43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
/* { dg-do compile } */
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/* { dg-options "-Wtautological-compare -fdiagnostics-show-caret" } */
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#define FOO foo
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void
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fn1 (int foo)
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{
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if (foo == foo); /* { dg-warning "self-comparison always evaluates to true" } */
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/* { dg-begin-multiline-output "" }
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if (foo == foo);
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^~
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{ dg-end-multiline-output "" { target c } } */
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/* { dg-begin-multiline-output "" }
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if (foo == foo);
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~~~ ^~ ~~~
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{ dg-end-multiline-output "" { target c++ } } */
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}
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void
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fn2 (int foo)
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{
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if (FOO == FOO); /* { dg-warning "self-comparison always evaluates to true" } */
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/* { dg-begin-multiline-output "" }
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if (FOO == FOO);
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^~
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{ dg-end-multiline-output "" } */
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}
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void
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fn3 (int foo)
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{
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if ((foo & 16) == 10); /* { dg-warning "bitwise comparison always evaluates to false" } */
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/* { dg-begin-multiline-output "" }
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if ((foo & 16) == 10);
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^~
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{ dg-end-multiline-output "" { target c } } */
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/* { dg-begin-multiline-output "" }
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if ((foo & 16) == 10);
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~~~~~~~~~~ ^~ ~~
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{ dg-end-multiline-output "" { target c++ } } */
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}
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