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// RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=core,alpha.core,debug.ExprInspection -analyzer-output=text -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}}
// expected-note@-1{{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}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(obj); // expected-warning{{TRUE}}
// expected-note@-1{{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}}
// expected-note@-1{{Assuming 'coin' is 0}}
// expected-note@-2{{'?' condition is false}}
// expected-note@-3{{UNKNOWN}}
// expected-note@-4{{Assuming 'coin' is 0}}
// expected-note@-5{{'?' condition is false}}
clang_analyzer_eval(+(coin ? getLargeOpaque() : getLargeOpaque())); // expected-warning{{UNKNOWN}}
// expected-note@-1{{'coin' is 0}}
// expected-note@-2{{'?' condition is false}}
// expected-note@-3{{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.
//
// Note: The warning we want to avoid can be found in https://bugs.llvm.org/show_bug.cgi?id=16745.
// Back in the day, this function was created we couldn't evaluate non-POD type array construction,
// so we couldn't evaluate the copy assignment either, hence we didn't detect that a field is
// uninitialized.
void testNoWarning() {
B v, u;
u = v; // expected-warning@110{{Assigned value is garbage or undefined}}
// expected-note@-1{{Calling defaulted copy assignment operator for 'B'}}
// expected-note@110{{Assigned value is garbage or undefined}}
}
void testNoWarningMove() {
B v, u;
u = static_cast<B &&>(v); // expected-warning@111{{Assigned value is garbage or undefined}}
// expected-note@-1{{Calling defaulted move assignment operator for 'B'}}
// expected-note@111{{Assigned value is garbage or undefined}}
}
void testConsistency() {
B v, u;
v.x = 0;
v.a[0].a = 24;
v.a[1].a = 47;
v.a[2].a = 42;
u = v;
clang_analyzer_eval(u.a[0].a == -24); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(u.a[1].a == -47); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(u.a[2].a == -42); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
}
void testConsistencyMove() {
B v, u;
v.x = 0;
v.a[0].a = 24;
v.a[1].a = 47;
v.a[2].a = 42;
u = static_cast<B &&>(v);
clang_analyzer_eval(u.a[0].a == 25); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(u.a[1].a == 48); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
clang_analyzer_eval(u.a[2].a == 43); // expected-warning{{TRUE}}
// expected-note@-1{{TRUE}}
}
}
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