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 /// getRegisterByName - If there is a register with the specific AsmName,
101 const CodeGenRegister *getRegisterByName(StringRef Name) const;
103 const std::vector<CodeGenRegisterClass> &getRegisterClasses() const {
104 return getRegBank().getRegClasses();
107 const CodeGenRegisterClass &getRegisterClass(Record *R) const {
108 return *getRegBank().getRegClass(R);
111 /// getRegisterVTs - Find the union of all possible SimpleValueTypes for the
112 /// specified physical register.
113 std::vector<MVT::SimpleValueType> getRegisterVTs(Record *R) const;
115 const std::vector<MVT::SimpleValueType> &getLegalValueTypes() const {
116 if (LegalValueTypes.empty()) ReadLegalValueTypes();
117 return LegalValueTypes;
120 /// isLegalValueType - Return true if the specified value type is natively
121 /// supported by the target (i.e. there are registers that directly hold it).
122 bool isLegalValueType(MVT::SimpleValueType VT) const {
123 const std::vector<MVT::SimpleValueType> &LegalVTs = getLegalValueTypes();
124 for (unsigned i = 0, e = LegalVTs.size(); i != e; ++i)
125 if (LegalVTs[i] == VT) return true;
130 DenseMap<const Record*, CodeGenInstruction*> &getInstructions() const {
131 if (Instructions.empty()) ReadInstructions();
136 CodeGenInstruction &getInstruction(const Record *InstRec) const {
137 if (Instructions.empty()) ReadInstructions();
138 DenseMap<const Record*, CodeGenInstruction*>::iterator I =
139 Instructions.find(InstRec);
140 assert(I != Instructions.end() && "Not an instruction");
144 /// getInstructionsByEnumValue - Return all of the instructions defined by the
145 /// target, ordered by their enum value.
146 const std::vector<const CodeGenInstruction*> &
147 getInstructionsByEnumValue() const {
148 if (InstrsByEnum.empty()) ComputeInstrsByEnum();
152 typedef std::vector<const CodeGenInstruction*>::const_iterator inst_iterator;
153 inst_iterator inst_begin() const{return getInstructionsByEnumValue().begin();}
154 inst_iterator inst_end() const { return getInstructionsByEnumValue().end(); }
157 /// isLittleEndianEncoding - are instruction bit patterns defined as [0..n]?
159 bool isLittleEndianEncoding() const;
162 void ComputeInstrsByEnum() const;
165 /// ComplexPattern - ComplexPattern info, corresponding to the ComplexPattern
166 /// tablegen class in TargetSelectionDAG.td
167 class ComplexPattern {
168 MVT::SimpleValueType Ty;
169 unsigned NumOperands;
170 std::string SelectFunc;
171 std::vector<Record*> RootNodes;
172 unsigned Properties; // Node properties
174 ComplexPattern() : NumOperands(0) {}
175 ComplexPattern(Record *R);
177 MVT::SimpleValueType getValueType() const { return Ty; }
178 unsigned getNumOperands() const { return NumOperands; }
179 const std::string &getSelectFunc() const { return SelectFunc; }
180 const std::vector<Record*> &getRootNodes() const {
183 bool hasProperty(enum SDNP Prop) const { return Properties & (1 << Prop); }
186 } // End llvm namespace