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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
| // RUN: %clang_cc1 %s -verify -fsyntax-only -std=gnu++98 -triple x86_64-pc-linux-gnu
// RUN: %clang_cc1 %s -verify -fsyntax-only -std=gnu++2a -triple x86_64-pc-linux-gnu
typedef unsigned long long uint64_t;
typedef unsigned int uint32_t;
// Check integer sizes.
int array64[sizeof(uint64_t) == 8 ? 1 : -1];
int array32[sizeof(uint32_t) == 4 ? 1 : -1];
int arrayint[sizeof(int) < sizeof(uint64_t) ? 1 : -1];
uint64_t f0(uint64_t);
uint64_t f1(uint64_t, uint32_t);
uint64_t f2(uint64_t, ...);
static const uint64_t overflow = 1 * 4608 * 1024 * 1024; // expected-warning {{overflow in expression; result is 536870912 with type 'int'}}
uint64_t check_integer_overflows(int i) { //expected-note 0+{{declared here}}
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
uint64_t overflow = 4608 * 1024 * 1024,
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
overflow2 = (uint64_t)(4608 * 1024 * 1024),
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
overflow3 = (uint64_t)(4608 * 1024 * 1024 * i),
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
overflow4 = (1ULL * ((4608) * ((1024) * (1024))) + 2ULL),
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
overflow5 = static_cast<uint64_t>(4608 * 1024 * 1024),
// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
multi_overflow = (uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
overflow += overflow2 = overflow3 = (uint64_t)(4608 * 1024 * 1024);
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
overflow += overflow2 = overflow3 = 4608 * 1024 * 1024;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
overflow += overflow2 = overflow3 = static_cast<uint64_t>(4608 * 1024 * 1024);
uint64_t not_overflow = 4608 * 1024 * 1024ULL;
uint64_t not_overflow2 = (1ULL * ((uint64_t)(4608) * (1024 * 1024)) + 2ULL);
// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
overflow = 4608 * 1024 * 1024 ? 4608 * 1024 * 1024 : 0;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
overflow = 0 ? 0 : 4608 * 1024 * 1024;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
if (4608 * 1024 * 1024)
return 0;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
if ((uint64_t)(4608 * 1024 * 1024))
return 1;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
if (static_cast<uint64_t>(4608 * 1024 * 1024))
return 1;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
if ((uint64_t)(4608 * 1024 * 1024))
return 2;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
if ((uint64_t)(4608 * 1024 * 1024 * i))
return 3;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
if ((1ULL * ((4608) * ((1024) * (1024))) + 2ULL))
return 4;
// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
if ((uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024)))
return 5;
#if __cplusplus < 201103L
switch (i) {
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
case 4608 * 1024 * 1024:
return 6;
// expected-warning@+1 {{overflow in expression; result is 537919488 with type 'int'}}
case (uint64_t)(4609 * 1024 * 1024):
return 7;
// expected-warning@+1 {{overflow in expression; result is 537919488 with type 'int'}}
case 1 + static_cast<uint64_t>(4609 * 1024 * 1024):
return 7;
// expected-error@+2 {{expression is not an integral constant expression}}
// expected-note@+1 {{read of non-const variable 'i' is not allowed in a constant expression}}
case ((uint64_t)(4608 * 1024 * 1024 * i)):
return 8;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
case ((1ULL * ((4608) * ((1024) * (1024))) + 2ULL)):
return 9;
// expected-warning@+2 2{{overflow in expression; result is 536870912 with type 'int'}}
// expected-warning@+1 {{overflow converting case value to switch condition type (288230376151711744 to 0)}}
case ((uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024))):
return 10;
}
#endif
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
while (4608 * 1024 * 1024);
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
while ((uint64_t)(4608 * 1024 * 1024));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
while (static_cast<uint64_t>(4608 * 1024 * 1024));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
while ((uint64_t)(4608 * 1024 * 1024));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
while ((uint64_t)(4608 * 1024 * 1024 * i));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
while ((1ULL * ((4608) * ((1024) * (1024))) + 2ULL));
// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
while ((uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024)));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
do { } while (4608 * 1024 * 1024);
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
do { } while ((uint64_t)(4608 * 1024 * 1024));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
do { } while (static_cast<uint64_t>(4608 * 1024 * 1024));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
do { } while ((uint64_t)(4608 * 1024 * 1024));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
do { } while ((uint64_t)(4608 * 1024 * 1024 * i));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
do { } while ((1ULL * ((4608) * ((1024) * (1024))) + 2ULL));
// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
do { } while ((uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024)));
// expected-warning@+3 {{overflow in expression; result is 536870912 with type 'int'}}
// expected-warning@+3 {{overflow in expression; result is 536870912 with type 'int'}}
// expected-warning@+3 {{overflow in expression; result is 536870912 with type 'int'}}
for (uint64_t i = 4608 * 1024 * 1024;
(uint64_t)(4608 * 1024 * 1024);
i += (uint64_t)(4608 * 1024 * 1024 * i));
// expected-warning@+3 {{overflow in expression; result is 536870912 with type 'int'}}
// expected-warning@+3 2{{overflow in expression; result is 536870912 with type 'int'}}
// expected-warning@+3 2{{overflow in expression; result is 536870912 with type 'int'}}
for (uint64_t i = (1ULL * ((4608) * ((1024) * (1024))) + 2ULL);
((uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024)));
i = ((4608 * 1024 * 1024) + ((uint64_t)(4608 * 1024 * 1024))));
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
_Complex long long x = 4608 * 1024 * 1024;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
(__real__ x) = 4608 * 1024 * 1024;
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
(__imag__ x) = 4608 * 1024 * 1024;
// expected-warning@+2 {{overflow in expression; result is 536870912 with type 'int'}}
uint64_t a[10];
a[4608 * 1024 * 1024] = 1;
#if __cplusplus < 201103L
// expected-warning@-2 {{array index 536870912 is past the end of the array (which contains 10 elements)}}
// expected-note@-4 {{array 'a' declared here}}
#endif
// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
return ((4608 * 1024 * 1024) + ((uint64_t)(4608 * 1024 * 1024)));
}
void check_integer_overflows_in_function_calls() {
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
(void)f0(4608 * 1024 * 1024);
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
uint64_t x = f0(4608 * 1024 * 1024);
// expected-warning@+2 {{overflow in expression; result is 536870912 with type 'int'}}
uint64_t (*f0_ptr)(uint64_t) = &f0;
(void)(*f0_ptr)(4608 * 1024 * 1024);
// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
(void)f2(0, f0(4608 * 1024 * 1024));
}
// Tests that ensure that evaluation-for-overflow of random expressions doesn't
// crash.
namespace EvaluationCrashes {
namespace VirtualCallWithVbase {
struct A {};
struct B : virtual A {
virtual bool f(const void *, int);
};
struct C : B {
bool f(const void *, int);
};
int d;
bool e(C c) {
if (c.f(&d, d)) {}
return true;
}
}
}
|