[PATCH] D138294: [X86] Use lock or/and/xor for cases that we only care about the EFLAGS

[Phoebe Wang via Phabricator via llvm-commits]

pengfei created this revision.
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This is a follow up of D137711 <https://reviews.llvm.org/D137711> to fix the reset of #58685.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D138294

Files:
  llvm/include/llvm/IR/IntrinsicsX86.td
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/pr58685.ll

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