[all-commits] [llvm/llvm-project] 8ee5e1: [AMDGPU] Fix @llvm.amdgcn.cs.chain with SGPR args ...

[Jay Foad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8ee5e19c879ee2d467aa0f1eb8f1d8ed34321496
      https://github.com/llvm/llvm-project/commit/8ee5e19c879ee2d467aa0f1eb8f1d8ed34321496
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2024-10-30 (Wed, 30 Oct 2024)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
    M llvm/lib/Target/AMDGPU/SIISelLowering.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/irtranslator-amdgcn-cs-chain.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/irtranslator-call-non-fixed.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/irtranslator-call.ll
    M llvm/test/CodeGen/AMDGPU/amdgpu-cs-chain-cc.ll
    M llvm/test/CodeGen/AMDGPU/isel-amdgcn-cs-chain-intrinsic-w32.ll
    M llvm/test/CodeGen/AMDGPU/isel-amdgcn-cs-chain-intrinsic-w64.ll

  Log Message:
  -----------
  [AMDGPU] Fix @llvm.amdgcn.cs.chain with SGPR args not provably uniform (#114232)

The correct behaviour is to insert a readfirstlane. SelectionDAG was
already doing this in some cases, but not in the general case for chain
calls. GlobalISel was already doing this for return values but not for
arguments.



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