[all-commits] [llvm/llvm-project] c5ac63: ThinLTO: Add flag to print uselistorder in bitcode...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c5ac63e4fcd58c951f10c3902d8a6692e0a43c55
      https://github.com/llvm/llvm-project/commit/c5ac63e4fcd58c951f10c3902d8a6692e0a43c55
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-04-14 (Mon, 14 Apr 2025)

  Changed paths:
    M llvm/include/llvm/Transforms/IPO/ThinLTOBitcodeWriter.h
    M llvm/lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp
    A llvm/test/Bitcode/thinlto-preserve-uselistorder.ll
    M llvm/test/Transforms/ThinLTOBitcodeWriter/split.ll
    M llvm/test/Transforms/ThinLTOBitcodeWriter/unsplittable.ll
    M llvm/tools/opt/NewPMDriver.cpp

  Log Message:
  -----------
  ThinLTO: Add flag to print uselistorder in bitcode writer pass (#133230)

This is needed in llvm-reduce to avoid perturbing the uselistorder in
intermediate steps. Really llvm-reduce wants pure serialization with
no dependency on the pass manager. There are other optimizations mixed
in to the serialization here depending on metadata in the module, which
is also bad.
    
Part of #63621



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