d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
39d9149396
freebsd-skq/contrib/gcc/rtlanal.c

4711 lines
127 KiB
C
Raw Normal View History

GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Analyze RTL for GNU 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,
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software
Foundation, Inc.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
This file is part of GCC.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
You should have received a copy of the GNU General Public License
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
along with GCC; see the file COPYING. If not, write to the Free
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
#include "config.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
#include "system.h"
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
#include "coretypes.h"
#include "tm.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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"
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
#include "target.h"
#include "output.h"
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
#include "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 "real.h"
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
#include "regs.h"
#include "function.h"
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* Forward declarations */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
static void set_of_1 (rtx, rtx, void *);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static bool covers_regno_p (rtx, unsigned int);
static bool covers_regno_no_parallel_p (rtx, unsigned int);
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
static int rtx_referenced_p_1 (rtx *, void *);
static int computed_jump_p_1 (rtx);
static void parms_set (rtx, rtx, void *);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static unsigned HOST_WIDE_INT cached_nonzero_bits (rtx, enum machine_mode,
rtx, enum machine_mode,
unsigned HOST_WIDE_INT);
static unsigned HOST_WIDE_INT nonzero_bits1 (rtx, enum machine_mode, rtx,
enum machine_mode,
unsigned HOST_WIDE_INT);
static unsigned int cached_num_sign_bit_copies (rtx, enum machine_mode, rtx,
enum machine_mode,
unsigned int);
static unsigned int num_sign_bit_copies1 (rtx, enum machine_mode, rtx,
enum machine_mode, unsigned int);
/* Offset of the first 'e', 'E' or 'V' operand for each rtx code, or
-1 if a code has no such operand. */
static int non_rtx_starting_operands[NUM_RTX_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
/* 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;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Truncation narrows the mode from SOURCE mode to DESTINATION mode.
If TARGET_MODE_REP_EXTENDED (DESTINATION, DESTINATION_REP) is
SIGN_EXTEND then while narrowing we also have to enforce the
representation and sign-extend the value to mode DESTINATION_REP.
If the value is already sign-extended to DESTINATION_REP mode we
can just switch to DESTINATION mode on it. For each pair of
integral modes SOURCE and DESTINATION, when truncating from SOURCE
to DESTINATION, NUM_SIGN_BIT_COPIES_IN_REP[SOURCE][DESTINATION]
contains the number of high-order bits in SOURCE that have to be
copies of the sign-bit so that we can do this mode-switch to
DESTINATION. */
static unsigned int
num_sign_bit_copies_in_rep[MAX_MODE_INT + 1][MAX_MODE_INT + 1];
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
rtx_unstable_p (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
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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return !MEM_READONLY_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 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. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
|| (x == arg_pointer_rtx && fixed_regs[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
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;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Fall through. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
rtx_varies_p (rtx x, 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
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
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
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (!x)
return 0;
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 MEM:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return !MEM_READONLY_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 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;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Fall through. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
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;
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Return nonzero if the use of X as an address in a MEM can cause a trap.
MODE is the mode of the MEM (not that of X) and UNALIGNED_MEMS controls
whether nonzero is returned for unaligned memory accesses on strict
alignment machines. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static int
rtx_addr_can_trap_p_1 (rtx x, enum machine_mode mode, bool unaligned_mems)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return rtx_addr_can_trap_p_1 (XEXP (x, 0), mode, unaligned_mems);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 PLUS:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* An address is assumed not to trap if:
- it is an address that can't trap plus a constant integer,
with the proper remainder modulo the mode size if we are
considering unaligned memory references. */
if (!rtx_addr_can_trap_p_1 (XEXP (x, 0), mode, unaligned_mems)
&& GET_CODE (XEXP (x, 1)) == CONST_INT)
{
HOST_WIDE_INT offset;
if (!STRICT_ALIGNMENT
|| !unaligned_mems
|| GET_MODE_SIZE (mode) == 0)
return 0;
offset = INTVAL (XEXP (x, 1));
#ifdef SPARC_STACK_BOUNDARY_HACK
/* ??? The SPARC port may claim a STACK_BOUNDARY higher than
the real alignment of %sp. However, when it does this, the
alignment of %sp+STACK_POINTER_OFFSET is STACK_BOUNDARY. */
if (SPARC_STACK_BOUNDARY_HACK
&& (XEXP (x, 0) == stack_pointer_rtx
|| XEXP (x, 0) == hard_frame_pointer_rtx))
offset -= STACK_POINTER_OFFSET;
#endif
return offset % GET_MODE_SIZE (mode) != 0;
}
/* - or it is the pic register plus a constant. */
if (XEXP (x, 0) == pic_offset_table_rtx && CONSTANT_P (XEXP (x, 1)))
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:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return rtx_addr_can_trap_p_1 (XEXP (x, 1), mode, unaligned_mems);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return rtx_addr_can_trap_p_1 (XEXP (x, 0), mode, unaligned_mems);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
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 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Return nonzero if the use of X as an address in a MEM can cause a trap. */
int
rtx_addr_can_trap_p (rtx x)
{
return rtx_addr_can_trap_p_1 (x, VOIDmode, false);
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Return true if X is an address that is known to not be zero. */
bool
nonzero_address_p (rtx x)
{
enum rtx_code code = GET_CODE (x);
switch (code)
{
case SYMBOL_REF:
return !SYMBOL_REF_WEAK (x);
case LABEL_REF:
return true;
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
|| x == stack_pointer_rtx
|| (x == arg_pointer_rtx && fixed_regs[ARG_POINTER_REGNUM]))
return true;
/* All of the virtual frame registers are stack references. */
if (REGNO (x) >= FIRST_VIRTUAL_REGISTER
&& REGNO (x) <= LAST_VIRTUAL_REGISTER)
return true;
return false;
case CONST:
return nonzero_address_p (XEXP (x, 0));
case PLUS:
if (GET_CODE (XEXP (x, 1)) == CONST_INT)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return nonzero_address_p (XEXP (x, 0));
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Handle PIC references. */
else if (XEXP (x, 0) == pic_offset_table_rtx
&& CONSTANT_P (XEXP (x, 1)))
return true;
return false;
case PRE_MODIFY:
/* Similar to the above; allow positive offsets. Further, since
auto-inc is only allowed in memories, the register must be a
pointer. */
if (GET_CODE (XEXP (x, 1)) == CONST_INT
&& INTVAL (XEXP (x, 1)) > 0)
return true;
return nonzero_address_p (XEXP (x, 0));
case PRE_INC:
/* Similarly. Further, the offset is always positive. */
return true;
case PRE_DEC:
case POST_DEC:
case POST_INC:
case POST_MODIFY:
return nonzero_address_p (XEXP (x, 0));
case LO_SUM:
return nonzero_address_p (XEXP (x, 1));
default:
break;
}
/* If it isn't one of the case above, might be zero. */
return false;
}
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
rtx_addr_varies_p (rtx x, 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
get_integer_term (rtx x)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
if (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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
get_related_value (rtx x)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
if (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
/* 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
count_occurrences (rtx x, rtx find, int count_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
{
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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_P (find) && rtx_equal_p (x, find))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
reg_mentioned_p (rtx reg, rtx 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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return REG_P (reg) && REGNO (in) == REGNO (reg);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* These codes have no constituent expressions
and are unique. */
case SCRATCH:
case CC0:
case PC:
return 0;
case CONST_INT:
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
no_labels_between_p (rtx beg, rtx end)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (LABEL_P (p))
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
reg_used_between_p (rtx reg, rtx from_insn, rtx to_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
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))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
|| (CALL_P (insn) && find_reg_fusage (insn, USE, reg))))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
reg_referenced_p (rtx x, rtx 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
{
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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& !REG_P (SET_DEST (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
&& ! (GET_CODE (SET_DEST (body)) == SUBREG
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (SUBREG_REG (SET_DEST (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
&& (((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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_P (XEXP (body, 0)))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (reg_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 set or clobbered in an insn between
FROM_INSN and TO_INSN (exclusive of those two). */
int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
reg_set_between_p (rtx reg, rtx from_insn, rtx to_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
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
reg_set_p (rtx reg, 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
{
/* 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. */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (INSN_P (insn)
&& (FIND_REG_INC_NOTE (insn, reg)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
|| (CALL_P (insn)
&& ((REG_P (reg)
&& REGNO (reg) < FIRST_PSEUDO_REGISTER
&& TEST_HARD_REG_BIT (regs_invalidated_by_call,
REGNO (reg)))
|| MEM_P (reg)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
|| find_reg_fusage (insn, CLOBBER, reg)))))
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 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
}
/* 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
X contains a MEM; this routine does usememory aliasing. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
modified_between_p (rtx x, rtx start, rtx end)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
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;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
rtx insn;
if (start == 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
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:
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (modified_between_p (XEXP (x, 0), start, end))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
return 1;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_READONLY_P (x))
return 0;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
for (insn = NEXT_INSN (start); insn != end; insn = NEXT_INSN (insn))
if (memory_modified_in_insn_p (x, insn))
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
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
does use memory aliasing. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
modified_in_p (rtx x, 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
{
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:
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (modified_in_p (XEXP (x, 0), insn))
return 1;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_READONLY_P (x))
return 0;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (memory_modified_in_insn_p (x, 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;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +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
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
/* Helper function for set_of. */
struct set_of_data
{
rtx found;
rtx pat;
};
static void
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
set_of_1 (rtx x, rtx pat, void *data1)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
struct set_of_data *data = (struct set_of_data *) (data1);
if (rtx_equal_p (x, data->pat)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
|| (!MEM_P (x) && reg_overlap_mentioned_p (data->pat, 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
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
set_of (rtx pat, 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
{
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
single_set_2 (rtx insn, rtx 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
multiple_sets (rtx insn)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
set_noop_p (rtx set)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
rtx src = SET_SRC (set);
rtx dst = SET_DEST (set);
if (dst == pc_rtx && src == pc_rtx)
return 1;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_P (dst) && MEM_P (src))
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
return rtx_equal_p (dst, src) && !side_effects_p (dst);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (GET_CODE (dst) == ZERO_EXTRACT)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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_equal_p (XEXP (dst, 0), src)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
&& ! BYTES_BIG_ENDIAN && XEXP (dst, 2) == const0_rtx
&& !side_effects_p (src);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (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);
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return (REG_P (src) && REG_P (dst)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (src) == REGNO (dst));
}
/* Return nonzero if an insn consists only of SETs, each of which only sets a
value to itself. */
int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
noop_move_p (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
{
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_last_value (rtx x, rtx *pinsn, rtx valid_to, 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;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
for (p = PREV_INSN (*pinsn); p && !LABEL_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
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. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& (! (REG_P (src)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
&& 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
refers_to_regno_p (unsigned int regno, unsigned int endregno, rtx x,
rtx *loc)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
int i;
unsigned 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +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. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (SUBREG_REG (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
&& 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
? hard_regno_nregs[inner_regno][GET_MODE (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
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))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (SUBREG_REG (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
&& REGNO (SUBREG_REG (SET_DEST (x))) >= FIRST_PSEUDO_REGISTER
&& refers_to_regno_p (regno, endregno,
SUBREG_REG (SET_DEST (x)), loc))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
|| (!REG_P (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
&& 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;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
for (j = XVECLEN (x, i) - 1; j >= 0; j--)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
reg_overlap_mentioned_p (rtx x, rtx 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
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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* If either argument is a constant, then modifying X can not
affect IN. Here we look at IN, we can profitably combine
CONSTANT_P (x) with the switch statement below. */
if (CONSTANT_P (in))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +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 4.2.0 release.
2007-05-19 01:19:51 +00:00
recurse:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
case STRICT_LOW_PART:
case ZERO_EXTRACT:
case SIGN_EXTRACT:
/* Overly conservative. */
x = XEXP (x, 0);
goto recurse;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
? hard_regno_nregs[regno][GET_MODE (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
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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_P (in))
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--)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (fmt[i] == 'e')
{
if (reg_overlap_mentioned_p (x, XEXP (in, i)))
return 1;
}
else if (fmt[i] == 'E')
{
int j;
for (j = XVECLEN (in, i) - 1; j >= 0; --j)
if (reg_overlap_mentioned_p (x, XVECEXP (in, 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
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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))
GCC 4.2.0 release.
2007-05-19 01:19:51 +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
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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (CONSTANT_P (x));
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
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 4.2.0 release.
2007-05-19 01:19:51 +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.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
If 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
note_stores (rtx x, void (*fun) (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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& (!REG_P (SUBREG_REG (dest))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
|| REGNO (SUBREG_REG (dest)) >= FIRST_PSEUDO_REGISTER))
|| GET_CODE (dest) == ZERO_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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
note_uses (rtx *pbody, void (*fun) (rtx *, void *), void *data)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 = *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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_P (XEXP (body, 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
(*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);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (MEM_P (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
(*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.
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
"Entirely set" means set directly and not through a SUBREG, or
ZERO_EXTRACT, so no trace of the old contents remains.
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
dead_or_set_p (rtx insn, 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
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;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (REG_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
regno = REGNO (x);
last_regno = (regno >= FIRST_PSEUDO_REGISTER ? regno
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
: regno + hard_regno_nregs[regno][GET_MODE (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
for (i = regno; i <= last_regno; i++)
if (! dead_or_set_regno_p (insn, i))
return 0;
return 1;
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Return TRUE iff DEST is a register or subreg of a register and
doesn't change the number of words of the inner register, and any
part of the register is TEST_REGNO. */
static bool
covers_regno_no_parallel_p (rtx dest, unsigned int test_regno)
{
unsigned int regno, endregno;
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 (!REG_P (dest))
return false;
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);
}
/* Like covers_regno_no_parallel_p, but also handles PARALLELs where
any member matches the covers_regno_no_parallel_p criteria. */
static bool
covers_regno_p (rtx dest, unsigned int test_regno)
{
if (GET_CODE (dest) == PARALLEL)
{
/* Some targets place small structures in registers for return
values of functions, and those registers are wrapped in
PARALLELs that we may see as the destination of a SET. */
int i;
for (i = XVECLEN (dest, 0) - 1; i >= 0; i--)
{
rtx inner = XEXP (XVECEXP (dest, 0, i), 0);
if (inner != NULL_RTX
&& covers_regno_no_parallel_p (inner, test_regno))
return true;
}
return false;
}
else
return covers_regno_no_parallel_p (dest, 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
/* Utility function for dead_or_set_p to check an individual register. Also
called from flow.c. */
int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
dead_or_set_regno_p (rtx insn, 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
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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (CALL_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
&& 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)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return covers_regno_p (SET_DEST (pattern), test_regno);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if ((GET_CODE (body) == SET || GET_CODE (body) == CLOBBER)
&& covers_regno_p (SET_DEST (body), 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
}
}
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_reg_note (rtx insn, enum reg_note kind, rtx 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
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (insn);
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;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (datum == 0)
{
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == kind)
return link;
return 0;
}
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_NOTE_KIND (link) == kind && datum == XEXP (link, 0))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_regno_note (rtx insn, enum reg_note kind, 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. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (XEXP (link, 0))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
&& REGNO (XEXP (link, 0)) <= regno
&& ((REGNO (XEXP (link, 0))
+ (REGNO (XEXP (link, 0)) >= FIRST_PSEUDO_REGISTER ? 1
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
: hard_regno_nregs[REGNO (XEXP (link, 0))]
[GET_MODE (XEXP (link, 0))]))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
> 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_reg_equal_equiv_note (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
{
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
rtx link;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
if (!INSN_P (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 0;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
if (REG_NOTE_KIND (link) == REG_EQUAL
|| REG_NOTE_KIND (link) == REG_EQUIV)
{
if (single_set (insn) == 0)
return 0;
return link;
}
return 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
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_reg_fusage (rtx insn, enum rtx_code code, rtx 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
{
/* If it's not a CALL_INSN, it can't possibly have a
CALL_INSN_FUNCTION_USAGE field, so don't bother checking. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!CALL_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
return 0;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!REG_P (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
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
= regno + hard_regno_nregs[regno][GET_MODE (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
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_regno_fusage (rtx insn, enum rtx_code code, 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
|| !CALL_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
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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (reg = XEXP (op, 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
&& (regnote = REGNO (reg)) <= regno
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& regnote + hard_regno_nregs[regnote][GET_MODE (reg)] > regno)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
return 1;
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
pure_call_p (rtx insn)
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
{
rtx link;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!CALL_P (insn) || ! CONST_OR_PURE_CALL_P (insn))
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 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& MEM_P (m = XEXP (u, 0)) && GET_MODE (m) == BLKmode
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
&& 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
remove_note (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;
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_unreachable ();
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
in_expr_list_p (rtx listp, rtx node)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
remove_node_from_expr_list (rtx node, rtx *listp)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
volatile_insn_p (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
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
volatile_refs_p (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
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
side_effects_p (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
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;
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
enum may_trap_p_flags
{
MTP_UNALIGNED_MEMS = 1,
MTP_AFTER_MOVE = 2
};
/* Return nonzero if evaluating rtx X might cause a trap.
(FLAGS & MTP_UNALIGNED_MEMS) controls whether nonzero is returned for
unaligned memory accesses on strict alignment machines. If
(FLAGS & AFTER_MOVE) is true, returns nonzero even in case the expression
cannot trap at its current location, but it might become trapping if moved
elsewhere. */
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static int
may_trap_p_1 (rtx x, unsigned flags)
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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;
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;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
bool unaligned_mems = (flags & MTP_UNALIGNED_MEMS) != 0;
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
if (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 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (/* MEM_NOTRAP_P only relates to the actual position of the memory
reference; moving it out of condition might cause its address
become invalid. */
!(flags & MTP_AFTER_MOVE)
&& MEM_NOTRAP_P (x)
&& (!STRICT_ALIGNMENT || !unaligned_mems))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
return 0;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return
rtx_addr_can_trap_p_1 (XEXP (x, 0), GET_MODE (x), unaligned_mems);
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
/* 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;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (SCALAR_FLOAT_MODE_P (GET_MODE (x)))
return flag_trapping_math;
if (!CONSTANT_P (XEXP (x, 1)) || (XEXP (x, 1) == const0_rtx))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
1996-09-18 05:35:50 +00:00
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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
case LTGT:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 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:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
case SUBREG:
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* 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 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (SCALAR_FLOAT_MODE_P (GET_MODE (x))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
&& 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')
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (may_trap_p_1 (XEXP (x, i), flags))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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;
}
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++)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (may_trap_p_1 (XVECEXP (x, i, j), flags))
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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;
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Return nonzero if evaluating rtx X might cause a trap. */
int
may_trap_p (rtx x)
{
return may_trap_p_1 (x, 0);
}
/* Return nonzero if evaluating rtx X might cause a trap, when the expression
is moved from its current location by some optimization. */
int
may_trap_after_code_motion_p (rtx x)
{
return may_trap_p_1 (x, MTP_AFTER_MOVE);
}
/* Same as above, but additionally return nonzero if evaluating rtx X might
cause a fault. We define a fault for the purpose of this function as a
erroneous execution condition that cannot be encountered during the normal
execution of a valid program; the typical example is an unaligned memory
access on a strict alignment machine. The compiler guarantees that it
doesn't generate code that will fault from a valid program, but this
guarantee doesn't mean anything for individual instructions. Consider
the following example:
struct S { int d; union { char *cp; int *ip; }; };
int foo(struct S *s)
{
if (s->d == 1)
return *s->ip;
else
return *s->cp;
}
on a strict alignment machine. In a valid program, foo will never be
invoked on a structure for which d is equal to 1 and the underlying
unique field of the union not aligned on a 4-byte boundary, but the
expression *s->ip might cause a fault if considered individually.
At the RTL level, potentially problematic expressions will almost always
verify may_trap_p; for example, the above dereference can be emitted as
(mem:SI (reg:P)) and this expression is may_trap_p for a generic register.
However, suppose that foo is inlined in a caller that causes s->cp to
point to a local character variable and guarantees that s->d is not set
to 1; foo may have been effectively translated into pseudo-RTL as:
if ((reg:SI) == 1)
(set (reg:SI) (mem:SI (%fp - 7)))
else
(set (reg:QI) (mem:QI (%fp - 7)))
Now (mem:SI (%fp - 7)) is considered as not may_trap_p since it is a
memory reference to a stack slot, but it will certainly cause a fault
on a strict alignment machine. */
int
may_trap_or_fault_p (rtx x)
{
return may_trap_p_1 (x, MTP_UNALIGNED_MEMS);
}
Import of unmodified (but trimmed) gcc-2.7.2. The bigger parts of the non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be 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 contains a comparison that is not either EQ or NE,
i.e., an inequality. */
int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
inequality_comparisons_p (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
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
replace_rtx (rtx x, rtx from, rtx 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
{
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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));
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (x);
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
}
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)));
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (x);
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
}
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Replace occurrences of the old label in *X with the new one.
DATA is a REPLACE_LABEL_DATA containing the old and new labels. */
int
replace_label (rtx *x, void *data)
{
rtx l = *x;
rtx old_label = ((replace_label_data *) data)->r1;
rtx new_label = ((replace_label_data *) data)->r2;
bool update_label_nuses = ((replace_label_data *) data)->update_label_nuses;
if (l == NULL_RTX)
return 0;
if (GET_CODE (l) == SYMBOL_REF
&& CONSTANT_POOL_ADDRESS_P (l))
{
rtx c = get_pool_constant (l);
if (rtx_referenced_p (old_label, c))
{
rtx new_c, new_l;
replace_label_data *d = (replace_label_data *) data;
/* Create a copy of constant C; replace the label inside
but do not update LABEL_NUSES because uses in constant pool
are not counted. */
new_c = copy_rtx (c);
d->update_label_nuses = false;
for_each_rtx (&new_c, replace_label, data);
d->update_label_nuses = update_label_nuses;
/* Add the new constant NEW_C to constant pool and replace
the old reference to constant by new reference. */
new_l = XEXP (force_const_mem (get_pool_mode (l), new_c), 0);
*x = replace_rtx (l, l, new_l);
}
return 0;
}
/* If this is a JUMP_INSN, then we also need to fix the JUMP_LABEL
field. This is not handled by for_each_rtx because it doesn't
handle unprinted ('0') fields. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (JUMP_P (l) && JUMP_LABEL (l) == old_label)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
JUMP_LABEL (l) = new_label;
if ((GET_CODE (l) == LABEL_REF
|| GET_CODE (l) == INSN_LIST)
&& XEXP (l, 0) == old_label)
{
XEXP (l, 0) = new_label;
if (update_label_nuses)
{
++LABEL_NUSES (new_label);
--LABEL_NUSES (old_label);
}
return 0;
}
return 0;
}
/* When *BODY is equal to X or X is directly referenced by *BODY
return nonzero, thus FOR_EACH_RTX stops traversing and returns nonzero
too, otherwise FOR_EACH_RTX continues traversing *BODY. */
static int
rtx_referenced_p_1 (rtx *body, void *x)
{
rtx y = (rtx) x;
if (*body == NULL_RTX)
return y == NULL_RTX;
/* Return true if a label_ref *BODY refers to label Y. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (GET_CODE (*body) == LABEL_REF && LABEL_P (y))
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
return XEXP (*body, 0) == y;
/* If *BODY is a reference to pool constant traverse the constant. */
if (GET_CODE (*body) == SYMBOL_REF
&& CONSTANT_POOL_ADDRESS_P (*body))
return rtx_referenced_p (y, get_pool_constant (*body));
/* By default, compare the RTL expressions. */
return rtx_equal_p (*body, y);
}
/* Return true if X is referenced in BODY. */
int
rtx_referenced_p (rtx x, rtx body)
{
return for_each_rtx (&body, rtx_referenced_p_1, x);
}
/* If INSN is a tablejump return true and store the label (before jump table) to
*LABELP and the jump table to *TABLEP. LABELP and TABLEP may be NULL. */
bool
tablejump_p (rtx insn, rtx *labelp, rtx *tablep)
{
rtx label, table;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (JUMP_P (insn)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
&& (label = JUMP_LABEL (insn)) != NULL_RTX
&& (table = next_active_insn (label)) != NULL_RTX
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& JUMP_P (table)
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
&& (GET_CODE (PATTERN (table)) == ADDR_VEC
|| GET_CODE (PATTERN (table)) == ADDR_DIFF_VEC))
{
if (labelp)
*labelp = label;
if (tablep)
*tablep = table;
return true;
}
return false;
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
computed_jump_p_1 (rtx x)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
computed_jump_p (rtx insn)
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
int i;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (JUMP_P (insn))
Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
{
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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Optimized loop of for_each_rtx, trying to avoid useless recursive
calls. Processes the subexpressions of EXP and passes them to F. */
static int
for_each_rtx_1 (rtx exp, int n, rtx_function f, void *data)
{
int result, i, j;
const char *format = GET_RTX_FORMAT (GET_CODE (exp));
rtx *x;
for (; format[n] != '\0'; n++)
{
switch (format[n])
{
case 'e':
/* Call F on X. */
x = &XEXP (exp, n);
result = (*f) (x, data);
if (result == -1)
/* Do not traverse sub-expressions. */
continue;
else if (result != 0)
/* Stop the traversal. */
return result;
if (*x == NULL_RTX)
/* There are no sub-expressions. */
continue;
i = non_rtx_starting_operands[GET_CODE (*x)];
if (i >= 0)
{
result = for_each_rtx_1 (*x, i, f, data);
if (result != 0)
return result;
}
break;
case 'V':
case 'E':
if (XVEC (exp, n) == 0)
continue;
for (j = 0; j < XVECLEN (exp, n); ++j)
{
/* Call F on X. */
x = &XVECEXP (exp, n, j);
result = (*f) (x, data);
if (result == -1)
/* Do not traverse sub-expressions. */
continue;
else if (result != 0)
/* Stop the traversal. */
return result;
if (*x == NULL_RTX)
/* There are no sub-expressions. */
continue;
i = non_rtx_starting_operands[GET_CODE (*x)];
if (i >= 0)
{
result = for_each_rtx_1 (*x, i, f, data);
if (result != 0)
return result;
}
}
break;
default:
/* Nothing to do. */
break;
}
}
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
for_each_rtx (rtx *x, rtx_function f, void *data)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
int result;
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;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
i = non_rtx_starting_operands[GET_CODE (*x)];
if (i < 0)
return 0;
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return for_each_rtx_1 (*x, i, f, data);
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
/* Searches X for any reference to REGNO, returning the rtx of the
reference found if any. Otherwise, returns NULL_RTX. */
rtx
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
regno_use_in (unsigned int regno, rtx x)
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
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;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (x) && REGNO (x) == regno)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
commutative_operand_precedence (rtx op)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
enum rtx_code code = GET_CODE (op);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* Constants always come the second operand. Prefer "nice" constants. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (code == CONST_INT)
return -7;
if (code == CONST_DOUBLE)
return -6;
op = avoid_constant_pool_reference (op);
code = GET_CODE (op);
switch (GET_RTX_CLASS (code))
{
case RTX_CONST_OBJ:
if (code == CONST_INT)
return -5;
if (code == CONST_DOUBLE)
return -4;
return -3;
case RTX_EXTRA:
/* SUBREGs of objects should come second. */
if (code == SUBREG && OBJECT_P (SUBREG_REG (op)))
return -2;
if (!CONSTANT_P (op))
return 0;
else
/* As for RTX_CONST_OBJ. */
return -3;
case RTX_OBJ:
/* Complex expressions should be the first, so decrease priority
of objects. */
return -1;
case RTX_COMM_ARITH:
/* Prefer operands that are themselves commutative to be first.
This helps to make things linear. In particular,
(and (and (reg) (reg)) (not (reg))) is canonical. */
return 4;
case RTX_BIN_ARITH:
/* If only one operand is a binary expression, it will be the first
operand. In particular, (plus (minus (reg) (reg)) (neg (reg)))
is canonical, although it will usually be further simplified. */
return 2;
case RTX_UNARY:
/* Then prefer NEG and NOT. */
if (code == NEG || code == NOT)
return 1;
default:
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 1 iff it is necessary to swap operands of commutative operation
in order to canonicalize expression. */
int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
swap_commutative_operands_p (rtx x, rtx y)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
auto_inc_p (rtx x)
Virgin import of the GCC 2.95.1 compilers
1999-10-16 06:09:09 +00:00
{
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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Return nonzero if IN contains a piece of rtl that has the address LOC. */
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
int
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
loc_mentioned_in_p (rtx *loc, rtx in)
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
enum rtx_code code = GET_CODE (in);
const char *fmt = GET_RTX_FORMAT (code);
int i, j;
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (loc == &in->u.fld[i].rt_rtx)
return 1;
if (fmt[i] == 'e')
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
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;
}
Enlist the FreeBSD-CURRENT users as testers of GCC 2.95.3 Release Candidate #1
2001-01-03 17:16:04 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Helper function for subreg_lsb. Given a subreg's OUTER_MODE, INNER_MODE,
and SUBREG_BYTE, return the bit offset where the subreg begins
(counting from the least significant bit of the operand). */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
subreg_lsb_1 (enum machine_mode outer_mode,
enum machine_mode inner_mode,
unsigned int subreg_byte)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 bitpos;
unsigned int byte;
unsigned int word;
/* A paradoxical subreg begins at bit position 0. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (GET_MODE_BITSIZE (outer_mode) > GET_MODE_BITSIZE (inner_mode))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
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. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (!((subreg_byte % UNITS_PER_WORD
+ GET_MODE_SIZE (outer_mode)) > UNITS_PER_WORD
&& (subreg_byte % UNITS_PER_WORD
|| GET_MODE_SIZE (outer_mode) % UNITS_PER_WORD)));
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
if (WORDS_BIG_ENDIAN)
word = (GET_MODE_SIZE (inner_mode)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
- (subreg_byte + GET_MODE_SIZE (outer_mode))) / UNITS_PER_WORD;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
word = subreg_byte / UNITS_PER_WORD;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
bitpos = word * BITS_PER_WORD;
if (BYTES_BIG_ENDIAN)
byte = (GET_MODE_SIZE (inner_mode)
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
- (subreg_byte + GET_MODE_SIZE (outer_mode))) % UNITS_PER_WORD;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
else
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
byte = subreg_byte % UNITS_PER_WORD;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
bitpos += byte * BITS_PER_UNIT;
return bitpos;
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* 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 (rtx x)
{
return subreg_lsb_1 (GET_MODE (x), GET_MODE (SUBREG_REG (x)),
SUBREG_BYTE (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
/* 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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
subreg_regno_offset (unsigned int xregno, enum machine_mode xmode,
unsigned int offset, enum machine_mode ymode)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 nregs_xmode, nregs_ymode;
int mode_multiple, nregs_multiple;
int y_offset;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (xregno < 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Adjust nregs_xmode to allow for 'holes'. */
if (HARD_REGNO_NREGS_HAS_PADDING (xregno, xmode))
nregs_xmode = HARD_REGNO_NREGS_WITH_PADDING (xregno, xmode);
else
nregs_xmode = hard_regno_nregs[xregno][xmode];
nregs_ymode = hard_regno_nregs[xregno][ymode];
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
/* 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;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 (offset == 0 || nregs_xmode == nregs_ymode)
return 0;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Size of ymode must not be greater than the size of xmode. */
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
mode_multiple = GET_MODE_SIZE (xmode) / GET_MODE_SIZE (ymode);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (mode_multiple != 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
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.
2003-07-11 03:40:53 +00:00
/* 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).
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
RETURN - Whether the offset is representable. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
bool
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
subreg_offset_representable_p (unsigned int xregno, enum machine_mode xmode,
unsigned int offset, enum machine_mode ymode)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
int nregs_xmode, nregs_ymode;
int mode_multiple, nregs_multiple;
int y_offset;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int regsize_xmode, regsize_ymode;
gcc_assert (xregno < FIRST_PSEUDO_REGISTER);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* If there are holes in a non-scalar mode in registers, we expect
that it is made up of its units concatenated together. */
if (HARD_REGNO_NREGS_HAS_PADDING (xregno, xmode))
{
enum machine_mode xmode_unit;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
nregs_xmode = HARD_REGNO_NREGS_WITH_PADDING (xregno, xmode);
if (GET_MODE_INNER (xmode) == VOIDmode)
xmode_unit = xmode;
else
xmode_unit = GET_MODE_INNER (xmode);
gcc_assert (HARD_REGNO_NREGS_HAS_PADDING (xregno, xmode_unit));
gcc_assert (nregs_xmode
== (GET_MODE_NUNITS (xmode)
* HARD_REGNO_NREGS_WITH_PADDING (xregno, xmode_unit)));
gcc_assert (hard_regno_nregs[xregno][xmode]
== (hard_regno_nregs[xregno][xmode_unit]
* GET_MODE_NUNITS (xmode)));
/* You can only ask for a SUBREG of a value with holes in the middle
if you don't cross the holes. (Such a SUBREG should be done by
picking a different register class, or doing it in memory if
necessary.) An example of a value with holes is XCmode on 32-bit
x86 with -m128bit-long-double; it's represented in 6 32-bit registers,
3 for each part, but in memory it's two 128-bit parts.
Padding is assumed to be at the end (not necessarily the 'high part')
of each unit. */
if ((offset / GET_MODE_SIZE (xmode_unit) + 1
< GET_MODE_NUNITS (xmode))
&& (offset / GET_MODE_SIZE (xmode_unit)
!= ((offset + GET_MODE_SIZE (ymode) - 1)
/ GET_MODE_SIZE (xmode_unit))))
return false;
}
else
nregs_xmode = hard_regno_nregs[xregno][xmode];
nregs_ymode = hard_regno_nregs[xregno][ymode];
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Paradoxical subregs are otherwise valid. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (offset == 0
&& nregs_ymode > nregs_xmode
&& (GET_MODE_SIZE (ymode) > UNITS_PER_WORD
? WORDS_BIG_ENDIAN : BYTES_BIG_ENDIAN))
return true;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* If registers store different numbers of bits in the different
modes, we cannot generally form this subreg. */
regsize_xmode = GET_MODE_SIZE (xmode) / nregs_xmode;
regsize_ymode = GET_MODE_SIZE (ymode) / nregs_ymode;
if (regsize_xmode > regsize_ymode && nregs_ymode > 1)
return false;
if (regsize_ymode > regsize_xmode && nregs_xmode > 1)
return false;
/* Lowpart subregs are otherwise valid. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
if (offset == subreg_lowpart_offset (ymode, xmode))
return true;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* This should always pass, otherwise we don't know how to verify
the constraint. These conditions may be relaxed but
subreg_regno_offset would need to be redesigned. */
gcc_assert ((GET_MODE_SIZE (xmode) % GET_MODE_SIZE (ymode)) == 0);
gcc_assert ((nregs_xmode % nregs_ymode) == 0);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* The XMODE value can be seen as a vector of NREGS_XMODE
values. The subreg must represent a lowpart of given field.
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
Compute what field it is. */
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
offset -= subreg_lowpart_offset (ymode,
mode_for_size (GET_MODE_BITSIZE (xmode)
/ nregs_xmode,
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
MODE_INT, 0));
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Size of ymode must not be greater than the size of xmode. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
mode_multiple = GET_MODE_SIZE (xmode) / GET_MODE_SIZE (ymode);
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (mode_multiple != 0);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
y_offset = offset / GET_MODE_SIZE (ymode);
nregs_multiple = nregs_xmode / nregs_ymode;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert ((offset % GET_MODE_SIZE (ymode)) == 0);
gcc_assert ((mode_multiple % nregs_multiple) == 0);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
return (!(y_offset % (mode_multiple / nregs_multiple)));
}
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. 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 final regno that a subreg expression refers to. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
unsigned int
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
subreg_regno (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 ret;
rtx subreg = SUBREG_REG (x);
int regno = REGNO (subreg);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
ret = regno + subreg_regno_offset (regno,
GET_MODE (subreg),
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
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
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
parms_set (rtx x, rtx pat ATTRIBUTE_UNUSED, void *data)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
struct 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.
2003-07-11 03:40:53 +00:00
/* Look backward for first parameter to be loaded.
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
Note that loads of all parameters will not necessarily be
found if CSE has eliminated some of them (e.g., an argument
to the outer function is passed down as a parameter).
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
Do not skip BOUNDARY. */
rtx
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
find_first_parameter_load (rtx call_insn, rtx boundary)
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
struct parms_set_data parm;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
rtx p, before, first_set;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
/* 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
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (XEXP (XEXP (p, 0), 0)))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (REGNO (XEXP (XEXP (p, 0), 0)) < 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
/* 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;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
first_set = 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
/* 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. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (CALL_P (before))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
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. */
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (LABEL_P (before))
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
gcc_assert (before == boundary);
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
break;
}
if (INSN_P (before))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
{
int nregs_old = parm.nregs;
note_stores (PATTERN (before), parms_set, &parm);
/* If we found something that did not set a parameter reg,
we're done. Do not keep going, as that might result
in hoisting an insn before the setting of a pseudo
that is used by the hoisted insn. */
if (nregs_old != parm.nregs)
first_set = before;
else
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
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return first_set;
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0. These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
/* Return true if we should avoid inserting code between INSN and preceding
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
call instruction. */
bool
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
keep_with_call_p (rtx insn)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
rtx set;
if (INSN_P (insn) && (set = single_set (insn)) != NULL)
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (SET_DEST (set))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
&& REGNO (SET_DEST (set)) < FIRST_PSEUDO_REGISTER
&& fixed_regs[REGNO (SET_DEST (set))]
&& general_operand (SET_SRC (set), VOIDmode))
return true;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (REG_P (SET_SRC (set))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
&& FUNCTION_VALUE_REGNO_P (REGNO (SET_SRC (set)))
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
&& REG_P (SET_DEST (set))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
&& 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;
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Return true if LABEL is a target of JUMP_INSN. This applies only
to non-complex jumps. That is, direct unconditional, conditional,
and tablejumps, but not computed jumps or returns. It also does
not apply to the fallthru case of a conditional jump. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
bool
label_is_jump_target_p (rtx label, rtx jump_insn)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
rtx tmp = JUMP_LABEL (jump_insn);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (label == tmp)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
return true;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (tablejump_p (jump_insn, NULL, &tmp))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
rtvec vec = XVEC (PATTERN (tmp),
GET_CODE (PATTERN (tmp)) == ADDR_DIFF_VEC);
int i, veclen = GET_NUM_ELEM (vec);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
for (i = 0; i < veclen; ++i)
if (XEXP (RTVEC_ELT (vec, i), 0) == label)
return true;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return false;
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Return an estimate of the cost of computing rtx X.
One use is in cse, to decide which expression to keep in the hash table.
Another is in rtl generation, to pick the cheapest way to multiply.
Other uses like the latter are expected in the future. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int
rtx_cost (rtx x, enum rtx_code outer_code ATTRIBUTE_UNUSED)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int i, j;
enum rtx_code code;
const char *fmt;
int total;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (x == 0)
return 0;
/* Compute the default costs of certain things.
Note that targetm.rtx_costs can override the defaults. */
code = GET_CODE (x);
switch (code)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
case MULT:
total = COSTS_N_INSNS (5);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
break;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
case DIV:
case UDIV:
case MOD:
case UMOD:
total = COSTS_N_INSNS (7);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
break;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
case USE:
/* Used in combine.c as a marker. */
total = 0;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
break;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
default:
total = COSTS_N_INSNS (1);
}
switch (code)
{
case REG:
return 0;
case SUBREG:
total = 0;
/* If we can't tie these modes, make this expensive. The larger
the mode, the more expensive it is. */
if (! MODES_TIEABLE_P (GET_MODE (x), GET_MODE (SUBREG_REG (x))))
return COSTS_N_INSNS (2
+ GET_MODE_SIZE (GET_MODE (x)) / UNITS_PER_WORD);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
break;
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
default:
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (targetm.rtx_costs (x, code, outer_code, &total))
return total;
break;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Sum the costs of the sub-rtx's, plus cost of this operation,
which is already in total. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
if (fmt[i] == 'e')
total += rtx_cost (XEXP (x, i), code);
else if (fmt[i] == 'E')
for (j = 0; j < XVECLEN (x, i); j++)
total += rtx_cost (XVECEXP (x, i, j), code);
return total;
}
/* Return cost of address expression X.
Expect that X is properly formed address reference. */
int
address_cost (rtx x, enum machine_mode mode)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* We may be asked for cost of various unusual addresses, such as operands
of push instruction. It is not worthwhile to complicate writing
of the target hook by such cases. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (!memory_address_p (mode, x))
return 1000;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return targetm.address_cost (x);
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* If the target doesn't override, compute the cost as with arithmetic. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
int
default_address_cost (rtx x)
{
return rtx_cost (x, MEM);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned HOST_WIDE_INT
nonzero_bits (rtx x, enum machine_mode mode)
{
return cached_nonzero_bits (x, mode, NULL_RTX, VOIDmode, 0);
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned int
num_sign_bit_copies (rtx x, enum machine_mode mode)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return cached_num_sign_bit_copies (x, mode, NULL_RTX, VOIDmode, 0);
}
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* The function cached_nonzero_bits is a wrapper around nonzero_bits1.
It avoids exponential behavior in nonzero_bits1 when X has
identical subexpressions on the first or the second level. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
static unsigned HOST_WIDE_INT
cached_nonzero_bits (rtx x, enum machine_mode mode, rtx known_x,
enum machine_mode known_mode,
unsigned HOST_WIDE_INT known_ret)
{
if (x == known_x && mode == known_mode)
return known_ret;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Try to find identical subexpressions. If found call
nonzero_bits1 on X with the subexpressions as KNOWN_X and the
precomputed value for the subexpression as KNOWN_RET. */
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (ARITHMETIC_P (x))
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
rtx x0 = XEXP (x, 0);
rtx x1 = XEXP (x, 1);
/* Check the first level. */
if (x0 == x1)
return nonzero_bits1 (x, mode, x0, mode,
cached_nonzero_bits (x0, mode, known_x,
known_mode, known_ret));
/* Check the second level. */
if (ARITHMETIC_P (x0)
&& (x1 == XEXP (x0, 0) || x1 == XEXP (x0, 1)))
return nonzero_bits1 (x, mode, x1, mode,
cached_nonzero_bits (x1, mode, known_x,
known_mode, known_ret));
if (ARITHMETIC_P (x1)
&& (x0 == XEXP (x1, 0) || x0 == XEXP (x1, 1)))
return nonzero_bits1 (x, mode, x0, mode,
cached_nonzero_bits (x0, mode, known_x,
known_mode, known_ret));
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return nonzero_bits1 (x, mode, known_x, known_mode, known_ret);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* We let num_sign_bit_copies recur into nonzero_bits as that is useful.
We don't let nonzero_bits recur into num_sign_bit_copies, because that
is less useful. We can't allow both, because that results in exponential
run time recursion. There is a nullstone testcase that triggered
this. This macro avoids accidental uses of num_sign_bit_copies. */
#define cached_num_sign_bit_copies sorry_i_am_preventing_exponential_behavior
/* Given an expression, X, compute which bits in X can be nonzero.
We don't care about bits outside of those defined in MODE.
For most X this is simply GET_MODE_MASK (GET_MODE (MODE)), but if X is
an arithmetic operation, we can do better. */
static unsigned HOST_WIDE_INT
nonzero_bits1 (rtx x, enum machine_mode mode, rtx known_x,
enum machine_mode known_mode,
unsigned HOST_WIDE_INT known_ret)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
unsigned HOST_WIDE_INT nonzero = GET_MODE_MASK (mode);
unsigned HOST_WIDE_INT inner_nz;
enum rtx_code code;
unsigned int mode_width = GET_MODE_BITSIZE (mode);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* For floating-point values, assume all bits are needed. */
if (FLOAT_MODE_P (GET_MODE (x)) || FLOAT_MODE_P (mode))
return nonzero;
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* If X is wider than MODE, use its mode instead. */
if (GET_MODE_BITSIZE (GET_MODE (x)) > mode_width)
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
{
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
mode = GET_MODE (x);
nonzero = GET_MODE_MASK (mode);
mode_width = GET_MODE_BITSIZE (mode);
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
}
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (mode_width > HOST_BITS_PER_WIDE_INT)
/* Our only callers in this case look for single bit values. So
just return the mode mask. Those tests will then be false. */
return nonzero;
#ifndef WORD_REGISTER_OPERATIONS
/* If MODE is wider than X, but both are a single word for both the host
and target machines, we can compute this from which bits of the
object might be nonzero in its own mode, taking into account the fact
that on many CISC machines, accessing an object in a wider mode
causes the high-order bits to become undefined. So they are
not known to be zero. */
if (GET_MODE (x) != VOIDmode && GET_MODE (x) != mode
&& GET_MODE_BITSIZE (GET_MODE (x)) <= BITS_PER_WORD
&& GET_MODE_BITSIZE (GET_MODE (x)) <= HOST_BITS_PER_WIDE_INT
&& GET_MODE_BITSIZE (mode) > GET_MODE_BITSIZE (GET_MODE (x)))
{
nonzero &= cached_nonzero_bits (x, GET_MODE (x),
known_x, known_mode, known_ret);
nonzero |= GET_MODE_MASK (mode) & ~GET_MODE_MASK (GET_MODE (x));
return nonzero;
}
#endif
Gcc 3.3.1-pre as of 2003-07-11.
2003-07-11 03:40:53 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
code = GET_CODE (x);
switch (code)
{
case REG:
#if defined(POINTERS_EXTEND_UNSIGNED) && !defined(HAVE_ptr_extend)
/* If pointers extend unsigned and this is a pointer in Pmode, say that
all the bits above ptr_mode are known to be zero. */
if (POINTERS_EXTEND_UNSIGNED && GET_MODE (x) == Pmode
&& REG_POINTER (x))
nonzero &= GET_MODE_MASK (ptr_mode);
#endif
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
/* Include declared information about alignment of pointers. */
/* ??? We don't properly preserve REG_POINTER changes across
pointer-to-integer casts, so we can't trust it except for
things that we know must be pointers. See execute/960116-1.c. */
if ((x == stack_pointer_rtx
|| x == frame_pointer_rtx
|| x == arg_pointer_rtx)
&& REGNO_POINTER_ALIGN (REGNO (x)))
{
unsigned HOST_WIDE_INT alignment
= REGNO_POINTER_ALIGN (REGNO (x)) / BITS_PER_UNIT;
#ifdef PUSH_ROUNDING
/* If PUSH_ROUNDING is defined, it is possible for the
stack to be momentarily aligned only to that amount,
so we pick the least alignment. */
if (x == stack_pointer_rtx && PUSH_ARGS)
alignment = MIN ((unsigned HOST_WIDE_INT) PUSH_ROUNDING (1),
alignment);
#endif
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
nonzero &= ~(alignment - 1);
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
{
unsigned HOST_WIDE_INT nonzero_for_hook = nonzero;
rtx new = rtl_hooks.reg_nonzero_bits (x, mode, known_x,
known_mode, known_ret,
&nonzero_for_hook);
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
if (new)
nonzero_for_hook &= cached_nonzero_bits (new, mode, known_x,
known_mode, known_ret);
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
return nonzero_for_hook;
}
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
GCC 4.2.0 release.
2007-05-19 01:19:51 +00:00
case CONST_INT:
#ifdef SHORT_IMMEDIATES_SIGN_EXTEND
/* If X is negative in MODE, sign-extend the value. */
if (INTVAL (x) > 0 && mode_width < BITS_PER_WORD
&& 0 != (INTVAL (x) & ((HOST_WIDE_INT) 1 << (mode_width - 1))))
return (INTVAL (x) | ((HOST_WIDE_INT) (-1) << mode_width));
#endif
return INTVAL (x);
case MEM:
#ifdef LOAD_EXTEND_OP
/* In many, if not most, RISC machines, reading a byte from memory
zeros the rest of the register. Noticing that fact saves a lot
of extra zero-extends. */
if (LOAD_EXTEND_OP (GET_MODE (x)) == ZERO_EXTEND)
nonzero &= GET_MODE_MASK (GET_MODE (x));
#endif
break;
case EQ: case NE:
case UNEQ: case LTGT:
case GT: case GTU: case UNGT:
case LT: case LTU: case UNLT:
case GE: case GEU: case UNGE:
case LE: case LEU: case UNLE:
case UNORDERED: case ORDERED:
/* If this produces an integer result, we know which bits are set.
Code here used to clear bits outside the mode of X, but that is
now done above. */
/* Mind that MODE is the mode the caller wants to look at this
operation in, and not the actual operation mode. We can wind
up with (subreg:DI (gt:V4HI x y)), and we don't have anything
that describes the results of a vector compare. */
if (GET_MODE_CLASS (GET_MODE (x)) == MODE_INT
&& mode_width <= HOST_BITS_PER_WIDE_INT)
nonzero = STORE_FLAG_VALUE;
break;
case NEG:
#if 0
/* Disabled to avoid exponential mutual recursion between nonzero_bits
and num_sign_bit_copies. */
if (num_sign_bit_copies (XEXP (x, 0), GET_MODE (x))
== GET_MODE_BITSIZE (GET_MODE (x)))
nonzero = 1;
#endif
if (GET_MODE_SIZE (GET_MODE (x)) < mode_width)
nonzero |= (GET_MODE_MASK (mode) & ~GET_MODE_MASK (GET_MODE (x)));
break;
case ABS:
#if 0
/* Disabled to avoid exponential mutual recursion between nonzero_bits
and num_sign_bit_copies. */
if (num_sign_bit_copies (XEXP (x, 0), GET_MODE (x))
== GET_MODE_BITSIZE (GET_MODE (x)))
nonzero = 1;
#endif
break;
case TRUNCATE:
nonzero &= (cached_nonzero_bits (XEXP (x, 0), mode,
known_x, known_mode, known_ret)
& GET_MODE_MASK (mode));
break;
case ZERO_EXTEND:
nonzero &= cached_nonzero_bits (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
if (GET_MODE (XEXP (x, 0)) != VOIDmode)
nonzero &= GET_MODE_MASK (GET_MODE (XEXP (x, 0)));
break;
case SIGN_EXTEND:
/* If the sign bit is known clear, this is the same as ZERO_EXTEND.
Otherwise, show all the bits in the outer mode but not the inner
may be nonzero. */
inner_nz = cached_nonzero_bits (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
if (GET_MODE (XEXP (x, 0)) != VOIDmode)
{
inner_nz &= GET_MODE_MASK (GET_MODE (XEXP (x, 0)));
if (inner_nz
& (((HOST_WIDE_INT) 1
<< (GET_MODE_BITSIZE (GET_MODE (XEXP (x, 0))) - 1))))
inner_nz |= (GET_MODE_MASK (mode)
& ~GET_MODE_MASK (GET_MODE (XEXP (x, 0))));
}
nonzero &= inner_nz;
break;
case AND:
nonzero &= cached_nonzero_bits (XEXP (x, 0), mode,
known_x, known_mode, known_ret)
& cached_nonzero_bits (XEXP (x, 1), mode,
known_x, known_mode, known_ret);
break;
case XOR: case IOR:
case UMIN: case UMAX: case SMIN: case SMAX:
{
unsigned HOST_WIDE_INT nonzero0 =
cached_nonzero_bits (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
/* Don't call nonzero_bits for the second time if it cannot change
anything. */
if ((nonzero & nonzero0) != nonzero)
nonzero &= nonzero0
| cached_nonzero_bits (XEXP (x, 1), mode,
known_x, known_mode, known_ret);
}
break;
case PLUS: case MINUS:
case MULT:
case DIV: case UDIV:
case MOD: case UMOD:
/* We can apply the rules of arithmetic to compute the number of
high- and low-order zero bits of these operations. We start by
computing the width (position of the highest-order nonzero bit)
and the number of low-order zero bits for each value. */
{
unsigned HOST_WIDE_INT nz0 =
cached_nonzero_bits (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
unsigned HOST_WIDE_INT nz1 =
cached_nonzero_bits (XEXP (x, 1), mode,
known_x, known_mode, known_ret);
int sign_index = GET_MODE_BITSIZE (GET_MODE (x)) - 1;
int width0 = floor_log2 (nz0) + 1;
int width1 = floor_log2 (nz1) + 1;
int low0 = floor_log2 (nz0 & -nz0);
int low1 = floor_log2 (nz1 & -nz1);
HOST_WIDE_INT op0_maybe_minusp
= (nz0 & ((HOST_WIDE_INT) 1 << sign_index));
HOST_WIDE_INT op1_maybe_minusp
= (nz1 & ((HOST_WIDE_INT) 1 << sign_index));
unsigned int result_width = mode_width;
int result_low = 0;
switch (code)
{
case PLUS:
result_width = MAX (width0, width1) + 1;
result_low = MIN (low0, low1);
break;
case MINUS:
result_low = MIN (low0, low1);
break;
case MULT:
result_width = width0 + width1;
result_low = low0 + low1;
break;
case DIV:
if (width1 == 0)
break;
if (! op0_maybe_minusp && ! op1_maybe_minusp)
result_width = width0;
break;
case UDIV:
if (width1 == 0)
break;
result_width = width0;
break;
case MOD:
if (width1 == 0)
break;
if (! op0_maybe_minusp && ! op1_maybe_minusp)
result_width = MIN (width0, width1);
result_low = MIN (low0, low1);
break;
case UMOD:
if (width1 == 0)
break;
result_width = MIN (width0, width1);
result_low = MIN (low0, low1);
break;
default:
gcc_unreachable ();
}
if (result_width < mode_width)
nonzero &= ((HOST_WIDE_INT) 1 << result_width) - 1;
if (result_low > 0)
nonzero &= ~(((HOST_WIDE_INT) 1 << result_low) - 1);
#ifdef POINTERS_EXTEND_UNSIGNED
/* If pointers extend unsigned and this is an addition or subtraction
to a pointer in Pmode, all the bits above ptr_mode are known to be
zero. */
if (POINTERS_EXTEND_UNSIGNED > 0 && GET_MODE (x) == Pmode
&& (code == PLUS || code == MINUS)
&& REG_P (XEXP (x, 0)) && REG_POINTER (XEXP (x, 0)))
nonzero &= GET_MODE_MASK (ptr_mode);
#endif
}
break;
case ZERO_EXTRACT:
if (GET_CODE (XEXP (x, 1)) == CONST_INT
&& INTVAL (XEXP (x, 1)) < HOST_BITS_PER_WIDE_INT)
nonzero &= ((HOST_WIDE_INT) 1 << INTVAL (XEXP (x, 1))) - 1;
break;
case SUBREG:
/* If this is a SUBREG formed for a promoted variable that has
been zero-extended, we know that at least the high-order bits
are zero, though others might be too. */
if (SUBREG_PROMOTED_VAR_P (x) && SUBREG_PROMOTED_UNSIGNED_P (x) > 0)
nonzero = GET_MODE_MASK (GET_MODE (x))
& cached_nonzero_bits (SUBREG_REG (x), GET_MODE (x),
known_x, known_mode, known_ret);
/* If the inner mode is a single word for both the host and target
machines, we can compute this from which bits of the inner
object might be nonzero. */
if (GET_MODE_BITSIZE (GET_MODE (SUBREG_REG (x))) <= BITS_PER_WORD
&& (GET_MODE_BITSIZE (GET_MODE (SUBREG_REG (x)))
<= HOST_BITS_PER_WIDE_INT))
{
nonzero &= cached_nonzero_bits (SUBREG_REG (x), mode,
known_x, known_mode, known_ret);
#if defined (WORD_REGISTER_OPERATIONS) && defined (LOAD_EXTEND_OP)
/* If this is a typical RISC machine, we only have to worry
about the way loads are extended. */
if ((LOAD_EXTEND_OP (GET_MODE (SUBREG_REG (x))) == SIGN_EXTEND
? (((nonzero
& (((unsigned HOST_WIDE_INT) 1
<< (GET_MODE_BITSIZE (GET_MODE (SUBREG_REG (x))) - 1))))
!= 0))
: LOAD_EXTEND_OP (GET_MODE (SUBREG_REG (x))) != ZERO_EXTEND)
|| !MEM_P (SUBREG_REG (x)))
#endif
{
/* On many CISC machines, accessing an object in a wider mode
causes the high-order bits to become undefined. So they are
not known to be zero. */
if (GET_MODE_SIZE (GET_MODE (x))
> GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))))
nonzero |= (GET_MODE_MASK (GET_MODE (x))
& ~GET_MODE_MASK (GET_MODE (SUBREG_REG (x))));
}
}
break;
case ASHIFTRT:
case LSHIFTRT:
case ASHIFT:
case ROTATE:
/* The nonzero bits are in two classes: any bits within MODE
that aren't in GET_MODE (x) are always significant. The rest of the
nonzero bits are those that are significant in the operand of
the shift when shifted the appropriate number of bits. This
shows that high-order bits are cleared by the right shift and
low-order bits by left shifts. */
if (GET_CODE (XEXP (x, 1)) == CONST_INT
&& INTVAL (XEXP (x, 1)) >= 0
&& INTVAL (XEXP (x, 1)) < HOST_BITS_PER_WIDE_INT)
{
enum machine_mode inner_mode = GET_MODE (x);
unsigned int width = GET_MODE_BITSIZE (inner_mode);
int count = INTVAL (XEXP (x, 1));
unsigned HOST_WIDE_INT mode_mask = GET_MODE_MASK (inner_mode);
unsigned HOST_WIDE_INT op_nonzero =
cached_nonzero_bits (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
unsigned HOST_WIDE_INT inner = op_nonzero & mode_mask;
unsigned HOST_WIDE_INT outer = 0;
if (mode_width > width)
outer = (op_nonzero & nonzero & ~mode_mask);
if (code == LSHIFTRT)
inner >>= count;
else if (code == ASHIFTRT)
{
inner >>= count;
/* If the sign bit may have been nonzero before the shift, we
need to mark all the places it could have been copied to
by the shift as possibly nonzero. */
if (inner & ((HOST_WIDE_INT) 1 << (width - 1 - count)))
inner |= (((HOST_WIDE_INT) 1 << count) - 1) << (width - count);
}
else if (code == ASHIFT)
inner <<= count;
else
inner = ((inner << (count % width)
| (inner >> (width - (count % width)))) & mode_mask);
nonzero &= (outer | inner);
}
break;
case FFS:
case POPCOUNT:
/* This is at most the number of bits in the mode. */
nonzero = ((HOST_WIDE_INT) 2 << (floor_log2 (mode_width))) - 1;
break;
case CLZ:
/* If CLZ has a known value at zero, then the nonzero bits are
that value, plus the number of bits in the mode minus one. */
if (CLZ_DEFINED_VALUE_AT_ZERO (mode, nonzero))
nonzero |= ((HOST_WIDE_INT) 1 << (floor_log2 (mode_width))) - 1;
else
nonzero = -1;
break;
case CTZ:
/* If CTZ has a known value at zero, then the nonzero bits are
that value, plus the number of bits in the mode minus one. */
if (CTZ_DEFINED_VALUE_AT_ZERO (mode, nonzero))
nonzero |= ((HOST_WIDE_INT) 1 << (floor_log2 (mode_width))) - 1;
else
nonzero = -1;
break;
case PARITY:
nonzero = 1;
break;
case IF_THEN_ELSE:
{
unsigned HOST_WIDE_INT nonzero_true =
cached_nonzero_bits (XEXP (x, 1), mode,
known_x, known_mode, known_ret);
/* Don't call nonzero_bits for the second time if it cannot change
anything. */
if ((nonzero & nonzero_true) != nonzero)
nonzero &= nonzero_true
| cached_nonzero_bits (XEXP (x, 2), mode,
known_x, known_mode, known_ret);
}
break;
default:
break;
}
return nonzero;
}
/* See the macro definition above. */
#undef cached_num_sign_bit_copies
/* The function cached_num_sign_bit_copies is a wrapper around
num_sign_bit_copies1. It avoids exponential behavior in
num_sign_bit_copies1 when X has identical subexpressions on the
first or the second level. */
static unsigned int
cached_num_sign_bit_copies (rtx x, enum machine_mode mode, rtx known_x,
enum machine_mode known_mode,
unsigned int known_ret)
{
if (x == known_x && mode == known_mode)
return known_ret;
/* Try to find identical subexpressions. If found call
num_sign_bit_copies1 on X with the subexpressions as KNOWN_X and
the precomputed value for the subexpression as KNOWN_RET. */
if (ARITHMETIC_P (x))
{
rtx x0 = XEXP (x, 0);
rtx x1 = XEXP (x, 1);
/* Check the first level. */
if (x0 == x1)
return
num_sign_bit_copies1 (x, mode, x0, mode,
cached_num_sign_bit_copies (x0, mode, known_x,
known_mode,
known_ret));
/* Check the second level. */
if (ARITHMETIC_P (x0)
&& (x1 == XEXP (x0, 0) || x1 == XEXP (x0, 1)))
return
num_sign_bit_copies1 (x, mode, x1, mode,
cached_num_sign_bit_copies (x1, mode, known_x,
known_mode,
known_ret));
if (ARITHMETIC_P (x1)
&& (x0 == XEXP (x1, 0) || x0 == XEXP (x1, 1)))
return
num_sign_bit_copies1 (x, mode, x0, mode,
cached_num_sign_bit_copies (x0, mode, known_x,
known_mode,
known_ret));
}
return num_sign_bit_copies1 (x, mode, known_x, known_mode, known_ret);
}
/* Return the number of bits at the high-order end of X that are known to
be equal to the sign bit. X will be used in mode MODE; if MODE is
VOIDmode, X will be used in its own mode. The returned value will always
be between 1 and the number of bits in MODE. */
static unsigned int
num_sign_bit_copies1 (rtx x, enum machine_mode mode, rtx known_x,
enum machine_mode known_mode,
unsigned int known_ret)
{
enum rtx_code code = GET_CODE (x);
unsigned int bitwidth = GET_MODE_BITSIZE (mode);
int num0, num1, result;
unsigned HOST_WIDE_INT nonzero;
/* If we weren't given a mode, use the mode of X. If the mode is still
VOIDmode, we don't know anything. Likewise if one of the modes is
floating-point. */
if (mode == VOIDmode)
mode = GET_MODE (x);
if (mode == VOIDmode || FLOAT_MODE_P (mode) || FLOAT_MODE_P (GET_MODE (x)))
return 1;
/* For a smaller object, just ignore the high bits. */
if (bitwidth < GET_MODE_BITSIZE (GET_MODE (x)))
{
num0 = cached_num_sign_bit_copies (x, GET_MODE (x),
known_x, known_mode, known_ret);
return MAX (1,
num0 - (int) (GET_MODE_BITSIZE (GET_MODE (x)) - bitwidth));
}
if (GET_MODE (x) != VOIDmode && bitwidth > GET_MODE_BITSIZE (GET_MODE (x)))
{
#ifndef WORD_REGISTER_OPERATIONS
/* If this machine does not do all register operations on the entire
register and MODE is wider than the mode of X, we can say nothing
at all about the high-order bits. */
return 1;
#else
/* Likewise on machines that do, if the mode of the object is smaller
than a word and loads of that size don't sign extend, we can say
nothing about the high order bits. */
if (GET_MODE_BITSIZE (GET_MODE (x)) < BITS_PER_WORD
#ifdef LOAD_EXTEND_OP
&& LOAD_EXTEND_OP (GET_MODE (x)) != SIGN_EXTEND
#endif
)
return 1;
#endif
}
switch (code)
{
case REG:
#if defined(POINTERS_EXTEND_UNSIGNED) && !defined(HAVE_ptr_extend)
/* If pointers extend signed and this is a pointer in Pmode, say that
all the bits above ptr_mode are known to be sign bit copies. */
if (! POINTERS_EXTEND_UNSIGNED && GET_MODE (x) == Pmode && mode == Pmode
&& REG_POINTER (x))
return GET_MODE_BITSIZE (Pmode) - GET_MODE_BITSIZE (ptr_mode) + 1;
#endif
{
unsigned int copies_for_hook = 1, copies = 1;
rtx new = rtl_hooks.reg_num_sign_bit_copies (x, mode, known_x,
known_mode, known_ret,
&copies_for_hook);
if (new)
copies = cached_num_sign_bit_copies (new, mode, known_x,
known_mode, known_ret);
if (copies > 1 || copies_for_hook > 1)
return MAX (copies, copies_for_hook);
/* Else, use nonzero_bits to guess num_sign_bit_copies (see below). */
}
break;
case MEM:
#ifdef LOAD_EXTEND_OP
/* Some RISC machines sign-extend all loads of smaller than a word. */
if (LOAD_EXTEND_OP (GET_MODE (x)) == SIGN_EXTEND)
return MAX (1, ((int) bitwidth
- (int) GET_MODE_BITSIZE (GET_MODE (x)) + 1));
#endif
break;
case CONST_INT:
/* If the constant is negative, take its 1's complement and remask.
Then see how many zero bits we have. */
nonzero = INTVAL (x) & GET_MODE_MASK (mode);
if (bitwidth <= HOST_BITS_PER_WIDE_INT
&& (nonzero & ((HOST_WIDE_INT) 1 << (bitwidth - 1))) != 0)
nonzero = (~nonzero) & GET_MODE_MASK (mode);
return (nonzero == 0 ? bitwidth : bitwidth - floor_log2 (nonzero) - 1);
case SUBREG:
/* If this is a SUBREG for a promoted object that is sign-extended
and we are looking at it in a wider mode, we know that at least the
high-order bits are known to be sign bit copies. */
if (SUBREG_PROMOTED_VAR_P (x) && ! SUBREG_PROMOTED_UNSIGNED_P (x))
{
num0 = cached_num_sign_bit_copies (SUBREG_REG (x), mode,
known_x, known_mode, known_ret);
return MAX ((int) bitwidth
- (int) GET_MODE_BITSIZE (GET_MODE (x)) + 1,
num0);
}
/* For a smaller object, just ignore the high bits. */
if (bitwidth <= GET_MODE_BITSIZE (GET_MODE (SUBREG_REG (x))))
{
num0 = cached_num_sign_bit_copies (SUBREG_REG (x), VOIDmode,
known_x, known_mode, known_ret);
return MAX (1, (num0
- (int) (GET_MODE_BITSIZE (GET_MODE (SUBREG_REG (x)))
- bitwidth)));
}
#ifdef WORD_REGISTER_OPERATIONS
#ifdef LOAD_EXTEND_OP
/* For paradoxical SUBREGs on machines where all register operations
affect the entire register, just look inside. Note that we are
passing MODE to the recursive call, so the number of sign bit copies
will remain relative to that mode, not the inner mode. */
/* This works only if loads sign extend. Otherwise, if we get a
reload for the inner part, it may be loaded from the stack, and
then we lose all sign bit copies that existed before the store
to the stack. */
if ((GET_MODE_SIZE (GET_MODE (x))
> GET_MODE_SIZE (GET_MODE (SUBREG_REG (x))))
&& LOAD_EXTEND_OP (GET_MODE (SUBREG_REG (x))) == SIGN_EXTEND
&& MEM_P (SUBREG_REG (x)))
return cached_num_sign_bit_copies (SUBREG_REG (x), mode,
known_x, known_mode, known_ret);
#endif
#endif
break;
case SIGN_EXTRACT:
if (GET_CODE (XEXP (x, 1)) == CONST_INT)
return MAX (1, (int) bitwidth - INTVAL (XEXP (x, 1)));
break;
case SIGN_EXTEND:
return (bitwidth - GET_MODE_BITSIZE (GET_MODE (XEXP (x, 0)))
+ cached_num_sign_bit_copies (XEXP (x, 0), VOIDmode,
known_x, known_mode, known_ret));
case TRUNCATE:
/* For a smaller object, just ignore the high bits. */
num0 = cached_num_sign_bit_copies (XEXP (x, 0), VOIDmode,
known_x, known_mode, known_ret);
return MAX (1, (num0 - (int) (GET_MODE_BITSIZE (GET_MODE (XEXP (x, 0)))
- bitwidth)));
case NOT:
return cached_num_sign_bit_copies (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
case ROTATE: case ROTATERT:
/* If we are rotating left by a number of bits less than the number
of sign bit copies, we can just subtract that amount from the
number. */
if (GET_CODE (XEXP (x, 1)) == CONST_INT
&& INTVAL (XEXP (x, 1)) >= 0
&& INTVAL (XEXP (x, 1)) < (int) bitwidth)
{
num0 = cached_num_sign_bit_copies (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
return MAX (1, num0 - (code == ROTATE ? INTVAL (XEXP (x, 1))
: (int) bitwidth - INTVAL (XEXP (x, 1))));
}
break;
case NEG:
/* In general, this subtracts one sign bit copy. But if the value
is known to be positive, the number of sign bit copies is the
same as that of the input. Finally, if the input has just one bit
that might be nonzero, all the bits are copies of the sign bit. */
num0 = cached_num_sign_bit_copies (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
if (bitwidth > HOST_BITS_PER_WIDE_INT)
return num0 > 1 ? num0 - 1 : 1;
nonzero = nonzero_bits (XEXP (x, 0), mode);
if (nonzero == 1)
return bitwidth;
if (num0 > 1
&& (((HOST_WIDE_INT) 1 << (bitwidth - 1)) & nonzero))
num0--;
return num0;
case IOR: case AND: case XOR:
case SMIN: case SMAX: case UMIN: case UMAX:
/* Logical operations will preserve the number of sign-bit copies.
MIN and MAX operations always return one of the operands. */
num0 = cached_num_sign_bit_copies (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
num1 = cached_num_sign_bit_copies (XEXP (x, 1), mode,
known_x, known_mode, known_ret);
return MIN (num0, num1);
case PLUS: case MINUS:
/* For addition and subtraction, we can have a 1-bit carry. However,
if we are subtracting 1 from a positive number, there will not
be such a carry. Furthermore, if the positive number is known to
be 0 or 1, we know the result is either -1 or 0. */
if (code == PLUS && XEXP (x, 1) == constm1_rtx
&& bitwidth <= HOST_BITS_PER_WIDE_INT)
{
nonzero = nonzero_bits (XEXP (x, 0), mode);
if ((((HOST_WIDE_INT) 1 << (bitwidth - 1)) & nonzero) == 0)
return (nonzero == 1 || nonzero == 0 ? bitwidth
: bitwidth - floor_log2 (nonzero) - 1);
}
num0 = cached_num_sign_bit_copies (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
num1 = cached_num_sign_bit_copies (XEXP (x, 1), mode,
known_x, known_mode, known_ret);
result = MAX (1, MIN (num0, num1) - 1);
#ifdef POINTERS_EXTEND_UNSIGNED
/* If pointers extend signed and this is an addition or subtraction
to a pointer in Pmode, all the bits above ptr_mode are known to be
sign bit copies. */
if (! POINTERS_EXTEND_UNSIGNED && GET_MODE (x) == Pmode
&& (code == PLUS || code == MINUS)
&& REG_P (XEXP (x, 0)) && REG_POINTER (XEXP (x, 0)))
result = MAX ((int) (GET_MODE_BITSIZE (Pmode)
- GET_MODE_BITSIZE (ptr_mode) + 1),
result);
#endif
return result;
case MULT:
/* The number of bits of the product is the sum of the number of
bits of both terms. However, unless one of the terms if known
to be positive, we must allow for an additional bit since negating
a negative number can remove one sign bit copy. */
num0 = cached_num_sign_bit_copies (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
num1 = cached_num_sign_bit_copies (XEXP (x, 1), mode,
known_x, known_mode, known_ret);
result = bitwidth - (bitwidth - num0) - (bitwidth - num1);
if (result > 0
&& (bitwidth > HOST_BITS_PER_WIDE_INT
|| (((nonzero_bits (XEXP (x, 0), mode)
& ((HOST_WIDE_INT) 1 << (bitwidth - 1))) != 0)
&& ((nonzero_bits (XEXP (x, 1), mode)
& ((HOST_WIDE_INT) 1 << (bitwidth - 1))) != 0))))
result--;
return MAX (1, result);
case UDIV:
/* The result must be <= the first operand. If the first operand
has the high bit set, we know nothing about the number of sign
bit copies. */
if (bitwidth > HOST_BITS_PER_WIDE_INT)
return 1;
else if ((nonzero_bits (XEXP (x, 0), mode)
& ((HOST_WIDE_INT) 1 << (bitwidth - 1))) != 0)
return 1;
else
return cached_num_sign_bit_copies (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
case UMOD:
/* The result must be <= the second operand. */
return cached_num_sign_bit_copies (XEXP (x, 1), mode,
known_x, known_mode, known_ret);
case DIV:
/* Similar to unsigned division, except that we have to worry about
the case where the divisor is negative, in which case we have
to add 1. */
result = cached_num_sign_bit_copies (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
if (result > 1
&& (bitwidth > HOST_BITS_PER_WIDE_INT
|| (nonzero_bits (XEXP (x, 1), mode)
& ((HOST_WIDE_INT) 1 << (bitwidth - 1))) != 0))
result--;
return result;
case MOD:
result = cached_num_sign_bit_copies (XEXP (x, 1), mode,
known_x, known_mode, known_ret);
if (result > 1
&& (bitwidth > HOST_BITS_PER_WIDE_INT
|| (nonzero_bits (XEXP (x, 1), mode)
& ((HOST_WIDE_INT) 1 << (bitwidth - 1))) != 0))
result--;
return result;
case ASHIFTRT:
/* Shifts by a constant add to the number of bits equal to the
sign bit. */
num0 = cached_num_sign_bit_copies (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
if (GET_CODE (XEXP (x, 1)) == CONST_INT
&& INTVAL (XEXP (x, 1)) > 0)
num0 = MIN ((int) bitwidth, num0 + INTVAL (XEXP (x, 1)));
return num0;
case ASHIFT:
/* Left shifts destroy copies. */
if (GET_CODE (XEXP (x, 1)) != CONST_INT
|| INTVAL (XEXP (x, 1)) < 0
|| INTVAL (XEXP (x, 1)) >= (int) bitwidth)
return 1;
num0 = cached_num_sign_bit_copies (XEXP (x, 0), mode,
known_x, known_mode, known_ret);
return MAX (1, num0 - INTVAL (XEXP (x, 1)));
case IF_THEN_ELSE:
num0 = cached_num_sign_bit_copies (XEXP (x, 1), mode,
known_x, known_mode, known_ret);
num1 = cached_num_sign_bit_copies (XEXP (x, 2), mode,
known_x, known_mode, known_ret);
return MIN (num0, num1);
case EQ: case NE: case GE: case GT: case LE: case LT:
case UNEQ: case LTGT: case UNGE: case UNGT: case UNLE: case UNLT:
case GEU: case GTU: case LEU: case LTU:
case UNORDERED: case ORDERED:
/* If the constant is negative, take its 1's complement and remask.
Then see how many zero bits we have. */
nonzero = STORE_FLAG_VALUE;
if (bitwidth <= HOST_BITS_PER_WIDE_INT
&& (nonzero & ((HOST_WIDE_INT) 1 << (bitwidth - 1))) != 0)
nonzero = (~nonzero) & GET_MODE_MASK (mode);
return (nonzero == 0 ? bitwidth : bitwidth - floor_log2 (nonzero) - 1);
default:
break;
}
/* If we haven't been able to figure it out by one of the above rules,
see if some of the high-order bits are known to be zero. If so,
count those bits and return one less than that amount. If we can't
safely compute the mask for this mode, always return BITWIDTH. */
bitwidth = GET_MODE_BITSIZE (mode);
if (bitwidth > HOST_BITS_PER_WIDE_INT)
return 1;
nonzero = nonzero_bits (x, mode);
return nonzero & ((HOST_WIDE_INT) 1 << (bitwidth - 1))
? 1 : bitwidth - floor_log2 (nonzero) - 1;
}
/* Calculate the rtx_cost of a single instruction. A return value of
zero indicates an instruction pattern without a known cost. */
int
insn_rtx_cost (rtx pat)
{
int i, cost;
rtx set;
/* Extract the single set rtx from the instruction pattern.
We can't use single_set since we only have the pattern. */
if (GET_CODE (pat) == SET)
set = pat;
else if (GET_CODE (pat) == PARALLEL)
{
set = NULL_RTX;
for (i = 0; i < XVECLEN (pat, 0); i++)
{
rtx x = XVECEXP (pat, 0, i);
if (GET_CODE (x) == SET)
{
if (set)
return 0;
set = x;
}
}
if (!set)
return 0;
}
else
return 0;
cost = rtx_cost (SET_SRC (set), SET);
return cost > 0 ? cost : COSTS_N_INSNS (1);
}
/* Given an insn INSN and condition COND, return the condition in a
canonical form to simplify testing by callers. Specifically:
(1) The code will always be a comparison operation (EQ, NE, GT, etc.).
(2) Both operands will be machine operands; (cc0) will have been replaced.
(3) If an operand is a constant, it will be the second operand.
(4) (LE x const) will be replaced with (LT x <const+1>) and similarly
for GE, GEU, and LEU.
If the condition cannot be understood, or is an inequality floating-point
comparison which needs to be reversed, 0 will be returned.
If REVERSE is nonzero, then reverse the condition prior to canonizing it.
If EARLIEST is nonzero, it is a pointer to a place where the earliest
insn used in locating the condition was found. If a replacement test
of the condition is desired, it should be placed in front of that
insn and we will be sure that the inputs are still valid.
If WANT_REG is nonzero, we wish the condition to be relative to that
register, if possible. Therefore, do not canonicalize the condition
further. If ALLOW_CC_MODE is nonzero, allow the condition returned
to be a compare to a CC mode register.
If VALID_AT_INSN_P, the condition must be valid at both *EARLIEST
and at INSN. */
rtx
canonicalize_condition (rtx insn, rtx cond, int reverse, rtx *earliest,
rtx want_reg, int allow_cc_mode, int valid_at_insn_p)
{
enum rtx_code code;
rtx prev = insn;
rtx set;
rtx tem;
rtx op0, op1;
int reverse_code = 0;
enum machine_mode mode;
basic_block bb = BLOCK_FOR_INSN (insn);
code = GET_CODE (cond);
mode = GET_MODE (cond);
op0 = XEXP (cond, 0);
op1 = XEXP (cond, 1);
if (reverse)
code = reversed_comparison_code (cond, insn);
if (code == UNKNOWN)
return 0;
if (earliest)
*earliest = insn;
/* If we are comparing a register with zero, see if the register is set
in the previous insn to a COMPARE or a comparison operation. Perform
the same tests as a function of STORE_FLAG_VALUE as find_comparison_args
in cse.c */
while ((GET_RTX_CLASS (code) == RTX_COMPARE
|| GET_RTX_CLASS (code) == RTX_COMM_COMPARE)
&& op1 == CONST0_RTX (GET_MODE (op0))
&& op0 != want_reg)
{
/* Set nonzero when we find something of interest. */
rtx x = 0;
#ifdef HAVE_cc0
/* If comparison with cc0, import actual comparison from compare
insn. */
if (op0 == cc0_rtx)
{
if ((prev = prev_nonnote_insn (prev)) == 0
|| !NONJUMP_INSN_P (prev)
|| (set = single_set (prev)) == 0
|| SET_DEST (set) != cc0_rtx)
return 0;
op0 = SET_SRC (set);
op1 = CONST0_RTX (GET_MODE (op0));
if (earliest)
*earliest = prev;
}
#endif
/* If this is a COMPARE, pick up the two things being compared. */
if (GET_CODE (op0) == COMPARE)
{
op1 = XEXP (op0, 1);
op0 = XEXP (op0, 0);
continue;
}
else if (!REG_P (op0))
break;
/* Go back to the previous insn. Stop if it is not an INSN. We also
stop if it isn't a single set or if it has a REG_INC note because
we don't want to bother dealing with it. */
if ((prev = prev_nonnote_insn (prev)) == 0
|| !NONJUMP_INSN_P (prev)
|| FIND_REG_INC_NOTE (prev, NULL_RTX)
/* In cfglayout mode, there do not have to be labels at the
beginning of a block, or jumps at the end, so the previous
conditions would not stop us when we reach bb boundary. */
|| BLOCK_FOR_INSN (prev) != bb)
break;
set = set_of (op0, prev);
if (set
&& (GET_CODE (set) != SET
|| !rtx_equal_p (SET_DEST (set), op0)))
break;
/* If this is setting OP0, get what it sets it to if it looks
relevant. */
if (set)
{
enum machine_mode inner_mode = GET_MODE (SET_DEST (set));
#ifdef FLOAT_STORE_FLAG_VALUE
REAL_VALUE_TYPE fsfv;
#endif
/* ??? We may not combine comparisons done in a CCmode with
comparisons not done in a CCmode. This is to aid targets
like Alpha that have an IEEE compliant EQ instruction, and
a non-IEEE compliant BEQ instruction. The use of CCmode is
actually artificial, simply to prevent the combination, but
should not affect other platforms.
However, we must allow VOIDmode comparisons to match either
CCmode or non-CCmode comparison, because some ports have
modeless comparisons inside branch patterns.
??? This mode check should perhaps look more like the mode check
in simplify_comparison in combine. */
if ((GET_CODE (SET_SRC (set)) == COMPARE
|| (((code == NE
|| (code == LT
&& GET_MODE_CLASS (inner_mode) == MODE_INT
&& (GET_MODE_BITSIZE (inner_mode)
<= HOST_BITS_PER_WIDE_INT)
&& (STORE_FLAG_VALUE
& ((HOST_WIDE_INT) 1
<< (GET_MODE_BITSIZE (inner_mode) - 1))))
#ifdef FLOAT_STORE_FLAG_VALUE
|| (code == LT
&& SCALAR_FLOAT_MODE_P (inner_mode)
&& (fsfv = FLOAT_STORE_FLAG_VALUE (inner_mode),
REAL_VALUE_NEGATIVE (fsfv)))
#endif
))
&& COMPARISON_P (SET_SRC (set))))
&& (((GET_MODE_CLASS (mode) == MODE_CC)
== (GET_MODE_CLASS (inner_mode) == MODE_CC))
|| mode == VOIDmode || inner_mode == VOIDmode))
x = SET_SRC (set);
else if (((code == EQ
|| (code == GE
&& (GET_MODE_BITSIZE (inner_mode)
<= HOST_BITS_PER_WIDE_INT)
&& GET_MODE_CLASS (inner_mode) == MODE_INT
&& (STORE_FLAG_VALUE
& ((HOST_WIDE_INT) 1
<< (GET_MODE_BITSIZE (inner_mode) - 1))))
#ifdef FLOAT_STORE_FLAG_VALUE
|| (code == GE
&& SCALAR_FLOAT_MODE_P (inner_mode)
&& (fsfv = FLOAT_STORE_FLAG_VALUE (inner_mode),
REAL_VALUE_NEGATIVE (fsfv)))
#endif
))
&& COMPARISON_P (SET_SRC (set))
&& (((GET_MODE_CLASS (mode) == MODE_CC)
== (GET_MODE_CLASS (inner_mode) == MODE_CC))
|| mode == VOIDmode || inner_mode == VOIDmode))
{
reverse_code = 1;
x = SET_SRC (set);
}
else
break;
}
else if (reg_set_p (op0, prev))
/* If this sets OP0, but not directly, we have to give up. */
break;
if (x)
{
/* If the caller is expecting the condition to be valid at INSN,
make sure X doesn't change before INSN. */
if (valid_at_insn_p)
if (modified_in_p (x, prev) || modified_between_p (x, prev, insn))
break;
if (COMPARISON_P (x))
code = GET_CODE (x);
if (reverse_code)
{
code = reversed_comparison_code (x, prev);
if (code == UNKNOWN)
return 0;
reverse_code = 0;
}
op0 = XEXP (x, 0), op1 = XEXP (x, 1);
if (earliest)
*earliest = prev;
}
}
/* If constant is first, put it last. */
if (CONSTANT_P (op0))
code = swap_condition (code), tem = op0, op0 = op1, op1 = tem;
/* If OP0 is the result of a comparison, we weren't able to find what
was really being compared, so fail. */
if (!allow_cc_mode
&& GET_MODE_CLASS (GET_MODE (op0)) == MODE_CC)
return 0;
/* Canonicalize any ordered comparison with integers involving equality
if we can do computations in the relevant mode and we do not
overflow. */
if (GET_MODE_CLASS (GET_MODE (op0)) != MODE_CC
&& GET_CODE (op1) == CONST_INT
&& GET_MODE (op0) != VOIDmode
&& GET_MODE_BITSIZE (GET_MODE (op0)) <= HOST_BITS_PER_WIDE_INT)
{
HOST_WIDE_INT const_val = INTVAL (op1);
unsigned HOST_WIDE_INT uconst_val = const_val;
unsigned HOST_WIDE_INT max_val
= (unsigned HOST_WIDE_INT) GET_MODE_MASK (GET_MODE (op0));
switch (code)
{
case LE:
if ((unsigned HOST_WIDE_INT) const_val != max_val >> 1)
code = LT, op1 = gen_int_mode (const_val + 1, GET_MODE (op0));
break;
/* When cross-compiling, const_val might be sign-extended from
BITS_PER_WORD to HOST_BITS_PER_WIDE_INT */
case GE:
if ((HOST_WIDE_INT) (const_val & max_val)
!= (((HOST_WIDE_INT) 1
<< (GET_MODE_BITSIZE (GET_MODE (op0)) - 1))))
code = GT, op1 = gen_int_mode (const_val - 1, GET_MODE (op0));
break;
case LEU:
if (uconst_val < max_val)
code = LTU, op1 = gen_int_mode (uconst_val + 1, GET_MODE (op0));
break;
case GEU:
if (uconst_val != 0)
code = GTU, op1 = gen_int_mode (uconst_val - 1, GET_MODE (op0));
break;
default:
break;
}
}
/* Never return CC0; return zero instead. */
if (CC0_P (op0))
return 0;
return gen_rtx_fmt_ee (code, VOIDmode, op0, op1);
}
/* Given a jump insn JUMP, return the condition that will cause it to branch
to its JUMP_LABEL. If the condition cannot be understood, or is an
inequality floating-point comparison which needs to be reversed, 0 will
be returned.
If EARLIEST is nonzero, it is a pointer to a place where the earliest
insn used in locating the condition was found. If a replacement test
of the condition is desired, it should be placed in front of that
insn and we will be sure that the inputs are still valid. If EARLIEST
is null, the returned condition will be valid at INSN.
If ALLOW_CC_MODE is nonzero, allow the condition returned to be a
compare CC mode register.
VALID_AT_INSN_P is the same as for canonicalize_condition. */
rtx
get_condition (rtx jump, rtx *earliest, int allow_cc_mode, int valid_at_insn_p)
{
rtx cond;
int reverse;
rtx set;
/* If this is not a standard conditional jump, we can't parse it. */
if (!JUMP_P (jump)
|| ! any_condjump_p (jump))
return 0;
set = pc_set (jump);
cond = XEXP (SET_SRC (set), 0);
/* If this branches to JUMP_LABEL when the condition is false, reverse
the condition. */
reverse
= GET_CODE (XEXP (SET_SRC (set), 2)) == LABEL_REF
&& XEXP (XEXP (SET_SRC (set), 2), 0) == JUMP_LABEL (jump);
return canonicalize_condition (jump, cond, reverse, earliest, NULL_RTX,
allow_cc_mode, valid_at_insn_p);
}
/* Initialize the table NUM_SIGN_BIT_COPIES_IN_REP based on
TARGET_MODE_REP_EXTENDED.
Note that we assume that the property of
TARGET_MODE_REP_EXTENDED(B, C) is sticky to the integral modes
narrower than mode B. I.e., if A is a mode narrower than B then in
order to be able to operate on it in mode B, mode A needs to
satisfy the requirements set by the representation of mode B. */
static void
init_num_sign_bit_copies_in_rep (void)
{
enum machine_mode mode, in_mode;
for (in_mode = GET_CLASS_NARROWEST_MODE (MODE_INT); in_mode != VOIDmode;
in_mode = GET_MODE_WIDER_MODE (mode))
for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != in_mode;
mode = GET_MODE_WIDER_MODE (mode))
{
enum machine_mode i;
/* Currently, it is assumed that TARGET_MODE_REP_EXTENDED
extends to the next widest mode. */
gcc_assert (targetm.mode_rep_extended (mode, in_mode) == UNKNOWN
|| GET_MODE_WIDER_MODE (mode) == in_mode);
/* We are in in_mode. Count how many bits outside of mode
have to be copies of the sign-bit. */
for (i = mode; i != in_mode; i = GET_MODE_WIDER_MODE (i))
{
enum machine_mode wider = GET_MODE_WIDER_MODE (i);
if (targetm.mode_rep_extended (i, wider) == SIGN_EXTEND
/* We can only check sign-bit copies starting from the
top-bit. In order to be able to check the bits we
have already seen we pretend that subsequent bits
have to be sign-bit copies too. */
|| num_sign_bit_copies_in_rep [in_mode][mode])
num_sign_bit_copies_in_rep [in_mode][mode]
+= GET_MODE_BITSIZE (wider) - GET_MODE_BITSIZE (i);
}
}
}
/* Suppose that truncation from the machine mode of X to MODE is not a
no-op. See if there is anything special about X so that we can
assume it already contains a truncated value of MODE. */
bool
truncated_to_mode (enum machine_mode mode, rtx x)
{
/* This register has already been used in MODE without explicit
truncation. */
if (REG_P (x) && rtl_hooks.reg_truncated_to_mode (mode, x))
return true;
/* See if we already satisfy the requirements of MODE. If yes we
can just switch to MODE. */
if (num_sign_bit_copies_in_rep[GET_MODE (x)][mode]
&& (num_sign_bit_copies (x, GET_MODE (x))
>= num_sign_bit_copies_in_rep[GET_MODE (x)][mode] + 1))
return true;
return false;
}
/* Initialize non_rtx_starting_operands, which is used to speed up
for_each_rtx. */
void
init_rtlanal (void)
{
int i;
for (i = 0; i < NUM_RTX_CODE; i++)
{
const char *format = GET_RTX_FORMAT (i);
const char *first = strpbrk (format, "eEV");
non_rtx_starting_operands[i] = first ? first - format : -1;
}
init_num_sign_bit_copies_in_rep ();
}
/* Check whether this is a constant pool constant. */
bool
constant_pool_constant_p (rtx x)
{
x = avoid_constant_pool_reference (x);
return GET_CODE (x) == CONST_DOUBLE;
Gcc 3.4.2 20040728.
2004-07-28 03:11:36 +00:00
}
Reference in New Issue Copy Permalink