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// RUN: %clang_cc1 -fsyntax-only -verify %s
// Check that it's OK for kernels to call HD functions that call device-only
// functions.
#include "Inputs/cuda.h"
__device__ void device_fn(int) {}
// expected-note@-1 2 {{declared here}}
inline __host__ __device__ int hd1() {
device_fn(0); // expected-error {{reference to __device__ function}}
return 0;
}
inline __host__ __device__ int hd2() {
// No error here because hd2 is only referenced from a kernel.
device_fn(0);
return 0;
}
inline __host__ __device__ void hd3(int) {
device_fn(0); // expected-error {{reference to __device__ function 'device_fn'}}
}
inline __host__ __device__ void hd3(double) {}
inline __host__ __device__ void hd4(int) {}
inline __host__ __device__ void hd4(double) {
device_fn(0); // No error; this function is never called.
}
__global__ void kernel(int) { hd2(); }
template <typename T>
void launch_kernel() {
kernel<<<0, 0>>>(T());
// Notice that these two diagnostics are different: Because the call to hd1
// is not dependent on T, the call to hd1 comes from 'launch_kernel', while
// the call to hd3, being dependent, comes from 'launch_kernel<int>'.
hd1(); // expected-note {{called by 'launch_kernel'}}
hd3(T()); // expected-note {{called by 'launch_kernel<int>'}}
}
void host_fn() {
launch_kernel<int>();
// expected-note@-1 2 {{called by 'host_fn'}}
}
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