forked from OSchip/llvm-project
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
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//===-- AVRMCExpr.h - AVR specific MC expression classes --------*- C++ -*-===//
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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 LLVM_AVR_MCEXPR_H
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#define LLVM_AVR_MCEXPR_H
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#include "llvm/MC/MCExpr.h"
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#include "MCTargetDesc/AVRFixupKinds.h"
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namespace llvm {
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/// A expression in AVR machine code.
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class AVRMCExpr : public MCTargetExpr {
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public:
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/// Specifies the type of an expression.
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enum VariantKind {
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VK_AVR_None,
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VK_AVR_HI8, ///< Corresponds to `hi8()`.
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VK_AVR_LO8, ///< Corresponds to `lo8()`.
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VK_AVR_HH8, ///< Corresponds to `hlo8() and hh8()`.
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VK_AVR_HHI8, ///< Corresponds to `hhi8()`.
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VK_AVR_PM_LO8, ///< Corresponds to `pm_lo8()`.
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VK_AVR_PM_HI8, ///< Corresponds to `pm_hi8()`.
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VK_AVR_PM_HH8 ///< Corresponds to `pm_hh8()`.
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};
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public:
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/// Creates an AVR machine code expression.
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static const AVRMCExpr *create(VariantKind Kind, const MCExpr *Expr,
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bool isNegated, MCContext &Ctx);
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/// Gets the type of the expression.
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VariantKind getKind() const { return Kind; }
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/// Gets the name of the expression.
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const char *getName() const;
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const MCExpr *getSubExpr() const { return SubExpr; }
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/// Gets the fixup which corresponds to the expression.
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AVR::Fixups getFixupKind() const;
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/// Evaluates the fixup as a constant value.
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bool evaluateAsConstant(int64_t &Result) const;
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bool isNegated() const { return Negated; }
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void setNegated(bool negated = true) { Negated = negated; }
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void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
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bool evaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout,
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const MCFixup *Fixup) const override;
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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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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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public:
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static VariantKind getKindByName(StringRef Name);
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private:
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int64_t evaluateAsInt64(int64_t Value) const;
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const VariantKind Kind;
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const MCExpr *SubExpr;
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bool Negated;
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private:
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explicit AVRMCExpr(VariantKind Kind, const MCExpr *Expr, bool Negated)
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: Kind(Kind), SubExpr(Expr), Negated(Negated) {}
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~AVRMCExpr() {}
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};
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} // end namespace llvm
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#endif // LLVM_AVR_MCEXPR_H
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