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/Target/TargetData.h" 24using 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. 33void 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 39void 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 Vals.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, 128 EVT::getIntegerVT( 129 *DAG.getContext(), 130 LHS.getValueType().getSizeInBits() << 1), 131 LHS, RHS)); 132 } 133 Lo = Vals[Slot++]; 134 Hi = Vals[Slot++]; 135 136 if (TLI.isBigEndian()) 137 std::swap(Lo, Hi); 138 139 return; 140 } 141 } 142 143 // Lower the bit-convert to a store/load from the stack. 144 assert(NOutVT.isByteSized() && "Expanded type not byte sized!"); 145 146 // Create the stack frame object. Make sure it is aligned for both 147 // the source and expanded destination types. 148 unsigned Alignment = 149 TLI.getTargetData()->getPrefTypeAlignment(NOutVT. 150 getTypeForEVT(*DAG.getContext())); 151 SDValue StackPtr = DAG.CreateStackTemporary(InVT, Alignment); 152 int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex(); 153 MachinePointerInfo PtrInfo = MachinePointerInfo::getFixedStack(SPFI); 154 155 // Emit a store to the stack slot. 156 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, InOp, StackPtr, PtrInfo, 157 false, false, 0); 158 159 // Load the first half from the stack slot. 160 Lo = DAG.getLoad(NOutVT, dl, Store, StackPtr, PtrInfo, 161 false, false, false, 0); 162 163 // Increment the pointer to the other half. 164 unsigned IncrementSize = NOutVT.getSizeInBits() / 8; 165 StackPtr = DAG.getNode(ISD::ADD, dl, StackPtr.getValueType(), StackPtr, 166 DAG.getIntPtrConstant(IncrementSize)); 167 168 // Load the second half from the stack slot. 169 Hi = DAG.getLoad(NOutVT, dl, Store, StackPtr, 170 PtrInfo.getWithOffset(IncrementSize), false, 171 false, false, MinAlign(Alignment, IncrementSize)); 172 173 // Handle endianness of the load. 174 if (TLI.isBigEndian()) 175 std::swap(Lo, Hi); 176} 177 178void DAGTypeLegalizer::ExpandRes_BUILD_PAIR(SDNode *N, SDValue &Lo, 179 SDValue &Hi) { 180 // Return the operands. 181 Lo = N->getOperand(0); 182 Hi = N->getOperand(1); 183} 184 185void DAGTypeLegalizer::ExpandRes_EXTRACT_ELEMENT(SDNode *N, SDValue &Lo, 186 SDValue &Hi) { 187 GetExpandedOp(N->getOperand(0), Lo, Hi); 188 SDValue Part = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() ? 189 Hi : Lo; 190 191 assert(Part.getValueType() == N->getValueType(0) && 192 "Type twice as big as expanded type not itself expanded!"); 193 194 GetPairElements(Part, Lo, Hi); 195} 196 197void DAGTypeLegalizer::ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, 198 SDValue &Hi) { 199 SDValue OldVec = N->getOperand(0); 200 unsigned OldElts = OldVec.getValueType().getVectorNumElements(); 201 EVT OldEltVT = OldVec.getValueType().getVectorElementType(); 202 DebugLoc dl = N->getDebugLoc(); 203 204 // Convert to a vector of the expanded element type, for example 205 // <3 x i64> -> <6 x i32>. 206 EVT OldVT = N->getValueType(0); 207 EVT NewVT = TLI.getTypeToTransformTo(*DAG.getContext(), OldVT); 208 209 if (OldVT != OldEltVT) { 210 // The result of EXTRACT_VECTOR_ELT may be larger than the element type of 211 // the input vector. If so, extend the elements of the input vector to the 212 // same bitwidth as the result before expanding. 213 assert(OldEltVT.bitsLT(OldVT) && "Result type smaller then element type!"); 214 EVT NVecVT = EVT::getVectorVT(*DAG.getContext(), OldVT, OldElts); 215 OldVec = DAG.getNode(ISD::ANY_EXTEND, dl, NVecVT, N->getOperand(0)); 216 } 217 218 SDValue NewVec = DAG.getNode(ISD::BITCAST, dl, 219 EVT::getVectorVT(*DAG.getContext(), 220 NewVT, 2*OldElts), 221 OldVec); 222 223 // Extract the elements at 2 * Idx and 2 * Idx + 1 from the new vector. 224 SDValue Idx = N->getOperand(1); 225 226 // Make sure the type of Idx is big enough to hold the new values. 227 if (Idx.getValueType().bitsLT(TLI.getPointerTy())) 228 Idx = DAG.getNode(ISD::ZERO_EXTEND, dl, TLI.getPointerTy(), Idx); 229 230 Idx = DAG.getNode(ISD::ADD, dl, Idx.getValueType(), Idx, Idx); 231 Lo = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NewVT, NewVec, Idx); 232 233 Idx = DAG.getNode(ISD::ADD, dl, Idx.getValueType(), Idx, 234 DAG.getConstant(1, Idx.getValueType())); 235 Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NewVT, NewVec, Idx); 236 237 if (TLI.isBigEndian()) 238 std::swap(Lo, Hi); 239} 240 241void DAGTypeLegalizer::ExpandRes_NormalLoad(SDNode *N, SDValue &Lo, 242 SDValue &Hi) { 243 assert(ISD::isNormalLoad(N) && "This routine only for normal loads!"); 244 DebugLoc dl = N->getDebugLoc(); 245 246 LoadSDNode *LD = cast<LoadSDNode>(N); 247 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0)); 248 SDValue Chain = LD->getChain(); 249 SDValue Ptr = LD->getBasePtr(); 250 unsigned Alignment = LD->getAlignment(); 251 bool isVolatile = LD->isVolatile(); 252 bool isNonTemporal = LD->isNonTemporal(); 253 bool isInvariant = LD->isInvariant(); 254 255 assert(NVT.isByteSized() && "Expanded type not byte sized!"); 256 257 Lo = DAG.getLoad(NVT, dl, Chain, Ptr, LD->getPointerInfo(), 258 isVolatile, isNonTemporal, isInvariant, Alignment); 259 260 // Increment the pointer to the other half. 261 unsigned IncrementSize = NVT.getSizeInBits() / 8; 262 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, 263 DAG.getIntPtrConstant(IncrementSize)); 264 Hi = DAG.getLoad(NVT, dl, Chain, Ptr, 265 LD->getPointerInfo().getWithOffset(IncrementSize), 266 isVolatile, isNonTemporal, isInvariant, 267 MinAlign(Alignment, IncrementSize)); 268 269 // Build a factor node to remember that this load is independent of the 270 // other one. 271 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1), 272 Hi.getValue(1)); 273 274 // Handle endianness of the load. 275 if (TLI.isBigEndian()) 276 std::swap(Lo, Hi); 277 278 // Modified the chain - switch anything that used the old chain to use 279 // the new one. 280 ReplaceValueWith(SDValue(N, 1), Chain); 281} 282 283void DAGTypeLegalizer::ExpandRes_VAARG(SDNode *N, SDValue &Lo, SDValue &Hi) { 284 EVT OVT = N->getValueType(0); 285 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), OVT); 286 SDValue Chain = N->getOperand(0); 287 SDValue Ptr = N->getOperand(1); 288 DebugLoc dl = N->getDebugLoc(); 289 const unsigned Align = N->getConstantOperandVal(3); 290 291 Lo = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2), Align); 292 Hi = DAG.getVAArg(NVT, dl, Lo.getValue(1), Ptr, N->getOperand(2), 0); 293 294 // Handle endianness of the load. 295 if (TLI.isBigEndian()) 296 std::swap(Lo, Hi); 297 298 // Modified the chain - switch anything that used the old chain to use 299 // the new one. 300 ReplaceValueWith(SDValue(N, 1), Hi.getValue(1)); 301} 302 303 304//===--------------------------------------------------------------------===// 305// Generic Operand Expansion. 306//===--------------------------------------------------------------------===// 307 308SDValue DAGTypeLegalizer::ExpandOp_BITCAST(SDNode *N) { 309 DebugLoc dl = N->getDebugLoc(); 310 if (N->getValueType(0).isVector()) { 311 // An illegal expanding type is being converted to a legal vector type. 312 // Make a two element vector out of the expanded parts and convert that 313 // instead, but only if the new vector type is legal (otherwise there 314 // is no point, and it might create expansion loops). For example, on 315 // x86 this turns v1i64 = BITCAST i64 into v1i64 = BITCAST v2i32. 316 EVT OVT = N->getOperand(0).getValueType(); 317 EVT NVT = EVT::getVectorVT(*DAG.getContext(), 318 TLI.getTypeToTransformTo(*DAG.getContext(), OVT), 319 2); 320 321 if (isTypeLegal(NVT)) { 322 SDValue Parts[2]; 323 GetExpandedOp(N->getOperand(0), Parts[0], Parts[1]); 324 325 if (TLI.isBigEndian()) 326 std::swap(Parts[0], Parts[1]); 327 328 SDValue Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, NVT, Parts, 2); 329 return DAG.getNode(ISD::BITCAST, dl, N->getValueType(0), Vec); 330 } 331 } 332 333 // Otherwise, store to a temporary and load out again as the new type. 334 return CreateStackStoreLoad(N->getOperand(0), N->getValueType(0)); 335} 336 337SDValue DAGTypeLegalizer::ExpandOp_BUILD_VECTOR(SDNode *N) { 338 // The vector type is legal but the element type needs expansion. 339 EVT VecVT = N->getValueType(0); 340 unsigned NumElts = VecVT.getVectorNumElements(); 341 EVT OldVT = N->getOperand(0).getValueType(); 342 EVT NewVT = TLI.getTypeToTransformTo(*DAG.getContext(), OldVT); 343 DebugLoc dl = N->getDebugLoc(); 344 345 assert(OldVT == VecVT.getVectorElementType() && 346 "BUILD_VECTOR operand type doesn't match vector element type!"); 347 348 // Build a vector of twice the length out of the expanded elements. 349 // For example <3 x i64> -> <6 x i32>. 350 std::vector<SDValue> NewElts; 351 NewElts.reserve(NumElts*2); 352 353 for (unsigned i = 0; i < NumElts; ++i) { 354 SDValue Lo, Hi; 355 GetExpandedOp(N->getOperand(i), Lo, Hi); 356 if (TLI.isBigEndian()) 357 std::swap(Lo, Hi); 358 NewElts.push_back(Lo); 359 NewElts.push_back(Hi); 360 } 361 362 SDValue NewVec = DAG.getNode(ISD::BUILD_VECTOR, dl, 363 EVT::getVectorVT(*DAG.getContext(), 364 NewVT, NewElts.size()), 365 &NewElts[0], NewElts.size()); 366 367 // Convert the new vector to the old vector type. 368 return DAG.getNode(ISD::BITCAST, dl, VecVT, NewVec); 369} 370 371SDValue DAGTypeLegalizer::ExpandOp_EXTRACT_ELEMENT(SDNode *N) { 372 SDValue Lo, Hi; 373 GetExpandedOp(N->getOperand(0), Lo, Hi); 374 return cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() ? Hi : Lo; 375} 376 377SDValue DAGTypeLegalizer::ExpandOp_INSERT_VECTOR_ELT(SDNode *N) { 378 // The vector type is legal but the element type needs expansion. 379 EVT VecVT = N->getValueType(0); 380 unsigned NumElts = VecVT.getVectorNumElements(); 381 DebugLoc dl = N->getDebugLoc(); 382 383 SDValue Val = N->getOperand(1); 384 EVT OldEVT = Val.getValueType(); 385 EVT NewEVT = TLI.getTypeToTransformTo(*DAG.getContext(), OldEVT); 386 387 assert(OldEVT == VecVT.getVectorElementType() && 388 "Inserted element type doesn't match vector element type!"); 389 390 // Bitconvert to a vector of twice the length with elements of the expanded 391 // type, insert the expanded vector elements, and then convert back. 392 EVT NewVecVT = EVT::getVectorVT(*DAG.getContext(), NewEVT, NumElts*2); 393 SDValue NewVec = DAG.getNode(ISD::BITCAST, dl, 394 NewVecVT, N->getOperand(0)); 395 396 SDValue Lo, Hi; 397 GetExpandedOp(Val, Lo, Hi); 398 if (TLI.isBigEndian()) 399 std::swap(Lo, Hi); 400 401 SDValue Idx = N->getOperand(2); 402 Idx = DAG.getNode(ISD::ADD, dl, Idx.getValueType(), Idx, Idx); 403 NewVec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, NewVecVT, NewVec, Lo, Idx); 404 Idx = DAG.getNode(ISD::ADD, dl, 405 Idx.getValueType(), Idx, DAG.getIntPtrConstant(1)); 406 NewVec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, NewVecVT, NewVec, Hi, Idx); 407 408 // Convert the new vector to the old vector type. 409 return DAG.getNode(ISD::BITCAST, dl, VecVT, NewVec); 410} 411 412SDValue DAGTypeLegalizer::ExpandOp_SCALAR_TO_VECTOR(SDNode *N) { 413 DebugLoc dl = N->getDebugLoc(); 414 EVT VT = N->getValueType(0); 415 assert(VT.getVectorElementType() == N->getOperand(0).getValueType() && 416 "SCALAR_TO_VECTOR operand type doesn't match vector element type!"); 417 unsigned NumElts = VT.getVectorNumElements(); 418 SmallVector<SDValue, 16> Ops(NumElts); 419 Ops[0] = N->getOperand(0); 420 SDValue UndefVal = DAG.getUNDEF(Ops[0].getValueType()); 421 for (unsigned i = 1; i < NumElts; ++i) 422 Ops[i] = UndefVal; 423 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &Ops[0], NumElts); 424} 425 426SDValue DAGTypeLegalizer::ExpandOp_NormalStore(SDNode *N, unsigned OpNo) { 427 assert(ISD::isNormalStore(N) && "This routine only for normal stores!"); 428 assert(OpNo == 1 && "Can only expand the stored value so far"); 429 DebugLoc dl = N->getDebugLoc(); 430 431 StoreSDNode *St = cast<StoreSDNode>(N); 432 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), 433 St->getValue().getValueType()); 434 SDValue Chain = St->getChain(); 435 SDValue Ptr = St->getBasePtr(); 436 unsigned Alignment = St->getAlignment(); 437 bool isVolatile = St->isVolatile(); 438 bool isNonTemporal = St->isNonTemporal(); 439 440 assert(NVT.isByteSized() && "Expanded type not byte sized!"); 441 unsigned IncrementSize = NVT.getSizeInBits() / 8; 442 443 SDValue Lo, Hi; 444 GetExpandedOp(St->getValue(), Lo, Hi); 445 446 if (TLI.isBigEndian()) 447 std::swap(Lo, Hi); 448 449 Lo = DAG.getStore(Chain, dl, Lo, Ptr, St->getPointerInfo(), 450 isVolatile, isNonTemporal, Alignment); 451 452 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, 453 DAG.getIntPtrConstant(IncrementSize)); 454 assert(isTypeLegal(Ptr.getValueType()) && "Pointers must be legal!"); 455 Hi = DAG.getStore(Chain, dl, Hi, Ptr, 456 St->getPointerInfo().getWithOffset(IncrementSize), 457 isVolatile, isNonTemporal, 458 MinAlign(Alignment, IncrementSize)); 459 460 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo, Hi); 461} 462 463 464//===--------------------------------------------------------------------===// 465// Generic Result Splitting. 466//===--------------------------------------------------------------------===// 467 468// Be careful to make no assumptions about which of Lo/Hi is stored first in 469// memory (for vectors it is always Lo first followed by Hi in the following 470// bytes; for integers and floats it is Lo first if and only if the machine is 471// little-endian). 472 473void DAGTypeLegalizer::SplitRes_MERGE_VALUES(SDNode *N, unsigned ResNo, 474 SDValue &Lo, SDValue &Hi) { 475 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo); 476 GetSplitOp(Op, Lo, Hi); 477} 478 479void DAGTypeLegalizer::SplitRes_SELECT(SDNode *N, SDValue &Lo, 480 SDValue &Hi) { 481 SDValue LL, LH, RL, RH, CL, CH; 482 DebugLoc dl = N->getDebugLoc(); 483 GetSplitOp(N->getOperand(1), LL, LH); 484 GetSplitOp(N->getOperand(2), RL, RH); 485 486 SDValue Cond = N->getOperand(0); 487 CL = CH = Cond; 488 if (Cond.getValueType().isVector()) { 489 assert(Cond.getValueType().getVectorElementType() == MVT::i1 && 490 "Condition legalized before result?"); 491 unsigned NumElements = Cond.getValueType().getVectorNumElements(); 492 EVT VCondTy = EVT::getVectorVT(*DAG.getContext(), MVT::i1, NumElements / 2); 493 CL = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VCondTy, Cond, 494 DAG.getIntPtrConstant(0)); 495 CH = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VCondTy, Cond, 496 DAG.getIntPtrConstant(NumElements / 2)); 497 } 498 499 Lo = DAG.getNode(N->getOpcode(), dl, LL.getValueType(), CL, LL, RL); 500 Hi = DAG.getNode(N->getOpcode(), dl, LH.getValueType(), CH, LH, RH); 501} 502 503void DAGTypeLegalizer::SplitRes_SELECT_CC(SDNode *N, SDValue &Lo, 504 SDValue &Hi) { 505 SDValue LL, LH, RL, RH; 506 DebugLoc dl = N->getDebugLoc(); 507 GetSplitOp(N->getOperand(2), LL, LH); 508 GetSplitOp(N->getOperand(3), RL, RH); 509 510 Lo = DAG.getNode(ISD::SELECT_CC, dl, LL.getValueType(), N->getOperand(0), 511 N->getOperand(1), LL, RL, N->getOperand(4)); 512 Hi = DAG.getNode(ISD::SELECT_CC, dl, LH.getValueType(), N->getOperand(0), 513 N->getOperand(1), LH, RH, N->getOperand(4)); 514} 515 516void DAGTypeLegalizer::SplitRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi) { 517 EVT LoVT, HiVT; 518 GetSplitDestVTs(N->getValueType(0), LoVT, HiVT); 519 Lo = DAG.getUNDEF(LoVT); 520 Hi = DAG.getUNDEF(HiVT); 521} 522