| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed 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. |
| */ |
| |
| #ifndef ART_COMPILER_SEA_IR_INSTRUCTION_NODES_H_ |
| #define ART_COMPILER_SEA_IR_INSTRUCTION_NODES_H_ |
| #include "sea_node.h" |
| #include "visitor.h" |
| #include "dex_instruction-inl.h" |
| |
| namespace sea_ir { |
| |
| enum SpecialRegisters { |
| NO_REGISTER = -1, // Usually signifies that there is no register |
| // that respects the condition you asked for. |
| RETURN_REGISTER = -2, // Written by the invoke* instructions, read by move-results. |
| UNNAMED_CONST_REGISTER = -3 // Written by UnnamedConst* instructions, read by *Lit* instruction. |
| }; |
| |
| class IRVisitor; |
| |
| // This class represents an instruction in SEA IR. |
| // As we add support for specific classes of instructions, |
| // the number of InstructionNode objects should dwindle, while the |
| // number of subclasses and instances of subclasses will go up. |
| class InstructionNode: public SeaNode { |
| public: |
| static std::vector<sea_ir::InstructionNode*> Create(const art::Instruction* in); |
| // Returns the Dalvik instruction around which this InstructionNode is wrapped. |
| const art::Instruction* GetInstruction() const { |
| DCHECK(NULL != instruction_) << "Tried to access NULL instruction in an InstructionNode."; |
| return instruction_; |
| } |
| // Returns the register that is defined by the current instruction, or NO_REGISTER otherwise. |
| virtual int GetResultRegister() const; |
| // Returns the set of registers defined by the current instruction. |
| virtual std::vector<int> GetDefinitions() const; |
| // Returns the set of register numbers that are used by the instruction. |
| virtual std::vector<int> GetUses(); |
| // Appends to @result the .dot string representation of the instruction. |
| virtual void ToDot(std::string& result, const art::DexFile& dex_file) const; |
| // Mark the current instruction as a downward exposed definition. |
| void MarkAsDEDef(); |
| // Rename the use of @reg_no to refer to the instruction @definition, |
| // essentially creating SSA form. |
| void RenameToSSA(int reg_no, InstructionNode* definition) { |
| definition_edges_.insert(std::pair<int, InstructionNode*>(reg_no, definition)); |
| definition->AddSSAUse(this); |
| } |
| // Returns the ordered set of Instructions that define the input operands of this instruction. |
| // Precondition: SeaGraph.ConvertToSSA(). |
| std::vector<InstructionNode*> GetSSAUses() { |
| std::vector<int> uses = GetUses(); |
| std::vector<InstructionNode*> ssa_uses; |
| for (std::vector<int>::const_iterator cit = uses.begin(); cit != uses.end(); cit++) { |
| ssa_uses.push_back((*definition_edges_.find(*cit)).second); |
| } |
| return ssa_uses; |
| } |
| |
| virtual void AddSSAUse(InstructionNode* use) { |
| used_in_.push_back(use); |
| } |
| |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| // Set the region to which this instruction belongs. |
| Region* GetRegion() { |
| DCHECK(NULL != region_); |
| return region_; |
| } |
| // Get the region to which this instruction belongs. |
| void SetRegion(Region* region) { |
| region_ = region; |
| } |
| |
| protected: |
| explicit InstructionNode(const art::Instruction* in): |
| SeaNode(), instruction_(in), used_in_(), de_def_(false), region_(NULL) { } |
| void ToDotSSAEdges(std::string& result) const; |
| |
| protected: |
| const art::Instruction* const instruction_; |
| std::map<int, InstructionNode* > definition_edges_; |
| // Stores pointers to instructions that use the result of the current instruction. |
| std::vector<InstructionNode*> used_in_; |
| bool de_def_; |
| Region* region_; |
| }; |
| |
| class ConstInstructionNode: public InstructionNode { |
| public: |
| explicit ConstInstructionNode(const art::Instruction* inst): |
| InstructionNode(inst) { } |
| |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| |
| virtual int32_t GetConstValue() const { |
| return GetInstruction()->VRegB_11n(); |
| } |
| }; |
| |
| class UnnamedConstInstructionNode: public ConstInstructionNode { |
| public: |
| explicit UnnamedConstInstructionNode(const art::Instruction* inst, int32_t value): |
| ConstInstructionNode(inst), value_(value) { } |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| |
| int GetResultRegister() const { |
| return UNNAMED_CONST_REGISTER; |
| } |
| |
| int32_t GetConstValue() const { |
| return value_; |
| } |
| |
| void ToDot(std::string& result, const art::DexFile& dex_file) const { |
| std::ostringstream sstream; |
| sstream << GetConstValue(); |
| const std::string value_as_string(sstream.str()); |
| result += "// Instruction ("+StringId()+"): \n" + StringId() + |
| " [label=\"const/x v-3, #"+ value_as_string + "\""; |
| if (de_def_) { |
| result += "style=bold"; |
| } |
| result += "];\n"; |
| ToDotSSAEdges(result); |
| } |
| |
| private: |
| const int32_t value_; |
| }; |
| |
| class ReturnInstructionNode: public InstructionNode { |
| public: |
| explicit ReturnInstructionNode(const art::Instruction* inst): InstructionNode(inst) { } |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| }; |
| |
| class IfNeInstructionNode: public InstructionNode { |
| public: |
| explicit IfNeInstructionNode(const art::Instruction* inst): InstructionNode(inst) { |
| DCHECK(InstructionTools::IsDefinition(inst) == false); |
| } |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| }; |
| |
| |
| |
| class MoveResultInstructionNode: public InstructionNode { |
| public: |
| explicit MoveResultInstructionNode(const art::Instruction* inst): InstructionNode(inst) { } |
| std::vector<int> GetUses() { |
| std::vector<int> uses; // Using vector<> instead of set<> because order matters. |
| uses.push_back(RETURN_REGISTER); |
| return uses; |
| } |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| }; |
| |
| class InvokeStaticInstructionNode: public InstructionNode { |
| public: |
| explicit InvokeStaticInstructionNode(const art::Instruction* inst): InstructionNode(inst) { } |
| int GetResultRegister() const { |
| return RETURN_REGISTER; |
| } |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| }; |
| |
| class AddIntInstructionNode: public InstructionNode { |
| public: |
| explicit AddIntInstructionNode(const art::Instruction* inst): InstructionNode(inst) { } |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| }; |
| |
| class AddIntLitInstructionNode: public AddIntInstructionNode { |
| public: |
| explicit AddIntLitInstructionNode(const art::Instruction* inst): |
| AddIntInstructionNode(inst) { } |
| |
| std::vector<int> GetUses() { |
| std::vector<int> uses = AddIntInstructionNode::GetUses(); |
| uses.push_back(UNNAMED_CONST_REGISTER); |
| return uses; |
| } |
| |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| }; |
| |
| class GotoInstructionNode: public InstructionNode { |
| public: |
| explicit GotoInstructionNode(const art::Instruction* inst): InstructionNode(inst) { } |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| }; |
| |
| class IfEqzInstructionNode: public InstructionNode { |
| public: |
| explicit IfEqzInstructionNode(const art::Instruction* inst): InstructionNode(inst) { |
| DCHECK(InstructionTools::IsDefinition(inst) == false); |
| } |
| void Accept(IRVisitor* v) { |
| v->Visit(this); |
| v->Traverse(this); |
| } |
| }; |
| } // namespace sea_ir |
| #endif // ART_COMPILER_SEA_IR_INSTRUCTION_NODES_H_ |