Unbox/Box Float64x2 and inline typed array loads and stores

runtime/vm/object.cc

Index: runtime/vm/object.cc
diff --git a/runtime/vm/object.cc b/runtime/vm/object.cc
index f87a9f566fcb524c3d6f0bd973b858e0216c1fdd..cf5a22e0ca8c6b82a797fb758061182dce51b8d8 100644
--- a/runtime/vm/object.cc
+++ b/runtime/vm/object.cc
@@ -12408,6 +12408,12 @@ bool AbstractType::IsFloat32x4Type() const {
 }
 
 
+bool AbstractType::IsFloat64x2Type() const {
+  return HasResolvedTypeClass() &&
+      (type_class() == Type::Handle(Type::Float64x2()).type_class());
+}
+
+
 bool AbstractType::IsInt32x4Type() const {
   return HasResolvedTypeClass() &&
       (type_class() == Type::Handle(Type::Int32x4()).type_class());
@@ -12576,6 +12582,11 @@ RawType* Type::Float32x4() {
 }
 
 
+RawType* Type::Float64x2() {
+  return Isolate::Current()->object_store()->float64x2_type();
+}
+
+
 RawType* Type::Int32x4() {
   return Isolate::Current()->object_store()->int32x4_type();
 }