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Re: Reduce startup cost of compiler (patch 2)
On Tue, Jul 31, 2007 at 05:52:16AM +0200, Jan Hubicka wrote:
>
> Hi,
> the limitation was alwas there
COSTS_N_INSNS (60000) = 240000 used to work fine. :-)
> - regclass used value of 65535 as an
> infinity for impossible combinations. This also means that you should
> not need to discougrate ALL_REGS and similar classes since regstack is
> supposed to work this out.
It's a good thing you say "supposed to". Regclass tends to prefer
ALL_REGS over MEM and ALL_REGS tends to include such things as virtual
hard regs. Returning a high REGISTER_MOVE_COST for ALL_REGS keeps regclass
clear of ALL_REGS.
> if the @samp{mov@var{m}} pattern's constraints do not allow such copying.
> + The maximal allowed value is 65535.
> @end defmac
Well, it's 65534, isn't it?
--
Rask Ingemann Lambertsen