[Bug tree-optimization/46194] New: [4.5/4.6 Regression] gcc.dg/graphite/block-0.c FAILs with -ftree-parallelize-loops

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46194

           Summary: [4.5/4.6 Regression] gcc.dg/graphite/block-0.c FAILs
                    with -ftree-parallelize-loops
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Graphite is not needed to reproduce this. The output value looks "random", it
differs in different runs.

Output (with #define DEBUG 1):
$ gcc -O -ftree-parallelize-loops=2 block-0.c && ./a.out 
res = 2155 
Aborted
$ ./a.out 
res = 2156 
Aborted
$ ./a.out 
res = 2201 
Aborted

Tested revisions:
r165915 - fail
r153685 - fail
4.5 r165781 - fail
4.4 r165754 - OK