1/* Test that __builtin_prefetch does no harm.
2
3   Prefetch data using a variety of storage classes and address
4   expressions with volatile variables and pointers.  */
5
6int glob_int_arr[100];
7int glob_int = 4;
8volatile int glob_vol_int_arr[100];
9int * volatile glob_vol_ptr_int = glob_int_arr;
10volatile int *glob_ptr_vol_int = glob_vol_int_arr;
11volatile int * volatile glob_vol_ptr_vol_int = glob_vol_int_arr;
12volatile int glob_vol_int;
13
14static stat_int_arr[100];
15static volatile int stat_vol_int_arr[100];
16static int * volatile stat_vol_ptr_int = stat_int_arr;
17static volatile int *stat_ptr_vol_int = stat_vol_int_arr;
18static volatile int * volatile stat_vol_ptr_vol_int = stat_vol_int_arr;
19static volatile int stat_vol_int;
20
21struct S {
22  int a;
23  short b, c;
24  char d[8];
25  struct S *next;
26};
27
28struct S str;
29volatile struct S vol_str;
30struct S * volatile vol_ptr_str = &str;
31volatile struct S *ptr_vol_str = &vol_str;
32volatile struct S * volatile vol_ptr_vol_str = &vol_str;
33
34/* Prefetch volatile global variables using the address of the variable.  */
35
36void
37simple_vol_global ()
38{
39  __builtin_prefetch (glob_vol_int_arr, 0, 0);
40  __builtin_prefetch (glob_vol_ptr_int, 0, 0);
41  __builtin_prefetch (glob_ptr_vol_int, 0, 0);
42  __builtin_prefetch (glob_vol_ptr_vol_int, 0, 0);
43  __builtin_prefetch (&glob_vol_int, 0, 0);
44}
45
46/* Prefetch volatile static variables using the address of the variable.  */
47
48void
49simple_vol_file ()
50{
51  __builtin_prefetch (stat_vol_int_arr, 0, 0);
52  __builtin_prefetch (stat_vol_ptr_int, 0, 0);
53  __builtin_prefetch (stat_ptr_vol_int, 0, 0);
54  __builtin_prefetch (stat_vol_ptr_vol_int, 0, 0);
55  __builtin_prefetch (&stat_vol_int, 0, 0);
56}
57
58/* Prefetch using address expressions involving volatile global variables.  */
59
60void
61expr_vol_global (void)
62{
63  __builtin_prefetch (&vol_str, 0, 0);
64  __builtin_prefetch (ptr_vol_str, 0, 0);
65  __builtin_prefetch (vol_ptr_str, 0, 0);
66  __builtin_prefetch (vol_ptr_vol_str, 0, 0);
67  __builtin_prefetch (&vol_str.b, 0, 0);
68  __builtin_prefetch (&ptr_vol_str->b, 0, 0);
69  __builtin_prefetch (&vol_ptr_str->b, 0, 0);
70  __builtin_prefetch (&vol_ptr_vol_str->b, 0, 0);
71  __builtin_prefetch (&vol_str.d, 0, 0);
72  __builtin_prefetch (&vol_ptr_str->d, 0, 0);
73  __builtin_prefetch (&ptr_vol_str->d, 0, 0);
74  __builtin_prefetch (&vol_ptr_vol_str->d, 0, 0);
75  __builtin_prefetch (vol_str.next, 0, 0);
76  __builtin_prefetch (vol_ptr_str->next, 0, 0);
77  __builtin_prefetch (ptr_vol_str->next, 0, 0);
78  __builtin_prefetch (vol_ptr_vol_str->next, 0, 0);
79  __builtin_prefetch (vol_str.next->d, 0, 0);
80  __builtin_prefetch (vol_ptr_str->next->d, 0, 0);
81  __builtin_prefetch (ptr_vol_str->next->d, 0, 0);
82  __builtin_prefetch (vol_ptr_vol_str->next->d, 0, 0);
83
84  __builtin_prefetch (&glob_vol_int_arr, 0, 0);
85  __builtin_prefetch (glob_vol_ptr_int, 0, 0);
86  __builtin_prefetch (glob_ptr_vol_int, 0, 0);
87  __builtin_prefetch (glob_vol_ptr_vol_int, 0, 0);
88  __builtin_prefetch (&glob_vol_int_arr[2], 0, 0);
89  __builtin_prefetch (&glob_vol_ptr_int[3], 0, 0);
90  __builtin_prefetch (&glob_ptr_vol_int[3], 0, 0);
91  __builtin_prefetch (&glob_vol_ptr_vol_int[3], 0, 0);
92  __builtin_prefetch (glob_vol_int_arr+3, 0, 0);
93  __builtin_prefetch (glob_vol_int_arr+glob_vol_int, 0, 0);
94  __builtin_prefetch (glob_vol_ptr_int+5, 0, 0);
95  __builtin_prefetch (glob_ptr_vol_int+5, 0, 0);
96  __builtin_prefetch (glob_vol_ptr_vol_int+5, 0, 0);
97  __builtin_prefetch (glob_vol_ptr_int+glob_vol_int, 0, 0);
98  __builtin_prefetch (glob_ptr_vol_int+glob_vol_int, 0, 0);
99  __builtin_prefetch (glob_vol_ptr_vol_int+glob_vol_int, 0, 0);
100}
101
102int
103main ()
104{
105  simple_vol_global ();
106  simple_vol_file ();
107
108  str.next = &str;
109  vol_str.next = &str;
110  expr_vol_global ();
111
112  exit (0);
113}
114