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;
22 struct 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 
39 int 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-re {{'_Thread_local' variables must have global storage}}
54   auto __thread t12b = 0; // expected-error-re {{'_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 declaration is here}}
62 extern int t15; // expected-error {{non-thread-local declaration of 't15' follows thread-local declaration}}
63 extern 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
67 extern 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}}
69 extern _Thread_local int t18; // expected-note {{previous declaration is here}}
70 thread_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;
75 int *thread_int_ptr = &thread_int;
76 #ifndef __cplusplus
77 // expected-error@-2 {{initializer element is not a compile-time constant}}
78 #endif
79 void g() {
80   int *p = &thread_int; // This is perfectly fine, though.
81 }
82 #if __cplusplus >= 201103L
83 constexpr int *thread_int_ptr_2 = &thread_int; // expected-error {{must be initialized by a constant expression}}
84 #endif
85 
86 int 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
98 struct 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 __thread int aggregate[10] = {0};
111