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* [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
@ 2012-03-08 12:56 ro at gcc dot gnu.org
2012-03-08 13:50 ` [Bug target/52530] " ubizjak at gmail dot com
` (11 more replies)
0 siblings, 12 replies; 13+ messages in thread
From: ro at gcc dot gnu.org @ 2012-03-08 12:56 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
Bug #: 52530
Summary: [4.8 regression] Many 64-bit execution failures on
Solaris 10/11 with Sun as
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: ro@gcc.gnu.org
CC: hjl@gcc.gnu.org, ubizjak@gmail.com
Host: i386-pc-solaris2.1[01]
Target: i386-pc-solaris2.1[01]
Build: i386-pc-solaris2.1[01]
Between 20120302 and 20120307, many 64-bit execution tests all over the
testsuite
started to fail on Solaris 10 and 11/x86 when using Sun as. With gas, all is
fine.
E.g.
FAIL: gcc.c-torture/execute/20021120-1.c execution, -O3 -fomit-frame-pointer
-funroll-loops
The test aborts, and can be reproduced with -m64 -O1 -funroll-loops. If I add
printf's to investigate the failure (gdb cannot print optimized-out values
here),
the failure vanishes.
Between .s files for as and gas, there are no codegen differences when using
-fno-dwarf2-cfi-asm.
When I compare the 4.7 and mainline .s files with as, I find lots of changes
like
--- 20021120-1.s 2012-03-08 13:00:25.054484596 +0100
+++ /var/gcc/regression/trunk/10-gcc/build/gcc/testsuite/gcc/20021120-1.s
2012-03-08 12:48:21.890112842 +0100
@@ -534,37 +534,37 @@
movsd %xmm2, gd(,%rcx,8)
cvtsi2ss %eax, %xmm3
movss %xmm3, gf(,%rcx,4)
- leal 1(%rax), %edi
+ leal 1(%eax), %edi
cvtsi2sd %edi, %xmm4
movslq %edi, %r8
movsd %xmm4, gd(,%r8,8)
A reghunt revealed that this was caused by this patch:
2012-03-04 H.J. Lu <hongjiu.lu@intel.com>
* config/i386/i386.c (ix86_print_operand_address): Only handle
zero-extended DImode addresses.
I'm now trying another bootstrap with this change reverted to see if this fixes
all the failures.
Rainer
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
@ 2012-03-08 13:50 ` ubizjak at gmail dot com
2012-03-08 15:07 ` hjl.tools at gmail dot com
` (10 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: ubizjak at gmail dot com @ 2012-03-08 13:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
--- Comment #1 from Uros Bizjak <ubizjak at gmail dot com> 2012-03-08 13:49:52 UTC ---
Ouch.
Before the change, we always used "q" modifier for addresses, only in two
special cases we emitted "l". This "q" modifier forced DImode address even for
SImode operands, avoiding addr32 prefixes.
The change - while correct - cancelled this optimization.
So, please revert this patch ASAP.
Also, Sun is buggy in the way addr32 prefix is handled.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
2012-03-08 13:50 ` [Bug target/52530] " ubizjak at gmail dot com
@ 2012-03-08 15:07 ` hjl.tools at gmail dot com
2012-03-08 15:19 ` uros at gcc dot gnu.org
` (9 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: hjl.tools at gmail dot com @ 2012-03-08 15:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2012-03-08 15:06:32 UTC ---
(In reply to comment #1)
> Ouch.
>
> Before the change, we always used "q" modifier for addresses, only in two
> special cases we emitted "l". This "q" modifier forced DImode address even for
> SImode operands, avoiding addr32 prefixes.
>
> The change - while correct - cancelled this optimization.
>
> So, please revert this patch ASAP.
>
Uros, can you revert it for me? Thanks.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
2012-03-08 13:50 ` [Bug target/52530] " ubizjak at gmail dot com
2012-03-08 15:07 ` hjl.tools at gmail dot com
@ 2012-03-08 15:19 ` uros at gcc dot gnu.org
2012-03-08 18:17 ` ubizjak at gmail dot com
` (8 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: uros at gcc dot gnu.org @ 2012-03-08 15:19 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
--- Comment #3 from uros at gcc dot gnu.org 2012-03-08 15:19:36 UTC ---
Author: uros
Date: Thu Mar 8 15:19:32 2012
New Revision: 185103
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185103
Log:
PR target/52530
Revert:
2012-03-04 H.J. Lu <hongjiu.lu@intel.com>
* config/i386/i386.c (ix86_print_operand_address): Only handle
zero-extended DImode addresses.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
` (2 preceding siblings ...)
2012-03-08 15:19 ` uros at gcc dot gnu.org
@ 2012-03-08 18:17 ` ubizjak at gmail dot com
2012-03-09 14:55 ` ubizjak at gmail dot com
` (7 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: ubizjak at gmail dot com @ 2012-03-08 18:17 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
Uros Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.8.0
--- Comment #4 from Uros Bizjak <ubizjak at gmail dot com> 2012-03-08 18:16:21 UTC ---
Fixed by revert.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
` (3 preceding siblings ...)
2012-03-08 18:17 ` ubizjak at gmail dot com
@ 2012-03-09 14:55 ` ubizjak at gmail dot com
2012-03-09 15:17 ` hjl.tools at gmail dot com
` (6 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: ubizjak at gmail dot com @ 2012-03-09 14:55 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
Uros Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2012-03-09
Resolution|FIXED |
Ever Confirmed|0 |1
--- Comment #5 from Uros Bizjak <ubizjak at gmail dot com> 2012-03-09 14:55:18 UTC ---
However, there is a problem with Pmode != DImode. Consider following test:
struct foo
{
int *f;
int i;
};
void
__attribute__ ((noinline))
bar (struct foo x)
{
*(x.f) = 1;
}
This will compile with -mx32 to:
bar:
movl $1, (%rdi)
ret
which is wrong.
The move is:
#(insn:TI 6 3 13 2 (set (mem:SI (reg:SI 5 di [orig:60 x ] [60]) [4 *D.1704_1+0
S4 A32])
# (const_int 1 [0x1])) ptr.c:11 64 {*movsi_internal}
# (expr_list:REG_DEAD (reg:SI 5 di [orig:60 x ] [60])
# (nil)))
movl $1, (%rdi) # 6 *movsi_internal/2 [length = 6]
So we want to output address in SImode, while avoiding addr32 prefixes for
LEAs.
The patch from H.J. should be applied and LEAs should be fixed.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
` (4 preceding siblings ...)
2012-03-09 14:55 ` ubizjak at gmail dot com
@ 2012-03-09 15:17 ` hjl.tools at gmail dot com
2012-03-09 16:50 ` ubizjak at gmail dot com
` (5 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: hjl.tools at gmail dot com @ 2012-03-09 15:17 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> 2012-03-09 15:17:07 UTC ---
This patch works for me:
---
diff --git a/gcc/ChangeLog.addr32 b/gcc/ChangeLog.addr32
index 066f1ec..a191e47 100644
--- a/gcc/ChangeLog.addr32
+++ b/gcc/ChangeLog.addr32
@@ -1,3 +1,8 @@
+2012-03-08 H.J. Lu <hongjiu.lu@intel.com>
+
+ * config/i386/i386.c (ix86_print_operand_address): Only handle
+ zero-extended DImode addresses if Pmode == DImode.
+
2012-03-06 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.md (*zero_extendsidi2_rex64): Allow loading
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 69cb6ae..c2cad5a 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -14548,7 +14548,7 @@ ix86_print_operand_address (FILE *file, rtx addr)
/* Print SImode registers for zero-extended addresses to force
addr32 prefix. Otherwise print DImode registers to avoid it. */
- if (TARGET_64BIT)
+ if (Pmode == DImode)
code = ((GET_CODE (addr) == ZERO_EXTEND
|| GET_CODE (addr) == AND)
? 'l'
--
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
` (5 preceding siblings ...)
2012-03-09 15:17 ` hjl.tools at gmail dot com
@ 2012-03-09 16:50 ` ubizjak at gmail dot com
2012-03-09 17:08 ` ubizjak at gmail dot com
` (4 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: ubizjak at gmail dot com @ 2012-03-09 16:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
Uros Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |ASSIGNED
--- Comment #7 from Uros Bizjak <ubizjak at gmail dot com> 2012-03-09 16:50:12 UTC ---
(In reply to comment #6)
> This patch works for me:
>
> ---
> diff --git a/gcc/ChangeLog.addr32 b/gcc/ChangeLog.addr32
> index 066f1ec..a191e47 100644
> --- a/gcc/ChangeLog.addr32
> +++ b/gcc/ChangeLog.addr32
> @@ -1,3 +1,8 @@
> +2012-03-08 H.J. Lu <hongjiu.lu@intel.com>
> +
> + * config/i386/i386.c (ix86_print_operand_address): Only handle
> + zero-extended DImode addresses if Pmode == DImode.
> +
> 2012-03-06 Uros Bizjak <ubizjak@gmail.com>
>
> * config/i386/i386.md (*zero_extendsidi2_rex64): Allow loading
> diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
> index 69cb6ae..c2cad5a 100644
> --- a/gcc/config/i386/i386.c
> +++ b/gcc/config/i386/i386.c
> @@ -14548,7 +14548,7 @@ ix86_print_operand_address (FILE *file, rtx addr)
>
> /* Print SImode registers for zero-extended addresses to force
> addr32 prefix. Otherwise print DImode registers to avoid it. */
> - if (TARGET_64BIT)
> + if (Pmode == DImode)
> code = ((GET_CODE (addr) == ZERO_EXTEND
> || GET_CODE (addr) == AND)
> ? 'l'
> --
You will have addr32 added to all lea(%SImode),%SImode instructions.
I have a patch in testing that emits addresses in their natural mode (SImode or
DImode), forces 'l' override for the above RTXes and 'q' for all LEA insns.
For LEAs, we introduce %E modifier that enables special handling:
+ case 'E':
+ /* Wrap address in an UNSPEC to declare special handling. */
+ if (TARGET_64BIT)
+ x = gen_rtx_UNSPEC (DImode, gen_rtvec (1, x), UNSPEC_LEA_ADDR);
+
+ output_address (x);
+ return;
And in ix86_print_operand_address:
+ else if (GET_CODE (addr) == UNSPEC && XINT (addr, 1) == UNSPEC_LEA_ADDR)
+ {
+ gcc_assert (TARGET_64BIT);
+ ok = ix86_decompose_address (XVECEXP (addr, 0, 0), &parts);
+ code = 'q';
+ }
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
` (6 preceding siblings ...)
2012-03-09 16:50 ` ubizjak at gmail dot com
@ 2012-03-09 17:08 ` ubizjak at gmail dot com
2012-03-09 18:02 ` uros at gcc dot gnu.org
` (3 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: ubizjak at gmail dot com @ 2012-03-09 17:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
--- Comment #8 from Uros Bizjak <ubizjak at gmail dot com> 2012-03-09 17:08:13 UTC ---
Created attachment 26865
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26865
Patch that introduces %E modifier
Patch in testing.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
` (7 preceding siblings ...)
2012-03-09 17:08 ` ubizjak at gmail dot com
@ 2012-03-09 18:02 ` uros at gcc dot gnu.org
2012-03-11 19:49 ` uros at gcc dot gnu.org
` (2 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: uros at gcc dot gnu.org @ 2012-03-09 18:02 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
--- Comment #9 from uros at gcc dot gnu.org 2012-03-09 18:01:56 UTC ---
Author: uros
Date: Fri Mar 9 18:01:47 2012
New Revision: 185148
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185148
Log:
PR target/52530
* config/i386/i386.c (ix86_print_operand): Handle 'E' operand modifier.
(ix86_print_operand_address): Handle UNSPEC_LEA_ADDR. Do not fallback
to set code to 'q'.
* config/i386/i386.md (UNSPEC_LEA_ADDR): New unspec.
(*movdi_internal_rex64): Use %E operand modifier for lea.
(*movsi_internal): Ditto.
(*lea_1): Ditto.
(*lea<mode>_2): Ditto.
(*lea_{3,4,5,6}_zext): Ditto.
(*tls_global_dynamic_32_gnu): Ditto.
(*tls_global_dynamic_64): Ditto.
(*tls_dynamic_gnu2_lea_32): Ditto.
(*tls_dynamic_gnu2_lea_64): Ditto.
(pro_epilogue_adjust_stack_<mode>_add): Ditto.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.md
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
` (8 preceding siblings ...)
2012-03-09 18:02 ` uros at gcc dot gnu.org
@ 2012-03-11 19:49 ` uros at gcc dot gnu.org
2012-03-12 14:11 ` rguenth at gcc dot gnu.org
2012-08-01 19:15 ` uros at gcc dot gnu.org
11 siblings, 0 replies; 13+ messages in thread
From: uros at gcc dot gnu.org @ 2012-03-11 19:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
--- Comment #10 from uros at gcc dot gnu.org 2012-03-11 19:48:02 UTC ---
Author: uros
Date: Sun Mar 11 19:47:58 2012
New Revision: 185201
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185201
Log:
PR target/52530
* gcc.dg/torture/pr52530.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr52530.c
Modified:
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
` (9 preceding siblings ...)
2012-03-11 19:49 ` uros at gcc dot gnu.org
@ 2012-03-12 14:11 ` rguenth at gcc dot gnu.org
2012-08-01 19:15 ` uros at gcc dot gnu.org
11 siblings, 0 replies; 13+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-03-12 14:11 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #11 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-03-12 14:11:18 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/52530] [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as
2012-03-08 12:56 [Bug target/52530] New: [4.8 regression] Many 64-bit execution failures on Solaris 10/11 with Sun as ro at gcc dot gnu.org
` (10 preceding siblings ...)
2012-03-12 14:11 ` rguenth at gcc dot gnu.org
@ 2012-08-01 19:15 ` uros at gcc dot gnu.org
11 siblings, 0 replies; 13+ messages in thread
From: uros at gcc dot gnu.org @ 2012-08-01 19:15 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52530
--- Comment #12 from uros at gcc dot gnu.org 2012-08-01 19:15:04 UTC ---
Author: uros
Date: Wed Aug 1 19:14:59 2012
New Revision: 190048
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190048
Log:
Backport from mainline
2012-03-09 Uros Bizjak <ubizjak@gmail.com>
PR target/52530
* config/i386/i386.c (ix86_print_operand): Handle 'E' operand modifier.
(ix86_print_operand_address): Handle UNSPEC_LEA_ADDR. Do not fallback
to set code to 'q'.
* config/i386/i386.md (UNSPEC_LEA_ADDR): New unspec.
(*movdi_internal_rex64): Use %E operand modifier for lea.
(*movsi_internal): Ditto.
(*lea_1): Ditto.
(*lea<mode>_2): Ditto.
(*lea_{3,4,5,6}_zext): Ditto.
(*tls_global_dynamic_32_gnu): Ditto.
(*tls_global_dynamic_64): Ditto.
(*tls_dynamic_gnu2_lea_32): Ditto.
(*tls_dynamic_gnu2_lea_64): Ditto.
(pro_epilogue_adjust_stack_<mode>_add): Ditto.
testsuite/ChangeLog:
Backport from mainline
2012-03-11 Uros Bizjak <ubizjak@gmail.com>
PR target/52530
* gcc.dg/torture/pr52530.c: New test.
Added:
branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/pr52530.c
Modified:
branches/gcc-4_7-branch/gcc/ChangeLog
branches/gcc-4_7-branch/gcc/config/i386/i386.c
branches/gcc-4_7-branch/gcc/config/i386/i386.md
branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 13+ messages in thread
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