llvm-project/clang/test/SemaCUDA/reference-to-kernel-fn.cu

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// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify \
// RUN: -verify-ignore-unexpected=note %s
// RUN: %clang_cc1 -std=c++11 -fcuda-is-device -fsyntax-only -verify \
// RUN: -verify-ignore-unexpected=note -DDEVICE %s
// Check that we can reference (get a function pointer to) a __global__
// function from the host side, but not the device side. (We don't yet support
// device-side kernel launches.)
#include "Inputs/cuda.h"
struct Dummy {};
__global__ void kernel() {}
typedef void (*fn_ptr_t)();
__host__ __device__ fn_ptr_t get_ptr_hd() {
return kernel;
#ifdef DEVICE
// expected-error@-2 {{reference to __global__ function}}
#endif
}
__host__ fn_ptr_t get_ptr_h() {
return kernel;
}
__device__ fn_ptr_t get_ptr_d() {
return kernel; // expected-error {{reference to __global__ function}}
}