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