| //===-- ARMMCExpr.h - ARM specific MC expression classes --------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_ARM_MCTARGETDESC_ARMMCEXPR_H |
| #define LLVM_LIB_TARGET_ARM_MCTARGETDESC_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 MCAsmInfo *MAI) const override; |
| bool evaluateAsRelocatableImpl(MCValue &Res, |
| const MCAsmLayout *Layout, |
| const MCFixup *Fixup) const override { |
| return false; |
| } |
| void visitUsedExpr(MCStreamer &Streamer) const override; |
| MCFragment *findAssociatedFragment() const override { |
| return getSubExpr()->findAssociatedFragment(); |
| } |
| |
| // 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 |