[Webkit-unassigned] [Bug 144525] New: DFG::LICMPhase should attempt to hoist edge type checks if hoisting the whole node fails

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=144525

            Bug ID: 144525
           Summary: DFG::LICMPhase should attempt to hoist edge type
                    checks if hoisting the whole node fails
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

This usually isn't super necessary because the CPS type check hoisting - done in FixupPhase by putting checks on SetLocals - does a pretty good job.  But it only covers the super common types and sometimes it will not do anything if the VariableAccessData looks sketchy.  So, LICMPhase does have an opportunity here for some small additional speed-up.

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