[all-commits] [llvm/llvm-project] fef811: [SVE] Optimize new cases for lowerConvertToSVBool

[alban-bridonneau-arm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fef81131d92ef71f43640667b6fc88b241aebe50
      https://github.com/llvm/llvm-project/commit/fef81131d92ef71f43640667b6fc88b241aebe50
  Author: Alban Bridonneau <alban.bridonneau at arm.com>
  Date:   2022-05-09 (Mon, 09 May 2022)

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

  Log Message:
  -----------
  [SVE] Optimize new cases for lowerConvertToSVBool

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.

Reviewed By: paulwalker-arm, peterwaller-arm

Differential Revision: https://reviews.llvm.org/D124908