test/SemaCUDA/call-device-fn-from-host.cu

   1 // RUN: %clang_cc1 %s --std=c++11 -triple x86_64-unknown-linux -emit-llvm -o - \
   2 // RUN:   -verify -verify-ignore-unexpected=note
   3
   4 // Note: This test won't work with -fsyntax-only, because some of these errors
   5 // are emitted during codegen.
   6
   7 #include "Inputs/cuda.h"
   8
   9 __device__ void device_fn() {}
  10 // expected-note@-1 5 {{'device_fn' declared here}}
  11
  12 struct S {
  13   __device__ S() {}
  14   // expected-note@-1 2 {{'S' declared here}}
  15   __device__ ~S() { device_fn(); }
  16   // expected-note@-1 {{'~S' declared here}}
  17   int x;
  18 };
  19
  20 struct T {
  21   __host__ __device__ void hd() { device_fn(); }
  22   // expected-error@-1 {{reference to __device__ function 'device_fn' in __host__ __device__ function}}
  23
  24   // No error; this is (implicitly) inline and is never called, so isn't
  25   // codegen'ed.
  26   __host__ __device__ void hd2() { device_fn(); }
  27
  28   __host__ __device__ void hd3();
  29
  30   __device__ void d() {}
  31   // expected-note@-1 {{'d' declared here}}
  32 };
  33
  34 __host__ __device__ void T::hd3() {
  35   device_fn();
  36   // expected-error@-1 {{reference to __device__ function 'device_fn' in __host__ __device__ function}}
  37 }
  38
  39 template <typename T> __host__ __device__ void hd2() { device_fn(); }
  40 // expected-error@-1 {{reference to __device__ function 'device_fn' in __host__ __device__ function}}
  41 void host_fn() { hd2<int>(); }
  42
  43 __host__ __device__ void hd() { device_fn(); }
  44 // expected-error@-1 {{reference to __device__ function 'device_fn' in __host__ __device__ function}}
  45
  46 // No error because this is never instantiated.
  47 template <typename T> __host__ __device__ void hd3() { device_fn(); }
  48
  49 __host__ __device__ void local_var() {
  50   S s;
  51   // expected-error@-1 {{reference to __device__ function 'S' in __host__ __device__ function}}
  52 }
  53
  54 __host__ __device__ void placement_new(char *ptr) {
  55   ::new(ptr) S();
  56   // expected-error@-1 {{reference to __device__ function 'S' in __host__ __device__ function}}
  57 }
  58
  59 __host__ __device__ void explicit_destructor(S *s) {
  60   s->~S();
  61   // expected-error@-1 {{reference to __device__ function '~S' in __host__ __device__ function}}
  62 }
  63
  64 __host__ __device__ void hd_member_fn() {
  65   T t;
  66   // Necessary to trigger an error on T::hd.  It's (implicitly) inline, so
  67   // isn't codegen'ed until we call it.
  68   t.hd();
  69 }
  70
  71 __host__ __device__ void h_member_fn() {
  72   T t;
  73   t.d();
  74   // expected-error@-1 {{reference to __device__ function 'd' in __host__ __device__ function}}
  75 }
  76
  77 __host__ __device__ void fn_ptr() {
  78   auto* ptr = &device_fn;
  79   // expected-error@-1 {{reference to __device__ function 'device_fn' in __host__ __device__ function}}
  80 }
  81
  82 template <typename T>
  83 __host__ __device__ void fn_ptr_template() {
  84   auto* ptr = &device_fn;  // Not an error because the template isn't instantiated.
  85 }