pr49038.c

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