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Date: Tue, 30 Oct 2007 05:05:54 -0700 (PDT)
From: "Dmitry Pronichkin (JIRA)" <jira@apache.org>
To: commits@harmony.apache.org
Subject: [jira] Updated: (HARMONY-3584) [drlvm][jit][opt] arraycopy folding
 implementation in guarded manner
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     [ https://issues.apache.org/jira/browse/HARMONY-3584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dmitry Pronichkin updated HARMONY-3584:
---------------------------------------

    Attachment: HARMONY-3584_arraycopy_up_to_date2.patch

There was a mistake which eliminated fast arraycopy execution. Fix for this and some imrovements in code generation are included in new patch. 
So now everything is checked and works correctly. Ready for commit.

> [drlvm][jit][opt] arraycopy folding implementation in guarded manner
> --------------------------------------------------------------------
>
>                 Key: HARMONY-3584
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3584
>             Project: Harmony
>          Issue Type: Sub-task
>          Components: DRLVM
>            Reporter: George Timoshenko
>            Assignee: Mikhail Fursov
>            Priority: Minor
>         Attachments: arraycopy.patch, arraycopy_pass.patch, HARMONY-3584_arraycopy_up_to_date.patch, HARMONY-3584_arraycopy_up_to_date2.patch, intrinsic_patch.patch
>
>
> the feature (arraycopy call replacement) can be done in the guarded manner. When the classes of the arrays are being checked at runtime. 
> (It is not obvious if it gives a performance effect or not). 
> when this approach (guarded arraycopy call "inlining") is being implemented this optimisation should be moved out from the translator and inserted (before inliner) into the HLO path as a separate optimisation. 

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