clang/test/Sema/bitfield-layout_1.c

   1 // RUN: %clang_cc1 %s -fsyntax-only -verify -triple=i686-apple-darwin9
   2 // RUN: %clang_cc1 %s -fsyntax-only -verify -triple=arm-linux-gnueabihf
   3 // RUN: %clang_cc1 %s -fsyntax-only -verify -triple=aarch64-linux-gnu
   4 // RUN: %clang_cc1 %s -fsyntax-only -verify -triple=x86_64-pc-linux-gnu
   5 // expected-no-diagnostics
   6
   7 #define CHECK_SIZE(name, size) \
   8   extern int name##_1[sizeof(name) == size ? 1 : -1];
   9
  10
  11 struct  __attribute__((packed)) {
  12   int a;
  13   int b : 4;
  14   int c : 32;
  15 } s0;
  16 CHECK_SIZE(s0,9)
  17
  18 #pragma pack (1)
  19 struct {
  20   int a;
  21   int b : 4;
  22   int c : 32;
  23 } s1;
  24 CHECK_SIZE(s1,9)
  25
  26 #pragma pack (2)
  27 struct {
  28   int a;
  29   int b : 4;
  30   int c : 32;
  31 } s2;
  32 CHECK_SIZE(s2,10)
  33
  34 #pragma pack (2)
  35 struct __attribute__((packed)) {
  36   int a;
  37   int b : 4;
  38   int c : 32;
  39 } s3;
  40 CHECK_SIZE(s3,10)
  41
  42 #pragma pack (4)
  43 struct  __attribute__((packed)) {
  44   int a;
  45   int b : 4;
  46   int c : 32;
  47 } s4;
  48 CHECK_SIZE(s4,12)
  49
  50 #pragma pack (16)
  51 struct {
  52   int a;
  53   int __attribute__((packed)) b : 4;
  54   int __attribute__((packed)) c : 32;
  55 } s41;
  56 CHECK_SIZE(s41,12)
  57
  58 #pragma pack (16)
  59 struct {
  60   int a;
  61   int b : 4;
  62   int c : 32;
  63 } s5;
  64 CHECK_SIZE(s5,12)
  65
  66 #pragma pack (1)
  67 struct  __attribute__((aligned(4))) {
  68   int a;
  69   int b : 4;
  70   int c : 32;
  71 } s6;
  72 CHECK_SIZE(s6,12)
  73
  74 #pragma pack (2)
  75 struct {
  76   char a;
  77   int b : 4;
  78   int c : 32;
  79   char s;
  80 } s7;
  81 CHECK_SIZE(s7,8)
  82
  83 #pragma pack (1)
  84 struct {
  85   char a;
  86   int b : 4;
  87   int c : 28;
  88   char s;
  89 } s8;
  90 CHECK_SIZE(s8,6)
  91
  92 #pragma pack (8)
  93 struct {
  94   char a;
  95   int b : 4;
  96   int c : 28;
  97   char s;
  98 } s9;
  99 CHECK_SIZE(s9,8)
 100
 101 #pragma pack (8)
 102 struct {
 103   char a;
 104   char s;
 105 } s10;
 106 CHECK_SIZE(s10,2)
 107
 108 #pragma pack(4)
 109 struct {
 110   char a;
 111   int b : 4;
 112   int c : 28;
 113   char s1;
 114   char s2;
 115   char s3;
 116 } s11;
 117 CHECK_SIZE(s11,8)
 118
 119 #pragma pack(4)
 120 struct {
 121   short s1;
 122   int a1 : 17;
 123   int a2 : 17;
 124   int a3 : 30;
 125   short s2;
 126 } s12;
 127 CHECK_SIZE(s12,12)
 128
 129 #pragma pack(4)
 130 struct {
 131   char c1;
 132   int i1 : 17;
 133   int i2 : 17;
 134   int i3 : 30;
 135   char c2;
 136 } s13;
 137 CHECK_SIZE(s13,12)
 138
 139 #pragma pack(2)
 140 struct {
 141   char a;
 142   int s;
 143 } s14;
 144 CHECK_SIZE(s14,6)
 145
 146 #pragma pack(4)
 147 struct {
 148   char a;
 149   short s;
 150 } s15;
 151 CHECK_SIZE(s15,4)
 152
 153 #pragma pack(2)
 154 struct {
 155   char a;
 156   int b : 4;
 157   int c : 28;
 158   char s1;
 159   char s2;
 160   char s3;
 161 } s16;
 162 CHECK_SIZE(s16,8)
 163
 164 #pragma pack (16)
 165 struct {
 166   int __attribute__((packed)) a;
 167   int __attribute__((packed)) b : 4;
 168   int __attribute__((packed)) c : 32;
 169 } s17;
 170 CHECK_SIZE(s17,12)
 171
 172 #pragma pack (16)
 173 struct {
 174   int __attribute__((aligned(8))) a;
 175   int __attribute__((aligned(8))) b : 4;
 176   int __attribute__((aligned(8))) c : 32;
 177 } s18;
 178 CHECK_SIZE(s18,24)
 179
 180 #pragma pack (16)
 181 struct {
 182   int __attribute__((aligned(1))) a;
 183   int __attribute__((aligned(1))) b : 4;
 184   int __attribute__((aligned(1))) c : 32;
 185 } s19;
 186 CHECK_SIZE(s19,12)
 187
 188 #pragma pack (1)
 189 struct  __attribute__((aligned(8))) {
 190   int a;
 191   int b : 4;
 192   int c : 32;
 193 } s20;
 194 CHECK_SIZE(s20,16)
 195
 196 #pragma pack (2)
 197 struct {
 198   int __attribute__((aligned(8))) a;
 199   int __attribute__((aligned(8))) b : 4;
 200   int __attribute__((aligned(8))) c : 32;
 201 } s21;
 202 CHECK_SIZE(s21,10)