[all-commits] [llvm/llvm-project] 5d3a69: [AMDGPU] New llvm.amdgcn.ballot intrinsic

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  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 5d3a69feca127618d99c262d3805bd5a9a6ca09b
      https://github.com/llvm/llvm-project/commit/5d3a69feca127618d99c262d3805bd5a9a6ca09b
  Author: Sebastian Neubauer <sebastian.neubauer at amd.com>
  Date:   2020-03-31 (Tue, 31 Mar 2020)

  Changed paths:
    M llvm/include/llvm/IR/IntrinsicsAMDGPU.td
    M llvm/lib/Target/AMDGPU/AMDGPUAtomicOptimizer.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
    M llvm/lib/Target/AMDGPU/SIISelLowering.cpp
    M llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
    M llvm/test/Analysis/DivergenceAnalysis/AMDGPU/always_uniform.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_pixelshader.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_raw_buffer.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_struct_buffer.ll
    A llvm/test/CodeGen/AMDGPU/llvm.amdgcn.ballot.i32.ll
    A llvm/test/CodeGen/AMDGPU/llvm.amdgcn.ballot.i64.ll
    M llvm/test/Transforms/InstCombine/AMDGPU/amdgcn-intrinsics.ll

  Log Message:
  -----------
  [AMDGPU] New llvm.amdgcn.ballot intrinsic

Add a new llvm.amdgcn.ballot intrinsic modeled on the ballot function
in GLSL and other shader languages. It returns a bitfield containing the
result of its boolean argument in all active lanes, and zero in all
inactive lanes.

This is intended to replace the existing llvm.amdgcn.icmp and
llvm.amdgcn.fcmp intrinsics after a suitable transition period.

Use the new intrinsic in the atomic optimizer pass.

Differential Revision: https://reviews.llvm.org/D65088