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From "Mikhail Fursov (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-5595) [drlvm][jit][opt] Difference in bc-mapping after translator
Date Wed, 12 Mar 2008 10:20:46 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5595?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mikhail Fursov updated HARMONY-5595:
------------------------------------

    Attachment: bcmap.diff

bcmap.diff: a fix for the problem.

> [drlvm][jit][opt] Difference in bc-mapping after translator
> -----------------------------------------------------------
>
>                 Key: HARMONY-5595
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5595
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>         Environment: All
>            Reporter: Nikolay Kurtov
>            Assignee: Mikhail Fursov
>         Attachments: bcmap.diff, Test.java
>
>
> Discussion on mailing list:
> http://www.mail-archive.com/dev@harmony.apache.org/msg13158.html
> I compiled the same class with JET and OPT, and found a difference in bytecode-mapping
> One of branches of switch goes to this code:
> ;;  58) ILOAD_0                            
> ;;  59) BIPUSH          45                 
> ;;  61) IADD                               
> ;;  62) I2B                                
> ;;  63) ISTORE_1                           
> ....
> So, after the recompilation by OPT, the block should begin from bcOffset 58
> In OPT after translator I found in irdump the following block
> Block L5: 
>   Predecessors: ENTRY_L0
>   Successors: L8
>   I5:L5: bcmap:59
>   I34:ldci4     #45 -) t14:int32
>   I35:add   t1, t14 -) t15:int32
>   I36:convi1  t15 -) t16:int32
>   I37:stvar     t16 -) v1:int32
> ....
> The block begins from bcOffset 59
> I consider these values in JET and OPT should be equal.

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