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//===-- ARMMCExpr.h - ARM specific MC expression classes --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef ARMMCEXPR_H
#define ARMMCEXPR_H
#include "llvm/MC/MCExpr.h"
namespace llvm {
class ARMMCExpr : public MCTargetExpr {
public:
enum VariantKind {
VK_ARM_None,
VK_ARM_HI16, // The R_ARM_MOVT_ABS relocation (:upper16: in the .s file)
VK_ARM_LO16 // The R_ARM_MOVW_ABS_NC relocation (:lower16: in the .s file)
};
private:
const VariantKind Kind;
const MCExpr *Expr;
explicit ARMMCExpr(VariantKind _Kind, const MCExpr *_Expr)
: Kind(_Kind), Expr(_Expr) {}
public:
/// @name Construction
/// @{
static const ARMMCExpr *Create(VariantKind Kind, const MCExpr *Expr,
MCContext &Ctx);
static const ARMMCExpr *CreateUpper16(const MCExpr *Expr, MCContext &Ctx) {
return Create(VK_ARM_HI16, Expr, Ctx);
}
static const ARMMCExpr *CreateLower16(const MCExpr *Expr, MCContext &Ctx) {
return Create(VK_ARM_LO16, Expr, Ctx);
}
/// @}
/// @name Accessors
/// @{
/// getOpcode - Get the kind of this expression.
VariantKind getKind() const { return Kind; }
/// getSubExpr - Get the child of this expression.
const MCExpr *getSubExpr() const { return Expr; }
/// @}
void PrintImpl(raw_ostream &OS) const override;
bool EvaluateAsRelocatableImpl(MCValue &Res,
const MCAsmLayout *Layout) const override;
void AddValueSymbols(MCAssembler *) const override;
const MCSection *FindAssociatedSection() const override {
return getSubExpr()->FindAssociatedSection();
}
// There are no TLS ARMMCExprs at the moment.
void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
static bool classof(const MCExpr *E) {
return E->getKind() == MCExpr::Target;
}
};
} // end namespace llvm
#endif
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