From cfa46a82b8f74564522a493b9ae3e715d83d06a4 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Fri, 12 Oct 2012 00:16:50 +0000
Subject: Track which particular submodule #undef's a macro, so that the actual
 #undef only occurs if that submodule is imported.

llvm-svn: 165773
---
 clang/lib/Serialization/ASTWriter.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'clang/lib/Serialization/ASTWriter.cpp')

diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 28f78c61810..2fbe4bf6a33 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -3686,6 +3686,7 @@ void ASTWriter::WriteMacroUpdates() {
        I != E; ++I) {
     addMacroRef(I->first, Record);
     AddSourceLocation(I->second.UndefLoc, Record);
+    Record.push_back(inferSubmoduleIDFromLocation(I->second.UndefLoc));
   }
   Stream.EmitRecord(MACRO_UPDATES, Record);
 }
-- 
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