[PATCH] [x86] instcombine more cases of insertps into a shufflevector

[Sanjay Patel]

Thanks, Simon!

Patch updated:
I had the zmask override in my sites, but I didn't recognize that it was just going to be one more check in the 'if'. :)
Added test case to verify the zmask override even with 2 different input vectors.


http://reviews.llvm.org/D9257

Files:
  lib/Transforms/InstCombine/InstCombineCalls.cpp
  test/Transforms/InstCombine/x86-insertps.ll

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