[llvm] [SLP]Initial support for ordered reductions (PR #182644)

Sat Feb 21 15:28:14 PST 2026

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 136623 tests passed
* 2568 tests skipped

All executed tests passed, but another part of the build **failed**. Click on a failure below to see the details.

<details>
<summary>libcxxabi/src/CMakeFiles/cxxabi_shared_objects.dir/cxa_demangle.cpp.o</summary>

```
FAILED: libcxxabi/src/CMakeFiles/cxxabi_shared_objects.dir/cxa_demangle.cpp.o
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -DHAVE___CXA_THREAD_ATEXIT_IMPL -DLIBCXX_BUILDING_LIBCXXABI -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_LIBCPP_AVAILABILITY_MINIMUM_HEADER_VERSION=2 -D_LIBCPP_BUILDING_LIBRARY -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCXXABI_BUILDING_LIBRARY -D_LIBCXXABI_LINK_PTHREAD_LIB -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libunwind/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/../libcxx/src -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/x86_64-unknown-linux-gnu/c++/v1 -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1 -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp  -O3 -DNDEBUG -std=c++23 -fPIC -nostdinc++ -fstrict-aliasing -funwind-tables -D_DEBUG -UNDEBUG -UNDEBUG -Wall -Wextra -Wnewline-eof -Wshadow -Wwrite-strings -Wno-unused-parameter -Wno-long-long -Werror=return-type -Wextra-semi -Wundef -Wunused-template -Wformat-nonliteral -Wzero-length-array -Wdeprecated-redundant-constexpr-static-def -Wno-nullability-completeness -Wmissing-prototypes -Wno-user-defined-literals -Wno-covered-switch-default -Wno-suggest-override -Wno-error -fsized-deallocation -fdebug-prefix-map=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1=/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxx/include -MD -MT libcxxabi/src/CMakeFiles/cxxabi_shared_objects.dir/cxa_demangle.cpp.o -MF libcxxabi/src/CMakeFiles/cxxabi_shared_objects.dir/cxa_demangle.cpp.o.d -o libcxxabi/src/CMakeFiles/cxxabi_shared_objects.dir/cxa_demangle.cpp.o -c /home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/src/cxa_demangle.cpp
clang++: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:21986: auto llvm::slpvectorizer::BoUpSLP::vectorizeTree(const ExtraValueToDebugLocsMap &, Instruction *, ArrayRef<std::tuple<Value *, unsigned int, bool, bool>>)::(anonymous class)::operator()(Value *) const: Assertion `isa<FixedVectorType>(Scalar->getType()) && isa<InsertElementInst>(Scalar) && "In-tree scalar of vector type is not insertelement?"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -DHAVE___CXA_THREAD_ATEXIT_IMPL -DLIBCXX_BUILDING_LIBCXXABI -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_LIBCPP_AVAILABILITY_MINIMUM_HEADER_VERSION=2 -D_LIBCPP_BUILDING_LIBRARY -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCXXABI_BUILDING_LIBRARY -D_LIBCXXABI_LINK_PTHREAD_LIB -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libunwind/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/../libcxx/src -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/x86_64-unknown-linux-gnu/c++/v1 -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1 -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp -O3 -DNDEBUG -std=c++23 -fPIC -nostdinc++ -fstrict-aliasing -funwind-tables -D_DEBUG -UNDEBUG -UNDEBUG -Wall -Wextra -Wnewline-eof -Wshadow -Wwrite-strings -Wno-unused-parameter -Wno-long-long -Werror=return-type -Wextra-semi -Wundef -Wunused-template -Wformat-nonliteral -Wzero-length-array -Wdeprecated-redundant-constexpr-static-def -Wno-nullability-completeness -Wmissing-prototypes -Wno-user-defined-literals -Wno-covered-switch-default -Wno-suggest-override -Wno-error -fsized-deallocation -fdebug-prefix-map=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1=/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxx/include -MD -MT libcxxabi/src/CMakeFiles/cxxabi_shared_objects.dir/cxa_demangle.cpp.o -MF libcxxabi/src/CMakeFiles/cxxabi_shared_objects.dir/cxa_demangle.cpp.o.d -o libcxxabi/src/CMakeFiles/cxxabi_shared_objects.dir/cxa_demangle.cpp.o -c /home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/src/cxa_demangle.cpp
1.	<eof> parser at end of file
2.	Optimizer
3.	Running pass "function<eager-inv>(drop-unnecessary-assumes,float2int,lower-constant-intrinsics,chr,loop(loop-rotate<header-duplication;no-prepare-for-lto>,loop-deletion),loop-distribute,inject-tli-mappings,loop-vectorize<no-interleave-forced-only;no-vectorize-forced-only;>,drop-unnecessary-assumes,infer-alignment,loop-load-elim,instcombine<max-iterations=1;no-verify-fixpoint>,simplifycfg<bonus-inst-threshold=1;forward-switch-cond;switch-range-to-icmp;switch-to-arithmetic;switch-to-lookup;no-keep-loops;hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,slp-vectorizer,vector-combine,instcombine<max-iterations=1;no-verify-fixpoint>,loop-unroll<O3>,transform-warning,sroa<preserve-cfg>,infer-alignment,instcombine<max-iterations=1;no-verify-fixpoint>,loop-mssa(licm<allowspeculation>),alignment-from-assumptions,loop-sink,instsimplify,div-rem-pairs,tailcallelim,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;speculate-unpredictables>)" on module "/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/src/cxa_demangle.cpp"
4.	Running pass "slp-vectorizer" on function "_ZNK12_GLOBAL__N_116itanium_demangle16FloatLiteralImplIdE9printLeftERNS0_12OutputBufferE"
#0 0x0000000009174748 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Unix/Signals.inc:880:13
#1 0x00000000091716b5 llvm::sys::RunSignalHandlers() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Signals.cpp:109:18
#2 0x00000000090d30d6 HandleCrash /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
#3 0x00000000090d30d6 CrashRecoverySignalHandler(int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:393:51
#4 0x00007c2f8a0c1330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#5 0x00007c2f8a11ab2c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x9eb2c)
#6 0x00007c2f8a0c127e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4527e)
#7 0x00007c2f8a0a48ff abort (/lib/x86_64-linux-gnu/libc.so.6+0x288ff)
#8 0x00007c2f8a0a481b (/lib/x86_64-linux-gnu/libc.so.6+0x2881b)
#9 0x00007c2f8a0b7517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
#10 0x000000000a956e40 operator* /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/DenseMap.h:1212:5
#11 0x000000000a956e40 operator-> /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/DenseMap.h:1215:54
#12 0x000000000a956e40 llvm::slpvectorizer::BoUpSLP::vectorizeTree(llvm::SmallDenseSet<llvm::Value*, 4u, llvm::DenseMapInfo<llvm::Value*, void>> const&, llvm::Instruction*, llvm::ArrayRef<std::tuple<llvm::Value*, unsigned int, bool, bool>>)::$_2::operator()(llvm::Value*) const /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:0:0
#13 0x000000000a950629 llvm::slpvectorizer::BoUpSLP::vectorizeTree(llvm::SmallDenseSet<llvm::Value*, 4u, llvm::DenseMapInfo<llvm::Value*, void>> const&, llvm::Instruction*, llvm::ArrayRef<std::tuple<llvm::Value*, unsigned int, bool, bool>>) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:0:0
#14 0x000000000a9ba4de (anonymous namespace)::HorizontalReduction::tryToReduce(llvm::slpvectorizer::BoUpSLP&, llvm::DataLayout const&, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo const&, llvm::AssumptionCache*, llvm::DominatorTree&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:26401:16
#15 0x000000000a96dcde operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:27510:19
#16 0x000000000a96dcde llvm::SLPVectorizerPass::vectorizeHorReduction(llvm::PHINode*, llvm::Instruction*, llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&, llvm::SmallVectorImpl<llvm::WeakTrackingVH>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:27535:30
#17 0x000000000a9d02b9 vectorizeRootInstruction /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:0:14
#18 0x000000000a9d02b9 bool llvm::SLPVectorizerPass::vectorizeCmpInsts<std::reverse_iterator<llvm::CmpInst* const*>>(llvm::iterator_range<std::reverse_iterator<llvm::CmpInst* const*>>, llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:27940:20
#19 0x000000000a9712a4 llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&)::$_4::operator()(bool) const /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:28268:7
#20 0x000000000a9660b4 llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:28379:11
#21 0x000000000a962a53 llvm::SLPVectorizerPass::runImpl(llvm::Function&, llvm::ScalarEvolution*, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo*, llvm::AAResults*, llvm::LoopInfo*, llvm::DominatorTree*, llvm::AssumptionCache*, llvm::DemandedBits*, llvm::OptimizationRemarkEmitter*) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:24518:16
#22 0x000000000a961e8c llvm::SLPVectorizerPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:24446:18
#23 0x000000000a61101d llvm::detail::PassModel<llvm::Function, llvm::SLPVectorizerPass, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:91:5
#24 0x0000000008b2f7e7 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:80:8
#25 0x0000000006781ffd llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:91:5
#26 0x0000000008b33941 llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/IR/PassManager.cpp:132:23
#27 0x000000000678380d llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:91:5
#28 0x0000000008b2e8b7 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:80:8
#29 0x0000000009a922b4 ~SmallPtrSetImplBase /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/SmallPtrSet.h:89:9
#30 0x0000000009a922b4 ~PreservedAnalyses /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/Analysis.h:112:7
#31 0x0000000009a922b4 (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>&, std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1208:5
#32 0x0000000009a89547 RunCodegenPipeline /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1217:7
#33 0x0000000009a89547 emitAssembly /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1300:3
#34 0x0000000009a89547 clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1472:13
#35 0x0000000009a9e63a ~unique_ptr /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/unique_ptr.h:403:6
#36 0x0000000009a9e63a clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:312:3
#37 0x000000000b6eccf9 __normal_iterator /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/stl_iterator.h:1077:20
#38 0x000000000b6eccf9 begin /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/stl_vector.h:874:16
#39 0x000000000b6eccf9 finalize<std::vector<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback> >, std::allocator<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback> > > > > /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/include/clang/Sema/TemplateInstCallback.h:54:16
#40 0x000000000b6eccf9 clang::ParseAST(clang::Sema&, bool, bool) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Parse/ParseAST.cpp:190:3
#41 0x0000000009fdef56 clang::FrontendAction::Execute() /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1326:10
#42 0x0000000009f43b8d getPtr /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:278:42
#43 0x0000000009f43b8d operator bool /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:241:16
#44 0x0000000009f43b8d clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1007:23
#45 0x000000000a0d369c clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:310:25
#46 0x000000000634e589 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/cc1_main.cpp:304:15
#47 0x000000000634a355 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/driver.cpp:229:12
#48 0x000000000634c92d operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/driver.cpp:0:12
#49 0x000000000634c92d int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::$_0>(long, llvm::SmallVectorImpl<char const*>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:46:12
#50 0x0000000009dadf29 operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Job.cpp:442:30
#51 0x0000000009dadf29 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::$_0>(long) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:46:12
#52 0x00000000090d2dee operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:0:12
#53 0x00000000090d2dee llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:437:3
#54 0x0000000009dad5f3 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Job.cpp:442:7
#55 0x0000000009d6bb5c clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Compilation.cpp:196:15
#56 0x0000000009d6bd77 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Compilation.cpp:246:13
#57 0x0000000009d88698 empty /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/SmallVector.h:83:46
#58 0x0000000009d88698 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Driver.cpp:2283:23
#59 0x0000000006349b4f clang_main(int, char**, llvm::ToolContext const&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/driver.cpp:418:21
#60 0x000000000635a77d main /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/tools/driver/clang-driver.cpp:17:10
#61 0x00007c2f8a0a61ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
#62 0x00007c2f8a0a628b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
#63 0x0000000006347d25 _start (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang+++0x6347d25)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 23.0.0git (https://github.com/llvm/llvm-project 3f1a756ace3e2279e20f7c0d58c387e30e0c5c32)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin
Build config: +assertions
clang++: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++: note: diagnostic msg: /home/gha/actions-runner/_work/llvm-project/llvm-project/artifacts/reproducers/cxa_demangle-52aebc.cpp
clang++: note: diagnostic msg: /home/gha/actions-runner/_work/llvm-project/llvm-project/artifacts/reproducers/cxa_demangle-52aebc.sh
clang++: note: diagnostic msg:

********************
Aborted
```
</details>
<details>
<summary>libcxxabi/src/CMakeFiles/cxxabi_static_objects.dir/cxa_demangle.cpp.o</summary>

```
FAILED: libcxxabi/src/CMakeFiles/cxxabi_static_objects.dir/cxa_demangle.cpp.o
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -DHAVE___CXA_THREAD_ATEXIT_IMPL -DLIBCXX_BUILDING_LIBCXXABI -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_LIBCPP_AVAILABILITY_MINIMUM_HEADER_VERSION=2 -D_LIBCPP_BUILDING_LIBRARY -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCXXABI_BUILDING_LIBRARY -D_LIBCXXABI_LINK_PTHREAD_LIB -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libunwind/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/../libcxx/src -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/x86_64-unknown-linux-gnu/c++/v1 -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1 -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp  -O3 -DNDEBUG -std=c++23 -nostdinc++ -fstrict-aliasing -funwind-tables -D_DEBUG -UNDEBUG -UNDEBUG -Wall -Wextra -Wnewline-eof -Wshadow -Wwrite-strings -Wno-unused-parameter -Wno-long-long -Werror=return-type -Wextra-semi -Wundef -Wunused-template -Wformat-nonliteral -Wzero-length-array -Wdeprecated-redundant-constexpr-static-def -Wno-nullability-completeness -Wmissing-prototypes -Wno-user-defined-literals -Wno-covered-switch-default -Wno-suggest-override -Wno-error -fsized-deallocation -fdebug-prefix-map=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1=/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxx/include -MD -MT libcxxabi/src/CMakeFiles/cxxabi_static_objects.dir/cxa_demangle.cpp.o -MF libcxxabi/src/CMakeFiles/cxxabi_static_objects.dir/cxa_demangle.cpp.o.d -o libcxxabi/src/CMakeFiles/cxxabi_static_objects.dir/cxa_demangle.cpp.o -c /home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/src/cxa_demangle.cpp
clang++: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:21986: auto llvm::slpvectorizer::BoUpSLP::vectorizeTree(const ExtraValueToDebugLocsMap &, Instruction *, ArrayRef<std::tuple<Value *, unsigned int, bool, bool>>)::(anonymous class)::operator()(Value *) const: Assertion `isa<FixedVectorType>(Scalar->getType()) && isa<InsertElementInst>(Scalar) && "In-tree scalar of vector type is not insertelement?"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -DHAVE___CXA_THREAD_ATEXIT_IMPL -DLIBCXX_BUILDING_LIBCXXABI -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_LIBCPP_AVAILABILITY_MINIMUM_HEADER_VERSION=2 -D_LIBCPP_BUILDING_LIBRARY -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCXXABI_BUILDING_LIBRARY -D_LIBCXXABI_LINK_PTHREAD_LIB -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libunwind/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/../libcxx/src -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/x86_64-unknown-linux-gnu/c++/v1 -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1 -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp -O3 -DNDEBUG -std=c++23 -nostdinc++ -fstrict-aliasing -funwind-tables -D_DEBUG -UNDEBUG -UNDEBUG -Wall -Wextra -Wnewline-eof -Wshadow -Wwrite-strings -Wno-unused-parameter -Wno-long-long -Werror=return-type -Wextra-semi -Wundef -Wunused-template -Wformat-nonliteral -Wzero-length-array -Wdeprecated-redundant-constexpr-static-def -Wno-nullability-completeness -Wmissing-prototypes -Wno-user-defined-literals -Wno-covered-switch-default -Wno-suggest-override -Wno-error -fsized-deallocation -fdebug-prefix-map=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1=/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxx/include -MD -MT libcxxabi/src/CMakeFiles/cxxabi_static_objects.dir/cxa_demangle.cpp.o -MF libcxxabi/src/CMakeFiles/cxxabi_static_objects.dir/cxa_demangle.cpp.o.d -o libcxxabi/src/CMakeFiles/cxxabi_static_objects.dir/cxa_demangle.cpp.o -c /home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/src/cxa_demangle.cpp
1.	<eof> parser at end of file
2.	Optimizer
3.	Running pass "function<eager-inv>(drop-unnecessary-assumes,float2int,lower-constant-intrinsics,chr,loop(loop-rotate<header-duplication;no-prepare-for-lto>,loop-deletion),loop-distribute,inject-tli-mappings,loop-vectorize<no-interleave-forced-only;no-vectorize-forced-only;>,drop-unnecessary-assumes,infer-alignment,loop-load-elim,instcombine<max-iterations=1;no-verify-fixpoint>,simplifycfg<bonus-inst-threshold=1;forward-switch-cond;switch-range-to-icmp;switch-to-arithmetic;switch-to-lookup;no-keep-loops;hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,slp-vectorizer,vector-combine,instcombine<max-iterations=1;no-verify-fixpoint>,loop-unroll<O3>,transform-warning,sroa<preserve-cfg>,infer-alignment,instcombine<max-iterations=1;no-verify-fixpoint>,loop-mssa(licm<allowspeculation>),alignment-from-assumptions,loop-sink,instsimplify,div-rem-pairs,tailcallelim,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;speculate-unpredictables>)" on module "/home/gha/actions-runner/_work/llvm-project/llvm-project/libcxxabi/src/cxa_demangle.cpp"
4.	Running pass "slp-vectorizer" on function "_ZNK12_GLOBAL__N_116itanium_demangle16FloatLiteralImplIdE9printLeftERNS0_12OutputBufferE"
#0 0x0000000009174748 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Unix/Signals.inc:880:13
#1 0x00000000091716b5 llvm::sys::RunSignalHandlers() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Signals.cpp:109:18
#2 0x00000000090d30d6 HandleCrash /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
#3 0x00000000090d30d6 CrashRecoverySignalHandler(int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:393:51
#4 0x00007fa476ad6330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#5 0x00007fa476b2fb2c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x9eb2c)
#6 0x00007fa476ad627e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4527e)
#7 0x00007fa476ab98ff abort (/lib/x86_64-linux-gnu/libc.so.6+0x288ff)
#8 0x00007fa476ab981b (/lib/x86_64-linux-gnu/libc.so.6+0x2881b)
#9 0x00007fa476acc517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
#10 0x000000000a956e40 operator* /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/DenseMap.h:1212:5
#11 0x000000000a956e40 operator-> /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/DenseMap.h:1215:54
#12 0x000000000a956e40 llvm::slpvectorizer::BoUpSLP::vectorizeTree(llvm::SmallDenseSet<llvm::Value*, 4u, llvm::DenseMapInfo<llvm::Value*, void>> const&, llvm::Instruction*, llvm::ArrayRef<std::tuple<llvm::Value*, unsigned int, bool, bool>>)::$_2::operator()(llvm::Value*) const /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:0:0
#13 0x000000000a950629 llvm::slpvectorizer::BoUpSLP::vectorizeTree(llvm::SmallDenseSet<llvm::Value*, 4u, llvm::DenseMapInfo<llvm::Value*, void>> const&, llvm::Instruction*, llvm::ArrayRef<std::tuple<llvm::Value*, unsigned int, bool, bool>>) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:0:0
#14 0x000000000a9ba4de (anonymous namespace)::HorizontalReduction::tryToReduce(llvm::slpvectorizer::BoUpSLP&, llvm::DataLayout const&, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo const&, llvm::AssumptionCache*, llvm::DominatorTree&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:26401:16
#15 0x000000000a96dcde operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:27510:19
#16 0x000000000a96dcde llvm::SLPVectorizerPass::vectorizeHorReduction(llvm::PHINode*, llvm::Instruction*, llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&, llvm::SmallVectorImpl<llvm::WeakTrackingVH>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:27535:30
#17 0x000000000a9d02b9 vectorizeRootInstruction /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:0:14
#18 0x000000000a9d02b9 bool llvm::SLPVectorizerPass::vectorizeCmpInsts<std::reverse_iterator<llvm::CmpInst* const*>>(llvm::iterator_range<std::reverse_iterator<llvm::CmpInst* const*>>, llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:27940:20
#19 0x000000000a9712a4 llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&)::$_4::operator()(bool) const /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:28268:7
#20 0x000000000a9660b4 llvm::SLPVectorizerPass::vectorizeChainsInBlock(llvm::BasicBlock*, llvm::slpvectorizer::BoUpSLP&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:28379:11
#21 0x000000000a962a53 llvm::SLPVectorizerPass::runImpl(llvm::Function&, llvm::ScalarEvolution*, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo*, llvm::AAResults*, llvm::LoopInfo*, llvm::DominatorTree*, llvm::AssumptionCache*, llvm::DemandedBits*, llvm::OptimizationRemarkEmitter*) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:24518:16
#22 0x000000000a961e8c llvm::SLPVectorizerPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:24446:18
#23 0x000000000a61101d llvm::detail::PassModel<llvm::Function, llvm::SLPVectorizerPass, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:91:5
#24 0x0000000008b2f7e7 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:80:8
#25 0x0000000006781ffd llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:91:5
#26 0x0000000008b33941 llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/IR/PassManager.cpp:132:23
#27 0x000000000678380d llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerInternal.h:91:5
#28 0x0000000008b2e8b7 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/PassManagerImpl.h:80:8
#29 0x0000000009a922b4 ~SmallPtrSetImplBase /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/SmallPtrSet.h:89:9
#30 0x0000000009a922b4 ~PreservedAnalyses /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/IR/Analysis.h:112:7
#31 0x0000000009a922b4 (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>&, std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1208:5
#32 0x0000000009a89547 RunCodegenPipeline /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1217:7
#33 0x0000000009a89547 emitAssembly /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1300:3
#34 0x0000000009a89547 clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1472:13
#35 0x0000000009a9e63a ~unique_ptr /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/unique_ptr.h:403:6
#36 0x0000000009a9e63a clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:312:3
#37 0x000000000b6eccf9 __normal_iterator /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/stl_iterator.h:1077:20
#38 0x000000000b6eccf9 begin /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/stl_vector.h:874:16
#39 0x000000000b6eccf9 finalize<std::vector<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback> >, std::allocator<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback> > > > > /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/include/clang/Sema/TemplateInstCallback.h:54:16
#40 0x000000000b6eccf9 clang::ParseAST(clang::Sema&, bool, bool) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Parse/ParseAST.cpp:190:3
#41 0x0000000009fdef56 clang::FrontendAction::Execute() /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1326:10
#42 0x0000000009f43b8d getPtr /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:278:42
#43 0x0000000009f43b8d operator bool /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:241:16
#44 0x0000000009f43b8d clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1007:23
#45 0x000000000a0d369c clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:310:25
#46 0x000000000634e589 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/cc1_main.cpp:304:15
#47 0x000000000634a355 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/driver.cpp:229:12
#48 0x000000000634c92d operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/driver.cpp:0:12
#49 0x000000000634c92d int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::$_0>(long, llvm::SmallVectorImpl<char const*>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:46:12
#50 0x0000000009dadf29 operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Job.cpp:442:30
#51 0x0000000009dadf29 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::$_0>(long) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:46:12
#52 0x00000000090d2dee operator() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:0:12
#53 0x00000000090d2dee llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:437:3
#54 0x0000000009dad5f3 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Job.cpp:442:7
#55 0x0000000009d6bb5c clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Compilation.cpp:196:15
#56 0x0000000009d6bd77 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Compilation.cpp:246:13
#57 0x0000000009d88698 empty /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/ADT/SmallVector.h:83:46
#58 0x0000000009d88698 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/lib/Driver/Driver.cpp:2283:23
#59 0x0000000006349b4f clang_main(int, char**, llvm::ToolContext const&) /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/tools/driver/driver.cpp:418:21
#60 0x000000000635a77d main /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/tools/driver/clang-driver.cpp:17:10
#61 0x00007fa476abb1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
#62 0x00007fa476abb28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
#63 0x0000000006347d25 _start (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang+++0x6347d25)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 23.0.0git (https://github.com/llvm/llvm-project 3f1a756ace3e2279e20f7c0d58c387e30e0c5c32)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin
Build config: +assertions
clang++: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++: note: diagnostic msg: /home/gha/actions-runner/_work/llvm-project/llvm-project/artifacts/reproducers/cxa_demangle-332e52.cpp
clang++: note: diagnostic msg: /home/gha/actions-runner/_work/llvm-project/llvm-project/artifacts/reproducers/cxa_demangle-332e52.sh
clang++: note: diagnostic msg:

********************
Aborted
```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/182644