| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /** |
| * @author Intel, Mikhail Y. Fursov |
| */ |
| |
| #ifndef _IA32_CODE_LAYOUT_BOTTOM_UP |
| #define _IA32_CODE_LAYOUT_BOTTOM_UP |
| |
| #include "Ia32CodeLayout.h" |
| namespace Jitrino |
| { |
| namespace Ia32 { |
| |
| /** |
| * Class to perform bottom-up block layout. |
| * The layout algorithm is similar to the one described in the paper |
| * "Profile Guided Code Positioning" by Hansen & Pettis. |
| */ |
| class BottomUpLayout : public Linearizer { |
| friend class Linearizer; |
| protected: |
| BottomUpLayout(IRManager* irManager); |
| virtual ~BottomUpLayout() {} |
| |
| void linearizeCfgImpl(); |
| private: |
| |
| class Chain { |
| public: |
| BasicBlock* first; |
| BasicBlock* last; |
| Chain (BasicBlock* f, BasicBlock* l) : first(f), last(l){} |
| |
| }; |
| |
| |
| typedef StlSet<BasicBlock*> BlocksSet; |
| |
| |
| void layoutEdge(Edge *e); |
| void putDispatchSuccessorsInChain(); |
| void combineChains(); |
| |
| |
| |
| /* for use in doing bottom up layout */ |
| MemoryManager mm; |
| |
| StlVector<bool> firstInChain; |
| StlVector<bool> lastInChain; |
| StlVector<BasicBlock*> prevInLayoutBySuccessorId; |
| |
| |
| }; |
| |
| |
| }} //namespace |
| |
| #endif |
| |