gcc/testsuite/gcc.dg/vect/vect-reduc-1.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7 #define DIFF 242
   8
   9 unsigned int ub[N] = {1,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  10 unsigned int uc[N] = {1,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  11
  12 /* Test vectorization of reduction of unsigned-int.  */
  13
  14 __attribute__ ((noinline))
  15 void main1 (unsigned int x, unsigned int max_result, unsigned int min_result)
  16 {
  17   int i;
  18   unsigned int udiff = 2;
  19   unsigned int umax = x;
  20   unsigned int umin = x;
  21
  22   /* Summation.  */
  23   for (i = 0; i < N; i++) {
  24     udiff += (ub[i] - uc[i]);
  25   }
  26
  27   /* Maximum.  */
  28   for (i = 0; i < N; i++) {
  29     umax = umax < uc[i] ? uc[i] : umax;
  30   }
  31
  32   /* Minimum.  */
  33   for (i = 0; i < N; i++) {
  34     umin = umin > uc[i] ? uc[i] : umin;
  35   }
  36
  37   /* check results:  */
  38   if (udiff != DIFF)
  39     abort ();
  40   if (umax != max_result)
  41     abort ();
  42   if (umin != min_result)
  43     abort ();
  44 }
  45
  46 int main (void)
  47 {
  48   check_vect ();
  49
  50   main1 (100, 100, 1);
  51   main1 (0, 15, 0);
  52   return 0;
  53 }
  54
  55 /* { dg-final { scan-tree-dump-times "vectorized 3 loops" 1 "vect" { xfail { vect_no_int_add || vect_no_int_min_max } } } } */