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CodeGenDAGPatterns, where it can be used in other tablegen backends. This allows the inference to be done for DAGISelEmitter so that it gets accurate mayLoad/mayStore/isSimpleLoad flags. This brings MemOperand functionality back to where it was before 48329. However, it doesn't solve the problem of anonymous patterns which expand to code that does loads or stores. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49123 91177308-0d34-0410-b5e6-96231b3b80d8
201 lines
6.6 KiB
C++
201 lines
6.6 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 <iosfwd>
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#include <map>
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namespace llvm {
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class Record;
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class RecordKeeper;
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struct CodeGenRegister;
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class CodeGenTarget;
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// SelectionDAG node properties.
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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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SDNPOutFlag,
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SDNPInFlag,
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SDNPOptInFlag,
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SDNPMayLoad,
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SDNPMayStore,
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SDNPSideEffect
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};
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// ComplexPattern attributes.
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enum CPAttr { CPAttrParentAsRoot };
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/// getValueType - Return the MVT::ValueType that the specified TableGen record
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/// corresponds to.
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MVT::ValueType getValueType(Record *Rec);
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std::string getName(MVT::ValueType T);
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std::string getEnumName(MVT::ValueType 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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Record *TargetRec;
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mutable std::map<std::string, CodeGenInstruction> Instructions;
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mutable std::vector<CodeGenRegister> Registers;
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mutable std::vector<CodeGenRegisterClass> RegisterClasses;
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mutable std::vector<MVT::ValueType> LegalValueTypes;
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void ReadRegisters() const;
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void ReadRegisterClasses() const;
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void ReadInstructions() const;
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void ReadLegalValueTypes() const;
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public:
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CodeGenTarget();
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Record *getTargetRecord() const { return TargetRec; }
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const std::string &getName() 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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/// getAsmWriter - Return the AssemblyWriter definition for this target.
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///
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Record *getAsmWriter() const;
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const std::vector<CodeGenRegister> &getRegisters() const {
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if (Registers.empty()) ReadRegisters();
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return Registers;
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}
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const std::vector<CodeGenRegisterClass> &getRegisterClasses() const {
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if (RegisterClasses.empty()) ReadRegisterClasses();
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return RegisterClasses;
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}
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const CodeGenRegisterClass &getRegisterClass(Record *R) const {
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const std::vector<CodeGenRegisterClass> &RC = getRegisterClasses();
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for (unsigned i = 0, e = RC.size(); i != e; ++i)
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if (RC[i].TheDef == R)
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return RC[i];
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assert(0 && "Didn't find the register class");
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abort();
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}
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/// getRegisterClassForRegister - Find the register class that contains the
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/// specified physical register. If there register exists in multiple
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/// register classes or is not in a register class, return null.
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const CodeGenRegisterClass *getRegisterClassForRegister(Record *R) const {
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const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
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const CodeGenRegisterClass *FoundRC = 0;
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for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
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const CodeGenRegisterClass &RC = RegisterClasses[i];
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for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
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if (R == RC.Elements[ei]) {
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if (FoundRC) return 0; // In multiple RC's
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FoundRC = &RC;
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break;
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}
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}
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}
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return FoundRC;
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}
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/// getRegisterVTs - Find the union of all possible ValueTypes for the
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/// specified physical register.
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std::vector<unsigned char> getRegisterVTs(Record *R) const;
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const std::vector<MVT::ValueType> &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::ValueType VT) const {
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const std::vector<MVT::ValueType> &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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/// getInstructions - Return all of the instructions defined for this target.
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///
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const std::map<std::string, 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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std::map<std::string, CodeGenInstruction> &getInstructions() {
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if (Instructions.empty()) ReadInstructions();
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return Instructions;
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}
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CodeGenInstruction &getInstruction(const std::string &Name) const {
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const std::map<std::string, CodeGenInstruction> &Insts = getInstructions();
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assert(Insts.count(Name) && "Not an instruction!");
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return const_cast<CodeGenInstruction&>(Insts.find(Name)->second);
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}
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typedef std::map<std::string,
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CodeGenInstruction>::const_iterator inst_iterator;
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inst_iterator inst_begin() const { return getInstructions().begin(); }
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inst_iterator inst_end() const { return Instructions.end(); }
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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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void getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
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&NumberedInstructions);
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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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};
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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::ValueType 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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unsigned Attributes; // Pattern attributes
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public:
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ComplexPattern() : NumOperands(0) {};
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ComplexPattern(Record *R);
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MVT::ValueType 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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bool hasAttribute(enum CPAttr Attr) const { return Attributes & (1 << Attr); }
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};
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} // End llvm namespace
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#endif
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