#include "llvm/Support/ELF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetMachine.h"
using namespace llvm;
using namespace dwarf;
default:
report_fatal_error("We do not support this DWARF encoding yet!");
case dwarf::DW_EH_PE_absptr:
- return TM.getTargetLowering()->getSymbol(GV, Mang);
+ return TM.getSymbol(GV, Mang);
case dwarf::DW_EH_PE_pcrel: {
return getContext().GetOrCreateSymbol(StringRef("DW.ref.") +
- TM.getTargetLowering()->getSymbol(GV, Mang)->getName());
+ TM.getSymbol(GV, Mang)->getName());
}
}
}
// Add information about the stub reference to ELFMMI so that the stub
// gets emitted by the asmprinter.
MachineModuleInfoImpl::StubValueTy &StubSym = ELFMMI.getGVStubEntry(SSym);
- if (StubSym.getPointer() == 0) {
- MCSymbol *Sym = TM.getTargetLowering()->getSymbol(GV, Mang);
+ if (!StubSym.getPointer()) {
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
}
Prefix = getSectionPrefixForGlobal(Kind);
SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
- MCSymbol *Sym = TM.getTargetLowering()->getSymbol(GV, Mang);
- Name.append(Sym->getName().begin(), Sym->getName().end());
+ TM.getNameWithPrefix(Name, GV, Mang, true);
+
StringRef Group = "";
unsigned Flags = getELFSectionFlags(Kind);
if (GV->isWeakForLinker()) {
- Group = Sym->getName();
+ Group = Name.substr(strlen(Prefix));
Flags |= ELF::SHF_GROUP;
}
return DataRelROSection;
}
-const MCSection *
-TargetLoweringObjectFileELF::getStaticCtorSection(unsigned Priority) const {
+const MCSection *TargetLoweringObjectFileELF::getStaticCtorSection(
+ unsigned Priority, const MCSymbol *KeySym, const MCSection *KeySec) const {
// The default scheme is .ctor / .dtor, so we have to invert the priority
// numbering.
if (Priority == 65535)
}
}
-const MCSection *
-TargetLoweringObjectFileELF::getStaticDtorSection(unsigned Priority) const {
+const MCSection *TargetLoweringObjectFileELF::getStaticDtorSection(
+ unsigned Priority, const MCSymbol *KeySym, const MCSection *KeySec) const {
// The default scheme is .ctor / .dtor, so we have to invert the priority
// numbering.
if (Priority == 65535)
Mangler &Mang, const TargetMachine &TM) const {
unsigned VersionVal = 0;
unsigned ImageInfoFlags = 0;
- MDNode *LinkerOptions = 0;
+ MDNode *LinkerOptions = nullptr;
StringRef SectionVal;
for (ArrayRef<Module::ModuleFlagEntry>::iterator
// These sections are atomized at the element boundaries without using
// symbols.
- case MCSectionMachO::S_4BYTE_LITERALS:
- case MCSectionMachO::S_8BYTE_LITERALS:
- case MCSectionMachO::S_16BYTE_LITERALS:
- case MCSectionMachO::S_LITERAL_POINTERS:
- case MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS:
- case MCSectionMachO::S_LAZY_SYMBOL_POINTERS:
- case MCSectionMachO::S_MOD_INIT_FUNC_POINTERS:
- case MCSectionMachO::S_MOD_TERM_FUNC_POINTERS:
- case MCSectionMachO::S_INTERPOSING:
+ case MachO::S_4BYTE_LITERALS:
+ case MachO::S_8BYTE_LITERALS:
+ case MachO::S_16BYTE_LITERALS:
+ case MachO::S_LITERAL_POINTERS:
+ case MachO::S_NON_LAZY_SYMBOL_POINTERS:
+ case MachO::S_LAZY_SYMBOL_POINTERS:
+ case MachO::S_MOD_INIT_FUNC_POINTERS:
+ case MachO::S_MOD_TERM_FUNC_POINTERS:
+ case MachO::S_INTERPOSING:
return false;
}
}
return ReadOnlySection; // .const
}
-/// This hook allows targets to selectively decide not to emit the UsedDirective
-/// for some symbols in llvm.used.
-// FIXME: REMOVE this (rdar://7071300)
-bool TargetLoweringObjectFileMachO::shouldEmitUsedDirectiveFor(
- const GlobalValue *GV, Mangler &Mang, TargetMachine &TM) const {
- // Check whether the mangled name has the "Private" or "LinkerPrivate" prefix.
- if (GV->hasLocalLinkage() && !isa<Function>(GV)) {
- // FIXME: ObjC metadata is currently emitted as internal symbols that have
- // \1L and \0l prefixes on them. Fix them to be Private/LinkerPrivate and
- // this horrible hack can go away.
- MCSymbol *Sym = TM.getTargetLowering()->getSymbol(GV, Mang);
- if (Sym->getName()[0] == 'L' || Sym->getName()[0] == 'l')
- return false;
- }
-
- return true;
-}
-
const MCExpr *TargetLoweringObjectFileMachO::getTTypeGlobalReference(
const GlobalValue *GV, unsigned Encoding, Mangler &Mang,
const TargetMachine &TM, MachineModuleInfo *MMI,
MachineModuleInfoImpl::StubValueTy &StubSym =
GV->hasHiddenVisibility() ? MachOMMI.getHiddenGVStubEntry(SSym) :
MachOMMI.getGVStubEntry(SSym);
- if (StubSym.getPointer() == 0) {
- MCSymbol *Sym = TM.getTargetLowering()->getSymbol(GV, Mang);
+ if (!StubSym.getPointer()) {
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
}
// Add information about the stub reference to MachOMMI so that the stub
// gets emitted by the asmprinter.
MachineModuleInfoImpl::StubValueTy &StubSym = MachOMMI.getGVStubEntry(SSym);
- if (StubSym.getPointer() == 0) {
- MCSymbol *Sym = TM.getTargetLowering()->getSymbol(GV, Mang);
+ if (!StubSym.getPointer()) {
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
}
if (GV->isWeakForLinker()) {
Selection = COFF::IMAGE_COMDAT_SELECT_ANY;
Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
- MCSymbol *Sym = TM.getTargetLowering()->getSymbol(GV, Mang);
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
COMDATSymName = Sym->getName();
}
return getContext().getCOFFSection(Name,
static const char *getCOFFSectionNameForUniqueGlobal(SectionKind Kind) {
if (Kind.isText())
return ".text";
- if (Kind.isBSS ())
+ if (Kind.isBSS())
return ".bss";
if (Kind.isThreadLocal())
return ".tls$";
const MCSection *TargetLoweringObjectFileCOFF::
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang, const TargetMachine &TM) const {
+ // If we have -ffunction-sections then we should emit the global value to a
+ // uniqued section specifically for it.
+ bool EmitUniquedSection;
+ if (Kind.isText())
+ EmitUniquedSection = TM.getFunctionSections();
+ else
+ EmitUniquedSection = TM.getDataSections();
// If this global is linkonce/weak and the target handles this by emitting it
// into a 'uniqued' section name, create and return the section now.
- if (GV->isWeakForLinker()) {
+ // Section names depend on the name of the symbol which is not feasible if the
+ // symbol has private linkage.
+ if ((GV->isWeakForLinker() || EmitUniquedSection) &&
+ !GV->hasPrivateLinkage() && !Kind.isCommon()) {
const char *Name = getCOFFSectionNameForUniqueGlobal(Kind);
unsigned Characteristics = getCOFFSectionFlags(Kind);
Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
- MCSymbol *Sym = TM.getTargetLowering()->getSymbol(GV, Mang);
- return getContext().getCOFFSection(Name, Characteristics,
- Kind, Sym->getName(),
- COFF::IMAGE_COMDAT_SELECT_ANY);
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
+ return getContext().getCOFFSection(
+ Name, Characteristics, Kind, Sym->getName(),
+ GV->isWeakForLinker() ? COFF::IMAGE_COMDAT_SELECT_ANY
+ : COFF::IMAGE_COMDAT_SELECT_NODUPLICATES);
}
if (Kind.isText())
if (Kind.isReadOnly())
return ReadOnlySection;
- if (Kind.isBSS())
+ // Note: we claim that common symbols are put in BSSSection, but they are
+ // really emitted with the magic .comm directive, which creates a symbol table
+ // entry but not a section.
+ if (Kind.isBSS() || Kind.isCommon())
return BSSSection;
return DataSection;
emitModuleFlags(MCStreamer &Streamer,
ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
Mangler &Mang, const TargetMachine &TM) const {
- MDNode *LinkerOptions = 0;
+ MDNode *LinkerOptions = nullptr;
// Look for the "Linker Options" flag, since it's the only one we support.
for (ArrayRef<Module::ModuleFlagEntry>::iterator
}
}
}
+
+static const MCSection *getAssociativeCOFFSection(MCContext &Ctx,
+ const MCSection *Sec,
+ const MCSymbol *KeySym,
+ const MCSection *KeySec) {
+ // Return the normal section if we don't have to be associative.
+ if (!KeySym)
+ return Sec;
+
+ // Make an associative section with the same name and kind as the normal
+ // section.
+ const MCSectionCOFF *SecCOFF = cast<MCSectionCOFF>(Sec);
+ const MCSectionCOFF *KeySecCOFF = cast<MCSectionCOFF>(KeySec);
+ unsigned Characteristics =
+ SecCOFF->getCharacteristics() | COFF::IMAGE_SCN_LNK_COMDAT;
+ return Ctx.getCOFFSection(SecCOFF->getSectionName(), Characteristics,
+ SecCOFF->getKind(), KeySym->getName(),
+ COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE, KeySecCOFF);
+}
+
+const MCSection *TargetLoweringObjectFileCOFF::getStaticCtorSection(
+ unsigned Priority, const MCSymbol *KeySym, const MCSection *KeySec) const {
+ return getAssociativeCOFFSection(getContext(), StaticCtorSection, KeySym, KeySec);
+}
+
+const MCSection *TargetLoweringObjectFileCOFF::getStaticDtorSection(
+ unsigned Priority, const MCSymbol *KeySym, const MCSection *KeySec) const {
+ return getAssociativeCOFFSection(getContext(), StaticDtorSection, KeySym, KeySec);
+}
projects / oota-llvm.git / blobdiff