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

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `openmp-gcc-x86_64-linux-debian` running on `gribozavr4` while building `llvm` at step 5 "compile-openmp".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/70/builds/507

Here is the relevant piece of the build log for the reference:
```
Step 5 (compile-openmp) failure: build (failure)
...
30.129 [3931/96/1188] Building X86GenInstrInfo.inc...
30.244 [3930/96/1189] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveRangeEdit.cpp.o
30.548 [3929/96/1190] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineFunctionPrinterPass.cpp.o
30.646 [3928/96/1191] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/Analysis.cpp.o
31.038 [3927/96/1192] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/DwarfEHPrepare.cpp.o
31.131 [3926/96/1193] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o
31.395 [3925/96/1194] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AggressiveAntiDepBreaker.cpp.o
31.610 [3924/96/1195] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LocalStackSlotAllocation.cpp.o
31.623 [3923/96/1196] Building RISCVGenGlobalISel.inc...
31.743 [3922/96/1197] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineDomTreeUpdater.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineDomTreeUpdater.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /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/b/1/openmp-gcc-x86_64-linux-debian/llvm.build/lib/CodeGen -I/b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/lib/CodeGen -I/b/1/openmp-gcc-x86_64-linux-debian/llvm.build/include -I/b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/include -fPIC -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 /b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/lib/CodeGen/MachineDomTreeUpdater.cpp
In file included from /b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/lib/CodeGen/MachineDomTreeUpdater.cpp:14:
In file included from /b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/include/llvm/CodeGen/MachineDomTreeUpdater.h:21:
/b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/include/llvm/CodeGen/MachinePostDominators.h:53:3: error: constructor cannot be redeclared
  MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
  ^
/b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/include/llvm/CodeGen/MachinePostDominators.h:51:12: note: previous definition is here
  explicit MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
           ^
1 error generated.
31.845 [3922/95/1198] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/InterleavedLoadCombinePass.cpp.o
31.848 [3922/94/1199] Building RISCVGenInstrInfo.inc...
32.055 [3922/93/1200] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineCFGPrinter.cpp.o
32.256 [3922/92/1201] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineFrameInfo.cpp.o
32.299 [3922/91/1202] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveVariables.cpp.o
32.594 [3922/90/1203] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/IfConversion.cpp.o
32.679 [3922/89/1204] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineInstrBundle.cpp.o
32.718 [3922/88/1205] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineLoopUtils.cpp.o
32.767 [3922/87/1206] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/FixupStatepointCallerSaved.cpp.o
32.925 [3922/86/1207] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineLateInstrsCleanup.cpp.o
32.982 [3922/85/1208] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineDominanceFrontier.cpp.o
33.004 [3922/84/1209] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/BranchFolding.cpp.o
33.105 [3922/83/1210] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineSizeOpts.cpp.o
33.225 [3922/82/1211] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineModuleSlotTracker.cpp.o
33.405 [3922/81/1212] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MBFIWrapper.cpp.o
33.508 [3922/80/1213] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRYamlMapping.cpp.o
33.560 [3922/79/1214] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineCheckDebugify.cpp.o
33.773 [3922/78/1215] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineOptimizationRemarkEmitter.cpp.o
33.840 [3922/77/1216] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineRegionInfo.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineRegionInfo.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /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/b/1/openmp-gcc-x86_64-linux-debian/llvm.build/lib/CodeGen -I/b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/lib/CodeGen -I/b/1/openmp-gcc-x86_64-linux-debian/llvm.build/include -I/b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/include -fPIC -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/MachineRegionInfo.cpp.o -MF lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineRegionInfo.cpp.o.d -o lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineRegionInfo.cpp.o -c /b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/lib/CodeGen/MachineRegionInfo.cpp
In file included from /b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/lib/CodeGen/MachineRegionInfo.cpp:12:
/b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/include/llvm/CodeGen/MachinePostDominators.h:53:3: error: constructor cannot be redeclared
  MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
  ^
/b/1/openmp-gcc-x86_64-linux-debian/llvm.src/llvm/include/llvm/CodeGen/MachinePostDominators.h:51:12: note: previous definition is here
  explicit MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
           ^

```

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