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Subject: [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
Date: Thu, 11 Oct 2012 12:23:00 -0000
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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.