1 //===-- LegalizeDAG.cpp - Implement SelectionDAG::Legalize ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the SelectionDAG::Legalize method.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/SelectionDAG.h"
15 #include "llvm/CodeGen/MachineFunction.h"
16 #include "llvm/CodeGen/MachineFrameInfo.h"
17 #include "llvm/CodeGen/MachineJumpTableInfo.h"
18 #include "llvm/Target/TargetFrameInfo.h"
19 #include "llvm/Target/TargetLowering.h"
20 #include "llvm/Target/TargetData.h"
21 #include "llvm/Target/TargetMachine.h"
22 #include "llvm/Target/TargetOptions.h"
23 #include "llvm/CallingConv.h"
24 #include "llvm/Constants.h"
25 #include "llvm/DerivedTypes.h"
26 #include "llvm/Support/MathExtras.h"
27 #include "llvm/Support/CommandLine.h"
28 #include "llvm/Support/Compiler.h"
29 #include "llvm/ADT/DenseMap.h"
30 #include "llvm/ADT/SmallVector.h"
31 #include "llvm/ADT/SmallPtrSet.h"
37 ViewLegalizeDAGs("view-legalize-dags", cl::Hidden,
38 cl::desc("Pop up a window to show dags before legalize"));
40 static const bool ViewLegalizeDAGs = 0;
43 //===----------------------------------------------------------------------===//
44 /// SelectionDAGLegalize - This takes an arbitrary SelectionDAG as input and
45 /// hacks on it until the target machine can handle it. This involves
46 /// eliminating value sizes the machine cannot handle (promoting small sizes to
47 /// large sizes or splitting up large values into small values) as well as
48 /// eliminating operations the machine cannot handle.
50 /// This code also does a small amount of optimization and recognition of idioms
51 /// as part of its processing. For example, if a target does not support a
52 /// 'setcc' instruction efficiently, but does support 'brcc' instruction, this
53 /// will attempt merge setcc and brc instructions into brcc's.
56 class VISIBILITY_HIDDEN SelectionDAGLegalize {
60 // Libcall insertion helpers.
62 /// LastCALLSEQ_END - This keeps track of the CALLSEQ_END node that has been
63 /// legalized. We use this to ensure that calls are properly serialized
64 /// against each other, including inserted libcalls.
65 SDOperand LastCALLSEQ_END;
67 /// IsLegalizingCall - This member is used *only* for purposes of providing
68 /// helpful assertions that a libcall isn't created while another call is
69 /// being legalized (which could lead to non-serialized call sequences).
70 bool IsLegalizingCall;
73 Legal, // The target natively supports this operation.
74 Promote, // This operation should be executed in a larger type.
75 Expand // Try to expand this to other ops, otherwise use a libcall.
78 /// ValueTypeActions - This is a bitvector that contains two bits for each
79 /// value type, where the two bits correspond to the LegalizeAction enum.
80 /// This can be queried with "getTypeAction(VT)".
81 TargetLowering::ValueTypeActionImpl ValueTypeActions;
83 /// LegalizedNodes - For nodes that are of legal width, and that have more
84 /// than one use, this map indicates what regularized operand to use. This
85 /// allows us to avoid legalizing the same thing more than once.
86 DenseMap<SDOperand, SDOperand> LegalizedNodes;
88 /// PromotedNodes - For nodes that are below legal width, and that have more
89 /// than one use, this map indicates what promoted value to use. This allows
90 /// us to avoid promoting the same thing more than once.
91 DenseMap<SDOperand, SDOperand> PromotedNodes;
93 /// ExpandedNodes - For nodes that need to be expanded this map indicates
94 /// which which operands are the expanded version of the input. This allows
95 /// us to avoid expanding the same node more than once.
96 DenseMap<SDOperand, std::pair<SDOperand, SDOperand> > ExpandedNodes;
98 /// SplitNodes - For vector nodes that need to be split, this map indicates
99 /// which which operands are the split version of the input. This allows us
100 /// to avoid splitting the same node more than once.
101 std::map<SDOperand, std::pair<SDOperand, SDOperand> > SplitNodes;
103 /// ScalarizedNodes - For nodes that need to be converted from vector types to
104 /// scalar types, this contains the mapping of ones we have already
105 /// processed to the result.
106 std::map<SDOperand, SDOperand> ScalarizedNodes;
108 void AddLegalizedOperand(SDOperand From, SDOperand To) {
109 LegalizedNodes.insert(std::make_pair(From, To));
110 // If someone requests legalization of the new node, return itself.
112 LegalizedNodes.insert(std::make_pair(To, To));
114 void AddPromotedOperand(SDOperand From, SDOperand To) {
115 bool isNew = PromotedNodes.insert(std::make_pair(From, To));
116 assert(isNew && "Got into the map somehow?");
117 // If someone requests legalization of the new node, return itself.
118 LegalizedNodes.insert(std::make_pair(To, To));
123 SelectionDAGLegalize(SelectionDAG &DAG);
125 /// getTypeAction - Return how we should legalize values of this type, either
126 /// it is already legal or we need to expand it into multiple registers of
127 /// smaller integer type, or we need to promote it to a larger type.
128 LegalizeAction getTypeAction(MVT::ValueType VT) const {
129 return (LegalizeAction)ValueTypeActions.getTypeAction(VT);
132 /// isTypeLegal - Return true if this type is legal on this target.
134 bool isTypeLegal(MVT::ValueType VT) const {
135 return getTypeAction(VT) == Legal;
141 /// HandleOp - Legalize, Promote, or Expand the specified operand as
142 /// appropriate for its type.
143 void HandleOp(SDOperand Op);
145 /// LegalizeOp - We know that the specified value has a legal type.
146 /// Recursively ensure that the operands have legal types, then return the
148 SDOperand LegalizeOp(SDOperand O);
150 /// UnrollVectorOp - We know that the given vector has a legal type, however
151 /// the operation it performs is not legal and is an operation that we have
152 /// no way of lowering. "Unroll" the vector, splitting out the scalars and
153 /// operating on each element individually.
154 SDOperand UnrollVectorOp(SDOperand O);
156 /// PromoteOp - Given an operation that produces a value in an invalid type,
157 /// promote it to compute the value into a larger type. The produced value
158 /// will have the correct bits for the low portion of the register, but no
159 /// guarantee is made about the top bits: it may be zero, sign-extended, or
161 SDOperand PromoteOp(SDOperand O);
163 /// ExpandOp - Expand the specified SDOperand into its two component pieces
164 /// Lo&Hi. Note that the Op MUST be an expanded type. As a result of this,
165 /// the LegalizeNodes map is filled in for any results that are not expanded,
166 /// the ExpandedNodes map is filled in for any results that are expanded, and
167 /// the Lo/Hi values are returned. This applies to integer types and Vector
169 void ExpandOp(SDOperand O, SDOperand &Lo, SDOperand &Hi);
171 /// SplitVectorOp - Given an operand of vector type, break it down into
172 /// two smaller values.
173 void SplitVectorOp(SDOperand O, SDOperand &Lo, SDOperand &Hi);
175 /// ScalarizeVectorOp - Given an operand of single-element vector type
176 /// (e.g. v1f32), convert it into the equivalent operation that returns a
177 /// scalar (e.g. f32) value.
178 SDOperand ScalarizeVectorOp(SDOperand O);
180 /// isShuffleLegal - Return true if a vector shuffle is legal with the
181 /// specified mask and type. Targets can specify exactly which masks they
182 /// support and the code generator is tasked with not creating illegal masks.
184 /// Note that this will also return true for shuffles that are promoted to a
187 /// If this is a legal shuffle, this method returns the (possibly promoted)
188 /// build_vector Mask. If it's not a legal shuffle, it returns null.
189 SDNode *isShuffleLegal(MVT::ValueType VT, SDOperand Mask) const;
191 bool LegalizeAllNodesNotLeadingTo(SDNode *N, SDNode *Dest,
192 SmallPtrSet<SDNode*, 32> &NodesLeadingTo);
194 void LegalizeSetCCOperands(SDOperand &LHS, SDOperand &RHS, SDOperand &CC);
196 SDOperand ExpandLibCall(const char *Name, SDNode *Node, bool isSigned,
198 SDOperand ExpandIntToFP(bool isSigned, MVT::ValueType DestTy,
201 SDOperand ExpandBIT_CONVERT(MVT::ValueType DestVT, SDOperand SrcOp);
202 SDOperand ExpandBUILD_VECTOR(SDNode *Node);
203 SDOperand ExpandSCALAR_TO_VECTOR(SDNode *Node);
204 SDOperand ExpandLegalINT_TO_FP(bool isSigned,
206 MVT::ValueType DestVT);
207 SDOperand PromoteLegalINT_TO_FP(SDOperand LegalOp, MVT::ValueType DestVT,
209 SDOperand PromoteLegalFP_TO_INT(SDOperand LegalOp, MVT::ValueType DestVT,
212 SDOperand ExpandBSWAP(SDOperand Op);
213 SDOperand ExpandBitCount(unsigned Opc, SDOperand Op);
214 bool ExpandShift(unsigned Opc, SDOperand Op, SDOperand Amt,
215 SDOperand &Lo, SDOperand &Hi);
216 void ExpandShiftParts(unsigned NodeOp, SDOperand Op, SDOperand Amt,
217 SDOperand &Lo, SDOperand &Hi);
219 SDOperand ExpandEXTRACT_SUBVECTOR(SDOperand Op);
220 SDOperand ExpandEXTRACT_VECTOR_ELT(SDOperand Op);
222 SDOperand getIntPtrConstant(uint64_t Val) {
223 return DAG.getConstant(Val, TLI.getPointerTy());
228 /// isVectorShuffleLegal - Return true if a vector shuffle is legal with the
229 /// specified mask and type. Targets can specify exactly which masks they
230 /// support and the code generator is tasked with not creating illegal masks.
232 /// Note that this will also return true for shuffles that are promoted to a
234 SDNode *SelectionDAGLegalize::isShuffleLegal(MVT::ValueType VT,
235 SDOperand Mask) const {
236 switch (TLI.getOperationAction(ISD::VECTOR_SHUFFLE, VT)) {
238 case TargetLowering::Legal:
239 case TargetLowering::Custom:
241 case TargetLowering::Promote: {
242 // If this is promoted to a different type, convert the shuffle mask and
243 // ask if it is legal in the promoted type!
244 MVT::ValueType NVT = TLI.getTypeToPromoteTo(ISD::VECTOR_SHUFFLE, VT);
246 // If we changed # elements, change the shuffle mask.
247 unsigned NumEltsGrowth =
248 MVT::getVectorNumElements(NVT) / MVT::getVectorNumElements(VT);
249 assert(NumEltsGrowth && "Cannot promote to vector type with fewer elts!");
250 if (NumEltsGrowth > 1) {
251 // Renumber the elements.
252 SmallVector<SDOperand, 8> Ops;
253 for (unsigned i = 0, e = Mask.getNumOperands(); i != e; ++i) {
254 SDOperand InOp = Mask.getOperand(i);
255 for (unsigned j = 0; j != NumEltsGrowth; ++j) {
256 if (InOp.getOpcode() == ISD::UNDEF)
257 Ops.push_back(DAG.getNode(ISD::UNDEF, MVT::i32));
259 unsigned InEltNo = cast<ConstantSDNode>(InOp)->getValue();
260 Ops.push_back(DAG.getConstant(InEltNo*NumEltsGrowth+j, MVT::i32));
264 Mask = DAG.getNode(ISD::BUILD_VECTOR, NVT, &Ops[0], Ops.size());
270 return TLI.isShuffleMaskLegal(Mask, VT) ? Mask.Val : 0;
273 SelectionDAGLegalize::SelectionDAGLegalize(SelectionDAG &dag)
274 : TLI(dag.getTargetLoweringInfo()), DAG(dag),
275 ValueTypeActions(TLI.getValueTypeActions()) {
276 assert(MVT::LAST_VALUETYPE <= 32 &&
277 "Too many value types for ValueTypeActions to hold!");
280 /// ComputeTopDownOrdering - Compute a top-down ordering of the dag, where Order
281 /// contains all of a nodes operands before it contains the node.
282 static void ComputeTopDownOrdering(SelectionDAG &DAG,
283 SmallVector<SDNode*, 64> &Order) {
285 DenseMap<SDNode*, unsigned> Visited;
286 std::vector<SDNode*> Worklist;
287 Worklist.reserve(128);
289 // Compute ordering from all of the leaves in the graphs, those (like the
290 // entry node) that have no operands.
291 for (SelectionDAG::allnodes_iterator I = DAG.allnodes_begin(),
292 E = DAG.allnodes_end(); I != E; ++I) {
293 if (I->getNumOperands() == 0) {
295 Worklist.push_back(I);
299 while (!Worklist.empty()) {
300 SDNode *N = Worklist.back();
303 if (++Visited[N] != N->getNumOperands())
304 continue; // Haven't visited all operands yet
308 // Now that we have N in, add anything that uses it if all of their operands
310 for (SDNode::use_iterator UI = N->use_begin(), E = N->use_end();
312 Worklist.push_back(*UI);
315 assert(Order.size() == Visited.size() &&
317 (unsigned)std::distance(DAG.allnodes_begin(), DAG.allnodes_end()) &&
318 "Error: DAG is cyclic!");
322 void SelectionDAGLegalize::LegalizeDAG() {
323 LastCALLSEQ_END = DAG.getEntryNode();
324 IsLegalizingCall = false;
326 // The legalize process is inherently a bottom-up recursive process (users
327 // legalize their uses before themselves). Given infinite stack space, we
328 // could just start legalizing on the root and traverse the whole graph. In
329 // practice however, this causes us to run out of stack space on large basic
330 // blocks. To avoid this problem, compute an ordering of the nodes where each
331 // node is only legalized after all of its operands are legalized.
332 SmallVector<SDNode*, 64> Order;
333 ComputeTopDownOrdering(DAG, Order);
335 for (unsigned i = 0, e = Order.size(); i != e; ++i)
336 HandleOp(SDOperand(Order[i], 0));
338 // Finally, it's possible the root changed. Get the new root.
339 SDOperand OldRoot = DAG.getRoot();
340 assert(LegalizedNodes.count(OldRoot) && "Root didn't get legalized?");
341 DAG.setRoot(LegalizedNodes[OldRoot]);
343 ExpandedNodes.clear();
344 LegalizedNodes.clear();
345 PromotedNodes.clear();
347 ScalarizedNodes.clear();
349 // Remove dead nodes now.
350 DAG.RemoveDeadNodes();
354 /// FindCallEndFromCallStart - Given a chained node that is part of a call
355 /// sequence, find the CALLSEQ_END node that terminates the call sequence.
356 static SDNode *FindCallEndFromCallStart(SDNode *Node) {
357 if (Node->getOpcode() == ISD::CALLSEQ_END)
359 if (Node->use_empty())
360 return 0; // No CallSeqEnd
362 // The chain is usually at the end.
363 SDOperand TheChain(Node, Node->getNumValues()-1);
364 if (TheChain.getValueType() != MVT::Other) {
365 // Sometimes it's at the beginning.
366 TheChain = SDOperand(Node, 0);
367 if (TheChain.getValueType() != MVT::Other) {
368 // Otherwise, hunt for it.
369 for (unsigned i = 1, e = Node->getNumValues(); i != e; ++i)
370 if (Node->getValueType(i) == MVT::Other) {
371 TheChain = SDOperand(Node, i);
375 // Otherwise, we walked into a node without a chain.
376 if (TheChain.getValueType() != MVT::Other)
381 for (SDNode::use_iterator UI = Node->use_begin(),
382 E = Node->use_end(); UI != E; ++UI) {
384 // Make sure to only follow users of our token chain.
386 for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i)
387 if (User->getOperand(i) == TheChain)
388 if (SDNode *Result = FindCallEndFromCallStart(User))
394 /// FindCallStartFromCallEnd - Given a chained node that is part of a call
395 /// sequence, find the CALLSEQ_START node that initiates the call sequence.
396 static SDNode *FindCallStartFromCallEnd(SDNode *Node) {
397 assert(Node && "Didn't find callseq_start for a call??");
398 if (Node->getOpcode() == ISD::CALLSEQ_START) return Node;
400 assert(Node->getOperand(0).getValueType() == MVT::Other &&
401 "Node doesn't have a token chain argument!");
402 return FindCallStartFromCallEnd(Node->getOperand(0).Val);
405 /// LegalizeAllNodesNotLeadingTo - Recursively walk the uses of N, looking to
406 /// see if any uses can reach Dest. If no dest operands can get to dest,
407 /// legalize them, legalize ourself, and return false, otherwise, return true.
409 /// Keep track of the nodes we fine that actually do lead to Dest in
410 /// NodesLeadingTo. This avoids retraversing them exponential number of times.
412 bool SelectionDAGLegalize::LegalizeAllNodesNotLeadingTo(SDNode *N, SDNode *Dest,
413 SmallPtrSet<SDNode*, 32> &NodesLeadingTo) {
414 if (N == Dest) return true; // N certainly leads to Dest :)
416 // If we've already processed this node and it does lead to Dest, there is no
417 // need to reprocess it.
418 if (NodesLeadingTo.count(N)) return true;
420 // If the first result of this node has been already legalized, then it cannot
422 switch (getTypeAction(N->getValueType(0))) {
424 if (LegalizedNodes.count(SDOperand(N, 0))) return false;
427 if (PromotedNodes.count(SDOperand(N, 0))) return false;
430 if (ExpandedNodes.count(SDOperand(N, 0))) return false;
434 // Okay, this node has not already been legalized. Check and legalize all
435 // operands. If none lead to Dest, then we can legalize this node.
436 bool OperandsLeadToDest = false;
437 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
438 OperandsLeadToDest |= // If an operand leads to Dest, so do we.
439 LegalizeAllNodesNotLeadingTo(N->getOperand(i).Val, Dest, NodesLeadingTo);
441 if (OperandsLeadToDest) {
442 NodesLeadingTo.insert(N);
446 // Okay, this node looks safe, legalize it and return false.
447 HandleOp(SDOperand(N, 0));
451 /// HandleOp - Legalize, Promote, or Expand the specified operand as
452 /// appropriate for its type.
453 void SelectionDAGLegalize::HandleOp(SDOperand Op) {
454 MVT::ValueType VT = Op.getValueType();
455 switch (getTypeAction(VT)) {
456 default: assert(0 && "Bad type action!");
457 case Legal: (void)LegalizeOp(Op); break;
458 case Promote: (void)PromoteOp(Op); break;
460 if (!MVT::isVector(VT)) {
461 // If this is an illegal scalar, expand it into its two component
464 if (Op.getOpcode() == ISD::TargetConstant)
465 break; // Allow illegal target nodes.
467 } else if (MVT::getVectorNumElements(VT) == 1) {
468 // If this is an illegal single element vector, convert it to a
470 (void)ScalarizeVectorOp(Op);
472 // Otherwise, this is an illegal multiple element vector.
473 // Split it in half and legalize both parts.
475 SplitVectorOp(Op, X, Y);
481 /// ExpandConstantFP - Expands the ConstantFP node to an integer constant or
482 /// a load from the constant pool.
483 static SDOperand ExpandConstantFP(ConstantFPSDNode *CFP, bool UseCP,
484 SelectionDAG &DAG, TargetLowering &TLI) {
487 // If a FP immediate is precise when represented as a float and if the
488 // target can do an extending load from float to double, we put it into
489 // the constant pool as a float, even if it's is statically typed as a
491 MVT::ValueType VT = CFP->getValueType(0);
492 bool isDouble = VT == MVT::f64;
493 ConstantFP *LLVMC = ConstantFP::get(MVT::getTypeForValueType(VT),
496 if (VT!=MVT::f64 && VT!=MVT::f32)
497 assert(0 && "Invalid type expansion");
498 return DAG.getConstant(LLVMC->getValueAPF().convertToAPInt().getZExtValue(),
499 isDouble ? MVT::i64 : MVT::i32);
502 if (isDouble && CFP->isValueValidForType(MVT::f32, CFP->getValueAPF()) &&
503 // Only do this if the target has a native EXTLOAD instruction from f32.
504 // Do not try to be clever about long doubles (so far)
505 TLI.isLoadXLegal(ISD::EXTLOAD, MVT::f32)) {
506 LLVMC = cast<ConstantFP>(ConstantExpr::getFPTrunc(LLVMC,Type::FloatTy));
511 SDOperand CPIdx = DAG.getConstantPool(LLVMC, TLI.getPointerTy());
513 return DAG.getExtLoad(ISD::EXTLOAD, MVT::f64, DAG.getEntryNode(),
514 CPIdx, NULL, 0, MVT::f32);
516 return DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, NULL, 0);
521 /// ExpandFCOPYSIGNToBitwiseOps - Expands fcopysign to a series of bitwise
524 SDOperand ExpandFCOPYSIGNToBitwiseOps(SDNode *Node, MVT::ValueType NVT,
525 SelectionDAG &DAG, TargetLowering &TLI) {
526 MVT::ValueType VT = Node->getValueType(0);
527 MVT::ValueType SrcVT = Node->getOperand(1).getValueType();
528 assert((SrcVT == MVT::f32 || SrcVT == MVT::f64) &&
529 "fcopysign expansion only supported for f32 and f64");
530 MVT::ValueType SrcNVT = (SrcVT == MVT::f64) ? MVT::i64 : MVT::i32;
532 // First get the sign bit of second operand.
533 SDOperand Mask1 = (SrcVT == MVT::f64)
534 ? DAG.getConstantFP(BitsToDouble(1ULL << 63), SrcVT)
535 : DAG.getConstantFP(BitsToFloat(1U << 31), SrcVT);
536 Mask1 = DAG.getNode(ISD::BIT_CONVERT, SrcNVT, Mask1);
537 SDOperand SignBit= DAG.getNode(ISD::BIT_CONVERT, SrcNVT, Node->getOperand(1));
538 SignBit = DAG.getNode(ISD::AND, SrcNVT, SignBit, Mask1);
539 // Shift right or sign-extend it if the two operands have different types.
540 int SizeDiff = MVT::getSizeInBits(SrcNVT) - MVT::getSizeInBits(NVT);
542 SignBit = DAG.getNode(ISD::SRL, SrcNVT, SignBit,
543 DAG.getConstant(SizeDiff, TLI.getShiftAmountTy()));
544 SignBit = DAG.getNode(ISD::TRUNCATE, NVT, SignBit);
545 } else if (SizeDiff < 0)
546 SignBit = DAG.getNode(ISD::SIGN_EXTEND, NVT, SignBit);
548 // Clear the sign bit of first operand.
549 SDOperand Mask2 = (VT == MVT::f64)
550 ? DAG.getConstantFP(BitsToDouble(~(1ULL << 63)), VT)
551 : DAG.getConstantFP(BitsToFloat(~(1U << 31)), VT);
552 Mask2 = DAG.getNode(ISD::BIT_CONVERT, NVT, Mask2);
553 SDOperand Result = DAG.getNode(ISD::BIT_CONVERT, NVT, Node->getOperand(0));
554 Result = DAG.getNode(ISD::AND, NVT, Result, Mask2);
556 // Or the value with the sign bit.
557 Result = DAG.getNode(ISD::OR, NVT, Result, SignBit);
561 /// ExpandUnalignedStore - Expands an unaligned store to 2 half-size stores.
563 SDOperand ExpandUnalignedStore(StoreSDNode *ST, SelectionDAG &DAG,
564 TargetLowering &TLI) {
565 SDOperand Chain = ST->getChain();
566 SDOperand Ptr = ST->getBasePtr();
567 SDOperand Val = ST->getValue();
568 MVT::ValueType VT = Val.getValueType();
569 int Alignment = ST->getAlignment();
570 int SVOffset = ST->getSrcValueOffset();
571 if (MVT::isFloatingPoint(ST->getStoredVT())) {
572 // Expand to a bitconvert of the value to the integer type of the
573 // same size, then a (misaligned) int store.
574 MVT::ValueType intVT;
577 else if (VT==MVT::f32)
580 assert(0 && "Unaligned load of unsupported floating point type");
582 SDOperand Result = DAG.getNode(ISD::BIT_CONVERT, intVT, Val);
583 return DAG.getStore(Chain, Result, Ptr, ST->getSrcValue(),
584 SVOffset, ST->isVolatile(), Alignment);
586 assert(MVT::isInteger(ST->getStoredVT()) &&
587 "Unaligned store of unknown type.");
588 // Get the half-size VT
589 MVT::ValueType NewStoredVT = ST->getStoredVT() - 1;
590 int NumBits = MVT::getSizeInBits(NewStoredVT);
591 int IncrementSize = NumBits / 8;
593 // Divide the stored value in two parts.
594 SDOperand ShiftAmount = DAG.getConstant(NumBits, TLI.getShiftAmountTy());
596 SDOperand Hi = DAG.getNode(ISD::SRL, VT, Val, ShiftAmount);
598 // Store the two parts
599 SDOperand Store1, Store2;
600 Store1 = DAG.getTruncStore(Chain, TLI.isLittleEndian()?Lo:Hi, Ptr,
601 ST->getSrcValue(), SVOffset, NewStoredVT,
602 ST->isVolatile(), Alignment);
603 Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
604 DAG.getConstant(IncrementSize, TLI.getPointerTy()));
605 Store2 = DAG.getTruncStore(Chain, TLI.isLittleEndian()?Hi:Lo, Ptr,
606 ST->getSrcValue(), SVOffset + IncrementSize,
607 NewStoredVT, ST->isVolatile(), Alignment);
609 return DAG.getNode(ISD::TokenFactor, MVT::Other, Store1, Store2);
612 /// ExpandUnalignedLoad - Expands an unaligned load to 2 half-size loads.
614 SDOperand ExpandUnalignedLoad(LoadSDNode *LD, SelectionDAG &DAG,
615 TargetLowering &TLI) {
616 int SVOffset = LD->getSrcValueOffset();
617 SDOperand Chain = LD->getChain();
618 SDOperand Ptr = LD->getBasePtr();
619 MVT::ValueType VT = LD->getValueType(0);
620 MVT::ValueType LoadedVT = LD->getLoadedVT();
621 if (MVT::isFloatingPoint(VT)) {
622 // Expand to a (misaligned) integer load of the same size,
623 // then bitconvert to floating point.
624 MVT::ValueType intVT;
625 if (LoadedVT==MVT::f64)
627 else if (LoadedVT==MVT::f32)
630 assert(0 && "Unaligned load of unsupported floating point type");
632 SDOperand newLoad = DAG.getLoad(intVT, Chain, Ptr, LD->getSrcValue(),
633 SVOffset, LD->isVolatile(),
635 SDOperand Result = DAG.getNode(ISD::BIT_CONVERT, LoadedVT, newLoad);
637 Result = DAG.getNode(ISD::FP_EXTEND, VT, Result);
639 SDOperand Ops[] = { Result, Chain };
640 return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, MVT::Other),
643 assert(MVT::isInteger(LoadedVT) && "Unaligned load of unsupported type.");
644 MVT::ValueType NewLoadedVT = LoadedVT - 1;
645 int NumBits = MVT::getSizeInBits(NewLoadedVT);
646 int Alignment = LD->getAlignment();
647 int IncrementSize = NumBits / 8;
648 ISD::LoadExtType HiExtType = LD->getExtensionType();
650 // If the original load is NON_EXTLOAD, the hi part load must be ZEXTLOAD.
651 if (HiExtType == ISD::NON_EXTLOAD)
652 HiExtType = ISD::ZEXTLOAD;
654 // Load the value in two parts
656 if (TLI.isLittleEndian()) {
657 Lo = DAG.getExtLoad(ISD::ZEXTLOAD, VT, Chain, Ptr, LD->getSrcValue(),
658 SVOffset, NewLoadedVT, LD->isVolatile(), Alignment);
659 Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
660 DAG.getConstant(IncrementSize, TLI.getPointerTy()));
661 Hi = DAG.getExtLoad(HiExtType, VT, Chain, Ptr, LD->getSrcValue(),
662 SVOffset + IncrementSize, NewLoadedVT, LD->isVolatile(),
665 Hi = DAG.getExtLoad(HiExtType, VT, Chain, Ptr, LD->getSrcValue(), SVOffset,
666 NewLoadedVT,LD->isVolatile(), Alignment);
667 Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
668 DAG.getConstant(IncrementSize, TLI.getPointerTy()));
669 Lo = DAG.getExtLoad(ISD::ZEXTLOAD, VT, Chain, Ptr, LD->getSrcValue(),
670 SVOffset + IncrementSize, NewLoadedVT, LD->isVolatile(),
674 // aggregate the two parts
675 SDOperand ShiftAmount = DAG.getConstant(NumBits, TLI.getShiftAmountTy());
676 SDOperand Result = DAG.getNode(ISD::SHL, VT, Hi, ShiftAmount);
677 Result = DAG.getNode(ISD::OR, VT, Result, Lo);
679 SDOperand TF = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo.getValue(1),
682 SDOperand Ops[] = { Result, TF };
683 return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, MVT::Other), Ops, 2);
686 /// UnrollVectorOp - We know that the given vector has a legal type, however
687 /// the operation it performs is not legal and is an operation that we have
688 /// no way of lowering. "Unroll" the vector, splitting out the scalars and
689 /// operating on each element individually.
690 SDOperand SelectionDAGLegalize::UnrollVectorOp(SDOperand Op) {
691 MVT::ValueType VT = Op.getValueType();
692 assert(isTypeLegal(VT) &&
693 "Caller should expand or promote operands that are not legal!");
694 assert(Op.Val->getNumValues() == 1 &&
695 "Can't unroll a vector with multiple results!");
696 unsigned NE = MVT::getVectorNumElements(VT);
697 MVT::ValueType EltVT = MVT::getVectorElementType(VT);
699 SmallVector<SDOperand, 8> Scalars;
700 SmallVector<SDOperand, 4> Operands(Op.getNumOperands());
701 for (unsigned i = 0; i != NE; ++i) {
702 for (unsigned j = 0; j != Op.getNumOperands(); ++j) {
703 SDOperand Operand = Op.getOperand(j);
704 MVT::ValueType OperandVT = Operand.getValueType();
705 if (MVT::isVector(OperandVT)) {
706 // A vector operand; extract a single element.
707 MVT::ValueType OperandEltVT = MVT::getVectorElementType(OperandVT);
708 Operands[j] = DAG.getNode(ISD::EXTRACT_VECTOR_ELT,
711 DAG.getConstant(i, MVT::i32));
713 // A scalar operand; just use it as is.
714 Operands[j] = Operand;
717 Scalars.push_back(DAG.getNode(Op.getOpcode(), EltVT,
718 &Operands[0], Operands.size()));
721 return DAG.getNode(ISD::BUILD_VECTOR, VT, &Scalars[0], Scalars.size());
724 /// LegalizeOp - We know that the specified value has a legal type, and
725 /// that its operands are legal. Now ensure that the operation itself
726 /// is legal, recursively ensuring that the operands' operations remain
728 SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
729 if (Op.getOpcode() == ISD::TargetConstant) // Allow illegal target nodes.
732 assert(isTypeLegal(Op.getValueType()) &&
733 "Caller should expand or promote operands that are not legal!");
734 SDNode *Node = Op.Val;
736 // If this operation defines any values that cannot be represented in a
737 // register on this target, make sure to expand or promote them.
738 if (Node->getNumValues() > 1) {
739 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
740 if (getTypeAction(Node->getValueType(i)) != Legal) {
741 HandleOp(Op.getValue(i));
742 assert(LegalizedNodes.count(Op) &&
743 "Handling didn't add legal operands!");
744 return LegalizedNodes[Op];
748 // Note that LegalizeOp may be reentered even from single-use nodes, which
749 // means that we always must cache transformed nodes.
750 DenseMap<SDOperand, SDOperand>::iterator I = LegalizedNodes.find(Op);
751 if (I != LegalizedNodes.end()) return I->second;
753 SDOperand Tmp1, Tmp2, Tmp3, Tmp4;
754 SDOperand Result = Op;
755 bool isCustom = false;
757 switch (Node->getOpcode()) {
758 case ISD::FrameIndex:
759 case ISD::EntryToken:
761 case ISD::BasicBlock:
762 case ISD::TargetFrameIndex:
763 case ISD::TargetJumpTable:
764 case ISD::TargetConstant:
765 case ISD::TargetConstantFP:
766 case ISD::TargetConstantPool:
767 case ISD::TargetGlobalAddress:
768 case ISD::TargetGlobalTLSAddress:
769 case ISD::TargetExternalSymbol:
774 // Primitives must all be legal.
775 assert(TLI.isOperationLegal(Node->getOpcode(), Node->getValueType(0)) &&
776 "This must be legal!");
779 if (Node->getOpcode() >= ISD::BUILTIN_OP_END) {
780 // If this is a target node, legalize it by legalizing the operands then
781 // passing it through.
782 SmallVector<SDOperand, 8> Ops;
783 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i)
784 Ops.push_back(LegalizeOp(Node->getOperand(i)));
786 Result = DAG.UpdateNodeOperands(Result.getValue(0), &Ops[0], Ops.size());
788 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
789 AddLegalizedOperand(Op.getValue(i), Result.getValue(i));
790 return Result.getValue(Op.ResNo);
792 // Otherwise this is an unhandled builtin node. splat.
794 cerr << "NODE: "; Node->dump(&DAG); cerr << "\n";
796 assert(0 && "Do not know how to legalize this operator!");
798 case ISD::GLOBAL_OFFSET_TABLE:
799 case ISD::GlobalAddress:
800 case ISD::GlobalTLSAddress:
801 case ISD::ExternalSymbol:
802 case ISD::ConstantPool:
803 case ISD::JumpTable: // Nothing to do.
804 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
805 default: assert(0 && "This action is not supported yet!");
806 case TargetLowering::Custom:
807 Tmp1 = TLI.LowerOperation(Op, DAG);
808 if (Tmp1.Val) Result = Tmp1;
809 // FALLTHROUGH if the target doesn't want to lower this op after all.
810 case TargetLowering::Legal:
815 case ISD::RETURNADDR:
816 // The only option for these nodes is to custom lower them. If the target
817 // does not custom lower them, then return zero.
818 Tmp1 = TLI.LowerOperation(Op, DAG);
822 Result = DAG.getConstant(0, TLI.getPointerTy());
824 case ISD::FRAME_TO_ARGS_OFFSET: {
825 MVT::ValueType VT = Node->getValueType(0);
826 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
827 default: assert(0 && "This action is not supported yet!");
828 case TargetLowering::Custom:
829 Result = TLI.LowerOperation(Op, DAG);
830 if (Result.Val) break;
832 case TargetLowering::Legal:
833 Result = DAG.getConstant(0, VT);
838 case ISD::EXCEPTIONADDR: {
839 Tmp1 = LegalizeOp(Node->getOperand(0));
840 MVT::ValueType VT = Node->getValueType(0);
841 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
842 default: assert(0 && "This action is not supported yet!");
843 case TargetLowering::Expand: {
844 unsigned Reg = TLI.getExceptionAddressRegister();
845 Result = DAG.getCopyFromReg(Tmp1, Reg, VT).getValue(Op.ResNo);
848 case TargetLowering::Custom:
849 Result = TLI.LowerOperation(Op, DAG);
850 if (Result.Val) break;
852 case TargetLowering::Legal: {
853 SDOperand Ops[] = { DAG.getConstant(0, VT), Tmp1 };
854 Result = DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, MVT::Other),
855 Ops, 2).getValue(Op.ResNo);
861 case ISD::EHSELECTION: {
862 Tmp1 = LegalizeOp(Node->getOperand(0));
863 Tmp2 = LegalizeOp(Node->getOperand(1));
864 MVT::ValueType VT = Node->getValueType(0);
865 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
866 default: assert(0 && "This action is not supported yet!");
867 case TargetLowering::Expand: {
868 unsigned Reg = TLI.getExceptionSelectorRegister();
869 Result = DAG.getCopyFromReg(Tmp2, Reg, VT).getValue(Op.ResNo);
872 case TargetLowering::Custom:
873 Result = TLI.LowerOperation(Op, DAG);
874 if (Result.Val) break;
876 case TargetLowering::Legal: {
877 SDOperand Ops[] = { DAG.getConstant(0, VT), Tmp2 };
878 Result = DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, MVT::Other),
879 Ops, 2).getValue(Op.ResNo);
885 case ISD::EH_RETURN: {
886 MVT::ValueType VT = Node->getValueType(0);
887 // The only "good" option for this node is to custom lower it.
888 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
889 default: assert(0 && "This action is not supported at all!");
890 case TargetLowering::Custom:
891 Result = TLI.LowerOperation(Op, DAG);
892 if (Result.Val) break;
894 case TargetLowering::Legal:
895 // Target does not know, how to lower this, lower to noop
896 Result = LegalizeOp(Node->getOperand(0));
901 case ISD::AssertSext:
902 case ISD::AssertZext:
903 Tmp1 = LegalizeOp(Node->getOperand(0));
904 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
906 case ISD::MERGE_VALUES:
907 // Legalize eliminates MERGE_VALUES nodes.
908 Result = Node->getOperand(Op.ResNo);
910 case ISD::CopyFromReg:
911 Tmp1 = LegalizeOp(Node->getOperand(0));
912 Result = Op.getValue(0);
913 if (Node->getNumValues() == 2) {
914 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
916 assert(Node->getNumValues() == 3 && "Invalid copyfromreg!");
917 if (Node->getNumOperands() == 3) {
918 Tmp2 = LegalizeOp(Node->getOperand(2));
919 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1),Tmp2);
921 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
923 AddLegalizedOperand(Op.getValue(2), Result.getValue(2));
925 // Since CopyFromReg produces two values, make sure to remember that we
926 // legalized both of them.
927 AddLegalizedOperand(Op.getValue(0), Result);
928 AddLegalizedOperand(Op.getValue(1), Result.getValue(1));
929 return Result.getValue(Op.ResNo);
931 MVT::ValueType VT = Op.getValueType();
932 switch (TLI.getOperationAction(ISD::UNDEF, VT)) {
933 default: assert(0 && "This action is not supported yet!");
934 case TargetLowering::Expand:
935 if (MVT::isInteger(VT))
936 Result = DAG.getConstant(0, VT);
937 else if (MVT::isFloatingPoint(VT))
938 Result = DAG.getConstantFP(APFloat(APInt(MVT::getSizeInBits(VT), 0)),
941 assert(0 && "Unknown value type!");
943 case TargetLowering::Legal:
949 case ISD::INTRINSIC_W_CHAIN:
950 case ISD::INTRINSIC_WO_CHAIN:
951 case ISD::INTRINSIC_VOID: {
952 SmallVector<SDOperand, 8> Ops;
953 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i)
954 Ops.push_back(LegalizeOp(Node->getOperand(i)));
955 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
957 // Allow the target to custom lower its intrinsics if it wants to.
958 if (TLI.getOperationAction(Node->getOpcode(), MVT::Other) ==
959 TargetLowering::Custom) {
960 Tmp3 = TLI.LowerOperation(Result, DAG);
961 if (Tmp3.Val) Result = Tmp3;
964 if (Result.Val->getNumValues() == 1) break;
966 // Must have return value and chain result.
967 assert(Result.Val->getNumValues() == 2 &&
968 "Cannot return more than two values!");
970 // Since loads produce two values, make sure to remember that we
971 // legalized both of them.
972 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
973 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
974 return Result.getValue(Op.ResNo);
978 assert(Node->getNumOperands() == 5 && "Invalid LOCATION node!");
979 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the input chain.
981 switch (TLI.getOperationAction(ISD::LOCATION, MVT::Other)) {
982 case TargetLowering::Promote:
983 default: assert(0 && "This action is not supported yet!");
984 case TargetLowering::Expand: {
985 MachineModuleInfo *MMI = DAG.getMachineModuleInfo();
986 bool useDEBUG_LOC = TLI.isOperationLegal(ISD::DEBUG_LOC, MVT::Other);
987 bool useLABEL = TLI.isOperationLegal(ISD::LABEL, MVT::Other);
989 if (MMI && (useDEBUG_LOC || useLABEL)) {
990 const std::string &FName =
991 cast<StringSDNode>(Node->getOperand(3))->getValue();
992 const std::string &DirName =
993 cast<StringSDNode>(Node->getOperand(4))->getValue();
994 unsigned SrcFile = MMI->RecordSource(DirName, FName);
996 SmallVector<SDOperand, 8> Ops;
997 Ops.push_back(Tmp1); // chain
998 SDOperand LineOp = Node->getOperand(1);
999 SDOperand ColOp = Node->getOperand(2);
1002 Ops.push_back(LineOp); // line #
1003 Ops.push_back(ColOp); // col #
1004 Ops.push_back(DAG.getConstant(SrcFile, MVT::i32)); // source file id
1005 Result = DAG.getNode(ISD::DEBUG_LOC, MVT::Other, &Ops[0], Ops.size());
1007 unsigned Line = cast<ConstantSDNode>(LineOp)->getValue();
1008 unsigned Col = cast<ConstantSDNode>(ColOp)->getValue();
1009 unsigned ID = MMI->RecordLabel(Line, Col, SrcFile);
1010 Ops.push_back(DAG.getConstant(ID, MVT::i32));
1011 Result = DAG.getNode(ISD::LABEL, MVT::Other,&Ops[0],Ops.size());
1014 Result = Tmp1; // chain
1018 case TargetLowering::Legal:
1019 if (Tmp1 != Node->getOperand(0) ||
1020 getTypeAction(Node->getOperand(1).getValueType()) == Promote) {
1021 SmallVector<SDOperand, 8> Ops;
1022 Ops.push_back(Tmp1);
1023 if (getTypeAction(Node->getOperand(1).getValueType()) == Legal) {
1024 Ops.push_back(Node->getOperand(1)); // line # must be legal.
1025 Ops.push_back(Node->getOperand(2)); // col # must be legal.
1027 // Otherwise promote them.
1028 Ops.push_back(PromoteOp(Node->getOperand(1)));
1029 Ops.push_back(PromoteOp(Node->getOperand(2)));
1031 Ops.push_back(Node->getOperand(3)); // filename must be legal.
1032 Ops.push_back(Node->getOperand(4)); // working dir # must be legal.
1033 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1039 case ISD::DEBUG_LOC:
1040 assert(Node->getNumOperands() == 4 && "Invalid DEBUG_LOC node!");
1041 switch (TLI.getOperationAction(ISD::DEBUG_LOC, MVT::Other)) {
1042 default: assert(0 && "This action is not supported yet!");
1043 case TargetLowering::Legal:
1044 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1045 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the line #.
1046 Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the col #.
1047 Tmp4 = LegalizeOp(Node->getOperand(3)); // Legalize the source file id.
1048 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3, Tmp4);
1054 assert(Node->getNumOperands() == 2 && "Invalid LABEL node!");
1055 switch (TLI.getOperationAction(ISD::LABEL, MVT::Other)) {
1056 default: assert(0 && "This action is not supported yet!");
1057 case TargetLowering::Legal:
1058 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1059 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the label id.
1060 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1062 case TargetLowering::Expand:
1063 Result = LegalizeOp(Node->getOperand(0));
1068 case ISD::Constant: {
1069 ConstantSDNode *CN = cast<ConstantSDNode>(Node);
1071 TLI.getOperationAction(ISD::Constant, CN->getValueType(0));
1073 // We know we don't need to expand constants here, constants only have one
1074 // value and we check that it is fine above.
1076 if (opAction == TargetLowering::Custom) {
1077 Tmp1 = TLI.LowerOperation(Result, DAG);
1083 case ISD::ConstantFP: {
1084 // Spill FP immediates to the constant pool if the target cannot directly
1085 // codegen them. Targets often have some immediate values that can be
1086 // efficiently generated into an FP register without a load. We explicitly
1087 // leave these constants as ConstantFP nodes for the target to deal with.
1088 ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Node);
1090 // Check to see if this FP immediate is already legal.
1091 bool isLegal = false;
1092 for (TargetLowering::legal_fpimm_iterator I = TLI.legal_fpimm_begin(),
1093 E = TLI.legal_fpimm_end(); I != E; ++I)
1094 if (CFP->isExactlyValue(*I)) {
1099 // If this is a legal constant, turn it into a TargetConstantFP node.
1101 Result = DAG.getTargetConstantFP(CFP->getValueAPF(),
1102 CFP->getValueType(0));
1106 switch (TLI.getOperationAction(ISD::ConstantFP, CFP->getValueType(0))) {
1107 default: assert(0 && "This action is not supported yet!");
1108 case TargetLowering::Custom:
1109 Tmp3 = TLI.LowerOperation(Result, DAG);
1115 case TargetLowering::Expand:
1116 Result = ExpandConstantFP(CFP, true, DAG, TLI);
1120 case ISD::TokenFactor:
1121 if (Node->getNumOperands() == 2) {
1122 Tmp1 = LegalizeOp(Node->getOperand(0));
1123 Tmp2 = LegalizeOp(Node->getOperand(1));
1124 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1125 } else if (Node->getNumOperands() == 3) {
1126 Tmp1 = LegalizeOp(Node->getOperand(0));
1127 Tmp2 = LegalizeOp(Node->getOperand(1));
1128 Tmp3 = LegalizeOp(Node->getOperand(2));
1129 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1131 SmallVector<SDOperand, 8> Ops;
1132 // Legalize the operands.
1133 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i)
1134 Ops.push_back(LegalizeOp(Node->getOperand(i)));
1135 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1139 case ISD::FORMAL_ARGUMENTS:
1141 // The only option for this is to custom lower it.
1142 Tmp3 = TLI.LowerOperation(Result.getValue(0), DAG);
1143 assert(Tmp3.Val && "Target didn't custom lower this node!");
1144 assert(Tmp3.Val->getNumValues() == Result.Val->getNumValues() &&
1145 "Lowering call/formal_arguments produced unexpected # results!");
1147 // Since CALL/FORMAL_ARGUMENTS nodes produce multiple values, make sure to
1148 // remember that we legalized all of them, so it doesn't get relegalized.
1149 for (unsigned i = 0, e = Tmp3.Val->getNumValues(); i != e; ++i) {
1150 Tmp1 = LegalizeOp(Tmp3.getValue(i));
1153 AddLegalizedOperand(SDOperand(Node, i), Tmp1);
1156 case ISD::EXTRACT_SUBREG: {
1157 Tmp1 = LegalizeOp(Node->getOperand(0));
1158 ConstantSDNode *idx = dyn_cast<ConstantSDNode>(Node->getOperand(1));
1159 assert(idx && "Operand must be a constant");
1160 Tmp2 = DAG.getTargetConstant(idx->getValue(), idx->getValueType(0));
1161 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1164 case ISD::INSERT_SUBREG: {
1165 Tmp1 = LegalizeOp(Node->getOperand(0));
1166 Tmp2 = LegalizeOp(Node->getOperand(1));
1167 ConstantSDNode *idx = dyn_cast<ConstantSDNode>(Node->getOperand(2));
1168 assert(idx && "Operand must be a constant");
1169 Tmp3 = DAG.getTargetConstant(idx->getValue(), idx->getValueType(0));
1170 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1173 case ISD::BUILD_VECTOR:
1174 switch (TLI.getOperationAction(ISD::BUILD_VECTOR, Node->getValueType(0))) {
1175 default: assert(0 && "This action is not supported yet!");
1176 case TargetLowering::Custom:
1177 Tmp3 = TLI.LowerOperation(Result, DAG);
1183 case TargetLowering::Expand:
1184 Result = ExpandBUILD_VECTOR(Result.Val);
1188 case ISD::INSERT_VECTOR_ELT:
1189 Tmp1 = LegalizeOp(Node->getOperand(0)); // InVec
1190 Tmp2 = LegalizeOp(Node->getOperand(1)); // InVal
1191 Tmp3 = LegalizeOp(Node->getOperand(2)); // InEltNo
1192 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1194 switch (TLI.getOperationAction(ISD::INSERT_VECTOR_ELT,
1195 Node->getValueType(0))) {
1196 default: assert(0 && "This action is not supported yet!");
1197 case TargetLowering::Legal:
1199 case TargetLowering::Custom:
1200 Tmp3 = TLI.LowerOperation(Result, DAG);
1206 case TargetLowering::Expand: {
1207 // If the insert index is a constant, codegen this as a scalar_to_vector,
1208 // then a shuffle that inserts it into the right position in the vector.
1209 if (ConstantSDNode *InsertPos = dyn_cast<ConstantSDNode>(Tmp3)) {
1210 SDOperand ScVec = DAG.getNode(ISD::SCALAR_TO_VECTOR,
1211 Tmp1.getValueType(), Tmp2);
1213 unsigned NumElts = MVT::getVectorNumElements(Tmp1.getValueType());
1214 MVT::ValueType ShufMaskVT = MVT::getIntVectorWithNumElements(NumElts);
1215 MVT::ValueType ShufMaskEltVT = MVT::getVectorElementType(ShufMaskVT);
1217 // We generate a shuffle of InVec and ScVec, so the shuffle mask should
1218 // be 0,1,2,3,4,5... with the appropriate element replaced with elt 0 of
1220 SmallVector<SDOperand, 8> ShufOps;
1221 for (unsigned i = 0; i != NumElts; ++i) {
1222 if (i != InsertPos->getValue())
1223 ShufOps.push_back(DAG.getConstant(i, ShufMaskEltVT));
1225 ShufOps.push_back(DAG.getConstant(NumElts, ShufMaskEltVT));
1227 SDOperand ShufMask = DAG.getNode(ISD::BUILD_VECTOR, ShufMaskVT,
1228 &ShufOps[0], ShufOps.size());
1230 Result = DAG.getNode(ISD::VECTOR_SHUFFLE, Tmp1.getValueType(),
1231 Tmp1, ScVec, ShufMask);
1232 Result = LegalizeOp(Result);
1236 // If the target doesn't support this, we have to spill the input vector
1237 // to a temporary stack slot, update the element, then reload it. This is
1238 // badness. We could also load the value into a vector register (either
1239 // with a "move to register" or "extload into register" instruction, then
1240 // permute it into place, if the idx is a constant and if the idx is
1241 // supported by the target.
1242 MVT::ValueType VT = Tmp1.getValueType();
1243 MVT::ValueType EltVT = Tmp2.getValueType();
1244 MVT::ValueType IdxVT = Tmp3.getValueType();
1245 MVT::ValueType PtrVT = TLI.getPointerTy();
1246 SDOperand StackPtr = DAG.CreateStackTemporary(VT);
1247 // Store the vector.
1248 SDOperand Ch = DAG.getStore(DAG.getEntryNode(), Tmp1, StackPtr, NULL, 0);
1250 // Truncate or zero extend offset to target pointer type.
1251 unsigned CastOpc = (IdxVT > PtrVT) ? ISD::TRUNCATE : ISD::ZERO_EXTEND;
1252 Tmp3 = DAG.getNode(CastOpc, PtrVT, Tmp3);
1253 // Add the offset to the index.
1254 unsigned EltSize = MVT::getSizeInBits(EltVT)/8;
1255 Tmp3 = DAG.getNode(ISD::MUL, IdxVT, Tmp3,DAG.getConstant(EltSize, IdxVT));
1256 SDOperand StackPtr2 = DAG.getNode(ISD::ADD, IdxVT, Tmp3, StackPtr);
1257 // Store the scalar value.
1258 Ch = DAG.getStore(Ch, Tmp2, StackPtr2, NULL, 0);
1259 // Load the updated vector.
1260 Result = DAG.getLoad(VT, Ch, StackPtr, NULL, 0);
1265 case ISD::SCALAR_TO_VECTOR:
1266 if (!TLI.isTypeLegal(Node->getOperand(0).getValueType())) {
1267 Result = LegalizeOp(ExpandSCALAR_TO_VECTOR(Node));
1271 Tmp1 = LegalizeOp(Node->getOperand(0)); // InVal
1272 Result = DAG.UpdateNodeOperands(Result, Tmp1);
1273 switch (TLI.getOperationAction(ISD::SCALAR_TO_VECTOR,
1274 Node->getValueType(0))) {
1275 default: assert(0 && "This action is not supported yet!");
1276 case TargetLowering::Legal:
1278 case TargetLowering::Custom:
1279 Tmp3 = TLI.LowerOperation(Result, DAG);
1285 case TargetLowering::Expand:
1286 Result = LegalizeOp(ExpandSCALAR_TO_VECTOR(Node));
1290 case ISD::VECTOR_SHUFFLE:
1291 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the input vectors,
1292 Tmp2 = LegalizeOp(Node->getOperand(1)); // but not the shuffle mask.
1293 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
1295 // Allow targets to custom lower the SHUFFLEs they support.
1296 switch (TLI.getOperationAction(ISD::VECTOR_SHUFFLE,Result.getValueType())) {
1297 default: assert(0 && "Unknown operation action!");
1298 case TargetLowering::Legal:
1299 assert(isShuffleLegal(Result.getValueType(), Node->getOperand(2)) &&
1300 "vector shuffle should not be created if not legal!");
1302 case TargetLowering::Custom:
1303 Tmp3 = TLI.LowerOperation(Result, DAG);
1309 case TargetLowering::Expand: {
1310 MVT::ValueType VT = Node->getValueType(0);
1311 MVT::ValueType EltVT = MVT::getVectorElementType(VT);
1312 MVT::ValueType PtrVT = TLI.getPointerTy();
1313 SDOperand Mask = Node->getOperand(2);
1314 unsigned NumElems = Mask.getNumOperands();
1315 SmallVector<SDOperand,8> Ops;
1316 for (unsigned i = 0; i != NumElems; ++i) {
1317 SDOperand Arg = Mask.getOperand(i);
1318 if (Arg.getOpcode() == ISD::UNDEF) {
1319 Ops.push_back(DAG.getNode(ISD::UNDEF, EltVT));
1321 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1322 unsigned Idx = cast<ConstantSDNode>(Arg)->getValue();
1324 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, EltVT, Tmp1,
1325 DAG.getConstant(Idx, PtrVT)));
1327 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, EltVT, Tmp2,
1328 DAG.getConstant(Idx - NumElems, PtrVT)));
1331 Result = DAG.getNode(ISD::BUILD_VECTOR, VT, &Ops[0], Ops.size());
1334 case TargetLowering::Promote: {
1335 // Change base type to a different vector type.
1336 MVT::ValueType OVT = Node->getValueType(0);
1337 MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
1339 // Cast the two input vectors.
1340 Tmp1 = DAG.getNode(ISD::BIT_CONVERT, NVT, Tmp1);
1341 Tmp2 = DAG.getNode(ISD::BIT_CONVERT, NVT, Tmp2);
1343 // Convert the shuffle mask to the right # elements.
1344 Tmp3 = SDOperand(isShuffleLegal(OVT, Node->getOperand(2)), 0);
1345 assert(Tmp3.Val && "Shuffle not legal?");
1346 Result = DAG.getNode(ISD::VECTOR_SHUFFLE, NVT, Tmp1, Tmp2, Tmp3);
1347 Result = DAG.getNode(ISD::BIT_CONVERT, OVT, Result);
1353 case ISD::EXTRACT_VECTOR_ELT:
1354 Tmp1 = Node->getOperand(0);
1355 Tmp2 = LegalizeOp(Node->getOperand(1));
1356 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1357 Result = ExpandEXTRACT_VECTOR_ELT(Result);
1360 case ISD::EXTRACT_SUBVECTOR:
1361 Tmp1 = Node->getOperand(0);
1362 Tmp2 = LegalizeOp(Node->getOperand(1));
1363 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1364 Result = ExpandEXTRACT_SUBVECTOR(Result);
1367 case ISD::CALLSEQ_START: {
1368 SDNode *CallEnd = FindCallEndFromCallStart(Node);
1370 // Recursively Legalize all of the inputs of the call end that do not lead
1371 // to this call start. This ensures that any libcalls that need be inserted
1372 // are inserted *before* the CALLSEQ_START.
1373 {SmallPtrSet<SDNode*, 32> NodesLeadingTo;
1374 for (unsigned i = 0, e = CallEnd->getNumOperands(); i != e; ++i)
1375 LegalizeAllNodesNotLeadingTo(CallEnd->getOperand(i).Val, Node,
1379 // Now that we legalized all of the inputs (which may have inserted
1380 // libcalls) create the new CALLSEQ_START node.
1381 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1383 // Merge in the last call, to ensure that this call start after the last
1385 if (LastCALLSEQ_END.getOpcode() != ISD::EntryToken) {
1386 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1387 Tmp1 = LegalizeOp(Tmp1);
1390 // Do not try to legalize the target-specific arguments (#1+).
1391 if (Tmp1 != Node->getOperand(0)) {
1392 SmallVector<SDOperand, 8> Ops(Node->op_begin(), Node->op_end());
1394 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1397 // Remember that the CALLSEQ_START is legalized.
1398 AddLegalizedOperand(Op.getValue(0), Result);
1399 if (Node->getNumValues() == 2) // If this has a flag result, remember it.
1400 AddLegalizedOperand(Op.getValue(1), Result.getValue(1));
1402 // Now that the callseq_start and all of the non-call nodes above this call
1403 // sequence have been legalized, legalize the call itself. During this
1404 // process, no libcalls can/will be inserted, guaranteeing that no calls
1406 assert(!IsLegalizingCall && "Inconsistent sequentialization of calls!");
1407 SDOperand InCallSEQ = LastCALLSEQ_END;
1408 // Note that we are selecting this call!
1409 LastCALLSEQ_END = SDOperand(CallEnd, 0);
1410 IsLegalizingCall = true;
1412 // Legalize the call, starting from the CALLSEQ_END.
1413 LegalizeOp(LastCALLSEQ_END);
1414 assert(!IsLegalizingCall && "CALLSEQ_END should have cleared this!");
1417 case ISD::CALLSEQ_END:
1418 // If the CALLSEQ_START node hasn't been legalized first, legalize it. This
1419 // will cause this node to be legalized as well as handling libcalls right.
1420 if (LastCALLSEQ_END.Val != Node) {
1421 LegalizeOp(SDOperand(FindCallStartFromCallEnd(Node), 0));
1422 DenseMap<SDOperand, SDOperand>::iterator I = LegalizedNodes.find(Op);
1423 assert(I != LegalizedNodes.end() &&
1424 "Legalizing the call start should have legalized this node!");
1428 // Otherwise, the call start has been legalized and everything is going
1429 // according to plan. Just legalize ourselves normally here.
1430 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1431 // Do not try to legalize the target-specific arguments (#1+), except for
1432 // an optional flag input.
1433 if (Node->getOperand(Node->getNumOperands()-1).getValueType() != MVT::Flag){
1434 if (Tmp1 != Node->getOperand(0)) {
1435 SmallVector<SDOperand, 8> Ops(Node->op_begin(), Node->op_end());
1437 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1440 Tmp2 = LegalizeOp(Node->getOperand(Node->getNumOperands()-1));
1441 if (Tmp1 != Node->getOperand(0) ||
1442 Tmp2 != Node->getOperand(Node->getNumOperands()-1)) {
1443 SmallVector<SDOperand, 8> Ops(Node->op_begin(), Node->op_end());
1446 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1449 assert(IsLegalizingCall && "Call sequence imbalance between start/end?");
1450 // This finishes up call legalization.
1451 IsLegalizingCall = false;
1453 // If the CALLSEQ_END node has a flag, remember that we legalized it.
1454 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
1455 if (Node->getNumValues() == 2)
1456 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
1457 return Result.getValue(Op.ResNo);
1458 case ISD::DYNAMIC_STACKALLOC: {
1459 MVT::ValueType VT = Node->getValueType(0);
1460 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1461 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the size.
1462 Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the alignment.
1463 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1465 Tmp1 = Result.getValue(0);
1466 Tmp2 = Result.getValue(1);
1467 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
1468 default: assert(0 && "This action is not supported yet!");
1469 case TargetLowering::Expand: {
1470 unsigned SPReg = TLI.getStackPointerRegisterToSaveRestore();
1471 assert(SPReg && "Target cannot require DYNAMIC_STACKALLOC expansion and"
1472 " not tell us which reg is the stack pointer!");
1473 SDOperand Chain = Tmp1.getOperand(0);
1474 SDOperand Size = Tmp2.getOperand(1);
1475 SDOperand SP = DAG.getCopyFromReg(Chain, SPReg, VT);
1476 Chain = SP.getValue(1);
1477 unsigned Align = cast<ConstantSDNode>(Tmp3)->getValue();
1478 unsigned StackAlign =
1479 TLI.getTargetMachine().getFrameInfo()->getStackAlignment();
1480 if (Align > StackAlign)
1481 SP = DAG.getNode(ISD::AND, VT, SP,
1482 DAG.getConstant(-(uint64_t)Align, VT));
1483 Tmp1 = DAG.getNode(ISD::SUB, VT, SP, Size); // Value
1484 Tmp2 = DAG.getCopyToReg(Chain, SPReg, Tmp1); // Output chain
1485 Tmp1 = LegalizeOp(Tmp1);
1486 Tmp2 = LegalizeOp(Tmp2);
1489 case TargetLowering::Custom:
1490 Tmp3 = TLI.LowerOperation(Tmp1, DAG);
1492 Tmp1 = LegalizeOp(Tmp3);
1493 Tmp2 = LegalizeOp(Tmp3.getValue(1));
1496 case TargetLowering::Legal:
1499 // Since this op produce two values, make sure to remember that we
1500 // legalized both of them.
1501 AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
1502 AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
1503 return Op.ResNo ? Tmp2 : Tmp1;
1505 case ISD::INLINEASM: {
1506 SmallVector<SDOperand, 8> Ops(Node->op_begin(), Node->op_end());
1507 bool Changed = false;
1508 // Legalize all of the operands of the inline asm, in case they are nodes
1509 // that need to be expanded or something. Note we skip the asm string and
1510 // all of the TargetConstant flags.
1511 SDOperand Op = LegalizeOp(Ops[0]);
1512 Changed = Op != Ops[0];
1515 bool HasInFlag = Ops.back().getValueType() == MVT::Flag;
1516 for (unsigned i = 2, e = Ops.size()-HasInFlag; i < e; ) {
1517 unsigned NumVals = cast<ConstantSDNode>(Ops[i])->getValue() >> 3;
1518 for (++i; NumVals; ++i, --NumVals) {
1519 SDOperand Op = LegalizeOp(Ops[i]);
1528 Op = LegalizeOp(Ops.back());
1529 Changed |= Op != Ops.back();
1534 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1536 // INLINE asm returns a chain and flag, make sure to add both to the map.
1537 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
1538 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
1539 return Result.getValue(Op.ResNo);
1542 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1543 // Ensure that libcalls are emitted before a branch.
1544 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1545 Tmp1 = LegalizeOp(Tmp1);
1546 LastCALLSEQ_END = DAG.getEntryNode();
1548 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
1551 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1552 // Ensure that libcalls are emitted before a branch.
1553 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1554 Tmp1 = LegalizeOp(Tmp1);
1555 LastCALLSEQ_END = DAG.getEntryNode();
1557 switch (getTypeAction(Node->getOperand(1).getValueType())) {
1558 default: assert(0 && "Indirect target must be legal type (pointer)!");
1560 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the condition.
1563 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1566 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1567 // Ensure that libcalls are emitted before a branch.
1568 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1569 Tmp1 = LegalizeOp(Tmp1);
1570 LastCALLSEQ_END = DAG.getEntryNode();
1572 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the jumptable node.
1573 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
1575 switch (TLI.getOperationAction(ISD::BR_JT, MVT::Other)) {
1576 default: assert(0 && "This action is not supported yet!");
1577 case TargetLowering::Legal: break;
1578 case TargetLowering::Custom:
1579 Tmp1 = TLI.LowerOperation(Result, DAG);
1580 if (Tmp1.Val) Result = Tmp1;
1582 case TargetLowering::Expand: {
1583 SDOperand Chain = Result.getOperand(0);
1584 SDOperand Table = Result.getOperand(1);
1585 SDOperand Index = Result.getOperand(2);
1587 MVT::ValueType PTy = TLI.getPointerTy();
1588 MachineFunction &MF = DAG.getMachineFunction();
1589 unsigned EntrySize = MF.getJumpTableInfo()->getEntrySize();
1590 Index= DAG.getNode(ISD::MUL, PTy, Index, DAG.getConstant(EntrySize, PTy));
1591 SDOperand Addr = DAG.getNode(ISD::ADD, PTy, Index, Table);
1594 switch (EntrySize) {
1595 default: assert(0 && "Size of jump table not supported yet."); break;
1596 case 4: LD = DAG.getLoad(MVT::i32, Chain, Addr, NULL, 0); break;
1597 case 8: LD = DAG.getLoad(MVT::i64, Chain, Addr, NULL, 0); break;
1600 if (TLI.getTargetMachine().getRelocationModel() == Reloc::PIC_) {
1601 // For PIC, the sequence is:
1602 // BRIND(load(Jumptable + index) + RelocBase)
1603 // RelocBase is the JumpTable on PPC and X86, GOT on Alpha
1605 if (TLI.usesGlobalOffsetTable())
1606 Reloc = DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, PTy);
1609 Addr = (PTy != MVT::i32) ? DAG.getNode(ISD::SIGN_EXTEND, PTy, LD) : LD;
1610 Addr = DAG.getNode(ISD::ADD, PTy, Addr, Reloc);
1611 Result = DAG.getNode(ISD::BRIND, MVT::Other, LD.getValue(1), Addr);
1613 Result = DAG.getNode(ISD::BRIND, MVT::Other, LD.getValue(1), LD);
1619 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1620 // Ensure that libcalls are emitted before a return.
1621 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1622 Tmp1 = LegalizeOp(Tmp1);
1623 LastCALLSEQ_END = DAG.getEntryNode();
1625 switch (getTypeAction(Node->getOperand(1).getValueType())) {
1626 case Expand: assert(0 && "It's impossible to expand bools");
1628 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the condition.
1631 Tmp2 = PromoteOp(Node->getOperand(1)); // Promote the condition.
1633 // The top bits of the promoted condition are not necessarily zero, ensure
1634 // that the value is properly zero extended.
1635 if (!DAG.MaskedValueIsZero(Tmp2,
1636 MVT::getIntVTBitMask(Tmp2.getValueType())^1))
1637 Tmp2 = DAG.getZeroExtendInReg(Tmp2, MVT::i1);
1641 // Basic block destination (Op#2) is always legal.
1642 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
1644 switch (TLI.getOperationAction(ISD::BRCOND, MVT::Other)) {
1645 default: assert(0 && "This action is not supported yet!");
1646 case TargetLowering::Legal: break;
1647 case TargetLowering::Custom:
1648 Tmp1 = TLI.LowerOperation(Result, DAG);
1649 if (Tmp1.Val) Result = Tmp1;
1651 case TargetLowering::Expand:
1652 // Expand brcond's setcc into its constituent parts and create a BR_CC
1654 if (Tmp2.getOpcode() == ISD::SETCC) {
1655 Result = DAG.getNode(ISD::BR_CC, MVT::Other, Tmp1, Tmp2.getOperand(2),
1656 Tmp2.getOperand(0), Tmp2.getOperand(1),
1657 Node->getOperand(2));
1659 Result = DAG.getNode(ISD::BR_CC, MVT::Other, Tmp1,
1660 DAG.getCondCode(ISD::SETNE), Tmp2,
1661 DAG.getConstant(0, Tmp2.getValueType()),
1662 Node->getOperand(2));
1668 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1669 // Ensure that libcalls are emitted before a branch.
1670 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1671 Tmp1 = LegalizeOp(Tmp1);
1672 Tmp2 = Node->getOperand(2); // LHS
1673 Tmp3 = Node->getOperand(3); // RHS
1674 Tmp4 = Node->getOperand(1); // CC
1676 LegalizeSetCCOperands(Tmp2, Tmp3, Tmp4);
1677 LastCALLSEQ_END = DAG.getEntryNode();
1679 // If we didn't get both a LHS and RHS back from LegalizeSetCCOperands,
1680 // the LHS is a legal SETCC itself. In this case, we need to compare
1681 // the result against zero to select between true and false values.
1682 if (Tmp3.Val == 0) {
1683 Tmp3 = DAG.getConstant(0, Tmp2.getValueType());
1684 Tmp4 = DAG.getCondCode(ISD::SETNE);
1687 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp4, Tmp2, Tmp3,
1688 Node->getOperand(4));
1690 switch (TLI.getOperationAction(ISD::BR_CC, Tmp3.getValueType())) {
1691 default: assert(0 && "Unexpected action for BR_CC!");
1692 case TargetLowering::Legal: break;
1693 case TargetLowering::Custom:
1694 Tmp4 = TLI.LowerOperation(Result, DAG);
1695 if (Tmp4.Val) Result = Tmp4;
1700 LoadSDNode *LD = cast<LoadSDNode>(Node);
1701 Tmp1 = LegalizeOp(LD->getChain()); // Legalize the chain.
1702 Tmp2 = LegalizeOp(LD->getBasePtr()); // Legalize the base pointer.
1704 ISD::LoadExtType ExtType = LD->getExtensionType();
1705 if (ExtType == ISD::NON_EXTLOAD) {
1706 MVT::ValueType VT = Node->getValueType(0);
1707 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, LD->getOffset());
1708 Tmp3 = Result.getValue(0);
1709 Tmp4 = Result.getValue(1);
1711 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
1712 default: assert(0 && "This action is not supported yet!");
1713 case TargetLowering::Legal:
1714 // If this is an unaligned load and the target doesn't support it,
1716 if (!TLI.allowsUnalignedMemoryAccesses()) {
1717 unsigned ABIAlignment = TLI.getTargetData()->
1718 getABITypeAlignment(MVT::getTypeForValueType(LD->getLoadedVT()));
1719 if (LD->getAlignment() < ABIAlignment){
1720 Result = ExpandUnalignedLoad(cast<LoadSDNode>(Result.Val), DAG,
1722 Tmp3 = Result.getOperand(0);
1723 Tmp4 = Result.getOperand(1);
1724 Tmp3 = LegalizeOp(Tmp3);
1725 Tmp4 = LegalizeOp(Tmp4);
1729 case TargetLowering::Custom:
1730 Tmp1 = TLI.LowerOperation(Tmp3, DAG);
1732 Tmp3 = LegalizeOp(Tmp1);
1733 Tmp4 = LegalizeOp(Tmp1.getValue(1));
1736 case TargetLowering::Promote: {
1737 // Only promote a load of vector type to another.
1738 assert(MVT::isVector(VT) && "Cannot promote this load!");
1739 // Change base type to a different vector type.
1740 MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), VT);
1742 Tmp1 = DAG.getLoad(NVT, Tmp1, Tmp2, LD->getSrcValue(),
1743 LD->getSrcValueOffset(),
1744 LD->isVolatile(), LD->getAlignment());
1745 Tmp3 = LegalizeOp(DAG.getNode(ISD::BIT_CONVERT, VT, Tmp1));
1746 Tmp4 = LegalizeOp(Tmp1.getValue(1));
1750 // Since loads produce two values, make sure to remember that we
1751 // legalized both of them.
1752 AddLegalizedOperand(SDOperand(Node, 0), Tmp3);
1753 AddLegalizedOperand(SDOperand(Node, 1), Tmp4);
1754 return Op.ResNo ? Tmp4 : Tmp3;
1756 MVT::ValueType SrcVT = LD->getLoadedVT();
1757 switch (TLI.getLoadXAction(ExtType, SrcVT)) {
1758 default: assert(0 && "This action is not supported yet!");
1759 case TargetLowering::Promote:
1760 assert(SrcVT == MVT::i1 &&
1761 "Can only promote extending LOAD from i1 -> i8!");
1762 Result = DAG.getExtLoad(ExtType, Node->getValueType(0), Tmp1, Tmp2,
1763 LD->getSrcValue(), LD->getSrcValueOffset(),
1764 MVT::i8, LD->isVolatile(), LD->getAlignment());
1765 Tmp1 = Result.getValue(0);
1766 Tmp2 = Result.getValue(1);
1768 case TargetLowering::Custom:
1771 case TargetLowering::Legal:
1772 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, LD->getOffset());
1773 Tmp1 = Result.getValue(0);
1774 Tmp2 = Result.getValue(1);
1777 Tmp3 = TLI.LowerOperation(Result, DAG);
1779 Tmp1 = LegalizeOp(Tmp3);
1780 Tmp2 = LegalizeOp(Tmp3.getValue(1));
1783 // If this is an unaligned load and the target doesn't support it,
1785 if (!TLI.allowsUnalignedMemoryAccesses()) {
1786 unsigned ABIAlignment = TLI.getTargetData()->
1787 getABITypeAlignment(MVT::getTypeForValueType(LD->getLoadedVT()));
1788 if (LD->getAlignment() < ABIAlignment){
1789 Result = ExpandUnalignedLoad(cast<LoadSDNode>(Result.Val), DAG,
1791 Tmp1 = Result.getOperand(0);
1792 Tmp2 = Result.getOperand(1);
1793 Tmp1 = LegalizeOp(Tmp1);
1794 Tmp2 = LegalizeOp(Tmp2);
1799 case TargetLowering::Expand:
1800 // f64 = EXTLOAD f32 should expand to LOAD, FP_EXTEND
1801 if (SrcVT == MVT::f32 && Node->getValueType(0) == MVT::f64) {
1802 SDOperand Load = DAG.getLoad(SrcVT, Tmp1, Tmp2, LD->getSrcValue(),
1803 LD->getSrcValueOffset(),
1804 LD->isVolatile(), LD->getAlignment());
1805 Result = DAG.getNode(ISD::FP_EXTEND, Node->getValueType(0), Load);
1806 Tmp1 = LegalizeOp(Result); // Relegalize new nodes.
1807 Tmp2 = LegalizeOp(Load.getValue(1));
1810 assert(ExtType != ISD::EXTLOAD &&"EXTLOAD should always be supported!");
1811 // Turn the unsupported load into an EXTLOAD followed by an explicit
1812 // zero/sign extend inreg.
1813 Result = DAG.getExtLoad(ISD::EXTLOAD, Node->getValueType(0),
1814 Tmp1, Tmp2, LD->getSrcValue(),
1815 LD->getSrcValueOffset(), SrcVT,
1816 LD->isVolatile(), LD->getAlignment());
1818 if (ExtType == ISD::SEXTLOAD)
1819 ValRes = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
1820 Result, DAG.getValueType(SrcVT));
1822 ValRes = DAG.getZeroExtendInReg(Result, SrcVT);
1823 Tmp1 = LegalizeOp(ValRes); // Relegalize new nodes.
1824 Tmp2 = LegalizeOp(Result.getValue(1)); // Relegalize new nodes.
1827 // Since loads produce two values, make sure to remember that we legalized
1829 AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
1830 AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
1831 return Op.ResNo ? Tmp2 : Tmp1;
1834 case ISD::EXTRACT_ELEMENT: {
1835 MVT::ValueType OpTy = Node->getOperand(0).getValueType();
1836 switch (getTypeAction(OpTy)) {
1837 default: assert(0 && "EXTRACT_ELEMENT action for type unimplemented!");
1839 if (cast<ConstantSDNode>(Node->getOperand(1))->getValue()) {
1841 Result = DAG.getNode(ISD::SRL, OpTy, Node->getOperand(0),
1842 DAG.getConstant(MVT::getSizeInBits(OpTy)/2,
1843 TLI.getShiftAmountTy()));
1844 Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), Result);
1847 Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0),
1848 Node->getOperand(0));
1852 // Get both the low and high parts.
1853 ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
1854 if (cast<ConstantSDNode>(Node->getOperand(1))->getValue())
1855 Result = Tmp2; // 1 -> Hi
1857 Result = Tmp1; // 0 -> Lo
1863 case ISD::CopyToReg:
1864 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1866 assert(isTypeLegal(Node->getOperand(2).getValueType()) &&
1867 "Register type must be legal!");
1868 // Legalize the incoming value (must be a legal type).
1869 Tmp2 = LegalizeOp(Node->getOperand(2));
1870 if (Node->getNumValues() == 1) {
1871 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1), Tmp2);
1873 assert(Node->getNumValues() == 2 && "Unknown CopyToReg");
1874 if (Node->getNumOperands() == 4) {
1875 Tmp3 = LegalizeOp(Node->getOperand(3));
1876 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1), Tmp2,
1879 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1),Tmp2);
1882 // Since this produces two values, make sure to remember that we legalized
1884 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
1885 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
1891 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1893 // Ensure that libcalls are emitted before a return.
1894 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1895 Tmp1 = LegalizeOp(Tmp1);
1896 LastCALLSEQ_END = DAG.getEntryNode();
1898 switch (Node->getNumOperands()) {
1900 Tmp2 = Node->getOperand(1);
1901 Tmp3 = Node->getOperand(2); // Signness
1902 switch (getTypeAction(Tmp2.getValueType())) {
1904 Result = DAG.UpdateNodeOperands(Result, Tmp1, LegalizeOp(Tmp2), Tmp3);
1907 if (!MVT::isVector(Tmp2.getValueType())) {
1909 ExpandOp(Tmp2, Lo, Hi);
1911 // Big endian systems want the hi reg first.
1912 if (!TLI.isLittleEndian())
1916 Result = DAG.getNode(ISD::RET, MVT::Other, Tmp1, Lo, Tmp3, Hi,Tmp3);
1918 Result = DAG.getNode(ISD::RET, MVT::Other, Tmp1, Lo, Tmp3);
1919 Result = LegalizeOp(Result);
1921 SDNode *InVal = Tmp2.Val;
1922 unsigned NumElems = MVT::getVectorNumElements(InVal->getValueType(0));
1923 MVT::ValueType EVT = MVT::getVectorElementType(InVal->getValueType(0));
1925 // Figure out if there is a simple type corresponding to this Vector
1926 // type. If so, convert to the vector type.
1927 MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
1928 if (TLI.isTypeLegal(TVT)) {
1929 // Turn this into a return of the vector type.
1930 Tmp2 = LegalizeOp(Tmp2);
1931 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1932 } else if (NumElems == 1) {
1933 // Turn this into a return of the scalar type.
1934 Tmp2 = ScalarizeVectorOp(Tmp2);
1935 Tmp2 = LegalizeOp(Tmp2);
1936 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1938 // FIXME: Returns of gcc generic vectors smaller than a legal type
1939 // should be returned in integer registers!
1941 // The scalarized value type may not be legal, e.g. it might require
1942 // promotion or expansion. Relegalize the return.
1943 Result = LegalizeOp(Result);
1945 // FIXME: Returns of gcc generic vectors larger than a legal vector
1946 // type should be returned by reference!
1948 SplitVectorOp(Tmp2, Lo, Hi);
1949 Result = DAG.getNode(ISD::RET, MVT::Other, Tmp1, Lo, Tmp3, Hi,Tmp3);
1950 Result = LegalizeOp(Result);
1955 Tmp2 = PromoteOp(Node->getOperand(1));
1956 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1957 Result = LegalizeOp(Result);
1962 Result = DAG.UpdateNodeOperands(Result, Tmp1);
1964 default: { // ret <values>
1965 SmallVector<SDOperand, 8> NewValues;
1966 NewValues.push_back(Tmp1);
1967 for (unsigned i = 1, e = Node->getNumOperands(); i < e; i += 2)
1968 switch (getTypeAction(Node->getOperand(i).getValueType())) {
1970 NewValues.push_back(LegalizeOp(Node->getOperand(i)));
1971 NewValues.push_back(Node->getOperand(i+1));
1975 assert(!MVT::isExtendedVT(Node->getOperand(i).getValueType()) &&
1976 "FIXME: TODO: implement returning non-legal vector types!");
1977 ExpandOp(Node->getOperand(i), Lo, Hi);
1978 NewValues.push_back(Lo);
1979 NewValues.push_back(Node->getOperand(i+1));
1981 NewValues.push_back(Hi);
1982 NewValues.push_back(Node->getOperand(i+1));
1987 assert(0 && "Can't promote multiple return value yet!");
1990 if (NewValues.size() == Node->getNumOperands())
1991 Result = DAG.UpdateNodeOperands(Result, &NewValues[0],NewValues.size());
1993 Result = DAG.getNode(ISD::RET, MVT::Other,
1994 &NewValues[0], NewValues.size());
1999 if (Result.getOpcode() == ISD::RET) {
2000 switch (TLI.getOperationAction(Result.getOpcode(), MVT::Other)) {
2001 default: assert(0 && "This action is not supported yet!");
2002 case TargetLowering::Legal: break;
2003 case TargetLowering::Custom:
2004 Tmp1 = TLI.LowerOperation(Result, DAG);
2005 if (Tmp1.Val) Result = Tmp1;
2011 StoreSDNode *ST = cast<StoreSDNode>(Node);
2012 Tmp1 = LegalizeOp(ST->getChain()); // Legalize the chain.
2013 Tmp2 = LegalizeOp(ST->getBasePtr()); // Legalize the pointer.
2014 int SVOffset = ST->getSrcValueOffset();
2015 unsigned Alignment = ST->getAlignment();
2016 bool isVolatile = ST->isVolatile();
2018 if (!ST->isTruncatingStore()) {
2019 // Turn 'store float 1.0, Ptr' -> 'store int 0x12345678, Ptr'
2020 // FIXME: We shouldn't do this for TargetConstantFP's.
2021 // FIXME: move this to the DAG Combiner! Note that we can't regress due
2022 // to phase ordering between legalized code and the dag combiner. This
2023 // probably means that we need to integrate dag combiner and legalizer
2025 // We generally can't do this one for long doubles.
2026 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(ST->getValue())) {
2027 if (CFP->getValueType(0) == MVT::f32 &&
2028 getTypeAction(MVT::i32) == Legal) {
2029 Tmp3 = DAG.getConstant((uint32_t)CFP->getValueAPF().
2030 convertToAPInt().getZExtValue(),
2032 Result = DAG.getStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
2033 SVOffset, isVolatile, Alignment);
2035 } else if (CFP->getValueType(0) == MVT::f64) {
2036 // If this target supports 64-bit registers, do a single 64-bit store.
2037 if (getTypeAction(MVT::i64) == Legal) {
2038 Tmp3 = DAG.getConstant(CFP->getValueAPF().convertToAPInt().
2039 getZExtValue(), MVT::i64);
2040 Result = DAG.getStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
2041 SVOffset, isVolatile, Alignment);
2043 } else if (getTypeAction(MVT::i32) == Legal) {
2044 // Otherwise, if the target supports 32-bit registers, use 2 32-bit
2045 // stores. If the target supports neither 32- nor 64-bits, this
2046 // xform is certainly not worth it.
2047 uint64_t IntVal =CFP->getValueAPF().convertToAPInt().getZExtValue();
2048 SDOperand Lo = DAG.getConstant(uint32_t(IntVal), MVT::i32);
2049 SDOperand Hi = DAG.getConstant(uint32_t(IntVal >>32), MVT::i32);
2050 if (!TLI.isLittleEndian()) std::swap(Lo, Hi);
2052 Lo = DAG.getStore(Tmp1, Lo, Tmp2, ST->getSrcValue(),
2053 SVOffset, isVolatile, Alignment);
2054 Tmp2 = DAG.getNode(ISD::ADD, Tmp2.getValueType(), Tmp2,
2055 getIntPtrConstant(4));
2056 Hi = DAG.getStore(Tmp1, Hi, Tmp2, ST->getSrcValue(), SVOffset+4,
2057 isVolatile, std::max(Alignment, 4U));
2059 Result = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo, Hi);
2065 switch (getTypeAction(ST->getStoredVT())) {
2067 Tmp3 = LegalizeOp(ST->getValue());
2068 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp3, Tmp2,
2071 MVT::ValueType VT = Tmp3.getValueType();
2072 switch (TLI.getOperationAction(ISD::STORE, VT)) {
2073 default: assert(0 && "This action is not supported yet!");
2074 case TargetLowering::Legal:
2075 // If this is an unaligned store and the target doesn't support it,
2077 if (!TLI.allowsUnalignedMemoryAccesses()) {
2078 unsigned ABIAlignment = TLI.getTargetData()->
2079 getABITypeAlignment(MVT::getTypeForValueType(ST->getStoredVT()));
2080 if (ST->getAlignment() < ABIAlignment)
2081 Result = ExpandUnalignedStore(cast<StoreSDNode>(Result.Val), DAG,
2085 case TargetLowering::Custom:
2086 Tmp1 = TLI.LowerOperation(Result, DAG);
2087 if (Tmp1.Val) Result = Tmp1;
2089 case TargetLowering::Promote:
2090 assert(MVT::isVector(VT) && "Unknown legal promote case!");
2091 Tmp3 = DAG.getNode(ISD::BIT_CONVERT,
2092 TLI.getTypeToPromoteTo(ISD::STORE, VT), Tmp3);
2093 Result = DAG.getStore(Tmp1, Tmp3, Tmp2,
2094 ST->getSrcValue(), SVOffset, isVolatile,
2101 // Truncate the value and store the result.
2102 Tmp3 = PromoteOp(ST->getValue());
2103 Result = DAG.getTruncStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
2104 SVOffset, ST->getStoredVT(),
2105 isVolatile, Alignment);
2109 unsigned IncrementSize = 0;
2112 // If this is a vector type, then we have to calculate the increment as
2113 // the product of the element size in bytes, and the number of elements
2114 // in the high half of the vector.
2115 if (MVT::isVector(ST->getValue().getValueType())) {
2116 SDNode *InVal = ST->getValue().Val;
2117 unsigned NumElems = MVT::getVectorNumElements(InVal->getValueType(0));
2118 MVT::ValueType EVT = MVT::getVectorElementType(InVal->getValueType(0));
2120 // Figure out if there is a simple type corresponding to this Vector
2121 // type. If so, convert to the vector type.
2122 MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
2123 if (TLI.isTypeLegal(TVT)) {
2124 // Turn this into a normal store of the vector type.
2125 Tmp3 = LegalizeOp(Node->getOperand(1));
2126 Result = DAG.getStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
2127 SVOffset, isVolatile, Alignment);
2128 Result = LegalizeOp(Result);
2130 } else if (NumElems == 1) {
2131 // Turn this into a normal store of the scalar type.
2132 Tmp3 = ScalarizeVectorOp(Node->getOperand(1));
2133 Result = DAG.getStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
2134 SVOffset, isVolatile, Alignment);
2135 // The scalarized value type may not be legal, e.g. it might require
2136 // promotion or expansion. Relegalize the scalar store.
2137 Result = LegalizeOp(Result);
2140 SplitVectorOp(Node->getOperand(1), Lo, Hi);
2141 IncrementSize = NumElems/2 * MVT::getSizeInBits(EVT)/8;
2144 ExpandOp(Node->getOperand(1), Lo, Hi);
2145 IncrementSize = Hi.Val ? MVT::getSizeInBits(Hi.getValueType())/8 : 0;
2147 if (!TLI.isLittleEndian())
2151 Lo = DAG.getStore(Tmp1, Lo, Tmp2, ST->getSrcValue(),
2152 SVOffset, isVolatile, Alignment);
2154 if (Hi.Val == NULL) {
2155 // Must be int <-> float one-to-one expansion.
2160 Tmp2 = DAG.getNode(ISD::ADD, Tmp2.getValueType(), Tmp2,
2161 getIntPtrConstant(IncrementSize));
2162 assert(isTypeLegal(Tmp2.getValueType()) &&
2163 "Pointers must be legal!");
2164 SVOffset += IncrementSize;
2165 if (Alignment > IncrementSize)
2166 Alignment = IncrementSize;
2167 Hi = DAG.getStore(Tmp1, Hi, Tmp2, ST->getSrcValue(),
2168 SVOffset, isVolatile, Alignment);
2169 Result = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo, Hi);
2174 assert(isTypeLegal(ST->getValue().getValueType()) &&
2175 "Cannot handle illegal TRUNCSTORE yet!");
2176 Tmp3 = LegalizeOp(ST->getValue());
2178 // The only promote case we handle is TRUNCSTORE:i1 X into
2179 // -> TRUNCSTORE:i8 (and X, 1)
2180 if (ST->getStoredVT() == MVT::i1 &&
2181 TLI.getStoreXAction(MVT::i1) == TargetLowering::Promote) {
2182 // Promote the bool to a mask then store.
2183 Tmp3 = DAG.getNode(ISD::AND, Tmp3.getValueType(), Tmp3,
2184 DAG.getConstant(1, Tmp3.getValueType()));
2185 Result = DAG.getTruncStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
2187 isVolatile, Alignment);
2188 } else if (Tmp1 != ST->getChain() || Tmp3 != ST->getValue() ||
2189 Tmp2 != ST->getBasePtr()) {
2190 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp3, Tmp2,
2194 MVT::ValueType StVT = cast<StoreSDNode>(Result.Val)->getStoredVT();
2195 switch (TLI.getStoreXAction(StVT)) {
2196 default: assert(0 && "This action is not supported yet!");
2197 case TargetLowering::Legal:
2198 // If this is an unaligned store and the target doesn't support it,
2200 if (!TLI.allowsUnalignedMemoryAccesses()) {
2201 unsigned ABIAlignment = TLI.getTargetData()->
2202 getABITypeAlignment(MVT::getTypeForValueType(ST->getStoredVT()));
2203 if (ST->getAlignment() < ABIAlignment)
2204 Result = ExpandUnalignedStore(cast<StoreSDNode>(Result.Val), DAG,
2208 case TargetLowering::Custom:
2209 Tmp1 = TLI.LowerOperation(Result, DAG);
2210 if (Tmp1.Val) Result = Tmp1;
2217 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2218 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
2220 case ISD::STACKSAVE:
2221 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2222 Result = DAG.UpdateNodeOperands(Result, Tmp1);
2223 Tmp1 = Result.getValue(0);
2224 Tmp2 = Result.getValue(1);
2226 switch (TLI.getOperationAction(ISD::STACKSAVE, MVT::Other)) {
2227 default: assert(0 && "This action is not supported yet!");
2228 case TargetLowering::Legal: break;
2229 case TargetLowering::Custom:
2230 Tmp3 = TLI.LowerOperation(Result, DAG);
2232 Tmp1 = LegalizeOp(Tmp3);
2233 Tmp2 = LegalizeOp(Tmp3.getValue(1));
2236 case TargetLowering::Expand:
2237 // Expand to CopyFromReg if the target set
2238 // StackPointerRegisterToSaveRestore.
2239 if (unsigned SP = TLI.getStackPointerRegisterToSaveRestore()) {
2240 Tmp1 = DAG.getCopyFromReg(Result.getOperand(0), SP,
2241 Node->getValueType(0));
2242 Tmp2 = Tmp1.getValue(1);
2244 Tmp1 = DAG.getNode(ISD::UNDEF, Node->getValueType(0));
2245 Tmp2 = Node->getOperand(0);
2250 // Since stacksave produce two values, make sure to remember that we
2251 // legalized both of them.
2252 AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
2253 AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
2254 return Op.ResNo ? Tmp2 : Tmp1;
2256 case ISD::STACKRESTORE:
2257 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2258 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
2259 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2261 switch (TLI.getOperationAction(ISD::STACKRESTORE, MVT::Other)) {
2262 default: assert(0 && "This action is not supported yet!");
2263 case TargetLowering::Legal: break;
2264 case TargetLowering::Custom:
2265 Tmp1 = TLI.LowerOperation(Result, DAG);
2266 if (Tmp1.Val) Result = Tmp1;
2268 case TargetLowering::Expand:
2269 // Expand to CopyToReg if the target set
2270 // StackPointerRegisterToSaveRestore.
2271 if (unsigned SP = TLI.getStackPointerRegisterToSaveRestore()) {
2272 Result = DAG.getCopyToReg(Tmp1, SP, Tmp2);
2280 case ISD::READCYCLECOUNTER:
2281 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain
2282 Result = DAG.UpdateNodeOperands(Result, Tmp1);
2283 switch (TLI.getOperationAction(ISD::READCYCLECOUNTER,
2284 Node->getValueType(0))) {
2285 default: assert(0 && "This action is not supported yet!");
2286 case TargetLowering::Legal:
2287 Tmp1 = Result.getValue(0);
2288 Tmp2 = Result.getValue(1);
2290 case TargetLowering::Custom:
2291 Result = TLI.LowerOperation(Result, DAG);
2292 Tmp1 = LegalizeOp(Result.getValue(0));
2293 Tmp2 = LegalizeOp(Result.getValue(1));
2297 // Since rdcc produce two values, make sure to remember that we legalized
2299 AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
2300 AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
2304 switch (getTypeAction(Node->getOperand(0).getValueType())) {
2305 case Expand: assert(0 && "It's impossible to expand bools");
2307 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the condition.
2310 Tmp1 = PromoteOp(Node->getOperand(0)); // Promote the condition.
2311 // Make sure the condition is either zero or one.
2312 if (!DAG.MaskedValueIsZero(Tmp1,
2313 MVT::getIntVTBitMask(Tmp1.getValueType())^1))
2314 Tmp1 = DAG.getZeroExtendInReg(Tmp1, MVT::i1);
2317 Tmp2 = LegalizeOp(Node->getOperand(1)); // TrueVal
2318 Tmp3 = LegalizeOp(Node->getOperand(2)); // FalseVal
2320 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
2322 switch (TLI.getOperationAction(ISD::SELECT, Tmp2.getValueType())) {
2323 default: assert(0 && "This action is not supported yet!");
2324 case TargetLowering::Legal: break;
2325 case TargetLowering::Custom: {
2326 Tmp1 = TLI.LowerOperation(Result, DAG);
2327 if (Tmp1.Val) Result = Tmp1;
2330 case TargetLowering::Expand:
2331 if (Tmp1.getOpcode() == ISD::SETCC) {
2332 Result = DAG.getSelectCC(Tmp1.getOperand(0), Tmp1.getOperand(1),
2334 cast<CondCodeSDNode>(Tmp1.getOperand(2))->get());
2336 Result = DAG.getSelectCC(Tmp1,
2337 DAG.getConstant(0, Tmp1.getValueType()),
2338 Tmp2, Tmp3, ISD::SETNE);
2341 case TargetLowering::Promote: {
2342 MVT::ValueType NVT =
2343 TLI.getTypeToPromoteTo(ISD::SELECT, Tmp2.getValueType());
2344 unsigned ExtOp, TruncOp;
2345 if (MVT::isVector(Tmp2.getValueType())) {
2346 ExtOp = ISD::BIT_CONVERT;
2347 TruncOp = ISD::BIT_CONVERT;
2348 } else if (MVT::isInteger(Tmp2.getValueType())) {
2349 ExtOp = ISD::ANY_EXTEND;
2350 TruncOp = ISD::TRUNCATE;
2352 ExtOp = ISD::FP_EXTEND;
2353 TruncOp = ISD::FP_ROUND;
2355 // Promote each of the values to the new type.
2356 Tmp2 = DAG.getNode(ExtOp, NVT, Tmp2);
2357 Tmp3 = DAG.getNode(ExtOp, NVT, Tmp3);
2358 // Perform the larger operation, then round down.
2359 Result = DAG.getNode(ISD::SELECT, NVT, Tmp1, Tmp2,Tmp3);
2360 Result = DAG.getNode(TruncOp, Node->getValueType(0), Result);
2365 case ISD::SELECT_CC: {
2366 Tmp1 = Node->getOperand(0); // LHS
2367 Tmp2 = Node->getOperand(1); // RHS
2368 Tmp3 = LegalizeOp(Node->getOperand(2)); // True
2369 Tmp4 = LegalizeOp(Node->getOperand(3)); // False
2370 SDOperand CC = Node->getOperand(4);
2372 LegalizeSetCCOperands(Tmp1, Tmp2, CC);
2374 // If we didn't get both a LHS and RHS back from LegalizeSetCCOperands,
2375 // the LHS is a legal SETCC itself. In this case, we need to compare
2376 // the result against zero to select between true and false values.
2377 if (Tmp2.Val == 0) {
2378 Tmp2 = DAG.getConstant(0, Tmp1.getValueType());
2379 CC = DAG.getCondCode(ISD::SETNE);
2381 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3, Tmp4, CC);
2383 // Everything is legal, see if we should expand this op or something.
2384 switch (TLI.getOperationAction(ISD::SELECT_CC, Tmp3.getValueType())) {
2385 default: assert(0 && "This action is not supported yet!");
2386 case TargetLowering::Legal: break;
2387 case TargetLowering::Custom:
2388 Tmp1 = TLI.LowerOperation(Result, DAG);
2389 if (Tmp1.Val) Result = Tmp1;
2395 Tmp1 = Node->getOperand(0);
2396 Tmp2 = Node->getOperand(1);
2397 Tmp3 = Node->getOperand(2);
2398 LegalizeSetCCOperands(Tmp1, Tmp2, Tmp3);
2400 // If we had to Expand the SetCC operands into a SELECT node, then it may
2401 // not always be possible to return a true LHS & RHS. In this case, just
2402 // return the value we legalized, returned in the LHS
2403 if (Tmp2.Val == 0) {
2408 switch (TLI.getOperationAction(ISD::SETCC, Tmp1.getValueType())) {
2409 default: assert(0 && "Cannot handle this action for SETCC yet!");
2410 case TargetLowering::Custom:
2413 case TargetLowering::Legal:
2414 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
2416 Tmp4 = TLI.LowerOperation(Result, DAG);
2417 if (Tmp4.Val) Result = Tmp4;
2420 case TargetLowering::Promote: {
2421 // First step, figure out the appropriate operation to use.
2422 // Allow SETCC to not be supported for all legal data types
2423 // Mostly this targets FP
2424 MVT::ValueType NewInTy = Node->getOperand(0).getValueType();
2425 MVT::ValueType OldVT = NewInTy; OldVT = OldVT;
2427 // Scan for the appropriate larger type to use.
2429 NewInTy = (MVT::ValueType)(NewInTy+1);
2431 assert(MVT::isInteger(NewInTy) == MVT::isInteger(OldVT) &&
2432 "Fell off of the edge of the integer world");
2433 assert(MVT::isFloatingPoint(NewInTy) == MVT::isFloatingPoint(OldVT) &&
2434 "Fell off of the edge of the floating point world");
2436 // If the target supports SETCC of this type, use it.
2437 if (TLI.isOperationLegal(ISD::SETCC, NewInTy))
2440 if (MVT::isInteger(NewInTy))
2441 assert(0 && "Cannot promote Legal Integer SETCC yet");
2443 Tmp1 = DAG.getNode(ISD::FP_EXTEND, NewInTy, Tmp1);
2444 Tmp2 = DAG.getNode(ISD::FP_EXTEND, NewInTy, Tmp2);
2446 Tmp1 = LegalizeOp(Tmp1);
2447 Tmp2 = LegalizeOp(Tmp2);
2448 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
2449 Result = LegalizeOp(Result);
2452 case TargetLowering::Expand:
2453 // Expand a setcc node into a select_cc of the same condition, lhs, and
2454 // rhs that selects between const 1 (true) and const 0 (false).
2455 MVT::ValueType VT = Node->getValueType(0);
2456 Result = DAG.getNode(ISD::SELECT_CC, VT, Tmp1, Tmp2,
2457 DAG.getConstant(1, VT), DAG.getConstant(0, VT),
2464 case ISD::MEMMOVE: {
2465 Tmp1 = LegalizeOp(Node->getOperand(0)); // Chain
2466 Tmp2 = LegalizeOp(Node->getOperand(1)); // Pointer
2468 if (Node->getOpcode() == ISD::MEMSET) { // memset = ubyte
2469 switch (getTypeAction(Node->getOperand(2).getValueType())) {
2470 case Expand: assert(0 && "Cannot expand a byte!");
2472 Tmp3 = LegalizeOp(Node->getOperand(2));
2475 Tmp3 = PromoteOp(Node->getOperand(2));
2479 Tmp3 = LegalizeOp(Node->getOperand(2)); // memcpy/move = pointer,
2483 switch (getTypeAction(Node->getOperand(3).getValueType())) {
2485 // Length is too big, just take the lo-part of the length.
2487 ExpandOp(Node->getOperand(3), Tmp4, HiPart);
2491 Tmp4 = LegalizeOp(Node->getOperand(3));
2494 Tmp4 = PromoteOp(Node->getOperand(3));
2499 switch (getTypeAction(Node->getOperand(4).getValueType())) { // uint
2500 case Expand: assert(0 && "Cannot expand this yet!");
2502 Tmp5 = LegalizeOp(Node->getOperand(4));
2505 Tmp5 = PromoteOp(Node->getOperand(4));
2509 switch (TLI.getOperationAction(Node->getOpcode(), MVT::Other)) {
2510 default: assert(0 && "This action not implemented for this operation!");
2511 case TargetLowering::Custom:
2514 case TargetLowering::Legal:
2515 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3, Tmp4, Tmp5);
2517 Tmp1 = TLI.LowerOperation(Result, DAG);
2518 if (Tmp1.Val) Result = Tmp1;
2521 case TargetLowering::Expand: {
2522 // Otherwise, the target does not support this operation. Lower the
2523 // operation to an explicit libcall as appropriate.
2524 MVT::ValueType IntPtr = TLI.getPointerTy();
2525 const Type *IntPtrTy = TLI.getTargetData()->getIntPtrType();
2526 TargetLowering::ArgListTy Args;
2527 TargetLowering::ArgListEntry Entry;
2529 const char *FnName = 0;
2530 if (Node->getOpcode() == ISD::MEMSET) {
2531 Entry.Node = Tmp2; Entry.Ty = IntPtrTy;
2532 Args.push_back(Entry);
2533 // Extend the (previously legalized) ubyte argument to be an int value
2535 if (Tmp3.getValueType() > MVT::i32)
2536 Tmp3 = DAG.getNode(ISD::TRUNCATE, MVT::i32, Tmp3);
2538 Tmp3 = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Tmp3);
2539 Entry.Node = Tmp3; Entry.Ty = Type::Int32Ty; Entry.isSExt = true;
2540 Args.push_back(Entry);
2541 Entry.Node = Tmp4; Entry.Ty = IntPtrTy; Entry.isSExt = false;
2542 Args.push_back(Entry);
2545 } else if (Node->getOpcode() == ISD::MEMCPY ||
2546 Node->getOpcode() == ISD::MEMMOVE) {
2547 Entry.Ty = IntPtrTy;
2548 Entry.Node = Tmp2; Args.push_back(Entry);
2549 Entry.Node = Tmp3; Args.push_back(Entry);
2550 Entry.Node = Tmp4; Args.push_back(Entry);
2551 FnName = Node->getOpcode() == ISD::MEMMOVE ? "memmove" : "memcpy";
2553 assert(0 && "Unknown op!");
2556 std::pair<SDOperand,SDOperand> CallResult =
2557 TLI.LowerCallTo(Tmp1, Type::VoidTy, false, false, CallingConv::C, false,
2558 DAG.getExternalSymbol(FnName, IntPtr), Args, DAG);
2559 Result = CallResult.second;
2566 case ISD::SHL_PARTS:
2567 case ISD::SRA_PARTS:
2568 case ISD::SRL_PARTS: {
2569 SmallVector<SDOperand, 8> Ops;
2570 bool Changed = false;
2571 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
2572 Ops.push_back(LegalizeOp(Node->getOperand(i)));
2573 Changed |= Ops.back() != Node->getOperand(i);
2576 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
2578 switch (TLI.getOperationAction(Node->getOpcode(),
2579 Node->getValueType(0))) {
2580 default: assert(0 && "This action is not supported yet!");
2581 case TargetLowering::Legal: break;
2582 case TargetLowering::Custom:
2583 Tmp1 = TLI.LowerOperation(Result, DAG);
2585 SDOperand Tmp2, RetVal(0, 0);
2586 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i) {
2587 Tmp2 = LegalizeOp(Tmp1.getValue(i));
2588 AddLegalizedOperand(SDOperand(Node, i), Tmp2);
2592 assert(RetVal.Val && "Illegal result number");
2598 // Since these produce multiple values, make sure to remember that we
2599 // legalized all of them.
2600 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
2601 AddLegalizedOperand(SDOperand(Node, i), Result.getValue(i));
2602 return Result.getValue(Op.ResNo);
2624 Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
2625 switch (getTypeAction(Node->getOperand(1).getValueType())) {
2626 case Expand: assert(0 && "Not possible");
2628 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the RHS.
2631 Tmp2 = PromoteOp(Node->getOperand(1)); // Promote the RHS.
2635 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2637 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
2638 default: assert(0 && "BinOp legalize operation not supported");
2639 case TargetLowering::Legal: break;
2640 case TargetLowering::Custom:
2641 Tmp1 = TLI.LowerOperation(Result, DAG);
2642 if (Tmp1.Val) Result = Tmp1;
2644 case TargetLowering::Expand: {
2645 MVT::ValueType VT = Op.getValueType();
2647 // See if multiply or divide can be lowered using two-result operations.
2648 SDVTList VTs = DAG.getVTList(VT, VT);
2649 if (Node->getOpcode() == ISD::MUL) {
2650 // We just need the low half of the multiply; try both the signed
2651 // and unsigned forms. If the target supports both SMUL_LOHI and
2652 // UMUL_LOHI, form a preference by checking which forms of plain
2653 // MULH it supports.
2654 bool HasSMUL_LOHI = TLI.isOperationLegal(ISD::SMUL_LOHI, VT);
2655 bool HasUMUL_LOHI = TLI.isOperationLegal(ISD::UMUL_LOHI, VT);
2656 bool HasMULHS = TLI.isOperationLegal(ISD::MULHS, VT);
2657 bool HasMULHU = TLI.isOperationLegal(ISD::MULHU, VT);
2658 unsigned OpToUse = 0;
2659 if (HasSMUL_LOHI && !HasMULHS) {
2660 OpToUse = ISD::SMUL_LOHI;
2661 } else if (HasUMUL_LOHI && !HasMULHU) {
2662 OpToUse = ISD::UMUL_LOHI;
2663 } else if (HasSMUL_LOHI) {
2664 OpToUse = ISD::SMUL_LOHI;
2665 } else if (HasUMUL_LOHI) {
2666 OpToUse = ISD::UMUL_LOHI;
2669 Result = SDOperand(DAG.getNode(OpToUse, VTs, Tmp1, Tmp2).Val, 0);
2673 if (Node->getOpcode() == ISD::MULHS &&
2674 TLI.isOperationLegal(ISD::SMUL_LOHI, VT)) {
2675 Result = SDOperand(DAG.getNode(ISD::SMUL_LOHI, VTs, Tmp1, Tmp2).Val, 1);
2678 if (Node->getOpcode() == ISD::MULHU &&
2679 TLI.isOperationLegal(ISD::UMUL_LOHI, VT)) {
2680 Result = SDOperand(DAG.getNode(ISD::UMUL_LOHI, VTs, Tmp1, Tmp2).Val, 1);
2683 if (Node->getOpcode() == ISD::SDIV &&
2684 TLI.isOperationLegal(ISD::SDIVREM, VT)) {
2685 Result = SDOperand(DAG.getNode(ISD::SDIVREM, VTs, Tmp1, Tmp2).Val, 0);
2688 if (Node->getOpcode() == ISD::UDIV &&
2689 TLI.isOperationLegal(ISD::UDIVREM, VT)) {
2690 Result = SDOperand(DAG.getNode(ISD::UDIVREM, VTs, Tmp1, Tmp2).Val, 0);
2694 // Check to see if we have a libcall for this operator.
2695 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
2696 bool isSigned = false;
2697 switch (Node->getOpcode()) {
2700 if (VT == MVT::i32) {
2701 LC = Node->getOpcode() == ISD::UDIV
2702 ? RTLIB::UDIV_I32 : RTLIB::SDIV_I32;
2703 isSigned = Node->getOpcode() == ISD::SDIV;
2707 LC = VT == MVT::f32 ? RTLIB::POW_F32 :
2708 VT == MVT::f64 ? RTLIB::POW_F64 :
2709 VT == MVT::f80 ? RTLIB::POW_F80 :
2710 VT == MVT::ppcf128 ? RTLIB::POW_PPCF128 :
2711 RTLIB::UNKNOWN_LIBCALL;
2715 if (LC != RTLIB::UNKNOWN_LIBCALL) {
2717 Result = ExpandLibCall(TLI.getLibcallName(LC), Node, isSigned, Dummy);
2721 assert(MVT::isVector(Node->getValueType(0)) &&
2722 "Cannot expand this binary operator!");
2723 // Expand the operation into a bunch of nasty scalar code.
2724 Result = LegalizeOp(UnrollVectorOp(Op));
2727 case TargetLowering::Promote: {
2728 switch (Node->getOpcode()) {
2729 default: assert(0 && "Do not know how to promote this BinOp!");
2733 MVT::ValueType OVT = Node->getValueType(0);
2734 MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
2735 assert(MVT::isVector(OVT) && "Cannot promote this BinOp!");
2736 // Bit convert each of the values to the new type.
2737 Tmp1 = DAG.getNode(ISD::BIT_CONVERT, NVT, Tmp1);
2738 Tmp2 = DAG.getNode(ISD::BIT_CONVERT, NVT, Tmp2);
2739 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
2740 // Bit convert the result back the original type.
2741 Result = DAG.getNode(ISD::BIT_CONVERT, OVT, Result);
2749 case ISD::SMUL_LOHI:
2750 case ISD::UMUL_LOHI:
2753 // These nodes will only be produced by target-specific lowering, so
2754 // they shouldn't be here if they aren't legal.
2755 assert(TLI.isOperationLegal(Node->getOpcode(), Node->getValueType(0)) &&
2756 "This must be legal!");
2758 Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
2759 Tmp2 = LegalizeOp(Node->getOperand(1)); // RHS
2760 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2763 case ISD::FCOPYSIGN: // FCOPYSIGN does not require LHS/RHS to match type!
2764 Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
2765 switch (getTypeAction(Node->getOperand(1).getValueType())) {
2766 case Expand: assert(0 && "Not possible");
2768 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the RHS.
2771 Tmp2 = PromoteOp(Node->getOperand(1)); // Promote the RHS.
2775 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2777 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
2778 default: assert(0 && "Operation not supported");
2779 case TargetLowering::Custom:
2780 Tmp1 = TLI.LowerOperation(Result, DAG);
2781 if (Tmp1.Val) Result = Tmp1;
2783 case TargetLowering::Legal: break;
2784 case TargetLowering::Expand: {
2785 // If this target supports fabs/fneg natively and select is cheap,
2786 // do this efficiently.
2787 if (!TLI.isSelectExpensive() &&
2788 TLI.getOperationAction(ISD::FABS, Tmp1.getValueType()) ==
2789 TargetLowering::Legal &&
2790 TLI.getOperationAction(ISD::FNEG, Tmp1.getValueType()) ==
2791 TargetLowering::Legal) {
2792 // Get the sign bit of the RHS.
2793 MVT::ValueType IVT =
2794 Tmp2.getValueType() == MVT::f32 ? MVT::i32 : MVT::i64;
2795 SDOperand SignBit = DAG.getNode(ISD::BIT_CONVERT, IVT, Tmp2);
2796 SignBit = DAG.getSetCC(TLI.getSetCCResultTy(),
2797 SignBit, DAG.getConstant(0, IVT), ISD::SETLT);
2798 // Get the absolute value of the result.
2799 SDOperand AbsVal = DAG.getNode(ISD::FABS, Tmp1.getValueType(), Tmp1);
2800 // Select between the nabs and abs value based on the sign bit of
2802 Result = DAG.getNode(ISD::SELECT, AbsVal.getValueType(), SignBit,
2803 DAG.getNode(ISD::FNEG, AbsVal.getValueType(),
2806 Result = LegalizeOp(Result);
2810 // Otherwise, do bitwise ops!
2811 MVT::ValueType NVT =
2812 Node->getValueType(0) == MVT::f32 ? MVT::i32 : MVT::i64;
2813 Result = ExpandFCOPYSIGNToBitwiseOps(Node, NVT, DAG, TLI);
2814 Result = DAG.getNode(ISD::BIT_CONVERT, Node->getValueType(0), Result);
2815 Result = LegalizeOp(Result);
2823 Tmp1 = LegalizeOp(Node->getOperand(0));
2824 Tmp2 = LegalizeOp(Node->getOperand(1));
2825 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2826 // Since this produces two values, make sure to remember that we legalized
2828 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
2829 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
2834 Tmp1 = LegalizeOp(Node->getOperand(0));
2835 Tmp2 = LegalizeOp(Node->getOperand(1));
2836 Tmp3 = LegalizeOp(Node->getOperand(2));
2837 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
2838 // Since this produces two values, make sure to remember that we legalized
2840 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
2841 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
2844 case ISD::BUILD_PAIR: {
2845 MVT::ValueType PairTy = Node->getValueType(0);
2846 // TODO: handle the case where the Lo and Hi operands are not of legal type
2847 Tmp1 = LegalizeOp(Node->getOperand(0)); // Lo
2848 Tmp2 = LegalizeOp(Node->getOperand(1)); // Hi
2849 switch (TLI.getOperationAction(ISD::BUILD_PAIR, PairTy)) {
2850 case TargetLowering::Promote:
2851 case TargetLowering::Custom:
2852 assert(0 && "Cannot promote/custom this yet!");
2853 case TargetLowering::Legal:
2854 if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1))
2855 Result = DAG.getNode(ISD::BUILD_PAIR, PairTy, Tmp1, Tmp2);
2857 case TargetLowering::Expand:
2858 Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, PairTy, Tmp1);
2859 Tmp2 = DAG.getNode(ISD::ANY_EXTEND, PairTy, Tmp2);
2860 Tmp2 = DAG.getNode(ISD::SHL, PairTy, Tmp2,
2861 DAG.getConstant(MVT::getSizeInBits(PairTy)/2,
2862 TLI.getShiftAmountTy()));
2863 Result = DAG.getNode(ISD::OR, PairTy, Tmp1, Tmp2);
2872 Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
2873 Tmp2 = LegalizeOp(Node->getOperand(1)); // RHS
2875 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
2876 case TargetLowering::Promote: assert(0 && "Cannot promote this yet!");
2877 case TargetLowering::Custom:
2880 case TargetLowering::Legal:
2881 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2883 Tmp1 = TLI.LowerOperation(Result, DAG);
2884 if (Tmp1.Val) Result = Tmp1;
2887 case TargetLowering::Expand: {
2888 unsigned DivOpc= (Node->getOpcode() == ISD::UREM) ? ISD::UDIV : ISD::SDIV;
2889 bool isSigned = DivOpc == ISD::SDIV;
2890 MVT::ValueType VT = Node->getValueType(0);
2892 // See if remainder can be lowered using two-result operations.
2893 SDVTList VTs = DAG.getVTList(VT, VT);
2894 if (Node->getOpcode() == ISD::SREM &&
2895 TLI.isOperationLegal(ISD::SDIVREM, VT)) {
2896 Result = SDOperand(DAG.getNode(ISD::SDIVREM, VTs, Tmp1, Tmp2).Val, 1);
2899 if (Node->getOpcode() == ISD::UREM &&
2900 TLI.isOperationLegal(ISD::UDIVREM, VT)) {
2901 Result = SDOperand(DAG.getNode(ISD::UDIVREM, VTs, Tmp1, Tmp2).Val, 1);
2905 if (MVT::isInteger(VT)) {
2906 if (TLI.getOperationAction(DivOpc, VT) ==
2907 TargetLowering::Legal) {
2909 Result = DAG.getNode(DivOpc, VT, Tmp1, Tmp2);
2910 Result = DAG.getNode(ISD::MUL, VT, Result, Tmp2);
2911 Result = DAG.getNode(ISD::SUB, VT, Tmp1, Result);
2913 assert(VT == MVT::i32 &&
2914 "Cannot expand this binary operator!");
2915 RTLIB::Libcall LC = Node->getOpcode() == ISD::UREM
2916 ? RTLIB::UREM_I32 : RTLIB::SREM_I32;
2918 Result = ExpandLibCall(TLI.getLibcallName(LC), Node, isSigned, Dummy);
2921 // Floating point mod -> fmod libcall.
2922 RTLIB::Libcall LC = VT == MVT::f32
2923 ? RTLIB::REM_F32 : RTLIB::REM_F64;
2925 Result = ExpandLibCall(TLI.getLibcallName(LC), Node,
2926 false/*sign irrelevant*/, Dummy);
2933 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2934 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
2936 MVT::ValueType VT = Node->getValueType(0);
2937 switch (TLI.getOperationAction(Node->getOpcode(), MVT::Other)) {
2938 default: assert(0 && "This action is not supported yet!");
2939 case TargetLowering::Custom:
2942 case TargetLowering::Legal:
2943 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
2944 Result = Result.getValue(0);
2945 Tmp1 = Result.getValue(1);
2948 Tmp2 = TLI.LowerOperation(Result, DAG);
2950 Result = LegalizeOp(Tmp2);
2951 Tmp1 = LegalizeOp(Tmp2.getValue(1));
2955 case TargetLowering::Expand: {
2956 SrcValueSDNode *SV = cast<SrcValueSDNode>(Node->getOperand(2));
2957 SDOperand VAList = DAG.getLoad(TLI.getPointerTy(), Tmp1, Tmp2,
2958 SV->getValue(), SV->getOffset());
2959 // Increment the pointer, VAList, to the next vaarg
2960 Tmp3 = DAG.getNode(ISD::ADD, TLI.getPointerTy(), VAList,
2961 DAG.getConstant(MVT::getSizeInBits(VT)/8,
2962 TLI.getPointerTy()));
2963 // Store the incremented VAList to the legalized pointer
2964 Tmp3 = DAG.getStore(VAList.getValue(1), Tmp3, Tmp2, SV->getValue(),
2966 // Load the actual argument out of the pointer VAList
2967 Result = DAG.getLoad(VT, Tmp3, VAList, NULL, 0);
2968 Tmp1 = LegalizeOp(Result.getValue(1));
2969 Result = LegalizeOp(Result);
2973 // Since VAARG produces two values, make sure to remember that we
2974 // legalized both of them.
2975 AddLegalizedOperand(SDOperand(Node, 0), Result);
2976 AddLegalizedOperand(SDOperand(Node, 1), Tmp1);
2977 return Op.ResNo ? Tmp1 : Result;
2981 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2982 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the dest pointer.
2983 Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the source pointer.
2985 switch (TLI.getOperationAction(ISD::VACOPY, MVT::Other)) {
2986 default: assert(0 && "This action is not supported yet!");
2987 case TargetLowering::Custom:
2990 case TargetLowering::Legal:
2991 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3,
2992 Node->getOperand(3), Node->getOperand(4));
2994 Tmp1 = TLI.LowerOperation(Result, DAG);
2995 if (Tmp1.Val) Result = Tmp1;
2998 case TargetLowering::Expand:
2999 // This defaults to loading a pointer from the input and storing it to the
3000 // output, returning the chain.
3001 SrcValueSDNode *SVD = cast<SrcValueSDNode>(Node->getOperand(3));
3002 SrcValueSDNode *SVS = cast<SrcValueSDNode>(Node->getOperand(4));
3003 Tmp4 = DAG.getLoad(TLI.getPointerTy(), Tmp1, Tmp3, SVD->getValue(),
3005 Result = DAG.getStore(Tmp4.getValue(1), Tmp4, Tmp2, SVS->getValue(),
3012 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
3013 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
3015 switch (TLI.getOperationAction(ISD::VAEND, MVT::Other)) {
3016 default: assert(0 && "This action is not supported yet!");
3017 case TargetLowering::Custom:
3020 case TargetLowering::Legal:
3021 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
3023 Tmp1 = TLI.LowerOperation(Tmp1, DAG);
3024 if (Tmp1.Val) Result = Tmp1;
3027 case TargetLowering::Expand:
3028 Result = Tmp1; // Default to a no-op, return the chain
3034 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
3035 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
3037 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
3039 switch (TLI.getOperationAction(ISD::VASTART, MVT::Other)) {
3040 default: assert(0 && "This action is not supported yet!");
3041 case TargetLowering::Legal: break;
3042 case TargetLowering::Custom:
3043 Tmp1 = TLI.LowerOperation(Result, DAG);
3044 if (Tmp1.Val) Result = Tmp1;
3051 Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
3052 Tmp2 = LegalizeOp(Node->getOperand(1)); // RHS
3053 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
3054 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
3056 assert(0 && "ROTL/ROTR legalize operation not supported");
3058 case TargetLowering::Legal:
3060 case TargetLowering::Custom:
3061 Tmp1 = TLI.LowerOperation(Result, DAG);
3062 if (Tmp1.Val) Result = Tmp1;
3064 case TargetLowering::Promote:
3065 assert(0 && "Do not know how to promote ROTL/ROTR");
3067 case TargetLowering::Expand:
3068 assert(0 && "Do not know how to expand ROTL/ROTR");
3074 Tmp1 = LegalizeOp(Node->getOperand(0)); // Op
3075 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
3076 case TargetLowering::Custom:
3077 assert(0 && "Cannot custom legalize this yet!");
3078 case TargetLowering::Legal:
3079 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3081 case TargetLowering::Promote: {
3082 MVT::ValueType OVT = Tmp1.getValueType();
3083 MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
3084 unsigned DiffBits = MVT::getSizeInBits(NVT) - MVT::getSizeInBits(OVT);
3086 Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Tmp1);
3087 Tmp1 = DAG.getNode(ISD::BSWAP, NVT, Tmp1);
3088 Result = DAG.getNode(ISD::SRL, NVT, Tmp1,
3089 DAG.getConstant(DiffBits, TLI.getShiftAmountTy()));
3092 case TargetLowering::Expand:
3093 Result = ExpandBSWAP(Tmp1);
3101 Tmp1 = LegalizeOp(Node->getOperand(0)); // Op
3102 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
3103 case TargetLowering::Custom:
3104 case TargetLowering::Legal:
3105 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3106 if (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0)) ==
3107 TargetLowering::Custom) {
3108 Tmp1 = TLI.LowerOperation(Result, DAG);
3114 case TargetLowering::Promote: {
3115 MVT::ValueType OVT = Tmp1.getValueType();
3116 MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
3118 // Zero extend the argument.
3119 Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Tmp1);
3120 // Perform the larger operation, then subtract if needed.
3121 Tmp1 = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1);
3122 switch (Node->getOpcode()) {
3127 //if Tmp1 == sizeinbits(NVT) then Tmp1 = sizeinbits(Old VT)
3128 Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), Tmp1,
3129 DAG.getConstant(MVT::getSizeInBits(NVT), NVT),
3131 Result = DAG.getNode(ISD::SELECT, NVT, Tmp2,
3132 DAG.getConstant(MVT::getSizeInBits(OVT),NVT), Tmp1);
3135 // Tmp1 = Tmp1 - (sizeinbits(NVT) - sizeinbits(Old VT))
3136 Result = DAG.getNode(ISD::SUB, NVT, Tmp1,
3137 DAG.getConstant(MVT::getSizeInBits(NVT) -
3138 MVT::getSizeInBits(OVT), NVT));
3143 case TargetLowering::Expand:
3144 Result = ExpandBitCount(Node->getOpcode(), Tmp1);
3155 Tmp1 = LegalizeOp(Node->getOperand(0));
3156 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
3157 case TargetLowering::Promote:
3158 case TargetLowering::Custom:
3161 case TargetLowering::Legal:
3162 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3164 Tmp1 = TLI.LowerOperation(Result, DAG);
3165 if (Tmp1.Val) Result = Tmp1;
3168 case TargetLowering::Expand:
3169 switch (Node->getOpcode()) {
3170 default: assert(0 && "Unreachable!");
3172 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
3173 Tmp2 = DAG.getConstantFP(-0.0, Node->getValueType(0));
3174 Result = DAG.getNode(ISD::FSUB, Node->getValueType(0), Tmp2, Tmp1);
3177 // Expand Y = FABS(X) -> Y = (X >u 0.0) ? X : fneg(X).
3178 MVT::ValueType VT = Node->getValueType(0);
3179 Tmp2 = DAG.getConstantFP(0.0, VT);
3180 Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), Tmp1, Tmp2, ISD::SETUGT);
3181 Tmp3 = DAG.getNode(ISD::FNEG, VT, Tmp1);
3182 Result = DAG.getNode(ISD::SELECT, VT, Tmp2, Tmp1, Tmp3);
3188 MVT::ValueType VT = Node->getValueType(0);
3190 // Expand unsupported unary vector operators by unrolling them.
3191 if (MVT::isVector(VT)) {
3192 Result = LegalizeOp(UnrollVectorOp(Op));
3196 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
3197 switch(Node->getOpcode()) {
3199 LC = VT == MVT::f32 ? RTLIB::SQRT_F32 :
3200 VT == MVT::f64 ? RTLIB::SQRT_F64 :
3201 VT == MVT::f80 ? RTLIB::SQRT_F80 :
3202 VT == MVT::ppcf128 ? RTLIB::SQRT_PPCF128 :
3203 RTLIB::UNKNOWN_LIBCALL;
3206 LC = VT == MVT::f32 ? RTLIB::SIN_F32 : RTLIB::SIN_F64;
3209 LC = VT == MVT::f32 ? RTLIB::COS_F32 : RTLIB::COS_F64;
3211 default: assert(0 && "Unreachable!");
3214 Result = ExpandLibCall(TLI.getLibcallName(LC), Node,
3215 false/*sign irrelevant*/, Dummy);
3223 MVT::ValueType VT = Node->getValueType(0);
3225 // Expand unsupported unary vector operators by unrolling them.
3226 if (MVT::isVector(VT)) {
3227 Result = LegalizeOp(UnrollVectorOp(Op));
3231 // We always lower FPOWI into a libcall. No target support for it yet.
3233 VT == MVT::f32 ? RTLIB::POWI_F32 :
3234 VT == MVT::f64 ? RTLIB::POWI_F64 :
3235 VT == MVT::f80 ? RTLIB::POWI_F80 :
3236 VT == MVT::ppcf128 ? RTLIB::POWI_PPCF128 :
3237 RTLIB::UNKNOWN_LIBCALL;
3239 Result = ExpandLibCall(TLI.getLibcallName(LC), Node,
3240 false/*sign irrelevant*/, Dummy);
3243 case ISD::BIT_CONVERT:
3244 if (!isTypeLegal(Node->getOperand(0).getValueType())) {
3245 Result = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
3246 } else if (MVT::isVector(Op.getOperand(0).getValueType())) {
3247 // The input has to be a vector type, we have to either scalarize it, pack
3248 // it, or convert it based on whether the input vector type is legal.
3249 SDNode *InVal = Node->getOperand(0).Val;
3250 unsigned NumElems = MVT::getVectorNumElements(InVal->getValueType(0));
3251 MVT::ValueType EVT = MVT::getVectorElementType(InVal->getValueType(0));
3253 // Figure out if there is a simple type corresponding to this Vector
3254 // type. If so, convert to the vector type.
3255 MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
3256 if (TLI.isTypeLegal(TVT)) {
3257 // Turn this into a bit convert of the vector input.
3258 Result = DAG.getNode(ISD::BIT_CONVERT, Node->getValueType(0),
3259 LegalizeOp(Node->getOperand(0)));
3261 } else if (NumElems == 1) {
3262 // Turn this into a bit convert of the scalar input.
3263 Result = DAG.getNode(ISD::BIT_CONVERT, Node->getValueType(0),
3264 ScalarizeVectorOp(Node->getOperand(0)));
3267 // FIXME: UNIMP! Store then reload
3268 assert(0 && "Cast from unsupported vector type not implemented yet!");
3271 switch (TLI.getOperationAction(ISD::BIT_CONVERT,
3272 Node->getOperand(0).getValueType())) {
3273 default: assert(0 && "Unknown operation action!");
3274 case TargetLowering::Expand:
3275 Result = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
3277 case TargetLowering::Legal:
3278 Tmp1 = LegalizeOp(Node->getOperand(0));
3279 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3285 // Conversion operators. The source and destination have different types.
3286 case ISD::SINT_TO_FP:
3287 case ISD::UINT_TO_FP: {
3288 bool isSigned = Node->getOpcode() == ISD::SINT_TO_FP;
3289 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3291 switch (TLI.getOperationAction(Node->getOpcode(),
3292 Node->getOperand(0).getValueType())) {
3293 default: assert(0 && "Unknown operation action!");
3294 case TargetLowering::Custom:
3297 case TargetLowering::Legal:
3298 Tmp1 = LegalizeOp(Node->getOperand(0));
3299 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3301 Tmp1 = TLI.LowerOperation(Result, DAG);
3302 if (Tmp1.Val) Result = Tmp1;
3305 case TargetLowering::Expand:
3306 Result = ExpandLegalINT_TO_FP(isSigned,
3307 LegalizeOp(Node->getOperand(0)),
3308 Node->getValueType(0));
3310 case TargetLowering::Promote:
3311 Result = PromoteLegalINT_TO_FP(LegalizeOp(Node->getOperand(0)),
3312 Node->getValueType(0),
3318 Result = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP,
3319 Node->getValueType(0), Node->getOperand(0));
3322 Tmp1 = PromoteOp(Node->getOperand(0));
3324 Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, Tmp1.getValueType(),
3325 Tmp1, DAG.getValueType(Node->getOperand(0).getValueType()));
3327 Tmp1 = DAG.getZeroExtendInReg(Tmp1,
3328 Node->getOperand(0).getValueType());
3330 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3331 Result = LegalizeOp(Result); // The 'op' is not necessarily legal!
3337 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3339 Tmp1 = LegalizeOp(Node->getOperand(0));
3340 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3343 ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
3345 // Since the result is legal, we should just be able to truncate the low
3346 // part of the source.
3347 Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), Tmp1);
3350 Result = PromoteOp(Node->getOperand(0));
3351 Result = DAG.getNode(ISD::TRUNCATE, Op.getValueType(), Result);
3356 case ISD::FP_TO_SINT:
3357 case ISD::FP_TO_UINT:
3358 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3360 Tmp1 = LegalizeOp(Node->getOperand(0));
3362 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))){
3363 default: assert(0 && "Unknown operation action!");
3364 case TargetLowering::Custom:
3367 case TargetLowering::Legal:
3368 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3370 Tmp1 = TLI.LowerOperation(Result, DAG);
3371 if (Tmp1.Val) Result = Tmp1;
3374 case TargetLowering::Promote:
3375 Result = PromoteLegalFP_TO_INT(Tmp1, Node->getValueType(0),
3376 Node->getOpcode() == ISD::FP_TO_SINT);
3378 case TargetLowering::Expand:
3379 if (Node->getOpcode() == ISD::FP_TO_UINT) {
3380 SDOperand True, False;
3381 MVT::ValueType VT = Node->getOperand(0).getValueType();
3382 MVT::ValueType NVT = Node->getValueType(0);
3383 unsigned ShiftAmt = MVT::getSizeInBits(NVT)-1;
3384 const uint64_t zero[] = {0, 0};
3385 APFloat apf = APFloat(APInt(MVT::getSizeInBits(VT), 2, zero));
3386 uint64_t x = 1ULL << ShiftAmt;
3387 (void)apf.convertFromZeroExtendedInteger
3388 (&x, MVT::getSizeInBits(NVT), false, APFloat::rmNearestTiesToEven);
3389 Tmp2 = DAG.getConstantFP(apf, VT);
3390 Tmp3 = DAG.getSetCC(TLI.getSetCCResultTy(),
3391 Node->getOperand(0), Tmp2, ISD::SETLT);
3392 True = DAG.getNode(ISD::FP_TO_SINT, NVT, Node->getOperand(0));
3393 False = DAG.getNode(ISD::FP_TO_SINT, NVT,
3394 DAG.getNode(ISD::FSUB, VT, Node->getOperand(0),
3396 False = DAG.getNode(ISD::XOR, NVT, False,
3397 DAG.getConstant(1ULL << ShiftAmt, NVT));
3398 Result = DAG.getNode(ISD::SELECT, NVT, Tmp3, True, False);
3401 assert(0 && "Do not know how to expand FP_TO_SINT yet!");
3407 MVT::ValueType VT = Op.getValueType();
3408 MVT::ValueType OVT = Node->getOperand(0).getValueType();
3409 // Convert ppcf128 to i32
3410 if (OVT == MVT::ppcf128 && VT == MVT::i32) {
3411 if (Node->getOpcode()==ISD::FP_TO_SINT)
3412 Result = DAG.getNode(ISD::FP_TO_SINT, VT,
3413 DAG.getNode(ISD::FP_ROUND, MVT::f64,
3414 (DAG.getNode(ISD::FP_ROUND_INREG,
3415 MVT::ppcf128, Node->getOperand(0),
3416 DAG.getValueType(MVT::f64)))));
3418 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
3419 APFloat apf = APFloat(APInt(128, 2, TwoE31));
3420 Tmp2 = DAG.getConstantFP(apf, OVT);
3421 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
3422 // FIXME: generated code sucks.
3423 Result = DAG.getNode(ISD::SELECT_CC, VT, Node->getOperand(0), Tmp2,
3424 DAG.getNode(ISD::ADD, MVT::i32,
3425 DAG.getNode(ISD::FP_TO_SINT, VT,
3426 DAG.getNode(ISD::FSUB, OVT,
3427 Node->getOperand(0), Tmp2)),
3428 DAG.getConstant(0x80000000, MVT::i32)),
3429 DAG.getNode(ISD::FP_TO_SINT, VT,
3430 Node->getOperand(0)),
3431 DAG.getCondCode(ISD::SETGE));
3435 // Convert f32 / f64 to i32 / i64.
3436 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
3437 switch (Node->getOpcode()) {
3438 case ISD::FP_TO_SINT: {
3439 if (OVT == MVT::f32)
3440 LC = (VT == MVT::i32)
3441 ? RTLIB::FPTOSINT_F32_I32 : RTLIB::FPTOSINT_F32_I64;
3442 else if (OVT == MVT::f64)
3443 LC = (VT == MVT::i32)
3444 ? RTLIB::FPTOSINT_F64_I32 : RTLIB::FPTOSINT_F64_I64;
3445 else if (OVT == MVT::f80) {
3446 assert(VT == MVT::i64);
3447 LC = RTLIB::FPTOSINT_F80_I64;
3449 else if (OVT == MVT::ppcf128) {
3450 assert(VT == MVT::i64);
3451 LC = RTLIB::FPTOSINT_PPCF128_I64;
3455 case ISD::FP_TO_UINT: {
3456 if (OVT == MVT::f32)
3457 LC = (VT == MVT::i32)
3458 ? RTLIB::FPTOUINT_F32_I32 : RTLIB::FPTOSINT_F32_I64;
3459 else if (OVT == MVT::f64)
3460 LC = (VT == MVT::i32)
3461 ? RTLIB::FPTOUINT_F64_I32 : RTLIB::FPTOSINT_F64_I64;
3462 else if (OVT == MVT::f80) {
3463 LC = (VT == MVT::i32)
3464 ? RTLIB::FPTOUINT_F80_I32 : RTLIB::FPTOUINT_F80_I64;
3466 else if (OVT == MVT::ppcf128) {
3467 assert(VT == MVT::i64);
3468 LC = RTLIB::FPTOUINT_PPCF128_I64;
3472 default: assert(0 && "Unreachable!");
3475 Result = ExpandLibCall(TLI.getLibcallName(LC), Node,
3476 false/*sign irrelevant*/, Dummy);
3480 Tmp1 = PromoteOp(Node->getOperand(0));
3481 Result = DAG.UpdateNodeOperands(Result, LegalizeOp(Tmp1));
3482 Result = LegalizeOp(Result);
3487 case ISD::FP_EXTEND:
3488 case ISD::FP_ROUND: {
3489 MVT::ValueType newVT = Op.getValueType();
3490 MVT::ValueType oldVT = Op.getOperand(0).getValueType();
3491 if (TLI.getConvertAction(oldVT, newVT) == TargetLowering::Expand) {
3492 if (Node->getOpcode() == ISD::FP_ROUND && oldVT == MVT::ppcf128) {
3494 ExpandOp(Node->getOperand(0), Lo, Hi);
3495 if (newVT == MVT::f64)
3498 Result = DAG.getNode(ISD::FP_ROUND, newVT, Hi);
3501 // The only other way we can lower this is to turn it into a STORE,
3502 // LOAD pair, targetting a temporary location (a stack slot).
3504 // NOTE: there is a choice here between constantly creating new stack
3505 // slots and always reusing the same one. We currently always create
3506 // new ones, as reuse may inhibit scheduling.
3507 MVT::ValueType slotVT =
3508 (Node->getOpcode() == ISD::FP_EXTEND) ? oldVT : newVT;
3509 const Type *Ty = MVT::getTypeForValueType(slotVT);
3510 uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
3511 unsigned Align = TLI.getTargetData()->getPrefTypeAlignment(Ty);
3512 MachineFunction &MF = DAG.getMachineFunction();
3514 MF.getFrameInfo()->CreateStackObject(TySize, Align);
3515 SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
3516 if (Node->getOpcode() == ISD::FP_EXTEND) {
3517 Result = DAG.getStore(DAG.getEntryNode(), Node->getOperand(0),
3518 StackSlot, NULL, 0);
3519 Result = DAG.getExtLoad(ISD::EXTLOAD, newVT,
3520 Result, StackSlot, NULL, 0, oldVT);
3522 Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0),
3523 StackSlot, NULL, 0, newVT);
3524 Result = DAG.getLoad(newVT, Result, StackSlot, NULL, 0);
3531 case ISD::ANY_EXTEND:
3532 case ISD::ZERO_EXTEND:
3533 case ISD::SIGN_EXTEND:
3534 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3535 case Expand: assert(0 && "Shouldn't need to expand other operators here!");
3537 Tmp1 = LegalizeOp(Node->getOperand(0));
3538 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3541 switch (Node->getOpcode()) {
3542 case ISD::ANY_EXTEND:
3543 Tmp1 = PromoteOp(Node->getOperand(0));
3544 Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Tmp1);
3546 case ISD::ZERO_EXTEND:
3547 Result = PromoteOp(Node->getOperand(0));
3548 Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Result);
3549 Result = DAG.getZeroExtendInReg(Result,
3550 Node->getOperand(0).getValueType());
3552 case ISD::SIGN_EXTEND:
3553 Result = PromoteOp(Node->getOperand(0));
3554 Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Result);
3555 Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
3557 DAG.getValueType(Node->getOperand(0).getValueType()));
3559 case ISD::FP_EXTEND:
3560 Result = PromoteOp(Node->getOperand(0));
3561 if (Result.getValueType() != Op.getValueType())
3562 // Dynamically dead while we have only 2 FP types.
3563 Result = DAG.getNode(ISD::FP_EXTEND, Op.getValueType(), Result);
3566 Result = PromoteOp(Node->getOperand(0));
3567 Result = DAG.getNode(Node->getOpcode(), Op.getValueType(), Result);
3572 case ISD::FP_ROUND_INREG:
3573 case ISD::SIGN_EXTEND_INREG: {
3574 Tmp1 = LegalizeOp(Node->getOperand(0));
3575 MVT::ValueType ExtraVT = cast<VTSDNode>(Node->getOperand(1))->getVT();
3577 // If this operation is not supported, convert it to a shl/shr or load/store
3579 switch (TLI.getOperationAction(Node->getOpcode(), ExtraVT)) {
3580 default: assert(0 && "This action not supported for this op yet!");
3581 case TargetLowering::Legal:
3582 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
3584 case TargetLowering::Expand:
3585 // If this is an integer extend and shifts are supported, do that.
3586 if (Node->getOpcode() == ISD::SIGN_EXTEND_INREG) {
3587 // NOTE: we could fall back on load/store here too for targets without
3588 // SAR. However, it is doubtful that any exist.
3589 unsigned BitsDiff = MVT::getSizeInBits(Node->getValueType(0)) -
3590 MVT::getSizeInBits(ExtraVT);
3591 SDOperand ShiftCst = DAG.getConstant(BitsDiff, TLI.getShiftAmountTy());
3592 Result = DAG.getNode(ISD::SHL, Node->getValueType(0),
3593 Node->getOperand(0), ShiftCst);
3594 Result = DAG.getNode(ISD::SRA, Node->getValueType(0),
3596 } else if (Node->getOpcode() == ISD::FP_ROUND_INREG) {
3597 // The only way we can lower this is to turn it into a TRUNCSTORE,
3598 // EXTLOAD pair, targetting a temporary location (a stack slot).
3600 // NOTE: there is a choice here between constantly creating new stack
3601 // slots and always reusing the same one. We currently always create
3602 // new ones, as reuse may inhibit scheduling.
3603 const Type *Ty = MVT::getTypeForValueType(ExtraVT);
3604 uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
3605 unsigned Align = TLI.getTargetData()->getPrefTypeAlignment(Ty);
3606 MachineFunction &MF = DAG.getMachineFunction();
3608 MF.getFrameInfo()->CreateStackObject(TySize, Align);
3609 SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
3610 Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0),
3611 StackSlot, NULL, 0, ExtraVT);
3612 Result = DAG.getExtLoad(ISD::EXTLOAD, Node->getValueType(0),
3613 Result, StackSlot, NULL, 0, ExtraVT);
3615 assert(0 && "Unknown op");
3621 case ISD::TRAMPOLINE: {
3623 for (unsigned i = 0; i != 6; ++i)
3624 Ops[i] = LegalizeOp(Node->getOperand(i));
3625 Result = DAG.UpdateNodeOperands(Result, Ops, 6);
3626 // The only option for this node is to custom lower it.
3627 Result = TLI.LowerOperation(Result, DAG);
3628 assert(Result.Val && "Should always custom lower!");
3630 // Since trampoline produces two values, make sure to remember that we
3631 // legalized both of them.
3632 Tmp1 = LegalizeOp(Result.getValue(1));
3633 Result = LegalizeOp(Result);
3634 AddLegalizedOperand(SDOperand(Node, 0), Result);
3635 AddLegalizedOperand(SDOperand(Node, 1), Tmp1);
3636 return Op.ResNo ? Tmp1 : Result;
3640 assert(Result.getValueType() == Op.getValueType() &&
3641 "Bad legalization!");
3643 // Make sure that the generated code is itself legal.
3645 Result = LegalizeOp(Result);
3647 // Note that LegalizeOp may be reentered even from single-use nodes, which
3648 // means that we always must cache transformed nodes.
3649 AddLegalizedOperand(Op, Result);
3653 /// PromoteOp - Given an operation that produces a value in an invalid type,
3654 /// promote it to compute the value into a larger type. The produced value will
3655 /// have the correct bits for the low portion of the register, but no guarantee
3656 /// is made about the top bits: it may be zero, sign-extended, or garbage.
3657 SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
3658 MVT::ValueType VT = Op.getValueType();
3659 MVT::ValueType NVT = TLI.getTypeToTransformTo(VT);
3660 assert(getTypeAction(VT) == Promote &&
3661 "Caller should expand or legalize operands that are not promotable!");
3662 assert(NVT > VT && MVT::isInteger(NVT) == MVT::isInteger(VT) &&
3663 "Cannot promote to smaller type!");
3665 SDOperand Tmp1, Tmp2, Tmp3;
3667 SDNode *Node = Op.Val;
3669 DenseMap<SDOperand, SDOperand>::iterator I = PromotedNodes.find(Op);
3670 if (I != PromotedNodes.end()) return I->second;
3672 switch (Node->getOpcode()) {
3673 case ISD::CopyFromReg:
3674 assert(0 && "CopyFromReg must be legal!");
3677 cerr << "NODE: "; Node->dump(&DAG); cerr << "\n";
3679 assert(0 && "Do not know how to promote this operator!");
3682 Result = DAG.getNode(ISD::UNDEF, NVT);
3686 Result = DAG.getNode(ISD::SIGN_EXTEND, NVT, Op);
3688 Result = DAG.getNode(ISD::ZERO_EXTEND, NVT, Op);
3689 assert(isa<ConstantSDNode>(Result) && "Didn't constant fold zext?");
3691 case ISD::ConstantFP:
3692 Result = DAG.getNode(ISD::FP_EXTEND, NVT, Op);
3693 assert(isa<ConstantFPSDNode>(Result) && "Didn't constant fold fp_extend?");
3697 assert(isTypeLegal(TLI.getSetCCResultTy()) && "SetCC type is not legal??");
3698 Result = DAG.getNode(ISD::SETCC, TLI.getSetCCResultTy(),Node->getOperand(0),
3699 Node->getOperand(1), Node->getOperand(2));
3703 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3705 Result = LegalizeOp(Node->getOperand(0));
3706 assert(Result.getValueType() >= NVT &&
3707 "This truncation doesn't make sense!");
3708 if (Result.getValueType() > NVT) // Truncate to NVT instead of VT
3709 Result = DAG.getNode(ISD::TRUNCATE, NVT, Result);
3712 // The truncation is not required, because we don't guarantee anything
3713 // about high bits anyway.
3714 Result = PromoteOp(Node->getOperand(0));
3717 ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
3718 // Truncate the low part of the expanded value to the result type
3719 Result = DAG.getNode(ISD::TRUNCATE, NVT, Tmp1);
3722 case ISD::SIGN_EXTEND:
3723 case ISD::ZERO_EXTEND:
3724 case ISD::ANY_EXTEND:
3725 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3726 case Expand: assert(0 && "BUG: Smaller reg should have been promoted!");
3728 // Input is legal? Just do extend all the way to the larger type.
3729 Result = DAG.getNode(Node->getOpcode(), NVT, Node->getOperand(0));
3732 // Promote the reg if it's smaller.
3733 Result = PromoteOp(Node->getOperand(0));
3734 // The high bits are not guaranteed to be anything. Insert an extend.
3735 if (Node->getOpcode() == ISD::SIGN_EXTEND)
3736 Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Result,
3737 DAG.getValueType(Node->getOperand(0).getValueType()));
3738 else if (Node->getOpcode() == ISD::ZERO_EXTEND)
3739 Result = DAG.getZeroExtendInReg(Result,
3740 Node->getOperand(0).getValueType());
3744 case ISD::BIT_CONVERT:
3745 Result = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
3746 Result = PromoteOp(Result);
3749 case ISD::FP_EXTEND:
3750 assert(0 && "Case not implemented. Dynamically dead with 2 FP types!");
3752 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3753 case Expand: assert(0 && "BUG: Cannot expand FP regs!");
3754 case Promote: assert(0 && "Unreachable with 2 FP types!");
3756 // Input is legal? Do an FP_ROUND_INREG.
3757 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Node->getOperand(0),
3758 DAG.getValueType(VT));
3763 case ISD::SINT_TO_FP:
3764 case ISD::UINT_TO_FP:
3765 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3767 // No extra round required here.
3768 Result = DAG.getNode(Node->getOpcode(), NVT, Node->getOperand(0));
3772 Result = PromoteOp(Node->getOperand(0));
3773 if (Node->getOpcode() == ISD::SINT_TO_FP)
3774 Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
3776 DAG.getValueType(Node->getOperand(0).getValueType()));
3778 Result = DAG.getZeroExtendInReg(Result,
3779 Node->getOperand(0).getValueType());
3780 // No extra round required here.
3781 Result = DAG.getNode(Node->getOpcode(), NVT, Result);
3784 Result = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP, NVT,
3785 Node->getOperand(0));
3786 // Round if we cannot tolerate excess precision.
3787 if (NoExcessFPPrecision)
3788 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3789 DAG.getValueType(VT));
3794 case ISD::SIGN_EXTEND_INREG:
3795 Result = PromoteOp(Node->getOperand(0));
3796 Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Result,
3797 Node->getOperand(1));
3799 case ISD::FP_TO_SINT:
3800 case ISD::FP_TO_UINT:
3801 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3804 Tmp1 = Node->getOperand(0);
3807 // The input result is prerounded, so we don't have to do anything
3809 Tmp1 = PromoteOp(Node->getOperand(0));
3812 // If we're promoting a UINT to a larger size, check to see if the new node
3813 // will be legal. If it isn't, check to see if FP_TO_SINT is legal, since
3814 // we can use that instead. This allows us to generate better code for
3815 // FP_TO_UINT for small destination sizes on targets where FP_TO_UINT is not
3816 // legal, such as PowerPC.
3817 if (Node->getOpcode() == ISD::FP_TO_UINT &&
3818 !TLI.isOperationLegal(ISD::FP_TO_UINT, NVT) &&
3819 (TLI.isOperationLegal(ISD::FP_TO_SINT, NVT) ||
3820 TLI.getOperationAction(ISD::FP_TO_SINT, NVT)==TargetLowering::Custom)){
3821 Result = DAG.getNode(ISD::FP_TO_SINT, NVT, Tmp1);
3823 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
3829 Tmp1 = PromoteOp(Node->getOperand(0));
3830 assert(Tmp1.getValueType() == NVT);
3831 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
3832 // NOTE: we do not have to do any extra rounding here for
3833 // NoExcessFPPrecision, because we know the input will have the appropriate
3834 // precision, and these operations don't modify precision at all.
3840 Tmp1 = PromoteOp(Node->getOperand(0));
3841 assert(Tmp1.getValueType() == NVT);
3842 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
3843 if (NoExcessFPPrecision)
3844 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3845 DAG.getValueType(VT));
3849 // Promote f32 powi to f64 powi. Note that this could insert a libcall
3850 // directly as well, which may be better.
3851 Tmp1 = PromoteOp(Node->getOperand(0));
3852 assert(Tmp1.getValueType() == NVT);
3853 Result = DAG.getNode(ISD::FPOWI, NVT, Tmp1, Node->getOperand(1));
3854 if (NoExcessFPPrecision)
3855 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3856 DAG.getValueType(VT));
3866 // The input may have strange things in the top bits of the registers, but
3867 // these operations don't care. They may have weird bits going out, but
3868 // that too is okay if they are integer operations.
3869 Tmp1 = PromoteOp(Node->getOperand(0));
3870 Tmp2 = PromoteOp(Node->getOperand(1));
3871 assert(Tmp1.getValueType() == NVT && Tmp2.getValueType() == NVT);
3872 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
3877 Tmp1 = PromoteOp(Node->getOperand(0));
3878 Tmp2 = PromoteOp(Node->getOperand(1));
3879 assert(Tmp1.getValueType() == NVT && Tmp2.getValueType() == NVT);
3880 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
3882 // Floating point operations will give excess precision that we may not be
3883 // able to tolerate. If we DO allow excess precision, just leave it,
3884 // otherwise excise it.
3885 // FIXME: Why would we need to round FP ops more than integer ones?
3886 // Is Round(Add(Add(A,B),C)) != Round(Add(Round(Add(A,B)), C))
3887 if (NoExcessFPPrecision)
3888 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3889 DAG.getValueType(VT));
3894 // These operators require that their input be sign extended.
3895 Tmp1 = PromoteOp(Node->getOperand(0));
3896 Tmp2 = PromoteOp(Node->getOperand(1));
3897 if (MVT::isInteger(NVT)) {
3898 Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp1,
3899 DAG.getValueType(VT));
3900 Tmp2 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp2,
3901 DAG.getValueType(VT));
3903 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
3905 // Perform FP_ROUND: this is probably overly pessimistic.
3906 if (MVT::isFloatingPoint(NVT) && NoExcessFPPrecision)
3907 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3908 DAG.getValueType(VT));
3912 case ISD::FCOPYSIGN:
3913 // These operators require that their input be fp extended.
3914 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3916 Tmp1 = LegalizeOp(Node->getOperand(0));
3919 Tmp1 = PromoteOp(Node->getOperand(0));
3922 assert(0 && "not implemented");
3924 switch (getTypeAction(Node->getOperand(1).getValueType())) {
3926 Tmp2 = LegalizeOp(Node->getOperand(1));
3929 Tmp2 = PromoteOp(Node->getOperand(1));
3932 assert(0 && "not implemented");
3934 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
3936 // Perform FP_ROUND: this is probably overly pessimistic.
3937 if (NoExcessFPPrecision && Node->getOpcode() != ISD::FCOPYSIGN)
3938 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3939 DAG.getValueType(VT));
3944 // These operators require that their input be zero extended.
3945 Tmp1 = PromoteOp(Node->getOperand(0));
3946 Tmp2 = PromoteOp(Node->getOperand(1));
3947 assert(MVT::isInteger(NVT) && "Operators don't apply to FP!");
3948 Tmp1 = DAG.getZeroExtendInReg(Tmp1, VT);
3949 Tmp2 = DAG.getZeroExtendInReg(Tmp2, VT);
3950 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
3954 Tmp1 = PromoteOp(Node->getOperand(0));
3955 Result = DAG.getNode(ISD::SHL, NVT, Tmp1, Node->getOperand(1));
3958 // The input value must be properly sign extended.
3959 Tmp1 = PromoteOp(Node->getOperand(0));
3960 Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp1,
3961 DAG.getValueType(VT));
3962 Result = DAG.getNode(ISD::SRA, NVT, Tmp1, Node->getOperand(1));
3965 // The input value must be properly zero extended.
3966 Tmp1 = PromoteOp(Node->getOperand(0));
3967 Tmp1 = DAG.getZeroExtendInReg(Tmp1, VT);
3968 Result = DAG.getNode(ISD::SRL, NVT, Tmp1, Node->getOperand(1));
3972 Tmp1 = Node->getOperand(0); // Get the chain.
3973 Tmp2 = Node->getOperand(1); // Get the pointer.
3974 if (TLI.getOperationAction(ISD::VAARG, VT) == TargetLowering::Custom) {
3975 Tmp3 = DAG.getVAArg(VT, Tmp1, Tmp2, Node->getOperand(2));
3976 Result = TLI.CustomPromoteOperation(Tmp3, DAG);
3978 SrcValueSDNode *SV = cast<SrcValueSDNode>(Node->getOperand(2));
3979 SDOperand VAList = DAG.getLoad(TLI.getPointerTy(), Tmp1, Tmp2,
3980 SV->getValue(), SV->getOffset());
3981 // Increment the pointer, VAList, to the next vaarg
3982 Tmp3 = DAG.getNode(ISD::ADD, TLI.getPointerTy(), VAList,
3983 DAG.getConstant(MVT::getSizeInBits(VT)/8,
3984 TLI.getPointerTy()));
3985 // Store the incremented VAList to the legalized pointer
3986 Tmp3 = DAG.getStore(VAList.getValue(1), Tmp3, Tmp2, SV->getValue(),
3988 // Load the actual argument out of the pointer VAList
3989 Result = DAG.getExtLoad(ISD::EXTLOAD, NVT, Tmp3, VAList, NULL, 0, VT);
3991 // Remember that we legalized the chain.
3992 AddLegalizedOperand(Op.getValue(1), LegalizeOp(Result.getValue(1)));
3996 LoadSDNode *LD = cast<LoadSDNode>(Node);
3997 ISD::LoadExtType ExtType = ISD::isNON_EXTLoad(Node)
3998 ? ISD::EXTLOAD : LD->getExtensionType();
3999 Result = DAG.getExtLoad(ExtType, NVT,
4000 LD->getChain(), LD->getBasePtr(),
4001 LD->getSrcValue(), LD->getSrcValueOffset(),
4004 LD->getAlignment());
4005 // Remember that we legalized the chain.
4006 AddLegalizedOperand(Op.getValue(1), LegalizeOp(Result.getValue(1)));
4010 Tmp2 = PromoteOp(Node->getOperand(1)); // Legalize the op0
4011 Tmp3 = PromoteOp(Node->getOperand(2)); // Legalize the op1
4012 Result = DAG.getNode(ISD::SELECT, NVT, Node->getOperand(0), Tmp2, Tmp3);
4014 case ISD::SELECT_CC:
4015 Tmp2 = PromoteOp(Node->getOperand(2)); // True
4016 Tmp3 = PromoteOp(Node->getOperand(3)); // False
4017 Result = DAG.getNode(ISD::SELECT_CC, NVT, Node->getOperand(0),
4018 Node->getOperand(1), Tmp2, Tmp3, Node->getOperand(4));
4021 Tmp1 = Node->getOperand(0);
4022 Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Tmp1);
4023 Tmp1 = DAG.getNode(ISD::BSWAP, NVT, Tmp1);
4024 Result = DAG.getNode(ISD::SRL, NVT, Tmp1,
4025 DAG.getConstant(MVT::getSizeInBits(NVT) -
4026 MVT::getSizeInBits(VT),
4027 TLI.getShiftAmountTy()));
4032 // Zero extend the argument
4033 Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Node->getOperand(0));
4034 // Perform the larger operation, then subtract if needed.
4035 Tmp1 = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
4036 switch(Node->getOpcode()) {
4041 // if Tmp1 == sizeinbits(NVT) then Tmp1 = sizeinbits(Old VT)
4042 Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), Tmp1,
4043 DAG.getConstant(MVT::getSizeInBits(NVT), NVT),
4045 Result = DAG.getNode(ISD::SELECT, NVT, Tmp2,
4046 DAG.getConstant(MVT::getSizeInBits(VT), NVT), Tmp1);
4049 //Tmp1 = Tmp1 - (sizeinbits(NVT) - sizeinbits(Old VT))
4050 Result = DAG.getNode(ISD::SUB, NVT, Tmp1,
4051 DAG.getConstant(MVT::getSizeInBits(NVT) -
4052 MVT::getSizeInBits(VT), NVT));
4056 case ISD::EXTRACT_SUBVECTOR:
4057 Result = PromoteOp(ExpandEXTRACT_SUBVECTOR(Op));
4059 case ISD::EXTRACT_VECTOR_ELT:
4060 Result = PromoteOp(ExpandEXTRACT_VECTOR_ELT(Op));
4064 assert(Result.Val && "Didn't set a result!");
4066 // Make sure the result is itself legal.
4067 Result = LegalizeOp(Result);
4069 // Remember that we promoted this!
4070 AddPromotedOperand(Op, Result);
4074 /// ExpandEXTRACT_VECTOR_ELT - Expand an EXTRACT_VECTOR_ELT operation into
4075 /// a legal EXTRACT_VECTOR_ELT operation, scalar code, or memory traffic,
4076 /// based on the vector type. The return type of this matches the element type
4077 /// of the vector, which may not be legal for the target.
4078 SDOperand SelectionDAGLegalize::ExpandEXTRACT_VECTOR_ELT(SDOperand Op) {
4079 // We know that operand #0 is the Vec vector. If the index is a constant
4080 // or if the invec is a supported hardware type, we can use it. Otherwise,
4081 // lower to a store then an indexed load.
4082 SDOperand Vec = Op.getOperand(0);
4083 SDOperand Idx = Op.getOperand(1);
4085 MVT::ValueType TVT = Vec.getValueType();
4086 unsigned NumElems = MVT::getVectorNumElements(TVT);
4088 switch (TLI.getOperationAction(ISD::EXTRACT_VECTOR_ELT, TVT)) {
4089 default: assert(0 && "This action is not supported yet!");
4090 case TargetLowering::Custom: {
4091 Vec = LegalizeOp(Vec);
4092 Op = DAG.UpdateNodeOperands(Op, Vec, Idx);
4093 SDOperand Tmp3 = TLI.LowerOperation(Op, DAG);
4098 case TargetLowering::Legal:
4099 if (isTypeLegal(TVT)) {
4100 Vec = LegalizeOp(Vec);
4101 Op = DAG.UpdateNodeOperands(Op, Vec, Idx);
4105 case TargetLowering::Expand:
4109 if (NumElems == 1) {
4110 // This must be an access of the only element. Return it.
4111 Op = ScalarizeVectorOp(Vec);
4112 } else if (!TLI.isTypeLegal(TVT) && isa<ConstantSDNode>(Idx)) {
4113 ConstantSDNode *CIdx = cast<ConstantSDNode>(Idx);
4115 SplitVectorOp(Vec, Lo, Hi);
4116 if (CIdx->getValue() < NumElems/2) {
4120 Idx = DAG.getConstant(CIdx->getValue() - NumElems/2,
4121 Idx.getValueType());
4124 // It's now an extract from the appropriate high or low part. Recurse.
4125 Op = DAG.UpdateNodeOperands(Op, Vec, Idx);
4126 Op = ExpandEXTRACT_VECTOR_ELT(Op);
4128 // Store the value to a temporary stack slot, then LOAD the scalar
4129 // element back out.
4130 SDOperand StackPtr = DAG.CreateStackTemporary(Vec.getValueType());
4131 SDOperand Ch = DAG.getStore(DAG.getEntryNode(), Vec, StackPtr, NULL, 0);
4133 // Add the offset to the index.
4134 unsigned EltSize = MVT::getSizeInBits(Op.getValueType())/8;
4135 Idx = DAG.getNode(ISD::MUL, Idx.getValueType(), Idx,
4136 DAG.getConstant(EltSize, Idx.getValueType()));
4138 if (MVT::getSizeInBits(Idx.getValueType()) >
4139 MVT::getSizeInBits(TLI.getPointerTy()))
4140 Idx = DAG.getNode(ISD::TRUNCATE, TLI.getPointerTy(), StackPtr);
4142 Idx = DAG.getNode(ISD::ZERO_EXTEND, TLI.getPointerTy(), StackPtr);
4144 StackPtr = DAG.getNode(ISD::ADD, Idx.getValueType(), Idx, StackPtr);
4146 Op = DAG.getLoad(Op.getValueType(), Ch, StackPtr, NULL, 0);
4151 /// ExpandEXTRACT_SUBVECTOR - Expand a EXTRACT_SUBVECTOR operation. For now
4152 /// we assume the operation can be split if it is not already legal.
4153 SDOperand SelectionDAGLegalize::ExpandEXTRACT_SUBVECTOR(SDOperand Op) {
4154 // We know that operand #0 is the Vec vector. For now we assume the index
4155 // is a constant and that the extracted result is a supported hardware type.
4156 SDOperand Vec = Op.getOperand(0);
4157 SDOperand Idx = LegalizeOp(Op.getOperand(1));
4159 unsigned NumElems = MVT::getVectorNumElements(Vec.getValueType());
4161 if (NumElems == MVT::getVectorNumElements(Op.getValueType())) {
4162 // This must be an access of the desired vector length. Return it.
4166 ConstantSDNode *CIdx = cast<ConstantSDNode>(Idx);
4168 SplitVectorOp(Vec, Lo, Hi);
4169 if (CIdx->getValue() < NumElems/2) {
4173 Idx = DAG.getConstant(CIdx->getValue() - NumElems/2, Idx.getValueType());
4176 // It's now an extract from the appropriate high or low part. Recurse.
4177 Op = DAG.UpdateNodeOperands(Op, Vec, Idx);
4178 return ExpandEXTRACT_SUBVECTOR(Op);
4181 /// LegalizeSetCCOperands - Attempts to create a legal LHS and RHS for a SETCC
4182 /// with condition CC on the current target. This usually involves legalizing
4183 /// or promoting the arguments. In the case where LHS and RHS must be expanded,
4184 /// there may be no choice but to create a new SetCC node to represent the
4185 /// legalized value of setcc lhs, rhs. In this case, the value is returned in
4186 /// LHS, and the SDOperand returned in RHS has a nil SDNode value.
4187 void SelectionDAGLegalize::LegalizeSetCCOperands(SDOperand &LHS,
4190 SDOperand Tmp1, Tmp2, Tmp3, Result;
4192 switch (getTypeAction(LHS.getValueType())) {
4194 Tmp1 = LegalizeOp(LHS); // LHS
4195 Tmp2 = LegalizeOp(RHS); // RHS
4198 Tmp1 = PromoteOp(LHS); // LHS
4199 Tmp2 = PromoteOp(RHS); // RHS
4201 // If this is an FP compare, the operands have already been extended.
4202 if (MVT::isInteger(LHS.getValueType())) {
4203 MVT::ValueType VT = LHS.getValueType();
4204 MVT::ValueType NVT = TLI.getTypeToTransformTo(VT);
4206 // Otherwise, we have to insert explicit sign or zero extends. Note
4207 // that we could insert sign extends for ALL conditions, but zero extend
4208 // is cheaper on many machines (an AND instead of two shifts), so prefer
4210 switch (cast<CondCodeSDNode>(CC)->get()) {
4211 default: assert(0 && "Unknown integer comparison!");
4218 // ALL of these operations will work if we either sign or zero extend
4219 // the operands (including the unsigned comparisons!). Zero extend is
4220 // usually a simpler/cheaper operation, so prefer it.
4221 Tmp1 = DAG.getZeroExtendInReg(Tmp1, VT);
4222 Tmp2 = DAG.getZeroExtendInReg(Tmp2, VT);
4228 Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp1,
4229 DAG.getValueType(VT));
4230 Tmp2 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp2,
4231 DAG.getValueType(VT));
4237 MVT::ValueType VT = LHS.getValueType();
4238 if (VT == MVT::f32 || VT == MVT::f64) {
4239 // Expand into one or more soft-fp libcall(s).
4240 RTLIB::Libcall LC1, LC2 = RTLIB::UNKNOWN_LIBCALL;
4241 switch (cast<CondCodeSDNode>(CC)->get()) {
4244 LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
4248 LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
4252 LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
4256 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
4260 LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
4264 LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
4267 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
4270 LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
4273 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
4274 switch (cast<CondCodeSDNode>(CC)->get()) {
4276 // SETONE = SETOLT | SETOGT
4277 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
4280 LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
4283 LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
4286 LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
4289 LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
4292 LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
4294 default: assert(0 && "Unsupported FP setcc!");
4299 Tmp1 = ExpandLibCall(TLI.getLibcallName(LC1),
4300 DAG.getNode(ISD::MERGE_VALUES, VT, LHS, RHS).Val,
4301 false /*sign irrelevant*/, Dummy);
4302 Tmp2 = DAG.getConstant(0, MVT::i32);
4303 CC = DAG.getCondCode(TLI.getCmpLibcallCC(LC1));
4304 if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
4305 Tmp1 = DAG.getNode(ISD::SETCC, TLI.getSetCCResultTy(), Tmp1, Tmp2, CC);
4306 LHS = ExpandLibCall(TLI.getLibcallName(LC2),
4307 DAG.getNode(ISD::MERGE_VALUES, VT, LHS, RHS).Val,
4308 false /*sign irrelevant*/, Dummy);
4309 Tmp2 = DAG.getNode(ISD::SETCC, TLI.getSetCCResultTy(), LHS, Tmp2,
4310 DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
4311 Tmp1 = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp2);
4319 SDOperand LHSLo, LHSHi, RHSLo, RHSHi;
4320 ExpandOp(LHS, LHSLo, LHSHi);
4321 ExpandOp(RHS, RHSLo, RHSHi);
4322 ISD::CondCode CCCode = cast<CondCodeSDNode>(CC)->get();
4324 if (VT==MVT::ppcf128) {
4325 // FIXME: This generated code sucks. We want to generate
4326 // FCMP crN, hi1, hi2
4328 // FCMP crN, lo1, lo2
4329 // The following can be improved, but not that much.
4330 Tmp1 = DAG.getSetCC(TLI.getSetCCResultTy(), LHSHi, RHSHi, ISD::SETEQ);
4331 Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), LHSLo, RHSLo, CCCode);
4332 Tmp3 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
4333 Tmp1 = DAG.getSetCC(TLI.getSetCCResultTy(), LHSHi, RHSHi, ISD::SETNE);
4334 Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), LHSHi, RHSHi, CCCode);
4335 Tmp1 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
4336 Tmp1 = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp3);
4345 if (ConstantSDNode *RHSCST = dyn_cast<ConstantSDNode>(RHSLo))
4346 if (RHSCST->isAllOnesValue()) {
4347 // Comparison to -1.
4348 Tmp1 = DAG.getNode(ISD::AND, LHSLo.getValueType(), LHSLo, LHSHi);
4353 Tmp1 = DAG.getNode(ISD::XOR, LHSLo.getValueType(), LHSLo, RHSLo);
4354 Tmp2 = DAG.getNode(ISD::XOR, LHSLo.getValueType(), LHSHi, RHSHi);
4355 Tmp1 = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp2);
4356 Tmp2 = DAG.getConstant(0, Tmp1.getValueType());
4359 // If this is a comparison of the sign bit, just look at the top part.
4361 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(RHS))
4362 if ((cast<CondCodeSDNode>(CC)->get() == ISD::SETLT &&
4363 CST->getValue() == 0) || // X < 0
4364 (cast<CondCodeSDNode>(CC)->get() == ISD::SETGT &&
4365 CST->isAllOnesValue())) { // X > -1
4371 // FIXME: This generated code sucks.
4372 ISD::CondCode LowCC;
4374 default: assert(0 && "Unknown integer setcc!");
4376 case ISD::SETULT: LowCC = ISD::SETULT; break;
4378 case ISD::SETUGT: LowCC = ISD::SETUGT; break;
4380 case ISD::SETULE: LowCC = ISD::SETULE; break;
4382 case ISD::SETUGE: LowCC = ISD::SETUGE; break;
4385 // Tmp1 = lo(op1) < lo(op2) // Always unsigned comparison
4386 // Tmp2 = hi(op1) < hi(op2) // Signedness depends on operands
4387 // dest = hi(op1) == hi(op2) ? Tmp1 : Tmp2;
4389 // NOTE: on targets without efficient SELECT of bools, we can always use
4390 // this identity: (B1 ? B2 : B3) --> (B1 & B2)|(!B1&B3)
4391 TargetLowering::DAGCombinerInfo DagCombineInfo(DAG, false, true, NULL);
4392 Tmp1 = TLI.SimplifySetCC(TLI.getSetCCResultTy(), LHSLo, RHSLo, LowCC,
4393 false, DagCombineInfo);
4395 Tmp1 = DAG.getSetCC(TLI.getSetCCResultTy(), LHSLo, RHSLo, LowCC);
4396 Tmp2 = TLI.SimplifySetCC(TLI.getSetCCResultTy(), LHSHi, RHSHi,
4397 CCCode, false, DagCombineInfo);
4399 Tmp2 = DAG.getNode(ISD::SETCC, TLI.getSetCCResultTy(), LHSHi, RHSHi,CC);
4401 ConstantSDNode *Tmp1C = dyn_cast<ConstantSDNode>(Tmp1.Val);
4402 ConstantSDNode *Tmp2C = dyn_cast<ConstantSDNode>(Tmp2.Val);
4403 if ((Tmp1C && Tmp1C->getValue() == 0) ||
4404 (Tmp2C && Tmp2C->getValue() == 0 &&
4405 (CCCode == ISD::SETLE || CCCode == ISD::SETGE ||
4406 CCCode == ISD::SETUGE || CCCode == ISD::SETULE)) ||
4407 (Tmp2C && Tmp2C->getValue() == 1 &&
4408 (CCCode == ISD::SETLT || CCCode == ISD::SETGT ||
4409 CCCode == ISD::SETUGT || CCCode == ISD::SETULT))) {
4410 // low part is known false, returns high part.
4411 // For LE / GE, if high part is known false, ignore the low part.
4412 // For LT / GT, if high part is known true, ignore the low part.
4416 Result = TLI.SimplifySetCC(TLI.getSetCCResultTy(), LHSHi, RHSHi,
4417 ISD::SETEQ, false, DagCombineInfo);
4419 Result=DAG.getSetCC(TLI.getSetCCResultTy(), LHSHi, RHSHi, ISD::SETEQ);
4420 Result = LegalizeOp(DAG.getNode(ISD::SELECT, Tmp1.getValueType(),
4421 Result, Tmp1, Tmp2));
4432 /// ExpandBIT_CONVERT - Expand a BIT_CONVERT node into a store/load combination.
4433 /// The resultant code need not be legal. Note that SrcOp is the input operand
4434 /// to the BIT_CONVERT, not the BIT_CONVERT node itself.
4435 SDOperand SelectionDAGLegalize::ExpandBIT_CONVERT(MVT::ValueType DestVT,
4437 // Create the stack frame object.
4438 SDOperand FIPtr = DAG.CreateStackTemporary(DestVT);
4440 // Emit a store to the stack slot.
4441 SDOperand Store = DAG.getStore(DAG.getEntryNode(), SrcOp, FIPtr, NULL, 0);
4442 // Result is a load from the stack slot.
4443 return DAG.getLoad(DestVT, Store, FIPtr, NULL, 0);
4446 SDOperand SelectionDAGLegalize::ExpandSCALAR_TO_VECTOR(SDNode *Node) {
4447 // Create a vector sized/aligned stack slot, store the value to element #0,
4448 // then load the whole vector back out.
4449 SDOperand StackPtr = DAG.CreateStackTemporary(Node->getValueType(0));
4450 SDOperand Ch = DAG.getStore(DAG.getEntryNode(), Node->getOperand(0), StackPtr,
4452 return DAG.getLoad(Node->getValueType(0), Ch, StackPtr, NULL, 0);
4456 /// ExpandBUILD_VECTOR - Expand a BUILD_VECTOR node on targets that don't
4457 /// support the operation, but do support the resultant vector type.
4458 SDOperand SelectionDAGLegalize::ExpandBUILD_VECTOR(SDNode *Node) {
4460 // If the only non-undef value is the low element, turn this into a
4461 // SCALAR_TO_VECTOR node. If this is { X, X, X, X }, determine X.
4462 unsigned NumElems = Node->getNumOperands();
4463 bool isOnlyLowElement = true;
4464 SDOperand SplatValue = Node->getOperand(0);
4465 std::map<SDOperand, std::vector<unsigned> > Values;
4466 Values[SplatValue].push_back(0);
4467 bool isConstant = true;
4468 if (!isa<ConstantFPSDNode>(SplatValue) && !isa<ConstantSDNode>(SplatValue) &&
4469 SplatValue.getOpcode() != ISD::UNDEF)
4472 for (unsigned i = 1; i < NumElems; ++i) {
4473 SDOperand V = Node->getOperand(i);
4474 Values[V].push_back(i);
4475 if (V.getOpcode() != ISD::UNDEF)
4476 isOnlyLowElement = false;
4477 if (SplatValue != V)
4478 SplatValue = SDOperand(0,0);
4480 // If this isn't a constant element or an undef, we can't use a constant
4482 if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V) &&
4483 V.getOpcode() != ISD::UNDEF)
4487 if (isOnlyLowElement) {
4488 // If the low element is an undef too, then this whole things is an undef.
4489 if (Node->getOperand(0).getOpcode() == ISD::UNDEF)
4490 return DAG.getNode(ISD::UNDEF, Node->getValueType(0));
4491 // Otherwise, turn this into a scalar_to_vector node.
4492 return DAG.getNode(ISD::SCALAR_TO_VECTOR, Node->getValueType(0),
4493 Node->getOperand(0));
4496 // If all elements are constants, create a load from the constant pool.
4498 MVT::ValueType VT = Node->getValueType(0);
4500 MVT::getTypeForValueType(Node->getOperand(0).getValueType());
4501 std::vector<Constant*> CV;
4502 for (unsigned i = 0, e = NumElems; i != e; ++i) {
4503 if (ConstantFPSDNode *V =
4504 dyn_cast<ConstantFPSDNode>(Node->getOperand(i))) {
4505 CV.push_back(ConstantFP::get(OpNTy, V->getValueAPF()));
4506 } else if (ConstantSDNode *V =
4507 dyn_cast<ConstantSDNode>(Node->getOperand(i))) {
4508 CV.push_back(ConstantInt::get(OpNTy, V->getValue()));
4510 assert(Node->getOperand(i).getOpcode() == ISD::UNDEF);
4511 CV.push_back(UndefValue::get(OpNTy));
4514 Constant *CP = ConstantVector::get(CV);
4515 SDOperand CPIdx = DAG.getConstantPool(CP, TLI.getPointerTy());
4516 return DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, NULL, 0);
4519 if (SplatValue.Val) { // Splat of one value?
4520 // Build the shuffle constant vector: <0, 0, 0, 0>
4521 MVT::ValueType MaskVT =
4522 MVT::getIntVectorWithNumElements(NumElems);
4523 SDOperand Zero = DAG.getConstant(0, MVT::getVectorElementType(MaskVT));
4524 std::vector<SDOperand> ZeroVec(NumElems, Zero);
4525 SDOperand SplatMask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
4526 &ZeroVec[0], ZeroVec.size());
4528 // If the target supports VECTOR_SHUFFLE and this shuffle mask, use it.
4529 if (isShuffleLegal(Node->getValueType(0), SplatMask)) {
4530 // Get the splatted value into the low element of a vector register.
4531 SDOperand LowValVec =
4532 DAG.getNode(ISD::SCALAR_TO_VECTOR, Node->getValueType(0), SplatValue);
4534 // Return shuffle(LowValVec, undef, <0,0,0,0>)
4535 return DAG.getNode(ISD::VECTOR_SHUFFLE, Node->getValueType(0), LowValVec,
4536 DAG.getNode(ISD::UNDEF, Node->getValueType(0)),
4541 // If there are only two unique elements, we may be able to turn this into a
4543 if (Values.size() == 2) {
4544 // Build the shuffle constant vector: e.g. <0, 4, 0, 4>
4545 MVT::ValueType MaskVT =
4546 MVT::getIntVectorWithNumElements(NumElems);
4547 std::vector<SDOperand> MaskVec(NumElems);
4549 for (std::map<SDOperand,std::vector<unsigned> >::iterator I=Values.begin(),
4550 E = Values.end(); I != E; ++I) {
4551 for (std::vector<unsigned>::iterator II = I->second.begin(),
4552 EE = I->second.end(); II != EE; ++II)
4553 MaskVec[*II] = DAG.getConstant(i, MVT::getVectorElementType(MaskVT));
4556 SDOperand ShuffleMask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
4557 &MaskVec[0], MaskVec.size());
4559 // If the target supports VECTOR_SHUFFLE and this shuffle mask, use it.
4560 if (TLI.isOperationLegal(ISD::SCALAR_TO_VECTOR, Node->getValueType(0)) &&
4561 isShuffleLegal(Node->getValueType(0), ShuffleMask)) {
4562 SmallVector<SDOperand, 8> Ops;
4563 for(std::map<SDOperand,std::vector<unsigned> >::iterator I=Values.begin(),
4564 E = Values.end(); I != E; ++I) {
4565 SDOperand Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, Node->getValueType(0),
4569 Ops.push_back(ShuffleMask);
4571 // Return shuffle(LoValVec, HiValVec, <0,1,0,1>)
4572 return DAG.getNode(ISD::VECTOR_SHUFFLE, Node->getValueType(0),
4573 &Ops[0], Ops.size());
4577 // Otherwise, we can't handle this case efficiently. Allocate a sufficiently
4578 // aligned object on the stack, store each element into it, then load
4579 // the result as a vector.
4580 MVT::ValueType VT = Node->getValueType(0);
4581 // Create the stack frame object.
4582 SDOperand FIPtr = DAG.CreateStackTemporary(VT);
4584 // Emit a store of each element to the stack slot.
4585 SmallVector<SDOperand, 8> Stores;
4586 unsigned TypeByteSize =
4587 MVT::getSizeInBits(Node->getOperand(0).getValueType())/8;
4588 // Store (in the right endianness) the elements to memory.
4589 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
4590 // Ignore undef elements.
4591 if (Node->getOperand(i).getOpcode() == ISD::UNDEF) continue;
4593 unsigned Offset = TypeByteSize*i;
4595 SDOperand Idx = DAG.getConstant(Offset, FIPtr.getValueType());
4596 Idx = DAG.getNode(ISD::ADD, FIPtr.getValueType(), FIPtr, Idx);
4598 Stores.push_back(DAG.getStore(DAG.getEntryNode(), Node->getOperand(i), Idx,
4602 SDOperand StoreChain;
4603 if (!Stores.empty()) // Not all undef elements?
4604 StoreChain = DAG.getNode(ISD::TokenFactor, MVT::Other,
4605 &Stores[0], Stores.size());
4607 StoreChain = DAG.getEntryNode();
4609 // Result is a load from the stack slot.
4610 return DAG.getLoad(VT, StoreChain, FIPtr, NULL, 0);
4613 void SelectionDAGLegalize::ExpandShiftParts(unsigned NodeOp,
4614 SDOperand Op, SDOperand Amt,
4615 SDOperand &Lo, SDOperand &Hi) {
4616 // Expand the subcomponents.
4617 SDOperand LHSL, LHSH;
4618 ExpandOp(Op, LHSL, LHSH);
4620 SDOperand Ops[] = { LHSL, LHSH, Amt };
4621 MVT::ValueType VT = LHSL.getValueType();
4622 Lo = DAG.getNode(NodeOp, DAG.getNodeValueTypes(VT, VT), 2, Ops, 3);
4623 Hi = Lo.getValue(1);
4627 /// ExpandShift - Try to find a clever way to expand this shift operation out to
4628 /// smaller elements. If we can't find a way that is more efficient than a
4629 /// libcall on this target, return false. Otherwise, return true with the
4630 /// low-parts expanded into Lo and Hi.
4631 bool SelectionDAGLegalize::ExpandShift(unsigned Opc, SDOperand Op,SDOperand Amt,
4632 SDOperand &Lo, SDOperand &Hi) {
4633 assert((Opc == ISD::SHL || Opc == ISD::SRA || Opc == ISD::SRL) &&
4634 "This is not a shift!");
4636 MVT::ValueType NVT = TLI.getTypeToTransformTo(Op.getValueType());
4637 SDOperand ShAmt = LegalizeOp(Amt);
4638 MVT::ValueType ShTy = ShAmt.getValueType();
4639 unsigned VTBits = MVT::getSizeInBits(Op.getValueType());
4640 unsigned NVTBits = MVT::getSizeInBits(NVT);
4642 // Handle the case when Amt is an immediate.
4643 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Amt.Val)) {
4644 unsigned Cst = CN->getValue();
4645 // Expand the incoming operand to be shifted, so that we have its parts
4647 ExpandOp(Op, InL, InH);
4651 Lo = DAG.getConstant(0, NVT);
4652 Hi = DAG.getConstant(0, NVT);
4653 } else if (Cst > NVTBits) {
4654 Lo = DAG.getConstant(0, NVT);
4655 Hi = DAG.getNode(ISD::SHL, NVT, InL, DAG.getConstant(Cst-NVTBits,ShTy));
4656 } else if (Cst == NVTBits) {
4657 Lo = DAG.getConstant(0, NVT);
4660 Lo = DAG.getNode(ISD::SHL, NVT, InL, DAG.getConstant(Cst, ShTy));
4661 Hi = DAG.getNode(ISD::OR, NVT,
4662 DAG.getNode(ISD::SHL, NVT, InH, DAG.getConstant(Cst, ShTy)),
4663 DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(NVTBits-Cst, ShTy)));
4668 Lo = DAG.getConstant(0, NVT);
4669 Hi = DAG.getConstant(0, NVT);
4670 } else if (Cst > NVTBits) {
4671 Lo = DAG.getNode(ISD::SRL, NVT, InH, DAG.getConstant(Cst-NVTBits,ShTy));
4672 Hi = DAG.getConstant(0, NVT);
4673 } else if (Cst == NVTBits) {
4675 Hi = DAG.getConstant(0, NVT);
4677 Lo = DAG.getNode(ISD::OR, NVT,
4678 DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(Cst, ShTy)),
4679 DAG.getNode(ISD::SHL, NVT, InH, DAG.getConstant(NVTBits-Cst, ShTy)));
4680 Hi = DAG.getNode(ISD::SRL, NVT, InH, DAG.getConstant(Cst, ShTy));
4685 Hi = Lo = DAG.getNode(ISD::SRA, NVT, InH,
4686 DAG.getConstant(NVTBits-1, ShTy));
4687 } else if (Cst > NVTBits) {
4688 Lo = DAG.getNode(ISD::SRA, NVT, InH,
4689 DAG.getConstant(Cst-NVTBits, ShTy));
4690 Hi = DAG.getNode(ISD::SRA, NVT, InH,
4691 DAG.getConstant(NVTBits-1, ShTy));
4692 } else if (Cst == NVTBits) {
4694 Hi = DAG.getNode(ISD::SRA, NVT, InH,
4695 DAG.getConstant(NVTBits-1, ShTy));
4697 Lo = DAG.getNode(ISD::OR, NVT,
4698 DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(Cst, ShTy)),
4699 DAG.getNode(ISD::SHL, NVT, InH, DAG.getConstant(NVTBits-Cst, ShTy)));
4700 Hi = DAG.getNode(ISD::SRA, NVT, InH, DAG.getConstant(Cst, ShTy));
4706 // Okay, the shift amount isn't constant. However, if we can tell that it is
4707 // >= 32 or < 32, we can still simplify it, without knowing the actual value.
4708 uint64_t Mask = NVTBits, KnownZero, KnownOne;
4709 DAG.ComputeMaskedBits(Amt, Mask, KnownZero, KnownOne);
4711 // If we know that the high bit of the shift amount is one, then we can do
4712 // this as a couple of simple shifts.
4713 if (KnownOne & Mask) {
4714 // Mask out the high bit, which we know is set.
4715 Amt = DAG.getNode(ISD::AND, Amt.getValueType(), Amt,
4716 DAG.getConstant(NVTBits-1, Amt.getValueType()));
4718 // Expand the incoming operand to be shifted, so that we have its parts
4720 ExpandOp(Op, InL, InH);
4723 Lo = DAG.getConstant(0, NVT); // Low part is zero.
4724 Hi = DAG.getNode(ISD::SHL, NVT, InL, Amt); // High part from Lo part.
4727 Hi = DAG.getConstant(0, NVT); // Hi part is zero.
4728 Lo = DAG.getNode(ISD::SRL, NVT, InH, Amt); // Lo part from Hi part.
4731 Hi = DAG.getNode(ISD::SRA, NVT, InH, // Sign extend high part.
4732 DAG.getConstant(NVTBits-1, Amt.getValueType()));
4733 Lo = DAG.getNode(ISD::SRA, NVT, InH, Amt); // Lo part from Hi part.
4738 // If we know that the high bit of the shift amount is zero, then we can do
4739 // this as a couple of simple shifts.
4740 if (KnownZero & Mask) {
4742 SDOperand Amt2 = DAG.getNode(ISD::SUB, Amt.getValueType(),
4743 DAG.getConstant(NVTBits, Amt.getValueType()),
4746 // Expand the incoming operand to be shifted, so that we have its parts
4748 ExpandOp(Op, InL, InH);
4751 Lo = DAG.getNode(ISD::SHL, NVT, InL, Amt);
4752 Hi = DAG.getNode(ISD::OR, NVT,
4753 DAG.getNode(ISD::SHL, NVT, InH, Amt),
4754 DAG.getNode(ISD::SRL, NVT, InL, Amt2));
4757 Hi = DAG.getNode(ISD::SRL, NVT, InH, Amt);
4758 Lo = DAG.getNode(ISD::OR, NVT,
4759 DAG.getNode(ISD::SRL, NVT, InL, Amt),
4760 DAG.getNode(ISD::SHL, NVT, InH, Amt2));
4763 Hi = DAG.getNode(ISD::SRA, NVT, InH, Amt);
4764 Lo = DAG.getNode(ISD::OR, NVT,
4765 DAG.getNode(ISD::SRL, NVT, InL, Amt),
4766 DAG.getNode(ISD::SHL, NVT, InH, Amt2));
4775 // ExpandLibCall - Expand a node into a call to a libcall. If the result value
4776 // does not fit into a register, return the lo part and set the hi part to the
4777 // by-reg argument. If it does fit into a single register, return the result
4778 // and leave the Hi part unset.
4779 SDOperand SelectionDAGLegalize::ExpandLibCall(const char *Name, SDNode *Node,
4780 bool isSigned, SDOperand &Hi) {
4781 assert(!IsLegalizingCall && "Cannot overlap legalization of calls!");
4782 // The input chain to this libcall is the entry node of the function.
4783 // Legalizing the call will automatically add the previous call to the
4785 SDOperand InChain = DAG.getEntryNode();
4787 TargetLowering::ArgListTy Args;
4788 TargetLowering::ArgListEntry Entry;
4789 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
4790 MVT::ValueType ArgVT = Node->getOperand(i).getValueType();
4791 const Type *ArgTy = MVT::getTypeForValueType(ArgVT);
4792 Entry.Node = Node->getOperand(i); Entry.Ty = ArgTy;
4793 Entry.isSExt = isSigned;
4794 Args.push_back(Entry);
4796 SDOperand Callee = DAG.getExternalSymbol(Name, TLI.getPointerTy());
4798 // Splice the libcall in wherever FindInputOutputChains tells us to.
4799 const Type *RetTy = MVT::getTypeForValueType(Node->getValueType(0));
4800 std::pair<SDOperand,SDOperand> CallInfo =
4801 TLI.LowerCallTo(InChain, RetTy, isSigned, false, CallingConv::C, false,
4804 // Legalize the call sequence, starting with the chain. This will advance
4805 // the LastCALLSEQ_END to the legalized version of the CALLSEQ_END node that
4806 // was added by LowerCallTo (guaranteeing proper serialization of calls).
4807 LegalizeOp(CallInfo.second);
4809 switch (getTypeAction(CallInfo.first.getValueType())) {
4810 default: assert(0 && "Unknown thing");
4812 Result = CallInfo.first;
4815 ExpandOp(CallInfo.first, Result, Hi);
4822 /// ExpandIntToFP - Expand a [US]INT_TO_FP operation.
4824 SDOperand SelectionDAGLegalize::
4825 ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
4826 assert(getTypeAction(Source.getValueType()) == Expand &&
4827 "This is not an expansion!");
4828 assert(Source.getValueType() == MVT::i64 && "Only handle expand from i64!");
4831 assert(Source.getValueType() == MVT::i64 &&
4832 "This only works for 64-bit -> FP");
4833 // The 64-bit value loaded will be incorrectly if the 'sign bit' of the
4834 // incoming integer is set. To handle this, we dynamically test to see if
4835 // it is set, and, if so, add a fudge factor.
4837 ExpandOp(Source, Lo, Hi);
4839 // If this is unsigned, and not supported, first perform the conversion to
4840 // signed, then adjust the result if the sign bit is set.
4841 SDOperand SignedConv = ExpandIntToFP(true, DestTy,
4842 DAG.getNode(ISD::BUILD_PAIR, Source.getValueType(), Lo, Hi));
4844 SDOperand SignSet = DAG.getSetCC(TLI.getSetCCResultTy(), Hi,
4845 DAG.getConstant(0, Hi.getValueType()),
4847 SDOperand Zero = getIntPtrConstant(0), Four = getIntPtrConstant(4);
4848 SDOperand CstOffset = DAG.getNode(ISD::SELECT, Zero.getValueType(),
4849 SignSet, Four, Zero);
4850 uint64_t FF = 0x5f800000ULL;
4851 if (TLI.isLittleEndian()) FF <<= 32;
4852 static Constant *FudgeFactor = ConstantInt::get(Type::Int64Ty, FF);
4854 SDOperand CPIdx = DAG.getConstantPool(FudgeFactor, TLI.getPointerTy());
4855 CPIdx = DAG.getNode(ISD::ADD, TLI.getPointerTy(), CPIdx, CstOffset);
4856 SDOperand FudgeInReg;
4857 if (DestTy == MVT::f32)
4858 FudgeInReg = DAG.getLoad(MVT::f32, DAG.getEntryNode(), CPIdx, NULL, 0);
4859 else if (MVT::getSizeInBits(DestTy) > MVT::getSizeInBits(MVT::f32))
4860 // FIXME: Avoid the extend by construction the right constantpool?
4861 FudgeInReg = DAG.getExtLoad(ISD::EXTLOAD, DestTy, DAG.getEntryNode(),
4862 CPIdx, NULL, 0, MVT::f32);
4864 assert(0 && "Unexpected conversion");
4866 MVT::ValueType SCVT = SignedConv.getValueType();
4867 if (SCVT != DestTy) {
4868 // Destination type needs to be expanded as well. The FADD now we are
4869 // constructing will be expanded into a libcall.
4870 if (MVT::getSizeInBits(SCVT) != MVT::getSizeInBits(DestTy)) {
4871 assert(SCVT == MVT::i32 && DestTy == MVT::f64);
4872 SignedConv = DAG.getNode(ISD::BUILD_PAIR, MVT::i64,
4873 SignedConv, SignedConv.getValue(1));
4875 SignedConv = DAG.getNode(ISD::BIT_CONVERT, DestTy, SignedConv);
4877 return DAG.getNode(ISD::FADD, DestTy, SignedConv, FudgeInReg);
4880 // Check to see if the target has a custom way to lower this. If so, use it.
4881 switch (TLI.getOperationAction(ISD::SINT_TO_FP, Source.getValueType())) {
4882 default: assert(0 && "This action not implemented for this operation!");
4883 case TargetLowering::Legal:
4884 case TargetLowering::Expand:
4885 break; // This case is handled below.
4886 case TargetLowering::Custom: {
4887 SDOperand NV = TLI.LowerOperation(DAG.getNode(ISD::SINT_TO_FP, DestTy,
4890 return LegalizeOp(NV);
4891 break; // The target decided this was legal after all
4895 // Expand the source, then glue it back together for the call. We must expand
4896 // the source in case it is shared (this pass of legalize must traverse it).
4897 SDOperand SrcLo, SrcHi;
4898 ExpandOp(Source, SrcLo, SrcHi);
4899 Source = DAG.getNode(ISD::BUILD_PAIR, Source.getValueType(), SrcLo, SrcHi);
4902 if (DestTy == MVT::f32)
4903 LC = RTLIB::SINTTOFP_I64_F32;
4905 assert(DestTy == MVT::f64 && "Unknown fp value type!");
4906 LC = RTLIB::SINTTOFP_I64_F64;
4909 assert(TLI.getLibcallName(LC) && "Don't know how to expand this SINT_TO_FP!");
4910 Source = DAG.getNode(ISD::SINT_TO_FP, DestTy, Source);
4911 SDOperand UnusedHiPart;
4912 return ExpandLibCall(TLI.getLibcallName(LC), Source.Val, isSigned,
4916 /// ExpandLegalINT_TO_FP - This function is responsible for legalizing a
4917 /// INT_TO_FP operation of the specified operand when the target requests that
4918 /// we expand it. At this point, we know that the result and operand types are
4919 /// legal for the target.
4920 SDOperand SelectionDAGLegalize::ExpandLegalINT_TO_FP(bool isSigned,
4922 MVT::ValueType DestVT) {
4923 if (Op0.getValueType() == MVT::i32) {
4924 // simple 32-bit [signed|unsigned] integer to float/double expansion
4926 // get the stack frame index of a 8 byte buffer, pessimistically aligned
4927 MachineFunction &MF = DAG.getMachineFunction();
4928 const Type *F64Type = MVT::getTypeForValueType(MVT::f64);
4929 unsigned StackAlign =
4930 (unsigned)TLI.getTargetData()->getPrefTypeAlignment(F64Type);
4931 int SSFI = MF.getFrameInfo()->CreateStackObject(8, StackAlign);
4932 // get address of 8 byte buffer
4933 SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
4934 // word offset constant for Hi/Lo address computation
4935 SDOperand WordOff = DAG.getConstant(sizeof(int), TLI.getPointerTy());
4936 // set up Hi and Lo (into buffer) address based on endian
4937 SDOperand Hi = StackSlot;
4938 SDOperand Lo = DAG.getNode(ISD::ADD, TLI.getPointerTy(), StackSlot,WordOff);
4939 if (TLI.isLittleEndian())
4942 // if signed map to unsigned space
4943 SDOperand Op0Mapped;
4945 // constant used to invert sign bit (signed to unsigned mapping)
4946 SDOperand SignBit = DAG.getConstant(0x80000000u, MVT::i32);
4947 Op0Mapped = DAG.getNode(ISD::XOR, MVT::i32, Op0, SignBit);
4951 // store the lo of the constructed double - based on integer input
4952 SDOperand Store1 = DAG.getStore(DAG.getEntryNode(),
4953 Op0Mapped, Lo, NULL, 0);
4954 // initial hi portion of constructed double
4955 SDOperand InitialHi = DAG.getConstant(0x43300000u, MVT::i32);
4956 // store the hi of the constructed double - biased exponent
4957 SDOperand Store2=DAG.getStore(Store1, InitialHi, Hi, NULL, 0);
4958 // load the constructed double
4959 SDOperand Load = DAG.getLoad(MVT::f64, Store2, StackSlot, NULL, 0);
4960 // FP constant to bias correct the final result
4961 SDOperand Bias = DAG.getConstantFP(isSigned ?
4962 BitsToDouble(0x4330000080000000ULL)
4963 : BitsToDouble(0x4330000000000000ULL),
4965 // subtract the bias
4966 SDOperand Sub = DAG.getNode(ISD::FSUB, MVT::f64, Load, Bias);
4969 // handle final rounding
4970 if (DestVT == MVT::f64) {
4973 } else if (MVT::getSizeInBits(DestVT) < MVT::getSizeInBits(MVT::f64)) {
4974 Result = DAG.getNode(ISD::FP_ROUND, DestVT, Sub);
4975 } else if (MVT::getSizeInBits(DestVT) > MVT::getSizeInBits(MVT::f64)) {
4976 Result = DAG.getNode(ISD::FP_EXTEND, DestVT, Sub);
4980 assert(!isSigned && "Legalize cannot Expand SINT_TO_FP for i64 yet");
4981 SDOperand Tmp1 = DAG.getNode(ISD::SINT_TO_FP, DestVT, Op0);
4983 SDOperand SignSet = DAG.getSetCC(TLI.getSetCCResultTy(), Op0,
4984 DAG.getConstant(0, Op0.getValueType()),
4986 SDOperand Zero = getIntPtrConstant(0), Four = getIntPtrConstant(4);
4987 SDOperand CstOffset = DAG.getNode(ISD::SELECT, Zero.getValueType(),
4988 SignSet, Four, Zero);
4990 // If the sign bit of the integer is set, the large number will be treated
4991 // as a negative number. To counteract this, the dynamic code adds an
4992 // offset depending on the data type.
4994 switch (Op0.getValueType()) {
4995 default: assert(0 && "Unsupported integer type!");
4996 case MVT::i8 : FF = 0x43800000ULL; break; // 2^8 (as a float)
4997 case MVT::i16: FF = 0x47800000ULL; break; // 2^16 (as a float)
4998 case MVT::i32: FF = 0x4F800000ULL; break; // 2^32 (as a float)
4999 case MVT::i64: FF = 0x5F800000ULL; break; // 2^64 (as a float)
5001 if (TLI.isLittleEndian()) FF <<= 32;
5002 static Constant *FudgeFactor = ConstantInt::get(Type::Int64Ty, FF);
5004 SDOperand CPIdx = DAG.getConstantPool(FudgeFactor, TLI.getPointerTy());
5005 CPIdx = DAG.getNode(ISD::ADD, TLI.getPointerTy(), CPIdx, CstOffset);
5006 SDOperand FudgeInReg;
5007 if (DestVT == MVT::f32)
5008 FudgeInReg = DAG.getLoad(MVT::f32, DAG.getEntryNode(), CPIdx, NULL, 0);
5010 FudgeInReg = LegalizeOp(DAG.getExtLoad(ISD::EXTLOAD, DestVT,
5011 DAG.getEntryNode(), CPIdx,
5012 NULL, 0, MVT::f32));
5015 return DAG.getNode(ISD::FADD, DestVT, Tmp1, FudgeInReg);
5018 /// PromoteLegalINT_TO_FP - This function is responsible for legalizing a
5019 /// *INT_TO_FP operation of the specified operand when the target requests that
5020 /// we promote it. At this point, we know that the result and operand types are
5021 /// legal for the target, and that there is a legal UINT_TO_FP or SINT_TO_FP
5022 /// operation that takes a larger input.
5023 SDOperand SelectionDAGLegalize::PromoteLegalINT_TO_FP(SDOperand LegalOp,
5024 MVT::ValueType DestVT,
5026 // First step, figure out the appropriate *INT_TO_FP operation to use.
5027 MVT::ValueType NewInTy = LegalOp.getValueType();
5029 unsigned OpToUse = 0;
5031 // Scan for the appropriate larger type to use.
5033 NewInTy = (MVT::ValueType)(NewInTy+1);
5034 assert(MVT::isInteger(NewInTy) && "Ran out of possibilities!");
5036 // If the target supports SINT_TO_FP of this type, use it.
5037 switch (TLI.getOperationAction(ISD::SINT_TO_FP, NewInTy)) {
5039 case TargetLowering::Legal:
5040 if (!TLI.isTypeLegal(NewInTy))
5041 break; // Can't use this datatype.
5043 case TargetLowering::Custom:
5044 OpToUse = ISD::SINT_TO_FP;
5048 if (isSigned) continue;
5050 // If the target supports UINT_TO_FP of this type, use it.
5051 switch (TLI.getOperationAction(ISD::UINT_TO_FP, NewInTy)) {
5053 case TargetLowering::Legal:
5054 if (!TLI.isTypeLegal(NewInTy))
5055 break; // Can't use this datatype.
5057 case TargetLowering::Custom:
5058 OpToUse = ISD::UINT_TO_FP;
5063 // Otherwise, try a larger type.
5066 // Okay, we found the operation and type to use. Zero extend our input to the
5067 // desired type then run the operation on it.
5068 return DAG.getNode(OpToUse, DestVT,
5069 DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
5073 /// PromoteLegalFP_TO_INT - This function is responsible for legalizing a
5074 /// FP_TO_*INT operation of the specified operand when the target requests that
5075 /// we promote it. At this point, we know that the result and operand types are
5076 /// legal for the target, and that there is a legal FP_TO_UINT or FP_TO_SINT
5077 /// operation that returns a larger result.
5078 SDOperand SelectionDAGLegalize::PromoteLegalFP_TO_INT(SDOperand LegalOp,
5079 MVT::ValueType DestVT,
5081 // First step, figure out the appropriate FP_TO*INT operation to use.
5082 MVT::ValueType NewOutTy = DestVT;
5084 unsigned OpToUse = 0;
5086 // Scan for the appropriate larger type to use.
5088 NewOutTy = (MVT::ValueType)(NewOutTy+1);
5089 assert(MVT::isInteger(NewOutTy) && "Ran out of possibilities!");
5091 // If the target supports FP_TO_SINT returning this type, use it.
5092 switch (TLI.getOperationAction(ISD::FP_TO_SINT, NewOutTy)) {
5094 case TargetLowering::Legal:
5095 if (!TLI.isTypeLegal(NewOutTy))
5096 break; // Can't use this datatype.
5098 case TargetLowering::Custom:
5099 OpToUse = ISD::FP_TO_SINT;
5104 // If the target supports FP_TO_UINT of this type, use it.
5105 switch (TLI.getOperationAction(ISD::FP_TO_UINT, NewOutTy)) {
5107 case TargetLowering::Legal:
5108 if (!TLI.isTypeLegal(NewOutTy))
5109 break; // Can't use this datatype.
5111 case TargetLowering::Custom:
5112 OpToUse = ISD::FP_TO_UINT;
5117 // Otherwise, try a larger type.
5120 // Okay, we found the operation and type to use. Truncate the result of the
5121 // extended FP_TO_*INT operation to the desired size.
5122 return DAG.getNode(ISD::TRUNCATE, DestVT,
5123 DAG.getNode(OpToUse, NewOutTy, LegalOp));
5126 /// ExpandBSWAP - Open code the operations for BSWAP of the specified operation.
5128 SDOperand SelectionDAGLegalize::ExpandBSWAP(SDOperand Op) {
5129 MVT::ValueType VT = Op.getValueType();
5130 MVT::ValueType SHVT = TLI.getShiftAmountTy();
5131 SDOperand Tmp1, Tmp2, Tmp3, Tmp4, Tmp5, Tmp6, Tmp7, Tmp8;
5133 default: assert(0 && "Unhandled Expand type in BSWAP!"); abort();
5135 Tmp2 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(8, SHVT));
5136 Tmp1 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(8, SHVT));
5137 return DAG.getNode(ISD::OR, VT, Tmp1, Tmp2);
5139 Tmp4 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(24, SHVT));
5140 Tmp3 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(8, SHVT));
5141 Tmp2 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(8, SHVT));
5142 Tmp1 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(24, SHVT));
5143 Tmp3 = DAG.getNode(ISD::AND, VT, Tmp3, DAG.getConstant(0xFF0000, VT));
5144 Tmp2 = DAG.getNode(ISD::AND, VT, Tmp2, DAG.getConstant(0xFF00, VT));
5145 Tmp4 = DAG.getNode(ISD::OR, VT, Tmp4, Tmp3);
5146 Tmp2 = DAG.getNode(ISD::OR, VT, Tmp2, Tmp1);
5147 return DAG.getNode(ISD::OR, VT, Tmp4, Tmp2);
5149 Tmp8 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(56, SHVT));
5150 Tmp7 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(40, SHVT));
5151 Tmp6 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(24, SHVT));
5152 Tmp5 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(8, SHVT));
5153 Tmp4 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(8, SHVT));
5154 Tmp3 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(24, SHVT));
5155 Tmp2 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(40, SHVT));
5156 Tmp1 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(56, SHVT));
5157 Tmp7 = DAG.getNode(ISD::AND, VT, Tmp7, DAG.getConstant(255ULL<<48, VT));
5158 Tmp6 = DAG.getNode(ISD::AND, VT, Tmp6, DAG.getConstant(255ULL<<40, VT));
5159 Tmp5 = DAG.getNode(ISD::AND, VT, Tmp5, DAG.getConstant(255ULL<<32, VT));
5160 Tmp4 = DAG.getNode(ISD::AND, VT, Tmp4, DAG.getConstant(255ULL<<24, VT));
5161 Tmp3 = DAG.getNode(ISD::AND, VT, Tmp3, DAG.getConstant(255ULL<<16, VT));
5162 Tmp2 = DAG.getNode(ISD::AND, VT, Tmp2, DAG.getConstant(255ULL<<8 , VT));
5163 Tmp8 = DAG.getNode(ISD::OR, VT, Tmp8, Tmp7);
5164 Tmp6 = DAG.getNode(ISD::OR, VT, Tmp6, Tmp5);
5165 Tmp4 = DAG.getNode(ISD::OR, VT, Tmp4, Tmp3);
5166 Tmp2 = DAG.getNode(ISD::OR, VT, Tmp2, Tmp1);
5167 Tmp8 = DAG.getNode(ISD::OR, VT, Tmp8, Tmp6);
5168 Tmp4 = DAG.getNode(ISD::OR, VT, Tmp4, Tmp2);
5169 return DAG.getNode(ISD::OR, VT, Tmp8, Tmp4);
5173 /// ExpandBitCount - Expand the specified bitcount instruction into operations.
5175 SDOperand SelectionDAGLegalize::ExpandBitCount(unsigned Opc, SDOperand Op) {
5177 default: assert(0 && "Cannot expand this yet!");
5179 static const uint64_t mask[6] = {
5180 0x5555555555555555ULL, 0x3333333333333333ULL,
5181 0x0F0F0F0F0F0F0F0FULL, 0x00FF00FF00FF00FFULL,
5182 0x0000FFFF0000FFFFULL, 0x00000000FFFFFFFFULL
5184 MVT::ValueType VT = Op.getValueType();
5185 MVT::ValueType ShVT = TLI.getShiftAmountTy();
5186 unsigned len = MVT::getSizeInBits(VT);
5187 for (unsigned i = 0; (1U << i) <= (len / 2); ++i) {
5188 //x = (x & mask[i][len/8]) + (x >> (1 << i) & mask[i][len/8])
5189 SDOperand Tmp2 = DAG.getConstant(mask[i], VT);
5190 SDOperand Tmp3 = DAG.getConstant(1ULL << i, ShVT);
5191 Op = DAG.getNode(ISD::ADD, VT, DAG.getNode(ISD::AND, VT, Op, Tmp2),
5192 DAG.getNode(ISD::AND, VT,
5193 DAG.getNode(ISD::SRL, VT, Op, Tmp3),Tmp2));
5198 // for now, we do this:
5199 // x = x | (x >> 1);
5200 // x = x | (x >> 2);
5202 // x = x | (x >>16);
5203 // x = x | (x >>32); // for 64-bit input
5204 // return popcount(~x);
5206 // but see also: http://www.hackersdelight.org/HDcode/nlz.cc
5207 MVT::ValueType VT = Op.getValueType();
5208 MVT::ValueType ShVT = TLI.getShiftAmountTy();
5209 unsigned len = MVT::getSizeInBits(VT);
5210 for (unsigned i = 0; (1U << i) <= (len / 2); ++i) {
5211 SDOperand Tmp3 = DAG.getConstant(1ULL << i, ShVT);
5212 Op = DAG.getNode(ISD::OR, VT, Op, DAG.getNode(ISD::SRL, VT, Op, Tmp3));
5214 Op = DAG.getNode(ISD::XOR, VT, Op, DAG.getConstant(~0ULL, VT));
5215 return DAG.getNode(ISD::CTPOP, VT, Op);
5218 // for now, we use: { return popcount(~x & (x - 1)); }
5219 // unless the target has ctlz but not ctpop, in which case we use:
5220 // { return 32 - nlz(~x & (x-1)); }
5221 // see also http://www.hackersdelight.org/HDcode/ntz.cc
5222 MVT::ValueType VT = Op.getValueType();
5223 SDOperand Tmp2 = DAG.getConstant(~0ULL, VT);
5224 SDOperand Tmp3 = DAG.getNode(ISD::AND, VT,
5225 DAG.getNode(ISD::XOR, VT, Op, Tmp2),
5226 DAG.getNode(ISD::SUB, VT, Op, DAG.getConstant(1, VT)));
5227 // If ISD::CTLZ is legal and CTPOP isn't, then do that instead.
5228 if (!TLI.isOperationLegal(ISD::CTPOP, VT) &&
5229 TLI.isOperationLegal(ISD::CTLZ, VT))
5230 return DAG.getNode(ISD::SUB, VT,
5231 DAG.getConstant(MVT::getSizeInBits(VT), VT),
5232 DAG.getNode(ISD::CTLZ, VT, Tmp3));
5233 return DAG.getNode(ISD::CTPOP, VT, Tmp3);
5238 /// ExpandOp - Expand the specified SDOperand into its two component pieces
5239 /// Lo&Hi. Note that the Op MUST be an expanded type. As a result of this, the
5240 /// LegalizeNodes map is filled in for any results that are not expanded, the
5241 /// ExpandedNodes map is filled in for any results that are expanded, and the
5242 /// Lo/Hi values are returned.
5243 void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
5244 MVT::ValueType VT = Op.getValueType();
5245 MVT::ValueType NVT = TLI.getTypeToTransformTo(VT);
5246 SDNode *Node = Op.Val;
5247 assert(getTypeAction(VT) == Expand && "Not an expanded type!");
5248 assert(((MVT::isInteger(NVT) && NVT < VT) || MVT::isFloatingPoint(VT) ||
5249 MVT::isVector(VT)) &&
5250 "Cannot expand to FP value or to larger int value!");
5252 // See if we already expanded it.
5253 DenseMap<SDOperand, std::pair<SDOperand, SDOperand> >::iterator I
5254 = ExpandedNodes.find(Op);
5255 if (I != ExpandedNodes.end()) {
5256 Lo = I->second.first;
5257 Hi = I->second.second;
5261 switch (Node->getOpcode()) {
5262 case ISD::CopyFromReg:
5263 assert(0 && "CopyFromReg must be legal!");
5264 case ISD::FP_ROUND_INREG:
5265 if (VT == MVT::ppcf128 &&
5266 TLI.getOperationAction(ISD::FP_ROUND_INREG, VT) ==
5267 TargetLowering::Custom) {
5268 SDOperand SrcLo, SrcHi, Src;
5269 ExpandOp(Op.getOperand(0), SrcLo, SrcHi);
5270 Src = DAG.getNode(ISD::BUILD_PAIR, VT, SrcLo, SrcHi);
5271 SDOperand Result = TLI.LowerOperation(
5272 DAG.getNode(ISD::FP_ROUND_INREG, VT, Src, Op.getOperand(1)), DAG);
5273 assert(Result.Val->getOpcode() == ISD::BUILD_PAIR);
5274 Lo = Result.Val->getOperand(0);
5275 Hi = Result.Val->getOperand(1);
5281 cerr << "NODE: "; Node->dump(&DAG); cerr << "\n";
5283 assert(0 && "Do not know how to expand this operator!");
5286 NVT = TLI.getTypeToExpandTo(VT);
5287 Lo = DAG.getNode(ISD::UNDEF, NVT);
5288 Hi = DAG.getNode(ISD::UNDEF, NVT);
5290 case ISD::Constant: {
5291 uint64_t Cst = cast<ConstantSDNode>(Node)->getValue();
5292 Lo = DAG.getConstant(Cst, NVT);
5293 Hi = DAG.getConstant(Cst >> MVT::getSizeInBits(NVT), NVT);
5296 case ISD::ConstantFP: {
5297 ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Node);
5298 if (CFP->getValueType(0) == MVT::ppcf128) {
5299 APInt api = CFP->getValueAPF().convertToAPInt();
5300 Lo = DAG.getConstantFP(APFloat(APInt(64, 1, &api.getRawData()[1])),
5302 Hi = DAG.getConstantFP(APFloat(APInt(64, 1, &api.getRawData()[0])),
5306 Lo = ExpandConstantFP(CFP, false, DAG, TLI);
5307 if (getTypeAction(Lo.getValueType()) == Expand)
5308 ExpandOp(Lo, Lo, Hi);
5311 case ISD::BUILD_PAIR:
5312 // Return the operands.
5313 Lo = Node->getOperand(0);
5314 Hi = Node->getOperand(1);
5317 case ISD::SIGN_EXTEND_INREG:
5318 ExpandOp(Node->getOperand(0), Lo, Hi);
5319 // sext_inreg the low part if needed.
5320 Lo = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Lo, Node->getOperand(1));
5322 // The high part gets the sign extension from the lo-part. This handles
5323 // things like sextinreg V:i64 from i8.
5324 Hi = DAG.getNode(ISD::SRA, NVT, Lo,
5325 DAG.getConstant(MVT::getSizeInBits(NVT)-1,
5326 TLI.getShiftAmountTy()));
5330 ExpandOp(Node->getOperand(0), Lo, Hi);
5331 SDOperand TempLo = DAG.getNode(ISD::BSWAP, NVT, Hi);
5332 Hi = DAG.getNode(ISD::BSWAP, NVT, Lo);
5338 ExpandOp(Node->getOperand(0), Lo, Hi);
5339 Lo = DAG.getNode(ISD::ADD, NVT, // ctpop(HL) -> ctpop(H)+ctpop(L)
5340 DAG.getNode(ISD::CTPOP, NVT, Lo),
5341 DAG.getNode(ISD::CTPOP, NVT, Hi));
5342 Hi = DAG.getConstant(0, NVT);
5346 // ctlz (HL) -> ctlz(H) != 32 ? ctlz(H) : (ctlz(L)+32)
5347 ExpandOp(Node->getOperand(0), Lo, Hi);
5348 SDOperand BitsC = DAG.getConstant(MVT::getSizeInBits(NVT), NVT);
5349 SDOperand HLZ = DAG.getNode(ISD::CTLZ, NVT, Hi);
5350 SDOperand TopNotZero = DAG.getSetCC(TLI.getSetCCResultTy(), HLZ, BitsC,
5352 SDOperand LowPart = DAG.getNode(ISD::CTLZ, NVT, Lo);
5353 LowPart = DAG.getNode(ISD::ADD, NVT, LowPart, BitsC);
5355 Lo = DAG.getNode(ISD::SELECT, NVT, TopNotZero, HLZ, LowPart);
5356 Hi = DAG.getConstant(0, NVT);
5361 // cttz (HL) -> cttz(L) != 32 ? cttz(L) : (cttz(H)+32)
5362 ExpandOp(Node->getOperand(0), Lo, Hi);
5363 SDOperand BitsC = DAG.getConstant(MVT::getSizeInBits(NVT), NVT);
5364 SDOperand LTZ = DAG.getNode(ISD::CTTZ, NVT, Lo);
5365 SDOperand BotNotZero = DAG.getSetCC(TLI.getSetCCResultTy(), LTZ, BitsC,
5367 SDOperand HiPart = DAG.getNode(ISD::CTTZ, NVT, Hi);
5368 HiPart = DAG.getNode(ISD::ADD, NVT, HiPart, BitsC);
5370 Lo = DAG.getNode(ISD::SELECT, NVT, BotNotZero, LTZ, HiPart);
5371 Hi = DAG.getConstant(0, NVT);
5376 SDOperand Ch = Node->getOperand(0); // Legalize the chain.
5377 SDOperand Ptr = Node->getOperand(1); // Legalize the pointer.
5378 Lo = DAG.getVAArg(NVT, Ch, Ptr, Node->getOperand(2));
5379 Hi = DAG.getVAArg(NVT, Lo.getValue(1), Ptr, Node->getOperand(2));
5381 // Remember that we legalized the chain.
5382 Hi = LegalizeOp(Hi);
5383 AddLegalizedOperand(Op.getValue(1), Hi.getValue(1));
5384 if (!TLI.isLittleEndian())
5390 LoadSDNode *LD = cast<LoadSDNode>(Node);
5391 SDOperand Ch = LD->getChain(); // Legalize the chain.
5392 SDOperand Ptr = LD->getBasePtr(); // Legalize the pointer.
5393 ISD::LoadExtType ExtType = LD->getExtensionType();
5394 int SVOffset = LD->getSrcValueOffset();
5395 unsigned Alignment = LD->getAlignment();
5396 bool isVolatile = LD->isVolatile();
5398 if (ExtType == ISD::NON_EXTLOAD) {
5399 Lo = DAG.getLoad(NVT, Ch, Ptr, LD->getSrcValue(), SVOffset,
5400 isVolatile, Alignment);
5401 if (VT == MVT::f32 || VT == MVT::f64) {
5402 // f32->i32 or f64->i64 one to one expansion.
5403 // Remember that we legalized the chain.
5404 AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Lo.getValue(1)));
5405 // Recursively expand the new load.
5406 if (getTypeAction(NVT) == Expand)
5407 ExpandOp(Lo, Lo, Hi);
5411 // Increment the pointer to the other half.
5412 unsigned IncrementSize = MVT::getSizeInBits(Lo.getValueType())/8;
5413 Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
5414 getIntPtrConstant(IncrementSize));
5415 SVOffset += IncrementSize;
5416 if (Alignment > IncrementSize)
5417 Alignment = IncrementSize;
5418 Hi = DAG.getLoad(NVT, Ch, Ptr, LD->getSrcValue(), SVOffset,
5419 isVolatile, Alignment);
5421 // Build a factor node to remember that this load is independent of the
5423 SDOperand TF = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo.getValue(1),
5426 // Remember that we legalized the chain.
5427 AddLegalizedOperand(Op.getValue(1), LegalizeOp(TF));
5428 if (!TLI.isLittleEndian())
5431 MVT::ValueType EVT = LD->getLoadedVT();
5433 if (VT == MVT::f64 && EVT == MVT::f32) {
5434 // f64 = EXTLOAD f32 should expand to LOAD, FP_EXTEND
5435 SDOperand Load = DAG.getLoad(EVT, Ch, Ptr, LD->getSrcValue(),
5436 SVOffset, isVolatile, Alignment);
5437 // Remember that we legalized the chain.
5438 AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Load.getValue(1)));
5439 ExpandOp(DAG.getNode(ISD::FP_EXTEND, VT, Load), Lo, Hi);
5444 Lo = DAG.getLoad(NVT, Ch, Ptr, LD->getSrcValue(),
5445 SVOffset, isVolatile, Alignment);
5447 Lo = DAG.getExtLoad(ExtType, NVT, Ch, Ptr, LD->getSrcValue(),
5448 SVOffset, EVT, isVolatile,
5451 // Remember that we legalized the chain.
5452 AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Lo.getValue(1)));
5454 if (ExtType == ISD::SEXTLOAD) {
5455 // The high part is obtained by SRA'ing all but one of the bits of the
5457 unsigned LoSize = MVT::getSizeInBits(Lo.getValueType());
5458 Hi = DAG.getNode(ISD::SRA, NVT, Lo,
5459 DAG.getConstant(LoSize-1, TLI.getShiftAmountTy()));
5460 } else if (ExtType == ISD::ZEXTLOAD) {
5461 // The high part is just a zero.
5462 Hi = DAG.getConstant(0, NVT);
5463 } else /* if (ExtType == ISD::EXTLOAD) */ {
5464 // The high part is undefined.
5465 Hi = DAG.getNode(ISD::UNDEF, NVT);
5472 case ISD::XOR: { // Simple logical operators -> two trivial pieces.
5473 SDOperand LL, LH, RL, RH;
5474 ExpandOp(Node->getOperand(0), LL, LH);
5475 ExpandOp(Node->getOperand(1), RL, RH);
5476 Lo = DAG.getNode(Node->getOpcode(), NVT, LL, RL);
5477 Hi = DAG.getNode(Node->getOpcode(), NVT, LH, RH);
5481 SDOperand LL, LH, RL, RH;
5482 ExpandOp(Node->getOperand(1), LL, LH);
5483 ExpandOp(Node->getOperand(2), RL, RH);
5484 if (getTypeAction(NVT) == Expand)
5485 NVT = TLI.getTypeToExpandTo(NVT);
5486 Lo = DAG.getNode(ISD::SELECT, NVT, Node->getOperand(0), LL, RL);
5488 Hi = DAG.getNode(ISD::SELECT, NVT, Node->getOperand(0), LH, RH);
5491 case ISD::SELECT_CC: {
5492 SDOperand TL, TH, FL, FH;
5493 ExpandOp(Node->getOperand(2), TL, TH);
5494 ExpandOp(Node->getOperand(3), FL, FH);
5495 if (getTypeAction(NVT) == Expand)
5496 NVT = TLI.getTypeToExpandTo(NVT);
5497 Lo = DAG.getNode(ISD::SELECT_CC, NVT, Node->getOperand(0),
5498 Node->getOperand(1), TL, FL, Node->getOperand(4));
5500 Hi = DAG.getNode(ISD::SELECT_CC, NVT, Node->getOperand(0),
5501 Node->getOperand(1), TH, FH, Node->getOperand(4));
5504 case ISD::ANY_EXTEND:
5505 // The low part is any extension of the input (which degenerates to a copy).
5506 Lo = DAG.getNode(ISD::ANY_EXTEND, NVT, Node->getOperand(0));
5507 // The high part is undefined.
5508 Hi = DAG.getNode(ISD::UNDEF, NVT);
5510 case ISD::SIGN_EXTEND: {
5511 // The low part is just a sign extension of the input (which degenerates to
5513 Lo = DAG.getNode(ISD::SIGN_EXTEND, NVT, Node->getOperand(0));
5515 // The high part is obtained by SRA'ing all but one of the bits of the lo
5517 unsigned LoSize = MVT::getSizeInBits(Lo.getValueType());
5518 Hi = DAG.getNode(ISD::SRA, NVT, Lo,
5519 DAG.getConstant(LoSize-1, TLI.getShiftAmountTy()));
5522 case ISD::ZERO_EXTEND:
5523 // The low part is just a zero extension of the input (which degenerates to
5525 Lo = DAG.getNode(ISD::ZERO_EXTEND, NVT, Node->getOperand(0));
5527 // The high part is just a zero.
5528 Hi = DAG.getConstant(0, NVT);
5531 case ISD::TRUNCATE: {
5532 // The input value must be larger than this value. Expand *it*.
5534 ExpandOp(Node->getOperand(0), NewLo, Hi);
5536 // The low part is now either the right size, or it is closer. If not the
5537 // right size, make an illegal truncate so we recursively expand it.
5538 if (NewLo.getValueType() != Node->getValueType(0))
5539 NewLo = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), NewLo);
5540 ExpandOp(NewLo, Lo, Hi);
5544 case ISD::BIT_CONVERT: {
5546 if (TLI.getOperationAction(ISD::BIT_CONVERT, VT) == TargetLowering::Custom){
5547 // If the target wants to, allow it to lower this itself.
5548 switch (getTypeAction(Node->getOperand(0).getValueType())) {
5549 case Expand: assert(0 && "cannot expand FP!");
5550 case Legal: Tmp = LegalizeOp(Node->getOperand(0)); break;
5551 case Promote: Tmp = PromoteOp (Node->getOperand(0)); break;
5553 Tmp = TLI.LowerOperation(DAG.getNode(ISD::BIT_CONVERT, VT, Tmp), DAG);
5556 // f32 / f64 must be expanded to i32 / i64.
5557 if (VT == MVT::f32 || VT == MVT::f64) {
5558 Lo = DAG.getNode(ISD::BIT_CONVERT, NVT, Node->getOperand(0));
5559 if (getTypeAction(NVT) == Expand)
5560 ExpandOp(Lo, Lo, Hi);
5564 // If source operand will be expanded to the same type as VT, i.e.
5565 // i64 <- f64, i32 <- f32, expand the source operand instead.
5566 MVT::ValueType VT0 = Node->getOperand(0).getValueType();
5567 if (getTypeAction(VT0) == Expand && TLI.getTypeToTransformTo(VT0) == VT) {
5568 ExpandOp(Node->getOperand(0), Lo, Hi);
5572 // Turn this into a load/store pair by default.
5574 Tmp = ExpandBIT_CONVERT(VT, Node->getOperand(0));
5576 ExpandOp(Tmp, Lo, Hi);
5580 case ISD::READCYCLECOUNTER:
5581 assert(TLI.getOperationAction(ISD::READCYCLECOUNTER, VT) ==
5582 TargetLowering::Custom &&
5583 "Must custom expand ReadCycleCounter");
5584 Lo = TLI.LowerOperation(Op, DAG);
5585 assert(Lo.Val && "Node must be custom expanded!");
5586 Hi = Lo.getValue(1);
5587 AddLegalizedOperand(SDOperand(Node, 1), // Remember we legalized the chain.
5588 LegalizeOp(Lo.getValue(2)));
5591 // These operators cannot be expanded directly, emit them as calls to
5592 // library functions.
5593 case ISD::FP_TO_SINT: {
5594 if (TLI.getOperationAction(ISD::FP_TO_SINT, VT) == TargetLowering::Custom) {
5596 switch (getTypeAction(Node->getOperand(0).getValueType())) {
5597 case Expand: assert(0 && "cannot expand FP!");
5598 case Legal: Op = LegalizeOp(Node->getOperand(0)); break;
5599 case Promote: Op = PromoteOp (Node->getOperand(0)); break;
5602 Op = TLI.LowerOperation(DAG.getNode(ISD::FP_TO_SINT, VT, Op), DAG);
5604 // Now that the custom expander is done, expand the result, which is still
5607 ExpandOp(Op, Lo, Hi);
5612 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
5613 if (Node->getOperand(0).getValueType() == MVT::f32)
5614 LC = RTLIB::FPTOSINT_F32_I64;
5615 else if (Node->getOperand(0).getValueType() == MVT::f64)
5616 LC = RTLIB::FPTOSINT_F64_I64;
5617 else if (Node->getOperand(0).getValueType() == MVT::f80)
5618 LC = RTLIB::FPTOSINT_F80_I64;
5619 else if (Node->getOperand(0).getValueType() == MVT::ppcf128)
5620 LC = RTLIB::FPTOSINT_PPCF128_I64;
5621 Lo = ExpandLibCall(TLI.getLibcallName(LC), Node,
5622 false/*sign irrelevant*/, Hi);
5626 case ISD::FP_TO_UINT: {
5627 if (TLI.getOperationAction(ISD::FP_TO_UINT, VT) == TargetLowering::Custom) {
5629 switch (getTypeAction(Node->getOperand(0).getValueType())) {
5630 case Expand: assert(0 && "cannot expand FP!");
5631 case Legal: Op = LegalizeOp(Node->getOperand(0)); break;
5632 case Promote: Op = PromoteOp (Node->getOperand(0)); break;
5635 Op = TLI.LowerOperation(DAG.getNode(ISD::FP_TO_UINT, VT, Op), DAG);
5637 // Now that the custom expander is done, expand the result.
5639 ExpandOp(Op, Lo, Hi);
5644 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
5645 if (Node->getOperand(0).getValueType() == MVT::f32)
5646 LC = RTLIB::FPTOUINT_F32_I64;
5647 else if (Node->getOperand(0).getValueType() == MVT::f64)
5648 LC = RTLIB::FPTOUINT_F64_I64;
5649 else if (Node->getOperand(0).getValueType() == MVT::f80)
5650 LC = RTLIB::FPTOUINT_F80_I64;
5651 else if (Node->getOperand(0).getValueType() == MVT::ppcf128)
5652 LC = RTLIB::FPTOUINT_PPCF128_I64;
5653 Lo = ExpandLibCall(TLI.getLibcallName(LC), Node,
5654 false/*sign irrelevant*/, Hi);
5659 // If the target wants custom lowering, do so.
5660 SDOperand ShiftAmt = LegalizeOp(Node->getOperand(1));
5661 if (TLI.getOperationAction(ISD::SHL, VT) == TargetLowering::Custom) {
5662 SDOperand Op = DAG.getNode(ISD::SHL, VT, Node->getOperand(0), ShiftAmt);
5663 Op = TLI.LowerOperation(Op, DAG);
5665 // Now that the custom expander is done, expand the result, which is
5667 ExpandOp(Op, Lo, Hi);
5672 // If ADDC/ADDE are supported and if the shift amount is a constant 1, emit
5673 // this X << 1 as X+X.
5674 if (ConstantSDNode *ShAmt = dyn_cast<ConstantSDNode>(ShiftAmt)) {
5675 if (ShAmt->getValue() == 1 && TLI.isOperationLegal(ISD::ADDC, NVT) &&
5676 TLI.isOperationLegal(ISD::ADDE, NVT)) {
5677 SDOperand LoOps[2], HiOps[3];
5678 ExpandOp(Node->getOperand(0), LoOps[0], HiOps[0]);
5679 SDVTList VTList = DAG.getVTList(LoOps[0].getValueType(), MVT::Flag);
5680 LoOps[1] = LoOps[0];
5681 Lo = DAG.getNode(ISD::ADDC, VTList, LoOps, 2);
5683 HiOps[1] = HiOps[0];
5684 HiOps[2] = Lo.getValue(1);
5685 Hi = DAG.getNode(ISD::ADDE, VTList, HiOps, 3);
5690 // If we can emit an efficient shift operation, do so now.
5691 if (ExpandShift(ISD::SHL, Node->getOperand(0), ShiftAmt, Lo, Hi))
5694 // If this target supports SHL_PARTS, use it.
5695 TargetLowering::LegalizeAction Action =
5696 TLI.getOperationAction(ISD::SHL_PARTS, NVT);
5697 if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
5698 Action == TargetLowering::Custom) {
5699 ExpandShiftParts(ISD::SHL_PARTS, Node->getOperand(0), ShiftAmt, Lo, Hi);
5703 // Otherwise, emit a libcall.
5704 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::SHL_I64), Node,
5705 false/*left shift=unsigned*/, Hi);
5710 // If the target wants custom lowering, do so.
5711 SDOperand ShiftAmt = LegalizeOp(Node->getOperand(1));
5712 if (TLI.getOperationAction(ISD::SRA, VT) == TargetLowering::Custom) {
5713 SDOperand Op = DAG.getNode(ISD::SRA, VT, Node->getOperand(0), ShiftAmt);
5714 Op = TLI.LowerOperation(Op, DAG);
5716 // Now that the custom expander is done, expand the result, which is
5718 ExpandOp(Op, Lo, Hi);
5723 // If we can emit an efficient shift operation, do so now.
5724 if (ExpandShift(ISD::SRA, Node->getOperand(0), ShiftAmt, Lo, Hi))
5727 // If this target supports SRA_PARTS, use it.
5728 TargetLowering::LegalizeAction Action =
5729 TLI.getOperationAction(ISD::SRA_PARTS, NVT);
5730 if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
5731 Action == TargetLowering::Custom) {
5732 ExpandShiftParts(ISD::SRA_PARTS, Node->getOperand(0), ShiftAmt, Lo, Hi);
5736 // Otherwise, emit a libcall.
5737 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::SRA_I64), Node,
5738 true/*ashr is signed*/, Hi);
5743 // If the target wants custom lowering, do so.
5744 SDOperand ShiftAmt = LegalizeOp(Node->getOperand(1));
5745 if (TLI.getOperationAction(ISD::SRL, VT) == TargetLowering::Custom) {
5746 SDOperand Op = DAG.getNode(ISD::SRL, VT, Node->getOperand(0), ShiftAmt);
5747 Op = TLI.LowerOperation(Op, DAG);
5749 // Now that the custom expander is done, expand the result, which is
5751 ExpandOp(Op, Lo, Hi);
5756 // If we can emit an efficient shift operation, do so now.
5757 if (ExpandShift(ISD::SRL, Node->getOperand(0), ShiftAmt, Lo, Hi))
5760 // If this target supports SRL_PARTS, use it.
5761 TargetLowering::LegalizeAction Action =
5762 TLI.getOperationAction(ISD::SRL_PARTS, NVT);
5763 if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
5764 Action == TargetLowering::Custom) {
5765 ExpandShiftParts(ISD::SRL_PARTS, Node->getOperand(0), ShiftAmt, Lo, Hi);
5769 // Otherwise, emit a libcall.
5770 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::SRL_I64), Node,
5771 false/*lshr is unsigned*/, Hi);
5777 // If the target wants to custom expand this, let them.
5778 if (TLI.getOperationAction(Node->getOpcode(), VT) ==
5779 TargetLowering::Custom) {
5780 Op = TLI.LowerOperation(Op, DAG);
5782 ExpandOp(Op, Lo, Hi);
5787 // Expand the subcomponents.
5788 SDOperand LHSL, LHSH, RHSL, RHSH;
5789 ExpandOp(Node->getOperand(0), LHSL, LHSH);
5790 ExpandOp(Node->getOperand(1), RHSL, RHSH);
5791 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
5792 SDOperand LoOps[2], HiOps[3];
5797 if (Node->getOpcode() == ISD::ADD) {
5798 Lo = DAG.getNode(ISD::ADDC, VTList, LoOps, 2);
5799 HiOps[2] = Lo.getValue(1);
5800 Hi = DAG.getNode(ISD::ADDE, VTList, HiOps, 3);
5802 Lo = DAG.getNode(ISD::SUBC, VTList, LoOps, 2);
5803 HiOps[2] = Lo.getValue(1);
5804 Hi = DAG.getNode(ISD::SUBE, VTList, HiOps, 3);
5811 // Expand the subcomponents.
5812 SDOperand LHSL, LHSH, RHSL, RHSH;
5813 ExpandOp(Node->getOperand(0), LHSL, LHSH);
5814 ExpandOp(Node->getOperand(1), RHSL, RHSH);
5815 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
5816 SDOperand LoOps[2] = { LHSL, RHSL };
5817 SDOperand HiOps[3] = { LHSH, RHSH };
5819 if (Node->getOpcode() == ISD::ADDC) {
5820 Lo = DAG.getNode(ISD::ADDC, VTList, LoOps, 2);
5821 HiOps[2] = Lo.getValue(1);
5822 Hi = DAG.getNode(ISD::ADDE, VTList, HiOps, 3);
5824 Lo = DAG.getNode(ISD::SUBC, VTList, LoOps, 2);
5825 HiOps[2] = Lo.getValue(1);
5826 Hi = DAG.getNode(ISD::SUBE, VTList, HiOps, 3);
5828 // Remember that we legalized the flag.
5829 AddLegalizedOperand(Op.getValue(1), LegalizeOp(Hi.getValue(1)));
5834 // Expand the subcomponents.
5835 SDOperand LHSL, LHSH, RHSL, RHSH;
5836 ExpandOp(Node->getOperand(0), LHSL, LHSH);
5837 ExpandOp(Node->getOperand(1), RHSL, RHSH);
5838 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
5839 SDOperand LoOps[3] = { LHSL, RHSL, Node->getOperand(2) };
5840 SDOperand HiOps[3] = { LHSH, RHSH };
5842 Lo = DAG.getNode(Node->getOpcode(), VTList, LoOps, 3);
5843 HiOps[2] = Lo.getValue(1);
5844 Hi = DAG.getNode(Node->getOpcode(), VTList, HiOps, 3);
5846 // Remember that we legalized the flag.
5847 AddLegalizedOperand(Op.getValue(1), LegalizeOp(Hi.getValue(1)));
5851 // If the target wants to custom expand this, let them.
5852 if (TLI.getOperationAction(ISD::MUL, VT) == TargetLowering::Custom) {
5853 SDOperand New = TLI.LowerOperation(Op, DAG);
5855 ExpandOp(New, Lo, Hi);
5860 bool HasMULHS = TLI.isOperationLegal(ISD::MULHS, NVT);
5861 bool HasMULHU = TLI.isOperationLegal(ISD::MULHU, NVT);
5862 bool HasSMUL_LOHI = TLI.isOperationLegal(ISD::SMUL_LOHI, NVT);
5863 bool HasUMUL_LOHI = TLI.isOperationLegal(ISD::UMUL_LOHI, NVT);
5864 if (HasMULHU || HasMULHS || HasUMUL_LOHI || HasSMUL_LOHI) {
5865 SDOperand LL, LH, RL, RH;
5866 ExpandOp(Node->getOperand(0), LL, LH);
5867 ExpandOp(Node->getOperand(1), RL, RH);
5868 unsigned BitSize = MVT::getSizeInBits(RH.getValueType());
5869 unsigned LHSSB = DAG.ComputeNumSignBits(Op.getOperand(0));
5870 unsigned RHSSB = DAG.ComputeNumSignBits(Op.getOperand(1));
5871 // FIXME: generalize this to handle other bit sizes
5872 if (LHSSB == 32 && RHSSB == 32 &&
5873 DAG.MaskedValueIsZero(Op.getOperand(0), 0xFFFFFFFF00000000ULL) &&
5874 DAG.MaskedValueIsZero(Op.getOperand(1), 0xFFFFFFFF00000000ULL)) {
5875 // The inputs are both zero-extended.
5877 // We can emit a umul_lohi.
5878 Lo = DAG.getNode(ISD::UMUL_LOHI, DAG.getVTList(NVT, NVT), LL, RL);
5879 Hi = SDOperand(Lo.Val, 1);
5883 // We can emit a mulhu+mul.
5884 Lo = DAG.getNode(ISD::MUL, NVT, LL, RL);
5885 Hi = DAG.getNode(ISD::MULHU, NVT, LL, RL);
5889 if (LHSSB > BitSize && RHSSB > BitSize) {
5890 // The input values are both sign-extended.
5892 // We can emit a smul_lohi.
5893 Lo = DAG.getNode(ISD::SMUL_LOHI, DAG.getVTList(NVT, NVT), LL, RL);
5894 Hi = SDOperand(Lo.Val, 1);
5898 // We can emit a mulhs+mul.
5899 Lo = DAG.getNode(ISD::MUL, NVT, LL, RL);
5900 Hi = DAG.getNode(ISD::MULHS, NVT, LL, RL);
5905 // Lo,Hi = umul LHS, RHS.
5906 SDOperand UMulLOHI = DAG.getNode(ISD::UMUL_LOHI,
5907 DAG.getVTList(NVT, NVT), LL, RL);
5909 Hi = UMulLOHI.getValue(1);
5910 RH = DAG.getNode(ISD::MUL, NVT, LL, RH);
5911 LH = DAG.getNode(ISD::MUL, NVT, LH, RL);
5912 Hi = DAG.getNode(ISD::ADD, NVT, Hi, RH);
5913 Hi = DAG.getNode(ISD::ADD, NVT, Hi, LH);
5918 // If nothing else, we can make a libcall.
5919 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::MUL_I64), Node,
5920 false/*sign irrelevant*/, Hi);
5924 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::SDIV_I64), Node, true, Hi);
5927 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::UDIV_I64), Node, true, Hi);
5930 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::SREM_I64), Node, true, Hi);
5933 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::UREM_I64), Node, true, Hi);
5937 Lo = ExpandLibCall(TLI.getLibcallName(VT == MVT::f32 ? RTLIB::ADD_F32 :
5938 VT == MVT::f64 ? RTLIB::ADD_F64 :
5939 VT == MVT::ppcf128 ?
5940 RTLIB::ADD_PPCF128 :
5941 RTLIB::UNKNOWN_LIBCALL),
5945 Lo = ExpandLibCall(TLI.getLibcallName(VT == MVT::f32 ? RTLIB::SUB_F32 :
5946 VT == MVT::f64 ? RTLIB::SUB_F64 :
5947 VT == MVT::ppcf128 ?
5948 RTLIB::SUB_PPCF128 :
5949 RTLIB::UNKNOWN_LIBCALL),
5953 Lo = ExpandLibCall(TLI.getLibcallName(VT == MVT::f32 ? RTLIB::MUL_F32 :
5954 VT == MVT::f64 ? RTLIB::MUL_F64 :
5955 VT == MVT::ppcf128 ?
5956 RTLIB::MUL_PPCF128 :
5957 RTLIB::UNKNOWN_LIBCALL),
5961 Lo = ExpandLibCall(TLI.getLibcallName(VT == MVT::f32 ? RTLIB::DIV_F32 :
5962 VT == MVT::f64 ? RTLIB::DIV_F64 :
5963 VT == MVT::ppcf128 ?
5964 RTLIB::DIV_PPCF128 :
5965 RTLIB::UNKNOWN_LIBCALL),
5968 case ISD::FP_EXTEND:
5969 if (VT == MVT::ppcf128) {
5970 assert(Node->getOperand(0).getValueType()==MVT::f32 ||
5971 Node->getOperand(0).getValueType()==MVT::f64);
5972 const uint64_t zero = 0;
5973 if (Node->getOperand(0).getValueType()==MVT::f32)
5974 Hi = DAG.getNode(ISD::FP_EXTEND, MVT::f64, Node->getOperand(0));
5976 Hi = Node->getOperand(0);
5977 Lo = DAG.getConstantFP(APFloat(APInt(64, 1, &zero)), MVT::f64);
5980 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::FPEXT_F32_F64), Node, true,Hi);
5983 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::FPROUND_F64_F32),Node,true,Hi);
5986 Lo = ExpandLibCall(TLI.getLibcallName((VT == MVT::f32) ? RTLIB::POWI_F32 :
5987 (VT == MVT::f64) ? RTLIB::POWI_F64 :
5988 (VT == MVT::f80) ? RTLIB::POWI_F80 :
5989 (VT == MVT::ppcf128) ?
5990 RTLIB::POWI_PPCF128 :
5991 RTLIB::UNKNOWN_LIBCALL),
5997 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
5998 switch(Node->getOpcode()) {
6000 LC = (VT == MVT::f32) ? RTLIB::SQRT_F32 :
6001 (VT == MVT::f64) ? RTLIB::SQRT_F64 :
6002 (VT == MVT::f80) ? RTLIB::SQRT_F80 :
6003 (VT == MVT::ppcf128) ? RTLIB::SQRT_PPCF128 :
6004 RTLIB::UNKNOWN_LIBCALL;
6007 LC = (VT == MVT::f32) ? RTLIB::SIN_F32 : RTLIB::SIN_F64;
6010 LC = (VT == MVT::f32) ? RTLIB::COS_F32 : RTLIB::COS_F64;
6012 default: assert(0 && "Unreachable!");
6014 Lo = ExpandLibCall(TLI.getLibcallName(LC), Node, false, Hi);
6018 if (VT == MVT::ppcf128) {
6020 ExpandOp(Node->getOperand(0), Lo, Tmp);
6021 Hi = DAG.getNode(ISD::FABS, NVT, Tmp);
6022 // lo = hi==fabs(hi) ? lo : -lo;
6023 Lo = DAG.getNode(ISD::SELECT_CC, NVT, Hi, Tmp,
6024 Lo, DAG.getNode(ISD::FNEG, NVT, Lo),
6025 DAG.getCondCode(ISD::SETEQ));
6028 SDOperand Mask = (VT == MVT::f64)
6029 ? DAG.getConstantFP(BitsToDouble(~(1ULL << 63)), VT)
6030 : DAG.getConstantFP(BitsToFloat(~(1U << 31)), VT);
6031 Mask = DAG.getNode(ISD::BIT_CONVERT, NVT, Mask);
6032 Lo = DAG.getNode(ISD::BIT_CONVERT, NVT, Node->getOperand(0));
6033 Lo = DAG.getNode(ISD::AND, NVT, Lo, Mask);
6034 if (getTypeAction(NVT) == Expand)
6035 ExpandOp(Lo, Lo, Hi);
6039 if (VT == MVT::ppcf128) {
6040 ExpandOp(Node->getOperand(0), Lo, Hi);
6041 Lo = DAG.getNode(ISD::FNEG, MVT::f64, Lo);
6042 Hi = DAG.getNode(ISD::FNEG, MVT::f64, Hi);
6045 SDOperand Mask = (VT == MVT::f64)
6046 ? DAG.getConstantFP(BitsToDouble(1ULL << 63), VT)
6047 : DAG.getConstantFP(BitsToFloat(1U << 31), VT);
6048 Mask = DAG.getNode(ISD::BIT_CONVERT, NVT, Mask);
6049 Lo = DAG.getNode(ISD::BIT_CONVERT, NVT, Node->getOperand(0));
6050 Lo = DAG.getNode(ISD::XOR, NVT, Lo, Mask);
6051 if (getTypeAction(NVT) == Expand)
6052 ExpandOp(Lo, Lo, Hi);
6055 case ISD::FCOPYSIGN: {
6056 Lo = ExpandFCOPYSIGNToBitwiseOps(Node, NVT, DAG, TLI);
6057 if (getTypeAction(NVT) == Expand)
6058 ExpandOp(Lo, Lo, Hi);
6061 case ISD::SINT_TO_FP:
6062 case ISD::UINT_TO_FP: {
6063 bool isSigned = Node->getOpcode() == ISD::SINT_TO_FP;
6064 MVT::ValueType SrcVT = Node->getOperand(0).getValueType();
6065 if (VT == MVT::ppcf128 && SrcVT != MVT::i64) {
6066 static uint64_t zero = 0;
6068 Hi = LegalizeOp(DAG.getNode(ISD::SINT_TO_FP, MVT::f64,
6069 Node->getOperand(0)));
6070 Lo = DAG.getConstantFP(APFloat(APInt(64, 1, &zero)), MVT::f64);
6072 static uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
6073 Hi = LegalizeOp(DAG.getNode(ISD::SINT_TO_FP, MVT::f64,
6074 Node->getOperand(0)));
6075 Lo = DAG.getConstantFP(APFloat(APInt(64, 1, &zero)), MVT::f64);
6076 Hi = DAG.getNode(ISD::BUILD_PAIR, VT, Lo, Hi);
6077 // X>=0 ? {(f64)x, 0} : {(f64)x, 0} + 2^32
6078 ExpandOp(DAG.getNode(ISD::SELECT_CC, MVT::ppcf128, Node->getOperand(0),
6079 DAG.getConstant(0, MVT::i32),
6080 DAG.getNode(ISD::FADD, MVT::ppcf128, Hi,
6082 APFloat(APInt(128, 2, TwoE32)),
6085 DAG.getCondCode(ISD::SETLT)),
6090 if (VT == MVT::ppcf128 && SrcVT == MVT::i64 && !isSigned) {
6091 // si64->ppcf128 done by libcall, below
6092 static uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
6093 ExpandOp(DAG.getNode(ISD::SINT_TO_FP, MVT::ppcf128, Node->getOperand(0)),
6095 Hi = DAG.getNode(ISD::BUILD_PAIR, VT, Lo, Hi);
6096 // x>=0 ? (ppcf128)(i64)x : (ppcf128)(i64)x + 2^64
6097 ExpandOp(DAG.getNode(ISD::SELECT_CC, MVT::ppcf128, Node->getOperand(0),
6098 DAG.getConstant(0, MVT::i64),
6099 DAG.getNode(ISD::FADD, MVT::ppcf128, Hi,
6101 APFloat(APInt(128, 2, TwoE64)),
6104 DAG.getCondCode(ISD::SETLT)),
6108 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
6109 if (Node->getOperand(0).getValueType() == MVT::i64) {
6111 LC = isSigned ? RTLIB::SINTTOFP_I64_F32 : RTLIB::UINTTOFP_I64_F32;
6112 else if (VT == MVT::f64)
6113 LC = isSigned ? RTLIB::SINTTOFP_I64_F64 : RTLIB::UINTTOFP_I64_F64;
6114 else if (VT == MVT::f80) {
6116 LC = RTLIB::SINTTOFP_I64_F80;
6118 else if (VT == MVT::ppcf128) {
6120 LC = RTLIB::SINTTOFP_I64_PPCF128;
6124 LC = isSigned ? RTLIB::SINTTOFP_I32_F32 : RTLIB::UINTTOFP_I32_F32;
6126 LC = isSigned ? RTLIB::SINTTOFP_I32_F64 : RTLIB::UINTTOFP_I32_F64;
6129 // Promote the operand if needed.
6130 if (getTypeAction(SrcVT) == Promote) {
6131 SDOperand Tmp = PromoteOp(Node->getOperand(0));
6133 ? DAG.getNode(ISD::SIGN_EXTEND_INREG, Tmp.getValueType(), Tmp,
6134 DAG.getValueType(SrcVT))
6135 : DAG.getZeroExtendInReg(Tmp, SrcVT);
6136 Node = DAG.UpdateNodeOperands(Op, Tmp).Val;
6139 const char *LibCall = TLI.getLibcallName(LC);
6141 Lo = ExpandLibCall(TLI.getLibcallName(LC), Node, isSigned, Hi);
6143 Lo = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP, VT,
6144 Node->getOperand(0));
6145 if (getTypeAction(Lo.getValueType()) == Expand)
6146 ExpandOp(Lo, Lo, Hi);
6152 // Make sure the resultant values have been legalized themselves, unless this
6153 // is a type that requires multi-step expansion.
6154 if (getTypeAction(NVT) != Expand && NVT != MVT::isVoid) {
6155 Lo = LegalizeOp(Lo);
6157 // Don't legalize the high part if it is expanded to a single node.
6158 Hi = LegalizeOp(Hi);
6161 // Remember in a map if the values will be reused later.
6162 bool isNew = ExpandedNodes.insert(std::make_pair(Op, std::make_pair(Lo, Hi)));
6163 assert(isNew && "Value already expanded?!?");
6166 /// SplitVectorOp - Given an operand of vector type, break it down into
6167 /// two smaller values, still of vector type.
6168 void SelectionDAGLegalize::SplitVectorOp(SDOperand Op, SDOperand &Lo,
6170 assert(MVT::isVector(Op.getValueType()) && "Cannot split non-vector type!");
6171 SDNode *Node = Op.Val;
6172 unsigned NumElements = MVT::getVectorNumElements(Op.getValueType());
6173 assert(NumElements > 1 && "Cannot split a single element vector!");
6174 unsigned NewNumElts = NumElements/2;
6175 MVT::ValueType NewEltVT = MVT::getVectorElementType(Op.getValueType());
6176 MVT::ValueType NewVT = MVT::getVectorType(NewEltVT, NewNumElts);
6178 // See if we already split it.
6179 std::map<SDOperand, std::pair<SDOperand, SDOperand> >::iterator I
6180 = SplitNodes.find(Op);
6181 if (I != SplitNodes.end()) {
6182 Lo = I->second.first;
6183 Hi = I->second.second;
6187 switch (Node->getOpcode()) {
6192 assert(0 && "Unhandled operation in SplitVectorOp!");
6193 case ISD::BUILD_PAIR:
6194 Lo = Node->getOperand(0);
6195 Hi = Node->getOperand(1);
6197 case ISD::INSERT_VECTOR_ELT: {
6198 SplitVectorOp(Node->getOperand(0), Lo, Hi);
6199 unsigned Index = cast<ConstantSDNode>(Node->getOperand(2))->getValue();
6200 SDOperand ScalarOp = Node->getOperand(1);
6201 if (Index < NewNumElts)
6202 Lo = DAG.getNode(ISD::INSERT_VECTOR_ELT, NewVT, Lo, ScalarOp,
6203 DAG.getConstant(Index, TLI.getPointerTy()));
6205 Hi = DAG.getNode(ISD::INSERT_VECTOR_ELT, NewVT, Hi, ScalarOp,
6206 DAG.getConstant(Index - NewNumElts, TLI.getPointerTy()));
6209 case ISD::BUILD_VECTOR: {
6210 SmallVector<SDOperand, 8> LoOps(Node->op_begin(),
6211 Node->op_begin()+NewNumElts);
6212 Lo = DAG.getNode(ISD::BUILD_VECTOR, NewVT, &LoOps[0], LoOps.size());
6214 SmallVector<SDOperand, 8> HiOps(Node->op_begin()+NewNumElts,
6216 Hi = DAG.getNode(ISD::BUILD_VECTOR, NewVT, &HiOps[0], HiOps.size());
6219 case ISD::CONCAT_VECTORS: {
6220 unsigned NewNumSubvectors = Node->getNumOperands() / 2;
6221 if (NewNumSubvectors == 1) {
6222 Lo = Node->getOperand(0);
6223 Hi = Node->getOperand(1);
6225 SmallVector<SDOperand, 8> LoOps(Node->op_begin(),
6226 Node->op_begin()+NewNumSubvectors);
6227 Lo = DAG.getNode(ISD::CONCAT_VECTORS, NewVT, &LoOps[0], LoOps.size());
6229 SmallVector<SDOperand, 8> HiOps(Node->op_begin()+NewNumSubvectors,
6231 Hi = DAG.getNode(ISD::CONCAT_VECTORS, NewVT, &HiOps[0], HiOps.size());
6236 SDOperand Cond = Node->getOperand(0);
6238 SDOperand LL, LH, RL, RH;
6239 SplitVectorOp(Node->getOperand(1), LL, LH);
6240 SplitVectorOp(Node->getOperand(2), RL, RH);
6242 if (MVT::isVector(Cond.getValueType())) {
6243 // Handle a vector merge.
6245 SplitVectorOp(Cond, CL, CH);
6246 Lo = DAG.getNode(Node->getOpcode(), NewVT, CL, LL, RL);
6247 Hi = DAG.getNode(Node->getOpcode(), NewVT, CH, LH, RH);
6249 // Handle a simple select with vector operands.
6250 Lo = DAG.getNode(Node->getOpcode(), NewVT, Cond, LL, RL);
6251 Hi = DAG.getNode(Node->getOpcode(), NewVT, Cond, LH, RH);
6268 SDOperand LL, LH, RL, RH;
6269 SplitVectorOp(Node->getOperand(0), LL, LH);
6270 SplitVectorOp(Node->getOperand(1), RL, RH);
6272 Lo = DAG.getNode(Node->getOpcode(), NewVT, LL, RL);
6273 Hi = DAG.getNode(Node->getOpcode(), NewVT, LH, RH);
6278 SplitVectorOp(Node->getOperand(0), L, H);
6280 Lo = DAG.getNode(Node->getOpcode(), NewVT, L, Node->getOperand(1));
6281 Hi = DAG.getNode(Node->getOpcode(), NewVT, H, Node->getOperand(1));
6293 SplitVectorOp(Node->getOperand(0), L, H);
6295 Lo = DAG.getNode(Node->getOpcode(), NewVT, L);
6296 Hi = DAG.getNode(Node->getOpcode(), NewVT, H);
6300 LoadSDNode *LD = cast<LoadSDNode>(Node);
6301 SDOperand Ch = LD->getChain();
6302 SDOperand Ptr = LD->getBasePtr();
6303 const Value *SV = LD->getSrcValue();
6304 int SVOffset = LD->getSrcValueOffset();
6305 unsigned Alignment = LD->getAlignment();
6306 bool isVolatile = LD->isVolatile();
6308 Lo = DAG.getLoad(NewVT, Ch, Ptr, SV, SVOffset, isVolatile, Alignment);
6309 unsigned IncrementSize = NewNumElts * MVT::getSizeInBits(NewEltVT)/8;
6310 Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
6311 getIntPtrConstant(IncrementSize));
6312 SVOffset += IncrementSize;
6313 if (Alignment > IncrementSize)
6314 Alignment = IncrementSize;
6315 Hi = DAG.getLoad(NewVT, Ch, Ptr, SV, SVOffset, isVolatile, Alignment);
6317 // Build a factor node to remember that this load is independent of the
6319 SDOperand TF = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo.getValue(1),
6322 // Remember that we legalized the chain.
6323 AddLegalizedOperand(Op.getValue(1), LegalizeOp(TF));
6326 case ISD::BIT_CONVERT: {
6327 // We know the result is a vector. The input may be either a vector or a
6329 SDOperand InOp = Node->getOperand(0);
6330 if (!MVT::isVector(InOp.getValueType()) ||
6331 MVT::getVectorNumElements(InOp.getValueType()) == 1) {
6332 // The input is a scalar or single-element vector.
6333 // Lower to a store/load so that it can be split.
6334 // FIXME: this could be improved probably.
6335 SDOperand Ptr = DAG.CreateStackTemporary(InOp.getValueType());
6337 SDOperand St = DAG.getStore(DAG.getEntryNode(),
6338 InOp, Ptr, NULL, 0);
6339 InOp = DAG.getLoad(Op.getValueType(), St, Ptr, NULL, 0);
6341 // Split the vector and convert each of the pieces now.
6342 SplitVectorOp(InOp, Lo, Hi);
6343 Lo = DAG.getNode(ISD::BIT_CONVERT, NewVT, Lo);
6344 Hi = DAG.getNode(ISD::BIT_CONVERT, NewVT, Hi);
6349 // Remember in a map if the values will be reused later.
6351 SplitNodes.insert(std::make_pair(Op, std::make_pair(Lo, Hi))).second;
6352 assert(isNew && "Value already split?!?");
6356 /// ScalarizeVectorOp - Given an operand of single-element vector type
6357 /// (e.g. v1f32), convert it into the equivalent operation that returns a
6358 /// scalar (e.g. f32) value.
6359 SDOperand SelectionDAGLegalize::ScalarizeVectorOp(SDOperand Op) {
6360 assert(MVT::isVector(Op.getValueType()) &&
6361 "Bad ScalarizeVectorOp invocation!");
6362 SDNode *Node = Op.Val;
6363 MVT::ValueType NewVT = MVT::getVectorElementType(Op.getValueType());
6364 assert(MVT::getVectorNumElements(Op.getValueType()) == 1);
6366 // See if we already scalarized it.
6367 std::map<SDOperand, SDOperand>::iterator I = ScalarizedNodes.find(Op);
6368 if (I != ScalarizedNodes.end()) return I->second;
6371 switch (Node->getOpcode()) {
6374 Node->dump(&DAG); cerr << "\n";
6376 assert(0 && "Unknown vector operation in ScalarizeVectorOp!");
6393 Result = DAG.getNode(Node->getOpcode(),
6395 ScalarizeVectorOp(Node->getOperand(0)),
6396 ScalarizeVectorOp(Node->getOperand(1)));
6403 Result = DAG.getNode(Node->getOpcode(),
6405 ScalarizeVectorOp(Node->getOperand(0)));
6408 Result = DAG.getNode(Node->getOpcode(),
6410 ScalarizeVectorOp(Node->getOperand(0)),
6411 Node->getOperand(1));
6414 LoadSDNode *LD = cast<LoadSDNode>(Node);
6415 SDOperand Ch = LegalizeOp(LD->getChain()); // Legalize the chain.
6416 SDOperand Ptr = LegalizeOp(LD->getBasePtr()); // Legalize the pointer.
6418 const Value *SV = LD->getSrcValue();
6419 int SVOffset = LD->getSrcValueOffset();
6420 Result = DAG.getLoad(NewVT, Ch, Ptr, SV, SVOffset,
6421 LD->isVolatile(), LD->getAlignment());
6423 // Remember that we legalized the chain.
6424 AddLegalizedOperand(Op.getValue(1), LegalizeOp(Result.getValue(1)));
6427 case ISD::BUILD_VECTOR:
6428 Result = Node->getOperand(0);
6430 case ISD::INSERT_VECTOR_ELT:
6431 // Returning the inserted scalar element.
6432 Result = Node->getOperand(1);
6434 case ISD::CONCAT_VECTORS:
6435 assert(Node->getOperand(0).getValueType() == NewVT &&
6436 "Concat of non-legal vectors not yet supported!");
6437 Result = Node->getOperand(0);
6439 case ISD::VECTOR_SHUFFLE: {
6440 // Figure out if the scalar is the LHS or RHS and return it.
6441 SDOperand EltNum = Node->getOperand(2).getOperand(0);
6442 if (cast<ConstantSDNode>(EltNum)->getValue())
6443 Result = ScalarizeVectorOp(Node->getOperand(1));
6445 Result = ScalarizeVectorOp(Node->getOperand(0));
6448 case ISD::EXTRACT_SUBVECTOR:
6449 Result = Node->getOperand(0);
6450 assert(Result.getValueType() == NewVT);
6452 case ISD::BIT_CONVERT:
6453 Result = DAG.getNode(ISD::BIT_CONVERT, NewVT, Op.getOperand(0));
6456 Result = DAG.getNode(ISD::SELECT, NewVT, Op.getOperand(0),
6457 ScalarizeVectorOp(Op.getOperand(1)),
6458 ScalarizeVectorOp(Op.getOperand(2)));
6462 if (TLI.isTypeLegal(NewVT))
6463 Result = LegalizeOp(Result);
6464 bool isNew = ScalarizedNodes.insert(std::make_pair(Op, Result)).second;
6465 assert(isNew && "Value already scalarized?");
6470 // SelectionDAG::Legalize - This is the entry point for the file.
6472 void SelectionDAG::Legalize() {
6473 if (ViewLegalizeDAGs) viewGraph();
6475 /// run - This is the main entry point to this class.
6477 SelectionDAGLegalize(*this).LegalizeDAG();