Viewing file:  builtin-has-attribute.c (1.33 KB) -rw-r--r--
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/* Verify that defining a type in __builtin_has_attribute triggers
the expected -Wc++-compat warning and evaluates as expected.
Also verify that the expression in __builtin_has_attribute is
not evaluated.
{ dg-do compile }
{ dg-options "-O2 -Wall -Wc++-compat -fdump-tree-optimized -ftrack-macro-expansion=0" } */
#define ATTR(list) __attribute__ (list)
#define A(expect, sym, attr) \
typedef int Assert [1 - 2 * !(__builtin_has_attribute (sym, attr) == expect)]
#define assert(expr) \
((expr) \
? (void)0 \
: (__builtin_printf ("Assertion failed on line %i: %s\n", \
__LINE__, #expr), \
++nfails))
A (0, struct A { int i; }, aligned); /* { dg-warning "expression is invalid in C\\\+\\\+" } */
A (1, struct ATTR ((aligned)) B { int i; }, aligned); /* { dg-warning "expression is invalid in C\\\+\\\+" } */
static int f (void)
{
__builtin_abort ();
}
int main (void)
{
int n = 0, nfails = 0;
assert (0 == __builtin_has_attribute (int[n++], aligned));
assert (1 == __builtin_has_attribute (ATTR ((aligned)) int[n++], aligned));
assert (1 == __builtin_has_attribute (ATTR ((aligned)) int[f ()], aligned));
assert (1 == 1);
if (n)
__builtin_abort ();
if (nfails)
__builtin_abort ();
return 0;
}
/* { dg-final { scan-tree-dump-times "abort" 0 "optimized" } } */
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