[all-commits] [llvm/llvm-project] 721cba: [AMDGPU] SIPeepholeSDWA: Handle V_CNDMASK_B32_e64 ...

[Frederik Harwath via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 721cba476d68bae13e9c0a0060fd37c386050e74
      https://github.com/llvm/llvm-project/commit/721cba476d68bae13e9c0a0060fd37c386050e74
  Author: Frederik Harwath <frederik.harwath at amd.com>
  Date:   2025-05-05 (Mon, 05 May 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIPeepholeSDWA.cpp
    M llvm/test/CodeGen/AMDGPU/bf16.ll
    M llvm/test/CodeGen/AMDGPU/ctlz_zero_undef.ll
    M llvm/test/CodeGen/AMDGPU/cttz_zero_undef.ll
    M llvm/test/CodeGen/AMDGPU/dagcombine-fmul-sel.ll
    M llvm/test/CodeGen/AMDGPU/extract_vector_elt-f16.ll
    M llvm/test/CodeGen/AMDGPU/extract_vector_elt-i16.ll
    M llvm/test/CodeGen/AMDGPU/fmax_legacy.f16.ll
    M llvm/test/CodeGen/AMDGPU/fmaximum3.ll
    M llvm/test/CodeGen/AMDGPU/fmin_legacy.f16.ll
    M llvm/test/CodeGen/AMDGPU/fminimum3.ll
    M llvm/test/CodeGen/AMDGPU/fneg-modifier-casting.ll
    M llvm/test/CodeGen/AMDGPU/insert_vector_dynelt.ll
    M llvm/test/CodeGen/AMDGPU/insert_vector_elt.v2bf16.ll
    M llvm/test/CodeGen/AMDGPU/insert_vector_elt.v2i16.ll
    M llvm/test/CodeGen/AMDGPU/llvm.maximum.f16.ll
    M llvm/test/CodeGen/AMDGPU/llvm.minimum.f16.ll
    A llvm/test/CodeGen/AMDGPU/sdwa-peephole-cndmask-wave32.mir
    A llvm/test/CodeGen/AMDGPU/sdwa-peephole-cndmask-wave64.mir
    M llvm/test/CodeGen/AMDGPU/select-fabs-fneg-extract.v2f16.ll
    M llvm/test/CodeGen/AMDGPU/select.f16.ll

  Log Message:
  -----------
  [AMDGPU] SIPeepholeSDWA: Handle V_CNDMASK_B32_e64 (#137930)

The VOP3 form of the V_CNDMASK_B32 instruction takes a carry-in
operand. The conversion to SDWA implies a conversion to VOP2 form
which reads from VCC instead.

Convert V_CNDMASK_B32_e64 instructions that might be converted to SDWA
to V_CNDMASK_B32_e32 first and introduce a copy of the carry-in operand
to VCC.

Closes #133431.

---------

Co-authored-by: Matt Arsenault <arsenm2 at gmail.com>



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