1 //===- CodeGenTarget.h - Target Class Wrapper -------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines wrappers for the Target class and related global 11 // functionality. This makes it easier to access the data and provides a single 12 // place that needs to check it for validity. All of these classes throw 13 // exceptions on error conditions. 14 // 15 //===----------------------------------------------------------------------===// 16 17 #ifndef CODEGEN_TARGET_H 18 #define CODEGEN_TARGET_H 19 20 #include "CodeGenRegisters.h" 21 #include "CodeGenInstruction.h" 22 #include "llvm/TableGen/Record.h" 23 #include "llvm/Support/raw_ostream.h" 24 #include <algorithm> 25 26 namespace llvm { 27 28 struct CodeGenRegister; 29 class CodeGenTarget; 30 31 // SelectionDAG node properties. 32 // SDNPMemOperand: indicates that a node touches memory and therefore must 33 // have an associated memory operand that describes the access. 34 enum SDNP { 35 SDNPCommutative, 36 SDNPAssociative, 37 SDNPHasChain, 38 SDNPOutGlue, 39 SDNPInGlue, 40 SDNPOptInGlue, 41 SDNPMayLoad, 42 SDNPMayStore, 43 SDNPSideEffect, 44 SDNPMemOperand, 45 SDNPVariadic, 46 SDNPWantRoot, 47 SDNPWantParent 48 }; 49 50 /// getValueType - Return the MVT::SimpleValueType that the specified TableGen 51 /// record corresponds to. 52 MVT::SimpleValueType getValueType(Record *Rec); 53 54 std::string getName(MVT::SimpleValueType T); 55 std::string getEnumName(MVT::SimpleValueType T); 56 57 /// getQualifiedName - Return the name of the specified record, with a 58 /// namespace qualifier if the record contains one. 59 std::string getQualifiedName(const Record *R); 60 61 /// CodeGenTarget - This class corresponds to the Target class in the .td files. 62 /// 63 class CodeGenTarget { 64 RecordKeeper &Records; 65 Record *TargetRec; 66 67 mutable DenseMap<const Record*, CodeGenInstruction*> Instructions; 68 mutable CodeGenRegBank *RegBank; 69 mutable std::vector<Record*> RegAltNameIndices; 70 mutable std::vector<MVT::SimpleValueType> LegalValueTypes; 71 void ReadRegAltNameIndices() const; 72 void ReadInstructions() const; 73 void ReadLegalValueTypes() const; 74 75 mutable std::vector<const CodeGenInstruction*> InstrsByEnum; 76 public: 77 CodeGenTarget(RecordKeeper &Records); 78 getTargetRecord()79 Record *getTargetRecord() const { return TargetRec; } 80 const std::string &getName() const; 81 82 /// getInstNamespace - Return the target-specific instruction namespace. 83 /// 84 std::string getInstNamespace() const; 85 86 /// getInstructionSet - Return the InstructionSet object. 87 /// 88 Record *getInstructionSet() const; 89 90 /// getAsmParser - Return the AssemblyParser definition for this target. 91 /// 92 Record *getAsmParser() const; 93 94 /// getAsmParserVariant - Return the AssmblyParserVariant definition for 95 /// this target. 96 /// 97 Record *getAsmParserVariant(unsigned i) const; 98 99 /// getAsmParserVariantCount - Return the AssmblyParserVariant definition 100 /// available for this target. 101 /// 102 unsigned getAsmParserVariantCount() const; 103 104 /// getAsmWriter - Return the AssemblyWriter definition for this target. 105 /// 106 Record *getAsmWriter() const; 107 108 /// getRegBank - Return the register bank description. 109 CodeGenRegBank &getRegBank() const; 110 111 /// getRegisterByName - If there is a register with the specific AsmName, 112 /// return it. 113 const CodeGenRegister *getRegisterByName(StringRef Name) const; 114 getRegAltNameIndices()115 const std::vector<Record*> &getRegAltNameIndices() const { 116 if (RegAltNameIndices.empty()) ReadRegAltNameIndices(); 117 return RegAltNameIndices; 118 } 119 getRegisterClass(Record * R)120 const CodeGenRegisterClass &getRegisterClass(Record *R) const { 121 return *getRegBank().getRegClass(R); 122 } 123 124 /// getRegisterVTs - Find the union of all possible SimpleValueTypes for the 125 /// specified physical register. 126 std::vector<MVT::SimpleValueType> getRegisterVTs(Record *R) const; 127 getLegalValueTypes()128 const std::vector<MVT::SimpleValueType> &getLegalValueTypes() const { 129 if (LegalValueTypes.empty()) ReadLegalValueTypes(); 130 return LegalValueTypes; 131 } 132 133 /// isLegalValueType - Return true if the specified value type is natively 134 /// supported by the target (i.e. there are registers that directly hold it). isLegalValueType(MVT::SimpleValueType VT)135 bool isLegalValueType(MVT::SimpleValueType VT) const { 136 const std::vector<MVT::SimpleValueType> &LegalVTs = getLegalValueTypes(); 137 for (unsigned i = 0, e = LegalVTs.size(); i != e; ++i) 138 if (LegalVTs[i] == VT) return true; 139 return false; 140 } 141 142 private: getInstructions()143 DenseMap<const Record*, CodeGenInstruction*> &getInstructions() const { 144 if (Instructions.empty()) ReadInstructions(); 145 return Instructions; 146 } 147 public: 148 getInstruction(const Record * InstRec)149 CodeGenInstruction &getInstruction(const Record *InstRec) const { 150 if (Instructions.empty()) ReadInstructions(); 151 DenseMap<const Record*, CodeGenInstruction*>::iterator I = 152 Instructions.find(InstRec); 153 assert(I != Instructions.end() && "Not an instruction"); 154 return *I->second; 155 } 156 157 /// getInstructionsByEnumValue - Return all of the instructions defined by the 158 /// target, ordered by their enum value. 159 const std::vector<const CodeGenInstruction*> & getInstructionsByEnumValue()160 getInstructionsByEnumValue() const { 161 if (InstrsByEnum.empty()) ComputeInstrsByEnum(); 162 return InstrsByEnum; 163 } 164 165 typedef std::vector<const CodeGenInstruction*>::const_iterator inst_iterator; inst_begin()166 inst_iterator inst_begin() const{return getInstructionsByEnumValue().begin();} inst_end()167 inst_iterator inst_end() const { return getInstructionsByEnumValue().end(); } 168 169 170 /// isLittleEndianEncoding - are instruction bit patterns defined as [0..n]? 171 /// 172 bool isLittleEndianEncoding() const; 173 174 private: 175 void ComputeInstrsByEnum() const; 176 }; 177 178 /// ComplexPattern - ComplexPattern info, corresponding to the ComplexPattern 179 /// tablegen class in TargetSelectionDAG.td 180 class ComplexPattern { 181 MVT::SimpleValueType Ty; 182 unsigned NumOperands; 183 std::string SelectFunc; 184 std::vector<Record*> RootNodes; 185 unsigned Properties; // Node properties 186 public: ComplexPattern()187 ComplexPattern() : NumOperands(0) {} 188 ComplexPattern(Record *R); 189 getValueType()190 MVT::SimpleValueType getValueType() const { return Ty; } getNumOperands()191 unsigned getNumOperands() const { return NumOperands; } getSelectFunc()192 const std::string &getSelectFunc() const { return SelectFunc; } getRootNodes()193 const std::vector<Record*> &getRootNodes() const { 194 return RootNodes; 195 } hasProperty(enum SDNP Prop)196 bool hasProperty(enum SDNP Prop) const { return Properties & (1 << Prop); } 197 }; 198 199 } // End llvm namespace 200 201 #endif 202