[Interpreter] Adds delete operator to interpreter.

src/interpreter/interpreter.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/interpreter/interpreter.h"
 
 #include "src/code-factory.h"
 #include "src/compiler.h"
 #include "src/compiler/interpreter-assembler.h"
 #include "src/factory.h"
@@ skipping 514 matching lines @@
 // Load the accumulator with the string representating type of the
 // object in the accumulator.
 void Interpreter::DoTypeOf(compiler::InterpreterAssembler* assembler) {
   Node* accumulator = __ GetAccumulator();
   Node* result = __ CallRuntime(Runtime::kInterpreterTypeOf, accumulator);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 
+// DeletePropertyStrict
+//
+// Delete the property specified in the accumulator from the object
+// referenced by the register operand following strict mode semantics.
+void Interpreter::DoDeletePropertyStrict(
+    compiler::InterpreterAssembler* assembler) {
+  DoBinaryOp(Runtime::kDeleteProperty_Strict, assembler);

[rmcilroy, 2015/10/21 14:52:54]

Hmm, this isn't really a binary op, and when binary ops do more smarts than just
calling the runtime then this will be wrong. Could you just add a DoDelete(...)
which does the same thing and call it from both of these please.

[mythria, 2015/10/23 14:48:01]

Done.

+}
+
+
+// DeletePropertySloppy
+//
+// Delete the property specified in the accumulator from the object
+// referenced by the register operand following sloppy mode semantics.
+void Interpreter::DoDeletePropertySloppy(
+    compiler::InterpreterAssembler* assembler) {
+  DoBinaryOp(Runtime::kDeleteProperty_Sloppy, assembler);
+}
+
+
 // Call <callable> <receiver> <arg_count>
 //
 // Call a JSfunction or Callable in |callable| with the |receiver| and
 // |arg_count| arguments in subsequent registers.
 void Interpreter::DoCall(compiler::InterpreterAssembler* assembler) {
   Node* function_reg = __ BytecodeOperandReg8(0);
   Node* function = __ LoadRegister(function_reg);
   Node* receiver_reg = __ BytecodeOperandReg8(1);
   Node* first_arg = __ RegisterLocation(receiver_reg);
   Node* args_count = __ BytecodeOperandCount8(2);
@@ skipping 367 matching lines @@
 //
 // Return the value in the accumulator.
 void Interpreter::DoReturn(compiler::InterpreterAssembler* assembler) {
   __ Return();
 }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8