1  /* Asm operands that are given as hard registers must keep the same
       2     hard register all the way through compilation.  Example derived
       3     from glibc source.  */
       4  /* { dg-do compile } */
       5  /* { dg-options "-O2 -frename-registers -fcprop-registers" } */
       6  /* { dg-final { scan-assembler "callsys1 .0 .19 .0 .16 .17" } } */
       7  /* { dg-final { scan-assembler "callsys2 .0 .19 .0 .16 .17" } } */
       8  
       9  struct stat {
      10    int dummy;
      11  };
      12  
      13  struct kernel_stat {
      14    int dummy;
      15  };
      16  
      17  extern int xstat_conv (int vers, struct kernel_stat *kbuf, void *ubuf);
      18  extern int *__errno_location (void) __attribute__ ((__const__));
      19  
      20  int
      21  __fxstat (int vers, int fd, struct stat *buf)
      22  {
      23    struct kernel_stat kbuf;
      24    int result;
      25  
      26    if (vers == 0)
      27      return
      28        ({
      29  	long _sc_ret, _sc_err;
      30  	{
      31  	  register long _sc_0 __asm__("$0");
      32  	  register long _sc_16 __asm__("$16");
      33  	  register long _sc_17 __asm__("$17");
      34  	  register long _sc_19 __asm__("$19");
      35  	  _sc_0 = 91;
      36  	  _sc_16 = (long) (fd);
      37  	  _sc_17 = (long) (((struct kernel_stat *) buf));
      38  	  __asm__("callsys1 %0 %1 %2 %3 %4"
      39  		  : "=r"(_sc_0), "=r"(_sc_19)
      40  		  : "0"(_sc_0), "r"(_sc_16), "r"(_sc_17)
      41  		  : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",
      42  		    "$22", "$23", "$24", "$25", "$27", "$28", "memory");
      43  	  _sc_ret = _sc_0, _sc_err = _sc_19;
      44  	}
      45  	if (_sc_err)
      46  	  {
      47  	    (*__errno_location ()) = (_sc_ret);
      48  	    _sc_ret = -1L;
      49  	  }
      50  	_sc_ret;
      51        });
      52  
      53    result =
      54        ({
      55  	long _sc_ret, _sc_err;
      56  	{
      57  	  register long _sc_0 __asm__("$0");
      58  	  register long _sc_16 __asm__("$16");
      59  	  register long _sc_17 __asm__("$17");
      60  	  register long _sc_19 __asm__("$19");
      61  	  _sc_0 = 91;
      62  	  _sc_16 = (long) (fd);
      63  	  _sc_17 = (long) ((&kbuf));
      64  	  __asm__("callsys2 %0 %1 %2 %3 %4"
      65  		  : "=r"(_sc_0), "=r"(_sc_19)
      66  		  : "0"(_sc_0), "r"(_sc_16), "r"(_sc_17)
      67  		  : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",
      68  		    "$22", "$23", "$24", "$25", "$27", "$28", "memory");
      69  	  _sc_ret = _sc_0, _sc_err = _sc_19;
      70  	}
      71  	if (_sc_err)
      72  	  {
      73  	    (*__errno_location ()) = (_sc_ret);
      74  	    _sc_ret = -1L;
      75  	  }
      76  	_sc_ret;
      77        });
      78    if (result == 0)
      79      result = xstat_conv (vers, &kbuf, buf);
      80  
      81    return result;
      82  }