[PATCH] D72257: [ARM] Use reduction intrinsics for larger than legal reductions

[Dave Green via Phabricator via llvm-commits]

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

The codegen for splitting a llvm.vector.reduction intrinsic into parts will be better than the codegen for the generic reductions. This will only directly effect when vectorization factors are specified by the user.

Also added tests to make sure the codegen for larger reductions is OK.


https://reviews.llvm.org/D72257

Files:
  llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
  llvm/test/CodeGen/Thumb2/mve-vaddv.ll
  llvm/test/Transforms/LoopVectorize/ARM/mve-reduce.ll

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