[PATCH] D79301: [LSR] Don't require reuse register under postinc

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: samparker, bcahoon, gilr, qcolombet, sgundapa.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

LSR has some logic that tries to aggressively reuse registers in formula. This can lead to sub-optimal decision in complex loops where the backend it trying to use shouldFavorPostInc. This disables the re-use in those situations.


https://reviews.llvm.org/D79301

Files:
  llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
  llvm/test/CodeGen/Thumb2/mve-postinc-lsr.ll

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