[PATCH] D132255: [TwoAddressInstruction] Handle pointer compare sunk past statepoint.

[Denis Antrushin via Phabricator via llvm-commits]

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  CodeGenPrepare pass can sink pointer comparison across statepoint
  to the point of use (see comment in IR/SafepointIRVerifier.cpp)
  Due to specifics of statepoints, it is still legal to have tied
  def and use rewritten to the same register in TwoAddress pass.
  However, properly updating LiveIntervals and LiveVariables becomes
  complicated. For simplicity, let's fall back to generic handling of
  tied registers when we detect such case.
  



Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D132255

Files:
  llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
  llvm/test/CodeGen/X86/statepoint-cmp-sunk-past-statepoint.ll

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