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From "Alexey Varlamov (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HARMONY-5014) [drlvm][jit][opt] "instanceof" breaks scalar replacement in the new HashMap implementation
Date Wed, 28 Nov 2007 06:18:43 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5014?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Alexey Varlamov reassigned HARMONY-5014:

    Assignee: Alexey Varlamov

> [drlvm][jit][opt] "instanceof" breaks scalar replacement in the new HashMap implementation
> ------------------------------------------------------------------------------------------
>                 Key: HARMONY-5014
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5014
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>            Reporter: Dmitry Pronichkin
>            Assignee: Alexey Varlamov
>         Attachments: H5014.patch
> The new HashMap implementation made by Tim Ellison came into collision with the following
problem: scalar replacement for HashMap.get(Integer.valueOf(..)) is not working. The reason
is that the Integer object is not scalarized because of "instanceof" instruction. But escape
analysis knows the real type of the key and it can evaluate "instanceof" making possible for
the key to be scalarized.

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