[PATCH] D62907: [WIP][ARM] Implement TTI::isHardwareLoopProfitable

[Sam Parker via Phabricator via llvm-commits]

samparker created this revision.
Herald added subscribers: kristof.beyls, javed.absar.

Implement the target hook to drive the HardwareLoop pass. It's relatively basic as it doesn't have to ensure that a low-overhead loop is possible as we'll be able to fix it up later. It's also too pessimistic currently, deciding that any call would reset the loop counting status register.


https://reviews.llvm.org/D62907

Files:
  lib/Target/ARM/ARMTargetTransformInfo.cpp
  lib/Target/ARM/ARMTargetTransformInfo.h
  test/Transforms/HardwareLoops/ARM/calls.ll
  test/Transforms/HardwareLoops/ARM/counter.ll
  test/Transforms/HardwareLoops/ARM/do-rem.ll
  test/Transforms/HardwareLoops/ARM/fp-emulation.ll
  test/Transforms/HardwareLoops/ARM/simple-do.ll
  test/Transforms/HardwareLoops/ARM/structure.ll

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