gcc/testsuite/gcc.dg/vect/no-fast-math-vect16.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 240
   8
   9 __attribute__ ((noinline))
  10 int main1 ()
  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;
  16
  17   diff = 0;
  18   for (i = 0; i < N; i++) {
  19     diff += (b[i] - c[i]);
  20   }
  21
  22   /* check results:  */
  23   if (diff != DIFF)
  24     abort ();
  25
  26   return 0;
  27 }
  28
  29 int main (void)
  30 {
  31   check_vect ();
  32
  33   return main1 ();
  34 }
  35
  36 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  37 /* { dg-final { scan-tree-dump-times {using an in-order \(fold-left\) reduction} 1 "vect" } } */