1 //===-- PPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains a printer that converts from our internal representation
11 // of machine-dependent LLVM code to PowerPC assembly language. This printer is
12 // the output mechanism used by `llc'.
14 // Documentation at http://developer.apple.com/documentation/DeveloperTools/
15 // Reference/Assembler/ASMIntroduction/chapter_1_section_1.html
17 //===----------------------------------------------------------------------===//
19 #define DEBUG_TYPE "asmprinter"
21 #include "InstPrinter/PPCInstPrinter.h"
22 #include "MCTargetDesc/PPCMCExpr.h"
23 #include "MCTargetDesc/PPCPredicates.h"
24 #include "PPCSubtarget.h"
25 #include "PPCTargetMachine.h"
26 #include "PPCTargetStreamer.h"
27 #include "llvm/ADT/MapVector.h"
28 #include "llvm/ADT/SmallString.h"
29 #include "llvm/ADT/StringExtras.h"
30 #include "llvm/CodeGen/AsmPrinter.h"
31 #include "llvm/CodeGen/MachineFunctionPass.h"
32 #include "llvm/CodeGen/MachineInstr.h"
33 #include "llvm/CodeGen/MachineInstrBuilder.h"
34 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
35 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
36 #include "llvm/IR/Constants.h"
37 #include "llvm/IR/DebugInfo.h"
38 #include "llvm/IR/DerivedTypes.h"
39 #include "llvm/IR/Mangler.h"
40 #include "llvm/IR/Module.h"
41 #include "llvm/MC/MCAsmInfo.h"
42 #include "llvm/MC/MCContext.h"
43 #include "llvm/MC/MCExpr.h"
44 #include "llvm/MC/MCInst.h"
45 #include "llvm/MC/MCInstBuilder.h"
46 #include "llvm/MC/MCSectionELF.h"
47 #include "llvm/MC/MCSectionMachO.h"
48 #include "llvm/MC/MCStreamer.h"
49 #include "llvm/MC/MCSymbol.h"
50 #include "llvm/Support/CommandLine.h"
51 #include "llvm/Support/Debug.h"
52 #include "llvm/Support/ELF.h"
53 #include "llvm/Support/ErrorHandling.h"
54 #include "llvm/Support/MathExtras.h"
55 #include "llvm/Support/TargetRegistry.h"
56 #include "llvm/Support/raw_ostream.h"
57 #include "llvm/Target/TargetInstrInfo.h"
58 #include "llvm/Target/TargetOptions.h"
59 #include "llvm/Target/TargetRegisterInfo.h"
63 class PPCAsmPrinter : public AsmPrinter {
65 MapVector<MCSymbol*, MCSymbol*> TOC;
66 const PPCSubtarget &Subtarget;
69 explicit PPCAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
70 : AsmPrinter(TM, Streamer),
71 Subtarget(TM.getSubtarget<PPCSubtarget>()), TOCLabelID(0) {}
73 virtual const char *getPassName() const {
74 return "PowerPC Assembly Printer";
77 MCSymbol *lookUpOrCreateTOCEntry(MCSymbol *Sym);
79 virtual void EmitInstruction(const MachineInstr *MI);
81 void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);
83 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
84 unsigned AsmVariant, const char *ExtraCode,
86 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
87 unsigned AsmVariant, const char *ExtraCode,
91 /// PPCLinuxAsmPrinter - PowerPC assembly printer, customized for Linux
92 class PPCLinuxAsmPrinter : public PPCAsmPrinter {
94 explicit PPCLinuxAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
95 : PPCAsmPrinter(TM, Streamer) {}
97 virtual const char *getPassName() const {
98 return "Linux PPC Assembly Printer";
101 bool doFinalization(Module &M);
103 virtual void EmitFunctionEntryLabel();
105 void EmitFunctionBodyEnd();
108 /// PPCDarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac
110 class PPCDarwinAsmPrinter : public PPCAsmPrinter {
112 explicit PPCDarwinAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
113 : PPCAsmPrinter(TM, Streamer) {}
115 virtual const char *getPassName() const {
116 return "Darwin PPC Assembly Printer";
119 bool doFinalization(Module &M);
120 void EmitStartOfAsmFile(Module &M);
122 void EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs);
124 } // end of anonymous namespace
126 /// stripRegisterPrefix - This method strips the character prefix from a
127 /// register name so that only the number is left. Used by for linux asm.
128 static const char *stripRegisterPrefix(const char *RegName) {
129 switch (RegName[0]) {
133 if (RegName[1] == 's')
136 case 'c': if (RegName[1] == 'r') return RegName + 2;
142 void PPCAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
144 const DataLayout *DL = TM.getDataLayout();
145 const MachineOperand &MO = MI->getOperand(OpNo);
147 switch (MO.getType()) {
148 case MachineOperand::MO_Register: {
149 const char *RegName = PPCInstPrinter::getRegisterName(MO.getReg());
150 // Linux assembler (Others?) does not take register mnemonics.
151 // FIXME - What about special registers used in mfspr/mtspr?
152 if (!Subtarget.isDarwin()) RegName = stripRegisterPrefix(RegName);
156 case MachineOperand::MO_Immediate:
160 case MachineOperand::MO_MachineBasicBlock:
161 O << *MO.getMBB()->getSymbol();
163 case MachineOperand::MO_ConstantPoolIndex:
164 O << DL->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
165 << '_' << MO.getIndex();
167 case MachineOperand::MO_BlockAddress:
168 O << *GetBlockAddressSymbol(MO.getBlockAddress());
170 case MachineOperand::MO_GlobalAddress: {
171 // Computing the address of a global symbol, not calling it.
172 const GlobalValue *GV = MO.getGlobal();
173 MCSymbol *SymToPrint;
175 // External or weakly linked global variables need non-lazily-resolved stubs
176 if (TM.getRelocationModel() != Reloc::Static &&
177 (GV->isDeclaration() || GV->isWeakForLinker())) {
178 if (!GV->hasHiddenVisibility()) {
179 SymToPrint = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
180 MachineModuleInfoImpl::StubValueTy &StubSym =
181 MMI->getObjFileInfo<MachineModuleInfoMachO>()
182 .getGVStubEntry(SymToPrint);
183 if (StubSym.getPointer() == 0)
184 StubSym = MachineModuleInfoImpl::
185 StubValueTy(getSymbol(GV), !GV->hasInternalLinkage());
186 } else if (GV->isDeclaration() || GV->hasCommonLinkage() ||
187 GV->hasAvailableExternallyLinkage()) {
188 SymToPrint = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
190 MachineModuleInfoImpl::StubValueTy &StubSym =
191 MMI->getObjFileInfo<MachineModuleInfoMachO>().
192 getHiddenGVStubEntry(SymToPrint);
193 if (StubSym.getPointer() == 0)
194 StubSym = MachineModuleInfoImpl::
195 StubValueTy(getSymbol(GV), !GV->hasInternalLinkage());
197 SymToPrint = getSymbol(GV);
200 SymToPrint = getSymbol(GV);
205 printOffset(MO.getOffset(), O);
210 O << "<unknown operand type: " << MO.getType() << ">";
215 /// PrintAsmOperand - Print out an operand for an inline asm expression.
217 bool PPCAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
219 const char *ExtraCode, raw_ostream &O) {
220 // Does this asm operand have a single letter operand modifier?
221 if (ExtraCode && ExtraCode[0]) {
222 if (ExtraCode[1] != 0) return true; // Unknown modifier.
224 switch (ExtraCode[0]) {
226 // See if this is a generic print operand
227 return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
228 case 'c': // Don't print "$" before a global var name or constant.
229 break; // PPC never has a prefix.
230 case 'L': // Write second word of DImode reference.
231 // Verify that this operand has two consecutive registers.
232 if (!MI->getOperand(OpNo).isReg() ||
233 OpNo+1 == MI->getNumOperands() ||
234 !MI->getOperand(OpNo+1).isReg())
236 ++OpNo; // Return the high-part.
239 // Write 'i' if an integer constant, otherwise nothing. Used to print
241 if (MI->getOperand(OpNo).isImm())
247 printOperand(MI, OpNo, O);
251 // At the moment, all inline asm memory operands are a single register.
252 // In any case, the output of this routine should always be just one
253 // assembler operand.
255 bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
257 const char *ExtraCode,
259 if (ExtraCode && ExtraCode[0]) {
260 if (ExtraCode[1] != 0) return true; // Unknown modifier.
262 switch (ExtraCode[0]) {
263 default: return true; // Unknown modifier.
264 case 'y': // A memory reference for an X-form instruction
266 const char *RegName = "r0";
267 if (!Subtarget.isDarwin()) RegName = stripRegisterPrefix(RegName);
268 O << RegName << ", ";
269 printOperand(MI, OpNo, O);
275 assert(MI->getOperand(OpNo).isReg());
277 printOperand(MI, OpNo, O);
283 /// lookUpOrCreateTOCEntry -- Given a symbol, look up whether a TOC entry
284 /// exists for it. If not, create one. Then return a symbol that references
286 MCSymbol *PPCAsmPrinter::lookUpOrCreateTOCEntry(MCSymbol *Sym) {
287 const DataLayout *DL = TM.getDataLayout();
288 MCSymbol *&TOCEntry = TOC[Sym];
290 // To avoid name clash check if the name already exists.
291 while (TOCEntry == 0) {
292 if (OutContext.LookupSymbol(Twine(DL->getPrivateGlobalPrefix()) +
293 "C" + Twine(TOCLabelID++)) == 0) {
294 TOCEntry = GetTempSymbol("C", TOCLabelID);
302 /// EmitInstruction -- Print out a single PowerPC MI in Darwin syntax to
303 /// the current output stream.
305 void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
307 bool isPPC64 = Subtarget.isPPC64();
309 // Lower multi-instruction pseudo operations.
310 switch (MI->getOpcode()) {
312 case TargetOpcode::DBG_VALUE:
313 llvm_unreachable("Should be handled target independently");
314 case PPC::MovePCtoLR:
315 case PPC::MovePCtoLR8: {
316 // Transform %LR = MovePCtoLR
317 // Into this, where the label is the PIC base:
320 MCSymbol *PICBase = MF->getPICBaseSymbol();
323 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL)
324 // FIXME: We would like an efficient form for this, so we don't have to do
325 // a lot of extra uniquing.
326 .addExpr(MCSymbolRefExpr::Create(PICBase, OutContext)));
329 OutStreamer.EmitLabel(PICBase);
335 // Transform %X3 = LDtoc <ga:@min1>, %X2
336 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
338 // Change the opcode to LD, and the global address operand to be a
339 // reference to the TOC entry we will synthesize later.
340 TmpInst.setOpcode(PPC::LD);
341 const MachineOperand &MO = MI->getOperand(1);
343 // Map symbol -> label of TOC entry
344 assert(MO.isGlobal() || MO.isCPI() || MO.isJTI());
345 MCSymbol *MOSymbol = 0;
347 MOSymbol = getSymbol(MO.getGlobal());
349 MOSymbol = GetCPISymbol(MO.getIndex());
351 MOSymbol = GetJTISymbol(MO.getIndex());
353 MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
356 MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_PPC_TOC,
358 TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
359 EmitToStreamer(OutStreamer, TmpInst);
363 case PPC::ADDIStocHA: {
364 // Transform %Xd = ADDIStocHA %X2, <ga:@sym>
365 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
367 // Change the opcode to ADDIS8. If the global address is external,
368 // has common linkage, is a function address, or is a jump table
369 // address, then generate a TOC entry and reference that. Otherwise
370 // reference the symbol directly.
371 TmpInst.setOpcode(PPC::ADDIS8);
372 const MachineOperand &MO = MI->getOperand(2);
373 assert((MO.isGlobal() || MO.isCPI() || MO.isJTI()) &&
374 "Invalid operand for ADDIStocHA!");
375 MCSymbol *MOSymbol = 0;
376 bool IsExternal = false;
377 bool IsFunction = false;
378 bool IsCommon = false;
379 bool IsAvailExt = false;
382 const GlobalValue *GValue = MO.getGlobal();
383 const GlobalAlias *GAlias = dyn_cast<GlobalAlias>(GValue);
384 const GlobalValue *RealGValue =
385 GAlias ? GAlias->getAliasedGlobal() : GValue;
386 MOSymbol = getSymbol(RealGValue);
387 const GlobalVariable *GVar = dyn_cast<GlobalVariable>(RealGValue);
388 IsExternal = GVar && !GVar->hasInitializer();
389 IsCommon = GVar && RealGValue->hasCommonLinkage();
391 IsAvailExt = GVar && RealGValue->hasAvailableExternallyLinkage();
392 } else if (MO.isCPI())
393 MOSymbol = GetCPISymbol(MO.getIndex());
395 MOSymbol = GetJTISymbol(MO.getIndex());
397 if (IsExternal || IsFunction || IsCommon || IsAvailExt || MO.isJTI() ||
398 TM.getCodeModel() == CodeModel::Large)
399 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
402 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_HA,
404 TmpInst.getOperand(2) = MCOperand::CreateExpr(Exp);
405 EmitToStreamer(OutStreamer, TmpInst);
409 // Transform %Xd = LDtocL <ga:@sym>, %Xs
410 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
412 // Change the opcode to LD. If the global address is external, has
413 // common linkage, or is a jump table address, then reference the
414 // associated TOC entry. Otherwise reference the symbol directly.
415 TmpInst.setOpcode(PPC::LD);
416 const MachineOperand &MO = MI->getOperand(1);
417 assert((MO.isGlobal() || MO.isJTI() || MO.isCPI()) &&
418 "Invalid operand for LDtocL!");
419 MCSymbol *MOSymbol = 0;
422 MOSymbol = lookUpOrCreateTOCEntry(GetJTISymbol(MO.getIndex()));
423 else if (MO.isCPI()) {
424 MOSymbol = GetCPISymbol(MO.getIndex());
425 if (TM.getCodeModel() == CodeModel::Large)
426 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
428 else if (MO.isGlobal()) {
429 const GlobalValue *GValue = MO.getGlobal();
430 const GlobalAlias *GAlias = dyn_cast<GlobalAlias>(GValue);
431 const GlobalValue *RealGValue =
432 GAlias ? GAlias->getAliasedGlobal() : GValue;
433 MOSymbol = getSymbol(RealGValue);
434 const GlobalVariable *GVar = dyn_cast<GlobalVariable>(RealGValue);
436 if (!GVar || !GVar->hasInitializer() || RealGValue->hasCommonLinkage() ||
437 RealGValue->hasAvailableExternallyLinkage() ||
438 TM.getCodeModel() == CodeModel::Large)
439 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
443 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_LO,
445 TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
446 EmitToStreamer(OutStreamer, TmpInst);
449 case PPC::ADDItocL: {
450 // Transform %Xd = ADDItocL %Xs, <ga:@sym>
451 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
453 // Change the opcode to ADDI8. If the global address is external, then
454 // generate a TOC entry and reference that. Otherwise reference the
456 TmpInst.setOpcode(PPC::ADDI8);
457 const MachineOperand &MO = MI->getOperand(2);
458 assert((MO.isGlobal() || MO.isCPI()) && "Invalid operand for ADDItocL");
459 MCSymbol *MOSymbol = 0;
460 bool IsExternal = false;
461 bool IsFunction = false;
464 const GlobalValue *GValue = MO.getGlobal();
465 const GlobalAlias *GAlias = dyn_cast<GlobalAlias>(GValue);
466 const GlobalValue *RealGValue =
467 GAlias ? GAlias->getAliasedGlobal() : GValue;
468 MOSymbol = getSymbol(RealGValue);
469 const GlobalVariable *GVar = dyn_cast<GlobalVariable>(RealGValue);
470 IsExternal = GVar && !GVar->hasInitializer();
472 } else if (MO.isCPI())
473 MOSymbol = GetCPISymbol(MO.getIndex());
475 if (IsFunction || IsExternal || TM.getCodeModel() == CodeModel::Large)
476 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
479 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_LO,
481 TmpInst.getOperand(2) = MCOperand::CreateExpr(Exp);
482 EmitToStreamer(OutStreamer, TmpInst);
485 case PPC::ADDISgotTprelHA: {
486 // Transform: %Xd = ADDISgotTprelHA %X2, <ga:@sym>
487 // Into: %Xd = ADDIS8 %X2, sym@got@tlsgd@ha
488 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
489 const MachineOperand &MO = MI->getOperand(2);
490 const GlobalValue *GValue = MO.getGlobal();
491 MCSymbol *MOSymbol = getSymbol(GValue);
492 const MCExpr *SymGotTprel =
493 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA,
495 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
496 .addReg(MI->getOperand(0).getReg())
498 .addExpr(SymGotTprel));
501 case PPC::LDgotTprelL:
502 case PPC::LDgotTprelL32: {
503 // Transform %Xd = LDgotTprelL <ga:@sym>, %Xs
504 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
506 // Change the opcode to LD.
507 TmpInst.setOpcode(isPPC64 ? PPC::LD : PPC::LWZ);
508 const MachineOperand &MO = MI->getOperand(1);
509 const GlobalValue *GValue = MO.getGlobal();
510 MCSymbol *MOSymbol = getSymbol(GValue);
512 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO,
514 TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
515 EmitToStreamer(OutStreamer, TmpInst);
519 case PPC::PPC32GOT: {
520 MCSymbol *GOTSymbol = OutContext.GetOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
521 const MCExpr *SymGotTlsL =
522 MCSymbolRefExpr::Create(GOTSymbol, MCSymbolRefExpr::VK_PPC_LO,
524 const MCExpr *SymGotTlsHA =
525 MCSymbolRefExpr::Create(GOTSymbol, MCSymbolRefExpr::VK_PPC_HA,
527 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LI)
528 .addReg(MI->getOperand(0).getReg())
529 .addExpr(SymGotTlsL));
530 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS)
531 .addReg(MI->getOperand(0).getReg())
532 .addReg(MI->getOperand(0).getReg())
533 .addExpr(SymGotTlsHA));
536 case PPC::ADDIStlsgdHA: {
537 // Transform: %Xd = ADDIStlsgdHA %X2, <ga:@sym>
538 // Into: %Xd = ADDIS8 %X2, sym@got@tlsgd@ha
539 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
540 const MachineOperand &MO = MI->getOperand(2);
541 const GlobalValue *GValue = MO.getGlobal();
542 MCSymbol *MOSymbol = getSymbol(GValue);
543 const MCExpr *SymGotTlsGD =
544 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA,
546 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
547 .addReg(MI->getOperand(0).getReg())
549 .addExpr(SymGotTlsGD));
552 case PPC::ADDItlsgdL: {
553 // Transform: %Xd = ADDItlsgdL %Xs, <ga:@sym>
554 // Into: %Xd = ADDI8 %Xs, sym@got@tlsgd@l
555 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
556 const MachineOperand &MO = MI->getOperand(2);
557 const GlobalValue *GValue = MO.getGlobal();
558 MCSymbol *MOSymbol = getSymbol(GValue);
559 const MCExpr *SymGotTlsGD =
560 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO,
562 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI8)
563 .addReg(MI->getOperand(0).getReg())
564 .addReg(MI->getOperand(1).getReg())
565 .addExpr(SymGotTlsGD));
568 case PPC::GETtlsADDR: {
569 // Transform: %X3 = GETtlsADDR %X3, <ga:@sym>
570 // Into: BL8_NOP_TLS __tls_get_addr(sym@tlsgd)
571 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
573 StringRef Name = "__tls_get_addr";
574 MCSymbol *TlsGetAddr = OutContext.GetOrCreateSymbol(Name);
575 const MCSymbolRefExpr *TlsRef =
576 MCSymbolRefExpr::Create(TlsGetAddr, MCSymbolRefExpr::VK_None, OutContext);
577 const MachineOperand &MO = MI->getOperand(2);
578 const GlobalValue *GValue = MO.getGlobal();
579 MCSymbol *MOSymbol = getSymbol(GValue);
580 const MCExpr *SymVar =
581 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TLSGD,
583 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL8_NOP_TLS)
588 case PPC::ADDIStlsldHA: {
589 // Transform: %Xd = ADDIStlsldHA %X2, <ga:@sym>
590 // Into: %Xd = ADDIS8 %X2, sym@got@tlsld@ha
591 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
592 const MachineOperand &MO = MI->getOperand(2);
593 const GlobalValue *GValue = MO.getGlobal();
594 MCSymbol *MOSymbol = getSymbol(GValue);
595 const MCExpr *SymGotTlsLD =
596 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA,
598 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
599 .addReg(MI->getOperand(0).getReg())
601 .addExpr(SymGotTlsLD));
604 case PPC::ADDItlsldL: {
605 // Transform: %Xd = ADDItlsldL %Xs, <ga:@sym>
606 // Into: %Xd = ADDI8 %Xs, sym@got@tlsld@l
607 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
608 const MachineOperand &MO = MI->getOperand(2);
609 const GlobalValue *GValue = MO.getGlobal();
610 MCSymbol *MOSymbol = getSymbol(GValue);
611 const MCExpr *SymGotTlsLD =
612 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO,
614 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI8)
615 .addReg(MI->getOperand(0).getReg())
616 .addReg(MI->getOperand(1).getReg())
617 .addExpr(SymGotTlsLD));
620 case PPC::GETtlsldADDR: {
621 // Transform: %X3 = GETtlsldADDR %X3, <ga:@sym>
622 // Into: BL8_NOP_TLS __tls_get_addr(sym@tlsld)
623 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
625 StringRef Name = "__tls_get_addr";
626 MCSymbol *TlsGetAddr = OutContext.GetOrCreateSymbol(Name);
627 const MCSymbolRefExpr *TlsRef =
628 MCSymbolRefExpr::Create(TlsGetAddr, MCSymbolRefExpr::VK_None, OutContext);
629 const MachineOperand &MO = MI->getOperand(2);
630 const GlobalValue *GValue = MO.getGlobal();
631 MCSymbol *MOSymbol = getSymbol(GValue);
632 const MCExpr *SymVar =
633 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TLSLD,
635 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL8_NOP_TLS)
640 case PPC::ADDISdtprelHA: {
641 // Transform: %Xd = ADDISdtprelHA %X3, <ga:@sym>
642 // Into: %Xd = ADDIS8 %X3, sym@dtprel@ha
643 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
644 const MachineOperand &MO = MI->getOperand(2);
645 const GlobalValue *GValue = MO.getGlobal();
646 MCSymbol *MOSymbol = getSymbol(GValue);
647 const MCExpr *SymDtprel =
648 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL_HA,
650 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
651 .addReg(MI->getOperand(0).getReg())
653 .addExpr(SymDtprel));
656 case PPC::ADDIdtprelL: {
657 // Transform: %Xd = ADDIdtprelL %Xs, <ga:@sym>
658 // Into: %Xd = ADDI8 %Xs, sym@dtprel@l
659 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
660 const MachineOperand &MO = MI->getOperand(2);
661 const GlobalValue *GValue = MO.getGlobal();
662 MCSymbol *MOSymbol = getSymbol(GValue);
663 const MCExpr *SymDtprel =
664 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL_LO,
666 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI8)
667 .addReg(MI->getOperand(0).getReg())
668 .addReg(MI->getOperand(1).getReg())
669 .addExpr(SymDtprel));
674 if (!Subtarget.hasMFOCRF()) {
675 // Transform: %R3 = MFOCRF %CR7
676 // Into: %R3 = MFCR ;; cr7
678 MI->getOpcode() == PPC::MFOCRF ? PPC::MFCR : PPC::MFCR8;
679 OutStreamer.AddComment(PPCInstPrinter::
680 getRegisterName(MI->getOperand(1).getReg()));
681 EmitToStreamer(OutStreamer, MCInstBuilder(NewOpcode)
682 .addReg(MI->getOperand(0).getReg()));
688 if (!Subtarget.hasMFOCRF()) {
689 // Transform: %CR7 = MTOCRF %R3
690 // Into: MTCRF mask, %R3 ;; cr7
692 MI->getOpcode() == PPC::MTOCRF ? PPC::MTCRF : PPC::MTCRF8;
693 unsigned Mask = 0x80 >> OutContext.getRegisterInfo()
694 ->getEncodingValue(MI->getOperand(0).getReg());
695 OutStreamer.AddComment(PPCInstPrinter::
696 getRegisterName(MI->getOperand(0).getReg()));
697 EmitToStreamer(OutStreamer, MCInstBuilder(NewOpcode)
699 .addReg(MI->getOperand(1).getReg()));
707 // Verify alignment is legal, so we don't create relocations
708 // that can't be supported.
709 // FIXME: This test is currently disabled for Darwin. The test
710 // suite shows a handful of test cases that fail this check for
711 // Darwin. Those need to be investigated before this sanity test
712 // can be enabled for those subtargets.
713 if (!Subtarget.isDarwin()) {
714 unsigned OpNum = (MI->getOpcode() == PPC::STD) ? 2 : 1;
715 const MachineOperand &MO = MI->getOperand(OpNum);
716 if (MO.isGlobal() && MO.getGlobal()->getAlignment() < 4)
717 llvm_unreachable("Global must be word-aligned for LD, STD, LWA!");
719 // Now process the instruction normally.
724 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, Subtarget.isDarwin());
725 EmitToStreamer(OutStreamer, TmpInst);
728 void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
729 if (!Subtarget.isPPC64()) // linux/ppc32 - Normal entry label.
730 return AsmPrinter::EmitFunctionEntryLabel();
732 // Emit an official procedure descriptor.
733 MCSectionSubPair Current = OutStreamer.getCurrentSection();
734 const MCSectionELF *Section = OutStreamer.getContext().getELFSection(".opd",
735 ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
736 SectionKind::getReadOnly());
737 OutStreamer.SwitchSection(Section);
738 OutStreamer.EmitLabel(CurrentFnSym);
739 OutStreamer.EmitValueToAlignment(8);
741 OutContext.GetOrCreateSymbol(".L." + Twine(CurrentFnSym->getName()));
742 // Generates a R_PPC64_ADDR64 (from FK_DATA_8) relocation for the function
744 OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol1, OutContext),
746 MCSymbol *Symbol2 = OutContext.GetOrCreateSymbol(StringRef(".TOC."));
747 // Generates a R_PPC64_TOC relocation for TOC base insertion.
748 OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol2,
749 MCSymbolRefExpr::VK_PPC_TOCBASE, OutContext),
751 // Emit a null environment pointer.
752 OutStreamer.EmitIntValue(0, 8 /* size */);
753 OutStreamer.SwitchSection(Current.first, Current.second);
755 MCSymbol *RealFnSym = OutContext.GetOrCreateSymbol(
756 ".L." + Twine(CurrentFnSym->getName()));
757 OutStreamer.EmitLabel(RealFnSym);
758 CurrentFnSymForSize = RealFnSym;
762 bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
763 const DataLayout *TD = TM.getDataLayout();
765 bool isPPC64 = TD->getPointerSizeInBits() == 64;
767 PPCTargetStreamer &TS =
768 static_cast<PPCTargetStreamer &>(*OutStreamer.getTargetStreamer());
770 if (isPPC64 && !TOC.empty()) {
771 const MCSectionELF *Section = OutStreamer.getContext().getELFSection(".toc",
772 ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
773 SectionKind::getReadOnly());
774 OutStreamer.SwitchSection(Section);
776 for (MapVector<MCSymbol*, MCSymbol*>::iterator I = TOC.begin(),
777 E = TOC.end(); I != E; ++I) {
778 OutStreamer.EmitLabel(I->second);
779 MCSymbol *S = OutContext.GetOrCreateSymbol(I->first->getName());
784 MachineModuleInfoELF &MMIELF =
785 MMI->getObjFileInfo<MachineModuleInfoELF>();
787 MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
788 if (!Stubs.empty()) {
789 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
790 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
792 OutStreamer.EmitLabel(Stubs[i].first);
794 OutStreamer.EmitValue(MCSymbolRefExpr::Create(Stubs[i].second.getPointer(),
796 isPPC64 ? 8 : 4/*size*/);
800 OutStreamer.AddBlankLine();
803 return AsmPrinter::doFinalization(M);
806 /// EmitFunctionBodyEnd - Print the traceback table before the .size
809 void PPCLinuxAsmPrinter::EmitFunctionBodyEnd() {
810 // Only the 64-bit target requires a traceback table. For now,
811 // we only emit the word of zeroes that GDB requires to find
812 // the end of the function, and zeroes for the eight-byte
814 // FIXME: We should fill in the eight-byte mandatory fields as described in
815 // the PPC64 ELF ABI (this is a low-priority item because GDB does not
816 // currently make use of these fields).
817 if (Subtarget.isPPC64()) {
818 OutStreamer.EmitIntValue(0, 4/*size*/);
819 OutStreamer.EmitIntValue(0, 8/*size*/);
823 void PPCDarwinAsmPrinter::EmitStartOfAsmFile(Module &M) {
824 static const char *const CPUDirectives[] = {
848 unsigned Directive = Subtarget.getDarwinDirective();
849 if (Subtarget.hasMFOCRF() && Directive < PPC::DIR_970)
850 Directive = PPC::DIR_970;
851 if (Subtarget.hasAltivec() && Directive < PPC::DIR_7400)
852 Directive = PPC::DIR_7400;
853 if (Subtarget.isPPC64() && Directive < PPC::DIR_64)
854 Directive = PPC::DIR_64;
855 assert(Directive <= PPC::DIR_64 && "Directive out of range.");
857 assert(Directive < array_lengthof(CPUDirectives) &&
858 "CPUDirectives[] might not be up-to-date!");
859 PPCTargetStreamer &TStreamer =
860 *static_cast<PPCTargetStreamer *>(OutStreamer.getTargetStreamer());
861 TStreamer.emitMachine(CPUDirectives[Directive]);
863 // Prime text sections so they are adjacent. This reduces the likelihood a
864 // large data or debug section causes a branch to exceed 16M limit.
865 const TargetLoweringObjectFileMachO &TLOFMacho =
866 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
867 OutStreamer.SwitchSection(TLOFMacho.getTextCoalSection());
868 if (TM.getRelocationModel() == Reloc::PIC_) {
869 OutStreamer.SwitchSection(
870 OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
871 MachO::S_SYMBOL_STUBS |
872 MachO::S_ATTR_PURE_INSTRUCTIONS,
873 32, SectionKind::getText()));
874 } else if (TM.getRelocationModel() == Reloc::DynamicNoPIC) {
875 OutStreamer.SwitchSection(
876 OutContext.getMachOSection("__TEXT","__symbol_stub1",
877 MachO::S_SYMBOL_STUBS |
878 MachO::S_ATTR_PURE_INSTRUCTIONS,
879 16, SectionKind::getText()));
881 OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
884 static MCSymbol *GetLazyPtr(MCSymbol *Sym, MCContext &Ctx) {
885 // Remove $stub suffix, add $lazy_ptr.
886 StringRef NoStub = Sym->getName().substr(0, Sym->getName().size()-5);
887 return Ctx.GetOrCreateSymbol(NoStub + "$lazy_ptr");
890 static MCSymbol *GetAnonSym(MCSymbol *Sym, MCContext &Ctx) {
891 // Add $tmp suffix to $stub, yielding $stub$tmp.
892 return Ctx.GetOrCreateSymbol(Sym->getName() + "$tmp");
895 void PPCDarwinAsmPrinter::
896 EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs) {
897 bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
898 bool isDarwin = Subtarget.isDarwin();
900 const TargetLoweringObjectFileMachO &TLOFMacho =
901 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
903 // .lazy_symbol_pointer
904 const MCSection *LSPSection = TLOFMacho.getLazySymbolPointerSection();
906 // Output stubs for dynamically-linked functions
907 if (TM.getRelocationModel() == Reloc::PIC_) {
908 const MCSection *StubSection =
909 OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
910 MachO::S_SYMBOL_STUBS |
911 MachO::S_ATTR_PURE_INSTRUCTIONS,
912 32, SectionKind::getText());
913 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
914 OutStreamer.SwitchSection(StubSection);
917 MCSymbol *Stub = Stubs[i].first;
918 MCSymbol *RawSym = Stubs[i].second.getPointer();
919 MCSymbol *LazyPtr = GetLazyPtr(Stub, OutContext);
920 MCSymbol *AnonSymbol = GetAnonSym(Stub, OutContext);
922 OutStreamer.EmitLabel(Stub);
923 OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
925 const MCExpr *Anon = MCSymbolRefExpr::Create(AnonSymbol, OutContext);
926 const MCExpr *LazyPtrExpr = MCSymbolRefExpr::Create(LazyPtr, OutContext);
928 MCBinaryExpr::CreateSub(LazyPtrExpr, Anon, OutContext);
931 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MFLR).addReg(PPC::R0));
932 // bcl 20, 31, AnonSymbol
933 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCLalways).addExpr(Anon));
934 OutStreamer.EmitLabel(AnonSymbol);
936 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MFLR).addReg(PPC::R11));
937 // addis r11, r11, ha16(LazyPtr - AnonSymbol)
938 const MCExpr *SubHa16 = PPCMCExpr::CreateHa(Sub, isDarwin, OutContext);
939 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS)
944 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTLR).addReg(PPC::R0));
946 // ldu r12, lo16(LazyPtr - AnonSymbol)(r11)
947 // lwzu r12, lo16(LazyPtr - AnonSymbol)(r11)
948 const MCExpr *SubLo16 = PPCMCExpr::CreateLo(Sub, isDarwin, OutContext);
949 EmitToStreamer(OutStreamer, MCInstBuilder(isPPC64 ? PPC::LDU : PPC::LWZU)
951 .addExpr(SubLo16).addExpr(SubLo16)
954 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTCTR).addReg(PPC::R12));
956 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCTR));
958 OutStreamer.SwitchSection(LSPSection);
959 OutStreamer.EmitLabel(LazyPtr);
960 OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
962 MCSymbol *DyldStubBindingHelper =
963 OutContext.GetOrCreateSymbol(StringRef("dyld_stub_binding_helper"));
965 // .quad dyld_stub_binding_helper
966 OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 8);
968 // .long dyld_stub_binding_helper
969 OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 4);
972 OutStreamer.AddBlankLine();
976 const MCSection *StubSection =
977 OutContext.getMachOSection("__TEXT","__symbol_stub1",
978 MachO::S_SYMBOL_STUBS |
979 MachO::S_ATTR_PURE_INSTRUCTIONS,
980 16, SectionKind::getText());
981 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
982 MCSymbol *Stub = Stubs[i].first;
983 MCSymbol *RawSym = Stubs[i].second.getPointer();
984 MCSymbol *LazyPtr = GetLazyPtr(Stub, OutContext);
985 const MCExpr *LazyPtrExpr = MCSymbolRefExpr::Create(LazyPtr, OutContext);
987 OutStreamer.SwitchSection(StubSection);
989 OutStreamer.EmitLabel(Stub);
990 OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
992 // lis r11, ha16(LazyPtr)
993 const MCExpr *LazyPtrHa16 =
994 PPCMCExpr::CreateHa(LazyPtrExpr, isDarwin, OutContext);
995 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LIS)
997 .addExpr(LazyPtrHa16));
999 // ldu r12, lo16(LazyPtr)(r11)
1000 // lwzu r12, lo16(LazyPtr)(r11)
1001 const MCExpr *LazyPtrLo16 =
1002 PPCMCExpr::CreateLo(LazyPtrExpr, isDarwin, OutContext);
1003 EmitToStreamer(OutStreamer, MCInstBuilder(isPPC64 ? PPC::LDU : PPC::LWZU)
1005 .addExpr(LazyPtrLo16).addExpr(LazyPtrLo16)
1009 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTCTR).addReg(PPC::R12));
1011 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCTR));
1013 OutStreamer.SwitchSection(LSPSection);
1014 OutStreamer.EmitLabel(LazyPtr);
1015 OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
1017 MCSymbol *DyldStubBindingHelper =
1018 OutContext.GetOrCreateSymbol(StringRef("dyld_stub_binding_helper"));
1020 // .quad dyld_stub_binding_helper
1021 OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 8);
1023 // .long dyld_stub_binding_helper
1024 OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 4);
1028 OutStreamer.AddBlankLine();
1032 bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
1033 bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
1035 // Darwin/PPC always uses mach-o.
1036 const TargetLoweringObjectFileMachO &TLOFMacho =
1037 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
1038 MachineModuleInfoMachO &MMIMacho =
1039 MMI->getObjFileInfo<MachineModuleInfoMachO>();
1041 MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetFnStubList();
1043 EmitFunctionStubs(Stubs);
1045 if (MAI->doesSupportExceptionHandling() && MMI) {
1046 // Add the (possibly multiple) personalities to the set of global values.
1047 // Only referenced functions get into the Personalities list.
1048 const std::vector<const Function*> &Personalities = MMI->getPersonalities();
1049 for (std::vector<const Function*>::const_iterator I = Personalities.begin(),
1050 E = Personalities.end(); I != E; ++I) {
1052 MCSymbol *NLPSym = getSymbolWithGlobalValueBase(*I, "$non_lazy_ptr");
1053 MachineModuleInfoImpl::StubValueTy &StubSym =
1054 MMIMacho.getGVStubEntry(NLPSym);
1055 StubSym = MachineModuleInfoImpl::StubValueTy(getSymbol(*I), true);
1060 // Output stubs for dynamically-linked functions.
1061 Stubs = MMIMacho.GetGVStubList();
1063 // Output macho stubs for external and common global variables.
1064 if (!Stubs.empty()) {
1065 // Switch with ".non_lazy_symbol_pointer" directive.
1066 OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
1067 EmitAlignment(isPPC64 ? 3 : 2);
1069 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
1071 OutStreamer.EmitLabel(Stubs[i].first);
1072 // .indirect_symbol _foo
1073 MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
1074 OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol);
1077 // External to current translation unit.
1078 OutStreamer.EmitIntValue(0, isPPC64 ? 8 : 4/*size*/);
1080 // Internal to current translation unit.
1082 // When we place the LSDA into the TEXT section, the type info pointers
1083 // need to be indirect and pc-rel. We accomplish this by using NLPs.
1084 // However, sometimes the types are local to the file. So we need to
1085 // fill in the value for the NLP in those cases.
1086 OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
1088 isPPC64 ? 8 : 4/*size*/);
1092 OutStreamer.AddBlankLine();
1095 Stubs = MMIMacho.GetHiddenGVStubList();
1096 if (!Stubs.empty()) {
1097 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
1098 EmitAlignment(isPPC64 ? 3 : 2);
1100 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
1102 OutStreamer.EmitLabel(Stubs[i].first);
1104 OutStreamer.EmitValue(MCSymbolRefExpr::
1105 Create(Stubs[i].second.getPointer(),
1107 isPPC64 ? 8 : 4/*size*/);
1111 OutStreamer.AddBlankLine();
1114 // Funny Darwin hack: This flag tells the linker that no global symbols
1115 // contain code that falls through to other global symbols (e.g. the obvious
1116 // implementation of multiple entry points). If this doesn't occur, the
1117 // linker can safely perform dead code stripping. Since LLVM never generates
1118 // code that does this, it is always safe to set.
1119 OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
1121 return AsmPrinter::doFinalization(M);
1124 /// createPPCAsmPrinterPass - Returns a pass that prints the PPC assembly code
1125 /// for a MachineFunction to the given output stream, in a format that the
1126 /// Darwin assembler can deal with.
1128 static AsmPrinter *createPPCAsmPrinterPass(TargetMachine &tm,
1129 MCStreamer &Streamer) {
1130 const PPCSubtarget *Subtarget = &tm.getSubtarget<PPCSubtarget>();
1132 if (Subtarget->isDarwin())
1133 return new PPCDarwinAsmPrinter(tm, Streamer);
1134 return new PPCLinuxAsmPrinter(tm, Streamer);
1137 // Force static initialization.
1138 extern "C" void LLVMInitializePowerPCAsmPrinter() {
1139 TargetRegistry::RegisterAsmPrinter(ThePPC32Target, createPPCAsmPrinterPass);
1140 TargetRegistry::RegisterAsmPrinter(ThePPC64Target, createPPCAsmPrinterPass);
1141 TargetRegistry::RegisterAsmPrinter(ThePPC64LETarget, createPPCAsmPrinterPass);