Hi All,

Here is a simple patch which removes restriction on outer-loop
vectorization -  allow references in inner-loop with zero step. This
case was found in one important benchmark.

Bootstrap and regression testing did not show any new failures.
Is it OK for trunk.

ChangeLog:
2015-05-28  Yuri Rumyantsev  <ysrumyan@gmail.com>

* tree-vect-data-refs.c (vect_analyze_data_ref_access): Allow
consecutive accesses within outer-loop vectorization for references
with zero step in inner-loop.

gcc/testsuite/ChangeLog:
* gcc.dg/vect/fast-math-vect-outer-1.c: New test.