openmp/runtime/test/tasking/task_reduction2.c

   1 // RUN: %libomp-compile-and-run
   2 //
   3 // XFAIL: icc
   4 // UNSUPPORTED: clang-4, clang-5, clang-6, clang-7, clang-8, clang-9, clang-10
   5 // UNSUPPORTED: gcc-4, gcc-5, gcc-6, gcc-7, gcc-8
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9
  10 int a = 0, b = 1;
  11
  12 int main(int argc, char **argv) {
  13
  14   #pragma omp parallel
  15   {
  16     int i;
  17     #pragma omp for reduction(task, +: a) reduction(task, *: b)
  18     for (i = 1; i <= 5; ++i) {
  19       #pragma omp task in_reduction(+: a) in_reduction(*: b)
  20       {
  21         a += i;
  22         b *= i;
  23       }
  24     }
  25   }
  26
  27   if (a != 15) {
  28     fprintf(stderr, "error: a != 15. Instead a = %d\n", a);
  29     exit(EXIT_FAILURE);
  30   }
  31   if (b != 120) {
  32     fprintf(stderr, "error: b != 120. Instead b = %d\n", b);
  33     exit(EXIT_FAILURE);
  34   }
  35
  36   return EXIT_SUCCESS;
  37 }