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"
23 #include "llvm/Support/raw_ostream.h"
28 struct CodeGenRegister;
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.
50 /// getValueType - Return the MVT::SimpleValueType that the specified TableGen
51 /// record corresponds to.
52 MVT::SimpleValueType getValueType(Record *Rec);
54 std::string getName(MVT::SimpleValueType T);
55 std::string getEnumName(MVT::SimpleValueType T);
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);
61 /// CodeGenTarget - This class corresponds to the Target class in the .td files.
64 RecordKeeper &Records;
67 mutable DenseMap<const Record*, CodeGenInstruction*> Instructions;
68 mutable CodeGenRegBank *RegBank;
69 mutable std::vector<MVT::SimpleValueType> LegalValueTypes;
70 void ReadInstructions() const;
71 void ReadLegalValueTypes() const;
73 mutable std::vector<const CodeGenInstruction*> InstrsByEnum;
75 CodeGenTarget(RecordKeeper &Records);
77 Record *getTargetRecord() const { return TargetRec; }
78 const std::string &getName() const;
80 /// getInstNamespace - Return the target-specific instruction namespace.
82 std::string getInstNamespace() const;
84 /// getInstructionSet - Return the InstructionSet object.
86 Record *getInstructionSet() const;
88 /// getAsmParser - Return the AssemblyParser definition for this target.
90 Record *getAsmParser() const;
92 /// getAsmWriter - Return the AssemblyWriter definition for this target.
94 Record *getAsmWriter() const;
96 /// getRegBank - Return the register bank description.
97 CodeGenRegBank &getRegBank() const;
99 const std::vector<CodeGenRegister> &getRegisters() const {
100 return getRegBank().getRegisters();
103 /// getRegisterByName - If there is a register with the specific AsmName,
105 const CodeGenRegister *getRegisterByName(StringRef Name) const;
107 const std::vector<CodeGenRegisterClass> &getRegisterClasses() const {
108 return getRegBank().getRegClasses();
111 const CodeGenRegisterClass &getRegisterClass(Record *R) const {
112 return *getRegBank().getRegClass(R);
115 /// getRegisterVTs - Find the union of all possible SimpleValueTypes for the
116 /// specified physical register.
117 std::vector<MVT::SimpleValueType> getRegisterVTs(Record *R) const;
119 const std::vector<MVT::SimpleValueType> &getLegalValueTypes() const {
120 if (LegalValueTypes.empty()) ReadLegalValueTypes();
121 return LegalValueTypes;
124 /// isLegalValueType - Return true if the specified value type is natively
125 /// supported by the target (i.e. there are registers that directly hold it).
126 bool isLegalValueType(MVT::SimpleValueType VT) const {
127 const std::vector<MVT::SimpleValueType> &LegalVTs = getLegalValueTypes();
128 for (unsigned i = 0, e = LegalVTs.size(); i != e; ++i)
129 if (LegalVTs[i] == VT) return true;
134 DenseMap<const Record*, CodeGenInstruction*> &getInstructions() const {
135 if (Instructions.empty()) ReadInstructions();
140 CodeGenInstruction &getInstruction(const Record *InstRec) const {
141 if (Instructions.empty()) ReadInstructions();
142 DenseMap<const Record*, CodeGenInstruction*>::iterator I =
143 Instructions.find(InstRec);
144 assert(I != Instructions.end() && "Not an instruction");
148 /// getInstructionsByEnumValue - Return all of the instructions defined by the
149 /// target, ordered by their enum value.
150 const std::vector<const CodeGenInstruction*> &
151 getInstructionsByEnumValue() const {
152 if (InstrsByEnum.empty()) ComputeInstrsByEnum();
156 typedef std::vector<const CodeGenInstruction*>::const_iterator inst_iterator;
157 inst_iterator inst_begin() const{return getInstructionsByEnumValue().begin();}
158 inst_iterator inst_end() const { return getInstructionsByEnumValue().end(); }
161 /// isLittleEndianEncoding - are instruction bit patterns defined as [0..n]?
163 bool isLittleEndianEncoding() const;
166 void ComputeInstrsByEnum() const;
169 /// ComplexPattern - ComplexPattern info, corresponding to the ComplexPattern
170 /// tablegen class in TargetSelectionDAG.td
171 class ComplexPattern {
172 MVT::SimpleValueType Ty;
173 unsigned NumOperands;
174 std::string SelectFunc;
175 std::vector<Record*> RootNodes;
176 unsigned Properties; // Node properties
178 ComplexPattern() : NumOperands(0) {}
179 ComplexPattern(Record *R);
181 MVT::SimpleValueType getValueType() const { return Ty; }
182 unsigned getNumOperands() const { return NumOperands; }
183 const std::string &getSelectFunc() const { return SelectFunc; }
184 const std::vector<Record*> &getRootNodes() const {
187 bool hasProperty(enum SDNP Prop) const { return Properties & (1 << Prop); }
190 } // End llvm namespace