#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 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.
Binary, ///< Binary expressions.
Constant, ///< Constant expressions.
SymbolRef, ///< References to labels and assigned expressions.
- Unary ///< Unary expressions.
+ Unary, ///< Unary expressions.
+ Target ///< Target specific expression.
};
private:
MCExpr(const MCExpr&); // DO NOT IMPLEMENT
void operator=(const MCExpr&); // DO NOT IMPLEMENT
+ 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) const;
public:
/// @name Accessors
/// @{
/// @name Utility Methods
/// @{
- void print(raw_ostream &OS, const MCAsmInfo *MAI) const;
+ void print(raw_ostream &OS) const;
void dump() const;
/// @}
/// 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(int64_t &Res) const;
+ bool EvaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const;
+ bool EvaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
+ bool EvaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout,
+ const SectionAddrMap &Addrs) 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(MCValue &Res) const;
+ bool EvaluateAsRelocatable(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;
- MCConstantExpr(int64_t _Value)
+ explicit MCConstantExpr(int64_t _Value)
: MCExpr(MCExpr::Constant), Value(_Value) {}
public:
/// assembler variable (defined constant), or constitute an implicit definition
/// of the symbol as external.
class MCSymbolRefExpr : public MCExpr {
+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 relocation
+ // FIXME: We'd really like to use the generic Kinds listed above for these.
+ VK_ARM_PLT, // ARM-style PLT references. i.e., (PLT) instead of @PLT
+ VK_ARM_TLSGD, // ditto for TLSGD, GOT, GOTOFF, TPOFF and GOTTPOFF
+ VK_ARM_GOT,
+ VK_ARM_GOTOFF,
+ VK_ARM_TPOFF,
+ VK_ARM_GOTTPOFF,
+
+ VK_PPC_TOC,
+ VK_PPC_HA16, // ha16(symbol)
+ VK_PPC_LO16 // lo16(symbol)
+ };
+
+private:
+ /// The symbol being referenced.
const MCSymbol *Symbol;
- MCSymbolRefExpr(const MCSymbol *_Symbol)
- : MCExpr(MCExpr::SymbolRef), Symbol(_Symbol) {}
+ /// The symbol reference modifier.
+ const VariantKind Kind;
+
+ explicit MCSymbolRefExpr(const MCSymbol *_Symbol, VariantKind _Kind)
+ : MCExpr(MCExpr::SymbolRef), Symbol(_Symbol), Kind(_Kind) {}
public:
/// @name Construction
/// @{
- static const MCSymbolRefExpr *Create(const MCSymbol *Symbol, MCContext &Ctx);
- static const MCSymbolRefExpr *Create(const StringRef &Name, MCContext &Ctx);
-
-
-
+ 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; }
+ 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) {
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.
};
static bool classof(const MCBinaryExpr *) { return true; }
};
+/// 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 AddValueSymbols(MCAssembler *) const = 0;
+ virtual const MCSection *FindAssociatedSection() const = 0;
+
+ static bool classof(const MCExpr *E) {
+ return E->getKind() == MCExpr::Target;
+ }
+ static bool classof(const MCTargetExpr *) { return true; }
+};
+
} // end namespace llvm
#endif
projects / oota-llvm.git / blobdiff