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/ADT/SetVector.h"
27 #include "llvm/ADT/SmallString.h"
28 #include "llvm/Constants.h"
29 #include "llvm/DebugInfo.h"
30 #include "llvm/Module.h"
31 #include "llvm/Type.h"
32 #include "llvm/Assembly/Writer.h"
33 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
34 #include "llvm/CodeGen/MachineFunctionPass.h"
35 #include "llvm/CodeGen/MachineJumpTableInfo.h"
36 #include "llvm/MC/MCAsmInfo.h"
37 #include "llvm/MC/MCAssembler.h"
38 #include "llvm/MC/MCContext.h"
39 #include "llvm/MC/MCInst.h"
40 #include "llvm/MC/MCSectionMachO.h"
41 #include "llvm/MC/MCObjectStreamer.h"
42 #include "llvm/MC/MCStreamer.h"
43 #include "llvm/MC/MCSymbol.h"
44 #include "llvm/Target/Mangler.h"
45 #include "llvm/DataLayout.h"
46 #include "llvm/Target/TargetMachine.h"
47 #include "llvm/Support/CommandLine.h"
48 #include "llvm/Support/Debug.h"
49 #include "llvm/Support/ErrorHandling.h"
50 #include "llvm/Support/TargetRegistry.h"
51 #include "llvm/Support/raw_ostream.h"
57 // Per section and per symbol attributes are not supported.
58 // To implement them we would need the ability to delay this emission
59 // until the assembly file is fully parsed/generated as only then do we
60 // know the symbol and section numbers.
61 class AttributeEmitter {
63 virtual void MaybeSwitchVendor(StringRef Vendor) = 0;
64 virtual void EmitAttribute(unsigned Attribute, unsigned Value) = 0;
65 virtual void EmitTextAttribute(unsigned Attribute, StringRef String) = 0;
66 virtual void Finish() = 0;
67 virtual ~AttributeEmitter() {}
70 class AsmAttributeEmitter : public AttributeEmitter {
74 AsmAttributeEmitter(MCStreamer &Streamer_) : Streamer(Streamer_) {}
75 void MaybeSwitchVendor(StringRef Vendor) { }
77 void EmitAttribute(unsigned Attribute, unsigned Value) {
78 Streamer.EmitRawText("\t.eabi_attribute " +
79 Twine(Attribute) + ", " + Twine(Value));
82 void EmitTextAttribute(unsigned Attribute, StringRef String) {
84 default: llvm_unreachable("Unsupported Text attribute in ASM Mode");
85 case ARMBuildAttrs::CPU_name:
86 Streamer.EmitRawText(StringRef("\t.cpu ") + String.lower());
88 /* GAS requires .fpu to be emitted regardless of EABI attribute */
89 case ARMBuildAttrs::Advanced_SIMD_arch:
90 case ARMBuildAttrs::VFP_arch:
91 Streamer.EmitRawText(StringRef("\t.fpu ") + String.lower());
98 class ObjectAttributeEmitter : public AttributeEmitter {
99 // This structure holds all attributes, accounting for
100 // their string/numeric value, so we can later emmit them
101 // in declaration order, keeping all in the same vector
102 struct AttributeItemType {
110 StringRef StringValue;
113 MCObjectStreamer &Streamer;
114 StringRef CurrentVendor;
115 SmallVector<AttributeItemType, 64> Contents;
117 // Account for the ULEB/String size of each item,
118 // not just the number of items
120 // FIXME: this should be in a more generic place, but
121 // getULEBSize() is in MCAsmInfo and will be moved to MCDwarf
122 size_t getULEBSize(int Value) {
126 Size += sizeof(int8_t); // Is this really necessary?
132 ObjectAttributeEmitter(MCObjectStreamer &Streamer_) :
133 Streamer(Streamer_), CurrentVendor(""), ContentsSize(0) { }
135 void MaybeSwitchVendor(StringRef Vendor) {
136 assert(!Vendor.empty() && "Vendor cannot be empty.");
138 if (CurrentVendor.empty())
139 CurrentVendor = Vendor;
140 else if (CurrentVendor == Vendor)
145 CurrentVendor = Vendor;
147 assert(Contents.size() == 0);
150 void EmitAttribute(unsigned Attribute, unsigned Value) {
151 AttributeItemType attr = {
152 AttributeItemType::NumericAttribute,
157 ContentsSize += getULEBSize(Attribute);
158 ContentsSize += getULEBSize(Value);
159 Contents.push_back(attr);
162 void EmitTextAttribute(unsigned Attribute, StringRef String) {
163 AttributeItemType attr = {
164 AttributeItemType::TextAttribute,
169 ContentsSize += getULEBSize(Attribute);
171 ContentsSize += String.size()+1;
173 Contents.push_back(attr);
177 // Vendor size + Vendor name + '\0'
178 const size_t VendorHeaderSize = 4 + CurrentVendor.size() + 1;
181 const size_t TagHeaderSize = 1 + 4;
183 Streamer.EmitIntValue(VendorHeaderSize + TagHeaderSize + ContentsSize, 4);
184 Streamer.EmitBytes(CurrentVendor, 0);
185 Streamer.EmitIntValue(0, 1); // '\0'
187 Streamer.EmitIntValue(ARMBuildAttrs::File, 1);
188 Streamer.EmitIntValue(TagHeaderSize + ContentsSize, 4);
190 // Size should have been accounted for already, now
191 // emit each field as its type (ULEB or String)
192 for (unsigned int i=0; i<Contents.size(); ++i) {
193 AttributeItemType item = Contents[i];
194 Streamer.EmitULEB128IntValue(item.Tag, 0);
196 default: llvm_unreachable("Invalid attribute type");
197 case AttributeItemType::NumericAttribute:
198 Streamer.EmitULEB128IntValue(item.IntValue, 0);
200 case AttributeItemType::TextAttribute:
201 Streamer.EmitBytes(item.StringValue.upper(), 0);
202 Streamer.EmitIntValue(0, 1); // '\0'
211 } // end of anonymous namespace
213 MachineLocation ARMAsmPrinter::
214 getDebugValueLocation(const MachineInstr *MI) const {
215 MachineLocation Location;
216 assert(MI->getNumOperands() == 4 && "Invalid no. of machine operands!");
217 // Frame address. Currently handles register +- offset only.
218 if (MI->getOperand(0).isReg() && MI->getOperand(1).isImm())
219 Location.set(MI->getOperand(0).getReg(), MI->getOperand(1).getImm());
221 DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n");
226 /// EmitDwarfRegOp - Emit dwarf register operation.
227 void ARMAsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const {
228 const TargetRegisterInfo *RI = TM.getRegisterInfo();
229 if (RI->getDwarfRegNum(MLoc.getReg(), false) != -1)
230 AsmPrinter::EmitDwarfRegOp(MLoc);
232 unsigned Reg = MLoc.getReg();
233 if (Reg >= ARM::S0 && Reg <= ARM::S31) {
234 assert(ARM::S0 + 31 == ARM::S31 && "Unexpected ARM S register numbering");
235 // S registers are described as bit-pieces of a register
236 // S[2x] = DW_OP_regx(256 + (x>>1)) DW_OP_bit_piece(32, 0)
237 // S[2x+1] = DW_OP_regx(256 + (x>>1)) DW_OP_bit_piece(32, 32)
239 unsigned SReg = Reg - ARM::S0;
240 bool odd = SReg & 0x1;
241 unsigned Rx = 256 + (SReg >> 1);
243 OutStreamer.AddComment("DW_OP_regx for S register");
244 EmitInt8(dwarf::DW_OP_regx);
246 OutStreamer.AddComment(Twine(SReg));
250 OutStreamer.AddComment("DW_OP_bit_piece 32 32");
251 EmitInt8(dwarf::DW_OP_bit_piece);
255 OutStreamer.AddComment("DW_OP_bit_piece 32 0");
256 EmitInt8(dwarf::DW_OP_bit_piece);
260 } else if (Reg >= ARM::Q0 && Reg <= ARM::Q15) {
261 assert(ARM::Q0 + 15 == ARM::Q15 && "Unexpected ARM Q register numbering");
262 // Q registers Q0-Q15 are described by composing two D registers together.
263 // Qx = DW_OP_regx(256+2x) DW_OP_piece(8) DW_OP_regx(256+2x+1)
266 unsigned QReg = Reg - ARM::Q0;
267 unsigned D1 = 256 + 2 * QReg;
268 unsigned D2 = D1 + 1;
270 OutStreamer.AddComment("DW_OP_regx for Q register: D1");
271 EmitInt8(dwarf::DW_OP_regx);
273 OutStreamer.AddComment("DW_OP_piece 8");
274 EmitInt8(dwarf::DW_OP_piece);
277 OutStreamer.AddComment("DW_OP_regx for Q register: D2");
278 EmitInt8(dwarf::DW_OP_regx);
280 OutStreamer.AddComment("DW_OP_piece 8");
281 EmitInt8(dwarf::DW_OP_piece);
287 void ARMAsmPrinter::EmitFunctionBodyEnd() {
288 // Make sure to terminate any constant pools that were at the end
292 InConstantPool = false;
293 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
296 void ARMAsmPrinter::EmitFunctionEntryLabel() {
297 if (AFI->isThumbFunction()) {
298 OutStreamer.EmitAssemblerFlag(MCAF_Code16);
299 OutStreamer.EmitThumbFunc(CurrentFnSym);
302 OutStreamer.EmitLabel(CurrentFnSym);
305 void ARMAsmPrinter::EmitXXStructor(const Constant *CV) {
306 uint64_t Size = TM.getDataLayout()->getTypeAllocSize(CV->getType());
307 assert(Size && "C++ constructor pointer had zero size!");
309 const GlobalValue *GV = dyn_cast<GlobalValue>(CV->stripPointerCasts());
310 assert(GV && "C++ constructor pointer was not a GlobalValue!");
312 const MCExpr *E = MCSymbolRefExpr::Create(Mang->getSymbol(GV),
313 (Subtarget->isTargetDarwin()
314 ? MCSymbolRefExpr::VK_None
315 : MCSymbolRefExpr::VK_ARM_TARGET1),
318 OutStreamer.EmitValue(E, Size);
321 /// runOnMachineFunction - This uses the EmitInstruction()
322 /// method to print assembly for each instruction.
324 bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
325 AFI = MF.getInfo<ARMFunctionInfo>();
326 MCP = MF.getConstantPool();
328 return AsmPrinter::runOnMachineFunction(MF);
331 void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
332 raw_ostream &O, const char *Modifier) {
333 const MachineOperand &MO = MI->getOperand(OpNum);
334 unsigned TF = MO.getTargetFlags();
336 switch (MO.getType()) {
337 default: llvm_unreachable("<unknown operand type>");
338 case MachineOperand::MO_Register: {
339 unsigned Reg = MO.getReg();
340 assert(TargetRegisterInfo::isPhysicalRegister(Reg));
341 assert(!MO.getSubReg() && "Subregs should be eliminated!");
342 O << ARMInstPrinter::getRegisterName(Reg);
345 case MachineOperand::MO_Immediate: {
346 int64_t Imm = MO.getImm();
348 if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
349 (TF == ARMII::MO_LO16))
351 else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
352 (TF == ARMII::MO_HI16))
357 case MachineOperand::MO_MachineBasicBlock:
358 O << *MO.getMBB()->getSymbol();
360 case MachineOperand::MO_GlobalAddress: {
361 const GlobalValue *GV = MO.getGlobal();
362 if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
363 (TF & ARMII::MO_LO16))
365 else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
366 (TF & ARMII::MO_HI16))
368 O << *Mang->getSymbol(GV);
370 printOffset(MO.getOffset(), O);
371 if (TF == ARMII::MO_PLT)
375 case MachineOperand::MO_ExternalSymbol: {
376 O << *GetExternalSymbolSymbol(MO.getSymbolName());
377 if (TF == ARMII::MO_PLT)
381 case MachineOperand::MO_ConstantPoolIndex:
382 O << *GetCPISymbol(MO.getIndex());
384 case MachineOperand::MO_JumpTableIndex:
385 O << *GetJTISymbol(MO.getIndex());
390 //===--------------------------------------------------------------------===//
392 MCSymbol *ARMAsmPrinter::
393 GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const {
394 SmallString<60> Name;
395 raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "JTI"
396 << getFunctionNumber() << '_' << uid << '_' << uid2;
397 return OutContext.GetOrCreateSymbol(Name.str());
401 MCSymbol *ARMAsmPrinter::GetARMSJLJEHLabel(void) const {
402 SmallString<60> Name;
403 raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "SJLJEH"
404 << getFunctionNumber();
405 return OutContext.GetOrCreateSymbol(Name.str());
408 bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
409 unsigned AsmVariant, const char *ExtraCode,
411 // Does this asm operand have a single letter operand modifier?
412 if (ExtraCode && ExtraCode[0]) {
413 if (ExtraCode[1] != 0) return true; // Unknown modifier.
415 switch (ExtraCode[0]) {
417 // See if this is a generic print operand
418 return AsmPrinter::PrintAsmOperand(MI, OpNum, AsmVariant, ExtraCode, O);
419 case 'a': // Print as a memory address.
420 if (MI->getOperand(OpNum).isReg()) {
422 << ARMInstPrinter::getRegisterName(MI->getOperand(OpNum).getReg())
427 case 'c': // Don't print "#" before an immediate operand.
428 if (!MI->getOperand(OpNum).isImm())
430 O << MI->getOperand(OpNum).getImm();
432 case 'P': // Print a VFP double precision register.
433 case 'q': // Print a NEON quad precision register.
434 printOperand(MI, OpNum, O);
436 case 'y': // Print a VFP single precision register as indexed double.
437 if (MI->getOperand(OpNum).isReg()) {
438 unsigned Reg = MI->getOperand(OpNum).getReg();
439 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
440 // Find the 'd' register that has this 's' register as a sub-register,
441 // and determine the lane number.
442 for (MCSuperRegIterator SR(Reg, TRI); SR.isValid(); ++SR) {
443 if (!ARM::DPRRegClass.contains(*SR))
445 bool Lane0 = TRI->getSubReg(*SR, ARM::ssub_0) == Reg;
446 O << ARMInstPrinter::getRegisterName(*SR) << (Lane0 ? "[0]" : "[1]");
451 case 'B': // Bitwise inverse of integer or symbol without a preceding #.
452 if (!MI->getOperand(OpNum).isImm())
454 O << ~(MI->getOperand(OpNum).getImm());
456 case 'L': // The low 16 bits of an immediate constant.
457 if (!MI->getOperand(OpNum).isImm())
459 O << (MI->getOperand(OpNum).getImm() & 0xffff);
461 case 'M': { // A register range suitable for LDM/STM.
462 if (!MI->getOperand(OpNum).isReg())
464 const MachineOperand &MO = MI->getOperand(OpNum);
465 unsigned RegBegin = MO.getReg();
466 // This takes advantage of the 2 operand-ness of ldm/stm and that we've
467 // already got the operands in registers that are operands to the
468 // inline asm statement.
470 O << "{" << ARMInstPrinter::getRegisterName(RegBegin);
472 // FIXME: The register allocator not only may not have given us the
473 // registers in sequence, but may not be in ascending registers. This
474 // will require changes in the register allocator that'll need to be
475 // propagated down here if the operands change.
476 unsigned RegOps = OpNum + 1;
477 while (MI->getOperand(RegOps).isReg()) {
479 << ARMInstPrinter::getRegisterName(MI->getOperand(RegOps).getReg());
487 case 'R': // The most significant register of a pair.
488 case 'Q': { // The least significant register of a pair.
491 const MachineOperand &FlagsOP = MI->getOperand(OpNum - 1);
492 if (!FlagsOP.isImm())
494 unsigned Flags = FlagsOP.getImm();
495 unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
498 unsigned RegOp = ExtraCode[0] == 'Q' ? OpNum : OpNum + 1;
499 if (RegOp >= MI->getNumOperands())
501 const MachineOperand &MO = MI->getOperand(RegOp);
504 unsigned Reg = MO.getReg();
505 O << ARMInstPrinter::getRegisterName(Reg);
509 case 'e': // The low doubleword register of a NEON quad register.
510 case 'f': { // The high doubleword register of a NEON quad register.
511 if (!MI->getOperand(OpNum).isReg())
513 unsigned Reg = MI->getOperand(OpNum).getReg();
514 if (!ARM::QPRRegClass.contains(Reg))
516 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
517 unsigned SubReg = TRI->getSubReg(Reg, ExtraCode[0] == 'e' ?
518 ARM::dsub_0 : ARM::dsub_1);
519 O << ARMInstPrinter::getRegisterName(SubReg);
523 // This modifier is not yet supported.
524 case 'h': // A range of VFP/NEON registers suitable for VLD1/VST1.
526 case 'H': { // The highest-numbered register of a pair.
527 const MachineOperand &MO = MI->getOperand(OpNum);
530 const TargetRegisterClass &RC = ARM::GPRRegClass;
531 const MachineFunction &MF = *MI->getParent()->getParent();
532 const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
534 unsigned RegIdx = TRI->getEncodingValue(MO.getReg());
535 RegIdx |= 1; //The odd register is also the higher-numbered one of a pair.
537 unsigned Reg = RC.getRegister(RegIdx);
538 O << ARMInstPrinter::getRegisterName(Reg);
544 printOperand(MI, OpNum, O);
548 bool ARMAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
549 unsigned OpNum, unsigned AsmVariant,
550 const char *ExtraCode,
552 // Does this asm operand have a single letter operand modifier?
553 if (ExtraCode && ExtraCode[0]) {
554 if (ExtraCode[1] != 0) return true; // Unknown modifier.
556 switch (ExtraCode[0]) {
557 case 'A': // A memory operand for a VLD1/VST1 instruction.
558 default: return true; // Unknown modifier.
559 case 'm': // The base register of a memory operand.
560 if (!MI->getOperand(OpNum).isReg())
562 O << ARMInstPrinter::getRegisterName(MI->getOperand(OpNum).getReg());
567 const MachineOperand &MO = MI->getOperand(OpNum);
568 assert(MO.isReg() && "unexpected inline asm memory operand");
569 O << "[" << ARMInstPrinter::getRegisterName(MO.getReg()) << "]";
573 void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) {
574 if (Subtarget->isTargetDarwin()) {
575 Reloc::Model RelocM = TM.getRelocationModel();
576 if (RelocM == Reloc::PIC_ || RelocM == Reloc::DynamicNoPIC) {
577 // Declare all the text sections up front (before the DWARF sections
578 // emitted by AsmPrinter::doInitialization) so the assembler will keep
579 // them together at the beginning of the object file. This helps
580 // avoid out-of-range branches that are due a fundamental limitation of
581 // the way symbol offsets are encoded with the current Darwin ARM
583 const TargetLoweringObjectFileMachO &TLOFMacho =
584 static_cast<const TargetLoweringObjectFileMachO &>(
585 getObjFileLowering());
587 // Collect the set of sections our functions will go into.
588 SetVector<const MCSection *, SmallVector<const MCSection *, 8>,
589 SmallPtrSet<const MCSection *, 8> > TextSections;
590 // Default text section comes first.
591 TextSections.insert(TLOFMacho.getTextSection());
592 // Now any user defined text sections from function attributes.
593 for (Module::iterator F = M.begin(), e = M.end(); F != e; ++F)
594 if (!F->isDeclaration() && !F->hasAvailableExternallyLinkage())
595 TextSections.insert(TLOFMacho.SectionForGlobal(F, Mang, TM));
596 // Now the coalescable sections.
597 TextSections.insert(TLOFMacho.getTextCoalSection());
598 TextSections.insert(TLOFMacho.getConstTextCoalSection());
600 // Emit the sections in the .s file header to fix the order.
601 for (unsigned i = 0, e = TextSections.size(); i != e; ++i)
602 OutStreamer.SwitchSection(TextSections[i]);
604 if (RelocM == Reloc::DynamicNoPIC) {
605 const MCSection *sect =
606 OutContext.getMachOSection("__TEXT", "__symbol_stub4",
607 MCSectionMachO::S_SYMBOL_STUBS,
608 12, SectionKind::getText());
609 OutStreamer.SwitchSection(sect);
611 const MCSection *sect =
612 OutContext.getMachOSection("__TEXT", "__picsymbolstub4",
613 MCSectionMachO::S_SYMBOL_STUBS,
614 16, SectionKind::getText());
615 OutStreamer.SwitchSection(sect);
617 const MCSection *StaticInitSect =
618 OutContext.getMachOSection("__TEXT", "__StaticInit",
619 MCSectionMachO::S_REGULAR |
620 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
621 SectionKind::getText());
622 OutStreamer.SwitchSection(StaticInitSect);
626 // Use unified assembler syntax.
627 OutStreamer.EmitAssemblerFlag(MCAF_SyntaxUnified);
629 // Emit ARM Build Attributes
630 if (Subtarget->isTargetELF())
635 void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
636 if (Subtarget->isTargetDarwin()) {
637 // All darwin targets use mach-o.
638 const TargetLoweringObjectFileMachO &TLOFMacho =
639 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
640 MachineModuleInfoMachO &MMIMacho =
641 MMI->getObjFileInfo<MachineModuleInfoMachO>();
643 // Output non-lazy-pointers for external and common global variables.
644 MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetGVStubList();
646 if (!Stubs.empty()) {
647 // Switch with ".non_lazy_symbol_pointer" directive.
648 OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
650 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
652 OutStreamer.EmitLabel(Stubs[i].first);
653 // .indirect_symbol _foo
654 MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
655 OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),MCSA_IndirectSymbol);
658 // External to current translation unit.
659 OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
661 // Internal to current translation unit.
663 // When we place the LSDA into the TEXT section, the type info
664 // pointers need to be indirect and pc-rel. We accomplish this by
665 // using NLPs; however, sometimes the types are local to the file.
666 // We need to fill in the value for the NLP in those cases.
667 OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
669 4/*size*/, 0/*addrspace*/);
673 OutStreamer.AddBlankLine();
676 Stubs = MMIMacho.GetHiddenGVStubList();
677 if (!Stubs.empty()) {
678 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
680 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
682 OutStreamer.EmitLabel(Stubs[i].first);
684 OutStreamer.EmitValue(MCSymbolRefExpr::
685 Create(Stubs[i].second.getPointer(),
687 4/*size*/, 0/*addrspace*/);
691 OutStreamer.AddBlankLine();
694 // Funny Darwin hack: This flag tells the linker that no global symbols
695 // contain code that falls through to other global symbols (e.g. the obvious
696 // implementation of multiple entry points). If this doesn't occur, the
697 // linker can safely perform dead code stripping. Since LLVM never
698 // generates code that does this, it is always safe to set.
699 OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
703 //===----------------------------------------------------------------------===//
704 // Helper routines for EmitStartOfAsmFile() and EmitEndOfAsmFile()
706 // The following seem like one-off assembler flags, but they actually need
707 // to appear in the .ARM.attributes section in ELF.
708 // Instead of subclassing the MCELFStreamer, we do the work here.
710 void ARMAsmPrinter::emitAttributes() {
712 emitARMAttributeSection();
714 /* GAS expect .fpu to be emitted, regardless of VFP build attribute */
715 bool emitFPU = false;
716 AttributeEmitter *AttrEmitter;
717 if (OutStreamer.hasRawTextSupport()) {
718 AttrEmitter = new AsmAttributeEmitter(OutStreamer);
721 MCObjectStreamer &O = static_cast<MCObjectStreamer&>(OutStreamer);
722 AttrEmitter = new ObjectAttributeEmitter(O);
725 AttrEmitter->MaybeSwitchVendor("aeabi");
727 std::string CPUString = Subtarget->getCPUString();
729 if (CPUString == "cortex-a8" ||
730 Subtarget->isCortexA8()) {
731 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::CPU_name, "cortex-a8");
732 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v7);
733 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch_profile,
734 ARMBuildAttrs::ApplicationProfile);
735 AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
736 ARMBuildAttrs::Allowed);
737 AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
738 ARMBuildAttrs::AllowThumb32);
739 // Fixme: figure out when this is emitted.
740 //AttrEmitter->EmitAttribute(ARMBuildAttrs::WMMX_arch,
741 // ARMBuildAttrs::AllowWMMXv1);
744 /// ADD additional Else-cases here!
745 } else if (CPUString == "xscale") {
746 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v5TEJ);
747 AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
748 ARMBuildAttrs::Allowed);
749 AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
750 ARMBuildAttrs::Allowed);
751 } else if (CPUString == "generic") {
752 // For a generic CPU, we assume a standard v7a architecture in Subtarget.
753 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v7);
754 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch_profile,
755 ARMBuildAttrs::ApplicationProfile);
756 AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
757 ARMBuildAttrs::Allowed);
758 AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
759 ARMBuildAttrs::AllowThumb32);
760 } else if (Subtarget->hasV7Ops()) {
761 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v7);
762 AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
763 ARMBuildAttrs::AllowThumb32);
764 } else if (Subtarget->hasV6T2Ops())
765 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v6T2);
766 else if (Subtarget->hasV6Ops())
767 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v6);
768 else if (Subtarget->hasV5TEOps())
769 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v5TE);
770 else if (Subtarget->hasV5TOps())
771 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v5T);
772 else if (Subtarget->hasV4TOps())
773 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v4T);
775 llvm_unreachable("No target ARM architecture detected.");
777 if (Subtarget->hasNEON() && emitFPU) {
778 /* NEON is not exactly a VFP architecture, but GAS emit one of
779 * neon/neon-vfpv4/vfpv3/vfpv2 for .fpu parameters */
780 if (Subtarget->hasVFP4())
781 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::Advanced_SIMD_arch,
784 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::Advanced_SIMD_arch, "neon");
785 /* If emitted for NEON, omit from VFP below, since you can have both
786 * NEON and VFP in build attributes but only one .fpu */
791 if (Subtarget->hasVFP4()) {
792 AttrEmitter->EmitAttribute(ARMBuildAttrs::VFP_arch,
793 ARMBuildAttrs::AllowFPv4A);
795 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::VFP_arch, "vfpv4");
798 } else if (Subtarget->hasVFP3()) {
799 AttrEmitter->EmitAttribute(ARMBuildAttrs::VFP_arch,
800 ARMBuildAttrs::AllowFPv3A);
802 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::VFP_arch, "vfpv3");
805 } else if (Subtarget->hasVFP2()) {
806 AttrEmitter->EmitAttribute(ARMBuildAttrs::VFP_arch,
807 ARMBuildAttrs::AllowFPv2);
809 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::VFP_arch, "vfpv2");
812 /* TODO: ARMBuildAttrs::Allowed is not completely accurate,
813 * since NEON can have 1 (allowed) or 2 (MAC operations) */
814 if (Subtarget->hasNEON()) {
815 AttrEmitter->EmitAttribute(ARMBuildAttrs::Advanced_SIMD_arch,
816 ARMBuildAttrs::Allowed);
819 // Signal various FP modes.
820 if (!TM.Options.UnsafeFPMath) {
821 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_denormal,
822 ARMBuildAttrs::Allowed);
823 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_exceptions,
824 ARMBuildAttrs::Allowed);
827 if (TM.Options.NoInfsFPMath && TM.Options.NoNaNsFPMath)
828 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_number_model,
829 ARMBuildAttrs::Allowed);
831 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_number_model,
832 ARMBuildAttrs::AllowIEE754);
834 // FIXME: add more flags to ARMBuildAttrs.h
835 // 8-bytes alignment stuff.
836 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_align8_needed, 1);
837 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_align8_preserved, 1);
839 // Hard float. Use both S and D registers and conform to AAPCS-VFP.
840 if (Subtarget->isAAPCS_ABI() && TM.Options.FloatABIType == FloatABI::Hard) {
841 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_HardFP_use, 3);
842 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_VFP_args, 1);
844 // FIXME: Should we signal R9 usage?
846 if (Subtarget->hasDivide())
847 AttrEmitter->EmitAttribute(ARMBuildAttrs::DIV_use, 1);
849 AttrEmitter->Finish();
853 void ARMAsmPrinter::emitARMAttributeSection() {
855 // [ <section-length> "vendor-name"
856 // [ <file-tag> <size> <attribute>*
857 // | <section-tag> <size> <section-number>* 0 <attribute>*
858 // | <symbol-tag> <size> <symbol-number>* 0 <attribute>*
862 if (OutStreamer.hasRawTextSupport())
865 const ARMElfTargetObjectFile &TLOFELF =
866 static_cast<const ARMElfTargetObjectFile &>
867 (getObjFileLowering());
869 OutStreamer.SwitchSection(TLOFELF.getAttributesSection());
872 OutStreamer.EmitIntValue(0x41, 1);
875 //===----------------------------------------------------------------------===//
877 static MCSymbol *getPICLabel(const char *Prefix, unsigned FunctionNumber,
878 unsigned LabelId, MCContext &Ctx) {
880 MCSymbol *Label = Ctx.GetOrCreateSymbol(Twine(Prefix)
881 + "PC" + Twine(FunctionNumber) + "_" + Twine(LabelId));
885 static MCSymbolRefExpr::VariantKind
886 getModifierVariantKind(ARMCP::ARMCPModifier Modifier) {
888 case ARMCP::no_modifier: return MCSymbolRefExpr::VK_None;
889 case ARMCP::TLSGD: return MCSymbolRefExpr::VK_ARM_TLSGD;
890 case ARMCP::TPOFF: return MCSymbolRefExpr::VK_ARM_TPOFF;
891 case ARMCP::GOTTPOFF: return MCSymbolRefExpr::VK_ARM_GOTTPOFF;
892 case ARMCP::GOT: return MCSymbolRefExpr::VK_ARM_GOT;
893 case ARMCP::GOTOFF: return MCSymbolRefExpr::VK_ARM_GOTOFF;
895 llvm_unreachable("Invalid ARMCPModifier!");
898 MCSymbol *ARMAsmPrinter::GetARMGVSymbol(const GlobalValue *GV) {
899 bool isIndirect = Subtarget->isTargetDarwin() &&
900 Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
902 return Mang->getSymbol(GV);
904 // FIXME: Remove this when Darwin transition to @GOT like syntax.
905 MCSymbol *MCSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
906 MachineModuleInfoMachO &MMIMachO =
907 MMI->getObjFileInfo<MachineModuleInfoMachO>();
908 MachineModuleInfoImpl::StubValueTy &StubSym =
909 GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(MCSym) :
910 MMIMachO.getGVStubEntry(MCSym);
911 if (StubSym.getPointer() == 0)
912 StubSym = MachineModuleInfoImpl::
913 StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
918 EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
919 int Size = TM.getDataLayout()->getTypeAllocSize(MCPV->getType());
921 ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
924 if (ACPV->isLSDA()) {
925 SmallString<128> Str;
926 raw_svector_ostream OS(Str);
927 OS << MAI->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
928 MCSym = OutContext.GetOrCreateSymbol(OS.str());
929 } else if (ACPV->isBlockAddress()) {
930 const BlockAddress *BA =
931 cast<ARMConstantPoolConstant>(ACPV)->getBlockAddress();
932 MCSym = GetBlockAddressSymbol(BA);
933 } else if (ACPV->isGlobalValue()) {
934 const GlobalValue *GV = cast<ARMConstantPoolConstant>(ACPV)->getGV();
935 MCSym = GetARMGVSymbol(GV);
936 } else if (ACPV->isMachineBasicBlock()) {
937 const MachineBasicBlock *MBB = cast<ARMConstantPoolMBB>(ACPV)->getMBB();
938 MCSym = MBB->getSymbol();
940 assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
941 const char *Sym = cast<ARMConstantPoolSymbol>(ACPV)->getSymbol();
942 MCSym = GetExternalSymbolSymbol(Sym);
945 // Create an MCSymbol for the reference.
947 MCSymbolRefExpr::Create(MCSym, getModifierVariantKind(ACPV->getModifier()),
950 if (ACPV->getPCAdjustment()) {
951 MCSymbol *PCLabel = getPICLabel(MAI->getPrivateGlobalPrefix(),
955 const MCExpr *PCRelExpr = MCSymbolRefExpr::Create(PCLabel, OutContext);
957 MCBinaryExpr::CreateAdd(PCRelExpr,
958 MCConstantExpr::Create(ACPV->getPCAdjustment(),
961 if (ACPV->mustAddCurrentAddress()) {
962 // We want "(<expr> - .)", but MC doesn't have a concept of the '.'
963 // label, so just emit a local label end reference that instead.
964 MCSymbol *DotSym = OutContext.CreateTempSymbol();
965 OutStreamer.EmitLabel(DotSym);
966 const MCExpr *DotExpr = MCSymbolRefExpr::Create(DotSym, OutContext);
967 PCRelExpr = MCBinaryExpr::CreateSub(PCRelExpr, DotExpr, OutContext);
969 Expr = MCBinaryExpr::CreateSub(Expr, PCRelExpr, OutContext);
971 OutStreamer.EmitValue(Expr, Size);
974 void ARMAsmPrinter::EmitJumpTable(const MachineInstr *MI) {
975 unsigned Opcode = MI->getOpcode();
977 if (Opcode == ARM::BR_JTadd)
979 else if (Opcode == ARM::BR_JTm)
982 const MachineOperand &MO1 = MI->getOperand(OpNum);
983 const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
984 unsigned JTI = MO1.getIndex();
986 // Emit a label for the jump table.
987 MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
988 OutStreamer.EmitLabel(JTISymbol);
990 // Mark the jump table as data-in-code.
991 OutStreamer.EmitDataRegion(MCDR_DataRegionJT32);
993 // Emit each entry of the table.
994 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
995 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
996 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
998 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
999 MachineBasicBlock *MBB = JTBBs[i];
1000 // Construct an MCExpr for the entry. We want a value of the form:
1001 // (BasicBlockAddr - TableBeginAddr)
1003 // For example, a table with entries jumping to basic blocks BB0 and BB1
1006 // .word (LBB0 - LJTI_0_0)
1007 // .word (LBB1 - LJTI_0_0)
1008 const MCExpr *Expr = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
1010 if (TM.getRelocationModel() == Reloc::PIC_)
1011 Expr = MCBinaryExpr::CreateSub(Expr, MCSymbolRefExpr::Create(JTISymbol,
1014 // If we're generating a table of Thumb addresses in static relocation
1015 // model, we need to add one to keep interworking correctly.
1016 else if (AFI->isThumbFunction())
1017 Expr = MCBinaryExpr::CreateAdd(Expr, MCConstantExpr::Create(1,OutContext),
1019 OutStreamer.EmitValue(Expr, 4);
1021 // Mark the end of jump table data-in-code region.
1022 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
1025 void ARMAsmPrinter::EmitJump2Table(const MachineInstr *MI) {
1026 unsigned Opcode = MI->getOpcode();
1027 int OpNum = (Opcode == ARM::t2BR_JT) ? 2 : 1;
1028 const MachineOperand &MO1 = MI->getOperand(OpNum);
1029 const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
1030 unsigned JTI = MO1.getIndex();
1032 MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
1033 OutStreamer.EmitLabel(JTISymbol);
1035 // Emit each entry of the table.
1036 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
1037 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
1038 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
1039 unsigned OffsetWidth = 4;
1040 if (MI->getOpcode() == ARM::t2TBB_JT) {
1042 // Mark the jump table as data-in-code.
1043 OutStreamer.EmitDataRegion(MCDR_DataRegionJT8);
1044 } else if (MI->getOpcode() == ARM::t2TBH_JT) {
1046 // Mark the jump table as data-in-code.
1047 OutStreamer.EmitDataRegion(MCDR_DataRegionJT16);
1050 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
1051 MachineBasicBlock *MBB = JTBBs[i];
1052 const MCExpr *MBBSymbolExpr = MCSymbolRefExpr::Create(MBB->getSymbol(),
1054 // If this isn't a TBB or TBH, the entries are direct branch instructions.
1055 if (OffsetWidth == 4) {
1057 BrInst.setOpcode(ARM::t2B);
1058 BrInst.addOperand(MCOperand::CreateExpr(MBBSymbolExpr));
1059 BrInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1060 BrInst.addOperand(MCOperand::CreateReg(0));
1061 OutStreamer.EmitInstruction(BrInst);
1064 // Otherwise it's an offset from the dispatch instruction. Construct an
1065 // MCExpr for the entry. We want a value of the form:
1066 // (BasicBlockAddr - TableBeginAddr) / 2
1068 // For example, a TBB table with entries jumping to basic blocks BB0 and BB1
1071 // .byte (LBB0 - LJTI_0_0) / 2
1072 // .byte (LBB1 - LJTI_0_0) / 2
1073 const MCExpr *Expr =
1074 MCBinaryExpr::CreateSub(MBBSymbolExpr,
1075 MCSymbolRefExpr::Create(JTISymbol, OutContext),
1077 Expr = MCBinaryExpr::CreateDiv(Expr, MCConstantExpr::Create(2, OutContext),
1079 OutStreamer.EmitValue(Expr, OffsetWidth);
1081 // Mark the end of jump table data-in-code region. 32-bit offsets use
1082 // actual branch instructions here, so we don't mark those as a data-region
1084 if (OffsetWidth != 4)
1085 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
1088 void ARMAsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
1090 unsigned NOps = MI->getNumOperands();
1092 OS << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
1093 // cast away const; DIetc do not take const operands for some reason.
1094 DIVariable V(const_cast<MDNode *>(MI->getOperand(NOps-1).getMetadata()));
1097 // Frame address. Currently handles register +- offset only.
1098 assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm());
1099 OS << '['; printOperand(MI, 0, OS); OS << '+'; printOperand(MI, 1, OS);
1102 printOperand(MI, NOps-2, OS);
1105 static void populateADROperands(MCInst &Inst, unsigned Dest,
1106 const MCSymbol *Label,
1107 unsigned pred, unsigned ccreg,
1109 const MCExpr *SymbolExpr = MCSymbolRefExpr::Create(Label, Ctx);
1110 Inst.addOperand(MCOperand::CreateReg(Dest));
1111 Inst.addOperand(MCOperand::CreateExpr(SymbolExpr));
1112 // Add predicate operands.
1113 Inst.addOperand(MCOperand::CreateImm(pred));
1114 Inst.addOperand(MCOperand::CreateReg(ccreg));
1117 void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
1118 assert(MI->getFlag(MachineInstr::FrameSetup) &&
1119 "Only instruction which are involved into frame setup code are allowed");
1121 const MachineFunction &MF = *MI->getParent()->getParent();
1122 const TargetRegisterInfo *RegInfo = MF.getTarget().getRegisterInfo();
1123 const ARMFunctionInfo &AFI = *MF.getInfo<ARMFunctionInfo>();
1125 unsigned FramePtr = RegInfo->getFrameRegister(MF);
1126 unsigned Opc = MI->getOpcode();
1127 unsigned SrcReg, DstReg;
1129 if (Opc == ARM::tPUSH || Opc == ARM::tLDRpci) {
1130 // Two special cases:
1131 // 1) tPUSH does not have src/dst regs.
1132 // 2) for Thumb1 code we sometimes materialize the constant via constpool
1133 // load. Yes, this is pretty fragile, but for now I don't see better
1135 SrcReg = DstReg = ARM::SP;
1137 SrcReg = MI->getOperand(1).getReg();
1138 DstReg = MI->getOperand(0).getReg();
1141 // Try to figure out the unwinding opcode out of src / dst regs.
1142 if (MI->mayStore()) {
1144 assert(DstReg == ARM::SP &&
1145 "Only stack pointer as a destination reg is supported");
1147 SmallVector<unsigned, 4> RegList;
1148 // Skip src & dst reg, and pred ops.
1149 unsigned StartOp = 2 + 2;
1150 // Use all the operands.
1151 unsigned NumOffset = 0;
1156 llvm_unreachable("Unsupported opcode for unwinding information");
1158 // Special case here: no src & dst reg, but two extra imp ops.
1159 StartOp = 2; NumOffset = 2;
1160 case ARM::STMDB_UPD:
1161 case ARM::t2STMDB_UPD:
1162 case ARM::VSTMDDB_UPD:
1163 assert(SrcReg == ARM::SP &&
1164 "Only stack pointer as a source reg is supported");
1165 for (unsigned i = StartOp, NumOps = MI->getNumOperands() - NumOffset;
1167 const MachineOperand &MO = MI->getOperand(i);
1168 // Actually, there should never be any impdef stuff here. Skip it
1169 // temporary to workaround PR11902.
1170 if (MO.isImplicit())
1172 RegList.push_back(MO.getReg());
1175 case ARM::STR_PRE_IMM:
1176 case ARM::STR_PRE_REG:
1177 case ARM::t2STR_PRE:
1178 assert(MI->getOperand(2).getReg() == ARM::SP &&
1179 "Only stack pointer as a source reg is supported");
1180 RegList.push_back(SrcReg);
1183 OutStreamer.EmitRegSave(RegList, Opc == ARM::VSTMDDB_UPD);
1185 // Changes of stack / frame pointer.
1186 if (SrcReg == ARM::SP) {
1191 llvm_unreachable("Unsupported opcode for unwinding information");
1197 Offset = -MI->getOperand(2).getImm();
1201 Offset = MI->getOperand(2).getImm();
1204 Offset = MI->getOperand(2).getImm()*4;
1208 Offset = -MI->getOperand(2).getImm()*4;
1210 case ARM::tLDRpci: {
1211 // Grab the constpool index and check, whether it corresponds to
1212 // original or cloned constpool entry.
1213 unsigned CPI = MI->getOperand(1).getIndex();
1214 const MachineConstantPool *MCP = MF.getConstantPool();
1215 if (CPI >= MCP->getConstants().size())
1216 CPI = AFI.getOriginalCPIdx(CPI);
1217 assert(CPI != -1U && "Invalid constpool index");
1219 // Derive the actual offset.
1220 const MachineConstantPoolEntry &CPE = MCP->getConstants()[CPI];
1221 assert(!CPE.isMachineConstantPoolEntry() && "Invalid constpool entry");
1222 // FIXME: Check for user, it should be "add" instruction!
1223 Offset = -cast<ConstantInt>(CPE.Val.ConstVal)->getSExtValue();
1228 if (DstReg == FramePtr && FramePtr != ARM::SP)
1229 // Set-up of the frame pointer. Positive values correspond to "add"
1231 OutStreamer.EmitSetFP(FramePtr, ARM::SP, -Offset);
1232 else if (DstReg == ARM::SP) {
1233 // Change of SP by an offset. Positive values correspond to "sub"
1235 OutStreamer.EmitPad(Offset);
1238 llvm_unreachable("Unsupported opcode for unwinding information");
1240 } else if (DstReg == ARM::SP) {
1241 // FIXME: .movsp goes here
1243 llvm_unreachable("Unsupported opcode for unwinding information");
1247 llvm_unreachable("Unsupported opcode for unwinding information");
1252 extern cl::opt<bool> EnableARMEHABI;
1254 // Simple pseudo-instructions have their lowering (with expansion to real
1255 // instructions) auto-generated.
1256 #include "ARMGenMCPseudoLowering.inc"
1258 void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
1259 // If we just ended a constant pool, mark it as such.
1260 if (InConstantPool && MI->getOpcode() != ARM::CONSTPOOL_ENTRY) {
1261 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
1262 InConstantPool = false;
1265 // Emit unwinding stuff for frame-related instructions
1266 if (EnableARMEHABI && MI->getFlag(MachineInstr::FrameSetup))
1267 EmitUnwindingInstruction(MI);
1269 // Do any auto-generated pseudo lowerings.
1270 if (emitPseudoExpansionLowering(OutStreamer, MI))
1273 assert(!convertAddSubFlagsOpcode(MI->getOpcode()) &&
1274 "Pseudo flag setting opcode should be expanded early");
1276 // Check for manual lowerings.
1277 unsigned Opc = MI->getOpcode();
1279 case ARM::t2MOVi32imm: llvm_unreachable("Should be lowered by thumb2it pass");
1280 case ARM::DBG_VALUE: {
1281 if (isVerbose() && OutStreamer.hasRawTextSupport()) {
1282 SmallString<128> TmpStr;
1283 raw_svector_ostream OS(TmpStr);
1284 PrintDebugValueComment(MI, OS);
1285 OutStreamer.EmitRawText(StringRef(OS.str()));
1290 case ARM::tLEApcrel:
1291 case ARM::t2LEApcrel: {
1292 // FIXME: Need to also handle globals and externals
1294 TmpInst.setOpcode(MI->getOpcode() == ARM::t2LEApcrel ? ARM::t2ADR
1295 : (MI->getOpcode() == ARM::tLEApcrel ? ARM::tADR
1297 populateADROperands(TmpInst, MI->getOperand(0).getReg(),
1298 GetCPISymbol(MI->getOperand(1).getIndex()),
1299 MI->getOperand(2).getImm(), MI->getOperand(3).getReg(),
1301 OutStreamer.EmitInstruction(TmpInst);
1304 case ARM::LEApcrelJT:
1305 case ARM::tLEApcrelJT:
1306 case ARM::t2LEApcrelJT: {
1308 TmpInst.setOpcode(MI->getOpcode() == ARM::t2LEApcrelJT ? ARM::t2ADR
1309 : (MI->getOpcode() == ARM::tLEApcrelJT ? ARM::tADR
1311 populateADROperands(TmpInst, MI->getOperand(0).getReg(),
1312 GetARMJTIPICJumpTableLabel2(MI->getOperand(1).getIndex(),
1313 MI->getOperand(2).getImm()),
1314 MI->getOperand(3).getImm(), MI->getOperand(4).getReg(),
1316 OutStreamer.EmitInstruction(TmpInst);
1319 // Darwin call instructions are just normal call instructions with different
1320 // clobber semantics (they clobber R9).
1321 case ARM::BX_CALL: {
1324 TmpInst.setOpcode(ARM::MOVr);
1325 TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
1326 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1327 // Add predicate operands.
1328 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1329 TmpInst.addOperand(MCOperand::CreateReg(0));
1330 // Add 's' bit operand (always reg0 for this)
1331 TmpInst.addOperand(MCOperand::CreateReg(0));
1332 OutStreamer.EmitInstruction(TmpInst);
1336 TmpInst.setOpcode(ARM::BX);
1337 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1338 OutStreamer.EmitInstruction(TmpInst);
1342 case ARM::tBX_CALL: {
1345 TmpInst.setOpcode(ARM::tMOVr);
1346 TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
1347 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1348 // Add predicate operands.
1349 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1350 TmpInst.addOperand(MCOperand::CreateReg(0));
1351 OutStreamer.EmitInstruction(TmpInst);
1355 TmpInst.setOpcode(ARM::tBX);
1356 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1357 // Add predicate operands.
1358 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1359 TmpInst.addOperand(MCOperand::CreateReg(0));
1360 OutStreamer.EmitInstruction(TmpInst);
1364 case ARM::BMOVPCRX_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::MOVr);
1380 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1381 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1382 // Add predicate operands.
1383 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1384 TmpInst.addOperand(MCOperand::CreateReg(0));
1385 // Add 's' bit operand (always reg0 for this)
1386 TmpInst.addOperand(MCOperand::CreateReg(0));
1387 OutStreamer.EmitInstruction(TmpInst);
1391 case ARM::BMOVPCB_CALL: {
1394 TmpInst.setOpcode(ARM::MOVr);
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 // Add 's' bit operand (always reg0 for this)
1401 TmpInst.addOperand(MCOperand::CreateReg(0));
1402 OutStreamer.EmitInstruction(TmpInst);
1406 TmpInst.setOpcode(ARM::Bcc);
1407 const GlobalValue *GV = MI->getOperand(0).getGlobal();
1408 MCSymbol *GVSym = Mang->getSymbol(GV);
1409 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1410 TmpInst.addOperand(MCOperand::CreateExpr(GVSymExpr));
1411 // Add predicate operands.
1412 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1413 TmpInst.addOperand(MCOperand::CreateReg(0));
1414 OutStreamer.EmitInstruction(TmpInst);
1418 case ARM::t2BMOVPCB_CALL: {
1421 TmpInst.setOpcode(ARM::tMOVr);
1422 TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
1423 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1424 // Add predicate operands.
1425 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1426 TmpInst.addOperand(MCOperand::CreateReg(0));
1427 OutStreamer.EmitInstruction(TmpInst);
1431 TmpInst.setOpcode(ARM::t2B);
1432 const GlobalValue *GV = MI->getOperand(0).getGlobal();
1433 MCSymbol *GVSym = Mang->getSymbol(GV);
1434 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1435 TmpInst.addOperand(MCOperand::CreateExpr(GVSymExpr));
1436 // Add predicate operands.
1437 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1438 TmpInst.addOperand(MCOperand::CreateReg(0));
1439 OutStreamer.EmitInstruction(TmpInst);
1443 case ARM::MOVi16_ga_pcrel:
1444 case ARM::t2MOVi16_ga_pcrel: {
1446 TmpInst.setOpcode(Opc == ARM::MOVi16_ga_pcrel? ARM::MOVi16 : ARM::t2MOVi16);
1447 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1449 unsigned TF = MI->getOperand(1).getTargetFlags();
1450 bool isPIC = TF == ARMII::MO_LO16_NONLAZY_PIC;
1451 const GlobalValue *GV = MI->getOperand(1).getGlobal();
1452 MCSymbol *GVSym = GetARMGVSymbol(GV);
1453 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1455 MCSymbol *LabelSym = getPICLabel(MAI->getPrivateGlobalPrefix(),
1456 getFunctionNumber(),
1457 MI->getOperand(2).getImm(), OutContext);
1458 const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
1459 unsigned PCAdj = (Opc == ARM::MOVi16_ga_pcrel) ? 8 : 4;
1460 const MCExpr *PCRelExpr =
1461 ARMMCExpr::CreateLower16(MCBinaryExpr::CreateSub(GVSymExpr,
1462 MCBinaryExpr::CreateAdd(LabelSymExpr,
1463 MCConstantExpr::Create(PCAdj, OutContext),
1464 OutContext), OutContext), OutContext);
1465 TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
1467 const MCExpr *RefExpr= ARMMCExpr::CreateLower16(GVSymExpr, OutContext);
1468 TmpInst.addOperand(MCOperand::CreateExpr(RefExpr));
1471 // Add predicate operands.
1472 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1473 TmpInst.addOperand(MCOperand::CreateReg(0));
1474 // Add 's' bit operand (always reg0 for this)
1475 TmpInst.addOperand(MCOperand::CreateReg(0));
1476 OutStreamer.EmitInstruction(TmpInst);
1479 case ARM::MOVTi16_ga_pcrel:
1480 case ARM::t2MOVTi16_ga_pcrel: {
1482 TmpInst.setOpcode(Opc == ARM::MOVTi16_ga_pcrel
1483 ? ARM::MOVTi16 : ARM::t2MOVTi16);
1484 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1485 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1487 unsigned TF = MI->getOperand(2).getTargetFlags();
1488 bool isPIC = TF == ARMII::MO_HI16_NONLAZY_PIC;
1489 const GlobalValue *GV = MI->getOperand(2).getGlobal();
1490 MCSymbol *GVSym = GetARMGVSymbol(GV);
1491 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1493 MCSymbol *LabelSym = getPICLabel(MAI->getPrivateGlobalPrefix(),
1494 getFunctionNumber(),
1495 MI->getOperand(3).getImm(), OutContext);
1496 const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
1497 unsigned PCAdj = (Opc == ARM::MOVTi16_ga_pcrel) ? 8 : 4;
1498 const MCExpr *PCRelExpr =
1499 ARMMCExpr::CreateUpper16(MCBinaryExpr::CreateSub(GVSymExpr,
1500 MCBinaryExpr::CreateAdd(LabelSymExpr,
1501 MCConstantExpr::Create(PCAdj, OutContext),
1502 OutContext), OutContext), OutContext);
1503 TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
1505 const MCExpr *RefExpr= ARMMCExpr::CreateUpper16(GVSymExpr, OutContext);
1506 TmpInst.addOperand(MCOperand::CreateExpr(RefExpr));
1508 // Add predicate operands.
1509 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1510 TmpInst.addOperand(MCOperand::CreateReg(0));
1511 // Add 's' bit operand (always reg0 for this)
1512 TmpInst.addOperand(MCOperand::CreateReg(0));
1513 OutStreamer.EmitInstruction(TmpInst);
1516 case ARM::tPICADD: {
1517 // This is a pseudo op for a label + instruction sequence, which looks like:
1520 // This adds the address of LPC0 to r0.
1523 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1524 getFunctionNumber(), MI->getOperand(2).getImm(),
1527 // Form and emit the add.
1529 AddInst.setOpcode(ARM::tADDhirr);
1530 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1531 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1532 AddInst.addOperand(MCOperand::CreateReg(ARM::PC));
1533 // Add predicate operands.
1534 AddInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1535 AddInst.addOperand(MCOperand::CreateReg(0));
1536 OutStreamer.EmitInstruction(AddInst);
1540 // This is a pseudo op for a label + instruction sequence, which looks like:
1543 // This adds the address of LPC0 to r0.
1546 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1547 getFunctionNumber(), MI->getOperand(2).getImm(),
1550 // Form and emit the add.
1552 AddInst.setOpcode(ARM::ADDrr);
1553 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1554 AddInst.addOperand(MCOperand::CreateReg(ARM::PC));
1555 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1556 // Add predicate operands.
1557 AddInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
1558 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(4).getReg()));
1559 // Add 's' bit operand (always reg0 for this)
1560 AddInst.addOperand(MCOperand::CreateReg(0));
1561 OutStreamer.EmitInstruction(AddInst);
1571 case ARM::PICLDRSH: {
1572 // This is a pseudo op for a label + instruction sequence, which looks like:
1575 // The LCP0 label is referenced by a constant pool entry in order to get
1576 // a PC-relative address at the ldr instruction.
1579 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1580 getFunctionNumber(), MI->getOperand(2).getImm(),
1583 // Form and emit the load
1585 switch (MI->getOpcode()) {
1587 llvm_unreachable("Unexpected opcode!");
1588 case ARM::PICSTR: Opcode = ARM::STRrs; break;
1589 case ARM::PICSTRB: Opcode = ARM::STRBrs; break;
1590 case ARM::PICSTRH: Opcode = ARM::STRH; break;
1591 case ARM::PICLDR: Opcode = ARM::LDRrs; break;
1592 case ARM::PICLDRB: Opcode = ARM::LDRBrs; break;
1593 case ARM::PICLDRH: Opcode = ARM::LDRH; break;
1594 case ARM::PICLDRSB: Opcode = ARM::LDRSB; break;
1595 case ARM::PICLDRSH: Opcode = ARM::LDRSH; break;
1598 LdStInst.setOpcode(Opcode);
1599 LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1600 LdStInst.addOperand(MCOperand::CreateReg(ARM::PC));
1601 LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1602 LdStInst.addOperand(MCOperand::CreateImm(0));
1603 // Add predicate operands.
1604 LdStInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
1605 LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(4).getReg()));
1606 OutStreamer.EmitInstruction(LdStInst);
1610 case ARM::CONSTPOOL_ENTRY: {
1611 /// CONSTPOOL_ENTRY - This instruction represents a floating constant pool
1612 /// in the function. The first operand is the ID# for this instruction, the
1613 /// second is the index into the MachineConstantPool that this is, the third
1614 /// is the size in bytes of this constant pool entry.
1615 /// The required alignment is specified on the basic block holding this MI.
1616 unsigned LabelId = (unsigned)MI->getOperand(0).getImm();
1617 unsigned CPIdx = (unsigned)MI->getOperand(1).getIndex();
1619 // If this is the first entry of the pool, mark it.
1620 if (!InConstantPool) {
1621 OutStreamer.EmitDataRegion(MCDR_DataRegion);
1622 InConstantPool = true;
1625 OutStreamer.EmitLabel(GetCPISymbol(LabelId));
1627 const MachineConstantPoolEntry &MCPE = MCP->getConstants()[CPIdx];
1628 if (MCPE.isMachineConstantPoolEntry())
1629 EmitMachineConstantPoolValue(MCPE.Val.MachineCPVal);
1631 EmitGlobalConstant(MCPE.Val.ConstVal);
1634 case ARM::t2BR_JT: {
1635 // Lower and emit the instruction itself, then the jump table following it.
1637 TmpInst.setOpcode(ARM::tMOVr);
1638 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1639 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1640 // Add predicate operands.
1641 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1642 TmpInst.addOperand(MCOperand::CreateReg(0));
1643 OutStreamer.EmitInstruction(TmpInst);
1644 // Output the data for the jump table itself
1648 case ARM::t2TBB_JT: {
1649 // Lower and emit the instruction itself, then the jump table following it.
1652 TmpInst.setOpcode(ARM::t2TBB);
1653 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1654 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1655 // Add predicate operands.
1656 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1657 TmpInst.addOperand(MCOperand::CreateReg(0));
1658 OutStreamer.EmitInstruction(TmpInst);
1659 // Output the data for the jump table itself
1661 // Make sure the next instruction is 2-byte aligned.
1665 case ARM::t2TBH_JT: {
1666 // Lower and emit the instruction itself, then the jump table following it.
1669 TmpInst.setOpcode(ARM::t2TBH);
1670 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1671 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1672 // Add predicate operands.
1673 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1674 TmpInst.addOperand(MCOperand::CreateReg(0));
1675 OutStreamer.EmitInstruction(TmpInst);
1676 // Output the data for the jump table itself
1682 // Lower and emit the instruction itself, then the jump table following it.
1685 unsigned Opc = MI->getOpcode() == ARM::BR_JTr ?
1686 ARM::MOVr : ARM::tMOVr;
1687 TmpInst.setOpcode(Opc);
1688 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1689 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1690 // Add predicate operands.
1691 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1692 TmpInst.addOperand(MCOperand::CreateReg(0));
1693 // Add 's' bit operand (always reg0 for this)
1694 if (Opc == ARM::MOVr)
1695 TmpInst.addOperand(MCOperand::CreateReg(0));
1696 OutStreamer.EmitInstruction(TmpInst);
1698 // Make sure the Thumb jump table is 4-byte aligned.
1699 if (Opc == ARM::tMOVr)
1702 // Output the data for the jump table itself
1707 // Lower and emit the instruction itself, then the jump table following it.
1710 if (MI->getOperand(1).getReg() == 0) {
1712 TmpInst.setOpcode(ARM::LDRi12);
1713 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1714 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1715 TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(2).getImm()));
1717 TmpInst.setOpcode(ARM::LDRrs);
1718 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1719 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1720 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1721 TmpInst.addOperand(MCOperand::CreateImm(0));
1723 // Add predicate operands.
1724 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1725 TmpInst.addOperand(MCOperand::CreateReg(0));
1726 OutStreamer.EmitInstruction(TmpInst);
1728 // Output the data for the jump table itself
1732 case ARM::BR_JTadd: {
1733 // Lower and emit the instruction itself, then the jump table following it.
1734 // add pc, target, idx
1736 TmpInst.setOpcode(ARM::ADDrr);
1737 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1738 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1739 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1740 // Add predicate operands.
1741 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1742 TmpInst.addOperand(MCOperand::CreateReg(0));
1743 // Add 's' bit operand (always reg0 for this)
1744 TmpInst.addOperand(MCOperand::CreateReg(0));
1745 OutStreamer.EmitInstruction(TmpInst);
1747 // Output the data for the jump table itself
1752 // Non-Darwin binutils don't yet support the "trap" mnemonic.
1753 // FIXME: Remove this special case when they do.
1754 if (!Subtarget->isTargetDarwin()) {
1755 //.long 0xe7ffdefe @ trap
1756 uint32_t Val = 0xe7ffdefeUL;
1757 OutStreamer.AddComment("trap");
1758 OutStreamer.EmitIntValue(Val, 4);
1764 // Non-Darwin binutils don't yet support the "trap" mnemonic.
1765 // FIXME: Remove this special case when they do.
1766 if (!Subtarget->isTargetDarwin()) {
1767 //.short 57086 @ trap
1768 uint16_t Val = 0xdefe;
1769 OutStreamer.AddComment("trap");
1770 OutStreamer.EmitIntValue(Val, 2);
1775 case ARM::t2Int_eh_sjlj_setjmp:
1776 case ARM::t2Int_eh_sjlj_setjmp_nofp:
1777 case ARM::tInt_eh_sjlj_setjmp: {
1778 // Two incoming args: GPR:$src, GPR:$val
1781 // str $val, [$src, #4]
1786 unsigned SrcReg = MI->getOperand(0).getReg();
1787 unsigned ValReg = MI->getOperand(1).getReg();
1788 MCSymbol *Label = GetARMSJLJEHLabel();
1791 TmpInst.setOpcode(ARM::tMOVr);
1792 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1793 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1795 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1796 TmpInst.addOperand(MCOperand::CreateReg(0));
1797 OutStreamer.AddComment("eh_setjmp begin");
1798 OutStreamer.EmitInstruction(TmpInst);
1802 TmpInst.setOpcode(ARM::tADDi3);
1803 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1805 TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1806 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1807 TmpInst.addOperand(MCOperand::CreateImm(7));
1809 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1810 TmpInst.addOperand(MCOperand::CreateReg(0));
1811 OutStreamer.EmitInstruction(TmpInst);
1815 TmpInst.setOpcode(ARM::tSTRi);
1816 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1817 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1818 // The offset immediate is #4. The operand value is scaled by 4 for the
1819 // tSTR instruction.
1820 TmpInst.addOperand(MCOperand::CreateImm(1));
1822 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1823 TmpInst.addOperand(MCOperand::CreateReg(0));
1824 OutStreamer.EmitInstruction(TmpInst);
1828 TmpInst.setOpcode(ARM::tMOVi8);
1829 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1830 TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1831 TmpInst.addOperand(MCOperand::CreateImm(0));
1833 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1834 TmpInst.addOperand(MCOperand::CreateReg(0));
1835 OutStreamer.EmitInstruction(TmpInst);
1838 const MCExpr *SymbolExpr = MCSymbolRefExpr::Create(Label, OutContext);
1840 TmpInst.setOpcode(ARM::tB);
1841 TmpInst.addOperand(MCOperand::CreateExpr(SymbolExpr));
1842 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1843 TmpInst.addOperand(MCOperand::CreateReg(0));
1844 OutStreamer.EmitInstruction(TmpInst);
1848 TmpInst.setOpcode(ARM::tMOVi8);
1849 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1850 TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1851 TmpInst.addOperand(MCOperand::CreateImm(1));
1853 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1854 TmpInst.addOperand(MCOperand::CreateReg(0));
1855 OutStreamer.AddComment("eh_setjmp end");
1856 OutStreamer.EmitInstruction(TmpInst);
1858 OutStreamer.EmitLabel(Label);
1862 case ARM::Int_eh_sjlj_setjmp_nofp:
1863 case ARM::Int_eh_sjlj_setjmp: {
1864 // Two incoming args: GPR:$src, GPR:$val
1866 // str $val, [$src, #+4]
1870 unsigned SrcReg = MI->getOperand(0).getReg();
1871 unsigned ValReg = MI->getOperand(1).getReg();
1875 TmpInst.setOpcode(ARM::ADDri);
1876 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1877 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1878 TmpInst.addOperand(MCOperand::CreateImm(8));
1880 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1881 TmpInst.addOperand(MCOperand::CreateReg(0));
1882 // 's' bit operand (always reg0 for this).
1883 TmpInst.addOperand(MCOperand::CreateReg(0));
1884 OutStreamer.AddComment("eh_setjmp begin");
1885 OutStreamer.EmitInstruction(TmpInst);
1889 TmpInst.setOpcode(ARM::STRi12);
1890 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1891 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1892 TmpInst.addOperand(MCOperand::CreateImm(4));
1894 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1895 TmpInst.addOperand(MCOperand::CreateReg(0));
1896 OutStreamer.EmitInstruction(TmpInst);
1900 TmpInst.setOpcode(ARM::MOVi);
1901 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1902 TmpInst.addOperand(MCOperand::CreateImm(0));
1904 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1905 TmpInst.addOperand(MCOperand::CreateReg(0));
1906 // 's' bit operand (always reg0 for this).
1907 TmpInst.addOperand(MCOperand::CreateReg(0));
1908 OutStreamer.EmitInstruction(TmpInst);
1912 TmpInst.setOpcode(ARM::ADDri);
1913 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1914 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1915 TmpInst.addOperand(MCOperand::CreateImm(0));
1917 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1918 TmpInst.addOperand(MCOperand::CreateReg(0));
1919 // 's' bit operand (always reg0 for this).
1920 TmpInst.addOperand(MCOperand::CreateReg(0));
1921 OutStreamer.EmitInstruction(TmpInst);
1925 TmpInst.setOpcode(ARM::MOVi);
1926 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1927 TmpInst.addOperand(MCOperand::CreateImm(1));
1929 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1930 TmpInst.addOperand(MCOperand::CreateReg(0));
1931 // 's' bit operand (always reg0 for this).
1932 TmpInst.addOperand(MCOperand::CreateReg(0));
1933 OutStreamer.AddComment("eh_setjmp end");
1934 OutStreamer.EmitInstruction(TmpInst);
1938 case ARM::Int_eh_sjlj_longjmp: {
1939 // ldr sp, [$src, #8]
1940 // ldr $scratch, [$src, #4]
1943 unsigned SrcReg = MI->getOperand(0).getReg();
1944 unsigned ScratchReg = MI->getOperand(1).getReg();
1947 TmpInst.setOpcode(ARM::LDRi12);
1948 TmpInst.addOperand(MCOperand::CreateReg(ARM::SP));
1949 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1950 TmpInst.addOperand(MCOperand::CreateImm(8));
1952 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1953 TmpInst.addOperand(MCOperand::CreateReg(0));
1954 OutStreamer.EmitInstruction(TmpInst);
1958 TmpInst.setOpcode(ARM::LDRi12);
1959 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1960 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1961 TmpInst.addOperand(MCOperand::CreateImm(4));
1963 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1964 TmpInst.addOperand(MCOperand::CreateReg(0));
1965 OutStreamer.EmitInstruction(TmpInst);
1969 TmpInst.setOpcode(ARM::LDRi12);
1970 TmpInst.addOperand(MCOperand::CreateReg(ARM::R7));
1971 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1972 TmpInst.addOperand(MCOperand::CreateImm(0));
1974 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1975 TmpInst.addOperand(MCOperand::CreateReg(0));
1976 OutStreamer.EmitInstruction(TmpInst);
1980 TmpInst.setOpcode(ARM::BX);
1981 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1983 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1984 TmpInst.addOperand(MCOperand::CreateReg(0));
1985 OutStreamer.EmitInstruction(TmpInst);
1989 case ARM::tInt_eh_sjlj_longjmp: {
1990 // ldr $scratch, [$src, #8]
1992 // ldr $scratch, [$src, #4]
1995 unsigned SrcReg = MI->getOperand(0).getReg();
1996 unsigned ScratchReg = MI->getOperand(1).getReg();
1999 TmpInst.setOpcode(ARM::tLDRi);
2000 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
2001 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
2002 // The offset immediate is #8. The operand value is scaled by 4 for the
2003 // tLDR instruction.
2004 TmpInst.addOperand(MCOperand::CreateImm(2));
2006 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
2007 TmpInst.addOperand(MCOperand::CreateReg(0));
2008 OutStreamer.EmitInstruction(TmpInst);
2012 TmpInst.setOpcode(ARM::tMOVr);
2013 TmpInst.addOperand(MCOperand::CreateReg(ARM::SP));
2014 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
2016 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
2017 TmpInst.addOperand(MCOperand::CreateReg(0));
2018 OutStreamer.EmitInstruction(TmpInst);
2022 TmpInst.setOpcode(ARM::tLDRi);
2023 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
2024 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
2025 TmpInst.addOperand(MCOperand::CreateImm(1));
2027 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
2028 TmpInst.addOperand(MCOperand::CreateReg(0));
2029 OutStreamer.EmitInstruction(TmpInst);
2033 TmpInst.setOpcode(ARM::tLDRi);
2034 TmpInst.addOperand(MCOperand::CreateReg(ARM::R7));
2035 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
2036 TmpInst.addOperand(MCOperand::CreateImm(0));
2038 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
2039 TmpInst.addOperand(MCOperand::CreateReg(0));
2040 OutStreamer.EmitInstruction(TmpInst);
2044 TmpInst.setOpcode(ARM::tBX);
2045 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
2047 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
2048 TmpInst.addOperand(MCOperand::CreateReg(0));
2049 OutStreamer.EmitInstruction(TmpInst);
2056 LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
2058 OutStreamer.EmitInstruction(TmpInst);
2061 //===----------------------------------------------------------------------===//
2062 // Target Registry Stuff
2063 //===----------------------------------------------------------------------===//
2065 // Force static initialization.
2066 extern "C" void LLVMInitializeARMAsmPrinter() {
2067 RegisterAsmPrinter<ARMAsmPrinter> X(TheARMTarget);
2068 RegisterAsmPrinter<ARMAsmPrinter> Y(TheThumbTarget);