[llvm-bugs] [Bug 31417] New: assert failure when compiling trivial openmp program

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31417

            Bug ID: 31417
           Summary: assert failure when compiling trivial openmp program
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: yaron.keren at gmail.com
                CC: a.bataev at hotmail.com, kiyolee at hotmail.com,
                    llvm-bugs at lists.llvm.org
    Classification: Unclassified

$ cat file1.cpp
void foo() {
#pragma omp target
  ;
}

$ clang -fopenmp -fopenmp-targets=nvptx-nvidia-cuda -emit-llvm-bc -o a.bc
file1.cpp
#0 0x00000000016e12a5 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/local/bin/clang-4.0+0x16e12a5)
#1 0x00000000016e18f6 SignalHandler(int) (/usr/local/bin/clang-4.0+0x16e18f6)
#2 0x00007f2e6ac67390 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x11390)
#3 0x000000000118ec6a
llvm::MachineBasicBlock::addSuccessor(llvm::MachineBasicBlock*,
llvm::BranchProbability) (/usr/local/bin/clang-4.0+0x118ec6a)
#4 0x0000000001cbf11a llvm::SelectionDAGBuilder::visitBr(llvm::BranchInst
const&) (/usr/local/bin/clang-4.0+0x1cbf11a)
#5 0x0000000001cbd0f2 llvm::SelectionDAGBuilder::visit(llvm::Instruction
const&) (/usr/local/bin/clang-4.0+0x1cbd0f2)
#6 0x0000000001d34d80
llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction,
false, false, void>, false, true>,
llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false,
false, void>, false, true>, bool&) (/usr/local/bin/clang-4.0+0x1d34d80)
#7 0x0000000001d3439d
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&)
(/usr/local/bin/clang-4.0+0x1d3439d)
#8 0x0000000001d32717
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&)
(/usr/local/bin/clang-4.0+0x1d32717)
#9 0x00000000011b26d6 llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
(/usr/local/bin/clang-4.0+0x11b26d6)
#10 0x00000000013b5b33 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/usr/local/bin/clang-4.0+0x13b5b33)
#11 0x00000000013b5d23 llvm::FPPassManager::runOnModule(llvm::Module&)
(/usr/local/bin/clang-4.0+0x13b5d23)
#12 0x00000000013b6108 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/usr/local/bin/clang-4.0+0x13b6108)
#13 0x0000000001824ba2 clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions
const&, llvm::DataLayout const&, llvm::Module*, clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/usr/local/bin/clang-4.0+0x1824ba2)
#14 0x0000000001dce7dd
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/usr/local/bin/clang-4.0+0x1dce7dd)
#15 0x000000000218dbb6 clang::ParseAST(clang::Sema&, bool, bool)
(/usr/local/bin/clang-4.0+0x218dbb6)
#16 0x0000000001b3ac3f clang::FrontendAction::Execute()
(/usr/local/bin/clang-4.0+0x1b3ac3f)
#17 0x0000000001b04708
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/usr/local/bin/clang-4.0+0x1b04708)
#18 0x0000000001baec5c
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/usr/local/bin/clang-4.0+0x1baec5c)
#19 0x00000000007f2fdc cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/usr/local/bin/clang-4.0+0x7f2fdc)
#20 0x00000000007f1be6 main (/usr/local/bin/clang-4.0+0x7f1be6)
#21 0x00007f2e697bd830 __libc_start_main
/build/glibc-t3gR2i/glibc-2.23/csu/../csu/libc-start.c:325:0
#22 0x00000000007ef069 _start (/usr/local/bin/clang-4.0+0x7ef069)
Stack dump:
0.      Program arguments: /usr/local/bin/clang-4.0 -cc1 -triple
nvptx-nvidia-cuda -S -disable-free -disable-llvm-verifier -discard-value-names
-main-file-name file1.cpp -mrelocation-model pic -pic-level 2 -mthread-model
posix -mdisable-fp-elim -fmath-errno -no-integrated-as -dwarf-column-info
-debugger-tuning=gdb -resource-dir /usr/local/bin/../lib/clang/4.0.0
-fdeprecated-macro -fno-dwarf-directory-asm -fdebug-compilation-dir /a/b/c
-ferror-limit 19 -fmessage-length 136 -fopenmp -fobjc-runtime=gcc
-fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o
/tmp/file1-7803ff.s -x c++ file1.cpp -fopenmp-is-device
-fopenmp-host-ir-file-path /tmp/file1-72cf26.bc
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module 'file1.cpp'.
4.      Running pass 'NVPTX DAG->DAG Pattern Instruction Selection' on function
'@__omp_offloading_802_363c14__Z3foov_l2'
clang-4.0: error: unable to execute command: Segmentation fault (core dumped)
clang-4.0: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 4.0.0 (trunk 289871)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
clang-4.0: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and
associated run script.
clang-4.0: note: diagnostic msg: Error generating preprocessed source(s).

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