1 // RUN: %clang_cc1 %s -fsyntax-only -verify 2 // expected-no-diagnostics 3 4 // Packed structs. 5 struct s { 6 char a; 7 int b __attribute__((packed)); 8 char c; 9 int d; 10 }; 11 12 extern int a1[sizeof(struct s) == 12 ? 1 : -1]; 13 extern int a2[__alignof(struct s) == 4 ? 1 : -1]; 14 15 struct __attribute__((packed)) packed_s { 16 char a; 17 int b __attribute__((packed)); 18 char c; 19 int d; 20 }; 21 22 extern int b1[sizeof(struct packed_s) == 10 ? 1 : -1]; 23 extern int b2[__alignof(struct packed_s) == 1 ? 1 : -1]; 24 25 struct fas { 26 char a; 27 int b[]; 28 }; 29 30 extern int c1[sizeof(struct fas) == 4 ? 1 : -1]; 31 extern int c2[__alignof(struct fas) == 4 ? 1 : -1]; 32 33 struct __attribute__((packed)) packed_fas { 34 char a; 35 int b[]; 36 }; 37 38 extern int d1[sizeof(struct packed_fas) == 1 ? 1 : -1]; 39 extern int d2[__alignof(struct packed_fas) == 1 ? 1 : -1]; 40 41 struct packed_after_fas { 42 char a; 43 int b[]; 44 } __attribute__((packed)); 45 46 extern int d1_2[sizeof(struct packed_after_fas) == 1 ? 1 : -1]; 47 extern int d2_2[__alignof(struct packed_after_fas) == 1 ? 1 : -1]; 48 49 // Alignment 50 51 struct __attribute__((aligned(8))) as1 { 52 char c; 53 }; 54 55 extern int e1[sizeof(struct as1) == 8 ? 1 : -1]; 56 extern int e2[__alignof(struct as1) == 8 ? 1 : -1]; 57 58 // FIXME: Will need to force arch once max usable alignment isn't hard 59 // coded. 60 struct __attribute__((aligned)) as1_2 { 61 char c; 62 }; 63 extern int e1_2[sizeof(struct as1_2) == 16 ? 1 : -1]; 64 extern int e2_2[__alignof(struct as1_2) == 16 ? 1 : -1]; 65 66 struct as2 { 67 char c; 68 int __attribute__((aligned(8))) a; 69 }; 70 71 extern int f1[sizeof(struct as2) == 16 ? 1 : -1]; 72 extern int f2[__alignof(struct as2) == 8 ? 1 : -1]; 73 74 struct __attribute__((packed)) as3 { 75 char c; 76 int a; 77 int __attribute__((aligned(8))) b; 78 }; 79 80 extern int g1[sizeof(struct as3) == 16 ? 1 : -1]; 81 extern int g2[__alignof(struct as3) == 8 ? 1 : -1]; 82 83 84 // rdar://5921025 85 struct packedtest { 86 int ted_likes_cheese; 87 void *args[] __attribute__((packed)); 88 }; 89 90 // Packed union 91 union __attribute__((packed)) au4 {char c; int x;}; 92 extern int h1[sizeof(union au4) == 4 ? 1 : -1]; 93 extern int h2[__alignof(union au4) == 1 ? 1 : -1]; 94 95 // Aligned union 96 union au5 {__attribute__((aligned(4))) char c;}; 97 extern int h1[sizeof(union au5) == 4 ? 1 : -1]; 98 extern int h2[__alignof(union au5) == 4 ? 1 : -1]; 99 100 // Alignment+packed 101 struct as6 {char c; __attribute__((packed, aligned(2))) int x;}; 102 extern int i1[sizeof(struct as6) == 6 ? 1 : -1]; 103 extern int i2[__alignof(struct as6) == 2 ? 1 : -1]; 104 105 union au6 {char c; __attribute__((packed, aligned(2))) int x;}; 106 extern int k1[sizeof(union au6) == 4 ? 1 : -1]; 107 extern int k2[__alignof(union au6) == 2 ? 1 : -1]; 108 109 // Check postfix attributes 110 union au7 {char c; int x;} __attribute__((packed)); 111 extern int l1[sizeof(union au7) == 4 ? 1 : -1]; 112 extern int l2[__alignof(union au7) == 1 ? 1 : -1]; 113 114 struct packed_fas2 { 115 char a; 116 int b[]; 117 } __attribute__((packed)); 118 119 extern int m1[sizeof(struct packed_fas2) == 1 ? 1 : -1]; 120 extern int m2[__alignof(struct packed_fas2) == 1 ? 1 : -1]; 121 122 // Attribute aligned can round down typedefs. PR9253 123 typedef long long __attribute__((aligned(1))) nt; 124 125 struct nS { 126 char buf_nr; 127 nt start_lba; 128 }; 129 130 extern int n1[sizeof(struct nS) == 9 ? 1 : -1]; 131 extern int n2[__alignof(struct nS) == 1 ? 1 : -1]; 132 133 134 135 136
