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7597212abc
in the right direction. It eliminated some hacks and will unblock codegen work. But it's far from being done. It doesn't reject illegal expressions, e.g. (FOO - :lower16:BAR). It also doesn't work in Thumb2 mode at all. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123369 91177308-0d34-0410-b5e6-96231b3b80d8
74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
//===-- ARMMCExpr.h - ARM specific MC expression classes ------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ARMMCEXPR_H
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#define ARMMCEXPR_H
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#include "llvm/MC/MCExpr.h"
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namespace llvm {
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class ARMMCExpr : public MCTargetExpr {
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public:
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enum VariantKind {
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VK_ARM_None,
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VK_ARM_HI16, // The R_ARM_MOVT_ABS relocation (:upper16: in the .s file)
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VK_ARM_LO16 // The R_ARM_MOVW_ABS_NC relocation (:lower16: in the .s file)
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};
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private:
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const VariantKind Kind;
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const MCExpr *Expr;
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explicit ARMMCExpr(VariantKind _Kind, const MCExpr *_Expr)
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: Kind(_Kind), Expr(_Expr) {}
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public:
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/// @name Construction
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/// @{
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static const ARMMCExpr *Create(VariantKind Kind, const MCExpr *Expr,
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MCContext &Ctx);
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static const ARMMCExpr *CreateUpper16(const MCExpr *Expr, MCContext &Ctx) {
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return Create(VK_ARM_HI16, Expr, Ctx);
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}
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static const ARMMCExpr *CreateLower16(const MCExpr *Expr, MCContext &Ctx) {
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return Create(VK_ARM_LO16, Expr, Ctx);
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}
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/// @}
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/// @name Accessors
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/// @{
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/// getOpcode - Get the kind of this expression.
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VariantKind getKind() const { return Kind; }
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/// getSubExpr - Get the child of this expression.
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const MCExpr *getSubExpr() const { return Expr; }
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/// @}
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void PrintImpl(raw_ostream &OS) const;
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bool EvaluateAsRelocatableImpl(MCValue &Res,
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const MCAsmLayout *Layout) const;
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void AddValueSymbols(MCAssembler *) const;
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static bool classof(const MCExpr *E) {
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return E->getKind() == MCExpr::Target;
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}
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static bool classof(const ARMMCExpr *) { return true; }
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};
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} // end namespace llvm
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#endif
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