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