[Webkit-unassigned] [Bug 69720] New: JSVALUE32_64 DFG JIT - fillJSValue with a pair of GPRs should not set the registerFormat to be DataFormatJSDouble

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun Oct 9 04:21:58 PDT 2011


https://bugs.webkit.org/show_bug.cgi?id=69720

           Summary: JSVALUE32_64 DFG JIT - fillJSValue with a pair of GPRs
                    should not set the registerFormat to be
                    DataFormatJSDouble
           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, DataFormatJSDouble is assumed to be represented by a FPR and will be used for further optimizations, though we currently don't fully utilize it. For now when filling a JS value which was spilled as a JSDouble with a pair of GPRs, we'll set the registerFormat to DataFormatJS to avoid compilation errors.

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