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 } 29
