clang/test/Sema/thread-specifier.c

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