[all-commits] [llvm/llvm-project] 8ac721: [AMDGPU] SelectionDAG divergence tracking should t...

[alex-t via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8ac7210b7f0ad49ae7809bf6a9faf2f7433384b0
      https://github.com/llvm/llvm-project/commit/8ac7210b7f0ad49ae7809bf6a9faf2f7433384b0
  Author: alex-t <alex-t at users.noreply.github.com>
  Date:   2025-07-03 (Thu, 03 Jul 2025)

  Changed paths:
    M llvm/include/llvm/CodeGen/SelectionDAG.h
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
    M llvm/test/CodeGen/AMDGPU/load-constant-always-uniform.ll
    A llvm/test/CodeGen/AMDGPU/test_isel_single_lane.ll
    M llvm/unittests/CodeGen/SelectionDAGAddressAnalysisTest.cpp
    M llvm/unittests/CodeGen/SelectionDAGPatternMatchTest.cpp

  Log Message:
  -----------
  [AMDGPU] SelectionDAG divergence tracking should take into account Target divergency. (#144947)

If a kernel is known to be executing only a single lane, IR
UniformityAnalysis will take note of that (via
GCNTTIImpl::hasBranchDivergence) and report that all values are uniform.
SelectionDAG's built-in divergence tracking should do the same.



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