1 // { dg-do link }
2 // { dg-skip-if "" { "powerpc-ibm-aix*" } { "*" } { "" } }
3 // { dg-require-alias "" }
4 // { dg-options "-O2 -fno-common" }
5 
6 // Copyright 2005 Free Software Foundation, Inc.
7 // Contributed by Alexandre Oliva <aoliva@redhat.com>
8 
9 // PR middle-end/24295
10 
11 // The unit-at-a-time call graph code used to fail to emit variables
12 // without external linkage that were only used indirectly, through
13 // aliases.  Although the PR above is about #pragma weak-introduced
14 // aliases, the underlying machinery is the same.
15 
16 #ifndef ATTRIBUTE_USED
17 # define ATTRIBUTE_USED __attribute__((used))
18 #endif
19 
20 static int lv1;
21 extern int Av1a __attribute__((alias ("lv1")));
22 int *pv1a = &Av1a;
23 
24 static int lv2;
25 extern int Av2a __attribute__((alias ("lv2")));
26 int *pv2a = &lv2;
27 
28 static int lv3;
29 extern int Av3a __attribute__((alias ("lv3")));
30 static int *pv3a ATTRIBUTE_USED = &Av3a;
31 
32 static int lv4;
33 extern int Av4a __attribute__((alias ("lv4")));
34 static int *pv4a = &Av4a;
35 
36 typedef void ftype(void);
37 
lf1(void)38 static void lf1(void) {}
39 extern ftype Af1a __attribute__((alias ("lf1")));
40 ftype *pf1a = &Af1a;
41 
lf2(void)42 static void lf2(void) {}
43 extern ftype Af2a __attribute__((alias ("lf2")));
44 ftype *pf2a = &Af2a;
45 
lf3(void)46 static void lf3(void) {}
47 extern ftype Af3a __attribute__((alias ("lf3")));
48 static ftype *pf3a ATTRIBUTE_USED = &Af3a;
49 
lf4(void)50 static void lf4(void) {}
51 extern ftype Af4a __attribute__((alias ("lf4")));
52 static ftype *pf4a = &Af4a;
53 
main()54 main() {
55 #ifdef __mips
56   /* Use real asm for MIPS, to stop the assembler warning about
57      orphaned high-part relocations.  */
58   asm volatile ("lw $2,%0\n\tlw $2,%1" : : "m" (pv4a), "m" (pf4a) : "$2");
59 #else
60   asm volatile ("" : : "m" (pv4a), "m" (pf4a));
61 #endif
62 }
63