1 //===- AArch64AsmPrinter.cpp - AArch64 LLVM assembly writer ---------------===//
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 the AArch64 assembly language.
13 //===----------------------------------------------------------------------===//
16 #include "AArch64MCInstLower.h"
17 #include "AArch64MachineFunctionInfo.h"
18 #include "AArch64RegisterInfo.h"
19 #include "AArch64Subtarget.h"
20 #include "AArch64TargetObjectFile.h"
21 #include "InstPrinter/AArch64InstPrinter.h"
22 #include "MCTargetDesc/AArch64AddressingModes.h"
23 #include "MCTargetDesc/AArch64MCTargetDesc.h"
24 #include "Utils/AArch64BaseInfo.h"
25 #include "llvm/ADT/SmallString.h"
26 #include "llvm/ADT/SmallVector.h"
27 #include "llvm/ADT/StringRef.h"
28 #include "llvm/ADT/Triple.h"
29 #include "llvm/ADT/Twine.h"
30 #include "llvm/CodeGen/AsmPrinter.h"
31 #include "llvm/CodeGen/MachineBasicBlock.h"
32 #include "llvm/CodeGen/MachineFunction.h"
33 #include "llvm/CodeGen/MachineInstr.h"
34 #include "llvm/CodeGen/MachineOperand.h"
35 #include "llvm/CodeGen/StackMaps.h"
36 #include "llvm/CodeGen/TargetRegisterInfo.h"
37 #include "llvm/IR/DataLayout.h"
38 #include "llvm/IR/DebugInfoMetadata.h"
39 #include "llvm/MC/MCAsmInfo.h"
40 #include "llvm/MC/MCContext.h"
41 #include "llvm/MC/MCInst.h"
42 #include "llvm/MC/MCInstBuilder.h"
43 #include "llvm/MC/MCStreamer.h"
44 #include "llvm/MC/MCSymbol.h"
45 #include "llvm/Support/Casting.h"
46 #include "llvm/Support/ErrorHandling.h"
47 #include "llvm/Support/TargetRegistry.h"
48 #include "llvm/Support/raw_ostream.h"
49 #include "llvm/Target/TargetMachine.h"
58 #define DEBUG_TYPE "asm-printer"
62 class AArch64AsmPrinter : public AsmPrinter {
63 AArch64MCInstLower MCInstLowering;
65 const AArch64Subtarget *STI;
68 AArch64AsmPrinter(TargetMachine &TM, std::unique_ptr<MCStreamer> Streamer)
69 : AsmPrinter(TM, std::move(Streamer)), MCInstLowering(OutContext, *this),
72 StringRef getPassName() const override { return "AArch64 Assembly Printer"; }
74 /// Wrapper for MCInstLowering.lowerOperand() for the
75 /// tblgen'erated pseudo lowering.
76 bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp) const {
77 return MCInstLowering.lowerOperand(MO, MCOp);
80 void LowerSTACKMAP(MCStreamer &OutStreamer, StackMaps &SM,
81 const MachineInstr &MI);
82 void LowerPATCHPOINT(MCStreamer &OutStreamer, StackMaps &SM,
83 const MachineInstr &MI);
85 void LowerPATCHABLE_FUNCTION_ENTER(const MachineInstr &MI);
86 void LowerPATCHABLE_FUNCTION_EXIT(const MachineInstr &MI);
87 void LowerPATCHABLE_TAIL_CALL(const MachineInstr &MI);
89 void EmitSled(const MachineInstr &MI, SledKind Kind);
91 /// tblgen'erated driver function for lowering simple MI->MC
92 /// pseudo instructions.
93 bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
94 const MachineInstr *MI);
96 void EmitInstruction(const MachineInstr *MI) override;
98 void getAnalysisUsage(AnalysisUsage &AU) const override {
99 AsmPrinter::getAnalysisUsage(AU);
100 AU.setPreservesAll();
103 bool runOnMachineFunction(MachineFunction &F) override {
104 AArch64FI = F.getInfo<AArch64FunctionInfo>();
105 STI = static_cast<const AArch64Subtarget*>(&F.getSubtarget());
106 bool Result = AsmPrinter::runOnMachineFunction(F);
112 void printOperand(const MachineInstr *MI, unsigned OpNum, raw_ostream &O);
113 bool printAsmMRegister(const MachineOperand &MO, char Mode, raw_ostream &O);
114 bool printAsmRegInClass(const MachineOperand &MO,
115 const TargetRegisterClass *RC, bool isVector,
118 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
119 unsigned AsmVariant, const char *ExtraCode,
120 raw_ostream &O) override;
121 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
122 unsigned AsmVariant, const char *ExtraCode,
123 raw_ostream &O) override;
125 void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
127 void EmitFunctionBodyEnd() override;
129 MCSymbol *GetCPISymbol(unsigned CPID) const override;
130 void EmitEndOfAsmFile(Module &M) override;
132 AArch64FunctionInfo *AArch64FI = nullptr;
134 /// Emit the LOHs contained in AArch64FI.
137 /// Emit instruction to set float register to zero.
138 void EmitFMov0(const MachineInstr &MI);
140 using MInstToMCSymbol = std::map<const MachineInstr *, MCSymbol *>;
142 MInstToMCSymbol LOHInstToLabel;
145 } // end anonymous namespace
147 void AArch64AsmPrinter::LowerPATCHABLE_FUNCTION_ENTER(const MachineInstr &MI)
149 EmitSled(MI, SledKind::FUNCTION_ENTER);
152 void AArch64AsmPrinter::LowerPATCHABLE_FUNCTION_EXIT(const MachineInstr &MI)
154 EmitSled(MI, SledKind::FUNCTION_EXIT);
157 void AArch64AsmPrinter::LowerPATCHABLE_TAIL_CALL(const MachineInstr &MI)
159 EmitSled(MI, SledKind::TAIL_CALL);
162 void AArch64AsmPrinter::EmitSled(const MachineInstr &MI, SledKind Kind)
164 static const int8_t NoopsInSledCount = 7;
165 // We want to emit the following pattern:
170 // ; 7 NOP instructions (28 bytes)
173 // We need the 28 bytes (7 instructions) because at runtime, we'd be patching
174 // over the full 32 bytes (8 instructions) with the following pattern:
176 // STP X0, X30, [SP, #-16]! ; push X0 and the link register to the stack
177 // LDR W0, #12 ; W0 := function ID
178 // LDR X16,#12 ; X16 := addr of __xray_FunctionEntry or __xray_FunctionExit
179 // BLR X16 ; call the tracing trampoline
180 // ;DATA: 32 bits of function ID
181 // ;DATA: lower 32 bits of the address of the trampoline
182 // ;DATA: higher 32 bits of the address of the trampoline
183 // LDP X0, X30, [SP], #16 ; pop X0 and the link register from the stack
185 OutStreamer->EmitCodeAlignment(4);
186 auto CurSled = OutContext.createTempSymbol("xray_sled_", true);
187 OutStreamer->EmitLabel(CurSled);
188 auto Target = OutContext.createTempSymbol();
190 // Emit "B #32" instruction, which jumps over the next 28 bytes.
191 // The operand has to be the number of 4-byte instructions to jump over,
192 // including the current instruction.
193 EmitToStreamer(*OutStreamer, MCInstBuilder(AArch64::B).addImm(8));
195 for (int8_t I = 0; I < NoopsInSledCount; I++)
196 EmitToStreamer(*OutStreamer, MCInstBuilder(AArch64::HINT).addImm(0));
198 OutStreamer->EmitLabel(Target);
199 recordSled(CurSled, MI, Kind);
202 void AArch64AsmPrinter::EmitEndOfAsmFile(Module &M) {
203 const Triple &TT = TM.getTargetTriple();
204 if (TT.isOSBinFormatMachO()) {
205 // Funny Darwin hack: This flag tells the linker that no global symbols
206 // contain code that falls through to other global symbols (e.g. the obvious
207 // implementation of multiple entry points). If this doesn't occur, the
208 // linker can safely perform dead code stripping. Since LLVM never
209 // generates code that does this, it is always safe to set.
210 OutStreamer->EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
211 SM.serializeToStackMapSection();
215 void AArch64AsmPrinter::EmitLOHs() {
216 SmallVector<MCSymbol *, 3> MCArgs;
218 for (const auto &D : AArch64FI->getLOHContainer()) {
219 for (const MachineInstr *MI : D.getArgs()) {
220 MInstToMCSymbol::iterator LabelIt = LOHInstToLabel.find(MI);
221 assert(LabelIt != LOHInstToLabel.end() &&
222 "Label hasn't been inserted for LOH related instruction");
223 MCArgs.push_back(LabelIt->second);
225 OutStreamer->EmitLOHDirective(D.getKind(), MCArgs);
230 void AArch64AsmPrinter::EmitFunctionBodyEnd() {
231 if (!AArch64FI->getLOHRelated().empty())
235 /// GetCPISymbol - Return the symbol for the specified constant pool entry.
236 MCSymbol *AArch64AsmPrinter::GetCPISymbol(unsigned CPID) const {
237 // Darwin uses a linker-private symbol name for constant-pools (to
238 // avoid addends on the relocation?), ELF has no such concept and
239 // uses a normal private symbol.
240 if (!getDataLayout().getLinkerPrivateGlobalPrefix().empty())
241 return OutContext.getOrCreateSymbol(
242 Twine(getDataLayout().getLinkerPrivateGlobalPrefix()) + "CPI" +
243 Twine(getFunctionNumber()) + "_" + Twine(CPID));
245 return AsmPrinter::GetCPISymbol(CPID);
248 void AArch64AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNum,
250 const MachineOperand &MO = MI->getOperand(OpNum);
251 switch (MO.getType()) {
253 llvm_unreachable("<unknown operand type>");
254 case MachineOperand::MO_Register: {
255 unsigned Reg = MO.getReg();
256 assert(TargetRegisterInfo::isPhysicalRegister(Reg));
257 assert(!MO.getSubReg() && "Subregs should be eliminated!");
258 O << AArch64InstPrinter::getRegisterName(Reg);
261 case MachineOperand::MO_Immediate: {
262 int64_t Imm = MO.getImm();
266 case MachineOperand::MO_GlobalAddress: {
267 const GlobalValue *GV = MO.getGlobal();
268 MCSymbol *Sym = getSymbol(GV);
270 // FIXME: Can we get anything other than a plain symbol here?
271 assert(!MO.getTargetFlags() && "Unknown operand target flag!");
274 printOffset(MO.getOffset(), O);
277 case MachineOperand::MO_BlockAddress: {
278 MCSymbol *Sym = GetBlockAddressSymbol(MO.getBlockAddress());
285 bool AArch64AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode,
287 unsigned Reg = MO.getReg();
290 return true; // Unknown mode.
292 Reg = getWRegFromXReg(Reg);
295 Reg = getXRegFromWReg(Reg);
299 O << AArch64InstPrinter::getRegisterName(Reg);
303 // Prints the register in MO using class RC using the offset in the
304 // new register class. This should not be used for cross class
306 bool AArch64AsmPrinter::printAsmRegInClass(const MachineOperand &MO,
307 const TargetRegisterClass *RC,
308 bool isVector, raw_ostream &O) {
309 assert(MO.isReg() && "Should only get here with a register!");
310 const TargetRegisterInfo *RI = STI->getRegisterInfo();
311 unsigned Reg = MO.getReg();
312 unsigned RegToPrint = RC->getRegister(RI->getEncodingValue(Reg));
313 assert(RI->regsOverlap(RegToPrint, Reg));
314 O << AArch64InstPrinter::getRegisterName(
315 RegToPrint, isVector ? AArch64::vreg : AArch64::NoRegAltName);
319 bool AArch64AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
321 const char *ExtraCode, raw_ostream &O) {
322 const MachineOperand &MO = MI->getOperand(OpNum);
324 // First try the generic code, which knows about modifiers like 'c' and 'n'.
325 if (!AsmPrinter::PrintAsmOperand(MI, OpNum, AsmVariant, ExtraCode, O))
328 // Does this asm operand have a single letter operand modifier?
329 if (ExtraCode && ExtraCode[0]) {
330 if (ExtraCode[1] != 0)
331 return true; // Unknown modifier.
333 switch (ExtraCode[0]) {
335 return true; // Unknown modifier.
336 case 'a': // Print 'a' modifier
337 PrintAsmMemoryOperand(MI, OpNum, AsmVariant, ExtraCode, O);
339 case 'w': // Print W register
340 case 'x': // Print X register
342 return printAsmMRegister(MO, ExtraCode[0], O);
343 if (MO.isImm() && MO.getImm() == 0) {
344 unsigned Reg = ExtraCode[0] == 'w' ? AArch64::WZR : AArch64::XZR;
345 O << AArch64InstPrinter::getRegisterName(Reg);
348 printOperand(MI, OpNum, O);
350 case 'b': // Print B register.
351 case 'h': // Print H register.
352 case 's': // Print S register.
353 case 'd': // Print D register.
354 case 'q': // Print Q register.
356 const TargetRegisterClass *RC;
357 switch (ExtraCode[0]) {
359 RC = &AArch64::FPR8RegClass;
362 RC = &AArch64::FPR16RegClass;
365 RC = &AArch64::FPR32RegClass;
368 RC = &AArch64::FPR64RegClass;
371 RC = &AArch64::FPR128RegClass;
376 return printAsmRegInClass(MO, RC, false /* vector */, O);
378 printOperand(MI, OpNum, O);
383 // According to ARM, we should emit x and v registers unless we have a
386 unsigned Reg = MO.getReg();
388 // If this is a w or x register, print an x register.
389 if (AArch64::GPR32allRegClass.contains(Reg) ||
390 AArch64::GPR64allRegClass.contains(Reg))
391 return printAsmMRegister(MO, 'x', O);
393 // If this is a b, h, s, d, or q register, print it as a v register.
394 return printAsmRegInClass(MO, &AArch64::FPR128RegClass, true /* vector */,
398 printOperand(MI, OpNum, O);
402 bool AArch64AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
405 const char *ExtraCode,
407 if (ExtraCode && ExtraCode[0] && ExtraCode[0] != 'a')
408 return true; // Unknown modifier.
410 const MachineOperand &MO = MI->getOperand(OpNum);
411 assert(MO.isReg() && "unexpected inline asm memory operand");
412 O << "[" << AArch64InstPrinter::getRegisterName(MO.getReg()) << "]";
416 void AArch64AsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
418 unsigned NOps = MI->getNumOperands();
420 OS << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
421 // cast away const; DIetc do not take const operands for some reason.
422 OS << cast<DILocalVariable>(MI->getOperand(NOps - 2).getMetadata())
425 // Frame address. Currently handles register +- offset only.
426 assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm());
428 printOperand(MI, 0, OS);
430 printOperand(MI, 1, OS);
433 printOperand(MI, NOps - 2, OS);
436 void AArch64AsmPrinter::LowerSTACKMAP(MCStreamer &OutStreamer, StackMaps &SM,
437 const MachineInstr &MI) {
438 unsigned NumNOPBytes = StackMapOpers(&MI).getNumPatchBytes();
440 SM.recordStackMap(MI);
441 assert(NumNOPBytes % 4 == 0 && "Invalid number of NOP bytes requested!");
443 // Scan ahead to trim the shadow.
444 const MachineBasicBlock &MBB = *MI.getParent();
445 MachineBasicBlock::const_iterator MII(MI);
447 while (NumNOPBytes > 0) {
448 if (MII == MBB.end() || MII->isCall() ||
449 MII->getOpcode() == AArch64::DBG_VALUE ||
450 MII->getOpcode() == TargetOpcode::PATCHPOINT ||
451 MII->getOpcode() == TargetOpcode::STACKMAP)
458 for (unsigned i = 0; i < NumNOPBytes; i += 4)
459 EmitToStreamer(OutStreamer, MCInstBuilder(AArch64::HINT).addImm(0));
462 // Lower a patchpoint of the form:
463 // [<def>], <id>, <numBytes>, <target>, <numArgs>
464 void AArch64AsmPrinter::LowerPATCHPOINT(MCStreamer &OutStreamer, StackMaps &SM,
465 const MachineInstr &MI) {
466 SM.recordPatchPoint(MI);
468 PatchPointOpers Opers(&MI);
470 int64_t CallTarget = Opers.getCallTarget().getImm();
471 unsigned EncodedBytes = 0;
473 assert((CallTarget & 0xFFFFFFFFFFFF) == CallTarget &&
474 "High 16 bits of call target should be zero.");
475 unsigned ScratchReg = MI.getOperand(Opers.getNextScratchIdx()).getReg();
477 // Materialize the jump address:
478 EmitToStreamer(OutStreamer, MCInstBuilder(AArch64::MOVZXi)
480 .addImm((CallTarget >> 32) & 0xFFFF)
482 EmitToStreamer(OutStreamer, MCInstBuilder(AArch64::MOVKXi)
485 .addImm((CallTarget >> 16) & 0xFFFF)
487 EmitToStreamer(OutStreamer, MCInstBuilder(AArch64::MOVKXi)
490 .addImm(CallTarget & 0xFFFF)
492 EmitToStreamer(OutStreamer, MCInstBuilder(AArch64::BLR).addReg(ScratchReg));
495 unsigned NumBytes = Opers.getNumPatchBytes();
496 assert(NumBytes >= EncodedBytes &&
497 "Patchpoint can't request size less than the length of a call.");
498 assert((NumBytes - EncodedBytes) % 4 == 0 &&
499 "Invalid number of NOP bytes requested!");
500 for (unsigned i = EncodedBytes; i < NumBytes; i += 4)
501 EmitToStreamer(OutStreamer, MCInstBuilder(AArch64::HINT).addImm(0));
504 void AArch64AsmPrinter::EmitFMov0(const MachineInstr &MI) {
505 unsigned DestReg = MI.getOperand(0).getReg();
506 if (STI->hasZeroCycleZeroing() && !STI->hasZeroCycleZeroingFPWorkaround()) {
507 // Convert H/S/D register to corresponding Q register
508 if (AArch64::H0 <= DestReg && DestReg <= AArch64::H31)
509 DestReg = AArch64::Q0 + (DestReg - AArch64::H0);
510 else if (AArch64::S0 <= DestReg && DestReg <= AArch64::S31)
511 DestReg = AArch64::Q0 + (DestReg - AArch64::S0);
513 assert(AArch64::D0 <= DestReg && DestReg <= AArch64::D31);
514 DestReg = AArch64::Q0 + (DestReg - AArch64::D0);
517 MOVI.setOpcode(AArch64::MOVIv2d_ns);
518 MOVI.addOperand(MCOperand::createReg(DestReg));
519 MOVI.addOperand(MCOperand::createImm(0));
520 EmitToStreamer(*OutStreamer, MOVI);
523 switch (MI.getOpcode()) {
524 default: llvm_unreachable("Unexpected opcode");
525 case AArch64::FMOVH0:
526 FMov.setOpcode(AArch64::FMOVWHr);
527 FMov.addOperand(MCOperand::createReg(DestReg));
528 FMov.addOperand(MCOperand::createReg(AArch64::WZR));
530 case AArch64::FMOVS0:
531 FMov.setOpcode(AArch64::FMOVWSr);
532 FMov.addOperand(MCOperand::createReg(DestReg));
533 FMov.addOperand(MCOperand::createReg(AArch64::WZR));
535 case AArch64::FMOVD0:
536 FMov.setOpcode(AArch64::FMOVXDr);
537 FMov.addOperand(MCOperand::createReg(DestReg));
538 FMov.addOperand(MCOperand::createReg(AArch64::XZR));
541 EmitToStreamer(*OutStreamer, FMov);
545 // Simple pseudo-instructions have their lowering (with expansion to real
546 // instructions) auto-generated.
547 #include "AArch64GenMCPseudoLowering.inc"
549 void AArch64AsmPrinter::EmitInstruction(const MachineInstr *MI) {
550 // Do any auto-generated pseudo lowerings.
551 if (emitPseudoExpansionLowering(*OutStreamer, MI))
554 if (AArch64FI->getLOHRelated().count(MI)) {
555 // Generate a label for LOH related instruction
556 MCSymbol *LOHLabel = createTempSymbol("loh");
557 // Associate the instruction with the label
558 LOHInstToLabel[MI] = LOHLabel;
559 OutStreamer->EmitLabel(LOHLabel);
562 // Do any manual lowerings.
563 switch (MI->getOpcode()) {
566 case AArch64::MOVIv2d_ns:
567 // If the target has <rdar://problem/16473581>, lower this
568 // instruction to movi.16b instead.
569 if (STI->hasZeroCycleZeroingFPWorkaround() &&
570 MI->getOperand(1).getImm() == 0) {
572 TmpInst.setOpcode(AArch64::MOVIv16b_ns);
573 TmpInst.addOperand(MCOperand::createReg(MI->getOperand(0).getReg()));
574 TmpInst.addOperand(MCOperand::createImm(MI->getOperand(1).getImm()));
575 EmitToStreamer(*OutStreamer, TmpInst);
580 case AArch64::DBG_VALUE: {
581 if (isVerbose() && OutStreamer->hasRawTextSupport()) {
582 SmallString<128> TmpStr;
583 raw_svector_ostream OS(TmpStr);
584 PrintDebugValueComment(MI, OS);
585 OutStreamer->EmitRawText(StringRef(OS.str()));
590 // Tail calls use pseudo instructions so they have the proper code-gen
591 // attributes (isCall, isReturn, etc.). We lower them to the real
593 case AArch64::TCRETURNri: {
595 TmpInst.setOpcode(AArch64::BR);
596 TmpInst.addOperand(MCOperand::createReg(MI->getOperand(0).getReg()));
597 EmitToStreamer(*OutStreamer, TmpInst);
600 case AArch64::TCRETURNdi: {
602 MCInstLowering.lowerOperand(MI->getOperand(0), Dest);
604 TmpInst.setOpcode(AArch64::B);
605 TmpInst.addOperand(Dest);
606 EmitToStreamer(*OutStreamer, TmpInst);
609 case AArch64::TLSDESC_CALLSEQ: {
611 /// adrp x0, :tlsdesc:var
612 /// ldr x1, [x0, #:tlsdesc_lo12:var]
613 /// add x0, x0, #:tlsdesc_lo12:var
616 /// (TPIDR_EL0 offset now in x0)
617 const MachineOperand &MO_Sym = MI->getOperand(0);
618 MachineOperand MO_TLSDESC_LO12(MO_Sym), MO_TLSDESC(MO_Sym);
619 MCOperand Sym, SymTLSDescLo12, SymTLSDesc;
620 MO_TLSDESC_LO12.setTargetFlags(AArch64II::MO_TLS | AArch64II::MO_PAGEOFF);
621 MO_TLSDESC.setTargetFlags(AArch64II::MO_TLS | AArch64II::MO_PAGE);
622 MCInstLowering.lowerOperand(MO_Sym, Sym);
623 MCInstLowering.lowerOperand(MO_TLSDESC_LO12, SymTLSDescLo12);
624 MCInstLowering.lowerOperand(MO_TLSDESC, SymTLSDesc);
627 Adrp.setOpcode(AArch64::ADRP);
628 Adrp.addOperand(MCOperand::createReg(AArch64::X0));
629 Adrp.addOperand(SymTLSDesc);
630 EmitToStreamer(*OutStreamer, Adrp);
633 Ldr.setOpcode(AArch64::LDRXui);
634 Ldr.addOperand(MCOperand::createReg(AArch64::X1));
635 Ldr.addOperand(MCOperand::createReg(AArch64::X0));
636 Ldr.addOperand(SymTLSDescLo12);
637 Ldr.addOperand(MCOperand::createImm(0));
638 EmitToStreamer(*OutStreamer, Ldr);
641 Add.setOpcode(AArch64::ADDXri);
642 Add.addOperand(MCOperand::createReg(AArch64::X0));
643 Add.addOperand(MCOperand::createReg(AArch64::X0));
644 Add.addOperand(SymTLSDescLo12);
645 Add.addOperand(MCOperand::createImm(AArch64_AM::getShiftValue(0)));
646 EmitToStreamer(*OutStreamer, Add);
648 // Emit a relocation-annotation. This expands to no code, but requests
649 // the following instruction gets an R_AARCH64_TLSDESC_CALL.
651 TLSDescCall.setOpcode(AArch64::TLSDESCCALL);
652 TLSDescCall.addOperand(Sym);
653 EmitToStreamer(*OutStreamer, TLSDescCall);
656 Blr.setOpcode(AArch64::BLR);
657 Blr.addOperand(MCOperand::createReg(AArch64::X1));
658 EmitToStreamer(*OutStreamer, Blr);
663 case AArch64::FMOVH0:
664 case AArch64::FMOVS0:
665 case AArch64::FMOVD0:
669 case TargetOpcode::STACKMAP:
670 return LowerSTACKMAP(*OutStreamer, SM, *MI);
672 case TargetOpcode::PATCHPOINT:
673 return LowerPATCHPOINT(*OutStreamer, SM, *MI);
675 case TargetOpcode::PATCHABLE_FUNCTION_ENTER:
676 LowerPATCHABLE_FUNCTION_ENTER(*MI);
679 case TargetOpcode::PATCHABLE_FUNCTION_EXIT:
680 LowerPATCHABLE_FUNCTION_EXIT(*MI);
683 case TargetOpcode::PATCHABLE_TAIL_CALL:
684 LowerPATCHABLE_TAIL_CALL(*MI);
688 // Finally, do the automated lowerings for everything else.
690 MCInstLowering.Lower(MI, TmpInst);
691 EmitToStreamer(*OutStreamer, TmpInst);
694 // Force static initialization.
695 extern "C" void LLVMInitializeAArch64AsmPrinter() {
696 RegisterAsmPrinter<AArch64AsmPrinter> X(getTheAArch64leTarget());
697 RegisterAsmPrinter<AArch64AsmPrinter> Y(getTheAArch64beTarget());
698 RegisterAsmPrinter<AArch64AsmPrinter> Z(getTheARM64Target());