1 // RUN: %clang_cc1 -std=c++1z -fsyntax-only -verify %s
2 // RUN: %clang_cc1 -std=c++03 -fsyntax-only -verify %s
3 // RUN: %clang_cc1 -std=c++03 -faligned-allocation -fsyntax-only -verify %s
4 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
5 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify -fsized-deallocation %s
6 
7 #if !__has_builtin(__builtin_operator_new) || !__has_builtin(__builtin_operator_delete)
8 #error builtins should always be available
9 #endif
10 
11 #if __has_builtin(__builtin_operator_new) != 201802L || \
12     __has_builtin(__builtin_operator_delete) != 201802L
13 #error builtin should report updated value
14 #endif
15 
16 typedef __SIZE_TYPE__ size_t;
17 namespace std {
18   struct nothrow_t {};
19 #if __cplusplus >= 201103L
20 enum class align_val_t : size_t {};
21 #else
22   enum align_val_t {
23   // We can't force an underlying type when targeting windows.
24 # ifndef _WIN32
25     __zero = 0, __max = (size_t)-1
26 # endif
27   };
28 #endif
29 }
30 std::nothrow_t nothrow;
31 
32 void *operator new(size_t); // expected-note 1+ {{candidate function}}
33 void operator delete(void *); // expected-note 1+ {{candidate function}}
34 
35 // Declare the reserved placement operators.
36 void *operator new(size_t, void*) throw(); // expected-note 1+ {{candidate function}}
37 void operator delete(void *, void *)throw(); // expected-note 1+ {{candidate function}}
38 void *operator new[](size_t, void*) throw();
39 void operator delete[](void*, void*) throw();
40 
41 // Declare the replaceable global allocation operators.
42 void *operator new(size_t, const std::nothrow_t &) throw(); // expected-note 1+ {{candidate function}}
43 void *operator new[](size_t, const std::nothrow_t &) throw();
44 void operator delete(void *, const std::nothrow_t &)throw(); // expected-note 1+ {{candidate function}}
45 void operator delete[](void *, const std::nothrow_t &) throw();
46 
47 // aligned allocation and deallocation functions.
48 void* operator new  ( size_t count, std::align_val_t al); // expected-note 1+ {{candidate function}}
49 void operator delete(void *, std::align_val_t); // expected-note 1+ {{candidate}}
50 #ifndef __cpp_aligned_new
51 // expected-note@-3 1+ {{non-usual 'operator new' declared here}}
52 // expected-note@-3 1+ {{non-usual 'operator delete' declared here}}
53 #endif
54 void *operator new[](size_t count, std::align_val_t al);
55 void operator delete[](void*, std::align_val_t);
56 
57 void operator delete(void *, size_t); // expected-note 1+ {{candidate}}
58 #ifndef __cpp_sized_deallocation
59 // expected-note@-2 1+ {{non-usual 'operator delete' declared here}}
60 #endif
61 void operator delete[](void*, size_t);
62 
63 // Declare some other placemenet operators.
64 void *operator new(size_t, void*, bool) throw(); // expected-note 1+ {{candidate function}}
65 void *operator new[](size_t, void*, bool) throw();
66 
67 void *NP = 0;
68 
69 void test_typo_in_args() {
70   __builtin_operator_new(DNE);          // expected-error {{undeclared identifier 'DNE'}}
71   __builtin_operator_new(DNE, DNE2);    // expected-error {{undeclared identifier 'DNE'}} expected-error {{'DNE2'}}
72   __builtin_operator_delete(DNE);       // expected-error {{'DNE'}}
73   __builtin_operator_delete(DNE, DNE2); // expected-error {{'DNE'}} expected-error {{'DNE2'}}
74 }
75 
76 void test_arg_types() {
77   __builtin_operator_new(NP);                      // expected-error {{no matching function for call to 'operator new'}}
78   __builtin_operator_new(NP, std::align_val_t(0)); // expected-error {{no matching function for call to 'operator new'}}}
79 }
80 void test_return_type() {
81   int w = __builtin_operator_new(42);        // expected-error {{cannot initialize a variable of type 'int' with an rvalue of type 'void *'}}
82   int y = __builtin_operator_delete(NP);     // expected-error {{cannot initialize a variable of type 'int' with an rvalue of type 'void'}}
83 }
84 
85 void test_aligned_new() {
86 #ifdef __cpp_aligned_new
87   void *p = __builtin_operator_new(42, std::align_val_t(2));
88   __builtin_operator_delete(p, std::align_val_t(2));
89 #else
90   // FIXME: We've manually declared the aligned new/delete overloads,
91   // but LangOpts::AlignedAllocation is false. Should our overloads be considered
92   // usual allocation/deallocation functions?
93   void *p = __builtin_operator_new(42, std::align_val_t(2)); // expected-error {{call to '__builtin_operator_new' selects non-usual allocation function}}
94   __builtin_operator_delete(p, std::align_val_t(2));         // expected-error {{call to '__builtin_operator_delete' selects non-usual deallocation function}}
95 #endif
96 }
97 
98 void test_sized_delete() {
99 #ifdef __cpp_sized_deallocation
100   __builtin_operator_delete(NP, 4);
101 #else
102   __builtin_operator_delete(NP, 4); // expected-error {{call to '__builtin_operator_delete' selects non-usual deallocation function}}
103 #endif
104 }
105 
106 void *operator new(size_t, bool);   // expected-note 1+ {{candidate}}
107 // expected-note@-1 {{non-usual 'operator new' declared here}}
108 void operator delete(void *, bool); // expected-note 1+ {{candidate}}
109 // expected-note@-1 {{non-usual 'operator delete' declared here}}
110 
111 void test_non_usual() {
112   __builtin_operator_new(42, true);     // expected-error {{call to '__builtin_operator_new' selects non-usual allocation function}}
113   __builtin_operator_delete(NP, false); // expected-error {{call to '__builtin_operator_delete' selects non-usual deallocation function}}
114 }
115 
116 template <int ID>
117 struct Tag {};
118 struct ConvertsToTypes {
119   operator std::align_val_t() const;
120   operator Tag<0>() const;
121 };
122 
123 void *operator new(size_t, Tag<0>);   // expected-note 0+ {{candidate}}
124 void operator delete(void *, Tag<0>); // expected-note 0+ {{candidate}}
125 
126 void test_ambiguous() {
127 #ifdef __cpp_aligned_new
128   ConvertsToTypes cvt;
129   __builtin_operator_new(42, cvt);    // expected-error {{call to 'operator new' is ambiguous}}
130   __builtin_operator_delete(NP, cvt); // expected-error {{call to 'operator delete' is ambiguous}}
131 #endif
132 }
133 
134 void test_no_args() {
135   __builtin_operator_new();    // expected-error {{no matching function for call to 'operator new'}}
136   __builtin_operator_delete(); // expected-error {{no matching function for call to 'operator delete'}}
137 }
138 
139 void test_no_matching_fn() {
140   Tag<1> tag;
141   __builtin_operator_new(42, tag);    // expected-error {{no matching function for call to 'operator new'}}
142   __builtin_operator_delete(NP, tag); // expected-error {{no matching function for call to 'operator delete'}}
143 }
144 
145 template <class Tp, class Up, class RetT>
146 void test_dependent_call(Tp new_arg, Up delete_arg, RetT) {
147   RetT ret = __builtin_operator_new(new_arg);
148   __builtin_operator_delete(delete_arg);
149 }
150 template void test_dependent_call(int, int*, void*);
151 
152 void test_const_attribute() {
153   __builtin_operator_new(42); // expected-warning {{ignoring return value of function declared with const attribute}}
154 #ifdef __cpp_aligned_new
155   __builtin_operator_new(42, std::align_val_t(8)); // expected-warning {{ignoring return value of function declared with const attribute}}
156 #endif
157 }
158