include/clang/Basic/DiagnosticGroups.td

include/clang/Basic/DiagnosticLexKinds.td

include/clang/Basic/FileManager.h

include/clang/Basic/VirtualFileSystem.h

include/clang/Lex/DirectoryLookup.h

include/clang/Lex/HeaderSearch.h

lib/Basic/FileManager.cpp

lib/Basic/VirtualFileSystem.cpp

lib/Lex/HeaderSearch.cpp

lib/Lex/PPDirectives.cpp

test/Lexer/Inputs/case-insensitive-include.h

test/Lexer/case-insensitive-include-ms.c

test/Lexer/case-insensitive-include.c

test/PCH/case-insensitive-include.c