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* [Bug bootstrap/47187] New: [4.6 Regression] profiledbootstrap failure on i386
@ 2011-01-06 10:07 jakub at gcc dot gnu.org
2011-01-06 10:16 ` [Bug bootstrap/47187] " jakub at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-06 10:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47187
Summary: [4.6 Regression] profiledbootstrap failure on i386
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: jakub@gcc.gnu.org
profiledbootstrap currently fails on i386, with --enable-checking=release rtl.c
(copy_rtx) is miscompiled (after giving a bogus warning that copy is
uninitialized (well, in the generated code it is), with checking it ICEs:
../../gcc/rtl.c: In function ‘copy_rtx’:
../../gcc/rtl.c:236:1: error: SSA_NAME_DEF_STMT is wrong
Expected definition statement:
# .MEM_93 = VDEF <.MEM_91>
D.27976_89 = memcpy (copy.26_86, orig.25_85, 12);
Actual definition statement:
# .MEM_92 = VDEF <.MEM_91>
D.27976_89 = memcpy (copy.26_86, orig.25_85, D.27973_83);
../../gcc/rtl.c:236:1: internal compiler error: verify_ssa failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
This is caused by a bug in gimple_stringop_fixed_value where it doesn't handle
lhs properly. Small testcase:
char buf[64];
char buf2[64];
void *
foo (char *p, long size)
{
return __builtin_memcpy (buf, p, size);
}
int
main (void)
{
long i;
for (i = 0; i < 65536; i++)
if (foo ("abcdefghijkl", 12) != buf)
__builtin_abort ();
if (foo (buf2, 64) != buf)
__builtin_abort ();
return 0;
}
./xgcc -B ./ -O2 -fprofile-generate test.c -o test
./test
./xgcc -B ./ -O2 -fprofile-use test.c -o test
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug bootstrap/47187] [4.6 Regression] profiledbootstrap failure on i386
2011-01-06 10:07 [Bug bootstrap/47187] New: [4.6 Regression] profiledbootstrap failure on i386 jakub at gcc dot gnu.org
@ 2011-01-06 10:16 ` jakub at gcc dot gnu.org
2011-01-06 11:03 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-06 10:16 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47187
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |ASSIGNED
Keywords| |ice-checking, wrong-code
Last reconfirmed| |2011.01.06 10:06:53
AssignedTo|unassigned at gcc dot |jakub at gcc dot gnu.org
|gnu.org |
Ever Confirmed|0 |1
Target Milestone|--- |4.6.0
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-06 10:06:53 UTC ---
I'll take care of it.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug bootstrap/47187] [4.6 Regression] profiledbootstrap failure on i386
2011-01-06 10:07 [Bug bootstrap/47187] New: [4.6 Regression] profiledbootstrap failure on i386 jakub at gcc dot gnu.org
2011-01-06 10:16 ` [Bug bootstrap/47187] " jakub at gcc dot gnu.org
@ 2011-01-06 11:03 ` jakub at gcc dot gnu.org
2011-01-07 18:43 ` jakub at gcc dot gnu.org
2011-01-07 19:16 ` jakub at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-06 11:03 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47187
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-06 10:29:49 UTC ---
Created attachment 22911
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22911
gcc46-pr47187.patch
Very lightly tested fix.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug bootstrap/47187] [4.6 Regression] profiledbootstrap failure on i386
2011-01-06 10:07 [Bug bootstrap/47187] New: [4.6 Regression] profiledbootstrap failure on i386 jakub at gcc dot gnu.org
2011-01-06 10:16 ` [Bug bootstrap/47187] " jakub at gcc dot gnu.org
2011-01-06 11:03 ` jakub at gcc dot gnu.org
@ 2011-01-07 18:43 ` jakub at gcc dot gnu.org
2011-01-07 19:16 ` jakub at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-07 18:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47187
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-07 18:39:14 UTC ---
Author: jakub
Date: Fri Jan 7 18:39:11 2011
New Revision: 168581
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=168581
Log:
PR bootstrap/47187
* value-prof.c (gimple_stringop_fixed_value): Handle
lhs of the call properly.
* gcc.dg/tree-prof/pr47187.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-prof/pr47187.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/value-prof.c
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug bootstrap/47187] [4.6 Regression] profiledbootstrap failure on i386
2011-01-06 10:07 [Bug bootstrap/47187] New: [4.6 Regression] profiledbootstrap failure on i386 jakub at gcc dot gnu.org
` (2 preceding siblings ...)
2011-01-07 18:43 ` jakub at gcc dot gnu.org
@ 2011-01-07 19:16 ` jakub at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-07 19:16 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47187
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-07 18:44:16 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2011-01-06 10:07 [Bug bootstrap/47187] New: [4.6 Regression] profiledbootstrap failure on i386 jakub at gcc dot gnu.org
2011-01-06 10:16 ` [Bug bootstrap/47187] " jakub at gcc dot gnu.org
2011-01-06 11:03 ` jakub at gcc dot gnu.org
2011-01-07 18:43 ` jakub at gcc dot gnu.org
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