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/MC/MCExpr.h"
18 #include "llvm/MC/MCSymbol.h"
19 #include "llvm/Support/DataTypes.h"
26 /// \brief This represents an "assembler immediate".
28 /// In its most general form, this can hold ":Kind:(SymbolA - SymbolB +
29 /// imm64)". Not all targets supports relocations of this general form, but we
30 /// need to represent this anyway.
32 /// In general both SymbolA and SymbolB will also have a modifier
33 /// analogous to the top-level Kind. Current targets are not expected
34 /// to make use of both though. The choice comes down to whether
35 /// relocation modifiers apply to the closest symbol or the whole
38 /// Note that this class must remain a simple POD value class, because we need
39 /// it to live in unions etc.
41 const MCSymbolRefExpr *SymA, *SymB;
46 int64_t getConstant() const { return Cst; }
47 const MCSymbolRefExpr *getSymA() const { return SymA; }
48 const MCSymbolRefExpr *getSymB() const { return SymB; }
49 uint32_t getRefKind() const { return RefKind; }
51 /// \brief Is this an absolute (as opposed to relocatable) value.
52 bool isAbsolute() const { return !SymA && !SymB; }
54 /// \brief Print the value to the stream \p OS.
55 void print(raw_ostream &OS) const;
57 /// \brief Print the value to stderr.
60 MCSymbolRefExpr::VariantKind getAccessVariant() const;
62 static MCValue get(const MCSymbolRefExpr *SymA,
63 const MCSymbolRefExpr *SymB = nullptr,
64 int64_t Val = 0, uint32_t RefKind = 0) {
73 static MCValue get(int64_t Val) {
84 } // end namespace llvm