rtx *output_rtx = (rtx *) alloca (noutputs * sizeof (rtx));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
int *inout_opnum = (int *) alloca (noutputs * sizeof (int));
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
rtx *real_output_rtx = (rtx *) alloca (noutputs * sizeof (rtx));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
enum machine_mode *inout_mode
= (enum machine_mode *) alloca (noutputs * sizeof (enum machine_mode));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char **constraints
= (const char **) alloca ((noutputs + ninputs) * sizeof (const char *));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* The insn we have emitted. */
rtx insn;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int old_generating_concat_p = generating_concat_p;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* An ASM with no outputs needs to be treated as volatile, for now. */
if (noutputs == 0)
vol = 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! check_operand_nalternatives (outputs, inputs))
return;
if (! check_unique_operand_names (outputs, inputs))
return;
string = resolve_operand_names (string, outputs, inputs, constraints);
#ifdef MD_ASM_CLOBBERS
/* Sometimes we wish to automatically clobber registers across an asm.
Case in point is when the i386 backend moved from cc0 to a hard reg --
maintaining source-level compatibility means automatically clobbering
the flags register. */
MD_ASM_CLOBBERS (clobbers);
#endif
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Count the number of meaningful clobbered registers, ignoring what
we would ignore later. */
nclobbers = 0;
for (tail = clobbers; tail; tail = TREE_CHAIN (tail))
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *regname = TREE_STRING_POINTER (TREE_VALUE (tail));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
i = decode_reg_name (regname);
if (i >= 0 || i == -4)
++nclobbers;
else if (i == -2)
error ("unknown register name `%s' in `asm'", regname);
}
last_expr_type = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* First pass over inputs and outputs checks validity and sets
mark_addressable if needed. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
ninout = 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++)
{
tree val = TREE_VALUE (tail);
tree type = TREE_TYPE (val);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *constraint;
bool is_inout;
bool allows_reg;
bool allows_mem;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If there's an erroneous arg, emit no insn. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (type == error_mark_node)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Try to parse the output constraint. If that fails, there's
no point in going further. */
constraint = constraints[i];
if (!parse_output_constraint (&constraint, i, ninputs, noutputs,
&allows_mem, &allows_reg, &is_inout))
return;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! allows_reg
&& (allows_mem
|| is_inout
|| (DECL_P (val)
&& GET_CODE (DECL_RTL (val)) == REG
&& GET_MODE (DECL_RTL (val)) != TYPE_MODE (type))))
mark_addressable (val);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (is_inout)
ninout++;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
ninputs += ninout;
if (ninputs + noutputs > MAX_RECOG_OPERANDS)
{
error ("more than %d operands in `asm'", MAX_RECOG_OPERANDS);
return;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (i = 0, tail = inputs; tail; i++, tail = TREE_CHAIN (tail))
{
bool allows_reg, allows_mem;
const char *constraint;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If there's an erroneous arg, emit no insn, because the ASM_INPUT
would get VOIDmode and that could cause a crash in reload. */
if (TREE_TYPE (TREE_VALUE (tail)) == error_mark_node)
return;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
constraint = constraints[i + noutputs];
if (! parse_input_constraint (&constraint, i, ninputs, noutputs, ninout,
constraints, &allows_mem, &allows_reg))
return;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! allows_reg && allows_mem)
mark_addressable (TREE_VALUE (tail));
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Second pass evaluates arguments. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
ninout = 0;
for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++)
{
tree val = TREE_VALUE (tail);
tree type = TREE_TYPE (val);
bool is_inout;
bool allows_reg;
bool allows_mem;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (!parse_output_constraint (&constraints[i], i, ninputs,
noutputs, &allows_mem, &allows_reg,
&is_inout))
abort ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If an output operand is not a decl or indirect ref and our constraint
allows a register, make a temporary to act as an intermediate.
Make the asm insn write into that, then our caller will copy it to
the real output operand. Likewise for promoted variables. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
generating_concat_p = 0;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
real_output_rtx[i] = NULL_RTX;
if ((TREE_CODE (val) == INDIRECT_REF
&& allows_mem)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
|| (DECL_P (val)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
&& (allows_mem || GET_CODE (DECL_RTL (val)) == REG)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
&& ! (GET_CODE (DECL_RTL (val)) == REG
&& GET_MODE (DECL_RTL (val)) != TYPE_MODE (type)))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
|| ! allows_reg
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
|| is_inout)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
output_rtx[i] = expand_expr (val, NULL_RTX, VOIDmode, EXPAND_WRITE);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (! allows_reg && GET_CODE (output_rtx[i]) != MEM)
error ("output number %d not directly addressable", i);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if ((! allows_mem && GET_CODE (output_rtx[i]) == MEM)
|| GET_CODE (output_rtx[i]) == CONCAT)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
real_output_rtx[i] = protect_from_queue (output_rtx[i], 1);
output_rtx[i] = gen_reg_rtx (GET_MODE (output_rtx[i]));
if (is_inout)
emit_move_insn (output_rtx[i], real_output_rtx[i]);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
else
{
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
output_rtx[i] = assign_temp (type, 0, 0, 1);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
TREE_VALUE (tail) = make_tree (type, output_rtx[i]);
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
generating_concat_p = old_generating_concat_p;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (is_inout)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
inout_mode[ninout] = TYPE_MODE (type);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
inout_opnum[ninout++] = i;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Make vectors for the expression-rtx, constraint strings,
and named operands. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
argvec = rtvec_alloc (ninputs);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
constraintvec = rtvec_alloc (ninputs);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
body = gen_rtx_ASM_OPERANDS ((noutputs == 0 ? VOIDmode
: GET_MODE (output_rtx[0])),
TREE_STRING_POINTER (string),
empty_string, 0, argvec, constraintvec,
filename, line);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
MEM_VOLATILE_P (body) = vol;
/* Eval the inputs and put them into ARGVEC.
Put their constraints into ASM_INPUTs and store in CONSTRAINTS. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (i = 0, tail = inputs; tail; tail = TREE_CHAIN (tail), ++i)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
bool allows_reg, allows_mem;
const char *constraint;
tree val, type;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
rtx op;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
constraint = constraints[i + noutputs];
if (! parse_input_constraint (&constraint, i, ninputs, noutputs, ninout,
constraints, &allows_mem, &allows_reg))
abort ();
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
generating_concat_p = 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
val = TREE_VALUE (tail);
type = TREE_TYPE (val);
op = expand_expr (val, NULL_RTX, VOIDmode, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Never pass a CONCAT to an ASM. */
if (GET_CODE (op) == CONCAT)
op = force_reg (GET_MODE (op), op);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (asm_operand_ok (op, constraint) <= 0)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
if (allows_reg)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
op = force_reg (TYPE_MODE (type), op);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else if (!allows_mem)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
warning ("asm operand %d probably doesn't match constraints",
i + noutputs);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else if (CONSTANT_P (op))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
op = force_const_mem (TYPE_MODE (type), op);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else if (GET_CODE (op) == REG
|| GET_CODE (op) == SUBREG
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
|| GET_CODE (op) == ADDRESSOF
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
|| GET_CODE (op) == CONCAT)
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tree qual_type = build_qualified_type (type,
(TYPE_QUALS (type)
| TYPE_QUAL_CONST));
rtx memloc = assign_temp (qual_type, 1, 1, 1);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
emit_move_insn (memloc, op);
op = memloc;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else if (GET_CODE (op) == MEM && MEM_VOLATILE_P (op))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
/* We won't recognize volatile memory as available a
memory_operand at this point. Ignore it. */
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
else if (queued_subexp_p (op))
;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* ??? Leave this only until we have experience with what
happens in combine and elsewhere when constraints are
not satisfied. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
warning ("asm operand %d probably doesn't match constraints",
i + noutputs);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
generating_concat_p = old_generating_concat_p;
ASM_OPERANDS_INPUT (body, i) = op;
ASM_OPERANDS_INPUT_CONSTRAINT_EXP (body, i)
= gen_rtx_ASM_INPUT (TYPE_MODE (type), constraints[i + noutputs]);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Protect all the operands from the queue now that they have all been
evaluated. */
generating_concat_p = 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
for (i = 0; i < ninputs - ninout; i++)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
ASM_OPERANDS_INPUT (body, i)
= protect_from_queue (ASM_OPERANDS_INPUT (body, i), 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (i = 0; i < noutputs; i++)
output_rtx[i] = protect_from_queue (output_rtx[i], 1);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* For in-out operands, copy output rtx to input rtx. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
for (i = 0; i < ninout; i++)
{
int j = inout_opnum[i];
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
char buffer[16];
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
ASM_OPERANDS_INPUT (body, ninputs - ninout + i)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
= output_rtx[j];
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
sprintf (buffer, "%d", j);
ASM_OPERANDS_INPUT_CONSTRAINT_EXP (body, ninputs - ninout + i)
= gen_rtx_ASM_INPUT (inout_mode[i], ggc_alloc_string (buffer, -1));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
generating_concat_p = old_generating_concat_p;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Now, for each output, construct an rtx
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
(set OUTPUT (asm_operands INSN OUTPUTCONSTRAINT OUTPUTNUMBER
ARGVEC CONSTRAINTS OPNAMES))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
If there is more than one, put them inside a PARALLEL. */
if (noutputs == 1 && nclobbers == 0)
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
ASM_OPERANDS_OUTPUT_CONSTRAINT (body) = constraints[0];
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
insn = emit_insn (gen_rtx_SET (VOIDmode, output_rtx[0], body));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else if (noutputs == 0 && nclobbers == 0)
{
/* No output operands: put in a raw ASM_OPERANDS rtx. */
insn = emit_insn (body);
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
{
rtx obody = body;
int num = noutputs;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (num == 0)
num = 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
body = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (num + nclobbers));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* For each output operand, store a SET. */
for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++)
{
XVECEXP (body, 0, i)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
= gen_rtx_SET (VOIDmode,
output_rtx[i],
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
gen_rtx_ASM_OPERANDS
(GET_MODE (output_rtx[i]),
TREE_STRING_POINTER (string),
constraints[i], i, argvec, constraintvec,
filename, line));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
MEM_VOLATILE_P (SET_SRC (XVECEXP (body, 0, i))) = vol;
}
/* If there are no outputs (but there are some clobbers)
store the bare ASM_OPERANDS into the PARALLEL. */
if (i == 0)
XVECEXP (body, 0, i++) = obody;
/* Store (clobber REG) for each clobbered register specified. */
for (tail = clobbers; tail; tail = TREE_CHAIN (tail))
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *regname = TREE_STRING_POINTER (TREE_VALUE (tail));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
int j = decode_reg_name (regname);
if (j < 0)
{
if (j == -3) /* `cc', which is not a register */
continue;
if (j == -4) /* `memory', don't cache memory across asm */
{
XVECEXP (body, 0, i++)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
= gen_rtx_CLOBBER (VOIDmode,
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
gen_rtx_MEM
(BLKmode,
gen_rtx_SCRATCH (VOIDmode)));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
continue;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Ignore unknown register, error already signaled. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
continue;
}
/* Use QImode since that's guaranteed to clobber just one reg. */
XVECEXP (body, 0, i++)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
= gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (QImode, j));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
insn = emit_insn (body);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* For any outputs that needed reloading into registers, spill them
back to where they belong. */
for (i = 0; i < noutputs; ++i)
if (real_output_rtx[i])
emit_move_insn (real_output_rtx[i], output_rtx[i]);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
free_temp_slots ();
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* A subroutine of expand_asm_operands. Check that all operands have
the same number of alternatives. Return true if so. */
static bool
check_operand_nalternatives (outputs, inputs)
tree outputs, inputs;
{
if (outputs || inputs)
{
tree tmp = TREE_PURPOSE (outputs ? outputs : inputs);
int nalternatives
= n_occurrences (',', TREE_STRING_POINTER (TREE_VALUE (tmp)));
tree next = inputs;
if (nalternatives + 1 > MAX_RECOG_ALTERNATIVES)
{
error ("too many alternatives in `asm'");
return false;
}
tmp = outputs;
while (tmp)
{
const char *constraint
= TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (tmp)));
if (n_occurrences (',', constraint) != nalternatives)
{
error ("operand constraints for `asm' differ in number of alternatives");
return false;
}
if (TREE_CHAIN (tmp))
tmp = TREE_CHAIN (tmp);
else
tmp = next, next = 0;
}
}
return true;
}
/* A subroutine of expand_asm_operands. Check that all operand names
are unique. Return true if so. We rely on the fact that these names
are identifiers, and so have been canonicalized by get_identifier,
so all we need are pointer comparisons. */
static bool
check_unique_operand_names (outputs, inputs)
tree outputs, inputs;
{
tree i, j;
for (i = outputs; i ; i = TREE_CHAIN (i))
{
tree i_name = TREE_PURPOSE (TREE_PURPOSE (i));
if (! i_name)
continue;
for (j = TREE_CHAIN (i); j ; j = TREE_CHAIN (j))
if (i_name == TREE_PURPOSE (TREE_PURPOSE (j)))
goto failure;
}
for (i = inputs; i ; i = TREE_CHAIN (i))
{
tree i_name = TREE_PURPOSE (TREE_PURPOSE (i));
if (! i_name)
continue;
for (j = TREE_CHAIN (i); j ; j = TREE_CHAIN (j))
if (i_name == TREE_PURPOSE (TREE_PURPOSE (j)))
goto failure;
for (j = outputs; j ; j = TREE_CHAIN (j))
if (i_name == TREE_PURPOSE (TREE_PURPOSE (j)))
goto failure;
}
return true;
failure:
error ("duplicate asm operand name '%s'",
IDENTIFIER_POINTER (TREE_PURPOSE (TREE_PURPOSE (i))));
return false;
}
/* A subroutine of expand_asm_operands. Resolve the names of the operands
in *POUTPUTS and *PINPUTS to numbers, and replace the name expansions in
STRING and in the constraints to those numbers. */
static tree
resolve_operand_names (string, outputs, inputs, pconstraints)
tree string;
tree outputs, inputs;
const char **pconstraints;
{
char *buffer = xstrdup (TREE_STRING_POINTER (string));
char *p;
tree t;
/* Assume that we will not need extra space to perform the substitution.
This because we get to remove '[' and ']', which means we cannot have
a problem until we have more than 999 operands. */
p = buffer;
while ((p = strchr (p, '%')) != NULL)
{
if (p[1] == '[')
p += 1;
else if (ISALPHA (p[1]) && p[2] == '[')
p += 2;
else
{
p += 1;
continue;
}
p = resolve_operand_name_1 (p, outputs, inputs);
}
string = build_string (strlen (buffer), buffer);
free (buffer);
/* Collect output constraints here because it's convenient.
There should be no named operands here; this is verified
in expand_asm_operand. */
for (t = outputs; t ; t = TREE_CHAIN (t), pconstraints++)
*pconstraints = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t)));
/* Substitute [<name>] in input constraint strings. */
for (t = inputs; t ; t = TREE_CHAIN (t), pconstraints++)
{
const char *c = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t)));
if (strchr (c, '[') == NULL)
*pconstraints = c;
else
{
p = buffer = xstrdup (c);
while ((p = strchr (p, '[')) != NULL)
p = resolve_operand_name_1 (p, outputs, inputs);
*pconstraints = ggc_alloc_string (buffer, -1);
free (buffer);
}
}
return string;
}
/* A subroutine of resolve_operand_names. P points to the '[' for a
potential named operand of the form [<name>]. In place, replace
the name and brackets with a number. Return a pointer to the
balance of the string after substitution. */
static char *
resolve_operand_name_1 (p, outputs, inputs)
char *p;
tree outputs, inputs;
{
char *q;
int op;
tree t;
size_t len;
/* Collect the operand name. */
q = strchr (p, ']');
if (!q)
{
error ("missing close brace for named operand");
return strchr (p, '\0');
}
len = q - p - 1;
/* Resolve the name to a number. */
for (op = 0, t = outputs; t ; t = TREE_CHAIN (t), op++)
{
const char *c = IDENTIFIER_POINTER (TREE_PURPOSE (TREE_PURPOSE (t)));
if (strncmp (c, p + 1, len) == 0 && c[len] == '\0')
goto found;
}
for (t = inputs; t ; t = TREE_CHAIN (t), op++)
{
const char *c = IDENTIFIER_POINTER (TREE_PURPOSE (TREE_PURPOSE (t)));
if (strncmp (c, p + 1, len) == 0 && c[len] == '\0')
goto found;
}
*q = '\0';
error ("undefined named operand '%s'", p + 1);
op = 0;
found:
/* Replace the name with the number. Unfortunately, not all libraries
get the return value of sprintf correct, so search for the end of the
generated string by hand. */
sprintf (p, "%d", op);
p = strchr (p, '\0');
/* Verify the no extra buffer space assumption. */
if (p > q)
abort ();
/* Shift the rest of the buffer down to fill the gap. */
memmove (p, q + 1, strlen (q + 1) + 1);
return p;
}
/* Generate RTL to evaluate the expression EXP
and remember it in case this is the VALUE in a ({... VALUE; }) constr.
Provided just for backward-compatibility. expand_expr_stmt_value()
should be used for new code. */
void
expand_expr_stmt (exp)
tree exp;
{
expand_expr_stmt_value (exp, -1, 1);
}
/* Generate RTL to evaluate the expression EXP. WANT_VALUE tells
whether to (1) save the value of the expression, (0) discard it or
(-1) use expr_stmts_for_value to tell. The use of -1 is
deprecated, and retained only for backward compatibility. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
void
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
expand_expr_stmt_value (exp, want_value, maybe_last)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree exp;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int want_value, maybe_last;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx value;
tree type;
if (want_value == -1)
want_value = expr_stmts_for_value != 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If -W, warn about statements with no side effects,
except for an explicit cast to void (e.g. for assert()), and
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
except for last statement in ({...}) where they may be useful. */
if (! want_value
&& (expr_stmts_for_value == 0 || ! maybe_last)
&& exp != error_mark_node)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! TREE_SIDE_EFFECTS (exp))
{
if ((extra_warnings || warn_unused_value)
&& !(TREE_CODE (exp) == CONVERT_EXPR
&& VOID_TYPE_P (TREE_TYPE (exp))))
warning_with_file_and_line (emit_filename, emit_lineno,
"statement with no effect");
}
else if (warn_unused_value)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
warn_if_unused_value (exp);
}
/* If EXP is of function type and we are expanding statements for
value, convert it to pointer-to-function. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (want_value && TREE_CODE (TREE_TYPE (exp)) == FUNCTION_TYPE)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
exp = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (exp)), exp);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* The call to `expand_expr' could cause last_expr_type and
last_expr_value to get reset. Therefore, we set last_expr_value
and last_expr_type *after* calling expand_expr. */
value = expand_expr (exp, want_value ? NULL_RTX : const0_rtx,
VOIDmode, 0);
type = TREE_TYPE (exp);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If all we do is reference a volatile value in memory,
copy it to a register to be sure it is actually touched. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (value && GET_CODE (value) == MEM && TREE_THIS_VOLATILE (exp))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (TYPE_MODE (type) == VOIDmode)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (TYPE_MODE (type) != BLKmode)
value = copy_to_reg (value);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
{
rtx lab = gen_label_rtx ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Compare the value with itself to reference it. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (value, value, EQ,
expand_expr (TYPE_SIZE (type),
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
NULL_RTX, VOIDmode, 0),
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
BLKmode, 0, lab);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_label (lab);
}
}
/* If this expression is part of a ({...}) and is in memory, we may have
to preserve temporaries. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
preserve_temp_slots (value);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Free any temporaries used to evaluate this expression. Any temporary
used as a result of this expression will already have been preserved
above. */
free_temp_slots ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (want_value)
{
last_expr_value = value;
last_expr_type = type;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_queue ();
}
/* Warn if EXP contains any computations whose results are not used.
Return 1 if a warning is printed; 0 otherwise. */
int
warn_if_unused_value (exp)
tree exp;
{
if (TREE_USED (exp))
return 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Don't warn about void constructs. This includes casting to void,
void function calls, and statement expressions with a final cast
to void. */
if (VOID_TYPE_P (TREE_TYPE (exp)))
return 0;
/* If this is an expression with side effects, don't warn. */
if (TREE_SIDE_EFFECTS (exp))
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
switch (TREE_CODE (exp))
{
case PREINCREMENT_EXPR:
case POSTINCREMENT_EXPR:
case PREDECREMENT_EXPR:
case POSTDECREMENT_EXPR:
case MODIFY_EXPR:
case INIT_EXPR:
case TARGET_EXPR:
case CALL_EXPR:
case METHOD_CALL_EXPR:
case RTL_EXPR:
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
case TRY_CATCH_EXPR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case WITH_CLEANUP_EXPR:
case EXIT_EXPR:
return 0;
case BIND_EXPR:
/* For a binding, warn if no side effect within it. */
return warn_if_unused_value (TREE_OPERAND (exp, 1));
case SAVE_EXPR:
return warn_if_unused_value (TREE_OPERAND (exp, 1));
case TRUTH_ORIF_EXPR:
case TRUTH_ANDIF_EXPR:
/* In && or ||, warn if 2nd operand has no side effect. */
return warn_if_unused_value (TREE_OPERAND (exp, 1));
case COMPOUND_EXPR:
if (TREE_NO_UNUSED_WARNING (exp))
return 0;
if (warn_if_unused_value (TREE_OPERAND (exp, 0)))
return 1;
/* Let people do `(foo (), 0)' without a warning. */
if (TREE_CONSTANT (TREE_OPERAND (exp, 1)))
return 0;
return warn_if_unused_value (TREE_OPERAND (exp, 1));
case NOP_EXPR:
case CONVERT_EXPR:
case NON_LVALUE_EXPR:
/* Don't warn about conversions not explicit in the user's program. */
if (TREE_NO_UNUSED_WARNING (exp))
return 0;
/* Assignment to a cast usually results in a cast of a modify.
Don't complain about that. There can be an arbitrary number of
casts before the modify, so we must loop until we find the first
non-cast expression and then test to see if that is a modify. */
{
tree tem = TREE_OPERAND (exp, 0);
while (TREE_CODE (tem) == CONVERT_EXPR || TREE_CODE (tem) == NOP_EXPR)
tem = TREE_OPERAND (tem, 0);
if (TREE_CODE (tem) == MODIFY_EXPR || TREE_CODE (tem) == INIT_EXPR
|| TREE_CODE (tem) == CALL_EXPR)
return 0;
}
goto warn;
case INDIRECT_REF:
/* Don't warn about automatic dereferencing of references, since
the user cannot control it. */
if (TREE_CODE (TREE_TYPE (TREE_OPERAND (exp, 0))) == REFERENCE_TYPE)
return warn_if_unused_value (TREE_OPERAND (exp, 0));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Fall through. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
default:
/* Referencing a volatile value is a side effect, so don't warn. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if ((DECL_P (exp)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
|| TREE_CODE_CLASS (TREE_CODE (exp)) == 'r')
&& TREE_THIS_VOLATILE (exp))
return 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If this is an expression which has no operands, there is no value
to be unused. There are no such language-independent codes,
but front ends may define such. */
if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'e'
&& TREE_CODE_LENGTH (TREE_CODE (exp)) == 0)
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
warn:
warning_with_file_and_line (emit_filename, emit_lineno,
"value computed is not used");
return 1;
}
}
/* Clear out the memory of the last expression evaluated. */
void
clear_last_expr ()
{
last_expr_type = 0;
}
/* Begin a statement which will return a value.
Return the RTL_EXPR for this statement expr.
The caller must save that value and pass it to expand_end_stmt_expr. */
tree
expand_start_stmt_expr ()
{
tree t;
/* Make the RTL_EXPR node temporary, not momentary,
so that rtl_expr_chain doesn't become garbage. */
t = make_node (RTL_EXPR);
do_pending_stack_adjust ();
start_sequence_for_rtl_expr (t);
NO_DEFER_POP;
expr_stmts_for_value++;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
last_expr_value = NULL_RTX;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return t;
}
/* Restore the previous state at the end of a statement that returns a value.
Returns a tree node representing the statement's value and the
insns to compute the value.
The nodes of that expression have been freed by now, so we cannot use them.
But we don't want to do that anyway; the expression has already been
evaluated and now we just want to use the value. So generate a RTL_EXPR
with the proper type and RTL value.
If the last substatement was not an expression,
return something with type `void'. */
tree
expand_end_stmt_expr (t)
tree t;
{
OK_DEFER_POP;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! last_expr_value || ! last_expr_type)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
last_expr_value = const0_rtx;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
last_expr_type = void_type_node;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
else if (GET_CODE (last_expr_value) != REG && ! CONSTANT_P (last_expr_value))
/* Remove any possible QUEUED. */
last_expr_value = protect_from_queue (last_expr_value, 0);
emit_queue ();
TREE_TYPE (t) = last_expr_type;
RTL_EXPR_RTL (t) = last_expr_value;
RTL_EXPR_SEQUENCE (t) = get_insns ();
rtl_expr_chain = tree_cons (NULL_TREE, t, rtl_expr_chain);
end_sequence ();
/* Don't consider deleting this expr or containing exprs at tree level. */
TREE_SIDE_EFFECTS (t) = 1;
/* Propagate volatility of the actual RTL expr. */
TREE_THIS_VOLATILE (t) = volatile_refs_p (last_expr_value);
last_expr_type = 0;
expr_stmts_for_value--;
return t;
}
/* Generate RTL for the start of an if-then. COND is the expression
whose truth should be tested.
If EXITFLAG is nonzero, this conditional is visible to
`exit_something'. */
void
expand_start_cond (cond, exitflag)
tree cond;
int exitflag;
{
struct nesting *thiscond = ALLOC_NESTING ();
/* Make an entry on cond_stack for the cond we are entering. */
thiscond->next = cond_stack;
thiscond->all = nesting_stack;
thiscond->depth = ++nesting_depth;
thiscond->data.cond.next_label = gen_label_rtx ();
/* Before we encounter an `else', we don't need a separate exit label
unless there are supposed to be exit statements
to exit this conditional. */
thiscond->exit_label = exitflag ? gen_label_rtx () : 0;
thiscond->data.cond.endif_label = thiscond->exit_label;
cond_stack = thiscond;
nesting_stack = thiscond;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
do_jump (cond, thiscond->data.cond.next_label, NULL_RTX);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Generate RTL between then-clause and the elseif-clause
of an if-then-elseif-.... */
void
expand_start_elseif (cond)
tree cond;
{
if (cond_stack->data.cond.endif_label == 0)
cond_stack->data.cond.endif_label = gen_label_rtx ();
emit_jump (cond_stack->data.cond.endif_label);
emit_label (cond_stack->data.cond.next_label);
cond_stack->data.cond.next_label = gen_label_rtx ();
do_jump (cond, cond_stack->data.cond.next_label, NULL_RTX);
}
/* Generate RTL between the then-clause and the else-clause
of an if-then-else. */
void
expand_start_else ()
{
if (cond_stack->data.cond.endif_label == 0)
cond_stack->data.cond.endif_label = gen_label_rtx ();
emit_jump (cond_stack->data.cond.endif_label);
emit_label (cond_stack->data.cond.next_label);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
cond_stack->data.cond.next_label = 0; /* No more _else or _elseif calls. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* After calling expand_start_else, turn this "else" into an "else if"
by providing another condition. */
void
expand_elseif (cond)
tree cond;
{
cond_stack->data.cond.next_label = gen_label_rtx ();
do_jump (cond, cond_stack->data.cond.next_label, NULL_RTX);
}
/* Generate RTL for the end of an if-then.
Pop the record for it off of cond_stack. */
void
expand_end_cond ()
{
struct nesting *thiscond = cond_stack;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
do_pending_stack_adjust ();
if (thiscond->data.cond.next_label)
emit_label (thiscond->data.cond.next_label);
if (thiscond->data.cond.endif_label)
emit_label (thiscond->data.cond.endif_label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
POPSTACK (cond_stack);
last_expr_type = 0;
}
/* Generate RTL for the start of a loop. EXIT_FLAG is nonzero if this
loop should be exited by `exit_something'. This is a loop for which
`expand_continue' will jump to the top of the loop.
Make an entry on loop_stack to record the labels associated with
this loop. */
struct nesting *
expand_start_loop (exit_flag)
int exit_flag;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct nesting *thisloop = ALLOC_NESTING ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Make an entry on loop_stack for the loop we are entering. */
thisloop->next = loop_stack;
thisloop->all = nesting_stack;
thisloop->depth = ++nesting_depth;
thisloop->data.loop.start_label = gen_label_rtx ();
thisloop->data.loop.end_label = gen_label_rtx ();
thisloop->data.loop.alt_end_label = 0;
thisloop->data.loop.continue_label = thisloop->data.loop.start_label;
thisloop->exit_label = exit_flag ? thisloop->data.loop.end_label : 0;
loop_stack = thisloop;
nesting_stack = thisloop;
do_pending_stack_adjust ();
emit_queue ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_note (NULL, NOTE_INSN_LOOP_BEG);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_label (thisloop->data.loop.start_label);
return thisloop;
}
/* Like expand_start_loop but for a loop where the continuation point
(for expand_continue_loop) will be specified explicitly. */
struct nesting *
expand_start_loop_continue_elsewhere (exit_flag)
int exit_flag;
{
struct nesting *thisloop = expand_start_loop (exit_flag);
loop_stack->data.loop.continue_label = gen_label_rtx ();
return thisloop;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Begin a null, aka do { } while (0) "loop". But since the contents
of said loop can still contain a break, we must frob the loop nest. */
struct nesting *
expand_start_null_loop ()
{
struct nesting *thisloop = ALLOC_NESTING ();
/* Make an entry on loop_stack for the loop we are entering. */
thisloop->next = loop_stack;
thisloop->all = nesting_stack;
thisloop->depth = ++nesting_depth;
thisloop->data.loop.start_label = emit_note (NULL, NOTE_INSN_DELETED);
thisloop->data.loop.end_label = gen_label_rtx ();
thisloop->data.loop.alt_end_label = NULL_RTX;
thisloop->data.loop.continue_label = thisloop->data.loop.end_label;
thisloop->exit_label = thisloop->data.loop.end_label;
loop_stack = thisloop;
nesting_stack = thisloop;
return thisloop;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Specify the continuation point for a loop started with
expand_start_loop_continue_elsewhere.
Use this at the point in the code to which a continue statement
should jump. */
void
expand_loop_continue_here ()
{
do_pending_stack_adjust ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_note (NULL, NOTE_INSN_LOOP_CONT);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_label (loop_stack->data.loop.continue_label);
}
/* Finish a loop. Generate a jump back to the top and the loop-exit label.
Pop the block off of loop_stack. */
void
expand_end_loop ()
{
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
rtx start_label = loop_stack->data.loop.start_label;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx etc_note;
int eh_regions, debug_blocks;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Mark the continue-point at the top of the loop if none elsewhere. */
if (start_label == loop_stack->data.loop.continue_label)
emit_note_before (NOTE_INSN_LOOP_CONT, start_label);
do_pending_stack_adjust ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If the loop starts with a loop exit, roll that to the end where
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
it will optimize together with the jump back.
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
If the loop presently looks like this (in pseudo-C):
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
LOOP_BEG
start_label:
if (test) goto end_label;
LOOP_END_TOP_COND
body;
goto start_label;
end_label:
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
transform it to look like:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
LOOP_BEG
goto start_label;
top_label:
body;
start_label:
if (test) goto end_label;
goto top_label;
end_label:
We rely on the presence of NOTE_INSN_LOOP_END_TOP_COND to mark
the end of the entry condtional. Without this, our lexical scan
can't tell the difference between an entry conditional and a
body conditional that exits the loop. Mistaking the two means
that we can misplace the NOTE_INSN_LOOP_CONT note, which can
screw up loop unrolling.
Things will be oh so much better when loop optimization is done
off of a proper control flow graph... */
/* Scan insns from the top of the loop looking for the END_TOP_COND note. */
eh_regions = debug_blocks = 0;
for (etc_note = start_label; etc_note ; etc_note = NEXT_INSN (etc_note))
if (GET_CODE (etc_note) == NOTE)
{
if (NOTE_LINE_NUMBER (etc_note) == NOTE_INSN_LOOP_END_TOP_COND)
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* We must not walk into a nested loop. */
else if (NOTE_LINE_NUMBER (etc_note) == NOTE_INSN_LOOP_BEG)
{
etc_note = NULL_RTX;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
break;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* At the same time, scan for EH region notes, as we don't want
to scrog region nesting. This shouldn't happen, but... */
else if (NOTE_LINE_NUMBER (etc_note) == NOTE_INSN_EH_REGION_BEG)
eh_regions++;
else if (NOTE_LINE_NUMBER (etc_note) == NOTE_INSN_EH_REGION_END)
{
if (--eh_regions < 0)
/* We've come to the end of an EH region, but never saw the
beginning of that region. That means that an EH region
begins before the top of the loop, and ends in the middle
of it. The existence of such a situation violates a basic
assumption in this code, since that would imply that even
when EH_REGIONS is zero, we might move code out of an
exception region. */
abort ();
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Likewise for debug scopes. In this case we'll either (1) move
all of the notes if they are properly nested or (2) leave the
notes alone and only rotate the loop at high optimization
levels when we expect to scrog debug info. */
else if (NOTE_LINE_NUMBER (etc_note) == NOTE_INSN_BLOCK_BEG)
debug_blocks++;
else if (NOTE_LINE_NUMBER (etc_note) == NOTE_INSN_BLOCK_END)
debug_blocks--;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (etc_note
&& optimize
&& eh_regions == 0
&& (debug_blocks == 0 || optimize >= 2)
&& NEXT_INSN (etc_note) != NULL_RTX
&& ! any_condjump_p (get_last_insn ()))
{
/* We found one. Move everything from START to ETC to the end
of the loop, and add a jump from the top of the loop. */
rtx top_label = gen_label_rtx ();
rtx start_move = start_label;
/* If the start label is preceded by a NOTE_INSN_LOOP_CONT note,
then we want to move this note also. */
if (GET_CODE (PREV_INSN (start_move)) == NOTE
&& NOTE_LINE_NUMBER (PREV_INSN (start_move)) == NOTE_INSN_LOOP_CONT)
start_move = PREV_INSN (start_move);
emit_label_before (top_label, start_move);
/* Actually move the insns. If the debug scopes are nested, we
can move everything at once. Otherwise we have to move them
one by one and squeeze out the block notes. */
if (debug_blocks == 0)
reorder_insns (start_move, etc_note, get_last_insn ());
else
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx insn, next_insn;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
for (insn = start_move; insn; insn = next_insn)
{
/* Figure out which insn comes after this one. We have
to do this before we move INSN. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
next_insn = (insn == etc_note ? NULL : NEXT_INSN (insn));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (GET_CODE (insn) == NOTE
&& (NOTE_LINE_NUMBER (insn) == NOTE_INSN_BLOCK_BEG
|| NOTE_LINE_NUMBER (insn) == NOTE_INSN_BLOCK_END))
continue;
reorder_insns (insn, insn, get_last_insn ());
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Add the jump from the top of the loop. */
emit_jump_insn_before (gen_jump (start_label), top_label);
emit_barrier_before (top_label);
start_label = top_label;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_jump (start_label);
emit_note (NULL, NOTE_INSN_LOOP_END);
emit_label (loop_stack->data.loop.end_label);
POPSTACK (loop_stack);
last_expr_type = 0;
}
/* Finish a null loop, aka do { } while (0). */
void
expand_end_null_loop ()
{
do_pending_stack_adjust ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_label (loop_stack->data.loop.end_label);
POPSTACK (loop_stack);
last_expr_type = 0;
}
/* Generate a jump to the current loop's continue-point.
This is usually the top of the loop, but may be specified
explicitly elsewhere. If not currently inside a loop,
return 0 and do nothing; caller will print an error message. */
int
expand_continue_loop (whichloop)
struct nesting *whichloop;
{
last_expr_type = 0;
if (whichloop == 0)
whichloop = loop_stack;
if (whichloop == 0)
return 0;
expand_goto_internal (NULL_TREE, whichloop->data.loop.continue_label,
NULL_RTX);
return 1;
}
/* Generate a jump to exit the current loop. If not currently inside a loop,
return 0 and do nothing; caller will print an error message. */
int
expand_exit_loop (whichloop)
struct nesting *whichloop;
{
last_expr_type = 0;
if (whichloop == 0)
whichloop = loop_stack;
if (whichloop == 0)
return 0;
expand_goto_internal (NULL_TREE, whichloop->data.loop.end_label, NULL_RTX);
return 1;
}
/* Generate a conditional jump to exit the current loop if COND
evaluates to zero. If not currently inside a loop,
return 0 and do nothing; caller will print an error message. */
int
expand_exit_loop_if_false (whichloop, cond)
struct nesting *whichloop;
tree cond;
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rtx label = gen_label_rtx ();
rtx last_insn;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
last_expr_type = 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (whichloop == 0)
whichloop = loop_stack;
if (whichloop == 0)
return 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* In order to handle fixups, we actually create a conditional jump
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
around an unconditional branch to exit the loop. If fixups are
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
necessary, they go before the unconditional branch. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
do_jump (cond, NULL_RTX, label);
last_insn = get_last_insn ();
if (GET_CODE (last_insn) == CODE_LABEL)
whichloop->data.loop.alt_end_label = last_insn;
expand_goto_internal (NULL_TREE, whichloop->data.loop.end_label,
NULL_RTX);
emit_label (label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 1;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Like expand_exit_loop_if_false except also emit a note marking
the end of the conditional. Should only be used immediately
after expand_loop_start. */
int
expand_exit_loop_top_cond (whichloop, cond)
struct nesting *whichloop;
tree cond;
{
if (! expand_exit_loop_if_false (whichloop, cond))
return 0;
emit_note (NULL, NOTE_INSN_LOOP_END_TOP_COND);
return 1;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Return nonzero if the loop nest is empty. Else return zero. */
int
stmt_loop_nest_empty ()
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* cfun->stmt can be NULL if we are building a call to get the
EH context for a setjmp/longjmp EH target and the current
function was a deferred inline function. */
return (cfun->stmt == NULL || loop_stack == NULL);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Return non-zero if we should preserve sub-expressions as separate
pseudos. We never do so if we aren't optimizing. We always do so
if -fexpensive-optimizations.
Otherwise, we only do so if we are in the "early" part of a loop. I.e.,
the loop may still be a small one. */
int
preserve_subexpressions_p ()
{
rtx insn;
if (flag_expensive_optimizations)
return 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (optimize == 0 || cfun == 0 || cfun->stmt == 0 || loop_stack == 0)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 0;
insn = get_last_insn_anywhere ();
return (insn
&& (INSN_UID (insn) - INSN_UID (loop_stack->data.loop.start_label)
< n_non_fixed_regs * 3));
}
/* Generate a jump to exit the current loop, conditional, binding contour
or case statement. Not all such constructs are visible to this function,
only those started with EXIT_FLAG nonzero. Individual languages use
the EXIT_FLAG parameter to control which kinds of constructs you can
exit this way.
If not currently inside anything that can be exited,
return 0 and do nothing; caller will print an error message. */
int
expand_exit_something ()
{
struct nesting *n;
last_expr_type = 0;
for (n = nesting_stack; n; n = n->all)
if (n->exit_label != 0)
{
expand_goto_internal (NULL_TREE, n->exit_label, NULL_RTX);
return 1;
}
return 0;
}
/* Generate RTL to return from the current function, with no value.
(That is, we do not do anything about returning any value.) */
void
expand_null_return ()
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx last_insn = get_last_insn ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If this function was declared to return a value, but we
didn't, clobber the return registers so that they are not
propagated live to the rest of the function. */
clobber_return_register ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
expand_null_return_1 (last_insn);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Generate RTL to return from the current function, with value VAL. */
static void
expand_value_return (val)
rtx val;
{
rtx last_insn = get_last_insn ();
rtx return_reg = DECL_RTL (DECL_RESULT (current_function_decl));
/* Copy the value to the return location
unless it's already there. */
if (return_reg != val)
{
tree type = TREE_TYPE (DECL_RESULT (current_function_decl));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#ifdef PROMOTE_FUNCTION_RETURN
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
int unsignedp = TREE_UNSIGNED (type);
Bring in bug fixes from the GCC anoncvs server's "gcc-2_95-branch" branch on Jan 20th, 2000.
2000-01-22 02:59:08 +00:00
enum machine_mode old_mode
= DECL_MODE (DECL_RESULT (current_function_decl));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
enum machine_mode mode
Bring in bug fixes from the GCC anoncvs server's "gcc-2_95-branch" branch on Jan 20th, 2000.
2000-01-22 02:59:08 +00:00
= promote_mode (type, old_mode, &unsignedp, 1);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Bring in bug fixes from the GCC anoncvs server's "gcc-2_95-branch" branch on Jan 20th, 2000.
2000-01-22 02:59:08 +00:00
if (mode != old_mode)
val = convert_modes (mode, old_mode, val, unsignedp);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#endif
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (GET_CODE (return_reg) == PARALLEL)
emit_group_load (return_reg, val, int_size_in_bytes (type));
else
emit_move_insn (return_reg, val);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
expand_null_return_1 (last_insn);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Output a return with no value. If LAST_INSN is nonzero,
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
pretend that the return takes place after LAST_INSN. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
static void
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
expand_null_return_1 (last_insn)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx last_insn;
{
rtx end_label = cleanup_label ? cleanup_label : return_label;
clear_pending_stack_adjust ();
do_pending_stack_adjust ();
last_expr_type = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (end_label == 0)
end_label = return_label = gen_label_rtx ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
expand_goto_internal (NULL_TREE, end_label, last_insn);
}
/* Generate RTL to evaluate the expression RETVAL and return it
from the current function. */
void
expand_return (retval)
tree retval;
{
/* If there are any cleanups to be performed, then they will
be inserted following LAST_INSN. It is desirable
that the last_insn, for such purposes, should be the
last insn before computing the return value. Otherwise, cleanups
which call functions can clobber the return value. */
/* ??? rms: I think that is erroneous, because in C++ it would
run destructors on variables that might be used in the subsequent
computation of the return value. */
rtx last_insn = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx result_rtl;
rtx val = 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree retval_rhs;
/* If function wants no value, give it none. */
if (TREE_CODE (TREE_TYPE (TREE_TYPE (current_function_decl))) == VOID_TYPE)
{
expand_expr (retval, NULL_RTX, VOIDmode, 0);
emit_queue ();
expand_null_return ();
return;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (retval == error_mark_node)
{
/* Treat this like a return of no value from a function that
returns a value. */
expand_null_return ();
return;
}
else if (TREE_CODE (retval) == RESULT_DECL)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
retval_rhs = retval;
else if ((TREE_CODE (retval) == MODIFY_EXPR || TREE_CODE (retval) == INIT_EXPR)
&& TREE_CODE (TREE_OPERAND (retval, 0)) == RESULT_DECL)
retval_rhs = TREE_OPERAND (retval, 1);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (VOID_TYPE_P (TREE_TYPE (retval)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Recognize tail-recursive call to void function. */
retval_rhs = retval;
else
retval_rhs = NULL_TREE;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
last_insn = get_last_insn ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Distribute return down conditional expr if either of the sides
may involve tail recursion (see test below). This enhances the number
of tail recursions we see. Don't do this always since it can produce
sub-optimal code in some cases and we distribute assignments into
conditional expressions when it would help. */
if (optimize && retval_rhs != 0
&& frame_offset == 0
&& TREE_CODE (retval_rhs) == COND_EXPR
&& (TREE_CODE (TREE_OPERAND (retval_rhs, 1)) == CALL_EXPR
|| TREE_CODE (TREE_OPERAND (retval_rhs, 2)) == CALL_EXPR))
{
rtx label = gen_label_rtx ();
tree expr;
do_jump (TREE_OPERAND (retval_rhs, 0), label, NULL_RTX);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
start_cleanup_deferral ();
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
expr = build (MODIFY_EXPR, TREE_TYPE (TREE_TYPE (current_function_decl)),
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
DECL_RESULT (current_function_decl),
TREE_OPERAND (retval_rhs, 1));
TREE_SIDE_EFFECTS (expr) = 1;
expand_return (expr);
emit_label (label);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
expr = build (MODIFY_EXPR, TREE_TYPE (TREE_TYPE (current_function_decl)),
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
DECL_RESULT (current_function_decl),
TREE_OPERAND (retval_rhs, 2));
TREE_SIDE_EFFECTS (expr) = 1;
expand_return (expr);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
end_cleanup_deferral ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
result_rtl = DECL_RTL (DECL_RESULT (current_function_decl));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If the result is an aggregate that is being returned in one (or more)
registers, load the registers here. The compiler currently can't handle
copying a BLKmode value into registers. We could put this code in a
more general area (for use by everyone instead of just function
call/return), but until this feature is generally usable it is kept here
(and in expand_call). The value must go into a pseudo in case there
are cleanups that will clobber the real return register. */
if (retval_rhs != 0
&& TYPE_MODE (TREE_TYPE (retval_rhs)) == BLKmode
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& GET_CODE (result_rtl) == REG)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int i;
unsigned HOST_WIDE_INT bitpos, xbitpos;
unsigned HOST_WIDE_INT big_endian_correction = 0;
unsigned HOST_WIDE_INT bytes
= int_size_in_bytes (TREE_TYPE (retval_rhs));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
int n_regs = (bytes + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
unsigned int bitsize
= MIN (TYPE_ALIGN (TREE_TYPE (retval_rhs)), BITS_PER_WORD);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx *result_pseudos = (rtx *) alloca (sizeof (rtx) * n_regs);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rtx result_reg, src = NULL_RTX, dst = NULL_RTX;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx result_val = expand_expr (retval_rhs, NULL_RTX, VOIDmode, 0);
enum machine_mode tmpmode, result_reg_mode;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (bytes == 0)
{
expand_null_return ();
return;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Structures whose size is not a multiple of a word are aligned
to the least significant byte (to the right). On a BYTES_BIG_ENDIAN
machine, this means we must skip the empty high order bytes when
calculating the bit offset. */
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2002-02-01 18:16:02 +00:00
if (BYTES_BIG_ENDIAN
&& !FUNCTION_ARG_REG_LITTLE_ENDIAN
&& bytes % UNITS_PER_WORD)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
big_endian_correction = (BITS_PER_WORD - ((bytes % UNITS_PER_WORD)
* BITS_PER_UNIT));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Copy the structure BITSIZE bits at a time. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (bitpos = 0, xbitpos = big_endian_correction;
bitpos < bytes * BITS_PER_UNIT;
bitpos += bitsize, xbitpos += bitsize)
{
/* We need a new destination pseudo each time xbitpos is
on a word boundary and when xbitpos == big_endian_correction
(the first time through). */
if (xbitpos % BITS_PER_WORD == 0
|| xbitpos == big_endian_correction)
{
/* Generate an appropriate register. */
dst = gen_reg_rtx (word_mode);
result_pseudos[xbitpos / BITS_PER_WORD] = dst;
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2002-02-01 18:16:02 +00:00
/* Clear the destination before we move anything into it. */
emit_move_insn (dst, CONST0_RTX (GET_MODE (dst)));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* We need a new source operand each time bitpos is on a word
boundary. */
if (bitpos % BITS_PER_WORD == 0)
src = operand_subword_force (result_val,
bitpos / BITS_PER_WORD,
BLKmode);
/* Use bitpos for the source extraction (left justified) and
xbitpos for the destination store (right justified). */
store_bit_field (dst, bitsize, xbitpos % BITS_PER_WORD, word_mode,
extract_bit_field (src, bitsize,
bitpos % BITS_PER_WORD, 1,
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2002-02-01 18:16:02 +00:00
NULL_RTX, word_mode, word_mode,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
BITS_PER_WORD),
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2002-02-01 18:16:02 +00:00
BITS_PER_WORD);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Find the smallest integer mode large enough to hold the
entire structure and use that mode instead of BLKmode
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2002-02-01 18:16:02 +00:00
on the USE insn for the return register. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (tmpmode = GET_CLASS_NARROWEST_MODE (MODE_INT);
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2002-02-01 18:16:02 +00:00
tmpmode != VOIDmode;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tmpmode = GET_MODE_WIDER_MODE (tmpmode))
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2002-02-01 18:16:02 +00:00
/* Have we found a large enough mode? */
if (GET_MODE_SIZE (tmpmode) >= bytes)
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* No suitable mode found. */
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2002-02-01 18:16:02 +00:00
if (tmpmode == VOIDmode)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
abort ();
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2002-02-01 18:16:02 +00:00
PUT_MODE (result_rtl, tmpmode);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (GET_MODE_SIZE (tmpmode) < GET_MODE_SIZE (word_mode))
result_reg_mode = word_mode;
else
result_reg_mode = tmpmode;
result_reg = gen_reg_rtx (result_reg_mode);
emit_queue ();
for (i = 0; i < n_regs; i++)
emit_move_insn (operand_subword (result_reg, i, 0, result_reg_mode),
result_pseudos[i]);
if (tmpmode != result_reg_mode)
result_reg = gen_lowpart (tmpmode, result_reg);
expand_value_return (result_reg);
}
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2002-02-01 18:16:02 +00:00
else if (retval_rhs != 0
&& !VOID_TYPE_P (TREE_TYPE (retval_rhs))
&& (GET_CODE (result_rtl) == REG
|| (GET_CODE (result_rtl) == PARALLEL)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
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2002-02-01 18:16:02 +00:00
/* Calculate the return value into a temporary (usually a pseudo
reg). */
tree ot = TREE_TYPE (DECL_RESULT (current_function_decl));
tree nt = build_qualified_type (ot, TYPE_QUALS (ot) | TYPE_QUAL_CONST);
val = assign_temp (nt, 0, 0, 1);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
val = expand_expr (retval_rhs, val, GET_MODE (val), 0);
val = force_not_mem (val);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_queue ();
/* Return the calculated value, doing cleanups first. */
expand_value_return (val);
}
else
{
/* No cleanups or no hard reg used;
calculate value into hard return reg. */
expand_expr (retval, const0_rtx, VOIDmode, 0);
emit_queue ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
expand_value_return (result_rtl);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
/* Return 1 if the end of the generated RTX is not a barrier.
This means code already compiled can drop through. */
int
drop_through_at_end_p ()
{
rtx insn = get_last_insn ();
while (insn && GET_CODE (insn) == NOTE)
insn = PREV_INSN (insn);
return insn && GET_CODE (insn) != BARRIER;
}
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2002-02-01 18:16:02 +00:00
/* Attempt to optimize a potential tail recursion call into a goto.
ARGUMENTS are the arguments to a CALL_EXPR; LAST_INSN indicates
where to place the jump to the tail recursion label.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
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2002-02-01 18:16:02 +00:00
Return TRUE if the call was optimized into a goto. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
int
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2002-02-01 18:16:02 +00:00
optimize_tail_recursion (arguments, last_insn)
tree arguments;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
rtx last_insn;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Finish checking validity, and if valid emit code to set the
argument variables for the new call. */
if (tail_recursion_args (arguments, DECL_ARGUMENTS (current_function_decl)))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
if (tail_recursion_label == 0)
{
tail_recursion_label = gen_label_rtx ();
emit_label_after (tail_recursion_label,
tail_recursion_reentry);
}
emit_queue ();
expand_goto_internal (NULL_TREE, tail_recursion_label, last_insn);
emit_barrier ();
return 1;
}
return 0;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Emit code to alter this function's formal parms for a tail-recursive call.
ACTUALS is a list of actual parameter expressions (chain of TREE_LISTs).
FORMALS is the chain of decls of formals.
Return 1 if this can be done;
otherwise return 0 and do not emit any code. */
static int
tail_recursion_args (actuals, formals)
tree actuals, formals;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tree a = actuals, f = formals;
int i;
rtx *argvec;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Check that number and types of actuals are compatible
with the formals. This is not always true in valid C code.
Also check that no formal needs to be addressable
and that all formals are scalars. */
/* Also count the args. */
for (a = actuals, f = formals, i = 0; a && f; a = TREE_CHAIN (a), f = TREE_CHAIN (f), i++)
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (a)))
!= TYPE_MAIN_VARIANT (TREE_TYPE (f)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 0;
if (GET_CODE (DECL_RTL (f)) != REG || DECL_MODE (f) == BLKmode)
return 0;
}
if (a != 0 || f != 0)
return 0;
/* Compute all the actuals. */
argvec = (rtx *) alloca (i * sizeof (rtx));
for (a = actuals, i = 0; a; a = TREE_CHAIN (a), i++)
argvec[i] = expand_expr (TREE_VALUE (a), NULL_RTX, VOIDmode, 0);
/* Find which actual values refer to current values of previous formals.
Copy each of them now, before any formal is changed. */
for (a = actuals, i = 0; a; a = TREE_CHAIN (a), i++)
{
int copy = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int j;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (f = formals, j = 0; j < i; f = TREE_CHAIN (f), j++)
if (reg_mentioned_p (DECL_RTL (f), argvec[i]))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
copy = 1;
break;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (copy)
argvec[i] = copy_to_reg (argvec[i]);
}
/* Store the values of the actuals into the formals. */
for (f = formals, a = actuals, i = 0; f;
f = TREE_CHAIN (f), a = TREE_CHAIN (a), i++)
{
if (GET_MODE (DECL_RTL (f)) == GET_MODE (argvec[i]))
emit_move_insn (DECL_RTL (f), argvec[i]);
else
convert_move (DECL_RTL (f), argvec[i],
TREE_UNSIGNED (TREE_TYPE (TREE_VALUE (a))));
}
free_temp_slots ();
return 1;
}
/* Generate the RTL code for entering a binding contour.
The variables are declared one by one, by calls to `expand_decl'.
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2002-02-01 18:16:02 +00:00
FLAGS is a bitwise or of the following flags:
1 - Nonzero if this construct should be visible to
`exit_something'.
2 - Nonzero if this contour does not require a
NOTE_INSN_BLOCK_BEG note. Virtually all calls from
language-independent code should set this flag because they
will not create corresponding BLOCK nodes. (There should be
a one-to-one correspondence between NOTE_INSN_BLOCK_BEG notes
and BLOCKs.) If this flag is set, MARK_ENDS should be zero
when expand_end_bindings is called.
If we are creating a NOTE_INSN_BLOCK_BEG note, a BLOCK may
optionally be supplied. If so, it becomes the NOTE_BLOCK for the
note. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
void
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2002-02-01 18:16:02 +00:00
expand_start_bindings_and_block (flags, block)
int flags;
tree block;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
struct nesting *thisblock = ALLOC_NESTING ();
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2002-02-01 18:16:02 +00:00
rtx note;
int exit_flag = ((flags & 1) != 0);
int block_flag = ((flags & 2) == 0);
/* If a BLOCK is supplied, then the caller should be requesting a
NOTE_INSN_BLOCK_BEG note. */
if (!block_flag && block)
abort ();
/* Create a note to mark the beginning of the block. */
if (block_flag)
{
note = emit_note (NULL, NOTE_INSN_BLOCK_BEG);
NOTE_BLOCK (note) = block;
}
else
note = emit_note (NULL, NOTE_INSN_DELETED);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Make an entry on block_stack for the block we are entering. */
thisblock->next = block_stack;
thisblock->all = nesting_stack;
thisblock->depth = ++nesting_depth;
thisblock->data.block.stack_level = 0;
thisblock->data.block.cleanups = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
thisblock->data.block.n_function_calls = 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
thisblock->data.block.exception_region = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
thisblock->data.block.block_target_temp_slot_level = target_temp_slot_level;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
thisblock->data.block.conditional_code = 0;
thisblock->data.block.last_unconditional_cleanup = note;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* When we insert instructions after the last unconditional cleanup,
we don't adjust last_insn. That means that a later add_insn will
clobber the instructions we've just added. The easiest way to
fix this is to just insert another instruction here, so that the
instructions inserted after the last unconditional cleanup are
never the last instruction. */
emit_note (NULL, NOTE_INSN_DELETED);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
thisblock->data.block.cleanup_ptr = &thisblock->data.block.cleanups;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (block_stack
&& !(block_stack->data.block.cleanups == NULL_TREE
&& block_stack->data.block.outer_cleanups == NULL_TREE))
thisblock->data.block.outer_cleanups
= tree_cons (NULL_TREE, block_stack->data.block.cleanups,
block_stack->data.block.outer_cleanups);
else
thisblock->data.block.outer_cleanups = 0;
thisblock->data.block.label_chain = 0;
thisblock->data.block.innermost_stack_block = stack_block_stack;
thisblock->data.block.first_insn = note;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
thisblock->data.block.block_start_count = ++current_block_start_count;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
thisblock->exit_label = exit_flag ? gen_label_rtx () : 0;
block_stack = thisblock;
nesting_stack = thisblock;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Make a new level for allocating stack slots. */
push_temp_slots ();
}
/* Specify the scope of temporaries created by TARGET_EXPRs. Similar
to CLEANUP_POINT_EXPR, but handles cases when a series of calls to
expand_expr are made. After we end the region, we know that all
space for all temporaries that were created by TARGET_EXPRs will be
destroyed and their space freed for reuse. */
void
expand_start_target_temps ()
{
/* This is so that even if the result is preserved, the space
allocated will be freed, as we know that it is no longer in use. */
push_temp_slots ();
/* Start a new binding layer that will keep track of all cleanup
actions to be performed. */
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2002-02-01 18:16:02 +00:00
expand_start_bindings (2);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
target_temp_slot_level = temp_slot_level;
}
void
expand_end_target_temps ()
{
expand_end_bindings (NULL_TREE, 0, 0);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* This is so that even if the result is preserved, the space
allocated will be freed, as we know that it is no longer in use. */
pop_temp_slots ();
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Given a pointer to a BLOCK node return non-zero if (and only if) the node
in question represents the outermost pair of curly braces (i.e. the "body
block") of a function or method.
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
For any BLOCK node representing a "body block" of a function or method, the
BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
represents the outermost (function) scope for the function or method (i.e.
the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
*that* node in turn will point to the relevant FUNCTION_DECL node. */
int
is_body_block (stmt)
tree stmt;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (TREE_CODE (stmt) == BLOCK)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
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2002-02-01 18:16:02 +00:00
tree parent = BLOCK_SUPERCONTEXT (stmt);
if (parent && TREE_CODE (parent) == BLOCK)
{
tree grandparent = BLOCK_SUPERCONTEXT (parent);
if (grandparent && TREE_CODE (grandparent) == FUNCTION_DECL)
return 1;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* True if we are currently emitting insns in an area of output code
that is controlled by a conditional expression. This is used by
the cleanup handling code to generate conditional cleanup actions. */
int
conditional_context ()
{
return block_stack && block_stack->data.block.conditional_code;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Return an opaque pointer to the current nesting level, so frontend code
can check its own sanity. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
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2002-02-01 18:16:02 +00:00
struct nesting *
current_nesting_level ()
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
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2002-02-01 18:16:02 +00:00
return cfun ? block_stack : 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Emit a handler label for a nonlocal goto handler.
Also emit code to store the handler label in SLOT before BEFORE_INSN. */
static rtx
expand_nl_handler_label (slot, before_insn)
rtx slot, before_insn;
{
rtx insns;
rtx handler_label = gen_label_rtx ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Don't let cleanup_cfg delete the handler. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
LABEL_PRESERVE_P (handler_label) = 1;
start_sequence ();
emit_move_insn (slot, gen_rtx_LABEL_REF (Pmode, handler_label));
insns = get_insns ();
end_sequence ();
emit_insns_before (insns, before_insn);
emit_label (handler_label);
return handler_label;
}
/* Emit code to restore vital registers at the beginning of a nonlocal goto
handler. */
static void
expand_nl_goto_receiver ()
{
#ifdef HAVE_nonlocal_goto
if (! HAVE_nonlocal_goto)
#endif
/* First adjust our frame pointer to its actual value. It was
previously set to the start of the virtual area corresponding to
the stacked variables when we branched here and now needs to be
adjusted to the actual hardware fp value.
Assignments are to virtual registers are converted by
instantiate_virtual_regs into the corresponding assignment
to the underlying register (fp in this case) that makes
the original assignment true.
So the following insn will actually be
decrementing fp by STARTING_FRAME_OFFSET. */
emit_move_insn (virtual_stack_vars_rtx, hard_frame_pointer_rtx);
#if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
if (fixed_regs[ARG_POINTER_REGNUM])
{
#ifdef ELIMINABLE_REGS
/* If the argument pointer can be eliminated in favor of the
frame pointer, we don't need to restore it. We assume here
that if such an elimination is present, it can always be used.
This is the case on all known machines; if we don't make this
assumption, we do unnecessary saving on many machines. */
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2002-02-01 18:16:02 +00:00
static const struct elims {const int from, to;} elim_regs[] = ELIMINABLE_REGS;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
size_t i;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (i = 0; i < ARRAY_SIZE (elim_regs); i++)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (elim_regs[i].from == ARG_POINTER_REGNUM
&& elim_regs[i].to == HARD_FRAME_POINTER_REGNUM)
break;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (i == ARRAY_SIZE (elim_regs))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
#endif
{
/* Now restore our arg pointer from the address at which it
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
was saved in our stack frame. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
emit_move_insn (virtual_incoming_args_rtx,
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
copy_to_reg (get_arg_pointer_save_area (cfun)));
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
}
#endif
#ifdef HAVE_nonlocal_goto_receiver
if (HAVE_nonlocal_goto_receiver)
emit_insn (gen_nonlocal_goto_receiver ());
#endif
}
/* Make handlers for nonlocal gotos taking place in the function calls in
block THISBLOCK. */
static void
expand_nl_goto_receivers (thisblock)
struct nesting *thisblock;
{
tree link;
rtx afterward = gen_label_rtx ();
rtx insns, slot;
rtx label_list;
int any_invalid;
/* Record the handler address in the stack slot for that purpose,
during this block, saving and restoring the outer value. */
if (thisblock->next != 0)
for (slot = nonlocal_goto_handler_slots; slot; slot = XEXP (slot, 1))
{
rtx save_receiver = gen_reg_rtx (Pmode);
emit_move_insn (XEXP (slot, 0), save_receiver);
start_sequence ();
emit_move_insn (save_receiver, XEXP (slot, 0));
insns = get_insns ();
end_sequence ();
emit_insns_before (insns, thisblock->data.block.first_insn);
}
/* Jump around the handlers; they run only when specially invoked. */
emit_jump (afterward);
/* Make a separate handler for each label. */
link = nonlocal_labels;
slot = nonlocal_goto_handler_slots;
label_list = NULL_RTX;
for (; link; link = TREE_CHAIN (link), slot = XEXP (slot, 1))
/* Skip any labels we shouldn't be able to jump to from here,
we generate one special handler for all of them below which just calls
abort. */
if (! DECL_TOO_LATE (TREE_VALUE (link)))
{
rtx lab;
lab = expand_nl_handler_label (XEXP (slot, 0),
thisblock->data.block.first_insn);
label_list = gen_rtx_EXPR_LIST (VOIDmode, lab, label_list);
expand_nl_goto_receiver ();
/* Jump to the "real" nonlocal label. */
expand_goto (TREE_VALUE (link));
}
/* A second pass over all nonlocal labels; this time we handle those
we should not be able to jump to at this point. */
link = nonlocal_labels;
slot = nonlocal_goto_handler_slots;
any_invalid = 0;
for (; link; link = TREE_CHAIN (link), slot = XEXP (slot, 1))
if (DECL_TOO_LATE (TREE_VALUE (link)))
{
rtx lab;
lab = expand_nl_handler_label (XEXP (slot, 0),
thisblock->data.block.first_insn);
label_list = gen_rtx_EXPR_LIST (VOIDmode, lab, label_list);
any_invalid = 1;
}
if (any_invalid)
{
expand_nl_goto_receiver ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "abort"), LCT_NORETURN,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
VOIDmode, 0);
emit_barrier ();
}
nonlocal_goto_handler_labels = label_list;
emit_label (afterward);
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Warn about any unused VARS (which may contain nodes other than
VAR_DECLs, but such nodes are ignored). The nodes are connected
via the TREE_CHAIN field. */
void
warn_about_unused_variables (vars)
tree vars;
{
tree decl;
if (warn_unused_variable)
for (decl = vars; decl; decl = TREE_CHAIN (decl))
if (TREE_CODE (decl) == VAR_DECL
&& ! TREE_USED (decl)
&& ! DECL_IN_SYSTEM_HEADER (decl)
&& DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
warning_with_decl (decl, "unused variable `%s'");
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Generate RTL code to terminate a binding contour.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
VARS is the chain of VAR_DECL nodes for the variables bound in this
contour. There may actually be other nodes in this chain, but any
nodes other than VAR_DECLS are ignored.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
MARK_ENDS is nonzero if we should put a note at the beginning
and end of this binding contour.
DONT_JUMP_IN is nonzero if it is not valid to jump into this contour.
(That is true automatically if the contour has a saved stack level.) */
void
expand_end_bindings (vars, mark_ends, dont_jump_in)
tree vars;
int mark_ends;
int dont_jump_in;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct nesting *thisblock = block_stack;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If any of the variables in this scope were not used, warn the
user. */
warn_about_unused_variables (vars);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (thisblock->exit_label)
{
do_pending_stack_adjust ();
emit_label (thisblock->exit_label);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* If necessary, make handlers for nonlocal gotos taking
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
place in the function calls in this block. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (function_call_count != thisblock->data.block.n_function_calls
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
&& nonlocal_labels
/* Make handler for outermost block
if there were any nonlocal gotos to this function. */
&& (thisblock->next == 0 ? current_function_has_nonlocal_label
/* Make handler for inner block if it has something
special to do when you jump out of it. */
: (thisblock->data.block.cleanups != 0
|| thisblock->data.block.stack_level != 0)))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
expand_nl_goto_receivers (thisblock);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Don't allow jumping into a block that has a stack level.
Cleanups are allowed, though. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (dont_jump_in
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
|| thisblock->data.block.stack_level != 0)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
struct label_chain *chain;
/* Any labels in this block are no longer valid to go to.
Mark them to cause an error message. */
for (chain = thisblock->data.block.label_chain; chain; chain = chain->next)
{
DECL_TOO_LATE (chain->label) = 1;
/* If any goto without a fixup came to this label,
that must be an error, because gotos without fixups
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
come from outside all saved stack-levels. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (TREE_ADDRESSABLE (chain->label))
error_with_decl (chain->label,
"label `%s' used before containing binding contour");
}
}
/* Restore stack level in effect before the block
(only if variable-size objects allocated). */
/* Perform any cleanups associated with the block. */
if (thisblock->data.block.stack_level != 0
|| thisblock->data.block.cleanups != 0)
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int reachable;
rtx insn;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Don't let cleanups affect ({...}) constructs. */
int old_expr_stmts_for_value = expr_stmts_for_value;
rtx old_last_expr_value = last_expr_value;
tree old_last_expr_type = last_expr_type;
expr_stmts_for_value = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Only clean up here if this point can actually be reached. */
insn = get_last_insn ();
if (GET_CODE (insn) == NOTE)
insn = prev_nonnote_insn (insn);
reachable = (! insn || GET_CODE (insn) != BARRIER);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Do the cleanups. */
expand_cleanups (thisblock->data.block.cleanups, NULL_TREE, 0, reachable);
if (reachable)
do_pending_stack_adjust ();
expr_stmts_for_value = old_expr_stmts_for_value;
last_expr_value = old_last_expr_value;
last_expr_type = old_last_expr_type;
/* Restore the stack level. */
if (reachable && thisblock->data.block.stack_level != 0)
{
emit_stack_restore (thisblock->next ? SAVE_BLOCK : SAVE_FUNCTION,
thisblock->data.block.stack_level, NULL_RTX);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (nonlocal_goto_handler_slots != 0)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_stack_save (SAVE_NONLOCAL, &nonlocal_goto_stack_level,
NULL_RTX);
}
/* Any gotos out of this block must also do these things.
Also report any gotos with fixups that came to labels in this
level. */
fixup_gotos (thisblock,
thisblock->data.block.stack_level,
thisblock->data.block.cleanups,
thisblock->data.block.first_insn,
dont_jump_in);
}
/* Mark the beginning and end of the scope if requested.
We do this now, after running cleanups on the variables
just going out of scope, so they are in scope for their cleanups. */
if (mark_ends)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx note = emit_note (NULL, NOTE_INSN_BLOCK_END);
NOTE_BLOCK (note) = NOTE_BLOCK (thisblock->data.block.first_insn);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
/* Get rid of the beginning-mark if we don't make an end-mark. */
NOTE_LINE_NUMBER (thisblock->data.block.first_insn) = NOTE_INSN_DELETED;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Restore the temporary level of TARGET_EXPRs. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
target_temp_slot_level = thisblock->data.block.block_target_temp_slot_level;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Restore block_stack level for containing block. */
stack_block_stack = thisblock->data.block.innermost_stack_block;
POPSTACK (block_stack);
/* Pop the stack slot nesting and free any slots at this level. */
pop_temp_slots ();
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Generate code to save the stack pointer at the start of the current block
and set up to restore it on exit. */
void
save_stack_pointer ()
{
struct nesting *thisblock = block_stack;
if (thisblock->data.block.stack_level == 0)
{
emit_stack_save (thisblock->next ? SAVE_BLOCK : SAVE_FUNCTION,
&thisblock->data.block.stack_level,
thisblock->data.block.first_insn);
stack_block_stack = thisblock;
}
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Generate RTL for the automatic variable declaration DECL.
(Other kinds of declarations are simply ignored if seen here.) */
void
expand_decl (decl)
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2002-02-01 18:16:02 +00:00
tree decl;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct nesting *thisblock;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree type;
type = TREE_TYPE (decl);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* For a CONST_DECL, set mode, alignment, and sizes from those of the
type in case this node is used in a reference. */
if (TREE_CODE (decl) == CONST_DECL)
{
DECL_MODE (decl) = TYPE_MODE (type);
DECL_ALIGN (decl) = TYPE_ALIGN (type);
DECL_SIZE (decl) = TYPE_SIZE (type);
DECL_SIZE_UNIT (decl) = TYPE_SIZE_UNIT (type);
return;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Otherwise, only automatic variables need any expansion done. Static and
external variables, and external functions, will be handled by
`assemble_variable' (called from finish_decl). TYPE_DECL requires
nothing. PARM_DECLs are handled in `assign_parms'. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (TREE_CODE (decl) != VAR_DECL)
return;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (TREE_STATIC (decl) || DECL_EXTERNAL (decl))
return;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
thisblock = block_stack;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Create the RTL representation for the variable. */
if (type == error_mark_node)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_DECL_RTL (decl, gen_rtx_MEM (BLKmode, const0_rtx));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else if (DECL_SIZE (decl) == 0)
/* Variable with incomplete type. */
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx x;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (DECL_INITIAL (decl) == 0)
/* Error message was already done; now avoid a crash. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
x = gen_rtx_MEM (BLKmode, const0_rtx);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
/* An initializer is going to decide the size of this array.
Until we know the size, represent its address with a reg. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
x = gen_rtx_MEM (BLKmode, gen_reg_rtx (Pmode));
set_mem_attributes (x, decl, 1);
SET_DECL_RTL (decl, x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
else if (DECL_MODE (decl) != BLKmode
/* If -ffloat-store, don't put explicit float vars
into regs. */
&& !(flag_float_store
&& TREE_CODE (type) == REAL_TYPE)
&& ! TREE_THIS_VOLATILE (decl)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& (DECL_REGISTER (decl) || optimize))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
/* Automatic variable that can go in a register. */
int unsignedp = TREE_UNSIGNED (type);
enum machine_mode reg_mode
= promote_mode (type, DECL_MODE (decl), &unsignedp, 0);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_DECL_RTL (decl, gen_reg_rtx (reg_mode));
if (GET_CODE (DECL_RTL (decl)) == REG)
REGNO_DECL (REGNO (DECL_RTL (decl))) = decl;
else if (GET_CODE (DECL_RTL (decl)) == CONCAT)
{
REGNO_DECL (REGNO (XEXP (DECL_RTL (decl), 0))) = decl;
REGNO_DECL (REGNO (XEXP (DECL_RTL (decl), 1))) = decl;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
mark_user_reg (DECL_RTL (decl));
if (POINTER_TYPE_P (type))
mark_reg_pointer (DECL_RTL (decl),
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
TYPE_ALIGN (TREE_TYPE (TREE_TYPE (decl))));
maybe_set_unchanging (DECL_RTL (decl), decl);
/* If something wants our address, try to use ADDRESSOF. */
if (TREE_ADDRESSABLE (decl))
put_var_into_stack (decl);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (TREE_CODE (DECL_SIZE_UNIT (decl)) == INTEGER_CST
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
&& ! (flag_stack_check && ! STACK_CHECK_BUILTIN
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& 0 < compare_tree_int (DECL_SIZE_UNIT (decl),
STACK_CHECK_MAX_VAR_SIZE)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
/* Variable of fixed size that goes on the stack. */
rtx oldaddr = 0;
rtx addr;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx x;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If we previously made RTL for this decl, it must be an array
whose size was determined by the initializer.
The old address was a register; set that register now
to the proper address. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (DECL_RTL_SET_P (decl))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
if (GET_CODE (DECL_RTL (decl)) != MEM
|| GET_CODE (XEXP (DECL_RTL (decl), 0)) != REG)
abort ();
oldaddr = XEXP (DECL_RTL (decl), 0);
}
/* Set alignment we actually gave this decl. */
DECL_ALIGN (decl) = (DECL_MODE (decl) == BLKmode ? BIGGEST_ALIGNMENT
: GET_MODE_BITSIZE (DECL_MODE (decl)));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
DECL_USER_ALIGN (decl) = 0;
x = assign_temp (TREE_TYPE (decl), 1, 1, 1);
set_mem_attributes (x, decl, 1);
SET_DECL_RTL (decl, x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (oldaddr)
{
addr = force_operand (XEXP (DECL_RTL (decl), 0), oldaddr);
if (addr != oldaddr)
emit_move_insn (oldaddr, addr);
}
}
else
/* Dynamic-size object: must push space on the stack. */
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx address, size, x;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Record the stack pointer on entry to block, if have
not already done so. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
do_pending_stack_adjust ();
save_stack_pointer ();
/* In function-at-a-time mode, variable_size doesn't expand this,
so do it now. */
if (TREE_CODE (type) == ARRAY_TYPE && TYPE_DOMAIN (type))
expand_expr (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
const0_rtx, VOIDmode, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Compute the variable's size, in bytes. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
size = expand_expr (DECL_SIZE_UNIT (decl), NULL_RTX, VOIDmode, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
free_temp_slots ();
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Allocate space on the stack for the variable. Note that
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
DECL_ALIGN says how the variable is to be aligned and we
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
cannot use it to conclude anything about the alignment of
the size. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
address = allocate_dynamic_stack_space (size, NULL_RTX,
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
TYPE_ALIGN (TREE_TYPE (decl)));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Reference the variable indirect through that rtx. */
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2002-02-01 18:16:02 +00:00
x = gen_rtx_MEM (DECL_MODE (decl), address);
set_mem_attributes (x, decl, 1);
SET_DECL_RTL (decl, x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Indicate the alignment we actually gave this variable. */
#ifdef STACK_BOUNDARY
DECL_ALIGN (decl) = STACK_BOUNDARY;
#else
DECL_ALIGN (decl) = BIGGEST_ALIGNMENT;
#endif
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
DECL_USER_ALIGN (decl) = 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
/* Emit code to perform the initialization of a declaration DECL. */
void
expand_decl_init (decl)
tree decl;
{
int was_used = TREE_USED (decl);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If this is a CONST_DECL, we don't have to generate any code. Likewise
for static decls. */
if (TREE_CODE (decl) == CONST_DECL
|| TREE_STATIC (decl))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return;
/* Compute and store the initial value now. */
if (DECL_INITIAL (decl) == error_mark_node)
{
enum tree_code code = TREE_CODE (TREE_TYPE (decl));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (code == INTEGER_TYPE || code == REAL_TYPE || code == ENUMERAL_TYPE
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
|| code == POINTER_TYPE || code == REFERENCE_TYPE)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
expand_assignment (decl, convert (TREE_TYPE (decl), integer_zero_node),
0, 0);
emit_queue ();
}
else if (DECL_INITIAL (decl) && TREE_CODE (DECL_INITIAL (decl)) != TREE_LIST)
{
emit_line_note (DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
expand_assignment (decl, DECL_INITIAL (decl), 0, 0);
emit_queue ();
}
/* Don't let the initialization count as "using" the variable. */
TREE_USED (decl) = was_used;
/* Free any temporaries we made while initializing the decl. */
preserve_temp_slots (NULL_RTX);
free_temp_slots ();
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* CLEANUP is an expression to be executed at exit from this binding contour;
for example, in C++, it might call the destructor for this variable.
We wrap CLEANUP in an UNSAVE_EXPR node, so that we can expand the
CLEANUP multiple times, and have the correct semantics. This
happens in exception handling, for gotos, returns, breaks that
leave the current scope.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
If CLEANUP is nonzero and DECL is zero, we record a cleanup
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
that is not associated with any particular variable. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
int
expand_decl_cleanup (decl, cleanup)
tree decl, cleanup;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct nesting *thisblock;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Error if we are not in any block. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (cfun == 0 || block_stack == 0)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
thisblock = block_stack;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Record the cleanup if there is one. */
if (cleanup != 0)
{
tree t;
rtx seq;
tree *cleanups = &thisblock->data.block.cleanups;
int cond_context = conditional_context ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (cond_context)
{
rtx flag = gen_reg_rtx (word_mode);
rtx set_flag_0;
tree cond;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
start_sequence ();
emit_move_insn (flag, const0_rtx);
set_flag_0 = get_insns ();
end_sequence ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
thisblock->data.block.last_unconditional_cleanup
= emit_insns_after (set_flag_0,
thisblock->data.block.last_unconditional_cleanup);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
emit_move_insn (flag, const1_rtx);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
cond = build_decl (VAR_DECL, NULL_TREE, type_for_mode (word_mode, 1));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_DECL_RTL (cond, flag);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Conditionalize the cleanup. */
cleanup = build (COND_EXPR, void_type_node,
truthvalue_conversion (cond),
cleanup, integer_zero_node);
cleanup = fold (cleanup);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
cleanups = thisblock->data.block.cleanup_ptr;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
cleanup = unsave_expr (cleanup);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
t = *cleanups = tree_cons (decl, cleanup, *cleanups);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (! cond_context)
/* If this block has a cleanup, it belongs in stack_block_stack. */
stack_block_stack = thisblock;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (cond_context)
{
start_sequence ();
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! using_eh_for_cleanups_p)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
TREE_ADDRESSABLE (t) = 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else
expand_eh_region_start ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (cond_context)
{
seq = get_insns ();
end_sequence ();
if (seq)
thisblock->data.block.last_unconditional_cleanup
= emit_insns_after (seq,
thisblock->data.block.last_unconditional_cleanup);
}
else
{
thisblock->data.block.last_unconditional_cleanup
= get_last_insn ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* When we insert instructions after the last unconditional cleanup,
we don't adjust last_insn. That means that a later add_insn will
clobber the instructions we've just added. The easiest way to
fix this is to just insert another instruction here, so that the
instructions inserted after the last unconditional cleanup are
never the last instruction. */
emit_note (NULL, NOTE_INSN_DELETED);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
thisblock->data.block.cleanup_ptr = &thisblock->data.block.cleanups;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 1;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* DECL is an anonymous union. CLEANUP is a cleanup for DECL.
DECL_ELTS is the list of elements that belong to DECL's type.
In each, the TREE_VALUE is a VAR_DECL, and the TREE_PURPOSE a cleanup. */
void
expand_anon_union_decl (decl, cleanup, decl_elts)
tree decl, cleanup, decl_elts;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct nesting *thisblock = cfun == 0 ? 0 : block_stack;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx x;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tree t;
/* If any of the elements are addressable, so is the entire union. */
for (t = decl_elts; t; t = TREE_CHAIN (t))
if (TREE_ADDRESSABLE (TREE_VALUE (t)))
{
TREE_ADDRESSABLE (decl) = 1;
break;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
expand_decl (decl);
expand_decl_cleanup (decl, cleanup);
x = DECL_RTL (decl);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Go through the elements, assigning RTL to each. */
for (t = decl_elts; t; t = TREE_CHAIN (t))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tree decl_elt = TREE_VALUE (t);
tree cleanup_elt = TREE_PURPOSE (t);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
enum machine_mode mode = TYPE_MODE (TREE_TYPE (decl_elt));
/* Propagate the union's alignment to the elements. */
DECL_ALIGN (decl_elt) = DECL_ALIGN (decl);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
DECL_USER_ALIGN (decl_elt) = DECL_USER_ALIGN (decl);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If the element has BLKmode and the union doesn't, the union is
aligned such that the element doesn't need to have BLKmode, so
change the element's mode to the appropriate one for its size. */
if (mode == BLKmode && DECL_MODE (decl) != BLKmode)
DECL_MODE (decl_elt) = mode
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
= mode_for_size_tree (DECL_SIZE (decl_elt), MODE_INT, 1);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* (SUBREG (MEM ...)) at RTL generation time is invalid, so we
instead create a new MEM rtx with the proper mode. */
if (GET_CODE (x) == MEM)
{
if (mode == GET_MODE (x))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_DECL_RTL (decl_elt, x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_DECL_RTL (decl_elt, adjust_address_nv (x, mode, 0));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
else if (GET_CODE (x) == REG)
{
if (mode == GET_MODE (x))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_DECL_RTL (decl_elt, x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SET_DECL_RTL (decl_elt, gen_lowpart_SUBREG (mode, x));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
else
abort ();
/* Record the cleanup if there is one. */
if (cleanup != 0)
thisblock->data.block.cleanups
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
= tree_cons (decl_elt, cleanup_elt,
thisblock->data.block.cleanups);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
/* Expand a list of cleanups LIST.
Elements may be expressions or may be nested lists.
If DONT_DO is nonnull, then any list-element
whose TREE_PURPOSE matches DONT_DO is omitted.
This is sometimes used to avoid a cleanup associated with
a value that is being returned out of the scope.
If IN_FIXUP is non-zero, we are generating this cleanup for a fixup
goto and handle protection regions specially in that case.
If REACHABLE, we emit code, otherwise just inform the exception handling
code about this finalization. */
static void
expand_cleanups (list, dont_do, in_fixup, reachable)
tree list;
tree dont_do;
int in_fixup;
int reachable;
{
tree tail;
for (tail = list; tail; tail = TREE_CHAIN (tail))
if (dont_do == 0 || TREE_PURPOSE (tail) != dont_do)
{
if (TREE_CODE (TREE_VALUE (tail)) == TREE_LIST)
expand_cleanups (TREE_VALUE (tail), dont_do, in_fixup, reachable);
else
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! in_fixup && using_eh_for_cleanups_p)
expand_eh_region_end_cleanup (TREE_VALUE (tail));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (reachable)
{
/* Cleanups may be run multiple times. For example,
when exiting a binding contour, we expand the
cleanups associated with that contour. When a goto
within that binding contour has a target outside that
contour, it will expand all cleanups from its scope to
the target. Though the cleanups are expanded multiple
times, the control paths are non-overlapping so the
cleanups will not be executed twice. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* We may need to protect from outer cleanups. */
if (in_fixup && using_eh_for_cleanups_p)
{
expand_eh_region_start ();
expand_expr (TREE_VALUE (tail), const0_rtx, VOIDmode, 0);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
expand_eh_region_end_fixup (TREE_VALUE (tail));
}
else
expand_expr (TREE_VALUE (tail), const0_rtx, VOIDmode, 0);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
free_temp_slots ();
}
}
}
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Mark when the context we are emitting RTL for as a conditional
context, so that any cleanup actions we register with
expand_decl_init will be properly conditionalized when those
cleanup actions are later performed. Must be called before any
expression (tree) is expanded that is within a conditional context. */
void
start_cleanup_deferral ()
{
/* block_stack can be NULL if we are inside the parameter list. It is
OK to do nothing, because cleanups aren't possible here. */
if (block_stack)
++block_stack->data.block.conditional_code;
}
/* Mark the end of a conditional region of code. Because cleanup
deferrals may be nested, we may still be in a conditional region
after we end the currently deferred cleanups, only after we end all
deferred cleanups, are we back in unconditional code. */
void
end_cleanup_deferral ()
{
/* block_stack can be NULL if we are inside the parameter list. It is
OK to do nothing, because cleanups aren't possible here. */
if (block_stack)
--block_stack->data.block.conditional_code;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Move all cleanups from the current block_stack
to the containing block_stack, where they are assumed to
have been created. If anything can cause a temporary to
be created, but not expanded for more than one level of
block_stacks, then this code will have to change. */
void
move_cleanups_up ()
{
struct nesting *block = block_stack;
struct nesting *outer = block->next;
outer->data.block.cleanups
= chainon (block->data.block.cleanups,
outer->data.block.cleanups);
block->data.block.cleanups = 0;
}
tree
last_cleanup_this_contour ()
{
if (block_stack == 0)
return 0;
return block_stack->data.block.cleanups;
}
/* Return 1 if there are any pending cleanups at this point.
If THIS_CONTOUR is nonzero, check the current contour as well.
Otherwise, look only at the contours that enclose this one. */
int
any_pending_cleanups (this_contour)
int this_contour;
{
struct nesting *block;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (cfun == NULL || cfun->stmt == NULL || block_stack == 0)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 0;
if (this_contour && block_stack->data.block.cleanups != NULL)
return 1;
if (block_stack->data.block.cleanups == 0
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
&& block_stack->data.block.outer_cleanups == 0)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 0;
for (block = block_stack->next; block; block = block->next)
if (block->data.block.cleanups != 0)
return 1;
return 0;
}
/* Enter a case (Pascal) or switch (C) statement.
Push a block onto case_stack and nesting_stack
to accumulate the case-labels that are seen
and to record the labels generated for the statement.
EXIT_FLAG is nonzero if `exit_something' should exit this case stmt.
Otherwise, this construct is transparent for `exit_something'.
EXPR is the index-expression to be dispatched on.
TYPE is its nominal type. We could simply convert EXPR to this type,
but instead we take short cuts. */
void
expand_start_case (exit_flag, expr, type, printname)
int exit_flag;
tree expr;
tree type;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
const char *printname;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct nesting *thiscase = ALLOC_NESTING ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Make an entry on case_stack for the case we are entering. */
thiscase->next = case_stack;
thiscase->all = nesting_stack;
thiscase->depth = ++nesting_depth;
thiscase->exit_label = exit_flag ? gen_label_rtx () : 0;
thiscase->data.case_stmt.case_list = 0;
thiscase->data.case_stmt.index_expr = expr;
thiscase->data.case_stmt.nominal_type = type;
thiscase->data.case_stmt.default_label = 0;
thiscase->data.case_stmt.printname = printname;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
thiscase->data.case_stmt.line_number_status = force_line_numbers ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case_stack = thiscase;
nesting_stack = thiscase;
do_pending_stack_adjust ();
/* Make sure case_stmt.start points to something that won't
need any transformation before expand_end_case. */
if (GET_CODE (get_last_insn ()) != NOTE)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_note (NULL, NOTE_INSN_DELETED);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
thiscase->data.case_stmt.start = get_last_insn ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
start_cleanup_deferral ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Start a "dummy case statement" within which case labels are invalid
and are not connected to any larger real case statement.
This can be used if you don't want to let a case statement jump
into the middle of certain kinds of constructs. */
void
expand_start_case_dummy ()
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct nesting *thiscase = ALLOC_NESTING ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Make an entry on case_stack for the dummy. */
thiscase->next = case_stack;
thiscase->all = nesting_stack;
thiscase->depth = ++nesting_depth;
thiscase->exit_label = 0;
thiscase->data.case_stmt.case_list = 0;
thiscase->data.case_stmt.start = 0;
thiscase->data.case_stmt.nominal_type = 0;
thiscase->data.case_stmt.default_label = 0;
case_stack = thiscase;
nesting_stack = thiscase;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
start_cleanup_deferral ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* End a dummy case statement. */
void
expand_end_case_dummy ()
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
end_cleanup_deferral ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
POPSTACK (case_stack);
}
/* Return the data type of the index-expression
of the innermost case statement, or null if none. */
tree
case_index_expr_type ()
{
if (case_stack)
return TREE_TYPE (case_stack->data.case_stmt.index_expr);
return 0;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
static void
check_seenlabel ()
{
/* If this is the first label, warn if any insns have been emitted. */
if (case_stack->data.case_stmt.line_number_status >= 0)
{
rtx insn;
restore_line_number_status
(case_stack->data.case_stmt.line_number_status);
case_stack->data.case_stmt.line_number_status = -1;
for (insn = case_stack->data.case_stmt.start;
insn;
insn = NEXT_INSN (insn))
{
if (GET_CODE (insn) == CODE_LABEL)
break;
if (GET_CODE (insn) != NOTE
&& (GET_CODE (insn) != INSN || GET_CODE (PATTERN (insn)) != USE))
{
do
insn = PREV_INSN (insn);
while (insn && (GET_CODE (insn) != NOTE || NOTE_LINE_NUMBER (insn) < 0));
/* If insn is zero, then there must have been a syntax error. */
if (insn)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
warning_with_file_and_line (NOTE_SOURCE_FILE (insn),
NOTE_LINE_NUMBER (insn),
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
"unreachable code at beginning of %s",
case_stack->data.case_stmt.printname);
break;
}
}
}
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Accumulate one case or default label inside a case or switch statement.
VALUE is the value of the case (a null pointer, for a default label).
The function CONVERTER, when applied to arguments T and V,
converts the value V to the type T.
If not currently inside a case or switch statement, return 1 and do
nothing. The caller will print a language-specific error message.
If VALUE is a duplicate or overlaps, return 2 and do nothing
except store the (first) duplicate node in *DUPLICATE.
If VALUE is out of range, return 3 and do nothing.
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
If we are jumping into the scope of a cleanup or var-sized array, return 5.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Return 0 on success.
Extended to handle range statements. */
int
pushcase (value, converter, label, duplicate)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tree value;
tree (*converter) PARAMS ((tree, tree));
tree label;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree *duplicate;
{
tree index_type;
tree nominal_type;
/* Fail if not inside a real case statement. */
if (! (case_stack && case_stack->data.case_stmt.start))
return 1;
if (stack_block_stack
&& stack_block_stack->depth > case_stack->depth)
return 5;
index_type = TREE_TYPE (case_stack->data.case_stmt.index_expr);
nominal_type = case_stack->data.case_stmt.nominal_type;
/* If the index is erroneous, avoid more problems: pretend to succeed. */
if (index_type == error_mark_node)
return 0;
/* Convert VALUE to the type in which the comparisons are nominally done. */
if (value != 0)
value = (*converter) (nominal_type, value);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
check_seenlabel ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Fail if this value is out of range for the actual type of the index
(which may be narrower than NOMINAL_TYPE). */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (value != 0
&& (TREE_CONSTANT_OVERFLOW (value)
|| ! int_fits_type_p (value, index_type)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 3;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return add_case_node (value, value, label, duplicate);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Like pushcase but this case applies to all values between VALUE1 and
VALUE2 (inclusive). If VALUE1 is NULL, the range starts at the lowest
value of the index type and ends at VALUE2. If VALUE2 is NULL, the range
starts at VALUE1 and ends at the highest value of the index type.
If both are NULL, this case applies to all values.
The return value is the same as that of pushcase but there is one
additional error code: 4 means the specified range was empty. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
int
pushcase_range (value1, value2, converter, label, duplicate)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tree value1, value2;
tree (*converter) PARAMS ((tree, tree));
tree label;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree *duplicate;
{
tree index_type;
tree nominal_type;
/* Fail if not inside a real case statement. */
if (! (case_stack && case_stack->data.case_stmt.start))
return 1;
if (stack_block_stack
&& stack_block_stack->depth > case_stack->depth)
return 5;
index_type = TREE_TYPE (case_stack->data.case_stmt.index_expr);
nominal_type = case_stack->data.case_stmt.nominal_type;
/* If the index is erroneous, avoid more problems: pretend to succeed. */
if (index_type == error_mark_node)
return 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
check_seenlabel ();
/* Convert VALUEs to type in which the comparisons are nominally done
and replace any unspecified value with the corresponding bound. */
if (value1 == 0)
value1 = TYPE_MIN_VALUE (index_type);
if (value2 == 0)
value2 = TYPE_MAX_VALUE (index_type);
/* Fail if the range is empty. Do this before any conversion since
we want to allow out-of-range empty ranges. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (value2 != 0 && tree_int_cst_lt (value2, value1))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 4;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If the max was unbounded, use the max of the nominal_type we are
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
converting to. Do this after the < check above to suppress false
positives. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (value2 == 0)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
value2 = TYPE_MAX_VALUE (nominal_type);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
value1 = (*converter) (nominal_type, value1);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
value2 = (*converter) (nominal_type, value2);
/* Fail if these values are out of range. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (TREE_CONSTANT_OVERFLOW (value1)
|| ! int_fits_type_p (value1, index_type))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 3;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (TREE_CONSTANT_OVERFLOW (value2)
|| ! int_fits_type_p (value2, index_type))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 3;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return add_case_node (value1, value2, label, duplicate);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Do the actual insertion of a case label for pushcase and pushcase_range
into case_stack->data.case_stmt.case_list. Use an AVL tree to avoid
slowdown for large switch statements. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
add_case_node (low, high, label, duplicate)
tree low, high;
tree label;
tree *duplicate;
{
struct case_node *p, **q, *r;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If there's no HIGH value, then this is not a case range; it's
just a simple case label. But that's just a degenerate case
range. */
if (!high)
high = low;
/* Handle default labels specially. */
if (!high && !low)
{
if (case_stack->data.case_stmt.default_label != 0)
{
*duplicate = case_stack->data.case_stmt.default_label;
return 2;
}
case_stack->data.case_stmt.default_label = label;
expand_label (label);
return 0;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
q = &case_stack->data.case_stmt.case_list;
p = *q;
while ((r = *q))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
p = r;
/* Keep going past elements distinctly greater than HIGH. */
if (tree_int_cst_lt (high, p->low))
q = &p->left;
/* or distinctly less than LOW. */
else if (tree_int_cst_lt (p->high, low))
q = &p->right;
else
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* We have an overlap; this is an error. */
*duplicate = p->code_label;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 2;
}
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Add this label to the chain, and succeed. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
r = (struct case_node *) xmalloc (sizeof (struct case_node));
r->low = low;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* If the bounds are equal, turn this into the one-value case. */
if (tree_int_cst_equal (low, high))
r->high = r->low;
else
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
r->high = high;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
r->code_label = label;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
expand_label (label);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
*q = r;
r->parent = p;
r->left = 0;
r->right = 0;
r->balance = 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
while (p)
{
struct case_node *s;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (r == p->left)
{
int b;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (! (b = p->balance))
/* Growth propagation from left side. */
p->balance = -1;
else if (b < 0)
{
if (r->balance < 0)
{
/* R-Rotation */
if ((p->left = s = r->right))
s->parent = p;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
r->right = p;
p->balance = 0;
r->balance = 0;
s = p->parent;
p->parent = r;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if ((r->parent = s))
{
if (s->left == p)
s->left = r;
else
s->right = r;
}
else
case_stack->data.case_stmt.case_list = r;
}
else
/* r->balance == +1 */
{
/* LR-Rotation */
int b2;
struct case_node *t = r->right;
if ((p->left = s = t->right))
s->parent = p;
t->right = p;
if ((r->right = s = t->left))
s->parent = r;
t->left = r;
b = t->balance;
b2 = b < 0;
p->balance = b2;
b2 = -b2 - b;
r->balance = b2;
t->balance = 0;
s = p->parent;
p->parent = t;
r->parent = t;
if ((t->parent = s))
{
if (s->left == p)
s->left = t;
else
s->right = t;
}
else
case_stack->data.case_stmt.case_list = t;
}
break;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
else
{
/* p->balance == +1; growth of left side balances the node. */
p->balance = 0;
break;
}
}
else
/* r == p->right */
{
int b;
if (! (b = p->balance))
/* Growth propagation from right side. */
p->balance++;
else if (b > 0)
{
if (r->balance > 0)
{
/* L-Rotation */
if ((p->right = s = r->left))
s->parent = p;
r->left = p;
p->balance = 0;
r->balance = 0;
s = p->parent;
p->parent = r;
if ((r->parent = s))
{
if (s->left == p)
s->left = r;
else
s->right = r;
}
else
case_stack->data.case_stmt.case_list = r;
}
else
/* r->balance == -1 */
{
/* RL-Rotation */
int b2;
struct case_node *t = r->left;
if ((p->right = s = t->left))
s->parent = p;
t->left = p;
if ((r->left = s = t->right))
s->parent = r;
t->right = r;
b = t->balance;
b2 = b < 0;
r->balance = b2;
b2 = -b2 - b;
p->balance = b2;
t->balance = 0;
s = p->parent;
p->parent = t;
r->parent = t;
if ((t->parent = s))
{
if (s->left == p)
s->left = t;
else
s->right = t;
}
else
case_stack->data.case_stmt.case_list = t;
}
break;
}
else
{
/* p->balance == -1; growth of right side balances the node. */
p->balance = 0;
break;
}
}
r = p;
p = p->parent;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
return 0;
}
/* Returns the number of possible values of TYPE.
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Returns -1 if the number is unknown, variable, or if the number does not
fit in a HOST_WIDE_INT.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Sets *SPARENESS to 2 if TYPE is an ENUMERAL_TYPE whose values
do not increase monotonically (there may be duplicates);
to 1 if the values increase monotonically, but not always by 1;
otherwise sets it to 0. */
HOST_WIDE_INT
all_cases_count (type, spareness)
tree type;
int *spareness;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tree t;
HOST_WIDE_INT count, minval, lastval;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
*spareness = 0;
switch (TREE_CODE (type))
{
case BOOLEAN_TYPE:
count = 2;
break;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CHAR_TYPE:
count = 1 << BITS_PER_UNIT;
break;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
default:
case INTEGER_TYPE:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (TYPE_MAX_VALUE (type) != 0
&& 0 != (t = fold (build (MINUS_EXPR, type, TYPE_MAX_VALUE (type),
TYPE_MIN_VALUE (type))))
&& 0 != (t = fold (build (PLUS_EXPR, type, t,
convert (type, integer_zero_node))))
&& host_integerp (t, 1))
count = tree_low_cst (t, 1);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return -1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
break;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case ENUMERAL_TYPE:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Don't waste time with enumeral types with huge values. */
if (! host_integerp (TYPE_MIN_VALUE (type), 0)
|| TYPE_MAX_VALUE (type) == 0
|| ! host_integerp (TYPE_MAX_VALUE (type), 0))
return -1;
lastval = minval = tree_low_cst (TYPE_MIN_VALUE (type), 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
count = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (t = TYPE_VALUES (type); t != NULL_TREE; t = TREE_CHAIN (t))
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
HOST_WIDE_INT thisval = tree_low_cst (TREE_VALUE (t), 0);
if (*spareness == 2 || thisval < lastval)
*spareness = 2;
else if (thisval != minval + count)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
*spareness = 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
count++;
}
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return count;
}
#define BITARRAY_TEST(ARRAY, INDEX) \
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
((ARRAY)[(unsigned) (INDEX) / HOST_BITS_PER_CHAR]\
& (1 << ((unsigned) (INDEX) % HOST_BITS_PER_CHAR)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#define BITARRAY_SET(ARRAY, INDEX) \
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
((ARRAY)[(unsigned) (INDEX) / HOST_BITS_PER_CHAR]\
|= 1 << ((unsigned) (INDEX) % HOST_BITS_PER_CHAR))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Set the elements of the bitstring CASES_SEEN (which has length COUNT),
with the case values we have seen, assuming the case expression
has the given TYPE.
SPARSENESS is as determined by all_cases_count.
The time needed is proportional to COUNT, unless
SPARSENESS is 2, in which case quadratic time is needed. */
void
mark_seen_cases (type, cases_seen, count, sparseness)
tree type;
unsigned char *cases_seen;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
HOST_WIDE_INT count;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
int sparseness;
{
tree next_node_to_try = NULL_TREE;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
HOST_WIDE_INT next_node_offset = 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct case_node *n, *root = case_stack->data.case_stmt.case_list;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree val = make_node (INTEGER_CST);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
TREE_TYPE (val) = type;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (! root)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Do nothing. */
;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
else if (sparseness == 2)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
tree t;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
unsigned HOST_WIDE_INT xlo;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* This less efficient loop is only needed to handle
duplicate case values (multiple enum constants
with the same value). */
TREE_TYPE (val) = TREE_TYPE (root->low);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (t = TYPE_VALUES (type), xlo = 0; t != NULL_TREE;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
t = TREE_CHAIN (t), xlo++)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
TREE_INT_CST_LOW (val) = TREE_INT_CST_LOW (TREE_VALUE (t));
TREE_INT_CST_HIGH (val) = TREE_INT_CST_HIGH (TREE_VALUE (t));
n = root;
do
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Keep going past elements distinctly greater than VAL. */
if (tree_int_cst_lt (val, n->low))
n = n->left;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* or distinctly less than VAL. */
else if (tree_int_cst_lt (n->high, val))
n = n->right;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
else
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* We have found a matching range. */
BITARRAY_SET (cases_seen, xlo);
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
while (n);
}
}
else
{
if (root->left)
case_stack->data.case_stmt.case_list = root = case_tree2list (root, 0);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
for (n = root; n; n = n->right)
{
TREE_INT_CST_LOW (val) = TREE_INT_CST_LOW (n->low);
TREE_INT_CST_HIGH (val) = TREE_INT_CST_HIGH (n->low);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
while (! tree_int_cst_lt (n->high, val))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Calculate (into xlo) the "offset" of the integer (val).
The element with lowest value has offset 0, the next smallest
element has offset 1, etc. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
unsigned HOST_WIDE_INT xlo;
HOST_WIDE_INT xhi;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
tree t;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (sparseness && TYPE_VALUES (type) != NULL_TREE)
{
/* The TYPE_VALUES will be in increasing order, so
starting searching where we last ended. */
t = next_node_to_try;
xlo = next_node_offset;
xhi = 0;
for (;;)
{
if (t == NULL_TREE)
{
t = TYPE_VALUES (type);
xlo = 0;
}
if (tree_int_cst_equal (val, TREE_VALUE (t)))
{
next_node_to_try = TREE_CHAIN (t);
next_node_offset = xlo + 1;
break;
}
xlo++;
t = TREE_CHAIN (t);
if (t == next_node_to_try)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
xlo = -1;
break;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
else
{
t = TYPE_MIN_VALUE (type);
if (t)
neg_double (TREE_INT_CST_LOW (t), TREE_INT_CST_HIGH (t),
&xlo, &xhi);
else
xlo = xhi = 0;
add_double (xlo, xhi,
TREE_INT_CST_LOW (val), TREE_INT_CST_HIGH (val),
&xlo, &xhi);
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (xhi == 0 && xlo < (unsigned HOST_WIDE_INT) count)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
BITARRAY_SET (cases_seen, xlo);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
add_double (TREE_INT_CST_LOW (val), TREE_INT_CST_HIGH (val),
1, 0,
&TREE_INT_CST_LOW (val), &TREE_INT_CST_HIGH (val));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
}
}
/* Called when the index of a switch statement is an enumerated type
and there is no default label.
Checks that all enumeration literals are covered by the case
expressions of a switch. Also, warn if there are any extra
switch cases that are *not* elements of the enumerated type.
If all enumeration literals were covered by the case expressions,
turn one of the expressions into the default expression since it should
not be possible to fall through such a switch. */
void
check_for_full_enumeration_handling (type)
tree type;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct case_node *n;
tree chain;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* True iff the selector type is a numbered set mode. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
int sparseness = 0;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* The number of possible selector values. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
HOST_WIDE_INT size;
/* For each possible selector value. a one iff it has been matched
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
by a case value alternative. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
unsigned char *cases_seen;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* The allocated size of cases_seen, in chars. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
HOST_WIDE_INT bytes_needed;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (! warn_switch)
return;
size = all_cases_count (type, &sparseness);
bytes_needed = (size + HOST_BITS_PER_CHAR) / HOST_BITS_PER_CHAR;
if (size > 0 && size < 600000
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* We deliberately use calloc here, not cmalloc, so that we can suppress
this optimization if we don't have enough memory rather than
aborting, as xmalloc would do. */
&& (cases_seen =
(unsigned char *) really_call_calloc (bytes_needed, 1)) != NULL)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
HOST_WIDE_INT i;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree v = TYPE_VALUES (type);
/* The time complexity of this code is normally O(N), where
N being the number of members in the enumerated type.
However, if type is a ENUMERAL_TYPE whose values do not
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
increase monotonically, O(N*log(N)) time may be needed. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
mark_seen_cases (type, cases_seen, size, sparseness);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (i = 0; v != NULL_TREE && i < size; i++, v = TREE_CHAIN (v))
if (BITARRAY_TEST (cases_seen, i) == 0)
warning ("enumeration value `%s' not handled in switch",
IDENTIFIER_POINTER (TREE_PURPOSE (v)));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
free (cases_seen);
}
/* Now we go the other way around; we warn if there are case
expressions that don't correspond to enumerators. This can
occur since C and C++ don't enforce type-checking of
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
assignments to enumeration variables. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (case_stack->data.case_stmt.case_list
&& case_stack->data.case_stmt.case_list->left)
case_stack->data.case_stmt.case_list
= case_tree2list (case_stack->data.case_stmt.case_list, 0);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (warn_switch)
for (n = case_stack->data.case_stmt.case_list; n; n = n->right)
{
for (chain = TYPE_VALUES (type);
chain && !tree_int_cst_equal (n->low, TREE_VALUE (chain));
chain = TREE_CHAIN (chain))
;
if (!chain)
{
if (TYPE_NAME (type) == 0)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
warning ("case value `%ld' not in enumerated type",
(long) TREE_INT_CST_LOW (n->low));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
warning ("case value `%ld' not in enumerated type `%s'",
(long) TREE_INT_CST_LOW (n->low),
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
IDENTIFIER_POINTER ((TREE_CODE (TYPE_NAME (type))
== IDENTIFIER_NODE)
? TYPE_NAME (type)
: DECL_NAME (TYPE_NAME (type))));
}
if (!tree_int_cst_equal (n->low, n->high))
{
for (chain = TYPE_VALUES (type);
chain && !tree_int_cst_equal (n->high, TREE_VALUE (chain));
chain = TREE_CHAIN (chain))
;
if (!chain)
{
if (TYPE_NAME (type) == 0)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
warning ("case value `%ld' not in enumerated type",
(long) TREE_INT_CST_LOW (n->high));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
warning ("case value `%ld' not in enumerated type `%s'",
(long) TREE_INT_CST_LOW (n->high),
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
IDENTIFIER_POINTER ((TREE_CODE (TYPE_NAME (type))
== IDENTIFIER_NODE)
? TYPE_NAME (type)
: DECL_NAME (TYPE_NAME (type))));
}
}
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Free CN, and its children. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
static void
free_case_nodes (cn)
case_node_ptr cn;
{
if (cn)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
free_case_nodes (cn->left);
free_case_nodes (cn->right);
free (cn);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Terminate a case (Pascal) or switch (C) statement
in which ORIG_INDEX is the expression to be tested.
Generate the code to test it and jump to the right place. */
void
expand_end_case (orig_index)
tree orig_index;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tree minval = NULL_TREE, maxval = NULL_TREE, range = NULL_TREE;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx default_label = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
struct case_node *n;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
unsigned int count;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx index;
rtx table_label;
int ncases;
rtx *labelvec;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int i;
rtx before_case, end;
struct nesting *thiscase = case_stack;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree index_expr, index_type;
int unsignedp;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Don't crash due to previous errors. */
if (thiscase == NULL)
return;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
table_label = gen_label_rtx ();
index_expr = thiscase->data.case_stmt.index_expr;
index_type = TREE_TYPE (index_expr);
unsignedp = TREE_UNSIGNED (index_type);
do_pending_stack_adjust ();
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* This might get an spurious warning in the presence of a syntax error;
it could be fixed by moving the call to check_seenlabel after the
check for error_mark_node, and copying the code of check_seenlabel that
deals with case_stack->data.case_stmt.line_number_status /
restore_line_number_status in front of the call to end_cleanup_deferral;
However, this might miss some useful warnings in the presence of
non-syntax errors. */
check_seenlabel ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* An ERROR_MARK occurs for various reasons including invalid data type. */
if (index_type != error_mark_node)
{
/* If switch expression was an enumerated type, check that all
enumeration literals are covered by the cases.
No sense trying this if there's a default case, however. */
if (!thiscase->data.case_stmt.default_label
&& TREE_CODE (TREE_TYPE (orig_index)) == ENUMERAL_TYPE
&& TREE_CODE (index_expr) != INTEGER_CST)
check_for_full_enumeration_handling (TREE_TYPE (orig_index));
/* If we don't have a default-label, create one here,
after the body of the switch. */
if (thiscase->data.case_stmt.default_label == 0)
{
thiscase->data.case_stmt.default_label
= build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
expand_label (thiscase->data.case_stmt.default_label);
}
default_label = label_rtx (thiscase->data.case_stmt.default_label);
before_case = get_last_insn ();
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (thiscase->data.case_stmt.case_list
&& thiscase->data.case_stmt.case_list->left)
thiscase->data.case_stmt.case_list
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
= case_tree2list (thiscase->data.case_stmt.case_list, 0);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Simplify the case-list before we count it. */
group_case_nodes (thiscase->data.case_stmt.case_list);
/* Get upper and lower bounds of case values.
Also convert all the case values to the index expr's data type. */
count = 0;
for (n = thiscase->data.case_stmt.case_list; n; n = n->right)
{
/* Check low and high label values are integers. */
if (TREE_CODE (n->low) != INTEGER_CST)
abort ();
if (TREE_CODE (n->high) != INTEGER_CST)
abort ();
n->low = convert (index_type, n->low);
n->high = convert (index_type, n->high);
/* Count the elements and track the largest and smallest
of them (treating them as signed even if they are not). */
if (count++ == 0)
{
minval = n->low;
maxval = n->high;
}
else
{
if (INT_CST_LT (n->low, minval))
minval = n->low;
if (INT_CST_LT (maxval, n->high))
maxval = n->high;
}
/* A range counts double, since it requires two compares. */
if (! tree_int_cst_equal (n->low, n->high))
count++;
}
/* Compute span of values. */
if (count != 0)
range = fold (build (MINUS_EXPR, index_type, maxval, minval));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
end_cleanup_deferral ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (count == 0)
{
expand_expr (index_expr, const0_rtx, VOIDmode, 0);
emit_queue ();
emit_jump (default_label);
}
/* If range of values is much bigger than number of values,
make a sequence of conditional branches instead of a dispatch.
If the switch-index is a constant, do it this way
because we can optimize it. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (count < case_values_threshold ()
|| compare_tree_int (range, 10 * count) > 0
/* RANGE may be signed, and really large ranges will show up
as negative numbers. */
|| compare_tree_int (range, 0) < 0
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#ifndef ASM_OUTPUT_ADDR_DIFF_ELT
|| flag_pic
#endif
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
|| TREE_CODE (index_expr) == INTEGER_CST
|| (TREE_CODE (index_expr) == COMPOUND_EXPR
&& TREE_CODE (TREE_OPERAND (index_expr, 1)) == INTEGER_CST))
{
index = expand_expr (index_expr, NULL_RTX, VOIDmode, 0);
/* If the index is a short or char that we do not have
an insn to handle comparisons directly, convert it to
a full integer now, rather than letting each comparison
generate the conversion. */
if (GET_MODE_CLASS (GET_MODE (index)) == MODE_INT
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& ! have_insn_for (COMPARE, GET_MODE (index)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
enum machine_mode wider_mode;
for (wider_mode = GET_MODE (index); wider_mode != VOIDmode;
wider_mode = GET_MODE_WIDER_MODE (wider_mode))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (have_insn_for (COMPARE, wider_mode))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
index = convert_to_mode (wider_mode, index, unsignedp);
break;
}
}
emit_queue ();
do_pending_stack_adjust ();
index = protect_from_queue (index, 0);
if (GET_CODE (index) == MEM)
index = copy_to_reg (index);
if (GET_CODE (index) == CONST_INT
|| TREE_CODE (index_expr) == INTEGER_CST)
{
/* Make a tree node with the proper constant value
if we don't already have one. */
if (TREE_CODE (index_expr) != INTEGER_CST)
{
index_expr
= build_int_2 (INTVAL (index),
unsignedp || INTVAL (index) >= 0 ? 0 : -1);
index_expr = convert (index_type, index_expr);
}
/* For constant index expressions we need only
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
issue an unconditional branch to the appropriate
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
target code. The job of removing any unreachable
code is left to the optimisation phase if the
"-O" option is specified. */
for (n = thiscase->data.case_stmt.case_list; n; n = n->right)
if (! tree_int_cst_lt (index_expr, n->low)
&& ! tree_int_cst_lt (n->high, index_expr))
break;
if (n)
emit_jump (label_rtx (n->code_label));
else
emit_jump (default_label);
}
else
{
/* If the index expression is not constant we generate
a binary decision tree to select the appropriate
target code. This is done as follows:
The list of cases is rearranged into a binary tree,
nearly optimal assuming equal probability for each case.
The tree is transformed into RTL, eliminating
redundant test conditions at the same time.
If program flow could reach the end of the
decision tree an unconditional jump to the
default code is emitted. */
use_cost_table
= (TREE_CODE (TREE_TYPE (orig_index)) != ENUMERAL_TYPE
&& estimate_case_costs (thiscase->data.case_stmt.case_list));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
balance_case_nodes (&thiscase->data.case_stmt.case_list, NULL);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_case_nodes (index, thiscase->data.case_stmt.case_list,
default_label, index_type);
emit_jump_if_reachable (default_label);
}
}
else
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! try_casesi (index_type, index_expr, minval, range,
table_label, default_label))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
index_type = thiscase->data.case_stmt.nominal_type;
/* Index jumptables from zero for suitable values of
minval to avoid a subtraction. */
if (! optimize_size
&& compare_tree_int (minval, 0) > 0
&& compare_tree_int (minval, 3) < 0)
{
minval = integer_zero_node;
range = maxval;
}
if (! try_tablejump (index_type, index_expr, minval, range,
table_label, default_label))
abort ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Get table of labels to jump to, in order of case index. */
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2002-02-01 18:16:02 +00:00
ncases = tree_low_cst (range, 0) + 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
labelvec = (rtx *) alloca (ncases * sizeof (rtx));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
memset ((char *) labelvec, 0, ncases * sizeof (rtx));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (n = thiscase->data.case_stmt.case_list; n; n = n->right)
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Compute the low and high bounds relative to the minimum
value since that should fit in a HOST_WIDE_INT while the
actual values may not. */
HOST_WIDE_INT i_low
= tree_low_cst (fold (build (MINUS_EXPR, index_type,
n->low, minval)), 1);
HOST_WIDE_INT i_high
= tree_low_cst (fold (build (MINUS_EXPR, index_type,
n->high, minval)), 1);
HOST_WIDE_INT i;
for (i = i_low; i <= i_high; i ++)
labelvec[i]
= gen_rtx_LABEL_REF (Pmode, label_rtx (n->code_label));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Fill in the gaps with the default. */
for (i = 0; i < ncases; i++)
if (labelvec[i] == 0)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
labelvec[i] = gen_rtx_LABEL_REF (Pmode, default_label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Output the table */
emit_label (table_label);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (CASE_VECTOR_PC_RELATIVE || flag_pic)
emit_jump_insn (gen_rtx_ADDR_DIFF_VEC (CASE_VECTOR_MODE,
gen_rtx_LABEL_REF (Pmode, table_label),
gen_rtvec_v (ncases, labelvec),
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const0_rtx, const0_rtx));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
emit_jump_insn (gen_rtx_ADDR_VEC (CASE_VECTOR_MODE,
gen_rtvec_v (ncases, labelvec)));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If the case insn drops through the table,
after the table we must jump to the default-label.
Otherwise record no drop-through after the table. */
#ifdef CASE_DROPS_THROUGH
emit_jump (default_label);
#else
emit_barrier ();
#endif
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
before_case = NEXT_INSN (before_case);
end = get_last_insn ();
if (squeeze_notes (&before_case, &end))
abort ();
reorder_insns (before_case, end,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
thiscase->data.case_stmt.start);
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
else
end_cleanup_deferral ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (thiscase->exit_label)
emit_label (thiscase->exit_label);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
free_case_nodes (case_stack->data.case_stmt.case_list);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
POPSTACK (case_stack);
free_temp_slots ();
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Convert the tree NODE into a list linked by the right field, with the left
field zeroed. RIGHT is used for recursion; it is a list to be placed
rightmost in the resulting list. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
static struct case_node *
case_tree2list (node, right)
struct case_node *node, *right;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
struct case_node *left;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (node->right)
right = case_tree2list (node->right, right);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
node->right = right;
if ((left = node->left))
{
node->left = 0;
return case_tree2list (left, node);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return node;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Generate code to jump to LABEL if OP1 and OP2 are equal. */
static void
do_jump_if_equal (op1, op2, label, unsignedp)
rtx op1, op2, label;
int unsignedp;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (GET_CODE (op1) == CONST_INT && GET_CODE (op2) == CONST_INT)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
if (INTVAL (op1) == INTVAL (op2))
emit_jump (label);
}
else
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (op1, op2, EQ, NULL_RTX,
(GET_MODE (op1) == VOIDmode
? GET_MODE (op2) : GET_MODE (op1)),
unsignedp, label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Not all case values are encountered equally. This function
uses a heuristic to weight case labels, in cases where that
looks like a reasonable thing to do.
Right now, all we try to guess is text, and we establish the
following weights:
chars above space: 16
digits: 16
default: 12
space, punct: 8
tab: 4
newline: 2
other "\" chars: 1
remaining chars: 0
If we find any cases in the switch that are not either -1 or in the range
of valid ASCII characters, or are control characters other than those
commonly used with "\", don't treat this switch scanning text.
Return 1 if these nodes are suitable for cost estimation, otherwise
return 0. */
static int
estimate_case_costs (node)
case_node_ptr node;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tree min_ascii = integer_minus_one_node;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
tree max_ascii = convert (TREE_TYPE (node->high), build_int_2 (127, 0));
case_node_ptr n;
int i;
/* If we haven't already made the cost table, make it now. Note that the
lower bound of the table is -1, not zero. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (! cost_table_initialized)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
cost_table_initialized = 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (i = 0; i < 128; i++)
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (ISALNUM (i))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
COST_TABLE (i) = 16;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
else if (ISPUNCT (i))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
COST_TABLE (i) = 8;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
else if (ISCNTRL (i))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
COST_TABLE (i) = -1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
COST_TABLE (' ') = 8;
COST_TABLE ('\t') = 4;
COST_TABLE ('\0') = 4;
COST_TABLE ('\n') = 2;
COST_TABLE ('\f') = 1;
COST_TABLE ('\v') = 1;
COST_TABLE ('\b') = 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* See if all the case expressions look like text. It is text if the
constant is >= -1 and the highest constant is <= 127. Do all comparisons
as signed arithmetic since we don't want to ever access cost_table with a
value less than -1. Also check that none of the constants in a range
are strange control characters. */
for (n = node; n; n = n->right)
{
if ((INT_CST_LT (n->low, min_ascii)) || INT_CST_LT (max_ascii, n->high))
return 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
for (i = (HOST_WIDE_INT) TREE_INT_CST_LOW (n->low);
i <= (HOST_WIDE_INT) TREE_INT_CST_LOW (n->high); i++)
if (COST_TABLE (i) < 0)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 0;
}
/* All interesting values are within the range of interesting
ASCII characters. */
return 1;
}
/* Scan an ordered list of case nodes
combining those with consecutive values or ranges.
Eg. three separate entries 1: 2: 3: become one entry 1..3: */
static void
group_case_nodes (head)
case_node_ptr head;
{
case_node_ptr node = head;
while (node)
{
rtx lb = next_real_insn (label_rtx (node->code_label));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rtx lb2;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case_node_ptr np = node;
/* Try to group the successors of NODE with NODE. */
while (((np = np->right) != 0)
/* Do they jump to the same place? */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
&& ((lb2 = next_real_insn (label_rtx (np->code_label))) == lb
|| (lb != 0 && lb2 != 0
&& simplejump_p (lb)
&& simplejump_p (lb2)
&& rtx_equal_p (SET_SRC (PATTERN (lb)),
SET_SRC (PATTERN (lb2)))))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Are their ranges consecutive? */
&& tree_int_cst_equal (np->low,
fold (build (PLUS_EXPR,
TREE_TYPE (node->high),
node->high,
integer_one_node)))
/* An overflow is not consecutive. */
&& tree_int_cst_lt (node->high,
fold (build (PLUS_EXPR,
TREE_TYPE (node->high),
node->high,
integer_one_node))))
{
node->high = np->high;
}
/* NP is the first node after NODE which can't be grouped with it.
Delete the nodes in between, and move on to that node. */
node->right = np;
node = np;
}
}
/* Take an ordered list of case nodes
and transform them into a near optimal binary tree,
on the assumption that any target code selection value is as
likely as any other.
The transformation is performed by splitting the ordered
list into two equal sections plus a pivot. The parts are
then attached to the pivot as left and right branches. Each
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
branch is then transformed recursively. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
static void
balance_case_nodes (head, parent)
case_node_ptr *head;
case_node_ptr parent;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case_node_ptr np;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
np = *head;
if (np)
{
int cost = 0;
int i = 0;
int ranges = 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case_node_ptr *npp;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case_node_ptr left;
/* Count the number of entries on branch. Also count the ranges. */
while (np)
{
if (!tree_int_cst_equal (np->low, np->high))
{
ranges++;
if (use_cost_table)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
cost += COST_TABLE (TREE_INT_CST_LOW (np->high));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
if (use_cost_table)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
cost += COST_TABLE (TREE_INT_CST_LOW (np->low));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
i++;
np = np->right;
}
if (i > 2)
{
/* Split this list if it is long enough for that to help. */
npp = head;
left = *npp;
if (use_cost_table)
{
/* Find the place in the list that bisects the list's total cost,
Here I gets half the total cost. */
int n_moved = 0;
i = (cost + 1) / 2;
while (1)
{
/* Skip nodes while their cost does not reach that amount. */
if (!tree_int_cst_equal ((*npp)->low, (*npp)->high))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
i -= COST_TABLE (TREE_INT_CST_LOW ((*npp)->high));
i -= COST_TABLE (TREE_INT_CST_LOW ((*npp)->low));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (i <= 0)
break;
npp = &(*npp)->right;
n_moved += 1;
}
if (n_moved == 0)
{
/* Leave this branch lopsided, but optimize left-hand
side and fill in `parent' fields for right-hand side. */
np = *head;
np->parent = parent;
balance_case_nodes (&np->left, np);
for (; np->right; np = np->right)
np->right->parent = np;
return;
}
}
/* If there are just three nodes, split at the middle one. */
else if (i == 3)
npp = &(*npp)->right;
else
{
/* Find the place in the list that bisects the list's total cost,
where ranges count as 2.
Here I gets half the total cost. */
i = (i + ranges + 1) / 2;
while (1)
{
/* Skip nodes while their cost does not reach that amount. */
if (!tree_int_cst_equal ((*npp)->low, (*npp)->high))
i--;
i--;
if (i <= 0)
break;
npp = &(*npp)->right;
}
}
*head = np = *npp;
*npp = 0;
np->parent = parent;
np->left = left;
/* Optimize each of the two split parts. */
balance_case_nodes (&np->left, np);
balance_case_nodes (&np->right, np);
}
else
{
/* Else leave this branch as one level,
but fill in `parent' fields. */
np = *head;
np->parent = parent;
for (; np->right; np = np->right)
np->right->parent = np;
}
}
}
/* Search the parent sections of the case node tree
to see if a test for the lower bound of NODE would be redundant.
INDEX_TYPE is the type of the index expression.
The instructions to generate the case decision tree are
output in the same order as nodes are processed so it is
known that if a parent node checks the range of the current
node minus one that the current node is bounded at its lower
span. Thus the test would be redundant. */
static int
node_has_low_bound (node, index_type)
case_node_ptr node;
tree index_type;
{
tree low_minus_one;
case_node_ptr pnode;
/* If the lower bound of this node is the lowest value in the index type,
we need not test it. */
if (tree_int_cst_equal (node->low, TYPE_MIN_VALUE (index_type)))
return 1;
/* If this node has a left branch, the value at the left must be less
than that at this node, so it cannot be bounded at the bottom and
we need not bother testing any further. */
if (node->left)
return 0;
low_minus_one = fold (build (MINUS_EXPR, TREE_TYPE (node->low),
node->low, integer_one_node));
/* If the subtraction above overflowed, we can't verify anything.
Otherwise, look for a parent that tests our value - 1. */
if (! tree_int_cst_lt (low_minus_one, node->low))
return 0;
for (pnode = node->parent; pnode; pnode = pnode->parent)
if (tree_int_cst_equal (low_minus_one, pnode->high))
return 1;
return 0;
}
/* Search the parent sections of the case node tree
to see if a test for the upper bound of NODE would be redundant.
INDEX_TYPE is the type of the index expression.
The instructions to generate the case decision tree are
output in the same order as nodes are processed so it is
known that if a parent node checks the range of the current
node plus one that the current node is bounded at its upper
span. Thus the test would be redundant. */
static int
node_has_high_bound (node, index_type)
case_node_ptr node;
tree index_type;
{
tree high_plus_one;
case_node_ptr pnode;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* If there is no upper bound, obviously no test is needed. */
if (TYPE_MAX_VALUE (index_type) == NULL)
return 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If the upper bound of this node is the highest value in the type
of the index expression, we need not test against it. */
if (tree_int_cst_equal (node->high, TYPE_MAX_VALUE (index_type)))
return 1;
/* If this node has a right branch, the value at the right must be greater
than that at this node, so it cannot be bounded at the top and
we need not bother testing any further. */
if (node->right)
return 0;
high_plus_one = fold (build (PLUS_EXPR, TREE_TYPE (node->high),
node->high, integer_one_node));
/* If the addition above overflowed, we can't verify anything.
Otherwise, look for a parent that tests our value + 1. */
if (! tree_int_cst_lt (node->high, high_plus_one))
return 0;
for (pnode = node->parent; pnode; pnode = pnode->parent)
if (tree_int_cst_equal (high_plus_one, pnode->low))
return 1;
return 0;
}
/* Search the parent sections of the
case node tree to see if both tests for the upper and lower
bounds of NODE would be redundant. */
static int
node_is_bounded (node, index_type)
case_node_ptr node;
tree index_type;
{
return (node_has_low_bound (node, index_type)
&& node_has_high_bound (node, index_type));
}
/* Emit an unconditional jump to LABEL unless it would be dead code. */
static void
emit_jump_if_reachable (label)
rtx label;
{
if (GET_CODE (get_last_insn ()) != BARRIER)
emit_jump (label);
}
/* Emit step-by-step code to select a case for the value of INDEX.
The thus generated decision tree follows the form of the
case-node binary tree NODE, whose nodes represent test conditions.
INDEX_TYPE is the type of the index of the switch.
Care is taken to prune redundant tests from the decision tree
by detecting any boundary conditions already checked by
emitted rtx. (See node_has_high_bound, node_has_low_bound
and node_is_bounded, above.)
Where the test conditions can be shown to be redundant we emit
an unconditional jump to the target code. As a further
optimization, the subordinates of a tree node are examined to
check for bounded nodes. In this case conditional and/or
unconditional jumps as a result of the boundary check for the
current node are arranged to target the subordinates associated
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
code for out of bound conditions on the current node.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
We can assume that when control reaches the code generated here,
the index value has already been compared with the parents
of this node, and determined to be on the same side of each parent
as this node is. Thus, if this node tests for the value 51,
and a parent tested for 52, we don't need to consider
the possibility of a value greater than 51. If another parent
tests for the value 50, then this node need not test anything. */
static void
emit_case_nodes (index, node, default_label, index_type)
rtx index;
case_node_ptr node;
rtx default_label;
tree index_type;
{
/* If INDEX has an unsigned type, we must make unsigned branches. */
int unsignedp = TREE_UNSIGNED (index_type);
enum machine_mode mode = GET_MODE (index);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
enum machine_mode imode = TYPE_MODE (index_type);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* See if our parents have already tested everything for us.
If they have, emit an unconditional jump for this node. */
if (node_is_bounded (node, index_type))
emit_jump (label_rtx (node->code_label));
else if (tree_int_cst_equal (node->low, node->high))
{
/* Node is single valued. First see if the index expression matches
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
this node and then check our children, if any. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
do_jump_if_equal (index,
convert_modes (mode, imode,
expand_expr (node->low, NULL_RTX,
VOIDmode, 0),
unsignedp),
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
label_rtx (node->code_label), unsignedp);
if (node->right != 0 && node->left != 0)
{
/* This node has children on both sides.
Dispatch to one side or the other
by comparing the index value with this node's value.
If one subtree is bounded, check that one first,
so we can avoid real branches in the tree. */
if (node_is_bounded (node->right, index_type))
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->high, NULL_RTX,
VOIDmode, 0),
unsignedp),
GT, NULL_RTX, mode, unsignedp,
label_rtx (node->right->code_label));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_case_nodes (index, node->left, default_label, index_type);
}
else if (node_is_bounded (node->left, index_type))
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->high, NULL_RTX,
VOIDmode, 0),
unsignedp),
LT, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
label_rtx (node->left->code_label));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_case_nodes (index, node->right, default_label, index_type);
}
else
{
/* Neither node is bounded. First distinguish the two sides;
then emit the code for one side at a time. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
tree test_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* See if the value is on the right. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->high, NULL_RTX,
VOIDmode, 0),
unsignedp),
GT, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
label_rtx (test_label));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Value must be on the left.
Handle the left-hand subtree. */
emit_case_nodes (index, node->left, default_label, index_type);
/* If left-hand subtree does nothing,
go to default. */
emit_jump_if_reachable (default_label);
/* Code branches here for the right-hand subtree. */
expand_label (test_label);
emit_case_nodes (index, node->right, default_label, index_type);
}
}
else if (node->right != 0 && node->left == 0)
{
/* Here we have a right child but no left so we issue conditional
branch to default and process the right child.
Omit the conditional branch to default if we it avoid only one
right child; it costs too much space to save so little time. */
if (node->right->right || node->right->left
|| !tree_int_cst_equal (node->right->low, node->right->high))
{
if (!node_has_low_bound (node, index_type))
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->high, NULL_RTX,
VOIDmode, 0),
unsignedp),
LT, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
default_label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
emit_case_nodes (index, node->right, default_label, index_type);
}
else
/* We cannot process node->right normally
since we haven't ruled out the numbers less than
this node's value. So handle node->right explicitly. */
do_jump_if_equal (index,
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
convert_modes
(mode, imode,
expand_expr (node->right->low, NULL_RTX,
VOIDmode, 0),
unsignedp),
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
label_rtx (node->right->code_label), unsignedp);
}
else if (node->right == 0 && node->left != 0)
{
/* Just one subtree, on the left. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (node->left->left || node->left->right
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
|| !tree_int_cst_equal (node->left->low, node->left->high))
{
if (!node_has_high_bound (node, index_type))
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->high, NULL_RTX,
VOIDmode, 0),
unsignedp),
GT, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
default_label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
emit_case_nodes (index, node->left, default_label, index_type);
}
else
/* We cannot process node->left normally
since we haven't ruled out the numbers less than
this node's value. So handle node->left explicitly. */
do_jump_if_equal (index,
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
convert_modes
(mode, imode,
expand_expr (node->left->low, NULL_RTX,
VOIDmode, 0),
unsignedp),
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
label_rtx (node->left->code_label), unsignedp);
}
}
else
{
/* Node is a range. These cases are very similar to those for a single
value, except that we do not start by testing whether this node
is the one to branch to. */
if (node->right != 0 && node->left != 0)
{
/* Node has subtrees on both sides.
If the right-hand subtree is bounded,
test for it first, since we can go straight there.
Otherwise, we need to make a branch in the control structure,
then handle the two subtrees. */
tree test_label = 0;
if (node_is_bounded (node->right, index_type))
/* Right hand node is fully bounded so we can eliminate any
testing and branch directly to the target code. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->high, NULL_RTX,
VOIDmode, 0),
unsignedp),
GT, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
label_rtx (node->right->code_label));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else
{
/* Right hand node requires testing.
Branch to a label where we will handle it later. */
test_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->high, NULL_RTX,
VOIDmode, 0),
unsignedp),
GT, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
label_rtx (test_label));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Value belongs to this node or to the left-hand subtree. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->low, NULL_RTX,
VOIDmode, 0),
unsignedp),
GE, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
label_rtx (node->code_label));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Handle the left-hand subtree. */
emit_case_nodes (index, node->left, default_label, index_type);
/* If right node had to be handled later, do that now. */
if (test_label)
{
/* If the left-hand subtree fell through,
don't let it fall into the right-hand subtree. */
emit_jump_if_reachable (default_label);
expand_label (test_label);
emit_case_nodes (index, node->right, default_label, index_type);
}
}
else if (node->right != 0 && node->left == 0)
{
/* Deal with values to the left of this node,
if they are possible. */
if (!node_has_low_bound (node, index_type))
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->low, NULL_RTX,
VOIDmode, 0),
unsignedp),
LT, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
default_label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Value belongs to this node or to the right-hand subtree. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->high, NULL_RTX,
VOIDmode, 0),
unsignedp),
LE, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
label_rtx (node->code_label));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_case_nodes (index, node->right, default_label, index_type);
}
else if (node->right == 0 && node->left != 0)
{
/* Deal with values to the right of this node,
if they are possible. */
if (!node_has_high_bound (node, index_type))
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->high, NULL_RTX,
VOIDmode, 0),
unsignedp),
GT, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
default_label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Value belongs to this node or to the left-hand subtree. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->low, NULL_RTX,
VOIDmode, 0),
unsignedp),
GE, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
label_rtx (node->code_label));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_case_nodes (index, node->left, default_label, index_type);
}
else
{
/* Node has no children so we check low and high bounds to remove
redundant tests. Only one of the bounds can exist,
since otherwise this node is bounded--a case tested already. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int high_bound = node_has_high_bound (node, index_type);
int low_bound = node_has_low_bound (node, index_type);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (!high_bound && low_bound)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->high, NULL_RTX,
VOIDmode, 0),
unsignedp),
GT, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
default_label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (!low_bound && high_bound)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
emit_cmp_and_jump_insns (index,
convert_modes
(mode, imode,
expand_expr (node->low, NULL_RTX,
VOIDmode, 0),
unsignedp),
LT, NULL_RTX, mode, unsignedp,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
default_label);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (!low_bound && !high_bound)
{
/* Widen LOW and HIGH to the same width as INDEX. */
tree type = type_for_mode (mode, unsignedp);
tree low = build1 (CONVERT_EXPR, type, node->low);
tree high = build1 (CONVERT_EXPR, type, node->high);
rtx low_rtx, new_index, new_bound;
/* Instead of doing two branches, emit one unsigned branch for
(index-low) > (high-low). */
low_rtx = expand_expr (low, NULL_RTX, mode, 0);
new_index = expand_simple_binop (mode, MINUS, index, low_rtx,
NULL_RTX, unsignedp,
OPTAB_WIDEN);
new_bound = expand_expr (fold (build (MINUS_EXPR, type,
high, low)),
NULL_RTX, mode, 0);
emit_cmp_and_jump_insns (new_index, new_bound, GT, NULL_RTX,
mode, 1, default_label);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
emit_jump (label_rtx (node->code_label));
}
}
}
Reference in New Issue Copy Permalink