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
30 /// hacks on it until the target machine can handle it. This involves
31 /// eliminating value sizes the machine cannot handle (promoting small sizes to
32 /// large sizes or splitting up large values into small values) as well as
33 /// eliminating operations the machine cannot handle.
35 /// This code also does a small amount of optimization and recognition of idioms
36 /// as part of its processing. For example, if a target does not support a
37 /// 'setcc' instruction efficiently, but does support 'brcc' instruction, this
38 /// will attempt merge setcc and brc instructions into brcc's.
40 class VISIBILITY_HIDDEN DAGTypeLegalizer {
44 // NodeIDFlags - This pass uses the NodeID on the SDNodes to hold information
45 // about the state of the node. The enum has all the values.
47 /// ReadyToProcess - All operands have been processed, so this node is ready
51 /// NewNode - This is a new node that was created in the process of
52 /// legalizing some other node.
55 /// Processed - This is a node that has already been processed.
58 // 1+ - This is a node which has this many unlegalized operands.
62 Legal, // The target natively supports this type.
63 PromoteInteger, // Replace this integer type with a larger one.
64 ExpandInteger, // Split this integer type into two of half the size.
65 SoftenFloat, // Convert this float type to a same size integer type.
66 ExpandFloat, // Split this float type into two of half the size.
67 Scalarize, // Replace this one-element vector type with its element type.
68 Split // This vector type should be split into smaller vectors.
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;
76 /// getTypeAction - Return how we should legalize values of this type, either
77 /// it is already legal, or we need to promote it to a larger integer type, or
78 /// we need to expand it into multiple registers of a smaller integer type, or
79 /// we need to scalarize a one-element vector type into the element type, or
80 /// we need to split a vector type into smaller vector types.
81 LegalizeAction getTypeAction(MVT VT) const {
82 switch (ValueTypeActions.getTypeAction(VT)) {
84 assert(false && "Unknown legalize action!");
85 case TargetLowering::Legal:
87 case TargetLowering::Promote:
88 return PromoteInteger;
89 case TargetLowering::Expand:
91 // 1) split scalar in half, 2) convert a float to an integer,
92 // 3) scalarize a single-element vector, 4) split a vector in two.
96 else if (VT.getSizeInBits() ==
97 TLI.getTypeToTransformTo(VT).getSizeInBits())
101 } else if (VT.getVectorNumElements() == 1) {
109 /// isTypeLegal - Return true if this type is legal on this target.
110 bool isTypeLegal(MVT VT) const {
111 return ValueTypeActions.getTypeAction(VT) == TargetLowering::Legal;
114 /// PromotedIntegers - For integer nodes that are below legal width, this map
115 /// indicates what promoted value to use.
116 DenseMap<SDOperand, SDOperand> PromotedIntegers;
118 /// ExpandedIntegers - For integer nodes that need to be expanded this map
119 /// indicates which operands are the expanded version of the input.
120 DenseMap<SDOperand, std::pair<SDOperand, SDOperand> > ExpandedIntegers;
122 /// SoftenedFloats - For floating point nodes converted to integers of
123 /// the same size, this map indicates the converted value to use.
124 DenseMap<SDOperand, SDOperand> SoftenedFloats;
126 /// ExpandedFloats - For float nodes that need to be expanded this map
127 /// indicates which operands are the expanded version of the input.
128 DenseMap<SDOperand, std::pair<SDOperand, SDOperand> > ExpandedFloats;
130 /// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the
131 /// scalar value of type 'ty' to use.
132 DenseMap<SDOperand, SDOperand> ScalarizedVectors;
134 /// SplitVectors - For nodes that need to be split this map indicates
135 /// which operands are the expanded version of the input.
136 DenseMap<SDOperand, std::pair<SDOperand, SDOperand> > SplitVectors;
138 /// ReplacedNodes - For nodes that have been replaced with another,
139 /// indicates the replacement node to use.
140 DenseMap<SDOperand, SDOperand> ReplacedNodes;
142 /// Worklist - This defines a worklist of nodes to process. In order to be
143 /// pushed onto this worklist, all operands of a node must have already been
145 SmallVector<SDNode*, 128> Worklist;
148 explicit DAGTypeLegalizer(SelectionDAG &dag)
149 : TLI(dag.getTargetLoweringInfo()), DAG(dag),
150 ValueTypeActions(TLI.getValueTypeActions()) {
151 assert(MVT::LAST_VALUETYPE <= 32 &&
152 "Too many value types for ValueTypeActions to hold!");
157 /// ReanalyzeNode - Recompute the NodeID and correct processed operands
158 /// for the specified node, adding it to the worklist if ready.
159 void ReanalyzeNode(SDNode *N) {
160 N->setNodeId(NewNode);
164 void NoteDeletion(SDNode *Old, SDNode *New) {
167 for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
168 ReplacedNodes[SDOperand(Old, i)] = SDOperand(New, i);
172 void AnalyzeNewNode(SDNode *&N);
174 void ReplaceValueWith(SDOperand From, SDOperand To);
175 void ReplaceNodeWith(SDNode *From, SDNode *To);
177 void RemapNode(SDOperand &N);
178 void ExpungeNode(SDNode *N);
181 SDOperand CreateStackStoreLoad(SDOperand Op, MVT DestVT);
182 SDOperand MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
183 const SDOperand *Ops, unsigned NumOps, bool isSigned);
185 SDOperand BitConvertToInteger(SDOperand Op);
186 SDOperand JoinIntegers(SDOperand Lo, SDOperand Hi);
187 void SplitInteger(SDOperand Op, SDOperand &Lo, SDOperand &Hi);
188 void SplitInteger(SDOperand Op, MVT LoVT, MVT HiVT,
189 SDOperand &Lo, SDOperand &Hi);
191 SDOperand GetVectorElementPointer(SDOperand VecPtr, MVT EltVT,
194 //===--------------------------------------------------------------------===//
195 // Integer Promotion Support: LegalizeIntegerTypes.cpp
196 //===--------------------------------------------------------------------===//
198 SDOperand GetPromotedInteger(SDOperand Op) {
199 SDOperand &PromotedOp = PromotedIntegers[Op];
200 RemapNode(PromotedOp);
201 assert(PromotedOp.Val && "Operand wasn't promoted?");
204 void SetPromotedInteger(SDOperand Op, SDOperand Result);
206 /// ZExtPromotedInteger - Get a promoted operand and zero extend it to the
208 SDOperand ZExtPromotedInteger(SDOperand Op) {
209 MVT OldVT = Op.getValueType();
210 Op = GetPromotedInteger(Op);
211 return DAG.getZeroExtendInReg(Op, OldVT);
214 // Integer Result Promotion.
215 void PromoteIntegerResult(SDNode *N, unsigned ResNo);
216 SDOperand PromoteIntRes_BIT_CONVERT(SDNode *N);
217 SDOperand PromoteIntRes_BUILD_PAIR(SDNode *N);
218 SDOperand PromoteIntRes_Constant(SDNode *N);
219 SDOperand PromoteIntRes_CTLZ(SDNode *N);
220 SDOperand PromoteIntRes_CTPOP(SDNode *N);
221 SDOperand PromoteIntRes_CTTZ(SDNode *N);
222 SDOperand PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N);
223 SDOperand PromoteIntRes_FP_ROUND(SDNode *N);
224 SDOperand PromoteIntRes_FP_TO_XINT(SDNode *N);
225 SDOperand PromoteIntRes_INT_EXTEND(SDNode *N);
226 SDOperand PromoteIntRes_LOAD(LoadSDNode *N);
227 SDOperand PromoteIntRes_SDIV(SDNode *N);
228 SDOperand PromoteIntRes_SELECT (SDNode *N);
229 SDOperand PromoteIntRes_SELECT_CC(SDNode *N);
230 SDOperand PromoteIntRes_SETCC(SDNode *N);
231 SDOperand PromoteIntRes_SHL(SDNode *N);
232 SDOperand PromoteIntRes_SimpleIntBinOp(SDNode *N);
233 SDOperand PromoteIntRes_SRA(SDNode *N);
234 SDOperand PromoteIntRes_SRL(SDNode *N);
235 SDOperand PromoteIntRes_TRUNCATE(SDNode *N);
236 SDOperand PromoteIntRes_UDIV(SDNode *N);
237 SDOperand PromoteIntRes_UNDEF(SDNode *N);
238 SDOperand PromoteIntRes_VAARG(SDNode *N);
240 // Integer Operand Promotion.
241 bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo);
242 SDOperand PromoteIntOp_ANY_EXTEND(SDNode *N);
243 SDOperand PromoteIntOp_BUILD_PAIR(SDNode *N);
244 SDOperand PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo);
245 SDOperand PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo);
246 SDOperand PromoteIntOp_BUILD_VECTOR(SDNode *N);
247 SDOperand PromoteIntOp_FP_EXTEND(SDNode *N);
248 SDOperand PromoteIntOp_FP_ROUND(SDNode *N);
249 SDOperand PromoteIntOp_INT_TO_FP(SDNode *N);
250 SDOperand PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
251 SDOperand PromoteIntOp_MEMBARRIER(SDNode *N);
252 SDOperand PromoteIntOp_SELECT(SDNode *N, unsigned OpNo);
253 SDOperand PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo);
254 SDOperand PromoteIntOp_SETCC(SDNode *N, unsigned OpNo);
255 SDOperand PromoteIntOp_SIGN_EXTEND(SDNode *N);
256 SDOperand PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo);
257 SDOperand PromoteIntOp_TRUNCATE(SDNode *N);
258 SDOperand PromoteIntOp_ZERO_EXTEND(SDNode *N);
260 void PromoteSetCCOperands(SDOperand &LHS,SDOperand &RHS, ISD::CondCode Code);
262 //===--------------------------------------------------------------------===//
263 // Integer Expansion Support: LegalizeIntegerTypes.cpp
264 //===--------------------------------------------------------------------===//
266 void GetExpandedInteger(SDOperand Op, SDOperand &Lo, SDOperand &Hi);
267 void SetExpandedInteger(SDOperand Op, SDOperand Lo, SDOperand Hi);
269 // Integer Result Expansion.
270 void ExpandIntegerResult(SDNode *N, unsigned ResNo);
271 void ExpandIntRes_ANY_EXTEND (SDNode *N, SDOperand &Lo, SDOperand &Hi);
272 void ExpandIntRes_AssertZext (SDNode *N, SDOperand &Lo, SDOperand &Hi);
273 void ExpandIntRes_Constant (SDNode *N, SDOperand &Lo, SDOperand &Hi);
274 void ExpandIntRes_CTLZ (SDNode *N, SDOperand &Lo, SDOperand &Hi);
275 void ExpandIntRes_CTPOP (SDNode *N, SDOperand &Lo, SDOperand &Hi);
276 void ExpandIntRes_CTTZ (SDNode *N, SDOperand &Lo, SDOperand &Hi);
277 void ExpandIntRes_LOAD (LoadSDNode *N, SDOperand &Lo, SDOperand &Hi);
278 void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDOperand &Lo, SDOperand &Hi);
279 void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDOperand &Lo, SDOperand &Hi);
280 void ExpandIntRes_TRUNCATE (SDNode *N, SDOperand &Lo, SDOperand &Hi);
281 void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDOperand &Lo, SDOperand &Hi);
282 void ExpandIntRes_FP_TO_SINT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
283 void ExpandIntRes_FP_TO_UINT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
285 void ExpandIntRes_Logical (SDNode *N, SDOperand &Lo, SDOperand &Hi);
286 void ExpandIntRes_ADDSUB (SDNode *N, SDOperand &Lo, SDOperand &Hi);
287 void ExpandIntRes_ADDSUBC (SDNode *N, SDOperand &Lo, SDOperand &Hi);
288 void ExpandIntRes_ADDSUBE (SDNode *N, SDOperand &Lo, SDOperand &Hi);
289 void ExpandIntRes_BSWAP (SDNode *N, SDOperand &Lo, SDOperand &Hi);
290 void ExpandIntRes_MUL (SDNode *N, SDOperand &Lo, SDOperand &Hi);
291 void ExpandIntRes_SDIV (SDNode *N, SDOperand &Lo, SDOperand &Hi);
292 void ExpandIntRes_SREM (SDNode *N, SDOperand &Lo, SDOperand &Hi);
293 void ExpandIntRes_UDIV (SDNode *N, SDOperand &Lo, SDOperand &Hi);
294 void ExpandIntRes_UREM (SDNode *N, SDOperand &Lo, SDOperand &Hi);
295 void ExpandIntRes_Shift (SDNode *N, SDOperand &Lo, SDOperand &Hi);
297 void ExpandShiftByConstant(SDNode *N, unsigned Amt,
298 SDOperand &Lo, SDOperand &Hi);
299 bool ExpandShiftWithKnownAmountBit(SDNode *N, SDOperand &Lo, SDOperand &Hi);
301 // Integer Operand Expansion.
302 bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo);
303 SDOperand ExpandIntOp_BIT_CONVERT(SDNode *N);
304 SDOperand ExpandIntOp_BR_CC(SDNode *N);
305 SDOperand ExpandIntOp_BUILD_VECTOR(SDNode *N);
306 SDOperand ExpandIntOp_EXTRACT_ELEMENT(SDNode *N);
307 SDOperand ExpandIntOp_SELECT_CC(SDNode *N);
308 SDOperand ExpandIntOp_SETCC(SDNode *N);
309 SDOperand ExpandIntOp_SINT_TO_FP(SDOperand Source, MVT DestTy);
310 SDOperand ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo);
311 SDOperand ExpandIntOp_TRUNCATE(SDNode *N);
312 SDOperand ExpandIntOp_UINT_TO_FP(SDOperand Source, MVT DestTy);
314 void IntegerExpandSetCCOperands(SDOperand &NewLHS, SDOperand &NewRHS,
315 ISD::CondCode &CCCode);
317 //===--------------------------------------------------------------------===//
318 // Float to Integer Conversion Support: LegalizeFloatTypes.cpp
319 //===--------------------------------------------------------------------===//
321 SDOperand GetSoftenedFloat(SDOperand Op) {
322 SDOperand &SoftenedOp = SoftenedFloats[Op];
323 RemapNode(SoftenedOp);
324 assert(SoftenedOp.Val && "Operand wasn't converted to integer?");
327 void SetSoftenedFloat(SDOperand Op, SDOperand Result);
329 // Result Float to Integer Conversion.
330 void SoftenFloatResult(SDNode *N, unsigned OpNo);
331 SDOperand SoftenFloatRes_BIT_CONVERT(SDNode *N);
332 SDOperand SoftenFloatRes_BUILD_PAIR(SDNode *N);
333 SDOperand SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
334 SDOperand SoftenFloatRes_FADD(SDNode *N);
335 SDOperand SoftenFloatRes_FCOPYSIGN(SDNode *N);
336 SDOperand SoftenFloatRes_FMUL(SDNode *N);
337 SDOperand SoftenFloatRes_FP_EXTEND(SDNode *N);
338 SDOperand SoftenFloatRes_FP_ROUND(SDNode *N);
339 SDOperand SoftenFloatRes_FPOWI(SDNode *N);
340 SDOperand SoftenFloatRes_FSUB(SDNode *N);
341 SDOperand SoftenFloatRes_LOAD(SDNode *N);
342 SDOperand SoftenFloatRes_SELECT(SDNode *N);
343 SDOperand SoftenFloatRes_SELECT_CC(SDNode *N);
344 SDOperand SoftenFloatRes_XINT_TO_FP(SDNode *N);
346 // Operand Float to Integer Conversion.
347 bool SoftenFloatOperand(SDNode *N, unsigned OpNo);
348 SDOperand SoftenFloatOp_BIT_CONVERT(SDNode *N);
349 SDOperand SoftenFloatOp_BR_CC(SDNode *N);
350 SDOperand SoftenFloatOp_FP_TO_SINT(SDNode *N);
351 SDOperand SoftenFloatOp_FP_TO_UINT(SDNode *N);
352 SDOperand SoftenFloatOp_SELECT_CC(SDNode *N);
353 SDOperand SoftenFloatOp_SETCC(SDNode *N);
354 SDOperand SoftenFloatOp_STORE(SDNode *N, unsigned OpNo);
356 void SoftenSetCCOperands(SDOperand &NewLHS, SDOperand &NewRHS,
357 ISD::CondCode &CCCode);
359 //===--------------------------------------------------------------------===//
360 // Float Expansion Support: LegalizeFloatTypes.cpp
361 //===--------------------------------------------------------------------===//
363 void GetExpandedFloat(SDOperand Op, SDOperand &Lo, SDOperand &Hi);
364 void SetExpandedFloat(SDOperand Op, SDOperand Lo, SDOperand Hi);
366 // Float Result Expansion.
367 void ExpandFloatResult(SDNode *N, unsigned ResNo);
368 void ExpandFloatRes_ConstantFP(SDNode *N, SDOperand &Lo, SDOperand &Hi);
369 void ExpandFloatRes_FADD (SDNode *N, SDOperand &Lo, SDOperand &Hi);
370 void ExpandFloatRes_FDIV (SDNode *N, SDOperand &Lo, SDOperand &Hi);
371 void ExpandFloatRes_FMUL (SDNode *N, SDOperand &Lo, SDOperand &Hi);
372 void ExpandFloatRes_FSUB (SDNode *N, SDOperand &Lo, SDOperand &Hi);
373 void ExpandFloatRes_LOAD (SDNode *N, SDOperand &Lo, SDOperand &Hi);
374 void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDOperand &Lo, SDOperand &Hi);
376 // Float Operand Expansion.
377 bool ExpandFloatOperand(SDNode *N, unsigned OperandNo);
378 SDOperand ExpandFloatOp_BR_CC(SDNode *N);
379 SDOperand ExpandFloatOp_FP_ROUND(SDNode *N);
380 SDOperand ExpandFloatOp_FP_TO_SINT(SDNode *N);
381 SDOperand ExpandFloatOp_FP_TO_UINT(SDNode *N);
382 SDOperand ExpandFloatOp_SELECT_CC(SDNode *N);
383 SDOperand ExpandFloatOp_SETCC(SDNode *N);
384 SDOperand ExpandFloatOp_STORE(SDNode *N, unsigned OpNo);
386 void FloatExpandSetCCOperands(SDOperand &NewLHS, SDOperand &NewRHS,
387 ISD::CondCode &CCCode);
389 //===--------------------------------------------------------------------===//
390 // Scalarization Support: LegalizeVectorTypes.cpp
391 //===--------------------------------------------------------------------===//
393 SDOperand GetScalarizedVector(SDOperand Op) {
394 SDOperand &ScalarizedOp = ScalarizedVectors[Op];
395 RemapNode(ScalarizedOp);
396 assert(ScalarizedOp.Val && "Operand wasn't scalarized?");
399 void SetScalarizedVector(SDOperand Op, SDOperand Result);
401 // Vector Result Scalarization: <1 x ty> -> ty.
402 void ScalarizeResult(SDNode *N, unsigned OpNo);
403 SDOperand ScalarizeVecRes_BinOp(SDNode *N);
404 SDOperand ScalarizeVecRes_UnaryOp(SDNode *N);
406 SDOperand ScalarizeVecRes_BIT_CONVERT(SDNode *N);
407 SDOperand ScalarizeVecRes_FPOWI(SDNode *N);
408 SDOperand ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N);
409 SDOperand ScalarizeVecRes_LOAD(LoadSDNode *N);
410 SDOperand ScalarizeVecRes_SELECT(SDNode *N);
411 SDOperand ScalarizeVecRes_UNDEF(SDNode *N);
412 SDOperand ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N);
414 // Vector Operand Scalarization: <1 x ty> -> ty.
415 bool ScalarizeOperand(SDNode *N, unsigned OpNo);
416 SDOperand ScalarizeVecOp_BIT_CONVERT(SDNode *N);
417 SDOperand ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
418 SDOperand ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
420 //===--------------------------------------------------------------------===//
421 // Vector Splitting Support: LegalizeVectorTypes.cpp
422 //===--------------------------------------------------------------------===//
424 void GetSplitVector(SDOperand Op, SDOperand &Lo, SDOperand &Hi);
425 void SetSplitVector(SDOperand Op, SDOperand Lo, SDOperand Hi);
427 // Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>.
428 void SplitResult(SDNode *N, unsigned OpNo);
430 void SplitVecRes_UNDEF(SDNode *N, SDOperand &Lo, SDOperand &Hi);
431 void SplitVecRes_LOAD(LoadSDNode *N, SDOperand &Lo, SDOperand &Hi);
432 void SplitVecRes_BUILD_PAIR(SDNode *N, SDOperand &Lo, SDOperand &Hi);
433 void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDOperand &Lo, SDOperand &Hi);
434 void SplitVecRes_VECTOR_SHUFFLE(SDNode *N, SDOperand &Lo, SDOperand &Hi);
436 void SplitVecRes_BUILD_VECTOR(SDNode *N, SDOperand &Lo, SDOperand &Hi);
437 void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDOperand &Lo, SDOperand &Hi);
438 void SplitVecRes_BIT_CONVERT(SDNode *N, SDOperand &Lo, SDOperand &Hi);
439 void SplitVecRes_UnOp(SDNode *N, SDOperand &Lo, SDOperand &Hi);
440 void SplitVecRes_BinOp(SDNode *N, SDOperand &Lo, SDOperand &Hi);
441 void SplitVecRes_FPOWI(SDNode *N, SDOperand &Lo, SDOperand &Hi);
443 // Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>.
444 bool SplitOperand(SDNode *N, unsigned OpNo);
446 SDOperand SplitVecOp_BIT_CONVERT(SDNode *N);
447 SDOperand SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N);
448 SDOperand SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
449 SDOperand SplitVecOp_RET(SDNode *N, unsigned OpNo);
450 SDOperand SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo);
451 SDOperand SplitVecOp_VECTOR_SHUFFLE(SDNode *N, unsigned OpNo);
453 //===--------------------------------------------------------------------===//
454 // Generic Splitting: LegalizeTypesGeneric.cpp
455 //===--------------------------------------------------------------------===//
457 // Legalization methods which only use that the illegal type is split into two
458 // not necessarily identical types. As such they can be used for splitting
459 // vectors and expanding integers and floats.
461 void GetSplitOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi) {
462 if (Op.getValueType().isVector())
463 GetSplitVector(Op, Lo, Hi);
464 else if (Op.getValueType().isInteger())
465 GetExpandedInteger(Op, Lo, Hi);
467 GetExpandedFloat(Op, Lo, Hi);
470 /// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
471 /// which is split (or expanded) into two not necessarily identical pieces.
472 void GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT);
474 // Generic Result Splitting.
475 void SplitRes_MERGE_VALUES(SDNode *N, SDOperand &Lo, SDOperand &Hi);
476 void SplitRes_SELECT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
477 void SplitRes_SELECT_CC (SDNode *N, SDOperand &Lo, SDOperand &Hi);
478 void SplitRes_UNDEF (SDNode *N, SDOperand &Lo, SDOperand &Hi);
480 //===--------------------------------------------------------------------===//
481 // Generic Expansion: LegalizeTypesGeneric.cpp
482 //===--------------------------------------------------------------------===//
484 // Legalization methods which only use that the illegal type is split into two
485 // identical types of half the size, and that the Lo/Hi part is stored first
486 // in memory on little/big-endian machines, followed by the Hi/Lo part. As
487 // such they can be used for expanding integers and floats.
489 void GetExpandedOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi) {
490 if (Op.getValueType().isInteger())
491 GetExpandedInteger(Op, Lo, Hi);
493 GetExpandedFloat(Op, Lo, Hi);
496 // Generic Result Expansion.
497 void ExpandRes_BIT_CONVERT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
498 void ExpandRes_BUILD_PAIR (SDNode *N, SDOperand &Lo, SDOperand &Hi);
499 void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
500 void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDOperand &Lo, SDOperand &Hi);
501 void ExpandRes_NormalLoad (SDNode *N, SDOperand &Lo, SDOperand &Hi);
503 // Generic Operand Expansion.
504 SDOperand ExpandOp_BIT_CONVERT (SDNode *N);
505 SDOperand ExpandOp_BUILD_VECTOR (SDNode *N);
506 SDOperand ExpandOp_EXTRACT_ELEMENT(SDNode *N);
507 SDOperand ExpandOp_NormalStore (SDNode *N, unsigned OpNo);
511 } // end namespace llvm.