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Re: REGISTER_CONSTRAINTS
- To: Bernd Schmidt <bernds at cygnus dot co dot uk>
- Subject: Re: REGISTER_CONSTRAINTS
- From: Jeffrey A Law <law at cygnus dot com>
- Date: Wed, 29 Sep 1999 10:58:53 -0600
- cc: gcc at gcc dot gnu dot org
- Reply-To: law at cygnus dot com
In message <Pine.LNX.4.10.9909291736400.19698-100000@biriani.cygnus.co.uk>you
write:
> The documentation states that all ports in existence use register
> constraints. This means that we have some code in the compiler which
> hasn't been compiled and tested in several years. Could we delete all
> the [! REGISTER_CONSTRAINTS] code? How likely is it that a new machine
> description will use no register constraints, and if it is likely, is the
> expected compiler performance penalty bad enough to leave the code in
> there?
I've believed for a while that we should kill the !REGISTER_CONSTRAINTS code.
I don't forsee any port using it, ever.
I vote we kill it.
jeff