[Webkit-unassigned] [Bug 22716] New: Add a RareData struct to CodeBlock for rarely used members

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=22716

           Summary: Add a RareData struct to CodeBlock for rarely used
                    members
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: sam at webkit.org


RareData strategy based on this data gathered after a run of membuster-head:

Number of CodeBlocks with instructions: 5585
Number of CodeBlocks with CtiReturnAddressVPCMap: 5585
Number of CodeBlocks with lineInfo: 5524
Number of CodeBlocks with expressionInfo: 5301
Number of CodeBlocks with constantRegisters: 5057
Number of CodeBlocks with identifiers: 5007
Number of CodeBlocks with propertyAccessInstructions: 4981
Number of CodeBlocks with callLinkInfos: 4521
Number of CodeBlocks with SymbolTable: 4452
Number of CodeBlocks with linkedCallerList: 1401
Number of CodeBlocks with globalResolveInstructions: 1092
Number of CodeBlocks with functionExpressions: 1031
Number of CodeBlocks with regexps: 304
Number of CodeBlocks with functions: 176
Number of CodeBlocks with exceptionHandlers: 162
Number of CodeBlocks with stringSwitchJumpTables: 19
Number of CodeBlocks with EvalCodeCache: 10
Number of CodeBlocks with immediateSwitchJumpTables: 8
Number of CodeBlocks with unexpectedConstants: 0
Number of CodeBlocks with characterSwitchJumpTables: 0


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