llvm-project/clang/test/SemaCUDA/call-device-fn-from-host.cu

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// RUN: %clang_cc1 %s --std=c++11 -triple x86_64-unknown-linux -emit-llvm -o - \
// RUN: -verify -verify-ignore-unexpected=note
// Note: This test won't work with -fsyntax-only, because some of these errors
// are emitted during codegen.
#include "Inputs/cuda.h"
__device__ void device_fn() {}
// expected-note@-1 5 {{'device_fn' declared here}}
struct S {
__device__ S() {}
// expected-note@-1 2 {{'S' declared here}}
__device__ ~S() { device_fn(); }
// expected-note@-1 {{'~S' declared here}}
int x;
};
struct T {
__host__ __device__ void hd() { device_fn(); }
// expected-error@-1 {{reference to __device__ function 'device_fn' in __host__ __device__ function}}
// No error; this is (implicitly) inline and is never called, so isn't
// codegen'ed.
__host__ __device__ void hd2() { device_fn(); }
__host__ __device__ void hd3();
__device__ void d() {}
// expected-note@-1 {{'d' declared here}}
};
__host__ __device__ void T::hd3() {
device_fn();
// expected-error@-1 {{reference to __device__ function 'device_fn' in __host__ __device__ function}}
}
template <typename T> __host__ __device__ void hd2() { device_fn(); }
// expected-error@-1 {{reference to __device__ function 'device_fn' in __host__ __device__ function}}
void host_fn() { hd2<int>(); }
__host__ __device__ void hd() { device_fn(); }
// expected-error@-1 {{reference to __device__ function 'device_fn' in __host__ __device__ function}}
// No error because this is never instantiated.
template <typename T> __host__ __device__ void hd3() { device_fn(); }
__host__ __device__ void local_var() {
S s;
// expected-error@-1 {{reference to __device__ function 'S' in __host__ __device__ function}}
}
__host__ __device__ void placement_new(char *ptr) {
::new(ptr) S();
// expected-error@-1 {{reference to __device__ function 'S' in __host__ __device__ function}}
}
__host__ __device__ void explicit_destructor(S *s) {
s->~S();
// expected-error@-1 {{reference to __device__ function '~S' in __host__ __device__ function}}
}
__host__ __device__ void hd_member_fn() {
T t;
// Necessary to trigger an error on T::hd. It's (implicitly) inline, so
// isn't codegen'ed until we call it.
t.hd();
}
__host__ __device__ void h_member_fn() {
T t;
t.d();
// expected-error@-1 {{reference to __device__ function 'd' in __host__ __device__ function}}
}
__host__ __device__ void fn_ptr() {
auto* ptr = &device_fn;
// expected-error@-1 {{reference to __device__ function 'device_fn' in __host__ __device__ function}}
}
template <typename T>
__host__ __device__ void fn_ptr_template() {
auto* ptr = &device_fn; // Not an error because the template isn't instantiated.
}
// Launching a kernel from a host function does not result in code generation
// for it, so calling HD function which calls a D function should not trigger
// errors.
static __host__ __device__ void hd_func() { device_fn(); }
__global__ void kernel() { hd_func(); }
void host_func(void) { kernel<<<1, 1>>>(); }