Make use of std::inserter. NFC.

Author: jayfoad

llvm/lib/Support/DeltaAlgorithm.cpp

@@ -83,9 +83,9 @@ bool DeltaAlgorithm::Search(const changeset_ty &Changes,
     if (Sets.size() > 2) {
       // FIXME: This is really slow.
       changeset_ty Complement;
-      std::set_difference(
-        Changes.begin(), Changes.end(), it->begin(), it->end(),
-        std::insert_iterator<changeset_ty>(Complement, Complement.begin()));
+      std::set_difference(Changes.begin(), Changes.end(), it->begin(),
+                          it->end(),
+                          std::inserter(Complement, Complement.begin()));
       if (GetTestResult(Complement)) {
         changesetlist_ty ComplementSets;
         ComplementSets.insert(ComplementSets.end(), Sets.begin(), it);

llvm/utils/TableGen/AsmMatcherEmitter.cpp

@@ -1269,9 +1269,9 @@ void AsmMatcherInfo::buildRegisterClasses(
       }
 
       RegisterSet Tmp;
-      std::insert_iterator<RegisterSet> II(Tmp, Tmp.begin());
       std::set_intersection(ContainingSet.begin(), ContainingSet.end(),
-                            RS.begin(), RS.end(), II, LessRecordByID());
+                            RS.begin(), RS.end(),
+                            std::inserter(Tmp, Tmp.begin()), LessRecordByID());
       ContainingSet = std::move(Tmp);
     }