mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-27 15:29:51 +00:00
Large code model is identical to medium code model except that the addis/addi sequence for "local" accesses is never used. All accesses use the addis/ld sequence. The coding changes are straightforward; most of the patch is taken up with creating variants of the medium model tests for large model. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175767 91177308-0d34-0410-b5e6-96231b3b80d8
1128 lines
42 KiB
C++
1128 lines
42 KiB
C++
//===-- PPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly ------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains a printer that converts from our internal representation
|
|
// of machine-dependent LLVM code to PowerPC assembly language. This printer is
|
|
// the output mechanism used by `llc'.
|
|
//
|
|
// Documentation at http://developer.apple.com/documentation/DeveloperTools/
|
|
// Reference/Assembler/ASMIntroduction/chapter_1_section_1.html
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#define DEBUG_TYPE "asmprinter"
|
|
#include "PPC.h"
|
|
#include "InstPrinter/PPCInstPrinter.h"
|
|
#include "MCTargetDesc/PPCPredicates.h"
|
|
#include "PPCSubtarget.h"
|
|
#include "PPCTargetMachine.h"
|
|
#include "llvm/ADT/MapVector.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/Assembly/Writer.h"
|
|
#include "llvm/CodeGen/AsmPrinter.h"
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
|
#include "llvm/CodeGen/MachineInstr.h"
|
|
#include "llvm/CodeGen/MachineInstrBuilder.h"
|
|
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
|
|
#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
|
|
#include "llvm/DebugInfo.h"
|
|
#include "llvm/IR/Constants.h"
|
|
#include "llvm/IR/DerivedTypes.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/Mangler.h"
|
|
#include "llvm/Target/TargetInstrInfo.h"
|
|
#include "llvm/Target/TargetOptions.h"
|
|
#include "llvm/Target/TargetRegisterInfo.h"
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
class PPCAsmPrinter : public AsmPrinter {
|
|
protected:
|
|
MapVector<MCSymbol*, MCSymbol*> TOC;
|
|
const PPCSubtarget &Subtarget;
|
|
uint64_t TOCLabelID;
|
|
public:
|
|
explicit PPCAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
|
|
: AsmPrinter(TM, Streamer),
|
|
Subtarget(TM.getSubtarget<PPCSubtarget>()), TOCLabelID(0) {}
|
|
|
|
virtual const char *getPassName() const {
|
|
return "PowerPC Assembly Printer";
|
|
}
|
|
|
|
MCSymbol *lookUpOrCreateTOCEntry(MCSymbol *Sym);
|
|
|
|
virtual void EmitInstruction(const MachineInstr *MI);
|
|
|
|
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);
|
|
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
|
|
unsigned AsmVariant, const char *ExtraCode,
|
|
raw_ostream &O);
|
|
|
|
MachineLocation getDebugValueLocation(const MachineInstr *MI) const {
|
|
MachineLocation Location;
|
|
assert(MI->getNumOperands() == 4 && "Invalid no. of machine operands!");
|
|
// Frame address. Currently handles register +- offset only.
|
|
if (MI->getOperand(0).isReg() && MI->getOperand(2).isImm())
|
|
Location.set(MI->getOperand(0).getReg(), MI->getOperand(2).getImm());
|
|
else {
|
|
DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n");
|
|
}
|
|
return Location;
|
|
}
|
|
};
|
|
|
|
/// PPCLinuxAsmPrinter - PowerPC assembly printer, customized for Linux
|
|
class PPCLinuxAsmPrinter : public PPCAsmPrinter {
|
|
public:
|
|
explicit PPCLinuxAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
|
|
: PPCAsmPrinter(TM, Streamer) {}
|
|
|
|
virtual const char *getPassName() const {
|
|
return "Linux PPC Assembly Printer";
|
|
}
|
|
|
|
bool doFinalization(Module &M);
|
|
|
|
virtual void EmitFunctionEntryLabel();
|
|
|
|
void EmitFunctionBodyEnd();
|
|
};
|
|
|
|
/// PPCDarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac
|
|
/// OS X
|
|
class PPCDarwinAsmPrinter : public PPCAsmPrinter {
|
|
public:
|
|
explicit PPCDarwinAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
|
|
: PPCAsmPrinter(TM, Streamer) {}
|
|
|
|
virtual const char *getPassName() const {
|
|
return "Darwin PPC Assembly Printer";
|
|
}
|
|
|
|
bool doFinalization(Module &M);
|
|
void EmitStartOfAsmFile(Module &M);
|
|
|
|
void EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs);
|
|
};
|
|
} // end of anonymous namespace
|
|
|
|
/// stripRegisterPrefix - This method strips the character prefix from a
|
|
/// register name so that only the number is left. Used by for linux asm.
|
|
static const char *stripRegisterPrefix(const char *RegName) {
|
|
switch (RegName[0]) {
|
|
case 'r':
|
|
case 'f':
|
|
case 'v': 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 MachineOperand &MO = MI->getOperand(OpNo);
|
|
|
|
switch (MO.getType()) {
|
|
case MachineOperand::MO_Register: {
|
|
const char *RegName = PPCInstPrinter::getRegisterName(MO.getReg());
|
|
// Linux assembler (Others?) does not take register mnemonics.
|
|
// FIXME - What about special registers used in mfspr/mtspr?
|
|
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_JumpTableIndex:
|
|
O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
|
|
<< '_' << MO.getIndex();
|
|
// FIXME: PIC relocation model
|
|
return;
|
|
case MachineOperand::MO_ConstantPoolIndex:
|
|
O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
|
|
<< '_' << MO.getIndex();
|
|
return;
|
|
case MachineOperand::MO_BlockAddress:
|
|
O << *GetBlockAddressSymbol(MO.getBlockAddress());
|
|
return;
|
|
case MachineOperand::MO_ExternalSymbol: {
|
|
// Computing the address of an external symbol, not calling it.
|
|
if (TM.getRelocationModel() == Reloc::Static) {
|
|
O << *GetExternalSymbolSymbol(MO.getSymbolName());
|
|
return;
|
|
}
|
|
|
|
MCSymbol *NLPSym =
|
|
OutContext.GetOrCreateSymbol(StringRef(MAI->getGlobalPrefix())+
|
|
MO.getSymbolName()+"$non_lazy_ptr");
|
|
MachineModuleInfoImpl::StubValueTy &StubSym =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(NLPSym);
|
|
if (StubSym.getPointer() == 0)
|
|
StubSym = MachineModuleInfoImpl::
|
|
StubValueTy(GetExternalSymbolSymbol(MO.getSymbolName()), true);
|
|
|
|
O << *NLPSym;
|
|
return;
|
|
}
|
|
case MachineOperand::MO_GlobalAddress: {
|
|
// Computing the address of a global symbol, not calling it.
|
|
const GlobalValue *GV = MO.getGlobal();
|
|
MCSymbol *SymToPrint;
|
|
|
|
// External or weakly linked global variables need non-lazily-resolved stubs
|
|
if (TM.getRelocationModel() != Reloc::Static &&
|
|
(GV->isDeclaration() || GV->isWeakForLinker())) {
|
|
if (!GV->hasHiddenVisibility()) {
|
|
SymToPrint = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
|
|
MachineModuleInfoImpl::StubValueTy &StubSym =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>()
|
|
.getGVStubEntry(SymToPrint);
|
|
if (StubSym.getPointer() == 0)
|
|
StubSym = MachineModuleInfoImpl::
|
|
StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
|
|
} else if (GV->isDeclaration() || GV->hasCommonLinkage() ||
|
|
GV->hasAvailableExternallyLinkage()) {
|
|
SymToPrint = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
|
|
|
|
MachineModuleInfoImpl::StubValueTy &StubSym =
|
|
MMI->getObjFileInfo<MachineModuleInfoMachO>().
|
|
getHiddenGVStubEntry(SymToPrint);
|
|
if (StubSym.getPointer() == 0)
|
|
StubSym = MachineModuleInfoImpl::
|
|
StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
|
|
} else {
|
|
SymToPrint = Mang->getSymbol(GV);
|
|
}
|
|
} else {
|
|
SymToPrint = Mang->getSymbol(GV);
|
|
}
|
|
|
|
O << *SymToPrint;
|
|
|
|
printOffset(MO.getOffset(), O);
|
|
return;
|
|
}
|
|
|
|
default:
|
|
O << "<unknown operand type: " << MO.getType() << ">";
|
|
return;
|
|
}
|
|
}
|
|
|
|
/// PrintAsmOperand - Print out an operand for an inline asm expression.
|
|
///
|
|
bool PPCAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
|
|
unsigned AsmVariant,
|
|
const char *ExtraCode, raw_ostream &O) {
|
|
// Does this asm operand have a single letter operand modifier?
|
|
if (ExtraCode && ExtraCode[0]) {
|
|
if (ExtraCode[1] != 0) return true; // Unknown modifier.
|
|
|
|
switch (ExtraCode[0]) {
|
|
default:
|
|
// See if this is a generic print operand
|
|
return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
|
|
case 'c': // Don't print "$" before a global var name or constant.
|
|
break; // PPC never has a prefix.
|
|
case 'L': // Write second word of DImode reference.
|
|
// Verify that this operand has two consecutive registers.
|
|
if (!MI->getOperand(OpNo).isReg() ||
|
|
OpNo+1 == MI->getNumOperands() ||
|
|
!MI->getOperand(OpNo+1).isReg())
|
|
return true;
|
|
++OpNo; // Return the high-part.
|
|
break;
|
|
case 'I':
|
|
// Write 'i' if an integer constant, otherwise nothing. Used to print
|
|
// addi vs add, etc.
|
|
if (MI->getOperand(OpNo).isImm())
|
|
O << "i";
|
|
return false;
|
|
}
|
|
}
|
|
|
|
printOperand(MI, OpNo, O);
|
|
return false;
|
|
}
|
|
|
|
// At the moment, all inline asm memory operands are a single register.
|
|
// In any case, the output of this routine should always be just one
|
|
// assembler operand.
|
|
|
|
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; // Unknown modifier.
|
|
|
|
switch (ExtraCode[0]) {
|
|
default: return true; // Unknown modifier.
|
|
case 'y': // A memory reference for an X-form instruction
|
|
{
|
|
const char *RegName = "r0";
|
|
if (!Subtarget.isDarwin()) RegName = stripRegisterPrefix(RegName);
|
|
O << RegName << ", ";
|
|
printOperand(MI, OpNo, O);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
assert(MI->getOperand(OpNo).isReg());
|
|
O << "0(";
|
|
printOperand(MI, OpNo, O);
|
|
O << ")";
|
|
return false;
|
|
}
|
|
|
|
|
|
/// lookUpOrCreateTOCEntry -- Given a symbol, look up whether a TOC entry
|
|
/// exists for it. If not, create one. Then return a symbol that references
|
|
/// the TOC entry.
|
|
MCSymbol *PPCAsmPrinter::lookUpOrCreateTOCEntry(MCSymbol *Sym) {
|
|
|
|
MCSymbol *&TOCEntry = TOC[Sym];
|
|
|
|
// To avoid name clash check if the name already exists.
|
|
while (TOCEntry == 0) {
|
|
if (OutContext.LookupSymbol(Twine(MAI->getPrivateGlobalPrefix()) +
|
|
"C" + Twine(TOCLabelID++)) == 0) {
|
|
TOCEntry = GetTempSymbol("C", TOCLabelID);
|
|
}
|
|
}
|
|
|
|
return TOCEntry;
|
|
}
|
|
|
|
|
|
/// EmitInstruction -- Print out a single PowerPC MI in Darwin syntax to
|
|
/// the current output stream.
|
|
///
|
|
void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
|
|
MCInst TmpInst;
|
|
|
|
// Lower multi-instruction pseudo operations.
|
|
switch (MI->getOpcode()) {
|
|
default: break;
|
|
case TargetOpcode::DBG_VALUE: {
|
|
if (!isVerbose() || !OutStreamer.hasRawTextSupport()) return;
|
|
|
|
SmallString<32> Str;
|
|
raw_svector_ostream O(Str);
|
|
unsigned NOps = MI->getNumOperands();
|
|
assert(NOps==4);
|
|
O << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
|
|
// cast away const; DIetc do not take const operands for some reason.
|
|
DIVariable V(const_cast<MDNode *>(MI->getOperand(NOps-1).getMetadata()));
|
|
O << V.getName();
|
|
O << " <- ";
|
|
// Frame address. Currently handles register +- offset only.
|
|
assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm());
|
|
O << '['; printOperand(MI, 0, O); O << '+'; printOperand(MI, 1, O);
|
|
O << ']';
|
|
O << "+";
|
|
printOperand(MI, NOps-2, O);
|
|
OutStreamer.EmitRawText(O.str());
|
|
return;
|
|
}
|
|
|
|
case PPC::MovePCtoLR:
|
|
case PPC::MovePCtoLR8: {
|
|
// Transform %LR = MovePCtoLR
|
|
// Into this, where the label is the PIC base:
|
|
// bl L1$pb
|
|
// L1$pb:
|
|
MCSymbol *PICBase = MF->getPICBaseSymbol();
|
|
|
|
// Emit the 'bl'.
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::BL_Darwin) // Darwin vs SVR4 doesn't matter here.
|
|
// FIXME: We would like an efficient form for this, so we don't have to do
|
|
// a lot of extra uniquing.
|
|
.addExpr(MCSymbolRefExpr::Create(PICBase, OutContext)));
|
|
|
|
// Emit the label.
|
|
OutStreamer.EmitLabel(PICBase);
|
|
return;
|
|
}
|
|
case PPC::LDtocJTI:
|
|
case PPC::LDtocCPT:
|
|
case PPC::LDtoc: {
|
|
// Transform %X3 = LDtoc <ga:@min1>, %X2
|
|
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
|
|
|
|
// Change the opcode to LD, and the global address operand to be a
|
|
// reference to the TOC entry we will synthesize later.
|
|
TmpInst.setOpcode(PPC::LD);
|
|
const MachineOperand &MO = MI->getOperand(1);
|
|
|
|
// Map symbol -> label of TOC entry
|
|
assert(MO.isGlobal() || MO.isCPI() || MO.isJTI());
|
|
MCSymbol *MOSymbol = 0;
|
|
if (MO.isGlobal())
|
|
MOSymbol = Mang->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_PPC_TOC_ENTRY,
|
|
OutContext);
|
|
TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
|
|
case PPC::ADDIStocHA: {
|
|
// 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
|
|
// address, then generate a TOC entry and reference that. Otherwise
|
|
// reference the symbol directly.
|
|
TmpInst.setOpcode(PPC::ADDIS8);
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
assert((MO.isGlobal() || MO.isCPI() || MO.isJTI()) &&
|
|
"Invalid operand for ADDIStocHA!");
|
|
MCSymbol *MOSymbol = 0;
|
|
bool IsExternal = false;
|
|
bool IsFunction = 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->resolveAliasedGlobal(false) : GValue;
|
|
MOSymbol = Mang->getSymbol(RealGValue);
|
|
const GlobalVariable *GVar = dyn_cast<GlobalVariable>(RealGValue);
|
|
IsExternal = GVar && !GVar->hasInitializer();
|
|
IsCommon = GVar && RealGValue->hasCommonLinkage();
|
|
IsFunction = !GVar;
|
|
IsAvailExt = GVar && RealGValue->hasAvailableExternallyLinkage();
|
|
} else if (MO.isCPI())
|
|
MOSymbol = GetCPISymbol(MO.getIndex());
|
|
else if (MO.isJTI())
|
|
MOSymbol = GetJTISymbol(MO.getIndex());
|
|
|
|
if (IsExternal || IsFunction || IsCommon || IsAvailExt || MO.isJTI())
|
|
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
|
|
|
|
const MCExpr *Exp =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC16_HA,
|
|
OutContext);
|
|
TmpInst.getOperand(2) = MCOperand::CreateExpr(Exp);
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case PPC::LDtocL: {
|
|
// Transform %Xd = LDtocL <ga:@sym>, %Xs
|
|
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
|
|
|
|
// Change the opcode to LDrs, which is a form of LD with the offset
|
|
// specified by a SymbolLo. If the global address is external, has
|
|
// common linkage, or is a jump table address, then reference the
|
|
// associated TOC entry. Otherwise reference the symbol directly.
|
|
TmpInst.setOpcode(PPC::LDrs);
|
|
const MachineOperand &MO = MI->getOperand(1);
|
|
assert((MO.isGlobal() || MO.isJTI() || MO.isCPI()) &&
|
|
"Invalid operand for LDtocL!");
|
|
MCSymbol *MOSymbol = 0;
|
|
|
|
if (MO.isJTI())
|
|
MOSymbol = lookUpOrCreateTOCEntry(GetJTISymbol(MO.getIndex()));
|
|
else if (MO.isCPI())
|
|
MOSymbol = GetCPISymbol(MO.getIndex());
|
|
else if (MO.isGlobal()) {
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
const GlobalAlias *GAlias = dyn_cast<GlobalAlias>(GValue);
|
|
const GlobalValue *RealGValue = GAlias ?
|
|
GAlias->resolveAliasedGlobal(false) : GValue;
|
|
MOSymbol = Mang->getSymbol(RealGValue);
|
|
const GlobalVariable *GVar = dyn_cast<GlobalVariable>(RealGValue);
|
|
|
|
if (!GVar || !GVar->hasInitializer() || RealGValue->hasCommonLinkage() ||
|
|
RealGValue->hasAvailableExternallyLinkage())
|
|
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
|
|
}
|
|
|
|
const MCExpr *Exp =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC16_LO,
|
|
OutContext);
|
|
TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case PPC::ADDItocL: {
|
|
// Transform %Xd = ADDItocL %Xs, <ga:@sym>
|
|
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
|
|
|
|
// Change the opcode to ADDI8L. If the global address is external, then
|
|
// generate a TOC entry and reference that. Otherwise reference the
|
|
// symbol directly.
|
|
TmpInst.setOpcode(PPC::ADDI8L);
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
assert((MO.isGlobal() || MO.isCPI()) && "Invalid operand for ADDItocL");
|
|
MCSymbol *MOSymbol = 0;
|
|
bool IsExternal = false;
|
|
bool IsFunction = false;
|
|
|
|
if (MO.isGlobal()) {
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
const GlobalAlias *GAlias = dyn_cast<GlobalAlias>(GValue);
|
|
const GlobalValue *RealGValue = GAlias ?
|
|
GAlias->resolveAliasedGlobal(false) : GValue;
|
|
MOSymbol = Mang->getSymbol(RealGValue);
|
|
const GlobalVariable *GVar = dyn_cast<GlobalVariable>(RealGValue);
|
|
IsExternal = GVar && !GVar->hasInitializer();
|
|
IsFunction = !GVar;
|
|
} else if (MO.isCPI())
|
|
MOSymbol = GetCPISymbol(MO.getIndex());
|
|
|
|
if (IsFunction || IsExternal)
|
|
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
|
|
|
|
const MCExpr *Exp =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC16_LO,
|
|
OutContext);
|
|
TmpInst.getOperand(2) = MCOperand::CreateExpr(Exp);
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case PPC::ADDISgotTprelHA: {
|
|
// Transform: %Xd = ADDISgotTprelHA %X2, <ga:@sym>
|
|
// Into: %Xd = ADDIS8 %X2, sym@got@tlsgd@ha
|
|
assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
MCSymbol *MOSymbol = Mang->getSymbol(GValue);
|
|
const MCExpr *SymGotTprel =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TPREL16_HA,
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::ADDIS8)
|
|
.addReg(MI->getOperand(0).getReg())
|
|
.addReg(PPC::X2)
|
|
.addExpr(SymGotTprel));
|
|
return;
|
|
}
|
|
case PPC::LDgotTprelL: {
|
|
// Transform %Xd = LDgotTprelL <ga:@sym>, %Xs
|
|
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
|
|
|
|
// Change the opcode to LDrs, which is a form of LD with the offset
|
|
// specified by a SymbolLo.
|
|
TmpInst.setOpcode(PPC::LDrs);
|
|
const MachineOperand &MO = MI->getOperand(1);
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
MCSymbol *MOSymbol = Mang->getSymbol(GValue);
|
|
const MCExpr *Exp =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TPREL16_LO,
|
|
OutContext);
|
|
TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
return;
|
|
}
|
|
case PPC::ADDIStlsgdHA: {
|
|
// Transform: %Xd = ADDIStlsgdHA %X2, <ga:@sym>
|
|
// Into: %Xd = ADDIS8 %X2, sym@got@tlsgd@ha
|
|
assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
MCSymbol *MOSymbol = Mang->getSymbol(GValue);
|
|
const MCExpr *SymGotTlsGD =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSGD16_HA,
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::ADDIS8)
|
|
.addReg(MI->getOperand(0).getReg())
|
|
.addReg(PPC::X2)
|
|
.addExpr(SymGotTlsGD));
|
|
return;
|
|
}
|
|
case PPC::ADDItlsgdL: {
|
|
// Transform: %Xd = ADDItlsgdL %Xs, <ga:@sym>
|
|
// Into: %Xd = ADDI8L %Xs, sym@got@tlsgd@l
|
|
assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
MCSymbol *MOSymbol = Mang->getSymbol(GValue);
|
|
const MCExpr *SymGotTlsGD =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSGD16_LO,
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::ADDI8L)
|
|
.addReg(MI->getOperand(0).getReg())
|
|
.addReg(MI->getOperand(1).getReg())
|
|
.addExpr(SymGotTlsGD));
|
|
return;
|
|
}
|
|
case PPC::GETtlsADDR: {
|
|
// Transform: %X3 = GETtlsADDR %X3, <ga:@sym>
|
|
// Into: BL8_NOP_ELF_TLSGD __tls_get_addr(sym@tlsgd)
|
|
assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
|
|
|
|
StringRef Name = "__tls_get_addr";
|
|
MCSymbol *TlsGetAddr = OutContext.GetOrCreateSymbol(Name);
|
|
const MCSymbolRefExpr *TlsRef =
|
|
MCSymbolRefExpr::Create(TlsGetAddr, MCSymbolRefExpr::VK_None, OutContext);
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
MCSymbol *MOSymbol = Mang->getSymbol(GValue);
|
|
const MCExpr *SymVar =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TLSGD,
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::BL8_NOP_ELF_TLSGD)
|
|
.addExpr(TlsRef)
|
|
.addExpr(SymVar));
|
|
return;
|
|
}
|
|
case PPC::ADDIStlsldHA: {
|
|
// Transform: %Xd = ADDIStlsldHA %X2, <ga:@sym>
|
|
// Into: %Xd = ADDIS8 %X2, sym@got@tlsld@ha
|
|
assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
MCSymbol *MOSymbol = Mang->getSymbol(GValue);
|
|
const MCExpr *SymGotTlsLD =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSLD16_HA,
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::ADDIS8)
|
|
.addReg(MI->getOperand(0).getReg())
|
|
.addReg(PPC::X2)
|
|
.addExpr(SymGotTlsLD));
|
|
return;
|
|
}
|
|
case PPC::ADDItlsldL: {
|
|
// Transform: %Xd = ADDItlsldL %Xs, <ga:@sym>
|
|
// Into: %Xd = ADDI8L %Xs, sym@got@tlsld@l
|
|
assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
MCSymbol *MOSymbol = Mang->getSymbol(GValue);
|
|
const MCExpr *SymGotTlsLD =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSLD16_LO,
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::ADDI8L)
|
|
.addReg(MI->getOperand(0).getReg())
|
|
.addReg(MI->getOperand(1).getReg())
|
|
.addExpr(SymGotTlsLD));
|
|
return;
|
|
}
|
|
case PPC::GETtlsldADDR: {
|
|
// Transform: %X3 = GETtlsldADDR %X3, <ga:@sym>
|
|
// Into: BL8_NOP_ELF_TLSLD __tls_get_addr(sym@tlsld)
|
|
assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
|
|
|
|
StringRef Name = "__tls_get_addr";
|
|
MCSymbol *TlsGetAddr = OutContext.GetOrCreateSymbol(Name);
|
|
const MCSymbolRefExpr *TlsRef =
|
|
MCSymbolRefExpr::Create(TlsGetAddr, MCSymbolRefExpr::VK_None, OutContext);
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
MCSymbol *MOSymbol = Mang->getSymbol(GValue);
|
|
const MCExpr *SymVar =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TLSLD,
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::BL8_NOP_ELF_TLSLD)
|
|
.addExpr(TlsRef)
|
|
.addExpr(SymVar));
|
|
return;
|
|
}
|
|
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");
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
MCSymbol *MOSymbol = Mang->getSymbol(GValue);
|
|
const MCExpr *SymDtprel =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL16_HA,
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::ADDIS8)
|
|
.addReg(MI->getOperand(0).getReg())
|
|
.addReg(PPC::X3)
|
|
.addExpr(SymDtprel));
|
|
return;
|
|
}
|
|
case PPC::ADDIdtprelL: {
|
|
// Transform: %Xd = ADDIdtprelL %Xs, <ga:@sym>
|
|
// Into: %Xd = ADDI8L %Xs, sym@dtprel@l
|
|
assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
|
|
const MachineOperand &MO = MI->getOperand(2);
|
|
const GlobalValue *GValue = MO.getGlobal();
|
|
MCSymbol *MOSymbol = Mang->getSymbol(GValue);
|
|
const MCExpr *SymDtprel =
|
|
MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL16_LO,
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::ADDI8L)
|
|
.addReg(MI->getOperand(0).getReg())
|
|
.addReg(MI->getOperand(1).getReg())
|
|
.addExpr(SymDtprel));
|
|
return;
|
|
}
|
|
case PPC::MFCRpseud:
|
|
case PPC::MFCR8pseud:
|
|
// Transform: %R3 = MFCRpseud %CR7
|
|
// Into: %R3 = MFCR ;; cr7
|
|
OutStreamer.AddComment(PPCInstPrinter::
|
|
getRegisterName(MI->getOperand(1).getReg()));
|
|
OutStreamer.EmitInstruction(MCInstBuilder(Subtarget.isPPC64() ? PPC::MFCR8 : PPC::MFCR)
|
|
.addReg(MI->getOperand(0).getReg()));
|
|
return;
|
|
case PPC::SYNC:
|
|
// In Book E sync is called msync, handle this special case here...
|
|
if (Subtarget.isBookE()) {
|
|
OutStreamer.EmitRawText(StringRef("\tmsync"));
|
|
return;
|
|
}
|
|
}
|
|
|
|
LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
|
|
OutStreamer.EmitInstruction(TmpInst);
|
|
}
|
|
|
|
void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
|
|
if (!Subtarget.isPPC64()) // linux/ppc32 - Normal entry label.
|
|
return AsmPrinter::EmitFunctionEntryLabel();
|
|
|
|
// Emit an official procedure descriptor.
|
|
const MCSection *Current = OutStreamer.getCurrentSection();
|
|
const MCSectionELF *Section = OutStreamer.getContext().getELFSection(".opd",
|
|
ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
|
|
SectionKind::getReadOnly());
|
|
OutStreamer.SwitchSection(Section);
|
|
OutStreamer.EmitLabel(CurrentFnSym);
|
|
OutStreamer.EmitValueToAlignment(8);
|
|
MCSymbol *Symbol1 =
|
|
OutContext.GetOrCreateSymbol(".L." + Twine(CurrentFnSym->getName()));
|
|
// Generates a R_PPC64_ADDR64 (from FK_DATA_8) relocation for the function
|
|
// entry point.
|
|
OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol1, OutContext),
|
|
8 /*size*/);
|
|
MCSymbol *Symbol2 = OutContext.GetOrCreateSymbol(StringRef(".TOC."));
|
|
// Generates a R_PPC64_TOC relocation for TOC base insertion.
|
|
OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol2,
|
|
MCSymbolRefExpr::VK_PPC_TOC, OutContext),
|
|
8/*size*/);
|
|
// Emit a null environment pointer.
|
|
OutStreamer.EmitIntValue(0, 8 /* size */);
|
|
OutStreamer.SwitchSection(Current);
|
|
|
|
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;
|
|
|
|
if (isPPC64 && !TOC.empty()) {
|
|
const MCSectionELF *Section = OutStreamer.getContext().getELFSection(".toc",
|
|
ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
|
|
SectionKind::getReadOnly());
|
|
OutStreamer.SwitchSection(Section);
|
|
|
|
for (MapVector<MCSymbol*, MCSymbol*>::iterator I = TOC.begin(),
|
|
E = TOC.end(); I != E; ++I) {
|
|
OutStreamer.EmitLabel(I->second);
|
|
MCSymbol *S = OutContext.GetOrCreateSymbol(I->first->getName());
|
|
OutStreamer.EmitTCEntry(*S);
|
|
}
|
|
}
|
|
|
|
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) {
|
|
// L_foo$stub:
|
|
OutStreamer.EmitLabel(Stubs[i].first);
|
|
// .long _foo
|
|
OutStreamer.EmitValue(MCSymbolRefExpr::Create(Stubs[i].second.getPointer(),
|
|
OutContext),
|
|
isPPC64 ? 8 : 4/*size*/, 0/*addrspace*/);
|
|
}
|
|
|
|
Stubs.clear();
|
|
OutStreamer.AddBlankLine();
|
|
}
|
|
|
|
return AsmPrinter::doFinalization(M);
|
|
}
|
|
|
|
/// EmitFunctionBodyEnd - Print the traceback table before the .size
|
|
/// directive.
|
|
///
|
|
void PPCLinuxAsmPrinter::EmitFunctionBodyEnd() {
|
|
// Only the 64-bit target requires a traceback table. For now,
|
|
// we only emit the word of zeroes that GDB requires to find
|
|
// the end of the function, and zeroes for the eight-byte
|
|
// mandatory fields.
|
|
// FIXME: We should fill in the eight-byte mandatory fields as described in
|
|
// the PPC64 ELF ABI (this is a low-priority item because GDB does not
|
|
// currently make use of these fields).
|
|
if (Subtarget.isPPC64()) {
|
|
OutStreamer.EmitIntValue(0, 4/*size*/);
|
|
OutStreamer.EmitIntValue(0, 8/*size*/);
|
|
}
|
|
}
|
|
|
|
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"
|
|
};
|
|
|
|
unsigned Directive = Subtarget.getDarwinDirective();
|
|
if (Subtarget.hasMFOCRF() && Directive < PPC::DIR_970)
|
|
Directive = PPC::DIR_970;
|
|
if (Subtarget.hasAltivec() && Directive < PPC::DIR_7400)
|
|
Directive = PPC::DIR_7400;
|
|
if (Subtarget.isPPC64() && Directive < PPC::DIR_64)
|
|
Directive = PPC::DIR_64;
|
|
assert(Directive <= PPC::DIR_64 && "Directive out of range.");
|
|
|
|
// FIXME: This is a total hack, finish mc'izing the PPC backend.
|
|
if (OutStreamer.hasRawTextSupport()) {
|
|
assert(Directive < sizeof(CPUDirectives) / sizeof(*CPUDirectives) &&
|
|
"CPUDirectives[] might not be up-to-date!");
|
|
OutStreamer.EmitRawText("\t.machine " + Twine(CPUDirectives[Directive]));
|
|
}
|
|
|
|
// Prime text sections so they are adjacent. This reduces the likelihood a
|
|
// large data or debug section causes a branch to exceed 16M limit.
|
|
const TargetLoweringObjectFileMachO &TLOFMacho =
|
|
static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
|
|
OutStreamer.SwitchSection(TLOFMacho.getTextCoalSection());
|
|
if (TM.getRelocationModel() == Reloc::PIC_) {
|
|
OutStreamer.SwitchSection(
|
|
OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
|
|
MCSectionMachO::S_SYMBOL_STUBS |
|
|
MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
|
|
32, SectionKind::getText()));
|
|
} else if (TM.getRelocationModel() == Reloc::DynamicNoPIC) {
|
|
OutStreamer.SwitchSection(
|
|
OutContext.getMachOSection("__TEXT","__symbol_stub1",
|
|
MCSectionMachO::S_SYMBOL_STUBS |
|
|
MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
|
|
16, SectionKind::getText()));
|
|
}
|
|
OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
|
|
}
|
|
|
|
static MCSymbol *GetLazyPtr(MCSymbol *Sym, MCContext &Ctx) {
|
|
// Remove $stub suffix, add $lazy_ptr.
|
|
StringRef NoStub = Sym->getName().substr(0, Sym->getName().size()-5);
|
|
return Ctx.GetOrCreateSymbol(NoStub + "$lazy_ptr");
|
|
}
|
|
|
|
static MCSymbol *GetAnonSym(MCSymbol *Sym, MCContext &Ctx) {
|
|
// Add $tmp suffix to $stub, yielding $stub$tmp.
|
|
return Ctx.GetOrCreateSymbol(Sym->getName() + "$tmp");
|
|
}
|
|
|
|
void PPCDarwinAsmPrinter::
|
|
EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs) {
|
|
bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
|
|
|
|
const TargetLoweringObjectFileMachO &TLOFMacho =
|
|
static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
|
|
|
|
// .lazy_symbol_pointer
|
|
const MCSection *LSPSection = TLOFMacho.getLazySymbolPointerSection();
|
|
|
|
// Output stubs for dynamically-linked functions
|
|
if (TM.getRelocationModel() == Reloc::PIC_) {
|
|
const MCSection *StubSection =
|
|
OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
|
|
MCSectionMachO::S_SYMBOL_STUBS |
|
|
MCSectionMachO::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);
|
|
|
|
// mflr r0
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::MFLR).addReg(PPC::R0));
|
|
// FIXME: MCize this.
|
|
OutStreamer.EmitRawText("\tbcl 20, 31, " + Twine(AnonSymbol->getName()));
|
|
OutStreamer.EmitLabel(AnonSymbol);
|
|
// mflr r11
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::MFLR).addReg(PPC::R11));
|
|
// addis r11, r11, ha16(LazyPtr - AnonSymbol)
|
|
const MCExpr *Sub =
|
|
MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(LazyPtr, OutContext),
|
|
MCSymbolRefExpr::Create(AnonSymbol, OutContext),
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::ADDIS)
|
|
.addReg(PPC::R11)
|
|
.addReg(PPC::R11)
|
|
.addExpr(Sub));
|
|
// mtlr r0
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::MTLR).addReg(PPC::R0));
|
|
|
|
// ldu r12, lo16(LazyPtr - AnonSymbol)(r11)
|
|
// lwzu r12, lo16(LazyPtr - AnonSymbol)(r11)
|
|
OutStreamer.EmitInstruction(MCInstBuilder(isPPC64 ? PPC::LDU : PPC::LWZU)
|
|
.addReg(PPC::R12)
|
|
.addExpr(Sub).addExpr(Sub)
|
|
.addReg(PPC::R11));
|
|
// mtctr r12
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::MTCTR).addReg(PPC::R12));
|
|
// bctr
|
|
OutStreamer.EmitInstruction(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) {
|
|
// .quad dyld_stub_binding_helper
|
|
OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 8);
|
|
} else {
|
|
// .long dyld_stub_binding_helper
|
|
OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 4);
|
|
}
|
|
}
|
|
OutStreamer.AddBlankLine();
|
|
return;
|
|
}
|
|
|
|
const MCSection *StubSection =
|
|
OutContext.getMachOSection("__TEXT","__symbol_stub1",
|
|
MCSectionMachO::S_SYMBOL_STUBS |
|
|
MCSectionMachO::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);
|
|
|
|
OutStreamer.SwitchSection(StubSection);
|
|
EmitAlignment(4);
|
|
OutStreamer.EmitLabel(Stub);
|
|
OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
|
|
// lis r11, ha16(LazyPtr)
|
|
const MCExpr *LazyPtrHa16 =
|
|
MCSymbolRefExpr::Create(LazyPtr, MCSymbolRefExpr::VK_PPC_DARWIN_HA16,
|
|
OutContext);
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::LIS)
|
|
.addReg(PPC::R11)
|
|
.addExpr(LazyPtrHa16));
|
|
|
|
const MCExpr *LazyPtrLo16 =
|
|
MCSymbolRefExpr::Create(LazyPtr, MCSymbolRefExpr::VK_PPC_DARWIN_LO16,
|
|
OutContext);
|
|
// ldu r12, lo16(LazyPtr)(r11)
|
|
// lwzu r12, lo16(LazyPtr)(r11)
|
|
OutStreamer.EmitInstruction(MCInstBuilder(isPPC64 ? PPC::LDU : PPC::LWZU)
|
|
.addReg(PPC::R12)
|
|
.addExpr(LazyPtrLo16).addExpr(LazyPtrLo16)
|
|
.addReg(PPC::R11));
|
|
|
|
// mtctr r12
|
|
OutStreamer.EmitInstruction(MCInstBuilder(PPC::MTCTR).addReg(PPC::R12));
|
|
// bctr
|
|
OutStreamer.EmitInstruction(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) {
|
|
// .quad dyld_stub_binding_helper
|
|
OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 8);
|
|
} else {
|
|
// .long dyld_stub_binding_helper
|
|
OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 4);
|
|
}
|
|
}
|
|
|
|
OutStreamer.AddBlankLine();
|
|
}
|
|
|
|
|
|
bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
|
|
bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
|
|
|
|
// Darwin/PPC always uses mach-o.
|
|
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) {
|
|
// Add the (possibly multiple) personalities to the set of global values.
|
|
// Only referenced functions get into the Personalities list.
|
|
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(Mang->getSymbol(*I), true);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Output stubs for dynamically-linked functions.
|
|
Stubs = MMIMacho.GetGVStubList();
|
|
|
|
// Output macho stubs for external and common global variables.
|
|
if (!Stubs.empty()) {
|
|
// Switch with ".non_lazy_symbol_pointer" directive.
|
|
OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
|
|
EmitAlignment(isPPC64 ? 3 : 2);
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
// L_foo$stub:
|
|
OutStreamer.EmitLabel(Stubs[i].first);
|
|
// .indirect_symbol _foo
|
|
MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
|
|
OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol);
|
|
|
|
if (MCSym.getInt())
|
|
// External to current translation unit.
|
|
OutStreamer.EmitIntValue(0, isPPC64 ? 8 : 4/*size*/);
|
|
else
|
|
// Internal to current translation unit.
|
|
//
|
|
// When we place the LSDA into the TEXT section, the type info pointers
|
|
// need to be indirect and pc-rel. We accomplish this by using NLPs.
|
|
// However, sometimes the types are local to the file. So we need to
|
|
// fill in the value for the NLP in those cases.
|
|
OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
|
|
OutContext),
|
|
isPPC64 ? 8 : 4/*size*/);
|
|
}
|
|
|
|
Stubs.clear();
|
|
OutStreamer.AddBlankLine();
|
|
}
|
|
|
|
Stubs = MMIMacho.GetHiddenGVStubList();
|
|
if (!Stubs.empty()) {
|
|
OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
|
|
EmitAlignment(isPPC64 ? 3 : 2);
|
|
|
|
for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
|
|
// L_foo$stub:
|
|
OutStreamer.EmitLabel(Stubs[i].first);
|
|
// .long _foo
|
|
OutStreamer.EmitValue(MCSymbolRefExpr::
|
|
Create(Stubs[i].second.getPointer(),
|
|
OutContext),
|
|
isPPC64 ? 8 : 4/*size*/);
|
|
}
|
|
|
|
Stubs.clear();
|
|
OutStreamer.AddBlankLine();
|
|
}
|
|
|
|
// Funny Darwin hack: This flag tells the linker that no global symbols
|
|
// contain code that falls through to other global symbols (e.g. the obvious
|
|
// implementation of multiple entry points). If this doesn't occur, the
|
|
// linker can safely perform dead code stripping. Since LLVM never generates
|
|
// code that does this, it is always safe to set.
|
|
OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
|
|
|
|
return AsmPrinter::doFinalization(M);
|
|
}
|
|
|
|
/// createPPCAsmPrinterPass - Returns a pass that prints the PPC assembly code
|
|
/// for a MachineFunction to the given output stream, in a format that the
|
|
/// Darwin assembler can deal with.
|
|
///
|
|
static AsmPrinter *createPPCAsmPrinterPass(TargetMachine &tm,
|
|
MCStreamer &Streamer) {
|
|
const PPCSubtarget *Subtarget = &tm.getSubtarget<PPCSubtarget>();
|
|
|
|
if (Subtarget->isDarwin())
|
|
return new PPCDarwinAsmPrinter(tm, Streamer);
|
|
return new PPCLinuxAsmPrinter(tm, Streamer);
|
|
}
|
|
|
|
// Force static initialization.
|
|
extern "C" void LLVMInitializePowerPCAsmPrinter() {
|
|
TargetRegistry::RegisterAsmPrinter(ThePPC32Target, createPPCAsmPrinterPass);
|
|
TargetRegistry::RegisterAsmPrinter(ThePPC64Target, createPPCAsmPrinterPass);
|
|
}
|