1 files changed, 10 insertions, 4 deletions
diff --git a/include/llvm/Transforms/IPO/PassManagerBuilder.h b/include/llvm/Transforms/IPO/PassManagerBuilder.h
index 75631b3..3648a3d 100644
--- a/include/llvm/Transforms/IPO/PassManagerBuilder.h
+++ b/include/llvm/Transforms/IPO/PassManagerBuilder.h
@@ -18,10 +18,16 @@
 #include <vector>
 
 namespace llvm {
-  class TargetLibraryInfo;
-  class PassManagerBase;
-  class Pass;
-  class FunctionPassManager;
+class TargetLibraryInfo;
+class Pass;
+
+// The old pass manager infrastructure is hidden in a legacy namespace now.
+namespace legacy {
+class PassManagerBase;
+class FunctionPassManager;
+}
+using legacy::PassManagerBase;
+using legacy::FunctionPassManager;
 
 /// PassManagerBuilder - This class is used to set up a standard optimization
 /// sequence for languages like C and C++, allowing some APIs to customize the