gcc/testsuite/gcc.dg/vect/pr29145.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 void with_restrict(int * __restrict p)
   7 {
   8   int i;
   9   int *q = p - 2;
  10
  11   for (i = 0; i < 1000; ++i) {
  12     p[i] = q[i];
  13   }
  14 }
  15
  16 void without_restrict(int * p)
  17 {
  18   int i;
  19   int *q = p - 2;
  20
  21   for (i = 0; i < 1000; ++i) {
  22     p[i] = q[i];
  23   }
  24 }
  25
  26 int main(void)
  27 {
  28   int i;
  29   int a[1002];
  30   int b[1002];
  31
  32   for (i = 0; i < 1002; ++i) {
  33     a[i] = b[i] = i;
  34   }
  35
  36   with_restrict(a + 2);
  37   without_restrict(b + 2);
  38
  39   for (i = 0; i < 1002; ++i) {
  40     if (a[i] != b[i])
  41       abort();
  42   }
  43   return 0;
  44 }
  45
  46 /* { dg-final { scan-tree-dump-times "vectorized 0 loops" 2 "vect"  } } */
  47 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  } } */
  48 /* { dg-final { cleanup-tree-dump "vect" } } */