1 //===-- ARMAsmPrinter.cpp - Print machine code to an ARM .s file ----------===//
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 GAS-format ARM assembly language.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "asm-printer"
16 #include "ARMAsmPrinter.h"
18 #include "ARMBuildAttrs.h"
19 #include "ARMConstantPoolValue.h"
20 #include "ARMMachineFunctionInfo.h"
21 #include "ARMTargetMachine.h"
22 #include "ARMTargetObjectFile.h"
23 #include "InstPrinter/ARMInstPrinter.h"
24 #include "MCTargetDesc/ARMAddressingModes.h"
25 #include "MCTargetDesc/ARMMCExpr.h"
26 #include "llvm/Constants.h"
27 #include "llvm/DebugInfo.h"
28 #include "llvm/Module.h"
29 #include "llvm/Type.h"
30 #include "llvm/Assembly/Writer.h"
31 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
32 #include "llvm/CodeGen/MachineFunctionPass.h"
33 #include "llvm/CodeGen/MachineJumpTableInfo.h"
34 #include "llvm/MC/MCAsmInfo.h"
35 #include "llvm/MC/MCAssembler.h"
36 #include "llvm/MC/MCContext.h"
37 #include "llvm/MC/MCInst.h"
38 #include "llvm/MC/MCSectionMachO.h"
39 #include "llvm/MC/MCObjectStreamer.h"
40 #include "llvm/MC/MCStreamer.h"
41 #include "llvm/MC/MCSymbol.h"
42 #include "llvm/Target/Mangler.h"
43 #include "llvm/Target/TargetData.h"
44 #include "llvm/Target/TargetMachine.h"
45 #include "llvm/ADT/SmallString.h"
46 #include "llvm/Support/CommandLine.h"
47 #include "llvm/Support/Debug.h"
48 #include "llvm/Support/ErrorHandling.h"
49 #include "llvm/Support/TargetRegistry.h"
50 #include "llvm/Support/raw_ostream.h"
56 // Per section and per symbol attributes are not supported.
57 // To implement them we would need the ability to delay this emission
58 // until the assembly file is fully parsed/generated as only then do we
59 // know the symbol and section numbers.
60 class AttributeEmitter {
62 virtual void MaybeSwitchVendor(StringRef Vendor) = 0;
63 virtual void EmitAttribute(unsigned Attribute, unsigned Value) = 0;
64 virtual void EmitTextAttribute(unsigned Attribute, StringRef String) = 0;
65 virtual void Finish() = 0;
66 virtual ~AttributeEmitter() {}
69 class AsmAttributeEmitter : public AttributeEmitter {
73 AsmAttributeEmitter(MCStreamer &Streamer_) : Streamer(Streamer_) {}
74 void MaybeSwitchVendor(StringRef Vendor) { }
76 void EmitAttribute(unsigned Attribute, unsigned Value) {
77 Streamer.EmitRawText("\t.eabi_attribute " +
78 Twine(Attribute) + ", " + Twine(Value));
81 void EmitTextAttribute(unsigned Attribute, StringRef String) {
83 default: llvm_unreachable("Unsupported Text attribute in ASM Mode");
84 case ARMBuildAttrs::CPU_name:
85 Streamer.EmitRawText(StringRef("\t.cpu ") + String.lower());
87 /* GAS requires .fpu to be emitted regardless of EABI attribute */
88 case ARMBuildAttrs::Advanced_SIMD_arch:
89 case ARMBuildAttrs::VFP_arch:
90 Streamer.EmitRawText(StringRef("\t.fpu ") + String.lower());
97 class ObjectAttributeEmitter : public AttributeEmitter {
98 // This structure holds all attributes, accounting for
99 // their string/numeric value, so we can later emmit them
100 // in declaration order, keeping all in the same vector
101 struct AttributeItemType {
109 StringRef StringValue;
112 MCObjectStreamer &Streamer;
113 StringRef CurrentVendor;
114 SmallVector<AttributeItemType, 64> Contents;
116 // Account for the ULEB/String size of each item,
117 // not just the number of items
119 // FIXME: this should be in a more generic place, but
120 // getULEBSize() is in MCAsmInfo and will be moved to MCDwarf
121 size_t getULEBSize(int Value) {
125 Size += sizeof(int8_t); // Is this really necessary?
131 ObjectAttributeEmitter(MCObjectStreamer &Streamer_) :
132 Streamer(Streamer_), CurrentVendor(""), ContentsSize(0) { }
134 void MaybeSwitchVendor(StringRef Vendor) {
135 assert(!Vendor.empty() && "Vendor cannot be empty.");
137 if (CurrentVendor.empty())
138 CurrentVendor = Vendor;
139 else if (CurrentVendor == Vendor)
144 CurrentVendor = Vendor;
146 assert(Contents.size() == 0);
149 void EmitAttribute(unsigned Attribute, unsigned Value) {
150 AttributeItemType attr = {
151 AttributeItemType::NumericAttribute,
156 ContentsSize += getULEBSize(Attribute);
157 ContentsSize += getULEBSize(Value);
158 Contents.push_back(attr);
161 void EmitTextAttribute(unsigned Attribute, StringRef String) {
162 AttributeItemType attr = {
163 AttributeItemType::TextAttribute,
168 ContentsSize += getULEBSize(Attribute);
170 ContentsSize += String.size()+1;
172 Contents.push_back(attr);
176 // Vendor size + Vendor name + '\0'
177 const size_t VendorHeaderSize = 4 + CurrentVendor.size() + 1;
180 const size_t TagHeaderSize = 1 + 4;
182 Streamer.EmitIntValue(VendorHeaderSize + TagHeaderSize + ContentsSize, 4);
183 Streamer.EmitBytes(CurrentVendor, 0);
184 Streamer.EmitIntValue(0, 1); // '\0'
186 Streamer.EmitIntValue(ARMBuildAttrs::File, 1);
187 Streamer.EmitIntValue(TagHeaderSize + ContentsSize, 4);
189 // Size should have been accounted for already, now
190 // emit each field as its type (ULEB or String)
191 for (unsigned int i=0; i<Contents.size(); ++i) {
192 AttributeItemType item = Contents[i];
193 Streamer.EmitULEB128IntValue(item.Tag, 0);
195 default: llvm_unreachable("Invalid attribute type");
196 case AttributeItemType::NumericAttribute:
197 Streamer.EmitULEB128IntValue(item.IntValue, 0);
199 case AttributeItemType::TextAttribute:
200 Streamer.EmitBytes(item.StringValue.upper(), 0);
201 Streamer.EmitIntValue(0, 1); // '\0'
210 } // end of anonymous namespace
212 MachineLocation ARMAsmPrinter::
213 getDebugValueLocation(const MachineInstr *MI) const {
214 MachineLocation Location;
215 assert(MI->getNumOperands() == 4 && "Invalid no. of machine operands!");
216 // Frame address. Currently handles register +- offset only.
217 if (MI->getOperand(0).isReg() && MI->getOperand(1).isImm())
218 Location.set(MI->getOperand(0).getReg(), MI->getOperand(1).getImm());
220 DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n");
225 /// EmitDwarfRegOp - Emit dwarf register operation.
226 void ARMAsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const {
227 const TargetRegisterInfo *RI = TM.getRegisterInfo();
228 if (RI->getDwarfRegNum(MLoc.getReg(), false) != -1)
229 AsmPrinter::EmitDwarfRegOp(MLoc);
231 unsigned Reg = MLoc.getReg();
232 if (Reg >= ARM::S0 && Reg <= ARM::S31) {
233 assert(ARM::S0 + 31 == ARM::S31 && "Unexpected ARM S register numbering");
234 // S registers are described as bit-pieces of a register
235 // S[2x] = DW_OP_regx(256 + (x>>1)) DW_OP_bit_piece(32, 0)
236 // S[2x+1] = DW_OP_regx(256 + (x>>1)) DW_OP_bit_piece(32, 32)
238 unsigned SReg = Reg - ARM::S0;
239 bool odd = SReg & 0x1;
240 unsigned Rx = 256 + (SReg >> 1);
242 OutStreamer.AddComment("DW_OP_regx for S register");
243 EmitInt8(dwarf::DW_OP_regx);
245 OutStreamer.AddComment(Twine(SReg));
249 OutStreamer.AddComment("DW_OP_bit_piece 32 32");
250 EmitInt8(dwarf::DW_OP_bit_piece);
254 OutStreamer.AddComment("DW_OP_bit_piece 32 0");
255 EmitInt8(dwarf::DW_OP_bit_piece);
259 } else if (Reg >= ARM::Q0 && Reg <= ARM::Q15) {
260 assert(ARM::Q0 + 15 == ARM::Q15 && "Unexpected ARM Q register numbering");
261 // Q registers Q0-Q15 are described by composing two D registers together.
262 // Qx = DW_OP_regx(256+2x) DW_OP_piece(8) DW_OP_regx(256+2x+1)
265 unsigned QReg = Reg - ARM::Q0;
266 unsigned D1 = 256 + 2 * QReg;
267 unsigned D2 = D1 + 1;
269 OutStreamer.AddComment("DW_OP_regx for Q register: D1");
270 EmitInt8(dwarf::DW_OP_regx);
272 OutStreamer.AddComment("DW_OP_piece 8");
273 EmitInt8(dwarf::DW_OP_piece);
276 OutStreamer.AddComment("DW_OP_regx for Q register: D2");
277 EmitInt8(dwarf::DW_OP_regx);
279 OutStreamer.AddComment("DW_OP_piece 8");
280 EmitInt8(dwarf::DW_OP_piece);
286 void ARMAsmPrinter::EmitFunctionBodyEnd() {
287 // Make sure to terminate any constant pools that were at the end
291 InConstantPool = false;
292 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
295 void ARMAsmPrinter::EmitFunctionEntryLabel() {
296 if (AFI->isThumbFunction()) {
297 OutStreamer.EmitAssemblerFlag(MCAF_Code16);
298 OutStreamer.EmitThumbFunc(CurrentFnSym);
301 OutStreamer.EmitLabel(CurrentFnSym);
304 void ARMAsmPrinter::EmitXXStructor(const Constant *CV) {
305 uint64_t Size = TM.getTargetData()->getTypeAllocSize(CV->getType());
306 assert(Size && "C++ constructor pointer had zero size!");
308 const GlobalValue *GV = dyn_cast<GlobalValue>(CV->stripPointerCasts());
309 assert(GV && "C++ constructor pointer was not a GlobalValue!");
311 const MCExpr *E = MCSymbolRefExpr::Create(Mang->getSymbol(GV),
312 (Subtarget->isTargetDarwin()
313 ? MCSymbolRefExpr::VK_None
314 : MCSymbolRefExpr::VK_ARM_TARGET1),
317 OutStreamer.EmitValue(E, Size);
320 /// runOnMachineFunction - This uses the EmitInstruction()
321 /// method to print assembly for each instruction.
323 bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
324 AFI = MF.getInfo<ARMFunctionInfo>();
325 MCP = MF.getConstantPool();
327 return AsmPrinter::runOnMachineFunction(MF);
330 void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
331 raw_ostream &O, const char *Modifier) {
332 const MachineOperand &MO = MI->getOperand(OpNum);
333 unsigned TF = MO.getTargetFlags();
335 switch (MO.getType()) {
336 default: llvm_unreachable("<unknown operand type>");
337 case MachineOperand::MO_Register: {
338 unsigned Reg = MO.getReg();
339 assert(TargetRegisterInfo::isPhysicalRegister(Reg));
340 assert(!MO.getSubReg() && "Subregs should be eliminated!");
341 O << ARMInstPrinter::getRegisterName(Reg);
344 case MachineOperand::MO_Immediate: {
345 int64_t Imm = MO.getImm();
347 if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
348 (TF == ARMII::MO_LO16))
350 else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
351 (TF == ARMII::MO_HI16))
356 case MachineOperand::MO_MachineBasicBlock:
357 O << *MO.getMBB()->getSymbol();
359 case MachineOperand::MO_GlobalAddress: {
360 const GlobalValue *GV = MO.getGlobal();
361 if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
362 (TF & ARMII::MO_LO16))
364 else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
365 (TF & ARMII::MO_HI16))
367 O << *Mang->getSymbol(GV);
369 printOffset(MO.getOffset(), O);
370 if (TF == ARMII::MO_PLT)
374 case MachineOperand::MO_ExternalSymbol: {
375 O << *GetExternalSymbolSymbol(MO.getSymbolName());
376 if (TF == ARMII::MO_PLT)
380 case MachineOperand::MO_ConstantPoolIndex:
381 O << *GetCPISymbol(MO.getIndex());
383 case MachineOperand::MO_JumpTableIndex:
384 O << *GetJTISymbol(MO.getIndex());
389 //===--------------------------------------------------------------------===//
391 MCSymbol *ARMAsmPrinter::
392 GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2,
393 const MachineBasicBlock *MBB) const {
394 SmallString<60> Name;
395 raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
396 << getFunctionNumber() << '_' << uid << '_' << uid2
397 << "_set_" << MBB->getNumber();
398 return OutContext.GetOrCreateSymbol(Name.str());
401 MCSymbol *ARMAsmPrinter::
402 GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const {
403 SmallString<60> Name;
404 raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "JTI"
405 << getFunctionNumber() << '_' << uid << '_' << uid2;
406 return OutContext.GetOrCreateSymbol(Name.str());
410 MCSymbol *ARMAsmPrinter::GetARMSJLJEHLabel(void) const {
411 SmallString<60> Name;
412 raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "SJLJEH"
413 << getFunctionNumber();
414 return OutContext.GetOrCreateSymbol(Name.str());
417 bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
418 unsigned AsmVariant, const char *ExtraCode,
420 // Does this asm operand have a single letter operand modifier?
421 if (ExtraCode && ExtraCode[0]) {
422 if (ExtraCode[1] != 0) return true; // Unknown modifier.
424 switch (ExtraCode[0]) {
426 // See if this is a generic print operand
427 return AsmPrinter::PrintAsmOperand(MI, OpNum, AsmVariant, ExtraCode, O);
428 case 'a': // Print as a memory address.
429 if (MI->getOperand(OpNum).isReg()) {
431 << ARMInstPrinter::getRegisterName(MI->getOperand(OpNum).getReg())
436 case 'c': // Don't print "#" before an immediate operand.
437 if (!MI->getOperand(OpNum).isImm())
439 O << MI->getOperand(OpNum).getImm();
441 case 'P': // Print a VFP double precision register.
442 case 'q': // Print a NEON quad precision register.
443 printOperand(MI, OpNum, O);
445 case 'y': // Print a VFP single precision register as indexed double.
446 if (MI->getOperand(OpNum).isReg()) {
447 unsigned Reg = MI->getOperand(OpNum).getReg();
448 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
449 // Find the 'd' register that has this 's' register as a sub-register,
450 // and determine the lane number.
451 for (MCSuperRegIterator SR(Reg, TRI); SR.isValid(); ++SR) {
452 if (!ARM::DPRRegClass.contains(*SR))
454 bool Lane0 = TRI->getSubReg(*SR, ARM::ssub_0) == Reg;
455 O << ARMInstPrinter::getRegisterName(*SR) << (Lane0 ? "[0]" : "[1]");
460 case 'B': // Bitwise inverse of integer or symbol without a preceding #.
461 if (!MI->getOperand(OpNum).isImm())
463 O << ~(MI->getOperand(OpNum).getImm());
465 case 'L': // The low 16 bits of an immediate constant.
466 if (!MI->getOperand(OpNum).isImm())
468 O << (MI->getOperand(OpNum).getImm() & 0xffff);
470 case 'M': { // A register range suitable for LDM/STM.
471 if (!MI->getOperand(OpNum).isReg())
473 const MachineOperand &MO = MI->getOperand(OpNum);
474 unsigned RegBegin = MO.getReg();
475 // This takes advantage of the 2 operand-ness of ldm/stm and that we've
476 // already got the operands in registers that are operands to the
477 // inline asm statement.
479 O << "{" << ARMInstPrinter::getRegisterName(RegBegin);
481 // FIXME: The register allocator not only may not have given us the
482 // registers in sequence, but may not be in ascending registers. This
483 // will require changes in the register allocator that'll need to be
484 // propagated down here if the operands change.
485 unsigned RegOps = OpNum + 1;
486 while (MI->getOperand(RegOps).isReg()) {
488 << ARMInstPrinter::getRegisterName(MI->getOperand(RegOps).getReg());
496 case 'R': // The most significant register of a pair.
497 case 'Q': { // The least significant register of a pair.
500 const MachineOperand &FlagsOP = MI->getOperand(OpNum - 1);
501 if (!FlagsOP.isImm())
503 unsigned Flags = FlagsOP.getImm();
504 unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
507 unsigned RegOp = ExtraCode[0] == 'Q' ? OpNum : OpNum + 1;
508 if (RegOp >= MI->getNumOperands())
510 const MachineOperand &MO = MI->getOperand(RegOp);
513 unsigned Reg = MO.getReg();
514 O << ARMInstPrinter::getRegisterName(Reg);
518 case 'e': // The low doubleword register of a NEON quad register.
519 case 'f': { // The high doubleword register of a NEON quad register.
520 if (!MI->getOperand(OpNum).isReg())
522 unsigned Reg = MI->getOperand(OpNum).getReg();
523 if (!ARM::QPRRegClass.contains(Reg))
525 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
526 unsigned SubReg = TRI->getSubReg(Reg, ExtraCode[0] == 'e' ?
527 ARM::dsub_0 : ARM::dsub_1);
528 O << ARMInstPrinter::getRegisterName(SubReg);
532 // These modifiers are not yet supported.
533 case 'h': // A range of VFP/NEON registers suitable for VLD1/VST1.
534 case 'H': // The highest-numbered register of a pair.
539 printOperand(MI, OpNum, O);
543 bool ARMAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
544 unsigned OpNum, unsigned AsmVariant,
545 const char *ExtraCode,
547 // Does this asm operand have a single letter operand modifier?
548 if (ExtraCode && ExtraCode[0]) {
549 if (ExtraCode[1] != 0) return true; // Unknown modifier.
551 switch (ExtraCode[0]) {
552 case 'A': // A memory operand for a VLD1/VST1 instruction.
553 default: return true; // Unknown modifier.
554 case 'm': // The base register of a memory operand.
555 if (!MI->getOperand(OpNum).isReg())
557 O << ARMInstPrinter::getRegisterName(MI->getOperand(OpNum).getReg());
562 const MachineOperand &MO = MI->getOperand(OpNum);
563 assert(MO.isReg() && "unexpected inline asm memory operand");
564 O << "[" << ARMInstPrinter::getRegisterName(MO.getReg()) << "]";
568 void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) {
569 if (Subtarget->isTargetDarwin()) {
570 Reloc::Model RelocM = TM.getRelocationModel();
571 if (RelocM == Reloc::PIC_ || RelocM == Reloc::DynamicNoPIC) {
572 // Declare all the text sections up front (before the DWARF sections
573 // emitted by AsmPrinter::doInitialization) so the assembler will keep
574 // them together at the beginning of the object file. This helps
575 // avoid out-of-range branches that are due a fundamental limitation of
576 // the way symbol offsets are encoded with the current Darwin ARM
578 const TargetLoweringObjectFileMachO &TLOFMacho =
579 static_cast<const TargetLoweringObjectFileMachO &>(
580 getObjFileLowering());
581 OutStreamer.SwitchSection(TLOFMacho.getTextSection());
582 OutStreamer.SwitchSection(TLOFMacho.getTextCoalSection());
583 OutStreamer.SwitchSection(TLOFMacho.getConstTextCoalSection());
584 if (RelocM == Reloc::DynamicNoPIC) {
585 const MCSection *sect =
586 OutContext.getMachOSection("__TEXT", "__symbol_stub4",
587 MCSectionMachO::S_SYMBOL_STUBS,
588 12, SectionKind::getText());
589 OutStreamer.SwitchSection(sect);
591 const MCSection *sect =
592 OutContext.getMachOSection("__TEXT", "__picsymbolstub4",
593 MCSectionMachO::S_SYMBOL_STUBS,
594 16, SectionKind::getText());
595 OutStreamer.SwitchSection(sect);
597 const MCSection *StaticInitSect =
598 OutContext.getMachOSection("__TEXT", "__StaticInit",
599 MCSectionMachO::S_REGULAR |
600 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
601 SectionKind::getText());
602 OutStreamer.SwitchSection(StaticInitSect);
606 // Use unified assembler syntax.
607 OutStreamer.EmitAssemblerFlag(MCAF_SyntaxUnified);
609 // Emit ARM Build Attributes
610 if (Subtarget->isTargetELF())
615 void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
616 if (Subtarget->isTargetDarwin()) {
617 // All darwin targets use mach-o.
618 const TargetLoweringObjectFileMachO &TLOFMacho =
619 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
620 MachineModuleInfoMachO &MMIMacho =
621 MMI->getObjFileInfo<MachineModuleInfoMachO>();
623 // Output non-lazy-pointers for external and common global variables.
624 MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetGVStubList();
626 if (!Stubs.empty()) {
627 // Switch with ".non_lazy_symbol_pointer" directive.
628 OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
630 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
632 OutStreamer.EmitLabel(Stubs[i].first);
633 // .indirect_symbol _foo
634 MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
635 OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),MCSA_IndirectSymbol);
638 // External to current translation unit.
639 OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
641 // Internal to current translation unit.
643 // When we place the LSDA into the TEXT section, the type info
644 // pointers need to be indirect and pc-rel. We accomplish this by
645 // using NLPs; however, sometimes the types are local to the file.
646 // We need to fill in the value for the NLP in those cases.
647 OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
649 4/*size*/, 0/*addrspace*/);
653 OutStreamer.AddBlankLine();
656 Stubs = MMIMacho.GetHiddenGVStubList();
657 if (!Stubs.empty()) {
658 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
660 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
662 OutStreamer.EmitLabel(Stubs[i].first);
664 OutStreamer.EmitValue(MCSymbolRefExpr::
665 Create(Stubs[i].second.getPointer(),
667 4/*size*/, 0/*addrspace*/);
671 OutStreamer.AddBlankLine();
674 // Funny Darwin hack: This flag tells the linker that no global symbols
675 // contain code that falls through to other global symbols (e.g. the obvious
676 // implementation of multiple entry points). If this doesn't occur, the
677 // linker can safely perform dead code stripping. Since LLVM never
678 // generates code that does this, it is always safe to set.
679 OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
683 //===----------------------------------------------------------------------===//
684 // Helper routines for EmitStartOfAsmFile() and EmitEndOfAsmFile()
686 // The following seem like one-off assembler flags, but they actually need
687 // to appear in the .ARM.attributes section in ELF.
688 // Instead of subclassing the MCELFStreamer, we do the work here.
690 void ARMAsmPrinter::emitAttributes() {
692 emitARMAttributeSection();
694 /* GAS expect .fpu to be emitted, regardless of VFP build attribute */
695 bool emitFPU = false;
696 AttributeEmitter *AttrEmitter;
697 if (OutStreamer.hasRawTextSupport()) {
698 AttrEmitter = new AsmAttributeEmitter(OutStreamer);
701 MCObjectStreamer &O = static_cast<MCObjectStreamer&>(OutStreamer);
702 AttrEmitter = new ObjectAttributeEmitter(O);
705 AttrEmitter->MaybeSwitchVendor("aeabi");
707 std::string CPUString = Subtarget->getCPUString();
709 if (CPUString == "cortex-a8" ||
710 Subtarget->isCortexA8()) {
711 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::CPU_name, "cortex-a8");
712 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v7);
713 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch_profile,
714 ARMBuildAttrs::ApplicationProfile);
715 AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
716 ARMBuildAttrs::Allowed);
717 AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
718 ARMBuildAttrs::AllowThumb32);
719 // Fixme: figure out when this is emitted.
720 //AttrEmitter->EmitAttribute(ARMBuildAttrs::WMMX_arch,
721 // ARMBuildAttrs::AllowWMMXv1);
724 /// ADD additional Else-cases here!
725 } else if (CPUString == "xscale") {
726 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v5TEJ);
727 AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
728 ARMBuildAttrs::Allowed);
729 AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
730 ARMBuildAttrs::Allowed);
731 } else if (CPUString == "generic") {
732 // FIXME: Why these defaults?
733 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v4T);
734 AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
735 ARMBuildAttrs::Allowed);
736 AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
737 ARMBuildAttrs::Allowed);
740 if (Subtarget->hasNEON() && emitFPU) {
741 /* NEON is not exactly a VFP architecture, but GAS emit one of
742 * neon/neon-vfpv4/vfpv3/vfpv2 for .fpu parameters */
743 if (Subtarget->hasVFP4())
744 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::Advanced_SIMD_arch,
747 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::Advanced_SIMD_arch, "neon");
748 /* If emitted for NEON, omit from VFP below, since you can have both
749 * NEON and VFP in build attributes but only one .fpu */
754 if (Subtarget->hasVFP4()) {
755 AttrEmitter->EmitAttribute(ARMBuildAttrs::VFP_arch,
756 ARMBuildAttrs::AllowFPv4A);
758 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::VFP_arch, "vfpv4");
761 } else if (Subtarget->hasVFP3()) {
762 AttrEmitter->EmitAttribute(ARMBuildAttrs::VFP_arch,
763 ARMBuildAttrs::AllowFPv3A);
765 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::VFP_arch, "vfpv3");
768 } else if (Subtarget->hasVFP2()) {
769 AttrEmitter->EmitAttribute(ARMBuildAttrs::VFP_arch,
770 ARMBuildAttrs::AllowFPv2);
772 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::VFP_arch, "vfpv2");
775 /* TODO: ARMBuildAttrs::Allowed is not completely accurate,
776 * since NEON can have 1 (allowed) or 2 (MAC operations) */
777 if (Subtarget->hasNEON()) {
778 AttrEmitter->EmitAttribute(ARMBuildAttrs::Advanced_SIMD_arch,
779 ARMBuildAttrs::Allowed);
782 // Signal various FP modes.
783 if (!TM.Options.UnsafeFPMath) {
784 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_denormal,
785 ARMBuildAttrs::Allowed);
786 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_exceptions,
787 ARMBuildAttrs::Allowed);
790 if (TM.Options.NoInfsFPMath && TM.Options.NoNaNsFPMath)
791 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_number_model,
792 ARMBuildAttrs::Allowed);
794 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_number_model,
795 ARMBuildAttrs::AllowIEE754);
797 // FIXME: add more flags to ARMBuildAttrs.h
798 // 8-bytes alignment stuff.
799 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_align8_needed, 1);
800 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_align8_preserved, 1);
802 // Hard float. Use both S and D registers and conform to AAPCS-VFP.
803 if (Subtarget->isAAPCS_ABI() && TM.Options.FloatABIType == FloatABI::Hard) {
804 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_HardFP_use, 3);
805 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_VFP_args, 1);
807 // FIXME: Should we signal R9 usage?
809 if (Subtarget->hasDivide())
810 AttrEmitter->EmitAttribute(ARMBuildAttrs::DIV_use, 1);
812 AttrEmitter->Finish();
816 void ARMAsmPrinter::emitARMAttributeSection() {
818 // [ <section-length> "vendor-name"
819 // [ <file-tag> <size> <attribute>*
820 // | <section-tag> <size> <section-number>* 0 <attribute>*
821 // | <symbol-tag> <size> <symbol-number>* 0 <attribute>*
825 if (OutStreamer.hasRawTextSupport())
828 const ARMElfTargetObjectFile &TLOFELF =
829 static_cast<const ARMElfTargetObjectFile &>
830 (getObjFileLowering());
832 OutStreamer.SwitchSection(TLOFELF.getAttributesSection());
835 OutStreamer.EmitIntValue(0x41, 1);
838 //===----------------------------------------------------------------------===//
840 static MCSymbol *getPICLabel(const char *Prefix, unsigned FunctionNumber,
841 unsigned LabelId, MCContext &Ctx) {
843 MCSymbol *Label = Ctx.GetOrCreateSymbol(Twine(Prefix)
844 + "PC" + Twine(FunctionNumber) + "_" + Twine(LabelId));
848 static MCSymbolRefExpr::VariantKind
849 getModifierVariantKind(ARMCP::ARMCPModifier Modifier) {
851 case ARMCP::no_modifier: return MCSymbolRefExpr::VK_None;
852 case ARMCP::TLSGD: return MCSymbolRefExpr::VK_ARM_TLSGD;
853 case ARMCP::TPOFF: return MCSymbolRefExpr::VK_ARM_TPOFF;
854 case ARMCP::GOTTPOFF: return MCSymbolRefExpr::VK_ARM_GOTTPOFF;
855 case ARMCP::GOT: return MCSymbolRefExpr::VK_ARM_GOT;
856 case ARMCP::GOTOFF: return MCSymbolRefExpr::VK_ARM_GOTOFF;
858 llvm_unreachable("Invalid ARMCPModifier!");
861 MCSymbol *ARMAsmPrinter::GetARMGVSymbol(const GlobalValue *GV) {
862 bool isIndirect = Subtarget->isTargetDarwin() &&
863 Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
865 return Mang->getSymbol(GV);
867 // FIXME: Remove this when Darwin transition to @GOT like syntax.
868 MCSymbol *MCSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
869 MachineModuleInfoMachO &MMIMachO =
870 MMI->getObjFileInfo<MachineModuleInfoMachO>();
871 MachineModuleInfoImpl::StubValueTy &StubSym =
872 GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(MCSym) :
873 MMIMachO.getGVStubEntry(MCSym);
874 if (StubSym.getPointer() == 0)
875 StubSym = MachineModuleInfoImpl::
876 StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
881 EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
882 int Size = TM.getTargetData()->getTypeAllocSize(MCPV->getType());
884 ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
887 if (ACPV->isLSDA()) {
888 SmallString<128> Str;
889 raw_svector_ostream OS(Str);
890 OS << MAI->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
891 MCSym = OutContext.GetOrCreateSymbol(OS.str());
892 } else if (ACPV->isBlockAddress()) {
893 const BlockAddress *BA =
894 cast<ARMConstantPoolConstant>(ACPV)->getBlockAddress();
895 MCSym = GetBlockAddressSymbol(BA);
896 } else if (ACPV->isGlobalValue()) {
897 const GlobalValue *GV = cast<ARMConstantPoolConstant>(ACPV)->getGV();
898 MCSym = GetARMGVSymbol(GV);
899 } else if (ACPV->isMachineBasicBlock()) {
900 const MachineBasicBlock *MBB = cast<ARMConstantPoolMBB>(ACPV)->getMBB();
901 MCSym = MBB->getSymbol();
903 assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
904 const char *Sym = cast<ARMConstantPoolSymbol>(ACPV)->getSymbol();
905 MCSym = GetExternalSymbolSymbol(Sym);
908 // Create an MCSymbol for the reference.
910 MCSymbolRefExpr::Create(MCSym, getModifierVariantKind(ACPV->getModifier()),
913 if (ACPV->getPCAdjustment()) {
914 MCSymbol *PCLabel = getPICLabel(MAI->getPrivateGlobalPrefix(),
918 const MCExpr *PCRelExpr = MCSymbolRefExpr::Create(PCLabel, OutContext);
920 MCBinaryExpr::CreateAdd(PCRelExpr,
921 MCConstantExpr::Create(ACPV->getPCAdjustment(),
924 if (ACPV->mustAddCurrentAddress()) {
925 // We want "(<expr> - .)", but MC doesn't have a concept of the '.'
926 // label, so just emit a local label end reference that instead.
927 MCSymbol *DotSym = OutContext.CreateTempSymbol();
928 OutStreamer.EmitLabel(DotSym);
929 const MCExpr *DotExpr = MCSymbolRefExpr::Create(DotSym, OutContext);
930 PCRelExpr = MCBinaryExpr::CreateSub(PCRelExpr, DotExpr, OutContext);
932 Expr = MCBinaryExpr::CreateSub(Expr, PCRelExpr, OutContext);
934 OutStreamer.EmitValue(Expr, Size);
937 void ARMAsmPrinter::EmitJumpTable(const MachineInstr *MI) {
938 unsigned Opcode = MI->getOpcode();
940 if (Opcode == ARM::BR_JTadd)
942 else if (Opcode == ARM::BR_JTm)
945 const MachineOperand &MO1 = MI->getOperand(OpNum);
946 const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
947 unsigned JTI = MO1.getIndex();
949 // Emit a label for the jump table.
950 MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
951 OutStreamer.EmitLabel(JTISymbol);
953 // Mark the jump table as data-in-code.
954 OutStreamer.EmitDataRegion(MCDR_DataRegionJT32);
956 // Emit each entry of the table.
957 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
958 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
959 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
961 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
962 MachineBasicBlock *MBB = JTBBs[i];
963 // Construct an MCExpr for the entry. We want a value of the form:
964 // (BasicBlockAddr - TableBeginAddr)
966 // For example, a table with entries jumping to basic blocks BB0 and BB1
969 // .word (LBB0 - LJTI_0_0)
970 // .word (LBB1 - LJTI_0_0)
971 const MCExpr *Expr = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
973 if (TM.getRelocationModel() == Reloc::PIC_)
974 Expr = MCBinaryExpr::CreateSub(Expr, MCSymbolRefExpr::Create(JTISymbol,
977 // If we're generating a table of Thumb addresses in static relocation
978 // model, we need to add one to keep interworking correctly.
979 else if (AFI->isThumbFunction())
980 Expr = MCBinaryExpr::CreateAdd(Expr, MCConstantExpr::Create(1,OutContext),
982 OutStreamer.EmitValue(Expr, 4);
984 // Mark the end of jump table data-in-code region.
985 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
988 void ARMAsmPrinter::EmitJump2Table(const MachineInstr *MI) {
989 unsigned Opcode = MI->getOpcode();
990 int OpNum = (Opcode == ARM::t2BR_JT) ? 2 : 1;
991 const MachineOperand &MO1 = MI->getOperand(OpNum);
992 const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
993 unsigned JTI = MO1.getIndex();
995 MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
996 OutStreamer.EmitLabel(JTISymbol);
998 // Emit each entry of the table.
999 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
1000 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
1001 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
1002 unsigned OffsetWidth = 4;
1003 if (MI->getOpcode() == ARM::t2TBB_JT) {
1005 // Mark the jump table as data-in-code.
1006 OutStreamer.EmitDataRegion(MCDR_DataRegionJT8);
1007 } else if (MI->getOpcode() == ARM::t2TBH_JT) {
1009 // Mark the jump table as data-in-code.
1010 OutStreamer.EmitDataRegion(MCDR_DataRegionJT16);
1013 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
1014 MachineBasicBlock *MBB = JTBBs[i];
1015 const MCExpr *MBBSymbolExpr = MCSymbolRefExpr::Create(MBB->getSymbol(),
1017 // If this isn't a TBB or TBH, the entries are direct branch instructions.
1018 if (OffsetWidth == 4) {
1020 BrInst.setOpcode(ARM::t2B);
1021 BrInst.addOperand(MCOperand::CreateExpr(MBBSymbolExpr));
1022 BrInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1023 BrInst.addOperand(MCOperand::CreateReg(0));
1024 OutStreamer.EmitInstruction(BrInst);
1027 // Otherwise it's an offset from the dispatch instruction. Construct an
1028 // MCExpr for the entry. We want a value of the form:
1029 // (BasicBlockAddr - TableBeginAddr) / 2
1031 // For example, a TBB table with entries jumping to basic blocks BB0 and BB1
1034 // .byte (LBB0 - LJTI_0_0) / 2
1035 // .byte (LBB1 - LJTI_0_0) / 2
1036 const MCExpr *Expr =
1037 MCBinaryExpr::CreateSub(MBBSymbolExpr,
1038 MCSymbolRefExpr::Create(JTISymbol, OutContext),
1040 Expr = MCBinaryExpr::CreateDiv(Expr, MCConstantExpr::Create(2, OutContext),
1042 OutStreamer.EmitValue(Expr, OffsetWidth);
1044 // Mark the end of jump table data-in-code region. 32-bit offsets use
1045 // actual branch instructions here, so we don't mark those as a data-region
1047 if (OffsetWidth != 4)
1048 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
1051 void ARMAsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
1053 unsigned NOps = MI->getNumOperands();
1055 OS << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
1056 // cast away const; DIetc do not take const operands for some reason.
1057 DIVariable V(const_cast<MDNode *>(MI->getOperand(NOps-1).getMetadata()));
1060 // Frame address. Currently handles register +- offset only.
1061 assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm());
1062 OS << '['; printOperand(MI, 0, OS); OS << '+'; printOperand(MI, 1, OS);
1065 printOperand(MI, NOps-2, OS);
1068 static void populateADROperands(MCInst &Inst, unsigned Dest,
1069 const MCSymbol *Label,
1070 unsigned pred, unsigned ccreg,
1072 const MCExpr *SymbolExpr = MCSymbolRefExpr::Create(Label, Ctx);
1073 Inst.addOperand(MCOperand::CreateReg(Dest));
1074 Inst.addOperand(MCOperand::CreateExpr(SymbolExpr));
1075 // Add predicate operands.
1076 Inst.addOperand(MCOperand::CreateImm(pred));
1077 Inst.addOperand(MCOperand::CreateReg(ccreg));
1080 void ARMAsmPrinter::EmitPatchedInstruction(const MachineInstr *MI,
1084 // Emit the instruction as usual, just patch the opcode.
1085 LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
1086 TmpInst.setOpcode(Opcode);
1087 OutStreamer.EmitInstruction(TmpInst);
1090 void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
1091 assert(MI->getFlag(MachineInstr::FrameSetup) &&
1092 "Only instruction which are involved into frame setup code are allowed");
1094 const MachineFunction &MF = *MI->getParent()->getParent();
1095 const TargetRegisterInfo *RegInfo = MF.getTarget().getRegisterInfo();
1096 const ARMFunctionInfo &AFI = *MF.getInfo<ARMFunctionInfo>();
1098 unsigned FramePtr = RegInfo->getFrameRegister(MF);
1099 unsigned Opc = MI->getOpcode();
1100 unsigned SrcReg, DstReg;
1102 if (Opc == ARM::tPUSH || Opc == ARM::tLDRpci) {
1103 // Two special cases:
1104 // 1) tPUSH does not have src/dst regs.
1105 // 2) for Thumb1 code we sometimes materialize the constant via constpool
1106 // load. Yes, this is pretty fragile, but for now I don't see better
1108 SrcReg = DstReg = ARM::SP;
1110 SrcReg = MI->getOperand(1).getReg();
1111 DstReg = MI->getOperand(0).getReg();
1114 // Try to figure out the unwinding opcode out of src / dst regs.
1115 if (MI->mayStore()) {
1117 assert(DstReg == ARM::SP &&
1118 "Only stack pointer as a destination reg is supported");
1120 SmallVector<unsigned, 4> RegList;
1121 // Skip src & dst reg, and pred ops.
1122 unsigned StartOp = 2 + 2;
1123 // Use all the operands.
1124 unsigned NumOffset = 0;
1129 llvm_unreachable("Unsupported opcode for unwinding information");
1131 // Special case here: no src & dst reg, but two extra imp ops.
1132 StartOp = 2; NumOffset = 2;
1133 case ARM::STMDB_UPD:
1134 case ARM::t2STMDB_UPD:
1135 case ARM::VSTMDDB_UPD:
1136 assert(SrcReg == ARM::SP &&
1137 "Only stack pointer as a source reg is supported");
1138 for (unsigned i = StartOp, NumOps = MI->getNumOperands() - NumOffset;
1140 const MachineOperand &MO = MI->getOperand(i);
1141 // Actually, there should never be any impdef stuff here. Skip it
1142 // temporary to workaround PR11902.
1143 if (MO.isImplicit())
1145 RegList.push_back(MO.getReg());
1148 case ARM::STR_PRE_IMM:
1149 case ARM::STR_PRE_REG:
1150 case ARM::t2STR_PRE:
1151 assert(MI->getOperand(2).getReg() == ARM::SP &&
1152 "Only stack pointer as a source reg is supported");
1153 RegList.push_back(SrcReg);
1156 OutStreamer.EmitRegSave(RegList, Opc == ARM::VSTMDDB_UPD);
1158 // Changes of stack / frame pointer.
1159 if (SrcReg == ARM::SP) {
1164 llvm_unreachable("Unsupported opcode for unwinding information");
1170 Offset = -MI->getOperand(2).getImm();
1174 Offset = MI->getOperand(2).getImm();
1177 Offset = MI->getOperand(2).getImm()*4;
1181 Offset = -MI->getOperand(2).getImm()*4;
1183 case ARM::tLDRpci: {
1184 // Grab the constpool index and check, whether it corresponds to
1185 // original or cloned constpool entry.
1186 unsigned CPI = MI->getOperand(1).getIndex();
1187 const MachineConstantPool *MCP = MF.getConstantPool();
1188 if (CPI >= MCP->getConstants().size())
1189 CPI = AFI.getOriginalCPIdx(CPI);
1190 assert(CPI != -1U && "Invalid constpool index");
1192 // Derive the actual offset.
1193 const MachineConstantPoolEntry &CPE = MCP->getConstants()[CPI];
1194 assert(!CPE.isMachineConstantPoolEntry() && "Invalid constpool entry");
1195 // FIXME: Check for user, it should be "add" instruction!
1196 Offset = -cast<ConstantInt>(CPE.Val.ConstVal)->getSExtValue();
1201 if (DstReg == FramePtr && FramePtr != ARM::SP)
1202 // Set-up of the frame pointer. Positive values correspond to "add"
1204 OutStreamer.EmitSetFP(FramePtr, ARM::SP, -Offset);
1205 else if (DstReg == ARM::SP) {
1206 // Change of SP by an offset. Positive values correspond to "sub"
1208 OutStreamer.EmitPad(Offset);
1211 llvm_unreachable("Unsupported opcode for unwinding information");
1213 } else if (DstReg == ARM::SP) {
1214 // FIXME: .movsp goes here
1216 llvm_unreachable("Unsupported opcode for unwinding information");
1220 llvm_unreachable("Unsupported opcode for unwinding information");
1225 extern cl::opt<bool> EnableARMEHABI;
1227 // Simple pseudo-instructions have their lowering (with expansion to real
1228 // instructions) auto-generated.
1229 #include "ARMGenMCPseudoLowering.inc"
1231 void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
1232 // If we just ended a constant pool, mark it as such.
1233 if (InConstantPool && MI->getOpcode() != ARM::CONSTPOOL_ENTRY) {
1234 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
1235 InConstantPool = false;
1238 // Emit unwinding stuff for frame-related instructions
1239 if (EnableARMEHABI && MI->getFlag(MachineInstr::FrameSetup))
1240 EmitUnwindingInstruction(MI);
1242 // Do any auto-generated pseudo lowerings.
1243 if (emitPseudoExpansionLowering(OutStreamer, MI))
1246 assert(!convertAddSubFlagsOpcode(MI->getOpcode()) &&
1247 "Pseudo flag setting opcode should be expanded early");
1249 // Check for manual lowerings.
1250 unsigned Opc = MI->getOpcode();
1252 case ARM::t2MOVi32imm: llvm_unreachable("Should be lowered by thumb2it pass");
1253 case ARM::DBG_VALUE: {
1254 if (isVerbose() && OutStreamer.hasRawTextSupport()) {
1255 SmallString<128> TmpStr;
1256 raw_svector_ostream OS(TmpStr);
1257 PrintDebugValueComment(MI, OS);
1258 OutStreamer.EmitRawText(StringRef(OS.str()));
1263 case ARM::tLEApcrel:
1264 case ARM::t2LEApcrel: {
1265 // FIXME: Need to also handle globals and externals
1267 TmpInst.setOpcode(MI->getOpcode() == ARM::t2LEApcrel ? ARM::t2ADR
1268 : (MI->getOpcode() == ARM::tLEApcrel ? ARM::tADR
1270 populateADROperands(TmpInst, MI->getOperand(0).getReg(),
1271 GetCPISymbol(MI->getOperand(1).getIndex()),
1272 MI->getOperand(2).getImm(), MI->getOperand(3).getReg(),
1274 OutStreamer.EmitInstruction(TmpInst);
1277 case ARM::LEApcrelJT:
1278 case ARM::tLEApcrelJT:
1279 case ARM::t2LEApcrelJT: {
1281 TmpInst.setOpcode(MI->getOpcode() == ARM::t2LEApcrelJT ? ARM::t2ADR
1282 : (MI->getOpcode() == ARM::tLEApcrelJT ? ARM::tADR
1284 populateADROperands(TmpInst, MI->getOperand(0).getReg(),
1285 GetARMJTIPICJumpTableLabel2(MI->getOperand(1).getIndex(),
1286 MI->getOperand(2).getImm()),
1287 MI->getOperand(3).getImm(), MI->getOperand(4).getReg(),
1289 OutStreamer.EmitInstruction(TmpInst);
1292 // Darwin call instructions are just normal call instructions with different
1293 // clobber semantics (they clobber R9).
1294 case ARM::BX_CALL: {
1297 TmpInst.setOpcode(ARM::MOVr);
1298 TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
1299 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1300 // Add predicate operands.
1301 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1302 TmpInst.addOperand(MCOperand::CreateReg(0));
1303 // Add 's' bit operand (always reg0 for this)
1304 TmpInst.addOperand(MCOperand::CreateReg(0));
1305 OutStreamer.EmitInstruction(TmpInst);
1309 TmpInst.setOpcode(ARM::BX);
1310 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1311 OutStreamer.EmitInstruction(TmpInst);
1315 case ARM::tBX_CALL: {
1318 TmpInst.setOpcode(ARM::tMOVr);
1319 TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
1320 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1321 // Add predicate operands.
1322 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1323 TmpInst.addOperand(MCOperand::CreateReg(0));
1324 OutStreamer.EmitInstruction(TmpInst);
1328 TmpInst.setOpcode(ARM::tBX);
1329 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1330 // Add predicate operands.
1331 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1332 TmpInst.addOperand(MCOperand::CreateReg(0));
1333 OutStreamer.EmitInstruction(TmpInst);
1337 case ARM::BMOVPCRX_CALL: {
1340 TmpInst.setOpcode(ARM::MOVr);
1341 TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
1342 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1343 // Add predicate operands.
1344 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1345 TmpInst.addOperand(MCOperand::CreateReg(0));
1346 // Add 's' bit operand (always reg0 for this)
1347 TmpInst.addOperand(MCOperand::CreateReg(0));
1348 OutStreamer.EmitInstruction(TmpInst);
1352 TmpInst.setOpcode(ARM::MOVr);
1353 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1354 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1355 // Add predicate operands.
1356 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1357 TmpInst.addOperand(MCOperand::CreateReg(0));
1358 // Add 's' bit operand (always reg0 for this)
1359 TmpInst.addOperand(MCOperand::CreateReg(0));
1360 OutStreamer.EmitInstruction(TmpInst);
1364 case ARM::BMOVPCB_CALL: {
1367 TmpInst.setOpcode(ARM::MOVr);
1368 TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
1369 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1370 // Add predicate operands.
1371 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1372 TmpInst.addOperand(MCOperand::CreateReg(0));
1373 // Add 's' bit operand (always reg0 for this)
1374 TmpInst.addOperand(MCOperand::CreateReg(0));
1375 OutStreamer.EmitInstruction(TmpInst);
1379 TmpInst.setOpcode(ARM::Bcc);
1380 const GlobalValue *GV = MI->getOperand(0).getGlobal();
1381 MCSymbol *GVSym = Mang->getSymbol(GV);
1382 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1383 TmpInst.addOperand(MCOperand::CreateExpr(GVSymExpr));
1384 // Add predicate operands.
1385 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1386 TmpInst.addOperand(MCOperand::CreateReg(0));
1387 OutStreamer.EmitInstruction(TmpInst);
1391 case ARM::t2BMOVPCB_CALL: {
1394 TmpInst.setOpcode(ARM::tMOVr);
1395 TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
1396 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1397 // Add predicate operands.
1398 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1399 TmpInst.addOperand(MCOperand::CreateReg(0));
1400 OutStreamer.EmitInstruction(TmpInst);
1404 TmpInst.setOpcode(ARM::t2B);
1405 const GlobalValue *GV = MI->getOperand(0).getGlobal();
1406 MCSymbol *GVSym = Mang->getSymbol(GV);
1407 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1408 TmpInst.addOperand(MCOperand::CreateExpr(GVSymExpr));
1409 // Add predicate operands.
1410 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1411 TmpInst.addOperand(MCOperand::CreateReg(0));
1412 OutStreamer.EmitInstruction(TmpInst);
1416 case ARM::MOVi16_ga_pcrel:
1417 case ARM::t2MOVi16_ga_pcrel: {
1419 TmpInst.setOpcode(Opc == ARM::MOVi16_ga_pcrel? ARM::MOVi16 : ARM::t2MOVi16);
1420 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1422 unsigned TF = MI->getOperand(1).getTargetFlags();
1423 bool isPIC = TF == ARMII::MO_LO16_NONLAZY_PIC;
1424 const GlobalValue *GV = MI->getOperand(1).getGlobal();
1425 MCSymbol *GVSym = GetARMGVSymbol(GV);
1426 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1428 MCSymbol *LabelSym = getPICLabel(MAI->getPrivateGlobalPrefix(),
1429 getFunctionNumber(),
1430 MI->getOperand(2).getImm(), OutContext);
1431 const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
1432 unsigned PCAdj = (Opc == ARM::MOVi16_ga_pcrel) ? 8 : 4;
1433 const MCExpr *PCRelExpr =
1434 ARMMCExpr::CreateLower16(MCBinaryExpr::CreateSub(GVSymExpr,
1435 MCBinaryExpr::CreateAdd(LabelSymExpr,
1436 MCConstantExpr::Create(PCAdj, OutContext),
1437 OutContext), OutContext), OutContext);
1438 TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
1440 const MCExpr *RefExpr= ARMMCExpr::CreateLower16(GVSymExpr, OutContext);
1441 TmpInst.addOperand(MCOperand::CreateExpr(RefExpr));
1444 // Add predicate operands.
1445 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1446 TmpInst.addOperand(MCOperand::CreateReg(0));
1447 // Add 's' bit operand (always reg0 for this)
1448 TmpInst.addOperand(MCOperand::CreateReg(0));
1449 OutStreamer.EmitInstruction(TmpInst);
1452 case ARM::MOVTi16_ga_pcrel:
1453 case ARM::t2MOVTi16_ga_pcrel: {
1455 TmpInst.setOpcode(Opc == ARM::MOVTi16_ga_pcrel
1456 ? ARM::MOVTi16 : ARM::t2MOVTi16);
1457 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1458 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1460 unsigned TF = MI->getOperand(2).getTargetFlags();
1461 bool isPIC = TF == ARMII::MO_HI16_NONLAZY_PIC;
1462 const GlobalValue *GV = MI->getOperand(2).getGlobal();
1463 MCSymbol *GVSym = GetARMGVSymbol(GV);
1464 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1466 MCSymbol *LabelSym = getPICLabel(MAI->getPrivateGlobalPrefix(),
1467 getFunctionNumber(),
1468 MI->getOperand(3).getImm(), OutContext);
1469 const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
1470 unsigned PCAdj = (Opc == ARM::MOVTi16_ga_pcrel) ? 8 : 4;
1471 const MCExpr *PCRelExpr =
1472 ARMMCExpr::CreateUpper16(MCBinaryExpr::CreateSub(GVSymExpr,
1473 MCBinaryExpr::CreateAdd(LabelSymExpr,
1474 MCConstantExpr::Create(PCAdj, OutContext),
1475 OutContext), OutContext), OutContext);
1476 TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
1478 const MCExpr *RefExpr= ARMMCExpr::CreateUpper16(GVSymExpr, OutContext);
1479 TmpInst.addOperand(MCOperand::CreateExpr(RefExpr));
1481 // Add predicate operands.
1482 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1483 TmpInst.addOperand(MCOperand::CreateReg(0));
1484 // Add 's' bit operand (always reg0 for this)
1485 TmpInst.addOperand(MCOperand::CreateReg(0));
1486 OutStreamer.EmitInstruction(TmpInst);
1489 case ARM::tPICADD: {
1490 // This is a pseudo op for a label + instruction sequence, which looks like:
1493 // This adds the address of LPC0 to r0.
1496 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1497 getFunctionNumber(), MI->getOperand(2).getImm(),
1500 // Form and emit the add.
1502 AddInst.setOpcode(ARM::tADDhirr);
1503 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1504 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1505 AddInst.addOperand(MCOperand::CreateReg(ARM::PC));
1506 // Add predicate operands.
1507 AddInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1508 AddInst.addOperand(MCOperand::CreateReg(0));
1509 OutStreamer.EmitInstruction(AddInst);
1513 // This is a pseudo op for a label + instruction sequence, which looks like:
1516 // This adds the address of LPC0 to r0.
1519 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1520 getFunctionNumber(), MI->getOperand(2).getImm(),
1523 // Form and emit the add.
1525 AddInst.setOpcode(ARM::ADDrr);
1526 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1527 AddInst.addOperand(MCOperand::CreateReg(ARM::PC));
1528 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1529 // Add predicate operands.
1530 AddInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
1531 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(4).getReg()));
1532 // Add 's' bit operand (always reg0 for this)
1533 AddInst.addOperand(MCOperand::CreateReg(0));
1534 OutStreamer.EmitInstruction(AddInst);
1544 case ARM::PICLDRSH: {
1545 // This is a pseudo op for a label + instruction sequence, which looks like:
1548 // The LCP0 label is referenced by a constant pool entry in order to get
1549 // a PC-relative address at the ldr instruction.
1552 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1553 getFunctionNumber(), MI->getOperand(2).getImm(),
1556 // Form and emit the load
1558 switch (MI->getOpcode()) {
1560 llvm_unreachable("Unexpected opcode!");
1561 case ARM::PICSTR: Opcode = ARM::STRrs; break;
1562 case ARM::PICSTRB: Opcode = ARM::STRBrs; break;
1563 case ARM::PICSTRH: Opcode = ARM::STRH; break;
1564 case ARM::PICLDR: Opcode = ARM::LDRrs; break;
1565 case ARM::PICLDRB: Opcode = ARM::LDRBrs; break;
1566 case ARM::PICLDRH: Opcode = ARM::LDRH; break;
1567 case ARM::PICLDRSB: Opcode = ARM::LDRSB; break;
1568 case ARM::PICLDRSH: Opcode = ARM::LDRSH; break;
1571 LdStInst.setOpcode(Opcode);
1572 LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1573 LdStInst.addOperand(MCOperand::CreateReg(ARM::PC));
1574 LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1575 LdStInst.addOperand(MCOperand::CreateImm(0));
1576 // Add predicate operands.
1577 LdStInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
1578 LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(4).getReg()));
1579 OutStreamer.EmitInstruction(LdStInst);
1583 case ARM::CONSTPOOL_ENTRY: {
1584 /// CONSTPOOL_ENTRY - This instruction represents a floating constant pool
1585 /// in the function. The first operand is the ID# for this instruction, the
1586 /// second is the index into the MachineConstantPool that this is, the third
1587 /// is the size in bytes of this constant pool entry.
1588 /// The required alignment is specified on the basic block holding this MI.
1589 unsigned LabelId = (unsigned)MI->getOperand(0).getImm();
1590 unsigned CPIdx = (unsigned)MI->getOperand(1).getIndex();
1592 // If this is the first entry of the pool, mark it.
1593 if (!InConstantPool) {
1594 OutStreamer.EmitDataRegion(MCDR_DataRegion);
1595 InConstantPool = true;
1598 OutStreamer.EmitLabel(GetCPISymbol(LabelId));
1600 const MachineConstantPoolEntry &MCPE = MCP->getConstants()[CPIdx];
1601 if (MCPE.isMachineConstantPoolEntry())
1602 EmitMachineConstantPoolValue(MCPE.Val.MachineCPVal);
1604 EmitGlobalConstant(MCPE.Val.ConstVal);
1607 case ARM::t2BR_JT: {
1608 // Lower and emit the instruction itself, then the jump table following it.
1610 TmpInst.setOpcode(ARM::tMOVr);
1611 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1612 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1613 // Add predicate operands.
1614 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1615 TmpInst.addOperand(MCOperand::CreateReg(0));
1616 OutStreamer.EmitInstruction(TmpInst);
1617 // Output the data for the jump table itself
1621 case ARM::t2TBB_JT: {
1622 // Lower and emit the instruction itself, then the jump table following it.
1625 TmpInst.setOpcode(ARM::t2TBB);
1626 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1627 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1628 // Add predicate operands.
1629 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1630 TmpInst.addOperand(MCOperand::CreateReg(0));
1631 OutStreamer.EmitInstruction(TmpInst);
1632 // Output the data for the jump table itself
1634 // Make sure the next instruction is 2-byte aligned.
1638 case ARM::t2TBH_JT: {
1639 // Lower and emit the instruction itself, then the jump table following it.
1642 TmpInst.setOpcode(ARM::t2TBH);
1643 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1644 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1645 // Add predicate operands.
1646 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1647 TmpInst.addOperand(MCOperand::CreateReg(0));
1648 OutStreamer.EmitInstruction(TmpInst);
1649 // Output the data for the jump table itself
1655 // Lower and emit the instruction itself, then the jump table following it.
1658 unsigned Opc = MI->getOpcode() == ARM::BR_JTr ?
1659 ARM::MOVr : ARM::tMOVr;
1660 TmpInst.setOpcode(Opc);
1661 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1662 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1663 // Add predicate operands.
1664 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1665 TmpInst.addOperand(MCOperand::CreateReg(0));
1666 // Add 's' bit operand (always reg0 for this)
1667 if (Opc == ARM::MOVr)
1668 TmpInst.addOperand(MCOperand::CreateReg(0));
1669 OutStreamer.EmitInstruction(TmpInst);
1671 // Make sure the Thumb jump table is 4-byte aligned.
1672 if (Opc == ARM::tMOVr)
1675 // Output the data for the jump table itself
1680 // Lower and emit the instruction itself, then the jump table following it.
1683 if (MI->getOperand(1).getReg() == 0) {
1685 TmpInst.setOpcode(ARM::LDRi12);
1686 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1687 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1688 TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(2).getImm()));
1690 TmpInst.setOpcode(ARM::LDRrs);
1691 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1692 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1693 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1694 TmpInst.addOperand(MCOperand::CreateImm(0));
1696 // Add predicate operands.
1697 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1698 TmpInst.addOperand(MCOperand::CreateReg(0));
1699 OutStreamer.EmitInstruction(TmpInst);
1701 // Output the data for the jump table itself
1705 case ARM::BR_JTadd: {
1706 // Lower and emit the instruction itself, then the jump table following it.
1707 // add pc, target, idx
1709 TmpInst.setOpcode(ARM::ADDrr);
1710 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1711 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1712 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1713 // Add predicate operands.
1714 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1715 TmpInst.addOperand(MCOperand::CreateReg(0));
1716 // Add 's' bit operand (always reg0 for this)
1717 TmpInst.addOperand(MCOperand::CreateReg(0));
1718 OutStreamer.EmitInstruction(TmpInst);
1720 // Output the data for the jump table itself
1725 // Non-Darwin binutils don't yet support the "trap" mnemonic.
1726 // FIXME: Remove this special case when they do.
1727 if (!Subtarget->isTargetDarwin()) {
1728 //.long 0xe7ffdefe @ trap
1729 uint32_t Val = 0xe7ffdefeUL;
1730 OutStreamer.AddComment("trap");
1731 OutStreamer.EmitIntValue(Val, 4);
1737 // Non-Darwin binutils don't yet support the "trap" mnemonic.
1738 // FIXME: Remove this special case when they do.
1739 if (!Subtarget->isTargetDarwin()) {
1740 //.short 57086 @ trap
1741 uint16_t Val = 0xdefe;
1742 OutStreamer.AddComment("trap");
1743 OutStreamer.EmitIntValue(Val, 2);
1748 case ARM::t2Int_eh_sjlj_setjmp:
1749 case ARM::t2Int_eh_sjlj_setjmp_nofp:
1750 case ARM::tInt_eh_sjlj_setjmp: {
1751 // Two incoming args: GPR:$src, GPR:$val
1754 // str $val, [$src, #4]
1759 unsigned SrcReg = MI->getOperand(0).getReg();
1760 unsigned ValReg = MI->getOperand(1).getReg();
1761 MCSymbol *Label = GetARMSJLJEHLabel();
1764 TmpInst.setOpcode(ARM::tMOVr);
1765 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1766 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1768 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1769 TmpInst.addOperand(MCOperand::CreateReg(0));
1770 OutStreamer.AddComment("eh_setjmp begin");
1771 OutStreamer.EmitInstruction(TmpInst);
1775 TmpInst.setOpcode(ARM::tADDi3);
1776 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1778 TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1779 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1780 TmpInst.addOperand(MCOperand::CreateImm(7));
1782 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1783 TmpInst.addOperand(MCOperand::CreateReg(0));
1784 OutStreamer.EmitInstruction(TmpInst);
1788 TmpInst.setOpcode(ARM::tSTRi);
1789 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1790 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1791 // The offset immediate is #4. The operand value is scaled by 4 for the
1792 // tSTR instruction.
1793 TmpInst.addOperand(MCOperand::CreateImm(1));
1795 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1796 TmpInst.addOperand(MCOperand::CreateReg(0));
1797 OutStreamer.EmitInstruction(TmpInst);
1801 TmpInst.setOpcode(ARM::tMOVi8);
1802 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1803 TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1804 TmpInst.addOperand(MCOperand::CreateImm(0));
1806 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1807 TmpInst.addOperand(MCOperand::CreateReg(0));
1808 OutStreamer.EmitInstruction(TmpInst);
1811 const MCExpr *SymbolExpr = MCSymbolRefExpr::Create(Label, OutContext);
1813 TmpInst.setOpcode(ARM::tB);
1814 TmpInst.addOperand(MCOperand::CreateExpr(SymbolExpr));
1815 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1816 TmpInst.addOperand(MCOperand::CreateReg(0));
1817 OutStreamer.EmitInstruction(TmpInst);
1821 TmpInst.setOpcode(ARM::tMOVi8);
1822 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1823 TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1824 TmpInst.addOperand(MCOperand::CreateImm(1));
1826 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1827 TmpInst.addOperand(MCOperand::CreateReg(0));
1828 OutStreamer.AddComment("eh_setjmp end");
1829 OutStreamer.EmitInstruction(TmpInst);
1831 OutStreamer.EmitLabel(Label);
1835 case ARM::Int_eh_sjlj_setjmp_nofp:
1836 case ARM::Int_eh_sjlj_setjmp: {
1837 // Two incoming args: GPR:$src, GPR:$val
1839 // str $val, [$src, #+4]
1843 unsigned SrcReg = MI->getOperand(0).getReg();
1844 unsigned ValReg = MI->getOperand(1).getReg();
1848 TmpInst.setOpcode(ARM::ADDri);
1849 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1850 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1851 TmpInst.addOperand(MCOperand::CreateImm(8));
1853 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1854 TmpInst.addOperand(MCOperand::CreateReg(0));
1855 // 's' bit operand (always reg0 for this).
1856 TmpInst.addOperand(MCOperand::CreateReg(0));
1857 OutStreamer.AddComment("eh_setjmp begin");
1858 OutStreamer.EmitInstruction(TmpInst);
1862 TmpInst.setOpcode(ARM::STRi12);
1863 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1864 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1865 TmpInst.addOperand(MCOperand::CreateImm(4));
1867 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1868 TmpInst.addOperand(MCOperand::CreateReg(0));
1869 OutStreamer.EmitInstruction(TmpInst);
1873 TmpInst.setOpcode(ARM::MOVi);
1874 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1875 TmpInst.addOperand(MCOperand::CreateImm(0));
1877 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1878 TmpInst.addOperand(MCOperand::CreateReg(0));
1879 // 's' bit operand (always reg0 for this).
1880 TmpInst.addOperand(MCOperand::CreateReg(0));
1881 OutStreamer.EmitInstruction(TmpInst);
1885 TmpInst.setOpcode(ARM::ADDri);
1886 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1887 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1888 TmpInst.addOperand(MCOperand::CreateImm(0));
1890 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1891 TmpInst.addOperand(MCOperand::CreateReg(0));
1892 // 's' bit operand (always reg0 for this).
1893 TmpInst.addOperand(MCOperand::CreateReg(0));
1894 OutStreamer.EmitInstruction(TmpInst);
1898 TmpInst.setOpcode(ARM::MOVi);
1899 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1900 TmpInst.addOperand(MCOperand::CreateImm(1));
1902 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1903 TmpInst.addOperand(MCOperand::CreateReg(0));
1904 // 's' bit operand (always reg0 for this).
1905 TmpInst.addOperand(MCOperand::CreateReg(0));
1906 OutStreamer.AddComment("eh_setjmp end");
1907 OutStreamer.EmitInstruction(TmpInst);
1911 case ARM::Int_eh_sjlj_longjmp: {
1912 // ldr sp, [$src, #8]
1913 // ldr $scratch, [$src, #4]
1916 unsigned SrcReg = MI->getOperand(0).getReg();
1917 unsigned ScratchReg = MI->getOperand(1).getReg();
1920 TmpInst.setOpcode(ARM::LDRi12);
1921 TmpInst.addOperand(MCOperand::CreateReg(ARM::SP));
1922 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1923 TmpInst.addOperand(MCOperand::CreateImm(8));
1925 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1926 TmpInst.addOperand(MCOperand::CreateReg(0));
1927 OutStreamer.EmitInstruction(TmpInst);
1931 TmpInst.setOpcode(ARM::LDRi12);
1932 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1933 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1934 TmpInst.addOperand(MCOperand::CreateImm(4));
1936 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1937 TmpInst.addOperand(MCOperand::CreateReg(0));
1938 OutStreamer.EmitInstruction(TmpInst);
1942 TmpInst.setOpcode(ARM::LDRi12);
1943 TmpInst.addOperand(MCOperand::CreateReg(ARM::R7));
1944 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1945 TmpInst.addOperand(MCOperand::CreateImm(0));
1947 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1948 TmpInst.addOperand(MCOperand::CreateReg(0));
1949 OutStreamer.EmitInstruction(TmpInst);
1953 TmpInst.setOpcode(ARM::BX);
1954 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1956 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1957 TmpInst.addOperand(MCOperand::CreateReg(0));
1958 OutStreamer.EmitInstruction(TmpInst);
1962 case ARM::tInt_eh_sjlj_longjmp: {
1963 // ldr $scratch, [$src, #8]
1965 // ldr $scratch, [$src, #4]
1968 unsigned SrcReg = MI->getOperand(0).getReg();
1969 unsigned ScratchReg = MI->getOperand(1).getReg();
1972 TmpInst.setOpcode(ARM::tLDRi);
1973 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1974 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1975 // The offset immediate is #8. The operand value is scaled by 4 for the
1976 // tLDR instruction.
1977 TmpInst.addOperand(MCOperand::CreateImm(2));
1979 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1980 TmpInst.addOperand(MCOperand::CreateReg(0));
1981 OutStreamer.EmitInstruction(TmpInst);
1985 TmpInst.setOpcode(ARM::tMOVr);
1986 TmpInst.addOperand(MCOperand::CreateReg(ARM::SP));
1987 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1989 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1990 TmpInst.addOperand(MCOperand::CreateReg(0));
1991 OutStreamer.EmitInstruction(TmpInst);
1995 TmpInst.setOpcode(ARM::tLDRi);
1996 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1997 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1998 TmpInst.addOperand(MCOperand::CreateImm(1));
2000 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
2001 TmpInst.addOperand(MCOperand::CreateReg(0));
2002 OutStreamer.EmitInstruction(TmpInst);
2006 TmpInst.setOpcode(ARM::tLDRi);
2007 TmpInst.addOperand(MCOperand::CreateReg(ARM::R7));
2008 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
2009 TmpInst.addOperand(MCOperand::CreateImm(0));
2011 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
2012 TmpInst.addOperand(MCOperand::CreateReg(0));
2013 OutStreamer.EmitInstruction(TmpInst);
2017 TmpInst.setOpcode(ARM::tBX);
2018 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
2020 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
2021 TmpInst.addOperand(MCOperand::CreateReg(0));
2022 OutStreamer.EmitInstruction(TmpInst);
2029 LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
2031 OutStreamer.EmitInstruction(TmpInst);
2034 //===----------------------------------------------------------------------===//
2035 // Target Registry Stuff
2036 //===----------------------------------------------------------------------===//
2038 // Force static initialization.
2039 extern "C" void LLVMInitializeARMAsmPrinter() {
2040 RegisterAsmPrinter<ARMAsmPrinter> X(TheARMTarget);
2041 RegisterAsmPrinter<ARMAsmPrinter> Y(TheThumbTarget);