[PATCH] D87751: [RDA] Fix getUniqueReachingDef for self loops

[Sam Parker via Phabricator via llvm-commits]

samparker created this revision.
samparker added reviewers: samtebbs, nikic, SjoerdMeijer.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.
samparker requested review of this revision.

We've fixed the case where this could return an instruction after the given instruction, but also means that we can falsely return a 'unique' def when they could be one coming from the backedge of loop.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D87751

Files:
  llvm/lib/CodeGen/ReachingDefAnalysis.cpp
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/vctp-add-operand-liveout.mir
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/wlstp.mir
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/wrong-vctp-opcode-liveout.mir
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/wrong-vctp-operand-liveout.mir

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