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<SDOperand, SDOperand> 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<SDOperand, std::pair<SDOperand, SDOperand> > 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<SDOperand, SDOperand> 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<SDOperand, std::pair<SDOperand, SDOperand> > ExpandedFloats;
129 /// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the
130 /// scalar value of type 'ty' to use.
131 DenseMap<SDOperand, SDOperand> 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<SDOperand, std::pair<SDOperand, SDOperand> > SplitVectors;
137 /// ReplacedNodes - For nodes that have been replaced with another,
138 /// indicates the replacement node to use.
139 DenseMap<SDOperand, SDOperand> 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 void ReanalyzeNode(SDNode *N) {
159 N->setNodeId(NewNode);
163 void NoteDeletion(SDNode *Old, SDNode *New) {
166 for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
167 ReplacedNodes[SDOperand(Old, i)] = SDOperand(New, i);
171 void AnalyzeNewNode(SDNode *&N);
173 void ReplaceValueWith(SDOperand From, SDOperand To);
174 void ReplaceNodeWith(SDNode *From, SDNode *To);
176 void RemapNode(SDOperand &N);
177 void ExpungeNode(SDNode *N);
180 SDOperand CreateStackStoreLoad(SDOperand Op, MVT DestVT);
181 SDOperand MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
182 const SDOperand *Ops, unsigned NumOps, bool isSigned);
184 SDOperand BitConvertToInteger(SDOperand Op);
185 SDOperand JoinIntegers(SDOperand Lo, SDOperand Hi);
186 void SplitInteger(SDOperand Op, SDOperand &Lo, SDOperand &Hi);
187 void SplitInteger(SDOperand Op, MVT LoVT, MVT HiVT,
188 SDOperand &Lo, SDOperand &Hi);
190 SDOperand GetVectorElementPointer(SDOperand VecPtr, MVT EltVT,
193 //===--------------------------------------------------------------------===//
194 // Integer Promotion Support: LegalizeIntegerTypes.cpp
195 //===--------------------------------------------------------------------===//
197 SDOperand GetPromotedInteger(SDOperand Op) {
198 SDOperand &PromotedOp = PromotedIntegers[Op];
199 RemapNode(PromotedOp);
200 assert(PromotedOp.Val && "Operand wasn't promoted?");
203 void SetPromotedInteger(SDOperand Op, SDOperand Result);
205 /// ZExtPromotedInteger - Get a promoted operand and zero extend it to the
207 SDOperand ZExtPromotedInteger(SDOperand 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 SDOperand PromoteIntRes_AssertSext(SDNode *N);
216 SDOperand PromoteIntRes_AssertZext(SDNode *N);
217 SDOperand PromoteIntRes_BIT_CONVERT(SDNode *N);
218 SDOperand PromoteIntRes_BSWAP(SDNode *N);
219 SDOperand PromoteIntRes_BUILD_PAIR(SDNode *N);
220 SDOperand PromoteIntRes_Constant(SDNode *N);
221 SDOperand PromoteIntRes_CTLZ(SDNode *N);
222 SDOperand PromoteIntRes_CTPOP(SDNode *N);
223 SDOperand PromoteIntRes_CTTZ(SDNode *N);
224 SDOperand PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N);
225 SDOperand PromoteIntRes_FP_TO_XINT(SDNode *N);
226 SDOperand PromoteIntRes_INT_EXTEND(SDNode *N);
227 SDOperand PromoteIntRes_LOAD(LoadSDNode *N);
228 SDOperand PromoteIntRes_SDIV(SDNode *N);
229 SDOperand PromoteIntRes_SELECT (SDNode *N);
230 SDOperand PromoteIntRes_SELECT_CC(SDNode *N);
231 SDOperand PromoteIntRes_SETCC(SDNode *N);
232 SDOperand PromoteIntRes_SHL(SDNode *N);
233 SDOperand PromoteIntRes_SimpleIntBinOp(SDNode *N);
234 SDOperand PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N);
235 SDOperand PromoteIntRes_SRA(SDNode *N);
236 SDOperand PromoteIntRes_SRL(SDNode *N);
237 SDOperand PromoteIntRes_TRUNCATE(SDNode *N);
238 SDOperand PromoteIntRes_UDIV(SDNode *N);
239 SDOperand PromoteIntRes_UNDEF(SDNode *N);
240 SDOperand PromoteIntRes_VAARG(SDNode *N);
242 // Integer Operand Promotion.
243 bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo);
244 SDOperand PromoteIntOp_ANY_EXTEND(SDNode *N);
245 SDOperand PromoteIntOp_BUILD_PAIR(SDNode *N);
246 SDOperand PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo);
247 SDOperand PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo);
248 SDOperand PromoteIntOp_BUILD_VECTOR(SDNode *N);
249 SDOperand PromoteIntOp_FP_EXTEND(SDNode *N);
250 SDOperand PromoteIntOp_FP_ROUND(SDNode *N);
251 SDOperand PromoteIntOp_INT_TO_FP(SDNode *N);
252 SDOperand PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
253 SDOperand PromoteIntOp_MEMBARRIER(SDNode *N);
254 SDOperand PromoteIntOp_SELECT(SDNode *N, unsigned OpNo);
255 SDOperand PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo);
256 SDOperand PromoteIntOp_SETCC(SDNode *N, unsigned OpNo);
257 SDOperand PromoteIntOp_SIGN_EXTEND(SDNode *N);
258 SDOperand PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo);
259 SDOperand PromoteIntOp_TRUNCATE(SDNode *N);
260 SDOperand PromoteIntOp_ZERO_EXTEND(SDNode *N);
262 void PromoteSetCCOperands(SDOperand &LHS,SDOperand &RHS, ISD::CondCode Code);
264 //===--------------------------------------------------------------------===//
265 // Integer Expansion Support: LegalizeIntegerTypes.cpp
266 //===--------------------------------------------------------------------===//
268 void GetExpandedInteger(SDOperand Op, SDOperand &Lo, SDOperand &Hi);
269 void SetExpandedInteger(SDOperand Op, SDOperand Lo, SDOperand Hi);
271 // Integer Result Expansion.
272 void ExpandIntegerResult(SDNode *N, unsigned ResNo);
273 void ExpandIntRes_ANY_EXTEND (SDNode *N, SDOperand &Lo, SDOperand &Hi);
274 void ExpandIntRes_AssertSext (SDNode *N, SDOperand &Lo, SDOperand &Hi);
275 void ExpandIntRes_AssertZext (SDNode *N, SDOperand &Lo, SDOperand &Hi);
276 void ExpandIntRes_Constant (SDNode *N, SDOperand &Lo, SDOperand &Hi);
277 void ExpandIntRes_CTLZ (SDNode *N, SDOperand &Lo, SDOperand &Hi);
278 void ExpandIntRes_CTPOP (SDNode *N, SDOperand &Lo, SDOperand &Hi);
279 void ExpandIntRes_CTTZ (SDNode *N, SDOperand &Lo, SDOperand &Hi);
280 void ExpandIntRes_LOAD (LoadSDNode *N, SDOperand &Lo, SDOperand &Hi);
281 void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDOperand &Lo, SDOperand &Hi);
282 void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDOperand &Lo, SDOperand &Hi);
283 void ExpandIntRes_TRUNCATE (SDNode *N, SDOperand &Lo, SDOperand &Hi);
284 void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDOperand &Lo, SDOperand &Hi);
285 void ExpandIntRes_FP_TO_SINT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
286 void ExpandIntRes_FP_TO_UINT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
288 void ExpandIntRes_Logical (SDNode *N, SDOperand &Lo, SDOperand &Hi);
289 void ExpandIntRes_ADDSUB (SDNode *N, SDOperand &Lo, SDOperand &Hi);
290 void ExpandIntRes_ADDSUBC (SDNode *N, SDOperand &Lo, SDOperand &Hi);
291 void ExpandIntRes_ADDSUBE (SDNode *N, SDOperand &Lo, SDOperand &Hi);
292 void ExpandIntRes_BSWAP (SDNode *N, SDOperand &Lo, SDOperand &Hi);
293 void ExpandIntRes_MUL (SDNode *N, SDOperand &Lo, SDOperand &Hi);
294 void ExpandIntRes_SDIV (SDNode *N, SDOperand &Lo, SDOperand &Hi);
295 void ExpandIntRes_SREM (SDNode *N, SDOperand &Lo, SDOperand &Hi);
296 void ExpandIntRes_UDIV (SDNode *N, SDOperand &Lo, SDOperand &Hi);
297 void ExpandIntRes_UREM (SDNode *N, SDOperand &Lo, SDOperand &Hi);
298 void ExpandIntRes_Shift (SDNode *N, SDOperand &Lo, SDOperand &Hi);
300 void ExpandShiftByConstant(SDNode *N, unsigned Amt,
301 SDOperand &Lo, SDOperand &Hi);
302 bool ExpandShiftWithKnownAmountBit(SDNode *N, SDOperand &Lo, SDOperand &Hi);
304 // Integer Operand Expansion.
305 bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo);
306 SDOperand ExpandIntOp_BIT_CONVERT(SDNode *N);
307 SDOperand ExpandIntOp_BR_CC(SDNode *N);
308 SDOperand ExpandIntOp_BUILD_VECTOR(SDNode *N);
309 SDOperand ExpandIntOp_EXTRACT_ELEMENT(SDNode *N);
310 SDOperand ExpandIntOp_SELECT_CC(SDNode *N);
311 SDOperand ExpandIntOp_SETCC(SDNode *N);
312 SDOperand ExpandIntOp_SINT_TO_FP(SDNode *N);
313 SDOperand ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo);
314 SDOperand ExpandIntOp_TRUNCATE(SDNode *N);
315 SDOperand ExpandIntOp_UINT_TO_FP(SDNode *N);
317 void IntegerExpandSetCCOperands(SDOperand &NewLHS, SDOperand &NewRHS,
318 ISD::CondCode &CCCode);
320 //===--------------------------------------------------------------------===//
321 // Float to Integer Conversion Support: LegalizeFloatTypes.cpp
322 //===--------------------------------------------------------------------===//
324 SDOperand GetSoftenedFloat(SDOperand Op) {
325 SDOperand &SoftenedOp = SoftenedFloats[Op];
326 RemapNode(SoftenedOp);
327 assert(SoftenedOp.Val && "Operand wasn't converted to integer?");
330 void SetSoftenedFloat(SDOperand Op, SDOperand Result);
332 // Result Float to Integer Conversion.
333 void SoftenFloatResult(SDNode *N, unsigned OpNo);
334 SDOperand SoftenFloatRes_BIT_CONVERT(SDNode *N);
335 SDOperand SoftenFloatRes_BUILD_PAIR(SDNode *N);
336 SDOperand SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
337 SDOperand SoftenFloatRes_FADD(SDNode *N);
338 SDOperand SoftenFloatRes_FCOPYSIGN(SDNode *N);
339 SDOperand SoftenFloatRes_FMUL(SDNode *N);
340 SDOperand SoftenFloatRes_FP_EXTEND(SDNode *N);
341 SDOperand SoftenFloatRes_FP_ROUND(SDNode *N);
342 SDOperand SoftenFloatRes_FPOWI(SDNode *N);
343 SDOperand SoftenFloatRes_FSUB(SDNode *N);
344 SDOperand SoftenFloatRes_LOAD(SDNode *N);
345 SDOperand SoftenFloatRes_SELECT(SDNode *N);
346 SDOperand SoftenFloatRes_SELECT_CC(SDNode *N);
347 SDOperand SoftenFloatRes_SINT_TO_FP(SDNode *N);
348 SDOperand SoftenFloatRes_UINT_TO_FP(SDNode *N);
350 // Operand Float to Integer Conversion.
351 bool SoftenFloatOperand(SDNode *N, unsigned OpNo);
352 SDOperand SoftenFloatOp_BIT_CONVERT(SDNode *N);
353 SDOperand SoftenFloatOp_BR_CC(SDNode *N);
354 SDOperand SoftenFloatOp_FP_TO_SINT(SDNode *N);
355 SDOperand SoftenFloatOp_FP_TO_UINT(SDNode *N);
356 SDOperand SoftenFloatOp_SELECT_CC(SDNode *N);
357 SDOperand SoftenFloatOp_SETCC(SDNode *N);
358 SDOperand SoftenFloatOp_STORE(SDNode *N, unsigned OpNo);
360 void SoftenSetCCOperands(SDOperand &NewLHS, SDOperand &NewRHS,
361 ISD::CondCode &CCCode);
363 //===--------------------------------------------------------------------===//
364 // Float Expansion Support: LegalizeFloatTypes.cpp
365 //===--------------------------------------------------------------------===//
367 void GetExpandedFloat(SDOperand Op, SDOperand &Lo, SDOperand &Hi);
368 void SetExpandedFloat(SDOperand Op, SDOperand Lo, SDOperand Hi);
370 // Float Result Expansion.
371 void ExpandFloatResult(SDNode *N, unsigned ResNo);
372 void ExpandFloatRes_ConstantFP(SDNode *N, SDOperand &Lo, SDOperand &Hi);
373 void ExpandFloatRes_FABS (SDNode *N, SDOperand &Lo, SDOperand &Hi);
374 void ExpandFloatRes_FADD (SDNode *N, SDOperand &Lo, SDOperand &Hi);
375 void ExpandFloatRes_FDIV (SDNode *N, SDOperand &Lo, SDOperand &Hi);
376 void ExpandFloatRes_FMUL (SDNode *N, SDOperand &Lo, SDOperand &Hi);
377 void ExpandFloatRes_FSUB (SDNode *N, SDOperand &Lo, SDOperand &Hi);
378 void ExpandFloatRes_LOAD (SDNode *N, SDOperand &Lo, SDOperand &Hi);
379 void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDOperand &Lo, SDOperand &Hi);
381 // Float Operand Expansion.
382 bool ExpandFloatOperand(SDNode *N, unsigned OperandNo);
383 SDOperand ExpandFloatOp_BR_CC(SDNode *N);
384 SDOperand ExpandFloatOp_FP_ROUND(SDNode *N);
385 SDOperand ExpandFloatOp_FP_TO_SINT(SDNode *N);
386 SDOperand ExpandFloatOp_FP_TO_UINT(SDNode *N);
387 SDOperand ExpandFloatOp_SELECT_CC(SDNode *N);
388 SDOperand ExpandFloatOp_SETCC(SDNode *N);
389 SDOperand ExpandFloatOp_STORE(SDNode *N, unsigned OpNo);
391 void FloatExpandSetCCOperands(SDOperand &NewLHS, SDOperand &NewRHS,
392 ISD::CondCode &CCCode);
394 //===--------------------------------------------------------------------===//
395 // Scalarization Support: LegalizeVectorTypes.cpp
396 //===--------------------------------------------------------------------===//
398 SDOperand GetScalarizedVector(SDOperand Op) {
399 SDOperand &ScalarizedOp = ScalarizedVectors[Op];
400 RemapNode(ScalarizedOp);
401 assert(ScalarizedOp.Val && "Operand wasn't scalarized?");
404 void SetScalarizedVector(SDOperand Op, SDOperand Result);
406 // Vector Result Scalarization: <1 x ty> -> ty.
407 void ScalarizeVectorResult(SDNode *N, unsigned OpNo);
408 SDOperand ScalarizeVecRes_BinOp(SDNode *N);
409 SDOperand ScalarizeVecRes_UnaryOp(SDNode *N);
411 SDOperand ScalarizeVecRes_BIT_CONVERT(SDNode *N);
412 SDOperand ScalarizeVecRes_FPOWI(SDNode *N);
413 SDOperand ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N);
414 SDOperand ScalarizeVecRes_LOAD(LoadSDNode *N);
415 SDOperand ScalarizeVecRes_SELECT(SDNode *N);
416 SDOperand ScalarizeVecRes_UNDEF(SDNode *N);
417 SDOperand ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N);
419 // Vector Operand Scalarization: <1 x ty> -> ty.
420 bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
421 SDOperand ScalarizeVecOp_BIT_CONVERT(SDNode *N);
422 SDOperand ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
423 SDOperand ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
425 //===--------------------------------------------------------------------===//
426 // Vector Splitting Support: LegalizeVectorTypes.cpp
427 //===--------------------------------------------------------------------===//
429 void GetSplitVector(SDOperand Op, SDOperand &Lo, SDOperand &Hi);
430 void SetSplitVector(SDOperand Op, SDOperand Lo, SDOperand Hi);
432 // Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>.
433 void SplitVectorResult(SDNode *N, unsigned OpNo);
435 void SplitVecRes_UNDEF(SDNode *N, SDOperand &Lo, SDOperand &Hi);
436 void SplitVecRes_LOAD(LoadSDNode *N, SDOperand &Lo, SDOperand &Hi);
437 void SplitVecRes_BUILD_PAIR(SDNode *N, SDOperand &Lo, SDOperand &Hi);
438 void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDOperand &Lo, SDOperand &Hi);
439 void SplitVecRes_VECTOR_SHUFFLE(SDNode *N, SDOperand &Lo, SDOperand &Hi);
441 void SplitVecRes_BUILD_VECTOR(SDNode *N, SDOperand &Lo, SDOperand &Hi);
442 void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDOperand &Lo, SDOperand &Hi);
443 void SplitVecRes_BIT_CONVERT(SDNode *N, SDOperand &Lo, SDOperand &Hi);
444 void SplitVecRes_UnOp(SDNode *N, SDOperand &Lo, SDOperand &Hi);
445 void SplitVecRes_BinOp(SDNode *N, SDOperand &Lo, SDOperand &Hi);
446 void SplitVecRes_FPOWI(SDNode *N, SDOperand &Lo, SDOperand &Hi);
448 // Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>.
449 bool SplitVectorOperand(SDNode *N, unsigned OpNo);
451 SDOperand SplitVecOp_BIT_CONVERT(SDNode *N);
452 SDOperand SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N);
453 SDOperand SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
454 SDOperand SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo);
455 SDOperand SplitVecOp_VECTOR_SHUFFLE(SDNode *N, unsigned OpNo);
457 //===--------------------------------------------------------------------===//
458 // Generic Splitting: LegalizeTypesGeneric.cpp
459 //===--------------------------------------------------------------------===//
461 // Legalization methods which only use that the illegal type is split into two
462 // not necessarily identical types. As such they can be used for splitting
463 // vectors and expanding integers and floats.
465 void GetSplitOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi) {
466 if (Op.getValueType().isVector())
467 GetSplitVector(Op, Lo, Hi);
468 else if (Op.getValueType().isInteger())
469 GetExpandedInteger(Op, Lo, Hi);
471 GetExpandedFloat(Op, Lo, Hi);
474 /// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
475 /// which is split (or expanded) into two not necessarily identical pieces.
476 void GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT);
478 // Generic Result Splitting.
479 void SplitRes_MERGE_VALUES(SDNode *N, SDOperand &Lo, SDOperand &Hi);
480 void SplitRes_SELECT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
481 void SplitRes_SELECT_CC (SDNode *N, SDOperand &Lo, SDOperand &Hi);
482 void SplitRes_UNDEF (SDNode *N, SDOperand &Lo, SDOperand &Hi);
484 //===--------------------------------------------------------------------===//
485 // Generic Expansion: LegalizeTypesGeneric.cpp
486 //===--------------------------------------------------------------------===//
488 // Legalization methods which only use that the illegal type is split into two
489 // identical types of half the size, and that the Lo/Hi part is stored first
490 // in memory on little/big-endian machines, followed by the Hi/Lo part. As
491 // such they can be used for expanding integers and floats.
493 void GetExpandedOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi) {
494 if (Op.getValueType().isInteger())
495 GetExpandedInteger(Op, Lo, Hi);
497 GetExpandedFloat(Op, Lo, Hi);
500 // Generic Result Expansion.
501 void ExpandRes_BIT_CONVERT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
502 void ExpandRes_BUILD_PAIR (SDNode *N, SDOperand &Lo, SDOperand &Hi);
503 void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
504 void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDOperand &Lo, SDOperand &Hi);
505 void ExpandRes_NormalLoad (SDNode *N, SDOperand &Lo, SDOperand &Hi);
507 // Generic Operand Expansion.
508 SDOperand ExpandOp_BIT_CONVERT (SDNode *N);
509 SDOperand ExpandOp_BUILD_VECTOR (SDNode *N);
510 SDOperand ExpandOp_EXTRACT_ELEMENT(SDNode *N);
511 SDOperand ExpandOp_NormalStore (SDNode *N, unsigned OpNo);
515 } // end namespace llvm.