[llvm-bugs] [Bug 38494] New: clang crashes at -O3 -mllvm -polly -mllvm -polly-parallel

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38494

            Bug ID: 38494
           Summary: clang crashes at -O3 -mllvm -polly -mllvm
                    -polly-parallel
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: m-takahiro at jp.fujitsu.com
                CC: llvm-bugs at lists.llvm.org

The following is a test program.

------------ foo.c ------------
#define NI (32)
#define NJ (32)
#define NK (32)
#define NA (32)

void test(double r[NI][NJ][NK], double s[NI][NJ][NK],
          int II, int JJ, int KK, int A) {
  for (int i = 0; i < II; ++i)
    for (int j = 0; j < JJ; ++j)
      for (int k = 0; k < KK; ++k)
              r[i][j][k] = (s[i][j][k]) * i - j * k + A;
}
-------------------------------

$ clang -O3 -mllvm -polly -mllvm -polly-parallel foo.c
...
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module 'foo.c'.
4.      Running pass 'Machine Common Subexpression Elimination' on function
'@test_polly_subfn'
#0 0x000000000177cfda llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x177cfda)
#1 0x000000000177b7b9 llvm::sys::RunSignalHandlers()
(/opt/llvm/svn-trunk/install/bin/clang-8+0x177b7b9)
#2 0x000000000177b8ed SignalHandler(int)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x177b8ed)
#3 0x00007f33e50c55e0 __restore_rt (/lib64/libpthread.so.0+0xf5e0)
#4 0x00000000011e27b6 (anonymous
namespace)::MachineCSE::PerformCSE(llvm::DomTreeNodeBase<llvm::MachineBasicBlock>*)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x11e27b6)
#5 0x00000000010a3397 llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x10a3397)
#6 0x0000000001375d2f llvm::FPPassManager::runOnFunction(llvm::Function&)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x1375d2f)
#7 0x0000000001375f13 llvm::FPPassManager::runOnModule(llvm::Module&)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x1375f13)
#8 0x00000000013765bf llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x13765bf)
#9 0x000000000191f4ff (anonymous
namespace)::EmitAssemblyHelper::EmitAssembly(clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x191f4ff)
#10 0x0000000001920e0b 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_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x1920e0b)
#11 0x00000000020fe676
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x20fe676)
#12 0x00000000025b651a clang::ParseAST(clang::Sema&, bool, bool)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x25b651a)
#13 0x00000000020fdea4 clang::CodeGenAction::ExecuteAction()
(/opt/llvm/svn-trunk/install/bin/clang-8+0x20fdea4)
#14 0x0000000001d0fede clang::FrontendAction::Execute()
(/opt/llvm/svn-trunk/install/bin/clang-8+0x1d0fede)
#15 0x0000000001ce5c9d
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x1ce5c9d)
#16 0x0000000001da7a61
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/opt/llvm/svn-trunk/install/bin/clang-8+0x1da7a61)
#17 0x0000000000abf0c8 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/opt/llvm/svn-trunk/install/bin/clang-8+0xabf0c8)
#18 0x0000000000a4ab69 main (/opt/llvm/svn-trunk/install/bin/clang-8+0xa4ab69)
#19 0x00007f33e3ca9c05 __libc_start_main
/usr/src/debug/glibc-2.17-c758a686/csu/../csu/libc-start.c:308:0
#20 0x0000000000abb687 _start
(/opt/llvm/svn-trunk/install/bin/clang-8+0xabb687)
clang-8: error: unable to execute command: Segmentation fault (core dumped)
clang-8: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 8.0.0 (trunk 339303)
Target: x86_64-unknown-linux-gnu
Thread model: posix

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