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