(arg_home): Add CLOBBER of MEM and USE of arg regs.

From-SVN: r13535

gcc/config/alpha/alpha.md

@@ -4394,6 +4394,19 @@
   [(unspec [(const_int 0)] 0)
    (use (reg:DI 1))
    (use (reg:DI 25))
+   (use (reg:DI 16))
+   (use (reg:DI 17))
+   (use (reg:DI 18))
+   (use (reg:DI 19))
+   (use (reg:DI 20))
+   (use (reg:DI 21))
+   (use (reg:DI 48))
+   (use (reg:DI 49))
+   (use (reg:DI 50))
+   (use (reg:DI 51))
+   (use (reg:DI 52))
+   (use (reg:DI 53))
+   (clobber (mem:BLK (const_int 0)))
    (clobber (reg:DI 24))
    (clobber (reg:DI 25))
    (clobber (reg:DI 0))]