Improve instruction creating/adding shorthand in HGraphBuilder

src/hydrogen-osr.cc

Index: src/hydrogen-osr.cc
diff --git a/src/hydrogen-osr.cc b/src/hydrogen-osr.cc
index 6c3d6ae3e02be1c8dcf47611b16eb04845dc6957..271e69a2097fd55860e57a8352fd82ad0ad3f874 100644
--- a/src/hydrogen-osr.cc
+++ b/src/hydrogen-osr.cc
@@ -80,7 +80,7 @@ HBasicBlock* HOsrBuilder::BuildPossibleOsrLoopEntry(
   osr_values_ = new(zone) ZoneList<HUnknownOSRValue*>(length, zone);
 
   for (int i = 0; i < first_expression_index; ++i) {
-    HUnknownOSRValue* osr_value = builder_->Add<HUnknownOSRValue>();
+    HUnknownOSRValue* osr_value = builder_->AddAndCast<HUnknownOSRValue>();
     environment->Bind(i, osr_value);
     osr_values_->Add(osr_value, zone);
   }
@@ -88,7 +88,7 @@ HBasicBlock* HOsrBuilder::BuildPossibleOsrLoopEntry(
   if (first_expression_index != length) {
     environment->Drop(length - first_expression_index);
     for (int i = first_expression_index; i < length; ++i) {
-      HUnknownOSRValue* osr_value = builder_->Add<HUnknownOSRValue>();
+      HUnknownOSRValue* osr_value = builder_->AddAndCast<HUnknownOSRValue>();
       environment->Push(osr_value);
       osr_values_->Add(osr_value, zone);
     }
@@ -96,7 +96,7 @@ HBasicBlock* HOsrBuilder::BuildPossibleOsrLoopEntry(
 
   builder_->Add<HSimulate>(osr_entry_id);
   builder_->Add<HOsrEntry>(osr_entry_id);
-  HContext* context = builder_->Add<HContext>();
+  HContext* context = builder_->AddAndCast<HContext>();
   environment->BindContext(context);
   builder_->current_block()->Goto(loop_predecessor);
   loop_predecessor->SetJoinId(statement->EntryId());