1 // RUN: %clang_cc1 -fsyntax-only -Wundefined-internal -verify %s
2 // RUN: %clang_cc1 -fsyntax-only -Wundefined-internal -fcuda-is-device -verify %s
3
4 // RUN: %clang_cc1 -fsyntax-only -Wundefined-internal -fgpu-rdc -verify=rdc %s
5 // RUN: %clang_cc1 -fsyntax-only -Wundefined-internal -fcuda-is-device -fgpu-rdc -verify=rdc %s
6
7 // Most of these declarations are fine in separate compilation mode.
8
9 #include "Inputs/cuda.h"
10
foo()11 __device__ void foo() {
12 extern __shared__ int x; // expected-error {{__shared__ variable 'x' cannot be 'extern'}}
13 extern __shared__ int arr[]; // ok
14 extern __shared__ int arr0[0]; // expected-error {{__shared__ variable 'arr0' cannot be 'extern'}}
15 extern __shared__ int arr1[1]; // expected-error {{__shared__ variable 'arr1' cannot be 'extern'}}
16 extern __shared__ int* ptr ; // expected-error {{__shared__ variable 'ptr' cannot be 'extern'}}
17 }
18
bar()19 __host__ __device__ void bar() {
20 extern __shared__ int arr[]; // ok
21 extern __shared__ int arr0[0]; // expected-error {{__shared__ variable 'arr0' cannot be 'extern'}}
22 extern __shared__ int arr1[1]; // expected-error {{__shared__ variable 'arr1' cannot be 'extern'}}
23 extern __shared__ int* ptr ; // expected-error {{__shared__ variable 'ptr' cannot be 'extern'}}
24 }
25
26 extern __shared__ int global; // expected-error {{__shared__ variable 'global' cannot be 'extern'}}
27 extern __shared__ int global_arr[]; // ok
28 extern __shared__ int global_arr1[1]; // expected-error {{__shared__ variable 'global_arr1' cannot be 'extern'}}
29
30 // Check that, iff we're not in rdc mode, extern __shared__ can appear in an
31 // anonymous namespace / in a static function without generating a warning
32 // about a variable with internal linkage but no definition
33 // (-Wundefined-internal).
34 namespace {
35 extern __shared__ int global_arr[]; // rdc-warning {{has internal linkage but is not defined}}
in_anon_ns()36 __global__ void in_anon_ns() {
37 extern __shared__ int local_arr[]; // rdc-warning {{has internal linkage but is not defined}}
38
39 // Touch arrays to generate the warning.
40 local_arr[0] = 0; // rdc-note {{used here}}
41 global_arr[0] = 0; // rdc-note {{used here}}
42 }
43 } // namespace
44