[all-commits] [llvm/llvm-project] 36faad: [AMDGPU] Port Atomic-Optimizer to use Wave Reducti...

[Aaditya via All-commits]

  Branch: refs/heads/users/easyonaadit/amdgpu/port-atomic-optimizer
  Home:   https://github.com/llvm/llvm-project
  Commit: 36faaddfb9b5b37614df2083b22ec0dfc7aa9f26
      https://github.com/llvm/llvm-project/commit/36faaddfb9b5b37614df2083b22ec0dfc7aa9f26
  Author: Aaditya <Aaditya.AlokDeshpande at amd.com>
  Date:   2026-09-22 (Tue, 22 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUAtomicOptimizer.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/fp64-atomics-gfx90a.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/global-atomic-fadd.f32-no-rtn.ll
    M llvm/test/CodeGen/AMDGPU/atomic-optimizer-promote-i8.ll
    M llvm/test/CodeGen/AMDGPU/atomic-optimizer-volatile.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimization_split_dt_update.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_buffer.ll
    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/atomic_optimizations_mul_one.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_pixelshader.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_raw_buffer.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_struct_buffer.ll
    M llvm/test/CodeGen/AMDGPU/atomics-hw-remarks-gfx90a.ll
    M llvm/test/CodeGen/AMDGPU/global-atomic-fadd.f32-no-rtn.ll
    M llvm/test/CodeGen/AMDGPU/global-atomic-scan.ll
    M llvm/test/CodeGen/AMDGPU/global-atomicrmw-fadd-wrong-subtarget.ll
    M llvm/test/CodeGen/AMDGPU/global-atomics-fp-wrong-subtarget.ll
    M llvm/test/CodeGen/AMDGPU/global_atomic_optimizer_fp_rtn.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_iterative_scan.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_iterative_scan_fp.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_optimizer_fp_no_rtn.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/insert_waitcnt_for_precise_memory.ll
    M llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll

  Log Message:
  -----------
  [AMDGPU] Port Atomic-Optimizer to use Wave Reduction Intrinsics

Currently the atomic optimizer creates reductions via
intrinsics, and introduces new control flows.
Replace this sub-target dependent logic with existing
wave reduction intrinsics, which get lowered in the
backend.
This patch ports the uniform-value and divergent-no-return-value cases.


  Commit: ea2d044572d9cff0adc55fa80b0ee8fd0335cd4f
      https://github.com/llvm/llvm-project/commit/ea2d044572d9cff0adc55fa80b0ee8fd0335cd4f
  Author: Aaditya <Aaditya.AlokDeshpande at amd.com>
  Date:   2026-09-22 (Tue, 22 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUAtomicOptimizer.cpp
    M llvm/test/CodeGen/AMDGPU/global-atomic-scan.ll

  Log Message:
  -----------
  Use unsigned intrinsics + code formatting.


Compare: https://github.com/llvm/llvm-project/compare/da8dad2839b6...ea2d044572d9

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