diff --git a/llvm/include/llvm/IR/DebugLoc.h b/llvm/include/llvm/IR/DebugLoc.h
index 780d17a33661f8..4914d733fe0da8 100644
--- a/llvm/include/llvm/IR/DebugLoc.h
+++ b/llvm/include/llvm/IR/DebugLoc.h
@@ -85,7 +85,7 @@ namespace llvm {
     /// the chain now is inlined-at the new call site.
     /// \param   InlinedAt    The new outermost inlined-at in the chain.
     /// \param   ReplaceLast  Replace the last location in the inlined-at chain.
-    static DebugLoc appendInlinedAt(DebugLoc DL, DILocation *InlinedAt,
+    static DebugLoc appendInlinedAt(const DebugLoc &DL, DILocation *InlinedAt,
                                     LLVMContext &Ctx,
                                     DenseMap<const MDNode *, MDNode *> &Cache,
                                     bool ReplaceLast = false);
diff --git a/llvm/lib/IR/DebugLoc.cpp b/llvm/lib/IR/DebugLoc.cpp
index 14d1396f154339..e945cbcba78254 100644
--- a/llvm/lib/IR/DebugLoc.cpp
+++ b/llvm/lib/IR/DebugLoc.cpp
@@ -79,7 +79,7 @@ DebugLoc DebugLoc::get(unsigned Line, unsigned Col, const MDNode *Scope,
                          const_cast<MDNode *>(InlinedAt), ImplicitCode);
 }
 
-DebugLoc DebugLoc::appendInlinedAt(DebugLoc DL, DILocation *InlinedAt,
+DebugLoc DebugLoc::appendInlinedAt(const DebugLoc &DL, DILocation *InlinedAt,
                                    LLVMContext &Ctx,
                                    DenseMap<const MDNode *, MDNode *> &Cache,
                                    bool ReplaceLast) {