[Interpreter] Add support for for count operations.

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 74 matching lines @@
   // Emit bitwise operator invocations
   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 count operatior invocations
+  builder.CountOperation(Token::Value::ADD, Strength::WEAK)
+      .CountOperation(Token::Value::SUB, Strength::WEAK);
+
   // Emit unary operator invocations.
   builder.LogicalNot().TypeOf();
 
+
   // 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)
       .CompareOperation(Token::Value::GT, reg, Strength::WEAK)
       .CompareOperation(Token::Value::LTE, reg, Strength::WEAK)
       .CompareOperation(Token::Value::GTE, reg, Strength::WEAK)
       .CompareOperation(Token::Value::INSTANCEOF, reg, Strength::WEAK)
       .CompareOperation(Token::Value::IN, reg, Strength::WEAK);
 
   // Emit cast operator invocations.
-  builder.LoadNull()
+  builder.CastAccumulatorToNumber()
       .CastAccumulatorToBoolean()
       .CastAccumulatorToName();
 
   // Emit control flow. Return must be the last instruction.
   BytecodeLabel start;
   builder.Bind(&start);
   // Short jumps with Imm8 operands
   builder.Jump(&start)
       .JumpIfTrue(&start)
       .JumpIfFalse(&start)
@@ skipping 370 matching lines @@
 
   CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
   iterator.Advance();
   CHECK(iterator.done());
 }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8