#include "llvm/MC/MCContext.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCLabel.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCSymbolCOFF.h"
+#include "llvm/MC/MCSymbolELF.h"
+#include "llvm/MC/MCSymbolMachO.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
}
MCContext::~MCContext() {
-
if (AutoReset)
reset();
//===----------------------------------------------------------------------===//
void MCContext::reset() {
+ // Call the destructors so the fragments are freed
+ for (auto &I : ELFUniquingMap)
+ I.second->~MCSectionELF();
+ for (auto &I : COFFUniquingMap)
+ I.second->~MCSectionCOFF();
+ for (auto &I : MachOUniquingMap)
+ I.second->~MCSectionMachO();
+
UsedNames.clear();
Symbols.clear();
Allocator.Reset();
MCSymbol *&Sym = Symbols[NameRef];
if (!Sym)
- Sym = CreateSymbol(NameRef, false);
+ Sym = createSymbol(NameRef, false, false);
return Sym;
}
-MCSymbol *MCContext::getOrCreateSectionSymbol(const MCSectionELF &Section) {
- MCSymbol *&Sym = SectionSymbols[&Section];
+MCSymbolELF *MCContext::getOrCreateSectionSymbol(const MCSectionELF &Section) {
+ MCSymbolELF *&Sym = SectionSymbols[&Section];
if (Sym)
return Sym;
MCSymbol *&OldSym = Symbols[Name];
if (OldSym && OldSym->isUndefined()) {
- Sym = OldSym;
- return OldSym;
+ Sym = cast<MCSymbolELF>(OldSym);
+ return Sym;
}
auto NameIter = UsedNames.insert(std::make_pair(Name, true)).first;
- Sym = new (*this) MCSymbol(NameIter->getKey(), /*isTemporary*/ false);
+ Sym = new (&*NameIter, *this) MCSymbolELF(&*NameIter, /*isTemporary*/ false);
if (!OldSym)
OldSym = Sym;
FuncName);
}
-MCSymbol *MCContext::CreateSymbol(StringRef Name, bool AlwaysAddSuffix) {
- // Determine whether this is an assembler temporary or normal label, if used.
- bool IsTemporary = false;
- if (AllowTemporaryLabels)
- IsTemporary = Name.startswith(MAI->getPrivateGlobalPrefix());
+MCSymbol *MCContext::createSymbolImpl(const StringMapEntry<bool> *Name,
+ bool IsTemporary) {
+ if (MOFI) {
+ switch (MOFI->getObjectFileType()) {
+ case MCObjectFileInfo::IsCOFF:
+ return new (Name, *this) MCSymbolCOFF(Name, IsTemporary);
+ case MCObjectFileInfo::IsELF:
+ return new (Name, *this) MCSymbolELF(Name, IsTemporary);
+ case MCObjectFileInfo::IsMachO:
+ return new (Name, *this) MCSymbolMachO(Name, IsTemporary);
+ }
+ }
+ return new (Name, *this) MCSymbol(MCSymbol::SymbolKindUnset, Name,
+ IsTemporary);
+}
+
+MCSymbol *MCContext::createSymbol(StringRef Name, bool AlwaysAddSuffix,
+ bool CanBeUnnamed) {
+ if (CanBeUnnamed && !UseNamesOnTempLabels)
+ return createSymbolImpl(nullptr, true);
- if (IsTemporary && AlwaysAddSuffix && !UseNamesOnTempLabels)
- return new (*this) MCSymbol("", true);
+ // Determine whether this is an user writter assembler temporary or normal
+ // label, if used.
+ bool IsTemporary = CanBeUnnamed;
+ if (AllowTemporaryLabels && !IsTemporary)
+ IsTemporary = Name.startswith(MAI->getPrivateGlobalPrefix());
SmallString<128> NewName = Name;
bool AddSuffix = AlwaysAddSuffix;
if (NameEntry.second) {
// Ok, we found a name. Have the MCSymbol object itself refer to the copy
// of the string that is embedded in the UsedNames entry.
- MCSymbol *Result =
- new (*this) MCSymbol(NameEntry.first->getKey(), IsTemporary);
- return Result;
+ return createSymbolImpl(&*NameEntry.first, IsTemporary);
}
assert(IsTemporary && "Cannot rename non-temporary symbols");
AddSuffix = true;
llvm_unreachable("Infinite loop");
}
-MCSymbol *MCContext::createTempSymbol(const Twine &Name, bool AlwaysAddSuffix) {
+MCSymbol *MCContext::createTempSymbol(const Twine &Name, bool AlwaysAddSuffix,
+ bool CanBeUnnamed) {
SmallString<128> NameSV;
raw_svector_ostream(NameSV) << MAI->getPrivateGlobalPrefix() << Name;
- return CreateSymbol(NameSV, AlwaysAddSuffix);
+ return createSymbol(NameSV, AlwaysAddSuffix, CanBeUnnamed);
}
MCSymbol *MCContext::createLinkerPrivateTempSymbol() {
SmallString<128> NameSV;
raw_svector_ostream(NameSV) << MAI->getLinkerPrivateGlobalPrefix() << "tmp";
- return CreateSymbol(NameSV, true);
+ return createSymbol(NameSV, true, false);
}
-MCSymbol *MCContext::createTempSymbol() {
- return createTempSymbol("tmp", true);
+MCSymbol *MCContext::createTempSymbol(bool CanBeUnnamed) {
+ return createTempSymbol("tmp", true, CanBeUnnamed);
}
unsigned MCContext::NextInstance(unsigned LocalLabelVal) {
unsigned Instance) {
MCSymbol *&Sym = LocalSymbols[std::make_pair(LocalLabelVal, Instance)];
if (!Sym)
- Sym = createTempSymbol();
+ Sym = createTempSymbol(false);
return Sym;
}
// Section Management
//===----------------------------------------------------------------------===//
-const MCSectionMachO *
-MCContext::getMachOSection(StringRef Segment, StringRef Section,
- unsigned TypeAndAttributes, unsigned Reserved2,
- SectionKind Kind, const char *BeginSymName) {
+MCSectionMachO *MCContext::getMachOSection(StringRef Segment, StringRef Section,
+ unsigned TypeAndAttributes,
+ unsigned Reserved2, SectionKind Kind,
+ const char *BeginSymName) {
// We unique sections by their segment/section pair. The returned section
// may not have the same flags as the requested section, if so this should be
Name += Section;
// Do the lookup, if we have a hit, return it.
- const MCSectionMachO *&Entry = MachOUniquingMap[Name];
+ MCSectionMachO *&Entry = MachOUniquingMap[Name];
if (Entry)
return Entry;
Reserved2, Kind, Begin);
}
-void MCContext::renameELFSection(const MCSectionELF *Section, StringRef Name) {
+void MCContext::renameELFSection(MCSectionELF *Section, StringRef Name) {
StringRef GroupName;
if (const MCSymbol *Group = Section->getGroup())
GroupName = Group->getName();
const_cast<MCSectionELF *>(Section)->setSectionName(CachedName);
}
-const MCSectionELF *
-MCContext::createELFRelSection(StringRef Name, unsigned Type, unsigned Flags,
- unsigned EntrySize, const MCSymbol *Group,
- const MCSectionELF *Associated) {
+MCSectionELF *MCContext::createELFRelSection(StringRef Name, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ const MCSymbolELF *Group,
+ const MCSectionELF *Associated) {
StringMap<bool>::iterator I;
bool Inserted;
std::tie(I, Inserted) = ELFRelSecNames.insert(std::make_pair(Name, true));
EntrySize, Group, true, nullptr, Associated);
}
-const MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type,
- unsigned Flags, unsigned EntrySize,
- StringRef Group, unsigned UniqueID,
- const char *BeginSymName) {
- MCSymbol *GroupSym = nullptr;
+MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ StringRef Group, unsigned UniqueID,
+ const char *BeginSymName) {
+ MCSymbolELF *GroupSym = nullptr;
if (!Group.empty())
- GroupSym = getOrCreateSymbol(Group);
+ GroupSym = cast<MCSymbolELF>(getOrCreateSymbol(Group));
return getELFSection(Section, Type, Flags, EntrySize, GroupSym, UniqueID,
BeginSymName, nullptr);
}
-const MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type,
- unsigned Flags, unsigned EntrySize,
- const MCSymbol *GroupSym,
- unsigned UniqueID,
- const char *BeginSymName,
- const MCSectionELF *Associated) {
+MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ const MCSymbolELF *GroupSym,
+ unsigned UniqueID,
+ const char *BeginSymName,
+ const MCSectionELF *Associated) {
StringRef Group = "";
if (GroupSym)
Group = GroupSym->getName();
return Result;
}
-const MCSectionELF *MCContext::createELFGroupSection(const MCSymbol *Group) {
+MCSectionELF *MCContext::createELFGroupSection(const MCSymbolELF *Group) {
MCSectionELF *Result = new (*this)
MCSectionELF(".group", ELF::SHT_GROUP, 0, SectionKind::getReadOnly(), 4,
Group, ~0, nullptr, nullptr);
return Result;
}
-const MCSectionCOFF *
-MCContext::getCOFFSection(StringRef Section, unsigned Characteristics,
- SectionKind Kind, StringRef COMDATSymName,
- int Selection, const char *BeginSymName) {
+MCSectionCOFF *MCContext::getCOFFSection(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind,
+ StringRef COMDATSymName, int Selection,
+ const char *BeginSymName) {
MCSymbol *COMDATSymbol = nullptr;
if (!COMDATSymName.empty()) {
COMDATSymbol = getOrCreateSymbol(COMDATSymName);
return Result;
}
-const MCSectionCOFF *MCContext::getCOFFSection(StringRef Section,
- unsigned Characteristics,
- SectionKind Kind,
- const char *BeginSymName) {
+MCSectionCOFF *MCContext::getCOFFSection(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind,
+ const char *BeginSymName) {
return getCOFFSection(Section, Characteristics, Kind, "", 0, BeginSymName);
}
-const MCSectionCOFF *MCContext::getCOFFSection(StringRef Section) {
+MCSectionCOFF *MCContext::getCOFFSection(StringRef Section) {
COFFSectionKey T{Section, "", 0};
auto Iter = COFFUniquingMap.find(T);
if (Iter == COFFUniquingMap.end())
return Iter->second;
}
-const MCSectionCOFF *
-MCContext::getAssociativeCOFFSection(const MCSectionCOFF *Sec,
- const MCSymbol *KeySym) {
+MCSectionCOFF *MCContext::getAssociativeCOFFSection(MCSectionCOFF *Sec,
+ const MCSymbol *KeySym) {
// Return the normal section if we don't have to be associative.
if (!KeySym)
return Sec;
/// Remove empty sections from SectionStartEndSyms, to avoid generating
/// useless debug info for them.
void MCContext::finalizeDwarfSections(MCStreamer &MCOS) {
- std::vector<const MCSection *> Keep;
- for (const MCSection *Sec : SectionsForRanges) {
- MCOS.SwitchSection(Sec); // FIXME: pass the section to mayHaveInstructions
- if (MCOS.mayHaveInstructions())
- Keep.push_back(Sec);
- }
- SectionsForRanges.clear();
- SectionsForRanges.insert(Keep.begin(), Keep.end());
+ SectionsForRanges.remove_if(
+ [&](MCSection *Sec) { return !MCOS.mayHaveInstructions(*Sec); });
}
void MCContext::reportFatalError(SMLoc Loc, const Twine &Msg) const {