X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FMC%2FMCExpr.h;h=c017fef8b5a59f54c164d49daa202001299721fa;hb=71706a01b0cd04378575f953b49b1289c3e8de9a;hp=e5c4837a7799bd5b01dfd384cbf06c56a1a5f938;hpb=cab0a1933875935c717136d251e2af9749533ba8;p=oota-llvm.git diff --git a/include/llvm/MC/MCExpr.h b/include/llvm/MC/MCExpr.h index e5c4837a779..c017fef8b5a 100644 --- a/include/llvm/MC/MCExpr.h +++ b/include/llvm/MC/MCExpr.h @@ -15,11 +15,14 @@ #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; @@ -41,19 +44,26 @@ public: private: ExprKind Kind; - MCExpr(const MCExpr&) LLVM_DELETED_FUNCTION; - void operator=(const MCExpr&) LLVM_DELETED_FUNCTION; + 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) {} bool EvaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, const MCAsmLayout *Layout, - const SectionAddrMap *Addrs, - bool InSet) const; + const MCFixup *Fixup, + const SectionAddrMap *Addrs, bool InSet, + bool ForceVarExpansion) const; + public: /// @name Accessors /// @{ @@ -84,13 +94,26 @@ public: 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) 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 @@ -157,19 +180,26 @@ public: VK_TLSLDM, VK_TPOFF, VK_DTPOFF, - VK_TLVP, // Mach-O thread local variable relocation + VK_TLVP, // Mach-O thread local variable relocations + VK_TLVPPAGE, + VK_TLVPPAGEOFF, + VK_PAGE, + VK_PAGEOFF, + VK_GOTPAGE, + VK_GOTPAGEOFF, VK_SECREL, - // FIXME: We'd really like to use the generic Kinds listed above for these. + VK_SIZE, // symbol@SIZE + VK_WEAKREF, // The link between the symbols in .weakref foo, bar + VK_ARM_NONE, - 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_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 @@ -178,11 +208,15 @@ public: 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 @@ -218,6 +252,7 @@ public: 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, @@ -243,21 +278,27 @@ public: 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) { - assert(Symbol); - } + explicit MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind, + const MCAsmInfo *MAI); public: /// @name Construction @@ -278,7 +319,11 @@ public: 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 @@ -496,8 +541,9 @@ 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; + 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;