blob: 70fa35464c11badc601b9cec2f0c7beb8149ad0c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/* { dg-do run } */
/* { dg-require-effective-target nonpic } */
/* { dg-require-weak "" } */
/* { dg-require-alias "" } */
/* { dg-options "-O2 -fdelete-null-pointer-checks" } */
/* { dg-skip-if "" { powerpc-ibm-aix* } } */
void abort (void);
extern int undef_var0, undef_var1;
extern __attribute__ ((weak)) int weak_undef_var0;
extern __attribute__ ((weak)) int weak_undef_var1;
__attribute__ ((weak)) int weak_def_var0;
int def_var0=0, def_var1=0;
static int alias_var0 __attribute__ ((alias("def_var0")));
extern int weak_alias_var0 __attribute__ ((alias("def_var0"))) __attribute__ ((weak));
void undef_fn0(void);
void undef_fn1(void);
void def_fn0(void)
{
}
void def_fn1(void)
{
}
__attribute__ ((weak))
void weak_def_fn0(void)
{
}
__attribute__ ((weak))
void weak_def_fn1(void)
{
}
__attribute__ ((weak)) void weak_undef_fn0(void);
inline
void inline_fn0(void)
{
}
inline
void inline_fn1(void)
{
}
int
main(int argc, char **argv)
{
/* Two definitions are always different unless they can be interposed. */
if (!__builtin_constant_p (def_fn0 == def_fn1))
abort();
if (def_fn0 == def_fn1)
abort();
if (!__builtin_constant_p (&def_var0 == &def_var1))
abort();
if (&def_var0 == &def_var1)
abort();
/* Same symbol is the same no matter on interposition. */
if (!__builtin_constant_p (undef_fn0 != undef_fn0))
abort ();
if (undef_fn0 != undef_fn0)
abort ();
/* Do not get confused by same offset. */
if (!__builtin_constant_p (&undef_var0 + argc != &undef_var0 + argc))
abort ();
if (&undef_var0 + argc != &undef_var0 + argc)
abort ();
/* Alias and its target is equivalent unless one of them can be interposed. */
if (!__builtin_constant_p (&def_var0 != &alias_var0))
abort ();
if (&def_var0 != &alias_var0 )
abort ();
if (__builtin_constant_p (&def_var0 != &weak_alias_var0))
abort ();
if (&def_var0 != &weak_alias_var0)
abort ();
/* Weak definitions may be both NULL. */
if (__builtin_constant_p ((void *)weak_undef_fn0 == (void *)&weak_undef_var0))
abort ();
if ((void *)weak_undef_fn0 != (void *)&weak_undef_var0)
abort ();
/* Variables and functions do not share same memory locations otherwise. */
if (!__builtin_constant_p ((void *)undef_fn0 == (void *)&undef_var0))
abort ();
if ((void *)undef_fn0 == (void *)&undef_var0)
abort ();
/* This works for cases where one object is just weakly defined, too. */
if (!__builtin_constant_p ((void *)weak_undef_fn0 == (void *)&weak_def_var0))
abort ();
if ((void *)weak_undef_fn0 == (void *)&weak_def_var0)
abort ();
/* Inline functions are known to be different. */
if (!__builtin_constant_p (inline_fn0 != inline_fn1))
abort ();
if (inline_fn0 == inline_fn1)
abort ();
return 0;
}
|
