removing unused NOTE_INSN notes?

[Jan Hubicka]

Hi,
I am looking about what NOTE_INSN notes are still in use.  There appears
to be some of these unused.  Are there any plans to use them, or
should we just remove them?

After my quick survey following ones are at my list:
 /* Start/end of a live range region, where pseudos allocated on the stack
     can be allocated to temporary registers.  Uses NOTE_RANGE_INFO.  */
  NOTE_INSN_RANGE_BEG,
  NOTE_INSN_RANGE_END,

  /* Record which registers are currently live.  Uses NOTE_LIVE_INFO.  */
  NOTE_INSN_LIVE,


Honza