Re: Superblock optimizations

IndianTechie <>
Mon, 14 Apr 2008 22:20:49 -0700 (PDT)

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From: IndianTechie <>
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, 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.


> Andrey

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