| // RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-linux-gnu -fsyntax-only -verify %s |
| // RUN: %clang_cc1 -std=c++11 -triple nvptx64-nvidia-cuda -fsyntax-only -fcuda-is-device -verify %s |
| |
| #include "Inputs/cuda.h" |
| |
| struct HType {}; // expected-note-re 6 {{candidate constructor {{.*}} not viable: no known conversion from 'DType'}} |
| struct DType {}; // expected-note-re 6 {{candidate constructor {{.*}} not viable: no known conversion from 'HType'}} |
| struct HDType {}; |
| |
| template <typename T> __host__ HType overload_h_d(T a) { return HType(); } |
| // expected-note@-1 2 {{candidate template ignored: could not match 'HType' against 'DType'}} |
| // expected-note@-2 2 {{candidate template ignored: target attributes do not match}} |
| template <typename T> __device__ DType overload_h_d(T a) { return DType(); } |
| // expected-note@-1 2 {{candidate template ignored: could not match 'DType' against 'HType'}} |
| // expected-note@-2 2 {{candidate template ignored: target attributes do not match}} |
| |
| // Check explicit instantiation. |
| template __device__ __host__ DType overload_h_d(int a); // There's no HD template... |
| // expected-error@-1 {{explicit instantiation of 'overload_h_d' does not refer to a function template, variable template, member function, member class, or static data member}} |
| template __device__ __host__ HType overload_h_d(int a); // There's no HD template... |
| // expected-error@-1 {{explicit instantiation of 'overload_h_d' does not refer to a function template, variable template, member function, member class, or static data member}} |
| template __device__ DType overload_h_d(int a); // OK. instantiates D |
| template __host__ HType overload_h_d(int a); // OK. instantiates H |
| |
| // Check explicit specialization. |
| template <> __device__ __host__ DType overload_h_d(long a); // There's no HD template... |
| // expected-error@-1 {{no function template matches function template specialization 'overload_h_d'}} |
| template <> __device__ __host__ HType overload_h_d(long a); // There's no HD template... |
| // expected-error@-1 {{no function template matches function template specialization 'overload_h_d'}} |
| template <> __device__ DType overload_h_d(long a); // OK. instantiates D |
| template <> __host__ HType overload_h_d(long a); // OK. instantiates H |
| |
| |
| // Can't overload HD template with H or D template, though |
| // non-template functions are OK. |
| template <typename T> __host__ __device__ HDType overload_hd(T a) { return HDType(); } |
| // expected-note@-1 {{previous declaration is here}} |
| // expected-note@-2 2 {{candidate template ignored: could not match 'HDType' against 'HType'}} |
| template <typename T> __device__ HDType overload_hd(T a); |
| // expected-error@-1 {{__device__ function 'overload_hd' cannot overload __host__ __device__ function 'overload_hd'}} |
| __device__ HDType overload_hd(int a); // OK. |
| |
| // Verify that target attributes are taken into account when we |
| // explicitly specialize or instantiate function tempaltes. |
| template <> __host__ HType overload_hd(int a); |
| // expected-error@-1 {{no function template matches function template specialization 'overload_hd'}} |
| template __host__ HType overload_hd(long a); |
| // expected-error@-1 {{explicit instantiation of 'overload_hd' does not refer to a function template, variable template, member function, member class, or static data member}} |
| __host__ HType overload_hd(int a); // OK |
| |
| template <typename T> __host__ T overload_h(T a); // expected-note {{previous declaration is here}} |
| template <typename T> __host__ __device__ T overload_h(T a); |
| // expected-error@-1 {{__host__ __device__ function 'overload_h' cannot overload __host__ function 'overload_h'}} |
| template <typename T> __device__ T overload_h(T a); // OK. D can overload H. |
| |
| template <typename T> __host__ HType overload_h_d2(T a) { return HType(); } |
| template <typename T> __host__ __device__ HDType overload_h_d2(T a) { return HDType(); } |
| template <typename T1, typename T2 = int> __device__ DType overload_h_d2(T1 a) { T1 x; T2 y; return DType(); } |
| |
| // constexpr functions are implicitly HD, but explicit |
| // instantiation/specialization must use target attributes as written. |
| template <typename T> constexpr T overload_ce_implicit_hd(T a) { return a+1; } |
| // expected-note@-1 3 {{candidate template ignored: target attributes do not match}} |
| |
| // These will not match the template. |
| template __host__ __device__ int overload_ce_implicit_hd(int a); |
| // expected-error@-1 {{explicit instantiation of 'overload_ce_implicit_hd' does not refer to a function template, variable template, member function, member class, or static data member}} |
| template <> __host__ __device__ long overload_ce_implicit_hd(long a); |
| // expected-error@-1 {{no function template matches function template specialization 'overload_ce_implicit_hd'}} |
| template <> __host__ __device__ constexpr long overload_ce_implicit_hd(long a); |
| // expected-error@-1 {{no function template matches function template specialization 'overload_ce_implicit_hd'}} |
| |
| // These should work, because template matching ignores the implicit |
| // HD attributes the compiler gives to constexpr functions/templates, |
| // so 'overload_ce_implicit_hd' template will match __host__ functions |
| // only. |
| template __host__ int overload_ce_implicit_hd(int a); |
| template <> __host__ long overload_ce_implicit_hd(long a); |
| |
| template float overload_ce_implicit_hd(float a); |
| template <> float* overload_ce_implicit_hd(float *a); |
| template <> constexpr double overload_ce_implicit_hd(double a) { return a + 3.0; }; |
| |
| __host__ void hf() { |
| overload_hd(13); |
| overload_ce_implicit_hd('h'); // Implicitly instantiated |
| overload_ce_implicit_hd(1.0f); // Explicitly instantiated |
| overload_ce_implicit_hd(2.0); // Explicitly specialized |
| |
| HType h = overload_h_d(10); |
| HType h2i = overload_h_d2<int>(11); |
| HType h2ii = overload_h_d2<int>(12); |
| |
| // These should be implicitly instantiated from __host__ template returning HType. |
| DType d = overload_h_d(20); // expected-error {{no viable conversion from 'HType' to 'DType'}} |
| DType d2i = overload_h_d2<int>(21); // expected-error {{no viable conversion from 'HType' to 'DType'}} |
| DType d2ii = overload_h_d2<int>(22); // expected-error {{no viable conversion from 'HType' to 'DType'}} |
| } |
| __device__ void df() { |
| overload_hd(23); |
| overload_ce_implicit_hd('d'); // Implicitly instantiated |
| overload_ce_implicit_hd(1.0f); // Explicitly instantiated |
| overload_ce_implicit_hd(2.0); // Explicitly specialized |
| |
| // These should be implicitly instantiated from __device__ template returning DType. |
| HType h = overload_h_d(10); // expected-error {{no viable conversion from 'DType' to 'HType'}} |
| HType h2i = overload_h_d2<int>(11); // expected-error {{no viable conversion from 'DType' to 'HType'}} |
| HType h2ii = overload_h_d2<int>(12); // expected-error {{no viable conversion from 'DType' to 'HType'}} |
| |
| DType d = overload_h_d(20); |
| DType d2i = overload_h_d2<int>(21); |
| DType d2ii = overload_h_d2<int>(22); |
| } |