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 //===----------------------------------------------------------------------===//
20 #include "InstPrinter/PPCInstPrinter.h"
21 #include "PPCMachineFunctionInfo.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/MachineConstantPool.h"
32 #include "llvm/CodeGen/MachineFunctionPass.h"
33 #include "llvm/CodeGen/MachineInstr.h"
34 #include "llvm/CodeGen/MachineInstrBuilder.h"
35 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
36 #include "llvm/CodeGen/MachineRegisterInfo.h"
37 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
38 #include "llvm/IR/Constants.h"
39 #include "llvm/IR/DebugInfo.h"
40 #include "llvm/IR/DerivedTypes.h"
41 #include "llvm/IR/Mangler.h"
42 #include "llvm/IR/Module.h"
43 #include "llvm/MC/MCAsmInfo.h"
44 #include "llvm/MC/MCContext.h"
45 #include "llvm/MC/MCExpr.h"
46 #include "llvm/MC/MCInst.h"
47 #include "llvm/MC/MCInstBuilder.h"
48 #include "llvm/MC/MCSectionELF.h"
49 #include "llvm/MC/MCSectionMachO.h"
50 #include "llvm/MC/MCStreamer.h"
51 #include "llvm/MC/MCSymbol.h"
52 #include "llvm/Support/CommandLine.h"
53 #include "llvm/Support/Debug.h"
54 #include "llvm/Support/ELF.h"
55 #include "llvm/Support/ErrorHandling.h"
56 #include "llvm/Support/MathExtras.h"
57 #include "llvm/Support/TargetRegistry.h"
58 #include "llvm/Support/raw_ostream.h"
59 #include "llvm/Target/TargetInstrInfo.h"
60 #include "llvm/Target/TargetOptions.h"
61 #include "llvm/Target/TargetRegisterInfo.h"
64 #define DEBUG_TYPE "asmprinter"
67 class PPCAsmPrinter : public AsmPrinter {
69 MapVector<MCSymbol*, MCSymbol*> TOC;
70 const PPCSubtarget &Subtarget;
73 explicit PPCAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
74 : AsmPrinter(TM, Streamer),
75 Subtarget(TM.getSubtarget<PPCSubtarget>()), TOCLabelID(0) {}
77 const char *getPassName() const override {
78 return "PowerPC Assembly Printer";
81 MCSymbol *lookUpOrCreateTOCEntry(MCSymbol *Sym);
83 void EmitInstruction(const MachineInstr *MI) override;
85 void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);
87 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
88 unsigned AsmVariant, const char *ExtraCode,
89 raw_ostream &O) override;
90 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
91 unsigned AsmVariant, const char *ExtraCode,
92 raw_ostream &O) override;
95 /// PPCLinuxAsmPrinter - PowerPC assembly printer, customized for Linux
96 class PPCLinuxAsmPrinter : public PPCAsmPrinter {
98 explicit PPCLinuxAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
99 : PPCAsmPrinter(TM, Streamer) {}
101 const char *getPassName() const override {
102 return "Linux PPC Assembly Printer";
105 bool doFinalization(Module &M) override;
106 void EmitStartOfAsmFile(Module &M) override;
108 void EmitFunctionEntryLabel() override;
110 void EmitFunctionBodyStart() override;
111 void EmitFunctionBodyEnd() override;
114 /// PPCDarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac
116 class PPCDarwinAsmPrinter : public PPCAsmPrinter {
118 explicit PPCDarwinAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
119 : PPCAsmPrinter(TM, Streamer) {}
121 const char *getPassName() const override {
122 return "Darwin PPC Assembly Printer";
125 bool doFinalization(Module &M) override;
126 void EmitStartOfAsmFile(Module &M) override;
128 void EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs);
130 } // end of anonymous namespace
132 /// stripRegisterPrefix - This method strips the character prefix from a
133 /// register name so that only the number is left. Used by for linux asm.
134 static const char *stripRegisterPrefix(const char *RegName) {
135 switch (RegName[0]) {
139 if (RegName[1] == 's')
142 case 'c': if (RegName[1] == 'r') return RegName + 2;
148 void PPCAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
150 const DataLayout *DL = TM.getDataLayout();
151 const MachineOperand &MO = MI->getOperand(OpNo);
153 switch (MO.getType()) {
154 case MachineOperand::MO_Register: {
155 const char *RegName = PPCInstPrinter::getRegisterName(MO.getReg());
156 // Linux assembler (Others?) does not take register mnemonics.
157 // FIXME - What about special registers used in mfspr/mtspr?
158 if (!Subtarget.isDarwin()) RegName = stripRegisterPrefix(RegName);
162 case MachineOperand::MO_Immediate:
166 case MachineOperand::MO_MachineBasicBlock:
167 O << *MO.getMBB()->getSymbol();
169 case MachineOperand::MO_ConstantPoolIndex:
170 O << DL->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
171 << '_' << MO.getIndex();
173 case MachineOperand::MO_BlockAddress:
174 O << *GetBlockAddressSymbol(MO.getBlockAddress());
176 case MachineOperand::MO_GlobalAddress: {
177 // Computing the address of a global symbol, not calling it.
178 const GlobalValue *GV = MO.getGlobal();
179 MCSymbol *SymToPrint;
181 // External or weakly linked global variables need non-lazily-resolved stubs
182 if (TM.getRelocationModel() != Reloc::Static &&
183 (GV->isDeclaration() || GV->isWeakForLinker())) {
184 if (!GV->hasHiddenVisibility()) {
185 SymToPrint = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
186 MachineModuleInfoImpl::StubValueTy &StubSym =
187 MMI->getObjFileInfo<MachineModuleInfoMachO>()
188 .getGVStubEntry(SymToPrint);
189 if (!StubSym.getPointer())
190 StubSym = MachineModuleInfoImpl::
191 StubValueTy(getSymbol(GV), !GV->hasInternalLinkage());
192 } else if (GV->isDeclaration() || GV->hasCommonLinkage() ||
193 GV->hasAvailableExternallyLinkage()) {
194 SymToPrint = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
196 MachineModuleInfoImpl::StubValueTy &StubSym =
197 MMI->getObjFileInfo<MachineModuleInfoMachO>().
198 getHiddenGVStubEntry(SymToPrint);
199 if (!StubSym.getPointer())
200 StubSym = MachineModuleInfoImpl::
201 StubValueTy(getSymbol(GV), !GV->hasInternalLinkage());
203 SymToPrint = getSymbol(GV);
206 SymToPrint = getSymbol(GV);
211 printOffset(MO.getOffset(), O);
216 O << "<unknown operand type: " << (unsigned)MO.getType() << ">";
221 /// PrintAsmOperand - Print out an operand for an inline asm expression.
223 bool PPCAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
225 const char *ExtraCode, raw_ostream &O) {
226 // Does this asm operand have a single letter operand modifier?
227 if (ExtraCode && ExtraCode[0]) {
228 if (ExtraCode[1] != 0) return true; // Unknown modifier.
230 switch (ExtraCode[0]) {
232 // See if this is a generic print operand
233 return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
234 case 'c': // Don't print "$" before a global var name or constant.
235 break; // PPC never has a prefix.
236 case 'L': // Write second word of DImode reference.
237 // Verify that this operand has two consecutive registers.
238 if (!MI->getOperand(OpNo).isReg() ||
239 OpNo+1 == MI->getNumOperands() ||
240 !MI->getOperand(OpNo+1).isReg())
242 ++OpNo; // Return the high-part.
245 // Write 'i' if an integer constant, otherwise nothing. Used to print
247 if (MI->getOperand(OpNo).isImm())
253 printOperand(MI, OpNo, O);
257 // At the moment, all inline asm memory operands are a single register.
258 // In any case, the output of this routine should always be just one
259 // assembler operand.
261 bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
263 const char *ExtraCode,
265 if (ExtraCode && ExtraCode[0]) {
266 if (ExtraCode[1] != 0) return true; // Unknown modifier.
268 switch (ExtraCode[0]) {
269 default: return true; // Unknown modifier.
270 case 'y': // A memory reference for an X-form instruction
272 const char *RegName = "r0";
273 if (!Subtarget.isDarwin()) RegName = stripRegisterPrefix(RegName);
274 O << RegName << ", ";
275 printOperand(MI, OpNo, O);
281 assert(MI->getOperand(OpNo).isReg());
283 printOperand(MI, OpNo, O);
289 /// lookUpOrCreateTOCEntry -- Given a symbol, look up whether a TOC entry
290 /// exists for it. If not, create one. Then return a symbol that references
292 MCSymbol *PPCAsmPrinter::lookUpOrCreateTOCEntry(MCSymbol *Sym) {
293 const DataLayout *DL = TM.getDataLayout();
294 MCSymbol *&TOCEntry = TOC[Sym];
296 // To avoid name clash check if the name already exists.
298 if (OutContext.LookupSymbol(Twine(DL->getPrivateGlobalPrefix()) +
299 "C" + Twine(TOCLabelID++)) == nullptr) {
300 TOCEntry = GetTempSymbol("C", TOCLabelID);
308 /// EmitInstruction -- Print out a single PowerPC MI in Darwin syntax to
309 /// the current output stream.
311 void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
313 bool isPPC64 = Subtarget.isPPC64();
314 bool isDarwin = Triple(TM.getTargetTriple()).isOSDarwin();
315 const Module *M = MF->getFunction()->getParent();
316 PICLevel::Level PL = M->getPICLevel();
318 // Lower multi-instruction pseudo operations.
319 switch (MI->getOpcode()) {
321 case TargetOpcode::DBG_VALUE:
322 llvm_unreachable("Should be handled target independently");
323 case PPC::MoveGOTtoLR: {
324 // Transform %LR = MoveGOTtoLR
325 // Into this: bl _GLOBAL_OFFSET_TABLE_@local-4
326 // _GLOBAL_OFFSET_TABLE_@local-4 (instruction preceding
327 // _GLOBAL_OFFSET_TABLE_) has exactly one instruction:
329 // This will return the pointer to _GLOBAL_OFFSET_TABLE_@local
330 MCSymbol *GOTSymbol =
331 OutContext.GetOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
332 const MCExpr *OffsExpr =
333 MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(GOTSymbol,
334 MCSymbolRefExpr::VK_PPC_LOCAL,
336 MCConstantExpr::Create(4, OutContext),
340 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL).addExpr(OffsExpr));
343 case PPC::MovePCtoLR:
344 case PPC::MovePCtoLR8: {
345 // Transform %LR = MovePCtoLR
346 // Into this, where the label is the PIC base:
349 MCSymbol *PICBase = MF->getPICBaseSymbol();
352 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL)
353 // FIXME: We would like an efficient form for this, so we don't have to do
354 // a lot of extra uniquing.
355 .addExpr(MCSymbolRefExpr::Create(PICBase, OutContext)));
358 OutStreamer.EmitLabel(PICBase);
361 case PPC::UpdateGBR: {
362 // Transform %Rd = UpdateGBR(%Rt, %Ri)
363 // Into: lwz %Rt, .L0$poff - .L0$pb(%Ri)
365 // Get the offset from the GOT Base Register to the GOT
366 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
367 MCSymbol *PICOffset =
368 MF->getInfo<PPCFunctionInfo>()->getPICOffsetSymbol();
369 TmpInst.setOpcode(PPC::LWZ);
371 MCSymbolRefExpr::Create(PICOffset, MCSymbolRefExpr::VK_None, OutContext);
373 MCSymbolRefExpr::Create(MF->getPICBaseSymbol(),
374 MCSymbolRefExpr::VK_None,
376 const MCOperand TR = TmpInst.getOperand(1);
377 const MCOperand PICR = TmpInst.getOperand(0);
379 // Step 1: lwz %Rt, .L$poff - .L$pb(%Ri)
380 TmpInst.getOperand(1) =
381 MCOperand::CreateExpr(MCBinaryExpr::CreateSub(Exp, PB, OutContext));
382 TmpInst.getOperand(0) = TR;
383 TmpInst.getOperand(2) = PICR;
384 EmitToStreamer(OutStreamer, TmpInst);
386 TmpInst.setOpcode(PPC::ADD4);
387 TmpInst.getOperand(0) = PICR;
388 TmpInst.getOperand(1) = TR;
389 TmpInst.getOperand(2) = PICR;
390 EmitToStreamer(OutStreamer, TmpInst);
394 // Transform %R3 = LWZtoc <ga:@min1>, %R2
395 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
397 // Change the opcode to LWZ, and the global address operand to be a
398 // reference to the GOT entry we will synthesize later.
399 TmpInst.setOpcode(PPC::LWZ);
400 const MachineOperand &MO = MI->getOperand(1);
402 // Map symbol -> label of TOC entry
403 assert(MO.isGlobal() || MO.isCPI() || MO.isJTI());
404 MCSymbol *MOSymbol = nullptr;
406 MOSymbol = getSymbol(MO.getGlobal());
408 MOSymbol = GetCPISymbol(MO.getIndex());
410 MOSymbol = GetJTISymbol(MO.getIndex());
412 if (PL == PICLevel::Small) {
414 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_GOT,
416 TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
418 MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
421 MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_None,
424 MCSymbolRefExpr::Create(OutContext.GetOrCreateSymbol(Twine(".LTOC")),
426 Exp = MCBinaryExpr::CreateSub(Exp, PB, OutContext);
427 TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
429 EmitToStreamer(OutStreamer, TmpInst);
435 // Transform %X3 = LDtoc <ga:@min1>, %X2
436 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
438 // Change the opcode to LD, and the global address operand to be a
439 // reference to the TOC entry we will synthesize later.
440 TmpInst.setOpcode(PPC::LD);
441 const MachineOperand &MO = MI->getOperand(1);
443 // Map symbol -> label of TOC entry
444 assert(MO.isGlobal() || MO.isCPI() || MO.isJTI());
445 MCSymbol *MOSymbol = nullptr;
447 MOSymbol = getSymbol(MO.getGlobal());
449 MOSymbol = GetCPISymbol(MO.getIndex());
451 MOSymbol = GetJTISymbol(MO.getIndex());
453 MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
456 MCSymbolRefExpr::Create(TOCEntry, MCSymbolRefExpr::VK_PPC_TOC,
458 TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
459 EmitToStreamer(OutStreamer, TmpInst);
463 case PPC::ADDIStocHA: {
464 // Transform %Xd = ADDIStocHA %X2, <ga:@sym>
465 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
467 // Change the opcode to ADDIS8. If the global address is external, has
468 // common linkage, is a non-local function address, or is a jump table
469 // address, then generate a TOC entry and reference that. Otherwise
470 // reference the symbol directly.
471 TmpInst.setOpcode(PPC::ADDIS8);
472 const MachineOperand &MO = MI->getOperand(2);
473 assert((MO.isGlobal() || MO.isCPI() || MO.isJTI()) &&
474 "Invalid operand for ADDIStocHA!");
475 MCSymbol *MOSymbol = nullptr;
476 bool IsExternal = false;
477 bool IsNonLocalFunction = false;
478 bool IsCommon = false;
479 bool IsAvailExt = false;
482 const GlobalValue *GV = MO.getGlobal();
483 MOSymbol = getSymbol(GV);
484 IsExternal = GV->isDeclaration();
485 IsCommon = GV->hasCommonLinkage();
486 IsNonLocalFunction = GV->getType()->getElementType()->isFunctionTy() &&
487 (GV->isDeclaration() || GV->isWeakForLinker());
488 IsAvailExt = GV->hasAvailableExternallyLinkage();
489 } else if (MO.isCPI())
490 MOSymbol = GetCPISymbol(MO.getIndex());
492 MOSymbol = GetJTISymbol(MO.getIndex());
494 if (IsExternal || IsNonLocalFunction || IsCommon || IsAvailExt ||
495 MO.isJTI() || TM.getCodeModel() == CodeModel::Large)
496 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
499 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_HA,
501 TmpInst.getOperand(2) = MCOperand::CreateExpr(Exp);
502 EmitToStreamer(OutStreamer, TmpInst);
506 // Transform %Xd = LDtocL <ga:@sym>, %Xs
507 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
509 // Change the opcode to LD. If the global address is external, has
510 // common linkage, or is a jump table address, then reference the
511 // associated TOC entry. Otherwise reference the symbol directly.
512 TmpInst.setOpcode(PPC::LD);
513 const MachineOperand &MO = MI->getOperand(1);
514 assert((MO.isGlobal() || MO.isJTI() || MO.isCPI()) &&
515 "Invalid operand for LDtocL!");
516 MCSymbol *MOSymbol = nullptr;
519 MOSymbol = lookUpOrCreateTOCEntry(GetJTISymbol(MO.getIndex()));
520 else if (MO.isCPI()) {
521 MOSymbol = GetCPISymbol(MO.getIndex());
522 if (TM.getCodeModel() == CodeModel::Large)
523 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
525 else if (MO.isGlobal()) {
526 const GlobalValue *GValue = MO.getGlobal();
527 MOSymbol = getSymbol(GValue);
528 if (GValue->getType()->getElementType()->isFunctionTy() ||
529 GValue->isDeclaration() || GValue->hasCommonLinkage() ||
530 GValue->hasAvailableExternallyLinkage() ||
531 TM.getCodeModel() == CodeModel::Large)
532 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
536 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_LO,
538 TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
539 EmitToStreamer(OutStreamer, TmpInst);
542 case PPC::ADDItocL: {
543 // Transform %Xd = ADDItocL %Xs, <ga:@sym>
544 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
546 // Change the opcode to ADDI8. If the global address is external, then
547 // generate a TOC entry and reference that. Otherwise reference the
549 TmpInst.setOpcode(PPC::ADDI8);
550 const MachineOperand &MO = MI->getOperand(2);
551 assert((MO.isGlobal() || MO.isCPI()) && "Invalid operand for ADDItocL");
552 MCSymbol *MOSymbol = nullptr;
553 bool IsExternal = false;
554 bool IsNonLocalFunction = false;
557 const GlobalValue *GV = MO.getGlobal();
558 MOSymbol = getSymbol(GV);
559 IsExternal = GV->isDeclaration();
560 IsNonLocalFunction = GV->getType()->getElementType()->isFunctionTy() &&
561 (GV->isDeclaration() || GV->isWeakForLinker());
562 } else if (MO.isCPI())
563 MOSymbol = GetCPISymbol(MO.getIndex());
565 if (IsNonLocalFunction || IsExternal ||
566 TM.getCodeModel() == CodeModel::Large)
567 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
570 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_LO,
572 TmpInst.getOperand(2) = MCOperand::CreateExpr(Exp);
573 EmitToStreamer(OutStreamer, TmpInst);
576 case PPC::ADDISgotTprelHA: {
577 // Transform: %Xd = ADDISgotTprelHA %X2, <ga:@sym>
578 // Into: %Xd = ADDIS8 %X2, sym@got@tlsgd@ha
579 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
580 const MachineOperand &MO = MI->getOperand(2);
581 const GlobalValue *GValue = MO.getGlobal();
582 MCSymbol *MOSymbol = getSymbol(GValue);
583 const MCExpr *SymGotTprel =
584 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA,
586 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
587 .addReg(MI->getOperand(0).getReg())
589 .addExpr(SymGotTprel));
592 case PPC::LDgotTprelL:
593 case PPC::LDgotTprelL32: {
594 // Transform %Xd = LDgotTprelL <ga:@sym>, %Xs
595 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
597 // Change the opcode to LD.
598 TmpInst.setOpcode(isPPC64 ? PPC::LD : PPC::LWZ);
599 const MachineOperand &MO = MI->getOperand(1);
600 const GlobalValue *GValue = MO.getGlobal();
601 MCSymbol *MOSymbol = getSymbol(GValue);
603 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO,
605 TmpInst.getOperand(1) = MCOperand::CreateExpr(Exp);
606 EmitToStreamer(OutStreamer, TmpInst);
610 case PPC::PPC32PICGOT: {
611 MCSymbol *GOTSymbol = OutContext.GetOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
612 MCSymbol *GOTRef = OutContext.CreateTempSymbol();
613 MCSymbol *NextInstr = OutContext.CreateTempSymbol();
615 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BL)
616 // FIXME: We would like an efficient form for this, so we don't have to do
617 // a lot of extra uniquing.
618 .addExpr(MCSymbolRefExpr::Create(NextInstr, OutContext)));
619 const MCExpr *OffsExpr =
620 MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(GOTSymbol, OutContext),
621 MCSymbolRefExpr::Create(GOTRef, OutContext),
623 OutStreamer.EmitLabel(GOTRef);
624 OutStreamer.EmitValue(OffsExpr, 4);
625 OutStreamer.EmitLabel(NextInstr);
626 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MFLR)
627 .addReg(MI->getOperand(0).getReg()));
628 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LWZ)
629 .addReg(MI->getOperand(1).getReg())
631 .addReg(MI->getOperand(0).getReg()));
632 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADD4)
633 .addReg(MI->getOperand(0).getReg())
634 .addReg(MI->getOperand(1).getReg())
635 .addReg(MI->getOperand(0).getReg()));
638 case PPC::PPC32GOT: {
639 MCSymbol *GOTSymbol = OutContext.GetOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
640 const MCExpr *SymGotTlsL =
641 MCSymbolRefExpr::Create(GOTSymbol, MCSymbolRefExpr::VK_PPC_LO,
643 const MCExpr *SymGotTlsHA =
644 MCSymbolRefExpr::Create(GOTSymbol, MCSymbolRefExpr::VK_PPC_HA,
646 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LI)
647 .addReg(MI->getOperand(0).getReg())
648 .addExpr(SymGotTlsL));
649 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS)
650 .addReg(MI->getOperand(0).getReg())
651 .addReg(MI->getOperand(0).getReg())
652 .addExpr(SymGotTlsHA));
655 case PPC::ADDIStlsgdHA: {
656 // Transform: %Xd = ADDIStlsgdHA %X2, <ga:@sym>
657 // Into: %Xd = ADDIS8 %X2, sym@got@tlsgd@ha
658 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
659 const MachineOperand &MO = MI->getOperand(2);
660 const GlobalValue *GValue = MO.getGlobal();
661 MCSymbol *MOSymbol = getSymbol(GValue);
662 const MCExpr *SymGotTlsGD =
663 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA,
665 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
666 .addReg(MI->getOperand(0).getReg())
668 .addExpr(SymGotTlsGD));
671 case PPC::ADDItlsgdL:
672 // Transform: %Xd = ADDItlsgdL %Xs, <ga:@sym>
673 // Into: %Xd = ADDI8 %Xs, sym@got@tlsgd@l
674 case PPC::ADDItlsgdL32: {
675 // Transform: %Rd = ADDItlsgdL32 %Rs, <ga:@sym>
676 // Into: %Rd = ADDI %Rs, sym@got@tlsgd
677 const MachineOperand &MO = MI->getOperand(2);
678 const GlobalValue *GValue = MO.getGlobal();
679 MCSymbol *MOSymbol = getSymbol(GValue);
680 const MCExpr *SymGotTlsGD =
681 MCSymbolRefExpr::Create(MOSymbol, Subtarget.isPPC64() ?
682 MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO :
683 MCSymbolRefExpr::VK_PPC_GOT_TLSGD,
685 EmitToStreamer(OutStreamer,
686 MCInstBuilder(Subtarget.isPPC64() ? PPC::ADDI8 : PPC::ADDI)
687 .addReg(MI->getOperand(0).getReg())
688 .addReg(MI->getOperand(1).getReg())
689 .addExpr(SymGotTlsGD));
692 case PPC::ADDIStlsldHA: {
693 // Transform: %Xd = ADDIStlsldHA %X2, <ga:@sym>
694 // Into: %Xd = ADDIS8 %X2, sym@got@tlsld@ha
695 assert(Subtarget.isPPC64() && "Not supported for 32-bit PowerPC");
696 const MachineOperand &MO = MI->getOperand(2);
697 const GlobalValue *GValue = MO.getGlobal();
698 MCSymbol *MOSymbol = getSymbol(GValue);
699 const MCExpr *SymGotTlsLD =
700 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA,
702 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS8)
703 .addReg(MI->getOperand(0).getReg())
705 .addExpr(SymGotTlsLD));
708 case PPC::ADDItlsldL:
709 // Transform: %Xd = ADDItlsldL %Xs, <ga:@sym>
710 // Into: %Xd = ADDI8 %Xs, sym@got@tlsld@l
711 case PPC::ADDItlsldL32: {
712 // Transform: %Rd = ADDItlsldL32 %Rs, <ga:@sym>
713 // Into: %Rd = ADDI %Rs, sym@got@tlsld
714 const MachineOperand &MO = MI->getOperand(2);
715 const GlobalValue *GValue = MO.getGlobal();
716 MCSymbol *MOSymbol = getSymbol(GValue);
717 const MCExpr *SymGotTlsLD =
718 MCSymbolRefExpr::Create(MOSymbol, Subtarget.isPPC64() ?
719 MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO :
720 MCSymbolRefExpr::VK_PPC_GOT_TLSLD,
722 EmitToStreamer(OutStreamer,
723 MCInstBuilder(Subtarget.isPPC64() ? PPC::ADDI8 : PPC::ADDI)
724 .addReg(MI->getOperand(0).getReg())
725 .addReg(MI->getOperand(1).getReg())
726 .addExpr(SymGotTlsLD));
729 case PPC::ADDISdtprelHA:
730 // Transform: %Xd = ADDISdtprelHA %X3, <ga:@sym>
731 // Into: %Xd = ADDIS8 %X3, sym@dtprel@ha
732 case PPC::ADDISdtprelHA32: {
733 // Transform: %Rd = ADDISdtprelHA32 %R3, <ga:@sym>
734 // Into: %Rd = ADDIS %R3, sym@dtprel@ha
735 const MachineOperand &MO = MI->getOperand(2);
736 const GlobalValue *GValue = MO.getGlobal();
737 MCSymbol *MOSymbol = getSymbol(GValue);
738 const MCExpr *SymDtprel =
739 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL_HA,
741 EmitToStreamer(OutStreamer,
742 MCInstBuilder(Subtarget.isPPC64() ? PPC::ADDIS8 : PPC::ADDIS)
743 .addReg(MI->getOperand(0).getReg())
744 .addReg(Subtarget.isPPC64() ? PPC::X3 : PPC::R3)
745 .addExpr(SymDtprel));
748 case PPC::ADDIdtprelL:
749 // Transform: %Xd = ADDIdtprelL %Xs, <ga:@sym>
750 // Into: %Xd = ADDI8 %Xs, sym@dtprel@l
751 case PPC::ADDIdtprelL32: {
752 // Transform: %Rd = ADDIdtprelL32 %Rs, <ga:@sym>
753 // Into: %Rd = ADDI %Rs, sym@dtprel@l
754 const MachineOperand &MO = MI->getOperand(2);
755 const GlobalValue *GValue = MO.getGlobal();
756 MCSymbol *MOSymbol = getSymbol(GValue);
757 const MCExpr *SymDtprel =
758 MCSymbolRefExpr::Create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL_LO,
760 EmitToStreamer(OutStreamer,
761 MCInstBuilder(Subtarget.isPPC64() ? PPC::ADDI8 : PPC::ADDI)
762 .addReg(MI->getOperand(0).getReg())
763 .addReg(MI->getOperand(1).getReg())
764 .addExpr(SymDtprel));
769 if (!Subtarget.hasMFOCRF()) {
770 // Transform: %R3 = MFOCRF %CR7
771 // Into: %R3 = MFCR ;; cr7
773 MI->getOpcode() == PPC::MFOCRF ? PPC::MFCR : PPC::MFCR8;
774 OutStreamer.AddComment(PPCInstPrinter::
775 getRegisterName(MI->getOperand(1).getReg()));
776 EmitToStreamer(OutStreamer, MCInstBuilder(NewOpcode)
777 .addReg(MI->getOperand(0).getReg()));
783 if (!Subtarget.hasMFOCRF()) {
784 // Transform: %CR7 = MTOCRF %R3
785 // Into: MTCRF mask, %R3 ;; cr7
787 MI->getOpcode() == PPC::MTOCRF ? PPC::MTCRF : PPC::MTCRF8;
788 unsigned Mask = 0x80 >> OutContext.getRegisterInfo()
789 ->getEncodingValue(MI->getOperand(0).getReg());
790 OutStreamer.AddComment(PPCInstPrinter::
791 getRegisterName(MI->getOperand(0).getReg()));
792 EmitToStreamer(OutStreamer, MCInstBuilder(NewOpcode)
794 .addReg(MI->getOperand(1).getReg()));
802 // Verify alignment is legal, so we don't create relocations
803 // that can't be supported.
804 // FIXME: This test is currently disabled for Darwin. The test
805 // suite shows a handful of test cases that fail this check for
806 // Darwin. Those need to be investigated before this sanity test
807 // can be enabled for those subtargets.
808 if (!Subtarget.isDarwin()) {
809 unsigned OpNum = (MI->getOpcode() == PPC::STD) ? 2 : 1;
810 const MachineOperand &MO = MI->getOperand(OpNum);
811 if (MO.isGlobal() && MO.getGlobal()->getAlignment() < 4)
812 llvm_unreachable("Global must be word-aligned for LD, STD, LWA!");
814 // Now process the instruction normally.
819 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
820 EmitToStreamer(OutStreamer, TmpInst);
823 void PPCLinuxAsmPrinter::EmitStartOfAsmFile(Module &M) {
824 if (Subtarget.isELFv2ABI()) {
825 PPCTargetStreamer *TS =
826 static_cast<PPCTargetStreamer *>(OutStreamer.getTargetStreamer());
829 TS->emitAbiVersion(2);
832 if (Subtarget.isPPC64() || TM.getRelocationModel() != Reloc::PIC_)
833 return AsmPrinter::EmitStartOfAsmFile(M);
835 if (M.getPICLevel() == PICLevel::Small)
836 return AsmPrinter::EmitStartOfAsmFile(M);
838 OutStreamer.SwitchSection(OutContext.getELFSection(".got2",
839 ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
840 SectionKind::getReadOnly()));
842 MCSymbol *TOCSym = OutContext.GetOrCreateSymbol(Twine(".LTOC"));
843 MCSymbol *CurrentPos = OutContext.CreateTempSymbol();
845 OutStreamer.EmitLabel(CurrentPos);
847 // The GOT pointer points to the middle of the GOT, in order to reference the
848 // entire 64kB range. 0x8000 is the midpoint.
849 const MCExpr *tocExpr =
850 MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(CurrentPos, OutContext),
851 MCConstantExpr::Create(0x8000, OutContext),
854 OutStreamer.EmitAssignment(TOCSym, tocExpr);
856 OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
859 void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
860 // linux/ppc32 - Normal entry label.
861 if (!Subtarget.isPPC64() &&
862 (TM.getRelocationModel() != Reloc::PIC_ ||
863 MF->getFunction()->getParent()->getPICLevel() == PICLevel::Small))
864 return AsmPrinter::EmitFunctionEntryLabel();
866 if (!Subtarget.isPPC64()) {
867 const PPCFunctionInfo *PPCFI = MF->getInfo<PPCFunctionInfo>();
868 if (PPCFI->usesPICBase()) {
869 MCSymbol *RelocSymbol = PPCFI->getPICOffsetSymbol();
870 MCSymbol *PICBase = MF->getPICBaseSymbol();
871 OutStreamer.EmitLabel(RelocSymbol);
873 const MCExpr *OffsExpr =
874 MCBinaryExpr::CreateSub(
875 MCSymbolRefExpr::Create(OutContext.GetOrCreateSymbol(Twine(".LTOC")),
877 MCSymbolRefExpr::Create(PICBase, OutContext),
879 OutStreamer.EmitValue(OffsExpr, 4);
880 OutStreamer.EmitLabel(CurrentFnSym);
883 return AsmPrinter::EmitFunctionEntryLabel();
886 // ELFv2 ABI - Normal entry label.
887 if (Subtarget.isELFv2ABI())
888 return AsmPrinter::EmitFunctionEntryLabel();
890 // Emit an official procedure descriptor.
891 MCSectionSubPair Current = OutStreamer.getCurrentSection();
892 const MCSectionELF *Section = OutStreamer.getContext().getELFSection(".opd",
893 ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
894 SectionKind::getReadOnly());
895 OutStreamer.SwitchSection(Section);
896 OutStreamer.EmitLabel(CurrentFnSym);
897 OutStreamer.EmitValueToAlignment(8);
899 OutContext.GetOrCreateSymbol(".L." + Twine(CurrentFnSym->getName()));
900 // Generates a R_PPC64_ADDR64 (from FK_DATA_8) relocation for the function
902 OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol1, OutContext),
904 MCSymbol *Symbol2 = OutContext.GetOrCreateSymbol(StringRef(".TOC."));
905 // Generates a R_PPC64_TOC relocation for TOC base insertion.
906 OutStreamer.EmitValue(MCSymbolRefExpr::Create(Symbol2,
907 MCSymbolRefExpr::VK_PPC_TOCBASE, OutContext),
909 // Emit a null environment pointer.
910 OutStreamer.EmitIntValue(0, 8 /* size */);
911 OutStreamer.SwitchSection(Current.first, Current.second);
913 MCSymbol *RealFnSym = OutContext.GetOrCreateSymbol(
914 ".L." + Twine(CurrentFnSym->getName()));
915 OutStreamer.EmitLabel(RealFnSym);
916 CurrentFnSymForSize = RealFnSym;
920 bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
921 const DataLayout *TD = TM.getDataLayout();
923 bool isPPC64 = TD->getPointerSizeInBits() == 64;
925 PPCTargetStreamer &TS =
926 static_cast<PPCTargetStreamer &>(*OutStreamer.getTargetStreamer());
929 const MCSectionELF *Section;
932 Section = OutStreamer.getContext().getELFSection(".toc",
933 ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
934 SectionKind::getReadOnly());
936 Section = OutStreamer.getContext().getELFSection(".got2",
937 ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC,
938 SectionKind::getReadOnly());
939 OutStreamer.SwitchSection(Section);
941 for (MapVector<MCSymbol*, MCSymbol*>::iterator I = TOC.begin(),
942 E = TOC.end(); I != E; ++I) {
943 OutStreamer.EmitLabel(I->second);
944 MCSymbol *S = OutContext.GetOrCreateSymbol(I->first->getName());
948 OutStreamer.EmitSymbolValue(S, 4);
952 MachineModuleInfoELF &MMIELF =
953 MMI->getObjFileInfo<MachineModuleInfoELF>();
955 MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
956 if (!Stubs.empty()) {
957 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
958 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
960 OutStreamer.EmitLabel(Stubs[i].first);
962 OutStreamer.EmitValue(MCSymbolRefExpr::Create(Stubs[i].second.getPointer(),
964 isPPC64 ? 8 : 4/*size*/);
968 OutStreamer.AddBlankLine();
971 return AsmPrinter::doFinalization(M);
974 /// EmitFunctionBodyStart - Emit a global entry point prefix for ELFv2.
975 void PPCLinuxAsmPrinter::EmitFunctionBodyStart() {
976 // In the ELFv2 ABI, in functions that use the TOC register, we need to
977 // provide two entry points. The ABI guarantees that when calling the
978 // local entry point, r2 is set up by the caller to contain the TOC base
979 // for this function, and when calling the global entry point, r12 is set
980 // up by the caller to hold the address of the global entry point. We
981 // thus emit a prefix sequence along the following lines:
984 // # global entry point
985 // addis r2,r12,(.TOC.-func)@ha
986 // addi r2,r2,(.TOC.-func)@l
987 // .localentry func, .-func
988 // # local entry point, followed by function body
990 // This ensures we have r2 set up correctly while executing the function
991 // body, no matter which entry point is called.
992 if (Subtarget.isELFv2ABI()
993 // Only do all that if the function uses r2 in the first place.
994 && !MF->getRegInfo().use_empty(PPC::X2)) {
996 MCSymbol *GlobalEntryLabel = OutContext.CreateTempSymbol();
997 OutStreamer.EmitLabel(GlobalEntryLabel);
998 const MCSymbolRefExpr *GlobalEntryLabelExp =
999 MCSymbolRefExpr::Create(GlobalEntryLabel, OutContext);
1001 MCSymbol *TOCSymbol = OutContext.GetOrCreateSymbol(StringRef(".TOC."));
1002 const MCExpr *TOCDeltaExpr =
1003 MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(TOCSymbol, OutContext),
1004 GlobalEntryLabelExp, OutContext);
1006 const MCExpr *TOCDeltaHi =
1007 PPCMCExpr::CreateHa(TOCDeltaExpr, false, OutContext);
1008 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS)
1011 .addExpr(TOCDeltaHi));
1013 const MCExpr *TOCDeltaLo =
1014 PPCMCExpr::CreateLo(TOCDeltaExpr, false, OutContext);
1015 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDI)
1018 .addExpr(TOCDeltaLo));
1020 MCSymbol *LocalEntryLabel = OutContext.CreateTempSymbol();
1021 OutStreamer.EmitLabel(LocalEntryLabel);
1022 const MCSymbolRefExpr *LocalEntryLabelExp =
1023 MCSymbolRefExpr::Create(LocalEntryLabel, OutContext);
1024 const MCExpr *LocalOffsetExp =
1025 MCBinaryExpr::CreateSub(LocalEntryLabelExp,
1026 GlobalEntryLabelExp, OutContext);
1028 PPCTargetStreamer *TS =
1029 static_cast<PPCTargetStreamer *>(OutStreamer.getTargetStreamer());
1032 TS->emitLocalEntry(CurrentFnSym, LocalOffsetExp);
1036 /// EmitFunctionBodyEnd - Print the traceback table before the .size
1039 void PPCLinuxAsmPrinter::EmitFunctionBodyEnd() {
1040 // Only the 64-bit target requires a traceback table. For now,
1041 // we only emit the word of zeroes that GDB requires to find
1042 // the end of the function, and zeroes for the eight-byte
1043 // mandatory fields.
1044 // FIXME: We should fill in the eight-byte mandatory fields as described in
1045 // the PPC64 ELF ABI (this is a low-priority item because GDB does not
1046 // currently make use of these fields).
1047 if (Subtarget.isPPC64()) {
1048 OutStreamer.EmitIntValue(0, 4/*size*/);
1049 OutStreamer.EmitIntValue(0, 8/*size*/);
1053 void PPCDarwinAsmPrinter::EmitStartOfAsmFile(Module &M) {
1054 static const char *const CPUDirectives[] = {
1078 unsigned Directive = Subtarget.getDarwinDirective();
1079 if (Subtarget.hasMFOCRF() && Directive < PPC::DIR_970)
1080 Directive = PPC::DIR_970;
1081 if (Subtarget.hasAltivec() && Directive < PPC::DIR_7400)
1082 Directive = PPC::DIR_7400;
1083 if (Subtarget.isPPC64() && Directive < PPC::DIR_64)
1084 Directive = PPC::DIR_64;
1085 assert(Directive <= PPC::DIR_64 && "Directive out of range.");
1087 assert(Directive < array_lengthof(CPUDirectives) &&
1088 "CPUDirectives[] might not be up-to-date!");
1089 PPCTargetStreamer &TStreamer =
1090 *static_cast<PPCTargetStreamer *>(OutStreamer.getTargetStreamer());
1091 TStreamer.emitMachine(CPUDirectives[Directive]);
1093 // Prime text sections so they are adjacent. This reduces the likelihood a
1094 // large data or debug section causes a branch to exceed 16M limit.
1095 const TargetLoweringObjectFileMachO &TLOFMacho =
1096 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
1097 OutStreamer.SwitchSection(TLOFMacho.getTextCoalSection());
1098 if (TM.getRelocationModel() == Reloc::PIC_) {
1099 OutStreamer.SwitchSection(
1100 OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
1101 MachO::S_SYMBOL_STUBS |
1102 MachO::S_ATTR_PURE_INSTRUCTIONS,
1103 32, SectionKind::getText()));
1104 } else if (TM.getRelocationModel() == Reloc::DynamicNoPIC) {
1105 OutStreamer.SwitchSection(
1106 OutContext.getMachOSection("__TEXT","__symbol_stub1",
1107 MachO::S_SYMBOL_STUBS |
1108 MachO::S_ATTR_PURE_INSTRUCTIONS,
1109 16, SectionKind::getText()));
1111 OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
1114 static MCSymbol *GetLazyPtr(MCSymbol *Sym, MCContext &Ctx) {
1115 // Remove $stub suffix, add $lazy_ptr.
1116 StringRef NoStub = Sym->getName().substr(0, Sym->getName().size()-5);
1117 return Ctx.GetOrCreateSymbol(NoStub + "$lazy_ptr");
1120 static MCSymbol *GetAnonSym(MCSymbol *Sym, MCContext &Ctx) {
1121 // Add $tmp suffix to $stub, yielding $stub$tmp.
1122 return Ctx.GetOrCreateSymbol(Sym->getName() + "$tmp");
1125 void PPCDarwinAsmPrinter::
1126 EmitFunctionStubs(const MachineModuleInfoMachO::SymbolListTy &Stubs) {
1127 bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
1128 bool isDarwin = Subtarget.isDarwin();
1130 const TargetLoweringObjectFileMachO &TLOFMacho =
1131 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
1133 // .lazy_symbol_pointer
1134 const MCSection *LSPSection = TLOFMacho.getLazySymbolPointerSection();
1136 // Output stubs for dynamically-linked functions
1137 if (TM.getRelocationModel() == Reloc::PIC_) {
1138 const MCSection *StubSection =
1139 OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
1140 MachO::S_SYMBOL_STUBS |
1141 MachO::S_ATTR_PURE_INSTRUCTIONS,
1142 32, SectionKind::getText());
1143 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
1144 OutStreamer.SwitchSection(StubSection);
1147 MCSymbol *Stub = Stubs[i].first;
1148 MCSymbol *RawSym = Stubs[i].second.getPointer();
1149 MCSymbol *LazyPtr = GetLazyPtr(Stub, OutContext);
1150 MCSymbol *AnonSymbol = GetAnonSym(Stub, OutContext);
1152 OutStreamer.EmitLabel(Stub);
1153 OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
1155 const MCExpr *Anon = MCSymbolRefExpr::Create(AnonSymbol, OutContext);
1156 const MCExpr *LazyPtrExpr = MCSymbolRefExpr::Create(LazyPtr, OutContext);
1158 MCBinaryExpr::CreateSub(LazyPtrExpr, Anon, OutContext);
1161 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MFLR).addReg(PPC::R0));
1162 // bcl 20, 31, AnonSymbol
1163 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCLalways).addExpr(Anon));
1164 OutStreamer.EmitLabel(AnonSymbol);
1166 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MFLR).addReg(PPC::R11));
1167 // addis r11, r11, ha16(LazyPtr - AnonSymbol)
1168 const MCExpr *SubHa16 = PPCMCExpr::CreateHa(Sub, isDarwin, OutContext);
1169 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::ADDIS)
1174 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTLR).addReg(PPC::R0));
1176 // ldu r12, lo16(LazyPtr - AnonSymbol)(r11)
1177 // lwzu r12, lo16(LazyPtr - AnonSymbol)(r11)
1178 const MCExpr *SubLo16 = PPCMCExpr::CreateLo(Sub, isDarwin, OutContext);
1179 EmitToStreamer(OutStreamer, MCInstBuilder(isPPC64 ? PPC::LDU : PPC::LWZU)
1181 .addExpr(SubLo16).addExpr(SubLo16)
1184 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTCTR).addReg(PPC::R12));
1186 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCTR));
1188 OutStreamer.SwitchSection(LSPSection);
1189 OutStreamer.EmitLabel(LazyPtr);
1190 OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
1192 MCSymbol *DyldStubBindingHelper =
1193 OutContext.GetOrCreateSymbol(StringRef("dyld_stub_binding_helper"));
1195 // .quad dyld_stub_binding_helper
1196 OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 8);
1198 // .long dyld_stub_binding_helper
1199 OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 4);
1202 OutStreamer.AddBlankLine();
1206 const MCSection *StubSection =
1207 OutContext.getMachOSection("__TEXT","__symbol_stub1",
1208 MachO::S_SYMBOL_STUBS |
1209 MachO::S_ATTR_PURE_INSTRUCTIONS,
1210 16, SectionKind::getText());
1211 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
1212 MCSymbol *Stub = Stubs[i].first;
1213 MCSymbol *RawSym = Stubs[i].second.getPointer();
1214 MCSymbol *LazyPtr = GetLazyPtr(Stub, OutContext);
1215 const MCExpr *LazyPtrExpr = MCSymbolRefExpr::Create(LazyPtr, OutContext);
1217 OutStreamer.SwitchSection(StubSection);
1219 OutStreamer.EmitLabel(Stub);
1220 OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
1222 // lis r11, ha16(LazyPtr)
1223 const MCExpr *LazyPtrHa16 =
1224 PPCMCExpr::CreateHa(LazyPtrExpr, isDarwin, OutContext);
1225 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::LIS)
1227 .addExpr(LazyPtrHa16));
1229 // ldu r12, lo16(LazyPtr)(r11)
1230 // lwzu r12, lo16(LazyPtr)(r11)
1231 const MCExpr *LazyPtrLo16 =
1232 PPCMCExpr::CreateLo(LazyPtrExpr, isDarwin, OutContext);
1233 EmitToStreamer(OutStreamer, MCInstBuilder(isPPC64 ? PPC::LDU : PPC::LWZU)
1235 .addExpr(LazyPtrLo16).addExpr(LazyPtrLo16)
1239 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::MTCTR).addReg(PPC::R12));
1241 EmitToStreamer(OutStreamer, MCInstBuilder(PPC::BCTR));
1243 OutStreamer.SwitchSection(LSPSection);
1244 OutStreamer.EmitLabel(LazyPtr);
1245 OutStreamer.EmitSymbolAttribute(RawSym, MCSA_IndirectSymbol);
1247 MCSymbol *DyldStubBindingHelper =
1248 OutContext.GetOrCreateSymbol(StringRef("dyld_stub_binding_helper"));
1250 // .quad dyld_stub_binding_helper
1251 OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 8);
1253 // .long dyld_stub_binding_helper
1254 OutStreamer.EmitSymbolValue(DyldStubBindingHelper, 4);
1258 OutStreamer.AddBlankLine();
1262 bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
1263 bool isPPC64 = TM.getDataLayout()->getPointerSizeInBits() == 64;
1265 // Darwin/PPC always uses mach-o.
1266 const TargetLoweringObjectFileMachO &TLOFMacho =
1267 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
1268 MachineModuleInfoMachO &MMIMacho =
1269 MMI->getObjFileInfo<MachineModuleInfoMachO>();
1271 MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetFnStubList();
1273 EmitFunctionStubs(Stubs);
1275 if (MAI->doesSupportExceptionHandling() && MMI) {
1276 // Add the (possibly multiple) personalities to the set of global values.
1277 // Only referenced functions get into the Personalities list.
1278 const std::vector<const Function*> &Personalities = MMI->getPersonalities();
1279 for (std::vector<const Function*>::const_iterator I = Personalities.begin(),
1280 E = Personalities.end(); I != E; ++I) {
1282 MCSymbol *NLPSym = getSymbolWithGlobalValueBase(*I, "$non_lazy_ptr");
1283 MachineModuleInfoImpl::StubValueTy &StubSym =
1284 MMIMacho.getGVStubEntry(NLPSym);
1285 StubSym = MachineModuleInfoImpl::StubValueTy(getSymbol(*I), true);
1290 // Output stubs for dynamically-linked functions.
1291 Stubs = MMIMacho.GetGVStubList();
1293 // Output macho stubs for external and common global variables.
1294 if (!Stubs.empty()) {
1295 // Switch with ".non_lazy_symbol_pointer" directive.
1296 OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
1297 EmitAlignment(isPPC64 ? 3 : 2);
1299 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
1301 OutStreamer.EmitLabel(Stubs[i].first);
1302 // .indirect_symbol _foo
1303 MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
1304 OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol);
1307 // External to current translation unit.
1308 OutStreamer.EmitIntValue(0, isPPC64 ? 8 : 4/*size*/);
1310 // Internal to current translation unit.
1312 // When we place the LSDA into the TEXT section, the type info pointers
1313 // need to be indirect and pc-rel. We accomplish this by using NLPs.
1314 // However, sometimes the types are local to the file. So we need to
1315 // fill in the value for the NLP in those cases.
1316 OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
1318 isPPC64 ? 8 : 4/*size*/);
1322 OutStreamer.AddBlankLine();
1325 Stubs = MMIMacho.GetHiddenGVStubList();
1326 if (!Stubs.empty()) {
1327 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
1328 EmitAlignment(isPPC64 ? 3 : 2);
1330 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
1332 OutStreamer.EmitLabel(Stubs[i].first);
1334 OutStreamer.EmitValue(MCSymbolRefExpr::
1335 Create(Stubs[i].second.getPointer(),
1337 isPPC64 ? 8 : 4/*size*/);
1341 OutStreamer.AddBlankLine();
1344 // Funny Darwin hack: This flag tells the linker that no global symbols
1345 // contain code that falls through to other global symbols (e.g. the obvious
1346 // implementation of multiple entry points). If this doesn't occur, the
1347 // linker can safely perform dead code stripping. Since LLVM never generates
1348 // code that does this, it is always safe to set.
1349 OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
1351 return AsmPrinter::doFinalization(M);
1354 /// createPPCAsmPrinterPass - Returns a pass that prints the PPC assembly code
1355 /// for a MachineFunction to the given output stream, in a format that the
1356 /// Darwin assembler can deal with.
1358 static AsmPrinter *createPPCAsmPrinterPass(TargetMachine &tm,
1359 MCStreamer &Streamer) {
1360 const PPCSubtarget *Subtarget = &tm.getSubtarget<PPCSubtarget>();
1362 if (Subtarget->isDarwin())
1363 return new PPCDarwinAsmPrinter(tm, Streamer);
1364 return new PPCLinuxAsmPrinter(tm, Streamer);
1367 // Force static initialization.
1368 extern "C" void LLVMInitializePowerPCAsmPrinter() {
1369 TargetRegistry::RegisterAsmPrinter(ThePPC32Target, createPPCAsmPrinterPass);
1370 TargetRegistry::RegisterAsmPrinter(ThePPC64Target, createPPCAsmPrinterPass);
1371 TargetRegistry::RegisterAsmPrinter(ThePPC64LETarget, createPPCAsmPrinterPass);