[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 #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-10-11 
12:33:41 UTC ---

I'd say the problem is that useless_type_conversion_p considers the overaligned

double type compatible to double, yet get_vectype_for_scalar_type returns

non-NULL for the normally aligned one and NULL for the overaligned one.

During vectorizer analysis phase, we assume it is enough to call that function

just for a single type for the stmt, not check all 3 types, that succeeds, but

during transform phase we call it on all 3 and ICE.