1 //===-------- LegalizeTypesGeneric.cpp - Generic type legalization --------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file implements generic type expansion and splitting for LegalizeTypes. 11 // The routines here perform legalization when the details of the type (such as 12 // whether it is an integer or a float) do not matter. 13 // Expansion is the act of changing a computation in an illegal type to be a 14 // computation in two identical registers of a smaller type. The Lo/Hi part 15 // is required to be stored first in memory on little/big-endian machines. 16 // Splitting is the act of changing a computation in an illegal type to be a 17 // computation in two not necessarily identical registers of a smaller type. 18 // There are no requirements on how the type is represented in memory. 19 // 20 //===----------------------------------------------------------------------===// 21 22 #include "LegalizeTypes.h" 23 #include "llvm/IR/DataLayout.h" 24 using namespace llvm; 25 26 //===----------------------------------------------------------------------===// 27 // Generic Result Expansion. 28 //===----------------------------------------------------------------------===// 29 30 // These routines assume that the Lo/Hi part is stored first in memory on 31 // little/big-endian machines, followed by the Hi/Lo part. This means that 32 // they cannot be used as is on vectors, for which Lo is always stored first. 33 void DAGTypeLegalizer::ExpandRes_MERGE_VALUES(SDNode *N, unsigned ResNo, 34 SDValue &Lo, SDValue &Hi) { 35 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo); 36 GetExpandedOp(Op, Lo, Hi); 37 } 38 39 void DAGTypeLegalizer::ExpandRes_BITCAST(SDNode *N, SDValue &Lo, SDValue &Hi) { 40 EVT OutVT = N->getValueType(0); 41 EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT); 42 SDValue InOp = N->getOperand(0); 43 EVT InVT = InOp.getValueType(); 44 DebugLoc dl = N->getDebugLoc(); 45 46 // Handle some special cases efficiently. 47 switch (getTypeAction(InVT)) { 48 case TargetLowering::TypeLegal: 49 case TargetLowering::TypePromoteInteger: 50 break; 51 case TargetLowering::TypeSoftenFloat: 52 // Convert the integer operand instead. 53 SplitInteger(GetSoftenedFloat(InOp), Lo, Hi); 54 Lo = DAG.getNode(ISD::BITCAST, dl, NOutVT, Lo); 55 Hi = DAG.getNode(ISD::BITCAST, dl, NOutVT, Hi); 56 return; 57 case TargetLowering::TypeExpandInteger: 58 case TargetLowering::TypeExpandFloat: 59 // Convert the expanded pieces of the input. 60 GetExpandedOp(InOp, Lo, Hi); 61 Lo = DAG.getNode(ISD::BITCAST, dl, NOutVT, Lo); 62 Hi = DAG.getNode(ISD::BITCAST, dl, NOutVT, Hi); 63 return; 64 case TargetLowering::TypeSplitVector: 65 GetSplitVector(InOp, Lo, Hi); 66 if (TLI.isBigEndian()) 67 std::swap(Lo, Hi); 68 Lo = DAG.getNode(ISD::BITCAST, dl, NOutVT, Lo); 69 Hi = DAG.getNode(ISD::BITCAST, dl, NOutVT, Hi); 70 return; 71 case TargetLowering::TypeScalarizeVector: 72 // Convert the element instead. 73 SplitInteger(BitConvertToInteger(GetScalarizedVector(InOp)), Lo, Hi); 74 Lo = DAG.getNode(ISD::BITCAST, dl, NOutVT, Lo); 75 Hi = DAG.getNode(ISD::BITCAST, dl, NOutVT, Hi); 76 return; 77 case TargetLowering::TypeWidenVector: { 78 assert(!(InVT.getVectorNumElements() & 1) && "Unsupported BITCAST"); 79 InOp = GetWidenedVector(InOp); 80 EVT InNVT = EVT::getVectorVT(*DAG.getContext(), InVT.getVectorElementType(), 81 InVT.getVectorNumElements()/2); 82 Lo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, InNVT, InOp, 83 DAG.getIntPtrConstant(0)); 84 Hi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, InNVT, InOp, 85 DAG.getIntPtrConstant(InNVT.getVectorNumElements())); 86 if (TLI.isBigEndian()) 87 std::swap(Lo, Hi); 88 Lo = DAG.getNode(ISD::BITCAST, dl, NOutVT, Lo); 89 Hi = DAG.getNode(ISD::BITCAST, dl, NOutVT, Hi); 90 return; 91 } 92 } 93 94 if (InVT.isVector() && OutVT.isInteger()) { 95 // Handle cases like i64 = BITCAST v1i64 on x86, where the operand 96 // is legal but the result is not. 97 unsigned NumElems = 2; 98 EVT ElemVT = NOutVT; 99 EVT NVT = EVT::getVectorVT(*DAG.getContext(), ElemVT, NumElems); 100 101 // If <ElemVT * N> is not a legal type, try <ElemVT/2 * (N*2)>. 102 while (!isTypeLegal(NVT)) { 103 unsigned NewSizeInBits = ElemVT.getSizeInBits() / 2; 104 // If the element size is smaller than byte, bail. 105 if (NewSizeInBits < 8) 106 break; 107 NumElems *= 2; 108 ElemVT = EVT::getIntegerVT(*DAG.getContext(), NewSizeInBits); 109 NVT = EVT::getVectorVT(*DAG.getContext(), ElemVT, NumElems); 110 } 111 112 if (isTypeLegal(NVT)) { 113 SDValue CastInOp = DAG.getNode(ISD::BITCAST, dl, NVT, InOp); 114 115 SmallVector<SDValue, 8> Vals; 116 for (unsigned i = 0; i < NumElems; ++i) 117 Vals.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, ElemVT, 118 CastInOp, DAG.getIntPtrConstant(i))); 119 120 // Build Lo, Hi pair by pairing extracted elements if needed. 121 unsigned Slot = 0; 122 for (unsigned e = Vals.size(); e - Slot > 2; Slot += 2, e += 1) { 123 // Each iteration will BUILD_PAIR two nodes and append the result until 124 // there are only two nodes left, i.e. Lo and Hi. 125 SDValue LHS = Vals[Slot]; 126 SDValue RHS = Vals[Slot + 1]; 127 128 if (TLI.isBigEndian()) 129 std::swap(LHS, RHS); 130 131 Vals.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, 132 EVT::getIntegerVT( 133 *DAG.getContext(), 134 LHS.getValueType().getSizeInBits() << 1), 135 LHS, RHS)); 136 } 137 Lo = Vals[Slot++]; 138 Hi = Vals[Slot++]; 139 140 if (TLI.isBigEndian()) 141 std::swap(Lo, Hi); 142 143 return; 144 } 145 } 146 147 // Lower the bit-convert to a store/load from the stack. 148 assert(NOutVT.isByteSized() && "Expanded type not byte sized!"); 149 150 // Create the stack frame object. Make sure it is aligned for both 151 // the source and expanded destination types. 152 unsigned Alignment = 153 TLI.getDataLayout()->getPrefTypeAlignment(NOutVT. 154 getTypeForEVT(*DAG.getContext())); 155 SDValue StackPtr = DAG.CreateStackTemporary(InVT, Alignment); 156 int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex(); 157 MachinePointerInfo PtrInfo = MachinePointerInfo::getFixedStack(SPFI); 158 159 // Emit a store to the stack slot. 160 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, InOp, StackPtr, PtrInfo, 161 false, false, 0); 162 163 // Load the first half from the stack slot. 164 Lo = DAG.getLoad(NOutVT, dl, Store, StackPtr, PtrInfo, 165 false, false, false, 0); 166 167 // Increment the pointer to the other half. 168 unsigned IncrementSize = NOutVT.getSizeInBits() / 8; 169 StackPtr = DAG.getNode(ISD::ADD, dl, StackPtr.getValueType(), StackPtr, 170 DAG.getIntPtrConstant(IncrementSize)); 171 172 // Load the second half from the stack slot. 173 Hi = DAG.getLoad(NOutVT, dl, Store, StackPtr, 174 PtrInfo.getWithOffset(IncrementSize), false, 175 false, false, MinAlign(Alignment, IncrementSize)); 176 177 // Handle endianness of the load. 178 if (TLI.isBigEndian()) 179 std::swap(Lo, Hi); 180 } 181 182 void DAGTypeLegalizer::ExpandRes_BUILD_PAIR(SDNode *N, SDValue &Lo, 183 SDValue &Hi) { 184 // Return the operands. 185 Lo = N->getOperand(0); 186 Hi = N->getOperand(1); 187 } 188 189 void DAGTypeLegalizer::ExpandRes_EXTRACT_ELEMENT(SDNode *N, SDValue &Lo, 190 SDValue &Hi) { 191 GetExpandedOp(N->getOperand(0), Lo, Hi); 192 SDValue Part = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() ? 193 Hi : Lo; 194 195 assert(Part.getValueType() == N->getValueType(0) && 196 "Type twice as big as expanded type not itself expanded!"); 197 198 GetPairElements(Part, Lo, Hi); 199 } 200 201 void DAGTypeLegalizer::ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, 202 SDValue &Hi) { 203 SDValue OldVec = N->getOperand(0); 204 unsigned OldElts = OldVec.getValueType().getVectorNumElements(); 205 EVT OldEltVT = OldVec.getValueType().getVectorElementType(); 206 DebugLoc dl = N->getDebugLoc(); 207 208 // Convert to a vector of the expanded element type, for example 209 // <3 x i64> -> <6 x i32>. 210 EVT OldVT = N->getValueType(0); 211 EVT NewVT = TLI.getTypeToTransformTo(*DAG.getContext(), OldVT); 212 213 if (OldVT != OldEltVT) { 214 // The result of EXTRACT_VECTOR_ELT may be larger than the element type of 215 // the input vector. If so, extend the elements of the input vector to the 216 // same bitwidth as the result before expanding. 217 assert(OldEltVT.bitsLT(OldVT) && "Result type smaller then element type!"); 218 EVT NVecVT = EVT::getVectorVT(*DAG.getContext(), OldVT, OldElts); 219 OldVec = DAG.getNode(ISD::ANY_EXTEND, dl, NVecVT, N->getOperand(0)); 220 } 221 222 SDValue NewVec = DAG.getNode(ISD::BITCAST, dl, 223 EVT::getVectorVT(*DAG.getContext(), 224 NewVT, 2*OldElts), 225 OldVec); 226 227 // Extract the elements at 2 * Idx and 2 * Idx + 1 from the new vector. 228 SDValue Idx = N->getOperand(1); 229 230 // Make sure the type of Idx is big enough to hold the new values. 231 if (Idx.getValueType().bitsLT(TLI.getPointerTy())) 232 Idx = DAG.getNode(ISD::ZERO_EXTEND, dl, TLI.getPointerTy(), Idx); 233 234 Idx = DAG.getNode(ISD::ADD, dl, Idx.getValueType(), Idx, Idx); 235 Lo = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NewVT, NewVec, Idx); 236 237 Idx = DAG.getNode(ISD::ADD, dl, Idx.getValueType(), Idx, 238 DAG.getConstant(1, Idx.getValueType())); 239 Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NewVT, NewVec, Idx); 240 241 if (TLI.isBigEndian()) 242 std::swap(Lo, Hi); 243 } 244 245 void DAGTypeLegalizer::ExpandRes_NormalLoad(SDNode *N, SDValue &Lo, 246 SDValue &Hi) { 247 assert(ISD::isNormalLoad(N) && "This routine only for normal loads!"); 248 DebugLoc dl = N->getDebugLoc(); 249 250 LoadSDNode *LD = cast<LoadSDNode>(N); 251 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0)); 252 SDValue Chain = LD->getChain(); 253 SDValue Ptr = LD->getBasePtr(); 254 unsigned Alignment = LD->getAlignment(); 255 bool isVolatile = LD->isVolatile(); 256 bool isNonTemporal = LD->isNonTemporal(); 257 bool isInvariant = LD->isInvariant(); 258 259 assert(NVT.isByteSized() && "Expanded type not byte sized!"); 260 261 Lo = DAG.getLoad(NVT, dl, Chain, Ptr, LD->getPointerInfo(), 262 isVolatile, isNonTemporal, isInvariant, Alignment); 263 264 // Increment the pointer to the other half. 265 unsigned IncrementSize = NVT.getSizeInBits() / 8; 266 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, 267 DAG.getIntPtrConstant(IncrementSize)); 268 Hi = DAG.getLoad(NVT, dl, Chain, Ptr, 269 LD->getPointerInfo().getWithOffset(IncrementSize), 270 isVolatile, isNonTemporal, isInvariant, 271 MinAlign(Alignment, IncrementSize)); 272 273 // Build a factor node to remember that this load is independent of the 274 // other one. 275 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1), 276 Hi.getValue(1)); 277 278 // Handle endianness of the load. 279 if (TLI.isBigEndian()) 280 std::swap(Lo, Hi); 281 282 // Modified the chain - switch anything that used the old chain to use 283 // the new one. 284 ReplaceValueWith(SDValue(N, 1), Chain); 285 } 286 287 void DAGTypeLegalizer::ExpandRes_VAARG(SDNode *N, SDValue &Lo, SDValue &Hi) { 288 EVT OVT = N->getValueType(0); 289 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), OVT); 290 SDValue Chain = N->getOperand(0); 291 SDValue Ptr = N->getOperand(1); 292 DebugLoc dl = N->getDebugLoc(); 293 const unsigned Align = N->getConstantOperandVal(3); 294 295 Lo = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2), Align); 296 Hi = DAG.getVAArg(NVT, dl, Lo.getValue(1), Ptr, N->getOperand(2), 0); 297 298 // Handle endianness of the load. 299 if (TLI.isBigEndian()) 300 std::swap(Lo, Hi); 301 302 // Modified the chain - switch anything that used the old chain to use 303 // the new one. 304 ReplaceValueWith(SDValue(N, 1), Hi.getValue(1)); 305 } 306 307 308 //===--------------------------------------------------------------------===// 309 // Generic Operand Expansion. 310 //===--------------------------------------------------------------------===// 311 312 SDValue DAGTypeLegalizer::ExpandOp_BITCAST(SDNode *N) { 313 DebugLoc dl = N->getDebugLoc(); 314 if (N->getValueType(0).isVector()) { 315 // An illegal expanding type is being converted to a legal vector type. 316 // Make a two element vector out of the expanded parts and convert that 317 // instead, but only if the new vector type is legal (otherwise there 318 // is no point, and it might create expansion loops). For example, on 319 // x86 this turns v1i64 = BITCAST i64 into v1i64 = BITCAST v2i32. 320 EVT OVT = N->getOperand(0).getValueType(); 321 EVT NVT = EVT::getVectorVT(*DAG.getContext(), 322 TLI.getTypeToTransformTo(*DAG.getContext(), OVT), 323 2); 324 325 if (isTypeLegal(NVT)) { 326 SDValue Parts[2]; 327 GetExpandedOp(N->getOperand(0), Parts[0], Parts[1]); 328 329 if (TLI.isBigEndian()) 330 std::swap(Parts[0], Parts[1]); 331 332 SDValue Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, NVT, Parts, 2); 333 return DAG.getNode(ISD::BITCAST, dl, N->getValueType(0), Vec); 334 } 335 } 336 337 // Otherwise, store to a temporary and load out again as the new type. 338 return CreateStackStoreLoad(N->getOperand(0), N->getValueType(0)); 339 } 340 341 SDValue DAGTypeLegalizer::ExpandOp_BUILD_VECTOR(SDNode *N) { 342 // The vector type is legal but the element type needs expansion. 343 EVT VecVT = N->getValueType(0); 344 unsigned NumElts = VecVT.getVectorNumElements(); 345 EVT OldVT = N->getOperand(0).getValueType(); 346 EVT NewVT = TLI.getTypeToTransformTo(*DAG.getContext(), OldVT); 347 DebugLoc dl = N->getDebugLoc(); 348 349 assert(OldVT == VecVT.getVectorElementType() && 350 "BUILD_VECTOR operand type doesn't match vector element type!"); 351 352 // Build a vector of twice the length out of the expanded elements. 353 // For example <3 x i64> -> <6 x i32>. 354 std::vector<SDValue> NewElts; 355 NewElts.reserve(NumElts*2); 356 357 for (unsigned i = 0; i < NumElts; ++i) { 358 SDValue Lo, Hi; 359 GetExpandedOp(N->getOperand(i), Lo, Hi); 360 if (TLI.isBigEndian()) 361 std::swap(Lo, Hi); 362 NewElts.push_back(Lo); 363 NewElts.push_back(Hi); 364 } 365 366 SDValue NewVec = DAG.getNode(ISD::BUILD_VECTOR, dl, 367 EVT::getVectorVT(*DAG.getContext(), 368 NewVT, NewElts.size()), 369 &NewElts[0], NewElts.size()); 370 371 // Convert the new vector to the old vector type. 372 return DAG.getNode(ISD::BITCAST, dl, VecVT, NewVec); 373 } 374 375 SDValue DAGTypeLegalizer::ExpandOp_EXTRACT_ELEMENT(SDNode *N) { 376 SDValue Lo, Hi; 377 GetExpandedOp(N->getOperand(0), Lo, Hi); 378 return cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() ? Hi : Lo; 379 } 380 381 SDValue DAGTypeLegalizer::ExpandOp_INSERT_VECTOR_ELT(SDNode *N) { 382 // The vector type is legal but the element type needs expansion. 383 EVT VecVT = N->getValueType(0); 384 unsigned NumElts = VecVT.getVectorNumElements(); 385 DebugLoc dl = N->getDebugLoc(); 386 387 SDValue Val = N->getOperand(1); 388 EVT OldEVT = Val.getValueType(); 389 EVT NewEVT = TLI.getTypeToTransformTo(*DAG.getContext(), OldEVT); 390 391 assert(OldEVT == VecVT.getVectorElementType() && 392 "Inserted element type doesn't match vector element type!"); 393 394 // Bitconvert to a vector of twice the length with elements of the expanded 395 // type, insert the expanded vector elements, and then convert back. 396 EVT NewVecVT = EVT::getVectorVT(*DAG.getContext(), NewEVT, NumElts*2); 397 SDValue NewVec = DAG.getNode(ISD::BITCAST, dl, 398 NewVecVT, N->getOperand(0)); 399 400 SDValue Lo, Hi; 401 GetExpandedOp(Val, Lo, Hi); 402 if (TLI.isBigEndian()) 403 std::swap(Lo, Hi); 404 405 SDValue Idx = N->getOperand(2); 406 Idx = DAG.getNode(ISD::ADD, dl, Idx.getValueType(), Idx, Idx); 407 NewVec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, NewVecVT, NewVec, Lo, Idx); 408 Idx = DAG.getNode(ISD::ADD, dl, 409 Idx.getValueType(), Idx, DAG.getIntPtrConstant(1)); 410 NewVec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, NewVecVT, NewVec, Hi, Idx); 411 412 // Convert the new vector to the old vector type. 413 return DAG.getNode(ISD::BITCAST, dl, VecVT, NewVec); 414 } 415 416 SDValue DAGTypeLegalizer::ExpandOp_SCALAR_TO_VECTOR(SDNode *N) { 417 DebugLoc dl = N->getDebugLoc(); 418 EVT VT = N->getValueType(0); 419 assert(VT.getVectorElementType() == N->getOperand(0).getValueType() && 420 "SCALAR_TO_VECTOR operand type doesn't match vector element type!"); 421 unsigned NumElts = VT.getVectorNumElements(); 422 SmallVector<SDValue, 16> Ops(NumElts); 423 Ops[0] = N->getOperand(0); 424 SDValue UndefVal = DAG.getUNDEF(Ops[0].getValueType()); 425 for (unsigned i = 1; i < NumElts; ++i) 426 Ops[i] = UndefVal; 427 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &Ops[0], NumElts); 428 } 429 430 SDValue DAGTypeLegalizer::ExpandOp_NormalStore(SDNode *N, unsigned OpNo) { 431 assert(ISD::isNormalStore(N) && "This routine only for normal stores!"); 432 assert(OpNo == 1 && "Can only expand the stored value so far"); 433 DebugLoc dl = N->getDebugLoc(); 434 435 StoreSDNode *St = cast<StoreSDNode>(N); 436 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 437 St->getValue().getValueType()); 438 SDValue Chain = St->getChain(); 439 SDValue Ptr = St->getBasePtr(); 440 unsigned Alignment = St->getAlignment(); 441 bool isVolatile = St->isVolatile(); 442 bool isNonTemporal = St->isNonTemporal(); 443 444 assert(NVT.isByteSized() && "Expanded type not byte sized!"); 445 unsigned IncrementSize = NVT.getSizeInBits() / 8; 446 447 SDValue Lo, Hi; 448 GetExpandedOp(St->getValue(), Lo, Hi); 449 450 if (TLI.isBigEndian()) 451 std::swap(Lo, Hi); 452 453 Lo = DAG.getStore(Chain, dl, Lo, Ptr, St->getPointerInfo(), 454 isVolatile, isNonTemporal, Alignment); 455 456 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, 457 DAG.getIntPtrConstant(IncrementSize)); 458 assert(isTypeLegal(Ptr.getValueType()) && "Pointers must be legal!"); 459 Hi = DAG.getStore(Chain, dl, Hi, Ptr, 460 St->getPointerInfo().getWithOffset(IncrementSize), 461 isVolatile, isNonTemporal, 462 MinAlign(Alignment, IncrementSize)); 463 464 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo, Hi); 465 } 466 467 468 //===--------------------------------------------------------------------===// 469 // Generic Result Splitting. 470 //===--------------------------------------------------------------------===// 471 472 // Be careful to make no assumptions about which of Lo/Hi is stored first in 473 // memory (for vectors it is always Lo first followed by Hi in the following 474 // bytes; for integers and floats it is Lo first if and only if the machine is 475 // little-endian). 476 477 void DAGTypeLegalizer::SplitRes_MERGE_VALUES(SDNode *N, unsigned ResNo, 478 SDValue &Lo, SDValue &Hi) { 479 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo); 480 GetSplitOp(Op, Lo, Hi); 481 } 482 483 void DAGTypeLegalizer::SplitRes_SELECT(SDNode *N, SDValue &Lo, 484 SDValue &Hi) { 485 SDValue LL, LH, RL, RH, CL, CH; 486 DebugLoc dl = N->getDebugLoc(); 487 GetSplitOp(N->getOperand(1), LL, LH); 488 GetSplitOp(N->getOperand(2), RL, RH); 489 490 SDValue Cond = N->getOperand(0); 491 CL = CH = Cond; 492 if (Cond.getValueType().isVector()) { 493 assert(Cond.getValueType().getVectorElementType() == MVT::i1 && 494 "Condition legalized before result?"); 495 unsigned NumElements = Cond.getValueType().getVectorNumElements(); 496 EVT VCondTy = EVT::getVectorVT(*DAG.getContext(), MVT::i1, NumElements / 2); 497 CL = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VCondTy, Cond, 498 DAG.getIntPtrConstant(0)); 499 CH = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VCondTy, Cond, 500 DAG.getIntPtrConstant(NumElements / 2)); 501 } 502 503 Lo = DAG.getNode(N->getOpcode(), dl, LL.getValueType(), CL, LL, RL); 504 Hi = DAG.getNode(N->getOpcode(), dl, LH.getValueType(), CH, LH, RH); 505 } 506 507 void DAGTypeLegalizer::SplitRes_SELECT_CC(SDNode *N, SDValue &Lo, 508 SDValue &Hi) { 509 SDValue LL, LH, RL, RH; 510 DebugLoc dl = N->getDebugLoc(); 511 GetSplitOp(N->getOperand(2), LL, LH); 512 GetSplitOp(N->getOperand(3), RL, RH); 513 514 Lo = DAG.getNode(ISD::SELECT_CC, dl, LL.getValueType(), N->getOperand(0), 515 N->getOperand(1), LL, RL, N->getOperand(4)); 516 Hi = DAG.getNode(ISD::SELECT_CC, dl, LH.getValueType(), N->getOperand(0), 517 N->getOperand(1), LH, RH, N->getOperand(4)); 518 } 519 520 void DAGTypeLegalizer::SplitRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi) { 521 EVT LoVT, HiVT; 522 GetSplitDestVTs(N->getValueType(0), LoVT, HiVT); 523 Lo = DAG.getUNDEF(LoVT); 524 Hi = DAG.getUNDEF(HiVT); 525 } 526