[all-commits] [llvm/llvm-project] 137753: [AMDGPU] si-peephole-sdwa: Fix cndmask vcc use for...

[Frederik Harwath via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1377535d993ca9457978d0065dde59ccf1aca187
      https://github.com/llvm/llvm-project/commit/1377535d993ca9457978d0065dde59ccf1aca187
  Author: Frederik Harwath <frederik.harwath at amd.com>
  Date:   2025-05-14 (Wed, 14 May 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIPeepholeSDWA.cpp
    A llvm/test/CodeGen/AMDGPU/sdwa-peephole-cndmask-fail.ll
    M llvm/test/CodeGen/AMDGPU/sdwa-peephole-cndmask-wave32.mir

  Log Message:
  -----------
  [AMDGPU] si-peephole-sdwa: Fix cndmask vcc use for wave32 (#139541)

Before V_CNDMASK_B32_e64 gets converted to SDWA form, a conversion to
V_CNDMASK_B32_e32 occurs.
The vcc use of this instruction must be fixed into a vcc_lo use for wave32.
This fix only happens after the final conversion to the SDWA form. This led
to a compiler error in situations where the conversion to SDWA aborts.

Make sure that the vcc-fix gets applied even if the SDWA conversion is
not completed.

---------

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



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