| 1 | // RUN: %libomptarget-compile-run-and-check-generic |
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| 2 | |
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| 3 | // REQUIRES: unified_shared_memory |
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| 4 | // UNSUPPORTED: clang-6, clang-7, clang-8, clang-9 |
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| 5 | |
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| 6 | #include <omp.h> |
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| 7 | #include <stdio.h> |
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| 8 | |
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| 9 | #pragma omp requires unified_shared_memory |
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| 10 | |
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| 11 | struct S { |
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| 12 | int x; |
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| 13 | int y; |
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| 14 | }; |
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| 15 | |
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| 16 | int main(int argc, char *argv[]) { |
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| 17 | int dev = omp_get_default_device(); |
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| 18 | struct S s = {10, 20}; |
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| 19 | |
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| 20 | #pragma omp target enter data map(close, to : s) |
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| 21 | #pragma omp target map(alloc : s) |
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| 22 | { |
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| 23 | s.x = 11; |
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| 24 | s.y = 21; |
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| 25 | } |
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| 26 | // To determine whether x needs to be transferred or deleted, the runtime |
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| 27 | // cannot simply check whether unified shared memory is enabled and the |
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| 28 | // 'close' modifier is specified. It must check whether x was previously |
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| 29 | // placed in device memory by, for example, a 'close' modifier that isn't |
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| 30 | // specified here. The following struct member case checks a special code |
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| 31 | // path in the runtime implementation where members are transferred before |
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| 32 | // deletion of the struct. |
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| 33 | #pragma omp target exit data map(from : s.x, s.y) |
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| 34 | |
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| 35 | // CHECK: s.x=11, s.y=21 |
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| 36 | printf(format: "s.x=%d, s.y=%d\n" , s.x, s.y); |
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| 37 | // CHECK: present: 0 |
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| 38 | printf(format: "present: %d\n" , omp_target_is_present(&s, dev)); |
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| 39 | |
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| 40 | return 0; |
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| 41 | } |
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| 42 | |
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