tree ad69d51cf4ab796f61eb54ee7ebd57ba79f60415
parent e847b6ab746428a595568f47e9d242fe6ee9c7a9
author Chris Lattner <clattner@google.com> 1537566874 -0700
committer jpienaar <jpienaar@google.com> 1553890655 -0700

Move the GraphTraits implementations for CFGs out to their own header,
consolidate the implementations in CFGFunctionViewGraph.cpp into it, and
implement the missing const specializations for functions.  NFC.

PiperOrigin-RevId: 214048649