[PATCH] D158291: [PoC][WIP] Add an AArch64 specific pass for loop idiom recognition

[David Sherwood via Phabricator via llvm-commits]

david-arm updated this revision to Diff 556134.
david-arm marked an inline comment as done.
david-arm added a comment.

- Fixed some bugs found by @craig.topper when recognising the byte mismatch idiom. This also required updating one of the tests in Transforms/LoopIdiom/AArch64/byte-compare-index.ll that was using the wrong index for comparison.
- Reinstated the generic loop idiom recognise pass.
- Add new patterns to ensure we use incp instead of cntp+add.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158291/new/

https://reviews.llvm.org/D158291

Files:
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/include/llvm/IR/Intrinsics.td
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/Passes/PassBuilderPipelines.cpp
  llvm/lib/Target/AArch64/AArch64.h
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h
  llvm/lib/Target/AArch64/AArch64LoopIdiomRecognize.cpp
  llvm/lib/Target/AArch64/AArch64LoopIdiomRecognize.h
  llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
  llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
  llvm/lib/Target/AArch64/AArch64TargetMachine.h
  llvm/lib/Target/AArch64/CMakeLists.txt
  llvm/test/CodeGen/AArch64/intrinsic-cttz-elts.ll
  llvm/test/Other/new-pm-defaults.ll
  llvm/test/Transforms/LoopIdiom/AArch64/byte-compare-index.ll
  llvm/test/Transforms/PhaseOrdering/ARM/arm_mean_q7.ll
  llvm/utils/gn/secondary/llvm/lib/Target/AArch64/BUILD.gn

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