#include "PPC.h"
#include "InstPrinter/PPCInstPrinter.h"
#include "MCTargetDesc/PPCMCExpr.h"
#include "MCTargetDesc/PPCPredicates.h"
#include "PPCMachineFunctionInfo.h"
#include "PPCSubtarget.h"
#include "PPCTargetMachine.h"
#include "PPCTargetStreamer.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/StackMaps.h"
#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Module.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstBuilder.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
using namespace llvm;
#define DEBUG_TYPE "asmprinter"
namespace {
class PPCAsmPrinter : public AsmPrinter {
protected:
MapVector<MCSymbol*, MCSymbol*> TOC;
const PPCSubtarget *Subtarget;
uint64_t TOCLabelID;
StackMaps SM;
public:
explicit PPCAsmPrinter(TargetMachine &TM,
std::unique_ptr<MCStreamer> Streamer)
: AsmPrinter(TM, std::move(Streamer)), TOCLabelID(0), SM(*this) {}
const char *getPassName() const override {
return "PowerPC Assembly Printer";
}
MCSymbol *lookUpOrCreateTOCEntry(MCSymbol *Sym);
void EmitInstruction(const MachineInstr *MI) override;
void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode,
raw_ostream &O) override;
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode,
raw_ostream &O) override;
void EmitEndOfAsmFile(Module &M) override;
void LowerSTACKMAP(MCStreamer &OutStreamer, StackMaps &SM,
const MachineInstr &MI);
void LowerPATCHPOINT(MCStreamer &OutStreamer, StackMaps &SM,
const MachineInstr &MI);
void EmitTlsCall(const MachineInstr *MI, MCSymbolRefExpr::VariantKind VK);
bool runOnMachineFunction(MachineFunction &MF) override {
Subtarget = &MF.getSubtarget<PPCSubtarget>();
return AsmPrinter::runOnMachineFunction(MF);
}
};
class PPCLinuxAsmPrinter : public PPCAsmPrinter {
public:
explicit PPCLinuxAsmPrinter(TargetMachine &TM,
std::unique_ptr<MCStreamer> Streamer)
: PPCAsmPrinter(TM, std::move(Streamer)) {}
const char *getPassName() const override {
return "Linux PPC Assembly Printer";
}
bool doFinalization(Module &M) override;
void EmitStartOfAsmFile(Module &M) override;
void EmitFunctionEntryLabel() override;
void EmitFunctionBodyStart() override;
void EmitFunctionBodyEnd() override;
};
class PPCDarwinAsmPrinter : public PPCAsmPrinter {
public:
explicit PPCDarwinAsmPrinter(TargetMachine &TM,
std::unique_ptr<MCStreamer> Streamer)
: PPCAsmPrinter(TM, std::move(Streamer)) {}
const char *getPassName() const override {
return "Darwin PPC Assembly Printer";
}
bool doFinalization(Module &M) override;
void EmitStartOfAsmFile(Module &M) override;
void EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs);
};
}
static const char *stripRegisterPrefix(const char *RegName) {
switch (RegName[0]) {
case 'r':
case 'f':
case 'q': case 'v':
if (RegName[1] == 's')
return RegName + 2;
return RegName + 1;
case 'c': if (RegName[1] == 'r') return RegName + 2;
}
return RegName;
}
void PPCAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
raw_ostream &O) {
const DataLayout *DL = TM.getDataLayout();
const MachineOperand &MO = MI->getOperand(OpNo);
switch (MO.getType()) {
case MachineOperand::MO_Register: {
const char *RegName = PPCInstPrinter::getRegisterName(MO.getReg());
if (!Subtarget->isDarwin())
RegName = stripRegisterPrefix(RegName);
O << RegName;
return;
}
case MachineOperand::MO_Immediate:
O << MO.getImm();
return;
case MachineOperand::MO_MachineBasicBlock:
O << *MO.getMBB()->getSymbol();
return;
case MachineOperand::MO_ConstantPoolIndex:
O << DL->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
<< '_' << MO.getIndex();
return;
case MachineOperand::MO_BlockAddress:
O << *GetBlockAddressSymbol(MO.getBlockAddress());
return;
case MachineOperand::MO_GlobalAddress: {
const GlobalValue *GV = MO.getGlobal();
MCSymbol *SymToPrint;
if (TM.getRelocationModel() != Reloc::Static &&
(GV->isDeclaration() || GV->isWeakForLinker())) {
if (!GV->hasHiddenVisibility()) {
SymToPrint = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
MachineModuleInfoImpl::StubValueTy &StubSym =
MMI->getObjFileInfo<MachineModuleInfoMachO>()
.getGVStubEntry(SymToPrint);
if (!StubSym.getPointer())
StubSym = MachineModuleInfoImpl::
StubValueTy(getSymbol(GV), !GV->hasInternalLinkage());
} else if (GV->isDeclaration() || GV->hasCommonLinkage() ||
GV->hasAvailableExternallyLinkage()) {
SymToPrint = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
MachineModuleInfoImpl::StubValueTy &StubSym =
MMI->getObjFileInfo<MachineModuleInfoMachO>().
getHiddenGVStubEntry(SymToPrint);
if (!StubSym.getPointer())
StubSym = MachineModuleInfoImpl::
StubValueTy(getSymbol(GV), !GV->hasInternalLinkage());
} else {
SymToPrint = getSymbol(GV);
}
} else {
SymToPrint = getSymbol(GV);
}
O << *SymToPrint;
printOffset(MO.getOffset(), O);
return;
}
default:
O << "<unknown operand type: " << (unsigned)MO.getType() << ">";
return;
}
}
bool PPCAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode, raw_ostream &O) {
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1] != 0) return true;
switch (ExtraCode[0]) {
default:
return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
case 'c': break; case 'L': if (!MI->getOperand(OpNo).isReg() ||
OpNo+1 == MI->getNumOperands() ||
!MI->getOperand(OpNo+1).isReg())
return true;
++OpNo; break;
case 'I':
if (MI->getOperand(OpNo).isImm())
O << "i";
return false;
}
}
printOperand(MI, OpNo, O);
return false;
}
bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode,
raw_ostream &O) {
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1] != 0) return true;
switch (ExtraCode[0]) {
default: return true; case 'y': {
const char *RegName = "r0";
if (!Subtarget->isDarwin())
RegName = stripRegisterPrefix(RegName);
O << RegName << ", ";
printOperand(MI, OpNo, O);
return false;
}
case 'U': case 'X': {
assert(MI->getOperand(OpNo).isReg());
return false;
}
}
}
assert(MI->getOperand(OpNo).isReg());
O << "0(";
printOperand(MI, OpNo, O);
O << ")";
return false;
}
MCSymbol *PPCAsmPrinter::lookUpOrCreateTOCEntry(MCSymbol *Sym) {
const DataLayout *DL = TM.getDataLayout();
MCSymbol *&TOCEntry = TOC[Sym];
while (!TOCEntry) {
if (OutContext.LookupSymbol(Twine(DL->getPrivateGlobalPrefix()) +
"C" + Twine(TOCLabelID++)) == nullptr) {
TOCEntry = GetTempSymbol("C", TOCLabelID);
}
}
return TOCEntry;
}
void PPCAsmPrinter::EmitEndOfAsmFile(Module &M) {
SM.serializeToStackMapSection();
}
void PPCAsmPrinter::LowerSTACKMAP(MCStreamer &OutStreamer, StackMaps &SM,
const MachineInstr &MI) {
unsigned NumNOPBytes = MI.getOperand(1).getImm();
SM.recordStackMap(MI);
assert(NumNOPBytes % 4 == 0 && "Invalid number of NOP bytes requested!");
const MachineBasicBlock &MBB = *MI.getParent();
MachineBasicBlock::const_iterator MII(MI);
++MII;
while (NumNOPBytes > 0) {
if (MII == MBB.end() || MII->isCall() ||
MII->getOpcode() == PPC::DBG_VALUE ||
MII->getOpcode() == TargetOpcode::PATCHPOINT ||
MII->getOpcode() == TargetOpcode::STACKMAP)
break;
++MII;
NumNOPBytes -= 4;
}
for (unsigned i = 0; i < NumNOPBytes; i += 4)
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::NOP));
}
void PPCAsmPrinter::LowerPATCHPOINT(MCStreamer &OutStreamer, StackMaps &SM,
const MachineInstr &MI) {
SM.recordPatchPoint(MI);
PatchPointOpers Opers(&MI);
int64_t CallTarget = Opers.getMetaOper(PatchPointOpers::TargetPos).getImm();
unsigned EncodedBytes = 0;
if (CallTarget) {
assert((CallTarget & 0xFFFFFFFFFFFF) == CallTarget &&
"High 16 bits of call target should be zero.");
unsigned ScratchReg = MI.getOperand(Opers.getNextScratchIdx()).getReg();
EncodedBytes = 6*4;
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LI8)
.addReg(ScratchReg)
.addImm((CallTarget >> 32) & 0xFFFF));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::RLDIC)
.addReg(ScratchReg)
.addReg(ScratchReg)
.addImm(32).addImm(16));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ORIS8)
.addReg(ScratchReg)
.addReg(ScratchReg)
.addImm((CallTarget >> 16) & 0xFFFF));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ORI8)
.addReg(ScratchReg)
.addReg(ScratchReg)
.addImm(CallTarget & 0xFFFF));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTCTR8).addReg(ScratchReg));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCTRL8));
}
unsigned NumBytes = Opers.getMetaOper(PatchPointOpers::NBytesPos).getImm();
assert(NumBytes >= EncodedBytes &&
"Patchpoint can't request size less than the length of a call.");
assert((NumBytes - EncodedBytes) % 4 == 0 &&
"Invalid number of NOP bytes requested!");
for (unsigned i = EncodedBytes; i < NumBytes; i += 4)
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::NOP));
}
void PPCAsmPrinter::EmitTlsCall(const MachineInstr *MI,
MCSymbolRefExpr::VariantKind VK) {
StringRef Name = "__tls_get_addr";
MCSymbol *TlsGetAddr = OutContext.GetOrCreateSymbol(Name);
MCSymbolRefExpr::VariantKind Kind = MCSymbolRefExpr::VK_None;
assert(MI->getOperand(0).isReg() &&
((Subtarget->isPPC64() && MI->getOperand(0).getReg() == PPC::X3) ||
(!Subtarget->isPPC64() && MI->getOperand(0).getReg() == PPC::R3)) &&
"GETtls[ld]ADDR[32] must define GPR3");
assert(MI->getOperand(1).isReg() &&
((Subtarget->isPPC64() && MI->getOperand(1).getReg() == PPC::X3) ||
(!Subtarget->isPPC64() && MI->getOperand(1).getReg() == PPC::R3)) &&
"GETtls[ld]ADDR[32] must read GPR3");
if (!Subtarget->isPPC64() && !Subtarget->isDarwin() &&
TM.getRelocationModel() == Reloc::PIC_)
Kind = MCSymbolRefExpr::VK_PLT;
const MCSymbolRefExpr *TlsRef =
MCSymbolRefExpr::Create(TlsGetAddr, Kind, OutContext);
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymVar = MCSymbolRefExpr::Create(MOSymbol, VK, OutContext);
EmitToStreamer(OutStreamer,
MCInstBuilder(Subtarget->isPPC64() ?
PPC::BL8_NOP_TLS : PPC::BL_TLS)
.addExpr(TlsRef)
.addExpr(SymVar));
}
void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
MCInst TmpInst;
bool isPPC64 = Subtarget->isPPC64();
bool isDarwin = Triple(TM.getTargetTriple()).isOSDarwin();
const Module *M = MF->getFunction()->getParent();
PICLevel::Level PL = M->getPICLevel();
switch (MI->getOpcode()) {
default: break;
case TargetOpcode::DBG_VALUE:
llvm_unreachable("Should be handled target independently");
case TargetOpcode::STACKMAP:
return LowerSTACKMAP(OutStreamer, SM, *MI);
case TargetOpcode::PATCHPOINT:
return LowerPATCHPOINT(OutStreamer, SM, *MI);
case PPC::MoveGOTtoLR: {
MCSymbol *GOTSymbol =
OutContext.GetOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
const MCExpr *OffsExpr =
MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(GOTSymbol,
MCSymbolRefExpr::VK_PPC_LOCAL,
OutContext),
MCConstantExpr::Create(4, OutContext),
OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL).addExpr(OffsExpr));
return;
}
case PPC::MovePCtoLR:
case PPC::MovePCtoLR8: {
MCSymbol *PICBase = MF->getPICBaseSymbol();
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL)
.addExpr(MCSymbolRefExpr::Create(PICBase, OutContext)));
OutStreamer.EmitLabel(PICBase);
return;
}
case PPC::UpdateGBR: {
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
MCSymbol *PICOffset =
MF->getInfo<PPCFunctionInfo>()->getPICOffsetSymbol();
TmpInst.setOpcode(PPC::LWZ);
const MCExpr *Exp =
MCSymbolRefExpr::Create(PICOffset, MCSymbolRefExpr::VK_None, OutContext);
const MCExpr *PB =
MCSymbolRefExpr::Create(MF->getPICBaseSymbol(),
MCSymbolRefExpr::VK_None,
OutContext);
const MCOperand TR = TmpInst.getOperand(1);
const MCOperand PICR = TmpInst.getOperand(0);
TmpInst.getOperand(1) =
MCOperand::CreateExpr(MCBinaryExpr::CreateSub(Exp, PB, OutContext));
TmpInst.getOperand(0) = TR;
TmpInst.getOperand(2) = PICR;
EmitToStreamer(OutStreamer, TmpInst);
TmpInst.setOpcode(PPC::ADD4);
TmpInst.getOperand(0) = PICR;
TmpInst.getOperand(1) = TR;
TmpInst.getOperand(2) = PICR;
EmitToStreamer(OutStreamer, TmpInst);
return;
}
case PPC::LWZtoc: {
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
TmpInst.setOpcode(PPC::LWZ);
const MachineOperand &MO = MI->getOperand(1);
assert(MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isBlockAddress());
MCSymbol *MOSymbol = nullptr;
if (MO.isGlobal())
MOSymbol = getSymbol(MO.getGlobal());
else if (MO.isCPI())
MOSymbol = GetCPISymbol(MO.getIndex());
else if (MO.isJTI())
MOSymbol = GetJTISymbol(MO.getIndex());
else if (MO.isBlockAddress())
MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
if (PL == PICLevel::Small) {
const MCExpr *Exp =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_GOT,
OutContext);
TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
} else {
MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
const MCExpr *Exp =
MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_None,
OutContext);
const MCExpr *PB =
MCSymbolRefExpr::Create(OutContext.GetOrCreateSymbol(Twine(".LTOC")),
OutContext);
Exp = MCBinaryExpr::CreateSub(Exp, PB, OutContext);
TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
}
EmitToStreamer(OutStreamer, TmpInst);
return;
}
case PPC::LDtocJTI:
case PPC::LDtocCPT:
case PPC::LDtocBA:
case PPC::LDtoc: {
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
TmpInst.setOpcode(PPC::LD);
const MachineOperand &MO = MI->getOperand(1);
assert(MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isBlockAddress());
MCSymbol *MOSymbol = nullptr;
if (MO.isGlobal())
MOSymbol = getSymbol(MO.getGlobal());
else if (MO.isCPI())
MOSymbol = GetCPISymbol(MO.getIndex());
else if (MO.isJTI())
MOSymbol = GetJTISymbol(MO.getIndex());
else if (MO.isBlockAddress())
MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
const MCExpr *Exp =
MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_PPC_TOC,
OutContext);
TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
EmitToStreamer(OutStreamer, TmpInst);
return;
}
case PPC::ADDIStocHA: {
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
TmpInst.setOpcode(PPC::ADDIS8);
const MachineOperand &MO = MI->getOperand(2);
assert((MO.isGlobal() || MO.isCPI() || MO.isJTI() ||
MO.isBlockAddress()) &&
"Invalid operand for ADDIStocHA!");
MCSymbol *MOSymbol = nullptr;
bool IsExternal = false;
bool IsNonLocalFunction = false;
bool IsCommon = false;
bool IsAvailExt = false;
if (MO.isGlobal()) {
const GlobalValue *GV = MO.getGlobal();
MOSymbol = getSymbol(GV);
IsExternal = GV->isDeclaration();
IsCommon = GV->hasCommonLinkage();
IsNonLocalFunction = GV->getType()->getElementType()->isFunctionTy() &&
(GV->isDeclaration() || GV->isWeakForLinker());
IsAvailExt = GV->hasAvailableExternallyLinkage();
} else if (MO.isCPI())
MOSymbol = GetCPISymbol(MO.getIndex());
else if (MO.isJTI())
MOSymbol = GetJTISymbol(MO.getIndex());
else if (MO.isBlockAddress())
MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
if (IsExternal || IsNonLocalFunction || IsCommon || IsAvailExt ||
MO.isJTI() || MO.isBlockAddress() ||
TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
const MCExpr *Exp =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_HA,
OutContext);
TmpInst.getOperand(2) = MCOperand::CreateExpr(Exp);
EmitToStreamer(OutStreamer, TmpInst);
return;
}
case PPC::LDtocL: {
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
TmpInst.setOpcode(PPC::LD);
const MachineOperand &MO = MI->getOperand(1);
assert((MO.isGlobal() || MO.isCPI() || MO.isJTI() ||
MO.isBlockAddress()) &&
"Invalid operand for LDtocL!");
MCSymbol *MOSymbol = nullptr;
if (MO.isJTI())
MOSymbol = lookUpOrCreateTOCEntry(GetJTISymbol(MO.getIndex()));
else if (MO.isBlockAddress()) {
MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
}
else if (MO.isCPI()) {
MOSymbol = GetCPISymbol(MO.getIndex());
if (TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
}
else if (MO.isGlobal()) {
const GlobalValue *GValue = MO.getGlobal();
MOSymbol = getSymbol(GValue);
if (GValue->getType()->getElementType()->isFunctionTy() ||
GValue->isDeclaration() || GValue->hasCommonLinkage() ||
GValue->hasAvailableExternallyLinkage() ||
TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
}
const MCExpr *Exp =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_LO,
OutContext);
TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
EmitToStreamer(OutStreamer, TmpInst);
return;
}
case PPC::ADDItocL: {
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
TmpInst.setOpcode(PPC::ADDI8);
const MachineOperand &MO = MI->getOperand(2);
assert((MO.isGlobal() || MO.isCPI()) && "Invalid operand for ADDItocL");
MCSymbol *MOSymbol = nullptr;
bool IsExternal = false;
bool IsNonLocalFunction = false;
if (MO.isGlobal()) {
const GlobalValue *GV = MO.getGlobal();
MOSymbol = getSymbol(GV);
IsExternal = GV->isDeclaration();
IsNonLocalFunction = GV->getType()->getElementType()->isFunctionTy() &&
(GV->isDeclaration() || GV->isWeakForLinker());
} else if (MO.isCPI())
MOSymbol = GetCPISymbol(MO.getIndex());
if (IsNonLocalFunction || IsExternal ||
TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
const MCExpr *Exp =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_LO,
OutContext);
TmpInst.getOperand(2) = MCOperand::CreateExpr(Exp);
EmitToStreamer(OutStreamer, TmpInst);
return;
}
case PPC::ADDISgotTprelHA: {
assert(Subtarget->isPPC64() && "Not supported for 32-bit PowerPC");
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymGotTprel =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA,
OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
.addReg(MI->getOperand(0).getReg())
.addReg(MI->getOperand(1).getReg())
.addExpr(SymGotTprel));
return;
}
case PPC::LDgotTprelL:
case PPC::LDgotTprelL32: {
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
TmpInst.setOpcode(isPPC64 ? PPC::LD : PPC::LWZ);
const MachineOperand &MO = MI->getOperand(1);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *Exp =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO,
OutContext);
TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
EmitToStreamer(OutStreamer, TmpInst);
return;
}
case PPC::PPC32PICGOT: {
MCSymbol *GOTSymbol = OutContext.GetOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
MCSymbol *GOTRef = OutContext.CreateTempSymbol();
MCSymbol *NextInstr = OutContext.CreateTempSymbol();
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL)
.addExpr(MCSymbolRefExpr::Create(NextInstr, OutContext)));
const MCExpr *OffsExpr =
MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(GOTSymbol, OutContext),
MCSymbolRefExpr::Create(GOTRef, OutContext),
OutContext);
OutStreamer.EmitLabel(GOTRef);
OutStreamer.EmitValue(OffsExpr, 4);
OutStreamer.EmitLabel(NextInstr);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MFLR)
.addReg(MI->getOperand(0).getReg()));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LWZ)
.addReg(MI->getOperand(1).getReg())
.addImm(0)
.addReg(MI->getOperand(0).getReg()));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADD4)
.addReg(MI->getOperand(0).getReg())
.addReg(MI->getOperand(1).getReg())
.addReg(MI->getOperand(0).getReg()));
return;
}
case PPC::PPC32GOT: {
MCSymbol *GOTSymbol = OutContext.GetOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
const MCExpr *SymGotTlsL =
MCSymbolRefExpr::Create(GOTSymbol, MCSymbolRefExpr::VK_PPC_LO,
OutContext);
const MCExpr *SymGotTlsHA =
MCSymbolRefExpr::Create(GOTSymbol, MCSymbolRefExpr::VK_PPC_HA,
OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LI)
.addReg(MI->getOperand(0).getReg())
.addExpr(SymGotTlsL));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS)
.addReg(MI->getOperand(0).getReg())
.addReg(MI->getOperand(0).getReg())
.addExpr(SymGotTlsHA));
return;
}
case PPC::ADDIStlsgdHA: {
assert(Subtarget->isPPC64() && "Not supported for 32-bit PowerPC");
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymGotTlsGD =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA,
OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
.addReg(MI->getOperand(0).getReg())
.addReg(MI->getOperand(1).getReg())
.addExpr(SymGotTlsGD));
return;
}
case PPC::ADDItlsgdL:
case PPC::ADDItlsgdL32: {
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymGotTlsGD = MCSymbolRefExpr::Create(
MOSymbol, Subtarget->isPPC64() ? MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO
: MCSymbolRefExpr::VK_PPC_GOT_TLSGD,
OutContext);
EmitToStreamer(OutStreamer,
MCInstBuilder(Subtarget->isPPC64() ? PPC::ADDI8 : PPC::ADDI)
.addReg(MI->getOperand(0).getReg())
.addReg(MI->getOperand(1).getReg())
.addExpr(SymGotTlsGD));
return;
}
case PPC::GETtlsADDR:
case PPC::GETtlsADDR32: {
EmitTlsCall(MI, MCSymbolRefExpr::VK_PPC_TLSGD);
return;
}
case PPC::ADDIStlsldHA: {
assert(Subtarget->isPPC64() && "Not supported for 32-bit PowerPC");
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymGotTlsLD =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA,
OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
.addReg(MI->getOperand(0).getReg())
.addReg(MI->getOperand(1).getReg())
.addExpr(SymGotTlsLD));
return;
}
case PPC::ADDItlsldL:
case PPC::ADDItlsldL32: {
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymGotTlsLD = MCSymbolRefExpr::Create(
MOSymbol, Subtarget->isPPC64() ? MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO
: MCSymbolRefExpr::VK_PPC_GOT_TLSLD,
OutContext);
EmitToStreamer(OutStreamer,
MCInstBuilder(Subtarget->isPPC64() ? PPC::ADDI8 : PPC::ADDI)
.addReg(MI->getOperand(0).getReg())
.addReg(MI->getOperand(1).getReg())
.addExpr(SymGotTlsLD));
return;
}
case PPC::GETtlsldADDR:
case PPC::GETtlsldADDR32: {
EmitTlsCall(MI, MCSymbolRefExpr::VK_PPC_TLSLD);
return;
}
case PPC::ADDISdtprelHA:
case PPC::ADDISdtprelHA32: {
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymDtprel =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL_HA,
OutContext);
EmitToStreamer(
OutStreamer,
MCInstBuilder(Subtarget->isPPC64() ? PPC::ADDIS8 : PPC::ADDIS)
.addReg(MI->getOperand(0).getReg())
.addReg(Subtarget->isPPC64() ? PPC::X3 : PPC::R3)
.addExpr(SymDtprel));
return;
}
case PPC::ADDIdtprelL:
case PPC::ADDIdtprelL32: {
const MachineOperand &MO = MI->getOperand(2);
const GlobalValue *GValue = MO.getGlobal();
MCSymbol *MOSymbol = getSymbol(GValue);
const MCExpr *SymDtprel =
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL_LO,
OutContext);
EmitToStreamer(OutStreamer,
MCInstBuilder(Subtarget->isPPC64() ? PPC::ADDI8 : PPC::ADDI)
.addReg(MI->getOperand(0).getReg())
.addReg(MI->getOperand(1).getReg())
.addExpr(SymDtprel));
return;
}
case PPC::MFOCRF:
case PPC::MFOCRF8:
if (!Subtarget->hasMFOCRF()) {
unsigned NewOpcode =
MI->getOpcode() == PPC::MFOCRF ? PPC::MFCR : PPC::MFCR8;
OutStreamer.AddComment(PPCInstPrinter::
getRegisterName(MI->getOperand(1).getReg()));
EmitToStreamer(OutStreamer, MCInstBuilder(NewOpcode)
.addReg(MI->getOperand(0).getReg()));
return;
}
break;
case PPC::MTOCRF:
case PPC::MTOCRF8:
if (!Subtarget->hasMFOCRF()) {
unsigned NewOpcode =
MI->getOpcode() == PPC::MTOCRF ? PPC::MTCRF : PPC::MTCRF8;
unsigned Mask = 0x80 >> OutContext.getRegisterInfo()
->getEncodingValue(MI->getOperand(0).getReg());
OutStreamer.AddComment(PPCInstPrinter::
getRegisterName(MI->getOperand(0).getReg()));
EmitToStreamer(OutStreamer, MCInstBuilder(NewOpcode)
.addImm(Mask)
.addReg(MI->getOperand(1).getReg()));
return;
}
break;
case PPC::LD:
case PPC::STD:
case PPC::LWA_32:
case PPC::LWA: {
if (!Subtarget->isDarwin()) {
unsigned OpNum = (MI->getOpcode() == PPC::STD) ? 2 : 1;
const MachineOperand &MO = MI->getOperand(OpNum);
if (MO.isGlobal() && MO.getGlobal()->getAlignment() < 4)
llvm_unreachable("Global must be word-aligned for LD, STD, LWA!");
}
break;
}
}
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
EmitToStreamer(OutStreamer, TmpInst);
}
void PPCLinuxAsmPrinter::EmitStartOfAsmFile(Module &M) {
if (static_cast<const PPCTargetMachine &>(TM).isELFv2ABI()) {
PPCTargetStreamer *TS =
static_cast<PPCTargetStreamer *>(OutStreamer.getTargetStreamer());
if (TS)
TS->emitAbiVersion(2);
}
if (static_cast<const PPCTargetMachine &>(TM).isPPC64() ||
TM.getRelocationModel() != Reloc::PIC_)
return AsmPrinter::EmitStartOfAsmFile(M);
if (M.getPICLevel() == PICLevel::Small)
return AsmPrinter::EmitStartOfAsmFile(M);
OutStreamer.SwitchSection(OutContext.getELFSection(
".got2", ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC));
MCSymbol *TOCSym = OutContext.GetOrCreateSymbol(Twine(".LTOC"));
MCSymbol *CurrentPos = OutContext.CreateTempSymbol();
OutStreamer.EmitLabel(CurrentPos);
const MCExpr *tocExpr =
MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(CurrentPos, OutContext),
MCConstantExpr::Create(0x8000, OutContext),
OutContext);
OutStreamer.EmitAssignment(TOCSym, tocExpr);
OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
}
void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
if (!Subtarget->isPPC64() &&
(TM.getRelocationModel() != Reloc::PIC_ ||
MF->getFunction()->getParent()->getPICLevel() == PICLevel::Small))
return AsmPrinter::EmitFunctionEntryLabel();
if (!Subtarget->isPPC64()) {
const PPCFunctionInfo *PPCFI = MF->getInfo<PPCFunctionInfo>();
if (PPCFI->usesPICBase()) {
MCSymbol *RelocSymbol = PPCFI->getPICOffsetSymbol();
MCSymbol *PICBase = MF->getPICBaseSymbol();
OutStreamer.EmitLabel(RelocSymbol);
const MCExpr *OffsExpr =
MCBinaryExpr::CreateSub(
MCSymbolRefExpr::Create(OutContext.GetOrCreateSymbol(Twine(".LTOC")),
OutContext),
MCSymbolRefExpr::Create(PICBase, OutContext),
OutContext);
OutStreamer.EmitValue(OffsExpr, 4);
OutStreamer.EmitLabel(CurrentFnSym);
return;
} else
return AsmPrinter::EmitFunctionEntryLabel();
}
if (Subtarget->isELFv2ABI())
return AsmPrinter::EmitFunctionEntryLabel();
MCSectionSubPair Current = OutStreamer.getCurrentSection();
const MCSectionELF *Section = OutStreamer.getContext().getELFSection(
".opd", ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC);
OutStreamer.SwitchSection(Section);
OutStreamer.EmitLabel(CurrentFnSym);
OutStreamer.EmitValueToAlignment(8);
MCSymbol *Symbol1 =
OutContext.GetOrCreateSymbol(".L." + Twine(CurrentFnSym->getName()));
OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol1, OutContext),
8 );
MCSymbol *Symbol2 = OutContext.GetOrCreateSymbol(StringRef(".TOC."));
OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol2,
MCSymbolRefExpr::VK_PPC_TOCBASE, OutContext),
8);
OutStreamer.EmitIntValue(0, 8 );
OutStreamer.SwitchSection(Current.first, Current.second);
MCSymbol *RealFnSym = OutContext.GetOrCreateSymbol(
".L." + Twine(CurrentFnSym->getName()));
OutStreamer.EmitLabel(RealFnSym);
CurrentFnSymForSize = RealFnSym;
}
bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
const DataLayout *TD = TM.getDataLayout();
bool isPPC64 = TD->getPointerSizeInBits() == 64;
PPCTargetStreamer &TS =
static_cast<PPCTargetStreamer &>(*OutStreamer.getTargetStreamer());
if (!TOC.empty()) {
const MCSectionELF *Section;
if (isPPC64)
Section = OutStreamer.getContext().getELFSection(
".toc", ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC);
else
Section = OutStreamer.getContext().getELFSection(
".got2", ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC);
OutStreamer.SwitchSection(Section);
for (MapVector<MCSymbol*, MCSymbol*>::iterator I = TOC.begin(),
E = TOC.end(); I != E; ++I) {
OutStreamer.EmitLabel(I->second);
MCSymbol *S = I->first;
if (isPPC64)
TS.emitTCEntry(*S);
else
OutStreamer.EmitSymbolValue(S, 4);
}
}
MachineModuleInfoELF &MMIELF =
MMI->getObjFileInfo<MachineModuleInfoELF>();
MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
if (!Stubs.empty()) {
OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
OutStreamer.EmitLabel(Stubs[i].first);
OutStreamer.EmitValue(MCSymbolRefExpr::Create(Stubs[i].second.getPointer(),
OutContext),
isPPC64 ? 8 : 4);
}
Stubs.clear();
OutStreamer.AddBlankLine();
}
return AsmPrinter::doFinalization(M);
}
void PPCLinuxAsmPrinter::EmitFunctionBodyStart() {
if (Subtarget->isELFv2ABI()
&& !MF->getRegInfo().use_empty(PPC::X2)) {
MCSymbol *GlobalEntryLabel = OutContext.CreateTempSymbol();
OutStreamer.EmitLabel(GlobalEntryLabel);
const MCSymbolRefExpr *GlobalEntryLabelExp =
MCSymbolRefExpr::Create(GlobalEntryLabel, OutContext);
MCSymbol *TOCSymbol = OutContext.GetOrCreateSymbol(StringRef(".TOC."));
const MCExpr *TOCDeltaExpr =
MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(TOCSymbol, OutContext),
GlobalEntryLabelExp, OutContext);
const MCExpr *TOCDeltaHi =
PPCMCExpr::CreateHa(TOCDeltaExpr, false, OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS)
.addReg(PPC::X2)
.addReg(PPC::X12)
.addExpr(TOCDeltaHi));
const MCExpr *TOCDeltaLo =
PPCMCExpr::CreateLo(TOCDeltaExpr, false, OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI)
.addReg(PPC::X2)
.addReg(PPC::X2)
.addExpr(TOCDeltaLo));
MCSymbol *LocalEntryLabel = OutContext.CreateTempSymbol();
OutStreamer.EmitLabel(LocalEntryLabel);
const MCSymbolRefExpr *LocalEntryLabelExp =
MCSymbolRefExpr::Create(LocalEntryLabel, OutContext);
const MCExpr *LocalOffsetExp =
MCBinaryExpr::CreateSub(LocalEntryLabelExp,
GlobalEntryLabelExp, OutContext);
PPCTargetStreamer *TS =
static_cast<PPCTargetStreamer *>(OutStreamer.getTargetStreamer());
if (TS)
TS->emitLocalEntry(CurrentFnSym, LocalOffsetExp);
}
}
void PPCLinuxAsmPrinter::EmitFunctionBodyEnd() {
if (Subtarget->isPPC64()) {
OutStreamer.EmitIntValue(0, 4);
OutStreamer.EmitIntValue(0, 8);
}
}
void PPCDarwinAsmPrinter::EmitStartOfAsmFile(Module &M) {
static const char *const CPUDirectives[] = {
"",
"ppc",
"ppc440",
"ppc601",
"ppc602",
"ppc603",
"ppc7400",
"ppc750",
"ppc970",
"ppcA2",
"ppce500mc",
"ppce5500",
"power3",
"power4",
"power5",
"power5x",
"power6",
"power6x",
"power7",
"ppc64",
"ppc64le"
};
unsigned Directive = PPC::DIR_NONE;
for (const Function &F : M) {
const PPCSubtarget &STI = TM.getSubtarget<PPCSubtarget>(F);
unsigned FDir = STI.getDarwinDirective();
Directive = Directive > FDir ? FDir : STI.getDarwinDirective();
if (STI.hasMFOCRF() && Directive < PPC::DIR_970)
Directive = PPC::DIR_970;
if (STI.hasAltivec() && Directive < PPC::DIR_7400)
Directive = PPC::DIR_7400;
if (STI.isPPC64() && Directive < PPC::DIR_64)
Directive = PPC::DIR_64;
}
assert(Directive <= PPC::DIR_64 && "Directive out of range.");
assert(Directive < array_lengthof(CPUDirectives) &&
"CPUDirectives[] might not be up-to-date!");
PPCTargetStreamer &TStreamer =
*static_cast<PPCTargetStreamer *>(OutStreamer.getTargetStreamer());
TStreamer.emitMachine(CPUDirectives[Directive]);
const TargetLoweringObjectFileMachO &TLOFMacho =
static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
OutStreamer.SwitchSection(TLOFMacho.getTextCoalSection());
if (TM.getRelocationModel() == Reloc::PIC_) {
OutStreamer.SwitchSection(
OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
MachO::S_SYMBOL_STUBS |
MachO::S_ATTR_PURE_INSTRUCTIONS,
32, SectionKind::getText()));
} else if (TM.getRelocationModel() == Reloc::DynamicNoPIC) {
OutStreamer.SwitchSection(
OutContext.getMachOSection("__TEXT","__symbol_stub1",
MachO::S_SYMBOL_STUBS |
MachO::S_ATTR_PURE_INSTRUCTIONS,
16, SectionKind::getText()));
}
OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
}
static MCSymbol *GetLazyPtr(MCSymbol *Sym, MCContext &Ctx) {
StringRef NoStub = Sym->getName().substr(0, Sym->getName().size()-5);
return Ctx.GetOrCreateSymbol(NoStub + "$lazy_ptr");
}
static MCSymbol *GetAnonSym(MCSymbol *Sym, MCContext &Ctx) {
return Ctx.GetOrCreateSymbol(Sym->getName() + "$tmp");
}
void PPCDarwinAsmPrinter::
EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs) {
bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
std::unique_ptr<MCSubtargetInfo> STI(TM.getTarget().createMCSubtargetInfo(
TM.getTargetTriple(), TM.getTargetCPU(), TM.getTargetFeatureString()));
auto EmitToStreamer = [&STI] (MCStreamer &S, const MCInst &Inst) {
S.EmitInstruction(Inst, *STI);
};
const TargetLoweringObjectFileMachO &TLOFMacho =
static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
const MCSection *LSPSection = TLOFMacho.getLazySymbolPointerSection();
if (TM.getRelocationModel() == Reloc::PIC_) {
const MCSection *StubSection =
OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
MachO::S_SYMBOL_STUBS |
MachO::S_ATTR_PURE_INSTRUCTIONS,
32, SectionKind::getText());
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
OutStreamer.SwitchSection(StubSection);
EmitAlignment(4);
MCSymbol *Stub = Stubs[i].first;
MCSymbol *RawSym = Stubs[i].second.getPointer();
MCSymbol *LazyPtr = GetLazyPtr(Stub, OutContext);
MCSymbol *AnonSymbol = GetAnonSym(Stub, OutContext);
OutStreamer.EmitLabel(Stub);
OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
const MCExpr *Anon = MCSymbolRefExpr::Create(AnonSymbol, OutContext);
const MCExpr *LazyPtrExpr = MCSymbolRefExpr::Create(LazyPtr, OutContext);
const MCExpr *Sub =
MCBinaryExpr::CreateSub(LazyPtrExpr, Anon, OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MFLR).addReg(PPC::R0));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCLalways).addExpr(Anon));
OutStreamer.EmitLabel(AnonSymbol);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MFLR).addReg(PPC::R11));
const MCExpr *SubHa16 = PPCMCExpr::CreateHa(Sub, true, OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS)
.addReg(PPC::R11)
.addReg(PPC::R11)
.addExpr(SubHa16));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTLR).addReg(PPC::R0));
const MCExpr *SubLo16 = PPCMCExpr::CreateLo(Sub, true, OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(isPPC64 ? PPC::LDU : PPC::LWZU)
.addReg(PPC::R12)
.addExpr(SubLo16).addExpr(SubLo16)
.addReg(PPC::R11));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTCTR).addReg(PPC::R12));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCTR));
OutStreamer.SwitchSection(LSPSection);
OutStreamer.EmitLabel(LazyPtr);
OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
MCSymbol *DyldStubBindingHelper =
OutContext.GetOrCreateSymbol(StringRef("dyld_stub_binding_helper"));
if (isPPC64) {
OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 8);
} else {
OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 4);
}
}
OutStreamer.AddBlankLine();
return;
}
const MCSection *StubSection =
OutContext.getMachOSection("__TEXT","__symbol_stub1",
MachO::S_SYMBOL_STUBS |
MachO::S_ATTR_PURE_INSTRUCTIONS,
16, SectionKind::getText());
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
MCSymbol *Stub = Stubs[i].first;
MCSymbol *RawSym = Stubs[i].second.getPointer();
MCSymbol *LazyPtr = GetLazyPtr(Stub, OutContext);
const MCExpr *LazyPtrExpr = MCSymbolRefExpr::Create(LazyPtr, OutContext);
OutStreamer.SwitchSection(StubSection);
EmitAlignment(4);
OutStreamer.EmitLabel(Stub);
OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
const MCExpr *LazyPtrHa16 =
PPCMCExpr::CreateHa(LazyPtrExpr, true, OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LIS)
.addReg(PPC::R11)
.addExpr(LazyPtrHa16));
const MCExpr *LazyPtrLo16 =
PPCMCExpr::CreateLo(LazyPtrExpr, true, OutContext);
EmitToStreamer(OutStreamer, MCInstBuilder(isPPC64 ? PPC::LDU : PPC::LWZU)
.addReg(PPC::R12)
.addExpr(LazyPtrLo16).addExpr(LazyPtrLo16)
.addReg(PPC::R11));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTCTR).addReg(PPC::R12));
EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCTR));
OutStreamer.SwitchSection(LSPSection);
OutStreamer.EmitLabel(LazyPtr);
OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
MCSymbol *DyldStubBindingHelper =
OutContext.GetOrCreateSymbol(StringRef("dyld_stub_binding_helper"));
if (isPPC64) {
OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 8);
} else {
OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 4);
}
}
OutStreamer.AddBlankLine();
}
bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
const TargetLoweringObjectFileMachO &TLOFMacho =
static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
MachineModuleInfoMachO &MMIMacho =
MMI->getObjFileInfo<MachineModuleInfoMachO>();
MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetFnStubList();
if (!Stubs.empty())
EmitFunctionStubs(Stubs);
if (MAI->doesSupportExceptionHandling() && MMI) {
const std::vector<const Function*> &Personalities = MMI->getPersonalities();
for (std::vector<const Function*>::const_iterator I = Personalities.begin(),
E = Personalities.end(); I != E; ++I) {
if (*I) {
MCSymbol *NLPSym = getSymbolWithGlobalValueBase(*I, "$non_lazy_ptr");
MachineModuleInfoImpl::StubValueTy &StubSym =
MMIMacho.getGVStubEntry(NLPSym);
StubSym = MachineModuleInfoImpl::StubValueTy(getSymbol(*I), true);
}
}
}
Stubs = MMIMacho.GetGVStubList();
if (!Stubs.empty()) {
OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
EmitAlignment(isPPC64 ? 3 : 2);
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
OutStreamer.EmitLabel(Stubs[i].first);
MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol);
if (MCSym.getInt())
OutStreamer.EmitIntValue(0, isPPC64 ? 8 : 4);
else
OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
OutContext),
isPPC64 ? 8 : 4);
}
Stubs.clear();
OutStreamer.AddBlankLine();
}
Stubs = MMIMacho.GetHiddenGVStubList();
if (!Stubs.empty()) {
OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
EmitAlignment(isPPC64 ? 3 : 2);
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
OutStreamer.EmitLabel(Stubs[i].first);
OutStreamer.EmitValue(MCSymbolRefExpr::
Create(Stubs[i].second.getPointer(),
OutContext),
isPPC64 ? 8 : 4);
}
Stubs.clear();
OutStreamer.AddBlankLine();
}
OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
return AsmPrinter::doFinalization(M);
}
static AsmPrinter *
createPPCAsmPrinterPass(TargetMachine &tm,
std::unique_ptr<MCStreamer> &&Streamer) {
if (Triple(tm.getTargetTriple()).isMacOSX())
return new PPCDarwinAsmPrinter(tm, std::move(Streamer));
return new PPCLinuxAsmPrinter(tm, std::move(Streamer));
}
extern "C" void LLVMInitializePowerPCAsmPrinter() {
TargetRegistry::RegisterAsmPrinter(ThePPC32Target, createPPCAsmPrinterPass);
TargetRegistry::RegisterAsmPrinter(ThePPC64Target, createPPCAsmPrinterPass);
TargetRegistry::RegisterAsmPrinter(ThePPC64LETarget, createPPCAsmPrinterPass);
}