| Issue |
203163
|
| Summary |
[clang][Matrix] Crash in Sema during nested matrix indexing
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
hongtaihu
|
This input is generated by a fuzzer.
https://godbolt.org/z/fPsGG11vd
```cxx
template <typename T, int R, int C> using m __attribute__((__matrix_type__(R,C))) = T;
double index1(m<double,3,1> X, int i) {
return X[0][i][0];
}
```
use
```
-std=c++11 -fenable-matrix -fsyntax-only
```
seems to be introduced since clang 11
stacktrace:
```
lang++: warning: argument unused during compilation: '-S' [-Wunused-command-line-argument]
clang++: /root/llvm-project/llvm/tools/clang/lib/Sema/SemaExpr.cpp:5085: clang::ExprResult clang::Sema::ActOnArraySubscriptExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, clang::MultiExprArg, clang::SourceLocation): Assertion `matSubscriptE->isIncomplete() && "base has to be an incomplete matrix subscript"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and dumped files.
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 -std=c++11 -fenable-matrix -fsyntax-only <source>
1. <source>:3:21: current parser token ']'
2. <source>:2:41: parsing function body 'index1'
3. <source>:2:41: in compound statement ('{}')
#0 0x0000000004385c18 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4385c18)
#1 0x0000000004382a54 llvm::sys::RunSignalHandlers() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4382a54)
#2 0x0000000004383074 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4383074)
#3 0x00000000042bf2f8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#4 0x0000781241445330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#5 0x000078124149eb2c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x9eb2c)
#6 0x000078124144527e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4527e)
#7 0x00007812414288ff abort (/lib/x86_64-linux-gnu/libc.so.6+0x288ff)
#8 0x000078124142881b (/lib/x86_64-linux-gnu/libc.so.6+0x2881b)
#9 0x000078124143b517 (/lib/x86_64-linux-gnu/libc.so.6+0x3b517)
#10 0x00000000071c41ff clang::Sema::ActOnArraySubscriptExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x71c41ff)
#11 0x0000000006cbc9d5 clang::Parser::ParsePostfixExpressionSuffix(clang::ActionResult<clang::Expr*, true>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cbc9d5)
#12 0x0000000006cb496a clang::Parser::ParseCastExpression(clang::CastParseKind, bool, bool&, clang::TypoCorrectionTypeBehavior, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cb496a)
#13 0x0000000006cb6c17 clang::Parser::ParseCastExpression(clang::CastParseKind, bool, clang::TypoCorrectionTypeBehavior, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cb6c17)
#14 0x0000000006cb6ca9 clang::Parser::ParseAssignmentExpression(clang::TypoCorrectionTypeBehavior) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cb6ca9)
#15 0x0000000006cbb309 clang::Parser::ParseExpression(clang::TypoCorrectionTypeBehavior) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6cbb309)
#16 0x0000000006d37045 clang::Parser::ParseReturnStatement() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6d37045)
#17 0x0000000006d3b4c3 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+++0x6d3b4c3)
#18 0x0000000006d3c409 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::LabelDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6d3c409)
#19 0x0000000006d44c2e clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6d44c2e)
#20 0x0000000006d4544a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6d4544a)
#21 0x0000000006c47da3 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c47da3)
#22 0x0000000006c7ef63 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+++0x6c7ef63)
#23 0x0000000006c3b31b clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c3b31b)
#24 0x0000000006c3bb1f clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c3bb1f)
#25 0x0000000006c435d1 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c435d1)
#26 0x0000000006c444e5 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c444e5)
#27 0x0000000006c253ca clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c253ca)
#28 0x00000000051a9458 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x51a9458)
#29 0x0000000005126c9d clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5126c9d)
#30 0x00000000052a803d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x52a803d)
#31 0x0000000000e21efc cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xe21efc)
#32 0x0000000000e18b9a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#33 0x0000000000e18d1d 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
#34 0x0000000004ee4b39 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
#35 0x00000000042bf734 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42bf734)
#36 0x0000000004ee5186 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
#37 0x0000000004ea2102 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ea2102)
#38 0x0000000004ea30ae 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+++0x4ea30ae)
#39 0x0000000004eab3a5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4eab3a5)
#40 0x0000000000e1e432 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xe1e432)
#41 0x0000000000cc210a main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcc210a)
#42 0x000078124142a1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
#43 0x000078124142a28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
#44 0x0000000000e18545 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xe18545)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
Compiler returned: 134
```
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