[18.1.5->18.1.6 regression] clang segfaults when building llvm itself on ppc64/ppc64le on chimera linux (PPCMergeStringPool)

[nekopsykose]

probably caused by #91557

on ppc64le:

FAILED: bin/flang-new 
: && /builddir/llvm-18.1.6/boot-clang++ -ffile-prefix-map=/builddir/llvm-18.1.6=. -Wformat -Werror=format-security -ftrivial-auto-var-init=zero -fstack-clash-protection -fno-omit-frame-pointer -flto=thin -mtune=power9 -O2 -fPIC -g1 -stdlib=libc++ -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 -flto=thin -Wno-deprecated-copy -Wno-string-conversion -Wno-ctad-maybe-unsupported -Wno-unused-command-line-argument -Wstring-conversion           -Wcovered-switch-default -Wno-nested-anon-types -O3 -DNDEBUG -Wl,-z,pack-relative-relocs -fno-omit-frame-pointer -flto=thin -fuse-ld=/usr/lib/llvm-bootstrap/bin/ld.lld -stdlib=libc++ -fuse-ld=lld -Wl,--color-diagnostics -flto=thin -Wl,--thinlto-cache-dir=/builddir/llvm-18.1.6/build/lto.cache   -Wl,--export-dynamic  -Wl,--gc-sections tools/flang/tools/flang-driver/CMakeFiles/flang-new.dir/driver.cpp.o tools/flang/tools/flang-driver/CMakeFiles/flang-new.dir/fc1_main.cpp.o -o bin/flang-new -L/builddir/llvm-18.1.6/build/./lib -Wl,-rpath,"\$ORIGIN/../lib:/builddir/llvm-18.1.6/build/./lib:/builddir/llvm-18.1.6/build/lib:"  lib/libflangFrontend.a  lib/libflangFrontendTool.a  lib/libflangFrontend.a  lib/libFortranLower.a  lib/libFortranSemantics.a  lib/libFortranEvaluate.a  lib/libFortranParser.a  lib/libFortranDecimal.a  lib/libFortranCommon.a  lib/libFIRTransforms.a  lib/libFIRCodeGen.a  lib/libMLIRMathToFuncs.a  lib/libHLFIRTransforms.a  lib/libFIRAnalysis.a  lib/libFIRBuilder.a  lib/libFIRSupport.a  lib/libMLIROpenACCToLLVMIRTranslation.a  lib/libMLIROpenMPToLLVMIRTranslation.a  lib/libHLFIRDialect.a  lib/libFIRDialect.a  lib/libFIRDialectSupport.a  lib/libMLIROpenMPToLLVM.a  lib/libMLIRTargetLLVMIRImport.a  lib/libMLIRAffineTransformOps.a  lib/libMLIRAMDGPUTransforms.a  lib/libMLIRAMDGPUUtils.a  lib/libMLIRAMDGPUDialect.a  lib/libMLIRArithValueBoundsOpInterfaceImpl.a  lib/libMLIRAsyncTransforms.a  lib/libMLIRBufferizationPipelines.a  lib/libMLIRBufferizationTransformOps.a  lib/libMLIRControlFlowTransforms.a  lib/libMLIREmitCTransforms.a  lib/libMLIREmitCDialect.a  lib/libMLIRFuncTransformOps.a  lib/libMLIRGPUTransformOps.a  lib/libMLIRGPUPipelines.a  lib/libMLIRIndexToLLVM.a  lib/libMLIRNVVMToLLVM.a  lib/libMLIRIRDL.a  lib/libMLIRMathTransforms.a  lib/libMLIRMemRefTransformOps.a  lib/libMLIRMeshTransforms.a  lib/libMLIRMLProgramTransforms.a  lib/libMLIRMLProgramDialect.a  lib/libMLIRNVGPUUtils.a  lib/libMLIRNVGPUTransformOps.a  lib/libMLIRNVGPUToNVVM.a  lib/libMLIRNVGPUTransforms.a  lib/libMLIROpenACCDialect.a  lib/libMLIROpenMPDialect.a  lib/libMLIROpenACCMPCommon.a  lib/libMLIRSCFTransformOps.a  lib/libMLIRShapeOpsTransforms.a  lib/libMLIRShapeDialect.a  lib/libMLIRSparseTensorPipelines.a  lib/libMLIRSCFToControlFlow.a  lib/libMLIRAffineToStandard.a  lib/libMLIRComplexToLLVM.a  lib/libMLIRComplexToStandard.a  lib/libMLIRMathToLLVM.a  lib/libMLIRMathToLibm.a  lib/libMLIRGPUToNVVMTransforms.a  lib/libMLIRGPUToGPURuntimeTransforms.a  lib/libMLIRGPUTransforms.a  lib/libMLIRBuiltinToLLVMIRTranslation.a  lib/libMLIRLLVMToLLVMIRTranslation.a  lib/libMLIRGPUToLLVMIRTranslation.a  lib/libMLIRAsyncToLLVM.a  lib/libMLIRAsyncDialect.a  lib/libMLIRConvertToLLVMPass.a  lib/libMLIRConvertToLLVMInterface.a  lib/libMLIRReconcileUnrealizedCasts.a  lib/libMLIRComplexToLibm.a  lib/libMLIRMemRefToLLVM.a  lib/libMLIRVectorToLLVMPass.a  lib/libMLIRAMXTransforms.a  lib/libMLIRAMXDialect.a  lib/libMLIRArmNeonDialect.a  lib/libMLIRArmSMETransforms.a  lib/libMLIRArmSVETransforms.a  lib/libMLIRArmSVEDialect.a  lib/libMLIRVectorToArmSME.a  lib/libMLIRArmSMEDialect.a  lib/libMLIRSparseTe
ect.a  lib/libMLIRSparseTensorTransforms.a  lib/libMLIRLinalgTransforms.a  lib/libMLIRMemRefTransforms.a  lib/libMLIRArithTransforms.a  lib/libMLIRFuncTransforms.a  lib/libMLIRNVGPUDialect.a  lib/libMLIRFuncToLLVM.a  lib/libMLIRArithToLLVM.a  lib/libMLIRControlFlowToLLVM.a  lib/libMLIRSCFTransforms.a  lib/libMLIRSparseTensorUtils.a  lib/libMLIRSPIRVModuleCombiner.a  lib/libMLIRSPIRVTransforms.a  lib/libMLIRSPIRVConversion.a  lib/libMLIRSPIRVUtils.a  lib/libMLIRTensorInferTypeOpInterfaceImpl.a  lib/libMLIRTensorTilingInterfaceImpl.a  lib/libMLIRLinalgUtils.a  lib/libMLIRTensorTransformOps.a  lib/libMLIRTensorTransforms.a  lib/libMLIRAffineTransforms.a  lib/libMLIRSCFUtils.a  lib/libMLIRTensorUtils.a  lib/libMLIRTosaShardingInterfaceImpl.a  lib/libMLIRShardingInterface.a  lib/libMLIRMeshDialect.a  lib/libMLIRTosaTransforms.a  lib/libMLIRTransformDebugExtension.a  lib/libMLIRTransformLoopExtension.a  lib/libMLIRTransformPDLExtension.a  lib/libMLIRTransformDialectTransforms.a  lib/libMLIRVectorTransformOps.a  lib/libMLIRTransformDialect.a  lib/libMLIRTransformDialectUtils.a  lib/libMLIRVectorToLLVM.a  lib/libMLIRVectorToSCF.a  lib/libMLIRVectorTransforms.a  lib/libMLIRAffineUtils.a  lib/libMLIRBufferizationTransforms.a  lib/libMLIRLinalgDialect.a  lib/libMLIRBufferizationDialect.a  lib/libMLIRMathDialect.a  lib/libMLIRSparseTensorDialect.a  lib/libMLIRTilingInterface.a  lib/libMLIRMemRefUtils.a  lib/libMLIRX86VectorTransforms.a  lib/libMLIRVectorUtils.a  lib/libMLIRAffineAnalysis.a  lib/libMLIRSCFDialect.a  lib/libMLIRVectorDialect.a  lib/libMLIRMaskableOpInterface.a  lib/libMLIRMaskingOpInterface.a  lib/libMLIRX86VectorDialect.a  lib/libMLIRLLVMCommonConversion.a  lib/libMLIRSPIRVTarget.a  lib/libMLIRSPIRVSerialization.a  lib/libMLIRSPIRVBinaryUtils.a  lib/libMLIRSPIRVDialect.a  lib/libMLIRNVVMTarget.a  lib/libMLIRNVVMToLLVMIRTranslation.a  lib/libMLIRROCDLTarget.a  lib/libMLIRGPUDialect.a  lib/libMLIRROCDLToLLVMIRTranslation.a  lib/libMLIRROCDLDialect.a  lib/libMLIRTargetLLVM.a  lib/libMLIRTargetLLVMIRExport.a  lib/libMLIRDLTIDialect.a  lib/libMLIRLLVMIRTransforms.a  lib/libMLIRTransforms.a  lib/libMLIRCopyOpInterface.a  lib/libMLIRRuntimeVerifiableOpInterface.a  lib/libMLIRNVVMDialect.a  lib/libMLIRTranslateLib.a  lib/libMLIRParser.a  lib/libMLIRBytecodeReader.a  lib/libMLIRAsmParser.a  lib/libMLIRExecutionEngineUtils.a  lib/libMLIRTestDynDialect.a  lib/libMLIRTosaTestPasses.a  lib/libMLIRTosaDialect.a  lib/libMLIRQuantUtils.a  lib/libMLIRQuantDialect.a  lib/libMLIRTensorDialect.a  lib/libMLIRAffineDialect.a  lib/libMLIRMemRefDialect.a  lib/libMLIRDialectUtils.a  lib/libMLIRArithUtils.a  lib/libMLIRComplexDialect.a  lib/libMLIRArithAttrToLLVMConversion.a  lib/libMLIRLLVMDialect.a  lib/libMLIRMemorySlotInterfaces.a  lib/libMLIRShapedOpInterfaces.a  lib/libMLIRParallelCombiningOpInterface.a  lib/libMLIRVectorInterfaces.a  lib/libMLIRTransformUtils.a  lib/libMLIRSubsetOpInterface.a  lib/libMLIRValueBoundsOpInterface.a  lib/libMLIRDestinationStyleOpInterface.a  lib/libMLIRRewrite.a  lib/libMLIRRewritePDL.a  lib/libMLIRPDLToPDLInterp.a  lib/libMLIRPDLInterpDialect.a  lib/libMLIRPDLDialect.a  lib/libMLIRFuncAllExtensions.a  lib/libMLIRFuncInlinerExtension.a  lib/libMLIRControlFlowDialect.a  lib/libMLIRArithDialect.a  lib/libMLIRUBDialect.a  lib/libMLIRCastInterfaces.a  lib/libMLIRDialect.a  lib/libMLIRInferIntRangeCommon.a  lib/libMLIRFuncDialect.a  lib/libclang-cpp.so.18.1  lib/libMLIRPass.a  lib/libMLIRAnalysis.a  lib/libMLIRLoopLikeInterface.a  lib/libMLIRFunctionInterfaces.a  lib/libMLIRSideEffectInterfaces.a  lib/libMLIRCallInterfaces.a  lib/libMLIRControlFlowInterfaces.a  lib/libMLIRInferTypeOpInterface.a  lib/libMLIRPresburger.a  lib/libMLIRViewLikeInterface.a  lib/libMLIRInferIntRangeInterface.a  lib/libMLIRDataLayoutInterfaces.a  lib/libMLIRIR.a  lib/libMLIRSupport.a  lib/libLLVM.so.18.1 && :
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Running pass 'PPC Merge String Pool' on module 'lib/libFortranSemantics.a(resolve-directives.cpp.o at 306474380)'.
clang++: error: unable to execute command: Segmentation fault
clang++: error: linker command failed due to signal (use -v to see invocation)

on ppc64:

FAILED: bin/llvm-exegesis 
: && /builddir/llvm-18.1.6/boot-clang++ -ffile-prefix-map=/builddir/llvm-18.1.6=. -Wformat -Werror=format-security -ftrivial-auto-var-init=zero -fstack-clash-protection -fno-omit-frame-pointer -flto=thin -mcpu=970 -mtune=power9 -O2 -fPIC -g1 -stdlib=libc++ -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 -flto=thin -O3 -DNDEBUG -Wl,-z,pack-relative-relocs -fno-omit-frame-pointer -flto=thin -fuse-ld=/usr/lib/llvm-bootstrap/bin/ld.lld -stdlib=libc++ -fuse-ld=lld -Wl,--color-diagnostics -flto=thin -Wl,--thinlto-cache-dir=/builddir/llvm-18.1.6/build/lto.cache    -Wl,--gc-sections tools/llvm-exegesis/CMakeFiles/llvm-exegesis.dir/llvm-exegesis.cpp.o -o bin/llvm-exegesis  -Wl,-rpath,"\$ORIGIN/../lib:"  lib/libLLVMAArch64AsmParser.a  lib/libLLVMAMDGPUAsmParser.a  lib/libLLVMARMAsmParser.a  lib/libLLVMAVRAsmParser.a  lib/libLLVMBPFAsmParser.a  lib/libLLVMHexagonAsmParser.a  lib/libLLVMLanaiAsmParser.a  lib/libLLVMLoongArchAsmParser.a  lib/libLLVMMipsAsmParser.a  lib/libLLVMMSP430AsmParser.a  lib/libLLVMPowerPCAsmParser.a  lib/libLLVMRISCVAsmParser.a  lib/libLLVMSparcAsmParser.a  lib/libLLVMSystemZAsmParser.a  lib/libLLVMVEAsmParser.a  lib/libLLVMWebAssemblyAsmParser.a  lib/libLLVMX86AsmParser.a  lib/libLLVMAArch64CodeGen.a  lib/libLLVMAMDGPUCodeGen.a  lib/libLLVMARMCodeGen.a  lib/libLLVMAVRCodeGen.a  lib/libLLVMBPFCodeGen.a  lib/libLLVMHexagonCodeGen.a  lib/libLLVMLanaiCodeGen.a  lib/libLLVMLoongArchCodeGen.a  lib/libLLVMMipsCodeGen.a  lib/libLLVMMSP430CodeGen.a  lib/libLLVMNVPTXCodeGen.a  lib/libLLVMPowerPCCodeGen.a  lib/libLLVMRISCVCodeGen.a  lib/libLLVMSparcCodeGen.a  lib/libLLVMSystemZCodeGen.a  lib/libLLVMVECodeGen.a  lib/libLLVMWebAssemblyCodeGen.a  lib/libLLVMX86CodeGen.a  lib/libLLVMXCoreCodeGen.a  lib/libLLVMAArch64Desc.a  lib/libLLVMAMDGPUDesc.a  lib/libLLVMARMDesc.a  lib/libLLVMAVRDesc.a  lib/libLLVMBPFDesc.a  lib/libLLVMHexagonDesc.a  lib/libLLVMLanaiDesc.a  lib/libLLVMLoongArchDesc.a  lib/libLLVMMipsDesc.a  lib/libLLVMMSP430Desc.a  lib/libLLVMNVPTXDesc.a  lib/libLLVMPowerPCDesc.a  lib/libLLVMRISCVDesc.a  lib/libLLVMSparcDesc.a  lib/libLLVMSystemZDesc.a  lib/libLLVMVEDesc.a  lib/libLLVMWebAssemblyDesc.a  lib/libLLVMX86Desc.a  lib/libLLVMXCoreDesc.a  lib/libLLVMAArch64Disassembler.a  lib/libLLVMAMDGPUDisassembler.a  lib/libLLVMARMDisassembler.a  lib/libLLVMAVRDisassembler.a  lib/libLLVMBPFDisassembler.a  lib/libLLVMHexagonDisassembler.a  lib/libLLVMLanaiDisassembler.a  lib/libLLVMLoongArchDisassembler.a  lib/libLLVMMipsDisassembler.a  lib/libLLVMMSP430Disassembler.a  lib/libLLVMPowerPCDisassembler.a  lib/libLLVMRISCVDisassembler.a  lib/libLLVMSparcDisassembler.a  lib/libLLVMSystemZDisassembler.a  lib/libLLVMVEDisassembler.a  lib/libLLVMWebAssemblyDisassembler.a  lib/libLLVMX86Disassembler.a  lib/libLLVMXCoreDisassembler.a  lib/libLLVMAArch64Info.a  lib/libLLVMAMDGPUInfo.a  lib/libLLVMARMInfo.a  lib/libLLVMAVRInfo.a  lib/libLLVMBPFInfo.a  lib/libLLVMHexagonInfo.a  lib/libLLVMLanaiInfo.a  lib/libLLVMLoongArchInfo.a  lib/libLLVMMipsInfo.a  lib/libLLVMMSP430Info.a  lib/libLLVMNVPTXInfo.a  lib/libLLVMPowerPCInfo.a  lib/libLLVMRISCVInfo.a  lib/libLLVMSparcInfo.a  lib/libLLVMSystemZInfo.a  lib/libLLVMVEInfo.a  lib/libLLVMWebAssemblyInfo.a  lib/libLLVMX86Info.a  lib/libLLVMXCoreInfo.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMMC.a  lib/libLLVMMCParser.a  lib/libLLVMSupport.a  lib/libLLVMTargetParser.a  lib/libLLVMExegesis.a  lib/libLLVMExegesisX86.a  lib/libLLVMExegesisAArch64.a  lib/libLLVMExegesisPowerPC.a  lib/libLLVMExegesisMips.a  lib/libLLVMMIRParser.a  lib/libLLVMHexagonAsmParser.a  li
  lib/libLLVMAMDGPUInfo.a  lib/libLLVMAMDGPUUtils.a  lib/libLLVMARMDesc.a  lib/libLLVMARMInfo.a  lib/libLLVMARMUtils.a  lib/libLLVMHexagonDesc.a  lib/libLLVMHexagonInfo.a  lib/libLLVMLanaiDesc.a  lib/libLLVMLanaiInfo.a  lib/libLLVMLoongArchDesc.a  lib/libLLVMLoongArchInfo.a  lib/libLLVMRISCVDesc.a  lib/libLLVMRISCVInfo.a  lib/libLLVMSystemZDesc.a  lib/libLLVMSystemZInfo.a  lib/libLLVMWebAssemblyDesc.a  lib/libLLVMWebAssemblyInfo.a  lib/libLLVMX86AsmParser.a  lib/libLLVMX86CodeGen.a  lib/libLLVMX86Desc.a  lib/libLLVMX86Disassembler.a  lib/libLLVMX86Info.a  lib/libLLVMAArch64AsmParser.a  lib/libLLVMAArch64CodeGen.a  lib/libLLVMAArch64Disassembler.a  lib/libLLVMAArch64Desc.a  lib/libLLVMAArch64Info.a  lib/libLLVMAArch64Utils.a  lib/libLLVMPowerPCAsmParser.a  lib/libLLVMPowerPCCodeGen.a  lib/libLLVMPowerPCDesc.a  lib/libLLVMPowerPCDisassembler.a  lib/libLLVMPowerPCInfo.a  lib/libLLVMMipsAsmParser.a  lib/libLLVMMipsCodeGen.a  lib/libLLVMAsmPrinter.a  lib/libLLVMMipsDesc.a  lib/libLLVMMipsDisassembler.a  lib/libLLVMMipsInfo.a  lib/libLLVMExegesis.a  lib/libLLVMGlobalISel.a  lib/libLLVMSelectionDAG.a  lib/libLLVMMCDisassembler.a  lib/libLLVMMCA.a  lib/libLLVMObjectYAML.a  lib/libLLVMOrcJIT.a  lib/libLLVMPasses.a  lib/libLLVMCFGuard.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMHipStdPar.a  lib/libLLVMIRPrinter.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMCoroutines.a  lib/libLLVMipo.a  lib/libLLVMVectorize.a  lib/libLLVMInstrumentation.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMLinker.a  lib/libLLVMTransformUtils.a  lib/libLLVMExecutionEngine.a  lib/libLLVMTarget.a  lib/libLLVMBitWriter.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMJITLink.a  lib/libLLVMOrcTargetProcess.a  lib/libLLVMOrcShared.a  lib/libLLVMWindowsDriver.a  lib/libLLVMOption.a  lib/libLLVMRuntimeDyld.a  lib/libLLVMObject.a  lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMIRReader.a  lib/libLLVMBitReader.a  lib/libLLVMAsmParser.a  lib/libLLVMTextAPI.a  lib/libLLVMCore.a  lib/libLLVMBinaryFormat.a  lib/libLLVMTargetParser.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMSupport.a  -lrt  -ldl  -lm  /usr/lib/libz.so  /usr/lib/libzstd.so  /usr/lib/libcurses.so  lib/libLLVMDemangle.a && :
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Running pass 'PPC Merge String Pool' on module 'lib/libLLVMX86CodeGen.a(X86TargetMachine.cpp.o at 20709228)'.
clang++: error: unable to execute command: Segmentation fault
clang++: error: linker command failed due to signal (use -v to see invocation)

18.1.5 was fine, so given the error i assume it was that PPCMergeStringPool change specifically (no manual bisect).

backtrace on ppc64le: https://img.ayaya.dev/T096XJsi3Clz (issue body limit) (i don't have one for ppc64), rerunning it manually seems to have failed on exegesis instead of flang too:

FAILED: bin/llvm-exegesis 
: && /builddir/llvm-18.1.6/boot-clang++ -ffile-prefix-map=/builddir/llvm-18.1.6=. -Wformat -Werror=format-security -ftrivial-auto-var-init=zero -fstack-clash-protection -fno-omit-frame-pointer -flto=thin -mtune=power9 -O2 -fPIC -g1 -stdlib=libc++ -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 -flto=thin -O3 -DNDEBUG -Wl,-z,pack-relative-relocs -fno-omit-frame-pointer -flto=thin -Wl,--thinlto-cache-policy=cache_size_bytes=8192m,--thinlto-cache-dir=/cbuild_cache/link-cache -fuse-ld=/usr/lib/llvm-bootstrap/bin/ld.lld -stdlib=libc++ -fuse-ld=lld -Wl,--color-diagnostics -flto=thin -Wl,--thinlto-cache-dir=/builddir/llvm-18.1.6/build/lto.cache    -Wl,--gc-sections tools/llvm-exegesis/CMakeFiles/llvm-exegesis.dir/llvm-exegesis.cpp.o -o bin/llvm-exegesis  -Wl,-rpath,"\$ORIGIN/../lib:"  lib/libLLVMAArch64AsmParser.a  lib/libLLVMAMDGPUAsmParser.a  lib/libLLVMARMAsmParser.a  lib/libLLVMAVRAsmParser.a  lib/libLLVMBPFAsmParser.a  lib/libLLVMHexagonAsmParser.a  lib/libLLVMLanaiAsmParser.a  lib/libLLVMLoongArchAsmParser.a  lib/libLLVMMipsAsmParser.a  lib/libLLVMMSP430AsmParser.a  lib/libLLVMPowerPCAsmParser.a  lib/libLLVMRISCVAsmParser.a  lib/libLLVMSparcAsmParser.a  lib/libLLVMSystemZAsmParser.a  lib/libLLVMVEAsmParser.a  lib/libLLVMWebAssemblyAsmParser.a  lib/libLLVMX86AsmParser.a  lib/libLLVMAArch64CodeGen.a  lib/libLLVMAMDGPUCodeGen.a  lib/libLLVMARMCodeGen.a  lib/libLLVMAVRCodeGen.a  lib/libLLVMBPFCodeGen.a  lib/libLLVMHexagonCodeGen.a  lib/libLLVMLanaiCodeGen.a  lib/libLLVMLoongArchCodeGen.a  lib/libLLVMMipsCodeGen.a  lib/libLLVMMSP430CodeGen.a  lib/libLLVMNVPTXCodeGen.a  lib/libLLVMPowerPCCodeGen.a  lib/libLLVMRISCVCodeGen.a  lib/libLLVMSparcCodeGen.a  lib/libLLVMSystemZCodeGen.a  lib/libLLVMVECodeGen.a  lib/libLLVMWebAssemblyCodeGen.a  lib/libLLVMX86CodeGen.a  lib/libLLVMXCoreCodeGen.a  lib/libLLVMAArch64Desc.a  lib/libLLVMAMDGPUDesc.a  lib/libLLVMARMDesc.a  lib/libLLVMAVRDesc.a  lib/libLLVMBPFDesc.a  lib/libLLVMHexagonDesc.a  lib/libLLVMLanaiDesc.a  lib/libLLVMLoongArchDesc.a  lib/libLLVMMipsDesc.a  lib/libLLVMMSP430Desc.a  lib/libLLVMNVPTXDesc.a  lib/libLLVMPowerPCDesc.a  lib/libLLVMRISCVDesc.a  lib/libLLVMSparcDesc.a  lib/libLLVMSystemZDesc.a  lib/libLLVMVEDesc.a  lib/libLLVMWebAssemblyDesc.a  lib/libLLVMX86Desc.a  lib/libLLVMXCoreDesc.a  lib/libLLVMAArch64Disassembler.a  lib/libLLVMAMDGPUDisassembler.a  lib/libLLVMARMDisassembler.a  lib/libLLVMAVRDisassembler.a  lib/libLLVMBPFDisassembler.a  lib/libLLVMHexagonDisassembler.a  lib/libLLVMLanaiDisassembler.a  lib/libLLVMLoongArchDisassembler.a  lib/libLLVMMipsDisassembler.a  lib/libLLVMMSP430Disassembler.a  lib/libLLVMPowerPCDisassembler.a  lib/libLLVMRISCVDisassembler.a  lib/libLLVMSparcDisassembler.a  lib/libLLVMSystemZDisassembler.a  lib/libLLVMVEDisassembler.a  lib/libLLVMWebAssemblyDisassembler.a  lib/libLLVMX86Disassembler.a  lib/libLLVMXCoreDisassembler.a  lib/libLLVMAArch64Info.a  lib/libLLVMAMDGPUInfo.a  lib/libLLVMARMInfo.a  lib/libLLVMAVRInfo.a  lib/libLLVMBPFInfo.a  lib/libLLVMHexagonInfo.a  lib/libLLVMLanaiInfo.a  lib/libLLVMLoongArchInfo.a  lib/libLLVMMipsInfo.a  lib/libLLVMMSP430Info.a  lib/libLLVMNVPTXInfo.a  lib/libLLVMPowerPCInfo.a  lib/libLLVMRISCVInfo.a  lib/libLLVMSparcInfo.a  lib/libLLVMSystemZInfo.a  lib/libLLVMVEInfo.a  lib/libLLVMWebAssemblyInfo.a  lib/libLLVMX86Info.a  lib/libLLVMXCoreInfo.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMMC.a  lib/libLLVMMCParser.a  lib/libLLVMSupport.a  lib/libLLVMTargetParser.a  lib/libLLVMExegesis.a  lib/libLLVMExegesisX86.a  lib/libLLVMExegesisAArch64.a  lib/libLLVMExegesisPowerPC.a  lib/libLLVMExegesisMips.a  lib/libLLVMMIRParser.a  lib/libLLVMHexagonAsmParser.a  lib/libLLVMLanaiAsmParser.a  lib/libLLVMWebAssemblyUtils.a  lib/libLLVMAMDGPUDesc.a  lib/libLLVMAMDGPUInfo.a  lib/libLLVMAMDGPUUtils.a  lib/libLLVMARMDesc.a  lib/libLLVMARMInfo.a  lib/libLLVMARMUtils.a  lib/libLLVMHexagonDesc.a  lib/libLLVMHexagonInfo.a  lib/libLLVMLanaiDesc.a  lib/libLLVMLanaiInfo.a  lib/libLLVMLoongArchDesc.a  lib/libLLVMLoongArchInfo.a  lib/libLLVMRISCVDesc.a  lib/libLLVMRISCVInfo.a  lib/libLLVMSystemZDesc.a  lib/libLLVMSystemZInfo.a  lib/libLLVMWebAssemblyDesc.a  lib/libLLVMWebAssemblyInfo.a  lib/libLLVMX86AsmParser.a  lib/libLLVMX86CodeGen.a  lib/libLLVMX86Desc.a  lib/libLLVMX86Disassembler.a  lib/libLLVMX86Info.a  lib/libLLVMAArch64AsmParser.a  lib/libLLVMAArch64CodeGen.a  lib/libLLVMAArch64Disassembler.a  lib/libLLVMAArch64Desc.a  lib/libLLVMAArch64Info.a  lib/libLLVMAArch64Utils.a  lib/libLLVMPowerPCAsmParser.a  lib/libLLVMPowerPCCodeGen.a  lib/libLLVMPowerPCDesc.a  lib/libLLVMPowerPCDisassembler.a  lib/libLLVMPowerPCInfo.a  lib/libLLVMMipsAsmParser.a  lib/libLLVMMipsCodeGen.a  lib/libLLVMAsmPrinter.a  lib/libLLVMMipsDesc.a  lib/libLLVMMipsDisassembler.a  lib/libLLVMMipsInfo.a  lib/libLLVMExegesis.a  lib/libLLVMGlobalISel.a  lib/libLLVMSelectionDAG.a  lib/libLLVMMCDisassembler.a  lib/libLLVMMCA.a  lib/libLLVMObjectYAML.a  lib/libLLVMOrcJIT.a  lib/libLLVMPasses.a  lib/libLLVMCFGuard.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMHipStdPar.a  lib/libLLVMIRPrinter.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMCoroutines.a  lib/libLLVMipo.a  lib/libLLVMVectorize.a  lib/libLLVMInstrumentation.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMLinker.a  lib/libLLVMTransformUtils.a  lib/libLLVMExecutionEngine.a  lib/libLLVMTarget.a  lib/libLLVMBitWriter.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMJITLink.a  lib/libLLVMOrcTargetProcess.a  lib/libLLVMOrcShared.a  lib/libLLVMWindowsDriver.a  lib/libLLVMOption.a  lib/libLLVMRuntimeDyld.a  lib/libLLVMObject.a  lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMIRReader.a  lib/libLLVMBitReader.a  lib/libLLVMAsmParser.a  lib/libLLVMTextAPI.a  lib/libLLVMCore.a  lib/libLLVMBinaryFormat.a  lib/libLLVMTargetParser.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMSupport.a  -lrt  -ldl  -lm  /usr/lib/libz.so  /usr/lib/libzstd.so  /usr/lib/libcurses.so  lib/libLLVMDemangle.a && :
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Running pass 'PPC Merge String Pool' on module 'lib/libLLVMX86CodeGen.a(X86TargetMachine.cpp.o at 20688330)'.
clang++: error: unable to execute command: Segmentation fault (core dumped)

cc @nikic

[llvmbot]

@llvm/issue-subscribers-backend-powerpc

Author: alice (nekopsykose)

probably caused by https://github.com//pull/91557

on ppc64le:

FAILED: bin/flang-new 
: && /builddir/llvm-18.1.6/boot-clang++ -ffile-prefix-map=/builddir/llvm-18.1.6=. -Wformat -Werror=format-security -ftrivial-auto-var-init=zero -fstack-clash-protection -fno-omit-frame-pointer -flto=thin -mtune=power9 -O2 -fPIC -g1 -stdlib=libc++ -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 -flto=thin -Wno-deprecated-copy -Wno-string-conversion -Wno-ctad-maybe-unsupported -Wno-unused-command-line-argument -Wstring-conversion           -Wcovered-switch-default -Wno-nested-anon-types -O3 -DNDEBUG -Wl,-z,pack-relative-relocs -fno-omit-frame-pointer -flto=thin -fuse-ld=/usr/lib/llvm-bootstrap/bin/ld.lld -stdlib=libc++ -fuse-ld=lld -Wl,--color-diagnostics -flto=thin -Wl,--thinlto-cache-dir=/builddir/llvm-18.1.6/build/lto.cache   -Wl,--export-dynamic  -Wl,--gc-sections tools/flang/tools/flang-driver/CMakeFiles/flang-new.dir/driver.cpp.o tools/flang/tools/flang-driver/CMakeFiles/flang-new.dir/fc1_main.cpp.o -o bin/flang-new -L/builddir/llvm-18.1.6/build/./lib -Wl,-rpath,"\$ORIGIN/../lib:/builddir/llvm-18.1.6/build/./lib:/builddir/llvm-18.1.6/build/lib:"  lib/libflangFrontend.a  lib/libflangFrontendTool.a  lib/libflangFrontend.a  lib/libFortranLower.a  lib/libFortranSemantics.a  lib/libFortranEvaluate.a  lib/libFortranParser.a  lib/libFortranDecimal.a  lib/libFortranCommon.a  lib/libFIRTransforms.a  lib/libFIRCodeGen.a  lib/libMLIRMathToFuncs.a  lib/libHLFIRTransforms.a  lib/libFIRAnalysis.a  lib/libFIRBuilder.a  lib/libFIRSupport.a  lib/libMLIROpenACCToLLVMIRTranslation.a  lib/libMLIROpenMPToLLVMIRTranslation.a  lib/libHLFIRDialect.a  lib/libFIRDialect.a  lib/libFIRDialectSupport.a  lib/libMLIROpenMPToLLVM.a  lib/libMLIRTargetLLVMIRImport.a  lib/libMLIRAffineTransformOps.a  lib/libMLIRAMDGPUTransforms.a  lib/libMLIRAMDGPUUtils.a  lib/libMLIRAMDGPUDialect.a  lib/libMLIRArithValueBoundsOpInterfaceImpl.a  lib/libMLIRAsyncTransforms.a  lib/libMLIRBufferizationPipelines.a  lib/libMLIRBufferizationTransformOps.a  lib/libMLIRControlFlowTransforms.a  lib/libMLIREmitCTransforms.a  lib/libMLIREmitCDialect.a  lib/libMLIRFuncTransformOps.a  lib/libMLIRGPUTransformOps.a  lib/libMLIRGPUPipelines.a  lib/libMLIRIndexToLLVM.a  lib/libMLIRNVVMToLLVM.a  lib/libMLIRIRDL.a  lib/libMLIRMathTransforms.a  lib/libMLIRMemRefTransformOps.a  lib/libMLIRMeshTransforms.a  lib/libMLIRMLProgramTransforms.a  lib/libMLIRMLProgramDialect.a  lib/libMLIRNVGPUUtils.a  lib/libMLIRNVGPUTransformOps.a  lib/libMLIRNVGPUToNVVM.a  lib/libMLIRNVGPUTransforms.a  lib/libMLIROpenACCDialect.a  lib/libMLIROpenMPDialect.a  lib/libMLIROpenACCMPCommon.a  lib/libMLIRSCFTransformOps.a  lib/libMLIRShapeOpsTransforms.a  lib/libMLIRShapeDialect.a  lib/libMLIRSparseTensorPipelines.a  lib/libMLIRSCFToControlFlow.a  lib/libMLIRAffineToStandard.a  lib/libMLIRComplexToLLVM.a  lib/libMLIRComplexToStandard.a  lib/libMLIRMathToLLVM.a  lib/libMLIRMathToLibm.a  lib/libMLIRGPUToNVVMTransforms.a  lib/libMLIRGPUToGPURuntimeTransforms.a  lib/libMLIRGPUTransforms.a  lib/libMLIRBuiltinToLLVMIRTranslation.a  lib/libMLIRLLVMToLLVMIRTranslation.a  lib/libMLIRGPUToLLVMIRTranslation.a  lib/libMLIRAsyncToLLVM.a  lib/libMLIRAsyncDialect.a  lib/libMLIRConvertToLLVMPass.a  lib/libMLIRConvertToLLVMInterface.a  lib/libMLIRReconcileUnrealizedCasts.a  lib/libMLIRComplexToLibm.a  lib/libMLIRMemRefToLLVM.a  lib/libMLIRVectorToLLVMPass.a  lib/libMLIRAMXTransforms.a  lib/libMLIRAMXDialect.a  lib/libMLIRArmNeonDialect.a  lib/libMLIRArmSMETransforms.a  lib/libMLIRArmSVETransforms.a  lib/libMLIRArmSVEDialect.a  lib/libMLIRVectorToArmSME.a  lib/libMLIRArmSMEDialect.a  lib/libMLIRSparseTe
ect.a  lib/libMLIRSparseTensorTransforms.a  lib/libMLIRLinalgTransforms.a  lib/libMLIRMemRefTransforms.a  lib/libMLIRArithTransforms.a  lib/libMLIRFuncTransforms.a  lib/libMLIRNVGPUDialect.a  lib/libMLIRFuncToLLVM.a  lib/libMLIRArithToLLVM.a  lib/libMLIRControlFlowToLLVM.a  lib/libMLIRSCFTransforms.a  lib/libMLIRSparseTensorUtils.a  lib/libMLIRSPIRVModuleCombiner.a  lib/libMLIRSPIRVTransforms.a  lib/libMLIRSPIRVConversion.a  lib/libMLIRSPIRVUtils.a  lib/libMLIRTensorInferTypeOpInterfaceImpl.a  lib/libMLIRTensorTilingInterfaceImpl.a  lib/libMLIRLinalgUtils.a  lib/libMLIRTensorTransformOps.a  lib/libMLIRTensorTransforms.a  lib/libMLIRAffineTransforms.a  lib/libMLIRSCFUtils.a  lib/libMLIRTensorUtils.a  lib/libMLIRTosaShardingInterfaceImpl.a  lib/libMLIRShardingInterface.a  lib/libMLIRMeshDialect.a  lib/libMLIRTosaTransforms.a  lib/libMLIRTransformDebugExtension.a  lib/libMLIRTransformLoopExtension.a  lib/libMLIRTransformPDLExtension.a  lib/libMLIRTransformDialectTransforms.a  lib/libMLIRVectorTransformOps.a  lib/libMLIRTransformDialect.a  lib/libMLIRTransformDialectUtils.a  lib/libMLIRVectorToLLVM.a  lib/libMLIRVectorToSCF.a  lib/libMLIRVectorTransforms.a  lib/libMLIRAffineUtils.a  lib/libMLIRBufferizationTransforms.a  lib/libMLIRLinalgDialect.a  lib/libMLIRBufferizationDialect.a  lib/libMLIRMathDialect.a  lib/libMLIRSparseTensorDialect.a  lib/libMLIRTilingInterface.a  lib/libMLIRMemRefUtils.a  lib/libMLIRX86VectorTransforms.a  lib/libMLIRVectorUtils.a  lib/libMLIRAffineAnalysis.a  lib/libMLIRSCFDialect.a  lib/libMLIRVectorDialect.a  lib/libMLIRMaskableOpInterface.a  lib/libMLIRMaskingOpInterface.a  lib/libMLIRX86VectorDialect.a  lib/libMLIRLLVMCommonConversion.a  lib/libMLIRSPIRVTarget.a  lib/libMLIRSPIRVSerialization.a  lib/libMLIRSPIRVBinaryUtils.a  lib/libMLIRSPIRVDialect.a  lib/libMLIRNVVMTarget.a  lib/libMLIRNVVMToLLVMIRTranslation.a  lib/libMLIRROCDLTarget.a  lib/libMLIRGPUDialect.a  lib/libMLIRROCDLToLLVMIRTranslation.a  lib/libMLIRROCDLDialect.a  lib/libMLIRTargetLLVM.a  lib/libMLIRTargetLLVMIRExport.a  lib/libMLIRDLTIDialect.a  lib/libMLIRLLVMIRTransforms.a  lib/libMLIRTransforms.a  lib/libMLIRCopyOpInterface.a  lib/libMLIRRuntimeVerifiableOpInterface.a  lib/libMLIRNVVMDialect.a  lib/libMLIRTranslateLib.a  lib/libMLIRParser.a  lib/libMLIRBytecodeReader.a  lib/libMLIRAsmParser.a  lib/libMLIRExecutionEngineUtils.a  lib/libMLIRTestDynDialect.a  lib/libMLIRTosaTestPasses.a  lib/libMLIRTosaDialect.a  lib/libMLIRQuantUtils.a  lib/libMLIRQuantDialect.a  lib/libMLIRTensorDialect.a  lib/libMLIRAffineDialect.a  lib/libMLIRMemRefDialect.a  lib/libMLIRDialectUtils.a  lib/libMLIRArithUtils.a  lib/libMLIRComplexDialect.a  lib/libMLIRArithAttrToLLVMConversion.a  lib/libMLIRLLVMDialect.a  lib/libMLIRMemorySlotInterfaces.a  lib/libMLIRShapedOpInterfaces.a  lib/libMLIRParallelCombiningOpInterface.a  lib/libMLIRVectorInterfaces.a  lib/libMLIRTransformUtils.a  lib/libMLIRSubsetOpInterface.a  lib/libMLIRValueBoundsOpInterface.a  lib/libMLIRDestinationStyleOpInterface.a  lib/libMLIRRewrite.a  lib/libMLIRRewritePDL.a  lib/libMLIRPDLToPDLInterp.a  lib/libMLIRPDLInterpDialect.a  lib/libMLIRPDLDialect.a  lib/libMLIRFuncAllExtensions.a  lib/libMLIRFuncInlinerExtension.a  lib/libMLIRControlFlowDialect.a  lib/libMLIRArithDialect.a  lib/libMLIRUBDialect.a  lib/libMLIRCastInterfaces.a  lib/libMLIRDialect.a  lib/libMLIRInferIntRangeCommon.a  lib/libMLIRFuncDialect.a  lib/libclang-cpp.so.18.1  lib/libMLIRPass.a  lib/libMLIRAnalysis.a  lib/libMLIRLoopLikeInterface.a  lib/libMLIRFunctionInterfaces.a  lib/libMLIRSideEffectInterfaces.a  lib/libMLIRCallInterfaces.a  lib/libMLIRControlFlowInterfaces.a  lib/libMLIRInferTypeOpInterface.a  lib/libMLIRPresburger.a  lib/libMLIRViewLikeInterface.a  lib/libMLIRInferIntRangeInterface.a  lib/libMLIRDataLayoutInterfaces.a  lib/libMLIRIR.a  lib/libMLIRSupport.a  lib/libLLVM.so.18.1 && :
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Running pass 'PPC Merge String Pool' on module 'lib/libFortranSemantics.a(resolve-directives.cpp.o at 306474380)'.
clang++: error: unable to execute command: Segmentation fault
clang++: error: linker command failed due to signal (use -v to see invocation)

on ppc64:

FAILED: bin/llvm-exegesis 
: && /builddir/llvm-18.1.6/boot-clang++ -ffile-prefix-map=/builddir/llvm-18.1.6=. -Wformat -Werror=format-security -ftrivial-auto-var-init=zero -fstack-clash-protection -fno-omit-frame-pointer -flto=thin -mcpu=970 -mtune=power9 -O2 -fPIC -g1 -stdlib=libc++ -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 -flto=thin -O3 -DNDEBUG -Wl,-z,pack-relative-relocs -fno-omit-frame-pointer -flto=thin -fuse-ld=/usr/lib/llvm-bootstrap/bin/ld.lld -stdlib=libc++ -fuse-ld=lld -Wl,--color-diagnostics -flto=thin -Wl,--thinlto-cache-dir=/builddir/llvm-18.1.6/build/lto.cache    -Wl,--gc-sections tools/llvm-exegesis/CMakeFiles/llvm-exegesis.dir/llvm-exegesis.cpp.o -o bin/llvm-exegesis  -Wl,-rpath,"\$ORIGIN/../lib:"  lib/libLLVMAArch64AsmParser.a  lib/libLLVMAMDGPUAsmParser.a  lib/libLLVMARMAsmParser.a  lib/libLLVMAVRAsmParser.a  lib/libLLVMBPFAsmParser.a  lib/libLLVMHexagonAsmParser.a  lib/libLLVMLanaiAsmParser.a  lib/libLLVMLoongArchAsmParser.a  lib/libLLVMMipsAsmParser.a  lib/libLLVMMSP430AsmParser.a  lib/libLLVMPowerPCAsmParser.a  lib/libLLVMRISCVAsmParser.a  lib/libLLVMSparcAsmParser.a  lib/libLLVMSystemZAsmParser.a  lib/libLLVMVEAsmParser.a  lib/libLLVMWebAssemblyAsmParser.a  lib/libLLVMX86AsmParser.a  lib/libLLVMAArch64CodeGen.a  lib/libLLVMAMDGPUCodeGen.a  lib/libLLVMARMCodeGen.a  lib/libLLVMAVRCodeGen.a  lib/libLLVMBPFCodeGen.a  lib/libLLVMHexagonCodeGen.a  lib/libLLVMLanaiCodeGen.a  lib/libLLVMLoongArchCodeGen.a  lib/libLLVMMipsCodeGen.a  lib/libLLVMMSP430CodeGen.a  lib/libLLVMNVPTXCodeGen.a  lib/libLLVMPowerPCCodeGen.a  lib/libLLVMRISCVCodeGen.a  lib/libLLVMSparcCodeGen.a  lib/libLLVMSystemZCodeGen.a  lib/libLLVMVECodeGen.a  lib/libLLVMWebAssemblyCodeGen.a  lib/libLLVMX86CodeGen.a  lib/libLLVMXCoreCodeGen.a  lib/libLLVMAArch64Desc.a  lib/libLLVMAMDGPUDesc.a  lib/libLLVMARMDesc.a  lib/libLLVMAVRDesc.a  lib/libLLVMBPFDesc.a  lib/libLLVMHexagonDesc.a  lib/libLLVMLanaiDesc.a  lib/libLLVMLoongArchDesc.a  lib/libLLVMMipsDesc.a  lib/libLLVMMSP430Desc.a  lib/libLLVMNVPTXDesc.a  lib/libLLVMPowerPCDesc.a  lib/libLLVMRISCVDesc.a  lib/libLLVMSparcDesc.a  lib/libLLVMSystemZDesc.a  lib/libLLVMVEDesc.a  lib/libLLVMWebAssemblyDesc.a  lib/libLLVMX86Desc.a  lib/libLLVMXCoreDesc.a  lib/libLLVMAArch64Disassembler.a  lib/libLLVMAMDGPUDisassembler.a  lib/libLLVMARMDisassembler.a  lib/libLLVMAVRDisassembler.a  lib/libLLVMBPFDisassembler.a  lib/libLLVMHexagonDisassembler.a  lib/libLLVMLanaiDisassembler.a  lib/libLLVMLoongArchDisassembler.a  lib/libLLVMMipsDisassembler.a  lib/libLLVMMSP430Disassembler.a  lib/libLLVMPowerPCDisassembler.a  lib/libLLVMRISCVDisassembler.a  lib/libLLVMSparcDisassembler.a  lib/libLLVMSystemZDisassembler.a  lib/libLLVMVEDisassembler.a  lib/libLLVMWebAssemblyDisassembler.a  lib/libLLVMX86Disassembler.a  lib/libLLVMXCoreDisassembler.a  lib/libLLVMAArch64Info.a  lib/libLLVMAMDGPUInfo.a  lib/libLLVMARMInfo.a  lib/libLLVMAVRInfo.a  lib/libLLVMBPFInfo.a  lib/libLLVMHexagonInfo.a  lib/libLLVMLanaiInfo.a  lib/libLLVMLoongArchInfo.a  lib/libLLVMMipsInfo.a  lib/libLLVMMSP430Info.a  lib/libLLVMNVPTXInfo.a  lib/libLLVMPowerPCInfo.a  lib/libLLVMRISCVInfo.a  lib/libLLVMSparcInfo.a  lib/libLLVMSystemZInfo.a  lib/libLLVMVEInfo.a  lib/libLLVMWebAssemblyInfo.a  lib/libLLVMX86Info.a  lib/libLLVMXCoreInfo.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMMC.a  lib/libLLVMMCParser.a  lib/libLLVMSupport.a  lib/libLLVMTargetParser.a  lib/libLLVMExegesis.a  lib/libLLVMExegesisX86.a  lib/libLLVMExegesisAArch64.a  lib/libLLVMExegesisPowerPC.a  lib/libLLVMExegesisMips.a  lib/libLLVMMIRParser.a  lib/libLLVMHexagonAsmParser.a  li
  lib/libLLVMAMDGPUInfo.a  lib/libLLVMAMDGPUUtils.a  lib/libLLVMARMDesc.a  lib/libLLVMARMInfo.a  lib/libLLVMARMUtils.a  lib/libLLVMHexagonDesc.a  lib/libLLVMHexagonInfo.a  lib/libLLVMLanaiDesc.a  lib/libLLVMLanaiInfo.a  lib/libLLVMLoongArchDesc.a  lib/libLLVMLoongArchInfo.a  lib/libLLVMRISCVDesc.a  lib/libLLVMRISCVInfo.a  lib/libLLVMSystemZDesc.a  lib/libLLVMSystemZInfo.a  lib/libLLVMWebAssemblyDesc.a  lib/libLLVMWebAssemblyInfo.a  lib/libLLVMX86AsmParser.a  lib/libLLVMX86CodeGen.a  lib/libLLVMX86Desc.a  lib/libLLVMX86Disassembler.a  lib/libLLVMX86Info.a  lib/libLLVMAArch64AsmParser.a  lib/libLLVMAArch64CodeGen.a  lib/libLLVMAArch64Disassembler.a  lib/libLLVMAArch64Desc.a  lib/libLLVMAArch64Info.a  lib/libLLVMAArch64Utils.a  lib/libLLVMPowerPCAsmParser.a  lib/libLLVMPowerPCCodeGen.a  lib/libLLVMPowerPCDesc.a  lib/libLLVMPowerPCDisassembler.a  lib/libLLVMPowerPCInfo.a  lib/libLLVMMipsAsmParser.a  lib/libLLVMMipsCodeGen.a  lib/libLLVMAsmPrinter.a  lib/libLLVMMipsDesc.a  lib/libLLVMMipsDisassembler.a  lib/libLLVMMipsInfo.a  lib/libLLVMExegesis.a  lib/libLLVMGlobalISel.a  lib/libLLVMSelectionDAG.a  lib/libLLVMMCDisassembler.a  lib/libLLVMMCA.a  lib/libLLVMObjectYAML.a  lib/libLLVMOrcJIT.a  lib/libLLVMPasses.a  lib/libLLVMCFGuard.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMHipStdPar.a  lib/libLLVMIRPrinter.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMCoroutines.a  lib/libLLVMipo.a  lib/libLLVMVectorize.a  lib/libLLVMInstrumentation.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMLinker.a  lib/libLLVMTransformUtils.a  lib/libLLVMExecutionEngine.a  lib/libLLVMTarget.a  lib/libLLVMBitWriter.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMJITLink.a  lib/libLLVMOrcTargetProcess.a  lib/libLLVMOrcShared.a  lib/libLLVMWindowsDriver.a  lib/libLLVMOption.a  lib/libLLVMRuntimeDyld.a  lib/libLLVMObject.a  lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMIRReader.a  lib/libLLVMBitReader.a  lib/libLLVMAsmParser.a  lib/libLLVMTextAPI.a  lib/libLLVMCore.a  lib/libLLVMBinaryFormat.a  lib/libLLVMTargetParser.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMSupport.a  -lrt  -ldl  -lm  /usr/lib/libz.so  /usr/lib/libzstd.so  /usr/lib/libcurses.so  lib/libLLVMDemangle.a && :
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Running pass 'PPC Merge String Pool' on module 'lib/libLLVMX86CodeGen.a(X86TargetMachine.cpp.o at 20709228)'.
clang++: error: unable to execute command: Segmentation fault
clang++: error: linker command failed due to signal (use -v to see invocation)

18.1.5 was fine, so given the error i assume it was that PPCMergeStringPool change specifically (no manual bisect).

backtrace on ppc64le: https://img.ayaya.dev/T096XJsi3Clz (issue body limit) (i don't have one for ppc64), rerunning it manually seems to have failed on exegesis instead of flang too:

FAILED: bin/llvm-exegesis 
: && /builddir/llvm-18.1.6/boot-clang++ -ffile-prefix-map=/builddir/llvm-18.1.6=. -Wformat -Werror=format-security -ftrivial-auto-var-init=zero -fstack-clash-protection -fno-omit-frame-pointer -flto=thin -mtune=power9 -O2 -fPIC -g1 -stdlib=libc++ -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 -flto=thin -O3 -DNDEBUG -Wl,-z,pack-relative-relocs -fno-omit-frame-pointer -flto=thin -Wl,--thinlto-cache-policy=cache_size_bytes=8192m,--thinlto-cache-dir=/cbuild_cache/link-cache -fuse-ld=/usr/lib/llvm-bootstrap/bin/ld.lld -stdlib=libc++ -fuse-ld=lld -Wl,--color-diagnostics -flto=thin -Wl,--thinlto-cache-dir=/builddir/llvm-18.1.6/build/lto.cache    -Wl,--gc-sections tools/llvm-exegesis/CMakeFiles/llvm-exegesis.dir/llvm-exegesis.cpp.o -o bin/llvm-exegesis  -Wl,-rpath,"\$ORIGIN/../lib:"  lib/libLLVMAArch64AsmParser.a  lib/libLLVMAMDGPUAsmParser.a  lib/libLLVMARMAsmParser.a  lib/libLLVMAVRAsmParser.a  lib/libLLVMBPFAsmParser.a  lib/libLLVMHexagonAsmParser.a  lib/libLLVMLanaiAsmParser.a  lib/libLLVMLoongArchAsmParser.a  lib/libLLVMMipsAsmParser.a  lib/libLLVMMSP430AsmParser.a  lib/libLLVMPowerPCAsmParser.a  lib/libLLVMRISCVAsmParser.a  lib/libLLVMSparcAsmParser.a  lib/libLLVMSystemZAsmParser.a  lib/libLLVMVEAsmParser.a  lib/libLLVMWebAssemblyAsmParser.a  lib/libLLVMX86AsmParser.a  lib/libLLVMAArch64CodeGen.a  lib/libLLVMAMDGPUCodeGen.a  lib/libLLVMARMCodeGen.a  lib/libLLVMAVRCodeGen.a  lib/libLLVMBPFCodeGen.a  lib/libLLVMHexagonCodeGen.a  lib/libLLVMLanaiCodeGen.a  lib/libLLVMLoongArchCodeGen.a  lib/libLLVMMipsCodeGen.a  lib/libLLVMMSP430CodeGen.a  lib/libLLVMNVPTXCodeGen.a  lib/libLLVMPowerPCCodeGen.a  lib/libLLVMRISCVCodeGen.a  lib/libLLVMSparcCodeGen.a  lib/libLLVMSystemZCodeGen.a  lib/libLLVMVECodeGen.a  lib/libLLVMWebAssemblyCodeGen.a  lib/libLLVMX86CodeGen.a  lib/libLLVMXCoreCodeGen.a  lib/libLLVMAArch64Desc.a  lib/libLLVMAMDGPUDesc.a  lib/libLLVMARMDesc.a  lib/libLLVMAVRDesc.a  lib/libLLVMBPFDesc.a  lib/libLLVMHexagonDesc.a  lib/libLLVMLanaiDesc.a  lib/libLLVMLoongArchDesc.a  lib/libLLVMMipsDesc.a  lib/libLLVMMSP430Desc.a  lib/libLLVMNVPTXDesc.a  lib/libLLVMPowerPCDesc.a  lib/libLLVMRISCVDesc.a  lib/libLLVMSparcDesc.a  lib/libLLVMSystemZDesc.a  lib/libLLVMVEDesc.a  lib/libLLVMWebAssemblyDesc.a  lib/libLLVMX86Desc.a  lib/libLLVMXCoreDesc.a  lib/libLLVMAArch64Disassembler.a  lib/libLLVMAMDGPUDisassembler.a  lib/libLLVMARMDisassembler.a  lib/libLLVMAVRDisassembler.a  lib/libLLVMBPFDisassembler.a  lib/libLLVMHexagonDisassembler.a  lib/libLLVMLanaiDisassembler.a  lib/libLLVMLoongArchDisassembler.a  lib/libLLVMMipsDisassembler.a  lib/libLLVMMSP430Disassembler.a  lib/libLLVMPowerPCDisassembler.a  lib/libLLVMRISCVDisassembler.a  lib/libLLVMSparcDisassembler.a  lib/libLLVMSystemZDisassembler.a  lib/libLLVMVEDisassembler.a  lib/libLLVMWebAssemblyDisassembler.a  lib/libLLVMX86Disassembler.a  lib/libLLVMXCoreDisassembler.a  lib/libLLVMAArch64Info.a  lib/libLLVMAMDGPUInfo.a  lib/libLLVMARMInfo.a  lib/libLLVMAVRInfo.a  lib/libLLVMBPFInfo.a  lib/libLLVMHexagonInfo.a  lib/libLLVMLanaiInfo.a  lib/libLLVMLoongArchInfo.a  lib/libLLVMMipsInfo.a  lib/libLLVMMSP430Info.a  lib/libLLVMNVPTXInfo.a  lib/libLLVMPowerPCInfo.a  lib/libLLVMRISCVInfo.a  lib/libLLVMSparcInfo.a  lib/libLLVMSystemZInfo.a  lib/libLLVMVEInfo.a  lib/libLLVMWebAssemblyInfo.a  lib/libLLVMX86Info.a  lib/libLLVMXCoreInfo.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMMC.a  lib/libLLVMMCParser.a  lib/libLLVMSupport.a  lib/libLLVMTargetParser.a  lib/libLLVMExegesis.a  lib/libLLVMExegesisX86.a  lib/libLLVMExegesisAArch64.a  lib/libLLVMExegesisPowerPC.a  lib/libLLVMExegesisMips.a  lib/libLLVMMIRParser.a  lib/libLLVMHexagonAsmParser.a  lib/libLLVMLanaiAsmParser.a  lib/libLLVMWebAssemblyUtils.a  lib/libLLVMAMDGPUDesc.a  lib/libLLVMAMDGPUInfo.a  lib/libLLVMAMDGPUUtils.a  lib/libLLVMARMDesc.a  lib/libLLVMARMInfo.a  lib/libLLVMARMUtils.a  lib/libLLVMHexagonDesc.a  lib/libLLVMHexagonInfo.a  lib/libLLVMLanaiDesc.a  lib/libLLVMLanaiInfo.a  lib/libLLVMLoongArchDesc.a  lib/libLLVMLoongArchInfo.a  lib/libLLVMRISCVDesc.a  lib/libLLVMRISCVInfo.a  lib/libLLVMSystemZDesc.a  lib/libLLVMSystemZInfo.a  lib/libLLVMWebAssemblyDesc.a  lib/libLLVMWebAssemblyInfo.a  lib/libLLVMX86AsmParser.a  lib/libLLVMX86CodeGen.a  lib/libLLVMX86Desc.a  lib/libLLVMX86Disassembler.a  lib/libLLVMX86Info.a  lib/libLLVMAArch64AsmParser.a  lib/libLLVMAArch64CodeGen.a  lib/libLLVMAArch64Disassembler.a  lib/libLLVMAArch64Desc.a  lib/libLLVMAArch64Info.a  lib/libLLVMAArch64Utils.a  lib/libLLVMPowerPCAsmParser.a  lib/libLLVMPowerPCCodeGen.a  lib/libLLVMPowerPCDesc.a  lib/libLLVMPowerPCDisassembler.a  lib/libLLVMPowerPCInfo.a  lib/libLLVMMipsAsmParser.a  lib/libLLVMMipsCodeGen.a  lib/libLLVMAsmPrinter.a  lib/libLLVMMipsDesc.a  lib/libLLVMMipsDisassembler.a  lib/libLLVMMipsInfo.a  lib/libLLVMExegesis.a  lib/libLLVMGlobalISel.a  lib/libLLVMSelectionDAG.a  lib/libLLVMMCDisassembler.a  lib/libLLVMMCA.a  lib/libLLVMObjectYAML.a  lib/libLLVMOrcJIT.a  lib/libLLVMPasses.a  lib/libLLVMCFGuard.a  lib/libLLVMCodeGen.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMHipStdPar.a  lib/libLLVMIRPrinter.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMCoroutines.a  lib/libLLVMipo.a  lib/libLLVMVectorize.a  lib/libLLVMInstrumentation.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMLinker.a  lib/libLLVMTransformUtils.a  lib/libLLVMExecutionEngine.a  lib/libLLVMTarget.a  lib/libLLVMBitWriter.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMJITLink.a  lib/libLLVMOrcTargetProcess.a  lib/libLLVMOrcShared.a  lib/libLLVMWindowsDriver.a  lib/libLLVMOption.a  lib/libLLVMRuntimeDyld.a  lib/libLLVMObject.a  lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMIRReader.a  lib/libLLVMBitReader.a  lib/libLLVMAsmParser.a  lib/libLLVMTextAPI.a  lib/libLLVMCore.a  lib/libLLVMBinaryFormat.a  lib/libLLVMTargetParser.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMSupport.a  -lrt  -ldl  -lm  /usr/lib/libz.so  /usr/lib/libzstd.so  /usr/lib/libcurses.so  lib/libLLVMDemangle.a && :
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Running pass 'PPC Merge String Pool' on module 'lib/libLLVMX86CodeGen.a(X86TargetMachine.cpp.o at 20688330)'.
clang++: error: unable to execute command: Segmentation fault (core dumped)

cc @nikic

[nikic]

I see what the problem is. I'll see if it's possible to construct a test case.

[nikic]

Candidate fix at #92996. I'm reasonably sure that this is the problem, but I didn't manage to come up with a test case. If you could dump the bitcode so I can reduce it that would be great.

[nikic]

@tstellar This issue may warrant another point release.

[nekopsykose]

what would you like the bitcode of? X86TargetMachine.cpp.o? what command should i use (llvm-dis)? i could also upload the whole object somewhere