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

   1 /* Disabling epilogues until we find a better way to deal with scans.  */
   2 /* { dg-additional-options "--param vect-epilogues-nomask=0" } */
   3 /* { dg-require-effective-target vect_float_strict } */
   4 /* { dg-additional-options "-fno-fast-math" } */
   5
   6 #include <stdarg.h>
   7 #include "tree-vect.h"
   8
   9 #define N 16
  10 #define DIFF 242
  11
  12 __attribute__ ((noinline))
  13 int main1 (float x, float max_result)
  14 {
  15   int i;
  16   float b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  17   float c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  18   float diff = 2;
  19   float max = x;
  20   float min = 10;
  21
  22   for (i = 0; i < N; i++) {
  23     diff += (b[i] - c[i]);
  24   }
  25
  26   for (i = 0; i < N; i++) {
  27     max = max < c[i] ? c[i] : max;
  28   }
  29
  30   for (i = 0; i < N; i++) {
  31     min = min > c[i] ? c[i] : min;
  32   }
  33
  34   /* check results:  */
  35   if (diff != DIFF)
  36     abort ();
  37   if (max != max_result)
  38     abort ();
  39   if (min != 0)
  40     abort ();
  41
  42   return 0;
  43 }
  44
  45 int main (void)
  46 {
  47   check_vect ();
  48
  49   main1 (100 ,100);
  50   main1 (0, 15);
  51   return 0;
  52 }
  53
  54 /* { dg-final { scan-tree-dump-times {using an in-order \(fold-left\) reduction} 1 "vect" } } */
  55 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */