gcc/testsuite/gcc.target/i386/20011107-1.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target ia32 } */
   3 /* { dg-options "-O2 -mtune=k6" } */
   4
   5 void
   6 foo (unsigned char *x, const unsigned char *y)
   7 {
   8   int a = 6;
   9   unsigned char *b;
  10   for (;;)
  11     {
  12       unsigned char *c = x;
  13
  14       while (1)
  15         {
  16           if (c + 2 < y)
  17             c += 3;
  18           else
  19             break;
  20         }
  21       b = x + a;
  22       if (*c == 4 || *c == 5)
  23         {
  24           unsigned char d = c[2];
  25
  26           if (b[3] == 7 || b[3] == 8)
  27             {
  28               int e = b[3] == 8;
  29               if (d < b[4] * 8 && b[5 + d / 8] & (1 << (d % 8)))
  30                 e = !e;
  31               if (!e)
  32                 x[-3] = 26;
  33             }
  34         }
  35       else if (*c == 7 && b[3] == 8)
  36         {
  37           int f;
  38           for (f = 0; f < (int) c[1]; f++)
  39             if (!(c[2 + f] == 0))
  40               break;
  41           if (f == c[1])
  42             x[-3] = 26;
  43         }
  44       x -= 2;
  45     }
  46 }