clang/test/CodeGen/ms_struct-bitfield.c

   1 // RUN: %clang_cc1 -emit-llvm -o - -triple x86_64-apple-darwin9 %s | FileCheck %s
   2 // RUN: %clang_cc1 -emit-llvm -o - -triple thumbv7-apple-ios -target-abi apcs-gnu %s | FileCheck %s -check-prefix=CHECK-ARM
   3
   4 // rdar://8823265
   5
   6 // Note that we're declaring global variables with these types,
   7 // triggering both Sema and IRGen struct layout.
   8
   9 #define ATTR __attribute__((__ms_struct__))
  10
  11 struct
  12 {
  13    char foo;
  14    long : 0;
  15    char bar;
  16 } ATTR t1;
  17 int s1 = sizeof(t1);
  18 // CHECK: @s1 ={{.*}} global i32 2
  19 // CHECK-ARM: @s1 ={{.*}} global i32 2
  20
  21 struct
  22 {
  23    char foo;
  24    long : 0;
  25    char : 0;
  26    int : 0;
  27    char bar;
  28 } ATTR t2;
  29 int s2 = sizeof(t2);
  30 // CHECK: @s2 ={{.*}} global i32 2
  31 // CHECK-ARM: @s2 ={{.*}} global i32 2
  32
  33 struct
  34 {
  35    char foo;
  36    long : 0;
  37    char : 0;
  38    int : 0;
  39    char bar;
  40    long : 0;
  41    char : 0;
  42 } ATTR t3;
  43 int s3 = sizeof(t3);
  44 // CHECK: @s3 ={{.*}} global i32 2
  45 // CHECK-ARM: @s3 ={{.*}} global i32 2
  46
  47 struct
  48 {
  49    long : 0;
  50    char bar;
  51 } ATTR t4;
  52 int s4 = sizeof(t4);
  53 // CHECK: @s4 ={{.*}} global i32 1
  54 // CHECK-ARM: @s4 ={{.*}} global i32 1
  55
  56 struct
  57 {
  58    long : 0;
  59    long : 0;
  60    char : 0;
  61    char bar;
  62 } ATTR t5;
  63 int s5 = sizeof(t5);
  64 // CHECK: @s5 ={{.*}} global i32 1
  65 // CHECK-ARM: @s5 ={{.*}} global i32 1
  66
  67 struct
  68 {
  69    long : 0;
  70    long : 0;
  71    char : 0;
  72    char bar;
  73 } ATTR t6;
  74 int s6 = sizeof(t6);
  75 // CHECK: @s6 ={{.*}} global i32 1
  76 // CHECK-ARM: @s6 ={{.*}} global i32 1
  77
  78 struct
  79 {
  80    char foo;
  81    long : 0;
  82    int : 0;
  83    char bar;
  84    char bar1;
  85    long : 0;
  86    char bar2;
  87    char bar3;
  88    char : 0;
  89    char bar4;
  90    char bar5;
  91    char : 0;
  92    char bar6;
  93    char bar7;
  94 } ATTR t7;
  95 int s7 = sizeof(t7);
  96 // CHECK: @s7 ={{.*}} global i32 9
  97 // CHECK-ARM: @s7 ={{.*}} global i32 9
  98
  99 struct
 100 {
 101    long : 0;
 102    long : 0;
 103    char : 0;
 104 } ATTR t8;
 105 int s8 = sizeof(t8);
 106 // CHECK: @s8 ={{.*}} global i32 0
 107 // CHECK-ARM: @s8 ={{.*}} global i32 0
 108
 109 struct
 110 {
 111    char foo;
 112    long : 0;
 113    int : 0;
 114    char bar;
 115    char bar1;
 116    long : 0;
 117    char bar2;
 118    char bar3;
 119    char : 0;
 120    char bar4;
 121    char bar5;
 122    char : 0;
 123    char bar6;
 124    char bar7;
 125    int  i1;
 126    char : 0;
 127    long : 0;
 128    char :4;
 129    char bar8;
 130    char : 0;
 131    char bar9;
 132    char bar10;
 133    int  i2;
 134    char : 0;
 135    long : 0;
 136    char :4;
 137 } ATTR t9;
 138 int s9 = sizeof(t9);
 139 // CHECK: @s9 ={{.*}} global i32 28
 140 // CHECK-ARM: @s9 ={{.*}} global i32 28
 141
 142 struct
 143 {
 144    char foo: 8;
 145    long : 0;
 146    char bar;
 147 } ATTR t10;
 148 int s10 = sizeof(t10);
 149 // CHECK: @s10 ={{.*}} global i32 16
 150 // CHECK-ARM: @s10 ={{.*}} global i32 8
 151
 152 // rdar://16041826 - ensure that ms_structs work correctly on a
 153 // !useBitFieldTypeAlignment() target
 154 struct {
 155   unsigned int a : 31;
 156   unsigned int b : 2;
 157   unsigned int c;
 158 } ATTR t11;
 159 int s11 = sizeof(t11);
 160 // CHECK: @s11 ={{.*}} global i32 12
 161 // CHECK-ARM: @s11 ={{.*}} global i32 12
 162
 163 struct {
 164   unsigned char a : 3;
 165   unsigned char b : 4;
 166   unsigned short c : 6;
 167 } ATTR t12;
 168 int s12 = sizeof(t12);
 169 // CHECK: @s12 ={{.*}} global i32 4
 170 // CHECK-ARM: @s12 ={{.*}} global i32 4
 171
 172 struct {
 173   unsigned char a : 3;
 174   unsigned char b : 4;
 175   __attribute__((packed)) unsigned short c : 6;
 176 } ATTR t13;
 177 int s13 = sizeof(t13);
 178 // CHECK: @s13 ={{.*}} global i32 4
 179 // CHECK-ARM: @s13 ={{.*}} global i32 4