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

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 "src/interpreter/bytecode-register-allocator.h"
 #include "test/unittests/test-utils.h"
@@ skipping 182 matching lines @@
       .JumpIfTrue(&start)
       .CompareOperation(Token::Value::EQ, reg, Strength::WEAK)
       .JumpIfFalse(&start);
   // Perform an operation that returns a non-boolean operation to
   // generate JumpIfToBooleanTrue/False.
   builder.BinaryOperation(Token::Value::ADD, reg, Strength::WEAK)
       .JumpIfTrue(&start)
       .BinaryOperation(Token::Value::ADD, reg, Strength::WEAK)
       .JumpIfFalse(&start);
 
-  // Emit throw in it's own basic block so that the rest of the code isn't
-  // omitted due to being dead.
+  // Emit throw and re-throw in it's own basic block so that the rest of the
+  // code isn't omitted due to being dead.
   BytecodeLabel after_throw;
   builder.Jump(&after_throw).Throw().Bind(&after_throw);
+  BytecodeLabel after_rethrow;
+  builder.Jump(&after_rethrow).ReThrow().Bind(&after_rethrow);
 
   builder.ForInPrepare(reg)
       .ForInDone(reg, reg)
       .ForInNext(reg, reg, reg)
       .ForInStep(reg);
   builder.ForInPrepare(wide)
       .ForInDone(reg, other)
       .ForInNext(wide, wide, wide)
       .ForInStep(reg);
 
@@ skipping 465 matching lines @@
   }
   CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
   iterator.Advance();
   CHECK(iterator.done());
 }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8