[Interpreter] Add support for for count operations.

src/interpreter/bytecode-array-builder.h

 // 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.
 
 #ifndef V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 #define V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 
 #include <vector>
 
 #include "src/ast.h"
@@ skipping 128 matching lines @@
   // Call the runtime function with |function_id|. The first argument should be
   // in |first_arg| and all subsequent arguments should be in registers
   // <first_arg + 1> to <first_arg + 1 + arg_count>.
   BytecodeArrayBuilder& CallRuntime(Runtime::FunctionId function_id,
                                     Register first_arg, size_t arg_count);
 
   // Operators (register holds the lhs value, accumulator holds the rhs value).
   BytecodeArrayBuilder& BinaryOperation(Token::Value binop, Register reg,
                                         Strength strength);
 
+  // Count Operators (value stored in accumulator).
+  BytecodeArrayBuilder& CountOperation(Token::Value op, Strength strength);
+
   // Unary Operators.
   BytecodeArrayBuilder& LogicalNot();
   BytecodeArrayBuilder& TypeOf();
 
   // Tests.
   BytecodeArrayBuilder& CompareOperation(Token::Value op, Register reg,
                                          Strength strength);
 
   // Casts.
   BytecodeArrayBuilder& CastAccumulatorToBoolean();
   BytecodeArrayBuilder& CastAccumulatorToName();
+  BytecodeArrayBuilder& CastAccumulatorToNumber();
 
   // Flow Control.
   BytecodeArrayBuilder& Bind(BytecodeLabel* label);
   BytecodeArrayBuilder& Bind(const BytecodeLabel& target, BytecodeLabel* label);
 
   BytecodeArrayBuilder& Jump(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfTrue(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfFalse(BytecodeLabel* label);
   // TODO(mythria) The following two functions should be merged into
   // JumpIfTrue/False. These bytecodes should be automatically chosen rather
   // than explicitly using them.
   BytecodeArrayBuilder& JumpIfToBooleanTrue(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfToBooleanFalse(BytecodeLabel* label);
 
   BytecodeArrayBuilder& Throw();
   BytecodeArrayBuilder& Return();
 
   BytecodeArrayBuilder& EnterBlock();
   BytecodeArrayBuilder& LeaveBlock();
 
   // Accessors
   Zone* zone() const { return zone_; }
 
  private:
   ZoneVector<uint8_t>* bytecodes() { return &bytecodes_; }
   const ZoneVector<uint8_t>* bytecodes() const { return &bytecodes_; }
   Isolate* isolate() const { return isolate_; }
 
   static Bytecode BytecodeForBinaryOperation(Token::Value op);
+  static Bytecode BytecodeForCountOperation(Token::Value op);
   static Bytecode BytecodeForCompareOperation(Token::Value op);
   static Bytecode BytecodeForLoadIC(LanguageMode language_mode);
   static Bytecode BytecodeForKeyedLoadIC(LanguageMode language_mode);
   static Bytecode BytecodeForStoreIC(LanguageMode language_mode);
   static Bytecode BytecodeForKeyedStoreIC(LanguageMode language_mode);
   static Bytecode BytecodeForLoadGlobal(LanguageMode language_mode);
   static Bytecode BytecodeForStoreGlobal(LanguageMode language_mode);
 
   static bool FitsInIdx8Operand(int value);
   static bool FitsInIdx8Operand(size_t value);
@@ skipping 116 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(TemporaryRegisterScope);
 };
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_