gcc/testsuite/gcc.c-torture/execute/20080122-1.c

   1 /* PR rtl-optimization/34628 */
   2 /* Origin: Martin Michlmayr <tbm@cyrius.com> */
   3
   4 typedef unsigned short u16;
   5 typedef unsigned char u8;
   6
   7 static void
   8 do_segfault(u8 in_buf[], const u8 out_buf[], const int len)
   9 {
  10   int i;
  11
  12   for (i = 0; i < len; i++) {
  13     asm("");
  14
  15     in_buf[2*i] = (   out_buf[2*i] | out_buf[(2*i)+1]<<8  ) & 0xFF;
  16
  17     asm("");
  18
  19     in_buf[(2*i)+1] =  ( out_buf[2*i] | out_buf[(2*i)+1]<<8 ) >> 8;
  20
  21     asm("");
  22   }
  23 }
  24
  25 int main(int argc, char *argv[])
  26 {
  27   u8 outbuf[32] = "buffer     ";
  28   u8 inbuf[32] = "\f";
  29
  30   asm("");
  31   do_segfault(inbuf, outbuf, 12);
  32   asm("");
  33
  34   return 0;
  35 }