1 //===- llvm/MC/MCParsedAsmOperand.h - Asm Parser Operand --------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef LLVM_MC_MCPARSER_MCPARSEDASMOPERAND_H 11 #define LLVM_MC_MCPARSER_MCPARSEDASMOPERAND_H 12 13 #include "llvm/ADT/StringRef.h" 14 #include "llvm/Support/SMLoc.h" 15 #include <string> 16 17 namespace llvm { 18 19 class raw_ostream; 20 21 /// MCParsedAsmOperand - This abstract class represents a source-level assembly 22 /// instruction operand. It should be subclassed by target-specific code. This 23 /// base class is used by target-independent clients and is the interface 24 /// between parsing an asm instruction and recognizing it. 25 class MCParsedAsmOperand { 26 /// MCOperandNum - The corresponding MCInst operand number. Only valid when 27 /// parsing MS-style inline assembly. 28 unsigned MCOperandNum; 29 30 /// Constraint - The constraint on this operand. Only valid when parsing 31 /// MS-style inline assembly. 32 std::string Constraint; 33 34 protected: 35 // This only seems to need to be movable (by ARMOperand) but ARMOperand has 36 // lots of members and MSVC doesn't support defaulted move ops, so to avoid 37 // that verbosity, just rely on defaulted copy ops. It's only the Constraint 38 // string member that would benefit from movement anyway. 39 MCParsedAsmOperand() = default; 40 MCParsedAsmOperand(const MCParsedAsmOperand &RHS) = default; 41 MCParsedAsmOperand &operator=(const MCParsedAsmOperand &) = default; 42 43 public: 44 virtual ~MCParsedAsmOperand() = default; 45 46 void setConstraint(StringRef C) { Constraint = C.str(); } 47 StringRef getConstraint() { return Constraint; } 48 49 void setMCOperandNum (unsigned OpNum) { MCOperandNum = OpNum; } 50 unsigned getMCOperandNum() { return MCOperandNum; } 51 52 virtual StringRef getSymName() { return StringRef(); } 53 virtual void *getOpDecl() { return nullptr; } 54 55 /// isToken - Is this a token operand? 56 virtual bool isToken() const = 0; 57 /// isImm - Is this an immediate operand? 58 virtual bool isImm() const = 0; 59 /// isReg - Is this a register operand? 60 virtual bool isReg() const = 0; 61 virtual unsigned getReg() const = 0; 62 63 /// isMem - Is this a memory operand? 64 virtual bool isMem() const = 0; 65 66 /// getStartLoc - Get the location of the first token of this operand. 67 virtual SMLoc getStartLoc() const = 0; 68 /// getEndLoc - Get the location of the last token of this operand. 69 virtual SMLoc getEndLoc() const = 0; 70 71 /// needAddressOf - Do we need to emit code to get the address of the 72 /// variable/label? Only valid when parsing MS-style inline assembly. 73 virtual bool needAddressOf() const { return false; } 74 75 /// isOffsetOf - Do we need to emit code to get the offset of the variable, 76 /// rather then the value of the variable? Only valid when parsing MS-style 77 /// inline assembly. 78 virtual bool isOffsetOf() const { return false; } 79 80 /// getOffsetOfLoc - Get the location of the offset operator. 81 virtual SMLoc getOffsetOfLoc() const { return SMLoc(); } 82 83 /// print - Print a debug representation of the operand to the given stream. 84 virtual void print(raw_ostream &OS) const = 0; 85 86 /// dump - Print to the debug stream. 87 virtual void dump() const; 88 }; 89 90 //===----------------------------------------------------------------------===// 91 // Debugging Support 92 93 inline raw_ostream& operator<<(raw_ostream &OS, const MCParsedAsmOperand &MO) { 94 MO.print(OS); 95 return OS; 96 } 97 98 } // end namespace llvm 99 100 #endif // LLVM_MC_MCPARSER_MCPARSEDASMOPERAND_H 101
