RESOLVED FIXED 153518
B3's integer range analysis should know that Mul'ing two sufficiently small numbers will yield a number that still has a meaningful range 
https://bugs.webkit.org/show_bug.cgi?id=153518
Summary B3's integer range analysis should know that Mul'ing two sufficiently small n...
Filip Pizlo
Reported 2016-01-26 15:25:27 PST
I almost added these optimizations to the DFG integer range optimization phase. That phase is very complicated. B3's integer range analysis is trivial. So I added it to B3. Eventually we'll want this same machinery in DFG also.
Attachments
the patch (6.95 KB, patch)
2016-01-26 15:27 PST, Filip Pizlo 		benjamin: review+
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Filip Pizlo
Comment 1 2016-01-26 15:27:47 PST
Created attachment 269936 [details] the patch
WebKit Commit Bot
Comment 2 2016-01-26 15:30:42 PST
Attachment 269936 [details] did not pass style-queue: ERROR: Source/JavaScriptCore/b3/B3ReduceStrength.cpp:1968: Multi line control clauses should use braces. [whitespace/braces] [4] Total errors found: 1 in 3 files If any of these errors are false positives, please file a bug against check-webkit-style.
Filip Pizlo
Comment 3 2016-01-26 16:49:27 PST
Landed in http://trac.webkit.org/changeset/195637
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