[Bug tree-optimization/46177] New: [4.5/4.6 Regression] ICE: in prop_phis, at tree-loop-distribution.c:327 with -fno-tree-copy-prop -ftree-loop-distribution

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46177

           Summary: [4.5/4.6 Regression] ICE: in prop_phis, at
                    tree-loop-distribution.c:327 with -fno-tree-copy-prop
                    -ftree-loop-distribution
           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 22155
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22155
reduced testcase

Compiler output:
$ gcc -O -fno-tree-copy-prop -ftree-loop-distribution pr46177.c 
pr46177.c: In function 'foo':
pr46177.c:5:1: internal compiler error: in prop_phis, at
tree-loop-distribution.c:327
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Fails with -O3 -fno-tree-copy-prop as well as it implies
-ftree-loop-distribute-patterns

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