1 //===------- LegalizeVectorTypes.cpp - Legalization of vector types -------===//
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 performs vector type splitting and scalarization for LegalizeTypes.
11 // Scalarization is the act of changing a computation in an illegal one-element
12 // vector type to be a computation in its scalar element type. For example,
13 // implementing <1 x f32> arithmetic in a scalar f32 register. This is needed
14 // as a base case when scalarizing vector arithmetic like <4 x f32>, which
15 // eventually decomposes to scalars if the target doesn't support v4f32 or v2f32
17 // Splitting is the act of changing a computation in an invalid vector type to
18 // be a computation in two vectors of half the size. For example, implementing
19 // <128 x f32> operations in terms of two <64 x f32> operations.
21 //===----------------------------------------------------------------------===//
23 #include "LegalizeTypes.h"
24 #include "llvm/IR/DataLayout.h"
25 #include "llvm/Support/ErrorHandling.h"
26 #include "llvm/Support/raw_ostream.h"
29 //===----------------------------------------------------------------------===//
30 // Result Vector Scalarization: <1 x ty> -> ty.
31 //===----------------------------------------------------------------------===//
33 void DAGTypeLegalizer::ScalarizeVectorResult(SDNode *N, unsigned ResNo) {
34 DEBUG(dbgs() << "Scalarize node result " << ResNo << ": ";
37 SDValue R = SDValue();
39 switch (N->getOpcode()) {
42 dbgs() << "ScalarizeVectorResult #" << ResNo << ": ";
46 report_fatal_error("Do not know how to scalarize the result of this "
49 case ISD::MERGE_VALUES: R = ScalarizeVecRes_MERGE_VALUES(N, ResNo);break;
50 case ISD::BITCAST: R = ScalarizeVecRes_BITCAST(N); break;
51 case ISD::BUILD_VECTOR: R = ScalarizeVecRes_BUILD_VECTOR(N); break;
52 case ISD::CONVERT_RNDSAT: R = ScalarizeVecRes_CONVERT_RNDSAT(N); break;
53 case ISD::EXTRACT_SUBVECTOR: R = ScalarizeVecRes_EXTRACT_SUBVECTOR(N); break;
54 case ISD::FP_ROUND: R = ScalarizeVecRes_FP_ROUND(N); break;
55 case ISD::FP_ROUND_INREG: R = ScalarizeVecRes_InregOp(N); break;
56 case ISD::FPOWI: R = ScalarizeVecRes_FPOWI(N); break;
57 case ISD::INSERT_VECTOR_ELT: R = ScalarizeVecRes_INSERT_VECTOR_ELT(N); break;
58 case ISD::LOAD: R = ScalarizeVecRes_LOAD(cast<LoadSDNode>(N));break;
59 case ISD::SCALAR_TO_VECTOR: R = ScalarizeVecRes_SCALAR_TO_VECTOR(N); break;
60 case ISD::SIGN_EXTEND_INREG: R = ScalarizeVecRes_InregOp(N); break;
61 case ISD::VSELECT: R = ScalarizeVecRes_VSELECT(N); break;
62 case ISD::SELECT: R = ScalarizeVecRes_SELECT(N); break;
63 case ISD::SELECT_CC: R = ScalarizeVecRes_SELECT_CC(N); break;
64 case ISD::SETCC: R = ScalarizeVecRes_SETCC(N); break;
65 case ISD::UNDEF: R = ScalarizeVecRes_UNDEF(N); break;
66 case ISD::VECTOR_SHUFFLE: R = ScalarizeVecRes_VECTOR_SHUFFLE(N); break;
89 case ISD::SIGN_EXTEND:
93 case ISD::ZERO_EXTEND:
94 R = ScalarizeVecRes_UnaryOp(N);
116 R = ScalarizeVecRes_BinOp(N);
119 R = ScalarizeVecRes_TernaryOp(N);
123 // If R is null, the sub-method took care of registering the result.
125 SetScalarizedVector(SDValue(N, ResNo), R);
128 SDValue DAGTypeLegalizer::ScalarizeVecRes_BinOp(SDNode *N) {
129 SDValue LHS = GetScalarizedVector(N->getOperand(0));
130 SDValue RHS = GetScalarizedVector(N->getOperand(1));
131 return DAG.getNode(N->getOpcode(), SDLoc(N),
132 LHS.getValueType(), LHS, RHS);
135 SDValue DAGTypeLegalizer::ScalarizeVecRes_TernaryOp(SDNode *N) {
136 SDValue Op0 = GetScalarizedVector(N->getOperand(0));
137 SDValue Op1 = GetScalarizedVector(N->getOperand(1));
138 SDValue Op2 = GetScalarizedVector(N->getOperand(2));
139 return DAG.getNode(N->getOpcode(), SDLoc(N),
140 Op0.getValueType(), Op0, Op1, Op2);
143 SDValue DAGTypeLegalizer::ScalarizeVecRes_MERGE_VALUES(SDNode *N,
145 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
146 return GetScalarizedVector(Op);
149 SDValue DAGTypeLegalizer::ScalarizeVecRes_BITCAST(SDNode *N) {
150 EVT NewVT = N->getValueType(0).getVectorElementType();
151 return DAG.getNode(ISD::BITCAST, SDLoc(N),
152 NewVT, N->getOperand(0));
155 SDValue DAGTypeLegalizer::ScalarizeVecRes_BUILD_VECTOR(SDNode *N) {
156 EVT EltVT = N->getValueType(0).getVectorElementType();
157 SDValue InOp = N->getOperand(0);
158 // The BUILD_VECTOR operands may be of wider element types and
159 // we may need to truncate them back to the requested return type.
160 if (EltVT.isInteger())
161 return DAG.getNode(ISD::TRUNCATE, SDLoc(N), EltVT, InOp);
165 SDValue DAGTypeLegalizer::ScalarizeVecRes_CONVERT_RNDSAT(SDNode *N) {
166 EVT NewVT = N->getValueType(0).getVectorElementType();
167 SDValue Op0 = GetScalarizedVector(N->getOperand(0));
168 return DAG.getConvertRndSat(NewVT, SDLoc(N),
169 Op0, DAG.getValueType(NewVT),
170 DAG.getValueType(Op0.getValueType()),
173 cast<CvtRndSatSDNode>(N)->getCvtCode());
176 SDValue DAGTypeLegalizer::ScalarizeVecRes_EXTRACT_SUBVECTOR(SDNode *N) {
177 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N),
178 N->getValueType(0).getVectorElementType(),
179 N->getOperand(0), N->getOperand(1));
182 SDValue DAGTypeLegalizer::ScalarizeVecRes_FP_ROUND(SDNode *N) {
183 EVT NewVT = N->getValueType(0).getVectorElementType();
184 SDValue Op = GetScalarizedVector(N->getOperand(0));
185 return DAG.getNode(ISD::FP_ROUND, SDLoc(N),
186 NewVT, Op, N->getOperand(1));
189 SDValue DAGTypeLegalizer::ScalarizeVecRes_FPOWI(SDNode *N) {
190 SDValue Op = GetScalarizedVector(N->getOperand(0));
191 return DAG.getNode(ISD::FPOWI, SDLoc(N),
192 Op.getValueType(), Op, N->getOperand(1));
195 SDValue DAGTypeLegalizer::ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N) {
196 // The value to insert may have a wider type than the vector element type,
197 // so be sure to truncate it to the element type if necessary.
198 SDValue Op = N->getOperand(1);
199 EVT EltVT = N->getValueType(0).getVectorElementType();
200 if (Op.getValueType() != EltVT)
201 // FIXME: Can this happen for floating point types?
202 Op = DAG.getNode(ISD::TRUNCATE, SDLoc(N), EltVT, Op);
206 SDValue DAGTypeLegalizer::ScalarizeVecRes_LOAD(LoadSDNode *N) {
207 assert(N->isUnindexed() && "Indexed vector load?");
209 SDValue Result = DAG.getLoad(ISD::UNINDEXED,
210 N->getExtensionType(),
211 N->getValueType(0).getVectorElementType(),
213 N->getChain(), N->getBasePtr(),
214 DAG.getUNDEF(N->getBasePtr().getValueType()),
216 N->getMemoryVT().getVectorElementType(),
217 N->isVolatile(), N->isNonTemporal(),
218 N->isInvariant(), N->getOriginalAlignment());
220 // Legalized the chain result - switch anything that used the old chain to
222 ReplaceValueWith(SDValue(N, 1), Result.getValue(1));
226 SDValue DAGTypeLegalizer::ScalarizeVecRes_UnaryOp(SDNode *N) {
227 // Get the dest type - it doesn't always match the input type, e.g. int_to_fp.
228 EVT DestVT = N->getValueType(0).getVectorElementType();
229 SDValue Op = GetScalarizedVector(N->getOperand(0));
230 return DAG.getNode(N->getOpcode(), SDLoc(N), DestVT, Op);
233 SDValue DAGTypeLegalizer::ScalarizeVecRes_InregOp(SDNode *N) {
234 EVT EltVT = N->getValueType(0).getVectorElementType();
235 EVT ExtVT = cast<VTSDNode>(N->getOperand(1))->getVT().getVectorElementType();
236 SDValue LHS = GetScalarizedVector(N->getOperand(0));
237 return DAG.getNode(N->getOpcode(), SDLoc(N), EltVT,
238 LHS, DAG.getValueType(ExtVT));
241 SDValue DAGTypeLegalizer::ScalarizeVecRes_SCALAR_TO_VECTOR(SDNode *N) {
242 // If the operand is wider than the vector element type then it is implicitly
243 // truncated. Make that explicit here.
244 EVT EltVT = N->getValueType(0).getVectorElementType();
245 SDValue InOp = N->getOperand(0);
246 if (InOp.getValueType() != EltVT)
247 return DAG.getNode(ISD::TRUNCATE, SDLoc(N), EltVT, InOp);
251 SDValue DAGTypeLegalizer::ScalarizeVecRes_VSELECT(SDNode *N) {
252 SDValue Cond = GetScalarizedVector(N->getOperand(0));
253 SDValue LHS = GetScalarizedVector(N->getOperand(1));
254 TargetLowering::BooleanContent ScalarBool = TLI.getBooleanContents(false);
255 TargetLowering::BooleanContent VecBool = TLI.getBooleanContents(true);
256 if (ScalarBool != VecBool) {
257 EVT CondVT = Cond.getValueType();
258 switch (ScalarBool) {
259 case TargetLowering::UndefinedBooleanContent:
261 case TargetLowering::ZeroOrOneBooleanContent:
262 assert(VecBool == TargetLowering::UndefinedBooleanContent ||
263 VecBool == TargetLowering::ZeroOrNegativeOneBooleanContent);
264 // Vector read from all ones, scalar expects a single 1 so mask.
265 Cond = DAG.getNode(ISD::AND, SDLoc(N), CondVT,
266 Cond, DAG.getConstant(1, CondVT));
268 case TargetLowering::ZeroOrNegativeOneBooleanContent:
269 assert(VecBool == TargetLowering::UndefinedBooleanContent ||
270 VecBool == TargetLowering::ZeroOrOneBooleanContent);
271 // Vector reads from a one, scalar from all ones so sign extend.
272 Cond = DAG.getNode(ISD::SIGN_EXTEND_INREG, SDLoc(N), CondVT,
273 Cond, DAG.getValueType(MVT::i1));
278 return DAG.getSelect(SDLoc(N),
279 LHS.getValueType(), Cond, LHS,
280 GetScalarizedVector(N->getOperand(2)));
283 SDValue DAGTypeLegalizer::ScalarizeVecRes_SELECT(SDNode *N) {
284 SDValue LHS = GetScalarizedVector(N->getOperand(1));
285 return DAG.getSelect(SDLoc(N),
286 LHS.getValueType(), N->getOperand(0), LHS,
287 GetScalarizedVector(N->getOperand(2)));
290 SDValue DAGTypeLegalizer::ScalarizeVecRes_SELECT_CC(SDNode *N) {
291 SDValue LHS = GetScalarizedVector(N->getOperand(2));
292 return DAG.getNode(ISD::SELECT_CC, SDLoc(N), LHS.getValueType(),
293 N->getOperand(0), N->getOperand(1),
294 LHS, GetScalarizedVector(N->getOperand(3)),
298 SDValue DAGTypeLegalizer::ScalarizeVecRes_SETCC(SDNode *N) {
299 assert(N->getValueType(0).isVector() ==
300 N->getOperand(0).getValueType().isVector() &&
301 "Scalar/Vector type mismatch");
303 if (N->getValueType(0).isVector()) return ScalarizeVecRes_VSETCC(N);
305 SDValue LHS = GetScalarizedVector(N->getOperand(0));
306 SDValue RHS = GetScalarizedVector(N->getOperand(1));
309 // Turn it into a scalar SETCC.
310 return DAG.getNode(ISD::SETCC, DL, MVT::i1, LHS, RHS, N->getOperand(2));
313 SDValue DAGTypeLegalizer::ScalarizeVecRes_UNDEF(SDNode *N) {
314 return DAG.getUNDEF(N->getValueType(0).getVectorElementType());
317 SDValue DAGTypeLegalizer::ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N) {
318 // Figure out if the scalar is the LHS or RHS and return it.
319 SDValue Arg = N->getOperand(2).getOperand(0);
320 if (Arg.getOpcode() == ISD::UNDEF)
321 return DAG.getUNDEF(N->getValueType(0).getVectorElementType());
322 unsigned Op = !cast<ConstantSDNode>(Arg)->isNullValue();
323 return GetScalarizedVector(N->getOperand(Op));
326 SDValue DAGTypeLegalizer::ScalarizeVecRes_VSETCC(SDNode *N) {
327 assert(N->getValueType(0).isVector() &&
328 N->getOperand(0).getValueType().isVector() &&
329 "Operand types must be vectors");
331 SDValue LHS = GetScalarizedVector(N->getOperand(0));
332 SDValue RHS = GetScalarizedVector(N->getOperand(1));
333 EVT NVT = N->getValueType(0).getVectorElementType();
336 // Turn it into a scalar SETCC.
337 SDValue Res = DAG.getNode(ISD::SETCC, DL, MVT::i1, LHS, RHS,
339 // Vectors may have a different boolean contents to scalars. Promote the
340 // value appropriately.
341 ISD::NodeType ExtendCode =
342 TargetLowering::getExtendForContent(TLI.getBooleanContents(true));
343 return DAG.getNode(ExtendCode, DL, NVT, Res);
347 //===----------------------------------------------------------------------===//
348 // Operand Vector Scalarization <1 x ty> -> ty.
349 //===----------------------------------------------------------------------===//
351 bool DAGTypeLegalizer::ScalarizeVectorOperand(SDNode *N, unsigned OpNo) {
352 DEBUG(dbgs() << "Scalarize node operand " << OpNo << ": ";
355 SDValue Res = SDValue();
357 if (Res.getNode() == 0) {
358 switch (N->getOpcode()) {
361 dbgs() << "ScalarizeVectorOperand Op #" << OpNo << ": ";
365 llvm_unreachable("Do not know how to scalarize this operator's operand!");
367 Res = ScalarizeVecOp_BITCAST(N);
369 case ISD::ANY_EXTEND:
370 case ISD::ZERO_EXTEND:
371 case ISD::SIGN_EXTEND:
372 Res = ScalarizeVecOp_EXTEND(N);
374 case ISD::CONCAT_VECTORS:
375 Res = ScalarizeVecOp_CONCAT_VECTORS(N);
377 case ISD::EXTRACT_VECTOR_ELT:
378 Res = ScalarizeVecOp_EXTRACT_VECTOR_ELT(N);
381 Res = ScalarizeVecOp_STORE(cast<StoreSDNode>(N), OpNo);
386 // If the result is null, the sub-method took care of registering results etc.
387 if (!Res.getNode()) return false;
389 // If the result is N, the sub-method updated N in place. Tell the legalizer
391 if (Res.getNode() == N)
394 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
395 "Invalid operand expansion");
397 ReplaceValueWith(SDValue(N, 0), Res);
401 /// ScalarizeVecOp_BITCAST - If the value to convert is a vector that needs
402 /// to be scalarized, it must be <1 x ty>. Convert the element instead.
403 SDValue DAGTypeLegalizer::ScalarizeVecOp_BITCAST(SDNode *N) {
404 SDValue Elt = GetScalarizedVector(N->getOperand(0));
405 return DAG.getNode(ISD::BITCAST, SDLoc(N),
406 N->getValueType(0), Elt);
409 /// ScalarizeVecOp_EXTEND - If the value to extend is a vector that needs
410 /// to be scalarized, it must be <1 x ty>. Extend the element instead.
411 SDValue DAGTypeLegalizer::ScalarizeVecOp_EXTEND(SDNode *N) {
412 assert(N->getValueType(0).getVectorNumElements() == 1 &&
413 "Unexected vector type!");
414 SDValue Elt = GetScalarizedVector(N->getOperand(0));
415 SmallVector<SDValue, 1> Ops(1);
416 Ops[0] = DAG.getNode(N->getOpcode(), SDLoc(N),
417 N->getValueType(0).getScalarType(), Elt);
418 // Revectorize the result so the types line up with what the uses of this
419 // expression expect.
420 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(N), N->getValueType(0),
424 /// ScalarizeVecOp_CONCAT_VECTORS - The vectors to concatenate have length one -
425 /// use a BUILD_VECTOR instead.
426 SDValue DAGTypeLegalizer::ScalarizeVecOp_CONCAT_VECTORS(SDNode *N) {
427 SmallVector<SDValue, 8> Ops(N->getNumOperands());
428 for (unsigned i = 0, e = N->getNumOperands(); i < e; ++i)
429 Ops[i] = GetScalarizedVector(N->getOperand(i));
430 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(N), N->getValueType(0),
431 &Ops[0], Ops.size());
434 /// ScalarizeVecOp_EXTRACT_VECTOR_ELT - If the input is a vector that needs to
435 /// be scalarized, it must be <1 x ty>, so just return the element, ignoring the
437 SDValue DAGTypeLegalizer::ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N) {
438 SDValue Res = GetScalarizedVector(N->getOperand(0));
439 if (Res.getValueType() != N->getValueType(0))
440 Res = DAG.getNode(ISD::ANY_EXTEND, SDLoc(N), N->getValueType(0),
445 /// ScalarizeVecOp_STORE - If the value to store is a vector that needs to be
446 /// scalarized, it must be <1 x ty>. Just store the element.
447 SDValue DAGTypeLegalizer::ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo){
448 assert(N->isUnindexed() && "Indexed store of one-element vector?");
449 assert(OpNo == 1 && "Do not know how to scalarize this operand!");
452 if (N->isTruncatingStore())
453 return DAG.getTruncStore(N->getChain(), dl,
454 GetScalarizedVector(N->getOperand(1)),
455 N->getBasePtr(), N->getPointerInfo(),
456 N->getMemoryVT().getVectorElementType(),
457 N->isVolatile(), N->isNonTemporal(),
460 return DAG.getStore(N->getChain(), dl, GetScalarizedVector(N->getOperand(1)),
461 N->getBasePtr(), N->getPointerInfo(),
462 N->isVolatile(), N->isNonTemporal(),
463 N->getOriginalAlignment());
467 //===----------------------------------------------------------------------===//
468 // Result Vector Splitting
469 //===----------------------------------------------------------------------===//
471 /// SplitVectorResult - This method is called when the specified result of the
472 /// specified node is found to need vector splitting. At this point, the node
473 /// may also have invalid operands or may have other results that need
474 /// legalization, we just know that (at least) one result needs vector
476 void DAGTypeLegalizer::SplitVectorResult(SDNode *N, unsigned ResNo) {
477 DEBUG(dbgs() << "Split node result: ";
482 // See if the target wants to custom expand this node.
483 if (CustomLowerNode(N, N->getValueType(ResNo), true))
486 switch (N->getOpcode()) {
489 dbgs() << "SplitVectorResult #" << ResNo << ": ";
493 report_fatal_error("Do not know how to split the result of this "
496 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
498 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
499 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
500 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
501 case ISD::BITCAST: SplitVecRes_BITCAST(N, Lo, Hi); break;
502 case ISD::BUILD_VECTOR: SplitVecRes_BUILD_VECTOR(N, Lo, Hi); break;
503 case ISD::CONCAT_VECTORS: SplitVecRes_CONCAT_VECTORS(N, Lo, Hi); break;
504 case ISD::EXTRACT_SUBVECTOR: SplitVecRes_EXTRACT_SUBVECTOR(N, Lo, Hi); break;
505 case ISD::FP_ROUND_INREG: SplitVecRes_InregOp(N, Lo, Hi); break;
506 case ISD::FPOWI: SplitVecRes_FPOWI(N, Lo, Hi); break;
507 case ISD::INSERT_VECTOR_ELT: SplitVecRes_INSERT_VECTOR_ELT(N, Lo, Hi); break;
508 case ISD::SCALAR_TO_VECTOR: SplitVecRes_SCALAR_TO_VECTOR(N, Lo, Hi); break;
509 case ISD::SIGN_EXTEND_INREG: SplitVecRes_InregOp(N, Lo, Hi); break;
511 SplitVecRes_LOAD(cast<LoadSDNode>(N), Lo, Hi);
514 SplitVecRes_SETCC(N, Lo, Hi);
516 case ISD::VECTOR_SHUFFLE:
517 SplitVecRes_VECTOR_SHUFFLE(cast<ShuffleVectorSDNode>(N), Lo, Hi);
520 case ISD::ANY_EXTEND:
521 case ISD::CONVERT_RNDSAT:
524 case ISD::CTLZ_ZERO_UNDEF:
525 case ISD::CTTZ_ZERO_UNDEF:
536 case ISD::FNEARBYINT:
540 case ISD::FP_TO_SINT:
541 case ISD::FP_TO_UINT:
546 case ISD::SIGN_EXTEND:
547 case ISD::SINT_TO_FP:
549 case ISD::UINT_TO_FP:
550 case ISD::ZERO_EXTEND:
551 SplitVecRes_UnaryOp(N, Lo, Hi);
573 SplitVecRes_BinOp(N, Lo, Hi);
576 SplitVecRes_TernaryOp(N, Lo, Hi);
580 // If Lo/Hi is null, the sub-method took care of registering results etc.
582 SetSplitVector(SDValue(N, ResNo), Lo, Hi);
585 void DAGTypeLegalizer::SplitVecRes_BinOp(SDNode *N, SDValue &Lo,
587 SDValue LHSLo, LHSHi;
588 GetSplitVector(N->getOperand(0), LHSLo, LHSHi);
589 SDValue RHSLo, RHSHi;
590 GetSplitVector(N->getOperand(1), RHSLo, RHSHi);
593 Lo = DAG.getNode(N->getOpcode(), dl, LHSLo.getValueType(), LHSLo, RHSLo);
594 Hi = DAG.getNode(N->getOpcode(), dl, LHSHi.getValueType(), LHSHi, RHSHi);
597 void DAGTypeLegalizer::SplitVecRes_TernaryOp(SDNode *N, SDValue &Lo,
599 SDValue Op0Lo, Op0Hi;
600 GetSplitVector(N->getOperand(0), Op0Lo, Op0Hi);
601 SDValue Op1Lo, Op1Hi;
602 GetSplitVector(N->getOperand(1), Op1Lo, Op1Hi);
603 SDValue Op2Lo, Op2Hi;
604 GetSplitVector(N->getOperand(2), Op2Lo, Op2Hi);
607 Lo = DAG.getNode(N->getOpcode(), dl, Op0Lo.getValueType(),
608 Op0Lo, Op1Lo, Op2Lo);
609 Hi = DAG.getNode(N->getOpcode(), dl, Op0Hi.getValueType(),
610 Op0Hi, Op1Hi, Op2Hi);
613 void DAGTypeLegalizer::SplitVecRes_BITCAST(SDNode *N, SDValue &Lo,
615 // We know the result is a vector. The input may be either a vector or a
618 GetSplitDestVTs(N->getValueType(0), LoVT, HiVT);
621 SDValue InOp = N->getOperand(0);
622 EVT InVT = InOp.getValueType();
624 // Handle some special cases efficiently.
625 switch (getTypeAction(InVT)) {
626 case TargetLowering::TypeLegal:
627 case TargetLowering::TypePromoteInteger:
628 case TargetLowering::TypeSoftenFloat:
629 case TargetLowering::TypeScalarizeVector:
630 case TargetLowering::TypeWidenVector:
632 case TargetLowering::TypeExpandInteger:
633 case TargetLowering::TypeExpandFloat:
634 // A scalar to vector conversion, where the scalar needs expansion.
635 // If the vector is being split in two then we can just convert the
638 GetExpandedOp(InOp, Lo, Hi);
639 if (TLI.isBigEndian())
641 Lo = DAG.getNode(ISD::BITCAST, dl, LoVT, Lo);
642 Hi = DAG.getNode(ISD::BITCAST, dl, HiVT, Hi);
646 case TargetLowering::TypeSplitVector:
647 // If the input is a vector that needs to be split, convert each split
648 // piece of the input now.
649 GetSplitVector(InOp, Lo, Hi);
650 Lo = DAG.getNode(ISD::BITCAST, dl, LoVT, Lo);
651 Hi = DAG.getNode(ISD::BITCAST, dl, HiVT, Hi);
655 // In the general case, convert the input to an integer and split it by hand.
656 EVT LoIntVT = EVT::getIntegerVT(*DAG.getContext(), LoVT.getSizeInBits());
657 EVT HiIntVT = EVT::getIntegerVT(*DAG.getContext(), HiVT.getSizeInBits());
658 if (TLI.isBigEndian())
659 std::swap(LoIntVT, HiIntVT);
661 SplitInteger(BitConvertToInteger(InOp), LoIntVT, HiIntVT, Lo, Hi);
663 if (TLI.isBigEndian())
665 Lo = DAG.getNode(ISD::BITCAST, dl, LoVT, Lo);
666 Hi = DAG.getNode(ISD::BITCAST, dl, HiVT, Hi);
669 void DAGTypeLegalizer::SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo,
673 GetSplitDestVTs(N->getValueType(0), LoVT, HiVT);
674 unsigned LoNumElts = LoVT.getVectorNumElements();
675 SmallVector<SDValue, 8> LoOps(N->op_begin(), N->op_begin()+LoNumElts);
676 Lo = DAG.getNode(ISD::BUILD_VECTOR, dl, LoVT, &LoOps[0], LoOps.size());
678 SmallVector<SDValue, 8> HiOps(N->op_begin()+LoNumElts, N->op_end());
679 Hi = DAG.getNode(ISD::BUILD_VECTOR, dl, HiVT, &HiOps[0], HiOps.size());
682 void DAGTypeLegalizer::SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo,
684 assert(!(N->getNumOperands() & 1) && "Unsupported CONCAT_VECTORS");
686 unsigned NumSubvectors = N->getNumOperands() / 2;
687 if (NumSubvectors == 1) {
688 Lo = N->getOperand(0);
689 Hi = N->getOperand(1);
694 GetSplitDestVTs(N->getValueType(0), LoVT, HiVT);
696 SmallVector<SDValue, 8> LoOps(N->op_begin(), N->op_begin()+NumSubvectors);
697 Lo = DAG.getNode(ISD::CONCAT_VECTORS, dl, LoVT, &LoOps[0], LoOps.size());
699 SmallVector<SDValue, 8> HiOps(N->op_begin()+NumSubvectors, N->op_end());
700 Hi = DAG.getNode(ISD::CONCAT_VECTORS, dl, HiVT, &HiOps[0], HiOps.size());
703 void DAGTypeLegalizer::SplitVecRes_EXTRACT_SUBVECTOR(SDNode *N, SDValue &Lo,
705 SDValue Vec = N->getOperand(0);
706 SDValue Idx = N->getOperand(1);
710 GetSplitDestVTs(N->getValueType(0), LoVT, HiVT);
712 Lo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, LoVT, Vec, Idx);
713 uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
714 Hi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, HiVT, Vec,
715 DAG.getIntPtrConstant(IdxVal + LoVT.getVectorNumElements()));
718 void DAGTypeLegalizer::SplitVecRes_FPOWI(SDNode *N, SDValue &Lo,
721 GetSplitVector(N->getOperand(0), Lo, Hi);
722 Lo = DAG.getNode(ISD::FPOWI, dl, Lo.getValueType(), Lo, N->getOperand(1));
723 Hi = DAG.getNode(ISD::FPOWI, dl, Hi.getValueType(), Hi, N->getOperand(1));
726 void DAGTypeLegalizer::SplitVecRes_InregOp(SDNode *N, SDValue &Lo,
728 SDValue LHSLo, LHSHi;
729 GetSplitVector(N->getOperand(0), LHSLo, LHSHi);
733 GetSplitDestVTs(cast<VTSDNode>(N->getOperand(1))->getVT(), LoVT, HiVT);
735 Lo = DAG.getNode(N->getOpcode(), dl, LHSLo.getValueType(), LHSLo,
736 DAG.getValueType(LoVT));
737 Hi = DAG.getNode(N->getOpcode(), dl, LHSHi.getValueType(), LHSHi,
738 DAG.getValueType(HiVT));
741 void DAGTypeLegalizer::SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo,
743 SDValue Vec = N->getOperand(0);
744 SDValue Elt = N->getOperand(1);
745 SDValue Idx = N->getOperand(2);
747 GetSplitVector(Vec, Lo, Hi);
749 if (ConstantSDNode *CIdx = dyn_cast<ConstantSDNode>(Idx)) {
750 unsigned IdxVal = CIdx->getZExtValue();
751 unsigned LoNumElts = Lo.getValueType().getVectorNumElements();
752 if (IdxVal < LoNumElts)
753 Lo = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
754 Lo.getValueType(), Lo, Elt, Idx);
756 Hi = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, Hi.getValueType(), Hi, Elt,
757 DAG.getIntPtrConstant(IdxVal - LoNumElts));
761 // Spill the vector to the stack.
762 EVT VecVT = Vec.getValueType();
763 EVT EltVT = VecVT.getVectorElementType();
764 SDValue StackPtr = DAG.CreateStackTemporary(VecVT);
765 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Vec, StackPtr,
766 MachinePointerInfo(), false, false, 0);
768 // Store the new element. This may be larger than the vector element type,
769 // so use a truncating store.
770 SDValue EltPtr = GetVectorElementPointer(StackPtr, EltVT, Idx);
771 Type *VecType = VecVT.getTypeForEVT(*DAG.getContext());
773 TLI.getDataLayout()->getPrefTypeAlignment(VecType);
774 Store = DAG.getTruncStore(Store, dl, Elt, EltPtr, MachinePointerInfo(), EltVT,
777 // Load the Lo part from the stack slot.
778 Lo = DAG.getLoad(Lo.getValueType(), dl, Store, StackPtr, MachinePointerInfo(),
779 false, false, false, 0);
781 // Increment the pointer to the other part.
782 unsigned IncrementSize = Lo.getValueType().getSizeInBits() / 8;
783 StackPtr = DAG.getNode(ISD::ADD, dl, StackPtr.getValueType(), StackPtr,
784 DAG.getIntPtrConstant(IncrementSize));
786 // Load the Hi part from the stack slot.
787 Hi = DAG.getLoad(Hi.getValueType(), dl, Store, StackPtr, MachinePointerInfo(),
788 false, false, false, MinAlign(Alignment, IncrementSize));
791 void DAGTypeLegalizer::SplitVecRes_SCALAR_TO_VECTOR(SDNode *N, SDValue &Lo,
795 GetSplitDestVTs(N->getValueType(0), LoVT, HiVT);
796 Lo = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, LoVT, N->getOperand(0));
797 Hi = DAG.getUNDEF(HiVT);
800 void DAGTypeLegalizer::SplitVecRes_LOAD(LoadSDNode *LD, SDValue &Lo,
802 assert(ISD::isUNINDEXEDLoad(LD) && "Indexed load during type legalization!");
805 GetSplitDestVTs(LD->getValueType(0), LoVT, HiVT);
807 ISD::LoadExtType ExtType = LD->getExtensionType();
808 SDValue Ch = LD->getChain();
809 SDValue Ptr = LD->getBasePtr();
810 SDValue Offset = DAG.getUNDEF(Ptr.getValueType());
811 EVT MemoryVT = LD->getMemoryVT();
812 unsigned Alignment = LD->getOriginalAlignment();
813 bool isVolatile = LD->isVolatile();
814 bool isNonTemporal = LD->isNonTemporal();
815 bool isInvariant = LD->isInvariant();
817 EVT LoMemVT, HiMemVT;
818 GetSplitDestVTs(MemoryVT, LoMemVT, HiMemVT);
820 Lo = DAG.getLoad(ISD::UNINDEXED, ExtType, LoVT, dl, Ch, Ptr, Offset,
821 LD->getPointerInfo(), LoMemVT, isVolatile, isNonTemporal,
822 isInvariant, Alignment);
824 unsigned IncrementSize = LoMemVT.getSizeInBits()/8;
825 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
826 DAG.getIntPtrConstant(IncrementSize));
827 Hi = DAG.getLoad(ISD::UNINDEXED, ExtType, HiVT, dl, Ch, Ptr, Offset,
828 LD->getPointerInfo().getWithOffset(IncrementSize),
829 HiMemVT, isVolatile, isNonTemporal, isInvariant, Alignment);
831 // Build a factor node to remember that this load is independent of the
833 Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
836 // Legalized the chain result - switch anything that used the old chain to
838 ReplaceValueWith(SDValue(LD, 1), Ch);
841 void DAGTypeLegalizer::SplitVecRes_SETCC(SDNode *N, SDValue &Lo, SDValue &Hi) {
842 assert(N->getValueType(0).isVector() &&
843 N->getOperand(0).getValueType().isVector() &&
844 "Operand types must be vectors");
848 GetSplitDestVTs(N->getValueType(0), LoVT, HiVT);
851 EVT InVT = N->getOperand(0).getValueType();
852 SDValue LL, LH, RL, RH;
853 EVT InNVT = EVT::getVectorVT(*DAG.getContext(), InVT.getVectorElementType(),
854 LoVT.getVectorNumElements());
855 LL = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InNVT, N->getOperand(0),
856 DAG.getIntPtrConstant(0));
857 LH = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InNVT, N->getOperand(0),
858 DAG.getIntPtrConstant(InNVT.getVectorNumElements()));
860 RL = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InNVT, N->getOperand(1),
861 DAG.getIntPtrConstant(0));
862 RH = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InNVT, N->getOperand(1),
863 DAG.getIntPtrConstant(InNVT.getVectorNumElements()));
865 Lo = DAG.getNode(N->getOpcode(), DL, LoVT, LL, RL, N->getOperand(2));
866 Hi = DAG.getNode(N->getOpcode(), DL, HiVT, LH, RH, N->getOperand(2));
869 void DAGTypeLegalizer::SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo,
871 // Get the dest types - they may not match the input types, e.g. int_to_fp.
874 GetSplitDestVTs(N->getValueType(0), LoVT, HiVT);
876 // If the input also splits, handle it directly for a compile time speedup.
877 // Otherwise split it by hand.
878 EVT InVT = N->getOperand(0).getValueType();
879 if (getTypeAction(InVT) == TargetLowering::TypeSplitVector) {
880 GetSplitVector(N->getOperand(0), Lo, Hi);
882 EVT InNVT = EVT::getVectorVT(*DAG.getContext(), InVT.getVectorElementType(),
883 LoVT.getVectorNumElements());
884 Lo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, InNVT, N->getOperand(0),
885 DAG.getIntPtrConstant(0));
886 Hi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, InNVT, N->getOperand(0),
887 DAG.getIntPtrConstant(InNVT.getVectorNumElements()));
890 if (N->getOpcode() == ISD::FP_ROUND) {
891 Lo = DAG.getNode(N->getOpcode(), dl, LoVT, Lo, N->getOperand(1));
892 Hi = DAG.getNode(N->getOpcode(), dl, HiVT, Hi, N->getOperand(1));
893 } else if (N->getOpcode() == ISD::CONVERT_RNDSAT) {
894 SDValue DTyOpLo = DAG.getValueType(LoVT);
895 SDValue DTyOpHi = DAG.getValueType(HiVT);
896 SDValue STyOpLo = DAG.getValueType(Lo.getValueType());
897 SDValue STyOpHi = DAG.getValueType(Hi.getValueType());
898 SDValue RndOp = N->getOperand(3);
899 SDValue SatOp = N->getOperand(4);
900 ISD::CvtCode CvtCode = cast<CvtRndSatSDNode>(N)->getCvtCode();
901 Lo = DAG.getConvertRndSat(LoVT, dl, Lo, DTyOpLo, STyOpLo, RndOp, SatOp,
903 Hi = DAG.getConvertRndSat(HiVT, dl, Hi, DTyOpHi, STyOpHi, RndOp, SatOp,
906 Lo = DAG.getNode(N->getOpcode(), dl, LoVT, Lo);
907 Hi = DAG.getNode(N->getOpcode(), dl, HiVT, Hi);
911 void DAGTypeLegalizer::SplitVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N,
912 SDValue &Lo, SDValue &Hi) {
913 // The low and high parts of the original input give four input vectors.
916 GetSplitVector(N->getOperand(0), Inputs[0], Inputs[1]);
917 GetSplitVector(N->getOperand(1), Inputs[2], Inputs[3]);
918 EVT NewVT = Inputs[0].getValueType();
919 unsigned NewElts = NewVT.getVectorNumElements();
921 // If Lo or Hi uses elements from at most two of the four input vectors, then
922 // express it as a vector shuffle of those two inputs. Otherwise extract the
923 // input elements by hand and construct the Lo/Hi output using a BUILD_VECTOR.
924 SmallVector<int, 16> Ops;
925 for (unsigned High = 0; High < 2; ++High) {
926 SDValue &Output = High ? Hi : Lo;
928 // Build a shuffle mask for the output, discovering on the fly which
929 // input vectors to use as shuffle operands (recorded in InputUsed).
930 // If building a suitable shuffle vector proves too hard, then bail
931 // out with useBuildVector set.
932 unsigned InputUsed[2] = { -1U, -1U }; // Not yet discovered.
933 unsigned FirstMaskIdx = High * NewElts;
934 bool useBuildVector = false;
935 for (unsigned MaskOffset = 0; MaskOffset < NewElts; ++MaskOffset) {
936 // The mask element. This indexes into the input.
937 int Idx = N->getMaskElt(FirstMaskIdx + MaskOffset);
939 // The input vector this mask element indexes into.
940 unsigned Input = (unsigned)Idx / NewElts;
942 if (Input >= array_lengthof(Inputs)) {
943 // The mask element does not index into any input vector.
948 // Turn the index into an offset from the start of the input vector.
949 Idx -= Input * NewElts;
951 // Find or create a shuffle vector operand to hold this input.
953 for (OpNo = 0; OpNo < array_lengthof(InputUsed); ++OpNo) {
954 if (InputUsed[OpNo] == Input) {
955 // This input vector is already an operand.
957 } else if (InputUsed[OpNo] == -1U) {
958 // Create a new operand for this input vector.
959 InputUsed[OpNo] = Input;
964 if (OpNo >= array_lengthof(InputUsed)) {
965 // More than two input vectors used! Give up on trying to create a
966 // shuffle vector. Insert all elements into a BUILD_VECTOR instead.
967 useBuildVector = true;
971 // Add the mask index for the new shuffle vector.
972 Ops.push_back(Idx + OpNo * NewElts);
975 if (useBuildVector) {
976 EVT EltVT = NewVT.getVectorElementType();
977 SmallVector<SDValue, 16> SVOps;
979 // Extract the input elements by hand.
980 for (unsigned MaskOffset = 0; MaskOffset < NewElts; ++MaskOffset) {
981 // The mask element. This indexes into the input.
982 int Idx = N->getMaskElt(FirstMaskIdx + MaskOffset);
984 // The input vector this mask element indexes into.
985 unsigned Input = (unsigned)Idx / NewElts;
987 if (Input >= array_lengthof(Inputs)) {
988 // The mask element is "undef" or indexes off the end of the input.
989 SVOps.push_back(DAG.getUNDEF(EltVT));
993 // Turn the index into an offset from the start of the input vector.
994 Idx -= Input * NewElts;
996 // Extract the vector element by hand.
997 SVOps.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
998 Inputs[Input], DAG.getIntPtrConstant(Idx)));
1001 // Construct the Lo/Hi output using a BUILD_VECTOR.
1002 Output = DAG.getNode(ISD::BUILD_VECTOR,dl,NewVT, &SVOps[0], SVOps.size());
1003 } else if (InputUsed[0] == -1U) {
1004 // No input vectors were used! The result is undefined.
1005 Output = DAG.getUNDEF(NewVT);
1007 SDValue Op0 = Inputs[InputUsed[0]];
1008 // If only one input was used, use an undefined vector for the other.
1009 SDValue Op1 = InputUsed[1] == -1U ?
1010 DAG.getUNDEF(NewVT) : Inputs[InputUsed[1]];
1011 // At least one input vector was used. Create a new shuffle vector.
1012 Output = DAG.getVectorShuffle(NewVT, dl, Op0, Op1, &Ops[0]);
1020 //===----------------------------------------------------------------------===//
1021 // Operand Vector Splitting
1022 //===----------------------------------------------------------------------===//
1024 /// SplitVectorOperand - This method is called when the specified operand of the
1025 /// specified node is found to need vector splitting. At this point, all of the
1026 /// result types of the node are known to be legal, but other operands of the
1027 /// node may need legalization as well as the specified one.
1028 bool DAGTypeLegalizer::SplitVectorOperand(SDNode *N, unsigned OpNo) {
1029 DEBUG(dbgs() << "Split node operand: ";
1032 SDValue Res = SDValue();
1034 // See if the target wants to custom split this node.
1035 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
1038 if (Res.getNode() == 0) {
1039 switch (N->getOpcode()) {
1042 dbgs() << "SplitVectorOperand Op #" << OpNo << ": ";
1046 report_fatal_error("Do not know how to split this operator's "
1049 case ISD::SETCC: Res = SplitVecOp_VSETCC(N); break;
1050 case ISD::BITCAST: Res = SplitVecOp_BITCAST(N); break;
1051 case ISD::EXTRACT_SUBVECTOR: Res = SplitVecOp_EXTRACT_SUBVECTOR(N); break;
1052 case ISD::EXTRACT_VECTOR_ELT:Res = SplitVecOp_EXTRACT_VECTOR_ELT(N); break;
1053 case ISD::CONCAT_VECTORS: Res = SplitVecOp_CONCAT_VECTORS(N); break;
1054 case ISD::TRUNCATE: Res = SplitVecOp_TRUNCATE(N); break;
1055 case ISD::FP_ROUND: Res = SplitVecOp_FP_ROUND(N); break;
1057 Res = SplitVecOp_STORE(cast<StoreSDNode>(N), OpNo);
1060 Res = SplitVecOp_VSELECT(N, OpNo);
1065 case ISD::FP_EXTEND:
1066 case ISD::FP_TO_SINT:
1067 case ISD::FP_TO_UINT:
1068 case ISD::SINT_TO_FP:
1069 case ISD::UINT_TO_FP:
1071 case ISD::SIGN_EXTEND:
1072 case ISD::ZERO_EXTEND:
1073 case ISD::ANY_EXTEND:
1074 Res = SplitVecOp_UnaryOp(N);
1079 // If the result is null, the sub-method took care of registering results etc.
1080 if (!Res.getNode()) return false;
1082 // If the result is N, the sub-method updated N in place. Tell the legalizer
1084 if (Res.getNode() == N)
1087 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1088 "Invalid operand expansion");
1090 ReplaceValueWith(SDValue(N, 0), Res);
1094 SDValue DAGTypeLegalizer::SplitVecOp_VSELECT(SDNode *N, unsigned OpNo) {
1095 // The only possibility for an illegal operand is the mask, since result type
1096 // legalization would have handled this node already otherwise.
1097 assert(OpNo == 0 && "Illegal operand must be mask");
1099 SDValue Mask = N->getOperand(0);
1100 SDValue Src0 = N->getOperand(1);
1101 SDValue Src1 = N->getOperand(2);
1103 EVT MaskVT = Mask.getValueType();
1104 assert(MaskVT.isVector() && "VSELECT without a vector mask?");
1107 GetSplitVector(N->getOperand(0), Lo, Hi);
1108 assert(Lo.getValueType() == Hi.getValueType() &&
1109 "Lo and Hi have differing types");
1111 unsigned LoNumElts = Lo.getValueType().getVectorNumElements();
1112 unsigned HiNumElts = Hi.getValueType().getVectorNumElements();
1113 assert(LoNumElts == HiNumElts && "Asymmetric vector split?");
1115 LLVMContext &Ctx = *DAG.getContext();
1116 SDValue Zero = DAG.getIntPtrConstant(0);
1117 SDValue LoElts = DAG.getIntPtrConstant(LoNumElts);
1118 EVT Src0VT = Src0.getValueType();
1119 EVT Src0EltTy = Src0VT.getVectorElementType();
1120 EVT MaskEltTy = MaskVT.getVectorElementType();
1122 EVT LoOpVT = EVT::getVectorVT(Ctx, Src0EltTy, LoNumElts);
1123 EVT LoMaskVT = EVT::getVectorVT(Ctx, MaskEltTy, LoNumElts);
1124 EVT HiOpVT = EVT::getVectorVT(Ctx, Src0EltTy, HiNumElts);
1125 EVT HiMaskVT = EVT::getVectorVT(Ctx, MaskEltTy, HiNumElts);
1127 SDValue LoOp0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, LoOpVT, Src0, Zero);
1128 SDValue LoOp1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, LoOpVT, Src1, Zero);
1130 SDValue HiOp0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, HiOpVT, Src0, LoElts);
1131 SDValue HiOp1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, HiOpVT, Src1, LoElts);
1134 DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, LoMaskVT, Mask, Zero);
1136 DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, HiMaskVT, Mask, LoElts);
1139 DAG.getNode(ISD::VSELECT, DL, LoOpVT, LoMask, LoOp0, LoOp1);
1141 DAG.getNode(ISD::VSELECT, DL, HiOpVT, HiMask, HiOp0, HiOp1);
1143 return DAG.getNode(ISD::CONCAT_VECTORS, DL, Src0VT, LoSelect, HiSelect);
1146 SDValue DAGTypeLegalizer::SplitVecOp_UnaryOp(SDNode *N) {
1147 // The result has a legal vector type, but the input needs splitting.
1148 EVT ResVT = N->getValueType(0);
1151 GetSplitVector(N->getOperand(0), Lo, Hi);
1152 EVT InVT = Lo.getValueType();
1154 EVT OutVT = EVT::getVectorVT(*DAG.getContext(), ResVT.getVectorElementType(),
1155 InVT.getVectorNumElements());
1157 Lo = DAG.getNode(N->getOpcode(), dl, OutVT, Lo);
1158 Hi = DAG.getNode(N->getOpcode(), dl, OutVT, Hi);
1160 return DAG.getNode(ISD::CONCAT_VECTORS, dl, ResVT, Lo, Hi);
1163 SDValue DAGTypeLegalizer::SplitVecOp_BITCAST(SDNode *N) {
1164 // For example, i64 = BITCAST v4i16 on alpha. Typically the vector will
1165 // end up being split all the way down to individual components. Convert the
1166 // split pieces into integers and reassemble.
1168 GetSplitVector(N->getOperand(0), Lo, Hi);
1169 Lo = BitConvertToInteger(Lo);
1170 Hi = BitConvertToInteger(Hi);
1172 if (TLI.isBigEndian())
1175 return DAG.getNode(ISD::BITCAST, SDLoc(N), N->getValueType(0),
1176 JoinIntegers(Lo, Hi));
1179 SDValue DAGTypeLegalizer::SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N) {
1180 // We know that the extracted result type is legal.
1181 EVT SubVT = N->getValueType(0);
1182 SDValue Idx = N->getOperand(1);
1185 GetSplitVector(N->getOperand(0), Lo, Hi);
1187 uint64_t LoElts = Lo.getValueType().getVectorNumElements();
1188 uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
1190 if (IdxVal < LoElts) {
1191 assert(IdxVal + SubVT.getVectorNumElements() <= LoElts &&
1192 "Extracted subvector crosses vector split!");
1193 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, SubVT, Lo, Idx);
1195 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, SubVT, Hi,
1196 DAG.getConstant(IdxVal - LoElts, Idx.getValueType()));
1200 SDValue DAGTypeLegalizer::SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N) {
1201 SDValue Vec = N->getOperand(0);
1202 SDValue Idx = N->getOperand(1);
1203 EVT VecVT = Vec.getValueType();
1205 if (isa<ConstantSDNode>(Idx)) {
1206 uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
1207 assert(IdxVal < VecVT.getVectorNumElements() && "Invalid vector index!");
1210 GetSplitVector(Vec, Lo, Hi);
1212 uint64_t LoElts = Lo.getValueType().getVectorNumElements();
1214 if (IdxVal < LoElts)
1215 return SDValue(DAG.UpdateNodeOperands(N, Lo, Idx), 0);
1216 return SDValue(DAG.UpdateNodeOperands(N, Hi,
1217 DAG.getConstant(IdxVal - LoElts,
1218 Idx.getValueType())), 0);
1221 // Store the vector to the stack.
1222 EVT EltVT = VecVT.getVectorElementType();
1224 SDValue StackPtr = DAG.CreateStackTemporary(VecVT);
1225 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Vec, StackPtr,
1226 MachinePointerInfo(), false, false, 0);
1228 // Load back the required element.
1229 StackPtr = GetVectorElementPointer(StackPtr, EltVT, Idx);
1230 return DAG.getExtLoad(ISD::EXTLOAD, dl, N->getValueType(0), Store, StackPtr,
1231 MachinePointerInfo(), EltVT, false, false, 0);
1234 SDValue DAGTypeLegalizer::SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo) {
1235 assert(N->isUnindexed() && "Indexed store of vector?");
1236 assert(OpNo == 1 && "Can only split the stored value");
1239 bool isTruncating = N->isTruncatingStore();
1240 SDValue Ch = N->getChain();
1241 SDValue Ptr = N->getBasePtr();
1242 EVT MemoryVT = N->getMemoryVT();
1243 unsigned Alignment = N->getOriginalAlignment();
1244 bool isVol = N->isVolatile();
1245 bool isNT = N->isNonTemporal();
1247 GetSplitVector(N->getOperand(1), Lo, Hi);
1249 EVT LoMemVT, HiMemVT;
1250 GetSplitDestVTs(MemoryVT, LoMemVT, HiMemVT);
1252 unsigned IncrementSize = LoMemVT.getSizeInBits()/8;
1255 Lo = DAG.getTruncStore(Ch, DL, Lo, Ptr, N->getPointerInfo(),
1256 LoMemVT, isVol, isNT, Alignment);
1258 Lo = DAG.getStore(Ch, DL, Lo, Ptr, N->getPointerInfo(),
1259 isVol, isNT, Alignment);
1261 // Increment the pointer to the other half.
1262 Ptr = DAG.getNode(ISD::ADD, DL, Ptr.getValueType(), Ptr,
1263 DAG.getIntPtrConstant(IncrementSize));
1266 Hi = DAG.getTruncStore(Ch, DL, Hi, Ptr,
1267 N->getPointerInfo().getWithOffset(IncrementSize),
1268 HiMemVT, isVol, isNT, Alignment);
1270 Hi = DAG.getStore(Ch, DL, Hi, Ptr,
1271 N->getPointerInfo().getWithOffset(IncrementSize),
1272 isVol, isNT, Alignment);
1274 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Lo, Hi);
1277 SDValue DAGTypeLegalizer::SplitVecOp_CONCAT_VECTORS(SDNode *N) {
1280 // The input operands all must have the same type, and we know the result
1281 // type is valid. Convert this to a buildvector which extracts all the
1283 // TODO: If the input elements are power-two vectors, we could convert this to
1284 // a new CONCAT_VECTORS node with elements that are half-wide.
1285 SmallVector<SDValue, 32> Elts;
1286 EVT EltVT = N->getValueType(0).getVectorElementType();
1287 for (unsigned op = 0, e = N->getNumOperands(); op != e; ++op) {
1288 SDValue Op = N->getOperand(op);
1289 for (unsigned i = 0, e = Op.getValueType().getVectorNumElements();
1291 Elts.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, EltVT,
1292 Op, DAG.getIntPtrConstant(i)));
1297 return DAG.getNode(ISD::BUILD_VECTOR, DL, N->getValueType(0),
1298 &Elts[0], Elts.size());
1301 SDValue DAGTypeLegalizer::SplitVecOp_TRUNCATE(SDNode *N) {
1302 // The result type is legal, but the input type is illegal. If splitting
1303 // ends up with the result type of each half still being legal, just
1304 // do that. If, however, that would result in an illegal result type,
1305 // we can try to get more clever with power-two vectors. Specifically,
1306 // split the input type, but also widen the result element size, then
1307 // concatenate the halves and truncate again. For example, consider a target
1308 // where v8i8 is legal and v8i32 is not (ARM, which doesn't have 256-bit
1309 // vectors). To perform a "%res = v8i8 trunc v8i32 %in" we do:
1310 // %inlo = v4i32 extract_subvector %in, 0
1311 // %inhi = v4i32 extract_subvector %in, 4
1312 // %lo16 = v4i16 trunc v4i32 %inlo
1313 // %hi16 = v4i16 trunc v4i32 %inhi
1314 // %in16 = v8i16 concat_vectors v4i16 %lo16, v4i16 %hi16
1315 // %res = v8i8 trunc v8i16 %in16
1317 // Without this transform, the original truncate would end up being
1318 // scalarized, which is pretty much always a last resort.
1319 SDValue InVec = N->getOperand(0);
1320 EVT InVT = InVec->getValueType(0);
1321 EVT OutVT = N->getValueType(0);
1322 unsigned NumElements = OutVT.getVectorNumElements();
1323 // Widening should have already made sure this is a power-two vector
1324 // if we're trying to split it at all. assert() that's true, just in case.
1325 assert(!(NumElements & 1) && "Splitting vector, but not in half!");
1327 unsigned InElementSize = InVT.getVectorElementType().getSizeInBits();
1328 unsigned OutElementSize = OutVT.getVectorElementType().getSizeInBits();
1330 // If the input elements are only 1/2 the width of the result elements,
1331 // just use the normal splitting. Our trick only work if there's room
1332 // to split more than once.
1333 if (InElementSize <= OutElementSize * 2)
1334 return SplitVecOp_UnaryOp(N);
1337 // Extract the halves of the input via extract_subvector.
1338 EVT SplitVT = EVT::getVectorVT(*DAG.getContext(),
1339 InVT.getVectorElementType(), NumElements/2);
1340 SDValue InLoVec = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SplitVT, InVec,
1341 DAG.getIntPtrConstant(0));
1342 SDValue InHiVec = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SplitVT, InVec,
1343 DAG.getIntPtrConstant(NumElements/2));
1344 // Truncate them to 1/2 the element size.
1345 EVT HalfElementVT = EVT::getIntegerVT(*DAG.getContext(), InElementSize/2);
1346 EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), HalfElementVT,
1348 SDValue HalfLo = DAG.getNode(ISD::TRUNCATE, DL, HalfVT, InLoVec);
1349 SDValue HalfHi = DAG.getNode(ISD::TRUNCATE, DL, HalfVT, InHiVec);
1350 // Concatenate them to get the full intermediate truncation result.
1351 EVT InterVT = EVT::getVectorVT(*DAG.getContext(), HalfElementVT, NumElements);
1352 SDValue InterVec = DAG.getNode(ISD::CONCAT_VECTORS, DL, InterVT, HalfLo,
1354 // Now finish up by truncating all the way down to the original result
1355 // type. This should normally be something that ends up being legal directly,
1356 // but in theory if a target has very wide vectors and an annoyingly
1357 // restricted set of legal types, this split can chain to build things up.
1358 return DAG.getNode(ISD::TRUNCATE, DL, OutVT, InterVec);
1361 SDValue DAGTypeLegalizer::SplitVecOp_VSETCC(SDNode *N) {
1362 assert(N->getValueType(0).isVector() &&
1363 N->getOperand(0).getValueType().isVector() &&
1364 "Operand types must be vectors");
1365 // The result has a legal vector type, but the input needs splitting.
1366 SDValue Lo0, Hi0, Lo1, Hi1, LoRes, HiRes;
1368 GetSplitVector(N->getOperand(0), Lo0, Hi0);
1369 GetSplitVector(N->getOperand(1), Lo1, Hi1);
1370 unsigned PartElements = Lo0.getValueType().getVectorNumElements();
1371 EVT PartResVT = EVT::getVectorVT(*DAG.getContext(), MVT::i1, PartElements);
1372 EVT WideResVT = EVT::getVectorVT(*DAG.getContext(), MVT::i1, 2*PartElements);
1374 LoRes = DAG.getNode(ISD::SETCC, DL, PartResVT, Lo0, Lo1, N->getOperand(2));
1375 HiRes = DAG.getNode(ISD::SETCC, DL, PartResVT, Hi0, Hi1, N->getOperand(2));
1376 SDValue Con = DAG.getNode(ISD::CONCAT_VECTORS, DL, WideResVT, LoRes, HiRes);
1377 return PromoteTargetBoolean(Con, N->getValueType(0));
1381 SDValue DAGTypeLegalizer::SplitVecOp_FP_ROUND(SDNode *N) {
1382 // The result has a legal vector type, but the input needs splitting.
1383 EVT ResVT = N->getValueType(0);
1386 GetSplitVector(N->getOperand(0), Lo, Hi);
1387 EVT InVT = Lo.getValueType();
1389 EVT OutVT = EVT::getVectorVT(*DAG.getContext(), ResVT.getVectorElementType(),
1390 InVT.getVectorNumElements());
1392 Lo = DAG.getNode(ISD::FP_ROUND, DL, OutVT, Lo, N->getOperand(1));
1393 Hi = DAG.getNode(ISD::FP_ROUND, DL, OutVT, Hi, N->getOperand(1));
1395 return DAG.getNode(ISD::CONCAT_VECTORS, DL, ResVT, Lo, Hi);
1400 //===----------------------------------------------------------------------===//
1401 // Result Vector Widening
1402 //===----------------------------------------------------------------------===//
1404 void DAGTypeLegalizer::WidenVectorResult(SDNode *N, unsigned ResNo) {
1405 DEBUG(dbgs() << "Widen node result " << ResNo << ": ";
1409 // See if the target wants to custom widen this node.
1410 if (CustomWidenLowerNode(N, N->getValueType(ResNo)))
1413 SDValue Res = SDValue();
1414 switch (N->getOpcode()) {
1417 dbgs() << "WidenVectorResult #" << ResNo << ": ";
1421 llvm_unreachable("Do not know how to widen the result of this operator!");
1423 case ISD::MERGE_VALUES: Res = WidenVecRes_MERGE_VALUES(N, ResNo); break;
1424 case ISD::BITCAST: Res = WidenVecRes_BITCAST(N); break;
1425 case ISD::BUILD_VECTOR: Res = WidenVecRes_BUILD_VECTOR(N); break;
1426 case ISD::CONCAT_VECTORS: Res = WidenVecRes_CONCAT_VECTORS(N); break;
1427 case ISD::CONVERT_RNDSAT: Res = WidenVecRes_CONVERT_RNDSAT(N); break;
1428 case ISD::EXTRACT_SUBVECTOR: Res = WidenVecRes_EXTRACT_SUBVECTOR(N); break;
1429 case ISD::FP_ROUND_INREG: Res = WidenVecRes_InregOp(N); break;
1430 case ISD::INSERT_VECTOR_ELT: Res = WidenVecRes_INSERT_VECTOR_ELT(N); break;
1431 case ISD::LOAD: Res = WidenVecRes_LOAD(N); break;
1432 case ISD::SCALAR_TO_VECTOR: Res = WidenVecRes_SCALAR_TO_VECTOR(N); break;
1433 case ISD::SIGN_EXTEND_INREG: Res = WidenVecRes_InregOp(N); break;
1435 case ISD::SELECT: Res = WidenVecRes_SELECT(N); break;
1436 case ISD::SELECT_CC: Res = WidenVecRes_SELECT_CC(N); break;
1437 case ISD::SETCC: Res = WidenVecRes_SETCC(N); break;
1438 case ISD::UNDEF: Res = WidenVecRes_UNDEF(N); break;
1439 case ISD::VECTOR_SHUFFLE:
1440 Res = WidenVecRes_VECTOR_SHUFFLE(cast<ShuffleVectorSDNode>(N));
1446 case ISD::FCOPYSIGN:
1462 Res = WidenVecRes_Binary(N);
1466 Res = WidenVecRes_POWI(N);
1472 Res = WidenVecRes_Shift(N);
1475 case ISD::ANY_EXTEND:
1476 case ISD::FP_EXTEND:
1478 case ISD::FP_TO_SINT:
1479 case ISD::FP_TO_UINT:
1480 case ISD::SIGN_EXTEND:
1481 case ISD::SINT_TO_FP:
1483 case ISD::UINT_TO_FP:
1484 case ISD::ZERO_EXTEND:
1485 Res = WidenVecRes_Convert(N);
1500 case ISD::FNEARBYINT:
1506 Res = WidenVecRes_Unary(N);
1509 Res = WidenVecRes_Ternary(N);
1513 // If Res is null, the sub-method took care of registering the result.
1515 SetWidenedVector(SDValue(N, ResNo), Res);
1518 SDValue DAGTypeLegalizer::WidenVecRes_Ternary(SDNode *N) {
1519 // Ternary op widening.
1521 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1522 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
1523 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
1524 SDValue InOp3 = GetWidenedVector(N->getOperand(2));
1525 return DAG.getNode(N->getOpcode(), dl, WidenVT, InOp1, InOp2, InOp3);
1528 SDValue DAGTypeLegalizer::WidenVecRes_Binary(SDNode *N) {
1529 // Binary op widening.
1530 unsigned Opcode = N->getOpcode();
1532 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1533 EVT WidenEltVT = WidenVT.getVectorElementType();
1535 unsigned NumElts = VT.getVectorNumElements();
1536 while (!TLI.isTypeLegal(VT) && NumElts != 1) {
1537 NumElts = NumElts / 2;
1538 VT = EVT::getVectorVT(*DAG.getContext(), WidenEltVT, NumElts);
1541 if (NumElts != 1 && !TLI.canOpTrap(N->getOpcode(), VT)) {
1542 // Operation doesn't trap so just widen as normal.
1543 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
1544 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
1545 return DAG.getNode(N->getOpcode(), dl, WidenVT, InOp1, InOp2);
1548 // No legal vector version so unroll the vector operation and then widen.
1550 return DAG.UnrollVectorOp(N, WidenVT.getVectorNumElements());
1552 // Since the operation can trap, apply operation on the original vector.
1554 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
1555 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
1556 unsigned CurNumElts = N->getValueType(0).getVectorNumElements();
1558 SmallVector<SDValue, 16> ConcatOps(CurNumElts);
1559 unsigned ConcatEnd = 0; // Current ConcatOps index.
1560 int Idx = 0; // Current Idx into input vectors.
1562 // NumElts := greatest legal vector size (at most WidenVT)
1563 // while (orig. vector has unhandled elements) {
1564 // take munches of size NumElts from the beginning and add to ConcatOps
1565 // NumElts := next smaller supported vector size or 1
1567 while (CurNumElts != 0) {
1568 while (CurNumElts >= NumElts) {
1569 SDValue EOp1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, InOp1,
1570 DAG.getIntPtrConstant(Idx));
1571 SDValue EOp2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, InOp2,
1572 DAG.getIntPtrConstant(Idx));
1573 ConcatOps[ConcatEnd++] = DAG.getNode(Opcode, dl, VT, EOp1, EOp2);
1575 CurNumElts -= NumElts;
1578 NumElts = NumElts / 2;
1579 VT = EVT::getVectorVT(*DAG.getContext(), WidenEltVT, NumElts);
1580 } while (!TLI.isTypeLegal(VT) && NumElts != 1);
1583 for (unsigned i = 0; i != CurNumElts; ++i, ++Idx) {
1584 SDValue EOp1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, WidenEltVT,
1585 InOp1, DAG.getIntPtrConstant(Idx));
1586 SDValue EOp2 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, WidenEltVT,
1587 InOp2, DAG.getIntPtrConstant(Idx));
1588 ConcatOps[ConcatEnd++] = DAG.getNode(Opcode, dl, WidenEltVT,
1595 // Check to see if we have a single operation with the widen type.
1596 if (ConcatEnd == 1) {
1597 VT = ConcatOps[0].getValueType();
1599 return ConcatOps[0];
1602 // while (Some element of ConcatOps is not of type MaxVT) {
1603 // From the end of ConcatOps, collect elements of the same type and put
1604 // them into an op of the next larger supported type
1606 while (ConcatOps[ConcatEnd-1].getValueType() != MaxVT) {
1607 Idx = ConcatEnd - 1;
1608 VT = ConcatOps[Idx--].getValueType();
1609 while (Idx >= 0 && ConcatOps[Idx].getValueType() == VT)
1612 int NextSize = VT.isVector() ? VT.getVectorNumElements() : 1;
1616 NextVT = EVT::getVectorVT(*DAG.getContext(), WidenEltVT, NextSize);
1617 } while (!TLI.isTypeLegal(NextVT));
1619 if (!VT.isVector()) {
1620 // Scalar type, create an INSERT_VECTOR_ELEMENT of type NextVT
1621 SDValue VecOp = DAG.getUNDEF(NextVT);
1622 unsigned NumToInsert = ConcatEnd - Idx - 1;
1623 for (unsigned i = 0, OpIdx = Idx+1; i < NumToInsert; i++, OpIdx++) {
1624 VecOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, NextVT, VecOp,
1625 ConcatOps[OpIdx], DAG.getIntPtrConstant(i));
1627 ConcatOps[Idx+1] = VecOp;
1628 ConcatEnd = Idx + 2;
1630 // Vector type, create a CONCAT_VECTORS of type NextVT
1631 SDValue undefVec = DAG.getUNDEF(VT);
1632 unsigned OpsToConcat = NextSize/VT.getVectorNumElements();
1633 SmallVector<SDValue, 16> SubConcatOps(OpsToConcat);
1634 unsigned RealVals = ConcatEnd - Idx - 1;
1635 unsigned SubConcatEnd = 0;
1636 unsigned SubConcatIdx = Idx + 1;
1637 while (SubConcatEnd < RealVals)
1638 SubConcatOps[SubConcatEnd++] = ConcatOps[++Idx];
1639 while (SubConcatEnd < OpsToConcat)
1640 SubConcatOps[SubConcatEnd++] = undefVec;
1641 ConcatOps[SubConcatIdx] = DAG.getNode(ISD::CONCAT_VECTORS, dl,
1642 NextVT, &SubConcatOps[0],
1644 ConcatEnd = SubConcatIdx + 1;
1648 // Check to see if we have a single operation with the widen type.
1649 if (ConcatEnd == 1) {
1650 VT = ConcatOps[0].getValueType();
1652 return ConcatOps[0];
1655 // add undefs of size MaxVT until ConcatOps grows to length of WidenVT
1656 unsigned NumOps = WidenVT.getVectorNumElements()/MaxVT.getVectorNumElements();
1657 if (NumOps != ConcatEnd ) {
1658 SDValue UndefVal = DAG.getUNDEF(MaxVT);
1659 for (unsigned j = ConcatEnd; j < NumOps; ++j)
1660 ConcatOps[j] = UndefVal;
1662 return DAG.getNode(ISD::CONCAT_VECTORS, dl, WidenVT, &ConcatOps[0], NumOps);
1665 SDValue DAGTypeLegalizer::WidenVecRes_Convert(SDNode *N) {
1666 SDValue InOp = N->getOperand(0);
1669 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1670 unsigned WidenNumElts = WidenVT.getVectorNumElements();
1672 EVT InVT = InOp.getValueType();
1673 EVT InEltVT = InVT.getVectorElementType();
1674 EVT InWidenVT = EVT::getVectorVT(*DAG.getContext(), InEltVT, WidenNumElts);
1676 unsigned Opcode = N->getOpcode();
1677 unsigned InVTNumElts = InVT.getVectorNumElements();
1679 if (getTypeAction(InVT) == TargetLowering::TypeWidenVector) {
1680 InOp = GetWidenedVector(N->getOperand(0));
1681 InVT = InOp.getValueType();
1682 InVTNumElts = InVT.getVectorNumElements();
1683 if (InVTNumElts == WidenNumElts) {
1684 if (N->getNumOperands() == 1)
1685 return DAG.getNode(Opcode, DL, WidenVT, InOp);
1686 return DAG.getNode(Opcode, DL, WidenVT, InOp, N->getOperand(1));
1690 if (TLI.isTypeLegal(InWidenVT)) {
1691 // Because the result and the input are different vector types, widening
1692 // the result could create a legal type but widening the input might make
1693 // it an illegal type that might lead to repeatedly splitting the input
1694 // and then widening it. To avoid this, we widen the input only if
1695 // it results in a legal type.
1696 if (WidenNumElts % InVTNumElts == 0) {
1697 // Widen the input and call convert on the widened input vector.
1698 unsigned NumConcat = WidenNumElts/InVTNumElts;
1699 SmallVector<SDValue, 16> Ops(NumConcat);
1701 SDValue UndefVal = DAG.getUNDEF(InVT);
1702 for (unsigned i = 1; i != NumConcat; ++i)
1704 SDValue InVec = DAG.getNode(ISD::CONCAT_VECTORS, DL, InWidenVT,
1705 &Ops[0], NumConcat);
1706 if (N->getNumOperands() == 1)
1707 return DAG.getNode(Opcode, DL, WidenVT, InVec);
1708 return DAG.getNode(Opcode, DL, WidenVT, InVec, N->getOperand(1));
1711 if (InVTNumElts % WidenNumElts == 0) {
1712 SDValue InVal = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InWidenVT,
1713 InOp, DAG.getIntPtrConstant(0));
1714 // Extract the input and convert the shorten input vector.
1715 if (N->getNumOperands() == 1)
1716 return DAG.getNode(Opcode, DL, WidenVT, InVal);
1717 return DAG.getNode(Opcode, DL, WidenVT, InVal, N->getOperand(1));
1721 // Otherwise unroll into some nasty scalar code and rebuild the vector.
1722 SmallVector<SDValue, 16> Ops(WidenNumElts);
1723 EVT EltVT = WidenVT.getVectorElementType();
1724 unsigned MinElts = std::min(InVTNumElts, WidenNumElts);
1726 for (i=0; i < MinElts; ++i) {
1727 SDValue Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, InEltVT, InOp,
1728 DAG.getIntPtrConstant(i));
1729 if (N->getNumOperands() == 1)
1730 Ops[i] = DAG.getNode(Opcode, DL, EltVT, Val);
1732 Ops[i] = DAG.getNode(Opcode, DL, EltVT, Val, N->getOperand(1));
1735 SDValue UndefVal = DAG.getUNDEF(EltVT);
1736 for (; i < WidenNumElts; ++i)
1739 return DAG.getNode(ISD::BUILD_VECTOR, DL, WidenVT, &Ops[0], WidenNumElts);
1742 SDValue DAGTypeLegalizer::WidenVecRes_POWI(SDNode *N) {
1743 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1744 SDValue InOp = GetWidenedVector(N->getOperand(0));
1745 SDValue ShOp = N->getOperand(1);
1746 return DAG.getNode(N->getOpcode(), SDLoc(N), WidenVT, InOp, ShOp);
1749 SDValue DAGTypeLegalizer::WidenVecRes_Shift(SDNode *N) {
1750 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1751 SDValue InOp = GetWidenedVector(N->getOperand(0));
1752 SDValue ShOp = N->getOperand(1);
1754 EVT ShVT = ShOp.getValueType();
1755 if (getTypeAction(ShVT) == TargetLowering::TypeWidenVector) {
1756 ShOp = GetWidenedVector(ShOp);
1757 ShVT = ShOp.getValueType();
1759 EVT ShWidenVT = EVT::getVectorVT(*DAG.getContext(),
1760 ShVT.getVectorElementType(),
1761 WidenVT.getVectorNumElements());
1762 if (ShVT != ShWidenVT)
1763 ShOp = ModifyToType(ShOp, ShWidenVT);
1765 return DAG.getNode(N->getOpcode(), SDLoc(N), WidenVT, InOp, ShOp);
1768 SDValue DAGTypeLegalizer::WidenVecRes_Unary(SDNode *N) {
1769 // Unary op widening.
1770 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1771 SDValue InOp = GetWidenedVector(N->getOperand(0));
1772 return DAG.getNode(N->getOpcode(), SDLoc(N), WidenVT, InOp);
1775 SDValue DAGTypeLegalizer::WidenVecRes_InregOp(SDNode *N) {
1776 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1777 EVT ExtVT = EVT::getVectorVT(*DAG.getContext(),
1778 cast<VTSDNode>(N->getOperand(1))->getVT()
1779 .getVectorElementType(),
1780 WidenVT.getVectorNumElements());
1781 SDValue WidenLHS = GetWidenedVector(N->getOperand(0));
1782 return DAG.getNode(N->getOpcode(), SDLoc(N),
1783 WidenVT, WidenLHS, DAG.getValueType(ExtVT));
1786 SDValue DAGTypeLegalizer::WidenVecRes_MERGE_VALUES(SDNode *N, unsigned ResNo) {
1787 SDValue WidenVec = DisintegrateMERGE_VALUES(N, ResNo);
1788 return GetWidenedVector(WidenVec);
1791 SDValue DAGTypeLegalizer::WidenVecRes_BITCAST(SDNode *N) {
1792 SDValue InOp = N->getOperand(0);
1793 EVT InVT = InOp.getValueType();
1794 EVT VT = N->getValueType(0);
1795 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1798 switch (getTypeAction(InVT)) {
1799 case TargetLowering::TypeLegal:
1801 case TargetLowering::TypePromoteInteger:
1802 // If the incoming type is a vector that is being promoted, then
1803 // we know that the elements are arranged differently and that we
1804 // must perform the conversion using a stack slot.
1805 if (InVT.isVector())
1808 // If the InOp is promoted to the same size, convert it. Otherwise,
1809 // fall out of the switch and widen the promoted input.
1810 InOp = GetPromotedInteger(InOp);
1811 InVT = InOp.getValueType();
1812 if (WidenVT.bitsEq(InVT))
1813 return DAG.getNode(ISD::BITCAST, dl, WidenVT, InOp);
1815 case TargetLowering::TypeSoftenFloat:
1816 case TargetLowering::TypeExpandInteger:
1817 case TargetLowering::TypeExpandFloat:
1818 case TargetLowering::TypeScalarizeVector:
1819 case TargetLowering::TypeSplitVector:
1821 case TargetLowering::TypeWidenVector:
1822 // If the InOp is widened to the same size, convert it. Otherwise, fall
1823 // out of the switch and widen the widened input.
1824 InOp = GetWidenedVector(InOp);
1825 InVT = InOp.getValueType();
1826 if (WidenVT.bitsEq(InVT))
1827 // The input widens to the same size. Convert to the widen value.
1828 return DAG.getNode(ISD::BITCAST, dl, WidenVT, InOp);
1832 unsigned WidenSize = WidenVT.getSizeInBits();
1833 unsigned InSize = InVT.getSizeInBits();
1834 // x86mmx is not an acceptable vector element type, so don't try.
1835 if (WidenSize % InSize == 0 && InVT != MVT::x86mmx) {
1836 // Determine new input vector type. The new input vector type will use
1837 // the same element type (if its a vector) or use the input type as a
1838 // vector. It is the same size as the type to widen to.
1840 unsigned NewNumElts = WidenSize / InSize;
1841 if (InVT.isVector()) {
1842 EVT InEltVT = InVT.getVectorElementType();
1843 NewInVT = EVT::getVectorVT(*DAG.getContext(), InEltVT,
1844 WidenSize / InEltVT.getSizeInBits());
1846 NewInVT = EVT::getVectorVT(*DAG.getContext(), InVT, NewNumElts);
1849 if (TLI.isTypeLegal(NewInVT)) {
1850 // Because the result and the input are different vector types, widening
1851 // the result could create a legal type but widening the input might make
1852 // it an illegal type that might lead to repeatedly splitting the input
1853 // and then widening it. To avoid this, we widen the input only if
1854 // it results in a legal type.
1855 SmallVector<SDValue, 16> Ops(NewNumElts);
1856 SDValue UndefVal = DAG.getUNDEF(InVT);
1858 for (unsigned i = 1; i < NewNumElts; ++i)
1862 if (InVT.isVector())
1863 NewVec = DAG.getNode(ISD::CONCAT_VECTORS, dl,
1864 NewInVT, &Ops[0], NewNumElts);
1866 NewVec = DAG.getNode(ISD::BUILD_VECTOR, dl,
1867 NewInVT, &Ops[0], NewNumElts);
1868 return DAG.getNode(ISD::BITCAST, dl, WidenVT, NewVec);
1872 return CreateStackStoreLoad(InOp, WidenVT);
1875 SDValue DAGTypeLegalizer::WidenVecRes_BUILD_VECTOR(SDNode *N) {
1877 // Build a vector with undefined for the new nodes.
1878 EVT VT = N->getValueType(0);
1880 // Integer BUILD_VECTOR operands may be larger than the node's vector element
1881 // type. The UNDEFs need to have the same type as the existing operands.
1882 EVT EltVT = N->getOperand(0).getValueType();
1883 unsigned NumElts = VT.getVectorNumElements();
1885 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1886 unsigned WidenNumElts = WidenVT.getVectorNumElements();
1888 SmallVector<SDValue, 16> NewOps(N->op_begin(), N->op_end());
1889 assert(WidenNumElts >= NumElts && "Shrinking vector instead of widening!");
1890 NewOps.append(WidenNumElts - NumElts, DAG.getUNDEF(EltVT));
1892 return DAG.getNode(ISD::BUILD_VECTOR, dl, WidenVT, &NewOps[0], NewOps.size());
1895 SDValue DAGTypeLegalizer::WidenVecRes_CONCAT_VECTORS(SDNode *N) {
1896 EVT InVT = N->getOperand(0).getValueType();
1897 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1899 unsigned WidenNumElts = WidenVT.getVectorNumElements();
1900 unsigned NumInElts = InVT.getVectorNumElements();
1901 unsigned NumOperands = N->getNumOperands();
1903 bool InputWidened = false; // Indicates we need to widen the input.
1904 if (getTypeAction(InVT) != TargetLowering::TypeWidenVector) {
1905 if (WidenVT.getVectorNumElements() % InVT.getVectorNumElements() == 0) {
1906 // Add undef vectors to widen to correct length.
1907 unsigned NumConcat = WidenVT.getVectorNumElements() /
1908 InVT.getVectorNumElements();
1909 SDValue UndefVal = DAG.getUNDEF(InVT);
1910 SmallVector<SDValue, 16> Ops(NumConcat);
1911 for (unsigned i=0; i < NumOperands; ++i)
1912 Ops[i] = N->getOperand(i);
1913 for (unsigned i = NumOperands; i != NumConcat; ++i)
1915 return DAG.getNode(ISD::CONCAT_VECTORS, dl, WidenVT, &Ops[0], NumConcat);
1918 InputWidened = true;
1919 if (WidenVT == TLI.getTypeToTransformTo(*DAG.getContext(), InVT)) {
1920 // The inputs and the result are widen to the same value.
1922 for (i=1; i < NumOperands; ++i)
1923 if (N->getOperand(i).getOpcode() != ISD::UNDEF)
1926 if (i == NumOperands)
1927 // Everything but the first operand is an UNDEF so just return the
1928 // widened first operand.
1929 return GetWidenedVector(N->getOperand(0));
1931 if (NumOperands == 2) {
1932 // Replace concat of two operands with a shuffle.
1933 SmallVector<int, 16> MaskOps(WidenNumElts, -1);
1934 for (unsigned i = 0; i < NumInElts; ++i) {
1936 MaskOps[i + NumInElts] = i + WidenNumElts;
1938 return DAG.getVectorShuffle(WidenVT, dl,
1939 GetWidenedVector(N->getOperand(0)),
1940 GetWidenedVector(N->getOperand(1)),
1946 // Fall back to use extracts and build vector.
1947 EVT EltVT = WidenVT.getVectorElementType();
1948 SmallVector<SDValue, 16> Ops(WidenNumElts);
1950 for (unsigned i=0; i < NumOperands; ++i) {
1951 SDValue InOp = N->getOperand(i);
1953 InOp = GetWidenedVector(InOp);
1954 for (unsigned j=0; j < NumInElts; ++j)
1955 Ops[Idx++] = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, InOp,
1956 DAG.getIntPtrConstant(j));
1958 SDValue UndefVal = DAG.getUNDEF(EltVT);
1959 for (; Idx < WidenNumElts; ++Idx)
1960 Ops[Idx] = UndefVal;
1961 return DAG.getNode(ISD::BUILD_VECTOR, dl, WidenVT, &Ops[0], WidenNumElts);
1964 SDValue DAGTypeLegalizer::WidenVecRes_CONVERT_RNDSAT(SDNode *N) {
1966 SDValue InOp = N->getOperand(0);
1967 SDValue RndOp = N->getOperand(3);
1968 SDValue SatOp = N->getOperand(4);
1970 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1971 unsigned WidenNumElts = WidenVT.getVectorNumElements();
1973 EVT InVT = InOp.getValueType();
1974 EVT InEltVT = InVT.getVectorElementType();
1975 EVT InWidenVT = EVT::getVectorVT(*DAG.getContext(), InEltVT, WidenNumElts);
1977 SDValue DTyOp = DAG.getValueType(WidenVT);
1978 SDValue STyOp = DAG.getValueType(InWidenVT);
1979 ISD::CvtCode CvtCode = cast<CvtRndSatSDNode>(N)->getCvtCode();
1981 unsigned InVTNumElts = InVT.getVectorNumElements();
1982 if (getTypeAction(InVT) == TargetLowering::TypeWidenVector) {
1983 InOp = GetWidenedVector(InOp);
1984 InVT = InOp.getValueType();
1985 InVTNumElts = InVT.getVectorNumElements();
1986 if (InVTNumElts == WidenNumElts)
1987 return DAG.getConvertRndSat(WidenVT, dl, InOp, DTyOp, STyOp, RndOp,
1991 if (TLI.isTypeLegal(InWidenVT)) {
1992 // Because the result and the input are different vector types, widening
1993 // the result could create a legal type but widening the input might make
1994 // it an illegal type that might lead to repeatedly splitting the input
1995 // and then widening it. To avoid this, we widen the input only if
1996 // it results in a legal type.
1997 if (WidenNumElts % InVTNumElts == 0) {
1998 // Widen the input and call convert on the widened input vector.
1999 unsigned NumConcat = WidenNumElts/InVTNumElts;
2000 SmallVector<SDValue, 16> Ops(NumConcat);
2002 SDValue UndefVal = DAG.getUNDEF(InVT);
2003 for (unsigned i = 1; i != NumConcat; ++i)
2006 InOp = DAG.getNode(ISD::CONCAT_VECTORS, dl, InWidenVT, &Ops[0],NumConcat);
2007 return DAG.getConvertRndSat(WidenVT, dl, InOp, DTyOp, STyOp, RndOp,
2011 if (InVTNumElts % WidenNumElts == 0) {
2012 // Extract the input and convert the shorten input vector.
2013 InOp = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, InWidenVT, InOp,
2014 DAG.getIntPtrConstant(0));
2015 return DAG.getConvertRndSat(WidenVT, dl, InOp, DTyOp, STyOp, RndOp,
2020 // Otherwise unroll into some nasty scalar code and rebuild the vector.
2021 SmallVector<SDValue, 16> Ops(WidenNumElts);
2022 EVT EltVT = WidenVT.getVectorElementType();
2023 DTyOp = DAG.getValueType(EltVT);
2024 STyOp = DAG.getValueType(InEltVT);
2026 unsigned MinElts = std::min(InVTNumElts, WidenNumElts);
2028 for (i=0; i < MinElts; ++i) {
2029 SDValue ExtVal = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, InEltVT, InOp,
2030 DAG.getIntPtrConstant(i));
2031 Ops[i] = DAG.getConvertRndSat(WidenVT, dl, ExtVal, DTyOp, STyOp, RndOp,
2035 SDValue UndefVal = DAG.getUNDEF(EltVT);
2036 for (; i < WidenNumElts; ++i)
2039 return DAG.getNode(ISD::BUILD_VECTOR, dl, WidenVT, &Ops[0], WidenNumElts);
2042 SDValue DAGTypeLegalizer::WidenVecRes_EXTRACT_SUBVECTOR(SDNode *N) {
2043 EVT VT = N->getValueType(0);
2044 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2045 unsigned WidenNumElts = WidenVT.getVectorNumElements();
2046 SDValue InOp = N->getOperand(0);
2047 SDValue Idx = N->getOperand(1);
2050 if (getTypeAction(InOp.getValueType()) == TargetLowering::TypeWidenVector)
2051 InOp = GetWidenedVector(InOp);
2053 EVT InVT = InOp.getValueType();
2055 // Check if we can just return the input vector after widening.
2056 uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
2057 if (IdxVal == 0 && InVT == WidenVT)
2060 // Check if we can extract from the vector.
2061 unsigned InNumElts = InVT.getVectorNumElements();
2062 if (IdxVal % WidenNumElts == 0 && IdxVal + WidenNumElts < InNumElts)
2063 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, WidenVT, InOp, Idx);
2065 // We could try widening the input to the right length but for now, extract
2066 // the original elements, fill the rest with undefs and build a vector.
2067 SmallVector<SDValue, 16> Ops(WidenNumElts);
2068 EVT EltVT = VT.getVectorElementType();
2069 unsigned NumElts = VT.getVectorNumElements();
2071 for (i=0; i < NumElts; ++i)
2072 Ops[i] = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, InOp,
2073 DAG.getIntPtrConstant(IdxVal+i));
2075 SDValue UndefVal = DAG.getUNDEF(EltVT);
2076 for (; i < WidenNumElts; ++i)
2078 return DAG.getNode(ISD::BUILD_VECTOR, dl, WidenVT, &Ops[0], WidenNumElts);
2081 SDValue DAGTypeLegalizer::WidenVecRes_INSERT_VECTOR_ELT(SDNode *N) {
2082 SDValue InOp = GetWidenedVector(N->getOperand(0));
2083 return DAG.getNode(ISD::INSERT_VECTOR_ELT, SDLoc(N),
2084 InOp.getValueType(), InOp,
2085 N->getOperand(1), N->getOperand(2));
2088 SDValue DAGTypeLegalizer::WidenVecRes_LOAD(SDNode *N) {
2089 LoadSDNode *LD = cast<LoadSDNode>(N);
2090 ISD::LoadExtType ExtType = LD->getExtensionType();
2093 SmallVector<SDValue, 16> LdChain; // Chain for the series of load
2094 if (ExtType != ISD::NON_EXTLOAD)
2095 Result = GenWidenVectorExtLoads(LdChain, LD, ExtType);
2097 Result = GenWidenVectorLoads(LdChain, LD);
2099 // If we generate a single load, we can use that for the chain. Otherwise,
2100 // build a factor node to remember the multiple loads are independent and
2103 if (LdChain.size() == 1)
2104 NewChain = LdChain[0];
2106 NewChain = DAG.getNode(ISD::TokenFactor, SDLoc(LD), MVT::Other,
2107 &LdChain[0], LdChain.size());
2109 // Modified the chain - switch anything that used the old chain to use
2111 ReplaceValueWith(SDValue(N, 1), NewChain);
2116 SDValue DAGTypeLegalizer::WidenVecRes_SCALAR_TO_VECTOR(SDNode *N) {
2117 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2118 return DAG.getNode(ISD::SCALAR_TO_VECTOR, SDLoc(N),
2119 WidenVT, N->getOperand(0));
2122 SDValue DAGTypeLegalizer::WidenVecRes_SELECT(SDNode *N) {
2123 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2124 unsigned WidenNumElts = WidenVT.getVectorNumElements();
2126 SDValue Cond1 = N->getOperand(0);
2127 EVT CondVT = Cond1.getValueType();
2128 if (CondVT.isVector()) {
2129 EVT CondEltVT = CondVT.getVectorElementType();
2130 EVT CondWidenVT = EVT::getVectorVT(*DAG.getContext(),
2131 CondEltVT, WidenNumElts);
2132 if (getTypeAction(CondVT) == TargetLowering::TypeWidenVector)
2133 Cond1 = GetWidenedVector(Cond1);
2135 if (Cond1.getValueType() != CondWidenVT)
2136 Cond1 = ModifyToType(Cond1, CondWidenVT);
2139 SDValue InOp1 = GetWidenedVector(N->getOperand(1));
2140 SDValue InOp2 = GetWidenedVector(N->getOperand(2));
2141 assert(InOp1.getValueType() == WidenVT && InOp2.getValueType() == WidenVT);
2142 return DAG.getNode(N->getOpcode(), SDLoc(N),
2143 WidenVT, Cond1, InOp1, InOp2);
2146 SDValue DAGTypeLegalizer::WidenVecRes_SELECT_CC(SDNode *N) {
2147 SDValue InOp1 = GetWidenedVector(N->getOperand(2));
2148 SDValue InOp2 = GetWidenedVector(N->getOperand(3));
2149 return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
2150 InOp1.getValueType(), N->getOperand(0),
2151 N->getOperand(1), InOp1, InOp2, N->getOperand(4));
2154 SDValue DAGTypeLegalizer::WidenVecRes_SETCC(SDNode *N) {
2155 assert(N->getValueType(0).isVector() ==
2156 N->getOperand(0).getValueType().isVector() &&
2157 "Scalar/Vector type mismatch");
2158 if (N->getValueType(0).isVector()) return WidenVecRes_VSETCC(N);
2160 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2161 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
2162 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
2163 return DAG.getNode(ISD::SETCC, SDLoc(N), WidenVT,
2164 InOp1, InOp2, N->getOperand(2));
2167 SDValue DAGTypeLegalizer::WidenVecRes_UNDEF(SDNode *N) {
2168 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2169 return DAG.getUNDEF(WidenVT);
2172 SDValue DAGTypeLegalizer::WidenVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N) {
2173 EVT VT = N->getValueType(0);
2176 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2177 unsigned NumElts = VT.getVectorNumElements();
2178 unsigned WidenNumElts = WidenVT.getVectorNumElements();
2180 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
2181 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
2183 // Adjust mask based on new input vector length.
2184 SmallVector<int, 16> NewMask;
2185 for (unsigned i = 0; i != NumElts; ++i) {
2186 int Idx = N->getMaskElt(i);
2187 if (Idx < (int)NumElts)
2188 NewMask.push_back(Idx);
2190 NewMask.push_back(Idx - NumElts + WidenNumElts);
2192 for (unsigned i = NumElts; i != WidenNumElts; ++i)
2193 NewMask.push_back(-1);
2194 return DAG.getVectorShuffle(WidenVT, dl, InOp1, InOp2, &NewMask[0]);
2197 SDValue DAGTypeLegalizer::WidenVecRes_VSETCC(SDNode *N) {
2198 assert(N->getValueType(0).isVector() &&
2199 N->getOperand(0).getValueType().isVector() &&
2200 "Operands must be vectors");
2201 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2202 unsigned WidenNumElts = WidenVT.getVectorNumElements();
2204 SDValue InOp1 = N->getOperand(0);
2205 EVT InVT = InOp1.getValueType();
2206 assert(InVT.isVector() && "can not widen non vector type");
2207 EVT WidenInVT = EVT::getVectorVT(*DAG.getContext(),
2208 InVT.getVectorElementType(), WidenNumElts);
2209 InOp1 = GetWidenedVector(InOp1);
2210 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
2212 // Assume that the input and output will be widen appropriately. If not,
2213 // we will have to unroll it at some point.
2214 assert(InOp1.getValueType() == WidenInVT &&
2215 InOp2.getValueType() == WidenInVT &&
2216 "Input not widened to expected type!");
2218 return DAG.getNode(ISD::SETCC, SDLoc(N),
2219 WidenVT, InOp1, InOp2, N->getOperand(2));
2223 //===----------------------------------------------------------------------===//
2224 // Widen Vector Operand
2225 //===----------------------------------------------------------------------===//
2226 bool DAGTypeLegalizer::WidenVectorOperand(SDNode *N, unsigned OpNo) {
2227 DEBUG(dbgs() << "Widen node operand " << OpNo << ": ";
2230 SDValue Res = SDValue();
2232 // See if the target wants to custom widen this node.
2233 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
2236 switch (N->getOpcode()) {
2239 dbgs() << "WidenVectorOperand op #" << OpNo << ": ";
2243 llvm_unreachable("Do not know how to widen this operator's operand!");
2245 case ISD::BITCAST: Res = WidenVecOp_BITCAST(N); break;
2246 case ISD::CONCAT_VECTORS: Res = WidenVecOp_CONCAT_VECTORS(N); break;
2247 case ISD::EXTRACT_SUBVECTOR: Res = WidenVecOp_EXTRACT_SUBVECTOR(N); break;
2248 case ISD::EXTRACT_VECTOR_ELT: Res = WidenVecOp_EXTRACT_VECTOR_ELT(N); break;
2249 case ISD::STORE: Res = WidenVecOp_STORE(N); break;
2250 case ISD::SETCC: Res = WidenVecOp_SETCC(N); break;
2252 case ISD::FP_EXTEND:
2253 case ISD::FP_TO_SINT:
2254 case ISD::FP_TO_UINT:
2255 case ISD::SINT_TO_FP:
2256 case ISD::UINT_TO_FP:
2258 case ISD::SIGN_EXTEND:
2259 case ISD::ZERO_EXTEND:
2260 case ISD::ANY_EXTEND:
2261 Res = WidenVecOp_Convert(N);
2265 // If Res is null, the sub-method took care of registering the result.
2266 if (!Res.getNode()) return false;
2268 // If the result is N, the sub-method updated N in place. Tell the legalizer
2270 if (Res.getNode() == N)
2274 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
2275 "Invalid operand expansion");
2277 ReplaceValueWith(SDValue(N, 0), Res);
2281 SDValue DAGTypeLegalizer::WidenVecOp_Convert(SDNode *N) {
2282 // Since the result is legal and the input is illegal, it is unlikely
2283 // that we can fix the input to a legal type so unroll the convert
2284 // into some scalar code and create a nasty build vector.
2285 EVT VT = N->getValueType(0);
2286 EVT EltVT = VT.getVectorElementType();
2288 unsigned NumElts = VT.getVectorNumElements();
2289 SDValue InOp = N->getOperand(0);
2290 if (getTypeAction(InOp.getValueType()) == TargetLowering::TypeWidenVector)
2291 InOp = GetWidenedVector(InOp);
2292 EVT InVT = InOp.getValueType();
2293 EVT InEltVT = InVT.getVectorElementType();
2295 unsigned Opcode = N->getOpcode();
2296 SmallVector<SDValue, 16> Ops(NumElts);
2297 for (unsigned i=0; i < NumElts; ++i)
2298 Ops[i] = DAG.getNode(Opcode, dl, EltVT,
2299 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, InEltVT, InOp,
2300 DAG.getIntPtrConstant(i)));
2302 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &Ops[0], NumElts);
2305 SDValue DAGTypeLegalizer::WidenVecOp_BITCAST(SDNode *N) {
2306 EVT VT = N->getValueType(0);
2307 SDValue InOp = GetWidenedVector(N->getOperand(0));
2308 EVT InWidenVT = InOp.getValueType();
2311 // Check if we can convert between two legal vector types and extract.
2312 unsigned InWidenSize = InWidenVT.getSizeInBits();
2313 unsigned Size = VT.getSizeInBits();
2314 // x86mmx is not an acceptable vector element type, so don't try.
2315 if (InWidenSize % Size == 0 && !VT.isVector() && VT != MVT::x86mmx) {
2316 unsigned NewNumElts = InWidenSize / Size;
2317 EVT NewVT = EVT::getVectorVT(*DAG.getContext(), VT, NewNumElts);
2318 if (TLI.isTypeLegal(NewVT)) {
2319 SDValue BitOp = DAG.getNode(ISD::BITCAST, dl, NewVT, InOp);
2320 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, BitOp,
2321 DAG.getIntPtrConstant(0));
2325 return CreateStackStoreLoad(InOp, VT);
2328 SDValue DAGTypeLegalizer::WidenVecOp_CONCAT_VECTORS(SDNode *N) {
2329 // If the input vector is not legal, it is likely that we will not find a
2330 // legal vector of the same size. Replace the concatenate vector with a
2331 // nasty build vector.
2332 EVT VT = N->getValueType(0);
2333 EVT EltVT = VT.getVectorElementType();
2335 unsigned NumElts = VT.getVectorNumElements();
2336 SmallVector<SDValue, 16> Ops(NumElts);
2338 EVT InVT = N->getOperand(0).getValueType();
2339 unsigned NumInElts = InVT.getVectorNumElements();
2342 unsigned NumOperands = N->getNumOperands();
2343 for (unsigned i=0; i < NumOperands; ++i) {
2344 SDValue InOp = N->getOperand(i);
2345 if (getTypeAction(InOp.getValueType()) == TargetLowering::TypeWidenVector)
2346 InOp = GetWidenedVector(InOp);
2347 for (unsigned j=0; j < NumInElts; ++j)
2348 Ops[Idx++] = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, InOp,
2349 DAG.getIntPtrConstant(j));
2351 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &Ops[0], NumElts);
2354 SDValue DAGTypeLegalizer::WidenVecOp_EXTRACT_SUBVECTOR(SDNode *N) {
2355 SDValue InOp = GetWidenedVector(N->getOperand(0));
2356 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, SDLoc(N),
2357 N->getValueType(0), InOp, N->getOperand(1));
2360 SDValue DAGTypeLegalizer::WidenVecOp_EXTRACT_VECTOR_ELT(SDNode *N) {
2361 SDValue InOp = GetWidenedVector(N->getOperand(0));
2362 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N),
2363 N->getValueType(0), InOp, N->getOperand(1));
2366 SDValue DAGTypeLegalizer::WidenVecOp_STORE(SDNode *N) {
2367 // We have to widen the value but we want only to store the original
2369 StoreSDNode *ST = cast<StoreSDNode>(N);
2371 SmallVector<SDValue, 16> StChain;
2372 if (ST->isTruncatingStore())
2373 GenWidenVectorTruncStores(StChain, ST);
2375 GenWidenVectorStores(StChain, ST);
2377 if (StChain.size() == 1)
2380 return DAG.getNode(ISD::TokenFactor, SDLoc(ST),
2381 MVT::Other,&StChain[0],StChain.size());
2384 SDValue DAGTypeLegalizer::WidenVecOp_SETCC(SDNode *N) {
2385 SDValue InOp0 = GetWidenedVector(N->getOperand(0));
2386 SDValue InOp1 = GetWidenedVector(N->getOperand(1));
2389 // WARNING: In this code we widen the compare instruction with garbage.
2390 // This garbage may contain denormal floats which may be slow. Is this a real
2391 // concern ? Should we zero the unused lanes if this is a float compare ?
2393 // Get a new SETCC node to compare the newly widened operands.
2394 // Only some of the compared elements are legal.
2395 EVT SVT = TLI.getSetCCResultType(*DAG.getContext(), InOp0.getValueType());
2396 SDValue WideSETCC = DAG.getNode(ISD::SETCC, SDLoc(N),
2397 SVT, InOp0, InOp1, N->getOperand(2));
2399 // Extract the needed results from the result vector.
2400 EVT ResVT = EVT::getVectorVT(*DAG.getContext(),
2401 SVT.getVectorElementType(),
2402 N->getValueType(0).getVectorNumElements());
2403 SDValue CC = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl,
2404 ResVT, WideSETCC, DAG.getIntPtrConstant(0));
2406 return PromoteTargetBoolean(CC, N->getValueType(0));
2410 //===----------------------------------------------------------------------===//
2411 // Vector Widening Utilities
2412 //===----------------------------------------------------------------------===//
2414 // Utility function to find the type to chop up a widen vector for load/store
2415 // TLI: Target lowering used to determine legal types.
2416 // Width: Width left need to load/store.
2417 // WidenVT: The widen vector type to load to/store from
2418 // Align: If 0, don't allow use of a wider type
2419 // WidenEx: If Align is not 0, the amount additional we can load/store from.
2421 static EVT FindMemType(SelectionDAG& DAG, const TargetLowering &TLI,
2422 unsigned Width, EVT WidenVT,
2423 unsigned Align = 0, unsigned WidenEx = 0) {
2424 EVT WidenEltVT = WidenVT.getVectorElementType();
2425 unsigned WidenWidth = WidenVT.getSizeInBits();
2426 unsigned WidenEltWidth = WidenEltVT.getSizeInBits();
2427 unsigned AlignInBits = Align*8;
2429 // If we have one element to load/store, return it.
2430 EVT RetVT = WidenEltVT;
2431 if (Width == WidenEltWidth)
2434 // See if there is larger legal integer than the element type to load/store
2436 for (VT = (unsigned)MVT::LAST_INTEGER_VALUETYPE;
2437 VT >= (unsigned)MVT::FIRST_INTEGER_VALUETYPE; --VT) {
2438 EVT MemVT((MVT::SimpleValueType) VT);
2439 unsigned MemVTWidth = MemVT.getSizeInBits();
2440 if (MemVT.getSizeInBits() <= WidenEltWidth)
2442 if (TLI.isTypeLegal(MemVT) && (WidenWidth % MemVTWidth) == 0 &&
2443 isPowerOf2_32(WidenWidth / MemVTWidth) &&
2444 (MemVTWidth <= Width ||
2445 (Align!=0 && MemVTWidth<=AlignInBits && MemVTWidth<=Width+WidenEx))) {
2451 // See if there is a larger vector type to load/store that has the same vector
2452 // element type and is evenly divisible with the WidenVT.
2453 for (VT = (unsigned)MVT::LAST_VECTOR_VALUETYPE;
2454 VT >= (unsigned)MVT::FIRST_VECTOR_VALUETYPE; --VT) {
2455 EVT MemVT = (MVT::SimpleValueType) VT;
2456 unsigned MemVTWidth = MemVT.getSizeInBits();
2457 if (TLI.isTypeLegal(MemVT) && WidenEltVT == MemVT.getVectorElementType() &&
2458 (WidenWidth % MemVTWidth) == 0 &&
2459 isPowerOf2_32(WidenWidth / MemVTWidth) &&
2460 (MemVTWidth <= Width ||
2461 (Align!=0 && MemVTWidth<=AlignInBits && MemVTWidth<=Width+WidenEx))) {
2462 if (RetVT.getSizeInBits() < MemVTWidth || MemVT == WidenVT)
2470 // Builds a vector type from scalar loads
2471 // VecTy: Resulting Vector type
2472 // LDOps: Load operators to build a vector type
2473 // [Start,End) the list of loads to use.
2474 static SDValue BuildVectorFromScalar(SelectionDAG& DAG, EVT VecTy,
2475 SmallVectorImpl<SDValue> &LdOps,
2476 unsigned Start, unsigned End) {
2477 SDLoc dl(LdOps[Start]);
2478 EVT LdTy = LdOps[Start].getValueType();
2479 unsigned Width = VecTy.getSizeInBits();
2480 unsigned NumElts = Width / LdTy.getSizeInBits();
2481 EVT NewVecVT = EVT::getVectorVT(*DAG.getContext(), LdTy, NumElts);
2484 SDValue VecOp = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, NewVecVT,LdOps[Start]);
2486 for (unsigned i = Start + 1; i != End; ++i) {
2487 EVT NewLdTy = LdOps[i].getValueType();
2488 if (NewLdTy != LdTy) {
2489 NumElts = Width / NewLdTy.getSizeInBits();
2490 NewVecVT = EVT::getVectorVT(*DAG.getContext(), NewLdTy, NumElts);
2491 VecOp = DAG.getNode(ISD::BITCAST, dl, NewVecVT, VecOp);
2492 // Readjust position and vector position based on new load type
2493 Idx = Idx * LdTy.getSizeInBits() / NewLdTy.getSizeInBits();
2496 VecOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, NewVecVT, VecOp, LdOps[i],
2497 DAG.getIntPtrConstant(Idx++));
2499 return DAG.getNode(ISD::BITCAST, dl, VecTy, VecOp);
2502 SDValue DAGTypeLegalizer::GenWidenVectorLoads(SmallVectorImpl<SDValue> &LdChain,
2504 // The strategy assumes that we can efficiently load powers of two widths.
2505 // The routines chops the vector into the largest vector loads with the same
2506 // element type or scalar loads and then recombines it to the widen vector
2508 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(),LD->getValueType(0));
2509 unsigned WidenWidth = WidenVT.getSizeInBits();
2510 EVT LdVT = LD->getMemoryVT();
2512 assert(LdVT.isVector() && WidenVT.isVector());
2513 assert(LdVT.getVectorElementType() == WidenVT.getVectorElementType());
2516 SDValue Chain = LD->getChain();
2517 SDValue BasePtr = LD->getBasePtr();
2518 unsigned Align = LD->getAlignment();
2519 bool isVolatile = LD->isVolatile();
2520 bool isNonTemporal = LD->isNonTemporal();
2521 bool isInvariant = LD->isInvariant();
2523 int LdWidth = LdVT.getSizeInBits();
2524 int WidthDiff = WidenWidth - LdWidth; // Difference
2525 unsigned LdAlign = (isVolatile) ? 0 : Align; // Allow wider loads
2527 // Find the vector type that can load from.
2528 EVT NewVT = FindMemType(DAG, TLI, LdWidth, WidenVT, LdAlign, WidthDiff);
2529 int NewVTWidth = NewVT.getSizeInBits();
2530 SDValue LdOp = DAG.getLoad(NewVT, dl, Chain, BasePtr, LD->getPointerInfo(),
2531 isVolatile, isNonTemporal, isInvariant, Align);
2532 LdChain.push_back(LdOp.getValue(1));
2534 // Check if we can load the element with one instruction
2535 if (LdWidth <= NewVTWidth) {
2536 if (!NewVT.isVector()) {
2537 unsigned NumElts = WidenWidth / NewVTWidth;
2538 EVT NewVecVT = EVT::getVectorVT(*DAG.getContext(), NewVT, NumElts);
2539 SDValue VecOp = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, NewVecVT, LdOp);
2540 return DAG.getNode(ISD::BITCAST, dl, WidenVT, VecOp);
2542 if (NewVT == WidenVT)
2545 assert(WidenWidth % NewVTWidth == 0);
2546 unsigned NumConcat = WidenWidth / NewVTWidth;
2547 SmallVector<SDValue, 16> ConcatOps(NumConcat);
2548 SDValue UndefVal = DAG.getUNDEF(NewVT);
2549 ConcatOps[0] = LdOp;
2550 for (unsigned i = 1; i != NumConcat; ++i)
2551 ConcatOps[i] = UndefVal;
2552 return DAG.getNode(ISD::CONCAT_VECTORS, dl, WidenVT, &ConcatOps[0],
2556 // Load vector by using multiple loads from largest vector to scalar
2557 SmallVector<SDValue, 16> LdOps;
2558 LdOps.push_back(LdOp);
2560 LdWidth -= NewVTWidth;
2561 unsigned Offset = 0;
2563 while (LdWidth > 0) {
2564 unsigned Increment = NewVTWidth / 8;
2565 Offset += Increment;
2566 BasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(), BasePtr,
2567 DAG.getIntPtrConstant(Increment));
2570 if (LdWidth < NewVTWidth) {
2571 // Our current type we are using is too large, find a better size
2572 NewVT = FindMemType(DAG, TLI, LdWidth, WidenVT, LdAlign, WidthDiff);
2573 NewVTWidth = NewVT.getSizeInBits();
2574 L = DAG.getLoad(NewVT, dl, Chain, BasePtr,
2575 LD->getPointerInfo().getWithOffset(Offset), isVolatile,
2576 isNonTemporal, isInvariant, MinAlign(Align, Increment));
2577 LdChain.push_back(L.getValue(1));
2578 if (L->getValueType(0).isVector()) {
2579 SmallVector<SDValue, 16> Loads;
2581 unsigned size = L->getValueSizeInBits(0);
2582 while (size < LdOp->getValueSizeInBits(0)) {
2583 Loads.push_back(DAG.getUNDEF(L->getValueType(0)));
2584 size += L->getValueSizeInBits(0);
2586 L = DAG.getNode(ISD::CONCAT_VECTORS, dl, LdOp->getValueType(0),
2587 &Loads[0], Loads.size());
2590 L = DAG.getLoad(NewVT, dl, Chain, BasePtr,
2591 LD->getPointerInfo().getWithOffset(Offset), isVolatile,
2592 isNonTemporal, isInvariant, MinAlign(Align, Increment));
2593 LdChain.push_back(L.getValue(1));
2599 LdWidth -= NewVTWidth;
2602 // Build the vector from the loads operations
2603 unsigned End = LdOps.size();
2604 if (!LdOps[0].getValueType().isVector())
2605 // All the loads are scalar loads.
2606 return BuildVectorFromScalar(DAG, WidenVT, LdOps, 0, End);
2608 // If the load contains vectors, build the vector using concat vector.
2609 // All of the vectors used to loads are power of 2 and the scalars load
2610 // can be combined to make a power of 2 vector.
2611 SmallVector<SDValue, 16> ConcatOps(End);
2614 EVT LdTy = LdOps[i].getValueType();
2615 // First combine the scalar loads to a vector
2616 if (!LdTy.isVector()) {
2617 for (--i; i >= 0; --i) {
2618 LdTy = LdOps[i].getValueType();
2619 if (LdTy.isVector())
2622 ConcatOps[--Idx] = BuildVectorFromScalar(DAG, LdTy, LdOps, i+1, End);
2624 ConcatOps[--Idx] = LdOps[i];
2625 for (--i; i >= 0; --i) {
2626 EVT NewLdTy = LdOps[i].getValueType();
2627 if (NewLdTy != LdTy) {
2628 // Create a larger vector
2629 ConcatOps[End-1] = DAG.getNode(ISD::CONCAT_VECTORS, dl, NewLdTy,
2630 &ConcatOps[Idx], End - Idx);
2634 ConcatOps[--Idx] = LdOps[i];
2637 if (WidenWidth == LdTy.getSizeInBits()*(End - Idx))
2638 return DAG.getNode(ISD::CONCAT_VECTORS, dl, WidenVT,
2639 &ConcatOps[Idx], End - Idx);
2641 // We need to fill the rest with undefs to build the vector
2642 unsigned NumOps = WidenWidth / LdTy.getSizeInBits();
2643 SmallVector<SDValue, 16> WidenOps(NumOps);
2644 SDValue UndefVal = DAG.getUNDEF(LdTy);
2647 for (; i != End-Idx; ++i)
2648 WidenOps[i] = ConcatOps[Idx+i];
2649 for (; i != NumOps; ++i)
2650 WidenOps[i] = UndefVal;
2652 return DAG.getNode(ISD::CONCAT_VECTORS, dl, WidenVT, &WidenOps[0],NumOps);
2656 DAGTypeLegalizer::GenWidenVectorExtLoads(SmallVectorImpl<SDValue> &LdChain,
2658 ISD::LoadExtType ExtType) {
2659 // For extension loads, it may not be more efficient to chop up the vector
2660 // and then extended it. Instead, we unroll the load and build a new vector.
2661 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(),LD->getValueType(0));
2662 EVT LdVT = LD->getMemoryVT();
2664 assert(LdVT.isVector() && WidenVT.isVector());
2667 SDValue Chain = LD->getChain();
2668 SDValue BasePtr = LD->getBasePtr();
2669 unsigned Align = LD->getAlignment();
2670 bool isVolatile = LD->isVolatile();
2671 bool isNonTemporal = LD->isNonTemporal();
2673 EVT EltVT = WidenVT.getVectorElementType();
2674 EVT LdEltVT = LdVT.getVectorElementType();
2675 unsigned NumElts = LdVT.getVectorNumElements();
2677 // Load each element and widen
2678 unsigned WidenNumElts = WidenVT.getVectorNumElements();
2679 SmallVector<SDValue, 16> Ops(WidenNumElts);
2680 unsigned Increment = LdEltVT.getSizeInBits() / 8;
2681 Ops[0] = DAG.getExtLoad(ExtType, dl, EltVT, Chain, BasePtr,
2682 LD->getPointerInfo(),
2683 LdEltVT, isVolatile, isNonTemporal, Align);
2684 LdChain.push_back(Ops[0].getValue(1));
2685 unsigned i = 0, Offset = Increment;
2686 for (i=1; i < NumElts; ++i, Offset += Increment) {
2687 SDValue NewBasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(),
2688 BasePtr, DAG.getIntPtrConstant(Offset));
2689 Ops[i] = DAG.getExtLoad(ExtType, dl, EltVT, Chain, NewBasePtr,
2690 LD->getPointerInfo().getWithOffset(Offset), LdEltVT,
2691 isVolatile, isNonTemporal, Align);
2692 LdChain.push_back(Ops[i].getValue(1));
2695 // Fill the rest with undefs
2696 SDValue UndefVal = DAG.getUNDEF(EltVT);
2697 for (; i != WidenNumElts; ++i)
2700 return DAG.getNode(ISD::BUILD_VECTOR, dl, WidenVT, &Ops[0], Ops.size());
2704 void DAGTypeLegalizer::GenWidenVectorStores(SmallVectorImpl<SDValue> &StChain,
2706 // The strategy assumes that we can efficiently store powers of two widths.
2707 // The routines chops the vector into the largest vector stores with the same
2708 // element type or scalar stores.
2709 SDValue Chain = ST->getChain();
2710 SDValue BasePtr = ST->getBasePtr();
2711 unsigned Align = ST->getAlignment();
2712 bool isVolatile = ST->isVolatile();
2713 bool isNonTemporal = ST->isNonTemporal();
2714 SDValue ValOp = GetWidenedVector(ST->getValue());
2717 EVT StVT = ST->getMemoryVT();
2718 unsigned StWidth = StVT.getSizeInBits();
2719 EVT ValVT = ValOp.getValueType();
2720 unsigned ValWidth = ValVT.getSizeInBits();
2721 EVT ValEltVT = ValVT.getVectorElementType();
2722 unsigned ValEltWidth = ValEltVT.getSizeInBits();
2723 assert(StVT.getVectorElementType() == ValEltVT);
2725 int Idx = 0; // current index to store
2726 unsigned Offset = 0; // offset from base to store
2727 while (StWidth != 0) {
2728 // Find the largest vector type we can store with
2729 EVT NewVT = FindMemType(DAG, TLI, StWidth, ValVT);
2730 unsigned NewVTWidth = NewVT.getSizeInBits();
2731 unsigned Increment = NewVTWidth / 8;
2732 if (NewVT.isVector()) {
2733 unsigned NumVTElts = NewVT.getVectorNumElements();
2735 SDValue EOp = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, NewVT, ValOp,
2736 DAG.getIntPtrConstant(Idx));
2737 StChain.push_back(DAG.getStore(Chain, dl, EOp, BasePtr,
2738 ST->getPointerInfo().getWithOffset(Offset),
2739 isVolatile, isNonTemporal,
2740 MinAlign(Align, Offset)));
2741 StWidth -= NewVTWidth;
2742 Offset += Increment;
2744 BasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(), BasePtr,
2745 DAG.getIntPtrConstant(Increment));
2746 } while (StWidth != 0 && StWidth >= NewVTWidth);
2748 // Cast the vector to the scalar type we can store
2749 unsigned NumElts = ValWidth / NewVTWidth;
2750 EVT NewVecVT = EVT::getVectorVT(*DAG.getContext(), NewVT, NumElts);
2751 SDValue VecOp = DAG.getNode(ISD::BITCAST, dl, NewVecVT, ValOp);
2752 // Readjust index position based on new vector type
2753 Idx = Idx * ValEltWidth / NewVTWidth;
2755 SDValue EOp = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NewVT, VecOp,
2756 DAG.getIntPtrConstant(Idx++));
2757 StChain.push_back(DAG.getStore(Chain, dl, EOp, BasePtr,
2758 ST->getPointerInfo().getWithOffset(Offset),
2759 isVolatile, isNonTemporal,
2760 MinAlign(Align, Offset)));
2761 StWidth -= NewVTWidth;
2762 Offset += Increment;
2763 BasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(), BasePtr,
2764 DAG.getIntPtrConstant(Increment));
2765 } while (StWidth != 0 && StWidth >= NewVTWidth);
2766 // Restore index back to be relative to the original widen element type
2767 Idx = Idx * NewVTWidth / ValEltWidth;
2773 DAGTypeLegalizer::GenWidenVectorTruncStores(SmallVectorImpl<SDValue> &StChain,
2775 // For extension loads, it may not be more efficient to truncate the vector
2776 // and then store it. Instead, we extract each element and then store it.
2777 SDValue Chain = ST->getChain();
2778 SDValue BasePtr = ST->getBasePtr();
2779 unsigned Align = ST->getAlignment();
2780 bool isVolatile = ST->isVolatile();
2781 bool isNonTemporal = ST->isNonTemporal();
2782 SDValue ValOp = GetWidenedVector(ST->getValue());
2785 EVT StVT = ST->getMemoryVT();
2786 EVT ValVT = ValOp.getValueType();
2788 // It must be true that we the widen vector type is bigger than where
2789 // we need to store.
2790 assert(StVT.isVector() && ValOp.getValueType().isVector());
2791 assert(StVT.bitsLT(ValOp.getValueType()));
2793 // For truncating stores, we can not play the tricks of chopping legal
2794 // vector types and bit cast it to the right type. Instead, we unroll
2796 EVT StEltVT = StVT.getVectorElementType();
2797 EVT ValEltVT = ValVT.getVectorElementType();
2798 unsigned Increment = ValEltVT.getSizeInBits() / 8;
2799 unsigned NumElts = StVT.getVectorNumElements();
2800 SDValue EOp = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, ValEltVT, ValOp,
2801 DAG.getIntPtrConstant(0));
2802 StChain.push_back(DAG.getTruncStore(Chain, dl, EOp, BasePtr,
2803 ST->getPointerInfo(), StEltVT,
2804 isVolatile, isNonTemporal, Align));
2805 unsigned Offset = Increment;
2806 for (unsigned i=1; i < NumElts; ++i, Offset += Increment) {
2807 SDValue NewBasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(),
2808 BasePtr, DAG.getIntPtrConstant(Offset));
2809 SDValue EOp = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, ValEltVT, ValOp,
2810 DAG.getIntPtrConstant(0));
2811 StChain.push_back(DAG.getTruncStore(Chain, dl, EOp, NewBasePtr,
2812 ST->getPointerInfo().getWithOffset(Offset),
2813 StEltVT, isVolatile, isNonTemporal,
2814 MinAlign(Align, Offset)));
2818 /// Modifies a vector input (widen or narrows) to a vector of NVT. The
2819 /// input vector must have the same element type as NVT.
2820 SDValue DAGTypeLegalizer::ModifyToType(SDValue InOp, EVT NVT) {
2821 // Note that InOp might have been widened so it might already have
2822 // the right width or it might need be narrowed.
2823 EVT InVT = InOp.getValueType();
2824 assert(InVT.getVectorElementType() == NVT.getVectorElementType() &&
2825 "input and widen element type must match");
2828 // Check if InOp already has the right width.
2832 unsigned InNumElts = InVT.getVectorNumElements();
2833 unsigned WidenNumElts = NVT.getVectorNumElements();
2834 if (WidenNumElts > InNumElts && WidenNumElts % InNumElts == 0) {
2835 unsigned NumConcat = WidenNumElts / InNumElts;
2836 SmallVector<SDValue, 16> Ops(NumConcat);
2837 SDValue UndefVal = DAG.getUNDEF(InVT);
2839 for (unsigned i = 1; i != NumConcat; ++i)
2842 return DAG.getNode(ISD::CONCAT_VECTORS, dl, NVT, &Ops[0], NumConcat);
2845 if (WidenNumElts < InNumElts && InNumElts % WidenNumElts)
2846 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, NVT, InOp,
2847 DAG.getIntPtrConstant(0));
2849 // Fall back to extract and build.
2850 SmallVector<SDValue, 16> Ops(WidenNumElts);
2851 EVT EltVT = NVT.getVectorElementType();
2852 unsigned MinNumElts = std::min(WidenNumElts, InNumElts);
2854 for (Idx = 0; Idx < MinNumElts; ++Idx)
2855 Ops[Idx] = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, InOp,
2856 DAG.getIntPtrConstant(Idx));
2858 SDValue UndefVal = DAG.getUNDEF(EltVT);
2859 for ( ; Idx < WidenNumElts; ++Idx)
2860 Ops[Idx] = UndefVal;
2861 return DAG.getNode(ISD::BUILD_VECTOR, dl, NVT, &Ops[0], WidenNumElts);