[PATCH] Add -Wrange-loop-analysis to warn when a range-based for-loop is creating a copy.

[Richard Trieu]

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D4169

Files:
  cfe/trunk/include/clang/Basic/DiagnosticGroups.td
  cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
  cfe/trunk/lib/Sema/SemaStmt.cpp
  cfe/trunk/test/SemaCXX/warn-range-loop-analysis.cpp

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