1 // RUN: %clang_cc1 -w -fdump-record-layouts %s 2> %t.layouts 2 // RUN: %clang_cc1 -w -fdump-record-layouts-simple %s > %t.before 2>&1 3 // RUN: %clang_cc1 -w -DPACKED= -DALIGNED16= -fdump-record-layouts-simple -foverride-record-layout=%t.layouts %s > %t.after 2>&1 4 // RUN: diff %t.before %t.after 5 // RUN: FileCheck %s < %t.after 6 7 // If not explicitly disabled, set PACKED to the packed attribute. 8 #ifndef PACKED 9 # define PACKED __attribute__((packed)) 10 #endif 11 12 // If not explicitly disabled, set ALIGNED16 to 16-byte alignment. 13 #ifndef ALIGNED16 14 # define ALIGNED16 __attribute__((aligned(16))) 15 #endif 16 17 // CHECK: Type: struct X0 18 struct X0 { 19 int x[6] PACKED; 20 }; 21 22 // CHECK: Type: struct X1 23 struct X1 { 24 char x[13]; 25 struct X0 y; 26 } PACKED; 27 28 // CHECK: Type: struct X2 29 struct PACKED X2 { 30 short x; 31 int y; 32 }; 33 34 // CHECK: Type: struct X3 35 struct X3 { 36 short x PACKED; 37 int y; 38 }; 39 40 #pragma pack(push,2) 41 // CHECK: Type: struct X4 42 struct X4 { 43 int x; 44 int y; 45 }; 46 #pragma pack(pop) 47 48 // CHECK: Type: struct X5 49 struct PACKED X5 { double a[19]; signed char b; }; 50 51 // CHECK: Type: struct X6 52 struct PACKED X6 { long double a; char b; }; 53 54 // CHECK: Type: struct X7 55 struct X7 { 56 unsigned x; 57 unsigned char y; 58 } PACKED; 59 60 // CHECK: Type: union X8 61 union X8 { 62 struct X7 x; 63 unsigned y; 64 } PACKED; 65 66 // CHECK: Type: struct X9 67 struct X9 { 68 unsigned int x[2] PACKED; 69 unsigned int y; 70 unsigned int z PACKED; 71 }; 72 73 // CHECK: Type: struct X10 74 struct X10 { 75 unsigned int x[2] PACKED; 76 unsigned int y PACKED; 77 unsigned int z PACKED; 78 }; 79 80 // CHECK: Type: struct X11 81 struct PACKED X11 { 82 unsigned int x[2]; 83 unsigned int y; 84 unsigned int z; 85 }; 86 87 // CHECK: Type: struct X12 88 struct PACKED X12 { 89 int x : 24; 90 }; 91 92 // CHECK: Type: struct X13 93 struct PACKED X13 { 94 signed x : 10; 95 signed y : 10; 96 }; 97 98 // CHECK: Type: union X14 99 union PACKED X14 { 100 unsigned long long x : 3; 101 }; 102 103 // CHECK: Type: struct X15 104 struct X15 { 105 unsigned x : 16; 106 unsigned y : 28 PACKED; 107 }; 108 109 // CHECK: Type: struct X16 110 struct ALIGNED16 X16 { 111 int a, b, c; 112 int x : 5; 113 int y : 29; 114 }; 115 use_structs()116void use_structs() { 117 struct X0 x0; 118 x0.x[5] = sizeof(struct X0); 119 120 struct X1 x1; 121 x1.x[5] = sizeof(struct X1); 122 123 struct X2 x2; 124 x2.y = sizeof(struct X2); 125 126 struct X3 x3; 127 x3.y = sizeof(struct X3); 128 129 struct X4 x4; 130 x4.y = sizeof(struct X4); 131 132 struct X5 x5; 133 x5.b = sizeof(struct X5); 134 135 struct X6 x6; 136 x6.b = sizeof(struct X6); 137 138 struct X7 x7; 139 typedef int X7array[sizeof(struct X7)]; 140 x7.x = sizeof(struct X7); 141 x7.y = x7.x; 142 143 union X8 x8; 144 typedef int X8array[sizeof(union X8)]; 145 x8.y = sizeof(union X8); 146 x8.x.x = x8.y; 147 148 struct X9 x9; 149 typedef int X9array[sizeof(struct X9)]; 150 x9.y = sizeof(struct X9); 151 152 struct X10 x10; 153 typedef int X10array[sizeof(struct X10)]; 154 x10.y = sizeof(struct X10); 155 156 struct X11 x11; 157 typedef int X11array[sizeof(struct X11)]; 158 x11.y = sizeof(struct X11); 159 160 struct X12 x12; 161 x12.x = sizeof(struct X12); 162 163 struct X13 x13; 164 x13.x = sizeof(struct X13); 165 166 union X14 x14; 167 x14.x = sizeof(union X14); 168 169 struct X15 x15; 170 x15.x = sizeof(struct X15); 171 172 struct X16 x16; 173 x16.x = sizeof(struct X16); 174 } 175