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* [Bug tree-optimization/55236] New: [4.8 Regression] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC
@ 2012-11-07 21:10 zsojka at seznam dot cz
2012-11-08 16:18 ` [Bug tree-optimization/55236] " jakub at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: zsojka at seznam dot cz @ 2012-11-07 21:10 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55236
Bug #: 55236
Summary: [4.8 Regression] gcc.c-torture/execute/pr22493-1.c
FAILs with -fPIC
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: zsojka@seznam.cz
Created attachment 28631
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28631
testcase (gcc.c-torture/execute/pr22493-1.c)
Output:
$ gcc -O2 -fPIC -fwrapv testcase.c
$ ./a.out
Aborted
The problem seems to be that f() is optimised just to abort().
In the -fPIC case, f() is called, and the program aborts.
Without -fPIC, f() is not called, so the program doesn't abort - though the
body of f() is reduced to just abort() as well.
Tested revisions:
r193182 - FAIL
4.7 r191640 - OK
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/55236] [4.8 Regression] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC
2012-11-07 21:10 [Bug tree-optimization/55236] New: [4.8 Regression] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC zsojka at seznam dot cz
@ 2012-11-08 16:18 ` jakub at gcc dot gnu.org
2012-11-17 22:00 ` jakub at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-11-08 16:18 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55236
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2012-11-08
AssignedTo|unassigned at gcc dot |jakub at gcc dot gnu.org
|gnu.org |
Ever Confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-08 16:18:08 UTC ---
Created attachment 28636
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28636
gcc48-pr55236.patch
Started with my inter-bb range test optimization, but as the attached testcase
shows, if written in a single stmt, even gcc 3.4 miscompiles it.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/55236] [4.8 Regression] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC
2012-11-07 21:10 [Bug tree-optimization/55236] New: [4.8 Regression] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC zsojka at seznam dot cz
2012-11-08 16:18 ` [Bug tree-optimization/55236] " jakub at gcc dot gnu.org
@ 2012-11-17 22:00 ` jakub at gcc dot gnu.org
2012-11-19 9:39 ` [Bug tree-optimization/55236] " jakub at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-11-17 22:00 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55236
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-17 22:00:37 UTC ---
Author: jakub
Date: Sat Nov 17 22:00:32 2012
New Revision: 193591
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193591
Log:
PR tree-optimization/55236
* fold-const.c (make_range_step) <case NEGATE_EXPR>: For -fwrapv
and signed ARG0_TYPE, force low and high to be non-NULL.
* gcc.dg/pr55236.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr55236.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/55236] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC
2012-11-07 21:10 [Bug tree-optimization/55236] New: [4.8 Regression] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC zsojka at seznam dot cz
2012-11-08 16:18 ` [Bug tree-optimization/55236] " jakub at gcc dot gnu.org
2012-11-17 22:00 ` jakub at gcc dot gnu.org
@ 2012-11-19 9:39 ` jakub at gcc dot gnu.org
2013-01-07 10:07 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-11-19 9:39 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55236
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.8.0
Summary|[4.8 Regression] |gcc.c-torture/execute/pr224
|gcc.c-torture/execute/pr224 |93-1.c FAILs with -fPIC
|93-1.c FAILs with -fPIC |
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-19 09:38:45 UTC ---
Fixed on the trunk so far, the branches still miscompile the testcase.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/55236] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC
2012-11-07 21:10 [Bug tree-optimization/55236] New: [4.8 Regression] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC zsojka at seznam dot cz
` (2 preceding siblings ...)
2012-11-19 9:39 ` [Bug tree-optimization/55236] " jakub at gcc dot gnu.org
@ 2013-01-07 10:07 ` rguenth at gcc dot gnu.org
2013-02-01 13:59 ` jakub at gcc dot gnu.org
2013-02-01 14:24 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-01-07 10:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55236
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |xi.wang at gmail dot com
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> 2013-01-07 10:06:31 UTC ---
*** Bug 55883 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/55236] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC
2012-11-07 21:10 [Bug tree-optimization/55236] New: [4.8 Regression] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC zsojka at seznam dot cz
` (3 preceding siblings ...)
2013-01-07 10:07 ` rguenth at gcc dot gnu.org
@ 2013-02-01 13:59 ` jakub at gcc dot gnu.org
2013-02-01 14:24 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2013-02-01 13:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55236
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-02-01 13:58:58 UTC ---
Author: jakub
Date: Fri Feb 1 13:58:55 2013
New Revision: 195649
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195649
Log:
Backported from mainline
2012-11-17 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/55236
* fold-const.c (make_range_step) <case NEGATE_EXPR>: For -fwrapv
and signed ARG0_TYPE, force low and high to be non-NULL.
* gcc.dg/pr55236.c: New test.
Added:
branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/pr55236.c
Modified:
branches/gcc-4_7-branch/gcc/ChangeLog
branches/gcc-4_7-branch/gcc/fold-const.c
branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/55236] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC
2012-11-07 21:10 [Bug tree-optimization/55236] New: [4.8 Regression] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC zsojka at seznam dot cz
` (4 preceding siblings ...)
2013-02-01 13:59 ` jakub at gcc dot gnu.org
@ 2013-02-01 14:24 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2013-02-01 14:24 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55236
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-02-01 14:23:57 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 7+ messages in thread
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2012-11-07 21:10 [Bug tree-optimization/55236] New: [4.8 Regression] gcc.c-torture/execute/pr22493-1.c FAILs with -fPIC zsojka at seznam dot cz
2012-11-08 16:18 ` [Bug tree-optimization/55236] " jakub at gcc dot gnu.org
2012-11-17 22:00 ` jakub at gcc dot gnu.org
2012-11-19 9:39 ` [Bug tree-optimization/55236] " jakub at gcc dot gnu.org
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