[PATCH] D38305: [X86] Use BWI instructions to improve lowering of v32i8 MULHU/S

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.

If we have BWI instructions we can widen to v32i16 to do the multiply instead of splitting.


https://reviews.llvm.org/D38305

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/vector-idiv-sdiv-256.ll
  test/CodeGen/X86/vector-idiv-udiv-256.ll

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