[PATCH] D78502: [ARM][HWLoops] Create hardware loops for sibling loops

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: samparker, shchenz, SjoerdMeijer, PowerPC.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.

Given a loop with two subloops, it should be possible for both to be converted to hardware loops. That's what this patch does, simply enough. It slightly alters the loop iterating order to try and convert all subloops. If one (or more) succeeds, it stops as before.


https://reviews.llvm.org/D78502

Files:
  llvm/lib/CodeGen/HardwareLoops.cpp
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/sibling-loops.ll
  llvm/test/CodeGen/Thumb2/mve-float16regloops.ll
  llvm/test/CodeGen/Thumb2/mve-float32regloops.ll
  llvm/test/CodeGen/Thumb2/mve-gather-scatter-optimisation.ll

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