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From Egor Pasko <egor.pa...@gmail.com>
Subject Re: [drlvm][jit][opt] (HARMONY-3584) arraycopy folding implementation in guarded manner
Date Wed, 15 Aug 2007 14:37:21 GMT
On the 0x332 day of Apache Harmony Pronichkin Dmitry wrote:
> Hello,
> 
> I want to make an optimization in arraycopy function as described in
> [HARMONY-3584]. At present, the arraycopy call transforms into intrinsic
> call. But in JIT there are also JITHelper calls which are almost the same as
> intrinsic. The only difference is two "Tau" parameters. So, I would like to
> know what is "Tau" and why is it needed.

in 7 words: Tau is to convert control-dependencies to data-dependencies.

BTW, where are you from? :) If you are in Novosibirsk, you can ask
Mikhail (Fursov) to explain it face2face.

-- 
Egor Pasko


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