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  
      38  static void lf1(void) {}
      39  extern ftype Af1a __attribute__((alias ("lf1")));
      40  ftype *pf1a = &Af1a;
      41  
      42  static void lf2(void) {}
      43  extern ftype Af2a __attribute__((alias ("lf2")));
      44  ftype *pf2a = &Af2a;
      45  
      46  static void lf3(void) {}
      47  extern ftype Af3a __attribute__((alias ("lf3")));
      48  static ftype *pf3a ATTRIBUTE_USED = &Af3a;
      49  
      50  static void lf4(void) {}
      51  extern ftype Af4a __attribute__((alias ("lf4")));
      52  static ftype *pf4a = &Af4a;
      53  
      54  int
      55  main() {
      56  #ifdef __mips
      57    /* Use real asm for MIPS, to stop the assembler warning about
      58       orphaned high-part relocations.  */
      59    asm volatile ("lw $2,%0\n\tlw $2,%1" : : "m" (pv4a), "m" (pf4a) : "$2");
      60  #else
      61    asm volatile ("" : : "m" (pv4a), "m" (pf4a));
      62  #endif
      63  }