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