[Bug tree-optimization/49199] New: [4.7 Regression] ICE: in vect_create_epilog_for_reduction at tree-vect-loop.c:3445 with -O -fno-tree-scev-cprop -ftree-vectorize -funswitch-loops

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49199

           Summary: [4.7 Regression] ICE: in
                    vect_create_epilog_for_reduction at
                    tree-vect-loop.c:3445 with -O -fno-tree-scev-cprop
                    -ftree-vectorize -funswitch-loops
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: zso...@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 24378
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24378
reduced testcase

Compiler output:
$ gcc -O -fno-tree-scev-cprop -ftree-vectorize -funswitch-loops testcase.c 
testcase.c: In function 'foo':
testcase.c:4:5: internal compiler error: vector VEC(tree,base) index domain
error, in vect_create_epilog_for_reduction at tree-vect-loop.c:3445
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r174319 - crash
4.6 r173059 - OK