thread-specifier.c revision 6a570f610c101054e79af2fcdb73a10f8e3f337d 
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// RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify -pedantic -x c++ %s -DC11 -D__thread=_Thread_local -std=c++11
7
8#ifdef __cplusplus
9// In C++, we define __private_extern__ to extern.
10#undef __private_extern__
11#endif
12
13__thread int t1;
14__thread extern int t2;
15__thread static int t3;
16#ifdef GNU
17// expected-warning@-3 {{'__thread' before 'extern'}}
18// expected-warning@-3 {{'__thread' before 'static'}}
19#endif
20
21__thread __private_extern__ int t4;
22struct t5 { __thread int x; };
23#ifdef __cplusplus
24// expected-error-re@-2 {{'(__thread|_Thread_local|thread_local)' is only allowed on variable declarations}}
25#else
26// FIXME: The 'is only allowed on variable declarations' diagnostic is better here.
27// expected-error@-5 {{type name does not allow storage class to be specified}}
28#endif
29
30__thread int t6();
31#if defined(GNU)
32// expected-error@-2 {{'__thread' is only allowed on variable declarations}}
33#elif defined(C11)
34// expected-error@-4 {{'_Thread_local' is only allowed on variable declarations}}
35#else
36// expected-error@-6 {{'thread_local' is only allowed on variable declarations}}
37#endif
38
39int f(__thread int t7) { // expected-error {{' is only allowed on variable declarations}}
40  __thread int t8;
41#if defined(GNU)
42  // expected-error@-2 {{'__thread' variables must have global storage}}
43#elif defined(C11)
44  // expected-error@-4 {{'_Thread_local' variables must have global storage}}
45#else
46  // expected-error@-6 {{'thread_local' variables must have global storage}}
47#endif
48  extern __thread int t9;
49  static __thread int t10;
50  __thread __private_extern__ int t11;
51#if __cplusplus < 201103L
52  __thread auto int t12a; // expected-error-re {{cannot combine with previous '(__thread|_Thread_local)' declaration specifier}}
53  auto __thread int t12b; // expected-error {{cannot combine with previous 'auto' declaration specifier}}
54#else
55  __thread auto t12a = 0; // expected-error-re {{'(t|_T)hread_local' variables must have global storage}}
56  auto __thread t12b = 0; // expected-error-re {{'(t|_T)hread_local' variables must have global storage}}
57#endif
58  __thread register int t13a; // expected-error-re {{cannot combine with previous '(__thread|_Thread_local|thread_local)' declaration specifier}}
59  register __thread int t13b; // expected-error {{cannot combine with previous 'register' declaration specifier}}
60}
61
62__thread typedef int t14; // expected-error-re {{cannot combine with previous '(__thread|_Thread_local|thread_local)' declaration specifier}}
63__thread int t15; // expected-note {{previous declaration is here}}
64extern int t15; // expected-error {{non-thread-local declaration of 't15' follows thread-local declaration}}
65extern int t16; // expected-note {{previous declaration is here}}
66__thread int t16; // expected-error {{thread-local declaration of 't16' follows non-thread-local declaration}}
67
68#ifdef CXX11
69extern thread_local int t17; // expected-note {{previous declaration is here}}
70_Thread_local int t17; // expected-error {{thread-local declaration of 't17' with static initialization follows declaration with dynamic initialization}}
71extern _Thread_local int t18; // expected-note {{previous declaration is here}}
72thread_local int t18; // expected-error {{thread-local declaration of 't18' with dynamic initialization follows declaration with static initialization}}
73#endif
74
75// PR13720
76__thread int thread_int;
77int *thread_int_ptr = &thread_int;
78#ifndef __cplusplus
79// expected-error@-2 {{initializer element is not a compile-time constant}}
80#endif
81void g() {
82  int *p = &thread_int; // This is perfectly fine, though.
83}
84#if __cplusplus >= 201103L
85constexpr int *thread_int_ptr_2 = &thread_int; // expected-error {{must be initialized by a constant expression}}
86#endif
87
88int non_const();
89__thread int non_const_init = non_const();
90#if !defined(__cplusplus)
91// expected-error@-2 {{initializer element is not a compile-time constant}}
92#elif !defined(CXX11)
93// expected-error@-4 {{initializer for thread-local variable must be a constant expression}}
94#if __cplusplus >= 201103L
95// expected-note@-6 {{use 'thread_local' to allow this}}
96#endif
97#endif
98
99#ifdef __cplusplus
100struct S {
101  ~S();
102};
103__thread S s;
104#if !defined(CXX11)
105// expected-error@-2 {{type of thread-local variable has non-trivial destruction}}
106#if __cplusplus >= 201103L
107// expected-note@-4 {{use 'thread_local' to allow this}}
108#endif
109#endif
110#endif
111