| Issue |
176902
|
| Summary |
[clang][bytecode] crashes on ill-formed _Static_assert comparing complex value
|
| Labels |
crash-on-invalid,
clang:bytecode
|
| Assignees |
|
| Reporter |
k-arrows
|
Reproducer:
https://godbolt.org/z/hevfz88M1
```cpp
#define EVAL(a, b) _Static_assert(a == b, "")
void foo() {
EVAL(; + 0, 1i);
}
```
Backtrace:
```console
clang++: /root/llvm-project/llvm/tools/clang/lib/AST/ByteCode/Compiler.cpp:7383: bool clang::interp::Compiler<Emitter>::emitComplexComparison(const clang::Expr*, const clang::Expr*, const clang::BinaryOperator*) [with Emitter = clang::interp::EvalEmitter]: Assertion `!DiscardResult' 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>:5:1: current parser token '}'
2. <source>:3:12: parsing function body 'foo'
3. <source>:3:12: in compound statement ('{}')
#0 0x0000000004312838 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4312838)
#1 0x000000000430fc94 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x430fc94)
#2 0x00000000042528e8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x00007ee985642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007ee9856969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x00007ee985642476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007ee9856287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x00007ee98562871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x00007ee985639e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x000000000828df02 clang::interp::Compiler<clang::interp::EvalEmitter>::emitComplexComparison(clang::Expr const*, clang::Expr const*, clang::BinaryOperator const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x828df02)
#10 0x000000000829f23d clang::interp::Compiler<clang::interp::EvalEmitter>::VisitBinaryOperator(clang::BinaryOperator const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x829f23d)
#11 0x000000000829518b clang::interp::Compiler<clang::interp::EvalEmitter>::discard(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x829518b)
#12 0x000000000829f26b clang::interp::Compiler<clang::interp::EvalEmitter>::VisitBinaryOperator(clang::BinaryOperator const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x829f26b)
#13 0x000000000829c8da clang::interp::Compiler<clang::interp::EvalEmitter>::visit(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x829c8da)
#14 0x0000000008290aa6 clang::interp::Compiler<clang::interp::EvalEmitter>::visitExpr(clang::Expr const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x8290aa6)
#15 0x0000000007e211ad clang::interp::EvalEmitter::interpretExpr(clang::Expr const*, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7e211ad)
#16 0x0000000007e11473 clang::interp::Context::evaluateAsRValue(clang::interp::State&, clang::Expr const*, clang::APValue&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7e11473)
#17 0x0000000007d7e9b3 EvaluateAsRValue((anonymous namespace)::EvalInfo&, clang::Expr const*, clang::APValue&) ExprConstant.cpp:0:0
#18 0x0000000007d82f2e clang::Expr::EvaluateForOverflow(clang::ASTContext const&) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7d82f2e)
#19 0x0000000006cad3a6 clang::Sema::CheckForIntOverflow(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cad3a6)
#20 0x0000000006cf3b4c clang::Sema::CheckCompletedExpr(clang::Expr*, clang::SourceLocation, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cf3b4c)
#21 0x000000000709b9f7 clang::Sema::ActOnFinishFullExpr(clang::Expr*, clang::SourceLocation, bool, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x709b9f7)
#22 0x00000000073bde8e clang::Sema::ActOnExprStmt(clang::ActionResult<clang::Expr*, true>, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x73bde8e)
#23 0x0000000006b77f04 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6b77f04)
#24 0x0000000006b6f314 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+++0x6b6f314)
#25 0x0000000006b6fcf6 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::LabelDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6b6fcf6)
#26 0x0000000006b7863e clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6b7863e)
#27 0x0000000006b78e8a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6b78e8a)
#28 0x0000000006a7f05b clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a7f05b)
#29 0x0000000006ab54cd 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+++0x6ab54cd)
#30 0x0000000006a721bb clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a721bb)
#31 0x0000000006a729af clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a729af)
#32 0x0000000006a7a7da clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a7a7da)
#33 0x0000000006a7b775 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a7b775)
#34 0x0000000006a7bc20 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a7bc20)
#35 0x0000000006a5c7c3 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a5c7c3)
#36 0x0000000004c7ab78 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c7ab78)
#37 0x0000000004f74f85 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4f74f85)
#38 0x0000000004ef495e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ef495e)
#39 0x000000000506fbfd clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x506fbfd)
#40 0x0000000000ddd1ce cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xddd1ce)
#41 0x0000000000dd3b9a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#42 0x0000000000dd3d1d 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
#43 0x0000000004cee0b9 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
#44 0x0000000004252d84 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4252d84)
#45 0x0000000004cee6cf 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
#46 0x0000000004caf0a2 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4caf0a2)
#47 0x0000000004cb004e 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+++0x4cb004e)
#48 0x0000000004cb7495 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4cb7495)
#49 0x0000000000dd9541 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdd9541)
#50 0x0000000000c96be4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc96be4)
#51 0x00007ee985629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#52 0x00007ee985629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#53 0x0000000000dd3635 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdd3635)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```
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