[Webkit-unassigned] [Bug 141169] New: REGRESSION(r179477): arguments simplification no longer works

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=141169

            Bug ID: 141169
           Summary: REGRESSION(r179477): arguments simplification no
                    longer works
    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

That change broke arguments simplification because PhantomLocal on the arguments register tells arguments simplification that it can't simplify anything.  PhantomLocal also confuses the Flush strength reduction and we were also missing some other cases there.  This resolves all of those issues.

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