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From "Egor Pasko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-5486) [drlvm][jit][opt] On-stack allocation feature
Date Tue, 12 Feb 2008 08:55:18 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-5486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12568007#action_12568007
] 

Egor Pasko commented on HARMONY-5486:
-------------------------------------

Hm, I dunno, did not think about it actually. I guess this is a tradeoff: from one hand instruction
seems like easier to deal with than any operand (I do not know where we should deal with it
actually), but on the other hand supporting new instructions in all optimizations is rather
not beautiful, one needs to update all switch(Opcode).

Do you have a small sketch of the what's going to be done with this instruction? What optpasses
are likely to be involved? I would be very happy to read that and add some tricky details
to my poor knowledge of the subject.

> [drlvm][jit][opt] On-stack allocation feature 
> ----------------------------------------------
>
>                 Key: HARMONY-5486
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5486
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>         Environment: All
>            Reporter: Evgueni Brevnov
>         Attachments: alloca.patch
>
>
> Here is a new feature which allows to allocate space on the stack. It can be used to
implement new optimization. Non-escaped objects can be allocated on the stack but managed
heap.
> Thanks
> Evgueni

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