[Bug tree-optimization/46066] New: [4.6 Regression] ICE: in create_parallel_loop, at tree-parloops.c:1455 with -ftree-parallelize-loops -g

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46066

           Summary: [4.6 Regression] ICE: in create_parallel_loop, at
                    tree-parloops.c:1455 with -ftree-parallelize-loops -g
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: zso...@seznam.cz


Created attachment 22076
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22076
reduced testcase (almost the same as gcc.dg/autopar/outer-2.c)

Compiler output:
$ gcc -O -ftree-parallelize-loops=4 -g pr46066.c 
pr46066.c: In function 'parloop':
pr46066.c:2:1: internal compiler error: in create_parallel_loop, at
tree-parloops.c:1455
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

fails with -ftree-parallelize-loops=[234]

Tested revisions:
r165629 - crash
r161659 - crash
r159696 - OK
4.5 r163761 - OK