#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetLowering.h"
using namespace llvm;
using namespace dwarf;
// ELF
//===----------------------------------------------------------------------===//
-MCSymbol *
-TargetLoweringObjectFileELF::getCFIPersonalitySymbol(const GlobalValue *GV,
- Mangler &Mang,
- MachineModuleInfo *MMI) const {
+MCSymbol *TargetLoweringObjectFileELF::getCFIPersonalitySymbol(
+ const GlobalValue *GV, Mangler &Mang, const TargetMachine &TM,
+ MachineModuleInfo *MMI) const {
unsigned Encoding = getPersonalityEncoding();
switch (Encoding & 0x70) {
default:
report_fatal_error("We do not support this DWARF encoding yet!");
case dwarf::DW_EH_PE_absptr:
- return getSymbol(GV, Mang);
+ return TM.getSymbol(GV, Mang);
case dwarf::DW_EH_PE_pcrel: {
return getContext().GetOrCreateSymbol(StringRef("DW.ref.") +
- getSymbol(GV, Mang)->getName());
+ TM.getSymbol(GV, Mang)->getName());
}
}
}
const MCExpr *TargetLoweringObjectFileELF::getTTypeGlobalReference(
const GlobalValue *GV, unsigned Encoding, Mangler &Mang,
- MachineModuleInfo *MMI, MCStreamer &Streamer) const {
+ const TargetMachine &TM, MachineModuleInfo *MMI,
+ MCStreamer &Streamer) const {
if (Encoding & dwarf::DW_EH_PE_indirect) {
MachineModuleInfoELF &ELFMMI = MMI->getObjFileInfo<MachineModuleInfoELF>();
- MCSymbol *SSym = getSymbolWithGlobalValueBase(GV, ".DW.stub", Mang);
+ MCSymbol *SSym = getSymbolWithGlobalValueBase(GV, ".DW.stub", Mang, TM);
// 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 = getSymbol(GV, Mang);
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
}
Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
}
- return TargetLoweringObjectFile::getTTypeGlobalReference(GV, Encoding, Mang,
- MMI, Streamer);
+ return TargetLoweringObjectFile::
+ getTTypeGlobalReference(GV, Encoding, Mang, TM, MMI, Streamer);
}
static SectionKind
return Flags;
}
-
-const MCSection *TargetLoweringObjectFileELF::
-getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler &Mang, const TargetMachine &TM) const {
+const MCSection *TargetLoweringObjectFileELF::getExplicitSectionGlobal(
+ const GlobalValue *GV, SectionKind Kind, Mangler &Mang,
+ const TargetMachine &TM) const {
StringRef SectionName = GV->getSection();
// Infer section flags from the section name if we can.
Prefix = getSectionPrefixForGlobal(Kind);
SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
- MCSymbol *Sym = 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;
}
Streamer.AddBlankLine();
}
-const MCSection *TargetLoweringObjectFileMachO::
-getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler &Mang, const TargetMachine &TM) const {
+const MCSection *TargetLoweringObjectFileMachO::getExplicitSectionGlobal(
+ const GlobalValue *GV, SectionKind Kind, Mangler &Mang,
+ const TargetMachine &TM) const {
// Parse the section specifier and create it if valid.
StringRef Segment, Section;
unsigned TAA = 0, StubSize = 0;
return S;
}
+bool TargetLoweringObjectFileMachO::isSectionAtomizableBySymbols(
+ const MCSection &Section) const {
+ const MCSectionMachO &SMO = static_cast<const MCSectionMachO&>(Section);
+
+ // Sections holding 1 byte strings are atomized based on the data
+ // they contain.
+ // Sections holding 2 byte strings require symbols in order to be
+ // atomized.
+ // There is no dedicated section for 4 byte strings.
+ if (SMO.getKind().isMergeable1ByteCString())
+ return false;
+
+ if (SMO.getSegmentName() == "__DATA" &&
+ SMO.getSectionName() == "__cfstring")
+ return false;
+
+ switch (SMO.getType()) {
+ default:
+ return true;
+
+ // 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:
+ return false;
+ }
+}
+
const MCSection *TargetLoweringObjectFileMachO::
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang, const TargetMachine &TM) const {
return FourByteConstantSection;
if (Kind.isMergeableConst8())
return EightByteConstantSection;
- if (Kind.isMergeableConst16() && SixteenByteConstantSection)
+ if (Kind.isMergeableConst16())
return SixteenByteConstantSection;
}
return FourByteConstantSection;
if (Kind.isMergeableConst8())
return EightByteConstantSection;
- if (Kind.isMergeableConst16() && SixteenByteConstantSection)
+ if (Kind.isMergeableConst16())
return SixteenByteConstantSection;
return ReadOnlySection; // .const
}
-/// shouldEmitUsedDirectiveFor - This hook allows targets to selectively decide
-/// not to emit the UsedDirective for some symbols in llvm.used.
+/// 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) const {
- /// On Darwin, internally linked data beginning with "L" or "l" does not have
- /// the directive emitted (this occurs in ObjC metadata).
- if (!GV) return false;
-
+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 = getSymbol(GV, Mang);
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
if (Sym->getName()[0] == 'L' || Sym->getName()[0] == 'l')
return false;
}
const MCExpr *TargetLoweringObjectFileMachO::getTTypeGlobalReference(
const GlobalValue *GV, unsigned Encoding, Mangler &Mang,
- MachineModuleInfo *MMI, MCStreamer &Streamer) const {
+ const TargetMachine &TM, MachineModuleInfo *MMI,
+ MCStreamer &Streamer) const {
// The mach-o version of this method defaults to returning a stub reference.
if (Encoding & DW_EH_PE_indirect) {
MachineModuleInfoMachO &MachOMMI =
MMI->getObjFileInfo<MachineModuleInfoMachO>();
- MCSymbol *SSym = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr", Mang);
+ MCSymbol *SSym =
+ getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr", Mang, TM);
// Add information about the stub reference to MachOMMI so that the stub
// gets emitted by the asmprinter.
GV->hasHiddenVisibility() ? MachOMMI.getHiddenGVStubEntry(SSym) :
MachOMMI.getGVStubEntry(SSym);
if (StubSym.getPointer() == 0) {
- MCSymbol *Sym = getSymbol(GV, Mang);
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
}
Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
}
- return TargetLoweringObjectFile::
- getTTypeGlobalReference(GV, Encoding, Mang, MMI, Streamer);
+ return TargetLoweringObjectFile::getTTypeGlobalReference(GV, Encoding, Mang,
+ TM, MMI, Streamer);
}
-MCSymbol *TargetLoweringObjectFileMachO::
-getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
- MachineModuleInfo *MMI) const {
+MCSymbol *TargetLoweringObjectFileMachO::getCFIPersonalitySymbol(
+ const GlobalValue *GV, Mangler &Mang, const TargetMachine &TM,
+ MachineModuleInfo *MMI) const {
// The mach-o version of this method defaults to returning a stub reference.
MachineModuleInfoMachO &MachOMMI =
MMI->getObjFileInfo<MachineModuleInfoMachO>();
- MCSymbol *SSym = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr", Mang);
+ MCSymbol *SSym = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr", Mang, TM);
// 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 = getSymbol(GV, Mang);
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
}
return Flags;
}
-const MCSection *TargetLoweringObjectFileCOFF::
-getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler &Mang, const TargetMachine &TM) const {
+const MCSection *TargetLoweringObjectFileCOFF::getExplicitSectionGlobal(
+ const GlobalValue *GV, SectionKind Kind, Mangler &Mang,
+ const TargetMachine &TM) const {
int Selection = 0;
unsigned Characteristics = getCOFFSectionFlags(Kind);
StringRef Name = GV->getSection();
if (GV->isWeakForLinker()) {
Selection = COFF::IMAGE_COMDAT_SELECT_ANY;
Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
- MCSymbol *Sym = getSymbol(GV, Mang);
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
COMDATSymName = Sym->getName();
}
return getContext().getCOFFSection(Name,
unsigned Characteristics = getCOFFSectionFlags(Kind);
Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
- MCSymbol *Sym = getSymbol(GV, Mang);
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
return getContext().getCOFFSection(Name, Characteristics,
Kind, Sym->getName(),
COFF::IMAGE_COMDAT_SELECT_ANY);
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