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 // rdar://8823265
   3
   4 #pragma pack(1)
   5 struct _one_ms {
   6         short m:9;      // size is 2
   7         int q:27;       // size is 6
   8         short w:13;     // size is 8
   9         short e:3;      // size is 8
  10         char r:4;       // size is 9
  11         char t:7;       // size is 10
  12         short y:16;     // size is 12
  13         short u:1;      // size is 14
  14         char i:2;       // size is 15
  15         int a;          // size is 19
  16         char o:6;       // size is 20
  17         char s:2;       // size is 20
  18         short d:10;     // size is 22
  19         short f:4;      // size is 22
  20         char b;         // size is 23
  21         char g:1;       // size is 24
  22         short h:13;     // size is 26
  23         char j:8;       // size is 27
  24         char k:5;       // size is 28
  25         char c;         // size is 29
  26         int l:28;       // size is 33
  27         char z:7;       // size is 34
  28         int x:20;       // size is 38
  29 } __attribute__((__ms_struct__));
  30 typedef struct _one_ms one_ms;
  31
  32 static int a1[(sizeof(one_ms) == 38) - 1];
  33
  34 #pragma pack(2)
  35 struct _two_ms {
  36         short m:9;
  37         int q:27;
  38         short w:13;
  39         short e:3;
  40         char r:4;
  41         char t:7;
  42         short y:16;
  43         short u:1;
  44         char i:2;
  45         int a;
  46         char o:6;
  47         char s:2;
  48         short d:10;
  49         short f:4;
  50         char b;
  51         char g:1;
  52         short h:13;
  53         char j:8;
  54         char k:5;
  55         char c;
  56         int l:28;
  57         char z:7;
  58         int x:20;
  59 } __attribute__((__ms_struct__));
  60
  61 typedef struct _two_ms two_ms;
  62
  63 static int a2[(sizeof(two_ms) == 42) - 1];
  64
  65 #pragma pack(4)
  66 struct _four_ms {
  67         short m:9;
  68         int q:27;
  69         short w:13;
  70         short e:3;
  71         char r:4;
  72         char t:7;
  73         short y:16;
  74         short u:1;
  75         char i:2;
  76         int a;
  77         char o:6;
  78         char s:2;
  79         short d:10;
  80         short f:4;
  81         char b;
  82         char g:1;
  83         short h:13;
  84         char j:8;
  85         char k:5;
  86         char c;
  87         int l:28;
  88         char z:7;
  89         int x:20;
  90 } __attribute__((__ms_struct__));
  91 typedef struct _four_ms four_ms;
  92
  93 static int a4[(sizeof(four_ms) == 48) - 1];
  94
  95 #pragma pack(8)
  96 struct _eight_ms {
  97         short m:9;
  98         int q:27;
  99         short w:13;
 100         short e:3;
 101         char r:4;
 102         char t:7;
 103         short y:16;
 104         short u:1;
 105         char i:2;
 106         int a;
 107         char o:6;
 108         char s:2;
 109         short d:10;
 110         short f:4;
 111         char b;
 112         char g:1;
 113         short h:13;
 114         char j:8;
 115         char k:5;
 116         char c;
 117         int l:28;
 118         char z:7;
 119         int x:20;
 120 } __attribute__((__ms_struct__));
 121
 122 typedef struct _eight_ms eight_ms;
 123
 124 static int a8[(sizeof(eight_ms) == 48) - 1];
 125
 126 // rdar://15926990
 127 #pragma pack(2)
 128 struct test0 {
 129   unsigned long a : 8;
 130   unsigned long b : 8;
 131   unsigned long c : 8;
 132   unsigned long d : 10;
 133   unsigned long e : 1;
 134 } __attribute__((__ms_struct__));
 135
 136 // CHECK:             0 | struct test0
 137 // CHECK-NEXT:    0:0-7 |   unsigned long a
 138 // CHECK-NEXT:    1:0-7 |   unsigned long b
 139 // CHECK-NEXT:    2:0-7 |   unsigned long c
 140 // CHECK-NEXT:    4:0-9 |   unsigned long d
 141 // CHECK-NEXT:    5:2-2 |   unsigned long e
 142 // CHECK-NEXT:          | [sizeof=8, align=2]
 143
 144 static int test0[(sizeof(struct test0) == 8) ? 1 : -1];