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Subject: [Bug tree-optimization/42644]  New: wrong code for -fgraphite-identify in 183.equake
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From: "janis at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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Test 183.equake from SPEC CPU2000 gets wrong results on powerpc64-linux (-m32
or -m64) when compiled with either "-O2 -fgraphite-identity" or "-O2
-floop-parallelize-all".  I'll attach an executable testcase that demonstrates
the failure.  Test 178.galgel fails with the same options but I haven't
investigated it.

The failure starts with the merge from the Graphite branch for r150301.  With
options "-O2 -fgraphite-identity" the minimized testcase and the two CPU2000
tests pass with r150248, the last revision before that merge that builds on
powerpc64-linux.  They also pass with GCC 4.4.2 with "-O2 -fgraphite-identity".


-- 
           Summary: wrong code for -fgraphite-identify in 183.equake
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42644