[Bug middle-end/55456] New: [4.8 Regression] 454.calculix in SPEC CPU 2006 is miscompiled

[Bug middle-end/55456] New: [4.8 Regression] 454.calculix in SPEC CPU 2006 is miscompiled

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55456

             Bug #: 55456
           Summary: [4.8 Regression] 454.calculix in SPEC CPU 2006 is
                    miscompiled
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com
                CC: areg.melikadamyan@gmail.com


On Linux/i686, revision 193723 miscompiled
454.calculix in SPEC CPU 2006 with

-O3 -funroll-loops -msse2 -mfpmath=sse -ffast-math -ffixed-form 

454.calculix is compiled into an infinite loop.

[Bug middle-end/55456] [4.8 Regression] 454.calculix in SPEC CPU 2006 is miscompiled

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55456

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vmakarov at redhat dot com
   Target Milestone|---                         |4.8.0

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2012-11-24 06:58:38 UTC ---
It is caused by revision 193310:

http://gcc.gnu.org/ml/gcc-cvs/2012-11/msg00257.html

[Bug middle-end/55456] [4.8 Regression] 454.calculix in SPEC CPU 2006 is miscompiled

[vmakarov at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55456

--- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> 2012-11-29 19:00:49 UTC ---
Author: vmakarov
Date: Thu Nov 29 19:00:38 2012
New Revision: 193948

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193948
Log:
2012-11-29  Vladimir Makarov  <vmakarov@redhat.com>

    PR middle-end/55456
    * lra-int.h (lra_new_regno_start): New external.
    * lra.c (lra_new_regno_start): New global.
    (lra): Set up lra_new_regno_start.
    * lra-constraints.c (match_reload): Sync values only for original
    pseudos.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/lra-constraints.c
    trunk/gcc/lra-int.h
    trunk/gcc/lra.c

[Bug middle-end/55456] [4.8 Regression] 454.calculix in SPEC CPU 2006 is miscompiled

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55456

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

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

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-07 10:28:06 UTC ---
Fixed.