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-rw-r--r--contrib/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp144
1 files changed, 82 insertions, 62 deletions
diff --git a/contrib/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/contrib/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index 58ae9cc..5f814c9 100644
--- a/contrib/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/contrib/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -33,6 +33,7 @@
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbolELF.h"
#include "llvm/MC/MCValue.h"
+#include "llvm/ProfileData/InstrProf.h"
#include "llvm/Support/COFF.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/ELF.h"
@@ -68,11 +69,9 @@ void TargetLoweringObjectFileELF::emitPersonalityValue(
cast<MCSymbolELF>(getContext().getOrCreateSymbol(NameData));
Streamer.EmitSymbolAttribute(Label, MCSA_Hidden);
Streamer.EmitSymbolAttribute(Label, MCSA_Weak);
- StringRef Prefix = ".data.";
- NameData.insert(NameData.begin(), Prefix.begin(), Prefix.end());
unsigned Flags = ELF::SHF_ALLOC | ELF::SHF_WRITE | ELF::SHF_GROUP;
- MCSection *Sec = getContext().getELFSection(NameData, ELF::SHT_PROGBITS,
- Flags, 0, Label->getName());
+ MCSection *Sec = getContext().getELFNamedSection(".data", Label->getName(),
+ ELF::SHT_PROGBITS, Flags, 0);
unsigned Size = DL.getPointerSize();
Streamer.SwitchSection(Sec);
Streamer.EmitValueToAlignment(DL.getPointerABIAlignment());
@@ -119,6 +118,10 @@ getELFKindForNamedSection(StringRef Name, SectionKind K) {
// section(".eh_frame") gcc will produce:
//
// .section .eh_frame,"a",@progbits
+
+ if (Name == getInstrProfCoverageSectionName(false))
+ return SectionKind::getMetadata();
+
if (Name.empty() || Name[0] != '.') return K;
// Some lame default implementation based on some magic section names.
@@ -259,9 +262,11 @@ selectELFSectionForGlobal(MCContext &Ctx, const GlobalValue *GV,
EntrySize = 4;
} else if (Kind.isMergeableConst8()) {
EntrySize = 8;
- } else {
- assert(Kind.isMergeableConst16() && "unknown data width");
+ } else if (Kind.isMergeableConst16()) {
EntrySize = 16;
+ } else {
+ assert(Kind.isMergeableConst32() && "unknown data width");
+ EntrySize = 32;
}
}
@@ -288,12 +293,14 @@ selectELFSectionForGlobal(MCContext &Ctx, const GlobalValue *GV,
} else {
Name = getSectionPrefixForGlobal(Kind);
}
+ // FIXME: Extend the section prefix to include hotness catagories such as .hot
+ // or .unlikely for functions.
if (EmitUniqueSection && UniqueSectionNames) {
Name.push_back('.');
TM.getNameWithPrefix(Name, GV, Mang, true);
}
- unsigned UniqueID = ~0;
+ unsigned UniqueID = MCContext::GenericSectionID;
if (EmitUniqueSection && !UniqueSectionNames) {
UniqueID = *NextUniqueID;
(*NextUniqueID)++;
@@ -346,13 +353,16 @@ bool TargetLoweringObjectFileELF::shouldPutJumpTableInFunctionSection(
/// Given a mergeable constant with the specified size and relocation
/// information, return a section that it should be placed in.
MCSection *TargetLoweringObjectFileELF::getSectionForConstant(
- const DataLayout &DL, SectionKind Kind, const Constant *C) const {
+ const DataLayout &DL, SectionKind Kind, const Constant *C,
+ unsigned &Align) const {
if (Kind.isMergeableConst4() && MergeableConst4Section)
return MergeableConst4Section;
if (Kind.isMergeableConst8() && MergeableConst8Section)
return MergeableConst8Section;
if (Kind.isMergeableConst16() && MergeableConst16Section)
return MergeableConst16Section;
+ if (Kind.isMergeableConst32() && MergeableConst32Section)
+ return MergeableConst32Section;
if (Kind.isReadOnly())
return ReadOnlySection;
@@ -412,6 +422,27 @@ MCSection *TargetLoweringObjectFileELF::getStaticDtorSection(
KeySym);
}
+const MCExpr *TargetLoweringObjectFileELF::lowerRelativeReference(
+ const GlobalValue *LHS, const GlobalValue *RHS, Mangler &Mang,
+ const TargetMachine &TM) const {
+ // We may only use a PLT-relative relocation to refer to unnamed_addr
+ // functions.
+ if (!LHS->hasGlobalUnnamedAddr() || !LHS->getValueType()->isFunctionTy())
+ return nullptr;
+
+ // Basic sanity checks.
+ if (LHS->getType()->getPointerAddressSpace() != 0 ||
+ RHS->getType()->getPointerAddressSpace() != 0 || LHS->isThreadLocal() ||
+ RHS->isThreadLocal())
+ return nullptr;
+
+ return MCBinaryExpr::createSub(
+ MCSymbolRefExpr::create(TM.getSymbol(LHS, Mang), PLTRelativeVariantKind,
+ getContext()),
+ MCSymbolRefExpr::create(TM.getSymbol(RHS, Mang), getContext()),
+ getContext());
+}
+
void
TargetLoweringObjectFileELF::InitializeELF(bool UseInitArray_) {
UseInitArray = UseInitArray_;
@@ -443,10 +474,7 @@ emitModuleFlags(MCStreamer &Streamer,
MDNode *LinkerOptions = nullptr;
StringRef SectionVal;
- for (ArrayRef<Module::ModuleFlagEntry>::iterator
- i = ModuleFlags.begin(), e = ModuleFlags.end(); i != e; ++i) {
- const Module::ModuleFlagEntry &MFE = *i;
-
+ for (const auto &MFE : ModuleFlags) {
// Ignore flags with 'Require' behavior.
if (MFE.Behavior == Module::Require)
continue;
@@ -459,6 +487,7 @@ emitModuleFlags(MCStreamer &Streamer,
} else if (Key == "Objective-C Garbage Collection" ||
Key == "Objective-C GC Only" ||
Key == "Objective-C Is Simulated" ||
+ Key == "Objective-C Class Properties" ||
Key == "Objective-C Image Swift Version") {
ImageInfoFlags |= mdconst::extract<ConstantInt>(Val)->getZExtValue();
} else if (Key == "Objective-C Image Info Section") {
@@ -470,16 +499,10 @@ emitModuleFlags(MCStreamer &Streamer,
// 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));
+ for (const auto &Option : LinkerOptions->operands()) {
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());
- }
-
+ for (const auto &Piece : cast<MDNode>(Option)->operands())
+ StrOptions.push_back(cast<MDString>(Piece)->getString());
Streamer.EmitLinkerOptions(StrOptions);
}
}
@@ -630,7 +653,8 @@ MCSection *TargetLoweringObjectFileMachO::SelectSectionForGlobal(
}
MCSection *TargetLoweringObjectFileMachO::getSectionForConstant(
- const DataLayout &DL, SectionKind Kind, const Constant *C) const {
+ const DataLayout &DL, SectionKind Kind, const Constant *C,
+ unsigned &Align) const {
// If this constant requires a relocation, we have to put it in the data
// segment, not in the text segment.
if (Kind.isData() || Kind.isReadOnlyWithRel())
@@ -660,9 +684,7 @@ const MCExpr *TargetLoweringObjectFileMachO::getTTypeGlobalReference(
// Add information about the stub reference to MachOMMI so that the stub
// gets emitted by the asmprinter.
- MachineModuleInfoImpl::StubValueTy &StubSym =
- GV->hasHiddenVisibility() ? MachOMMI.getHiddenGVStubEntry(SSym) :
- MachOMMI.getGVStubEntry(SSym);
+ MachineModuleInfoImpl::StubValueTy &StubSym = MachOMMI.getGVStubEntry(SSym);
if (!StubSym.getPointer()) {
MCSymbol *Sym = TM.getSymbol(GV, Mang);
StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
@@ -785,8 +807,9 @@ void TargetLoweringObjectFileMachO::getNameWithPrefix(
//===----------------------------------------------------------------------===//
static unsigned
-getCOFFSectionFlags(SectionKind K) {
+getCOFFSectionFlags(SectionKind K, const TargetMachine &TM) {
unsigned Flags = 0;
+ bool isThumb = TM.getTargetTriple().getArch() == Triple::thumb;
if (K.isMetadata())
Flags |=
@@ -795,7 +818,8 @@ getCOFFSectionFlags(SectionKind K) {
Flags |=
COFF::IMAGE_SCN_MEM_EXECUTE |
COFF::IMAGE_SCN_MEM_READ |
- COFF::IMAGE_SCN_CNT_CODE;
+ COFF::IMAGE_SCN_CNT_CODE |
+ (isThumb ? COFF::IMAGE_SCN_MEM_16BIT : (COFF::SectionCharacteristics)0);
else if (K.isBSS())
Flags |=
COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
@@ -865,7 +889,7 @@ MCSection *TargetLoweringObjectFileCOFF::getExplicitSectionGlobal(
const GlobalValue *GV, SectionKind Kind, Mangler &Mang,
const TargetMachine &TM) const {
int Selection = 0;
- unsigned Characteristics = getCOFFSectionFlags(Kind);
+ unsigned Characteristics = getCOFFSectionFlags(Kind, TM);
StringRef Name = GV->getSection();
StringRef COMDATSymName = "";
if (GV->hasComdat()) {
@@ -884,10 +908,8 @@ MCSection *TargetLoweringObjectFileCOFF::getExplicitSectionGlobal(
Selection = 0;
}
}
- return getContext().getCOFFSection(Name,
- Characteristics,
- Kind,
- COMDATSymName,
+
+ return getContext().getCOFFSection(Name, Characteristics, Kind, COMDATSymName,
Selection);
}
@@ -916,7 +938,7 @@ MCSection *TargetLoweringObjectFileCOFF::SelectSectionForGlobal(
if ((EmitUniquedSection && !Kind.isCommon()) || GV->hasComdat()) {
const char *Name = getCOFFSectionNameForUniqueGlobal(Kind);
- unsigned Characteristics = getCOFFSectionFlags(Kind);
+ unsigned Characteristics = getCOFFSectionFlags(Kind, TM);
Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
int Selection = getSelectionForCOFF(GV);
@@ -928,16 +950,20 @@ MCSection *TargetLoweringObjectFileCOFF::SelectSectionForGlobal(
else
ComdatGV = GV;
+ unsigned UniqueID = MCContext::GenericSectionID;
+ if (EmitUniquedSection)
+ UniqueID = NextUniqueID++;
+
if (!ComdatGV->hasPrivateLinkage()) {
MCSymbol *Sym = TM.getSymbol(ComdatGV, Mang);
StringRef COMDATSymName = Sym->getName();
return getContext().getCOFFSection(Name, Characteristics, Kind,
- COMDATSymName, Selection);
+ COMDATSymName, Selection, UniqueID);
} else {
SmallString<256> TmpData;
Mang.getNameWithPrefix(TmpData, GV, /*CannotUsePrivateLabel=*/true);
return getContext().getCOFFSection(Name, Characteristics, Kind, TmpData,
- Selection);
+ Selection, UniqueID);
}
}
@@ -989,11 +1015,12 @@ MCSection *TargetLoweringObjectFileCOFF::getSectionForJumpTable(
SectionKind Kind = SectionKind::getReadOnly();
const char *Name = getCOFFSectionNameForUniqueGlobal(Kind);
- unsigned Characteristics = getCOFFSectionFlags(Kind);
+ unsigned Characteristics = getCOFFSectionFlags(Kind, TM);
Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
+ unsigned UniqueID = NextUniqueID++;
return getContext().getCOFFSection(Name, Characteristics, Kind, COMDATSymName,
- COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE);
+ COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE, UniqueID);
}
void TargetLoweringObjectFileCOFF::
@@ -1002,32 +1029,25 @@ emitModuleFlags(MCStreamer &Streamer,
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;
+ for (const auto &MFE : ModuleFlags) {
StringRef Key = MFE.Key->getString();
- Metadata *Val = MFE.Val;
- if (Key == "Linker Options") {
- LinkerOptions = cast<MDNode>(Val);
- break;
- }
+ if (Key == "Linker Options")
+ LinkerOptions = cast<MDNode>(MFE.Val);
}
- 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.
- 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));
- // Lead with a space for consistency with our dllexport implementation.
- std::string Directive(" ");
- Directive.append(MDOption->getString());
- Streamer.EmitBytes(Directive);
+ if (LinkerOptions) {
+ // Emit the linker options to the linker .drectve section. According to the
+ // spec, this section is a space-separated string containing flags for
+ // linker.
+ MCSection *Sec = getDrectveSection();
+ Streamer.SwitchSection(Sec);
+ for (const auto &Option : LinkerOptions->operands()) {
+ for (const auto &Piece : cast<MDNode>(Option)->operands()) {
+ // Lead with a space for consistency with our dllexport implementation.
+ std::string Directive(" ");
+ Directive.append(cast<MDString>(Piece)->getString());
+ Streamer.EmitBytes(Directive);
+ }
}
}
}
@@ -1035,13 +1055,13 @@ emitModuleFlags(MCStreamer &Streamer,
MCSection *TargetLoweringObjectFileCOFF::getStaticCtorSection(
unsigned Priority, const MCSymbol *KeySym) const {
return getContext().getAssociativeCOFFSection(
- cast<MCSectionCOFF>(StaticCtorSection), KeySym);
+ cast<MCSectionCOFF>(StaticCtorSection), KeySym, 0);
}
MCSection *TargetLoweringObjectFileCOFF::getStaticDtorSection(
unsigned Priority, const MCSymbol *KeySym) const {
return getContext().getAssociativeCOFFSection(
- cast<MCSectionCOFF>(StaticDtorSection), KeySym);
+ cast<MCSectionCOFF>(StaticDtorSection), KeySym, 0);
}
void TargetLoweringObjectFileCOFF::emitLinkerFlagsForGlobal(
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