#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/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)
return NumBits;
}
-AsmPrinter::AsmPrinter(TargetMachine &tm, MCStreamer &Streamer)
+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), 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 = Streamer.isVerboseAsm();
+ VerboseAsm = OutStreamer->isVerboseAsm();
}
AsmPrinter::~AsmPrinter() {
delete &GCMap;
GCMetadataPrinters = nullptr;
}
-
- delete &OutStreamer;
}
/// getFunctionNumber - Return a unique ID for the current function.
}
const TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
- return TM.getSubtargetImpl()->getTargetLowering()->getObjFileLowering();
+ return *TM.getObjFileLowering();
}
/// getDataLayout - Return information about data layout.
const DataLayout &AsmPrinter::getDataLayout() const {
- return *TM.getSubtargetImpl()->getDataLayout();
+ return *TM.getDataLayout();
}
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) {
/// 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.getSubtargetImpl()->getDataLayout());
+ Mang = new Mangler(TM.getDataLayout());
// Emit the version-min deplyment target directive if needed.
//
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);
+ OutStreamer->EmitVersionMin((TT.isMacOSX() ?
+ MCVM_OSXVersionMin : MCVM_IOSVersionMin),
+ 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(), TM.getTargetCPU(), TM.getTargetFeatureString()));
+ OutStreamer->AddComment("Start of file scope inline assembly");
+ OutStreamer->AddBlankLine();
+ EmitInlineAsm(M.getModuleInlineAsm()+"\n", *STI, TM.Options.MCOptions);
+ OutStreamer->AddComment("End of file scope inline assembly");
+ OutStreamer->AddBlankLine();
}
if (MAI->doesSupportDebugInformation()) {
- if (Triple(TM.getTargetTriple()).isKnownWindowsMSVCEnvironment())
+ bool skip_dwarf = false;
+ if (Triple(TM.getTargetTriple()).isKnownWindowsMSVCEnvironment()) {
Handlers.push_back(HandlerInfo(new WinCodeViewLineTables(this),
DbgTimerName,
CodeViewLineTablesGroupName));
- DD = new DwarfDebug(this, &M);
- Handlers.push_back(HandlerInfo(DD, DbgTimerName, DWARFGroupName));
+ // 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) {
+ DD = new DwarfDebug(this, &M);
+ Handlers.push_back(HandlerInfo(DD, DbgTimerName, DWARFGroupName));
+ }
}
EHStreamer *ES = nullptr;
case ExceptionHandling::ARM:
ES = new ARMException(this);
break;
- case ExceptionHandling::ItaniumWinEH:
+ 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:
if (EmitSpecialLLVMGlobal(GV))
return;
+ // 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()) {
- GV->printAsOperand(OutStreamer.GetCommentOS(),
+ GV->printAsOperand(OutStreamer->GetCommentOS(),
/*PrintType=*/false, GV->getParent());
- OutStreamer.GetCommentOS() << '\n';
+ OutStreamer->GetCommentOS() << '\n';
}
}
if (!GV->hasInitializer()) // External globals require no extra code.
return;
+ GVSym->redefineIfPossible();
+ if (GVSym->isDefined() || GVSym->isVariable())
+ report_fatal_error("symbol '" + Twine(GVSym->getName()) +
+ "' is already defined");
+
if (MAI->hasDotTypeDotSizeDirective())
- OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject);
+ OutStreamer->EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject);
SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM);
- const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout();
+ const DataLayout *DL = TM.getDataLayout();
uint64_t Size = DL->getTypeAllocSize(GV->getType()->getElementType());
// If the alignment is specified, we *must* obey it. Overaligning a global
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);
+ MCSection *TheSection =
+ getObjFileLowering().SectionForGlobal(GV, GVKind, *Mang, TM);
// Handle the zerofill directive on darwin, which is a special form of BSS
// emission.
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;
}
if (GVKind.isThreadLocal() && MAI->hasMachoTBSSDirective()) {
// 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());
}
- 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"),
+ 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);
EmitAlignment(AlignLog, GV);
- OutStreamer.EmitLabel(GVSym);
+ OutStreamer->EmitLabel(GVSym);
EmitGlobalConstant(GV->getInitializer());
if (MAI->hasDotTypeDotSizeDirective())
// .size foo, 42
- OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext));
+ OutStreamer->emitELFSize(cast<MCSymbolELF>(GVSym),
+ 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.
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.
/// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the
/// function. This can be overridden by targets as required to do custom stuff.
void AsmPrinter::EmitFunctionEntryLabel() {
+ CurrentFnSym->redefineIfPossible();
+
// The function label could have already been emitted if two symbols end up
// conflicting due to asm renaming. Detect this and emit an error.
- if (CurrentFnSym->isUndefined())
- return OutStreamer.EmitLabel(CurrentFnSym);
+ if (CurrentFnSym->isVariable())
+ report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
+ "' is a protected alias");
+ if (CurrentFnSym->isDefined())
+ report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
+ "' label emitted multiple times to assembly file");
- report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
- "' label emitted multiple times to assembly file");
+ 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();
+ OutStreamer->AddComment(Twine("implicit-def: ") +
+ MMI->getContext().getRegisterInfo()->getName(RegNo));
+ OutStreamer->AddBlankLine();
}
static void emitKill(const MachineInstr *MI, AsmPrinter &AP) {
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 += AP.MMI->getContext().getRegisterInfo()->getName(Op.getReg());
Str += (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.isVariablePiece())
- OS << " [piece offset=" << Expr.getPieceOffset()
- << " size=" << Expr.getPieceSize() << "]";
+ 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.
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 << AP.MMI->getContext().getRegisterInfo()->getName(Reg);
}
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;
}
}
bool AsmPrinter::needsSEHMoves() {
- return MAI->getExceptionHandlingType() == ExceptionHandling::ItaniumWinEH &&
- MF->getFunction()->needsUnwindTableEntry();
+ return MAI->usesWindowsCFI() && MF->getFunction()->needsUnwindTableEntry();
}
void AsmPrinter::emitCFIInstruction(const MachineInstr &MI) {
emitCFIInstruction(CFI);
}
+void AsmPrinter::emitFrameAlloc(const MachineInstr &MI) {
+ // The operands are the MCSymbol and the frame offset of the allocation.
+ MCSymbol *FrameAllocSym = MI.getOperand(0).getMCSymbol();
+ int FrameOffset = MI.getOperand(1).getImm();
+
+ // Emit a symbol assignment.
+ 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:
+ 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() ||
+ 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);
+ }
}
-static const MCExpr *lowerConstant(const Constant *CV, AsmPrinter &AP);
+/// \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())
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);
+
+ Triple TT(TM.getTargetTriple());
+ if (TT.isOSBinFormatELF()) {
+ MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
+
+ // Output stubs for external and common global variables.
+ MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
+ if (!Stubs.empty()) {
+ OutStreamer->SwitchSection(TLOF.getDataRelSection());
+ const DataLayout *DL = TM.getDataLayout();
+
+ for (const auto &Stub : Stubs) {
+ OutStreamer->EmitLabel(Stub.first);
+ OutStreamer->EmitSymbolValue(Stub.second.getPointer(),
+ DL->getPointerSize());
+ }
+ }
+ }
// Make sure we wrote out everything we need.
- OutStreamer.Flush();
+ OutStreamer->Flush();
// 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");
EmitVisibility(Name, Alias.getVisibility());
// Emit the directives as assignments aka .set:
- OutStreamer.EmitAssignment(Name, lowerConstant(Alias.getAliasee(), *this));
+ OutStreamer->EmitAssignment(Name, lowerConstant(Alias.getAliasee()));
}
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
// Emit llvm.ident metadata in an '.ident' directive.
EmitModuleIdents(M);
+ // Emit __morestack address if needed for indirect calls.
+ if (MMI->usesMorestackAddr()) {
+ MCSection *ReadOnlySection =
+ getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly(),
+ /*C=*/nullptr);
+ OutStreamer->SwitchSection(ReadOnlySection);
+
+ MCSymbol *AddrSymbol =
+ OutContext.getOrCreateSymbol(StringRef("__morestack_addr"));
+ OutStreamer->EmitLabel(AddrSymbol);
+
+ unsigned PtrSize = TM.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() ||
+ 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) {}
};
}
unsigned Align = CPE.getAlignment();
SectionKind Kind =
- CPE.getSectionKind(TM.getSubtargetImpl()->getDataLayout());
+ CPE.getSectionKind(TM.getDataLayout());
const Constant *C = nullptr;
if (!CPE.isMachineConstantPoolEntry())
C = CPE.Val.ConstVal;
- const MCSection *S = getObjFileLowering().getSectionForConstant(Kind, C);
+ MCSection *S = getObjFileLowering().getSectionForConstant(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.getSubtargetImpl()->getDataLayout()->getTypeAllocSize(Ty);
+ TM.getDataLayout()->getTypeAllocSize(Ty);
- OutStreamer.EmitLabel(Sym);
+ OutStreamer->EmitLabel(Sym);
if (CPE.isMachineConstantPoolEntry())
EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
else
/// by the current function to the current output stream.
///
void AsmPrinter::EmitJumpTableInfo() {
- const DataLayout *DL = MF->getSubtarget().getDataLayout();
+ const DataLayout *DL = MF->getTarget().getDataLayout();
const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
if (!MJTI) return;
if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline) return;
// Pick the directive to use to print the jump table entries, and switch to
// the appropriate section.
const Function *F = MF->getFunction();
- bool JTInDiffSection = false;
- if (// In PIC mode, we need to emit the jump table to the same section as the
- // function body itself, otherwise the label differences won't make sense.
- // FIXME: Need a better predicate for this: what about custom entries?
- MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 ||
- // We should also do if the section name is NULL or function is declared
- // in discardable section
- // FIXME: this isn't the right predicate, should be based on the MCSection
- // for the function.
- F->isWeakForLinker()) {
- OutStreamer.SwitchSection(
- getObjFileLowering().SectionForGlobal(F, *Mang, TM));
- } else {
- // Otherwise, drop it in the readonly section.
- const MCSection *ReadOnlySection =
- getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly(),
- /*C=*/nullptr);
- OutStreamer.SwitchSection(ReadOnlySection);
- JTInDiffSection = true;
+ const TargetLoweringObjectFile &TLOF = getObjFileLowering();
+ bool JTInDiffSection = !TLOF.shouldPutJumpTableInFunctionSection(
+ MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32,
+ *F);
+ if (JTInDiffSection) {
+ // Drop it in the readonly section.
+ MCSection *ReadOnlySection = TLOF.getSectionForJumpTable(*F, *Mang, TM);
+ OutStreamer->SwitchSection(ReadOnlySection);
}
EmitAlignment(Log2_32(
- MJTI->getEntryAlignment(*TM.getSubtargetImpl()->getDataLayout())));
+ MJTI->getEntryAlignment(*TM.getDataLayout())));
// 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));
}
}
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.getSubtargetImpl()->getDataLayout());
- OutStreamer.EmitValue(Value, EntrySize);
+ MJTI->getEntrySize(*TM.getDataLayout());
+ OutStreamer->EmitValue(Value, EntrySize);
}
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 (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);
}
}
}
// Emit the function pointers in the target-specific order
- const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout();
+ const DataLayout *DL = TM.getDataLayout();
unsigned Align = Log2_32(DL->getPointerPrefAlignment());
std::stable_sort(Structors.begin(), Structors.end(),
[](const Structor &L,
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);
}
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.getSubtargetImpl()->getDataLayout(),
+ NumBits = getGVAlignmentLog2(GV, *TM.getDataLayout(),
NumBits);
if (NumBits == 0) return; // 1-byte aligned: no need to emit alignment.
- assert(NumBits < std::numeric_limits<unsigned>::digits &&
+ assert(NumBits <
+ 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);
}
//===----------------------------------------------------------------------===//
// Constant emission.
//===----------------------------------------------------------------------===//
-/// lowerConstant - Lower the specified LLVM Constant to an MCExpr.
-///
-static const MCExpr *lowerConstant(const Constant *CV, AsmPrinter &AP) {
- MCContext &Ctx = AP.OutContext;
+const MCExpr *AsmPrinter::lowerConstant(const Constant *CV) {
+ 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(AP.getSymbol(GV), Ctx);
+ return MCSymbolRefExpr::create(getSymbol(GV), Ctx);
if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV))
- return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx);
+ return MCSymbolRefExpr::create(GetBlockAddressSymbol(BA), Ctx);
const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV);
if (!CE) {
llvm_unreachable("Unknown constant value to lower!");
}
- if (const MCExpr *RelocExpr =
- AP.getObjFileLowering().getExecutableRelativeSymbol(CE, *AP.Mang,
- AP.TM))
+ if (const MCExpr *RelocExpr
+ = getObjFileLowering().getExecutableRelativeSymbol(CE, *Mang, TM))
return RelocExpr;
switch (CE->getOpcode()) {
// 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, AP.TM.getSubtargetImpl()->getDataLayout()))
+ if (Constant *C = ConstantFoldConstantExpression(CE, *TM.getDataLayout()))
if (C != CE)
- return lowerConstant(C, AP);
+ return lowerConstant(C);
// Otherwise report the problem to the user.
{
raw_string_ostream OS(S);
OS << "Unsupported expression in static initializer: ";
CE->printAsOperand(OS, /*PrintType=*/false,
- !AP.MF ? nullptr : AP.MF->getFunction()->getParent());
+ !MF ? nullptr : MF->getFunction()->getParent());
report_fatal_error(OS.str());
}
case Instruction::GetElementPtr: {
- const DataLayout &DL = *AP.TM.getSubtargetImpl()->getDataLayout();
+ 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);
- const MCExpr *Base = lowerConstant(CE->getOperand(0), AP);
+ 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);
}
// is reasonable to treat their delta as a 32-bit value.
// FALL THROUGH.
case Instruction::BitCast:
- return lowerConstant(CE->getOperand(0), AP);
+ return lowerConstant(CE->getOperand(0));
case Instruction::IntToPtr: {
- const DataLayout &DL = *AP.TM.getSubtargetImpl()->getDataLayout();
+ const DataLayout &DL = *TM.getDataLayout();
+
// Handle casts to pointers by changing them into casts to the appropriate
// integer type. This promotes constant folding and simplifies this code.
Constant *Op = CE->getOperand(0);
Op = ConstantExpr::getIntegerCast(Op, DL.getIntPtrType(CV->getType()),
false/*ZExt*/);
- return lowerConstant(Op, AP);
+ return lowerConstant(Op);
}
case Instruction::PtrToInt: {
- const DataLayout &DL = *AP.TM.getSubtargetImpl()->getDataLayout();
+ const DataLayout &DL = *TM.getDataLayout();
+
// Support only foldable casts to/from pointers that can be eliminated by
// changing the pointer to the appropriately sized integer type.
Constant *Op = CE->getOperand(0);
Type *Ty = CE->getType();
- const MCExpr *OpExpr = lowerConstant(Op, AP);
+ const MCExpr *OpExpr = lowerConstant(Op);
// We can emit the pointer value into this slot if the slot is an
// integer slot equal to the size of the pointer.
// 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
case Instruction::And:
case Instruction::Or:
case Instruction::Xor: {
- const MCExpr *LHS = lowerConstant(CE->getOperand(0), AP);
- const MCExpr *RHS = lowerConstant(CE->getOperand(1), AP);
+ const MCExpr *LHS = lowerConstant(CE->getOperand(0));
+ 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 Constant *C, AsmPrinter &AP,
+ const Constant *BaseCV = nullptr,
+ uint64_t Offset = 0);
/// isRepeatedByteSequence - Determine whether the given value is
/// composed of a repeated sequence of identical bytes and return the
if (CI->getBitWidth() > 64) return -1;
uint64_t Size =
- TM.getSubtargetImpl()->getDataLayout()->getTypeAllocSize(V->getType());
+ TM.getDataLayout()->getTypeAllocSize(V->getType());
uint64_t Value = CI->getZExtValue();
// Make sure the constant is at least 8 bits long and has a power
int Value = isRepeatedByteSequence(CDS, AP.TM);
if (Value != -1) {
uint64_t Bytes =
- AP.TM.getSubtargetImpl()->getDataLayout()->getTypeAllocSize(
+ AP.TM.getDataLayout()->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);
+ 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
F = CDS->getElementAsFloat(i);
if (AP.isVerbose())
- AP.OutStreamer.GetCommentOS() << "float " << F << '\n';
- AP.OutStreamer.EmitIntValue(I, 4);
+ AP.OutStreamer->GetCommentOS() << "float " << F << '\n';
+ AP.OutStreamer->EmitIntValue(I, 4);
}
} else {
assert(CDS->getElementType()->isDoubleTy());
F = CDS->getElementAsDouble(i);
if (AP.isVerbose())
- AP.OutStreamer.GetCommentOS() << "double " << F << '\n';
- AP.OutStreamer.EmitIntValue(I, 8);
+ AP.OutStreamer->GetCommentOS() << "double " << F << '\n';
+ AP.OutStreamer->EmitIntValue(I, 8);
}
}
- const DataLayout &DL = *AP.TM.getSubtargetImpl()->getDataLayout();
+ 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 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);
+ const DataLayout &DL = *AP.TM.getDataLayout();
if (Value != -1) {
- uint64_t Bytes =
- AP.TM.getSubtargetImpl()->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(CA->getOperand(i), AP, BaseCV, Offset);
+ Offset += DL.getTypeAllocSize(CA->getOperand(i)->getType());
+ }
}
}
for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
emitGlobalConstantImpl(CV->getOperand(i), AP);
- const DataLayout &DL = *AP.TM.getSubtargetImpl()->getDataLayout();
+ 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 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.getSubtargetImpl()->getDataLayout();
+ const DataLayout *DL = AP.TM.getDataLayout();
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(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 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.getSubtargetImpl()->getDataLayout()->isBigEndian() &&
+ if (AP.TM.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.getSubtargetImpl()->getDataLayout();
- AP.OutStreamer.EmitZeros(DL.getTypeAllocSize(CFP->getType()) -
- DL.getTypeStoreSize(CFP->getType()));
+ const DataLayout &DL = *AP.TM.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.getSubtargetImpl()->getDataLayout();
+ const DataLayout *DL = AP.TM.getDataLayout();
unsigned BitWidth = CI->getBitWidth();
// Copy the value as we may massage the layout for constants whose bit width
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);
+ 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.getSubtargetImpl()->getDataLayout()->getTypeAllocSize(
+ uint64_t Size = AP.TM.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.getSubtargetImpl()->getDataLayout();
+/// \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 MCSymbol *GOTEquivSym = &MV.getSymA()->getSymbol();
+ if (!AP.GlobalGOTEquivs.count(GOTEquivSym))
+ return;
+
+ const GlobalValue *BaseGV = dyn_cast<GlobalValue>(BaseCst);
+ if (!BaseGV)
+ return;
+
+ const MCSymbol *BaseSym = AP.getSymbol(BaseGV);
+ if (BaseSym != &MV.getSymB()->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 Constant *CV, AsmPrinter &AP,
+ const Constant *BaseCV, uint64_t Offset) {
+ const DataLayout *DL = AP.TM.getDataLayout();
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;
}
return emitGlobalConstantDataSequential(CDS, AP);
if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV))
- return emitGlobalConstantArray(CVA, AP);
+ return emitGlobalConstantArray(CVA, AP, BaseCV, Offset);
if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
- return emitGlobalConstantStruct(CVS, AP);
+ return emitGlobalConstantStruct(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
// If the constant expression's size is greater than 64-bits, then we have
// to emit the value in chunks. Try to constant fold the value and emit it
// that way.
- Constant *New = ConstantFoldConstantExpression(CE, DL);
+ Constant *New = ConstantFoldConstantExpression(CE, *DL);
if (New && New != CE)
return emitGlobalConstantImpl(New, AP);
}
// Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it
// thread the streamer with EmitValue.
- AP.OutStreamer.EmitValue(lowerConstant(CV, AP), 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.getSubtargetImpl()->getDataLayout()->getTypeAllocSize(CV->getType());
+ TM.getDataLayout()->getTypeAllocSize(CV->getType());
if (Size)
emitGlobalConstantImpl(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.getSubtargetImpl()->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.getSubtargetImpl()->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.getSubtargetImpl()->getDataLayout();
- return OutContext.GetOrCreateSymbol
+ const DataLayout *DL = TM.getDataLayout();
+ return OutContext.getOrCreateSymbol
(Twine(DL->getPrivateGlobalPrefix()) + "CPI" + Twine(getFunctionNumber())
+ "_" + Twine(CPID));
}
/// 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.getSubtargetImpl()->getDataLayout();
- return OutContext.GetOrCreateSymbol
+ const DataLayout *DL = TM.getDataLayout();
+ return OutContext.getOrCreateSymbol
(Twine(DL->getPrivateGlobalPrefix()) + Twine(getFunctionNumber()) + "_" +
Twine(UID) + "_set_" + Twine(MBBID));
}
MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const {
SmallString<60> NameStr;
Mang->getNameWithPrefix(NameStr, Sym);
- return OutContext.GetOrCreateSymbol(NameStr.str());
+ 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());
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);
+ OutStreamer->EmitLabel(Sym);
}
// Print some verbose block comments.
if (isVerbose()) {
if (const BasicBlock *BB = MBB.getBasicBlock())
if (BB->hasName())
- OutStreamer.AddComment("%" + BB->getName());
+ OutStreamer->AddComment("%" + BB->getName());
emitBasicBlockLoopComments(MBB, LI, *this);
}
if (MBB.pred_empty() || isBlockOnlyReachableByFallthrough(&MBB)) {
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
if (!S.usesMetadata())
return nullptr;
+ assert(!S.useStatepoints() && "statepoints do not currently support custom"
+ " stackmap formats, please see the documentation for a description of"
+ " the default format. If you really need a custom serialized format,"
+ " please file a bug");
+
gcp_map_type &GCMap = getGCMap(GCMetadataPrinters);
gcp_map_type::iterator GCPI = GCMap.find(&S);
if (GCPI != GCMap.end())
/// Pin vtable to this file.
AsmPrinterHandler::~AsmPrinterHandler() {}
+
+void AsmPrinterHandler::markFunctionEnd() {}
projects / oota-llvm.git / blobdiff