#include "llvm/CodeGen/AsmPrinter.h"
#include "DwarfDebug.h"
#include "DwarfException.h"
-#include "Win64Exception.h"
+#include "WinException.h"
#include "WinCodeViewLineTables.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/ConstantFolding.h"
-#include "llvm/Analysis/JumpInstrTableInfo.h"
#include "llvm/CodeGen/Analysis.h"
#include "llvm/CodeGen/GCMetadataPrinter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineInstrBundle.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Mangler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCSymbolELF.h"
+#include "llvm/MC/MCValue.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/Timer.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetInstrInfo.h"
/// getGVAlignmentLog2 - Return the alignment to use for the specified global
/// value in log2 form. This rounds up to the preferred alignment if possible
/// and legal.
-static unsigned getGVAlignmentLog2(const GlobalValue *GV, const DataLayout &TD,
+static unsigned getGVAlignmentLog2(const GlobalValue *GV, const DataLayout &DL,
unsigned InBits = 0) {
unsigned NumBits = 0;
if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV))
- NumBits = TD.getPreferredAlignmentLog(GVar);
+ NumBits = DL.getPreferredAlignmentLog(GVar);
// If InBits is specified, round it to it.
if (InBits > NumBits)
AsmPrinter::AsmPrinter(TargetMachine &tm, std::unique_ptr<MCStreamer> Streamer)
: MachineFunctionPass(ID), TM(tm), MAI(tm.getMCAsmInfo()),
- MII(tm.getSubtargetImpl()->getInstrInfo()),
- OutContext(Streamer->getContext()), OutStreamer(*Streamer.release()),
- LastMI(nullptr), LastFn(0), Counter(~0U), SetCounter(0) {
- DD = nullptr; MMI = nullptr; LI = nullptr; MF = nullptr;
- CurrentFnSym = CurrentFnSymForSize = nullptr;
+ OutContext(Streamer->getContext()), OutStreamer(std::move(Streamer)),
+ LastMI(nullptr), LastFn(0), Counter(~0U) {
+ DD = nullptr;
+ MMI = nullptr;
+ LI = nullptr;
+ MF = nullptr;
+ CurExceptionSym = CurrentFnSym = CurrentFnSymForSize = nullptr;
+ CurrentFnBegin = nullptr;
+ CurrentFnEnd = nullptr;
GCMetadataPrinters = nullptr;
- VerboseAsm = OutStreamer.isVerboseAsm();
+ VerboseAsm = OutStreamer->isVerboseAsm();
}
AsmPrinter::~AsmPrinter() {
delete &GCMap;
GCMetadataPrinters = nullptr;
}
-
- delete &OutStreamer;
}
/// getFunctionNumber - Return a unique ID for the current function.
return *TM.getObjFileLowering();
}
-/// getDataLayout - Return information about data layout.
const DataLayout &AsmPrinter::getDataLayout() const {
- return *TM.getDataLayout();
+ return MMI->getModule()->getDataLayout();
}
+// Do not use the cached DataLayout because some client use it without a Module
+// (llmv-dsymutil, llvm-dwarfdump).
+unsigned AsmPrinter::getPointerSize() const { return TM.getPointerSize(); }
+
const MCSubtargetInfo &AsmPrinter::getSubtargetInfo() const {
- return TM.getSubtarget<MCSubtargetInfo>();
+ assert(MF && "getSubtargetInfo requires a valid MachineFunction!");
+ return MF->getSubtarget<MCSubtargetInfo>();
}
void AsmPrinter::EmitToStreamer(MCStreamer &S, const MCInst &Inst) {
}
StringRef AsmPrinter::getTargetTriple() const {
- return TM.getTargetTriple();
+ return TM.getTargetTriple().str();
}
/// getCurrentSection() - Return the current section we are emitting to.
const MCSection *AsmPrinter::getCurrentSection() const {
- return OutStreamer.getCurrentSection().first;
+ return OutStreamer->getCurrentSection().first;
}
bool AsmPrinter::doInitialization(Module &M) {
MMI = getAnalysisIfAvailable<MachineModuleInfo>();
- MMI->AnalyzeModule(M);
// Initialize TargetLoweringObjectFile.
const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
.Initialize(OutContext, TM);
- OutStreamer.InitSections(false);
+ OutStreamer->InitSections(false);
- Mang = new Mangler(TM.getDataLayout());
+ Mang = new Mangler();
// Emit the version-min deplyment target directive if needed.
//
// use the directive, where it would need the same conditionalization
// anyway.
Triple TT(getTargetTriple());
- if (TT.isOSDarwin()) {
+ // If there is a version specified, Major will be non-zero.
+ if (TT.isOSDarwin() && TT.getOSMajorVersion() != 0) {
unsigned Major, Minor, Update;
- TT.getOSVersion(Major, Minor, Update);
- // If there is a version specified, Major will be non-zero.
- if (Major)
- OutStreamer.EmitVersionMin((TT.isMacOSX() ?
- MCVM_OSXVersionMin : MCVM_IOSVersionMin),
- Major, Minor, Update);
+ MCVersionMinType VersionType;
+ if (TT.isWatchOS()) {
+ VersionType = MCVM_WatchOSVersionMin;
+ TT.getWatchOSVersion(Major, Minor, Update);
+ } else if (TT.isTvOS()) {
+ VersionType = MCVM_TvOSVersionMin;
+ TT.getiOSVersion(Major, Minor, Update);
+ } else if (TT.isMacOSX()) {
+ VersionType = MCVM_OSXVersionMin;
+ if (!TT.getMacOSXVersion(Major, Minor, Update))
+ Major = 0;
+ } else {
+ VersionType = MCVM_IOSVersionMin;
+ TT.getiOSVersion(Major, Minor, Update);
+ }
+ if (Major != 0)
+ OutStreamer->EmitVersionMin(VersionType, Major, Minor, Update);
}
// Allow the target to emit any magic that it wants at the start of the file.
// don't, this at least helps the user find where a global came from.
if (MAI->hasSingleParameterDotFile()) {
// .file "foo.c"
- OutStreamer.EmitFileDirective(M.getModuleIdentifier());
+ OutStreamer->EmitFileDirective(M.getModuleIdentifier());
}
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
// Emit module-level inline asm if it exists.
if (!M.getModuleInlineAsm().empty()) {
- OutStreamer.AddComment("Start of file scope inline assembly");
- OutStreamer.AddBlankLine();
- EmitInlineAsm(M.getModuleInlineAsm()+"\n");
- OutStreamer.AddComment("End of file scope inline assembly");
- OutStreamer.AddBlankLine();
+ // We're at the module level. Construct MCSubtarget from the default CPU
+ // and target triple.
+ std::unique_ptr<MCSubtargetInfo> STI(TM.getTarget().createMCSubtargetInfo(
+ TM.getTargetTriple().str(), TM.getTargetCPU(),
+ TM.getTargetFeatureString()));
+ OutStreamer->AddComment("Start of file scope inline assembly");
+ OutStreamer->AddBlankLine();
+ EmitInlineAsm(M.getModuleInlineAsm()+"\n",
+ OutContext.getSubtargetCopy(*STI), TM.Options.MCOptions);
+ OutStreamer->AddComment("End of file scope inline assembly");
+ OutStreamer->AddBlankLine();
}
if (MAI->doesSupportDebugInformation()) {
- bool skip_dwarf = false;
- if (Triple(TM.getTargetTriple()).isKnownWindowsMSVCEnvironment()) {
+ bool EmitCodeView = MMI->getModule()->getCodeViewFlag();
+ if (EmitCodeView && TM.getTargetTriple().isKnownWindowsMSVCEnvironment()) {
Handlers.push_back(HandlerInfo(new WinCodeViewLineTables(this),
DbgTimerName,
CodeViewLineTablesGroupName));
- // FIXME: Don't emit DWARF debug info if there's at least one function
- // with AddressSanitizer instrumentation.
- // This is a band-aid fix for PR22032.
- for (auto &F : M.functions()) {
- if (F.hasFnAttribute(Attribute::SanitizeAddress)) {
- skip_dwarf = true;
- break;
- }
- }
}
- if (!skip_dwarf) {
+ if (!EmitCodeView || MMI->getModule()->getDwarfVersion()) {
DD = new DwarfDebug(this, &M);
Handlers.push_back(HandlerInfo(DD, DbgTimerName, DWARFGroupName));
}
case ExceptionHandling::WinEH:
switch (MAI->getWinEHEncodingType()) {
default: llvm_unreachable("unsupported unwinding information encoding");
+ case WinEH::EncodingType::Invalid:
+ break;
+ case WinEH::EncodingType::X86:
case WinEH::EncodingType::Itanium:
- ES = new Win64Exception(this);
+ ES = new WinException(this);
break;
}
break;
case GlobalValue::WeakODRLinkage:
if (MAI->hasWeakDefDirective()) {
// .globl _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Global);
if (!canBeHidden(GV, *MAI))
// .weak_definition _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition);
+ OutStreamer->EmitSymbolAttribute(GVSym, MCSA_WeakDefinition);
else
- OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefAutoPrivate);
+ OutStreamer->EmitSymbolAttribute(GVSym, MCSA_WeakDefAutoPrivate);
} else if (MAI->hasLinkOnceDirective()) {
// .globl _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Global);
//NOTE: linkonce is handled by the section the symbol was assigned to.
} else {
// .weak _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak);
+ OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Weak);
}
return;
case GlobalValue::AppendingLinkage:
case GlobalValue::ExternalLinkage:
// If external or appending, declare as a global symbol.
// .globl _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Global);
return;
case GlobalValue::PrivateLinkage:
case GlobalValue::InternalLinkage:
return TM.getSymbol(GV, *Mang);
}
+static MCSymbol *getOrCreateEmuTLSControlSym(MCSymbol *GVSym, MCContext &C) {
+ return C.getOrCreateSymbol(Twine("__emutls_v.") + GVSym->getName());
+}
+
+static MCSymbol *getOrCreateEmuTLSInitSym(MCSymbol *GVSym, MCContext &C) {
+ return C.getOrCreateSymbol(Twine("__emutls_t.") + GVSym->getName());
+}
+
+/// EmitEmulatedTLSControlVariable - Emit the control variable for an emulated TLS variable.
+void AsmPrinter::EmitEmulatedTLSControlVariable(const GlobalVariable *GV,
+ MCSymbol *EmittedSym,
+ bool AllZeroInitValue) {
+ MCSection *TLSVarSection = getObjFileLowering().getDataSection();
+ OutStreamer->SwitchSection(TLSVarSection);
+ MCSymbol *GVSym = getSymbol(GV);
+ EmitLinkage(GV, EmittedSym); // same linkage as GV
+ const DataLayout &DL = GV->getParent()->getDataLayout();
+ uint64_t Size = DL.getTypeAllocSize(GV->getType()->getElementType());
+ unsigned AlignLog = getGVAlignmentLog2(GV, DL);
+ unsigned WordSize = DL.getPointerSize();
+ unsigned Alignment = DL.getPointerABIAlignment();
+ EmitAlignment(Log2_32(Alignment));
+ OutStreamer->EmitLabel(EmittedSym);
+ OutStreamer->EmitIntValue(Size, WordSize);
+ OutStreamer->EmitIntValue((1 << AlignLog), WordSize);
+ OutStreamer->EmitIntValue(0, WordSize);
+ if (GV->hasInitializer() && !AllZeroInitValue) {
+ OutStreamer->EmitSymbolValue(
+ getOrCreateEmuTLSInitSym(GVSym, OutContext), WordSize);
+ } else
+ OutStreamer->EmitIntValue(0, WordSize);
+ if (MAI->hasDotTypeDotSizeDirective())
+ OutStreamer->emitELFSize(cast<MCSymbolELF>(EmittedSym),
+ MCConstantExpr::create(4 * WordSize, OutContext));
+ OutStreamer->AddBlankLine(); // End of the __emutls_v.* variable.
+}
+
/// EmitGlobalVariable - Emit the specified global variable to the .s file.
void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
+ bool IsEmuTLSVar =
+ GV->getThreadLocalMode() != llvm::GlobalVariable::NotThreadLocal &&
+ TM.Options.EmulatedTLS;
+ assert(!(IsEmuTLSVar && GV->hasCommonLinkage()) &&
+ "No emulated TLS variables in the common section");
+
if (GV->hasInitializer()) {
// Check to see if this is a special global used by LLVM, if so, emit it.
if (EmitSpecialLLVMGlobal(GV))
return;
- if (isVerbose()) {
- GV->printAsOperand(OutStreamer.GetCommentOS(),
+ // Skip the emission of global equivalents. The symbol can be emitted later
+ // on by emitGlobalGOTEquivs in case it turns out to be needed.
+ if (GlobalGOTEquivs.count(getSymbol(GV)))
+ return;
+
+ if (isVerbose() && !IsEmuTLSVar) {
+ // When printing the control variable __emutls_v.*,
+ // we don't need to print the original TLS variable name.
+ GV->printAsOperand(OutStreamer->GetCommentOS(),
/*PrintType=*/false, GV->getParent());
- OutStreamer.GetCommentOS() << '\n';
+ OutStreamer->GetCommentOS() << '\n';
}
}
MCSymbol *GVSym = getSymbol(GV);
- EmitVisibility(GVSym, GV->getVisibility(), !GV->isDeclaration());
+ MCSymbol *EmittedSym = IsEmuTLSVar ?
+ getOrCreateEmuTLSControlSym(GVSym, OutContext) : GVSym;
+ // getOrCreateEmuTLSControlSym only creates the symbol with name and default attributes.
+ // GV's or GVSym's attributes will be used for the EmittedSym.
+
+ EmitVisibility(EmittedSym, GV->getVisibility(), !GV->isDeclaration());
if (!GV->hasInitializer()) // External globals require no extra code.
return;
"' is already defined");
if (MAI->hasDotTypeDotSizeDirective())
- OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject);
+ OutStreamer->EmitSymbolAttribute(EmittedSym, MCSA_ELF_TypeObject);
SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM);
- const DataLayout *DL = TM.getDataLayout();
- uint64_t Size = DL->getTypeAllocSize(GV->getType()->getElementType());
+ const DataLayout &DL = GV->getParent()->getDataLayout();
+ uint64_t Size = DL.getTypeAllocSize(GV->getType()->getElementType());
// If the alignment is specified, we *must* obey it. Overaligning a global
// with a specified alignment is a prompt way to break globals emitted to
// sections and expected to be contiguous (e.g. ObjC metadata).
- unsigned AlignLog = getGVAlignmentLog2(GV, *DL);
+ unsigned AlignLog = getGVAlignmentLog2(GV, DL);
+
+ bool AllZeroInitValue = false;
+ const Constant *InitValue = GV->getInitializer();
+ if (isa<ConstantAggregateZero>(InitValue))
+ AllZeroInitValue = true;
+ else {
+ const ConstantInt *InitIntValue = dyn_cast<ConstantInt>(InitValue);
+ if (InitIntValue && InitIntValue->isZero())
+ AllZeroInitValue = true;
+ }
+ if (IsEmuTLSVar)
+ EmitEmulatedTLSControlVariable(GV, EmittedSym, AllZeroInitValue);
for (const HandlerInfo &HI : Handlers) {
NamedRegionTimer T(HI.TimerName, HI.TimerGroupName, TimePassesIsEnabled);
// Handle common and BSS local symbols (.lcomm).
if (GVKind.isCommon() || GVKind.isBSSLocal()) {
+ assert(!(IsEmuTLSVar && GVKind.isCommon()) &&
+ "No emulated TLS variables in the common section");
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
unsigned Align = 1 << AlignLog;
Align = 0;
// .comm _foo, 42, 4
- OutStreamer.EmitCommonSymbol(GVSym, Size, Align);
+ OutStreamer->EmitCommonSymbol(GVSym, Size, Align);
return;
}
// Handle local BSS symbols.
if (MAI->hasMachoZeroFillDirective()) {
- const MCSection *TheSection =
- getObjFileLowering().SectionForGlobal(GV, GVKind, *Mang, TM);
+ MCSection *TheSection =
+ getObjFileLowering().SectionForGlobal(GV, GVKind, *Mang, TM);
// .zerofill __DATA, __bss, _foo, 400, 5
- OutStreamer.EmitZerofill(TheSection, GVSym, Size, Align);
+ OutStreamer->EmitZerofill(TheSection, GVSym, Size, Align);
return;
}
// Prefer to simply fall back to .local / .comm in this case.
if (MAI->getLCOMMDirectiveAlignmentType() != LCOMM::NoAlignment) {
// .lcomm _foo, 42
- OutStreamer.EmitLocalCommonSymbol(GVSym, Size, Align);
+ OutStreamer->EmitLocalCommonSymbol(GVSym, Size, Align);
return;
}
Align = 0;
// .local _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local);
+ OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Local);
// .comm _foo, 42, 4
- OutStreamer.EmitCommonSymbol(GVSym, Size, Align);
+ OutStreamer->EmitCommonSymbol(GVSym, Size, Align);
return;
}
- const MCSection *TheSection =
- getObjFileLowering().SectionForGlobal(GV, GVKind, *Mang, TM);
+ if (IsEmuTLSVar && AllZeroInitValue)
+ return; // No need of initialization values.
+
+ MCSymbol *EmittedInitSym = IsEmuTLSVar ?
+ getOrCreateEmuTLSInitSym(GVSym, OutContext) : GVSym;
+ // getOrCreateEmuTLSInitSym only creates the symbol with name and default attributes.
+ // GV's or GVSym's attributes will be used for the EmittedInitSym.
+
+ MCSection *TheSection = IsEmuTLSVar ?
+ getObjFileLowering().getReadOnlySection() :
+ getObjFileLowering().SectionForGlobal(GV, GVKind, *Mang, TM);
// Handle the zerofill directive on darwin, which is a special form of BSS
// emission.
- if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) {
+ if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective() && !IsEmuTLSVar) {
if (Size == 0) Size = 1; // zerofill of 0 bytes is undefined.
// .globl _foo
- OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Global);
// .zerofill __DATA, __common, _foo, 400, 5
- OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog);
+ OutStreamer->EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog);
return;
}
// TLOF class. This will also make it more obvious that stuff like
// MCStreamer::EmitTBSSSymbol is macho specific and only called from macho
// specific code.
- if (GVKind.isThreadLocal() && MAI->hasMachoTBSSDirective()) {
+ if (GVKind.isThreadLocal() && MAI->hasMachoTBSSDirective() && !IsEmuTLSVar) {
// Emit the .tbss symbol
MCSymbol *MangSym =
- OutContext.GetOrCreateSymbol(GVSym->getName() + Twine("$tlv$init"));
+ OutContext.getOrCreateSymbol(GVSym->getName() + Twine("$tlv$init"));
if (GVKind.isThreadBSS()) {
TheSection = getObjFileLowering().getTLSBSSSection();
- OutStreamer.EmitTBSSSymbol(TheSection, MangSym, Size, 1 << AlignLog);
+ OutStreamer->EmitTBSSSymbol(TheSection, MangSym, Size, 1 << AlignLog);
} else if (GVKind.isThreadData()) {
- OutStreamer.SwitchSection(TheSection);
+ OutStreamer->SwitchSection(TheSection);
EmitAlignment(AlignLog, GV);
- OutStreamer.EmitLabel(MangSym);
+ OutStreamer->EmitLabel(MangSym);
- EmitGlobalConstant(GV->getInitializer());
+ EmitGlobalConstant(GV->getParent()->getDataLayout(),
+ GV->getInitializer());
}
- OutStreamer.AddBlankLine();
+ OutStreamer->AddBlankLine();
// Emit the variable struct for the runtime.
- const MCSection *TLVSect
- = getObjFileLowering().getTLSExtraDataSection();
+ MCSection *TLVSect = getObjFileLowering().getTLSExtraDataSection();
- OutStreamer.SwitchSection(TLVSect);
+ OutStreamer->SwitchSection(TLVSect);
// Emit the linkage here.
EmitLinkage(GV, GVSym);
- OutStreamer.EmitLabel(GVSym);
+ OutStreamer->EmitLabel(GVSym);
// Three pointers in size:
// - __tlv_bootstrap - used to make sure support exists
// - spare pointer, used when mapped by the runtime
// - pointer to mangled symbol above with initializer
- unsigned PtrSize = DL->getPointerTypeSize(GV->getType());
- OutStreamer.EmitSymbolValue(GetExternalSymbolSymbol("_tlv_bootstrap"),
+ unsigned PtrSize = DL.getPointerTypeSize(GV->getType());
+ OutStreamer->EmitSymbolValue(GetExternalSymbolSymbol("_tlv_bootstrap"),
PtrSize);
- OutStreamer.EmitIntValue(0, PtrSize);
- OutStreamer.EmitSymbolValue(MangSym, PtrSize);
+ OutStreamer->EmitIntValue(0, PtrSize);
+ OutStreamer->EmitSymbolValue(MangSym, PtrSize);
- OutStreamer.AddBlankLine();
+ OutStreamer->AddBlankLine();
return;
}
- OutStreamer.SwitchSection(TheSection);
+ OutStreamer->SwitchSection(TheSection);
- EmitLinkage(GV, GVSym);
+ // emutls_t.* symbols are only used in the current compilation unit.
+ if (!IsEmuTLSVar)
+ EmitLinkage(GV, EmittedInitSym);
EmitAlignment(AlignLog, GV);
- OutStreamer.EmitLabel(GVSym);
+ OutStreamer->EmitLabel(EmittedInitSym);
- EmitGlobalConstant(GV->getInitializer());
+ EmitGlobalConstant(GV->getParent()->getDataLayout(), GV->getInitializer());
if (MAI->hasDotTypeDotSizeDirective())
// .size foo, 42
- OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext));
+ OutStreamer->emitELFSize(cast<MCSymbolELF>(EmittedInitSym),
+ MCConstantExpr::create(Size, OutContext));
- OutStreamer.AddBlankLine();
+ OutStreamer->AddBlankLine();
}
/// EmitFunctionHeader - This method emits the header for the current
// Print the 'header' of function.
const Function *F = MF->getFunction();
- OutStreamer.SwitchSection(
+ OutStreamer->SwitchSection(
getObjFileLowering().SectionForGlobal(F, *Mang, TM));
EmitVisibility(CurrentFnSym, F->getVisibility());
EmitLinkage(F, CurrentFnSym);
- EmitAlignment(MF->getAlignment(), F);
+ if (MAI->hasFunctionAlignment())
+ EmitAlignment(MF->getAlignment(), F);
if (MAI->hasDotTypeDotSizeDirective())
- OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction);
+ OutStreamer->EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction);
if (isVerbose()) {
- F->printAsOperand(OutStreamer.GetCommentOS(),
+ F->printAsOperand(OutStreamer->GetCommentOS(),
/*PrintType=*/false, F->getParent());
- OutStreamer.GetCommentOS() << '\n';
+ OutStreamer->GetCommentOS() << '\n';
}
// Emit the prefix data.
if (F->hasPrefixData())
- EmitGlobalConstant(F->getPrefixData());
+ EmitGlobalConstant(F->getParent()->getDataLayout(), F->getPrefixData());
// Emit the CurrentFnSym. This is a virtual function to allow targets to
// do their wild and crazy things as required.
std::vector<MCSymbol*> DeadBlockSyms;
MMI->takeDeletedSymbolsForFunction(F, DeadBlockSyms);
for (unsigned i = 0, e = DeadBlockSyms.size(); i != e; ++i) {
- OutStreamer.AddComment("Address taken block that was later removed");
- OutStreamer.EmitLabel(DeadBlockSyms[i]);
+ OutStreamer->AddComment("Address taken block that was later removed");
+ OutStreamer->EmitLabel(DeadBlockSyms[i]);
+ }
+
+ if (CurrentFnBegin) {
+ if (MAI->useAssignmentForEHBegin()) {
+ MCSymbol *CurPos = OutContext.createTempSymbol();
+ OutStreamer->EmitLabel(CurPos);
+ OutStreamer->EmitAssignment(CurrentFnBegin,
+ MCSymbolRefExpr::create(CurPos, OutContext));
+ } else {
+ OutStreamer->EmitLabel(CurrentFnBegin);
+ }
}
// Emit pre-function debug and/or EH information.
// Emit the prologue data.
if (F->hasPrologueData())
- EmitGlobalConstant(F->getPrologueData());
+ EmitGlobalConstant(F->getParent()->getDataLayout(), F->getPrologueData());
}
/// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the
report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
"' label emitted multiple times to assembly file");
- return OutStreamer.EmitLabel(CurrentFnSym);
+ return OutStreamer->EmitLabel(CurrentFnSym);
}
/// emitComments - Pretty-print comments for instructions.
static void emitComments(const MachineInstr &MI, raw_ostream &CommentOS) {
const MachineFunction *MF = MI.getParent()->getParent();
- const TargetMachine &TM = MF->getTarget();
+ const TargetInstrInfo *TII = MF->getSubtarget().getInstrInfo();
// Check for spills and reloads
int FI;
// We assume a single instruction only has a spill or reload, not
// both.
const MachineMemOperand *MMO;
- if (TM.getSubtargetImpl()->getInstrInfo()->isLoadFromStackSlotPostFE(&MI,
- FI)) {
+ if (TII->isLoadFromStackSlotPostFE(&MI, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI)) {
MMO = *MI.memoperands_begin();
CommentOS << MMO->getSize() << "-byte Reload\n";
}
- } else if (TM.getSubtargetImpl()->getInstrInfo()->hasLoadFromStackSlot(
- &MI, MMO, FI)) {
+ } else if (TII->hasLoadFromStackSlot(&MI, MMO, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI))
CommentOS << MMO->getSize() << "-byte Folded Reload\n";
- } else if (TM.getSubtargetImpl()->getInstrInfo()->isStoreToStackSlotPostFE(
- &MI, FI)) {
+ } else if (TII->isStoreToStackSlotPostFE(&MI, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI)) {
MMO = *MI.memoperands_begin();
CommentOS << MMO->getSize() << "-byte Spill\n";
}
- } else if (TM.getSubtargetImpl()->getInstrInfo()->hasStoreToStackSlot(
- &MI, MMO, FI)) {
+ } else if (TII->hasStoreToStackSlot(&MI, MMO, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI))
CommentOS << MMO->getSize() << "-byte Folded Spill\n";
}
/// that is an implicit def.
void AsmPrinter::emitImplicitDef(const MachineInstr *MI) const {
unsigned RegNo = MI->getOperand(0).getReg();
- OutStreamer.AddComment(
- Twine("implicit-def: ") +
- TM.getSubtargetImpl()->getRegisterInfo()->getName(RegNo));
- OutStreamer.AddBlankLine();
+
+ SmallString<128> Str;
+ raw_svector_ostream OS(Str);
+ OS << "implicit-def: "
+ << PrintReg(RegNo, MF->getSubtarget().getRegisterInfo());
+
+ OutStreamer->AddComment(OS.str());
+ OutStreamer->AddBlankLine();
}
static void emitKill(const MachineInstr *MI, AsmPrinter &AP) {
- std::string Str = "kill:";
+ std::string Str;
+ raw_string_ostream OS(Str);
+ OS << "kill:";
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
const MachineOperand &Op = MI->getOperand(i);
assert(Op.isReg() && "KILL instruction must have only register operands");
- Str += ' ';
- Str += AP.TM.getSubtargetImpl()->getRegisterInfo()->getName(Op.getReg());
- Str += (Op.isDef() ? "<def>" : "<kill>");
+ OS << ' '
+ << PrintReg(Op.getReg(),
+ AP.MF->getSubtarget().getRegisterInfo())
+ << (Op.isDef() ? "<def>" : "<kill>");
}
- AP.OutStreamer.AddComment(Str);
- AP.OutStreamer.AddBlankLine();
+ AP.OutStreamer->AddComment(Str);
+ AP.OutStreamer->AddBlankLine();
}
/// emitDebugValueComment - This method handles the target-independent form
raw_svector_ostream OS(Str);
OS << "DEBUG_VALUE: ";
- DIVariable V = MI->getDebugVariable();
- if (V.getContext().isSubprogram()) {
- StringRef Name = DISubprogram(V.getContext()).getDisplayName();
+ const DILocalVariable *V = MI->getDebugVariable();
+ if (auto *SP = dyn_cast<DISubprogram>(V->getScope())) {
+ StringRef Name = SP->getDisplayName();
if (!Name.empty())
OS << Name << ":";
}
- OS << V.getName();
+ OS << V->getName();
- DIExpression Expr = MI->getDebugExpression();
- if (Expr.isBitPiece())
- OS << " [bit_piece offset=" << Expr.getBitPieceOffset()
- << " size=" << Expr.getBitPieceSize() << "]";
+ const DIExpression *Expr = MI->getDebugExpression();
+ if (Expr->isBitPiece())
+ OS << " [bit_piece offset=" << Expr->getBitPieceOffset()
+ << " size=" << Expr->getBitPieceSize() << "]";
OS << " <- ";
// The second operand is only an offset if it's an immediate.
bool Deref = MI->getOperand(0).isReg() && MI->getOperand(1).isImm();
int64_t Offset = Deref ? MI->getOperand(1).getImm() : 0;
+ for (unsigned i = 0; i < Expr->getNumElements(); ++i) {
+ if (Deref) {
+ // We currently don't support extra Offsets or derefs after the first
+ // one. Bail out early instead of emitting an incorrect comment
+ OS << " [complex expression]";
+ AP.OutStreamer->emitRawComment(OS.str());
+ return true;
+ }
+ uint64_t Op = Expr->getElement(i);
+ if (Op == dwarf::DW_OP_deref) {
+ Deref = true;
+ continue;
+ } else if (Op == dwarf::DW_OP_bit_piece) {
+ // There can't be any operands after this in a valid expression
+ break;
+ }
+ uint64_t ExtraOffset = Expr->getElement(i++);
+ if (Op == dwarf::DW_OP_plus)
+ Offset += ExtraOffset;
+ else {
+ assert(Op == dwarf::DW_OP_minus);
+ Offset -= ExtraOffset;
+ }
+ }
+
// Register or immediate value. Register 0 means undef.
if (MI->getOperand(0).isFPImm()) {
APFloat APF = APFloat(MI->getOperand(0).getFPImm()->getValueAPF());
Reg = MI->getOperand(0).getReg();
} else {
assert(MI->getOperand(0).isFI() && "Unknown operand type");
- const TargetFrameLowering *TFI =
- AP.TM.getSubtargetImpl()->getFrameLowering();
+ const TargetFrameLowering *TFI = AP.MF->getSubtarget().getFrameLowering();
Offset += TFI->getFrameIndexReference(*AP.MF,
MI->getOperand(0).getIndex(), Reg);
Deref = true;
// Suppress offset, it is not meaningful here.
OS << "undef";
// NOTE: Want this comment at start of line, don't emit with AddComment.
- AP.OutStreamer.emitRawComment(OS.str());
+ AP.OutStreamer->emitRawComment(OS.str());
return true;
}
if (Deref)
OS << '[';
- OS << AP.TM.getSubtargetImpl()->getRegisterInfo()->getName(Reg);
+ OS << PrintReg(Reg, AP.MF->getSubtarget().getRegisterInfo());
}
if (Deref)
OS << '+' << Offset << ']';
// NOTE: Want this comment at start of line, don't emit with AddComment.
- AP.OutStreamer.emitRawComment(OS.str());
+ AP.OutStreamer->emitRawComment(OS.str());
return true;
}
int FrameOffset = MI.getOperand(1).getImm();
// Emit a symbol assignment.
- OutStreamer.EmitAssignment(FrameAllocSym,
- MCConstantExpr::Create(FrameOffset, OutContext));
+ OutStreamer->EmitAssignment(FrameAllocSym,
+ MCConstantExpr::create(FrameOffset, OutContext));
}
/// EmitFunctionBody - This method emits the body and trailer for a
/// function.
void AsmPrinter::EmitFunctionBody() {
+ EmitFunctionHeader();
+
// Emit target-specific gunk before the function body.
EmitFunctionBodyStart();
}
if (isVerbose())
- emitComments(MI, OutStreamer.GetCommentOS());
+ emitComments(MI, OutStreamer->GetCommentOS());
switch (MI.getOpcode()) {
case TargetOpcode::CFI_INSTRUCTION:
emitCFIInstruction(MI);
break;
- case TargetOpcode::FRAME_ALLOC:
+ case TargetOpcode::LOCAL_ESCAPE:
emitFrameAlloc(MI);
break;
case TargetOpcode::EH_LABEL:
case TargetOpcode::GC_LABEL:
- OutStreamer.EmitLabel(MI.getOperand(0).getMCSymbol());
+ OutStreamer->EmitLabel(MI.getOperand(0).getMCSymbol());
break;
case TargetOpcode::INLINEASM:
EmitInlineAsm(&MI);
// labels from collapsing together. Just emit a noop.
if ((MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode)) {
MCInst Noop;
- TM.getSubtargetImpl()->getInstrInfo()->getNoopForMachoTarget(Noop);
- OutStreamer.AddComment("avoids zero-length function");
+ MF->getSubtarget().getInstrInfo()->getNoopForMachoTarget(Noop);
+ OutStreamer->AddComment("avoids zero-length function");
// Targets can opt-out of emitting the noop here by leaving the opcode
// unspecified.
if (Noop.getOpcode())
- OutStreamer.EmitInstruction(Noop, getSubtargetInfo());
+ OutStreamer->EmitInstruction(Noop, getSubtargetInfo());
}
const Function *F = MF->getFunction();
MCSymbol *Sym = GetBlockAddressSymbol(&BB);
if (Sym->isDefined())
continue;
- OutStreamer.AddComment("Address of block that was removed by CodeGen");
- OutStreamer.EmitLabel(Sym);
+ OutStreamer->AddComment("Address of block that was removed by CodeGen");
+ OutStreamer->EmitLabel(Sym);
}
// Emit target-specific gunk after the function body.
EmitFunctionBodyEnd();
+ if (!MMI->getLandingPads().empty() || MMI->hasDebugInfo() ||
+ MMI->hasEHFunclets() || MAI->hasDotTypeDotSizeDirective()) {
+ // Create a symbol for the end of function.
+ CurrentFnEnd = createTempSymbol("func_end");
+ OutStreamer->EmitLabel(CurrentFnEnd);
+ }
+
// If the target wants a .size directive for the size of the function, emit
// it.
if (MAI->hasDotTypeDotSizeDirective()) {
- // Create a symbol for the end of function, so we can get the size as
- // difference between the function label and the temp label.
- MCSymbol *FnEndLabel = OutContext.CreateTempSymbol();
- OutStreamer.EmitLabel(FnEndLabel);
+ // We can get the size as difference between the function label and the
+ // temp label.
+ const MCExpr *SizeExp = MCBinaryExpr::createSub(
+ MCSymbolRefExpr::create(CurrentFnEnd, OutContext),
+ MCSymbolRefExpr::create(CurrentFnSymForSize, OutContext), OutContext);
+ if (auto Sym = dyn_cast<MCSymbolELF>(CurrentFnSym))
+ OutStreamer->emitELFSize(Sym, SizeExp);
+ }
- const MCExpr *SizeExp =
- MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(FnEndLabel, OutContext),
- MCSymbolRefExpr::Create(CurrentFnSymForSize,
- OutContext),
- OutContext);
- OutStreamer.EmitELFSize(CurrentFnSym, SizeExp);
+ for (const HandlerInfo &HI : Handlers) {
+ NamedRegionTimer T(HI.TimerName, HI.TimerGroupName, TimePassesIsEnabled);
+ HI.Handler->markFunctionEnd();
}
+ // Print out jump tables referenced by the function.
+ EmitJumpTableInfo();
+
// Emit post-function debug and/or EH information.
for (const HandlerInfo &HI : Handlers) {
NamedRegionTimer T(HI.TimerName, HI.TimerGroupName, TimePassesIsEnabled);
}
MMI->EndFunction();
- // Print out jump tables referenced by the function.
- EmitJumpTableInfo();
+ OutStreamer->AddBlankLine();
+}
+
+/// \brief Compute the number of Global Variables that uses a Constant.
+static unsigned getNumGlobalVariableUses(const Constant *C) {
+ if (!C)
+ return 0;
+
+ if (isa<GlobalVariable>(C))
+ return 1;
+
+ unsigned NumUses = 0;
+ for (auto *CU : C->users())
+ NumUses += getNumGlobalVariableUses(dyn_cast<Constant>(CU));
+
+ return NumUses;
+}
+
+/// \brief Only consider global GOT equivalents if at least one user is a
+/// cstexpr inside an initializer of another global variables. Also, don't
+/// handle cstexpr inside instructions. During global variable emission,
+/// candidates are skipped and are emitted later in case at least one cstexpr
+/// isn't replaced by a PC relative GOT entry access.
+static bool isGOTEquivalentCandidate(const GlobalVariable *GV,
+ unsigned &NumGOTEquivUsers) {
+ // Global GOT equivalents are unnamed private globals with a constant
+ // pointer initializer to another global symbol. They must point to a
+ // GlobalVariable or Function, i.e., as GlobalValue.
+ if (!GV->hasUnnamedAddr() || !GV->hasInitializer() || !GV->isConstant() ||
+ !GV->isDiscardableIfUnused() || !dyn_cast<GlobalValue>(GV->getOperand(0)))
+ return false;
+
+ // To be a got equivalent, at least one of its users need to be a constant
+ // expression used by another global variable.
+ for (auto *U : GV->users())
+ NumGOTEquivUsers += getNumGlobalVariableUses(dyn_cast<Constant>(U));
+
+ return NumGOTEquivUsers > 0;
+}
+
+/// \brief Unnamed constant global variables solely contaning a pointer to
+/// another globals variable is equivalent to a GOT table entry; it contains the
+/// the address of another symbol. Optimize it and replace accesses to these
+/// "GOT equivalents" by using the GOT entry for the final global instead.
+/// Compute GOT equivalent candidates among all global variables to avoid
+/// emitting them if possible later on, after it use is replaced by a GOT entry
+/// access.
+void AsmPrinter::computeGlobalGOTEquivs(Module &M) {
+ if (!getObjFileLowering().supportIndirectSymViaGOTPCRel())
+ return;
+
+ for (const auto &G : M.globals()) {
+ unsigned NumGOTEquivUsers = 0;
+ if (!isGOTEquivalentCandidate(&G, NumGOTEquivUsers))
+ continue;
- OutStreamer.AddBlankLine();
+ const MCSymbol *GOTEquivSym = getSymbol(&G);
+ GlobalGOTEquivs[GOTEquivSym] = std::make_pair(&G, NumGOTEquivUsers);
+ }
+}
+
+/// \brief Constant expressions using GOT equivalent globals may not be eligible
+/// for PC relative GOT entry conversion, in such cases we need to emit such
+/// globals we previously omitted in EmitGlobalVariable.
+void AsmPrinter::emitGlobalGOTEquivs() {
+ if (!getObjFileLowering().supportIndirectSymViaGOTPCRel())
+ return;
+
+ SmallVector<const GlobalVariable *, 8> FailedCandidates;
+ for (auto &I : GlobalGOTEquivs) {
+ const GlobalVariable *GV = I.second.first;
+ unsigned Cnt = I.second.second;
+ if (Cnt)
+ FailedCandidates.push_back(GV);
+ }
+ GlobalGOTEquivs.clear();
+
+ for (auto *GV : FailedCandidates)
+ EmitGlobalVariable(GV);
}
bool AsmPrinter::doFinalization(Module &M) {
+ // Set the MachineFunction to nullptr so that we can catch attempted
+ // accesses to MF specific features at the module level and so that
+ // we can conditionalize accesses based on whether or not it is nullptr.
+ MF = nullptr;
+
+ // Gather all GOT equivalent globals in the module. We really need two
+ // passes over the globals: one to compute and another to avoid its emission
+ // in EmitGlobalVariable, otherwise we would not be able to handle cases
+ // where the got equivalent shows up before its use.
+ computeGlobalGOTEquivs(M);
+
// Emit global variables.
for (const auto &G : M.globals())
EmitGlobalVariable(&G);
+ // Emit remaining GOT equivalent globals.
+ emitGlobalGOTEquivs();
+
// Emit visibility info for declarations
for (const Function &F : M) {
- if (!F.isDeclaration())
+ if (!F.isDeclarationForLinker())
continue;
GlobalValue::VisibilityTypes V = F.getVisibility();
if (V == GlobalValue::DefaultVisibility)
EmitVisibility(Name, V, false);
}
- // Get information about jump-instruction tables to print.
- JumpInstrTableInfo *JITI = getAnalysisIfAvailable<JumpInstrTableInfo>();
-
- if (JITI && !JITI->getTables().empty()) {
- unsigned Arch = Triple(getTargetTriple()).getArch();
- bool IsThumb = (Arch == Triple::thumb || Arch == Triple::thumbeb);
- MCInst TrapInst;
- TM.getSubtargetImpl()->getInstrInfo()->getTrap(TrapInst);
- unsigned LogAlignment = llvm::Log2_64(JITI->entryByteAlignment());
-
- // Emit the right section for these functions.
- OutStreamer.SwitchSection(OutContext.getObjectFileInfo()->getTextSection());
- for (const auto &KV : JITI->getTables()) {
- uint64_t Count = 0;
- for (const auto &FunPair : KV.second) {
- // Emit the function labels to make this be a function entry point.
- MCSymbol *FunSym =
- OutContext.GetOrCreateSymbol(FunPair.second->getName());
- EmitAlignment(LogAlignment);
- if (IsThumb)
- OutStreamer.EmitThumbFunc(FunSym);
- if (MAI->hasDotTypeDotSizeDirective())
- OutStreamer.EmitSymbolAttribute(FunSym, MCSA_ELF_TypeFunction);
- OutStreamer.EmitLabel(FunSym);
-
- // Emit the jump instruction to transfer control to the original
- // function.
- MCInst JumpToFun;
- MCSymbol *TargetSymbol =
- OutContext.GetOrCreateSymbol(FunPair.first->getName());
- const MCSymbolRefExpr *TargetSymRef =
- MCSymbolRefExpr::Create(TargetSymbol, MCSymbolRefExpr::VK_PLT,
- OutContext);
- TM.getSubtargetImpl()->getInstrInfo()->getUnconditionalBranch(
- JumpToFun, TargetSymRef);
- OutStreamer.EmitInstruction(JumpToFun, getSubtargetInfo());
- ++Count;
- }
-
- // Emit enough padding instructions to fill up to the next power of two.
- uint64_t Remaining = NextPowerOf2(Count) - Count;
- for (uint64_t C = 0; C < Remaining; ++C) {
- EmitAlignment(LogAlignment);
- OutStreamer.EmitInstruction(TrapInst, getSubtargetInfo());
- }
-
- }
- }
+ const TargetLoweringObjectFile &TLOF = getObjFileLowering();
// Emit module flags.
SmallVector<Module::ModuleFlagEntry, 8> ModuleFlags;
M.getModuleFlagsMetadata(ModuleFlags);
if (!ModuleFlags.empty())
- getObjFileLowering().emitModuleFlags(OutStreamer, ModuleFlags, *Mang, TM);
+ TLOF.emitModuleFlags(*OutStreamer, ModuleFlags, *Mang, TM);
+
+ if (TM.getTargetTriple().isOSBinFormatELF()) {
+ MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
- // Make sure we wrote out everything we need.
- OutStreamer.Flush();
+ // Output stubs for external and common global variables.
+ MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
+ if (!Stubs.empty()) {
+ OutStreamer->SwitchSection(TLOF.getDataSection());
+ const DataLayout &DL = M.getDataLayout();
+
+ for (const auto &Stub : Stubs) {
+ OutStreamer->EmitLabel(Stub.first);
+ OutStreamer->EmitSymbolValue(Stub.second.getPointer(),
+ DL.getPointerSize());
+ }
+ }
+ }
// Finalize debug and EH information.
for (const HandlerInfo &HI : Handlers) {
for (const auto &G : M.globals()) {
if (!G.hasExternalWeakLinkage())
continue;
- OutStreamer.EmitSymbolAttribute(getSymbol(&G), MCSA_WeakReference);
+ OutStreamer->EmitSymbolAttribute(getSymbol(&G), MCSA_WeakReference);
}
for (const auto &F : M) {
if (!F.hasExternalWeakLinkage())
continue;
- OutStreamer.EmitSymbolAttribute(getSymbol(&F), MCSA_WeakReference);
+ OutStreamer->EmitSymbolAttribute(getSymbol(&F), MCSA_WeakReference);
}
}
- OutStreamer.AddBlankLine();
+ OutStreamer->AddBlankLine();
for (const auto &Alias : M.aliases()) {
MCSymbol *Name = getSymbol(&Alias);
if (Alias.hasExternalLinkage() || !MAI->getWeakRefDirective())
- OutStreamer.EmitSymbolAttribute(Name, MCSA_Global);
+ OutStreamer->EmitSymbolAttribute(Name, MCSA_Global);
else if (Alias.hasWeakLinkage() || Alias.hasLinkOnceLinkage())
- OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference);
+ OutStreamer->EmitSymbolAttribute(Name, MCSA_WeakReference);
else
assert(Alias.hasLocalLinkage() && "Invalid alias linkage");
+ // Set the symbol type to function if the alias has a function type.
+ // This affects codegen when the aliasee is not a function.
+ if (Alias.getType()->getPointerElementType()->isFunctionTy())
+ OutStreamer->EmitSymbolAttribute(Name, MCSA_ELF_TypeFunction);
+
EmitVisibility(Name, Alias.getVisibility());
// Emit the directives as assignments aka .set:
- OutStreamer.EmitAssignment(Name, lowerConstant(Alias.getAliasee()));
+ OutStreamer->EmitAssignment(Name, lowerConstant(Alias.getAliasee()));
+
+ // If the aliasee does not correspond to a symbol in the output, i.e. the
+ // alias is not of an object or the aliased object is private, then set the
+ // size of the alias symbol from the type of the alias. We don't do this in
+ // other situations as the alias and aliasee having differing types but same
+ // size may be intentional.
+ const GlobalObject *BaseObject = Alias.getBaseObject();
+ if (MAI->hasDotTypeDotSizeDirective() && Alias.getValueType()->isSized() &&
+ (!BaseObject || BaseObject->hasPrivateLinkage())) {
+ const DataLayout &DL = M.getDataLayout();
+ uint64_t Size = DL.getTypeAllocSize(Alias.getValueType());
+ OutStreamer->emitELFSize(cast<MCSymbolELF>(Name),
+ MCConstantExpr::create(Size, OutContext));
+ }
}
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
// Emit __morestack address if needed for indirect calls.
if (MMI->usesMorestackAddr()) {
- const MCSection *ReadOnlySection =
- getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly(),
- /*C=*/nullptr);
- OutStreamer.SwitchSection(ReadOnlySection);
+ MCSection *ReadOnlySection = getObjFileLowering().getSectionForConstant(
+ getDataLayout(), SectionKind::getReadOnly(),
+ /*C=*/nullptr);
+ OutStreamer->SwitchSection(ReadOnlySection);
MCSymbol *AddrSymbol =
- OutContext.GetOrCreateSymbol(StringRef("__morestack_addr"));
- OutStreamer.EmitLabel(AddrSymbol);
+ OutContext.getOrCreateSymbol(StringRef("__morestack_addr"));
+ OutStreamer->EmitLabel(AddrSymbol);
- unsigned PtrSize = TM.getDataLayout()->getPointerSize(0);
- OutStreamer.EmitSymbolValue(GetExternalSymbolSymbol("__morestack"),
- PtrSize);
+ unsigned PtrSize = M.getDataLayout().getPointerSize(0);
+ OutStreamer->EmitSymbolValue(GetExternalSymbolSymbol("__morestack"),
+ PtrSize);
}
// If we don't have any trampolines, then we don't require stack memory
// to be executable. Some targets have a directive to declare this.
Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
- if (const MCSection *S = MAI->getNonexecutableStackSection(OutContext))
- OutStreamer.SwitchSection(S);
+ if (MCSection *S = MAI->getNonexecutableStackSection(OutContext))
+ OutStreamer->SwitchSection(S);
// Allow the target to emit any magic that it wants at the end of the file,
// after everything else has gone out.
delete Mang; Mang = nullptr;
MMI = nullptr;
- OutStreamer.Finish();
- OutStreamer.reset();
+ OutStreamer->Finish();
+ OutStreamer->reset();
return false;
}
+MCSymbol *AsmPrinter::getCurExceptionSym() {
+ if (!CurExceptionSym)
+ CurExceptionSym = createTempSymbol("exception");
+ return CurExceptionSym;
+}
+
void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
this->MF = &MF;
// Get the function symbol.
CurrentFnSym = getSymbol(MF.getFunction());
CurrentFnSymForSize = CurrentFnSym;
+ CurrentFnBegin = nullptr;
+ CurExceptionSym = nullptr;
+ bool NeedsLocalForSize = MAI->needsLocalForSize();
+ if (!MMI->getLandingPads().empty() || MMI->hasDebugInfo() ||
+ MMI->hasEHFunclets() || NeedsLocalForSize) {
+ CurrentFnBegin = createTempSymbol("func_begin");
+ if (NeedsLocalForSize)
+ CurrentFnSymForSize = CurrentFnBegin;
+ }
if (isVerbose())
LI = &getAnalysis<MachineLoopInfo>();
}
namespace {
- // SectionCPs - Keep track the alignment, constpool entries per Section.
+// Keep track the alignment, constpool entries per Section.
struct SectionCPs {
- const MCSection *S;
+ MCSection *S;
unsigned Alignment;
SmallVector<unsigned, 4> CPEs;
- SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {}
+ SectionCPs(MCSection *s, unsigned a) : S(s), Alignment(a) {}
};
}
const MachineConstantPoolEntry &CPE = CP[i];
unsigned Align = CPE.getAlignment();
- SectionKind Kind =
- CPE.getSectionKind(TM.getDataLayout());
+ SectionKind Kind = CPE.getSectionKind(&getDataLayout());
const Constant *C = nullptr;
if (!CPE.isMachineConstantPoolEntry())
C = CPE.Val.ConstVal;
- const MCSection *S = getObjFileLowering().getSectionForConstant(Kind, C);
+ MCSection *S =
+ getObjFileLowering().getSectionForConstant(getDataLayout(), Kind, C);
// The number of sections are small, just do a linear search from the
// last section to the first.
continue;
if (CurSection != CPSections[i].S) {
- OutStreamer.SwitchSection(CPSections[i].S);
+ OutStreamer->SwitchSection(CPSections[i].S);
EmitAlignment(Log2_32(CPSections[i].Alignment));
CurSection = CPSections[i].S;
Offset = 0;
// Emit inter-object padding for alignment.
unsigned AlignMask = CPE.getAlignment() - 1;
unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
- OutStreamer.EmitZeros(NewOffset - Offset);
+ OutStreamer->EmitZeros(NewOffset - Offset);
Type *Ty = CPE.getType();
- Offset = NewOffset +
- TM.getDataLayout()->getTypeAllocSize(Ty);
+ Offset = NewOffset + getDataLayout().getTypeAllocSize(Ty);
- OutStreamer.EmitLabel(Sym);
+ OutStreamer->EmitLabel(Sym);
if (CPE.isMachineConstantPoolEntry())
EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
else
- EmitGlobalConstant(CPE.Val.ConstVal);
+ EmitGlobalConstant(getDataLayout(), CPE.Val.ConstVal);
}
}
}
/// by the current function to the current output stream.
///
void AsmPrinter::EmitJumpTableInfo() {
- const DataLayout *DL = MF->getTarget().getDataLayout();
+ const DataLayout &DL = MF->getDataLayout();
const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
if (!MJTI) return;
if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline) return;
bool JTInDiffSection = !TLOF.shouldPutJumpTableInFunctionSection(
MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32,
*F);
- if (!JTInDiffSection) {
- OutStreamer.SwitchSection(TLOF.SectionForGlobal(F, *Mang, TM));
- } else {
- // Otherwise, drop it in the readonly section.
- const MCSection *ReadOnlySection =
- TLOF.getSectionForJumpTable(*F, *Mang, TM);
- OutStreamer.SwitchSection(ReadOnlySection);
+ if (JTInDiffSection) {
+ // Drop it in the readonly section.
+ MCSection *ReadOnlySection = TLOF.getSectionForJumpTable(*F, *Mang, TM);
+ OutStreamer->SwitchSection(ReadOnlySection);
}
- EmitAlignment(Log2_32(
- MJTI->getEntryAlignment(*TM.getDataLayout())));
+ EmitAlignment(Log2_32(MJTI->getEntryAlignment(DL)));
// Jump tables in code sections are marked with a data_region directive
// where that's supported.
if (!JTInDiffSection)
- OutStreamer.EmitDataRegion(MCDR_DataRegionJT32);
+ OutStreamer->EmitDataRegion(MCDR_DataRegionJT32);
for (unsigned JTI = 0, e = JT.size(); JTI != e; ++JTI) {
const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 &&
MAI->doesSetDirectiveSuppressesReloc()) {
SmallPtrSet<const MachineBasicBlock*, 16> EmittedSets;
- const TargetLowering *TLI = TM.getSubtargetImpl()->getTargetLowering();
+ const TargetLowering *TLI = MF->getSubtarget().getTargetLowering();
const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF,JTI,OutContext);
for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
const MachineBasicBlock *MBB = JTBBs[ii];
// .set LJTSet, LBB32-base
const MCExpr *LHS =
- MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
- OutStreamer.EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()),
- MCBinaryExpr::CreateSub(LHS, Base, OutContext));
+ MCSymbolRefExpr::create(MBB->getSymbol(), OutContext);
+ OutStreamer->EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()),
+ MCBinaryExpr::createSub(LHS, Base,
+ OutContext));
}
}
// before each jump table. The first label is never referenced, but tells
// the assembler and linker the extents of the jump table object. The
// second label is actually referenced by the code.
- if (JTInDiffSection && DL->hasLinkerPrivateGlobalPrefix())
+ if (JTInDiffSection && DL.hasLinkerPrivateGlobalPrefix())
// FIXME: This doesn't have to have any specific name, just any randomly
// named and numbered 'l' label would work. Simplify GetJTISymbol.
- OutStreamer.EmitLabel(GetJTISymbol(JTI, true));
+ OutStreamer->EmitLabel(GetJTISymbol(JTI, true));
- OutStreamer.EmitLabel(GetJTISymbol(JTI));
+ OutStreamer->EmitLabel(GetJTISymbol(JTI));
for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
EmitJumpTableEntry(MJTI, JTBBs[ii], JTI);
}
if (!JTInDiffSection)
- OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
+ OutStreamer->EmitDataRegion(MCDR_DataRegionEnd);
}
/// EmitJumpTableEntry - Emit a jump table entry for the specified MBB to the
case MachineJumpTableInfo::EK_Inline:
llvm_unreachable("Cannot emit EK_Inline jump table entry");
case MachineJumpTableInfo::EK_Custom32:
- Value =
- TM.getSubtargetImpl()->getTargetLowering()->LowerCustomJumpTableEntry(
- MJTI, MBB, UID, OutContext);
+ Value = MF->getSubtarget().getTargetLowering()->LowerCustomJumpTableEntry(
+ MJTI, MBB, UID, OutContext);
break;
case MachineJumpTableInfo::EK_BlockAddress:
// EK_BlockAddress - Each entry is a plain address of block, e.g.:
// .word LBB123
- Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
+ Value = MCSymbolRefExpr::create(MBB->getSymbol(), OutContext);
break;
case MachineJumpTableInfo::EK_GPRel32BlockAddress: {
// EK_GPRel32BlockAddress - Each entry is an address of block, encoded
// with a relocation as gp-relative, e.g.:
// .gprel32 LBB123
MCSymbol *MBBSym = MBB->getSymbol();
- OutStreamer.EmitGPRel32Value(MCSymbolRefExpr::Create(MBBSym, OutContext));
+ OutStreamer->EmitGPRel32Value(MCSymbolRefExpr::create(MBBSym, OutContext));
return;
}
// with a relocation as gp-relative, e.g.:
// .gpdword LBB123
MCSymbol *MBBSym = MBB->getSymbol();
- OutStreamer.EmitGPRel64Value(MCSymbolRefExpr::Create(MBBSym, OutContext));
+ OutStreamer->EmitGPRel64Value(MCSymbolRefExpr::create(MBBSym, OutContext));
return;
}
// .set L4_5_set_123, LBB123 - LJTI1_2
// .word L4_5_set_123
if (MAI->doesSetDirectiveSuppressesReloc()) {
- Value = MCSymbolRefExpr::Create(GetJTSetSymbol(UID, MBB->getNumber()),
+ Value = MCSymbolRefExpr::create(GetJTSetSymbol(UID, MBB->getNumber()),
OutContext);
break;
}
- Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
- const TargetLowering *TLI = TM.getSubtargetImpl()->getTargetLowering();
+ Value = MCSymbolRefExpr::create(MBB->getSymbol(), OutContext);
+ const TargetLowering *TLI = MF->getSubtarget().getTargetLowering();
const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF, UID, OutContext);
- Value = MCBinaryExpr::CreateSub(Value, Base, OutContext);
+ Value = MCBinaryExpr::createSub(Value, Base, OutContext);
break;
}
}
assert(Value && "Unknown entry kind!");
- unsigned EntrySize =
- MJTI->getEntrySize(*TM.getDataLayout());
- OutStreamer.EmitValue(Value, EntrySize);
+ unsigned EntrySize = MJTI->getEntrySize(getDataLayout());
+ OutStreamer->EmitValue(Value, EntrySize);
}
assert(GV->hasInitializer() && "Not a special LLVM global!");
if (GV->getName() == "llvm.global_ctors") {
- EmitXXStructorList(GV->getInitializer(), /* isCtor */ true);
+ EmitXXStructorList(GV->getParent()->getDataLayout(), GV->getInitializer(),
+ /* isCtor */ true);
if (TM.getRelocationModel() == Reloc::Static &&
MAI->hasStaticCtorDtorReferenceInStaticMode()) {
StringRef Sym(".constructors_used");
- OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym),
- MCSA_Reference);
+ OutStreamer->EmitSymbolAttribute(OutContext.getOrCreateSymbol(Sym),
+ MCSA_Reference);
}
return true;
}
if (GV->getName() == "llvm.global_dtors") {
- EmitXXStructorList(GV->getInitializer(), /* isCtor */ false);
+ EmitXXStructorList(GV->getParent()->getDataLayout(), GV->getInitializer(),
+ /* isCtor */ false);
if (TM.getRelocationModel() == Reloc::Static &&
MAI->hasStaticCtorDtorReferenceInStaticMode()) {
StringRef Sym(".destructors_used");
- OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym),
- MCSA_Reference);
+ OutStreamer->EmitSymbolAttribute(OutContext.getOrCreateSymbol(Sym),
+ MCSA_Reference);
}
return true;
}
const GlobalValue *GV =
dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
if (GV)
- OutStreamer.EmitSymbolAttribute(getSymbol(GV), MCSA_NoDeadStrip);
+ OutStreamer->EmitSymbolAttribute(getSymbol(GV), MCSA_NoDeadStrip);
}
}
/// EmitXXStructorList - Emit the ctor or dtor list taking into account the init
/// priority.
-void AsmPrinter::EmitXXStructorList(const Constant *List, bool isCtor) {
+void AsmPrinter::EmitXXStructorList(const DataLayout &DL, const Constant *List,
+ bool isCtor) {
// Should be an array of '{ int, void ()* }' structs. The first value is the
// init priority.
if (!isa<ConstantArray>(List)) return;
}
// Emit the function pointers in the target-specific order
- const DataLayout *DL = TM.getDataLayout();
- unsigned Align = Log2_32(DL->getPointerPrefAlignment());
+ unsigned Align = Log2_32(DL.getPointerPrefAlignment());
std::stable_sort(Structors.begin(), Structors.end(),
[](const Structor &L,
const Structor &R) { return L.Priority < R.Priority; });
KeySym = getSymbol(GV);
}
- const MCSection *OutputSection =
+ MCSection *OutputSection =
(isCtor ? Obj.getStaticCtorSection(S.Priority, KeySym)
: Obj.getStaticDtorSection(S.Priority, KeySym));
- OutStreamer.SwitchSection(OutputSection);
- if (OutStreamer.getCurrentSection() != OutStreamer.getPreviousSection())
+ OutStreamer->SwitchSection(OutputSection);
+ if (OutStreamer->getCurrentSection() != OutStreamer->getPreviousSection())
EmitAlignment(Align);
- EmitXXStructor(S.Func);
+ EmitXXStructor(DL, S.Func);
}
}
assert(N->getNumOperands() == 1 &&
"llvm.ident metadata entry can have only one operand");
const MDString *S = cast<MDString>(N->getOperand(0));
- OutStreamer.EmitIdent(S->getString());
+ OutStreamer->EmitIdent(S->getString());
}
}
}
/// EmitInt8 - Emit a byte directive and value.
///
void AsmPrinter::EmitInt8(int Value) const {
- OutStreamer.EmitIntValue(Value, 1);
+ OutStreamer->EmitIntValue(Value, 1);
}
/// EmitInt16 - Emit a short directive and value.
///
void AsmPrinter::EmitInt16(int Value) const {
- OutStreamer.EmitIntValue(Value, 2);
+ OutStreamer->EmitIntValue(Value, 2);
}
/// EmitInt32 - Emit a long directive and value.
///
void AsmPrinter::EmitInt32(int Value) const {
- OutStreamer.EmitIntValue(Value, 4);
+ OutStreamer->EmitIntValue(Value, 4);
}
/// Emit something like ".long Hi-Lo" where the size in bytes of the directive
/// .set if it avoids relocations.
void AsmPrinter::EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo,
unsigned Size) const {
- // Get the Hi-Lo expression.
- const MCExpr *Diff =
- MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(Hi, OutContext),
- MCSymbolRefExpr::Create(Lo, OutContext),
- OutContext);
-
- if (!MAI->doesSetDirectiveSuppressesReloc()) {
- OutStreamer.EmitValue(Diff, Size);
- return;
- }
-
- // Otherwise, emit with .set (aka assignment).
- MCSymbol *SetLabel = GetTempSymbol("set", SetCounter++);
- OutStreamer.EmitAssignment(SetLabel, Diff);
- OutStreamer.EmitSymbolValue(SetLabel, Size);
+ OutStreamer->emitAbsoluteSymbolDiff(Hi, Lo, Size);
}
/// EmitLabelPlusOffset - Emit something like ".long Label+Offset"
unsigned Size,
bool IsSectionRelative) const {
if (MAI->needsDwarfSectionOffsetDirective() && IsSectionRelative) {
- OutStreamer.EmitCOFFSecRel32(Label);
+ OutStreamer->EmitCOFFSecRel32(Label);
return;
}
// Emit Label+Offset (or just Label if Offset is zero)
- const MCExpr *Expr = MCSymbolRefExpr::Create(Label, OutContext);
+ const MCExpr *Expr = MCSymbolRefExpr::create(Label, OutContext);
if (Offset)
- Expr = MCBinaryExpr::CreateAdd(
- Expr, MCConstantExpr::Create(Offset, OutContext), OutContext);
+ Expr = MCBinaryExpr::createAdd(
+ Expr, MCConstantExpr::create(Offset, OutContext), OutContext);
- OutStreamer.EmitValue(Expr, Size);
+ OutStreamer->EmitValue(Expr, Size);
}
//===----------------------------------------------------------------------===//
//
void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalObject *GV) const {
if (GV)
- NumBits = getGVAlignmentLog2(GV, *TM.getDataLayout(),
- NumBits);
+ NumBits = getGVAlignmentLog2(GV, GV->getParent()->getDataLayout(), NumBits);
if (NumBits == 0) return; // 1-byte aligned: no need to emit alignment.
static_cast<unsigned>(std::numeric_limits<unsigned>::digits) &&
"undefined behavior");
if (getCurrentSection()->getKind().isText())
- OutStreamer.EmitCodeAlignment(1u << NumBits);
+ OutStreamer->EmitCodeAlignment(1u << NumBits);
else
- OutStreamer.EmitValueToAlignment(1u << NumBits);
+ OutStreamer->EmitValueToAlignment(1u << NumBits);
}
//===----------------------------------------------------------------------===//
MCContext &Ctx = OutContext;
if (CV->isNullValue() || isa<UndefValue>(CV))
- return MCConstantExpr::Create(0, Ctx);
+ return MCConstantExpr::create(0, Ctx);
if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV))
- return MCConstantExpr::Create(CI->getZExtValue(), Ctx);
+ return MCConstantExpr::create(CI->getZExtValue(), Ctx);
if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
- return MCSymbolRefExpr::Create(getSymbol(GV), Ctx);
+ return MCSymbolRefExpr::create(getSymbol(GV), Ctx);
if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV))
- return MCSymbolRefExpr::Create(GetBlockAddressSymbol(BA), Ctx);
+ return MCSymbolRefExpr::create(GetBlockAddressSymbol(BA), Ctx);
const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV);
if (!CE) {
// If the code isn't optimized, there may be outstanding folding
// opportunities. Attempt to fold the expression using DataLayout as a
// last resort before giving up.
- if (Constant *C = ConstantFoldConstantExpression(
- CE, TM.getDataLayout()))
+ if (Constant *C = ConstantFoldConstantExpression(CE, getDataLayout()))
if (C != CE)
return lowerConstant(C);
report_fatal_error(OS.str());
}
case Instruction::GetElementPtr: {
- const DataLayout &DL = *TM.getDataLayout();
-
// Generate a symbolic expression for the byte address
- APInt OffsetAI(DL.getPointerTypeSizeInBits(CE->getType()), 0);
- cast<GEPOperator>(CE)->accumulateConstantOffset(DL, OffsetAI);
+ APInt OffsetAI(getDataLayout().getPointerTypeSizeInBits(CE->getType()), 0);
+ cast<GEPOperator>(CE)->accumulateConstantOffset(getDataLayout(), OffsetAI);
const MCExpr *Base = lowerConstant(CE->getOperand(0));
if (!OffsetAI)
return Base;
int64_t Offset = OffsetAI.getSExtValue();
- return MCBinaryExpr::CreateAdd(Base, MCConstantExpr::Create(Offset, Ctx),
+ return MCBinaryExpr::createAdd(Base, MCConstantExpr::create(Offset, Ctx),
Ctx);
}
return lowerConstant(CE->getOperand(0));
case Instruction::IntToPtr: {
- const DataLayout &DL = *TM.getDataLayout();
+ const DataLayout &DL = getDataLayout();
// Handle casts to pointers by changing them into casts to the appropriate
// integer type. This promotes constant folding and simplifies this code.
}
case Instruction::PtrToInt: {
- const DataLayout &DL = *TM.getDataLayout();
+ const DataLayout &DL = getDataLayout();
// Support only foldable casts to/from pointers that can be eliminated by
// changing the pointer to the appropriately sized integer type.
// the high bits so we are sure to get a proper truncation if the input is
// a constant expr.
unsigned InBits = DL.getTypeAllocSizeInBits(Op->getType());
- const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx);
- return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx);
+ const MCExpr *MaskExpr = MCConstantExpr::create(~0ULL >> (64-InBits), Ctx);
+ return MCBinaryExpr::createAnd(OpExpr, MaskExpr, Ctx);
}
// The MC library also has a right-shift operator, but it isn't consistently
const MCExpr *RHS = lowerConstant(CE->getOperand(1));
switch (CE->getOpcode()) {
default: llvm_unreachable("Unknown binary operator constant cast expr");
- case Instruction::Add: return MCBinaryExpr::CreateAdd(LHS, RHS, Ctx);
- case Instruction::Sub: return MCBinaryExpr::CreateSub(LHS, RHS, Ctx);
- case Instruction::Mul: return MCBinaryExpr::CreateMul(LHS, RHS, Ctx);
- case Instruction::SDiv: return MCBinaryExpr::CreateDiv(LHS, RHS, Ctx);
- case Instruction::SRem: return MCBinaryExpr::CreateMod(LHS, RHS, Ctx);
- case Instruction::Shl: return MCBinaryExpr::CreateShl(LHS, RHS, Ctx);
- case Instruction::And: return MCBinaryExpr::CreateAnd(LHS, RHS, Ctx);
- case Instruction::Or: return MCBinaryExpr::CreateOr (LHS, RHS, Ctx);
- case Instruction::Xor: return MCBinaryExpr::CreateXor(LHS, RHS, Ctx);
+ case Instruction::Add: return MCBinaryExpr::createAdd(LHS, RHS, Ctx);
+ case Instruction::Sub: return MCBinaryExpr::createSub(LHS, RHS, Ctx);
+ case Instruction::Mul: return MCBinaryExpr::createMul(LHS, RHS, Ctx);
+ case Instruction::SDiv: return MCBinaryExpr::createDiv(LHS, RHS, Ctx);
+ case Instruction::SRem: return MCBinaryExpr::createMod(LHS, RHS, Ctx);
+ case Instruction::Shl: return MCBinaryExpr::createShl(LHS, RHS, Ctx);
+ case Instruction::And: return MCBinaryExpr::createAnd(LHS, RHS, Ctx);
+ case Instruction::Or: return MCBinaryExpr::createOr (LHS, RHS, Ctx);
+ case Instruction::Xor: return MCBinaryExpr::createXor(LHS, RHS, Ctx);
}
}
}
}
-static void emitGlobalConstantImpl(const Constant *C, AsmPrinter &AP);
+static void emitGlobalConstantImpl(const DataLayout &DL, const Constant *C,
+ AsmPrinter &AP,
+ const Constant *BaseCV = nullptr,
+ uint64_t Offset = 0);
+
+static void emitGlobalConstantFP(const ConstantFP *CFP, AsmPrinter &AP);
/// isRepeatedByteSequence - Determine whether the given value is
/// composed of a repeated sequence of identical bytes and return the
/// isRepeatedByteSequence - Determine whether the given value is
/// composed of a repeated sequence of identical bytes and return the
/// byte value. If it is not a repeated sequence, return -1.
-static int isRepeatedByteSequence(const Value *V, TargetMachine &TM) {
-
+static int isRepeatedByteSequence(const Value *V, const DataLayout &DL) {
if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
- if (CI->getBitWidth() > 64) return -1;
+ uint64_t Size = DL.getTypeAllocSizeInBits(V->getType());
+ assert(Size % 8 == 0);
- uint64_t Size =
- TM.getDataLayout()->getTypeAllocSize(V->getType());
- uint64_t Value = CI->getZExtValue();
+ // Extend the element to take zero padding into account.
+ APInt Value = CI->getValue().zextOrSelf(Size);
+ if (!Value.isSplat(8))
+ return -1;
- // Make sure the constant is at least 8 bits long and has a power
- // of 2 bit width. This guarantees the constant bit width is
- // always a multiple of 8 bits, avoiding issues with padding out
- // to Size and other such corner cases.
- if (CI->getBitWidth() < 8 || !isPowerOf2_64(CI->getBitWidth())) return -1;
-
- uint8_t Byte = static_cast<uint8_t>(Value);
-
- for (unsigned i = 1; i < Size; ++i) {
- Value >>= 8;
- if (static_cast<uint8_t>(Value) != Byte) return -1;
- }
- return Byte;
+ return Value.zextOrTrunc(8).getZExtValue();
}
if (const ConstantArray *CA = dyn_cast<ConstantArray>(V)) {
// Make sure all array elements are sequences of the same repeated
// byte.
assert(CA->getNumOperands() != 0 && "Should be a CAZ");
- int Byte = isRepeatedByteSequence(CA->getOperand(0), TM);
- if (Byte == -1) return -1;
-
- for (unsigned i = 1, e = CA->getNumOperands(); i != e; ++i) {
- int ThisByte = isRepeatedByteSequence(CA->getOperand(i), TM);
- if (ThisByte == -1) return -1;
- if (Byte != ThisByte) return -1;
- }
+ Constant *Op0 = CA->getOperand(0);
+ int Byte = isRepeatedByteSequence(Op0, DL);
+ if (Byte == -1)
+ return -1;
+
+ // All array elements must be equal.
+ for (unsigned i = 1, e = CA->getNumOperands(); i != e; ++i)
+ if (CA->getOperand(i) != Op0)
+ return -1;
return Byte;
}
return -1;
}
-static void emitGlobalConstantDataSequential(const ConstantDataSequential *CDS,
- AsmPrinter &AP){
+static void emitGlobalConstantDataSequential(const DataLayout &DL,
+ const ConstantDataSequential *CDS,
+ AsmPrinter &AP) {
// See if we can aggregate this into a .fill, if so, emit it as such.
- int Value = isRepeatedByteSequence(CDS, AP.TM);
+ int Value = isRepeatedByteSequence(CDS, DL);
if (Value != -1) {
- uint64_t Bytes =
- AP.TM.getDataLayout()->getTypeAllocSize(
- CDS->getType());
+ uint64_t Bytes = DL.getTypeAllocSize(CDS->getType());
// Don't emit a 1-byte object as a .fill.
if (Bytes > 1)
- return AP.OutStreamer.EmitFill(Bytes, Value);
+ return AP.OutStreamer->EmitFill(Bytes, Value);
}
// If this can be emitted with .ascii/.asciz, emit it as such.
if (CDS->isString())
- return AP.OutStreamer.EmitBytes(CDS->getAsString());
+ return AP.OutStreamer->EmitBytes(CDS->getAsString());
// Otherwise, emit the values in successive locations.
unsigned ElementByteSize = CDS->getElementByteSize();
if (isa<IntegerType>(CDS->getElementType())) {
for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
if (AP.isVerbose())
- AP.OutStreamer.GetCommentOS() << format("0x%" PRIx64 "\n",
- CDS->getElementAsInteger(i));
- AP.OutStreamer.EmitIntValue(CDS->getElementAsInteger(i),
- ElementByteSize);
- }
- } else if (ElementByteSize == 4) {
- // FP Constants are printed as integer constants to avoid losing
- // precision.
- assert(CDS->getElementType()->isFloatTy());
- for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
- union {
- float F;
- uint32_t I;
- };
-
- F = CDS->getElementAsFloat(i);
- if (AP.isVerbose())
- AP.OutStreamer.GetCommentOS() << "float " << F << '\n';
- AP.OutStreamer.EmitIntValue(I, 4);
+ AP.OutStreamer->GetCommentOS() << format("0x%" PRIx64 "\n",
+ CDS->getElementAsInteger(i));
+ AP.OutStreamer->EmitIntValue(CDS->getElementAsInteger(i),
+ ElementByteSize);
}
} else {
- assert(CDS->getElementType()->isDoubleTy());
- for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
- union {
- double F;
- uint64_t I;
- };
-
- F = CDS->getElementAsDouble(i);
- if (AP.isVerbose())
- AP.OutStreamer.GetCommentOS() << "double " << F << '\n';
- AP.OutStreamer.EmitIntValue(I, 8);
- }
+ for (unsigned I = 0, E = CDS->getNumElements(); I != E; ++I)
+ emitGlobalConstantFP(cast<ConstantFP>(CDS->getElementAsConstant(I)), AP);
}
- const DataLayout &DL = *AP.TM.getDataLayout();
unsigned Size = DL.getTypeAllocSize(CDS->getType());
unsigned EmittedSize = DL.getTypeAllocSize(CDS->getType()->getElementType()) *
CDS->getNumElements();
if (unsigned Padding = Size - EmittedSize)
- AP.OutStreamer.EmitZeros(Padding);
+ AP.OutStreamer->EmitZeros(Padding);
}
-static void emitGlobalConstantArray(const ConstantArray *CA, AsmPrinter &AP) {
+static void emitGlobalConstantArray(const DataLayout &DL,
+ const ConstantArray *CA, AsmPrinter &AP,
+ const Constant *BaseCV, uint64_t Offset) {
// See if we can aggregate some values. Make sure it can be
// represented as a series of bytes of the constant value.
- int Value = isRepeatedByteSequence(CA, AP.TM);
+ int Value = isRepeatedByteSequence(CA, DL);
if (Value != -1) {
- uint64_t Bytes =
- AP.TM.getDataLayout()->getTypeAllocSize(
- CA->getType());
- AP.OutStreamer.EmitFill(Bytes, Value);
+ uint64_t Bytes = DL.getTypeAllocSize(CA->getType());
+ AP.OutStreamer->EmitFill(Bytes, Value);
}
else {
- for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
- emitGlobalConstantImpl(CA->getOperand(i), AP);
+ for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) {
+ emitGlobalConstantImpl(DL, CA->getOperand(i), AP, BaseCV, Offset);
+ Offset += DL.getTypeAllocSize(CA->getOperand(i)->getType());
+ }
}
}
-static void emitGlobalConstantVector(const ConstantVector *CV, AsmPrinter &AP) {
+static void emitGlobalConstantVector(const DataLayout &DL,
+ const ConstantVector *CV, AsmPrinter &AP) {
for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
- emitGlobalConstantImpl(CV->getOperand(i), AP);
+ emitGlobalConstantImpl(DL, CV->getOperand(i), AP);
- const DataLayout &DL = *AP.TM.getDataLayout();
unsigned Size = DL.getTypeAllocSize(CV->getType());
unsigned EmittedSize = DL.getTypeAllocSize(CV->getType()->getElementType()) *
CV->getType()->getNumElements();
if (unsigned Padding = Size - EmittedSize)
- AP.OutStreamer.EmitZeros(Padding);
+ AP.OutStreamer->EmitZeros(Padding);
}
-static void emitGlobalConstantStruct(const ConstantStruct *CS, AsmPrinter &AP) {
+static void emitGlobalConstantStruct(const DataLayout &DL,
+ const ConstantStruct *CS, AsmPrinter &AP,
+ const Constant *BaseCV, uint64_t Offset) {
// Print the fields in successive locations. Pad to align if needed!
- const DataLayout *DL = AP.TM.getDataLayout();
- unsigned Size = DL->getTypeAllocSize(CS->getType());
- const StructLayout *Layout = DL->getStructLayout(CS->getType());
+ unsigned Size = DL.getTypeAllocSize(CS->getType());
+ const StructLayout *Layout = DL.getStructLayout(CS->getType());
uint64_t SizeSoFar = 0;
for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) {
const Constant *Field = CS->getOperand(i);
+ // Print the actual field value.
+ emitGlobalConstantImpl(DL, Field, AP, BaseCV, Offset + SizeSoFar);
+
// Check if padding is needed and insert one or more 0s.
- uint64_t FieldSize = DL->getTypeAllocSize(Field->getType());
+ uint64_t FieldSize = DL.getTypeAllocSize(Field->getType());
uint64_t PadSize = ((i == e-1 ? Size : Layout->getElementOffset(i+1))
- Layout->getElementOffset(i)) - FieldSize;
SizeSoFar += FieldSize + PadSize;
- // Now print the actual field value.
- emitGlobalConstantImpl(Field, AP);
-
// Insert padding - this may include padding to increase the size of the
// current field up to the ABI size (if the struct is not packed) as well
// as padding to ensure that the next field starts at the right offset.
- AP.OutStreamer.EmitZeros(PadSize);
+ AP.OutStreamer->EmitZeros(PadSize);
}
assert(SizeSoFar == Layout->getSizeInBytes() &&
"Layout of constant struct may be incorrect!");
CFP->getValueAPF().toString(StrVal);
if (CFP->getType())
- CFP->getType()->print(AP.OutStreamer.GetCommentOS());
+ CFP->getType()->print(AP.OutStreamer->GetCommentOS());
else
- AP.OutStreamer.GetCommentOS() << "Printing <null> Type";
- AP.OutStreamer.GetCommentOS() << ' ' << StrVal << '\n';
+ AP.OutStreamer->GetCommentOS() << "Printing <null> Type";
+ AP.OutStreamer->GetCommentOS() << ' ' << StrVal << '\n';
}
// Now iterate through the APInt chunks, emitting them in endian-correct
// PPC's long double has odd notions of endianness compared to how LLVM
// handles it: p[0] goes first for *big* endian on PPC.
- if (AP.TM.getDataLayout()->isBigEndian() &&
- !CFP->getType()->isPPC_FP128Ty()) {
+ if (AP.getDataLayout().isBigEndian() && !CFP->getType()->isPPC_FP128Ty()) {
int Chunk = API.getNumWords() - 1;
if (TrailingBytes)
- AP.OutStreamer.EmitIntValue(p[Chunk--], TrailingBytes);
+ AP.OutStreamer->EmitIntValue(p[Chunk--], TrailingBytes);
for (; Chunk >= 0; --Chunk)
- AP.OutStreamer.EmitIntValue(p[Chunk], sizeof(uint64_t));
+ AP.OutStreamer->EmitIntValue(p[Chunk], sizeof(uint64_t));
} else {
unsigned Chunk;
for (Chunk = 0; Chunk < NumBytes / sizeof(uint64_t); ++Chunk)
- AP.OutStreamer.EmitIntValue(p[Chunk], sizeof(uint64_t));
+ AP.OutStreamer->EmitIntValue(p[Chunk], sizeof(uint64_t));
if (TrailingBytes)
- AP.OutStreamer.EmitIntValue(p[Chunk], TrailingBytes);
+ AP.OutStreamer->EmitIntValue(p[Chunk], TrailingBytes);
}
// Emit the tail padding for the long double.
- const DataLayout &DL = *AP.TM.getDataLayout();
- AP.OutStreamer.EmitZeros(DL.getTypeAllocSize(CFP->getType()) -
- DL.getTypeStoreSize(CFP->getType()));
+ const DataLayout &DL = AP.getDataLayout();
+ AP.OutStreamer->EmitZeros(DL.getTypeAllocSize(CFP->getType()) -
+ DL.getTypeStoreSize(CFP->getType()));
}
static void emitGlobalConstantLargeInt(const ConstantInt *CI, AsmPrinter &AP) {
- const DataLayout *DL = AP.TM.getDataLayout();
+ const DataLayout &DL = AP.getDataLayout();
unsigned BitWidth = CI->getBitWidth();
// Copy the value as we may massage the layout for constants whose bit width
// Big endian:
// * Record the extra bits to emit.
// * Realign the raw data to emit the chunks of 64-bits.
- if (DL->isBigEndian()) {
+ if (DL.isBigEndian()) {
// Basically the structure of the raw data is a chunk of 64-bits cells:
// 0 1 BitWidth / 64
// [chunk1][chunk2] ... [chunkN].
// quantities at a time.
const uint64_t *RawData = Realigned.getRawData();
for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
- uint64_t Val = DL->isBigEndian() ? RawData[e - i - 1] : RawData[i];
- AP.OutStreamer.EmitIntValue(Val, 8);
+ uint64_t Val = DL.isBigEndian() ? RawData[e - i - 1] : RawData[i];
+ AP.OutStreamer->EmitIntValue(Val, 8);
}
if (ExtraBitsSize) {
// Emit the extra bits after the 64-bits chunks.
// Emit a directive that fills the expected size.
- uint64_t Size = AP.TM.getDataLayout()->getTypeAllocSize(
- CI->getType());
+ uint64_t Size = AP.getDataLayout().getTypeAllocSize(CI->getType());
Size -= (BitWidth / 64) * 8;
assert(Size && Size * 8 >= ExtraBitsSize &&
(ExtraBits & (((uint64_t)-1) >> (64 - ExtraBitsSize)))
== ExtraBits && "Directive too small for extra bits.");
- AP.OutStreamer.EmitIntValue(ExtraBits, Size);
+ AP.OutStreamer->EmitIntValue(ExtraBits, Size);
}
}
-static void emitGlobalConstantImpl(const Constant *CV, AsmPrinter &AP) {
- const DataLayout *DL = AP.TM.getDataLayout();
- uint64_t Size = DL->getTypeAllocSize(CV->getType());
+/// \brief Transform a not absolute MCExpr containing a reference to a GOT
+/// equivalent global, by a target specific GOT pc relative access to the
+/// final symbol.
+static void handleIndirectSymViaGOTPCRel(AsmPrinter &AP, const MCExpr **ME,
+ const Constant *BaseCst,
+ uint64_t Offset) {
+ // The global @foo below illustrates a global that uses a got equivalent.
+ //
+ // @bar = global i32 42
+ // @gotequiv = private unnamed_addr constant i32* @bar
+ // @foo = i32 trunc (i64 sub (i64 ptrtoint (i32** @gotequiv to i64),
+ // i64 ptrtoint (i32* @foo to i64))
+ // to i32)
+ //
+ // The cstexpr in @foo is converted into the MCExpr `ME`, where we actually
+ // check whether @foo is suitable to use a GOTPCREL. `ME` is usually in the
+ // form:
+ //
+ // foo = cstexpr, where
+ // cstexpr := <gotequiv> - "." + <cst>
+ // cstexpr := <gotequiv> - (<foo> - <offset from @foo base>) + <cst>
+ //
+ // After canonicalization by evaluateAsRelocatable `ME` turns into:
+ //
+ // cstexpr := <gotequiv> - <foo> + gotpcrelcst, where
+ // gotpcrelcst := <offset from @foo base> + <cst>
+ //
+ MCValue MV;
+ if (!(*ME)->evaluateAsRelocatable(MV, nullptr, nullptr) || MV.isAbsolute())
+ return;
+ const MCSymbolRefExpr *SymA = MV.getSymA();
+ if (!SymA)
+ return;
+
+ // Check that GOT equivalent symbol is cached.
+ const MCSymbol *GOTEquivSym = &SymA->getSymbol();
+ if (!AP.GlobalGOTEquivs.count(GOTEquivSym))
+ return;
+
+ const GlobalValue *BaseGV = dyn_cast_or_null<GlobalValue>(BaseCst);
+ if (!BaseGV)
+ return;
+
+ // Check for a valid base symbol
+ const MCSymbol *BaseSym = AP.getSymbol(BaseGV);
+ const MCSymbolRefExpr *SymB = MV.getSymB();
+
+ if (!SymB || BaseSym != &SymB->getSymbol())
+ return;
+
+ // Make sure to match:
+ //
+ // gotpcrelcst := <offset from @foo base> + <cst>
+ //
+ // If gotpcrelcst is positive it means that we can safely fold the pc rel
+ // displacement into the GOTPCREL. We can also can have an extra offset <cst>
+ // if the target knows how to encode it.
+ //
+ int64_t GOTPCRelCst = Offset + MV.getConstant();
+ if (GOTPCRelCst < 0)
+ return;
+ if (!AP.getObjFileLowering().supportGOTPCRelWithOffset() && GOTPCRelCst != 0)
+ return;
+
+ // Emit the GOT PC relative to replace the got equivalent global, i.e.:
+ //
+ // bar:
+ // .long 42
+ // gotequiv:
+ // .quad bar
+ // foo:
+ // .long gotequiv - "." + <cst>
+ //
+ // is replaced by the target specific equivalent to:
+ //
+ // bar:
+ // .long 42
+ // foo:
+ // .long bar@GOTPCREL+<gotpcrelcst>
+ //
+ AsmPrinter::GOTEquivUsePair Result = AP.GlobalGOTEquivs[GOTEquivSym];
+ const GlobalVariable *GV = Result.first;
+ int NumUses = (int)Result.second;
+ const GlobalValue *FinalGV = dyn_cast<GlobalValue>(GV->getOperand(0));
+ const MCSymbol *FinalSym = AP.getSymbol(FinalGV);
+ *ME = AP.getObjFileLowering().getIndirectSymViaGOTPCRel(
+ FinalSym, MV, Offset, AP.MMI, *AP.OutStreamer);
+
+ // Update GOT equivalent usage information
+ --NumUses;
+ if (NumUses >= 0)
+ AP.GlobalGOTEquivs[GOTEquivSym] = std::make_pair(GV, NumUses);
+}
+
+static void emitGlobalConstantImpl(const DataLayout &DL, const Constant *CV,
+ AsmPrinter &AP, const Constant *BaseCV,
+ uint64_t Offset) {
+ uint64_t Size = DL.getTypeAllocSize(CV->getType());
+
+ // Globals with sub-elements such as combinations of arrays and structs
+ // are handled recursively by emitGlobalConstantImpl. Keep track of the
+ // constant symbol base and the current position with BaseCV and Offset.
+ if (!BaseCV && CV->hasOneUse())
+ BaseCV = dyn_cast<Constant>(CV->user_back());
+
if (isa<ConstantAggregateZero>(CV) || isa<UndefValue>(CV))
- return AP.OutStreamer.EmitZeros(Size);
+ return AP.OutStreamer->EmitZeros(Size);
if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
switch (Size) {
case 4:
case 8:
if (AP.isVerbose())
- AP.OutStreamer.GetCommentOS() << format("0x%" PRIx64 "\n",
- CI->getZExtValue());
- AP.OutStreamer.EmitIntValue(CI->getZExtValue(), Size);
+ AP.OutStreamer->GetCommentOS() << format("0x%" PRIx64 "\n",
+ CI->getZExtValue());
+ AP.OutStreamer->EmitIntValue(CI->getZExtValue(), Size);
return;
default:
emitGlobalConstantLargeInt(CI, AP);
return emitGlobalConstantFP(CFP, AP);
if (isa<ConstantPointerNull>(CV)) {
- AP.OutStreamer.EmitIntValue(0, Size);
+ AP.OutStreamer->EmitIntValue(0, Size);
return;
}
if (const ConstantDataSequential *CDS = dyn_cast<ConstantDataSequential>(CV))
- return emitGlobalConstantDataSequential(CDS, AP);
+ return emitGlobalConstantDataSequential(DL, CDS, AP);
if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV))
- return emitGlobalConstantArray(CVA, AP);
+ return emitGlobalConstantArray(DL, CVA, AP, BaseCV, Offset);
if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
- return emitGlobalConstantStruct(CVS, AP);
+ return emitGlobalConstantStruct(DL, CVS, AP, BaseCV, Offset);
if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
// Look through bitcasts, which might not be able to be MCExpr'ized (e.g. of
// vectors).
if (CE->getOpcode() == Instruction::BitCast)
- return emitGlobalConstantImpl(CE->getOperand(0), AP);
+ return emitGlobalConstantImpl(DL, CE->getOperand(0), AP);
if (Size > 8) {
// If the constant expression's size is greater than 64-bits, then we have
// that way.
Constant *New = ConstantFoldConstantExpression(CE, DL);
if (New && New != CE)
- return emitGlobalConstantImpl(New, AP);
+ return emitGlobalConstantImpl(DL, New, AP);
}
}
if (const ConstantVector *V = dyn_cast<ConstantVector>(CV))
- return emitGlobalConstantVector(V, AP);
+ return emitGlobalConstantVector(DL, V, AP);
// Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it
// thread the streamer with EmitValue.
- AP.OutStreamer.EmitValue(AP.lowerConstant(CV), Size);
+ const MCExpr *ME = AP.lowerConstant(CV);
+
+ // Since lowerConstant already folded and got rid of all IR pointer and
+ // integer casts, detect GOT equivalent accesses by looking into the MCExpr
+ // directly.
+ if (AP.getObjFileLowering().supportIndirectSymViaGOTPCRel())
+ handleIndirectSymViaGOTPCRel(AP, &ME, BaseCV, Offset);
+
+ AP.OutStreamer->EmitValue(ME, Size);
}
/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
-void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
- uint64_t Size =
- TM.getDataLayout()->getTypeAllocSize(CV->getType());
+void AsmPrinter::EmitGlobalConstant(const DataLayout &DL, const Constant *CV) {
+ uint64_t Size = DL.getTypeAllocSize(CV->getType());
if (Size)
- emitGlobalConstantImpl(CV, *this);
+ emitGlobalConstantImpl(DL, CV, *this);
else if (MAI->hasSubsectionsViaSymbols()) {
// If the global has zero size, emit a single byte so that two labels don't
// look like they are at the same location.
- OutStreamer.EmitIntValue(0, 1);
+ OutStreamer->EmitIntValue(0, 1);
}
}
// Symbol Lowering Routines.
//===----------------------------------------------------------------------===//
-/// GetTempSymbol - Return the MCSymbol corresponding to the assembler
-/// temporary label with the specified stem and unique ID.
-MCSymbol *AsmPrinter::GetTempSymbol(Twine Name, unsigned ID) const {
- const DataLayout *DL = TM.getDataLayout();
- return OutContext.GetOrCreateSymbol(Twine(DL->getPrivateGlobalPrefix()) +
- Name + Twine(ID));
-}
-
-/// GetTempSymbol - Return an assembler temporary label with the specified
-/// stem.
-MCSymbol *AsmPrinter::GetTempSymbol(Twine Name) const {
- const DataLayout *DL = TM.getDataLayout();
- return OutContext.GetOrCreateSymbol(Twine(DL->getPrivateGlobalPrefix())+
- Name);
+MCSymbol *AsmPrinter::createTempSymbol(const Twine &Name) const {
+ return OutContext.createTempSymbol(Name, true);
}
-
MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const {
return MMI->getAddrLabelSymbol(BA->getBasicBlock());
}
/// GetCPISymbol - Return the symbol for the specified constant pool entry.
MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const {
- const DataLayout *DL = TM.getDataLayout();
- return OutContext.GetOrCreateSymbol
- (Twine(DL->getPrivateGlobalPrefix()) + "CPI" + Twine(getFunctionNumber())
- + "_" + Twine(CPID));
+ const DataLayout &DL = getDataLayout();
+ return OutContext.getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
+ "CPI" + Twine(getFunctionNumber()) + "_" +
+ Twine(CPID));
}
/// GetJTISymbol - Return the symbol for the specified jump table entry.
/// GetJTSetSymbol - Return the symbol for the specified jump table .set
/// FIXME: privatize to AsmPrinter.
MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const {
- const DataLayout *DL = TM.getDataLayout();
- return OutContext.GetOrCreateSymbol
- (Twine(DL->getPrivateGlobalPrefix()) + Twine(getFunctionNumber()) + "_" +
- Twine(UID) + "_set_" + Twine(MBBID));
+ const DataLayout &DL = getDataLayout();
+ return OutContext.getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
+ Twine(getFunctionNumber()) + "_" +
+ Twine(UID) + "_set_" + Twine(MBBID));
}
MCSymbol *AsmPrinter::getSymbolWithGlobalValueBase(const GlobalValue *GV,
TM);
}
-/// GetExternalSymbolSymbol - Return the MCSymbol for the specified
-/// ExternalSymbol.
+/// Return the MCSymbol for the specified ExternalSymbol.
MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const {
SmallString<60> NameStr;
- Mang->getNameWithPrefix(NameStr, Sym);
- return OutContext.GetOrCreateSymbol(NameStr.str());
+ Mangler::getNameWithPrefix(NameStr, Sym, getDataLayout());
+ return OutContext.getOrCreateSymbol(NameStr);
}
// If this block is not a loop header, just print out what is the loop header
// and return.
if (Header != &MBB) {
- AP.OutStreamer.AddComment(" in Loop: Header=BB" +
- Twine(AP.getFunctionNumber())+"_" +
- Twine(Loop->getHeader()->getNumber())+
- " Depth="+Twine(Loop->getLoopDepth()));
+ AP.OutStreamer->AddComment(" in Loop: Header=BB" +
+ Twine(AP.getFunctionNumber())+"_" +
+ Twine(Loop->getHeader()->getNumber())+
+ " Depth="+Twine(Loop->getLoopDepth()));
return;
}
// Otherwise, it is a loop header. Print out information about child and
// parent loops.
- raw_ostream &OS = AP.OutStreamer.GetCommentOS();
+ raw_ostream &OS = AP.OutStreamer->GetCommentOS();
PrintParentLoopComment(OS, Loop->getParentLoop(), AP.getFunctionNumber());
/// MachineBasicBlock, an alignment (if present) and a comment describing
/// it if appropriate.
void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock &MBB) const {
+ // End the previous funclet and start a new one.
+ if (MBB.isEHFuncletEntry()) {
+ for (const HandlerInfo &HI : Handlers) {
+ HI.Handler->endFunclet();
+ HI.Handler->beginFunclet(MBB);
+ }
+ }
+
// Emit an alignment directive for this block, if needed.
if (unsigned Align = MBB.getAlignment())
EmitAlignment(Align);
if (MBB.hasAddressTaken()) {
const BasicBlock *BB = MBB.getBasicBlock();
if (isVerbose())
- OutStreamer.AddComment("Block address taken");
+ OutStreamer->AddComment("Block address taken");
- std::vector<MCSymbol*> Symbols = MMI->getAddrLabelSymbolToEmit(BB);
- for (auto *Sym : Symbols)
- OutStreamer.EmitLabel(Sym);
+ // MBBs can have their address taken as part of CodeGen without having
+ // their corresponding BB's address taken in IR
+ if (BB->hasAddressTaken())
+ for (MCSymbol *Sym : MMI->getAddrLabelSymbolToEmit(BB))
+ OutStreamer->EmitLabel(Sym);
}
// Print some verbose block comments.
if (isVerbose()) {
- if (const BasicBlock *BB = MBB.getBasicBlock())
- if (BB->hasName())
- OutStreamer.AddComment("%" + BB->getName());
+ if (const BasicBlock *BB = MBB.getBasicBlock()) {
+ if (BB->hasName()) {
+ BB->printAsOperand(OutStreamer->GetCommentOS(),
+ /*PrintType=*/false, BB->getModule());
+ OutStreamer->GetCommentOS() << '\n';
+ }
+ }
emitBasicBlockLoopComments(MBB, LI, *this);
}
// Print the main label for the block.
- if (MBB.pred_empty() || isBlockOnlyReachableByFallthrough(&MBB)) {
+ if (MBB.pred_empty() ||
+ (isBlockOnlyReachableByFallthrough(&MBB) && !MBB.isEHFuncletEntry())) {
if (isVerbose()) {
// NOTE: Want this comment at start of line, don't emit with AddComment.
- OutStreamer.emitRawComment(" BB#" + Twine(MBB.getNumber()) + ":", false);
+ OutStreamer->emitRawComment(" BB#" + Twine(MBB.getNumber()) + ":", false);
}
} else {
- OutStreamer.EmitLabel(MBB.getSymbol());
+ OutStreamer->EmitLabel(MBB.getSymbol());
}
}
}
if (Attr != MCSA_Invalid)
- OutStreamer.EmitSymbolAttribute(Sym, Attr);
+ OutStreamer->EmitSymbolAttribute(Sym, Attr);
}
/// isBlockOnlyReachableByFallthough - Return true if the basic block has
isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const {
// If this is a landing pad, it isn't a fall through. If it has no preds,
// then nothing falls through to it.
- if (MBB->isLandingPad() || MBB->pred_empty())
+ if (MBB->isEHPad() || MBB->pred_empty())
return false;
// If there isn't exactly one predecessor, it can't be a fall through.
/// Pin vtable to this file.
AsmPrinterHandler::~AsmPrinterHandler() {}
+
+void AsmPrinterHandler::markFunctionEnd() {}
projects / oota-llvm.git / blobdiff