[Bug tree-optimization/36630] New: [4.3/4.4 Regression] ICE in vect_update_ivs_after_vectorizer

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

void
foo (unsigned char *x, short y)
{
  short i;

  i = 2;
  while (i < y)
    {
      x[i - 1] = x[i];
      i = i + 1;
    }
}

ICEs at -O3 on x86_64-linux in 4.3/4.4, works in 4.2 with -O3 -ftree-vectorize.


-- 
           Summary: [4.3/4.4 Regression] ICE in
                    vect_update_ivs_after_vectorizer
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org
GCC target triplet: x86_64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36630