gcc/testsuite/gcc.dg/20011107-1.c

   1 /* { dg-do compile { target i?86-*-* } } */
   2 /* { dg-options "-O2 -mtune=k6" } */
   3
   4 void
   5 foo (unsigned char *x, const unsigned char *y)
   6 {
   7   int a = 6;
   8   unsigned char *b;
   9   for (;;)
  10     {
  11       unsigned char *c = x;
  12
  13       while (1)
  14         {
  15           if (c + 2 < y)
  16             c += 3;
  17           else
  18             break;
  19         }
  20       b = x + a;
  21       if (*c == 4 || *c == 5)
  22         {
  23           unsigned char d = c[2];
  24
  25           if (b[3] == 7 || b[3] == 8)
  26             {
  27               int e = b[3] == 8;
  28               if (d < b[4] * 8 && b[5 + d / 8] & (1 << (d % 8)))
  29                 e = !e;
  30               if (!e)
  31                 x[-3] = 26;
  32             }
  33         }
  34       else if (*c == 7 && b[3] == 8)
  35         {
  36           int f;
  37           for (f = 0; f < (int) c[1]; f++)
  38             if (!(c[2 + f] == 0))
  39               break;
  40           if (f == c[1])
  41             x[-3] = 26;
  42         }
  43       x -= 2;
  44     }
  45 }