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Re: IRA improvements 1/4

From: Vladimir Makarov <vmakarov at redhat dot com>
To: Bernd Schmidt <bernds at codesourcery dot com>
Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>, Jeffrey Law <law at redhat dot com>
Date: Wed, 07 Jul 2010 16:36:54 -0400
Subject: Re: IRA improvements 1/4
References: <4C34819D.2050903@redhat.com> <4C34E2EE.1030506@codesourcery.com>

Bernd Schmidt wrote:

On 07/07/2010 03:31 PM, Vladimir Makarov wrote:
The patch removes -fira-coalesce because it is really hard to implement it with the new dynamically calculated allocno classes. The patch uses also new spilling algorithms because of the same reason. Removing -fira-coalesce is not a big deal because it is not used and its most functionality is implemented by IRA preferencing technique.
coalesce_allocnos is still present.  Is this only used for sharing stack
slots now?

Yes. It is used only for stack slots.

References:
- IRA improvements 1/4
  - From: Vladimir Makarov
- Re: IRA improvements 1/4
  - From: Bernd Schmidt

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