[Webkit-unassigned] [Bug 154808] NewRegexp should not prevent inlining

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=154808

--- Comment #8 from Filip Pizlo <fpizlo at apple.com> ---
Comment on attachment 286601
  --> https://bugs.webkit.org/attachment.cgi?id=286601
Patch

You shouldn't be adding any new fields to CodeBlock. 

The DFG already has a mechanism for strongly marking objects known to the compiler such as the RegExps. It's called freezing: just do m_graph.freezeStrongly(...). 

You don't need to record the RegExp object anywhere other than the NewRegExp node. That node should not have an index into any vectors. It should just hold a pointer to RegExp. We already do this for other node types. See for example Node::cellOperand(). Notice that its already compatible with freezing.

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