gcc/testsuite/gcc.dg/vect/pr79824-2.c

   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     {
  25       a[n] = b[n * 4] + b[n * 4 + 1];
  26     }
  27 }
  28
  29 int
  30 main (void)
  31 {
  32   void *x;
  33   size_t b_offset;
  34
  35   check_vect ();
  36
  37   x = mmap ((void *) ADDRESS, MMAP_SIZE, PROT_READ | PROT_WRITE,
  38             MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  39   if (x == MAP_FAILED)
  40     {
  41       perror ("mmap");
  42       return 1;
  43     }
  44
  45   b_offset = MMAP_SIZE - (4 * COUNT - 2) * sizeof (TYPE);
  46   foo ((TYPE *) x, (TYPE *) ((char *) x + b_offset));
  47   return 0;
  48 }