1 // Tests cudaMemcpy and writes from kernel
2 // RUN: cat %s | clang-repl --cuda | FileCheck %s
3
4 extern "C" int printf(const char*, ...);
5
test_func(int * value)6 __global__ void test_func(int* value) { *value = 42; }
7
8 int var;
9 int* devptr = nullptr;
10 printf("cudaMalloc: %d\n", cudaMalloc((void **) &devptr, sizeof(int)));
11 // CHECK: cudaMalloc: 0
12
13 test_func<<<1,1>>>(devptr);
14 printf("CUDA Error: %d\n", cudaGetLastError());
15 // CHECK-NEXT: CUDA Error: 0
16
17 printf("cudaMemcpy: %d\n", cudaMemcpy(&var, devptr, sizeof(int), cudaMemcpyDeviceToHost));
18 // CHECK-NEXT: cudaMemcpy: 0
19
20 printf("Value: %d\n", var);
21 // CHECK-NEXT: Value: 42
22
23 %quit
24