[x86, InstCombine] delete x86 SSE2 masked store with zero mask

This follows up on the related AVX instruction transforms, but this
one is too strange to do anything more with. Intel's behavioral
description of this instruction in its Software Developer's Manual
is tragi-comic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263340 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed