[all-commits] [llvm/llvm-project] 32cb3c: [NFC][LLVM][CodeGen] Move LiveDebugVariables.h int...

[Piyou Chen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 32cb3c55080eec70abf282fbe75e6a58cf76f92a
      https://github.com/llvm/llvm-project/commit/32cb3c55080eec70abf282fbe75e6a58cf76f92a
  Author: Piyou Chen <piyou.chen at sifive.com>
  Date:   2024-04-15 (Mon, 15 Apr 2024)

  Changed paths:
    A llvm/include/llvm/CodeGen/LiveDebugVariables.h
    M llvm/lib/CodeGen/LiveDebugVariables.cpp
    R llvm/lib/CodeGen/LiveDebugVariables.h
    M llvm/lib/CodeGen/RegAllocBasic.cpp
    M llvm/lib/CodeGen/RegAllocGreedy.cpp
    M llvm/lib/CodeGen/VirtRegMap.cpp

  Log Message:
  -----------
  [NFC][LLVM][CodeGen] Move LiveDebugVariables.h into llvm/include/llvm/CodeGen (#88374)

This patch make `LiveDebugVariables` can be used by passes outside of
`lib/CodeGen`.

If we run a pass that occurs between the split register allocation pass
without preserving this pass, it will be freed and recomputed until it
encounters the next pass that needs LiveDebugVariables.

However, `LiveDebugVariables` will raise an assertion due to the pass
being freed without emitting a debug value.

This is reason we need `LiveDebugVariables` to be available for passes
outside of lib/Codegen.



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