clang/test/CodeGen/struct.c

   1 // RUN: %clang_cc1 -triple i386-unknown-unknown %s -emit-llvm -o -
   2
   3 struct  {
   4   int x;
   5   int y;
   6 } point;
   7
   8 void fn1(void) {
   9   point.x = 42;
  10 }
  11
  12 /* Nested member */
  13 struct  {
  14   struct {
  15     int a;
  16     int b;
  17   } p1;
  18 } point2;
  19
  20 void fn2(void) {
  21   point2.p1.a = 42;
  22 }
  23
  24 /* Indirect reference */
  25 typedef struct __sf {
  26  unsigned char *c;
  27  short flags;
  28 } F;
  29
  30 typedef struct __sf2 {
  31   F *ff;
  32 } F2;
  33
  34 int fn3(F2 *c) {
  35   if (c->ff->c >= 0)
  36     return 1;
  37   else
  38     return 0;
  39 }
  40
  41 /* Nested structs */
  42 typedef struct NA {
  43   int data;
  44   struct NA *next;
  45 } NA;
  46 void f1(void) {  NA a; }
  47
  48 typedef struct NB {
  49   int d1;
  50   struct _B2 {
  51     int d2;
  52     struct NB *n2;
  53   } B2;
  54 } NB;
  55
  56 void f2(void) { NB b; }
  57
  58 extern NB *f3(void);
  59 void f4(void) {
  60   f3()->d1 = 42;
  61 }
  62
  63 void f5(void) {
  64   (f3())->d1 = 42;
  65 }
  66
  67 /* Function calls */
  68 typedef struct {
  69   int location;
  70   int length;
  71 } range;
  72 extern range f6(void);
  73 void f7(void) {
  74   range r = f6();
  75 }
  76
  77 /* Member expressions */
  78 typedef struct {
  79   range range1;
  80   range range2;
  81 } rangepair;
  82
  83 void f8(void) {
  84   rangepair p;
  85
  86   range r = p.range1;
  87 }
  88
  89 void f9(range *p) {
  90   range r = *p;
  91 }
  92
  93 void f10(range *p) {
  94   range r = p[0];
  95 }
  96
  97 /* _Bool types */
  98
  99 struct _w {
 100   short a,b;
 101   short c,d;
 102   short e,f;
 103   short g;
 104
 105   unsigned int h,i;
 106
 107   _Bool j,k;
 108 } ws;
 109
 110 /* Implicit casts (due to typedefs) */
 111 typedef struct _a {
 112   int a;
 113 } a;
 114
 115 void f11(void) {
 116   struct _a a1;
 117   a a2;
 118
 119   a1 = a2;
 120   a2 = a1;
 121 }
 122
 123 /* Implicit casts (due to const) */
 124 void f12(void) {
 125   struct _a a1;
 126   const struct _a a2;
 127
 128   a1 = a2;
 129 }
 130
 131 /* struct initialization */
 132 struct a13 {int b; int c;};
 133 struct a13 c13 = {5};
 134 typedef struct a13 a13;
 135 struct a14 { short a; int b; } x = {1, 1};
 136
 137 /* flexible array members */
 138 struct a15 {char a; int b[];} c15;
 139 int a16(void) {c15.a = 1;}
 140
 141 /* compound literals */
 142 void f13(void) {
 143   a13 x; x = (a13){1,2};
 144 }
 145
 146 /* va_arg */
 147 int f14(int i, ...) {
 148   __builtin_va_list l;
 149   __builtin_va_start(l,i);
 150   a13 b = __builtin_va_arg(l, a13);
 151   int c = __builtin_va_arg(l, a13).c;
 152   return b.b;
 153 }
 154
 155 /* Attribute packed */
 156 struct __attribute__((packed)) S2839 { double a[19];  signed char b; } s2839[5];
 157
 158 struct __attribute__((packed)) SS { long double a; char b; } SS;
 159
 160
 161 /* As lvalue */
 162
 163 int f15(void) {
 164   extern range f15_ext(void);
 165   return f15_ext().location;
 166 }
 167
 168 range f16(void) {
 169   extern rangepair f16_ext(void);
 170   return f16_ext().range1;
 171 }
 172
 173 int f17(void) {
 174   extern range f17_ext(void);
 175   range r;
 176   return (r = f17_ext()).location;
 177 }
 178
 179 range f18(void) {
 180   extern rangepair f18_ext(void);
 181   rangepair rp;
 182   return (rp = f18_ext()).range1;
 183 }
 184
 185
 186
 187 // Complex forward reference of struct.
 188 struct f19S;
 189 extern struct f19T {
 190   struct f19S (*p)(void);
 191 } t;
 192 struct f19S { int i; };
 193 void f19(void) {
 194   t.p();
 195 }
 196