[PATCH] D20931: [X86] Reduce the width of multiplification when its operands are extended from i8 or i16

[Wei Mi via llvm-commits]

wmi updated this revision to Diff 60628.

Repository:
  rL LLVM

http://reviews.llvm.org/D20931

Files:
  lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/shrink_vmul.ll

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