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/* PR tree-optimization/33136 */
/* { dg-do run } */
/* { dg-options "-O2" } */
extern void abort (void);
struct S
{
void *a;
int b;
int *c;
};
static int d, e;
static struct S s;
static int *
__attribute__((noinline, const))
foo (void)
{
return &s.b;
}
int *
__attribute__((noinline))
bar (int **f)
{
s.c = &d;
*f = &e;
/* As nothing ever takes the address of any int * field in struct S,
the write to *f can't alias with the s.c field. */
return s.c;
}
int
__attribute__((noinline))
baz (int *x)
{
s.b = 1;
*x = 4;
/* Function foo takes address of an int field in struct S,
so *x can alias with the s.b field (and it does in this testcase). */
return s.b;
}
int
__attribute__((noinline))
t (void)
{
int *f = (int *) 0;
return 10 * (bar (&f) != &d) + baz (foo ());
}
int
main (void)
{
if (t () != 4)
abort ();
return 0;
}
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