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);
254 if (Subtarget->isGP64bit()) {
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);
266 if (!Subtarget->isGP64bit()) {
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);
273 if (Subtarget->isGP64bit())
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);
372 if (Subtarget->isGP64bit()) {
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(Subtarget->isGP64bit() ? 3 : 2);
390 setStackPointerRegisterToSaveRestore(Subtarget->isABI_N64() ? Mips::SP_64
393 setExceptionPointerRegister(Subtarget->isABI_N64() ? Mips::A0_64 : Mips::A0);
394 setExceptionSelectorRegister(Subtarget->isABI_N64() ? Mips::A1_64 : Mips::A1);
396 MaxStoresPerMemcpy = 16;
398 isMicroMips = Subtarget->inMicroMipsMode();
401 const MipsTargetLowering *MipsTargetLowering::create(MipsTargetMachine &TM) {
402 if (TM.getSubtargetImpl()->inMips16Mode())
403 return llvm::createMips16TargetLowering(TM);
405 return llvm::createMipsSETargetLowering(TM);
408 // Create a fast isel object.
410 MipsTargetLowering::createFastISel(FunctionLoweringInfo &funcInfo,
411 const TargetLibraryInfo *libInfo) const {
412 if (!EnableMipsFastISel)
413 return TargetLowering::createFastISel(funcInfo, libInfo);
414 return Mips::createFastISel(funcInfo, libInfo);
417 EVT MipsTargetLowering::getSetCCResultType(LLVMContext &, EVT VT) const {
420 return VT.changeVectorElementTypeToInteger();
423 static SDValue performDivRemCombine(SDNode *N, SelectionDAG &DAG,
424 TargetLowering::DAGCombinerInfo &DCI,
425 const MipsSubtarget *Subtarget) {
426 if (DCI.isBeforeLegalizeOps())
429 EVT Ty = N->getValueType(0);
430 unsigned LO = (Ty == MVT::i32) ? Mips::LO0 : Mips::LO0_64;
431 unsigned HI = (Ty == MVT::i32) ? Mips::HI0 : Mips::HI0_64;
432 unsigned Opc = N->getOpcode() == ISD::SDIVREM ? MipsISD::DivRem16 :
436 SDValue DivRem = DAG.getNode(Opc, DL, MVT::Glue,
437 N->getOperand(0), N->getOperand(1));
438 SDValue InChain = DAG.getEntryNode();
439 SDValue InGlue = DivRem;
442 if (N->hasAnyUseOfValue(0)) {
443 SDValue CopyFromLo = DAG.getCopyFromReg(InChain, DL, LO, Ty,
445 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), CopyFromLo);
446 InChain = CopyFromLo.getValue(1);
447 InGlue = CopyFromLo.getValue(2);
451 if (N->hasAnyUseOfValue(1)) {
452 SDValue CopyFromHi = DAG.getCopyFromReg(InChain, DL,
454 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), CopyFromHi);
460 static Mips::CondCode condCodeToFCC(ISD::CondCode CC) {
462 default: llvm_unreachable("Unknown fp condition code!");
464 case ISD::SETOEQ: return Mips::FCOND_OEQ;
465 case ISD::SETUNE: return Mips::FCOND_UNE;
467 case ISD::SETOLT: return Mips::FCOND_OLT;
469 case ISD::SETOGT: return Mips::FCOND_OGT;
471 case ISD::SETOLE: return Mips::FCOND_OLE;
473 case ISD::SETOGE: return Mips::FCOND_OGE;
474 case ISD::SETULT: return Mips::FCOND_ULT;
475 case ISD::SETULE: return Mips::FCOND_ULE;
476 case ISD::SETUGT: return Mips::FCOND_UGT;
477 case ISD::SETUGE: return Mips::FCOND_UGE;
478 case ISD::SETUO: return Mips::FCOND_UN;
479 case ISD::SETO: return Mips::FCOND_OR;
481 case ISD::SETONE: return Mips::FCOND_ONE;
482 case ISD::SETUEQ: return Mips::FCOND_UEQ;
487 /// This function returns true if the floating point conditional branches and
488 /// conditional moves which use condition code CC should be inverted.
489 static bool invertFPCondCodeUser(Mips::CondCode CC) {
490 if (CC >= Mips::FCOND_F && CC <= Mips::FCOND_NGT)
493 assert((CC >= Mips::FCOND_T && CC <= Mips::FCOND_GT) &&
494 "Illegal Condition Code");
499 // Creates and returns an FPCmp node from a setcc node.
500 // Returns Op if setcc is not a floating point comparison.
501 static SDValue createFPCmp(SelectionDAG &DAG, const SDValue &Op) {
502 // must be a SETCC node
503 if (Op.getOpcode() != ISD::SETCC)
506 SDValue LHS = Op.getOperand(0);
508 if (!LHS.getValueType().isFloatingPoint())
511 SDValue RHS = Op.getOperand(1);
514 // Assume the 3rd operand is a CondCodeSDNode. Add code to check the type of
515 // node if necessary.
516 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
518 return DAG.getNode(MipsISD::FPCmp, DL, MVT::Glue, LHS, RHS,
519 DAG.getConstant(condCodeToFCC(CC), MVT::i32));
522 // Creates and returns a CMovFPT/F node.
523 static SDValue createCMovFP(SelectionDAG &DAG, SDValue Cond, SDValue True,
524 SDValue False, SDLoc DL) {
525 ConstantSDNode *CC = cast<ConstantSDNode>(Cond.getOperand(2));
526 bool invert = invertFPCondCodeUser((Mips::CondCode)CC->getSExtValue());
527 SDValue FCC0 = DAG.getRegister(Mips::FCC0, MVT::i32);
529 return DAG.getNode((invert ? MipsISD::CMovFP_F : MipsISD::CMovFP_T), DL,
530 True.getValueType(), True, FCC0, False, Cond);
533 static SDValue performSELECTCombine(SDNode *N, SelectionDAG &DAG,
534 TargetLowering::DAGCombinerInfo &DCI,
535 const MipsSubtarget *Subtarget) {
536 if (DCI.isBeforeLegalizeOps())
539 SDValue SetCC = N->getOperand(0);
541 if ((SetCC.getOpcode() != ISD::SETCC) ||
542 !SetCC.getOperand(0).getValueType().isInteger())
545 SDValue False = N->getOperand(2);
546 EVT FalseTy = False.getValueType();
548 if (!FalseTy.isInteger())
551 ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(False);
553 // If the RHS (False) is 0, we swap the order of the operands
554 // of ISD::SELECT (obviously also inverting the condition) so that we can
555 // take advantage of conditional moves using the $0 register.
557 // return (a != 0) ? x : 0;
565 if (!FalseC->getZExtValue()) {
566 ISD::CondCode CC = cast<CondCodeSDNode>(SetCC.getOperand(2))->get();
567 SDValue True = N->getOperand(1);
569 SetCC = DAG.getSetCC(DL, SetCC.getValueType(), SetCC.getOperand(0),
570 SetCC.getOperand(1), ISD::getSetCCInverse(CC, true));
572 return DAG.getNode(ISD::SELECT, DL, FalseTy, SetCC, False, True);
575 // If both operands are integer constants there's a possibility that we
576 // can do some interesting optimizations.
577 SDValue True = N->getOperand(1);
578 ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(True);
580 if (!TrueC || !True.getValueType().isInteger())
583 // We'll also ignore MVT::i64 operands as this optimizations proves
584 // to be ineffective because of the required sign extensions as the result
585 // of a SETCC operator is always MVT::i32 for non-vector types.
586 if (True.getValueType() == MVT::i64)
589 int64_t Diff = TrueC->getSExtValue() - FalseC->getSExtValue();
591 // 1) (a < x) ? y : y-1
593 // addiu $reg2, $reg1, y-1
595 return DAG.getNode(ISD::ADD, DL, SetCC.getValueType(), SetCC, False);
597 // 2) (a < x) ? y-1 : y
599 // xor $reg1, $reg1, 1
600 // addiu $reg2, $reg1, y-1
602 ISD::CondCode CC = cast<CondCodeSDNode>(SetCC.getOperand(2))->get();
603 SetCC = DAG.getSetCC(DL, SetCC.getValueType(), SetCC.getOperand(0),
604 SetCC.getOperand(1), ISD::getSetCCInverse(CC, true));
605 return DAG.getNode(ISD::ADD, DL, SetCC.getValueType(), SetCC, True);
608 // Couldn't optimize.
612 static SDValue performANDCombine(SDNode *N, SelectionDAG &DAG,
613 TargetLowering::DAGCombinerInfo &DCI,
614 const MipsSubtarget *Subtarget) {
615 // Pattern match EXT.
616 // $dst = and ((sra or srl) $src , pos), (2**size - 1)
617 // => ext $dst, $src, size, pos
618 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasExtractInsert())
621 SDValue ShiftRight = N->getOperand(0), Mask = N->getOperand(1);
622 unsigned ShiftRightOpc = ShiftRight.getOpcode();
624 // Op's first operand must be a shift right.
625 if (ShiftRightOpc != ISD::SRA && ShiftRightOpc != ISD::SRL)
628 // The second operand of the shift must be an immediate.
630 if (!(CN = dyn_cast<ConstantSDNode>(ShiftRight.getOperand(1))))
633 uint64_t Pos = CN->getZExtValue();
634 uint64_t SMPos, SMSize;
636 // Op's second operand must be a shifted mask.
637 if (!(CN = dyn_cast<ConstantSDNode>(Mask)) ||
638 !isShiftedMask(CN->getZExtValue(), SMPos, SMSize))
641 // Return if the shifted mask does not start at bit 0 or the sum of its size
642 // and Pos exceeds the word's size.
643 EVT ValTy = N->getValueType(0);
644 if (SMPos != 0 || Pos + SMSize > ValTy.getSizeInBits())
647 return DAG.getNode(MipsISD::Ext, SDLoc(N), ValTy,
648 ShiftRight.getOperand(0), DAG.getConstant(Pos, MVT::i32),
649 DAG.getConstant(SMSize, MVT::i32));
652 static SDValue performORCombine(SDNode *N, SelectionDAG &DAG,
653 TargetLowering::DAGCombinerInfo &DCI,
654 const MipsSubtarget *Subtarget) {
655 // Pattern match INS.
656 // $dst = or (and $src1 , mask0), (and (shl $src, pos), mask1),
657 // where mask1 = (2**size - 1) << pos, mask0 = ~mask1
658 // => ins $dst, $src, size, pos, $src1
659 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasExtractInsert())
662 SDValue And0 = N->getOperand(0), And1 = N->getOperand(1);
663 uint64_t SMPos0, SMSize0, SMPos1, SMSize1;
666 // See if Op's first operand matches (and $src1 , mask0).
667 if (And0.getOpcode() != ISD::AND)
670 if (!(CN = dyn_cast<ConstantSDNode>(And0.getOperand(1))) ||
671 !isShiftedMask(~CN->getSExtValue(), SMPos0, SMSize0))
674 // See if Op's second operand matches (and (shl $src, pos), mask1).
675 if (And1.getOpcode() != ISD::AND)
678 if (!(CN = dyn_cast<ConstantSDNode>(And1.getOperand(1))) ||
679 !isShiftedMask(CN->getZExtValue(), SMPos1, SMSize1))
682 // The shift masks must have the same position and size.
683 if (SMPos0 != SMPos1 || SMSize0 != SMSize1)
686 SDValue Shl = And1.getOperand(0);
687 if (Shl.getOpcode() != ISD::SHL)
690 if (!(CN = dyn_cast<ConstantSDNode>(Shl.getOperand(1))))
693 unsigned Shamt = CN->getZExtValue();
695 // Return if the shift amount and the first bit position of mask are not the
697 EVT ValTy = N->getValueType(0);
698 if ((Shamt != SMPos0) || (SMPos0 + SMSize0 > ValTy.getSizeInBits()))
701 return DAG.getNode(MipsISD::Ins, SDLoc(N), ValTy, Shl.getOperand(0),
702 DAG.getConstant(SMPos0, MVT::i32),
703 DAG.getConstant(SMSize0, MVT::i32), And0.getOperand(0));
706 static SDValue performADDCombine(SDNode *N, SelectionDAG &DAG,
707 TargetLowering::DAGCombinerInfo &DCI,
708 const MipsSubtarget *Subtarget) {
709 // (add v0, (add v1, abs_lo(tjt))) => (add (add v0, v1), abs_lo(tjt))
711 if (DCI.isBeforeLegalizeOps())
714 SDValue Add = N->getOperand(1);
716 if (Add.getOpcode() != ISD::ADD)
719 SDValue Lo = Add.getOperand(1);
721 if ((Lo.getOpcode() != MipsISD::Lo) ||
722 (Lo.getOperand(0).getOpcode() != ISD::TargetJumpTable))
725 EVT ValTy = N->getValueType(0);
728 SDValue Add1 = DAG.getNode(ISD::ADD, DL, ValTy, N->getOperand(0),
730 return DAG.getNode(ISD::ADD, DL, ValTy, Add1, Lo);
733 SDValue MipsTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI)
735 SelectionDAG &DAG = DCI.DAG;
736 unsigned Opc = N->getOpcode();
742 return performDivRemCombine(N, DAG, DCI, Subtarget);
744 return performSELECTCombine(N, DAG, DCI, Subtarget);
746 return performANDCombine(N, DAG, DCI, Subtarget);
748 return performORCombine(N, DAG, DCI, Subtarget);
750 return performADDCombine(N, DAG, DCI, Subtarget);
757 MipsTargetLowering::LowerOperationWrapper(SDNode *N,
758 SmallVectorImpl<SDValue> &Results,
759 SelectionDAG &DAG) const {
760 SDValue Res = LowerOperation(SDValue(N, 0), DAG);
762 for (unsigned I = 0, E = Res->getNumValues(); I != E; ++I)
763 Results.push_back(Res.getValue(I));
767 MipsTargetLowering::ReplaceNodeResults(SDNode *N,
768 SmallVectorImpl<SDValue> &Results,
769 SelectionDAG &DAG) const {
770 return LowerOperationWrapper(N, Results, DAG);
773 SDValue MipsTargetLowering::
774 LowerOperation(SDValue Op, SelectionDAG &DAG) const
776 switch (Op.getOpcode())
778 case ISD::BR_JT: return lowerBR_JT(Op, DAG);
779 case ISD::BRCOND: return lowerBRCOND(Op, DAG);
780 case ISD::ConstantPool: return lowerConstantPool(Op, DAG);
781 case ISD::GlobalAddress: return lowerGlobalAddress(Op, DAG);
782 case ISD::BlockAddress: return lowerBlockAddress(Op, DAG);
783 case ISD::GlobalTLSAddress: return lowerGlobalTLSAddress(Op, DAG);
784 case ISD::JumpTable: return lowerJumpTable(Op, DAG);
785 case ISD::SELECT: return lowerSELECT(Op, DAG);
786 case ISD::SELECT_CC: return lowerSELECT_CC(Op, DAG);
787 case ISD::SETCC: return lowerSETCC(Op, DAG);
788 case ISD::VASTART: return lowerVASTART(Op, DAG);
789 case ISD::FCOPYSIGN: return lowerFCOPYSIGN(Op, DAG);
790 case ISD::FRAMEADDR: return lowerFRAMEADDR(Op, DAG);
791 case ISD::RETURNADDR: return lowerRETURNADDR(Op, DAG);
792 case ISD::EH_RETURN: return lowerEH_RETURN(Op, DAG);
793 case ISD::ATOMIC_FENCE: return lowerATOMIC_FENCE(Op, DAG);
794 case ISD::SHL_PARTS: return lowerShiftLeftParts(Op, DAG);
795 case ISD::SRA_PARTS: return lowerShiftRightParts(Op, DAG, true);
796 case ISD::SRL_PARTS: return lowerShiftRightParts(Op, DAG, false);
797 case ISD::LOAD: return lowerLOAD(Op, DAG);
798 case ISD::STORE: return lowerSTORE(Op, DAG);
799 case ISD::ADD: return lowerADD(Op, DAG);
800 case ISD::FP_TO_SINT: return lowerFP_TO_SINT(Op, DAG);
805 //===----------------------------------------------------------------------===//
806 // Lower helper functions
807 //===----------------------------------------------------------------------===//
809 // addLiveIn - This helper function adds the specified physical register to the
810 // MachineFunction as a live in value. It also creates a corresponding
811 // virtual register for it.
813 addLiveIn(MachineFunction &MF, unsigned PReg, const TargetRegisterClass *RC)
815 unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
816 MF.getRegInfo().addLiveIn(PReg, VReg);
820 static MachineBasicBlock *insertDivByZeroTrap(MachineInstr *MI,
821 MachineBasicBlock &MBB,
822 const TargetInstrInfo &TII,
827 // Insert instruction "teq $divisor_reg, $zero, 7".
828 MachineBasicBlock::iterator I(MI);
829 MachineInstrBuilder MIB;
830 MachineOperand &Divisor = MI->getOperand(2);
831 MIB = BuildMI(MBB, std::next(I), MI->getDebugLoc(), TII.get(Mips::TEQ))
832 .addReg(Divisor.getReg(), getKillRegState(Divisor.isKill()))
833 .addReg(Mips::ZERO).addImm(7);
835 // Use the 32-bit sub-register if this is a 64-bit division.
837 MIB->getOperand(0).setSubReg(Mips::sub_32);
839 // Clear Divisor's kill flag.
840 Divisor.setIsKill(false);
842 // We would normally delete the original instruction here but in this case
843 // we only needed to inject an additional instruction rather than replace it.
849 MipsTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
850 MachineBasicBlock *BB) const {
851 switch (MI->getOpcode()) {
853 llvm_unreachable("Unexpected instr type to insert");
854 case Mips::ATOMIC_LOAD_ADD_I8:
855 return emitAtomicBinaryPartword(MI, BB, 1, Mips::ADDu);
856 case Mips::ATOMIC_LOAD_ADD_I16:
857 return emitAtomicBinaryPartword(MI, BB, 2, Mips::ADDu);
858 case Mips::ATOMIC_LOAD_ADD_I32:
859 return emitAtomicBinary(MI, BB, 4, Mips::ADDu);
860 case Mips::ATOMIC_LOAD_ADD_I64:
861 return emitAtomicBinary(MI, BB, 8, Mips::DADDu);
863 case Mips::ATOMIC_LOAD_AND_I8:
864 return emitAtomicBinaryPartword(MI, BB, 1, Mips::AND);
865 case Mips::ATOMIC_LOAD_AND_I16:
866 return emitAtomicBinaryPartword(MI, BB, 2, Mips::AND);
867 case Mips::ATOMIC_LOAD_AND_I32:
868 return emitAtomicBinary(MI, BB, 4, Mips::AND);
869 case Mips::ATOMIC_LOAD_AND_I64:
870 return emitAtomicBinary(MI, BB, 8, Mips::AND64);
872 case Mips::ATOMIC_LOAD_OR_I8:
873 return emitAtomicBinaryPartword(MI, BB, 1, Mips::OR);
874 case Mips::ATOMIC_LOAD_OR_I16:
875 return emitAtomicBinaryPartword(MI, BB, 2, Mips::OR);
876 case Mips::ATOMIC_LOAD_OR_I32:
877 return emitAtomicBinary(MI, BB, 4, Mips::OR);
878 case Mips::ATOMIC_LOAD_OR_I64:
879 return emitAtomicBinary(MI, BB, 8, Mips::OR64);
881 case Mips::ATOMIC_LOAD_XOR_I8:
882 return emitAtomicBinaryPartword(MI, BB, 1, Mips::XOR);
883 case Mips::ATOMIC_LOAD_XOR_I16:
884 return emitAtomicBinaryPartword(MI, BB, 2, Mips::XOR);
885 case Mips::ATOMIC_LOAD_XOR_I32:
886 return emitAtomicBinary(MI, BB, 4, Mips::XOR);
887 case Mips::ATOMIC_LOAD_XOR_I64:
888 return emitAtomicBinary(MI, BB, 8, Mips::XOR64);
890 case Mips::ATOMIC_LOAD_NAND_I8:
891 return emitAtomicBinaryPartword(MI, BB, 1, 0, true);
892 case Mips::ATOMIC_LOAD_NAND_I16:
893 return emitAtomicBinaryPartword(MI, BB, 2, 0, true);
894 case Mips::ATOMIC_LOAD_NAND_I32:
895 return emitAtomicBinary(MI, BB, 4, 0, true);
896 case Mips::ATOMIC_LOAD_NAND_I64:
897 return emitAtomicBinary(MI, BB, 8, 0, true);
899 case Mips::ATOMIC_LOAD_SUB_I8:
900 return emitAtomicBinaryPartword(MI, BB, 1, Mips::SUBu);
901 case Mips::ATOMIC_LOAD_SUB_I16:
902 return emitAtomicBinaryPartword(MI, BB, 2, Mips::SUBu);
903 case Mips::ATOMIC_LOAD_SUB_I32:
904 return emitAtomicBinary(MI, BB, 4, Mips::SUBu);
905 case Mips::ATOMIC_LOAD_SUB_I64:
906 return emitAtomicBinary(MI, BB, 8, Mips::DSUBu);
908 case Mips::ATOMIC_SWAP_I8:
909 return emitAtomicBinaryPartword(MI, BB, 1, 0);
910 case Mips::ATOMIC_SWAP_I16:
911 return emitAtomicBinaryPartword(MI, BB, 2, 0);
912 case Mips::ATOMIC_SWAP_I32:
913 return emitAtomicBinary(MI, BB, 4, 0);
914 case Mips::ATOMIC_SWAP_I64:
915 return emitAtomicBinary(MI, BB, 8, 0);
917 case Mips::ATOMIC_CMP_SWAP_I8:
918 return emitAtomicCmpSwapPartword(MI, BB, 1);
919 case Mips::ATOMIC_CMP_SWAP_I16:
920 return emitAtomicCmpSwapPartword(MI, BB, 2);
921 case Mips::ATOMIC_CMP_SWAP_I32:
922 return emitAtomicCmpSwap(MI, BB, 4);
923 case Mips::ATOMIC_CMP_SWAP_I64:
924 return emitAtomicCmpSwap(MI, BB, 8);
925 case Mips::PseudoSDIV:
926 case Mips::PseudoUDIV:
931 return insertDivByZeroTrap(MI, *BB, *getTargetMachine().getInstrInfo(),
933 case Mips::PseudoDSDIV:
934 case Mips::PseudoDUDIV:
939 return insertDivByZeroTrap(MI, *BB, *getTargetMachine().getInstrInfo(),
942 return emitSEL_D(MI, BB);
946 // This function also handles Mips::ATOMIC_SWAP_I32 (when BinOpcode == 0), and
947 // Mips::ATOMIC_LOAD_NAND_I32 (when Nand == true)
949 MipsTargetLowering::emitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
950 unsigned Size, unsigned BinOpcode,
952 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicBinary.");
954 MachineFunction *MF = BB->getParent();
955 MachineRegisterInfo &RegInfo = MF->getRegInfo();
956 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
957 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
958 DebugLoc DL = MI->getDebugLoc();
959 unsigned LL, SC, AND, NOR, ZERO, BEQ;
966 LL = Subtarget->hasMips32r6() ? Mips::LL : Mips::LL_R6;
967 SC = Subtarget->hasMips32r6() ? Mips::SC : Mips::SC_R6;
974 LL = Subtarget->hasMips64r6() ? Mips::LLD : Mips::LLD_R6;
975 SC = Subtarget->hasMips64r6() ? Mips::SCD : Mips::SCD_R6;
978 ZERO = Mips::ZERO_64;
982 unsigned OldVal = MI->getOperand(0).getReg();
983 unsigned Ptr = MI->getOperand(1).getReg();
984 unsigned Incr = MI->getOperand(2).getReg();
986 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
987 unsigned AndRes = RegInfo.createVirtualRegister(RC);
988 unsigned Success = RegInfo.createVirtualRegister(RC);
990 // insert new blocks after the current block
991 const BasicBlock *LLVM_BB = BB->getBasicBlock();
992 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
993 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
994 MachineFunction::iterator It = BB;
996 MF->insert(It, loopMBB);
997 MF->insert(It, exitMBB);
999 // Transfer the remainder of BB and its successor edges to exitMBB.
1000 exitMBB->splice(exitMBB->begin(), BB,
1001 std::next(MachineBasicBlock::iterator(MI)), BB->end());
1002 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1006 // fallthrough --> loopMBB
1007 BB->addSuccessor(loopMBB);
1008 loopMBB->addSuccessor(loopMBB);
1009 loopMBB->addSuccessor(exitMBB);
1012 // ll oldval, 0(ptr)
1013 // <binop> storeval, oldval, incr
1014 // sc success, storeval, 0(ptr)
1015 // beq success, $0, loopMBB
1017 BuildMI(BB, DL, TII->get(LL), OldVal).addReg(Ptr).addImm(0);
1019 // and andres, oldval, incr
1020 // nor storeval, $0, andres
1021 BuildMI(BB, DL, TII->get(AND), AndRes).addReg(OldVal).addReg(Incr);
1022 BuildMI(BB, DL, TII->get(NOR), StoreVal).addReg(ZERO).addReg(AndRes);
1023 } else if (BinOpcode) {
1024 // <binop> storeval, oldval, incr
1025 BuildMI(BB, DL, TII->get(BinOpcode), StoreVal).addReg(OldVal).addReg(Incr);
1029 BuildMI(BB, DL, TII->get(SC), Success).addReg(StoreVal).addReg(Ptr).addImm(0);
1030 BuildMI(BB, DL, TII->get(BEQ)).addReg(Success).addReg(ZERO).addMBB(loopMBB);
1032 MI->eraseFromParent(); // The instruction is gone now.
1037 MachineBasicBlock *MipsTargetLowering::emitSignExtendToI32InReg(
1038 MachineInstr *MI, MachineBasicBlock *BB, unsigned Size, unsigned DstReg,
1039 unsigned SrcReg) const {
1040 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1041 DebugLoc DL = MI->getDebugLoc();
1043 if (Subtarget->hasMips32r2() && Size == 1) {
1044 BuildMI(BB, DL, TII->get(Mips::SEB), DstReg).addReg(SrcReg);
1048 if (Subtarget->hasMips32r2() && Size == 2) {
1049 BuildMI(BB, DL, TII->get(Mips::SEH), DstReg).addReg(SrcReg);
1053 MachineFunction *MF = BB->getParent();
1054 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1055 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1056 unsigned ScrReg = RegInfo.createVirtualRegister(RC);
1059 int64_t ShiftImm = 32 - (Size * 8);
1061 BuildMI(BB, DL, TII->get(Mips::SLL), ScrReg).addReg(SrcReg).addImm(ShiftImm);
1062 BuildMI(BB, DL, TII->get(Mips::SRA), DstReg).addReg(ScrReg).addImm(ShiftImm);
1067 MachineBasicBlock *MipsTargetLowering::emitAtomicBinaryPartword(
1068 MachineInstr *MI, MachineBasicBlock *BB, unsigned Size, unsigned BinOpcode,
1070 assert((Size == 1 || Size == 2) &&
1071 "Unsupported size for EmitAtomicBinaryPartial.");
1073 MachineFunction *MF = BB->getParent();
1074 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1075 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1076 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1077 DebugLoc DL = MI->getDebugLoc();
1079 unsigned Dest = MI->getOperand(0).getReg();
1080 unsigned Ptr = MI->getOperand(1).getReg();
1081 unsigned Incr = MI->getOperand(2).getReg();
1083 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1084 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1085 unsigned Mask = RegInfo.createVirtualRegister(RC);
1086 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1087 unsigned NewVal = RegInfo.createVirtualRegister(RC);
1088 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1089 unsigned Incr2 = RegInfo.createVirtualRegister(RC);
1090 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1091 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1092 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1093 unsigned AndRes = RegInfo.createVirtualRegister(RC);
1094 unsigned BinOpRes = RegInfo.createVirtualRegister(RC);
1095 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1096 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1097 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1098 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1099 unsigned Success = RegInfo.createVirtualRegister(RC);
1101 // insert new blocks after the current block
1102 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1103 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1104 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1105 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1106 MachineFunction::iterator It = BB;
1108 MF->insert(It, loopMBB);
1109 MF->insert(It, sinkMBB);
1110 MF->insert(It, exitMBB);
1112 // Transfer the remainder of BB and its successor edges to exitMBB.
1113 exitMBB->splice(exitMBB->begin(), BB,
1114 std::next(MachineBasicBlock::iterator(MI)), BB->end());
1115 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1117 BB->addSuccessor(loopMBB);
1118 loopMBB->addSuccessor(loopMBB);
1119 loopMBB->addSuccessor(sinkMBB);
1120 sinkMBB->addSuccessor(exitMBB);
1123 // addiu masklsb2,$0,-4 # 0xfffffffc
1124 // and alignedaddr,ptr,masklsb2
1125 // andi ptrlsb2,ptr,3
1126 // sll shiftamt,ptrlsb2,3
1127 // ori maskupper,$0,255 # 0xff
1128 // sll mask,maskupper,shiftamt
1129 // nor mask2,$0,mask
1130 // sll incr2,incr,shiftamt
1132 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1133 BuildMI(BB, DL, TII->get(Mips::ADDiu), MaskLSB2)
1134 .addReg(Mips::ZERO).addImm(-4);
1135 BuildMI(BB, DL, TII->get(Mips::AND), AlignedAddr)
1136 .addReg(Ptr).addReg(MaskLSB2);
1137 BuildMI(BB, DL, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1138 if (Subtarget->isLittle()) {
1139 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1141 unsigned Off = RegInfo.createVirtualRegister(RC);
1142 BuildMI(BB, DL, TII->get(Mips::XORi), Off)
1143 .addReg(PtrLSB2).addImm((Size == 1) ? 3 : 2);
1144 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(Off).addImm(3);
1146 BuildMI(BB, DL, TII->get(Mips::ORi), MaskUpper)
1147 .addReg(Mips::ZERO).addImm(MaskImm);
1148 BuildMI(BB, DL, TII->get(Mips::SLLV), Mask)
1149 .addReg(MaskUpper).addReg(ShiftAmt);
1150 BuildMI(BB, DL, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1151 BuildMI(BB, DL, TII->get(Mips::SLLV), Incr2).addReg(Incr).addReg(ShiftAmt);
1153 // atomic.load.binop
1155 // ll oldval,0(alignedaddr)
1156 // binop binopres,oldval,incr2
1157 // and newval,binopres,mask
1158 // and maskedoldval0,oldval,mask2
1159 // or storeval,maskedoldval0,newval
1160 // sc success,storeval,0(alignedaddr)
1161 // beq success,$0,loopMBB
1165 // ll oldval,0(alignedaddr)
1166 // and newval,incr2,mask
1167 // and maskedoldval0,oldval,mask2
1168 // or storeval,maskedoldval0,newval
1169 // sc success,storeval,0(alignedaddr)
1170 // beq success,$0,loopMBB
1173 BuildMI(BB, DL, TII->get(Mips::LL), OldVal).addReg(AlignedAddr).addImm(0);
1175 // and andres, oldval, incr2
1176 // nor binopres, $0, andres
1177 // and newval, binopres, mask
1178 BuildMI(BB, DL, TII->get(Mips::AND), AndRes).addReg(OldVal).addReg(Incr2);
1179 BuildMI(BB, DL, TII->get(Mips::NOR), BinOpRes)
1180 .addReg(Mips::ZERO).addReg(AndRes);
1181 BuildMI(BB, DL, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1182 } else if (BinOpcode) {
1183 // <binop> binopres, oldval, incr2
1184 // and newval, binopres, mask
1185 BuildMI(BB, DL, TII->get(BinOpcode), BinOpRes).addReg(OldVal).addReg(Incr2);
1186 BuildMI(BB, DL, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1187 } else { // atomic.swap
1188 // and newval, incr2, mask
1189 BuildMI(BB, DL, TII->get(Mips::AND), NewVal).addReg(Incr2).addReg(Mask);
1192 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal0)
1193 .addReg(OldVal).addReg(Mask2);
1194 BuildMI(BB, DL, TII->get(Mips::OR), StoreVal)
1195 .addReg(MaskedOldVal0).addReg(NewVal);
1196 BuildMI(BB, DL, TII->get(Mips::SC), Success)
1197 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1198 BuildMI(BB, DL, TII->get(Mips::BEQ))
1199 .addReg(Success).addReg(Mips::ZERO).addMBB(loopMBB);
1202 // and maskedoldval1,oldval,mask
1203 // srl srlres,maskedoldval1,shiftamt
1204 // sign_extend dest,srlres
1207 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal1)
1208 .addReg(OldVal).addReg(Mask);
1209 BuildMI(BB, DL, TII->get(Mips::SRLV), SrlRes)
1210 .addReg(MaskedOldVal1).addReg(ShiftAmt);
1211 BB = emitSignExtendToI32InReg(MI, BB, Size, Dest, SrlRes);
1213 MI->eraseFromParent(); // The instruction is gone now.
1218 MachineBasicBlock * MipsTargetLowering::emitAtomicCmpSwap(MachineInstr *MI,
1219 MachineBasicBlock *BB,
1220 unsigned Size) const {
1221 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicCmpSwap.");
1223 MachineFunction *MF = BB->getParent();
1224 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1225 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
1226 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1227 DebugLoc DL = MI->getDebugLoc();
1228 unsigned LL, SC, ZERO, BNE, BEQ;
1231 LL = isMicroMips ? Mips::LL_MM : Mips::LL;
1232 SC = isMicroMips ? Mips::SC_MM : Mips::SC;
1239 ZERO = Mips::ZERO_64;
1244 unsigned Dest = MI->getOperand(0).getReg();
1245 unsigned Ptr = MI->getOperand(1).getReg();
1246 unsigned OldVal = MI->getOperand(2).getReg();
1247 unsigned NewVal = MI->getOperand(3).getReg();
1249 unsigned Success = RegInfo.createVirtualRegister(RC);
1251 // insert new blocks after the current block
1252 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1253 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1254 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1255 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1256 MachineFunction::iterator It = BB;
1258 MF->insert(It, loop1MBB);
1259 MF->insert(It, loop2MBB);
1260 MF->insert(It, exitMBB);
1262 // Transfer the remainder of BB and its successor edges to exitMBB.
1263 exitMBB->splice(exitMBB->begin(), BB,
1264 std::next(MachineBasicBlock::iterator(MI)), BB->end());
1265 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1269 // fallthrough --> loop1MBB
1270 BB->addSuccessor(loop1MBB);
1271 loop1MBB->addSuccessor(exitMBB);
1272 loop1MBB->addSuccessor(loop2MBB);
1273 loop2MBB->addSuccessor(loop1MBB);
1274 loop2MBB->addSuccessor(exitMBB);
1278 // bne dest, oldval, exitMBB
1280 BuildMI(BB, DL, TII->get(LL), Dest).addReg(Ptr).addImm(0);
1281 BuildMI(BB, DL, TII->get(BNE))
1282 .addReg(Dest).addReg(OldVal).addMBB(exitMBB);
1285 // sc success, newval, 0(ptr)
1286 // beq success, $0, loop1MBB
1288 BuildMI(BB, DL, TII->get(SC), Success)
1289 .addReg(NewVal).addReg(Ptr).addImm(0);
1290 BuildMI(BB, DL, TII->get(BEQ))
1291 .addReg(Success).addReg(ZERO).addMBB(loop1MBB);
1293 MI->eraseFromParent(); // The instruction is gone now.
1299 MipsTargetLowering::emitAtomicCmpSwapPartword(MachineInstr *MI,
1300 MachineBasicBlock *BB,
1301 unsigned Size) const {
1302 assert((Size == 1 || Size == 2) &&
1303 "Unsupported size for EmitAtomicCmpSwapPartial.");
1305 MachineFunction *MF = BB->getParent();
1306 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1307 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1308 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1309 DebugLoc DL = MI->getDebugLoc();
1311 unsigned Dest = MI->getOperand(0).getReg();
1312 unsigned Ptr = MI->getOperand(1).getReg();
1313 unsigned CmpVal = MI->getOperand(2).getReg();
1314 unsigned NewVal = MI->getOperand(3).getReg();
1316 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1317 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1318 unsigned Mask = RegInfo.createVirtualRegister(RC);
1319 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1320 unsigned ShiftedCmpVal = RegInfo.createVirtualRegister(RC);
1321 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1322 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1323 unsigned ShiftedNewVal = RegInfo.createVirtualRegister(RC);
1324 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1325 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1326 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1327 unsigned MaskedCmpVal = RegInfo.createVirtualRegister(RC);
1328 unsigned MaskedNewVal = RegInfo.createVirtualRegister(RC);
1329 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1330 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1331 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1332 unsigned Success = RegInfo.createVirtualRegister(RC);
1334 // insert new blocks after the current block
1335 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1336 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1337 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1338 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1339 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1340 MachineFunction::iterator It = BB;
1342 MF->insert(It, loop1MBB);
1343 MF->insert(It, loop2MBB);
1344 MF->insert(It, sinkMBB);
1345 MF->insert(It, exitMBB);
1347 // Transfer the remainder of BB and its successor edges to exitMBB.
1348 exitMBB->splice(exitMBB->begin(), BB,
1349 std::next(MachineBasicBlock::iterator(MI)), BB->end());
1350 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1352 BB->addSuccessor(loop1MBB);
1353 loop1MBB->addSuccessor(sinkMBB);
1354 loop1MBB->addSuccessor(loop2MBB);
1355 loop2MBB->addSuccessor(loop1MBB);
1356 loop2MBB->addSuccessor(sinkMBB);
1357 sinkMBB->addSuccessor(exitMBB);
1359 // FIXME: computation of newval2 can be moved to loop2MBB.
1361 // addiu masklsb2,$0,-4 # 0xfffffffc
1362 // and alignedaddr,ptr,masklsb2
1363 // andi ptrlsb2,ptr,3
1364 // sll shiftamt,ptrlsb2,3
1365 // ori maskupper,$0,255 # 0xff
1366 // sll mask,maskupper,shiftamt
1367 // nor mask2,$0,mask
1368 // andi maskedcmpval,cmpval,255
1369 // sll shiftedcmpval,maskedcmpval,shiftamt
1370 // andi maskednewval,newval,255
1371 // sll shiftednewval,maskednewval,shiftamt
1372 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1373 BuildMI(BB, DL, TII->get(Mips::ADDiu), MaskLSB2)
1374 .addReg(Mips::ZERO).addImm(-4);
1375 BuildMI(BB, DL, TII->get(Mips::AND), AlignedAddr)
1376 .addReg(Ptr).addReg(MaskLSB2);
1377 BuildMI(BB, DL, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1378 if (Subtarget->isLittle()) {
1379 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1381 unsigned Off = RegInfo.createVirtualRegister(RC);
1382 BuildMI(BB, DL, TII->get(Mips::XORi), Off)
1383 .addReg(PtrLSB2).addImm((Size == 1) ? 3 : 2);
1384 BuildMI(BB, DL, TII->get(Mips::SLL), ShiftAmt).addReg(Off).addImm(3);
1386 BuildMI(BB, DL, TII->get(Mips::ORi), MaskUpper)
1387 .addReg(Mips::ZERO).addImm(MaskImm);
1388 BuildMI(BB, DL, TII->get(Mips::SLLV), Mask)
1389 .addReg(MaskUpper).addReg(ShiftAmt);
1390 BuildMI(BB, DL, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1391 BuildMI(BB, DL, TII->get(Mips::ANDi), MaskedCmpVal)
1392 .addReg(CmpVal).addImm(MaskImm);
1393 BuildMI(BB, DL, TII->get(Mips::SLLV), ShiftedCmpVal)
1394 .addReg(MaskedCmpVal).addReg(ShiftAmt);
1395 BuildMI(BB, DL, TII->get(Mips::ANDi), MaskedNewVal)
1396 .addReg(NewVal).addImm(MaskImm);
1397 BuildMI(BB, DL, TII->get(Mips::SLLV), ShiftedNewVal)
1398 .addReg(MaskedNewVal).addReg(ShiftAmt);
1401 // ll oldval,0(alginedaddr)
1402 // and maskedoldval0,oldval,mask
1403 // bne maskedoldval0,shiftedcmpval,sinkMBB
1405 BuildMI(BB, DL, TII->get(Mips::LL), OldVal).addReg(AlignedAddr).addImm(0);
1406 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal0)
1407 .addReg(OldVal).addReg(Mask);
1408 BuildMI(BB, DL, TII->get(Mips::BNE))
1409 .addReg(MaskedOldVal0).addReg(ShiftedCmpVal).addMBB(sinkMBB);
1412 // and maskedoldval1,oldval,mask2
1413 // or storeval,maskedoldval1,shiftednewval
1414 // sc success,storeval,0(alignedaddr)
1415 // beq success,$0,loop1MBB
1417 BuildMI(BB, DL, TII->get(Mips::AND), MaskedOldVal1)
1418 .addReg(OldVal).addReg(Mask2);
1419 BuildMI(BB, DL, TII->get(Mips::OR), StoreVal)
1420 .addReg(MaskedOldVal1).addReg(ShiftedNewVal);
1421 BuildMI(BB, DL, TII->get(Mips::SC), Success)
1422 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1423 BuildMI(BB, DL, TII->get(Mips::BEQ))
1424 .addReg(Success).addReg(Mips::ZERO).addMBB(loop1MBB);
1427 // srl srlres,maskedoldval0,shiftamt
1428 // sign_extend dest,srlres
1431 BuildMI(BB, DL, TII->get(Mips::SRLV), SrlRes)
1432 .addReg(MaskedOldVal0).addReg(ShiftAmt);
1433 BB = emitSignExtendToI32InReg(MI, BB, Size, Dest, SrlRes);
1435 MI->eraseFromParent(); // The instruction is gone now.
1440 MachineBasicBlock *MipsTargetLowering::emitSEL_D(MachineInstr *MI,
1441 MachineBasicBlock *BB) const {
1442 MachineFunction *MF = BB->getParent();
1443 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
1444 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1445 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1446 DebugLoc DL = MI->getDebugLoc();
1447 MachineBasicBlock::iterator II(MI);
1449 unsigned Fc = MI->getOperand(1).getReg();
1450 const auto &FGR64RegClass = TRI->getRegClass(Mips::FGR64RegClassID);
1452 unsigned Fc2 = RegInfo.createVirtualRegister(FGR64RegClass);
1454 BuildMI(*BB, II, DL, TII->get(Mips::SUBREG_TO_REG), Fc2)
1457 .addImm(Mips::sub_lo);
1459 // We don't erase the original instruction, we just replace the condition
1460 // register with the 64-bit super-register.
1461 MI->getOperand(1).setReg(Fc2);
1466 //===----------------------------------------------------------------------===//
1467 // Misc Lower Operation implementation
1468 //===----------------------------------------------------------------------===//
1469 SDValue MipsTargetLowering::lowerBR_JT(SDValue Op, SelectionDAG &DAG) const {
1470 SDValue Chain = Op.getOperand(0);
1471 SDValue Table = Op.getOperand(1);
1472 SDValue Index = Op.getOperand(2);
1474 EVT PTy = getPointerTy();
1475 unsigned EntrySize =
1476 DAG.getMachineFunction().getJumpTableInfo()->getEntrySize(*getDataLayout());
1478 Index = DAG.getNode(ISD::MUL, DL, PTy, Index,
1479 DAG.getConstant(EntrySize, PTy));
1480 SDValue Addr = DAG.getNode(ISD::ADD, DL, PTy, Index, Table);
1482 EVT MemVT = EVT::getIntegerVT(*DAG.getContext(), EntrySize * 8);
1483 Addr = DAG.getExtLoad(ISD::SEXTLOAD, DL, PTy, Chain, Addr,
1484 MachinePointerInfo::getJumpTable(), MemVT, false, false,
1486 Chain = Addr.getValue(1);
1488 if ((getTargetMachine().getRelocationModel() == Reloc::PIC_) ||
1489 Subtarget->isABI_N64()) {
1490 // For PIC, the sequence is:
1491 // BRIND(load(Jumptable + index) + RelocBase)
1492 // RelocBase can be JumpTable, GOT or some sort of global base.
1493 Addr = DAG.getNode(ISD::ADD, DL, PTy, Addr,
1494 getPICJumpTableRelocBase(Table, DAG));
1497 return DAG.getNode(ISD::BRIND, DL, MVT::Other, Chain, Addr);
1500 SDValue MipsTargetLowering::lowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
1501 // The first operand is the chain, the second is the condition, the third is
1502 // the block to branch to if the condition is true.
1503 SDValue Chain = Op.getOperand(0);
1504 SDValue Dest = Op.getOperand(2);
1507 assert(!Subtarget->hasMips32r6() && !Subtarget->hasMips64r6());
1508 SDValue CondRes = createFPCmp(DAG, Op.getOperand(1));
1510 // Return if flag is not set by a floating point comparison.
1511 if (CondRes.getOpcode() != MipsISD::FPCmp)
1514 SDValue CCNode = CondRes.getOperand(2);
1516 (Mips::CondCode)cast<ConstantSDNode>(CCNode)->getZExtValue();
1517 unsigned Opc = invertFPCondCodeUser(CC) ? Mips::BRANCH_F : Mips::BRANCH_T;
1518 SDValue BrCode = DAG.getConstant(Opc, MVT::i32);
1519 SDValue FCC0 = DAG.getRegister(Mips::FCC0, MVT::i32);
1520 return DAG.getNode(MipsISD::FPBrcond, DL, Op.getValueType(), Chain, BrCode,
1521 FCC0, Dest, CondRes);
1524 SDValue MipsTargetLowering::
1525 lowerSELECT(SDValue Op, SelectionDAG &DAG) const
1527 assert(!Subtarget->hasMips32r6() && !Subtarget->hasMips64r6());
1528 SDValue Cond = createFPCmp(DAG, Op.getOperand(0));
1530 // Return if flag is not set by a floating point comparison.
1531 if (Cond.getOpcode() != MipsISD::FPCmp)
1534 return createCMovFP(DAG, Cond, Op.getOperand(1), Op.getOperand(2),
1538 SDValue MipsTargetLowering::
1539 lowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const
1542 EVT Ty = Op.getOperand(0).getValueType();
1543 SDValue Cond = DAG.getNode(ISD::SETCC, DL,
1544 getSetCCResultType(*DAG.getContext(), Ty),
1545 Op.getOperand(0), Op.getOperand(1),
1548 return DAG.getNode(ISD::SELECT, DL, Op.getValueType(), Cond, Op.getOperand(2),
1552 SDValue MipsTargetLowering::lowerSETCC(SDValue Op, SelectionDAG &DAG) const {
1553 assert(!Subtarget->hasMips32r6() && !Subtarget->hasMips64r6());
1554 SDValue Cond = createFPCmp(DAG, Op);
1556 assert(Cond.getOpcode() == MipsISD::FPCmp &&
1557 "Floating point operand expected.");
1559 SDValue True = DAG.getConstant(1, MVT::i32);
1560 SDValue False = DAG.getConstant(0, MVT::i32);
1562 return createCMovFP(DAG, Cond, True, False, SDLoc(Op));
1565 SDValue MipsTargetLowering::lowerGlobalAddress(SDValue Op,
1566 SelectionDAG &DAG) const {
1567 // FIXME there isn't actually debug info here
1569 EVT Ty = Op.getValueType();
1570 GlobalAddressSDNode *N = cast<GlobalAddressSDNode>(Op);
1571 const GlobalValue *GV = N->getGlobal();
1573 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ &&
1574 !Subtarget->isABI_N64()) {
1575 const MipsTargetObjectFile &TLOF =
1576 (const MipsTargetObjectFile&)getObjFileLowering();
1578 // %gp_rel relocation
1579 if (TLOF.IsGlobalInSmallSection(GV, getTargetMachine())) {
1580 SDValue GA = DAG.getTargetGlobalAddress(GV, DL, MVT::i32, 0,
1582 SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, DL,
1583 DAG.getVTList(MVT::i32), GA);
1584 SDValue GPReg = DAG.getRegister(Mips::GP, MVT::i32);
1585 return DAG.getNode(ISD::ADD, DL, MVT::i32, GPReg, GPRelNode);
1588 // %hi/%lo relocation
1589 return getAddrNonPIC(N, Ty, DAG);
1592 if (GV->hasInternalLinkage() || (GV->hasLocalLinkage() && !isa<Function>(GV)))
1593 return getAddrLocal(N, Ty, DAG,
1594 Subtarget->isABI_N32() || Subtarget->isABI_N64());
1597 return getAddrGlobalLargeGOT(N, Ty, DAG, MipsII::MO_GOT_HI16,
1598 MipsII::MO_GOT_LO16, DAG.getEntryNode(),
1599 MachinePointerInfo::getGOT());
1601 return getAddrGlobal(N, Ty, DAG,
1602 (Subtarget->isABI_N32() || Subtarget->isABI_N64())
1603 ? MipsII::MO_GOT_DISP
1605 DAG.getEntryNode(), MachinePointerInfo::getGOT());
1608 SDValue MipsTargetLowering::lowerBlockAddress(SDValue Op,
1609 SelectionDAG &DAG) const {
1610 BlockAddressSDNode *N = cast<BlockAddressSDNode>(Op);
1611 EVT Ty = Op.getValueType();
1613 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ &&
1614 !Subtarget->isABI_N64())
1615 return getAddrNonPIC(N, Ty, DAG);
1617 return getAddrLocal(N, Ty, DAG,
1618 Subtarget->isABI_N32() || Subtarget->isABI_N64());
1621 SDValue MipsTargetLowering::
1622 lowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const
1624 // If the relocation model is PIC, use the General Dynamic TLS Model or
1625 // Local Dynamic TLS model, otherwise use the Initial Exec or
1626 // Local Exec TLS Model.
1628 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
1630 const GlobalValue *GV = GA->getGlobal();
1631 EVT PtrVT = getPointerTy();
1633 TLSModel::Model model = getTargetMachine().getTLSModel(GV);
1635 if (model == TLSModel::GeneralDynamic || model == TLSModel::LocalDynamic) {
1636 // General Dynamic and Local Dynamic TLS Model.
1637 unsigned Flag = (model == TLSModel::LocalDynamic) ? MipsII::MO_TLSLDM
1640 SDValue TGA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, Flag);
1641 SDValue Argument = DAG.getNode(MipsISD::Wrapper, DL, PtrVT,
1642 getGlobalReg(DAG, PtrVT), TGA);
1643 unsigned PtrSize = PtrVT.getSizeInBits();
1644 IntegerType *PtrTy = Type::getIntNTy(*DAG.getContext(), PtrSize);
1646 SDValue TlsGetAddr = DAG.getExternalSymbol("__tls_get_addr", PtrVT);
1650 Entry.Node = Argument;
1652 Args.push_back(Entry);
1654 TargetLowering::CallLoweringInfo CLI(DAG);
1655 CLI.setDebugLoc(DL).setChain(DAG.getEntryNode())
1656 .setCallee(CallingConv::C, PtrTy, TlsGetAddr, std::move(Args), 0);
1657 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
1659 SDValue Ret = CallResult.first;
1661 if (model != TLSModel::LocalDynamic)
1664 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1665 MipsII::MO_DTPREL_HI);
1666 SDValue Hi = DAG.getNode(MipsISD::Hi, DL, PtrVT, TGAHi);
1667 SDValue TGALo = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1668 MipsII::MO_DTPREL_LO);
1669 SDValue Lo = DAG.getNode(MipsISD::Lo, DL, PtrVT, TGALo);
1670 SDValue Add = DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Ret);
1671 return DAG.getNode(ISD::ADD, DL, PtrVT, Add, Lo);
1675 if (model == TLSModel::InitialExec) {
1676 // Initial Exec TLS Model
1677 SDValue TGA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1678 MipsII::MO_GOTTPREL);
1679 TGA = DAG.getNode(MipsISD::Wrapper, DL, PtrVT, getGlobalReg(DAG, PtrVT),
1681 Offset = DAG.getLoad(PtrVT, DL,
1682 DAG.getEntryNode(), TGA, MachinePointerInfo(),
1683 false, false, false, 0);
1685 // Local Exec TLS Model
1686 assert(model == TLSModel::LocalExec);
1687 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1688 MipsII::MO_TPREL_HI);
1689 SDValue TGALo = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
1690 MipsII::MO_TPREL_LO);
1691 SDValue Hi = DAG.getNode(MipsISD::Hi, DL, PtrVT, TGAHi);
1692 SDValue Lo = DAG.getNode(MipsISD::Lo, DL, PtrVT, TGALo);
1693 Offset = DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
1696 SDValue ThreadPointer = DAG.getNode(MipsISD::ThreadPointer, DL, PtrVT);
1697 return DAG.getNode(ISD::ADD, DL, PtrVT, ThreadPointer, Offset);
1700 SDValue MipsTargetLowering::
1701 lowerJumpTable(SDValue Op, SelectionDAG &DAG) const
1703 JumpTableSDNode *N = cast<JumpTableSDNode>(Op);
1704 EVT Ty = Op.getValueType();
1706 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ &&
1707 !Subtarget->isABI_N64())
1708 return getAddrNonPIC(N, Ty, DAG);
1710 return getAddrLocal(N, Ty, DAG,
1711 Subtarget->isABI_N32() || Subtarget->isABI_N64());
1714 SDValue MipsTargetLowering::
1715 lowerConstantPool(SDValue Op, SelectionDAG &DAG) const
1717 // gp_rel relocation
1718 // FIXME: we should reference the constant pool using small data sections,
1719 // but the asm printer currently doesn't support this feature without
1720 // hacking it. This feature should come soon so we can uncomment the
1722 //if (IsInSmallSection(C->getType())) {
1723 // SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, MVT::i32, CP);
1724 // SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
1725 // ResNode = DAG.getNode(ISD::ADD, MVT::i32, GOT, GPRelNode);
1726 ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
1727 EVT Ty = Op.getValueType();
1729 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ &&
1730 !Subtarget->isABI_N64())
1731 return getAddrNonPIC(N, Ty, DAG);
1733 return getAddrLocal(N, Ty, DAG,
1734 Subtarget->isABI_N32() || Subtarget->isABI_N64());
1737 SDValue MipsTargetLowering::lowerVASTART(SDValue Op, SelectionDAG &DAG) const {
1738 MachineFunction &MF = DAG.getMachineFunction();
1739 MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
1742 SDValue FI = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
1745 // vastart just stores the address of the VarArgsFrameIndex slot into the
1746 // memory location argument.
1747 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
1748 return DAG.getStore(Op.getOperand(0), DL, FI, Op.getOperand(1),
1749 MachinePointerInfo(SV), false, false, 0);
1752 static SDValue lowerFCOPYSIGN32(SDValue Op, SelectionDAG &DAG,
1753 bool HasExtractInsert) {
1754 EVT TyX = Op.getOperand(0).getValueType();
1755 EVT TyY = Op.getOperand(1).getValueType();
1756 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1757 SDValue Const31 = DAG.getConstant(31, MVT::i32);
1761 // If operand is of type f64, extract the upper 32-bit. Otherwise, bitcast it
1763 SDValue X = (TyX == MVT::f32) ?
1764 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(0)) :
1765 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
1767 SDValue Y = (TyY == MVT::f32) ?
1768 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(1)) :
1769 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(1),
1772 if (HasExtractInsert) {
1773 // ext E, Y, 31, 1 ; extract bit31 of Y
1774 // ins X, E, 31, 1 ; insert extracted bit at bit31 of X
1775 SDValue E = DAG.getNode(MipsISD::Ext, DL, MVT::i32, Y, Const31, Const1);
1776 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i32, E, Const31, Const1, X);
1779 // srl SrlX, SllX, 1
1781 // sll SllY, SrlX, 31
1782 // or Or, SrlX, SllY
1783 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i32, X, Const1);
1784 SDValue SrlX = DAG.getNode(ISD::SRL, DL, MVT::i32, SllX, Const1);
1785 SDValue SrlY = DAG.getNode(ISD::SRL, DL, MVT::i32, Y, Const31);
1786 SDValue SllY = DAG.getNode(ISD::SHL, DL, MVT::i32, SrlY, Const31);
1787 Res = DAG.getNode(ISD::OR, DL, MVT::i32, SrlX, SllY);
1790 if (TyX == MVT::f32)
1791 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Res);
1793 SDValue LowX = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
1794 Op.getOperand(0), DAG.getConstant(0, MVT::i32));
1795 return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, LowX, Res);
1798 static SDValue lowerFCOPYSIGN64(SDValue Op, SelectionDAG &DAG,
1799 bool HasExtractInsert) {
1800 unsigned WidthX = Op.getOperand(0).getValueSizeInBits();
1801 unsigned WidthY = Op.getOperand(1).getValueSizeInBits();
1802 EVT TyX = MVT::getIntegerVT(WidthX), TyY = MVT::getIntegerVT(WidthY);
1803 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1806 // Bitcast to integer nodes.
1807 SDValue X = DAG.getNode(ISD::BITCAST, DL, TyX, Op.getOperand(0));
1808 SDValue Y = DAG.getNode(ISD::BITCAST, DL, TyY, Op.getOperand(1));
1810 if (HasExtractInsert) {
1811 // ext E, Y, width(Y) - 1, 1 ; extract bit width(Y)-1 of Y
1812 // ins X, E, width(X) - 1, 1 ; insert extracted bit at bit width(X)-1 of X
1813 SDValue E = DAG.getNode(MipsISD::Ext, DL, TyY, Y,
1814 DAG.getConstant(WidthY - 1, MVT::i32), Const1);
1816 if (WidthX > WidthY)
1817 E = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, E);
1818 else if (WidthY > WidthX)
1819 E = DAG.getNode(ISD::TRUNCATE, DL, TyX, E);
1821 SDValue I = DAG.getNode(MipsISD::Ins, DL, TyX, E,
1822 DAG.getConstant(WidthX - 1, MVT::i32), Const1, X);
1823 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), I);
1826 // (d)sll SllX, X, 1
1827 // (d)srl SrlX, SllX, 1
1828 // (d)srl SrlY, Y, width(Y)-1
1829 // (d)sll SllY, SrlX, width(Y)-1
1830 // or Or, SrlX, SllY
1831 SDValue SllX = DAG.getNode(ISD::SHL, DL, TyX, X, Const1);
1832 SDValue SrlX = DAG.getNode(ISD::SRL, DL, TyX, SllX, Const1);
1833 SDValue SrlY = DAG.getNode(ISD::SRL, DL, TyY, Y,
1834 DAG.getConstant(WidthY - 1, MVT::i32));
1836 if (WidthX > WidthY)
1837 SrlY = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, SrlY);
1838 else if (WidthY > WidthX)
1839 SrlY = DAG.getNode(ISD::TRUNCATE, DL, TyX, SrlY);
1841 SDValue SllY = DAG.getNode(ISD::SHL, DL, TyX, SrlY,
1842 DAG.getConstant(WidthX - 1, MVT::i32));
1843 SDValue Or = DAG.getNode(ISD::OR, DL, TyX, SrlX, SllY);
1844 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Or);
1848 MipsTargetLowering::lowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
1849 if (Subtarget->isGP64bit())
1850 return lowerFCOPYSIGN64(Op, DAG, Subtarget->hasExtractInsert());
1852 return lowerFCOPYSIGN32(Op, DAG, Subtarget->hasExtractInsert());
1855 SDValue MipsTargetLowering::
1856 lowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
1858 assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
1859 "Frame address can only be determined for current frame.");
1861 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
1862 MFI->setFrameAddressIsTaken(true);
1863 EVT VT = Op.getValueType();
1866 DAG.getCopyFromReg(DAG.getEntryNode(), DL,
1867 Subtarget->isABI_N64() ? Mips::FP_64 : Mips::FP, VT);
1871 SDValue MipsTargetLowering::lowerRETURNADDR(SDValue Op,
1872 SelectionDAG &DAG) const {
1873 if (verifyReturnAddressArgumentIsConstant(Op, DAG))
1877 assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
1878 "Return address can be determined only for current frame.");
1880 MachineFunction &MF = DAG.getMachineFunction();
1881 MachineFrameInfo *MFI = MF.getFrameInfo();
1882 MVT VT = Op.getSimpleValueType();
1883 unsigned RA = Subtarget->isABI_N64() ? Mips::RA_64 : Mips::RA;
1884 MFI->setReturnAddressIsTaken(true);
1886 // Return RA, which contains the return address. Mark it an implicit live-in.
1887 unsigned Reg = MF.addLiveIn(RA, getRegClassFor(VT));
1888 return DAG.getCopyFromReg(DAG.getEntryNode(), SDLoc(Op), Reg, VT);
1891 // An EH_RETURN is the result of lowering llvm.eh.return which in turn is
1892 // generated from __builtin_eh_return (offset, handler)
1893 // The effect of this is to adjust the stack pointer by "offset"
1894 // and then branch to "handler".
1895 SDValue MipsTargetLowering::lowerEH_RETURN(SDValue Op, SelectionDAG &DAG)
1897 MachineFunction &MF = DAG.getMachineFunction();
1898 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
1900 MipsFI->setCallsEhReturn();
1901 SDValue Chain = Op.getOperand(0);
1902 SDValue Offset = Op.getOperand(1);
1903 SDValue Handler = Op.getOperand(2);
1905 EVT Ty = Subtarget->isABI_N64() ? MVT::i64 : MVT::i32;
1907 // Store stack offset in V1, store jump target in V0. Glue CopyToReg and
1908 // EH_RETURN nodes, so that instructions are emitted back-to-back.
1909 unsigned OffsetReg = Subtarget->isABI_N64() ? Mips::V1_64 : Mips::V1;
1910 unsigned AddrReg = Subtarget->isABI_N64() ? Mips::V0_64 : Mips::V0;
1911 Chain = DAG.getCopyToReg(Chain, DL, OffsetReg, Offset, SDValue());
1912 Chain = DAG.getCopyToReg(Chain, DL, AddrReg, Handler, Chain.getValue(1));
1913 return DAG.getNode(MipsISD::EH_RETURN, DL, MVT::Other, Chain,
1914 DAG.getRegister(OffsetReg, Ty),
1915 DAG.getRegister(AddrReg, getPointerTy()),
1919 SDValue MipsTargetLowering::lowerATOMIC_FENCE(SDValue Op,
1920 SelectionDAG &DAG) const {
1921 // FIXME: Need pseudo-fence for 'singlethread' fences
1922 // FIXME: Set SType for weaker fences where supported/appropriate.
1925 return DAG.getNode(MipsISD::Sync, DL, MVT::Other, Op.getOperand(0),
1926 DAG.getConstant(SType, MVT::i32));
1929 SDValue MipsTargetLowering::lowerShiftLeftParts(SDValue Op,
1930 SelectionDAG &DAG) const {
1932 SDValue Lo = Op.getOperand(0), Hi = Op.getOperand(1);
1933 SDValue Shamt = Op.getOperand(2);
1936 // lo = (shl lo, shamt)
1937 // hi = (or (shl hi, shamt) (srl (srl lo, 1), ~shamt))
1940 // hi = (shl lo, shamt[4:0])
1941 SDValue Not = DAG.getNode(ISD::XOR, DL, MVT::i32, Shamt,
1942 DAG.getConstant(-1, MVT::i32));
1943 SDValue ShiftRight1Lo = DAG.getNode(ISD::SRL, DL, MVT::i32, Lo,
1944 DAG.getConstant(1, MVT::i32));
1945 SDValue ShiftRightLo = DAG.getNode(ISD::SRL, DL, MVT::i32, ShiftRight1Lo,
1947 SDValue ShiftLeftHi = DAG.getNode(ISD::SHL, DL, MVT::i32, Hi, Shamt);
1948 SDValue Or = DAG.getNode(ISD::OR, DL, MVT::i32, ShiftLeftHi, ShiftRightLo);
1949 SDValue ShiftLeftLo = DAG.getNode(ISD::SHL, DL, MVT::i32, Lo, Shamt);
1950 SDValue Cond = DAG.getNode(ISD::AND, DL, MVT::i32, Shamt,
1951 DAG.getConstant(0x20, MVT::i32));
1952 Lo = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond,
1953 DAG.getConstant(0, MVT::i32), ShiftLeftLo);
1954 Hi = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond, ShiftLeftLo, Or);
1956 SDValue Ops[2] = {Lo, Hi};
1957 return DAG.getMergeValues(Ops, DL);
1960 SDValue MipsTargetLowering::lowerShiftRightParts(SDValue Op, SelectionDAG &DAG,
1963 SDValue Lo = Op.getOperand(0), Hi = Op.getOperand(1);
1964 SDValue Shamt = Op.getOperand(2);
1967 // lo = (or (shl (shl hi, 1), ~shamt) (srl lo, shamt))
1969 // hi = (sra hi, shamt)
1971 // hi = (srl hi, shamt)
1974 // lo = (sra hi, shamt[4:0])
1975 // hi = (sra hi, 31)
1977 // lo = (srl hi, shamt[4:0])
1979 SDValue Not = DAG.getNode(ISD::XOR, DL, MVT::i32, Shamt,
1980 DAG.getConstant(-1, MVT::i32));
1981 SDValue ShiftLeft1Hi = DAG.getNode(ISD::SHL, DL, MVT::i32, Hi,
1982 DAG.getConstant(1, MVT::i32));
1983 SDValue ShiftLeftHi = DAG.getNode(ISD::SHL, DL, MVT::i32, ShiftLeft1Hi, Not);
1984 SDValue ShiftRightLo = DAG.getNode(ISD::SRL, DL, MVT::i32, Lo, Shamt);
1985 SDValue Or = DAG.getNode(ISD::OR, DL, MVT::i32, ShiftLeftHi, ShiftRightLo);
1986 SDValue ShiftRightHi = DAG.getNode(IsSRA ? ISD::SRA : ISD::SRL, DL, MVT::i32,
1988 SDValue Cond = DAG.getNode(ISD::AND, DL, MVT::i32, Shamt,
1989 DAG.getConstant(0x20, MVT::i32));
1990 SDValue Shift31 = DAG.getNode(ISD::SRA, DL, MVT::i32, Hi,
1991 DAG.getConstant(31, MVT::i32));
1992 Lo = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond, ShiftRightHi, Or);
1993 Hi = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond,
1994 IsSRA ? Shift31 : DAG.getConstant(0, MVT::i32),
1997 SDValue Ops[2] = {Lo, Hi};
1998 return DAG.getMergeValues(Ops, DL);
2001 static SDValue createLoadLR(unsigned Opc, SelectionDAG &DAG, LoadSDNode *LD,
2002 SDValue Chain, SDValue Src, unsigned Offset) {
2003 SDValue Ptr = LD->getBasePtr();
2004 EVT VT = LD->getValueType(0), MemVT = LD->getMemoryVT();
2005 EVT BasePtrVT = Ptr.getValueType();
2007 SDVTList VTList = DAG.getVTList(VT, MVT::Other);
2010 Ptr = DAG.getNode(ISD::ADD, DL, BasePtrVT, Ptr,
2011 DAG.getConstant(Offset, BasePtrVT));
2013 SDValue Ops[] = { Chain, Ptr, Src };
2014 return DAG.getMemIntrinsicNode(Opc, DL, VTList, Ops, MemVT,
2015 LD->getMemOperand());
2018 // Expand an unaligned 32 or 64-bit integer load node.
2019 SDValue MipsTargetLowering::lowerLOAD(SDValue Op, SelectionDAG &DAG) const {
2020 LoadSDNode *LD = cast<LoadSDNode>(Op);
2021 EVT MemVT = LD->getMemoryVT();
2023 if (Subtarget->systemSupportsUnalignedAccess())
2026 // Return if load is aligned or if MemVT is neither i32 nor i64.
2027 if ((LD->getAlignment() >= MemVT.getSizeInBits() / 8) ||
2028 ((MemVT != MVT::i32) && (MemVT != MVT::i64)))
2031 bool IsLittle = Subtarget->isLittle();
2032 EVT VT = Op.getValueType();
2033 ISD::LoadExtType ExtType = LD->getExtensionType();
2034 SDValue Chain = LD->getChain(), Undef = DAG.getUNDEF(VT);
2036 assert((VT == MVT::i32) || (VT == MVT::i64));
2039 // (set dst, (i64 (load baseptr)))
2041 // (set tmp, (ldl (add baseptr, 7), undef))
2042 // (set dst, (ldr baseptr, tmp))
2043 if ((VT == MVT::i64) && (ExtType == ISD::NON_EXTLOAD)) {
2044 SDValue LDL = createLoadLR(MipsISD::LDL, DAG, LD, Chain, Undef,
2046 return createLoadLR(MipsISD::LDR, DAG, LD, LDL.getValue(1), LDL,
2050 SDValue LWL = createLoadLR(MipsISD::LWL, DAG, LD, Chain, Undef,
2052 SDValue LWR = createLoadLR(MipsISD::LWR, DAG, LD, LWL.getValue(1), LWL,
2056 // (set dst, (i32 (load baseptr))) or
2057 // (set dst, (i64 (sextload baseptr))) or
2058 // (set dst, (i64 (extload baseptr)))
2060 // (set tmp, (lwl (add baseptr, 3), undef))
2061 // (set dst, (lwr baseptr, tmp))
2062 if ((VT == MVT::i32) || (ExtType == ISD::SEXTLOAD) ||
2063 (ExtType == ISD::EXTLOAD))
2066 assert((VT == MVT::i64) && (ExtType == ISD::ZEXTLOAD));
2069 // (set dst, (i64 (zextload baseptr)))
2071 // (set tmp0, (lwl (add baseptr, 3), undef))
2072 // (set tmp1, (lwr baseptr, tmp0))
2073 // (set tmp2, (shl tmp1, 32))
2074 // (set dst, (srl tmp2, 32))
2076 SDValue Const32 = DAG.getConstant(32, MVT::i32);
2077 SDValue SLL = DAG.getNode(ISD::SHL, DL, MVT::i64, LWR, Const32);
2078 SDValue SRL = DAG.getNode(ISD::SRL, DL, MVT::i64, SLL, Const32);
2079 SDValue Ops[] = { SRL, LWR.getValue(1) };
2080 return DAG.getMergeValues(Ops, DL);
2083 static SDValue createStoreLR(unsigned Opc, SelectionDAG &DAG, StoreSDNode *SD,
2084 SDValue Chain, unsigned Offset) {
2085 SDValue Ptr = SD->getBasePtr(), Value = SD->getValue();
2086 EVT MemVT = SD->getMemoryVT(), BasePtrVT = Ptr.getValueType();
2088 SDVTList VTList = DAG.getVTList(MVT::Other);
2091 Ptr = DAG.getNode(ISD::ADD, DL, BasePtrVT, Ptr,
2092 DAG.getConstant(Offset, BasePtrVT));
2094 SDValue Ops[] = { Chain, Value, Ptr };
2095 return DAG.getMemIntrinsicNode(Opc, DL, VTList, Ops, MemVT,
2096 SD->getMemOperand());
2099 // Expand an unaligned 32 or 64-bit integer store node.
2100 static SDValue lowerUnalignedIntStore(StoreSDNode *SD, SelectionDAG &DAG,
2102 SDValue Value = SD->getValue(), Chain = SD->getChain();
2103 EVT VT = Value.getValueType();
2106 // (store val, baseptr) or
2107 // (truncstore val, baseptr)
2109 // (swl val, (add baseptr, 3))
2110 // (swr val, baseptr)
2111 if ((VT == MVT::i32) || SD->isTruncatingStore()) {
2112 SDValue SWL = createStoreLR(MipsISD::SWL, DAG, SD, Chain,
2114 return createStoreLR(MipsISD::SWR, DAG, SD, SWL, IsLittle ? 0 : 3);
2117 assert(VT == MVT::i64);
2120 // (store val, baseptr)
2122 // (sdl val, (add baseptr, 7))
2123 // (sdr val, baseptr)
2124 SDValue SDL = createStoreLR(MipsISD::SDL, DAG, SD, Chain, IsLittle ? 7 : 0);
2125 return createStoreLR(MipsISD::SDR, DAG, SD, SDL, IsLittle ? 0 : 7);
2128 // Lower (store (fp_to_sint $fp) $ptr) to (store (TruncIntFP $fp), $ptr).
2129 static SDValue lowerFP_TO_SINT_STORE(StoreSDNode *SD, SelectionDAG &DAG) {
2130 SDValue Val = SD->getValue();
2132 if (Val.getOpcode() != ISD::FP_TO_SINT)
2135 EVT FPTy = EVT::getFloatingPointVT(Val.getValueSizeInBits());
2136 SDValue Tr = DAG.getNode(MipsISD::TruncIntFP, SDLoc(Val), FPTy,
2139 return DAG.getStore(SD->getChain(), SDLoc(SD), Tr, SD->getBasePtr(),
2140 SD->getPointerInfo(), SD->isVolatile(),
2141 SD->isNonTemporal(), SD->getAlignment());
2144 SDValue MipsTargetLowering::lowerSTORE(SDValue Op, SelectionDAG &DAG) const {
2145 StoreSDNode *SD = cast<StoreSDNode>(Op);
2146 EVT MemVT = SD->getMemoryVT();
2148 // Lower unaligned integer stores.
2149 if (!Subtarget->systemSupportsUnalignedAccess() &&
2150 (SD->getAlignment() < MemVT.getSizeInBits() / 8) &&
2151 ((MemVT == MVT::i32) || (MemVT == MVT::i64)))
2152 return lowerUnalignedIntStore(SD, DAG, Subtarget->isLittle());
2154 return lowerFP_TO_SINT_STORE(SD, DAG);
2157 SDValue MipsTargetLowering::lowerADD(SDValue Op, SelectionDAG &DAG) const {
2158 if (Op->getOperand(0).getOpcode() != ISD::FRAMEADDR
2159 || cast<ConstantSDNode>
2160 (Op->getOperand(0).getOperand(0))->getZExtValue() != 0
2161 || Op->getOperand(1).getOpcode() != ISD::FRAME_TO_ARGS_OFFSET)
2165 // (add (frameaddr 0), (frame_to_args_offset))
2166 // results from lowering llvm.eh.dwarf.cfa intrinsic. Transform it to
2167 // (add FrameObject, 0)
2168 // where FrameObject is a fixed StackObject with offset 0 which points to
2169 // the old stack pointer.
2170 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
2171 EVT ValTy = Op->getValueType(0);
2172 int FI = MFI->CreateFixedObject(Op.getValueSizeInBits() / 8, 0, false);
2173 SDValue InArgsAddr = DAG.getFrameIndex(FI, ValTy);
2174 return DAG.getNode(ISD::ADD, SDLoc(Op), ValTy, InArgsAddr,
2175 DAG.getConstant(0, ValTy));
2178 SDValue MipsTargetLowering::lowerFP_TO_SINT(SDValue Op,
2179 SelectionDAG &DAG) const {
2180 EVT FPTy = EVT::getFloatingPointVT(Op.getValueSizeInBits());
2181 SDValue Trunc = DAG.getNode(MipsISD::TruncIntFP, SDLoc(Op), FPTy,
2183 return DAG.getNode(ISD::BITCAST, SDLoc(Op), Op.getValueType(), Trunc);
2186 //===----------------------------------------------------------------------===//
2187 // Calling Convention Implementation
2188 //===----------------------------------------------------------------------===//
2190 //===----------------------------------------------------------------------===//
2191 // TODO: Implement a generic logic using tblgen that can support this.
2192 // Mips O32 ABI rules:
2194 // i32 - Passed in A0, A1, A2, A3 and stack
2195 // f32 - Only passed in f32 registers if no int reg has been used yet to hold
2196 // an argument. Otherwise, passed in A1, A2, A3 and stack.
2197 // f64 - Only passed in two aliased f32 registers if no int reg has been used
2198 // yet to hold an argument. Otherwise, use A2, A3 and stack. If A1 is
2199 // not used, it must be shadowed. If only A3 is avaiable, shadow it and
2202 // For vararg functions, all arguments are passed in A0, A1, A2, A3 and stack.
2203 //===----------------------------------------------------------------------===//
2205 static bool CC_MipsO32(unsigned ValNo, MVT ValVT, MVT LocVT,
2206 CCValAssign::LocInfo LocInfo, ISD::ArgFlagsTy ArgFlags,
2207 CCState &State, const MCPhysReg *F64Regs) {
2209 static const unsigned IntRegsSize = 4, FloatRegsSize = 2;
2211 static const MCPhysReg IntRegs[] = { Mips::A0, Mips::A1, Mips::A2, Mips::A3 };
2212 static const MCPhysReg F32Regs[] = { Mips::F12, Mips::F14 };
2214 // Do not process byval args here.
2215 if (ArgFlags.isByVal())
2218 // Promote i8 and i16
2219 if (LocVT == MVT::i8 || LocVT == MVT::i16) {
2221 if (ArgFlags.isSExt())
2222 LocInfo = CCValAssign::SExt;
2223 else if (ArgFlags.isZExt())
2224 LocInfo = CCValAssign::ZExt;
2226 LocInfo = CCValAssign::AExt;
2231 // f32 and f64 are allocated in A0, A1, A2, A3 when either of the following
2232 // is true: function is vararg, argument is 3rd or higher, there is previous
2233 // argument which is not f32 or f64.
2234 bool AllocateFloatsInIntReg = State.isVarArg() || ValNo > 1
2235 || State.getFirstUnallocated(F32Regs, FloatRegsSize) != ValNo;
2236 unsigned OrigAlign = ArgFlags.getOrigAlign();
2237 bool isI64 = (ValVT == MVT::i32 && OrigAlign == 8);
2239 if (ValVT == MVT::i32 || (ValVT == MVT::f32 && AllocateFloatsInIntReg)) {
2240 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2241 // If this is the first part of an i64 arg,
2242 // the allocated register must be either A0 or A2.
2243 if (isI64 && (Reg == Mips::A1 || Reg == Mips::A3))
2244 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2246 } else if (ValVT == MVT::f64 && AllocateFloatsInIntReg) {
2247 // Allocate int register and shadow next int register. If first
2248 // available register is Mips::A1 or Mips::A3, shadow it too.
2249 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2250 if (Reg == Mips::A1 || Reg == Mips::A3)
2251 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2252 State.AllocateReg(IntRegs, IntRegsSize);
2254 } else if (ValVT.isFloatingPoint() && !AllocateFloatsInIntReg) {
2255 // we are guaranteed to find an available float register
2256 if (ValVT == MVT::f32) {
2257 Reg = State.AllocateReg(F32Regs, FloatRegsSize);
2258 // Shadow int register
2259 State.AllocateReg(IntRegs, IntRegsSize);
2261 Reg = State.AllocateReg(F64Regs, FloatRegsSize);
2262 // Shadow int registers
2263 unsigned Reg2 = State.AllocateReg(IntRegs, IntRegsSize);
2264 if (Reg2 == Mips::A1 || Reg2 == Mips::A3)
2265 State.AllocateReg(IntRegs, IntRegsSize);
2266 State.AllocateReg(IntRegs, IntRegsSize);
2269 llvm_unreachable("Cannot handle this ValVT.");
2272 unsigned Offset = State.AllocateStack(ValVT.getSizeInBits() >> 3,
2274 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
2276 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
2281 static bool CC_MipsO32_FP32(unsigned ValNo, MVT ValVT,
2282 MVT LocVT, CCValAssign::LocInfo LocInfo,
2283 ISD::ArgFlagsTy ArgFlags, CCState &State) {
2284 static const MCPhysReg F64Regs[] = { Mips::D6, Mips::D7 };
2286 return CC_MipsO32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State, F64Regs);
2289 static bool CC_MipsO32_FP64(unsigned ValNo, MVT ValVT,
2290 MVT LocVT, CCValAssign::LocInfo LocInfo,
2291 ISD::ArgFlagsTy ArgFlags, CCState &State) {
2292 static const MCPhysReg F64Regs[] = { Mips::D12_64, Mips::D14_64 };
2294 return CC_MipsO32(ValNo, ValVT, LocVT, LocInfo, ArgFlags, State, F64Regs);
2297 #include "MipsGenCallingConv.inc"
2299 //===----------------------------------------------------------------------===//
2300 // Call Calling Convention Implementation
2301 //===----------------------------------------------------------------------===//
2303 // Return next O32 integer argument register.
2304 static unsigned getNextIntArgReg(unsigned Reg) {
2305 assert((Reg == Mips::A0) || (Reg == Mips::A2));
2306 return (Reg == Mips::A0) ? Mips::A1 : Mips::A3;
2310 MipsTargetLowering::passArgOnStack(SDValue StackPtr, unsigned Offset,
2311 SDValue Chain, SDValue Arg, SDLoc DL,
2312 bool IsTailCall, SelectionDAG &DAG) const {
2314 SDValue PtrOff = DAG.getNode(ISD::ADD, DL, getPointerTy(), StackPtr,
2315 DAG.getIntPtrConstant(Offset));
2316 return DAG.getStore(Chain, DL, Arg, PtrOff, MachinePointerInfo(), false,
2320 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
2321 int FI = MFI->CreateFixedObject(Arg.getValueSizeInBits() / 8, Offset, false);
2322 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2323 return DAG.getStore(Chain, DL, Arg, FIN, MachinePointerInfo(),
2324 /*isVolatile=*/ true, false, 0);
2327 void MipsTargetLowering::
2328 getOpndList(SmallVectorImpl<SDValue> &Ops,
2329 std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
2330 bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
2331 CallLoweringInfo &CLI, SDValue Callee, SDValue Chain) const {
2332 // Insert node "GP copy globalreg" before call to function.
2334 // R_MIPS_CALL* operators (emitted when non-internal functions are called
2335 // in PIC mode) allow symbols to be resolved via lazy binding.
2336 // The lazy binding stub requires GP to point to the GOT.
2337 if (IsPICCall && !InternalLinkage) {
2338 unsigned GPReg = Subtarget->isABI_N64() ? Mips::GP_64 : Mips::GP;
2339 EVT Ty = Subtarget->isABI_N64() ? MVT::i64 : MVT::i32;
2340 RegsToPass.push_back(std::make_pair(GPReg, getGlobalReg(CLI.DAG, Ty)));
2343 // Build a sequence of copy-to-reg nodes chained together with token
2344 // chain and flag operands which copy the outgoing args into registers.
2345 // The InFlag in necessary since all emitted instructions must be
2349 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2350 Chain = CLI.DAG.getCopyToReg(Chain, CLI.DL, RegsToPass[i].first,
2351 RegsToPass[i].second, InFlag);
2352 InFlag = Chain.getValue(1);
2355 // Add argument registers to the end of the list so that they are
2356 // known live into the call.
2357 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2358 Ops.push_back(CLI.DAG.getRegister(RegsToPass[i].first,
2359 RegsToPass[i].second.getValueType()));
2361 // Add a register mask operand representing the call-preserved registers.
2362 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2363 const uint32_t *Mask = TRI->getCallPreservedMask(CLI.CallConv);
2364 assert(Mask && "Missing call preserved mask for calling convention");
2365 if (Subtarget->inMips16HardFloat()) {
2366 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(CLI.Callee)) {
2367 llvm::StringRef Sym = G->getGlobal()->getName();
2368 Function *F = G->getGlobal()->getParent()->getFunction(Sym);
2369 if (F && F->hasFnAttribute("__Mips16RetHelper")) {
2370 Mask = MipsRegisterInfo::getMips16RetHelperMask();
2374 Ops.push_back(CLI.DAG.getRegisterMask(Mask));
2376 if (InFlag.getNode())
2377 Ops.push_back(InFlag);
2380 /// LowerCall - functions arguments are copied from virtual regs to
2381 /// (physical regs)/(stack frame), CALLSEQ_START and CALLSEQ_END are emitted.
2383 MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
2384 SmallVectorImpl<SDValue> &InVals) const {
2385 SelectionDAG &DAG = CLI.DAG;
2387 SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
2388 SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
2389 SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
2390 SDValue Chain = CLI.Chain;
2391 SDValue Callee = CLI.Callee;
2392 bool &IsTailCall = CLI.IsTailCall;
2393 CallingConv::ID CallConv = CLI.CallConv;
2394 bool IsVarArg = CLI.IsVarArg;
2396 MachineFunction &MF = DAG.getMachineFunction();
2397 MachineFrameInfo *MFI = MF.getFrameInfo();
2398 const TargetFrameLowering *TFL = MF.getTarget().getFrameLowering();
2399 MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
2400 bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
2402 // Analyze operands of the call, assigning locations to each operand.
2403 SmallVector<CCValAssign, 16> ArgLocs;
2404 CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
2405 getTargetMachine(), ArgLocs, *DAG.getContext());
2406 MipsCC::SpecialCallingConvType SpecialCallingConv =
2407 getSpecialCallingConv(Callee);
2408 MipsCC MipsCCInfo(CallConv, Subtarget->isABI_O32(), Subtarget->isFP64bit(),
2409 CCInfo, SpecialCallingConv);
2411 MipsCCInfo.analyzeCallOperands(Outs, IsVarArg,
2412 Subtarget->mipsSEUsesSoftFloat(),
2413 Callee.getNode(), CLI.getArgs());
2415 // Get a count of how many bytes are to be pushed on the stack.
2416 unsigned NextStackOffset = CCInfo.getNextStackOffset();
2418 // Check if it's really possible to do a tail call.
2421 isEligibleForTailCallOptimization(MipsCCInfo, NextStackOffset,
2422 *MF.getInfo<MipsFunctionInfo>());
2424 if (!IsTailCall && CLI.CS && CLI.CS->isMustTailCall())
2425 report_fatal_error("failed to perform tail call elimination on a call "
2426 "site marked musttail");
2431 // Chain is the output chain of the last Load/Store or CopyToReg node.
2432 // ByValChain is the output chain of the last Memcpy node created for copying
2433 // byval arguments to the stack.
2434 unsigned StackAlignment = TFL->getStackAlignment();
2435 NextStackOffset = RoundUpToAlignment(NextStackOffset, StackAlignment);
2436 SDValue NextStackOffsetVal = DAG.getIntPtrConstant(NextStackOffset, true);
2439 Chain = DAG.getCALLSEQ_START(Chain, NextStackOffsetVal, DL);
2441 SDValue StackPtr = DAG.getCopyFromReg(
2442 Chain, DL, Subtarget->isABI_N64() ? Mips::SP_64 : Mips::SP,
2445 // With EABI is it possible to have 16 args on registers.
2446 std::deque< std::pair<unsigned, SDValue> > RegsToPass;
2447 SmallVector<SDValue, 8> MemOpChains;
2448 MipsCC::byval_iterator ByValArg = MipsCCInfo.byval_begin();
2450 // Walk the register/memloc assignments, inserting copies/loads.
2451 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2452 SDValue Arg = OutVals[i];
2453 CCValAssign &VA = ArgLocs[i];
2454 MVT ValVT = VA.getValVT(), LocVT = VA.getLocVT();
2455 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2458 if (Flags.isByVal()) {
2459 assert(Flags.getByValSize() &&
2460 "ByVal args of size 0 should have been ignored by front-end.");
2461 assert(ByValArg != MipsCCInfo.byval_end());
2462 assert(!IsTailCall &&
2463 "Do not tail-call optimize if there is a byval argument.");
2464 passByValArg(Chain, DL, RegsToPass, MemOpChains, StackPtr, MFI, DAG, Arg,
2465 MipsCCInfo, *ByValArg, Flags, Subtarget->isLittle());
2470 // Promote the value if needed.
2471 switch (VA.getLocInfo()) {
2472 default: llvm_unreachable("Unknown loc info!");
2473 case CCValAssign::Full:
2474 if (VA.isRegLoc()) {
2475 if ((ValVT == MVT::f32 && LocVT == MVT::i32) ||
2476 (ValVT == MVT::f64 && LocVT == MVT::i64) ||
2477 (ValVT == MVT::i64 && LocVT == MVT::f64))
2478 Arg = DAG.getNode(ISD::BITCAST, DL, LocVT, Arg);
2479 else if (ValVT == MVT::f64 && LocVT == MVT::i32) {
2480 SDValue Lo = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
2481 Arg, DAG.getConstant(0, MVT::i32));
2482 SDValue Hi = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
2483 Arg, DAG.getConstant(1, MVT::i32));
2484 if (!Subtarget->isLittle())
2486 unsigned LocRegLo = VA.getLocReg();
2487 unsigned LocRegHigh = getNextIntArgReg(LocRegLo);
2488 RegsToPass.push_back(std::make_pair(LocRegLo, Lo));
2489 RegsToPass.push_back(std::make_pair(LocRegHigh, Hi));
2494 case CCValAssign::SExt:
2495 Arg = DAG.getNode(ISD::SIGN_EXTEND, DL, LocVT, Arg);
2497 case CCValAssign::ZExt:
2498 Arg = DAG.getNode(ISD::ZERO_EXTEND, DL, LocVT, Arg);
2500 case CCValAssign::AExt:
2501 Arg = DAG.getNode(ISD::ANY_EXTEND, DL, LocVT, Arg);
2505 // Arguments that can be passed on register must be kept at
2506 // RegsToPass vector
2507 if (VA.isRegLoc()) {
2508 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2512 // Register can't get to this point...
2513 assert(VA.isMemLoc());
2515 // emit ISD::STORE whichs stores the
2516 // parameter value to a stack Location
2517 MemOpChains.push_back(passArgOnStack(StackPtr, VA.getLocMemOffset(),
2518 Chain, Arg, DL, IsTailCall, DAG));
2521 // Transform all store nodes into one single node because all store
2522 // nodes are independent of each other.
2523 if (!MemOpChains.empty())
2524 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOpChains);
2526 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
2527 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
2528 // node so that legalize doesn't hack it.
2530 (Subtarget->isABI_N64() || IsPIC); // true if calls are translated to
2532 bool GlobalOrExternal = false, InternalLinkage = false;
2534 EVT Ty = Callee.getValueType();
2536 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2538 const GlobalValue *Val = G->getGlobal();
2539 InternalLinkage = Val->hasInternalLinkage();
2541 if (InternalLinkage)
2542 Callee = getAddrLocal(G, Ty, DAG,
2543 Subtarget->isABI_N32() || Subtarget->isABI_N64());
2545 Callee = getAddrGlobalLargeGOT(G, Ty, DAG, MipsII::MO_CALL_HI16,
2546 MipsII::MO_CALL_LO16, Chain,
2547 FuncInfo->callPtrInfo(Val));
2549 Callee = getAddrGlobal(G, Ty, DAG, MipsII::MO_GOT_CALL, Chain,
2550 FuncInfo->callPtrInfo(Val));
2552 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), DL, getPointerTy(), 0,
2553 MipsII::MO_NO_FLAG);
2554 GlobalOrExternal = true;
2556 else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2557 const char *Sym = S->getSymbol();
2559 if (!Subtarget->isABI_N64() && !IsPIC) // !N64 && static
2560 Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy(),
2561 MipsII::MO_NO_FLAG);
2563 Callee = getAddrGlobalLargeGOT(S, Ty, DAG, MipsII::MO_CALL_HI16,
2564 MipsII::MO_CALL_LO16, Chain,
2565 FuncInfo->callPtrInfo(Sym));
2567 Callee = getAddrGlobal(S, Ty, DAG, MipsII::MO_GOT_CALL, Chain,
2568 FuncInfo->callPtrInfo(Sym));
2570 GlobalOrExternal = true;
2573 SmallVector<SDValue, 8> Ops(1, Chain);
2574 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2576 getOpndList(Ops, RegsToPass, IsPICCall, GlobalOrExternal, InternalLinkage,
2577 CLI, Callee, Chain);
2580 return DAG.getNode(MipsISD::TailCall, DL, MVT::Other, Ops);
2582 Chain = DAG.getNode(MipsISD::JmpLink, DL, NodeTys, Ops);
2583 SDValue InFlag = Chain.getValue(1);
2585 // Create the CALLSEQ_END node.
2586 Chain = DAG.getCALLSEQ_END(Chain, NextStackOffsetVal,
2587 DAG.getIntPtrConstant(0, true), InFlag, DL);
2588 InFlag = Chain.getValue(1);
2590 // Handle result values, copying them out of physregs into vregs that we
2592 return LowerCallResult(Chain, InFlag, CallConv, IsVarArg,
2593 Ins, DL, DAG, InVals, CLI.Callee.getNode(), CLI.RetTy);
2596 /// LowerCallResult - Lower the result values of a call into the
2597 /// appropriate copies out of appropriate physical registers.
2599 MipsTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
2600 CallingConv::ID CallConv, bool IsVarArg,
2601 const SmallVectorImpl<ISD::InputArg> &Ins,
2602 SDLoc DL, SelectionDAG &DAG,
2603 SmallVectorImpl<SDValue> &InVals,
2604 const SDNode *CallNode,
2605 const Type *RetTy) const {
2606 // Assign locations to each value returned by this call.
2607 SmallVector<CCValAssign, 16> RVLocs;
2608 CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
2609 getTargetMachine(), RVLocs, *DAG.getContext());
2610 MipsCC MipsCCInfo(CallConv, Subtarget->isABI_O32(), Subtarget->isFP64bit(),
2613 MipsCCInfo.analyzeCallResult(Ins, Subtarget->mipsSEUsesSoftFloat(),
2616 // Copy all of the result registers out of their specified physreg.
2617 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2618 SDValue Val = DAG.getCopyFromReg(Chain, DL, RVLocs[i].getLocReg(),
2619 RVLocs[i].getLocVT(), InFlag);
2620 Chain = Val.getValue(1);
2621 InFlag = Val.getValue(2);
2623 if (RVLocs[i].getValVT() != RVLocs[i].getLocVT())
2624 Val = DAG.getNode(ISD::BITCAST, DL, RVLocs[i].getValVT(), Val);
2626 InVals.push_back(Val);
2632 //===----------------------------------------------------------------------===//
2633 // Formal Arguments Calling Convention Implementation
2634 //===----------------------------------------------------------------------===//
2635 /// LowerFormalArguments - transform physical registers into virtual registers
2636 /// and generate load operations for arguments places on the stack.
2638 MipsTargetLowering::LowerFormalArguments(SDValue Chain,
2639 CallingConv::ID CallConv,
2641 const SmallVectorImpl<ISD::InputArg> &Ins,
2642 SDLoc DL, SelectionDAG &DAG,
2643 SmallVectorImpl<SDValue> &InVals)
2645 MachineFunction &MF = DAG.getMachineFunction();
2646 MachineFrameInfo *MFI = MF.getFrameInfo();
2647 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2649 MipsFI->setVarArgsFrameIndex(0);
2651 // Used with vargs to acumulate store chains.
2652 std::vector<SDValue> OutChains;
2654 // Assign locations to all of the incoming arguments.
2655 SmallVector<CCValAssign, 16> ArgLocs;
2656 CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
2657 getTargetMachine(), ArgLocs, *DAG.getContext());
2658 MipsCC MipsCCInfo(CallConv, Subtarget->isABI_O32(), Subtarget->isFP64bit(),
2660 Function::const_arg_iterator FuncArg =
2661 DAG.getMachineFunction().getFunction()->arg_begin();
2662 bool UseSoftFloat = Subtarget->mipsSEUsesSoftFloat();
2664 MipsCCInfo.analyzeFormalArguments(Ins, UseSoftFloat, FuncArg);
2665 MipsFI->setFormalArgInfo(CCInfo.getNextStackOffset(),
2666 MipsCCInfo.hasByValArg());
2668 unsigned CurArgIdx = 0;
2669 MipsCC::byval_iterator ByValArg = MipsCCInfo.byval_begin();
2671 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2672 CCValAssign &VA = ArgLocs[i];
2673 std::advance(FuncArg, Ins[i].OrigArgIndex - CurArgIdx);
2674 CurArgIdx = Ins[i].OrigArgIndex;
2675 EVT ValVT = VA.getValVT();
2676 ISD::ArgFlagsTy Flags = Ins[i].Flags;
2677 bool IsRegLoc = VA.isRegLoc();
2679 if (Flags.isByVal()) {
2680 assert(Flags.getByValSize() &&
2681 "ByVal args of size 0 should have been ignored by front-end.");
2682 assert(ByValArg != MipsCCInfo.byval_end());
2683 copyByValRegs(Chain, DL, OutChains, DAG, Flags, InVals, &*FuncArg,
2684 MipsCCInfo, *ByValArg);
2689 // Arguments stored on registers
2691 MVT RegVT = VA.getLocVT();
2692 unsigned ArgReg = VA.getLocReg();
2693 const TargetRegisterClass *RC = getRegClassFor(RegVT);
2695 // Transform the arguments stored on
2696 // physical registers into virtual ones
2697 unsigned Reg = addLiveIn(DAG.getMachineFunction(), ArgReg, RC);
2698 SDValue ArgValue = DAG.getCopyFromReg(Chain, DL, Reg, RegVT);
2700 // If this is an 8 or 16-bit value, it has been passed promoted
2701 // to 32 bits. Insert an assert[sz]ext to capture this, then
2702 // truncate to the right size.
2703 if (VA.getLocInfo() != CCValAssign::Full) {
2704 unsigned Opcode = 0;
2705 if (VA.getLocInfo() == CCValAssign::SExt)
2706 Opcode = ISD::AssertSext;
2707 else if (VA.getLocInfo() == CCValAssign::ZExt)
2708 Opcode = ISD::AssertZext;
2710 ArgValue = DAG.getNode(Opcode, DL, RegVT, ArgValue,
2711 DAG.getValueType(ValVT));
2712 ArgValue = DAG.getNode(ISD::TRUNCATE, DL, ValVT, ArgValue);
2715 // Handle floating point arguments passed in integer registers and
2716 // long double arguments passed in floating point registers.
2717 if ((RegVT == MVT::i32 && ValVT == MVT::f32) ||
2718 (RegVT == MVT::i64 && ValVT == MVT::f64) ||
2719 (RegVT == MVT::f64 && ValVT == MVT::i64))
2720 ArgValue = DAG.getNode(ISD::BITCAST, DL, ValVT, ArgValue);
2721 else if (Subtarget->isABI_O32() && RegVT == MVT::i32 &&
2722 ValVT == MVT::f64) {
2723 unsigned Reg2 = addLiveIn(DAG.getMachineFunction(),
2724 getNextIntArgReg(ArgReg), RC);
2725 SDValue ArgValue2 = DAG.getCopyFromReg(Chain, DL, Reg2, RegVT);
2726 if (!Subtarget->isLittle())
2727 std::swap(ArgValue, ArgValue2);
2728 ArgValue = DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64,
2729 ArgValue, ArgValue2);
2732 InVals.push_back(ArgValue);
2733 } else { // VA.isRegLoc()
2736 assert(VA.isMemLoc());
2738 // The stack pointer offset is relative to the caller stack frame.
2739 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
2740 VA.getLocMemOffset(), true);
2742 // Create load nodes to retrieve arguments from the stack
2743 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2744 SDValue Load = DAG.getLoad(ValVT, DL, Chain, FIN,
2745 MachinePointerInfo::getFixedStack(FI),
2746 false, false, false, 0);
2747 InVals.push_back(Load);
2748 OutChains.push_back(Load.getValue(1));
2752 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2753 // The mips ABIs for returning structs by value requires that we copy
2754 // the sret argument into $v0 for the return. Save the argument into
2755 // a virtual register so that we can access it from the return points.
2756 if (Ins[i].Flags.isSRet()) {
2757 unsigned Reg = MipsFI->getSRetReturnReg();
2759 Reg = MF.getRegInfo().createVirtualRegister(
2760 getRegClassFor(Subtarget->isABI_N64() ? MVT::i64 : MVT::i32));
2761 MipsFI->setSRetReturnReg(Reg);
2763 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), DL, Reg, InVals[i]);
2764 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Copy, Chain);
2770 writeVarArgRegs(OutChains, MipsCCInfo, Chain, DL, DAG);
2772 // All stores are grouped in one node to allow the matching between
2773 // the size of Ins and InVals. This only happens when on varg functions
2774 if (!OutChains.empty()) {
2775 OutChains.push_back(Chain);
2776 Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, OutChains);
2782 //===----------------------------------------------------------------------===//
2783 // Return Value Calling Convention Implementation
2784 //===----------------------------------------------------------------------===//
2787 MipsTargetLowering::CanLowerReturn(CallingConv::ID CallConv,
2788 MachineFunction &MF, bool IsVarArg,
2789 const SmallVectorImpl<ISD::OutputArg> &Outs,
2790 LLVMContext &Context) const {
2791 SmallVector<CCValAssign, 16> RVLocs;
2792 CCState CCInfo(CallConv, IsVarArg, MF, getTargetMachine(),
2794 return CCInfo.CheckReturn(Outs, RetCC_Mips);
2798 MipsTargetLowering::LowerReturn(SDValue Chain,
2799 CallingConv::ID CallConv, bool IsVarArg,
2800 const SmallVectorImpl<ISD::OutputArg> &Outs,
2801 const SmallVectorImpl<SDValue> &OutVals,
2802 SDLoc DL, SelectionDAG &DAG) const {
2803 // CCValAssign - represent the assignment of
2804 // the return value to a location
2805 SmallVector<CCValAssign, 16> RVLocs;
2806 MachineFunction &MF = DAG.getMachineFunction();
2808 // CCState - Info about the registers and stack slot.
2809 CCState CCInfo(CallConv, IsVarArg, MF, getTargetMachine(), RVLocs,
2811 MipsCC MipsCCInfo(CallConv, Subtarget->isABI_O32(), Subtarget->isFP64bit(),
2814 // Analyze return values.
2815 MipsCCInfo.analyzeReturn(Outs, Subtarget->mipsSEUsesSoftFloat(),
2816 MF.getFunction()->getReturnType());
2819 SmallVector<SDValue, 4> RetOps(1, Chain);
2821 // Copy the result values into the output registers.
2822 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2823 SDValue Val = OutVals[i];
2824 CCValAssign &VA = RVLocs[i];
2825 assert(VA.isRegLoc() && "Can only return in registers!");
2827 if (RVLocs[i].getValVT() != RVLocs[i].getLocVT())
2828 Val = DAG.getNode(ISD::BITCAST, DL, RVLocs[i].getLocVT(), Val);
2830 Chain = DAG.getCopyToReg(Chain, DL, VA.getLocReg(), Val, Flag);
2832 // Guarantee that all emitted copies are stuck together with flags.
2833 Flag = Chain.getValue(1);
2834 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2837 // The mips ABIs for returning structs by value requires that we copy
2838 // the sret argument into $v0 for the return. We saved the argument into
2839 // a virtual register in the entry block, so now we copy the value out
2841 if (MF.getFunction()->hasStructRetAttr()) {
2842 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2843 unsigned Reg = MipsFI->getSRetReturnReg();
2846 llvm_unreachable("sret virtual register not created in the entry block");
2847 SDValue Val = DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy());
2848 unsigned V0 = Subtarget->isABI_N64() ? Mips::V0_64 : Mips::V0;
2850 Chain = DAG.getCopyToReg(Chain, DL, V0, Val, Flag);
2851 Flag = Chain.getValue(1);
2852 RetOps.push_back(DAG.getRegister(V0, getPointerTy()));
2855 RetOps[0] = Chain; // Update chain.
2857 // Add the flag if we have it.
2859 RetOps.push_back(Flag);
2861 // Return on Mips is always a "jr $ra"
2862 return DAG.getNode(MipsISD::Ret, DL, MVT::Other, RetOps);
2865 //===----------------------------------------------------------------------===//
2866 // Mips Inline Assembly Support
2867 //===----------------------------------------------------------------------===//
2869 /// getConstraintType - Given a constraint letter, return the type of
2870 /// constraint it is for this target.
2871 MipsTargetLowering::ConstraintType MipsTargetLowering::
2872 getConstraintType(const std::string &Constraint) const
2874 // Mips specific constraints
2875 // GCC config/mips/constraints.md
2877 // 'd' : An address register. Equivalent to r
2878 // unless generating MIPS16 code.
2879 // 'y' : Equivalent to r; retained for
2880 // backwards compatibility.
2881 // 'c' : A register suitable for use in an indirect
2882 // jump. This will always be $25 for -mabicalls.
2883 // 'l' : The lo register. 1 word storage.
2884 // 'x' : The hilo register pair. Double word storage.
2885 if (Constraint.size() == 1) {
2886 switch (Constraint[0]) {
2894 return C_RegisterClass;
2899 return TargetLowering::getConstraintType(Constraint);
2902 /// Examine constraint type and operand type and determine a weight value.
2903 /// This object must already have been set up with the operand type
2904 /// and the current alternative constraint selected.
2905 TargetLowering::ConstraintWeight
2906 MipsTargetLowering::getSingleConstraintMatchWeight(
2907 AsmOperandInfo &info, const char *constraint) const {
2908 ConstraintWeight weight = CW_Invalid;
2909 Value *CallOperandVal = info.CallOperandVal;
2910 // If we don't have a value, we can't do a match,
2911 // but allow it at the lowest weight.
2912 if (!CallOperandVal)
2914 Type *type = CallOperandVal->getType();
2915 // Look at the constraint type.
2916 switch (*constraint) {
2918 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
2922 if (type->isIntegerTy())
2923 weight = CW_Register;
2925 case 'f': // FPU or MSA register
2926 if (Subtarget->hasMSA() && type->isVectorTy() &&
2927 cast<VectorType>(type)->getBitWidth() == 128)
2928 weight = CW_Register;
2929 else if (type->isFloatTy())
2930 weight = CW_Register;
2932 case 'c': // $25 for indirect jumps
2933 case 'l': // lo register
2934 case 'x': // hilo register pair
2935 if (type->isIntegerTy())
2936 weight = CW_SpecificReg;
2938 case 'I': // signed 16 bit immediate
2939 case 'J': // integer zero
2940 case 'K': // unsigned 16 bit immediate
2941 case 'L': // signed 32 bit immediate where lower 16 bits are 0
2942 case 'N': // immediate in the range of -65535 to -1 (inclusive)
2943 case 'O': // signed 15 bit immediate (+- 16383)
2944 case 'P': // immediate in the range of 65535 to 1 (inclusive)
2945 if (isa<ConstantInt>(CallOperandVal))
2946 weight = CW_Constant;
2955 /// This is a helper function to parse a physical register string and split it
2956 /// into non-numeric and numeric parts (Prefix and Reg). The first boolean flag
2957 /// that is returned indicates whether parsing was successful. The second flag
2958 /// is true if the numeric part exists.
2959 static std::pair<bool, bool>
2960 parsePhysicalReg(const StringRef &C, std::string &Prefix,
2961 unsigned long long &Reg) {
2962 if (C.front() != '{' || C.back() != '}')
2963 return std::make_pair(false, false);
2965 // Search for the first numeric character.
2966 StringRef::const_iterator I, B = C.begin() + 1, E = C.end() - 1;
2967 I = std::find_if(B, E, std::ptr_fun(isdigit));
2969 Prefix.assign(B, I - B);
2971 // The second flag is set to false if no numeric characters were found.
2973 return std::make_pair(true, false);
2975 // Parse the numeric characters.
2976 return std::make_pair(!getAsUnsignedInteger(StringRef(I, E - I), 10, Reg),
2980 std::pair<unsigned, const TargetRegisterClass *> MipsTargetLowering::
2981 parseRegForInlineAsmConstraint(const StringRef &C, MVT VT) const {
2982 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2983 const TargetRegisterClass *RC;
2985 unsigned long long Reg;
2987 std::pair<bool, bool> R = parsePhysicalReg(C, Prefix, Reg);
2990 return std::make_pair(0U, nullptr);
2992 if ((Prefix == "hi" || Prefix == "lo")) { // Parse hi/lo.
2993 // No numeric characters follow "hi" or "lo".
2995 return std::make_pair(0U, nullptr);
2997 RC = TRI->getRegClass(Prefix == "hi" ?
2998 Mips::HI32RegClassID : Mips::LO32RegClassID);
2999 return std::make_pair(*(RC->begin()), RC);
3000 } else if (Prefix.compare(0, 4, "$msa") == 0) {
3001 // Parse $msa(ir|csr|access|save|modify|request|map|unmap)
3003 // No numeric characters follow the name.
3005 return std::make_pair(0U, nullptr);
3007 Reg = StringSwitch<unsigned long long>(Prefix)
3008 .Case("$msair", Mips::MSAIR)
3009 .Case("$msacsr", Mips::MSACSR)
3010 .Case("$msaaccess", Mips::MSAAccess)
3011 .Case("$msasave", Mips::MSASave)
3012 .Case("$msamodify", Mips::MSAModify)
3013 .Case("$msarequest", Mips::MSARequest)
3014 .Case("$msamap", Mips::MSAMap)
3015 .Case("$msaunmap", Mips::MSAUnmap)
3019 return std::make_pair(0U, nullptr);
3021 RC = TRI->getRegClass(Mips::MSACtrlRegClassID);
3022 return std::make_pair(Reg, RC);
3026 return std::make_pair(0U, nullptr);
3028 if (Prefix == "$f") { // Parse $f0-$f31.
3029 // If the size of FP registers is 64-bit or Reg is an even number, select
3030 // the 64-bit register class. Otherwise, select the 32-bit register class.
3031 if (VT == MVT::Other)
3032 VT = (Subtarget->isFP64bit() || !(Reg % 2)) ? MVT::f64 : MVT::f32;
3034 RC = getRegClassFor(VT);
3036 if (RC == &Mips::AFGR64RegClass) {
3037 assert(Reg % 2 == 0);
3040 } else if (Prefix == "$fcc") // Parse $fcc0-$fcc7.
3041 RC = TRI->getRegClass(Mips::FCCRegClassID);
3042 else if (Prefix == "$w") { // Parse $w0-$w31.
3043 RC = getRegClassFor((VT == MVT::Other) ? MVT::v16i8 : VT);
3044 } else { // Parse $0-$31.
3045 assert(Prefix == "$");
3046 RC = getRegClassFor((VT == MVT::Other) ? MVT::i32 : VT);
3049 assert(Reg < RC->getNumRegs());
3050 return std::make_pair(*(RC->begin() + Reg), RC);
3053 /// Given a register class constraint, like 'r', if this corresponds directly
3054 /// to an LLVM register class, return a register of 0 and the register class
3056 std::pair<unsigned, const TargetRegisterClass*> MipsTargetLowering::
3057 getRegForInlineAsmConstraint(const std::string &Constraint, MVT VT) const
3059 if (Constraint.size() == 1) {
3060 switch (Constraint[0]) {
3061 case 'd': // Address register. Same as 'r' unless generating MIPS16 code.
3062 case 'y': // Same as 'r'. Exists for compatibility.
3064 if (VT == MVT::i32 || VT == MVT::i16 || VT == MVT::i8) {
3065 if (Subtarget->inMips16Mode())
3066 return std::make_pair(0U, &Mips::CPU16RegsRegClass);
3067 return std::make_pair(0U, &Mips::GPR32RegClass);
3069 if (VT == MVT::i64 && !Subtarget->isGP64bit())
3070 return std::make_pair(0U, &Mips::GPR32RegClass);
3071 if (VT == MVT::i64 && Subtarget->isGP64bit())
3072 return std::make_pair(0U, &Mips::GPR64RegClass);
3073 // This will generate an error message
3074 return std::make_pair(0U, nullptr);
3075 case 'f': // FPU or MSA register
3076 if (VT == MVT::v16i8)
3077 return std::make_pair(0U, &Mips::MSA128BRegClass);
3078 else if (VT == MVT::v8i16 || VT == MVT::v8f16)
3079 return std::make_pair(0U, &Mips::MSA128HRegClass);
3080 else if (VT == MVT::v4i32 || VT == MVT::v4f32)
3081 return std::make_pair(0U, &Mips::MSA128WRegClass);
3082 else if (VT == MVT::v2i64 || VT == MVT::v2f64)
3083 return std::make_pair(0U, &Mips::MSA128DRegClass);
3084 else if (VT == MVT::f32)
3085 return std::make_pair(0U, &Mips::FGR32RegClass);
3086 else if ((VT == MVT::f64) && (!Subtarget->isSingleFloat())) {
3087 if (Subtarget->isFP64bit())
3088 return std::make_pair(0U, &Mips::FGR64RegClass);
3089 return std::make_pair(0U, &Mips::AFGR64RegClass);
3092 case 'c': // register suitable for indirect jump
3094 return std::make_pair((unsigned)Mips::T9, &Mips::GPR32RegClass);
3095 assert(VT == MVT::i64 && "Unexpected type.");
3096 return std::make_pair((unsigned)Mips::T9_64, &Mips::GPR64RegClass);
3097 case 'l': // register suitable for indirect jump
3099 return std::make_pair((unsigned)Mips::LO0, &Mips::LO32RegClass);
3100 return std::make_pair((unsigned)Mips::LO0_64, &Mips::LO64RegClass);
3101 case 'x': // register suitable for indirect jump
3102 // Fixme: Not triggering the use of both hi and low
3103 // This will generate an error message
3104 return std::make_pair(0U, nullptr);
3108 std::pair<unsigned, const TargetRegisterClass *> R;
3109 R = parseRegForInlineAsmConstraint(Constraint, VT);
3114 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
3117 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
3118 /// vector. If it is invalid, don't add anything to Ops.
3119 void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
3120 std::string &Constraint,
3121 std::vector<SDValue>&Ops,
3122 SelectionDAG &DAG) const {
3125 // Only support length 1 constraints for now.
3126 if (Constraint.length() > 1) return;
3128 char ConstraintLetter = Constraint[0];
3129 switch (ConstraintLetter) {
3130 default: break; // This will fall through to the generic implementation
3131 case 'I': // Signed 16 bit constant
3132 // If this fails, the parent routine will give an error
3133 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3134 EVT Type = Op.getValueType();
3135 int64_t Val = C->getSExtValue();
3136 if (isInt<16>(Val)) {
3137 Result = DAG.getTargetConstant(Val, Type);
3142 case 'J': // integer zero
3143 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3144 EVT Type = Op.getValueType();
3145 int64_t Val = C->getZExtValue();
3147 Result = DAG.getTargetConstant(0, Type);
3152 case 'K': // unsigned 16 bit immediate
3153 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3154 EVT Type = Op.getValueType();
3155 uint64_t Val = (uint64_t)C->getZExtValue();
3156 if (isUInt<16>(Val)) {
3157 Result = DAG.getTargetConstant(Val, Type);
3162 case 'L': // signed 32 bit immediate where lower 16 bits are 0
3163 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3164 EVT Type = Op.getValueType();
3165 int64_t Val = C->getSExtValue();
3166 if ((isInt<32>(Val)) && ((Val & 0xffff) == 0)){
3167 Result = DAG.getTargetConstant(Val, Type);
3172 case 'N': // immediate in the range of -65535 to -1 (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);
3182 case 'O': // signed 15 bit immediate
3183 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3184 EVT Type = Op.getValueType();
3185 int64_t Val = C->getSExtValue();
3186 if ((isInt<15>(Val))) {
3187 Result = DAG.getTargetConstant(Val, Type);
3192 case 'P': // immediate in the range of 1 to 65535 (inclusive)
3193 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3194 EVT Type = Op.getValueType();
3195 int64_t Val = C->getSExtValue();
3196 if ((Val <= 65535) && (Val >= 1)) {
3197 Result = DAG.getTargetConstant(Val, Type);
3204 if (Result.getNode()) {
3205 Ops.push_back(Result);
3209 TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
3212 bool MipsTargetLowering::isLegalAddressingMode(const AddrMode &AM,
3214 // No global is ever allowed as a base.
3219 case 0: // "r+i" or just "i", depending on HasBaseReg.
3222 if (!AM.HasBaseReg) // allow "r+i".
3224 return false; // disallow "r+r" or "r+r+i".
3233 MipsTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
3234 // The Mips target isn't yet aware of offsets.
3238 EVT MipsTargetLowering::getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
3240 bool IsMemset, bool ZeroMemset,
3242 MachineFunction &MF) const {
3243 if (Subtarget->hasMips64())
3249 bool MipsTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3250 if (VT != MVT::f32 && VT != MVT::f64)
3252 if (Imm.isNegZero())
3254 return Imm.isZero();
3257 unsigned MipsTargetLowering::getJumpTableEncoding() const {
3258 if (Subtarget->isABI_N64())
3259 return MachineJumpTableInfo::EK_GPRel64BlockAddress;
3261 return TargetLowering::getJumpTableEncoding();
3264 /// This function returns true if CallSym is a long double emulation routine.
3265 static bool isF128SoftLibCall(const char *CallSym) {
3266 const char *const LibCalls[] =
3267 {"__addtf3", "__divtf3", "__eqtf2", "__extenddftf2", "__extendsftf2",
3268 "__fixtfdi", "__fixtfsi", "__fixtfti", "__fixunstfdi", "__fixunstfsi",
3269 "__fixunstfti", "__floatditf", "__floatsitf", "__floattitf",
3270 "__floatunditf", "__floatunsitf", "__floatuntitf", "__getf2", "__gttf2",
3271 "__letf2", "__lttf2", "__multf3", "__netf2", "__powitf2", "__subtf3",
3272 "__trunctfdf2", "__trunctfsf2", "__unordtf2",
3273 "ceill", "copysignl", "cosl", "exp2l", "expl", "floorl", "fmal", "fmodl",
3274 "log10l", "log2l", "logl", "nearbyintl", "powl", "rintl", "sinl", "sqrtl",
3277 const char *const *End = LibCalls + array_lengthof(LibCalls);
3279 // Check that LibCalls is sorted alphabetically.
3280 MipsTargetLowering::LTStr Comp;
3283 for (const char *const *I = LibCalls; I < End - 1; ++I)
3284 assert(Comp(*I, *(I + 1)));
3287 return std::binary_search(LibCalls, End, CallSym, Comp);
3290 /// This function returns true if Ty is fp128 or i128 which was originally a
3292 static bool originalTypeIsF128(const Type *Ty, const SDNode *CallNode) {
3293 if (Ty->isFP128Ty())
3296 const ExternalSymbolSDNode *ES =
3297 dyn_cast_or_null<const ExternalSymbolSDNode>(CallNode);
3299 // If the Ty is i128 and the function being called is a long double emulation
3300 // routine, then the original type is f128.
3301 return (ES && Ty->isIntegerTy(128) && isF128SoftLibCall(ES->getSymbol()));
3304 MipsTargetLowering::MipsCC::SpecialCallingConvType
3305 MipsTargetLowering::getSpecialCallingConv(SDValue Callee) const {
3306 MipsCC::SpecialCallingConvType SpecialCallingConv =
3307 MipsCC::NoSpecialCallingConv;
3308 if (Subtarget->inMips16HardFloat()) {
3309 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
3310 llvm::StringRef Sym = G->getGlobal()->getName();
3311 Function *F = G->getGlobal()->getParent()->getFunction(Sym);
3312 if (F && F->hasFnAttribute("__Mips16RetHelper")) {
3313 SpecialCallingConv = MipsCC::Mips16RetHelperConv;
3317 return SpecialCallingConv;
3320 MipsTargetLowering::MipsCC::MipsCC(
3321 CallingConv::ID CC, bool IsO32_, bool IsFP64_, CCState &Info,
3322 MipsCC::SpecialCallingConvType SpecialCallingConv_)
3323 : CCInfo(Info), CallConv(CC), IsO32(IsO32_), IsFP64(IsFP64_),
3324 SpecialCallingConv(SpecialCallingConv_){
3325 // Pre-allocate reserved argument area.
3326 CCInfo.AllocateStack(reservedArgArea(), 1);
3330 void MipsTargetLowering::MipsCC::
3331 analyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Args,
3332 bool IsVarArg, bool IsSoftFloat, const SDNode *CallNode,
3333 std::vector<ArgListEntry> &FuncArgs) {
3334 assert((CallConv != CallingConv::Fast || !IsVarArg) &&
3335 "CallingConv::Fast shouldn't be used for vararg functions.");
3337 unsigned NumOpnds = Args.size();
3338 llvm::CCAssignFn *FixedFn = fixedArgFn(), *VarFn = varArgFn();
3340 for (unsigned I = 0; I != NumOpnds; ++I) {
3341 MVT ArgVT = Args[I].VT;
3342 ISD::ArgFlagsTy ArgFlags = Args[I].Flags;
3345 if (ArgFlags.isByVal()) {
3346 handleByValArg(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags);
3350 if (IsVarArg && !Args[I].IsFixed)
3351 R = VarFn(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo);
3353 MVT RegVT = getRegVT(ArgVT, FuncArgs[Args[I].OrigArgIndex].Ty, CallNode,
3355 R = FixedFn(I, ArgVT, RegVT, CCValAssign::Full, ArgFlags, CCInfo);
3360 dbgs() << "Call operand #" << I << " has unhandled type "
3361 << EVT(ArgVT).getEVTString();
3363 llvm_unreachable(nullptr);
3368 void MipsTargetLowering::MipsCC::
3369 analyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Args,
3370 bool IsSoftFloat, Function::const_arg_iterator FuncArg) {
3371 unsigned NumArgs = Args.size();
3372 llvm::CCAssignFn *FixedFn = fixedArgFn();
3373 unsigned CurArgIdx = 0;
3375 for (unsigned I = 0; I != NumArgs; ++I) {
3376 MVT ArgVT = Args[I].VT;
3377 ISD::ArgFlagsTy ArgFlags = Args[I].Flags;
3378 std::advance(FuncArg, Args[I].OrigArgIndex - CurArgIdx);
3379 CurArgIdx = Args[I].OrigArgIndex;
3381 if (ArgFlags.isByVal()) {
3382 handleByValArg(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags);
3386 MVT RegVT = getRegVT(ArgVT, FuncArg->getType(), nullptr, IsSoftFloat);
3388 if (!FixedFn(I, ArgVT, RegVT, CCValAssign::Full, ArgFlags, CCInfo))
3392 dbgs() << "Formal Arg #" << I << " has unhandled type "
3393 << EVT(ArgVT).getEVTString();
3395 llvm_unreachable(nullptr);
3399 template<typename Ty>
3400 void MipsTargetLowering::MipsCC::
3401 analyzeReturn(const SmallVectorImpl<Ty> &RetVals, bool IsSoftFloat,
3402 const SDNode *CallNode, const Type *RetTy) const {
3405 if (IsSoftFloat && originalTypeIsF128(RetTy, CallNode))
3406 Fn = RetCC_F128Soft;
3410 for (unsigned I = 0, E = RetVals.size(); I < E; ++I) {
3411 MVT VT = RetVals[I].VT;
3412 ISD::ArgFlagsTy Flags = RetVals[I].Flags;
3413 MVT RegVT = this->getRegVT(VT, RetTy, CallNode, IsSoftFloat);
3415 if (Fn(I, VT, RegVT, CCValAssign::Full, Flags, this->CCInfo)) {
3417 dbgs() << "Call result #" << I << " has unhandled type "
3418 << EVT(VT).getEVTString() << '\n';
3420 llvm_unreachable(nullptr);
3425 void MipsTargetLowering::MipsCC::
3426 analyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins, bool IsSoftFloat,
3427 const SDNode *CallNode, const Type *RetTy) const {
3428 analyzeReturn(Ins, IsSoftFloat, CallNode, RetTy);
3431 void MipsTargetLowering::MipsCC::
3432 analyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs, bool IsSoftFloat,
3433 const Type *RetTy) const {
3434 analyzeReturn(Outs, IsSoftFloat, nullptr, RetTy);
3437 void MipsTargetLowering::MipsCC::handleByValArg(unsigned ValNo, MVT ValVT,
3439 CCValAssign::LocInfo LocInfo,
3440 ISD::ArgFlagsTy ArgFlags) {
3441 assert(ArgFlags.getByValSize() && "Byval argument's size shouldn't be 0.");
3443 struct ByValArgInfo ByVal;
3444 unsigned RegSize = regSize();
3445 unsigned ByValSize = RoundUpToAlignment(ArgFlags.getByValSize(), RegSize);
3446 unsigned Align = std::min(std::max(ArgFlags.getByValAlign(), RegSize),
3449 if (useRegsForByval())
3450 allocateRegs(ByVal, ByValSize, Align);
3452 // Allocate space on caller's stack.
3453 ByVal.Address = CCInfo.AllocateStack(ByValSize - RegSize * ByVal.NumRegs,
3455 CCInfo.addLoc(CCValAssign::getMem(ValNo, ValVT, ByVal.Address, LocVT,
3457 ByValArgs.push_back(ByVal);
3460 unsigned MipsTargetLowering::MipsCC::numIntArgRegs() const {
3461 return IsO32 ? array_lengthof(O32IntRegs) : array_lengthof(Mips64IntRegs);
3464 unsigned MipsTargetLowering::MipsCC::reservedArgArea() const {
3465 return (IsO32 && (CallConv != CallingConv::Fast)) ? 16 : 0;
3468 const MCPhysReg *MipsTargetLowering::MipsCC::intArgRegs() const {
3469 return IsO32 ? O32IntRegs : Mips64IntRegs;
3472 llvm::CCAssignFn *MipsTargetLowering::MipsCC::fixedArgFn() const {
3473 if (CallConv == CallingConv::Fast)
3474 return CC_Mips_FastCC;
3476 if (SpecialCallingConv == Mips16RetHelperConv)
3477 return CC_Mips16RetHelper;
3478 return IsO32 ? (IsFP64 ? CC_MipsO32_FP64 : CC_MipsO32_FP32) : CC_MipsN;
3481 llvm::CCAssignFn *MipsTargetLowering::MipsCC::varArgFn() const {
3482 return IsO32 ? (IsFP64 ? CC_MipsO32_FP64 : CC_MipsO32_FP32) : CC_MipsN_VarArg;
3485 const MCPhysReg *MipsTargetLowering::MipsCC::shadowRegs() const {
3486 return IsO32 ? O32IntRegs : Mips64DPRegs;
3489 void MipsTargetLowering::MipsCC::allocateRegs(ByValArgInfo &ByVal,
3492 unsigned RegSize = regSize(), NumIntArgRegs = numIntArgRegs();
3493 const MCPhysReg *IntArgRegs = intArgRegs(), *ShadowRegs = shadowRegs();
3494 assert(!(ByValSize % RegSize) && !(Align % RegSize) &&
3495 "Byval argument's size and alignment should be a multiple of"
3498 ByVal.FirstIdx = CCInfo.getFirstUnallocated(IntArgRegs, NumIntArgRegs);
3500 // If Align > RegSize, the first arg register must be even.
3501 if ((Align > RegSize) && (ByVal.FirstIdx % 2)) {
3502 CCInfo.AllocateReg(IntArgRegs[ByVal.FirstIdx], ShadowRegs[ByVal.FirstIdx]);
3506 // Mark the registers allocated.
3507 for (unsigned I = ByVal.FirstIdx; ByValSize && (I < NumIntArgRegs);
3508 ByValSize -= RegSize, ++I, ++ByVal.NumRegs)
3509 CCInfo.AllocateReg(IntArgRegs[I], ShadowRegs[I]);
3512 MVT MipsTargetLowering::MipsCC::getRegVT(MVT VT, const Type *OrigTy,
3513 const SDNode *CallNode,
3514 bool IsSoftFloat) const {
3515 if (IsSoftFloat || IsO32)
3518 // Check if the original type was fp128.
3519 if (originalTypeIsF128(OrigTy, CallNode)) {
3520 assert(VT == MVT::i64);
3527 void MipsTargetLowering::
3528 copyByValRegs(SDValue Chain, SDLoc DL, std::vector<SDValue> &OutChains,
3529 SelectionDAG &DAG, const ISD::ArgFlagsTy &Flags,
3530 SmallVectorImpl<SDValue> &InVals, const Argument *FuncArg,
3531 const MipsCC &CC, const ByValArgInfo &ByVal) const {
3532 MachineFunction &MF = DAG.getMachineFunction();
3533 MachineFrameInfo *MFI = MF.getFrameInfo();
3534 unsigned RegAreaSize = ByVal.NumRegs * CC.regSize();
3535 unsigned FrameObjSize = std::max(Flags.getByValSize(), RegAreaSize);
3539 FrameObjOffset = (int)CC.reservedArgArea() -
3540 (int)((CC.numIntArgRegs() - ByVal.FirstIdx) * CC.regSize());
3542 FrameObjOffset = ByVal.Address;
3544 // Create frame object.
3545 EVT PtrTy = getPointerTy();
3546 int FI = MFI->CreateFixedObject(FrameObjSize, FrameObjOffset, true);
3547 SDValue FIN = DAG.getFrameIndex(FI, PtrTy);
3548 InVals.push_back(FIN);
3553 // Copy arg registers.
3554 MVT RegTy = MVT::getIntegerVT(CC.regSize() * 8);
3555 const TargetRegisterClass *RC = getRegClassFor(RegTy);
3557 for (unsigned I = 0; I < ByVal.NumRegs; ++I) {
3558 unsigned ArgReg = CC.intArgRegs()[ByVal.FirstIdx + I];
3559 unsigned VReg = addLiveIn(MF, ArgReg, RC);
3560 unsigned Offset = I * CC.regSize();
3561 SDValue StorePtr = DAG.getNode(ISD::ADD, DL, PtrTy, FIN,
3562 DAG.getConstant(Offset, PtrTy));
3563 SDValue Store = DAG.getStore(Chain, DL, DAG.getRegister(VReg, RegTy),
3564 StorePtr, MachinePointerInfo(FuncArg, Offset),
3566 OutChains.push_back(Store);
3570 // Copy byVal arg to registers and stack.
3571 void MipsTargetLowering::
3572 passByValArg(SDValue Chain, SDLoc DL,
3573 std::deque< std::pair<unsigned, SDValue> > &RegsToPass,
3574 SmallVectorImpl<SDValue> &MemOpChains, SDValue StackPtr,
3575 MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg,
3576 const MipsCC &CC, const ByValArgInfo &ByVal,
3577 const ISD::ArgFlagsTy &Flags, bool isLittle) const {
3578 unsigned ByValSizeInBytes = Flags.getByValSize();
3579 unsigned OffsetInBytes = 0; // From beginning of struct
3580 unsigned RegSizeInBytes = CC.regSize();
3581 unsigned Alignment = std::min(Flags.getByValAlign(), RegSizeInBytes);
3582 EVT PtrTy = getPointerTy(), RegTy = MVT::getIntegerVT(RegSizeInBytes * 8);
3584 if (ByVal.NumRegs) {
3585 const MCPhysReg *ArgRegs = CC.intArgRegs();
3586 bool LeftoverBytes = (ByVal.NumRegs * RegSizeInBytes > ByValSizeInBytes);
3589 // Copy words to registers.
3590 for (; I < ByVal.NumRegs - LeftoverBytes;
3591 ++I, OffsetInBytes += RegSizeInBytes) {
3592 SDValue LoadPtr = DAG.getNode(ISD::ADD, DL, PtrTy, Arg,
3593 DAG.getConstant(OffsetInBytes, PtrTy));
3594 SDValue LoadVal = DAG.getLoad(RegTy, DL, Chain, LoadPtr,
3595 MachinePointerInfo(), false, false, false,
3597 MemOpChains.push_back(LoadVal.getValue(1));
3598 unsigned ArgReg = ArgRegs[ByVal.FirstIdx + I];
3599 RegsToPass.push_back(std::make_pair(ArgReg, LoadVal));
3602 // Return if the struct has been fully copied.
3603 if (ByValSizeInBytes == OffsetInBytes)
3606 // Copy the remainder of the byval argument with sub-word loads and shifts.
3607 if (LeftoverBytes) {
3608 assert((ByValSizeInBytes > OffsetInBytes) &&
3609 (ByValSizeInBytes < OffsetInBytes + RegSizeInBytes) &&
3610 "Size of the remainder should be smaller than RegSizeInBytes.");
3613 for (unsigned LoadSizeInBytes = RegSizeInBytes / 2, TotalBytesLoaded = 0;
3614 OffsetInBytes < ByValSizeInBytes; LoadSizeInBytes /= 2) {
3615 unsigned RemainingSizeInBytes = ByValSizeInBytes - OffsetInBytes;
3617 if (RemainingSizeInBytes < LoadSizeInBytes)
3621 SDValue LoadPtr = DAG.getNode(ISD::ADD, DL, PtrTy, Arg,
3622 DAG.getConstant(OffsetInBytes, PtrTy));
3623 SDValue LoadVal = DAG.getExtLoad(
3624 ISD::ZEXTLOAD, DL, RegTy, Chain, LoadPtr, MachinePointerInfo(),
3625 MVT::getIntegerVT(LoadSizeInBytes * 8), false, false, Alignment);
3626 MemOpChains.push_back(LoadVal.getValue(1));
3628 // Shift the loaded value.
3632 Shamt = TotalBytesLoaded * 8;
3634 Shamt = (RegSizeInBytes - (TotalBytesLoaded + LoadSizeInBytes)) * 8;
3636 SDValue Shift = DAG.getNode(ISD::SHL, DL, RegTy, LoadVal,
3637 DAG.getConstant(Shamt, MVT::i32));
3640 Val = DAG.getNode(ISD::OR, DL, RegTy, Val, Shift);
3644 OffsetInBytes += LoadSizeInBytes;
3645 TotalBytesLoaded += LoadSizeInBytes;
3646 Alignment = std::min(Alignment, LoadSizeInBytes);
3649 unsigned ArgReg = ArgRegs[ByVal.FirstIdx + I];
3650 RegsToPass.push_back(std::make_pair(ArgReg, Val));
3655 // Copy remainder of byval arg to it with memcpy.
3656 unsigned MemCpySize = ByValSizeInBytes - OffsetInBytes;
3657 SDValue Src = DAG.getNode(ISD::ADD, DL, PtrTy, Arg,
3658 DAG.getConstant(OffsetInBytes, PtrTy));
3659 SDValue Dst = DAG.getNode(ISD::ADD, DL, PtrTy, StackPtr,
3660 DAG.getIntPtrConstant(ByVal.Address));
3661 Chain = DAG.getMemcpy(Chain, DL, Dst, Src, DAG.getConstant(MemCpySize, PtrTy),
3662 Alignment, /*isVolatile=*/false, /*AlwaysInline=*/false,
3663 MachinePointerInfo(), MachinePointerInfo());
3664 MemOpChains.push_back(Chain);
3667 void MipsTargetLowering::writeVarArgRegs(std::vector<SDValue> &OutChains,
3668 const MipsCC &CC, SDValue Chain,
3669 SDLoc DL, SelectionDAG &DAG) const {
3670 unsigned NumRegs = CC.numIntArgRegs();
3671 const MCPhysReg *ArgRegs = CC.intArgRegs();
3672 const CCState &CCInfo = CC.getCCInfo();
3673 unsigned Idx = CCInfo.getFirstUnallocated(ArgRegs, NumRegs);
3674 unsigned RegSize = CC.regSize();
3675 MVT RegTy = MVT::getIntegerVT(RegSize * 8);
3676 const TargetRegisterClass *RC = getRegClassFor(RegTy);
3677 MachineFunction &MF = DAG.getMachineFunction();
3678 MachineFrameInfo *MFI = MF.getFrameInfo();
3679 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
3681 // Offset of the first variable argument from stack pointer.
3685 VaArgOffset = RoundUpToAlignment(CCInfo.getNextStackOffset(), RegSize);
3687 VaArgOffset = (int)CC.reservedArgArea() - (int)(RegSize * (NumRegs - Idx));
3689 // Record the frame index of the first variable argument
3690 // which is a value necessary to VASTART.
3691 int FI = MFI->CreateFixedObject(RegSize, VaArgOffset, true);
3692 MipsFI->setVarArgsFrameIndex(FI);
3694 // Copy the integer registers that have not been used for argument passing
3695 // to the argument register save area. For O32, the save area is allocated
3696 // in the caller's stack frame, while for N32/64, it is allocated in the
3697 // callee's stack frame.
3698 for (unsigned I = Idx; I < NumRegs; ++I, VaArgOffset += RegSize) {
3699 unsigned Reg = addLiveIn(MF, ArgRegs[I], RC);
3700 SDValue ArgValue = DAG.getCopyFromReg(Chain, DL, Reg, RegTy);
3701 FI = MFI->CreateFixedObject(RegSize, VaArgOffset, true);
3702 SDValue PtrOff = DAG.getFrameIndex(FI, getPointerTy());
3703 SDValue Store = DAG.getStore(Chain, DL, ArgValue, PtrOff,
3704 MachinePointerInfo(), false, false, 0);
3705 cast<StoreSDNode>(Store.getNode())->getMemOperand()->setValue((Value*)nullptr);
3706 OutChains.push_back(Store);