gcc/testsuite/gcc.dg/vect/vect-reduc-2char-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 __attribute__ ((noinline))
   9 void main1 (signed char x, signed char max_result, signed char min_result)
  10 {
  11   int i;
  12   signed char b[N];
  13   signed char c[N];
  14   signed char check_diff = 2;
  15   signed char diff = 2;
  16   signed char max = x;
  17   signed char min = x;
  18
  19   check_diff = 2;
  20   for (i = 0; i < N; i++) {
  21     b[i] = i;
  22     c[i] = i;
  23     if (i%16 == 0)
  24       {
  25         c[i] = i + 1;
  26         check_diff += 1;
  27       }
  28     if (c[i] > max_result)
  29       max_result = c[i];
  30     if (c[i] < min_result)
  31       min_result = c[i];
  32     asm volatile ("" ::: "memory");
  33   }
  34
  35   for (i = 0; i < N; i++) {
  36     diff += (signed char) (c[i] - b[i]);
  37   }
  38
  39   for (i = 0; i < N; i++) {
  40     max = max < c[i] ? c[i] : max;
  41   }
  42
  43   for (i = 0; i < N; i++) {
  44     min = min > c[i] ? c[i] : min;
  45   }
  46
  47   /* check results:  */
  48   if (diff != check_diff)
  49     abort ();
  50   if (max != max_result)
  51     abort ();
  52   if (min != min_result)
  53     abort ();
  54 }
  55
  56 int main (void)
  57 {
  58   check_vect ();
  59
  60   main1 (100, 100, 1);
  61   main1 (0, 15, 0);
  62   return 0;
  63 }
  64
  65 /* { dg-final { scan-tree-dump-times "vectorized 3 loops" 1 "vect" { target { ! vect_no_int_min_max } } } } */