[Bug tree-optimization/55334] [4.8/4.9/5 Regression] mgrid regression (ipa-cp disables vectorization)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55334

--- Comment #41 from Richard Biener <rguenth at gcc dot gnu.org> ---
New attempt: https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00232.html