Re: Superblock optimizations

IndianTechie <kamalpr@gmail.com>
Mon, 14 Apr 2008 22:20:49 -0700 (PDT)

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Related articles
Superblock optimizations plfriko@yahoo.de (Tim Frink) (2008-04-06)
Re: Superblock optimizations andreybokhanko@gmail.com (2008-04-13)
Re: Superblock optimizations kamalpr@gmail.com (IndianTechie) (2008-04-14)
Re: Superblock optimizations plfriko@yahoo.de (Tim Frink) (2008-04-19)
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From: IndianTechie <kamalpr@gmail.com>
Newsgroups: comp.compilers
Date: Mon, 14 Apr 2008 22:20:49 -0700 (PDT)
Organization: Compilers Central
References: 08-04-023 08-04-051
Keywords: optimize
Posted-Date: 15 Apr 2008 13:54:44 EDT

On Apr 13, 10:58 pm, andreybokha...@gmail.com wrote:
> I believe the primary reason why superblocks exist on machine-specific
> IRs is because they used by machine-specific optimizations (primarly
> by scheduling).
>
> Profiling, however, can be (and actually does) used by machine-
> independent (well... actually, less clearly machine-dependent)
> optimizations, working on machine-independent IRs. Examples are loop
> optimizations (unrolling, prefetch, etc) and PRE.


also, look at HP's profile based optimizations. You can get that by
using +O4 on HP's compilers.


regards
-kamal


> Andrey


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