gcc/libmudflap/testsuite/libmudflap.c/pass54-frag.c

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struct k
{
struct {
int b;
int c;
} a;
};
static struct k l;
static struct k m;
void foo ()
{
/* This should not be instrumented. */
l.a.b = 5;
}
void bar ()
{
/* This should not be instrumented. */
m.a.b = 5;
}
int main ()
{
/* Force TREE_ADDRESSABLE on "l" only. */
volatile int *k = & l.a.c;
*k = 8;
__mf_set_options ("-mode-violate");
foo ();
bar ();
__mf_set_options ("-mode-check");
}