[llvm-bugs] [Bug 49813] New: OpenMP offload runtime Floating point exception with 1 helper thread

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49813

            Bug ID: 49813
           Summary: OpenMP offload runtime Floating point exception with 1
                    helper thread
           Product: OpenMP
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Runtime Library
          Assignee: unassignedbugs at nondot.org
          Reporter: xw111luoye at gmail.com
                CC: llvm-bugs at lists.llvm.org

Using commit df4fa53fddb61c2514e7e09fb7cdde53edced958

$ clang++ -fopenmp -fopenmp-targets=nvptx64 task.cpp
$ LIBOMP_USE_HIDDEN_HELPER_TASK=ON LIBOMP_NUM_HIDDEN_HELPER_THREADS=1 ./a.out 
start
Floating point exception

source code:
#include <iostream>

int main()
{
  int a[128];
  #pragma omp target enter data map(alloc: a[:128])
  {
    std::cout << "start" << std::endl;
    #pragma omp target update to(a[:128]) nowait
    #pragma omp taskwait
    std::cout << "after taskwait" << std::endl;
  }
  #pragma omp target exit data map(delete: a[:128])
}

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