[PATCH] D149689: [X86] Lower used `(atomicrmw xor p, SignBit)` as `(atomicrmw add p, SignBit)`

[Noah Goldstein via Phabricator via llvm-commits]

goldstein.w.n updated this revision to Diff 519231.
goldstein.w.n marked an inline comment as done.
goldstein.w.n added a comment.

for `m_SignMask()`


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D149689/new/

https://reviews.llvm.org/D149689

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/atomic-bit-test.ll
  llvm/test/CodeGen/X86/atomic-xor.ll

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