diff --git a/lib/Basic/SourceLocation.cpp b/lib/Basic/SourceLocation.cpp
index eaf129f..c014475 100644
--- a/lib/Basic/SourceLocation.cpp
+++ b/lib/Basic/SourceLocation.cpp
@@ -48,16 +48,27 @@
   return FullSourceLoc(SrcMgr->getIncludeLoc(Loc),*SrcMgr);
 }
 
-unsigned FullSourceLoc::getLineNumber() {
+unsigned FullSourceLoc::getLineNumber() const {
   assert (isValid());
   return SrcMgr->getLineNumber(Loc);
 }
 
-unsigned FullSourceLoc::getColumnNumber() {
+unsigned FullSourceLoc::getColumnNumber() const {
   assert (isValid());
   return SrcMgr->getColumnNumber(Loc);
 }
 
+
+unsigned FullSourceLoc::getLogicalLineNumber() const {
+  assert (isValid());
+  return SrcMgr->getLogicalLineNumber(Loc);
+}
+
+unsigned FullSourceLoc::getLogicalColumnNumber() const {
+  assert (isValid());
+  return SrcMgr->getLogicalColumnNumber(Loc);
+}
+
 const char* FullSourceLoc::getSourceName() const {
   assert (isValid());
   return SrcMgr->getSourceName(Loc);