1 //===- llvm/MC/MCParsedAsmOperand.h - Asm Parser Operand --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_MC_MCPARSER_MCPARSEDASMOPERAND_H
11 #define LLVM_MC_MCPARSER_MCPARSEDASMOPERAND_H
13 #include "llvm/ADT/StringRef.h"
14 #include "llvm/Support/SMLoc.h"
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;
30 /// Constraint - The constraint on this operand. Only valid when parsing
31 /// MS-style inline assembly.
32 std::string Constraint;
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;
44 virtual ~MCParsedAsmOperand() = default;
46 void setConstraint(StringRef C) { Constraint = C.str(); }
47 StringRef getConstraint() { return Constraint; }
49 void setMCOperandNum (unsigned OpNum) { MCOperandNum = OpNum; }
50 unsigned getMCOperandNum() { return MCOperandNum; }
52 virtual StringRef getSymName() { return StringRef(); }
53 virtual void *getOpDecl() { return nullptr; }
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;
63 /// isMem - Is this a memory operand?
64 virtual bool isMem() const = 0;
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;
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; }
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
78 virtual bool isOffsetOf() const { return false; }
80 /// getOffsetOfLoc - Get the location of the offset operator.
81 virtual SMLoc getOffsetOfLoc() const { return SMLoc(); }
83 /// print - Print a debug representation of the operand to the given stream.
84 virtual void print(raw_ostream &OS) const = 0;
86 /// dump - Print to the debug stream.
87 virtual void dump() const;
90 //===----------------------------------------------------------------------===//
93 inline raw_ostream& operator<<(raw_ostream &OS, const MCParsedAsmOperand &MO) {
98 } // end namespace llvm
100 #endif // LLVM_MC_MCPARSER_MCPARSEDASMOPERAND_H