Use a common SourceManager when processing multiple files. This allows us to cache the contents of source files already loaded from disk.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@52066 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 0 deletions

diff --git a/include/clang/Basic/SourceManager.h b/include/clang/Basic/SourceManager.h
index 700dcd31ac..e5ebbf9dff 100644
--- a/include/clang/Basic/SourceManager.h
+++ b/include/clang/Basic/SourceManager.h
@@ -231,6 +231,7 @@ public:
   ~SourceManager() {}
   
   void clearIDTables() {
+    MainFileID = 0;
     FileIDs.clear();
     MacroIDs.clear();
     LastLineNoFileIDQuery = ~0U;