| Issue |
129995
|
| Summary |
[RISCV] Crash in `detectVLSCCEligibleStruct`
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
michalt
|
We found a crash when compiling internal code; creduced repro:
```
> cat galois_field-d4307d.cpp
struct a {
using b = char __attribute__((vector_size(sizeof(char))));
};
class c {
using d = a::b;
d e;
public:
static c f();
};
class g {
public:
template <class h> g(h);
friend g operator^(g, g) { c::f; }
friend g operator^=(g i, g j) { i ^ j; }
};
template <typename, int> using k = g;
template <typename l> using m = k<l, sizeof(l)>;
void n() {
void o();
m<char> p = o ^= p;
}
```
Results in:
```
clang "-cc1" "-triple" "riscv64-unknown-linux-musl" "-emit-obj" "-target-cpu" "generic-rv64" "-target-feature" "+m" "-target-feature" "+a" "-target-feature" "+f" "-target-feature" "+d" "-target-feature" "+c" "-target-feature" "+v" "-target-feature" "-b" "-target-feature" "-e" "-target-feature" "-h" "-target-abi" "lp64d" "-O1" "-std=gnu++20" "-x" "c++" "galois_field-d4307d.cpp"
galois_field-d4307d.cpp:14:30: warning: _expression_ result unused [-Wunused-value]
14 | friend g operator^(g, g) { c::f; }
| ^~~~
galois_field-d4307d.cpp:14:36: warning: non-void function does not return a value [-Wreturn-type]
14 | friend g operator^(g, g) { c::f; }
| ^
galois_field-d4307d.cpp:15:42: warning: non-void function does not return a value [-Wreturn-type]
15 | friend g operator^=(g i, g j) { i ^ j; }
| ^
galois_field-d4307d.cpp:21:20: warning: variable 'p' is uninitialized when used within its own initialization [-Wuninitialized]
21 | m<char> p = o ^= p;
| ~ ^
F0000 00:00:1741242680.668504 1430842 logging.cc:62] assert.h assertion failed at llvm/include/llvm/Support/MathExtras.h:405 in T llvm::divideCeil(U, V) [U = unsigned int, V = unsigned int, T = unsigned int]: Denominator && "Division by zero"
*** Check failure stack trace: ***
@ 0x5610c7648dd9 absl::log_internal::LogMessage::PrepareToDie()
@ 0x5610c7648377 absl::log_internal::LogMessage::SendToLog()
@ 0x5610c764832b absl::log_internal::LogMessage::Flush()
@ 0x5610bcc4cb45 absl::log_internal::Voidify::operator&&<>()
@ 0x5610c7567eaa __assert_fail
@ 0x5610b7bc02c1 llvm::divideCeil<>()
@ 0x5610b8f571de (anonymous namespace)::RISCVABIInfo::detectVLSCCEligibleStruct()
@ 0x5610b8f55fe4 (anonymous namespace)::RISCVABIInfo::classifyArgumentType()
@ 0x5610b8f559b6 (anonymous namespace)::RISCVABIInfo::classifyReturnType()
@ 0x5610b8f54d81 (anonymous namespace)::RISCVABIInfo::computeInfo()
@ 0x5610b7b3d914 clang::CodeGen::CodeGenTypes::arrangeLLVMFunctionInfo()
@ 0x5610b7b3df6d arrangeLLVMFunctionInfo()
@ 0x5610b7b3dd3e clang::CodeGen::CodeGenTypes::arrangeFreeFunctionType()
@ 0x5610b8d5f20d clang::CodeGen::CodeGenTypes::ConvertFunctionTypeInternal()
@ 0x5610b8d5d789 clang::CodeGen::CodeGenTypes::ConvertType()
@ 0x5610b8a44f61 clang::CodeGen::CodeGenModule::GetAddrOfFunction()
@ 0x5610b7ce4ed5 clang::CodeGen::CodeGenModule::getRawFunctionPointer()
@ 0x5610b7c39cfb clang::CodeGen::CodeGenModule::getFunctionPointer()
@ 0x5610b7ce6b76 EmitFunctionDeclLValue()
@ 0x5610b7cd3ca9 clang::CodeGen::CodeGenFunction::EmitDeclRefLValue()
@ 0x5610b7cd02c6 clang::CodeGen::CodeGenFunction::EmitLValueHelper()
@ 0x5610b7d054ab clang::CodeGen::CodeGenFunction::EmitLValue()::$_0::operator()()
@ 0x5610b7d05428 llvm::function_ref<>::callback_fn<>()
@ 0x5610ba1c919c llvm::function_ref<>::operator()()
@ 0x5610be2b4133 clang::runWithSufficientStackSpace()
@ 0x5610be2b3f33 clang::StackExhaustionHandler::runWithSufficientStackSpace()
@ 0x5610b8a24a3d clang::CodeGen::CodeGenModule::runWithSufficientStackSpace()
@ 0x5610b7cbe553 clang::CodeGen::CodeGenFunction::EmitLValue()
@ 0x5610b7cbdf8d clang::CodeGen::CodeGenFunction::EmitIgnoredExpr()
@ 0x5610b80543f2 clang::CodeGen::CodeGenFunction::EmitStmt()
@ 0x5610b8062bf4 clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope()
@ 0x5610b89ef9b4 clang::CodeGen::CodeGenFunction::EmitFunctionBody()
@ 0x5610b89f0fd8 clang::CodeGen::CodeGenFunction::GenerateCode()
@ 0x5610b8a41acc clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition()
@ 0x5610b8a319e1 clang::CodeGen::CodeGenModule::EmitGlobalDefinition()
@ 0x5610b8a1fa13 clang::CodeGen::CodeGenModule::EmitDeferred()
@ 0x5610b8a1fa83 clang::CodeGen::CodeGenModule::EmitDeferred()
@ 0x5610b8a18e1d clang::CodeGen::CodeGenModule::Release()
@ 0x5610b8e291f5 (anonymous namespace)::CodeGeneratorImpl::HandleTranslationUnit()
@ 0x5610b7b19135 clang::BackendConsumer::HandleTranslationUnit()
@ 0x5610ba606281 clang::ParseAST()
@ 0x5610b9fec3e3 clang::ASTFrontendAction::ExecuteAction()
@ 0x5610b7b1f40d clang::CodeGenAction::ExecuteAction()
@ 0x5610b9feb9eb clang::FrontendAction::Execute()
@ 0x5610b9e9d3cb clang::CompilerInstance::ExecuteAction()
@ 0x5610b7b0e405 clang::ExecuteCompilerInvocation()
@ 0x5610b7add5c6 cc1_main()
@ 0x5610b7acaf66 ExecuteCC1Tool()
@ 0x5610b7ac9773 clang_main()
@ 0x5610b7ac91cb main
@ 0x7ff9e62753d4 __libc_start_main
@ 0x5610b7ac90aa _start
PLEASE submit a bug report to http://go/clang-crash-bug and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: clang -cc1 -triple riscv64-unknown-linux-musl -emit-obj -target-cpu generic-rv64 -target-feature +m -target-feature +a -target-feature +f -target-feature +d -target-feature +c -target-feature +v -target-feature -b -target-feature -e -target-feature -h -target-abi lp64d -O1 -std=gnu++20 -x c++ galois_field-d4307d.cpp
1. <eof> parser at end of file
2. Per-file LLVM IR generation
3. galois_field-d4307d.cpp:14:12: Generating code for declaration 'operator^'
```
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