79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
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//===-- ARMMCExpr.h - ARM specific MC expression classes --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_ARM_MCTARGETDESC_ARMMCEXPR_H
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#define LLVM_LIB_TARGET_ARM_MCTARGETDESC_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 MCAsmInfo *MAI) const override;
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bool evaluateAsRelocatableImpl(MCValue &Res,
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const MCAsmLayout *Layout,
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const MCFixup *Fixup) const override {
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return false;
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}
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void visitUsedExpr(MCStreamer &Streamer) const override;
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MCFragment *findAssociatedFragment() const override {
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return getSubExpr()->findAssociatedFragment();
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}
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// There are no TLS ARMMCExprs at the moment.
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void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
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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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};
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} // end namespace llvm
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#endif
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