gnu/dist/gcc4/gcc/testsuite/gcc.dg/vect/vect-102.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdlib.h>
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N 9
   8
   9 struct extraction
  10 {
  11   int a[N];
  12   int b[N];
  13 };
  14
  15 static int a[N] = {1,2,3,4,5,6,7,8,9};
  16 static int b[N] = {2,3,4,5,6,7,8,9,9};
  17
  18 int main1 (int x, int y) {
  19   int i;
  20   struct extraction *p;
  21   p = (struct extraction *) malloc (sizeof (struct extraction));
  22
  23   for (i = 0; i < N; i++)
  24     {
  25        p->a[i] = a[i];
  26        if (x == 135)
  27          abort (); /* to avoid vectorization  */
  28     }
  29
  30   /* Not vectorizable: distance 1.  */
  31   for (i = 0; i < N - 1; i++)
  32     {
  33        *((int *)p + x + i) = *((int *)p + x + i + 1);
  34     }
  35
  36   /* check results: */
  37   for (i = 0; i < N; i++)
  38     {
  39        if (p->a[i] != b[i])
  40          abort();
  41     }
  42   return 0;
  43 }
  44
  45 int main (void)
  46 {
  47   check_vect ();
  48
  49   return main1 (0, N);
  50 }
  51
  52 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" } } */
  53 /* { dg-final { scan-tree-dump-times "possible dependence between data-refs" 1 "vect" } } */
  54 /* { dg-final { cleanup-tree-dump "vect" } } */
  55