[Bug tree-optimization/63778] New: Segfault with r217178 building 416.gamess from cpu2006

[pthaugen at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63778

            Bug ID: 63778
           Summary: Segfault with r217178 building 416.gamess from cpu2006
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pthaugen at gcc dot gnu.org
                CC: bergner at gcc dot gnu.org, dje.gcc at gmail dot com,
                    rguenth at gcc dot gnu.org
              Host: powerpc64-unknown-linux-gnu
            Target: powerpc64-unknown-linux-gnu
             Build: powerpc64-unknown-linux-gnu

Created attachment 33920
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33920&action=edit
reduced testcase

Following segfault started with r217178.

> gfortran -c -O3 -ffast-math zheev.f
...
f951: internal compiler error: Segmentation fault
0x107ac467 crash_signal
    /home/pthaugen/src/gcc/trunk/gcc/gcc/toplev.c:358
0x1050ec44 gimple_code
    /home/pthaugen/src/gcc/trunk/gcc/gcc/gimple.h:1412
0x1050ec44 is_gimple_assign
    /home/pthaugen/src/gcc/trunk/gcc/gcc/gimple.h:2124
0x1050ec44 gimple_simplify
    /home/pthaugen/work/build/gcc/trunk/gcc/gimple-match.c:493
0x1050e587 gimple_resimplify1
    /home/pthaugen/src/gcc/trunk/gcc/gcc/gimple-match-head.c:125
0x10507cbb fold_stmt_1
    /home/pthaugen/src/gcc/trunk/gcc/gcc/gimple-fold.c:3074
...