mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
c8a51b01aa
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236368 91177308-0d34-0410-b5e6-96231b3b80d8
92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
//===-- llvm/MC/MCValue.h - MCValue class -----------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the declaration of the MCValue class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_MC_MCVALUE_H
|
|
#define LLVM_MC_MCVALUE_H
|
|
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCSymbol.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
#include <cassert>
|
|
|
|
namespace llvm {
|
|
class MCAsmInfo;
|
|
class raw_ostream;
|
|
|
|
/// \brief This represents an "assembler immediate".
|
|
///
|
|
/// In its most general form, this can hold ":Kind:(SymbolA - SymbolB +
|
|
/// imm64)". Not all targets supports relocations of this general form, but we
|
|
/// need to represent this anyway.
|
|
///
|
|
/// In general both SymbolA and SymbolB will also have a modifier
|
|
/// analogous to the top-level Kind. Current targets are not expected
|
|
/// to make use of both though. The choice comes down to whether
|
|
/// relocation modifiers apply to the closest symbol or the whole
|
|
/// expression.
|
|
///
|
|
/// In the general form, SymbolB can only be defined if SymbolA is, and both
|
|
/// must be in the same (non-external) section. The latter constraint is not
|
|
/// enforced, since a symbol's section may not be known at construction.
|
|
///
|
|
/// Note that this class must remain a simple POD value class, because we need
|
|
/// it to live in unions etc.
|
|
class MCValue {
|
|
const MCSymbolRefExpr *SymA, *SymB;
|
|
int64_t Cst;
|
|
uint32_t RefKind;
|
|
public:
|
|
|
|
int64_t getConstant() const { return Cst; }
|
|
const MCSymbolRefExpr *getSymA() const { return SymA; }
|
|
const MCSymbolRefExpr *getSymB() const { return SymB; }
|
|
uint32_t getRefKind() const { return RefKind; }
|
|
|
|
/// \brief Is this an absolute (as opposed to relocatable) value.
|
|
bool isAbsolute() const { return !SymA && !SymB; }
|
|
|
|
/// \brief Print the value to the stream \p OS.
|
|
void print(raw_ostream &OS) const;
|
|
|
|
/// \brief Print the value to stderr.
|
|
void dump() const;
|
|
|
|
MCSymbolRefExpr::VariantKind getAccessVariant() const;
|
|
|
|
static MCValue get(const MCSymbolRefExpr *SymA,
|
|
const MCSymbolRefExpr *SymB = nullptr,
|
|
int64_t Val = 0, uint32_t RefKind = 0) {
|
|
MCValue R;
|
|
assert((!SymB || SymA) && "Invalid relocatable MCValue!");
|
|
R.Cst = Val;
|
|
R.SymA = SymA;
|
|
R.SymB = SymB;
|
|
R.RefKind = RefKind;
|
|
return R;
|
|
}
|
|
|
|
static MCValue get(int64_t Val) {
|
|
MCValue R;
|
|
R.Cst = Val;
|
|
R.SymA = nullptr;
|
|
R.SymB = nullptr;
|
|
R.RefKind = 0;
|
|
return R;
|
|
}
|
|
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|