[Interpreter] Add support for break statements in labelled blocks.

src/interpreter/control-flow-builders.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/control-flow-builders.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
@@ skipping 63 matching lines @@
 void BreakableControlFlowBuilder::BindLabels(const BytecodeLabel& target,
                                              ZoneVector<BytecodeLabel>* sites) {
   for (size_t i = 0; i < sites->size(); i++) {
     BytecodeLabel& site = sites->at(i);
     builder()->Bind(target, &site);
   }
   sites->clear();
 }
 
 
+void BlockBuilder::EndBlock() {
+  builder()->Bind(&block_end_);
+  SetBreakTarget(block_end_);
+}
+
+
 LoopBuilder::~LoopBuilder() { DCHECK(continue_sites_.empty()); }
 
 
-void LoopBuilder::LoopEnd() {
+void LoopBuilder::EndLoop() {
   // Loop must have closed form, i.e. all loop elements are within the loop,
   // the loop header precedes the body and next elements in the loop.
   DCHECK(loop_header_.is_bound());
   builder()->Bind(&loop_end_);
   SetBreakTarget(loop_end_);
   if (next_.is_bound()) {
     DCHECK(!condition_.is_bound() || next_.offset() >= condition_.offset());
     SetContinueTarget(next_);
   } else {
     DCHECK(condition_.is_bound());
@@ skipping 19 matching lines @@
 
 
 void SwitchBuilder::SetCaseTarget(int index) {
   BytecodeLabel& site = case_sites_.at(index);
   builder()->Bind(&site);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8