#ifndef LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H
#define LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H
-// FIXME: Switch to MC.
-#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/ADT/StringRef.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 MCStreamer;
+ class GlobalValue;
+ class TargetMachine;
class TargetLoweringObjectFile {
-private:
- mutable StringMap<Section> Sections;
+ MCContext *Ctx;
+
+ TargetLoweringObjectFile(const TargetLoweringObjectFile&); // DO NOT IMPLEMENT
+ void operator=(const TargetLoweringObjectFile&); // DO NOT IMPLEMENT
protected:
TargetLoweringObjectFile();
/// TextSection - Section directive for standard text.
///
- const Section *TextSection; // Defaults to ".text".
+ const MCSection *TextSection;
/// DataSection - Section directive for standard data.
///
- const Section *DataSection; // Defaults to ".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;
- // FIXME: SINK THESE.
- const Section *BSSSection_;
+ /// StaticCtorSection - This section contains the static constructor pointer
+ /// list.
+ const MCSection *StaticCtorSection;
- /// ReadOnlySection - This is the directive that is emitted to switch to a
- /// read-only section for constant data (e.g. data declared const,
- /// jump tables).
- const Section *ReadOnlySection; // Defaults to NULL
+ /// 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;
+
+ /// EHFrameSection - If exception handling is supported by the target, this is
+ /// the section the EH Frame is emitted to.
+ const MCSection *EHFrameSection;
+
+ // 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;
+
+ /// SupportsWeakEmptyEHFrame - True if target object file supports a
+ /// weak_definition of constant 0 for an omitted EH frame.
+ bool SupportsWeakOmittedEHFrame;
+
+ /// IsFunctionEHSymbolGlobal - This flag is set to true if the ".eh" symbol
+ /// for a function should be marked .globl.
+ bool IsFunctionEHSymbolGlobal;
+
+ /// 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;
+public:
- /// TLSDataSection - Section directive for Thread Local data.
- ///
- const Section *TLSDataSection; // Defaults to ".tdata".
+ MCContext &getContext() const { return *Ctx; }
- /// TLSBSSSection - Section directive for Thread Local uninitialized data.
- /// Null if this target doesn't support a BSS section.
- ///
- const Section *TLSBSSSection; // Defaults to ".tbss".
+ virtual ~TargetLoweringObjectFile();
- const Section *CStringSection_;
+ /// 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;
+ }
-public:
- // FIXME: NONPUB.
- const Section *getOrCreateSection(const char *Name,
- bool isDirective,
- SectionKind::Kind K) const;
-public:
+ bool isFunctionEHSymbolGlobal() const {
+ return IsFunctionEHSymbolGlobal;
+ }
+ bool isFunctionEHFrameSymbolPrivate() const {
+ return IsFunctionEHFrameSymbolPrivate;
+ }
+ bool getSupportsWeakOmittedEHFrame() const {
+ return SupportsWeakOmittedEHFrame;
+ }
- virtual ~TargetLoweringObjectFile();
+ 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; }
+ const MCSection *getEHFrameSection() const { return EHFrameSection; }
+ 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;
+ }
- const Section *getTextSection() const { return TextSection; }
- const Section *getDataSection() const { return DataSection; }
+ /// 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;
+ }
+ /// getSectionForConstant - Given a constant with the SectionKind, return a
+ /// section that it should be placed in.
+ virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
- /// getSectionForMergeableConstant - Given a mergeable constant with the
- /// specified size and relocation information, return a section that it
- /// should be placed in.
- virtual const Section *
- getSectionForMergeableConstant(SectionKind Kind) const;
+ /// getKindForGlobal - Classify the specified global variable into a set of
+ /// target independent categories embodied in SectionKind.
+ static SectionKind getKindForGlobal(const GlobalValue *GV,
+ const TargetMachine &TM);
- /// getKindForNamedSection - If this target wants to be able to override
- /// section flags based on the name of the section specified for a global
- /// variable, it can implement this. This is used on ELF systems so that
- /// ".tbss" gets the TLS bit set etc.
- virtual SectionKind::Kind getKindForNamedSection(const char *Section,
- SectionKind::Kind K) const{
- return K;
- }
+ /// 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 Section *SectionForGlobal(const GlobalValue *GV,
- const TargetMachine &TM) const;
+ const 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.
- /// FIXME: ELIMINATE this by making PIC16 implement ADDRESS with
- /// getFlagsForNamedSection.
- virtual const Section *
- getSpecialCasedSectionGlobals(const GlobalValue *GV,
+ virtual const MCSection *
+ getSpecialCasedSectionGlobals(const GlobalValue *GV, Mangler *Mang,
SectionKind Kind) const {
return 0;
}
- /// getSectionFlagsAsString - Turn the flags in the specified SectionKind
- /// into a string that can be printed to the assembly file after the
- /// ".section foo" part of a section directive.
- virtual void getSectionFlagsAsString(SectionKind Kind,
- SmallVectorImpl<char> &Str) const {
- }
-
-protected:
- virtual const Section *SelectSectionForGlobal(const GlobalValue *GV,
- SectionKind Kind,
- const TargetMachine &TM) const;
-};
-
-
-
-
-class TargetLoweringObjectFileELF : public TargetLoweringObjectFile {
- bool AtIsCommentChar; // True if @ is the comment character on this target.
-public:
- /// ELF Constructor - AtIsCommentChar is true if the CommentCharacter from TAI
- /// is "@".
- TargetLoweringObjectFileELF(bool AtIsCommentChar = false,
- // FIXME: REMOVE AFTER UNIQUING IS FIXED.
- bool HasCrazyBSS = false);
-
- /// getSectionForMergeableConstant - Given a mergeable constant with the
- /// specified size and relocation information, return a section that it
- /// should be placed in.
- virtual const Section *
- getSectionForMergeableConstant(SectionKind Kind) const;
-
- virtual SectionKind::Kind getKindForNamedSection(const char *Section,
- SectionKind::Kind K) const;
- void getSectionFlagsAsString(SectionKind Kind,
- SmallVectorImpl<char> &Str) const;
-
- virtual const Section* SelectSectionForGlobal(const GlobalValue *GV,
- SectionKind Kind,
- const TargetMachine &TM) const;
-protected:
- const Section *DataRelSection;
- const Section *DataRelLocalSection;
- const Section *DataRelROSection;
- const Section *DataRelROLocalSection;
-
- const Section *MergeableConst4Section;
- const Section *MergeableConst8Section;
- const Section *MergeableConst16Section;
-};
-
-class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
- const Section *TextCoalSection;
- const Section *ConstTextCoalSection;
- const Section *ConstDataCoalSection;
- const Section *ConstDataSection;
- const Section *DataCoalSection;
- const Section *FourByteConstantSection;
- const Section *EightByteConstantSection;
- const Section *SixteenByteConstantSection;
-public:
- TargetLoweringObjectFileMachO();
- virtual const Section *SelectSectionForGlobal(const GlobalValue *GV,
- SectionKind Kind,
- const TargetMachine &TM) const;
-
- virtual const Section *
- getSectionForMergeableConstant(SectionKind Kind) const;
-};
-
+ /// getExprForDwarfGlobalReference - 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;
+ ///
+ const MCExpr *
+ getExprForDwarfReference(const MCSymbol *Sym, Mangler *Mang,
+ MachineModuleInfo *MMI, unsigned Encoding,
+ MCStreamer &Streamer) const;
+
+ virtual unsigned getPersonalityEncoding() const;
+ virtual unsigned getLSDAEncoding() const;
+ virtual unsigned getFDEEncoding() const;
+ virtual unsigned getTTypeEncoding() const;
-class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
-public:
- TargetLoweringObjectFileCOFF();
- virtual void getSectionFlagsAsString(SectionKind Kind,
- SmallVectorImpl<char> &Str) const;
-
- virtual const Section *
+protected:
+ virtual const MCSection *
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- const TargetMachine &TM) const;
+ Mangler *Mang, const TargetMachine &TM) const;
};
} // end namespace llvm
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