| 1 | // RUN: %clang_cc1 %s -fsyntax-only -verify -std=c++11 -fcxx-exceptions |
| 2 | // RUN: %clang_cc1 %s -fsyntax-only -verify -std=c++1z -fcxx-exceptions |
| 3 | typedef const struct __CFString * CFStringRef; |
| 4 | #define CFSTR __builtin___CFStringMakeConstantString |
| 5 | |
| 6 | void f() { |
| 7 | (void)CFStringRef(CFSTR("Hello")); |
| 8 | } |
| 9 | |
| 10 | void a() { __builtin_va_list x, y; ::__builtin_va_copy(x, y); } |
| 11 | |
| 12 | // <rdar://problem/10063539> |
| 13 | template<int (*Compare)(const char *s1, const char *s2)> |
| 14 | int equal(const char *s1, const char *s2) { |
| 15 | return Compare(s1, s2) == 0; |
| 16 | } |
| 17 | // FIXME: Our error recovery here sucks |
| 18 | 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 '('}} |
| 19 | |
| 20 | // PR13195 |
| 21 | void f2() { |
| 22 | __builtin_isnan; // expected-error {{builtin functions must be directly called}} |
| 23 | } |
| 24 | |
| 25 | // pr14895 |
| 26 | typedef __typeof(sizeof(int)) size_t; |
| 27 | extern "C" void *__builtin_alloca (size_t); |
| 28 | |
| 29 | namespace addressof { |
| 30 | struct S {} s; |
| 31 | static_assert(__builtin_addressof(s) == &s, ""); |
| 32 | |
| 33 | struct T { constexpr T *operator&() const { return nullptr; } int n; } t; |
| 34 | constexpr T *pt = __builtin_addressof(t); |
| 35 | static_assert(&pt->n == &t.n, ""); |
| 36 | |
| 37 | struct U { int n : 5; } u; |
| 38 | int *pbf = __builtin_addressof(u.n); // expected-error {{address of bit-field requested}} |
| 39 | |
| 40 | S *ptmp = __builtin_addressof(S{}); // expected-error {{taking the address of a temporary}} |
| 41 | } |
| 42 | |
| 43 | void no_ms_builtins() { |
| 44 | __assume(1); // expected-error {{use of undeclared}} |
| 45 | __noop(1); // expected-error {{use of undeclared}} |
| 46 | __debugbreak(); // expected-error {{use of undeclared}} |
| 47 | } |
| 48 | |
| 49 | struct FILE; |
| 50 | extern "C" int vfprintf(FILE *__restrict, const char *__restrict, |
| 51 | __builtin_va_list va); |
| 52 | |
| 53 | void synchronize_args() { |
| 54 | __sync_synchronize(0); // expected-error {{too many arguments}} |
| 55 | } |
| 56 | |
| 57 | namespace test_launder { |
| 58 | #define TEST_TYPE(Ptr, Type) \ |
| 59 | static_assert(__is_same(decltype(__builtin_launder(Ptr)), Type), "expected same type") |
| 60 | |
| 61 | struct Dummy {}; |
| 62 | |
| 63 | using FnType = int(char); |
| 64 | using MemFnType = int (Dummy::*)(char); |
| 65 | using ConstMemFnType = int (Dummy::*)() const; |
| 66 | |
| 67 | void foo() {} |
| 68 | |
| 69 | void test_builtin_launder_diags(void *vp, const void *cvp, FnType *fnp, |
| 70 | MemFnType mfp, ConstMemFnType cmfp, int (&Arr)[5]) { |
| 71 | __builtin_launder(vp); // expected-error {{void pointer argument to '__builtin_launder' is not allowed}} |
| 72 | __builtin_launder(cvp); // expected-error {{void pointer argument to '__builtin_launder' is not allowed}} |
| 73 | __builtin_launder(fnp); // expected-error {{function pointer argument to '__builtin_launder' is not allowed}} |
| 74 | __builtin_launder(mfp); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}} |
| 75 | __builtin_launder(cmfp); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}} |
| 76 | (void)__builtin_launder(&fnp); |
| 77 | __builtin_launder(42); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}} |
| 78 | __builtin_launder(nullptr); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}} |
| 79 | __builtin_launder(foo); // expected-error {{function pointer argument to '__builtin_launder' is not allowed}} |
| 80 | (void)__builtin_launder(Arr); |
| 81 | } |
| 82 | |
| 83 | void test_builtin_launder(char *p, const volatile int *ip, const float *&fp, |
| 84 | double *__restrict dp) { |
| 85 | int x; |
| 86 | __builtin_launder(x); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}} |
| 87 | |
| 88 | TEST_TYPE(p, char*); |
| 89 | TEST_TYPE(ip, const volatile int*); |
| 90 | TEST_TYPE(fp, const float*); |
| 91 | TEST_TYPE(dp, double *__restrict); |
| 92 | |
| 93 | char *d = __builtin_launder(p); |
| 94 | const volatile int *id = __builtin_launder(ip); |
| 95 | int *id2 = __builtin_launder(ip); // expected-error {{cannot initialize a variable of type 'int *' with an rvalue of type 'const volatile int *'}} |
| 96 | const float* fd = __builtin_launder(fp); |
| 97 | } |
| 98 | |
| 99 | void test_launder_return_type(const int (&ArrayRef)[101], int (&MArrRef)[42][13], |
| 100 | void (**&FuncPtrRef)()) { |
| 101 | TEST_TYPE(ArrayRef, const int *); |
| 102 | TEST_TYPE(MArrRef, int(*)[13]); |
| 103 | TEST_TYPE(FuncPtrRef, void (**)()); |
| 104 | } |
| 105 | |
| 106 | template <class Tp> |
| 107 | constexpr Tp *test_constexpr_launder(Tp *tp) { |
| 108 | return __builtin_launder(tp); |
| 109 | } |
| 110 | constexpr int const_int = 42; |
| 111 | constexpr int const_int2 = 101; |
| 112 | constexpr const int *const_ptr = test_constexpr_launder(&const_int); |
| 113 | static_assert(&const_int == const_ptr, ""); |
| 114 | static_assert(const_ptr != test_constexpr_launder(&const_int2), ""); |
| 115 | |
| 116 | void test_non_constexpr() { |
| 117 | constexpr int i = 42; // expected-note {{declared here}} |
| 118 | constexpr const int *ip = __builtin_launder(&i); // expected-error {{constexpr variable 'ip' must be initialized by a constant expression}} |
| 119 | // expected-note@-1 {{pointer to 'i' is not a constant expression}} |
| 120 | } |
| 121 | |
| 122 | constexpr bool test_in_constexpr(const int &i) { |
| 123 | return (__builtin_launder(&i) == &i); |
| 124 | } |
| 125 | |
| 126 | static_assert(test_in_constexpr(const_int), ""); |
| 127 | void f() { |
| 128 | constexpr int i = 42; |
| 129 | static_assert(test_in_constexpr(i), ""); |
| 130 | } |
| 131 | |
| 132 | struct Incomplete; // expected-note {{forward declaration}} |
| 133 | struct IncompleteMember { |
| 134 | Incomplete &i; |
| 135 | }; |
| 136 | void test_incomplete(Incomplete *i, IncompleteMember *im) { |
| 137 | // expected-error@+1 {{incomplete type 'test_launder::Incomplete' where a complete type is required}} |
| 138 | __builtin_launder(i); |
| 139 | __builtin_launder(&i); // OK |
| 140 | __builtin_launder(im); // OK |
| 141 | } |
| 142 | |
| 143 | void test_noexcept(int *i) { |
| 144 | static_assert(noexcept(__builtin_launder(i)), ""); |
| 145 | } |
| 146 | #undef TEST_TYPE |
| 147 | } // end namespace test_launder |
| 148 | |