[all-commits] [llvm/llvm-project] 8a6651: [AMDGPU] Don't create mulhi_24 in CGP (#72983)

[Pierre van Houtryve via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8a66510fa73c1507c2a58338e180ddb075993a5a
      https://github.com/llvm/llvm-project/commit/8a66510fa73c1507c2a58338e180ddb075993a5a
  Author: Pierre van Houtryve <pierre.vanhoutryve at amd.com>
  Date:   2023-11-30 (Thu, 30 Nov 2023)

  Changed paths:
    M llvm/include/llvm/IR/IntrinsicsAMDGPU.td
    M llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.td
    M llvm/lib/Target/AMDGPU/VOP2Instructions.td
    M llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-mul24.ll
    M llvm/test/CodeGen/AMDGPU/machine-sink-temporal-divergence-swdev407790.ll
    M llvm/test/CodeGen/AMDGPU/mul_int24.ll
    M llvm/test/CodeGen/AMDGPU/mul_uint24-amdgcn.ll

  Log Message:
  -----------
  [AMDGPU] Don't create mulhi_24 in CGP (#72983)

Instead, create a mul24 with a 64 bit result and let ISel take care of
it.

This allows patterns to simply match mul24 even for 64-bit muls instead of having to match both mul/mulhi and a buildvector/bitconvert/etc.