clang/test/CodeGen/ms_struct-pack.c

   1 // RUN: %clang_cc1 -emit-llvm-only  -triple i386-apple-darwin9 -fdump-record-layouts %s | FileCheck %s
   2
   3 #pragma pack(1)
   4 struct _one_ms {
   5         short m:9;      // size is 2
   6         int q:27;       // size is 6
   7         short w:13;     // size is 8
   8         short e:3;      // size is 8
   9         char r:4;       // size is 9
  10         char t:7;       // size is 10
  11         short y:16;     // size is 12
  12         short u:1;      // size is 14
  13         char i:2;       // size is 15
  14         int a;          // size is 19
  15         char o:6;       // size is 20
  16         char s:2;       // size is 20
  17         short d:10;     // size is 22
  18         short f:4;      // size is 22
  19         char b;         // size is 23
  20         char g:1;       // size is 24
  21         short h:13;     // size is 26
  22         char j:8;       // size is 27
  23         char k:5;       // size is 28
  24         char c;         // size is 29
  25         int l:28;       // size is 33
  26         char z:7;       // size is 34
  27         int x:20;       // size is 38
  28 } __attribute__((__ms_struct__));
  29 typedef struct _one_ms one_ms;
  30
  31 static int a1[(sizeof(one_ms) == 38) - 1];
  32
  33 #pragma pack(2)
  34 struct _two_ms {
  35         short m:9;
  36         int q:27;
  37         short w:13;
  38         short e:3;
  39         char r:4;
  40         char t:7;
  41         short y:16;
  42         short u:1;
  43         char i:2;
  44         int a;
  45         char o:6;
  46         char s:2;
  47         short d:10;
  48         short f:4;
  49         char b;
  50         char g:1;
  51         short h:13;
  52         char j:8;
  53         char k:5;
  54         char c;
  55         int l:28;
  56         char z:7;
  57         int x:20;
  58 } __attribute__((__ms_struct__));
  59
  60 typedef struct _two_ms two_ms;
  61
  62 static int a2[(sizeof(two_ms) == 42) - 1];
  63
  64 #pragma pack(4)
  65 struct _four_ms {
  66         short m:9;
  67         int q:27;
  68         short w:13;
  69         short e:3;
  70         char r:4;
  71         char t:7;
  72         short y:16;
  73         short u:1;
  74         char i:2;
  75         int a;
  76         char o:6;
  77         char s:2;
  78         short d:10;
  79         short f:4;
  80         char b;
  81         char g:1;
  82         short h:13;
  83         char j:8;
  84         char k:5;
  85         char c;
  86         int l:28;
  87         char z:7;
  88         int x:20;
  89 } __attribute__((__ms_struct__));
  90 typedef struct _four_ms four_ms;
  91
  92 static int a4[(sizeof(four_ms) == 48) - 1];
  93
  94 #pragma pack(8)
  95 struct _eight_ms {
  96         short m:9;
  97         int q:27;
  98         short w:13;
  99         short e:3;
 100         char r:4;
 101         char t:7;
 102         short y:16;
 103         short u:1;
 104         char i:2;
 105         int a;
 106         char o:6;
 107         char s:2;
 108         short d:10;
 109         short f:4;
 110         char b;
 111         char g:1;
 112         short h:13;
 113         char j:8;
 114         char k:5;
 115         char c;
 116         int l:28;
 117         char z:7;
 118         int x:20;
 119 } __attribute__((__ms_struct__));
 120
 121 typedef struct _eight_ms eight_ms;
 122
 123 static int a8[(sizeof(eight_ms) == 48) - 1];
 124
 125 #pragma pack(2)
 126 struct test0 {
 127   unsigned long a : 8;
 128   unsigned long b : 8;
 129   unsigned long c : 8;
 130   unsigned long d : 10;
 131   unsigned long e : 1;
 132 } __attribute__((__ms_struct__));
 133
 134 // CHECK:             0 | struct test0
 135 // CHECK-NEXT:    0:0-7 |   unsigned long a
 136 // CHECK-NEXT:    1:0-7 |   unsigned long b
 137 // CHECK-NEXT:    2:0-7 |   unsigned long c
 138 // CHECK-NEXT:    4:0-9 |   unsigned long d
 139 // CHECK-NEXT:    5:2-2 |   unsigned long e
 140 // CHECK-NEXT:          | [sizeof=8, align=2]
 141
 142 static int test0[(sizeof(struct test0) == 8) ? 1 : -1];