Initial revision
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14283 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCAsmPrinter.cpp b/lib/Target/PowerPC/PPCAsmPrinter.cpp
new file mode 100644
index 0000000..697be09
--- /dev/null
+++ b/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -0,0 +1,694 @@
+//===-- PPC32/Printer.cpp - Convert X86 LLVM code to Intel assembly ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and 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 Intel-format
+// assembly language. This printer is the output mechanism used
+// by `llc' and `lli -print-machineinstrs' on X86.
+//
+//===----------------------------------------------------------------------===//
+
+#include <set>
+
+#include "PowerPC.h"
+#include "PowerPCInstrInfo.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Support/Mangler.h"
+#include "Support/Statistic.h"
+#include "Support/StringExtras.h"
+#include "Support/CommandLine.h"
+
+namespace llvm {
+
+namespace {
+ Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
+
+ struct Printer : public MachineFunctionPass {
+ /// Output stream on which we're printing assembly code.
+ ///
+ std::ostream &O;
+
+ /// Target machine description which we query for reg. names, data
+ /// layout, etc.
+ ///
+ TargetMachine &TM;
+
+ /// Name-mangler for global names.
+ ///
+ Mangler *Mang;
+ std::set< std::string > Stubs;
+ std::set<std::string> Strings;
+
+ Printer(std::ostream &o, TargetMachine &tm) : O(o), TM(tm) { }
+
+ /// We name each basic block in a Function with a unique number, so
+ /// that we can consistently refer to them later. This is cleared
+ /// at the beginning of each call to runOnMachineFunction().
+ ///
+ typedef std::map<const Value *, unsigned> ValueMapTy;
+ ValueMapTy NumberForBB;
+
+ /// Cache of mangled name for current function. This is
+ /// recalculated at the beginning of each call to
+ /// runOnMachineFunction().
+ ///
+ std::string CurrentFnName;
+
+ virtual const char *getPassName() const {
+ return "PowerPC Assembly Printer";
+ }
+
+ void printMachineInstruction(const MachineInstr *MI);
+ void printOp(const MachineOperand &MO,
+ bool elideOffsetKeyword = false);
+ void printConstantPool(MachineConstantPool *MCP);
+ bool runOnMachineFunction(MachineFunction &F);
+ bool doInitialization(Module &M);
+ bool doFinalization(Module &M);
+ void emitGlobalConstant(const Constant* CV);
+ void emitConstantValueOnly(const Constant *CV);
+ };
+} // end of anonymous namespace
+
+/// createPPCCodePrinterPass - Returns a pass that prints the X86
+/// assembly code for a MachineFunction to the given output stream,
+/// using the given target machine description. This should work
+/// regardless of whether the function is in SSA form.
+///
+FunctionPass *createPPCCodePrinterPass(std::ostream &o,TargetMachine &tm){
+ return new Printer(o, tm);
+}
+
+/// isStringCompatible - Can we treat the specified array as a string?
+/// Only if it is an array of ubytes or non-negative sbytes.
+///
+static bool isStringCompatible(const ConstantArray *CVA) {
+ const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
+ if (ETy == Type::UByteTy) return true;
+ if (ETy != Type::SByteTy) return false;
+
+ for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
+ if (cast<ConstantSInt>(CVA->getOperand(i))->getValue() < 0)
+ return false;
+
+ return true;
+}
+
+/// toOctal - Convert the low order bits of X into an octal digit.
+///
+static inline char toOctal(int X) {
+ return (X&7)+'0';
+}
+
+/// getAsCString - Return the specified array as a C compatible
+/// string, only if the predicate isStringCompatible is true.
+///
+static void printAsCString(std::ostream &O, const ConstantArray *CVA) {
+ assert(isStringCompatible(CVA) && "Array is not string compatible!");
+
+ O << "\"";
+ for (unsigned i = 0; i < CVA->getNumOperands(); ++i) {
+ unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
+
+ if (C == '"') {
+ O << "\\\"";
+ } else if (C == '\\') {
+ O << "\\\\";
+ } else if (isprint(C)) {
+ O << C;
+ } else {
+ switch(C) {
+ case '\b': O << "\\b"; break;
+ case '\f': O << "\\f"; break;
+ case '\n': O << "\\n"; break;
+ case '\r': O << "\\r"; break;
+ case '\t': O << "\\t"; break;
+ default:
+ O << '\\';
+ O << toOctal(C >> 6);
+ O << toOctal(C >> 3);
+ O << toOctal(C >> 0);
+ break;
+ }
+ }
+ }
+ O << "\"";
+}
+
+// Print out the specified constant, without a storage class. Only the
+// constants valid in constant expressions can occur here.
+void Printer::emitConstantValueOnly(const Constant *CV) {
+ if (CV->isNullValue())
+ O << "0";
+ else if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
+ assert(CB == ConstantBool::True);
+ O << "1";
+ } else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
+ O << CI->getValue();
+ else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
+ O << CI->getValue();
+ else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
+ // This is a constant address for a global variable or function. Use the
+ // name of the variable or function as the address value.
+ O << Mang->getValueName(CPR->getValue());
+ else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
+ const TargetData &TD = TM.getTargetData();
+ switch(CE->getOpcode()) {
+ case Instruction::GetElementPtr: {
+ // generate a symbolic expression for the byte address
+ const Constant *ptrVal = CE->getOperand(0);
+ std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
+ if (unsigned Offset = TD.getIndexedOffset(ptrVal->getType(), idxVec)) {
+ O << "(";
+ emitConstantValueOnly(ptrVal);
+ O << ") + " << Offset;
+ } else {
+ emitConstantValueOnly(ptrVal);
+ }
+ break;
+ }
+ case Instruction::Cast: {
+ // Support only non-converting or widening casts for now, that is, ones
+ // that do not involve a change in value. This assertion is really gross,
+ // and may not even be a complete check.
+ Constant *Op = CE->getOperand(0);
+ const Type *OpTy = Op->getType(), *Ty = CE->getType();
+
+ // Remember, kids, pointers on x86 can be losslessly converted back and
+ // forth into 32-bit or wider integers, regardless of signedness. :-P
+ assert(((isa<PointerType>(OpTy)
+ && (Ty == Type::LongTy || Ty == Type::ULongTy
+ || Ty == Type::IntTy || Ty == Type::UIntTy))
+ || (isa<PointerType>(Ty)
+ && (OpTy == Type::LongTy || OpTy == Type::ULongTy
+ || OpTy == Type::IntTy || OpTy == Type::UIntTy))
+ || (((TD.getTypeSize(Ty) >= TD.getTypeSize(OpTy))
+ && OpTy->isLosslesslyConvertibleTo(Ty))))
+ && "FIXME: Don't yet support this kind of constant cast expr");
+ O << "(";
+ emitConstantValueOnly(Op);
+ O << ")";
+ break;
+ }
+ case Instruction::Add:
+ O << "(";
+ emitConstantValueOnly(CE->getOperand(0));
+ O << ") + (";
+ emitConstantValueOnly(CE->getOperand(1));
+ O << ")";
+ break;
+ default:
+ assert(0 && "Unsupported operator!");
+ }
+ } else {
+ assert(0 && "Unknown constant value!");
+ }
+}
+
+// Print a constant value or values, with the appropriate storage class as a
+// prefix.
+void Printer::emitGlobalConstant(const Constant *CV) {
+ const TargetData &TD = TM.getTargetData();
+
+ if (CV->isNullValue()) {
+ O << "\t.space\t " << TD.getTypeSize(CV->getType()) << "\n";
+ return;
+ } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
+ if (isStringCompatible(CVA)) {
+ O << ".ascii";
+ printAsCString(O, CVA);
+ O << "\n";
+ } else { // Not a string. Print the values in successive locations
+ const std::vector<Use> &constValues = CVA->getValues();
+ for (unsigned i=0; i < constValues.size(); i++)
+ emitGlobalConstant(cast<Constant>(constValues[i].get()));
+ }
+ return;
+ } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
+ // Print the fields in successive locations. Pad to align if needed!
+ const StructLayout *cvsLayout = TD.getStructLayout(CVS->getType());
+ const std::vector<Use>& constValues = CVS->getValues();
+ unsigned sizeSoFar = 0;
+ for (unsigned i=0, N = constValues.size(); i < N; i++) {
+ const Constant* field = cast<Constant>(constValues[i].get());
+
+ // Check if padding is needed and insert one or more 0s.
+ unsigned fieldSize = TD.getTypeSize(field->getType());
+ unsigned padSize = ((i == N-1? cvsLayout->StructSize
+ : cvsLayout->MemberOffsets[i+1])
+ - cvsLayout->MemberOffsets[i]) - fieldSize;
+ sizeSoFar += fieldSize + padSize;
+
+ // Now print the actual field value
+ emitGlobalConstant(field);
+
+ // Insert the field padding unless it's zero bytes...
+ if (padSize)
+ O << "\t.space\t " << padSize << "\n";
+ }
+ assert(sizeSoFar == cvsLayout->StructSize &&
+ "Layout of constant struct may be incorrect!");
+ return;
+ } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
+ // FP Constants are printed as integer constants to avoid losing
+ // precision...
+ double Val = CFP->getValue();
+ switch (CFP->getType()->getPrimitiveID()) {
+ default: assert(0 && "Unknown floating point type!");
+ case Type::FloatTyID: {
+ union FU { // Abide by C TBAA rules
+ float FVal;
+ unsigned UVal;
+ } U;
+ U.FVal = Val;
+ O << ".long\t" << U.UVal << "\t# float " << Val << "\n";
+ return;
+ }
+ case Type::DoubleTyID: {
+ union DU { // Abide by C TBAA rules
+ double FVal;
+ uint64_t UVal;
+ struct {
+ uint32_t MSWord;
+ uint32_t LSWord;
+ } T;
+ } U;
+ U.FVal = Val;
+
+ O << ".long\t" << U.T.MSWord << "\t# double most significant word " << Val << "\n";
+ O << ".long\t" << U.T.LSWord << "\t# double least significant word" << Val << "\n";
+ return;
+ }
+ }
+ } else if (CV->getType()->getPrimitiveSize() == 64) {
+ const ConstantInt *CI = dyn_cast<ConstantInt>(CV);
+ if(CI) {
+ union DU { // Abide by C TBAA rules
+ int64_t UVal;
+ struct {
+ uint32_t MSWord;
+ uint32_t LSWord;
+ } T;
+ } U;
+ U.UVal = CI->getRawValue();
+
+ O << ".long\t" << U.T.MSWord << "\t# Double-word most significant word " << U.UVal << "\n";
+ O << ".long\t" << U.T.LSWord << "\t# Double-word least significant word" << U.UVal << "\n";
+ return;
+ }
+ }
+
+ const Type *type = CV->getType();
+ O << "\t";
+ switch (type->getPrimitiveID()) {
+ case Type::UByteTyID: case Type::SByteTyID:
+ O << ".byte";
+ break;
+ case Type::UShortTyID: case Type::ShortTyID:
+ O << ".short";
+ break;
+ case Type::BoolTyID:
+ case Type::PointerTyID:
+ case Type::UIntTyID: case Type::IntTyID:
+ O << ".long";
+ break;
+ case Type::ULongTyID: case Type::LongTyID:
+ assert (0 && "Should have already output double-word constant.");
+ case Type::FloatTyID: case Type::DoubleTyID:
+ assert (0 && "Should have already output floating point constant.");
+ default:
+ assert (0 && "Can't handle printing this type of thing");
+ break;
+ }
+ O << "\t";
+ emitConstantValueOnly(CV);
+ O << "\n";
+}
+
+/// printConstantPool - Print to the current output stream assembly
+/// representations of the constants in the constant pool MCP. This is
+/// used to print out constants which have been "spilled to memory" by
+/// the code generator.
+///
+void Printer::printConstantPool(MachineConstantPool *MCP) {
+ const std::vector<Constant*> &CP = MCP->getConstants();
+ const TargetData &TD = TM.getTargetData();
+
+ if (CP.empty()) return;
+
+ for (unsigned i = 0, e = CP.size(); i != e; ++i) {
+ O << "\t.const\n";
+ O << "\t.align " << (unsigned)TD.getTypeAlignment(CP[i]->getType())
+ << "\n";
+ O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t#"
+ << *CP[i] << "\n";
+ emitGlobalConstant(CP[i]);
+ }
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool Printer::runOnMachineFunction(MachineFunction &MF) {
+ // BBNumber is used here so that a given Printer will never give two
+ // BBs the same name. (If you have a better way, please let me know!)
+ static unsigned BBNumber = 0;
+
+ O << "\n\n";
+ // What's my mangled name?
+ CurrentFnName = Mang->getValueName(MF.getFunction());
+
+ // Print out constants referenced by the function
+ printConstantPool(MF.getConstantPool());
+
+ // Print out labels for the function.
+ O << "\t.text\n";
+ O << "\t.globl\t" << CurrentFnName << "\n";
+ O << "\t.align 5\n";
+ O << CurrentFnName << ":\n";
+
+ // Number each basic block so that we can consistently refer to them
+ // in PC-relative references.
+ NumberForBB.clear();
+ for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+ I != E; ++I) {
+ NumberForBB[I->getBasicBlock()] = BBNumber++;
+ }
+
+ // Print out code for the function.
+ for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+ I != E; ++I) {
+ // Print a label for the basic block.
+ O << "L" << NumberForBB[I->getBasicBlock()] << ":\t# "
+ << I->getBasicBlock()->getName() << "\n";
+ for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+ II != E; ++II) {
+ // Print the assembly for the instruction.
+ O << "\t";
+ printMachineInstruction(II);
+ }
+ }
+
+ // We didn't modify anything.
+ return false;
+}
+
+
+
+void Printer::printOp(const MachineOperand &MO,
+ bool elideOffsetKeyword /* = false */) {
+ const MRegisterInfo &RI = *TM.getRegisterInfo();
+ int new_symbol;
+
+ switch (MO.getType()) {
+ case MachineOperand::MO_VirtualRegister:
+ if (Value *V = MO.getVRegValueOrNull()) {
+ O << "<" << V->getName() << ">";
+ return;
+ }
+ // FALLTHROUGH
+ case MachineOperand::MO_MachineRegister:
+ O << RI.get(MO.getReg()).Name;
+ return;
+
+ case MachineOperand::MO_SignExtendedImmed:
+ case MachineOperand::MO_UnextendedImmed:
+ O << (int)MO.getImmedValue();
+ return;
+ case MachineOperand::MO_MachineBasicBlock: {
+ MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
+ O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
+ << "_" << MBBOp->getNumber () << "\t# "
+ << MBBOp->getBasicBlock ()->getName ();
+ return;
+ }
+ case MachineOperand::MO_PCRelativeDisp:
+ std::cerr << "Shouldn't use addPCDisp() when building PPC MachineInstrs";
+ abort ();
+ return;
+ case MachineOperand::MO_GlobalAddress:
+ if (!elideOffsetKeyword) {
+ if(isa<Function>(MO.getGlobal())) {
+ Stubs.insert(Mang->getValueName(MO.getGlobal()));
+ O << "L" << Mang->getValueName(MO.getGlobal()) << "$stub";
+ } else {
+ O << Mang->getValueName(MO.getGlobal());
+ }
+ }
+ return;
+ case MachineOperand::MO_ExternalSymbol:
+ O << MO.getSymbolName();
+ return;
+ default:
+ O << "<unknown operand type>"; return;
+ }
+}
+
+#if 0
+static inline
+unsigned int ValidOpcodes(const MachineInstr *MI, unsigned int ArgType[5]) {
+ int i;
+ unsigned int retval = 1;
+
+ for(i = 0; i<5; i++) {
+ switch(ArgType[i]) {
+ case none:
+ break;
+ case Gpr:
+ case Gpr0:
+ Type::UIntTy
+ case Simm16:
+ case Zimm16:
+ case PCRelimm24:
+ case Imm24:
+ case Imm5:
+ case PCRelimm14:
+ case Imm14:
+ case Imm2:
+ case Crf:
+ case Imm3:
+ case Imm1:
+ case Fpr:
+ case Imm4:
+ case Imm8:
+ case Disimm16:
+ case Spr:
+ case Sgr:
+ };
+
+ }
+ }
+}
+#endif
+
+/// printMachineInstruction -- Print out a single PPC32 LLVM instruction
+/// MI in Darwin syntax to the current output stream.
+///
+void Printer::printMachineInstruction(const MachineInstr *MI) {
+ unsigned Opcode = MI->getOpcode();
+ const TargetInstrInfo &TII = *TM.getInstrInfo();
+ const TargetInstrDescriptor &Desc = TII.get(Opcode);
+ unsigned int i;
+
+ unsigned int ArgCount = Desc.TSFlags & PPC32II::ArgCountMask;
+ unsigned int ArgType[5];
+
+
+ ArgType[0] = (Desc.TSFlags>>PPC32II::Arg0TypeShift) & PPC32II::ArgTypeMask;
+ ArgType[1] = (Desc.TSFlags>>PPC32II::Arg1TypeShift) & PPC32II::ArgTypeMask;
+ ArgType[2] = (Desc.TSFlags>>PPC32II::Arg2TypeShift) & PPC32II::ArgTypeMask;
+ ArgType[3] = (Desc.TSFlags>>PPC32II::Arg3TypeShift) & PPC32II::ArgTypeMask;
+ ArgType[4] = (Desc.TSFlags>>PPC32II::Arg4TypeShift) & PPC32II::ArgTypeMask;
+
+ assert ( ((Desc.TSFlags & PPC32II::VMX) == 0) && "Instruction requires VMX support");
+ assert ( ((Desc.TSFlags & PPC32II::PPC64) == 0) && "Instruction requires 64 bit support");
+ //assert ( ValidOpcodes(MI, ArgType) && "Instruction has invalid inputs");
+ ++EmittedInsts;
+
+ if(Opcode == PPC32::MovePCtoLR) {
+ O << "mflr r0\n";
+ O << "bcl 20,31,L" << CurrentFnName << "$pb\n";
+ O << "L" << CurrentFnName << "$pb:\n";
+ return;
+ }
+
+ O << TII.getName(MI->getOpcode()) << " ";
+ std::cout << TII.getName(MI->getOpcode()) << " expects " << ArgCount << " args\n";
+
+ if(Opcode == PPC32::LOADLoAddr) {
+ printOp(MI->getOperand(0));
+ O << ", ";
+ printOp(MI->getOperand(1));
+ O << ", lo16(";
+ printOp(MI->getOperand(2));
+ O << "-L" << CurrentFnName << "$pb)\n";
+ return;
+ }
+
+ if(Opcode == PPC32::LOADHiAddr) {
+ printOp(MI->getOperand(0));
+ O << ", ";
+ printOp(MI->getOperand(1));
+ O << ", ha16(" ;
+ printOp(MI->getOperand(2));
+ O << "-L" << CurrentFnName << "$pb)\n";
+ return;
+ }
+
+ if( (ArgCount == 3) && (ArgType[1] == PPC32II::Disimm16) ) {
+ printOp(MI->getOperand(0));
+ O << ", ";
+ printOp(MI->getOperand(1));
+ O << "(";
+ if((ArgType[2] == PPC32II::Gpr0) && (MI->getOperand(2).getReg() == PPC32::R0)) {
+ O << "0";
+ } else {
+ printOp(MI->getOperand(2));
+ }
+ O << ")\n";
+ } else {
+ for(i = 0; i< ArgCount; i++) {
+ if( (ArgType[i] == PPC32II::Gpr0) && ((MI->getOperand(i).getReg()) == PPC32::R0)) {
+ O << "0";
+ } else {
+ //std::cout << "DEBUG " << (*(TM.getRegisterInfo())).get(MI->getOperand(i).getReg()).Name << "\n";
+ printOp(MI->getOperand(i));
+ }
+ if( ArgCount - 1 == i) {
+ O << "\n";
+ } else {
+ O << ", ";
+ }
+ }
+ }
+
+ return;
+}
+
+bool Printer::doInitialization(Module &M) {
+ // Tell gas we are outputting Intel syntax (not AT&T syntax) assembly.
+ //
+ // Bug: gas in `intel_syntax noprefix' mode interprets the symbol `Sp' in an
+ // instruction as a reference to the register named sp, and if you try to
+ // reference a symbol `Sp' (e.g. `mov ECX, OFFSET Sp') then it gets lowercased
+ // before being looked up in the symbol table. This creates spurious
+ // `undefined symbol' errors when linking. Workaround: Do not use `noprefix'
+ // mode, and decorate all register names with percent signs.
+ // O << "\t.intel_syntax\n";
+ Mang = new Mangler(M, true);
+ return false; // success
+}
+
+// SwitchSection - Switch to the specified section of the executable if we are
+// not already in it!
+//
+static void SwitchSection(std::ostream &OS, std::string &CurSection,
+ const char *NewSection) {
+ if (CurSection != NewSection) {
+ CurSection = NewSection;
+ if (!CurSection.empty())
+ OS << "\t" << NewSection << "\n";
+ }
+}
+
+bool Printer::doFinalization(Module &M) {
+ const TargetData &TD = TM.getTargetData();
+ std::string CurSection;
+
+ // Print out module-level global variables here.
+ for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
+ if (I->hasInitializer()) { // External global require no code
+ O << "\n\n";
+ std::string name = Mang->getValueName(I);
+ Constant *C = I->getInitializer();
+ unsigned Size = TD.getTypeSize(C->getType());
+ unsigned Align = TD.getTypeAlignment(C->getType());
+
+ if (C->isNullValue() &&
+ (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
+ I->hasWeakLinkage() /* FIXME: Verify correct */)) {
+ SwitchSection(O, CurSection, ".data");
+ if (I->hasInternalLinkage())
+ O << "\t.local " << name << "\n";
+
+ O << "\t.comm " << name << "," << TD.getTypeSize(C->getType())
+ << "," << (unsigned)TD.getTypeAlignment(C->getType());
+ O << "\t\t# ";
+ WriteAsOperand(O, I, true, true, &M);
+ O << "\n";
+ } else {
+ switch (I->getLinkage()) {
+ case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
+ // Nonnull linkonce -> weak
+ O << "\t.weak " << name << "\n";
+ SwitchSection(O, CurSection, "");
+ O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
+ break;
+
+ case GlobalValue::AppendingLinkage:
+ // FIXME: appending linkage variables should go into a section of
+ // their name or something. For now, just emit them as external.
+ case GlobalValue::ExternalLinkage:
+ // If external or appending, declare as a global symbol
+ O << "\t.globl " << name << "\n";
+ // FALL THROUGH
+ case GlobalValue::InternalLinkage:
+ if (C->isNullValue())
+ SwitchSection(O, CurSection, ".bss");
+ else
+ SwitchSection(O, CurSection, ".data");
+ break;
+ }
+
+ O << "\t.align " << Align << "\n";
+ O << name << ":\t\t\t\t# ";
+ WriteAsOperand(O, I, true, true, &M);
+ O << " = ";
+ WriteAsOperand(O, C, false, false, &M);
+ O << "\n";
+ emitGlobalConstant(C);
+ }
+ }
+
+ for(std::set<std::string>::iterator i = Stubs.begin(); i != Stubs.end(); ++i) {
+ O << ".data\n";
+ O << ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32\n";
+ O << "\t.align 2\n";
+ O << "L" << *i << "$stub:\n";
+ O << "\t.indirect_symbol " << *i << "\n";
+ O << "\tmflr r0\n";
+ O << "\tbcl 20,31,L0$" << *i << "\n";
+ O << "L0$" << *i << ":\n";
+ O << "\tmflr r11\n";
+ O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n";
+ O << "\tmtlr r0\n";
+ O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
+ O << "\tmtctr r12\n";
+ O << "\tbctr\n";
+ O << ".data\n";
+ O << ".lazy_symbol_pointer\n";
+ O << "L" << *i << "$lazy_ptr:\n";
+ O << ".indirect_symbol " << *i << "\n";
+ O << ".long dyld_stub_binding_helper\n";
+
+ }
+
+ delete Mang;
+ return false; // success
+}
+
+} // End llvm namespace