1 /* Test that __builtin_prefetch does no harm.
2
3 Prefetch using all valid combinations of rw and locality values.
4 These must be compile-time constants. */
5
6 #define NO_TEMPORAL_LOCALITY 0
7 #define LOW_TEMPORAL_LOCALITY 1
8 #define MODERATE_TEMPORAL_LOCALITY 1
9 #define HIGH_TEMPORAL_LOCALITY 3
10
11 #define WRITE_ACCESS 1
12 #define READ_ACCESS 0
13
14 enum locality { none, low, moderate, high };
15 enum rw { read, write };
16
17 int arr[10];
18
19 void
good_const(const int * p)20 good_const (const int *p)
21 {
22 __builtin_prefetch (p, 0, 0);
23 __builtin_prefetch (p, 0, 1);
24 __builtin_prefetch (p, 0, 2);
25 __builtin_prefetch (p, READ_ACCESS, 3);
26 __builtin_prefetch (p, 1, NO_TEMPORAL_LOCALITY);
27 __builtin_prefetch (p, 1, LOW_TEMPORAL_LOCALITY);
28 __builtin_prefetch (p, 1, MODERATE_TEMPORAL_LOCALITY);
29 __builtin_prefetch (p, WRITE_ACCESS, HIGH_TEMPORAL_LOCALITY);
30 }
31
32 void
good_enum(const int * p)33 good_enum (const int *p)
34 {
35 __builtin_prefetch (p, read, none);
36 __builtin_prefetch (p, read, low);
37 __builtin_prefetch (p, read, moderate);
38 __builtin_prefetch (p, read, high);
39 __builtin_prefetch (p, write, none);
40 __builtin_prefetch (p, write, low);
41 __builtin_prefetch (p, write, moderate);
42 __builtin_prefetch (p, write, high);
43 }
44
45 void
good_expr(const int * p)46 good_expr (const int *p)
47 {
48 __builtin_prefetch (p, 1 - 1, 6 - (2 * 3));
49 __builtin_prefetch (p, 1 + 0, 1 + 2);
50 }
51
52 void
good_vararg(const int * p)53 good_vararg (const int *p)
54 {
55 __builtin_prefetch (p, 0, 3);
56 __builtin_prefetch (p, 0);
57 __builtin_prefetch (p, 1);
58 __builtin_prefetch (p);
59 }
60
61 int
main()62 main ()
63 {
64 good_const (arr);
65 good_enum (arr);
66 good_expr (arr);
67 good_vararg (arr);
68 exit (0);
69 }
70