gcc/testsuite/gcc.c-torture/compile/980329-1.c

   1 typedef __SIZE_TYPE__ size_t;
   2 struct re_pattern_buffer
   3   {
   4     unsigned char *buffer;
   5     unsigned long int used;
   6   };
   7 struct re_registers
   8   {
   9     int *start;
  10   };
  11
  12 static const char **regstart, **regend;
  13 static const char **old_regend;
  14
  15 static int
  16 re_match_2_internal (struct re_pattern_buffer *bufp,
  17                      struct re_registers *regs)
  18 {
  19   unsigned char *p = bufp->buffer;
  20   unsigned char *pend = p + bufp->used;
  21
  22   for (;;)
  23     {
  24       int highest_active_reg = 1;
  25       if (bufp)
  26         {
  27           int i;
  28           for (i = 1;; i++)
  29             regs->start[i] = 0;
  30         }
  31
  32       switch ((unsigned int) *p++)
  33         {
  34         case 1:
  35           {
  36             unsigned char r = *p;
  37             if (r)
  38               highest_active_reg = r;
  39           }
  40           if (p + 2 == pend)
  41             {
  42               char is_a_jump_n = 0;
  43               int mcnt = 0;
  44               unsigned char *p1;
  45
  46               p1 = p + 2;
  47               switch (*p1++)
  48                 {
  49                 case 2:
  50                   is_a_jump_n = 1;
  51                 case 1:
  52                   do { do { mcnt = *p1; } while (0); p1 += 2; } while (0);
  53                   if (is_a_jump_n)
  54                     p1 = 0;
  55                 }
  56
  57               if (mcnt && *p1 == 0)
  58                 {
  59                   unsigned r;
  60                   for (r = 0; r < (unsigned) *p + (unsigned) *(p + 1); r++)
  61                     {
  62                       if (regend[0] >= regstart[r])
  63                         regend[r] = old_regend[r];
  64                     }
  65                   do { while (0 < highest_active_reg + 1) { } } while (0);
  66                 }
  67             }
  68         }
  69     }
  70
  71   return -1;
  72 }