//===- AsmWriterInst.h - Classes encapsulating a printable inst -*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // These classes implement a parser for assembly strings. The parser splits // the string into operands, which can be literal strings (the constant bits of // the string), actual operands (i.e., operands from the MachineInstr), and // dynamically-generated text, specified by raw C++ code. // //===----------------------------------------------------------------------===// #ifndef LLVM_UTILS_TABLEGEN_ASMWRITERINST_H #define LLVM_UTILS_TABLEGEN_ASMWRITERINST_H #include <string> #include <vector> namespace llvm { class CodeGenInstruction; class Record; struct AsmWriterOperand { enum OpType { // Output this text surrounded by quotes to the asm. isLiteralTextOperand, // This is the name of a routine to call to print the operand. isMachineInstrOperand, // Output this text verbatim to the asm writer. It is code that // will output some text to the asm. isLiteralStatementOperand } OperandType; /// MiOpNo - For isMachineInstrOperand, this is the operand number of the /// machine instruction. unsigned MIOpNo; /// Str - For isLiteralTextOperand, this IS the literal text. For /// isMachineInstrOperand, this is the PrinterMethodName for the operand.. /// For isLiteralStatementOperand, this is the code to insert verbatim /// into the asm writer. std::string Str; /// MiModifier - For isMachineInstrOperand, this is the modifier string for /// an operand, specified with syntax like ${opname:modifier}. std::string MiModifier; // To make VS STL happy AsmWriterOperand(OpType op = isLiteralTextOperand):OperandType(op) {} AsmWriterOperand(const std::string &LitStr, OpType op = isLiteralTextOperand) : OperandType(op), Str(LitStr) {} AsmWriterOperand(const std::string &Printer, unsigned _MIOpNo, const std::string &Modifier, OpType op = isMachineInstrOperand) : OperandType(op), MIOpNo(_MIOpNo), Str(Printer), MiModifier(Modifier) {} bool operator!=(const AsmWriterOperand &Other) const { if (OperandType != Other.OperandType || Str != Other.Str) return true; if (OperandType == isMachineInstrOperand) return MIOpNo != Other.MIOpNo || MiModifier != Other.MiModifier; return false; } bool operator==(const AsmWriterOperand &Other) const { return !operator!=(Other); } /// getCode - Return the code that prints this operand. std::string getCode(bool PassSubtarget) const; }; class AsmWriterInst { public: std::vector<AsmWriterOperand> Operands; const CodeGenInstruction *CGI; unsigned CGIIndex; AsmWriterInst(const CodeGenInstruction &CGI, unsigned CGIIndex, unsigned Variant); /// MatchesAllButOneOp - If this instruction is exactly identical to the /// specified instruction except for one differing operand, return the /// differing operand number. Otherwise return ~0. unsigned MatchesAllButOneOp(const AsmWriterInst &Other) const; private: void AddLiteralString(const std::string &Str) { // If the last operand was already a literal text string, append this to // it, otherwise add a new operand. if (!Operands.empty() && Operands.back().OperandType == AsmWriterOperand::isLiteralTextOperand) Operands.back().Str.append(Str); else Operands.push_back(AsmWriterOperand(Str)); } }; } #endif