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