Add an overload of Preprocessor::getSpelling which takes a SmallVector and
returns a StringRef. Use it to simplify some repetitive code.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97322 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/PPDirectives.cpp b/lib/Lex/PPDirectives.cpp
index 4803c5a..976c94e 100644
--- a/lib/Lex/PPDirectives.cpp
+++ b/lib/Lex/PPDirectives.cpp
@@ -1024,13 +1024,9 @@
     return;
 
   case tok::angle_string_literal:
-  case tok::string_literal: {
-    FilenameBuffer.resize(FilenameTok.getLength());
-    const char *FilenameStart = &FilenameBuffer[0];
-    unsigned Len = getSpelling(FilenameTok, FilenameStart);
-    Filename = llvm::StringRef(FilenameStart, Len);
+  case tok::string_literal:
+    Filename = getSpelling(FilenameTok, FilenameBuffer);
     break;
-  }
 
   case tok::less:
     // This could be a <foo/bar.h> file coming from a macro expansion.  In this