1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
| // RUN: %clang_cc1 %s -fsyntax-only -verify -std=c++11 -fcxx-exceptions
// RUN: %clang_cc1 %s -fsyntax-only -verify -std=c++1z -fcxx-exceptions
typedef const struct __CFString * CFStringRef;
#define CFSTR __builtin___CFStringMakeConstantString
void f() {
(void)CFStringRef(CFSTR("Hello"));
}
void a() { __builtin_va_list x, y; ::__builtin_va_copy(x, y); }
// <rdar://problem/10063539>
template<int (*Compare)(const char *s1, const char *s2)>
int equal(const char *s1, const char *s2) {
return Compare(s1, s2) == 0;
}
// FIXME: Our error recovery here sucks
template int equal<&__builtin_strcmp>(const char*, const char*); // expected-error {{builtin functions must be directly called}} expected-error {{expected unqualified-id}} expected-error {{expected ')'}} expected-note {{to match this '('}}
// PR13195
void f2() {
__builtin_isnan; // expected-error {{builtin functions must be directly called}}
}
// pr14895
typedef __typeof(sizeof(int)) size_t;
extern "C" void *__builtin_alloca (size_t);
namespace addressof {
struct S {} s;
static_assert(__builtin_addressof(s) == &s, "");
struct T { constexpr T *operator&() const { return nullptr; } int n; } t;
constexpr T *pt = __builtin_addressof(t);
static_assert(&pt->n == &t.n, "");
struct U { int n : 5; } u;
int *pbf = __builtin_addressof(u.n); // expected-error {{address of bit-field requested}}
S *ptmp = __builtin_addressof(S{}); // expected-error {{taking the address of a temporary}}
}
void no_ms_builtins() {
__assume(1); // expected-error {{use of undeclared}}
__noop(1); // expected-error {{use of undeclared}}
__debugbreak(); // expected-error {{use of undeclared}}
}
struct FILE;
extern "C" int vfprintf(FILE *__restrict, const char *__restrict,
__builtin_va_list va);
void synchronize_args() {
__sync_synchronize(0); // expected-error {{too many arguments}}
}
namespace test_launder {
#define TEST_TYPE(Ptr, Type) \
static_assert(__is_same(decltype(__builtin_launder(Ptr)), Type), "expected same type")
struct Dummy {};
using FnType = int(char);
using MemFnType = int (Dummy::*)(char);
using ConstMemFnType = int (Dummy::*)() const;
void foo() {}
void test_builtin_launder_diags(void *vp, const void *cvp, FnType *fnp,
MemFnType mfp, ConstMemFnType cmfp, int (&Arr)[5]) {
__builtin_launder(vp); // expected-error {{void pointer argument to '__builtin_launder' is not allowed}}
__builtin_launder(cvp); // expected-error {{void pointer argument to '__builtin_launder' is not allowed}}
__builtin_launder(fnp); // expected-error {{function pointer argument to '__builtin_launder' is not allowed}}
__builtin_launder(mfp); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}}
__builtin_launder(cmfp); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}}
(void)__builtin_launder(&fnp);
__builtin_launder(42); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}}
__builtin_launder(nullptr); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}}
__builtin_launder(foo); // expected-error {{function pointer argument to '__builtin_launder' is not allowed}}
(void)__builtin_launder(Arr);
}
void test_builtin_launder(char *p, const volatile int *ip, const float *&fp,
double *__restrict dp) {
int x;
__builtin_launder(x); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}}
TEST_TYPE(p, char*);
TEST_TYPE(ip, const volatile int*);
TEST_TYPE(fp, const float*);
TEST_TYPE(dp, double *__restrict);
char *d = __builtin_launder(p);
const volatile int *id = __builtin_launder(ip);
int *id2 = __builtin_launder(ip); // expected-error {{cannot initialize a variable of type 'int *' with an rvalue of type 'const volatile int *'}}
const float* fd = __builtin_launder(fp);
}
void test_launder_return_type(const int (&ArrayRef)[101], int (&MArrRef)[42][13],
void (**&FuncPtrRef)()) {
TEST_TYPE(ArrayRef, const int *);
TEST_TYPE(MArrRef, int(*)[13]);
TEST_TYPE(FuncPtrRef, void (**)());
}
template <class Tp>
constexpr Tp *test_constexpr_launder(Tp *tp) {
return __builtin_launder(tp);
}
constexpr int const_int = 42;
constexpr int const_int2 = 101;
constexpr const int *const_ptr = test_constexpr_launder(&const_int);
static_assert(&const_int == const_ptr, "");
static_assert(const_ptr != test_constexpr_launder(&const_int2), "");
void test_non_constexpr() {
constexpr int i = 42; // expected-note {{declared here}}
constexpr const int *ip = __builtin_launder(&i); // expected-error {{constexpr variable 'ip' must be initialized by a constant expression}}
// expected-note@-1 {{pointer to 'i' is not a constant expression}}
}
constexpr bool test_in_constexpr(const int &i) {
return (__builtin_launder(&i) == &i);
}
static_assert(test_in_constexpr(const_int), "");
void f() {
constexpr int i = 42;
static_assert(test_in_constexpr(i), "");
}
struct Incomplete; // expected-note {{forward declaration}}
struct IncompleteMember {
Incomplete &i;
};
void test_incomplete(Incomplete *i, IncompleteMember *im) {
// expected-error@+1 {{incomplete type 'test_launder::Incomplete' where a complete type is required}}
__builtin_launder(i);
__builtin_launder(&i); // OK
__builtin_launder(im); // OK
}
void test_noexcept(int *i) {
static_assert(noexcept(__builtin_launder(i)), "");
}
#undef TEST_TYPE
} // end namespace test_launder
|