1  /* { dg-require-effective-target mmap } */
       2  
       3  #include <sys/mman.h>
       4  #include <stdio.h>
       5  #include "tree-vect.h"
       6  
       7  #define COUNT 320
       8  #define MMAP_SIZE 0x10000
       9  #define ADDRESS 0x1122000000
      10  #define TYPE double
      11  
      12  #ifndef MAP_ANONYMOUS
      13  #define MAP_ANONYMOUS MAP_ANON
      14  #endif
      15  
      16  void __attribute__((noinline))
      17  foo (TYPE *__restrict a, TYPE *__restrict b)
      18  {
      19    int n;
      20  
      21    b = __builtin_assume_aligned (b, sizeof (TYPE) * 2);
      22    a = __builtin_assume_aligned (a, sizeof (TYPE) * 2);
      23    for (n = 0; n < COUNT; n++)
      24      a[n] = b[n * 4];
      25  }
      26  
      27  int
      28  main (void)
      29  {
      30    void *x;
      31    size_t b_offset;
      32  
      33    check_vect ();
      34  
      35    x = mmap ((void *) ADDRESS, MMAP_SIZE, PROT_READ | PROT_WRITE,
      36  	    MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
      37    if (x == MAP_FAILED)
      38      {
      39        perror ("mmap");
      40        return 1;
      41      }
      42  
      43    b_offset = MMAP_SIZE - (4 * COUNT - 2) * sizeof (TYPE);
      44    foo ((TYPE *) x, (TYPE *) ((char *) x + b_offset));
      45    return 0;
      46  }