gcc/testsuite/c-c++-common/cilk-plus/PS/reduction-2.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O3 -fcilkplus" } */
   3
   4 /* FIXME: This test has been xfailed until reductions are fixed.  */
   5
   6 #include <stdio.h>
   7
   8 #define ARRAY_SIZE  (256)
   9 int a[ARRAY_SIZE];
  10
  11 __attribute__((noinline))
  12 int addit (int *arr, int N)
  13 {
  14   int s=0;
  15 #pragma simd reduction (+:s)
  16   for (int i = 0; i < N; i++)
  17     s += arr[i];
  18   return s;
  19 }
  20
  21 int main () {
  22   int i, s = 0, r = 0;
  23   for (i = 0; i < ARRAY_SIZE; i++)
  24     {
  25       a[i] = i;
  26     }
  27
  28   s = addit (a, ARRAY_SIZE);
  29
  30   for (i = 0; i < ARRAY_SIZE; i++)
  31     r += i;
  32
  33   if (s == r)
  34     return 0;
  35   return 1;
  36 }