1// { dg-do link } 2// { dg-xfail-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 20static int lv1; 21extern int Av1a __attribute__((alias ("lv1"))); 22int *pv1a = &Av1a; 23 24static int lv2; 25extern int Av2a __attribute__((alias ("lv2"))); 26int *pv2a = &lv2; 27 28static int lv3; 29extern int Av3a __attribute__((alias ("lv3"))); 30static int *pv3a ATTRIBUTE_USED = &Av3a; 31 32static int lv4; 33extern int Av4a __attribute__((alias ("lv4"))); 34static int *pv4a = &Av4a; 35 36typedef void ftype(void); 37 38static void lf1(void) {} 39extern ftype Af1a __attribute__((alias ("lf1"))); 40ftype *pf1a = &Af1a; 41 42static void lf2(void) {} 43extern ftype Af2a __attribute__((alias ("lf2"))); 44ftype *pf2a = &Af2a; 45 46static void lf3(void) {} 47extern ftype Af3a __attribute__((alias ("lf3"))); 48static ftype *pf3a ATTRIBUTE_USED = &Af3a; 49 50static void lf4(void) {} 51extern ftype Af4a __attribute__((alias ("lf4"))); 52static ftype *pf4a = &Af4a; 53 54main() { 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