[Webkit-unassigned] [Bug 232132] New: Remove unneeded Heap::m_vm.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=232132

            Bug ID: 232132
           Summary: Remove unneeded Heap::m_vm.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mark.lam at apple.com

Heap::vm() already computes the associated VM& using offset math.  This entails subtracting a constant to Heap's this pointer, which is faster than loading from a field.

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