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"
17 #include "ARMAsmPrinter.h"
18 #include "ARMAddressingModes.h"
19 #include "ARMBuildAttrs.h"
20 #include "ARMBaseRegisterInfo.h"
21 #include "ARMConstantPoolValue.h"
22 #include "ARMMachineFunctionInfo.h"
23 #include "ARMMCExpr.h"
24 #include "ARMTargetMachine.h"
25 #include "ARMTargetObjectFile.h"
26 #include "InstPrinter/ARMInstPrinter.h"
27 #include "llvm/Analysis/DebugInfo.h"
28 #include "llvm/Constants.h"
29 #include "llvm/Module.h"
30 #include "llvm/Type.h"
31 #include "llvm/Assembly/Writer.h"
32 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
33 #include "llvm/CodeGen/MachineFunctionPass.h"
34 #include "llvm/CodeGen/MachineJumpTableInfo.h"
35 #include "llvm/MC/MCAsmInfo.h"
36 #include "llvm/MC/MCAssembler.h"
37 #include "llvm/MC/MCContext.h"
38 #include "llvm/MC/MCExpr.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/Target/TargetData.h"
46 #include "llvm/Target/TargetMachine.h"
47 #include "llvm/Target/TargetOptions.h"
48 #include "llvm/Target/TargetRegistry.h"
49 #include "llvm/ADT/SmallPtrSet.h"
50 #include "llvm/ADT/SmallString.h"
51 #include "llvm/ADT/StringExtras.h"
52 #include "llvm/Support/CommandLine.h"
53 #include "llvm/Support/Debug.h"
54 #include "llvm/Support/ErrorHandling.h"
55 #include "llvm/Support/raw_ostream.h"
61 // Per section and per symbol attributes are not supported.
62 // To implement them we would need the ability to delay this emission
63 // until the assembly file is fully parsed/generated as only then do we
64 // know the symbol and section numbers.
65 class AttributeEmitter {
67 virtual void MaybeSwitchVendor(StringRef Vendor) = 0;
68 virtual void EmitAttribute(unsigned Attribute, unsigned Value) = 0;
69 virtual void EmitTextAttribute(unsigned Attribute, StringRef String) = 0;
70 virtual void Finish() = 0;
71 virtual ~AttributeEmitter() {}
74 class AsmAttributeEmitter : public AttributeEmitter {
78 AsmAttributeEmitter(MCStreamer &Streamer_) : Streamer(Streamer_) {}
79 void MaybeSwitchVendor(StringRef Vendor) { }
81 void EmitAttribute(unsigned Attribute, unsigned Value) {
82 Streamer.EmitRawText("\t.eabi_attribute " +
83 Twine(Attribute) + ", " + Twine(Value));
86 void EmitTextAttribute(unsigned Attribute, StringRef String) {
88 case ARMBuildAttrs::CPU_name:
89 Streamer.EmitRawText(StringRef("\t.cpu ") + LowercaseString(String));
91 /* GAS requires .fpu to be emitted regardless of EABI attribute */
92 case ARMBuildAttrs::Advanced_SIMD_arch:
93 case ARMBuildAttrs::VFP_arch:
94 Streamer.EmitRawText(StringRef("\t.fpu ") + LowercaseString(String));
96 default: assert(0 && "Unsupported Text attribute in ASM Mode"); break;
102 class ObjectAttributeEmitter : public AttributeEmitter {
103 MCObjectStreamer &Streamer;
104 StringRef CurrentVendor;
105 SmallString<64> Contents;
108 ObjectAttributeEmitter(MCObjectStreamer &Streamer_) :
109 Streamer(Streamer_), CurrentVendor("") { }
111 void MaybeSwitchVendor(StringRef Vendor) {
112 assert(!Vendor.empty() && "Vendor cannot be empty.");
114 if (CurrentVendor.empty())
115 CurrentVendor = Vendor;
116 else if (CurrentVendor == Vendor)
121 CurrentVendor = Vendor;
123 assert(Contents.size() == 0);
126 void EmitAttribute(unsigned Attribute, unsigned Value) {
127 // FIXME: should be ULEB
128 Contents += Attribute;
132 void EmitTextAttribute(unsigned Attribute, StringRef String) {
133 Contents += Attribute;
134 Contents += UppercaseString(String);
139 const size_t ContentsSize = Contents.size();
141 // Vendor size + Vendor name + '\0'
142 const size_t VendorHeaderSize = 4 + CurrentVendor.size() + 1;
145 const size_t TagHeaderSize = 1 + 4;
147 Streamer.EmitIntValue(VendorHeaderSize + TagHeaderSize + ContentsSize, 4);
148 Streamer.EmitBytes(CurrentVendor, 0);
149 Streamer.EmitIntValue(0, 1); // '\0'
151 Streamer.EmitIntValue(ARMBuildAttrs::File, 1);
152 Streamer.EmitIntValue(TagHeaderSize + ContentsSize, 4);
154 Streamer.EmitBytes(Contents, 0);
160 } // end of anonymous namespace
162 MachineLocation ARMAsmPrinter::
163 getDebugValueLocation(const MachineInstr *MI) const {
164 MachineLocation Location;
165 assert(MI->getNumOperands() == 4 && "Invalid no. of machine operands!");
166 // Frame address. Currently handles register +- offset only.
167 if (MI->getOperand(0).isReg() && MI->getOperand(1).isImm())
168 Location.set(MI->getOperand(0).getReg(), MI->getOperand(1).getImm());
170 DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n");
175 /// getDwarfRegOpSize - get size required to emit given machine location using
177 unsigned ARMAsmPrinter::getDwarfRegOpSize(const MachineLocation &MLoc) const {
178 const TargetRegisterInfo *RI = TM.getRegisterInfo();
179 if (RI->getDwarfRegNum(MLoc.getReg(), false) != -1)
180 return AsmPrinter::getDwarfRegOpSize(MLoc);
182 unsigned Reg = MLoc.getReg();
183 if (Reg >= ARM::S0 && Reg <= ARM::S31) {
184 assert(ARM::S0 + 31 == ARM::S31 && "Unexpected ARM S register numbering");
185 // S registers are described as bit-pieces of a register
186 // S[2x] = DW_OP_regx(256 + (x>>1)) DW_OP_bit_piece(32, 0)
187 // S[2x+1] = DW_OP_regx(256 + (x>>1)) DW_OP_bit_piece(32, 32)
189 unsigned SReg = Reg - ARM::S0;
190 unsigned Rx = 256 + (SReg >> 1);
191 // DW_OP_regx + ULEB + DW_OP_bit_piece + ULEB + ULEB
192 // 1 + ULEB(Rx) + 1 + 1 + 1
193 return 4 + MCAsmInfo::getULEB128Size(Rx);
196 if (Reg >= ARM::Q0 && Reg <= ARM::Q15) {
197 assert(ARM::Q0 + 15 == ARM::Q15 && "Unexpected ARM Q register numbering");
198 // Q registers Q0-Q15 are described by composing two D registers together.
199 // Qx = DW_OP_regx(256+2x) DW_OP_piece(8) DW_OP_regx(256+2x+1) DW_OP_piece(8)
201 unsigned QReg = Reg - ARM::Q0;
202 unsigned D1 = 256 + 2 * QReg;
203 unsigned D2 = D1 + 1;
205 // DW_OP_regx + ULEB + DW_OP_piece + ULEB(8) +
206 // DW_OP_regx + ULEB + DW_OP_piece + ULEB(8);
207 // 6 + ULEB(D1) + ULEB(D2)
208 return 6 + MCAsmInfo::getULEB128Size(D1) + MCAsmInfo::getULEB128Size(D2);
214 /// EmitDwarfRegOp - Emit dwarf register operation.
215 void ARMAsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const {
216 const TargetRegisterInfo *RI = TM.getRegisterInfo();
217 if (RI->getDwarfRegNum(MLoc.getReg(), false) != -1)
218 AsmPrinter::EmitDwarfRegOp(MLoc);
220 unsigned Reg = MLoc.getReg();
221 if (Reg >= ARM::S0 && Reg <= ARM::S31) {
222 assert(ARM::S0 + 31 == ARM::S31 && "Unexpected ARM S register numbering");
223 // S registers are described as bit-pieces of a register
224 // S[2x] = DW_OP_regx(256 + (x>>1)) DW_OP_bit_piece(32, 0)
225 // S[2x+1] = DW_OP_regx(256 + (x>>1)) DW_OP_bit_piece(32, 32)
227 unsigned SReg = Reg - ARM::S0;
228 bool odd = SReg & 0x1;
229 unsigned Rx = 256 + (SReg >> 1);
231 OutStreamer.AddComment("DW_OP_regx for S register");
232 EmitInt8(dwarf::DW_OP_regx);
234 OutStreamer.AddComment(Twine(SReg));
238 OutStreamer.AddComment("DW_OP_bit_piece 32 32");
239 EmitInt8(dwarf::DW_OP_bit_piece);
243 OutStreamer.AddComment("DW_OP_bit_piece 32 0");
244 EmitInt8(dwarf::DW_OP_bit_piece);
248 } else if (Reg >= ARM::Q0 && Reg <= ARM::Q15) {
249 assert(ARM::Q0 + 15 == ARM::Q15 && "Unexpected ARM Q register numbering");
250 // Q registers Q0-Q15 are described by composing two D registers together.
251 // Qx = DW_OP_regx(256+2x) DW_OP_piece(8) DW_OP_regx(256+2x+1) DW_OP_piece(8)
253 unsigned QReg = Reg - ARM::Q0;
254 unsigned D1 = 256 + 2 * QReg;
255 unsigned D2 = D1 + 1;
257 OutStreamer.AddComment("DW_OP_regx for Q register: D1");
258 EmitInt8(dwarf::DW_OP_regx);
260 OutStreamer.AddComment("DW_OP_piece 8");
261 EmitInt8(dwarf::DW_OP_piece);
264 OutStreamer.AddComment("DW_OP_regx for Q register: D2");
265 EmitInt8(dwarf::DW_OP_regx);
267 OutStreamer.AddComment("DW_OP_piece 8");
268 EmitInt8(dwarf::DW_OP_piece);
274 void ARMAsmPrinter::EmitFunctionEntryLabel() {
275 if (AFI->isThumbFunction()) {
276 OutStreamer.EmitAssemblerFlag(MCAF_Code16);
277 OutStreamer.EmitThumbFunc(CurrentFnSym);
280 OutStreamer.EmitLabel(CurrentFnSym);
283 /// runOnMachineFunction - This uses the EmitInstruction()
284 /// method to print assembly for each instruction.
286 bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
287 AFI = MF.getInfo<ARMFunctionInfo>();
288 MCP = MF.getConstantPool();
290 return AsmPrinter::runOnMachineFunction(MF);
293 void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
294 raw_ostream &O, const char *Modifier) {
295 const MachineOperand &MO = MI->getOperand(OpNum);
296 unsigned TF = MO.getTargetFlags();
298 switch (MO.getType()) {
300 assert(0 && "<unknown operand type>");
301 case MachineOperand::MO_Register: {
302 unsigned Reg = MO.getReg();
303 assert(TargetRegisterInfo::isPhysicalRegister(Reg));
304 assert(!MO.getSubReg() && "Subregs should be eliminated!");
305 O << ARMInstPrinter::getRegisterName(Reg);
308 case MachineOperand::MO_Immediate: {
309 int64_t Imm = MO.getImm();
311 if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
312 (TF == ARMII::MO_LO16))
314 else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
315 (TF == ARMII::MO_HI16))
320 case MachineOperand::MO_MachineBasicBlock:
321 O << *MO.getMBB()->getSymbol();
323 case MachineOperand::MO_GlobalAddress: {
324 const GlobalValue *GV = MO.getGlobal();
325 if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
326 (TF & ARMII::MO_LO16))
328 else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
329 (TF & ARMII::MO_HI16))
331 O << *Mang->getSymbol(GV);
333 printOffset(MO.getOffset(), O);
334 if (TF == ARMII::MO_PLT)
338 case MachineOperand::MO_ExternalSymbol: {
339 O << *GetExternalSymbolSymbol(MO.getSymbolName());
340 if (TF == ARMII::MO_PLT)
344 case MachineOperand::MO_ConstantPoolIndex:
345 O << *GetCPISymbol(MO.getIndex());
347 case MachineOperand::MO_JumpTableIndex:
348 O << *GetJTISymbol(MO.getIndex());
353 //===--------------------------------------------------------------------===//
355 MCSymbol *ARMAsmPrinter::
356 GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2,
357 const MachineBasicBlock *MBB) const {
358 SmallString<60> Name;
359 raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
360 << getFunctionNumber() << '_' << uid << '_' << uid2
361 << "_set_" << MBB->getNumber();
362 return OutContext.GetOrCreateSymbol(Name.str());
365 MCSymbol *ARMAsmPrinter::
366 GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const {
367 SmallString<60> Name;
368 raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "JTI"
369 << getFunctionNumber() << '_' << uid << '_' << uid2;
370 return OutContext.GetOrCreateSymbol(Name.str());
374 MCSymbol *ARMAsmPrinter::GetARMSJLJEHLabel(void) const {
375 SmallString<60> Name;
376 raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "SJLJEH"
377 << getFunctionNumber();
378 return OutContext.GetOrCreateSymbol(Name.str());
381 bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
382 unsigned AsmVariant, const char *ExtraCode,
384 // Does this asm operand have a single letter operand modifier?
385 if (ExtraCode && ExtraCode[0]) {
386 if (ExtraCode[1] != 0) return true; // Unknown modifier.
388 switch (ExtraCode[0]) {
389 default: return true; // Unknown modifier.
390 case 'a': // Print as a memory address.
391 if (MI->getOperand(OpNum).isReg()) {
393 << ARMInstPrinter::getRegisterName(MI->getOperand(OpNum).getReg())
398 case 'c': // Don't print "#" before an immediate operand.
399 if (!MI->getOperand(OpNum).isImm())
401 O << MI->getOperand(OpNum).getImm();
403 case 'P': // Print a VFP double precision register.
404 case 'q': // Print a NEON quad precision register.
405 printOperand(MI, OpNum, O);
407 case 'y': // Print a VFP single precision register as indexed double.
408 // This uses the ordering of the alias table to get the first 'd' register
409 // that overlaps the 's' register. Also, s0 is an odd register, hence the
410 // odd modulus check below.
411 if (MI->getOperand(OpNum).isReg()) {
412 unsigned Reg = MI->getOperand(OpNum).getReg();
413 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
414 O << ARMInstPrinter::getRegisterName(TRI->getAliasSet(Reg)[0]) <<
415 (((Reg % 2) == 1) ? "[0]" : "[1]");
418 // Fallthrough to unsupported.
422 // These modifiers are not yet supported.
427 printOperand(MI, OpNum, O);
431 bool ARMAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
432 unsigned OpNum, unsigned AsmVariant,
433 const char *ExtraCode,
435 if (ExtraCode && ExtraCode[0])
436 return true; // Unknown modifier.
438 const MachineOperand &MO = MI->getOperand(OpNum);
439 assert(MO.isReg() && "unexpected inline asm memory operand");
440 O << "[" << ARMInstPrinter::getRegisterName(MO.getReg()) << "]";
444 void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) {
445 if (Subtarget->isTargetDarwin()) {
446 Reloc::Model RelocM = TM.getRelocationModel();
447 if (RelocM == Reloc::PIC_ || RelocM == Reloc::DynamicNoPIC) {
448 // Declare all the text sections up front (before the DWARF sections
449 // emitted by AsmPrinter::doInitialization) so the assembler will keep
450 // them together at the beginning of the object file. This helps
451 // avoid out-of-range branches that are due a fundamental limitation of
452 // the way symbol offsets are encoded with the current Darwin ARM
454 const TargetLoweringObjectFileMachO &TLOFMacho =
455 static_cast<const TargetLoweringObjectFileMachO &>(
456 getObjFileLowering());
457 OutStreamer.SwitchSection(TLOFMacho.getTextSection());
458 OutStreamer.SwitchSection(TLOFMacho.getTextCoalSection());
459 OutStreamer.SwitchSection(TLOFMacho.getConstTextCoalSection());
460 if (RelocM == Reloc::DynamicNoPIC) {
461 const MCSection *sect =
462 OutContext.getMachOSection("__TEXT", "__symbol_stub4",
463 MCSectionMachO::S_SYMBOL_STUBS,
464 12, SectionKind::getText());
465 OutStreamer.SwitchSection(sect);
467 const MCSection *sect =
468 OutContext.getMachOSection("__TEXT", "__picsymbolstub4",
469 MCSectionMachO::S_SYMBOL_STUBS,
470 16, SectionKind::getText());
471 OutStreamer.SwitchSection(sect);
473 const MCSection *StaticInitSect =
474 OutContext.getMachOSection("__TEXT", "__StaticInit",
475 MCSectionMachO::S_REGULAR |
476 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
477 SectionKind::getText());
478 OutStreamer.SwitchSection(StaticInitSect);
482 // Use unified assembler syntax.
483 OutStreamer.EmitAssemblerFlag(MCAF_SyntaxUnified);
485 // Emit ARM Build Attributes
486 if (Subtarget->isTargetELF()) {
493 void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
494 if (Subtarget->isTargetDarwin()) {
495 // All darwin targets use mach-o.
496 const TargetLoweringObjectFileMachO &TLOFMacho =
497 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
498 MachineModuleInfoMachO &MMIMacho =
499 MMI->getObjFileInfo<MachineModuleInfoMachO>();
501 // Output non-lazy-pointers for external and common global variables.
502 MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetGVStubList();
504 if (!Stubs.empty()) {
505 // Switch with ".non_lazy_symbol_pointer" directive.
506 OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
508 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
510 OutStreamer.EmitLabel(Stubs[i].first);
511 // .indirect_symbol _foo
512 MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
513 OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),MCSA_IndirectSymbol);
516 // External to current translation unit.
517 OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
519 // Internal to current translation unit.
521 // When we place the LSDA into the TEXT section, the type info
522 // pointers need to be indirect and pc-rel. We accomplish this by
523 // using NLPs; however, sometimes the types are local to the file.
524 // We need to fill in the value for the NLP in those cases.
525 OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
527 4/*size*/, 0/*addrspace*/);
531 OutStreamer.AddBlankLine();
534 Stubs = MMIMacho.GetHiddenGVStubList();
535 if (!Stubs.empty()) {
536 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
538 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
540 OutStreamer.EmitLabel(Stubs[i].first);
542 OutStreamer.EmitValue(MCSymbolRefExpr::
543 Create(Stubs[i].second.getPointer(),
545 4/*size*/, 0/*addrspace*/);
549 OutStreamer.AddBlankLine();
552 // Funny Darwin hack: This flag tells the linker that no global symbols
553 // contain code that falls through to other global symbols (e.g. the obvious
554 // implementation of multiple entry points). If this doesn't occur, the
555 // linker can safely perform dead code stripping. Since LLVM never
556 // generates code that does this, it is always safe to set.
557 OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
561 //===----------------------------------------------------------------------===//
562 // Helper routines for EmitStartOfAsmFile() and EmitEndOfAsmFile()
564 // The following seem like one-off assembler flags, but they actually need
565 // to appear in the .ARM.attributes section in ELF.
566 // Instead of subclassing the MCELFStreamer, we do the work here.
568 void ARMAsmPrinter::emitAttributes() {
570 emitARMAttributeSection();
572 /* GAS expect .fpu to be emitted, regardless of VFP build attribute */
573 bool emitFPU = false;
574 AttributeEmitter *AttrEmitter;
575 if (OutStreamer.hasRawTextSupport()) {
576 AttrEmitter = new AsmAttributeEmitter(OutStreamer);
579 MCObjectStreamer &O = static_cast<MCObjectStreamer&>(OutStreamer);
580 AttrEmitter = new ObjectAttributeEmitter(O);
583 AttrEmitter->MaybeSwitchVendor("aeabi");
585 std::string CPUString = Subtarget->getCPUString();
587 if (CPUString == "cortex-a8" ||
588 Subtarget->isCortexA8()) {
589 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::CPU_name, "cortex-a8");
590 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v7);
591 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch_profile,
592 ARMBuildAttrs::ApplicationProfile);
593 AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
594 ARMBuildAttrs::Allowed);
595 AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
596 ARMBuildAttrs::AllowThumb32);
597 // Fixme: figure out when this is emitted.
598 //AttrEmitter->EmitAttribute(ARMBuildAttrs::WMMX_arch,
599 // ARMBuildAttrs::AllowWMMXv1);
602 /// ADD additional Else-cases here!
603 } else if (CPUString == "xscale") {
604 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v5TEJ);
605 AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
606 ARMBuildAttrs::Allowed);
607 AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
608 ARMBuildAttrs::Allowed);
609 } else if (CPUString == "generic") {
610 // FIXME: Why these defaults?
611 AttrEmitter->EmitAttribute(ARMBuildAttrs::CPU_arch, ARMBuildAttrs::v4T);
612 AttrEmitter->EmitAttribute(ARMBuildAttrs::ARM_ISA_use,
613 ARMBuildAttrs::Allowed);
614 AttrEmitter->EmitAttribute(ARMBuildAttrs::THUMB_ISA_use,
615 ARMBuildAttrs::Allowed);
618 if (Subtarget->hasNEON() && emitFPU) {
619 /* NEON is not exactly a VFP architecture, but GAS emit one of
620 * neon/vfpv3/vfpv2 for .fpu parameters */
621 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::Advanced_SIMD_arch, "neon");
622 /* If emitted for NEON, omit from VFP below, since you can have both
623 * NEON and VFP in build attributes but only one .fpu */
628 if (Subtarget->hasVFP3()) {
629 AttrEmitter->EmitAttribute(ARMBuildAttrs::VFP_arch,
630 ARMBuildAttrs::AllowFPv3A);
632 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::VFP_arch, "vfpv3");
635 } else if (Subtarget->hasVFP2()) {
636 AttrEmitter->EmitAttribute(ARMBuildAttrs::VFP_arch,
637 ARMBuildAttrs::AllowFPv2);
639 AttrEmitter->EmitTextAttribute(ARMBuildAttrs::VFP_arch, "vfpv2");
642 /* TODO: ARMBuildAttrs::Allowed is not completely accurate,
643 * since NEON can have 1 (allowed) or 2 (fused MAC operations) */
644 if (Subtarget->hasNEON()) {
645 AttrEmitter->EmitAttribute(ARMBuildAttrs::Advanced_SIMD_arch,
646 ARMBuildAttrs::Allowed);
649 // Signal various FP modes.
651 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_denormal,
652 ARMBuildAttrs::Allowed);
653 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_exceptions,
654 ARMBuildAttrs::Allowed);
657 if (NoInfsFPMath && NoNaNsFPMath)
658 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_number_model,
659 ARMBuildAttrs::Allowed);
661 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_FP_number_model,
662 ARMBuildAttrs::AllowIEE754);
664 // FIXME: add more flags to ARMBuildAttrs.h
665 // 8-bytes alignment stuff.
666 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_align8_needed, 1);
667 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_align8_preserved, 1);
669 // Hard float. Use both S and D registers and conform to AAPCS-VFP.
670 if (Subtarget->isAAPCS_ABI() && FloatABIType == FloatABI::Hard) {
671 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_HardFP_use, 3);
672 AttrEmitter->EmitAttribute(ARMBuildAttrs::ABI_VFP_args, 1);
674 // FIXME: Should we signal R9 usage?
676 if (Subtarget->hasDivide())
677 AttrEmitter->EmitAttribute(ARMBuildAttrs::DIV_use, 1);
679 AttrEmitter->Finish();
683 void ARMAsmPrinter::emitARMAttributeSection() {
685 // [ <section-length> "vendor-name"
686 // [ <file-tag> <size> <attribute>*
687 // | <section-tag> <size> <section-number>* 0 <attribute>*
688 // | <symbol-tag> <size> <symbol-number>* 0 <attribute>*
692 if (OutStreamer.hasRawTextSupport())
695 const ARMElfTargetObjectFile &TLOFELF =
696 static_cast<const ARMElfTargetObjectFile &>
697 (getObjFileLowering());
699 OutStreamer.SwitchSection(TLOFELF.getAttributesSection());
702 OutStreamer.EmitIntValue(0x41, 1);
705 //===----------------------------------------------------------------------===//
707 static MCSymbol *getPICLabel(const char *Prefix, unsigned FunctionNumber,
708 unsigned LabelId, MCContext &Ctx) {
710 MCSymbol *Label = Ctx.GetOrCreateSymbol(Twine(Prefix)
711 + "PC" + Twine(FunctionNumber) + "_" + Twine(LabelId));
715 static MCSymbolRefExpr::VariantKind
716 getModifierVariantKind(ARMCP::ARMCPModifier Modifier) {
718 default: llvm_unreachable("Unknown modifier!");
719 case ARMCP::no_modifier: return MCSymbolRefExpr::VK_None;
720 case ARMCP::TLSGD: return MCSymbolRefExpr::VK_ARM_TLSGD;
721 case ARMCP::TPOFF: return MCSymbolRefExpr::VK_ARM_TPOFF;
722 case ARMCP::GOTTPOFF: return MCSymbolRefExpr::VK_ARM_GOTTPOFF;
723 case ARMCP::GOT: return MCSymbolRefExpr::VK_ARM_GOT;
724 case ARMCP::GOTOFF: return MCSymbolRefExpr::VK_ARM_GOTOFF;
726 return MCSymbolRefExpr::VK_None;
729 MCSymbol *ARMAsmPrinter::GetARMGVSymbol(const GlobalValue *GV) {
730 bool isIndirect = Subtarget->isTargetDarwin() &&
731 Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
733 return Mang->getSymbol(GV);
735 // FIXME: Remove this when Darwin transition to @GOT like syntax.
736 MCSymbol *MCSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
737 MachineModuleInfoMachO &MMIMachO =
738 MMI->getObjFileInfo<MachineModuleInfoMachO>();
739 MachineModuleInfoImpl::StubValueTy &StubSym =
740 GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(MCSym) :
741 MMIMachO.getGVStubEntry(MCSym);
742 if (StubSym.getPointer() == 0)
743 StubSym = MachineModuleInfoImpl::
744 StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
749 EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
750 int Size = TM.getTargetData()->getTypeAllocSize(MCPV->getType());
752 ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
755 if (ACPV->isLSDA()) {
756 SmallString<128> Str;
757 raw_svector_ostream OS(Str);
758 OS << MAI->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
759 MCSym = OutContext.GetOrCreateSymbol(OS.str());
760 } else if (ACPV->isBlockAddress()) {
761 MCSym = GetBlockAddressSymbol(ACPV->getBlockAddress());
762 } else if (ACPV->isGlobalValue()) {
763 const GlobalValue *GV = ACPV->getGV();
764 MCSym = GetARMGVSymbol(GV);
766 assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
767 MCSym = GetExternalSymbolSymbol(ACPV->getSymbol());
770 // Create an MCSymbol for the reference.
772 MCSymbolRefExpr::Create(MCSym, getModifierVariantKind(ACPV->getModifier()),
775 if (ACPV->getPCAdjustment()) {
776 MCSymbol *PCLabel = getPICLabel(MAI->getPrivateGlobalPrefix(),
780 const MCExpr *PCRelExpr = MCSymbolRefExpr::Create(PCLabel, OutContext);
782 MCBinaryExpr::CreateAdd(PCRelExpr,
783 MCConstantExpr::Create(ACPV->getPCAdjustment(),
786 if (ACPV->mustAddCurrentAddress()) {
787 // We want "(<expr> - .)", but MC doesn't have a concept of the '.'
788 // label, so just emit a local label end reference that instead.
789 MCSymbol *DotSym = OutContext.CreateTempSymbol();
790 OutStreamer.EmitLabel(DotSym);
791 const MCExpr *DotExpr = MCSymbolRefExpr::Create(DotSym, OutContext);
792 PCRelExpr = MCBinaryExpr::CreateSub(PCRelExpr, DotExpr, OutContext);
794 Expr = MCBinaryExpr::CreateSub(Expr, PCRelExpr, OutContext);
796 OutStreamer.EmitValue(Expr, Size);
799 void ARMAsmPrinter::EmitJumpTable(const MachineInstr *MI) {
800 unsigned Opcode = MI->getOpcode();
802 if (Opcode == ARM::BR_JTadd)
804 else if (Opcode == ARM::BR_JTm)
807 const MachineOperand &MO1 = MI->getOperand(OpNum);
808 const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
809 unsigned JTI = MO1.getIndex();
811 // Emit a label for the jump table.
812 MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
813 OutStreamer.EmitLabel(JTISymbol);
815 // Emit each entry of the table.
816 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
817 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
818 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
820 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
821 MachineBasicBlock *MBB = JTBBs[i];
822 // Construct an MCExpr for the entry. We want a value of the form:
823 // (BasicBlockAddr - TableBeginAddr)
825 // For example, a table with entries jumping to basic blocks BB0 and BB1
828 // .word (LBB0 - LJTI_0_0)
829 // .word (LBB1 - LJTI_0_0)
830 const MCExpr *Expr = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
832 if (TM.getRelocationModel() == Reloc::PIC_)
833 Expr = MCBinaryExpr::CreateSub(Expr, MCSymbolRefExpr::Create(JTISymbol,
836 OutStreamer.EmitValue(Expr, 4);
840 void ARMAsmPrinter::EmitJump2Table(const MachineInstr *MI) {
841 unsigned Opcode = MI->getOpcode();
842 int OpNum = (Opcode == ARM::t2BR_JT) ? 2 : 1;
843 const MachineOperand &MO1 = MI->getOperand(OpNum);
844 const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
845 unsigned JTI = MO1.getIndex();
847 // Emit a label for the jump table.
848 MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
849 OutStreamer.EmitLabel(JTISymbol);
851 // Emit each entry of the table.
852 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
853 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
854 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
855 unsigned OffsetWidth = 4;
856 if (MI->getOpcode() == ARM::t2TBB_JT)
858 else if (MI->getOpcode() == ARM::t2TBH_JT)
861 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
862 MachineBasicBlock *MBB = JTBBs[i];
863 const MCExpr *MBBSymbolExpr = MCSymbolRefExpr::Create(MBB->getSymbol(),
865 // If this isn't a TBB or TBH, the entries are direct branch instructions.
866 if (OffsetWidth == 4) {
868 BrInst.setOpcode(ARM::t2B);
869 BrInst.addOperand(MCOperand::CreateExpr(MBBSymbolExpr));
870 OutStreamer.EmitInstruction(BrInst);
873 // Otherwise it's an offset from the dispatch instruction. Construct an
874 // MCExpr for the entry. We want a value of the form:
875 // (BasicBlockAddr - TableBeginAddr) / 2
877 // For example, a TBB table with entries jumping to basic blocks BB0 and BB1
880 // .byte (LBB0 - LJTI_0_0) / 2
881 // .byte (LBB1 - LJTI_0_0) / 2
883 MCBinaryExpr::CreateSub(MBBSymbolExpr,
884 MCSymbolRefExpr::Create(JTISymbol, OutContext),
886 Expr = MCBinaryExpr::CreateDiv(Expr, MCConstantExpr::Create(2, OutContext),
888 OutStreamer.EmitValue(Expr, OffsetWidth);
892 void ARMAsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
894 unsigned NOps = MI->getNumOperands();
896 OS << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
897 // cast away const; DIetc do not take const operands for some reason.
898 DIVariable V(const_cast<MDNode *>(MI->getOperand(NOps-1).getMetadata()));
901 // Frame address. Currently handles register +- offset only.
902 assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm());
903 OS << '['; printOperand(MI, 0, OS); OS << '+'; printOperand(MI, 1, OS);
906 printOperand(MI, NOps-2, OS);
909 static void populateADROperands(MCInst &Inst, unsigned Dest,
910 const MCSymbol *Label,
911 unsigned pred, unsigned ccreg,
913 const MCExpr *SymbolExpr = MCSymbolRefExpr::Create(Label, Ctx);
914 Inst.addOperand(MCOperand::CreateReg(Dest));
915 Inst.addOperand(MCOperand::CreateExpr(SymbolExpr));
916 // Add predicate operands.
917 Inst.addOperand(MCOperand::CreateImm(pred));
918 Inst.addOperand(MCOperand::CreateReg(ccreg));
921 void ARMAsmPrinter::EmitPatchedInstruction(const MachineInstr *MI,
925 // Emit the instruction as usual, just patch the opcode.
926 LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
927 TmpInst.setOpcode(Opcode);
928 OutStreamer.EmitInstruction(TmpInst);
931 void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
932 assert(MI->getFlag(MachineInstr::FrameSetup) &&
933 "Only instruction which are involved into frame setup code are allowed");
935 const MachineFunction &MF = *MI->getParent()->getParent();
936 const TargetRegisterInfo *RegInfo = MF.getTarget().getRegisterInfo();
937 const ARMFunctionInfo &AFI = *MF.getInfo<ARMFunctionInfo>();
939 unsigned FramePtr = RegInfo->getFrameRegister(MF);
940 unsigned Opc = MI->getOpcode();
941 unsigned SrcReg, DstReg;
943 if (Opc == ARM::tPUSH || Opc == ARM::tLDRpci) {
944 // Two special cases:
945 // 1) tPUSH does not have src/dst regs.
946 // 2) for Thumb1 code we sometimes materialize the constant via constpool
947 // load. Yes, this is pretty fragile, but for now I don't see better
949 SrcReg = DstReg = ARM::SP;
951 SrcReg = MI->getOperand(1).getReg();
952 DstReg = MI->getOperand(0).getReg();
955 // Try to figure out the unwinding opcode out of src / dst regs.
956 if (MI->getDesc().mayStore()) {
958 assert(DstReg == ARM::SP &&
959 "Only stack pointer as a destination reg is supported");
961 SmallVector<unsigned, 4> RegList;
962 // Skip src & dst reg, and pred ops.
963 unsigned StartOp = 2 + 2;
964 // Use all the operands.
965 unsigned NumOffset = 0;
970 assert(0 && "Unsupported opcode for unwinding information");
972 // Special case here: no src & dst reg, but two extra imp ops.
973 StartOp = 2; NumOffset = 2;
975 case ARM::t2STMDB_UPD:
976 case ARM::VSTMDDB_UPD:
977 assert(SrcReg == ARM::SP &&
978 "Only stack pointer as a source reg is supported");
979 for (unsigned i = StartOp, NumOps = MI->getNumOperands() - NumOffset;
981 RegList.push_back(MI->getOperand(i).getReg());
984 assert(MI->getOperand(2).getReg() == ARM::SP &&
985 "Only stack pointer as a source reg is supported");
986 RegList.push_back(SrcReg);
989 OutStreamer.EmitRegSave(RegList, Opc == ARM::VSTMDDB_UPD);
991 // Changes of stack / frame pointer.
992 if (SrcReg == ARM::SP) {
997 assert(0 && "Unsupported opcode for unwinding information");
999 case ARM::tMOVgpr2gpr:
1000 case ARM::tMOVgpr2tgpr:
1004 Offset = -MI->getOperand(2).getImm();
1007 case ARM::t2SUBrSPi:
1008 Offset = MI->getOperand(2).getImm();
1011 Offset = MI->getOperand(2).getImm()*4;
1015 Offset = -MI->getOperand(2).getImm()*4;
1017 case ARM::tLDRpci: {
1018 // Grab the constpool index and check, whether it corresponds to
1019 // original or cloned constpool entry.
1020 unsigned CPI = MI->getOperand(1).getIndex();
1021 const MachineConstantPool *MCP = MF.getConstantPool();
1022 if (CPI >= MCP->getConstants().size())
1023 CPI = AFI.getOriginalCPIdx(CPI);
1024 assert(CPI != -1U && "Invalid constpool index");
1026 // Derive the actual offset.
1027 const MachineConstantPoolEntry &CPE = MCP->getConstants()[CPI];
1028 assert(!CPE.isMachineConstantPoolEntry() && "Invalid constpool entry");
1029 // FIXME: Check for user, it should be "add" instruction!
1030 Offset = -cast<ConstantInt>(CPE.Val.ConstVal)->getSExtValue();
1035 if (DstReg == FramePtr && FramePtr != ARM::SP)
1036 // Set-up of the frame pointer. Positive values correspond to "add"
1038 OutStreamer.EmitSetFP(FramePtr, ARM::SP, -Offset);
1039 else if (DstReg == ARM::SP) {
1040 // Change of SP by an offset. Positive values correspond to "sub"
1042 OutStreamer.EmitPad(Offset);
1045 assert(0 && "Unsupported opcode for unwinding information");
1047 } else if (DstReg == ARM::SP) {
1048 // FIXME: .movsp goes here
1050 assert(0 && "Unsupported opcode for unwinding information");
1054 assert(0 && "Unsupported opcode for unwinding information");
1059 extern cl::opt<bool> EnableARMEHABI;
1061 void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
1062 unsigned Opc = MI->getOpcode();
1066 // B is just a Bcc with an 'always' predicate.
1068 LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
1069 TmpInst.setOpcode(ARM::Bcc);
1070 // Add predicate operands.
1071 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1072 TmpInst.addOperand(MCOperand::CreateReg(0));
1073 OutStreamer.EmitInstruction(TmpInst);
1076 case ARM::LDMIA_RET: {
1077 // LDMIA_RET is just a normal LDMIA_UPD instruction that targets PC and as
1078 // such has additional code-gen properties and scheduling information.
1079 // To emit it, we just construct as normal and set the opcode to LDMIA_UPD.
1081 LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
1082 TmpInst.setOpcode(ARM::LDMIA_UPD);
1083 OutStreamer.EmitInstruction(TmpInst);
1086 case ARM::t2ADDrSPi:
1087 case ARM::t2ADDrSPi12:
1088 case ARM::t2SUBrSPi:
1089 case ARM::t2SUBrSPi12:
1090 assert ((MI->getOperand(1).getReg() == ARM::SP) &&
1091 "Unexpected source register!");
1094 case ARM::t2MOVi32imm: assert(0 && "Should be lowered by thumb2it pass");
1095 case ARM::DBG_VALUE: {
1096 if (isVerbose() && OutStreamer.hasRawTextSupport()) {
1097 SmallString<128> TmpStr;
1098 raw_svector_ostream OS(TmpStr);
1099 PrintDebugValueComment(MI, OS);
1100 OutStreamer.EmitRawText(StringRef(OS.str()));
1106 TmpInst.setOpcode(ARM::tBL);
1107 TmpInst.addOperand(MCOperand::CreateExpr(MCSymbolRefExpr::Create(
1108 MI->getOperand(0).getMBB()->getSymbol(), OutContext)));
1109 OutStreamer.EmitInstruction(TmpInst);
1113 case ARM::tLEApcrel:
1114 case ARM::t2LEApcrel: {
1115 // FIXME: Need to also handle globals and externals
1117 TmpInst.setOpcode(MI->getOpcode() == ARM::t2LEApcrel ? ARM::t2ADR
1118 : (MI->getOpcode() == ARM::tLEApcrel ? ARM::tADR
1120 populateADROperands(TmpInst, MI->getOperand(0).getReg(),
1121 GetCPISymbol(MI->getOperand(1).getIndex()),
1122 MI->getOperand(2).getImm(), MI->getOperand(3).getReg(),
1124 OutStreamer.EmitInstruction(TmpInst);
1127 case ARM::LEApcrelJT:
1128 case ARM::tLEApcrelJT:
1129 case ARM::t2LEApcrelJT: {
1131 TmpInst.setOpcode(MI->getOpcode() == ARM::t2LEApcrelJT ? ARM::t2ADR
1132 : (MI->getOpcode() == ARM::tLEApcrelJT ? ARM::tADR
1134 populateADROperands(TmpInst, MI->getOperand(0).getReg(),
1135 GetARMJTIPICJumpTableLabel2(MI->getOperand(1).getIndex(),
1136 MI->getOperand(2).getImm()),
1137 MI->getOperand(3).getImm(), MI->getOperand(4).getReg(),
1139 OutStreamer.EmitInstruction(TmpInst);
1142 case ARM::MOVPCRX: {
1144 TmpInst.setOpcode(ARM::MOVr);
1145 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1146 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1147 // Add predicate operands.
1148 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1149 TmpInst.addOperand(MCOperand::CreateReg(0));
1150 // Add 's' bit operand (always reg0 for this)
1151 TmpInst.addOperand(MCOperand::CreateReg(0));
1152 OutStreamer.EmitInstruction(TmpInst);
1155 // Darwin call instructions are just normal call instructions with different
1156 // clobber semantics (they clobber R9).
1158 case ARM::BLr9_pred:
1160 case ARM::BLXr9_pred: {
1164 case ARM::BLr9: newOpc = ARM::BL; break;
1165 case ARM::BLr9_pred: newOpc = ARM::BL_pred; break;
1166 case ARM::BLXr9: newOpc = ARM::BLX; break;
1167 case ARM::BLXr9_pred: newOpc = ARM::BLX_pred; break;
1170 LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
1171 TmpInst.setOpcode(newOpc);
1172 OutStreamer.EmitInstruction(TmpInst);
1175 case ARM::BXr9_CALL:
1176 case ARM::BX_CALL: {
1179 TmpInst.setOpcode(ARM::MOVr);
1180 TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
1181 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1182 // Add predicate operands.
1183 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1184 TmpInst.addOperand(MCOperand::CreateReg(0));
1185 // Add 's' bit operand (always reg0 for this)
1186 TmpInst.addOperand(MCOperand::CreateReg(0));
1187 OutStreamer.EmitInstruction(TmpInst);
1191 TmpInst.setOpcode(ARM::BX);
1192 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1193 OutStreamer.EmitInstruction(TmpInst);
1197 case ARM::BMOVPCRXr9_CALL:
1198 case ARM::BMOVPCRX_CALL: {
1201 TmpInst.setOpcode(ARM::MOVr);
1202 TmpInst.addOperand(MCOperand::CreateReg(ARM::LR));
1203 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1204 // Add predicate operands.
1205 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1206 TmpInst.addOperand(MCOperand::CreateReg(0));
1207 // Add 's' bit operand (always reg0 for this)
1208 TmpInst.addOperand(MCOperand::CreateReg(0));
1209 OutStreamer.EmitInstruction(TmpInst);
1213 TmpInst.setOpcode(ARM::MOVr);
1214 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1215 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1216 // Add predicate operands.
1217 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1218 TmpInst.addOperand(MCOperand::CreateReg(0));
1219 // Add 's' bit operand (always reg0 for this)
1220 TmpInst.addOperand(MCOperand::CreateReg(0));
1221 OutStreamer.EmitInstruction(TmpInst);
1225 case ARM::MOVi16_ga_pcrel:
1226 case ARM::t2MOVi16_ga_pcrel: {
1228 TmpInst.setOpcode(Opc == ARM::MOVi16_ga_pcrel? ARM::MOVi16 : ARM::t2MOVi16);
1229 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1231 unsigned TF = MI->getOperand(1).getTargetFlags();
1232 bool isPIC = TF == ARMII::MO_LO16_NONLAZY_PIC;
1233 const GlobalValue *GV = MI->getOperand(1).getGlobal();
1234 MCSymbol *GVSym = GetARMGVSymbol(GV);
1235 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1237 MCSymbol *LabelSym = getPICLabel(MAI->getPrivateGlobalPrefix(),
1238 getFunctionNumber(),
1239 MI->getOperand(2).getImm(), OutContext);
1240 const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
1241 unsigned PCAdj = (Opc == ARM::MOVi16_ga_pcrel) ? 8 : 4;
1242 const MCExpr *PCRelExpr =
1243 ARMMCExpr::CreateLower16(MCBinaryExpr::CreateSub(GVSymExpr,
1244 MCBinaryExpr::CreateAdd(LabelSymExpr,
1245 MCConstantExpr::Create(PCAdj, OutContext),
1246 OutContext), OutContext), OutContext);
1247 TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
1249 const MCExpr *RefExpr= ARMMCExpr::CreateLower16(GVSymExpr, OutContext);
1250 TmpInst.addOperand(MCOperand::CreateExpr(RefExpr));
1253 // Add predicate operands.
1254 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1255 TmpInst.addOperand(MCOperand::CreateReg(0));
1256 // Add 's' bit operand (always reg0 for this)
1257 TmpInst.addOperand(MCOperand::CreateReg(0));
1258 OutStreamer.EmitInstruction(TmpInst);
1261 case ARM::MOVTi16_ga_pcrel:
1262 case ARM::t2MOVTi16_ga_pcrel: {
1264 TmpInst.setOpcode(Opc == ARM::MOVTi16_ga_pcrel
1265 ? ARM::MOVTi16 : ARM::t2MOVTi16);
1266 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1267 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1269 unsigned TF = MI->getOperand(2).getTargetFlags();
1270 bool isPIC = TF == ARMII::MO_HI16_NONLAZY_PIC;
1271 const GlobalValue *GV = MI->getOperand(2).getGlobal();
1272 MCSymbol *GVSym = GetARMGVSymbol(GV);
1273 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1275 MCSymbol *LabelSym = getPICLabel(MAI->getPrivateGlobalPrefix(),
1276 getFunctionNumber(),
1277 MI->getOperand(3).getImm(), OutContext);
1278 const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
1279 unsigned PCAdj = (Opc == ARM::MOVTi16_ga_pcrel) ? 8 : 4;
1280 const MCExpr *PCRelExpr =
1281 ARMMCExpr::CreateUpper16(MCBinaryExpr::CreateSub(GVSymExpr,
1282 MCBinaryExpr::CreateAdd(LabelSymExpr,
1283 MCConstantExpr::Create(PCAdj, OutContext),
1284 OutContext), OutContext), OutContext);
1285 TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
1287 const MCExpr *RefExpr= ARMMCExpr::CreateUpper16(GVSymExpr, OutContext);
1288 TmpInst.addOperand(MCOperand::CreateExpr(RefExpr));
1290 // Add predicate operands.
1291 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1292 TmpInst.addOperand(MCOperand::CreateReg(0));
1293 // Add 's' bit operand (always reg0 for this)
1294 TmpInst.addOperand(MCOperand::CreateReg(0));
1295 OutStreamer.EmitInstruction(TmpInst);
1298 case ARM::tPICADD: {
1299 // This is a pseudo op for a label + instruction sequence, which looks like:
1302 // This adds the address of LPC0 to r0.
1305 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1306 getFunctionNumber(), MI->getOperand(2).getImm(),
1309 // Form and emit the add.
1311 AddInst.setOpcode(ARM::tADDhirr);
1312 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1313 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1314 AddInst.addOperand(MCOperand::CreateReg(ARM::PC));
1315 // Add predicate operands.
1316 AddInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1317 AddInst.addOperand(MCOperand::CreateReg(0));
1318 OutStreamer.EmitInstruction(AddInst);
1322 // This is a pseudo op for a label + instruction sequence, which looks like:
1325 // This adds the address of LPC0 to r0.
1328 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1329 getFunctionNumber(), MI->getOperand(2).getImm(),
1332 // Form and emit the add.
1334 AddInst.setOpcode(ARM::ADDrr);
1335 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1336 AddInst.addOperand(MCOperand::CreateReg(ARM::PC));
1337 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1338 // Add predicate operands.
1339 AddInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
1340 AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(4).getReg()));
1341 // Add 's' bit operand (always reg0 for this)
1342 AddInst.addOperand(MCOperand::CreateReg(0));
1343 OutStreamer.EmitInstruction(AddInst);
1353 case ARM::PICLDRSH: {
1354 // This is a pseudo op for a label + instruction sequence, which looks like:
1357 // The LCP0 label is referenced by a constant pool entry in order to get
1358 // a PC-relative address at the ldr instruction.
1361 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1362 getFunctionNumber(), MI->getOperand(2).getImm(),
1365 // Form and emit the load
1367 switch (MI->getOpcode()) {
1369 llvm_unreachable("Unexpected opcode!");
1370 case ARM::PICSTR: Opcode = ARM::STRrs; break;
1371 case ARM::PICSTRB: Opcode = ARM::STRBrs; break;
1372 case ARM::PICSTRH: Opcode = ARM::STRH; break;
1373 case ARM::PICLDR: Opcode = ARM::LDRrs; break;
1374 case ARM::PICLDRB: Opcode = ARM::LDRBrs; break;
1375 case ARM::PICLDRH: Opcode = ARM::LDRH; break;
1376 case ARM::PICLDRSB: Opcode = ARM::LDRSB; break;
1377 case ARM::PICLDRSH: Opcode = ARM::LDRSH; break;
1380 LdStInst.setOpcode(Opcode);
1381 LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1382 LdStInst.addOperand(MCOperand::CreateReg(ARM::PC));
1383 LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1384 LdStInst.addOperand(MCOperand::CreateImm(0));
1385 // Add predicate operands.
1386 LdStInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
1387 LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(4).getReg()));
1388 OutStreamer.EmitInstruction(LdStInst);
1392 case ARM::CONSTPOOL_ENTRY: {
1393 /// CONSTPOOL_ENTRY - This instruction represents a floating constant pool
1394 /// in the function. The first operand is the ID# for this instruction, the
1395 /// second is the index into the MachineConstantPool that this is, the third
1396 /// is the size in bytes of this constant pool entry.
1397 unsigned LabelId = (unsigned)MI->getOperand(0).getImm();
1398 unsigned CPIdx = (unsigned)MI->getOperand(1).getIndex();
1401 OutStreamer.EmitLabel(GetCPISymbol(LabelId));
1403 const MachineConstantPoolEntry &MCPE = MCP->getConstants()[CPIdx];
1404 if (MCPE.isMachineConstantPoolEntry())
1405 EmitMachineConstantPoolValue(MCPE.Val.MachineCPVal);
1407 EmitGlobalConstant(MCPE.Val.ConstVal);
1411 case ARM::t2BR_JT: {
1412 // Lower and emit the instruction itself, then the jump table following it.
1414 TmpInst.setOpcode(ARM::tMOVgpr2gpr);
1415 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1416 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1417 // Add predicate operands.
1418 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1419 TmpInst.addOperand(MCOperand::CreateReg(0));
1420 OutStreamer.EmitInstruction(TmpInst);
1421 // Output the data for the jump table itself
1425 case ARM::t2TBB_JT: {
1426 // Lower and emit the instruction itself, then the jump table following it.
1429 TmpInst.setOpcode(ARM::t2TBB);
1430 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1431 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1432 // Add predicate operands.
1433 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1434 TmpInst.addOperand(MCOperand::CreateReg(0));
1435 OutStreamer.EmitInstruction(TmpInst);
1436 // Output the data for the jump table itself
1438 // Make sure the next instruction is 2-byte aligned.
1442 case ARM::t2TBH_JT: {
1443 // Lower and emit the instruction itself, then the jump table following it.
1446 TmpInst.setOpcode(ARM::t2TBH);
1447 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1448 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1449 // Add predicate operands.
1450 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1451 TmpInst.addOperand(MCOperand::CreateReg(0));
1452 OutStreamer.EmitInstruction(TmpInst);
1453 // Output the data for the jump table itself
1459 // Lower and emit the instruction itself, then the jump table following it.
1462 unsigned Opc = MI->getOpcode() == ARM::BR_JTr ?
1463 ARM::MOVr : ARM::tMOVgpr2gpr;
1464 TmpInst.setOpcode(Opc);
1465 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1466 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1467 // Add predicate operands.
1468 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1469 TmpInst.addOperand(MCOperand::CreateReg(0));
1470 // Add 's' bit operand (always reg0 for this)
1471 if (Opc == ARM::MOVr)
1472 TmpInst.addOperand(MCOperand::CreateReg(0));
1473 OutStreamer.EmitInstruction(TmpInst);
1475 // Make sure the Thumb jump table is 4-byte aligned.
1476 if (Opc == ARM::tMOVgpr2gpr)
1479 // Output the data for the jump table itself
1484 // Lower and emit the instruction itself, then the jump table following it.
1487 if (MI->getOperand(1).getReg() == 0) {
1489 TmpInst.setOpcode(ARM::LDRi12);
1490 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1491 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1492 TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(2).getImm()));
1494 TmpInst.setOpcode(ARM::LDRrs);
1495 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1496 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1497 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1498 TmpInst.addOperand(MCOperand::CreateImm(0));
1500 // Add predicate operands.
1501 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1502 TmpInst.addOperand(MCOperand::CreateReg(0));
1503 OutStreamer.EmitInstruction(TmpInst);
1505 // Output the data for the jump table itself
1509 case ARM::BR_JTadd: {
1510 // Lower and emit the instruction itself, then the jump table following it.
1511 // add pc, target, idx
1513 TmpInst.setOpcode(ARM::ADDrr);
1514 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1515 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1516 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1517 // Add predicate operands.
1518 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1519 TmpInst.addOperand(MCOperand::CreateReg(0));
1520 // Add 's' bit operand (always reg0 for this)
1521 TmpInst.addOperand(MCOperand::CreateReg(0));
1522 OutStreamer.EmitInstruction(TmpInst);
1524 // Output the data for the jump table itself
1529 // Non-Darwin binutils don't yet support the "trap" mnemonic.
1530 // FIXME: Remove this special case when they do.
1531 if (!Subtarget->isTargetDarwin()) {
1532 //.long 0xe7ffdefe @ trap
1533 uint32_t Val = 0xe7ffdefeUL;
1534 OutStreamer.AddComment("trap");
1535 OutStreamer.EmitIntValue(Val, 4);
1541 // Non-Darwin binutils don't yet support the "trap" mnemonic.
1542 // FIXME: Remove this special case when they do.
1543 if (!Subtarget->isTargetDarwin()) {
1544 //.short 57086 @ trap
1545 uint16_t Val = 0xdefe;
1546 OutStreamer.AddComment("trap");
1547 OutStreamer.EmitIntValue(Val, 2);
1552 case ARM::t2Int_eh_sjlj_setjmp:
1553 case ARM::t2Int_eh_sjlj_setjmp_nofp:
1554 case ARM::tInt_eh_sjlj_setjmp: {
1555 // Two incoming args: GPR:$src, GPR:$val
1558 // str $val, [$src, #4]
1563 unsigned SrcReg = MI->getOperand(0).getReg();
1564 unsigned ValReg = MI->getOperand(1).getReg();
1565 MCSymbol *Label = GetARMSJLJEHLabel();
1568 TmpInst.setOpcode(ARM::tMOVgpr2tgpr);
1569 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1570 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1572 TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1573 OutStreamer.AddComment("eh_setjmp begin");
1574 OutStreamer.EmitInstruction(TmpInst);
1578 TmpInst.setOpcode(ARM::tADDi3);
1579 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1581 TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1582 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1583 TmpInst.addOperand(MCOperand::CreateImm(7));
1585 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1586 TmpInst.addOperand(MCOperand::CreateReg(0));
1587 OutStreamer.EmitInstruction(TmpInst);
1591 TmpInst.setOpcode(ARM::tSTRi);
1592 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1593 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1594 // The offset immediate is #4. The operand value is scaled by 4 for the
1595 // tSTR instruction.
1596 TmpInst.addOperand(MCOperand::CreateImm(1));
1598 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1599 TmpInst.addOperand(MCOperand::CreateReg(0));
1600 OutStreamer.EmitInstruction(TmpInst);
1604 TmpInst.setOpcode(ARM::tMOVi8);
1605 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1606 TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1607 TmpInst.addOperand(MCOperand::CreateImm(0));
1609 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1610 TmpInst.addOperand(MCOperand::CreateReg(0));
1611 OutStreamer.EmitInstruction(TmpInst);
1614 const MCExpr *SymbolExpr = MCSymbolRefExpr::Create(Label, OutContext);
1616 TmpInst.setOpcode(ARM::tB);
1617 TmpInst.addOperand(MCOperand::CreateExpr(SymbolExpr));
1618 OutStreamer.EmitInstruction(TmpInst);
1622 TmpInst.setOpcode(ARM::tMOVi8);
1623 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1624 TmpInst.addOperand(MCOperand::CreateReg(ARM::CPSR));
1625 TmpInst.addOperand(MCOperand::CreateImm(1));
1627 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1628 TmpInst.addOperand(MCOperand::CreateReg(0));
1629 OutStreamer.AddComment("eh_setjmp end");
1630 OutStreamer.EmitInstruction(TmpInst);
1632 OutStreamer.EmitLabel(Label);
1636 case ARM::Int_eh_sjlj_setjmp_nofp:
1637 case ARM::Int_eh_sjlj_setjmp: {
1638 // Two incoming args: GPR:$src, GPR:$val
1640 // str $val, [$src, #+4]
1644 unsigned SrcReg = MI->getOperand(0).getReg();
1645 unsigned ValReg = MI->getOperand(1).getReg();
1649 TmpInst.setOpcode(ARM::ADDri);
1650 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1651 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1652 TmpInst.addOperand(MCOperand::CreateImm(8));
1654 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1655 TmpInst.addOperand(MCOperand::CreateReg(0));
1656 // 's' bit operand (always reg0 for this).
1657 TmpInst.addOperand(MCOperand::CreateReg(0));
1658 OutStreamer.AddComment("eh_setjmp begin");
1659 OutStreamer.EmitInstruction(TmpInst);
1663 TmpInst.setOpcode(ARM::STRi12);
1664 TmpInst.addOperand(MCOperand::CreateReg(ValReg));
1665 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1666 TmpInst.addOperand(MCOperand::CreateImm(4));
1668 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1669 TmpInst.addOperand(MCOperand::CreateReg(0));
1670 OutStreamer.EmitInstruction(TmpInst);
1674 TmpInst.setOpcode(ARM::MOVi);
1675 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1676 TmpInst.addOperand(MCOperand::CreateImm(0));
1678 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1679 TmpInst.addOperand(MCOperand::CreateReg(0));
1680 // 's' bit operand (always reg0 for this).
1681 TmpInst.addOperand(MCOperand::CreateReg(0));
1682 OutStreamer.EmitInstruction(TmpInst);
1686 TmpInst.setOpcode(ARM::ADDri);
1687 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1688 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1689 TmpInst.addOperand(MCOperand::CreateImm(0));
1691 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1692 TmpInst.addOperand(MCOperand::CreateReg(0));
1693 // 's' bit operand (always reg0 for this).
1694 TmpInst.addOperand(MCOperand::CreateReg(0));
1695 OutStreamer.EmitInstruction(TmpInst);
1699 TmpInst.setOpcode(ARM::MOVi);
1700 TmpInst.addOperand(MCOperand::CreateReg(ARM::R0));
1701 TmpInst.addOperand(MCOperand::CreateImm(1));
1703 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1704 TmpInst.addOperand(MCOperand::CreateReg(0));
1705 // 's' bit operand (always reg0 for this).
1706 TmpInst.addOperand(MCOperand::CreateReg(0));
1707 OutStreamer.AddComment("eh_setjmp end");
1708 OutStreamer.EmitInstruction(TmpInst);
1712 case ARM::Int_eh_sjlj_longjmp: {
1713 // ldr sp, [$src, #8]
1714 // ldr $scratch, [$src, #4]
1717 unsigned SrcReg = MI->getOperand(0).getReg();
1718 unsigned ScratchReg = MI->getOperand(1).getReg();
1721 TmpInst.setOpcode(ARM::LDRi12);
1722 TmpInst.addOperand(MCOperand::CreateReg(ARM::SP));
1723 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1724 TmpInst.addOperand(MCOperand::CreateImm(8));
1726 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1727 TmpInst.addOperand(MCOperand::CreateReg(0));
1728 OutStreamer.EmitInstruction(TmpInst);
1732 TmpInst.setOpcode(ARM::LDRi12);
1733 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1734 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1735 TmpInst.addOperand(MCOperand::CreateImm(4));
1737 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1738 TmpInst.addOperand(MCOperand::CreateReg(0));
1739 OutStreamer.EmitInstruction(TmpInst);
1743 TmpInst.setOpcode(ARM::LDRi12);
1744 TmpInst.addOperand(MCOperand::CreateReg(ARM::R7));
1745 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1746 TmpInst.addOperand(MCOperand::CreateImm(0));
1748 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1749 TmpInst.addOperand(MCOperand::CreateReg(0));
1750 OutStreamer.EmitInstruction(TmpInst);
1754 TmpInst.setOpcode(ARM::BX);
1755 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1757 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1758 TmpInst.addOperand(MCOperand::CreateReg(0));
1759 OutStreamer.EmitInstruction(TmpInst);
1763 case ARM::tInt_eh_sjlj_longjmp: {
1764 // ldr $scratch, [$src, #8]
1766 // ldr $scratch, [$src, #4]
1769 unsigned SrcReg = MI->getOperand(0).getReg();
1770 unsigned ScratchReg = MI->getOperand(1).getReg();
1773 TmpInst.setOpcode(ARM::tLDRi);
1774 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1775 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1776 // The offset immediate is #8. The operand value is scaled by 4 for the
1777 // tLDR instruction.
1778 TmpInst.addOperand(MCOperand::CreateImm(2));
1780 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1781 TmpInst.addOperand(MCOperand::CreateReg(0));
1782 OutStreamer.EmitInstruction(TmpInst);
1786 TmpInst.setOpcode(ARM::tMOVtgpr2gpr);
1787 TmpInst.addOperand(MCOperand::CreateReg(ARM::SP));
1788 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1790 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1791 TmpInst.addOperand(MCOperand::CreateReg(0));
1792 OutStreamer.EmitInstruction(TmpInst);
1796 TmpInst.setOpcode(ARM::tLDRi);
1797 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1798 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1799 TmpInst.addOperand(MCOperand::CreateImm(1));
1801 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1802 TmpInst.addOperand(MCOperand::CreateReg(0));
1803 OutStreamer.EmitInstruction(TmpInst);
1807 TmpInst.setOpcode(ARM::tLDRr);
1808 TmpInst.addOperand(MCOperand::CreateReg(ARM::R7));
1809 TmpInst.addOperand(MCOperand::CreateReg(SrcReg));
1810 TmpInst.addOperand(MCOperand::CreateReg(0));
1812 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1813 TmpInst.addOperand(MCOperand::CreateReg(0));
1814 OutStreamer.EmitInstruction(TmpInst);
1818 TmpInst.setOpcode(ARM::tBX_RET_vararg);
1819 TmpInst.addOperand(MCOperand::CreateReg(ScratchReg));
1821 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1822 TmpInst.addOperand(MCOperand::CreateReg(0));
1823 OutStreamer.EmitInstruction(TmpInst);
1827 // Tail jump branches are really just branch instructions with additional
1828 // code-gen attributes. Convert them to the canonical form here.
1830 case ARM::TAILJMPdND: {
1831 MCInst TmpInst, TmpInst2;
1832 // Lower the instruction as-is to get the operands properly converted.
1833 LowerARMMachineInstrToMCInst(MI, TmpInst2, *this);
1834 TmpInst.setOpcode(ARM::Bcc);
1835 TmpInst.addOperand(TmpInst2.getOperand(0));
1836 // Add predicate operands.
1837 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1838 TmpInst.addOperand(MCOperand::CreateReg(0));
1839 OutStreamer.AddComment("TAILCALL");
1840 OutStreamer.EmitInstruction(TmpInst);
1843 case ARM::tTAILJMPd:
1844 case ARM::tTAILJMPdND: {
1845 MCInst TmpInst, TmpInst2;
1846 LowerARMMachineInstrToMCInst(MI, TmpInst2, *this);
1847 // The Darwin toolchain doesn't support tail call relocations of 16-bit
1849 TmpInst.setOpcode(Opc == ARM::tTAILJMPd ? ARM::t2B : ARM::tB);
1850 TmpInst.addOperand(TmpInst2.getOperand(0));
1851 OutStreamer.AddComment("TAILCALL");
1852 OutStreamer.EmitInstruction(TmpInst);
1855 case ARM::TAILJMPrND:
1856 case ARM::tTAILJMPrND:
1858 case ARM::tTAILJMPr: {
1859 unsigned newOpc = (Opc == ARM::TAILJMPr || Opc == ARM::TAILJMPrND)
1860 ? ARM::BX : ARM::tBX;
1862 TmpInst.setOpcode(newOpc);
1863 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1865 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1866 TmpInst.addOperand(MCOperand::CreateReg(0));
1867 OutStreamer.AddComment("TAILCALL");
1868 OutStreamer.EmitInstruction(TmpInst);
1872 // These are the pseudos created to comply with stricter operand restrictions
1873 // on ARMv5. Lower them now to "normal" instructions, since all the
1874 // restrictions are already satisfied.
1876 EmitPatchedInstruction(MI, ARM::MUL);
1879 EmitPatchedInstruction(MI, ARM::MLA);
1882 EmitPatchedInstruction(MI, ARM::SMULL);
1885 EmitPatchedInstruction(MI, ARM::UMULL);
1888 EmitPatchedInstruction(MI, ARM::SMLAL);
1891 EmitPatchedInstruction(MI, ARM::UMLAL);
1894 EmitPatchedInstruction(MI, ARM::UMAAL);
1899 LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
1901 // Emit unwinding stuff for frame-related instructions
1902 if (EnableARMEHABI && MI->getFlag(MachineInstr::FrameSetup))
1903 EmitUnwindingInstruction(MI);
1905 OutStreamer.EmitInstruction(TmpInst);
1908 //===----------------------------------------------------------------------===//
1909 // Target Registry Stuff
1910 //===----------------------------------------------------------------------===//
1912 static MCInstPrinter *createARMMCInstPrinter(const Target &T,
1914 unsigned SyntaxVariant,
1915 const MCAsmInfo &MAI) {
1916 if (SyntaxVariant == 0)
1917 return new ARMInstPrinter(TM, MAI);
1921 // Force static initialization.
1922 extern "C" void LLVMInitializeARMAsmPrinter() {
1923 RegisterAsmPrinter<ARMAsmPrinter> X(TheARMTarget);
1924 RegisterAsmPrinter<ARMAsmPrinter> Y(TheThumbTarget);
1926 TargetRegistry::RegisterMCInstPrinter(TheARMTarget, createARMMCInstPrinter);
1927 TargetRegistry::RegisterMCInstPrinter(TheThumbTarget, createARMMCInstPrinter);