[Interpreter] Local flow control in the bytecode graph builder.

src/interpreter/bytecode-array-iterator.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/bytecode-array-iterator.h"
 
 #include "src/objects-inl.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
 BytecodeArrayIterator::BytecodeArrayIterator(
     Handle<BytecodeArray> bytecode_array)
     : bytecode_array_(bytecode_array), bytecode_offset_(0) {}
 
 
 void BytecodeArrayIterator::Advance() {
   bytecode_offset_ += Bytecodes::Size(current_bytecode());
 }
 
 
+void BytecodeArrayIterator::AdvanceToOffset(int offset) {
+  DCHECK_GE(offset, 0);
+  DCHECK_LE(offset, bytecode_array()->length());
+  bytecode_offset_ = offset;
+}
+
+
 bool BytecodeArrayIterator::done() const {
   return bytecode_offset_ >= bytecode_array()->length();
 }
 
 
 Bytecode BytecodeArrayIterator::current_bytecode() const {
   DCHECK(!done());
   uint8_t current_byte = bytecode_array()->get(bytecode_offset_);
   return interpreter::Bytecodes::FromByte(current_byte);
 }
@@ skipping 58 matching lines @@
 
 Handle<Object> BytecodeArrayIterator::GetConstantForIndexOperand(
     int operand_index) const {
   Handle<FixedArray> constants = handle(bytecode_array()->constant_pool());
   return FixedArray::get(constants, GetIndexOperand(operand_index));
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8