https://bugs.llvm.org/show_bug.cgi?id=34137
Bug ID: 34137
Summary: clang crash in llvm::SelectionDAG::Combine on -O0
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
Assignee: unassignedb...@nondot.org
Reporter: babo...@gmail.com
CC: llvm-bugs@lists.llvm.org
clang version 6.0.0 (trunk 310534)
Target: x86_64-unknown-linux-gnu
> cat f.cpp
extern unsigned short var_3;
extern unsigned short var_13;
extern bool var_85;
extern unsigned long long int var_212;
void foo() {
int a(var_3 & (var_3 & var_13));
var_212 = (!(var_3 & (var_3 & var_13))) & var_3;
short b = var_85;
}
> clang++ -O0 -c f.cpp
clang-6.0:
/llvm/llvm-trunk-20170809/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1433: void
(anonymous namespace)::DAGCombiner::Run(llvm::CombineLevel): Assertion
`N->getOpcode() != ISD::DELETED_NODE && RV.getOpcode() != ISD::DELETED_NODE &&
"Node was deleted b
ut visit returned new node!"' failed.
#0 0x000000000131329f llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x131329f)
#1 0x00000000013135a6 SignalHandler(int)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x13135a6)
#2 0x00007f17b8a33370 __restore_rt (/lib64/libpthread.so.0+0xf370)
#3 0x00007f17b75af1d7 __GI_raise (/lib64/libc.so.6+0x351d7)
#4 0x00007f17b75b08c8 __GI_abort (/lib64/libc.so.6+0x368c8)
#5 0x00007f17b75a8146 __assert_fail_base (/lib64/libc.so.6+0x2e146)
#6 0x00007f17b75a81f2 (/lib64/libc.so.6+0x2e1f2)
#7 0x000000000192802b llvm::SelectionDAG::Combine(llvm::CombineLevel,
llvm::AAResults*, llvm::CodeGenOpt::Level)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x192802b)
#8 0x0000000001a5bda0 llvm::SelectionDAGISel::CodeGenAndEmitDAG()
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x1a5bda0)
#9 0x0000000001a597ad
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x1a597ad)
#10 0x0000000001a56244
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x1a56244)
#11 0x00000000008221d1 (anonymous
namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x8221d1)
#12 0x0000000000bbaf84
llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0xbbaf84)
#13 0x0000000000ebcbaf llvm::FPPassManager::runOnFunction(llvm::Function&)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0xebcbaf)
#14 0x0000000000ebce03 llvm::FPPassManager::runOnModule(llvm::Module&)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0xebce03)
#15 0x0000000000ebd2e6 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0xebd2e6)
#16 0x000000000148873f clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::HeaderSearchOptions const&, clang::CodeGenOptions const&,
clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout
const&, llvm::Module*, clang::BackendAction, std::unique_pt
r<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x148873f)
#17 0x0000000001b455f2
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x1b455f2)
#18 0x0000000001fbdde6 clang::ParseAST(clang::Sema&, bool, bool)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x1fbdde6)
#19 0x00000000018147e8 clang::FrontendAction::Execute()
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x18147e8)
#20 0x00000000017d8111
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x17d8111)
#21 0x000000000189c9c7
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/llvm/bin-trunk-20170809/bin/clang-6.0+0x189c9c7)
#22 0x000000000077864f cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/llvm/bin-trunk-20170809/bin/clang-6.0+0x77864f)
#23 0x0000000000776391 main (/llvm/bin-trunk-20170809/bin/clang-6.0+0x776391)
#24 0x00007f17b759bb35 __libc_start_main (/lib64/libc.so.6+0x21b35)
#25 0x0000000000773547 _start (/llvm/bin-trunk-20170809/bin/clang-6.0+0x773547)
Stack dump:
0. Program arguments: /llvm/bin-trunk-20170809/bin/clang-6.0 -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
f.cpp -mrelocation-model static -mthread-model posix -mdisable-fp-elim
-fmath-errno -masm-verbose -mco
nstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64
-dwarf-column-info -debugger-tuning=gdb -coverage-notes-file
/yarpgen/yarpgen/test_run_aug8_reduce/result/clang/compfail/S_3504450031/f.gcno
-resource-dir /llvm/bin-trunk-201
70809/lib/clang/6.0.0 -internal-isystem
/usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5
-internal-isystem
/usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../include/c++/4.8.5/x86_64-redhat-linux
-internal-isystem /usr/lib/gcc/x86_64-redhat-linux/4.8.5
/../../../../include/c++/4.8.5/backward -internal-isystem /usr/local/include
-internal-isystem /llvm/bin-trunk-20170809/lib/clang/6.0.0/include
-internal-externc-isystem /include -internal-externc-isystem /usr/include -O0
-fdeprecated-macro -fdebug-compilati
on-dir /yarpgen/yarpgen/test_run_aug8_reduce/result/clang/compfail/S_3504450031
-ferror-limit 19 -fmessage-length 272 -fobjc-runtime=gcc -fcxx-exceptions
-fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o f.o -x c++ f.cpp
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'f.cpp'.
4. Running pass 'X86 DAG->DAG Instruction Selection' on function
'@_Z3foov'
clang-6.0: error: unable to execute command: Aborted
clang-6.0: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 6.0.0 (trunk 310534)
Target: x86_64-unknown-linux-gnu
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