Simon Pilgrim fda22d66fc [InstCombine][MMX] Extend SimplifyDemandedUseBits MOVMSK support to MMX ...

Add the MMX implementation to the SimplifyDemandedUseBits SSE/AVX MOVMSK support added in D19614

Requires a minor tweak as llvm.x86.mmx.pmovmskb takes a x86_mmx argument - so we have to be explicit about the implied v8i8 vector type.

llvm-svn: 271789

2016-06-04 13:42:46 +00:00

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