MTC added inline comments.

================
Comment at: lib/StaticAnalyzer/Checkers/IteratorChecker.cpp:399
+
+  C.addTransition(State);
 }
----------------
I have two questions may need @NoQ or @xazax.hun who is more familiar with the 
analyzer engine help to answer.

  - `State` may not change at all, do we need a check here like [[ 
https://github.com/llvm-mirror/clang/blob/master/lib/StaticAnalyzer/Checkers/ArrayBoundCheckerV2.cpp#L227
 | if (state != originalState) ]]
  - A more basic problem is that do we need `originalState = State` trick. It 
seems that `addTransitionImpl()` has a check about same state transition, see 
[[ 
https://github.com/llvm-mirror/clang/blob/master/include/clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h#L339
 | addTransitionImp() ]].

Thanks in advance!





Repository:
  rC Clang

https://reviews.llvm.org/D47417



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