[clang][bytecode] Assertion `!DiscardResult && "Should've been checked before"' failed. #164979
Description
Reproducer:
https://godbolt.org/z/Mqhv7focY
void foo(void) {
L:
*&&L;
}Backtrace:
clang++: /root/llvm-project/llvm/tools/clang/lib/AST/ByteCode/Compiler.cpp:7373: bool clang::interp::Compiler<Emitter>::emitDummyPtr(const DeclTy&, const clang::Expr*) [with Emitter = clang::interp::EvalEmitter; clang::interp::DeclTy = llvm::PointerUnion<const clang::Decl*, const clang::Expr*>]: Assertion `!DiscardResult && "Should've been checked before"' 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: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -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 -fexperimental-new-constant-interpreter <source>
1. <source>:4:1: current parser token '}'
2. <source>:1:16: parsing function body 'foo'
3. <source>:1:16: in compound statement ('{}')
#0 0x0000000004214d18 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4214d18)
#1 0x0000000004212144 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4212144)
#2 0x0000000004156348 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x000073dd91642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x000073dd916969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x000073dd91642476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x000073dd916287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x000073dd9162871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x000073dd91639e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x00000000080ab847 clang::interp::Compiler<clang::interp::EvalEmitter>::emitDummyPtr(llvm::PointerUnion<clang::Decl const*, clang::Expr const*> const&, clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x80ab847)
#10 0x00000000080ab945 clang::interp::Compiler<clang::interp::EvalEmitter>::VisitAddrLabelExpr(clang::AddrLabelExpr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x80ab945)
#11 0x00000000080c95bb clang::interp::Compiler<clang::interp::EvalEmitter>::discard(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x80c95bb)
#12 0x00000000080d4ec6 clang::interp::Compiler<clang::interp::EvalEmitter>::VisitUnaryOperator(clang::UnaryOperator const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x80d4ec6)
#13 0x00000000080c95bb clang::interp::Compiler<clang::interp::EvalEmitter>::discard(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x80c95bb)
#14 0x00000000080d0558 clang::interp::Compiler<clang::interp::EvalEmitter>::visit(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x80d0558)
#15 0x00000000080c508c clang::interp::Compiler<clang::interp::EvalEmitter>::visitExpr(clang::Expr const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x80c508c)
#16 0x0000000007c657bd clang::interp::EvalEmitter::interpretExpr(clang::Expr const*, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7c657bd)
#17 0x0000000007c54c33 clang::interp::Context::evaluateAsRValue(clang::interp::State&, clang::Expr const*, clang::APValue&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7c54c33)
#18 0x0000000007bc2ae3 EvaluateAsRValue((anonymous namespace)::EvalInfo&, clang::Expr const*, clang::APValue&) ExprConstant.cpp:0:0
#19 0x0000000007bc660e clang::Expr::EvaluateForOverflow(clang::ASTContext const&) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7bc660e)
#20 0x0000000006b54596 clang::Sema::CheckForIntOverflow(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6b54596)
#21 0x0000000006b96e5c clang::Sema::CheckCompletedExpr(clang::Expr*, clang::SourceLocation, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6b96e5c)
#22 0x0000000006f396e7 clang::Sema::ActOnFinishFullExpr(clang::Expr*, clang::SourceLocation, bool, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6f396e7)
#23 0x000000000724f57e clang::Sema::ActOnExprStmt(clang::ActionResult<clang::Expr*, true>, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x724f57e)
#24 0x0000000006a1ba74 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a1ba74)
#25 0x0000000006a13002 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::LabelDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a13002)
#26 0x0000000006a139c9 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::LabelDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a139c9)
#27 0x0000000006a14a5b clang::Parser::ParseStatement(clang::SourceLocation*, clang::Parser::ParsedStmtContext, clang::LabelDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a14a5b)
#28 0x0000000006a1cb2c clang::Parser::ParseLabeledStatement(clang::ParsedAttributes&, clang::Parser::ParsedStmtContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a1cb2c)
#29 0x0000000006a12ff2 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::LabelDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a12ff2)
#30 0x0000000006a139c9 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::LabelDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a139c9)
#31 0x0000000006a1c156 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a1c156)
#32 0x0000000006a1c96a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a1c96a)
#33 0x000000000692343b clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x692343b)
#34 0x00000000069598ad clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x69598ad)
#35 0x0000000006916bee clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6916bee)
#36 0x000000000691738f clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x691738f)
#37 0x000000000691ec43 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x691ec43)
#38 0x000000000691fb55 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x691fb55)
#39 0x0000000006920000 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6920000)
#40 0x00000000069011a3 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x69011a3)
#41 0x0000000004b5d4e8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b5d4e8)
#42 0x0000000004e4a685 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4e4a685)
#43 0x0000000004dcb73e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4dcb73e)
#44 0x0000000004f41c2d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4f41c2d)
#45 0x0000000000dce380 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdce380)
#46 0x0000000000dc4eea ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#47 0x0000000000dc506d 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
#48 0x0000000004bc6a79 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
#49 0x00000000041567e4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41567e4)
#50 0x0000000004bc708f 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
#51 0x0000000004b87fd2 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b87fd2)
#52 0x0000000004b88f7e 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+++0x4b88f7e)
#53 0x0000000004b90695 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b90695)
#54 0x0000000000dca8a9 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdca8a9)
#55 0x0000000000c79c64 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc79c64)
#56 0x000073dd91629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#57 0x000073dd91629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#58 0x0000000000dc4985 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdc4985)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134