1 //===- CodeGenTarget.h - Target Class Wrapper -------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source 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;
31 /// getValueType - Return the MVT::ValueType that the specified TableGen record
33 MVT::ValueType getValueType(Record *Rec);
35 std::ostream &operator<<(std::ostream &OS, MVT::ValueType T);
36 std::string getName(MVT::ValueType T);
37 std::string getEnumName(MVT::ValueType T);
40 /// CodeGenTarget - This class corresponds to the Target class in the .td files.
44 std::vector<Record*> CalleeSavedRegisters;
45 MVT::ValueType PointerType;
47 mutable std::map<std::string, CodeGenInstruction> Instructions;
48 mutable std::vector<CodeGenRegister> Registers;
49 mutable std::vector<CodeGenRegisterClass> RegisterClasses;
50 mutable std::vector<MVT::ValueType> LegalValueTypes;
51 void ReadRegisters() const;
52 void ReadRegisterClasses() const;
53 void ReadInstructions() const;
54 void ReadLegalValueTypes() const;
58 Record *getTargetRecord() const { return TargetRec; }
59 const std::string &getName() const;
61 const std::vector<Record*> &getCalleeSavedRegisters() const {
62 return CalleeSavedRegisters;
65 MVT::ValueType getPointerType() const { return PointerType; }
67 /// getInstructionSet - Return the InstructionSet object.
69 Record *getInstructionSet() const;
71 /// getAsmWriter - Return the AssemblyWriter definition for this target.
73 Record *getAsmWriter() const;
75 const std::vector<CodeGenRegister> &getRegisters() const {
76 if (Registers.empty()) ReadRegisters();
80 const std::vector<CodeGenRegisterClass> &getRegisterClasses() const {
81 if (RegisterClasses.empty()) ReadRegisterClasses();
82 return RegisterClasses;
85 const CodeGenRegisterClass &getRegisterClass(Record *R) const {
86 const std::vector<CodeGenRegisterClass> &RC = getRegisterClasses();
87 for (unsigned i = 0, e = RC.size(); i != e; ++i)
88 if (RC[i].TheDef == R)
90 assert(0 && "Didn't find the register class");
94 const std::vector<MVT::ValueType> &getLegalValueTypes() const {
95 if (LegalValueTypes.empty()) ReadLegalValueTypes();
96 return LegalValueTypes;
99 /// isLegalValueType - Return true if the specified value type is natively
100 /// supported by the target (i.e. there are registers that directly hold it).
101 bool isLegalValueType(MVT::ValueType VT) const {
102 const std::vector<MVT::ValueType> &LegalVTs = getLegalValueTypes();
103 for (unsigned i = 0, e = LegalVTs.size(); i != e; ++i)
104 if (LegalVTs[i] == VT) return true;
108 /// getInstructions - Return all of the instructions defined for this target.
110 const std::map<std::string, CodeGenInstruction> &getInstructions() const {
111 if (Instructions.empty()) ReadInstructions();
115 CodeGenInstruction &getInstruction(const std::string &Name) const {
116 const std::map<std::string, CodeGenInstruction> &Insts = getInstructions();
117 assert(Insts.count(Name) && "Not an instruction!");
118 return const_cast<CodeGenInstruction&>(Insts.find(Name)->second);
121 typedef std::map<std::string,
122 CodeGenInstruction>::const_iterator inst_iterator;
123 inst_iterator inst_begin() const { return getInstructions().begin(); }
124 inst_iterator inst_end() const { return Instructions.end(); }
126 /// getInstructionsByEnumValue - Return all of the instructions defined by the
127 /// target, ordered by their enum value.
128 void getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
129 &NumberedInstructions);
132 /// getPHIInstruction - Return the designated PHI instruction.
134 const CodeGenInstruction &getPHIInstruction() const;
136 /// isLittleEndianEncoding - are instruction bit patterns defined as [0..n]?
138 bool isLittleEndianEncoding() const;
141 } // End llvm namespace