[Interpreter] Add support for Throw.

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 137 matching lines @@
   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_; }
@@ skipping 39 matching lines @@
   // Scope helpers used by TemporaryRegisterScope
   int BorrowTemporaryRegister();
   void ReturnTemporaryRegister(int reg_index);
 
   Isolate* isolate_;
   Zone* zone_;
   ZoneVector<uint8_t> bytecodes_;
   bool bytecode_generated_;
   size_t last_block_end_;
   size_t last_bytecode_start_;
-  bool return_seen_in_block_;
+  bool exit_seen_in_block_;
 
   IdentityMap<size_t> constants_map_;
   ZoneVector<Handle<Object>> constants_;
 
   int parameter_count_;
   int local_register_count_;
   int context_register_count_;
   int temporary_register_count_;
   int temporary_register_next_;
 
@@ skipping 58 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(TemporaryRegisterScope);
 };
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_