mirror of
https://github.com/c64scene-ar/llvm-6502.git
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c7abd27294
Remove the duplicate from MCRecordStreamer. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211714 91177308-0d34-0410-b5e6-96231b3b80d8
541 lines
17 KiB
C++
541 lines
17 KiB
C++
//===- MCExpr.h - Assembly Level Expressions --------------------*- 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_MC_MCEXPR_H
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#define LLVM_MC_MCEXPR_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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class MCAsmInfo;
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class MCAsmLayout;
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class MCAssembler;
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class MCContext;
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class MCSection;
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class MCSectionData;
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class MCStreamer;
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class MCSymbol;
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class MCValue;
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class raw_ostream;
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class StringRef;
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typedef DenseMap<const MCSectionData*, uint64_t> SectionAddrMap;
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/// MCExpr - Base class for the full range of assembler expressions which are
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/// needed for parsing.
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class MCExpr {
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public:
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enum ExprKind {
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Binary, ///< Binary expressions.
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Constant, ///< Constant expressions.
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SymbolRef, ///< References to labels and assigned expressions.
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Unary, ///< Unary expressions.
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Target ///< Target specific expression.
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};
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private:
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ExprKind Kind;
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MCExpr(const MCExpr&) LLVM_DELETED_FUNCTION;
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void operator=(const MCExpr&) LLVM_DELETED_FUNCTION;
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bool EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
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const MCAsmLayout *Layout,
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const SectionAddrMap *Addrs) const;
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protected:
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explicit MCExpr(ExprKind _Kind) : Kind(_Kind) {}
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bool EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
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const MCAsmLayout *Layout,
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const SectionAddrMap *Addrs, bool InSet,
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bool ForceVarExpansion) const;
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public:
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/// @name Accessors
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/// @{
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ExprKind getKind() const { return Kind; }
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/// @}
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/// @name Utility Methods
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/// @{
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void print(raw_ostream &OS) const;
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void dump() const;
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/// @}
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/// @name Expression Evaluation
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/// @{
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/// EvaluateAsAbsolute - Try to evaluate the expression to an absolute value.
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///
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/// @param Res - The absolute value, if evaluation succeeds.
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/// @param Layout - The assembler layout object to use for evaluating symbol
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/// values. If not given, then only non-symbolic expressions will be
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/// evaluated.
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/// @result - True on success.
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bool EvaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout,
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const SectionAddrMap &Addrs) const;
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bool EvaluateAsAbsolute(int64_t &Res) const;
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bool EvaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const;
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bool EvaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
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/// EvaluateAsRelocatable - Try to evaluate the expression to a relocatable
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/// value, i.e. an expression of the fixed form (a - b + constant).
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///
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/// @param Res - The relocatable value, if evaluation succeeds.
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/// @param Layout - The assembler layout object to use for evaluating values.
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/// @result - True on success.
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bool EvaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout) const;
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/// \brief Try to evaluate the expression to the form (a - b + constant) where
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/// neither a nor b are variables.
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///
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/// This is a more aggressive variant of EvaluateAsRelocatable. The intended
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/// use is for when relocations are not available, like the symbol value in
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/// the symbol table.
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bool EvaluateAsValue(MCValue &Res, const MCAsmLayout *Layout) const;
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/// FindAssociatedSection - Find the "associated section" for this expression,
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/// which is currently defined as the absolute section for constants, or
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/// otherwise the section associated with the first defined symbol in the
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/// expression.
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const MCSection *FindAssociatedSection() const;
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/// @}
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};
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inline raw_ostream &operator<<(raw_ostream &OS, const MCExpr &E) {
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E.print(OS);
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return OS;
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}
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//// MCConstantExpr - Represent a constant integer expression.
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class MCConstantExpr : public MCExpr {
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int64_t Value;
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explicit MCConstantExpr(int64_t _Value)
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: MCExpr(MCExpr::Constant), Value(_Value) {}
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public:
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/// @name Construction
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/// @{
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static const MCConstantExpr *Create(int64_t Value, MCContext &Ctx);
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/// @}
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/// @name Accessors
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/// @{
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int64_t getValue() const { return Value; }
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/// @}
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static bool classof(const MCExpr *E) {
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return E->getKind() == MCExpr::Constant;
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}
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};
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/// MCSymbolRefExpr - Represent a reference to a symbol from inside an
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/// expression.
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///
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/// A symbol reference in an expression may be a use of a label, a use of an
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/// assembler variable (defined constant), or constitute an implicit definition
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/// of the symbol as external.
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class MCSymbolRefExpr : public MCExpr {
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public:
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enum VariantKind {
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VK_None,
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VK_Invalid,
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VK_GOT,
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VK_GOTOFF,
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VK_GOTPCREL,
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VK_GOTTPOFF,
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VK_INDNTPOFF,
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VK_NTPOFF,
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VK_GOTNTPOFF,
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VK_PLT,
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VK_TLSGD,
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VK_TLSLD,
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VK_TLSLDM,
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VK_TPOFF,
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VK_DTPOFF,
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VK_TLVP, // Mach-O thread local variable relocations
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VK_TLVPPAGE,
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VK_TLVPPAGEOFF,
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VK_PAGE,
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VK_PAGEOFF,
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VK_GOTPAGE,
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VK_GOTPAGEOFF,
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VK_SECREL,
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VK_WEAKREF, // The link between the symbols in .weakref foo, bar
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VK_ARM_NONE,
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VK_ARM_TARGET1,
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VK_ARM_TARGET2,
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VK_ARM_PREL31,
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VK_ARM_TLSLDO, // symbol(tlsldo)
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VK_ARM_TLSCALL, // symbol(tlscall)
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VK_ARM_TLSDESC, // symbol(tlsdesc)
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VK_ARM_TLSDESCSEQ,
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VK_PPC_LO, // symbol@l
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VK_PPC_HI, // symbol@h
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VK_PPC_HA, // symbol@ha
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VK_PPC_HIGHER, // symbol@higher
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VK_PPC_HIGHERA, // symbol@highera
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VK_PPC_HIGHEST, // symbol@highest
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VK_PPC_HIGHESTA, // symbol@highesta
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VK_PPC_GOT_LO, // symbol@got@l
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VK_PPC_GOT_HI, // symbol@got@h
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VK_PPC_GOT_HA, // symbol@got@ha
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VK_PPC_TOCBASE, // symbol@tocbase
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VK_PPC_TOC, // symbol@toc
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VK_PPC_TOC_LO, // symbol@toc@l
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VK_PPC_TOC_HI, // symbol@toc@h
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VK_PPC_TOC_HA, // symbol@toc@ha
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VK_PPC_DTPMOD, // symbol@dtpmod
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VK_PPC_TPREL, // symbol@tprel
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VK_PPC_TPREL_LO, // symbol@tprel@l
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VK_PPC_TPREL_HI, // symbol@tprel@h
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VK_PPC_TPREL_HA, // symbol@tprel@ha
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VK_PPC_TPREL_HIGHER, // symbol@tprel@higher
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VK_PPC_TPREL_HIGHERA, // symbol@tprel@highera
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VK_PPC_TPREL_HIGHEST, // symbol@tprel@highest
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VK_PPC_TPREL_HIGHESTA, // symbol@tprel@highesta
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VK_PPC_DTPREL, // symbol@dtprel
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VK_PPC_DTPREL_LO, // symbol@dtprel@l
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VK_PPC_DTPREL_HI, // symbol@dtprel@h
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VK_PPC_DTPREL_HA, // symbol@dtprel@ha
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VK_PPC_DTPREL_HIGHER, // symbol@dtprel@higher
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VK_PPC_DTPREL_HIGHERA, // symbol@dtprel@highera
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VK_PPC_DTPREL_HIGHEST, // symbol@dtprel@highest
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VK_PPC_DTPREL_HIGHESTA,// symbol@dtprel@highesta
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VK_PPC_GOT_TPREL, // symbol@got@tprel
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VK_PPC_GOT_TPREL_LO, // symbol@got@tprel@l
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VK_PPC_GOT_TPREL_HI, // symbol@got@tprel@h
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VK_PPC_GOT_TPREL_HA, // symbol@got@tprel@ha
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VK_PPC_GOT_DTPREL, // symbol@got@dtprel
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VK_PPC_GOT_DTPREL_LO, // symbol@got@dtprel@l
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VK_PPC_GOT_DTPREL_HI, // symbol@got@dtprel@h
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VK_PPC_GOT_DTPREL_HA, // symbol@got@dtprel@ha
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VK_PPC_TLS, // symbol@tls
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VK_PPC_GOT_TLSGD, // symbol@got@tlsgd
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VK_PPC_GOT_TLSGD_LO, // symbol@got@tlsgd@l
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VK_PPC_GOT_TLSGD_HI, // symbol@got@tlsgd@h
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VK_PPC_GOT_TLSGD_HA, // symbol@got@tlsgd@ha
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VK_PPC_TLSGD, // symbol@tlsgd
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VK_PPC_GOT_TLSLD, // symbol@got@tlsld
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VK_PPC_GOT_TLSLD_LO, // symbol@got@tlsld@l
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VK_PPC_GOT_TLSLD_HI, // symbol@got@tlsld@h
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VK_PPC_GOT_TLSLD_HA, // symbol@got@tlsld@ha
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VK_PPC_TLSLD, // symbol@tlsld
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VK_Mips_GPREL,
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VK_Mips_GOT_CALL,
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VK_Mips_GOT16,
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VK_Mips_GOT,
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VK_Mips_ABS_HI,
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VK_Mips_ABS_LO,
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VK_Mips_TLSGD,
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VK_Mips_TLSLDM,
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VK_Mips_DTPREL_HI,
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VK_Mips_DTPREL_LO,
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VK_Mips_GOTTPREL,
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VK_Mips_TPREL_HI,
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VK_Mips_TPREL_LO,
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VK_Mips_GPOFF_HI,
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VK_Mips_GPOFF_LO,
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VK_Mips_GOT_DISP,
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VK_Mips_GOT_PAGE,
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VK_Mips_GOT_OFST,
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VK_Mips_HIGHER,
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VK_Mips_HIGHEST,
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VK_Mips_GOT_HI16,
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VK_Mips_GOT_LO16,
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VK_Mips_CALL_HI16,
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VK_Mips_CALL_LO16,
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VK_Mips_PCREL_HI16,
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VK_Mips_PCREL_LO16,
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VK_COFF_IMGREL32 // symbol@imgrel (image-relative)
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};
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private:
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/// The symbol being referenced.
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const MCSymbol *Symbol;
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/// The symbol reference modifier.
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const VariantKind Kind;
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/// MCAsmInfo that is used to print symbol variants correctly.
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const MCAsmInfo *MAI;
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explicit MCSymbolRefExpr(const MCSymbol *_Symbol, VariantKind _Kind,
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const MCAsmInfo *_MAI)
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: MCExpr(MCExpr::SymbolRef), Symbol(_Symbol), Kind(_Kind), MAI(_MAI) {
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assert(Symbol);
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assert(MAI);
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}
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public:
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/// @name Construction
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/// @{
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static const MCSymbolRefExpr *Create(const MCSymbol *Symbol, MCContext &Ctx) {
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return MCSymbolRefExpr::Create(Symbol, VK_None, Ctx);
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}
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static const MCSymbolRefExpr *Create(const MCSymbol *Symbol, VariantKind Kind,
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MCContext &Ctx);
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static const MCSymbolRefExpr *Create(StringRef Name, VariantKind Kind,
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MCContext &Ctx);
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/// @}
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/// @name Accessors
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/// @{
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const MCSymbol &getSymbol() const { return *Symbol; }
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const MCAsmInfo &getMCAsmInfo() const { return *MAI; }
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VariantKind getKind() const { return Kind; }
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/// @}
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/// @name Static Utility Functions
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/// @{
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static StringRef getVariantKindName(VariantKind Kind);
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static VariantKind getVariantKindForName(StringRef Name);
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/// @}
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static bool classof(const MCExpr *E) {
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return E->getKind() == MCExpr::SymbolRef;
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}
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};
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/// MCUnaryExpr - Unary assembler expressions.
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class MCUnaryExpr : public MCExpr {
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public:
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enum Opcode {
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LNot, ///< Logical negation.
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Minus, ///< Unary minus.
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Not, ///< Bitwise negation.
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Plus ///< Unary plus.
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};
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private:
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Opcode Op;
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const MCExpr *Expr;
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MCUnaryExpr(Opcode _Op, const MCExpr *_Expr)
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: MCExpr(MCExpr::Unary), Op(_Op), Expr(_Expr) {}
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public:
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/// @name Construction
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/// @{
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static const MCUnaryExpr *Create(Opcode Op, const MCExpr *Expr,
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MCContext &Ctx);
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static const MCUnaryExpr *CreateLNot(const MCExpr *Expr, MCContext &Ctx) {
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return Create(LNot, Expr, Ctx);
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}
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static const MCUnaryExpr *CreateMinus(const MCExpr *Expr, MCContext &Ctx) {
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return Create(Minus, Expr, Ctx);
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}
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static const MCUnaryExpr *CreateNot(const MCExpr *Expr, MCContext &Ctx) {
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return Create(Not, Expr, Ctx);
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}
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static const MCUnaryExpr *CreatePlus(const MCExpr *Expr, MCContext &Ctx) {
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return Create(Plus, 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 unary expression.
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Opcode getOpcode() const { return Op; }
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/// getSubExpr - Get the child of this unary expression.
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const MCExpr *getSubExpr() const { return Expr; }
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/// @}
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static bool classof(const MCExpr *E) {
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return E->getKind() == MCExpr::Unary;
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}
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};
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/// MCBinaryExpr - Binary assembler expressions.
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class MCBinaryExpr : public MCExpr {
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public:
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enum Opcode {
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Add, ///< Addition.
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And, ///< Bitwise and.
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Div, ///< Signed division.
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EQ, ///< Equality comparison.
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GT, ///< Signed greater than comparison (result is either 0 or some
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///< target-specific non-zero value)
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GTE, ///< Signed greater than or equal comparison (result is either 0 or
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///< some target-specific non-zero value).
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LAnd, ///< Logical and.
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LOr, ///< Logical or.
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LT, ///< Signed less than comparison (result is either 0 or
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///< some target-specific non-zero value).
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LTE, ///< Signed less than or equal comparison (result is either 0 or
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///< some target-specific non-zero value).
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Mod, ///< Signed remainder.
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Mul, ///< Multiplication.
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NE, ///< Inequality comparison.
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Or, ///< Bitwise or.
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Shl, ///< Shift left.
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Shr, ///< Shift right (arithmetic or logical, depending on target)
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Sub, ///< Subtraction.
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Xor ///< Bitwise exclusive or.
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};
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private:
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Opcode Op;
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const MCExpr *LHS, *RHS;
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MCBinaryExpr(Opcode _Op, const MCExpr *_LHS, const MCExpr *_RHS)
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: MCExpr(MCExpr::Binary), Op(_Op), LHS(_LHS), RHS(_RHS) {}
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public:
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/// @name Construction
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/// @{
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static const MCBinaryExpr *Create(Opcode Op, const MCExpr *LHS,
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const MCExpr *RHS, MCContext &Ctx);
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static const MCBinaryExpr *CreateAdd(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(Add, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateAnd(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(And, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateDiv(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(Div, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateEQ(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(EQ, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateGT(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(GT, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateGTE(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(GTE, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateLAnd(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(LAnd, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateLOr(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(LOr, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateLT(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(LT, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateLTE(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(LTE, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateMod(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(Mod, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateMul(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(Mul, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateNE(const MCExpr *LHS, const MCExpr *RHS,
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MCContext &Ctx) {
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return Create(NE, LHS, RHS, Ctx);
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}
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static const MCBinaryExpr *CreateOr(const MCExpr *LHS, const MCExpr *RHS,
|
|
MCContext &Ctx) {
|
|
return Create(Or, LHS, RHS, Ctx);
|
|
}
|
|
static const MCBinaryExpr *CreateShl(const MCExpr *LHS, const MCExpr *RHS,
|
|
MCContext &Ctx) {
|
|
return Create(Shl, LHS, RHS, Ctx);
|
|
}
|
|
static const MCBinaryExpr *CreateShr(const MCExpr *LHS, const MCExpr *RHS,
|
|
MCContext &Ctx) {
|
|
return Create(Shr, LHS, RHS, Ctx);
|
|
}
|
|
static const MCBinaryExpr *CreateSub(const MCExpr *LHS, const MCExpr *RHS,
|
|
MCContext &Ctx) {
|
|
return Create(Sub, LHS, RHS, Ctx);
|
|
}
|
|
static const MCBinaryExpr *CreateXor(const MCExpr *LHS, const MCExpr *RHS,
|
|
MCContext &Ctx) {
|
|
return Create(Xor, LHS, RHS, Ctx);
|
|
}
|
|
|
|
/// @}
|
|
/// @name Accessors
|
|
/// @{
|
|
|
|
/// getOpcode - Get the kind of this binary expression.
|
|
Opcode getOpcode() const { return Op; }
|
|
|
|
/// getLHS - Get the left-hand side expression of the binary operator.
|
|
const MCExpr *getLHS() const { return LHS; }
|
|
|
|
/// getRHS - Get the right-hand side expression of the binary operator.
|
|
const MCExpr *getRHS() const { return RHS; }
|
|
|
|
/// @}
|
|
|
|
static bool classof(const MCExpr *E) {
|
|
return E->getKind() == MCExpr::Binary;
|
|
}
|
|
};
|
|
|
|
/// MCTargetExpr - This is an extension point for target-specific MCExpr
|
|
/// subclasses to implement.
|
|
///
|
|
/// NOTE: All subclasses are required to have trivial destructors because
|
|
/// MCExprs are bump pointer allocated and not destructed.
|
|
class MCTargetExpr : public MCExpr {
|
|
virtual void anchor();
|
|
protected:
|
|
MCTargetExpr() : MCExpr(Target) {}
|
|
virtual ~MCTargetExpr() {}
|
|
public:
|
|
|
|
virtual void PrintImpl(raw_ostream &OS) const = 0;
|
|
virtual bool EvaluateAsRelocatableImpl(MCValue &Res,
|
|
const MCAsmLayout *Layout) const = 0;
|
|
virtual void visitUsedExpr(MCStreamer& Streamer) const = 0;
|
|
virtual const MCSection *FindAssociatedSection() const = 0;
|
|
|
|
virtual void fixELFSymbolsInTLSFixups(MCAssembler &) const = 0;
|
|
|
|
static bool classof(const MCExpr *E) {
|
|
return E->getKind() == MCExpr::Target;
|
|
}
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|