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194f3fa9ea
This reverts commit 151760. We want to move getSubReg() from TargetRegisterInfo into MCRegisterInfo, but to do that, the type of the lookup table needs to be the same for all targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151814 91177308-0d34-0410-b5e6-96231b3b80d8
202 lines
6.3 KiB
C++
202 lines
6.3 KiB
C++
//===- CodeGenTarget.h - Target Class Wrapper -------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines wrappers for the Target class and related global
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// functionality. This makes it easier to access the data and provides a single
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// place that needs to check it for validity. All of these classes throw
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// exceptions on error conditions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CODEGEN_TARGET_H
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#define CODEGEN_TARGET_H
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#include "CodeGenRegisters.h"
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#include "CodeGenInstruction.h"
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#include "llvm/TableGen/Record.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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namespace llvm {
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struct CodeGenRegister;
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class CodeGenTarget;
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// SelectionDAG node properties.
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// SDNPMemOperand: indicates that a node touches memory and therefore must
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// have an associated memory operand that describes the access.
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enum SDNP {
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SDNPCommutative,
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SDNPAssociative,
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SDNPHasChain,
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SDNPOutGlue,
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SDNPInGlue,
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SDNPOptInGlue,
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SDNPMayLoad,
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SDNPMayStore,
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SDNPSideEffect,
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SDNPMemOperand,
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SDNPVariadic,
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SDNPWantRoot,
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SDNPWantParent
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};
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/// getValueType - Return the MVT::SimpleValueType that the specified TableGen
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/// record corresponds to.
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MVT::SimpleValueType getValueType(Record *Rec);
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std::string getName(MVT::SimpleValueType T);
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std::string getEnumName(MVT::SimpleValueType T);
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/// getQualifiedName - Return the name of the specified record, with a
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/// namespace qualifier if the record contains one.
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std::string getQualifiedName(const Record *R);
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/// CodeGenTarget - This class corresponds to the Target class in the .td files.
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///
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class CodeGenTarget {
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RecordKeeper &Records;
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Record *TargetRec;
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mutable DenseMap<const Record*, CodeGenInstruction*> Instructions;
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mutable CodeGenRegBank *RegBank;
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mutable std::vector<Record*> RegAltNameIndices;
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mutable std::vector<MVT::SimpleValueType> LegalValueTypes;
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void ReadRegAltNameIndices() const;
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void ReadInstructions() const;
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void ReadLegalValueTypes() const;
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mutable std::vector<const CodeGenInstruction*> InstrsByEnum;
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public:
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CodeGenTarget(RecordKeeper &Records);
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Record *getTargetRecord() const { return TargetRec; }
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const std::string &getName() const;
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/// getInstNamespace - Return the target-specific instruction namespace.
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///
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std::string getInstNamespace() const;
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/// getInstructionSet - Return the InstructionSet object.
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///
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Record *getInstructionSet() const;
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/// getAsmParser - Return the AssemblyParser definition for this target.
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///
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Record *getAsmParser() const;
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/// getAsmParserVariant - Return the AssmblyParserVariant definition for
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/// this target.
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///
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Record *getAsmParserVariant(unsigned i) const;
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/// getAsmParserVariantCount - Return the AssmblyParserVariant definition
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/// available for this target.
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///
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unsigned getAsmParserVariantCount() const;
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/// getAsmWriter - Return the AssemblyWriter definition for this target.
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///
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Record *getAsmWriter() const;
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/// getRegBank - Return the register bank description.
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CodeGenRegBank &getRegBank() const;
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/// getRegisterByName - If there is a register with the specific AsmName,
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/// return it.
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const CodeGenRegister *getRegisterByName(StringRef Name) const;
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const std::vector<Record*> &getRegAltNameIndices() const {
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if (RegAltNameIndices.empty()) ReadRegAltNameIndices();
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return RegAltNameIndices;
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}
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const CodeGenRegisterClass &getRegisterClass(Record *R) const {
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return *getRegBank().getRegClass(R);
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}
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/// getRegisterVTs - Find the union of all possible SimpleValueTypes for the
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/// specified physical register.
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std::vector<MVT::SimpleValueType> getRegisterVTs(Record *R) const;
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const std::vector<MVT::SimpleValueType> &getLegalValueTypes() const {
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if (LegalValueTypes.empty()) ReadLegalValueTypes();
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return LegalValueTypes;
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}
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/// isLegalValueType - Return true if the specified value type is natively
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/// supported by the target (i.e. there are registers that directly hold it).
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bool isLegalValueType(MVT::SimpleValueType VT) const {
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const std::vector<MVT::SimpleValueType> &LegalVTs = getLegalValueTypes();
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for (unsigned i = 0, e = LegalVTs.size(); i != e; ++i)
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if (LegalVTs[i] == VT) return true;
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return false;
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}
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private:
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DenseMap<const Record*, CodeGenInstruction*> &getInstructions() const {
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if (Instructions.empty()) ReadInstructions();
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return Instructions;
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}
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public:
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CodeGenInstruction &getInstruction(const Record *InstRec) const {
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if (Instructions.empty()) ReadInstructions();
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DenseMap<const Record*, CodeGenInstruction*>::iterator I =
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Instructions.find(InstRec);
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assert(I != Instructions.end() && "Not an instruction");
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return *I->second;
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}
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/// getInstructionsByEnumValue - Return all of the instructions defined by the
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/// target, ordered by their enum value.
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const std::vector<const CodeGenInstruction*> &
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getInstructionsByEnumValue() const {
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if (InstrsByEnum.empty()) ComputeInstrsByEnum();
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return InstrsByEnum;
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}
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typedef std::vector<const CodeGenInstruction*>::const_iterator inst_iterator;
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inst_iterator inst_begin() const{return getInstructionsByEnumValue().begin();}
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inst_iterator inst_end() const { return getInstructionsByEnumValue().end(); }
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/// isLittleEndianEncoding - are instruction bit patterns defined as [0..n]?
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///
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bool isLittleEndianEncoding() const;
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private:
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void ComputeInstrsByEnum() const;
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};
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/// ComplexPattern - ComplexPattern info, corresponding to the ComplexPattern
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/// tablegen class in TargetSelectionDAG.td
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class ComplexPattern {
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MVT::SimpleValueType Ty;
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unsigned NumOperands;
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std::string SelectFunc;
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std::vector<Record*> RootNodes;
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unsigned Properties; // Node properties
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public:
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ComplexPattern() : NumOperands(0) {}
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ComplexPattern(Record *R);
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MVT::SimpleValueType getValueType() const { return Ty; }
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unsigned getNumOperands() const { return NumOperands; }
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const std::string &getSelectFunc() const { return SelectFunc; }
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const std::vector<Record*> &getRootNodes() const {
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return RootNodes;
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}
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bool hasProperty(enum SDNP Prop) const { return Properties & (1 << Prop); }
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};
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} // End llvm namespace
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#endif
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