[Bug tree-optimization/68460] New: ICE in init_stmt_vec_info_vec with -ftree-vectorize and -ftree-parallelize-loops

["vries at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68460

            Bug ID: 68460
           Summary: ICE in init_stmt_vec_info_vec with -ftree-vectorize
                    and -ftree-parallelize-loops
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

...
$ gcc src/libgomp/testsuite/libgomp.c/pr46886.c -ftree-vectorize -O
-ftree-parallelize-loops=4 -fno-tree-ch -fno-tree-dominator-opts -S
src/libgomp/testsuite/libgomp.c/pr46886.c: In function âfooâ:
src/libgomp/testsuite/libgomp.c/pr46886.c:8:5: internal compiler error: in
init_stmt_vec_info_vec, at tree-vect-stmts.c:8250
 int foo (void)
     ^~~

0x1196082 init_stmt_vec_info_vec()
        src/gcc/tree-vect-stmts.c:8250
0x11c3ed4 vectorize_loops()
        src/gcc/tree-vectorizer.c:510
0x10a7ea5 execute
        src/gcc/tree-ssa-loop.c:276
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...