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
|
// RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=core,alpha.core,debug.ExprInspection -verify %s
void clang_analyzer_eval(bool);
struct X0 { };
bool operator==(const X0&, const X0&);
// PR7287
struct test { int a[2]; };
void t2() {
test p = {{1,2}};
test q;
q = p;
}
bool PR7287(X0 a, X0 b) {
return operator==(a, b);
}
// Inlining non-static member operators mistakenly treated 'this' as the first
// argument for a while.
struct IntComparable {
bool operator==(int x) const {
return x == 0;
}
};
void testMemberOperator(IntComparable B) {
clang_analyzer_eval(B == 0); // expected-warning{{TRUE}}
}
namespace UserDefinedConversions {
class Convertible {
public:
operator int() const {
return 42;
}
operator bool() const {
return true;
}
};
void test(const Convertible &obj) {
clang_analyzer_eval((int)obj == 42); // expected-warning{{TRUE}}
clang_analyzer_eval(obj); // expected-warning{{TRUE}}
}
}
namespace RValues {
struct SmallOpaque {
float x;
int operator +() const {
return (int)x;
}
};
struct LargeOpaque {
float x[4];
int operator +() const {
return (int)x[0];
}
};
SmallOpaque getSmallOpaque() {
SmallOpaque obj;
obj.x = 1.0;
return obj;
}
LargeOpaque getLargeOpaque() {
LargeOpaque obj = LargeOpaque();
obj.x[0] = 1.0;
return obj;
}
void test(int coin) {
// Force a cache-out when we try to conjure a temporary region for the operator call.
// ...then, don't crash.
clang_analyzer_eval(+(coin ? getSmallOpaque() : getSmallOpaque())); // expected-warning{{UNKNOWN}}
clang_analyzer_eval(+(coin ? getLargeOpaque() : getLargeOpaque())); // expected-warning{{UNKNOWN}}
}
}
namespace SynthesizedAssignment {
struct A {
int a;
A& operator=(A& other) { a = -other.a; return *this; }
A& operator=(A&& other) { a = other.a+1; return *this; }
};
struct B {
int x;
A a[3];
B& operator=(B&) = default;
B& operator=(B&&) = default;
};
// This used to produce a warning about the iteration variable in the
// synthesized assignment operator being undefined.
void testNoWarning() {
B v, u;
u = v;
}
void testNoWarningMove() {
B v, u;
u = static_cast<B &&>(v);
}
void testConsistency() {
B v, u;
v.a[1].a = 47;
v.a[2].a = 42;
u = v;
clang_analyzer_eval(u.a[1].a == -47); // expected-warning{{TRUE}}
clang_analyzer_eval(u.a[2].a == -42); // expected-warning{{TRUE}}
}
void testConsistencyMove() {
B v, u;
v.a[1].a = 47;
v.a[2].a = 42;
u = static_cast<B &&>(v);
clang_analyzer_eval(u.a[1].a == 48); // expected-warning{{TRUE}}
clang_analyzer_eval(u.a[2].a == 43); // expected-warning{{TRUE}}
}
}
|
