gcc/testsuite/gcc.dg/vect/vect-5.c

   1 /* { dg-require-effective-target vect_float } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 16
   7
   8 int main1 ()
   9 {
  10   int i, j;
  11   float a[N];
  12   float c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
  13   float d[N] = {0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30};
  14
  15   i = 0;
  16   j = 0;
  17   while (i < 5*N)
  18     {
  19       a[j] = c[j];
  20       i += 5;
  21       j++;
  22     }
  23
  24   /* check results:  */
  25   for (i = 0; i <N; i++)
  26     {
  27       if (a[i] != c[i])
  28         abort ();
  29     }
  30
  31
  32   for (i = N; i > 0; i--)
  33     {
  34       a[N-i] = d[N-i];
  35     }
  36
  37   /* check results:  */
  38   for (i = 0; i < N; i++)
  39     {
  40       if (a[i] != d[i])
  41         abort ();
  42     }
  43
  44   return 0;
  45 }
  46
  47 int main (void)
  48 {
  49   check_vect ();
  50
  51   return main1 ();
  52 }
  53
  54 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
  55 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 0 "vect" } } */