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