Index: llvm/trunk/include/llvm/Analysis/ScalarEvolution.h
===================================================================
--- llvm/trunk/include/llvm/Analysis/ScalarEvolution.h
+++ llvm/trunk/include/llvm/Analysis/ScalarEvolution.h
@@ -782,13 +782,13 @@
 
   /// Set the memoized range for the given SCEV.
   const ConstantRange &setRange(const SCEV *S, RangeSignHint Hint,
-                                const ConstantRange &CR) {
+                                ConstantRange &&CR) {
     DenseMap<const SCEV *, ConstantRange> &Cache =
         Hint == HINT_RANGE_UNSIGNED ? UnsignedRanges : SignedRanges;
 
-    auto Pair = Cache.insert({S, CR});
+    auto Pair = Cache.try_emplace(S, std::move(CR));
     if (!Pair.second)
-      Pair.first->second = CR;
+      Pair.first->second = std::move(CR);
     return Pair.first->second;
   }
 
Index: llvm/trunk/lib/Analysis/ScalarEvolution.cpp
===================================================================
--- llvm/trunk/lib/Analysis/ScalarEvolution.cpp
+++ llvm/trunk/lib/Analysis/ScalarEvolution.cpp
@@ -4800,7 +4800,7 @@
       }
     }
 
-    return setRange(AddRec, SignHint, ConservativeResult);
+    return setRange(AddRec, SignHint, std::move(ConservativeResult));
   }
 
   if (const SCEVUnknown *U = dyn_cast<SCEVUnknown>(S)) {
@@ -4831,10 +4831,10 @@
                           APInt::getSignedMaxValue(BitWidth).ashr(NS - 1) + 1));
     }
 
-    return setRange(U, SignHint, ConservativeResult);
+    return setRange(U, SignHint, std::move(ConservativeResult));
   }
 
-  return setRange(S, SignHint, ConservativeResult);
+  return setRange(S, SignHint, std::move(ConservativeResult));
 }
 
 // Given a StartRange, Step and MaxBECount for an expression compute a range of