[PATCH] [x86] Make vector legalization of extloads work more like the "normal" vector operation legalization with support for custom target lowering and fallback to expand when it fails, and use this to implement sext and anyext load lowering for x86 in a...

[Chandler Carruth]

I've made the requested changes. I can post a patch if you'd like to see another version (but the delta is completely unsurprising). Any further comments here?

http://reviews.llvm.org/D4654