[PATCH] D112920: [ARM] Push gather/scatter shl index updates out of loops

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: samtebbs, anwel.
Herald added subscribers: arphaman, hiraditya, kristof.beyls.
dmgreen requested review of this revision.
Herald added a project: LLVM.

This teaches the MVE gather scatter lowing pass that SHL is essentially the same as Mul, where we are able to optimize the induction of a gather/scatter address to push them out of loops.
https://alive2.llvm.org/ce/z/wG4VyT


https://reviews.llvm.org/D112920

Files:
  llvm/lib/Target/ARM/MVEGatherScatterLowering.cpp
  llvm/test/CodeGen/Thumb2/mve-gather-increment.ll
  llvm/test/CodeGen/Thumb2/mve-scatter-increment.ll

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