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

Wed Jun 26 21:30:58 PDT 2024

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-ppc64le-linux-multistage` running on `ppc64le-clang-multistage-test` while building `llvm` at step 4 "build stage 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/76/builds/414

Here is the relevant piece of the build log for the reference:
```
Step 4 (build stage 1) failure: 'ninja' (failure)
...
[2760/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveRangeCalc.cpp.o
[2761/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LiveRangeShrink.cpp.o
[2762/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/LocalStackSlotAllocation.cpp.o
[2763/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineCFGPrinter.cpp.o
[2764/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineInstrBundle.cpp.o
[2765/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineLateInstrsCleanup.cpp.o
[2766/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineLoopUtils.cpp.o
[2767/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineModuleInfo.cpp.o
[2768/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineModuleSlotTracker.cpp.o
[2769/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachinePostDominators.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachinePostDominators.cpp.o 
ccache /usr/lib64/ccache/c++ -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-clang-multistage-test/clang-ppc64le-multistage/stage1/lib/CodeGen -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/CodeGen -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/stage1/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17 -fPIC  -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-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/CodeGen/MachinePostDominators.cpp
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/lib/CodeGen/MachinePostDominators.cpp:14:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/CodeGen/MachinePostDominators.h:53:3: error: ‘llvm::MachinePostDominatorTree::MachinePostDominatorTree(llvm::MachineFunction&)’ cannot be overloaded with ‘llvm::MachinePostDominatorTree::MachinePostDominatorTree(llvm::MachineFunction&)’
   MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
   ^~~~~~~~~~~~~~~~~~~~~~~~
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-multistage-test/clang-ppc64le-multistage/llvm/llvm/include/llvm/CodeGen/MachinePostDominators.h:51:12: note: previous declaration ‘llvm::MachinePostDominatorTree::MachinePostDominatorTree(llvm::MachineFunction&)’
   explicit MachinePostDominatorTree(MachineFunction &MF) { recalculate(MF); }
            ^~~~~~~~~~~~~~~~~~~~~~~~
[2770/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineRegisterInfo.cpp.o
[2771/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineStripDebug.cpp.o
[2772/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MLRegAllocPriorityAdvisor.cpp.o
[2773/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MacroFusion.cpp.o
[2774/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PostRAHazardRecognizer.cpp.o
[2775/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/ProcessImplicitDefs.cpp.o
[2776/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PseudoProbeInserter.cpp.o
[2777/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/PseudoSourceValue.cpp.o
[2778/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/RegAllocEvictionAdvisor.cpp.o
[2779/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/RegAllocPriorityAdvisor.cpp.o
[2780/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/GCEmptyBasicBlocks.cpp.o
[2781/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/RemoveRedundantDebugValues.cpp.o
[2782/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MachineStableHash.cpp.o
[2783/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRVRegNamerUtils.cpp.o
[2784/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/MIRCanonicalizerPass.cpp.o
[2785/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/RegisterUsageInfo.cpp.o
[2786/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/RegUsageInfoCollector.cpp.o
[2787/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/RegUsageInfoPropagate.cpp.o
[2788/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/SanitizerBinaryMetadata.cpp.o
[2789/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/TailDuplication.cpp.o
[2790/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/TargetFrameLoweringImpl.cpp.o
[2791/6048] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/TargetSchedule.cpp.o
[2792/6048] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/ARMException.cpp.o
[2793/6048] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/AsmPrinterDwarf.cpp.o
[2794/6048] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/DwarfStringPool.cpp.o
[2795/6048] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/ErlangGCPrinter.cpp.o
[2796/6048] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/WinCFGuard.cpp.o
[2797/6048] Building CXX object lib/CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/GIMatchTableExecutor.cpp.o
[2798/6048] Building CXX object lib/CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/LegalizerInfo.cpp.o
[2799/6048] Building CXX object lib/CodeGen/GlobalISel/CMakeFiles/LLVMGlobalISel.dir/LostDebugLocObserver.cpp.o

```

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