[PATCH] Add new warning to Clang to detect when all code paths in a function has a call back to the function.

[Richard Trieu]

  Warn on non-templated member functions of templated classes.

http://llvm-reviews.chandlerc.com/D1864

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D1864?vs=4752&id=4900#toc

Files:
  lib/Sema/AnalysisBasedWarnings.cpp
  lib/Lex/Pragma.cpp
  test/Sema/unused-expr-system-header.c
  test/Sema/attr-deprecated.c
  test/Sema/warn-unused-function.c
  test/Parser/cxx-using-declaration.cpp
  test/Parser/expressions.c
  test/CodeGen/functions.c
  test/SemaCXX/MicrosoftCompatibility.cpp
  test/SemaCXX/warn-infinite-recursion.cpp
  test/SemaCXX/warn-bool-conversion.cpp
  test/SemaCXX/statements.cpp
  test/Lexer/gnu-flags.c
  test/Analysis/inlining/test-always-inline-size-option.c
  test/Analysis/misc-ps-region-store.cpp
  test/Analysis/cxx11-crashes.cpp
  test/FixIt/fixit.c
  test/FixIt/typo.m
  include/clang/Basic/DiagnosticSemaKinds.td
  include/clang/Basic/DiagnosticGroups.td
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