;; The dummy instruction has been supported to ensure that no empty
;; arrays are generated in source files of the generated compiler in the
;; initial levels..

(define_insn "dummy_pattern"
        [(reg:SI 0)]
        "1"
        "This stmnt should not be emitted!"
)

;; Functions in genemit.c read .md file for desired target and generates
;; gen_<insn-name> function  for each standard named  pattern defined in
;; .md file.  The function gen_<insn-name>  is in turn used  to generate
;; RTLs at the  time of transforming input program into  RTL. The source
;; files  cfgrtl.c,  cse.c,expmed.c which  contribute  in  cc1, use  the
;; function gen_jump to generate insn corresponding to jump instruction.
;; If this pattern is not  defined in machine description, the compiler,
;; fails in the linking phase because gen_jump is not defined.


;; For compiling _any_ program, jumps are a must.

(define_insn "jump"
        [(set (pc) (label_ref (match_operand 0 "" "")))]
        ""
	{
                return "j \\t%l0";
        }
)

(define_insn "indirect_jump"
	[(set (pc) (match_operand:SI 0 "register_operand" ""))]
	""
	"jr \\t%0"
)

(define_expand "epilogue"
        [(clobber (const_int 0))]
        ""
        {
                spim_epilogue();
                DONE;
        }
)

(define_insn "IITB_return"
	[(return)]
	""
	"jr \\t\\$ra"
)