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1 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify -pedantic %s -DGNU
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2 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify -pedantic -x c++ %s -DGNU -std=c++98
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3 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify -pedantic %s -std=c11 -DC11 -D__thread=_Thread_local
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4 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify=expected,thread-local -pedantic -x c++ %s -DC11 -D__thread=_Thread_local -std=c++98
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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
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6 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify=expected,thread-local -pedantic -x c++ %s -DC11 -D__thread=_Thread_local -std=c++11 -Wno-deprecated
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7 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -Wno-private-extern -verify=expected,thread-local -pedantic %s -std=c99 -D__thread=_Thread_local -DC99
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8
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9 #ifdef __cplusplus
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10 // In C++, we define __private_extern__ to extern.
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11 #undef __private_extern__
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12 #endif
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13
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14 __thread int t1; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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15 __thread extern int t2; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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16 __thread static int t3; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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17 #ifdef GNU
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18 // expected-warning@-3 {{'__thread' before 'extern'}}
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19 // expected-warning@-3 {{'__thread' before 'static'}}
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20 #endif
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21
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22 __thread __private_extern__ int t4; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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23 struct t5 { __thread int x; }; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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24 #ifdef __cplusplus
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25 // expected-error-re@-2 {{'{{__thread|_Thread_local|thread_local}}' is only allowed on variable declarations}}
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26 #else
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27 // FIXME: The 'is only allowed on variable declarations' diagnostic is better here.
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28 // expected-error@-5 {{type name does not allow storage class to be specified}}
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29 #endif
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30
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31 __thread int t6(); // thread-local-warning {{'_Thread_local' is a C11 extension}}
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32 #if defined(GNU)
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33 // expected-error@-2 {{'__thread' is only allowed on variable declarations}}
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34 #elif defined(C11) || defined(C99)
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35 // expected-error@-4 {{'_Thread_local' is only allowed on variable declarations}}
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36 #else
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37 // expected-error@-6 {{'thread_local' is only allowed on variable declarations}}
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38 #endif
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39
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40 int f(__thread int t7) { // expected-error {{' is only allowed on variable declarations}} \
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41 // thread-local-warning {{'_Thread_local' is a C11 extension}}
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42 __thread int t8; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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43 #if defined(GNU)
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44 // expected-error@-2 {{'__thread' variables must have global storage}}
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45 #elif defined(C11) || defined(C99)
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46 // expected-error@-4 {{'_Thread_local' variables must have global storage}}
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47 #endif
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48 extern __thread int t9; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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49 static __thread int t10; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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50 __thread __private_extern__ int t11; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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51 #if __cplusplus < 201103L
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52 __thread auto int t12a; // expected-error-re {{cannot combine with previous '{{__thread|_Thread_local}}' declaration specifier}} \
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53 // thread-local-warning {{'_Thread_local' is a C11 extension}}
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54 auto __thread int t12b; // expected-error {{cannot combine with previous 'auto' declaration specifier}} \
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55 // thread-local-warning {{'_Thread_local' is a C11 extension}}
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56 #elif !defined(CXX11)
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57 __thread auto t12a = 0; // expected-error {{'_Thread_local' variables must have global storage}} \
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58 // thread-local-warning {{'_Thread_local' is a C11 extension}}
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59 auto __thread t12b = 0; // expected-error {{'_Thread_local' variables must have global storage}} \
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60 // thread-local-warning {{'_Thread_local' is a C11 extension}}
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61 #endif
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62 __thread register int t13a; // expected-error-re {{cannot combine with previous '{{__thread|_Thread_local|thread_local}}' declaration specifier}} \
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63 // thread-local-warning {{'_Thread_local' is a C11 extension}}
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64 register __thread int t13b; // expected-error {{cannot combine with previous 'register' declaration specifier}} \
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65 // thread-local-warning {{'_Thread_local' is a C11 extension}}
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66 }
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67
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68 __thread typedef int t14; // expected-error-re {{cannot combine with previous '{{__thread|_Thread_local|thread_local}}' declaration specifier}} \
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69 // thread-local-warning {{'_Thread_local' is a C11 extension}}
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70 __thread int t15; // expected-note {{previous definition is here}} \
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71 // thread-local-warning {{'_Thread_local' is a C11 extension}}
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72 extern int t15; // expected-error {{non-thread-local declaration of 't15' follows thread-local declaration}}
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73 extern int t16; // expected-note {{previous declaration is here}}
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74 __thread int t16; // expected-error {{thread-local declaration of 't16' follows non-thread-local declaration}} \
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75 // thread-local-warning {{'_Thread_local' is a C11 extension}}
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76
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77 #ifdef CXX11
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78 extern thread_local int t17; // expected-note {{previous declaration is here}}
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79 _Thread_local int t17; // expected-error {{thread-local declaration of 't17' with static initialization follows declaration with dynamic initialization}} \
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80 // expected-warning {{'_Thread_local' is a C11 extension}}
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81 extern _Thread_local int t18; // expected-note {{previous declaration is here}} \
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82 // expected-warning {{'_Thread_local' is a C11 extension}}
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83 thread_local int t18; // expected-error {{thread-local declaration of 't18' with dynamic initialization follows declaration with static initialization}}
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84 #endif
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85
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86 // PR13720
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87 __thread int thread_int; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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88 int *thread_int_ptr = &thread_int;
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89 #ifndef __cplusplus
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90 // expected-error@-2 {{initializer element is not a compile-time constant}}
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91 #endif
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92 void g() {
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93 int *p = &thread_int; // This is perfectly fine, though.
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94 }
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95 #if __cplusplus >= 201103L
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96 constexpr int *thread_int_ptr_2 = &thread_int; // expected-error {{must be initialized by a constant expression}}
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97 #endif
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98
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99 int non_const();
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100 __thread int non_const_init = non_const(); // thread-local-warning {{'_Thread_local' is a C11 extension}}
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101 #if !defined(__cplusplus)
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102 // expected-error@-2 {{initializer element is not a compile-time constant}}
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103 #elif !defined(CXX11)
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104 // expected-error@-4 {{initializer for thread-local variable must be a constant expression}}
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105 #if __cplusplus >= 201103L
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106 // expected-note@-6 {{use 'thread_local' to allow this}}
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107 #endif
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108 #endif
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109
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110 #ifdef __cplusplus
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111 struct S {
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112 ~S();
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113 };
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114 __thread S s; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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115 #if !defined(CXX11)
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116 // expected-error@-2 {{type of thread-local variable has non-trivial destruction}}
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117 #if __cplusplus >= 201103L
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118 // expected-note@-4 {{use 'thread_local' to allow this}}
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119 #endif
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120 #endif
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121 #endif
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122
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123 #ifdef __cplusplus
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124 struct HasCtor {
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125 HasCtor();
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126 };
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127 __thread HasCtor var_with_ctor; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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128 #if !defined(CXX11)
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129 // expected-error@-2 {{initializer for thread-local variable must be a constant expression}}
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130 #if __cplusplus >= 201103L
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131 // expected-note@-4 {{use 'thread_local' to allow this}}
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132 #endif
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133 #endif
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134 #endif
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135
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136 __thread int aggregate[10] = {0}; // thread-local-warning {{'_Thread_local' is a C11 extension}}
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