[PATCH] D22933: DAG: avoid truncating a sign extended operand when test equality against zero

[Weiming Zhao via llvm-commits]

weimingz updated this revision to Diff 66191.
weimingz added a comment.

Thanks Eli for reviewing.
Is the tool for x86 only?

Anyway, I added some reg exp to let the CHECK rule be more generic


Repository:
  rL LLVM

https://reviews.llvm.org/D22933

Files:
  lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
  test/CodeGen/AArch64/arm64-shrink-wrapping.ll
  test/CodeGen/ARM/arm-shrink-wrapping.ll
  test/CodeGen/ARM/no_redundant_trunc_for_cmp.ll
  test/CodeGen/PowerPC/ppc-shrink-wrapping.ll
  test/CodeGen/Thumb/thumb-shrink-wrapping.ll

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