1 /* PR middle-end/36902 Array bound warning with dead code after optimization */
2 /* { dg-do compile } */
3 /* { dg-options "-O2 -Warray-bounds -Wall -Wextra" } */
4 typedef unsigned char __u8;
5 typedef unsigned short __u16;
6
7 static inline unsigned char *
foo(unsigned char * to,const unsigned char * from,int n)8 foo(unsigned char * to, const unsigned char * from, int n)
9 {
10 switch ( n )
11 {
12 case 3:
13 *to = *from;
14 break;
15 case 5:
16 to[4] = from [4];
17 break;
18 }
19 return to;
20 }
21
22 struct {
23 int size_of_select;
24 unsigned char pcr_select[4];
25 } sel;
26
bar(void)27 int bar(void)
28 {
29 static unsigned char buf[64];
30
31 sel.size_of_select = 3;
32 foo(buf, sel.pcr_select, sel.size_of_select);
33
34 return 1;
35 }
36
37
38 static inline unsigned char *
foo2(unsigned char * to,const unsigned char * from,int n)39 foo2(unsigned char * to, const unsigned char * from, int n)
40 {
41 switch ( n )
42 {
43 case 3:
44 *to = *from;
45 break;
46 case 5:
47 to[4] = from [4]; /* { dg-warning "\\\[-Warray-bounds" } */
48 break;
49 }
50 return to;
51 }
52
baz(void)53 int baz(void)
54 {
55 static unsigned char buf[64];
56
57 sel.size_of_select = 5;
58 foo2(buf, sel.pcr_select, sel.size_of_select);
59
60 return 1;
61 }
62