2 files changed, 18 insertions, 0 deletions
diff --git a/clang/lib/Lex/PPDirectives.cpp b/clang/lib/Lex/PPDirectives.cpp
index ef26aeb79a6..ec5b67fb788 100644
--- a/clang/lib/Lex/PPDirectives.cpp
+++ b/clang/lib/Lex/PPDirectives.cpp
@@ -991,6 +991,12 @@ void Preprocessor::HandleDefineDirective(Token &DefineTok) {
   if (MI->isObjectLike()) {
     // Object-like macros are very simple, just read their body.
     while (Tok.isNot(tok::eom)) {
+      // If this token has a virtual location, resolve it down to its spelling
+      // location.  This is not strictly needed, but avoids extra resolutions
+      // for macros that are expanded frequently.
+      if (!Tok.getLocation().isFileID())
+        Tok.setLocation(SourceMgr.getSpellingLoc(Tok.getLocation()));
+      
       MI->AddTokenToBody(Tok);
       // Get the next token of the macro.
       LexUnexpandedToken(Tok);
@@ -1000,6 +1006,12 @@ void Preprocessor::HandleDefineDirective(Token &DefineTok) {
     // Otherwise, read the body of a function-like macro.  This has to validate
     // the # (stringize) operator.
     while (Tok.isNot(tok::eom)) {
+      // If this token has a virtual location, resolve it down to its spelling
+      // location.  This is not strictly needed, but avoids extra resolutions
+      // for macros that are expanded frequently.
+      if (!Tok.getLocation().isFileID())
+        Tok.setLocation(SourceMgr.getSpellingLoc(Tok.getLocation()));
+      
       MI->AddTokenToBody(Tok);
 
       // Check C99 6.10.3.2p1: ensure that # operators are followed by macro
diff --git a/clang/lib/Lex/PPMacroExpansion.cpp b/clang/lib/Lex/PPMacroExpansion.cpp
index 63caafaf504..518c84e8c38 100644
--- a/clang/lib/Lex/PPMacroExpansion.cpp
+++ b/clang/lib/Lex/PPMacroExpansion.cpp
@@ -340,6 +340,12 @@ MacroArgs *Preprocessor::ReadFunctionLikeMacroArgs(Token &MacroName,
           if (!MI->isEnabled())
             Tok.setFlag(Token::DisableExpand);
       }
+      
+      // If this token has instantiation location, resolve it down to its
+      // spelling location.  This is not strictly needed, but avoids extra
+      // resolutions for macros that are expanded frequently.
+      if (!Tok.getLocation().isFileID())
+        Tok.setLocation(SourceMgr.getSpellingLoc(Tok.getLocation()));
   
       ArgTokens.push_back(Tok);
     }