[llvm] [CodeGen] Introduce `MachineDomTreeUpdater` (PR #95369)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-x86_64-debian` running on `lldb-x86_64-debian` while building `llvm` at step 4 "build".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/162/builds/835

Here is the relevant piece of the build log for the reference:
```
Step 4 (build) failure: build (failure)
...
30.335 [5470/72/677] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LowerEmuTLS.cpp.o
30.373 [5469/72/678] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/BranchFolding.cpp.o
30.404 [5468/72/679] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LocalStackSlotAllocation.cpp.o
30.450 [5467/72/680] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveInterval.cpp.o
30.469 [5466/72/681] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/KCFI.cpp.o
30.540 [5465/72/682] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/HardwareLoops.cpp.o
30.571 [5464/72/683] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineFunctionPrinterPass.cpp.o
30.615 [5463/72/684] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveRangeCalc.cpp.o
31.127 [5462/72/685] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveRangeEdit.cpp.o
31.138 [5461/72/686] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineDomTreeUpdater.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineDomTreeUpdater.cpp.o 
/usr/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/worker/2.0.1/lldb-x86_64-debian/build/lib/CodeGen -I/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/CodeGen -I/home/worker/2.0.1/lldb-x86_64-debian/build/include -I/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineDomTreeUpdater.cpp.o -MF lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineDomTreeUpdater.cpp.o.d -o lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineDomTreeUpdater.cpp.o -c /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/CodeGen/MachineDomTreeUpdater.cpp
In file included from /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/CodeGen/MachineDomTreeUpdater.cpp:14:
In file included from /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/CodeGen/MachineDomTreeUpdater.h:21:
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/CodeGen/MachinePostDominators.h:53:3: error: constructor cannot be redeclared
  MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
  ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/CodeGen/MachinePostDominators.h:51:12: note: previous definition is here
  explicit MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
           ^
1 error generated.
31.253 [5461/71/687] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineCFGPrinter.cpp.o
31.323 [5461/70/688] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MultiHazardRecognizer.cpp.o
31.730 [5461/69/689] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineFrameInfo.cpp.o
31.751 [5461/68/690] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveVariables.cpp.o
31.752 [5461/67/691] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineModuleInfoImpls.cpp.o
31.808 [5461/66/692] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/NonRelocatableStringpool.cpp.o
31.955 [5461/65/693] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/InterleavedAccessPass.cpp.o
32.003 [5461/64/694] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineDominanceFrontier.cpp.o
32.025 [5461/63/695] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/IfConversion.cpp.o
32.267 [5461/62/696] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineBlockPlacement.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineBlockPlacement.cpp.o 
/usr/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/worker/2.0.1/lldb-x86_64-debian/build/lib/CodeGen -I/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/CodeGen -I/home/worker/2.0.1/lldb-x86_64-debian/build/include -I/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineBlockPlacement.cpp.o -MF lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineBlockPlacement.cpp.o.d -o lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineBlockPlacement.cpp.o -c /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/CodeGen/MachineBlockPlacement.cpp
In file included from /home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/CodeGen/MachineBlockPlacement.cpp:44:
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/CodeGen/MachinePostDominators.h:53:3: error: constructor cannot be redeclared
  MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
  ^
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include/llvm/CodeGen/MachinePostDominators.h:51:12: note: previous definition is here
  explicit MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
           ^
1 error generated.
32.289 [5461/61/697] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineLoopUtils.cpp.o
32.387 [5461/60/698] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineOptimizationRemarkEmitter.cpp.o
32.410 [5461/59/699] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/ComplexDeinterleavingPass.cpp.o
32.545 [5461/58/700] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/InterleavedLoadCombinePass.cpp.o
32.564 [5461/57/701] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineInstrBundle.cpp.o
32.566 [5461/56/702] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineCheckDebugify.cpp.o
32.620 [5461/55/703] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineModuleSlotTracker.cpp.o
32.710 [5461/54/704] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachinePostDominators.cpp.o

```

https://github.com/llvm/llvm-project/pull/95369