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From "Xiaoming Gu (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-5826) [drlvm][jit][opt][performance] Magic for java.math.Multiplication.unsignedMultAdd2
Date Thu, 22 Jan 2009 11:49:59 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5826?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xiaoming Gu updated HARMONY-5826:
---------------------------------

    Attachment: H5826-V7.zip

This message is for V7. 

In this version, the main change is that global_prop works with early_prop in server, server_aggressive
and server_static modes. I spent some days to study the degradations in some benchmarks of
SPECjvm2008 when using V6. Finally I found the reason is the propagation on MEM operands.
After trying several ways, I thought the best way is to reuse the code in early_prop. So the
two optimizations about propagations work together now and we don't miss any opportunity caught
before.

> [drlvm][jit][opt][performance] Magic for java.math.Multiplication.unsignedMultAdd2
> ----------------------------------------------------------------------------------
>
>                 Key: HARMONY-5826
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5826
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>            Reporter: Aleksey Shipilev
>         Attachments: H5826-V2.patch, H5826-V3.patch, H5826-V4.patch, H5826-V5.patch.zip,
H5826-V6.zip, H5826-V7.zip, vm-jit-math-unsignedMultAdd2-magic-rc1.patch
>
>
> Implementation of magic for java.math.Multiplication.unsignedMultAdd2, extracted in HARMONY-5825.

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