[PATCH] D25910: [VectorLegalizer] Expansion of CTLZ using CTPOP when possible

[Simon Pilgrim via llvm-commits]

RKSimon updated this revision to Diff 76300.
RKSimon added a comment.

Simplified ExpandCTTZ_ZERO_UNDEF since we know its ISD::CTTZ_ZERO_UNDEF - thanks Craig


Repository:
  rL LLVM

https://reviews.llvm.org/D25910

Files:
  lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
  lib/Target/X86/X86TargetTransformInfo.cpp
  test/Analysis/CostModel/X86/ctbits-cost.ll
  test/CodeGen/X86/vec_ctbits.ll
  test/CodeGen/X86/vector-lzcnt-128.ll
  test/Transforms/SLPVectorizer/X86/ctlz.ll

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