[Bug middle-end/46185] New: [4.6 Regression] gcc.dg/graphite/interchange-4.c FAILs with -fno-ipa-cp

[Bug middle-end/46185] New: [4.6 Regression] gcc.dg/graphite/interchange-4.c FAILs with -fno-ipa-cp

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46185

           Summary: [4.6 Regression] gcc.dg/graphite/interchange-4.c FAILs
                    with -fno-ipa-cp
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Output (with #define DEBUG 1):
$ gcc -O2 -floop-interchange -ffast-math interchange-4.c && ./a.out
res = 3565793
$ gcc -O2 -floop-interchange -ffast-math interchange-4.c -fno-ipa-cp && ./a.out
res = 1343 
Aborted
$ gcc -O1 -floop-interchange -ffast-math interchange-4.c && ./a.out
res = 1343 
Aborted

The same effect can be achieved by adding attribute noclone to foo().

Tested revisions:
r165915 - fail
r163636 - fail
r161659 - OK

[Bug middle-end/46185] [4.6 Regression] gcc.dg/graphite/interchange-4.c FAILs with -fno-ipa-cp

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46185

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2010.10.26 18:18:54
     Ever Confirmed|0                           |1

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2010-10-26 18:18:54 UTC ---
It is caused by revision 163159:

http://gcc.gnu.org/ml/gcc-cvs/2010-08/msg00370.html

[Bug middle-end/46185] [4.6 Regression] gcc.dg/graphite/interchange-4.c FAILs with -fno-ipa-cp

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46185

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.6.0

[Bug middle-end/46185] [4.6 Regression] gcc.dg/graphite/interchange-4.c FAILs with -fno-ipa-cp

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46185

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2
                 CC|                            |jakub at gcc dot gnu.org

[Bug middle-end/46185] [4.6 Regression] gcc.dg/graphite/interchange-4.c FAILs with -fno-ipa-cp

[spop at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46185

Sebastian Pop <spop at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #2 from Sebastian Pop <spop at gcc dot gnu.org> 2010-12-06 22:47:00 UTC ---
git bisect points out that this was fixed by:
http://gcc.gnu.org/viewcvs?view=revision&revision=167347

[Bug middle-end/46185] [4.6 Regression] gcc.dg/graphite/interchange-4.c FAILs with -fno-ipa-cp

[hjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46185

--- Comment #3 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> 2010-12-07 01:29:14 UTC ---
Author: hjl
Date: Tue Dec  7 01:29:10 2010
New Revision: 167527

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=167527
Log:
Add testcases for PRs middle-end/41562 and middle-end/46185.

2010-12-06  H.J. Lu  <hongjiu.lu@intel.com>

    PR middle-end/41562
    * g++.dg/graphite/pr41562.C: New.

    PR middle-end/46185
    * gcc.dg/graphite/pr46185.c: New.

Added:
    trunk/gcc/testsuite/g++.dg/graphite/pr41562.C
    trunk/gcc/testsuite/gcc.dg/graphite/pr46185.c
Modified:
    trunk/gcc/testsuite/ChangeLog

[Bug middle-end/46185] [4.6 Regression] gcc.dg/graphite/interchange-4.c FAILs with -fno-ipa-cp

[spop at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46185

--- Comment #4 from Sebastian Pop <spop at gcc dot gnu.org> 2010-12-07 04:30:48 UTC ---
I forgot to add the testcase.  Next time I will add it before closing the bug.