gcc/testsuite/gcc.dg/vect/vect-reduc-6.c

   1 /* { dg-require-effective-target vect_float } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7 #define DIFF 242
   8
   9 __attribute__ ((noinline))
  10 int main1 (float x, float max_result)
  11 {
  12   int i;
  13   float b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  14   float c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  15   float diff = 2;
  16   float max = x;
  17   float min = 10;
  18
  19   for (i = 0; i < N; i++) {
  20     diff += (b[i] - c[i]);
  21   }
  22
  23   for (i = 0; i < N; i++) {
  24     max = max < c[i] ? c[i] : max;
  25   }
  26
  27   for (i = 0; i < N; i++) {
  28     min = min > c[i] ? c[i] : min;
  29   }
  30
  31   /* check results:  */
  32   if (diff != DIFF)
  33     abort ();
  34   if (max != max_result)
  35     abort ();
  36   if (min != 0)
  37     abort ();
  38
  39   return 0;
  40 }
  41
  42 int main (void)
  43 {
  44   check_vect ();
  45
  46   main1 (100 ,100);
  47   main1 (0, 15);
  48   return 0;
  49 }
  50
  51 /* need -ffast-math to vectorizer these loops.  */
  52 /* { dg-final { scan-tree-dump-times "vectorized 0 loops" 1 "vect" } } */
  53 /* { dg-final { cleanup-tree-dump "vect" } } */