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freebsd-dev/contrib/gcc/rtlanal.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
/* Analyze RTL for C-Compiler
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001, 2002 Free Software Foundation, Inc.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
This file is part of GCC.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
You should have received a copy of the GNU General Public License
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "config.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "system.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 "toplev.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 "hard-reg-set.h"
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
#include "insn-config.h"
#include "recog.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"
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
#include "flags.h"
#include "basic-block.h"
#include "real.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Forward declarations */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
static int global_reg_mentioned_p_1 PARAMS ((rtx *, 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
static void set_of_1 PARAMS ((rtx, rtx, void *));
static void insn_dependent_p_1 PARAMS ((rtx, rtx, void *));
static int computed_jump_p_1 PARAMS ((rtx));
static void parms_set PARAMS ((rtx, rtx, void *));
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
static bool hoist_test_store PARAMS ((rtx, rtx, regset));
static void hoist_update_store PARAMS ((rtx, rtx *, rtx, rtx));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Bit flags that specify the machine subtype we are compiling for.
Bits are tested using macros TARGET_... defined in the tm.h file
and set by `-m...' switches. Must be defined in rtlanal.c. */
int target_flags;
/* Return 1 if the value of X is unstable
(would be different at a different point in the program).
The frame pointer, arg pointer, etc. are considered stable
(within one function) and so is anything marked `unchanging'. */
int
rtx_unstable_p (x)
rtx x;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
RTX_CODE code = GET_CODE (x);
int i;
const char *fmt;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
switch (code)
{
case MEM:
return ! RTX_UNCHANGING_P (x) || rtx_unstable_p (XEXP (x, 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
case QUEUED:
return 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case ADDRESSOF:
case CONST:
case CONST_INT:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case SYMBOL_REF:
case LABEL_REF:
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case REG:
/* As in rtx_varies_p, we have to use the actual rtx, not reg number. */
if (x == frame_pointer_rtx || x == hard_frame_pointer_rtx
/* The arg pointer varies if it is not a fixed register. */
|| (x == arg_pointer_rtx && fixed_regs[ARG_POINTER_REGNUM])
|| RTX_UNCHANGING_P (x))
return 0;
#ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
/* ??? When call-clobbered, the value is stable modulo the restore
that must happen after a call. This currently screws up local-alloc
into believing that the restore is not needed. */
if (x == pic_offset_table_rtx)
return 0;
#endif
return 1;
case ASM_OPERANDS:
if (MEM_VOLATILE_P (x))
return 1;
/* FALLTHROUGH */
default:
break;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
if (fmt[i] == 'e')
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (rtx_unstable_p (XEXP (x, i)))
return 1;
}
else if (fmt[i] == 'E')
{
int j;
for (j = 0; j < XVECLEN (x, i); j++)
if (rtx_unstable_p (XVECEXP (x, i, j)))
return 1;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 0;
}
/* Return 1 if X has a value that can vary even between two
executions of the program. 0 means X can be compared reliably
against certain constants or near-constants.
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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_ALIAS is nonzero if we are called from alias analysis; if it is
zero, we are slightly more conservative.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
The frame pointer and the arg pointer are considered constant. */
int
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx_varies_p (x, for_alias)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx x;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int for_alias;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
RTX_CODE code = GET_CODE (x);
int i;
const char *fmt;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
switch (code)
{
case MEM:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return ! RTX_UNCHANGING_P (x) || rtx_varies_p (XEXP (x, 0), for_alias);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case QUEUED:
return 1;
case CONST:
case CONST_INT:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case SYMBOL_REF:
case LABEL_REF:
return 0;
case REG:
/* Note that we have to test for the actual rtx used for the frame
and arg pointers and not just the register number in case we have
eliminated the frame and/or arg pointer and are using it
for pseudos. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (x == frame_pointer_rtx || x == hard_frame_pointer_rtx
/* The arg pointer varies if it is not a fixed register. */
|| (x == arg_pointer_rtx && fixed_regs[ARG_POINTER_REGNUM]))
return 0;
if (x == pic_offset_table_rtx
#ifdef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
/* ??? When call-clobbered, the value is stable modulo the restore
that must happen after a call. This currently screws up
local-alloc into believing that the restore is not needed, so we
must return 0 only if we are called from alias analysis. */
&& for_alias
#endif
)
return 0;
return 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case LO_SUM:
/* The operand 0 of a LO_SUM is considered constant
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
(in fact it is related specifically to operand 1)
during alias analysis. */
return (! for_alias && rtx_varies_p (XEXP (x, 0), for_alias))
|| rtx_varies_p (XEXP (x, 1), for_alias);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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
case ASM_OPERANDS:
if (MEM_VOLATILE_P (x))
return 1;
/* FALLTHROUGH */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
if (fmt[i] == 'e')
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (rtx_varies_p (XEXP (x, i), for_alias))
return 1;
}
else if (fmt[i] == 'E')
{
int j;
for (j = 0; j < XVECLEN (x, i); j++)
if (rtx_varies_p (XVECEXP (x, i, j), for_alias))
return 1;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 0;
}
/* Return 0 if the use of X as an address in a MEM can cause a trap. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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_addr_can_trap_p (x)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx x;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
enum rtx_code code = GET_CODE (x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
switch (code)
{
case SYMBOL_REF:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return SYMBOL_REF_WEAK (x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case LABEL_REF:
return 0;
case REG:
/* As in rtx_varies_p, we have to use the actual rtx, not reg number. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (x == frame_pointer_rtx || x == hard_frame_pointer_rtx
|| x == stack_pointer_rtx
/* The arg pointer varies if it is not a fixed register. */
|| (x == arg_pointer_rtx && fixed_regs[ARG_POINTER_REGNUM]))
return 0;
/* All of the virtual frame registers are stack references. */
if (REGNO (x) >= FIRST_VIRTUAL_REGISTER
&& REGNO (x) <= LAST_VIRTUAL_REGISTER)
return 0;
return 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CONST:
return rtx_addr_can_trap_p (XEXP (x, 0));
case PLUS:
/* An address is assumed not to trap if it is an address that can't
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
trap plus a constant integer or it is the pic register plus a
constant. */
return ! ((! rtx_addr_can_trap_p (XEXP (x, 0))
&& GET_CODE (XEXP (x, 1)) == CONST_INT)
|| (XEXP (x, 0) == pic_offset_table_rtx
&& CONSTANT_P (XEXP (x, 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
case LO_SUM:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case PRE_MODIFY:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 rtx_addr_can_trap_p (XEXP (x, 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
case PRE_DEC:
case PRE_INC:
case POST_DEC:
case POST_INC:
case POST_MODIFY:
return rtx_addr_can_trap_p (XEXP (x, 0));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* If it isn't one of the case above, it can cause a trap. */
return 1;
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* Return 1 if X refers to a memory location whose address
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
cannot be compared reliably with constant addresses,
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
or if X refers to a BLKmode memory object.
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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_ALIAS is nonzero if we are called from alias analysis; if it is
zero, we are slightly more conservative. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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_addr_varies_p (x, for_alias)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
rtx x;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int for_alias;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
enum rtx_code code;
int i;
const char *fmt;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (x == 0)
return 0;
code = GET_CODE (x);
if (code == MEM)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return GET_MODE (x) == BLKmode || rtx_varies_p (XEXP (x, 0), for_alias);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
if (fmt[i] == 'e')
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (rtx_addr_varies_p (XEXP (x, i), for_alias))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 1;
}
else if (fmt[i] == 'E')
{
int j;
for (j = 0; j < XVECLEN (x, 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
if (rtx_addr_varies_p (XVECEXP (x, i, j), for_alias))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 1;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 0;
}
/* Return the value of the integer term in X, if one is apparent;
otherwise return 0.
Only obvious integer terms are detected.
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 is used in cse.c with the `related_value' field. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
HOST_WIDE_INT
get_integer_term (x)
rtx x;
{
if (GET_CODE (x) == CONST)
x = XEXP (x, 0);
if (GET_CODE (x) == MINUS
&& GET_CODE (XEXP (x, 1)) == CONST_INT)
return - INTVAL (XEXP (x, 1));
if (GET_CODE (x) == PLUS
&& GET_CODE (XEXP (x, 1)) == CONST_INT)
return INTVAL (XEXP (x, 1));
return 0;
}
/* If X is a constant, return the value sans apparent integer term;
otherwise return 0.
Only obvious integer terms are detected. */
rtx
get_related_value (x)
rtx x;
{
if (GET_CODE (x) != CONST)
return 0;
x = XEXP (x, 0);
if (GET_CODE (x) == PLUS
&& GET_CODE (XEXP (x, 1)) == CONST_INT)
return XEXP (x, 0);
else if (GET_CODE (x) == MINUS
&& GET_CODE (XEXP (x, 1)) == CONST_INT)
return XEXP (x, 0);
return 0;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Given a tablejump insn INSN, return the RTL expression for the offset
into the jump table. If the offset cannot be determined, then return
NULL_RTX.
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
If EARLIEST is nonzero, it is a pointer to a place where the earliest
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
insn used in locating the offset was found. */
rtx
get_jump_table_offset (insn, earliest)
rtx insn;
rtx *earliest;
{
rtx label;
rtx table;
rtx set;
rtx old_insn;
rtx x;
rtx old_x;
rtx y;
rtx old_y;
int i;
if (GET_CODE (insn) != JUMP_INSN
|| ! (label = JUMP_LABEL (insn))
|| ! (table = NEXT_INSN (label))
|| GET_CODE (table) != JUMP_INSN
|| (GET_CODE (PATTERN (table)) != ADDR_VEC
&& GET_CODE (PATTERN (table)) != ADDR_DIFF_VEC)
|| ! (set = single_set (insn)))
return NULL_RTX;
x = SET_SRC (set);
/* Some targets (eg, ARM) emit a tablejump that also
contains the out-of-range target. */
if (GET_CODE (x) == IF_THEN_ELSE
&& GET_CODE (XEXP (x, 2)) == LABEL_REF)
x = XEXP (x, 1);
/* Search backwards and locate the expression stored in X. */
for (old_x = NULL_RTX; GET_CODE (x) == REG && x != old_x;
old_x = x, x = find_last_value (x, &insn, NULL_RTX, 0))
;
/* If X is an expression using a relative address then strip
off the addition / subtraction of PC, PIC_OFFSET_TABLE_REGNUM,
or the jump table label. */
if (GET_CODE (PATTERN (table)) == ADDR_DIFF_VEC
&& (GET_CODE (x) == PLUS || GET_CODE (x) == MINUS))
{
for (i = 0; i < 2; i++)
{
old_insn = insn;
y = XEXP (x, i);
if (y == pc_rtx || y == pic_offset_table_rtx)
break;
for (old_y = NULL_RTX; GET_CODE (y) == REG && y != old_y;
old_y = y, y = find_last_value (y, &old_insn, NULL_RTX, 0))
;
if ((GET_CODE (y) == LABEL_REF && XEXP (y, 0) == label))
break;
}
if (i >= 2)
return NULL_RTX;
x = XEXP (x, 1 - i);
for (old_x = NULL_RTX; GET_CODE (x) == REG && x != old_x;
old_x = x, x = find_last_value (x, &insn, NULL_RTX, 0))
;
}
/* Strip off any sign or zero extension. */
if (GET_CODE (x) == SIGN_EXTEND || GET_CODE (x) == ZERO_EXTEND)
{
x = XEXP (x, 0);
for (old_x = NULL_RTX; GET_CODE (x) == REG && x != old_x;
old_x = x, x = find_last_value (x, &insn, NULL_RTX, 0))
;
}
/* If X isn't a MEM then this isn't a tablejump we understand. */
if (GET_CODE (x) != MEM)
return NULL_RTX;
/* Strip off the MEM. */
x = XEXP (x, 0);
for (old_x = NULL_RTX; GET_CODE (x) == REG && x != old_x;
old_x = x, x = find_last_value (x, &insn, NULL_RTX, 0))
;
/* If X isn't a PLUS than this isn't a tablejump we understand. */
if (GET_CODE (x) != PLUS)
return NULL_RTX;
/* At this point we should have an expression representing the jump table
plus an offset. Examine each operand in order to determine which one
represents the jump table. Knowing that tells us that the other operand
must represent the offset. */
for (i = 0; i < 2; i++)
{
old_insn = insn;
y = XEXP (x, i);
for (old_y = NULL_RTX; GET_CODE (y) == REG && y != old_y;
old_y = y, y = find_last_value (y, &old_insn, NULL_RTX, 0))
;
if ((GET_CODE (y) == CONST || GET_CODE (y) == LABEL_REF)
&& reg_mentioned_p (label, y))
break;
}
if (i >= 2)
return NULL_RTX;
x = XEXP (x, 1 - i);
/* Strip off the addition / subtraction of PIC_OFFSET_TABLE_REGNUM. */
if (GET_CODE (x) == PLUS || GET_CODE (x) == MINUS)
for (i = 0; i < 2; i++)
if (XEXP (x, i) == pic_offset_table_rtx)
{
x = XEXP (x, 1 - i);
break;
}
if (earliest)
*earliest = insn;
/* Return the RTL expression representing the offset. */
return x;
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* A subroutine of global_reg_mentioned_p, returns 1 if *LOC mentions
a global register. */
static int
global_reg_mentioned_p_1 (loc, data)
rtx *loc;
void *data ATTRIBUTE_UNUSED;
{
int regno;
rtx x = *loc;
if (! x)
return 0;
switch (GET_CODE (x))
{
case SUBREG:
if (GET_CODE (SUBREG_REG (x)) == REG)
{
if (REGNO (SUBREG_REG (x)) < FIRST_PSEUDO_REGISTER
&& global_regs[subreg_regno (x)])
return 1;
return 0;
}
break;
case REG:
regno = REGNO (x);
if (regno < FIRST_PSEUDO_REGISTER && global_regs[regno])
return 1;
return 0;
case SCRATCH:
case PC:
case CC0:
case CONST_INT:
case CONST_DOUBLE:
case CONST:
case LABEL_REF:
return 0;
case CALL:
/* A non-constant call might use a global register. */
return 1;
default:
break;
}
return 0;
}
/* Returns nonzero if X mentions a global register. */
int
global_reg_mentioned_p (x)
rtx x;
{
if (INSN_P (x))
{
if (GET_CODE (x) == CALL_INSN)
{
if (! CONST_OR_PURE_CALL_P (x))
return 1;
x = CALL_INSN_FUNCTION_USAGE (x);
if (x == 0)
return 0;
}
else
x = PATTERN (x);
}
return for_each_rtx (&x, global_reg_mentioned_p_1, NULL);
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Return the number of places FIND appears within X. If COUNT_DEST is
zero, we do not count occurrences inside the destination of a SET. */
int
count_occurrences (x, find, count_dest)
rtx x, find;
int count_dest;
{
int i, j;
enum rtx_code code;
const char *format_ptr;
int count;
if (x == find)
return 1;
code = GET_CODE (x);
switch (code)
{
case REG:
case CONST_INT:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case SYMBOL_REF:
case CODE_LABEL:
case PC:
case CC0:
return 0;
case MEM:
if (GET_CODE (find) == MEM && rtx_equal_p (x, find))
return 1;
break;
case SET:
if (SET_DEST (x) == find && ! count_dest)
return count_occurrences (SET_SRC (x), find, count_dest);
break;
default:
break;
}
format_ptr = GET_RTX_FORMAT (code);
count = 0;
for (i = 0; i < GET_RTX_LENGTH (code); i++)
{
switch (*format_ptr++)
{
case 'e':
count += count_occurrences (XEXP (x, i), find, count_dest);
break;
case 'E':
for (j = 0; j < XVECLEN (x, i); j++)
count += count_occurrences (XVECEXP (x, i, j), find, count_dest);
break;
}
}
return count;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Nonzero if register REG appears somewhere within IN.
Also works if REG is not a register; in this case it checks
for a subexpression of IN that is Lisp "equal" to REG. */
int
reg_mentioned_p (reg, in)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx reg, in;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
const char *fmt;
int i;
enum rtx_code code;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (in == 0)
return 0;
if (reg == in)
return 1;
if (GET_CODE (in) == LABEL_REF)
return reg == XEXP (in, 0);
code = GET_CODE (in);
switch (code)
{
/* Compare registers by number. */
case REG:
return GET_CODE (reg) == REG && REGNO (in) == REGNO (reg);
/* These codes have no constituent expressions
and are unique. */
case SCRATCH:
case CC0:
case PC:
return 0;
case CONST_INT:
return GET_CODE (reg) == CONST_INT && INTVAL (in) == INTVAL (reg);
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CONST_DOUBLE:
/* These are kept unique for a given value. */
return 0;
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
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
if (GET_CODE (reg) == code && rtx_equal_p (reg, in))
return 1;
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'E')
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int j;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (j = XVECLEN (in, i) - 1; j >= 0; j--)
if (reg_mentioned_p (reg, XVECEXP (in, i, j)))
return 1;
}
else if (fmt[i] == 'e'
&& reg_mentioned_p (reg, XEXP (in, i)))
return 1;
}
return 0;
}
/* Return 1 if in between BEG and END, exclusive of BEG and END, there is
no CODE_LABEL insn. */
int
no_labels_between_p (beg, end)
rtx beg, end;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 p;
if (beg == end)
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (p = NEXT_INSN (beg); p != end; p = NEXT_INSN (p))
if (GET_CODE (p) == CODE_LABEL)
return 0;
return 1;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Return 1 if in between BEG and END, exclusive of BEG and END, there is
no JUMP_INSN insn. */
int
no_jumps_between_p (beg, end)
rtx beg, end;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 p;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
for (p = NEXT_INSN (beg); p != end; p = NEXT_INSN (p))
if (GET_CODE (p) == JUMP_INSN)
return 0;
return 1;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Nonzero if register REG is used in an insn between
FROM_INSN and TO_INSN (exclusive of those two). */
int
reg_used_between_p (reg, from_insn, to_insn)
rtx reg, from_insn, to_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
rtx insn;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (from_insn == to_insn)
return 0;
for (insn = NEXT_INSN (from_insn); insn != to_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
&& (reg_overlap_mentioned_p (reg, PATTERN (insn))
|| (GET_CODE (insn) == CALL_INSN
&& (find_reg_fusage (insn, USE, reg)
|| find_reg_fusage (insn, CLOBBER, reg)))))
return 1;
return 0;
}
/* Nonzero if the old value of X, a register, is referenced in BODY. If X
is entirely replaced by a new value and the only use is as a SET_DEST,
we do not consider it a reference. */
int
reg_referenced_p (x, body)
rtx x;
rtx body;
{
int i;
switch (GET_CODE (body))
{
case SET:
if (reg_overlap_mentioned_p (x, SET_SRC (body)))
return 1;
/* If the destination is anything other than CC0, PC, a REG or a SUBREG
of a REG that occupies all of the REG, the insn references X if
it is mentioned in the destination. */
if (GET_CODE (SET_DEST (body)) != CC0
&& GET_CODE (SET_DEST (body)) != PC
&& GET_CODE (SET_DEST (body)) != REG
&& ! (GET_CODE (SET_DEST (body)) == SUBREG
&& GET_CODE (SUBREG_REG (SET_DEST (body))) == REG
&& (((GET_MODE_SIZE (GET_MODE (SUBREG_REG (SET_DEST (body))))
+ (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
== ((GET_MODE_SIZE (GET_MODE (SET_DEST (body)))
+ (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)))
&& reg_overlap_mentioned_p (x, SET_DEST (body)))
return 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case ASM_OPERANDS:
for (i = ASM_OPERANDS_INPUT_LENGTH (body) - 1; i >= 0; i--)
if (reg_overlap_mentioned_p (x, ASM_OPERANDS_INPUT (body, i)))
return 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CALL:
case USE:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case IF_THEN_ELSE:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return reg_overlap_mentioned_p (x, body);
case TRAP_IF:
return reg_overlap_mentioned_p (x, TRAP_CONDITION (body));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case PREFETCH:
return reg_overlap_mentioned_p (x, XEXP (body, 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
case UNSPEC:
case UNSPEC_VOLATILE:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 = XVECLEN (body, 0) - 1; i >= 0; i--)
if (reg_overlap_mentioned_p (x, XVECEXP (body, 0, i)))
return 1;
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case PARALLEL:
for (i = XVECLEN (body, 0) - 1; i >= 0; i--)
if (reg_referenced_p (x, XVECEXP (body, 0, i)))
return 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 0;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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
case CLOBBER:
if (GET_CODE (XEXP (body, 0)) == MEM)
if (reg_overlap_mentioned_p (x, XEXP (XEXP (body, 0), 0)))
return 1;
return 0;
case COND_EXEC:
if (reg_overlap_mentioned_p (x, COND_EXEC_TEST (body)))
return 1;
return reg_referenced_p (x, COND_EXEC_CODE (body));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
default:
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
/* Nonzero if register REG is referenced in an insn between
FROM_INSN and TO_INSN (exclusive of those two). Sets of REG do
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
not count. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
int
reg_referenced_between_p (reg, from_insn, to_insn)
rtx reg, from_insn, to_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
rtx insn;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (from_insn == to_insn)
return 0;
for (insn = NEXT_INSN (from_insn); insn != to_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
&& (reg_referenced_p (reg, PATTERN (insn))
|| (GET_CODE (insn) == CALL_INSN
&& find_reg_fusage (insn, USE, reg))))
return 1;
return 0;
}
/* Nonzero if register REG is set or clobbered in an insn between
FROM_INSN and TO_INSN (exclusive of those two). */
int
reg_set_between_p (reg, from_insn, to_insn)
rtx reg, from_insn, to_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
rtx insn;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (from_insn == to_insn)
return 0;
for (insn = NEXT_INSN (from_insn); insn != to_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) && reg_set_p (reg, 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
return 1;
return 0;
}
/* Internals of reg_set_between_p. */
int
reg_set_p (reg, insn)
rtx reg, insn;
{
rtx body = insn;
/* We can be passed an insn or part of one. If we are passed an insn,
check if a side-effect of the insn clobbers 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
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
{
if (FIND_REG_INC_NOTE (insn, reg)
|| (GET_CODE (insn) == CALL_INSN
/* We'd like to test call_used_regs here, but rtlanal.c can't
reference that variable due to its use in genattrtab. So
we'll just be more conservative.
??? Unless we could ensure that the CALL_INSN_FUNCTION_USAGE
information holds all clobbered registers. */
&& ((GET_CODE (reg) == REG
&& REGNO (reg) < FIRST_PSEUDO_REGISTER)
|| GET_CODE (reg) == MEM
|| find_reg_fusage (insn, CLOBBER, reg))))
return 1;
body = PATTERN (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
return set_of (reg, insn) != NULL_RTX;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Similar to reg_set_between_p, but check all registers in X. Return 0
only if none of them are modified between START and END. Do not
consider non-registers one way or the other. */
int
regs_set_between_p (x, start, end)
rtx x;
rtx start, end;
{
enum rtx_code code = GET_CODE (x);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *fmt;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
int i, j;
switch (code)
{
case CONST_INT:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
case CONST:
case SYMBOL_REF:
case LABEL_REF:
case PC:
case CC0:
return 0;
case REG:
return reg_set_between_p (x, start, end);
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
default:
break;
}
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e' && regs_set_between_p (XEXP (x, i), start, end))
return 1;
else if (fmt[i] == 'E')
for (j = XVECLEN (x, i) - 1; j >= 0; j--)
if (regs_set_between_p (XVECEXP (x, i, j), start, end))
return 1;
}
return 0;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Similar to reg_set_between_p, but check all registers in X. Return 0
only if none of them are modified between START and END. Return 1 if
X contains a MEM; this routine does not perform any memory aliasing. */
int
modified_between_p (x, start, end)
rtx x;
rtx start, end;
{
enum rtx_code code = GET_CODE (x);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *fmt;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 i, j;
switch (code)
{
case CONST_INT:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CONST:
case SYMBOL_REF:
case LABEL_REF:
return 0;
case PC:
case CC0:
return 1;
case MEM:
/* If the memory is not constant, assume it is modified. If it is
constant, we still have to check the address. */
if (! RTX_UNCHANGING_P (x))
return 1;
break;
case REG:
return reg_set_between_p (x, start, end);
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
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e' && modified_between_p (XEXP (x, i), start, end))
return 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (fmt[i] == 'E')
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 = XVECLEN (x, i) - 1; j >= 0; j--)
if (modified_between_p (XVECEXP (x, i, j), start, end))
return 1;
}
return 0;
}
/* Similar to reg_set_p, but check all registers in X. Return 0 only if none
of them are modified in INSN. Return 1 if X contains a MEM; this routine
does not perform any memory aliasing. */
int
modified_in_p (x, insn)
rtx x;
rtx insn;
{
enum rtx_code code = GET_CODE (x);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *fmt;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 i, j;
switch (code)
{
case CONST_INT:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CONST:
case SYMBOL_REF:
case LABEL_REF:
return 0;
case PC:
case CC0:
return 1;
case MEM:
/* If the memory is not constant, assume it is modified. If it is
constant, we still have to check the address. */
if (! RTX_UNCHANGING_P (x))
return 1;
break;
case REG:
return reg_set_p (x, insn);
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e' && modified_in_p (XEXP (x, i), insn))
return 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (fmt[i] == 'E')
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 = XVECLEN (x, i) - 1; j >= 0; j--)
if (modified_in_p (XVECEXP (x, i, j), insn))
return 1;
}
return 0;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Return true if anything in insn X is (anti,output,true) dependent on
anything in insn Y. */
int
insn_dependent_p (x, y)
rtx x, y;
{
rtx tmp;
if (! INSN_P (x) || ! INSN_P (y))
abort ();
tmp = PATTERN (y);
note_stores (PATTERN (x), insn_dependent_p_1, &tmp);
if (tmp == NULL_RTX)
return 1;
tmp = PATTERN (x);
note_stores (PATTERN (y), insn_dependent_p_1, &tmp);
if (tmp == NULL_RTX)
return 1;
return 0;
}
/* A helper routine for insn_dependent_p called through note_stores. */
static void
insn_dependent_p_1 (x, pat, data)
rtx x;
rtx pat ATTRIBUTE_UNUSED;
void *data;
{
rtx * pinsn = (rtx *) data;
if (*pinsn && reg_mentioned_p (x, *pinsn))
*pinsn = NULL_RTX;
}
/* Helper function for set_of. */
struct set_of_data
{
rtx found;
rtx pat;
};
static void
set_of_1 (x, pat, data1)
rtx x;
rtx pat;
void *data1;
{
struct set_of_data *data = (struct set_of_data *) (data1);
if (rtx_equal_p (x, data->pat)
|| (GET_CODE (x) != MEM && reg_overlap_mentioned_p (data->pat, x)))
data->found = pat;
}
/* Give an INSN, return a SET or CLOBBER expression that does modify PAT
(either directly or via STRICT_LOW_PART and similar modifiers). */
rtx
set_of (pat, insn)
rtx pat, insn;
{
struct set_of_data data;
data.found = NULL_RTX;
data.pat = pat;
note_stores (INSN_P (insn) ? PATTERN (insn) : insn, set_of_1, &data);
return data.found;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Given an INSN, return a SET expression if this insn has only a single SET.
It may also have CLOBBERs, USEs, or SET whose output
will not be used, which we ignore. */
rtx
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
single_set_2 (insn, pat)
rtx insn, pat;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx set = NULL;
int set_verified = 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
int 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 (GET_CODE (pat) == PARALLEL)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 < XVECLEN (pat, 0); i++)
{
rtx sub = XVECEXP (pat, 0, i);
switch (GET_CODE (sub))
{
case USE:
case CLOBBER:
break;
case SET:
/* We can consider insns having multiple sets, where all
but one are dead as single set insns. In common case
only single set is present in the pattern so we want
to avoid checking for REG_UNUSED notes unless necessary.
When we reach set first time, we just expect this is
the single set we are looking for and only when more
sets are found in the insn, we check them. */
if (!set_verified)
{
if (find_reg_note (insn, REG_UNUSED, SET_DEST (set))
&& !side_effects_p (set))
set = NULL;
else
set_verified = 1;
}
if (!set)
set = sub, set_verified = 0;
else if (!find_reg_note (insn, REG_UNUSED, SET_DEST (sub))
|| side_effects_p (sub))
return NULL_RTX;
break;
default:
return NULL_RTX;
}
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 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
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Given an INSN, return nonzero if it has more than one SET, else return
zero. */
int
multiple_sets (insn)
rtx insn;
{
int found;
int 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
/* INSN must be an 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))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
return 0;
/* Only a PARALLEL can have multiple SETs. */
if (GET_CODE (PATTERN (insn)) == PARALLEL)
{
for (i = 0, found = 0; i < XVECLEN (PATTERN (insn), 0); i++)
if (GET_CODE (XVECEXP (PATTERN (insn), 0, i)) == SET)
{
/* If we have already found a SET, then return now. */
if (found)
return 1;
else
found = 1;
}
}
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
/* Either zero or one SET. */
return 0;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Return nonzero if the destination of SET equals the source
and there are no side effects. */
int
set_noop_p (set)
rtx set;
{
rtx src = SET_SRC (set);
rtx dst = SET_DEST (set);
if (side_effects_p (src) || side_effects_p (dst))
return 0;
if (GET_CODE (dst) == MEM && GET_CODE (src) == MEM)
return rtx_equal_p (dst, src);
if (dst == pc_rtx && src == pc_rtx)
return 1;
if (GET_CODE (dst) == SIGN_EXTRACT
|| GET_CODE (dst) == ZERO_EXTRACT)
return rtx_equal_p (XEXP (dst, 0), src)
&& ! BYTES_BIG_ENDIAN && XEXP (dst, 2) == const0_rtx;
if (GET_CODE (dst) == STRICT_LOW_PART)
dst = XEXP (dst, 0);
if (GET_CODE (src) == SUBREG && GET_CODE (dst) == SUBREG)
{
if (SUBREG_BYTE (src) != SUBREG_BYTE (dst))
return 0;
src = SUBREG_REG (src);
dst = SUBREG_REG (dst);
}
return (GET_CODE (src) == REG && GET_CODE (dst) == REG
&& REGNO (src) == REGNO (dst));
}
/* Return nonzero if an insn consists only of SETs, each of which only sets a
value to itself. */
int
noop_move_p (insn)
rtx insn;
{
rtx pat = PATTERN (insn);
if (INSN_CODE (insn) == NOOP_MOVE_INSN_CODE)
return 1;
/* Insns carrying these notes are useful later on. */
if (find_reg_note (insn, REG_EQUAL, NULL_RTX))
return 0;
/* For now treat an insn with a REG_RETVAL note as a
a special insn which should not be considered a no-op. */
if (find_reg_note (insn, REG_RETVAL, NULL_RTX))
return 0;
if (GET_CODE (pat) == SET && set_noop_p (pat))
return 1;
if (GET_CODE (pat) == PARALLEL)
{
int i;
/* If nothing but SETs of registers to themselves,
this insn can also be deleted. */
for (i = 0; i < XVECLEN (pat, 0); i++)
{
rtx tem = XVECEXP (pat, 0, i);
if (GET_CODE (tem) == USE
|| GET_CODE (tem) == CLOBBER)
continue;
if (GET_CODE (tem) != SET || ! set_noop_p (tem))
return 0;
}
return 1;
}
return 0;
}
/* Return the last thing that X was assigned from before *PINSN. If VALID_TO
is not NULL_RTX then verify that the object is not modified up to VALID_TO.
If the object was modified, if we hit a partial assignment to X, or hit a
CODE_LABEL first, return X. If we found an assignment, update *PINSN to
point to it. ALLOW_HWREG is set to 1 if hardware registers are allowed to
be the 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
rtx
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
find_last_value (x, pinsn, valid_to, allow_hwreg)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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;
rtx *pinsn;
rtx valid_to;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
int allow_hwreg;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 p;
for (p = PREV_INSN (*pinsn); p && GET_CODE (p) != CODE_LABEL;
p = PREV_INSN (p))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (p))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
rtx set = single_set (p);
rtx note = find_reg_note (p, REG_EQUAL, NULL_RTX);
if (set && rtx_equal_p (x, SET_DEST (set)))
{
rtx src = SET_SRC (set);
if (note && GET_CODE (XEXP (note, 0)) != EXPR_LIST)
src = XEXP (note, 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 ((valid_to == NULL_RTX
|| ! modified_between_p (src, PREV_INSN (p), valid_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
/* Reject hard registers because we don't usually want
to use them; we'd rather use a pseudo. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
&& (! (GET_CODE (src) == REG
&& REGNO (src) < FIRST_PSEUDO_REGISTER) || allow_hwreg))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
*pinsn = p;
return src;
}
}
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
/* If set in non-simple way, we don't have a value. */
if (reg_set_p (x, p))
break;
}
return x;
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
/* Return nonzero if register in range [REGNO, ENDREGNO)
appears either explicitly or implicitly in X
other than being stored into.
References contained within the substructure at LOC do not count.
LOC may be zero, meaning don't ignore anything. */
int
refers_to_regno_p (regno, endregno, x, loc)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 regno, endregno;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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;
rtx *loc;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int i;
unsigned int x_regno;
RTX_CODE code;
const char *fmt;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
repeat:
/* The contents of a REG_NONNEG note is always zero, so we must come here
upon repeat in case the last REG_NOTE is a REG_NONNEG note. */
if (x == 0)
return 0;
code = GET_CODE (x);
switch (code)
{
case REG:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
x_regno = REGNO (x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* If we modifying the stack, frame, or argument pointer, it will
clobber a virtual register. In fact, we could be more precise,
but it isn't worth 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 ((x_regno == STACK_POINTER_REGNUM
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 != ARG_POINTER_REGNUM
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
|| x_regno == ARG_POINTER_REGNUM
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#endif
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
|| x_regno == FRAME_POINTER_REGNUM)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 >= FIRST_VIRTUAL_REGISTER && regno <= LAST_VIRTUAL_REGISTER)
return 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return (endregno > x_regno
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
&& regno < x_regno + (x_regno < 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
? HARD_REGNO_NREGS (x_regno, GET_MODE (x))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
: 1));
case SUBREG:
/* If this is a SUBREG of a hard reg, we can see exactly which
registers are being modified. Otherwise, handle normally. */
if (GET_CODE (SUBREG_REG (x)) == REG
&& REGNO (SUBREG_REG (x)) < 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
unsigned int inner_regno = subreg_regno (x);
unsigned int inner_endregno
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
= inner_regno + (inner_regno < FIRST_PSEUDO_REGISTER
? HARD_REGNO_NREGS (regno, GET_MODE (x)) : 1);
return endregno > inner_regno && regno < inner_endregno;
}
break;
case CLOBBER:
case SET:
if (&SET_DEST (x) != loc
/* Note setting a SUBREG counts as referring to the REG it is in for
a pseudo but not for hard registers since we can
treat each word individually. */
&& ((GET_CODE (SET_DEST (x)) == SUBREG
&& loc != &SUBREG_REG (SET_DEST (x))
&& GET_CODE (SUBREG_REG (SET_DEST (x))) == REG
&& REGNO (SUBREG_REG (SET_DEST (x))) >= FIRST_PSEUDO_REGISTER
&& refers_to_regno_p (regno, endregno,
SUBREG_REG (SET_DEST (x)), loc))
|| (GET_CODE (SET_DEST (x)) != REG
&& refers_to_regno_p (regno, endregno, SET_DEST (x), loc))))
return 1;
if (code == CLOBBER || loc == &SET_SRC (x))
return 0;
x = SET_SRC (x);
goto repeat;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* X does not match, so try its subexpressions. */
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e' && loc != &XEXP (x, i))
{
if (i == 0)
{
x = XEXP (x, 0);
goto repeat;
}
else
if (refers_to_regno_p (regno, endregno, XEXP (x, i), loc))
return 1;
}
else if (fmt[i] == 'E')
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int j;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (j = XVECLEN (x, i) - 1; j >=0; j--)
if (loc != &XVECEXP (x, i, j)
&& refers_to_regno_p (regno, endregno, XVECEXP (x, i, j), loc))
return 1;
}
}
return 0;
}
/* Nonzero if modifying X will affect IN. If X is a register or a SUBREG,
we check if any register number in X conflicts with the relevant register
numbers. If X is a constant, return 0. If X is a MEM, return 1 iff IN
contains a MEM (we don't bother checking for memory addresses that can't
conflict because we expect this to be a rare case. */
int
reg_overlap_mentioned_p (x, in)
rtx x, in;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
unsigned int regno, endregno;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
/* Overly conservative. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (GET_CODE (x) == STRICT_LOW_PART
|| GET_CODE (x) == ZERO_EXTRACT
|| GET_CODE (x) == SIGN_EXTRACT)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
x = XEXP (x, 0);
/* If either argument is a constant, then modifying X can not affect IN. */
if (CONSTANT_P (x) || CONSTANT_P (in))
return 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
switch (GET_CODE (x))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case SUBREG:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 = REGNO (SUBREG_REG (x));
if (regno < 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
regno = subreg_regno (x);
goto do_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
case REG:
regno = REGNO (x);
do_reg:
endregno = regno + (regno < FIRST_PSEUDO_REGISTER
? HARD_REGNO_NREGS (regno, GET_MODE (x)) : 1);
return refers_to_regno_p (regno, endregno, in, (rtx*) 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
case MEM:
{
const char *fmt;
int i;
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 (GET_CODE (in) == MEM)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
return 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
fmt = GET_RTX_FORMAT (GET_CODE (in));
for (i = GET_RTX_LENGTH (GET_CODE (in)) - 1; i >= 0; i--)
if (fmt[i] == 'e' && reg_overlap_mentioned_p (x, XEXP (in, i)))
return 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 0;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case SCRATCH:
case PC:
case CC0:
return reg_mentioned_p (x, in);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
case PARALLEL:
{
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
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* If any register in here refers to it we return true. */
for (i = XVECLEN (x, 0) - 1; i >= 0; i--)
if (XEXP (XVECEXP (x, 0, i), 0) != 0
&& reg_overlap_mentioned_p (XEXP (XVECEXP (x, 0, i), 0), in))
return 1;
return 0;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
default:
break;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
abort ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Return the last value to which REG was set prior to INSN. If we can't
find it easily, return 0.
We only return a REG, SUBREG, or constant because it is too hard to
check if a MEM remains unchanged. */
rtx
reg_set_last (x, insn)
rtx x;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx insn;
{
rtx orig_insn = insn;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Scan backwards until reg_set_last_1 changed one of the above flags.
Stop when we reach a label or X is a hard reg and we reach a
CALL_INSN (if reg_set_last_last_regno is a hard 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
If we find a set of X, ensure that its SET_SRC remains unchanged. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* We compare with <= here, because reg_set_last_last_regno
is actually the number of the first reg *not* in X. */
for (;
insn && GET_CODE (insn) != CODE_LABEL
&& ! (GET_CODE (insn) == CALL_INSN
&& REGNO (x) <= FIRST_PSEUDO_REGISTER);
insn = PREV_INSN (insn))
if (INSN_P (insn))
{
rtx set = set_of (x, insn);
/* OK, this function modify our register. See if we understand it. */
if (set)
{
rtx last_value;
if (GET_CODE (set) != SET || SET_DEST (set) != x)
return 0;
last_value = SET_SRC (x);
if (CONSTANT_P (last_value)
|| ((GET_CODE (last_value) == REG
|| GET_CODE (last_value) == SUBREG)
&& ! reg_set_between_p (last_value,
insn, orig_insn)))
return last_value;
else
return 0;
}
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Call FUN on each register or MEM that is stored into or clobbered by X.
(X would be the pattern of an insn).
FUN receives two arguments:
the REG, MEM, CC0 or PC being stored in or clobbered,
the SET or CLOBBER rtx that does the store.
If the item being stored in or clobbered is a SUBREG of a hard register,
the SUBREG will be passed. */
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
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
note_stores (x, fun, data)
rtx x;
void (*fun) PARAMS ((rtx, rtx, void *));
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
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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;
if (GET_CODE (x) == COND_EXEC)
x = COND_EXEC_CODE (x);
if (GET_CODE (x) == SET || GET_CODE (x) == 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
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 dest = SET_DEST (x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
while ((GET_CODE (dest) == SUBREG
&& (GET_CODE (SUBREG_REG (dest)) != REG
|| REGNO (SUBREG_REG (dest)) >= FIRST_PSEUDO_REGISTER))
|| GET_CODE (dest) == ZERO_EXTRACT
|| GET_CODE (dest) == SIGN_EXTRACT
|| GET_CODE (dest) == STRICT_LOW_PART)
dest = XEXP (dest, 0);
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 we have a PARALLEL, SET_DEST is a list of EXPR_LIST expressions,
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
each of whose first operand is a 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
if (GET_CODE (dest) == PARALLEL)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
for (i = XVECLEN (dest, 0) - 1; i >= 0; 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 (XEXP (XVECEXP (dest, 0, i), 0) != 0)
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
(*fun) (XEXP (XVECEXP (dest, 0, i), 0), x, data);
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
(*fun) (dest, x, 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
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
else if (GET_CODE (x) == PARALLEL)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 = XVECLEN (x, 0) - 1; i >= 0; i--)
note_stores (XVECEXP (x, 0, i), fun, data);
}
/* Like notes_stores, but call FUN for each expression that is being
referenced in PBODY, a pointer to the PATTERN of an insn. We only call
FUN for each expression, not any interior subexpressions. FUN receives a
pointer to the expression and the DATA passed to this function.
Note that this is not quite the same test as that done in reg_referenced_p
since that considers something as being referenced if it is being
partially set, while we do not. */
void
note_uses (pbody, fun, data)
rtx *pbody;
void (*fun) PARAMS ((rtx *, void *));
void *data;
{
rtx body = *pbody;
int i;
switch (GET_CODE (body))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case COND_EXEC:
(*fun) (&COND_EXEC_TEST (body), data);
note_uses (&COND_EXEC_CODE (body), fun, data);
return;
case PARALLEL:
for (i = XVECLEN (body, 0) - 1; i >= 0; i--)
note_uses (&XVECEXP (body, 0, i), fun, data);
return;
case USE:
(*fun) (&XEXP (body, 0), data);
return;
case ASM_OPERANDS:
for (i = ASM_OPERANDS_INPUT_LENGTH (body) - 1; i >= 0; i--)
(*fun) (&ASM_OPERANDS_INPUT (body, i), data);
return;
case TRAP_IF:
(*fun) (&TRAP_CONDITION (body), data);
return;
case PREFETCH:
(*fun) (&XEXP (body, 0), data);
return;
case UNSPEC:
case UNSPEC_VOLATILE:
for (i = XVECLEN (body, 0) - 1; i >= 0; i--)
(*fun) (&XVECEXP (body, 0, i), data);
return;
case CLOBBER:
if (GET_CODE (XEXP (body, 0)) == MEM)
(*fun) (&XEXP (XEXP (body, 0), 0), data);
return;
case SET:
{
rtx dest = SET_DEST (body);
/* For sets we replace everything in source plus registers in memory
expression in store and operands of a ZERO_EXTRACT. */
(*fun) (&SET_SRC (body), data);
if (GET_CODE (dest) == ZERO_EXTRACT)
{
(*fun) (&XEXP (dest, 1), data);
(*fun) (&XEXP (dest, 2), data);
}
while (GET_CODE (dest) == SUBREG || GET_CODE (dest) == STRICT_LOW_PART)
dest = XEXP (dest, 0);
if (GET_CODE (dest) == MEM)
(*fun) (&XEXP (dest, 0), data);
}
return;
default:
/* All the other possibilities never store. */
(*fun) (pbody, data);
return;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
}
/* Return nonzero if X's old contents don't survive after INSN.
This will be true if X is (cc0) or if X is a register and
X dies in INSN or because INSN entirely sets X.
"Entirely set" means set directly and not through a SUBREG,
ZERO_EXTRACT or SIGN_EXTRACT, so no trace of the old contents remains.
Likewise, REG_INC does not count.
REG may be a hard or pseudo reg. Renumbering is not taken into account,
but for this use that makes no difference, since regs don't overlap
during their lifetimes. Therefore, this function may be used
at any time after deaths have been computed (in flow.c).
If REG is a hard reg that occupies multiple machine registers, this
function will only return 1 if each of those registers will be replaced
by INSN. */
int
dead_or_set_p (insn, x)
rtx insn;
rtx x;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
unsigned int regno, last_regno;
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
/* Can't use cc0_rtx below since this file is used by genattrtab.c. */
if (GET_CODE (x) == CC0)
return 1;
if (GET_CODE (x) != REG)
abort ();
regno = REGNO (x);
last_regno = (regno >= FIRST_PSEUDO_REGISTER ? regno
: regno + HARD_REGNO_NREGS (regno, GET_MODE (x)) - 1);
for (i = regno; i <= last_regno; i++)
if (! dead_or_set_regno_p (insn, i))
return 0;
return 1;
}
/* Utility function for dead_or_set_p to check an individual register. Also
called from flow.c. */
int
dead_or_set_regno_p (insn, test_regno)
rtx insn;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
unsigned int test_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
unsigned int regno, endregno;
rtx pattern;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
/* See if there is a death note for something that includes TEST_REGNO. */
if (find_regno_note (insn, REG_DEAD, test_regno))
return 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (GET_CODE (insn) == CALL_INSN
&& find_regno_fusage (insn, CLOBBER, test_regno))
return 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
pattern = PATTERN (insn);
if (GET_CODE (pattern) == COND_EXEC)
pattern = COND_EXEC_CODE (pattern);
if (GET_CODE (pattern) == 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
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
rtx dest = SET_DEST (pattern);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 value is totally replaced if it is the destination or the
destination is a SUBREG of REGNO that does not change the number of
words in it. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (GET_CODE (dest) == SUBREG
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
&& (((GET_MODE_SIZE (GET_MODE (dest))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)
== ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest)))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)))
dest = SUBREG_REG (dest);
if (GET_CODE (dest) != REG)
return 0;
regno = REGNO (dest);
endregno = (regno >= FIRST_PSEUDO_REGISTER ? regno + 1
: regno + HARD_REGNO_NREGS (regno, GET_MODE (dest)));
return (test_regno >= regno && test_regno < endregno);
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (GET_CODE (pattern) == PARALLEL)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int i;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 = XVECLEN (pattern, 0) - 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
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 body = XVECEXP (pattern, 0, i);
if (GET_CODE (body) == COND_EXEC)
body = COND_EXEC_CODE (body);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (GET_CODE (body) == SET || GET_CODE (body) == CLOBBER)
{
rtx dest = SET_DEST (body);
if (GET_CODE (dest) == SUBREG
&& (((GET_MODE_SIZE (GET_MODE (dest))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)
== ((GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest)))
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)))
dest = SUBREG_REG (dest);
if (GET_CODE (dest) != REG)
continue;
regno = REGNO (dest);
endregno = (regno >= FIRST_PSEUDO_REGISTER ? regno + 1
: regno + HARD_REGNO_NREGS (regno, GET_MODE (dest)));
if (test_regno >= regno && test_regno < endregno)
return 1;
}
}
}
return 0;
}
/* Return the reg-note of kind KIND in insn INSN, if there is one.
If DATUM is nonzero, look for one whose datum is DATUM. */
rtx
find_reg_note (insn, kind, datum)
rtx insn;
enum reg_note kind;
rtx datum;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 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
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Ignore anything that is not an INSN, JUMP_INSN or CALL_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))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == kind
&& (datum == 0 || datum == XEXP (link, 0)))
return link;
return 0;
}
/* Return the reg-note of kind KIND in insn INSN which applies to register
number REGNO, if any. Return 0 if there is no such reg-note. Note that
the REGNO of this NOTE need not be REGNO if REGNO is a hard register;
it might be the case that the note overlaps REGNO. */
rtx
find_regno_note (insn, kind, regno)
rtx insn;
enum reg_note kind;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 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
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
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Ignore anything that is not an INSN, JUMP_INSN or CALL_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))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == kind
/* Verify that it is a register, so that scratch and MEM won't cause a
problem here. */
&& GET_CODE (XEXP (link, 0)) == REG
&& REGNO (XEXP (link, 0)) <= regno
&& ((REGNO (XEXP (link, 0))
+ (REGNO (XEXP (link, 0)) >= FIRST_PSEUDO_REGISTER ? 1
: HARD_REGNO_NREGS (REGNO (XEXP (link, 0)),
GET_MODE (XEXP (link, 0)))))
> regno))
return link;
return 0;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Return a REG_EQUIV or REG_EQUAL note if insn has only a single set and
has such a note. */
rtx
find_reg_equal_equiv_note (insn)
rtx insn;
{
rtx note;
if (single_set (insn) == 0)
return 0;
else if ((note = find_reg_note (insn, REG_EQUIV, NULL_RTX)) != 0)
return note;
else
return find_reg_note (insn, REG_EQUAL, NULL_RTX);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Return true if DATUM, or any overlap of DATUM, of kind CODE is found
in the CALL_INSN_FUNCTION_USAGE information of INSN. */
int
find_reg_fusage (insn, code, datum)
rtx insn;
enum rtx_code code;
rtx datum;
{
/* If it's not a CALL_INSN, it can't possibly have a
CALL_INSN_FUNCTION_USAGE field, so don't bother checking. */
if (GET_CODE (insn) != CALL_INSN)
return 0;
if (! datum)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
abort ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (GET_CODE (datum) != 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
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
for (link = CALL_INSN_FUNCTION_USAGE (insn);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
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
link = XEXP (link, 1))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (GET_CODE (XEXP (link, 0)) == code
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& rtx_equal_p (datum, XEXP (XEXP (link, 0), 0)))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
return 1;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
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
unsigned int regno = REGNO (datum);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* CALL_INSN_FUNCTION_USAGE information cannot contain references
to pseudo registers, so don't bother checking. */
if (regno < FIRST_PSEUDO_REGISTER)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +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 end_regno
= regno + HARD_REGNO_NREGS (regno, GET_MODE (datum));
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
for (i = regno; i < end_regno; i++)
if (find_regno_fusage (insn, code, i))
return 1;
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
}
return 0;
}
/* Return true if REGNO, or any overlap of REGNO, of kind CODE is found
in the CALL_INSN_FUNCTION_USAGE information of INSN. */
int
find_regno_fusage (insn, code, regno)
rtx insn;
enum rtx_code code;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
unsigned 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
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
/* CALL_INSN_FUNCTION_USAGE information cannot contain references
to pseudo registers, so don't bother checking. */
if (regno >= FIRST_PSEUDO_REGISTER
|| GET_CODE (insn) != CALL_INSN )
return 0;
for (link = CALL_INSN_FUNCTION_USAGE (insn); link; link = XEXP (link, 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
{
unsigned int regnote;
rtx op, reg;
if (GET_CODE (op = XEXP (link, 0)) == code
&& GET_CODE (reg = XEXP (op, 0)) == REG
&& (regnote = REGNO (reg)) <= regno
&& regnote + HARD_REGNO_NREGS (regnote, GET_MODE (reg)) > regno)
return 1;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 0;
}
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
/* Return true if INSN is a call to a pure function. */
int
pure_call_p (insn)
rtx insn;
{
rtx link;
if (GET_CODE (insn) != CALL_INSN || ! CONST_OR_PURE_CALL_P (insn))
return 0;
/* Look for the note that differentiates const and pure functions. */
for (link = CALL_INSN_FUNCTION_USAGE (insn); link; link = XEXP (link, 1))
{
rtx u, m;
if (GET_CODE (u = XEXP (link, 0)) == USE
&& GET_CODE (m = XEXP (u, 0)) == MEM && GET_MODE (m) == BLKmode
&& GET_CODE (XEXP (m, 0)) == SCRATCH)
return 1;
}
return 0;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Remove register note NOTE from the REG_NOTES of INSN. */
void
remove_note (insn, note)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
rtx insn;
rtx note;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 link;
if (note == NULL_RTX)
return;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (REG_NOTES (insn) == note)
{
REG_NOTES (insn) = XEXP (note, 1);
return;
}
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
if (XEXP (link, 1) == note)
{
XEXP (link, 1) = XEXP (note, 1);
return;
}
abort ();
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Search LISTP (an EXPR_LIST) for an entry whose first operand is NODE and
return 1 if it is found. A simple equality test is used to determine if
NODE matches. */
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
int
in_expr_list_p (listp, node)
rtx listp;
rtx node;
{
rtx x;
for (x = listp; x; x = XEXP (x, 1))
if (node == XEXP (x, 0))
return 1;
return 0;
}
/* Search LISTP (an EXPR_LIST) for an entry whose first operand is NODE and
remove that entry from the list if it is found.
A simple equality test is used to determine if NODE matches. */
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
void
remove_node_from_expr_list (node, listp)
rtx node;
rtx *listp;
{
rtx temp = *listp;
rtx prev = NULL_RTX;
while (temp)
{
if (node == XEXP (temp, 0))
{
/* Splice the node out of the list. */
if (prev)
XEXP (prev, 1) = XEXP (temp, 1);
else
*listp = XEXP (temp, 1);
return;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
prev = temp;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
temp = XEXP (temp, 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
/* Nonzero if X contains any volatile instructions. These are instructions
which may cause unpredictable machine state instructions, and thus no
instructions should be moved or combined across them. This includes
only volatile asms and UNSPEC_VOLATILE instructions. */
int
volatile_insn_p (x)
rtx x;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
RTX_CODE code;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
code = GET_CODE (x);
switch (code)
{
case LABEL_REF:
case SYMBOL_REF:
case CONST_INT:
case CONST:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CC0:
case PC:
case REG:
case SCRATCH:
case CLOBBER:
case ADDR_VEC:
case ADDR_DIFF_VEC:
case CALL:
case MEM:
return 0;
case UNSPEC_VOLATILE:
/* case TRAP_IF: This isn't clear yet. */
return 1;
Gcc 3.2.2-release.
2003-02-10 05:41:50 +00:00
case ASM_INPUT:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case ASM_OPERANDS:
if (MEM_VOLATILE_P (x))
return 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Recursively scan the operands of this expression. */
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *fmt = GET_RTX_FORMAT (code);
int i;
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
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
{
if (volatile_insn_p (XEXP (x, i)))
return 1;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (fmt[i] == 'E')
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
for (j = 0; j < XVECLEN (x, i); j++)
if (volatile_insn_p (XVECEXP (x, i, j)))
return 1;
}
}
}
return 0;
}
/* Nonzero if X contains any volatile memory references
UNSPEC_VOLATILE operations or volatile ASM_OPERANDS expressions. */
int
volatile_refs_p (x)
rtx x;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
RTX_CODE code;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
code = GET_CODE (x);
switch (code)
{
case LABEL_REF:
case SYMBOL_REF:
case CONST_INT:
case CONST:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CC0:
case PC:
case REG:
case SCRATCH:
case CLOBBER:
case ADDR_VEC:
case ADDR_DIFF_VEC:
return 0;
case UNSPEC_VOLATILE:
return 1;
case MEM:
Gcc 3.2.2-release.
2003-02-10 05:41:50 +00:00
case ASM_INPUT:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case ASM_OPERANDS:
if (MEM_VOLATILE_P (x))
return 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Recursively scan the operands of this expression. */
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *fmt = GET_RTX_FORMAT (code);
int i;
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
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
{
if (volatile_refs_p (XEXP (x, i)))
return 1;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (fmt[i] == 'E')
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
for (j = 0; j < XVECLEN (x, i); j++)
if (volatile_refs_p (XVECEXP (x, i, j)))
return 1;
}
}
}
return 0;
}
/* Similar to above, except that it also rejects register pre- and post-
incrementing. */
int
side_effects_p (x)
rtx x;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
RTX_CODE code;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
code = GET_CODE (x);
switch (code)
{
case LABEL_REF:
case SYMBOL_REF:
case CONST_INT:
case CONST:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CC0:
case PC:
case REG:
case SCRATCH:
case ADDR_VEC:
case ADDR_DIFF_VEC:
return 0;
case CLOBBER:
/* Reject CLOBBER with a non-VOID mode. These are made by combine.c
when some combination can't be done. If we see one, don't think
that we can simplify the expression. */
return (GET_MODE (x) != VOIDmode);
case PRE_INC:
case PRE_DEC:
case POST_INC:
case POST_DEC:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case PRE_MODIFY:
case POST_MODIFY:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CALL:
case UNSPEC_VOLATILE:
/* case TRAP_IF: This isn't clear yet. */
return 1;
case MEM:
Gcc 3.2.2-release.
2003-02-10 05:41:50 +00:00
case ASM_INPUT:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case ASM_OPERANDS:
if (MEM_VOLATILE_P (x))
return 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
/* Recursively scan the operands of this expression. */
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *fmt = GET_RTX_FORMAT (code);
int i;
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
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
{
if (side_effects_p (XEXP (x, i)))
return 1;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (fmt[i] == 'E')
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
for (j = 0; j < XVECLEN (x, i); j++)
if (side_effects_p (XVECEXP (x, i, j)))
return 1;
}
}
}
return 0;
}
/* Return nonzero if evaluating rtx X might cause a trap. */
int
may_trap_p (x)
rtx x;
{
int i;
enum rtx_code code;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *fmt;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (x == 0)
return 0;
code = GET_CODE (x);
switch (code)
{
/* Handle these cases quickly. */
case CONST_INT:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case SYMBOL_REF:
case LABEL_REF:
case CONST:
case PC:
case CC0:
case REG:
case SCRATCH:
return 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case ASM_INPUT:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case UNSPEC_VOLATILE:
case TRAP_IF:
return 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case ASM_OPERANDS:
return MEM_VOLATILE_P (x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* Memory ref can trap unless it's a static var or a stack slot. */
case MEM:
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (MEM_NOTRAP_P (x))
return 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return rtx_addr_can_trap_p (XEXP (x, 0));
/* Division by a non-constant might trap. */
case DIV:
case MOD:
case UDIV:
case UMOD:
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (HONOR_SNANS (GET_MODE (x)))
return 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (! CONSTANT_P (XEXP (x, 1))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
|| (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT
&& flag_trapping_math))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 1;
/* This was const0_rtx, but by not using that,
we can link this file into other programs. */
if (GET_CODE (XEXP (x, 1)) == CONST_INT && INTVAL (XEXP (x, 1)) == 0)
return 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case EXPR_LIST:
/* An EXPR_LIST is used to represent a function call. This
certainly may trap. */
return 1;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case GE:
case GT:
case LE:
case LT:
case COMPARE:
/* Some floating point comparisons may trap. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (!flag_trapping_math)
break;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* ??? There is no machine independent way to check for tests that trap
when COMPARE is used, though many targets do make this distinction.
For instance, sparc uses CCFPE for compares which generate exceptions
and CCFP for compares which do not generate exceptions. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (HONOR_NANS (GET_MODE (x)))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 1;
/* But often the compare has some CC mode, so check operand
modes as well. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (HONOR_NANS (GET_MODE (XEXP (x, 0)))
|| HONOR_NANS (GET_MODE (XEXP (x, 1))))
return 1;
break;
case EQ:
case NE:
if (HONOR_SNANS (GET_MODE (x)))
return 1;
/* Often comparison is CC mode, so check operand modes. */
if (HONOR_SNANS (GET_MODE (XEXP (x, 0)))
|| HONOR_SNANS (GET_MODE (XEXP (x, 1))))
return 1;
break;
case FIX:
/* Conversion of floating point might trap. */
if (flag_trapping_math && HONOR_NANS (GET_MODE (XEXP (x, 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
return 1;
break;
case NEG:
case ABS:
/* These operations don't trap even with floating point. */
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
default:
/* Any floating arithmetic may trap. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT
&& flag_trapping_math)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 1;
}
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
{
if (may_trap_p (XEXP (x, i)))
return 1;
}
else if (fmt[i] == 'E')
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int j;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (j = 0; j < XVECLEN (x, i); j++)
if (may_trap_p (XVECEXP (x, i, j)))
return 1;
}
}
return 0;
}
/* Return nonzero if X contains a comparison that is not either EQ or NE,
i.e., an inequality. */
int
inequality_comparisons_p (x)
rtx x;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *fmt;
int len, i;
enum rtx_code code = GET_CODE (x);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
switch (code)
{
case REG:
case SCRATCH:
case PC:
case CC0:
case CONST_INT:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CONST:
case LABEL_REF:
case SYMBOL_REF:
return 0;
case LT:
case LTU:
case GT:
case GTU:
case LE:
case LEU:
case GE:
case GEU:
return 1;
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
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
len = GET_RTX_LENGTH (code);
fmt = GET_RTX_FORMAT (code);
for (i = 0; i < len; i++)
{
if (fmt[i] == 'e')
{
if (inequality_comparisons_p (XEXP (x, i)))
return 1;
}
else if (fmt[i] == 'E')
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int j;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (j = XVECLEN (x, i) - 1; j >= 0; j--)
if (inequality_comparisons_p (XVECEXP (x, i, j)))
return 1;
}
}
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
return 0;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Replace any occurrence of FROM in X with TO. The function does
not enter into CONST_DOUBLE for the replace.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 copying is not done so X must not be shared unless all copies
are to be modified. */
rtx
replace_rtx (x, from, to)
rtx x, from, to;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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;
const char *fmt;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
/* The following prevents loops occurrence when we change MEM in
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
CONST_DOUBLE onto the same CONST_DOUBLE. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
if (x != 0 && GET_CODE (x) == CONST_DOUBLE)
return x;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (x == from)
return to;
/* Allow this function to make replacements in EXPR_LISTs. */
if (x == 0)
return 0;
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
if (GET_CODE (x) == SUBREG)
{
rtx new = replace_rtx (SUBREG_REG (x), from, to);
if (GET_CODE (new) == CONST_INT)
{
x = simplify_subreg (GET_MODE (x), new,
GET_MODE (SUBREG_REG (x)),
SUBREG_BYTE (x));
if (! x)
abort ();
}
else
SUBREG_REG (x) = new;
return x;
}
else if (GET_CODE (x) == ZERO_EXTEND)
{
rtx new = replace_rtx (XEXP (x, 0), from, to);
if (GET_CODE (new) == CONST_INT)
{
x = simplify_unary_operation (ZERO_EXTEND, GET_MODE (x),
new, GET_MODE (XEXP (x, 0)));
if (! x)
abort ();
}
else
XEXP (x, 0) = new;
return x;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
fmt = GET_RTX_FORMAT (GET_CODE (x));
for (i = GET_RTX_LENGTH (GET_CODE (x)) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
XEXP (x, i) = replace_rtx (XEXP (x, i), from, to);
else if (fmt[i] == 'E')
for (j = XVECLEN (x, i) - 1; j >= 0; j--)
XVECEXP (x, i, j) = replace_rtx (XVECEXP (x, i, j), from, to);
}
return x;
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
/* Throughout the rtx X, replace many registers according to REG_MAP.
Return the replacement for X (which may be X with altered contents).
REG_MAP[R] is the replacement for register R, or 0 for don't replace.
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
NREGS is the length of REG_MAP; regs >= NREGS are not mapped.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 only support REG_MAP entries of REG or SUBREG. Also, hard registers
should not be mapped to pseudos or vice versa since validate_change
is not called.
If REPLACE_DEST is 1, replacements are also done in destinations;
otherwise, only sources are replaced. */
rtx
replace_regs (x, reg_map, nregs, replace_dest)
rtx x;
rtx *reg_map;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 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
int replace_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
enum rtx_code code;
int i;
const char *fmt;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 (x == 0)
return x;
code = GET_CODE (x);
switch (code)
{
case SCRATCH:
case PC:
case CC0:
case CONST_INT:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
case CONST:
case SYMBOL_REF:
case LABEL_REF:
return x;
case REG:
/* Verify that the register has an entry before trying to access it. */
if (REGNO (x) < nregs && reg_map[REGNO (x)] != 0)
{
/* SUBREGs can't be shared. Always return a copy to ensure that if
this replacement occurs more than once then each instance will
get distinct rtx. */
if (GET_CODE (reg_map[REGNO (x)]) == SUBREG)
return copy_rtx (reg_map[REGNO (x)]);
return reg_map[REGNO (x)];
}
return x;
case SUBREG:
/* Prevent making nested SUBREGs. */
if (GET_CODE (SUBREG_REG (x)) == REG && REGNO (SUBREG_REG (x)) < nregs
&& reg_map[REGNO (SUBREG_REG (x))] != 0
&& GET_CODE (reg_map[REGNO (SUBREG_REG (x))]) == SUBREG)
{
rtx map_val = reg_map[REGNO (SUBREG_REG (x))];
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return simplify_gen_subreg (GET_MODE (x), map_val,
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GET_MODE (SUBREG_REG (x)),
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
SUBREG_BYTE (x));
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
break;
case SET:
if (replace_dest)
SET_DEST (x) = replace_regs (SET_DEST (x), reg_map, nregs, 0);
else if (GET_CODE (SET_DEST (x)) == MEM
|| GET_CODE (SET_DEST (x)) == STRICT_LOW_PART)
/* Even if we are not to replace destinations, replace register if it
is CONTAINED in destination (destination is memory or
STRICT_LOW_PART). */
XEXP (SET_DEST (x), 0) = replace_regs (XEXP (SET_DEST (x), 0),
reg_map, nregs, 0);
else if (GET_CODE (SET_DEST (x)) == ZERO_EXTRACT)
/* Similarly, for ZERO_EXTRACT we replace all operands. */
break;
SET_SRC (x) = replace_regs (SET_SRC (x), reg_map, nregs, 0);
return x;
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
default:
break;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
}
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
XEXP (x, i) = replace_regs (XEXP (x, i), reg_map, nregs, replace_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
else if (fmt[i] == 'E')
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
for (j = 0; j < XVECLEN (x, i); j++)
XVECEXP (x, i, j) = replace_regs (XVECEXP (x, i, j), reg_map,
nregs, replace_dest);
}
}
return x;
}
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
/* A subroutine of computed_jump_p, return 1 if X contains a REG or MEM or
constant that is not in the constant pool and not in the condition
of an IF_THEN_ELSE. */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
static int
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
computed_jump_p_1 (x)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
rtx x;
{
enum rtx_code code = GET_CODE (x);
int 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
const char *fmt;
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
switch (code)
{
case LABEL_REF:
case PC:
return 0;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case CONST:
case CONST_INT:
case CONST_DOUBLE:
Gcc 3.1.0 pre-release from the FSF anoncvs repo on 9-May-2002 15:57:15 EDT.
2002-05-09 20:02:13 +00:00
case CONST_VECTOR:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
case SYMBOL_REF:
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
case REG:
return 1;
case MEM:
return ! (GET_CODE (XEXP (x, 0)) == SYMBOL_REF
&& CONSTANT_POOL_ADDRESS_P (XEXP (x, 0)));
case IF_THEN_ELSE:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return (computed_jump_p_1 (XEXP (x, 1))
|| computed_jump_p_1 (XEXP (x, 2)));
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
default:
break;
}
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (fmt[i] == 'e'
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& computed_jump_p_1 (XEXP (x, i)))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 1;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else if (fmt[i] == 'E')
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
for (j = 0; j < XVECLEN (x, 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
if (computed_jump_p_1 (XVECEXP (x, i, j)))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 1;
}
return 0;
}
/* Return nonzero if INSN is an indirect jump (aka computed jump).
Tablejumps and casesi insns are not considered indirect jumps;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
we can recognize them by a (use (label_ref)). */
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
int
computed_jump_p (insn)
rtx insn;
{
int i;
if (GET_CODE (insn) == JUMP_INSN)
{
rtx pat = PATTERN (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 (find_reg_note (insn, REG_LABEL, NULL_RTX))
return 0;
else if (GET_CODE (pat) == PARALLEL)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
int len = XVECLEN (pat, 0);
int has_use_labelref = 0;
for (i = len - 1; i >= 0; i--)
if (GET_CODE (XVECEXP (pat, 0, i)) == USE
&& (GET_CODE (XEXP (XVECEXP (pat, 0, i), 0))
== LABEL_REF))
has_use_labelref = 1;
if (! has_use_labelref)
for (i = len - 1; i >= 0; i--)
if (GET_CODE (XVECEXP (pat, 0, i)) == SET
&& SET_DEST (XVECEXP (pat, 0, i)) == pc_rtx
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& computed_jump_p_1 (SET_SRC (XVECEXP (pat, 0, i))))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 1;
}
else if (GET_CODE (pat) == SET
&& SET_DEST (pat) == pc_rtx
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
&& computed_jump_p_1 (SET_SRC (pat)))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
return 1;
}
return 0;
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Traverse X via depth-first search, calling F for each
sub-expression (including X itself). F is also passed the DATA.
If F returns -1, do not traverse sub-expressions, but continue
traversing the rest of the tree. If F ever returns any other
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
nonzero value, stop the traversal, and return the value returned
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
by F. Otherwise, return 0. This function does not traverse inside
tree structure that contains RTX_EXPRs, or into sub-expressions
whose format code is `0' since it is not known whether or not those
codes are actually RTL.
This routine is very general, and could (should?) be used to
implement many of the other routines in this file. */
int
for_each_rtx (x, f, data)
rtx *x;
rtx_function f;
void *data;
{
int result;
int length;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *format;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
int i;
/* Call F on X. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
result = (*f) (x, data);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
if (result == -1)
/* Do not traverse sub-expressions. */
return 0;
else if (result != 0)
/* Stop the traversal. */
return result;
if (*x == NULL_RTX)
/* There are no sub-expressions. */
return 0;
length = GET_RTX_LENGTH (GET_CODE (*x));
format = GET_RTX_FORMAT (GET_CODE (*x));
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
for (i = 0; i < length; ++i)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
switch (format[i])
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
case 'e':
result = for_each_rtx (&XEXP (*x, i), f, data);
if (result != 0)
return result;
break;
case 'V':
case 'E':
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (XVEC (*x, i) != 0)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
int j;
for (j = 0; j < XVECLEN (*x, i); ++j)
{
result = for_each_rtx (&XVECEXP (*x, i, j), f, data);
if (result != 0)
return result;
}
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
break;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
default:
/* Nothing to do. */
break;
}
}
return 0;
}
/* Searches X for any reference to REGNO, returning the rtx of the
reference found if any. Otherwise, returns NULL_RTX. */
rtx
regno_use_in (regno, x)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
unsigned int regno;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
rtx x;
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
const char *fmt;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
int i, j;
rtx tem;
if (GET_CODE (x) == REG && REGNO (x) == regno)
return x;
fmt = GET_RTX_FORMAT (GET_CODE (x));
for (i = GET_RTX_LENGTH (GET_CODE (x)) - 1; i >= 0; i--)
{
if (fmt[i] == 'e')
{
if ((tem = regno_use_in (regno, XEXP (x, i))))
return tem;
}
else if (fmt[i] == 'E')
for (j = XVECLEN (x, i) - 1; j >= 0; j--)
if ((tem = regno_use_in (regno , XVECEXP (x, i, j))))
return tem;
}
return NULL_RTX;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Return a value indicating whether OP, an operand of a commutative
operation, is preferred as the first or second operand. The higher
the value, the stronger the preference for being the first operand.
We use negative values to indicate a preference for the first operand
and positive values for the second operand. */
int
commutative_operand_precedence (op)
rtx op;
{
/* Constants always come the second operand. Prefer "nice" constants. */
if (GET_CODE (op) == CONST_INT)
return -5;
if (GET_CODE (op) == CONST_DOUBLE)
return -4;
if (CONSTANT_P (op))
return -3;
/* SUBREGs of objects should come second. */
if (GET_CODE (op) == SUBREG
&& GET_RTX_CLASS (GET_CODE (SUBREG_REG (op))) == 'o')
return -2;
/* If only one operand is a `neg', `not',
`mult', `plus', or `minus' expression, it will be the first
operand. */
if (GET_CODE (op) == NEG || GET_CODE (op) == NOT
|| GET_CODE (op) == MULT || GET_CODE (op) == PLUS
|| GET_CODE (op) == MINUS)
return 2;
/* Complex expressions should be the first, so decrease priority
of objects. */
if (GET_RTX_CLASS (GET_CODE (op)) == 'o')
return -1;
return 0;
}
/* Return 1 iff it is necessary to swap operands of commutative operation
in order to canonicalize expression. */
int
swap_commutative_operands_p (x, y)
rtx x, y;
{
return (commutative_operand_precedence (x)
< commutative_operand_precedence (y));
}
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Return 1 if X is an autoincrement side effect and the register is
not the stack pointer. */
int
auto_inc_p (x)
rtx x;
{
switch (GET_CODE (x))
{
case PRE_INC:
case POST_INC:
case PRE_DEC:
case POST_DEC:
case PRE_MODIFY:
case POST_MODIFY:
/* There are no REG_INC notes for SP. */
if (XEXP (x, 0) != stack_pointer_rtx)
return 1;
default:
break;
}
return 0;
}
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
/* Return 1 if the sequence of instructions beginning with FROM and up
to and including TO is safe to move. If NEW_TO is non-NULL, and
the sequence is not already safe to move, but can be easily
extended to a sequence which is safe, then NEW_TO will point to the
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
end of the extended sequence.
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
For now, this function only checks that the region contains whole
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
exception regions, but it could be extended to check additional
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
conditions as well. */
int
insns_safe_to_move_p (from, to, new_to)
rtx from;
rtx to;
rtx *new_to;
{
int eh_region_count = 0;
int past_to_p = 0;
rtx r = from;
/* By default, assume the end of the region will be what was
suggested. */
if (new_to)
*new_to = to;
while (r)
{
if (GET_CODE (r) == NOTE)
{
switch (NOTE_LINE_NUMBER (r))
{
case NOTE_INSN_EH_REGION_BEG:
++eh_region_count;
break;
case NOTE_INSN_EH_REGION_END:
if (eh_region_count == 0)
/* This sequence of instructions contains the end of
an exception region, but not he beginning. Moving
it will cause chaos. */
return 0;
--eh_region_count;
break;
default:
break;
}
}
else if (past_to_p)
/* If we've passed TO, and we see a non-note instruction, we
can't extend the sequence to a movable sequence. */
return 0;
if (r == to)
{
if (!new_to)
/* It's OK to move the sequence if there were matched sets of
exception region notes. */
return eh_region_count == 0;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
past_to_p = 1;
}
/* It's OK to move the sequence if there were matched sets of
exception region notes. */
if (past_to_p && eh_region_count == 0)
{
*new_to = r;
return 1;
}
/* Go to the next instruction. */
r = NEXT_INSN (r);
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
return 0;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* Return nonzero if IN contains a piece of rtl that has the address LOC */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
loc_mentioned_in_p (loc, in)
rtx *loc, in;
{
enum rtx_code code = GET_CODE (in);
const char *fmt = GET_RTX_FORMAT (code);
int i, j;
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
{
if (loc == &in->fld[i].rtx)
return 1;
if (fmt[i] == 'e')
{
if (loc_mentioned_in_p (loc, XEXP (in, i)))
return 1;
}
else if (fmt[i] == 'E')
for (j = XVECLEN (in, i) - 1; j >= 0; j--)
if (loc_mentioned_in_p (loc, XVECEXP (in, i, j)))
return 1;
}
return 0;
}
/* Given a subreg X, return the bit offset where the subreg begins
(counting from the least significant bit of the reg). */
unsigned int
subreg_lsb (x)
rtx x;
{
enum machine_mode inner_mode = GET_MODE (SUBREG_REG (x));
enum machine_mode mode = GET_MODE (x);
unsigned int bitpos;
unsigned int byte;
unsigned int word;
/* A paradoxical subreg begins at bit position 0. */
if (GET_MODE_BITSIZE (mode) > GET_MODE_BITSIZE (inner_mode))
return 0;
if (WORDS_BIG_ENDIAN != BYTES_BIG_ENDIAN)
/* If the subreg crosses a word boundary ensure that
it also begins and ends on a word boundary. */
if ((SUBREG_BYTE (x) % UNITS_PER_WORD
+ GET_MODE_SIZE (mode)) > UNITS_PER_WORD
&& (SUBREG_BYTE (x) % UNITS_PER_WORD
|| GET_MODE_SIZE (mode) % UNITS_PER_WORD))
abort ();
if (WORDS_BIG_ENDIAN)
word = (GET_MODE_SIZE (inner_mode)
- (SUBREG_BYTE (x) + GET_MODE_SIZE (mode))) / UNITS_PER_WORD;
else
word = SUBREG_BYTE (x) / UNITS_PER_WORD;
bitpos = word * BITS_PER_WORD;
if (BYTES_BIG_ENDIAN)
byte = (GET_MODE_SIZE (inner_mode)
- (SUBREG_BYTE (x) + GET_MODE_SIZE (mode))) % UNITS_PER_WORD;
else
byte = SUBREG_BYTE (x) % UNITS_PER_WORD;
bitpos += byte * BITS_PER_UNIT;
return bitpos;
}
/* This function returns the regno offset of a subreg expression.
xregno - A regno of an inner hard subreg_reg (or what will become one).
xmode - The mode of xregno.
offset - The byte offset.
ymode - The mode of a top level SUBREG (or what may become one).
RETURN - The regno offset which would be used. */
unsigned int
subreg_regno_offset (xregno, xmode, offset, ymode)
unsigned int xregno;
enum machine_mode xmode;
unsigned int offset;
enum machine_mode ymode;
{
int nregs_xmode, nregs_ymode;
int mode_multiple, nregs_multiple;
int y_offset;
if (xregno >= FIRST_PSEUDO_REGISTER)
abort ();
nregs_xmode = HARD_REGNO_NREGS (xregno, xmode);
nregs_ymode = HARD_REGNO_NREGS (xregno, ymode);
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/* If this is a big endian paradoxical subreg, which uses more actual
hard registers than the original register, we must return a negative
offset so that we find the proper highpart of the register. */
if (offset == 0
&& nregs_ymode > nregs_xmode
&& (GET_MODE_SIZE (ymode) > UNITS_PER_WORD
? WORDS_BIG_ENDIAN : BYTES_BIG_ENDIAN))
return nregs_xmode - nregs_ymode;
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if (offset == 0 || nregs_xmode == nregs_ymode)
return 0;
Gcc 3.3.1-pre as of 2003-07-11.
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/* size of ymode must not be greater than the size of xmode. */
mode_multiple = GET_MODE_SIZE (xmode) / GET_MODE_SIZE (ymode);
if (mode_multiple == 0)
abort ();
y_offset = offset / GET_MODE_SIZE (ymode);
nregs_multiple = nregs_xmode / nregs_ymode;
return (y_offset / (mode_multiple / nregs_multiple)) * nregs_ymode;
}
Gcc 3.3.1-pre as of 2003-07-11.
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/* This function returns true when the offset is representable via
subreg_offset in the given regno.
xregno - A regno of an inner hard subreg_reg (or what will become one).
xmode - The mode of xregno.
offset - The byte offset.
ymode - The mode of a top level SUBREG (or what may become one).
RETURN - The regno offset which would be used. */
bool
subreg_offset_representable_p (xregno, xmode, offset, ymode)
unsigned int xregno;
enum machine_mode xmode;
unsigned int offset;
enum machine_mode ymode;
{
int nregs_xmode, nregs_ymode;
int mode_multiple, nregs_multiple;
int y_offset;
if (xregno >= FIRST_PSEUDO_REGISTER)
abort ();
nregs_xmode = HARD_REGNO_NREGS (xregno, xmode);
nregs_ymode = HARD_REGNO_NREGS (xregno, ymode);
/* paradoxical subregs are always valid. */
if (offset == 0
&& nregs_ymode > nregs_xmode
&& (GET_MODE_SIZE (ymode) > UNITS_PER_WORD
? WORDS_BIG_ENDIAN : BYTES_BIG_ENDIAN))
return true;
/* Lowpart subregs are always valid. */
if (offset == subreg_lowpart_offset (ymode, xmode))
return true;
#ifdef ENABLE_CHECKING
/* This should always pass, otherwise we don't know how to verify the
constraint. These conditions may be relaxed but subreg_offset would
need to be redesigned. */
if (GET_MODE_SIZE (xmode) % GET_MODE_SIZE (ymode)
|| GET_MODE_SIZE (ymode) % nregs_ymode
|| nregs_xmode % nregs_ymode)
abort ();
#endif
/* The XMODE value can be seen as an vector of NREGS_XMODE
values. The subreg must represent an lowpart of given field.
Compute what field it is. */
offset -= subreg_lowpart_offset (ymode,
mode_for_size (GET_MODE_BITSIZE (xmode)
/ nregs_xmode,
MODE_INT, 0));
/* size of ymode must not be greater than the size of xmode. */
mode_multiple = GET_MODE_SIZE (xmode) / GET_MODE_SIZE (ymode);
if (mode_multiple == 0)
abort ();
y_offset = offset / GET_MODE_SIZE (ymode);
nregs_multiple = nregs_xmode / nregs_ymode;
#ifdef ENABLE_CHECKING
if (offset % GET_MODE_SIZE (ymode)
|| mode_multiple % nregs_multiple)
abort ();
#endif
return (!(y_offset % (mode_multiple / nregs_multiple)));
}
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/* Return the final regno that a subreg expression refers to. */
Gcc 3.3.1-pre as of 2003-07-11.
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unsigned int
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subreg_regno (x)
rtx x;
{
unsigned int ret;
rtx subreg = SUBREG_REG (x);
int regno = REGNO (subreg);
Gcc 3.3.1-pre as of 2003-07-11.
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ret = regno + subreg_regno_offset (regno,
GET_MODE (subreg),
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SUBREG_BYTE (x),
GET_MODE (x));
return ret;
}
struct parms_set_data
{
int nregs;
HARD_REG_SET regs;
};
/* Helper function for noticing stores to parameter registers. */
static void
parms_set (x, pat, data)
rtx x, pat ATTRIBUTE_UNUSED;
void *data;
{
struct parms_set_data *d = data;
if (REG_P (x) && REGNO (x) < FIRST_PSEUDO_REGISTER
&& TEST_HARD_REG_BIT (d->regs, REGNO (x)))
{
CLEAR_HARD_REG_BIT (d->regs, REGNO (x));
d->nregs--;
}
}
Gcc 3.3.1-pre as of 2003-07-11.
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/* Look backward for first parameter to be loaded.
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Do not skip BOUNDARY. */
rtx
find_first_parameter_load (call_insn, boundary)
rtx call_insn, boundary;
{
struct parms_set_data parm;
rtx p, before;
/* Since different machines initialize their parameter registers
in different orders, assume nothing. Collect the set of all
parameter registers. */
CLEAR_HARD_REG_SET (parm.regs);
parm.nregs = 0;
for (p = CALL_INSN_FUNCTION_USAGE (call_insn); p; p = XEXP (p, 1))
if (GET_CODE (XEXP (p, 0)) == USE
&& GET_CODE (XEXP (XEXP (p, 0), 0)) == REG)
{
if (REGNO (XEXP (XEXP (p, 0), 0)) >= FIRST_PSEUDO_REGISTER)
abort ();
/* We only care about registers which can hold function
arguments. */
if (!FUNCTION_ARG_REGNO_P (REGNO (XEXP (XEXP (p, 0), 0))))
continue;
SET_HARD_REG_BIT (parm.regs, REGNO (XEXP (XEXP (p, 0), 0)));
parm.nregs++;
}
before = call_insn;
/* Search backward for the first set of a register in this set. */
while (parm.nregs && before != boundary)
{
before = PREV_INSN (before);
/* It is possible that some loads got CSEed from one call to
another. Stop in that case. */
if (GET_CODE (before) == CALL_INSN)
break;
/* Our caller needs either ensure that we will find all sets
(in case code has not been optimized yet), or take care
for possible labels in a way by setting boundary to preceding
CODE_LABEL. */
if (GET_CODE (before) == CODE_LABEL)
{
if (before != boundary)
abort ();
break;
}
if (INSN_P (before))
Gcc 3.3.1-pre as of 2003-07-11.
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note_stores (PATTERN (before), parms_set, &parm);
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}
return before;
}
Gcc 3.3.1-pre as of 2003-07-11.
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/* Return true if we should avoid inserting code between INSN and preceeding
call instruction. */
bool
keep_with_call_p (insn)
rtx insn;
{
rtx set;
if (INSN_P (insn) && (set = single_set (insn)) != NULL)
{
if (GET_CODE (SET_DEST (set)) == REG
&& REGNO (SET_DEST (set)) < FIRST_PSEUDO_REGISTER
&& fixed_regs[REGNO (SET_DEST (set))]
&& general_operand (SET_SRC (set), VOIDmode))
return true;
if (GET_CODE (SET_SRC (set)) == REG
&& FUNCTION_VALUE_REGNO_P (REGNO (SET_SRC (set)))
&& GET_CODE (SET_DEST (set)) == REG
&& REGNO (SET_DEST (set)) >= FIRST_PSEUDO_REGISTER)
return true;
/* There may be a stack pop just after the call and before the store
of the return register. Search for the actual store when deciding
if we can break or not. */
if (SET_DEST (set) == stack_pointer_rtx)
{
rtx i2 = next_nonnote_insn (insn);
if (i2 && keep_with_call_p (i2))
return true;
}
}
return false;
}
/* Return true when store to register X can be hoisted to the place
with LIVE registers (can be NULL). Value VAL contains destination
whose value will be used. */
static bool
hoist_test_store (x, val, live)
rtx x, val;
regset live;
{
if (GET_CODE (x) == SCRATCH)
return true;
if (rtx_equal_p (x, val))
return true;
/* Allow subreg of X in case it is not writting just part of multireg pseudo.
Then we would need to update all users to care hoisting the store too.
Caller may represent that by specifying whole subreg as val. */
if (GET_CODE (x) == SUBREG && rtx_equal_p (SUBREG_REG (x), val))
{
if (GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))) > UNITS_PER_WORD
&& GET_MODE_BITSIZE (GET_MODE (x)) <
GET_MODE_BITSIZE (GET_MODE (SUBREG_REG (x))))
return false;
return true;
}
if (GET_CODE (x) == SUBREG)
x = SUBREG_REG (x);
/* Anything except register store is not hoistable. This includes the
partial stores to registers. */
if (!REG_P (x))
return false;
/* Pseudo registers can be allways replaced by another pseudo to avoid
the side effect, for hard register we must ensure that they are dead.
Eventually we may want to add code to try turn pseudos to hards, but it
is unlikely usefull. */
if (REGNO (x) < FIRST_PSEUDO_REGISTER)
{
int regno = REGNO (x);
int n = HARD_REGNO_NREGS (regno, GET_MODE (x));
if (!live)
return false;
if (REGNO_REG_SET_P (live, regno))
return false;
while (--n > 0)
if (REGNO_REG_SET_P (live, regno + n))
return false;
}
return true;
}
/* Return true if INSN can be hoisted to place with LIVE hard registers
(LIVE can be NULL when unknown). VAL is expected to be stored by the insn
and used by the hoisting pass. */
bool
can_hoist_insn_p (insn, val, live)
rtx insn, val;
regset live;
{
rtx pat = PATTERN (insn);
int i;
/* It probably does not worth the complexity to handle multiple
set stores. */
if (!single_set (insn))
return false;
/* We can move CALL_INSN, but we need to check that all caller clobbered
regs are dead. */
if (GET_CODE (insn) == CALL_INSN)
return false;
/* In future we will handle hoisting of libcall sequences, but
give up for now. */
if (find_reg_note (insn, REG_RETVAL, NULL_RTX))
return false;
switch (GET_CODE (pat))
{
case SET:
if (!hoist_test_store (SET_DEST (pat), val, live))
return false;
break;
case USE:
/* USES do have sick semantics, so do not move them. */
return false;
break;
case CLOBBER:
if (!hoist_test_store (XEXP (pat, 0), val, live))
return false;
break;
case PARALLEL:
for (i = 0; i < XVECLEN (pat, 0); i++)
{
rtx x = XVECEXP (pat, 0, i);
switch (GET_CODE (x))
{
case SET:
if (!hoist_test_store (SET_DEST (x), val, live))
return false;
break;
case USE:
/* We need to fix callers to really ensure availability
of all values inisn uses, but for now it is safe to prohibit
hoisting of any insn having such a hiden uses. */
return false;
break;
case CLOBBER:
if (!hoist_test_store (SET_DEST (x), val, live))
return false;
break;
default:
break;
}
}
break;
default:
abort ();
}
return true;
}
/* Update store after hoisting - replace all stores to pseudo registers
by new ones to avoid clobbering of values except for store to VAL that will
be updated to NEW. */
static void
hoist_update_store (insn, xp, val, new)
rtx insn, *xp, val, new;
{
rtx x = *xp;
if (GET_CODE (x) == SCRATCH)
return;
if (GET_CODE (x) == SUBREG && SUBREG_REG (x) == val)
validate_change (insn, xp,
simplify_gen_subreg (GET_MODE (x), new, GET_MODE (new),
SUBREG_BYTE (x)), 1);
if (rtx_equal_p (x, val))
{
validate_change (insn, xp, new, 1);
return;
}
if (GET_CODE (x) == SUBREG)
{
xp = &SUBREG_REG (x);
x = *xp;
}
if (!REG_P (x))
abort ();
/* We've verified that hard registers are dead, so we may keep the side
effect. Otherwise replace it by new pseudo. */
if (REGNO (x) >= FIRST_PSEUDO_REGISTER)
validate_change (insn, xp, gen_reg_rtx (GET_MODE (x)), 1);
REG_NOTES (insn)
= alloc_EXPR_LIST (REG_UNUSED, *xp, REG_NOTES (insn));
}
/* Create a copy of INSN after AFTER replacing store of VAL to NEW
and each other side effect to pseudo register by new pseudo register. */
rtx
hoist_insn_after (insn, after, val, new)
rtx insn, after, val, new;
{
rtx pat;
int i;
rtx note;
insn = emit_copy_of_insn_after (insn, after);
pat = PATTERN (insn);
/* Remove REG_UNUSED notes as we will re-emit them. */
while ((note = find_reg_note (insn, REG_UNUSED, NULL_RTX)))
remove_note (insn, note);
/* To get this working callers must ensure to move everything referenced
by REG_EQUAL/REG_EQUIV notes too. Lets remove them, it is probably
easier. */
while ((note = find_reg_note (insn, REG_EQUAL, NULL_RTX)))
remove_note (insn, note);
while ((note = find_reg_note (insn, REG_EQUIV, NULL_RTX)))
remove_note (insn, note);
/* Remove REG_DEAD notes as they might not be valid anymore in case
we create redundancy. */
while ((note = find_reg_note (insn, REG_DEAD, NULL_RTX)))
remove_note (insn, note);
switch (GET_CODE (pat))
{
case SET:
hoist_update_store (insn, &SET_DEST (pat), val, new);
break;
case USE:
break;
case CLOBBER:
hoist_update_store (insn, &XEXP (pat, 0), val, new);
break;
case PARALLEL:
for (i = 0; i < XVECLEN (pat, 0); i++)
{
rtx x = XVECEXP (pat, 0, i);
switch (GET_CODE (x))
{
case SET:
hoist_update_store (insn, &SET_DEST (x), val, new);
break;
case USE:
break;
case CLOBBER:
hoist_update_store (insn, &SET_DEST (x), val, new);
break;
default:
break;
}
}
break;
default:
abort ();
}
if (!apply_change_group ())
abort ();
return insn;
}
rtx
hoist_insn_to_edge (insn, e, val, new)
rtx insn, val, new;
edge e;
{
rtx new_insn;
/* We cannot insert instructions on an abnormal critical edge.
It will be easier to find the culprit if we die now. */
if ((e->flags & EDGE_ABNORMAL) && EDGE_CRITICAL_P (e))
abort ();
/* Do not use emit_insn_on_edge as we want to preserve notes and similar
stuff. We also emit CALL_INSNS and firends. */
if (e->insns == NULL_RTX)
{
start_sequence ();
emit_note (NULL, NOTE_INSN_DELETED);
}
else
push_to_sequence (e->insns);
new_insn = hoist_insn_after (insn, get_last_insn (), val, new);
e->insns = get_insns ();
end_sequence ();
return new_insn;
}
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