1 //===-- LegalizeTypes.h - Definition of the DAG Type Legalizer class ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the DAGTypeLegalizer class. This is a private interface
11 // shared between the code that implements the SelectionDAG::LegalizeTypes
14 //===----------------------------------------------------------------------===//
16 #ifndef SELECTIONDAG_LEGALIZETYPES_H
17 #define SELECTIONDAG_LEGALIZETYPES_H
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/Support/Compiler.h"
24 #include "llvm/Support/Debug.h"
28 //===----------------------------------------------------------------------===//
29 /// DAGTypeLegalizer - This takes an arbitrary SelectionDAG as input and hacks
30 /// on it until only value types the target machine can handle are left. This
31 /// involves promoting small sizes to large sizes or splitting up large values
32 /// into small values.
34 class VISIBILITY_HIDDEN DAGTypeLegalizer {
38 // NodeIDFlags - This pass uses the NodeID on the SDNodes to hold information
39 // about the state of the node. The enum has all the values.
41 /// ReadyToProcess - All operands have been processed, so this node is ready
45 /// NewNode - This is a new node that was created in the process of
46 /// legalizing some other node.
49 /// Processed - This is a node that has already been processed.
52 // 1+ - This is a node which has this many unlegalized operands.
56 Legal, // The target natively supports this type.
57 PromoteInteger, // Replace this integer type with a larger one.
58 ExpandInteger, // Split this integer type into two of half the size.
59 SoftenFloat, // Convert this float type to a same size integer type.
60 ExpandFloat, // Split this float type into two of half the size.
61 ScalarizeVector, // Replace this one-element vector with its element type.
62 SplitVector // This vector type should be split into smaller vectors.
65 /// ValueTypeActions - This is a bitvector that contains two bits for each
66 /// simple value type, where the two bits correspond to the LegalizeAction
67 /// enum from TargetLowering. This can be queried with "getTypeAction(VT)".
68 TargetLowering::ValueTypeActionImpl ValueTypeActions;
70 /// getTypeAction - Return how we should legalize values of this type, either
71 /// it is already legal, or we need to promote it to a larger integer type, or
72 /// we need to expand it into multiple registers of a smaller integer type, or
73 /// we need to split a vector type into smaller vector types, or we need to
74 /// convert it to a different type of the same size.
75 LegalizeAction getTypeAction(MVT VT) const {
76 switch (ValueTypeActions.getTypeAction(VT)) {
78 assert(false && "Unknown legalize action!");
79 case TargetLowering::Legal:
81 case TargetLowering::Promote:
82 return PromoteInteger;
83 case TargetLowering::Expand:
85 // 1) split scalar in half, 2) convert a float to an integer,
86 // 3) scalarize a single-element vector, 4) split a vector in two.
90 else if (VT.getSizeInBits() ==
91 TLI.getTypeToTransformTo(VT).getSizeInBits())
95 } else if (VT.getVectorNumElements() == 1) {
96 return ScalarizeVector;
103 /// isTypeLegal - Return true if this type is legal on this target.
104 bool isTypeLegal(MVT VT) const {
105 return ValueTypeActions.getTypeAction(VT) == TargetLowering::Legal;
108 /// IgnoreNodeResults - Pretend all of this node's results are legal.
109 bool IgnoreNodeResults(SDNode *N) const {
110 return N->getOpcode() == ISD::TargetConstant;
113 /// PromotedIntegers - For integer nodes that are below legal width, this map
114 /// indicates what promoted value to use.
115 DenseMap<SDValue, SDValue> PromotedIntegers;
117 /// ExpandedIntegers - For integer nodes that need to be expanded this map
118 /// indicates which operands are the expanded version of the input.
119 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedIntegers;
121 /// SoftenedFloats - For floating point nodes converted to integers of
122 /// the same size, this map indicates the converted value to use.
123 DenseMap<SDValue, SDValue> SoftenedFloats;
125 /// ExpandedFloats - For float nodes that need to be expanded this map
126 /// indicates which operands are the expanded version of the input.
127 DenseMap<SDValue, std::pair<SDValue, SDValue> > ExpandedFloats;
129 /// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the
130 /// scalar value of type 'ty' to use.
131 DenseMap<SDValue, SDValue> ScalarizedVectors;
133 /// SplitVectors - For nodes that need to be split this map indicates
134 /// which operands are the expanded version of the input.
135 DenseMap<SDValue, std::pair<SDValue, SDValue> > SplitVectors;
137 /// ReplacedNodes - For nodes that have been replaced with another,
138 /// indicates the replacement node to use.
139 DenseMap<SDValue, SDValue> ReplacedNodes;
141 /// Worklist - This defines a worklist of nodes to process. In order to be
142 /// pushed onto this worklist, all operands of a node must have already been
144 SmallVector<SDNode*, 128> Worklist;
147 explicit DAGTypeLegalizer(SelectionDAG &dag)
148 : TLI(dag.getTargetLoweringInfo()), DAG(dag),
149 ValueTypeActions(TLI.getValueTypeActions()) {
150 assert(MVT::LAST_VALUETYPE <= 32 &&
151 "Too many value types for ValueTypeActions to hold!");
156 /// ReanalyzeNode - Recompute the NodeID and correct processed operands
157 /// for the specified node, adding it to the worklist if ready.
158 SDNode *ReanalyzeNode(SDNode *N) {
159 N->setNodeId(NewNode);
160 return AnalyzeNewNode(N);
163 void NoteDeletion(SDNode *Old, SDNode *New) {
166 for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
167 ReplacedNodes[SDValue(Old, i)] = SDValue(New, i);
171 void AnalyzeNewNode(SDValue &Val);
172 SDNode *AnalyzeNewNode(SDNode *N);
174 void ReplaceValueWith(SDValue From, SDValue To);
175 void ReplaceNodeWith(SDNode *From, SDNode *To);
177 void RemapNode(SDValue &N);
178 void ExpungeNode(SDNode *N);
181 SDValue CreateStackStoreLoad(SDValue Op, MVT DestVT);
182 SDValue MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
183 const SDValue *Ops, unsigned NumOps, bool isSigned);
185 SDValue BitConvertToInteger(SDValue Op);
186 SDValue JoinIntegers(SDValue Lo, SDValue Hi);
187 void SplitInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
188 void SplitInteger(SDValue Op, MVT LoVT, MVT HiVT,
189 SDValue &Lo, SDValue &Hi);
191 SDValue GetVectorElementPointer(SDValue VecPtr, MVT EltVT, SDValue Index);
193 //===--------------------------------------------------------------------===//
194 // Integer Promotion Support: LegalizeIntegerTypes.cpp
195 //===--------------------------------------------------------------------===//
197 SDValue GetPromotedInteger(SDValue Op) {
198 SDValue &PromotedOp = PromotedIntegers[Op];
199 RemapNode(PromotedOp);
200 assert(PromotedOp.getNode() && "Operand wasn't promoted?");
203 void SetPromotedInteger(SDValue Op, SDValue Result);
205 /// ZExtPromotedInteger - Get a promoted operand and zero extend it to the
207 SDValue ZExtPromotedInteger(SDValue Op) {
208 MVT OldVT = Op.getValueType();
209 Op = GetPromotedInteger(Op);
210 return DAG.getZeroExtendInReg(Op, OldVT);
213 // Integer Result Promotion.
214 void PromoteIntegerResult(SDNode *N, unsigned ResNo);
215 SDValue PromoteIntRes_AssertSext(SDNode *N);
216 SDValue PromoteIntRes_AssertZext(SDNode *N);
217 SDValue PromoteIntRes_Atomic1(AtomicSDNode *N);
218 SDValue PromoteIntRes_Atomic2(AtomicSDNode *N);
219 SDValue PromoteIntRes_BIT_CONVERT(SDNode *N);
220 SDValue PromoteIntRes_BSWAP(SDNode *N);
221 SDValue PromoteIntRes_BUILD_PAIR(SDNode *N);
222 SDValue PromoteIntRes_Constant(SDNode *N);
223 SDValue PromoteIntRes_CTLZ(SDNode *N);
224 SDValue PromoteIntRes_CTPOP(SDNode *N);
225 SDValue PromoteIntRes_CTTZ(SDNode *N);
226 SDValue PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N);
227 SDValue PromoteIntRes_FP_TO_XINT(SDNode *N);
228 SDValue PromoteIntRes_INT_EXTEND(SDNode *N);
229 SDValue PromoteIntRes_LOAD(LoadSDNode *N);
230 SDValue PromoteIntRes_SDIV(SDNode *N);
231 SDValue PromoteIntRes_SELECT (SDNode *N);
232 SDValue PromoteIntRes_SELECT_CC(SDNode *N);
233 SDValue PromoteIntRes_SETCC(SDNode *N);
234 SDValue PromoteIntRes_SHL(SDNode *N);
235 SDValue PromoteIntRes_SimpleIntBinOp(SDNode *N);
236 SDValue PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N);
237 SDValue PromoteIntRes_SRA(SDNode *N);
238 SDValue PromoteIntRes_SRL(SDNode *N);
239 SDValue PromoteIntRes_TRUNCATE(SDNode *N);
240 SDValue PromoteIntRes_UDIV(SDNode *N);
241 SDValue PromoteIntRes_UNDEF(SDNode *N);
242 SDValue PromoteIntRes_VAARG(SDNode *N);
244 // Integer Operand Promotion.
245 bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo);
246 SDValue PromoteIntOp_ANY_EXTEND(SDNode *N);
247 SDValue PromoteIntOp_BUILD_PAIR(SDNode *N);
248 SDValue PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo);
249 SDValue PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo);
250 SDValue PromoteIntOp_BUILD_VECTOR(SDNode *N);
251 SDValue PromoteIntOp_FP_EXTEND(SDNode *N);
252 SDValue PromoteIntOp_FP_ROUND(SDNode *N);
253 SDValue PromoteIntOp_INT_TO_FP(SDNode *N);
254 SDValue PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
255 SDValue PromoteIntOp_MEMBARRIER(SDNode *N);
256 SDValue PromoteIntOp_SELECT(SDNode *N, unsigned OpNo);
257 SDValue PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo);
258 SDValue PromoteIntOp_SETCC(SDNode *N, unsigned OpNo);
259 SDValue PromoteIntOp_SIGN_EXTEND(SDNode *N);
260 SDValue PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo);
261 SDValue PromoteIntOp_TRUNCATE(SDNode *N);
262 SDValue PromoteIntOp_ZERO_EXTEND(SDNode *N);
264 void PromoteSetCCOperands(SDValue &LHS,SDValue &RHS, ISD::CondCode Code);
266 //===--------------------------------------------------------------------===//
267 // Integer Expansion Support: LegalizeIntegerTypes.cpp
268 //===--------------------------------------------------------------------===//
270 void GetExpandedInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
271 void SetExpandedInteger(SDValue Op, SDValue Lo, SDValue Hi);
273 // Integer Result Expansion.
274 void ExpandIntegerResult(SDNode *N, unsigned ResNo);
275 void ExpandIntRes_ANY_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
276 void ExpandIntRes_AssertSext (SDNode *N, SDValue &Lo, SDValue &Hi);
277 void ExpandIntRes_AssertZext (SDNode *N, SDValue &Lo, SDValue &Hi);
278 void ExpandIntRes_Constant (SDNode *N, SDValue &Lo, SDValue &Hi);
279 void ExpandIntRes_CTLZ (SDNode *N, SDValue &Lo, SDValue &Hi);
280 void ExpandIntRes_CTPOP (SDNode *N, SDValue &Lo, SDValue &Hi);
281 void ExpandIntRes_CTTZ (SDNode *N, SDValue &Lo, SDValue &Hi);
282 void ExpandIntRes_LOAD (LoadSDNode *N, SDValue &Lo, SDValue &Hi);
283 void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
284 void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDValue &Lo, SDValue &Hi);
285 void ExpandIntRes_TRUNCATE (SDNode *N, SDValue &Lo, SDValue &Hi);
286 void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
287 void ExpandIntRes_FP_TO_SINT (SDNode *N, SDValue &Lo, SDValue &Hi);
288 void ExpandIntRes_FP_TO_UINT (SDNode *N, SDValue &Lo, SDValue &Hi);
290 void ExpandIntRes_Logical (SDNode *N, SDValue &Lo, SDValue &Hi);
291 void ExpandIntRes_ADDSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
292 void ExpandIntRes_ADDSUBC (SDNode *N, SDValue &Lo, SDValue &Hi);
293 void ExpandIntRes_ADDSUBE (SDNode *N, SDValue &Lo, SDValue &Hi);
294 void ExpandIntRes_BSWAP (SDNode *N, SDValue &Lo, SDValue &Hi);
295 void ExpandIntRes_MUL (SDNode *N, SDValue &Lo, SDValue &Hi);
296 void ExpandIntRes_SDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
297 void ExpandIntRes_SREM (SDNode *N, SDValue &Lo, SDValue &Hi);
298 void ExpandIntRes_UDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
299 void ExpandIntRes_UREM (SDNode *N, SDValue &Lo, SDValue &Hi);
300 void ExpandIntRes_Shift (SDNode *N, SDValue &Lo, SDValue &Hi);
302 void ExpandShiftByConstant(SDNode *N, unsigned Amt,
303 SDValue &Lo, SDValue &Hi);
304 bool ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi);
306 // Integer Operand Expansion.
307 bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo);
308 SDValue ExpandIntOp_BIT_CONVERT(SDNode *N);
309 SDValue ExpandIntOp_BR_CC(SDNode *N);
310 SDValue ExpandIntOp_BUILD_VECTOR(SDNode *N);
311 SDValue ExpandIntOp_EXTRACT_ELEMENT(SDNode *N);
312 SDValue ExpandIntOp_SELECT_CC(SDNode *N);
313 SDValue ExpandIntOp_SETCC(SDNode *N);
314 SDValue ExpandIntOp_SINT_TO_FP(SDNode *N);
315 SDValue ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo);
316 SDValue ExpandIntOp_TRUNCATE(SDNode *N);
317 SDValue ExpandIntOp_UINT_TO_FP(SDNode *N);
319 void IntegerExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
320 ISD::CondCode &CCCode);
322 //===--------------------------------------------------------------------===//
323 // Float to Integer Conversion Support: LegalizeFloatTypes.cpp
324 //===--------------------------------------------------------------------===//
326 SDValue GetSoftenedFloat(SDValue Op) {
327 SDValue &SoftenedOp = SoftenedFloats[Op];
328 RemapNode(SoftenedOp);
329 assert(SoftenedOp.getNode() && "Operand wasn't converted to integer?");
332 void SetSoftenedFloat(SDValue Op, SDValue Result);
334 // Result Float to Integer Conversion.
335 void SoftenFloatResult(SDNode *N, unsigned OpNo);
336 SDValue SoftenFloatRes_BIT_CONVERT(SDNode *N);
337 SDValue SoftenFloatRes_BUILD_PAIR(SDNode *N);
338 SDValue SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
339 SDValue SoftenFloatRes_FABS(SDNode *N);
340 SDValue SoftenFloatRes_FADD(SDNode *N);
341 SDValue SoftenFloatRes_FCOPYSIGN(SDNode *N);
342 SDValue SoftenFloatRes_FDIV(SDNode *N);
343 SDValue SoftenFloatRes_FMUL(SDNode *N);
344 SDValue SoftenFloatRes_FP_EXTEND(SDNode *N);
345 SDValue SoftenFloatRes_FP_ROUND(SDNode *N);
346 SDValue SoftenFloatRes_FPOWI(SDNode *N);
347 SDValue SoftenFloatRes_FSUB(SDNode *N);
348 SDValue SoftenFloatRes_LOAD(SDNode *N);
349 SDValue SoftenFloatRes_SELECT(SDNode *N);
350 SDValue SoftenFloatRes_SELECT_CC(SDNode *N);
351 SDValue SoftenFloatRes_SINT_TO_FP(SDNode *N);
352 SDValue SoftenFloatRes_UINT_TO_FP(SDNode *N);
354 // Operand Float to Integer Conversion.
355 bool SoftenFloatOperand(SDNode *N, unsigned OpNo);
356 SDValue SoftenFloatOp_BIT_CONVERT(SDNode *N);
357 SDValue SoftenFloatOp_BR_CC(SDNode *N);
358 SDValue SoftenFloatOp_FP_ROUND(SDNode *N);
359 SDValue SoftenFloatOp_FP_TO_SINT(SDNode *N);
360 SDValue SoftenFloatOp_FP_TO_UINT(SDNode *N);
361 SDValue SoftenFloatOp_SELECT_CC(SDNode *N);
362 SDValue SoftenFloatOp_SETCC(SDNode *N);
363 SDValue SoftenFloatOp_STORE(SDNode *N, unsigned OpNo);
365 void SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
366 ISD::CondCode &CCCode);
368 //===--------------------------------------------------------------------===//
369 // Float Expansion Support: LegalizeFloatTypes.cpp
370 //===--------------------------------------------------------------------===//
372 void GetExpandedFloat(SDValue Op, SDValue &Lo, SDValue &Hi);
373 void SetExpandedFloat(SDValue Op, SDValue Lo, SDValue Hi);
375 // Float Result Expansion.
376 void ExpandFloatResult(SDNode *N, unsigned ResNo);
377 void ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo, SDValue &Hi);
378 void ExpandFloatRes_FABS (SDNode *N, SDValue &Lo, SDValue &Hi);
379 void ExpandFloatRes_FADD (SDNode *N, SDValue &Lo, SDValue &Hi);
380 void ExpandFloatRes_FDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
381 void ExpandFloatRes_FMUL (SDNode *N, SDValue &Lo, SDValue &Hi);
382 void ExpandFloatRes_FNEG (SDNode *N, SDValue &Lo, SDValue &Hi);
383 void ExpandFloatRes_FP_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
384 void ExpandFloatRes_FSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
385 void ExpandFloatRes_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi);
386 void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo, SDValue &Hi);
388 // Float Operand Expansion.
389 bool ExpandFloatOperand(SDNode *N, unsigned OperandNo);
390 SDValue ExpandFloatOp_BR_CC(SDNode *N);
391 SDValue ExpandFloatOp_FP_ROUND(SDNode *N);
392 SDValue ExpandFloatOp_FP_TO_SINT(SDNode *N);
393 SDValue ExpandFloatOp_FP_TO_UINT(SDNode *N);
394 SDValue ExpandFloatOp_SELECT_CC(SDNode *N);
395 SDValue ExpandFloatOp_SETCC(SDNode *N);
396 SDValue ExpandFloatOp_STORE(SDNode *N, unsigned OpNo);
398 void FloatExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
399 ISD::CondCode &CCCode);
401 //===--------------------------------------------------------------------===//
402 // Scalarization Support: LegalizeVectorTypes.cpp
403 //===--------------------------------------------------------------------===//
405 SDValue GetScalarizedVector(SDValue Op) {
406 SDValue &ScalarizedOp = ScalarizedVectors[Op];
407 RemapNode(ScalarizedOp);
408 assert(ScalarizedOp.getNode() && "Operand wasn't scalarized?");
411 void SetScalarizedVector(SDValue Op, SDValue Result);
413 // Vector Result Scalarization: <1 x ty> -> ty.
414 void ScalarizeVectorResult(SDNode *N, unsigned OpNo);
415 SDValue ScalarizeVecRes_BinOp(SDNode *N);
416 SDValue ScalarizeVecRes_UnaryOp(SDNode *N);
418 SDValue ScalarizeVecRes_BIT_CONVERT(SDNode *N);
419 SDValue ScalarizeVecRes_FPOWI(SDNode *N);
420 SDValue ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N);
421 SDValue ScalarizeVecRes_LOAD(LoadSDNode *N);
422 SDValue ScalarizeVecRes_SELECT(SDNode *N);
423 SDValue ScalarizeVecRes_UNDEF(SDNode *N);
424 SDValue ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N);
425 SDValue ScalarizeVecRes_VSETCC(SDNode *N);
427 // Vector Operand Scalarization: <1 x ty> -> ty.
428 bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
429 SDValue ScalarizeVecOp_BIT_CONVERT(SDNode *N);
430 SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
431 SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
433 //===--------------------------------------------------------------------===//
434 // Vector Splitting Support: LegalizeVectorTypes.cpp
435 //===--------------------------------------------------------------------===//
437 void GetSplitVector(SDValue Op, SDValue &Lo, SDValue &Hi);
438 void SetSplitVector(SDValue Op, SDValue Lo, SDValue Hi);
440 // Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>.
441 void SplitVectorResult(SDNode *N, unsigned OpNo);
442 void SplitVecRes_BinOp(SDNode *N, SDValue &Lo, SDValue &Hi);
443 void SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
445 void SplitVecRes_BIT_CONVERT(SDNode *N, SDValue &Lo, SDValue &Hi);
446 void SplitVecRes_BUILD_PAIR(SDNode *N, SDValue &Lo, SDValue &Hi);
447 void SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
448 void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo, SDValue &Hi);
449 void SplitVecRes_FPOWI(SDNode *N, SDValue &Lo, SDValue &Hi);
450 void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
451 void SplitVecRes_LOAD(LoadSDNode *N, SDValue &Lo, SDValue &Hi);
452 void SplitVecRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi);
453 void SplitVecRes_VECTOR_SHUFFLE(SDNode *N, SDValue &Lo, SDValue &Hi);
454 void SplitVecRes_VSETCC(SDNode *N, SDValue &Lo, SDValue &Hi);
456 // Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>.
457 bool SplitVectorOperand(SDNode *N, unsigned OpNo);
459 SDValue SplitVecOp_BIT_CONVERT(SDNode *N);
460 SDValue SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N);
461 SDValue SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
462 SDValue SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo);
463 SDValue SplitVecOp_VECTOR_SHUFFLE(SDNode *N, unsigned OpNo);
465 //===--------------------------------------------------------------------===//
466 // Generic Splitting: LegalizeTypesGeneric.cpp
467 //===--------------------------------------------------------------------===//
469 // Legalization methods which only use that the illegal type is split into two
470 // not necessarily identical types. As such they can be used for splitting
471 // vectors and expanding integers and floats.
473 void GetSplitOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
474 if (Op.getValueType().isVector())
475 GetSplitVector(Op, Lo, Hi);
476 else if (Op.getValueType().isInteger())
477 GetExpandedInteger(Op, Lo, Hi);
479 GetExpandedFloat(Op, Lo, Hi);
482 /// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
483 /// which is split (or expanded) into two not necessarily identical pieces.
484 void GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT);
486 // Generic Result Splitting.
487 void SplitRes_MERGE_VALUES(SDNode *N, SDValue &Lo, SDValue &Hi);
488 void SplitRes_SELECT (SDNode *N, SDValue &Lo, SDValue &Hi);
489 void SplitRes_SELECT_CC (SDNode *N, SDValue &Lo, SDValue &Hi);
490 void SplitRes_UNDEF (SDNode *N, SDValue &Lo, SDValue &Hi);
492 //===--------------------------------------------------------------------===//
493 // Generic Expansion: LegalizeTypesGeneric.cpp
494 //===--------------------------------------------------------------------===//
496 // Legalization methods which only use that the illegal type is split into two
497 // identical types of half the size, and that the Lo/Hi part is stored first
498 // in memory on little/big-endian machines, followed by the Hi/Lo part. As
499 // such they can be used for expanding integers and floats.
501 void GetExpandedOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
502 if (Op.getValueType().isInteger())
503 GetExpandedInteger(Op, Lo, Hi);
505 GetExpandedFloat(Op, Lo, Hi);
508 // Generic Result Expansion.
509 void ExpandRes_BIT_CONVERT (SDNode *N, SDValue &Lo, SDValue &Hi);
510 void ExpandRes_BUILD_PAIR (SDNode *N, SDValue &Lo, SDValue &Hi);
511 void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDValue &Lo, SDValue &Hi);
512 void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
513 void ExpandRes_NormalLoad (SDNode *N, SDValue &Lo, SDValue &Hi);
515 // Generic Operand Expansion.
516 SDValue ExpandOp_BIT_CONVERT (SDNode *N);
517 SDValue ExpandOp_BUILD_VECTOR (SDNode *N);
518 SDValue ExpandOp_EXTRACT_ELEMENT(SDNode *N);
519 SDValue ExpandOp_NormalStore (SDNode *N, unsigned OpNo);
523 } // end namespace llvm.