[Webkit-unassigned] [Bug 68755] New: JSVALUE32_64 DFG JIT has bugs in GetById, PutById, and GetByOffset code generation

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=68755

           Summary: JSVALUE32_64 DFG JIT has bugs in GetById, PutById, and
                    GetByOffset code generation
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: yuqiang.xian at intel.com
                CC: barraclough at apple.com, fpizlo at apple.com


In JSVALUE32_64 DFG JIT, we need to load/store and repatch both tag and payload of a property for GetById/PutById, and to reorder the loads of tag and payload for GetByOffset as the result tag GPR could reuse the storage GPR.

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