[Webkit-unassigned] [Bug 152232] New: SExt32(SExt8(value)) and SExt32(SExt16(value)) should lower to movsbq and movswq on x86

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152232

            Bug ID: 152232
           Summary: SExt32(SExt8(value)) and SExt32(SExt16(value)) should
                    lower to movsbq and movswq on x86
    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

Currently we do the two sign extensions separately.

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