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 void ReadRegisters() const;
51 void ReadRegisterClasses() const;
52 void ReadInstructions() const;
56 Record *getTargetRecord() const { return TargetRec; }
57 const std::string &getName() const;
59 const std::vector<Record*> &getCalleeSavedRegisters() const {
60 return CalleeSavedRegisters;
63 MVT::ValueType getPointerType() const { return PointerType; }
65 /// getInstructionSet - Return the InstructionSet object.
67 Record *getInstructionSet() const;
69 /// getAsmWriter - Return the AssemblyWriter definition for this target.
71 Record *getAsmWriter() const;
73 const std::vector<CodeGenRegister> &getRegisters() {
74 if (Registers.empty()) ReadRegisters();
78 const std::vector<CodeGenRegisterClass> getRegisterClasses() {
79 if (RegisterClasses.empty()) ReadRegisterClasses();
80 return RegisterClasses;
84 /// getInstructions - Return all of the instructions defined for this target.
86 const std::map<std::string, CodeGenInstruction> &getInstructions() const {
87 if (Instructions.empty()) ReadInstructions();
91 typedef std::map<std::string,
92 CodeGenInstruction>::const_iterator inst_iterator;
93 inst_iterator inst_begin() const { return getInstructions().begin(); }
94 inst_iterator inst_end() const { return Instructions.end(); }
96 /// getInstructionsByEnumValue - Return all of the instructions defined by the
97 /// target, ordered by their enum value.
98 void getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
99 &NumberedInstructions);
102 /// getPHIInstruction - Return the designated PHI instruction.
104 const CodeGenInstruction &getPHIInstruction() const;
106 /// isLittleEndianEncoding - are instruction bit patterns defined as [0..n]?
108 bool isLittleEndianEncoding() const;
111 } // End llvm namespace