[PATCH] D138428: [X86] Use lock add/sub/or/and/xor for cases that we only care about the EFLAGS (negated cases)

[Phoebe Wang via Phabricator via llvm-commits]

pengfei created this revision.
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This fixes #58685


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D138428

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/pr58685.ll

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