[PATCH] D22937: [ADT] NFC: Generalize GraphTraits requirement of "NodeType *" in interfaces to "NodeRef", and migrate SCCIterator.h to use NodeRef

[Tim Shen via llvm-commits]

timshen created this revision.
timshen added reviewers: dblaikie, chandlerc.
timshen added a subscriber: llvm-commits.

By generalize the interface, users are able to inject more flexible Node token into the algorithm, for example, a pair of vector<Node>* and index integer. Currently I only migrated SCCIterator to use NodeRef, but more is coming. It's a NFC.

https://reviews.llvm.org/D22937

Files:
  include/llvm/ADT/GraphTraits.h
  include/llvm/ADT/SCCIterator.h
  include/llvm/Analysis/CallGraph.h
  include/llvm/CodeGen/MachineBasicBlock.h
  include/llvm/IR/CFG.h
  lib/Analysis/BlockFrequencyInfoImpl.cpp
  lib/Transforms/IPO/FunctionAttrs.cpp
  unittests/ADT/SCCIteratorTest.cpp

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