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freebsd-skq/contrib/gcc/global.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
/* Allocate registers for pseudo-registers that span basic blocks.
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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, 1991, 1994, 1996, 1997, 1998,
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
1999, 2000, 2002, 2003, 2004, 2005 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, 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
#include "config.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "system.h"
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
#include "coretypes.h"
#include "tm.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "machmode.h"
#include "hard-reg-set.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"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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"
#include "regs.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 "function.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 "insn-config.h"
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
#include "recog.h"
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
#include "reload.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 "output.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "toplev.h"
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
#include "tree-pass.h"
#include "timevar.h"
#include "vecprim.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
/* This pass of the compiler performs global register allocation.
It assigns hard register numbers to all the pseudo registers
that were not handled in local_alloc. Assignments are recorded
in the vector reg_renumber, not by changing the rtl code.
(Such changes are made by final). The entry point is
the function global_alloc.
After allocation is complete, the reload pass is run as a subroutine
of this pass, so that when a pseudo reg loses its hard reg due to
spilling it is possible to make a second attempt to find a hard
reg for it. The reload pass is independent in other respects
and it is run even when stupid register allocation is in use.
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
1. Assign allocation-numbers (allocnos) to the pseudo-registers
still needing allocations and to the pseudo-registers currently
allocated by local-alloc which may be spilled by reload.
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
Set up tables reg_allocno and allocno_reg to map
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
reg numbers to allocnos and vice versa.
max_allocno gets the number of allocnos in use.
2. Allocate a max_allocno by max_allocno conflict bit matrix and clear it.
Allocate a max_allocno by FIRST_PSEUDO_REGISTER conflict matrix
for conflicts between allocnos and explicit hard register use
(which includes use of pseudo-registers allocated by local_alloc).
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
3. For each basic 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
walk forward through the block, recording which
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
pseudo-registers and which hardware registers are live.
Build the conflict matrix between the pseudo-registers
and another of pseudo-registers versus hardware registers.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Also record the preferred hardware registers
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for each pseudo-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
4. Sort a table of the allocnos into order of
desirability of the variables.
5. Allocate the variables in that order; each if possible into
a preferred register, else into another register. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Number of pseudo-registers which are candidates for allocation. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 max_allocno;
/* Indexed by (pseudo) reg number, gives the allocno, or -1
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for pseudo registers which are not to be allocated. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
static int *reg_allocno;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 allocno
{
int reg;
/* Gives the number of consecutive hard registers needed by that
pseudo reg. */
int size;
/* Number of calls crossed by each allocno. */
int calls_crossed;
Gcc 3.4.6 as of 2006/08/25 #116475.
2006-08-26 21:29:10 +00:00
/* Number of calls that might throw crossed by each allocno. */
int throwing_calls_crossed;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Number of refs to each allocno. */
int n_refs;
/* Frequency of uses of each allocno. */
int freq;
/* Guess at live length of each allocno.
This is actually the max of the live lengths of the regs. */
int live_length;
/* Set of hard regs conflicting with allocno N. */
HARD_REG_SET hard_reg_conflicts;
/* Set of hard regs preferred by allocno N.
This is used to make allocnos go into regs that are copied to or from them,
when possible, to reduce register shuffling. */
HARD_REG_SET hard_reg_preferences;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
/* Similar, but just counts register preferences made in simple copy
operations, rather than arithmetic. These are given priority because
we can always eliminate an insn by using these, but using a register
in the above list won't always eliminate an insn. */
HARD_REG_SET hard_reg_copy_preferences;
/* Similar to hard_reg_preferences, but includes bits for subsequent
registers when an allocno is multi-word. The above variable is used for
allocation while this is used to build reg_someone_prefers, below. */
HARD_REG_SET hard_reg_full_preferences;
/* Set of hard registers that some later allocno has a preference for. */
HARD_REG_SET regs_someone_prefers;
Gcc 3.2.2-release.
2003-02-10 05:41:50 +00:00
#ifdef STACK_REGS
/* Set to true if allocno can't be allocated in the stack register. */
bool no_stack_reg;
#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
};
static struct allocno *allocno;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* A vector of the integers from 0 to max_allocno-1,
sorted in the order of first-to-be-allocated first. */
static int *allocno_order;
/* Indexed by (pseudo) reg number, gives the number of another
lower-numbered pseudo reg which can share a hard reg with this pseudo
*even if the two pseudos would otherwise appear to conflict*. */
static int *reg_may_share;
/* Define the number of bits in each element of `conflicts' and what
type that element has. We use the largest integer format on the
host machine. */
#define INT_BITS HOST_BITS_PER_WIDE_INT
#define INT_TYPE HOST_WIDE_INT
/* max_allocno by max_allocno array of bits,
recording whether two allocno's conflict (can't go in the same
hardware register).
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
`conflicts' is symmetric after the call to mirror_conflicts. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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_TYPE *conflicts;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Number of ints required to hold max_allocno bits.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 is the length of a row in `conflicts'. */
static int allocno_row_words;
/* Two macros to test or store 1 in an element of `conflicts'. */
#define CONFLICTP(I, 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
(conflicts[(I) * allocno_row_words + (unsigned) (J) / INT_BITS] \
& ((INT_TYPE) 1 << ((unsigned) (J) % INT_BITS)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
/* For any allocno set in ALLOCNO_SET, set ALLOCNO to that allocno,
and execute CODE. */
#define EXECUTE_IF_SET_IN_ALLOCNO_SET(ALLOCNO_SET, ALLOCNO, CODE) \
do { \
int i_; \
int allocno_; \
INT_TYPE *p_ = (ALLOCNO_SET); \
\
for (i_ = allocno_row_words - 1, allocno_ = 0; i_ >= 0; \
i_--, allocno_ += INT_BITS) \
{ \
unsigned INT_TYPE word_ = (unsigned INT_TYPE) *p_++; \
\
for ((ALLOCNO) = allocno_; word_; word_ >>= 1, (ALLOCNO)++) \
{ \
if (word_ & 1) \
{CODE;} \
} \
} \
} while (0)
/* This doesn't work for non-GNU C due to the way CODE is macro expanded. */
#if 0
/* For any allocno that conflicts with IN_ALLOCNO, set OUT_ALLOCNO to
the conflicting allocno, and execute CODE. This macro assumes that
mirror_conflicts has been run. */
#define EXECUTE_IF_CONFLICT(IN_ALLOCNO, OUT_ALLOCNO, CODE)\
EXECUTE_IF_SET_IN_ALLOCNO_SET (conflicts + (IN_ALLOCNO) * allocno_row_words,\
OUT_ALLOCNO, (CODE))
#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
/* Set of hard regs currently live (during scan of all insns). */
static HARD_REG_SET hard_regs_live;
/* Set of registers that global-alloc isn't supposed to use. */
static HARD_REG_SET no_global_alloc_regs;
/* Set of registers used so far. */
static HARD_REG_SET regs_used_so_far;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Number of refs to each hard reg, as used by local alloc.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
It is zero for a reg that contains global pseudos or is explicitly used. */
static int local_reg_n_refs[FIRST_PSEUDO_REGISTER];
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Frequency of uses of given hard reg. */
static int local_reg_freq[FIRST_PSEUDO_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
/* Guess at live length of each hard reg, as used by local alloc.
This is actually the sum of the live lengths of the specific regs. */
static int local_reg_live_length[FIRST_PSEUDO_REGISTER];
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* Set to 1 a bit in a vector TABLE of HARD_REG_SETs, for vector
element I, and hard register number 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
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#define SET_REGBIT(TABLE, I, J) SET_HARD_REG_BIT (allocno[I].TABLE, 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
/* Bit mask for allocnos live at current point in the scan. */
static INT_TYPE *allocnos_live;
/* Test, set or clear bit number I in allocnos_live,
a bit vector indexed by allocno. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#define SET_ALLOCNO_LIVE(I) \
(allocnos_live[(unsigned) (I) / INT_BITS] \
|= ((INT_TYPE) 1 << ((unsigned) (I) % INT_BITS)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
#define CLEAR_ALLOCNO_LIVE(I) \
(allocnos_live[(unsigned) (I) / INT_BITS] \
&= ~((INT_TYPE) 1 << ((unsigned) (I) % INT_BITS)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 is turned off because it doesn't work right for DImode.
(And it is only used for DImode, so the other cases are worthless.)
The problem is that it isn't true that there is NO possibility of conflict;
only that there is no conflict if the two pseudos get the exact same regs.
If they were allocated with a partial overlap, there would be a conflict.
We can't safely turn off the conflict unless we have another way to
prevent the partial overlap.
Idea: change hard_reg_conflicts so that instead of recording which
hard regs the allocno may not overlap, it records where the allocno
may not start. Change both where it is used and where it is updated.
Then there is a way to record that (reg:DI 108) may start at 10
but not at 9 or 11. There is still the question of how to record
this semi-conflict between two pseudos. */
#if 0
/* Reg pairs for which conflict after the current insn
is inhibited by a REG_NO_CONFLICT note.
If the table gets full, we ignore any other notes--that is conservative. */
#define NUM_NO_CONFLICT_PAIRS 4
/* Number of pairs in use in this insn. */
int n_no_conflict_pairs;
static struct { int allocno1, allocno2;}
no_conflict_pairs[NUM_NO_CONFLICT_PAIRS];
#endif /* 0 */
/* Record all regs that are set in any one insn.
Communication from mark_reg_{store,clobber} and global_conflicts. */
static rtx *regs_set;
static int n_regs_set;
/* All registers that can be eliminated. */
static HARD_REG_SET eliminable_regset;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
static int allocno_compare (const void *, const void *);
static void global_conflicts (void);
static void mirror_conflicts (void);
static void expand_preferences (void);
static void prune_preferences (void);
static void find_reg (int, HARD_REG_SET, int, int, int);
static void record_one_conflict (int);
static void record_conflicts (int *, int);
static void mark_reg_store (rtx, rtx, void *);
static void mark_reg_clobber (rtx, rtx, void *);
static void mark_reg_conflicts (rtx);
static void mark_reg_death (rtx);
static void mark_reg_live_nc (int, enum machine_mode);
static void set_preference (rtx, rtx);
static void dump_conflicts (FILE *);
static void reg_becomes_live (rtx, rtx, void *);
static void reg_dies (int, enum machine_mode, struct insn_chain *);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static void allocate_bb_info (void);
static void free_bb_info (void);
static bool check_earlyclobber (rtx);
static void mark_reg_use_for_earlyclobber_1 (rtx *, void *);
static int mark_reg_use_for_earlyclobber (rtx *, void *);
static void calculate_local_reg_bb_info (void);
static void set_up_bb_rts_numbers (void);
static int rpost_cmp (const void *, const void *);
static void calculate_reg_pav (void);
static void modify_reg_pav (void);
static void make_accurate_live_analysis (void);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +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
/* Perform allocation of pseudo-registers not allocated by local_alloc.
Return value is nonzero if reload failed
and we must not do any more for this function. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static int
global_alloc (void)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
int 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
#ifdef ELIMINABLE_REGS
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 const struct {const int from, to; } eliminables[] = ELIMINABLE_REGS;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
int need_fp
= (! flag_omit_frame_pointer
|| (current_function_calls_alloca && EXIT_IGNORE_STACK)
|| FRAME_POINTER_REQUIRED);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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_t 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
rtx x;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
make_accurate_live_analysis ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
max_allocno = 0;
/* A machine may have certain hard registers that
are safe to use only within a basic block. */
CLEAR_HARD_REG_SET (no_global_alloc_regs);
/* Build the regset of all eliminable registers and show we can't use those
that we already know won't be eliminated. */
#ifdef ELIMINABLE_REGS
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (eliminables); 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
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
bool cannot_elim
= (! CAN_ELIMINATE (eliminables[i].from, eliminables[i].to)
|| (eliminables[i].to == STACK_POINTER_REGNUM && need_fp));
if (!regs_asm_clobbered[eliminables[i].from])
{
SET_HARD_REG_BIT (eliminable_regset, eliminables[i].from);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (cannot_elim)
SET_HARD_REG_BIT (no_global_alloc_regs, eliminables[i].from);
}
else if (cannot_elim)
error ("%s cannot be used in asm here",
reg_names[eliminables[i].from]);
else
regs_ever_live[eliminables[i].from] = 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 FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (!regs_asm_clobbered[HARD_FRAME_POINTER_REGNUM])
{
SET_HARD_REG_BIT (eliminable_regset, HARD_FRAME_POINTER_REGNUM);
if (need_fp)
SET_HARD_REG_BIT (no_global_alloc_regs, HARD_FRAME_POINTER_REGNUM);
}
else if (need_fp)
error ("%s cannot be used in asm here",
reg_names[HARD_FRAME_POINTER_REGNUM]);
else
regs_ever_live[HARD_FRAME_POINTER_REGNUM] = 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
#endif
#else
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (!regs_asm_clobbered[FRAME_POINTER_REGNUM])
{
SET_HARD_REG_BIT (eliminable_regset, FRAME_POINTER_REGNUM);
if (need_fp)
SET_HARD_REG_BIT (no_global_alloc_regs, FRAME_POINTER_REGNUM);
}
else if (need_fp)
error ("%s cannot be used in asm here", reg_names[FRAME_POINTER_REGNUM]);
else
regs_ever_live[FRAME_POINTER_REGNUM] = 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
#endif
/* Track which registers have already been used. Start with registers
explicitly in the rtl, then registers allocated by local register
allocation. */
CLEAR_HARD_REG_SET (regs_used_so_far);
#ifdef LEAF_REGISTERS
/* If we are doing the leaf function optimization, and this is a leaf
function, it means that the registers that take work to save are those
that need a register window. So prefer the ones that can be used in
a leaf function. */
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
const char *cheap_regs;
const char *const leaf_regs = LEAF_REGISTERS;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (only_leaf_regs_used () && leaf_function_p ())
cheap_regs = leaf_regs;
else
cheap_regs = call_used_regs;
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (regs_ever_live[i] || cheap_regs[i])
SET_HARD_REG_BIT (regs_used_so_far, i);
}
#else
/* We consider registers that do not have to be saved over calls as if
they were already used since there is no cost in using them. */
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (regs_ever_live[i] || call_used_regs[i])
SET_HARD_REG_BIT (regs_used_so_far, i);
#endif
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for (i = FIRST_PSEUDO_REGISTER; i < (size_t) max_regno; 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
if (reg_renumber[i] >= 0)
SET_HARD_REG_BIT (regs_used_so_far, reg_renumber[i]);
/* Establish mappings from register number to allocation number
and vice versa. In the process, count the allocnos. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
reg_allocno = XNEWVEC (int, max_regno);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 < FIRST_PSEUDO_REGISTER; i++)
reg_allocno[i] = -1;
/* Initialize the shared-hard-reg mapping
from the list of pairs that may share. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
reg_may_share = XCNEWVEC (int, max_regno);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (x = regs_may_share; x; x = XEXP (XEXP (x, 1), 1))
{
int r1 = REGNO (XEXP (x, 0));
int r2 = REGNO (XEXP (XEXP (x, 1), 0));
if (r1 > r2)
reg_may_share[r1] = r2;
else
reg_may_share[r2] = r1;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for (i = FIRST_PSEUDO_REGISTER; i < (size_t) max_regno; 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
/* Note that reg_live_length[i] < 0 indicates a "constant" reg
that we are supposed to refrain from putting in a hard reg.
-2 means do make an allocno but don't allocate it. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (REG_N_REFS (i) != 0 && REG_LIVE_LENGTH (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
/* Don't allocate pseudos that cross calls,
if this function receives a nonlocal goto. */
&& (! current_function_has_nonlocal_label
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
|| REG_N_CALLS_CROSSED (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
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (reg_renumber[i] < 0
&& reg_may_share[i] && reg_allocno[reg_may_share[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
reg_allocno[i] = reg_allocno[reg_may_share[i]];
else
reg_allocno[i] = max_allocno++;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (REG_LIVE_LENGTH (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
reg_allocno[i] = -1;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
allocno = XCNEWVEC (struct allocno, max_allocno);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
for (i = FIRST_PSEUDO_REGISTER; i < (size_t) max_regno; 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
if (reg_allocno[i] >= 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 num = reg_allocno[i];
allocno[num].reg = i;
allocno[num].size = PSEUDO_REGNO_SIZE (i);
allocno[num].calls_crossed += REG_N_CALLS_CROSSED (i);
Gcc 3.4.6 as of 2006/08/25 #116475.
2006-08-26 21:29:10 +00:00
allocno[num].throwing_calls_crossed
+= REG_N_THROWING_CALLS_CROSSED (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
allocno[num].n_refs += REG_N_REFS (i);
allocno[num].freq += REG_FREQ (i);
if (allocno[num].live_length < REG_LIVE_LENGTH (i))
allocno[num].live_length = REG_LIVE_LENGTH (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
}
/* Calculate amount of usage of each hard reg by pseudos
allocated by local-alloc. This is to see if we want to
override it. */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
memset (local_reg_live_length, 0, sizeof local_reg_live_length);
memset (local_reg_n_refs, 0, sizeof local_reg_n_refs);
memset (local_reg_freq, 0, sizeof local_reg_freq);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for (i = FIRST_PSEUDO_REGISTER; i < (size_t) max_regno; i++)
if (reg_renumber[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
{
int regno = reg_renumber[i];
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int endregno = regno + hard_regno_nregs[regno][PSEUDO_REGNO_MODE (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
int j;
for (j = regno; j < endregno; j++)
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
local_reg_n_refs[j] += REG_N_REFS (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
local_reg_freq[j] += REG_FREQ (i);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
local_reg_live_length[j] += REG_LIVE_LENGTH (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
}
}
/* We can't override local-alloc for a reg used not just by local-alloc. */
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (regs_ever_live[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
local_reg_n_refs[i] = 0, local_reg_freq[i] = 0;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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
allocno_row_words = (max_allocno + INT_BITS - 1) / INT_BITS;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* We used to use alloca here, but the size of what it would try to
allocate would occasionally cause it to exceed the stack limit and
cause unpredictable core dumps. Some examples were > 2Mb in size. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
conflicts = XCNEWVEC (INT_TYPE, max_allocno * allocno_row_words);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
allocnos_live = XNEWVEC (INT_TYPE, allocno_row_words);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 work to be done (at least one reg to allocate),
perform global conflict analysis and allocate the regs. */
if (max_allocno > 0)
{
/* Scan all the insns and compute the conflicts among allocnos
and between allocnos and hard regs. */
global_conflicts ();
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
mirror_conflicts ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Eliminate conflicts between pseudos and eliminable registers. If
the register is not eliminated, the pseudo won't really be able to
live in the eliminable register, so the conflict doesn't matter.
If we do eliminate the register, the conflict will no longer exist.
So in either case, we can ignore the conflict. Likewise for
preferences. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for (i = 0; i < (size_t) max_allocno; 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
AND_COMPL_HARD_REG_SET (allocno[i].hard_reg_conflicts,
eliminable_regset);
AND_COMPL_HARD_REG_SET (allocno[i].hard_reg_copy_preferences,
eliminable_regset);
AND_COMPL_HARD_REG_SET (allocno[i].hard_reg_preferences,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
eliminable_regset);
}
/* Try to expand the preferences by merging them between allocnos. */
expand_preferences ();
/* Determine the order to allocate the remaining pseudo registers. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
allocno_order = XNEWVEC (int, max_allocno);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for (i = 0; i < (size_t) max_allocno; 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
allocno_order[i] = i;
/* Default the size to 1, since allocno_compare uses it to divide by.
Also convert allocno_live_length of zero to -1. A length of zero
can occur when all the registers for that allocno have reg_live_length
equal to -2. In this case, we want to make an allocno, but not
allocate it. So avoid the divide-by-zero and set it to a low
priority. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for (i = 0; i < (size_t) max_allocno; 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
if (allocno[i].size == 0)
allocno[i].size = 1;
if (allocno[i].live_length == 0)
allocno[i].live_length = -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
}
qsort (allocno_order, max_allocno, sizeof (int), allocno_compare);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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
prune_preferences ();
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (dump_file)
dump_conflicts (dump_file);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Try allocating them, one by one, in that order,
except for parameters marked with reg_live_length[regno] == -2. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for (i = 0; i < (size_t) max_allocno; 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 (reg_renumber[allocno[allocno_order[i]].reg] < 0
&& REG_LIVE_LENGTH (allocno[allocno_order[i]].reg) >= 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 we have more than one register class,
first try allocating in the class that is cheapest
for this pseudo-reg. If that fails, try any reg. */
if (N_REG_CLASSES > 1)
{
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
find_reg (allocno_order[i], 0, 0, 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
if (reg_renumber[allocno[allocno_order[i]].reg] >= 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
continue;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (reg_alternate_class (allocno[allocno_order[i]].reg) != NO_REGS)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
find_reg (allocno_order[i], 0, 1, 0, 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
free (allocno_order);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Do the reloads now while the allocno data still exists, so that we can
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
try to assign new hard regs to any pseudo regs that are spilled. */
#if 0 /* We need to eliminate regs even if there is no rtl code,
for the sake of debugging information. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (n_basic_blocks > NUM_FIXED_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
#endif
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
build_insn_chain (get_insns ());
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
retval = reload (get_insns (), 1);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +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
/* Clean up. */
free (reg_allocno);
free (reg_may_share);
free (allocno);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
free (conflicts);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (allocnos_live);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 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
}
/* Sort predicate for ordering the allocnos.
Returns -1 (1) if *v1 should be allocated before (after) *v2. */
static int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
allocno_compare (const void *v1p, const void *v2p)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 v1 = *(const int *)v1p, v2 = *(const int *)v2p;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Note that the quotient will never be bigger than
the value of floor_log2 times the maximum number 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
times a register can occur in one insn (surely less than 100)
weighted by the frequency (maximally REG_FREQ_MAX).
Multiplying this by 10000/REG_FREQ_MAX can't overflow. */
int pri1
= (((double) (floor_log2 (allocno[v1].n_refs) * allocno[v1].freq)
/ allocno[v1].live_length)
* (10000 / REG_FREQ_MAX) * allocno[v1].size);
int pri2
= (((double) (floor_log2 (allocno[v2].n_refs) * allocno[v2].freq)
/ allocno[v2].live_length)
* (10000 / REG_FREQ_MAX) * allocno[v2].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
if (pri2 - pri1)
return pri2 - pri1;
/* If regs are equally good, sort by allocno,
so that the results of qsort leave nothing to chance. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return v1 - v2;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Scan the rtl code and record all conflicts and register preferences in the
conflict matrices and preference tables. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
global_conflicts (void)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned i;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
basic_block b;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
int *block_start_allocnos;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 a vector that mark_reg_{store,clobber} will store in. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regs_set = XNEWVEC (rtx, max_parallel * 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
block_start_allocnos = XNEWVEC (int, max_allocno);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
FOR_EACH_BB (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
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
memset (allocnos_live, 0, allocno_row_words * sizeof (INT_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
/* Initialize table of registers currently live
to the state at the beginning of this basic 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
This also marks the conflicts among hard registers
and any allocnos that are live.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 pseudo-regs, there is only one bit for each one
no matter how many hard regs it occupies.
This is ok; we know the size from PSEUDO_REGNO_SIZE.
For explicit hard regs, we cannot know the size that way
since one hard reg can be used with various sizes.
Therefore, we must require that all the hard regs
implicitly live as part of a multi-word hard reg
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
be explicitly marked in basic_block_live_at_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
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regset old = b->il.rtl->global_live_at_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
int ax = 0;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
reg_set_iterator rsi;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
REG_SET_TO_HARD_REG_SET (hard_regs_live, old);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
EXECUTE_IF_SET_IN_REG_SET (old, FIRST_PSEUDO_REGISTER, i, rsi)
{
int a = reg_allocno[i];
if (a >= 0)
{
SET_ALLOCNO_LIVE (a);
block_start_allocnos[ax++] = a;
}
else if ((a = reg_renumber[i]) >= 0)
mark_reg_live_nc (a, PSEUDO_REGNO_MODE (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
/* Record that each allocno now live conflicts with each hard reg
now live.
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
It is not necessary to mark any conflicts between pseudos at
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 point, even for pseudos which are live at the start of
the basic 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
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 two pseudos X and Y and any point in the CFG P.
On any path to point P where X and Y are live one of the
following conditions must be true:
1. X is live at some instruction on the path that
evaluates Y.
2. Y is live at some instruction on the path that
evaluates X.
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
3. Either X or Y is not evaluated on the path to P
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
(i.e. it is used uninitialized) and thus the
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
conflict can be ignored.
In cases #1 and #2 the conflict will be recorded when we
scan the instruction that makes either X or Y become live. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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_conflicts (block_start_allocnos, ax);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
#ifdef EH_RETURN_DATA_REGNO
if (bb_has_eh_pred (b))
{
unsigned int i;
for (i = 0; ; ++i)
{
unsigned int regno = EH_RETURN_DATA_REGNO (i);
if (regno == INVALID_REGNUM)
break;
record_one_conflict (regno);
}
}
#endif
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Pseudos can't go in stack regs at the start of a basic block that
is reached by an abnormal edge. Likewise for call clobbered regs,
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
because caller-save, fixup_abnormal_edges and possibly the table
driven EH machinery are not quite ready to handle such regs live
across such edges. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
edge e;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
edge_iterator ei;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
FOR_EACH_EDGE (e, ei, b->preds)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (e->flags & EDGE_ABNORMAL)
break;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (e != NULL)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
#ifdef STACK_REGS
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
EXECUTE_IF_SET_IN_ALLOCNO_SET (allocnos_live, ax,
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
{
allocno[ax].no_stack_reg = 1;
});
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
for (ax = FIRST_STACK_REG; ax <= LAST_STACK_REG; ax++)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
record_one_conflict (ax);
#endif
/* No need to record conflicts for call clobbered regs if we have
nonlocal labels around, as we don't ever try to allocate such
regs in this case. */
if (! current_function_has_nonlocal_label)
for (ax = 0; ax < FIRST_PSEUDO_REGISTER; ax++)
if (call_used_regs [ax])
record_one_conflict (ax);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
}
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
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
insn = BB_HEAD (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
/* Scan the code of this basic block, noting which allocnos
and hard regs are born or die. When one is born,
record a conflict with all others currently live. */
while (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
RTX_CODE code = GET_CODE (insn);
rtx link;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 regs_set an empty set. */
n_regs_set = 0;
if (code == INSN || code == CALL_INSN || code == JUMP_INSN)
{
#if 0
int i = 0;
for (link = REG_NOTES (insn);
link && i < NUM_NO_CONFLICT_PAIRS;
link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == REG_NO_CONFLICT)
{
no_conflict_pairs[i].allocno1
= reg_allocno[REGNO (SET_DEST (PATTERN (insn)))];
no_conflict_pairs[i].allocno2
= reg_allocno[REGNO (XEXP (link, 0))];
i++;
}
#endif /* 0 */
/* Mark any registers clobbered by INSN as live,
so they conflict with the inputs. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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_stores (PATTERN (insn), mark_reg_clobber, 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
/* Mark any registers dead after INSN as dead now. */
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == REG_DEAD)
mark_reg_death (XEXP (link, 0));
/* Mark any registers set in INSN as live,
and mark them as conflicting with all other live regs.
Clobbers are processed again, so they conflict with
the registers that are set. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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_stores (PATTERN (insn), mark_reg_store, 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
#ifdef AUTO_INC_DEC
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == REG_INC)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
mark_reg_store (XEXP (link, 0), NULL_RTX, 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
#endif
/* If INSN has multiple outputs, then any reg that dies here
and is used inside of an output
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
must conflict with the other outputs.
It is unsafe to use !single_set here since it will ignore an
unused output. Just because an output is unused does not mean
the compiler can assume the side effect will not occur.
Consider if REG appears in the address of an output and we
reload the output. If we allocate REG to the same hard
register as an unused output we could set the hard register
before the output reload insn. */
if (GET_CODE (PATTERN (insn)) == PARALLEL && multiple_sets (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
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == REG_DEAD)
{
int used_in_output = 0;
int i;
rtx reg = XEXP (link, 0);
for (i = XVECLEN (PATTERN (insn), 0) - 1; i >= 0; i--)
{
rtx set = XVECEXP (PATTERN (insn), 0, i);
if (GET_CODE (set) == SET
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& !REG_P (SET_DEST (set))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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_equal_p (reg, SET_DEST (set))
&& reg_overlap_mentioned_p (reg, SET_DEST (set)))
used_in_output = 1;
}
if (used_in_output)
mark_reg_conflicts (reg);
}
/* Mark any registers set in INSN and then never used. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (n_regs_set-- > 0)
{
rtx note = find_regno_note (insn, REG_UNUSED,
REGNO (regs_set[n_regs_set]));
if (note)
mark_reg_death (XEXP (note, 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
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (insn == BB_END (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
break;
insn = NEXT_INSN (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
/* Clean up. */
free (block_start_allocnos);
free (regs_set);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 the preference information by looking for cases where one allocno
dies in an insn that sets an allocno. If those two allocnos don't conflict,
merge any preferences between those allocnos. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
expand_preferences (void)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 insn;
rtx link;
rtx set;
/* We only try to handle the most common cases here. Most of the cases
where this wins are reg-reg copies. */
for (insn = get_insns (); insn; insn = NEXT_INSN (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 (INSN_P (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
&& (set = single_set (insn)) != 0
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (SET_DEST (set))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
&& reg_allocno[REGNO (SET_DEST (set))] >= 0)
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == REG_DEAD
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (XEXP (link, 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
&& reg_allocno[REGNO (XEXP (link, 0))] >= 0
&& ! CONFLICTP (reg_allocno[REGNO (SET_DEST (set))],
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
reg_allocno[REGNO (XEXP (link, 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
{
int a1 = reg_allocno[REGNO (SET_DEST (set))];
int a2 = reg_allocno[REGNO (XEXP (link, 0))];
if (XEXP (link, 0) == SET_SRC (set))
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
IOR_HARD_REG_SET (allocno[a1].hard_reg_copy_preferences,
allocno[a2].hard_reg_copy_preferences);
IOR_HARD_REG_SET (allocno[a2].hard_reg_copy_preferences,
allocno[a1].hard_reg_copy_preferences);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
IOR_HARD_REG_SET (allocno[a1].hard_reg_preferences,
allocno[a2].hard_reg_preferences);
IOR_HARD_REG_SET (allocno[a2].hard_reg_preferences,
allocno[a1].hard_reg_preferences);
IOR_HARD_REG_SET (allocno[a1].hard_reg_full_preferences,
allocno[a2].hard_reg_full_preferences);
IOR_HARD_REG_SET (allocno[a2].hard_reg_full_preferences,
allocno[a1].hard_reg_full_preferences);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
/* Prune the preferences for global registers to exclude registers that cannot
be used.
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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
Compute `regs_someone_prefers', which is a bitmask of the hard registers
that are preferred by conflicting registers of lower priority. If possible,
we will avoid using these registers. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
prune_preferences (void)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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;
int num;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int *allocno_to_order = XNEWVEC (int, max_allocno);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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
/* Scan least most important to most important.
For each allocno, remove from preferences registers that cannot be used,
either because of conflicts or register type. Then compute all registers
preferred by each lower-priority register that conflicts. */
for (i = max_allocno - 1; i >= 0; i--)
{
HARD_REG_SET temp;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
num = allocno_order[i];
allocno_to_order[num] = i;
COPY_HARD_REG_SET (temp, allocno[num].hard_reg_conflicts);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (allocno[num].calls_crossed == 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
IOR_HARD_REG_SET (temp, fixed_reg_set);
else
IOR_HARD_REG_SET (temp, call_used_reg_set);
IOR_COMPL_HARD_REG_SET
(temp,
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
reg_class_contents[(int) reg_preferred_class (allocno[num].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
AND_COMPL_HARD_REG_SET (allocno[num].hard_reg_preferences, temp);
AND_COMPL_HARD_REG_SET (allocno[num].hard_reg_copy_preferences, temp);
AND_COMPL_HARD_REG_SET (allocno[num].hard_reg_full_preferences, temp);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
for (i = max_allocno - 1; i >= 0; 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
/* Merge in the preferences of lower-priority registers (they have
already been pruned). If we also prefer some of those registers,
don't exclude them unless we are of a smaller size (in which case
we want to give the lower-priority allocno the first chance for
these registers). */
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2002-02-01 18:16:02 +00:00
HARD_REG_SET temp, temp2;
int allocno2;
num = allocno_order[i];
CLEAR_HARD_REG_SET (temp);
CLEAR_HARD_REG_SET (temp2);
EXECUTE_IF_SET_IN_ALLOCNO_SET (conflicts + num * allocno_row_words,
allocno2,
{
if (allocno_to_order[allocno2] > i)
{
if (allocno[allocno2].size <= allocno[num].size)
IOR_HARD_REG_SET (temp,
allocno[allocno2].hard_reg_full_preferences);
else
IOR_HARD_REG_SET (temp2,
allocno[allocno2].hard_reg_full_preferences);
}
});
AND_COMPL_HARD_REG_SET (temp, allocno[num].hard_reg_full_preferences);
IOR_HARD_REG_SET (temp, temp2);
COPY_HARD_REG_SET (allocno[num].regs_someone_prefers, temp);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (allocno_to_order);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
/* Assign a hard register to allocno NUM; look for one that is the beginning
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
of a long enough stretch of hard regs none of which conflicts with ALLOCNO.
The registers marked in PREFREGS are tried first.
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
LOSERS, if nonzero, is a HARD_REG_SET indicating registers that cannot
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
be used for this allocation.
If ALT_REGS_P is zero, consider only the preferred class of ALLOCNO's reg.
Otherwise ignore that preferred class and use the alternate class.
If ACCEPT_CALL_CLOBBERED is nonzero, accept a call-clobbered hard reg that
will have to be saved and restored at calls.
RETRYING is nonzero if this is called from retry_global_alloc.
If we find one, record it in reg_renumber.
If not, do nothing. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_reg (int num, HARD_REG_SET losers, int alt_regs_p, int accept_call_clobbered, int retrying)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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, best_reg, pass;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
HARD_REG_SET used, used1, used2;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 reg_class class = (alt_regs_p
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2002-02-01 18:16:02 +00:00
? reg_alternate_class (allocno[num].reg)
: reg_preferred_class (allocno[num].reg));
enum machine_mode mode = PSEUDO_REGNO_MODE (allocno[num].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
if (accept_call_clobbered)
COPY_HARD_REG_SET (used1, call_fixed_reg_set);
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2002-02-01 18:16:02 +00:00
else if (allocno[num].calls_crossed == 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
COPY_HARD_REG_SET (used1, fixed_reg_set);
else
COPY_HARD_REG_SET (used1, call_used_reg_set);
/* Some registers should not be allocated in global-alloc. */
IOR_HARD_REG_SET (used1, no_global_alloc_regs);
if (losers)
IOR_HARD_REG_SET (used1, losers);
IOR_COMPL_HARD_REG_SET (used1, reg_class_contents[(int) class]);
COPY_HARD_REG_SET (used2, used1);
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2002-02-01 18:16:02 +00:00
IOR_HARD_REG_SET (used1, allocno[num].hard_reg_conflicts);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
#ifdef CANNOT_CHANGE_MODE_CLASS
cannot_change_mode_set_regs (&used1, mode, allocno[num].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
#endif
/* Try each hard reg to see if it fits. Do this in two passes.
In the first pass, skip registers that are preferred by some other pseudo
to give it a better chance of getting one of those registers. Only if
we can't get a register when excluding those do we take one of them.
However, we never allocate a register for the first time in pass 0. */
COPY_HARD_REG_SET (used, used1);
IOR_COMPL_HARD_REG_SET (used, regs_used_so_far);
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2002-02-01 18:16:02 +00:00
IOR_HARD_REG_SET (used, allocno[num].regs_someone_prefers);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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
best_reg = -1;
for (i = FIRST_PSEUDO_REGISTER, pass = 0;
pass <= 1 && i >= FIRST_PSEUDO_REGISTER;
pass++)
{
if (pass == 1)
COPY_HARD_REG_SET (used, used1);
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
{
#ifdef REG_ALLOC_ORDER
int regno = reg_alloc_order[i];
#else
int regno = i;
#endif
if (! TEST_HARD_REG_BIT (used, regno)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
&& HARD_REGNO_MODE_OK (regno, 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
&& (allocno[num].calls_crossed == 0
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
|| accept_call_clobbered
|| ! HARD_REGNO_CALL_PART_CLOBBERED (regno, 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
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int lim = regno + hard_regno_nregs[regno][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
for (j = regno + 1;
(j < lim
&& ! TEST_HARD_REG_BIT (used, j));
j++);
if (j == lim)
{
best_reg = regno;
break;
}
#ifndef REG_ALLOC_ORDER
i = j; /* Skip starting points we know will lose */
#endif
}
}
}
/* See if there is a preferred register with the same class as the register
we allocated above. Making this restriction prevents register
preferencing from creating worse register allocation.
Remove from the preferred registers and conflicting registers. Note that
additional conflicts may have been added after `prune_preferences' was
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
called.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
First do this for those register with copy preferences, then all
preferred registers. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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_COMPL_HARD_REG_SET (allocno[num].hard_reg_copy_preferences, used);
GO_IF_HARD_REG_SUBSET (allocno[num].hard_reg_copy_preferences,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
reg_class_contents[(int) NO_REGS], no_copy_prefs);
if (best_reg >= 0)
{
for (i = 0; i < FIRST_PSEUDO_REGISTER; 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 (TEST_HARD_REG_BIT (allocno[num].hard_reg_copy_preferences, 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
&& HARD_REGNO_MODE_OK (i, mode)
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2002-02-01 18:16:02 +00:00
&& (allocno[num].calls_crossed == 0
|| accept_call_clobbered
|| ! HARD_REGNO_CALL_PART_CLOBBERED (i, 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
&& (REGNO_REG_CLASS (i) == REGNO_REG_CLASS (best_reg)
|| reg_class_subset_p (REGNO_REG_CLASS (i),
REGNO_REG_CLASS (best_reg))
|| reg_class_subset_p (REGNO_REG_CLASS (best_reg),
REGNO_REG_CLASS (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
int j;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int lim = i + hard_regno_nregs[i][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
for (j = i + 1;
(j < lim
&& ! TEST_HARD_REG_BIT (used, j)
&& (REGNO_REG_CLASS (j)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
== REGNO_REG_CLASS (best_reg + (j - 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
|| reg_class_subset_p (REGNO_REG_CLASS (j),
REGNO_REG_CLASS (best_reg + (j - i)))
|| reg_class_subset_p (REGNO_REG_CLASS (best_reg + (j - i)),
REGNO_REG_CLASS (j))));
j++);
if (j == lim)
{
best_reg = i;
goto no_prefs;
}
}
}
no_copy_prefs:
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2002-02-01 18:16:02 +00:00
AND_COMPL_HARD_REG_SET (allocno[num].hard_reg_preferences, used);
GO_IF_HARD_REG_SUBSET (allocno[num].hard_reg_preferences,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
reg_class_contents[(int) NO_REGS], no_prefs);
if (best_reg >= 0)
{
for (i = 0; i < FIRST_PSEUDO_REGISTER; 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 (TEST_HARD_REG_BIT (allocno[num].hard_reg_preferences, 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
&& HARD_REGNO_MODE_OK (i, 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
&& (allocno[num].calls_crossed == 0
|| accept_call_clobbered
|| ! HARD_REGNO_CALL_PART_CLOBBERED (i, 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
&& (REGNO_REG_CLASS (i) == REGNO_REG_CLASS (best_reg)
|| reg_class_subset_p (REGNO_REG_CLASS (i),
REGNO_REG_CLASS (best_reg))
|| reg_class_subset_p (REGNO_REG_CLASS (best_reg),
REGNO_REG_CLASS (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
int j;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int lim = i + hard_regno_nregs[i][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
for (j = i + 1;
(j < lim
&& ! TEST_HARD_REG_BIT (used, j)
&& (REGNO_REG_CLASS (j)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
== REGNO_REG_CLASS (best_reg + (j - 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
|| reg_class_subset_p (REGNO_REG_CLASS (j),
REGNO_REG_CLASS (best_reg + (j - i)))
|| reg_class_subset_p (REGNO_REG_CLASS (best_reg + (j - i)),
REGNO_REG_CLASS (j))));
j++);
if (j == lim)
{
best_reg = i;
break;
}
}
}
no_prefs:
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* If we haven't succeeded yet, try with caller-saves.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 not check to see if the current function has nonlocal
labels because we don't put any pseudos that are live over calls in
registers in that case. */
if (flag_caller_saves && best_reg < 0)
{
/* Did not find a register. If it would be profitable to
allocate a call-clobbered register and save and restore it
Gcc 3.4.6 as of 2006/08/25 #116475.
2006-08-26 21:29:10 +00:00
around calls, do that. Don't do this if it crosses any calls
that might throw. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (! accept_call_clobbered
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& allocno[num].calls_crossed != 0
Gcc 3.4.6 as of 2006/08/25 #116475.
2006-08-26 21:29:10 +00:00
&& allocno[num].throwing_calls_crossed == 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
&& CALLER_SAVE_PROFITABLE (allocno[num].n_refs,
allocno[num].calls_crossed))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
HARD_REG_SET new_losers;
if (! losers)
CLEAR_HARD_REG_SET (new_losers);
else
COPY_HARD_REG_SET (new_losers, losers);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
IOR_HARD_REG_SET(new_losers, losing_caller_save_reg_set);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
find_reg (num, new_losers, alt_regs_p, 1, retrying);
if (reg_renumber[allocno[num].reg] >= 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
{
caller_save_needed = 1;
return;
}
}
}
/* If we haven't succeeded yet,
see if some hard reg that conflicts with us
was utilized poorly by local-alloc.
If so, kick out the regs that were put there by local-alloc
so we can use it instead. */
if (best_reg < 0 && !retrying
/* Let's not bother with multi-reg allocnos. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& allocno[num].size == 1
&& REG_BASIC_BLOCK (allocno[num].reg) == REG_BLOCK_GLOBAL)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 from the end, to find the least-used ones first. */
for (i = FIRST_PSEUDO_REGISTER - 1; i >= 0; i--)
{
#ifdef REG_ALLOC_ORDER
int regno = reg_alloc_order[i];
#else
int regno = i;
#endif
if (local_reg_n_refs[regno] != 0
/* Don't use a reg no good for this pseudo. */
&& ! TEST_HARD_REG_BIT (used2, regno)
&& HARD_REGNO_MODE_OK (regno, mode)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* The code below assumes that we need only a single
register, but the check of allocno[num].size above
was not enough. Sometimes we need more than one
register for a single-word value. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& hard_regno_nregs[regno][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
&& (allocno[num].calls_crossed == 0
|| accept_call_clobbered
|| ! HARD_REGNO_CALL_PART_CLOBBERED (regno, mode))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
#ifdef CANNOT_CHANGE_MODE_CLASS
&& ! invalid_mode_change_p (regno, REGNO_REG_CLASS (regno),
mode)
Gcc 3.2.2-release.
2003-02-10 05:41:50 +00:00
#endif
#ifdef STACK_REGS
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
&& (!allocno[num].no_stack_reg
|| regno < FIRST_STACK_REG || regno > LAST_STACK_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
#endif
)
{
/* We explicitly evaluate the divide results into temporary
variables so as to avoid excess precision problems that occur
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
on an i386-unknown-sysv4.2 (unixware) host. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
double tmp1 = ((double) local_reg_freq[regno] * local_reg_n_refs[regno]
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/ local_reg_live_length[regno]);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
double tmp2 = ((double) allocno[num].freq * allocno[num].n_refs
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/ allocno[num].live_length);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (tmp1 < tmp2)
{
/* Hard reg REGNO was used less in total by local regs
than it would be used by this one allocno! */
int k;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (dump_file)
{
fprintf (dump_file, "Regno %d better for global %d, ",
regno, allocno[num].reg);
fprintf (dump_file, "fr:%d, ll:%d, nr:%d ",
allocno[num].freq, allocno[num].live_length,
allocno[num].n_refs);
fprintf (dump_file, "(was: fr:%d, ll:%d, nr:%d)\n",
local_reg_freq[regno],
local_reg_live_length[regno],
local_reg_n_refs[regno]);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (k = 0; k < max_regno; k++)
if (reg_renumber[k] >= 0)
{
int r = reg_renumber[k];
int endregno
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
= r + hard_regno_nregs[r][PSEUDO_REGNO_MODE (k)];
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (regno >= r && regno < endregno)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
{
if (dump_file)
fprintf (dump_file,
"Local Reg %d now on stack\n", k);
reg_renumber[k] = -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
}
best_reg = regno;
break;
}
}
}
}
/* Did we find a register? */
if (best_reg >= 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 lim, 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
HARD_REG_SET this_reg;
/* Yes. Record it as the hard register of this pseudo-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
reg_renumber[allocno[num].reg] = best_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
/* Also of any pseudo-regs that share with 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
if (reg_may_share[allocno[num].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
for (j = FIRST_PSEUDO_REGISTER; j < max_regno; 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
if (reg_allocno[j] == num)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
reg_renumber[j] = best_reg;
/* Make a set of the hard regs being allocated. */
CLEAR_HARD_REG_SET (this_reg);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
lim = best_reg + hard_regno_nregs[best_reg][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
for (j = best_reg; j < lim; j++)
{
SET_HARD_REG_BIT (this_reg, j);
SET_HARD_REG_BIT (regs_used_so_far, j);
/* This is no longer a reg used just by local regs. */
local_reg_n_refs[j] = 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
local_reg_freq[j] = 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 each other pseudo-reg conflicting with this one,
mark it as conflicting with the hard regs this one occupies. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
lim = num;
EXECUTE_IF_SET_IN_ALLOCNO_SET (conflicts + lim * allocno_row_words, j,
{
IOR_HARD_REG_SET (allocno[j].hard_reg_conflicts, this_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
}
}
/* Called from `reload' to look for a hard reg to put pseudo reg REGNO in.
Perhaps it had previously seemed not worth a hard reg,
or perhaps its old hard reg has been commandeered for reloads.
FORBIDDEN_REGS indicates certain hard regs that may not be used, even if
they do not appear to be allocated.
If FORBIDDEN_REGS is zero, no regs are forbidden. */
void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
retry_global_alloc (int regno, HARD_REG_SET forbidden_regs)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 alloc_no = reg_allocno[regno];
if (alloc_no >= 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 we have more than one register class,
first try allocating in the class that is cheapest
for this pseudo-reg. If that fails, try any reg. */
if (N_REG_CLASSES > 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
find_reg (alloc_no, forbidden_regs, 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
if (reg_renumber[regno] < 0
&& reg_alternate_class (regno) != NO_REGS)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
find_reg (alloc_no, forbidden_regs, 1, 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
/* If we found a register, modify the RTL for the register to
show the hard register, and mark that register live. */
if (reg_renumber[regno] >= 0)
{
REGNO (regno_reg_rtx[regno]) = reg_renumber[regno];
mark_home_live (regno);
}
}
}
/* Record a conflict between register REGNO
and everything currently live.
REGNO must not be a pseudo reg that was allocated
by local_alloc; such numbers must be translated through
reg_renumber before calling here. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
record_one_conflict (int regno)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 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
if (regno < FIRST_PSEUDO_REGISTER)
/* When a hard register becomes live,
record conflicts with live pseudo regs. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
EXECUTE_IF_SET_IN_ALLOCNO_SET (allocnos_live, 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
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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_HARD_REG_BIT (allocno[j].hard_reg_conflicts, regno);
});
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
/* When a pseudo-register becomes live,
record conflicts first with hard regs,
then with other pseudo regs. */
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 ialloc = reg_allocno[regno];
int ialloc_prod = ialloc * allocno_row_words;
IOR_HARD_REG_SET (allocno[ialloc].hard_reg_conflicts, hard_regs_live);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (j = allocno_row_words - 1; j >= 0; j--)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
conflicts[ialloc_prod + j] |= allocnos_live[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
}
}
/* Record all allocnos currently live as conflicting
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
with all hard regs currently live.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
ALLOCNO_VEC is a vector of LEN allocnos, all allocnos that
are currently live. Their bits are also flagged in allocnos_live. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
record_conflicts (int *allocno_vec, int len)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
while (--len >= 0)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
IOR_HARD_REG_SET (allocno[allocno_vec[len]].hard_reg_conflicts,
hard_regs_live);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 CONFLICTP (i, j) is true, make sure CONFLICTP (j, i) is also true. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mirror_conflicts (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
{
int i, j;
int rw = allocno_row_words;
int rwb = rw * INT_BITS;
INT_TYPE *p = conflicts;
INT_TYPE *q0 = conflicts, *q1, *q2;
unsigned INT_TYPE mask;
for (i = max_allocno - 1, mask = 1; i >= 0; i--, mask <<= 1)
{
if (! mask)
{
mask = 1;
q0++;
}
for (j = allocno_row_words - 1, q1 = q0; j >= 0; j--, q1 += rwb)
{
unsigned INT_TYPE word;
for (word = (unsigned INT_TYPE) *p++, q2 = q1; word;
word >>= 1, q2 += rw)
{
if (word & 1)
*q2 |= mask;
}
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 case where REG is set by the insn being scanned,
during the forward scan to accumulate conflicts.
Store a 1 in regs_live or allocnos_live for this register, record how many
consecutive hardware registers it actually needs,
and record a conflict with all other registers already live.
Note that even if REG does not remain alive after this insn,
we must mark it here as live, to ensure a conflict between
REG and any other regs set in this insn that really do live.
This is because those other regs could be considered after this.
REG might actually be something other than a register;
if so, we do nothing.
SETTER is 0 if this register was modified by an auto-increment (i.e.,
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
a REG_INC note was found for it). */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_reg_store (rtx reg, rtx setter, void *data ATTRIBUTE_UNUSED)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 regno;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (reg) == 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
reg = SUBREG_REG (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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!REG_P (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
return;
regs_set[n_regs_set++] = reg;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (setter && GET_CODE (setter) != CLOBBER)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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_preference (reg, SET_SRC (setter));
regno = REGNO (reg);
/* Either this is one of the max_allocno pseudo regs not allocated,
or it is or has a hardware reg. First handle the pseudo-regs. */
if (regno >= FIRST_PSEUDO_REGISTER)
{
if (reg_allocno[regno] >= 0)
{
SET_ALLOCNO_LIVE (reg_allocno[regno]);
record_one_conflict (regno);
}
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (reg_renumber[regno] >= 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
regno = reg_renumber[regno];
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
/* Handle hardware regs (and pseudos allocated to hard regs). */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (regno < FIRST_PSEUDO_REGISTER && ! fixed_regs[regno])
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int last = regno + hard_regno_nregs[regno][GET_MODE (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
while (regno < last)
{
record_one_conflict (regno);
SET_HARD_REG_BIT (hard_regs_live, regno);
regno++;
}
}
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Like mark_reg_store except notice just CLOBBERs; ignore SETs. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
mark_reg_clobber (rtx reg, rtx setter, void *data)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
if (GET_CODE (setter) == CLOBBER)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
mark_reg_store (reg, setter, data);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 that REG has conflicts with all the regs currently live.
Do not mark REG itself as live. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_reg_conflicts (rtx 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 regno;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (reg) == SUBREG)
reg = SUBREG_REG (reg);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!REG_P (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
return;
regno = REGNO (reg);
/* Either this is one of the max_allocno pseudo regs not allocated,
or it is or has a hardware reg. First handle the pseudo-regs. */
if (regno >= FIRST_PSEUDO_REGISTER)
{
if (reg_allocno[regno] >= 0)
record_one_conflict (regno);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (reg_renumber[regno] >= 0)
regno = reg_renumber[regno];
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 hardware regs (and pseudos allocated to hard regs). */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (regno < FIRST_PSEUDO_REGISTER && ! fixed_regs[regno])
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int last = regno + hard_regno_nregs[regno][GET_MODE (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
while (regno < last)
{
record_one_conflict (regno);
regno++;
}
}
}
/* Mark REG as being dead (following the insn being scanned now).
Store a 0 in regs_live or allocnos_live for this register. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_reg_death (rtx 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 regno = REGNO (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
/* Either this is one of the max_allocno pseudo regs not allocated,
or it is a hardware reg. First handle the pseudo-regs. */
if (regno >= FIRST_PSEUDO_REGISTER)
{
if (reg_allocno[regno] >= 0)
CLEAR_ALLOCNO_LIVE (reg_allocno[regno]);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* For pseudo reg, see if it has been assigned a hardware reg. */
if (reg_renumber[regno] >= 0)
regno = reg_renumber[regno];
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 hardware regs (and pseudos allocated to hard regs). */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (regno < FIRST_PSEUDO_REGISTER && ! fixed_regs[regno])
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
/* Pseudo regs already assigned hardware regs are treated
almost the same as explicit hardware regs. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int last = regno + hard_regno_nregs[regno][GET_MODE (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
while (regno < last)
{
CLEAR_HARD_REG_BIT (hard_regs_live, regno);
regno++;
}
}
}
/* Mark hard reg REGNO as currently live, assuming machine mode MODE
for the value stored in it. MODE determines how many consecutive
registers are actually in use. Do not record conflicts;
it is assumed that the caller will do that. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_reg_live_nc (int regno, enum machine_mode 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
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int last = regno + hard_regno_nregs[regno][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
while (regno < last)
{
SET_HARD_REG_BIT (hard_regs_live, regno);
regno++;
}
}
/* Try to set a preference for an allocno to a hard register.
We are passed DEST and SRC which are the operands of a SET. It is known
that SRC is a register. If SRC or the first operand of SRC is a register,
try to set a preference. If one of the two is a hard register and the other
is a pseudo-register, mark the preference.
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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
Note that we are not as aggressive as local-alloc in trying to tie a
pseudo-register to a hard register. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
set_preference (rtx dest, rtx src)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
unsigned int src_regno, dest_regno;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Amount to add to the hard regno for SRC, or subtract from that for DEST,
to compensate for subregs in SRC or DEST. */
int offset = 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
unsigned 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
int copy = 1;
if (GET_RTX_FORMAT (GET_CODE (src))[0] == 'e')
src = XEXP (src, 0), copy = 0;
/* Get the reg number for both SRC and DEST.
If neither is a reg, give up. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (src))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
src_regno = REGNO (src);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
else if (GET_CODE (src) == SUBREG && REG_P (SUBREG_REG (src)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
src_regno = REGNO (SUBREG_REG (src));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (REGNO (SUBREG_REG (src)) < FIRST_PSEUDO_REGISTER)
offset += subreg_regno_offset (REGNO (SUBREG_REG (src)),
GET_MODE (SUBREG_REG (src)),
SUBREG_BYTE (src),
GET_MODE (src));
else
offset += (SUBREG_BYTE (src)
/ REGMODE_NATURAL_SIZE (GET_MODE (src)));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
return;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (dest))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
dest_regno = REGNO (dest);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
else if (GET_CODE (dest) == SUBREG && REG_P (SUBREG_REG (dest)))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
dest_regno = REGNO (SUBREG_REG (dest));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (REGNO (SUBREG_REG (dest)) < FIRST_PSEUDO_REGISTER)
offset -= subreg_regno_offset (REGNO (SUBREG_REG (dest)),
GET_MODE (SUBREG_REG (dest)),
SUBREG_BYTE (dest),
GET_MODE (dest));
else
offset -= (SUBREG_BYTE (dest)
/ REGMODE_NATURAL_SIZE (GET_MODE (dest)));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
return;
/* Convert either or both to hard reg numbers. */
if (reg_renumber[src_regno] >= 0)
src_regno = reg_renumber[src_regno];
if (reg_renumber[dest_regno] >= 0)
dest_regno = reg_renumber[dest_regno];
/* Now if one is a hard reg and the other is a global pseudo
then give the other a preference. */
if (dest_regno < FIRST_PSEUDO_REGISTER && src_regno >= FIRST_PSEUDO_REGISTER
&& reg_allocno[src_regno] >= 0)
{
dest_regno -= offset;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (dest_regno < FIRST_PSEUDO_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
{
if (copy)
SET_REGBIT (hard_reg_copy_preferences,
reg_allocno[src_regno], dest_regno);
SET_REGBIT (hard_reg_preferences,
reg_allocno[src_regno], dest_regno);
for (i = dest_regno;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
i < dest_regno + hard_regno_nregs[dest_regno][GET_MODE (dest)];
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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++)
SET_REGBIT (hard_reg_full_preferences, reg_allocno[src_regno], i);
}
}
if (src_regno < FIRST_PSEUDO_REGISTER && dest_regno >= FIRST_PSEUDO_REGISTER
&& reg_allocno[dest_regno] >= 0)
{
src_regno += offset;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (src_regno < FIRST_PSEUDO_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
{
if (copy)
SET_REGBIT (hard_reg_copy_preferences,
reg_allocno[dest_regno], src_regno);
SET_REGBIT (hard_reg_preferences,
reg_allocno[dest_regno], src_regno);
for (i = src_regno;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
i < src_regno + hard_regno_nregs[src_regno][GET_MODE (src)];
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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++)
SET_REGBIT (hard_reg_full_preferences, reg_allocno[dest_regno], i);
}
}
}
/* Indicate that hard register number FROM was eliminated and replaced with
an offset from hard register number TO. The status of hard registers live
at the start of a basic block is updated by replacing a use of FROM with
a use of TO. */
void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
mark_elimination (int from, int to)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
basic_block bb;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
FOR_EACH_BB (bb)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
regset r = bb->il.rtl->global_live_at_start;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (REGNO_REG_SET_P (r, from))
{
CLEAR_REGNO_REG_SET (r, from);
SET_REGNO_REG_SET (r, to);
}
}
}
/* Used for communication between the following functions. Holds the
current life information. */
static regset live_relevant_regs;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 in live_relevant_regs and REGS_SET that register REG became live.
This is called via note_stores. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
reg_becomes_live (rtx reg, rtx setter ATTRIBUTE_UNUSED, void *regs_set)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
int regno;
if (GET_CODE (reg) == SUBREG)
reg = SUBREG_REG (reg);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!REG_P (reg))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
return;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
regno = REGNO (reg);
if (regno < FIRST_PSEUDO_REGISTER)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int nregs = hard_regno_nregs[regno][GET_MODE (reg)];
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
while (nregs-- > 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_REGNO_REG_SET (live_relevant_regs, regno);
if (! fixed_regs[regno])
SET_REGNO_REG_SET ((regset) regs_set, regno);
regno++;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
else if (reg_renumber[regno] >= 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_REGNO_REG_SET (live_relevant_regs, regno);
SET_REGNO_REG_SET ((regset) regs_set, regno);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
/* Record in live_relevant_regs that register REGNO died. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
reg_dies (int regno, enum machine_mode mode, struct insn_chain *chain)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
if (regno < FIRST_PSEUDO_REGISTER)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int nregs = hard_regno_nregs[regno][mode];
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
while (nregs-- > 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
{
CLEAR_REGNO_REG_SET (live_relevant_regs, regno);
if (! fixed_regs[regno])
SET_REGNO_REG_SET (&chain->dead_or_set, regno);
regno++;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +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
{
CLEAR_REGNO_REG_SET (live_relevant_regs, regno);
if (reg_renumber[regno] >= 0)
SET_REGNO_REG_SET (&chain->dead_or_set, regno);
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
/* Walk the insns of the current function and build reload_insn_chain,
and record register life information. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
build_insn_chain (rtx first)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
struct insn_chain **p = &reload_insn_chain;
struct insn_chain *prev = 0;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
basic_block b = ENTRY_BLOCK_PTR->next_bb;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
live_relevant_regs = ALLOC_REG_SET (&reg_obstack);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for (; first; first = NEXT_INSN (first))
{
struct insn_chain *c;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (first == BB_HEAD (b))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned i;
bitmap_iterator bi;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
CLEAR_REG_SET (live_relevant_regs);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 4.2.0 release.
2007-05-19 01:19:51 +00:00
EXECUTE_IF_SET_IN_BITMAP (b->il.rtl->global_live_at_start, 0, i, bi)
{
if (i < FIRST_PSEUDO_REGISTER
? ! TEST_HARD_REG_BIT (eliminable_regset, i)
: reg_renumber[i] >= 0)
SET_REGNO_REG_SET (live_relevant_regs, i);
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!NOTE_P (first) && !BARRIER_P (first))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
c = new_insn_chain ();
c->prev = prev;
prev = c;
*p = c;
p = &c->next;
c->insn = first;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
c->block = b->index;
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 (INSN_P (first))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
rtx link;
/* Mark the death of everything that dies in this instruction. */
for (link = REG_NOTES (first); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == REG_DEAD
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (XEXP (link, 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
reg_dies (REGNO (XEXP (link, 0)), GET_MODE (XEXP (link, 0)),
c);
COPY_REG_SET (&c->live_throughout, live_relevant_regs);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Mark everything born in this instruction as live. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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_stores (PATTERN (first), reg_becomes_live,
&c->dead_or_set);
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
else
COPY_REG_SET (&c->live_throughout, live_relevant_regs);
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 (INSN_P (first))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
rtx link;
/* Mark anything that is set in this insn and then unused as dying. */
for (link = REG_NOTES (first); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == REG_UNUSED
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (XEXP (link, 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
reg_dies (REGNO (XEXP (link, 0)), GET_MODE (XEXP (link, 0)),
c);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (first == BB_END (b))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
b = b->next_bb;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Stop after we pass the end of the last basic block. Verify that
no real insns are after the end of the last basic block.
We may want to reorganize the loop somewhat since this test should
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
always be the right exit test. Allow an ADDR_VEC or ADDR_DIF_VEC if
the previous real insn is a JUMP_INSN. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (b == EXIT_BLOCK_PTR)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
#ifdef ENABLE_CHECKING
for (first = NEXT_INSN (first); first; first = NEXT_INSN (first))
gcc_assert (!INSN_P (first)
|| GET_CODE (PATTERN (first)) == USE
|| ((GET_CODE (PATTERN (first)) == ADDR_VEC
|| GET_CODE (PATTERN (first)) == ADDR_DIFF_VEC)
&& prev_real_insn (first) != 0
&& JUMP_P (prev_real_insn (first))));
#endif
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
break;
}
}
FREE_REG_SET (live_relevant_regs);
*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
/* Print debugging trace information if -dg switch is given,
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
showing the information on which the allocation decisions are based. */
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
dump_conflicts (FILE *file)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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;
int has_preferences;
int nregs;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
nregs = 0;
for (i = 0; i < max_allocno; 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 (reg_renumber[allocno[allocno_order[i]].reg] >= 0)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
continue;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
nregs++;
}
fprintf (file, ";; %d regs to allocate:", nregs);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 < max_allocno; i++)
{
int 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
if (reg_renumber[allocno[allocno_order[i]].reg] >= 0)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
continue;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
fprintf (file, " %d", allocno[allocno_order[i]].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
for (j = 0; j < max_regno; j++)
if (reg_allocno[j] == allocno_order[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
&& j != allocno[allocno_order[i]].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
fprintf (file, "+%d", 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
if (allocno[allocno_order[i]].size != 1)
fprintf (file, " (%d)", allocno[allocno_order[i]].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
}
fprintf (file, "\n");
for (i = 0; i < max_allocno; 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
int j;
fprintf (file, ";; %d conflicts:", allocno[i].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
for (j = 0; j < max_allocno; 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
if (CONFLICTP (j, i))
fprintf (file, " %d", allocno[j].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
for (j = 0; j < FIRST_PSEUDO_REGISTER; 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
if (TEST_HARD_REG_BIT (allocno[i].hard_reg_conflicts, 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
fprintf (file, " %d", j);
fprintf (file, "\n");
has_preferences = 0;
for (j = 0; j < FIRST_PSEUDO_REGISTER; 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
if (TEST_HARD_REG_BIT (allocno[i].hard_reg_preferences, 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
has_preferences = 1;
if (! has_preferences)
continue;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
fprintf (file, ";; %d preferences:", allocno[i].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
for (j = 0; j < FIRST_PSEUDO_REGISTER; 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
if (TEST_HARD_REG_BIT (allocno[i].hard_reg_preferences, 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
fprintf (file, " %d", j);
fprintf (file, "\n");
}
fprintf (file, "\n");
}
void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
dump_global_regs (FILE *file)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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, j;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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
fprintf (file, ";; Register dispositions:\n");
for (i = FIRST_PSEUDO_REGISTER, j = 0; i < max_regno; i++)
if (reg_renumber[i] >= 0)
{
fprintf (file, "%d in %d ", i, reg_renumber[i]);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (++j % 6 == 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
fprintf (file, "\n");
}
fprintf (file, "\n\n;; Hard regs used: ");
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (regs_ever_live[i])
fprintf (file, " %d", i);
fprintf (file, "\n\n");
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* This page contains code to make live information more accurate.
The accurate register liveness at program point P means:
o there is a path from P to usage of the register and the
register is not redefined or killed on the path.
o register at P is partially available, i.e. there is a path from
a register definition to the point P and the register is not
killed (clobbered) on the path
The standard GCC live information means only the first condition.
Without the partial availability, there will be more register
conflicts and as a consequence worse register allocation. The
typical example where the information can be different is a
register initialized in the loop at the basic block preceding the
loop in CFG. */
/* The following structure contains basic block data flow information
used to calculate partial availability of registers. */
struct bb_info
{
/* The basic block reverse post-order number. */
int rts_number;
/* Registers used uninitialized in an insn in which there is an
early clobbered register might get the same hard register. */
bitmap earlyclobber;
/* Registers correspondingly killed (clobbered) and defined but not
killed afterward in the basic block. */
bitmap killed, avloc;
/* Registers partially available and living (in other words whose
values were calculated and used) correspondingly at the start
and end of the basic block. */
bitmap live_pavin, live_pavout;
};
/* Macros for accessing data flow information of basic blocks. */
#define BB_INFO(BB) ((struct bb_info *) (BB)->aux)
#define BB_INFO_BY_INDEX(N) BB_INFO (BASIC_BLOCK(N))
static struct bitmap_obstack greg_obstack;
/* The function allocates the info structures of each basic block. It
also initialized LIVE_PAVIN and LIVE_PAVOUT as if all hard
registers were partially available. */
static void
allocate_bb_info (void)
{
int i;
basic_block bb;
struct bb_info *bb_info;
bitmap init;
alloc_aux_for_blocks (sizeof (struct bb_info));
init = BITMAP_ALLOC (NULL);
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
bitmap_set_bit (init, i);
bitmap_obstack_initialize (&greg_obstack);
FOR_EACH_BB (bb)
{
bb_info = bb->aux;
bb_info->earlyclobber = BITMAP_ALLOC (&greg_obstack);
bb_info->avloc = BITMAP_ALLOC (&greg_obstack);
bb_info->killed = BITMAP_ALLOC (&greg_obstack);
bb_info->live_pavin = BITMAP_ALLOC (&greg_obstack);
bb_info->live_pavout = BITMAP_ALLOC (&greg_obstack);
bitmap_copy (bb_info->live_pavin, init);
bitmap_copy (bb_info->live_pavout, init);
}
BITMAP_FREE (init);
}
/* The function frees the allocated info of all basic blocks. */
static void
free_bb_info (void)
{
bitmap_obstack_release (&greg_obstack);
free_aux_for_blocks ();
}
/* The function modifies local info for register REG being changed in
SETTER. DATA is used to pass the current basic block info. */
static void
mark_reg_change (rtx reg, rtx setter, void *data)
{
int regno;
basic_block bb = data;
struct bb_info *bb_info = BB_INFO (bb);
if (GET_CODE (reg) == SUBREG)
reg = SUBREG_REG (reg);
if (!REG_P (reg))
return;
regno = REGNO (reg);
bitmap_set_bit (bb_info->killed, regno);
if (GET_CODE (setter) != CLOBBER)
bitmap_set_bit (bb_info->avloc, regno);
else
bitmap_clear_bit (bb_info->avloc, regno);
}
/* Classes of registers which could be early clobbered in the current
insn. */
static VEC(int,heap) *earlyclobber_regclass;
/* This function finds and stores register classes that could be early
clobbered in INSN. If any earlyclobber classes are found, the function
returns TRUE, in all other cases it returns FALSE. */
static bool
check_earlyclobber (rtx insn)
{
int opno;
bool found = false;
extract_insn (insn);
VEC_truncate (int, earlyclobber_regclass, 0);
for (opno = 0; opno < recog_data.n_operands; opno++)
{
char c;
bool amp_p;
int i;
enum reg_class class;
const char *p = recog_data.constraints[opno];
class = NO_REGS;
amp_p = false;
for (;;)
{
c = *p;
switch (c)
{
case '=': case '+': case '?':
case '#': case '!':
case '*': case '%':
case 'm': case '<': case '>': case 'V': case 'o':
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 'X':
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
/* These don't say anything we care about. */
break;
case '&':
amp_p = true;
break;
case '\0':
case ',':
if (amp_p && class != NO_REGS)
{
int rc;
found = true;
for (i = 0;
VEC_iterate (int, earlyclobber_regclass, i, rc);
i++)
{
if (rc == (int) class)
goto found_rc;
}
/* We use VEC_quick_push here because
earlyclobber_regclass holds no more than
N_REG_CLASSES elements. */
VEC_quick_push (int, earlyclobber_regclass, (int) class);
found_rc:
;
}
amp_p = false;
class = NO_REGS;
break;
case 'r':
class = GENERAL_REGS;
break;
default:
class = REG_CLASS_FROM_CONSTRAINT (c, p);
break;
}
if (c == '\0')
break;
p += CONSTRAINT_LEN (c, p);
}
}
return found;
}
/* The function checks that pseudo-register *X has a class
intersecting with the class of pseudo-register could be early
clobbered in the same insn.
This function is a no-op if earlyclobber_regclass is empty. */
static int
mark_reg_use_for_earlyclobber (rtx *x, void *data ATTRIBUTE_UNUSED)
{
enum reg_class pref_class, alt_class;
int i, regno;
basic_block bb = data;
struct bb_info *bb_info = BB_INFO (bb);
if (REG_P (*x) && REGNO (*x) >= FIRST_PSEUDO_REGISTER)
{
int rc;
regno = REGNO (*x);
if (bitmap_bit_p (bb_info->killed, regno)
|| bitmap_bit_p (bb_info->avloc, regno))
return 0;
pref_class = reg_preferred_class (regno);
alt_class = reg_alternate_class (regno);
for (i = 0; VEC_iterate (int, earlyclobber_regclass, i, rc); i++)
{
if (reg_classes_intersect_p (rc, pref_class)
|| (rc != NO_REGS
&& reg_classes_intersect_p (rc, alt_class)))
{
bitmap_set_bit (bb_info->earlyclobber, regno);
break;
}
}
}
return 0;
}
/* The function processes all pseudo-registers in *X with the aid of
previous function. */
static void
mark_reg_use_for_earlyclobber_1 (rtx *x, void *data)
{
for_each_rtx (x, mark_reg_use_for_earlyclobber, data);
}
/* The function calculates local info for each basic block. */
static void
calculate_local_reg_bb_info (void)
{
basic_block bb;
rtx insn, bound;
/* We know that earlyclobber_regclass holds no more than
N_REG_CLASSES elements. See check_earlyclobber. */
earlyclobber_regclass = VEC_alloc (int, heap, N_REG_CLASSES);
FOR_EACH_BB (bb)
{
bound = NEXT_INSN (BB_END (bb));
for (insn = BB_HEAD (bb); insn != bound; insn = NEXT_INSN (insn))
if (INSN_P (insn))
{
note_stores (PATTERN (insn), mark_reg_change, bb);
if (check_earlyclobber (insn))
note_uses (&PATTERN (insn), mark_reg_use_for_earlyclobber_1, bb);
}
}
VEC_free (int, heap, earlyclobber_regclass);
}
/* The function sets up reverse post-order number of each basic
block. */
static void
set_up_bb_rts_numbers (void)
{
int i;
int *rts_order;
rts_order = XNEWVEC (int, n_basic_blocks - NUM_FIXED_BLOCKS);
post_order_compute (rts_order, false);
for (i = 0; i < n_basic_blocks - NUM_FIXED_BLOCKS; i++)
BB_INFO_BY_INDEX (rts_order [i])->rts_number = i;
free (rts_order);
}
/* Compare function for sorting blocks in reverse postorder. */
static int
rpost_cmp (const void *bb1, const void *bb2)
{
basic_block b1 = *(basic_block *) bb1, b2 = *(basic_block *) bb2;
return BB_INFO (b2)->rts_number - BB_INFO (b1)->rts_number;
}
/* Temporary bitmap used for live_pavin, live_pavout calculation. */
static bitmap temp_bitmap;
/* The function calculates partial register availability according to
the following equations:
bb.live_pavin
= empty for entry block
| union (live_pavout of predecessors) & global_live_at_start
bb.live_pavout = union (bb.live_pavin - bb.killed, bb.avloc)
& global_live_at_end */
static void
calculate_reg_pav (void)
{
basic_block bb, succ;
edge e;
int i, nel;
VEC(basic_block,heap) *bbs, *new_bbs, *temp;
basic_block *bb_array;
sbitmap wset;
bbs = VEC_alloc (basic_block, heap, n_basic_blocks);
new_bbs = VEC_alloc (basic_block, heap, n_basic_blocks);
temp_bitmap = BITMAP_ALLOC (NULL);
FOR_EACH_BB (bb)
{
VEC_quick_push (basic_block, bbs, bb);
}
wset = sbitmap_alloc (n_basic_blocks + 1);
while (VEC_length (basic_block, bbs))
{
bb_array = VEC_address (basic_block, bbs);
nel = VEC_length (basic_block, bbs);
qsort (bb_array, nel, sizeof (basic_block), rpost_cmp);
sbitmap_zero (wset);
for (i = 0; i < nel; i++)
{
edge_iterator ei;
struct bb_info *bb_info;
bitmap bb_live_pavin, bb_live_pavout;
bb = bb_array [i];
bb_info = BB_INFO (bb);
bb_live_pavin = bb_info->live_pavin;
bb_live_pavout = bb_info->live_pavout;
FOR_EACH_EDGE (e, ei, bb->preds)
{
basic_block pred = e->src;
if (pred->index != ENTRY_BLOCK)
bitmap_ior_into (bb_live_pavin, BB_INFO (pred)->live_pavout);
}
bitmap_and_into (bb_live_pavin, bb->il.rtl->global_live_at_start);
bitmap_ior_and_compl (temp_bitmap, bb_info->avloc,
bb_live_pavin, bb_info->killed);
bitmap_and_into (temp_bitmap, bb->il.rtl->global_live_at_end);
if (! bitmap_equal_p (temp_bitmap, bb_live_pavout))
{
bitmap_copy (bb_live_pavout, temp_bitmap);
FOR_EACH_EDGE (e, ei, bb->succs)
{
succ = e->dest;
if (succ->index != EXIT_BLOCK
&& !TEST_BIT (wset, succ->index))
{
SET_BIT (wset, succ->index);
VEC_quick_push (basic_block, new_bbs, succ);
}
}
}
}
temp = bbs;
bbs = new_bbs;
new_bbs = temp;
VEC_truncate (basic_block, new_bbs, 0);
}
sbitmap_free (wset);
BITMAP_FREE (temp_bitmap);
VEC_free (basic_block, heap, new_bbs);
VEC_free (basic_block, heap, bbs);
}
/* The function modifies partial availability information for two
special cases to prevent incorrect work of the subsequent passes
with the accurate live information based on the partial
availability. */
static void
modify_reg_pav (void)
{
basic_block bb;
struct bb_info *bb_info;
#ifdef STACK_REGS
int i;
HARD_REG_SET zero, stack_hard_regs, used;
bitmap stack_regs;
CLEAR_HARD_REG_SET (zero);
CLEAR_HARD_REG_SET (stack_hard_regs);
for (i = FIRST_STACK_REG; i <= LAST_STACK_REG; i++)
SET_HARD_REG_BIT(stack_hard_regs, i);
stack_regs = BITMAP_ALLOC (&greg_obstack);
for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++)
{
COPY_HARD_REG_SET (used, reg_class_contents[reg_preferred_class (i)]);
IOR_HARD_REG_SET (used, reg_class_contents[reg_alternate_class (i)]);
AND_HARD_REG_SET (used, stack_hard_regs);
GO_IF_HARD_REG_EQUAL(used, zero, skip);
bitmap_set_bit (stack_regs, i);
skip:
;
}
#endif
FOR_EACH_BB (bb)
{
bb_info = BB_INFO (bb);
/* Reload can assign the same hard register to uninitialized
pseudo-register and early clobbered pseudo-register in an
insn if the pseudo-register is used first time in given BB
and not lived at the BB start. To prevent this we don't
change life information for such pseudo-registers. */
bitmap_ior_into (bb_info->live_pavin, bb_info->earlyclobber);
#ifdef STACK_REGS
/* We can not use the same stack register for uninitialized
pseudo-register and another living pseudo-register because if the
uninitialized pseudo-register dies, subsequent pass reg-stack
will be confused (it will believe that the other register
dies). */
bitmap_ior_into (bb_info->live_pavin, stack_regs);
#endif
}
#ifdef STACK_REGS
BITMAP_FREE (stack_regs);
#endif
}
/* The following function makes live information more accurate by
modifying global_live_at_start and global_live_at_end of basic
blocks.
The standard GCC life analysis permits registers to live
uninitialized, for example:
R is never used
.....
Loop:
R is defined
...
R is used.
With normal life_analysis, R would be live before "Loop:".
The result is that R causes many interferences that do not
serve any purpose.
After the function call a register lives at a program point
only if it is initialized on a path from CFG entry to the
program point. */
static void
make_accurate_live_analysis (void)
{
basic_block bb;
struct bb_info *bb_info;
max_regno = max_reg_num ();
compact_blocks ();
allocate_bb_info ();
calculate_local_reg_bb_info ();
set_up_bb_rts_numbers ();
calculate_reg_pav ();
modify_reg_pav ();
FOR_EACH_BB (bb)
{
bb_info = BB_INFO (bb);
bitmap_and_into (bb->il.rtl->global_live_at_start, bb_info->live_pavin);
bitmap_and_into (bb->il.rtl->global_live_at_end, bb_info->live_pavout);
}
free_bb_info ();
}
/* Run old register allocator. Return TRUE if we must exit
rest_of_compilation upon return. */
static unsigned int
rest_of_handle_global_alloc (void)
{
bool failure;
/* If optimizing, allocate remaining pseudo-regs. Do the reload
pass fixing up any insns that are invalid. */
if (optimize)
failure = global_alloc ();
else
{
build_insn_chain (get_insns ());
failure = reload (get_insns (), 0);
}
if (dump_enabled_p (pass_global_alloc.static_pass_number))
{
timevar_push (TV_DUMP);
dump_global_regs (dump_file);
timevar_pop (TV_DUMP);
}
gcc_assert (reload_completed || failure);
reload_completed = !failure;
return 0;
}
struct tree_opt_pass pass_global_alloc =
{
"greg", /* name */
NULL, /* gate */
rest_of_handle_global_alloc, /* execute */
NULL, /* sub */
NULL, /* next */
0, /* static_pass_number */
TV_GLOBAL_ALLOC, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
TODO_dump_func |
TODO_ggc_collect, /* todo_flags_finish */
'g' /* letter */
};
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