[PATCH] D107351: [RDA] Attempt to make RDA subreg aware

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: samparker, foad, SjoerdMeijer, samtebbs, MatzeB, efriedma, arsenm.
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dmgreen requested review of this revision.
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This attempts to make more of RDA aware of potentially overlapping subregisters. Some of this was already in place, with it iterating through MCRegUnitIterators. This also replaces calls to LiveRegs.contains(..) with !LiveRegs.available(..), and updates the isValidRegUseOf and isValidRegDefOf to search subregs.


https://reviews.llvm.org/D107351

Files:
  llvm/lib/CodeGen/ReachingDefAnalysis.cpp
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/subreg-liveness.mir

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