Use ArrayRef<MVT::SimpleValueType> when possible.

Not passing vector references around makes it possible to use
SmallVector in most places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177235 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 72fb771..4fb96fb 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -57,7 +57,7 @@
 }
 
 
-EEVT::TypeSet::TypeSet(const std::vector<MVT::SimpleValueType> &VTList) {
+EEVT::TypeSet::TypeSet(ArrayRef<MVT::SimpleValueType> VTList) {
   assert(!VTList.empty() && "empty list?");
   TypeVec.append(VTList.begin(), VTList.end());
 
@@ -76,7 +76,7 @@
                                           bool (*Pred)(MVT::SimpleValueType),
                                           const char *PredicateName) {
   assert(isCompletelyUnknown());
-  const std::vector<MVT::SimpleValueType> &LegalTypes =
+  ArrayRef<MVT::SimpleValueType> LegalTypes =
     TP.getDAGPatterns().getTargetInfo().getLegalValueTypes();
 
   if (TP.hasError())