gnu/dist/gcc4/gcc/testsuite/gcc.c-torture/execute/20020402-3.c

   1 /* extracted from gdb sources */
   2
   3 typedef unsigned long long CORE_ADDR;
   4
   5 struct blockvector;
   6
   7 struct symtab {
   8   struct blockvector *blockvector;
   9 };
  10
  11 struct sec {
  12   void *unused;
  13 };
  14
  15 struct symbol {
  16   int len;
  17   char *name;
  18 };
  19
  20 struct block {
  21         CORE_ADDR startaddr, endaddr;
  22         struct symbol *function;
  23         struct block *superblock;
  24         unsigned char gcc_compile_flag;
  25         int nsyms;
  26         struct symbol syms[1];
  27 };
  28
  29 struct blockvector {
  30         int nblocks;
  31         struct block *block[2];
  32 };
  33
  34 struct blockvector *blockvector_for_pc_sect(register CORE_ADDR pc,
  35                                             struct symtab *symtab)
  36 {
  37   register struct block *b;
  38   register int bot, top, half;
  39   struct blockvector *bl;
  40
  41   bl = symtab->blockvector;
  42   b = bl->block[0];
  43
  44   bot = 0;
  45   top = bl->nblocks;
  46
  47   while (top - bot > 1)
  48     {
  49       half = (top - bot + 1) >> 1;
  50       b = bl->block[bot + half];
  51       if (b->startaddr <= pc)
  52         bot += half;
  53       else
  54         top = bot + half;
  55     }
  56
  57   while (bot >= 0)
  58     {
  59       b = bl->block[bot];
  60       if (b->endaddr > pc)
  61         {
  62           return bl;
  63         }
  64       bot--;
  65     }
  66   return 0;
  67 }
  68
  69 int main(void)
  70 {
  71   struct block a = { 0, 0x10000, 0, 0, 1, 20 };
  72   struct block b = { 0x10000, 0x20000, 0, 0, 1, 20 };
  73   struct blockvector bv = { 2, { &a, &b } };
  74   struct symtab s = { &bv };
  75
  76   struct blockvector *ret;
  77
  78   ret = blockvector_for_pc_sect(0x500, &s);
  79
  80   return 0;
  81 }