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Re: rtx_equal_function_value_matters



  In message <199811250721.XAA31712@dm.cobaltmicro.com>you write:
  >    Date: Tue, 24 Nov 1998 11:37:45 -0700
  >    From: Jeffrey A Law <law@hurl.cygnus.com>
  > 
  >    I suspect creating new pseudos after cse_not_expected doesn't win anythi
  > ng
  >    at all except for the cases where we create them during regclass.
  > 
  > See my other mail, consider instruction scheduling.
That is precisely the case I was considering -- I was assuming the pseudos
created via the gen_move_insn calls in regclass were going to be useful in
some manner that helped scheduling.

I can't think of any other cases where creating a pseudo after cse_not_expected
is true could be a win.  Or more correctly there aren't cases I'm aware of
between the time we set cse_not_expected and the start of the first life pass
where we create new pseudos, except for the regclass stuff.

What cases are you thinking of?


jeff


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