// 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/compiler/bytecode-branch-analysis.h" #include "src/interpreter/bytecode-array-iterator.h" #include "src/objects-inl.h" namespace v8 { namespace internal { namespace compiler { BytecodeBranchAnalysis::BytecodeBranchAnalysis( Handle<BytecodeArray> bytecode_array, Zone* zone) : bytecode_array_(bytecode_array), is_backward_target_(bytecode_array->length(), zone), is_forward_target_(bytecode_array->length(), zone), zone_(zone) {} void BytecodeBranchAnalysis::Analyze() { interpreter::BytecodeArrayIterator iterator(bytecode_array()); while (!iterator.done()) { interpreter::Bytecode bytecode = iterator.current_bytecode(); int current_offset = iterator.current_offset(); if (interpreter::Bytecodes::IsJump(bytecode)) { AddBranch(current_offset, iterator.GetJumpTargetOffset()); } iterator.Advance(); } } void BytecodeBranchAnalysis::AddBranch(int source_offset, int target_offset) { if (source_offset < target_offset) { is_forward_target_.Add(target_offset); } else { is_backward_target_.Add(target_offset); } } } // namespace compiler } // namespace internal } // namespace v8