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 [[gnu::fastcall]] void pr17424_1(); 12 // expected-warning@-1 {{calling convention 'fastcall' ignored for this target}} 13 [[gnu::fastcall]] [[gnu::stdcall]] void pr17424_2(); 14 // expected-warning@-1 {{calling convention 'fastcall' ignored for this target}} 15 // expected-warning@-2 {{calling convention 'stdcall' ignored for this target}} 16 [[gnu::fastcall]] __stdcall void pr17424_3(); 17 // expected-warning@-1 {{calling convention 'fastcall' ignored for this target}} 18 // expected-warning@-2 {{calling convention '__stdcall' ignored for this target}} 19 [[gnu::fastcall]] void pr17424_4() [[gnu::stdcall]]; 20 // expected-warning@-1 {{calling convention 'fastcall' ignored for this target}} 21 // expected-warning@-2 {{attribute 'stdcall' ignored, because it cannot be applied to a type}} 22 void pr17424_5 [[gnu::fastcall]](); 23 // expected-warning@-1 {{calling convention 'fastcall' ignored for this target}} 24 25 // Valid cases. 26 27 void aliasb [[gnu::alias("_Z6alias1v")]] (); 28 void alias1() {} 29 void aliasa [[gnu::alias("_Z6alias1v")]] (); 30 31 extern struct PR22493Ty { 32 } PR22493 [[gnu::alias("_ZN7pcrecpp2RE6no_argE")]]; 33 34 [[gnu::aligned(8)]] int aligned; 35 void aligned_fn [[gnu::aligned(32)]] (); 36 struct [[gnu::aligned(8)]] aligned_struct {}; 37 38 void always_inline [[gnu::always_inline]] (); 39 40 __thread int tls_model [[gnu::tls_model("local-exec")]]; 41 42 void cleanup(int *p) { 43 int n [[gnu::cleanup(cleanup)]]; 44 } 45 46 void deprecated1 [[gnu::deprecated]] (); // expected-note {{here}} 47 [[gnu::deprecated("custom message")]] void deprecated2(); // expected-note {{here}} 48 void deprecated3() { 49 deprecated1(); // expected-warning {{deprecated}} 50 deprecated2(); // expected-warning {{custom message}} 51 } 52 53 [[gnu::naked(1,2,3)]] void naked(); // expected-error {{takes no arguments}} 54 55 void nonnull [[gnu::nonnull]] (); // expected-warning {{applied to function with no pointer arguments}} 56 57 // [[gnu::noreturn]] appertains to a declaration, and marks the innermost 58 // function declarator in that declaration as being noreturn. 59 int noreturn [[gnu::noreturn]]; // expected-warning {{'noreturn' only applies to function types}} 60 int noreturn_fn_1(); 61 int noreturn_fn_2() [[gnu::noreturn]]; // expected-warning {{cannot be applied to a type}} 62 int noreturn_fn_3 [[gnu::noreturn]] (); 63 [[gnu::noreturn]] int noreturn_fn_4(); 64 int (*noreturn_fn_ptr_1 [[gnu::noreturn]])() = &noreturn_fn_1; // expected-error {{cannot initialize}} 65 int (*noreturn_fn_ptr_2 [[gnu::noreturn]])() = &noreturn_fn_3; 66 [[gnu::noreturn]] int (*noreturn_fn_ptr_3)() = &noreturn_fn_1; // expected-error {{cannot initialize}} 67 [[gnu::noreturn]] int (*noreturn_fn_ptr_4)() = &noreturn_fn_3; 68 69 struct [[gnu::packed]] packed { char c; int n; }; 70 static_assert(sizeof(packed) == sizeof(char) + sizeof(int), "not packed"); 71
