//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Function.h"
-#include "llvm/GlobalVariable.h"
-#include "llvm/Module.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Triple.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/GlobalVariable.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/IR/Module.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCSectionMachO.h"
-#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/Target/Mangler.h"
-#include "llvm/DataLayout.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/Triple.h"
+#include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetMachine.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 Mang->getSymbol(GV);
+ return TM.getSymbol(GV, Mang);
case dwarf::DW_EH_PE_pcrel: {
return getContext().GetOrCreateSymbol(StringRef("DW.ref.") +
- Mang->getSymbol(GV)->getName());
+ TM.getSymbol(GV, Mang)->getName());
}
}
}
Flags,
SectionKind::getDataRel(),
0, Label->getName());
- unsigned Size = TM.getDataLayout()->getPointerSize(0);
+ unsigned Size = TM.getDataLayout()->getPointerSize();
Streamer.SwitchSection(Sec);
- Streamer.EmitValueToAlignment(TM.getDataLayout()->getPointerABIAlignment(0));
+ Streamer.EmitValueToAlignment(TM.getDataLayout()->getPointerABIAlignment());
Streamer.EmitSymbolAttribute(Label, MCSA_ELF_TypeObject);
const MCExpr *E = MCConstantExpr::Create(Size, getContext());
Streamer.EmitELFSize(Label, E);
Streamer.EmitSymbolValue(Sym, Size);
}
+const MCExpr *TargetLoweringObjectFileELF::getTTypeGlobalReference(
+ const GlobalValue *GV, unsigned Encoding, Mangler &Mang,
+ 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, 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()) {
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
+ StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
+ }
+
+ return TargetLoweringObjectFile::
+ getTTypeReference(MCSymbolRefExpr::Create(SSym, getContext()),
+ Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
+ }
+
+ return TargetLoweringObjectFile::
+ getTTypeGlobalReference(GV, Encoding, Mang, TM, MMI, Streamer);
+}
+
static SectionKind
getELFKindForNamedSection(StringRef Name, SectionKind K) {
// N.B.: The defaults used in here are no the same ones used in MC.
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.
const MCSection *TargetLoweringObjectFileELF::
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const {
+ Mangler &Mang, const TargetMachine &TM) const {
// If we have -ffunction-section or -fdata-section then we should emit the
// global value to a uniqued section specifically for it.
bool EmitUniquedSection;
Prefix = getSectionPrefixForGlobal(Kind);
SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
- MCSymbol *Sym = Mang->getSymbol(GV);
- 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 MCExpr *TargetLoweringObjectFileELF::
-getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
- MachineModuleInfo *MMI,
- unsigned Encoding, MCStreamer &Streamer) const {
-
- if (Encoding & dwarf::DW_EH_PE_indirect) {
- MachineModuleInfoELF &ELFMMI = MMI->getObjFileInfo<MachineModuleInfoELF>();
-
- SmallString<128> Name;
- Mang->getNameWithPrefix(Name, GV, true);
- Name += ".DW.stub";
-
- // Add information about the stub reference to ELFMMI so that the stub
- // gets emitted by the asmprinter.
- MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str());
- MachineModuleInfoImpl::StubValueTy &StubSym = ELFMMI.getGVStubEntry(SSym);
- if (StubSym.getPointer() == 0) {
- MCSymbol *Sym = Mang->getSymbol(GV);
- StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
- }
-
- return TargetLoweringObjectFile::
- getExprForDwarfReference(SSym, Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
- }
-
- return TargetLoweringObjectFile::
- getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer);
-}
-
const MCSection *
TargetLoweringObjectFileELF::getStaticCtorSection(unsigned Priority) const {
// The default scheme is .ctor / .dtor, so we have to invert the priority
// MachO
//===----------------------------------------------------------------------===//
-/// emitModuleFlags - Emit the module flags that specify the garbage collection
-/// information.
+/// getDepLibFromLinkerOpt - Extract the dependent library name from a linker
+/// option string. Returns StringRef() if the option does not specify a library.
+StringRef TargetLoweringObjectFileMachO::
+getDepLibFromLinkerOpt(StringRef LinkerOption) const {
+ const char *LibCmd = "-l";
+ if (LinkerOption.startswith(LibCmd))
+ return LinkerOption.substr(strlen(LibCmd));
+ return StringRef();
+}
+
+/// emitModuleFlags - Perform code emission for module flags.
void TargetLoweringObjectFileMachO::
emitModuleFlags(MCStreamer &Streamer,
ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
- Mangler *Mang, const TargetMachine &TM) const {
+ Mangler &Mang, const TargetMachine &TM) const {
unsigned VersionVal = 0;
unsigned ImageInfoFlags = 0;
+ MDNode *LinkerOptions = nullptr;
StringRef SectionVal;
for (ArrayRef<Module::ModuleFlagEntry>::iterator
StringRef Key = MFE.Key->getString();
Value *Val = MFE.Val;
- if (Key == "Objective-C Image Info Version")
+ if (Key == "Objective-C Image Info Version") {
VersionVal = cast<ConstantInt>(Val)->getZExtValue();
- else if (Key == "Objective-C Garbage Collection" ||
- Key == "Objective-C GC Only" ||
- Key == "Objective-C Is Simulated")
+ } else if (Key == "Objective-C Garbage Collection" ||
+ Key == "Objective-C GC Only" ||
+ Key == "Objective-C Is Simulated") {
ImageInfoFlags |= cast<ConstantInt>(Val)->getZExtValue();
- else if (Key == "Objective-C Image Info Section")
+ } else if (Key == "Objective-C Image Info Section") {
SectionVal = cast<MDString>(Val)->getString();
+ } else if (Key == "Linker Options") {
+ LinkerOptions = cast<MDNode>(Val);
+ }
+ }
+
+ // Emit the linker options if present.
+ if (LinkerOptions) {
+ for (unsigned i = 0, e = LinkerOptions->getNumOperands(); i != e; ++i) {
+ MDNode *MDOptions = cast<MDNode>(LinkerOptions->getOperand(i));
+ SmallVector<std::string, 4> StrOptions;
+
+ // Convert to strings.
+ for (unsigned ii = 0, ie = MDOptions->getNumOperands(); ii != ie; ++ii) {
+ MDString *MDOption = cast<MDString>(MDOptions->getOperand(ii));
+ StrOptions.push_back(MDOption->getString());
+ }
+
+ Streamer.EmitLinkerOptions(StrOptions);
+ }
}
// The section is mandatory. If we don't have it, then we don't have GC info.
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 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;
+ }
+}
+
const MCSection *TargetLoweringObjectFileMachO::
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const {
+ Mangler &Mang, const TargetMachine &TM) const {
// Handle thread local data.
if (Kind.isThreadBSS()) return TLSBSSSection;
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.
-// 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;
-
- // 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 = Mang->getSymbol(GV);
- if (Sym->getName()[0] == 'L' || Sym->getName()[0] == 'l')
- return false;
- }
-
- return true;
-}
-
-const MCExpr *TargetLoweringObjectFileMachO::
-getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
- MachineModuleInfo *MMI, unsigned Encoding,
- MCStreamer &Streamer) const {
+const MCExpr *TargetLoweringObjectFileMachO::getTTypeGlobalReference(
+ const GlobalValue *GV, unsigned Encoding, Mangler &Mang,
+ 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>();
- SmallString<128> Name;
- Mang->getNameWithPrefix(Name, GV, true);
- Name += "$non_lazy_ptr";
+ MCSymbol *SSym =
+ getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr", Mang, TM);
// Add information about the stub reference to MachOMMI so that the stub
// gets emitted by the asmprinter.
- MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str());
MachineModuleInfoImpl::StubValueTy &StubSym =
GV->hasHiddenVisibility() ? MachOMMI.getHiddenGVStubEntry(SSym) :
MachOMMI.getGVStubEntry(SSym);
- if (StubSym.getPointer() == 0) {
- MCSymbol *Sym = Mang->getSymbol(GV);
+ if (!StubSym.getPointer()) {
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
}
return TargetLoweringObjectFile::
- getExprForDwarfReference(SSym, Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
+ getTTypeReference(MCSymbolRefExpr::Create(SSym, getContext()),
+ Encoding & ~dwarf::DW_EH_PE_indirect, Streamer);
}
- return TargetLoweringObjectFile::
- getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, 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>();
- SmallString<128> Name;
- Mang->getNameWithPrefix(Name, GV, true);
- Name += "$non_lazy_ptr";
+ MCSymbol *SSym = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr", Mang, TM);
// Add information about the stub reference to MachOMMI so that the stub
// gets emitted by the asmprinter.
- MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str());
MachineModuleInfoImpl::StubValueTy &StubSym = MachOMMI.getGVStubEntry(SSym);
- if (StubSym.getPointer() == 0) {
- MCSymbol *Sym = Mang->getSymbol(GV);
+ if (!StubSym.getPointer()) {
+ 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 {
- return getContext().getCOFFSection(GV->getSection(),
- getCOFFSectionFlags(Kind),
- Kind);
+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();
+ StringRef COMDATSymName = "";
+ if (GV->isWeakForLinker()) {
+ Selection = COFF::IMAGE_COMDAT_SELECT_ANY;
+ Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
+ MCSymbol *Sym = TM.getSymbol(GV, Mang);
+ COMDATSymName = Sym->getName();
+ }
+ return getContext().getCOFFSection(Name,
+ Characteristics,
+ Kind,
+ COMDATSymName,
+ Selection);
}
-static const char *getCOFFSectionPrefixForUniqueGlobal(SectionKind Kind) {
+static const char *getCOFFSectionNameForUniqueGlobal(SectionKind Kind) {
if (Kind.isText())
- return ".text$";
- if (Kind.isBSS ())
- return ".bss$";
+ return ".text";
+ if (Kind.isBSS())
+ return ".bss";
if (Kind.isThreadLocal())
return ".tls$";
if (Kind.isWriteable())
- return ".data$";
- return ".rdata$";
+ return ".data";
+ return ".rdata";
}
const MCSection *TargetLoweringObjectFileCOFF::
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
- Mangler *Mang, const TargetMachine &TM) const {
+ 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()) {
- const char *Prefix = getCOFFSectionPrefixForUniqueGlobal(Kind);
- SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
- MCSymbol *Sym = Mang->getSymbol(GV);
- Name.append(Sym->getName().begin() + 1, Sym->getName().end());
-
+ // 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;
-
- return getContext().getCOFFSection(Name.str(), Characteristics,
- COFF::IMAGE_COMDAT_SELECT_ANY, Kind);
+ 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())
- return getTextSection();
+ return TextSection;
if (Kind.isThreadLocal())
- return getTLSDataSection();
+ return TLSDataSection;
+
+ if (Kind.isReadOnly())
+ return ReadOnlySection;
+
+ // 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 getDataSection();
+ return DataSection;
}
+StringRef TargetLoweringObjectFileCOFF::
+getDepLibFromLinkerOpt(StringRef LinkerOption) const {
+ const char *LibCmd = "/DEFAULTLIB:";
+ if (LinkerOption.startswith(LibCmd))
+ return LinkerOption.substr(strlen(LibCmd));
+ return StringRef();
+}
+
+void TargetLoweringObjectFileCOFF::
+emitModuleFlags(MCStreamer &Streamer,
+ ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
+ Mangler &Mang, const TargetMachine &TM) const {
+ MDNode *LinkerOptions = nullptr;
+
+ // Look for the "Linker Options" flag, since it's the only one we support.
+ for (ArrayRef<Module::ModuleFlagEntry>::iterator
+ i = ModuleFlags.begin(), e = ModuleFlags.end(); i != e; ++i) {
+ const Module::ModuleFlagEntry &MFE = *i;
+ StringRef Key = MFE.Key->getString();
+ Value *Val = MFE.Val;
+ if (Key == "Linker Options") {
+ LinkerOptions = cast<MDNode>(Val);
+ break;
+ }
+ }
+ if (!LinkerOptions)
+ return;
+
+ // Emit the linker options to the linker .drectve section. According to the
+ // spec, this section is a space-separated string containing flags for linker.
+ const MCSection *Sec = getDrectveSection();
+ Streamer.SwitchSection(Sec);
+ for (unsigned i = 0, e = LinkerOptions->getNumOperands(); i != e; ++i) {
+ MDNode *MDOptions = cast<MDNode>(LinkerOptions->getOperand(i));
+ for (unsigned ii = 0, ie = MDOptions->getNumOperands(); ii != ie; ++ii) {
+ MDString *MDOption = cast<MDString>(MDOptions->getOperand(ii));
+ StringRef Op = MDOption->getString();
+ // Lead with a space for consistency with our dllexport implementation.
+ std::string Escaped(" ");
+ if (Op.find(" ") != StringRef::npos) {
+ // The PE-COFF spec says args with spaces must be quoted. It doesn't say
+ // how to escape quotes, but it probably uses this algorithm:
+ // http://msdn.microsoft.com/en-us/library/17w5ykft(v=vs.85).aspx
+ // FIXME: Reuse escaping code from Support/Windows/Program.inc
+ Escaped.push_back('\"');
+ Escaped.append(Op);
+ Escaped.push_back('\"');
+ } else {
+ Escaped.append(Op);
+ }
+ Streamer.EmitBytes(Escaped);
+ }
+ }
+}
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