1 /* Spurious uninitialized variable warnings.  Slight variant on the
2    documented case, inspired by reg-stack.c:record_asm_reg_life.  */
3 
4 /* { dg-do compile } */
5 /* { dg-options "-O -Wuninitialized" } */
6 
7 struct foo
8 {
9     int type;
10     struct foo *car;
11     struct foo *cdr;
12     char *data;
13     int data2;
14 };
15 
16 extern void use(struct foo *);
17 
18 #define CLOBBER 6
19 #define PARALLEL 3
20 
21 void
func(struct foo * list,int count)22 func(struct foo *list, int count)
23 {
24     int n_clobbers = 0;
25     int i;
26     struct foo **clob_list;   /* { dg-bogus "clob_list" "uninitialized variable warning" } */
27 
28     if(list[0].type == PARALLEL)
29     {
30 	clob_list = __builtin_alloca(count * sizeof(struct foo *));
31 
32 	for(i = 1; i < count; i++)
33 	{
34 	    if(list[i].type == CLOBBER)
35 		clob_list[n_clobbers++] = &list[i];
36 	}
37     }
38 
39     for(i = 0; i < n_clobbers; i++)
40 	use(clob_list[i]);
41 }
42