[all-commits] [llvm/llvm-project] f142f8: [AMDGPU] Improve uniform argument handling in Inst...

[Jay Foad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f142f8afe21bceb00fb495468aa0b5043e98c419
      https://github.com/llvm/llvm-project/commit/f142f8afe21bceb00fb495468aa0b5043e98c419
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2024-08-23 (Fri, 23 Aug 2024)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp
    M llvm/test/Transforms/InstCombine/AMDGPU/amdgcn-intrinsics.ll

  Log Message:
  -----------
  [AMDGPU] Improve uniform argument handling in InstCombineIntrinsic (#105812)

Common up handling of intrinsics that are a no-op on uniform arguments.
This catches a couple of new cases:

readlane (readlane x, y), z -> readlane x, y
(for any z, does not have to equal y).

permlane64 (readfirstlane x) -> readfirstlane x
(and likewise for any other uniform argument to permlane64).



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