1 //===-- SparcAsmPrinter.cpp - Sparc 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 GAS-format SPARC assembly language.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "asm-printer"
17 #include "InstPrinter/SparcInstPrinter.h"
18 #include "MCTargetDesc/SparcMCExpr.h"
19 #include "SparcInstrInfo.h"
20 #include "SparcTargetMachine.h"
21 #include "SparcTargetStreamer.h"
22 #include "llvm/ADT/SmallString.h"
23 #include "llvm/CodeGen/AsmPrinter.h"
24 #include "llvm/CodeGen/MachineInstr.h"
25 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
26 #include "llvm/CodeGen/MachineRegisterInfo.h"
27 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
28 #include "llvm/IR/Mangler.h"
29 #include "llvm/MC/MCAsmInfo.h"
30 #include "llvm/MC/MCContext.h"
31 #include "llvm/MC/MCInst.h"
32 #include "llvm/MC/MCStreamer.h"
33 #include "llvm/MC/MCSymbol.h"
34 #include "llvm/Support/TargetRegistry.h"
35 #include "llvm/Support/raw_ostream.h"
39 class SparcAsmPrinter : public AsmPrinter {
40 SparcTargetStreamer &getTargetStreamer() {
41 return static_cast<SparcTargetStreamer &>(
42 *OutStreamer.getTargetStreamer());
45 explicit SparcAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
46 : AsmPrinter(TM, Streamer) {}
48 virtual const char *getPassName() const {
49 return "Sparc Assembly Printer";
52 void printOperand(const MachineInstr *MI, int opNum, raw_ostream &OS);
53 void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &OS,
54 const char *Modifier = 0);
55 void printCCOperand(const MachineInstr *MI, int opNum, raw_ostream &OS);
57 virtual void EmitFunctionBodyStart();
58 virtual void EmitInstruction(const MachineInstr *MI);
59 virtual void EmitEndOfAsmFile(Module &M);
61 static const char *getRegisterName(unsigned RegNo) {
62 return SparcInstPrinter::getRegisterName(RegNo);
65 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
66 unsigned AsmVariant, const char *ExtraCode,
68 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
69 unsigned AsmVariant, const char *ExtraCode,
72 void LowerGETPCXAndEmitMCInsts(const MachineInstr *MI,
73 const MCSubtargetInfo &STI);
76 } // end of anonymous namespace
78 static MCOperand createSparcMCOperand(SparcMCExpr::VariantKind Kind,
79 MCSymbol *Sym, MCContext &OutContext) {
80 const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::Create(Sym,
82 const SparcMCExpr *expr = SparcMCExpr::Create(Kind, MCSym, OutContext);
83 return MCOperand::CreateExpr(expr);
86 static MCOperand createPCXCallOP(MCSymbol *Label,
87 MCContext &OutContext) {
88 return createSparcMCOperand(SparcMCExpr::VK_Sparc_None, Label, OutContext);
91 static MCOperand createPCXRelExprOp(SparcMCExpr::VariantKind Kind,
92 MCSymbol *GOTLabel, MCSymbol *StartLabel,
94 MCContext &OutContext)
96 const MCSymbolRefExpr *GOT = MCSymbolRefExpr::Create(GOTLabel, OutContext);
97 const MCSymbolRefExpr *Start = MCSymbolRefExpr::Create(StartLabel,
99 const MCSymbolRefExpr *Cur = MCSymbolRefExpr::Create(CurLabel,
102 const MCBinaryExpr *Sub = MCBinaryExpr::CreateSub(Cur, Start, OutContext);
103 const MCBinaryExpr *Add = MCBinaryExpr::CreateAdd(GOT, Sub, OutContext);
104 const SparcMCExpr *expr = SparcMCExpr::Create(Kind,
106 return MCOperand::CreateExpr(expr);
109 static void EmitCall(MCStreamer &OutStreamer,
111 const MCSubtargetInfo &STI)
114 CallInst.setOpcode(SP::CALL);
115 CallInst.addOperand(Callee);
116 OutStreamer.EmitInstruction(CallInst, STI);
119 static void EmitSETHI(MCStreamer &OutStreamer,
120 MCOperand &Imm, MCOperand &RD,
121 const MCSubtargetInfo &STI)
124 SETHIInst.setOpcode(SP::SETHIi);
125 SETHIInst.addOperand(RD);
126 SETHIInst.addOperand(Imm);
127 OutStreamer.EmitInstruction(SETHIInst, STI);
130 static void EmitBinary(MCStreamer &OutStreamer, unsigned Opcode,
131 MCOperand &RS1, MCOperand &Src2, MCOperand &RD,
132 const MCSubtargetInfo &STI)
135 Inst.setOpcode(Opcode);
137 Inst.addOperand(RS1);
138 Inst.addOperand(Src2);
139 OutStreamer.EmitInstruction(Inst, STI);
142 static void EmitOR(MCStreamer &OutStreamer,
143 MCOperand &RS1, MCOperand &Imm, MCOperand &RD,
144 const MCSubtargetInfo &STI) {
145 EmitBinary(OutStreamer, SP::ORri, RS1, Imm, RD, STI);
148 static void EmitADD(MCStreamer &OutStreamer,
149 MCOperand &RS1, MCOperand &RS2, MCOperand &RD,
150 const MCSubtargetInfo &STI) {
151 EmitBinary(OutStreamer, SP::ADDrr, RS1, RS2, RD, STI);
154 static void EmitSHL(MCStreamer &OutStreamer,
155 MCOperand &RS1, MCOperand &Imm, MCOperand &RD,
156 const MCSubtargetInfo &STI) {
157 EmitBinary(OutStreamer, SP::SLLri, RS1, Imm, RD, STI);
161 static void EmitHiLo(MCStreamer &OutStreamer, MCSymbol *GOTSym,
162 SparcMCExpr::VariantKind HiKind,
163 SparcMCExpr::VariantKind LoKind,
165 MCContext &OutContext,
166 const MCSubtargetInfo &STI) {
168 MCOperand hi = createSparcMCOperand(HiKind, GOTSym, OutContext);
169 MCOperand lo = createSparcMCOperand(LoKind, GOTSym, OutContext);
170 EmitSETHI(OutStreamer, hi, RD, STI);
171 EmitOR(OutStreamer, RD, lo, RD, STI);
174 void SparcAsmPrinter::LowerGETPCXAndEmitMCInsts(const MachineInstr *MI,
175 const MCSubtargetInfo &STI)
178 OutContext.GetOrCreateSymbol(Twine("_GLOBAL_OFFSET_TABLE_"));
180 const MachineOperand &MO = MI->getOperand(0);
181 assert(MO.getReg() != SP::O7 &&
182 "%o7 is assigned as destination for getpcx!");
184 MCOperand MCRegOP = MCOperand::CreateReg(MO.getReg());
187 if (TM.getRelocationModel() != Reloc::PIC_) {
188 // Just load the address of GOT to MCRegOP.
189 switch(TM.getCodeModel()) {
191 llvm_unreachable("Unsupported absolute code model");
192 case CodeModel::Small:
193 EmitHiLo(OutStreamer, GOTLabel,
194 SparcMCExpr::VK_Sparc_HI, SparcMCExpr::VK_Sparc_LO,
195 MCRegOP, OutContext, STI);
197 case CodeModel::Medium: {
198 EmitHiLo(OutStreamer, GOTLabel,
199 SparcMCExpr::VK_Sparc_H44, SparcMCExpr::VK_Sparc_M44,
200 MCRegOP, OutContext, STI);
201 MCOperand imm = MCOperand::CreateExpr(MCConstantExpr::Create(12,
203 EmitSHL(OutStreamer, MCRegOP, imm, MCRegOP, STI);
204 MCOperand lo = createSparcMCOperand(SparcMCExpr::VK_Sparc_L44,
205 GOTLabel, OutContext);
206 EmitOR(OutStreamer, MCRegOP, lo, MCRegOP, STI);
209 case CodeModel::Large: {
210 EmitHiLo(OutStreamer, GOTLabel,
211 SparcMCExpr::VK_Sparc_HH, SparcMCExpr::VK_Sparc_HM,
212 MCRegOP, OutContext, STI);
213 MCOperand imm = MCOperand::CreateExpr(MCConstantExpr::Create(32,
215 EmitSHL(OutStreamer, MCRegOP, imm, MCRegOP, STI);
216 // Use register %o7 to load the lower 32 bits.
217 MCOperand RegO7 = MCOperand::CreateReg(SP::O7);
218 EmitHiLo(OutStreamer, GOTLabel,
219 SparcMCExpr::VK_Sparc_HI, SparcMCExpr::VK_Sparc_LO,
220 RegO7, OutContext, STI);
221 EmitADD(OutStreamer, MCRegOP, RegO7, MCRegOP, STI);
227 MCSymbol *StartLabel = OutContext.CreateTempSymbol();
228 MCSymbol *EndLabel = OutContext.CreateTempSymbol();
229 MCSymbol *SethiLabel = OutContext.CreateTempSymbol();
231 MCOperand RegO7 = MCOperand::CreateReg(SP::O7);
236 // sethi %hi(_GLOBAL_OFFSET_TABLE_+(<SethiLabel>-<StartLabel>)), <MO>
238 // or <MO>, %lo(_GLOBAL_OFFSET_TABLE_+(<EndLabel>-<StartLabel>))), <MO>
239 // add <MO>, %o7, <MO>
241 OutStreamer.EmitLabel(StartLabel);
242 MCOperand Callee = createPCXCallOP(EndLabel, OutContext);
243 EmitCall(OutStreamer, Callee, STI);
244 OutStreamer.EmitLabel(SethiLabel);
245 MCOperand hiImm = createPCXRelExprOp(SparcMCExpr::VK_Sparc_HI,
246 GOTLabel, StartLabel, SethiLabel,
248 EmitSETHI(OutStreamer, hiImm, MCRegOP, STI);
249 OutStreamer.EmitLabel(EndLabel);
250 MCOperand loImm = createPCXRelExprOp(SparcMCExpr::VK_Sparc_LO,
251 GOTLabel, StartLabel, EndLabel,
253 EmitOR(OutStreamer, MCRegOP, loImm, MCRegOP, STI);
254 EmitADD(OutStreamer, MCRegOP, RegO7, MCRegOP, STI);
257 void SparcAsmPrinter::EmitInstruction(const MachineInstr *MI)
260 switch (MI->getOpcode()) {
262 case TargetOpcode::DBG_VALUE:
263 // FIXME: Debug Value.
266 LowerGETPCXAndEmitMCInsts(MI, getSubtargetInfo());
269 MachineBasicBlock::const_instr_iterator I = MI;
270 MachineBasicBlock::const_instr_iterator E = MI->getParent()->instr_end();
273 LowerSparcMachineInstrToMCInst(I, TmpInst, *this);
274 EmitToStreamer(OutStreamer, TmpInst);
275 } while ((++I != E) && I->isInsideBundle()); // Delay slot check.
278 void SparcAsmPrinter::EmitFunctionBodyStart() {
279 if (!TM.getSubtarget<SparcSubtarget>().is64Bit())
282 const MachineRegisterInfo &MRI = MF->getRegInfo();
283 const unsigned globalRegs[] = { SP::G2, SP::G3, SP::G6, SP::G7, 0 };
284 for (unsigned i = 0; globalRegs[i] != 0; ++i) {
285 unsigned reg = globalRegs[i];
286 if (MRI.use_empty(reg))
289 if (reg == SP::G6 || reg == SP::G7)
290 getTargetStreamer().emitSparcRegisterIgnore(reg);
292 getTargetStreamer().emitSparcRegisterScratch(reg);
296 void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
298 const DataLayout *DL = TM.getDataLayout();
299 const MachineOperand &MO = MI->getOperand (opNum);
300 SparcMCExpr::VariantKind TF = (SparcMCExpr::VariantKind) MO.getTargetFlags();
303 // Verify the target flags.
304 if (MO.isGlobal() || MO.isSymbol() || MO.isCPI()) {
305 if (MI->getOpcode() == SP::CALL)
306 assert(TF == SparcMCExpr::VK_Sparc_None &&
307 "Cannot handle target flags on call address");
308 else if (MI->getOpcode() == SP::SETHIi || MI->getOpcode() == SP::SETHIXi)
309 assert((TF == SparcMCExpr::VK_Sparc_HI
310 || TF == SparcMCExpr::VK_Sparc_H44
311 || TF == SparcMCExpr::VK_Sparc_HH
312 || TF == SparcMCExpr::VK_Sparc_TLS_GD_HI22
313 || TF == SparcMCExpr::VK_Sparc_TLS_LDM_HI22
314 || TF == SparcMCExpr::VK_Sparc_TLS_LDO_HIX22
315 || TF == SparcMCExpr::VK_Sparc_TLS_IE_HI22
316 || TF == SparcMCExpr::VK_Sparc_TLS_LE_HIX22) &&
317 "Invalid target flags for address operand on sethi");
318 else if (MI->getOpcode() == SP::TLS_CALL)
319 assert((TF == SparcMCExpr::VK_Sparc_None
320 || TF == SparcMCExpr::VK_Sparc_TLS_GD_CALL
321 || TF == SparcMCExpr::VK_Sparc_TLS_LDM_CALL) &&
322 "Cannot handle target flags on tls call address");
323 else if (MI->getOpcode() == SP::TLS_ADDrr)
324 assert((TF == SparcMCExpr::VK_Sparc_TLS_GD_ADD
325 || TF == SparcMCExpr::VK_Sparc_TLS_LDM_ADD
326 || TF == SparcMCExpr::VK_Sparc_TLS_LDO_ADD
327 || TF == SparcMCExpr::VK_Sparc_TLS_IE_ADD) &&
328 "Cannot handle target flags on add for TLS");
329 else if (MI->getOpcode() == SP::TLS_LDrr)
330 assert(TF == SparcMCExpr::VK_Sparc_TLS_IE_LD &&
331 "Cannot handle target flags on ld for TLS");
332 else if (MI->getOpcode() == SP::TLS_LDXrr)
333 assert(TF == SparcMCExpr::VK_Sparc_TLS_IE_LDX &&
334 "Cannot handle target flags on ldx for TLS");
335 else if (MI->getOpcode() == SP::XORri || MI->getOpcode() == SP::XORXri)
336 assert((TF == SparcMCExpr::VK_Sparc_TLS_LDO_LOX10
337 || TF == SparcMCExpr::VK_Sparc_TLS_LE_LOX10) &&
338 "Cannot handle target flags on xor for TLS");
340 assert((TF == SparcMCExpr::VK_Sparc_LO
341 || TF == SparcMCExpr::VK_Sparc_M44
342 || TF == SparcMCExpr::VK_Sparc_L44
343 || TF == SparcMCExpr::VK_Sparc_HM
344 || TF == SparcMCExpr::VK_Sparc_TLS_GD_LO10
345 || TF == SparcMCExpr::VK_Sparc_TLS_LDM_LO10
346 || TF == SparcMCExpr::VK_Sparc_TLS_IE_LO10 ) &&
347 "Invalid target flags for small address operand");
352 bool CloseParen = SparcMCExpr::printVariantKind(O, TF);
354 switch (MO.getType()) {
355 case MachineOperand::MO_Register:
356 O << "%" << StringRef(getRegisterName(MO.getReg())).lower();
359 case MachineOperand::MO_Immediate:
360 O << (int)MO.getImm();
362 case MachineOperand::MO_MachineBasicBlock:
363 O << *MO.getMBB()->getSymbol();
365 case MachineOperand::MO_GlobalAddress:
366 O << *getSymbol(MO.getGlobal());
368 case MachineOperand::MO_BlockAddress:
369 O << GetBlockAddressSymbol(MO.getBlockAddress())->getName();
371 case MachineOperand::MO_ExternalSymbol:
372 O << MO.getSymbolName();
374 case MachineOperand::MO_ConstantPoolIndex:
375 O << DL->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
379 llvm_unreachable("<unknown operand type>");
381 if (CloseParen) O << ")";
384 void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
385 raw_ostream &O, const char *Modifier) {
386 printOperand(MI, opNum, O);
388 // If this is an ADD operand, emit it like normal operands.
389 if (Modifier && !strcmp(Modifier, "arith")) {
391 printOperand(MI, opNum+1, O);
395 if (MI->getOperand(opNum+1).isReg() &&
396 MI->getOperand(opNum+1).getReg() == SP::G0)
397 return; // don't print "+%g0"
398 if (MI->getOperand(opNum+1).isImm() &&
399 MI->getOperand(opNum+1).getImm() == 0)
400 return; // don't print "+0"
403 printOperand(MI, opNum+1, O);
406 /// PrintAsmOperand - Print out an operand for an inline asm expression.
408 bool SparcAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
410 const char *ExtraCode,
412 if (ExtraCode && ExtraCode[0]) {
413 if (ExtraCode[1] != 0) return true; // Unknown modifier.
415 switch (ExtraCode[0]) {
417 // See if this is a generic print operand
418 return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
424 printOperand(MI, OpNo, O);
429 bool SparcAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
430 unsigned OpNo, unsigned AsmVariant,
431 const char *ExtraCode,
433 if (ExtraCode && ExtraCode[0])
434 return true; // Unknown modifier
437 printMemOperand(MI, OpNo, O);
443 void SparcAsmPrinter::EmitEndOfAsmFile(Module &M) {
444 const TargetLoweringObjectFileELF &TLOFELF =
445 static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
446 MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
448 // Generate stubs for global variables.
449 MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
450 if (!Stubs.empty()) {
451 OutStreamer.SwitchSection(TLOFELF.getDataSection());
452 unsigned PtrSize = TM.getDataLayout()->getPointerSize(0);
453 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
454 OutStreamer.EmitLabel(Stubs[i].first);
455 OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(), PtrSize);
460 // Force static initialization.
461 extern "C" void LLVMInitializeSparcAsmPrinter() {
462 RegisterAsmPrinter<SparcAsmPrinter> X(TheSparcTarget);
463 RegisterAsmPrinter<SparcAsmPrinter> Y(TheSparcV9Target);