[Bug tree-optimization/50208] New: ICE: in vinfo_for_stmt at tree-vectorizer.h:598 with -ftree-vectorize -fno-tree-fre -fno-tree-pre

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50208

             Bug #: 50208
           Summary: ICE: in vinfo_for_stmt at tree-vectorizer.h:598 with
                    -ftree-vectorize -fno-tree-fre -fno-tree-pre
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: zso...@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 25117
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25117
reduced testcase

Compiler output:
$ gcc -O2 -ftree-vectorize -fno-tree-fre -fno-tree-pre testcase.c         
testcase.c: In function 'foo':
testcase.c:4:6: internal compiler error: vector VEC(vec_void_p,base) index
domain error, in vinfo_for_stmt at tree-vectorizer.h:598
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

The testcase was reduced from the PR50039 testcase.

Tested revisions:
r178096 - crash
r177913 - crash
r177543 - OK