clang/test/Sema/expr-address-of.c

   1 // RUN: %clang_cc1 %s -verify -fsyntax-only -Wno-strict-prototypes
   2 struct xx { int bitf:1; };
   3
   4 struct entry { struct xx *whatever;
   5                int value;
   6                int bitf:1; };
   7 void add_one(int *p) { (*p)++; }
   8
   9 void test(void) {
  10  register struct entry *p;
  11  add_one(&p->value);
  12  struct entry pvalue;
  13  add_one(&p->bitf);  // expected-error {{address of bit-field requested}}
  14  add_one(&pvalue.bitf); // expected-error {{address of bit-field requested}}
  15  add_one(&p->whatever->bitf); // expected-error {{address of bit-field requested}}
  16 }
  17
  18 void foo(void) {
  19   register int x[10];
  20   &x[10];              // expected-error {{address of register variable requested}}
  21
  22   register int *y;
  23
  24   int *x2 = &y; // expected-error {{address of register variable requested}}
  25   int *x3 = &y[10];
  26 }
  27
  28 void testVectorComponentAccess(void) {
  29   typedef float v4sf __attribute__ ((vector_size (16)));
  30   static v4sf q;
  31   float* r = &q[0]; // expected-error {{address of vector element requested}}
  32 }
  33
  34 typedef __attribute__(( ext_vector_type(4) ))  float float4;
  35
  36 float *testExtVectorComponentAccess(float4 x) {
  37   return &x.w; // expected-error {{address of vector element requested}}
  38 }
  39
  40 void f0(void) {
  41   register int *x0;
  42   int *_dummy0 = &(*x0);
  43
  44   register int *x1;
  45   int *_dummy1 = &(*(x1 + 1));
  46 }
  47
  48 void f1(void) {
  49   register int x0[10];
  50   int *_dummy00 = x0;     // expected-error {{address of register variable requested}}
  51   int *_dummy01 = &(*x0); // expected-error {{address of register variable requested}}
  52
  53   register int x1[10];
  54   int *_dummy1 = &(*(x1 + 1)); // expected-error {{address of register variable requested}}
  55
  56   register int *x2;
  57   int *_dummy2 = &(*(x2 + 1));
  58
  59   register int x3[10][10][10];
  60   int(*_dummy3)[10] = &x3[0][0]; // expected-error {{address of register variable requested}}
  61
  62   register struct { int f0[10]; } x4;
  63   int *_dummy4 = &x4.f0[2]; // expected-error {{address of register variable requested}}
  64
  65   add_one(x0);      // expected-error {{address of register variable requested}}
  66   (void)sizeof(x0); // OK, not an array decay.
  67
  68   int *p = ((int *)x0)++; // expected-error {{address of register variable requested}}
  69 }
  70
  71 void f2(void) {
  72   register int *y;
  73
  74   int *_dummy0 = &y; // expected-error {{address of register variable requested}}
  75   int *_dummy1 = &y[10];
  76 }
  77
  78 void f3(void) {
  79   extern void f4(void);
  80   void (*_dummy0)(void) = &****f4;
  81 }
  82
  83 void f4(void) {
  84   register _Complex int x;
  85
  86   int *_dummy0 = &__real__ x; // expected-error {{address of register variable requested}}
  87 }
  88
  89 void f5(void) {
  90   register int arr[2];
  91
  92   int *_dummy0 = &(int*) arr; // expected-error {{address of register variable requested}}
  93   int *_dummy1 = &(arr + 1); // expected-error {{address of register variable requested}}
  94 }
  95
  96 void f6(register int x) {
  97   int * dummy0 = &x; // expected-error {{address of register variable requested}}
  98 }
  99
 100 char* f7(void) {
 101   register struct {char* x;} t1 = {"Hello"};
 102   char* dummy1 = &(t1.x[0]);
 103
 104   struct {int a : 10; struct{int b : 10;};} t2;
 105   int* dummy2 = &(t2.a); // expected-error {{address of bit-field requested}}
 106   int* dummy3 = &(t2.b); // expected-error {{address of bit-field requested}}
 107
 108   void* t3 = &(*(void*)0);
 109 }
 110
 111 void f8(void) {
 112   void *dummy0 = &f8(); // expected-error {{cannot take the address of an rvalue of type 'void'}}
 113
 114   extern void v;
 115   void *dummy1 = &(1 ? v : f8()); // expected-error {{cannot take the address of an rvalue of type 'void'}}
 116
 117   void *dummy2 = &(f8(), v); // expected-error {{cannot take the address of an rvalue of type 'void'}}
 118
 119   void *dummy3 = &({ ; }); // expected-error {{cannot take the address of an rvalue of type 'void'}}
 120 }
 121
 122 void f9(void) {
 123   extern void knr();
 124   void (*_dummy0)() = &****knr;
 125 }