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Posted to commits@harmony.apache.org by "Mikhail Fursov (JIRA)" <ji...@apache.org> on 2008/03/17 16:13:31 UTC
[jira] Resolved: (HARMONY-5580) [drlvm][jitrino][opt][perf] branch
translator enhancement
[ https://issues.apache.org/jira/browse/HARMONY-5580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mikhail Fursov resolved HARMONY-5580.
-------------------------------------
Resolution: Fixed
committed revision r637835
> [drlvm][jitrino][opt][perf] branch translator enhancement
> ---------------------------------------------------------
>
> Key: HARMONY-5580
> URL: https://issues.apache.org/jira/browse/HARMONY-5580
> Project: Harmony
> Issue Type: Improvement
> Components: DRLVM
> Environment: IA32
> Reporter: Dmitry Pronichkin
> Assignee: Mikhail Fursov
> Attachments: btr.patch, btr2.diff, btr3.patch
>
>
> The patch introduces new way of branch elimination. It eliminates branches like this:
> if (x<0) {
> x+=y;
> }
> transforming them in following assembly:
> mov tmp, x
> sar tmp, 31 (spreading sign for the whole value)
> and tmp, y (moving "y" in tmp if x<0)
> add x, tmp
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