[all-commits] [llvm/llvm-project] 5fb2ee: NVPTX: Drop LiveVariables from the register alloca...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/nvptx/drop-livevariables
  Home:   https://github.com/llvm/llvm-project
  Commit: 5fb2ee7f3053e30aad9d79817c3f8e0bc47630d8
      https://github.com/llvm/llvm-project/commit/5fb2ee7f3053e30aad9d79817c3f8e0bc47630d8
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-30 (Wed, 30 Sep 2026)

  Changed paths:
    M llvm/lib/Target/NVPTX/NVPTXCodeGenPassBuilder.cpp
    M llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
    M llvm/test/CodeGen/NVPTX/llc-pipeline-npm.ll

  Log Message:
  -----------
  NVPTX: Drop LiveVariables from the register allocation pipeline

The optimized RegAlloc pipeline ran LiveVariables only to satisfy PHIElimination
and TwoAddressInstruction, both of which no longer need it. Remove the
LiveVariables run (and, in the new pass manager, the UnreachableMachineBlockElim
that was there only as a LiveVariables prerequisite).

Co-authored-by: Claude (Claude-Opus-4.8)



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