[PATCH] D82456: [ARM] Use BaseT::getMemoryOpCost for getMemoryOpCost

[Dave Green via Phabricator via llvm-commits]

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

This alters getMemoryOpCost to use the Base TargetTransformInfo version that includes some additional checks for whether extending loads are legal. This will generally have the effect of making <2 x ..> and some <4 x ..> loads/stores more expensive, which in turn should help favour larger vector factors.

Notably it alters the cost of a <4 x half>, which with the current codegen will be expensive if it is not extended.


https://reviews.llvm.org/D82456

Files:
  llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/ARM/cast.ll
  llvm/test/Analysis/CostModel/ARM/load_store.ll
  llvm/test/Transforms/LoopVectorize/ARM/prefer-tail-loop-folding.ll

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