[Webkit-unassigned] [Bug 147950] New: DFG::ByteCodeParser should attempt constant folding on loads from structures that are DFG-watchable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=147950

            Bug ID: 147950
           Summary: DFG::ByteCodeParser should attempt constant folding on
                    loads from structures that are DFG-watchable
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

We accidentally broke the ByteCodeParser's constant folding of loads from constants with DFG-watchable structures in http://trac.webkit.org/changeset/188292.  The constant folding would happen later, but there are some constant folding rules that only the ByteCodeParser is capable of, particularly with things like CreateThis.

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