| Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1 | // RUN: %clang_cc1 -fsyntax-only -verify -Wtautological-compare %s |
| 2 | |
| 3 | #define mydefine 2 |
| 4 | |
| 5 | void f(int x) { |
| 6 | if ((8 & x) == 3) {} // expected-warning {{bitwise comparison always evaluates to false}} |
| 7 | if ((x & 8) == 4) {} // expected-warning {{bitwise comparison always evaluates to false}} |
| 8 | if ((x & 8) != 4) {} // expected-warning {{bitwise comparison always evaluates to true}} |
| 9 | if ((2 & x) != 4) {} // expected-warning {{bitwise comparison always evaluates to true}} |
| 10 | if ((x | 4) == 3) {} // expected-warning {{bitwise comparison always evaluates to false}} |
| 11 | if ((x | 3) != 4) {} // expected-warning {{bitwise comparison always evaluates to true}} |
| 12 | if ((5 | x) != 3) {} // expected-warning {{bitwise comparison always evaluates to true}} |
| 13 | if ((x & 0x15) == 0x13) {} // expected-warning {{bitwise comparison always evaluates to false}} |
| 14 | if ((0x23 | x) == 0x155){} // expected-warning {{bitwise comparison always evaluates to false}} |
| 15 | |
| 16 | if ((x & 8) == 8) {} |
| 17 | if ((x & 8) != 8) {} |
| 18 | if ((x | 4) == 4) {} |
| 19 | if ((x | 4) != 4) {} |
| 20 | |
| 21 | if ((x & 9) == 8) {} |
| 22 | if ((x & 9) != 8) {} |
| 23 | if ((x | 4) == 5) {} |
| 24 | if ((x | 4) != 5) {} |
| 25 | |
| 26 | if ((x & mydefine) == 8) {} |
| 27 | if ((x | mydefine) == 4) {} |
| 28 | } |