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Re: compiling very large functions.
- From: Eric Botcazou <ebotcazou at adacore dot com>
- To: "Daniel Berlin" <dberlin at dberlin dot org>
- Cc: gcc at gcc dot gnu dot org, "Steven Bosscher" <stevenb dot gcc at gmail dot com>, "Richard Guenther" <richard dot guenther at gmail dot com>, "Kenneth Zadeck" <zadeck at naturalbridge dot com>, "Paolo Bonzini" <paolo dot bonzini at lu dot unisi dot ch>, "Hubicha, Jan" <jh at suse dot cz>, "Ian Lance Taylor" <ian at airs dot com>, "Novillo, Diego" <dnovillo at redhat dot com>
- Date: Sun, 5 Nov 2006 21:03:36 +0100
- Subject: Re: compiling very large functions.
- References: <454CF559.3090701@naturalbridge.com> <200611051804.20657.ebotcazou@adacore.com> <4aca3dc20611051104s6b81e8e5y28d4f44e8d1fafe2@mail.gmail.com>
> > Tree alias analysis can partially disable itself though:
>
> No, it can't. Tree alias representation can :)
I presume you're thinking of the pass that performs the analysis, while I was
more thinking of the global machinery; my understanding is that the machinery
will not be able to disambiguate memory accesses it would have been able to,
if the limit were not reached.
> it is also not really partially disabling. It's really fully disabling
> in 99% of
Partially because it only affects call-clobbered variables IIUC.
--
Eric Botcazou