[interpreter] Support for ES6 class literals.

src/compiler/bytecode-graph-builder.cc

Index: src/compiler/bytecode-graph-builder.cc
diff --git a/src/compiler/bytecode-graph-builder.cc b/src/compiler/bytecode-graph-builder.cc
index 83ff7b7b27099358aa37c6977e95388c439c7eff..bbc70adcf7e196bae4fa86f3d40a75c17faf20ff 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -963,6 +963,13 @@ void BytecodeGraphBuilder::VisitKeyedStoreICStrictWide() {
   BuildKeyedStore();
 }
 
+void BytecodeGraphBuilder::VisitLdaInitialMap() {
+  Node* js_function = environment()->LookupAccumulator();
+  Node* load = BuildLoadObjectField(js_function,
+                                    JSFunction::kPrototypeOrInitialMapOffset);
+  environment()->BindAccumulator(load);
+}
+
 void BytecodeGraphBuilder::VisitPushContext() {
   Node* new_context = environment()->LookupAccumulator();
   environment()->BindRegister(bytecode_iterator().GetRegisterOperand(0),