track "just a little more" location information for macro instantiations.
Now instead of just tracking the expansion history, also track the full
range of the macro that got replaced.  For object-like macros, this doesn't
change anything.  For _Pragma and function-like macros, this means we track
the locations of the ')'.

This is required for PR3579 because apparently GCC uses the line of the ')'
of a function-like macro as the location to expand __LINE__ to.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64601 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index d769720..cf7306a 100644
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -277,7 +277,8 @@
   SourceLocation Loc = ScratchBuf->getToken(Buf, Len, DestPtr);
   
   if (InstantiationLoc.isValid())
-    Loc = SourceMgr.createInstantiationLoc(Loc, InstantiationLoc, Len);
+    Loc = SourceMgr.createInstantiationLoc(Loc, InstantiationLoc,
+                                           InstantiationLoc, Len);
   Tok.setLocation(Loc);
   
   // If this is a literal token, set the pointer data.