#define LLVM_MC_MCCONTEXT_H
#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/SectionKind.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/raw_ostream.h"
#include <map>
+#include <tuple>
#include <vector> // FIXME: Shouldn't be needed.
namespace llvm {
class MCRegisterInfo;
class MCLineSection;
class SMLoc;
- class StringRef;
- class Twine;
class MCSectionMachO;
class MCSectionELF;
class MCSectionCOFF;
- /// MCContext - Context object for machine code objects. This class owns all
- /// of the sections that it creates.
+ /// Context object for machine code objects. This class owns all of the
+ /// sections that it creates.
///
class MCContext {
- MCContext(const MCContext&) LLVM_DELETED_FUNCTION;
- MCContext &operator=(const MCContext&) LLVM_DELETED_FUNCTION;
+ MCContext(const MCContext&) = delete;
+ MCContext &operator=(const MCContext&) = delete;
public:
typedef StringMap<MCSymbol*, BumpPtrAllocator&> SymbolTable;
private:
/// The MCObjectFileInfo for this target.
const MCObjectFileInfo *MOFI;
- /// Allocator - Allocator object used for creating machine code objects.
+ /// Allocator object used for creating machine code objects.
///
/// We use a bump pointer allocator to avoid the need to track all allocated
/// objects.
BumpPtrAllocator Allocator;
- /// Symbols - Bindings of names to symbols.
+ /// Bindings of names to symbols.
SymbolTable Symbols;
+ /// ELF sections can have a corresponding symbol. This maps one to the
+ /// other.
+ DenseMap<const MCSectionELF*, MCSymbol*> SectionSymbols;
+
/// A maping from a local label number and an instance count to a symbol.
/// For example, in the assembly
/// 1:
/// We have three labels represented by the pairs (1, 0), (2, 0) and (1, 1)
DenseMap<std::pair<unsigned, unsigned>, MCSymbol*> LocalSymbols;
- /// UsedNames - Keeps tracks of names that were used both for used declared
- /// and artificial symbols.
+ /// Keeps tracks of names that were used both for used declared and
+ /// artificial symbols.
StringMap<bool, BumpPtrAllocator&> UsedNames;
- /// NextUniqueID - The next ID to dole out to an unnamed assembler temporary
- /// symbol.
- unsigned NextUniqueID;
+ /// The next ID to dole out to an unnamed assembler temporary symbol with
+ /// a given prefix.
+ StringMap<unsigned> NextID;
/// Instances of directional local labels.
DenseMap<unsigned, MCLabel *> Instances;
/// assembly source files.
unsigned GenDwarfFileNumber;
- /// The default initial text section that we generate dwarf debugging line
- /// info for when generating dwarf assembly source files.
- const MCSection *GenDwarfSection;
- /// Symbols created for the start and end of this section.
- MCSymbol *GenDwarfSectionStartSym, *GenDwarfSectionEndSym;
+ /// Symbols created for the start and end of each section, used for
+ /// generating the .debug_ranges and .debug_aranges sections.
+ MapVector<const MCSection *, std::pair<MCSymbol *, MCSymbol *> >
+ SectionStartEndSyms;
/// The information gathered from labels that will have dwarf label
/// entries when generating dwarf assembly source files.
- std::vector<const MCGenDwarfLabelEntry *> MCGenDwarfLabelEntries;
+ std::vector<MCGenDwarfLabelEntry> MCGenDwarfLabelEntries;
/// The string to embed in the debug information for the compile unit, if
/// non-empty.
/// non-empty.
StringRef DwarfDebugProducer;
+ /// The maximum version of dwarf that we should emit.
+ uint16_t DwarfVersion;
+
/// Honor temporary labels, this is useful for debugging semantic
/// differences between temporary and non-temporary labels (primarily on
/// Darwin).
/// The Compile Unit ID that we are currently processing.
unsigned DwarfCompileUnitID;
- void *MachOUniquingMap, *ELFUniquingMap, *COFFUniquingMap;
+ struct ELFSectionKey {
+ std::string SectionName;
+ StringRef GroupName;
+ unsigned UniqueID;
+ ELFSectionKey(StringRef SectionName, StringRef GroupName,
+ unsigned UniqueID)
+ : SectionName(SectionName), GroupName(GroupName), UniqueID(UniqueID) {
+ }
+ bool operator<(const ELFSectionKey &Other) const {
+ if (SectionName != Other.SectionName)
+ return SectionName < Other.SectionName;
+ if (GroupName != Other.GroupName)
+ return GroupName < Other.GroupName;
+ return UniqueID < Other.UniqueID;
+ }
+ };
+
+ struct COFFSectionKey {
+ std::string SectionName;
+ StringRef GroupName;
+ int SelectionKey;
+ COFFSectionKey(StringRef SectionName, StringRef GroupName,
+ int SelectionKey)
+ : SectionName(SectionName), GroupName(GroupName),
+ SelectionKey(SelectionKey) {}
+ bool operator<(const COFFSectionKey &Other) const {
+ if (SectionName != Other.SectionName)
+ return SectionName < Other.SectionName;
+ if (GroupName != Other.GroupName)
+ return GroupName < Other.GroupName;
+ return SelectionKey < Other.SelectionKey;
+ }
+ };
+
+ StringMap<const MCSectionMachO*> MachOUniquingMap;
+ std::map<ELFSectionKey, const MCSectionELF *> ELFUniquingMap;
+ std::map<COFFSectionKey, const MCSectionCOFF *> COFFUniquingMap;
+ StringMap<bool> ELFRelSecNames;
/// Do automatic reset in destructor
bool AutoReset;
- MCSymbol *CreateSymbol(StringRef Name);
+ MCSymbol *CreateSymbol(StringRef Name, bool AlwaysAddSuffix);
MCSymbol *getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal,
unsigned Instance);
public:
explicit MCContext(const MCAsmInfo *MAI, const MCRegisterInfo *MRI,
- const MCObjectFileInfo *MOFI, const SourceMgr *Mgr = 0,
- bool DoAutoReset = true);
+ const MCObjectFileInfo *MOFI,
+ const SourceMgr *Mgr = nullptr, bool DoAutoReset = true);
~MCContext();
const SourceMgr *getSourceManager() const { return SrcMgr; }
/// @name Symbol Management
/// @{
- /// CreateLinkerPrivateTempSymbol - Create and return a new linker temporary
- /// symbol with a unique but unspecified name.
+ /// Create and return a new linker temporary symbol with a unique but
+ /// unspecified name.
MCSymbol *CreateLinkerPrivateTempSymbol();
- /// CreateTempSymbol - Create and return a new assembler temporary symbol
- /// with a unique but unspecified name.
+ /// Create and return a new assembler temporary symbol with a unique but
+ /// unspecified name.
MCSymbol *CreateTempSymbol();
- /// getUniqueSymbolID() - Return a unique identifier for use in constructing
- /// symbol names.
- unsigned getUniqueSymbolID() { return NextUniqueID++; }
+ MCSymbol *createTempSymbol(const Twine &Name, bool AlwaysAddSuffix);
/// Create the definition of a directional local symbol for numbered label
/// (used for "1:" definitions).
/// for "1b" or 1f" references).
MCSymbol *GetDirectionalLocalSymbol(unsigned LocalLabelVal, bool Before);
- /// GetOrCreateSymbol - Lookup the symbol inside with the specified
- /// @p Name. If it exists, return it. If not, create a forward
- /// reference and return it.
+ /// Lookup the symbol inside with the specified @p Name. If it exists,
+ /// return it. If not, create a forward reference and return it.
///
/// @param Name - The symbol name, which must be unique across all symbols.
- MCSymbol *GetOrCreateSymbol(StringRef Name);
MCSymbol *GetOrCreateSymbol(const Twine &Name);
- /// LookupSymbol - Get the symbol for \p Name, or null.
- MCSymbol *LookupSymbol(StringRef Name) const;
+ MCSymbol *getOrCreateSectionSymbol(const MCSectionELF &Section);
+
+ /// Gets a symbol that will be defined to the final stack offset of a local
+ /// variable after codegen.
+ ///
+ /// @param Idx - The index of a local variable passed to @llvm.frameescape.
+ MCSymbol *getOrCreateFrameAllocSymbol(StringRef FuncName, unsigned Idx);
+
+ MCSymbol *getOrCreateParentFrameOffsetSymbol(StringRef FuncName);
+
+ /// Get the symbol for \p Name, or null.
MCSymbol *LookupSymbol(const Twine &Name) const;
/// getSymbols - Get a reference for the symbol table for clients that
/// @name Section Management
/// @{
- /// getMachOSection - Return the MCSection for the specified mach-o section.
- /// This requires the operands to be valid.
- const MCSectionMachO *getMachOSection(StringRef Segment,
- StringRef Section,
+ /// Return the MCSection for the specified mach-o section. This requires
+ /// the operands to be valid.
+ const MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section,
unsigned TypeAndAttributes,
- unsigned Reserved2,
- SectionKind K);
- const MCSectionMachO *getMachOSection(StringRef Segment,
- StringRef Section,
+ unsigned Reserved2, SectionKind K,
+ const char *BeginSymName = nullptr);
+
+ const MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section,
unsigned TypeAndAttributes,
- SectionKind K) {
- return getMachOSection(Segment, Section, TypeAndAttributes, 0, K);
+ SectionKind K,
+ const char *BeginSymName = nullptr) {
+ return getMachOSection(Segment, Section, TypeAndAttributes, 0, K,
+ BeginSymName);
+ }
+
+ const MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags) {
+ return getELFSection(Section, Type, Flags, nullptr);
+ }
+
+ const MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags,
+ const char *BeginSymName) {
+ return getELFSection(Section, Type, Flags, 0, "", BeginSymName);
}
const MCSectionELF *getELFSection(StringRef Section, unsigned Type,
- unsigned Flags, SectionKind Kind);
+ unsigned Flags, unsigned EntrySize,
+ StringRef Group) {
+ return getELFSection(Section, Type, Flags, EntrySize, Group, nullptr);
+ }
+
+ const MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ StringRef Group,
+ const char *BeginSymName) {
+ return getELFSection(Section, Type, Flags, EntrySize, Group, ~0,
+ BeginSymName);
+ }
+
+ const MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ StringRef Group, unsigned UniqueID) {
+ return getELFSection(Section, Type, Flags, EntrySize, Group, UniqueID,
+ nullptr);
+ }
const MCSectionELF *getELFSection(StringRef Section, unsigned Type,
- unsigned Flags, SectionKind Kind,
- unsigned EntrySize, StringRef Group);
+ unsigned Flags, unsigned EntrySize,
+ StringRef Group, unsigned UniqueID,
+ const char *BeginSymName);
+
+ const MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ const MCSymbol *Group, unsigned UniqueID,
+ const char *BeginSymName,
+ const MCSectionELF *Associated);
+
+ const MCSectionELF *createELFRelSection(StringRef Name, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ const MCSymbol *Group,
+ const MCSectionELF *Associated);
void renameELFSection(const MCSectionELF *Section, StringRef Name);
- const MCSectionELF *CreateELFGroupSection();
+ const MCSectionELF *createELFGroupSection(const MCSymbol *Group);
const MCSectionCOFF *getCOFFSection(StringRef Section,
unsigned Characteristics,
SectionKind Kind,
- StringRef COMDATSymName,
- int Selection,
- const MCSectionCOFF *Assoc = 0);
+ StringRef COMDATSymName, int Selection,
+ const char *BeginSymName = nullptr);
const MCSectionCOFF *getCOFFSection(StringRef Section,
unsigned Characteristics,
- SectionKind Kind);
+ SectionKind Kind,
+ const char *BeginSymName = nullptr);
const MCSectionCOFF *getCOFFSection(StringRef Section);
+ /// Gets or creates a section equivalent to Sec that is associated with the
+ /// section containing KeySym. For example, to create a debug info section
+ /// associated with an inline function, pass the normal debug info section
+ /// as Sec and the function symbol as KeySym.
+ const MCSectionCOFF *getAssociativeCOFFSection(const MCSectionCOFF *Sec,
+ const MCSymbol *KeySym);
+
/// @}
/// @name Dwarf Management
/// \brief Set the main file name and override the default.
void setMainFileName(StringRef S) { MainFileName = S; }
- /// GetDwarfFile - creates an entry in the dwarf file and directory tables.
+ /// Creates an entry in the dwarf file and directory tables.
unsigned GetDwarfFile(StringRef Directory, StringRef FileName,
unsigned FileNumber, unsigned CUID);
getMCDwarfLineTable(CUID).setCompilationDir(CompilationDir);
}
- /// setCurrentDwarfLoc - saves the information from the currently parsed
- /// dwarf .loc directive and sets DwarfLocSeen. When the next instruction
- /// is assembled an entry in the line number table with this information and
- /// the address of the instruction will be created.
+ /// Saves the information from the currently parsed dwarf .loc directive
+ /// and sets DwarfLocSeen. When the next instruction is assembled an entry
+ /// in the line number table with this information and the address of the
+ /// instruction will be created.
void setCurrentDwarfLoc(unsigned FileNum, unsigned Line, unsigned Column,
unsigned Flags, unsigned Isa,
unsigned Discriminator) {
void setGenDwarfFileNumber(unsigned FileNumber) {
GenDwarfFileNumber = FileNumber;
}
- const MCSection *getGenDwarfSection() { return GenDwarfSection; }
- void setGenDwarfSection(const MCSection *Sec) { GenDwarfSection = Sec; }
- MCSymbol *getGenDwarfSectionStartSym() { return GenDwarfSectionStartSym; }
- void setGenDwarfSectionStartSym(MCSymbol *Sym) {
- GenDwarfSectionStartSym = Sym;
+ MapVector<const MCSection *, std::pair<MCSymbol *, MCSymbol *> > &
+ getGenDwarfSectionSyms() {
+ return SectionStartEndSyms;
}
- MCSymbol *getGenDwarfSectionEndSym() { return GenDwarfSectionEndSym; }
- void setGenDwarfSectionEndSym(MCSymbol *Sym) {
- GenDwarfSectionEndSym = Sym;
+ std::pair<MapVector<const MCSection *,
+ std::pair<MCSymbol *, MCSymbol *> >::iterator,
+ bool>
+ addGenDwarfSection(const MCSection *Sec) {
+ return SectionStartEndSyms.insert(
+ std::make_pair(Sec, std::make_pair(nullptr, nullptr)));
}
- const std::vector<const MCGenDwarfLabelEntry *>
- &getMCGenDwarfLabelEntries() const {
+ void finalizeDwarfSections(MCStreamer &MCOS);
+ const std::vector<MCGenDwarfLabelEntry> &getMCGenDwarfLabelEntries() const {
return MCGenDwarfLabelEntries;
}
- void addMCGenDwarfLabelEntry(const MCGenDwarfLabelEntry *E) {
+ void addMCGenDwarfLabelEntry(const MCGenDwarfLabelEntry &E) {
MCGenDwarfLabelEntries.push_back(E);
}
void setDwarfDebugProducer(StringRef S) { DwarfDebugProducer = S; }
StringRef getDwarfDebugProducer() { return DwarfDebugProducer; }
+ void setDwarfVersion(uint16_t v) { DwarfVersion = v; }
+ uint16_t getDwarfVersion() const { return DwarfVersion; }
+
/// @}
char *getSecureLogFile() { return SecureLogFile; }
// Unrecoverable error has occurred. Display the best diagnostic we can
// and bail via exit(1). For now, most MC backend errors are unrecoverable.
// FIXME: We should really do something about that.
- LLVM_ATTRIBUTE_NORETURN void FatalError(SMLoc L, const Twine &Msg);
+ LLVM_ATTRIBUTE_NORETURN void FatalError(SMLoc L, const Twine &Msg) const;
};
} // end namespace llvm
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