Add missing header guards.

llvm-svn: 215202
diff --git a/clang/tools/diagtool/DiagnosticNames.h b/clang/tools/diagtool/DiagnosticNames.h
index 2571b19..95be7b2 100644
--- a/clang/tools/diagtool/DiagnosticNames.h
+++ b/clang/tools/diagtool/DiagnosticNames.h
@@ -7,6 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef DIAGTOOL_DIAGNOSTICNAMES_H
+#define DIAGTOOL_DIAGNOSTICNAMES_H
+
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/DataTypes.h"
@@ -112,3 +115,4 @@
   }
 } // end namespace diagtool
 
+#endif
diff --git a/clang/tools/libclang/IndexingContext.h b/clang/tools/libclang/IndexingContext.h
index c3851cd7..09207ba 100644
--- a/clang/tools/libclang/IndexingContext.h
+++ b/clang/tools/libclang/IndexingContext.h
@@ -7,6 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_CLANG_LIBCLANG_INDEXINGCONTEXT_H
+#define LLVM_CLANG_LIBCLANG_INDEXINGCONTEXT_H
+
 #include "CXCursor.h"
 #include "Index_Internal.h"
 #include "clang/AST/DeclGroup.h"
@@ -517,3 +520,5 @@
 }
 
 }} // end clang::cxindex
+
+#endif
diff --git a/clang/unittests/AST/MatchVerifier.h b/clang/unittests/AST/MatchVerifier.h
index 1e5a0d2..e659391 100644
--- a/clang/unittests/AST/MatchVerifier.h
+++ b/clang/unittests/AST/MatchVerifier.h
@@ -16,6 +16,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_CLANG_UNITTESTS_AST_MATCHVERIFIER_H
+#define LLVM_CLANG_UNITTESTS_AST_MATCHVERIFIER_H
+
 #include "clang/AST/ASTContext.h"
 #include "clang/ASTMatchers/ASTMatchFinder.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
@@ -288,3 +291,5 @@
 
 } // end namespace ast_matchers
 } // end namespace clang
+
+#endif
diff --git a/clang/utils/TableGen/TableGenBackends.h b/clang/utils/TableGen/TableGenBackends.h
index 78745f1..4adf368 100644
--- a/clang/utils/TableGen/TableGenBackends.h
+++ b/clang/utils/TableGen/TableGenBackends.h
@@ -13,6 +13,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_CLANG_UTILS_TABLEGEN_TABLEGENBACKENDS_H
+#define LLVM_CLANG_UTILS_TABLEGEN_TABLEGENBACKENDS_H
+
 #include <string>
 
 namespace llvm {
@@ -68,3 +71,5 @@
 void EmitClangAttrDocs(RecordKeeper &Records, raw_ostream &OS);
 
 } // end namespace clang
+
+#endif