1 /* PRs target/15569, rtl-optimization/15681 */
2 /* { dg-do compile } */
3 /* { dg-options "-Os -frename-registers" } */
4 /* { dg-options "-mconstant-gp -Os -frename-registers" { target ia64-*-* } } */
5
6 struct S { struct S *a, *b; };
7 struct T { struct S e; unsigned long a; int b, c; void *d; } f;
8
9 unsigned long f1 (unsigned long);
10 void f2 (int, struct T *);
11 void *f3 (void *);
12 unsigned long volatile g;
13
14 static void
f4(struct T * p)15 f4 (struct T *p)
16 {
17 f1 (f1 (((unsigned long) g - p->a) >> 20));
18 }
19
20 static struct T *
f5(void)21 f5 (void)
22 {
23 struct T *g, *p;
24 struct T *q = 0;
25 for (g = p = &f; (g = p = (struct T *) (g->e.a)) != &f;)
26 if (p->b)
27 {
28 f4 (p);
29 if (p->c & 0x80000)
30 return p;
31 }
32 return q;
33 }
34
35 static void
f6(struct T * p)36 f6 (struct T *p)
37 {
38 f2 (9, p);
39 }
40
41 static inline void *
f7(struct T * t)42 f7 (struct T *t)
43 {
44 void *d;
45 d = t->d;
46 if (d)
47 d = f3 (d);
48 return d;
49 }
50
51 static void *
f8(struct T * p)52 f8 (struct T *p)
53 {
54 void *d = f7 (p);
55 if (!d)
56 return 0;
57 f6 (p);
58 return d;
59 }
60
61 static void
f9(void)62 f9 (void)
63 {
64 struct T *p;
65 p = f5 ();
66 f8 (p);
67 }
68
69 void
test(void)70 test (void)
71 {
72 f9 ();
73 }
74