[PATCH] D38161: [X86] Improve codegen for inverted overflow checking intrinsics

[Amara Emerson via Phabricator via llvm-commits]

aemerson created this revision.
Herald added a subscriber: kristof.beyls.

[X86] Improve codegen for inverted overflow checking intrinsics.

Adds a new combine for: xor(setcc cc, val), 1 --> setcc (invert(cc), val)

This is the same optimization as the one for AArch64 in https://reviews.llvm.org/D38160 but implemented in a different way.


Repository:
  rL LLVM

https://reviews.llvm.org/D38161

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/overflow-intrinsic-setcc-fold.ll

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