| George Karpenkov | baa78cc | 2018-08-22 23:17:25 +0000 | [diff] [blame] | 1 | // RUN: %clang_analyze_cc1 -x c++ -analyzer-checker=core -analyzer-output=text -verify %s |
| 2 | |
| 3 | typedef unsigned char uint8_t; |
| 4 | |
| 5 | #define UINT8_MAX 255 |
| 6 | #define TCP_MAXWIN 65535 |
| 7 | |
| 8 | uint8_t get_uint8_max() { |
| 9 | uint8_t rcvscale = UINT8_MAX; // expected-note{{'rcvscale' initialized to 255}} |
| 10 | return rcvscale; // expected-note{{Returning the value 255 (loaded from 'rcvscale')}} |
| 11 | } |
| 12 | |
| 13 | void shift_by_undefined_value() { |
| 14 | uint8_t shift_amount = get_uint8_max(); // expected-note{{'shift_amount' initialized to 255}} |
| 15 | // expected-note@-1{{Calling 'get_uint8_max'}} |
| 16 | // expected-note@-2{{Returning from 'get_uint8_max'}} |
| 17 | (void)(TCP_MAXWIN << shift_amount); // expected-warning{{The result of the left shift is undefined due to shifting by '255', which is greater or equal to the width of type 'int'}} |
| 18 | // expected-note@-1{{The result of the left shift is undefined due to shifting by '255', which is greater or equal to the width of type 'int'}} |
| 19 | } |