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150
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1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -std=c++11 -Wno-gcc-compat -verify %s
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2
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3 // Error cases.
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4
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5 [[gnu::this_attribute_does_not_exist]] int unknown_attr;
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6 // expected-warning@-1 {{unknown attribute 'this_attribute_does_not_exist' ignored}}
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7 int [[gnu::unused]] attr_on_type;
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8 // expected-error@-1 {{'unused' attribute cannot be applied to types}}
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9 int *[[gnu::unused]] attr_on_ptr;
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10 // expected-warning@-1 {{attribute 'unused' ignored, because it cannot be applied to a type}}
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11 [[gnu::fastcall]] void pr17424_1();
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12 // expected-warning@-1 {{'fastcall' calling convention is not supported for this target}}
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13 [[gnu::fastcall]] [[gnu::stdcall]] void pr17424_2();
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14 // expected-warning@-1 {{'fastcall' calling convention is not supported for this target}}
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15 // expected-warning@-2 {{'stdcall' calling convention is not supported for this target}}
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16 [[gnu::fastcall]] __stdcall void pr17424_3();
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17 // expected-warning@-1 {{'fastcall' calling convention is not supported for this target}}
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18 // expected-warning@-2 {{'__stdcall' calling convention is not supported for this target}}
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19 [[gnu::fastcall]] void pr17424_4() [[gnu::stdcall]];
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20 // expected-warning@-1 {{'fastcall' calling convention is not supported for this target}}
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21 // expected-warning@-2 {{'stdcall' calling convention is not supported for this target}}
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22 void pr17424_5 [[gnu::fastcall]]();
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23 // expected-warning@-1 {{'fastcall' calling convention is not supported for this target}}
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24
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25 // Valid cases.
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26
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27 void aliasb [[gnu::alias("_Z6alias1v")]] ();
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28 void alias1() {}
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29 void aliasa [[gnu::alias("_Z6alias1v")]] ();
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30
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31 extern struct PR22493Ty {
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32 } PR22493 [[gnu::alias("_ZN7pcrecpp2RE6no_argE")]];
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33
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34 [[gnu::aligned(8)]] int aligned;
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35 void aligned_fn [[gnu::aligned(32)]] ();
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36 struct [[gnu::aligned(8)]] aligned_struct {};
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37
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38 void always_inline [[gnu::always_inline]] ();
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39
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40 __thread int tls_model [[gnu::tls_model("local-exec")]];
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41
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42 void cleanup(int *p) {
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43 int n [[gnu::cleanup(cleanup)]];
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44 }
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45
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46 void deprecated1 [[gnu::deprecated]] (); // expected-note {{here}}
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47 [[gnu::deprecated("custom message")]] void deprecated2(); // expected-note {{here}}
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48 void deprecated3() {
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49 deprecated1(); // expected-warning {{deprecated}}
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50 deprecated2(); // expected-warning {{custom message}}
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51 }
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52
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53 [[gnu::naked(1,2,3)]] void naked(); // expected-error {{takes no arguments}}
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54
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55 void nonnull [[gnu::nonnull]] (); // expected-warning {{applied to function with no pointer arguments}}
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56
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57 // [[gnu::noreturn]] appertains to a declaration, and marks the innermost
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58 // function declarator in that declaration as being noreturn.
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59 int noreturn [[gnu::noreturn]]; // expected-warning {{'noreturn' only applies to function types}}
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60 int noreturn_fn_1();
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61 int noreturn_fn_2() [[gnu::noreturn]]; // expected-warning {{cannot be applied to a type}}
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62 int noreturn_fn_3 [[gnu::noreturn]] ();
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63 [[gnu::noreturn]] int noreturn_fn_4();
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64 int (*noreturn_fn_ptr_1 [[gnu::noreturn]])() = &noreturn_fn_1; // expected-error {{cannot initialize}}
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65 int (*noreturn_fn_ptr_2 [[gnu::noreturn]])() = &noreturn_fn_3;
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66 [[gnu::noreturn]] int (*noreturn_fn_ptr_3)() = &noreturn_fn_1; // expected-error {{cannot initialize}}
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67 [[gnu::noreturn]] int (*noreturn_fn_ptr_4)() = &noreturn_fn_3;
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68
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69 struct [[gnu::packed]] packed { char c; int n; };
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70 static_assert(sizeof(packed) == sizeof(char) + sizeof(int), "not packed");
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