1 //===-- MipsISelLowering.cpp - Mips DAG Lowering Implementation -----------===//
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 defines the interfaces that Mips uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
14 #include "MipsISelLowering.h"
15 #include "InstPrinter/MipsInstPrinter.h"
16 #include "MCTargetDesc/MipsBaseInfo.h"
17 #include "MipsMachineFunction.h"
18 #include "MipsSubtarget.h"
19 #include "MipsTargetMachine.h"
20 #include "MipsTargetObjectFile.h"
21 #include "llvm/ADT/Statistic.h"
22 #include "llvm/ADT/StringSwitch.h"
23 #include "llvm/CodeGen/CallingConvLower.h"
24 #include "llvm/CodeGen/MachineFrameInfo.h"
25 #include "llvm/CodeGen/MachineFunction.h"
26 #include "llvm/CodeGen/MachineInstrBuilder.h"
27 #include "llvm/CodeGen/MachineRegisterInfo.h"
28 #include "llvm/CodeGen/SelectionDAGISel.h"
29 #include "llvm/CodeGen/ValueTypes.h"
30 #include "llvm/IR/CallingConv.h"
31 #include "llvm/IR/DerivedTypes.h"
32 #include "llvm/IR/GlobalVariable.h"
33 #include "llvm/Support/CommandLine.h"
34 #include "llvm/Support/Debug.h"
35 #include "llvm/Support/ErrorHandling.h"
36 #include "llvm/Support/raw_ostream.h"
41 #define DEBUG_TYPE "mips-lower"
43 STATISTIC(NumTailCalls, "Number of tail calls");
46 LargeGOT("mxgot", cl::Hidden,
47 cl::desc("MIPS: Enable GOT larger than 64k."), cl::init(false));
50 NoZeroDivCheck("mno-check-zero-division", cl::Hidden,
51 cl::desc("MIPS: Don't trap on integer division by zero."),
55 EnableMipsFastISel("mips-fast-isel", cl::Hidden,
56 cl::desc("Allow mips-fast-isel to be used"),
59 static const MCPhysReg O32IntRegs[4] = {
60 Mips::A0, Mips::A1, Mips::A2, Mips::A3
63 static const MCPhysReg Mips64IntRegs[8] = {
64 Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64,
65 Mips::T0_64, Mips::T1_64, Mips::T2_64, Mips::T3_64
68 static const MCPhysReg Mips64DPRegs[8] = {
69 Mips::D12_64, Mips::D13_64, Mips::D14_64, Mips::D15_64,
70 Mips::D16_64, Mips::D17_64, Mips::D18_64, Mips::D19_64
73 // If I is a shifted mask, set the size (Size) and the first bit of the
74 // mask (Pos), and return true.
75 // For example, if I is 0x003ff800, (Pos, Size) = (11, 11).
76 static bool isShiftedMask(uint64_t I, uint64_t &Pos, uint64_t &Size) {
77 if (!isShiftedMask_64(I))
80 Size = CountPopulation_64(I);
81 Pos = countTrailingZeros(I);
85 SDValue MipsTargetLowering::getGlobalReg(SelectionDAG &DAG, EVT Ty) const {
86 MipsFunctionInfo *FI = DAG.getMachineFunction().getInfo<MipsFunctionInfo>();
87 return DAG.getRegister(FI->getGlobalBaseReg(), Ty);
90 SDValue MipsTargetLowering::getTargetNode(GlobalAddressSDNode *N, EVT Ty,
92 unsigned Flag) const {
93 return DAG.getTargetGlobalAddress(N->getGlobal(), SDLoc(N), Ty, 0, Flag);
96 SDValue MipsTargetLowering::getTargetNode(ExternalSymbolSDNode *N, EVT Ty,
98 unsigned Flag) const {
99 return DAG.getTargetExternalSymbol(N->getSymbol(), Ty, Flag);
102 SDValue MipsTargetLowering::getTargetNode(BlockAddressSDNode *N, EVT Ty,
104 unsigned Flag) const {
105 return DAG.getTargetBlockAddress(N->getBlockAddress(), Ty, 0, Flag);
108 SDValue MipsTargetLowering::getTargetNode(JumpTableSDNode *N, EVT Ty,
110 unsigned Flag) const {
111 return DAG.getTargetJumpTable(N->getIndex(), Ty, Flag);
114 SDValue MipsTargetLowering::getTargetNode(ConstantPoolSDNode *N, EVT Ty,
116 unsigned Flag) const {
117 return DAG.getTargetConstantPool(N->getConstVal(), Ty, N->getAlignment(),
118 N->getOffset(), Flag);
121 const char *MipsTargetLowering::getTargetNodeName(unsigned Opcode) const {
123 case MipsISD::JmpLink: return "MipsISD::JmpLink";
124 case MipsISD::TailCall: return "MipsISD::TailCall";
125 case MipsISD::Hi: return "MipsISD::Hi";
126 case MipsISD::Lo: return "MipsISD::Lo";
127 case MipsISD::GPRel: return "MipsISD::GPRel";
128 case MipsISD::ThreadPointer: return "MipsISD::ThreadPointer";
129 case MipsISD::Ret: return "MipsISD::Ret";
130 case MipsISD::EH_RETURN: return "MipsISD::EH_RETURN";
131 case MipsISD::FPBrcond: return "MipsISD::FPBrcond";
132 case MipsISD::FPCmp: return "MipsISD::FPCmp";
133 case MipsISD::CMovFP_T: return "MipsISD::CMovFP_T";
134 case MipsISD::CMovFP_F: return "MipsISD::CMovFP_F";
135 case MipsISD::TruncIntFP: return "MipsISD::TruncIntFP";
136 case MipsISD::MFHI: return "MipsISD::MFHI";
137 case MipsISD::MFLO: return "MipsISD::MFLO";
138 case MipsISD::MTLOHI: return "MipsISD::MTLOHI";
139 case MipsISD::Mult: return "MipsISD::Mult";
140 case MipsISD::Multu: return "MipsISD::Multu";
141 case MipsISD::MAdd: return "MipsISD::MAdd";
142 case MipsISD::MAddu: return "MipsISD::MAddu";
143 case MipsISD::MSub: return "MipsISD::MSub";
144 case MipsISD::MSubu: return "MipsISD::MSubu";
145 case MipsISD::DivRem: return "MipsISD::DivRem";
146 case MipsISD::DivRemU: return "MipsISD::DivRemU";
147 case MipsISD::DivRem16: return "MipsISD::DivRem16";
148 case MipsISD::DivRemU16: return "MipsISD::DivRemU16";
149 case MipsISD::BuildPairF64: return "MipsISD::BuildPairF64";
150 case MipsISD::ExtractElementF64: return "MipsISD::ExtractElementF64";
151 case MipsISD::Wrapper: return "MipsISD::Wrapper";
152 case MipsISD::Sync: return "MipsISD::Sync";
153 case MipsISD::Ext: return "MipsISD::Ext";
154 case MipsISD::Ins: return "MipsISD::Ins";
155 case MipsISD::LWL: return "MipsISD::LWL";
156 case MipsISD::LWR: return "MipsISD::LWR";
157 case MipsISD::SWL: return "MipsISD::SWL";
158 case MipsISD::SWR: return "MipsISD::SWR";
159 case MipsISD::LDL: return "MipsISD::LDL";
160 case MipsISD::LDR: return "MipsISD::LDR";
161 case MipsISD::SDL: return "MipsISD::SDL";
162 case MipsISD::SDR: return "MipsISD::SDR";
163 case MipsISD::EXTP: return "MipsISD::EXTP";
164 case MipsISD::EXTPDP: return "MipsISD::EXTPDP";
165 case MipsISD::EXTR_S_H: return "MipsISD::EXTR_S_H";
166 case MipsISD::EXTR_W: return "MipsISD::EXTR_W";
167 case MipsISD::EXTR_R_W: return "MipsISD::EXTR_R_W";
168 case MipsISD::EXTR_RS_W: return "MipsISD::EXTR_RS_W";
169 case MipsISD::SHILO: return "MipsISD::SHILO";
170 case MipsISD::MTHLIP: return "MipsISD::MTHLIP";
171 case MipsISD::MULT: return "MipsISD::MULT";
172 case MipsISD::MULTU: return "MipsISD::MULTU";
173 case MipsISD::MADD_DSP: return "MipsISD::MADD_DSP";
174 case MipsISD::MADDU_DSP: return "MipsISD::MADDU_DSP";
175 case MipsISD::MSUB_DSP: return "MipsISD::MSUB_DSP";
176 case MipsISD::MSUBU_DSP: return "MipsISD::MSUBU_DSP";
177 case MipsISD::SHLL_DSP: return "MipsISD::SHLL_DSP";
178 case MipsISD::SHRA_DSP: return "MipsISD::SHRA_DSP";
179 case MipsISD::SHRL_DSP: return "MipsISD::SHRL_DSP";
180 case MipsISD::SETCC_DSP: return "MipsISD::SETCC_DSP";
181 case MipsISD::SELECT_CC_DSP: return "MipsISD::SELECT_CC_DSP";
182 case MipsISD::VALL_ZERO: return "MipsISD::VALL_ZERO";
183 case MipsISD::VANY_ZERO: return "MipsISD::VANY_ZERO";
184 case MipsISD::VALL_NONZERO: return "MipsISD::VALL_NONZERO";
185 case MipsISD::VANY_NONZERO: return "MipsISD::VANY_NONZERO";
186 case MipsISD::VCEQ: return "MipsISD::VCEQ";
187 case MipsISD::VCLE_S: return "MipsISD::VCLE_S";
188 case MipsISD::VCLE_U: return "MipsISD::VCLE_U";
189 case MipsISD::VCLT_S: return "MipsISD::VCLT_S";
190 case MipsISD::VCLT_U: return "MipsISD::VCLT_U";
191 case MipsISD::VSMAX: return "MipsISD::VSMAX";
192 case MipsISD::VSMIN: return "MipsISD::VSMIN";
193 case MipsISD::VUMAX: return "MipsISD::VUMAX";
194 case MipsISD::VUMIN: return "MipsISD::VUMIN";
195 case MipsISD::VEXTRACT_SEXT_ELT: return "MipsISD::VEXTRACT_SEXT_ELT";
196 case MipsISD::VEXTRACT_ZEXT_ELT: return "MipsISD::VEXTRACT_ZEXT_ELT";
197 case MipsISD::VNOR: return "MipsISD::VNOR";
198 case MipsISD::VSHF: return "MipsISD::VSHF";
199 case MipsISD::SHF: return "MipsISD::SHF";
200 case MipsISD::ILVEV: return "MipsISD::ILVEV";
201 case MipsISD::ILVOD: return "MipsISD::ILVOD";
202 case MipsISD::ILVL: return "MipsISD::ILVL";
203 case MipsISD::ILVR: return "MipsISD::ILVR";
204 case MipsISD::PCKEV: return "MipsISD::PCKEV";
205 case MipsISD::PCKOD: return "MipsISD::PCKOD";
206 case MipsISD::INSVE: return "MipsISD::INSVE";
207 default: return nullptr;
211 MipsTargetLowering::MipsTargetLowering(MipsTargetMachine &TM)
212 : TargetLowering(TM, new MipsTargetObjectFile()),
213 Subtarget(&TM.getSubtarget<MipsSubtarget>()) {
214 // Mips does not have i1 type, so use i32 for
215 // setcc operations results (slt, sgt, ...).
216 setBooleanContents(ZeroOrOneBooleanContent);
217 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
219 // Load extented operations for i1 types must be promoted
220 setLoadExtAction(ISD::EXTLOAD, MVT::i1, Promote);
221 setLoadExtAction(ISD::ZEXTLOAD, MVT::i1, Promote);
222 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
224 // MIPS doesn't have extending float->double load/store
225 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
226 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
228 // Used by legalize types to correctly generate the setcc result.
229 // Without this, every float setcc comes with a AND/OR with the result,
230 // we don't want this, since the fpcmp result goes to a flag register,
231 // which is used implicitly by brcond and select operations.
232 AddPromotedToType(ISD::SETCC, MVT::i1, MVT::i32);
234 // Mips Custom Operations
235 setOperationAction(ISD::BR_JT, MVT::Other, Custom);
236 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
237 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
238 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
239 setOperationAction(ISD::JumpTable, MVT::i32, Custom);
240 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
241 setOperationAction(ISD::SELECT, MVT::f32, Custom);
242 setOperationAction(ISD::SELECT, MVT::f64, Custom);
243 setOperationAction(ISD::SELECT, MVT::i32, Custom);
244 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
245 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
246 setOperationAction(ISD::SETCC, MVT::f32, Custom);
247 setOperationAction(ISD::SETCC, MVT::f64, Custom);
248 setOperationAction(ISD::BRCOND, MVT::Other, Custom);
249 setOperationAction(ISD::VASTART, MVT::Other, Custom);
250 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
251 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
252 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
255 setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
256 setOperationAction(ISD::BlockAddress, MVT::i64, Custom);
257 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
258 setOperationAction(ISD::JumpTable, MVT::i64, Custom);
259 setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
260 setOperationAction(ISD::SELECT, MVT::i64, Custom);
261 setOperationAction(ISD::LOAD, MVT::i64, Custom);
262 setOperationAction(ISD::STORE, MVT::i64, Custom);
263 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
267 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
268 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
269 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
272 setOperationAction(ISD::ADD, MVT::i32, Custom);
274 setOperationAction(ISD::ADD, MVT::i64, Custom);
276 setOperationAction(ISD::SDIV, MVT::i32, Expand);
277 setOperationAction(ISD::SREM, MVT::i32, Expand);
278 setOperationAction(ISD::UDIV, MVT::i32, Expand);
279 setOperationAction(ISD::UREM, MVT::i32, Expand);
280 setOperationAction(ISD::SDIV, MVT::i64, Expand);
281 setOperationAction(ISD::SREM, MVT::i64, Expand);
282 setOperationAction(ISD::UDIV, MVT::i64, Expand);
283 setOperationAction(ISD::UREM, MVT::i64, Expand);
285 // Operations not directly supported by Mips.
286 setOperationAction(ISD::BR_CC, MVT::f32, Expand);
287 setOperationAction(ISD::BR_CC, MVT::f64, Expand);
288 setOperationAction(ISD::BR_CC, MVT::i32, Expand);
289 setOperationAction(ISD::BR_CC, MVT::i64, Expand);
290 setOperationAction(ISD::SELECT_CC, MVT::i32, Expand);
291 setOperationAction(ISD::SELECT_CC, MVT::i64, Expand);
292 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
293 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
294 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
295 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
296 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
297 if (Subtarget->hasCnMips()) {
298 setOperationAction(ISD::CTPOP, MVT::i32, Legal);
299 setOperationAction(ISD::CTPOP, MVT::i64, Legal);
301 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
302 setOperationAction(ISD::CTPOP, MVT::i64, Expand);
304 setOperationAction(ISD::CTTZ, MVT::i32, Expand);
305 setOperationAction(ISD::CTTZ, MVT::i64, Expand);
306 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
307 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
308 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
309 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
310 setOperationAction(ISD::ROTL, MVT::i32, Expand);
311 setOperationAction(ISD::ROTL, MVT::i64, Expand);
312 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
313 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
315 if (!Subtarget->hasMips32r2())
316 setOperationAction(ISD::ROTR, MVT::i32, Expand);
318 if (!Subtarget->hasMips64r2())
319 setOperationAction(ISD::ROTR, MVT::i64, Expand);
321 setOperationAction(ISD::FSIN, MVT::f32, Expand);
322 setOperationAction(ISD::FSIN, MVT::f64, Expand);
323 setOperationAction(ISD::FCOS, MVT::f32, Expand);
324 setOperationAction(ISD::FCOS, MVT::f64, Expand);
325 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
326 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
327 setOperationAction(ISD::FPOWI, MVT::f32, Expand);
328 setOperationAction(ISD::FPOW, MVT::f32, Expand);
329 setOperationAction(ISD::FPOW, MVT::f64, Expand);
330 setOperationAction(ISD::FLOG, MVT::f32, Expand);
331 setOperationAction(ISD::FLOG2, MVT::f32, Expand);
332 setOperationAction(ISD::FLOG10, MVT::f32, Expand);
333 setOperationAction(ISD::FEXP, MVT::f32, Expand);
334 setOperationAction(ISD::FMA, MVT::f32, Expand);
335 setOperationAction(ISD::FMA, MVT::f64, Expand);
336 setOperationAction(ISD::FREM, MVT::f32, Expand);
337 setOperationAction(ISD::FREM, MVT::f64, Expand);
339 setOperationAction(ISD::EH_RETURN, MVT::Other, Custom);
341 setOperationAction(ISD::VAARG, MVT::Other, Expand);
342 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
343 setOperationAction(ISD::VAEND, MVT::Other, Expand);
345 // Use the default for now
346 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
347 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
349 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Expand);
350 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Expand);
351 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Expand);
352 setOperationAction(ISD::ATOMIC_STORE, MVT::i64, Expand);
354 setInsertFencesForAtomic(true);
356 if (!Subtarget->hasMips32r2()) {
357 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
358 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
361 // MIPS16 lacks MIPS32's clz and clo instructions.
362 if (!Subtarget->hasMips32() || Subtarget->inMips16Mode())
363 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
364 if (!Subtarget->hasMips64())
365 setOperationAction(ISD::CTLZ, MVT::i64, Expand);
367 if (!Subtarget->hasMips32r2())
368 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
369 if (!Subtarget->hasMips64r2())
370 setOperationAction(ISD::BSWAP, MVT::i64, Expand);
373 setLoadExtAction(ISD::SEXTLOAD, MVT::i32, Custom);
374 setLoadExtAction(ISD::ZEXTLOAD, MVT::i32, Custom);
375 setLoadExtAction(ISD::EXTLOAD, MVT::i32, Custom);
376 setTruncStoreAction(MVT::i64, MVT::i32, Custom);
379 setOperationAction(ISD::TRAP, MVT::Other, Legal);
381 setTargetDAGCombine(ISD::SDIVREM);
382 setTargetDAGCombine(ISD::UDIVREM);
383 setTargetDAGCombine(ISD::SELECT);
384 setTargetDAGCombine(ISD::AND);
385 setTargetDAGCombine(ISD::OR);
386 setTargetDAGCombine(ISD::ADD);
388 setMinFunctionAlignment(isGP64bit() ? 3 : 2);
390 setStackPointerRegisterToSaveRestore(isN64() ? Mips::SP_64 : Mips::SP);
392 setExceptionPointerRegister(isN64() ? Mips::A0_64 : Mips::A0);
393 setExceptionSelectorRegister(isN64() ? Mips::A1_64 : Mips::A1);
395 MaxStoresPerMemcpy = 16;
397 isMicroMips = Subtarget->inMicroMipsMode();
400 const MipsTargetLowering *MipsTargetLowering::create(MipsTargetMachine &TM) {
401 if (TM.getSubtargetImpl()->inMips16Mode())
402 return llvm::createMips16TargetLowering(TM);
404 return llvm::createMipsSETargetLowering(TM);
407 // Create a fast isel object.
409 MipsTargetLowering::createFastISel(FunctionLoweringInfo &funcInfo,
410 const TargetLibraryInfo *libInfo) const {
411 if (!EnableMipsFastISel)
412 return TargetLowering::createFastISel(funcInfo, libInfo);
413 return Mips::createFastISel(funcInfo, libInfo);
416 EVT MipsTargetLowering::getSetCCResultType(LLVMContext &, EVT VT) const {
419 return VT.changeVectorElementTypeToInteger();
422 static SDValue performDivRemCombine(SDNode *N, SelectionDAG &DAG,
423 TargetLowering::DAGCombinerInfo &DCI,
424 const MipsSubtarget *Subtarget) {
425 if (DCI.isBeforeLegalizeOps())
428 EVT Ty = N->getValueType(0);
429 unsigned LO = (Ty == MVT::i32) ? Mips::LO0 : Mips::LO0_64;
430 unsigned HI = (Ty == MVT::i32) ? Mips::HI0 : Mips::HI0_64;
431 unsigned Opc = N->getOpcode() == ISD::SDIVREM ? MipsISD::DivRem16 :
435 SDValue DivRem = DAG.getNode(Opc, DL, MVT::Glue,
436 N->getOperand(0), N->getOperand(1));
437 SDValue InChain = DAG.getEntryNode();
438 SDValue InGlue = DivRem;
441 if (N->hasAnyUseOfValue(0)) {
442 SDValue CopyFromLo = DAG.getCopyFromReg(InChain, DL, LO, Ty,
444 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), CopyFromLo);
445 InChain = CopyFromLo.getValue(1);
446 InGlue = CopyFromLo.getValue(2);
450 if (N->hasAnyUseOfValue(1)) {
451 SDValue CopyFromHi = DAG.getCopyFromReg(InChain, DL,
453 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), CopyFromHi);
459 static Mips::CondCode condCodeToFCC(ISD::CondCode CC) {
461 default: llvm_unreachable("Unknown fp condition code!");
463 case ISD::SETOEQ: return Mips::FCOND_OEQ;
464 case ISD::SETUNE: return Mips::FCOND_UNE;
466 case ISD::SETOLT: return Mips::FCOND_OLT;
468 case ISD::SETOGT: return Mips::FCOND_OGT;
470 case ISD::SETOLE: return Mips::FCOND_OLE;
472 case ISD::SETOGE: return Mips::FCOND_OGE;
473 case ISD::SETULT: return Mips::FCOND_ULT;
474 case ISD::SETULE: return Mips::FCOND_ULE;
475 case ISD::SETUGT: return Mips::FCOND_UGT;
476 case ISD::SETUGE: return Mips::FCOND_UGE;
477 case ISD::SETUO: return Mips::FCOND_UN;
478 case ISD::SETO: return Mips::FCOND_OR;
480 case ISD::SETONE: return Mips::FCOND_ONE;
481 case ISD::SETUEQ: return Mips::FCOND_UEQ;
486 /// This function returns true if the floating point conditional branches and
487 /// conditional moves which use condition code CC should be inverted.
488 static bool invertFPCondCodeUser(Mips::CondCode CC) {
489 if (CC >= Mips::FCOND_F && CC <= Mips::FCOND_NGT)
492 assert((CC >= Mips::FCOND_T && CC <= Mips::FCOND_GT) &&
493 "Illegal Condition Code");
498 // Creates and returns an FPCmp node from a setcc node.
499 // Returns Op if setcc is not a floating point comparison.
500 static SDValue createFPCmp(SelectionDAG &DAG, const SDValue &Op) {
501 // must be a SETCC node
502 if (Op.getOpcode() != ISD::SETCC)
505 SDValue LHS = Op.getOperand(0);
507 if (!LHS.getValueType().isFloatingPoint())
510 SDValue RHS = Op.getOperand(1);
513 // Assume the 3rd operand is a CondCodeSDNode. Add code to check the type of
514 // node if necessary.
515 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
517 return DAG.getNode(MipsISD::FPCmp, DL, MVT::Glue, LHS, RHS,
518 DAG.getConstant(condCodeToFCC(CC), MVT::i32));
521 // Creates and returns a CMovFPT/F node.
522 static SDValue createCMovFP(SelectionDAG &DAG, SDValue Cond, SDValue True,
523 SDValue False, SDLoc DL) {
524 ConstantSDNode *CC = cast<ConstantSDNode>(Cond.getOperand(2));
525 bool invert = invertFPCondCodeUser((Mips::CondCode)CC->getSExtValue());
526 SDValue FCC0 = DAG.getRegister(Mips::FCC0, MVT::i32);
528 return DAG.getNode((invert ? MipsISD::CMovFP_F : MipsISD::CMovFP_T), DL,
529 True.getValueType(), True, FCC0, False, Cond);
532 static SDValue performSELECTCombine(SDNode *N, SelectionDAG &DAG,
533 TargetLowering::DAGCombinerInfo &DCI,
534 const MipsSubtarget *Subtarget) {
535 if (DCI.isBeforeLegalizeOps())
538 SDValue SetCC = N->getOperand(0);
540 if ((SetCC.getOpcode() != ISD::SETCC) ||
541 !SetCC.getOperand(0).getValueType().isInteger())
544 SDValue False = N->getOperand(2);
545 EVT FalseTy = False.getValueType();
547 if (!FalseTy.isInteger())
550 ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(False);
552 // If the RHS (False) is 0, we swap the order of the operands
553 // of ISD::SELECT (obviously also inverting the condition) so that we can
554 // take advantage of conditional moves using the $0 register.
556 // return (a != 0) ? x : 0;
564 if (!FalseC->getZExtValue()) {
565 ISD::CondCode CC = cast<CondCodeSDNode>(SetCC.getOperand(2))->get();
566 SDValue True = N->getOperand(1);
568 SetCC = DAG.getSetCC(DL, SetCC.getValueType(), SetCC.getOperand(0),
569 SetCC.getOperand(1), ISD::getSetCCInverse(CC, true));
571 return DAG.getNode(ISD::SELECT, DL, FalseTy, SetCC, False, True);
574 // If both operands are integer constants there's a possibility that we
575 // can do some interesting optimizations.
576 SDValue True = N->getOperand(1);
577 ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(True);
579 if (!TrueC || !True.getValueType().isInteger())
582 // We'll also ignore MVT::i64 operands as this optimizations proves
583 // to be ineffective because of the required sign extensions as the result
584 // of a SETCC operator is always MVT::i32 for non-vector types.
585 if (True.getValueType() == MVT::i64)
588 int64_t Diff = TrueC->getSExtValue() - FalseC->getSExtValue();
590 // 1) (a < x) ? y : y-1
592 // addiu $reg2, $reg1, y-1
594 return DAG.getNode(ISD::ADD, DL, SetCC.getValueType(), SetCC, False);
596 // 2) (a < x) ? y-1 : y
598 // xor $reg1, $reg1, 1
599 // addiu $reg2, $reg1, y-1
601 ISD::CondCode CC = cast<CondCodeSDNode>(SetCC.getOperand(2))->get();
602 SetCC = DAG.getSetCC(DL, SetCC.getValueType(), SetCC.getOperand(0),
603 SetCC.getOperand(1), ISD::getSetCCInverse(CC, true));
604 return DAG.getNode(ISD::ADD, DL, SetCC.getValueType(), SetCC, True);
607 // Couldn't optimize.
611 static SDValue performANDCombine(SDNode *N, SelectionDAG &DAG,
612 TargetLowering::DAGCombinerInfo &DCI,
613 const MipsSubtarget *Subtarget) {
614 // Pattern match EXT.
615 // $dst = and ((sra or srl) $src , pos), (2**size - 1)
616 // => ext $dst, $src, size, pos
617 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasExtractInsert())
620 SDValue ShiftRight = N->getOperand(0), Mask = N->getOperand(1);
621 unsigned ShiftRightOpc = ShiftRight.getOpcode();
623 // Op's first operand must be a shift right.
624 if (ShiftRightOpc != ISD::SRA && ShiftRightOpc != ISD::SRL)
627 // The second operand of the shift must be an immediate.
629 if (!(CN = dyn_cast<ConstantSDNode>(ShiftRight.getOperand(1))))
632 uint64_t Pos = CN->getZExtValue();
633 uint64_t SMPos, SMSize;
635 // Op's second operand must be a shifted mask.
636 if (!(CN = dyn_cast<ConstantSDNode>(Mask)) ||
637 !isShiftedMask(CN->getZExtValue(), SMPos, SMSize))
640 // Return if the shifted mask does not start at bit 0 or the sum of its size
641 // and Pos exceeds the word's size.
642 EVT ValTy = N->getValueType(0);
643 if (SMPos != 0 || Pos + SMSize > ValTy.getSizeInBits())
646 return DAG.getNode(MipsISD::Ext, SDLoc(N), ValTy,
647 ShiftRight.getOperand(0), DAG.getConstant(Pos, MVT::i32),
648 DAG.getConstant(SMSize, MVT::i32));
651 static SDValue performORCombine(SDNode *N, SelectionDAG &DAG,
652 TargetLowering::DAGCombinerInfo &DCI,
653 const MipsSubtarget *Subtarget) {
654 // Pattern match INS.
655 // $dst = or (and $src1 , mask0), (and (shl $src, pos), mask1),
656 // where mask1 = (2**size - 1) << pos, mask0 = ~mask1
657 // => ins $dst, $src, size, pos, $src1
658 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasExtractInsert())
661 SDValue And0 = N->getOperand(0), And1 = N->getOperand(1);
662 uint64_t SMPos0, SMSize0, SMPos1, SMSize1;
665 // See if Op's first operand matches (and $src1 , mask0).
666 if (And0.getOpcode() != ISD::AND)
669 if (!(CN = dyn_cast<ConstantSDNode>(And0.getOperand(1))) ||
670 !isShiftedMask(~CN->getSExtValue(), SMPos0, SMSize0))
673 // See if Op's second operand matches (and (shl $src, pos), mask1).
674 if (And1.getOpcode() != ISD::AND)
677 if (!(CN = dyn_cast<ConstantSDNode>(And1.getOperand(1))) ||
678 !isShiftedMask(CN->getZExtValue(), SMPos1, SMSize1))
681 // The shift masks must have the same position and size.
682 if (SMPos0 != SMPos1 || SMSize0 != SMSize1)
685 SDValue Shl = And1.getOperand(0);
686 if (Shl.getOpcode() != ISD::SHL)
689 if (!(CN = dyn_cast<ConstantSDNode>(Shl.getOperand(1))))
692 unsigned Shamt = CN->getZExtValue();
694 // Return if the shift amount and the first bit position of mask are not the
696 EVT ValTy = N->getValueType(0);
697 if ((Shamt != SMPos0) || (SMPos0 + SMSize0 > ValTy.getSizeInBits()))
700 return DAG.getNode(MipsISD::Ins, SDLoc(N), ValTy, Shl.getOperand(0),
701 DAG.getConstant(SMPos0, MVT::i32),
702 DAG.getConstant(SMSize0, MVT::i32), And0.getOperand(0));
705 static SDValue performADDCombine(SDNode *N, SelectionDAG &DAG,
706 TargetLowering::DAGCombinerInfo &DCI,
707 const MipsSubtarget *Subtarget) {
708 // (add v0, (add v1, abs_lo(tjt))) => (add (add v0, v1), abs_lo(tjt))
710 if (DCI.isBeforeLegalizeOps())
713 SDValue Add = N->getOperand(1);
715 if (Add.getOpcode() != ISD::ADD)
718 SDValue Lo = Add.getOperand(1);
720 if ((Lo.getOpcode() != MipsISD::Lo) ||
721 (Lo.getOperand(0).getOpcode() != ISD::TargetJumpTable))
724 EVT ValTy = N->getValueType(0);
727 SDValue Add1 = DAG.getNode(ISD::ADD, DL, ValTy, N->getOperand(0),
729 return DAG.getNode(ISD::ADD, DL, ValTy, Add1, Lo);
732 SDValue MipsTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI)
734 SelectionDAG &DAG = DCI.DAG;
735 unsigned Opc = N->getOpcode();
741 return performDivRemCombine(N, DAG, DCI, Subtarget);
743 return performSELECTCombine(N, DAG, DCI, Subtarget);
745 return performANDCombine(N, DAG, DCI, Subtarget);
747 return performORCombine(N, DAG, DCI, Subtarget);
749 return performADDCombine(N, DAG, DCI, Subtarget);
756 MipsTargetLowering::LowerOperationWrapper(SDNode *N,
757 SmallVectorImpl<SDValue> &Results,
758 SelectionDAG &DAG) const {
759 SDValue Res = LowerOperation(SDValue(N, 0), DAG);
761 for (unsigned I = 0, E = Res->getNumValues(); I != E; ++I)
762 Results.push_back(Res.getValue(I));
766 MipsTargetLowering::ReplaceNodeResults(SDNode *N,
767 SmallVectorImpl<SDValue> &Results,
768 SelectionDAG &DAG) const {
769 return LowerOperationWrapper(N, Results, DAG);
772 SDValue MipsTargetLowering::
773 LowerOperation(SDValue Op, SelectionDAG &DAG) const
775 switch (Op.getOpcode())
777 case ISD::BR_JT: return lowerBR_JT(Op, DAG);
778 case ISD::BRCOND: return lowerBRCOND(Op, DAG);
779 case ISD::ConstantPool: return lowerConstantPool(Op, DAG);
780 case ISD::GlobalAddress: return lowerGlobalAddress(Op, DAG);
781 case ISD::BlockAddress: return lowerBlockAddress(Op, DAG);
782 case ISD::GlobalTLSAddress: return lowerGlobalTLSAddress(Op, DAG);
783 case ISD::JumpTable: return lowerJumpTable(Op, DAG);
784 case ISD::SELECT: return lowerSELECT(Op, DAG);
785 case ISD::SELECT_CC: return lowerSELECT_CC(Op, DAG);
786 case ISD::SETCC: return lowerSETCC(Op, DAG);
787 case ISD::VASTART: return lowerVASTART(Op, DAG);
788 case ISD::FCOPYSIGN: return lowerFCOPYSIGN(Op, DAG);
789 case ISD::FRAMEADDR: return lowerFRAMEADDR(Op, DAG);
790 case ISD::RETURNADDR: return lowerRETURNADDR(Op, DAG);
791 case ISD::EH_RETURN: return lowerEH_RETURN(Op, DAG);
792 case ISD::ATOMIC_FENCE: return lowerATOMIC_FENCE(Op, DAG);
793 case ISD::SHL_PARTS: return lowerShiftLeftParts(Op, DAG);
794 case ISD::SRA_PARTS: return lowerShiftRightParts(Op, DAG, true);
795 case ISD::SRL_PARTS: return lowerShiftRightParts(Op, DAG, false);
796 case ISD::LOAD: return lowerLOAD(Op, DAG);
797 case ISD::STORE: return lowerSTORE(Op, DAG);
798 case ISD::ADD: return lowerADD(Op, DAG);
799 case ISD::FP_TO_SINT: return lowerFP_TO_SINT(Op, DAG);
804 //===----------------------------------------------------------------------===//
805 // Lower helper functions
806 //===----------------------------------------------------------------------===//
808 // addLiveIn - This helper function adds the specified physical register to the
809 // MachineFunction as a live in value. It also creates a corresponding
810 // virtual register for it.
812 addLiveIn(MachineFunction &MF, unsigned PReg, const TargetRegisterClass *RC)
814 unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
815 MF.getRegInfo().addLiveIn(PReg, VReg);
819 static MachineBasicBlock *insertDivByZeroTrap(MachineInstr *MI,
820 MachineBasicBlock &MBB,
821 const TargetInstrInfo &TII,
826 // Insert instruction "teq $divisor_reg, $zero, 7".
827 MachineBasicBlock::iterator I(MI);
828 MachineInstrBuilder MIB;
829 MachineOperand &Divisor = MI->getOperand(2);
830 MIB = BuildMI(MBB, std::next(I), MI->getDebugLoc(), TII.get(Mips::TEQ))
831 .addReg(Divisor.getReg(), getKillRegState(Divisor.isKill()))
832 .addReg(Mips::ZERO).addImm(7);
834 // Use the 32-bit sub-register if this is a 64-bit division.
836 MIB->getOperand(0).setSubReg(Mips::sub_32);
838 // Clear Divisor's kill flag.
839 Divisor.setIsKill(false);
841 // We would normally delete the original instruction here but in this case
842 // we only needed to inject an additional instruction rather than replace it.
848 MipsTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
849 MachineBasicBlock *BB) const {
850 switch (MI->getOpcode()) {
852 llvm_unreachable("Unexpected instr type to insert");
853 case Mips::ATOMIC_LOAD_ADD_I8:
854 return emitAtomicBinaryPartword(MI, BB, 1, Mips::ADDu);
855 case Mips::ATOMIC_LOAD_ADD_I16:
856 return emitAtomicBinaryPartword(MI, BB, 2, Mips::ADDu);
857 case Mips::ATOMIC_LOAD_ADD_I32:
858 return emitAtomicBinary(MI, BB, 4, Mips::ADDu);
859 case Mips::ATOMIC_LOAD_ADD_I64:
860 return emitAtomicBinary(MI, BB, 8, Mips::DADDu);
862 case Mips::ATOMIC_LOAD_AND_I8:
863 return emitAtomicBinaryPartword(MI, BB, 1, Mips::AND);
864 case Mips::ATOMIC_LOAD_AND_I16:
865 return emitAtomicBinaryPartword(MI, BB, 2, Mips::AND);
866 case Mips::ATOMIC_LOAD_AND_I32:
867 return emitAtomicBinary(MI, BB, 4, Mips::AND);
868 case Mips::ATOMIC_LOAD_AND_I64:
869 return emitAtomicBinary(MI, BB, 8, Mips::AND64);
871 case Mips::ATOMIC_LOAD_OR_I8:
872 return emitAtomicBinaryPartword(MI, BB, 1, Mips::OR);
873 case Mips::ATOMIC_LOAD_OR_I16:
874 return emitAtomicBinaryPartword(MI, BB, 2, Mips::OR);
875 case Mips::ATOMIC_LOAD_OR_I32:
876 return emitAtomicBinary(MI, BB, 4, Mips::OR);
877 case Mips::ATOMIC_LOAD_OR_I64:
878 return emitAtomicBinary(MI, BB, 8, Mips::OR64);
880 case Mips::ATOMIC_LOAD_XOR_I8:
881 return emitAtomicBinaryPartword(MI, BB, 1, Mips::XOR);
882 case Mips::ATOMIC_LOAD_XOR_I16:
883 return emitAtomicBinaryPartword(MI, BB, 2, Mips::XOR);
884 case Mips::ATOMIC_LOAD_XOR_I32:
885 return emitAtomicBinary(MI, BB, 4, Mips::XOR);
886 case Mips::ATOMIC_LOAD_XOR_I64:
887 return emitAtomicBinary(MI, BB, 8, Mips::XOR64);
889 case Mips::ATOMIC_LOAD_NAND_I8:
890 return emitAtomicBinaryPartword(MI, BB, 1, 0, true);
891 case Mips::ATOMIC_LOAD_NAND_I16:
892 return emitAtomicBinaryPartword(MI, BB, 2, 0, true);
893 case Mips::ATOMIC_LOAD_NAND_I32:
894 return emitAtomicBinary(MI, BB, 4, 0, true);
895 case Mips::ATOMIC_LOAD_NAND_I64:
896 return emitAtomicBinary(MI, BB, 8, 0, true);
898 case Mips::ATOMIC_LOAD_SUB_I8:
899 return emitAtomicBinaryPartword(MI, BB, 1, Mips::SUBu);
900 case Mips::ATOMIC_LOAD_SUB_I16:
901 return emitAtomicBinaryPartword(MI, BB, 2, Mips::SUBu);
902 case Mips::ATOMIC_LOAD_SUB_I32:
903 return emitAtomicBinary(MI, BB, 4, Mips::SUBu);
904 case Mips::ATOMIC_LOAD_SUB_I64:
905 return emitAtomicBinary(MI, BB, 8, Mips::DSUBu);
907 case Mips::ATOMIC_SWAP_I8:
908 return emitAtomicBinaryPartword(MI, BB, 1, 0);
909 case Mips::ATOMIC_SWAP_I16:
910 return emitAtomicBinaryPartword(MI, BB, 2, 0);
911 case Mips::ATOMIC_SWAP_I32:
912 return emitAtomicBinary(MI, BB, 4, 0);
913 case Mips::ATOMIC_SWAP_I64:
914 return emitAtomicBinary(MI, BB, 8, 0);
916 case Mips::ATOMIC_CMP_SWAP_I8:
917 return emitAtomicCmpSwapPartword(MI, BB, 1);
918 case Mips::ATOMIC_CMP_SWAP_I16:
919 return emitAtomicCmpSwapPartword(MI, BB, 2);
920 case Mips::ATOMIC_CMP_SWAP_I32:
921 return emitAtomicCmpSwap(MI, BB, 4);
922 case Mips::ATOMIC_CMP_SWAP_I64:
923 return emitAtomicCmpSwap(MI, BB, 8);
924 case Mips::PseudoSDIV:
925 case Mips::PseudoUDIV:
930 return insertDivByZeroTrap(MI, *BB, *getTargetMachine().getInstrInfo(),
932 case Mips::PseudoDSDIV:
933 case Mips::PseudoDUDIV:
938 return insertDivByZeroTrap(MI, *BB, *getTargetMachine().getInstrInfo(),
941 return emitSEL_D(MI, BB);
945 // This function also handles Mips::ATOMIC_SWAP_I32 (when BinOpcode == 0), and
946 // Mips::ATOMIC_LOAD_NAND_I32 (when Nand == true)
948 MipsTargetLowering::emitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
949 unsigned Size, unsigned BinOpcode,
951 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicBinary.");
953 MachineFunction *MF = BB->getParent();
954 MachineRegisterInfo &RegInfo = MF->getRegInfo();
955 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
956 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
957 DebugLoc DL = MI->getDebugLoc();
958 unsigned LL, SC, AND, NOR, ZERO, BEQ;
965 LL = Subtarget->hasMips32r6() ? Mips::LL : Mips::LL_R6;
966 SC = Subtarget->hasMips32r6() ? Mips::SC : Mips::SC_R6;
973 LL = Subtarget->hasMips64r6() ? Mips::LLD : Mips::LLD_R6;
974 SC = Subtarget->hasMips64r6() ? Mips::SCD : Mips::SCD_R6;
977 ZERO = Mips::ZERO_64;
981 unsigned OldVal = MI->getOperand(0).getReg();
982 unsigned Ptr = MI->getOperand(1).getReg();
983 unsigned Incr = MI->getOperand(2).getReg();
985 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
986 unsigned AndRes = RegInfo.createVirtualRegister(RC);
987 unsigned Success = RegInfo.createVirtualRegister(RC);
989 // insert new blocks after the current block
990 const BasicBlock *LLVM_BB = BB->getBasicBlock();
991 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
992 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
993 MachineFunction::iterator It = BB;
995 MF->insert(It, loopMBB);
996 MF->insert(It, exitMBB);
998 // Transfer the remainder of BB and its successor edges to exitMBB.
999 exitMBB->splice(exitMBB->begin(), BB,
1000 std::next(MachineBasicBlock::iterator(MI)), BB->end());
1001 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1005 // fallthrough --> loopMBB
1006 BB->addSuccessor(loopMBB);
1007 loopMBB->addSuccessor(loopMBB);
1008 loopMBB->addSuccessor(exitMBB);
1011 // ll oldval, 0(ptr)
1012 // <binop> storeval, oldval, incr
1013 // sc success, storeval, 0(ptr)
1014 // beq success, $0, loopMBB
1016 BuildMI(BB, DL, TII->get(LL), OldVal).addReg(Ptr).addImm(0);
1018 // and andres, oldval, incr
1019 // nor storeval, $0, andres
1020 BuildMI(BB, DL, TII->get(AND), AndRes).addReg(OldVal).addReg(Incr);
1021 BuildMI(BB, DL, TII->get(NOR), StoreVal).addReg(ZERO).addReg(AndRes);
1022 } else if (BinOpcode) {
1023 // <binop> storeval, oldval, incr
1024 BuildMI(BB, DL, TII->get(BinOpcode), StoreVal).addReg(OldVal).addReg(Incr);
1028 BuildMI(BB, DL, TII->get(SC), Success).addReg(StoreVal).addReg(Ptr).addImm(0);
1029 BuildMI(BB, DL, TII->get(BEQ)).addReg(Success).addReg(ZERO).addMBB(loopMBB);
1031 MI->eraseFromParent(); // The instruction is gone now.
1036 MachineBasicBlock *MipsTargetLowering::emitSignExtendToI32InReg(
1037 MachineInstr *MI, MachineBasicBlock *BB, unsigned Size, unsigned DstReg,
1038 unsigned SrcReg) const {
1039 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1040 DebugLoc DL = MI->getDebugLoc();
1042 if (Subtarget->hasMips32r2() && Size == 1) {
1043 BuildMI(BB, DL, TII->get(Mips::SEB), DstReg).addReg(SrcReg);
1047 if (Subtarget->hasMips32r2() && Size == 2) {
1048 BuildMI(BB, DL, TII->get(Mips::SEH), DstReg).addReg(SrcReg);
1052 MachineFunction *MF = BB->getParent();
1053 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1054 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1055 unsigned ScrReg = RegInfo.createVirtualRegister(RC);
1058 int64_t ShiftImm = 32 - (Size * 8);
1060 BuildMI(BB, DL, TII->get(Mips::SLL), ScrReg).addReg(SrcReg).addImm(ShiftImm);
1061 BuildMI(BB, DL, TII->get(Mips::SRA), DstReg).addReg(ScrReg).addImm(ShiftImm);
1066 MachineBasicBlock *MipsTargetLowering::emitAtomicBinaryPartword(
1067 MachineInstr *MI, MachineBasicBlock *BB, unsigned Size, unsigned BinOpcode,
1069 assert((Size == 1 || Size == 2) &&
1070 "Unsupported size for EmitAtomicBinaryPartial.");
1072 MachineFunction *MF = BB->getParent();
1073 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1074 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1075 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1076 DebugLoc DL = MI->getDebugLoc();
1078 unsigned Dest = MI->getOperand(0).getReg();
1079 unsigned Ptr = MI->getOperand(1).getReg();
1080 unsigned Incr = MI->getOperand(2).getReg();
1082 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1083 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1084 unsigned Mask = RegInfo.createVirtualRegister(RC);
1085 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1086 unsigned NewVal = RegInfo.createVirtualRegister(RC);
1087 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1088 unsigned Incr2 = RegInfo.createVirtualRegister(RC);
1089 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1090 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1091 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1092 unsigned AndRes = RegInfo.createVirtualRegister(RC);
1093 unsigned BinOpRes = RegInfo.createVirtualRegister(RC);
1094 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1095 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1096 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1097 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1098 unsigned Success = RegInfo.createVirtualRegister(RC);
1100 // insert new blocks after the current block
1101 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1102 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1103 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1104 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1105 MachineFunction::iterator It = BB;
1107 MF->insert(It, loopMBB);
1108 MF->insert(It, sinkMBB);
1109 MF->insert(It, exitMBB);
1111 // Transfer the remainder of BB and its successor edges to exitMBB.
1112 exitMBB->splice(exitMBB->begin(), BB,
1113 std::next(MachineBasicBlock::iterator(MI)), BB->end());
1114 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1116 BB->addSuccessor(loopMBB);
1117 loopMBB->addSuccessor(loopMBB);
1118 loopMBB->addSuccessor(sinkMBB);
1119 sinkMBB->addSuccessor(exitMBB);
1122 // addiu masklsb2,$0,-4 # 0xfffffffc
1123 // and alignedaddr,ptr,masklsb2
1124 // andi ptrlsb2,ptr,3
1125 // sll shiftamt,ptrlsb2,3
1126 // ori maskupper,$0,255 # 0xff
1127 // sll mask,maskupper,shiftamt
1128 // nor mask2,$0,mask
1129 // sll incr2,incr,shiftamt
1131 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1132 BuildMI(BB, DL, TII->get(Mips::ADDiu), MaskLSB2)
1133 .addReg(Mips::ZERO).addImm(-4);
1134 BuildMI(BB, DL, TII->get(Mips::AND), AlignedAddr)
1135 .addReg(Ptr).addReg(MaskLSB2);
1136 BuildMI(BB, DL, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1137 if (Subtarget->isLittle()) {
1138 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1140 unsigned Off = RegInfo.createVirtualRegister(RC);
1141 BuildMI(BB, DL, TII->get(Mips::XORi), Off)
1142 .addReg(PtrLSB2).addImm((Size == 1) ? 3 : 2);
1143 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(Off).addImm(3);
1145 BuildMI(BB, DL, TII->get(Mips::ORi), MaskUpper)
1146 .addReg(Mips::ZERO).addImm(MaskImm);
1147 BuildMI(BB, DL, TII->get(Mips::SLLV), Mask)
1148 .addReg(MaskUpper).addReg(ShiftAmt);
1149 BuildMI(BB, DL, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1150 BuildMI(BB, DL, TII->get(Mips::SLLV), Incr2).addReg(Incr).addReg(ShiftAmt);
1152 // atomic.load.binop
1154 // ll oldval,0(alignedaddr)
1155 // binop binopres,oldval,incr2
1156 // and newval,binopres,mask
1157 // and maskedoldval0,oldval,mask2
1158 // or storeval,maskedoldval0,newval
1159 // sc success,storeval,0(alignedaddr)
1160 // beq success,$0,loopMBB
1164 // ll oldval,0(alignedaddr)
1165 // and newval,incr2,mask
1166 // and maskedoldval0,oldval,mask2
1167 // or storeval,maskedoldval0,newval
1168 // sc success,storeval,0(alignedaddr)
1169 // beq success,$0,loopMBB
1172 BuildMI(BB, DL, TII->get(Mips::LL), OldVal).addReg(AlignedAddr).addImm(0);
1174 // and andres, oldval, incr2
1175 // nor binopres, $0, andres
1176 // and newval, binopres, mask
1177 BuildMI(BB, DL, TII->get(Mips::AND), AndRes).addReg(OldVal).addReg(Incr2);
1178 BuildMI(BB, DL, TII->get(Mips::NOR), BinOpRes)
1179 .addReg(Mips::ZERO).addReg(AndRes);
1180 BuildMI(BB, DL, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1181 } else if (BinOpcode) {
1182 // <binop> binopres, oldval, incr2
1183 // and newval, binopres, mask
1184 BuildMI(BB, DL, TII->get(BinOpcode), BinOpRes).addReg(OldVal).addReg(Incr2);
1185 BuildMI(BB, DL, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1186 } else { // atomic.swap
1187 // and newval, incr2, mask
1188 BuildMI(BB, DL, TII->get(Mips::AND), NewVal).addReg(Incr2).addReg(Mask);
1191 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal0)
1192 .addReg(OldVal).addReg(Mask2);
1193 BuildMI(BB, DL, TII->get(Mips::OR), StoreVal)
1194 .addReg(MaskedOldVal0).addReg(NewVal);
1195 BuildMI(BB, DL, TII->get(Mips::SC), Success)
1196 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1197 BuildMI(BB, DL, TII->get(Mips::BEQ))
1198 .addReg(Success).addReg(Mips::ZERO).addMBB(loopMBB);
1201 // and maskedoldval1,oldval,mask
1202 // srl srlres,maskedoldval1,shiftamt
1203 // sign_extend dest,srlres
1206 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal1)
1207 .addReg(OldVal).addReg(Mask);
1208 BuildMI(BB, DL, TII->get(Mips::SRLV), SrlRes)
1209 .addReg(MaskedOldVal1).addReg(ShiftAmt);
1210 BB = emitSignExtendToI32InReg(MI, BB, Size, Dest, SrlRes);
1212 MI->eraseFromParent(); // The instruction is gone now.
1217 MachineBasicBlock * MipsTargetLowering::emitAtomicCmpSwap(MachineInstr *MI,
1218 MachineBasicBlock *BB,
1219 unsigned Size) const {
1220 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicCmpSwap.");
1222 MachineFunction *MF = BB->getParent();
1223 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1224 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
1225 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1226 DebugLoc DL = MI->getDebugLoc();
1227 unsigned LL, SC, ZERO, BNE, BEQ;
1230 LL = isMicroMips ? Mips::LL_MM : Mips::LL;
1231 SC = isMicroMips ? Mips::SC_MM : Mips::SC;
1238 ZERO = Mips::ZERO_64;
1243 unsigned Dest = MI->getOperand(0).getReg();
1244 unsigned Ptr = MI->getOperand(1).getReg();
1245 unsigned OldVal = MI->getOperand(2).getReg();
1246 unsigned NewVal = MI->getOperand(3).getReg();
1248 unsigned Success = RegInfo.createVirtualRegister(RC);
1250 // insert new blocks after the current block
1251 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1252 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1253 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1254 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1255 MachineFunction::iterator It = BB;
1257 MF->insert(It, loop1MBB);
1258 MF->insert(It, loop2MBB);
1259 MF->insert(It, exitMBB);
1261 // Transfer the remainder of BB and its successor edges to exitMBB.
1262 exitMBB->splice(exitMBB->begin(), BB,
1263 std::next(MachineBasicBlock::iterator(MI)), BB->end());
1264 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1268 // fallthrough --> loop1MBB
1269 BB->addSuccessor(loop1MBB);
1270 loop1MBB->addSuccessor(exitMBB);
1271 loop1MBB->addSuccessor(loop2MBB);
1272 loop2MBB->addSuccessor(loop1MBB);
1273 loop2MBB->addSuccessor(exitMBB);
1277 // bne dest, oldval, exitMBB
1279 BuildMI(BB, DL, TII->get(LL), Dest).addReg(Ptr).addImm(0);
1280 BuildMI(BB, DL, TII->get(BNE))
1281 .addReg(Dest).addReg(OldVal).addMBB(exitMBB);
1284 // sc success, newval, 0(ptr)
1285 // beq success, $0, loop1MBB
1287 BuildMI(BB, DL, TII->get(SC), Success)
1288 .addReg(NewVal).addReg(Ptr).addImm(0);
1289 BuildMI(BB, DL, TII->get(BEQ))
1290 .addReg(Success).addReg(ZERO).addMBB(loop1MBB);
1292 MI->eraseFromParent(); // The instruction is gone now.
1298 MipsTargetLowering::emitAtomicCmpSwapPartword(MachineInstr *MI,
1299 MachineBasicBlock *BB,
1300 unsigned Size) const {
1301 assert((Size == 1 || Size == 2) &&
1302 "Unsupported size for EmitAtomicCmpSwapPartial.");
1304 MachineFunction *MF = BB->getParent();
1305 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1306 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1307 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1308 DebugLoc DL = MI->getDebugLoc();
1310 unsigned Dest = MI->getOperand(0).getReg();
1311 unsigned Ptr = MI->getOperand(1).getReg();
1312 unsigned CmpVal = MI->getOperand(2).getReg();
1313 unsigned NewVal = MI->getOperand(3).getReg();
1315 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1316 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1317 unsigned Mask = RegInfo.createVirtualRegister(RC);
1318 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1319 unsigned ShiftedCmpVal = RegInfo.createVirtualRegister(RC);
1320 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1321 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1322 unsigned ShiftedNewVal = RegInfo.createVirtualRegister(RC);
1323 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1324 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1325 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1326 unsigned MaskedCmpVal = RegInfo.createVirtualRegister(RC);
1327 unsigned MaskedNewVal = RegInfo.createVirtualRegister(RC);
1328 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1329 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1330 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1331 unsigned Success = RegInfo.createVirtualRegister(RC);
1333 // insert new blocks after the current block
1334 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1335 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1336 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1337 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1338 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1339 MachineFunction::iterator It = BB;
1341 MF->insert(It, loop1MBB);
1342 MF->insert(It, loop2MBB);
1343 MF->insert(It, sinkMBB);
1344 MF->insert(It, exitMBB);
1346 // Transfer the remainder of BB and its successor edges to exitMBB.
1347 exitMBB->splice(exitMBB->begin(), BB,
1348 std::next(MachineBasicBlock::iterator(MI)), BB->end());
1349 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1351 BB->addSuccessor(loop1MBB);
1352 loop1MBB->addSuccessor(sinkMBB);
1353 loop1MBB->addSuccessor(loop2MBB);
1354 loop2MBB->addSuccessor(loop1MBB);
1355 loop2MBB->addSuccessor(sinkMBB);
1356 sinkMBB->addSuccessor(exitMBB);
1358 // FIXME: computation of newval2 can be moved to loop2MBB.
1360 // addiu masklsb2,$0,-4 # 0xfffffffc
1361 // and alignedaddr,ptr,masklsb2
1362 // andi ptrlsb2,ptr,3
1363 // sll shiftamt,ptrlsb2,3
1364 // ori maskupper,$0,255 # 0xff
1365 // sll mask,maskupper,shiftamt
1366 // nor mask2,$0,mask
1367 // andi maskedcmpval,cmpval,255
1368 // sll shiftedcmpval,maskedcmpval,shiftamt
1369 // andi maskednewval,newval,255
1370 // sll shiftednewval,maskednewval,shiftamt
1371 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1372 BuildMI(BB, DL, TII->get(Mips::ADDiu), MaskLSB2)
1373 .addReg(Mips::ZERO).addImm(-4);
1374 BuildMI(BB, DL, TII->get(Mips::AND), AlignedAddr)
1375 .addReg(Ptr).addReg(MaskLSB2);
1376 BuildMI(BB, DL, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1377 if (Subtarget->isLittle()) {
1378 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1380 unsigned Off = RegInfo.createVirtualRegister(RC);
1381 BuildMI(BB, DL, TII->get(Mips::XORi), Off)
1382 .addReg(PtrLSB2).addImm((Size == 1) ? 3 : 2);
1383 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(Off).addImm(3);
1385 BuildMI(BB, DL, TII->get(Mips::ORi), MaskUpper)
1386 .addReg(Mips::ZERO).addImm(MaskImm);
1387 BuildMI(BB, DL, TII->get(Mips::SLLV), Mask)
1388 .addReg(MaskUpper).addReg(ShiftAmt);
1389 BuildMI(BB, DL, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1390 BuildMI(BB, DL, TII->get(Mips::ANDi), MaskedCmpVal)
1391 .addReg(CmpVal).addImm(MaskImm);
1392 BuildMI(BB, DL, TII->get(Mips::SLLV), ShiftedCmpVal)
1393 .addReg(MaskedCmpVal).addReg(ShiftAmt);
1394 BuildMI(BB, DL, TII->get(Mips::ANDi), MaskedNewVal)
1395 .addReg(NewVal).addImm(MaskImm);
1396 BuildMI(BB, DL, TII->get(Mips::SLLV), ShiftedNewVal)
1397 .addReg(MaskedNewVal).addReg(ShiftAmt);
1400 // ll oldval,0(alginedaddr)
1401 // and maskedoldval0,oldval,mask
1402 // bne maskedoldval0,shiftedcmpval,sinkMBB
1404 BuildMI(BB, DL, TII->get(Mips::LL), OldVal).addReg(AlignedAddr).addImm(0);
1405 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal0)
1406 .addReg(OldVal).addReg(Mask);
1407 BuildMI(BB, DL, TII->get(Mips::BNE))
1408 .addReg(MaskedOldVal0).addReg(ShiftedCmpVal).addMBB(sinkMBB);
1411 // and maskedoldval1,oldval,mask2
1412 // or storeval,maskedoldval1,shiftednewval
1413 // sc success,storeval,0(alignedaddr)
1414 // beq success,$0,loop1MBB
1416 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal1)
1417 .addReg(OldVal).addReg(Mask2);
1418 BuildMI(BB, DL, TII->get(Mips::OR), StoreVal)
1419 .addReg(MaskedOldVal1).addReg(ShiftedNewVal);
1420 BuildMI(BB, DL, TII->get(Mips::SC), Success)
1421 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1422 BuildMI(BB, DL, TII->get(Mips::BEQ))
1423 .addReg(Success).addReg(Mips::ZERO).addMBB(loop1MBB);
1426 // srl srlres,maskedoldval0,shiftamt
1427 // sign_extend dest,srlres
1430 BuildMI(BB, DL, TII->get(Mips::SRLV), SrlRes)
1431 .addReg(MaskedOldVal0).addReg(ShiftAmt);
1432 BB = emitSignExtendToI32InReg(MI, BB, Size, Dest, SrlRes);
1434 MI->eraseFromParent(); // The instruction is gone now.
1439 MachineBasicBlock *MipsTargetLowering::emitSEL_D(MachineInstr *MI,
1440 MachineBasicBlock *BB) const {
1441 MachineFunction *MF = BB->getParent();
1442 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
1443 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1444 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1445 DebugLoc DL = MI->getDebugLoc();
1446 MachineBasicBlock::iterator II(MI);
1448 unsigned Fc = MI->getOperand(1).getReg();
1449 const auto &FGR64RegClass = TRI->getRegClass(Mips::FGR64RegClassID);
1451 unsigned Fc2 = RegInfo.createVirtualRegister(FGR64RegClass);
1453 BuildMI(*BB, II, DL, TII->get(Mips::SUBREG_TO_REG), Fc2)
1456 .addImm(Mips::sub_lo);
1458 // We don't erase the original instruction, we just replace the condition
1459 // register with the 64-bit super-register.
1460 MI->getOperand(1).setReg(Fc2);
1465 //===----------------------------------------------------------------------===//
1466 // Misc Lower Operation implementation
1467 //===----------------------------------------------------------------------===//
1468 SDValue MipsTargetLowering::lowerBR_JT(SDValue Op, SelectionDAG &DAG) const {
1469 SDValue Chain = Op.getOperand(0);
1470 SDValue Table = Op.getOperand(1);
1471 SDValue Index = Op.getOperand(2);
1473 EVT PTy = getPointerTy();
1474 unsigned EntrySize =
1475 DAG.getMachineFunction().getJumpTableInfo()->getEntrySize(*getDataLayout());
1477 Index = DAG.getNode(ISD::MUL, DL, PTy, Index,
1478 DAG.getConstant(EntrySize, PTy));
1479 SDValue Addr = DAG.getNode(ISD::ADD, DL, PTy, Index, Table);
1481 EVT MemVT = EVT::getIntegerVT(*DAG.getContext(), EntrySize * 8);
1482 Addr = DAG.getExtLoad(ISD::SEXTLOAD, DL, PTy, Chain, Addr,
1483 MachinePointerInfo::getJumpTable(), MemVT, false, false,
1485 Chain = Addr.getValue(1);
1487 if ((getTargetMachine().getRelocationModel() == Reloc::PIC_) || isN64()) {
1488 // For PIC, the sequence is:
1489 // BRIND(load(Jumptable + index) + RelocBase)
1490 // RelocBase can be JumpTable, GOT or some sort of global base.
1491 Addr = DAG.getNode(ISD::ADD, DL, PTy, Addr,
1492 getPICJumpTableRelocBase(Table, DAG));
1495 return DAG.getNode(ISD::BRIND, DL, MVT::Other, Chain, Addr);
1498 SDValue MipsTargetLowering::lowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
1499 // The first operand is the chain, the second is the condition, the third is
1500 // the block to branch to if the condition is true.
1501 SDValue Chain = Op.getOperand(0);
1502 SDValue Dest = Op.getOperand(2);
1505 assert(!Subtarget->hasMips32r6() && !Subtarget->hasMips64r6());
1506 SDValue CondRes = createFPCmp(DAG, Op.getOperand(1));
1508 // Return if flag is not set by a floating point comparison.
1509 if (CondRes.getOpcode() != MipsISD::FPCmp)
1512 SDValue CCNode = CondRes.getOperand(2);
1514 (Mips::CondCode)cast<ConstantSDNode>(CCNode)->getZExtValue();
1515 unsigned Opc = invertFPCondCodeUser(CC) ? Mips::BRANCH_F : Mips::BRANCH_T;
1516 SDValue BrCode = DAG.getConstant(Opc, MVT::i32);
1517 SDValue FCC0 = DAG.getRegister(Mips::FCC0, MVT::i32);
1518 return DAG.getNode(MipsISD::FPBrcond, DL, Op.getValueType(), Chain, BrCode,
1519 FCC0, Dest, CondRes);
1522 SDValue MipsTargetLowering::
1523 lowerSELECT(SDValue Op, SelectionDAG &DAG) const
1525 assert(!Subtarget->hasMips32r6() && !Subtarget->hasMips64r6());
1526 SDValue Cond = createFPCmp(DAG, Op.getOperand(0));
1528 // Return if flag is not set by a floating point comparison.
1529 if (Cond.getOpcode() != MipsISD::FPCmp)
1532 return createCMovFP(DAG, Cond, Op.getOperand(1), Op.getOperand(2),
1536 SDValue MipsTargetLowering::
1537 lowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const
1540 EVT Ty = Op.getOperand(0).getValueType();
1541 SDValue Cond = DAG.getNode(ISD::SETCC, DL,
1542 getSetCCResultType(*DAG.getContext(), Ty),
1543 Op.getOperand(0), Op.getOperand(1),
1546 return DAG.getNode(ISD::SELECT, DL, Op.getValueType(), Cond, Op.getOperand(2),
1550 SDValue MipsTargetLowering::lowerSETCC(SDValue Op, SelectionDAG &DAG) const {
1551 assert(!Subtarget->hasMips32r6() && !Subtarget->hasMips64r6());
1552 SDValue Cond = createFPCmp(DAG, Op);
1554 assert(Cond.getOpcode() == MipsISD::FPCmp &&
1555 "Floating point operand expected.");
1557 SDValue True = DAG.getConstant(1, MVT::i32);
1558 SDValue False = DAG.getConstant(0, MVT::i32);
1560 return createCMovFP(DAG, Cond, True, False, SDLoc(Op));
1563 SDValue MipsTargetLowering::lowerGlobalAddress(SDValue Op,
1564 SelectionDAG &DAG) const {
1565 // FIXME there isn't actually debug info here
1567 EVT Ty = Op.getValueType();
1568 GlobalAddressSDNode *N = cast<GlobalAddressSDNode>(Op);
1569 const GlobalValue *GV = N->getGlobal();
1571 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !isN64()) {
1572 const MipsTargetObjectFile &TLOF =
1573 (const MipsTargetObjectFile&)getObjFileLowering();
1575 // %gp_rel relocation
1576 if (TLOF.IsGlobalInSmallSection(GV, getTargetMachine())) {
1577 SDValue GA = DAG.getTargetGlobalAddress(GV, DL, MVT::i32, 0,
1579 SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, DL,
1580 DAG.getVTList(MVT::i32), GA);
1581 SDValue GPReg = DAG.getRegister(Mips::GP, MVT::i32);
1582 return DAG.getNode(ISD::ADD, DL, MVT::i32, GPReg, GPRelNode);
1585 // %hi/%lo relocation
1586 return getAddrNonPIC(N, Ty, DAG);
1589 if (GV->hasInternalLinkage() || (GV->hasLocalLinkage() && !isa<Function>(GV)))
1590 return getAddrLocal(N, Ty, DAG, isN32() || isN64());
1593 return getAddrGlobalLargeGOT(N, Ty, DAG, MipsII::MO_GOT_HI16,
1594 MipsII::MO_GOT_LO16, DAG.getEntryNode(),
1595 MachinePointerInfo::getGOT());
1597 return getAddrGlobal(N, Ty, DAG, (isN32() || isN64()) ? MipsII::MO_GOT_DISP
1599 DAG.getEntryNode(), MachinePointerInfo::getGOT());
1602 SDValue MipsTargetLowering::lowerBlockAddress(SDValue Op,
1603 SelectionDAG &DAG) const {
1604 BlockAddressSDNode *N = cast<BlockAddressSDNode>(Op);
1605 EVT Ty = Op.getValueType();
1607 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !isN64())
1608 return getAddrNonPIC(N, Ty, DAG);
1610 return getAddrLocal(N, Ty, DAG, isN32() || isN64());
1613 SDValue MipsTargetLowering::
1614 lowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const
1616 // If the relocation model is PIC, use the General Dynamic TLS Model or
1617 // Local Dynamic TLS model, otherwise use the Initial Exec or
1618 // Local Exec TLS Model.
1620 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
1622 const GlobalValue *GV = GA->getGlobal();
1623 EVT PtrVT = getPointerTy();
1625 TLSModel::Model model = getTargetMachine().getTLSModel(GV);
1627 if (model == TLSModel::GeneralDynamic || model == TLSModel::LocalDynamic) {
1628 // General Dynamic and Local Dynamic TLS Model.
1629 unsigned Flag = (model == TLSModel::LocalDynamic) ? MipsII::MO_TLSLDM
1632 SDValue TGA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, Flag);
1633 SDValue Argument = DAG.getNode(MipsISD::Wrapper, DL, PtrVT,
1634 getGlobalReg(DAG, PtrVT), TGA);
1635 unsigned PtrSize = PtrVT.getSizeInBits();
1636 IntegerType *PtrTy = Type::getIntNTy(*DAG.getContext(), PtrSize);
1638 SDValue TlsGetAddr = DAG.getExternalSymbol("__tls_get_addr", PtrVT);
1642 Entry.Node = Argument;
1644 Args.push_back(Entry);
1646 TargetLowering::CallLoweringInfo CLI(DAG);
1647 CLI.setDebugLoc(DL).setChain(DAG.getEntryNode())
1648 .setCallee(CallingConv::C, PtrTy, TlsGetAddr, std::move(Args), 0);
1649 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
1651 SDValue Ret = CallResult.first;
1653 if (model != TLSModel::LocalDynamic)
1656 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1657 MipsII::MO_DTPREL_HI);
1658 SDValue Hi = DAG.getNode(MipsISD::Hi, DL, PtrVT, TGAHi);
1659 SDValue TGALo = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1660 MipsII::MO_DTPREL_LO);
1661 SDValue Lo = DAG.getNode(MipsISD::Lo, DL, PtrVT, TGALo);
1662 SDValue Add = DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Ret);
1663 return DAG.getNode(ISD::ADD, DL, PtrVT, Add, Lo);
1667 if (model == TLSModel::InitialExec) {
1668 // Initial Exec TLS Model
1669 SDValue TGA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1670 MipsII::MO_GOTTPREL);
1671 TGA = DAG.getNode(MipsISD::Wrapper, DL, PtrVT, getGlobalReg(DAG, PtrVT),
1673 Offset = DAG.getLoad(PtrVT, DL,
1674 DAG.getEntryNode(), TGA, MachinePointerInfo(),
1675 false, false, false, 0);
1677 // Local Exec TLS Model
1678 assert(model == TLSModel::LocalExec);
1679 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1680 MipsII::MO_TPREL_HI);
1681 SDValue TGALo = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1682 MipsII::MO_TPREL_LO);
1683 SDValue Hi = DAG.getNode(MipsISD::Hi, DL, PtrVT, TGAHi);
1684 SDValue Lo = DAG.getNode(MipsISD::Lo, DL, PtrVT, TGALo);
1685 Offset = DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
1688 SDValue ThreadPointer = DAG.getNode(MipsISD::ThreadPointer, DL, PtrVT);
1689 return DAG.getNode(ISD::ADD, DL, PtrVT, ThreadPointer, Offset);
1692 SDValue MipsTargetLowering::
1693 lowerJumpTable(SDValue Op, SelectionDAG &DAG) const
1695 JumpTableSDNode *N = cast<JumpTableSDNode>(Op);
1696 EVT Ty = Op.getValueType();
1698 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !isN64())
1699 return getAddrNonPIC(N, Ty, DAG);
1701 return getAddrLocal(N, Ty, DAG, isN32() || isN64());
1704 SDValue MipsTargetLowering::
1705 lowerConstantPool(SDValue Op, SelectionDAG &DAG) const
1707 // gp_rel relocation
1708 // FIXME: we should reference the constant pool using small data sections,
1709 // but the asm printer currently doesn't support this feature without
1710 // hacking it. This feature should come soon so we can uncomment the
1712 //if (IsInSmallSection(C->getType())) {
1713 // SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, MVT::i32, CP);
1714 // SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
1715 // ResNode = DAG.getNode(ISD::ADD, MVT::i32, GOT, GPRelNode);
1716 ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
1717 EVT Ty = Op.getValueType();
1719 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !isN64())
1720 return getAddrNonPIC(N, Ty, DAG);
1722 return getAddrLocal(N, Ty, DAG, isN32() || isN64());
1725 SDValue MipsTargetLowering::lowerVASTART(SDValue Op, SelectionDAG &DAG) const {
1726 MachineFunction &MF = DAG.getMachineFunction();
1727 MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
1730 SDValue FI = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
1733 // vastart just stores the address of the VarArgsFrameIndex slot into the
1734 // memory location argument.
1735 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
1736 return DAG.getStore(Op.getOperand(0), DL, FI, Op.getOperand(1),
1737 MachinePointerInfo(SV), false, false, 0);
1740 static SDValue lowerFCOPYSIGN32(SDValue Op, SelectionDAG &DAG,
1741 bool HasExtractInsert) {
1742 EVT TyX = Op.getOperand(0).getValueType();
1743 EVT TyY = Op.getOperand(1).getValueType();
1744 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1745 SDValue Const31 = DAG.getConstant(31, MVT::i32);
1749 // If operand is of type f64, extract the upper 32-bit. Otherwise, bitcast it
1751 SDValue X = (TyX == MVT::f32) ?
1752 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(0)) :
1753 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
1755 SDValue Y = (TyY == MVT::f32) ?
1756 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(1)) :
1757 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(1),
1760 if (HasExtractInsert) {
1761 // ext E, Y, 31, 1 ; extract bit31 of Y
1762 // ins X, E, 31, 1 ; insert extracted bit at bit31 of X
1763 SDValue E = DAG.getNode(MipsISD::Ext, DL, MVT::i32, Y, Const31, Const1);
1764 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i32, E, Const31, Const1, X);
1767 // srl SrlX, SllX, 1
1769 // sll SllY, SrlX, 31
1770 // or Or, SrlX, SllY
1771 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i32, X, Const1);
1772 SDValue SrlX = DAG.getNode(ISD::SRL, DL, MVT::i32, SllX, Const1);
1773 SDValue SrlY = DAG.getNode(ISD::SRL, DL, MVT::i32, Y, Const31);
1774 SDValue SllY = DAG.getNode(ISD::SHL, DL, MVT::i32, SrlY, Const31);
1775 Res = DAG.getNode(ISD::OR, DL, MVT::i32, SrlX, SllY);
1778 if (TyX == MVT::f32)
1779 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Res);
1781 SDValue LowX = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
1782 Op.getOperand(0), DAG.getConstant(0, MVT::i32));
1783 return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, LowX, Res);
1786 static SDValue lowerFCOPYSIGN64(SDValue Op, SelectionDAG &DAG,
1787 bool HasExtractInsert) {
1788 unsigned WidthX = Op.getOperand(0).getValueSizeInBits();
1789 unsigned WidthY = Op.getOperand(1).getValueSizeInBits();
1790 EVT TyX = MVT::getIntegerVT(WidthX), TyY = MVT::getIntegerVT(WidthY);
1791 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1794 // Bitcast to integer nodes.
1795 SDValue X = DAG.getNode(ISD::BITCAST, DL, TyX, Op.getOperand(0));
1796 SDValue Y = DAG.getNode(ISD::BITCAST, DL, TyY, Op.getOperand(1));
1798 if (HasExtractInsert) {
1799 // ext E, Y, width(Y) - 1, 1 ; extract bit width(Y)-1 of Y
1800 // ins X, E, width(X) - 1, 1 ; insert extracted bit at bit width(X)-1 of X
1801 SDValue E = DAG.getNode(MipsISD::Ext, DL, TyY, Y,
1802 DAG.getConstant(WidthY - 1, MVT::i32), Const1);
1804 if (WidthX > WidthY)
1805 E = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, E);
1806 else if (WidthY > WidthX)
1807 E = DAG.getNode(ISD::TRUNCATE, DL, TyX, E);
1809 SDValue I = DAG.getNode(MipsISD::Ins, DL, TyX, E,
1810 DAG.getConstant(WidthX - 1, MVT::i32), Const1, X);
1811 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), I);
1814 // (d)sll SllX, X, 1
1815 // (d)srl SrlX, SllX, 1
1816 // (d)srl SrlY, Y, width(Y)-1
1817 // (d)sll SllY, SrlX, width(Y)-1
1818 // or Or, SrlX, SllY
1819 SDValue SllX = DAG.getNode(ISD::SHL, DL, TyX, X, Const1);
1820 SDValue SrlX = DAG.getNode(ISD::SRL, DL, TyX, SllX, Const1);
1821 SDValue SrlY = DAG.getNode(ISD::SRL, DL, TyY, Y,
1822 DAG.getConstant(WidthY - 1, MVT::i32));
1824 if (WidthX > WidthY)
1825 SrlY = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, SrlY);
1826 else if (WidthY > WidthX)
1827 SrlY = DAG.getNode(ISD::TRUNCATE, DL, TyX, SrlY);
1829 SDValue SllY = DAG.getNode(ISD::SHL, DL, TyX, SrlY,
1830 DAG.getConstant(WidthX - 1, MVT::i32));
1831 SDValue Or = DAG.getNode(ISD::OR, DL, TyX, SrlX, SllY);
1832 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Or);
1836 MipsTargetLowering::lowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
1837 if (Subtarget->isGP64bit())
1838 return lowerFCOPYSIGN64(Op, DAG, Subtarget->hasExtractInsert());
1840 return lowerFCOPYSIGN32(Op, DAG, Subtarget->hasExtractInsert());
1843 SDValue MipsTargetLowering::
1844 lowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
1846 assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
1847 "Frame address can only be determined for current frame.");
1849 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
1850 MFI->setFrameAddressIsTaken(true);
1851 EVT VT = Op.getValueType();
1853 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), DL,
1854 isN64() ? Mips::FP_64 : Mips::FP, VT);
1858 SDValue MipsTargetLowering::lowerRETURNADDR(SDValue Op,
1859 SelectionDAG &DAG) const {
1860 if (verifyReturnAddressArgumentIsConstant(Op, DAG))
1864 assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
1865 "Return address can be determined only for current frame.");
1867 MachineFunction &MF = DAG.getMachineFunction();
1868 MachineFrameInfo *MFI = MF.getFrameInfo();
1869 MVT VT = Op.getSimpleValueType();
1870 unsigned RA = isN64() ? Mips::RA_64 : Mips::RA;
1871 MFI->setReturnAddressIsTaken(true);
1873 // Return RA, which contains the return address. Mark it an implicit live-in.
1874 unsigned Reg = MF.addLiveIn(RA, getRegClassFor(VT));
1875 return DAG.getCopyFromReg(DAG.getEntryNode(), SDLoc(Op), Reg, VT);
1878 // An EH_RETURN is the result of lowering llvm.eh.return which in turn is
1879 // generated from __builtin_eh_return (offset, handler)
1880 // The effect of this is to adjust the stack pointer by "offset"
1881 // and then branch to "handler".
1882 SDValue MipsTargetLowering::lowerEH_RETURN(SDValue Op, SelectionDAG &DAG)
1884 MachineFunction &MF = DAG.getMachineFunction();
1885 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
1887 MipsFI->setCallsEhReturn();
1888 SDValue Chain = Op.getOperand(0);
1889 SDValue Offset = Op.getOperand(1);
1890 SDValue Handler = Op.getOperand(2);
1892 EVT Ty = isN64() ? MVT::i64 : MVT::i32;
1894 // Store stack offset in V1, store jump target in V0. Glue CopyToReg and
1895 // EH_RETURN nodes, so that instructions are emitted back-to-back.
1896 unsigned OffsetReg = isN64() ? Mips::V1_64 : Mips::V1;
1897 unsigned AddrReg = isN64() ? Mips::V0_64 : Mips::V0;
1898 Chain = DAG.getCopyToReg(Chain, DL, OffsetReg, Offset, SDValue());
1899 Chain = DAG.getCopyToReg(Chain, DL, AddrReg, Handler, Chain.getValue(1));
1900 return DAG.getNode(MipsISD::EH_RETURN, DL, MVT::Other, Chain,
1901 DAG.getRegister(OffsetReg, Ty),
1902 DAG.getRegister(AddrReg, getPointerTy()),
1906 SDValue MipsTargetLowering::lowerATOMIC_FENCE(SDValue Op,
1907 SelectionDAG &DAG) const {
1908 // FIXME: Need pseudo-fence for 'singlethread' fences
1909 // FIXME: Set SType for weaker fences where supported/appropriate.
1912 return DAG.getNode(MipsISD::Sync, DL, MVT::Other, Op.getOperand(0),
1913 DAG.getConstant(SType, MVT::i32));
1916 SDValue MipsTargetLowering::lowerShiftLeftParts(SDValue Op,
1917 SelectionDAG &DAG) const {
1919 SDValue Lo = Op.getOperand(0), Hi = Op.getOperand(1);
1920 SDValue Shamt = Op.getOperand(2);
1923 // lo = (shl lo, shamt)
1924 // hi = (or (shl hi, shamt) (srl (srl lo, 1), ~shamt))
1927 // hi = (shl lo, shamt[4:0])
1928 SDValue Not = DAG.getNode(ISD::XOR, DL, MVT::i32, Shamt,
1929 DAG.getConstant(-1, MVT::i32));
1930 SDValue ShiftRight1Lo = DAG.getNode(ISD::SRL, DL, MVT::i32, Lo,
1931 DAG.getConstant(1, MVT::i32));
1932 SDValue ShiftRightLo = DAG.getNode(ISD::SRL, DL, MVT::i32, ShiftRight1Lo,
1934 SDValue ShiftLeftHi = DAG.getNode(ISD::SHL, DL, MVT::i32, Hi, Shamt);
1935 SDValue Or = DAG.getNode(ISD::OR, DL, MVT::i32, ShiftLeftHi, ShiftRightLo);
1936 SDValue ShiftLeftLo = DAG.getNode(ISD::SHL, DL, MVT::i32, Lo, Shamt);
1937 SDValue Cond = DAG.getNode(ISD::AND, DL, MVT::i32, Shamt,
1938 DAG.getConstant(0x20, MVT::i32));
1939 Lo = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond,
1940 DAG.getConstant(0, MVT::i32), ShiftLeftLo);
1941 Hi = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond, ShiftLeftLo, Or);
1943 SDValue Ops[2] = {Lo, Hi};
1944 return DAG.getMergeValues(Ops, DL);
1947 SDValue MipsTargetLowering::lowerShiftRightParts(SDValue Op, SelectionDAG &DAG,
1950 SDValue Lo = Op.getOperand(0), Hi = Op.getOperand(1);
1951 SDValue Shamt = Op.getOperand(2);
1954 // lo = (or (shl (shl hi, 1), ~shamt) (srl lo, shamt))
1956 // hi = (sra hi, shamt)
1958 // hi = (srl hi, shamt)
1961 // lo = (sra hi, shamt[4:0])
1962 // hi = (sra hi, 31)
1964 // lo = (srl hi, shamt[4:0])
1966 SDValue Not = DAG.getNode(ISD::XOR, DL, MVT::i32, Shamt,
1967 DAG.getConstant(-1, MVT::i32));
1968 SDValue ShiftLeft1Hi = DAG.getNode(ISD::SHL, DL, MVT::i32, Hi,
1969 DAG.getConstant(1, MVT::i32));
1970 SDValue ShiftLeftHi = DAG.getNode(ISD::SHL, DL, MVT::i32, ShiftLeft1Hi, Not);
1971 SDValue ShiftRightLo = DAG.getNode(ISD::SRL, DL, MVT::i32, Lo, Shamt);
1972 SDValue Or = DAG.getNode(ISD::OR, DL, MVT::i32, ShiftLeftHi, ShiftRightLo);
1973 SDValue ShiftRightHi = DAG.getNode(IsSRA ? ISD::SRA : ISD::SRL, DL, MVT::i32,
1975 SDValue Cond = DAG.getNode(ISD::AND, DL, MVT::i32, Shamt,
1976 DAG.getConstant(0x20, MVT::i32));
1977 SDValue Shift31 = DAG.getNode(ISD::SRA, DL, MVT::i32, Hi,
1978 DAG.getConstant(31, MVT::i32));
1979 Lo = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond, ShiftRightHi, Or);
1980 Hi = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond,
1981 IsSRA ? Shift31 : DAG.getConstant(0, MVT::i32),
1984 SDValue Ops[2] = {Lo, Hi};
1985 return DAG.getMergeValues(Ops, DL);
1988 static SDValue createLoadLR(unsigned Opc, SelectionDAG &DAG, LoadSDNode *LD,
1989 SDValue Chain, SDValue Src, unsigned Offset) {
1990 SDValue Ptr = LD->getBasePtr();
1991 EVT VT = LD->getValueType(0), MemVT = LD->getMemoryVT();
1992 EVT BasePtrVT = Ptr.getValueType();
1994 SDVTList VTList = DAG.getVTList(VT, MVT::Other);
1997 Ptr = DAG.getNode(ISD::ADD, DL, BasePtrVT, Ptr,
1998 DAG.getConstant(Offset, BasePtrVT));
2000 SDValue Ops[] = { Chain, Ptr, Src };
2001 return DAG.getMemIntrinsicNode(Opc, DL, VTList, Ops, MemVT,
2002 LD->getMemOperand());
2005 // Expand an unaligned 32 or 64-bit integer load node.
2006 SDValue MipsTargetLowering::lowerLOAD(SDValue Op, SelectionDAG &DAG) const {
2007 LoadSDNode *LD = cast<LoadSDNode>(Op);
2008 EVT MemVT = LD->getMemoryVT();
2010 if (Subtarget->systemSupportsUnalignedAccess())
2013 // Return if load is aligned or if MemVT is neither i32 nor i64.
2014 if ((LD->getAlignment() >= MemVT.getSizeInBits() / 8) ||
2015 ((MemVT != MVT::i32) && (MemVT != MVT::i64)))
2018 bool IsLittle = Subtarget->isLittle();
2019 EVT VT = Op.getValueType();
2020 ISD::LoadExtType ExtType = LD->getExtensionType();
2021 SDValue Chain = LD->getChain(), Undef = DAG.getUNDEF(VT);
2023 assert((VT == MVT::i32) || (VT == MVT::i64));
2026 // (set dst, (i64 (load baseptr)))
2028 // (set tmp, (ldl (add baseptr, 7), undef))
2029 // (set dst, (ldr baseptr, tmp))
2030 if ((VT == MVT::i64) && (ExtType == ISD::NON_EXTLOAD)) {
2031 SDValue LDL = createLoadLR(MipsISD::LDL, DAG, LD, Chain, Undef,
2033 return createLoadLR(MipsISD::LDR, DAG, LD, LDL.getValue(1), LDL,
2037 SDValue LWL = createLoadLR(MipsISD::LWL, DAG, LD, Chain, Undef,
2039 SDValue LWR = createLoadLR(MipsISD::LWR, DAG, LD, LWL.getValue(1), LWL,
2043 // (set dst, (i32 (load baseptr))) or
2044 // (set dst, (i64 (sextload baseptr))) or
2045 // (set dst, (i64 (extload baseptr)))
2047 // (set tmp, (lwl (add baseptr, 3), undef))
2048 // (set dst, (lwr baseptr, tmp))
2049 if ((VT == MVT::i32) || (ExtType == ISD::SEXTLOAD) ||
2050 (ExtType == ISD::EXTLOAD))
2053 assert((VT == MVT::i64) && (ExtType == ISD::ZEXTLOAD));
2056 // (set dst, (i64 (zextload baseptr)))
2058 // (set tmp0, (lwl (add baseptr, 3), undef))
2059 // (set tmp1, (lwr baseptr, tmp0))
2060 // (set tmp2, (shl tmp1, 32))
2061 // (set dst, (srl tmp2, 32))
2063 SDValue Const32 = DAG.getConstant(32, MVT::i32);
2064 SDValue SLL = DAG.getNode(ISD::SHL, DL, MVT::i64, LWR, Const32);
2065 SDValue SRL = DAG.getNode(ISD::SRL, DL, MVT::i64, SLL, Const32);
2066 SDValue Ops[] = { SRL, LWR.getValue(1) };
2067 return DAG.getMergeValues(Ops, DL);
2070 static SDValue createStoreLR(unsigned Opc, SelectionDAG &DAG, StoreSDNode *SD,
2071 SDValue Chain, unsigned Offset) {
2072 SDValue Ptr = SD->getBasePtr(), Value = SD->getValue();
2073 EVT MemVT = SD->getMemoryVT(), BasePtrVT = Ptr.getValueType();
2075 SDVTList VTList = DAG.getVTList(MVT::Other);
2078 Ptr = DAG.getNode(ISD::ADD, DL, BasePtrVT, Ptr,
2079 DAG.getConstant(Offset, BasePtrVT));
2081 SDValue Ops[] = { Chain, Value, Ptr };
2082 return DAG.getMemIntrinsicNode(Opc, DL, VTList, Ops, MemVT,
2083 SD->getMemOperand());
2086 // Expand an unaligned 32 or 64-bit integer store node.
2087 static SDValue lowerUnalignedIntStore(StoreSDNode *SD, SelectionDAG &DAG,
2089 SDValue Value = SD->getValue(), Chain = SD->getChain();
2090 EVT VT = Value.getValueType();
2093 // (store val, baseptr) or
2094 // (truncstore val, baseptr)
2096 // (swl val, (add baseptr, 3))
2097 // (swr val, baseptr)
2098 if ((VT == MVT::i32) || SD->isTruncatingStore()) {
2099 SDValue SWL = createStoreLR(MipsISD::SWL, DAG, SD, Chain,
2101 return createStoreLR(MipsISD::SWR, DAG, SD, SWL, IsLittle ? 0 : 3);
2104 assert(VT == MVT::i64);
2107 // (store val, baseptr)
2109 // (sdl val, (add baseptr, 7))
2110 // (sdr val, baseptr)
2111 SDValue SDL = createStoreLR(MipsISD::SDL, DAG, SD, Chain, IsLittle ? 7 : 0);
2112 return createStoreLR(MipsISD::SDR, DAG, SD, SDL, IsLittle ? 0 : 7);
2115 // Lower (store (fp_to_sint $fp) $ptr) to (store (TruncIntFP $fp), $ptr).
2116 static SDValue lowerFP_TO_SINT_STORE(StoreSDNode *SD, SelectionDAG &DAG) {
2117 SDValue Val = SD->getValue();
2119 if (Val.getOpcode() != ISD::FP_TO_SINT)
2122 EVT FPTy = EVT::getFloatingPointVT(Val.getValueSizeInBits());
2123 SDValue Tr = DAG.getNode(MipsISD::TruncIntFP, SDLoc(Val), FPTy,
2126 return DAG.getStore(SD->getChain(), SDLoc(SD), Tr, SD->getBasePtr(),
2127 SD->getPointerInfo(), SD->isVolatile(),
2128 SD->isNonTemporal(), SD->getAlignment());
2131 SDValue MipsTargetLowering::lowerSTORE(SDValue Op, SelectionDAG &DAG) const {
2132 StoreSDNode *SD = cast<StoreSDNode>(Op);
2133 EVT MemVT = SD->getMemoryVT();
2135 // Lower unaligned integer stores.
2136 if (!Subtarget->systemSupportsUnalignedAccess() &&
2137 (SD->getAlignment() < MemVT.getSizeInBits() / 8) &&
2138 ((MemVT == MVT::i32) || (MemVT == MVT::i64)))
2139 return lowerUnalignedIntStore(SD, DAG, Subtarget->isLittle());
2141 return lowerFP_TO_SINT_STORE(SD, DAG);
2144 SDValue MipsTargetLowering::lowerADD(SDValue Op, SelectionDAG &DAG) const {
2145 if (Op->getOperand(0).getOpcode() != ISD::FRAMEADDR
2146 || cast<ConstantSDNode>
2147 (Op->getOperand(0).getOperand(0))->getZExtValue() != 0
2148 || Op->getOperand(1).getOpcode() != ISD::FRAME_TO_ARGS_OFFSET)
2152 // (add (frameaddr 0), (frame_to_args_offset))
2153 // results from lowering llvm.eh.dwarf.cfa intrinsic. Transform it to
2154 // (add FrameObject, 0)
2155 // where FrameObject is a fixed StackObject with offset 0 which points to
2156 // the old stack pointer.
2157 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
2158 EVT ValTy = Op->getValueType(0);
2159 int FI = MFI->CreateFixedObject(Op.getValueSizeInBits() / 8, 0, false);
2160 SDValue InArgsAddr = DAG.getFrameIndex(FI, ValTy);
2161 return DAG.getNode(ISD::ADD, SDLoc(Op), ValTy, InArgsAddr,
2162 DAG.getConstant(0, ValTy));
2165 SDValue MipsTargetLowering::lowerFP_TO_SINT(SDValue Op,
2166 SelectionDAG &DAG) const {
2167 EVT FPTy = EVT::getFloatingPointVT(Op.getValueSizeInBits());
2168 SDValue Trunc = DAG.getNode(MipsISD::TruncIntFP, SDLoc(Op), FPTy,
2170 return DAG.getNode(ISD::BITCAST, SDLoc(Op), Op.getValueType(), Trunc);
2173 //===----------------------------------------------------------------------===//
2174 // Calling Convention Implementation
2175 //===----------------------------------------------------------------------===//
2177 //===----------------------------------------------------------------------===//
2178 // TODO: Implement a generic logic using tblgen that can support this.
2179 // Mips O32 ABI rules:
2181 // i32 - Passed in A0, A1, A2, A3 and stack
2182 // f32 - Only passed in f32 registers if no int reg has been used yet to hold
2183 // an argument. Otherwise, passed in A1, A2, A3 and stack.
2184 // f64 - Only passed in two aliased f32 registers if no int reg has been used
2185 // yet to hold an argument. Otherwise, use A2, A3 and stack. If A1 is
2186 // not used, it must be shadowed. If only A3 is avaiable, shadow it and
2189 // For vararg functions, all arguments are passed in A0, A1, A2, A3 and stack.
2190 //===----------------------------------------------------------------------===//
2192 static bool CC_MipsO32(unsigned ValNo, MVT ValVT, MVT LocVT,
2193 CCValAssign::LocInfo LocInfo, ISD::ArgFlagsTy ArgFlags,
2194 CCState &State, const MCPhysReg *F64Regs) {
2196 static const unsigned IntRegsSize = 4, FloatRegsSize = 2;
2198 static const MCPhysReg IntRegs[] = { Mips::A0, Mips::A1, Mips::A2, Mips::A3 };
2199 static const MCPhysReg F32Regs[] = { Mips::F12, Mips::F14 };
2201 // Do not process byval args here.
2202 if (ArgFlags.isByVal())
2205 // Promote i8 and i16
2206 if (LocVT == MVT::i8 || LocVT == MVT::i16) {
2208 if (ArgFlags.isSExt())
2209 LocInfo = CCValAssign::SExt;
2210 else if (ArgFlags.isZExt())
2211 LocInfo = CCValAssign::ZExt;
2213 LocInfo = CCValAssign::AExt;
2218 // f32 and f64 are allocated in A0, A1, A2, A3 when either of the following
2219 // is true: function is vararg, argument is 3rd or higher, there is previous
2220 // argument which is not f32 or f64.
2221 bool AllocateFloatsInIntReg = State.isVarArg() || ValNo > 1
2222 || State.getFirstUnallocated(F32Regs, FloatRegsSize) != ValNo;
2223 unsigned OrigAlign = ArgFlags.getOrigAlign();
2224 bool isI64 = (ValVT == MVT::i32 && OrigAlign == 8);
2226 if (ValVT == MVT::i32 || (ValVT == MVT::f32 && AllocateFloatsInIntReg)) {
2227 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2228 // If this is the first part of an i64 arg,
2229 // the allocated register must be either A0 or A2.
2230 if (isI64 && (Reg == Mips::A1 || Reg == Mips::A3))
2231 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2233 } else if (ValVT == MVT::f64 && AllocateFloatsInIntReg) {
2234 // Allocate int register and shadow next int register. If first
2235 // available register is Mips::A1 or Mips::A3, shadow it too.
2236 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2237 if (Reg == Mips::A1 || Reg == Mips::A3)
2238 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2239 State.AllocateReg(IntRegs, IntRegsSize);
2241 } else if (ValVT.isFloatingPoint() && !AllocateFloatsInIntReg) {
2242 // we are guaranteed to find an available float register
2243 if (ValVT == MVT::f32) {
2244 Reg = State.AllocateReg(F32Regs, FloatRegsSize);
2245 // Shadow int register
2246 State.AllocateReg(IntRegs, IntRegsSize);
2248 Reg = State.AllocateReg(F64Regs, FloatRegsSize);
2249 // Shadow int registers
2250 unsigned Reg2 = State.AllocateReg(IntRegs, IntRegsSize);
2251 if (Reg2 == Mips::A1 || Reg2 == Mips::A3)
2252 State.AllocateReg(IntRegs, IntRegsSize);
2253 State.AllocateReg(IntRegs, IntRegsSize);
2256 llvm_unreachable("Cannot handle this ValVT.");
2259 unsigned Offset = State.AllocateStack(ValVT.getSizeInBits() >> 3,
2261 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
2263 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
2268 static bool CC_MipsO32_FP32(unsigned ValNo, MVT ValVT,
2269 MVT LocVT, CCValAssign::LocInfo LocInfo,
2270 ISD::ArgFlagsTy ArgFlags, CCState &State) {
2271 static const MCPhysReg F64Regs[] = { Mips::D6, Mips::D7 };
2273 return CC_MipsO32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State, F64Regs);
2276 static bool CC_MipsO32_FP64(unsigned ValNo, MVT ValVT,
2277 MVT LocVT, CCValAssign::LocInfo LocInfo,
2278 ISD::ArgFlagsTy ArgFlags, CCState &State) {
2279 static const MCPhysReg F64Regs[] = { Mips::D12_64, Mips::D14_64 };
2281 return CC_MipsO32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State, F64Regs);
2284 #include "MipsGenCallingConv.inc"
2286 //===----------------------------------------------------------------------===//
2287 // Call Calling Convention Implementation
2288 //===----------------------------------------------------------------------===//
2290 // Return next O32 integer argument register.
2291 static unsigned getNextIntArgReg(unsigned Reg) {
2292 assert((Reg == Mips::A0) || (Reg == Mips::A2));
2293 return (Reg == Mips::A0) ? Mips::A1 : Mips::A3;
2297 MipsTargetLowering::passArgOnStack(SDValue StackPtr, unsigned Offset,
2298 SDValue Chain, SDValue Arg, SDLoc DL,
2299 bool IsTailCall, SelectionDAG &DAG) const {
2301 SDValue PtrOff = DAG.getNode(ISD::ADD, DL, getPointerTy(), StackPtr,
2302 DAG.getIntPtrConstant(Offset));
2303 return DAG.getStore(Chain, DL, Arg, PtrOff, MachinePointerInfo(), false,
2307 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
2308 int FI = MFI->CreateFixedObject(Arg.getValueSizeInBits() / 8, Offset, false);
2309 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2310 return DAG.getStore(Chain, DL, Arg, FIN, MachinePointerInfo(),
2311 /*isVolatile=*/ true, false, 0);
2314 void MipsTargetLowering::
2315 getOpndList(SmallVectorImpl<SDValue> &Ops,
2316 std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
2317 bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
2318 CallLoweringInfo &CLI, SDValue Callee, SDValue Chain) const {
2319 // Insert node "GP copy globalreg" before call to function.
2321 // R_MIPS_CALL* operators (emitted when non-internal functions are called
2322 // in PIC mode) allow symbols to be resolved via lazy binding.
2323 // The lazy binding stub requires GP to point to the GOT.
2324 if (IsPICCall && !InternalLinkage) {
2325 unsigned GPReg = isN64() ? Mips::GP_64 : Mips::GP;
2326 EVT Ty = isN64() ? MVT::i64 : MVT::i32;
2327 RegsToPass.push_back(std::make_pair(GPReg, getGlobalReg(CLI.DAG, Ty)));
2330 // Build a sequence of copy-to-reg nodes chained together with token
2331 // chain and flag operands which copy the outgoing args into registers.
2332 // The InFlag in necessary since all emitted instructions must be
2336 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2337 Chain = CLI.DAG.getCopyToReg(Chain, CLI.DL, RegsToPass[i].first,
2338 RegsToPass[i].second, InFlag);
2339 InFlag = Chain.getValue(1);
2342 // Add argument registers to the end of the list so that they are
2343 // known live into the call.
2344 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2345 Ops.push_back(CLI.DAG.getRegister(RegsToPass[i].first,
2346 RegsToPass[i].second.getValueType()));
2348 // Add a register mask operand representing the call-preserved registers.
2349 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2350 const uint32_t *Mask = TRI->getCallPreservedMask(CLI.CallConv);
2351 assert(Mask && "Missing call preserved mask for calling convention");
2352 if (Subtarget->inMips16HardFloat()) {
2353 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(CLI.Callee)) {
2354 llvm::StringRef Sym = G->getGlobal()->getName();
2355 Function *F = G->getGlobal()->getParent()->getFunction(Sym);
2356 if (F && F->hasFnAttribute("__Mips16RetHelper")) {
2357 Mask = MipsRegisterInfo::getMips16RetHelperMask();
2361 Ops.push_back(CLI.DAG.getRegisterMask(Mask));
2363 if (InFlag.getNode())
2364 Ops.push_back(InFlag);
2367 /// LowerCall - functions arguments are copied from virtual regs to
2368 /// (physical regs)/(stack frame), CALLSEQ_START and CALLSEQ_END are emitted.
2370 MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
2371 SmallVectorImpl<SDValue> &InVals) const {
2372 SelectionDAG &DAG = CLI.DAG;
2374 SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
2375 SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
2376 SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
2377 SDValue Chain = CLI.Chain;
2378 SDValue Callee = CLI.Callee;
2379 bool &IsTailCall = CLI.IsTailCall;
2380 CallingConv::ID CallConv = CLI.CallConv;
2381 bool IsVarArg = CLI.IsVarArg;
2383 MachineFunction &MF = DAG.getMachineFunction();
2384 MachineFrameInfo *MFI = MF.getFrameInfo();
2385 const TargetFrameLowering *TFL = MF.getTarget().getFrameLowering();
2386 MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
2387 bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
2389 // Analyze operands of the call, assigning locations to each operand.
2390 SmallVector<CCValAssign, 16> ArgLocs;
2391 CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
2392 getTargetMachine(), ArgLocs, *DAG.getContext());
2393 MipsCC::SpecialCallingConvType SpecialCallingConv =
2394 getSpecialCallingConv(Callee);
2395 MipsCC MipsCCInfo(CallConv, isO32(), Subtarget->isFP64bit(), CCInfo,
2396 SpecialCallingConv);
2398 MipsCCInfo.analyzeCallOperands(Outs, IsVarArg,
2399 Subtarget->mipsSEUsesSoftFloat(),
2400 Callee.getNode(), CLI.getArgs());
2402 // Get a count of how many bytes are to be pushed on the stack.
2403 unsigned NextStackOffset = CCInfo.getNextStackOffset();
2405 // Check if it's really possible to do a tail call.
2408 isEligibleForTailCallOptimization(MipsCCInfo, NextStackOffset,
2409 *MF.getInfo<MipsFunctionInfo>());
2411 if (!IsTailCall && CLI.CS && CLI.CS->isMustTailCall())
2412 report_fatal_error("failed to perform tail call elimination on a call "
2413 "site marked musttail");
2418 // Chain is the output chain of the last Load/Store or CopyToReg node.
2419 // ByValChain is the output chain of the last Memcpy node created for copying
2420 // byval arguments to the stack.
2421 unsigned StackAlignment = TFL->getStackAlignment();
2422 NextStackOffset = RoundUpToAlignment(NextStackOffset, StackAlignment);
2423 SDValue NextStackOffsetVal = DAG.getIntPtrConstant(NextStackOffset, true);
2426 Chain = DAG.getCALLSEQ_START(Chain, NextStackOffsetVal, DL);
2428 SDValue StackPtr = DAG.getCopyFromReg(
2429 Chain, DL, isN64() ? Mips::SP_64 : Mips::SP, getPointerTy());
2431 // With EABI is it possible to have 16 args on registers.
2432 std::deque< std::pair<unsigned, SDValue> > RegsToPass;
2433 SmallVector<SDValue, 8> MemOpChains;
2434 MipsCC::byval_iterator ByValArg = MipsCCInfo.byval_begin();
2436 // Walk the register/memloc assignments, inserting copies/loads.
2437 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2438 SDValue Arg = OutVals[i];
2439 CCValAssign &VA = ArgLocs[i];
2440 MVT ValVT = VA.getValVT(), LocVT = VA.getLocVT();
2441 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2444 if (Flags.isByVal()) {
2445 assert(Flags.getByValSize() &&
2446 "ByVal args of size 0 should have been ignored by front-end.");
2447 assert(ByValArg != MipsCCInfo.byval_end());
2448 assert(!IsTailCall &&
2449 "Do not tail-call optimize if there is a byval argument.");
2450 passByValArg(Chain, DL, RegsToPass, MemOpChains, StackPtr, MFI, DAG, Arg,
2451 MipsCCInfo, *ByValArg, Flags, Subtarget->isLittle());
2456 // Promote the value if needed.
2457 switch (VA.getLocInfo()) {
2458 default: llvm_unreachable("Unknown loc info!");
2459 case CCValAssign::Full:
2460 if (VA.isRegLoc()) {
2461 if ((ValVT == MVT::f32 && LocVT == MVT::i32) ||
2462 (ValVT == MVT::f64 && LocVT == MVT::i64) ||
2463 (ValVT == MVT::i64 && LocVT == MVT::f64))
2464 Arg = DAG.getNode(ISD::BITCAST, DL, LocVT, Arg);
2465 else if (ValVT == MVT::f64 && LocVT == MVT::i32) {
2466 SDValue Lo = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
2467 Arg, DAG.getConstant(0, MVT::i32));
2468 SDValue Hi = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
2469 Arg, DAG.getConstant(1, MVT::i32));
2470 if (!Subtarget->isLittle())
2472 unsigned LocRegLo = VA.getLocReg();
2473 unsigned LocRegHigh = getNextIntArgReg(LocRegLo);
2474 RegsToPass.push_back(std::make_pair(LocRegLo, Lo));
2475 RegsToPass.push_back(std::make_pair(LocRegHigh, Hi));
2480 case CCValAssign::SExt:
2481 Arg = DAG.getNode(ISD::SIGN_EXTEND, DL, LocVT, Arg);
2483 case CCValAssign::ZExt:
2484 Arg = DAG.getNode(ISD::ZERO_EXTEND, DL, LocVT, Arg);
2486 case CCValAssign::AExt:
2487 Arg = DAG.getNode(ISD::ANY_EXTEND, DL, LocVT, Arg);
2491 // Arguments that can be passed on register must be kept at
2492 // RegsToPass vector
2493 if (VA.isRegLoc()) {
2494 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2498 // Register can't get to this point...
2499 assert(VA.isMemLoc());
2501 // emit ISD::STORE whichs stores the
2502 // parameter value to a stack Location
2503 MemOpChains.push_back(passArgOnStack(StackPtr, VA.getLocMemOffset(),
2504 Chain, Arg, DL, IsTailCall, DAG));
2507 // Transform all store nodes into one single node because all store
2508 // nodes are independent of each other.
2509 if (!MemOpChains.empty())
2510 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOpChains);
2512 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
2513 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
2514 // node so that legalize doesn't hack it.
2515 bool IsPICCall = (isN64() || IsPIC); // true if calls are translated to
2517 bool GlobalOrExternal = false, InternalLinkage = false;
2519 EVT Ty = Callee.getValueType();
2521 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2523 const GlobalValue *Val = G->getGlobal();
2524 InternalLinkage = Val->hasInternalLinkage();
2526 if (InternalLinkage)
2527 Callee = getAddrLocal(G, Ty, DAG, isN32() || isN64());
2529 Callee = getAddrGlobalLargeGOT(G, Ty, DAG, MipsII::MO_CALL_HI16,
2530 MipsII::MO_CALL_LO16, Chain,
2531 FuncInfo->callPtrInfo(Val));
2533 Callee = getAddrGlobal(G, Ty, DAG, MipsII::MO_GOT_CALL, Chain,
2534 FuncInfo->callPtrInfo(Val));
2536 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), DL, getPointerTy(), 0,
2537 MipsII::MO_NO_FLAG);
2538 GlobalOrExternal = true;
2540 else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2541 const char *Sym = S->getSymbol();
2543 if (!isN64() && !IsPIC) // !N64 && static
2544 Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy(),
2545 MipsII::MO_NO_FLAG);
2547 Callee = getAddrGlobalLargeGOT(S, Ty, DAG, MipsII::MO_CALL_HI16,
2548 MipsII::MO_CALL_LO16, Chain,
2549 FuncInfo->callPtrInfo(Sym));
2551 Callee = getAddrGlobal(S, Ty, DAG, MipsII::MO_GOT_CALL, Chain,
2552 FuncInfo->callPtrInfo(Sym));
2554 GlobalOrExternal = true;
2557 SmallVector<SDValue, 8> Ops(1, Chain);
2558 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2560 getOpndList(Ops, RegsToPass, IsPICCall, GlobalOrExternal, InternalLinkage,
2561 CLI, Callee, Chain);
2564 return DAG.getNode(MipsISD::TailCall, DL, MVT::Other, Ops);
2566 Chain = DAG.getNode(MipsISD::JmpLink, DL, NodeTys, Ops);
2567 SDValue InFlag = Chain.getValue(1);
2569 // Create the CALLSEQ_END node.
2570 Chain = DAG.getCALLSEQ_END(Chain, NextStackOffsetVal,
2571 DAG.getIntPtrConstant(0, true), InFlag, DL);
2572 InFlag = Chain.getValue(1);
2574 // Handle result values, copying them out of physregs into vregs that we
2576 return LowerCallResult(Chain, InFlag, CallConv, IsVarArg,
2577 Ins, DL, DAG, InVals, CLI.Callee.getNode(), CLI.RetTy);
2580 /// LowerCallResult - Lower the result values of a call into the
2581 /// appropriate copies out of appropriate physical registers.
2583 MipsTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
2584 CallingConv::ID CallConv, bool IsVarArg,
2585 const SmallVectorImpl<ISD::InputArg> &Ins,
2586 SDLoc DL, SelectionDAG &DAG,
2587 SmallVectorImpl<SDValue> &InVals,
2588 const SDNode *CallNode,
2589 const Type *RetTy) const {
2590 // Assign locations to each value returned by this call.
2591 SmallVector<CCValAssign, 16> RVLocs;
2592 CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
2593 getTargetMachine(), RVLocs, *DAG.getContext());
2594 MipsCC MipsCCInfo(CallConv, isO32(), Subtarget->isFP64bit(), CCInfo);
2596 MipsCCInfo.analyzeCallResult(Ins, Subtarget->mipsSEUsesSoftFloat(),
2599 // Copy all of the result registers out of their specified physreg.
2600 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2601 SDValue Val = DAG.getCopyFromReg(Chain, DL, RVLocs[i].getLocReg(),
2602 RVLocs[i].getLocVT(), InFlag);
2603 Chain = Val.getValue(1);
2604 InFlag = Val.getValue(2);
2606 if (RVLocs[i].getValVT() != RVLocs[i].getLocVT())
2607 Val = DAG.getNode(ISD::BITCAST, DL, RVLocs[i].getValVT(), Val);
2609 InVals.push_back(Val);
2615 //===----------------------------------------------------------------------===//
2616 // Formal Arguments Calling Convention Implementation
2617 //===----------------------------------------------------------------------===//
2618 /// LowerFormalArguments - transform physical registers into virtual registers
2619 /// and generate load operations for arguments places on the stack.
2621 MipsTargetLowering::LowerFormalArguments(SDValue Chain,
2622 CallingConv::ID CallConv,
2624 const SmallVectorImpl<ISD::InputArg> &Ins,
2625 SDLoc DL, SelectionDAG &DAG,
2626 SmallVectorImpl<SDValue> &InVals)
2628 MachineFunction &MF = DAG.getMachineFunction();
2629 MachineFrameInfo *MFI = MF.getFrameInfo();
2630 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2632 MipsFI->setVarArgsFrameIndex(0);
2634 // Used with vargs to acumulate store chains.
2635 std::vector<SDValue> OutChains;
2637 // Assign locations to all of the incoming arguments.
2638 SmallVector<CCValAssign, 16> ArgLocs;
2639 CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
2640 getTargetMachine(), ArgLocs, *DAG.getContext());
2641 MipsCC MipsCCInfo(CallConv, isO32(), Subtarget->isFP64bit(), CCInfo);
2642 Function::const_arg_iterator FuncArg =
2643 DAG.getMachineFunction().getFunction()->arg_begin();
2644 bool UseSoftFloat = Subtarget->mipsSEUsesSoftFloat();
2646 MipsCCInfo.analyzeFormalArguments(Ins, UseSoftFloat, FuncArg);
2647 MipsFI->setFormalArgInfo(CCInfo.getNextStackOffset(),
2648 MipsCCInfo.hasByValArg());
2650 unsigned CurArgIdx = 0;
2651 MipsCC::byval_iterator ByValArg = MipsCCInfo.byval_begin();
2653 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2654 CCValAssign &VA = ArgLocs[i];
2655 std::advance(FuncArg, Ins[i].OrigArgIndex - CurArgIdx);
2656 CurArgIdx = Ins[i].OrigArgIndex;
2657 EVT ValVT = VA.getValVT();
2658 ISD::ArgFlagsTy Flags = Ins[i].Flags;
2659 bool IsRegLoc = VA.isRegLoc();
2661 if (Flags.isByVal()) {
2662 assert(Flags.getByValSize() &&
2663 "ByVal args of size 0 should have been ignored by front-end.");
2664 assert(ByValArg != MipsCCInfo.byval_end());
2665 copyByValRegs(Chain, DL, OutChains, DAG, Flags, InVals, &*FuncArg,
2666 MipsCCInfo, *ByValArg);
2671 // Arguments stored on registers
2673 MVT RegVT = VA.getLocVT();
2674 unsigned ArgReg = VA.getLocReg();
2675 const TargetRegisterClass *RC = getRegClassFor(RegVT);
2677 // Transform the arguments stored on
2678 // physical registers into virtual ones
2679 unsigned Reg = addLiveIn(DAG.getMachineFunction(), ArgReg, RC);
2680 SDValue ArgValue = DAG.getCopyFromReg(Chain, DL, Reg, RegVT);
2682 // If this is an 8 or 16-bit value, it has been passed promoted
2683 // to 32 bits. Insert an assert[sz]ext to capture this, then
2684 // truncate to the right size.
2685 if (VA.getLocInfo() != CCValAssign::Full) {
2686 unsigned Opcode = 0;
2687 if (VA.getLocInfo() == CCValAssign::SExt)
2688 Opcode = ISD::AssertSext;
2689 else if (VA.getLocInfo() == CCValAssign::ZExt)
2690 Opcode = ISD::AssertZext;
2692 ArgValue = DAG.getNode(Opcode, DL, RegVT, ArgValue,
2693 DAG.getValueType(ValVT));
2694 ArgValue = DAG.getNode(ISD::TRUNCATE, DL, ValVT, ArgValue);
2697 // Handle floating point arguments passed in integer registers and
2698 // long double arguments passed in floating point registers.
2699 if ((RegVT == MVT::i32 && ValVT == MVT::f32) ||
2700 (RegVT == MVT::i64 && ValVT == MVT::f64) ||
2701 (RegVT == MVT::f64 && ValVT == MVT::i64))
2702 ArgValue = DAG.getNode(ISD::BITCAST, DL, ValVT, ArgValue);
2703 else if (isO32() && RegVT == MVT::i32 && ValVT == MVT::f64) {
2704 unsigned Reg2 = addLiveIn(DAG.getMachineFunction(),
2705 getNextIntArgReg(ArgReg), RC);
2706 SDValue ArgValue2 = DAG.getCopyFromReg(Chain, DL, Reg2, RegVT);
2707 if (!Subtarget->isLittle())
2708 std::swap(ArgValue, ArgValue2);
2709 ArgValue = DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64,
2710 ArgValue, ArgValue2);
2713 InVals.push_back(ArgValue);
2714 } else { // VA.isRegLoc()
2717 assert(VA.isMemLoc());
2719 // The stack pointer offset is relative to the caller stack frame.
2720 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
2721 VA.getLocMemOffset(), true);
2723 // Create load nodes to retrieve arguments from the stack
2724 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2725 SDValue Load = DAG.getLoad(ValVT, DL, Chain, FIN,
2726 MachinePointerInfo::getFixedStack(FI),
2727 false, false, false, 0);
2728 InVals.push_back(Load);
2729 OutChains.push_back(Load.getValue(1));
2733 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2734 // The mips ABIs for returning structs by value requires that we copy
2735 // the sret argument into $v0 for the return. Save the argument into
2736 // a virtual register so that we can access it from the return points.
2737 if (Ins[i].Flags.isSRet()) {
2738 unsigned Reg = MipsFI->getSRetReturnReg();
2740 Reg = MF.getRegInfo().createVirtualRegister(
2741 getRegClassFor(isN64() ? MVT::i64 : MVT::i32));
2742 MipsFI->setSRetReturnReg(Reg);
2744 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), DL, Reg, InVals[i]);
2745 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Copy, Chain);
2751 writeVarArgRegs(OutChains, MipsCCInfo, Chain, DL, DAG);
2753 // All stores are grouped in one node to allow the matching between
2754 // the size of Ins and InVals. This only happens when on varg functions
2755 if (!OutChains.empty()) {
2756 OutChains.push_back(Chain);
2757 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, OutChains);
2763 //===----------------------------------------------------------------------===//
2764 // Return Value Calling Convention Implementation
2765 //===----------------------------------------------------------------------===//
2768 MipsTargetLowering::CanLowerReturn(CallingConv::ID CallConv,
2769 MachineFunction &MF, bool IsVarArg,
2770 const SmallVectorImpl<ISD::OutputArg> &Outs,
2771 LLVMContext &Context) const {
2772 SmallVector<CCValAssign, 16> RVLocs;
2773 CCState CCInfo(CallConv, IsVarArg, MF, getTargetMachine(),
2775 return CCInfo.CheckReturn(Outs, RetCC_Mips);
2779 MipsTargetLowering::LowerReturn(SDValue Chain,
2780 CallingConv::ID CallConv, bool IsVarArg,
2781 const SmallVectorImpl<ISD::OutputArg> &Outs,
2782 const SmallVectorImpl<SDValue> &OutVals,
2783 SDLoc DL, SelectionDAG &DAG) const {
2784 // CCValAssign - represent the assignment of
2785 // the return value to a location
2786 SmallVector<CCValAssign, 16> RVLocs;
2787 MachineFunction &MF = DAG.getMachineFunction();
2789 // CCState - Info about the registers and stack slot.
2790 CCState CCInfo(CallConv, IsVarArg, MF, getTargetMachine(), RVLocs,
2792 MipsCC MipsCCInfo(CallConv, isO32(), Subtarget->isFP64bit(), CCInfo);
2794 // Analyze return values.
2795 MipsCCInfo.analyzeReturn(Outs, Subtarget->mipsSEUsesSoftFloat(),
2796 MF.getFunction()->getReturnType());
2799 SmallVector<SDValue, 4> RetOps(1, Chain);
2801 // Copy the result values into the output registers.
2802 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2803 SDValue Val = OutVals[i];
2804 CCValAssign &VA = RVLocs[i];
2805 assert(VA.isRegLoc() && "Can only return in registers!");
2807 if (RVLocs[i].getValVT() != RVLocs[i].getLocVT())
2808 Val = DAG.getNode(ISD::BITCAST, DL, RVLocs[i].getLocVT(), Val);
2810 Chain = DAG.getCopyToReg(Chain, DL, VA.getLocReg(), Val, Flag);
2812 // Guarantee that all emitted copies are stuck together with flags.
2813 Flag = Chain.getValue(1);
2814 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2817 // The mips ABIs for returning structs by value requires that we copy
2818 // the sret argument into $v0 for the return. We saved the argument into
2819 // a virtual register in the entry block, so now we copy the value out
2821 if (MF.getFunction()->hasStructRetAttr()) {
2822 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2823 unsigned Reg = MipsFI->getSRetReturnReg();
2826 llvm_unreachable("sret virtual register not created in the entry block");
2827 SDValue Val = DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy());
2828 unsigned V0 = isN64() ? Mips::V0_64 : Mips::V0;
2830 Chain = DAG.getCopyToReg(Chain, DL, V0, Val, Flag);
2831 Flag = Chain.getValue(1);
2832 RetOps.push_back(DAG.getRegister(V0, getPointerTy()));
2835 RetOps[0] = Chain; // Update chain.
2837 // Add the flag if we have it.
2839 RetOps.push_back(Flag);
2841 // Return on Mips is always a "jr $ra"
2842 return DAG.getNode(MipsISD::Ret, DL, MVT::Other, RetOps);
2845 //===----------------------------------------------------------------------===//
2846 // Mips Inline Assembly Support
2847 //===----------------------------------------------------------------------===//
2849 /// getConstraintType - Given a constraint letter, return the type of
2850 /// constraint it is for this target.
2851 MipsTargetLowering::ConstraintType MipsTargetLowering::
2852 getConstraintType(const std::string &Constraint) const
2854 // Mips specific constraints
2855 // GCC config/mips/constraints.md
2857 // 'd' : An address register. Equivalent to r
2858 // unless generating MIPS16 code.
2859 // 'y' : Equivalent to r; retained for
2860 // backwards compatibility.
2861 // 'c' : A register suitable for use in an indirect
2862 // jump. This will always be $25 for -mabicalls.
2863 // 'l' : The lo register. 1 word storage.
2864 // 'x' : The hilo register pair. Double word storage.
2865 if (Constraint.size() == 1) {
2866 switch (Constraint[0]) {
2874 return C_RegisterClass;
2879 return TargetLowering::getConstraintType(Constraint);
2882 /// Examine constraint type and operand type and determine a weight value.
2883 /// This object must already have been set up with the operand type
2884 /// and the current alternative constraint selected.
2885 TargetLowering::ConstraintWeight
2886 MipsTargetLowering::getSingleConstraintMatchWeight(
2887 AsmOperandInfo &info, const char *constraint) const {
2888 ConstraintWeight weight = CW_Invalid;
2889 Value *CallOperandVal = info.CallOperandVal;
2890 // If we don't have a value, we can't do a match,
2891 // but allow it at the lowest weight.
2892 if (!CallOperandVal)
2894 Type *type = CallOperandVal->getType();
2895 // Look at the constraint type.
2896 switch (*constraint) {
2898 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
2902 if (type->isIntegerTy())
2903 weight = CW_Register;
2905 case 'f': // FPU or MSA register
2906 if (Subtarget->hasMSA() && type->isVectorTy() &&
2907 cast<VectorType>(type)->getBitWidth() == 128)
2908 weight = CW_Register;
2909 else if (type->isFloatTy())
2910 weight = CW_Register;
2912 case 'c': // $25 for indirect jumps
2913 case 'l': // lo register
2914 case 'x': // hilo register pair
2915 if (type->isIntegerTy())
2916 weight = CW_SpecificReg;
2918 case 'I': // signed 16 bit immediate
2919 case 'J': // integer zero
2920 case 'K': // unsigned 16 bit immediate
2921 case 'L': // signed 32 bit immediate where lower 16 bits are 0
2922 case 'N': // immediate in the range of -65535 to -1 (inclusive)
2923 case 'O': // signed 15 bit immediate (+- 16383)
2924 case 'P': // immediate in the range of 65535 to 1 (inclusive)
2925 if (isa<ConstantInt>(CallOperandVal))
2926 weight = CW_Constant;
2935 /// This is a helper function to parse a physical register string and split it
2936 /// into non-numeric and numeric parts (Prefix and Reg). The first boolean flag
2937 /// that is returned indicates whether parsing was successful. The second flag
2938 /// is true if the numeric part exists.
2939 static std::pair<bool, bool>
2940 parsePhysicalReg(const StringRef &C, std::string &Prefix,
2941 unsigned long long &Reg) {
2942 if (C.front() != '{' || C.back() != '}')
2943 return std::make_pair(false, false);
2945 // Search for the first numeric character.
2946 StringRef::const_iterator I, B = C.begin() + 1, E = C.end() - 1;
2947 I = std::find_if(B, E, std::ptr_fun(isdigit));
2949 Prefix.assign(B, I - B);
2951 // The second flag is set to false if no numeric characters were found.
2953 return std::make_pair(true, false);
2955 // Parse the numeric characters.
2956 return std::make_pair(!getAsUnsignedInteger(StringRef(I, E - I), 10, Reg),
2960 std::pair<unsigned, const TargetRegisterClass *> MipsTargetLowering::
2961 parseRegForInlineAsmConstraint(const StringRef &C, MVT VT) const {
2962 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2963 const TargetRegisterClass *RC;
2965 unsigned long long Reg;
2967 std::pair<bool, bool> R = parsePhysicalReg(C, Prefix, Reg);
2970 return std::make_pair(0U, nullptr);
2972 if ((Prefix == "hi" || Prefix == "lo")) { // Parse hi/lo.
2973 // No numeric characters follow "hi" or "lo".
2975 return std::make_pair(0U, nullptr);
2977 RC = TRI->getRegClass(Prefix == "hi" ?
2978 Mips::HI32RegClassID : Mips::LO32RegClassID);
2979 return std::make_pair(*(RC->begin()), RC);
2980 } else if (Prefix.compare(0, 4, "$msa") == 0) {
2981 // Parse $msa(ir|csr|access|save|modify|request|map|unmap)
2983 // No numeric characters follow the name.
2985 return std::make_pair(0U, nullptr);
2987 Reg = StringSwitch<unsigned long long>(Prefix)
2988 .Case("$msair", Mips::MSAIR)
2989 .Case("$msacsr", Mips::MSACSR)
2990 .Case("$msaaccess", Mips::MSAAccess)
2991 .Case("$msasave", Mips::MSASave)
2992 .Case("$msamodify", Mips::MSAModify)
2993 .Case("$msarequest", Mips::MSARequest)
2994 .Case("$msamap", Mips::MSAMap)
2995 .Case("$msaunmap", Mips::MSAUnmap)
2999 return std::make_pair(0U, nullptr);
3001 RC = TRI->getRegClass(Mips::MSACtrlRegClassID);
3002 return std::make_pair(Reg, RC);
3006 return std::make_pair(0U, nullptr);
3008 if (Prefix == "$f") { // Parse $f0-$f31.
3009 // If the size of FP registers is 64-bit or Reg is an even number, select
3010 // the 64-bit register class. Otherwise, select the 32-bit register class.
3011 if (VT == MVT::Other)
3012 VT = (Subtarget->isFP64bit() || !(Reg % 2)) ? MVT::f64 : MVT::f32;
3014 RC = getRegClassFor(VT);
3016 if (RC == &Mips::AFGR64RegClass) {
3017 assert(Reg % 2 == 0);
3020 } else if (Prefix == "$fcc") // Parse $fcc0-$fcc7.
3021 RC = TRI->getRegClass(Mips::FCCRegClassID);
3022 else if (Prefix == "$w") { // Parse $w0-$w31.
3023 RC = getRegClassFor((VT == MVT::Other) ? MVT::v16i8 : VT);
3024 } else { // Parse $0-$31.
3025 assert(Prefix == "$");
3026 RC = getRegClassFor((VT == MVT::Other) ? MVT::i32 : VT);
3029 assert(Reg < RC->getNumRegs());
3030 return std::make_pair(*(RC->begin() + Reg), RC);
3033 /// Given a register class constraint, like 'r', if this corresponds directly
3034 /// to an LLVM register class, return a register of 0 and the register class
3036 std::pair<unsigned, const TargetRegisterClass*> MipsTargetLowering::
3037 getRegForInlineAsmConstraint(const std::string &Constraint, MVT VT) const
3039 if (Constraint.size() == 1) {
3040 switch (Constraint[0]) {
3041 case 'd': // Address register. Same as 'r' unless generating MIPS16 code.
3042 case 'y': // Same as 'r'. Exists for compatibility.
3044 if (VT == MVT::i32 || VT == MVT::i16 || VT == MVT::i8) {
3045 if (Subtarget->inMips16Mode())
3046 return std::make_pair(0U, &Mips::CPU16RegsRegClass);
3047 return std::make_pair(0U, &Mips::GPR32RegClass);
3049 if (VT == MVT::i64 && !isGP64bit())
3050 return std::make_pair(0U, &Mips::GPR32RegClass);
3051 if (VT == MVT::i64 && isGP64bit())
3052 return std::make_pair(0U, &Mips::GPR64RegClass);
3053 // This will generate an error message
3054 return std::make_pair(0U, nullptr);
3055 case 'f': // FPU or MSA register
3056 if (VT == MVT::v16i8)
3057 return std::make_pair(0U, &Mips::MSA128BRegClass);
3058 else if (VT == MVT::v8i16 || VT == MVT::v8f16)
3059 return std::make_pair(0U, &Mips::MSA128HRegClass);
3060 else if (VT == MVT::v4i32 || VT == MVT::v4f32)
3061 return std::make_pair(0U, &Mips::MSA128WRegClass);
3062 else if (VT == MVT::v2i64 || VT == MVT::v2f64)
3063 return std::make_pair(0U, &Mips::MSA128DRegClass);
3064 else if (VT == MVT::f32)
3065 return std::make_pair(0U, &Mips::FGR32RegClass);
3066 else if ((VT == MVT::f64) && (!Subtarget->isSingleFloat())) {
3067 if (Subtarget->isFP64bit())
3068 return std::make_pair(0U, &Mips::FGR64RegClass);
3069 return std::make_pair(0U, &Mips::AFGR64RegClass);
3072 case 'c': // register suitable for indirect jump
3074 return std::make_pair((unsigned)Mips::T9, &Mips::GPR32RegClass);
3075 assert(VT == MVT::i64 && "Unexpected type.");
3076 return std::make_pair((unsigned)Mips::T9_64, &Mips::GPR64RegClass);
3077 case 'l': // register suitable for indirect jump
3079 return std::make_pair((unsigned)Mips::LO0, &Mips::LO32RegClass);
3080 return std::make_pair((unsigned)Mips::LO0_64, &Mips::LO64RegClass);
3081 case 'x': // register suitable for indirect jump
3082 // Fixme: Not triggering the use of both hi and low
3083 // This will generate an error message
3084 return std::make_pair(0U, nullptr);
3088 std::pair<unsigned, const TargetRegisterClass *> R;
3089 R = parseRegForInlineAsmConstraint(Constraint, VT);
3094 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
3097 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
3098 /// vector. If it is invalid, don't add anything to Ops.
3099 void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
3100 std::string &Constraint,
3101 std::vector<SDValue>&Ops,
3102 SelectionDAG &DAG) const {
3105 // Only support length 1 constraints for now.
3106 if (Constraint.length() > 1) return;
3108 char ConstraintLetter = Constraint[0];
3109 switch (ConstraintLetter) {
3110 default: break; // This will fall through to the generic implementation
3111 case 'I': // Signed 16 bit constant
3112 // If this fails, the parent routine will give an error
3113 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3114 EVT Type = Op.getValueType();
3115 int64_t Val = C->getSExtValue();
3116 if (isInt<16>(Val)) {
3117 Result = DAG.getTargetConstant(Val, Type);
3122 case 'J': // integer zero
3123 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3124 EVT Type = Op.getValueType();
3125 int64_t Val = C->getZExtValue();
3127 Result = DAG.getTargetConstant(0, Type);
3132 case 'K': // unsigned 16 bit immediate
3133 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3134 EVT Type = Op.getValueType();
3135 uint64_t Val = (uint64_t)C->getZExtValue();
3136 if (isUInt<16>(Val)) {
3137 Result = DAG.getTargetConstant(Val, Type);
3142 case 'L': // signed 32 bit immediate where lower 16 bits are 0
3143 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3144 EVT Type = Op.getValueType();
3145 int64_t Val = C->getSExtValue();
3146 if ((isInt<32>(Val)) && ((Val & 0xffff) == 0)){
3147 Result = DAG.getTargetConstant(Val, Type);
3152 case 'N': // immediate in the range of -65535 to -1 (inclusive)
3153 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3154 EVT Type = Op.getValueType();
3155 int64_t Val = C->getSExtValue();
3156 if ((Val >= -65535) && (Val <= -1)) {
3157 Result = DAG.getTargetConstant(Val, Type);
3162 case 'O': // signed 15 bit immediate
3163 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3164 EVT Type = Op.getValueType();
3165 int64_t Val = C->getSExtValue();
3166 if ((isInt<15>(Val))) {
3167 Result = DAG.getTargetConstant(Val, Type);
3172 case 'P': // immediate in the range of 1 to 65535 (inclusive)
3173 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3174 EVT Type = Op.getValueType();
3175 int64_t Val = C->getSExtValue();
3176 if ((Val <= 65535) && (Val >= 1)) {
3177 Result = DAG.getTargetConstant(Val, Type);
3184 if (Result.getNode()) {
3185 Ops.push_back(Result);
3189 TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
3192 bool MipsTargetLowering::isLegalAddressingMode(const AddrMode &AM,
3194 // No global is ever allowed as a base.
3199 case 0: // "r+i" or just "i", depending on HasBaseReg.
3202 if (!AM.HasBaseReg) // allow "r+i".
3204 return false; // disallow "r+r" or "r+r+i".
3213 MipsTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
3214 // The Mips target isn't yet aware of offsets.
3218 EVT MipsTargetLowering::getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
3220 bool IsMemset, bool ZeroMemset,
3222 MachineFunction &MF) const {
3223 if (Subtarget->hasMips64())
3229 bool MipsTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3230 if (VT != MVT::f32 && VT != MVT::f64)
3232 if (Imm.isNegZero())
3234 return Imm.isZero();
3237 unsigned MipsTargetLowering::getJumpTableEncoding() const {
3239 return MachineJumpTableInfo::EK_GPRel64BlockAddress;
3241 return TargetLowering::getJumpTableEncoding();
3244 /// This function returns true if CallSym is a long double emulation routine.
3245 static bool isF128SoftLibCall(const char *CallSym) {
3246 const char *const LibCalls[] =
3247 {"__addtf3", "__divtf3", "__eqtf2", "__extenddftf2", "__extendsftf2",
3248 "__fixtfdi", "__fixtfsi", "__fixtfti", "__fixunstfdi", "__fixunstfsi",
3249 "__fixunstfti", "__floatditf", "__floatsitf", "__floattitf",
3250 "__floatunditf", "__floatunsitf", "__floatuntitf", "__getf2", "__gttf2",
3251 "__letf2", "__lttf2", "__multf3", "__netf2", "__powitf2", "__subtf3",
3252 "__trunctfdf2", "__trunctfsf2", "__unordtf2",
3253 "ceill", "copysignl", "cosl", "exp2l", "expl", "floorl", "fmal", "fmodl",
3254 "log10l", "log2l", "logl", "nearbyintl", "powl", "rintl", "sinl", "sqrtl",
3257 const char *const *End = LibCalls + array_lengthof(LibCalls);
3259 // Check that LibCalls is sorted alphabetically.
3260 MipsTargetLowering::LTStr Comp;
3263 for (const char *const *I = LibCalls; I < End - 1; ++I)
3264 assert(Comp(*I, *(I + 1)));
3267 return std::binary_search(LibCalls, End, CallSym, Comp);
3270 /// This function returns true if Ty is fp128 or i128 which was originally a
3272 static bool originalTypeIsF128(const Type *Ty, const SDNode *CallNode) {
3273 if (Ty->isFP128Ty())
3276 const ExternalSymbolSDNode *ES =
3277 dyn_cast_or_null<const ExternalSymbolSDNode>(CallNode);
3279 // If the Ty is i128 and the function being called is a long double emulation
3280 // routine, then the original type is f128.
3281 return (ES && Ty->isIntegerTy(128) && isF128SoftLibCall(ES->getSymbol()));
3284 MipsTargetLowering::MipsCC::SpecialCallingConvType
3285 MipsTargetLowering::getSpecialCallingConv(SDValue Callee) const {
3286 MipsCC::SpecialCallingConvType SpecialCallingConv =
3287 MipsCC::NoSpecialCallingConv;
3288 if (Subtarget->inMips16HardFloat()) {
3289 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
3290 llvm::StringRef Sym = G->getGlobal()->getName();
3291 Function *F = G->getGlobal()->getParent()->getFunction(Sym);
3292 if (F && F->hasFnAttribute("__Mips16RetHelper")) {
3293 SpecialCallingConv = MipsCC::Mips16RetHelperConv;
3297 return SpecialCallingConv;
3300 MipsTargetLowering::MipsCC::MipsCC(
3301 CallingConv::ID CC, bool IsO32_, bool IsFP64_, CCState &Info,
3302 MipsCC::SpecialCallingConvType SpecialCallingConv_)
3303 : CCInfo(Info), CallConv(CC), IsO32(IsO32_), IsFP64(IsFP64_),
3304 SpecialCallingConv(SpecialCallingConv_){
3305 // Pre-allocate reserved argument area.
3306 CCInfo.AllocateStack(reservedArgArea(), 1);
3310 void MipsTargetLowering::MipsCC::
3311 analyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Args,
3312 bool IsVarArg, bool IsSoftFloat, const SDNode *CallNode,
3313 std::vector<ArgListEntry> &FuncArgs) {
3314 assert((CallConv != CallingConv::Fast || !IsVarArg) &&
3315 "CallingConv::Fast shouldn't be used for vararg functions.");
3317 unsigned NumOpnds = Args.size();
3318 llvm::CCAssignFn *FixedFn = fixedArgFn(), *VarFn = varArgFn();
3320 for (unsigned I = 0; I != NumOpnds; ++I) {
3321 MVT ArgVT = Args[I].VT;
3322 ISD::ArgFlagsTy ArgFlags = Args[I].Flags;
3325 if (ArgFlags.isByVal()) {
3326 handleByValArg(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags);
3330 if (IsVarArg && !Args[I].IsFixed)
3331 R = VarFn(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo);
3333 MVT RegVT = getRegVT(ArgVT, FuncArgs[Args[I].OrigArgIndex].Ty, CallNode,
3335 R = FixedFn(I, ArgVT, RegVT, CCValAssign::Full, ArgFlags, CCInfo);
3340 dbgs() << "Call operand #" << I << " has unhandled type "
3341 << EVT(ArgVT).getEVTString();
3343 llvm_unreachable(nullptr);
3348 void MipsTargetLowering::MipsCC::
3349 analyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Args,
3350 bool IsSoftFloat, Function::const_arg_iterator FuncArg) {
3351 unsigned NumArgs = Args.size();
3352 llvm::CCAssignFn *FixedFn = fixedArgFn();
3353 unsigned CurArgIdx = 0;
3355 for (unsigned I = 0; I != NumArgs; ++I) {
3356 MVT ArgVT = Args[I].VT;
3357 ISD::ArgFlagsTy ArgFlags = Args[I].Flags;
3358 std::advance(FuncArg, Args[I].OrigArgIndex - CurArgIdx);
3359 CurArgIdx = Args[I].OrigArgIndex;
3361 if (ArgFlags.isByVal()) {
3362 handleByValArg(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags);
3366 MVT RegVT = getRegVT(ArgVT, FuncArg->getType(), nullptr, IsSoftFloat);
3368 if (!FixedFn(I, ArgVT, RegVT, CCValAssign::Full, ArgFlags, CCInfo))
3372 dbgs() << "Formal Arg #" << I << " has unhandled type "
3373 << EVT(ArgVT).getEVTString();
3375 llvm_unreachable(nullptr);
3379 template<typename Ty>
3380 void MipsTargetLowering::MipsCC::
3381 analyzeReturn(const SmallVectorImpl<Ty> &RetVals, bool IsSoftFloat,
3382 const SDNode *CallNode, const Type *RetTy) const {
3385 if (IsSoftFloat && originalTypeIsF128(RetTy, CallNode))
3386 Fn = RetCC_F128Soft;
3390 for (unsigned I = 0, E = RetVals.size(); I < E; ++I) {
3391 MVT VT = RetVals[I].VT;
3392 ISD::ArgFlagsTy Flags = RetVals[I].Flags;
3393 MVT RegVT = this->getRegVT(VT, RetTy, CallNode, IsSoftFloat);
3395 if (Fn(I, VT, RegVT, CCValAssign::Full, Flags, this->CCInfo)) {
3397 dbgs() << "Call result #" << I << " has unhandled type "
3398 << EVT(VT).getEVTString() << '\n';
3400 llvm_unreachable(nullptr);
3405 void MipsTargetLowering::MipsCC::
3406 analyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins, bool IsSoftFloat,
3407 const SDNode *CallNode, const Type *RetTy) const {
3408 analyzeReturn(Ins, IsSoftFloat, CallNode, RetTy);
3411 void MipsTargetLowering::MipsCC::
3412 analyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs, bool IsSoftFloat,
3413 const Type *RetTy) const {
3414 analyzeReturn(Outs, IsSoftFloat, nullptr, RetTy);
3417 void MipsTargetLowering::MipsCC::handleByValArg(unsigned ValNo, MVT ValVT,
3419 CCValAssign::LocInfo LocInfo,
3420 ISD::ArgFlagsTy ArgFlags) {
3421 assert(ArgFlags.getByValSize() && "Byval argument's size shouldn't be 0.");
3423 struct ByValArgInfo ByVal;
3424 unsigned RegSize = regSize();
3425 unsigned ByValSize = RoundUpToAlignment(ArgFlags.getByValSize(), RegSize);
3426 unsigned Align = std::min(std::max(ArgFlags.getByValAlign(), RegSize),
3429 if (useRegsForByval())
3430 allocateRegs(ByVal, ByValSize, Align);
3432 // Allocate space on caller's stack.
3433 ByVal.Address = CCInfo.AllocateStack(ByValSize - RegSize * ByVal.NumRegs,
3435 CCInfo.addLoc(CCValAssign::getMem(ValNo, ValVT, ByVal.Address, LocVT,
3437 ByValArgs.push_back(ByVal);
3440 unsigned MipsTargetLowering::MipsCC::numIntArgRegs() const {
3441 return IsO32 ? array_lengthof(O32IntRegs) : array_lengthof(Mips64IntRegs);
3444 unsigned MipsTargetLowering::MipsCC::reservedArgArea() const {
3445 return (IsO32 && (CallConv != CallingConv::Fast)) ? 16 : 0;
3448 const MCPhysReg *MipsTargetLowering::MipsCC::intArgRegs() const {
3449 return IsO32 ? O32IntRegs : Mips64IntRegs;
3452 llvm::CCAssignFn *MipsTargetLowering::MipsCC::fixedArgFn() const {
3453 if (CallConv == CallingConv::Fast)
3454 return CC_Mips_FastCC;
3456 if (SpecialCallingConv == Mips16RetHelperConv)
3457 return CC_Mips16RetHelper;
3458 return IsO32 ? (IsFP64 ? CC_MipsO32_FP64 : CC_MipsO32_FP32) : CC_MipsN;
3461 llvm::CCAssignFn *MipsTargetLowering::MipsCC::varArgFn() const {
3462 return IsO32 ? (IsFP64 ? CC_MipsO32_FP64 : CC_MipsO32_FP32) : CC_MipsN_VarArg;
3465 const MCPhysReg *MipsTargetLowering::MipsCC::shadowRegs() const {
3466 return IsO32 ? O32IntRegs : Mips64DPRegs;
3469 void MipsTargetLowering::MipsCC::allocateRegs(ByValArgInfo &ByVal,
3472 unsigned RegSize = regSize(), NumIntArgRegs = numIntArgRegs();
3473 const MCPhysReg *IntArgRegs = intArgRegs(), *ShadowRegs = shadowRegs();
3474 assert(!(ByValSize % RegSize) && !(Align % RegSize) &&
3475 "Byval argument's size and alignment should be a multiple of"
3478 ByVal.FirstIdx = CCInfo.getFirstUnallocated(IntArgRegs, NumIntArgRegs);
3480 // If Align > RegSize, the first arg register must be even.
3481 if ((Align > RegSize) && (ByVal.FirstIdx % 2)) {
3482 CCInfo.AllocateReg(IntArgRegs[ByVal.FirstIdx], ShadowRegs[ByVal.FirstIdx]);
3486 // Mark the registers allocated.
3487 for (unsigned I = ByVal.FirstIdx; ByValSize && (I < NumIntArgRegs);
3488 ByValSize -= RegSize, ++I, ++ByVal.NumRegs)
3489 CCInfo.AllocateReg(IntArgRegs[I], ShadowRegs[I]);
3492 MVT MipsTargetLowering::MipsCC::getRegVT(MVT VT, const Type *OrigTy,
3493 const SDNode *CallNode,
3494 bool IsSoftFloat) const {
3495 if (IsSoftFloat || IsO32)
3498 // Check if the original type was fp128.
3499 if (originalTypeIsF128(OrigTy, CallNode)) {
3500 assert(VT == MVT::i64);
3507 void MipsTargetLowering::
3508 copyByValRegs(SDValue Chain, SDLoc DL, std::vector<SDValue> &OutChains,
3509 SelectionDAG &DAG, const ISD::ArgFlagsTy &Flags,
3510 SmallVectorImpl<SDValue> &InVals, const Argument *FuncArg,
3511 const MipsCC &CC, const ByValArgInfo &ByVal) const {
3512 MachineFunction &MF = DAG.getMachineFunction();
3513 MachineFrameInfo *MFI = MF.getFrameInfo();
3514 unsigned RegAreaSize = ByVal.NumRegs * CC.regSize();
3515 unsigned FrameObjSize = std::max(Flags.getByValSize(), RegAreaSize);
3519 FrameObjOffset = (int)CC.reservedArgArea() -
3520 (int)((CC.numIntArgRegs() - ByVal.FirstIdx) * CC.regSize());
3522 FrameObjOffset = ByVal.Address;
3524 // Create frame object.
3525 EVT PtrTy = getPointerTy();
3526 int FI = MFI->CreateFixedObject(FrameObjSize, FrameObjOffset, true);
3527 SDValue FIN = DAG.getFrameIndex(FI, PtrTy);
3528 InVals.push_back(FIN);
3533 // Copy arg registers.
3534 MVT RegTy = MVT::getIntegerVT(CC.regSize() * 8);
3535 const TargetRegisterClass *RC = getRegClassFor(RegTy);
3537 for (unsigned I = 0; I < ByVal.NumRegs; ++I) {
3538 unsigned ArgReg = CC.intArgRegs()[ByVal.FirstIdx + I];
3539 unsigned VReg = addLiveIn(MF, ArgReg, RC);
3540 unsigned Offset = I * CC.regSize();
3541 SDValue StorePtr = DAG.getNode(ISD::ADD, DL, PtrTy, FIN,
3542 DAG.getConstant(Offset, PtrTy));
3543 SDValue Store = DAG.getStore(Chain, DL, DAG.getRegister(VReg, RegTy),
3544 StorePtr, MachinePointerInfo(FuncArg, Offset),
3546 OutChains.push_back(Store);
3550 // Copy byVal arg to registers and stack.
3551 void MipsTargetLowering::
3552 passByValArg(SDValue Chain, SDLoc DL,
3553 std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
3554 SmallVectorImpl<SDValue> &MemOpChains, SDValue StackPtr,
3555 MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg,
3556 const MipsCC &CC, const ByValArgInfo &ByVal,
3557 const ISD::ArgFlagsTy &Flags, bool isLittle) const {
3558 unsigned ByValSizeInBytes = Flags.getByValSize();
3559 unsigned OffsetInBytes = 0; // From beginning of struct
3560 unsigned RegSizeInBytes = CC.regSize();
3561 unsigned Alignment = std::min(Flags.getByValAlign(), RegSizeInBytes);
3562 EVT PtrTy = getPointerTy(), RegTy = MVT::getIntegerVT(RegSizeInBytes * 8);
3564 if (ByVal.NumRegs) {
3565 const MCPhysReg *ArgRegs = CC.intArgRegs();
3566 bool LeftoverBytes = (ByVal.NumRegs * RegSizeInBytes > ByValSizeInBytes);
3569 // Copy words to registers.
3570 for (; I < ByVal.NumRegs - LeftoverBytes;
3571 ++I, OffsetInBytes += RegSizeInBytes) {
3572 SDValue LoadPtr = DAG.getNode(ISD::ADD, DL, PtrTy, Arg,
3573 DAG.getConstant(OffsetInBytes, PtrTy));
3574 SDValue LoadVal = DAG.getLoad(RegTy, DL, Chain, LoadPtr,
3575 MachinePointerInfo(), false, false, false,
3577 MemOpChains.push_back(LoadVal.getValue(1));
3578 unsigned ArgReg = ArgRegs[ByVal.FirstIdx + I];
3579 RegsToPass.push_back(std::make_pair(ArgReg, LoadVal));
3582 // Return if the struct has been fully copied.
3583 if (ByValSizeInBytes == OffsetInBytes)
3586 // Copy the remainder of the byval argument with sub-word loads and shifts.
3587 if (LeftoverBytes) {
3588 assert((ByValSizeInBytes > OffsetInBytes) &&
3589 (ByValSizeInBytes < OffsetInBytes + RegSizeInBytes) &&
3590 "Size of the remainder should be smaller than RegSizeInBytes.");
3593 for (unsigned LoadSizeInBytes = RegSizeInBytes / 2, TotalBytesLoaded = 0;
3594 OffsetInBytes < ByValSizeInBytes; LoadSizeInBytes /= 2) {
3595 unsigned RemainingSizeInBytes = ByValSizeInBytes - OffsetInBytes;
3597 if (RemainingSizeInBytes < LoadSizeInBytes)
3601 SDValue LoadPtr = DAG.getNode(ISD::ADD, DL, PtrTy, Arg,
3602 DAG.getConstant(OffsetInBytes, PtrTy));
3603 SDValue LoadVal = DAG.getExtLoad(
3604 ISD::ZEXTLOAD, DL, RegTy, Chain, LoadPtr, MachinePointerInfo(),
3605 MVT::getIntegerVT(LoadSizeInBytes * 8), false, false, Alignment);
3606 MemOpChains.push_back(LoadVal.getValue(1));
3608 // Shift the loaded value.
3612 Shamt = TotalBytesLoaded * 8;
3614 Shamt = (RegSizeInBytes - (TotalBytesLoaded + LoadSizeInBytes)) * 8;
3616 SDValue Shift = DAG.getNode(ISD::SHL, DL, RegTy, LoadVal,
3617 DAG.getConstant(Shamt, MVT::i32));
3620 Val = DAG.getNode(ISD::OR, DL, RegTy, Val, Shift);
3624 OffsetInBytes += LoadSizeInBytes;
3625 TotalBytesLoaded += LoadSizeInBytes;
3626 Alignment = std::min(Alignment, LoadSizeInBytes);
3629 unsigned ArgReg = ArgRegs[ByVal.FirstIdx + I];
3630 RegsToPass.push_back(std::make_pair(ArgReg, Val));
3635 // Copy remainder of byval arg to it with memcpy.
3636 unsigned MemCpySize = ByValSizeInBytes - OffsetInBytes;
3637 SDValue Src = DAG.getNode(ISD::ADD, DL, PtrTy, Arg,
3638 DAG.getConstant(OffsetInBytes, PtrTy));
3639 SDValue Dst = DAG.getNode(ISD::ADD, DL, PtrTy, StackPtr,
3640 DAG.getIntPtrConstant(ByVal.Address));
3641 Chain = DAG.getMemcpy(Chain, DL, Dst, Src, DAG.getConstant(MemCpySize, PtrTy),
3642 Alignment, /*isVolatile=*/false, /*AlwaysInline=*/false,
3643 MachinePointerInfo(), MachinePointerInfo());
3644 MemOpChains.push_back(Chain);
3647 void MipsTargetLowering::writeVarArgRegs(std::vector<SDValue> &OutChains,
3648 const MipsCC &CC, SDValue Chain,
3649 SDLoc DL, SelectionDAG &DAG) const {
3650 unsigned NumRegs = CC.numIntArgRegs();
3651 const MCPhysReg *ArgRegs = CC.intArgRegs();
3652 const CCState &CCInfo = CC.getCCInfo();
3653 unsigned Idx = CCInfo.getFirstUnallocated(ArgRegs, NumRegs);
3654 unsigned RegSize = CC.regSize();
3655 MVT RegTy = MVT::getIntegerVT(RegSize * 8);
3656 const TargetRegisterClass *RC = getRegClassFor(RegTy);
3657 MachineFunction &MF = DAG.getMachineFunction();
3658 MachineFrameInfo *MFI = MF.getFrameInfo();
3659 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
3661 // Offset of the first variable argument from stack pointer.
3665 VaArgOffset = RoundUpToAlignment(CCInfo.getNextStackOffset(), RegSize);
3667 VaArgOffset = (int)CC.reservedArgArea() - (int)(RegSize * (NumRegs - Idx));
3669 // Record the frame index of the first variable argument
3670 // which is a value necessary to VASTART.
3671 int FI = MFI->CreateFixedObject(RegSize, VaArgOffset, true);
3672 MipsFI->setVarArgsFrameIndex(FI);
3674 // Copy the integer registers that have not been used for argument passing
3675 // to the argument register save area. For O32, the save area is allocated
3676 // in the caller's stack frame, while for N32/64, it is allocated in the
3677 // callee's stack frame.
3678 for (unsigned I = Idx; I < NumRegs; ++I, VaArgOffset += RegSize) {
3679 unsigned Reg = addLiveIn(MF, ArgRegs[I], RC);
3680 SDValue ArgValue = DAG.getCopyFromReg(Chain, DL, Reg, RegTy);
3681 FI = MFI->CreateFixedObject(RegSize, VaArgOffset, true);
3682 SDValue PtrOff = DAG.getFrameIndex(FI, getPointerTy());
3683 SDValue Store = DAG.getStore(Chain, DL, ArgValue, PtrOff,
3684 MachinePointerInfo(), false, false, 0);
3685 cast<StoreSDNode>(Store.getNode())->getMemOperand()->setValue((Value*)nullptr);
3686 OutChains.push_back(Store);