[PATCH] D73460: [RDA][ARM] Move functionality into RDA

[Sam Parker via Phabricator via llvm-commits]

samparker created this revision.
samparker added reviewers: dmgreen, SjoerdMeijer.
Herald added subscribers: hiraditya, kristof.beyls.
Herald added a project: LLVM.

Add several helpers to RDA:

- hasLocalDefBefore
- isRegDefinedAfter
- isSafeToDefRegAt

And move two bits of logic from ARMLowOverheadLoops into RDA:

- isSafeToMove
- isSafeToRemove

Both of these have some wrappers too to make them more convenient to use. This is an NFC for LowOverheadLoops.


https://reviews.llvm.org/D73460

Files:
  llvm/include/llvm/CodeGen/ReachingDefAnalysis.h
  llvm/lib/CodeGen/ReachingDefAnalysis.cpp
  llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp

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