1 //===-- MipsSEInstrInfo.cpp - Mips32/64 Instruction Information -----------===//
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 the Mips32/64 implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
14 #include "MipsSEInstrInfo.h"
15 #include "InstPrinter/MipsInstPrinter.h"
16 #include "MipsMachineFunction.h"
17 #include "MipsTargetMachine.h"
18 #include "llvm/ADT/STLExtras.h"
19 #include "llvm/CodeGen/MachineInstrBuilder.h"
20 #include "llvm/CodeGen/MachineRegisterInfo.h"
21 #include "llvm/Support/CommandLine.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/TargetRegistry.h"
27 static cl::opt<bool> NoDPLoadStore("mno-ldc1-sdc1", cl::init(false),
28 cl::desc("Expand double precision loads and "
29 "stores to their single precision "
32 MipsSEInstrInfo::MipsSEInstrInfo(MipsTargetMachine &tm)
34 tm.getRelocationModel() == Reloc::PIC_ ? Mips::B : Mips::J),
35 RI(*tm.getSubtargetImpl()),
36 IsN64(tm.getSubtarget<MipsSubtarget>().isABI_N64()) {}
38 const MipsRegisterInfo &MipsSEInstrInfo::getRegisterInfo() const {
42 /// isLoadFromStackSlot - If the specified machine instruction is a direct
43 /// load from a stack slot, return the virtual or physical register number of
44 /// the destination along with the FrameIndex of the loaded stack slot. If
45 /// not, return 0. This predicate must return 0 if the instruction has
46 /// any side effects other than loading from the stack slot.
47 unsigned MipsSEInstrInfo::
48 isLoadFromStackSlot(const MachineInstr *MI, int &FrameIndex) const
50 unsigned Opc = MI->getOpcode();
52 if ((Opc == Mips::LW) || (Opc == Mips::LD) ||
53 (Opc == Mips::LWC1) || (Opc == Mips::LDC1) || (Opc == Mips::LDC164)) {
54 if ((MI->getOperand(1).isFI()) && // is a stack slot
55 (MI->getOperand(2).isImm()) && // the imm is zero
56 (isZeroImm(MI->getOperand(2)))) {
57 FrameIndex = MI->getOperand(1).getIndex();
58 return MI->getOperand(0).getReg();
65 /// isStoreToStackSlot - If the specified machine instruction is a direct
66 /// store to a stack slot, return the virtual or physical register number of
67 /// the source reg along with the FrameIndex of the loaded stack slot. If
68 /// not, return 0. This predicate must return 0 if the instruction has
69 /// any side effects other than storing to the stack slot.
70 unsigned MipsSEInstrInfo::
71 isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const
73 unsigned Opc = MI->getOpcode();
75 if ((Opc == Mips::SW) || (Opc == Mips::SD) ||
76 (Opc == Mips::SWC1) || (Opc == Mips::SDC1) || (Opc == Mips::SDC164)) {
77 if ((MI->getOperand(1).isFI()) && // is a stack slot
78 (MI->getOperand(2).isImm()) && // the imm is zero
79 (isZeroImm(MI->getOperand(2)))) {
80 FrameIndex = MI->getOperand(1).getIndex();
81 return MI->getOperand(0).getReg();
87 void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
88 MachineBasicBlock::iterator I, DebugLoc DL,
89 unsigned DestReg, unsigned SrcReg,
91 unsigned Opc = 0, ZeroReg = 0;
93 if (Mips::GPR32RegClass.contains(DestReg)) { // Copy to CPU Reg.
94 if (Mips::GPR32RegClass.contains(SrcReg))
95 Opc = Mips::ADDu, ZeroReg = Mips::ZERO;
96 else if (Mips::CCRRegClass.contains(SrcReg))
98 else if (Mips::FGR32RegClass.contains(SrcReg))
100 else if (Mips::HI32RegClass.contains(SrcReg))
101 Opc = Mips::MFHI, SrcReg = 0;
102 else if (Mips::LO32RegClass.contains(SrcReg))
103 Opc = Mips::MFLO, SrcReg = 0;
104 else if (Mips::HI32DSPRegClass.contains(SrcReg))
105 Opc = Mips::MFHI_DSP;
106 else if (Mips::LO32DSPRegClass.contains(SrcReg))
107 Opc = Mips::MFLO_DSP;
108 else if (Mips::DSPCCRegClass.contains(SrcReg)) {
109 BuildMI(MBB, I, DL, get(Mips::RDDSP), DestReg).addImm(1 << 4)
110 .addReg(SrcReg, RegState::Implicit | getKillRegState(KillSrc));
113 else if (Mips::MSACtrlRegClass.contains(SrcReg))
116 else if (Mips::GPR32RegClass.contains(SrcReg)) { // Copy from CPU Reg.
117 if (Mips::CCRRegClass.contains(DestReg))
119 else if (Mips::FGR32RegClass.contains(DestReg))
121 else if (Mips::HI32RegClass.contains(DestReg))
122 Opc = Mips::MTHI, DestReg = 0;
123 else if (Mips::LO32RegClass.contains(DestReg))
124 Opc = Mips::MTLO, DestReg = 0;
125 else if (Mips::HI32DSPRegClass.contains(DestReg))
126 Opc = Mips::MTHI_DSP;
127 else if (Mips::LO32DSPRegClass.contains(DestReg))
128 Opc = Mips::MTLO_DSP;
129 else if (Mips::DSPCCRegClass.contains(DestReg)) {
130 BuildMI(MBB, I, DL, get(Mips::WRDSP))
131 .addReg(SrcReg, getKillRegState(KillSrc)).addImm(1 << 4)
132 .addReg(DestReg, RegState::ImplicitDefine);
135 else if (Mips::MSACtrlRegClass.contains(DestReg))
138 else if (Mips::FGR32RegClass.contains(DestReg, SrcReg))
140 else if (Mips::AFGR64RegClass.contains(DestReg, SrcReg))
141 Opc = Mips::FMOV_D32;
142 else if (Mips::FGR64RegClass.contains(DestReg, SrcReg))
143 Opc = Mips::FMOV_D64;
144 else if (Mips::GPR64RegClass.contains(DestReg)) { // Copy to CPU64 Reg.
145 if (Mips::GPR64RegClass.contains(SrcReg))
146 Opc = Mips::DADDu, ZeroReg = Mips::ZERO_64;
147 else if (Mips::HI64RegClass.contains(SrcReg))
148 Opc = Mips::MFHI64, SrcReg = 0;
149 else if (Mips::LO64RegClass.contains(SrcReg))
150 Opc = Mips::MFLO64, SrcReg = 0;
151 else if (Mips::FGR64RegClass.contains(SrcReg))
154 else if (Mips::GPR64RegClass.contains(SrcReg)) { // Copy from CPU64 Reg.
155 if (Mips::HI64RegClass.contains(DestReg))
156 Opc = Mips::MTHI64, DestReg = 0;
157 else if (Mips::LO64RegClass.contains(DestReg))
158 Opc = Mips::MTLO64, DestReg = 0;
159 else if (Mips::FGR64RegClass.contains(DestReg))
163 assert(Opc && "Cannot copy registers");
165 MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(Opc));
168 MIB.addReg(DestReg, RegState::Define);
171 MIB.addReg(SrcReg, getKillRegState(KillSrc));
177 void MipsSEInstrInfo::
178 storeRegToStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
179 unsigned SrcReg, bool isKill, int FI,
180 const TargetRegisterClass *RC, const TargetRegisterInfo *TRI,
181 int64_t Offset) const {
183 if (I != MBB.end()) DL = I->getDebugLoc();
184 MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOStore);
188 if (Mips::GPR32RegClass.hasSubClassEq(RC))
190 else if (Mips::GPR64RegClass.hasSubClassEq(RC))
192 else if (Mips::ACC64RegClass.hasSubClassEq(RC))
193 Opc = Mips::STORE_ACC64;
194 else if (Mips::ACC64DSPRegClass.hasSubClassEq(RC))
195 Opc = Mips::STORE_ACC64DSP;
196 else if (Mips::ACC128RegClass.hasSubClassEq(RC))
197 Opc = Mips::STORE_ACC128;
198 else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
199 Opc = Mips::STORE_CCOND_DSP;
200 else if (Mips::FGR32RegClass.hasSubClassEq(RC))
202 else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
204 else if (Mips::FGR64RegClass.hasSubClassEq(RC))
206 else if (RC->hasType(MVT::v16i8))
208 else if (RC->hasType(MVT::v8i16) || RC->hasType(MVT::v8f16))
210 else if (RC->hasType(MVT::v4i32) || RC->hasType(MVT::v4f32))
212 else if (RC->hasType(MVT::v2i64) || RC->hasType(MVT::v2f64))
215 assert(Opc && "Register class not handled!");
216 BuildMI(MBB, I, DL, get(Opc)).addReg(SrcReg, getKillRegState(isKill))
217 .addFrameIndex(FI).addImm(Offset).addMemOperand(MMO);
220 void MipsSEInstrInfo::
221 loadRegFromStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
222 unsigned DestReg, int FI, const TargetRegisterClass *RC,
223 const TargetRegisterInfo *TRI, int64_t Offset) const {
225 if (I != MBB.end()) DL = I->getDebugLoc();
226 MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOLoad);
229 if (Mips::GPR32RegClass.hasSubClassEq(RC))
231 else if (Mips::GPR64RegClass.hasSubClassEq(RC))
233 else if (Mips::ACC64RegClass.hasSubClassEq(RC))
234 Opc = Mips::LOAD_ACC64;
235 else if (Mips::ACC64DSPRegClass.hasSubClassEq(RC))
236 Opc = Mips::LOAD_ACC64DSP;
237 else if (Mips::ACC128RegClass.hasSubClassEq(RC))
238 Opc = Mips::LOAD_ACC128;
239 else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
240 Opc = Mips::LOAD_CCOND_DSP;
241 else if (Mips::FGR32RegClass.hasSubClassEq(RC))
243 else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
245 else if (Mips::FGR64RegClass.hasSubClassEq(RC))
247 else if (RC->hasType(MVT::v16i8))
249 else if (RC->hasType(MVT::v8i16) || RC->hasType(MVT::v8f16))
251 else if (RC->hasType(MVT::v4i32) || RC->hasType(MVT::v4f32))
253 else if (RC->hasType(MVT::v2i64) || RC->hasType(MVT::v2f64))
256 assert(Opc && "Register class not handled!");
257 BuildMI(MBB, I, DL, get(Opc), DestReg).addFrameIndex(FI).addImm(Offset)
261 bool MipsSEInstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const {
262 MachineBasicBlock &MBB = *MI->getParent();
264 switch(MI->getDesc().getOpcode()) {
268 expandRetRA(MBB, MI, Mips::RET);
270 case Mips::PseudoCVT_S_W:
271 expandCvtFPInt(MBB, MI, Mips::CVT_S_W, Mips::MTC1, false);
273 case Mips::PseudoCVT_D32_W:
274 expandCvtFPInt(MBB, MI, Mips::CVT_D32_W, Mips::MTC1, false);
276 case Mips::PseudoCVT_S_L:
277 expandCvtFPInt(MBB, MI, Mips::CVT_S_L, Mips::DMTC1, true);
279 case Mips::PseudoCVT_D64_W:
280 expandCvtFPInt(MBB, MI, Mips::CVT_D64_W, Mips::MTC1, true);
282 case Mips::PseudoCVT_D64_L:
283 expandCvtFPInt(MBB, MI, Mips::CVT_D64_L, Mips::DMTC1, true);
285 case Mips::BuildPairF64:
286 expandBuildPairF64(MBB, MI, false);
288 case Mips::BuildPairF64_64:
289 expandBuildPairF64(MBB, MI, true);
291 case Mips::ExtractElementF64:
292 expandExtractElementF64(MBB, MI, false);
294 case Mips::ExtractElementF64_64:
295 expandExtractElementF64(MBB, MI, true);
297 case Mips::PseudoLDC1:
298 expandDPLoadStore(MBB, MI, Mips::LDC1, Mips::LWC1);
300 case Mips::PseudoSDC1:
301 expandDPLoadStore(MBB, MI, Mips::SDC1, Mips::SWC1);
303 case Mips::MIPSeh_return32:
304 case Mips::MIPSeh_return64:
305 expandEhReturn(MBB, MI);
313 /// getOppositeBranchOpc - Return the inverse of the specified
314 /// opcode, e.g. turning BEQ to BNE.
315 unsigned MipsSEInstrInfo::getOppositeBranchOpc(unsigned Opc) const {
317 default: llvm_unreachable("Illegal opcode!");
318 case Mips::BEQ: return Mips::BNE;
319 case Mips::BNE: return Mips::BEQ;
320 case Mips::BGTZ: return Mips::BLEZ;
321 case Mips::BGEZ: return Mips::BLTZ;
322 case Mips::BLTZ: return Mips::BGEZ;
323 case Mips::BLEZ: return Mips::BGTZ;
324 case Mips::BEQ64: return Mips::BNE64;
325 case Mips::BNE64: return Mips::BEQ64;
326 case Mips::BGTZ64: return Mips::BLEZ64;
327 case Mips::BGEZ64: return Mips::BLTZ64;
328 case Mips::BLTZ64: return Mips::BGEZ64;
329 case Mips::BLEZ64: return Mips::BGTZ64;
330 case Mips::BC1T: return Mips::BC1F;
331 case Mips::BC1F: return Mips::BC1T;
335 /// Adjust SP by Amount bytes.
336 void MipsSEInstrInfo::adjustStackPtr(unsigned SP, int64_t Amount,
337 MachineBasicBlock &MBB,
338 MachineBasicBlock::iterator I) const {
339 const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
340 DebugLoc DL = I != MBB.end() ? I->getDebugLoc() : DebugLoc();
341 unsigned ADDu = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
342 unsigned ADDiu = STI.isABI_N64() ? Mips::DADDiu : Mips::ADDiu;
344 if (isInt<16>(Amount))// addi sp, sp, amount
345 BuildMI(MBB, I, DL, get(ADDiu), SP).addReg(SP).addImm(Amount);
346 else { // Expand immediate that doesn't fit in 16-bit.
347 unsigned Reg = loadImmediate(Amount, MBB, I, DL, 0);
348 BuildMI(MBB, I, DL, get(ADDu), SP).addReg(SP).addReg(Reg, RegState::Kill);
352 /// This function generates the sequence of instructions needed to get the
353 /// result of adding register REG and immediate IMM.
355 MipsSEInstrInfo::loadImmediate(int64_t Imm, MachineBasicBlock &MBB,
356 MachineBasicBlock::iterator II, DebugLoc DL,
357 unsigned *NewImm) const {
358 MipsAnalyzeImmediate AnalyzeImm;
359 const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
360 MachineRegisterInfo &RegInfo = MBB.getParent()->getRegInfo();
361 unsigned Size = STI.isABI_N64() ? 64 : 32;
362 unsigned LUi = STI.isABI_N64() ? Mips::LUi64 : Mips::LUi;
363 unsigned ZEROReg = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
364 const TargetRegisterClass *RC = STI.isABI_N64() ?
365 &Mips::GPR64RegClass : &Mips::GPR32RegClass;
366 bool LastInstrIsADDiu = NewImm;
368 const MipsAnalyzeImmediate::InstSeq &Seq =
369 AnalyzeImm.Analyze(Imm, Size, LastInstrIsADDiu);
370 MipsAnalyzeImmediate::InstSeq::const_iterator Inst = Seq.begin();
372 assert(Seq.size() && (!LastInstrIsADDiu || (Seq.size() > 1)));
374 // The first instruction can be a LUi, which is different from other
375 // instructions (ADDiu, ORI and SLL) in that it does not have a register
377 unsigned Reg = RegInfo.createVirtualRegister(RC);
379 if (Inst->Opc == LUi)
380 BuildMI(MBB, II, DL, get(LUi), Reg).addImm(SignExtend64<16>(Inst->ImmOpnd));
382 BuildMI(MBB, II, DL, get(Inst->Opc), Reg).addReg(ZEROReg)
383 .addImm(SignExtend64<16>(Inst->ImmOpnd));
385 // Build the remaining instructions in Seq.
386 for (++Inst; Inst != Seq.end() - LastInstrIsADDiu; ++Inst)
387 BuildMI(MBB, II, DL, get(Inst->Opc), Reg).addReg(Reg, RegState::Kill)
388 .addImm(SignExtend64<16>(Inst->ImmOpnd));
390 if (LastInstrIsADDiu)
391 *NewImm = Inst->ImmOpnd;
396 unsigned MipsSEInstrInfo::getAnalyzableBrOpc(unsigned Opc) const {
397 return (Opc == Mips::BEQ || Opc == Mips::BNE || Opc == Mips::BGTZ ||
398 Opc == Mips::BGEZ || Opc == Mips::BLTZ || Opc == Mips::BLEZ ||
399 Opc == Mips::BEQ64 || Opc == Mips::BNE64 || Opc == Mips::BGTZ64 ||
400 Opc == Mips::BGEZ64 || Opc == Mips::BLTZ64 || Opc == Mips::BLEZ64 ||
401 Opc == Mips::BC1T || Opc == Mips::BC1F || Opc == Mips::B ||
406 void MipsSEInstrInfo::expandRetRA(MachineBasicBlock &MBB,
407 MachineBasicBlock::iterator I,
408 unsigned Opc) const {
409 BuildMI(MBB, I, I->getDebugLoc(), get(Opc)).addReg(Mips::RA);
412 std::pair<bool, bool>
413 MipsSEInstrInfo::compareOpndSize(unsigned Opc,
414 const MachineFunction &MF) const {
415 const MCInstrDesc &Desc = get(Opc);
416 assert(Desc.NumOperands == 2 && "Unary instruction expected.");
417 const MipsRegisterInfo *RI = &getRegisterInfo();
418 unsigned DstRegSize = getRegClass(Desc, 0, RI, MF)->getSize();
419 unsigned SrcRegSize = getRegClass(Desc, 1, RI, MF)->getSize();
421 return std::make_pair(DstRegSize > SrcRegSize, DstRegSize < SrcRegSize);
424 void MipsSEInstrInfo::expandCvtFPInt(MachineBasicBlock &MBB,
425 MachineBasicBlock::iterator I,
426 unsigned CvtOpc, unsigned MovOpc,
428 const MCInstrDesc &CvtDesc = get(CvtOpc), &MovDesc = get(MovOpc);
429 const MachineOperand &Dst = I->getOperand(0), &Src = I->getOperand(1);
430 unsigned DstReg = Dst.getReg(), SrcReg = Src.getReg(), TmpReg = DstReg;
431 unsigned KillSrc = getKillRegState(Src.isKill());
432 DebugLoc DL = I->getDebugLoc();
433 bool DstIsLarger, SrcIsLarger;
435 tie(DstIsLarger, SrcIsLarger) = compareOpndSize(CvtOpc, *MBB.getParent());
438 TmpReg = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
441 DstReg = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
443 BuildMI(MBB, I, DL, MovDesc, TmpReg).addReg(SrcReg, KillSrc);
444 BuildMI(MBB, I, DL, CvtDesc, DstReg).addReg(TmpReg, RegState::Kill);
447 void MipsSEInstrInfo::expandExtractElementF64(MachineBasicBlock &MBB,
448 MachineBasicBlock::iterator I,
450 unsigned DstReg = I->getOperand(0).getReg();
451 unsigned SrcReg = I->getOperand(1).getReg();
452 unsigned N = I->getOperand(2).getImm();
453 DebugLoc dl = I->getDebugLoc();
455 assert(N < 2 && "Invalid immediate");
456 unsigned SubIdx = N ? Mips::sub_hi : Mips::sub_lo;
457 unsigned SubReg = getRegisterInfo().getSubReg(SrcReg, SubIdx);
459 if (SubIdx == Mips::sub_hi && FP64)
460 BuildMI(MBB, I, dl, get(Mips::MFHC1), DstReg).addReg(SubReg);
462 BuildMI(MBB, I, dl, get(Mips::MFC1), DstReg).addReg(SubReg);
465 void MipsSEInstrInfo::expandBuildPairF64(MachineBasicBlock &MBB,
466 MachineBasicBlock::iterator I,
468 unsigned DstReg = I->getOperand(0).getReg();
469 unsigned LoReg = I->getOperand(1).getReg(), HiReg = I->getOperand(2).getReg();
470 const MCInstrDesc& Mtc1Tdd = get(Mips::MTC1);
471 DebugLoc dl = I->getDebugLoc();
472 const TargetRegisterInfo &TRI = getRegisterInfo();
476 BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_lo))
480 BuildMI(MBB, I, dl, get(Mips::MTHC1), TRI.getSubReg(DstReg, Mips::sub_hi))
483 BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_hi))
487 /// Add 4 to the displacement of operand MO.
488 static void fixDisp(MachineOperand &MO) {
489 switch (MO.getType()) {
491 llvm_unreachable("Unhandled operand type.");
492 case MachineOperand::MO_Immediate:
493 MO.setImm(MO.getImm() + 4);
495 case MachineOperand::MO_GlobalAddress:
496 case MachineOperand::MO_ConstantPoolIndex:
497 case MachineOperand::MO_BlockAddress:
498 case MachineOperand::MO_TargetIndex:
499 case MachineOperand::MO_ExternalSymbol:
500 MO.setOffset(MO.getOffset() + 4);
505 void MipsSEInstrInfo::expandDPLoadStore(MachineBasicBlock &MBB,
506 MachineBasicBlock::iterator I,
507 unsigned OpcD, unsigned OpcS) const {
508 // If NoDPLoadStore is false, just change the opcode.
509 if (!NoDPLoadStore) {
510 genInstrWithNewOpc(OpcD, I);
514 // Expand a double precision FP load or store to two single precision
517 const TargetRegisterInfo &TRI = getRegisterInfo();
518 const MachineOperand &ValReg = I->getOperand(0);
519 unsigned LoReg = TRI.getSubReg(ValReg.getReg(), Mips::sub_lo);
520 unsigned HiReg = TRI.getSubReg(ValReg.getReg(), Mips::sub_hi);
522 if (!TM.getSubtarget<MipsSubtarget>().isLittle())
523 std::swap(LoReg, HiReg);
525 // Create an instruction which loads from or stores to the lower memory
527 MachineInstrBuilder MIB = genInstrWithNewOpc(OpcS, I);
528 MIB->getOperand(0).setReg(LoReg);
530 // Create an instruction which loads from or stores to the higher memory
532 MIB = genInstrWithNewOpc(OpcS, I);
533 MIB->getOperand(0).setReg(HiReg);
534 fixDisp(MIB->getOperand(2));
537 void MipsSEInstrInfo::expandEhReturn(MachineBasicBlock &MBB,
538 MachineBasicBlock::iterator I) const {
539 // This pseudo instruction is generated as part of the lowering of
540 // ISD::EH_RETURN. We convert it to a stack increment by OffsetReg, and
541 // indirect jump to TargetReg
542 const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
543 unsigned ADDU = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
544 unsigned JR = STI.isABI_N64() ? Mips::JR64 : Mips::JR;
545 unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
546 unsigned RA = STI.isABI_N64() ? Mips::RA_64 : Mips::RA;
547 unsigned T9 = STI.isABI_N64() ? Mips::T9_64 : Mips::T9;
548 unsigned ZERO = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
549 unsigned OffsetReg = I->getOperand(0).getReg();
550 unsigned TargetReg = I->getOperand(1).getReg();
552 // addu $ra, $v0, $zero
553 // addu $sp, $sp, $v1
555 if (TM.getRelocationModel() == Reloc::PIC_)
556 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), T9)
557 .addReg(TargetReg).addReg(ZERO);
558 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), RA)
559 .addReg(TargetReg).addReg(ZERO);
560 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), SP)
561 .addReg(SP).addReg(OffsetReg);
562 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(JR)).addReg(RA);
565 const MipsInstrInfo *llvm::createMipsSEInstrInfo(MipsTargetMachine &TM) {
566 return new MipsSEInstrInfo(TM);