Re: Superblock optimizations

andreybokhanko@gmail.com
Sun, 13 Apr 2008 10:58:48 -0700 (PDT)

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From: andreybokhanko@gmail.com
Newsgroups: comp.compilers
Date: Sun, 13 Apr 2008 10:58:48 -0700 (PDT)
Organization: Compilers Central
References: 08-04-023
Keywords: optimize
Posted-Date: 13 Apr 2008 22:25:43 EDT

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.

Andrey

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