[Webkit-unassigned] [Bug 152160] New: At an OSR exit, FTL should select from all legal exit origins based on which one involves the least live state

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152160

            Bug ID: 152160
           Summary: At an OSR exit, FTL should select from all legal exit
                    origins based on which one involves the least live
                    state
    Classification: Unclassified
           Product: WebKit
           Version: WebKit 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

If you have multiple exit origins in a row and none of them involves non-SideState effects, then FTL OSR exit could pick any one of them.  So, FTL should pick the one that requires the least live state.

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