[Interpreter] Adds delete operator to interpreter.

test/unittests/interpreter/bytecode-array-builder-unittest.cc

 // Copyright 2014 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/v8.h"
 
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/bytecode-array-iterator.h"
 #include "test/unittests/test-utils.h"
 
@@ skipping 76 matching lines @@
   builder.BinaryOperation(Token::Value::BIT_OR, reg, Strength::WEAK)
       .BinaryOperation(Token::Value::BIT_XOR, reg, Strength::WEAK)
       .BinaryOperation(Token::Value::BIT_AND, reg, Strength::WEAK);
 
   // Emit shift operator invocations
   builder.BinaryOperation(Token::Value::SHL, reg, Strength::WEAK)
       .BinaryOperation(Token::Value::SAR, reg, Strength::WEAK)
       .BinaryOperation(Token::Value::SHR, reg, Strength::WEAK);
 
   // Emit unary operator invocations.
-  builder.LogicalNot().TypeOf();
+  builder.LogicalNot()
+      .TypeOf()
+      .Delete(reg, LanguageMode::SLOPPY)

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

nit - make this a different section (since the bytecodes aren't really unary
operators even athough the delete operator is.

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

Done.

+      .Delete(reg, LanguageMode::STRICT);
 
   // Emit new.
   builder.New(reg, reg, 0);
 
   // Emit test operator invocations.
   builder.CompareOperation(Token::Value::EQ, reg, Strength::WEAK)
       .CompareOperation(Token::Value::NE, reg, Strength::WEAK)
       .CompareOperation(Token::Value::EQ_STRICT, reg, Strength::WEAK)
       .CompareOperation(Token::Value::NE_STRICT, reg, Strength::WEAK)
       .CompareOperation(Token::Value::LT, reg, Strength::WEAK)
@@ skipping 388 matching lines @@
 
   CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
   iterator.Advance();
   CHECK(iterator.done());
 }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8