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 "ARMFPUName.h"
21 #include "ARMMachineFunctionInfo.h"
22 #include "ARMTargetMachine.h"
23 #include "ARMTargetObjectFile.h"
24 #include "InstPrinter/ARMInstPrinter.h"
25 #include "MCTargetDesc/ARMAddressingModes.h"
26 #include "MCTargetDesc/ARMMCExpr.h"
27 #include "llvm/ADT/SetVector.h"
28 #include "llvm/ADT/SmallString.h"
29 #include "llvm/Assembly/Writer.h"
30 #include "llvm/CodeGen/MachineFunctionPass.h"
31 #include "llvm/CodeGen/MachineJumpTableInfo.h"
32 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
33 #include "llvm/DebugInfo.h"
34 #include "llvm/IR/Constants.h"
35 #include "llvm/IR/DataLayout.h"
36 #include "llvm/IR/Module.h"
37 #include "llvm/IR/Type.h"
38 #include "llvm/MC/MCAsmInfo.h"
39 #include "llvm/MC/MCAssembler.h"
40 #include "llvm/MC/MCContext.h"
41 #include "llvm/MC/MCELFStreamer.h"
42 #include "llvm/MC/MCInst.h"
43 #include "llvm/MC/MCInstBuilder.h"
44 #include "llvm/MC/MCObjectStreamer.h"
45 #include "llvm/MC/MCSectionMachO.h"
46 #include "llvm/MC/MCStreamer.h"
47 #include "llvm/MC/MCSymbol.h"
48 #include "llvm/Support/CommandLine.h"
49 #include "llvm/Support/Debug.h"
50 #include "llvm/Support/ELF.h"
51 #include "llvm/Support/ErrorHandling.h"
52 #include "llvm/Support/TargetRegistry.h"
53 #include "llvm/Support/raw_ostream.h"
54 #include "llvm/Target/Mangler.h"
55 #include "llvm/Target/TargetMachine.h"
59 /// EmitDwarfRegOp - Emit dwarf register operation.
60 void ARMAsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc,
61 bool Indirect) const {
62 const TargetRegisterInfo *RI = TM.getRegisterInfo();
63 if (RI->getDwarfRegNum(MLoc.getReg(), false) != -1) {
64 AsmPrinter::EmitDwarfRegOp(MLoc, Indirect);
67 assert(MLoc.isReg() && !Indirect &&
68 "This doesn't support offset/indirection - implement it if needed");
69 unsigned Reg = MLoc.getReg();
70 if (Reg >= ARM::S0 && Reg <= ARM::S31) {
71 assert(ARM::S0 + 31 == ARM::S31 && "Unexpected ARM S register numbering");
72 // S registers are described as bit-pieces of a register
73 // S[2x] = DW_OP_regx(256 + (x>>1)) DW_OP_bit_piece(32, 0)
74 // S[2x+1] = DW_OP_regx(256 + (x>>1)) DW_OP_bit_piece(32, 32)
76 unsigned SReg = Reg - ARM::S0;
77 bool odd = SReg & 0x1;
78 unsigned Rx = 256 + (SReg >> 1);
80 OutStreamer.AddComment("DW_OP_regx for S register");
81 EmitInt8(dwarf::DW_OP_regx);
83 OutStreamer.AddComment(Twine(SReg));
87 OutStreamer.AddComment("DW_OP_bit_piece 32 32");
88 EmitInt8(dwarf::DW_OP_bit_piece);
92 OutStreamer.AddComment("DW_OP_bit_piece 32 0");
93 EmitInt8(dwarf::DW_OP_bit_piece);
97 } else if (Reg >= ARM::Q0 && Reg <= ARM::Q15) {
98 assert(ARM::Q0 + 15 == ARM::Q15 && "Unexpected ARM Q register numbering");
99 // Q registers Q0-Q15 are described by composing two D registers together.
100 // Qx = DW_OP_regx(256+2x) DW_OP_piece(8) DW_OP_regx(256+2x+1)
103 unsigned QReg = Reg - ARM::Q0;
104 unsigned D1 = 256 + 2 * QReg;
105 unsigned D2 = D1 + 1;
107 OutStreamer.AddComment("DW_OP_regx for Q register: D1");
108 EmitInt8(dwarf::DW_OP_regx);
110 OutStreamer.AddComment("DW_OP_piece 8");
111 EmitInt8(dwarf::DW_OP_piece);
114 OutStreamer.AddComment("DW_OP_regx for Q register: D2");
115 EmitInt8(dwarf::DW_OP_regx);
117 OutStreamer.AddComment("DW_OP_piece 8");
118 EmitInt8(dwarf::DW_OP_piece);
123 void ARMAsmPrinter::EmitFunctionBodyEnd() {
124 // Make sure to terminate any constant pools that were at the end
128 InConstantPool = false;
129 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
132 void ARMAsmPrinter::EmitFunctionEntryLabel() {
133 if (AFI->isThumbFunction()) {
134 OutStreamer.EmitAssemblerFlag(MCAF_Code16);
135 OutStreamer.EmitThumbFunc(CurrentFnSym);
138 OutStreamer.EmitLabel(CurrentFnSym);
141 void ARMAsmPrinter::EmitXXStructor(const Constant *CV) {
142 uint64_t Size = TM.getDataLayout()->getTypeAllocSize(CV->getType());
143 assert(Size && "C++ constructor pointer had zero size!");
145 const GlobalValue *GV = dyn_cast<GlobalValue>(CV->stripPointerCasts());
146 assert(GV && "C++ constructor pointer was not a GlobalValue!");
148 const MCExpr *E = MCSymbolRefExpr::Create(getSymbol(GV),
149 (Subtarget->isTargetDarwin()
150 ? MCSymbolRefExpr::VK_None
151 : MCSymbolRefExpr::VK_ARM_TARGET1),
154 OutStreamer.EmitValue(E, Size);
157 /// runOnMachineFunction - This uses the EmitInstruction()
158 /// method to print assembly for each instruction.
160 bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
161 AFI = MF.getInfo<ARMFunctionInfo>();
162 MCP = MF.getConstantPool();
164 return AsmPrinter::runOnMachineFunction(MF);
167 void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
168 raw_ostream &O, const char *Modifier) {
169 const MachineOperand &MO = MI->getOperand(OpNum);
170 unsigned TF = MO.getTargetFlags();
172 switch (MO.getType()) {
173 default: llvm_unreachable("<unknown operand type>");
174 case MachineOperand::MO_Register: {
175 unsigned Reg = MO.getReg();
176 assert(TargetRegisterInfo::isPhysicalRegister(Reg));
177 assert(!MO.getSubReg() && "Subregs should be eliminated!");
178 if(ARM::GPRPairRegClass.contains(Reg)) {
179 const MachineFunction &MF = *MI->getParent()->getParent();
180 const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
181 Reg = TRI->getSubReg(Reg, ARM::gsub_0);
183 O << ARMInstPrinter::getRegisterName(Reg);
186 case MachineOperand::MO_Immediate: {
187 int64_t Imm = MO.getImm();
189 if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
190 (TF == ARMII::MO_LO16))
192 else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
193 (TF == ARMII::MO_HI16))
198 case MachineOperand::MO_MachineBasicBlock:
199 O << *MO.getMBB()->getSymbol();
201 case MachineOperand::MO_GlobalAddress: {
202 const GlobalValue *GV = MO.getGlobal();
203 if ((Modifier && strcmp(Modifier, "lo16") == 0) ||
204 (TF & ARMII::MO_LO16))
206 else if ((Modifier && strcmp(Modifier, "hi16") == 0) ||
207 (TF & ARMII::MO_HI16))
211 printOffset(MO.getOffset(), O);
212 if (TF == ARMII::MO_PLT)
216 case MachineOperand::MO_ConstantPoolIndex:
217 O << *GetCPISymbol(MO.getIndex());
222 //===--------------------------------------------------------------------===//
224 MCSymbol *ARMAsmPrinter::
225 GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const {
226 SmallString<60> Name;
227 raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "JTI"
228 << getFunctionNumber() << '_' << uid << '_' << uid2;
229 return OutContext.GetOrCreateSymbol(Name.str());
233 MCSymbol *ARMAsmPrinter::GetARMSJLJEHLabel() const {
234 SmallString<60> Name;
235 raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "SJLJEH"
236 << getFunctionNumber();
237 return OutContext.GetOrCreateSymbol(Name.str());
240 bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
241 unsigned AsmVariant, const char *ExtraCode,
243 // Does this asm operand have a single letter operand modifier?
244 if (ExtraCode && ExtraCode[0]) {
245 if (ExtraCode[1] != 0) return true; // Unknown modifier.
247 switch (ExtraCode[0]) {
249 // See if this is a generic print operand
250 return AsmPrinter::PrintAsmOperand(MI, OpNum, AsmVariant, ExtraCode, O);
251 case 'a': // Print as a memory address.
252 if (MI->getOperand(OpNum).isReg()) {
254 << ARMInstPrinter::getRegisterName(MI->getOperand(OpNum).getReg())
259 case 'c': // Don't print "#" before an immediate operand.
260 if (!MI->getOperand(OpNum).isImm())
262 O << MI->getOperand(OpNum).getImm();
264 case 'P': // Print a VFP double precision register.
265 case 'q': // Print a NEON quad precision register.
266 printOperand(MI, OpNum, O);
268 case 'y': // Print a VFP single precision register as indexed double.
269 if (MI->getOperand(OpNum).isReg()) {
270 unsigned Reg = MI->getOperand(OpNum).getReg();
271 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
272 // Find the 'd' register that has this 's' register as a sub-register,
273 // and determine the lane number.
274 for (MCSuperRegIterator SR(Reg, TRI); SR.isValid(); ++SR) {
275 if (!ARM::DPRRegClass.contains(*SR))
277 bool Lane0 = TRI->getSubReg(*SR, ARM::ssub_0) == Reg;
278 O << ARMInstPrinter::getRegisterName(*SR) << (Lane0 ? "[0]" : "[1]");
283 case 'B': // Bitwise inverse of integer or symbol without a preceding #.
284 if (!MI->getOperand(OpNum).isImm())
286 O << ~(MI->getOperand(OpNum).getImm());
288 case 'L': // The low 16 bits of an immediate constant.
289 if (!MI->getOperand(OpNum).isImm())
291 O << (MI->getOperand(OpNum).getImm() & 0xffff);
293 case 'M': { // A register range suitable for LDM/STM.
294 if (!MI->getOperand(OpNum).isReg())
296 const MachineOperand &MO = MI->getOperand(OpNum);
297 unsigned RegBegin = MO.getReg();
298 // This takes advantage of the 2 operand-ness of ldm/stm and that we've
299 // already got the operands in registers that are operands to the
300 // inline asm statement.
302 if (ARM::GPRPairRegClass.contains(RegBegin)) {
303 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
304 unsigned Reg0 = TRI->getSubReg(RegBegin, ARM::gsub_0);
305 O << ARMInstPrinter::getRegisterName(Reg0) << ", ";;
306 RegBegin = TRI->getSubReg(RegBegin, ARM::gsub_1);
308 O << ARMInstPrinter::getRegisterName(RegBegin);
310 // FIXME: The register allocator not only may not have given us the
311 // registers in sequence, but may not be in ascending registers. This
312 // will require changes in the register allocator that'll need to be
313 // propagated down here if the operands change.
314 unsigned RegOps = OpNum + 1;
315 while (MI->getOperand(RegOps).isReg()) {
317 << ARMInstPrinter::getRegisterName(MI->getOperand(RegOps).getReg());
325 case 'R': // The most significant register of a pair.
326 case 'Q': { // The least significant register of a pair.
329 const MachineOperand &FlagsOP = MI->getOperand(OpNum - 1);
330 if (!FlagsOP.isImm())
332 unsigned Flags = FlagsOP.getImm();
334 // This operand may not be the one that actually provides the register. If
335 // it's tied to a previous one then we should refer instead to that one
336 // for registers and their classes.
338 if (InlineAsm::isUseOperandTiedToDef(Flags, TiedIdx)) {
339 for (OpNum = InlineAsm::MIOp_FirstOperand; TiedIdx; --TiedIdx) {
340 unsigned OpFlags = MI->getOperand(OpNum).getImm();
341 OpNum += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
343 Flags = MI->getOperand(OpNum).getImm();
345 // Later code expects OpNum to be pointing at the register rather than
350 unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
352 InlineAsm::hasRegClassConstraint(Flags, RC);
353 if (RC == ARM::GPRPairRegClassID) {
356 const MachineOperand &MO = MI->getOperand(OpNum);
359 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
360 unsigned Reg = TRI->getSubReg(MO.getReg(), ExtraCode[0] == 'Q' ?
361 ARM::gsub_0 : ARM::gsub_1);
362 O << ARMInstPrinter::getRegisterName(Reg);
367 unsigned RegOp = ExtraCode[0] == 'Q' ? OpNum : OpNum + 1;
368 if (RegOp >= MI->getNumOperands())
370 const MachineOperand &MO = MI->getOperand(RegOp);
373 unsigned Reg = MO.getReg();
374 O << ARMInstPrinter::getRegisterName(Reg);
378 case 'e': // The low doubleword register of a NEON quad register.
379 case 'f': { // The high doubleword register of a NEON quad register.
380 if (!MI->getOperand(OpNum).isReg())
382 unsigned Reg = MI->getOperand(OpNum).getReg();
383 if (!ARM::QPRRegClass.contains(Reg))
385 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
386 unsigned SubReg = TRI->getSubReg(Reg, ExtraCode[0] == 'e' ?
387 ARM::dsub_0 : ARM::dsub_1);
388 O << ARMInstPrinter::getRegisterName(SubReg);
392 // This modifier is not yet supported.
393 case 'h': // A range of VFP/NEON registers suitable for VLD1/VST1.
395 case 'H': { // The highest-numbered register of a pair.
396 const MachineOperand &MO = MI->getOperand(OpNum);
399 const MachineFunction &MF = *MI->getParent()->getParent();
400 const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
401 unsigned Reg = MO.getReg();
402 if(!ARM::GPRPairRegClass.contains(Reg))
404 Reg = TRI->getSubReg(Reg, ARM::gsub_1);
405 O << ARMInstPrinter::getRegisterName(Reg);
411 printOperand(MI, OpNum, O);
415 bool ARMAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
416 unsigned OpNum, unsigned AsmVariant,
417 const char *ExtraCode,
419 // Does this asm operand have a single letter operand modifier?
420 if (ExtraCode && ExtraCode[0]) {
421 if (ExtraCode[1] != 0) return true; // Unknown modifier.
423 switch (ExtraCode[0]) {
424 case 'A': // A memory operand for a VLD1/VST1 instruction.
425 default: return true; // Unknown modifier.
426 case 'm': // The base register of a memory operand.
427 if (!MI->getOperand(OpNum).isReg())
429 O << ARMInstPrinter::getRegisterName(MI->getOperand(OpNum).getReg());
434 const MachineOperand &MO = MI->getOperand(OpNum);
435 assert(MO.isReg() && "unexpected inline asm memory operand");
436 O << "[" << ARMInstPrinter::getRegisterName(MO.getReg()) << "]";
440 void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) {
441 if (Subtarget->isTargetDarwin()) {
442 Reloc::Model RelocM = TM.getRelocationModel();
443 if (RelocM == Reloc::PIC_ || RelocM == Reloc::DynamicNoPIC) {
444 // Declare all the text sections up front (before the DWARF sections
445 // emitted by AsmPrinter::doInitialization) so the assembler will keep
446 // them together at the beginning of the object file. This helps
447 // avoid out-of-range branches that are due a fundamental limitation of
448 // the way symbol offsets are encoded with the current Darwin ARM
450 const TargetLoweringObjectFileMachO &TLOFMacho =
451 static_cast<const TargetLoweringObjectFileMachO &>(
452 getObjFileLowering());
454 // Collect the set of sections our functions will go into.
455 SetVector<const MCSection *, SmallVector<const MCSection *, 8>,
456 SmallPtrSet<const MCSection *, 8> > TextSections;
457 // Default text section comes first.
458 TextSections.insert(TLOFMacho.getTextSection());
459 // Now any user defined text sections from function attributes.
460 for (Module::iterator F = M.begin(), e = M.end(); F != e; ++F)
461 if (!F->isDeclaration() && !F->hasAvailableExternallyLinkage())
462 TextSections.insert(TLOFMacho.SectionForGlobal(F, Mang, TM));
463 // Now the coalescable sections.
464 TextSections.insert(TLOFMacho.getTextCoalSection());
465 TextSections.insert(TLOFMacho.getConstTextCoalSection());
467 // Emit the sections in the .s file header to fix the order.
468 for (unsigned i = 0, e = TextSections.size(); i != e; ++i)
469 OutStreamer.SwitchSection(TextSections[i]);
471 if (RelocM == Reloc::DynamicNoPIC) {
472 const MCSection *sect =
473 OutContext.getMachOSection("__TEXT", "__symbol_stub4",
474 MCSectionMachO::S_SYMBOL_STUBS,
475 12, SectionKind::getText());
476 OutStreamer.SwitchSection(sect);
478 const MCSection *sect =
479 OutContext.getMachOSection("__TEXT", "__picsymbolstub4",
480 MCSectionMachO::S_SYMBOL_STUBS,
481 16, SectionKind::getText());
482 OutStreamer.SwitchSection(sect);
484 const MCSection *StaticInitSect =
485 OutContext.getMachOSection("__TEXT", "__StaticInit",
486 MCSectionMachO::S_REGULAR |
487 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
488 SectionKind::getText());
489 OutStreamer.SwitchSection(StaticInitSect);
492 // Compiling with debug info should not affect the code
493 // generation! Since some of the data sections are first switched
494 // to only in ASMPrinter::doFinalization(), the debug info
495 // sections would come before the data sections in the object
496 // file. This is problematic, since PC-relative loads have to use
497 // different instruction sequences in order to reach global data
498 // in the same object file.
499 OutStreamer.SwitchSection(getObjFileLowering().getCStringSection());
500 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
501 OutStreamer.SwitchSection(getObjFileLowering().getDataCommonSection());
502 OutStreamer.SwitchSection(getObjFileLowering().getDataBSSSection());
503 OutStreamer.SwitchSection(getObjFileLowering().getNonLazySymbolPointerSection());
506 // Use unified assembler syntax.
507 OutStreamer.EmitAssemblerFlag(MCAF_SyntaxUnified);
509 // Emit ARM Build Attributes
510 if (Subtarget->isTargetELF())
515 void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
516 if (Subtarget->isTargetDarwin()) {
517 // All darwin targets use mach-o.
518 const TargetLoweringObjectFileMachO &TLOFMacho =
519 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
520 MachineModuleInfoMachO &MMIMacho =
521 MMI->getObjFileInfo<MachineModuleInfoMachO>();
523 // Output non-lazy-pointers for external and common global variables.
524 MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetGVStubList();
526 if (!Stubs.empty()) {
527 // Switch with ".non_lazy_symbol_pointer" directive.
528 OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
530 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
532 OutStreamer.EmitLabel(Stubs[i].first);
533 // .indirect_symbol _foo
534 MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
535 OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),MCSA_IndirectSymbol);
538 // External to current translation unit.
539 OutStreamer.EmitIntValue(0, 4/*size*/);
541 // Internal to current translation unit.
543 // When we place the LSDA into the TEXT section, the type info
544 // pointers need to be indirect and pc-rel. We accomplish this by
545 // using NLPs; however, sometimes the types are local to the file.
546 // We need to fill in the value for the NLP in those cases.
547 OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
553 OutStreamer.AddBlankLine();
556 Stubs = MMIMacho.GetHiddenGVStubList();
557 if (!Stubs.empty()) {
558 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
560 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
562 OutStreamer.EmitLabel(Stubs[i].first);
564 OutStreamer.EmitValue(MCSymbolRefExpr::
565 Create(Stubs[i].second.getPointer(),
571 OutStreamer.AddBlankLine();
574 // Funny Darwin hack: This flag tells the linker that no global symbols
575 // contain code that falls through to other global symbols (e.g. the obvious
576 // implementation of multiple entry points). If this doesn't occur, the
577 // linker can safely perform dead code stripping. Since LLVM never
578 // generates code that does this, it is always safe to set.
579 OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
583 //===----------------------------------------------------------------------===//
584 // Helper routines for EmitStartOfAsmFile() and EmitEndOfAsmFile()
586 // The following seem like one-off assembler flags, but they actually need
587 // to appear in the .ARM.attributes section in ELF.
588 // Instead of subclassing the MCELFStreamer, we do the work here.
590 static ARMBuildAttrs::CPUArch getArchForCPU(StringRef CPU,
591 const ARMSubtarget *Subtarget) {
593 return ARMBuildAttrs::v5TEJ;
595 if (Subtarget->hasV8Ops())
596 return ARMBuildAttrs::v8;
597 else if (Subtarget->hasV7Ops()) {
598 if (Subtarget->isMClass() && Subtarget->hasThumb2DSP())
599 return ARMBuildAttrs::v7E_M;
600 return ARMBuildAttrs::v7;
601 } else if (Subtarget->hasV6T2Ops())
602 return ARMBuildAttrs::v6T2;
603 else if (Subtarget->hasV6MOps())
604 return ARMBuildAttrs::v6S_M;
605 else if (Subtarget->hasV6Ops())
606 return ARMBuildAttrs::v6;
607 else if (Subtarget->hasV5TEOps())
608 return ARMBuildAttrs::v5TE;
609 else if (Subtarget->hasV5TOps())
610 return ARMBuildAttrs::v5T;
611 else if (Subtarget->hasV4TOps())
612 return ARMBuildAttrs::v4T;
614 return ARMBuildAttrs::v4;
617 void ARMAsmPrinter::emitAttributes() {
618 MCTargetStreamer &TS = OutStreamer.getTargetStreamer();
619 ARMTargetStreamer &ATS = static_cast<ARMTargetStreamer &>(TS);
621 ATS.switchVendor("aeabi");
623 std::string CPUString = Subtarget->getCPUString();
625 // FIXME: remove krait check when GNU tools support krait cpu
626 if (CPUString != "generic" && CPUString != "krait")
627 ATS.emitTextAttribute(ARMBuildAttrs::CPU_name, CPUString);
629 ATS.emitAttribute(ARMBuildAttrs::CPU_arch,
630 getArchForCPU(CPUString, Subtarget));
632 if (Subtarget->isAClass()) {
633 ATS.emitAttribute(ARMBuildAttrs::CPU_arch_profile,
634 ARMBuildAttrs::ApplicationProfile);
635 } else if (Subtarget->isRClass()) {
636 ATS.emitAttribute(ARMBuildAttrs::CPU_arch_profile,
637 ARMBuildAttrs::RealTimeProfile);
638 } else if (Subtarget->isMClass()){
639 ATS.emitAttribute(ARMBuildAttrs::CPU_arch_profile,
640 ARMBuildAttrs::MicroControllerProfile);
643 ATS.emitAttribute(ARMBuildAttrs::ARM_ISA_use, Subtarget->hasARMOps() ?
644 ARMBuildAttrs::Allowed : ARMBuildAttrs::Not_Allowed);
645 if (Subtarget->isThumb1Only()) {
646 ATS.emitAttribute(ARMBuildAttrs::THUMB_ISA_use,
647 ARMBuildAttrs::Allowed);
648 } else if (Subtarget->hasThumb2()) {
649 ATS.emitAttribute(ARMBuildAttrs::THUMB_ISA_use,
650 ARMBuildAttrs::AllowThumb32);
653 if (Subtarget->hasNEON()) {
654 /* NEON is not exactly a VFP architecture, but GAS emit one of
655 * neon/neon-fp-armv8/neon-vfpv4/vfpv3/vfpv2 for .fpu parameters */
656 if (Subtarget->hasFPARMv8()) {
657 if (Subtarget->hasCrypto())
658 ATS.emitFPU(ARM::CRYPTO_NEON_FP_ARMV8);
660 ATS.emitFPU(ARM::NEON_FP_ARMV8);
662 else if (Subtarget->hasVFP4())
663 ATS.emitFPU(ARM::NEON_VFPV4);
665 ATS.emitFPU(ARM::NEON);
666 // Emit Tag_Advanced_SIMD_arch for ARMv8 architecture
667 if (Subtarget->hasV8Ops())
668 ATS.emitAttribute(ARMBuildAttrs::Advanced_SIMD_arch,
669 ARMBuildAttrs::AllowNeonARMv8);
671 if (Subtarget->hasFPARMv8())
672 ATS.emitFPU(ARM::FP_ARMV8);
673 else if (Subtarget->hasVFP4())
674 ATS.emitFPU(Subtarget->hasD16() ? ARM::VFPV4_D16 : ARM::VFPV4);
675 else if (Subtarget->hasVFP3())
676 ATS.emitFPU(Subtarget->hasD16() ? ARM::VFPV3_D16 : ARM::VFPV3);
677 else if (Subtarget->hasVFP2())
678 ATS.emitFPU(ARM::VFPV2);
681 // Signal various FP modes.
682 if (!TM.Options.UnsafeFPMath) {
683 ATS.emitAttribute(ARMBuildAttrs::ABI_FP_denormal, ARMBuildAttrs::Allowed);
684 ATS.emitAttribute(ARMBuildAttrs::ABI_FP_exceptions,
685 ARMBuildAttrs::Allowed);
688 if (TM.Options.NoInfsFPMath && TM.Options.NoNaNsFPMath)
689 ATS.emitAttribute(ARMBuildAttrs::ABI_FP_number_model,
690 ARMBuildAttrs::Allowed);
692 ATS.emitAttribute(ARMBuildAttrs::ABI_FP_number_model,
693 ARMBuildAttrs::AllowIEE754);
695 // FIXME: add more flags to ARMBuildAttrs.h
696 // 8-bytes alignment stuff.
697 ATS.emitAttribute(ARMBuildAttrs::ABI_align8_needed, 1);
698 ATS.emitAttribute(ARMBuildAttrs::ABI_align8_preserved, 1);
700 // ABI_HardFP_use attribute to indicate single precision FP.
701 if (Subtarget->isFPOnlySP())
702 ATS.emitAttribute(ARMBuildAttrs::ABI_HardFP_use,
703 ARMBuildAttrs::HardFPSinglePrecision);
705 // Hard float. Use both S and D registers and conform to AAPCS-VFP.
706 if (Subtarget->isAAPCS_ABI() && TM.Options.FloatABIType == FloatABI::Hard)
707 ATS.emitAttribute(ARMBuildAttrs::ABI_VFP_args, ARMBuildAttrs::HardFPAAPCS);
709 // FIXME: Should we signal R9 usage?
711 if (Subtarget->hasFP16())
712 ATS.emitAttribute(ARMBuildAttrs::FP_HP_extension, ARMBuildAttrs::AllowHPFP);
714 if (Subtarget->hasMPExtension())
715 ATS.emitAttribute(ARMBuildAttrs::MPextension_use, ARMBuildAttrs::AllowMP);
717 if (Subtarget->hasDivide()) {
718 // Check if hardware divide is only available in thumb2 or ARM as well.
719 ATS.emitAttribute(ARMBuildAttrs::DIV_use,
720 Subtarget->hasDivideInARMMode() ? ARMBuildAttrs::AllowDIVExt :
721 ARMBuildAttrs::AllowDIVIfExists);
724 if (Subtarget->hasTrustZone() && Subtarget->hasVirtualization())
725 ATS.emitAttribute(ARMBuildAttrs::Virtualization_use,
726 ARMBuildAttrs::AllowTZVirtualization);
727 else if (Subtarget->hasTrustZone())
728 ATS.emitAttribute(ARMBuildAttrs::Virtualization_use,
729 ARMBuildAttrs::AllowTZ);
730 else if (Subtarget->hasVirtualization())
731 ATS.emitAttribute(ARMBuildAttrs::Virtualization_use,
732 ARMBuildAttrs::AllowVirtualization);
734 ATS.finishAttributeSection();
737 void ARMAsmPrinter::emitARMAttributeSection() {
739 // [ <section-length> "vendor-name"
740 // [ <file-tag> <size> <attribute>*
741 // | <section-tag> <size> <section-number>* 0 <attribute>*
742 // | <symbol-tag> <size> <symbol-number>* 0 <attribute>*
746 if (OutStreamer.hasRawTextSupport())
749 const ARMElfTargetObjectFile &TLOFELF =
750 static_cast<const ARMElfTargetObjectFile &>
751 (getObjFileLowering());
753 OutStreamer.SwitchSection(TLOFELF.getAttributesSection());
756 OutStreamer.EmitIntValue(0x41, 1);
759 //===----------------------------------------------------------------------===//
761 static MCSymbol *getPICLabel(const char *Prefix, unsigned FunctionNumber,
762 unsigned LabelId, MCContext &Ctx) {
764 MCSymbol *Label = Ctx.GetOrCreateSymbol(Twine(Prefix)
765 + "PC" + Twine(FunctionNumber) + "_" + Twine(LabelId));
769 static MCSymbolRefExpr::VariantKind
770 getModifierVariantKind(ARMCP::ARMCPModifier Modifier) {
772 case ARMCP::no_modifier: return MCSymbolRefExpr::VK_None;
773 case ARMCP::TLSGD: return MCSymbolRefExpr::VK_TLSGD;
774 case ARMCP::TPOFF: return MCSymbolRefExpr::VK_TPOFF;
775 case ARMCP::GOTTPOFF: return MCSymbolRefExpr::VK_GOTTPOFF;
776 case ARMCP::GOT: return MCSymbolRefExpr::VK_GOT;
777 case ARMCP::GOTOFF: return MCSymbolRefExpr::VK_GOTOFF;
779 llvm_unreachable("Invalid ARMCPModifier!");
782 MCSymbol *ARMAsmPrinter::GetARMGVSymbol(const GlobalValue *GV,
783 unsigned char TargetFlags) {
784 bool isIndirect = Subtarget->isTargetDarwin() &&
785 (TargetFlags & ARMII::MO_NONLAZY) &&
786 Subtarget->GVIsIndirectSymbol(GV, TM.getRelocationModel());
788 return getSymbol(GV);
790 // FIXME: Remove this when Darwin transition to @GOT like syntax.
791 MCSymbol *MCSym = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
792 MachineModuleInfoMachO &MMIMachO =
793 MMI->getObjFileInfo<MachineModuleInfoMachO>();
794 MachineModuleInfoImpl::StubValueTy &StubSym =
795 GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(MCSym) :
796 MMIMachO.getGVStubEntry(MCSym);
797 if (StubSym.getPointer() == 0)
798 StubSym = MachineModuleInfoImpl::
799 StubValueTy(getSymbol(GV), !GV->hasInternalLinkage());
804 EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
805 int Size = TM.getDataLayout()->getTypeAllocSize(MCPV->getType());
807 ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
810 if (ACPV->isLSDA()) {
811 SmallString<128> Str;
812 raw_svector_ostream OS(Str);
813 OS << MAI->getPrivateGlobalPrefix() << "_LSDA_" << getFunctionNumber();
814 MCSym = OutContext.GetOrCreateSymbol(OS.str());
815 } else if (ACPV->isBlockAddress()) {
816 const BlockAddress *BA =
817 cast<ARMConstantPoolConstant>(ACPV)->getBlockAddress();
818 MCSym = GetBlockAddressSymbol(BA);
819 } else if (ACPV->isGlobalValue()) {
820 const GlobalValue *GV = cast<ARMConstantPoolConstant>(ACPV)->getGV();
822 // On Darwin, const-pool entries may get the "FOO$non_lazy_ptr" mangling, so
823 // flag the global as MO_NONLAZY.
824 unsigned char TF = Subtarget->isTargetDarwin() ? ARMII::MO_NONLAZY : 0;
825 MCSym = GetARMGVSymbol(GV, TF);
826 } else if (ACPV->isMachineBasicBlock()) {
827 const MachineBasicBlock *MBB = cast<ARMConstantPoolMBB>(ACPV)->getMBB();
828 MCSym = MBB->getSymbol();
830 assert(ACPV->isExtSymbol() && "unrecognized constant pool value");
831 const char *Sym = cast<ARMConstantPoolSymbol>(ACPV)->getSymbol();
832 MCSym = GetExternalSymbolSymbol(Sym);
835 // Create an MCSymbol for the reference.
837 MCSymbolRefExpr::Create(MCSym, getModifierVariantKind(ACPV->getModifier()),
840 if (ACPV->getPCAdjustment()) {
841 MCSymbol *PCLabel = getPICLabel(MAI->getPrivateGlobalPrefix(),
845 const MCExpr *PCRelExpr = MCSymbolRefExpr::Create(PCLabel, OutContext);
847 MCBinaryExpr::CreateAdd(PCRelExpr,
848 MCConstantExpr::Create(ACPV->getPCAdjustment(),
851 if (ACPV->mustAddCurrentAddress()) {
852 // We want "(<expr> - .)", but MC doesn't have a concept of the '.'
853 // label, so just emit a local label end reference that instead.
854 MCSymbol *DotSym = OutContext.CreateTempSymbol();
855 OutStreamer.EmitLabel(DotSym);
856 const MCExpr *DotExpr = MCSymbolRefExpr::Create(DotSym, OutContext);
857 PCRelExpr = MCBinaryExpr::CreateSub(PCRelExpr, DotExpr, OutContext);
859 Expr = MCBinaryExpr::CreateSub(Expr, PCRelExpr, OutContext);
861 OutStreamer.EmitValue(Expr, Size);
864 void ARMAsmPrinter::EmitJumpTable(const MachineInstr *MI) {
865 unsigned Opcode = MI->getOpcode();
867 if (Opcode == ARM::BR_JTadd)
869 else if (Opcode == ARM::BR_JTm)
872 const MachineOperand &MO1 = MI->getOperand(OpNum);
873 const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
874 unsigned JTI = MO1.getIndex();
876 // Emit a label for the jump table.
877 MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
878 OutStreamer.EmitLabel(JTISymbol);
880 // Mark the jump table as data-in-code.
881 OutStreamer.EmitDataRegion(MCDR_DataRegionJT32);
883 // Emit each entry of the table.
884 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
885 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
886 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
888 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
889 MachineBasicBlock *MBB = JTBBs[i];
890 // Construct an MCExpr for the entry. We want a value of the form:
891 // (BasicBlockAddr - TableBeginAddr)
893 // For example, a table with entries jumping to basic blocks BB0 and BB1
896 // .word (LBB0 - LJTI_0_0)
897 // .word (LBB1 - LJTI_0_0)
898 const MCExpr *Expr = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext);
900 if (TM.getRelocationModel() == Reloc::PIC_)
901 Expr = MCBinaryExpr::CreateSub(Expr, MCSymbolRefExpr::Create(JTISymbol,
904 // If we're generating a table of Thumb addresses in static relocation
905 // model, we need to add one to keep interworking correctly.
906 else if (AFI->isThumbFunction())
907 Expr = MCBinaryExpr::CreateAdd(Expr, MCConstantExpr::Create(1,OutContext),
909 OutStreamer.EmitValue(Expr, 4);
911 // Mark the end of jump table data-in-code region.
912 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
915 void ARMAsmPrinter::EmitJump2Table(const MachineInstr *MI) {
916 unsigned Opcode = MI->getOpcode();
917 int OpNum = (Opcode == ARM::t2BR_JT) ? 2 : 1;
918 const MachineOperand &MO1 = MI->getOperand(OpNum);
919 const MachineOperand &MO2 = MI->getOperand(OpNum+1); // Unique Id
920 unsigned JTI = MO1.getIndex();
922 MCSymbol *JTISymbol = GetARMJTIPICJumpTableLabel2(JTI, MO2.getImm());
923 OutStreamer.EmitLabel(JTISymbol);
925 // Emit each entry of the table.
926 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
927 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
928 const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
929 unsigned OffsetWidth = 4;
930 if (MI->getOpcode() == ARM::t2TBB_JT) {
932 // Mark the jump table as data-in-code.
933 OutStreamer.EmitDataRegion(MCDR_DataRegionJT8);
934 } else if (MI->getOpcode() == ARM::t2TBH_JT) {
936 // Mark the jump table as data-in-code.
937 OutStreamer.EmitDataRegion(MCDR_DataRegionJT16);
940 for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
941 MachineBasicBlock *MBB = JTBBs[i];
942 const MCExpr *MBBSymbolExpr = MCSymbolRefExpr::Create(MBB->getSymbol(),
944 // If this isn't a TBB or TBH, the entries are direct branch instructions.
945 if (OffsetWidth == 4) {
946 OutStreamer.EmitInstruction(MCInstBuilder(ARM::t2B)
947 .addExpr(MBBSymbolExpr)
952 // Otherwise it's an offset from the dispatch instruction. Construct an
953 // MCExpr for the entry. We want a value of the form:
954 // (BasicBlockAddr - TableBeginAddr) / 2
956 // For example, a TBB table with entries jumping to basic blocks BB0 and BB1
959 // .byte (LBB0 - LJTI_0_0) / 2
960 // .byte (LBB1 - LJTI_0_0) / 2
962 MCBinaryExpr::CreateSub(MBBSymbolExpr,
963 MCSymbolRefExpr::Create(JTISymbol, OutContext),
965 Expr = MCBinaryExpr::CreateDiv(Expr, MCConstantExpr::Create(2, OutContext),
967 OutStreamer.EmitValue(Expr, OffsetWidth);
969 // Mark the end of jump table data-in-code region. 32-bit offsets use
970 // actual branch instructions here, so we don't mark those as a data-region
972 if (OffsetWidth != 4)
973 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
976 void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) {
977 assert(MI->getFlag(MachineInstr::FrameSetup) &&
978 "Only instruction which are involved into frame setup code are allowed");
980 MCTargetStreamer &TS = OutStreamer.getTargetStreamer();
981 ARMTargetStreamer &ATS = static_cast<ARMTargetStreamer &>(TS);
982 const MachineFunction &MF = *MI->getParent()->getParent();
983 const TargetRegisterInfo *RegInfo = MF.getTarget().getRegisterInfo();
984 const ARMFunctionInfo &AFI = *MF.getInfo<ARMFunctionInfo>();
986 unsigned FramePtr = RegInfo->getFrameRegister(MF);
987 unsigned Opc = MI->getOpcode();
988 unsigned SrcReg, DstReg;
990 if (Opc == ARM::tPUSH || Opc == ARM::tLDRpci) {
991 // Two special cases:
992 // 1) tPUSH does not have src/dst regs.
993 // 2) for Thumb1 code we sometimes materialize the constant via constpool
994 // load. Yes, this is pretty fragile, but for now I don't see better
996 SrcReg = DstReg = ARM::SP;
998 SrcReg = MI->getOperand(1).getReg();
999 DstReg = MI->getOperand(0).getReg();
1002 // Try to figure out the unwinding opcode out of src / dst regs.
1003 if (MI->mayStore()) {
1005 assert(DstReg == ARM::SP &&
1006 "Only stack pointer as a destination reg is supported");
1008 SmallVector<unsigned, 4> RegList;
1009 // Skip src & dst reg, and pred ops.
1010 unsigned StartOp = 2 + 2;
1011 // Use all the operands.
1012 unsigned NumOffset = 0;
1017 llvm_unreachable("Unsupported opcode for unwinding information");
1019 // Special case here: no src & dst reg, but two extra imp ops.
1020 StartOp = 2; NumOffset = 2;
1021 case ARM::STMDB_UPD:
1022 case ARM::t2STMDB_UPD:
1023 case ARM::VSTMDDB_UPD:
1024 assert(SrcReg == ARM::SP &&
1025 "Only stack pointer as a source reg is supported");
1026 for (unsigned i = StartOp, NumOps = MI->getNumOperands() - NumOffset;
1028 const MachineOperand &MO = MI->getOperand(i);
1029 // Actually, there should never be any impdef stuff here. Skip it
1030 // temporary to workaround PR11902.
1031 if (MO.isImplicit())
1033 RegList.push_back(MO.getReg());
1036 case ARM::STR_PRE_IMM:
1037 case ARM::STR_PRE_REG:
1038 case ARM::t2STR_PRE:
1039 assert(MI->getOperand(2).getReg() == ARM::SP &&
1040 "Only stack pointer as a source reg is supported");
1041 RegList.push_back(SrcReg);
1044 ATS.emitRegSave(RegList, Opc == ARM::VSTMDDB_UPD);
1046 // Changes of stack / frame pointer.
1047 if (SrcReg == ARM::SP) {
1052 llvm_unreachable("Unsupported opcode for unwinding information");
1058 Offset = -MI->getOperand(2).getImm();
1062 Offset = MI->getOperand(2).getImm();
1065 Offset = MI->getOperand(2).getImm()*4;
1069 Offset = -MI->getOperand(2).getImm()*4;
1071 case ARM::tLDRpci: {
1072 // Grab the constpool index and check, whether it corresponds to
1073 // original or cloned constpool entry.
1074 unsigned CPI = MI->getOperand(1).getIndex();
1075 const MachineConstantPool *MCP = MF.getConstantPool();
1076 if (CPI >= MCP->getConstants().size())
1077 CPI = AFI.getOriginalCPIdx(CPI);
1078 assert(CPI != -1U && "Invalid constpool index");
1080 // Derive the actual offset.
1081 const MachineConstantPoolEntry &CPE = MCP->getConstants()[CPI];
1082 assert(!CPE.isMachineConstantPoolEntry() && "Invalid constpool entry");
1083 // FIXME: Check for user, it should be "add" instruction!
1084 Offset = -cast<ConstantInt>(CPE.Val.ConstVal)->getSExtValue();
1089 if (DstReg == FramePtr && FramePtr != ARM::SP)
1090 // Set-up of the frame pointer. Positive values correspond to "add"
1092 ATS.emitSetFP(FramePtr, ARM::SP, -Offset);
1093 else if (DstReg == ARM::SP) {
1094 // Change of SP by an offset. Positive values correspond to "sub"
1096 ATS.emitPad(Offset);
1099 llvm_unreachable("Unsupported opcode for unwinding information");
1101 } else if (DstReg == ARM::SP) {
1102 // FIXME: .movsp goes here
1104 llvm_unreachable("Unsupported opcode for unwinding information");
1108 llvm_unreachable("Unsupported opcode for unwinding information");
1113 extern cl::opt<bool> EnableARMEHABI;
1115 // Simple pseudo-instructions have their lowering (with expansion to real
1116 // instructions) auto-generated.
1117 #include "ARMGenMCPseudoLowering.inc"
1119 void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
1120 // If we just ended a constant pool, mark it as such.
1121 if (InConstantPool && MI->getOpcode() != ARM::CONSTPOOL_ENTRY) {
1122 OutStreamer.EmitDataRegion(MCDR_DataRegionEnd);
1123 InConstantPool = false;
1126 // Emit unwinding stuff for frame-related instructions
1127 if (EnableARMEHABI && MI->getFlag(MachineInstr::FrameSetup))
1128 EmitUnwindingInstruction(MI);
1130 // Do any auto-generated pseudo lowerings.
1131 if (emitPseudoExpansionLowering(OutStreamer, MI))
1134 assert(!convertAddSubFlagsOpcode(MI->getOpcode()) &&
1135 "Pseudo flag setting opcode should be expanded early");
1137 // Check for manual lowerings.
1138 unsigned Opc = MI->getOpcode();
1140 case ARM::t2MOVi32imm: llvm_unreachable("Should be lowered by thumb2it pass");
1141 case ARM::DBG_VALUE: llvm_unreachable("Should be handled by generic printing");
1143 case ARM::tLEApcrel:
1144 case ARM::t2LEApcrel: {
1145 // FIXME: Need to also handle globals and externals
1146 MCSymbol *CPISymbol = GetCPISymbol(MI->getOperand(1).getIndex());
1147 OutStreamer.EmitInstruction(MCInstBuilder(MI->getOpcode() ==
1148 ARM::t2LEApcrel ? ARM::t2ADR
1149 : (MI->getOpcode() == ARM::tLEApcrel ? ARM::tADR
1151 .addReg(MI->getOperand(0).getReg())
1152 .addExpr(MCSymbolRefExpr::Create(CPISymbol, OutContext))
1153 // Add predicate operands.
1154 .addImm(MI->getOperand(2).getImm())
1155 .addReg(MI->getOperand(3).getReg()));
1158 case ARM::LEApcrelJT:
1159 case ARM::tLEApcrelJT:
1160 case ARM::t2LEApcrelJT: {
1161 MCSymbol *JTIPICSymbol =
1162 GetARMJTIPICJumpTableLabel2(MI->getOperand(1).getIndex(),
1163 MI->getOperand(2).getImm());
1164 OutStreamer.EmitInstruction(MCInstBuilder(MI->getOpcode() ==
1165 ARM::t2LEApcrelJT ? ARM::t2ADR
1166 : (MI->getOpcode() == ARM::tLEApcrelJT ? ARM::tADR
1168 .addReg(MI->getOperand(0).getReg())
1169 .addExpr(MCSymbolRefExpr::Create(JTIPICSymbol, OutContext))
1170 // Add predicate operands.
1171 .addImm(MI->getOperand(3).getImm())
1172 .addReg(MI->getOperand(4).getReg()));
1175 // Darwin call instructions are just normal call instructions with different
1176 // clobber semantics (they clobber R9).
1177 case ARM::BX_CALL: {
1178 OutStreamer.EmitInstruction(MCInstBuilder(ARM::MOVr)
1181 // Add predicate operands.
1184 // Add 's' bit operand (always reg0 for this)
1187 OutStreamer.EmitInstruction(MCInstBuilder(ARM::BX)
1188 .addReg(MI->getOperand(0).getReg()));
1191 case ARM::tBX_CALL: {
1192 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tMOVr)
1195 // Add predicate operands.
1199 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tBX)
1200 .addReg(MI->getOperand(0).getReg())
1201 // Add predicate operands.
1206 case ARM::BMOVPCRX_CALL: {
1207 OutStreamer.EmitInstruction(MCInstBuilder(ARM::MOVr)
1210 // Add predicate operands.
1213 // Add 's' bit operand (always reg0 for this)
1216 OutStreamer.EmitInstruction(MCInstBuilder(ARM::MOVr)
1218 .addReg(MI->getOperand(0).getReg())
1219 // Add predicate operands.
1222 // Add 's' bit operand (always reg0 for this)
1226 case ARM::BMOVPCB_CALL: {
1227 OutStreamer.EmitInstruction(MCInstBuilder(ARM::MOVr)
1230 // Add predicate operands.
1233 // Add 's' bit operand (always reg0 for this)
1236 const GlobalValue *GV = MI->getOperand(0).getGlobal();
1237 MCSymbol *GVSym = getSymbol(GV);
1238 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1239 OutStreamer.EmitInstruction(MCInstBuilder(ARM::Bcc)
1241 // Add predicate operands.
1246 case ARM::MOVi16_ga_pcrel:
1247 case ARM::t2MOVi16_ga_pcrel: {
1249 TmpInst.setOpcode(Opc == ARM::MOVi16_ga_pcrel? ARM::MOVi16 : ARM::t2MOVi16);
1250 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1252 unsigned TF = MI->getOperand(1).getTargetFlags();
1253 const GlobalValue *GV = MI->getOperand(1).getGlobal();
1254 MCSymbol *GVSym = GetARMGVSymbol(GV, TF);
1255 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1257 MCSymbol *LabelSym = getPICLabel(MAI->getPrivateGlobalPrefix(),
1258 getFunctionNumber(),
1259 MI->getOperand(2).getImm(), OutContext);
1260 const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
1261 unsigned PCAdj = (Opc == ARM::MOVi16_ga_pcrel) ? 8 : 4;
1262 const MCExpr *PCRelExpr =
1263 ARMMCExpr::CreateLower16(MCBinaryExpr::CreateSub(GVSymExpr,
1264 MCBinaryExpr::CreateAdd(LabelSymExpr,
1265 MCConstantExpr::Create(PCAdj, OutContext),
1266 OutContext), OutContext), OutContext);
1267 TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
1269 // Add predicate operands.
1270 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1271 TmpInst.addOperand(MCOperand::CreateReg(0));
1272 // Add 's' bit operand (always reg0 for this)
1273 TmpInst.addOperand(MCOperand::CreateReg(0));
1274 OutStreamer.EmitInstruction(TmpInst);
1277 case ARM::MOVTi16_ga_pcrel:
1278 case ARM::t2MOVTi16_ga_pcrel: {
1280 TmpInst.setOpcode(Opc == ARM::MOVTi16_ga_pcrel
1281 ? ARM::MOVTi16 : ARM::t2MOVTi16);
1282 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1283 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1285 unsigned TF = MI->getOperand(2).getTargetFlags();
1286 const GlobalValue *GV = MI->getOperand(2).getGlobal();
1287 MCSymbol *GVSym = GetARMGVSymbol(GV, TF);
1288 const MCExpr *GVSymExpr = MCSymbolRefExpr::Create(GVSym, OutContext);
1290 MCSymbol *LabelSym = getPICLabel(MAI->getPrivateGlobalPrefix(),
1291 getFunctionNumber(),
1292 MI->getOperand(3).getImm(), OutContext);
1293 const MCExpr *LabelSymExpr= MCSymbolRefExpr::Create(LabelSym, OutContext);
1294 unsigned PCAdj = (Opc == ARM::MOVTi16_ga_pcrel) ? 8 : 4;
1295 const MCExpr *PCRelExpr =
1296 ARMMCExpr::CreateUpper16(MCBinaryExpr::CreateSub(GVSymExpr,
1297 MCBinaryExpr::CreateAdd(LabelSymExpr,
1298 MCConstantExpr::Create(PCAdj, OutContext),
1299 OutContext), OutContext), OutContext);
1300 TmpInst.addOperand(MCOperand::CreateExpr(PCRelExpr));
1301 // Add predicate operands.
1302 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1303 TmpInst.addOperand(MCOperand::CreateReg(0));
1304 // Add 's' bit operand (always reg0 for this)
1305 TmpInst.addOperand(MCOperand::CreateReg(0));
1306 OutStreamer.EmitInstruction(TmpInst);
1309 case ARM::tPICADD: {
1310 // This is a pseudo op for a label + instruction sequence, which looks like:
1313 // This adds the address of LPC0 to r0.
1316 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1317 getFunctionNumber(), MI->getOperand(2).getImm(),
1320 // Form and emit the add.
1321 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tADDhirr)
1322 .addReg(MI->getOperand(0).getReg())
1323 .addReg(MI->getOperand(0).getReg())
1325 // Add predicate operands.
1331 // This is a pseudo op for a label + instruction sequence, which looks like:
1334 // This adds the address of LPC0 to r0.
1337 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1338 getFunctionNumber(), MI->getOperand(2).getImm(),
1341 // Form and emit the add.
1342 OutStreamer.EmitInstruction(MCInstBuilder(ARM::ADDrr)
1343 .addReg(MI->getOperand(0).getReg())
1345 .addReg(MI->getOperand(1).getReg())
1346 // Add predicate operands.
1347 .addImm(MI->getOperand(3).getImm())
1348 .addReg(MI->getOperand(4).getReg())
1349 // Add 's' bit operand (always reg0 for this)
1360 case ARM::PICLDRSH: {
1361 // This is a pseudo op for a label + instruction sequence, which looks like:
1364 // The LCP0 label is referenced by a constant pool entry in order to get
1365 // a PC-relative address at the ldr instruction.
1368 OutStreamer.EmitLabel(getPICLabel(MAI->getPrivateGlobalPrefix(),
1369 getFunctionNumber(), MI->getOperand(2).getImm(),
1372 // Form and emit the load
1374 switch (MI->getOpcode()) {
1376 llvm_unreachable("Unexpected opcode!");
1377 case ARM::PICSTR: Opcode = ARM::STRrs; break;
1378 case ARM::PICSTRB: Opcode = ARM::STRBrs; break;
1379 case ARM::PICSTRH: Opcode = ARM::STRH; break;
1380 case ARM::PICLDR: Opcode = ARM::LDRrs; break;
1381 case ARM::PICLDRB: Opcode = ARM::LDRBrs; break;
1382 case ARM::PICLDRH: Opcode = ARM::LDRH; break;
1383 case ARM::PICLDRSB: Opcode = ARM::LDRSB; break;
1384 case ARM::PICLDRSH: Opcode = ARM::LDRSH; break;
1386 OutStreamer.EmitInstruction(MCInstBuilder(Opcode)
1387 .addReg(MI->getOperand(0).getReg())
1389 .addReg(MI->getOperand(1).getReg())
1391 // Add predicate operands.
1392 .addImm(MI->getOperand(3).getImm())
1393 .addReg(MI->getOperand(4).getReg()));
1397 case ARM::CONSTPOOL_ENTRY: {
1398 /// CONSTPOOL_ENTRY - This instruction represents a floating constant pool
1399 /// in the function. The first operand is the ID# for this instruction, the
1400 /// second is the index into the MachineConstantPool that this is, the third
1401 /// is the size in bytes of this constant pool entry.
1402 /// The required alignment is specified on the basic block holding this MI.
1403 unsigned LabelId = (unsigned)MI->getOperand(0).getImm();
1404 unsigned CPIdx = (unsigned)MI->getOperand(1).getIndex();
1406 // If this is the first entry of the pool, mark it.
1407 if (!InConstantPool) {
1408 OutStreamer.EmitDataRegion(MCDR_DataRegion);
1409 InConstantPool = true;
1412 OutStreamer.EmitLabel(GetCPISymbol(LabelId));
1414 const MachineConstantPoolEntry &MCPE = MCP->getConstants()[CPIdx];
1415 if (MCPE.isMachineConstantPoolEntry())
1416 EmitMachineConstantPoolValue(MCPE.Val.MachineCPVal);
1418 EmitGlobalConstant(MCPE.Val.ConstVal);
1421 case ARM::t2BR_JT: {
1422 // Lower and emit the instruction itself, then the jump table following it.
1423 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tMOVr)
1425 .addReg(MI->getOperand(0).getReg())
1426 // Add predicate operands.
1430 // Output the data for the jump table itself
1434 case ARM::t2TBB_JT: {
1435 // Lower and emit the instruction itself, then the jump table following it.
1436 OutStreamer.EmitInstruction(MCInstBuilder(ARM::t2TBB)
1438 .addReg(MI->getOperand(0).getReg())
1439 // Add predicate operands.
1443 // Output the data for the jump table itself
1445 // Make sure the next instruction is 2-byte aligned.
1449 case ARM::t2TBH_JT: {
1450 // Lower and emit the instruction itself, then the jump table following it.
1451 OutStreamer.EmitInstruction(MCInstBuilder(ARM::t2TBH)
1453 .addReg(MI->getOperand(0).getReg())
1454 // Add predicate operands.
1458 // Output the data for the jump table itself
1464 // Lower and emit the instruction itself, then the jump table following it.
1467 unsigned Opc = MI->getOpcode() == ARM::BR_JTr ?
1468 ARM::MOVr : ARM::tMOVr;
1469 TmpInst.setOpcode(Opc);
1470 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1471 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1472 // Add predicate operands.
1473 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1474 TmpInst.addOperand(MCOperand::CreateReg(0));
1475 // Add 's' bit operand (always reg0 for this)
1476 if (Opc == ARM::MOVr)
1477 TmpInst.addOperand(MCOperand::CreateReg(0));
1478 OutStreamer.EmitInstruction(TmpInst);
1480 // Make sure the Thumb jump table is 4-byte aligned.
1481 if (Opc == ARM::tMOVr)
1484 // Output the data for the jump table itself
1489 // Lower and emit the instruction itself, then the jump table following it.
1492 if (MI->getOperand(1).getReg() == 0) {
1494 TmpInst.setOpcode(ARM::LDRi12);
1495 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1496 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1497 TmpInst.addOperand(MCOperand::CreateImm(MI->getOperand(2).getImm()));
1499 TmpInst.setOpcode(ARM::LDRrs);
1500 TmpInst.addOperand(MCOperand::CreateReg(ARM::PC));
1501 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
1502 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
1503 TmpInst.addOperand(MCOperand::CreateImm(0));
1505 // Add predicate operands.
1506 TmpInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
1507 TmpInst.addOperand(MCOperand::CreateReg(0));
1508 OutStreamer.EmitInstruction(TmpInst);
1510 // Output the data for the jump table itself
1514 case ARM::BR_JTadd: {
1515 // Lower and emit the instruction itself, then the jump table following it.
1516 // add pc, target, idx
1517 OutStreamer.EmitInstruction(MCInstBuilder(ARM::ADDrr)
1519 .addReg(MI->getOperand(0).getReg())
1520 .addReg(MI->getOperand(1).getReg())
1521 // Add predicate operands.
1524 // Add 's' bit operand (always reg0 for this)
1527 // Output the data for the jump table itself
1532 // Non-Darwin binutils don't yet support the "trap" mnemonic.
1533 // FIXME: Remove this special case when they do.
1534 if (!Subtarget->isTargetDarwin()) {
1535 //.long 0xe7ffdefe @ trap
1536 uint32_t Val = 0xe7ffdefeUL;
1537 OutStreamer.AddComment("trap");
1538 OutStreamer.EmitIntValue(Val, 4);
1543 case ARM::TRAPNaCl: {
1544 //.long 0xe7fedef0 @ trap
1545 uint32_t Val = 0xe7fedef0UL;
1546 OutStreamer.AddComment("trap");
1547 OutStreamer.EmitIntValue(Val, 4);
1551 // Non-Darwin binutils don't yet support the "trap" mnemonic.
1552 // FIXME: Remove this special case when they do.
1553 if (!Subtarget->isTargetDarwin()) {
1554 //.short 57086 @ trap
1555 uint16_t Val = 0xdefe;
1556 OutStreamer.AddComment("trap");
1557 OutStreamer.EmitIntValue(Val, 2);
1562 case ARM::t2Int_eh_sjlj_setjmp:
1563 case ARM::t2Int_eh_sjlj_setjmp_nofp:
1564 case ARM::tInt_eh_sjlj_setjmp: {
1565 // Two incoming args: GPR:$src, GPR:$val
1568 // str $val, [$src, #4]
1573 unsigned SrcReg = MI->getOperand(0).getReg();
1574 unsigned ValReg = MI->getOperand(1).getReg();
1575 MCSymbol *Label = GetARMSJLJEHLabel();
1576 OutStreamer.AddComment("eh_setjmp begin");
1577 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tMOVr)
1584 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tADDi3)
1594 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tSTRi)
1597 // The offset immediate is #4. The operand value is scaled by 4 for the
1598 // tSTR instruction.
1604 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tMOVi8)
1612 const MCExpr *SymbolExpr = MCSymbolRefExpr::Create(Label, OutContext);
1613 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tB)
1614 .addExpr(SymbolExpr)
1618 OutStreamer.AddComment("eh_setjmp end");
1619 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tMOVi8)
1627 OutStreamer.EmitLabel(Label);
1631 case ARM::Int_eh_sjlj_setjmp_nofp:
1632 case ARM::Int_eh_sjlj_setjmp: {
1633 // Two incoming args: GPR:$src, GPR:$val
1635 // str $val, [$src, #+4]
1639 unsigned SrcReg = MI->getOperand(0).getReg();
1640 unsigned ValReg = MI->getOperand(1).getReg();
1642 OutStreamer.AddComment("eh_setjmp begin");
1643 OutStreamer.EmitInstruction(MCInstBuilder(ARM::ADDri)
1650 // 's' bit operand (always reg0 for this).
1653 OutStreamer.EmitInstruction(MCInstBuilder(ARM::STRi12)
1661 OutStreamer.EmitInstruction(MCInstBuilder(ARM::MOVi)
1667 // 's' bit operand (always reg0 for this).
1670 OutStreamer.EmitInstruction(MCInstBuilder(ARM::ADDri)
1677 // 's' bit operand (always reg0 for this).
1680 OutStreamer.AddComment("eh_setjmp end");
1681 OutStreamer.EmitInstruction(MCInstBuilder(ARM::MOVi)
1687 // 's' bit operand (always reg0 for this).
1691 case ARM::Int_eh_sjlj_longjmp: {
1692 // ldr sp, [$src, #8]
1693 // ldr $scratch, [$src, #4]
1696 unsigned SrcReg = MI->getOperand(0).getReg();
1697 unsigned ScratchReg = MI->getOperand(1).getReg();
1698 OutStreamer.EmitInstruction(MCInstBuilder(ARM::LDRi12)
1706 OutStreamer.EmitInstruction(MCInstBuilder(ARM::LDRi12)
1714 OutStreamer.EmitInstruction(MCInstBuilder(ARM::LDRi12)
1722 OutStreamer.EmitInstruction(MCInstBuilder(ARM::BX)
1729 case ARM::tInt_eh_sjlj_longjmp: {
1730 // ldr $scratch, [$src, #8]
1732 // ldr $scratch, [$src, #4]
1735 unsigned SrcReg = MI->getOperand(0).getReg();
1736 unsigned ScratchReg = MI->getOperand(1).getReg();
1737 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tLDRi)
1740 // The offset immediate is #8. The operand value is scaled by 4 for the
1741 // tLDR instruction.
1747 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tMOVr)
1754 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tLDRi)
1762 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tLDRi)
1770 OutStreamer.EmitInstruction(MCInstBuilder(ARM::tBX)
1780 LowerARMMachineInstrToMCInst(MI, TmpInst, *this);
1782 OutStreamer.EmitInstruction(TmpInst);
1785 //===----------------------------------------------------------------------===//
1786 // Target Registry Stuff
1787 //===----------------------------------------------------------------------===//
1789 // Force static initialization.
1790 extern "C" void LLVMInitializeARMAsmPrinter() {
1791 RegisterAsmPrinter<ARMAsmPrinter> X(TheARMTarget);
1792 RegisterAsmPrinter<ARMAsmPrinter> Y(TheThumbTarget);