[PATCH] [X86][SSE] Missing SSE/AVX1 memory folding integer instructions

[Quentin Colombet]

> Sure I can simplify psubus.ll tests - do you want it as part of this patch?


No, a follow-up patch is fine.

> We do already have the proper stack folding tests for (v)psubusb as well of course.


LGTM then :).

Thanks,
-Quentin


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http://reviews.llvm.org/D7094

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