[Webkit-unassigned] [Bug 70256] New: Live range splitting bug

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Oct 17 12:34:58 PDT 2011


           Summary: Live range splitting bug
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: oliver at apple.com
                CC: fpizlo at apple.com

There's a live range splitting issue with this nested loop:
function f(a) {
    for (var i = 0; i < 100; i++)
        for (var j = 0; j < a.length; j++)
            a[j] =j;

We end up predicting j as Int32|Other rather than Int32

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