/3rd_party/llvm/utils/TableGen/CodeGenTarget.h
https://code.google.com/p/softart/ · C++ Header · 211 lines · 119 code · 39 blank · 53 comment · 11 complexity · c80d6a0775cadc83da54b952d8a9f7d8 MD5 · raw file
- //===- CodeGenTarget.h - Target Class Wrapper -------------------*- C++ -*-===//
- //
- // The LLVM Compiler Infrastructure
- //
- // This file is distributed under the University of Illinois Open Source
- // License. See LICENSE.TXT for details.
- //
- //===----------------------------------------------------------------------===//
- //
- // This file defines wrappers for the Target class and related global
- // functionality. This makes it easier to access the data and provides a single
- // place that needs to check it for validity. All of these classes abort
- // on error conditions.
- //
- //===----------------------------------------------------------------------===//
- #ifndef CODEGEN_TARGET_H
- #define CODEGEN_TARGET_H
- #include "CodeGenInstruction.h"
- #include "CodeGenRegisters.h"
- #include "llvm/Support/raw_ostream.h"
- #include "llvm/TableGen/Record.h"
- #include <algorithm>
- namespace llvm {
- struct CodeGenRegister;
- class CodeGenSchedModels;
- class CodeGenTarget;
- // SelectionDAG node properties.
- // SDNPMemOperand: indicates that a node touches memory and therefore must
- // have an associated memory operand that describes the access.
- enum SDNP {
- SDNPCommutative,
- SDNPAssociative,
- SDNPHasChain,
- SDNPOutGlue,
- SDNPInGlue,
- SDNPOptInGlue,
- SDNPMayLoad,
- SDNPMayStore,
- SDNPSideEffect,
- SDNPMemOperand,
- SDNPVariadic,
- SDNPWantRoot,
- SDNPWantParent
- };
- /// getValueType - Return the MVT::SimpleValueType that the specified TableGen
- /// record corresponds to.
- MVT::SimpleValueType getValueType(Record *Rec);
- std::string getName(MVT::SimpleValueType T);
- std::string getEnumName(MVT::SimpleValueType T);
- /// getQualifiedName - Return the name of the specified record, with a
- /// namespace qualifier if the record contains one.
- std::string getQualifiedName(const Record *R);
- /// CodeGenTarget - This class corresponds to the Target class in the .td files.
- ///
- class CodeGenTarget {
- RecordKeeper &Records;
- Record *TargetRec;
- mutable DenseMap<const Record*, CodeGenInstruction*> Instructions;
- mutable CodeGenRegBank *RegBank;
- mutable std::vector<Record*> RegAltNameIndices;
- mutable SmallVector<MVT::SimpleValueType, 8> LegalValueTypes;
- void ReadRegAltNameIndices() const;
- void ReadInstructions() const;
- void ReadLegalValueTypes() const;
- mutable CodeGenSchedModels *SchedModels;
- mutable std::vector<const CodeGenInstruction*> InstrsByEnum;
- public:
- CodeGenTarget(RecordKeeper &Records);
- ~CodeGenTarget();
- Record *getTargetRecord() const { return TargetRec; }
- const std::string &getName() const;
- /// getInstNamespace - Return the target-specific instruction namespace.
- ///
- std::string getInstNamespace() const;
- /// getInstructionSet - Return the InstructionSet object.
- ///
- Record *getInstructionSet() const;
- /// getAsmParser - Return the AssemblyParser definition for this target.
- ///
- Record *getAsmParser() const;
- /// getAsmParserVariant - Return the AssmblyParserVariant definition for
- /// this target.
- ///
- Record *getAsmParserVariant(unsigned i) const;
- /// getAsmParserVariantCount - Return the AssmblyParserVariant definition
- /// available for this target.
- ///
- unsigned getAsmParserVariantCount() const;
- /// getAsmWriter - Return the AssemblyWriter definition for this target.
- ///
- Record *getAsmWriter() const;
- /// getRegBank - Return the register bank description.
- CodeGenRegBank &getRegBank() const;
- /// getRegisterByName - If there is a register with the specific AsmName,
- /// return it.
- const CodeGenRegister *getRegisterByName(StringRef Name) const;
- const std::vector<Record*> &getRegAltNameIndices() const {
- if (RegAltNameIndices.empty()) ReadRegAltNameIndices();
- return RegAltNameIndices;
- }
- const CodeGenRegisterClass &getRegisterClass(Record *R) const {
- return *getRegBank().getRegClass(R);
- }
- /// getRegisterVTs - Find the union of all possible SimpleValueTypes for the
- /// specified physical register.
- std::vector<MVT::SimpleValueType> getRegisterVTs(Record *R) const;
- ArrayRef<MVT::SimpleValueType> getLegalValueTypes() const {
- if (LegalValueTypes.empty()) ReadLegalValueTypes();
- return LegalValueTypes;
- }
- /// isLegalValueType - Return true if the specified value type is natively
- /// supported by the target (i.e. there are registers that directly hold it).
- bool isLegalValueType(MVT::SimpleValueType VT) const {
- ArrayRef<MVT::SimpleValueType> LegalVTs = getLegalValueTypes();
- for (unsigned i = 0, e = LegalVTs.size(); i != e; ++i)
- if (LegalVTs[i] == VT) return true;
- return false;
- }
- CodeGenSchedModels &getSchedModels() const;
- private:
- DenseMap<const Record*, CodeGenInstruction*> &getInstructions() const {
- if (Instructions.empty()) ReadInstructions();
- return Instructions;
- }
- public:
- CodeGenInstruction &getInstruction(const Record *InstRec) const {
- if (Instructions.empty()) ReadInstructions();
- DenseMap<const Record*, CodeGenInstruction*>::iterator I =
- Instructions.find(InstRec);
- assert(I != Instructions.end() && "Not an instruction");
- return *I->second;
- }
- /// getInstructionsByEnumValue - Return all of the instructions defined by the
- /// target, ordered by their enum value.
- const std::vector<const CodeGenInstruction*> &
- getInstructionsByEnumValue() const {
- if (InstrsByEnum.empty()) ComputeInstrsByEnum();
- return InstrsByEnum;
- }
- typedef std::vector<const CodeGenInstruction*>::const_iterator inst_iterator;
- inst_iterator inst_begin() const{return getInstructionsByEnumValue().begin();}
- inst_iterator inst_end() const { return getInstructionsByEnumValue().end(); }
- /// isLittleEndianEncoding - are instruction bit patterns defined as [0..n]?
- ///
- bool isLittleEndianEncoding() const;
- /// guessInstructionProperties - should we just guess unset instruction
- /// properties?
- bool guessInstructionProperties() const;
- private:
- void ComputeInstrsByEnum() const;
- };
- /// ComplexPattern - ComplexPattern info, corresponding to the ComplexPattern
- /// tablegen class in TargetSelectionDAG.td
- class ComplexPattern {
- MVT::SimpleValueType Ty;
- unsigned NumOperands;
- std::string SelectFunc;
- std::vector<Record*> RootNodes;
- unsigned Properties; // Node properties
- public:
- ComplexPattern() : NumOperands(0) {}
- ComplexPattern(Record *R);
- MVT::SimpleValueType getValueType() const { return Ty; }
- unsigned getNumOperands() const { return NumOperands; }
- const std::string &getSelectFunc() const { return SelectFunc; }
- const std::vector<Record*> &getRootNodes() const {
- return RootNodes;
- }
- bool hasProperty(enum SDNP Prop) const { return Properties & (1 << Prop); }
- };
- } // End llvm namespace
- #endif