on nios2 difine_insn indirect_call

on nios2 difine_insn indirect_call

[Liu Haibin]

Hi, 

The nios2.md has a define_insn "indirect_call"

(define_insn "indirect_call"
  [(call (mem:QI (match_operand:SI 0 "register_operand" "r"))
         (match_operand 1 "" ""))
   (clobber (reg:SI RA_REGNO))]
  ""
  "callr\\t%0"
  [(set_attr "type" "control")])

But I find that in test.c.26.flow2, there is such a code.

(call_insn 41 37 42 1 0x101e17b0 (parallel [
            (call (mem:QI (reg/f:SI 3 r3 [58]) [0 S1 A8])
                (const_int 0 [0x0]))
            (clobber (reg:SI 31 ra))
        ]) 41 {indirect_call} (insn_list 40 (insn_list 39 (nil)))
    (expr_list:REG_DEAD (reg:SI 4 r4)
        (expr_list:REG_DEAD (reg/f:SI 3 r3 [58])
            (expr_list:REG_UNUSED (reg:SI 31 ra)
                (nil))))
    (expr_list (use (reg:SI 4 r4))
        (nil)))

Why is there a "parallel" for indirect_call in .26.flow2 but no
"parallel" in define_insn indirect_call? Does it mean that the
"define_insn indirect_call" in md file impilcitly has "parallel"
surrounding it?


Regards,
Timothy

RE: on nios2 difine_insn indirect_call

[Jonah Graham]

Hi Timothy, 

Unfortunately the Nios II port of GCC is not (yet) in the gcc tree so
most people don't have access to it.

The reason it is parallel is that if define_insn contains more than one
element, that defines a parallel. Have a look at:
http://gcc.gnu.org/onlinedocs/gccint/Patterns.html

Jonah

=================================
jgraham@altera.com
Altera European Technology Centre
www.altera.com/nios2 

	


	-------- Original Message -------- 
	Subject: 	on nios2 difine_insn indirect_call	
	Date: 	Mon, 18 Jul 2005 14:47:59 +0800	
	From: 	Liu Haibin <liu.haibin@gmail.com>
<mailto:liu.haibin@gmail.com> 	
	Reply-To: 	Liu Haibin <liu.haibin@gmail.com>
<mailto:liu.haibin@gmail.com> 	
	To: 	gcc@gcc.gnu.org	


	Hi, 
	
	The nios2.md has a define_insn "indirect_call"
	
	(define_insn "indirect_call"
	  [(call (mem:QI (match_operand:SI 0 "register_operand" "r"))
	         (match_operand 1 "" ""))
	   (clobber (reg:SI RA_REGNO))]
	  ""
	  "callr\\t%0"
	  [(set_attr "type" "control")])
	
	But I find that in test.c.26.flow2, there is such a code.
	
	(call_insn 41 37 42 1 0x101e17b0 (parallel [
	            (call (mem:QI (reg/f:SI 3 r3 [58]) [0 S1 A8])
	                (const_int 0 [0x0]))
	            (clobber (reg:SI 31 ra))
	        ]) 41 {indirect_call} (insn_list 40 (insn_list 39
(nil)))
	    (expr_list:REG_DEAD (reg:SI 4 r4)
	        (expr_list:REG_DEAD (reg/f:SI 3 r3 [58])
	            (expr_list:REG_UNUSED (reg:SI 31 ra)
	                (nil))))
	    (expr_list (use (reg:SI 4 r4))
	        (nil)))
	
	Why is there a "parallel" for indirect_call in .26.flow2 but no
	"parallel" in define_insn indirect_call? Does it mean that the
	"define_insn indirect_call" in md file impilcitly has "parallel"
	surrounding it?
	
	
	Regards,
	Timothy