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 #define DEBUG_TYPE "legalize-types"
31 //===----------------------------------------------------------------------===//
32 // Result Vector Scalarization: <1 x ty> -> ty.
33 //===----------------------------------------------------------------------===//
35 void DAGTypeLegalizer::ScalarizeVectorResult(SDNode *N, unsigned ResNo) {
36 DEBUG(dbgs() << "Scalarize node result " << ResNo << ": ";
39 SDValue R = SDValue();
41 switch (N->getOpcode()) {
44 dbgs() << "ScalarizeVectorResult #" << ResNo << ": ";
48 report_fatal_error("Do not know how to scalarize the result of this "
51 case ISD::MERGE_VALUES: R = ScalarizeVecRes_MERGE_VALUES(N, ResNo);break;
52 case ISD::BITCAST: R = ScalarizeVecRes_BITCAST(N); break;
53 case ISD::BUILD_VECTOR: R = ScalarizeVecRes_BUILD_VECTOR(N); break;
54 case ISD::EXTRACT_SUBVECTOR: R = ScalarizeVecRes_EXTRACT_SUBVECTOR(N); break;
55 case ISD::FP_ROUND: R = ScalarizeVecRes_FP_ROUND(N); break;
56 case ISD::FP_ROUND_INREG: R = ScalarizeVecRes_InregOp(N); break;
57 case ISD::FPOWI: R = ScalarizeVecRes_FPOWI(N); break;
58 case ISD::INSERT_VECTOR_ELT: R = ScalarizeVecRes_INSERT_VECTOR_ELT(N); break;
59 case ISD::LOAD: R = ScalarizeVecRes_LOAD(cast<LoadSDNode>(N));break;
60 case ISD::SCALAR_TO_VECTOR: R = ScalarizeVecRes_SCALAR_TO_VECTOR(N); break;
61 case ISD::SIGN_EXTEND_INREG: R = ScalarizeVecRes_InregOp(N); break;
62 case ISD::VSELECT: R = ScalarizeVecRes_VSELECT(N); break;
63 case ISD::SELECT: R = ScalarizeVecRes_SELECT(N); break;
64 case ISD::SELECT_CC: R = ScalarizeVecRes_SELECT_CC(N); break;
65 case ISD::SETCC: R = ScalarizeVecRes_SETCC(N); break;
66 case ISD::UNDEF: R = ScalarizeVecRes_UNDEF(N); break;
67 case ISD::VECTOR_SHUFFLE: R = ScalarizeVecRes_VECTOR_SHUFFLE(N); break;
68 case ISD::ANY_EXTEND_VECTOR_INREG:
69 case ISD::SIGN_EXTEND_VECTOR_INREG:
70 case ISD::ZERO_EXTEND_VECTOR_INREG:
71 R = ScalarizeVecRes_VecInregOp(N);
77 case ISD::CTLZ_ZERO_UNDEF:
80 case ISD::CTTZ_ZERO_UNDEF:
100 case ISD::SIGN_EXTEND:
101 case ISD::SINT_TO_FP:
103 case ISD::UINT_TO_FP:
104 case ISD::ZERO_EXTEND:
105 case ISD::FCANONICALIZE:
106 R = ScalarizeVecRes_UnaryOp(N);
138 R = ScalarizeVecRes_BinOp(N);
141 R = ScalarizeVecRes_TernaryOp(N);
145 // If R is null, the sub-method took care of registering the result.
147 SetScalarizedVector(SDValue(N, ResNo), R);
150 SDValue DAGTypeLegalizer::ScalarizeVecRes_BinOp(SDNode *N) {
151 SDValue LHS = GetScalarizedVector(N->getOperand(0));
152 SDValue RHS = GetScalarizedVector(N->getOperand(1));
153 return DAG.getNode(N->getOpcode(), SDLoc(N),
154 LHS.getValueType(), LHS, RHS, N->getFlags());
157 SDValue DAGTypeLegalizer::ScalarizeVecRes_TernaryOp(SDNode *N) {
158 SDValue Op0 = GetScalarizedVector(N->getOperand(0));
159 SDValue Op1 = GetScalarizedVector(N->getOperand(1));
160 SDValue Op2 = GetScalarizedVector(N->getOperand(2));
161 return DAG.getNode(N->getOpcode(), SDLoc(N),
162 Op0.getValueType(), Op0, Op1, Op2);
165 SDValue DAGTypeLegalizer::ScalarizeVecRes_MERGE_VALUES(SDNode *N,
167 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
168 return GetScalarizedVector(Op);
171 SDValue DAGTypeLegalizer::ScalarizeVecRes_BITCAST(SDNode *N) {
172 EVT NewVT = N->getValueType(0).getVectorElementType();
173 return DAG.getNode(ISD::BITCAST, SDLoc(N),
174 NewVT, N->getOperand(0));
177 SDValue DAGTypeLegalizer::ScalarizeVecRes_BUILD_VECTOR(SDNode *N) {
178 EVT EltVT = N->getValueType(0).getVectorElementType();
179 SDValue InOp = N->getOperand(0);
180 // The BUILD_VECTOR operands may be of wider element types and
181 // we may need to truncate them back to the requested return type.
182 if (EltVT.isInteger())
183 return DAG.getNode(ISD::TRUNCATE, SDLoc(N), EltVT, InOp);
187 SDValue DAGTypeLegalizer::ScalarizeVecRes_EXTRACT_SUBVECTOR(SDNode *N) {
188 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N),
189 N->getValueType(0).getVectorElementType(),
190 N->getOperand(0), N->getOperand(1));
193 SDValue DAGTypeLegalizer::ScalarizeVecRes_FP_ROUND(SDNode *N) {
194 EVT NewVT = N->getValueType(0).getVectorElementType();
195 SDValue Op = GetScalarizedVector(N->getOperand(0));
196 return DAG.getNode(ISD::FP_ROUND, SDLoc(N),
197 NewVT, Op, N->getOperand(1));
200 SDValue DAGTypeLegalizer::ScalarizeVecRes_FPOWI(SDNode *N) {
201 SDValue Op = GetScalarizedVector(N->getOperand(0));
202 return DAG.getNode(ISD::FPOWI, SDLoc(N),
203 Op.getValueType(), Op, N->getOperand(1));
206 SDValue DAGTypeLegalizer::ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N) {
207 // The value to insert may have a wider type than the vector element type,
208 // so be sure to truncate it to the element type if necessary.
209 SDValue Op = N->getOperand(1);
210 EVT EltVT = N->getValueType(0).getVectorElementType();
211 if (Op.getValueType() != EltVT)
212 // FIXME: Can this happen for floating point types?
213 Op = DAG.getNode(ISD::TRUNCATE, SDLoc(N), EltVT, Op);
217 SDValue DAGTypeLegalizer::ScalarizeVecRes_LOAD(LoadSDNode *N) {
218 assert(N->isUnindexed() && "Indexed vector load?");
220 SDValue Result = DAG.getLoad(
221 ISD::UNINDEXED, N->getExtensionType(),
222 N->getValueType(0).getVectorElementType(), SDLoc(N), N->getChain(),
223 N->getBasePtr(), DAG.getUNDEF(N->getBasePtr().getValueType()),
224 N->getPointerInfo(), N->getMemoryVT().getVectorElementType(),
225 N->getOriginalAlignment(), N->getMemOperand()->getFlags(),
228 // Legalize the chain result - switch anything that used the old chain to
230 ReplaceValueWith(SDValue(N, 1), Result.getValue(1));
234 SDValue DAGTypeLegalizer::ScalarizeVecRes_UnaryOp(SDNode *N) {
235 // Get the dest type - it doesn't always match the input type, e.g. int_to_fp.
236 EVT DestVT = N->getValueType(0).getVectorElementType();
237 SDValue Op = N->getOperand(0);
238 EVT OpVT = Op.getValueType();
240 // The result needs scalarizing, but it's not a given that the source does.
241 // This is a workaround for targets where it's impossible to scalarize the
242 // result of a conversion, because the source type is legal.
243 // For instance, this happens on AArch64: v1i1 is illegal but v1i{8,16,32}
244 // are widened to v8i8, v4i16, and v2i32, which is legal, because v1i64 is
245 // legal and was not scalarized.
246 // See the similar logic in ScalarizeVecRes_VSETCC
247 if (getTypeAction(OpVT) == TargetLowering::TypeScalarizeVector) {
248 Op = GetScalarizedVector(Op);
250 EVT VT = OpVT.getVectorElementType();
252 ISD::EXTRACT_VECTOR_ELT, DL, VT, Op,
253 DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout())));
255 return DAG.getNode(N->getOpcode(), SDLoc(N), DestVT, Op);
258 SDValue DAGTypeLegalizer::ScalarizeVecRes_InregOp(SDNode *N) {
259 EVT EltVT = N->getValueType(0).getVectorElementType();
260 EVT ExtVT = cast<VTSDNode>(N->getOperand(1))->getVT().getVectorElementType();
261 SDValue LHS = GetScalarizedVector(N->getOperand(0));
262 return DAG.getNode(N->getOpcode(), SDLoc(N), EltVT,
263 LHS, DAG.getValueType(ExtVT));
266 SDValue DAGTypeLegalizer::ScalarizeVecRes_VecInregOp(SDNode *N) {
268 SDValue Op = N->getOperand(0);
270 EVT OpVT = Op.getValueType();
271 EVT OpEltVT = OpVT.getVectorElementType();
272 EVT EltVT = N->getValueType(0).getVectorElementType();
274 if (getTypeAction(OpVT) == TargetLowering::TypeScalarizeVector) {
275 Op = GetScalarizedVector(Op);
278 ISD::EXTRACT_VECTOR_ELT, DL, OpEltVT, Op,
279 DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout())));
282 switch (N->getOpcode()) {
283 case ISD::ANY_EXTEND_VECTOR_INREG:
284 return DAG.getNode(ISD::ANY_EXTEND, DL, EltVT, Op);
285 case ISD::SIGN_EXTEND_VECTOR_INREG:
286 return DAG.getNode(ISD::SIGN_EXTEND, DL, EltVT, Op);
287 case ISD::ZERO_EXTEND_VECTOR_INREG:
288 return DAG.getNode(ISD::ZERO_EXTEND, DL, EltVT, Op);
291 llvm_unreachable("Illegal extend_vector_inreg opcode");
294 SDValue DAGTypeLegalizer::ScalarizeVecRes_SCALAR_TO_VECTOR(SDNode *N) {
295 // If the operand is wider than the vector element type then it is implicitly
296 // truncated. Make that explicit here.
297 EVT EltVT = N->getValueType(0).getVectorElementType();
298 SDValue InOp = N->getOperand(0);
299 if (InOp.getValueType() != EltVT)
300 return DAG.getNode(ISD::TRUNCATE, SDLoc(N), EltVT, InOp);
304 SDValue DAGTypeLegalizer::ScalarizeVecRes_VSELECT(SDNode *N) {
305 SDValue Cond = N->getOperand(0);
306 EVT OpVT = Cond.getValueType();
308 // The vselect result and true/value operands needs scalarizing, but it's
309 // not a given that the Cond does. For instance, in AVX512 v1i1 is legal.
310 // See the similar logic in ScalarizeVecRes_VSETCC
311 if (getTypeAction(OpVT) == TargetLowering::TypeScalarizeVector) {
312 Cond = GetScalarizedVector(Cond);
314 EVT VT = OpVT.getVectorElementType();
316 ISD::EXTRACT_VECTOR_ELT, DL, VT, Cond,
317 DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout())));
320 SDValue LHS = GetScalarizedVector(N->getOperand(1));
321 TargetLowering::BooleanContent ScalarBool =
322 TLI.getBooleanContents(false, false);
323 TargetLowering::BooleanContent VecBool = TLI.getBooleanContents(true, false);
325 // If integer and float booleans have different contents then we can't
326 // reliably optimize in all cases. There is a full explanation for this in
327 // DAGCombiner::visitSELECT() where the same issue affects folding
328 // (select C, 0, 1) to (xor C, 1).
329 if (TLI.getBooleanContents(false, false) !=
330 TLI.getBooleanContents(false, true)) {
331 // At least try the common case where the boolean is generated by a
333 if (Cond->getOpcode() == ISD::SETCC) {
334 EVT OpVT = Cond->getOperand(0)->getValueType(0);
335 ScalarBool = TLI.getBooleanContents(OpVT.getScalarType());
336 VecBool = TLI.getBooleanContents(OpVT);
338 ScalarBool = TargetLowering::UndefinedBooleanContent;
341 if (ScalarBool != VecBool) {
342 EVT CondVT = Cond.getValueType();
343 switch (ScalarBool) {
344 case TargetLowering::UndefinedBooleanContent:
346 case TargetLowering::ZeroOrOneBooleanContent:
347 assert(VecBool == TargetLowering::UndefinedBooleanContent ||
348 VecBool == TargetLowering::ZeroOrNegativeOneBooleanContent);
349 // Vector read from all ones, scalar expects a single 1 so mask.
350 Cond = DAG.getNode(ISD::AND, SDLoc(N), CondVT,
351 Cond, DAG.getConstant(1, SDLoc(N), CondVT));
353 case TargetLowering::ZeroOrNegativeOneBooleanContent:
354 assert(VecBool == TargetLowering::UndefinedBooleanContent ||
355 VecBool == TargetLowering::ZeroOrOneBooleanContent);
356 // Vector reads from a one, scalar from all ones so sign extend.
357 Cond = DAG.getNode(ISD::SIGN_EXTEND_INREG, SDLoc(N), CondVT,
358 Cond, DAG.getValueType(MVT::i1));
363 return DAG.getSelect(SDLoc(N),
364 LHS.getValueType(), Cond, LHS,
365 GetScalarizedVector(N->getOperand(2)));
368 SDValue DAGTypeLegalizer::ScalarizeVecRes_SELECT(SDNode *N) {
369 SDValue LHS = GetScalarizedVector(N->getOperand(1));
370 return DAG.getSelect(SDLoc(N),
371 LHS.getValueType(), N->getOperand(0), LHS,
372 GetScalarizedVector(N->getOperand(2)));
375 SDValue DAGTypeLegalizer::ScalarizeVecRes_SELECT_CC(SDNode *N) {
376 SDValue LHS = GetScalarizedVector(N->getOperand(2));
377 return DAG.getNode(ISD::SELECT_CC, SDLoc(N), LHS.getValueType(),
378 N->getOperand(0), N->getOperand(1),
379 LHS, GetScalarizedVector(N->getOperand(3)),
383 SDValue DAGTypeLegalizer::ScalarizeVecRes_SETCC(SDNode *N) {
384 assert(N->getValueType(0).isVector() ==
385 N->getOperand(0).getValueType().isVector() &&
386 "Scalar/Vector type mismatch");
388 if (N->getValueType(0).isVector()) return ScalarizeVecRes_VSETCC(N);
390 SDValue LHS = GetScalarizedVector(N->getOperand(0));
391 SDValue RHS = GetScalarizedVector(N->getOperand(1));
394 // Turn it into a scalar SETCC.
395 return DAG.getNode(ISD::SETCC, DL, MVT::i1, LHS, RHS, N->getOperand(2));
398 SDValue DAGTypeLegalizer::ScalarizeVecRes_UNDEF(SDNode *N) {
399 return DAG.getUNDEF(N->getValueType(0).getVectorElementType());
402 SDValue DAGTypeLegalizer::ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N) {
403 // Figure out if the scalar is the LHS or RHS and return it.
404 SDValue Arg = N->getOperand(2).getOperand(0);
406 return DAG.getUNDEF(N->getValueType(0).getVectorElementType());
407 unsigned Op = !cast<ConstantSDNode>(Arg)->isNullValue();
408 return GetScalarizedVector(N->getOperand(Op));
411 SDValue DAGTypeLegalizer::ScalarizeVecRes_VSETCC(SDNode *N) {
412 assert(N->getValueType(0).isVector() &&
413 N->getOperand(0).getValueType().isVector() &&
414 "Operand types must be vectors");
415 SDValue LHS = N->getOperand(0);
416 SDValue RHS = N->getOperand(1);
417 EVT OpVT = LHS.getValueType();
418 EVT NVT = N->getValueType(0).getVectorElementType();
421 // The result needs scalarizing, but it's not a given that the source does.
422 if (getTypeAction(OpVT) == TargetLowering::TypeScalarizeVector) {
423 LHS = GetScalarizedVector(LHS);
424 RHS = GetScalarizedVector(RHS);
426 EVT VT = OpVT.getVectorElementType();
428 ISD::EXTRACT_VECTOR_ELT, DL, VT, LHS,
429 DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout())));
431 ISD::EXTRACT_VECTOR_ELT, DL, VT, RHS,
432 DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout())));
435 // Turn it into a scalar SETCC.
436 SDValue Res = DAG.getNode(ISD::SETCC, DL, MVT::i1, LHS, RHS,
438 // Vectors may have a different boolean contents to scalars. Promote the
439 // value appropriately.
440 ISD::NodeType ExtendCode =
441 TargetLowering::getExtendForContent(TLI.getBooleanContents(OpVT));
442 return DAG.getNode(ExtendCode, DL, NVT, Res);
446 //===----------------------------------------------------------------------===//
447 // Operand Vector Scalarization <1 x ty> -> ty.
448 //===----------------------------------------------------------------------===//
450 bool DAGTypeLegalizer::ScalarizeVectorOperand(SDNode *N, unsigned OpNo) {
451 DEBUG(dbgs() << "Scalarize node operand " << OpNo << ": ";
454 SDValue Res = SDValue();
456 if (!Res.getNode()) {
457 switch (N->getOpcode()) {
460 dbgs() << "ScalarizeVectorOperand Op #" << OpNo << ": ";
464 llvm_unreachable("Do not know how to scalarize this operator's operand!");
466 Res = ScalarizeVecOp_BITCAST(N);
468 case ISD::ANY_EXTEND:
469 case ISD::ZERO_EXTEND:
470 case ISD::SIGN_EXTEND:
472 case ISD::FP_TO_SINT:
473 case ISD::FP_TO_UINT:
474 case ISD::SINT_TO_FP:
475 case ISD::UINT_TO_FP:
476 Res = ScalarizeVecOp_UnaryOp(N);
478 case ISD::CONCAT_VECTORS:
479 Res = ScalarizeVecOp_CONCAT_VECTORS(N);
481 case ISD::EXTRACT_VECTOR_ELT:
482 Res = ScalarizeVecOp_EXTRACT_VECTOR_ELT(N);
485 Res = ScalarizeVecOp_VSELECT(N);
488 Res = ScalarizeVecOp_VSETCC(N);
491 Res = ScalarizeVecOp_STORE(cast<StoreSDNode>(N), OpNo);
494 Res = ScalarizeVecOp_FP_ROUND(N, OpNo);
499 // If the result is null, the sub-method took care of registering results etc.
500 if (!Res.getNode()) return false;
502 // If the result is N, the sub-method updated N in place. Tell the legalizer
504 if (Res.getNode() == N)
507 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
508 "Invalid operand expansion");
510 ReplaceValueWith(SDValue(N, 0), Res);
514 /// If the value to convert is a vector that needs to be scalarized, it must be
515 /// <1 x ty>. Convert the element instead.
516 SDValue DAGTypeLegalizer::ScalarizeVecOp_BITCAST(SDNode *N) {
517 SDValue Elt = GetScalarizedVector(N->getOperand(0));
518 return DAG.getNode(ISD::BITCAST, SDLoc(N),
519 N->getValueType(0), Elt);
522 /// If the input is a vector that needs to be scalarized, it must be <1 x ty>.
523 /// Do the operation on the element instead.
524 SDValue DAGTypeLegalizer::ScalarizeVecOp_UnaryOp(SDNode *N) {
525 assert(N->getValueType(0).getVectorNumElements() == 1 &&
526 "Unexpected vector type!");
527 SDValue Elt = GetScalarizedVector(N->getOperand(0));
528 SDValue Op = DAG.getNode(N->getOpcode(), SDLoc(N),
529 N->getValueType(0).getScalarType(), Elt);
530 // Revectorize the result so the types line up with what the uses of this
531 // expression expect.
532 return DAG.getBuildVector(N->getValueType(0), SDLoc(N), Op);
535 /// The vectors to concatenate have length one - use a BUILD_VECTOR instead.
536 SDValue DAGTypeLegalizer::ScalarizeVecOp_CONCAT_VECTORS(SDNode *N) {
537 SmallVector<SDValue, 8> Ops(N->getNumOperands());
538 for (unsigned i = 0, e = N->getNumOperands(); i < e; ++i)
539 Ops[i] = GetScalarizedVector(N->getOperand(i));
540 return DAG.getBuildVector(N->getValueType(0), SDLoc(N), Ops);
543 /// If the input is a vector that needs to be scalarized, it must be <1 x ty>,
544 /// so just return the element, ignoring the index.
545 SDValue DAGTypeLegalizer::ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N) {
546 EVT VT = N->getValueType(0);
547 SDValue Res = GetScalarizedVector(N->getOperand(0));
548 if (Res.getValueType() != VT)
549 Res = VT.isFloatingPoint()
550 ? DAG.getNode(ISD::FP_EXTEND, SDLoc(N), VT, Res)
551 : DAG.getNode(ISD::ANY_EXTEND, SDLoc(N), VT, Res);
555 /// If the input condition is a vector that needs to be scalarized, it must be
556 /// <1 x i1>, so just convert to a normal ISD::SELECT
557 /// (still with vector output type since that was acceptable if we got here).
558 SDValue DAGTypeLegalizer::ScalarizeVecOp_VSELECT(SDNode *N) {
559 SDValue ScalarCond = GetScalarizedVector(N->getOperand(0));
560 EVT VT = N->getValueType(0);
562 return DAG.getNode(ISD::SELECT, SDLoc(N), VT, ScalarCond, N->getOperand(1),
566 /// If the operand is a vector that needs to be scalarized then the
567 /// result must be v1i1, so just convert to a scalar SETCC and wrap
568 /// with a scalar_to_vector since the res type is legal if we got here
569 SDValue DAGTypeLegalizer::ScalarizeVecOp_VSETCC(SDNode *N) {
570 assert(N->getValueType(0).isVector() &&
571 N->getOperand(0).getValueType().isVector() &&
572 "Operand types must be vectors");
573 assert(N->getValueType(0) == MVT::v1i1 && "Expected v1i1 type");
575 EVT VT = N->getValueType(0);
576 SDValue LHS = GetScalarizedVector(N->getOperand(0));
577 SDValue RHS = GetScalarizedVector(N->getOperand(1));
579 EVT OpVT = N->getOperand(0).getValueType();
580 EVT NVT = VT.getVectorElementType();
582 // Turn it into a scalar SETCC.
583 SDValue Res = DAG.getNode(ISD::SETCC, DL, MVT::i1, LHS, RHS,
586 // Vectors may have a different boolean contents to scalars. Promote the
587 // value appropriately.
588 ISD::NodeType ExtendCode =
589 TargetLowering::getExtendForContent(TLI.getBooleanContents(OpVT));
591 Res = DAG.getNode(ExtendCode, DL, NVT, Res);
593 return DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, VT, Res);
596 /// If the value to store is a vector that needs to be scalarized, it must be
597 /// <1 x ty>. Just store the element.
598 SDValue DAGTypeLegalizer::ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo){
599 assert(N->isUnindexed() && "Indexed store of one-element vector?");
600 assert(OpNo == 1 && "Do not know how to scalarize this operand!");
603 if (N->isTruncatingStore())
604 return DAG.getTruncStore(
605 N->getChain(), dl, GetScalarizedVector(N->getOperand(1)),
606 N->getBasePtr(), N->getPointerInfo(),
607 N->getMemoryVT().getVectorElementType(), N->getAlignment(),
608 N->getMemOperand()->getFlags(), N->getAAInfo());
610 return DAG.getStore(N->getChain(), dl, GetScalarizedVector(N->getOperand(1)),
611 N->getBasePtr(), N->getPointerInfo(),
612 N->getOriginalAlignment(), N->getMemOperand()->getFlags(),
616 /// If the value to round is a vector that needs to be scalarized, it must be
617 /// <1 x ty>. Convert the element instead.
618 SDValue DAGTypeLegalizer::ScalarizeVecOp_FP_ROUND(SDNode *N, unsigned OpNo) {
619 SDValue Elt = GetScalarizedVector(N->getOperand(0));
620 SDValue Res = DAG.getNode(ISD::FP_ROUND, SDLoc(N),
621 N->getValueType(0).getVectorElementType(), Elt,
623 return DAG.getNode(ISD::SCALAR_TO_VECTOR, SDLoc(N), N->getValueType(0), Res);
626 //===----------------------------------------------------------------------===//
627 // Result Vector Splitting
628 //===----------------------------------------------------------------------===//
630 /// This method is called when the specified result of the specified node is
631 /// found to need vector splitting. At this point, the node may also have
632 /// invalid operands or may have other results that need legalization, we just
633 /// know that (at least) one result needs vector splitting.
634 void DAGTypeLegalizer::SplitVectorResult(SDNode *N, unsigned ResNo) {
635 DEBUG(dbgs() << "Split node result: ";
640 // See if the target wants to custom expand this node.
641 if (CustomLowerNode(N, N->getValueType(ResNo), true))
644 switch (N->getOpcode()) {
647 dbgs() << "SplitVectorResult #" << ResNo << ": ";
651 report_fatal_error("Do not know how to split the result of this "
654 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
656 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
657 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
658 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
659 case ISD::BITCAST: SplitVecRes_BITCAST(N, Lo, Hi); break;
660 case ISD::BUILD_VECTOR: SplitVecRes_BUILD_VECTOR(N, Lo, Hi); break;
661 case ISD::CONCAT_VECTORS: SplitVecRes_CONCAT_VECTORS(N, Lo, Hi); break;
662 case ISD::EXTRACT_SUBVECTOR: SplitVecRes_EXTRACT_SUBVECTOR(N, Lo, Hi); break;
663 case ISD::INSERT_SUBVECTOR: SplitVecRes_INSERT_SUBVECTOR(N, Lo, Hi); break;
664 case ISD::FP_ROUND_INREG: SplitVecRes_InregOp(N, Lo, Hi); break;
665 case ISD::FPOWI: SplitVecRes_FPOWI(N, Lo, Hi); break;
666 case ISD::FCOPYSIGN: SplitVecRes_FCOPYSIGN(N, Lo, Hi); break;
667 case ISD::INSERT_VECTOR_ELT: SplitVecRes_INSERT_VECTOR_ELT(N, Lo, Hi); break;
668 case ISD::SCALAR_TO_VECTOR: SplitVecRes_SCALAR_TO_VECTOR(N, Lo, Hi); break;
669 case ISD::SIGN_EXTEND_INREG: SplitVecRes_InregOp(N, Lo, Hi); break;
671 SplitVecRes_LOAD(cast<LoadSDNode>(N), Lo, Hi);
674 SplitVecRes_MLOAD(cast<MaskedLoadSDNode>(N), Lo, Hi);
677 SplitVecRes_MGATHER(cast<MaskedGatherSDNode>(N), Lo, Hi);
680 SplitVecRes_SETCC(N, Lo, Hi);
682 case ISD::VECTOR_SHUFFLE:
683 SplitVecRes_VECTOR_SHUFFLE(cast<ShuffleVectorSDNode>(N), Lo, Hi);
686 case ISD::ANY_EXTEND_VECTOR_INREG:
687 case ISD::SIGN_EXTEND_VECTOR_INREG:
688 case ISD::ZERO_EXTEND_VECTOR_INREG:
689 SplitVecRes_ExtVecInRegOp(N, Lo, Hi);
692 case ISD::BITREVERSE:
696 case ISD::CTLZ_ZERO_UNDEF:
697 case ISD::CTTZ_ZERO_UNDEF:
708 case ISD::FNEARBYINT:
712 case ISD::FP_TO_SINT:
713 case ISD::FP_TO_UINT:
719 case ISD::SINT_TO_FP:
721 case ISD::UINT_TO_FP:
722 case ISD::FCANONICALIZE:
723 SplitVecRes_UnaryOp(N, Lo, Hi);
726 case ISD::ANY_EXTEND:
727 case ISD::SIGN_EXTEND:
728 case ISD::ZERO_EXTEND:
729 SplitVecRes_ExtendOp(N, Lo, Hi);
761 SplitVecRes_BinOp(N, Lo, Hi);
764 SplitVecRes_TernaryOp(N, Lo, Hi);
768 // If Lo/Hi is null, the sub-method took care of registering results etc.
770 SetSplitVector(SDValue(N, ResNo), Lo, Hi);
773 void DAGTypeLegalizer::SplitVecRes_BinOp(SDNode *N, SDValue &Lo,
775 SDValue LHSLo, LHSHi;
776 GetSplitVector(N->getOperand(0), LHSLo, LHSHi);
777 SDValue RHSLo, RHSHi;
778 GetSplitVector(N->getOperand(1), RHSLo, RHSHi);
781 const SDNodeFlags Flags = N->getFlags();
782 unsigned Opcode = N->getOpcode();
783 Lo = DAG.getNode(Opcode, dl, LHSLo.getValueType(), LHSLo, RHSLo, Flags);
784 Hi = DAG.getNode(Opcode, dl, LHSHi.getValueType(), LHSHi, RHSHi, Flags);
787 void DAGTypeLegalizer::SplitVecRes_TernaryOp(SDNode *N, SDValue &Lo,
789 SDValue Op0Lo, Op0Hi;
790 GetSplitVector(N->getOperand(0), Op0Lo, Op0Hi);
791 SDValue Op1Lo, Op1Hi;
792 GetSplitVector(N->getOperand(1), Op1Lo, Op1Hi);
793 SDValue Op2Lo, Op2Hi;
794 GetSplitVector(N->getOperand(2), Op2Lo, Op2Hi);
797 Lo = DAG.getNode(N->getOpcode(), dl, Op0Lo.getValueType(),
798 Op0Lo, Op1Lo, Op2Lo);
799 Hi = DAG.getNode(N->getOpcode(), dl, Op0Hi.getValueType(),
800 Op0Hi, Op1Hi, Op2Hi);
803 void DAGTypeLegalizer::SplitVecRes_BITCAST(SDNode *N, SDValue &Lo,
805 // We know the result is a vector. The input may be either a vector or a
808 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(N->getValueType(0));
811 SDValue InOp = N->getOperand(0);
812 EVT InVT = InOp.getValueType();
814 // Handle some special cases efficiently.
815 switch (getTypeAction(InVT)) {
816 case TargetLowering::TypeLegal:
817 case TargetLowering::TypePromoteInteger:
818 case TargetLowering::TypePromoteFloat:
819 case TargetLowering::TypeSoftenFloat:
820 case TargetLowering::TypeScalarizeVector:
821 case TargetLowering::TypeWidenVector:
823 case TargetLowering::TypeExpandInteger:
824 case TargetLowering::TypeExpandFloat:
825 // A scalar to vector conversion, where the scalar needs expansion.
826 // If the vector is being split in two then we can just convert the
829 GetExpandedOp(InOp, Lo, Hi);
830 if (DAG.getDataLayout().isBigEndian())
832 Lo = DAG.getNode(ISD::BITCAST, dl, LoVT, Lo);
833 Hi = DAG.getNode(ISD::BITCAST, dl, HiVT, Hi);
837 case TargetLowering::TypeSplitVector:
838 // If the input is a vector that needs to be split, convert each split
839 // piece of the input now.
840 GetSplitVector(InOp, Lo, Hi);
841 Lo = DAG.getNode(ISD::BITCAST, dl, LoVT, Lo);
842 Hi = DAG.getNode(ISD::BITCAST, dl, HiVT, Hi);
846 // In the general case, convert the input to an integer and split it by hand.
847 EVT LoIntVT = EVT::getIntegerVT(*DAG.getContext(), LoVT.getSizeInBits());
848 EVT HiIntVT = EVT::getIntegerVT(*DAG.getContext(), HiVT.getSizeInBits());
849 if (DAG.getDataLayout().isBigEndian())
850 std::swap(LoIntVT, HiIntVT);
852 SplitInteger(BitConvertToInteger(InOp), LoIntVT, HiIntVT, Lo, Hi);
854 if (DAG.getDataLayout().isBigEndian())
856 Lo = DAG.getNode(ISD::BITCAST, dl, LoVT, Lo);
857 Hi = DAG.getNode(ISD::BITCAST, dl, HiVT, Hi);
860 void DAGTypeLegalizer::SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo,
864 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(N->getValueType(0));
865 unsigned LoNumElts = LoVT.getVectorNumElements();
866 SmallVector<SDValue, 8> LoOps(N->op_begin(), N->op_begin()+LoNumElts);
867 Lo = DAG.getBuildVector(LoVT, dl, LoOps);
869 SmallVector<SDValue, 8> HiOps(N->op_begin()+LoNumElts, N->op_end());
870 Hi = DAG.getBuildVector(HiVT, dl, HiOps);
873 void DAGTypeLegalizer::SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo,
875 assert(!(N->getNumOperands() & 1) && "Unsupported CONCAT_VECTORS");
877 unsigned NumSubvectors = N->getNumOperands() / 2;
878 if (NumSubvectors == 1) {
879 Lo = N->getOperand(0);
880 Hi = N->getOperand(1);
885 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(N->getValueType(0));
887 SmallVector<SDValue, 8> LoOps(N->op_begin(), N->op_begin()+NumSubvectors);
888 Lo = DAG.getNode(ISD::CONCAT_VECTORS, dl, LoVT, LoOps);
890 SmallVector<SDValue, 8> HiOps(N->op_begin()+NumSubvectors, N->op_end());
891 Hi = DAG.getNode(ISD::CONCAT_VECTORS, dl, HiVT, HiOps);
894 void DAGTypeLegalizer::SplitVecRes_EXTRACT_SUBVECTOR(SDNode *N, SDValue &Lo,
896 SDValue Vec = N->getOperand(0);
897 SDValue Idx = N->getOperand(1);
901 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(N->getValueType(0));
903 Lo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, LoVT, Vec, Idx);
904 uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
905 Hi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, HiVT, Vec,
906 DAG.getConstant(IdxVal + LoVT.getVectorNumElements(), dl,
907 TLI.getVectorIdxTy(DAG.getDataLayout())));
910 void DAGTypeLegalizer::SplitVecRes_INSERT_SUBVECTOR(SDNode *N, SDValue &Lo,
912 SDValue Vec = N->getOperand(0);
913 SDValue SubVec = N->getOperand(1);
914 SDValue Idx = N->getOperand(2);
916 GetSplitVector(Vec, Lo, Hi);
918 EVT VecVT = Vec.getValueType();
919 unsigned VecElems = VecVT.getVectorNumElements();
920 unsigned SubElems = SubVec.getValueType().getVectorNumElements();
922 // If we know the index is 0, and we know the subvector doesn't cross the
923 // boundary between the halves, we can avoid spilling the vector, and insert
924 // into the lower half of the split vector directly.
925 // TODO: The IdxVal == 0 constraint is artificial, we could do this whenever
926 // the index is constant and there is no boundary crossing. But those cases
927 // don't seem to get hit in practice.
928 if (ConstantSDNode *ConstIdx = dyn_cast<ConstantSDNode>(Idx)) {
929 unsigned IdxVal = ConstIdx->getZExtValue();
930 if ((IdxVal == 0) && (IdxVal + SubElems <= VecElems / 2)) {
932 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(N->getValueType(0));
933 Lo = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, LoVT, Lo, SubVec, Idx);
938 // Spill the vector to the stack.
939 SDValue StackPtr = DAG.CreateStackTemporary(VecVT);
941 DAG.getStore(DAG.getEntryNode(), dl, Vec, StackPtr, MachinePointerInfo());
943 // Store the new subvector into the specified index.
944 SDValue SubVecPtr = TLI.getVectorElementPointer(DAG, StackPtr, VecVT, Idx);
945 Type *VecType = VecVT.getTypeForEVT(*DAG.getContext());
946 unsigned Alignment = DAG.getDataLayout().getPrefTypeAlignment(VecType);
947 Store = DAG.getStore(Store, dl, SubVec, SubVecPtr, MachinePointerInfo());
949 // Load the Lo part from the stack slot.
951 DAG.getLoad(Lo.getValueType(), dl, Store, StackPtr, MachinePointerInfo());
953 // Increment the pointer to the other part.
954 unsigned IncrementSize = Lo.getValueSizeInBits() / 8;
956 DAG.getNode(ISD::ADD, dl, StackPtr.getValueType(), StackPtr,
957 DAG.getConstant(IncrementSize, dl, StackPtr.getValueType()));
959 // Load the Hi part from the stack slot.
960 Hi = DAG.getLoad(Hi.getValueType(), dl, Store, StackPtr, MachinePointerInfo(),
961 MinAlign(Alignment, IncrementSize));
964 void DAGTypeLegalizer::SplitVecRes_FPOWI(SDNode *N, SDValue &Lo,
967 GetSplitVector(N->getOperand(0), Lo, Hi);
968 Lo = DAG.getNode(ISD::FPOWI, dl, Lo.getValueType(), Lo, N->getOperand(1));
969 Hi = DAG.getNode(ISD::FPOWI, dl, Hi.getValueType(), Hi, N->getOperand(1));
972 void DAGTypeLegalizer::SplitVecRes_FCOPYSIGN(SDNode *N, SDValue &Lo,
974 SDValue LHSLo, LHSHi;
975 GetSplitVector(N->getOperand(0), LHSLo, LHSHi);
978 SDValue RHSLo, RHSHi;
979 SDValue RHS = N->getOperand(1);
980 EVT RHSVT = RHS.getValueType();
981 if (getTypeAction(RHSVT) == TargetLowering::TypeSplitVector)
982 GetSplitVector(RHS, RHSLo, RHSHi);
984 std::tie(RHSLo, RHSHi) = DAG.SplitVector(RHS, SDLoc(RHS));
987 Lo = DAG.getNode(ISD::FCOPYSIGN, DL, LHSLo.getValueType(), LHSLo, RHSLo);
988 Hi = DAG.getNode(ISD::FCOPYSIGN, DL, LHSHi.getValueType(), LHSHi, RHSHi);
991 void DAGTypeLegalizer::SplitVecRes_InregOp(SDNode *N, SDValue &Lo,
993 SDValue LHSLo, LHSHi;
994 GetSplitVector(N->getOperand(0), LHSLo, LHSHi);
998 std::tie(LoVT, HiVT) =
999 DAG.GetSplitDestVTs(cast<VTSDNode>(N->getOperand(1))->getVT());
1001 Lo = DAG.getNode(N->getOpcode(), dl, LHSLo.getValueType(), LHSLo,
1002 DAG.getValueType(LoVT));
1003 Hi = DAG.getNode(N->getOpcode(), dl, LHSHi.getValueType(), LHSHi,
1004 DAG.getValueType(HiVT));
1007 void DAGTypeLegalizer::SplitVecRes_ExtVecInRegOp(SDNode *N, SDValue &Lo,
1009 unsigned Opcode = N->getOpcode();
1010 SDValue N0 = N->getOperand(0);
1015 if (getTypeAction(N0.getValueType()) == TargetLowering::TypeSplitVector)
1016 GetSplitVector(N0, InLo, InHi);
1018 std::tie(InLo, InHi) = DAG.SplitVectorOperand(N, 0);
1020 EVT InLoVT = InLo.getValueType();
1021 unsigned InNumElements = InLoVT.getVectorNumElements();
1023 EVT OutLoVT, OutHiVT;
1024 std::tie(OutLoVT, OutHiVT) = DAG.GetSplitDestVTs(N->getValueType(0));
1025 unsigned OutNumElements = OutLoVT.getVectorNumElements();
1026 assert((2 * OutNumElements) <= InNumElements &&
1027 "Illegal extend vector in reg split");
1029 // *_EXTEND_VECTOR_INREG instructions extend the lowest elements of the
1030 // input vector (i.e. we only use InLo):
1031 // OutLo will extend the first OutNumElements from InLo.
1032 // OutHi will extend the next OutNumElements from InLo.
1034 // Shuffle the elements from InLo for OutHi into the bottom elements to
1035 // create a 'fake' InHi.
1036 SmallVector<int, 8> SplitHi(InNumElements, -1);
1037 for (unsigned i = 0; i != OutNumElements; ++i)
1038 SplitHi[i] = i + OutNumElements;
1039 InHi = DAG.getVectorShuffle(InLoVT, dl, InLo, DAG.getUNDEF(InLoVT), SplitHi);
1041 Lo = DAG.getNode(Opcode, dl, OutLoVT, InLo);
1042 Hi = DAG.getNode(Opcode, dl, OutHiVT, InHi);
1045 void DAGTypeLegalizer::SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo,
1047 SDValue Vec = N->getOperand(0);
1048 SDValue Elt = N->getOperand(1);
1049 SDValue Idx = N->getOperand(2);
1051 GetSplitVector(Vec, Lo, Hi);
1053 if (ConstantSDNode *CIdx = dyn_cast<ConstantSDNode>(Idx)) {
1054 unsigned IdxVal = CIdx->getZExtValue();
1055 unsigned LoNumElts = Lo.getValueType().getVectorNumElements();
1056 if (IdxVal < LoNumElts)
1057 Lo = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
1058 Lo.getValueType(), Lo, Elt, Idx);
1061 DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, Hi.getValueType(), Hi, Elt,
1062 DAG.getConstant(IdxVal - LoNumElts, dl,
1063 TLI.getVectorIdxTy(DAG.getDataLayout())));
1067 // See if the target wants to custom expand this node.
1068 if (CustomLowerNode(N, N->getValueType(0), true))
1071 // Spill the vector to the stack.
1072 EVT VecVT = Vec.getValueType();
1073 EVT EltVT = VecVT.getVectorElementType();
1074 SDValue StackPtr = DAG.CreateStackTemporary(VecVT);
1076 DAG.getStore(DAG.getEntryNode(), dl, Vec, StackPtr, MachinePointerInfo());
1078 // Store the new element. This may be larger than the vector element type,
1079 // so use a truncating store.
1080 SDValue EltPtr = TLI.getVectorElementPointer(DAG, StackPtr, VecVT, Idx);
1081 Type *VecType = VecVT.getTypeForEVT(*DAG.getContext());
1082 unsigned Alignment = DAG.getDataLayout().getPrefTypeAlignment(VecType);
1084 DAG.getTruncStore(Store, dl, Elt, EltPtr, MachinePointerInfo(), EltVT);
1086 // Load the Lo part from the stack slot.
1088 DAG.getLoad(Lo.getValueType(), dl, Store, StackPtr, MachinePointerInfo());
1090 // Increment the pointer to the other part.
1091 unsigned IncrementSize = Lo.getValueSizeInBits() / 8;
1092 StackPtr = DAG.getNode(ISD::ADD, dl, StackPtr.getValueType(), StackPtr,
1093 DAG.getConstant(IncrementSize, dl,
1094 StackPtr.getValueType()));
1096 // Load the Hi part from the stack slot.
1097 Hi = DAG.getLoad(Hi.getValueType(), dl, Store, StackPtr, MachinePointerInfo(),
1098 MinAlign(Alignment, IncrementSize));
1101 void DAGTypeLegalizer::SplitVecRes_SCALAR_TO_VECTOR(SDNode *N, SDValue &Lo,
1105 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(N->getValueType(0));
1106 Lo = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, LoVT, N->getOperand(0));
1107 Hi = DAG.getUNDEF(HiVT);
1110 void DAGTypeLegalizer::SplitVecRes_LOAD(LoadSDNode *LD, SDValue &Lo,
1112 assert(ISD::isUNINDEXEDLoad(LD) && "Indexed load during type legalization!");
1115 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(LD->getValueType(0));
1117 ISD::LoadExtType ExtType = LD->getExtensionType();
1118 SDValue Ch = LD->getChain();
1119 SDValue Ptr = LD->getBasePtr();
1120 SDValue Offset = DAG.getUNDEF(Ptr.getValueType());
1121 EVT MemoryVT = LD->getMemoryVT();
1122 unsigned Alignment = LD->getOriginalAlignment();
1123 MachineMemOperand::Flags MMOFlags = LD->getMemOperand()->getFlags();
1124 AAMDNodes AAInfo = LD->getAAInfo();
1126 EVT LoMemVT, HiMemVT;
1127 std::tie(LoMemVT, HiMemVT) = DAG.GetSplitDestVTs(MemoryVT);
1129 Lo = DAG.getLoad(ISD::UNINDEXED, ExtType, LoVT, dl, Ch, Ptr, Offset,
1130 LD->getPointerInfo(), LoMemVT, Alignment, MMOFlags, AAInfo);
1132 unsigned IncrementSize = LoMemVT.getSizeInBits()/8;
1133 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr,
1134 DAG.getConstant(IncrementSize, dl, Ptr.getValueType()));
1135 Hi = DAG.getLoad(ISD::UNINDEXED, ExtType, HiVT, dl, Ch, Ptr, Offset,
1136 LD->getPointerInfo().getWithOffset(IncrementSize), HiMemVT,
1137 Alignment, MMOFlags, AAInfo);
1139 // Build a factor node to remember that this load is independent of the
1141 Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
1144 // Legalize the chain result - switch anything that used the old chain to
1146 ReplaceValueWith(SDValue(LD, 1), Ch);
1149 void DAGTypeLegalizer::SplitVecRes_MLOAD(MaskedLoadSDNode *MLD,
1150 SDValue &Lo, SDValue &Hi) {
1153 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(MLD->getValueType(0));
1155 SDValue Ch = MLD->getChain();
1156 SDValue Ptr = MLD->getBasePtr();
1157 SDValue Mask = MLD->getMask();
1158 SDValue Src0 = MLD->getSrc0();
1159 unsigned Alignment = MLD->getOriginalAlignment();
1160 ISD::LoadExtType ExtType = MLD->getExtensionType();
1162 // if Alignment is equal to the vector size,
1163 // take the half of it for the second part
1164 unsigned SecondHalfAlignment =
1165 (Alignment == MLD->getValueType(0).getSizeInBits()/8) ?
1166 Alignment/2 : Alignment;
1168 // Split Mask operand
1169 SDValue MaskLo, MaskHi;
1170 if (getTypeAction(Mask.getValueType()) == TargetLowering::TypeSplitVector)
1171 GetSplitVector(Mask, MaskLo, MaskHi);
1173 std::tie(MaskLo, MaskHi) = DAG.SplitVector(Mask, dl);
1175 EVT MemoryVT = MLD->getMemoryVT();
1176 EVT LoMemVT, HiMemVT;
1177 std::tie(LoMemVT, HiMemVT) = DAG.GetSplitDestVTs(MemoryVT);
1179 SDValue Src0Lo, Src0Hi;
1180 if (getTypeAction(Src0.getValueType()) == TargetLowering::TypeSplitVector)
1181 GetSplitVector(Src0, Src0Lo, Src0Hi);
1183 std::tie(Src0Lo, Src0Hi) = DAG.SplitVector(Src0, dl);
1185 MachineMemOperand *MMO = DAG.getMachineFunction().
1186 getMachineMemOperand(MLD->getPointerInfo(),
1187 MachineMemOperand::MOLoad, LoMemVT.getStoreSize(),
1188 Alignment, MLD->getAAInfo(), MLD->getRanges());
1190 Lo = DAG.getMaskedLoad(LoVT, dl, Ch, Ptr, MaskLo, Src0Lo, LoMemVT, MMO,
1191 ExtType, MLD->isExpandingLoad());
1193 Ptr = TLI.IncrementMemoryAddress(Ptr, MaskLo, dl, LoMemVT, DAG,
1194 MLD->isExpandingLoad());
1196 MMO = DAG.getMachineFunction().
1197 getMachineMemOperand(MLD->getPointerInfo(),
1198 MachineMemOperand::MOLoad, HiMemVT.getStoreSize(),
1199 SecondHalfAlignment, MLD->getAAInfo(), MLD->getRanges());
1201 Hi = DAG.getMaskedLoad(HiVT, dl, Ch, Ptr, MaskHi, Src0Hi, HiMemVT, MMO,
1202 ExtType, MLD->isExpandingLoad());
1205 // Build a factor node to remember that this load is independent of the
1207 Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
1210 // Legalize the chain result - switch anything that used the old chain to
1212 ReplaceValueWith(SDValue(MLD, 1), Ch);
1216 void DAGTypeLegalizer::SplitVecRes_MGATHER(MaskedGatherSDNode *MGT,
1217 SDValue &Lo, SDValue &Hi) {
1220 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(MGT->getValueType(0));
1222 SDValue Ch = MGT->getChain();
1223 SDValue Ptr = MGT->getBasePtr();
1224 SDValue Mask = MGT->getMask();
1225 SDValue Src0 = MGT->getValue();
1226 SDValue Index = MGT->getIndex();
1227 unsigned Alignment = MGT->getOriginalAlignment();
1229 // Split Mask operand
1230 SDValue MaskLo, MaskHi;
1231 if (getTypeAction(Mask.getValueType()) == TargetLowering::TypeSplitVector)
1232 GetSplitVector(Mask, MaskLo, MaskHi);
1234 std::tie(MaskLo, MaskHi) = DAG.SplitVector(Mask, dl);
1236 EVT MemoryVT = MGT->getMemoryVT();
1237 EVT LoMemVT, HiMemVT;
1239 std::tie(LoMemVT, HiMemVT) = DAG.GetSplitDestVTs(MemoryVT);
1241 SDValue Src0Lo, Src0Hi;
1242 if (getTypeAction(Src0.getValueType()) == TargetLowering::TypeSplitVector)
1243 GetSplitVector(Src0, Src0Lo, Src0Hi);
1245 std::tie(Src0Lo, Src0Hi) = DAG.SplitVector(Src0, dl);
1247 SDValue IndexHi, IndexLo;
1248 if (getTypeAction(Index.getValueType()) == TargetLowering::TypeSplitVector)
1249 GetSplitVector(Index, IndexLo, IndexHi);
1251 std::tie(IndexLo, IndexHi) = DAG.SplitVector(Index, dl);
1253 MachineMemOperand *MMO = DAG.getMachineFunction().
1254 getMachineMemOperand(MGT->getPointerInfo(),
1255 MachineMemOperand::MOLoad, LoMemVT.getStoreSize(),
1256 Alignment, MGT->getAAInfo(), MGT->getRanges());
1258 SDValue OpsLo[] = {Ch, Src0Lo, MaskLo, Ptr, IndexLo};
1259 Lo = DAG.getMaskedGather(DAG.getVTList(LoVT, MVT::Other), LoVT, dl, OpsLo,
1262 SDValue OpsHi[] = {Ch, Src0Hi, MaskHi, Ptr, IndexHi};
1263 Hi = DAG.getMaskedGather(DAG.getVTList(HiVT, MVT::Other), HiVT, dl, OpsHi,
1266 // Build a factor node to remember that this load is independent of the
1268 Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
1271 // Legalize the chain result - switch anything that used the old chain to
1273 ReplaceValueWith(SDValue(MGT, 1), Ch);
1277 void DAGTypeLegalizer::SplitVecRes_SETCC(SDNode *N, SDValue &Lo, SDValue &Hi) {
1278 assert(N->getValueType(0).isVector() &&
1279 N->getOperand(0).getValueType().isVector() &&
1280 "Operand types must be vectors");
1284 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(N->getValueType(0));
1287 SDValue LL, LH, RL, RH;
1288 std::tie(LL, LH) = DAG.SplitVectorOperand(N, 0);
1289 std::tie(RL, RH) = DAG.SplitVectorOperand(N, 1);
1291 Lo = DAG.getNode(N->getOpcode(), DL, LoVT, LL, RL, N->getOperand(2));
1292 Hi = DAG.getNode(N->getOpcode(), DL, HiVT, LH, RH, N->getOperand(2));
1295 void DAGTypeLegalizer::SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo,
1297 // Get the dest types - they may not match the input types, e.g. int_to_fp.
1300 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(N->getValueType(0));
1302 // If the input also splits, handle it directly for a compile time speedup.
1303 // Otherwise split it by hand.
1304 EVT InVT = N->getOperand(0).getValueType();
1305 if (getTypeAction(InVT) == TargetLowering::TypeSplitVector)
1306 GetSplitVector(N->getOperand(0), Lo, Hi);
1308 std::tie(Lo, Hi) = DAG.SplitVectorOperand(N, 0);
1310 if (N->getOpcode() == ISD::FP_ROUND) {
1311 Lo = DAG.getNode(N->getOpcode(), dl, LoVT, Lo, N->getOperand(1));
1312 Hi = DAG.getNode(N->getOpcode(), dl, HiVT, Hi, N->getOperand(1));
1314 Lo = DAG.getNode(N->getOpcode(), dl, LoVT, Lo);
1315 Hi = DAG.getNode(N->getOpcode(), dl, HiVT, Hi);
1319 void DAGTypeLegalizer::SplitVecRes_ExtendOp(SDNode *N, SDValue &Lo,
1322 EVT SrcVT = N->getOperand(0).getValueType();
1323 EVT DestVT = N->getValueType(0);
1325 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(DestVT);
1327 // We can do better than a generic split operation if the extend is doing
1328 // more than just doubling the width of the elements and the following are
1330 // - The number of vector elements is even,
1331 // - the source type is legal,
1332 // - the type of a split source is illegal,
1333 // - the type of an extended (by doubling element size) source is legal, and
1334 // - the type of that extended source when split is legal.
1336 // This won't necessarily completely legalize the operation, but it will
1337 // more effectively move in the right direction and prevent falling down
1338 // to scalarization in many cases due to the input vector being split too
1340 unsigned NumElements = SrcVT.getVectorNumElements();
1341 if ((NumElements & 1) == 0 &&
1342 SrcVT.getSizeInBits() * 2 < DestVT.getSizeInBits()) {
1343 LLVMContext &Ctx = *DAG.getContext();
1344 EVT NewSrcVT = SrcVT.widenIntegerVectorElementType(Ctx);
1345 EVT SplitSrcVT = SrcVT.getHalfNumVectorElementsVT(Ctx);
1347 EVT SplitLoVT, SplitHiVT;
1348 std::tie(SplitLoVT, SplitHiVT) = DAG.GetSplitDestVTs(NewSrcVT);
1349 if (TLI.isTypeLegal(SrcVT) && !TLI.isTypeLegal(SplitSrcVT) &&
1350 TLI.isTypeLegal(NewSrcVT) && TLI.isTypeLegal(SplitLoVT)) {
1351 DEBUG(dbgs() << "Split vector extend via incremental extend:";
1352 N->dump(&DAG); dbgs() << "\n");
1353 // Extend the source vector by one step.
1355 DAG.getNode(N->getOpcode(), dl, NewSrcVT, N->getOperand(0));
1356 // Get the low and high halves of the new, extended one step, vector.
1357 std::tie(Lo, Hi) = DAG.SplitVector(NewSrc, dl);
1358 // Extend those vector halves the rest of the way.
1359 Lo = DAG.getNode(N->getOpcode(), dl, LoVT, Lo);
1360 Hi = DAG.getNode(N->getOpcode(), dl, HiVT, Hi);
1364 // Fall back to the generic unary operator splitting otherwise.
1365 SplitVecRes_UnaryOp(N, Lo, Hi);
1368 void DAGTypeLegalizer::SplitVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N,
1369 SDValue &Lo, SDValue &Hi) {
1370 // The low and high parts of the original input give four input vectors.
1373 GetSplitVector(N->getOperand(0), Inputs[0], Inputs[1]);
1374 GetSplitVector(N->getOperand(1), Inputs[2], Inputs[3]);
1375 EVT NewVT = Inputs[0].getValueType();
1376 unsigned NewElts = NewVT.getVectorNumElements();
1378 // If Lo or Hi uses elements from at most two of the four input vectors, then
1379 // express it as a vector shuffle of those two inputs. Otherwise extract the
1380 // input elements by hand and construct the Lo/Hi output using a BUILD_VECTOR.
1381 SmallVector<int, 16> Ops;
1382 for (unsigned High = 0; High < 2; ++High) {
1383 SDValue &Output = High ? Hi : Lo;
1385 // Build a shuffle mask for the output, discovering on the fly which
1386 // input vectors to use as shuffle operands (recorded in InputUsed).
1387 // If building a suitable shuffle vector proves too hard, then bail
1388 // out with useBuildVector set.
1389 unsigned InputUsed[2] = { -1U, -1U }; // Not yet discovered.
1390 unsigned FirstMaskIdx = High * NewElts;
1391 bool useBuildVector = false;
1392 for (unsigned MaskOffset = 0; MaskOffset < NewElts; ++MaskOffset) {
1393 // The mask element. This indexes into the input.
1394 int Idx = N->getMaskElt(FirstMaskIdx + MaskOffset);
1396 // The input vector this mask element indexes into.
1397 unsigned Input = (unsigned)Idx / NewElts;
1399 if (Input >= array_lengthof(Inputs)) {
1400 // The mask element does not index into any input vector.
1405 // Turn the index into an offset from the start of the input vector.
1406 Idx -= Input * NewElts;
1408 // Find or create a shuffle vector operand to hold this input.
1410 for (OpNo = 0; OpNo < array_lengthof(InputUsed); ++OpNo) {
1411 if (InputUsed[OpNo] == Input) {
1412 // This input vector is already an operand.
1414 } else if (InputUsed[OpNo] == -1U) {
1415 // Create a new operand for this input vector.
1416 InputUsed[OpNo] = Input;
1421 if (OpNo >= array_lengthof(InputUsed)) {
1422 // More than two input vectors used! Give up on trying to create a
1423 // shuffle vector. Insert all elements into a BUILD_VECTOR instead.
1424 useBuildVector = true;
1428 // Add the mask index for the new shuffle vector.
1429 Ops.push_back(Idx + OpNo * NewElts);
1432 if (useBuildVector) {
1433 EVT EltVT = NewVT.getVectorElementType();
1434 SmallVector<SDValue, 16> SVOps;
1436 // Extract the input elements by hand.
1437 for (unsigned MaskOffset = 0; MaskOffset < NewElts; ++MaskOffset) {
1438 // The mask element. This indexes into the input.
1439 int Idx = N->getMaskElt(FirstMaskIdx + MaskOffset);
1441 // The input vector this mask element indexes into.
1442 unsigned Input = (unsigned)Idx / NewElts;
1444 if (Input >= array_lengthof(Inputs)) {
1445 // The mask element is "undef" or indexes off the end of the input.
1446 SVOps.push_back(DAG.getUNDEF(EltVT));
1450 // Turn the index into an offset from the start of the input vector.
1451 Idx -= Input * NewElts;
1453 // Extract the vector element by hand.
1454 SVOps.push_back(DAG.getNode(
1455 ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Inputs[Input],
1456 DAG.getConstant(Idx, dl, TLI.getVectorIdxTy(DAG.getDataLayout()))));
1459 // Construct the Lo/Hi output using a BUILD_VECTOR.
1460 Output = DAG.getBuildVector(NewVT, dl, SVOps);
1461 } else if (InputUsed[0] == -1U) {
1462 // No input vectors were used! The result is undefined.
1463 Output = DAG.getUNDEF(NewVT);
1465 SDValue Op0 = Inputs[InputUsed[0]];
1466 // If only one input was used, use an undefined vector for the other.
1467 SDValue Op1 = InputUsed[1] == -1U ?
1468 DAG.getUNDEF(NewVT) : Inputs[InputUsed[1]];
1469 // At least one input vector was used. Create a new shuffle vector.
1470 Output = DAG.getVectorShuffle(NewVT, dl, Op0, Op1, Ops);
1478 //===----------------------------------------------------------------------===//
1479 // Operand Vector Splitting
1480 //===----------------------------------------------------------------------===//
1482 /// This method is called when the specified operand of the specified node is
1483 /// found to need vector splitting. At this point, all of the result types of
1484 /// the node are known to be legal, but other operands of the node may need
1485 /// legalization as well as the specified one.
1486 bool DAGTypeLegalizer::SplitVectorOperand(SDNode *N, unsigned OpNo) {
1487 DEBUG(dbgs() << "Split node operand: ";
1490 SDValue Res = SDValue();
1492 // See if the target wants to custom split this node.
1493 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
1496 if (!Res.getNode()) {
1497 switch (N->getOpcode()) {
1500 dbgs() << "SplitVectorOperand Op #" << OpNo << ": ";
1504 report_fatal_error("Do not know how to split this operator's "
1507 case ISD::SETCC: Res = SplitVecOp_VSETCC(N); break;
1508 case ISD::BITCAST: Res = SplitVecOp_BITCAST(N); break;
1509 case ISD::EXTRACT_SUBVECTOR: Res = SplitVecOp_EXTRACT_SUBVECTOR(N); break;
1510 case ISD::EXTRACT_VECTOR_ELT:Res = SplitVecOp_EXTRACT_VECTOR_ELT(N); break;
1511 case ISD::CONCAT_VECTORS: Res = SplitVecOp_CONCAT_VECTORS(N); break;
1513 Res = SplitVecOp_TruncateHelper(N);
1515 case ISD::FP_ROUND: Res = SplitVecOp_FP_ROUND(N); break;
1516 case ISD::FCOPYSIGN: Res = SplitVecOp_FCOPYSIGN(N); break;
1518 Res = SplitVecOp_STORE(cast<StoreSDNode>(N), OpNo);
1521 Res = SplitVecOp_MSTORE(cast<MaskedStoreSDNode>(N), OpNo);
1524 Res = SplitVecOp_MSCATTER(cast<MaskedScatterSDNode>(N), OpNo);
1527 Res = SplitVecOp_MGATHER(cast<MaskedGatherSDNode>(N), OpNo);
1530 Res = SplitVecOp_VSELECT(N, OpNo);
1532 case ISD::FP_TO_SINT:
1533 case ISD::FP_TO_UINT:
1534 if (N->getValueType(0).bitsLT(N->getOperand(0)->getValueType(0)))
1535 Res = SplitVecOp_TruncateHelper(N);
1537 Res = SplitVecOp_UnaryOp(N);
1539 case ISD::SINT_TO_FP:
1540 case ISD::UINT_TO_FP:
1541 if (N->getValueType(0).bitsLT(N->getOperand(0)->getValueType(0)))
1542 Res = SplitVecOp_TruncateHelper(N);
1544 Res = SplitVecOp_UnaryOp(N);
1549 case ISD::FP_EXTEND:
1550 case ISD::SIGN_EXTEND:
1551 case ISD::ZERO_EXTEND:
1552 case ISD::ANY_EXTEND:
1554 case ISD::FCANONICALIZE:
1555 Res = SplitVecOp_UnaryOp(N);
1558 case ISD::ANY_EXTEND_VECTOR_INREG:
1559 case ISD::SIGN_EXTEND_VECTOR_INREG:
1560 case ISD::ZERO_EXTEND_VECTOR_INREG:
1561 Res = SplitVecOp_ExtVecInRegOp(N);
1564 case ISD::VECREDUCE_FADD:
1565 case ISD::VECREDUCE_FMUL:
1566 case ISD::VECREDUCE_ADD:
1567 case ISD::VECREDUCE_MUL:
1568 case ISD::VECREDUCE_AND:
1569 case ISD::VECREDUCE_OR:
1570 case ISD::VECREDUCE_XOR:
1571 case ISD::VECREDUCE_SMAX:
1572 case ISD::VECREDUCE_SMIN:
1573 case ISD::VECREDUCE_UMAX:
1574 case ISD::VECREDUCE_UMIN:
1575 case ISD::VECREDUCE_FMAX:
1576 case ISD::VECREDUCE_FMIN:
1577 Res = SplitVecOp_VECREDUCE(N, OpNo);
1582 // If the result is null, the sub-method took care of registering results etc.
1583 if (!Res.getNode()) return false;
1585 // If the result is N, the sub-method updated N in place. Tell the legalizer
1587 if (Res.getNode() == N)
1590 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1591 "Invalid operand expansion");
1593 ReplaceValueWith(SDValue(N, 0), Res);
1597 SDValue DAGTypeLegalizer::SplitVecOp_VSELECT(SDNode *N, unsigned OpNo) {
1598 // The only possibility for an illegal operand is the mask, since result type
1599 // legalization would have handled this node already otherwise.
1600 assert(OpNo == 0 && "Illegal operand must be mask");
1602 SDValue Mask = N->getOperand(0);
1603 SDValue Src0 = N->getOperand(1);
1604 SDValue Src1 = N->getOperand(2);
1605 EVT Src0VT = Src0.getValueType();
1607 assert(Mask.getValueType().isVector() && "VSELECT without a vector mask?");
1610 GetSplitVector(N->getOperand(0), Lo, Hi);
1611 assert(Lo.getValueType() == Hi.getValueType() &&
1612 "Lo and Hi have differing types");
1615 std::tie(LoOpVT, HiOpVT) = DAG.GetSplitDestVTs(Src0VT);
1616 assert(LoOpVT == HiOpVT && "Asymmetric vector split?");
1618 SDValue LoOp0, HiOp0, LoOp1, HiOp1, LoMask, HiMask;
1619 std::tie(LoOp0, HiOp0) = DAG.SplitVector(Src0, DL);
1620 std::tie(LoOp1, HiOp1) = DAG.SplitVector(Src1, DL);
1621 std::tie(LoMask, HiMask) = DAG.SplitVector(Mask, DL);
1624 DAG.getNode(ISD::VSELECT, DL, LoOpVT, LoMask, LoOp0, LoOp1);
1626 DAG.getNode(ISD::VSELECT, DL, HiOpVT, HiMask, HiOp0, HiOp1);
1628 return DAG.getNode(ISD::CONCAT_VECTORS, DL, Src0VT, LoSelect, HiSelect);
1631 SDValue DAGTypeLegalizer::SplitVecOp_VECREDUCE(SDNode *N, unsigned OpNo) {
1632 EVT ResVT = N->getValueType(0);
1636 SDValue VecOp = N->getOperand(OpNo);
1637 EVT VecVT = VecOp.getValueType();
1638 assert(VecVT.isVector() && "Can only split reduce vector operand");
1639 GetSplitVector(VecOp, Lo, Hi);
1641 std::tie(LoOpVT, HiOpVT) = DAG.GetSplitDestVTs(VecVT);
1643 bool NoNaN = N->getFlags().hasNoNaNs();
1644 unsigned CombineOpc = 0;
1645 switch (N->getOpcode()) {
1646 case ISD::VECREDUCE_FADD: CombineOpc = ISD::FADD; break;
1647 case ISD::VECREDUCE_FMUL: CombineOpc = ISD::FMUL; break;
1648 case ISD::VECREDUCE_ADD: CombineOpc = ISD::ADD; break;
1649 case ISD::VECREDUCE_MUL: CombineOpc = ISD::MUL; break;
1650 case ISD::VECREDUCE_AND: CombineOpc = ISD::AND; break;
1651 case ISD::VECREDUCE_OR: CombineOpc = ISD::OR; break;
1652 case ISD::VECREDUCE_XOR: CombineOpc = ISD::XOR; break;
1653 case ISD::VECREDUCE_SMAX: CombineOpc = ISD::SMAX; break;
1654 case ISD::VECREDUCE_SMIN: CombineOpc = ISD::SMIN; break;
1655 case ISD::VECREDUCE_UMAX: CombineOpc = ISD::UMAX; break;
1656 case ISD::VECREDUCE_UMIN: CombineOpc = ISD::UMIN; break;
1657 case ISD::VECREDUCE_FMAX:
1658 CombineOpc = NoNaN ? ISD::FMAXNUM : ISD::FMAXNAN;
1660 case ISD::VECREDUCE_FMIN:
1661 CombineOpc = NoNaN ? ISD::FMINNUM : ISD::FMINNAN;
1664 llvm_unreachable("Unexpected reduce ISD node");
1667 // Use the appropriate scalar instruction on the split subvectors before
1668 // reducing the now partially reduced smaller vector.
1669 SDValue Partial = DAG.getNode(CombineOpc, dl, LoOpVT, Lo, Hi);
1670 return DAG.getNode(N->getOpcode(), dl, ResVT, Partial);
1673 SDValue DAGTypeLegalizer::SplitVecOp_UnaryOp(SDNode *N) {
1674 // The result has a legal vector type, but the input needs splitting.
1675 EVT ResVT = N->getValueType(0);
1678 GetSplitVector(N->getOperand(0), Lo, Hi);
1679 EVT InVT = Lo.getValueType();
1681 EVT OutVT = EVT::getVectorVT(*DAG.getContext(), ResVT.getVectorElementType(),
1682 InVT.getVectorNumElements());
1684 Lo = DAG.getNode(N->getOpcode(), dl, OutVT, Lo);
1685 Hi = DAG.getNode(N->getOpcode(), dl, OutVT, Hi);
1687 return DAG.getNode(ISD::CONCAT_VECTORS, dl, ResVT, Lo, Hi);
1690 SDValue DAGTypeLegalizer::SplitVecOp_BITCAST(SDNode *N) {
1691 // For example, i64 = BITCAST v4i16 on alpha. Typically the vector will
1692 // end up being split all the way down to individual components. Convert the
1693 // split pieces into integers and reassemble.
1695 GetSplitVector(N->getOperand(0), Lo, Hi);
1696 Lo = BitConvertToInteger(Lo);
1697 Hi = BitConvertToInteger(Hi);
1699 if (DAG.getDataLayout().isBigEndian())
1702 return DAG.getNode(ISD::BITCAST, SDLoc(N), N->getValueType(0),
1703 JoinIntegers(Lo, Hi));
1706 SDValue DAGTypeLegalizer::SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N) {
1707 // We know that the extracted result type is legal.
1708 EVT SubVT = N->getValueType(0);
1709 SDValue Idx = N->getOperand(1);
1712 GetSplitVector(N->getOperand(0), Lo, Hi);
1714 uint64_t LoElts = Lo.getValueType().getVectorNumElements();
1715 uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
1717 if (IdxVal < LoElts) {
1718 assert(IdxVal + SubVT.getVectorNumElements() <= LoElts &&
1719 "Extracted subvector crosses vector split!");
1720 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, SubVT, Lo, Idx);
1722 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, SubVT, Hi,
1723 DAG.getConstant(IdxVal - LoElts, dl,
1724 Idx.getValueType()));
1728 SDValue DAGTypeLegalizer::SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N) {
1729 SDValue Vec = N->getOperand(0);
1730 SDValue Idx = N->getOperand(1);
1731 EVT VecVT = Vec.getValueType();
1733 if (isa<ConstantSDNode>(Idx)) {
1734 uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
1735 assert(IdxVal < VecVT.getVectorNumElements() && "Invalid vector index!");
1738 GetSplitVector(Vec, Lo, Hi);
1740 uint64_t LoElts = Lo.getValueType().getVectorNumElements();
1742 if (IdxVal < LoElts)
1743 return SDValue(DAG.UpdateNodeOperands(N, Lo, Idx), 0);
1744 return SDValue(DAG.UpdateNodeOperands(N, Hi,
1745 DAG.getConstant(IdxVal - LoElts, SDLoc(N),
1746 Idx.getValueType())), 0);
1749 // See if the target wants to custom expand this node.
1750 if (CustomLowerNode(N, N->getValueType(0), true))
1753 // Make the vector elements byte-addressable if they aren't already.
1755 EVT EltVT = VecVT.getVectorElementType();
1756 if (EltVT.getSizeInBits() < 8) {
1757 SmallVector<SDValue, 4> ElementOps;
1758 for (unsigned i = 0; i < VecVT.getVectorNumElements(); ++i) {
1759 ElementOps.push_back(DAG.getAnyExtOrTrunc(
1760 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Vec,
1761 DAG.getConstant(i, dl, MVT::i8)),
1766 VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT,
1767 VecVT.getVectorNumElements());
1768 Vec = DAG.getBuildVector(VecVT, dl, ElementOps);
1771 // Store the vector to the stack.
1772 SDValue StackPtr = DAG.CreateStackTemporary(VecVT);
1774 DAG.getStore(DAG.getEntryNode(), dl, Vec, StackPtr, MachinePointerInfo());
1776 // Load back the required element.
1777 StackPtr = TLI.getVectorElementPointer(DAG, StackPtr, VecVT, Idx);
1778 return DAG.getExtLoad(ISD::EXTLOAD, dl, N->getValueType(0), Store, StackPtr,
1779 MachinePointerInfo(), EltVT);
1782 SDValue DAGTypeLegalizer::SplitVecOp_ExtVecInRegOp(SDNode *N) {
1785 // *_EXTEND_VECTOR_INREG only reference the lower half of the input, so
1786 // splitting the result has the same effect as splitting the input operand.
1787 SplitVecRes_ExtVecInRegOp(N, Lo, Hi);
1789 return DAG.getNode(ISD::CONCAT_VECTORS, SDLoc(N), N->getValueType(0), Lo, Hi);
1792 SDValue DAGTypeLegalizer::SplitVecOp_MGATHER(MaskedGatherSDNode *MGT,
1796 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(MGT->getValueType(0));
1798 SDValue Ch = MGT->getChain();
1799 SDValue Ptr = MGT->getBasePtr();
1800 SDValue Index = MGT->getIndex();
1801 SDValue Mask = MGT->getMask();
1802 SDValue Src0 = MGT->getValue();
1803 unsigned Alignment = MGT->getOriginalAlignment();
1805 SDValue MaskLo, MaskHi;
1806 if (getTypeAction(Mask.getValueType()) == TargetLowering::TypeSplitVector)
1807 // Split Mask operand
1808 GetSplitVector(Mask, MaskLo, MaskHi);
1810 std::tie(MaskLo, MaskHi) = DAG.SplitVector(Mask, dl);
1812 EVT MemoryVT = MGT->getMemoryVT();
1813 EVT LoMemVT, HiMemVT;
1814 std::tie(LoMemVT, HiMemVT) = DAG.GetSplitDestVTs(MemoryVT);
1816 SDValue Src0Lo, Src0Hi;
1817 if (getTypeAction(Src0.getValueType()) == TargetLowering::TypeSplitVector)
1818 GetSplitVector(Src0, Src0Lo, Src0Hi);
1820 std::tie(Src0Lo, Src0Hi) = DAG.SplitVector(Src0, dl);
1822 SDValue IndexHi, IndexLo;
1823 if (getTypeAction(Index.getValueType()) == TargetLowering::TypeSplitVector)
1824 GetSplitVector(Index, IndexLo, IndexHi);
1826 std::tie(IndexLo, IndexHi) = DAG.SplitVector(Index, dl);
1828 MachineMemOperand *MMO = DAG.getMachineFunction().
1829 getMachineMemOperand(MGT->getPointerInfo(),
1830 MachineMemOperand::MOLoad, LoMemVT.getStoreSize(),
1831 Alignment, MGT->getAAInfo(), MGT->getRanges());
1833 SDValue OpsLo[] = {Ch, Src0Lo, MaskLo, Ptr, IndexLo};
1834 SDValue Lo = DAG.getMaskedGather(DAG.getVTList(LoVT, MVT::Other), LoVT, dl,
1837 MMO = DAG.getMachineFunction().
1838 getMachineMemOperand(MGT->getPointerInfo(),
1839 MachineMemOperand::MOLoad, HiMemVT.getStoreSize(),
1840 Alignment, MGT->getAAInfo(),
1843 SDValue OpsHi[] = {Ch, Src0Hi, MaskHi, Ptr, IndexHi};
1844 SDValue Hi = DAG.getMaskedGather(DAG.getVTList(HiVT, MVT::Other), HiVT, dl,
1847 // Build a factor node to remember that this load is independent of the
1849 Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
1852 // Legalize the chain result - switch anything that used the old chain to
1854 ReplaceValueWith(SDValue(MGT, 1), Ch);
1856 SDValue Res = DAG.getNode(ISD::CONCAT_VECTORS, dl, MGT->getValueType(0), Lo,
1858 ReplaceValueWith(SDValue(MGT, 0), Res);
1862 SDValue DAGTypeLegalizer::SplitVecOp_MSTORE(MaskedStoreSDNode *N,
1864 SDValue Ch = N->getChain();
1865 SDValue Ptr = N->getBasePtr();
1866 SDValue Mask = N->getMask();
1867 SDValue Data = N->getValue();
1868 EVT MemoryVT = N->getMemoryVT();
1869 unsigned Alignment = N->getOriginalAlignment();
1872 EVT LoMemVT, HiMemVT;
1873 std::tie(LoMemVT, HiMemVT) = DAG.GetSplitDestVTs(MemoryVT);
1875 SDValue DataLo, DataHi;
1876 if (getTypeAction(Data.getValueType()) == TargetLowering::TypeSplitVector)
1877 // Split Data operand
1878 GetSplitVector(Data, DataLo, DataHi);
1880 std::tie(DataLo, DataHi) = DAG.SplitVector(Data, DL);
1882 SDValue MaskLo, MaskHi;
1883 if (getTypeAction(Mask.getValueType()) == TargetLowering::TypeSplitVector)
1884 // Split Mask operand
1885 GetSplitVector(Mask, MaskLo, MaskHi);
1887 std::tie(MaskLo, MaskHi) = DAG.SplitVector(Mask, DL);
1889 MaskLo = PromoteTargetBoolean(MaskLo, DataLo.getValueType());
1890 MaskHi = PromoteTargetBoolean(MaskHi, DataHi.getValueType());
1892 // if Alignment is equal to the vector size,
1893 // take the half of it for the second part
1894 unsigned SecondHalfAlignment =
1895 (Alignment == Data->getValueType(0).getSizeInBits()/8) ?
1896 Alignment/2 : Alignment;
1899 MachineMemOperand *MMO = DAG.getMachineFunction().
1900 getMachineMemOperand(N->getPointerInfo(),
1901 MachineMemOperand::MOStore, LoMemVT.getStoreSize(),
1902 Alignment, N->getAAInfo(), N->getRanges());
1904 Lo = DAG.getMaskedStore(Ch, DL, DataLo, Ptr, MaskLo, LoMemVT, MMO,
1905 N->isTruncatingStore(),
1906 N->isCompressingStore());
1908 Ptr = TLI.IncrementMemoryAddress(Ptr, MaskLo, DL, LoMemVT, DAG,
1909 N->isCompressingStore());
1910 MMO = DAG.getMachineFunction().
1911 getMachineMemOperand(N->getPointerInfo(),
1912 MachineMemOperand::MOStore, HiMemVT.getStoreSize(),
1913 SecondHalfAlignment, N->getAAInfo(), N->getRanges());
1915 Hi = DAG.getMaskedStore(Ch, DL, DataHi, Ptr, MaskHi, HiMemVT, MMO,
1916 N->isTruncatingStore(), N->isCompressingStore());
1918 // Build a factor node to remember that this store is independent of the
1920 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Lo, Hi);
1923 SDValue DAGTypeLegalizer::SplitVecOp_MSCATTER(MaskedScatterSDNode *N,
1925 SDValue Ch = N->getChain();
1926 SDValue Ptr = N->getBasePtr();
1927 SDValue Mask = N->getMask();
1928 SDValue Index = N->getIndex();
1929 SDValue Data = N->getValue();
1930 EVT MemoryVT = N->getMemoryVT();
1931 unsigned Alignment = N->getOriginalAlignment();
1934 // Split all operands
1935 EVT LoMemVT, HiMemVT;
1936 std::tie(LoMemVT, HiMemVT) = DAG.GetSplitDestVTs(MemoryVT);
1938 SDValue DataLo, DataHi;
1939 if (getTypeAction(Data.getValueType()) == TargetLowering::TypeSplitVector)
1940 // Split Data operand
1941 GetSplitVector(Data, DataLo, DataHi);
1943 std::tie(DataLo, DataHi) = DAG.SplitVector(Data, DL);
1945 SDValue MaskLo, MaskHi;
1946 if (getTypeAction(Mask.getValueType()) == TargetLowering::TypeSplitVector)
1947 // Split Mask operand
1948 GetSplitVector(Mask, MaskLo, MaskHi);
1950 std::tie(MaskLo, MaskHi) = DAG.SplitVector(Mask, DL);
1952 SDValue IndexHi, IndexLo;
1953 if (getTypeAction(Index.getValueType()) == TargetLowering::TypeSplitVector)
1954 GetSplitVector(Index, IndexLo, IndexHi);
1956 std::tie(IndexLo, IndexHi) = DAG.SplitVector(Index, DL);
1959 MachineMemOperand *MMO = DAG.getMachineFunction().
1960 getMachineMemOperand(N->getPointerInfo(),
1961 MachineMemOperand::MOStore, LoMemVT.getStoreSize(),
1962 Alignment, N->getAAInfo(), N->getRanges());
1964 SDValue OpsLo[] = {Ch, DataLo, MaskLo, Ptr, IndexLo};
1965 Lo = DAG.getMaskedScatter(DAG.getVTList(MVT::Other), DataLo.getValueType(),
1968 MMO = DAG.getMachineFunction().
1969 getMachineMemOperand(N->getPointerInfo(),
1970 MachineMemOperand::MOStore, HiMemVT.getStoreSize(),
1971 Alignment, N->getAAInfo(), N->getRanges());
1973 SDValue OpsHi[] = {Ch, DataHi, MaskHi, Ptr, IndexHi};
1974 Hi = DAG.getMaskedScatter(DAG.getVTList(MVT::Other), DataHi.getValueType(),
1977 // Build a factor node to remember that this store is independent of the
1979 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Lo, Hi);
1982 SDValue DAGTypeLegalizer::SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo) {
1983 assert(N->isUnindexed() && "Indexed store of vector?");
1984 assert(OpNo == 1 && "Can only split the stored value");
1987 bool isTruncating = N->isTruncatingStore();
1988 SDValue Ch = N->getChain();
1989 SDValue Ptr = N->getBasePtr();
1990 EVT MemoryVT = N->getMemoryVT();
1991 unsigned Alignment = N->getOriginalAlignment();
1992 MachineMemOperand::Flags MMOFlags = N->getMemOperand()->getFlags();
1993 AAMDNodes AAInfo = N->getAAInfo();
1995 GetSplitVector(N->getOperand(1), Lo, Hi);
1997 EVT LoMemVT, HiMemVT;
1998 std::tie(LoMemVT, HiMemVT) = DAG.GetSplitDestVTs(MemoryVT);
2000 unsigned IncrementSize = LoMemVT.getSizeInBits()/8;
2003 Lo = DAG.getTruncStore(Ch, DL, Lo, Ptr, N->getPointerInfo(), LoMemVT,
2004 Alignment, MMOFlags, AAInfo);
2006 Lo = DAG.getStore(Ch, DL, Lo, Ptr, N->getPointerInfo(), Alignment, MMOFlags,
2009 // Increment the pointer to the other half.
2010 Ptr = DAG.getNode(ISD::ADD, DL, Ptr.getValueType(), Ptr,
2011 DAG.getConstant(IncrementSize, DL, Ptr.getValueType()));
2014 Hi = DAG.getTruncStore(Ch, DL, Hi, Ptr,
2015 N->getPointerInfo().getWithOffset(IncrementSize),
2016 HiMemVT, Alignment, MMOFlags, AAInfo);
2018 Hi = DAG.getStore(Ch, DL, Hi, Ptr,
2019 N->getPointerInfo().getWithOffset(IncrementSize),
2020 Alignment, MMOFlags, AAInfo);
2022 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Lo, Hi);
2025 SDValue DAGTypeLegalizer::SplitVecOp_CONCAT_VECTORS(SDNode *N) {
2028 // The input operands all must have the same type, and we know the result
2029 // type is valid. Convert this to a buildvector which extracts all the
2031 // TODO: If the input elements are power-two vectors, we could convert this to
2032 // a new CONCAT_VECTORS node with elements that are half-wide.
2033 SmallVector<SDValue, 32> Elts;
2034 EVT EltVT = N->getValueType(0).getVectorElementType();
2035 for (const SDValue &Op : N->op_values()) {
2036 for (unsigned i = 0, e = Op.getValueType().getVectorNumElements();
2038 Elts.push_back(DAG.getNode(
2039 ISD::EXTRACT_VECTOR_ELT, DL, EltVT, Op,
2040 DAG.getConstant(i, DL, TLI.getVectorIdxTy(DAG.getDataLayout()))));
2044 return DAG.getBuildVector(N->getValueType(0), DL, Elts);
2047 SDValue DAGTypeLegalizer::SplitVecOp_TruncateHelper(SDNode *N) {
2048 // The result type is legal, but the input type is illegal. If splitting
2049 // ends up with the result type of each half still being legal, just
2050 // do that. If, however, that would result in an illegal result type,
2051 // we can try to get more clever with power-two vectors. Specifically,
2052 // split the input type, but also widen the result element size, then
2053 // concatenate the halves and truncate again. For example, consider a target
2054 // where v8i8 is legal and v8i32 is not (ARM, which doesn't have 256-bit
2055 // vectors). To perform a "%res = v8i8 trunc v8i32 %in" we do:
2056 // %inlo = v4i32 extract_subvector %in, 0
2057 // %inhi = v4i32 extract_subvector %in, 4
2058 // %lo16 = v4i16 trunc v4i32 %inlo
2059 // %hi16 = v4i16 trunc v4i32 %inhi
2060 // %in16 = v8i16 concat_vectors v4i16 %lo16, v4i16 %hi16
2061 // %res = v8i8 trunc v8i16 %in16
2063 // Without this transform, the original truncate would end up being
2064 // scalarized, which is pretty much always a last resort.
2065 SDValue InVec = N->getOperand(0);
2066 EVT InVT = InVec->getValueType(0);
2067 EVT OutVT = N->getValueType(0);
2068 unsigned NumElements = OutVT.getVectorNumElements();
2069 bool IsFloat = OutVT.isFloatingPoint();
2071 // Widening should have already made sure this is a power-two vector
2072 // if we're trying to split it at all. assert() that's true, just in case.
2073 assert(!(NumElements & 1) && "Splitting vector, but not in half!");
2075 unsigned InElementSize = InVT.getScalarSizeInBits();
2076 unsigned OutElementSize = OutVT.getScalarSizeInBits();
2078 // If the input elements are only 1/2 the width of the result elements,
2079 // just use the normal splitting. Our trick only work if there's room
2080 // to split more than once.
2081 if (InElementSize <= OutElementSize * 2)
2082 return SplitVecOp_UnaryOp(N);
2085 // Extract the halves of the input via extract_subvector.
2086 SDValue InLoVec, InHiVec;
2087 std::tie(InLoVec, InHiVec) = DAG.SplitVector(InVec, DL);
2088 // Truncate them to 1/2 the element size.
2089 EVT HalfElementVT = IsFloat ?
2090 EVT::getFloatingPointVT(InElementSize/2) :
2091 EVT::getIntegerVT(*DAG.getContext(), InElementSize/2);
2092 EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), HalfElementVT,
2094 SDValue HalfLo = DAG.getNode(N->getOpcode(), DL, HalfVT, InLoVec);
2095 SDValue HalfHi = DAG.getNode(N->getOpcode(), DL, HalfVT, InHiVec);
2096 // Concatenate them to get the full intermediate truncation result.
2097 EVT InterVT = EVT::getVectorVT(*DAG.getContext(), HalfElementVT, NumElements);
2098 SDValue InterVec = DAG.getNode(ISD::CONCAT_VECTORS, DL, InterVT, HalfLo,
2100 // Now finish up by truncating all the way down to the original result
2101 // type. This should normally be something that ends up being legal directly,
2102 // but in theory if a target has very wide vectors and an annoyingly
2103 // restricted set of legal types, this split can chain to build things up.
2105 ? DAG.getNode(ISD::FP_ROUND, DL, OutVT, InterVec,
2106 DAG.getTargetConstant(
2107 0, DL, TLI.getPointerTy(DAG.getDataLayout())))
2108 : DAG.getNode(ISD::TRUNCATE, DL, OutVT, InterVec);
2111 SDValue DAGTypeLegalizer::SplitVecOp_VSETCC(SDNode *N) {
2112 assert(N->getValueType(0).isVector() &&
2113 N->getOperand(0).getValueType().isVector() &&
2114 "Operand types must be vectors");
2115 // The result has a legal vector type, but the input needs splitting.
2116 SDValue Lo0, Hi0, Lo1, Hi1, LoRes, HiRes;
2118 GetSplitVector(N->getOperand(0), Lo0, Hi0);
2119 GetSplitVector(N->getOperand(1), Lo1, Hi1);
2120 unsigned PartElements = Lo0.getValueType().getVectorNumElements();
2121 EVT PartResVT = EVT::getVectorVT(*DAG.getContext(), MVT::i1, PartElements);
2122 EVT WideResVT = EVT::getVectorVT(*DAG.getContext(), MVT::i1, 2*PartElements);
2124 LoRes = DAG.getNode(ISD::SETCC, DL, PartResVT, Lo0, Lo1, N->getOperand(2));
2125 HiRes = DAG.getNode(ISD::SETCC, DL, PartResVT, Hi0, Hi1, N->getOperand(2));
2126 SDValue Con = DAG.getNode(ISD::CONCAT_VECTORS, DL, WideResVT, LoRes, HiRes);
2127 return PromoteTargetBoolean(Con, N->getValueType(0));
2131 SDValue DAGTypeLegalizer::SplitVecOp_FP_ROUND(SDNode *N) {
2132 // The result has a legal vector type, but the input needs splitting.
2133 EVT ResVT = N->getValueType(0);
2136 GetSplitVector(N->getOperand(0), Lo, Hi);
2137 EVT InVT = Lo.getValueType();
2139 EVT OutVT = EVT::getVectorVT(*DAG.getContext(), ResVT.getVectorElementType(),
2140 InVT.getVectorNumElements());
2142 Lo = DAG.getNode(ISD::FP_ROUND, DL, OutVT, Lo, N->getOperand(1));
2143 Hi = DAG.getNode(ISD::FP_ROUND, DL, OutVT, Hi, N->getOperand(1));
2145 return DAG.getNode(ISD::CONCAT_VECTORS, DL, ResVT, Lo, Hi);
2148 SDValue DAGTypeLegalizer::SplitVecOp_FCOPYSIGN(SDNode *N) {
2149 // The result (and the first input) has a legal vector type, but the second
2150 // input needs splitting.
2151 return DAG.UnrollVectorOp(N, N->getValueType(0).getVectorNumElements());
2155 //===----------------------------------------------------------------------===//
2156 // Result Vector Widening
2157 //===----------------------------------------------------------------------===//
2159 void DAGTypeLegalizer::WidenVectorResult(SDNode *N, unsigned ResNo) {
2160 DEBUG(dbgs() << "Widen node result " << ResNo << ": ";
2164 // See if the target wants to custom widen this node.
2165 if (CustomWidenLowerNode(N, N->getValueType(ResNo)))
2168 SDValue Res = SDValue();
2169 switch (N->getOpcode()) {
2172 dbgs() << "WidenVectorResult #" << ResNo << ": ";
2176 llvm_unreachable("Do not know how to widen the result of this operator!");
2178 case ISD::MERGE_VALUES: Res = WidenVecRes_MERGE_VALUES(N, ResNo); break;
2179 case ISD::BITCAST: Res = WidenVecRes_BITCAST(N); break;
2180 case ISD::BUILD_VECTOR: Res = WidenVecRes_BUILD_VECTOR(N); break;
2181 case ISD::CONCAT_VECTORS: Res = WidenVecRes_CONCAT_VECTORS(N); break;
2182 case ISD::EXTRACT_SUBVECTOR: Res = WidenVecRes_EXTRACT_SUBVECTOR(N); break;
2183 case ISD::FP_ROUND_INREG: Res = WidenVecRes_InregOp(N); break;
2184 case ISD::INSERT_VECTOR_ELT: Res = WidenVecRes_INSERT_VECTOR_ELT(N); break;
2185 case ISD::LOAD: Res = WidenVecRes_LOAD(N); break;
2186 case ISD::SCALAR_TO_VECTOR: Res = WidenVecRes_SCALAR_TO_VECTOR(N); break;
2187 case ISD::SIGN_EXTEND_INREG: Res = WidenVecRes_InregOp(N); break;
2189 case ISD::SELECT: Res = WidenVecRes_SELECT(N); break;
2190 case ISD::SELECT_CC: Res = WidenVecRes_SELECT_CC(N); break;
2191 case ISD::SETCC: Res = WidenVecRes_SETCC(N); break;
2192 case ISD::UNDEF: Res = WidenVecRes_UNDEF(N); break;
2193 case ISD::VECTOR_SHUFFLE:
2194 Res = WidenVecRes_VECTOR_SHUFFLE(cast<ShuffleVectorSDNode>(N));
2197 Res = WidenVecRes_MLOAD(cast<MaskedLoadSDNode>(N));
2200 Res = WidenVecRes_MGATHER(cast<MaskedGatherSDNode>(N));
2219 Res = WidenVecRes_Binary(N);
2232 Res = WidenVecRes_BinaryCanTrap(N);
2235 case ISD::FCOPYSIGN:
2236 Res = WidenVecRes_FCOPYSIGN(N);
2240 Res = WidenVecRes_POWI(N);
2246 Res = WidenVecRes_Shift(N);
2249 case ISD::ANY_EXTEND_VECTOR_INREG:
2250 case ISD::SIGN_EXTEND_VECTOR_INREG:
2251 case ISD::ZERO_EXTEND_VECTOR_INREG:
2252 Res = WidenVecRes_EXTEND_VECTOR_INREG(N);
2255 case ISD::ANY_EXTEND:
2256 case ISD::FP_EXTEND:
2258 case ISD::FP_TO_SINT:
2259 case ISD::FP_TO_UINT:
2260 case ISD::SIGN_EXTEND:
2261 case ISD::SINT_TO_FP:
2263 case ISD::UINT_TO_FP:
2264 case ISD::ZERO_EXTEND:
2265 Res = WidenVecRes_Convert(N);
2268 case ISD::BITREVERSE:
2282 case ISD::FNEARBYINT:
2289 Res = WidenVecRes_Unary(N);
2292 Res = WidenVecRes_Ternary(N);
2296 // If Res is null, the sub-method took care of registering the result.
2298 SetWidenedVector(SDValue(N, ResNo), Res);
2301 SDValue DAGTypeLegalizer::WidenVecRes_Ternary(SDNode *N) {
2302 // Ternary op widening.
2304 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2305 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
2306 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
2307 SDValue InOp3 = GetWidenedVector(N->getOperand(2));
2308 return DAG.getNode(N->getOpcode(), dl, WidenVT, InOp1, InOp2, InOp3);
2311 SDValue DAGTypeLegalizer::WidenVecRes_Binary(SDNode *N) {
2312 // Binary op widening.
2314 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2315 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
2316 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
2317 return DAG.getNode(N->getOpcode(), dl, WidenVT, InOp1, InOp2, N->getFlags());
2320 SDValue DAGTypeLegalizer::WidenVecRes_BinaryCanTrap(SDNode *N) {
2321 // Binary op widening for operations that can trap.
2322 unsigned Opcode = N->getOpcode();
2324 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2325 EVT WidenEltVT = WidenVT.getVectorElementType();
2327 unsigned NumElts = VT.getVectorNumElements();
2328 const SDNodeFlags Flags = N->getFlags();
2329 while (!TLI.isTypeLegal(VT) && NumElts != 1) {
2330 NumElts = NumElts / 2;
2331 VT = EVT::getVectorVT(*DAG.getContext(), WidenEltVT, NumElts);
2334 if (NumElts != 1 && !TLI.canOpTrap(N->getOpcode(), VT)) {
2335 // Operation doesn't trap so just widen as normal.
2336 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
2337 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
2338 return DAG.getNode(N->getOpcode(), dl, WidenVT, InOp1, InOp2, Flags);
2341 // No legal vector version so unroll the vector operation and then widen.
2343 return DAG.UnrollVectorOp(N, WidenVT.getVectorNumElements());
2345 // Since the operation can trap, apply operation on the original vector.
2347 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
2348 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
2349 unsigned CurNumElts = N->getValueType(0).getVectorNumElements();
2351 SmallVector<SDValue, 16> ConcatOps(CurNumElts);
2352 unsigned ConcatEnd = 0; // Current ConcatOps index.
2353 int Idx = 0; // Current Idx into input vectors.
2355 // NumElts := greatest legal vector size (at most WidenVT)
2356 // while (orig. vector has unhandled elements) {
2357 // take munches of size NumElts from the beginning and add to ConcatOps
2358 // NumElts := next smaller supported vector size or 1
2360 while (CurNumElts != 0) {
2361 while (CurNumElts >= NumElts) {
2362 SDValue EOp1 = DAG.getNode(
2363 ISD::EXTRACT_SUBVECTOR, dl, VT, InOp1,
2364 DAG.getConstant(Idx, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
2365 SDValue EOp2 = DAG.getNode(
2366 ISD::EXTRACT_SUBVECTOR, dl, VT, InOp2,
2367 DAG.getConstant(Idx, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
2368 ConcatOps[ConcatEnd++] = DAG.getNode(Opcode, dl, VT, EOp1, EOp2, Flags);
2370 CurNumElts -= NumElts;
2373 NumElts = NumElts / 2;
2374 VT = EVT::getVectorVT(*DAG.getContext(), WidenEltVT, NumElts);
2375 } while (!TLI.isTypeLegal(VT) && NumElts != 1);
2378 for (unsigned i = 0; i != CurNumElts; ++i, ++Idx) {
2379 SDValue EOp1 = DAG.getNode(
2380 ISD::EXTRACT_VECTOR_ELT, dl, WidenEltVT, InOp1,
2381 DAG.getConstant(Idx, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
2382 SDValue EOp2 = DAG.getNode(
2383 ISD::EXTRACT_VECTOR_ELT, dl, WidenEltVT, InOp2,
2384 DAG.getConstant(Idx, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
2385 ConcatOps[ConcatEnd++] = DAG.getNode(Opcode, dl, WidenEltVT,
2392 // Check to see if we have a single operation with the widen type.
2393 if (ConcatEnd == 1) {
2394 VT = ConcatOps[0].getValueType();
2396 return ConcatOps[0];
2399 // while (Some element of ConcatOps is not of type MaxVT) {
2400 // From the end of ConcatOps, collect elements of the same type and put
2401 // them into an op of the next larger supported type
2403 while (ConcatOps[ConcatEnd-1].getValueType() != MaxVT) {
2404 Idx = ConcatEnd - 1;
2405 VT = ConcatOps[Idx--].getValueType();
2406 while (Idx >= 0 && ConcatOps[Idx].getValueType() == VT)
2409 int NextSize = VT.isVector() ? VT.getVectorNumElements() : 1;
2413 NextVT = EVT::getVectorVT(*DAG.getContext(), WidenEltVT, NextSize);
2414 } while (!TLI.isTypeLegal(NextVT));
2416 if (!VT.isVector()) {
2417 // Scalar type, create an INSERT_VECTOR_ELEMENT of type NextVT
2418 SDValue VecOp = DAG.getUNDEF(NextVT);
2419 unsigned NumToInsert = ConcatEnd - Idx - 1;
2420 for (unsigned i = 0, OpIdx = Idx+1; i < NumToInsert; i++, OpIdx++) {
2421 VecOp = DAG.getNode(
2422 ISD::INSERT_VECTOR_ELT, dl, NextVT, VecOp, ConcatOps[OpIdx],
2423 DAG.getConstant(i, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
2425 ConcatOps[Idx+1] = VecOp;
2426 ConcatEnd = Idx + 2;
2428 // Vector type, create a CONCAT_VECTORS of type NextVT
2429 SDValue undefVec = DAG.getUNDEF(VT);
2430 unsigned OpsToConcat = NextSize/VT.getVectorNumElements();
2431 SmallVector<SDValue, 16> SubConcatOps(OpsToConcat);
2432 unsigned RealVals = ConcatEnd - Idx - 1;
2433 unsigned SubConcatEnd = 0;
2434 unsigned SubConcatIdx = Idx + 1;
2435 while (SubConcatEnd < RealVals)
2436 SubConcatOps[SubConcatEnd++] = ConcatOps[++Idx];
2437 while (SubConcatEnd < OpsToConcat)
2438 SubConcatOps[SubConcatEnd++] = undefVec;
2439 ConcatOps[SubConcatIdx] = DAG.getNode(ISD::CONCAT_VECTORS, dl,
2440 NextVT, SubConcatOps);
2441 ConcatEnd = SubConcatIdx + 1;
2445 // Check to see if we have a single operation with the widen type.
2446 if (ConcatEnd == 1) {
2447 VT = ConcatOps[0].getValueType();
2449 return ConcatOps[0];
2452 // add undefs of size MaxVT until ConcatOps grows to length of WidenVT
2453 unsigned NumOps = WidenVT.getVectorNumElements()/MaxVT.getVectorNumElements();
2454 if (NumOps != ConcatEnd ) {
2455 SDValue UndefVal = DAG.getUNDEF(MaxVT);
2456 for (unsigned j = ConcatEnd; j < NumOps; ++j)
2457 ConcatOps[j] = UndefVal;
2459 return DAG.getNode(ISD::CONCAT_VECTORS, dl, WidenVT,
2460 makeArrayRef(ConcatOps.data(), NumOps));
2463 SDValue DAGTypeLegalizer::WidenVecRes_Convert(SDNode *N) {
2464 SDValue InOp = N->getOperand(0);
2467 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2468 unsigned WidenNumElts = WidenVT.getVectorNumElements();
2470 EVT InVT = InOp.getValueType();
2471 EVT InEltVT = InVT.getVectorElementType();
2472 EVT InWidenVT = EVT::getVectorVT(*DAG.getContext(), InEltVT, WidenNumElts);
2474 unsigned Opcode = N->getOpcode();
2475 unsigned InVTNumElts = InVT.getVectorNumElements();
2476 const SDNodeFlags Flags = N->getFlags();
2477 if (getTypeAction(InVT) == TargetLowering::TypeWidenVector) {
2478 InOp = GetWidenedVector(N->getOperand(0));
2479 InVT = InOp.getValueType();
2480 InVTNumElts = InVT.getVectorNumElements();
2481 if (InVTNumElts == WidenNumElts) {
2482 if (N->getNumOperands() == 1)
2483 return DAG.getNode(Opcode, DL, WidenVT, InOp);
2484 return DAG.getNode(Opcode, DL, WidenVT, InOp, N->getOperand(1), Flags);
2486 if (WidenVT.getSizeInBits() == InVT.getSizeInBits()) {
2487 // If both input and result vector types are of same width, extend
2488 // operations should be done with SIGN/ZERO_EXTEND_VECTOR_INREG, which
2489 // accepts fewer elements in the result than in the input.
2490 if (Opcode == ISD::SIGN_EXTEND)
2491 return DAG.getSignExtendVectorInReg(InOp, DL, WidenVT);
2492 if (Opcode == ISD::ZERO_EXTEND)
2493 return DAG.getZeroExtendVectorInReg(InOp, DL, WidenVT);
2497 if (TLI.isTypeLegal(InWidenVT)) {
2498 // Because the result and the input are different vector types, widening
2499 // the result could create a legal type but widening the input might make
2500 // it an illegal type that might lead to repeatedly splitting the input
2501 // and then widening it. To avoid this, we widen the input only if
2502 // it results in a legal type.
2503 if (WidenNumElts % InVTNumElts == 0) {
2504 // Widen the input and call convert on the widened input vector.
2505 unsigned NumConcat = WidenNumElts/InVTNumElts;
2506 SmallVector<SDValue, 16> Ops(NumConcat);
2508 SDValue UndefVal = DAG.getUNDEF(InVT);
2509 for (unsigned i = 1; i != NumConcat; ++i)
2511 SDValue InVec = DAG.getNode(ISD::CONCAT_VECTORS, DL, InWidenVT, Ops);
2512 if (N->getNumOperands() == 1)
2513 return DAG.getNode(Opcode, DL, WidenVT, InVec);
2514 return DAG.getNode(Opcode, DL, WidenVT, InVec, N->getOperand(1), Flags);
2517 if (InVTNumElts % WidenNumElts == 0) {
2518 SDValue InVal = DAG.getNode(
2519 ISD::EXTRACT_SUBVECTOR, DL, InWidenVT, InOp,
2520 DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout())));
2521 // Extract the input and convert the shorten input vector.
2522 if (N->getNumOperands() == 1)
2523 return DAG.getNode(Opcode, DL, WidenVT, InVal);
2524 return DAG.getNode(Opcode, DL, WidenVT, InVal, N->getOperand(1), Flags);
2528 // Otherwise unroll into some nasty scalar code and rebuild the vector.
2529 SmallVector<SDValue, 16> Ops(WidenNumElts);
2530 EVT EltVT = WidenVT.getVectorElementType();
2531 unsigned MinElts = std::min(InVTNumElts, WidenNumElts);
2533 for (i=0; i < MinElts; ++i) {
2534 SDValue Val = DAG.getNode(
2535 ISD::EXTRACT_VECTOR_ELT, DL, InEltVT, InOp,
2536 DAG.getConstant(i, DL, TLI.getVectorIdxTy(DAG.getDataLayout())));
2537 if (N->getNumOperands() == 1)
2538 Ops[i] = DAG.getNode(Opcode, DL, EltVT, Val);
2540 Ops[i] = DAG.getNode(Opcode, DL, EltVT, Val, N->getOperand(1), Flags);
2543 SDValue UndefVal = DAG.getUNDEF(EltVT);
2544 for (; i < WidenNumElts; ++i)
2547 return DAG.getBuildVector(WidenVT, DL, Ops);
2550 SDValue DAGTypeLegalizer::WidenVecRes_EXTEND_VECTOR_INREG(SDNode *N) {
2551 unsigned Opcode = N->getOpcode();
2552 SDValue InOp = N->getOperand(0);
2555 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2556 EVT WidenSVT = WidenVT.getVectorElementType();
2557 unsigned WidenNumElts = WidenVT.getVectorNumElements();
2559 EVT InVT = InOp.getValueType();
2560 EVT InSVT = InVT.getVectorElementType();
2561 unsigned InVTNumElts = InVT.getVectorNumElements();
2563 if (getTypeAction(InVT) == TargetLowering::TypeWidenVector) {
2564 InOp = GetWidenedVector(InOp);
2565 InVT = InOp.getValueType();
2566 if (InVT.getSizeInBits() == WidenVT.getSizeInBits()) {
2568 case ISD::ANY_EXTEND_VECTOR_INREG:
2569 return DAG.getAnyExtendVectorInReg(InOp, DL, WidenVT);
2570 case ISD::SIGN_EXTEND_VECTOR_INREG:
2571 return DAG.getSignExtendVectorInReg(InOp, DL, WidenVT);
2572 case ISD::ZERO_EXTEND_VECTOR_INREG:
2573 return DAG.getZeroExtendVectorInReg(InOp, DL, WidenVT);
2578 // Unroll, extend the scalars and rebuild the vector.
2579 SmallVector<SDValue, 16> Ops;
2580 for (unsigned i = 0, e = std::min(InVTNumElts, WidenNumElts); i != e; ++i) {
2581 SDValue Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, InSVT, InOp,
2582 DAG.getConstant(i, DL, TLI.getVectorIdxTy(DAG.getDataLayout())));
2584 case ISD::ANY_EXTEND_VECTOR_INREG:
2585 Val = DAG.getNode(ISD::ANY_EXTEND, DL, WidenSVT, Val);
2587 case ISD::SIGN_EXTEND_VECTOR_INREG:
2588 Val = DAG.getNode(ISD::SIGN_EXTEND, DL, WidenSVT, Val);
2590 case ISD::ZERO_EXTEND_VECTOR_INREG:
2591 Val = DAG.getNode(ISD::ZERO_EXTEND, DL, WidenSVT, Val);
2594 llvm_unreachable("A *_EXTEND_VECTOR_INREG node was expected");
2599 while (Ops.size() != WidenNumElts)
2600 Ops.push_back(DAG.getUNDEF(WidenSVT));
2602 return DAG.getBuildVector(WidenVT, DL, Ops);
2605 SDValue DAGTypeLegalizer::WidenVecRes_FCOPYSIGN(SDNode *N) {
2606 // If this is an FCOPYSIGN with same input types, we can treat it as a
2607 // normal (can trap) binary op.
2608 if (N->getOperand(0).getValueType() == N->getOperand(1).getValueType())
2609 return WidenVecRes_BinaryCanTrap(N);
2611 // If the types are different, fall back to unrolling.
2612 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2613 return DAG.UnrollVectorOp(N, WidenVT.getVectorNumElements());
2616 SDValue DAGTypeLegalizer::WidenVecRes_POWI(SDNode *N) {
2617 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2618 SDValue InOp = GetWidenedVector(N->getOperand(0));
2619 SDValue ShOp = N->getOperand(1);
2620 return DAG.getNode(N->getOpcode(), SDLoc(N), WidenVT, InOp, ShOp);
2623 SDValue DAGTypeLegalizer::WidenVecRes_Shift(SDNode *N) {
2624 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2625 SDValue InOp = GetWidenedVector(N->getOperand(0));
2626 SDValue ShOp = N->getOperand(1);
2628 EVT ShVT = ShOp.getValueType();
2629 if (getTypeAction(ShVT) == TargetLowering::TypeWidenVector) {
2630 ShOp = GetWidenedVector(ShOp);
2631 ShVT = ShOp.getValueType();
2633 EVT ShWidenVT = EVT::getVectorVT(*DAG.getContext(),
2634 ShVT.getVectorElementType(),
2635 WidenVT.getVectorNumElements());
2636 if (ShVT != ShWidenVT)
2637 ShOp = ModifyToType(ShOp, ShWidenVT);
2639 return DAG.getNode(N->getOpcode(), SDLoc(N), WidenVT, InOp, ShOp);
2642 SDValue DAGTypeLegalizer::WidenVecRes_Unary(SDNode *N) {
2643 // Unary op widening.
2644 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2645 SDValue InOp = GetWidenedVector(N->getOperand(0));
2646 return DAG.getNode(N->getOpcode(), SDLoc(N), WidenVT, InOp);
2649 SDValue DAGTypeLegalizer::WidenVecRes_InregOp(SDNode *N) {
2650 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2651 EVT ExtVT = EVT::getVectorVT(*DAG.getContext(),
2652 cast<VTSDNode>(N->getOperand(1))->getVT()
2653 .getVectorElementType(),
2654 WidenVT.getVectorNumElements());
2655 SDValue WidenLHS = GetWidenedVector(N->getOperand(0));
2656 return DAG.getNode(N->getOpcode(), SDLoc(N),
2657 WidenVT, WidenLHS, DAG.getValueType(ExtVT));
2660 SDValue DAGTypeLegalizer::WidenVecRes_MERGE_VALUES(SDNode *N, unsigned ResNo) {
2661 SDValue WidenVec = DisintegrateMERGE_VALUES(N, ResNo);
2662 return GetWidenedVector(WidenVec);
2665 SDValue DAGTypeLegalizer::WidenVecRes_BITCAST(SDNode *N) {
2666 SDValue InOp = N->getOperand(0);
2667 EVT InVT = InOp.getValueType();
2668 EVT VT = N->getValueType(0);
2669 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2672 switch (getTypeAction(InVT)) {
2673 case TargetLowering::TypeLegal:
2675 case TargetLowering::TypePromoteInteger:
2676 // If the incoming type is a vector that is being promoted, then
2677 // we know that the elements are arranged differently and that we
2678 // must perform the conversion using a stack slot.
2679 if (InVT.isVector())
2682 // If the InOp is promoted to the same size, convert it. Otherwise,
2683 // fall out of the switch and widen the promoted input.
2684 InOp = GetPromotedInteger(InOp);
2685 InVT = InOp.getValueType();
2686 if (WidenVT.bitsEq(InVT))
2687 return DAG.getNode(ISD::BITCAST, dl, WidenVT, InOp);
2689 case TargetLowering::TypeSoftenFloat:
2690 case TargetLowering::TypePromoteFloat:
2691 case TargetLowering::TypeExpandInteger:
2692 case TargetLowering::TypeExpandFloat:
2693 case TargetLowering::TypeScalarizeVector:
2694 case TargetLowering::TypeSplitVector:
2696 case TargetLowering::TypeWidenVector:
2697 // If the InOp is widened to the same size, convert it. Otherwise, fall
2698 // out of the switch and widen the widened input.
2699 InOp = GetWidenedVector(InOp);
2700 InVT = InOp.getValueType();
2701 if (WidenVT.bitsEq(InVT))
2702 // The input widens to the same size. Convert to the widen value.
2703 return DAG.getNode(ISD::BITCAST, dl, WidenVT, InOp);
2707 unsigned WidenSize = WidenVT.getSizeInBits();
2708 unsigned InSize = InVT.getSizeInBits();
2709 // x86mmx is not an acceptable vector element type, so don't try.
2710 if (WidenSize % InSize == 0 && InVT != MVT::x86mmx) {
2711 // Determine new input vector type. The new input vector type will use
2712 // the same element type (if its a vector) or use the input type as a
2713 // vector. It is the same size as the type to widen to.
2715 unsigned NewNumElts = WidenSize / InSize;
2716 if (InVT.isVector()) {
2717 EVT InEltVT = InVT.getVectorElementType();
2718 NewInVT = EVT::getVectorVT(*DAG.getContext(), InEltVT,
2719 WidenSize / InEltVT.getSizeInBits());
2721 NewInVT = EVT::getVectorVT(*DAG.getContext(), InVT, NewNumElts);
2724 if (TLI.isTypeLegal(NewInVT)) {
2725 // Because the result and the input are different vector types, widening
2726 // the result could create a legal type but widening the input might make
2727 // it an illegal type that might lead to repeatedly splitting the input
2728 // and then widening it. To avoid this, we widen the input only if
2729 // it results in a legal type.
2730 SmallVector<SDValue, 16> Ops(NewNumElts);
2731 SDValue UndefVal = DAG.getUNDEF(InVT);
2733 for (unsigned i = 1; i < NewNumElts; ++i)
2737 if (InVT.isVector())
2738 NewVec = DAG.getNode(ISD::CONCAT_VECTORS, dl, NewInVT, Ops);
2740 NewVec = DAG.getBuildVector(NewInVT, dl, Ops);
2741 return DAG.getNode(ISD::BITCAST, dl, WidenVT, NewVec);
2745 return CreateStackStoreLoad(InOp, WidenVT);
2748 SDValue DAGTypeLegalizer::WidenVecRes_BUILD_VECTOR(SDNode *N) {
2750 // Build a vector with undefined for the new nodes.
2751 EVT VT = N->getValueType(0);
2753 // Integer BUILD_VECTOR operands may be larger than the node's vector element
2754 // type. The UNDEFs need to have the same type as the existing operands.
2755 EVT EltVT = N->getOperand(0).getValueType();
2756 unsigned NumElts = VT.getVectorNumElements();
2758 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2759 unsigned WidenNumElts = WidenVT.getVectorNumElements();
2761 SmallVector<SDValue, 16> NewOps(N->op_begin(), N->op_end());
2762 assert(WidenNumElts >= NumElts && "Shrinking vector instead of widening!");
2763 NewOps.append(WidenNumElts - NumElts, DAG.getUNDEF(EltVT));
2765 return DAG.getBuildVector(WidenVT, dl, NewOps);
2768 SDValue DAGTypeLegalizer::WidenVecRes_CONCAT_VECTORS(SDNode *N) {
2769 EVT InVT = N->getOperand(0).getValueType();
2770 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2772 unsigned WidenNumElts = WidenVT.getVectorNumElements();
2773 unsigned NumInElts = InVT.getVectorNumElements();
2774 unsigned NumOperands = N->getNumOperands();
2776 bool InputWidened = false; // Indicates we need to widen the input.
2777 if (getTypeAction(InVT) != TargetLowering::TypeWidenVector) {
2778 if (WidenVT.getVectorNumElements() % InVT.getVectorNumElements() == 0) {
2779 // Add undef vectors to widen to correct length.
2780 unsigned NumConcat = WidenVT.getVectorNumElements() /
2781 InVT.getVectorNumElements();
2782 SDValue UndefVal = DAG.getUNDEF(InVT);
2783 SmallVector<SDValue, 16> Ops(NumConcat);
2784 for (unsigned i=0; i < NumOperands; ++i)
2785 Ops[i] = N->getOperand(i);
2786 for (unsigned i = NumOperands; i != NumConcat; ++i)
2788 return DAG.getNode(ISD::CONCAT_VECTORS, dl, WidenVT, Ops);
2791 InputWidened = true;
2792 if (WidenVT == TLI.getTypeToTransformTo(*DAG.getContext(), InVT)) {
2793 // The inputs and the result are widen to the same value.
2795 for (i=1; i < NumOperands; ++i)
2796 if (!N->getOperand(i).isUndef())
2799 if (i == NumOperands)
2800 // Everything but the first operand is an UNDEF so just return the
2801 // widened first operand.
2802 return GetWidenedVector(N->getOperand(0));
2804 if (NumOperands == 2) {
2805 // Replace concat of two operands with a shuffle.
2806 SmallVector<int, 16> MaskOps(WidenNumElts, -1);
2807 for (unsigned i = 0; i < NumInElts; ++i) {
2809 MaskOps[i + NumInElts] = i + WidenNumElts;
2811 return DAG.getVectorShuffle(WidenVT, dl,
2812 GetWidenedVector(N->getOperand(0)),
2813 GetWidenedVector(N->getOperand(1)),
2819 // Fall back to use extracts and build vector.
2820 EVT EltVT = WidenVT.getVectorElementType();
2821 SmallVector<SDValue, 16> Ops(WidenNumElts);
2823 for (unsigned i=0; i < NumOperands; ++i) {
2824 SDValue InOp = N->getOperand(i);
2826 InOp = GetWidenedVector(InOp);
2827 for (unsigned j=0; j < NumInElts; ++j)
2828 Ops[Idx++] = DAG.getNode(
2829 ISD::EXTRACT_VECTOR_ELT, dl, EltVT, InOp,
2830 DAG.getConstant(j, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
2832 SDValue UndefVal = DAG.getUNDEF(EltVT);
2833 for (; Idx < WidenNumElts; ++Idx)
2834 Ops[Idx] = UndefVal;
2835 return DAG.getBuildVector(WidenVT, dl, Ops);
2838 SDValue DAGTypeLegalizer::WidenVecRes_EXTRACT_SUBVECTOR(SDNode *N) {
2839 EVT VT = N->getValueType(0);
2840 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2841 unsigned WidenNumElts = WidenVT.getVectorNumElements();
2842 SDValue InOp = N->getOperand(0);
2843 SDValue Idx = N->getOperand(1);
2846 if (getTypeAction(InOp.getValueType()) == TargetLowering::TypeWidenVector)
2847 InOp = GetWidenedVector(InOp);
2849 EVT InVT = InOp.getValueType();
2851 // Check if we can just return the input vector after widening.
2852 uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
2853 if (IdxVal == 0 && InVT == WidenVT)
2856 // Check if we can extract from the vector.
2857 unsigned InNumElts = InVT.getVectorNumElements();
2858 if (IdxVal % WidenNumElts == 0 && IdxVal + WidenNumElts < InNumElts)
2859 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, WidenVT, InOp, Idx);
2861 // We could try widening the input to the right length but for now, extract
2862 // the original elements, fill the rest with undefs and build a vector.
2863 SmallVector<SDValue, 16> Ops(WidenNumElts);
2864 EVT EltVT = VT.getVectorElementType();
2865 unsigned NumElts = VT.getVectorNumElements();
2867 for (i=0; i < NumElts; ++i)
2869 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, InOp,
2870 DAG.getConstant(IdxVal + i, dl,
2871 TLI.getVectorIdxTy(DAG.getDataLayout())));
2873 SDValue UndefVal = DAG.getUNDEF(EltVT);
2874 for (; i < WidenNumElts; ++i)
2876 return DAG.getBuildVector(WidenVT, dl, Ops);
2879 SDValue DAGTypeLegalizer::WidenVecRes_INSERT_VECTOR_ELT(SDNode *N) {
2880 SDValue InOp = GetWidenedVector(N->getOperand(0));
2881 return DAG.getNode(ISD::INSERT_VECTOR_ELT, SDLoc(N),
2882 InOp.getValueType(), InOp,
2883 N->getOperand(1), N->getOperand(2));
2886 SDValue DAGTypeLegalizer::WidenVecRes_LOAD(SDNode *N) {
2887 LoadSDNode *LD = cast<LoadSDNode>(N);
2888 ISD::LoadExtType ExtType = LD->getExtensionType();
2891 SmallVector<SDValue, 16> LdChain; // Chain for the series of load
2892 if (ExtType != ISD::NON_EXTLOAD)
2893 Result = GenWidenVectorExtLoads(LdChain, LD, ExtType);
2895 Result = GenWidenVectorLoads(LdChain, LD);
2897 // If we generate a single load, we can use that for the chain. Otherwise,
2898 // build a factor node to remember the multiple loads are independent and
2901 if (LdChain.size() == 1)
2902 NewChain = LdChain[0];
2904 NewChain = DAG.getNode(ISD::TokenFactor, SDLoc(LD), MVT::Other, LdChain);
2906 // Modified the chain - switch anything that used the old chain to use
2908 ReplaceValueWith(SDValue(N, 1), NewChain);
2913 SDValue DAGTypeLegalizer::WidenVecRes_MLOAD(MaskedLoadSDNode *N) {
2915 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(),N->getValueType(0));
2916 SDValue Mask = N->getMask();
2917 EVT MaskVT = Mask.getValueType();
2918 SDValue Src0 = GetWidenedVector(N->getSrc0());
2919 ISD::LoadExtType ExtType = N->getExtensionType();
2922 if (getTypeAction(MaskVT) == TargetLowering::TypeWidenVector)
2923 Mask = GetWidenedVector(Mask);
2925 EVT BoolVT = getSetCCResultType(WidenVT);
2927 // We can't use ModifyToType() because we should fill the mask with
2929 unsigned WidenNumElts = BoolVT.getVectorNumElements();
2930 unsigned MaskNumElts = MaskVT.getVectorNumElements();
2932 unsigned NumConcat = WidenNumElts / MaskNumElts;
2933 SmallVector<SDValue, 16> Ops(NumConcat);
2934 SDValue ZeroVal = DAG.getConstant(0, dl, MaskVT);
2936 for (unsigned i = 1; i != NumConcat; ++i)
2939 Mask = DAG.getNode(ISD::CONCAT_VECTORS, dl, BoolVT, Ops);
2942 SDValue Res = DAG.getMaskedLoad(WidenVT, dl, N->getChain(), N->getBasePtr(),
2943 Mask, Src0, N->getMemoryVT(),
2944 N->getMemOperand(), ExtType,
2945 N->isExpandingLoad());
2946 // Legalize the chain result - switch anything that used the old chain to
2948 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
2952 SDValue DAGTypeLegalizer::WidenVecRes_MGATHER(MaskedGatherSDNode *N) {
2954 EVT WideVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2955 SDValue Mask = N->getMask();
2956 SDValue Src0 = GetWidenedVector(N->getValue());
2957 unsigned NumElts = WideVT.getVectorNumElements();
2960 // The mask should be widened as well
2961 Mask = WidenTargetBoolean(Mask, WideVT, true);
2963 // Widen the Index operand
2964 SDValue Index = N->getIndex();
2965 EVT WideIndexVT = EVT::getVectorVT(*DAG.getContext(),
2966 Index.getValueType().getScalarType(),
2968 Index = ModifyToType(Index, WideIndexVT);
2969 SDValue Ops[] = { N->getChain(), Src0, Mask, N->getBasePtr(), Index };
2970 SDValue Res = DAG.getMaskedGather(DAG.getVTList(WideVT, MVT::Other),
2971 N->getMemoryVT(), dl, Ops,
2972 N->getMemOperand());
2974 // Legalize the chain result - switch anything that used the old chain to
2976 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
2980 SDValue DAGTypeLegalizer::WidenVecRes_SCALAR_TO_VECTOR(SDNode *N) {
2981 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2982 return DAG.getNode(ISD::SCALAR_TO_VECTOR, SDLoc(N),
2983 WidenVT, N->getOperand(0));
2986 // Return true if this is a node that could have two SETCCs as operands.
2987 static inline bool isLogicalMaskOp(unsigned Opcode) {
2997 // This is used just for the assert in convertMask(). Check that this either
2998 // a SETCC or a previously handled SETCC by convertMask().
3000 static inline bool isSETCCorConvertedSETCC(SDValue N) {
3001 if (N.getOpcode() == ISD::EXTRACT_SUBVECTOR)
3002 N = N.getOperand(0);
3003 else if (N.getOpcode() == ISD::CONCAT_VECTORS) {
3004 for (unsigned i = 1; i < N->getNumOperands(); ++i)
3005 if (!N->getOperand(i)->isUndef())
3007 N = N.getOperand(0);
3010 if (N.getOpcode() == ISD::TRUNCATE)
3011 N = N.getOperand(0);
3012 else if (N.getOpcode() == ISD::SIGN_EXTEND)
3013 N = N.getOperand(0);
3015 if (isLogicalMaskOp(N.getOpcode()))
3016 return isSETCCorConvertedSETCC(N.getOperand(0)) &&
3017 isSETCCorConvertedSETCC(N.getOperand(1));
3019 return (N.getOpcode() == ISD::SETCC ||
3020 ISD::isBuildVectorOfConstantSDNodes(N.getNode()));
3024 // Return a mask of vector type MaskVT to replace InMask. Also adjust MaskVT
3025 // to ToMaskVT if needed with vector extension or truncation.
3026 SDValue DAGTypeLegalizer::convertMask(SDValue InMask, EVT MaskVT,
3028 // Currently a SETCC or a AND/OR/XOR with two SETCCs are handled.
3029 // FIXME: This code seems to be too restrictive, we might consider
3030 // generalizing it or dropping it.
3031 assert(isSETCCorConvertedSETCC(InMask) && "Unexpected mask argument.");
3033 // Make a new Mask node, with a legal result VT.
3034 SmallVector<SDValue, 4> Ops;
3035 for (unsigned i = 0; i < InMask->getNumOperands(); ++i)
3036 Ops.push_back(InMask->getOperand(i));
3037 SDValue Mask = DAG.getNode(InMask->getOpcode(), SDLoc(InMask), MaskVT, Ops);
3039 // If MaskVT has smaller or bigger elements than ToMaskVT, a vector sign
3040 // extend or truncate is needed.
3041 LLVMContext &Ctx = *DAG.getContext();
3042 unsigned MaskScalarBits = MaskVT.getScalarSizeInBits();
3043 unsigned ToMaskScalBits = ToMaskVT.getScalarSizeInBits();
3044 if (MaskScalarBits < ToMaskScalBits) {
3045 EVT ExtVT = EVT::getVectorVT(Ctx, ToMaskVT.getVectorElementType(),
3046 MaskVT.getVectorNumElements());
3047 Mask = DAG.getNode(ISD::SIGN_EXTEND, SDLoc(Mask), ExtVT, Mask);
3048 } else if (MaskScalarBits > ToMaskScalBits) {
3049 EVT TruncVT = EVT::getVectorVT(Ctx, ToMaskVT.getVectorElementType(),
3050 MaskVT.getVectorNumElements());
3051 Mask = DAG.getNode(ISD::TRUNCATE, SDLoc(Mask), TruncVT, Mask);
3054 assert(Mask->getValueType(0).getScalarSizeInBits() ==
3055 ToMaskVT.getScalarSizeInBits() &&
3056 "Mask should have the right element size by now.");
3058 // Adjust Mask to the right number of elements.
3059 unsigned CurrMaskNumEls = Mask->getValueType(0).getVectorNumElements();
3060 if (CurrMaskNumEls > ToMaskVT.getVectorNumElements()) {
3061 MVT IdxTy = TLI.getVectorIdxTy(DAG.getDataLayout());
3062 SDValue ZeroIdx = DAG.getConstant(0, SDLoc(Mask), IdxTy);
3063 Mask = DAG.getNode(ISD::EXTRACT_SUBVECTOR, SDLoc(Mask), ToMaskVT, Mask,
3065 } else if (CurrMaskNumEls < ToMaskVT.getVectorNumElements()) {
3066 unsigned NumSubVecs = (ToMaskVT.getVectorNumElements() / CurrMaskNumEls);
3067 EVT SubVT = Mask->getValueType(0);
3068 SmallVector<SDValue, 16> SubConcatOps(NumSubVecs);
3069 SubConcatOps[0] = Mask;
3070 for (unsigned i = 1; i < NumSubVecs; ++i)
3071 SubConcatOps[i] = DAG.getUNDEF(SubVT);
3073 DAG.getNode(ISD::CONCAT_VECTORS, SDLoc(Mask), ToMaskVT, SubConcatOps);
3076 assert((Mask->getValueType(0) == ToMaskVT) &&
3077 "A mask of ToMaskVT should have been produced by now.");
3082 // Get the target mask VT, and widen if needed.
3083 EVT DAGTypeLegalizer::getSETCCWidenedResultTy(SDValue SetCC) {
3084 assert(SetCC->getOpcode() == ISD::SETCC);
3085 LLVMContext &Ctx = *DAG.getContext();
3086 EVT MaskVT = getSetCCResultType(SetCC->getOperand(0).getValueType());
3087 if (getTypeAction(MaskVT) == TargetLowering::TypeWidenVector)
3088 MaskVT = TLI.getTypeToTransformTo(Ctx, MaskVT);
3092 // This method tries to handle VSELECT and its mask by legalizing operands
3093 // (which may require widening) and if needed adjusting the mask vector type
3094 // to match that of the VSELECT. Without it, many cases end up with
3095 // scalarization of the SETCC, with many unnecessary instructions.
3096 SDValue DAGTypeLegalizer::WidenVSELECTAndMask(SDNode *N) {
3097 LLVMContext &Ctx = *DAG.getContext();
3098 SDValue Cond = N->getOperand(0);
3100 if (N->getOpcode() != ISD::VSELECT)
3103 if (Cond->getOpcode() != ISD::SETCC && !isLogicalMaskOp(Cond->getOpcode()))
3106 // If this is a splitted VSELECT that was previously already handled, do
3108 if (Cond->getValueType(0).getScalarSizeInBits() != 1)
3111 EVT VSelVT = N->getValueType(0);
3112 // Only handle vector types which are a power of 2.
3113 if (!isPowerOf2_64(VSelVT.getSizeInBits()))
3116 // Don't touch if this will be scalarized.
3117 EVT FinalVT = VSelVT;
3118 while (getTypeAction(FinalVT) == TargetLowering::TypeSplitVector)
3119 FinalVT = FinalVT.getHalfNumVectorElementsVT(Ctx);
3121 if (FinalVT.getVectorNumElements() == 1)
3124 // If there is support for an i1 vector mask, don't touch.
3125 if (Cond.getOpcode() == ISD::SETCC) {
3126 EVT SetCCOpVT = Cond->getOperand(0).getValueType();
3127 while (TLI.getTypeAction(Ctx, SetCCOpVT) != TargetLowering::TypeLegal)
3128 SetCCOpVT = TLI.getTypeToTransformTo(Ctx, SetCCOpVT);
3129 EVT SetCCResVT = getSetCCResultType(SetCCOpVT);
3130 if (SetCCResVT.getScalarSizeInBits() == 1)
3134 // Get the VT and operands for VSELECT, and widen if needed.
3135 SDValue VSelOp1 = N->getOperand(1);
3136 SDValue VSelOp2 = N->getOperand(2);
3137 if (getTypeAction(VSelVT) == TargetLowering::TypeWidenVector) {
3138 VSelVT = TLI.getTypeToTransformTo(Ctx, VSelVT);
3139 VSelOp1 = GetWidenedVector(VSelOp1);
3140 VSelOp2 = GetWidenedVector(VSelOp2);
3143 // The mask of the VSELECT should have integer elements.
3144 EVT ToMaskVT = VSelVT;
3145 if (!ToMaskVT.getScalarType().isInteger())
3146 ToMaskVT = ToMaskVT.changeVectorElementTypeToInteger();
3149 if (Cond->getOpcode() == ISD::SETCC) {
3150 EVT MaskVT = getSETCCWidenedResultTy(Cond);
3151 Mask = convertMask(Cond, MaskVT, ToMaskVT);
3152 } else if (isLogicalMaskOp(Cond->getOpcode()) &&
3153 Cond->getOperand(0).getOpcode() == ISD::SETCC &&
3154 Cond->getOperand(1).getOpcode() == ISD::SETCC) {
3155 // Cond is (AND/OR/XOR (SETCC, SETCC))
3156 SDValue SETCC0 = Cond->getOperand(0);
3157 SDValue SETCC1 = Cond->getOperand(1);
3158 EVT VT0 = getSETCCWidenedResultTy(SETCC0);
3159 EVT VT1 = getSETCCWidenedResultTy(SETCC1);
3160 unsigned ScalarBits0 = VT0.getScalarSizeInBits();
3161 unsigned ScalarBits1 = VT1.getScalarSizeInBits();
3162 unsigned ScalarBits_ToMask = ToMaskVT.getScalarSizeInBits();
3164 // If the two SETCCs have different VTs, either extend/truncate one of
3165 // them to the other "towards" ToMaskVT, or truncate one and extend the
3166 // other to ToMaskVT.
3167 if (ScalarBits0 != ScalarBits1) {
3168 EVT NarrowVT = ((ScalarBits0 < ScalarBits1) ? VT0 : VT1);
3169 EVT WideVT = ((NarrowVT == VT0) ? VT1 : VT0);
3170 if (ScalarBits_ToMask >= WideVT.getScalarSizeInBits())
3172 else if (ScalarBits_ToMask <= NarrowVT.getScalarSizeInBits())
3177 // If the two SETCCs have the same VT, don't change it.
3180 // Make new SETCCs and logical nodes.
3181 SETCC0 = convertMask(SETCC0, VT0, MaskVT);
3182 SETCC1 = convertMask(SETCC1, VT1, MaskVT);
3183 Cond = DAG.getNode(Cond->getOpcode(), SDLoc(Cond), MaskVT, SETCC0, SETCC1);
3185 // Convert the logical op for VSELECT if needed.
3186 Mask = convertMask(Cond, MaskVT, ToMaskVT);
3190 return DAG.getNode(ISD::VSELECT, SDLoc(N), VSelVT, Mask, VSelOp1, VSelOp2);
3193 SDValue DAGTypeLegalizer::WidenVecRes_SELECT(SDNode *N) {
3194 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
3195 unsigned WidenNumElts = WidenVT.getVectorNumElements();
3197 SDValue Cond1 = N->getOperand(0);
3198 EVT CondVT = Cond1.getValueType();
3199 if (CondVT.isVector()) {
3200 if (SDValue Res = WidenVSELECTAndMask(N))
3203 EVT CondEltVT = CondVT.getVectorElementType();
3204 EVT CondWidenVT = EVT::getVectorVT(*DAG.getContext(),
3205 CondEltVT, WidenNumElts);
3206 if (getTypeAction(CondVT) == TargetLowering::TypeWidenVector)
3207 Cond1 = GetWidenedVector(Cond1);
3209 // If we have to split the condition there is no point in widening the
3210 // select. This would result in an cycle of widening the select ->
3211 // widening the condition operand -> splitting the condition operand ->
3212 // splitting the select -> widening the select. Instead split this select
3213 // further and widen the resulting type.
3214 if (getTypeAction(CondVT) == TargetLowering::TypeSplitVector) {
3215 SDValue SplitSelect = SplitVecOp_VSELECT(N, 0);
3216 SDValue Res = ModifyToType(SplitSelect, WidenVT);
3220 if (Cond1.getValueType() != CondWidenVT)
3221 Cond1 = ModifyToType(Cond1, CondWidenVT);
3224 SDValue InOp1 = GetWidenedVector(N->getOperand(1));
3225 SDValue InOp2 = GetWidenedVector(N->getOperand(2));
3226 assert(InOp1.getValueType() == WidenVT && InOp2.getValueType() == WidenVT);
3227 return DAG.getNode(N->getOpcode(), SDLoc(N),
3228 WidenVT, Cond1, InOp1, InOp2);
3231 SDValue DAGTypeLegalizer::WidenVecRes_SELECT_CC(SDNode *N) {
3232 SDValue InOp1 = GetWidenedVector(N->getOperand(2));
3233 SDValue InOp2 = GetWidenedVector(N->getOperand(3));
3234 return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
3235 InOp1.getValueType(), N->getOperand(0),
3236 N->getOperand(1), InOp1, InOp2, N->getOperand(4));
3239 SDValue DAGTypeLegalizer::WidenVecRes_SETCC(SDNode *N) {
3240 assert(N->getValueType(0).isVector() ==
3241 N->getOperand(0).getValueType().isVector() &&
3242 "Scalar/Vector type mismatch");
3243 if (N->getValueType(0).isVector()) return WidenVecRes_VSETCC(N);
3245 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
3246 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
3247 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
3248 return DAG.getNode(ISD::SETCC, SDLoc(N), WidenVT,
3249 InOp1, InOp2, N->getOperand(2));
3252 SDValue DAGTypeLegalizer::WidenVecRes_UNDEF(SDNode *N) {
3253 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
3254 return DAG.getUNDEF(WidenVT);
3257 SDValue DAGTypeLegalizer::WidenVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N) {
3258 EVT VT = N->getValueType(0);
3261 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
3262 unsigned NumElts = VT.getVectorNumElements();
3263 unsigned WidenNumElts = WidenVT.getVectorNumElements();
3265 SDValue InOp1 = GetWidenedVector(N->getOperand(0));
3266 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
3268 // Adjust mask based on new input vector length.
3269 SmallVector<int, 16> NewMask;
3270 for (unsigned i = 0; i != NumElts; ++i) {
3271 int Idx = N->getMaskElt(i);
3272 if (Idx < (int)NumElts)
3273 NewMask.push_back(Idx);
3275 NewMask.push_back(Idx - NumElts + WidenNumElts);
3277 for (unsigned i = NumElts; i != WidenNumElts; ++i)
3278 NewMask.push_back(-1);
3279 return DAG.getVectorShuffle(WidenVT, dl, InOp1, InOp2, NewMask);
3282 SDValue DAGTypeLegalizer::WidenVecRes_VSETCC(SDNode *N) {
3283 assert(N->getValueType(0).isVector() &&
3284 N->getOperand(0).getValueType().isVector() &&
3285 "Operands must be vectors");
3286 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
3287 unsigned WidenNumElts = WidenVT.getVectorNumElements();
3289 SDValue InOp1 = N->getOperand(0);
3290 EVT InVT = InOp1.getValueType();
3291 assert(InVT.isVector() && "can not widen non-vector type");
3292 EVT WidenInVT = EVT::getVectorVT(*DAG.getContext(),
3293 InVT.getVectorElementType(), WidenNumElts);
3295 // The input and output types often differ here, and it could be that while
3296 // we'd prefer to widen the result type, the input operands have been split.
3297 // In this case, we also need to split the result of this node as well.
3298 if (getTypeAction(InVT) == TargetLowering::TypeSplitVector) {
3299 SDValue SplitVSetCC = SplitVecOp_VSETCC(N);
3300 SDValue Res = ModifyToType(SplitVSetCC, WidenVT);
3304 InOp1 = GetWidenedVector(InOp1);
3305 SDValue InOp2 = GetWidenedVector(N->getOperand(1));
3307 // Assume that the input and output will be widen appropriately. If not,
3308 // we will have to unroll it at some point.
3309 assert(InOp1.getValueType() == WidenInVT &&
3310 InOp2.getValueType() == WidenInVT &&
3311 "Input not widened to expected type!");
3313 return DAG.getNode(ISD::SETCC, SDLoc(N),
3314 WidenVT, InOp1, InOp2, N->getOperand(2));
3318 //===----------------------------------------------------------------------===//
3319 // Widen Vector Operand
3320 //===----------------------------------------------------------------------===//
3321 bool DAGTypeLegalizer::WidenVectorOperand(SDNode *N, unsigned OpNo) {
3322 DEBUG(dbgs() << "Widen node operand " << OpNo << ": ";
3325 SDValue Res = SDValue();
3327 // See if the target wants to custom widen this node.
3328 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
3331 switch (N->getOpcode()) {
3334 dbgs() << "WidenVectorOperand op #" << OpNo << ": ";
3338 llvm_unreachable("Do not know how to widen this operator's operand!");
3340 case ISD::BITCAST: Res = WidenVecOp_BITCAST(N); break;
3341 case ISD::CONCAT_VECTORS: Res = WidenVecOp_CONCAT_VECTORS(N); break;
3342 case ISD::EXTRACT_SUBVECTOR: Res = WidenVecOp_EXTRACT_SUBVECTOR(N); break;
3343 case ISD::EXTRACT_VECTOR_ELT: Res = WidenVecOp_EXTRACT_VECTOR_ELT(N); break;
3344 case ISD::STORE: Res = WidenVecOp_STORE(N); break;
3345 case ISD::MSTORE: Res = WidenVecOp_MSTORE(N, OpNo); break;
3346 case ISD::MSCATTER: Res = WidenVecOp_MSCATTER(N, OpNo); break;
3347 case ISD::SETCC: Res = WidenVecOp_SETCC(N); break;
3348 case ISD::FCOPYSIGN: Res = WidenVecOp_FCOPYSIGN(N); break;
3350 case ISD::ANY_EXTEND:
3351 case ISD::SIGN_EXTEND:
3352 case ISD::ZERO_EXTEND:
3353 Res = WidenVecOp_EXTEND(N);
3356 case ISD::FP_EXTEND:
3357 case ISD::FP_TO_SINT:
3358 case ISD::FP_TO_UINT:
3359 case ISD::SINT_TO_FP:
3360 case ISD::UINT_TO_FP:
3362 Res = WidenVecOp_Convert(N);
3366 // If Res is null, the sub-method took care of registering the result.
3367 if (!Res.getNode()) return false;
3369 // If the result is N, the sub-method updated N in place. Tell the legalizer
3371 if (Res.getNode() == N)
3375 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
3376 "Invalid operand expansion");
3378 ReplaceValueWith(SDValue(N, 0), Res);
3382 SDValue DAGTypeLegalizer::WidenVecOp_EXTEND(SDNode *N) {
3384 EVT VT = N->getValueType(0);
3386 SDValue InOp = N->getOperand(0);
3387 // If some legalization strategy other than widening is used on the operand,
3388 // we can't safely assume that just extending the low lanes is the correct
3390 if (getTypeAction(InOp.getValueType()) != TargetLowering::TypeWidenVector)
3391 return WidenVecOp_Convert(N);
3392 InOp = GetWidenedVector(InOp);
3393 assert(VT.getVectorNumElements() <
3394 InOp.getValueType().getVectorNumElements() &&
3395 "Input wasn't widened!");
3397 // We may need to further widen the operand until it has the same total
3398 // vector size as the result.
3399 EVT InVT = InOp.getValueType();
3400 if (InVT.getSizeInBits() != VT.getSizeInBits()) {
3401 EVT InEltVT = InVT.getVectorElementType();
3402 for (int i = MVT::FIRST_VECTOR_VALUETYPE, e = MVT::LAST_VECTOR_VALUETYPE; i < e; ++i) {
3403 EVT FixedVT = (MVT::SimpleValueType)i;
3404 EVT FixedEltVT = FixedVT.getVectorElementType();
3405 if (TLI.isTypeLegal(FixedVT) &&
3406 FixedVT.getSizeInBits() == VT.getSizeInBits() &&
3407 FixedEltVT == InEltVT) {
3408 assert(FixedVT.getVectorNumElements() >= VT.getVectorNumElements() &&
3409 "Not enough elements in the fixed type for the operand!");
3410 assert(FixedVT.getVectorNumElements() != InVT.getVectorNumElements() &&
3411 "We can't have the same type as we started with!");
3412 if (FixedVT.getVectorNumElements() > InVT.getVectorNumElements())
3414 ISD::INSERT_SUBVECTOR, DL, FixedVT, DAG.getUNDEF(FixedVT), InOp,
3415 DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout())));
3418 ISD::EXTRACT_SUBVECTOR, DL, FixedVT, InOp,
3419 DAG.getConstant(0, DL, TLI.getVectorIdxTy(DAG.getDataLayout())));
3423 InVT = InOp.getValueType();
3424 if (InVT.getSizeInBits() != VT.getSizeInBits())
3425 // We couldn't find a legal vector type that was a widening of the input
3426 // and could be extended in-register to the result type, so we have to
3428 return WidenVecOp_Convert(N);
3431 // Use special DAG nodes to represent the operation of extending the
3433 switch (N->getOpcode()) {
3435 llvm_unreachable("Extend legalization on on extend operation!");
3436 case ISD::ANY_EXTEND:
3437 return DAG.getAnyExtendVectorInReg(InOp, DL, VT);
3438 case ISD::SIGN_EXTEND:
3439 return DAG.getSignExtendVectorInReg(InOp, DL, VT);
3440 case ISD::ZERO_EXTEND:
3441 return DAG.getZeroExtendVectorInReg(InOp, DL, VT);
3445 SDValue DAGTypeLegalizer::WidenVecOp_FCOPYSIGN(SDNode *N) {
3446 // The result (and first input) is legal, but the second input is illegal.
3447 // We can't do much to fix that, so just unroll and let the extracts off of
3448 // the second input be widened as needed later.
3449 return DAG.UnrollVectorOp(N);
3452 SDValue DAGTypeLegalizer::WidenVecOp_Convert(SDNode *N) {
3453 // Since the result is legal and the input is illegal, it is unlikely that we
3454 // can fix the input to a legal type so unroll the convert into some scalar
3455 // code and create a nasty build vector.
3456 EVT VT = N->getValueType(0);
3457 EVT EltVT = VT.getVectorElementType();
3459 unsigned NumElts = VT.getVectorNumElements();
3460 SDValue InOp = N->getOperand(0);
3461 if (getTypeAction(InOp.getValueType()) == TargetLowering::TypeWidenVector)
3462 InOp = GetWidenedVector(InOp);
3463 EVT InVT = InOp.getValueType();
3464 EVT InEltVT = InVT.getVectorElementType();
3466 unsigned Opcode = N->getOpcode();
3467 SmallVector<SDValue, 16> Ops(NumElts);
3468 for (unsigned i=0; i < NumElts; ++i)
3469 Ops[i] = DAG.getNode(
3472 ISD::EXTRACT_VECTOR_ELT, dl, InEltVT, InOp,
3473 DAG.getConstant(i, dl, TLI.getVectorIdxTy(DAG.getDataLayout()))));
3475 return DAG.getBuildVector(VT, dl, Ops);
3478 SDValue DAGTypeLegalizer::WidenVecOp_BITCAST(SDNode *N) {
3479 EVT VT = N->getValueType(0);
3480 SDValue InOp = GetWidenedVector(N->getOperand(0));
3481 EVT InWidenVT = InOp.getValueType();
3484 // Check if we can convert between two legal vector types and extract.
3485 unsigned InWidenSize = InWidenVT.getSizeInBits();
3486 unsigned Size = VT.getSizeInBits();
3487 // x86mmx is not an acceptable vector element type, so don't try.
3488 if (InWidenSize % Size == 0 && !VT.isVector() && VT != MVT::x86mmx) {
3489 unsigned NewNumElts = InWidenSize / Size;
3490 EVT NewVT = EVT::getVectorVT(*DAG.getContext(), VT, NewNumElts);
3491 if (TLI.isTypeLegal(NewVT)) {
3492 SDValue BitOp = DAG.getNode(ISD::BITCAST, dl, NewVT, InOp);
3494 ISD::EXTRACT_VECTOR_ELT, dl, VT, BitOp,
3495 DAG.getConstant(0, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
3499 return CreateStackStoreLoad(InOp, VT);
3502 SDValue DAGTypeLegalizer::WidenVecOp_CONCAT_VECTORS(SDNode *N) {
3503 // If the input vector is not legal, it is likely that we will not find a
3504 // legal vector of the same size. Replace the concatenate vector with a
3505 // nasty build vector.
3506 EVT VT = N->getValueType(0);
3507 EVT EltVT = VT.getVectorElementType();
3509 unsigned NumElts = VT.getVectorNumElements();
3510 SmallVector<SDValue, 16> Ops(NumElts);
3512 EVT InVT = N->getOperand(0).getValueType();
3513 unsigned NumInElts = InVT.getVectorNumElements();
3516 unsigned NumOperands = N->getNumOperands();
3517 for (unsigned i=0; i < NumOperands; ++i) {
3518 SDValue InOp = N->getOperand(i);
3519 if (getTypeAction(InOp.getValueType()) == TargetLowering::TypeWidenVector)
3520 InOp = GetWidenedVector(InOp);
3521 for (unsigned j=0; j < NumInElts; ++j)
3522 Ops[Idx++] = DAG.getNode(
3523 ISD::EXTRACT_VECTOR_ELT, dl, EltVT, InOp,
3524 DAG.getConstant(j, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
3526 return DAG.getBuildVector(VT, dl, Ops);
3529 SDValue DAGTypeLegalizer::WidenVecOp_EXTRACT_SUBVECTOR(SDNode *N) {
3530 SDValue InOp = GetWidenedVector(N->getOperand(0));
3531 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, SDLoc(N),
3532 N->getValueType(0), InOp, N->getOperand(1));
3535 SDValue DAGTypeLegalizer::WidenVecOp_EXTRACT_VECTOR_ELT(SDNode *N) {
3536 SDValue InOp = GetWidenedVector(N->getOperand(0));
3537 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N),
3538 N->getValueType(0), InOp, N->getOperand(1));
3541 SDValue DAGTypeLegalizer::WidenVecOp_STORE(SDNode *N) {
3542 // We have to widen the value, but we want only to store the original
3544 StoreSDNode *ST = cast<StoreSDNode>(N);
3546 SmallVector<SDValue, 16> StChain;
3547 if (ST->isTruncatingStore())
3548 GenWidenVectorTruncStores(StChain, ST);
3550 GenWidenVectorStores(StChain, ST);
3552 if (StChain.size() == 1)
3555 return DAG.getNode(ISD::TokenFactor, SDLoc(ST), MVT::Other, StChain);
3558 SDValue DAGTypeLegalizer::WidenVecOp_MSTORE(SDNode *N, unsigned OpNo) {
3559 MaskedStoreSDNode *MST = cast<MaskedStoreSDNode>(N);
3560 SDValue Mask = MST->getMask();
3561 EVT MaskVT = Mask.getValueType();
3562 SDValue StVal = MST->getValue();
3564 SDValue WideVal = GetWidenedVector(StVal);
3567 if (OpNo == 2 || getTypeAction(MaskVT) == TargetLowering::TypeWidenVector)
3568 Mask = GetWidenedVector(Mask);
3570 // The mask should be widened as well.
3571 EVT BoolVT = getSetCCResultType(WideVal.getValueType());
3572 // We can't use ModifyToType() because we should fill the mask with
3574 unsigned WidenNumElts = BoolVT.getVectorNumElements();
3575 unsigned MaskNumElts = MaskVT.getVectorNumElements();
3577 unsigned NumConcat = WidenNumElts / MaskNumElts;
3578 SmallVector<SDValue, 16> Ops(NumConcat);
3579 SDValue ZeroVal = DAG.getConstant(0, dl, MaskVT);
3581 for (unsigned i = 1; i != NumConcat; ++i)
3584 Mask = DAG.getNode(ISD::CONCAT_VECTORS, dl, BoolVT, Ops);
3586 assert(Mask.getValueType().getVectorNumElements() ==
3587 WideVal.getValueType().getVectorNumElements() &&
3588 "Mask and data vectors should have the same number of elements");
3589 return DAG.getMaskedStore(MST->getChain(), dl, WideVal, MST->getBasePtr(),
3590 Mask, MST->getMemoryVT(), MST->getMemOperand(),
3591 false, MST->isCompressingStore());
3594 SDValue DAGTypeLegalizer::WidenVecOp_MSCATTER(SDNode *N, unsigned OpNo) {
3595 assert(OpNo == 1 && "Can widen only data operand of mscatter");
3596 MaskedScatterSDNode *MSC = cast<MaskedScatterSDNode>(N);
3597 SDValue DataOp = MSC->getValue();
3598 SDValue Mask = MSC->getMask();
3601 SDValue WideVal = GetWidenedVector(DataOp);
3602 EVT WideVT = WideVal.getValueType();
3603 unsigned NumElts = WideVal.getValueType().getVectorNumElements();
3606 // The mask should be widened as well.
3607 Mask = WidenTargetBoolean(Mask, WideVT, true);
3610 SDValue Index = MSC->getIndex();
3611 EVT WideIndexVT = EVT::getVectorVT(*DAG.getContext(),
3612 Index.getValueType().getScalarType(),
3614 Index = ModifyToType(Index, WideIndexVT);
3616 SDValue Ops[] = {MSC->getChain(), WideVal, Mask, MSC->getBasePtr(), Index};
3617 return DAG.getMaskedScatter(DAG.getVTList(MVT::Other),
3618 MSC->getMemoryVT(), dl, Ops,
3619 MSC->getMemOperand());
3622 SDValue DAGTypeLegalizer::WidenVecOp_SETCC(SDNode *N) {
3623 SDValue InOp0 = GetWidenedVector(N->getOperand(0));
3624 SDValue InOp1 = GetWidenedVector(N->getOperand(1));
3627 // WARNING: In this code we widen the compare instruction with garbage.
3628 // This garbage may contain denormal floats which may be slow. Is this a real
3629 // concern ? Should we zero the unused lanes if this is a float compare ?
3631 // Get a new SETCC node to compare the newly widened operands.
3632 // Only some of the compared elements are legal.
3633 EVT SVT = TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(),
3634 InOp0.getValueType());
3635 SDValue WideSETCC = DAG.getNode(ISD::SETCC, SDLoc(N),
3636 SVT, InOp0, InOp1, N->getOperand(2));
3638 // Extract the needed results from the result vector.
3639 EVT ResVT = EVT::getVectorVT(*DAG.getContext(),
3640 SVT.getVectorElementType(),
3641 N->getValueType(0).getVectorNumElements());
3642 SDValue CC = DAG.getNode(
3643 ISD::EXTRACT_SUBVECTOR, dl, ResVT, WideSETCC,
3644 DAG.getConstant(0, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
3646 return PromoteTargetBoolean(CC, N->getValueType(0));
3650 //===----------------------------------------------------------------------===//
3651 // Vector Widening Utilities
3652 //===----------------------------------------------------------------------===//
3654 // Utility function to find the type to chop up a widen vector for load/store
3655 // TLI: Target lowering used to determine legal types.
3656 // Width: Width left need to load/store.
3657 // WidenVT: The widen vector type to load to/store from
3658 // Align: If 0, don't allow use of a wider type
3659 // WidenEx: If Align is not 0, the amount additional we can load/store from.
3661 static EVT FindMemType(SelectionDAG& DAG, const TargetLowering &TLI,
3662 unsigned Width, EVT WidenVT,
3663 unsigned Align = 0, unsigned WidenEx = 0) {
3664 EVT WidenEltVT = WidenVT.getVectorElementType();
3665 unsigned WidenWidth = WidenVT.getSizeInBits();
3666 unsigned WidenEltWidth = WidenEltVT.getSizeInBits();
3667 unsigned AlignInBits = Align*8;
3669 // If we have one element to load/store, return it.
3670 EVT RetVT = WidenEltVT;
3671 if (Width == WidenEltWidth)
3674 // See if there is larger legal integer than the element type to load/store.
3676 for (VT = (unsigned)MVT::LAST_INTEGER_VALUETYPE;
3677 VT >= (unsigned)MVT::FIRST_INTEGER_VALUETYPE; --VT) {
3678 EVT MemVT((MVT::SimpleValueType) VT);
3679 unsigned MemVTWidth = MemVT.getSizeInBits();
3680 if (MemVT.getSizeInBits() <= WidenEltWidth)
3682 auto Action = TLI.getTypeAction(*DAG.getContext(), MemVT);
3683 if ((Action == TargetLowering::TypeLegal ||
3684 Action == TargetLowering::TypePromoteInteger) &&
3685 (WidenWidth % MemVTWidth) == 0 &&
3686 isPowerOf2_32(WidenWidth / MemVTWidth) &&
3687 (MemVTWidth <= Width ||
3688 (Align!=0 && MemVTWidth<=AlignInBits && MemVTWidth<=Width+WidenEx))) {
3694 // See if there is a larger vector type to load/store that has the same vector
3695 // element type and is evenly divisible with the WidenVT.
3696 for (VT = (unsigned)MVT::LAST_VECTOR_VALUETYPE;
3697 VT >= (unsigned)MVT::FIRST_VECTOR_VALUETYPE; --VT) {
3698 EVT MemVT = (MVT::SimpleValueType) VT;
3699 unsigned MemVTWidth = MemVT.getSizeInBits();
3700 if (TLI.isTypeLegal(MemVT) && WidenEltVT == MemVT.getVectorElementType() &&
3701 (WidenWidth % MemVTWidth) == 0 &&
3702 isPowerOf2_32(WidenWidth / MemVTWidth) &&
3703 (MemVTWidth <= Width ||
3704 (Align!=0 && MemVTWidth<=AlignInBits && MemVTWidth<=Width+WidenEx))) {
3705 if (RetVT.getSizeInBits() < MemVTWidth || MemVT == WidenVT)
3713 // Builds a vector type from scalar loads
3714 // VecTy: Resulting Vector type
3715 // LDOps: Load operators to build a vector type
3716 // [Start,End) the list of loads to use.
3717 static SDValue BuildVectorFromScalar(SelectionDAG& DAG, EVT VecTy,
3718 SmallVectorImpl<SDValue> &LdOps,
3719 unsigned Start, unsigned End) {
3720 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
3721 SDLoc dl(LdOps[Start]);
3722 EVT LdTy = LdOps[Start].getValueType();
3723 unsigned Width = VecTy.getSizeInBits();
3724 unsigned NumElts = Width / LdTy.getSizeInBits();
3725 EVT NewVecVT = EVT::getVectorVT(*DAG.getContext(), LdTy, NumElts);
3728 SDValue VecOp = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, NewVecVT,LdOps[Start]);
3730 for (unsigned i = Start + 1; i != End; ++i) {
3731 EVT NewLdTy = LdOps[i].getValueType();
3732 if (NewLdTy != LdTy) {
3733 NumElts = Width / NewLdTy.getSizeInBits();
3734 NewVecVT = EVT::getVectorVT(*DAG.getContext(), NewLdTy, NumElts);
3735 VecOp = DAG.getNode(ISD::BITCAST, dl, NewVecVT, VecOp);
3736 // Readjust position and vector position based on new load type.
3737 Idx = Idx * LdTy.getSizeInBits() / NewLdTy.getSizeInBits();
3740 VecOp = DAG.getNode(
3741 ISD::INSERT_VECTOR_ELT, dl, NewVecVT, VecOp, LdOps[i],
3742 DAG.getConstant(Idx++, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
3744 return DAG.getNode(ISD::BITCAST, dl, VecTy, VecOp);
3747 SDValue DAGTypeLegalizer::GenWidenVectorLoads(SmallVectorImpl<SDValue> &LdChain,
3749 // The strategy assumes that we can efficiently load power-of-two widths.
3750 // The routine chops the vector into the largest vector loads with the same
3751 // element type or scalar loads and then recombines it to the widen vector
3753 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(),LD->getValueType(0));
3754 unsigned WidenWidth = WidenVT.getSizeInBits();
3755 EVT LdVT = LD->getMemoryVT();
3757 assert(LdVT.isVector() && WidenVT.isVector());
3758 assert(LdVT.getVectorElementType() == WidenVT.getVectorElementType());
3761 SDValue Chain = LD->getChain();
3762 SDValue BasePtr = LD->getBasePtr();
3763 unsigned Align = LD->getAlignment();
3764 MachineMemOperand::Flags MMOFlags = LD->getMemOperand()->getFlags();
3765 AAMDNodes AAInfo = LD->getAAInfo();
3767 int LdWidth = LdVT.getSizeInBits();
3768 int WidthDiff = WidenWidth - LdWidth;
3769 unsigned LdAlign = LD->isVolatile() ? 0 : Align; // Allow wider loads.
3771 // Find the vector type that can load from.
3772 EVT NewVT = FindMemType(DAG, TLI, LdWidth, WidenVT, LdAlign, WidthDiff);
3773 int NewVTWidth = NewVT.getSizeInBits();
3774 SDValue LdOp = DAG.getLoad(NewVT, dl, Chain, BasePtr, LD->getPointerInfo(),
3775 Align, MMOFlags, AAInfo);
3776 LdChain.push_back(LdOp.getValue(1));
3778 // Check if we can load the element with one instruction.
3779 if (LdWidth <= NewVTWidth) {
3780 if (!NewVT.isVector()) {
3781 unsigned NumElts = WidenWidth / NewVTWidth;
3782 EVT NewVecVT = EVT::getVectorVT(*DAG.getContext(), NewVT, NumElts);
3783 SDValue VecOp = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, NewVecVT, LdOp);
3784 return DAG.getNode(ISD::BITCAST, dl, WidenVT, VecOp);
3786 if (NewVT == WidenVT)
3789 assert(WidenWidth % NewVTWidth == 0);
3790 unsigned NumConcat = WidenWidth / NewVTWidth;
3791 SmallVector<SDValue, 16> ConcatOps(NumConcat);
3792 SDValue UndefVal = DAG.getUNDEF(NewVT);
3793 ConcatOps[0] = LdOp;
3794 for (unsigned i = 1; i != NumConcat; ++i)
3795 ConcatOps[i] = UndefVal;
3796 return DAG.getNode(ISD::CONCAT_VECTORS, dl, WidenVT, ConcatOps);
3799 // Load vector by using multiple loads from largest vector to scalar.
3800 SmallVector<SDValue, 16> LdOps;
3801 LdOps.push_back(LdOp);
3803 LdWidth -= NewVTWidth;
3804 unsigned Offset = 0;
3806 while (LdWidth > 0) {
3807 unsigned Increment = NewVTWidth / 8;
3808 Offset += Increment;
3809 BasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(), BasePtr,
3810 DAG.getConstant(Increment, dl, BasePtr.getValueType()));
3813 if (LdWidth < NewVTWidth) {
3814 // The current type we are using is too large. Find a better size.
3815 NewVT = FindMemType(DAG, TLI, LdWidth, WidenVT, LdAlign, WidthDiff);
3816 NewVTWidth = NewVT.getSizeInBits();
3817 L = DAG.getLoad(NewVT, dl, Chain, BasePtr,
3818 LD->getPointerInfo().getWithOffset(Offset),
3819 MinAlign(Align, Increment), MMOFlags, AAInfo);
3820 LdChain.push_back(L.getValue(1));
3821 if (L->getValueType(0).isVector() && NewVTWidth >= LdWidth) {
3822 // Later code assumes the vector loads produced will be mergeable, so we
3823 // must pad the final entry up to the previous width. Scalars are
3824 // combined separately.
3825 SmallVector<SDValue, 16> Loads;
3827 unsigned size = L->getValueSizeInBits(0);
3828 while (size < LdOp->getValueSizeInBits(0)) {
3829 Loads.push_back(DAG.getUNDEF(L->getValueType(0)));
3830 size += L->getValueSizeInBits(0);
3832 L = DAG.getNode(ISD::CONCAT_VECTORS, dl, LdOp->getValueType(0), Loads);
3835 L = DAG.getLoad(NewVT, dl, Chain, BasePtr,
3836 LD->getPointerInfo().getWithOffset(Offset),
3837 MinAlign(Align, Increment), MMOFlags, AAInfo);
3838 LdChain.push_back(L.getValue(1));
3844 LdWidth -= NewVTWidth;
3847 // Build the vector from the load operations.
3848 unsigned End = LdOps.size();
3849 if (!LdOps[0].getValueType().isVector())
3850 // All the loads are scalar loads.
3851 return BuildVectorFromScalar(DAG, WidenVT, LdOps, 0, End);
3853 // If the load contains vectors, build the vector using concat vector.
3854 // All of the vectors used to load are power-of-2, and the scalar loads can be
3855 // combined to make a power-of-2 vector.
3856 SmallVector<SDValue, 16> ConcatOps(End);
3859 EVT LdTy = LdOps[i].getValueType();
3860 // First, combine the scalar loads to a vector.
3861 if (!LdTy.isVector()) {
3862 for (--i; i >= 0; --i) {
3863 LdTy = LdOps[i].getValueType();
3864 if (LdTy.isVector())
3867 ConcatOps[--Idx] = BuildVectorFromScalar(DAG, LdTy, LdOps, i + 1, End);
3869 ConcatOps[--Idx] = LdOps[i];
3870 for (--i; i >= 0; --i) {
3871 EVT NewLdTy = LdOps[i].getValueType();
3872 if (NewLdTy != LdTy) {
3873 // Create a larger vector.
3874 ConcatOps[End-1] = DAG.getNode(ISD::CONCAT_VECTORS, dl, NewLdTy,
3875 makeArrayRef(&ConcatOps[Idx], End - Idx));
3879 ConcatOps[--Idx] = LdOps[i];
3882 if (WidenWidth == LdTy.getSizeInBits() * (End - Idx))
3883 return DAG.getNode(ISD::CONCAT_VECTORS, dl, WidenVT,
3884 makeArrayRef(&ConcatOps[Idx], End - Idx));
3886 // We need to fill the rest with undefs to build the vector.
3887 unsigned NumOps = WidenWidth / LdTy.getSizeInBits();
3888 SmallVector<SDValue, 16> WidenOps(NumOps);
3889 SDValue UndefVal = DAG.getUNDEF(LdTy);
3892 for (; i != End-Idx; ++i)
3893 WidenOps[i] = ConcatOps[Idx+i];
3894 for (; i != NumOps; ++i)
3895 WidenOps[i] = UndefVal;
3897 return DAG.getNode(ISD::CONCAT_VECTORS, dl, WidenVT, WidenOps);
3901 DAGTypeLegalizer::GenWidenVectorExtLoads(SmallVectorImpl<SDValue> &LdChain,
3903 ISD::LoadExtType ExtType) {
3904 // For extension loads, it may not be more efficient to chop up the vector
3905 // and then extend it. Instead, we unroll the load and build a new vector.
3906 EVT WidenVT = TLI.getTypeToTransformTo(*DAG.getContext(),LD->getValueType(0));
3907 EVT LdVT = LD->getMemoryVT();
3909 assert(LdVT.isVector() && WidenVT.isVector());
3912 SDValue Chain = LD->getChain();
3913 SDValue BasePtr = LD->getBasePtr();
3914 unsigned Align = LD->getAlignment();
3915 MachineMemOperand::Flags MMOFlags = LD->getMemOperand()->getFlags();
3916 AAMDNodes AAInfo = LD->getAAInfo();
3918 EVT EltVT = WidenVT.getVectorElementType();
3919 EVT LdEltVT = LdVT.getVectorElementType();
3920 unsigned NumElts = LdVT.getVectorNumElements();
3922 // Load each element and widen.
3923 unsigned WidenNumElts = WidenVT.getVectorNumElements();
3924 SmallVector<SDValue, 16> Ops(WidenNumElts);
3925 unsigned Increment = LdEltVT.getSizeInBits() / 8;
3927 DAG.getExtLoad(ExtType, dl, EltVT, Chain, BasePtr, LD->getPointerInfo(),
3928 LdEltVT, Align, MMOFlags, AAInfo);
3929 LdChain.push_back(Ops[0].getValue(1));
3930 unsigned i = 0, Offset = Increment;
3931 for (i=1; i < NumElts; ++i, Offset += Increment) {
3932 SDValue NewBasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(),
3934 DAG.getConstant(Offset, dl,
3935 BasePtr.getValueType()));
3936 Ops[i] = DAG.getExtLoad(ExtType, dl, EltVT, Chain, NewBasePtr,
3937 LD->getPointerInfo().getWithOffset(Offset), LdEltVT,
3938 Align, MMOFlags, AAInfo);
3939 LdChain.push_back(Ops[i].getValue(1));
3942 // Fill the rest with undefs.
3943 SDValue UndefVal = DAG.getUNDEF(EltVT);
3944 for (; i != WidenNumElts; ++i)
3947 return DAG.getBuildVector(WidenVT, dl, Ops);
3950 void DAGTypeLegalizer::GenWidenVectorStores(SmallVectorImpl<SDValue> &StChain,
3952 // The strategy assumes that we can efficiently store power-of-two widths.
3953 // The routine chops the vector into the largest vector stores with the same
3954 // element type or scalar stores.
3955 SDValue Chain = ST->getChain();
3956 SDValue BasePtr = ST->getBasePtr();
3957 unsigned Align = ST->getAlignment();
3958 MachineMemOperand::Flags MMOFlags = ST->getMemOperand()->getFlags();
3959 AAMDNodes AAInfo = ST->getAAInfo();
3960 SDValue ValOp = GetWidenedVector(ST->getValue());
3963 EVT StVT = ST->getMemoryVT();
3964 unsigned StWidth = StVT.getSizeInBits();
3965 EVT ValVT = ValOp.getValueType();
3966 unsigned ValWidth = ValVT.getSizeInBits();
3967 EVT ValEltVT = ValVT.getVectorElementType();
3968 unsigned ValEltWidth = ValEltVT.getSizeInBits();
3969 assert(StVT.getVectorElementType() == ValEltVT);
3971 int Idx = 0; // current index to store
3972 unsigned Offset = 0; // offset from base to store
3973 while (StWidth != 0) {
3974 // Find the largest vector type we can store with.
3975 EVT NewVT = FindMemType(DAG, TLI, StWidth, ValVT);
3976 unsigned NewVTWidth = NewVT.getSizeInBits();
3977 unsigned Increment = NewVTWidth / 8;
3978 if (NewVT.isVector()) {
3979 unsigned NumVTElts = NewVT.getVectorNumElements();
3981 SDValue EOp = DAG.getNode(
3982 ISD::EXTRACT_SUBVECTOR, dl, NewVT, ValOp,
3983 DAG.getConstant(Idx, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
3984 StChain.push_back(DAG.getStore(
3985 Chain, dl, EOp, BasePtr, ST->getPointerInfo().getWithOffset(Offset),
3986 MinAlign(Align, Offset), MMOFlags, AAInfo));
3987 StWidth -= NewVTWidth;
3988 Offset += Increment;
3990 BasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(), BasePtr,
3991 DAG.getConstant(Increment, dl,
3992 BasePtr.getValueType()));
3993 } while (StWidth != 0 && StWidth >= NewVTWidth);
3995 // Cast the vector to the scalar type we can store.
3996 unsigned NumElts = ValWidth / NewVTWidth;
3997 EVT NewVecVT = EVT::getVectorVT(*DAG.getContext(), NewVT, NumElts);
3998 SDValue VecOp = DAG.getNode(ISD::BITCAST, dl, NewVecVT, ValOp);
3999 // Readjust index position based on new vector type.
4000 Idx = Idx * ValEltWidth / NewVTWidth;
4002 SDValue EOp = DAG.getNode(
4003 ISD::EXTRACT_VECTOR_ELT, dl, NewVT, VecOp,
4004 DAG.getConstant(Idx++, dl,
4005 TLI.getVectorIdxTy(DAG.getDataLayout())));
4006 StChain.push_back(DAG.getStore(
4007 Chain, dl, EOp, BasePtr, ST->getPointerInfo().getWithOffset(Offset),
4008 MinAlign(Align, Offset), MMOFlags, AAInfo));
4009 StWidth -= NewVTWidth;
4010 Offset += Increment;
4011 BasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(), BasePtr,
4012 DAG.getConstant(Increment, dl,
4013 BasePtr.getValueType()));
4014 } while (StWidth != 0 && StWidth >= NewVTWidth);
4015 // Restore index back to be relative to the original widen element type.
4016 Idx = Idx * NewVTWidth / ValEltWidth;
4022 DAGTypeLegalizer::GenWidenVectorTruncStores(SmallVectorImpl<SDValue> &StChain,
4024 // For extension loads, it may not be more efficient to truncate the vector
4025 // and then store it. Instead, we extract each element and then store it.
4026 SDValue Chain = ST->getChain();
4027 SDValue BasePtr = ST->getBasePtr();
4028 unsigned Align = ST->getAlignment();
4029 MachineMemOperand::Flags MMOFlags = ST->getMemOperand()->getFlags();
4030 AAMDNodes AAInfo = ST->getAAInfo();
4031 SDValue ValOp = GetWidenedVector(ST->getValue());
4034 EVT StVT = ST->getMemoryVT();
4035 EVT ValVT = ValOp.getValueType();
4037 // It must be true that the wide vector type is bigger than where we need to
4039 assert(StVT.isVector() && ValOp.getValueType().isVector());
4040 assert(StVT.bitsLT(ValOp.getValueType()));
4042 // For truncating stores, we can not play the tricks of chopping legal vector
4043 // types and bitcast it to the right type. Instead, we unroll the store.
4044 EVT StEltVT = StVT.getVectorElementType();
4045 EVT ValEltVT = ValVT.getVectorElementType();
4046 unsigned Increment = ValEltVT.getSizeInBits() / 8;
4047 unsigned NumElts = StVT.getVectorNumElements();
4048 SDValue EOp = DAG.getNode(
4049 ISD::EXTRACT_VECTOR_ELT, dl, ValEltVT, ValOp,
4050 DAG.getConstant(0, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
4051 StChain.push_back(DAG.getTruncStore(Chain, dl, EOp, BasePtr,
4052 ST->getPointerInfo(), StEltVT, Align,
4054 unsigned Offset = Increment;
4055 for (unsigned i=1; i < NumElts; ++i, Offset += Increment) {
4056 SDValue NewBasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(),
4058 DAG.getConstant(Offset, dl,
4059 BasePtr.getValueType()));
4060 SDValue EOp = DAG.getNode(
4061 ISD::EXTRACT_VECTOR_ELT, dl, ValEltVT, ValOp,
4062 DAG.getConstant(0, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
4063 StChain.push_back(DAG.getTruncStore(
4064 Chain, dl, EOp, NewBasePtr, ST->getPointerInfo().getWithOffset(Offset),
4065 StEltVT, MinAlign(Align, Offset), MMOFlags, AAInfo));
4069 /// Modifies a vector input (widen or narrows) to a vector of NVT. The
4070 /// input vector must have the same element type as NVT.
4071 /// FillWithZeroes specifies that the vector should be widened with zeroes.
4072 SDValue DAGTypeLegalizer::ModifyToType(SDValue InOp, EVT NVT,
4073 bool FillWithZeroes) {
4074 // Note that InOp might have been widened so it might already have
4075 // the right width or it might need be narrowed.
4076 EVT InVT = InOp.getValueType();
4077 assert(InVT.getVectorElementType() == NVT.getVectorElementType() &&
4078 "input and widen element type must match");
4081 // Check if InOp already has the right width.
4085 unsigned InNumElts = InVT.getVectorNumElements();
4086 unsigned WidenNumElts = NVT.getVectorNumElements();
4087 if (WidenNumElts > InNumElts && WidenNumElts % InNumElts == 0) {
4088 unsigned NumConcat = WidenNumElts / InNumElts;
4089 SmallVector<SDValue, 16> Ops(NumConcat);
4090 SDValue FillVal = FillWithZeroes ? DAG.getConstant(0, dl, InVT) :
4093 for (unsigned i = 1; i != NumConcat; ++i)
4096 return DAG.getNode(ISD::CONCAT_VECTORS, dl, NVT, Ops);
4099 if (WidenNumElts < InNumElts && InNumElts % WidenNumElts)
4101 ISD::EXTRACT_SUBVECTOR, dl, NVT, InOp,
4102 DAG.getConstant(0, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
4104 // Fall back to extract and build.
4105 SmallVector<SDValue, 16> Ops(WidenNumElts);
4106 EVT EltVT = NVT.getVectorElementType();
4107 unsigned MinNumElts = std::min(WidenNumElts, InNumElts);
4109 for (Idx = 0; Idx < MinNumElts; ++Idx)
4110 Ops[Idx] = DAG.getNode(
4111 ISD::EXTRACT_VECTOR_ELT, dl, EltVT, InOp,
4112 DAG.getConstant(Idx, dl, TLI.getVectorIdxTy(DAG.getDataLayout())));
4114 SDValue FillVal = FillWithZeroes ? DAG.getConstant(0, dl, EltVT) :
4115 DAG.getUNDEF(EltVT);
4116 for ( ; Idx < WidenNumElts; ++Idx)
4118 return DAG.getBuildVector(NVT, dl, Ops);