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