gcc/testsuite/gcc.dg/vect/vect-106.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 static int a[N] = {1,2,3,4,5,6,7,8,9};
  10 static int b[N] = {2,3,4,5,6,7,8,9,0};
  11
  12 __attribute__ ((noinline))
  13 int main1 () {
  14   int i;
  15   int *p, *q, *p1, *q1;
  16   p = (unsigned int *) malloc (sizeof (unsigned int) * N);
  17   q = (unsigned int *) malloc (sizeof (unsigned int) * N);
  18
  19   p1 = p; q1 = q;
  20
  21   /* Vectorizable, before pointer plus we would get a redundant cast
  22      (caused by pointer arithmetics), alias analysis fails to distinguish
  23      between the pointers.  */
  24   for (i = 0; i < N; i++)
  25     {
  26       *(q + i) = a[i];
  27       *(p + i) = b[i];
  28     }
  29
  30   /* check results: */
  31   for (i = 0; i < N; i++)
  32     {
  33        if (*q != a[i] || *p != b[i])
  34          abort();
  35        q++;
  36        p++;
  37     }
  38
  39   q = q1;
  40   p = p1;
  41   /* Vectorizable.  */
  42   for (i = 0; i < N; i++)
  43     {
  44       *q = b[i];
  45       *p = a[i];
  46       q++;
  47       p++;
  48     }
  49
  50   q = q1;
  51   p = p1;
  52   /* check results: */
  53   for (i = 0; i < N; i++)
  54     {
  55        if (*q != b[i] || *p != a[i])
  56          abort();
  57        q++;
  58        p++;
  59     }
  60
  61   return 0;
  62 }
  63
  64 int main (void)
  65 {
  66   check_vect ();
  67
  68   return main1 ();
  69 }
  70
  71 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
  72 /* { dg-final { cleanup-tree-dump "vect" } } */
  73