[Webkit-unassigned] [Bug 142921] New: DFG IR should represent the various of effects of put_by_id in a single node

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142921

            Bug ID: 142921
           Summary: DFG IR should represent the various of effects of
                    put_by_id in a single node
    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

Currently put_by_id may turn into a three-node lowering: AllocatePropertyStorage, PutByOffset, PutStructure.  This barely works.  We should use a single node ("PutByOffsetWithPropertyAllocationTransition", or something with a shorter name) so that code motion of things that GC and exit doesn't have to tiptoe around this.

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