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 abort
13 // on error conditions.
15 //===----------------------------------------------------------------------===//
17 #ifndef LLVM_UTILS_TABLEGEN_CODEGENTARGET_H
18 #define LLVM_UTILS_TABLEGEN_CODEGENTARGET_H
20 #include "CodeGenInstruction.h"
21 #include "CodeGenRegisters.h"
22 #include "llvm/Support/raw_ostream.h"
23 #include "llvm/TableGen/Record.h"
28 struct CodeGenRegister;
29 class CodeGenSchedModels;
32 // SelectionDAG node properties.
33 // SDNPMemOperand: indicates that a node touches memory and therefore must
34 // have an associated memory operand that describes the access.
51 /// getValueType - Return the MVT::SimpleValueType that the specified TableGen
52 /// record corresponds to.
53 MVT::SimpleValueType getValueType(Record *Rec);
55 std::string getName(MVT::SimpleValueType T);
56 std::string getEnumName(MVT::SimpleValueType T);
58 /// getQualifiedName - Return the name of the specified record, with a
59 /// namespace qualifier if the record contains one.
60 std::string getQualifiedName(const Record *R);
62 /// CodeGenTarget - This class corresponds to the Target class in the .td files.
65 RecordKeeper &Records;
68 mutable DenseMap<const Record*,
69 std::unique_ptr<CodeGenInstruction>> Instructions;
70 mutable std::unique_ptr<CodeGenRegBank> RegBank;
71 mutable std::vector<Record*> RegAltNameIndices;
72 mutable SmallVector<MVT::SimpleValueType, 8> LegalValueTypes;
73 void ReadRegAltNameIndices() const;
74 void ReadInstructions() const;
75 void ReadLegalValueTypes() const;
77 mutable std::unique_ptr<CodeGenSchedModels> SchedModels;
79 mutable std::vector<const CodeGenInstruction*> InstrsByEnum;
81 CodeGenTarget(RecordKeeper &Records);
84 Record *getTargetRecord() const { return TargetRec; }
85 const std::string &getName() const;
87 /// getInstNamespace - Return the target-specific instruction namespace.
89 std::string getInstNamespace() const;
91 /// getInstructionSet - Return the InstructionSet object.
93 Record *getInstructionSet() const;
95 /// getAsmParser - Return the AssemblyParser definition for this target.
97 Record *getAsmParser() const;
99 /// getAsmParserVariant - Return the AssmblyParserVariant definition for
102 Record *getAsmParserVariant(unsigned i) const;
104 /// getAsmParserVariantCount - Return the AssmblyParserVariant definition
105 /// available for this target.
107 unsigned getAsmParserVariantCount() const;
109 /// getAsmWriter - Return the AssemblyWriter definition for this target.
111 Record *getAsmWriter() const;
113 /// getRegBank - Return the register bank description.
114 CodeGenRegBank &getRegBank() const;
116 /// getRegisterByName - If there is a register with the specific AsmName,
118 const CodeGenRegister *getRegisterByName(StringRef Name) const;
120 const std::vector<Record*> &getRegAltNameIndices() const {
121 if (RegAltNameIndices.empty()) ReadRegAltNameIndices();
122 return RegAltNameIndices;
125 const CodeGenRegisterClass &getRegisterClass(Record *R) const {
126 return *getRegBank().getRegClass(R);
129 /// getRegisterVTs - Find the union of all possible SimpleValueTypes for the
130 /// specified physical register.
131 std::vector<MVT::SimpleValueType> getRegisterVTs(Record *R) const;
133 ArrayRef<MVT::SimpleValueType> getLegalValueTypes() const {
134 if (LegalValueTypes.empty()) ReadLegalValueTypes();
135 return LegalValueTypes;
138 /// isLegalValueType - Return true if the specified value type is natively
139 /// supported by the target (i.e. there are registers that directly hold it).
140 bool isLegalValueType(MVT::SimpleValueType VT) const {
141 ArrayRef<MVT::SimpleValueType> LegalVTs = getLegalValueTypes();
142 for (unsigned i = 0, e = LegalVTs.size(); i != e; ++i)
143 if (LegalVTs[i] == VT) return true;
147 CodeGenSchedModels &getSchedModels() const;
150 DenseMap<const Record*, std::unique_ptr<CodeGenInstruction>> &
151 getInstructions() const {
152 if (Instructions.empty()) ReadInstructions();
157 CodeGenInstruction &getInstruction(const Record *InstRec) const {
158 if (Instructions.empty()) ReadInstructions();
159 auto I = Instructions.find(InstRec);
160 assert(I != Instructions.end() && "Not an instruction");
164 /// getInstructionsByEnumValue - Return all of the instructions defined by the
165 /// target, ordered by their enum value.
166 const std::vector<const CodeGenInstruction*> &
167 getInstructionsByEnumValue() const {
168 if (InstrsByEnum.empty()) ComputeInstrsByEnum();
172 typedef std::vector<const CodeGenInstruction*>::const_iterator inst_iterator;
173 inst_iterator inst_begin() const{return getInstructionsByEnumValue().begin();}
174 inst_iterator inst_end() const { return getInstructionsByEnumValue().end(); }
175 iterator_range<inst_iterator> instructions() const {
176 return iterator_range<inst_iterator>(inst_begin(), inst_end());
180 /// isLittleEndianEncoding - are instruction bit patterns defined as [0..n]?
182 bool isLittleEndianEncoding() const;
184 /// reverseBitsForLittleEndianEncoding - For little-endian instruction bit
185 /// encodings, reverse the bit order of all instructions.
186 void reverseBitsForLittleEndianEncoding();
188 /// guessInstructionProperties - should we just guess unset instruction
190 bool guessInstructionProperties() const;
193 void ComputeInstrsByEnum() const;
196 /// ComplexPattern - ComplexPattern info, corresponding to the ComplexPattern
197 /// tablegen class in TargetSelectionDAG.td
198 class ComplexPattern {
199 MVT::SimpleValueType Ty;
200 unsigned NumOperands;
201 std::string SelectFunc;
202 std::vector<Record*> RootNodes;
203 unsigned Properties; // Node properties
205 ComplexPattern() : NumOperands(0) {}
206 ComplexPattern(Record *R);
208 MVT::SimpleValueType getValueType() const { return Ty; }
209 unsigned getNumOperands() const { return NumOperands; }
210 const std::string &getSelectFunc() const { return SelectFunc; }
211 const std::vector<Record*> &getRootNodes() const {
214 bool hasProperty(enum SDNP Prop) const { return Properties & (1 << Prop); }
217 } // End llvm namespace