[all-commits] [llvm/llvm-project] ec941a: [NVPTX] Legalize ctpop and ctlz in operation legal...

[Alex MacLean via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ec941a4a045106430bc643ea094f33eb03603090
      https://github.com/llvm/llvm-project/commit/ec941a4a045106430bc643ea094f33eb03603090
  Author: Alex MacLean <amaclean at nvidia.com>
  Date:   2025-03-12 (Wed, 12 Mar 2025)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
    M llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp
    M llvm/lib/Target/NVPTX/NVPTXInstrInfo.td
    M llvm/test/CodeGen/NVPTX/ctlz.ll
    M llvm/test/CodeGen/NVPTX/intrinsics.ll
    M llvm/test/CodeGen/VE/Scalar/ctlz.ll

  Log Message:
  -----------
  [NVPTX] Legalize ctpop and ctlz in operation legalization (#130668)

By pulling the truncates and extensions out of operations during
operation legalization we enable more optimization via DAGCombiner.
While the test cases show only cosmetic improvements (unlikely to impact
the final SASS) in real programs the exposure of these truncates can
allow for more optimization.



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