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382 lines
15 KiB
382 lines
15 KiB
// REQUIRES: x86-registered-target
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// REQUIRES: nvptx-registered-target
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fsyntax-only -verify %s
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// RUN: %clang_cc1 -triple nvptx64-nvidia-cuda -fsyntax-only -fcuda-is-device -verify %s
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#include "Inputs/cuda.h"
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// Opaque return types used to check that we pick the right overloads.
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struct HostReturnTy {};
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struct HostReturnTy2 {};
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struct DeviceReturnTy {};
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struct DeviceReturnTy2 {};
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struct HostDeviceReturnTy {};
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struct TemplateReturnTy {};
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typedef HostReturnTy (*HostFnPtr)();
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typedef DeviceReturnTy (*DeviceFnPtr)();
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typedef HostDeviceReturnTy (*HostDeviceFnPtr)();
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typedef void (*GlobalFnPtr)(); // __global__ functions must return void.
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// CurrentReturnTy is {HostReturnTy,DeviceReturnTy} during {host,device}
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// compilation.
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#ifdef __CUDA_ARCH__
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typedef DeviceReturnTy CurrentReturnTy;
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#else
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typedef HostReturnTy CurrentReturnTy;
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#endif
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// CurrentFnPtr is a function pointer to a {host,device} function during
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// {host,device} compilation.
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typedef CurrentReturnTy (*CurrentFnPtr)();
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// Host and unattributed functions can't be overloaded.
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__host__ void hh() {} // expected-note {{previous definition is here}}
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void hh() {} // expected-error {{redefinition of 'hh'}}
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// H/D overloading is OK.
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__host__ HostReturnTy dh() { return HostReturnTy(); }
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__device__ DeviceReturnTy dh() { return DeviceReturnTy(); }
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// H/HD and D/HD are not allowed.
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__host__ __device__ int hdh() { return 0; } // expected-note {{previous definition is here}}
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__host__ int hdh() { return 0; } // expected-error {{redefinition of 'hdh'}}
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__host__ int hhd() { return 0; } // expected-note {{previous definition is here}}
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__host__ __device__ int hhd() { return 0; } // expected-error {{redefinition of 'hhd'}}
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// expected-warning@-1 {{attribute declaration must precede definition}}
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// expected-note@-3 {{previous definition is here}}
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__host__ __device__ int hdd() { return 0; } // expected-note {{previous definition is here}}
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__device__ int hdd() { return 0; } // expected-error {{redefinition of 'hdd'}}
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__device__ int dhd() { return 0; } // expected-note {{previous definition is here}}
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__host__ __device__ int dhd() { return 0; } // expected-error {{redefinition of 'dhd'}}
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// expected-warning@-1 {{attribute declaration must precede definition}}
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// expected-note@-3 {{previous definition is here}}
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// Same tests for extern "C" functions.
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extern "C" __host__ int chh() { return 0; } // expected-note {{previous definition is here}}
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extern "C" int chh() { return 0; } // expected-error {{redefinition of 'chh'}}
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// H/D overloading is OK.
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extern "C" __device__ DeviceReturnTy cdh() { return DeviceReturnTy(); }
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extern "C" __host__ HostReturnTy cdh() { return HostReturnTy(); }
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// H/HD and D/HD overloading is not allowed.
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extern "C" __host__ __device__ int chhd1() { return 0; } // expected-note {{previous definition is here}}
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extern "C" __host__ int chhd1() { return 0; } // expected-error {{redefinition of 'chhd1'}}
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extern "C" __host__ int chhd2() { return 0; } // expected-note {{previous definition is here}}
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extern "C" __host__ __device__ int chhd2() { return 0; } // expected-error {{redefinition of 'chhd2'}}
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// expected-warning@-1 {{attribute declaration must precede definition}}
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// expected-note@-3 {{previous definition is here}}
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// Helper functions to verify calling restrictions.
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__device__ DeviceReturnTy d() { return DeviceReturnTy(); }
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// expected-note@-1 1+ {{'d' declared here}}
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// expected-note@-2 1+ {{candidate function not viable: call to __device__ function from __host__ function}}
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// expected-note@-3 0+ {{candidate function not viable: call to __device__ function from __host__ __device__ function}}
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__host__ HostReturnTy h() { return HostReturnTy(); }
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// expected-note@-1 1+ {{'h' declared here}}
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// expected-note@-2 1+ {{candidate function not viable: call to __host__ function from __device__ function}}
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// expected-note@-3 0+ {{candidate function not viable: call to __host__ function from __host__ __device__ function}}
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// expected-note@-4 1+ {{candidate function not viable: call to __host__ function from __global__ function}}
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__global__ void g() {}
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// expected-note@-1 1+ {{'g' declared here}}
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// expected-note@-2 1+ {{candidate function not viable: call to __global__ function from __device__ function}}
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// expected-note@-3 0+ {{candidate function not viable: call to __global__ function from __host__ __device__ function}}
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// expected-note@-4 1+ {{candidate function not viable: call to __global__ function from __global__ function}}
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extern "C" __device__ DeviceReturnTy cd() { return DeviceReturnTy(); }
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// expected-note@-1 1+ {{'cd' declared here}}
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// expected-note@-2 1+ {{candidate function not viable: call to __device__ function from __host__ function}}
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// expected-note@-3 0+ {{candidate function not viable: call to __device__ function from __host__ __device__ function}}
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extern "C" __host__ HostReturnTy ch() { return HostReturnTy(); }
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// expected-note@-1 1+ {{'ch' declared here}}
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// expected-note@-2 1+ {{candidate function not viable: call to __host__ function from __device__ function}}
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// expected-note@-3 0+ {{candidate function not viable: call to __host__ function from __host__ __device__ function}}
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// expected-note@-4 1+ {{candidate function not viable: call to __host__ function from __global__ function}}
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__host__ void hostf() {
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DeviceFnPtr fp_d = d; // expected-error {{reference to __device__ function 'd' in __host__ function}}
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DeviceReturnTy ret_d = d(); // expected-error {{no matching function for call to 'd'}}
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DeviceFnPtr fp_cd = cd; // expected-error {{reference to __device__ function 'cd' in __host__ function}}
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DeviceReturnTy ret_cd = cd(); // expected-error {{no matching function for call to 'cd'}}
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HostFnPtr fp_h = h;
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HostReturnTy ret_h = h();
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HostFnPtr fp_ch = ch;
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HostReturnTy ret_ch = ch();
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HostFnPtr fp_dh = dh;
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HostReturnTy ret_dh = dh();
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HostFnPtr fp_cdh = cdh;
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HostReturnTy ret_cdh = cdh();
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GlobalFnPtr fp_g = g;
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g(); // expected-error {{call to global function g not configured}}
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g<<<0, 0>>>();
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}
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__device__ void devicef() {
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DeviceFnPtr fp_d = d;
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DeviceReturnTy ret_d = d();
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DeviceFnPtr fp_cd = cd;
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DeviceReturnTy ret_cd = cd();
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HostFnPtr fp_h = h; // expected-error {{reference to __host__ function 'h' in __device__ function}}
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HostReturnTy ret_h = h(); // expected-error {{no matching function for call to 'h'}}
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HostFnPtr fp_ch = ch; // expected-error {{reference to __host__ function 'ch' in __device__ function}}
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HostReturnTy ret_ch = ch(); // expected-error {{no matching function for call to 'ch'}}
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DeviceFnPtr fp_dh = dh;
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DeviceReturnTy ret_dh = dh();
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DeviceFnPtr fp_cdh = cdh;
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DeviceReturnTy ret_cdh = cdh();
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GlobalFnPtr fp_g = g; // expected-error {{reference to __global__ function 'g' in __device__ function}}
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g(); // expected-error {{no matching function for call to 'g'}}
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g<<<0,0>>>(); // expected-error {{reference to __global__ function 'g' in __device__ function}}
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}
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__global__ void globalf() {
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DeviceFnPtr fp_d = d;
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DeviceReturnTy ret_d = d();
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DeviceFnPtr fp_cd = cd;
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DeviceReturnTy ret_cd = cd();
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HostFnPtr fp_h = h; // expected-error {{reference to __host__ function 'h' in __global__ function}}
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HostReturnTy ret_h = h(); // expected-error {{no matching function for call to 'h'}}
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HostFnPtr fp_ch = ch; // expected-error {{reference to __host__ function 'ch' in __global__ function}}
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HostReturnTy ret_ch = ch(); // expected-error {{no matching function for call to 'ch'}}
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DeviceFnPtr fp_dh = dh;
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DeviceReturnTy ret_dh = dh();
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DeviceFnPtr fp_cdh = cdh;
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DeviceReturnTy ret_cdh = cdh();
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GlobalFnPtr fp_g = g; // expected-error {{reference to __global__ function 'g' in __global__ function}}
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g(); // expected-error {{no matching function for call to 'g'}}
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g<<<0,0>>>(); // expected-error {{reference to __global__ function 'g' in __global__ function}}
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}
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__host__ __device__ void hostdevicef() {
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DeviceFnPtr fp_d = d;
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DeviceReturnTy ret_d = d();
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DeviceFnPtr fp_cd = cd;
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DeviceReturnTy ret_cd = cd();
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HostFnPtr fp_h = h;
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HostReturnTy ret_h = h();
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HostFnPtr fp_ch = ch;
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HostReturnTy ret_ch = ch();
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CurrentFnPtr fp_dh = dh;
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CurrentReturnTy ret_dh = dh();
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CurrentFnPtr fp_cdh = cdh;
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CurrentReturnTy ret_cdh = cdh();
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GlobalFnPtr fp_g = g;
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#if defined(__CUDA_ARCH__)
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// expected-error@-2 {{reference to __global__ function 'g' in __host__ __device__ function}}
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#endif
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g();
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g<<<0,0>>>();
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#if !defined(__CUDA_ARCH__)
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// expected-error@-3 {{call to global function g not configured}}
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#else
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// expected-error@-5 {{no matching function for call to 'g'}}
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// expected-error@-5 {{reference to __global__ function 'g' in __host__ __device__ function}}
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#endif // __CUDA_ARCH__
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}
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// Test for address of overloaded function resolution in the global context.
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HostFnPtr fp_h = h;
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HostFnPtr fp_ch = ch;
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CurrentFnPtr fp_dh = dh;
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CurrentFnPtr fp_cdh = cdh;
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GlobalFnPtr fp_g = g;
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// Test overloading of destructors
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// Can't mix H and unattributed destructors
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struct d_h {
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~d_h() {} // expected-note {{previous declaration is here}}
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__host__ ~d_h() {} // expected-error {{destructor cannot be redeclared}}
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};
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// H/D overloading is OK
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struct d_dh {
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__device__ ~d_dh() {}
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__host__ ~d_dh() {}
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};
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// HD is OK
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struct d_hd {
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__host__ __device__ ~d_hd() {}
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};
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// Mixing H/D and HD is not allowed.
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struct d_dhhd {
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__device__ ~d_dhhd() {}
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__host__ ~d_dhhd() {} // expected-note {{previous declaration is here}}
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__host__ __device__ ~d_dhhd() {} // expected-error {{destructor cannot be redeclared}}
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};
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struct d_hhd {
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__host__ ~d_hhd() {} // expected-note {{previous declaration is here}}
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__host__ __device__ ~d_hhd() {} // expected-error {{destructor cannot be redeclared}}
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};
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struct d_hdh {
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__host__ __device__ ~d_hdh() {} // expected-note {{previous declaration is here}}
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__host__ ~d_hdh() {} // expected-error {{destructor cannot be redeclared}}
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};
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struct d_dhd {
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__device__ ~d_dhd() {} // expected-note {{previous declaration is here}}
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__host__ __device__ ~d_dhd() {} // expected-error {{destructor cannot be redeclared}}
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};
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struct d_hdd {
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__host__ __device__ ~d_hdd() {} // expected-note {{previous declaration is here}}
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__device__ ~d_hdd() {} // expected-error {{destructor cannot be redeclared}}
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};
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// Test overloading of member functions
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struct m_h {
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void operator delete(void *ptr); // expected-note {{previous declaration is here}}
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__host__ void operator delete(void *ptr); // expected-error {{class member cannot be redeclared}}
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};
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// D/H overloading is OK
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struct m_dh {
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__device__ void operator delete(void *ptr);
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__host__ void operator delete(void *ptr);
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};
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// HD by itself is OK
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struct m_hd {
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__device__ __host__ void operator delete(void *ptr);
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};
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struct m_hhd {
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__host__ void operator delete(void *ptr) {} // expected-note {{previous declaration is here}}
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__host__ __device__ void operator delete(void *ptr) {} // expected-error {{class member cannot be redeclared}}
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};
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struct m_hdh {
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__host__ __device__ void operator delete(void *ptr) {} // expected-note {{previous declaration is here}}
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__host__ void operator delete(void *ptr) {} // expected-error {{class member cannot be redeclared}}
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};
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struct m_dhd {
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__device__ void operator delete(void *ptr) {} // expected-note {{previous declaration is here}}
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__host__ __device__ void operator delete(void *ptr) {} // expected-error {{class member cannot be redeclared}}
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};
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struct m_hdd {
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__host__ __device__ void operator delete(void *ptr) {} // expected-note {{previous declaration is here}}
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__device__ void operator delete(void *ptr) {} // expected-error {{class member cannot be redeclared}}
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};
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// __global__ functions can't be overloaded based on attribute
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// difference.
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struct G {
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friend void friend_of_g(G &arg);
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private:
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int x;
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};
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__global__ void friend_of_g(G &arg) { int x = arg.x; } // expected-note {{previous definition is here}}
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void friend_of_g(G &arg) { int x = arg.x; } // expected-error {{redefinition of 'friend_of_g'}}
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// HD functions are sometimes allowed to call H or D functions -- this
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// is an artifact of the source-to-source splitting performed by nvcc
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// that we need to mimic. During device mode compilation in nvcc, host
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// functions aren't present at all, so don't participate in
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// overloading. But in clang, H and D functions are present in both
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// compilation modes. Clang normally uses the target attribute as a
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// tiebreaker between overloads with otherwise identical priority, but
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// in order to match nvcc's behavior, we sometimes need to wholly
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// discard overloads that would not be present during compilation
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// under nvcc.
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template <typename T> TemplateReturnTy template_vs_function(T arg) {
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return TemplateReturnTy();
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}
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__device__ DeviceReturnTy template_vs_function(float arg) {
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return DeviceReturnTy();
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}
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// Here we expect to call the templated function during host compilation, even
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// if -fcuda-disable-target-call-checks is passed, and even though C++ overload
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// rules prefer the non-templated function.
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__host__ __device__ void test_host_device_calls_template(void) {
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#ifdef __CUDA_ARCH__
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typedef DeviceReturnTy ExpectedReturnTy;
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#else
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typedef TemplateReturnTy ExpectedReturnTy;
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#endif
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ExpectedReturnTy ret1 = template_vs_function(1.0f);
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ExpectedReturnTy ret2 = template_vs_function(2.0);
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}
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// Calls from __host__ and __device__ functions should always call the
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// overloaded function that matches their mode.
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__host__ void test_host_calls_template_fn() {
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TemplateReturnTy ret1 = template_vs_function(1.0f);
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TemplateReturnTy ret2 = template_vs_function(2.0);
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}
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__device__ void test_device_calls_template_fn() {
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DeviceReturnTy ret1 = template_vs_function(1.0f);
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DeviceReturnTy ret2 = template_vs_function(2.0);
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}
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// If we have a mix of HD and H-only or D-only candidates in the overload set,
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// normal C++ overload resolution rules apply first.
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template <typename T> TemplateReturnTy template_vs_hd_function(T arg) {
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return TemplateReturnTy();
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}
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__host__ __device__ HostDeviceReturnTy template_vs_hd_function(float arg) {
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return HostDeviceReturnTy();
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}
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__host__ __device__ void test_host_device_calls_hd_template() {
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HostDeviceReturnTy ret1 = template_vs_hd_function(1.0f);
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TemplateReturnTy ret2 = template_vs_hd_function(1);
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}
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__host__ void test_host_calls_hd_template() {
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HostDeviceReturnTy ret1 = template_vs_hd_function(1.0f);
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TemplateReturnTy ret2 = template_vs_hd_function(1);
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}
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__device__ void test_device_calls_hd_template() {
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HostDeviceReturnTy ret1 = template_vs_hd_function(1.0f);
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// Host-only function template is not callable with strict call checks,
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// so for device side HD function will be the only choice.
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HostDeviceReturnTy ret2 = template_vs_hd_function(1);
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}
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// Check that overloads still work the same way on both host and
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// device side when the overload set contains only functions from one
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// side of compilation.
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__device__ DeviceReturnTy device_only_function(int arg) { return DeviceReturnTy(); }
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__device__ DeviceReturnTy2 device_only_function(float arg) { return DeviceReturnTy2(); }
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__host__ HostReturnTy host_only_function(int arg) { return HostReturnTy(); }
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__host__ HostReturnTy2 host_only_function(float arg) { return HostReturnTy2(); }
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__host__ __device__ void test_host_device_single_side_overloading() {
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DeviceReturnTy ret1 = device_only_function(1);
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DeviceReturnTy2 ret2 = device_only_function(1.0f);
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HostReturnTy ret3 = host_only_function(1);
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HostReturnTy2 ret4 = host_only_function(1.0f);
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}
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