diff --git a/clang/lib/CodeGen/CGCXXABI.h b/clang/lib/CodeGen/CGCXXABI.h
--- a/clang/lib/CodeGen/CGCXXABI.h
+++ b/clang/lib/CodeGen/CGCXXABI.h
@@ -41,6 +41,8 @@
 
 /// Implements C++ ABI-specific code generation functions.
 class CGCXXABI {
+  friend class CodeGenModule;
+
 protected:
   CodeGenModule &CGM;
   std::unique_ptr<MangleContext> MangleCtx;
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -7000,4 +7000,6 @@
          "Still have (unmerged) EmittedDeferredDecls deferred decls");
 
   NewBuilder->EmittedDeferredDecls = std::move(EmittedDeferredDecls);
+
+  NewBuilder->ABI->MangleCtx = std::move(ABI->MangleCtx);
 }
diff --git a/clang/test/Interpreter/execute.cpp b/clang/test/Interpreter/execute.cpp
--- a/clang/test/Interpreter/execute.cpp
+++ b/clang/test/Interpreter/execute.cpp
@@ -5,6 +5,7 @@
 // UNSUPPORTED: system-aix
 // CHECK-DRIVER: i = 10
 // RUN: cat %s | clang-repl | FileCheck %s
+// RUN: cat %s | clang-repl -Xcc -O2 | FileCheck %s
 extern "C" int printf(const char *, ...);
 int i = 42;
 auto r1 = printf("i = %d\n", i);