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/* { dg-do run } */
/* { dg-options "-O2" } */
extern void abort (void);
struct S
{
int w, x, y, z;
};
struct T
{
int r;
struct S s;
};
struct S bar (struct S x, struct S *y)
{
y->w = 4;
return *y;
}
void
foo (int a, struct T b)
{
struct S x;
struct S *c = &x;
if (a)
c = &b.s;
b.s.w = 3;
/* This call should be marked as clobbering 'x' and 'b'. */
*c = bar (*c, c);
if (b.s.w == 3)
abort ();
}
float Y;
struct S bar1 (struct S x, struct S y)
{
Y = 4;
return x;
}
void
foo1 (int a, struct T b)
{
struct S x;
struct S *c = &x;
float z, *k = &z;
if (a)
c = &b.s;
b.s.w = 3;
/* This call should NOT be marked as clobbering 'x' and 'b'. */
x = bar1 (*c, *c);
if (b.s.w != 3)
link_error ();
}
int main ()
{
struct T b;
foo (3, b);
foo1 (3, b);
return 0;
}
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