[PATCH] D124908: Optimize new cases for lowerConvertToSVBool

[Alban Bridonneau via Phabricator via llvm-commits]

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Converts to SVBool are already considered as a nop, if they
are converting an operand from a ptrue or a cmp, because
they zero the extra predicate lanes by construction.

This patch adds 2 similar cases:

- The wide cmp, which were not directly recognized by the test

for other forms of cmp

- Splats of 1, which will be generated as ptrue, and as such

will also zero the extra predicate lines.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D124908

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/sve-intrinsics-reinterpret-no-streaming.ll
  llvm/test/CodeGen/AArch64/sve-ptest-removal-cmpeq.ll
  llvm/test/CodeGen/AArch64/sve-ptest-removal-cmpge.ll
  llvm/test/CodeGen/AArch64/sve-ptest-removal-cmpgt.ll
  llvm/test/CodeGen/AArch64/sve-ptest-removal-cmphi.ll
  llvm/test/CodeGen/AArch64/sve-ptest-removal-cmphs.ll
  llvm/test/CodeGen/AArch64/sve-ptest-removal-cmple.ll
  llvm/test/CodeGen/AArch64/sve-ptest-removal-cmplo.ll
  llvm/test/CodeGen/AArch64/sve-ptest-removal-cmpls.ll
  llvm/test/CodeGen/AArch64/sve-ptest-removal-cmplt.ll
  llvm/test/CodeGen/AArch64/sve-ptest-removal-cmpne.ll
  llvm/test/CodeGen/AArch64/sve-vector-splat.ll

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