diff --git a/clang/lib/CodeGen/CGStmt.cpp b/clang/lib/CodeGen/CGStmt.cpp
index eb7697d3b1b1..441047e1bc50 100644
--- a/clang/lib/CodeGen/CGStmt.cpp
+++ b/clang/lib/CodeGen/CGStmt.cpp
@@ -726,7 +726,7 @@ SimplifyConstraint(const char *Constraint, TargetInfo &Target,
 }
 
 llvm::Value* CodeGenFunction::EmitAsmInput(const AsmStmt &S,
-                                           TargetInfo::ConstraintInfo Info, 
+                                         const TargetInfo::ConstraintInfo &Info,
                                            const Expr *InputExpr,
                                            std::string &ConstraintStr) {
   llvm::Value *Arg;
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 04c0026d8e6f..0729ae2d6950 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -801,7 +801,8 @@ private:
   void ExpandTypeToArgs(QualType Ty, RValue Src,
                         llvm::SmallVector<llvm::Value*, 16> &Args);
 
-  llvm::Value* EmitAsmInput(const AsmStmt &S, TargetInfo::ConstraintInfo Info,
+  llvm::Value* EmitAsmInput(const AsmStmt &S, 
+                            const TargetInfo::ConstraintInfo &Info,
                             const Expr *InputExpr, std::string &ConstraintStr);
 
   /// EmitCleanupBlock - emits a single cleanup block.