1 // RUN: %clang_cc1 -fsyntax-only -verify %s -DNONE -Wno-gnu 2 // RUN: %clang_cc1 -fsyntax-only -verify %s -DALL -Wgnu 3 // RUN: %clang_cc1 -fsyntax-only -verify %s -DALL -Wno-gnu \ 4 // RUN: -Wgnu-alignof-expression -Wgnu-case-range -Wgnu-complex-integer -Wgnu-conditional-omitted-operand \ 5 // RUN: -Wgnu-empty-initializer -Wgnu-label-as-value -Wgnu-statement-expression \ 6 // RUN: -Wgnu-compound-literal-initializer -Wgnu-flexible-array-initializer \ 7 // RUN: -Wgnu-redeclared-enum -Wgnu-folding-constant -Wgnu-empty-struct \ 8 // RUN: -Wgnu-union-cast -Wgnu-variable-sized-type-not-at-end 9 // RUN: %clang_cc1 -fsyntax-only -verify %s -DNONE -Wgnu \ 10 // RUN: -Wno-gnu-alignof-expression -Wno-gnu-case-range -Wno-gnu-complex-integer -Wno-gnu-conditional-omitted-operand \ 11 // RUN: -Wno-gnu-empty-initializer -Wno-gnu-label-as-value -Wno-gnu-statement-expression \ 12 // RUN: -Wno-gnu-compound-literal-initializer -Wno-gnu-flexible-array-initializer \ 13 // RUN: -Wno-gnu-redeclared-enum -Wno-gnu-folding-constant -Wno-gnu-empty-struct \ 14 // RUN: -Wno-gnu-union-cast -Wno-gnu-variable-sized-type-not-at-end 15 // Additional disabled tests: 16 // %clang_cc1 -fsyntax-only -verify %s -DALIGNOF -Wno-gnu -Wgnu-alignof-expression 17 // %clang_cc1 -fsyntax-only -verify %s -DCASERANGE -Wno-gnu -Wgnu-case-range 18 // %clang_cc1 -fsyntax-only -verify %s -DCOMPLEXINT -Wno-gnu -Wgnu-complex-integer 19 // %clang_cc1 -fsyntax-only -verify %s -DOMITTEDOPERAND -Wno-gnu -Wgnu-conditional-omitted-operand 20 // %clang_cc1 -fsyntax-only -verify %s -DEMPTYINIT -Wno-gnu -Wgnu-empty-initializer 21 // %clang_cc1 -fsyntax-only -verify %s -DLABELVALUE -Wno-gnu -Wgnu-label-as-value 22 // %clang_cc1 -fsyntax-only -verify %s -DSTATEMENTEXP -Wno-gnu -Wgnu-statement-expression 23 // %clang_cc1 -fsyntax-only -verify %s -DSTATEMENTEXPMACRO -Wno-gnu -Wgnu-statement-expression-from-macro-expansion 24 // %clang_cc1 -fsyntax-only -verify %s -DCOMPOUNDLITERALINITIALIZER -Wno-gnu -Wgnu-compound-literal-initializer 25 // %clang_cc1 -fsyntax-only -verify %s -DFLEXIBLEARRAYINITIALIZER -Wno-gnu -Wgnu-flexible-array-initializer 26 // %clang_cc1 -fsyntax-only -verify %s -DREDECLAREDENUM -Wno-gnu -Wgnu-redeclared-enum 27 // %clang_cc1 -fsyntax-only -verify %s -DUNIONCAST -Wno-gnu -Wgnu-union-cast 28 // %clang_cc1 -fsyntax-only -verify %s -DVARIABLESIZEDTYPENOTATEND -Wno-gnu -Wgnu-variable-sized-type-not-at-end 29 // %clang_cc1 -fsyntax-only -verify %s -DFOLDINGCONSTANT -Wno-gnu -Wgnu-folding-constant 30 // %clang_cc1 -fsyntax-only -verify %s -DEMPTYSTRUCT -Wno-gnu -Wgnu-empty-struct 31 32 #if NONE 33 // expected-no-diagnostics 34 #endif 35 36 37 #if ALL || ALIGNOF 38 // expected-warning@+4 {{'_Alignof' applied to an expression is a GNU extension}} 39 #endif 40 41 char align; 42 _Static_assert(_Alignof(align) > 0, "align's alignment is wrong"); 43 44 45 #if ALL || CASERANGE 46 // expected-warning@+5 {{use of GNU case range extension}} 47 #endif 48 49 void caserange(int x) { 50 switch (x) { 51 case 42 ... 44: ; 52 } 53 } 54 55 56 #if ALL || COMPLEXINT 57 // expected-warning@+3 {{complex integer types are a GNU extension}} 58 #endif 59 60 _Complex short int complexint; 61 62 63 #if ALL || OMITTEDOPERAND 64 // expected-warning@+3 {{use of GNU ?: conditional expression extension, omitting middle operand}} 65 #endif 66 67 static const char* omittedoperand = (const char*)0 ?: "Null"; 68 69 70 #if ALL || EMPTYINIT 71 // expected-warning@+3 {{use of GNU empty initializer extension}} 72 #endif 73 74 struct { int x; } emptyinit = {}; 75 76 77 #if ALL || LABELVALUE 78 // expected-warning@+6 {{use of GNU address-of-label extension}} 79 // expected-warning@+7 {{use of GNU indirect-goto extension}} 80 #endif 81 82 void labelvalue(void) { 83 void *ptr; 84 ptr = &&foo; 85 foo: 86 goto *ptr; 87 } 88 89 90 #if ALL || STATEMENTEXP 91 // expected-warning@+5 {{use of GNU statement expression extension}} 92 #endif 93 94 void statementexp(void) 95 { 96 int a = ({ 1; }); 97 } 98 99 #if ALL || STATEMENTEXP || STATEMENTEXPMACRO 100 // expected-warning@+5 {{use of GNU statement expression extension from macro expansion}} 101 #endif 102 103 #define STMT_EXPR_MACRO(a) ({ (a); }) 104 void statementexprmacro(void) { 105 int a = STMT_EXPR_MACRO(1); 106 } 107 108 #if ALL || COMPOUNDLITERALINITIALIZER 109 // expected-warning@+4 {{initialization of an array of type 'int[5]' from a compound literal of type 'int[5]' is a GNU extension}} 110 #endif 111 112 typedef int int5[5]; 113 int cli[5] = (int[]){1, 2, 3, 4, 5}; 114 115 116 #if ALL || FLEXIBLEARRAYINITIALIZER 117 // expected-note@+6 {{initialized flexible array member 'y' is here}} 118 // expected-warning@+6 {{flexible array initialization is a GNU extension}} 119 #endif 120 121 struct fai { 122 int x; 123 int y[]; 124 } fai = { 1, { 2, 3, 4 } }; 125 126 127 #if ALL || FOLDINGCONSTANT 128 // expected-warning@+5 {{expression is not an integer constant expression; folding it to a constant is a GNU extension}} 129 // expected-warning@+7 {{variable length array folded to constant array as an extension}} 130 #endif 131 132 enum { 133 fic = (int)(0.75 * 1000 * 1000) 134 }; 135 static const int size = 100; 136 int data[size]; 137 138 void foo(void) { int data[size]; } // OK, always a VLA 139 140 #if ALL || REDECLAREDENUM 141 // expected-note@+4 {{previous definition is here}} 142 // expected-warning@+8 {{redeclaration of already-defined enum 'RE' is a GNU extension}} 143 #endif 144 145 enum RE { 146 Val1, 147 Val2 148 }; 149 150 enum RE; 151 152 153 #if ALL || UNIONCAST 154 // expected-warning@+4 {{cast to union type is a GNU extension}} 155 #endif 156 157 union uc { int i; unsigned : 3; }; 158 union uc w = (union uc)2; 159 160 161 #if ALL || VARIABLESIZEDTYPENOTATEND 162 // expected-warning@+8 {{field 'hdr' with variable sized type 'struct vst' not at the end of a struct or class is a GNU extension}} 163 #endif 164 165 struct vst { 166 short tag_type; 167 char tag_data[]; 168 }; 169 struct vstnae { 170 struct vst hdr; 171 char data; 172 }; 173 174 175 #if ALL || EMPTYSTRUCT 176 // expected-warning@+4 {{empty struct is a GNU extension}} 177 // expected-warning@+4 {{struct without named members is a GNU extension}} 178 #endif 179 180 const struct {} es; 181 struct {int:5;} swnm; 182 183