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 -Wno-deprecated
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 -Wno-deprecated
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#endif
46  extern __thread int t9;
47  static __thread int t10;
48  __thread __private_extern__ int t11;
49#if __cplusplus < 201103L
50  __thread auto int t12a; // expected-error-re {{cannot combine with previous '{{__thread|_Thread_local}}' declaration specifier}}
51  auto __thread int t12b; // expected-error {{cannot combine with previous 'auto' declaration specifier}}
52#elif !defined(CXX11)
53  __thread auto t12a = 0; // expected-error {{'_Thread_local' variables must have global storage}}
54  auto __thread t12b = 0; // expected-error {{'_Thread_local' variables must have global storage}}
55#endif
56  __thread register int t13a; // expected-error-re {{cannot combine with previous '{{__thread|_Thread_local|thread_local}}' declaration specifier}}
57  register __thread int t13b; // expected-error {{cannot combine with previous 'register' declaration specifier}}
58}
59
60__thread typedef int t14; // expected-error-re {{cannot combine with previous '{{__thread|_Thread_local|thread_local}}' declaration specifier}}
61__thread int t15; // expected-note {{previous definition is here}}
62extern int t15; // expected-error {{non-thread-local declaration of 't15' follows thread-local declaration}}
63extern int t16; // expected-note {{previous declaration is here}}
64__thread int t16; // expected-error {{thread-local declaration of 't16' follows non-thread-local declaration}}
65
66#ifdef CXX11
67extern thread_local int t17; // expected-note {{previous declaration is here}}
68_Thread_local int t17; // expected-error {{thread-local declaration of 't17' with static initialization follows declaration with dynamic initialization}}
69extern _Thread_local int t18; // expected-note {{previous declaration is here}}
70thread_local int t18; // expected-error {{thread-local declaration of 't18' with dynamic initialization follows declaration with static initialization}}
71#endif
72
73// PR13720
74__thread int thread_int;
75int *thread_int_ptr = &thread_int;
76#ifndef __cplusplus
77// expected-error@-2 {{initializer element is not a compile-time constant}}
78#endif
79void g() {
80  int *p = &thread_int; // This is perfectly fine, though.
81}
82#if __cplusplus >= 201103L
83constexpr int *thread_int_ptr_2 = &thread_int; // expected-error {{must be initialized by a constant expression}}
84#endif
85
86int non_const();
87__thread int non_const_init = non_const();
88#if !defined(__cplusplus)
89// expected-error@-2 {{initializer element is not a compile-time constant}}
90#elif !defined(CXX11)
91// expected-error@-4 {{initializer for thread-local variable must be a constant expression}}
92#if __cplusplus >= 201103L
93// expected-note@-6 {{use 'thread_local' to allow this}}
94#endif
95#endif
96
97#ifdef __cplusplus
98struct S {
99  ~S();
100};
101__thread S s;
102#if !defined(CXX11)
103// expected-error@-2 {{type of thread-local variable has non-trivial destruction}}
104#if __cplusplus >= 201103L
105// expected-note@-4 {{use 'thread_local' to allow this}}
106#endif
107#endif
108#endif
109
110#ifdef __cplusplus
111struct HasCtor {
112  HasCtor();
113};
114__thread HasCtor var_with_ctor;
115#if !defined(CXX11)
116// expected-error@-2 {{initializer for thread-local variable must be a constant expression}}
117#if __cplusplus >= 201103L
118// expected-note@-4 {{use 'thread_local' to allow this}}
119#endif
120#endif
121#endif
122
123__thread int aggregate[10] = {0};
124