[all-commits] [llvm/llvm-project] a04714: [AMDGPU] Add a trap lowering workaround for gfx11 ...

[Emma Pilkington via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a04714701f17663e3e9879a50ed07bbb421ca209
      https://github.com/llvm/llvm-project/commit/a04714701f17663e3e9879a50ed07bbb421ca209
  Author: Emma Pilkington <emma.pilkington95 at gmail.com>
  Date:   2024-04-24 (Wed, 24 Apr 2024)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPU.td
    M llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUISelLowering.h
    M llvm/lib/Target/AMDGPU/AMDGPUInstrInfo.td
    M llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
    M llvm/lib/Target/AMDGPU/GCNSubtarget.h
    M llvm/lib/Target/AMDGPU/SIISelLowering.cpp
    M llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
    M llvm/lib/Target/AMDGPU/SIInstrInfo.h
    M llvm/lib/Target/AMDGPU/SIInstructions.td
    A llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-trap-gfx11.mir
    M llvm/test/CodeGen/AMDGPU/trap-abis.ll

  Log Message:
  -----------
  [AMDGPU] Add a trap lowering workaround for gfx11 (#85854)

On gfx11 shaders run with PRIV=1, which causes `s_trap 2` to be treated
as a nop, which means it isn't a correct lowering for the trap
intrinsic. As a workaround, this commit instead lowers the trap
intrinsic to instructions that simulate the behavior of s_trap 2.

Fixes: SWDEV-438421



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