[llvm] r266751 - IR: Use Optional instead of unique_ptr for Metadata map in ValueMap, NFC

[Duncan P. N. Exon Smith via llvm-commits]

Author: dexonsmith
Date: Tue Apr 19 11:17:48 2016
New Revision: 266751

URL: http://llvm.org/viewvc/llvm-project?rev=266751&view=rev
Log:
IR: Use Optional instead of unique_ptr for Metadata map in ValueMap, NFC

Modified:
    llvm/trunk/include/llvm/IR/ValueMap.h

Modified: llvm/trunk/include/llvm/IR/ValueMap.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/ValueMap.h?rev=266751&r1=266750&r2=266751&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/ValueMap.h (original)
+++ llvm/trunk/include/llvm/IR/ValueMap.h Tue Apr 19 11:17:48 2016
@@ -85,7 +85,7 @@ class ValueMap {
   typedef DenseMap<const Metadata *, TrackingMDRef> MDMapT;
   typedef typename Config::ExtraData ExtraData;
   MapT Map;
-  std::unique_ptr<MDMapT> MDMap;
+  Optional<MDMapT> MDMap;
   ExtraData Data;
 
   bool MayMapMetadata = true;
@@ -106,7 +106,7 @@ public:
   bool hasMD() const { return bool(MDMap); }
   MDMapT &MD() {
     if (!MDMap)
-      MDMap.reset(new MDMapT);
+      MDMap.emplace();
     return *MDMap;
   }