clang crashes on valid code at -O3 on x86_64-linux-gnu: Assertion `Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!"' failed

[zhendongsu]

Compiler Explorer: https://godbolt.org/z/far7hf99E

[511] % clangtk -v
clang version 20.0.0git (https://github.com/llvm/llvm-project.git 00c198b2ca6b6bee2d90e62d78816686ab056b1b)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /local/suz-local/software/local/clang-trunk/bin
Build config: +assertions
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/9
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Candidate multilib: .;@m64
Selected multilib: .;@m64
[512] % 
[512] % clangtk -O2 -c small.c
[513] % clangtk -O3 -c small.c
clangtk: /local/suz-local/software/clangbuild/llvm-project/llvm/include/llvm/IR/DataLayout.h:620: llvm::TypeSize llvm::DataLayout::getTypeSizeInBits(llvm::Type*) const: Assertion `Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!"' 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: clangtk -I/usr/local/include -I/local/suz-local/software/local/include -O3 -c small.c
1.	<eof> parser at end of file
2.	Optimizer
3.	Running pass "function<eager-inv>(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;>,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-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;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 "small.c"
4.	Running pass "slp-vectorizer" on function "main"
 #0 0x0000561bb6b948cf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x42f58cf)
 #1 0x0000561bb6b9241c llvm::sys::CleanupOnSignal(unsigned long) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x42f341c)
 #2 0x0000561bb6ad62e8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007f2777c93420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420)
 #4 0x00007f27776ca00b raise /build/glibc-LcI20x/glibc-2.31/signal/../sysdeps/unix/sysv/linux/raise.c:51:1
 #5 0x00007f27776a9859 abort /build/glibc-LcI20x/glibc-2.31/stdlib/abort.c:81:7
 #6 0x00007f27776a9729 get_sysdep_segment_value /build/glibc-LcI20x/glibc-2.31/intl/loadmsgcat.c:509:8
 #7 0x00007f27776a9729 _nl_load_domain /build/glibc-LcI20x/glibc-2.31/intl/loadmsgcat.c:970:34
 #8 0x00007f27776bafd6 (/lib/x86_64-linux-gnu/libc.so.6+0x33fd6)
 #9 0x0000561bb3ccc4ef llvm::DataLayout::getTypeSizeInBits(llvm::Type*) const (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x142d4ef)
#10 0x0000561bb8500bcd llvm::slpvectorizer::BoUpSLP::computeMinimumValueSizes()::'lambda0'(llvm::slpvectorizer::BoUpSLP::TreeEntry const&, bool, bool, unsigned int, unsigned int, bool, bool)::operator()(llvm::slpvectorizer::BoUpSLP::TreeEntry const&, bool, bool, unsigned int, unsigned int, bool, bool) const::'lambda'(llvm::Value*)::operator()(llvm::Value*) const (.isra.0) SLPVectorizer.cpp:0:0
#11 0x0000561bb8582b90 llvm::slpvectorizer::BoUpSLP::computeMinimumValueSizes()::'lambda0'(llvm::slpvectorizer::BoUpSLP::TreeEntry const&, bool, bool, unsigned int, unsigned int, bool, bool)::operator()(llvm::slpvectorizer::BoUpSLP::TreeEntry const&, bool, bool, unsigned int, unsigned int, bool, bool) const SLPVectorizer.cpp:0:0
#12 0x0000561bb8583144 llvm::slpvectorizer::BoUpSLP::computeMinimumValueSizes() (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x5ce4144)
#13 0x0000561bb85bd4db llvm::SLPVectorizerPass::vectorizeStoreChain(llvm::ArrayRef<llvm::Value*>, llvm::slpvectorizer::BoUpSLP&, unsigned int, unsigned int, unsigned int&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x5d1e4db)
#14 0x0000561bb85beeb3 llvm::SLPVectorizerPass::vectorizeStores(llvm::ArrayRef<llvm::StoreInst*>, llvm::slpvectorizer::BoUpSLP&, llvm::DenseSet<std::tuple<llvm::Value*, llvm::Value*, llvm::Value*, llvm::Value*, unsigned int>, llvm::DenseMapInfo<std::tuple<llvm::Value*, llvm::Value*, llvm::Value*, llvm::Value*, unsigned int>, void>>&)::'lambda'(std::set<std::pair<unsigned int, int>, llvm::SLPVectorizerPass::vectorizeStores(llvm::ArrayRef<llvm::StoreInst*>, llvm::slpvectorizer::BoUpSLP&, llvm::DenseSet<std::tuple<llvm::Value*, llvm::Value*, llvm::Value*, llvm::Value*, unsigned int>, llvm::DenseMapInfo<std::tuple<llvm::Value*, llvm::Value*, llvm::Value*, llvm::Value*, unsigned int>, void>>&)::StoreDistCompare, std::allocator<std::pair<unsigned int, int>>> const&)::operator()(std::set<std::pair<unsigned int, int>, llvm::SLPVectorizerPass::vectorizeStores(llvm::ArrayRef<llvm::StoreInst*>, llvm::slpvectorizer::BoUpSLP&, llvm::DenseSet<std::tuple<llvm::Value*, llvm::Value*, llvm::Value*, llvm::Value*, unsigned int>, llvm::DenseMapInfo<std::tuple<llvm::Value*, llvm::Value*, llvm::Value*, llvm::Value*, unsigned int>, void>>&)::StoreDistCompare, std::allocator<std::pair<unsigned int, int>>> const&) const SLPVectorizer.cpp:0:0
#15 0x0000561bb85c0d18 llvm::SLPVectorizerPass::vectorizeStores(llvm::ArrayRef<llvm::StoreInst*>, llvm::slpvectorizer::BoUpSLP&, llvm::DenseSet<std::tuple<llvm::Value*, llvm::Value*, llvm::Value*, llvm::Value*, unsigned int>, llvm::DenseMapInfo<std::tuple<llvm::Value*, llvm::Value*, llvm::Value*, llvm::Value*, unsigned int>, void>>&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x5d21d18)
#16 0x0000561bb85c1597 llvm::SLPVectorizerPass::vectorizeStoreChains(llvm::slpvectorizer::BoUpSLP&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x5d22597)
#17 0x0000561bb85c2a87 llvm::SLPVectorizerPass::runImpl(llvm::Function&, llvm::ScalarEvolution*, llvm::TargetTransformInfo*, llvm::TargetLibraryInfo*, llvm::AAResults*, llvm::LoopInfo*, llvm::DominatorTree*, llvm::AssumptionCache*, llvm::DemandedBits*, llvm::OptimizationRemarkEmitter*) (.part.0) SLPVectorizer.cpp:0:0
#18 0x0000561bb85c3763 llvm::SLPVectorizerPass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x5d24763)
#19 0x0000561bb8077286 llvm::detail::PassModel<llvm::Function, llvm::SLPVectorizerPass, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x57d8286)
#20 0x0000561bb652dac1 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x3c8eac1)
#21 0x0000561bb4086006 llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x17e7006)
#22 0x0000561bb652c40d llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x3c8d40d)
#23 0x0000561bb4084dc6 llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x17e5dc6)
#24 0x0000561bb652a511 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x3c8b511)
#25 0x0000561bb6e4b2f1 (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
#26 0x0000561bb6e4e4b0 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, 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*) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x45af4b0)
#27 0x0000561bb751d4bc clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x4c7e4bc)
#28 0x0000561bb9372d8c clang::ParseAST(clang::Sema&, bool, bool) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x6ad3d8c)
#29 0x0000561bb751d8d8 clang::CodeGenAction::ExecuteAction() (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x4c7e8d8)
#30 0x0000561bb77bb449 clang::FrontendAction::Execute() (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x4f1c449)
#31 0x0000561bb773c89e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x4e9d89e)
#32 0x0000561bb78a8406 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x5009406)
#33 0x0000561bb3c56ca5 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x13b7ca5)
#34 0x0000561bb3c4fd4a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#35 0x0000561bb756296d 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
#36 0x0000561bb6ad67f0 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x42377f0)
#37 0x0000561bb7562f8f 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
#38 0x0000561bb75277fc clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x4c887fc)
#39 0x0000561bb752828d clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x4c8928d)
#40 0x0000561bb75305b5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x4c915b5)
#41 0x0000561bb3c53fab clang_main(int, char**, llvm::ToolContext const&) (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x13b4fab)
#42 0x0000561bb3b442fb main (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x12a52fb)
#43 0x00007f27776ab083 __libc_start_main /build/glibc-LcI20x/glibc-2.31/csu/../csu/libc-start.c:342:3
#44 0x0000561bb3c4f7de _start (/local/suz-local/software/local/clang-trunk/bin/clang-20+0x13b07de)
clangtk: error: clang frontend command failed with exit code 134 (use -v to see invocation)
clang version 20.0.0git (https://github.com/llvm/llvm-project.git 00c198b2ca6b6bee2d90e62d78816686ab056b1b)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /local/suz-local/software/local/clang-trunk/bin
Build config: +assertions
clangtk: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clangtk: note: diagnostic msg: /tmp/small-cadadf.c
clangtk: note: diagnostic msg: /tmp/small-cadadf.sh
clangtk: note: diagnostic msg: 

********************
[514] % 
[514] % cat small.c
char a, m, n;
long c, h, i, k;
int d, j, l, o, q, r, s;
volatile int e;
volatile char f;
volatile short g, p, t;
extern void aa();
int main() {
  while (a) {
    short v, x = d;
    int w[4];
    for (; s;)
      aa();
    int y = x % 6, u = t % (x ^ 1UL) % p, ab = f / ~0;
    char b = t ^ 6, ac = m | j & 3 | 1 | g ^ d;
    long z = u % x % 6 * t;
    p = z | y | 4073709551615 * y >> b | -9 & d ^ 1 / g;
    unsigned ad = o ^ g * f;
    m = ~~g % ~(~0 / i);
    r = ~~(c | ad % ~3 * ~ac) * r / f % 3 ^ g;
    for (; s; s++)
      ;
    for (; s; s++)
      while (m)
        for (; d;)
          w[s] = 3;
    v = 5;
    for (; v >= 0; v -= 1) {
      c = 0;
      for (; c <= 3; c++) {
        j = q;
        while (q) {
          if (r)
            e;
          if (l)
            break;
        }
        n = w[c] + a;
        w[c] = (h < n) << 10 <= k;
      }
    }
  }
  return 0;
}

[dtcxzyw]

Duplicate of #107036.

[alexey-bataev]

Fixed in f381cd0