thread-specifier.c revision ec64244f5939fa81596fbeddad966cca4b4a4c51 
1// RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify -pedantic %s -DGNU
2// RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify -pedantic -x c++ %s -DGNU
3// RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify -pedantic %s -DC11 -D__thread=_Thread_local
4// RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify -pedantic -x c++ %s -DC11 -D__thread=_Thread_local
5// RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify -pedantic -x c++ %s -DCXX11 -D__thread=thread_local -std=c++11
6
7#ifdef __cplusplus
8// In C++, we define __private_extern__ to extern.
9#undef __private_extern__
10#endif
11
12__thread int t1;
13__thread extern int t2;
14__thread static int t3;
15#ifdef GNU
16// expected-warning@-3 {{'__thread' before 'extern'}}
17// expected-warning@-3 {{'__thread' before 'static'}}
18#endif
19
20__thread __private_extern__ int t4;
21struct t5 { __thread int x; };
22#ifdef __cplusplus
23// expected-error-re@-2 {{'(__thread|_Thread_local|thread_local)' is only allowed on variable declarations}}
24#else
25// FIXME: The 'is only allowed on variable declarations' diagnostic is better here.
26// expected-error@-5 {{type name does not allow storage class to be specified}}
27#endif
28
29__thread int t6();
30#if defined(GNU)
31// expected-error@-2 {{'__thread' is only allowed on variable declarations}}
32#elif defined(C11)
33// expected-error@-4 {{'_Thread_local' is only allowed on variable declarations}}
34#else
35// expected-error@-6 {{'thread_local' is only allowed on variable declarations}}
36#endif
37
38int f(__thread int t7) { // expected-error {{' is only allowed on variable declarations}}
39  __thread int t8;
40#if defined(GNU)
41  // expected-error@-2 {{'__thread' variables must have global storage}}
42#elif defined(C11)
43  // expected-error@-4 {{'_Thread_local' variables must have global storage}}
44#else
45  // expected-error@-6 {{'thread_local' variables must have global storage}}
46#endif
47  extern __thread int t9;
48  static __thread int t10;
49  __thread __private_extern__ int t11;
50#if __cplusplus < 201103L
51  __thread auto int t12a; // expected-error-re {{cannot combine with previous '(__thread|_Thread_local)' declaration specifier}}
52  auto __thread int t12b; // expected-error {{cannot combine with previous 'auto' declaration specifier}}
53#else
54  __thread auto t12a = 0; // expected-error {{'thread_local' variables must have global storage}}
55  auto __thread t12b = 0; // expected-error {{'thread_local' variables must have global storage}}
56#endif
57  __thread register int t13a; // expected-error-re {{cannot combine with previous '(__thread|_Thread_local|thread_local)' declaration specifier}}
58  register __thread int t13b; // expected-error {{cannot combine with previous 'register' declaration specifier}}
59}
60
61__thread typedef int t14; // expected-error-re {{cannot combine with previous '(__thread|_Thread_local|thread_local)' declaration specifier}}
62__thread int t15; // expected-note {{previous definition is here}}
63extern int t15; // expected-error {{non-thread-local declaration of 't15' follows thread-local declaration}}
64extern int t16; // expected-note {{previous definition is here}}
65__thread int t16; // expected-error {{thread-local declaration of 't16' follows non-thread-local declaration}}
66
67// PR13720
68__thread int thread_int;
69int *thread_int_ptr = &thread_int;
70#ifndef __cplusplus
71// expected-error@-2 {{initializer element is not a compile-time constant}}
72#endif
73void g() {
74  int *p = &thread_int; // This is perfectly fine, though.
75}
76#if __cplusplus >= 201103L
77constexpr int *thread_int_ptr_2 = &thread_int; // expected-error {{must be initialized by a constant expression}}
78#endif
79