[Bug middle-end/46885] New: [4.6 Regression] ICE: in gsi_insert_seq_nodes_after, at gimple-iterator.c:251 with -ftree-parallelize-loops -g

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46885

           Summary: [4.6 Regression] ICE: in gsi_insert_seq_nodes_after,
                    at gimple-iterator.c:251 with -ftree-parallelize-loops
                    -g
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: zso...@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 22706
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22706
reduced testcase

Compiler output:
$ gcc -O -ftree-parallelize-loops=4 -g -fno-tree-dominator-opts
-funswitch-loops pr46885.c 
pr46885.c: In function 'foo':
pr46885.c:8:1: internal compiler error: in gsi_insert_seq_nodes_after, at
gimple-iterator.c:251
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r167643 - crash
r161659 - crash
r158095 - OK
4.5 r166509 - OK