r236454 - [modules] Don't bother registering loaded macros if there are none.

[Richard Smith]

Author: rsmith
Date: Mon May  4 14:58:00 2015
New Revision: 236454

URL: http://llvm.org/viewvc/llvm-project?rev=236454&view=rev
Log:
[modules] Don't bother registering loaded macros if there are none.

We don't yet have a reduced testcase for this.

Modified:
    cfe/trunk/lib/Serialization/ASTReader.cpp

Modified: cfe/trunk/lib/Serialization/ASTReader.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Serialization/ASTReader.cpp?rev=236454&r1=236453&r2=236454&view=diff
==============================================================================
--- cfe/trunk/lib/Serialization/ASTReader.cpp (original)
+++ cfe/trunk/lib/Serialization/ASTReader.cpp Mon May  4 14:58:00 2015
@@ -1829,7 +1829,8 @@ void ASTReader::resolvePendingMacro(Iden
     Earliest = MD;
   }
 
-  PP.setLoadedMacroDirective(II, Latest);
+  if (Latest)
+    PP.setLoadedMacroDirective(II, Latest);
 }
 
 ASTReader::InputFileInfo