[all-commits] [llvm/llvm-project] 14727c: [AMDGPU] Disable VALU sinking and hoisting with WWM

[Stanislav Mekhanoshin via All-commits]

  Branch: refs/heads/users/rampitec/01-15-_amdgpu_disable_valu_sinking_and_hoisting_with_wwm
  Home:   https://github.com/llvm/llvm-project
  Commit: 14727cfee643af1268dc87322009a457a10507a8
      https://github.com/llvm/llvm-project/commit/14727cfee643af1268dc87322009a457a10507a8
  Author: Stanislav Mekhanoshin <Stanislav.Mekhanoshin at amd.com>
  Date:   2025-01-17 (Fri, 17 Jan 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
    M llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_global_pointer.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_local_pointer.ll
    M llvm/test/CodeGen/AMDGPU/cse-convergent.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_scan_fadd.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_scan_fmax.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_scan_fmin.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_scan_fsub.ll
    M llvm/test/CodeGen/AMDGPU/licm-wwm.mir
    M llvm/test/CodeGen/AMDGPU/set-inactive-wwm-overwrite.ll
    M llvm/test/CodeGen/AMDGPU/should-not-hoist-set-inactive.ll
    M llvm/test/CodeGen/AMDGPU/wwm-reserved-spill.ll
    M llvm/test/CodeGen/AMDGPU/wwm-reserved.ll
    M llvm/test/CodeGen/MIR/AMDGPU/init-whole.wave.ll

  Log Message:
  -----------
  [AMDGPU] Disable VALU sinking and hoisting with WWM

Machine LICM can hoist a VALU instruction from a WWM region.
In this case WQM pass will have to create yet another WWM region
around the hoisted instruction, which is not desired.

Unfortunatelly we cannot tell if an instruction is in the WWM
region, so this patch disables hoisting if WWM is used in the
function.

This works around the bug SWDEV-502411.



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