[interpreter] Add ReThrow bytecode for try-finally support.

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 1733 matching lines @@
 //
 // Throws the exception in the accumulator.
 void Interpreter::DoThrow(compiler::InterpreterAssembler* assembler) {
   Node* exception = __ GetAccumulator();
   __ CallRuntime(Runtime::kThrow, exception);
   // We shouldn't ever return from a throw.
   __ Abort(kUnexpectedReturnFromThrow);
 }
 
 
+// ReThrow
+//
+// Re-throws the exception in the accumulator.
+void Interpreter::DoReThrow(compiler::InterpreterAssembler* assembler) {
+  Node* exception = __ GetAccumulator();
+  __ CallRuntime(Runtime::kReThrow, exception);
+  // We shouldn't ever return from a throw.
+  __ Abort(kUnexpectedReturnFromThrow);
+}
+
+
 // Return
 //
 // Return the value in the accumulator.
 void Interpreter::DoReturn(compiler::InterpreterAssembler* assembler) {
   __ Return();
 }
 
 
 // ForInPrepare <cache_info_triple>
 //
@@ skipping 80 matching lines @@
   Node* index_reg = __ BytecodeOperandReg(0);
   Node* index = __ LoadRegister(index_reg);
   Node* result = __ CallRuntime(Runtime::kForInStep, index);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8