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// RUN: %clang_analyze_cc1 -analyzer-checker=core \
// RUN: -analyzer-output=text \
// RUN: -verify %s
namespace test_tracking_of_lhs_multiplier {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = p0 * y; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_lhs_multiplier
namespace test_tracking_of_rhs_multiplier {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = y * p0; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_rhs_multiplier
namespace test_tracking_of_nested_multiplier {
int f(int x, int y, int z) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = y*z*p0; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_nested_multiplier
namespace test_tracking_through_multiple_stmts {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}}
bool p1 = p0 ? 0 : 1; // expected-note {{'p0' is false}} \
// expected-note {{'?' condition is false}}
bool p2 = 1 - p1; // expected-note {{'p2' initialized to 0}}
int div = p2 * y; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_through_multiple_stmts
namespace test_tracking_both_lhs_and_rhs {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
bool p1 = y < 0; // expected-note {{Assuming 'y' is >= 0}} \
// expected-note {{'p1' initialized to 0}}
int div = p0 * p1; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_both_lhs_and_rhs
namespace test_tracking_of_multiplier_and_parens {
int f(int x, int y, int z) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = y*(z*p0); // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_multiplier_and_parens
namespace test_tracking_of_divisible {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = p0 / y; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_divisible
namespace test_tracking_of_modulo {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = p0 % y; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_modulo
namespace test_tracking_of_assignment {
int f(int x) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = 1;
div *= p0; // expected-note {{The value 0 is assigned to 'div'}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_assignment
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