about REG_DEP_OUTPUT dependence

[Liu Haibin]

Hi,

Can someone help me explain that why there's an REG_DEP_OUTPUT (write
after write dependence) between jump_insn 547 and insn 82?

(insn 82 543 478 3 (set (mem/s:SI (reg/f:SI 6 r6 [224]) [4 W S4 A32])
        (reg:SI 2 r2 [95])) 8 {movsi_internal} (insn_list 81 (nil))
    (expr_list:REG_DEAD (reg:SI 2 r2 [95])
        (nil)))
(insn 478 82 547 3 (set (reg/f:SI 6 r6 [224])
        (plus:SI (reg/f:SI 6 r6 [224])
            (const_int 4 [0x4]))) 20 {addsi3} (insn_list:REG_DEP_ANTI
65 (insn_list:REG_DEP_ANTI 66 (insn_list:REG_DEP_ANTI 73
(insn_list:REG_DEP_ANTI 80 (insn_list:REG_DEP_ANTI 82 (nil))))))
    (nil))
(jump_insn 547 478 93 3 (set (pc)
        (if_then_else (ne:SI (reg/v:SI 7 r7 [orig:270 i ] [270])
                (const_int 0 [0x0]))
            (label_ref 88)
            (pc))) 61 {*cbranch} (insn_list 543
(insn_list:REG_DEP_OUTPUT 82 (nil)))
    (expr_list:REG_BR_PROB (const_int 9844 [0x2674])
        (nil)))


Regards,
Haibin