Question about rtx format for insn, call_insn and junp_insn

[kito]

Hello every body
I have read the rtl.h & rtl.c,
but I don't realize the format for  insn, call_insn and junp_insn

it's define in rtl.def

DEF_RTL_EXPR(JUMP_INSN, "jump_insn", "iuuBieie0", RTX_INSN)

and it's dump by some real program

(jump_insn 14  /*  i */
           13         /*  u */
           15         /* u  */
           1           /* B */
           (set (pc)
                (if_then_else (le (reg:CCGC 17 flags)
                                  (const_int 0 [0x0]))
                              (label_ref 24)
                              (pc)))                        /*   e?? */
          -1     /* i? */
          (nil)  /* e?  */
          (nil)  /* 0? */ )

so my question is where is the i after B ??

gcc version 4.4.1