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}}
7int [[gnu::unused]] attr_on_type;
8// expected-error@-1 {{'unused' attribute cannot be applied to types}}
9int *[[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}}
22void pr17424_5 [[gnu::fastcall]]();
23// expected-warning@-1 {{calling convention 'fastcall' ignored for this target}}
24
25// Valid cases.
26
27void aliasb [[gnu::alias("_Z6alias1v")]] ();
28void alias1() {}
29void aliasa [[gnu::alias("_Z6alias1v")]] ();
30
31extern struct PR22493Ty {
32} PR22493 [[gnu::alias("_ZN7pcrecpp2RE6no_argE")]];
33
34[[gnu::aligned(8)]] int aligned;
35void aligned_fn [[gnu::aligned(32)]] ();
36struct [[gnu::aligned(8)]] aligned_struct {};
37
38void always_inline [[gnu::always_inline]] ();
39
40__thread int tls_model [[gnu::tls_model("local-exec")]];
41
42void cleanup(int *p) {
43  int n [[gnu::cleanup(cleanup)]];
44}
45
46void deprecated1 [[gnu::deprecated]] (); // expected-note {{here}}
47[[gnu::deprecated("custom message")]] void deprecated2(); // expected-note {{here}}
48void 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
55void 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.
59int noreturn [[gnu::noreturn]]; // expected-warning {{'noreturn' only applies to function types}}
60int noreturn_fn_1();
61int noreturn_fn_2() [[gnu::noreturn]]; // expected-warning {{cannot be applied to a type}}
62int noreturn_fn_3 [[gnu::noreturn]] ();
63[[gnu::noreturn]] int noreturn_fn_4();
64int (*noreturn_fn_ptr_1 [[gnu::noreturn]])() = &noreturn_fn_1; // expected-error {{cannot initialize}}
65int (*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
69struct [[gnu::packed]] packed { char c; int n; };
70static_assert(sizeof(packed) == sizeof(char) + sizeof(int), "not packed");
71