| //===- CodeGenTarget.h - Target Class Wrapper -------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // 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 LLVM_UTILS_TABLEGEN_CODEGENTARGET_H |
| #define LLVM_UTILS_TABLEGEN_CODEGENTARGET_H |
| |
| #include "CodeGenHwModes.h" |
| #include "InfoByHwMode.h" |
| #include "SDNodeProperties.h" |
| #include "llvm/ADT/ArrayRef.h" |
| #include "llvm/ADT/DenseMap.h" |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/CodeGen/MachineValueType.h" |
| #include <cassert> |
| #include <memory> |
| #include <optional> |
| #include <string> |
| #include <vector> |
| |
| namespace llvm { |
| |
| class RecordKeeper; |
| class Record; |
| class CodeGenInstruction; |
| class CodeGenRegBank; |
| class CodeGenRegister; |
| class CodeGenRegisterClass; |
| class CodeGenSchedModels; |
| class CodeGenSubRegIndex; |
| |
| /// getValueType - Return the MVT::SimpleValueType that the specified TableGen |
| /// record corresponds to. |
| MVT::SimpleValueType getValueType(Record *Rec); |
| |
| StringRef getName(MVT::SimpleValueType T); |
| StringRef 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*, |
| std::unique_ptr<CodeGenInstruction>> Instructions; |
| mutable std::unique_ptr<CodeGenRegBank> RegBank; |
| mutable std::vector<Record*> RegAltNameIndices; |
| mutable SmallVector<ValueTypeByHwMode, 8> LegalValueTypes; |
| CodeGenHwModes CGH; |
| void ReadRegAltNameIndices() const; |
| void ReadInstructions() const; |
| void ReadLegalValueTypes() const; |
| |
| mutable std::unique_ptr<CodeGenSchedModels> SchedModels; |
| |
| mutable StringRef InstNamespace; |
| mutable std::vector<const CodeGenInstruction*> InstrsByEnum; |
| mutable unsigned NumPseudoInstructions = 0; |
| public: |
| CodeGenTarget(RecordKeeper &Records); |
| ~CodeGenTarget(); |
| |
| Record *getTargetRecord() const { return TargetRec; } |
| StringRef getName() const; |
| |
| /// getInstNamespace - Return the target-specific instruction namespace. |
| /// |
| StringRef getInstNamespace() const; |
| |
| /// getRegNamespace - Return the target-specific register namespace. |
| StringRef getRegNamespace() const; |
| |
| /// getInstructionSet - Return the InstructionSet object. |
| /// |
| Record *getInstructionSet() const; |
| |
| /// getAllowRegisterRenaming - Return the AllowRegisterRenaming flag value for |
| /// this target. |
| /// |
| bool getAllowRegisterRenaming() const; |
| |
| /// getAsmParser - Return the AssemblyParser definition for this target. |
| /// |
| Record *getAsmParser() const; |
| |
| /// getAsmParserVariant - Return the AssemblyParserVariant definition for |
| /// this target. |
| /// |
| Record *getAsmParserVariant(unsigned i) const; |
| |
| /// getAsmParserVariantCount - Return the AssemblyParserVariant 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; |
| |
| /// Return the largest register class on \p RegBank which supports \p Ty and |
| /// covers \p SubIdx if it exists. |
| std::optional<CodeGenRegisterClass *> |
| getSuperRegForSubReg(const ValueTypeByHwMode &Ty, CodeGenRegBank &RegBank, |
| const CodeGenSubRegIndex *SubIdx, |
| bool MustBeAllocatable = false) 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; |
| |
| /// getRegisterVTs - Find the union of all possible SimpleValueTypes for the |
| /// specified physical register. |
| std::vector<ValueTypeByHwMode> getRegisterVTs(Record *R) const; |
| |
| ArrayRef<ValueTypeByHwMode> getLegalValueTypes() const { |
| if (LegalValueTypes.empty()) |
| ReadLegalValueTypes(); |
| return LegalValueTypes; |
| } |
| |
| CodeGenSchedModels &getSchedModels() const; |
| |
| const CodeGenHwModes &getHwModes() const { return CGH; } |
| |
| private: |
| DenseMap<const Record*, std::unique_ptr<CodeGenInstruction>> & |
| getInstructions() const { |
| if (Instructions.empty()) ReadInstructions(); |
| return Instructions; |
| } |
| public: |
| |
| CodeGenInstruction &getInstruction(const Record *InstRec) const { |
| if (Instructions.empty()) ReadInstructions(); |
| auto I = Instructions.find(InstRec); |
| assert(I != Instructions.end() && "Not an instruction"); |
| return *I->second; |
| } |
| |
| /// Returns the number of predefined instructions. |
| static unsigned getNumFixedInstructions(); |
| |
| /// Returns the number of pseudo instructions. |
| unsigned getNumPseudoInstructions() const { |
| if (InstrsByEnum.empty()) |
| ComputeInstrsByEnum(); |
| return NumPseudoInstructions; |
| } |
| |
| /// Return all of the instructions defined by the target, ordered by their |
| /// enum value. |
| /// The following order of instructions is also guaranteed: |
| /// - fixed / generic instructions as declared in TargetOpcodes.def, in order; |
| /// - pseudo instructions in lexicographical order sorted by name; |
| /// - other instructions in lexicographical order sorted by name. |
| ArrayRef<const CodeGenInstruction *> getInstructionsByEnumValue() const { |
| if (InstrsByEnum.empty()) |
| ComputeInstrsByEnum(); |
| return InstrsByEnum; |
| } |
| |
| typedef ArrayRef<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; |
| |
| /// reverseBitsForLittleEndianEncoding - For little-endian instruction bit |
| /// encodings, reverse the bit order of all instructions. |
| void reverseBitsForLittleEndianEncoding(); |
| |
| /// 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 { |
| Record *Ty; |
| unsigned NumOperands; |
| std::string SelectFunc; |
| std::vector<Record*> RootNodes; |
| unsigned Properties; // Node properties |
| unsigned Complexity; |
| public: |
| ComplexPattern(Record *R); |
| |
| Record *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); } |
| unsigned getComplexity() const { return Complexity; } |
| }; |
| |
| } // End llvm namespace |
| |
| #endif |