d4691e641b
non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
127 lines
5.3 KiB
C
127 lines
5.3 KiB
C
/* Function integration definitions for GNU C-Compiler
|
|
Copyright (C) 1990 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU CC.
|
|
|
|
GNU CC 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.
|
|
|
|
GNU CC 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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU CC; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/* This structure is used to remap objects in the function being inlined to
|
|
those belonging to the calling function. It is passed by
|
|
expand_inline_function to its children.
|
|
|
|
This structure is also used when unrolling loops and otherwise
|
|
replicating code, although not all fields are needed in this case;
|
|
only those fields needed by copy_rtx_and_substitute() and its children
|
|
are used.
|
|
|
|
This structure is used instead of static variables because
|
|
expand_inline_function may be called recursively via expand_expr. */
|
|
|
|
struct inline_remap
|
|
{
|
|
/* True if we are doing function integration, false otherwise.
|
|
Used to control whether RTX_UNCHANGING bits are copied by
|
|
copy_rtx_and_substitute. */
|
|
int integrating;
|
|
/* Definition of function be inlined. */
|
|
union tree_node *fndecl;
|
|
/* Place to put insns needed at start of function. */
|
|
rtx insns_at_start;
|
|
/* Mapping from old registers to new registers.
|
|
It is allocated and deallocated in `expand_inline_function' */
|
|
rtx *reg_map;
|
|
/* Mapping from old code-labels to new code-labels.
|
|
The first element of this map is label_map[min_labelno]. */
|
|
rtx *label_map;
|
|
/* Mapping from old insn uid's to copied insns. The first element
|
|
of this map is insn_map[min_insnno]; the last element is
|
|
insn_map[max_insnno]. We keep the bounds here for when the map
|
|
only covers a partial range of insns (such as loop unrolling or
|
|
code replication). */
|
|
rtx *insn_map;
|
|
int min_insnno, max_insnno;
|
|
|
|
/* Map pseudo reg number in calling function to equivalent constant. We
|
|
cannot in general substitute constants into parameter pseudo registers,
|
|
since some machine descriptions (many RISCs) won't always handle
|
|
the resulting insns. So if an incoming parameter has a constant
|
|
equivalent, we record it here, and if the resulting insn is
|
|
recognizable, we go with it.
|
|
|
|
We also use this mechanism to convert references to incoming arguments
|
|
and stacked variables. copy_rtx_and_substitute will replace the virtual
|
|
incoming argument and virtual stacked variables registers with new
|
|
pseudos that contain pointers into the replacement area allocated for
|
|
this inline instance. These pseudos are then marked as being equivalent
|
|
to the appropriate address and substituted if valid. */
|
|
rtx *const_equiv_map;
|
|
/* Number of entries in const_equiv_map and const_arg_map. */
|
|
int const_equiv_map_size;
|
|
/* This is incremented for each new basic block.
|
|
It is used to store in const_age_map to record the domain of validity
|
|
of each entry in const_equiv_map.
|
|
A value of -1 indicates an entry for a reg which is a parm.
|
|
All other values are "positive". */
|
|
#define CONST_AGE_PARM (-1)
|
|
unsigned int const_age;
|
|
/* In parallel with const_equiv_map, record the valid age for each entry.
|
|
The entry is invalid if its age is less than const_age. */
|
|
unsigned int *const_age_map;
|
|
/* Target of the inline function being expanded, or NULL if none. */
|
|
rtx inline_target;
|
|
/* When an insn is being copied by copy_rtx_and_substitute,
|
|
this is nonzero if we have copied an ASM_OPERANDS.
|
|
In that case, it is the original input-operand vector. */
|
|
rtvec orig_asm_operands_vector;
|
|
/* When an insn is being copied by copy_rtx_and_substitute,
|
|
this is nonzero if we have copied an ASM_OPERANDS.
|
|
In that case, it is the copied input-operand vector. */
|
|
rtvec copy_asm_operands_vector;
|
|
/* Likewise, this is the copied constraints vector. */
|
|
rtvec copy_asm_constraints_vector;
|
|
|
|
/* The next few fields are used for subst_constants to record the SETs
|
|
that it saw. */
|
|
int num_sets;
|
|
struct equiv_table
|
|
{
|
|
rtx dest;
|
|
rtx equiv;
|
|
} equiv_sets[MAX_RECOG_OPERANDS];
|
|
/* Record the last thing assigned to pc. This is used for folded
|
|
conditional branch insns. */
|
|
rtx last_pc_value;
|
|
#ifdef HAVE_cc0
|
|
/* Record the last thing assigned to cc0. */
|
|
rtx last_cc0_value;
|
|
#endif
|
|
};
|
|
|
|
/* Return a copy of an rtx (as needed), substituting pseudo-register,
|
|
labels, and frame-pointer offsets as necessary. */
|
|
extern rtx copy_rtx_and_substitute PROTO((rtx, struct inline_remap *));
|
|
|
|
extern void try_constants PROTO((rtx, struct inline_remap *));
|
|
|
|
extern void mark_stores PROTO((rtx, rtx));
|
|
|
|
/* Unfortunately, we need a global copy of const_equiv map for communication
|
|
with a function called from note_stores. Be *very* careful that this
|
|
is used properly in the presence of recursion. */
|
|
|
|
extern rtx *global_const_equiv_map;
|
|
extern int global_const_equiv_map_size;
|