1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -std=c++11 -verify %s 2 3 // Error cases. 4 5 [[gnu::this_attribute_does_not_exist]] int unknown_attr; 6 // expected-warning@-1 {{unknown attribute 'this_attribute_does_not_exist' ignored}} 7 int [[gnu::unused]] attr_on_type; 8 // expected-error@-1 {{'unused' attribute cannot be applied to types}} 9 int *[[gnu::unused]] attr_on_ptr; 10 // expected-warning@-1 {{attribute 'unused' ignored, because it cannot be applied to a type}} 11 12 // Valid cases. 13 14 void aliasb [[gnu::alias("_Z6alias1v")]] (); 15 void alias1() {} 16 void aliasa [[gnu::alias("_Z6alias1v")]] (); 17 18 [[gnu::aligned(8)]] int aligned; 19 void aligned_fn [[gnu::aligned(32)]] (); 20 struct [[gnu::aligned(8)]] aligned_struct {}; 21 22 void always_inline [[gnu::always_inline]] (); 23 24 __thread int tls_model [[gnu::tls_model("local-exec")]]; 25 26 void cleanup(int *p) { 27 int n [[gnu::cleanup(cleanup)]]; 28 } 29 30 void deprecated1 [[gnu::deprecated]] (); // expected-note {{here}} 31 [[gnu::deprecated("custom message")]] void deprecated2(); // expected-note {{here}} 32 void deprecated3() { 33 deprecated1(); // expected-warning {{deprecated}} 34 deprecated2(); // expected-warning {{custom message}} 35 } 36 37 [[gnu::naked(1,2,3)]] void naked(); // expected-error {{takes no arguments}} 38 39 void nonnull [[gnu::nonnull]] (); // expected-warning {{applied to function with no pointer arguments}} 40 41 // [[gnu::noreturn]] appertains to a declaration, and marks the innermost 42 // function declarator in that declaration as being noreturn. 43 int noreturn [[gnu::noreturn]]; // expected-warning {{'noreturn' only applies to function types}} 44 int noreturn_fn_1(); 45 int noreturn_fn_2() [[gnu::noreturn]]; // expected-warning {{cannot be applied to a type}} 46 int noreturn_fn_3 [[gnu::noreturn]] (); 47 [[gnu::noreturn]] int noreturn_fn_4(); 48 int (*noreturn_fn_ptr_1 [[gnu::noreturn]])() = &noreturn_fn_1; // expected-error {{cannot initialize}} 49 int (*noreturn_fn_ptr_2 [[gnu::noreturn]])() = &noreturn_fn_3; 50 [[gnu::noreturn]] int (*noreturn_fn_ptr_3)() = &noreturn_fn_1; // expected-error {{cannot initialize}} 51 [[gnu::noreturn]] int (*noreturn_fn_ptr_4)() = &noreturn_fn_3; 52 53 struct [[gnu::packed]] packed { char c; int n; }; 54 static_assert(sizeof(packed) == sizeof(char) + sizeof(int), "not packed"); 55
