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
14 #include "llvm/ADT/StringRef.h"
15 #include "llvm/Support/SMLoc.h"
20 /// MCParsedAsmOperand - This abstract class represents a source-level assembly
21 /// instruction operand. It should be subclassed by target-specific code. This
22 /// base class is used by target-independent clients and is the interface
23 /// between parsing an asm instruction and recognizing it.
24 class MCParsedAsmOperand {
25 /// MCOperandNum - The corresponding MCInst operand number. Only valid when
26 /// parsing MS-style inline assembly.
27 unsigned MCOperandNum;
29 /// Constraint - The constraint on this operand. Only valid when parsing
30 /// MS-style inline assembly.
31 std::string Constraint;
34 // This only seems to need to be movable (by ARMOperand) but ARMOperand has
35 // lots of members and MSVC doesn't support defaulted move ops, so to avoid
36 // that verbosity, just rely on defaulted copy ops. It's only the Constraint
37 // string member that would benefit from movement anyway.
38 MCParsedAsmOperand(const MCParsedAsmOperand &RHS) = default;
39 MCParsedAsmOperand &operator=(const MCParsedAsmOperand &) = default;
40 MCParsedAsmOperand() = default;
43 virtual ~MCParsedAsmOperand() = default;
45 void setConstraint(StringRef C) { Constraint = C.str(); }
46 StringRef getConstraint() { return Constraint; }
48 void setMCOperandNum (unsigned OpNum) { MCOperandNum = OpNum; }
49 unsigned getMCOperandNum() { return MCOperandNum; }
51 virtual StringRef getSymName() { return StringRef(); }
52 virtual void *getOpDecl() { return nullptr; }
54 /// isToken - Is this a token operand?
55 virtual bool isToken() const = 0;
56 /// isImm - Is this an immediate operand?
57 virtual bool isImm() const = 0;
58 /// isReg - Is this a register operand?
59 virtual bool isReg() const = 0;
60 virtual unsigned getReg() const = 0;
62 /// isMem - Is this a memory operand?
63 virtual bool isMem() const = 0;
65 /// getStartLoc - Get the location of the first token of this operand.
66 virtual SMLoc getStartLoc() const = 0;
67 /// getEndLoc - Get the location of the last token of this operand.
68 virtual SMLoc getEndLoc() const = 0;
70 /// needAddressOf - Do we need to emit code to get the address of the
71 /// variable/label? Only valid when parsing MS-style inline assembly.
72 virtual bool needAddressOf() const { return false; }
74 /// isOffsetOf - Do we need to emit code to get the offset of the variable,
75 /// rather then the value of the variable? Only valid when parsing MS-style
77 virtual bool isOffsetOf() const { return false; }
79 /// getOffsetOfLoc - Get the location of the offset operator.
80 virtual SMLoc getOffsetOfLoc() const { return SMLoc(); }
82 /// print - Print a debug representation of the operand to the given stream.
83 virtual void print(raw_ostream &OS) const = 0;
84 /// dump - Print to the debug stream.
85 virtual void dump() const;
88 //===----------------------------------------------------------------------===//
91 inline raw_ostream& operator<<(raw_ostream &OS, const MCParsedAsmOperand &MO) {
96 } // end namespace llvm.