[Bug tree-optimization/54894] [4.6/4.7/4.8 Regression] internal compiler error: in vect_get_vec_def_for_operand, at tree-vect-stmts.c:1286

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54894



--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-10-11 
12:22:47 UTC ---

You should be using __builtin_assume_aligned builtin, i.e.

  double *Ap = __builtin_assume_aligned (&A[ih+il][kh], 16);

instead of the hacks with the overaligned scalar pointer, that doesn't improve

vectorization, but actually prohibits it.  That said, of course gcc shouldn't

ICE on this.