NEW 185784
DFG MatchStructure should have an UntypedUse overload 
https://bugs.webkit.org/show_bug.cgi?id=185784
Summary DFG MatchStructure should have an UntypedUse overload
Filip Pizlo
Reported 2018-05-18 14:17:43 PDT
So that we can quickly return "false" in case of "primitive instanceof Foo"
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