1/* { dg-do compile } */
2/* { dg-options "-O3 -fno-optimize-sibling-calls" } */
3
4extern int use_data (void *p_01, void *p_02, void *p_03, void *p_04, void *p_05,
5		     void *p_06, void *p_07, void *p_08, void *p_09, void *p_10,
6		     void *p_11, void *p_12, void *p_13, void *p_14, void *p_15,
7		     void *p_16, void *p_17, void *p_18, void *p_19, void *p_20,
8		     void *p_21, void *p_22, void *p_23, void *p_24, void *p_25,
9		     void *p_26, void *p_27, void *p_28, void *p_29,
10		     void *p_30);
11
12extern int idx (int i, int j, int n);
13
14struct stuff
15{
16  int decision;
17  int *a, *b, *c;
18  int res;
19};
20
21
22#define some_large_stuff(stuff, n) { \
23  int i, j, k; \
24  for (i = 0; i < n; i++) \
25    for (j = 0; j < n; j++) \
26      { \
27	int v = stuff->c[idx(i, j, n)]; \
28	for (k = 0; k < n; k++) \
29	  v += stuff->a[idx(i, k, n)] * stuff->b[idx(k,j,n)]; \
30	stuff->c[idx(i, j, n)] = v; \
31      } \
32}
33
34#define recursion if (iter > 0) \
35    foo (stuff, iter - 1, (void *) -1, p_01, p_02, p_03, p_04, p_05, p_06, \
36      p_07, p_08, p_09, p_10, p_11, p_12, p_13, p_14, p_15, p_16, p_17, \
37     p_18, p_19, p_20, p_21, p_22, p_23, p_24, p_25, p_26, p_27, p_28, p_29); \
38    else \
39      foo (stuff, iter, p_01, p_02, p_03, p_04, p_05, p_06, p_07, p_08, p_09, \
40	p_10, p_11, p_12, p_13, p_14, p_15, p_16, p_17, p_18, p_19, p_20, \
41        p_21,p_22, p_23, p_24, p_25, p_26, p_27, p_28, p_29, p_30)
42
43void
44foo (struct stuff *stuff,
45     int iter,
46     void *p_01, void *p_02, void *p_03, void *p_04, void *p_05,
47     void *p_06, void *p_07, void *p_08, void *p_09, void *p_10,
48     void *p_11, void *p_12, void *p_13, void *p_14, void *p_15,
49     void *p_16, void *p_17, void *p_18, void *p_19, void *p_20,
50     void *p_21, void *p_22, void *p_23, void *p_24, void *p_25,
51     void *p_26, void *p_27, void *p_28, void *p_29, void *p_30)
52{
53 switch (stuff->decision)
54   {
55   case 0:
56     some_large_stuff (stuff, 83);
57     stuff->res =
58       use_data (p_01, p_02, p_03, p_04, p_05, p_06, p_07, p_08, p_09, p_10,
59		 p_11, p_12, p_13, p_14, p_15, p_16, p_17, p_18, p_19, p_20,
60		 p_21, p_22, p_23, p_24, p_25, p_26, p_27, p_28, p_29, p_30);
61     recursion;
62     break;
63
64   case 1:
65     some_large_stuff (stuff, 25);
66     stuff->res =
67       use_data (p_11, p_02, p_03, p_04, p_05, p_06, p_07, p_08, p_09, p_10,
68		 p_21, p_12, p_13, p_14, p_15, p_16, p_17, p_18, p_19, p_20,
69		 p_01, p_22, p_23, p_24, p_25, p_26, p_27, p_28, p_29, p_30);
70     recursion;
71     break;
72
73   case 3:
74     some_large_stuff (stuff, 139);
75     stuff->res =
76       use_data (p_01, p_12, p_03, p_04, p_05, p_06, p_07, p_08, p_09, p_10,
77		 p_11, p_22, p_13, p_14, p_15, p_16, p_17, p_18, p_19, p_20,
78		 p_21, p_02, p_23, p_24, p_25, p_26, p_27, p_28, p_29, p_30);
79     recursion;
80     break;
81
82   case 4:
83     some_large_stuff (stuff, 32);
84     stuff->res =
85       use_data (p_01, p_02, p_13, p_04, p_05, p_06, p_07, p_08, p_09, p_10,
86		 p_11, p_12, p_23, p_14, p_15, p_16, p_17, p_18, p_19, p_20,
87		 p_21, p_22, p_03, p_24, p_25, p_26, p_27, p_28, p_29, p_30);
88     recursion;
89     break;
90
91   case 5:
92     some_large_stuff (stuff, 205);
93     stuff->res =
94       use_data (p_01, p_02, p_03, p_04, p_15, p_06, p_07, p_08, p_09, p_10,
95		 p_11, p_12, p_13, p_14, p_25, p_16, p_17, p_18, p_19, p_20,
96		 p_21, p_22, p_23, p_24, p_05, p_26, p_27, p_28, p_29, p_30);
97     recursion;
98     break;
99
100   case 6:
101     some_large_stuff (stuff, 64);
102     stuff->res =
103       use_data (p_01, p_02, p_03, p_04, p_05, p_16, p_07, p_08, p_09, p_10,
104		 p_11, p_12, p_13, p_14, p_15, p_26, p_17, p_18, p_19, p_20,
105		 p_21, p_22, p_23, p_24, p_25, p_06, p_27, p_28, p_29, p_30);
106     recursion;
107     break;
108   }
109}
110
111#define NULL (void *)0
112
113void
114bar (struct stuff *stuff, int iter)
115{
116  foo (stuff, iter, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
117       NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
118       NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
119}
120