[Bug rtl-optimization/57304] New: Revision 198896 segfaults building cpu2000 benchmark 176.gcc

[pthaugen at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57304

            Bug ID: 57304
           Summary: Revision 198896 segfaults building cpu2000 benchmark
                    176.gcc
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pthaugen at gcc dot gnu.org
                CC: bergner at gcc dot gnu.org, mikestump at comcast dot net
              Host: powerpc64-linux
            Target: powerpc64-linux
             Build: powerpc64-linux

Created attachment 30133
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30133&action=edit
Reduced testcase

Started with r198896.

$ ~/install/gcc/trunk/bin/gcc -c -m64 -fno-strict-aliasing -O3 -mcpu=power7
-funroll-loops c-parse.c
c-parse.c: In function ‘yyparse’:
c-parse.c:14:2: internal compiler error: Segmentation fault
  }
  ^
0x105e29b7 crash_signal
    /home/pthaugen/src/gcc/trunk/gcc/gcc/toplev.c:333
0x108ab18c union_match_dups
    /home/pthaugen/src/gcc/trunk/gcc/gcc/web.c:138
0x108ab18c web_main
    /home/pthaugen/src/gcc/trunk/gcc/gcc/web.c:387
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