1 /* Verify __builtin_has_attribute return value for types.
2 { dg-do compile }
3 { dg-options "-Wall -ftrack-macro-expansion=0" }
4 { dg-options "-Wall -Wno-narrowing -Wno-unused-local-typedefs -ftrack-macro-expansion=0" { target c++ } } */
5
6 #define ATTR(...) __attribute__ ((__VA_ARGS__))
7
8 #define A(expect, sym, attr) \
9 typedef int Assert [1 - 2 * !(__builtin_has_attribute (sym, attr) == expect)]
10
ATTR(packed)11 struct ATTR (packed) Packed { char c; int i; };
12
13 void fvoid (void);
14 struct Packed fpacked (void);
15
16 union OrdinaryUnion { void *p; int i; };
ATTR(transparent_union)17 union ATTR (transparent_union) TransparentUnion { void *p; int i; };
18
19 /* Exercise __builtin_has_attribute with the first argument that
20 is a type. */
21
test_type(int n)22 void test_type (int n)
23 {
24 /* Verify both forms of the attribute spelling. Unlike the attribute
25 keyword that can be spelled three ways (with either leading or
26 trailing underscores, or with both), attribute names can only be
27 spelled two ways. */
28 A (0, int, aligned);
29 A (0, int, __aligned__);
30
31 A (0, int, aligned (1));
32 A (0, int, aligned (2));
33 A (0, int[1], aligned);
34 A (0, int[1], aligned (2));
35 A (0, int[n], aligned);
36 A (0, int[n], aligned (4));
37
38 /* Again, verify both forms of the attribute spelling. */
39 A (1, ATTR (aligned) char, aligned);
40 A (1, ATTR (aligned (2)) short, aligned);
41 A (1, ATTR (aligned (4)) int, __aligned__);
42
43 A (0, int ATTR (aligned (4)), aligned (2));
44 A (0, int ATTR (aligned (2)), aligned (4));
45 /* GCC retains both attributes when the type is defined in the builtin. */
46 A (1, int ATTR (aligned (2), aligned (4)), aligned (2));
47 A (1, int ATTR (aligned (2), aligned (4)), aligned (4));
48 /* The following fails due to bug 87524.
49 A (1, int ATTR (aligned (4), aligned (2))), aligned (4)); */
50 A (0, int ATTR (aligned (4), aligned (2)), aligned (8));
51
52 A (1, int ATTR (aligned (8)), aligned (1 + 7));
53
54 enum { eight = 8 };
55 A (1, int ATTR (aligned (8)), aligned (eight));
56 A (1, int ATTR (aligned (eight)), aligned (1 + 7));
57
58 struct NotPacked { char c; int i; };
59 A (0, struct NotPacked, packed);
60 A (1, struct Packed, packed);
61
62 /* Exercise types returned from a function. */
63 A (0, fvoid (), packed);
64 A (1, fpacked (), packed);
65
66 struct ATTR (aligned (2), packed) Aligned2Packed { char c; int i; };
67 A (1, struct Aligned2Packed, aligned);
68 A (1, struct Aligned2Packed, aligned (2));
69 A (0, struct Aligned2Packed, aligned (4));
70 A (1, struct Aligned2Packed, packed);
71
72 A (0, int, may_alias);
73 A (1, ATTR (may_alias) int, may_alias);
74
75 A (0, char, warn_if_not_aligned (1));
76 A (0, char, warn_if_not_aligned (2));
77
78 A (1, ATTR (warn_if_not_aligned (2)) char, warn_if_not_aligned);
79 A (0, ATTR (warn_if_not_aligned (2)) char, warn_if_not_aligned (1));
80 A (1, ATTR (warn_if_not_aligned (2)) char, warn_if_not_aligned (2));
81 A (0, ATTR (warn_if_not_aligned (2)) char, warn_if_not_aligned (4));
82
83 A (0, union OrdinaryUnion, transparent_union);
84
85 A (1, union TransparentUnion, transparent_union);
86 A (1, const union TransparentUnion, transparent_union);
87 }
88
89 /* Exercise __builtin_has_attribute with the first argument that
90 is a typedef. */
91
test_typedef(int n)92 void test_typedef (int n)
93 {
94 typedef char A1[1];
95 A (0, A1, aligned);
96 A (0, A1, aligned (1));
97 A (0, A1, aligned (2));
98
99 typedef char An[n];
100 A (0, An, aligned);
101 A (0, An, aligned (1));
102 A (0, An, aligned (2));
103
104 typedef ATTR (aligned (8)) short AI8;
105 A (1, AI8, aligned);
106 A (0, AI8, aligned (4));
107 A (1, AI8, aligned (8));
108 A (0, AI8, aligned (16));
109
110 A (1, const AI8, aligned);
111 A (1, const volatile AI8, aligned);
112
113 typedef ATTR (aligned (2), aligned (8), aligned (16)) int AI16;
114 A (1, AI16, aligned);
115 A (0, AI16, aligned (1));
116 A (0, AI16, aligned (2));
117 A (0, AI16, aligned (4));
118 A (0, AI16, aligned (8));
119 A (1, AI16, aligned (16));
120 A (0, AI16, aligned (32));
121
122 typedef const AI16 CAI16;
123 A (1, CAI16, aligned);
124 A (0, CAI16, aligned (1));
125 A (1, CAI16, aligned (16));
126
127 typedef int I;
128 A (0, I, may_alias);
129 A (0, AI8, may_alias);
130
131 typedef ATTR (may_alias) int MAI;
132 A (1, MAI, may_alias);
133
134 typedef ATTR (aligned (4), may_alias) char A4MAC;
135 A (0, A4MAC, aligned (0)); /* { dg-warning "requested alignment .0. is not a positive power of 2" } */
136 A (0, A4MAC, aligned (1));
137 A (0, A4MAC, aligned (2));
138 A (1, A4MAC, aligned (4));
139 A (0, A4MAC, aligned (8));
140 A (1, A4MAC, may_alias);
141
142 typedef ATTR (may_alias, aligned (8)) char A8MAC;
143 A (1, A8MAC, aligned);
144 A (0, A8MAC, aligned (0)); /* { dg-warning "requested alignment .0. is not a positive power of 2" } */
145 A (0, A8MAC, aligned (1));
146 A (0, A8MAC, aligned (2));
147 A (0, A8MAC, aligned (4));
148 A (1, A8MAC, aligned (8));
149 A (0, A8MAC, aligned (16));
150 A (1, A8MAC, may_alias);
151
152 typedef ATTR (may_alias) const AI8 CMAI8;
153 A (1, CMAI8, aligned);
154 A (1, CMAI8, may_alias);
155 A (0, CMAI8, aligned (4));
156 A (1, CMAI8, aligned (8));
157
158 typedef void Fnull (void*, void*, void*);
159 A (0, Fnull, nonnull);
160 A (0, Fnull, nonnull (1));
161 A (0, Fnull, nonnull (2));
162 A (0, Fnull, nonnull (3));
163
164 typedef ATTR (nonnull) Fnull Fnonnull;
165 A (1, Fnonnull, nonnull);
166 A (1, Fnonnull, nonnull (1));
167 A (1, Fnonnull, nonnull (2));
168 A (1, Fnonnull, nonnull (3));
169
170 typedef ATTR (nonnull (2)) void Fnonnull_2 (void*, void*, void*);
171 A (0, Fnonnull_2, nonnull);
172 A (0, Fnonnull_2, nonnull (1));
173 A (1, Fnonnull_2, nonnull (2));
174 A (0, Fnonnull_2, nonnull (3));
175
176 typedef ATTR (nonnull (1), nonnull (2), nonnull (3))
177 void Fnonnull_1_2_3 (void*, void*, void*);
178
179 /* The following fails because the built-in doesn't recognize that
180 a single nonnull with no arguments is the same as one nonnull for
181 each function parameter. Disable the testing for now.
182 A (1, Fnonnull_1_2_3, nonnull);
183 */
184 A (1, Fnonnull_1_2_3, nonnull (1));
185 A (1, Fnonnull_1_2_3, nonnull (2));
186 A (1, Fnonnull_1_2_3, nonnull (3));
187
188 typedef void Freturns (void);
189 A (0, Fnull, noreturn);
190 A (0, Freturns, noreturn);
191
192 typedef ATTR (warn_if_not_aligned (8)) char CWA8;
193 A (0, CWA8, warn_if_not_aligned (2));
194 A (0, CWA8, warn_if_not_aligned (4));
195 A (1, CWA8, warn_if_not_aligned (8));
196 A (0, CWA8, warn_if_not_aligned (16));
197
198 typedef union OrdinaryUnion OrdUnion;
199 A (0, OrdUnion, transparent_union);
200
201 /* The attribute is ignored on typedefs but GCC fails to diagnose
202 it (see bug ). */
203 typedef union ATTR (transparent_union)
204 OrdinaryUnion TransUnion; /* { dg-warning "\\\[-Wattributes" "pr87578" { xfail { ! { c++ } } } } */
205 A (0, TransUnion, transparent_union);
206 }
207