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