| Issue |
173496
|
| Summary |
Clang-17 With Assertion Crashes with Inline Assembly
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
cactusBalll
|
Compiler Explore：https://godbolt.org/z/cY5csW58o
Related to #118247 possibly.
```c++
int main() {
unsigned arg1 = 100;
unsigned arg2 = 200;
asm volatile (
"movl %[arg1], %%ecx\n\t"
"addl %[arg2], %[arg1]\n\t"
"addl %[arg2], %%ecx\n\t"
"rcl $0, %%ecx"
: [arg1] "+&abdSD" (arg1), [arg2] "+&abdSD" (arg2)
:
: "cc", "ecx"
);
return 0;
}
```
```
clang++: /root/llvm-project/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp:1596: void {anonymous}::TwoAddressInstructionImpl::processTiedPairs(llvm::MachineInstr*, {anonymous}::TwoAddressInstructionImpl::TiedPairList&, unsigned int&): Assertion `i == DstIdx || !MI->getOperand(i).isReg() || MI->getOperand(i).getReg() != RegA' 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-21.1.0/bin/clang++ -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-15.2.0 -fcolor-diagnostics -fno-crash-diagnostics -O3 <source>
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module '<source>'.
4. Running pass 'Two-Address instruction pass' on function '@main'
#0 0x0000000004019ae8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4019ae8)
#1 0x0000000004016f14 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4016f14)
#2 0x0000000003f5b698 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x0000739506a42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x0000739506a969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x0000739506a42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x0000739506a287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x0000739506a2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x0000739506a39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x0000000003643191 (anonymous namespace)::TwoAddressInstructionImpl::processTiedPairs(llvm::MachineInstr*, llvm::SmallVector<std::pair<unsigned int, unsigned int>, 4u>&, unsigned int&) TwoAddressInstructionPass.cpp:0:0
#10 0x0000000003644dbd (anonymous namespace)::TwoAddressInstructionImpl::run() TwoAddressInstructionPass.cpp:0:0
#11 0x0000000003646e77 (anonymous namespace)::TwoAddressInstructionLegacyPass::runOnMachineFunction(llvm::MachineFunction&) TwoAddressInstructionPass.cpp:0:0
#12 0x000000000331d873 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#13 0x0000000003944d8f llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x3944d8f)
#14 0x0000000003945141 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x3945141)
#15 0x00000000039459b1 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x39459b1)
#16 0x00000000042d2791 clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x42d2791)
#17 0x00000000049cf623 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x49cf623)
#18 0x00000000066ca95c clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x66ca95c)
#19 0x00000000049cfa28 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x49cfa28)
#20 0x0000000004cc9f95 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4cc9f95)
#21 0x0000000004c4688e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4c4688e)
#22 0x0000000004dbc2e1 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4dbc2e1)
#23 0x0000000000d93cff cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0xd93cff)
#24 0x0000000000d8a8ba ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#25 0x0000000004a36b79 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
#26 0x0000000003f5bb34 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x3f5bb34)
#27 0x0000000004a3718f 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
#28 0x00000000049f915d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x49f915d)
#29 0x00000000049fa1ee clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x49fa1ee)
#30 0x0000000004a02d85 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0x4a02d85)
#31 0x0000000000d9018f clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0xd9018f)
#32 0x0000000000c444d4 main (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0xc444d4)
#33 0x0000739506a29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#34 0x0000739506a29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#35 0x0000000000d8a365 _start (/opt/compiler-explorer/clang-assertions-21.1.0/bin/clang+++0xd8a365)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```
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