[Interpreter] Adds support for DeleteLookupSlot to Interpreter.

src/compiler/bytecode-graph-builder.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/bytecode-graph-builder.h"
 
 #include "src/compiler/bytecode-branch-analysis.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/operator-properties.h"
 #include "src/interpreter/bytecodes.h"
@@ skipping 1292 matching lines @@
 }
 
 
 void BytecodeGraphBuilder::VisitDeletePropertySloppy(
     const interpreter::BytecodeArrayIterator& iterator) {
   DCHECK(is_sloppy(language_mode()));
   BuildDelete(iterator);
 }
 
 
+void BytecodeGraphBuilder::VisitDeleteLookupSlot(
+    const interpreter::BytecodeArrayIterator& iterator) {
+  FrameStateBeforeAndAfter states(this, iterator);
+  Node* name = environment()->LookupAccumulator();
+  const Operator* op = javascript()->CallRuntime(Runtime::kDeleteLookupSlot, 2);
+  Node* result = NewNode(op, environment()->Context(), name);
+  environment()->BindAccumulator(result, &states);
+}
+
+
 void BytecodeGraphBuilder::BuildCompareOp(
     const Operator* js_op, const interpreter::BytecodeArrayIterator& iterator) {
   FrameStateBeforeAndAfter states(this, iterator);
   Node* left = environment()->LookupRegister(iterator.GetRegisterOperand(0));
   Node* right = environment()->LookupAccumulator();
   Node* node = NewNode(js_op, left, right);
   environment()->BindAccumulator(node, &states);
 }
 
 
@@ skipping 448 matching lines @@
 
 void BytecodeGraphBuilder::UpdateControlDependencyToLeaveFunction(Node* exit) {
   if (environment()->IsMarkedAsUnreachable()) return;
   environment()->MarkAsUnreachable();
   exit_controls_.push_back(exit);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8