1 //===- CodeGenTarget.h - Target Class Wrapper -------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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.
15 //===----------------------------------------------------------------------===//
17 #ifndef CODEGEN_TARGET_H
18 #define CODEGEN_TARGET_H
20 #include "CodeGenRegisters.h"
21 #include "CodeGenInstruction.h"
29 struct CodeGenRegister;
32 // SelectionDAG node properties.
45 // ComplexPattern attributes.
46 enum CPAttr { CPAttrParentAsRoot };
48 /// getValueType - Return the MVT::ValueType that the specified TableGen record
50 MVT::ValueType getValueType(Record *Rec);
52 std::string getName(MVT::ValueType T);
53 std::string getEnumName(MVT::ValueType T);
55 /// getQualifiedName - Return the name of the specified record, with a
56 /// namespace qualifier if the record contains one.
57 std::string getQualifiedName(const Record *R);
59 /// CodeGenTarget - This class corresponds to the Target class in the .td files.
64 mutable std::map<std::string, CodeGenInstruction> Instructions;
65 mutable std::vector<CodeGenRegister> Registers;
66 mutable std::vector<CodeGenRegisterClass> RegisterClasses;
67 mutable std::vector<MVT::ValueType> LegalValueTypes;
68 void ReadRegisters() const;
69 void ReadRegisterClasses() const;
70 void ReadInstructions() const;
71 void ReadLegalValueTypes() const;
75 Record *getTargetRecord() const { return TargetRec; }
76 const std::string &getName() const;
78 /// getInstructionSet - Return the InstructionSet object.
80 Record *getInstructionSet() const;
82 /// getAsmWriter - Return the AssemblyWriter definition for this target.
84 Record *getAsmWriter() const;
86 const std::vector<CodeGenRegister> &getRegisters() const {
87 if (Registers.empty()) ReadRegisters();
91 const std::vector<CodeGenRegisterClass> &getRegisterClasses() const {
92 if (RegisterClasses.empty()) ReadRegisterClasses();
93 return RegisterClasses;
96 const CodeGenRegisterClass &getRegisterClass(Record *R) const {
97 const std::vector<CodeGenRegisterClass> &RC = getRegisterClasses();
98 for (unsigned i = 0, e = RC.size(); i != e; ++i)
99 if (RC[i].TheDef == R)
101 assert(0 && "Didn't find the register class");
105 /// getRegisterClassForRegister - Find the register class that contains the
106 /// specified physical register. If there register exists in multiple
107 /// register classes or is not in a register class, return null.
108 const CodeGenRegisterClass *getRegisterClassForRegister(Record *R) const {
109 const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
110 const CodeGenRegisterClass *FoundRC = 0;
111 for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
112 const CodeGenRegisterClass &RC = RegisterClasses[i];
113 for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
114 if (R == RC.Elements[ei]) {
115 if (FoundRC) return 0; // In multiple RC's
124 /// getRegisterVTs - Find the union of all possible ValueTypes for the
125 /// specified physical register.
126 std::vector<unsigned char> getRegisterVTs(Record *R) const;
128 const std::vector<MVT::ValueType> &getLegalValueTypes() const {
129 if (LegalValueTypes.empty()) ReadLegalValueTypes();
130 return LegalValueTypes;
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).
135 bool isLegalValueType(MVT::ValueType VT) const {
136 const std::vector<MVT::ValueType> &LegalVTs = getLegalValueTypes();
137 for (unsigned i = 0, e = LegalVTs.size(); i != e; ++i)
138 if (LegalVTs[i] == VT) return true;
142 /// getInstructions - Return all of the instructions defined for this target.
144 const std::map<std::string, CodeGenInstruction> &getInstructions() const {
145 if (Instructions.empty()) ReadInstructions();
148 std::map<std::string, CodeGenInstruction> &getInstructions() {
149 if (Instructions.empty()) ReadInstructions();
153 CodeGenInstruction &getInstruction(const std::string &Name) const {
154 const std::map<std::string, CodeGenInstruction> &Insts = getInstructions();
155 assert(Insts.count(Name) && "Not an instruction!");
156 return const_cast<CodeGenInstruction&>(Insts.find(Name)->second);
159 typedef std::map<std::string,
160 CodeGenInstruction>::const_iterator inst_iterator;
161 inst_iterator inst_begin() const { return getInstructions().begin(); }
162 inst_iterator inst_end() const { return Instructions.end(); }
164 /// getInstructionsByEnumValue - Return all of the instructions defined by the
165 /// target, ordered by their enum value.
166 void getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
167 &NumberedInstructions);
170 /// isLittleEndianEncoding - are instruction bit patterns defined as [0..n]?
172 bool isLittleEndianEncoding() const;
175 /// ComplexPattern - ComplexPattern info, corresponding to the ComplexPattern
176 /// tablegen class in TargetSelectionDAG.td
177 class ComplexPattern {
179 unsigned NumOperands;
180 std::string SelectFunc;
181 std::vector<Record*> RootNodes;
182 unsigned Properties; // Node properties
183 unsigned Attributes; // Pattern attributes
185 ComplexPattern() : NumOperands(0) {};
186 ComplexPattern(Record *R);
188 MVT::ValueType getValueType() const { return Ty; }
189 unsigned getNumOperands() const { return NumOperands; }
190 const std::string &getSelectFunc() const { return SelectFunc; }
191 const std::vector<Record*> &getRootNodes() const {
194 bool hasProperty(enum SDNP Prop) const { return Properties & (1 << Prop); }
195 bool hasAttribute(enum CPAttr Attr) const { return Attributes & (1 << Attr); }
198 } // End llvm namespace