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

Wed Jun 26 21:31:31 PDT 2024

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-mlir-rhel-clang` running on `ppc64le-mlir-rhel-test` while building `llvm` at step 5 "build-check-mlir-build-only".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/129/builds/819

Here is the relevant piece of the build log for the reference:
```
Step 5 (build-check-mlir-build-only) failure: build (failure)
...
14.462 [297/384/3280] Building CXX object tools/mlir/test/lib/Transforms/CMakeFiles/MLIRTestTransforms.dir/TestMakeIsolatedFromAbove.cpp.o
14.504 [297/383/3281] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/RegisterBank.cpp.o
14.517 [297/382/3282] Building CXX object tools/mlir/tools/mlir-lsp-server/CMakeFiles/mlir-lsp-server.dir/mlir-lsp-server.cpp.o
14.518 [297/381/3283] Building CXX object tools/mlir/tools/mlir-opt/CMakeFiles/mlir-opt.dir/mlir-opt.cpp.o
14.529 [297/380/3284] Linking CXX executable tools/mlir/unittests/Transforms/MLIRTransformsTests
15.099 [297/379/3285] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineBranchProbabilityInfo.cpp.o
15.155 [297/378/3286] Building CXX object lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/SelectionDAGPrinter.cpp.o
15.701 [297/377/3287] Building CXX object lib/CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/InstructionSelector.cpp.o
15.969 [297/376/3288] Building CXX object lib/Transforms/Vectorize/CMakeFiles/LLVMVectorize.dir/LoopIdiomVectorize.cpp.o
16.169 [297/375/3289] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachinePostDominators.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachinePostDominators.cpp.o 
ccache /home/buildbots/llvm-external-buildbots/clang.16.0.1/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/buildbots/llvm-external-buildbots/workers/ppc64le-mlir-rhel-test/ppc64le-mlir-rhel-clang-build/build/lib/CodeGen -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-mlir-rhel-test/ppc64le-mlir-rhel-clang-build/llvm-project/llvm/lib/CodeGen -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-mlir-rhel-test/ppc64le-mlir-rhel-clang-build/build/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-mlir-rhel-test/ppc64le-mlir-rhel-clang-build/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 -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachinePostDominators.cpp.o -MF lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachinePostDominators.cpp.o.d -o lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachinePostDominators.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-mlir-rhel-test/ppc64le-mlir-rhel-clang-build/llvm-project/llvm/lib/CodeGen/MachinePostDominators.cpp
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-mlir-rhel-test/ppc64le-mlir-rhel-clang-build/llvm-project/llvm/lib/CodeGen/MachinePostDominators.cpp:14:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-mlir-rhel-test/ppc64le-mlir-rhel-clang-build/llvm-project/llvm/include/llvm/CodeGen/MachinePostDominators.h:53:3: error: constructor cannot be redeclared
  MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
  ^
/home/buildbots/llvm-external-buildbots/workers/ppc64le-mlir-rhel-test/ppc64le-mlir-rhel-clang-build/llvm-project/llvm/include/llvm/CodeGen/MachinePostDominators.h:51:12: note: previous definition is here
  explicit MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
           ^
1 error generated.
16.412 [297/374/3290] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineFunctionPrinterPass.cpp.o
16.517 [297/373/3291] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LoopTraversal.cpp.o
16.556 [297/372/3292] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/TargetOptionsImpl.cpp.o
16.840 [297/371/3293] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRPrintingPass.cpp.o
16.866 [297/370/3294] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/SpillPlacement.cpp.o
17.098 [297/369/3295] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/GISel/PPCLegalizerInfo.cpp.o
17.100 [297/368/3296] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AllocationOrder.cpp.o
17.213 [297/367/3297] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/FuncletLayout.cpp.o
17.293 [297/366/3298] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRYamlMapping.cpp.o
17.497 [297/365/3299] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PHIEliminationUtils.cpp.o
17.621 [297/364/3300] Building CXX object lib/CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/LostDebugLocObserver.cpp.o
17.642 [297/363/3301] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveRegUnits.cpp.o
17.678 [297/362/3302] Building CXX object tools/mlir/lib/ExecutionEngine/CMakeFiles/obj.MLIRExecutionEngineUtils.dir/OptUtils.cpp.o
17.806 [297/361/3303] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/RegisterClassInfo.cpp.o
17.813 [297/360/3304] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/EdgeBundles.cpp.o
17.826 [297/359/3305] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRNamerPass.cpp.o
17.883 [297/358/3306] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LivePhysRegs.cpp.o
18.078 [297/357/3307] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/GISel/PPCRegisterBankInfo.cpp.o
18.378 [297/356/3308] Building CXX object lib/CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/GISelChangeObserver.cpp.o
18.425 [297/355/3309] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LazyMachineBlockFrequencyInfo.cpp.o
18.437 [297/354/3310] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/OptimizePHIs.cpp.o
18.460 [297/353/3311] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/StackMapLivenessAnalysis.cpp.o
18.585 [297/352/3312] Building CXX object lib/CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/GIMatchTableExecutor.cpp.o
18.596 [297/351/3313] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineOptimizationRemarkEmitter.cpp.o
18.637 [297/350/3314] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/GISel/PPCCallLowering.cpp.o
18.775 [297/349/3315] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/InterferenceCache.cpp.o
18.808 [297/348/3316] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/RegUsageInfoCollector.cpp.o
18.838 [297/347/3317] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveDebugValues/LiveDebugValues.cpp.o
18.849 [297/346/3318] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/FaultMaps.cpp.o

```

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