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Help with following RTL
- From: "kernel coder" <lhrkernelcoder at gmail dot com>
- To: gcc at gcc dot gnu dot org
- Date: Fri, 9 Jun 2006 11:18:53 +0500
- Subject: Help with following RTL
hi,
Following is a c code .
int a;
main()
{
a=a+1;
}
This RTL generated for this programe for mips processor is
/*******************************************************/
; Function main
(note 2 0 3 NOTE_INSN_DELETED)
(note 3 2 4 NOTE_INSN_FUNCTION_BEG)
(note 4 3 5 NOTE_INSN_DELETED)
(note 5 4 6 NOTE_INSN_DELETED)
(note 6 5 8 NOTE_INSN_DELETED)
(insn 8 6 9 (nil) (set (reg:SI 182)
(mem/f:SI (symbol_ref:SI ("a")) [0 a+0 S4 A32])) -1 (nil)
(nil))
(insn 9 8 10 (nil) (set (reg:SI 183)
(plus:SI (reg:SI 182)
(const_int 1 [0x1]))) -1 (nil)
(nil))
(insn 10 9 11 (nil) (set (mem/f:SI (symbol_ref:SI ("a")) [0 a+0 S4 A32])
(reg:SI 183)) -1 (nil)
(nil))
(note 11 10 15 NOTE_INSN_FUNCTION_END)
(insn 15 11 16 (nil) (clobber (reg/i:SI 2 v0)) -1 (nil)
(nil))
(insn 16 15 13 (nil) (clobber (reg:SI 181)) -1 (nil)
(nil))
(code_label 13 16 14 1 "" [0 uses])
(insn 14 13 17 (nil) (set (reg/i:SI 2 v0)
(reg:SI 181)) -1 (nil)
(nil))
(insn 17 14 0 (nil) (use (reg/i:SI 2 v0)) -1 (nil)
(nil))
/*****************************************************/
I'm a newbie in RTL,so please explain what is happening in lines after
(note 11 10 15 NOTE_INSN_FUNCTION_END)
/******************************************************/
(insn 15 11 16 (nil) (clobber (reg/i:SI 2 v0)) -1 (nil)
(nil))
(insn 16 15 13 (nil) (clobber (reg:SI 181)) -1 (nil)
(nil))
(code_label 13 16 14 1 "" [0 uses])
(insn 14 13 17 (nil) (set (reg/i:SI 2 v0)
(reg:SI 181)) -1 (nil)
(nil))
(insn 17 14 0 (nil) (use (reg/i:SI 2 v0)) -1 (nil)
(nil))
/***********************************/
thanks,
shahzad