80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/* { dg-do compile } */
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/* { dg-require-weak "" } */
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/* { dg-options "-Waddress" } */
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/* Warning when addr convert to bool always gives known result.
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Ada/Pascal programmers sometimes write 0-param functions without
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(), and might as well warn on variables, too. */
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int func (void);
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extern int var;
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int weak_func (void) __attribute__ ((weak));
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extern int weak_var __attribute__ ((weak));
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int
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test_func_cmp (void)
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{
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if (func) /* { dg-warning "the address of 'func'" } */
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return 1;
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if (!func) /* { dg-warning "the address of 'func'" } */
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return 1;
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if (&var) /* { dg-warning "the address of 'var'" } */
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return 1;
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if (!&var) /* { dg-warning "the address of 'var'" } */
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return 1;
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if (weak_func)
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return 1;
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if (!weak_func)
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return 1;
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if (&weak_var)
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return 1;
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if (!&weak_var)
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return 1;
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return 0;
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}
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/* Test equality with 0 on the right hand side. */
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int
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test_func_cmp_rhs_zero (void)
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{
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if (func == 0) /* { dg-warning "the comparison will always evaluate as 'false'" } */
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return 1;
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if (func != 0) /* { dg-warning "the comparison will always evaluate as 'true'" } */
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return 1;
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if (&var == 0) /* { dg-warning "the comparison will always evaluate as 'false'" } */
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return 1;
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if (&var != 0) /* { dg-warning "the comparison will always evaluate as 'true'" } */
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return 1;
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if (weak_func == 0)
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return 1;
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if (weak_func != 0)
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return 1;
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if (&weak_var == 0)
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return 1;
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if (&weak_var != 0)
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return 1;
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return 0;
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}
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/* Test equality with 0 on the left hand side. */
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int
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test_func_cmp_lhs_zero (void)
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{
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if (0 == func) /* { dg-warning "the comparison will always evaluate as 'false'" } */
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return 1;
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if (0 != func) /* { dg-warning "the comparison will always evaluate as 'true'" } */
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return 1;
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if (0 == &var) /* { dg-warning "the comparison will always evaluate as 'false'" } */
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return 1;
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if (0 != &var) /* { dg-warning "the comparison will always evaluate as 'true'" } */
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return 1;
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if (0 == weak_func)
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return 1;
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if (0 != weak_func)
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return 1;
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if (0 == &weak_var)
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return 1;
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if (0 != &weak_var)
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return 1;
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return 0;
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}
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