Home | History | Annotate | Download | only in ir 
      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ART_COMPILER_SEA_IR_IR_VISITOR_H_
     18 #define ART_COMPILER_SEA_IR_IR_VISITOR_H_
     19 
     20 namespace sea_ir {
     21 
     22 class SeaGraph;
     23 class Region;
     24 class InstructionNode;
     25 class PhiInstructionNode;
     26 class SignatureNode;
     27 class UnnamedConstInstructionNode;
     28 class ConstInstructionNode;
     29 class ReturnInstructionNode;
     30 class IfNeInstructionNode;
     31 class AddIntLit8InstructionNode;
     32 class MoveResultInstructionNode;
     33 class InvokeStaticInstructionNode;
     34 class AddIntInstructionNode;
     35 class AddIntLitInstructionNode;
     36 class GotoInstructionNode;
     37 class IfEqzInstructionNode;
     38 
     39 
     40 
     41 
     42 class IRVisitor {
     43  public:
     44   explicit IRVisitor(): ordered_regions_() { }
     45   virtual void Initialize(SeaGraph* graph) = 0;
     46   virtual void Visit(SeaGraph* graph) = 0;
     47   virtual void Visit(Region* region) = 0;
     48   virtual void Visit(PhiInstructionNode* region) = 0;
     49   virtual void Visit(SignatureNode* region) = 0;
     50 
     51   virtual void Visit(InstructionNode* region) = 0;
     52   virtual void Visit(ConstInstructionNode* instruction) = 0;
     53   virtual void Visit(UnnamedConstInstructionNode* instruction) = 0;
     54   virtual void Visit(ReturnInstructionNode* instruction) = 0;
     55   virtual void Visit(IfNeInstructionNode* instruction) = 0;
     56   virtual void Visit(MoveResultInstructionNode* instruction) = 0;
     57   virtual void Visit(InvokeStaticInstructionNode* instruction) = 0;
     58   virtual void Visit(AddIntInstructionNode* instruction) = 0;
     59   virtual void Visit(GotoInstructionNode* instruction) = 0;
     60   virtual void Visit(IfEqzInstructionNode* instruction) = 0;
     61 
     62   // Note: This flavor of visitor separates the traversal functions from the actual visiting part
     63   //       so that the Visitor subclasses don't duplicate code and can't get the traversal wrong.
     64   //       The disadvantage is the increased number of functions (and calls).
     65   virtual void Traverse(SeaGraph* graph);
     66   virtual void Traverse(Region* region);
     67   // The following functions are meant to be empty and not pure virtual,
     68   // because the parameter classes have no children to traverse.
     69   virtual void Traverse(InstructionNode* region) { }
     70   virtual void Traverse(ConstInstructionNode* instruction) { }
     71   virtual void Traverse(ReturnInstructionNode* instruction) { }
     72   virtual void Traverse(IfNeInstructionNode* instruction) { }
     73   virtual void Traverse(AddIntLit8InstructionNode* instruction) { }
     74   virtual void Traverse(MoveResultInstructionNode* instruction) { }
     75   virtual void Traverse(InvokeStaticInstructionNode* instruction) { }
     76   virtual void Traverse(AddIntInstructionNode* instruction) { }
     77   virtual void Traverse(GotoInstructionNode* instruction) { }
     78   virtual void Traverse(IfEqzInstructionNode* instruction) { }
     79   virtual void Traverse(PhiInstructionNode* phi) { }
     80   virtual void Traverse(SignatureNode* sig) { }
     81   virtual ~IRVisitor() { }
     82 
     83  protected:
     84   std::vector<Region*> ordered_regions_;
     85 };
     86 }  // namespace sea_ir
     87 #endif  // ART_COMPILER_SEA_IR_IR_VISITOR_H_
     88