Clang crashed at -O1 and above with asm goto

[iamanonymouscs]

Compiler explorer: https://godbolt.org/z/P6jejnGn6

Testcase:

$cat small.c

int *a;
int *b;
void c() {
  __asm__ goto("" : "=r"(b) : : : d);
d:
  while (a != b)
    a++;
}

Assertion:

clang++: /root/llvm-project/llvm/include/llvm/ADT/ilist_iterator.h:322:
llvm::ilist_iterator_w_bits<OptionsT, IsReverse, IsConst>::reference llvm::ilist_iterator_w_bits<OptionsT, IsReverse, IsConst>::operator*() const [with OptionsT = llvm::ilist_detail::node_options<llvm::Instruction, true, false, void, true, llvm::BasicBlock>; bool IsReverse = false; bool IsConst = false; llvm::ilist_iterator_w_bits<OptionsT, IsReverse, IsConst>::reference = llvm::Instruction&]:
Assertion `!NodePtr->isKnownSentinel()' failed.

Backtrace:

#11 0x0000000004630a85 llvm::SCEVExpander::findInsertPointAfter(llvm::Instruction*, llvm::Instruction*) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4630a85)
#12 0x000000000463e8b5 llvm::SCEVExpander::visitPtrToIntExpr(llvm::SCEVUseT<llvm::SCEVPtrToIntExpr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463e8b5)
#13 0x000000000463ca50 llvm::SCEVUseVisitor<llvm::SCEVExpander, llvm::Value*>::visit(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463ca50)
#14 0x000000000463d74d llvm::SCEVExpander::expand(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463d74d)
#15 0x0000000004643bf7 llvm::SCEVExpander::visitAddExpr(llvm::SCEVUseT<llvm::SCEVAddExpr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4643bf7)
#16 0x000000000463c828 llvm::SCEVUseVisitor<llvm::SCEVExpander, llvm::Value*>::visit(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463c828)
#17 0x000000000463d74d llvm::SCEVExpander::expand(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463d74d)
#18 0x0000000004642a54 llvm::SCEVExpander::visitUDivExpr(llvm::SCEVUseT<llvm::SCEVUDivExpr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4642a54)
#19 0x000000000463c898 llvm::SCEVUseVisitor<llvm::SCEVExpander, llvm::Value*>::visit(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463c898)
#20 0x000000000463d74d llvm::SCEVExpander::expand(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463d74d)
#21 0x0000000004642dac llvm::SCEVExpander::visitMulExpr(llvm::SCEVUseT<llvm::SCEVMulExpr const*>)::'lambda'()::operator()() const ScalarEvolutionExpander.cpp:0:0
#22 0x000000000463c38a llvm::SCEVExpander::visitMulExpr(llvm::SCEVUseT<llvm::SCEVMulExpr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463c38a)
#23 0x000000000463c860 llvm::SCEVUseVisitor<llvm::SCEVExpander, llvm::Value*>::visit(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463c860)
#24 0x000000000463d74d llvm::SCEVExpander::expand(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463d74d)
#25 0x0000000004643bf7 llvm::SCEVExpander::visitAddExpr(llvm::SCEVUseT<llvm::SCEVAddExpr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4643bf7)
#26 0x000000000463c828 llvm::SCEVUseVisitor<llvm::SCEVExpander, llvm::Value*>::visit(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463c828)
#27 0x000000000463d74d llvm::SCEVExpander::expand(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463d74d)
#28 0x0000000004642f9c llvm::SCEVExpander::expandAddToGEP(llvm::SCEV const*, llvm::Value*, llvm::SCEVNoWrapFlags) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4642f9c)
#29 0x0000000004643bb3 llvm::SCEVExpander::visitAddExpr(llvm::SCEVUseT<llvm::SCEVAddExpr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4643bb3)
#30 0x000000000463c828 llvm::SCEVUseVisitor<llvm::SCEVExpander, llvm::Value*>::visit(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463c828)
#31 0x000000000463d74d llvm::SCEVExpander::expand(llvm::SCEVUseT<llvm::SCEV const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x463d74d)
#32 0x0000000004644c79 llvm::SCEVExpander::expandCodeFor(llvm::SCEVUseT<llvm::SCEV const*>, llvm::Type*, llvm::ilist_iterator_w_bits<llvm::ilist_detail::node_options<llvm::Instruction, true, false, void, true, llvm::BasicBlock>, false, false>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4644c79)
#33 0x00000000045f3933 llvm::rewriteLoopExitValues(llvm::Loop*, llvm::LoopInfo*, llvm::TargetLibraryInfo*, llvm::ScalarEvolution*, llvm::TargetTransformInfo const*, llvm::SCEVExpander&, llvm::DominatorTree*, llvm::ReplaceExitVal, llvm::SmallVector<llvm::WeakTrackingVH, 16u>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x45f3933)
#34 0x0000000008a70d38 (anonymous namespace)::IndVarSimplify::run(llvm::Loop*) IndVarSimplify.cpp:0:0
#35 0x0000000008a71ad0 llvm::IndVarSimplifyPass::run(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x8a71ad0)
#36 0x0000000005758f5e llvm::detail::PassModel<llvm::Loop, llvm::IndVarSimplifyPass, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::run(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5758f5e)
#37 0x00000000042bba16 std::optional<llvm::PreservedAnalyses> llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::runSinglePass<llvm::Loop, std::unique_ptr<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>, std::default_delete<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>>>>(llvm::Loop&, std::unique_ptr<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>, std::default_delete<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>>>&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&, llvm::PassInstrumentation&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42bba16)
#38 0x00000000042bbbd4 llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::runWithoutLoopNestPasses(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42bbbd4)
#39 0x00000000042bd224 llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::run(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42bd224)
#40 0x00000000042be17d llvm::FunctionToLoopPassAdaptor::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42be17d)
#41 0x00000000012eef8e llvm::detail::PassModel<llvm::Function, llvm::FunctionToLoopPassAdaptor, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x12eef8e)
#42 0x0000000003deeb66 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3deeb66)
#43 0x00000000012efdae llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x12efdae)
#44 0x0000000003270456 llvm::CGSCCToFunctionPassAdaptor::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3270456)
#45 0x00000000012eeb0e llvm::detail::PassModel<llvm::LazyCallGraph::SCC, llvm::CGSCCToFunctionPassAdaptor, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x12eeb0e)
#46 0x0000000003266f5a llvm::PassManager<llvm::LazyCallGraph::SCC, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3266f5a)
#47 0x000000000589e06e llvm::detail::PassModel<llvm::LazyCallGraph::SCC, llvm::PassManager<llvm::LazyCallGraph::SCC, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x589e06e)
#48 0x0000000003267525 llvm::DevirtSCCRepeatedPass::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3267525)
#49 0x000000000589e08e llvm::detail::PassModel<llvm::LazyCallGraph::SCC, llvm::DevirtSCCRepeatedPass, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x589e08e)
#50 0x000000000326c958 llvm::ModuleToPostOrderCGSCCPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x326c958)
#51 0x00000000012eeaee llvm::detail::PassModel<llvm::Module, llvm::ModuleToPostOrderCGSCCPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x12eeaee)
#52 0x0000000003dea5a6 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3dea5a6)
#53 0x0000000005ff0753 llvm::ModuleInlinerWrapperPass::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5ff0753)
#54 0x0000000005758f8e llvm::detail::PassModel<llvm::Module, llvm::ModuleInlinerWrapperPass, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5758f8e)
#55 0x0000000003dea5a6 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3dea5a6)
#56 0x00000000048f0ccb (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*) BackendUtil.cpp:0:0
#57 0x00000000048f42cc 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*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48f42cc)
#58 0x0000000004fbba57 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4fbba57)
#59 0x0000000006db78ac clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6db78ac)
#60 0x0000000004fbbe98 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4fbbe98)
#61 0x00000000052ec7f8 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x52ec7f8)
#62 0x000000000526bc10 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x526bc10)
#63 0x00000000053ea22d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x53ea22d)
#64 0x0000000000e131db cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xe131db)
#65 0x0000000000e09b8a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#66 0x0000000000e09d0d int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::'lambda'(llvm::SmallVectorImpl<char const*>&)>(long, llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#67 0x000000000502cf79 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::'lambda'()>(long) Job.cpp:0:0
#68 0x00000000043ef664 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43ef664)
#69 0x000000000502d5c6 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#70 0x0000000004feb5f2 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4feb5f2)
#71 0x0000000004fec59e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4fec59e)
#72 0x0000000004ff41c5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ff41c5)
#73 0x0000000000e0f5b4 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xe0f5b4)
#74 0x0000000000cb26da main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcb26da)
#75 0x00007ac29ae29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#76 0x00007ac29ae29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#77 0x0000000000e09625 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xe09625)

Command:

$/compiler/llvm-trunk-aarch64/bin/clang --target=aarch64-linux-gnu --gcc-toolchain=/compiler/gcc-trunk-aarch64 --sysroot=/usr/aarch64-linux-gnu -O1 -c small.c
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: /compiler/llvm-trunk-aarch64/bin/clang --target=aarch64-linux-gnu --gcc-toolchain=/compiler/gcc-trunk-aarch64 --sysroot=/usr/aarch64-linux-gnu -O1 -c small.c
1.      <eof> parser at end of file
2.      Optimizer
3.      Running pass "require<globals-aa>,function(invalidate<aa>),require<profile-summary>,cgscc(devirt<4>(inline,function-attrs<skip-non-recursive-function-attrs>,function<eager-inv;no-rerun>(sroa<modify-cfg>,early-cse<memssa>,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,libcalls-shrinkwrap,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,reassociate,loop-mssa(loop-instsimplify,loop-simplifycfg,licm<no-allowspeculation>,loop-rotate<header-duplication;no-prepare-for-lto;no-check-exit-count>,licm<allowspeculation>,simple-loop-unswitch<no-nontrivial;trivial>),simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,loop(loop-idiom,indvars,loop-idiom-vectorize,loop-deletion,loop-unroll-full),sroa<modify-cfg>,memcpyopt,sccp,bdce,instcombine<max-iterations=1;no-verify-fixpoint>,coro-elide,adce,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>),function-attrs,function(require<should-not-run-function-passes>),coro-split,coro-annotation-elide)),function(invalidate<should-not-run-function-passes>),cgscc(devirt<4>())" on module "small.c"
4.      Running pass "cgscc(devirt<4>(inline,function-attrs<skip-non-recursive-function-attrs>,function<eager-inv;no-rerun>(sroa<modify-cfg>,early-cse<memssa>,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,libcalls-shrinkwrap,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,reassociate,loop-mssa(loop-instsimplify,loop-simplifycfg,licm<no-allowspeculation>,loop-rotate<header-duplication;no-prepare-for-lto;no-check-exit-count>,licm<allowspeculation>,simple-loop-unswitch<no-nontrivial;trivial>),simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,loop(loop-idiom,indvars,loop-idiom-vectorize,loop-deletion,loop-unroll-full),sroa<modify-cfg>,memcpyopt,sccp,bdce,instcombine<max-iterations=1;no-verify-fixpoint>,coro-elide,adce,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>),function-attrs,function(require<should-not-run-function-passes>),coro-split,coro-annotation-elide))" on module "small.c"
5.      Running pass "memcpyopt" on function "c"
Segmentation fault (core dumped)

[shafik]

This crashes on regular clang as well: https://godbolt.org/z/axq8ssfx1

Goes back to clang-17: https://godbolt.org/z/rT3ashjcY