#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 MCAsmInfo;
class MCExpr;
class MCSection;
class MCSymbol;
- class StringRef;
- class Twine;
+ class MCSymbolELF;
+ class MCLabel;
+ struct MCDwarfFile;
+ class MCDwarfLoc;
+ class MCObjectFileInfo;
+ class MCRegisterInfo;
+ class MCLineSection;
+ class SMLoc;
+ 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&); // DO NOT IMPLEMENT
- MCContext &operator=(const MCContext&); // DO NOT IMPLEMENT
+ MCContext(const MCContext &) = delete;
+ MCContext &operator=(const MCContext &) = delete;
- /// Sections - Bindings of names to allocated sections.
- StringMap<MCSection*> Sections;
+ public:
+ typedef StringMap<MCSymbol *, BumpPtrAllocator &> SymbolTable;
+
+ private:
+ /// The SourceMgr for this object, if any.
+ const SourceMgr *SrcMgr;
+
+ /// The MCAsmInfo for this target.
+ const MCAsmInfo *MAI;
+
+ /// The MCRegisterInfo for this target.
+ const MCRegisterInfo *MRI;
- /// Symbols - Bindings of names to symbols.
- StringMap<MCSymbol*> Symbols;
+ /// 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;
+
+ SpecificBumpPtrAllocator<MCSectionCOFF> COFFAllocator;
+ SpecificBumpPtrAllocator<MCSectionELF> ELFAllocator;
+ SpecificBumpPtrAllocator<MCSectionMachO> MachOAllocator;
+
+ /// Bindings of names to symbols.
+ SymbolTable Symbols;
+
+ /// ELF sections can have a corresponding symbol. This maps one to the
+ /// other.
+ DenseMap<const MCSectionELF *, MCSymbolELF *> SectionSymbols;
+
+ /// A mapping from a local label number and an instance count to a symbol.
+ /// For example, in the assembly
+ /// 1:
+ /// 2:
+ /// 1:
+ /// We have three labels represented by the pairs (1, 0), (2, 0) and (1, 1)
+ DenseMap<std::pair<unsigned, unsigned>, MCSymbol *> LocalSymbols;
+
+ /// Keeps tracks of names that were used both for used declared and
+ /// artificial symbols.
+ StringMap<bool, BumpPtrAllocator &> UsedNames;
+
+ /// 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;
+ /// NextInstance() creates the next instance of the directional local label
+ /// for the LocalLabelVal and adds it to the map if needed.
+ unsigned NextInstance(unsigned LocalLabelVal);
+ /// GetInstance() gets the current instance of the directional local label
+ /// for the LocalLabelVal and adds it to the map if needed.
+ unsigned GetInstance(unsigned LocalLabelVal);
+
+ /// The file name of the log file from the environment variable
+ /// AS_SECURE_LOG_FILE. Which must be set before the .secure_log_unique
+ /// directive is used or it is an error.
+ char *SecureLogFile;
+ /// The stream that gets written to for the .secure_log_unique directive.
+ raw_ostream *SecureLog;
+ /// Boolean toggled when .secure_log_unique / .secure_log_reset is seen to
+ /// catch errors if .secure_log_unique appears twice without
+ /// .secure_log_reset appearing between them.
+ bool SecureLogUsed;
+
+ /// The compilation directory to use for DW_AT_comp_dir.
+ SmallString<128> CompilationDir;
+
+ /// The main file name if passed in explicitly.
+ std::string MainFileName;
+
+ /// The dwarf file and directory tables from the dwarf .file directive.
+ /// We now emit a line table for each compile unit. To reduce the prologue
+ /// size of each line table, the files and directories used by each compile
+ /// unit are separated.
+ std::map<unsigned, MCDwarfLineTable> MCDwarfLineTablesCUMap;
+
+ /// The current dwarf line information from the last dwarf .loc directive.
+ MCDwarfLoc CurrentDwarfLoc;
+ bool DwarfLocSeen;
+
+ /// Generate dwarf debugging info for assembly source files.
+ bool GenDwarfForAssembly;
+
+ /// The current dwarf file number when generate dwarf debugging info for
+ /// assembly source files.
+ unsigned GenDwarfFileNumber;
+
+ /// Sections for generating the .debug_ranges and .debug_aranges sections.
+ SetVector<MCSection *> SectionsForRanges;
+
+ /// The information gathered from labels that will have dwarf label
+ /// entries when generating dwarf assembly source files.
+ std::vector<MCGenDwarfLabelEntry> MCGenDwarfLabelEntries;
+
+ /// The string to embed in the debug information for the compile unit, if
+ /// non-empty.
+ StringRef DwarfDebugFlags;
+
+ /// The string to embed in as the dwarf AT_producer for the compile unit, if
+ /// 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).
+ bool AllowTemporaryLabels;
+ bool UseNamesOnTempLabels = true;
+
+ /// The Compile Unit ID that we are currently processing.
+ unsigned DwarfCompileUnitID;
+
+ 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<MCSectionMachO *> MachOUniquingMap;
+ std::map<ELFSectionKey, MCSectionELF *> ELFUniquingMap;
+ std::map<COFFSectionKey, MCSectionCOFF *> COFFUniquingMap;
+ StringMap<bool> ELFRelSecNames;
+
+ /// Do automatic reset in destructor
+ bool AutoReset;
+
+ MCSymbol *createSymbolImpl(const StringMapEntry<bool> *Name,
+ bool CanBeUnnamed);
+ MCSymbol *createSymbol(StringRef Name, bool AlwaysAddSuffix,
+ bool IsTemporary);
+
+ MCSymbol *getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal,
+ unsigned Instance);
+
public:
- MCContext();
+ explicit MCContext(const MCAsmInfo *MAI, const MCRegisterInfo *MRI,
+ const MCObjectFileInfo *MOFI,
+ const SourceMgr *Mgr = nullptr, bool DoAutoReset = true);
~MCContext();
- /// @name Symbol Managment
+ const SourceMgr *getSourceManager() const { return SrcMgr; }
+
+ const MCAsmInfo *getAsmInfo() const { return MAI; }
+
+ const MCRegisterInfo *getRegisterInfo() const { return MRI; }
+
+ const MCObjectFileInfo *getObjectFileInfo() const { return MOFI; }
+
+ void setAllowTemporaryLabels(bool Value) { AllowTemporaryLabels = Value; }
+ void setUseNamesOnTempLabels(bool Value) { UseNamesOnTempLabels = Value; }
+
+ /// \name Module Lifetime Management
/// @{
- /// CreateSymbol - Create a new symbol with the specified @param Name.
- ///
- /// @param Name - The symbol name, which must be unique across all symbols.
- MCSymbol *CreateSymbol(const StringRef &Name);
+ /// reset - return object to right after construction state to prepare
+ /// to process a new module
+ void reset();
+
+ /// @}
+
+ /// \name Symbol Management
+ /// @{
+
+ /// Create and return a new linker temporary symbol with a unique but
+ /// unspecified name.
+ MCSymbol *createLinkerPrivateTempSymbol();
+
+ /// Create and return a new assembler temporary symbol with a unique but
+ /// unspecified name.
+ MCSymbol *createTempSymbol(bool CanBeUnnamed = true);
+
+ MCSymbol *createTempSymbol(const Twine &Name, bool AlwaysAddSuffix,
+ bool CanBeUnnamed = true);
- /// GetOrCreateSymbol - Lookup the symbol inside with the specified
- /// @param Name. If it exists, return it. If not, create a forward
- /// reference and return it.
+ /// Create the definition of a directional local symbol for numbered label
+ /// (used for "1:" definitions).
+ MCSymbol *createDirectionalLocalSymbol(unsigned LocalLabelVal);
+
+ /// Create and return a directional local symbol for numbered label (used
+ /// for "1b" or 1f" references).
+ MCSymbol *getDirectionalLocalSymbol(unsigned LocalLabelVal, bool Before);
+
+ /// 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.
- /// @param IsTemporary - Whether this symbol is an assembler temporary,
- /// which should not survive into the symbol table for the translation unit.
- MCSymbol *GetOrCreateSymbol(const StringRef &Name);
- MCSymbol *GetOrCreateSymbol(const Twine &Name);
-
- /// CreateTemporarySymbol - Create a new temporary symbol with the specified
- /// @param Name.
+ /// \param Name - The symbol name, which must be unique across all symbols.
+ MCSymbol *getOrCreateSymbol(const Twine &Name);
+
+ MCSymbolELF *getOrCreateSectionSymbol(const MCSectionELF &Section);
+
+ /// Gets a symbol that will be defined to the final stack offset of a local
+ /// variable after codegen.
///
- /// @param Name - The symbol name, for debugging purposes only, temporary
- /// symbols do not surive assembly. If non-empty the name must be unique
- /// across all symbols.
- MCSymbol *CreateTemporarySymbol(const StringRef &Name = "");
+ /// \param Idx - The index of a local variable passed to @llvm.localescape.
+ MCSymbol *getOrCreateFrameAllocSymbol(StringRef FuncName, unsigned Idx);
+
+ MCSymbol *getOrCreateParentFrameOffsetSymbol(StringRef FuncName);
+
+ MCSymbol *getOrCreateLSDASymbol(StringRef FuncName);
+
+ /// Get the symbol for \p Name, or null.
+ MCSymbol *lookupSymbol(const Twine &Name) const;
- /// LookupSymbol - Get the symbol for @param Name, or null.
- MCSymbol *LookupSymbol(const StringRef &Name) const;
+ /// getSymbols - Get a reference for the symbol table for clients that
+ /// want to, for example, iterate over all symbols. 'const' because we
+ /// still want any modifications to the table itself to use the MCContext
+ /// APIs.
+ const SymbolTable &getSymbols() const { return Symbols; }
/// @}
- void *Allocate(unsigned Size, unsigned Align = 8) {
- return Allocator.Allocate(Size, Align);
+ /// \name Section Management
+ /// @{
+
+ /// Return the MCSection for the specified mach-o section. This requires
+ /// the operands to be valid.
+ MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section,
+ unsigned TypeAndAttributes,
+ unsigned Reserved2, SectionKind K,
+ const char *BeginSymName = nullptr);
+
+ MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section,
+ unsigned TypeAndAttributes, SectionKind K,
+ const char *BeginSymName = nullptr) {
+ return getMachOSection(Segment, Section, TypeAndAttributes, 0, K,
+ BeginSymName);
}
- void Deallocate(void *Ptr) {
+
+ MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags) {
+ return getELFSection(Section, Type, Flags, nullptr);
+ }
+
+ MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, const char *BeginSymName) {
+ return getELFSection(Section, Type, Flags, 0, "", BeginSymName);
}
+
+ MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ StringRef Group) {
+ return getELFSection(Section, Type, Flags, EntrySize, Group, nullptr);
+ }
+
+ MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ StringRef Group, const char *BeginSymName) {
+ return getELFSection(Section, Type, Flags, EntrySize, Group, ~0,
+ BeginSymName);
+ }
+
+ MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ StringRef Group, unsigned UniqueID) {
+ return getELFSection(Section, Type, Flags, EntrySize, Group, UniqueID,
+ nullptr);
+ }
+
+ MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ StringRef Group, unsigned UniqueID,
+ const char *BeginSymName);
+
+ MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ const MCSymbolELF *Group, unsigned UniqueID,
+ const char *BeginSymName,
+ const MCSectionELF *Associated);
+
+ MCSectionELF *createELFRelSection(StringRef Name, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ const MCSymbolELF *Group,
+ const MCSectionELF *Associated);
+
+ void renameELFSection(MCSectionELF *Section, StringRef Name);
+
+ MCSectionELF *createELFGroupSection(const MCSymbolELF *Group);
+
+ MCSectionCOFF *getCOFFSection(StringRef Section, unsigned Characteristics,
+ SectionKind Kind, StringRef COMDATSymName,
+ int Selection,
+ const char *BeginSymName = nullptr);
+
+ MCSectionCOFF *getCOFFSection(StringRef Section, unsigned Characteristics,
+ SectionKind Kind,
+ const char *BeginSymName = nullptr);
+
+ 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.
+ MCSectionCOFF *getAssociativeCOFFSection(MCSectionCOFF *Sec,
+ const MCSymbol *KeySym);
+
+ /// @}
+
+ /// \name Dwarf Management
+ /// @{
+
+ /// \brief Get the compilation directory for DW_AT_comp_dir
+ /// This can be overridden by clients which want to control the reported
+ /// compilation directory and have it be something other than the current
+ /// working directory.
+ /// Returns an empty string if the current directory cannot be determined.
+ StringRef getCompilationDir() const { return CompilationDir; }
+
+ /// \brief Set the compilation directory for DW_AT_comp_dir
+ /// Override the default (CWD) compilation directory.
+ void setCompilationDir(StringRef S) { CompilationDir = S.str(); }
+
+ /// \brief Get the main file name for use in error messages and debug
+ /// info. This can be set to ensure we've got the correct file name
+ /// after preprocessing or for -save-temps.
+ const std::string &getMainFileName() const { return MainFileName; }
+
+ /// \brief Set the main file name and override the default.
+ void setMainFileName(StringRef S) { MainFileName = S; }
+
+ /// Creates an entry in the dwarf file and directory tables.
+ unsigned getDwarfFile(StringRef Directory, StringRef FileName,
+ unsigned FileNumber, unsigned CUID);
+
+ bool isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID = 0);
+
+ const std::map<unsigned, MCDwarfLineTable> &getMCDwarfLineTables() const {
+ return MCDwarfLineTablesCUMap;
+ }
+
+ MCDwarfLineTable &getMCDwarfLineTable(unsigned CUID) {
+ return MCDwarfLineTablesCUMap[CUID];
+ }
+
+ const MCDwarfLineTable &getMCDwarfLineTable(unsigned CUID) const {
+ auto I = MCDwarfLineTablesCUMap.find(CUID);
+ assert(I != MCDwarfLineTablesCUMap.end());
+ return I->second;
+ }
+
+ const SmallVectorImpl<MCDwarfFile> &getMCDwarfFiles(unsigned CUID = 0) {
+ return getMCDwarfLineTable(CUID).getMCDwarfFiles();
+ }
+ const SmallVectorImpl<std::string> &getMCDwarfDirs(unsigned CUID = 0) {
+ return getMCDwarfLineTable(CUID).getMCDwarfDirs();
+ }
+
+ bool hasMCLineSections() const {
+ for (const auto &Table : MCDwarfLineTablesCUMap)
+ if (!Table.second.getMCDwarfFiles().empty() || Table.second.getLabel())
+ return true;
+ return false;
+ }
+ unsigned getDwarfCompileUnitID() { return DwarfCompileUnitID; }
+ void setDwarfCompileUnitID(unsigned CUIndex) {
+ DwarfCompileUnitID = CUIndex;
+ }
+ void setMCLineTableCompilationDir(unsigned CUID, StringRef CompilationDir) {
+ getMCDwarfLineTable(CUID).setCompilationDir(CompilationDir);
+ }
+
+ /// 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) {
+ CurrentDwarfLoc.setFileNum(FileNum);
+ CurrentDwarfLoc.setLine(Line);
+ CurrentDwarfLoc.setColumn(Column);
+ CurrentDwarfLoc.setFlags(Flags);
+ CurrentDwarfLoc.setIsa(Isa);
+ CurrentDwarfLoc.setDiscriminator(Discriminator);
+ DwarfLocSeen = true;
+ }
+ void clearDwarfLocSeen() { DwarfLocSeen = false; }
+
+ bool getDwarfLocSeen() { return DwarfLocSeen; }
+ const MCDwarfLoc &getCurrentDwarfLoc() { return CurrentDwarfLoc; }
+
+ bool getGenDwarfForAssembly() { return GenDwarfForAssembly; }
+ void setGenDwarfForAssembly(bool Value) { GenDwarfForAssembly = Value; }
+ unsigned getGenDwarfFileNumber() { return GenDwarfFileNumber; }
+ void setGenDwarfFileNumber(unsigned FileNumber) {
+ GenDwarfFileNumber = FileNumber;
+ }
+ const SetVector<MCSection *> &getGenDwarfSectionSyms() {
+ return SectionsForRanges;
+ }
+ bool addGenDwarfSection(MCSection *Sec) {
+ return SectionsForRanges.insert(Sec);
+ }
+
+ void finalizeDwarfSections(MCStreamer &MCOS);
+ const std::vector<MCGenDwarfLabelEntry> &getMCGenDwarfLabelEntries() const {
+ return MCGenDwarfLabelEntries;
+ }
+ void addMCGenDwarfLabelEntry(const MCGenDwarfLabelEntry &E) {
+ MCGenDwarfLabelEntries.push_back(E);
+ }
+
+ void setDwarfDebugFlags(StringRef S) { DwarfDebugFlags = S; }
+ StringRef getDwarfDebugFlags() { return DwarfDebugFlags; }
+
+ 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; }
+ raw_ostream *getSecureLog() { return SecureLog; }
+ bool getSecureLogUsed() { return SecureLogUsed; }
+ void setSecureLog(raw_ostream *Value) { SecureLog = Value; }
+ void setSecureLogUsed(bool Value) { SecureLogUsed = Value; }
+
+ void *allocate(unsigned Size, unsigned Align = 8) {
+ return Allocator.Allocate(Size, Align);
+ }
+ void deallocate(void *Ptr) {}
+
+ // 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 reportFatalError(SMLoc L,
+ const Twine &Msg) const;
};
} // end namespace llvm
// operator new and delete aren't allowed inside namespaces.
// The throw specifications are mandated by the standard.
-/// @brief Placement new for using the MCContext's allocator.
+/// \brief Placement new for using the MCContext's allocator.
///
/// This placement form of operator new uses the MCContext's allocator for
/// obtaining memory. It is a non-throwing new, which means that it returns
/// null on error. (If that is what the allocator does. The current does, so if
/// this ever changes, this operator will have to be changed, too.)
/// Usage looks like this (assuming there's an MCContext 'Context' in scope):
-/// @code
-/// // Default alignment (16)
+/// \code
+/// // Default alignment (8)
/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments);
/// // Specific alignment
-/// IntegerLiteral *Ex2 = new (Context, 8) IntegerLiteral(arguments);
-/// @endcode
+/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments);
+/// \endcode
/// Please note that you cannot use delete on the pointer; it must be
/// deallocated using an explicit destructor call followed by
-/// @c Context.Deallocate(Ptr).
+/// \c Context.Deallocate(Ptr).
///
-/// @param Bytes The number of bytes to allocate. Calculated by the compiler.
-/// @param C The MCContext that provides the allocator.
-/// @param Alignment The alignment of the allocated memory (if the underlying
+/// \param Bytes The number of bytes to allocate. Calculated by the compiler.
+/// \param C The MCContext that provides the allocator.
+/// \param Alignment The alignment of the allocated memory (if the underlying
/// allocator supports it).
-/// @return The allocated memory. Could be NULL.
+/// \return The allocated memory. Could be NULL.
inline void *operator new(size_t Bytes, llvm::MCContext &C,
- size_t Alignment = 16) throw () {
- return C.Allocate(Bytes, Alignment);
+ size_t Alignment = 8) LLVM_NOEXCEPT {
+ return C.allocate(Bytes, Alignment);
}
-/// @brief Placement delete companion to the new above.
+/// \brief Placement delete companion to the new above.
///
/// This operator is just a companion to the new above. There is no way of
/// invoking it directly; see the new operator for more details. This operator
/// is called implicitly by the compiler if a placement new expression using
/// the MCContext throws in the object constructor.
-inline void operator delete(void *Ptr, llvm::MCContext &C, size_t)
- throw () {
- C.Deallocate(Ptr);
+inline void operator delete(void *Ptr, llvm::MCContext &C,
+ size_t) LLVM_NOEXCEPT {
+ C.deallocate(Ptr);
}
/// This placement form of operator new[] uses the MCContext's allocator for
/// obtaining memory. It is a non-throwing new[], which means that it returns
/// null on error.
/// Usage looks like this (assuming there's an MCContext 'Context' in scope):
-/// @code
-/// // Default alignment (16)
+/// \code
+/// // Default alignment (8)
/// char *data = new (Context) char[10];
/// // Specific alignment
-/// char *data = new (Context, 8) char[10];
-/// @endcode
+/// char *data = new (Context, 4) char[10];
+/// \endcode
/// Please note that you cannot use delete on the pointer; it must be
/// deallocated using an explicit destructor call followed by
-/// @c Context.Deallocate(Ptr).
+/// \c Context.Deallocate(Ptr).
///
-/// @param Bytes The number of bytes to allocate. Calculated by the compiler.
-/// @param C The MCContext that provides the allocator.
-/// @param Alignment The alignment of the allocated memory (if the underlying
+/// \param Bytes The number of bytes to allocate. Calculated by the compiler.
+/// \param C The MCContext that provides the allocator.
+/// \param Alignment The alignment of the allocated memory (if the underlying
/// allocator supports it).
-/// @return The allocated memory. Could be NULL.
-inline void *operator new[](size_t Bytes, llvm::MCContext& C,
- size_t Alignment = 16) throw () {
- return C.Allocate(Bytes, Alignment);
+/// \return The allocated memory. Could be NULL.
+inline void *operator new[](size_t Bytes, llvm::MCContext &C,
+ size_t Alignment = 8) LLVM_NOEXCEPT {
+ return C.allocate(Bytes, Alignment);
}
-/// @brief Placement delete[] companion to the new[] above.
+/// \brief Placement delete[] companion to the new[] above.
///
/// This operator is just a companion to the new[] above. There is no way of
/// invoking it directly; see the new[] operator for more details. This operator
/// is called implicitly by the compiler if a placement new[] expression using
/// the MCContext throws in the object constructor.
-inline void operator delete[](void *Ptr, llvm::MCContext &C) throw () {
- C.Deallocate(Ptr);
+inline void operator delete[](void *Ptr, llvm::MCContext &C) LLVM_NOEXCEPT {
+ C.deallocate(Ptr);
}
#endif
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