LegalizeTypes.h revision 2d6dcb34b7f39682f3eed08180631189fb4b6636
1//===-- LegalizeTypes.h - Definition of the DAG Type Legalizer class ------===// 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 defines the DAGTypeLegalizer class. This is a private interface 11// shared between the code that implements the SelectionDAG::LegalizeTypes 12// method. 13// 14//===----------------------------------------------------------------------===// 15 16#ifndef SELECTIONDAG_LEGALIZETYPES_H 17#define SELECTIONDAG_LEGALIZETYPES_H 18 19#define DEBUG_TYPE "legalize-types" 20#include "llvm/CodeGen/SelectionDAG.h" 21#include "llvm/Target/TargetLowering.h" 22#include "llvm/ADT/DenseMap.h" 23#include "llvm/ADT/DenseSet.h" 24#include "llvm/Support/Compiler.h" 25#include "llvm/Support/Debug.h" 26 27namespace llvm { 28 29//===----------------------------------------------------------------------===// 30/// DAGTypeLegalizer - This takes an arbitrary SelectionDAG as input and hacks 31/// on it until only value types the target machine can handle are left. This 32/// involves promoting small sizes to large sizes or splitting up large values 33/// into small values. 34/// 35class LLVM_LIBRARY_VISIBILITY DAGTypeLegalizer { 36 const TargetLowering &TLI; 37 SelectionDAG &DAG; 38public: 39 // NodeIdFlags - This pass uses the NodeId on the SDNodes to hold information 40 // about the state of the node. The enum has all the values. 41 enum NodeIdFlags { 42 /// ReadyToProcess - All operands have been processed, so this node is ready 43 /// to be handled. 44 ReadyToProcess = 0, 45 46 /// NewNode - This is a new node, not before seen, that was created in the 47 /// process of legalizing some other node. 48 NewNode = -1, 49 50 /// Unanalyzed - This node's ID needs to be set to the number of its 51 /// unprocessed operands. 52 Unanalyzed = -2, 53 54 /// Processed - This is a node that has already been processed. 55 Processed = -3 56 57 // 1+ - This is a node which has this many unprocessed operands. 58 }; 59private: 60 enum LegalizeAction { 61 Legal, // The target natively supports this type. 62 PromoteInteger, // Replace this integer type with a larger one. 63 ExpandInteger, // Split this integer type into two of half the size. 64 SoftenFloat, // Convert this float type to a same size integer type. 65 ExpandFloat, // Split this float type into two of half the size. 66 ScalarizeVector, // Replace this one-element vector with its element type. 67 SplitVector, // Split this vector type into two of half the size. 68 WidenVector // This vector type should be widened into a larger vector. 69 }; 70 71 /// ValueTypeActions - This is a bitvector that contains two bits for each 72 /// simple value type, where the two bits correspond to the LegalizeAction 73 /// enum from TargetLowering. This can be queried with "getTypeAction(VT)". 74 TargetLowering::ValueTypeActionImpl ValueTypeActions; 75 76 /// getTypeAction - Return how we should legalize values of this type. 77 LegalizeAction getTypeAction(EVT VT) const { 78 switch (TLI.getTypeAction(*DAG.getContext(), VT)) { 79 default: 80 assert(false && "Unknown legalize action!"); 81 case TargetLowering::Legal: 82 return Legal; 83 case TargetLowering::Promote: 84 // Promote can mean 85 // 1) For integers, use a larger integer type (e.g. i8 -> i32). 86 // 2) For vectors, use a wider vector type (e.g. v3i32 -> v4i32). 87 if (!VT.isVector()) 88 return PromoteInteger; 89 return WidenVector; 90 case TargetLowering::Expand: 91 // Expand can mean 92 // 1) split scalar in half, 2) convert a float to an integer, 93 // 3) scalarize a single-element vector, 4) split a vector in two. 94 if (!VT.isVector()) { 95 if (VT.isInteger()) 96 return ExpandInteger; 97 if (VT.getSizeInBits() == 98 TLI.getTypeToTransformTo(*DAG.getContext(), VT).getSizeInBits()) 99 return SoftenFloat; 100 return ExpandFloat; 101 } 102 103 if (VT.getVectorNumElements() == 1) 104 return ScalarizeVector; 105 return SplitVector; 106 } 107 } 108 109 /// isTypeLegal - Return true if this type is legal on this target. 110 bool isTypeLegal(EVT VT) const { 111 return TLI.getTypeAction(*DAG.getContext(), VT) == TargetLowering::Legal; 112 } 113 114 /// IgnoreNodeResults - Pretend all of this node's results are legal. 115 bool IgnoreNodeResults(SDNode *N) const { 116 return N->getOpcode() == ISD::TargetConstant; 117 } 118 119 /// PromotedIntegers - For integer nodes that are below legal width, this map 120 /// indicates what promoted value to use. 121 DenseMap<SDValue, SDValue> PromotedIntegers; 122 123 /// ExpandedIntegers - For integer nodes that need to be expanded this map 124 /// indicates which operands are the expanded version of the input. 125 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedIntegers; 126 127 /// SoftenedFloats - For floating point nodes converted to integers of 128 /// the same size, this map indicates the converted value to use. 129 DenseMap<SDValue, SDValue> SoftenedFloats; 130 131 /// ExpandedFloats - For float nodes that need to be expanded this map 132 /// indicates which operands are the expanded version of the input. 133 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedFloats; 134 135 /// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the 136 /// scalar value of type 'ty' to use. 137 DenseMap<SDValue, SDValue> ScalarizedVectors; 138 139 /// SplitVectors - For nodes that need to be split this map indicates 140 /// which operands are the expanded version of the input. 141 DenseMap<SDValue, std::pair<SDValue, SDValue> > SplitVectors; 142 143 /// WidenedVectors - For vector nodes that need to be widened, indicates 144 /// the widened value to use. 145 DenseMap<SDValue, SDValue> WidenedVectors; 146 147 /// ReplacedValues - For values that have been replaced with another, 148 /// indicates the replacement value to use. 149 DenseMap<SDValue, SDValue> ReplacedValues; 150 151 /// Worklist - This defines a worklist of nodes to process. In order to be 152 /// pushed onto this worklist, all operands of a node must have already been 153 /// processed. 154 SmallVector<SDNode*, 128> Worklist; 155 156public: 157 explicit DAGTypeLegalizer(SelectionDAG &dag) 158 : TLI(dag.getTargetLoweringInfo()), DAG(dag), 159 ValueTypeActions(TLI.getValueTypeActions()) { 160 assert(MVT::LAST_VALUETYPE <= MVT::MAX_ALLOWED_VALUETYPE && 161 "Too many value types for ValueTypeActions to hold!"); 162 } 163 164 /// run - This is the main entry point for the type legalizer. This does a 165 /// top-down traversal of the dag, legalizing types as it goes. Returns 166 /// "true" if it made any changes. 167 bool run(); 168 169 void NoteDeletion(SDNode *Old, SDNode *New) { 170 ExpungeNode(Old); 171 ExpungeNode(New); 172 for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i) 173 ReplacedValues[SDValue(Old, i)] = SDValue(New, i); 174 } 175 176private: 177 SDNode *AnalyzeNewNode(SDNode *N); 178 void AnalyzeNewValue(SDValue &Val); 179 void ExpungeNode(SDNode *N); 180 void PerformExpensiveChecks(); 181 void RemapValue(SDValue &N); 182 183 // Common routines. 184 SDValue BitConvertToInteger(SDValue Op); 185 SDValue BitConvertVectorToIntegerVector(SDValue Op); 186 SDValue CreateStackStoreLoad(SDValue Op, EVT DestVT); 187 bool CustomLowerNode(SDNode *N, EVT VT, bool LegalizeResult); 188 bool CustomWidenLowerNode(SDNode *N, EVT VT); 189 SDValue GetVectorElementPointer(SDValue VecPtr, EVT EltVT, SDValue Index); 190 SDValue JoinIntegers(SDValue Lo, SDValue Hi); 191 SDValue LibCallify(RTLIB::Libcall LC, SDNode *N, bool isSigned); 192 SDValue MakeLibCall(RTLIB::Libcall LC, EVT RetVT, 193 const SDValue *Ops, unsigned NumOps, bool isSigned, 194 DebugLoc dl); 195 std::pair<SDValue, SDValue> ExpandChainLibCall(RTLIB::Libcall LC, 196 SDNode *Node, bool isSigned); 197 std::pair<SDValue, SDValue> ExpandAtomic(SDNode *Node); 198 199 SDValue PromoteTargetBoolean(SDValue Bool, EVT VT); 200 void ReplaceValueWith(SDValue From, SDValue To); 201 void SplitInteger(SDValue Op, SDValue &Lo, SDValue &Hi); 202 void SplitInteger(SDValue Op, EVT LoVT, EVT HiVT, 203 SDValue &Lo, SDValue &Hi); 204 205 //===--------------------------------------------------------------------===// 206 // Integer Promotion Support: LegalizeIntegerTypes.cpp 207 //===--------------------------------------------------------------------===// 208 209 /// GetPromotedInteger - Given a processed operand Op which was promoted to a 210 /// larger integer type, this returns the promoted value. The low bits of the 211 /// promoted value corresponding to the original type are exactly equal to Op. 212 /// The extra bits contain rubbish, so the promoted value may need to be zero- 213 /// or sign-extended from the original type before it is usable (the helpers 214 /// SExtPromotedInteger and ZExtPromotedInteger can do this for you). 215 /// For example, if Op is an i16 and was promoted to an i32, then this method 216 /// returns an i32, the lower 16 bits of which coincide with Op, and the upper 217 /// 16 bits of which contain rubbish. 218 SDValue GetPromotedInteger(SDValue Op) { 219 SDValue &PromotedOp = PromotedIntegers[Op]; 220 RemapValue(PromotedOp); 221 assert(PromotedOp.getNode() && "Operand wasn't promoted?"); 222 return PromotedOp; 223 } 224 void SetPromotedInteger(SDValue Op, SDValue Result); 225 226 /// SExtPromotedInteger - Get a promoted operand and sign extend it to the 227 /// final size. 228 SDValue SExtPromotedInteger(SDValue Op) { 229 EVT OldVT = Op.getValueType(); 230 DebugLoc dl = Op.getDebugLoc(); 231 Op = GetPromotedInteger(Op); 232 return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Op.getValueType(), Op, 233 DAG.getValueType(OldVT)); 234 } 235 236 /// ZExtPromotedInteger - Get a promoted operand and zero extend it to the 237 /// final size. 238 SDValue ZExtPromotedInteger(SDValue Op) { 239 EVT OldVT = Op.getValueType(); 240 DebugLoc dl = Op.getDebugLoc(); 241 Op = GetPromotedInteger(Op); 242 return DAG.getZeroExtendInReg(Op, dl, OldVT); 243 } 244 245 // Integer Result Promotion. 246 void PromoteIntegerResult(SDNode *N, unsigned ResNo); 247 SDValue PromoteIntRes_AssertSext(SDNode *N); 248 SDValue PromoteIntRes_AssertZext(SDNode *N); 249 SDValue PromoteIntRes_Atomic1(AtomicSDNode *N); 250 SDValue PromoteIntRes_Atomic2(AtomicSDNode *N); 251 SDValue PromoteIntRes_BITCAST(SDNode *N); 252 SDValue PromoteIntRes_BSWAP(SDNode *N); 253 SDValue PromoteIntRes_BUILD_PAIR(SDNode *N); 254 SDValue PromoteIntRes_Constant(SDNode *N); 255 SDValue PromoteIntRes_CONVERT_RNDSAT(SDNode *N); 256 SDValue PromoteIntRes_CTLZ(SDNode *N); 257 SDValue PromoteIntRes_CTPOP(SDNode *N); 258 SDValue PromoteIntRes_CTTZ(SDNode *N); 259 SDValue PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N); 260 SDValue PromoteIntRes_FP_TO_XINT(SDNode *N); 261 SDValue PromoteIntRes_FP32_TO_FP16(SDNode *N); 262 SDValue PromoteIntRes_INT_EXTEND(SDNode *N); 263 SDValue PromoteIntRes_LOAD(LoadSDNode *N); 264 SDValue PromoteIntRes_Overflow(SDNode *N); 265 SDValue PromoteIntRes_SADDSUBO(SDNode *N, unsigned ResNo); 266 SDValue PromoteIntRes_SDIV(SDNode *N); 267 SDValue PromoteIntRes_SELECT(SDNode *N); 268 SDValue PromoteIntRes_SELECT_CC(SDNode *N); 269 SDValue PromoteIntRes_SETCC(SDNode *N); 270 SDValue PromoteIntRes_SHL(SDNode *N); 271 SDValue PromoteIntRes_SimpleIntBinOp(SDNode *N); 272 SDValue PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N); 273 SDValue PromoteIntRes_SRA(SDNode *N); 274 SDValue PromoteIntRes_SRL(SDNode *N); 275 SDValue PromoteIntRes_TRUNCATE(SDNode *N); 276 SDValue PromoteIntRes_UADDSUBO(SDNode *N, unsigned ResNo); 277 SDValue PromoteIntRes_UDIV(SDNode *N); 278 SDValue PromoteIntRes_UNDEF(SDNode *N); 279 SDValue PromoteIntRes_VAARG(SDNode *N); 280 SDValue PromoteIntRes_XMULO(SDNode *N, unsigned ResNo); 281 282 // Integer Operand Promotion. 283 bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo); 284 SDValue PromoteIntOp_ANY_EXTEND(SDNode *N); 285 SDValue PromoteIntOp_BITCAST(SDNode *N); 286 SDValue PromoteIntOp_BUILD_PAIR(SDNode *N); 287 SDValue PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo); 288 SDValue PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo); 289 SDValue PromoteIntOp_BUILD_VECTOR(SDNode *N); 290 SDValue PromoteIntOp_CONVERT_RNDSAT(SDNode *N); 291 SDValue PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo); 292 SDValue PromoteIntOp_MEMBARRIER(SDNode *N); 293 SDValue PromoteIntOp_SCALAR_TO_VECTOR(SDNode *N); 294 SDValue PromoteIntOp_SELECT(SDNode *N, unsigned OpNo); 295 SDValue PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo); 296 SDValue PromoteIntOp_SETCC(SDNode *N, unsigned OpNo); 297 SDValue PromoteIntOp_Shift(SDNode *N); 298 SDValue PromoteIntOp_SIGN_EXTEND(SDNode *N); 299 SDValue PromoteIntOp_SINT_TO_FP(SDNode *N); 300 SDValue PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo); 301 SDValue PromoteIntOp_TRUNCATE(SDNode *N); 302 SDValue PromoteIntOp_UINT_TO_FP(SDNode *N); 303 SDValue PromoteIntOp_ZERO_EXTEND(SDNode *N); 304 305 void PromoteSetCCOperands(SDValue &LHS,SDValue &RHS, ISD::CondCode Code); 306 307 //===--------------------------------------------------------------------===// 308 // Integer Expansion Support: LegalizeIntegerTypes.cpp 309 //===--------------------------------------------------------------------===// 310 311 /// GetExpandedInteger - Given a processed operand Op which was expanded into 312 /// two integers of half the size, this returns the two halves. The low bits 313 /// of Op are exactly equal to the bits of Lo; the high bits exactly equal Hi. 314 /// For example, if Op is an i64 which was expanded into two i32's, then this 315 /// method returns the two i32's, with Lo being equal to the lower 32 bits of 316 /// Op, and Hi being equal to the upper 32 bits. 317 void GetExpandedInteger(SDValue Op, SDValue &Lo, SDValue &Hi); 318 void SetExpandedInteger(SDValue Op, SDValue Lo, SDValue Hi); 319 320 // Integer Result Expansion. 321 void ExpandIntegerResult(SDNode *N, unsigned ResNo); 322 void ExpandIntRes_ANY_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi); 323 void ExpandIntRes_AssertSext (SDNode *N, SDValue &Lo, SDValue &Hi); 324 void ExpandIntRes_AssertZext (SDNode *N, SDValue &Lo, SDValue &Hi); 325 void ExpandIntRes_Constant (SDNode *N, SDValue &Lo, SDValue &Hi); 326 void ExpandIntRes_CTLZ (SDNode *N, SDValue &Lo, SDValue &Hi); 327 void ExpandIntRes_CTPOP (SDNode *N, SDValue &Lo, SDValue &Hi); 328 void ExpandIntRes_CTTZ (SDNode *N, SDValue &Lo, SDValue &Hi); 329 void ExpandIntRes_LOAD (LoadSDNode *N, SDValue &Lo, SDValue &Hi); 330 void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi); 331 void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDValue &Lo, SDValue &Hi); 332 void ExpandIntRes_TRUNCATE (SDNode *N, SDValue &Lo, SDValue &Hi); 333 void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi); 334 void ExpandIntRes_FP_TO_SINT (SDNode *N, SDValue &Lo, SDValue &Hi); 335 void ExpandIntRes_FP_TO_UINT (SDNode *N, SDValue &Lo, SDValue &Hi); 336 337 void ExpandIntRes_Logical (SDNode *N, SDValue &Lo, SDValue &Hi); 338 void ExpandIntRes_ADDSUB (SDNode *N, SDValue &Lo, SDValue &Hi); 339 void ExpandIntRes_ADDSUBC (SDNode *N, SDValue &Lo, SDValue &Hi); 340 void ExpandIntRes_ADDSUBE (SDNode *N, SDValue &Lo, SDValue &Hi); 341 void ExpandIntRes_BSWAP (SDNode *N, SDValue &Lo, SDValue &Hi); 342 void ExpandIntRes_MUL (SDNode *N, SDValue &Lo, SDValue &Hi); 343 void ExpandIntRes_SDIV (SDNode *N, SDValue &Lo, SDValue &Hi); 344 void ExpandIntRes_SREM (SDNode *N, SDValue &Lo, SDValue &Hi); 345 void ExpandIntRes_UDIV (SDNode *N, SDValue &Lo, SDValue &Hi); 346 void ExpandIntRes_UREM (SDNode *N, SDValue &Lo, SDValue &Hi); 347 void ExpandIntRes_Shift (SDNode *N, SDValue &Lo, SDValue &Hi); 348 349 void ExpandIntRes_SADDSUBO (SDNode *N, SDValue &Lo, SDValue &Hi); 350 void ExpandIntRes_UADDSUBO (SDNode *N, SDValue &Lo, SDValue &Hi); 351 352 void ExpandShiftByConstant(SDNode *N, unsigned Amt, 353 SDValue &Lo, SDValue &Hi); 354 bool ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi); 355 bool ExpandShiftWithUnknownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi); 356 357 // Integer Operand Expansion. 358 bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo); 359 SDValue ExpandIntOp_BITCAST(SDNode *N); 360 SDValue ExpandIntOp_BR_CC(SDNode *N); 361 SDValue ExpandIntOp_BUILD_VECTOR(SDNode *N); 362 SDValue ExpandIntOp_EXTRACT_ELEMENT(SDNode *N); 363 SDValue ExpandIntOp_SELECT_CC(SDNode *N); 364 SDValue ExpandIntOp_SETCC(SDNode *N); 365 SDValue ExpandIntOp_Shift(SDNode *N); 366 SDValue ExpandIntOp_SINT_TO_FP(SDNode *N); 367 SDValue ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo); 368 SDValue ExpandIntOp_TRUNCATE(SDNode *N); 369 SDValue ExpandIntOp_UINT_TO_FP(SDNode *N); 370 SDValue ExpandIntOp_RETURNADDR(SDNode *N); 371 372 void IntegerExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS, 373 ISD::CondCode &CCCode, DebugLoc dl); 374 375 //===--------------------------------------------------------------------===// 376 // Float to Integer Conversion Support: LegalizeFloatTypes.cpp 377 //===--------------------------------------------------------------------===// 378 379 /// GetSoftenedFloat - Given a processed operand Op which was converted to an 380 /// integer of the same size, this returns the integer. The integer contains 381 /// exactly the same bits as Op - only the type changed. For example, if Op 382 /// is an f32 which was softened to an i32, then this method returns an i32, 383 /// the bits of which coincide with those of Op. 384 SDValue GetSoftenedFloat(SDValue Op) { 385 SDValue &SoftenedOp = SoftenedFloats[Op]; 386 RemapValue(SoftenedOp); 387 assert(SoftenedOp.getNode() && "Operand wasn't converted to integer?"); 388 return SoftenedOp; 389 } 390 void SetSoftenedFloat(SDValue Op, SDValue Result); 391 392 // Result Float to Integer Conversion. 393 void SoftenFloatResult(SDNode *N, unsigned OpNo); 394 SDValue SoftenFloatRes_BITCAST(SDNode *N); 395 SDValue SoftenFloatRes_BUILD_PAIR(SDNode *N); 396 SDValue SoftenFloatRes_ConstantFP(ConstantFPSDNode *N); 397 SDValue SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N); 398 SDValue SoftenFloatRes_FABS(SDNode *N); 399 SDValue SoftenFloatRes_FADD(SDNode *N); 400 SDValue SoftenFloatRes_FCEIL(SDNode *N); 401 SDValue SoftenFloatRes_FCOPYSIGN(SDNode *N); 402 SDValue SoftenFloatRes_FCOS(SDNode *N); 403 SDValue SoftenFloatRes_FDIV(SDNode *N); 404 SDValue SoftenFloatRes_FEXP(SDNode *N); 405 SDValue SoftenFloatRes_FEXP2(SDNode *N); 406 SDValue SoftenFloatRes_FFLOOR(SDNode *N); 407 SDValue SoftenFloatRes_FLOG(SDNode *N); 408 SDValue SoftenFloatRes_FLOG2(SDNode *N); 409 SDValue SoftenFloatRes_FLOG10(SDNode *N); 410 SDValue SoftenFloatRes_FMUL(SDNode *N); 411 SDValue SoftenFloatRes_FNEARBYINT(SDNode *N); 412 SDValue SoftenFloatRes_FNEG(SDNode *N); 413 SDValue SoftenFloatRes_FP_EXTEND(SDNode *N); 414 SDValue SoftenFloatRes_FP16_TO_FP32(SDNode *N); 415 SDValue SoftenFloatRes_FP_ROUND(SDNode *N); 416 SDValue SoftenFloatRes_FPOW(SDNode *N); 417 SDValue SoftenFloatRes_FPOWI(SDNode *N); 418 SDValue SoftenFloatRes_FREM(SDNode *N); 419 SDValue SoftenFloatRes_FRINT(SDNode *N); 420 SDValue SoftenFloatRes_FSIN(SDNode *N); 421 SDValue SoftenFloatRes_FSQRT(SDNode *N); 422 SDValue SoftenFloatRes_FSUB(SDNode *N); 423 SDValue SoftenFloatRes_FTRUNC(SDNode *N); 424 SDValue SoftenFloatRes_LOAD(SDNode *N); 425 SDValue SoftenFloatRes_SELECT(SDNode *N); 426 SDValue SoftenFloatRes_SELECT_CC(SDNode *N); 427 SDValue SoftenFloatRes_UNDEF(SDNode *N); 428 SDValue SoftenFloatRes_VAARG(SDNode *N); 429 SDValue SoftenFloatRes_XINT_TO_FP(SDNode *N); 430 431 // Operand Float to Integer Conversion. 432 bool SoftenFloatOperand(SDNode *N, unsigned OpNo); 433 SDValue SoftenFloatOp_BITCAST(SDNode *N); 434 SDValue SoftenFloatOp_BR_CC(SDNode *N); 435 SDValue SoftenFloatOp_FP_ROUND(SDNode *N); 436 SDValue SoftenFloatOp_FP_TO_SINT(SDNode *N); 437 SDValue SoftenFloatOp_FP_TO_UINT(SDNode *N); 438 SDValue SoftenFloatOp_FP32_TO_FP16(SDNode *N); 439 SDValue SoftenFloatOp_SELECT_CC(SDNode *N); 440 SDValue SoftenFloatOp_SETCC(SDNode *N); 441 SDValue SoftenFloatOp_STORE(SDNode *N, unsigned OpNo); 442 443 void SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS, 444 ISD::CondCode &CCCode, DebugLoc dl); 445 446 //===--------------------------------------------------------------------===// 447 // Float Expansion Support: LegalizeFloatTypes.cpp 448 //===--------------------------------------------------------------------===// 449 450 /// GetExpandedFloat - Given a processed operand Op which was expanded into 451 /// two floating point values of half the size, this returns the two halves. 452 /// The low bits of Op are exactly equal to the bits of Lo; the high bits 453 /// exactly equal Hi. For example, if Op is a ppcf128 which was expanded 454 /// into two f64's, then this method returns the two f64's, with Lo being 455 /// equal to the lower 64 bits of Op, and Hi to the upper 64 bits. 456 void GetExpandedFloat(SDValue Op, SDValue &Lo, SDValue &Hi); 457 void SetExpandedFloat(SDValue Op, SDValue Lo, SDValue Hi); 458 459 // Float Result Expansion. 460 void ExpandFloatResult(SDNode *N, unsigned ResNo); 461 void ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo, SDValue &Hi); 462 void ExpandFloatRes_FABS (SDNode *N, SDValue &Lo, SDValue &Hi); 463 void ExpandFloatRes_FADD (SDNode *N, SDValue &Lo, SDValue &Hi); 464 void ExpandFloatRes_FCEIL (SDNode *N, SDValue &Lo, SDValue &Hi); 465 void ExpandFloatRes_FCOPYSIGN (SDNode *N, SDValue &Lo, SDValue &Hi); 466 void ExpandFloatRes_FCOS (SDNode *N, SDValue &Lo, SDValue &Hi); 467 void ExpandFloatRes_FDIV (SDNode *N, SDValue &Lo, SDValue &Hi); 468 void ExpandFloatRes_FEXP (SDNode *N, SDValue &Lo, SDValue &Hi); 469 void ExpandFloatRes_FEXP2 (SDNode *N, SDValue &Lo, SDValue &Hi); 470 void ExpandFloatRes_FFLOOR (SDNode *N, SDValue &Lo, SDValue &Hi); 471 void ExpandFloatRes_FLOG (SDNode *N, SDValue &Lo, SDValue &Hi); 472 void ExpandFloatRes_FLOG2 (SDNode *N, SDValue &Lo, SDValue &Hi); 473 void ExpandFloatRes_FLOG10 (SDNode *N, SDValue &Lo, SDValue &Hi); 474 void ExpandFloatRes_FMUL (SDNode *N, SDValue &Lo, SDValue &Hi); 475 void ExpandFloatRes_FNEARBYINT(SDNode *N, SDValue &Lo, SDValue &Hi); 476 void ExpandFloatRes_FNEG (SDNode *N, SDValue &Lo, SDValue &Hi); 477 void ExpandFloatRes_FP_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi); 478 void ExpandFloatRes_FPOW (SDNode *N, SDValue &Lo, SDValue &Hi); 479 void ExpandFloatRes_FPOWI (SDNode *N, SDValue &Lo, SDValue &Hi); 480 void ExpandFloatRes_FRINT (SDNode *N, SDValue &Lo, SDValue &Hi); 481 void ExpandFloatRes_FSIN (SDNode *N, SDValue &Lo, SDValue &Hi); 482 void ExpandFloatRes_FSQRT (SDNode *N, SDValue &Lo, SDValue &Hi); 483 void ExpandFloatRes_FSUB (SDNode *N, SDValue &Lo, SDValue &Hi); 484 void ExpandFloatRes_FTRUNC (SDNode *N, SDValue &Lo, SDValue &Hi); 485 void ExpandFloatRes_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi); 486 void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo, SDValue &Hi); 487 488 // Float Operand Expansion. 489 bool ExpandFloatOperand(SDNode *N, unsigned OperandNo); 490 SDValue ExpandFloatOp_BR_CC(SDNode *N); 491 SDValue ExpandFloatOp_FP_ROUND(SDNode *N); 492 SDValue ExpandFloatOp_FP_TO_SINT(SDNode *N); 493 SDValue ExpandFloatOp_FP_TO_UINT(SDNode *N); 494 SDValue ExpandFloatOp_SELECT_CC(SDNode *N); 495 SDValue ExpandFloatOp_SETCC(SDNode *N); 496 SDValue ExpandFloatOp_STORE(SDNode *N, unsigned OpNo); 497 498 void FloatExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS, 499 ISD::CondCode &CCCode, DebugLoc dl); 500 501 //===--------------------------------------------------------------------===// 502 // Scalarization Support: LegalizeVectorTypes.cpp 503 //===--------------------------------------------------------------------===// 504 505 /// GetScalarizedVector - Given a processed one-element vector Op which was 506 /// scalarized to its element type, this returns the element. For example, 507 /// if Op is a v1i32, Op = < i32 val >, this method returns val, an i32. 508 SDValue GetScalarizedVector(SDValue Op) { 509 SDValue &ScalarizedOp = ScalarizedVectors[Op]; 510 RemapValue(ScalarizedOp); 511 assert(ScalarizedOp.getNode() && "Operand wasn't scalarized?"); 512 return ScalarizedOp; 513 } 514 void SetScalarizedVector(SDValue Op, SDValue Result); 515 516 // Vector Result Scalarization: <1 x ty> -> ty. 517 void ScalarizeVectorResult(SDNode *N, unsigned OpNo); 518 SDValue ScalarizeVecRes_BinOp(SDNode *N); 519 SDValue ScalarizeVecRes_UnaryOp(SDNode *N); 520 SDValue ScalarizeVecRes_InregOp(SDNode *N); 521 522 SDValue ScalarizeVecRes_BITCAST(SDNode *N); 523 SDValue ScalarizeVecRes_CONVERT_RNDSAT(SDNode *N); 524 SDValue ScalarizeVecRes_EXTRACT_SUBVECTOR(SDNode *N); 525 SDValue ScalarizeVecRes_FP_ROUND(SDNode *N); 526 SDValue ScalarizeVecRes_FPOWI(SDNode *N); 527 SDValue ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N); 528 SDValue ScalarizeVecRes_LOAD(LoadSDNode *N); 529 SDValue ScalarizeVecRes_SCALAR_TO_VECTOR(SDNode *N); 530 SDValue ScalarizeVecRes_SIGN_EXTEND_INREG(SDNode *N); 531 SDValue ScalarizeVecRes_SELECT(SDNode *N); 532 SDValue ScalarizeVecRes_SELECT_CC(SDNode *N); 533 SDValue ScalarizeVecRes_SETCC(SDNode *N); 534 SDValue ScalarizeVecRes_UNDEF(SDNode *N); 535 SDValue ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N); 536 SDValue ScalarizeVecRes_VSETCC(SDNode *N); 537 538 // Vector Operand Scalarization: <1 x ty> -> ty. 539 bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo); 540 SDValue ScalarizeVecOp_BITCAST(SDNode *N); 541 SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N); 542 SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N); 543 SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo); 544 545 //===--------------------------------------------------------------------===// 546 // Vector Splitting Support: LegalizeVectorTypes.cpp 547 //===--------------------------------------------------------------------===// 548 549 /// GetSplitVector - Given a processed vector Op which was split into vectors 550 /// of half the size, this method returns the halves. The first elements of 551 /// Op coincide with the elements of Lo; the remaining elements of Op coincide 552 /// with the elements of Hi: Op is what you would get by concatenating Lo and 553 /// Hi. For example, if Op is a v8i32 that was split into two v4i32's, then 554 /// this method returns the two v4i32's, with Lo corresponding to the first 4 555 /// elements of Op, and Hi to the last 4 elements. 556 void GetSplitVector(SDValue Op, SDValue &Lo, SDValue &Hi); 557 void SetSplitVector(SDValue Op, SDValue Lo, SDValue Hi); 558 559 // Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>. 560 void SplitVectorResult(SDNode *N, unsigned OpNo); 561 void SplitVecRes_BinOp(SDNode *N, SDValue &Lo, SDValue &Hi); 562 void SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo, SDValue &Hi); 563 void SplitVecRes_InregOp(SDNode *N, SDValue &Lo, SDValue &Hi); 564 565 void SplitVecRes_BITCAST(SDNode *N, SDValue &Lo, SDValue &Hi); 566 void SplitVecRes_BUILD_PAIR(SDNode *N, SDValue &Lo, SDValue &Hi); 567 void SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi); 568 void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo, SDValue &Hi); 569 void SplitVecRes_EXTRACT_SUBVECTOR(SDNode *N, SDValue &Lo, SDValue &Hi); 570 void SplitVecRes_FPOWI(SDNode *N, SDValue &Lo, SDValue &Hi); 571 void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi); 572 void SplitVecRes_LOAD(LoadSDNode *N, SDValue &Lo, SDValue &Hi); 573 void SplitVecRes_SCALAR_TO_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi); 574 void SplitVecRes_SIGN_EXTEND_INREG(SDNode *N, SDValue &Lo, SDValue &Hi); 575 void SplitVecRes_SETCC(SDNode *N, SDValue &Lo, SDValue &Hi); 576 void SplitVecRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi); 577 void SplitVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N, SDValue &Lo, 578 SDValue &Hi); 579 580 // Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>. 581 bool SplitVectorOperand(SDNode *N, unsigned OpNo); 582 SDValue SplitVecOp_UnaryOp(SDNode *N); 583 584 SDValue SplitVecOp_BITCAST(SDNode *N); 585 SDValue SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N); 586 SDValue SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N); 587 SDValue SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo); 588 SDValue SplitVecOp_CONCAT_VECTORS(SDNode *N); 589 SDValue SplitVecOp_FP_ROUND(SDNode *N); 590 591 //===--------------------------------------------------------------------===// 592 // Vector Widening Support: LegalizeVectorTypes.cpp 593 //===--------------------------------------------------------------------===// 594 595 /// GetWidenedVector - Given a processed vector Op which was widened into a 596 /// larger vector, this method returns the larger vector. The elements of 597 /// the returned vector consist of the elements of Op followed by elements 598 /// containing rubbish. For example, if Op is a v2i32 that was widened to a 599 /// v4i32, then this method returns a v4i32 for which the first two elements 600 /// are the same as those of Op, while the last two elements contain rubbish. 601 SDValue GetWidenedVector(SDValue Op) { 602 SDValue &WidenedOp = WidenedVectors[Op]; 603 RemapValue(WidenedOp); 604 assert(WidenedOp.getNode() && "Operand wasn't widened?"); 605 return WidenedOp; 606 } 607 void SetWidenedVector(SDValue Op, SDValue Result); 608 609 // Widen Vector Result Promotion. 610 void WidenVectorResult(SDNode *N, unsigned ResNo); 611 SDValue WidenVecRes_BITCAST(SDNode* N); 612 SDValue WidenVecRes_BUILD_VECTOR(SDNode* N); 613 SDValue WidenVecRes_CONCAT_VECTORS(SDNode* N); 614 SDValue WidenVecRes_CONVERT_RNDSAT(SDNode* N); 615 SDValue WidenVecRes_EXTRACT_SUBVECTOR(SDNode* N); 616 SDValue WidenVecRes_INSERT_VECTOR_ELT(SDNode* N); 617 SDValue WidenVecRes_LOAD(SDNode* N); 618 SDValue WidenVecRes_SCALAR_TO_VECTOR(SDNode* N); 619 SDValue WidenVecRes_SIGN_EXTEND_INREG(SDNode* N); 620 SDValue WidenVecRes_SELECT(SDNode* N); 621 SDValue WidenVecRes_SELECT_CC(SDNode* N); 622 SDValue WidenVecRes_SETCC(SDNode* N); 623 SDValue WidenVecRes_UNDEF(SDNode *N); 624 SDValue WidenVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N); 625 SDValue WidenVecRes_VSETCC(SDNode* N); 626 627 SDValue WidenVecRes_Binary(SDNode *N); 628 SDValue WidenVecRes_Convert(SDNode *N); 629 SDValue WidenVecRes_POWI(SDNode *N); 630 SDValue WidenVecRes_Shift(SDNode *N); 631 SDValue WidenVecRes_Unary(SDNode *N); 632 SDValue WidenVecRes_InregOp(SDNode *N); 633 634 // Widen Vector Operand. 635 bool WidenVectorOperand(SDNode *N, unsigned ResNo); 636 SDValue WidenVecOp_BITCAST(SDNode *N); 637 SDValue WidenVecOp_CONCAT_VECTORS(SDNode *N); 638 SDValue WidenVecOp_EXTRACT_VECTOR_ELT(SDNode *N); 639 SDValue WidenVecOp_EXTRACT_SUBVECTOR(SDNode *N); 640 SDValue WidenVecOp_STORE(SDNode* N); 641 642 SDValue WidenVecOp_Convert(SDNode *N); 643 644 //===--------------------------------------------------------------------===// 645 // Vector Widening Utilities Support: LegalizeVectorTypes.cpp 646 //===--------------------------------------------------------------------===// 647 648 /// Helper GenWidenVectorLoads - Helper function to generate a set of 649 /// loads to load a vector with a resulting wider type. It takes 650 /// LdChain: list of chains for the load to be generated. 651 /// Ld: load to widen 652 SDValue GenWidenVectorLoads(SmallVector<SDValue, 16>& LdChain, 653 LoadSDNode *LD); 654 655 /// GenWidenVectorExtLoads - Helper function to generate a set of extension 656 /// loads to load a ector with a resulting wider type. It takes 657 /// LdChain: list of chains for the load to be generated. 658 /// Ld: load to widen 659 /// ExtType: extension element type 660 SDValue GenWidenVectorExtLoads(SmallVector<SDValue, 16>& LdChain, 661 LoadSDNode *LD, ISD::LoadExtType ExtType); 662 663 /// Helper genWidenVectorStores - Helper function to generate a set of 664 /// stores to store a widen vector into non widen memory 665 /// StChain: list of chains for the stores we have generated 666 /// ST: store of a widen value 667 void GenWidenVectorStores(SmallVector<SDValue, 16>& StChain, StoreSDNode *ST); 668 669 /// Helper genWidenVectorTruncStores - Helper function to generate a set of 670 /// stores to store a truncate widen vector into non widen memory 671 /// StChain: list of chains for the stores we have generated 672 /// ST: store of a widen value 673 void GenWidenVectorTruncStores(SmallVector<SDValue, 16>& StChain, 674 StoreSDNode *ST); 675 676 /// Modifies a vector input (widen or narrows) to a vector of NVT. The 677 /// input vector must have the same element type as NVT. 678 SDValue ModifyToType(SDValue InOp, EVT WidenVT); 679 680 681 //===--------------------------------------------------------------------===// 682 // Generic Splitting: LegalizeTypesGeneric.cpp 683 //===--------------------------------------------------------------------===// 684 685 // Legalization methods which only use that the illegal type is split into two 686 // not necessarily identical types. As such they can be used for splitting 687 // vectors and expanding integers and floats. 688 689 void GetSplitOp(SDValue Op, SDValue &Lo, SDValue &Hi) { 690 if (Op.getValueType().isVector()) 691 GetSplitVector(Op, Lo, Hi); 692 else if (Op.getValueType().isInteger()) 693 GetExpandedInteger(Op, Lo, Hi); 694 else 695 GetExpandedFloat(Op, Lo, Hi); 696 } 697 698 /// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type 699 /// which is split (or expanded) into two not necessarily identical pieces. 700 void GetSplitDestVTs(EVT InVT, EVT &LoVT, EVT &HiVT); 701 702 /// GetPairElements - Use ISD::EXTRACT_ELEMENT nodes to extract the low and 703 /// high parts of the given value. 704 void GetPairElements(SDValue Pair, SDValue &Lo, SDValue &Hi); 705 706 // Generic Result Splitting. 707 void SplitRes_MERGE_VALUES(SDNode *N, SDValue &Lo, SDValue &Hi); 708 void SplitRes_SELECT (SDNode *N, SDValue &Lo, SDValue &Hi); 709 void SplitRes_SELECT_CC (SDNode *N, SDValue &Lo, SDValue &Hi); 710 void SplitRes_UNDEF (SDNode *N, SDValue &Lo, SDValue &Hi); 711 712 //===--------------------------------------------------------------------===// 713 // Generic Expansion: LegalizeTypesGeneric.cpp 714 //===--------------------------------------------------------------------===// 715 716 // Legalization methods which only use that the illegal type is split into two 717 // identical types of half the size, and that the Lo/Hi part is stored first 718 // in memory on little/big-endian machines, followed by the Hi/Lo part. As 719 // such they can be used for expanding integers and floats. 720 721 void GetExpandedOp(SDValue Op, SDValue &Lo, SDValue &Hi) { 722 if (Op.getValueType().isInteger()) 723 GetExpandedInteger(Op, Lo, Hi); 724 else 725 GetExpandedFloat(Op, Lo, Hi); 726 } 727 728 // Generic Result Expansion. 729 void ExpandRes_BITCAST (SDNode *N, SDValue &Lo, SDValue &Hi); 730 void ExpandRes_BUILD_PAIR (SDNode *N, SDValue &Lo, SDValue &Hi); 731 void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDValue &Lo, SDValue &Hi); 732 void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi); 733 void ExpandRes_NormalLoad (SDNode *N, SDValue &Lo, SDValue &Hi); 734 void ExpandRes_VAARG (SDNode *N, SDValue &Lo, SDValue &Hi); 735 736 // Generic Operand Expansion. 737 SDValue ExpandOp_BITCAST (SDNode *N); 738 SDValue ExpandOp_BUILD_VECTOR (SDNode *N); 739 SDValue ExpandOp_EXTRACT_ELEMENT (SDNode *N); 740 SDValue ExpandOp_INSERT_VECTOR_ELT(SDNode *N); 741 SDValue ExpandOp_SCALAR_TO_VECTOR (SDNode *N); 742 SDValue ExpandOp_NormalStore (SDNode *N, unsigned OpNo); 743}; 744 745} // end namespace llvm. 746 747#endif 748