[Bug c/26643] New: Linux matroxfb_probe miscompiled

["olh at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

This testcase does not return 0 on powerpc64-suse-linux and s390x-suse-linux
with compiled with -O1
but it does with -O0.
I tried all the new opts from -O0 to -O1, but adding them all to -O0 does not
fix it. No idea why.

flags='  -O1'
gcc -Wall -c -o /tmp/main.o /tmp/main.c $flags
gcc -Wall -c -o /tmp/matroxfb_probe.o /tmp/matroxfb_probe.c $flags
gcc -Wall -o /tmp/matroxfb_probe  /tmp/main.o /tmp/matroxfb_probe.o $flags
/tmp/matroxfb_probe


-- 
           Summary: Linux matroxfb_probe miscompiled
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: olh at suse dot de
 GCC build triplet: powerpc64-linux
  GCC host triplet: powerpc64-linux
GCC target triplet: powerpc64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26643