| Issue |
54195
|
| Summary |
clang crashes at -Os and above: Assertion `Parent == Other->Parent && "cross-BB instruction order comparison"' failed
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
zhendongsu
|
It appears to be a recent regression.
```
[519] % clangtk -v
clang version 15.0.0 (https://github.com/llvm/llvm-project.git 9c300c18a4eaf79eb7044744bbdb705764579220)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /local/suz-local/opfuzz/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
[520] %
[520] % clangtk -O1 small.c; ./a.out
[521] %
[521] % clangtk -Os small.c
clang-15: /local/suz-local/software/clangbuild/llvm-project/llvm/lib/IR/Instruction.cpp:113: bool llvm::Instruction::comesBefore(const llvm::Instruction*) const: Assertion `Parent == Other->Parent && "cross-BB instruction order comparison"' 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: /local/suz-local/software/local/clang-trunk/bin/clang-15 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj --mrelax-relocations -disable-free -clear-ast-before-backend -main-file-name small.c -mrelocation-model static -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -fcoverage-compilation-dir=/local/suz-local/software/emitesting/bugs/20220304-clangtk-m64-O3-mllvm-polly-build-065732/delta -resource-dir /local/suz-local/software/local/clang-trunk/lib/clang/15.0.0 -I /usr/local/include/csmith -I /local/suz-local/software/local/include -internal-isystem /local/suz-local/software/local/clang-trunk/lib/clang/15.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.5.0/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -Os -fdebug-compilation-dir=/local/suz-local/software/emitesting/bugs/20220304-clangtk-m64-O3-mllvm-polly-build-065732/delta -ferror-limit 19 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/small-31cde7.o -x c small.c
1. <eof> parser at end of file
2. Optimizer
#0 0x000055e048fcc0af PrintStackTraceSignalHandler(void*) Signals.cpp:0:0
#1 0x000055e048fc986d SignalHandler(int) Signals.cpp:0:0
#2 0x00007f2982c1b980 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x12980)
#3 0x00007f29818cce87 raise /build/glibc-uZu3wS/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#4 0x00007f29818ce7f1 abort /build/glibc-uZu3wS/glibc-2.27/stdlib/abort.c:81:0
#5 0x00007f29818be3fa __assert_fail_base /build/glibc-uZu3wS/glibc-2.27/assert/assert.c:89:0
#6 0x00007f29818be472 (/lib/x86_64-linux-gnu/libc.so.6+0x30472)
#7 0x000055e0486a443c (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x31b943c)
#8 0x000055e0480861ec llvm::RecurrenceDescriptor::isFirstOrderRecurrence(llvm::PHINode*, llvm::Loop*, llvm::MapVector<llvm::Instruction*, llvm::Instruction*, llvm::DenseMap<llvm::Instruction*, unsigned int, llvm::DenseMapInfo<llvm::Instruction*, void>, llvm::detail::DenseMapPair<llvm::Instruction*, unsigned int> >, std::vector<std::pair<llvm::Instruction*, llvm::Instruction*>, std::allocator<std::pair<llvm::Instruction*, llvm::Instruction*> > > >&, llvm::DominatorTree*) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x2b9b1ec)
#9 0x000055e0492a0b22 llvm::LoopVectorizationLegality::canVectorizeInstrs() (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x3db5b22)
#10 0x000055e0492a21f6 llvm::LoopVectorizationLegality::canVectorize(bool) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x3db71f6)
#11 0x000055e0491fd5a3 llvm::LoopVectorizePass::processLoop(llvm::Loop*) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x3d125a3)
#12 0x000055e049200601 llvm::LoopVectorizePass::runImpl(llvm::Function&, llvm::ScalarEvolution&, llvm::LoopInfo&, llvm::TargetTransformInfo&, llvm::DominatorTree&, llvm::BlockFrequencyInfo&, llvm::TargetLibraryInfo*, llvm::DemandedBits&, llvm::AAResults&, llvm::AssumptionCache&, std::function<llvm::LoopAccessInfo const& (llvm::Loop&)>&, llvm::OptimizationRemarkEmitter&, llvm::ProfileSummaryInfo*) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x3d15601)
#13 0x000055e049200b99 llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x3d15b99)
#14 0x000055e04a1f3471 llvm::detail::PassModel<llvm::Function, llvm::LoopVectorizePass, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function> >::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x4d08471)
#15 0x000055e048731d7c llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function> >::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x3246d7c)
#16 0x000055e046bce721 llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function> >, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function> >::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x16e3721)
#17 0x000055e04873179a llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x324679a)
#18 0x000055e046bcf081 llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module> >::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x16e4081)
#19 0x000055e04872ff54 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module> >::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x3244f54)
#20 0x000055e049308dc0 (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> >&) (.constprop.836) BackendUtil.cpp:0:0
#21 0x000055e04930bd92 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x3e20d92)
#22 0x000055e04a0183fb clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x4b2d3fb)
#23 0x000055e04af23c89 clang::ParseAST(clang::Sema&, bool, bool) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x5a38c89)
#24 0x000055e04a016ef8 clang::CodeGenAction::ExecuteAction() (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x4b2bef8)
#25 0x000055e0499aea21 clang::FrontendAction::Execute() (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x44c3a21)
#26 0x000055e049948fca clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x445dfca)
#27 0x000055e049a7c873 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x4591873)
#28 0x000055e04690bc31 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x1420c31)
#29 0x000055e046907ac9 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#30 0x000055e04682dda9 main (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x1342da9)
#31 0x00007f29818afc87 __libc_start_main /build/glibc-uZu3wS/glibc-2.27/csu/../csu/libc-start.c:344:0
#32 0x000055e04690763a _start (/local/suz-local/software/local/clang-trunk/bin/clang-15+0x141c63a)
clang-15: error: unable to execute command: Aborted
clang-15: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 15.0.0 (https://github.com/llvm/llvm-project.git 9c300c18a4eaf79eb7044744bbdb705764579220)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /local/suz-local/opfuzz/bin
clang-15: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-15: note: diagnostic msg: /tmp/small-40dda2.c
clang-15: note: diagnostic msg: /tmp/small-40dda2.sh
clang-15: note: diagnostic msg:
********************
[522] %
[522] % cat small.c
int printf(const char *, ...);
int u;
void a() {
char b;
unsigned c;
char d;
long e;
while (u) {
char f;
int g = 0;
L:
g = b = (d - e) / d;
d = ~c & 6;
c = -b;
e = ~0 % c;
if (!e)
continue;
printf("%d", c);
goto L;
}
}
int main() {
a();
return 0;
}
```
Compiler Explorer: https://godbolt.org/z/9KMKddv5G
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