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