#ifndef LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H
#define LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H
-#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/SectionKind.h"
namespace llvm {
class MachineModuleInfo;
class Mangler;
- class MCAsmInfo;
class MCContext;
class MCExpr;
class MCSection;
- class MCSectionMachO;
class MCSymbol;
+ class MCSymbolRefExpr;
class MCStreamer;
+ class MCValue;
+ class ConstantExpr;
class GlobalValue;
class TargetMachine;
-
-class TargetLoweringObjectFile {
+
+class TargetLoweringObjectFile : public MCObjectFileInfo {
MCContext *Ctx;
-
- TargetLoweringObjectFile(const TargetLoweringObjectFile&); // DO NOT IMPLEMENT
- void operator=(const TargetLoweringObjectFile&); // DO NOT IMPLEMENT
+
+ TargetLoweringObjectFile(
+ const TargetLoweringObjectFile&) = delete;
+ void operator=(const TargetLoweringObjectFile&) = delete;
+
protected:
-
- TargetLoweringObjectFile();
-
- /// TextSection - Section directive for standard text.
- ///
- const MCSection *TextSection;
-
- /// DataSection - Section directive for standard data.
- ///
- const MCSection *DataSection;
-
- /// BSSSection - Section that is default initialized to zero.
- const MCSection *BSSSection;
-
- /// ReadOnlySection - Section that is readonly and can contain arbitrary
- /// initialized data. Targets are not required to have a readonly section.
- /// If they don't, various bits of code will fall back to using the data
- /// section for constants.
- const MCSection *ReadOnlySection;
-
- /// StaticCtorSection - This section contains the static constructor pointer
- /// list.
- const MCSection *StaticCtorSection;
-
- /// StaticDtorSection - This section contains the static destructor pointer
- /// list.
- const MCSection *StaticDtorSection;
-
- /// LSDASection - If exception handling is supported by the target, this is
- /// the section the Language Specific Data Area information is emitted to.
- const MCSection *LSDASection;
-
- // Dwarf sections for debug info. If a target supports debug info, these must
- // be set.
- const MCSection *DwarfAbbrevSection;
- const MCSection *DwarfInfoSection;
- const MCSection *DwarfLineSection;
- const MCSection *DwarfFrameSection;
- const MCSection *DwarfPubNamesSection;
- const MCSection *DwarfPubTypesSection;
- const MCSection *DwarfDebugInlineSection;
- const MCSection *DwarfStrSection;
- const MCSection *DwarfLocSection;
- const MCSection *DwarfARangesSection;
- const MCSection *DwarfRangesSection;
- const MCSection *DwarfMacroInfoSection;
-
- // Extra TLS Variable Data section. If the target needs to put additional
- // information for a TLS variable, it'll go here.
- const MCSection *TLSExtraDataSection;
-
- /// CommDirectiveSupportsAlignment - True if .comm supports alignment. This
- /// is a hack for as long as we support 10.4 Tiger, whose assembler doesn't
- /// support alignment on comm.
- bool CommDirectiveSupportsAlignment;
-
- /// SupportsWeakEmptyEHFrame - True if target object file supports a
- /// weak_definition of constant 0 for an omitted EH frame.
- bool SupportsWeakOmittedEHFrame;
-
- /// IsFunctionEHFrameSymbolPrivate - This flag is set to true if the
- /// "EH_frame" symbol for EH information should be an assembler temporary (aka
- /// private linkage, aka an L or .L label) or false if it should be a normal
- /// non-.globl label. This defaults to true.
- bool IsFunctionEHFrameSymbolPrivate;
+ const DataLayout *DL;
+ bool SupportIndirectSymViaGOTPCRel;
+ bool SupportGOTPCRelWithOffset;
+
public:
-
MCContext &getContext() const { return *Ctx; }
-
+
+ TargetLoweringObjectFile() : MCObjectFileInfo(), Ctx(nullptr), DL(nullptr),
+ SupportIndirectSymViaGOTPCRel(false),
+ SupportGOTPCRelWithOffset(true) {}
+
virtual ~TargetLoweringObjectFile();
-
- /// Initialize - this method must be called before any actual lowering is
- /// done. This specifies the current context for codegen, and gives the
- /// lowering implementations a chance to set up their default sections.
- virtual void Initialize(MCContext &ctx, const TargetMachine &TM) {
- Ctx = &ctx;
- }
-
- bool isFunctionEHFrameSymbolPrivate() const {
- return IsFunctionEHFrameSymbolPrivate;
- }
- bool getSupportsWeakOmittedEHFrame() const {
- return SupportsWeakOmittedEHFrame;
- }
-
- bool getCommDirectiveSupportsAlignment() const {
- return CommDirectiveSupportsAlignment;
- }
- const MCSection *getTextSection() const { return TextSection; }
- const MCSection *getDataSection() const { return DataSection; }
- const MCSection *getBSSSection() const { return BSSSection; }
- const MCSection *getStaticCtorSection() const { return StaticCtorSection; }
- const MCSection *getStaticDtorSection() const { return StaticDtorSection; }
- const MCSection *getLSDASection() const { return LSDASection; }
- virtual const MCSection *getEHFrameSection() const = 0;
+ /// This method must be called before any actual lowering is done. This
+ /// specifies the current context for codegen, and gives the lowering
+ /// implementations a chance to set up their default sections.
+ virtual void Initialize(MCContext &ctx, const TargetMachine &TM);
+
virtual void emitPersonalityValue(MCStreamer &Streamer,
const TargetMachine &TM,
const MCSymbol *Sym) const;
- const MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; }
- const MCSection *getDwarfInfoSection() const { return DwarfInfoSection; }
- const MCSection *getDwarfLineSection() const { return DwarfLineSection; }
- const MCSection *getDwarfFrameSection() const { return DwarfFrameSection; }
- const MCSection *getDwarfPubNamesSection() const{return DwarfPubNamesSection;}
- const MCSection *getDwarfPubTypesSection() const{return DwarfPubTypesSection;}
- const MCSection *getDwarfDebugInlineSection() const {
- return DwarfDebugInlineSection;
- }
- const MCSection *getDwarfStrSection() const { return DwarfStrSection; }
- const MCSection *getDwarfLocSection() const { return DwarfLocSection; }
- const MCSection *getDwarfARangesSection() const { return DwarfARangesSection;}
- const MCSection *getDwarfRangesSection() const { return DwarfRangesSection; }
- const MCSection *getDwarfMacroInfoSection() const {
- return DwarfMacroInfoSection;
- }
- const MCSection *getTLSExtraDataSection() const {
- return TLSExtraDataSection;
- }
- virtual const MCSection *getWin64EHFuncTableSection(StringRef suffix)const=0;
- virtual const MCSection *getWin64EHTableSection(StringRef suffix) const = 0;
-
- /// shouldEmitUsedDirectiveFor - This hook allows targets to selectively
- /// decide not to emit the UsedDirective for some symbols in llvm.used.
- /// FIXME: REMOVE this (rdar://7071300)
- virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV,
- Mangler *) const {
- return GV != 0;
+
+ /// Extract the dependent library name from a linker option string. Returns
+ /// StringRef() if the option does not specify a library.
+ virtual StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const {
+ return StringRef();
}
-
- /// getSectionForConstant - Given a constant with the SectionKind, return a
- /// section that it should be placed in.
- virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
-
- /// getKindForGlobal - Classify the specified global variable into a set of
- /// target independent categories embodied in SectionKind.
+
+ /// Emit the module flags that the platform cares about.
+ virtual void emitModuleFlags(MCStreamer &Streamer,
+ ArrayRef<Module::ModuleFlagEntry> Flags,
+ Mangler &Mang, const TargetMachine &TM) const {}
+
+ /// Given a constant with the SectionKind, return a section that it should be
+ /// placed in.
+ virtual MCSection *getSectionForConstant(SectionKind Kind,
+ const Constant *C) const;
+
+ /// Classify the specified global variable into a set of target independent
+ /// categories embodied in SectionKind.
static SectionKind getKindForGlobal(const GlobalValue *GV,
const TargetMachine &TM);
-
- /// SectionForGlobal - This method computes the appropriate section to emit
- /// the specified global variable or function definition. This should not
- /// be passed external (or available externally) globals.
- const MCSection *SectionForGlobal(const GlobalValue *GV,
- SectionKind Kind, Mangler *Mang,
- const TargetMachine &TM) const;
-
- /// SectionForGlobal - This method computes the appropriate section to emit
- /// the specified global variable or function definition. This should not
- /// be passed external (or available externally) globals.
- const MCSection *SectionForGlobal(const GlobalValue *GV,
- Mangler *Mang,
- const TargetMachine &TM) const {
+
+ /// This method computes the appropriate section to emit the specified global
+ /// variable or function definition. This should not be passed external (or
+ /// available externally) globals.
+ MCSection *SectionForGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler &Mang, const TargetMachine &TM) const;
+
+ /// This method computes the appropriate section to emit the specified global
+ /// variable or function definition. This should not be passed external (or
+ /// available externally) globals.
+ MCSection *SectionForGlobal(const GlobalValue *GV, Mangler &Mang,
+ const TargetMachine &TM) const {
return SectionForGlobal(GV, getKindForGlobal(GV, TM), Mang, TM);
}
-
-
-
- /// getExplicitSectionGlobal - Targets should implement this method to assign
- /// a section to globals with an explicit section specfied. The
- /// implementation of this method can assume that GV->hasSection() is true.
- virtual const MCSection *
- getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const = 0;
-
- /// getSpecialCasedSectionGlobals - Allow the target to completely override
- /// section assignment of a global.
- virtual const MCSection *
- getSpecialCasedSectionGlobals(const GlobalValue *GV, Mangler *Mang,
- SectionKind Kind) const {
- return 0;
+
+ virtual void getNameWithPrefix(SmallVectorImpl<char> &OutName,
+ const GlobalValue *GV,
+ bool CannotUsePrivateLabel, Mangler &Mang,
+ const TargetMachine &TM) const;
+
+ virtual MCSection *getSectionForJumpTable(const Function &F, Mangler &Mang,
+ const TargetMachine &TM) const;
+
+ virtual bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference,
+ const Function &F) const;
+
+ /// Targets should implement this method to assign a section to globals with
+ /// an explicit section specfied. The implementation of this method can
+ /// assume that GV->hasSection() is true.
+ virtual MCSection *
+ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
+ Mangler &Mang, const TargetMachine &TM) const = 0;
+
+ /// Allow the target to completely override section assignment of a global.
+ virtual const MCSection *getSpecialCasedSectionGlobals(const GlobalValue *GV,
+ SectionKind Kind,
+ Mangler &Mang) const {
+ return nullptr;
}
-
- /// getExprForDwarfGlobalReference - Return an MCExpr to use for a reference
- /// to the specified global variable from exception handling information.
- ///
+
+ /// Return an MCExpr to use for a reference to the specified global variable
+ /// from exception handling information.
virtual const MCExpr *
- getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
- MachineModuleInfo *MMI, unsigned Encoding,
- MCStreamer &Streamer) const;
+ getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding,
+ Mangler &Mang, const TargetMachine &TM,
+ MachineModuleInfo *MMI, MCStreamer &Streamer) const;
- // getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality.
- virtual MCSymbol *
- getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
- MachineModuleInfo *MMI) const;
+ /// Return the MCSymbol for a private symbol with global value name as its
+ /// base, with the specified suffix.
+ MCSymbol *getSymbolWithGlobalValueBase(const GlobalValue *GV,
+ StringRef Suffix, Mangler &Mang,
+ const TargetMachine &TM) const;
+
+ // The symbol that gets passed to .cfi_personality.
+ virtual MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV,
+ Mangler &Mang,
+ const TargetMachine &TM,
+ MachineModuleInfo *MMI) const;
- ///
const MCExpr *
- getExprForDwarfReference(const MCSymbol *Sym, unsigned Encoding,
- MCStreamer &Streamer) const;
-
- virtual unsigned getPersonalityEncoding() const;
- virtual unsigned getLSDAEncoding() const;
- virtual unsigned getFDEEncoding(bool CFI) const;
- virtual unsigned getTTypeEncoding() const;
+ getTTypeReference(const MCSymbolRefExpr *Sym, unsigned Encoding,
+ MCStreamer &Streamer) const;
+
+ virtual MCSection *getStaticCtorSection(unsigned Priority,
+ const MCSymbol *KeySym) const {
+ return StaticCtorSection;
+ }
+
+ virtual MCSection *getStaticDtorSection(unsigned Priority,
+ const MCSymbol *KeySym) const {
+ return StaticDtorSection;
+ }
+
+ /// \brief Create a symbol reference to describe the given TLS variable when
+ /// emitting the address in debug info.
+ virtual const MCExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const;
+
+ virtual const MCExpr *
+ getExecutableRelativeSymbol(const ConstantExpr *CE, Mangler &Mang,
+ const TargetMachine &TM) const {
+ return nullptr;
+ }
+
+ /// \brief Target supports replacing a data "PC"-relative access to a symbol
+ /// through another symbol, by accessing the later via a GOT entry instead?
+ bool supportIndirectSymViaGOTPCRel() const {
+ return SupportIndirectSymViaGOTPCRel;
+ }
+
+ /// \brief Target GOT "PC"-relative relocation supports encoding an additional
+ /// binary expression with an offset?
+ bool supportGOTPCRelWithOffset() const {
+ return SupportGOTPCRelWithOffset;
+ }
+
+ /// \brief Get the target specific PC relative GOT entry relocation
+ virtual const MCExpr *getIndirectSymViaGOTPCRel(const MCSymbol *Sym,
+ const MCValue &MV,
+ int64_t Offset,
+ MachineModuleInfo *MMI,
+ MCStreamer &Streamer) const {
+ return nullptr;
+ }
protected:
- virtual const MCSection *
- SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const;
+ virtual MCSection *SelectSectionForGlobal(const GlobalValue *GV,
+ SectionKind Kind, Mangler &Mang,
+ const TargetMachine &TM) const = 0;
};
} // end namespace llvm
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