+ class DagInit;
+ class CodeGenTarget;
+ class StringRef;
+
+ class CGIOperandList {
+ public:
+ class ConstraintInfo {
+ enum { None, EarlyClobber, Tied } Kind;
+ unsigned OtherTiedOperand;
+ public:
+ ConstraintInfo() : Kind(None) {}
+
+ static ConstraintInfo getEarlyClobber() {
+ ConstraintInfo I;
+ I.Kind = EarlyClobber;
+ I.OtherTiedOperand = 0;
+ return I;
+ }
+
+ static ConstraintInfo getTied(unsigned Op) {
+ ConstraintInfo I;
+ I.Kind = Tied;
+ I.OtherTiedOperand = Op;
+ return I;
+ }
+
+ bool isNone() const { return Kind == None; }
+ bool isEarlyClobber() const { return Kind == EarlyClobber; }
+ bool isTied() const { return Kind == Tied; }
+
+ unsigned getTiedOperand() const {
+ assert(isTied());
+ return OtherTiedOperand;
+ }
+ };
+
+ /// OperandInfo - The information we keep track of for each operand in the
+ /// operand list for a tablegen instruction.
+ struct OperandInfo {
+ /// Rec - The definition this operand is declared as.
+ ///
+ Record *Rec;
+
+ /// Name - If this operand was assigned a symbolic name, this is it,
+ /// otherwise, it's empty.
+ std::string Name;
+
+ /// PrinterMethodName - The method used to print operands of this type in
+ /// the asmprinter.
+ std::string PrinterMethodName;
+
+ /// EncoderMethodName - The method used to get the machine operand value
+ /// for binary encoding. "getMachineOpValue" by default.
+ std::string EncoderMethodName;
+
+ /// OperandType - A value from MCOI::OperandType representing the type of
+ /// the operand.
+ std::string OperandType;
+
+ /// MIOperandNo - Currently (this is meant to be phased out), some logical
+ /// operands correspond to multiple MachineInstr operands. In the X86
+ /// target for example, one address operand is represented as 4
+ /// MachineOperands. Because of this, the operand number in the
+ /// OperandList may not match the MachineInstr operand num. Until it
+ /// does, this contains the MI operand index of this operand.
+ unsigned MIOperandNo;
+ unsigned MINumOperands; // The number of operands.
+
+ /// DoNotEncode - Bools are set to true in this vector for each operand in
+ /// the DisableEncoding list. These should not be emitted by the code
+ /// emitter.
+ std::vector<bool> DoNotEncode;
+
+ /// MIOperandInfo - Default MI operand type. Note an operand may be made
+ /// up of multiple MI operands.
+ DagInit *MIOperandInfo;
+
+ /// Constraint info for this operand. This operand can have pieces, so we
+ /// track constraint info for each.
+ std::vector<ConstraintInfo> Constraints;
+
+ OperandInfo(Record *R, const std::string &N, const std::string &PMN,
+ const std::string &EMN, const std::string &OT, unsigned MION,
+ unsigned MINO, DagInit *MIOI)
+ : Rec(R), Name(N), PrinterMethodName(PMN), EncoderMethodName(EMN),
+ OperandType(OT), MIOperandNo(MION), MINumOperands(MINO),
+ MIOperandInfo(MIOI) {}
+
+
+ /// getTiedOperand - If this operand is tied to another one, return the
+ /// other operand number. Otherwise, return -1.
+ int getTiedRegister() const {
+ for (unsigned j = 0, e = Constraints.size(); j != e; ++j) {
+ const CGIOperandList::ConstraintInfo &CI = Constraints[j];
+ if (CI.isTied()) return CI.getTiedOperand();
+ }
+ return -1;
+ }
+ };
+
+ CGIOperandList(Record *D);
+
+ Record *TheDef; // The actual record containing this OperandList.
+
+ /// NumDefs - Number of def operands declared, this is the number of
+ /// elements in the instruction's (outs) list.
+ ///
+ unsigned NumDefs;
+
+ /// OperandList - The list of declared operands, along with their declared
+ /// type (which is a record).
+ std::vector<OperandInfo> OperandList;
+
+ // Information gleaned from the operand list.
+ bool isPredicable;
+ bool hasOptionalDef;
+ bool isVariadic;
+
+ // Provide transparent accessors to the operand list.
+ bool empty() const { return OperandList.empty(); }
+ unsigned size() const { return OperandList.size(); }
+ const OperandInfo &operator[](unsigned i) const { return OperandList[i]; }
+ OperandInfo &operator[](unsigned i) { return OperandList[i]; }
+ OperandInfo &back() { return OperandList.back(); }
+ const OperandInfo &back() const { return OperandList.back(); }
+
+
+ /// getOperandNamed - Return the index of the operand with the specified
+ /// non-empty name. If the instruction does not have an operand with the
+ /// specified name, abort.
+ unsigned getOperandNamed(StringRef Name) const;
+
+ /// hasOperandNamed - Query whether the instruction has an operand of the
+ /// given name. If so, return true and set OpIdx to the index of the
+ /// operand. Otherwise, return false.
+ bool hasOperandNamed(StringRef Name, unsigned &OpIdx) const;
+
+ /// ParseOperandName - Parse an operand name like "$foo" or "$foo.bar",
+ /// where $foo is a whole operand and $foo.bar refers to a suboperand.
+ /// This aborts if the name is invalid. If AllowWholeOp is true, references
+ /// to operands with suboperands are allowed, otherwise not.
+ std::pair<unsigned,unsigned> ParseOperandName(const std::string &Op,
+ bool AllowWholeOp = true);
+
+ /// getFlattenedOperandNumber - Flatten a operand/suboperand pair into a
+ /// flat machineinstr operand #.
+ unsigned getFlattenedOperandNumber(std::pair<unsigned,unsigned> Op) const {
+ return OperandList[Op.first].MIOperandNo + Op.second;
+ }
+
+ /// getSubOperandNumber - Unflatten a operand number into an
+ /// operand/suboperand pair.
+ std::pair<unsigned,unsigned> getSubOperandNumber(unsigned Op) const {
+ for (unsigned i = 0; ; ++i) {
+ assert(i < OperandList.size() && "Invalid flat operand #");
+ if (OperandList[i].MIOperandNo+OperandList[i].MINumOperands > Op)
+ return std::make_pair(i, Op-OperandList[i].MIOperandNo);
+ }
+ }