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From "George Timoshenko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-3584) [drlvm][jit][opt] arraycopy folding implementation in guarded manner
Date Fri, 18 Jan 2008 10:49:35 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-3584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12560336#action_12560336
] 

George Timoshenko commented on HARMONY-3584:
--------------------------------------------

As the patch is still not committed

it should be updated to take https://issues.apache.org/jira/browse/HARMONY-5399 changes into
account.

> [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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