[cfe-commits] [PATCH] Compatibility macro detection for the -Wimplicit-fallthrough diagnostic.

[Alexander Kornienko]

  * replaced "SM.getFileEntryForID(SM.getFileID(L))" with a simple "L.isValid()" check (for macros defined on a command line);
  * compare token sequences instead of spelling.

Hi doug.gregor, rsmith,

http://llvm-reviews.chandlerc.com/D50

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D50?vs=131&id=133#toc

Files:
  tools/clang/test/SemaCXX/switch-implicit-fallthrough-macro.cpp
  tools/clang/include/clang/Basic/DiagnosticSemaKinds.td
  tools/clang/include/clang/Lex/MacroInfo.h
  tools/clang/lib/Sema/AnalysisBasedWarnings.cpp
  tools/clang/lib/Lex/MacroInfo.cpp
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