DFGNode.h nominally contains the Node class and things directly related to it. But right now it also happens to contain a bunch of #define's relating to the DFG's configuration, as well as some common types that the DFG uses everywhere (like BlockIndex and NodeIndex). These should be moved into a separate file, so that it is possible to refer to those types without having to pull in the definition of Node.
Created attachment 114161 [details] the patch Checking to see if this makes bots happy.
Landed in http://trac.webkit.org/changeset/99627