1 //===-- llvm/MC/MCValue.h - MCValue class -----------------------*- 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 // This file contains the declaration of the MCValue class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_MC_MCVALUE_H
15 #define LLVM_MC_MCVALUE_H
17 #include "llvm/System/DataTypes.h"
18 #include "llvm/MC/MCSymbol.h"
26 /// MCValue - This represents an "assembler immediate". In its most general
27 /// form, this can hold "SymbolA - SymbolB + imm64". Not all targets supports
28 /// relocations of this general form, but we need to represent this anyway.
30 /// In the general form, SymbolB can only be defined if SymbolA is, and both
31 /// must be in the same (non-external) section. The latter constraint is not
32 /// enforced, since a symbol's section may not be known at construction.
34 /// Note that this class must remain a simple POD value class, because we need
35 /// it to live in unions etc.
37 const MCSymbol *SymA, *SymB;
41 int64_t getConstant() const { return Cst; }
42 const MCSymbol *getSymA() const { return SymA; }
43 const MCSymbol *getSymB() const { return SymB; }
45 /// isAbsolute - Is this an absolute (as opposed to relocatable) value.
46 bool isAbsolute() const { return !SymA && !SymB; }
48 /// getAssociatedSection - For relocatable values, return the section the
49 /// value is associated with.
51 /// @result - The value's associated section, or null for external or constant
54 // FIXME: Switch to a tagged section, so this can return the tagged section
56 const MCSection *getAssociatedSection() const;
58 /// print - Print the value to the stream \arg OS.
59 void print(raw_ostream &OS, const MCAsmInfo *MAI) const;
61 /// dump - Print the value to stderr.
64 static MCValue get(const MCSymbol *SymA, const MCSymbol *SymB = 0,
67 assert((!SymB || SymA) && "Invalid relocatable MCValue!");
74 static MCValue get(int64_t Val) {
84 } // end namespace llvm