| Issue |
175540
|
| Summary |
clang crashed with asm goto : error in backend: Broken module found, compilation aborted!
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
iamanonymouscs
|
clang crashed with `asm goto`
Compiler Explorer: https://godbolt.org/z/fah4xhzKa
```
$ cat small.c
int b;
void *c;
void e() {
__asm__ goto("" : : : : d);
int(*a)[b] = c;
d:
a[0];
}
```
Crashed with `-O0`:
```
<source>:7:6: warning: _expression_ result unused [-Wunused-value]
7 | a[0];
| ~ ~^
Instruction does not dominate all uses!
%1 = zext i32 %0 to i64, !dbg !25
%4 = mul nsw i64 0, %1, !dbg !35
fatal error: error in backend: Broken module found, compilation aborted!
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 -O0 <source>
1. <eof> parser at end of file
2. Optimizer
3. Running pass "verify" on module "<source>"
#0 0x000000000430abe8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x430abe8)
#1 0x0000000004308014 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4308014)
#2 0x000000000424af66 llvm::CrashRecoveryContext::HandleExit(int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x424af66)
#3 0x00000000042ff4de llvm::sys::Process::Exit(int, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x42ff4de)
#4 0x0000000000de6190 LLVMErrorHandler(void*, char const*, bool) cc1_main.cpp:0:0
#5 0x0000000004255183 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4255183)
#6 0x00000000042552e1 (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x42552e1)
#7 0x0000000003c82e38 (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3c82e38)
#8 0x00000000045bc5ee llvm::detail::PassModel<llvm::Module, llvm::VerifierPass, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x45bc5ee)
#9 0x0000000003c4a251 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3c4a251)
#10 0x00000000045c8acc (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>&, std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) BackendUtil.cpp:0:0
#11 0x00000000045cc3f0 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-trunk/bin/clang+0x45cc3f0)
#12 0x0000000004c6d697 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4c6d697)
#13 0x0000000006a3fdbc clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x6a3fdbc)
#14 0x0000000004c6daf8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4c6daf8)
#15 0x0000000004f66ee5 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4f66ee5)
#16 0x0000000004ee6d1e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4ee6d1e)
#17 0x000000000506158d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x506158d)
#18 0x0000000000de8a9e cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xde8a9e)
#19 0x0000000000ddf46a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#20 0x0000000000ddf5ed 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
#21 0x0000000004ce0b39 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
#22 0x000000000424aea4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x424aea4)
#23 0x0000000004ce114f 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
#24 0x0000000004ca1ae2 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4ca1ae2)
#25 0x0000000004ca2a8e 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+0x4ca2a8e)
#26 0x0000000004ca9ee5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4ca9ee5)
#27 0x0000000000de4e11 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xde4e11)
#28 0x0000000000c8f104 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xc8f104)
#29 0x00007f60ec829d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#30 0x00007f60ec829e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#31 0x0000000000ddef05 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xddef05)
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Compiler returned: 70
```
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