[clang] UNREACHABLE executed at /root/llvm-project/llvm/include/llvm/Support/Error.h

[wxie7]

code:

int y[1];
void f() {
  int x[] = {0};
  __asm volatile("" : : "# Magic instruction"(x), "m"(y));
}

start with clang-14.0.0
https://godbolt.org/z/3f98oxW6a
generated by fuzzing
Maybe it's related to #50219 and #58389?

Backtrace

Failure value returned from cantFail wrapped call
number of input constraints does not match number of parameters
UNREACHABLE executed at /root/llvm-project/llvm/include/llvm/Support/Error.h:766!
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: /opt/compiler-explorer/clang-assertions-trunk/bin/clang -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -x c -std=c2x -c <source>
1.	<eof> parser at end of file
2.	<source>:2:6: LLVM IR generation of declaration 'f'
3.	<source>:2:6: Generating code for declaration 'f'
 #0 0x0000000003c71738 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3c71738)
 #1 0x0000000003c6f444 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3c6f444)
 #2 0x0000000003bbc988 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x0000723566c42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x0000723566c969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x0000723566c42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x0000723566c287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x0000000003bc82ea (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3bc82ea)
 #8 0x0000000003577580 llvm::InlineAsm::InlineAsm(llvm::FunctionType*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&, bool, bool, llvm::InlineAsm::AsmDialect, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3577580)
 #9 0x00000000035778e4 llvm::ConstantUniqueMap<llvm::InlineAsm>::getOrCreate(llvm::PointerType*, llvm::InlineAsmKeyType) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x35778e4)
#10 0x0000000003578699 llvm::InlineAsm::get(llvm::FunctionType*, llvm::StringRef, llvm::StringRef, bool, bool, llvm::InlineAsm::AsmDialect, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3578699)
#11 0x0000000003fdae52 clang::CodeGen::CodeGenFunction::EmitAsmStmt(clang::AsmStmt const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3fdae52)
#12 0x0000000003fddacf clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3fddacf)
#13 0x0000000003fe557c clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3fe557c)
#14 0x000000000404eaec clang::CodeGen::CodeGenFunction::EmitFunctionBody(clang::Stmt const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x404eaec)
#15 0x0000000004061d3e clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4061d3e)
#16 0x00000000040ca51a clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x40ca51a)
#17 0x00000000040c57a5 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x40c57a5)
#18 0x00000000040c5b8b clang::CodeGen::CodeGenModule::EmitGlobal(clang::GlobalDecl) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x40c5b8b)
#19 0x00000000040d02f3 clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) (.part.0) CodeGenModule.cpp:0:0
#20 0x0000000004604916 (anonymous namespace)::CodeGeneratorImpl::HandleTopLevelDecl(clang::DeclGroupRef) ModuleBuilder.cpp:0:0
#21 0x00000000045f5488 clang::BackendConsumer::HandleTopLevelDecl(clang::DeclGroupRef) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x45f5488)
#22 0x000000000660f794 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x660f794)
#23 0x0000000004602478 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4602478)
#24 0x00000000048be799 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x48be799)
#25 0x0000000004840e2e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4840e2e)
#26 0x00000000049abb8e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x49abb8e)
#27 0x0000000000ce93ef cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xce93ef)
#28 0x0000000000ce0e8a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#29 0x0000000004647ae9 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
#30 0x0000000003bbce34 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3bbce34)
#31 0x00000000046480df 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
#32 0x000000000460c1ed clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x460c1ed)
#33 0x000000000460d26e 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+0x460d26e)
#34 0x0000000004614d95 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4614d95)
#35 0x0000000000ce6233 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xce6233)
#36 0x0000000000bb2524 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xbb2524)
#37 0x0000723566c29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#38 0x0000723566c29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#39 0x0000000000ce0935 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xce0935)
clang: error: clang frontend

[EugeneZelenko]

@wxie7: If you plan to create more issues in future, will be good idea to request triage access, so you'll be able to add proper label(s) and type at the time of issue creation. Request example: #120048.

Please also create more meaningful titles.

[wxie7]

@EugeneZelenko Does that mean I need to open a separate issue to request triage access, or should I do it through AT bot?