question on function change_loop in IRA

[Amker.Cheng]

Hi:
  At last of function change_loop, gcc try to change ALLOCNO_REG of
local allocno.
In the loop, ALLOCNO_SOMEWHERE_RENAMED_P (allocno) is set if allocno is not
caps.
Don't understand why the flag is set here. Doesn't all local allocnos'
flag are set in this
loop? seems conflicting with function set_allocno_somewhere_renamed_p
and comments
about that flag in ira-int.h

Any tips? Thanks in advance.

-- 
Best Regards.