[Webkit-unassigned] [Bug 76770] Loop invariant code motion in JSC DFG

Wed Feb 1 01:37:36 PST 2012

https://bugs.webkit.org/show_bug.cgi?id=76770

Yuqiang Xian <yuqiang.xian at intel.com> changed:

           What    |Removed                     |Added
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 Attachment #124682|0                           |1
        is obsolete|                            |

--- Comment #3 from Yuqiang Xian <yuqiang.xian at intel.com>  2012-02-01 01:37:36 PST ---
Created an attachment (id=124904)
 --> (https://bugs.webkit.org/attachment.cgi?id=124904&action=review)
WIP patch

This patch fixed the performance regression on the SunSpider benchmark, which was caused by that LICM revealed some CFA analysis problems and caused OSR failures. With this fix also no obvious performance regression is observed on Kraken or V8. But seems two cases having correctness problem: v8-crypto and kraken imaging-gaussian-blur. Still under investigation.

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