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Re: [PATCH]: Make PRE handle globals

From: "Daniel Berlin" <dberlin at dberlin dot org>
To: "Jan Hubicka" <jh at suse dot cz>
Cc: "Jan Hubicka" <hubicka at ucw dot cz>, "GCC Patches" <gcc-patches at gcc dot gnu dot org>
Date: Sun, 8 Jul 2007 16:38:58 -0400
Subject: Re: [PATCH]: Make PRE handle globals
References: <4aca3dc20707061258p44c9bb02v80440cfc0ceb4a34@mail.gmail.com> <20070707231340.GC21547@atrey.karlin.mff.cuni.cz> <4aca3dc20707071625g24754441h2eb94ced1d8fef6@mail.gmail.com> <20070708155959.GB6905@kam.mff.cuni.cz>

On 7/8/07, Jan Hubicka <jh@suse.cz> wrote:

> >Hi,
> >this patch apparently cause 6% memory usage growth combine.c compilation
> >-O3... Those might be just more pseudos to regalloc by more PRE.
> >
>
> It's probably because we had to copy DECL's at every point they have
> different vuses :)

Apparently the memory usage is mostly back (with 1% regressions
elsewhere).  I wonder how copying DECLs increased non-GGC memory usage?

They were pool alloc'd.


Honza
>
> I've reverted the majority (PRE parts) of the patch, let me know if
> the memory use doesn't go back down ;)
>
> Basically what is left will still propagate constants/etc through
> globals, but won't move globals around.

References:
- [PATCH]: Make PRE handle globals
  - From: Daniel Berlin
- Re: [PATCH]: Make PRE handle globals
  - From: Jan Hubicka
- Re: [PATCH]: Make PRE handle globals
  - From: Daniel Berlin
- Re: [PATCH]: Make PRE handle globals
  - From: Jan Hubicka

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