[Webkit-unassigned] [Bug 148544] New: LICMPhase should correct the values of the Check flags of hoisted nodes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=148544

            Bug ID: 148544
           Summary: LICMPhase should correct the values of the Check flags
                    of hoisted nodes
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local 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

It's appropriate for a DFG phase to assume that the Check flags are correct (i.e. lack of Check flag means that something was proved to not need a check), so LICM should make sure to set those flags if it hoists something that would need a check in the loop pre-header even though it maybe doesn't in the loop.

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