[all-commits] [llvm/llvm-project] 76be75: 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: 76be7587e61c913b194cd9fe5f39fd1f4f9fdd9d
      https://github.com/llvm/llvm-project/commit/76be7587e61c913b194cd9fe5f39fd1f4f9fdd9d
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-22 (Tue, 22 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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