Re: [rvm-research] Help in understanding jikes RVM

[abhishek g. <abh...@gm...>]

Hello ,


Thanks Eric and Mike for your response.

I have basic idea about the optimization. I wanted to implement the PRE
using the SSA and show the use the adaptive optimization for my course
project.

That's why a want to look the algorithms used for the SSA form conversion,
global value numbers and Global CSE.

I came to know PRE has been disabled in the jikesrvm. If any one can tell
me what was previous implementation method (Algorithm) and the problem
because of which it was disabled, It will help me a lot to understands the
things which can go wrong while the implementaion.

If you have any idea for implementing PRE using SSA ( like some good
algorithm , reference paper ) please tell me that.

Please correct me if I am going in wrong direction.


Thanks

Abhishek




On Tue, Sep 18, 2012 at 1:52 AM, Michael Bond
<mik...@cs...>wrote:

>  Hi Abhishek,
>
> I agree with Erik that it would help if you provided more information
> about what you're hoping to learn or do.
>
> Here are some starting points for the optimizing compiler:
>
> - The Jikes RVM User Guide has a lot of introductory, high-level
> information to help you get started using Jikes:
> http://jikesrvm.org/User+Guide.  It includes some pages devoted to the
> opt compiler.
>
> - OptimizationPlanner.java shows all compiler optimizations and the order
> in which they're invoked.
>
> - There are presentations about the opt compiler:
> http://jikesrvm.org/Presentations.  They're old, but I believe the design
> hasn't changed much since then (unlike many other parts of Jikes).
>
> Other than that, reading the source code and its comments is probably the
> best way to understand the opt compiler (and Jikes in general).
>
> Cheers,
> Mike
>
>
> On 09/17/2012 12:37 PM, abhishek gupta wrote:
>
> Hi
>
>  I am a student. I want to use jikes RVM for my education work.
>
>  I am looking in optimizing compilers area.  I want to understand the
> optimization techniques used in jikes RVM.
>
>  Please any one tell me from where should I begin.
>
>  I have already gone through some research papers. But I am able to find
> out the details about each optimization like global common sub-expression
> elimination etc .
>
>  Thanks
>
>  With Regards
> Abhishek Gupta
>
>
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