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 // expected-warning@-3 {{calling convention 'stdcall' ignored for this target}} 23 void pr17424_5 [[gnu::fastcall]](); 24 // expected-warning@-1 {{calling convention 'fastcall' ignored for this target}} 25 26 // Valid cases. 27 28 void aliasb [[gnu::alias("_Z6alias1v")]] (); 29 void alias1() {} 30 void aliasa [[gnu::alias("_Z6alias1v")]] (); 31 32 extern struct PR22493Ty { 33 } PR22493 [[gnu::alias("_ZN7pcrecpp2RE6no_argE")]]; 34 35 [[gnu::aligned(8)]] int aligned; 36 void aligned_fn [[gnu::aligned(32)]] (); 37 struct [[gnu::aligned(8)]] aligned_struct {}; 38 39 void always_inline [[gnu::always_inline]] (); 40 41 __thread int tls_model [[gnu::tls_model("local-exec")]]; 42 43 void cleanup(int *p) { 44 int n [[gnu::cleanup(cleanup)]]; 45 } 46 47 void deprecated1 [[gnu::deprecated]] (); // expected-note {{here}} 48 [[gnu::deprecated("custom message")]] void deprecated2(); // expected-note {{here}} 49 void deprecated3() { 50 deprecated1(); // expected-warning {{deprecated}} 51 deprecated2(); // expected-warning {{custom message}} 52 } 53 54 [[gnu::naked(1,2,3)]] void naked(); // expected-error {{takes no arguments}} 55 56 void nonnull [[gnu::nonnull]] (); // expected-warning {{applied to function with no pointer arguments}} 57 58 // [[gnu::noreturn]] appertains to a declaration, and marks the innermost 59 // function declarator in that declaration as being noreturn. 60 int noreturn [[gnu::noreturn]]; // expected-warning {{'noreturn' only applies to function types}} 61 int noreturn_fn_1(); 62 int noreturn_fn_2() [[gnu::noreturn]]; // expected-warning {{cannot be applied to a type}} 63 int noreturn_fn_3 [[gnu::noreturn]] (); 64 [[gnu::noreturn]] int noreturn_fn_4(); 65 int (*noreturn_fn_ptr_1 [[gnu::noreturn]])() = &noreturn_fn_1; // expected-error {{cannot initialize}} 66 int (*noreturn_fn_ptr_2 [[gnu::noreturn]])() = &noreturn_fn_3; 67 [[gnu::noreturn]] int (*noreturn_fn_ptr_3)() = &noreturn_fn_1; // expected-error {{cannot initialize}} 68 [[gnu::noreturn]] int (*noreturn_fn_ptr_4)() = &noreturn_fn_3; 69 70 struct [[gnu::packed]] packed { char c; int n; }; 71 static_assert(sizeof(packed) == sizeof(char) + sizeof(int), "not packed"); 72
