X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FMC%2FMCExpr.h;h=486967505505b6da878053b81ec8b312218e2438;hb=7610ba7d241256653b7225245d439646cc1450e5;hp=f85650fc90bf15804c8817b5d2a72576c3880949;hpb=f230df9af4012f9510de664b6d62b128e26a5861;p=oota-llvm.git diff --git a/include/llvm/MC/MCExpr.h b/include/llvm/MC/MCExpr.h index f85650fc90b..48696750550 100644 --- a/include/llvm/MC/MCExpr.h +++ b/include/llvm/MC/MCExpr.h @@ -10,17 +10,24 @@ #ifndef LLVM_MC_MCEXPR_H #define LLVM_MC_MCEXPR_H +#include "llvm/ADT/DenseMap.h" #include "llvm/Support/Casting.h" -#include "llvm/System/DataTypes.h" +#include "llvm/Support/DataTypes.h" namespace llvm { class MCAsmInfo; class MCAsmLayout; +class MCAssembler; class MCContext; +class MCFixup; +class MCSection; +class MCSectionData; +class MCStreamer; class MCSymbol; class MCValue; class raw_ostream; class StringRef; +typedef DenseMap SectionAddrMap; /// MCExpr - Base class for the full range of assembler expressions which are /// needed for parsing. @@ -37,14 +44,26 @@ public: private: ExprKind Kind; - MCExpr(const MCExpr&); // DO NOT IMPLEMENT - void operator=(const MCExpr&); // DO NOT IMPLEMENT + MCExpr(const MCExpr&) = delete; + void operator=(const MCExpr&) = delete; + + bool EvaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm, + const MCAsmLayout *Layout, + const SectionAddrMap *Addrs) const; + + bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm, + const MCAsmLayout *Layout, + const SectionAddrMap *Addrs, bool InSet) const; protected: - explicit MCExpr(ExprKind _Kind) : Kind(_Kind) {} + explicit MCExpr(ExprKind Kind) : Kind(Kind) {} + + bool EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, + const MCAsmLayout *Layout, + const MCFixup *Fixup, + const SectionAddrMap *Addrs, bool InSet, + bool ForceVarExpansion) const; - bool EvaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout, - bool InSet) const; public: /// @name Accessors /// @{ @@ -69,19 +88,40 @@ public: /// values. If not given, then only non-symbolic expressions will be /// evaluated. /// @result - True on success. - bool EvaluateAsAbsolute(int64_t &Res, const MCAsmLayout *Layout = 0) 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; + + int64_t evaluateKnownAbsolute(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. + /// @param Fixup - The Fixup object if available. /// @result - True on success. - bool EvaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout = 0) const; + bool EvaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout, + const MCFixup *Fixup) 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 MCFixup *Fixup) 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) { @@ -93,8 +133,8 @@ inline raw_ostream &operator<<(raw_ostream &OS, const MCExpr &E) { class MCConstantExpr : public MCExpr { int64_t Value; - explicit MCConstantExpr(int64_t _Value) - : MCExpr(MCExpr::Constant), Value(_Value) {} + explicit MCConstantExpr(int64_t Value) + : MCExpr(MCExpr::Constant), Value(Value) {} public: /// @name Construction @@ -113,7 +153,6 @@ public: 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 @@ -134,24 +173,132 @@ public: VK_GOTTPOFF, VK_INDNTPOFF, VK_NTPOFF, + VK_GOTNTPOFF, VK_PLT, VK_TLSGD, + VK_TLSLD, + VK_TLSLDM, VK_TPOFF, - VK_ARM_HI16, // The R_ARM_MOVT_ABS relocation (:upper16: in the asm file) - VK_ARM_LO16, // The R_ARM_MOVW_ABS_NC relocation (:lower16: in the asm file) - VK_ARM_PLT, // ARM-style PLT symbol references. i.e., (PLT) instead of @PLT - VK_TLVP // Mach-O thread local variable relocation + 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_SIZE, // symbol@SIZE + 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_SBREL, // symbol(sbrel) + 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_PPC_LOCAL, // symbol@local + + 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 reference modifier. + const unsigned Kind : 16; + + /// Specifies how the variant kind should be printed. + const unsigned UseParensForSymbolVariant : 1; + + // FIXME: Remove this bit. + const unsigned HasSubsectionsViaSymbols : 1; + /// The symbol being referenced. const MCSymbol *Symbol; - /// The symbol reference modifier. - const VariantKind Kind; - - explicit MCSymbolRefExpr(const MCSymbol *_Symbol, VariantKind _Kind) - : MCExpr(MCExpr::SymbolRef), Symbol(_Symbol), Kind(_Kind) {} + explicit MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind, + const MCAsmInfo *MAI); public: /// @name Construction @@ -165,14 +312,18 @@ public: 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; } + VariantKind getKind() const { return static_cast(Kind); } + + void printVariantKind(raw_ostream &OS) const; + + bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; } /// @} /// @name Static Utility Functions @@ -187,7 +338,6 @@ public: static bool classof(const MCExpr *E) { return E->getKind() == MCExpr::SymbolRef; } - static bool classof(const MCSymbolRefExpr *) { return true; } }; /// MCUnaryExpr - Unary assembler expressions. @@ -204,8 +354,8 @@ private: Opcode Op; const MCExpr *Expr; - MCUnaryExpr(Opcode _Op, const MCExpr *_Expr) - : MCExpr(MCExpr::Unary), Op(_Op), Expr(_Expr) {} + MCUnaryExpr(Opcode Op, const MCExpr *Expr) + : MCExpr(MCExpr::Unary), Op(Op), Expr(Expr) {} public: /// @name Construction @@ -241,7 +391,6 @@ public: static bool classof(const MCExpr *E) { return E->getKind() == MCExpr::Unary; } - static bool classof(const MCUnaryExpr *) { return true; } }; /// MCBinaryExpr - Binary assembler expressions. @@ -276,8 +425,8 @@ private: Opcode Op; const MCExpr *LHS, *RHS; - MCBinaryExpr(Opcode _Op, const MCExpr *_LHS, const MCExpr *_RHS) - : MCExpr(MCExpr::Binary), Op(_Op), LHS(_LHS), RHS(_RHS) {} + MCBinaryExpr(Opcode Op, const MCExpr *LHS, const MCExpr *RHS) + : MCExpr(MCExpr::Binary), Op(Op), LHS(LHS), RHS(RHS) {} public: /// @name Construction @@ -376,7 +525,6 @@ public: static bool classof(const MCExpr *E) { return E->getKind() == MCExpr::Binary; } - static bool classof(const MCBinaryExpr *) { return true; } }; /// MCTargetExpr - This is an extension point for target-specific MCExpr @@ -385,7 +533,7 @@ public: /// 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(); + virtual void anchor(); protected: MCTargetExpr() : MCExpr(Target) {} virtual ~MCTargetExpr() {} @@ -393,13 +541,16 @@ public: virtual void PrintImpl(raw_ostream &OS) const = 0; virtual bool EvaluateAsRelocatableImpl(MCValue &Res, - const MCAsmLayout *Layout) const = 0; + const MCAsmLayout *Layout, + const MCFixup *Fixup) 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; } - static bool classof(const MCTargetExpr *) { return true; } }; } // end namespace llvm