1 //===-- ARMAsmPrinter.cpp - ARM LLVM assembly writer ----------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the "Instituto Nokia de Tecnologia" and
6 // is distributed under the University of Illinois Open Source
7 // License. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 // This file contains a printer that converts from our internal representation
12 // of machine-dependent LLVM code to GAS-format ARM assembly language.
14 //===----------------------------------------------------------------------===//
16 #define DEBUG_TYPE "asm-printer"
18 #include "ARMTargetMachine.h"
19 #include "ARMAddressingModes.h"
20 #include "ARMConstantPoolValue.h"
21 #include "ARMMachineFunctionInfo.h"
22 #include "llvm/Constants.h"
23 #include "llvm/Module.h"
24 #include "llvm/CodeGen/AsmPrinter.h"
25 #include "llvm/CodeGen/DwarfWriter.h"
26 #include "llvm/CodeGen/MachineModuleInfo.h"
27 #include "llvm/CodeGen/MachineFunctionPass.h"
28 #include "llvm/CodeGen/MachineJumpTableInfo.h"
29 #include "llvm/Target/TargetAsmInfo.h"
30 #include "llvm/Target/TargetData.h"
31 #include "llvm/Target/TargetMachine.h"
32 #include "llvm/Target/TargetOptions.h"
33 #include "llvm/ADT/Statistic.h"
34 #include "llvm/ADT/StringExtras.h"
35 #include "llvm/Support/Compiler.h"
36 #include "llvm/Support/Mangler.h"
37 #include "llvm/Support/MathExtras.h"
42 STATISTIC(EmittedInsts, "Number of machine instrs printed");
45 struct VISIBILITY_HIDDEN ARMAsmPrinter : public AsmPrinter {
46 ARMAsmPrinter(std::ostream &O, TargetMachine &TM, const TargetAsmInfo *T)
47 : AsmPrinter(O, TM, T), DW(O, this, T), AFI(NULL), InCPMode(false) {
48 Subtarget = &TM.getSubtarget<ARMSubtarget>();
53 /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
54 /// make the right decision when printing asm code for different targets.
55 const ARMSubtarget *Subtarget;
57 /// AFI - Keep a pointer to ARMFunctionInfo for the current
61 /// We name each basic block in a Function with a unique number, so
62 /// that we can consistently refer to them later. This is cleared
63 /// at the beginning of each call to runOnMachineFunction().
65 typedef std::map<const Value *, unsigned> ValueMapTy;
66 ValueMapTy NumberForBB;
68 /// Keeps the set of GlobalValues that require non-lazy-pointers for
70 std::set<std::string> GVNonLazyPtrs;
72 /// Keeps the set of external function GlobalAddresses that the asm
73 /// printer should generate stubs for.
74 std::set<std::string> FnStubs;
76 /// True if asm printer is printing a series of CONSTPOOL_ENTRY.
79 virtual const char *getPassName() const {
80 return "ARM Assembly Printer";
83 void printOperand(const MachineInstr *MI, int opNum,
84 const char *Modifier = 0);
85 void printSOImmOperand(const MachineInstr *MI, int opNum);
86 void printSORegOperand(const MachineInstr *MI, int opNum);
87 void printAddrMode2Operand(const MachineInstr *MI, int OpNo);
88 void printAddrMode2OffsetOperand(const MachineInstr *MI, int OpNo);
89 void printAddrMode3Operand(const MachineInstr *MI, int OpNo);
90 void printAddrMode3OffsetOperand(const MachineInstr *MI, int OpNo);
91 void printAddrMode4Operand(const MachineInstr *MI, int OpNo,
92 const char *Modifier = 0);
93 void printAddrMode5Operand(const MachineInstr *MI, int OpNo,
94 const char *Modifier = 0);
95 void printAddrModePCOperand(const MachineInstr *MI, int OpNo,
96 const char *Modifier = 0);
97 void printThumbAddrModeRROperand(const MachineInstr *MI, int OpNo);
98 void printThumbAddrModeRI5Operand(const MachineInstr *MI, int OpNo,
100 void printThumbAddrModeS1Operand(const MachineInstr *MI, int OpNo);
101 void printThumbAddrModeS2Operand(const MachineInstr *MI, int OpNo);
102 void printThumbAddrModeS4Operand(const MachineInstr *MI, int OpNo);
103 void printThumbAddrModeSPOperand(const MachineInstr *MI, int OpNo);
104 void printCCOperand(const MachineInstr *MI, int opNum);
105 void printPCLabel(const MachineInstr *MI, int opNum);
106 void printRegisterList(const MachineInstr *MI, int opNum);
107 void printCPInstOperand(const MachineInstr *MI, int opNum,
108 const char *Modifier);
109 void printJTBlockOperand(const MachineInstr *MI, int opNum);
111 virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
112 unsigned AsmVariant, const char *ExtraCode);
114 bool printInstruction(const MachineInstr *MI); // autogenerated.
115 void printMachineInstruction(const MachineInstr *MI);
116 bool runOnMachineFunction(MachineFunction &F);
117 bool doInitialization(Module &M);
118 bool doFinalization(Module &M);
120 virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
121 printDataDirective(MCPV->getType());
123 ARMConstantPoolValue *ACPV = (ARMConstantPoolValue*)MCPV;
124 GlobalValue *GV = ACPV->getGV();
125 std::string Name = Mang->getValueName(GV);
126 if (ACPV->isNonLazyPointer()) {
127 GVNonLazyPtrs.insert(Name);
128 O << TAI->getPrivateGlobalPrefix() << Name << "$non_lazy_ptr";
131 if (ACPV->getPCAdjustment() != 0)
132 O << "-(" << TAI->getPrivateGlobalPrefix() << "PC"
133 << utostr(ACPV->getLabelId())
134 << "+" << (unsigned)ACPV->getPCAdjustment() << ")";
137 // If the constant pool value is a extern weak symbol, remember to emit
138 // the weak reference.
139 if (GV->hasExternalWeakLinkage())
140 ExtWeakSymbols.insert(GV);
143 void getAnalysisUsage(AnalysisUsage &AU) const {
144 AU.setPreservesAll();
145 AU.addRequired<MachineModuleInfo>();
148 } // end of anonymous namespace
150 #include "ARMGenAsmWriter.inc"
152 /// createARMCodePrinterPass - Returns a pass that prints the ARM
153 /// assembly code for a MachineFunction to the given output stream,
154 /// using the given target machine description. This should work
155 /// regardless of whether the function is in SSA form.
157 FunctionPass *llvm::createARMCodePrinterPass(std::ostream &o,
158 ARMTargetMachine &tm) {
159 return new ARMAsmPrinter(o, tm, tm.getTargetAsmInfo());
162 /// runOnMachineFunction - This uses the printInstruction()
163 /// method to print assembly for each instruction.
165 bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
166 AFI = MF.getInfo<ARMFunctionInfo>();
168 if (Subtarget->isTargetDarwin()) {
169 DW.SetModuleInfo(&getAnalysis<MachineModuleInfo>());
172 SetupMachineFunction(MF);
175 // NOTE: we don't print out constant pools here, they are handled as
179 // Print out labels for the function.
180 const Function *F = MF.getFunction();
181 switch (F->getLinkage()) {
182 default: assert(0 && "Unknown linkage type!");
183 case Function::InternalLinkage:
184 SwitchToTextSection("\t.text", F);
186 case Function::ExternalLinkage:
187 SwitchToTextSection("\t.text", F);
188 O << "\t.globl\t" << CurrentFnName << "\n";
190 case Function::WeakLinkage:
191 case Function::LinkOnceLinkage:
192 if (Subtarget->isTargetDarwin()) {
194 ".section __TEXT,__textcoal_nt,coalesced,pure_instructions", F);
195 O << "\t.globl\t" << CurrentFnName << "\n";
196 O << "\t.weak_definition\t" << CurrentFnName << "\n";
198 O << TAI->getWeakRefDirective() << CurrentFnName << "\n";
203 if (AFI->isThumbFunction()) {
205 O << "\t.code\t16\n";
206 O << "\t.thumb_func\t" << CurrentFnName << "\n";
211 O << CurrentFnName << ":\n";
212 if (Subtarget->isTargetDarwin()) {
213 // Emit pre-function debug information.
214 DW.BeginFunction(&MF);
217 // Print out code for the function.
218 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
220 // Print a label for the basic block.
221 if (I != MF.begin()) {
222 printBasicBlockLabel(I, true);
225 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
227 // Print the assembly for the instruction.
228 printMachineInstruction(II);
232 if (TAI->hasDotTypeDotSizeDirective())
233 O << "\t.size " << CurrentFnName << ", .-" << CurrentFnName << "\n";
235 if (Subtarget->isTargetDarwin()) {
236 // Emit post-function debug information.
243 void ARMAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
244 const char *Modifier) {
245 const MachineOperand &MO = MI->getOperand(opNum);
246 switch (MO.getType()) {
247 case MachineOperand::MO_Register:
248 if (MRegisterInfo::isPhysicalRegister(MO.getReg()))
249 O << TM.getRegisterInfo()->get(MO.getReg()).Name;
251 assert(0 && "not implemented");
253 case MachineOperand::MO_Immediate: {
254 if (!Modifier || strcmp(Modifier, "no_hash") != 0)
257 O << (int)MO.getImmedValue();
260 case MachineOperand::MO_MachineBasicBlock:
261 printBasicBlockLabel(MO.getMachineBasicBlock());
263 case MachineOperand::MO_GlobalAddress: {
264 bool isCallOp = Modifier && !strcmp(Modifier, "call");
265 GlobalValue *GV = MO.getGlobal();
266 std::string Name = Mang->getValueName(GV);
267 bool isExt = (GV->isDeclaration() || GV->hasWeakLinkage() ||
268 GV->hasLinkOnceLinkage());
269 if (isExt && isCallOp && Subtarget->isTargetDarwin() &&
270 TM.getRelocationModel() != Reloc::Static) {
271 O << TAI->getPrivateGlobalPrefix() << Name << "$stub";
272 FnStubs.insert(Name);
276 if (GV->hasExternalWeakLinkage())
277 ExtWeakSymbols.insert(GV);
280 case MachineOperand::MO_ExternalSymbol: {
281 bool isCallOp = Modifier && !strcmp(Modifier, "call");
282 std::string Name(TAI->getGlobalPrefix());
283 Name += MO.getSymbolName();
284 if (isCallOp && Subtarget->isTargetDarwin() &&
285 TM.getRelocationModel() != Reloc::Static) {
286 O << TAI->getPrivateGlobalPrefix() << Name << "$stub";
287 FnStubs.insert(Name);
292 case MachineOperand::MO_ConstantPoolIndex:
293 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
294 << '_' << MO.getConstantPoolIndex();
296 case MachineOperand::MO_JumpTableIndex:
297 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
298 << '_' << MO.getJumpTableIndex();
301 O << "<unknown operand type>"; abort (); break;
305 /// printSOImmOperand - SOImm is 4-bit rotate amount in bits 8-11 with 8-bit
306 /// immediate in bits 0-7.
307 void ARMAsmPrinter::printSOImmOperand(const MachineInstr *MI, int OpNum) {
308 const MachineOperand &MO = MI->getOperand(OpNum);
309 assert(MO.isImmediate() && (MO.getImmedValue() < (1 << 12)) &&
310 "Not a valid so_imm value!");
311 unsigned Imm = ARM_AM::getSOImmValImm(MO.getImmedValue());
312 unsigned Rot = ARM_AM::getSOImmValRot(MO.getImmedValue());
314 // Print low-level immediate formation info, per
315 // A5.1.3: "Data-processing operands - Immediate".
317 O << "#" << Imm << ", " << Rot;
318 // Pretty printed version.
319 O << ' ' << TAI->getCommentString() << ' ' << (int)ARM_AM::rotr32(Imm, Rot);
325 // so_reg is a 4-operand unit corresponding to register forms of the A5.1
326 // "Addressing Mode 1 - Data-processing operands" forms. This includes:
328 // REG REG 0,SH_OPC - e.g. R5, ROR R3
329 // REG 0 IMM,SH_OPC - e.g. R5, LSL #3
330 void ARMAsmPrinter::printSORegOperand(const MachineInstr *MI, int Op) {
331 const MachineOperand &MO1 = MI->getOperand(Op);
332 const MachineOperand &MO2 = MI->getOperand(Op+1);
333 const MachineOperand &MO3 = MI->getOperand(Op+2);
335 assert(MRegisterInfo::isPhysicalRegister(MO1.getReg()));
336 O << TM.getRegisterInfo()->get(MO1.getReg()).Name;
338 // Print the shift opc.
340 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO3.getImmedValue()))
344 assert(MRegisterInfo::isPhysicalRegister(MO2.getReg()));
345 O << TM.getRegisterInfo()->get(MO2.getReg()).Name;
346 assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
348 O << "#" << ARM_AM::getSORegOffset(MO3.getImm());
352 void ARMAsmPrinter::printAddrMode2Operand(const MachineInstr *MI, int Op) {
353 const MachineOperand &MO1 = MI->getOperand(Op);
354 const MachineOperand &MO2 = MI->getOperand(Op+1);
355 const MachineOperand &MO3 = MI->getOperand(Op+2);
357 if (!MO1.isRegister()) { // FIXME: This is for CP entries, but isn't right.
358 printOperand(MI, Op);
362 O << "[" << TM.getRegisterInfo()->get(MO1.getReg()).Name;
365 if (ARM_AM::getAM2Offset(MO3.getImm())) // Don't print +0.
367 << (char)ARM_AM::getAM2Op(MO3.getImm())
368 << ARM_AM::getAM2Offset(MO3.getImm());
374 << (char)ARM_AM::getAM2Op(MO3.getImm())
375 << TM.getRegisterInfo()->get(MO2.getReg()).Name;
377 if (unsigned ShImm = ARM_AM::getAM2Offset(MO3.getImm()))
379 << ARM_AM::getShiftOpcStr(ARM_AM::getAM2ShiftOpc(MO3.getImmedValue()))
384 void ARMAsmPrinter::printAddrMode2OffsetOperand(const MachineInstr *MI, int Op){
385 const MachineOperand &MO1 = MI->getOperand(Op);
386 const MachineOperand &MO2 = MI->getOperand(Op+1);
389 if (ARM_AM::getAM2Offset(MO2.getImm())) // Don't print +0.
391 << (char)ARM_AM::getAM2Op(MO2.getImm())
392 << ARM_AM::getAM2Offset(MO2.getImm());
396 O << (char)ARM_AM::getAM2Op(MO2.getImm())
397 << TM.getRegisterInfo()->get(MO1.getReg()).Name;
399 if (unsigned ShImm = ARM_AM::getAM2Offset(MO2.getImm()))
401 << ARM_AM::getShiftOpcStr(ARM_AM::getAM2ShiftOpc(MO2.getImmedValue()))
405 void ARMAsmPrinter::printAddrMode3Operand(const MachineInstr *MI, int Op) {
406 const MachineOperand &MO1 = MI->getOperand(Op);
407 const MachineOperand &MO2 = MI->getOperand(Op+1);
408 const MachineOperand &MO3 = MI->getOperand(Op+2);
410 assert(MRegisterInfo::isPhysicalRegister(MO1.getReg()));
411 O << "[" << TM.getRegisterInfo()->get(MO1.getReg()).Name;
415 << (char)ARM_AM::getAM3Op(MO3.getImm())
416 << TM.getRegisterInfo()->get(MO2.getReg()).Name
421 if (unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm()))
423 << (char)ARM_AM::getAM3Op(MO3.getImm())
428 void ARMAsmPrinter::printAddrMode3OffsetOperand(const MachineInstr *MI, int Op){
429 const MachineOperand &MO1 = MI->getOperand(Op);
430 const MachineOperand &MO2 = MI->getOperand(Op+1);
433 O << (char)ARM_AM::getAM3Op(MO2.getImm())
434 << TM.getRegisterInfo()->get(MO1.getReg()).Name;
438 unsigned ImmOffs = ARM_AM::getAM3Offset(MO2.getImm());
440 << (char)ARM_AM::getAM3Op(MO2.getImm())
444 void ARMAsmPrinter::printAddrMode4Operand(const MachineInstr *MI, int Op,
445 const char *Modifier) {
446 const MachineOperand &MO1 = MI->getOperand(Op);
447 const MachineOperand &MO2 = MI->getOperand(Op+1);
448 ARM_AM::AMSubMode Mode = ARM_AM::getAM4SubMode(MO2.getImm());
449 if (Modifier && strcmp(Modifier, "submode") == 0) {
450 if (MO1.getReg() == ARM::SP) {
451 bool isLDM = (MI->getOpcode() == ARM::LDM ||
452 MI->getOpcode() == ARM::LDM_RET);
453 O << ARM_AM::getAMSubModeAltStr(Mode, isLDM);
455 O << ARM_AM::getAMSubModeStr(Mode);
457 printOperand(MI, Op);
458 if (ARM_AM::getAM4WBFlag(MO2.getImm()))
463 void ARMAsmPrinter::printAddrMode5Operand(const MachineInstr *MI, int Op,
464 const char *Modifier) {
465 const MachineOperand &MO1 = MI->getOperand(Op);
466 const MachineOperand &MO2 = MI->getOperand(Op+1);
468 if (!MO1.isRegister()) { // FIXME: This is for CP entries, but isn't right.
469 printOperand(MI, Op);
473 assert(MRegisterInfo::isPhysicalRegister(MO1.getReg()));
475 if (Modifier && strcmp(Modifier, "submode") == 0) {
476 ARM_AM::AMSubMode Mode = ARM_AM::getAM5SubMode(MO2.getImm());
477 if (MO1.getReg() == ARM::SP) {
478 bool isFLDM = (MI->getOpcode() == ARM::FLDMD ||
479 MI->getOpcode() == ARM::FLDMS);
480 O << ARM_AM::getAMSubModeAltStr(Mode, isFLDM);
482 O << ARM_AM::getAMSubModeStr(Mode);
484 } else if (Modifier && strcmp(Modifier, "base") == 0) {
485 // Used for FSTM{D|S} and LSTM{D|S} operations.
486 O << TM.getRegisterInfo()->get(MO1.getReg()).Name;
487 if (ARM_AM::getAM5WBFlag(MO2.getImm()))
492 O << "[" << TM.getRegisterInfo()->get(MO1.getReg()).Name;
494 if (unsigned ImmOffs = ARM_AM::getAM5Offset(MO2.getImm())) {
496 << (char)ARM_AM::getAM5Op(MO2.getImm())
502 void ARMAsmPrinter::printAddrModePCOperand(const MachineInstr *MI, int Op,
503 const char *Modifier) {
504 if (Modifier && strcmp(Modifier, "label") == 0) {
505 printPCLabel(MI, Op+1);
509 const MachineOperand &MO1 = MI->getOperand(Op);
510 assert(MRegisterInfo::isPhysicalRegister(MO1.getReg()));
511 O << "[pc, +" << TM.getRegisterInfo()->get(MO1.getReg()).Name << "]";
515 ARMAsmPrinter::printThumbAddrModeRROperand(const MachineInstr *MI, int Op) {
516 const MachineOperand &MO1 = MI->getOperand(Op);
517 const MachineOperand &MO2 = MI->getOperand(Op+1);
518 O << "[" << TM.getRegisterInfo()->get(MO1.getReg()).Name;
519 O << ", " << TM.getRegisterInfo()->get(MO2.getReg()).Name << "]";
523 ARMAsmPrinter::printThumbAddrModeRI5Operand(const MachineInstr *MI, int Op,
525 const MachineOperand &MO1 = MI->getOperand(Op);
526 const MachineOperand &MO2 = MI->getOperand(Op+1);
527 const MachineOperand &MO3 = MI->getOperand(Op+2);
529 if (!MO1.isRegister()) { // FIXME: This is for CP entries, but isn't right.
530 printOperand(MI, Op);
534 O << "[" << TM.getRegisterInfo()->get(MO1.getReg()).Name;
536 O << ", " << TM.getRegisterInfo()->get(MO3.getReg()).Name;
537 else if (unsigned ImmOffs = MO2.getImm()) {
538 O << ", #" << ImmOffs;
546 ARMAsmPrinter::printThumbAddrModeS1Operand(const MachineInstr *MI, int Op) {
547 printThumbAddrModeRI5Operand(MI, Op, 1);
550 ARMAsmPrinter::printThumbAddrModeS2Operand(const MachineInstr *MI, int Op) {
551 printThumbAddrModeRI5Operand(MI, Op, 2);
554 ARMAsmPrinter::printThumbAddrModeS4Operand(const MachineInstr *MI, int Op) {
555 printThumbAddrModeRI5Operand(MI, Op, 4);
558 void ARMAsmPrinter::printThumbAddrModeSPOperand(const MachineInstr *MI,int Op) {
559 const MachineOperand &MO1 = MI->getOperand(Op);
560 const MachineOperand &MO2 = MI->getOperand(Op+1);
561 O << "[" << TM.getRegisterInfo()->get(MO1.getReg()).Name;
562 if (unsigned ImmOffs = MO2.getImm())
563 O << ", #" << ImmOffs << " * 4";
567 void ARMAsmPrinter::printCCOperand(const MachineInstr *MI, int opNum) {
568 int CC = (int)MI->getOperand(opNum).getImmedValue();
569 O << ARMCondCodeToString((ARMCC::CondCodes)CC);
572 void ARMAsmPrinter::printPCLabel(const MachineInstr *MI, int opNum) {
573 int Id = (int)MI->getOperand(opNum).getImmedValue();
574 O << TAI->getPrivateGlobalPrefix() << "PC" << Id;
577 void ARMAsmPrinter::printRegisterList(const MachineInstr *MI, int opNum) {
579 for (unsigned i = opNum, e = MI->getNumOperands(); i != e; ++i) {
581 if (i != e-1) O << ", ";
586 void ARMAsmPrinter::printCPInstOperand(const MachineInstr *MI, int OpNo,
587 const char *Modifier) {
588 assert(Modifier && "This operand only works with a modifier!");
589 // There are two aspects to a CONSTANTPOOL_ENTRY operand, the label and the
591 if (!strcmp(Modifier, "label")) {
592 unsigned ID = MI->getOperand(OpNo).getImm();
593 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
594 << '_' << ID << ":\n";
596 assert(!strcmp(Modifier, "cpentry") && "Unknown modifier for CPE");
597 unsigned CPI = MI->getOperand(OpNo).getConstantPoolIndex();
599 const MachineConstantPoolEntry &MCPE = // Chasing pointers is fun?
600 MI->getParent()->getParent()->getConstantPool()->getConstants()[CPI];
602 if (MCPE.isMachineConstantPoolEntry())
603 EmitMachineConstantPoolValue(MCPE.Val.MachineCPVal);
605 EmitGlobalConstant(MCPE.Val.ConstVal);
609 void ARMAsmPrinter::printJTBlockOperand(const MachineInstr *MI, int OpNo) {
610 const MachineOperand &MO1 = MI->getOperand(OpNo);
611 const MachineOperand &MO2 = MI->getOperand(OpNo+1); // Unique Id
612 unsigned JTI = MO1.getJumpTableIndex();
613 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
614 << '_' << JTI << '_' << MO2.getImmedValue() << ":\n";
616 const char *JTEntryDirective = TAI->getJumpTableDirective();
617 if (!JTEntryDirective)
618 JTEntryDirective = TAI->getData32bitsDirective();
620 const MachineFunction *MF = MI->getParent()->getParent();
621 MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
622 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
623 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
624 bool UseSet= TAI->getSetDirective() && TM.getRelocationModel() == Reloc::PIC_;
625 std::set<MachineBasicBlock*> JTSets;
626 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
627 MachineBasicBlock *MBB = JTBBs[i];
628 if (UseSet && JTSets.insert(MBB).second)
629 printSetLabel(JTI, MO2.getImmedValue(), MBB);
631 O << JTEntryDirective << ' ';
633 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
634 << '_' << JTI << '_' << MO2.getImmedValue()
635 << "_set_" << MBB->getNumber();
636 else if (TM.getRelocationModel() == Reloc::PIC_) {
637 printBasicBlockLabel(MBB, false, false);
638 // If the arch uses custom Jump Table directives, don't calc relative to JT
639 if (!TAI->getJumpTableDirective())
640 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
641 << getFunctionNumber() << '_' << JTI << '_' << MO2.getImmedValue();
643 printBasicBlockLabel(MBB, false, false);
650 bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
651 unsigned AsmVariant, const char *ExtraCode){
652 // Does this asm operand have a single letter operand modifier?
653 if (ExtraCode && ExtraCode[0]) {
654 if (ExtraCode[1] != 0) return true; // Unknown modifier.
656 switch (ExtraCode[0]) {
657 default: return true; // Unknown modifier.
659 if (TM.getTargetData()->isLittleEndian())
663 if (TM.getTargetData()->isBigEndian())
666 case 'H': // Write second word of DI / DF reference.
667 // Verify that this operand has two consecutive registers.
668 if (!MI->getOperand(OpNo).isRegister() ||
669 OpNo+1 == MI->getNumOperands() ||
670 !MI->getOperand(OpNo+1).isRegister())
672 ++OpNo; // Return the high-part.
676 printOperand(MI, OpNo);
680 void ARMAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
683 if (MI->getOpcode() == ARM::CONSTPOOL_ENTRY) {
684 if (!InCPMode && AFI->isThumbFunction()) {
689 if (InCPMode && AFI->isThumbFunction()) {
696 // Call the autogenerated instruction printer routines.
697 printInstruction(MI);
700 bool ARMAsmPrinter::doInitialization(Module &M) {
701 if (Subtarget->isTargetDarwin()) {
702 // Emit initial debug information.
706 return AsmPrinter::doInitialization(M);
709 bool ARMAsmPrinter::doFinalization(Module &M) {
710 const TargetData *TD = TM.getTargetData();
712 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
714 if (!I->hasInitializer()) // External global require no code
717 if (EmitSpecialLLVMGlobal(I)) {
718 if (Subtarget->isTargetDarwin() &&
719 TM.getRelocationModel() == Reloc::Static) {
720 if (I->getName() == "llvm.global_ctors")
721 O << ".reference .constructors_used\n";
722 else if (I->getName() == "llvm.global_dtors")
723 O << ".reference .destructors_used\n";
728 std::string name = Mang->getValueName(I);
729 Constant *C = I->getInitializer();
730 unsigned Size = TD->getTypeSize(C->getType());
731 unsigned Align = TD->getPreferredAlignmentLog(I);
733 if (I->hasHiddenVisibility())
734 if (const char *Directive = TAI->getHiddenDirective())
735 O << Directive << name << "\n";
736 if (Subtarget->isTargetELF())
737 O << "\t.type " << name << ",%object\n";
739 if (C->isNullValue()) {
740 if (I->hasExternalLinkage()) {
741 if (const char *Directive = TAI->getZeroFillDirective()) {
742 O << "\t.globl\t" << name << "\n";
743 O << Directive << "__DATA__, __common, " << name << ", "
744 << Size << ", " << Align << "\n";
749 if (!I->hasSection() &&
750 (I->hasInternalLinkage() || I->hasWeakLinkage() ||
751 I->hasLinkOnceLinkage())) {
752 if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
753 if (!NoZerosInBSS && TAI->getBSSSection())
754 SwitchToDataSection(TAI->getBSSSection(), I);
756 SwitchToDataSection(TAI->getDataSection(), I);
757 if (TAI->getLCOMMDirective() != NULL) {
758 if (I->hasInternalLinkage()) {
759 O << TAI->getLCOMMDirective() << name << "," << Size;
760 if (Subtarget->isTargetDarwin())
763 O << TAI->getCOMMDirective() << name << "," << Size;
765 if (I->hasInternalLinkage())
766 O << "\t.local\t" << name << "\n";
767 O << TAI->getCOMMDirective() << name << "," << Size;
768 if (TAI->getCOMMDirectiveTakesAlignment())
769 O << "," << (TAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
771 O << "\t\t" << TAI->getCommentString() << " " << I->getName() << "\n";
776 switch (I->getLinkage()) {
777 case GlobalValue::LinkOnceLinkage:
778 case GlobalValue::WeakLinkage:
779 if (Subtarget->isTargetDarwin()) {
780 O << "\t.globl " << name << "\n"
781 << "\t.weak_definition " << name << "\n";
782 SwitchToDataSection("\t.section __DATA,__const_coal,coalesced", I);
784 std::string SectionName("\t.section\t.llvm.linkonce.d." +
786 ",\"aw\",%progbits");
787 SwitchToDataSection(SectionName.c_str(), I);
788 O << "\t.weak " << name << "\n";
791 case GlobalValue::AppendingLinkage:
792 // FIXME: appending linkage variables should go into a section of
793 // their name or something. For now, just emit them as external.
794 case GlobalValue::ExternalLinkage:
795 O << "\t.globl " << name << "\n";
797 case GlobalValue::InternalLinkage: {
798 if (I->isConstant()) {
799 const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
800 if (TAI->getCStringSection() && CVA && CVA->isCString()) {
801 SwitchToDataSection(TAI->getCStringSection(), I);
805 // FIXME: special handling for ".ctors" & ".dtors" sections
806 if (I->hasSection() &&
807 (I->getSection() == ".ctors" ||
808 I->getSection() == ".dtors")) {
809 assert(!Subtarget->isTargetDarwin());
810 std::string SectionName = ".section " + I->getSection();
811 SectionName += ",\"aw\",%progbits";
812 SwitchToDataSection(SectionName.c_str());
814 if (C->isNullValue() && !NoZerosInBSS && TAI->getBSSSection())
815 SwitchToDataSection(TAI->getBSSSection(), I);
817 SwitchToDataSection(TAI->getDataSection(), I);
823 assert(0 && "Unknown linkage type!");
827 EmitAlignment(Align, I);
828 O << name << ":\t\t\t\t" << TAI->getCommentString() << " " << I->getName()
830 if (TAI->hasDotTypeDotSizeDirective())
831 O << "\t.size " << name << ", " << Size << "\n";
832 // If the initializer is a extern weak symbol, remember to emit the weak
834 if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
835 if (GV->hasExternalWeakLinkage())
836 ExtWeakSymbols.insert(GV);
838 EmitGlobalConstant(C);
842 if (Subtarget->isTargetDarwin()) {
843 SwitchToDataSection("");
845 // Output stubs for dynamically-linked functions
847 for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
849 if (TM.getRelocationModel() == Reloc::PIC_)
850 SwitchToTextSection(".section __TEXT,__picsymbolstub4,symbol_stubs,"
853 SwitchToTextSection(".section __TEXT,__symbol_stub4,symbol_stubs,"
857 O << "\t.code\t32\n";
859 O << "L" << *i << "$stub:\n";
860 O << "\t.indirect_symbol " << *i << "\n";
861 O << "\tldr ip, L" << *i << "$slp\n";
862 if (TM.getRelocationModel() == Reloc::PIC_) {
863 O << "L" << *i << "$scv:\n";
864 O << "\tadd ip, pc, ip\n";
866 O << "\tldr pc, [ip, #0]\n";
867 O << "L" << *i << "$slp:\n";
868 if (TM.getRelocationModel() == Reloc::PIC_)
869 O << "\t.long\tL" << *i << "$lazy_ptr-(L" << *i << "$scv+8)\n";
871 O << "\t.long\tL" << *i << "$lazy_ptr\n";
872 SwitchToDataSection(".lazy_symbol_pointer", 0);
873 O << "L" << *i << "$lazy_ptr:\n";
874 O << "\t.indirect_symbol " << *i << "\n";
875 O << "\t.long\tdyld_stub_binding_helper\n";
879 // Output non-lazy-pointers for external and common global variables.
880 if (GVNonLazyPtrs.begin() != GVNonLazyPtrs.end())
881 SwitchToDataSection(".non_lazy_symbol_pointer", 0);
882 for (std::set<std::string>::iterator i = GVNonLazyPtrs.begin(),
883 e = GVNonLazyPtrs.end(); i != e; ++i) {
884 O << "L" << *i << "$non_lazy_ptr:\n";
885 O << "\t.indirect_symbol " << *i << "\n";
889 // Emit initial debug information.
892 // Funny Darwin hack: This flag tells the linker that no global symbols
893 // contain code that falls through to other global symbols (e.g. the obvious
894 // implementation of multiple entry points). If this doesn't occur, the
895 // linker can safely perform dead code stripping. Since LLVM never
896 // generates code that does this, it is always safe to set.
897 O << "\t.subsections_via_symbols\n";
900 AsmPrinter::doFinalization(M);
901 return false; // success