[llvm] [VPlan] Remove no-op SCALAR-STEPS after unrolling. (PR #123655)

LLVM Continuous Integration via llvm-commits llvm-commits at lists.llvm.org
Tue Mar 25 06:00:43 PDT 2025 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `cross-project-tests-sie-ubuntu` running on `doug-worker-1a` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/181/builds/16231

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (build-unified-tree) failure: build (failure)
...
30.436 [35/2/103] Linking CXX static library lib/libLLVMVectorize.a
30.577 [28/8/104] Linking CXX executable bin/lli-child-target
31.543 [27/8/105] Linking CXX executable bin/llvm-jitlink
31.604 [26/8/106] Linking CXX executable bin/llvm-extract
32.010 [25/8/107] Linking CXX executable bin/llvm-link
32.111 [24/8/108] Linking CXX executable bin/llvm-exegesis
32.277 [23/8/109] Linking CXX executable bin/llvm-profgen
32.284 [23/7/110] Linking CXX executable bin/bugpoint
32.444 [23/6/111] Linking CXX executable bin/lli
32.820 [23/5/112] Linking CXX executable bin/llvm-opt-fuzzer
FAILED: bin/llvm-opt-fuzzer 
: && /opt/ccache/bin/g++ -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -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-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -fuse-ld=gold    -Wl,--gc-sections tools/llvm-opt-fuzzer/CMakeFiles/llvm-opt-fuzzer.dir/DummyOptFuzzer.cpp.o tools/llvm-opt-fuzzer/CMakeFiles/llvm-opt-fuzzer.dir/llvm-opt-fuzzer.cpp.o -o bin/llvm-opt-fuzzer  -Wl,-rpath,"\$ORIGIN/../lib"  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMX86AsmParser.a  lib/libLLVMX86CodeGen.a  lib/libLLVMX86Desc.a  lib/libLLVMX86Info.a  lib/libLLVMAnalysis.a  lib/libLLVMBitReader.a  lib/libLLVMBitWriter.a  lib/libLLVMCodeGen.a  lib/libLLVMCore.a  lib/libLLVMCoroutines.a  lib/libLLVMFuzzMutate.a  lib/libLLVMFuzzerCLI.a  lib/libLLVMipo.a  lib/libLLVMInstCombine.a  lib/libLLVMInstrumentation.a  lib/libLLVMMC.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMPasses.a  lib/libLLVMScalarOpts.a  lib/libLLVMSupport.a  lib/libLLVMTarget.a  lib/libLLVMTargetParser.a  lib/libLLVMTransformUtils.a  lib/libLLVMVectorize.a  -lpthread  lib/libLLVMMCDisassembler.a  lib/libLLVMAsmPrinter.a  lib/libLLVMGlobalISel.a  lib/libLLVMSelectionDAG.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMCGData.a  lib/libLLVMCoroutines.a  lib/libLLVMipo.a  lib/libLLVMBitWriter.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMObjectYAML.a  lib/libLLVMFrontendAtomic.a  lib/libLLVMLinker.a  lib/libLLVMInstrumentation.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMTarget.a  lib/libLLVMVectorize.a  lib/libLLVMSandboxIR.a  lib/libLLVMCFGuard.a  lib/libLLVMIRPrinter.a  lib/libLLVMHipStdPar.a  lib/libLLVMTransformUtils.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMObject.a  lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMIRReader.a  lib/libLLVMBitReader.a  lib/libLLVMAsmParser.a  lib/libLLVMTextAPI.a  lib/libLLVMCore.a  lib/libLLVMBinaryFormat.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMTargetParser.a  lib/libLLVMSupport.a  lib/libLLVMDemangle.a  -lrt  -ldl  -lpthread  -lm  /usr/lib/x86_64-linux-gnu/libz.so && :
lib/libLLVMVectorize.a(VPlanTransforms.cpp.o):VPlanTransforms.cpp:function llvm::VPlanTransforms::simplifyRecipes(llvm::VPlan&, llvm::Type&) [clone .localalias]: error: undefined reference to 'llvm::VPUnrollPartAccessor<2u>::getUnrollPart(llvm::VPUser&) const'
collect2: error: ld returned 1 exit status
33.072 [23/4/113] Linking CXX executable bin/llc
FAILED: bin/llc 
: && /opt/ccache/bin/g++ -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -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-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -fuse-ld=gold   -Wl,--export-dynamic tools/llc/CMakeFiles/llc.dir/llc.cpp.o tools/llc/CMakeFiles/llc.dir/NewPMDriver.cpp.o -o bin/llc  -Wl,-rpath,"\$ORIGIN/../lib:"  lib/libLLVMX86AsmParser.a  lib/libLLVMX86CodeGen.a  lib/libLLVMX86Desc.a  lib/libLLVMX86Info.a  lib/libLLVMAnalysis.a  lib/libLLVMAsmPrinter.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMCore.a  lib/libLLVMIRPrinter.a  lib/libLLVMIRReader.a  lib/libLLVMMC.a  lib/libLLVMMIRParser.a  lib/libLLVMPasses.a  lib/libLLVMRemarks.a  lib/libLLVMScalarOpts.a  lib/libLLVMSelectionDAG.a  lib/libLLVMSupport.a  lib/libLLVMTarget.a  lib/libLLVMTargetParser.a  lib/libLLVMTransformUtils.a  lib/libLLVMVectorize.a  -lpthread  lib/libLLVMMCDisassembler.a  lib/libLLVMGlobalISel.a  lib/libLLVMSelectionDAG.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMCGData.a  lib/libLLVMIRPrinter.a  lib/libLLVMTarget.a  lib/libLLVMCFGuard.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMCoroutines.a  lib/libLLVMHipStdPar.a  lib/libLLVMipo.a  lib/libLLVMVectorize.a  lib/libLLVMSandboxIR.a  lib/libLLVMInstrumentation.a  lib/libLLVMBitWriter.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMObjectYAML.a  lib/libLLVMFrontendAtomic.a  lib/libLLVMLinker.a  lib/libLLVMInstCombine.a  lib/libLLVMTransformUtils.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMObject.a  lib/libLLVMIRReader.a  lib/libLLVMAsmParser.a  lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMBitReader.a  lib/libLLVMTextAPI.a  lib/libLLVMCore.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMBinaryFormat.a  lib/libLLVMTargetParser.a  lib/libLLVMSupport.a  lib/libLLVMDemangle.a  -lrt  -ldl  -lpthread  -lm  /usr/lib/x86_64-linux-gnu/libz.so && :
lib/libLLVMVectorize.a(VPlanTransforms.cpp.o):VPlanTransforms.cpp:function llvm::VPlanTransforms::simplifyRecipes(llvm::VPlan&, llvm::Type&) [clone .localalias]: error: undefined reference to 'llvm::VPUnrollPartAccessor<2u>::getUnrollPart(llvm::VPUser&) const'
collect2: error: ld returned 1 exit status
33.644 [23/3/114] Building CXX object lib/LTO/CMakeFiles/LLVMLTO.dir/LTO.cpp.o
33.984 [23/2/115] Linking CXX executable bin/llvm-reduce
FAILED: bin/llvm-reduce 
: && /opt/ccache/bin/g++ -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -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-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -fuse-ld=gold    -Wl,--gc-sections tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/DeltaManager.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/ReducerWorkItem.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/TestRunner.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/Delta.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/Utils.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceAliases.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceArguments.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceAttributes.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceBasicBlocks.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceDIMetadata.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceDistinctMetadata.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceDbgRecords.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceFunctionBodies.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceFunctions.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceGlobalObjects.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceGlobalValues.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceGlobalVarInitializers.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceGlobalVars.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceInstructions.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceInstructionFlags.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceInvokes.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceMetadata.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceModuleData.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceMemoryOperations.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceOperandBundles.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceOpcodes.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceSpecialGlobals.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceOperands.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceOperandsSkip.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceOperandsToArgs.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceInstructionsMIR.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceInstructionFlagsMIR.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceIRReferences.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceVirtualRegisters.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceRegisterMasks.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceRegisterDefs.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceRegisterUses.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceUsingSimplifyCFG.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/RunIRPasses.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/SimplifyInstructions.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/StripDebugInfo.cpp.o tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/llvm-reduce.cpp.o -o bin/llvm-reduce  -Wl,-rpath,"\$ORIGIN/../lib:"  lib/libLLVMX86AsmParser.a  lib/libLLVMX86CodeGen.a  lib/libLLVMX86Desc.a  lib/libLLVMX86Info.a  lib/libLLVMAnalysis.a  lib/libLLVMBitReader.a  lib/libLLVMBitWriter.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMCore.a  lib/libLLVMipo.a  lib/libLLVMIRReader.a  lib/libLLVMMC.a  lib/libLLVMMIRParser.a  lib/libLLVMPasses.a  lib/libLLVMSupport.a  lib/libLLVMTarget.a  lib/libLLVMTargetParser.a  lib/libLLVMTransformUtils.a  -lpthread  lib/libLLVMMCDisassembler.a  lib/libLLVMAsmPrinter.a  lib/libLLVMGlobalISel.a  lib/libLLVMSelectionDAG.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMCGData.a  lib/libLLVMTarget.a  lib/libLLVMCFGuard.a  lib/libLLVMIRPrinter.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMCoroutines.a  lib/libLLVMipo.a  lib/libLLVMBitWriter.a  lib/libLLVMInstrumentation.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMObjectYAML.a  lib/libLLVMFrontendAtomic.a  lib/libLLVMLinker.a  lib/libLLVMVectorize.a  lib/libLLVMSandboxIR.a  lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMHipStdPar.a  lib/libLLVMTransformUtils.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMObject.a  lib/libLLVMIRReader.a  lib/libLLVMBitReader.a  lib/libLLVMAsmParser.a  lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMTextAPI.a  lib/libLLVMCore.a  lib/libLLVMBinaryFormat.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMTargetParser.a  lib/libLLVMSupport.a  lib/libLLVMDemangle.a  -lrt  -ldl  -lpthread  -lm  /usr/lib/x86_64-linux-gnu/libz.so && :
lib/libLLVMVectorize.a(VPlanTransforms.cpp.o):VPlanTransforms.cpp:function llvm::VPlanTransforms::simplifyRecipes(llvm::VPlan&, llvm::Type&) [clone .localalias]: error: undefined reference to 'llvm::VPUnrollPartAccessor<2u>::getUnrollPart(llvm::VPUser&) const'
collect2: error: ld returned 1 exit status
33.984 [23/1/116] Linking CXX executable bin/opt
FAILED: bin/opt 
: && /opt/ccache/bin/g++ -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -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-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -fuse-ld=gold   -Wl,--export-dynamic tools/opt/CMakeFiles/opt.dir/opt.cpp.o -o bin/opt  -Wl,-rpath,"\$ORIGIN/../lib:"  lib/libLLVMX86AsmParser.a  lib/libLLVMX86CodeGen.a  lib/libLLVMX86Desc.a  lib/libLLVMX86Info.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMAnalysis.a  lib/libLLVMAsmParser.a  lib/libLLVMBitWriter.a  lib/libLLVMCFGuard.a  lib/libLLVMCodeGen.a  lib/libLLVMCore.a  lib/libLLVMCoroutines.a  lib/libLLVMExtensions.a  lib/libLLVMipo.a  lib/libLLVMIRReader.a  lib/libLLVMIRPrinter.a  lib/libLLVMInstCombine.a  lib/libLLVMInstrumentation.a  lib/libLLVMMC.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMRemarks.a  lib/libLLVMScalarOpts.a  lib/libLLVMSupport.a  lib/libLLVMTarget.a  lib/libLLVMTargetParser.a  lib/libLLVMTransformUtils.a  lib/libLLVMVectorize.a  lib/libLLVMPasses.a  -lpthread  lib/libLLVMOptDriver.a  lib/libLLVMX86AsmParser.a  lib/libLLVMX86CodeGen.a  lib/libLLVMAsmPrinter.a  lib/libLLVMGlobalISel.a  lib/libLLVMSelectionDAG.a  lib/libLLVMX86Desc.a  lib/libLLVMMCDisassembler.a  lib/libLLVMX86Info.a  lib/libLLVMExtensions.a  lib/libLLVMPasses.a  lib/libLLVMCFGuard.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMCGData.a  lib/libLLVMCoroutines.a  lib/libLLVMipo.a  lib/libLLVMBitWriter.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMObjectYAML.a  lib/libLLVMFrontendAtomic.a  lib/libLLVMLinker.a  lib/libLLVMIRPrinter.a  lib/libLLVMInstrumentation.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMTarget.a  lib/libLLVMVectorize.a  lib/libLLVMSandboxIR.a  lib/libLLVMHipStdPar.a  lib/libLLVMTransformUtils.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMObject.a  lib/libLLVMIRReader.a  lib/libLLVMAsmParser.a  lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMBitReader.a  lib/libLLVMTextAPI.a  lib/libLLVMCore.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMBinaryFormat.a  lib/libLLVMTargetParser.a  lib/libLLVMSupport.a  lib/libLLVMDemangle.a  -lrt  -ldl  -lpthread  -lm  /usr/lib/x86_64-linux-gnu/libz.so && :
lib/libLLVMVectorize.a(VPlanTransforms.cpp.o):VPlanTransforms.cpp:function llvm::VPlanTransforms::simplifyRecipes(llvm::VPlan&, llvm::Type&) [clone .localalias]: error: undefined reference to 'llvm::VPUnrollPartAccessor<2u>::getUnrollPart(llvm::VPUser&) const'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/123655

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