[all-commits] [llvm/llvm-project] 1562b7: Reapply "[DomTreeUpdater] Move critical edge split...

[paperchalice via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1562b70eaf6e0b95910fa684dfc53bd5ca6252e7
      https://github.com/llvm/llvm-project/commit/1562b70eaf6e0b95910fa684dfc53bd5ca6252e7
  Author: paperchalice <liujunchang97 at outlook.com>
  Date:   2024-12-13 (Fri, 13 Dec 2024)

  Changed paths:
    M llvm/include/llvm/Analysis/DomTreeUpdater.h
    M llvm/include/llvm/Analysis/GenericDomTreeUpdater.h
    M llvm/include/llvm/Analysis/GenericDomTreeUpdaterImpl.h
    M llvm/include/llvm/CodeGen/MachineBasicBlock.h
    M llvm/include/llvm/CodeGen/MachineDomTreeUpdater.h
    M llvm/include/llvm/CodeGen/MachineDominators.h
    M llvm/include/llvm/CodeGen/MachineSSAContext.h
    M llvm/lib/Analysis/DomTreeUpdater.cpp
    M llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
    M llvm/lib/CodeGen/LazyMachineBlockFrequencyInfo.cpp
    M llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.cpp
    M llvm/lib/CodeGen/LiveDebugValues/LiveDebugValues.cpp
    M llvm/lib/CodeGen/MachineBasicBlock.cpp
    M llvm/lib/CodeGen/MachineDomTreeUpdater.cpp
    M llvm/lib/CodeGen/MachineDominanceFrontier.cpp
    M llvm/lib/CodeGen/MachineDominators.cpp
    M llvm/lib/CodeGen/MachineLICM.cpp
    M llvm/lib/CodeGen/MachineLoopInfo.cpp
    M llvm/lib/CodeGen/MachineSink.cpp
    M llvm/lib/CodeGen/MachineUniformityAnalysis.cpp
    M llvm/lib/CodeGen/PHIElimination.cpp
    M llvm/lib/CodeGen/XRayInstrumentation.cpp
    M llvm/lib/Target/AMDGPU/SILateBranchLowering.cpp
    M llvm/lib/Target/AMDGPU/SILowerI1Copies.cpp
    M llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp
    M llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
    M llvm/lib/Target/X86/X86FlagsCopyLowering.cpp
    M llvm/tools/llvm-reduce/deltas/ReduceInstructionsMIR.cpp
    M llvm/unittests/Analysis/DomTreeUpdaterTest.cpp
    M llvm/unittests/Target/WebAssembly/WebAssemblyExceptionInfoTest.cpp

  Log Message:
  -----------
  Reapply "[DomTreeUpdater] Move critical edge splitting code to updater" (#119547)

This relands commit #115111.
Use traditional way to update post dominator tree, i.e. break critical
edge splitting into insert, insert, delete sequence.
When splitting critical edges, the post dominator tree may change its
root node, and `setNewRoot` only works in normal dominator tree...
See

https://github.com/llvm/llvm-project/blob/6c7e5827eda26990e872eb7c3f0d7866ee3c3171/llvm/include/llvm/Support/GenericDomTree.h#L684-L687



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