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* [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags
@ 2010-12-10 2:23 zsojka at seznam dot cz
2010-12-10 13:26 ` [Bug tree-optimization/46880] " rguenth at gcc dot gnu.org
` (11 more replies)
0 siblings, 12 replies; 13+ messages in thread
From: zsojka at seznam dot cz @ 2010-12-10 2:23 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
Summary: [4.6 Regression] g++.dg/other/pr40446.C FAILs with
custom flags
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: zsojka@seznam.cz
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 22702
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22702
reduced testcase
Compiler output:
$ g++ -O -fgcse -fstack-protector-all -funroll-loops -fschedule-insns
-fsched-pressure pr40446.ii
$ ./a.out
Aborted
Tested revisions:
r167643 - fail
r167556 - fail
r165699 - OK
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug tree-optimization/46880] [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
@ 2010-12-10 13:26 ` rguenth at gcc dot gnu.org
2010-12-18 21:33 ` zsojka at seznam dot cz
` (10 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: rguenth at gcc dot gnu.org @ 2010-12-10 13:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.6.0
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug tree-optimization/46880] [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
2010-12-10 13:26 ` [Bug tree-optimization/46880] " rguenth at gcc dot gnu.org
@ 2010-12-18 21:33 ` zsojka at seznam dot cz
2010-12-18 22:05 ` [Bug target/46880] [4.4/4.5/4.6 Regression] generating of shufpd is broken zsojka at seznam dot cz
` (9 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: zsojka at seznam dot cz @ 2010-12-18 21:33 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> 2010-12-18 21:33:03 UTC ---
Maybe better set of flags:
$ g++ -O -fgcse -fstack-protector-all -fschedule-insns -fsched-pressure -fweb
pr46880.C
$ ./a.out
Aborted
_Z3foov:
...
xorpd xmm1, xmm1 # tmp65
movsd xmm0, QWORD PTR .LC1[rip] # tmp68,
...
shufpd xmm0, xmm1, 1 # tmp66, tmp65
...
.LC1:
.long 0
.long 1072693248
is wrong, it loads 1.0 to lower 64bits of xmm0, and shufpd can't solve the
situation with given values in xmm0 and xmm1, when xmm0 is output:
it just moves xmm0[0] or xmm0[1] to xmm0[0], and xmm1[0] or xmm1[1] to xmm0[1]
either
xorpd xmm0, xmm0 # tmp65
movsd xmm1, QWORD PTR .LC1[rip] # tmp68,
shufpd xmm0, xmm1, 1 # tmp66, tmp65
or do it the same as with -fno-web:
xorpd xmm0, xmm0 # tmp65
movsd xmm1, QWORD PTR .LC1[rip] # tmp67,
unpcklpd xmm0, xmm1 # tmp65, tmp67
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/46880] [4.4/4.5/4.6 Regression] generating of shufpd is broken
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
2010-12-10 13:26 ` [Bug tree-optimization/46880] " rguenth at gcc dot gnu.org
2010-12-18 21:33 ` zsojka at seznam dot cz
@ 2010-12-18 22:05 ` zsojka at seznam dot cz
2010-12-18 23:17 ` hjl.tools at gmail dot com
` (8 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: zsojka at seznam dot cz @ 2010-12-18 22:05 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
--- Comment #2 from Zdenek Sojka <zsojka at seznam dot cz> 2010-12-18 22:05:03 UTC ---
Created attachment 22816
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22816
better testcase
$ gcc -O pr46880-2.c
$ ./a.out
Aborted
(will probably fail with strict aliasing)
4.4.5, 4.5.2, 4.6.0 fails, 4.3.5 doesn't generate shufpd
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/46880] [4.4/4.5/4.6 Regression] generating of shufpd is broken
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
` (2 preceding siblings ...)
2010-12-18 22:05 ` [Bug target/46880] [4.4/4.5/4.6 Regression] generating of shufpd is broken zsojka at seznam dot cz
@ 2010-12-18 23:17 ` hjl.tools at gmail dot com
2010-12-21 14:21 ` jakub at gcc dot gnu.org
` (7 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: hjl.tools at gmail dot com @ 2010-12-18 23:17 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2010.12.18 23:16:58
CC| |vmakarov at redhat dot com
Ever Confirmed|0 |1
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2010-12-18 23:16:58 UTC ---
This is caused by revision 167519:
http://gcc.gnu.org/ml/gcc-cvs/2010-12/msg00200.html
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/46880] [4.4/4.5/4.6 Regression] generating of shufpd is broken
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
` (3 preceding siblings ...)
2010-12-18 23:17 ` hjl.tools at gmail dot com
@ 2010-12-21 14:21 ` jakub at gcc dot gnu.org
2010-12-21 14:45 ` jakub at gcc dot gnu.org
` (6 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: jakub at gcc dot gnu.org @ 2010-12-21 14:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |jakub at gcc dot gnu.org
AssignedTo|unassigned at gcc dot |jakub at gcc dot gnu.org
|gnu.org |
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/46880] [4.4/4.5/4.6 Regression] generating of shufpd is broken
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
` (4 preceding siblings ...)
2010-12-21 14:21 ` jakub at gcc dot gnu.org
@ 2010-12-21 14:45 ` jakub at gcc dot gnu.org
2010-12-21 22:37 ` jakub at gcc dot gnu.org
` (5 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: jakub at gcc dot gnu.org @ 2010-12-21 14:45 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-21 14:45:08 UTC ---
Created attachment 22836
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22836
gcc46-pr46880.patch
Untested fix. In both of these insns, for the shufpd $2 alternative %2 operand
uses constraint 0 while %1 operand uses constraint x. So, using shuftpd $2,
%2, %0 looks wrong, because that will never look at the other operand,
shuftpd $2, %0, %0 is IMHO a nop.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/46880] [4.4/4.5/4.6 Regression] generating of shufpd is broken
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
` (5 preceding siblings ...)
2010-12-21 14:45 ` jakub at gcc dot gnu.org
@ 2010-12-21 22:37 ` jakub at gcc dot gnu.org
2010-12-21 22:39 ` [Bug target/46880] [4.4/4.5 " jakub at gcc dot gnu.org
` (4 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: jakub at gcc dot gnu.org @ 2010-12-21 22:37 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-21 22:37:30 UTC ---
Author: jakub
Date: Tue Dec 21 22:37:23 2010
New Revision: 168135
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=168135
Log:
PR target/46880
* config/i386/sse.md (sse2_loadlpd, sse2_movsd): Fix shufpd source
operand.
* gcc.target/i386/pr46880.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr46880.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/46880] [4.4/4.5 Regression] generating of shufpd is broken
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
` (6 preceding siblings ...)
2010-12-21 22:37 ` jakub at gcc dot gnu.org
@ 2010-12-21 22:39 ` jakub at gcc dot gnu.org
2011-01-16 20:32 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: jakub at gcc dot gnu.org @ 2010-12-21 22:39 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.6.0
Summary|[4.4/4.5/4.6 Regression] |[4.4/4.5 Regression]
|generating of shufpd is |generating of shufpd is
|broken |broken
Known to fail|4.6.0 |
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-21 22:39:26 UTC ---
Fixed on the trunk so far.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/46880] [4.4/4.5 Regression] generating of shufpd is broken
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
` (7 preceding siblings ...)
2010-12-21 22:39 ` [Bug target/46880] [4.4/4.5 " jakub at gcc dot gnu.org
@ 2011-01-16 20:32 ` jakub at gcc dot gnu.org
2011-01-17 0:38 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-16 20:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-16 20:25:04 UTC ---
Author: jakub
Date: Sun Jan 16 20:25:01 2011
New Revision: 168868
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=168868
Log:
Backport from mainline
2010-12-21 Jakub Jelinek <jakub@redhat.com>
PR target/46880
* config/i386/sse.md (sse2_loadlpd, sse2_movsd): Fix shufpd source
operand.
* gcc.target/i386/pr46880.c: New test.
Added:
branches/gcc-4_5-branch/gcc/testsuite/gcc.target/i386/pr46880.c
Modified:
branches/gcc-4_5-branch/gcc/ChangeLog
branches/gcc-4_5-branch/gcc/config/i386/sse.md
branches/gcc-4_5-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/46880] [4.4/4.5 Regression] generating of shufpd is broken
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
` (8 preceding siblings ...)
2011-01-16 20:32 ` jakub at gcc dot gnu.org
@ 2011-01-17 0:38 ` jakub at gcc dot gnu.org
2011-01-17 8:05 ` jakub at gcc dot gnu.org
2011-01-17 12:06 ` rguenth at gcc dot gnu.org
11 siblings, 0 replies; 13+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-17 0:38 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-16 22:57:44 UTC ---
Author: jakub
Date: Sun Jan 16 22:57:42 2011
New Revision: 168880
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=168880
Log:
Backport from mainline
2010-12-21 Jakub Jelinek <jakub@redhat.com>
PR target/46880
* config/i386/sse.md (sse2_loadlpd, sse2_movsd): Fix shufpd source
operand.
* gcc.target/i386/pr46880.c: New test.
Added:
branches/gcc-4_4-branch/gcc/testsuite/gcc.target/i386/pr46880.c
Modified:
branches/gcc-4_4-branch/gcc/ChangeLog
branches/gcc-4_4-branch/gcc/config/i386/sse.md
branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/46880] [4.4/4.5 Regression] generating of shufpd is broken
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
` (9 preceding siblings ...)
2011-01-17 0:38 ` jakub at gcc dot gnu.org
@ 2011-01-17 8:05 ` jakub at gcc dot gnu.org
2011-01-17 12:06 ` rguenth at gcc dot gnu.org
11 siblings, 0 replies; 13+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-17 8:05 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-17 08:01:17 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/46880] [4.4/4.5 Regression] generating of shufpd is broken
2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
` (10 preceding siblings ...)
2011-01-17 8:05 ` jakub at gcc dot gnu.org
@ 2011-01-17 12:06 ` rguenth at gcc dot gnu.org
11 siblings, 0 replies; 13+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-01-17 12:06 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.4.6, 4.5.3
Target Milestone|4.6.0 |4.4.6
Known to fail|4.4.6 |4.4.5
^ permalink raw reply [flat|nested] 13+ messages in thread
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2010-12-10 2:23 [Bug tree-optimization/46880] New: [4.6 Regression] g++.dg/other/pr40446.C FAILs with custom flags zsojka at seznam dot cz
2010-12-10 13:26 ` [Bug tree-optimization/46880] " rguenth at gcc dot gnu.org
2010-12-18 21:33 ` zsojka at seznam dot cz
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2010-12-18 23:17 ` hjl.tools at gmail dot com
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2010-12-21 22:37 ` jakub at gcc dot gnu.org
2010-12-21 22:39 ` [Bug target/46880] [4.4/4.5 " jakub at gcc dot gnu.org
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