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Posted to commits@harmony.apache.org by "Maksim Ananjev (JIRA)" <ji...@apache.org> on 2007/12/01 11:25:43 UTC
[jira] Commented: (HARMONY-5090) [drlvm][jit][opt]operator strength
reduction
[ https://issues.apache.org/jira/browse/HARMONY-5090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12547408 ]
Maksim Ananjev commented on HARMONY-5090:
-----------------------------------------
Folks,
Thanks for your reports and fixes. That's an obvious hint for me to be much more extensive in inspecting and testing my patches.
> [drlvm][jit][opt]operator strength reduction
> --------------------------------------------
>
> Key: HARMONY-5090
> URL: https://issues.apache.org/jira/browse/HARMONY-5090
> Project: Harmony
> Issue Type: New Feature
> Components: DRLVM
> Environment: Hope it works everywhere
> Reporter: Maksim Ananjev
> Assignee: Egor Pasko
> Priority: Minor
> Attachments: HARMONY-5090.patch, HARMONY-5090.patch, HARMONY-5090.patch, HARMONY-5090.patch
>
>
> Operator Strength Reduction is an optimization that reformulates costly operations in terms of less expensive ones.
> The simplest possible example is the following:
> before:
> int sum = 0;
> for(int i=0; i<10;i++){
> int temp = i * 10;
> sum+=temp
> }
> after:
> int sum = 0;
> for(int j=0; j<100; j+=10){
> sum+=j
> }
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