#include "PPC.h"
#include "InstPrinter/PPCInstPrinter.h"
+#include "PPCMachineFunctionInfo.h"
#include "MCTargetDesc/PPCMCExpr.h"
#include "MCTargetDesc/PPCPredicates.h"
#include "PPCSubtarget.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/TargetLoweringObjectFileImpl.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DebugInfo.h"
}
bool doFinalization(Module &M) override;
+ void EmitStartOfAsmFile(Module &M) override;
void EmitFunctionEntryLabel() override;
+ void EmitFunctionBodyStart() override;
void EmitFunctionBodyEnd() override;
};
void PPCAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
raw_ostream &O) {
- const DataLayout *DL = TM.getDataLayout();
+ const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout();
const MachineOperand &MO = MI->getOperand(OpNo);
switch (MO.getType()) {
/// exists for it. If not, create one. Then return a symbol that references
/// the TOC entry.
MCSymbol *PPCAsmPrinter::lookUpOrCreateTOCEntry(MCSymbol *Sym) {
- const DataLayout *DL = TM.getDataLayout();
+ const DataLayout *DL = TM.getSubtargetImpl()->getDataLayout();
MCSymbol *&TOCEntry = TOC[Sym];
// To avoid name clash check if the name already exists.
OutStreamer.EmitLabel(PICBase);
return;
}
+ case PPC::GetGBRO: {
+ // Get the offset from the GOT Base Register to the GOT
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.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 MO = TmpInst.getOperand(1);
+ TmpInst.getOperand(1) = MCOperand::CreateExpr(MCBinaryExpr::CreateSub(Exp,
+ PB,
+ OutContext));
+ TmpInst.addOperand(MO);
+ EmitToStreamer(OutStreamer, TmpInst);
+ return;
+ }
+ case PPC::UpdateGBR: {
+ // Update the GOT Base Register to point to the GOT. It may be possible to
+ // merge this with the PPC::GetGBRO, doing it all in one step.
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+ TmpInst.setOpcode(PPC::ADD4);
+ TmpInst.addOperand(TmpInst.getOperand(0));
+ EmitToStreamer(OutStreamer, TmpInst);
+ return;
+ }
+ case PPC::LWZtoc: {
+ // Transform %X3 = LWZtoc <ga:@min1>, %X2
+ LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
+
+ // Change the opcode to LWZ, and the global address operand to be a
+ // reference to the GOT entry we will synthesize later.
+ TmpInst.setOpcode(PPC::LWZ);
+ const MachineOperand &MO = MI->getOperand(1);
+
+ // Map symbol -> label of TOC entry
+ assert(MO.isGlobal() || MO.isCPI() || MO.isJTI());
+ 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());
+
+ MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
+
+ const MCExpr *Exp =
+ MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_None,
+ OutContext);
+ const MCExpr *PB =
+ MCSymbolRefExpr::Create(OutContext.GetOrCreateSymbol(Twine(".L.TOC.")),
+ 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::LDtoc: {
// Transform %Xd = ADDIStocHA %X2, <ga:@sym>
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
- // Change the opcode to ADDIS8. If the global address is external,
- // has common linkage, is a function address, or is a jump table
+ // Change the opcode to ADDIS8. If the global address is external, has
+ // common linkage, is a non-local function address, or is a jump table
// address, then generate a TOC entry and reference that. Otherwise
// reference the symbol directly.
TmpInst.setOpcode(PPC::ADDIS8);
"Invalid operand for ADDIStocHA!");
MCSymbol *MOSymbol = nullptr;
bool IsExternal = false;
- bool IsFunction = false;
+ bool IsNonLocalFunction = false;
bool IsCommon = false;
bool IsAvailExt = false;
if (MO.isGlobal()) {
- const GlobalValue *GValue = MO.getGlobal();
- const GlobalAlias *GAlias = dyn_cast<GlobalAlias>(GValue);
- const GlobalValue *RealGValue = GAlias ? GAlias->getAliasee() : GValue;
- MOSymbol = getSymbol(RealGValue);
- const GlobalVariable *GVar = dyn_cast<GlobalVariable>(RealGValue);
- IsExternal = GVar && !GVar->hasInitializer();
- IsCommon = GVar && RealGValue->hasCommonLinkage();
- IsFunction = !GVar;
- IsAvailExt = GVar && RealGValue->hasAvailableExternallyLinkage();
+ 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());
- if (IsExternal || IsFunction || IsCommon || IsAvailExt || MO.isJTI() ||
- TM.getCodeModel() == CodeModel::Large)
+ if (IsExternal || IsNonLocalFunction || IsCommon || IsAvailExt ||
+ MO.isJTI() || TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
const MCExpr *Exp =
}
else if (MO.isGlobal()) {
const GlobalValue *GValue = MO.getGlobal();
- const GlobalAlias *GAlias = dyn_cast<GlobalAlias>(GValue);
- const GlobalValue *RealGValue = GAlias ? GAlias->getAliasee() : GValue;
- MOSymbol = getSymbol(RealGValue);
- const GlobalVariable *GVar = dyn_cast<GlobalVariable>(RealGValue);
-
- if (!GVar || !GVar->hasInitializer() || RealGValue->hasCommonLinkage() ||
- RealGValue->hasAvailableExternallyLinkage() ||
+ MOSymbol = getSymbol(GValue);
+ if (GValue->getType()->getElementType()->isFunctionTy() ||
+ GValue->isDeclaration() || GValue->hasCommonLinkage() ||
+ GValue->hasAvailableExternallyLinkage() ||
TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
}
assert((MO.isGlobal() || MO.isCPI()) && "Invalid operand for ADDItocL");
MCSymbol *MOSymbol = nullptr;
bool IsExternal = false;
- bool IsFunction = false;
+ bool IsNonLocalFunction = false;
if (MO.isGlobal()) {
- const GlobalValue *GValue = MO.getGlobal();
- const GlobalAlias *GAlias = dyn_cast<GlobalAlias>(GValue);
- const GlobalValue *RealGValue = GAlias ? GAlias->getAliasee() : GValue;
- MOSymbol = getSymbol(RealGValue);
- const GlobalVariable *GVar = dyn_cast<GlobalVariable>(RealGValue);
- IsExternal = GVar && !GVar->hasInitializer();
- IsFunction = !GVar;
+ 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 (IsFunction || IsExternal || TM.getCodeModel() == CodeModel::Large)
+ if (IsNonLocalFunction || IsExternal ||
+ TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
const MCExpr *Exp =
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)
+ // FIXME: We would like an efficient form for this, so we don't have to do
+ // a lot of extra uniquing.
+ .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 =
.addExpr(SymGotTlsGD));
return;
}
- case PPC::ADDItlsgdL: {
+ case PPC::ADDItlsgdL:
// Transform: %Xd = ADDItlsgdL %Xs, <ga:@sym>
// Into: %Xd = ADDI8 %Xs, sym@got@tlsgd@l
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
+ case PPC::ADDItlsgdL32: {
+ // Transform: %Rd = ADDItlsgdL32 %Rs, <ga:@sym>
+ // Into: %Rd = ADDI %Rs, sym@got@tlsgd
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_LO,
+ MCSymbolRefExpr::Create(MOSymbol, Subtarget.isPPC64() ?
+ MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO :
+ MCSymbolRefExpr::VK_PPC_GOT_TLSGD,
OutContext);
- EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI8)
- .addReg(MI->getOperand(0).getReg())
- .addReg(MI->getOperand(1).getReg())
- .addExpr(SymGotTlsGD));
+ 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::GETtlsADDR:
// Transform: %X3 = GETtlsADDR %X3, <ga:@sym>
// Into: BL8_NOP_TLS __tls_get_addr(sym@tlsgd)
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
+ case PPC::GETtlsADDR32: {
+ // Transform: %R3 = GETtlsADDR32 %R3, <ga:@sym>
+ // Into: BL_TLS __tls_get_addr(sym@tlsgd)@PLT
StringRef Name = "__tls_get_addr";
MCSymbol *TlsGetAddr = OutContext.GetOrCreateSymbol(Name);
+ MCSymbolRefExpr::VariantKind Kind = MCSymbolRefExpr::VK_None;
+
+ if (!Subtarget.isPPC64() && !Subtarget.isDarwin() &&
+ TM.getRelocationModel() == Reloc::PIC_)
+ Kind = MCSymbolRefExpr::VK_PLT;
const MCSymbolRefExpr *TlsRef =
- MCSymbolRefExpr::Create(TlsGetAddr, MCSymbolRefExpr::VK_None, OutContext);
+ 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, MCSymbolRefExpr::VK_PPC_TLSGD,
OutContext);
- EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL8_NOP_TLS)
- .addExpr(TlsRef)
- .addExpr(SymVar));
+ EmitToStreamer(OutStreamer,
+ MCInstBuilder(Subtarget.isPPC64() ?
+ PPC::BL8_NOP_TLS : PPC::BL_TLS)
+ .addExpr(TlsRef)
+ .addExpr(SymVar));
return;
}
case PPC::ADDIStlsldHA: {
.addExpr(SymGotTlsLD));
return;
}
- case PPC::ADDItlsldL: {
+ case PPC::ADDItlsldL:
// Transform: %Xd = ADDItlsldL %Xs, <ga:@sym>
// Into: %Xd = ADDI8 %Xs, sym@got@tlsld@l
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
+ case PPC::ADDItlsldL32: {
+ // Transform: %Rd = ADDItlsldL32 %Rs, <ga:@sym>
+ // Into: %Rd = ADDI %Rs, sym@got@tlsld
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_LO,
+ MCSymbolRefExpr::Create(MOSymbol, Subtarget.isPPC64() ?
+ MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO :
+ MCSymbolRefExpr::VK_PPC_GOT_TLSLD,
OutContext);
- EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI8)
- .addReg(MI->getOperand(0).getReg())
- .addReg(MI->getOperand(1).getReg())
- .addExpr(SymGotTlsLD));
+ 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::GETtlsldADDR:
// Transform: %X3 = GETtlsldADDR %X3, <ga:@sym>
// Into: BL8_NOP_TLS __tls_get_addr(sym@tlsld)
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
+ case PPC::GETtlsldADDR32: {
+ // Transform: %R3 = GETtlsldADDR32 %R3, <ga:@sym>
+ // Into: BL_TLS __tls_get_addr(sym@tlsld)@PLT
StringRef Name = "__tls_get_addr";
MCSymbol *TlsGetAddr = OutContext.GetOrCreateSymbol(Name);
+ MCSymbolRefExpr::VariantKind Kind = MCSymbolRefExpr::VK_None;
+
+ if (!Subtarget.isPPC64() && !Subtarget.isDarwin() &&
+ TM.getRelocationModel() == Reloc::PIC_)
+ Kind = MCSymbolRefExpr::VK_PLT;
+
const MCSymbolRefExpr *TlsRef =
- MCSymbolRefExpr::Create(TlsGetAddr, MCSymbolRefExpr::VK_None, OutContext);
+ 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, MCSymbolRefExpr::VK_PPC_TLSLD,
OutContext);
- EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL8_NOP_TLS)
- .addExpr(TlsRef)
- .addExpr(SymVar));
+ EmitToStreamer(OutStreamer,
+ MCInstBuilder(Subtarget.isPPC64() ?
+ PPC::BL8_NOP_TLS : PPC::BL_TLS)
+ .addExpr(TlsRef)
+ .addExpr(SymVar));
return;
}
- case PPC::ADDISdtprelHA: {
+ case PPC::ADDISdtprelHA:
// Transform: %Xd = ADDISdtprelHA %X3, <ga:@sym>
// Into: %Xd = ADDIS8 %X3, sym@dtprel@ha
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
+ case PPC::ADDISdtprelHA32: {
+ // Transform: %Rd = ADDISdtprelHA32 %R3, <ga:@sym>
+ // Into: %Rd = ADDIS %R3, sym@dtprel@ha
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(PPC::ADDIS8)
- .addReg(MI->getOperand(0).getReg())
- .addReg(PPC::X3)
- .addExpr(SymDtprel));
+ 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::ADDIdtprelL:
// Transform: %Xd = ADDIdtprelL %Xs, <ga:@sym>
// Into: %Xd = ADDI8 %Xs, sym@dtprel@l
- assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
+ case PPC::ADDIdtprelL32: {
+ // Transform: %Rd = ADDIdtprelL32 %Rs, <ga:@sym>
+ // Into: %Rd = ADDI %Rs, sym@dtprel@l
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(PPC::ADDI8)
- .addReg(MI->getOperand(0).getReg())
- .addReg(MI->getOperand(1).getReg())
- .addExpr(SymDtprel));
+ 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:
EmitToStreamer(OutStreamer, TmpInst);
}
+void PPCLinuxAsmPrinter::EmitStartOfAsmFile(Module &M) {
+ if (Subtarget.isELFv2ABI()) {
+ PPCTargetStreamer *TS =
+ static_cast<PPCTargetStreamer *>(OutStreamer.getTargetStreamer());
+
+ if (TS)
+ TS->emitAbiVersion(2);
+ }
+
+ if (Subtarget.isPPC64() || TM.getRelocationModel() != Reloc::PIC_)
+ return AsmPrinter::EmitStartOfAsmFile(M);
+
+ // FIXME: The use of .got2 assumes large GOT model (-fPIC), which is not
+ // optimal for some cases. We should consider supporting small model (-fpic)
+ // as well in the future.
+ assert(TM.getCodeModel() != CodeModel::Small &&
+ "Small code model PIC is currently unsupported.");
+ OutStreamer.SwitchSection(OutContext.getELFSection(".got2",
+ ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
+ SectionKind::getReadOnly()));
+
+ MCSymbol *TOCSym = OutContext.GetOrCreateSymbol(Twine(".L.TOC."));
+ MCSymbol *CurrentPos = OutContext.CreateTempSymbol();
+
+ OutStreamer.EmitLabel(CurrentPos);
+
+ // The GOT pointer points to the middle of the GOT, in order to reference the
+ // entire 64kB range. 0x8000 is the midpoint.
+ 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()) // linux/ppc32 - Normal entry label.
+ // linux/ppc32 - Normal entry label.
+ if (!Subtarget.isPPC64() && TM.getRelocationModel() != Reloc::PIC_)
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(".L.TOC.")),
+ OutContext),
+ MCSymbolRefExpr::Create(PICBase, OutContext),
+ OutContext);
+ OutStreamer.EmitValue(OffsExpr, 4);
+ OutStreamer.EmitLabel(CurrentFnSym);
+ return;
+ } else
+ return AsmPrinter::EmitFunctionEntryLabel();
+ }
+
+ // ELFv2 ABI - Normal entry label.
+ if (Subtarget.isELFv2ABI())
+ return AsmPrinter::EmitFunctionEntryLabel();
+
// Emit an official procedure descriptor.
MCSectionSubPair Current = OutStreamer.getCurrentSection();
const MCSectionELF *Section = OutStreamer.getContext().getELFSection(".opd",
bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
- const DataLayout *TD = TM.getDataLayout();
+ const DataLayout *TD = TM.getSubtargetImpl()->getDataLayout();
bool isPPC64 = TD->getPointerSizeInBits() == 64;
PPCTargetStreamer &TS =
static_cast<PPCTargetStreamer &>(*OutStreamer.getTargetStreamer());
- if (isPPC64 && !TOC.empty()) {
- const MCSectionELF *Section = OutStreamer.getContext().getELFSection(".toc",
+ if (!TOC.empty()) {
+ const MCSectionELF *Section;
+
+ if (isPPC64)
+ Section = OutStreamer.getContext().getELFSection(".toc",
+ ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
+ SectionKind::getReadOnly());
+ else
+ Section = OutStreamer.getContext().getELFSection(".got2",
ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
SectionKind::getReadOnly());
OutStreamer.SwitchSection(Section);
E = TOC.end(); I != E; ++I) {
OutStreamer.EmitLabel(I->second);
MCSymbol *S = OutContext.GetOrCreateSymbol(I->first->getName());
- TS.emitTCEntry(*S);
+ if (isPPC64)
+ TS.emitTCEntry(*S);
+ else
+ OutStreamer.EmitSymbolValue(S, 4);
}
}
return AsmPrinter::doFinalization(M);
}
+/// EmitFunctionBodyStart - Emit a global entry point prefix for ELFv2.
+void PPCLinuxAsmPrinter::EmitFunctionBodyStart() {
+ // In the ELFv2 ABI, in functions that use the TOC register, we need to
+ // provide two entry points. The ABI guarantees that when calling the
+ // local entry point, r2 is set up by the caller to contain the TOC base
+ // for this function, and when calling the global entry point, r12 is set
+ // up by the caller to hold the address of the global entry point. We
+ // thus emit a prefix sequence along the following lines:
+ //
+ // func:
+ // # global entry point
+ // addis r2,r12,(.TOC.-func)@ha
+ // addi r2,r2,(.TOC.-func)@l
+ // .localentry func, .-func
+ // # local entry point, followed by function body
+ //
+ // This ensures we have r2 set up correctly while executing the function
+ // body, no matter which entry point is called.
+ if (Subtarget.isELFv2ABI()
+ // Only do all that if the function uses r2 in the first place.
+ && !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);
+ }
+}
+
/// EmitFunctionBodyEnd - Print the traceback table before the .size
/// directive.
///
void PPCDarwinAsmPrinter::
EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs) {
- bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
+ bool isPPC64 =
+ TM.getSubtargetImpl()->getDataLayout()->getPointerSizeInBits() == 64;
bool isDarwin = Subtarget.isDarwin();
const TargetLoweringObjectFileMachO &TLOFMacho =
bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
- bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
+ bool isPPC64 =
+ TM.getSubtargetImpl()->getDataLayout()->getPointerSizeInBits() == 64;
// Darwin/PPC always uses mach-o.
const TargetLoweringObjectFileMachO &TLOFMacho =
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