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From "Nikolay Sidelnikov (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-2686) [drlvm][jit][opt] Jitrino doesn't remove unnesassary conditional jumps after constants compare
Date Mon, 18 Dec 2006 13:35:25 GMT
     [ http://issues.apache.org/jira/browse/HARMONY-2686?page=all ]

Nikolay Sidelnikov updated HARMONY-2686:
----------------------------------------

    Attachment: BranchTranslator_v1.2.patch

new patch was attached, several bugs were fixed (crashes on SPECjbb2005)

> [drlvm][jit][opt] Jitrino doesn't remove unnesassary conditional jumps after constants
compare
> ----------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-2686
>                 URL: http://issues.apache.org/jira/browse/HARMONY-2686
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>            Reporter: Nikolay Sidelnikov
>         Attachments: branchTranslator.patch, BranchTranslator_fixed.patch, BranchTranslator_v1.2.patch
>
>
> There are number of  cases when Jitrino is able to remove a branch. For example:
> 1)
>        MOV eax, 1
>        CMP eax, 0
>        JZ 
> 2)
>        MOV eax, 1
>        JMP L1
>        MOV eax, 0
> L1: CMP eax, 0
>        JZ

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