1 // RUN: %libomptarget-compile-run-and-check-generic
2
3 // REQUIRES: unified_shared_memory
4
5 #include <omp.h>
6 #include <stdio.h>
7
8 // ---------------------------------------------------------------------------
9 // Various definitions copied from OpenMP RTL
10
11 extern void __tgt_register_requires(int64_t);
12
13 extern void __tgt_target_data_begin(int64_t device_id, int32_t arg_num,
14 void **args_base, void **args,
15 int64_t *arg_sizes, int64_t *arg_types);
16
17 extern void __tgt_target_data_end(int64_t device_id, int32_t arg_num,
18 void **args_base, void **args,
19 int64_t *arg_sizes, int64_t *arg_types);
20
21 // End of definitions copied from OpenMP RTL.
22 // ---------------------------------------------------------------------------
23
24 #pragma omp requires unified_shared_memory
25
26 #define N 1024
27
main(int argc,char * argv[])28 int main(int argc, char *argv[]) {
29 int fails;
30 void *host_alloc = 0, *device_alloc = 0;
31 int *a = (int *)malloc(N * sizeof(int));
32
33 // Manual registration of requires flags for Clang versions
34 // that do not support requires.
35 __tgt_register_requires(8);
36
37 // Init
38 for (int i = 0; i < N; ++i) {
39 a[i] = 10;
40 }
41 host_alloc = &a[0];
42
43 // Dummy target region that ensures the runtime library is loaded when
44 // the target data begin/end functions are manually called below.
45 #pragma omp target
46 {}
47
48 // Manual calls
49 int device_id = omp_get_default_device();
50 int arg_num = 1;
51 void **args_base = (void **)&a;
52 void **args = (void **)&a;
53 int64_t arg_sizes[arg_num];
54
55 arg_sizes[0] = sizeof(int) * N;
56
57 int64_t arg_types[arg_num];
58
59 // Ox400 enables the CLOSE map type in the runtime:
60 // OMP_TGT_MAPTYPE_CLOSE = 0x400
61 // OMP_TGT_MAPTYPE_TO = 0x001
62 arg_types[0] = 0x400 | 0x001;
63
64 device_alloc = host_alloc;
65
66 __tgt_target_data_begin(device_id, arg_num, args_base, args, arg_sizes,
67 arg_types);
68
69 #pragma omp target data use_device_ptr(a)
70 { device_alloc = a; }
71
72 __tgt_target_data_end(device_id, arg_num, args_base, args, arg_sizes,
73 arg_types);
74
75 // CHECK: a was copied to the device
76 if (device_alloc != host_alloc)
77 printf("a was copied to the device\n");
78
79 free(a);
80
81 // CHECK: Done!
82 printf("Done!\n");
83
84 return 0;
85 }
86