gcc/testsuite/gcc.dg/vect/vect-reduc-1char-big-array.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 256
   7
   8 unsigned char ub[N];
   9 unsigned char uc[N];
  10 unsigned char diff;
  11
  12 volatile int y = 0;
  13
  14 __attribute__ ((noinline)) void
  15 main1 (unsigned char x, unsigned char max_result, unsigned char min_result)
  16 {
  17   int i;
  18   unsigned char udiff = 2;
  19   unsigned char umax = x;
  20   unsigned char umin = x;
  21
  22   diff = 2;
  23   for (i = 0; i < N; i++) {
  24     ub[i] = i;
  25     uc[i] = i;
  26     if (i%16 == 0)
  27       {
  28         ub[i] = i+2;
  29         diff += 2;
  30       }
  31     if (uc[i] > max_result)
  32       max_result = uc[i];
  33     if (uc[i] < min_result)
  34       min_result = uc[i];
  35
  36     /* Avoid vectorization.  */
  37     if (y)
  38       abort ();
  39   }
  40   for (i = 0; i < N; i++) {
  41     udiff += (unsigned char) (ub[i] - uc[i]);
  42   }
  43
  44   for (i = 0; i < N; i++) {
  45     umax = umax < uc[i] ? uc[i] : umax;
  46   }
  47
  48   for (i = 0; i < N; i++) {
  49     umin = umin > uc[i] ? uc[i] : umin;
  50   }
  51
  52   /* check results:  */
  53   if (udiff != diff)
  54     abort ();
  55   if (umax != max_result)
  56     abort ();
  57   if (umin != min_result)
  58     abort ();
  59 }
  60
  61 int main (void)
  62 {
  63   check_vect ();
  64
  65   main1 (100, 100, 1);
  66   main1 (0, 15, 0);
  67   return 0;
  68 }
  69
  70 /* { dg-final { scan-tree-dump-times "vectorized 3 loops" 1 "vect" { xfail vect_no_int_min_max } } } */