[Bug tree-optimization/49771] New: [4.7 Regression] wrong code with -ftree-vectorize

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49771

           Summary: [4.7 Regression] wrong code with -ftree-vectorize
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 24783
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24783
reduced testcase (from gcc.dg/graphite/block-0.c)

Output:
$ gcc -O -ftree-vectorize testcase.c
$ ./a.out 
Aborted
$ gcc -O3 testcase.c
$ ./a.out 
Aborted

Tested revisions:
r176370 - fail
4.6 r176280 - OK