forked from OSchip/llvm-project
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
// RUN: %libomptarget-compile-run-and-check-generic
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// REQUIRES: unified_shared_memory
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#include <omp.h>
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#include <stdio.h>
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// ---------------------------------------------------------------------------
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// Various definitions copied from OpenMP RTL
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extern void __tgt_register_requires(int64_t);
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extern void __tgt_target_data_begin(int64_t device_id, int32_t arg_num,
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void **args_base, void **args,
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int64_t *arg_sizes, int64_t *arg_types);
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extern void __tgt_target_data_end(int64_t device_id, int32_t arg_num,
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void **args_base, void **args,
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int64_t *arg_sizes, int64_t *arg_types);
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// End of definitions copied from OpenMP RTL.
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// ---------------------------------------------------------------------------
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#pragma omp requires unified_shared_memory
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#define N 1024
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int main(int argc, char *argv[]) {
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int fails;
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void *host_alloc = 0, *device_alloc = 0;
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int *a = (int *)malloc(N * sizeof(int));
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// Manual registration of requires flags for Clang versions
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// that do not support requires.
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__tgt_register_requires(8);
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// Init
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for (int i = 0; i < N; ++i) {
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a[i] = 10;
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}
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host_alloc = &a[0];
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// Dummy target region that ensures the runtime library is loaded when
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// the target data begin/end functions are manually called below.
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#pragma omp target
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{}
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// Manual calls
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int device_id = omp_get_default_device();
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int arg_num = 1;
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void **args_base = (void **)&a;
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void **args = (void **)&a;
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int64_t arg_sizes[arg_num];
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arg_sizes[0] = sizeof(int) * N;
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int64_t arg_types[arg_num];
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// Ox400 enables the CLOSE map type in the runtime:
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// OMP_TGT_MAPTYPE_CLOSE = 0x400
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// OMP_TGT_MAPTYPE_TO = 0x001
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arg_types[0] = 0x400 | 0x001;
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device_alloc = host_alloc;
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__tgt_target_data_begin(device_id, arg_num, args_base, args, arg_sizes,
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arg_types);
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#pragma omp target data use_device_ptr(a)
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{ device_alloc = a; }
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__tgt_target_data_end(device_id, arg_num, args_base, args, arg_sizes,
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arg_types);
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// CHECK: a was copied to the device
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if (device_alloc != host_alloc)
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printf("a was copied to the device\n");
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free(a);
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// CHECK: Done!
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printf("Done!\n");
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return 0;
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}
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