[Webkit-unassigned] [Bug 74230] DFG ArithMul power-of-two case does not check for overflow

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Dec 9 17:50:04 PST 2011


--- Comment #2 from Filip Pizlo <fpizlo at apple.com>  2011-12-09 17:50:04 PST ---
Given how difficult it is to test whether a left-shift overflowed, and the number of registers it would burn, and the speed with which Intel chips do imull, I think the best thing to do is to disable that code-path - provided it isn't too gigantic of a slow-down.

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