[PATCH] D62786: [X86] X86DAGToDAGISel::matchBitExtract(): pattern a: truncation awareness

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri updated this revision to Diff 202588.
lebedev.ri added a comment.

Don't peek through truncation of 'X' if we have BMI2.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62786/new/

https://reviews.llvm.org/D62786

Files:
  lib/Target/X86/X86ISelDAGToDAG.cpp
  test/CodeGen/X86/extract-bits.ll
  test/CodeGen/X86/extract-lowbits.ll

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