gcc/testsuite/gcc.dg/autopar/reduc-1short.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -ftree-parallelize-loops=4 -fdump-tree-parloops-details -fdump-tree-final_cleanup" } */
   3
   4 #include <stdarg.h>
   5 #include <stdlib.h>
   6
   7 #define N 16
   8 #define DIFF 242
   9
  10 __attribute__ ((noinline)) void
  11 main1 (unsigned short x, unsigned short max_result, unsigned short min_result)
  12 {
  13   int i;
  14   unsigned short ub[N] = {1,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  15   unsigned short uc[N] = {1,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  16   unsigned short  udiff = 2;
  17   unsigned short umax = x;
  18   unsigned short umin = x;
  19
  20   for (i = 0; i < N; i++) {
  21     udiff += (unsigned short)(ub[i] - uc[i]);
  22   }
  23
  24   for (i = 0; i < N; i++) {
  25     umax = umax < uc[i] ? uc[i] : umax;
  26   }
  27
  28   for (i = 0; i < N; i++) {
  29     umin = umin > uc[i] ? uc[i] : umin;
  30   }
  31
  32   /* check results:  */
  33   if (udiff != DIFF)
  34     abort ();
  35   if (umax != max_result)
  36     abort ();
  37   if (umin != min_result)
  38     abort ();
  39 }
  40
  41 int main (void)
  42 {
  43   main1 (100, 100, 1);
  44   main1 (0, 15, 0);
  45   return 0;
  46 }
  47
  48 /* { dg-final { scan-tree-dump-times "Detected reduction" 3 "parloops" } } */
  49 /* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 3 "parloops" } } */
  50 /* { dg-final { cleanup-tree-dump "parloops" } } */
  51 /* { dg-final { cleanup-tree-dump "final_cleanup" } } */
  52