1 //===-- HexagonISelLowering.h - Hexagon DAG Lowering Interface --*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file defines the interfaces that Hexagon uses to lower LLVM code into a 10 // selection DAG. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_HEXAGON_HEXAGONISELLOWERING_H 15 #define LLVM_LIB_TARGET_HEXAGON_HEXAGONISELLOWERING_H 16 17 #include "Hexagon.h" 18 #include "llvm/ADT/StringRef.h" 19 #include "llvm/CodeGen/ISDOpcodes.h" 20 #include "llvm/CodeGen/SelectionDAGNodes.h" 21 #include "llvm/CodeGen/TargetLowering.h" 22 #include "llvm/CodeGen/ValueTypes.h" 23 #include "llvm/IR/CallingConv.h" 24 #include "llvm/IR/InlineAsm.h" 25 #include "llvm/Support/MachineValueType.h" 26 #include <cstdint> 27 #include <utility> 28 29 namespace llvm { 30 31 namespace HexagonISD { 32 33 enum NodeType : unsigned { 34 OP_BEGIN = ISD::BUILTIN_OP_END, 35 36 CONST32 = OP_BEGIN, 37 CONST32_GP, // For marking data present in GP. 38 ADDC, // Add with carry: (X, Y, Cin) -> (X+Y, Cout). 39 SUBC, // Sub with carry: (X, Y, Cin) -> (X+~Y+Cin, Cout). 40 ALLOCA, 41 42 AT_GOT, // Index in GOT. 43 AT_PCREL, // Offset relative to PC. 44 45 CALL, // Function call. 46 CALLnr, // Function call that does not return. 47 CALLR, 48 49 RET_FLAG, // Return with a flag operand. 50 BARRIER, // Memory barrier. 51 JT, // Jump table. 52 CP, // Constant pool. 53 54 COMBINE, 55 VSPLAT, // Generic splat, selection depends on argument/return 56 // types. 57 VASL, 58 VASR, 59 VLSR, 60 61 TSTBIT, 62 INSERT, 63 EXTRACTU, 64 VEXTRACTW, 65 VINSERTW0, 66 VROR, 67 TC_RETURN, 68 EH_RETURN, 69 DCFETCH, 70 READCYCLE, 71 PTRUE, 72 PFALSE, 73 D2P, // Convert 8-byte value to 8-bit predicate register. [*] 74 P2D, // Convert 8-bit predicate register to 8-byte value. [*] 75 V2Q, // Convert HVX vector to a vector predicate reg. [*] 76 Q2V, // Convert vector predicate to an HVX vector. [*] 77 // [*] The equivalence is defined as "Q <=> (V != 0)", 78 // where the != operation compares bytes. 79 // Note: V != 0 is implemented as V >u 0. 80 QCAT, 81 QTRUE, 82 QFALSE, 83 VZERO, 84 VSPLATW, // HVX splat of a 32-bit word with an arbitrary result type. 85 TYPECAST, // No-op that's used to convert between different legal 86 // types in a register. 87 VALIGN, // Align two vectors (in Op0, Op1) to one that would have 88 // been loaded from address in Op2. 89 VALIGNADDR, // Align vector address: Op0 & -Op1, except when it is 90 // an address in a vector load, then it's a no-op. 91 OP_END 92 }; 93 94 } // end namespace HexagonISD 95 96 class HexagonSubtarget; 97 98 class HexagonTargetLowering : public TargetLowering { 99 int VarArgsFrameOffset; // Frame offset to start of varargs area. 100 const HexagonTargetMachine &HTM; 101 const HexagonSubtarget &Subtarget; 102 103 bool CanReturnSmallStruct(const Function* CalleeFn, unsigned& RetSize) 104 const; 105 106 public: 107 explicit HexagonTargetLowering(const TargetMachine &TM, 108 const HexagonSubtarget &ST); 109 110 bool isHVXVectorType(MVT Ty) const; 111 112 /// IsEligibleForTailCallOptimization - Check whether the call is eligible 113 /// for tail call optimization. Targets which want to do tail call 114 /// optimization should implement this function. 115 bool IsEligibleForTailCallOptimization(SDValue Callee, 116 CallingConv::ID CalleeCC, bool isVarArg, bool isCalleeStructRet, 117 bool isCallerStructRet, const SmallVectorImpl<ISD::OutputArg> &Outs, 118 const SmallVectorImpl<SDValue> &OutVals, 119 const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG& DAG) const; 120 121 bool getTgtMemIntrinsic(IntrinsicInfo &Info, const CallInst &I, 122 MachineFunction &MF, 123 unsigned Intrinsic) const override; 124 125 bool isTruncateFree(Type *Ty1, Type *Ty2) const override; 126 bool isTruncateFree(EVT VT1, EVT VT2) const override; 127 128 bool isCheapToSpeculateCttz() const override { return true; } 129 bool isCheapToSpeculateCtlz() const override { return true; } 130 bool isCtlzFast() const override { return true; } 131 132 bool hasBitTest(SDValue X, SDValue Y) const override; 133 134 bool allowTruncateForTailCall(Type *Ty1, Type *Ty2) const override; 135 136 /// Return true if an FMA operation is faster than a pair of mul and add 137 /// instructions. fmuladd intrinsics will be expanded to FMAs when this 138 /// method returns true (and FMAs are legal), otherwise fmuladd is 139 /// expanded to mul + add. 140 bool isFMAFasterThanFMulAndFAdd(const MachineFunction &, 141 EVT) const override; 142 143 // Should we expand the build vector with shuffles? 144 bool shouldExpandBuildVectorWithShuffles(EVT VT, 145 unsigned DefinedValues) const override; 146 147 bool isShuffleMaskLegal(ArrayRef<int> Mask, EVT VT) const override; 148 TargetLoweringBase::LegalizeTypeAction getPreferredVectorAction(MVT VT) 149 const override; 150 151 SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override; 152 void LowerOperationWrapper(SDNode *N, SmallVectorImpl<SDValue> &Results, 153 SelectionDAG &DAG) const override; 154 void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results, 155 SelectionDAG &DAG) const override; 156 157 const char *getTargetNodeName(unsigned Opcode) const override; 158 159 SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const; 160 SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const; 161 SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const; 162 SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const; 163 SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const; 164 SDValue LowerINSERT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const; 165 SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const; 166 SDValue LowerVECTOR_SHIFT(SDValue Op, SelectionDAG &DAG) const; 167 SDValue LowerROTL(SDValue Op, SelectionDAG &DAG) const; 168 SDValue LowerBITCAST(SDValue Op, SelectionDAG &DAG) const; 169 SDValue LowerANY_EXTEND(SDValue Op, SelectionDAG &DAG) const; 170 SDValue LowerSIGN_EXTEND(SDValue Op, SelectionDAG &DAG) const; 171 SDValue LowerZERO_EXTEND(SDValue Op, SelectionDAG &DAG) const; 172 SDValue LowerLoad(SDValue Op, SelectionDAG &DAG) const; 173 SDValue LowerStore(SDValue Op, SelectionDAG &DAG) const; 174 SDValue LowerUnalignedLoad(SDValue Op, SelectionDAG &DAG) const; 175 SDValue LowerUAddSubO(SDValue Op, SelectionDAG &DAG) const; 176 SDValue LowerAddSubCarry(SDValue Op, SelectionDAG &DAG) const; 177 178 SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const; 179 SDValue LowerINLINEASM(SDValue Op, SelectionDAG &DAG) const; 180 SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG) const; 181 SDValue LowerREADCYCLECOUNTER(SDValue Op, SelectionDAG &DAG) const; 182 SDValue LowerEH_LABEL(SDValue Op, SelectionDAG &DAG) const; 183 SDValue LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const; 184 SDValue 185 LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, 186 const SmallVectorImpl<ISD::InputArg> &Ins, 187 const SDLoc &dl, SelectionDAG &DAG, 188 SmallVectorImpl<SDValue> &InVals) const override; 189 SDValue LowerGLOBALADDRESS(SDValue Op, SelectionDAG &DAG) const; 190 SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const; 191 SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; 192 SDValue LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA, 193 SelectionDAG &DAG) const; 194 SDValue LowerToTLSInitialExecModel(GlobalAddressSDNode *GA, 195 SelectionDAG &DAG) const; 196 SDValue LowerToTLSLocalExecModel(GlobalAddressSDNode *GA, 197 SelectionDAG &DAG) const; 198 SDValue GetDynamicTLSAddr(SelectionDAG &DAG, SDValue Chain, 199 GlobalAddressSDNode *GA, SDValue InFlag, EVT PtrVT, 200 unsigned ReturnReg, unsigned char OperandFlags) const; 201 SDValue LowerGLOBAL_OFFSET_TABLE(SDValue Op, SelectionDAG &DAG) const; 202 203 SDValue LowerCall(TargetLowering::CallLoweringInfo &CLI, 204 SmallVectorImpl<SDValue> &InVals) const override; 205 SDValue LowerCallResult(SDValue Chain, SDValue InFlag, 206 CallingConv::ID CallConv, bool isVarArg, 207 const SmallVectorImpl<ISD::InputArg> &Ins, 208 const SDLoc &dl, SelectionDAG &DAG, 209 SmallVectorImpl<SDValue> &InVals, 210 const SmallVectorImpl<SDValue> &OutVals, 211 SDValue Callee) const; 212 213 SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG) const; 214 SDValue LowerVSELECT(SDValue Op, SelectionDAG &DAG) const; 215 SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const; 216 SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG& DAG) const; 217 SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const; 218 219 bool CanLowerReturn(CallingConv::ID CallConv, 220 MachineFunction &MF, bool isVarArg, 221 const SmallVectorImpl<ISD::OutputArg> &Outs, 222 LLVMContext &Context) const override; 223 224 SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, 225 const SmallVectorImpl<ISD::OutputArg> &Outs, 226 const SmallVectorImpl<SDValue> &OutVals, 227 const SDLoc &dl, SelectionDAG &DAG) const override; 228 229 SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override; 230 231 bool mayBeEmittedAsTailCall(const CallInst *CI) const override; 232 233 Register getRegisterByName(const char* RegName, LLT VT, 234 const MachineFunction &MF) const override; 235 236 /// If a physical register, this returns the register that receives the 237 /// exception address on entry to an EH pad. 238 Register 239 getExceptionPointerRegister(const Constant *PersonalityFn) const override { 240 return Hexagon::R0; 241 } 242 243 /// If a physical register, this returns the register that receives the 244 /// exception typeid on entry to a landing pad. 245 Register 246 getExceptionSelectorRegister(const Constant *PersonalityFn) const override { 247 return Hexagon::R1; 248 } 249 250 SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const; 251 SDValue LowerVACOPY(SDValue Op, SelectionDAG &DAG) const; 252 SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const; 253 SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG) const; 254 255 EVT getSetCCResultType(const DataLayout &, LLVMContext &C, 256 EVT VT) const override { 257 if (!VT.isVector()) 258 return MVT::i1; 259 else 260 return EVT::getVectorVT(C, MVT::i1, VT.getVectorNumElements()); 261 } 262 263 bool getPostIndexedAddressParts(SDNode *N, SDNode *Op, 264 SDValue &Base, SDValue &Offset, 265 ISD::MemIndexedMode &AM, 266 SelectionDAG &DAG) const override; 267 268 ConstraintType getConstraintType(StringRef Constraint) const override; 269 270 std::pair<unsigned, const TargetRegisterClass *> 271 getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI, 272 StringRef Constraint, MVT VT) const override; 273 274 unsigned 275 getInlineAsmMemConstraint(StringRef ConstraintCode) const override { 276 if (ConstraintCode == "o") 277 return InlineAsm::Constraint_o; 278 return TargetLowering::getInlineAsmMemConstraint(ConstraintCode); 279 } 280 281 // Intrinsics 282 SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const; 283 SDValue LowerINTRINSIC_VOID(SDValue Op, SelectionDAG &DAG) const; 284 /// isLegalAddressingMode - Return true if the addressing mode represented 285 /// by AM is legal for this target, for a load/store of the specified type. 286 /// The type may be VoidTy, in which case only return true if the addressing 287 /// mode is legal for a load/store of any legal type. 288 /// TODO: Handle pre/postinc as well. 289 bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM, 290 Type *Ty, unsigned AS, 291 Instruction *I = nullptr) const override; 292 /// Return true if folding a constant offset with the given GlobalAddress 293 /// is legal. It is frequently not legal in PIC relocation models. 294 bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const override; 295 296 bool isFPImmLegal(const APFloat &Imm, EVT VT, 297 bool ForCodeSize) const override; 298 299 /// isLegalICmpImmediate - Return true if the specified immediate is legal 300 /// icmp immediate, that is the target has icmp instructions which can 301 /// compare a register against the immediate without having to materialize 302 /// the immediate into a register. 303 bool isLegalICmpImmediate(int64_t Imm) const override; 304 305 EVT getOptimalMemOpType(const MemOp &Op, 306 const AttributeList &FuncAttributes) const override; 307 308 bool allowsMemoryAccess(LLVMContext &Context, const DataLayout &DL, EVT VT, 309 unsigned AddrSpace, Align Alignment, 310 MachineMemOperand::Flags Flags, 311 bool *Fast) const override; 312 313 bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AddrSpace, 314 unsigned Alignment, MachineMemOperand::Flags Flags, bool *Fast) 315 const override; 316 317 /// Returns relocation base for the given PIC jumptable. 318 SDValue getPICJumpTableRelocBase(SDValue Table, SelectionDAG &DAG) 319 const override; 320 321 bool shouldReduceLoadWidth(SDNode *Load, ISD::LoadExtType ExtTy, 322 EVT NewVT) const override; 323 324 // Handling of atomic RMW instructions. 325 Value *emitLoadLinked(IRBuilder<> &Builder, Value *Addr, 326 AtomicOrdering Ord) const override; 327 Value *emitStoreConditional(IRBuilder<> &Builder, Value *Val, 328 Value *Addr, AtomicOrdering Ord) const override; 329 AtomicExpansionKind shouldExpandAtomicLoadInIR(LoadInst *LI) const override; 330 bool shouldExpandAtomicStoreInIR(StoreInst *SI) const override; 331 AtomicExpansionKind 332 shouldExpandAtomicCmpXchgInIR(AtomicCmpXchgInst *AI) const override; 333 334 AtomicExpansionKind 335 shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const override { 336 return AtomicExpansionKind::LLSC; 337 } 338 339 private: 340 void initializeHVXLowering(); 341 void validateConstPtrAlignment(SDValue Ptr, const SDLoc &dl, 342 unsigned NeedAlign) const; 343 344 std::pair<SDValue,int> getBaseAndOffset(SDValue Addr) const; 345 346 bool getBuildVectorConstInts(ArrayRef<SDValue> Values, MVT VecTy, 347 SelectionDAG &DAG, 348 MutableArrayRef<ConstantInt*> Consts) const; 349 SDValue buildVector32(ArrayRef<SDValue> Elem, const SDLoc &dl, MVT VecTy, 350 SelectionDAG &DAG) const; 351 SDValue buildVector64(ArrayRef<SDValue> Elem, const SDLoc &dl, MVT VecTy, 352 SelectionDAG &DAG) const; 353 SDValue extractVector(SDValue VecV, SDValue IdxV, const SDLoc &dl, 354 MVT ValTy, MVT ResTy, SelectionDAG &DAG) const; 355 SDValue insertVector(SDValue VecV, SDValue ValV, SDValue IdxV, 356 const SDLoc &dl, MVT ValTy, SelectionDAG &DAG) const; 357 SDValue expandPredicate(SDValue Vec32, const SDLoc &dl, 358 SelectionDAG &DAG) const; 359 SDValue contractPredicate(SDValue Vec64, const SDLoc &dl, 360 SelectionDAG &DAG) const; 361 SDValue getVectorShiftByInt(SDValue Op, SelectionDAG &DAG) const; 362 363 bool isUndef(SDValue Op) const { 364 if (Op.isMachineOpcode()) 365 return Op.getMachineOpcode() == TargetOpcode::IMPLICIT_DEF; 366 return Op.getOpcode() == ISD::UNDEF; 367 } 368 SDValue getInstr(unsigned MachineOpc, const SDLoc &dl, MVT Ty, 369 ArrayRef<SDValue> Ops, SelectionDAG &DAG) const { 370 SDNode *N = DAG.getMachineNode(MachineOpc, dl, Ty, Ops); 371 return SDValue(N, 0); 372 } 373 SDValue getZero(const SDLoc &dl, MVT Ty, SelectionDAG &DAG) const; 374 375 using VectorPair = std::pair<SDValue, SDValue>; 376 using TypePair = std::pair<MVT, MVT>; 377 378 SDValue getInt(unsigned IntId, MVT ResTy, ArrayRef<SDValue> Ops, 379 const SDLoc &dl, SelectionDAG &DAG) const; 380 381 MVT ty(SDValue Op) const { 382 return Op.getValueType().getSimpleVT(); 383 } 384 TypePair ty(const VectorPair &Ops) const { 385 return { Ops.first.getValueType().getSimpleVT(), 386 Ops.second.getValueType().getSimpleVT() }; 387 } 388 MVT tyScalar(MVT Ty) const { 389 if (!Ty.isVector()) 390 return Ty; 391 return MVT::getIntegerVT(Ty.getSizeInBits()); 392 } 393 MVT tyVector(MVT Ty, MVT ElemTy) const { 394 if (Ty.isVector() && Ty.getVectorElementType() == ElemTy) 395 return Ty; 396 unsigned TyWidth = Ty.getSizeInBits(); 397 unsigned ElemWidth = ElemTy.getSizeInBits(); 398 assert((TyWidth % ElemWidth) == 0); 399 return MVT::getVectorVT(ElemTy, TyWidth/ElemWidth); 400 } 401 402 MVT typeJoin(const TypePair &Tys) const; 403 TypePair typeSplit(MVT Ty) const; 404 MVT typeExtElem(MVT VecTy, unsigned Factor) const; 405 MVT typeTruncElem(MVT VecTy, unsigned Factor) const; 406 407 SDValue opJoin(const VectorPair &Ops, const SDLoc &dl, 408 SelectionDAG &DAG) const; 409 VectorPair opSplit(SDValue Vec, const SDLoc &dl, SelectionDAG &DAG) const; 410 SDValue opCastElem(SDValue Vec, MVT ElemTy, SelectionDAG &DAG) const; 411 412 bool allowsHvxMemoryAccess(MVT VecTy, MachineMemOperand::Flags Flags, 413 bool *Fast) const; 414 bool allowsHvxMisalignedMemoryAccesses(MVT VecTy, 415 MachineMemOperand::Flags Flags, 416 bool *Fast) const; 417 418 bool isHvxSingleTy(MVT Ty) const; 419 bool isHvxPairTy(MVT Ty) const; 420 bool isHvxBoolTy(MVT Ty) const; 421 SDValue convertToByteIndex(SDValue ElemIdx, MVT ElemTy, 422 SelectionDAG &DAG) const; 423 SDValue getIndexInWord32(SDValue Idx, MVT ElemTy, SelectionDAG &DAG) const; 424 SDValue getByteShuffle(const SDLoc &dl, SDValue Op0, SDValue Op1, 425 ArrayRef<int> Mask, SelectionDAG &DAG) const; 426 427 SDValue buildHvxVectorReg(ArrayRef<SDValue> Values, const SDLoc &dl, 428 MVT VecTy, SelectionDAG &DAG) const; 429 SDValue buildHvxVectorPred(ArrayRef<SDValue> Values, const SDLoc &dl, 430 MVT VecTy, SelectionDAG &DAG) const; 431 SDValue createHvxPrefixPred(SDValue PredV, const SDLoc &dl, 432 unsigned BitBytes, bool ZeroFill, 433 SelectionDAG &DAG) const; 434 SDValue extractHvxElementReg(SDValue VecV, SDValue IdxV, const SDLoc &dl, 435 MVT ResTy, SelectionDAG &DAG) const; 436 SDValue extractHvxElementPred(SDValue VecV, SDValue IdxV, const SDLoc &dl, 437 MVT ResTy, SelectionDAG &DAG) const; 438 SDValue insertHvxElementReg(SDValue VecV, SDValue IdxV, SDValue ValV, 439 const SDLoc &dl, SelectionDAG &DAG) const; 440 SDValue insertHvxElementPred(SDValue VecV, SDValue IdxV, SDValue ValV, 441 const SDLoc &dl, SelectionDAG &DAG) const; 442 SDValue extractHvxSubvectorReg(SDValue VecV, SDValue IdxV, const SDLoc &dl, 443 MVT ResTy, SelectionDAG &DAG) const; 444 SDValue extractHvxSubvectorPred(SDValue VecV, SDValue IdxV, const SDLoc &dl, 445 MVT ResTy, SelectionDAG &DAG) const; 446 SDValue insertHvxSubvectorReg(SDValue VecV, SDValue SubV, SDValue IdxV, 447 const SDLoc &dl, SelectionDAG &DAG) const; 448 SDValue insertHvxSubvectorPred(SDValue VecV, SDValue SubV, SDValue IdxV, 449 const SDLoc &dl, SelectionDAG &DAG) const; 450 SDValue extendHvxVectorPred(SDValue VecV, const SDLoc &dl, MVT ResTy, 451 bool ZeroExt, SelectionDAG &DAG) const; 452 SDValue compressHvxPred(SDValue VecQ, const SDLoc &dl, MVT ResTy, 453 SelectionDAG &DAG) const; 454 455 SDValue LowerHvxBuildVector(SDValue Op, SelectionDAG &DAG) const; 456 SDValue LowerHvxConcatVectors(SDValue Op, SelectionDAG &DAG) const; 457 SDValue LowerHvxExtractElement(SDValue Op, SelectionDAG &DAG) const; 458 SDValue LowerHvxInsertElement(SDValue Op, SelectionDAG &DAG) const; 459 SDValue LowerHvxExtractSubvector(SDValue Op, SelectionDAG &DAG) const; 460 SDValue LowerHvxInsertSubvector(SDValue Op, SelectionDAG &DAG) const; 461 SDValue LowerHvxBitcast(SDValue Op, SelectionDAG &DAG) const; 462 SDValue LowerHvxAnyExt(SDValue Op, SelectionDAG &DAG) const; 463 SDValue LowerHvxSignExt(SDValue Op, SelectionDAG &DAG) const; 464 SDValue LowerHvxZeroExt(SDValue Op, SelectionDAG &DAG) const; 465 SDValue LowerHvxCttz(SDValue Op, SelectionDAG &DAG) const; 466 SDValue LowerHvxMul(SDValue Op, SelectionDAG &DAG) const; 467 SDValue LowerHvxMulh(SDValue Op, SelectionDAG &DAG) const; 468 SDValue LowerHvxSetCC(SDValue Op, SelectionDAG &DAG) const; 469 SDValue LowerHvxExtend(SDValue Op, SelectionDAG &DAG) const; 470 SDValue LowerHvxShift(SDValue Op, SelectionDAG &DAG) const; 471 SDValue LowerHvxIntrinsic(SDValue Op, SelectionDAG &DAG) const; 472 SDValue LowerHvxStore(SDValue Op, SelectionDAG &DAG) const; 473 SDValue HvxVecPredBitcastComputation(SDValue Op, SelectionDAG &DAG) const; 474 475 SDValue SplitHvxPairOp(SDValue Op, SelectionDAG &DAG) const; 476 SDValue SplitHvxMemOp(SDValue Op, SelectionDAG &DAG) const; 477 478 std::pair<const TargetRegisterClass*, uint8_t> 479 findRepresentativeClass(const TargetRegisterInfo *TRI, MVT VT) 480 const override; 481 482 bool isHvxOperation(SDValue Op) const; 483 bool isHvxOperation(SDNode *N) const; 484 SDValue LowerHvxOperation(SDValue Op, SelectionDAG &DAG) const; 485 void LowerHvxOperationWrapper(SDNode *N, SmallVectorImpl<SDValue> &Results, 486 SelectionDAG &DAG) const; 487 void ReplaceHvxNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results, 488 SelectionDAG &DAG) const; 489 SDValue PerformHvxDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const; 490 }; 491 492 } // end namespace llvm 493 494 #endif // LLVM_LIB_TARGET_HEXAGON_HEXAGONISELLOWERING_H 495