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Further MCize ARM constant pool values. This allows basic PIC references for
object file emission. llvm-svn: 118601
This commit is contained in:
Jim Grosbach
parent
abe68922ca
commit
2c60dfb555
@ -227,73 +227,7 @@ namespace {
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/// EmitMachineConstantPoolValue - Print a machine constantpool value to
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/// the .s file.
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virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
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int Size = TM.getTargetData()->getTypeAllocSize(MCPV->getType());
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ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
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SmallString<128> Str;
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raw_svector_ostream OS(Str);
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if (ACPV->isLSDA()) {
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OS << MAI->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
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} else if (ACPV->isBlockAddress()) {
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OS << *GetBlockAddressSymbol(ACPV->getBlockAddress());
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} else if (ACPV->isGlobalValue()) {
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const GlobalValue *GV = ACPV->getGV();
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bool isIndirect = Subtarget->isTargetDarwin() &&
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Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
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if (!isIndirect)
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OS << *Mang->getSymbol(GV);
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else {
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// FIXME: Remove this when Darwin transition to @GOT like syntax.
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MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
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OS << *Sym;
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MachineModuleInfoMachO &MMIMachO =
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MMI->getObjFileInfo<MachineModuleInfoMachO>();
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MachineModuleInfoImpl::StubValueTy &StubSym =
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GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(Sym) :
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MMIMachO.getGVStubEntry(Sym);
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if (StubSym.getPointer() == 0)
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StubSym = MachineModuleInfoImpl::
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StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
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}
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} else {
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assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
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OS << *GetExternalSymbolSymbol(ACPV->getSymbol());
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}
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// Create an MCSymbol for the reference.
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MCSymbol *MCSym = OutContext.GetOrCreateSymbol(OS.str());
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const MCExpr *Expr = MCSymbolRefExpr::Create(MCSym, OutContext);
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// FIXME: Model the whole expression an an MCExpr and we can get rid
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// of this hasRawTextSupport() clause and just do an EmitValue().
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if (OutStreamer.hasRawTextSupport()) {
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if (ACPV->hasModifier()) OS << "(" << ACPV->getModifier() << ")";
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if (ACPV->getPCAdjustment() != 0) {
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OS << "-(" << MAI->getPrivateGlobalPrefix() << "PC"
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<< getFunctionNumber() << "_" << ACPV->getLabelId()
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<< "+" << (unsigned)ACPV->getPCAdjustment();
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if (ACPV->mustAddCurrentAddress())
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OS << "-.";
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OS << ')';
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}
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const char *DataDirective = 0;
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switch (Size) {
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case 1: DataDirective = MAI->getData8bitsDirective(0); break;
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case 2: DataDirective = MAI->getData16bitsDirective(0); break;
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case 4: DataDirective = MAI->getData32bitsDirective(0); break;
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default: assert(0 && "Unknown CPV size");
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}
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Twine Text(DataDirective, OS.str());
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OutStreamer.EmitRawText(Text);
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} else {
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assert(!ACPV->hasModifier() && ACPV->getPCAdjustment() == 0 &&
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"ARM binary streamer of non-trivial constant pool value!");
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OutStreamer.EmitValue(Expr, Size);
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}
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}
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virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
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};
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} // end of anonymous namespace
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@ -669,6 +603,88 @@ static MCSymbol *getPICLabel(const char *Prefix, unsigned FunctionNumber,
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return Label;
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}
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void ARMAsmPrinter::
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EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
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int Size = TM.getTargetData()->getTypeAllocSize(MCPV->getType());
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ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
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SmallString<128> Str;
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raw_svector_ostream OS(Str);
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if (ACPV->isLSDA()) {
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OS << MAI->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
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} else if (ACPV->isBlockAddress()) {
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OS << *GetBlockAddressSymbol(ACPV->getBlockAddress());
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} else if (ACPV->isGlobalValue()) {
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const GlobalValue *GV = ACPV->getGV();
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bool isIndirect = Subtarget->isTargetDarwin() &&
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Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
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if (!isIndirect)
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OS << *Mang->getSymbol(GV);
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else {
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// FIXME: Remove this when Darwin transition to @GOT like syntax.
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MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
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OS << *Sym;
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MachineModuleInfoMachO &MMIMachO =
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MMI->getObjFileInfo<MachineModuleInfoMachO>();
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MachineModuleInfoImpl::StubValueTy &StubSym =
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GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(Sym) :
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MMIMachO.getGVStubEntry(Sym);
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if (StubSym.getPointer() == 0)
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StubSym = MachineModuleInfoImpl::
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StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
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}
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} else {
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assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
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OS << *GetExternalSymbolSymbol(ACPV->getSymbol());
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}
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// Create an MCSymbol for the reference.
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MCSymbol *MCSym = OutContext.GetOrCreateSymbol(OS.str());
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const MCExpr *Expr = MCSymbolRefExpr::Create(MCSym, OutContext);
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// FIXME: Model the whole expression an an MCExpr and we can get rid
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// of this hasRawTextSupport() clause and just do an EmitValue().
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if (OutStreamer.hasRawTextSupport()) {
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if (ACPV->hasModifier()) OS << "(" << ACPV->getModifier() << ")";
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if (ACPV->getPCAdjustment() != 0) {
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OS << "-(" << MAI->getPrivateGlobalPrefix() << "PC"
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<< getFunctionNumber() << "_" << ACPV->getLabelId()
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<< "+" << (unsigned)ACPV->getPCAdjustment();
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if (ACPV->mustAddCurrentAddress())
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OS << "-.";
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OS << ')';
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}
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const char *DataDirective = 0;
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switch (Size) {
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case 1: DataDirective = MAI->getData8bitsDirective(0); break;
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case 2: DataDirective = MAI->getData16bitsDirective(0); break;
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case 4: DataDirective = MAI->getData32bitsDirective(0); break;
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default: assert(0 && "Unknown CPV size");
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}
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Twine Text(DataDirective, OS.str());
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OutStreamer.EmitRawText(Text);
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} else {
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assert(!ACPV->hasModifier() && !ACPV->mustAddCurrentAddress() &&
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"ARM binary streamer of non-trivial constant pool value!");
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if (ACPV->getPCAdjustment()) {
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MCSymbol *PCLabel = getPICLabel(MAI->getPrivateGlobalPrefix(),
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getFunctionNumber(),
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ACPV->getLabelId(),
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OutContext);
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const MCExpr *PCRelExpr = MCSymbolRefExpr::Create(PCLabel, OutContext);
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PCRelExpr =
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MCBinaryExpr::CreateAdd(PCRelExpr,
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MCConstantExpr::Create(ACPV->getPCAdjustment(),
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OutContext),
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OutContext);
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Expr = MCBinaryExpr::CreateSub(Expr, PCRelExpr, OutContext);
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}
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OutStreamer.EmitValue(Expr, Size);
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}
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}
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void ARMAsmPrinter::EmitJumpTable(const MachineInstr *MI) {
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unsigned Opcode = MI->getOpcode();
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int OpNum = 1;
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