gcc/testsuite/gcc.dg/alias-11.c

   1 /* { dg-do run } */
   2 /* { dg-require-alias "" } */
   3 /* { dg-options "-O2" } */
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8
   9 typedef struct dw_cfi_struct
  10 {
  11   struct dw_cfi_struct *dw_cfi_next;
  12   const char *dw_cfi_addr;
  13 }
  14 dw_cfi_node;
  15
  16 typedef struct dw_fde_struct
  17 {
  18   const char *dw_fde_current_label;
  19   dw_cfi_node *dw_fde_cfi;
  20 }
  21 dw_fde_node;
  22
  23 dw_cfi_node *cie_cfi_head;
  24 unsigned fde_table_in_use;
  25 dw_fde_node *fde_table;
  26
  27 static __inline__ void
  28 add_cfi (dw_cfi_node **list_head, dw_cfi_node *cfi)
  29 {
  30   dw_cfi_node **p;
  31
  32   for (p = list_head; (*p) != ((void *)0); p = &(*p)->dw_cfi_next)
  33     ;
  34
  35   *p = cfi;
  36 }
  37
  38 static __inline__ struct dw_cfi_struct *
  39 new_cfi (void)
  40 {
  41   dw_cfi_node *cfi = (dw_cfi_node *) malloc (sizeof (dw_cfi_node));
  42
  43   memset (cfi, 0, sizeof (dw_cfi_node));
  44   return cfi;
  45 }
  46
  47 char *
  48 dwarf2out_cfi_label (void)
  49 {
  50   static char label[20];
  51   static unsigned long label_num = 0;
  52
  53   sprintf (label, "*.%s%u", "LCFI", (unsigned) (label_num++));
  54   return label;
  55 }
  56
  57 void
  58 add_fde_cfi (const char *label, dw_cfi_node *cfi)
  59 {
  60   if (label)
  61     {
  62       dw_fde_node *fde = fde_table + fde_table_in_use - 1;
  63
  64       if (*label == 0)
  65         label = dwarf2out_cfi_label ();
  66
  67       if (fde->dw_fde_current_label == ((void *)0)
  68           || strcmp (label, fde->dw_fde_current_label))
  69         {
  70           dw_cfi_node *xcfi;
  71
  72           fde->dw_fde_current_label = label = strdup (label);
  73
  74           xcfi = new_cfi ();
  75           xcfi->dw_cfi_addr = label;
  76           add_cfi (&fde->dw_fde_cfi, xcfi);
  77         }
  78
  79       add_cfi (&fde->dw_fde_cfi, cfi);
  80     }
  81   else
  82     add_cfi (&cie_cfi_head, cfi);
  83 }
  84
  85 int
  86 main ()
  87 {
  88   dw_cfi_node *cfi;
  89   dw_fde_node *fde;
  90
  91   fde_table_in_use = 1;
  92   fde_table = (dw_fde_node *) realloc (fde_table,
  93                                        sizeof (dw_fde_node));
  94   memset (fde_table, 0, sizeof (dw_fde_node));
  95   cfi = new_cfi ();
  96   add_fde_cfi ("", cfi);
  97
  98   fde = &fde_table[0];
  99   cfi = fde->dw_fde_cfi;
 100
 101   if (cfi == NULL)
 102     abort ();
 103
 104   if (cfi->dw_cfi_addr == NULL)
 105     abort ();
 106
 107   if (strcmp ("*.LCFI0", cfi->dw_cfi_addr))
 108     abort ();
 109
 110   return 0;
 111 }