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 /// PromoteOp - Given an operation that produces a value in an invalid type,
151 /// promote it to compute the value into a larger type. The produced value
152 /// will have the correct bits for the low portion of the register, but no
153 /// guarantee is made about the top bits: it may be zero, sign-extended, or
155 SDOperand PromoteOp(SDOperand O);
157 /// ExpandOp - Expand the specified SDOperand into its two component pieces
158 /// Lo&Hi. Note that the Op MUST be an expanded type. As a result of this,
159 /// the LegalizeNodes map is filled in for any results that are not expanded,
160 /// the ExpandedNodes map is filled in for any results that are expanded, and
161 /// the Lo/Hi values are returned. This applies to integer types and Vector
163 void ExpandOp(SDOperand O, SDOperand &Lo, SDOperand &Hi);
165 /// SplitVectorOp - Given an operand of vector type, break it down into
166 /// two smaller values.
167 void SplitVectorOp(SDOperand O, SDOperand &Lo, SDOperand &Hi);
169 /// ScalarizeVectorOp - Given an operand of single-element vector type
170 /// (e.g. v1f32), convert it into the equivalent operation that returns a
171 /// scalar (e.g. f32) value.
172 SDOperand ScalarizeVectorOp(SDOperand O);
174 /// isShuffleLegal - Return true if a vector shuffle is legal with the
175 /// specified mask and type. Targets can specify exactly which masks they
176 /// support and the code generator is tasked with not creating illegal masks.
178 /// Note that this will also return true for shuffles that are promoted to a
181 /// If this is a legal shuffle, this method returns the (possibly promoted)
182 /// build_vector Mask. If it's not a legal shuffle, it returns null.
183 SDNode *isShuffleLegal(MVT::ValueType VT, SDOperand Mask) const;
185 bool LegalizeAllNodesNotLeadingTo(SDNode *N, SDNode *Dest,
186 SmallPtrSet<SDNode*, 32> &NodesLeadingTo);
188 void LegalizeSetCCOperands(SDOperand &LHS, SDOperand &RHS, SDOperand &CC);
190 SDOperand CreateStackTemporary(MVT::ValueType VT);
192 SDOperand ExpandLibCall(const char *Name, SDNode *Node, bool isSigned,
194 SDOperand ExpandIntToFP(bool isSigned, MVT::ValueType DestTy,
197 SDOperand ExpandBIT_CONVERT(MVT::ValueType DestVT, SDOperand SrcOp);
198 SDOperand ExpandBUILD_VECTOR(SDNode *Node);
199 SDOperand ExpandSCALAR_TO_VECTOR(SDNode *Node);
200 SDOperand ExpandLegalINT_TO_FP(bool isSigned,
202 MVT::ValueType DestVT);
203 SDOperand PromoteLegalINT_TO_FP(SDOperand LegalOp, MVT::ValueType DestVT,
205 SDOperand PromoteLegalFP_TO_INT(SDOperand LegalOp, MVT::ValueType DestVT,
208 SDOperand ExpandBSWAP(SDOperand Op);
209 SDOperand ExpandBitCount(unsigned Opc, SDOperand Op);
210 bool ExpandShift(unsigned Opc, SDOperand Op, SDOperand Amt,
211 SDOperand &Lo, SDOperand &Hi);
212 void ExpandShiftParts(unsigned NodeOp, SDOperand Op, SDOperand Amt,
213 SDOperand &Lo, SDOperand &Hi);
215 SDOperand ExpandEXTRACT_SUBVECTOR(SDOperand Op);
216 SDOperand ExpandEXTRACT_VECTOR_ELT(SDOperand Op);
218 SDOperand getIntPtrConstant(uint64_t Val) {
219 return DAG.getConstant(Val, TLI.getPointerTy());
224 /// isVectorShuffleLegal - Return true if a vector shuffle is legal with the
225 /// specified mask and type. Targets can specify exactly which masks they
226 /// support and the code generator is tasked with not creating illegal masks.
228 /// Note that this will also return true for shuffles that are promoted to a
230 SDNode *SelectionDAGLegalize::isShuffleLegal(MVT::ValueType VT,
231 SDOperand Mask) const {
232 switch (TLI.getOperationAction(ISD::VECTOR_SHUFFLE, VT)) {
234 case TargetLowering::Legal:
235 case TargetLowering::Custom:
237 case TargetLowering::Promote: {
238 // If this is promoted to a different type, convert the shuffle mask and
239 // ask if it is legal in the promoted type!
240 MVT::ValueType NVT = TLI.getTypeToPromoteTo(ISD::VECTOR_SHUFFLE, VT);
242 // If we changed # elements, change the shuffle mask.
243 unsigned NumEltsGrowth =
244 MVT::getVectorNumElements(NVT) / MVT::getVectorNumElements(VT);
245 assert(NumEltsGrowth && "Cannot promote to vector type with fewer elts!");
246 if (NumEltsGrowth > 1) {
247 // Renumber the elements.
248 SmallVector<SDOperand, 8> Ops;
249 for (unsigned i = 0, e = Mask.getNumOperands(); i != e; ++i) {
250 SDOperand InOp = Mask.getOperand(i);
251 for (unsigned j = 0; j != NumEltsGrowth; ++j) {
252 if (InOp.getOpcode() == ISD::UNDEF)
253 Ops.push_back(DAG.getNode(ISD::UNDEF, MVT::i32));
255 unsigned InEltNo = cast<ConstantSDNode>(InOp)->getValue();
256 Ops.push_back(DAG.getConstant(InEltNo*NumEltsGrowth+j, MVT::i32));
260 Mask = DAG.getNode(ISD::BUILD_VECTOR, NVT, &Ops[0], Ops.size());
266 return TLI.isShuffleMaskLegal(Mask, VT) ? Mask.Val : 0;
269 SelectionDAGLegalize::SelectionDAGLegalize(SelectionDAG &dag)
270 : TLI(dag.getTargetLoweringInfo()), DAG(dag),
271 ValueTypeActions(TLI.getValueTypeActions()) {
272 assert(MVT::LAST_VALUETYPE <= 32 &&
273 "Too many value types for ValueTypeActions to hold!");
276 /// ComputeTopDownOrdering - Compute a top-down ordering of the dag, where Order
277 /// contains all of a nodes operands before it contains the node.
278 static void ComputeTopDownOrdering(SelectionDAG &DAG,
279 SmallVector<SDNode*, 64> &Order) {
281 DenseMap<SDNode*, unsigned> Visited;
282 std::vector<SDNode*> Worklist;
283 Worklist.reserve(128);
285 // Compute ordering from all of the leaves in the graphs, those (like the
286 // entry node) that have no operands.
287 for (SelectionDAG::allnodes_iterator I = DAG.allnodes_begin(),
288 E = DAG.allnodes_end(); I != E; ++I) {
289 if (I->getNumOperands() == 0) {
291 Worklist.push_back(I);
295 while (!Worklist.empty()) {
296 SDNode *N = Worklist.back();
299 if (++Visited[N] != N->getNumOperands())
300 continue; // Haven't visited all operands yet
304 // Now that we have N in, add anything that uses it if all of their operands
306 for (SDNode::use_iterator UI = N->use_begin(), E = N->use_end();
308 Worklist.push_back(*UI);
311 assert(Order.size() == Visited.size() &&
313 (unsigned)std::distance(DAG.allnodes_begin(), DAG.allnodes_end()) &&
314 "Error: DAG is cyclic!");
318 void SelectionDAGLegalize::LegalizeDAG() {
319 LastCALLSEQ_END = DAG.getEntryNode();
320 IsLegalizingCall = false;
322 // The legalize process is inherently a bottom-up recursive process (users
323 // legalize their uses before themselves). Given infinite stack space, we
324 // could just start legalizing on the root and traverse the whole graph. In
325 // practice however, this causes us to run out of stack space on large basic
326 // blocks. To avoid this problem, compute an ordering of the nodes where each
327 // node is only legalized after all of its operands are legalized.
328 SmallVector<SDNode*, 64> Order;
329 ComputeTopDownOrdering(DAG, Order);
331 for (unsigned i = 0, e = Order.size(); i != e; ++i)
332 HandleOp(SDOperand(Order[i], 0));
334 // Finally, it's possible the root changed. Get the new root.
335 SDOperand OldRoot = DAG.getRoot();
336 assert(LegalizedNodes.count(OldRoot) && "Root didn't get legalized?");
337 DAG.setRoot(LegalizedNodes[OldRoot]);
339 ExpandedNodes.clear();
340 LegalizedNodes.clear();
341 PromotedNodes.clear();
343 ScalarizedNodes.clear();
345 // Remove dead nodes now.
346 DAG.RemoveDeadNodes();
350 /// FindCallEndFromCallStart - Given a chained node that is part of a call
351 /// sequence, find the CALLSEQ_END node that terminates the call sequence.
352 static SDNode *FindCallEndFromCallStart(SDNode *Node) {
353 if (Node->getOpcode() == ISD::CALLSEQ_END)
355 if (Node->use_empty())
356 return 0; // No CallSeqEnd
358 // The chain is usually at the end.
359 SDOperand TheChain(Node, Node->getNumValues()-1);
360 if (TheChain.getValueType() != MVT::Other) {
361 // Sometimes it's at the beginning.
362 TheChain = SDOperand(Node, 0);
363 if (TheChain.getValueType() != MVT::Other) {
364 // Otherwise, hunt for it.
365 for (unsigned i = 1, e = Node->getNumValues(); i != e; ++i)
366 if (Node->getValueType(i) == MVT::Other) {
367 TheChain = SDOperand(Node, i);
371 // Otherwise, we walked into a node without a chain.
372 if (TheChain.getValueType() != MVT::Other)
377 for (SDNode::use_iterator UI = Node->use_begin(),
378 E = Node->use_end(); UI != E; ++UI) {
380 // Make sure to only follow users of our token chain.
382 for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i)
383 if (User->getOperand(i) == TheChain)
384 if (SDNode *Result = FindCallEndFromCallStart(User))
390 /// FindCallStartFromCallEnd - Given a chained node that is part of a call
391 /// sequence, find the CALLSEQ_START node that initiates the call sequence.
392 static SDNode *FindCallStartFromCallEnd(SDNode *Node) {
393 assert(Node && "Didn't find callseq_start for a call??");
394 if (Node->getOpcode() == ISD::CALLSEQ_START) return Node;
396 assert(Node->getOperand(0).getValueType() == MVT::Other &&
397 "Node doesn't have a token chain argument!");
398 return FindCallStartFromCallEnd(Node->getOperand(0).Val);
401 /// LegalizeAllNodesNotLeadingTo - Recursively walk the uses of N, looking to
402 /// see if any uses can reach Dest. If no dest operands can get to dest,
403 /// legalize them, legalize ourself, and return false, otherwise, return true.
405 /// Keep track of the nodes we fine that actually do lead to Dest in
406 /// NodesLeadingTo. This avoids retraversing them exponential number of times.
408 bool SelectionDAGLegalize::LegalizeAllNodesNotLeadingTo(SDNode *N, SDNode *Dest,
409 SmallPtrSet<SDNode*, 32> &NodesLeadingTo) {
410 if (N == Dest) return true; // N certainly leads to Dest :)
412 // If we've already processed this node and it does lead to Dest, there is no
413 // need to reprocess it.
414 if (NodesLeadingTo.count(N)) return true;
416 // If the first result of this node has been already legalized, then it cannot
418 switch (getTypeAction(N->getValueType(0))) {
420 if (LegalizedNodes.count(SDOperand(N, 0))) return false;
423 if (PromotedNodes.count(SDOperand(N, 0))) return false;
426 if (ExpandedNodes.count(SDOperand(N, 0))) return false;
430 // Okay, this node has not already been legalized. Check and legalize all
431 // operands. If none lead to Dest, then we can legalize this node.
432 bool OperandsLeadToDest = false;
433 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
434 OperandsLeadToDest |= // If an operand leads to Dest, so do we.
435 LegalizeAllNodesNotLeadingTo(N->getOperand(i).Val, Dest, NodesLeadingTo);
437 if (OperandsLeadToDest) {
438 NodesLeadingTo.insert(N);
442 // Okay, this node looks safe, legalize it and return false.
443 HandleOp(SDOperand(N, 0));
447 /// HandleOp - Legalize, Promote, or Expand the specified operand as
448 /// appropriate for its type.
449 void SelectionDAGLegalize::HandleOp(SDOperand Op) {
450 MVT::ValueType VT = Op.getValueType();
451 switch (getTypeAction(VT)) {
452 default: assert(0 && "Bad type action!");
453 case Legal: (void)LegalizeOp(Op); break;
454 case Promote: (void)PromoteOp(Op); break;
456 if (!MVT::isVector(VT)) {
457 // If this is an illegal scalar, expand it into its two component
460 if (Op.getOpcode() == ISD::TargetConstant)
461 break; // Allow illegal target nodes.
463 } else if (MVT::getVectorNumElements(VT) == 1) {
464 // If this is an illegal single element vector, convert it to a
466 (void)ScalarizeVectorOp(Op);
468 // Otherwise, this is an illegal multiple element vector.
469 // Split it in half and legalize both parts.
471 SplitVectorOp(Op, X, Y);
477 /// ExpandConstantFP - Expands the ConstantFP node to an integer constant or
478 /// a load from the constant pool.
479 static SDOperand ExpandConstantFP(ConstantFPSDNode *CFP, bool UseCP,
480 SelectionDAG &DAG, TargetLowering &TLI) {
483 // If a FP immediate is precise when represented as a float and if the
484 // target can do an extending load from float to double, we put it into
485 // the constant pool as a float, even if it's is statically typed as a
487 MVT::ValueType VT = CFP->getValueType(0);
488 bool isDouble = VT == MVT::f64;
489 ConstantFP *LLVMC = ConstantFP::get(MVT::getTypeForValueType(VT),
492 if (VT!=MVT::f64 && VT!=MVT::f32)
493 assert(0 && "Invalid type expansion");
494 return DAG.getConstant(LLVMC->getValueAPF().convertToAPInt().getZExtValue(),
495 isDouble ? MVT::i64 : MVT::i32);
498 if (isDouble && CFP->isValueValidForType(MVT::f32, CFP->getValueAPF()) &&
499 // Only do this if the target has a native EXTLOAD instruction from f32.
500 // Do not try to be clever about long doubles (so far)
501 TLI.isLoadXLegal(ISD::EXTLOAD, MVT::f32)) {
502 LLVMC = cast<ConstantFP>(ConstantExpr::getFPTrunc(LLVMC,Type::FloatTy));
507 SDOperand CPIdx = DAG.getConstantPool(LLVMC, TLI.getPointerTy());
509 return DAG.getExtLoad(ISD::EXTLOAD, MVT::f64, DAG.getEntryNode(),
510 CPIdx, NULL, 0, MVT::f32);
512 return DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, NULL, 0);
517 /// ExpandFCOPYSIGNToBitwiseOps - Expands fcopysign to a series of bitwise
520 SDOperand ExpandFCOPYSIGNToBitwiseOps(SDNode *Node, MVT::ValueType NVT,
521 SelectionDAG &DAG, TargetLowering &TLI) {
522 MVT::ValueType VT = Node->getValueType(0);
523 MVT::ValueType SrcVT = Node->getOperand(1).getValueType();
524 assert((SrcVT == MVT::f32 || SrcVT == MVT::f64) &&
525 "fcopysign expansion only supported for f32 and f64");
526 MVT::ValueType SrcNVT = (SrcVT == MVT::f64) ? MVT::i64 : MVT::i32;
528 // First get the sign bit of second operand.
529 SDOperand Mask1 = (SrcVT == MVT::f64)
530 ? DAG.getConstantFP(BitsToDouble(1ULL << 63), SrcVT)
531 : DAG.getConstantFP(BitsToFloat(1U << 31), SrcVT);
532 Mask1 = DAG.getNode(ISD::BIT_CONVERT, SrcNVT, Mask1);
533 SDOperand SignBit= DAG.getNode(ISD::BIT_CONVERT, SrcNVT, Node->getOperand(1));
534 SignBit = DAG.getNode(ISD::AND, SrcNVT, SignBit, Mask1);
535 // Shift right or sign-extend it if the two operands have different types.
536 int SizeDiff = MVT::getSizeInBits(SrcNVT) - MVT::getSizeInBits(NVT);
538 SignBit = DAG.getNode(ISD::SRL, SrcNVT, SignBit,
539 DAG.getConstant(SizeDiff, TLI.getShiftAmountTy()));
540 SignBit = DAG.getNode(ISD::TRUNCATE, NVT, SignBit);
541 } else if (SizeDiff < 0)
542 SignBit = DAG.getNode(ISD::SIGN_EXTEND, NVT, SignBit);
544 // Clear the sign bit of first operand.
545 SDOperand Mask2 = (VT == MVT::f64)
546 ? DAG.getConstantFP(BitsToDouble(~(1ULL << 63)), VT)
547 : DAG.getConstantFP(BitsToFloat(~(1U << 31)), VT);
548 Mask2 = DAG.getNode(ISD::BIT_CONVERT, NVT, Mask2);
549 SDOperand Result = DAG.getNode(ISD::BIT_CONVERT, NVT, Node->getOperand(0));
550 Result = DAG.getNode(ISD::AND, NVT, Result, Mask2);
552 // Or the value with the sign bit.
553 Result = DAG.getNode(ISD::OR, NVT, Result, SignBit);
557 /// ExpandUnalignedStore - Expands an unaligned store to 2 half-size stores.
559 SDOperand ExpandUnalignedStore(StoreSDNode *ST, SelectionDAG &DAG,
560 TargetLowering &TLI) {
561 SDOperand Chain = ST->getChain();
562 SDOperand Ptr = ST->getBasePtr();
563 SDOperand Val = ST->getValue();
564 MVT::ValueType VT = Val.getValueType();
565 int Alignment = ST->getAlignment();
566 int SVOffset = ST->getSrcValueOffset();
567 if (MVT::isFloatingPoint(ST->getStoredVT())) {
568 // Expand to a bitconvert of the value to the integer type of the
569 // same size, then a (misaligned) int store.
570 MVT::ValueType intVT;
573 else if (VT==MVT::f32)
576 assert(0 && "Unaligned load of unsupported floating point type");
578 SDOperand Result = DAG.getNode(ISD::BIT_CONVERT, intVT, Val);
579 return DAG.getStore(Chain, Result, Ptr, ST->getSrcValue(),
580 SVOffset, ST->isVolatile(), Alignment);
582 assert(MVT::isInteger(ST->getStoredVT()) &&
583 "Unaligned store of unknown type.");
584 // Get the half-size VT
585 MVT::ValueType NewStoredVT = ST->getStoredVT() - 1;
586 int NumBits = MVT::getSizeInBits(NewStoredVT);
587 int IncrementSize = NumBits / 8;
589 // Divide the stored value in two parts.
590 SDOperand ShiftAmount = DAG.getConstant(NumBits, TLI.getShiftAmountTy());
592 SDOperand Hi = DAG.getNode(ISD::SRL, VT, Val, ShiftAmount);
594 // Store the two parts
595 SDOperand Store1, Store2;
596 Store1 = DAG.getTruncStore(Chain, TLI.isLittleEndian()?Lo:Hi, Ptr,
597 ST->getSrcValue(), SVOffset, NewStoredVT,
598 ST->isVolatile(), Alignment);
599 Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
600 DAG.getConstant(IncrementSize, TLI.getPointerTy()));
601 Store2 = DAG.getTruncStore(Chain, TLI.isLittleEndian()?Hi:Lo, Ptr,
602 ST->getSrcValue(), SVOffset + IncrementSize,
603 NewStoredVT, ST->isVolatile(), Alignment);
605 return DAG.getNode(ISD::TokenFactor, MVT::Other, Store1, Store2);
608 /// ExpandUnalignedLoad - Expands an unaligned load to 2 half-size loads.
610 SDOperand ExpandUnalignedLoad(LoadSDNode *LD, SelectionDAG &DAG,
611 TargetLowering &TLI) {
612 int SVOffset = LD->getSrcValueOffset();
613 SDOperand Chain = LD->getChain();
614 SDOperand Ptr = LD->getBasePtr();
615 MVT::ValueType VT = LD->getValueType(0);
616 MVT::ValueType LoadedVT = LD->getLoadedVT();
617 if (MVT::isFloatingPoint(VT)) {
618 // Expand to a (misaligned) integer load of the same size,
619 // then bitconvert to floating point.
620 MVT::ValueType intVT;
621 if (LoadedVT==MVT::f64)
623 else if (LoadedVT==MVT::f32)
626 assert(0 && "Unaligned load of unsupported floating point type");
628 SDOperand newLoad = DAG.getLoad(intVT, Chain, Ptr, LD->getSrcValue(),
629 SVOffset, LD->isVolatile(),
631 SDOperand Result = DAG.getNode(ISD::BIT_CONVERT, LoadedVT, newLoad);
633 Result = DAG.getNode(ISD::FP_EXTEND, VT, Result);
635 SDOperand Ops[] = { Result, Chain };
636 return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, MVT::Other),
639 assert(MVT::isInteger(LoadedVT) && "Unaligned load of unsupported type.");
640 MVT::ValueType NewLoadedVT = LoadedVT - 1;
641 int NumBits = MVT::getSizeInBits(NewLoadedVT);
642 int Alignment = LD->getAlignment();
643 int IncrementSize = NumBits / 8;
644 ISD::LoadExtType HiExtType = LD->getExtensionType();
646 // If the original load is NON_EXTLOAD, the hi part load must be ZEXTLOAD.
647 if (HiExtType == ISD::NON_EXTLOAD)
648 HiExtType = ISD::ZEXTLOAD;
650 // Load the value in two parts
652 if (TLI.isLittleEndian()) {
653 Lo = DAG.getExtLoad(ISD::ZEXTLOAD, VT, Chain, Ptr, LD->getSrcValue(),
654 SVOffset, NewLoadedVT, LD->isVolatile(), Alignment);
655 Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
656 DAG.getConstant(IncrementSize, TLI.getPointerTy()));
657 Hi = DAG.getExtLoad(HiExtType, VT, Chain, Ptr, LD->getSrcValue(),
658 SVOffset + IncrementSize, NewLoadedVT, LD->isVolatile(),
661 Hi = DAG.getExtLoad(HiExtType, VT, Chain, Ptr, LD->getSrcValue(), SVOffset,
662 NewLoadedVT,LD->isVolatile(), Alignment);
663 Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
664 DAG.getConstant(IncrementSize, TLI.getPointerTy()));
665 Lo = DAG.getExtLoad(ISD::ZEXTLOAD, VT, Chain, Ptr, LD->getSrcValue(),
666 SVOffset + IncrementSize, NewLoadedVT, LD->isVolatile(),
670 // aggregate the two parts
671 SDOperand ShiftAmount = DAG.getConstant(NumBits, TLI.getShiftAmountTy());
672 SDOperand Result = DAG.getNode(ISD::SHL, VT, Hi, ShiftAmount);
673 Result = DAG.getNode(ISD::OR, VT, Result, Lo);
675 SDOperand TF = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo.getValue(1),
678 SDOperand Ops[] = { Result, TF };
679 return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, MVT::Other), Ops, 2);
682 /// LegalizeOp - We know that the specified value has a legal type, and
683 /// that its operands are legal. Now ensure that the operation itself
684 /// is legal, recursively ensuring that the operands' operations remain
686 SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
687 if (Op.getOpcode() == ISD::TargetConstant) // Allow illegal target nodes.
690 assert(isTypeLegal(Op.getValueType()) &&
691 "Caller should expand or promote operands that are not legal!");
692 SDNode *Node = Op.Val;
694 // If this operation defines any values that cannot be represented in a
695 // register on this target, make sure to expand or promote them.
696 if (Node->getNumValues() > 1) {
697 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
698 if (getTypeAction(Node->getValueType(i)) != Legal) {
699 HandleOp(Op.getValue(i));
700 assert(LegalizedNodes.count(Op) &&
701 "Handling didn't add legal operands!");
702 return LegalizedNodes[Op];
706 // Note that LegalizeOp may be reentered even from single-use nodes, which
707 // means that we always must cache transformed nodes.
708 DenseMap<SDOperand, SDOperand>::iterator I = LegalizedNodes.find(Op);
709 if (I != LegalizedNodes.end()) return I->second;
711 SDOperand Tmp1, Tmp2, Tmp3, Tmp4;
712 SDOperand Result = Op;
713 bool isCustom = false;
715 switch (Node->getOpcode()) {
716 case ISD::FrameIndex:
717 case ISD::EntryToken:
719 case ISD::BasicBlock:
720 case ISD::TargetFrameIndex:
721 case ISD::TargetJumpTable:
722 case ISD::TargetConstant:
723 case ISD::TargetConstantFP:
724 case ISD::TargetConstantPool:
725 case ISD::TargetGlobalAddress:
726 case ISD::TargetGlobalTLSAddress:
727 case ISD::TargetExternalSymbol:
732 // Primitives must all be legal.
733 assert(TLI.isOperationLegal(Node->getValueType(0), Node->getValueType(0)) &&
734 "This must be legal!");
737 if (Node->getOpcode() >= ISD::BUILTIN_OP_END) {
738 // If this is a target node, legalize it by legalizing the operands then
739 // passing it through.
740 SmallVector<SDOperand, 8> Ops;
741 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i)
742 Ops.push_back(LegalizeOp(Node->getOperand(i)));
744 Result = DAG.UpdateNodeOperands(Result.getValue(0), &Ops[0], Ops.size());
746 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
747 AddLegalizedOperand(Op.getValue(i), Result.getValue(i));
748 return Result.getValue(Op.ResNo);
750 // Otherwise this is an unhandled builtin node. splat.
752 cerr << "NODE: "; Node->dump(&DAG); cerr << "\n";
754 assert(0 && "Do not know how to legalize this operator!");
756 case ISD::GLOBAL_OFFSET_TABLE:
757 case ISD::GlobalAddress:
758 case ISD::GlobalTLSAddress:
759 case ISD::ExternalSymbol:
760 case ISD::ConstantPool:
761 case ISD::JumpTable: // Nothing to do.
762 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
763 default: assert(0 && "This action is not supported yet!");
764 case TargetLowering::Custom:
765 Tmp1 = TLI.LowerOperation(Op, DAG);
766 if (Tmp1.Val) Result = Tmp1;
767 // FALLTHROUGH if the target doesn't want to lower this op after all.
768 case TargetLowering::Legal:
773 case ISD::RETURNADDR:
774 // The only option for these nodes is to custom lower them. If the target
775 // does not custom lower them, then return zero.
776 Tmp1 = TLI.LowerOperation(Op, DAG);
780 Result = DAG.getConstant(0, TLI.getPointerTy());
782 case ISD::FRAME_TO_ARGS_OFFSET: {
783 MVT::ValueType VT = Node->getValueType(0);
784 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
785 default: assert(0 && "This action is not supported yet!");
786 case TargetLowering::Custom:
787 Result = TLI.LowerOperation(Op, DAG);
788 if (Result.Val) break;
790 case TargetLowering::Legal:
791 Result = DAG.getConstant(0, VT);
796 case ISD::EXCEPTIONADDR: {
797 Tmp1 = LegalizeOp(Node->getOperand(0));
798 MVT::ValueType VT = Node->getValueType(0);
799 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
800 default: assert(0 && "This action is not supported yet!");
801 case TargetLowering::Expand: {
802 unsigned Reg = TLI.getExceptionAddressRegister();
803 Result = DAG.getCopyFromReg(Tmp1, Reg, VT).getValue(Op.ResNo);
806 case TargetLowering::Custom:
807 Result = TLI.LowerOperation(Op, DAG);
808 if (Result.Val) break;
810 case TargetLowering::Legal: {
811 SDOperand Ops[] = { DAG.getConstant(0, VT), Tmp1 };
812 Result = DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, MVT::Other),
813 Ops, 2).getValue(Op.ResNo);
819 case ISD::EHSELECTION: {
820 Tmp1 = LegalizeOp(Node->getOperand(0));
821 Tmp2 = LegalizeOp(Node->getOperand(1));
822 MVT::ValueType VT = Node->getValueType(0);
823 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
824 default: assert(0 && "This action is not supported yet!");
825 case TargetLowering::Expand: {
826 unsigned Reg = TLI.getExceptionSelectorRegister();
827 Result = DAG.getCopyFromReg(Tmp2, Reg, VT).getValue(Op.ResNo);
830 case TargetLowering::Custom:
831 Result = TLI.LowerOperation(Op, DAG);
832 if (Result.Val) break;
834 case TargetLowering::Legal: {
835 SDOperand Ops[] = { DAG.getConstant(0, VT), Tmp2 };
836 Result = DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, MVT::Other),
837 Ops, 2).getValue(Op.ResNo);
843 case ISD::EH_RETURN: {
844 MVT::ValueType VT = Node->getValueType(0);
845 // The only "good" option for this node is to custom lower it.
846 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
847 default: assert(0 && "This action is not supported at all!");
848 case TargetLowering::Custom:
849 Result = TLI.LowerOperation(Op, DAG);
850 if (Result.Val) break;
852 case TargetLowering::Legal:
853 // Target does not know, how to lower this, lower to noop
854 Result = LegalizeOp(Node->getOperand(0));
859 case ISD::AssertSext:
860 case ISD::AssertZext:
861 Tmp1 = LegalizeOp(Node->getOperand(0));
862 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
864 case ISD::MERGE_VALUES:
865 // Legalize eliminates MERGE_VALUES nodes.
866 Result = Node->getOperand(Op.ResNo);
868 case ISD::CopyFromReg:
869 Tmp1 = LegalizeOp(Node->getOperand(0));
870 Result = Op.getValue(0);
871 if (Node->getNumValues() == 2) {
872 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
874 assert(Node->getNumValues() == 3 && "Invalid copyfromreg!");
875 if (Node->getNumOperands() == 3) {
876 Tmp2 = LegalizeOp(Node->getOperand(2));
877 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1),Tmp2);
879 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
881 AddLegalizedOperand(Op.getValue(2), Result.getValue(2));
883 // Since CopyFromReg produces two values, make sure to remember that we
884 // legalized both of them.
885 AddLegalizedOperand(Op.getValue(0), Result);
886 AddLegalizedOperand(Op.getValue(1), Result.getValue(1));
887 return Result.getValue(Op.ResNo);
889 MVT::ValueType VT = Op.getValueType();
890 switch (TLI.getOperationAction(ISD::UNDEF, VT)) {
891 default: assert(0 && "This action is not supported yet!");
892 case TargetLowering::Expand:
893 if (MVT::isInteger(VT))
894 Result = DAG.getConstant(0, VT);
895 else if (MVT::isFloatingPoint(VT))
896 Result = DAG.getConstantFP(APFloat(APInt(MVT::getSizeInBits(VT), 0)),
899 assert(0 && "Unknown value type!");
901 case TargetLowering::Legal:
907 case ISD::INTRINSIC_W_CHAIN:
908 case ISD::INTRINSIC_WO_CHAIN:
909 case ISD::INTRINSIC_VOID: {
910 SmallVector<SDOperand, 8> Ops;
911 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i)
912 Ops.push_back(LegalizeOp(Node->getOperand(i)));
913 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
915 // Allow the target to custom lower its intrinsics if it wants to.
916 if (TLI.getOperationAction(Node->getOpcode(), MVT::Other) ==
917 TargetLowering::Custom) {
918 Tmp3 = TLI.LowerOperation(Result, DAG);
919 if (Tmp3.Val) Result = Tmp3;
922 if (Result.Val->getNumValues() == 1) break;
924 // Must have return value and chain result.
925 assert(Result.Val->getNumValues() == 2 &&
926 "Cannot return more than two values!");
928 // Since loads produce two values, make sure to remember that we
929 // legalized both of them.
930 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
931 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
932 return Result.getValue(Op.ResNo);
936 assert(Node->getNumOperands() == 5 && "Invalid LOCATION node!");
937 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the input chain.
939 switch (TLI.getOperationAction(ISD::LOCATION, MVT::Other)) {
940 case TargetLowering::Promote:
941 default: assert(0 && "This action is not supported yet!");
942 case TargetLowering::Expand: {
943 MachineModuleInfo *MMI = DAG.getMachineModuleInfo();
944 bool useDEBUG_LOC = TLI.isOperationLegal(ISD::DEBUG_LOC, MVT::Other);
945 bool useLABEL = TLI.isOperationLegal(ISD::LABEL, MVT::Other);
947 if (MMI && (useDEBUG_LOC || useLABEL)) {
948 const std::string &FName =
949 cast<StringSDNode>(Node->getOperand(3))->getValue();
950 const std::string &DirName =
951 cast<StringSDNode>(Node->getOperand(4))->getValue();
952 unsigned SrcFile = MMI->RecordSource(DirName, FName);
954 SmallVector<SDOperand, 8> Ops;
955 Ops.push_back(Tmp1); // chain
956 SDOperand LineOp = Node->getOperand(1);
957 SDOperand ColOp = Node->getOperand(2);
960 Ops.push_back(LineOp); // line #
961 Ops.push_back(ColOp); // col #
962 Ops.push_back(DAG.getConstant(SrcFile, MVT::i32)); // source file id
963 Result = DAG.getNode(ISD::DEBUG_LOC, MVT::Other, &Ops[0], Ops.size());
965 unsigned Line = cast<ConstantSDNode>(LineOp)->getValue();
966 unsigned Col = cast<ConstantSDNode>(ColOp)->getValue();
967 unsigned ID = MMI->RecordLabel(Line, Col, SrcFile);
968 Ops.push_back(DAG.getConstant(ID, MVT::i32));
969 Result = DAG.getNode(ISD::LABEL, MVT::Other,&Ops[0],Ops.size());
972 Result = Tmp1; // chain
976 case TargetLowering::Legal:
977 if (Tmp1 != Node->getOperand(0) ||
978 getTypeAction(Node->getOperand(1).getValueType()) == Promote) {
979 SmallVector<SDOperand, 8> Ops;
981 if (getTypeAction(Node->getOperand(1).getValueType()) == Legal) {
982 Ops.push_back(Node->getOperand(1)); // line # must be legal.
983 Ops.push_back(Node->getOperand(2)); // col # must be legal.
985 // Otherwise promote them.
986 Ops.push_back(PromoteOp(Node->getOperand(1)));
987 Ops.push_back(PromoteOp(Node->getOperand(2)));
989 Ops.push_back(Node->getOperand(3)); // filename must be legal.
990 Ops.push_back(Node->getOperand(4)); // working dir # must be legal.
991 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
998 assert(Node->getNumOperands() == 4 && "Invalid DEBUG_LOC node!");
999 switch (TLI.getOperationAction(ISD::DEBUG_LOC, MVT::Other)) {
1000 default: assert(0 && "This action is not supported yet!");
1001 case TargetLowering::Legal:
1002 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1003 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the line #.
1004 Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the col #.
1005 Tmp4 = LegalizeOp(Node->getOperand(3)); // Legalize the source file id.
1006 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3, Tmp4);
1012 assert(Node->getNumOperands() == 2 && "Invalid LABEL node!");
1013 switch (TLI.getOperationAction(ISD::LABEL, MVT::Other)) {
1014 default: assert(0 && "This action is not supported yet!");
1015 case TargetLowering::Legal:
1016 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1017 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the label id.
1018 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1020 case TargetLowering::Expand:
1021 Result = LegalizeOp(Node->getOperand(0));
1026 case ISD::Constant: {
1027 ConstantSDNode *CN = cast<ConstantSDNode>(Node);
1029 TLI.getOperationAction(ISD::Constant, CN->getValueType(0));
1031 // We know we don't need to expand constants here, constants only have one
1032 // value and we check that it is fine above.
1034 if (opAction == TargetLowering::Custom) {
1035 Tmp1 = TLI.LowerOperation(Result, DAG);
1041 case ISD::ConstantFP: {
1042 // Spill FP immediates to the constant pool if the target cannot directly
1043 // codegen them. Targets often have some immediate values that can be
1044 // efficiently generated into an FP register without a load. We explicitly
1045 // leave these constants as ConstantFP nodes for the target to deal with.
1046 ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Node);
1048 // Check to see if this FP immediate is already legal.
1049 bool isLegal = false;
1050 for (TargetLowering::legal_fpimm_iterator I = TLI.legal_fpimm_begin(),
1051 E = TLI.legal_fpimm_end(); I != E; ++I)
1052 if (CFP->isExactlyValue(*I)) {
1057 // If this is a legal constant, turn it into a TargetConstantFP node.
1059 Result = DAG.getTargetConstantFP(CFP->getValueAPF(),
1060 CFP->getValueType(0));
1064 switch (TLI.getOperationAction(ISD::ConstantFP, CFP->getValueType(0))) {
1065 default: assert(0 && "This action is not supported yet!");
1066 case TargetLowering::Custom:
1067 Tmp3 = TLI.LowerOperation(Result, DAG);
1073 case TargetLowering::Expand:
1074 Result = ExpandConstantFP(CFP, true, DAG, TLI);
1078 case ISD::TokenFactor:
1079 if (Node->getNumOperands() == 2) {
1080 Tmp1 = LegalizeOp(Node->getOperand(0));
1081 Tmp2 = LegalizeOp(Node->getOperand(1));
1082 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1083 } else if (Node->getNumOperands() == 3) {
1084 Tmp1 = LegalizeOp(Node->getOperand(0));
1085 Tmp2 = LegalizeOp(Node->getOperand(1));
1086 Tmp3 = LegalizeOp(Node->getOperand(2));
1087 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1089 SmallVector<SDOperand, 8> Ops;
1090 // Legalize the operands.
1091 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i)
1092 Ops.push_back(LegalizeOp(Node->getOperand(i)));
1093 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1097 case ISD::FORMAL_ARGUMENTS:
1099 // The only option for this is to custom lower it.
1100 Tmp3 = TLI.LowerOperation(Result.getValue(0), DAG);
1101 assert(Tmp3.Val && "Target didn't custom lower this node!");
1102 assert(Tmp3.Val->getNumValues() == Result.Val->getNumValues() &&
1103 "Lowering call/formal_arguments produced unexpected # results!");
1105 // Since CALL/FORMAL_ARGUMENTS nodes produce multiple values, make sure to
1106 // remember that we legalized all of them, so it doesn't get relegalized.
1107 for (unsigned i = 0, e = Tmp3.Val->getNumValues(); i != e; ++i) {
1108 Tmp1 = LegalizeOp(Tmp3.getValue(i));
1111 AddLegalizedOperand(SDOperand(Node, i), Tmp1);
1114 case ISD::EXTRACT_SUBREG: {
1115 Tmp1 = LegalizeOp(Node->getOperand(0));
1116 ConstantSDNode *idx = dyn_cast<ConstantSDNode>(Node->getOperand(1));
1117 assert(idx && "Operand must be a constant");
1118 Tmp2 = DAG.getTargetConstant(idx->getValue(), idx->getValueType(0));
1119 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1122 case ISD::INSERT_SUBREG: {
1123 Tmp1 = LegalizeOp(Node->getOperand(0));
1124 Tmp2 = LegalizeOp(Node->getOperand(1));
1125 ConstantSDNode *idx = dyn_cast<ConstantSDNode>(Node->getOperand(2));
1126 assert(idx && "Operand must be a constant");
1127 Tmp3 = DAG.getTargetConstant(idx->getValue(), idx->getValueType(0));
1128 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1131 case ISD::BUILD_VECTOR:
1132 switch (TLI.getOperationAction(ISD::BUILD_VECTOR, Node->getValueType(0))) {
1133 default: assert(0 && "This action is not supported yet!");
1134 case TargetLowering::Custom:
1135 Tmp3 = TLI.LowerOperation(Result, DAG);
1141 case TargetLowering::Expand:
1142 Result = ExpandBUILD_VECTOR(Result.Val);
1146 case ISD::INSERT_VECTOR_ELT:
1147 Tmp1 = LegalizeOp(Node->getOperand(0)); // InVec
1148 Tmp2 = LegalizeOp(Node->getOperand(1)); // InVal
1149 Tmp3 = LegalizeOp(Node->getOperand(2)); // InEltNo
1150 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1152 switch (TLI.getOperationAction(ISD::INSERT_VECTOR_ELT,
1153 Node->getValueType(0))) {
1154 default: assert(0 && "This action is not supported yet!");
1155 case TargetLowering::Legal:
1157 case TargetLowering::Custom:
1158 Tmp3 = TLI.LowerOperation(Result, DAG);
1164 case TargetLowering::Expand: {
1165 // If the insert index is a constant, codegen this as a scalar_to_vector,
1166 // then a shuffle that inserts it into the right position in the vector.
1167 if (ConstantSDNode *InsertPos = dyn_cast<ConstantSDNode>(Tmp3)) {
1168 SDOperand ScVec = DAG.getNode(ISD::SCALAR_TO_VECTOR,
1169 Tmp1.getValueType(), Tmp2);
1171 unsigned NumElts = MVT::getVectorNumElements(Tmp1.getValueType());
1172 MVT::ValueType ShufMaskVT = MVT::getIntVectorWithNumElements(NumElts);
1173 MVT::ValueType ShufMaskEltVT = MVT::getVectorElementType(ShufMaskVT);
1175 // We generate a shuffle of InVec and ScVec, so the shuffle mask should
1176 // be 0,1,2,3,4,5... with the appropriate element replaced with elt 0 of
1178 SmallVector<SDOperand, 8> ShufOps;
1179 for (unsigned i = 0; i != NumElts; ++i) {
1180 if (i != InsertPos->getValue())
1181 ShufOps.push_back(DAG.getConstant(i, ShufMaskEltVT));
1183 ShufOps.push_back(DAG.getConstant(NumElts, ShufMaskEltVT));
1185 SDOperand ShufMask = DAG.getNode(ISD::BUILD_VECTOR, ShufMaskVT,
1186 &ShufOps[0], ShufOps.size());
1188 Result = DAG.getNode(ISD::VECTOR_SHUFFLE, Tmp1.getValueType(),
1189 Tmp1, ScVec, ShufMask);
1190 Result = LegalizeOp(Result);
1194 // If the target doesn't support this, we have to spill the input vector
1195 // to a temporary stack slot, update the element, then reload it. This is
1196 // badness. We could also load the value into a vector register (either
1197 // with a "move to register" or "extload into register" instruction, then
1198 // permute it into place, if the idx is a constant and if the idx is
1199 // supported by the target.
1200 MVT::ValueType VT = Tmp1.getValueType();
1201 MVT::ValueType EltVT = Tmp2.getValueType();
1202 MVT::ValueType IdxVT = Tmp3.getValueType();
1203 MVT::ValueType PtrVT = TLI.getPointerTy();
1204 SDOperand StackPtr = CreateStackTemporary(VT);
1205 // Store the vector.
1206 SDOperand Ch = DAG.getStore(DAG.getEntryNode(), Tmp1, StackPtr, NULL, 0);
1208 // Truncate or zero extend offset to target pointer type.
1209 unsigned CastOpc = (IdxVT > PtrVT) ? ISD::TRUNCATE : ISD::ZERO_EXTEND;
1210 Tmp3 = DAG.getNode(CastOpc, PtrVT, Tmp3);
1211 // Add the offset to the index.
1212 unsigned EltSize = MVT::getSizeInBits(EltVT)/8;
1213 Tmp3 = DAG.getNode(ISD::MUL, IdxVT, Tmp3,DAG.getConstant(EltSize, IdxVT));
1214 SDOperand StackPtr2 = DAG.getNode(ISD::ADD, IdxVT, Tmp3, StackPtr);
1215 // Store the scalar value.
1216 Ch = DAG.getStore(Ch, Tmp2, StackPtr2, NULL, 0);
1217 // Load the updated vector.
1218 Result = DAG.getLoad(VT, Ch, StackPtr, NULL, 0);
1223 case ISD::SCALAR_TO_VECTOR:
1224 if (!TLI.isTypeLegal(Node->getOperand(0).getValueType())) {
1225 Result = LegalizeOp(ExpandSCALAR_TO_VECTOR(Node));
1229 Tmp1 = LegalizeOp(Node->getOperand(0)); // InVal
1230 Result = DAG.UpdateNodeOperands(Result, Tmp1);
1231 switch (TLI.getOperationAction(ISD::SCALAR_TO_VECTOR,
1232 Node->getValueType(0))) {
1233 default: assert(0 && "This action is not supported yet!");
1234 case TargetLowering::Legal:
1236 case TargetLowering::Custom:
1237 Tmp3 = TLI.LowerOperation(Result, DAG);
1243 case TargetLowering::Expand:
1244 Result = LegalizeOp(ExpandSCALAR_TO_VECTOR(Node));
1248 case ISD::VECTOR_SHUFFLE:
1249 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the input vectors,
1250 Tmp2 = LegalizeOp(Node->getOperand(1)); // but not the shuffle mask.
1251 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
1253 // Allow targets to custom lower the SHUFFLEs they support.
1254 switch (TLI.getOperationAction(ISD::VECTOR_SHUFFLE,Result.getValueType())) {
1255 default: assert(0 && "Unknown operation action!");
1256 case TargetLowering::Legal:
1257 assert(isShuffleLegal(Result.getValueType(), Node->getOperand(2)) &&
1258 "vector shuffle should not be created if not legal!");
1260 case TargetLowering::Custom:
1261 Tmp3 = TLI.LowerOperation(Result, DAG);
1267 case TargetLowering::Expand: {
1268 MVT::ValueType VT = Node->getValueType(0);
1269 MVT::ValueType EltVT = MVT::getVectorElementType(VT);
1270 MVT::ValueType PtrVT = TLI.getPointerTy();
1271 SDOperand Mask = Node->getOperand(2);
1272 unsigned NumElems = Mask.getNumOperands();
1273 SmallVector<SDOperand,8> Ops;
1274 for (unsigned i = 0; i != NumElems; ++i) {
1275 SDOperand Arg = Mask.getOperand(i);
1276 if (Arg.getOpcode() == ISD::UNDEF) {
1277 Ops.push_back(DAG.getNode(ISD::UNDEF, EltVT));
1279 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
1280 unsigned Idx = cast<ConstantSDNode>(Arg)->getValue();
1282 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, EltVT, Tmp1,
1283 DAG.getConstant(Idx, PtrVT)));
1285 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, EltVT, Tmp2,
1286 DAG.getConstant(Idx - NumElems, PtrVT)));
1289 Result = DAG.getNode(ISD::BUILD_VECTOR, VT, &Ops[0], Ops.size());
1292 case TargetLowering::Promote: {
1293 // Change base type to a different vector type.
1294 MVT::ValueType OVT = Node->getValueType(0);
1295 MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
1297 // Cast the two input vectors.
1298 Tmp1 = DAG.getNode(ISD::BIT_CONVERT, NVT, Tmp1);
1299 Tmp2 = DAG.getNode(ISD::BIT_CONVERT, NVT, Tmp2);
1301 // Convert the shuffle mask to the right # elements.
1302 Tmp3 = SDOperand(isShuffleLegal(OVT, Node->getOperand(2)), 0);
1303 assert(Tmp3.Val && "Shuffle not legal?");
1304 Result = DAG.getNode(ISD::VECTOR_SHUFFLE, NVT, Tmp1, Tmp2, Tmp3);
1305 Result = DAG.getNode(ISD::BIT_CONVERT, OVT, Result);
1311 case ISD::EXTRACT_VECTOR_ELT:
1312 Tmp1 = Node->getOperand(0);
1313 Tmp2 = LegalizeOp(Node->getOperand(1));
1314 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1315 Result = ExpandEXTRACT_VECTOR_ELT(Result);
1318 case ISD::EXTRACT_SUBVECTOR:
1319 Tmp1 = Node->getOperand(0);
1320 Tmp2 = LegalizeOp(Node->getOperand(1));
1321 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1322 Result = ExpandEXTRACT_SUBVECTOR(Result);
1325 case ISD::CALLSEQ_START: {
1326 SDNode *CallEnd = FindCallEndFromCallStart(Node);
1328 // Recursively Legalize all of the inputs of the call end that do not lead
1329 // to this call start. This ensures that any libcalls that need be inserted
1330 // are inserted *before* the CALLSEQ_START.
1331 {SmallPtrSet<SDNode*, 32> NodesLeadingTo;
1332 for (unsigned i = 0, e = CallEnd->getNumOperands(); i != e; ++i)
1333 LegalizeAllNodesNotLeadingTo(CallEnd->getOperand(i).Val, Node,
1337 // Now that we legalized all of the inputs (which may have inserted
1338 // libcalls) create the new CALLSEQ_START node.
1339 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1341 // Merge in the last call, to ensure that this call start after the last
1343 if (LastCALLSEQ_END.getOpcode() != ISD::EntryToken) {
1344 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1345 Tmp1 = LegalizeOp(Tmp1);
1348 // Do not try to legalize the target-specific arguments (#1+).
1349 if (Tmp1 != Node->getOperand(0)) {
1350 SmallVector<SDOperand, 8> Ops(Node->op_begin(), Node->op_end());
1352 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1355 // Remember that the CALLSEQ_START is legalized.
1356 AddLegalizedOperand(Op.getValue(0), Result);
1357 if (Node->getNumValues() == 2) // If this has a flag result, remember it.
1358 AddLegalizedOperand(Op.getValue(1), Result.getValue(1));
1360 // Now that the callseq_start and all of the non-call nodes above this call
1361 // sequence have been legalized, legalize the call itself. During this
1362 // process, no libcalls can/will be inserted, guaranteeing that no calls
1364 assert(!IsLegalizingCall && "Inconsistent sequentialization of calls!");
1365 SDOperand InCallSEQ = LastCALLSEQ_END;
1366 // Note that we are selecting this call!
1367 LastCALLSEQ_END = SDOperand(CallEnd, 0);
1368 IsLegalizingCall = true;
1370 // Legalize the call, starting from the CALLSEQ_END.
1371 LegalizeOp(LastCALLSEQ_END);
1372 assert(!IsLegalizingCall && "CALLSEQ_END should have cleared this!");
1375 case ISD::CALLSEQ_END:
1376 // If the CALLSEQ_START node hasn't been legalized first, legalize it. This
1377 // will cause this node to be legalized as well as handling libcalls right.
1378 if (LastCALLSEQ_END.Val != Node) {
1379 LegalizeOp(SDOperand(FindCallStartFromCallEnd(Node), 0));
1380 DenseMap<SDOperand, SDOperand>::iterator I = LegalizedNodes.find(Op);
1381 assert(I != LegalizedNodes.end() &&
1382 "Legalizing the call start should have legalized this node!");
1386 // Otherwise, the call start has been legalized and everything is going
1387 // according to plan. Just legalize ourselves normally here.
1388 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1389 // Do not try to legalize the target-specific arguments (#1+), except for
1390 // an optional flag input.
1391 if (Node->getOperand(Node->getNumOperands()-1).getValueType() != MVT::Flag){
1392 if (Tmp1 != Node->getOperand(0)) {
1393 SmallVector<SDOperand, 8> Ops(Node->op_begin(), Node->op_end());
1395 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1398 Tmp2 = LegalizeOp(Node->getOperand(Node->getNumOperands()-1));
1399 if (Tmp1 != Node->getOperand(0) ||
1400 Tmp2 != Node->getOperand(Node->getNumOperands()-1)) {
1401 SmallVector<SDOperand, 8> Ops(Node->op_begin(), Node->op_end());
1404 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1407 assert(IsLegalizingCall && "Call sequence imbalance between start/end?");
1408 // This finishes up call legalization.
1409 IsLegalizingCall = false;
1411 // If the CALLSEQ_END node has a flag, remember that we legalized it.
1412 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
1413 if (Node->getNumValues() == 2)
1414 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
1415 return Result.getValue(Op.ResNo);
1416 case ISD::DYNAMIC_STACKALLOC: {
1417 MVT::ValueType VT = Node->getValueType(0);
1418 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1419 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the size.
1420 Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the alignment.
1421 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1423 Tmp1 = Result.getValue(0);
1424 Tmp2 = Result.getValue(1);
1425 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
1426 default: assert(0 && "This action is not supported yet!");
1427 case TargetLowering::Expand: {
1428 unsigned SPReg = TLI.getStackPointerRegisterToSaveRestore();
1429 assert(SPReg && "Target cannot require DYNAMIC_STACKALLOC expansion and"
1430 " not tell us which reg is the stack pointer!");
1431 SDOperand Chain = Tmp1.getOperand(0);
1432 SDOperand Size = Tmp2.getOperand(1);
1433 SDOperand SP = DAG.getCopyFromReg(Chain, SPReg, VT);
1434 Chain = SP.getValue(1);
1435 unsigned Align = cast<ConstantSDNode>(Tmp3)->getValue();
1436 unsigned StackAlign =
1437 TLI.getTargetMachine().getFrameInfo()->getStackAlignment();
1438 if (Align > StackAlign)
1439 SP = DAG.getNode(ISD::AND, VT, SP,
1440 DAG.getConstant(-(uint64_t)Align, VT));
1441 Tmp1 = DAG.getNode(ISD::SUB, VT, SP, Size); // Value
1442 Tmp2 = DAG.getCopyToReg(Chain, SPReg, Tmp1); // Output chain
1443 Tmp1 = LegalizeOp(Tmp1);
1444 Tmp2 = LegalizeOp(Tmp2);
1447 case TargetLowering::Custom:
1448 Tmp3 = TLI.LowerOperation(Tmp1, DAG);
1450 Tmp1 = LegalizeOp(Tmp3);
1451 Tmp2 = LegalizeOp(Tmp3.getValue(1));
1454 case TargetLowering::Legal:
1457 // Since this op produce two values, make sure to remember that we
1458 // legalized both of them.
1459 AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
1460 AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
1461 return Op.ResNo ? Tmp2 : Tmp1;
1463 case ISD::INLINEASM: {
1464 SmallVector<SDOperand, 8> Ops(Node->op_begin(), Node->op_end());
1465 bool Changed = false;
1466 // Legalize all of the operands of the inline asm, in case they are nodes
1467 // that need to be expanded or something. Note we skip the asm string and
1468 // all of the TargetConstant flags.
1469 SDOperand Op = LegalizeOp(Ops[0]);
1470 Changed = Op != Ops[0];
1473 bool HasInFlag = Ops.back().getValueType() == MVT::Flag;
1474 for (unsigned i = 2, e = Ops.size()-HasInFlag; i < e; ) {
1475 unsigned NumVals = cast<ConstantSDNode>(Ops[i])->getValue() >> 3;
1476 for (++i; NumVals; ++i, --NumVals) {
1477 SDOperand Op = LegalizeOp(Ops[i]);
1486 Op = LegalizeOp(Ops.back());
1487 Changed |= Op != Ops.back();
1492 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
1494 // INLINE asm returns a chain and flag, make sure to add both to the map.
1495 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
1496 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
1497 return Result.getValue(Op.ResNo);
1500 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1501 // Ensure that libcalls are emitted before a branch.
1502 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1503 Tmp1 = LegalizeOp(Tmp1);
1504 LastCALLSEQ_END = DAG.getEntryNode();
1506 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
1509 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1510 // Ensure that libcalls are emitted before a branch.
1511 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1512 Tmp1 = LegalizeOp(Tmp1);
1513 LastCALLSEQ_END = DAG.getEntryNode();
1515 switch (getTypeAction(Node->getOperand(1).getValueType())) {
1516 default: assert(0 && "Indirect target must be legal type (pointer)!");
1518 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the condition.
1521 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
1524 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1525 // Ensure that libcalls are emitted before a branch.
1526 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1527 Tmp1 = LegalizeOp(Tmp1);
1528 LastCALLSEQ_END = DAG.getEntryNode();
1530 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the jumptable node.
1531 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
1533 switch (TLI.getOperationAction(ISD::BR_JT, MVT::Other)) {
1534 default: assert(0 && "This action is not supported yet!");
1535 case TargetLowering::Legal: break;
1536 case TargetLowering::Custom:
1537 Tmp1 = TLI.LowerOperation(Result, DAG);
1538 if (Tmp1.Val) Result = Tmp1;
1540 case TargetLowering::Expand: {
1541 SDOperand Chain = Result.getOperand(0);
1542 SDOperand Table = Result.getOperand(1);
1543 SDOperand Index = Result.getOperand(2);
1545 MVT::ValueType PTy = TLI.getPointerTy();
1546 MachineFunction &MF = DAG.getMachineFunction();
1547 unsigned EntrySize = MF.getJumpTableInfo()->getEntrySize();
1548 Index= DAG.getNode(ISD::MUL, PTy, Index, DAG.getConstant(EntrySize, PTy));
1549 SDOperand Addr = DAG.getNode(ISD::ADD, PTy, Index, Table);
1552 switch (EntrySize) {
1553 default: assert(0 && "Size of jump table not supported yet."); break;
1554 case 4: LD = DAG.getLoad(MVT::i32, Chain, Addr, NULL, 0); break;
1555 case 8: LD = DAG.getLoad(MVT::i64, Chain, Addr, NULL, 0); break;
1558 if (TLI.getTargetMachine().getRelocationModel() == Reloc::PIC_) {
1559 // For PIC, the sequence is:
1560 // BRIND(load(Jumptable + index) + RelocBase)
1561 // RelocBase is the JumpTable on PPC and X86, GOT on Alpha
1563 if (TLI.usesGlobalOffsetTable())
1564 Reloc = DAG.getNode(ISD::GLOBAL_OFFSET_TABLE, PTy);
1567 Addr = (PTy != MVT::i32) ? DAG.getNode(ISD::SIGN_EXTEND, PTy, LD) : LD;
1568 Addr = DAG.getNode(ISD::ADD, PTy, Addr, Reloc);
1569 Result = DAG.getNode(ISD::BRIND, MVT::Other, LD.getValue(1), Addr);
1571 Result = DAG.getNode(ISD::BRIND, MVT::Other, LD.getValue(1), LD);
1577 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1578 // Ensure that libcalls are emitted before a return.
1579 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1580 Tmp1 = LegalizeOp(Tmp1);
1581 LastCALLSEQ_END = DAG.getEntryNode();
1583 switch (getTypeAction(Node->getOperand(1).getValueType())) {
1584 case Expand: assert(0 && "It's impossible to expand bools");
1586 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the condition.
1589 Tmp2 = PromoteOp(Node->getOperand(1)); // Promote the condition.
1591 // The top bits of the promoted condition are not necessarily zero, ensure
1592 // that the value is properly zero extended.
1593 if (!DAG.MaskedValueIsZero(Tmp2,
1594 MVT::getIntVTBitMask(Tmp2.getValueType())^1))
1595 Tmp2 = DAG.getZeroExtendInReg(Tmp2, MVT::i1);
1599 // Basic block destination (Op#2) is always legal.
1600 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
1602 switch (TLI.getOperationAction(ISD::BRCOND, MVT::Other)) {
1603 default: assert(0 && "This action is not supported yet!");
1604 case TargetLowering::Legal: break;
1605 case TargetLowering::Custom:
1606 Tmp1 = TLI.LowerOperation(Result, DAG);
1607 if (Tmp1.Val) Result = Tmp1;
1609 case TargetLowering::Expand:
1610 // Expand brcond's setcc into its constituent parts and create a BR_CC
1612 if (Tmp2.getOpcode() == ISD::SETCC) {
1613 Result = DAG.getNode(ISD::BR_CC, MVT::Other, Tmp1, Tmp2.getOperand(2),
1614 Tmp2.getOperand(0), Tmp2.getOperand(1),
1615 Node->getOperand(2));
1617 Result = DAG.getNode(ISD::BR_CC, MVT::Other, Tmp1,
1618 DAG.getCondCode(ISD::SETNE), Tmp2,
1619 DAG.getConstant(0, Tmp2.getValueType()),
1620 Node->getOperand(2));
1626 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1627 // Ensure that libcalls are emitted before a branch.
1628 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1629 Tmp1 = LegalizeOp(Tmp1);
1630 Tmp2 = Node->getOperand(2); // LHS
1631 Tmp3 = Node->getOperand(3); // RHS
1632 Tmp4 = Node->getOperand(1); // CC
1634 LegalizeSetCCOperands(Tmp2, Tmp3, Tmp4);
1635 LastCALLSEQ_END = DAG.getEntryNode();
1637 // If we didn't get both a LHS and RHS back from LegalizeSetCCOperands,
1638 // the LHS is a legal SETCC itself. In this case, we need to compare
1639 // the result against zero to select between true and false values.
1640 if (Tmp3.Val == 0) {
1641 Tmp3 = DAG.getConstant(0, Tmp2.getValueType());
1642 Tmp4 = DAG.getCondCode(ISD::SETNE);
1645 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp4, Tmp2, Tmp3,
1646 Node->getOperand(4));
1648 switch (TLI.getOperationAction(ISD::BR_CC, Tmp3.getValueType())) {
1649 default: assert(0 && "Unexpected action for BR_CC!");
1650 case TargetLowering::Legal: break;
1651 case TargetLowering::Custom:
1652 Tmp4 = TLI.LowerOperation(Result, DAG);
1653 if (Tmp4.Val) Result = Tmp4;
1658 LoadSDNode *LD = cast<LoadSDNode>(Node);
1659 Tmp1 = LegalizeOp(LD->getChain()); // Legalize the chain.
1660 Tmp2 = LegalizeOp(LD->getBasePtr()); // Legalize the base pointer.
1662 ISD::LoadExtType ExtType = LD->getExtensionType();
1663 if (ExtType == ISD::NON_EXTLOAD) {
1664 MVT::ValueType VT = Node->getValueType(0);
1665 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, LD->getOffset());
1666 Tmp3 = Result.getValue(0);
1667 Tmp4 = Result.getValue(1);
1669 switch (TLI.getOperationAction(Node->getOpcode(), VT)) {
1670 default: assert(0 && "This action is not supported yet!");
1671 case TargetLowering::Legal:
1672 // If this is an unaligned load and the target doesn't support it,
1674 if (!TLI.allowsUnalignedMemoryAccesses()) {
1675 unsigned ABIAlignment = TLI.getTargetData()->
1676 getABITypeAlignment(MVT::getTypeForValueType(LD->getLoadedVT()));
1677 if (LD->getAlignment() < ABIAlignment){
1678 Result = ExpandUnalignedLoad(cast<LoadSDNode>(Result.Val), DAG,
1680 Tmp3 = Result.getOperand(0);
1681 Tmp4 = Result.getOperand(1);
1682 Tmp3 = LegalizeOp(Tmp3);
1683 Tmp4 = LegalizeOp(Tmp4);
1687 case TargetLowering::Custom:
1688 Tmp1 = TLI.LowerOperation(Tmp3, DAG);
1690 Tmp3 = LegalizeOp(Tmp1);
1691 Tmp4 = LegalizeOp(Tmp1.getValue(1));
1694 case TargetLowering::Promote: {
1695 // Only promote a load of vector type to another.
1696 assert(MVT::isVector(VT) && "Cannot promote this load!");
1697 // Change base type to a different vector type.
1698 MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), VT);
1700 Tmp1 = DAG.getLoad(NVT, Tmp1, Tmp2, LD->getSrcValue(),
1701 LD->getSrcValueOffset(),
1702 LD->isVolatile(), LD->getAlignment());
1703 Tmp3 = LegalizeOp(DAG.getNode(ISD::BIT_CONVERT, VT, Tmp1));
1704 Tmp4 = LegalizeOp(Tmp1.getValue(1));
1708 // Since loads produce two values, make sure to remember that we
1709 // legalized both of them.
1710 AddLegalizedOperand(SDOperand(Node, 0), Tmp3);
1711 AddLegalizedOperand(SDOperand(Node, 1), Tmp4);
1712 return Op.ResNo ? Tmp4 : Tmp3;
1714 MVT::ValueType SrcVT = LD->getLoadedVT();
1715 switch (TLI.getLoadXAction(ExtType, SrcVT)) {
1716 default: assert(0 && "This action is not supported yet!");
1717 case TargetLowering::Promote:
1718 assert(SrcVT == MVT::i1 &&
1719 "Can only promote extending LOAD from i1 -> i8!");
1720 Result = DAG.getExtLoad(ExtType, Node->getValueType(0), Tmp1, Tmp2,
1721 LD->getSrcValue(), LD->getSrcValueOffset(),
1722 MVT::i8, LD->isVolatile(), LD->getAlignment());
1723 Tmp1 = Result.getValue(0);
1724 Tmp2 = Result.getValue(1);
1726 case TargetLowering::Custom:
1729 case TargetLowering::Legal:
1730 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, LD->getOffset());
1731 Tmp1 = Result.getValue(0);
1732 Tmp2 = Result.getValue(1);
1735 Tmp3 = TLI.LowerOperation(Result, DAG);
1737 Tmp1 = LegalizeOp(Tmp3);
1738 Tmp2 = LegalizeOp(Tmp3.getValue(1));
1741 // If this is an unaligned load and the target doesn't support it,
1743 if (!TLI.allowsUnalignedMemoryAccesses()) {
1744 unsigned ABIAlignment = TLI.getTargetData()->
1745 getABITypeAlignment(MVT::getTypeForValueType(LD->getLoadedVT()));
1746 if (LD->getAlignment() < ABIAlignment){
1747 Result = ExpandUnalignedLoad(cast<LoadSDNode>(Result.Val), DAG,
1749 Tmp1 = Result.getOperand(0);
1750 Tmp2 = Result.getOperand(1);
1751 Tmp1 = LegalizeOp(Tmp1);
1752 Tmp2 = LegalizeOp(Tmp2);
1757 case TargetLowering::Expand:
1758 // f64 = EXTLOAD f32 should expand to LOAD, FP_EXTEND
1759 if (SrcVT == MVT::f32 && Node->getValueType(0) == MVT::f64) {
1760 SDOperand Load = DAG.getLoad(SrcVT, Tmp1, Tmp2, LD->getSrcValue(),
1761 LD->getSrcValueOffset(),
1762 LD->isVolatile(), LD->getAlignment());
1763 Result = DAG.getNode(ISD::FP_EXTEND, Node->getValueType(0), Load);
1764 Tmp1 = LegalizeOp(Result); // Relegalize new nodes.
1765 Tmp2 = LegalizeOp(Load.getValue(1));
1768 assert(ExtType != ISD::EXTLOAD &&"EXTLOAD should always be supported!");
1769 // Turn the unsupported load into an EXTLOAD followed by an explicit
1770 // zero/sign extend inreg.
1771 Result = DAG.getExtLoad(ISD::EXTLOAD, Node->getValueType(0),
1772 Tmp1, Tmp2, LD->getSrcValue(),
1773 LD->getSrcValueOffset(), SrcVT,
1774 LD->isVolatile(), LD->getAlignment());
1776 if (ExtType == ISD::SEXTLOAD)
1777 ValRes = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
1778 Result, DAG.getValueType(SrcVT));
1780 ValRes = DAG.getZeroExtendInReg(Result, SrcVT);
1781 Tmp1 = LegalizeOp(ValRes); // Relegalize new nodes.
1782 Tmp2 = LegalizeOp(Result.getValue(1)); // Relegalize new nodes.
1785 // Since loads produce two values, make sure to remember that we legalized
1787 AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
1788 AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
1789 return Op.ResNo ? Tmp2 : Tmp1;
1792 case ISD::EXTRACT_ELEMENT: {
1793 MVT::ValueType OpTy = Node->getOperand(0).getValueType();
1794 switch (getTypeAction(OpTy)) {
1795 default: assert(0 && "EXTRACT_ELEMENT action for type unimplemented!");
1797 if (cast<ConstantSDNode>(Node->getOperand(1))->getValue()) {
1799 Result = DAG.getNode(ISD::SRL, OpTy, Node->getOperand(0),
1800 DAG.getConstant(MVT::getSizeInBits(OpTy)/2,
1801 TLI.getShiftAmountTy()));
1802 Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), Result);
1805 Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0),
1806 Node->getOperand(0));
1810 // Get both the low and high parts.
1811 ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
1812 if (cast<ConstantSDNode>(Node->getOperand(1))->getValue())
1813 Result = Tmp2; // 1 -> Hi
1815 Result = Tmp1; // 0 -> Lo
1821 case ISD::CopyToReg:
1822 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1824 assert(isTypeLegal(Node->getOperand(2).getValueType()) &&
1825 "Register type must be legal!");
1826 // Legalize the incoming value (must be a legal type).
1827 Tmp2 = LegalizeOp(Node->getOperand(2));
1828 if (Node->getNumValues() == 1) {
1829 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1), Tmp2);
1831 assert(Node->getNumValues() == 2 && "Unknown CopyToReg");
1832 if (Node->getNumOperands() == 4) {
1833 Tmp3 = LegalizeOp(Node->getOperand(3));
1834 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1), Tmp2,
1837 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1),Tmp2);
1840 // Since this produces two values, make sure to remember that we legalized
1842 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
1843 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
1849 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
1851 // Ensure that libcalls are emitted before a return.
1852 Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
1853 Tmp1 = LegalizeOp(Tmp1);
1854 LastCALLSEQ_END = DAG.getEntryNode();
1856 switch (Node->getNumOperands()) {
1858 Tmp2 = Node->getOperand(1);
1859 Tmp3 = Node->getOperand(2); // Signness
1860 switch (getTypeAction(Tmp2.getValueType())) {
1862 Result = DAG.UpdateNodeOperands(Result, Tmp1, LegalizeOp(Tmp2), Tmp3);
1865 if (!MVT::isVector(Tmp2.getValueType())) {
1867 ExpandOp(Tmp2, Lo, Hi);
1869 // Big endian systems want the hi reg first.
1870 if (!TLI.isLittleEndian())
1874 Result = DAG.getNode(ISD::RET, MVT::Other, Tmp1, Lo, Tmp3, Hi,Tmp3);
1876 Result = DAG.getNode(ISD::RET, MVT::Other, Tmp1, Lo, Tmp3);
1877 Result = LegalizeOp(Result);
1879 SDNode *InVal = Tmp2.Val;
1880 unsigned NumElems = MVT::getVectorNumElements(InVal->getValueType(0));
1881 MVT::ValueType EVT = MVT::getVectorElementType(InVal->getValueType(0));
1883 // Figure out if there is a simple type corresponding to this Vector
1884 // type. If so, convert to the vector type.
1885 MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
1886 if (TLI.isTypeLegal(TVT)) {
1887 // Turn this into a return of the vector type.
1888 Tmp2 = LegalizeOp(Tmp2);
1889 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1890 } else if (NumElems == 1) {
1891 // Turn this into a return of the scalar type.
1892 Tmp2 = ScalarizeVectorOp(Tmp2);
1893 Tmp2 = LegalizeOp(Tmp2);
1894 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1896 // FIXME: Returns of gcc generic vectors smaller than a legal type
1897 // should be returned in integer registers!
1899 // The scalarized value type may not be legal, e.g. it might require
1900 // promotion or expansion. Relegalize the return.
1901 Result = LegalizeOp(Result);
1903 // FIXME: Returns of gcc generic vectors larger than a legal vector
1904 // type should be returned by reference!
1906 SplitVectorOp(Tmp2, Lo, Hi);
1907 Result = DAG.getNode(ISD::RET, MVT::Other, Tmp1, Lo, Tmp3, Hi,Tmp3);
1908 Result = LegalizeOp(Result);
1913 Tmp2 = PromoteOp(Node->getOperand(1));
1914 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
1915 Result = LegalizeOp(Result);
1920 Result = DAG.UpdateNodeOperands(Result, Tmp1);
1922 default: { // ret <values>
1923 SmallVector<SDOperand, 8> NewValues;
1924 NewValues.push_back(Tmp1);
1925 for (unsigned i = 1, e = Node->getNumOperands(); i < e; i += 2)
1926 switch (getTypeAction(Node->getOperand(i).getValueType())) {
1928 NewValues.push_back(LegalizeOp(Node->getOperand(i)));
1929 NewValues.push_back(Node->getOperand(i+1));
1933 assert(!MVT::isExtendedVT(Node->getOperand(i).getValueType()) &&
1934 "FIXME: TODO: implement returning non-legal vector types!");
1935 ExpandOp(Node->getOperand(i), Lo, Hi);
1936 NewValues.push_back(Lo);
1937 NewValues.push_back(Node->getOperand(i+1));
1939 NewValues.push_back(Hi);
1940 NewValues.push_back(Node->getOperand(i+1));
1945 assert(0 && "Can't promote multiple return value yet!");
1948 if (NewValues.size() == Node->getNumOperands())
1949 Result = DAG.UpdateNodeOperands(Result, &NewValues[0],NewValues.size());
1951 Result = DAG.getNode(ISD::RET, MVT::Other,
1952 &NewValues[0], NewValues.size());
1957 if (Result.getOpcode() == ISD::RET) {
1958 switch (TLI.getOperationAction(Result.getOpcode(), MVT::Other)) {
1959 default: assert(0 && "This action is not supported yet!");
1960 case TargetLowering::Legal: break;
1961 case TargetLowering::Custom:
1962 Tmp1 = TLI.LowerOperation(Result, DAG);
1963 if (Tmp1.Val) Result = Tmp1;
1969 StoreSDNode *ST = cast<StoreSDNode>(Node);
1970 Tmp1 = LegalizeOp(ST->getChain()); // Legalize the chain.
1971 Tmp2 = LegalizeOp(ST->getBasePtr()); // Legalize the pointer.
1972 int SVOffset = ST->getSrcValueOffset();
1973 unsigned Alignment = ST->getAlignment();
1974 bool isVolatile = ST->isVolatile();
1976 if (!ST->isTruncatingStore()) {
1977 // Turn 'store float 1.0, Ptr' -> 'store int 0x12345678, Ptr'
1978 // FIXME: We shouldn't do this for TargetConstantFP's.
1979 // FIXME: move this to the DAG Combiner! Note that we can't regress due
1980 // to phase ordering between legalized code and the dag combiner. This
1981 // probably means that we need to integrate dag combiner and legalizer
1983 // We generally can't do this one for long doubles.
1984 if (ConstantFPSDNode *CFP =dyn_cast<ConstantFPSDNode>(ST->getValue())) {
1985 if (CFP->getValueType(0) == MVT::f32) {
1986 Tmp3 = DAG.getConstant((uint32_t)CFP->getValueAPF().
1987 convertToAPInt().getZExtValue(),
1989 Result = DAG.getStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
1990 SVOffset, isVolatile, Alignment);
1992 } else if (CFP->getValueType(0) == MVT::f64) {
1993 Tmp3 = DAG.getConstant(CFP->getValueAPF().convertToAPInt().
1994 getZExtValue(), MVT::i64);
1995 Result = DAG.getStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
1996 SVOffset, isVolatile, Alignment);
2001 switch (getTypeAction(ST->getStoredVT())) {
2003 Tmp3 = LegalizeOp(ST->getValue());
2004 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp3, Tmp2,
2007 MVT::ValueType VT = Tmp3.getValueType();
2008 switch (TLI.getOperationAction(ISD::STORE, VT)) {
2009 default: assert(0 && "This action is not supported yet!");
2010 case TargetLowering::Legal:
2011 // If this is an unaligned store and the target doesn't support it,
2013 if (!TLI.allowsUnalignedMemoryAccesses()) {
2014 unsigned ABIAlignment = TLI.getTargetData()->
2015 getABITypeAlignment(MVT::getTypeForValueType(ST->getStoredVT()));
2016 if (ST->getAlignment() < ABIAlignment)
2017 Result = ExpandUnalignedStore(cast<StoreSDNode>(Result.Val), DAG,
2021 case TargetLowering::Custom:
2022 Tmp1 = TLI.LowerOperation(Result, DAG);
2023 if (Tmp1.Val) Result = Tmp1;
2025 case TargetLowering::Promote:
2026 assert(MVT::isVector(VT) && "Unknown legal promote case!");
2027 Tmp3 = DAG.getNode(ISD::BIT_CONVERT,
2028 TLI.getTypeToPromoteTo(ISD::STORE, VT), Tmp3);
2029 Result = DAG.getStore(Tmp1, Tmp3, Tmp2,
2030 ST->getSrcValue(), SVOffset, isVolatile,
2037 // Truncate the value and store the result.
2038 Tmp3 = PromoteOp(ST->getValue());
2039 Result = DAG.getTruncStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
2040 SVOffset, ST->getStoredVT(),
2041 isVolatile, Alignment);
2045 unsigned IncrementSize = 0;
2048 // If this is a vector type, then we have to calculate the increment as
2049 // the product of the element size in bytes, and the number of elements
2050 // in the high half of the vector.
2051 if (MVT::isVector(ST->getValue().getValueType())) {
2052 SDNode *InVal = ST->getValue().Val;
2053 unsigned NumElems = MVT::getVectorNumElements(InVal->getValueType(0));
2054 MVT::ValueType EVT = MVT::getVectorElementType(InVal->getValueType(0));
2056 // Figure out if there is a simple type corresponding to this Vector
2057 // type. If so, convert to the vector type.
2058 MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
2059 if (TLI.isTypeLegal(TVT)) {
2060 // Turn this into a normal store of the vector type.
2061 Tmp3 = LegalizeOp(Node->getOperand(1));
2062 Result = DAG.getStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
2063 SVOffset, isVolatile, Alignment);
2064 Result = LegalizeOp(Result);
2066 } else if (NumElems == 1) {
2067 // Turn this into a normal store of the scalar type.
2068 Tmp3 = ScalarizeVectorOp(Node->getOperand(1));
2069 Result = DAG.getStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
2070 SVOffset, isVolatile, Alignment);
2071 // The scalarized value type may not be legal, e.g. it might require
2072 // promotion or expansion. Relegalize the scalar store.
2073 Result = LegalizeOp(Result);
2076 SplitVectorOp(Node->getOperand(1), Lo, Hi);
2077 IncrementSize = NumElems/2 * MVT::getSizeInBits(EVT)/8;
2080 ExpandOp(Node->getOperand(1), Lo, Hi);
2081 IncrementSize = Hi.Val ? MVT::getSizeInBits(Hi.getValueType())/8 : 0;
2083 if (!TLI.isLittleEndian())
2087 Lo = DAG.getStore(Tmp1, Lo, Tmp2, ST->getSrcValue(),
2088 SVOffset, isVolatile, Alignment);
2090 if (Hi.Val == NULL) {
2091 // Must be int <-> float one-to-one expansion.
2096 Tmp2 = DAG.getNode(ISD::ADD, Tmp2.getValueType(), Tmp2,
2097 getIntPtrConstant(IncrementSize));
2098 assert(isTypeLegal(Tmp2.getValueType()) &&
2099 "Pointers must be legal!");
2100 SVOffset += IncrementSize;
2101 if (Alignment > IncrementSize)
2102 Alignment = IncrementSize;
2103 Hi = DAG.getStore(Tmp1, Hi, Tmp2, ST->getSrcValue(),
2104 SVOffset, isVolatile, Alignment);
2105 Result = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo, Hi);
2110 assert(isTypeLegal(ST->getValue().getValueType()) &&
2111 "Cannot handle illegal TRUNCSTORE yet!");
2112 Tmp3 = LegalizeOp(ST->getValue());
2114 // The only promote case we handle is TRUNCSTORE:i1 X into
2115 // -> TRUNCSTORE:i8 (and X, 1)
2116 if (ST->getStoredVT() == MVT::i1 &&
2117 TLI.getStoreXAction(MVT::i1) == TargetLowering::Promote) {
2118 // Promote the bool to a mask then store.
2119 Tmp3 = DAG.getNode(ISD::AND, Tmp3.getValueType(), Tmp3,
2120 DAG.getConstant(1, Tmp3.getValueType()));
2121 Result = DAG.getTruncStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
2123 isVolatile, Alignment);
2124 } else if (Tmp1 != ST->getChain() || Tmp3 != ST->getValue() ||
2125 Tmp2 != ST->getBasePtr()) {
2126 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp3, Tmp2,
2130 MVT::ValueType StVT = cast<StoreSDNode>(Result.Val)->getStoredVT();
2131 switch (TLI.getStoreXAction(StVT)) {
2132 default: assert(0 && "This action is not supported yet!");
2133 case TargetLowering::Legal:
2134 // If this is an unaligned store and the target doesn't support it,
2136 if (!TLI.allowsUnalignedMemoryAccesses()) {
2137 unsigned ABIAlignment = TLI.getTargetData()->
2138 getABITypeAlignment(MVT::getTypeForValueType(ST->getStoredVT()));
2139 if (ST->getAlignment() < ABIAlignment)
2140 Result = ExpandUnalignedStore(cast<StoreSDNode>(Result.Val), DAG,
2144 case TargetLowering::Custom:
2145 Tmp1 = TLI.LowerOperation(Result, DAG);
2146 if (Tmp1.Val) Result = Tmp1;
2153 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2154 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
2156 case ISD::STACKSAVE:
2157 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2158 Result = DAG.UpdateNodeOperands(Result, Tmp1);
2159 Tmp1 = Result.getValue(0);
2160 Tmp2 = Result.getValue(1);
2162 switch (TLI.getOperationAction(ISD::STACKSAVE, MVT::Other)) {
2163 default: assert(0 && "This action is not supported yet!");
2164 case TargetLowering::Legal: break;
2165 case TargetLowering::Custom:
2166 Tmp3 = TLI.LowerOperation(Result, DAG);
2168 Tmp1 = LegalizeOp(Tmp3);
2169 Tmp2 = LegalizeOp(Tmp3.getValue(1));
2172 case TargetLowering::Expand:
2173 // Expand to CopyFromReg if the target set
2174 // StackPointerRegisterToSaveRestore.
2175 if (unsigned SP = TLI.getStackPointerRegisterToSaveRestore()) {
2176 Tmp1 = DAG.getCopyFromReg(Result.getOperand(0), SP,
2177 Node->getValueType(0));
2178 Tmp2 = Tmp1.getValue(1);
2180 Tmp1 = DAG.getNode(ISD::UNDEF, Node->getValueType(0));
2181 Tmp2 = Node->getOperand(0);
2186 // Since stacksave produce two values, make sure to remember that we
2187 // legalized both of them.
2188 AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
2189 AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
2190 return Op.ResNo ? Tmp2 : Tmp1;
2192 case ISD::STACKRESTORE:
2193 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2194 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
2195 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2197 switch (TLI.getOperationAction(ISD::STACKRESTORE, MVT::Other)) {
2198 default: assert(0 && "This action is not supported yet!");
2199 case TargetLowering::Legal: break;
2200 case TargetLowering::Custom:
2201 Tmp1 = TLI.LowerOperation(Result, DAG);
2202 if (Tmp1.Val) Result = Tmp1;
2204 case TargetLowering::Expand:
2205 // Expand to CopyToReg if the target set
2206 // StackPointerRegisterToSaveRestore.
2207 if (unsigned SP = TLI.getStackPointerRegisterToSaveRestore()) {
2208 Result = DAG.getCopyToReg(Tmp1, SP, Tmp2);
2216 case ISD::READCYCLECOUNTER:
2217 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain
2218 Result = DAG.UpdateNodeOperands(Result, Tmp1);
2219 switch (TLI.getOperationAction(ISD::READCYCLECOUNTER,
2220 Node->getValueType(0))) {
2221 default: assert(0 && "This action is not supported yet!");
2222 case TargetLowering::Legal:
2223 Tmp1 = Result.getValue(0);
2224 Tmp2 = Result.getValue(1);
2226 case TargetLowering::Custom:
2227 Result = TLI.LowerOperation(Result, DAG);
2228 Tmp1 = LegalizeOp(Result.getValue(0));
2229 Tmp2 = LegalizeOp(Result.getValue(1));
2233 // Since rdcc produce two values, make sure to remember that we legalized
2235 AddLegalizedOperand(SDOperand(Node, 0), Tmp1);
2236 AddLegalizedOperand(SDOperand(Node, 1), Tmp2);
2240 switch (getTypeAction(Node->getOperand(0).getValueType())) {
2241 case Expand: assert(0 && "It's impossible to expand bools");
2243 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the condition.
2246 Tmp1 = PromoteOp(Node->getOperand(0)); // Promote the condition.
2247 // Make sure the condition is either zero or one.
2248 if (!DAG.MaskedValueIsZero(Tmp1,
2249 MVT::getIntVTBitMask(Tmp1.getValueType())^1))
2250 Tmp1 = DAG.getZeroExtendInReg(Tmp1, MVT::i1);
2253 Tmp2 = LegalizeOp(Node->getOperand(1)); // TrueVal
2254 Tmp3 = LegalizeOp(Node->getOperand(2)); // FalseVal
2256 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
2258 switch (TLI.getOperationAction(ISD::SELECT, Tmp2.getValueType())) {
2259 default: assert(0 && "This action is not supported yet!");
2260 case TargetLowering::Legal: break;
2261 case TargetLowering::Custom: {
2262 Tmp1 = TLI.LowerOperation(Result, DAG);
2263 if (Tmp1.Val) Result = Tmp1;
2266 case TargetLowering::Expand:
2267 if (Tmp1.getOpcode() == ISD::SETCC) {
2268 Result = DAG.getSelectCC(Tmp1.getOperand(0), Tmp1.getOperand(1),
2270 cast<CondCodeSDNode>(Tmp1.getOperand(2))->get());
2272 Result = DAG.getSelectCC(Tmp1,
2273 DAG.getConstant(0, Tmp1.getValueType()),
2274 Tmp2, Tmp3, ISD::SETNE);
2277 case TargetLowering::Promote: {
2278 MVT::ValueType NVT =
2279 TLI.getTypeToPromoteTo(ISD::SELECT, Tmp2.getValueType());
2280 unsigned ExtOp, TruncOp;
2281 if (MVT::isVector(Tmp2.getValueType())) {
2282 ExtOp = ISD::BIT_CONVERT;
2283 TruncOp = ISD::BIT_CONVERT;
2284 } else if (MVT::isInteger(Tmp2.getValueType())) {
2285 ExtOp = ISD::ANY_EXTEND;
2286 TruncOp = ISD::TRUNCATE;
2288 ExtOp = ISD::FP_EXTEND;
2289 TruncOp = ISD::FP_ROUND;
2291 // Promote each of the values to the new type.
2292 Tmp2 = DAG.getNode(ExtOp, NVT, Tmp2);
2293 Tmp3 = DAG.getNode(ExtOp, NVT, Tmp3);
2294 // Perform the larger operation, then round down.
2295 Result = DAG.getNode(ISD::SELECT, NVT, Tmp1, Tmp2,Tmp3);
2296 Result = DAG.getNode(TruncOp, Node->getValueType(0), Result);
2301 case ISD::SELECT_CC: {
2302 Tmp1 = Node->getOperand(0); // LHS
2303 Tmp2 = Node->getOperand(1); // RHS
2304 Tmp3 = LegalizeOp(Node->getOperand(2)); // True
2305 Tmp4 = LegalizeOp(Node->getOperand(3)); // False
2306 SDOperand CC = Node->getOperand(4);
2308 LegalizeSetCCOperands(Tmp1, Tmp2, CC);
2310 // If we didn't get both a LHS and RHS back from LegalizeSetCCOperands,
2311 // the LHS is a legal SETCC itself. In this case, we need to compare
2312 // the result against zero to select between true and false values.
2313 if (Tmp2.Val == 0) {
2314 Tmp2 = DAG.getConstant(0, Tmp1.getValueType());
2315 CC = DAG.getCondCode(ISD::SETNE);
2317 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3, Tmp4, CC);
2319 // Everything is legal, see if we should expand this op or something.
2320 switch (TLI.getOperationAction(ISD::SELECT_CC, Tmp3.getValueType())) {
2321 default: assert(0 && "This action is not supported yet!");
2322 case TargetLowering::Legal: break;
2323 case TargetLowering::Custom:
2324 Tmp1 = TLI.LowerOperation(Result, DAG);
2325 if (Tmp1.Val) Result = Tmp1;
2331 Tmp1 = Node->getOperand(0);
2332 Tmp2 = Node->getOperand(1);
2333 Tmp3 = Node->getOperand(2);
2334 LegalizeSetCCOperands(Tmp1, Tmp2, Tmp3);
2336 // If we had to Expand the SetCC operands into a SELECT node, then it may
2337 // not always be possible to return a true LHS & RHS. In this case, just
2338 // return the value we legalized, returned in the LHS
2339 if (Tmp2.Val == 0) {
2344 switch (TLI.getOperationAction(ISD::SETCC, Tmp1.getValueType())) {
2345 default: assert(0 && "Cannot handle this action for SETCC yet!");
2346 case TargetLowering::Custom:
2349 case TargetLowering::Legal:
2350 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
2352 Tmp4 = TLI.LowerOperation(Result, DAG);
2353 if (Tmp4.Val) Result = Tmp4;
2356 case TargetLowering::Promote: {
2357 // First step, figure out the appropriate operation to use.
2358 // Allow SETCC to not be supported for all legal data types
2359 // Mostly this targets FP
2360 MVT::ValueType NewInTy = Node->getOperand(0).getValueType();
2361 MVT::ValueType OldVT = NewInTy; OldVT = OldVT;
2363 // Scan for the appropriate larger type to use.
2365 NewInTy = (MVT::ValueType)(NewInTy+1);
2367 assert(MVT::isInteger(NewInTy) == MVT::isInteger(OldVT) &&
2368 "Fell off of the edge of the integer world");
2369 assert(MVT::isFloatingPoint(NewInTy) == MVT::isFloatingPoint(OldVT) &&
2370 "Fell off of the edge of the floating point world");
2372 // If the target supports SETCC of this type, use it.
2373 if (TLI.isOperationLegal(ISD::SETCC, NewInTy))
2376 if (MVT::isInteger(NewInTy))
2377 assert(0 && "Cannot promote Legal Integer SETCC yet");
2379 Tmp1 = DAG.getNode(ISD::FP_EXTEND, NewInTy, Tmp1);
2380 Tmp2 = DAG.getNode(ISD::FP_EXTEND, NewInTy, Tmp2);
2382 Tmp1 = LegalizeOp(Tmp1);
2383 Tmp2 = LegalizeOp(Tmp2);
2384 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
2385 Result = LegalizeOp(Result);
2388 case TargetLowering::Expand:
2389 // Expand a setcc node into a select_cc of the same condition, lhs, and
2390 // rhs that selects between const 1 (true) and const 0 (false).
2391 MVT::ValueType VT = Node->getValueType(0);
2392 Result = DAG.getNode(ISD::SELECT_CC, VT, Tmp1, Tmp2,
2393 DAG.getConstant(1, VT), DAG.getConstant(0, VT),
2400 case ISD::MEMMOVE: {
2401 Tmp1 = LegalizeOp(Node->getOperand(0)); // Chain
2402 Tmp2 = LegalizeOp(Node->getOperand(1)); // Pointer
2404 if (Node->getOpcode() == ISD::MEMSET) { // memset = ubyte
2405 switch (getTypeAction(Node->getOperand(2).getValueType())) {
2406 case Expand: assert(0 && "Cannot expand a byte!");
2408 Tmp3 = LegalizeOp(Node->getOperand(2));
2411 Tmp3 = PromoteOp(Node->getOperand(2));
2415 Tmp3 = LegalizeOp(Node->getOperand(2)); // memcpy/move = pointer,
2419 switch (getTypeAction(Node->getOperand(3).getValueType())) {
2421 // Length is too big, just take the lo-part of the length.
2423 ExpandOp(Node->getOperand(3), Tmp4, HiPart);
2427 Tmp4 = LegalizeOp(Node->getOperand(3));
2430 Tmp4 = PromoteOp(Node->getOperand(3));
2435 switch (getTypeAction(Node->getOperand(4).getValueType())) { // uint
2436 case Expand: assert(0 && "Cannot expand this yet!");
2438 Tmp5 = LegalizeOp(Node->getOperand(4));
2441 Tmp5 = PromoteOp(Node->getOperand(4));
2445 switch (TLI.getOperationAction(Node->getOpcode(), MVT::Other)) {
2446 default: assert(0 && "This action not implemented for this operation!");
2447 case TargetLowering::Custom:
2450 case TargetLowering::Legal:
2451 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3, Tmp4, Tmp5);
2453 Tmp1 = TLI.LowerOperation(Result, DAG);
2454 if (Tmp1.Val) Result = Tmp1;
2457 case TargetLowering::Expand: {
2458 // Otherwise, the target does not support this operation. Lower the
2459 // operation to an explicit libcall as appropriate.
2460 MVT::ValueType IntPtr = TLI.getPointerTy();
2461 const Type *IntPtrTy = TLI.getTargetData()->getIntPtrType();
2462 TargetLowering::ArgListTy Args;
2463 TargetLowering::ArgListEntry Entry;
2465 const char *FnName = 0;
2466 if (Node->getOpcode() == ISD::MEMSET) {
2467 Entry.Node = Tmp2; Entry.Ty = IntPtrTy;
2468 Args.push_back(Entry);
2469 // Extend the (previously legalized) ubyte argument to be an int value
2471 if (Tmp3.getValueType() > MVT::i32)
2472 Tmp3 = DAG.getNode(ISD::TRUNCATE, MVT::i32, Tmp3);
2474 Tmp3 = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Tmp3);
2475 Entry.Node = Tmp3; Entry.Ty = Type::Int32Ty; Entry.isSExt = true;
2476 Args.push_back(Entry);
2477 Entry.Node = Tmp4; Entry.Ty = IntPtrTy; Entry.isSExt = false;
2478 Args.push_back(Entry);
2481 } else if (Node->getOpcode() == ISD::MEMCPY ||
2482 Node->getOpcode() == ISD::MEMMOVE) {
2483 Entry.Ty = IntPtrTy;
2484 Entry.Node = Tmp2; Args.push_back(Entry);
2485 Entry.Node = Tmp3; Args.push_back(Entry);
2486 Entry.Node = Tmp4; Args.push_back(Entry);
2487 FnName = Node->getOpcode() == ISD::MEMMOVE ? "memmove" : "memcpy";
2489 assert(0 && "Unknown op!");
2492 std::pair<SDOperand,SDOperand> CallResult =
2493 TLI.LowerCallTo(Tmp1, Type::VoidTy, false, false, CallingConv::C, false,
2494 DAG.getExternalSymbol(FnName, IntPtr), Args, DAG);
2495 Result = CallResult.second;
2502 case ISD::SHL_PARTS:
2503 case ISD::SRA_PARTS:
2504 case ISD::SRL_PARTS: {
2505 SmallVector<SDOperand, 8> Ops;
2506 bool Changed = false;
2507 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
2508 Ops.push_back(LegalizeOp(Node->getOperand(i)));
2509 Changed |= Ops.back() != Node->getOperand(i);
2512 Result = DAG.UpdateNodeOperands(Result, &Ops[0], Ops.size());
2514 switch (TLI.getOperationAction(Node->getOpcode(),
2515 Node->getValueType(0))) {
2516 default: assert(0 && "This action is not supported yet!");
2517 case TargetLowering::Legal: break;
2518 case TargetLowering::Custom:
2519 Tmp1 = TLI.LowerOperation(Result, DAG);
2521 SDOperand Tmp2, RetVal(0, 0);
2522 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i) {
2523 Tmp2 = LegalizeOp(Tmp1.getValue(i));
2524 AddLegalizedOperand(SDOperand(Node, i), Tmp2);
2528 assert(RetVal.Val && "Illegal result number");
2534 // Since these produce multiple values, make sure to remember that we
2535 // legalized all of them.
2536 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
2537 AddLegalizedOperand(SDOperand(Node, i), Result.getValue(i));
2538 return Result.getValue(Op.ResNo);
2559 Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
2560 switch (getTypeAction(Node->getOperand(1).getValueType())) {
2561 case Expand: assert(0 && "Not possible");
2563 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the RHS.
2566 Tmp2 = PromoteOp(Node->getOperand(1)); // Promote the RHS.
2570 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2572 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
2573 default: assert(0 && "BinOp legalize operation not supported");
2574 case TargetLowering::Legal: break;
2575 case TargetLowering::Custom:
2576 Tmp1 = TLI.LowerOperation(Result, DAG);
2577 if (Tmp1.Val) Result = Tmp1;
2579 case TargetLowering::Expand: {
2580 if (Node->getValueType(0) == MVT::i32) {
2581 switch (Node->getOpcode()) {
2582 default: assert(0 && "Do not know how to expand this integer BinOp!");
2585 RTLIB::Libcall LC = Node->getOpcode() == ISD::UDIV
2586 ? RTLIB::UDIV_I32 : RTLIB::SDIV_I32;
2588 bool isSigned = Node->getOpcode() == ISD::SDIV;
2589 Result = ExpandLibCall(TLI.getLibcallName(LC), Node, isSigned, Dummy);
2594 assert(MVT::isVector(Node->getValueType(0)) &&
2595 "Cannot expand this binary operator!");
2596 // Expand the operation into a bunch of nasty scalar code.
2597 SmallVector<SDOperand, 8> Ops;
2598 MVT::ValueType EltVT = MVT::getVectorElementType(Node->getValueType(0));
2599 MVT::ValueType PtrVT = TLI.getPointerTy();
2600 for (unsigned i = 0, e = MVT::getVectorNumElements(Node->getValueType(0));
2602 SDOperand Idx = DAG.getConstant(i, PtrVT);
2603 SDOperand LHS = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, EltVT, Tmp1, Idx);
2604 SDOperand RHS = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, EltVT, Tmp2, Idx);
2605 Ops.push_back(DAG.getNode(Node->getOpcode(), EltVT, LHS, RHS));
2607 Result = DAG.getNode(ISD::BUILD_VECTOR, Node->getValueType(0),
2608 &Ops[0], Ops.size());
2611 case TargetLowering::Promote: {
2612 switch (Node->getOpcode()) {
2613 default: assert(0 && "Do not know how to promote this BinOp!");
2617 MVT::ValueType OVT = Node->getValueType(0);
2618 MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
2619 assert(MVT::isVector(OVT) && "Cannot promote this BinOp!");
2620 // Bit convert each of the values to the new type.
2621 Tmp1 = DAG.getNode(ISD::BIT_CONVERT, NVT, Tmp1);
2622 Tmp2 = DAG.getNode(ISD::BIT_CONVERT, NVT, Tmp2);
2623 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
2624 // Bit convert the result back the original type.
2625 Result = DAG.getNode(ISD::BIT_CONVERT, OVT, Result);
2633 case ISD::FCOPYSIGN: // FCOPYSIGN does not require LHS/RHS to match type!
2634 Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
2635 switch (getTypeAction(Node->getOperand(1).getValueType())) {
2636 case Expand: assert(0 && "Not possible");
2638 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the RHS.
2641 Tmp2 = PromoteOp(Node->getOperand(1)); // Promote the RHS.
2645 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2647 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
2648 default: assert(0 && "Operation not supported");
2649 case TargetLowering::Custom:
2650 Tmp1 = TLI.LowerOperation(Result, DAG);
2651 if (Tmp1.Val) Result = Tmp1;
2653 case TargetLowering::Legal: break;
2654 case TargetLowering::Expand: {
2655 // If this target supports fabs/fneg natively and select is cheap,
2656 // do this efficiently.
2657 if (!TLI.isSelectExpensive() &&
2658 TLI.getOperationAction(ISD::FABS, Tmp1.getValueType()) ==
2659 TargetLowering::Legal &&
2660 TLI.getOperationAction(ISD::FNEG, Tmp1.getValueType()) ==
2661 TargetLowering::Legal) {
2662 // Get the sign bit of the RHS.
2663 MVT::ValueType IVT =
2664 Tmp2.getValueType() == MVT::f32 ? MVT::i32 : MVT::i64;
2665 SDOperand SignBit = DAG.getNode(ISD::BIT_CONVERT, IVT, Tmp2);
2666 SignBit = DAG.getSetCC(TLI.getSetCCResultTy(),
2667 SignBit, DAG.getConstant(0, IVT), ISD::SETLT);
2668 // Get the absolute value of the result.
2669 SDOperand AbsVal = DAG.getNode(ISD::FABS, Tmp1.getValueType(), Tmp1);
2670 // Select between the nabs and abs value based on the sign bit of
2672 Result = DAG.getNode(ISD::SELECT, AbsVal.getValueType(), SignBit,
2673 DAG.getNode(ISD::FNEG, AbsVal.getValueType(),
2676 Result = LegalizeOp(Result);
2680 // Otherwise, do bitwise ops!
2681 MVT::ValueType NVT =
2682 Node->getValueType(0) == MVT::f32 ? MVT::i32 : MVT::i64;
2683 Result = ExpandFCOPYSIGNToBitwiseOps(Node, NVT, DAG, TLI);
2684 Result = DAG.getNode(ISD::BIT_CONVERT, Node->getValueType(0), Result);
2685 Result = LegalizeOp(Result);
2693 Tmp1 = LegalizeOp(Node->getOperand(0));
2694 Tmp2 = LegalizeOp(Node->getOperand(1));
2695 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2696 // Since this produces two values, make sure to remember that we legalized
2698 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
2699 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
2704 Tmp1 = LegalizeOp(Node->getOperand(0));
2705 Tmp2 = LegalizeOp(Node->getOperand(1));
2706 Tmp3 = LegalizeOp(Node->getOperand(2));
2707 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3);
2708 // Since this produces two values, make sure to remember that we legalized
2710 AddLegalizedOperand(SDOperand(Node, 0), Result.getValue(0));
2711 AddLegalizedOperand(SDOperand(Node, 1), Result.getValue(1));
2714 case ISD::BUILD_PAIR: {
2715 MVT::ValueType PairTy = Node->getValueType(0);
2716 // TODO: handle the case where the Lo and Hi operands are not of legal type
2717 Tmp1 = LegalizeOp(Node->getOperand(0)); // Lo
2718 Tmp2 = LegalizeOp(Node->getOperand(1)); // Hi
2719 switch (TLI.getOperationAction(ISD::BUILD_PAIR, PairTy)) {
2720 case TargetLowering::Promote:
2721 case TargetLowering::Custom:
2722 assert(0 && "Cannot promote/custom this yet!");
2723 case TargetLowering::Legal:
2724 if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1))
2725 Result = DAG.getNode(ISD::BUILD_PAIR, PairTy, Tmp1, Tmp2);
2727 case TargetLowering::Expand:
2728 Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, PairTy, Tmp1);
2729 Tmp2 = DAG.getNode(ISD::ANY_EXTEND, PairTy, Tmp2);
2730 Tmp2 = DAG.getNode(ISD::SHL, PairTy, Tmp2,
2731 DAG.getConstant(MVT::getSizeInBits(PairTy)/2,
2732 TLI.getShiftAmountTy()));
2733 Result = DAG.getNode(ISD::OR, PairTy, Tmp1, Tmp2);
2742 Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
2743 Tmp2 = LegalizeOp(Node->getOperand(1)); // RHS
2745 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
2746 case TargetLowering::Promote: assert(0 && "Cannot promote this yet!");
2747 case TargetLowering::Custom:
2750 case TargetLowering::Legal:
2751 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2753 Tmp1 = TLI.LowerOperation(Result, DAG);
2754 if (Tmp1.Val) Result = Tmp1;
2757 case TargetLowering::Expand:
2758 unsigned DivOpc= (Node->getOpcode() == ISD::UREM) ? ISD::UDIV : ISD::SDIV;
2759 bool isSigned = DivOpc == ISD::SDIV;
2760 if (MVT::isInteger(Node->getValueType(0))) {
2761 if (TLI.getOperationAction(DivOpc, Node->getValueType(0)) ==
2762 TargetLowering::Legal) {
2764 MVT::ValueType VT = Node->getValueType(0);
2765 Result = DAG.getNode(DivOpc, VT, Tmp1, Tmp2);
2766 Result = DAG.getNode(ISD::MUL, VT, Result, Tmp2);
2767 Result = DAG.getNode(ISD::SUB, VT, Tmp1, Result);
2769 assert(Node->getValueType(0) == MVT::i32 &&
2770 "Cannot expand this binary operator!");
2771 RTLIB::Libcall LC = Node->getOpcode() == ISD::UREM
2772 ? RTLIB::UREM_I32 : RTLIB::SREM_I32;
2774 Result = ExpandLibCall(TLI.getLibcallName(LC), Node, isSigned, Dummy);
2777 // Floating point mod -> fmod libcall.
2778 RTLIB::Libcall LC = Node->getValueType(0) == MVT::f32
2779 ? RTLIB::REM_F32 : RTLIB::REM_F64;
2781 Result = ExpandLibCall(TLI.getLibcallName(LC), Node,
2782 false/*sign irrelevant*/, Dummy);
2788 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2789 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
2791 MVT::ValueType VT = Node->getValueType(0);
2792 switch (TLI.getOperationAction(Node->getOpcode(), MVT::Other)) {
2793 default: assert(0 && "This action is not supported yet!");
2794 case TargetLowering::Custom:
2797 case TargetLowering::Legal:
2798 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
2799 Result = Result.getValue(0);
2800 Tmp1 = Result.getValue(1);
2803 Tmp2 = TLI.LowerOperation(Result, DAG);
2805 Result = LegalizeOp(Tmp2);
2806 Tmp1 = LegalizeOp(Tmp2.getValue(1));
2810 case TargetLowering::Expand: {
2811 SrcValueSDNode *SV = cast<SrcValueSDNode>(Node->getOperand(2));
2812 SDOperand VAList = DAG.getLoad(TLI.getPointerTy(), Tmp1, Tmp2,
2813 SV->getValue(), SV->getOffset());
2814 // Increment the pointer, VAList, to the next vaarg
2815 Tmp3 = DAG.getNode(ISD::ADD, TLI.getPointerTy(), VAList,
2816 DAG.getConstant(MVT::getSizeInBits(VT)/8,
2817 TLI.getPointerTy()));
2818 // Store the incremented VAList to the legalized pointer
2819 Tmp3 = DAG.getStore(VAList.getValue(1), Tmp3, Tmp2, SV->getValue(),
2821 // Load the actual argument out of the pointer VAList
2822 Result = DAG.getLoad(VT, Tmp3, VAList, NULL, 0);
2823 Tmp1 = LegalizeOp(Result.getValue(1));
2824 Result = LegalizeOp(Result);
2828 // Since VAARG produces two values, make sure to remember that we
2829 // legalized both of them.
2830 AddLegalizedOperand(SDOperand(Node, 0), Result);
2831 AddLegalizedOperand(SDOperand(Node, 1), Tmp1);
2832 return Op.ResNo ? Tmp1 : Result;
2836 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2837 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the dest pointer.
2838 Tmp3 = LegalizeOp(Node->getOperand(2)); // Legalize the source pointer.
2840 switch (TLI.getOperationAction(ISD::VACOPY, MVT::Other)) {
2841 default: assert(0 && "This action is not supported yet!");
2842 case TargetLowering::Custom:
2845 case TargetLowering::Legal:
2846 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Tmp3,
2847 Node->getOperand(3), Node->getOperand(4));
2849 Tmp1 = TLI.LowerOperation(Result, DAG);
2850 if (Tmp1.Val) Result = Tmp1;
2853 case TargetLowering::Expand:
2854 // This defaults to loading a pointer from the input and storing it to the
2855 // output, returning the chain.
2856 SrcValueSDNode *SVD = cast<SrcValueSDNode>(Node->getOperand(3));
2857 SrcValueSDNode *SVS = cast<SrcValueSDNode>(Node->getOperand(4));
2858 Tmp4 = DAG.getLoad(TLI.getPointerTy(), Tmp1, Tmp3, SVD->getValue(),
2860 Result = DAG.getStore(Tmp4.getValue(1), Tmp4, Tmp2, SVS->getValue(),
2867 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2868 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
2870 switch (TLI.getOperationAction(ISD::VAEND, MVT::Other)) {
2871 default: assert(0 && "This action is not supported yet!");
2872 case TargetLowering::Custom:
2875 case TargetLowering::Legal:
2876 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
2878 Tmp1 = TLI.LowerOperation(Tmp1, DAG);
2879 if (Tmp1.Val) Result = Tmp1;
2882 case TargetLowering::Expand:
2883 Result = Tmp1; // Default to a no-op, return the chain
2889 Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain.
2890 Tmp2 = LegalizeOp(Node->getOperand(1)); // Legalize the pointer.
2892 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2, Node->getOperand(2));
2894 switch (TLI.getOperationAction(ISD::VASTART, MVT::Other)) {
2895 default: assert(0 && "This action is not supported yet!");
2896 case TargetLowering::Legal: break;
2897 case TargetLowering::Custom:
2898 Tmp1 = TLI.LowerOperation(Result, DAG);
2899 if (Tmp1.Val) Result = Tmp1;
2906 Tmp1 = LegalizeOp(Node->getOperand(0)); // LHS
2907 Tmp2 = LegalizeOp(Node->getOperand(1)); // RHS
2908 Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
2909 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
2911 assert(0 && "ROTL/ROTR legalize operation not supported");
2913 case TargetLowering::Legal:
2915 case TargetLowering::Custom:
2916 Tmp1 = TLI.LowerOperation(Result, DAG);
2917 if (Tmp1.Val) Result = Tmp1;
2919 case TargetLowering::Promote:
2920 assert(0 && "Do not know how to promote ROTL/ROTR");
2922 case TargetLowering::Expand:
2923 assert(0 && "Do not know how to expand ROTL/ROTR");
2929 Tmp1 = LegalizeOp(Node->getOperand(0)); // Op
2930 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
2931 case TargetLowering::Custom:
2932 assert(0 && "Cannot custom legalize this yet!");
2933 case TargetLowering::Legal:
2934 Result = DAG.UpdateNodeOperands(Result, Tmp1);
2936 case TargetLowering::Promote: {
2937 MVT::ValueType OVT = Tmp1.getValueType();
2938 MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
2939 unsigned DiffBits = MVT::getSizeInBits(NVT) - MVT::getSizeInBits(OVT);
2941 Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Tmp1);
2942 Tmp1 = DAG.getNode(ISD::BSWAP, NVT, Tmp1);
2943 Result = DAG.getNode(ISD::SRL, NVT, Tmp1,
2944 DAG.getConstant(DiffBits, TLI.getShiftAmountTy()));
2947 case TargetLowering::Expand:
2948 Result = ExpandBSWAP(Tmp1);
2956 Tmp1 = LegalizeOp(Node->getOperand(0)); // Op
2957 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
2958 case TargetLowering::Custom:
2959 case TargetLowering::Legal:
2960 Result = DAG.UpdateNodeOperands(Result, Tmp1);
2961 if (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0)) ==
2962 TargetLowering::Custom) {
2963 Tmp1 = TLI.LowerOperation(Result, DAG);
2969 case TargetLowering::Promote: {
2970 MVT::ValueType OVT = Tmp1.getValueType();
2971 MVT::ValueType NVT = TLI.getTypeToPromoteTo(Node->getOpcode(), OVT);
2973 // Zero extend the argument.
2974 Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Tmp1);
2975 // Perform the larger operation, then subtract if needed.
2976 Tmp1 = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1);
2977 switch (Node->getOpcode()) {
2982 //if Tmp1 == sizeinbits(NVT) then Tmp1 = sizeinbits(Old VT)
2983 Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), Tmp1,
2984 DAG.getConstant(MVT::getSizeInBits(NVT), NVT),
2986 Result = DAG.getNode(ISD::SELECT, NVT, Tmp2,
2987 DAG.getConstant(MVT::getSizeInBits(OVT),NVT), Tmp1);
2990 // Tmp1 = Tmp1 - (sizeinbits(NVT) - sizeinbits(Old VT))
2991 Result = DAG.getNode(ISD::SUB, NVT, Tmp1,
2992 DAG.getConstant(MVT::getSizeInBits(NVT) -
2993 MVT::getSizeInBits(OVT), NVT));
2998 case TargetLowering::Expand:
2999 Result = ExpandBitCount(Node->getOpcode(), Tmp1);
3010 Tmp1 = LegalizeOp(Node->getOperand(0));
3011 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
3012 case TargetLowering::Promote:
3013 case TargetLowering::Custom:
3016 case TargetLowering::Legal:
3017 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3019 Tmp1 = TLI.LowerOperation(Result, DAG);
3020 if (Tmp1.Val) Result = Tmp1;
3023 case TargetLowering::Expand:
3024 switch (Node->getOpcode()) {
3025 default: assert(0 && "Unreachable!");
3027 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
3028 Tmp2 = DAG.getConstantFP(-0.0, Node->getValueType(0));
3029 Result = DAG.getNode(ISD::FSUB, Node->getValueType(0), Tmp2, Tmp1);
3032 // Expand Y = FABS(X) -> Y = (X >u 0.0) ? X : fneg(X).
3033 MVT::ValueType VT = Node->getValueType(0);
3034 Tmp2 = DAG.getConstantFP(0.0, VT);
3035 Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), Tmp1, Tmp2, ISD::SETUGT);
3036 Tmp3 = DAG.getNode(ISD::FNEG, VT, Tmp1);
3037 Result = DAG.getNode(ISD::SELECT, VT, Tmp2, Tmp1, Tmp3);
3043 MVT::ValueType VT = Node->getValueType(0);
3044 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
3045 switch(Node->getOpcode()) {
3047 LC = VT == MVT::f32 ? RTLIB::SQRT_F32 :
3048 VT == MVT::f64 ? RTLIB::SQRT_F64 : RTLIB::SQRT_LD;
3051 LC = VT == MVT::f32 ? RTLIB::SIN_F32 : RTLIB::SIN_F64;
3054 LC = VT == MVT::f32 ? RTLIB::COS_F32 : RTLIB::COS_F64;
3056 default: assert(0 && "Unreachable!");
3059 Result = ExpandLibCall(TLI.getLibcallName(LC), Node,
3060 false/*sign irrelevant*/, Dummy);
3068 // We always lower FPOWI into a libcall. No target support it yet.
3070 Node->getValueType(0) == MVT::f32 ? RTLIB::POWI_F32 :
3071 Node->getValueType(0) == MVT::f64 ? RTLIB::POWI_F64 :
3074 Result = ExpandLibCall(TLI.getLibcallName(LC), Node,
3075 false/*sign irrelevant*/, Dummy);
3078 case ISD::BIT_CONVERT:
3079 if (!isTypeLegal(Node->getOperand(0).getValueType())) {
3080 Result = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
3081 } else if (MVT::isVector(Op.getOperand(0).getValueType())) {
3082 // The input has to be a vector type, we have to either scalarize it, pack
3083 // it, or convert it based on whether the input vector type is legal.
3084 SDNode *InVal = Node->getOperand(0).Val;
3085 unsigned NumElems = MVT::getVectorNumElements(InVal->getValueType(0));
3086 MVT::ValueType EVT = MVT::getVectorElementType(InVal->getValueType(0));
3088 // Figure out if there is a simple type corresponding to this Vector
3089 // type. If so, convert to the vector type.
3090 MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
3091 if (TLI.isTypeLegal(TVT)) {
3092 // Turn this into a bit convert of the vector input.
3093 Result = DAG.getNode(ISD::BIT_CONVERT, Node->getValueType(0),
3094 LegalizeOp(Node->getOperand(0)));
3096 } else if (NumElems == 1) {
3097 // Turn this into a bit convert of the scalar input.
3098 Result = DAG.getNode(ISD::BIT_CONVERT, Node->getValueType(0),
3099 ScalarizeVectorOp(Node->getOperand(0)));
3102 // FIXME: UNIMP! Store then reload
3103 assert(0 && "Cast from unsupported vector type not implemented yet!");
3106 switch (TLI.getOperationAction(ISD::BIT_CONVERT,
3107 Node->getOperand(0).getValueType())) {
3108 default: assert(0 && "Unknown operation action!");
3109 case TargetLowering::Expand:
3110 Result = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
3112 case TargetLowering::Legal:
3113 Tmp1 = LegalizeOp(Node->getOperand(0));
3114 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3120 // Conversion operators. The source and destination have different types.
3121 case ISD::SINT_TO_FP:
3122 case ISD::UINT_TO_FP: {
3123 bool isSigned = Node->getOpcode() == ISD::SINT_TO_FP;
3124 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3126 switch (TLI.getOperationAction(Node->getOpcode(),
3127 Node->getOperand(0).getValueType())) {
3128 default: assert(0 && "Unknown operation action!");
3129 case TargetLowering::Custom:
3132 case TargetLowering::Legal:
3133 Tmp1 = LegalizeOp(Node->getOperand(0));
3134 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3136 Tmp1 = TLI.LowerOperation(Result, DAG);
3137 if (Tmp1.Val) Result = Tmp1;
3140 case TargetLowering::Expand:
3141 Result = ExpandLegalINT_TO_FP(isSigned,
3142 LegalizeOp(Node->getOperand(0)),
3143 Node->getValueType(0));
3145 case TargetLowering::Promote:
3146 Result = PromoteLegalINT_TO_FP(LegalizeOp(Node->getOperand(0)),
3147 Node->getValueType(0),
3153 Result = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP,
3154 Node->getValueType(0), Node->getOperand(0));
3157 Tmp1 = PromoteOp(Node->getOperand(0));
3159 Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, Tmp1.getValueType(),
3160 Tmp1, DAG.getValueType(Node->getOperand(0).getValueType()));
3162 Tmp1 = DAG.getZeroExtendInReg(Tmp1,
3163 Node->getOperand(0).getValueType());
3165 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3166 Result = LegalizeOp(Result); // The 'op' is not necessarily legal!
3172 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3174 Tmp1 = LegalizeOp(Node->getOperand(0));
3175 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3178 ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
3180 // Since the result is legal, we should just be able to truncate the low
3181 // part of the source.
3182 Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), Tmp1);
3185 Result = PromoteOp(Node->getOperand(0));
3186 Result = DAG.getNode(ISD::TRUNCATE, Op.getValueType(), Result);
3191 case ISD::FP_TO_SINT:
3192 case ISD::FP_TO_UINT:
3193 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3195 Tmp1 = LegalizeOp(Node->getOperand(0));
3197 switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))){
3198 default: assert(0 && "Unknown operation action!");
3199 case TargetLowering::Custom:
3202 case TargetLowering::Legal:
3203 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3205 Tmp1 = TLI.LowerOperation(Result, DAG);
3206 if (Tmp1.Val) Result = Tmp1;
3209 case TargetLowering::Promote:
3210 Result = PromoteLegalFP_TO_INT(Tmp1, Node->getValueType(0),
3211 Node->getOpcode() == ISD::FP_TO_SINT);
3213 case TargetLowering::Expand:
3214 if (Node->getOpcode() == ISD::FP_TO_UINT) {
3215 SDOperand True, False;
3216 MVT::ValueType VT = Node->getOperand(0).getValueType();
3217 MVT::ValueType NVT = Node->getValueType(0);
3218 unsigned ShiftAmt = MVT::getSizeInBits(NVT)-1;
3219 const uint64_t zero[] = {0, 0};
3220 APFloat apf = APFloat(APInt(MVT::getSizeInBits(VT), 2, zero));
3221 uint64_t x = 1ULL << ShiftAmt;
3222 (void)apf.convertFromInteger(&x, MVT::getSizeInBits(NVT), false,
3223 APFloat::rmTowardZero);
3224 Tmp2 = DAG.getConstantFP(apf, VT);
3225 Tmp3 = DAG.getSetCC(TLI.getSetCCResultTy(),
3226 Node->getOperand(0), Tmp2, ISD::SETLT);
3227 True = DAG.getNode(ISD::FP_TO_SINT, NVT, Node->getOperand(0));
3228 False = DAG.getNode(ISD::FP_TO_SINT, NVT,
3229 DAG.getNode(ISD::FSUB, VT, Node->getOperand(0),
3231 False = DAG.getNode(ISD::XOR, NVT, False,
3232 DAG.getConstant(1ULL << ShiftAmt, NVT));
3233 Result = DAG.getNode(ISD::SELECT, NVT, Tmp3, True, False);
3236 assert(0 && "Do not know how to expand FP_TO_SINT yet!");
3242 // Convert f32 / f64 to i32 / i64.
3243 MVT::ValueType VT = Op.getValueType();
3244 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
3245 switch (Node->getOpcode()) {
3246 case ISD::FP_TO_SINT: {
3247 MVT::ValueType OVT = Node->getOperand(0).getValueType();
3248 if (OVT == MVT::f32)
3249 LC = (VT == MVT::i32)
3250 ? RTLIB::FPTOSINT_F32_I32 : RTLIB::FPTOSINT_F32_I64;
3251 else if (OVT == MVT::f64)
3252 LC = (VT == MVT::i32)
3253 ? RTLIB::FPTOSINT_F64_I32 : RTLIB::FPTOSINT_F64_I64;
3254 else if (OVT == MVT::f80 || OVT == MVT::f128 || OVT == MVT::ppcf128) {
3255 assert(VT == MVT::i64);
3256 LC = RTLIB::FPTOSINT_LD_I64;
3260 case ISD::FP_TO_UINT: {
3261 MVT::ValueType OVT = Node->getOperand(0).getValueType();
3262 if (OVT == MVT::f32)
3263 LC = (VT == MVT::i32)
3264 ? RTLIB::FPTOUINT_F32_I32 : RTLIB::FPTOSINT_F32_I64;
3265 else if (OVT == MVT::f64)
3266 LC = (VT == MVT::i32)
3267 ? RTLIB::FPTOUINT_F64_I32 : RTLIB::FPTOSINT_F64_I64;
3268 else if (OVT == MVT::f80 || OVT == MVT::f128 || OVT == MVT::ppcf128) {
3269 LC = (VT == MVT::i32)
3270 ? RTLIB::FPTOUINT_LD_I32 : RTLIB::FPTOUINT_LD_I64;
3274 default: assert(0 && "Unreachable!");
3277 Result = ExpandLibCall(TLI.getLibcallName(LC), Node,
3278 false/*sign irrelevant*/, Dummy);
3282 Tmp1 = PromoteOp(Node->getOperand(0));
3283 Result = DAG.UpdateNodeOperands(Result, LegalizeOp(Tmp1));
3284 Result = LegalizeOp(Result);
3289 case ISD::FP_EXTEND:
3290 case ISD::FP_ROUND: {
3291 MVT::ValueType newVT = Op.getValueType();
3292 MVT::ValueType oldVT = Op.getOperand(0).getValueType();
3293 if (TLI.getConvertAction(oldVT, newVT) == TargetLowering::Expand) {
3294 // The only way we can lower this is to turn it into a STORE,
3295 // LOAD pair, targetting a temporary location (a stack slot).
3297 // NOTE: there is a choice here between constantly creating new stack
3298 // slots and always reusing the same one. We currently always create
3299 // new ones, as reuse may inhibit scheduling.
3300 MVT::ValueType slotVT =
3301 (Node->getOpcode() == ISD::FP_EXTEND) ? oldVT : newVT;
3302 const Type *Ty = MVT::getTypeForValueType(slotVT);
3303 uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
3304 unsigned Align = TLI.getTargetData()->getPrefTypeAlignment(Ty);
3305 MachineFunction &MF = DAG.getMachineFunction();
3307 MF.getFrameInfo()->CreateStackObject(TySize, Align);
3308 SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
3309 if (Node->getOpcode() == ISD::FP_EXTEND) {
3310 Result = DAG.getStore(DAG.getEntryNode(), Node->getOperand(0),
3311 StackSlot, NULL, 0);
3312 Result = DAG.getExtLoad(ISD::EXTLOAD, newVT,
3313 Result, StackSlot, NULL, 0, oldVT);
3315 Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0),
3316 StackSlot, NULL, 0, newVT);
3317 Result = DAG.getLoad(newVT, Result, StackSlot, NULL, 0, newVT);
3323 case ISD::ANY_EXTEND:
3324 case ISD::ZERO_EXTEND:
3325 case ISD::SIGN_EXTEND:
3326 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3327 case Expand: assert(0 && "Shouldn't need to expand other operators here!");
3329 Tmp1 = LegalizeOp(Node->getOperand(0));
3330 Result = DAG.UpdateNodeOperands(Result, Tmp1);
3333 switch (Node->getOpcode()) {
3334 case ISD::ANY_EXTEND:
3335 Tmp1 = PromoteOp(Node->getOperand(0));
3336 Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Tmp1);
3338 case ISD::ZERO_EXTEND:
3339 Result = PromoteOp(Node->getOperand(0));
3340 Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Result);
3341 Result = DAG.getZeroExtendInReg(Result,
3342 Node->getOperand(0).getValueType());
3344 case ISD::SIGN_EXTEND:
3345 Result = PromoteOp(Node->getOperand(0));
3346 Result = DAG.getNode(ISD::ANY_EXTEND, Op.getValueType(), Result);
3347 Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
3349 DAG.getValueType(Node->getOperand(0).getValueType()));
3351 case ISD::FP_EXTEND:
3352 Result = PromoteOp(Node->getOperand(0));
3353 if (Result.getValueType() != Op.getValueType())
3354 // Dynamically dead while we have only 2 FP types.
3355 Result = DAG.getNode(ISD::FP_EXTEND, Op.getValueType(), Result);
3358 Result = PromoteOp(Node->getOperand(0));
3359 Result = DAG.getNode(Node->getOpcode(), Op.getValueType(), Result);
3364 case ISD::FP_ROUND_INREG:
3365 case ISD::SIGN_EXTEND_INREG: {
3366 Tmp1 = LegalizeOp(Node->getOperand(0));
3367 MVT::ValueType ExtraVT = cast<VTSDNode>(Node->getOperand(1))->getVT();
3369 // If this operation is not supported, convert it to a shl/shr or load/store
3371 switch (TLI.getOperationAction(Node->getOpcode(), ExtraVT)) {
3372 default: assert(0 && "This action not supported for this op yet!");
3373 case TargetLowering::Legal:
3374 Result = DAG.UpdateNodeOperands(Result, Tmp1, Node->getOperand(1));
3376 case TargetLowering::Expand:
3377 // If this is an integer extend and shifts are supported, do that.
3378 if (Node->getOpcode() == ISD::SIGN_EXTEND_INREG) {
3379 // NOTE: we could fall back on load/store here too for targets without
3380 // SAR. However, it is doubtful that any exist.
3381 unsigned BitsDiff = MVT::getSizeInBits(Node->getValueType(0)) -
3382 MVT::getSizeInBits(ExtraVT);
3383 SDOperand ShiftCst = DAG.getConstant(BitsDiff, TLI.getShiftAmountTy());
3384 Result = DAG.getNode(ISD::SHL, Node->getValueType(0),
3385 Node->getOperand(0), ShiftCst);
3386 Result = DAG.getNode(ISD::SRA, Node->getValueType(0),
3388 } else if (Node->getOpcode() == ISD::FP_ROUND_INREG) {
3389 // The only way we can lower this is to turn it into a TRUNCSTORE,
3390 // EXTLOAD pair, targetting a temporary location (a stack slot).
3392 // NOTE: there is a choice here between constantly creating new stack
3393 // slots and always reusing the same one. We currently always create
3394 // new ones, as reuse may inhibit scheduling.
3395 const Type *Ty = MVT::getTypeForValueType(ExtraVT);
3396 uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
3397 unsigned Align = TLI.getTargetData()->getPrefTypeAlignment(Ty);
3398 MachineFunction &MF = DAG.getMachineFunction();
3400 MF.getFrameInfo()->CreateStackObject(TySize, Align);
3401 SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
3402 Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0),
3403 StackSlot, NULL, 0, ExtraVT);
3404 Result = DAG.getExtLoad(ISD::EXTLOAD, Node->getValueType(0),
3405 Result, StackSlot, NULL, 0, ExtraVT);
3407 assert(0 && "Unknown op");
3413 case ISD::TRAMPOLINE: {
3415 for (unsigned i = 0; i != 6; ++i)
3416 Ops[i] = LegalizeOp(Node->getOperand(i));
3417 Result = DAG.UpdateNodeOperands(Result, Ops, 6);
3418 // The only option for this node is to custom lower it.
3419 Result = TLI.LowerOperation(Result, DAG);
3420 assert(Result.Val && "Should always custom lower!");
3422 // Since trampoline produces two values, make sure to remember that we
3423 // legalized both of them.
3424 Tmp1 = LegalizeOp(Result.getValue(1));
3425 Result = LegalizeOp(Result);
3426 AddLegalizedOperand(SDOperand(Node, 0), Result);
3427 AddLegalizedOperand(SDOperand(Node, 1), Tmp1);
3428 return Op.ResNo ? Tmp1 : Result;
3432 assert(Result.getValueType() == Op.getValueType() &&
3433 "Bad legalization!");
3435 // Make sure that the generated code is itself legal.
3437 Result = LegalizeOp(Result);
3439 // Note that LegalizeOp may be reentered even from single-use nodes, which
3440 // means that we always must cache transformed nodes.
3441 AddLegalizedOperand(Op, Result);
3445 /// PromoteOp - Given an operation that produces a value in an invalid type,
3446 /// promote it to compute the value into a larger type. The produced value will
3447 /// have the correct bits for the low portion of the register, but no guarantee
3448 /// is made about the top bits: it may be zero, sign-extended, or garbage.
3449 SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
3450 MVT::ValueType VT = Op.getValueType();
3451 MVT::ValueType NVT = TLI.getTypeToTransformTo(VT);
3452 assert(getTypeAction(VT) == Promote &&
3453 "Caller should expand or legalize operands that are not promotable!");
3454 assert(NVT > VT && MVT::isInteger(NVT) == MVT::isInteger(VT) &&
3455 "Cannot promote to smaller type!");
3457 SDOperand Tmp1, Tmp2, Tmp3;
3459 SDNode *Node = Op.Val;
3461 DenseMap<SDOperand, SDOperand>::iterator I = PromotedNodes.find(Op);
3462 if (I != PromotedNodes.end()) return I->second;
3464 switch (Node->getOpcode()) {
3465 case ISD::CopyFromReg:
3466 assert(0 && "CopyFromReg must be legal!");
3469 cerr << "NODE: "; Node->dump(&DAG); cerr << "\n";
3471 assert(0 && "Do not know how to promote this operator!");
3474 Result = DAG.getNode(ISD::UNDEF, NVT);
3478 Result = DAG.getNode(ISD::SIGN_EXTEND, NVT, Op);
3480 Result = DAG.getNode(ISD::ZERO_EXTEND, NVT, Op);
3481 assert(isa<ConstantSDNode>(Result) && "Didn't constant fold zext?");
3483 case ISD::ConstantFP:
3484 Result = DAG.getNode(ISD::FP_EXTEND, NVT, Op);
3485 assert(isa<ConstantFPSDNode>(Result) && "Didn't constant fold fp_extend?");
3489 assert(isTypeLegal(TLI.getSetCCResultTy()) && "SetCC type is not legal??");
3490 Result = DAG.getNode(ISD::SETCC, TLI.getSetCCResultTy(),Node->getOperand(0),
3491 Node->getOperand(1), Node->getOperand(2));
3495 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3497 Result = LegalizeOp(Node->getOperand(0));
3498 assert(Result.getValueType() >= NVT &&
3499 "This truncation doesn't make sense!");
3500 if (Result.getValueType() > NVT) // Truncate to NVT instead of VT
3501 Result = DAG.getNode(ISD::TRUNCATE, NVT, Result);
3504 // The truncation is not required, because we don't guarantee anything
3505 // about high bits anyway.
3506 Result = PromoteOp(Node->getOperand(0));
3509 ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
3510 // Truncate the low part of the expanded value to the result type
3511 Result = DAG.getNode(ISD::TRUNCATE, NVT, Tmp1);
3514 case ISD::SIGN_EXTEND:
3515 case ISD::ZERO_EXTEND:
3516 case ISD::ANY_EXTEND:
3517 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3518 case Expand: assert(0 && "BUG: Smaller reg should have been promoted!");
3520 // Input is legal? Just do extend all the way to the larger type.
3521 Result = DAG.getNode(Node->getOpcode(), NVT, Node->getOperand(0));
3524 // Promote the reg if it's smaller.
3525 Result = PromoteOp(Node->getOperand(0));
3526 // The high bits are not guaranteed to be anything. Insert an extend.
3527 if (Node->getOpcode() == ISD::SIGN_EXTEND)
3528 Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Result,
3529 DAG.getValueType(Node->getOperand(0).getValueType()));
3530 else if (Node->getOpcode() == ISD::ZERO_EXTEND)
3531 Result = DAG.getZeroExtendInReg(Result,
3532 Node->getOperand(0).getValueType());
3536 case ISD::BIT_CONVERT:
3537 Result = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0));
3538 Result = PromoteOp(Result);
3541 case ISD::FP_EXTEND:
3542 assert(0 && "Case not implemented. Dynamically dead with 2 FP types!");
3544 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3545 case Expand: assert(0 && "BUG: Cannot expand FP regs!");
3546 case Promote: assert(0 && "Unreachable with 2 FP types!");
3548 // Input is legal? Do an FP_ROUND_INREG.
3549 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Node->getOperand(0),
3550 DAG.getValueType(VT));
3555 case ISD::SINT_TO_FP:
3556 case ISD::UINT_TO_FP:
3557 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3559 // No extra round required here.
3560 Result = DAG.getNode(Node->getOpcode(), NVT, Node->getOperand(0));
3564 Result = PromoteOp(Node->getOperand(0));
3565 if (Node->getOpcode() == ISD::SINT_TO_FP)
3566 Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
3568 DAG.getValueType(Node->getOperand(0).getValueType()));
3570 Result = DAG.getZeroExtendInReg(Result,
3571 Node->getOperand(0).getValueType());
3572 // No extra round required here.
3573 Result = DAG.getNode(Node->getOpcode(), NVT, Result);
3576 Result = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP, NVT,
3577 Node->getOperand(0));
3578 // Round if we cannot tolerate excess precision.
3579 if (NoExcessFPPrecision)
3580 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3581 DAG.getValueType(VT));
3586 case ISD::SIGN_EXTEND_INREG:
3587 Result = PromoteOp(Node->getOperand(0));
3588 Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Result,
3589 Node->getOperand(1));
3591 case ISD::FP_TO_SINT:
3592 case ISD::FP_TO_UINT:
3593 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3596 Tmp1 = Node->getOperand(0);
3599 // The input result is prerounded, so we don't have to do anything
3601 Tmp1 = PromoteOp(Node->getOperand(0));
3604 // If we're promoting a UINT to a larger size, check to see if the new node
3605 // will be legal. If it isn't, check to see if FP_TO_SINT is legal, since
3606 // we can use that instead. This allows us to generate better code for
3607 // FP_TO_UINT for small destination sizes on targets where FP_TO_UINT is not
3608 // legal, such as PowerPC.
3609 if (Node->getOpcode() == ISD::FP_TO_UINT &&
3610 !TLI.isOperationLegal(ISD::FP_TO_UINT, NVT) &&
3611 (TLI.isOperationLegal(ISD::FP_TO_SINT, NVT) ||
3612 TLI.getOperationAction(ISD::FP_TO_SINT, NVT)==TargetLowering::Custom)){
3613 Result = DAG.getNode(ISD::FP_TO_SINT, NVT, Tmp1);
3615 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
3621 Tmp1 = PromoteOp(Node->getOperand(0));
3622 assert(Tmp1.getValueType() == NVT);
3623 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
3624 // NOTE: we do not have to do any extra rounding here for
3625 // NoExcessFPPrecision, because we know the input will have the appropriate
3626 // precision, and these operations don't modify precision at all.
3632 Tmp1 = PromoteOp(Node->getOperand(0));
3633 assert(Tmp1.getValueType() == NVT);
3634 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
3635 if (NoExcessFPPrecision)
3636 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3637 DAG.getValueType(VT));
3641 // Promote f32 powi to f64 powi. Note that this could insert a libcall
3642 // directly as well, which may be better.
3643 Tmp1 = PromoteOp(Node->getOperand(0));
3644 assert(Tmp1.getValueType() == NVT);
3645 Result = DAG.getNode(ISD::FPOWI, NVT, Tmp1, Node->getOperand(1));
3646 if (NoExcessFPPrecision)
3647 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3648 DAG.getValueType(VT));
3658 // The input may have strange things in the top bits of the registers, but
3659 // these operations don't care. They may have weird bits going out, but
3660 // that too is okay if they are integer operations.
3661 Tmp1 = PromoteOp(Node->getOperand(0));
3662 Tmp2 = PromoteOp(Node->getOperand(1));
3663 assert(Tmp1.getValueType() == NVT && Tmp2.getValueType() == NVT);
3664 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
3669 Tmp1 = PromoteOp(Node->getOperand(0));
3670 Tmp2 = PromoteOp(Node->getOperand(1));
3671 assert(Tmp1.getValueType() == NVT && Tmp2.getValueType() == NVT);
3672 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
3674 // Floating point operations will give excess precision that we may not be
3675 // able to tolerate. If we DO allow excess precision, just leave it,
3676 // otherwise excise it.
3677 // FIXME: Why would we need to round FP ops more than integer ones?
3678 // Is Round(Add(Add(A,B),C)) != Round(Add(Round(Add(A,B)), C))
3679 if (NoExcessFPPrecision)
3680 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3681 DAG.getValueType(VT));
3686 // These operators require that their input be sign extended.
3687 Tmp1 = PromoteOp(Node->getOperand(0));
3688 Tmp2 = PromoteOp(Node->getOperand(1));
3689 if (MVT::isInteger(NVT)) {
3690 Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp1,
3691 DAG.getValueType(VT));
3692 Tmp2 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp2,
3693 DAG.getValueType(VT));
3695 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
3697 // Perform FP_ROUND: this is probably overly pessimistic.
3698 if (MVT::isFloatingPoint(NVT) && NoExcessFPPrecision)
3699 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3700 DAG.getValueType(VT));
3704 case ISD::FCOPYSIGN:
3705 // These operators require that their input be fp extended.
3706 switch (getTypeAction(Node->getOperand(0).getValueType())) {
3708 Tmp1 = LegalizeOp(Node->getOperand(0));
3711 Tmp1 = PromoteOp(Node->getOperand(0));
3714 assert(0 && "not implemented");
3716 switch (getTypeAction(Node->getOperand(1).getValueType())) {
3718 Tmp2 = LegalizeOp(Node->getOperand(1));
3721 Tmp2 = PromoteOp(Node->getOperand(1));
3724 assert(0 && "not implemented");
3726 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
3728 // Perform FP_ROUND: this is probably overly pessimistic.
3729 if (NoExcessFPPrecision && Node->getOpcode() != ISD::FCOPYSIGN)
3730 Result = DAG.getNode(ISD::FP_ROUND_INREG, NVT, Result,
3731 DAG.getValueType(VT));
3736 // These operators require that their input be zero extended.
3737 Tmp1 = PromoteOp(Node->getOperand(0));
3738 Tmp2 = PromoteOp(Node->getOperand(1));
3739 assert(MVT::isInteger(NVT) && "Operators don't apply to FP!");
3740 Tmp1 = DAG.getZeroExtendInReg(Tmp1, VT);
3741 Tmp2 = DAG.getZeroExtendInReg(Tmp2, VT);
3742 Result = DAG.getNode(Node->getOpcode(), NVT, Tmp1, Tmp2);
3746 Tmp1 = PromoteOp(Node->getOperand(0));
3747 Result = DAG.getNode(ISD::SHL, NVT, Tmp1, Node->getOperand(1));
3750 // The input value must be properly sign extended.
3751 Tmp1 = PromoteOp(Node->getOperand(0));
3752 Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp1,
3753 DAG.getValueType(VT));
3754 Result = DAG.getNode(ISD::SRA, NVT, Tmp1, Node->getOperand(1));
3757 // The input value must be properly zero extended.
3758 Tmp1 = PromoteOp(Node->getOperand(0));
3759 Tmp1 = DAG.getZeroExtendInReg(Tmp1, VT);
3760 Result = DAG.getNode(ISD::SRL, NVT, Tmp1, Node->getOperand(1));
3764 Tmp1 = Node->getOperand(0); // Get the chain.
3765 Tmp2 = Node->getOperand(1); // Get the pointer.
3766 if (TLI.getOperationAction(ISD::VAARG, VT) == TargetLowering::Custom) {
3767 Tmp3 = DAG.getVAArg(VT, Tmp1, Tmp2, Node->getOperand(2));
3768 Result = TLI.CustomPromoteOperation(Tmp3, DAG);
3770 SrcValueSDNode *SV = cast<SrcValueSDNode>(Node->getOperand(2));
3771 SDOperand VAList = DAG.getLoad(TLI.getPointerTy(), Tmp1, Tmp2,
3772 SV->getValue(), SV->getOffset());
3773 // Increment the pointer, VAList, to the next vaarg
3774 Tmp3 = DAG.getNode(ISD::ADD, TLI.getPointerTy(), VAList,
3775 DAG.getConstant(MVT::getSizeInBits(VT)/8,
3776 TLI.getPointerTy()));
3777 // Store the incremented VAList to the legalized pointer
3778 Tmp3 = DAG.getStore(VAList.getValue(1), Tmp3, Tmp2, SV->getValue(),
3780 // Load the actual argument out of the pointer VAList
3781 Result = DAG.getExtLoad(ISD::EXTLOAD, NVT, Tmp3, VAList, NULL, 0, VT);
3783 // Remember that we legalized the chain.
3784 AddLegalizedOperand(Op.getValue(1), LegalizeOp(Result.getValue(1)));
3788 LoadSDNode *LD = cast<LoadSDNode>(Node);
3789 ISD::LoadExtType ExtType = ISD::isNON_EXTLoad(Node)
3790 ? ISD::EXTLOAD : LD->getExtensionType();
3791 Result = DAG.getExtLoad(ExtType, NVT,
3792 LD->getChain(), LD->getBasePtr(),
3793 LD->getSrcValue(), LD->getSrcValueOffset(),
3796 LD->getAlignment());
3797 // Remember that we legalized the chain.
3798 AddLegalizedOperand(Op.getValue(1), LegalizeOp(Result.getValue(1)));
3802 Tmp2 = PromoteOp(Node->getOperand(1)); // Legalize the op0
3803 Tmp3 = PromoteOp(Node->getOperand(2)); // Legalize the op1
3804 Result = DAG.getNode(ISD::SELECT, NVT, Node->getOperand(0), Tmp2, Tmp3);
3806 case ISD::SELECT_CC:
3807 Tmp2 = PromoteOp(Node->getOperand(2)); // True
3808 Tmp3 = PromoteOp(Node->getOperand(3)); // False
3809 Result = DAG.getNode(ISD::SELECT_CC, NVT, Node->getOperand(0),
3810 Node->getOperand(1), Tmp2, Tmp3, Node->getOperand(4));
3813 Tmp1 = Node->getOperand(0);
3814 Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Tmp1);
3815 Tmp1 = DAG.getNode(ISD::BSWAP, NVT, Tmp1);
3816 Result = DAG.getNode(ISD::SRL, NVT, Tmp1,
3817 DAG.getConstant(MVT::getSizeInBits(NVT) -
3818 MVT::getSizeInBits(VT),
3819 TLI.getShiftAmountTy()));
3824 // Zero extend the argument
3825 Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, NVT, Node->getOperand(0));
3826 // Perform the larger operation, then subtract if needed.
3827 Tmp1 = DAG.getNode(Node->getOpcode(), NVT, Tmp1);
3828 switch(Node->getOpcode()) {
3833 // if Tmp1 == sizeinbits(NVT) then Tmp1 = sizeinbits(Old VT)
3834 Tmp2 = DAG.getSetCC(TLI.getSetCCResultTy(), Tmp1,
3835 DAG.getConstant(MVT::getSizeInBits(NVT), NVT),
3837 Result = DAG.getNode(ISD::SELECT, NVT, Tmp2,
3838 DAG.getConstant(MVT::getSizeInBits(VT), NVT), Tmp1);
3841 //Tmp1 = Tmp1 - (sizeinbits(NVT) - sizeinbits(Old VT))
3842 Result = DAG.getNode(ISD::SUB, NVT, Tmp1,
3843 DAG.getConstant(MVT::getSizeInBits(NVT) -
3844 MVT::getSizeInBits(VT), NVT));
3848 case ISD::EXTRACT_SUBVECTOR:
3849 Result = PromoteOp(ExpandEXTRACT_SUBVECTOR(Op));
3851 case ISD::EXTRACT_VECTOR_ELT:
3852 Result = PromoteOp(ExpandEXTRACT_VECTOR_ELT(Op));
3856 assert(Result.Val && "Didn't set a result!");
3858 // Make sure the result is itself legal.
3859 Result = LegalizeOp(Result);
3861 // Remember that we promoted this!
3862 AddPromotedOperand(Op, Result);
3866 /// ExpandEXTRACT_VECTOR_ELT - Expand an EXTRACT_VECTOR_ELT operation into
3867 /// a legal EXTRACT_VECTOR_ELT operation, scalar code, or memory traffic,
3868 /// based on the vector type. The return type of this matches the element type
3869 /// of the vector, which may not be legal for the target.
3870 SDOperand SelectionDAGLegalize::ExpandEXTRACT_VECTOR_ELT(SDOperand Op) {
3871 // We know that operand #0 is the Vec vector. If the index is a constant
3872 // or if the invec is a supported hardware type, we can use it. Otherwise,
3873 // lower to a store then an indexed load.
3874 SDOperand Vec = Op.getOperand(0);
3875 SDOperand Idx = Op.getOperand(1);
3877 MVT::ValueType TVT = Vec.getValueType();
3878 unsigned NumElems = MVT::getVectorNumElements(TVT);
3880 switch (TLI.getOperationAction(ISD::EXTRACT_VECTOR_ELT, TVT)) {
3881 default: assert(0 && "This action is not supported yet!");
3882 case TargetLowering::Custom: {
3883 Vec = LegalizeOp(Vec);
3884 Op = DAG.UpdateNodeOperands(Op, Vec, Idx);
3885 SDOperand Tmp3 = TLI.LowerOperation(Op, DAG);
3890 case TargetLowering::Legal:
3891 if (isTypeLegal(TVT)) {
3892 Vec = LegalizeOp(Vec);
3893 Op = DAG.UpdateNodeOperands(Op, Vec, Idx);
3897 case TargetLowering::Expand:
3901 if (NumElems == 1) {
3902 // This must be an access of the only element. Return it.
3903 Op = ScalarizeVectorOp(Vec);
3904 } else if (!TLI.isTypeLegal(TVT) && isa<ConstantSDNode>(Idx)) {
3905 ConstantSDNode *CIdx = cast<ConstantSDNode>(Idx);
3907 SplitVectorOp(Vec, Lo, Hi);
3908 if (CIdx->getValue() < NumElems/2) {
3912 Idx = DAG.getConstant(CIdx->getValue() - NumElems/2,
3913 Idx.getValueType());
3916 // It's now an extract from the appropriate high or low part. Recurse.
3917 Op = DAG.UpdateNodeOperands(Op, Vec, Idx);
3918 Op = ExpandEXTRACT_VECTOR_ELT(Op);
3920 // Store the value to a temporary stack slot, then LOAD the scalar
3921 // element back out.
3922 SDOperand StackPtr = CreateStackTemporary(Vec.getValueType());
3923 SDOperand Ch = DAG.getStore(DAG.getEntryNode(), Vec, StackPtr, NULL, 0);
3925 // Add the offset to the index.
3926 unsigned EltSize = MVT::getSizeInBits(Op.getValueType())/8;
3927 Idx = DAG.getNode(ISD::MUL, Idx.getValueType(), Idx,
3928 DAG.getConstant(EltSize, Idx.getValueType()));
3929 StackPtr = DAG.getNode(ISD::ADD, Idx.getValueType(), Idx, StackPtr);
3931 Op = DAG.getLoad(Op.getValueType(), Ch, StackPtr, NULL, 0);
3936 /// ExpandEXTRACT_SUBVECTOR - Expand a EXTRACT_SUBVECTOR operation. For now
3937 /// we assume the operation can be split if it is not already legal.
3938 SDOperand SelectionDAGLegalize::ExpandEXTRACT_SUBVECTOR(SDOperand Op) {
3939 // We know that operand #0 is the Vec vector. For now we assume the index
3940 // is a constant and that the extracted result is a supported hardware type.
3941 SDOperand Vec = Op.getOperand(0);
3942 SDOperand Idx = LegalizeOp(Op.getOperand(1));
3944 unsigned NumElems = MVT::getVectorNumElements(Vec.getValueType());
3946 if (NumElems == MVT::getVectorNumElements(Op.getValueType())) {
3947 // This must be an access of the desired vector length. Return it.
3951 ConstantSDNode *CIdx = cast<ConstantSDNode>(Idx);
3953 SplitVectorOp(Vec, Lo, Hi);
3954 if (CIdx->getValue() < NumElems/2) {
3958 Idx = DAG.getConstant(CIdx->getValue() - NumElems/2, Idx.getValueType());
3961 // It's now an extract from the appropriate high or low part. Recurse.
3962 Op = DAG.UpdateNodeOperands(Op, Vec, Idx);
3963 return ExpandEXTRACT_SUBVECTOR(Op);
3966 /// LegalizeSetCCOperands - Attempts to create a legal LHS and RHS for a SETCC
3967 /// with condition CC on the current target. This usually involves legalizing
3968 /// or promoting the arguments. In the case where LHS and RHS must be expanded,
3969 /// there may be no choice but to create a new SetCC node to represent the
3970 /// legalized value of setcc lhs, rhs. In this case, the value is returned in
3971 /// LHS, and the SDOperand returned in RHS has a nil SDNode value.
3972 void SelectionDAGLegalize::LegalizeSetCCOperands(SDOperand &LHS,
3975 SDOperand Tmp1, Tmp2, Result;
3977 switch (getTypeAction(LHS.getValueType())) {
3979 Tmp1 = LegalizeOp(LHS); // LHS
3980 Tmp2 = LegalizeOp(RHS); // RHS
3983 Tmp1 = PromoteOp(LHS); // LHS
3984 Tmp2 = PromoteOp(RHS); // RHS
3986 // If this is an FP compare, the operands have already been extended.
3987 if (MVT::isInteger(LHS.getValueType())) {
3988 MVT::ValueType VT = LHS.getValueType();
3989 MVT::ValueType NVT = TLI.getTypeToTransformTo(VT);
3991 // Otherwise, we have to insert explicit sign or zero extends. Note
3992 // that we could insert sign extends for ALL conditions, but zero extend
3993 // is cheaper on many machines (an AND instead of two shifts), so prefer
3995 switch (cast<CondCodeSDNode>(CC)->get()) {
3996 default: assert(0 && "Unknown integer comparison!");
4003 // ALL of these operations will work if we either sign or zero extend
4004 // the operands (including the unsigned comparisons!). Zero extend is
4005 // usually a simpler/cheaper operation, so prefer it.
4006 Tmp1 = DAG.getZeroExtendInReg(Tmp1, VT);
4007 Tmp2 = DAG.getZeroExtendInReg(Tmp2, VT);
4013 Tmp1 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp1,
4014 DAG.getValueType(VT));
4015 Tmp2 = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Tmp2,
4016 DAG.getValueType(VT));
4022 MVT::ValueType VT = LHS.getValueType();
4023 if (VT == MVT::f32 || VT == MVT::f64) {
4024 // Expand into one or more soft-fp libcall(s).
4025 RTLIB::Libcall LC1, LC2 = RTLIB::UNKNOWN_LIBCALL;
4026 switch (cast<CondCodeSDNode>(CC)->get()) {
4029 LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
4033 LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
4037 LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
4041 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
4045 LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
4049 LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
4052 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
4055 LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
4058 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
4059 switch (cast<CondCodeSDNode>(CC)->get()) {
4061 // SETONE = SETOLT | SETOGT
4062 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
4065 LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
4068 LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
4071 LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
4074 LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
4077 LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
4079 default: assert(0 && "Unsupported FP setcc!");
4084 Tmp1 = ExpandLibCall(TLI.getLibcallName(LC1),
4085 DAG.getNode(ISD::MERGE_VALUES, VT, LHS, RHS).Val,
4086 false /*sign irrelevant*/, Dummy);
4087 Tmp2 = DAG.getConstant(0, MVT::i32);
4088 CC = DAG.getCondCode(TLI.getCmpLibcallCC(LC1));
4089 if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
4090 Tmp1 = DAG.getNode(ISD::SETCC, TLI.getSetCCResultTy(), Tmp1, Tmp2, CC);
4091 LHS = ExpandLibCall(TLI.getLibcallName(LC2),
4092 DAG.getNode(ISD::MERGE_VALUES, VT, LHS, RHS).Val,
4093 false /*sign irrelevant*/, Dummy);
4094 Tmp2 = DAG.getNode(ISD::SETCC, TLI.getSetCCResultTy(), LHS, Tmp2,
4095 DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
4096 Tmp1 = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp2);
4104 SDOperand LHSLo, LHSHi, RHSLo, RHSHi;
4105 ExpandOp(LHS, LHSLo, LHSHi);
4106 ExpandOp(RHS, RHSLo, RHSHi);
4107 switch (cast<CondCodeSDNode>(CC)->get()) {
4111 if (ConstantSDNode *RHSCST = dyn_cast<ConstantSDNode>(RHSLo))
4112 if (RHSCST->isAllOnesValue()) {
4113 // Comparison to -1.
4114 Tmp1 = DAG.getNode(ISD::AND, LHSLo.getValueType(), LHSLo, LHSHi);
4119 Tmp1 = DAG.getNode(ISD::XOR, LHSLo.getValueType(), LHSLo, RHSLo);
4120 Tmp2 = DAG.getNode(ISD::XOR, LHSLo.getValueType(), LHSHi, RHSHi);
4121 Tmp1 = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp2);
4122 Tmp2 = DAG.getConstant(0, Tmp1.getValueType());
4125 // If this is a comparison of the sign bit, just look at the top part.
4127 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(RHS))
4128 if ((cast<CondCodeSDNode>(CC)->get() == ISD::SETLT &&
4129 CST->getValue() == 0) || // X < 0
4130 (cast<CondCodeSDNode>(CC)->get() == ISD::SETGT &&
4131 CST->isAllOnesValue())) { // X > -1
4137 // FIXME: This generated code sucks.
4138 ISD::CondCode LowCC;
4139 ISD::CondCode CCCode = cast<CondCodeSDNode>(CC)->get();
4141 default: assert(0 && "Unknown integer setcc!");
4143 case ISD::SETULT: LowCC = ISD::SETULT; break;
4145 case ISD::SETUGT: LowCC = ISD::SETUGT; break;
4147 case ISD::SETULE: LowCC = ISD::SETULE; break;
4149 case ISD::SETUGE: LowCC = ISD::SETUGE; break;
4152 // Tmp1 = lo(op1) < lo(op2) // Always unsigned comparison
4153 // Tmp2 = hi(op1) < hi(op2) // Signedness depends on operands
4154 // dest = hi(op1) == hi(op2) ? Tmp1 : Tmp2;
4156 // NOTE: on targets without efficient SELECT of bools, we can always use
4157 // this identity: (B1 ? B2 : B3) --> (B1 & B2)|(!B1&B3)
4158 TargetLowering::DAGCombinerInfo DagCombineInfo(DAG, false, true, NULL);
4159 Tmp1 = TLI.SimplifySetCC(TLI.getSetCCResultTy(), LHSLo, RHSLo, LowCC,
4160 false, DagCombineInfo);
4162 Tmp1 = DAG.getSetCC(TLI.getSetCCResultTy(), LHSLo, RHSLo, LowCC);
4163 Tmp2 = TLI.SimplifySetCC(TLI.getSetCCResultTy(), LHSHi, RHSHi,
4164 CCCode, false, DagCombineInfo);
4166 Tmp2 = DAG.getNode(ISD::SETCC, TLI.getSetCCResultTy(), LHSHi, RHSHi, CC);
4168 ConstantSDNode *Tmp1C = dyn_cast<ConstantSDNode>(Tmp1.Val);
4169 ConstantSDNode *Tmp2C = dyn_cast<ConstantSDNode>(Tmp2.Val);
4170 if ((Tmp1C && Tmp1C->getValue() == 0) ||
4171 (Tmp2C && Tmp2C->getValue() == 0 &&
4172 (CCCode == ISD::SETLE || CCCode == ISD::SETGE ||
4173 CCCode == ISD::SETUGE || CCCode == ISD::SETULE)) ||
4174 (Tmp2C && Tmp2C->getValue() == 1 &&
4175 (CCCode == ISD::SETLT || CCCode == ISD::SETGT ||
4176 CCCode == ISD::SETUGT || CCCode == ISD::SETULT))) {
4177 // low part is known false, returns high part.
4178 // For LE / GE, if high part is known false, ignore the low part.
4179 // For LT / GT, if high part is known true, ignore the low part.
4183 Result = TLI.SimplifySetCC(TLI.getSetCCResultTy(), LHSHi, RHSHi,
4184 ISD::SETEQ, false, DagCombineInfo);
4186 Result=DAG.getSetCC(TLI.getSetCCResultTy(), LHSHi, RHSHi, ISD::SETEQ);
4187 Result = LegalizeOp(DAG.getNode(ISD::SELECT, Tmp1.getValueType(),
4188 Result, Tmp1, Tmp2));
4199 /// ExpandBIT_CONVERT - Expand a BIT_CONVERT node into a store/load combination.
4200 /// The resultant code need not be legal. Note that SrcOp is the input operand
4201 /// to the BIT_CONVERT, not the BIT_CONVERT node itself.
4202 SDOperand SelectionDAGLegalize::ExpandBIT_CONVERT(MVT::ValueType DestVT,
4204 // Create the stack frame object.
4205 SDOperand FIPtr = CreateStackTemporary(DestVT);
4207 // Emit a store to the stack slot.
4208 SDOperand Store = DAG.getStore(DAG.getEntryNode(), SrcOp, FIPtr, NULL, 0);
4209 // Result is a load from the stack slot.
4210 return DAG.getLoad(DestVT, Store, FIPtr, NULL, 0);
4213 SDOperand SelectionDAGLegalize::ExpandSCALAR_TO_VECTOR(SDNode *Node) {
4214 // Create a vector sized/aligned stack slot, store the value to element #0,
4215 // then load the whole vector back out.
4216 SDOperand StackPtr = CreateStackTemporary(Node->getValueType(0));
4217 SDOperand Ch = DAG.getStore(DAG.getEntryNode(), Node->getOperand(0), StackPtr,
4219 return DAG.getLoad(Node->getValueType(0), Ch, StackPtr, NULL, 0);
4223 /// ExpandBUILD_VECTOR - Expand a BUILD_VECTOR node on targets that don't
4224 /// support the operation, but do support the resultant vector type.
4225 SDOperand SelectionDAGLegalize::ExpandBUILD_VECTOR(SDNode *Node) {
4227 // If the only non-undef value is the low element, turn this into a
4228 // SCALAR_TO_VECTOR node. If this is { X, X, X, X }, determine X.
4229 unsigned NumElems = Node->getNumOperands();
4230 bool isOnlyLowElement = true;
4231 SDOperand SplatValue = Node->getOperand(0);
4232 std::map<SDOperand, std::vector<unsigned> > Values;
4233 Values[SplatValue].push_back(0);
4234 bool isConstant = true;
4235 if (!isa<ConstantFPSDNode>(SplatValue) && !isa<ConstantSDNode>(SplatValue) &&
4236 SplatValue.getOpcode() != ISD::UNDEF)
4239 for (unsigned i = 1; i < NumElems; ++i) {
4240 SDOperand V = Node->getOperand(i);
4241 Values[V].push_back(i);
4242 if (V.getOpcode() != ISD::UNDEF)
4243 isOnlyLowElement = false;
4244 if (SplatValue != V)
4245 SplatValue = SDOperand(0,0);
4247 // If this isn't a constant element or an undef, we can't use a constant
4249 if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V) &&
4250 V.getOpcode() != ISD::UNDEF)
4254 if (isOnlyLowElement) {
4255 // If the low element is an undef too, then this whole things is an undef.
4256 if (Node->getOperand(0).getOpcode() == ISD::UNDEF)
4257 return DAG.getNode(ISD::UNDEF, Node->getValueType(0));
4258 // Otherwise, turn this into a scalar_to_vector node.
4259 return DAG.getNode(ISD::SCALAR_TO_VECTOR, Node->getValueType(0),
4260 Node->getOperand(0));
4263 // If all elements are constants, create a load from the constant pool.
4265 MVT::ValueType VT = Node->getValueType(0);
4267 MVT::getTypeForValueType(Node->getOperand(0).getValueType());
4268 std::vector<Constant*> CV;
4269 for (unsigned i = 0, e = NumElems; i != e; ++i) {
4270 if (ConstantFPSDNode *V =
4271 dyn_cast<ConstantFPSDNode>(Node->getOperand(i))) {
4272 CV.push_back(ConstantFP::get(OpNTy, V->getValueAPF()));
4273 } else if (ConstantSDNode *V =
4274 dyn_cast<ConstantSDNode>(Node->getOperand(i))) {
4275 CV.push_back(ConstantInt::get(OpNTy, V->getValue()));
4277 assert(Node->getOperand(i).getOpcode() == ISD::UNDEF);
4278 CV.push_back(UndefValue::get(OpNTy));
4281 Constant *CP = ConstantVector::get(CV);
4282 SDOperand CPIdx = DAG.getConstantPool(CP, TLI.getPointerTy());
4283 return DAG.getLoad(VT, DAG.getEntryNode(), CPIdx, NULL, 0);
4286 if (SplatValue.Val) { // Splat of one value?
4287 // Build the shuffle constant vector: <0, 0, 0, 0>
4288 MVT::ValueType MaskVT =
4289 MVT::getIntVectorWithNumElements(NumElems);
4290 SDOperand Zero = DAG.getConstant(0, MVT::getVectorElementType(MaskVT));
4291 std::vector<SDOperand> ZeroVec(NumElems, Zero);
4292 SDOperand SplatMask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
4293 &ZeroVec[0], ZeroVec.size());
4295 // If the target supports VECTOR_SHUFFLE and this shuffle mask, use it.
4296 if (isShuffleLegal(Node->getValueType(0), SplatMask)) {
4297 // Get the splatted value into the low element of a vector register.
4298 SDOperand LowValVec =
4299 DAG.getNode(ISD::SCALAR_TO_VECTOR, Node->getValueType(0), SplatValue);
4301 // Return shuffle(LowValVec, undef, <0,0,0,0>)
4302 return DAG.getNode(ISD::VECTOR_SHUFFLE, Node->getValueType(0), LowValVec,
4303 DAG.getNode(ISD::UNDEF, Node->getValueType(0)),
4308 // If there are only two unique elements, we may be able to turn this into a
4310 if (Values.size() == 2) {
4311 // Build the shuffle constant vector: e.g. <0, 4, 0, 4>
4312 MVT::ValueType MaskVT =
4313 MVT::getIntVectorWithNumElements(NumElems);
4314 std::vector<SDOperand> MaskVec(NumElems);
4316 for (std::map<SDOperand,std::vector<unsigned> >::iterator I=Values.begin(),
4317 E = Values.end(); I != E; ++I) {
4318 for (std::vector<unsigned>::iterator II = I->second.begin(),
4319 EE = I->second.end(); II != EE; ++II)
4320 MaskVec[*II] = DAG.getConstant(i, MVT::getVectorElementType(MaskVT));
4323 SDOperand ShuffleMask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT,
4324 &MaskVec[0], MaskVec.size());
4326 // If the target supports VECTOR_SHUFFLE and this shuffle mask, use it.
4327 if (TLI.isOperationLegal(ISD::SCALAR_TO_VECTOR, Node->getValueType(0)) &&
4328 isShuffleLegal(Node->getValueType(0), ShuffleMask)) {
4329 SmallVector<SDOperand, 8> Ops;
4330 for(std::map<SDOperand,std::vector<unsigned> >::iterator I=Values.begin(),
4331 E = Values.end(); I != E; ++I) {
4332 SDOperand Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, Node->getValueType(0),
4336 Ops.push_back(ShuffleMask);
4338 // Return shuffle(LoValVec, HiValVec, <0,1,0,1>)
4339 return DAG.getNode(ISD::VECTOR_SHUFFLE, Node->getValueType(0),
4340 &Ops[0], Ops.size());
4344 // Otherwise, we can't handle this case efficiently. Allocate a sufficiently
4345 // aligned object on the stack, store each element into it, then load
4346 // the result as a vector.
4347 MVT::ValueType VT = Node->getValueType(0);
4348 // Create the stack frame object.
4349 SDOperand FIPtr = CreateStackTemporary(VT);
4351 // Emit a store of each element to the stack slot.
4352 SmallVector<SDOperand, 8> Stores;
4353 unsigned TypeByteSize =
4354 MVT::getSizeInBits(Node->getOperand(0).getValueType())/8;
4355 // Store (in the right endianness) the elements to memory.
4356 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
4357 // Ignore undef elements.
4358 if (Node->getOperand(i).getOpcode() == ISD::UNDEF) continue;
4360 unsigned Offset = TypeByteSize*i;
4362 SDOperand Idx = DAG.getConstant(Offset, FIPtr.getValueType());
4363 Idx = DAG.getNode(ISD::ADD, FIPtr.getValueType(), FIPtr, Idx);
4365 Stores.push_back(DAG.getStore(DAG.getEntryNode(), Node->getOperand(i), Idx,
4369 SDOperand StoreChain;
4370 if (!Stores.empty()) // Not all undef elements?
4371 StoreChain = DAG.getNode(ISD::TokenFactor, MVT::Other,
4372 &Stores[0], Stores.size());
4374 StoreChain = DAG.getEntryNode();
4376 // Result is a load from the stack slot.
4377 return DAG.getLoad(VT, StoreChain, FIPtr, NULL, 0);
4380 /// CreateStackTemporary - Create a stack temporary, suitable for holding the
4381 /// specified value type.
4382 SDOperand SelectionDAGLegalize::CreateStackTemporary(MVT::ValueType VT) {
4383 MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
4384 unsigned ByteSize = MVT::getSizeInBits(VT)/8;
4385 const Type *Ty = MVT::getTypeForValueType(VT);
4386 unsigned StackAlign = (unsigned)TLI.getTargetData()->getPrefTypeAlignment(Ty);
4387 int FrameIdx = FrameInfo->CreateStackObject(ByteSize, StackAlign);
4388 return DAG.getFrameIndex(FrameIdx, TLI.getPointerTy());
4391 void SelectionDAGLegalize::ExpandShiftParts(unsigned NodeOp,
4392 SDOperand Op, SDOperand Amt,
4393 SDOperand &Lo, SDOperand &Hi) {
4394 // Expand the subcomponents.
4395 SDOperand LHSL, LHSH;
4396 ExpandOp(Op, LHSL, LHSH);
4398 SDOperand Ops[] = { LHSL, LHSH, Amt };
4399 MVT::ValueType VT = LHSL.getValueType();
4400 Lo = DAG.getNode(NodeOp, DAG.getNodeValueTypes(VT, VT), 2, Ops, 3);
4401 Hi = Lo.getValue(1);
4405 /// ExpandShift - Try to find a clever way to expand this shift operation out to
4406 /// smaller elements. If we can't find a way that is more efficient than a
4407 /// libcall on this target, return false. Otherwise, return true with the
4408 /// low-parts expanded into Lo and Hi.
4409 bool SelectionDAGLegalize::ExpandShift(unsigned Opc, SDOperand Op,SDOperand Amt,
4410 SDOperand &Lo, SDOperand &Hi) {
4411 assert((Opc == ISD::SHL || Opc == ISD::SRA || Opc == ISD::SRL) &&
4412 "This is not a shift!");
4414 MVT::ValueType NVT = TLI.getTypeToTransformTo(Op.getValueType());
4415 SDOperand ShAmt = LegalizeOp(Amt);
4416 MVT::ValueType ShTy = ShAmt.getValueType();
4417 unsigned VTBits = MVT::getSizeInBits(Op.getValueType());
4418 unsigned NVTBits = MVT::getSizeInBits(NVT);
4420 // Handle the case when Amt is an immediate. Other cases are currently broken
4421 // and are disabled.
4422 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Amt.Val)) {
4423 unsigned Cst = CN->getValue();
4424 // Expand the incoming operand to be shifted, so that we have its parts
4426 ExpandOp(Op, InL, InH);
4430 Lo = DAG.getConstant(0, NVT);
4431 Hi = DAG.getConstant(0, NVT);
4432 } else if (Cst > NVTBits) {
4433 Lo = DAG.getConstant(0, NVT);
4434 Hi = DAG.getNode(ISD::SHL, NVT, InL, DAG.getConstant(Cst-NVTBits,ShTy));
4435 } else if (Cst == NVTBits) {
4436 Lo = DAG.getConstant(0, NVT);
4439 Lo = DAG.getNode(ISD::SHL, NVT, InL, DAG.getConstant(Cst, ShTy));
4440 Hi = DAG.getNode(ISD::OR, NVT,
4441 DAG.getNode(ISD::SHL, NVT, InH, DAG.getConstant(Cst, ShTy)),
4442 DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(NVTBits-Cst, ShTy)));
4447 Lo = DAG.getConstant(0, NVT);
4448 Hi = DAG.getConstant(0, NVT);
4449 } else if (Cst > NVTBits) {
4450 Lo = DAG.getNode(ISD::SRL, NVT, InH, DAG.getConstant(Cst-NVTBits,ShTy));
4451 Hi = DAG.getConstant(0, NVT);
4452 } else if (Cst == NVTBits) {
4454 Hi = DAG.getConstant(0, NVT);
4456 Lo = DAG.getNode(ISD::OR, NVT,
4457 DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(Cst, ShTy)),
4458 DAG.getNode(ISD::SHL, NVT, InH, DAG.getConstant(NVTBits-Cst, ShTy)));
4459 Hi = DAG.getNode(ISD::SRL, NVT, InH, DAG.getConstant(Cst, ShTy));
4464 Hi = Lo = DAG.getNode(ISD::SRA, NVT, InH,
4465 DAG.getConstant(NVTBits-1, ShTy));
4466 } else if (Cst > NVTBits) {
4467 Lo = DAG.getNode(ISD::SRA, NVT, InH,
4468 DAG.getConstant(Cst-NVTBits, ShTy));
4469 Hi = DAG.getNode(ISD::SRA, NVT, InH,
4470 DAG.getConstant(NVTBits-1, ShTy));
4471 } else if (Cst == NVTBits) {
4473 Hi = DAG.getNode(ISD::SRA, NVT, InH,
4474 DAG.getConstant(NVTBits-1, ShTy));
4476 Lo = DAG.getNode(ISD::OR, NVT,
4477 DAG.getNode(ISD::SRL, NVT, InL, DAG.getConstant(Cst, ShTy)),
4478 DAG.getNode(ISD::SHL, NVT, InH, DAG.getConstant(NVTBits-Cst, ShTy)));
4479 Hi = DAG.getNode(ISD::SRA, NVT, InH, DAG.getConstant(Cst, ShTy));
4485 // Okay, the shift amount isn't constant. However, if we can tell that it is
4486 // >= 32 or < 32, we can still simplify it, without knowing the actual value.
4487 uint64_t Mask = NVTBits, KnownZero, KnownOne;
4488 DAG.ComputeMaskedBits(Amt, Mask, KnownZero, KnownOne);
4490 // If we know that the high bit of the shift amount is one, then we can do
4491 // this as a couple of simple shifts.
4492 if (KnownOne & Mask) {
4493 // Mask out the high bit, which we know is set.
4494 Amt = DAG.getNode(ISD::AND, Amt.getValueType(), Amt,
4495 DAG.getConstant(NVTBits-1, Amt.getValueType()));
4497 // Expand the incoming operand to be shifted, so that we have its parts
4499 ExpandOp(Op, InL, InH);
4502 Lo = DAG.getConstant(0, NVT); // Low part is zero.
4503 Hi = DAG.getNode(ISD::SHL, NVT, InL, Amt); // High part from Lo part.
4506 Hi = DAG.getConstant(0, NVT); // Hi part is zero.
4507 Lo = DAG.getNode(ISD::SRL, NVT, InH, Amt); // Lo part from Hi part.
4510 Hi = DAG.getNode(ISD::SRA, NVT, InH, // Sign extend high part.
4511 DAG.getConstant(NVTBits-1, Amt.getValueType()));
4512 Lo = DAG.getNode(ISD::SRA, NVT, InH, Amt); // Lo part from Hi part.
4517 // If we know that the high bit of the shift amount is zero, then we can do
4518 // this as a couple of simple shifts.
4519 if (KnownZero & Mask) {
4521 SDOperand Amt2 = DAG.getNode(ISD::SUB, Amt.getValueType(),
4522 DAG.getConstant(NVTBits, Amt.getValueType()),
4525 // Expand the incoming operand to be shifted, so that we have its parts
4527 ExpandOp(Op, InL, InH);
4530 Lo = DAG.getNode(ISD::SHL, NVT, InL, Amt);
4531 Hi = DAG.getNode(ISD::OR, NVT,
4532 DAG.getNode(ISD::SHL, NVT, InH, Amt),
4533 DAG.getNode(ISD::SRL, NVT, InL, Amt2));
4536 Hi = DAG.getNode(ISD::SRL, NVT, InH, Amt);
4537 Lo = DAG.getNode(ISD::OR, NVT,
4538 DAG.getNode(ISD::SRL, NVT, InL, Amt),
4539 DAG.getNode(ISD::SHL, NVT, InH, Amt2));
4542 Hi = DAG.getNode(ISD::SRA, NVT, InH, Amt);
4543 Lo = DAG.getNode(ISD::OR, NVT,
4544 DAG.getNode(ISD::SRL, NVT, InL, Amt),
4545 DAG.getNode(ISD::SHL, NVT, InH, Amt2));
4554 // ExpandLibCall - Expand a node into a call to a libcall. If the result value
4555 // does not fit into a register, return the lo part and set the hi part to the
4556 // by-reg argument. If it does fit into a single register, return the result
4557 // and leave the Hi part unset.
4558 SDOperand SelectionDAGLegalize::ExpandLibCall(const char *Name, SDNode *Node,
4559 bool isSigned, SDOperand &Hi) {
4560 assert(!IsLegalizingCall && "Cannot overlap legalization of calls!");
4561 // The input chain to this libcall is the entry node of the function.
4562 // Legalizing the call will automatically add the previous call to the
4564 SDOperand InChain = DAG.getEntryNode();
4566 TargetLowering::ArgListTy Args;
4567 TargetLowering::ArgListEntry Entry;
4568 for (unsigned i = 0, e = Node->getNumOperands(); i != e; ++i) {
4569 MVT::ValueType ArgVT = Node->getOperand(i).getValueType();
4570 const Type *ArgTy = MVT::getTypeForValueType(ArgVT);
4571 Entry.Node = Node->getOperand(i); Entry.Ty = ArgTy;
4572 Entry.isSExt = isSigned;
4573 Args.push_back(Entry);
4575 SDOperand Callee = DAG.getExternalSymbol(Name, TLI.getPointerTy());
4577 // Splice the libcall in wherever FindInputOutputChains tells us to.
4578 const Type *RetTy = MVT::getTypeForValueType(Node->getValueType(0));
4579 std::pair<SDOperand,SDOperand> CallInfo =
4580 TLI.LowerCallTo(InChain, RetTy, isSigned, false, CallingConv::C, false,
4583 // Legalize the call sequence, starting with the chain. This will advance
4584 // the LastCALLSEQ_END to the legalized version of the CALLSEQ_END node that
4585 // was added by LowerCallTo (guaranteeing proper serialization of calls).
4586 LegalizeOp(CallInfo.second);
4588 switch (getTypeAction(CallInfo.first.getValueType())) {
4589 default: assert(0 && "Unknown thing");
4591 Result = CallInfo.first;
4594 ExpandOp(CallInfo.first, Result, Hi);
4601 /// ExpandIntToFP - Expand a [US]INT_TO_FP operation.
4603 SDOperand SelectionDAGLegalize::
4604 ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
4605 assert(getTypeAction(Source.getValueType()) == Expand &&
4606 "This is not an expansion!");
4607 assert(Source.getValueType() == MVT::i64 && "Only handle expand from i64!");
4610 assert(Source.getValueType() == MVT::i64 &&
4611 "This only works for 64-bit -> FP");
4612 // The 64-bit value loaded will be incorrectly if the 'sign bit' of the
4613 // incoming integer is set. To handle this, we dynamically test to see if
4614 // it is set, and, if so, add a fudge factor.
4616 ExpandOp(Source, Lo, Hi);
4618 // If this is unsigned, and not supported, first perform the conversion to
4619 // signed, then adjust the result if the sign bit is set.
4620 SDOperand SignedConv = ExpandIntToFP(true, DestTy,
4621 DAG.getNode(ISD::BUILD_PAIR, Source.getValueType(), Lo, Hi));
4623 SDOperand SignSet = DAG.getSetCC(TLI.getSetCCResultTy(), Hi,
4624 DAG.getConstant(0, Hi.getValueType()),
4626 SDOperand Zero = getIntPtrConstant(0), Four = getIntPtrConstant(4);
4627 SDOperand CstOffset = DAG.getNode(ISD::SELECT, Zero.getValueType(),
4628 SignSet, Four, Zero);
4629 uint64_t FF = 0x5f800000ULL;
4630 if (TLI.isLittleEndian()) FF <<= 32;
4631 static Constant *FudgeFactor = ConstantInt::get(Type::Int64Ty, FF);
4633 SDOperand CPIdx = DAG.getConstantPool(FudgeFactor, TLI.getPointerTy());
4634 CPIdx = DAG.getNode(ISD::ADD, TLI.getPointerTy(), CPIdx, CstOffset);
4635 SDOperand FudgeInReg;
4636 if (DestTy == MVT::f32)
4637 FudgeInReg = DAG.getLoad(MVT::f32, DAG.getEntryNode(), CPIdx, NULL, 0);
4638 else if (MVT::getSizeInBits(DestTy) > MVT::getSizeInBits(MVT::f32))
4639 // FIXME: Avoid the extend by construction the right constantpool?
4640 FudgeInReg = DAG.getExtLoad(ISD::EXTLOAD, DestTy, DAG.getEntryNode(),
4641 CPIdx, NULL, 0, MVT::f32);
4643 assert(0 && "Unexpected conversion");
4645 MVT::ValueType SCVT = SignedConv.getValueType();
4646 if (SCVT != DestTy) {
4647 // Destination type needs to be expanded as well. The FADD now we are
4648 // constructing will be expanded into a libcall.
4649 if (MVT::getSizeInBits(SCVT) != MVT::getSizeInBits(DestTy)) {
4650 assert(SCVT == MVT::i32 && DestTy == MVT::f64);
4651 SignedConv = DAG.getNode(ISD::BUILD_PAIR, MVT::i64,
4652 SignedConv, SignedConv.getValue(1));
4654 SignedConv = DAG.getNode(ISD::BIT_CONVERT, DestTy, SignedConv);
4656 return DAG.getNode(ISD::FADD, DestTy, SignedConv, FudgeInReg);
4659 // Check to see if the target has a custom way to lower this. If so, use it.
4660 switch (TLI.getOperationAction(ISD::SINT_TO_FP, Source.getValueType())) {
4661 default: assert(0 && "This action not implemented for this operation!");
4662 case TargetLowering::Legal:
4663 case TargetLowering::Expand:
4664 break; // This case is handled below.
4665 case TargetLowering::Custom: {
4666 SDOperand NV = TLI.LowerOperation(DAG.getNode(ISD::SINT_TO_FP, DestTy,
4669 return LegalizeOp(NV);
4670 break; // The target decided this was legal after all
4674 // Expand the source, then glue it back together for the call. We must expand
4675 // the source in case it is shared (this pass of legalize must traverse it).
4676 SDOperand SrcLo, SrcHi;
4677 ExpandOp(Source, SrcLo, SrcHi);
4678 Source = DAG.getNode(ISD::BUILD_PAIR, Source.getValueType(), SrcLo, SrcHi);
4681 if (DestTy == MVT::f32)
4682 LC = RTLIB::SINTTOFP_I64_F32;
4684 assert(DestTy == MVT::f64 && "Unknown fp value type!");
4685 LC = RTLIB::SINTTOFP_I64_F64;
4688 assert(TLI.getLibcallName(LC) && "Don't know how to expand this SINT_TO_FP!");
4689 Source = DAG.getNode(ISD::SINT_TO_FP, DestTy, Source);
4690 SDOperand UnusedHiPart;
4691 return ExpandLibCall(TLI.getLibcallName(LC), Source.Val, isSigned,
4695 /// ExpandLegalINT_TO_FP - This function is responsible for legalizing a
4696 /// INT_TO_FP operation of the specified operand when the target requests that
4697 /// we expand it. At this point, we know that the result and operand types are
4698 /// legal for the target.
4699 SDOperand SelectionDAGLegalize::ExpandLegalINT_TO_FP(bool isSigned,
4701 MVT::ValueType DestVT) {
4702 if (Op0.getValueType() == MVT::i32) {
4703 // simple 32-bit [signed|unsigned] integer to float/double expansion
4705 // get the stack frame index of a 8 byte buffer, pessimistically aligned
4706 MachineFunction &MF = DAG.getMachineFunction();
4707 const Type *F64Type = MVT::getTypeForValueType(MVT::f64);
4708 unsigned StackAlign =
4709 (unsigned)TLI.getTargetData()->getPrefTypeAlignment(F64Type);
4710 int SSFI = MF.getFrameInfo()->CreateStackObject(8, StackAlign);
4711 // get address of 8 byte buffer
4712 SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
4713 // word offset constant for Hi/Lo address computation
4714 SDOperand WordOff = DAG.getConstant(sizeof(int), TLI.getPointerTy());
4715 // set up Hi and Lo (into buffer) address based on endian
4716 SDOperand Hi = StackSlot;
4717 SDOperand Lo = DAG.getNode(ISD::ADD, TLI.getPointerTy(), StackSlot,WordOff);
4718 if (TLI.isLittleEndian())
4721 // if signed map to unsigned space
4722 SDOperand Op0Mapped;
4724 // constant used to invert sign bit (signed to unsigned mapping)
4725 SDOperand SignBit = DAG.getConstant(0x80000000u, MVT::i32);
4726 Op0Mapped = DAG.getNode(ISD::XOR, MVT::i32, Op0, SignBit);
4730 // store the lo of the constructed double - based on integer input
4731 SDOperand Store1 = DAG.getStore(DAG.getEntryNode(),
4732 Op0Mapped, Lo, NULL, 0);
4733 // initial hi portion of constructed double
4734 SDOperand InitialHi = DAG.getConstant(0x43300000u, MVT::i32);
4735 // store the hi of the constructed double - biased exponent
4736 SDOperand Store2=DAG.getStore(Store1, InitialHi, Hi, NULL, 0);
4737 // load the constructed double
4738 SDOperand Load = DAG.getLoad(MVT::f64, Store2, StackSlot, NULL, 0);
4739 // FP constant to bias correct the final result
4740 SDOperand Bias = DAG.getConstantFP(isSigned ?
4741 BitsToDouble(0x4330000080000000ULL)
4742 : BitsToDouble(0x4330000000000000ULL),
4744 // subtract the bias
4745 SDOperand Sub = DAG.getNode(ISD::FSUB, MVT::f64, Load, Bias);
4748 // handle final rounding
4749 if (DestVT == MVT::f64) {
4752 } else if (MVT::getSizeInBits(DestVT) < MVT::getSizeInBits(MVT::f64)) {
4753 Result = DAG.getNode(ISD::FP_ROUND, DestVT, Sub);
4754 } else if (MVT::getSizeInBits(DestVT) > MVT::getSizeInBits(MVT::f64)) {
4755 Result = DAG.getNode(ISD::FP_EXTEND, DestVT, Sub);
4759 assert(!isSigned && "Legalize cannot Expand SINT_TO_FP for i64 yet");
4760 SDOperand Tmp1 = DAG.getNode(ISD::SINT_TO_FP, DestVT, Op0);
4762 SDOperand SignSet = DAG.getSetCC(TLI.getSetCCResultTy(), Op0,
4763 DAG.getConstant(0, Op0.getValueType()),
4765 SDOperand Zero = getIntPtrConstant(0), Four = getIntPtrConstant(4);
4766 SDOperand CstOffset = DAG.getNode(ISD::SELECT, Zero.getValueType(),
4767 SignSet, Four, Zero);
4769 // If the sign bit of the integer is set, the large number will be treated
4770 // as a negative number. To counteract this, the dynamic code adds an
4771 // offset depending on the data type.
4773 switch (Op0.getValueType()) {
4774 default: assert(0 && "Unsupported integer type!");
4775 case MVT::i8 : FF = 0x43800000ULL; break; // 2^8 (as a float)
4776 case MVT::i16: FF = 0x47800000ULL; break; // 2^16 (as a float)
4777 case MVT::i32: FF = 0x4F800000ULL; break; // 2^32 (as a float)
4778 case MVT::i64: FF = 0x5F800000ULL; break; // 2^64 (as a float)
4780 if (TLI.isLittleEndian()) FF <<= 32;
4781 static Constant *FudgeFactor = ConstantInt::get(Type::Int64Ty, FF);
4783 SDOperand CPIdx = DAG.getConstantPool(FudgeFactor, TLI.getPointerTy());
4784 CPIdx = DAG.getNode(ISD::ADD, TLI.getPointerTy(), CPIdx, CstOffset);
4785 SDOperand FudgeInReg;
4786 if (DestVT == MVT::f32)
4787 FudgeInReg = DAG.getLoad(MVT::f32, DAG.getEntryNode(), CPIdx, NULL, 0);
4789 FudgeInReg = LegalizeOp(DAG.getExtLoad(ISD::EXTLOAD, DestVT,
4790 DAG.getEntryNode(), CPIdx,
4791 NULL, 0, MVT::f32));
4794 return DAG.getNode(ISD::FADD, DestVT, Tmp1, FudgeInReg);
4797 /// PromoteLegalINT_TO_FP - This function is responsible for legalizing a
4798 /// *INT_TO_FP operation of the specified operand when the target requests that
4799 /// we promote it. At this point, we know that the result and operand types are
4800 /// legal for the target, and that there is a legal UINT_TO_FP or SINT_TO_FP
4801 /// operation that takes a larger input.
4802 SDOperand SelectionDAGLegalize::PromoteLegalINT_TO_FP(SDOperand LegalOp,
4803 MVT::ValueType DestVT,
4805 // First step, figure out the appropriate *INT_TO_FP operation to use.
4806 MVT::ValueType NewInTy = LegalOp.getValueType();
4808 unsigned OpToUse = 0;
4810 // Scan for the appropriate larger type to use.
4812 NewInTy = (MVT::ValueType)(NewInTy+1);
4813 assert(MVT::isInteger(NewInTy) && "Ran out of possibilities!");
4815 // If the target supports SINT_TO_FP of this type, use it.
4816 switch (TLI.getOperationAction(ISD::SINT_TO_FP, NewInTy)) {
4818 case TargetLowering::Legal:
4819 if (!TLI.isTypeLegal(NewInTy))
4820 break; // Can't use this datatype.
4822 case TargetLowering::Custom:
4823 OpToUse = ISD::SINT_TO_FP;
4827 if (isSigned) continue;
4829 // If the target supports UINT_TO_FP of this type, use it.
4830 switch (TLI.getOperationAction(ISD::UINT_TO_FP, NewInTy)) {
4832 case TargetLowering::Legal:
4833 if (!TLI.isTypeLegal(NewInTy))
4834 break; // Can't use this datatype.
4836 case TargetLowering::Custom:
4837 OpToUse = ISD::UINT_TO_FP;
4842 // Otherwise, try a larger type.
4845 // Okay, we found the operation and type to use. Zero extend our input to the
4846 // desired type then run the operation on it.
4847 return DAG.getNode(OpToUse, DestVT,
4848 DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
4852 /// PromoteLegalFP_TO_INT - This function is responsible for legalizing a
4853 /// FP_TO_*INT operation of the specified operand when the target requests that
4854 /// we promote it. At this point, we know that the result and operand types are
4855 /// legal for the target, and that there is a legal FP_TO_UINT or FP_TO_SINT
4856 /// operation that returns a larger result.
4857 SDOperand SelectionDAGLegalize::PromoteLegalFP_TO_INT(SDOperand LegalOp,
4858 MVT::ValueType DestVT,
4860 // First step, figure out the appropriate FP_TO*INT operation to use.
4861 MVT::ValueType NewOutTy = DestVT;
4863 unsigned OpToUse = 0;
4865 // Scan for the appropriate larger type to use.
4867 NewOutTy = (MVT::ValueType)(NewOutTy+1);
4868 assert(MVT::isInteger(NewOutTy) && "Ran out of possibilities!");
4870 // If the target supports FP_TO_SINT returning this type, use it.
4871 switch (TLI.getOperationAction(ISD::FP_TO_SINT, NewOutTy)) {
4873 case TargetLowering::Legal:
4874 if (!TLI.isTypeLegal(NewOutTy))
4875 break; // Can't use this datatype.
4877 case TargetLowering::Custom:
4878 OpToUse = ISD::FP_TO_SINT;
4883 // If the target supports FP_TO_UINT of this type, use it.
4884 switch (TLI.getOperationAction(ISD::FP_TO_UINT, NewOutTy)) {
4886 case TargetLowering::Legal:
4887 if (!TLI.isTypeLegal(NewOutTy))
4888 break; // Can't use this datatype.
4890 case TargetLowering::Custom:
4891 OpToUse = ISD::FP_TO_UINT;
4896 // Otherwise, try a larger type.
4899 // Okay, we found the operation and type to use. Truncate the result of the
4900 // extended FP_TO_*INT operation to the desired size.
4901 return DAG.getNode(ISD::TRUNCATE, DestVT,
4902 DAG.getNode(OpToUse, NewOutTy, LegalOp));
4905 /// ExpandBSWAP - Open code the operations for BSWAP of the specified operation.
4907 SDOperand SelectionDAGLegalize::ExpandBSWAP(SDOperand Op) {
4908 MVT::ValueType VT = Op.getValueType();
4909 MVT::ValueType SHVT = TLI.getShiftAmountTy();
4910 SDOperand Tmp1, Tmp2, Tmp3, Tmp4, Tmp5, Tmp6, Tmp7, Tmp8;
4912 default: assert(0 && "Unhandled Expand type in BSWAP!"); abort();
4914 Tmp2 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(8, SHVT));
4915 Tmp1 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(8, SHVT));
4916 return DAG.getNode(ISD::OR, VT, Tmp1, Tmp2);
4918 Tmp4 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(24, SHVT));
4919 Tmp3 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(8, SHVT));
4920 Tmp2 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(8, SHVT));
4921 Tmp1 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(24, SHVT));
4922 Tmp3 = DAG.getNode(ISD::AND, VT, Tmp3, DAG.getConstant(0xFF0000, VT));
4923 Tmp2 = DAG.getNode(ISD::AND, VT, Tmp2, DAG.getConstant(0xFF00, VT));
4924 Tmp4 = DAG.getNode(ISD::OR, VT, Tmp4, Tmp3);
4925 Tmp2 = DAG.getNode(ISD::OR, VT, Tmp2, Tmp1);
4926 return DAG.getNode(ISD::OR, VT, Tmp4, Tmp2);
4928 Tmp8 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(56, SHVT));
4929 Tmp7 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(40, SHVT));
4930 Tmp6 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(24, SHVT));
4931 Tmp5 = DAG.getNode(ISD::SHL, VT, Op, DAG.getConstant(8, SHVT));
4932 Tmp4 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(8, SHVT));
4933 Tmp3 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(24, SHVT));
4934 Tmp2 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(40, SHVT));
4935 Tmp1 = DAG.getNode(ISD::SRL, VT, Op, DAG.getConstant(56, SHVT));
4936 Tmp7 = DAG.getNode(ISD::AND, VT, Tmp7, DAG.getConstant(255ULL<<48, VT));
4937 Tmp6 = DAG.getNode(ISD::AND, VT, Tmp6, DAG.getConstant(255ULL<<40, VT));
4938 Tmp5 = DAG.getNode(ISD::AND, VT, Tmp5, DAG.getConstant(255ULL<<32, VT));
4939 Tmp4 = DAG.getNode(ISD::AND, VT, Tmp4, DAG.getConstant(255ULL<<24, VT));
4940 Tmp3 = DAG.getNode(ISD::AND, VT, Tmp3, DAG.getConstant(255ULL<<16, VT));
4941 Tmp2 = DAG.getNode(ISD::AND, VT, Tmp2, DAG.getConstant(255ULL<<8 , VT));
4942 Tmp8 = DAG.getNode(ISD::OR, VT, Tmp8, Tmp7);
4943 Tmp6 = DAG.getNode(ISD::OR, VT, Tmp6, Tmp5);
4944 Tmp4 = DAG.getNode(ISD::OR, VT, Tmp4, Tmp3);
4945 Tmp2 = DAG.getNode(ISD::OR, VT, Tmp2, Tmp1);
4946 Tmp8 = DAG.getNode(ISD::OR, VT, Tmp8, Tmp6);
4947 Tmp4 = DAG.getNode(ISD::OR, VT, Tmp4, Tmp2);
4948 return DAG.getNode(ISD::OR, VT, Tmp8, Tmp4);
4952 /// ExpandBitCount - Expand the specified bitcount instruction into operations.
4954 SDOperand SelectionDAGLegalize::ExpandBitCount(unsigned Opc, SDOperand Op) {
4956 default: assert(0 && "Cannot expand this yet!");
4958 static const uint64_t mask[6] = {
4959 0x5555555555555555ULL, 0x3333333333333333ULL,
4960 0x0F0F0F0F0F0F0F0FULL, 0x00FF00FF00FF00FFULL,
4961 0x0000FFFF0000FFFFULL, 0x00000000FFFFFFFFULL
4963 MVT::ValueType VT = Op.getValueType();
4964 MVT::ValueType ShVT = TLI.getShiftAmountTy();
4965 unsigned len = MVT::getSizeInBits(VT);
4966 for (unsigned i = 0; (1U << i) <= (len / 2); ++i) {
4967 //x = (x & mask[i][len/8]) + (x >> (1 << i) & mask[i][len/8])
4968 SDOperand Tmp2 = DAG.getConstant(mask[i], VT);
4969 SDOperand Tmp3 = DAG.getConstant(1ULL << i, ShVT);
4970 Op = DAG.getNode(ISD::ADD, VT, DAG.getNode(ISD::AND, VT, Op, Tmp2),
4971 DAG.getNode(ISD::AND, VT,
4972 DAG.getNode(ISD::SRL, VT, Op, Tmp3),Tmp2));
4977 // for now, we do this:
4978 // x = x | (x >> 1);
4979 // x = x | (x >> 2);
4981 // x = x | (x >>16);
4982 // x = x | (x >>32); // for 64-bit input
4983 // return popcount(~x);
4985 // but see also: http://www.hackersdelight.org/HDcode/nlz.cc
4986 MVT::ValueType VT = Op.getValueType();
4987 MVT::ValueType ShVT = TLI.getShiftAmountTy();
4988 unsigned len = MVT::getSizeInBits(VT);
4989 for (unsigned i = 0; (1U << i) <= (len / 2); ++i) {
4990 SDOperand Tmp3 = DAG.getConstant(1ULL << i, ShVT);
4991 Op = DAG.getNode(ISD::OR, VT, Op, DAG.getNode(ISD::SRL, VT, Op, Tmp3));
4993 Op = DAG.getNode(ISD::XOR, VT, Op, DAG.getConstant(~0ULL, VT));
4994 return DAG.getNode(ISD::CTPOP, VT, Op);
4997 // for now, we use: { return popcount(~x & (x - 1)); }
4998 // unless the target has ctlz but not ctpop, in which case we use:
4999 // { return 32 - nlz(~x & (x-1)); }
5000 // see also http://www.hackersdelight.org/HDcode/ntz.cc
5001 MVT::ValueType VT = Op.getValueType();
5002 SDOperand Tmp2 = DAG.getConstant(~0ULL, VT);
5003 SDOperand Tmp3 = DAG.getNode(ISD::AND, VT,
5004 DAG.getNode(ISD::XOR, VT, Op, Tmp2),
5005 DAG.getNode(ISD::SUB, VT, Op, DAG.getConstant(1, VT)));
5006 // If ISD::CTLZ is legal and CTPOP isn't, then do that instead.
5007 if (!TLI.isOperationLegal(ISD::CTPOP, VT) &&
5008 TLI.isOperationLegal(ISD::CTLZ, VT))
5009 return DAG.getNode(ISD::SUB, VT,
5010 DAG.getConstant(MVT::getSizeInBits(VT), VT),
5011 DAG.getNode(ISD::CTLZ, VT, Tmp3));
5012 return DAG.getNode(ISD::CTPOP, VT, Tmp3);
5017 /// ExpandOp - Expand the specified SDOperand into its two component pieces
5018 /// Lo&Hi. Note that the Op MUST be an expanded type. As a result of this, the
5019 /// LegalizeNodes map is filled in for any results that are not expanded, the
5020 /// ExpandedNodes map is filled in for any results that are expanded, and the
5021 /// Lo/Hi values are returned.
5022 void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
5023 MVT::ValueType VT = Op.getValueType();
5024 MVT::ValueType NVT = TLI.getTypeToTransformTo(VT);
5025 SDNode *Node = Op.Val;
5026 assert(getTypeAction(VT) == Expand && "Not an expanded type!");
5027 assert(((MVT::isInteger(NVT) && NVT < VT) || MVT::isFloatingPoint(VT) ||
5028 MVT::isVector(VT)) &&
5029 "Cannot expand to FP value or to larger int value!");
5031 // See if we already expanded it.
5032 DenseMap<SDOperand, std::pair<SDOperand, SDOperand> >::iterator I
5033 = ExpandedNodes.find(Op);
5034 if (I != ExpandedNodes.end()) {
5035 Lo = I->second.first;
5036 Hi = I->second.second;
5040 switch (Node->getOpcode()) {
5041 case ISD::CopyFromReg:
5042 assert(0 && "CopyFromReg must be legal!");
5045 cerr << "NODE: "; Node->dump(&DAG); cerr << "\n";
5047 assert(0 && "Do not know how to expand this operator!");
5050 NVT = TLI.getTypeToExpandTo(VT);
5051 Lo = DAG.getNode(ISD::UNDEF, NVT);
5052 Hi = DAG.getNode(ISD::UNDEF, NVT);
5054 case ISD::Constant: {
5055 uint64_t Cst = cast<ConstantSDNode>(Node)->getValue();
5056 Lo = DAG.getConstant(Cst, NVT);
5057 Hi = DAG.getConstant(Cst >> MVT::getSizeInBits(NVT), NVT);
5060 case ISD::ConstantFP: {
5061 ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Node);
5062 Lo = ExpandConstantFP(CFP, false, DAG, TLI);
5063 if (getTypeAction(Lo.getValueType()) == Expand)
5064 ExpandOp(Lo, Lo, Hi);
5067 case ISD::BUILD_PAIR:
5068 // Return the operands.
5069 Lo = Node->getOperand(0);
5070 Hi = Node->getOperand(1);
5073 case ISD::SIGN_EXTEND_INREG:
5074 ExpandOp(Node->getOperand(0), Lo, Hi);
5075 // sext_inreg the low part if needed.
5076 Lo = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Lo, Node->getOperand(1));
5078 // The high part gets the sign extension from the lo-part. This handles
5079 // things like sextinreg V:i64 from i8.
5080 Hi = DAG.getNode(ISD::SRA, NVT, Lo,
5081 DAG.getConstant(MVT::getSizeInBits(NVT)-1,
5082 TLI.getShiftAmountTy()));
5086 ExpandOp(Node->getOperand(0), Lo, Hi);
5087 SDOperand TempLo = DAG.getNode(ISD::BSWAP, NVT, Hi);
5088 Hi = DAG.getNode(ISD::BSWAP, NVT, Lo);
5094 ExpandOp(Node->getOperand(0), Lo, Hi);
5095 Lo = DAG.getNode(ISD::ADD, NVT, // ctpop(HL) -> ctpop(H)+ctpop(L)
5096 DAG.getNode(ISD::CTPOP, NVT, Lo),
5097 DAG.getNode(ISD::CTPOP, NVT, Hi));
5098 Hi = DAG.getConstant(0, NVT);
5102 // ctlz (HL) -> ctlz(H) != 32 ? ctlz(H) : (ctlz(L)+32)
5103 ExpandOp(Node->getOperand(0), Lo, Hi);
5104 SDOperand BitsC = DAG.getConstant(MVT::getSizeInBits(NVT), NVT);
5105 SDOperand HLZ = DAG.getNode(ISD::CTLZ, NVT, Hi);
5106 SDOperand TopNotZero = DAG.getSetCC(TLI.getSetCCResultTy(), HLZ, BitsC,
5108 SDOperand LowPart = DAG.getNode(ISD::CTLZ, NVT, Lo);
5109 LowPart = DAG.getNode(ISD::ADD, NVT, LowPart, BitsC);
5111 Lo = DAG.getNode(ISD::SELECT, NVT, TopNotZero, HLZ, LowPart);
5112 Hi = DAG.getConstant(0, NVT);
5117 // cttz (HL) -> cttz(L) != 32 ? cttz(L) : (cttz(H)+32)
5118 ExpandOp(Node->getOperand(0), Lo, Hi);
5119 SDOperand BitsC = DAG.getConstant(MVT::getSizeInBits(NVT), NVT);
5120 SDOperand LTZ = DAG.getNode(ISD::CTTZ, NVT, Lo);
5121 SDOperand BotNotZero = DAG.getSetCC(TLI.getSetCCResultTy(), LTZ, BitsC,
5123 SDOperand HiPart = DAG.getNode(ISD::CTTZ, NVT, Hi);
5124 HiPart = DAG.getNode(ISD::ADD, NVT, HiPart, BitsC);
5126 Lo = DAG.getNode(ISD::SELECT, NVT, BotNotZero, LTZ, HiPart);
5127 Hi = DAG.getConstant(0, NVT);
5132 SDOperand Ch = Node->getOperand(0); // Legalize the chain.
5133 SDOperand Ptr = Node->getOperand(1); // Legalize the pointer.
5134 Lo = DAG.getVAArg(NVT, Ch, Ptr, Node->getOperand(2));
5135 Hi = DAG.getVAArg(NVT, Lo.getValue(1), Ptr, Node->getOperand(2));
5137 // Remember that we legalized the chain.
5138 Hi = LegalizeOp(Hi);
5139 AddLegalizedOperand(Op.getValue(1), Hi.getValue(1));
5140 if (!TLI.isLittleEndian())
5146 LoadSDNode *LD = cast<LoadSDNode>(Node);
5147 SDOperand Ch = LD->getChain(); // Legalize the chain.
5148 SDOperand Ptr = LD->getBasePtr(); // Legalize the pointer.
5149 ISD::LoadExtType ExtType = LD->getExtensionType();
5150 int SVOffset = LD->getSrcValueOffset();
5151 unsigned Alignment = LD->getAlignment();
5152 bool isVolatile = LD->isVolatile();
5154 if (ExtType == ISD::NON_EXTLOAD) {
5155 Lo = DAG.getLoad(NVT, Ch, Ptr, LD->getSrcValue(), SVOffset,
5156 isVolatile, Alignment);
5157 if (VT == MVT::f32 || VT == MVT::f64) {
5158 // f32->i32 or f64->i64 one to one expansion.
5159 // Remember that we legalized the chain.
5160 AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Lo.getValue(1)));
5161 // Recursively expand the new load.
5162 if (getTypeAction(NVT) == Expand)
5163 ExpandOp(Lo, Lo, Hi);
5167 // Increment the pointer to the other half.
5168 unsigned IncrementSize = MVT::getSizeInBits(Lo.getValueType())/8;
5169 Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
5170 getIntPtrConstant(IncrementSize));
5171 SVOffset += IncrementSize;
5172 if (Alignment > IncrementSize)
5173 Alignment = IncrementSize;
5174 Hi = DAG.getLoad(NVT, Ch, Ptr, LD->getSrcValue(), SVOffset,
5175 isVolatile, Alignment);
5177 // Build a factor node to remember that this load is independent of the
5179 SDOperand TF = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo.getValue(1),
5182 // Remember that we legalized the chain.
5183 AddLegalizedOperand(Op.getValue(1), LegalizeOp(TF));
5184 if (!TLI.isLittleEndian())
5187 MVT::ValueType EVT = LD->getLoadedVT();
5189 if (VT == MVT::f64 && EVT == MVT::f32) {
5190 // f64 = EXTLOAD f32 should expand to LOAD, FP_EXTEND
5191 SDOperand Load = DAG.getLoad(EVT, Ch, Ptr, LD->getSrcValue(),
5192 SVOffset, isVolatile, Alignment);
5193 // Remember that we legalized the chain.
5194 AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Load.getValue(1)));
5195 ExpandOp(DAG.getNode(ISD::FP_EXTEND, VT, Load), Lo, Hi);
5200 Lo = DAG.getLoad(NVT, Ch, Ptr, LD->getSrcValue(),
5201 SVOffset, isVolatile, Alignment);
5203 Lo = DAG.getExtLoad(ExtType, NVT, Ch, Ptr, LD->getSrcValue(),
5204 SVOffset, EVT, isVolatile,
5207 // Remember that we legalized the chain.
5208 AddLegalizedOperand(SDOperand(Node, 1), LegalizeOp(Lo.getValue(1)));
5210 if (ExtType == ISD::SEXTLOAD) {
5211 // The high part is obtained by SRA'ing all but one of the bits of the
5213 unsigned LoSize = MVT::getSizeInBits(Lo.getValueType());
5214 Hi = DAG.getNode(ISD::SRA, NVT, Lo,
5215 DAG.getConstant(LoSize-1, TLI.getShiftAmountTy()));
5216 } else if (ExtType == ISD::ZEXTLOAD) {
5217 // The high part is just a zero.
5218 Hi = DAG.getConstant(0, NVT);
5219 } else /* if (ExtType == ISD::EXTLOAD) */ {
5220 // The high part is undefined.
5221 Hi = DAG.getNode(ISD::UNDEF, NVT);
5228 case ISD::XOR: { // Simple logical operators -> two trivial pieces.
5229 SDOperand LL, LH, RL, RH;
5230 ExpandOp(Node->getOperand(0), LL, LH);
5231 ExpandOp(Node->getOperand(1), RL, RH);
5232 Lo = DAG.getNode(Node->getOpcode(), NVT, LL, RL);
5233 Hi = DAG.getNode(Node->getOpcode(), NVT, LH, RH);
5237 SDOperand LL, LH, RL, RH;
5238 ExpandOp(Node->getOperand(1), LL, LH);
5239 ExpandOp(Node->getOperand(2), RL, RH);
5240 if (getTypeAction(NVT) == Expand)
5241 NVT = TLI.getTypeToExpandTo(NVT);
5242 Lo = DAG.getNode(ISD::SELECT, NVT, Node->getOperand(0), LL, RL);
5244 Hi = DAG.getNode(ISD::SELECT, NVT, Node->getOperand(0), LH, RH);
5247 case ISD::SELECT_CC: {
5248 SDOperand TL, TH, FL, FH;
5249 ExpandOp(Node->getOperand(2), TL, TH);
5250 ExpandOp(Node->getOperand(3), FL, FH);
5251 if (getTypeAction(NVT) == Expand)
5252 NVT = TLI.getTypeToExpandTo(NVT);
5253 Lo = DAG.getNode(ISD::SELECT_CC, NVT, Node->getOperand(0),
5254 Node->getOperand(1), TL, FL, Node->getOperand(4));
5256 Hi = DAG.getNode(ISD::SELECT_CC, NVT, Node->getOperand(0),
5257 Node->getOperand(1), TH, FH, Node->getOperand(4));
5260 case ISD::ANY_EXTEND:
5261 // The low part is any extension of the input (which degenerates to a copy).
5262 Lo = DAG.getNode(ISD::ANY_EXTEND, NVT, Node->getOperand(0));
5263 // The high part is undefined.
5264 Hi = DAG.getNode(ISD::UNDEF, NVT);
5266 case ISD::SIGN_EXTEND: {
5267 // The low part is just a sign extension of the input (which degenerates to
5269 Lo = DAG.getNode(ISD::SIGN_EXTEND, NVT, Node->getOperand(0));
5271 // The high part is obtained by SRA'ing all but one of the bits of the lo
5273 unsigned LoSize = MVT::getSizeInBits(Lo.getValueType());
5274 Hi = DAG.getNode(ISD::SRA, NVT, Lo,
5275 DAG.getConstant(LoSize-1, TLI.getShiftAmountTy()));
5278 case ISD::ZERO_EXTEND:
5279 // The low part is just a zero extension of the input (which degenerates to
5281 Lo = DAG.getNode(ISD::ZERO_EXTEND, NVT, Node->getOperand(0));
5283 // The high part is just a zero.
5284 Hi = DAG.getConstant(0, NVT);
5287 case ISD::TRUNCATE: {
5288 // The input value must be larger than this value. Expand *it*.
5290 ExpandOp(Node->getOperand(0), NewLo, Hi);
5292 // The low part is now either the right size, or it is closer. If not the
5293 // right size, make an illegal truncate so we recursively expand it.
5294 if (NewLo.getValueType() != Node->getValueType(0))
5295 NewLo = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), NewLo);
5296 ExpandOp(NewLo, Lo, Hi);
5300 case ISD::BIT_CONVERT: {
5302 if (TLI.getOperationAction(ISD::BIT_CONVERT, VT) == TargetLowering::Custom){
5303 // If the target wants to, allow it to lower this itself.
5304 switch (getTypeAction(Node->getOperand(0).getValueType())) {
5305 case Expand: assert(0 && "cannot expand FP!");
5306 case Legal: Tmp = LegalizeOp(Node->getOperand(0)); break;
5307 case Promote: Tmp = PromoteOp (Node->getOperand(0)); break;
5309 Tmp = TLI.LowerOperation(DAG.getNode(ISD::BIT_CONVERT, VT, Tmp), DAG);
5312 // f32 / f64 must be expanded to i32 / i64.
5313 if (VT == MVT::f32 || VT == MVT::f64) {
5314 Lo = DAG.getNode(ISD::BIT_CONVERT, NVT, Node->getOperand(0));
5315 if (getTypeAction(NVT) == Expand)
5316 ExpandOp(Lo, Lo, Hi);
5320 // If source operand will be expanded to the same type as VT, i.e.
5321 // i64 <- f64, i32 <- f32, expand the source operand instead.
5322 MVT::ValueType VT0 = Node->getOperand(0).getValueType();
5323 if (getTypeAction(VT0) == Expand && TLI.getTypeToTransformTo(VT0) == VT) {
5324 ExpandOp(Node->getOperand(0), Lo, Hi);
5328 // Turn this into a load/store pair by default.
5330 Tmp = ExpandBIT_CONVERT(VT, Node->getOperand(0));
5332 ExpandOp(Tmp, Lo, Hi);
5336 case ISD::READCYCLECOUNTER:
5337 assert(TLI.getOperationAction(ISD::READCYCLECOUNTER, VT) ==
5338 TargetLowering::Custom &&
5339 "Must custom expand ReadCycleCounter");
5340 Lo = TLI.LowerOperation(Op, DAG);
5341 assert(Lo.Val && "Node must be custom expanded!");
5342 Hi = Lo.getValue(1);
5343 AddLegalizedOperand(SDOperand(Node, 1), // Remember we legalized the chain.
5344 LegalizeOp(Lo.getValue(2)));
5347 // These operators cannot be expanded directly, emit them as calls to
5348 // library functions.
5349 case ISD::FP_TO_SINT: {
5350 if (TLI.getOperationAction(ISD::FP_TO_SINT, VT) == TargetLowering::Custom) {
5352 switch (getTypeAction(Node->getOperand(0).getValueType())) {
5353 case Expand: assert(0 && "cannot expand FP!");
5354 case Legal: Op = LegalizeOp(Node->getOperand(0)); break;
5355 case Promote: Op = PromoteOp (Node->getOperand(0)); break;
5358 Op = TLI.LowerOperation(DAG.getNode(ISD::FP_TO_SINT, VT, Op), DAG);
5360 // Now that the custom expander is done, expand the result, which is still
5363 ExpandOp(Op, Lo, Hi);
5369 if (Node->getOperand(0).getValueType() == MVT::f32)
5370 LC = RTLIB::FPTOSINT_F32_I64;
5371 else if (Node->getOperand(0).getValueType() == MVT::f64)
5372 LC = RTLIB::FPTOSINT_F64_I64;
5374 LC = RTLIB::FPTOSINT_LD_I64;
5375 Lo = ExpandLibCall(TLI.getLibcallName(LC), Node,
5376 false/*sign irrelevant*/, Hi);
5380 case ISD::FP_TO_UINT: {
5381 if (TLI.getOperationAction(ISD::FP_TO_UINT, VT) == TargetLowering::Custom) {
5383 switch (getTypeAction(Node->getOperand(0).getValueType())) {
5384 case Expand: assert(0 && "cannot expand FP!");
5385 case Legal: Op = LegalizeOp(Node->getOperand(0)); break;
5386 case Promote: Op = PromoteOp (Node->getOperand(0)); break;
5389 Op = TLI.LowerOperation(DAG.getNode(ISD::FP_TO_UINT, VT, Op), DAG);
5391 // Now that the custom expander is done, expand the result.
5393 ExpandOp(Op, Lo, Hi);
5399 if (Node->getOperand(0).getValueType() == MVT::f32)
5400 LC = RTLIB::FPTOUINT_F32_I64;
5402 LC = RTLIB::FPTOUINT_F64_I64;
5403 Lo = ExpandLibCall(TLI.getLibcallName(LC), Node,
5404 false/*sign irrelevant*/, Hi);
5409 // If the target wants custom lowering, do so.
5410 SDOperand ShiftAmt = LegalizeOp(Node->getOperand(1));
5411 if (TLI.getOperationAction(ISD::SHL, VT) == TargetLowering::Custom) {
5412 SDOperand Op = DAG.getNode(ISD::SHL, VT, Node->getOperand(0), ShiftAmt);
5413 Op = TLI.LowerOperation(Op, DAG);
5415 // Now that the custom expander is done, expand the result, which is
5417 ExpandOp(Op, Lo, Hi);
5422 // If ADDC/ADDE are supported and if the shift amount is a constant 1, emit
5423 // this X << 1 as X+X.
5424 if (ConstantSDNode *ShAmt = dyn_cast<ConstantSDNode>(ShiftAmt)) {
5425 if (ShAmt->getValue() == 1 && TLI.isOperationLegal(ISD::ADDC, NVT) &&
5426 TLI.isOperationLegal(ISD::ADDE, NVT)) {
5427 SDOperand LoOps[2], HiOps[3];
5428 ExpandOp(Node->getOperand(0), LoOps[0], HiOps[0]);
5429 SDVTList VTList = DAG.getVTList(LoOps[0].getValueType(), MVT::Flag);
5430 LoOps[1] = LoOps[0];
5431 Lo = DAG.getNode(ISD::ADDC, VTList, LoOps, 2);
5433 HiOps[1] = HiOps[0];
5434 HiOps[2] = Lo.getValue(1);
5435 Hi = DAG.getNode(ISD::ADDE, VTList, HiOps, 3);
5440 // If we can emit an efficient shift operation, do so now.
5441 if (ExpandShift(ISD::SHL, Node->getOperand(0), ShiftAmt, Lo, Hi))
5444 // If this target supports SHL_PARTS, use it.
5445 TargetLowering::LegalizeAction Action =
5446 TLI.getOperationAction(ISD::SHL_PARTS, NVT);
5447 if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
5448 Action == TargetLowering::Custom) {
5449 ExpandShiftParts(ISD::SHL_PARTS, Node->getOperand(0), ShiftAmt, Lo, Hi);
5453 // Otherwise, emit a libcall.
5454 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::SHL_I64), Node,
5455 false/*left shift=unsigned*/, Hi);
5460 // If the target wants custom lowering, do so.
5461 SDOperand ShiftAmt = LegalizeOp(Node->getOperand(1));
5462 if (TLI.getOperationAction(ISD::SRA, VT) == TargetLowering::Custom) {
5463 SDOperand Op = DAG.getNode(ISD::SRA, VT, Node->getOperand(0), ShiftAmt);
5464 Op = TLI.LowerOperation(Op, DAG);
5466 // Now that the custom expander is done, expand the result, which is
5468 ExpandOp(Op, Lo, Hi);
5473 // If we can emit an efficient shift operation, do so now.
5474 if (ExpandShift(ISD::SRA, Node->getOperand(0), ShiftAmt, Lo, Hi))
5477 // If this target supports SRA_PARTS, use it.
5478 TargetLowering::LegalizeAction Action =
5479 TLI.getOperationAction(ISD::SRA_PARTS, NVT);
5480 if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
5481 Action == TargetLowering::Custom) {
5482 ExpandShiftParts(ISD::SRA_PARTS, Node->getOperand(0), ShiftAmt, Lo, Hi);
5486 // Otherwise, emit a libcall.
5487 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::SRA_I64), Node,
5488 true/*ashr is signed*/, Hi);
5493 // If the target wants custom lowering, do so.
5494 SDOperand ShiftAmt = LegalizeOp(Node->getOperand(1));
5495 if (TLI.getOperationAction(ISD::SRL, VT) == TargetLowering::Custom) {
5496 SDOperand Op = DAG.getNode(ISD::SRL, VT, Node->getOperand(0), ShiftAmt);
5497 Op = TLI.LowerOperation(Op, DAG);
5499 // Now that the custom expander is done, expand the result, which is
5501 ExpandOp(Op, Lo, Hi);
5506 // If we can emit an efficient shift operation, do so now.
5507 if (ExpandShift(ISD::SRL, Node->getOperand(0), ShiftAmt, Lo, Hi))
5510 // If this target supports SRL_PARTS, use it.
5511 TargetLowering::LegalizeAction Action =
5512 TLI.getOperationAction(ISD::SRL_PARTS, NVT);
5513 if ((Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
5514 Action == TargetLowering::Custom) {
5515 ExpandShiftParts(ISD::SRL_PARTS, Node->getOperand(0), ShiftAmt, Lo, Hi);
5519 // Otherwise, emit a libcall.
5520 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::SRL_I64), Node,
5521 false/*lshr is unsigned*/, Hi);
5527 // If the target wants to custom expand this, let them.
5528 if (TLI.getOperationAction(Node->getOpcode(), VT) ==
5529 TargetLowering::Custom) {
5530 Op = TLI.LowerOperation(Op, DAG);
5532 ExpandOp(Op, Lo, Hi);
5537 // Expand the subcomponents.
5538 SDOperand LHSL, LHSH, RHSL, RHSH;
5539 ExpandOp(Node->getOperand(0), LHSL, LHSH);
5540 ExpandOp(Node->getOperand(1), RHSL, RHSH);
5541 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
5542 SDOperand LoOps[2], HiOps[3];
5547 if (Node->getOpcode() == ISD::ADD) {
5548 Lo = DAG.getNode(ISD::ADDC, VTList, LoOps, 2);
5549 HiOps[2] = Lo.getValue(1);
5550 Hi = DAG.getNode(ISD::ADDE, VTList, HiOps, 3);
5552 Lo = DAG.getNode(ISD::SUBC, VTList, LoOps, 2);
5553 HiOps[2] = Lo.getValue(1);
5554 Hi = DAG.getNode(ISD::SUBE, VTList, HiOps, 3);
5561 // Expand the subcomponents.
5562 SDOperand LHSL, LHSH, RHSL, RHSH;
5563 ExpandOp(Node->getOperand(0), LHSL, LHSH);
5564 ExpandOp(Node->getOperand(1), RHSL, RHSH);
5565 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
5566 SDOperand LoOps[2] = { LHSL, RHSL };
5567 SDOperand HiOps[3] = { LHSH, RHSH };
5569 if (Node->getOpcode() == ISD::ADDC) {
5570 Lo = DAG.getNode(ISD::ADDC, VTList, LoOps, 2);
5571 HiOps[2] = Lo.getValue(1);
5572 Hi = DAG.getNode(ISD::ADDE, VTList, HiOps, 3);
5574 Lo = DAG.getNode(ISD::SUBC, VTList, LoOps, 2);
5575 HiOps[2] = Lo.getValue(1);
5576 Hi = DAG.getNode(ISD::SUBE, VTList, HiOps, 3);
5578 // Remember that we legalized the flag.
5579 AddLegalizedOperand(Op.getValue(1), LegalizeOp(Hi.getValue(1)));
5584 // Expand the subcomponents.
5585 SDOperand LHSL, LHSH, RHSL, RHSH;
5586 ExpandOp(Node->getOperand(0), LHSL, LHSH);
5587 ExpandOp(Node->getOperand(1), RHSL, RHSH);
5588 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
5589 SDOperand LoOps[3] = { LHSL, RHSL, Node->getOperand(2) };
5590 SDOperand HiOps[3] = { LHSH, RHSH };
5592 Lo = DAG.getNode(Node->getOpcode(), VTList, LoOps, 3);
5593 HiOps[2] = Lo.getValue(1);
5594 Hi = DAG.getNode(Node->getOpcode(), VTList, HiOps, 3);
5596 // Remember that we legalized the flag.
5597 AddLegalizedOperand(Op.getValue(1), LegalizeOp(Hi.getValue(1)));
5601 // If the target wants to custom expand this, let them.
5602 if (TLI.getOperationAction(ISD::MUL, VT) == TargetLowering::Custom) {
5603 SDOperand New = TLI.LowerOperation(Op, DAG);
5605 ExpandOp(New, Lo, Hi);
5610 bool HasMULHS = TLI.isOperationLegal(ISD::MULHS, NVT);
5611 bool HasMULHU = TLI.isOperationLegal(ISD::MULHU, NVT);
5612 if (HasMULHS || HasMULHU) {
5613 SDOperand LL, LH, RL, RH;
5614 ExpandOp(Node->getOperand(0), LL, LH);
5615 ExpandOp(Node->getOperand(1), RL, RH);
5616 unsigned SH = MVT::getSizeInBits(RH.getValueType())-1;
5617 // FIXME: Move this to the dag combiner.
5618 // MULHS implicitly sign extends its inputs. Check to see if ExpandOp
5619 // extended the sign bit of the low half through the upper half, and if so
5620 // emit a MULHS instead of the alternate sequence that is valid for any
5621 // i64 x i64 multiply.
5623 // is RH an extension of the sign bit of RL?
5624 RH.getOpcode() == ISD::SRA && RH.getOperand(0) == RL &&
5625 RH.getOperand(1).getOpcode() == ISD::Constant &&
5626 cast<ConstantSDNode>(RH.getOperand(1))->getValue() == SH &&
5627 // is LH an extension of the sign bit of LL?
5628 LH.getOpcode() == ISD::SRA && LH.getOperand(0) == LL &&
5629 LH.getOperand(1).getOpcode() == ISD::Constant &&
5630 cast<ConstantSDNode>(LH.getOperand(1))->getValue() == SH) {
5632 Lo = DAG.getNode(ISD::MUL, NVT, LL, RL);
5634 Hi = DAG.getNode(ISD::MULHS, NVT, LL, RL);
5636 } else if (HasMULHU) {
5638 Lo = DAG.getNode(ISD::MUL, NVT, LL, RL);
5641 Hi = DAG.getNode(ISD::MULHU, NVT, LL, RL);
5642 RH = DAG.getNode(ISD::MUL, NVT, LL, RH);
5643 LH = DAG.getNode(ISD::MUL, NVT, LH, RL);
5644 Hi = DAG.getNode(ISD::ADD, NVT, Hi, RH);
5645 Hi = DAG.getNode(ISD::ADD, NVT, Hi, LH);
5650 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::MUL_I64), Node,
5651 false/*sign irrelevant*/, Hi);
5655 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::SDIV_I64), Node, true, Hi);
5658 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::UDIV_I64), Node, true, Hi);
5661 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::SREM_I64), Node, true, Hi);
5664 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::UREM_I64), Node, true, Hi);
5668 Lo = ExpandLibCall(TLI.getLibcallName((VT == MVT::f32)
5669 ? RTLIB::ADD_F32 : RTLIB::ADD_F64),
5673 Lo = ExpandLibCall(TLI.getLibcallName((VT == MVT::f32)
5674 ? RTLIB::SUB_F32 : RTLIB::SUB_F64),
5678 Lo = ExpandLibCall(TLI.getLibcallName((VT == MVT::f32)
5679 ? RTLIB::MUL_F32 : RTLIB::MUL_F64),
5683 Lo = ExpandLibCall(TLI.getLibcallName((VT == MVT::f32)
5684 ? RTLIB::DIV_F32 : RTLIB::DIV_F64),
5687 case ISD::FP_EXTEND:
5688 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::FPEXT_F32_F64), Node, true,Hi);
5691 Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::FPROUND_F64_F32),Node,true,Hi);
5694 Lo = ExpandLibCall(TLI.getLibcallName((VT == MVT::f32) ? RTLIB::POWI_F32 :
5695 (VT == MVT::f64) ? RTLIB::POWI_F64 :
5702 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
5703 switch(Node->getOpcode()) {
5705 LC = (VT == MVT::f32) ? RTLIB::SQRT_F32 :
5706 (VT == MVT::f64) ? RTLIB::SQRT_F64 : RTLIB::SQRT_LD;
5709 LC = (VT == MVT::f32) ? RTLIB::SIN_F32 : RTLIB::SIN_F64;
5712 LC = (VT == MVT::f32) ? RTLIB::COS_F32 : RTLIB::COS_F64;
5714 default: assert(0 && "Unreachable!");
5716 Lo = ExpandLibCall(TLI.getLibcallName(LC), Node, false, Hi);
5720 SDOperand Mask = (VT == MVT::f64)
5721 ? DAG.getConstantFP(BitsToDouble(~(1ULL << 63)), VT)
5722 : DAG.getConstantFP(BitsToFloat(~(1U << 31)), VT);
5723 Mask = DAG.getNode(ISD::BIT_CONVERT, NVT, Mask);
5724 Lo = DAG.getNode(ISD::BIT_CONVERT, NVT, Node->getOperand(0));
5725 Lo = DAG.getNode(ISD::AND, NVT, Lo, Mask);
5726 if (getTypeAction(NVT) == Expand)
5727 ExpandOp(Lo, Lo, Hi);
5731 SDOperand Mask = (VT == MVT::f64)
5732 ? DAG.getConstantFP(BitsToDouble(1ULL << 63), VT)
5733 : DAG.getConstantFP(BitsToFloat(1U << 31), VT);
5734 Mask = DAG.getNode(ISD::BIT_CONVERT, NVT, Mask);
5735 Lo = DAG.getNode(ISD::BIT_CONVERT, NVT, Node->getOperand(0));
5736 Lo = DAG.getNode(ISD::XOR, NVT, Lo, Mask);
5737 if (getTypeAction(NVT) == Expand)
5738 ExpandOp(Lo, Lo, Hi);
5741 case ISD::FCOPYSIGN: {
5742 Lo = ExpandFCOPYSIGNToBitwiseOps(Node, NVT, DAG, TLI);
5743 if (getTypeAction(NVT) == Expand)
5744 ExpandOp(Lo, Lo, Hi);
5747 case ISD::SINT_TO_FP:
5748 case ISD::UINT_TO_FP: {
5749 bool isSigned = Node->getOpcode() == ISD::SINT_TO_FP;
5750 MVT::ValueType SrcVT = Node->getOperand(0).getValueType();
5751 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
5752 if (Node->getOperand(0).getValueType() == MVT::i64) {
5754 LC = isSigned ? RTLIB::SINTTOFP_I64_F32 : RTLIB::UINTTOFP_I64_F32;
5755 else if (VT == MVT::f64)
5756 LC = isSigned ? RTLIB::SINTTOFP_I64_F64 : RTLIB::UINTTOFP_I64_F64;
5757 else if (VT == MVT::f80 || VT == MVT::f128 || VT == MVT::ppcf128) {
5759 LC = RTLIB::SINTTOFP_I64_LD;
5763 LC = isSigned ? RTLIB::SINTTOFP_I32_F32 : RTLIB::UINTTOFP_I32_F32;
5765 LC = isSigned ? RTLIB::SINTTOFP_I32_F64 : RTLIB::UINTTOFP_I32_F64;
5768 // Promote the operand if needed.
5769 if (getTypeAction(SrcVT) == Promote) {
5770 SDOperand Tmp = PromoteOp(Node->getOperand(0));
5772 ? DAG.getNode(ISD::SIGN_EXTEND_INREG, Tmp.getValueType(), Tmp,
5773 DAG.getValueType(SrcVT))
5774 : DAG.getZeroExtendInReg(Tmp, SrcVT);
5775 Node = DAG.UpdateNodeOperands(Op, Tmp).Val;
5778 const char *LibCall = TLI.getLibcallName(LC);
5780 Lo = ExpandLibCall(TLI.getLibcallName(LC), Node, isSigned, Hi);
5782 Lo = ExpandIntToFP(Node->getOpcode() == ISD::SINT_TO_FP, VT,
5783 Node->getOperand(0));
5784 if (getTypeAction(Lo.getValueType()) == Expand)
5785 ExpandOp(Lo, Lo, Hi);
5791 // Make sure the resultant values have been legalized themselves, unless this
5792 // is a type that requires multi-step expansion.
5793 if (getTypeAction(NVT) != Expand && NVT != MVT::isVoid) {
5794 Lo = LegalizeOp(Lo);
5796 // Don't legalize the high part if it is expanded to a single node.
5797 Hi = LegalizeOp(Hi);
5800 // Remember in a map if the values will be reused later.
5801 bool isNew = ExpandedNodes.insert(std::make_pair(Op, std::make_pair(Lo, Hi)));
5802 assert(isNew && "Value already expanded?!?");
5805 /// SplitVectorOp - Given an operand of vector type, break it down into
5806 /// two smaller values, still of vector type.
5807 void SelectionDAGLegalize::SplitVectorOp(SDOperand Op, SDOperand &Lo,
5809 assert(MVT::isVector(Op.getValueType()) && "Cannot split non-vector type!");
5810 SDNode *Node = Op.Val;
5811 unsigned NumElements = MVT::getVectorNumElements(Op.getValueType());
5812 assert(NumElements > 1 && "Cannot split a single element vector!");
5813 unsigned NewNumElts = NumElements/2;
5814 MVT::ValueType NewEltVT = MVT::getVectorElementType(Op.getValueType());
5815 MVT::ValueType NewVT = MVT::getVectorType(NewEltVT, NewNumElts);
5817 // See if we already split it.
5818 std::map<SDOperand, std::pair<SDOperand, SDOperand> >::iterator I
5819 = SplitNodes.find(Op);
5820 if (I != SplitNodes.end()) {
5821 Lo = I->second.first;
5822 Hi = I->second.second;
5826 switch (Node->getOpcode()) {
5831 assert(0 && "Unhandled operation in SplitVectorOp!");
5832 case ISD::BUILD_PAIR:
5833 Lo = Node->getOperand(0);
5834 Hi = Node->getOperand(1);
5836 case ISD::BUILD_VECTOR: {
5837 SmallVector<SDOperand, 8> LoOps(Node->op_begin(),
5838 Node->op_begin()+NewNumElts);
5839 Lo = DAG.getNode(ISD::BUILD_VECTOR, NewVT, &LoOps[0], LoOps.size());
5841 SmallVector<SDOperand, 8> HiOps(Node->op_begin()+NewNumElts,
5843 Hi = DAG.getNode(ISD::BUILD_VECTOR, NewVT, &HiOps[0], HiOps.size());
5846 case ISD::CONCAT_VECTORS: {
5847 unsigned NewNumSubvectors = Node->getNumOperands() / 2;
5848 if (NewNumSubvectors == 1) {
5849 Lo = Node->getOperand(0);
5850 Hi = Node->getOperand(1);
5852 SmallVector<SDOperand, 8> LoOps(Node->op_begin(),
5853 Node->op_begin()+NewNumSubvectors);
5854 Lo = DAG.getNode(ISD::CONCAT_VECTORS, NewVT, &LoOps[0], LoOps.size());
5856 SmallVector<SDOperand, 8> HiOps(Node->op_begin()+NewNumSubvectors,
5858 Hi = DAG.getNode(ISD::CONCAT_VECTORS, NewVT, &HiOps[0], HiOps.size());
5874 SDOperand LL, LH, RL, RH;
5875 SplitVectorOp(Node->getOperand(0), LL, LH);
5876 SplitVectorOp(Node->getOperand(1), RL, RH);
5878 Lo = DAG.getNode(Node->getOpcode(), NewVT, LL, RL);
5879 Hi = DAG.getNode(Node->getOpcode(), NewVT, LH, RH);
5883 LoadSDNode *LD = cast<LoadSDNode>(Node);
5884 SDOperand Ch = LD->getChain();
5885 SDOperand Ptr = LD->getBasePtr();
5886 const Value *SV = LD->getSrcValue();
5887 int SVOffset = LD->getSrcValueOffset();
5888 unsigned Alignment = LD->getAlignment();
5889 bool isVolatile = LD->isVolatile();
5891 Lo = DAG.getLoad(NewVT, Ch, Ptr, SV, SVOffset, isVolatile, Alignment);
5892 unsigned IncrementSize = NewNumElts * MVT::getSizeInBits(NewEltVT)/8;
5893 Ptr = DAG.getNode(ISD::ADD, Ptr.getValueType(), Ptr,
5894 getIntPtrConstant(IncrementSize));
5895 SVOffset += IncrementSize;
5896 if (Alignment > IncrementSize)
5897 Alignment = IncrementSize;
5898 Hi = DAG.getLoad(NewVT, Ch, Ptr, SV, SVOffset, isVolatile, Alignment);
5900 // Build a factor node to remember that this load is independent of the
5902 SDOperand TF = DAG.getNode(ISD::TokenFactor, MVT::Other, Lo.getValue(1),
5905 // Remember that we legalized the chain.
5906 AddLegalizedOperand(Op.getValue(1), LegalizeOp(TF));
5909 case ISD::BIT_CONVERT: {
5910 // We know the result is a vector. The input may be either a vector or a
5912 SDOperand InOp = Node->getOperand(0);
5913 if (!MVT::isVector(InOp.getValueType()) ||
5914 MVT::getVectorNumElements(InOp.getValueType()) == 1) {
5915 // The input is a scalar or single-element vector.
5916 // Lower to a store/load so that it can be split.
5917 // FIXME: this could be improved probably.
5918 SDOperand Ptr = CreateStackTemporary(InOp.getValueType());
5920 SDOperand St = DAG.getStore(DAG.getEntryNode(),
5921 InOp, Ptr, NULL, 0);
5922 InOp = DAG.getLoad(Op.getValueType(), St, Ptr, NULL, 0);
5924 // Split the vector and convert each of the pieces now.
5925 SplitVectorOp(InOp, Lo, Hi);
5926 Lo = DAG.getNode(ISD::BIT_CONVERT, NewVT, Lo);
5927 Hi = DAG.getNode(ISD::BIT_CONVERT, NewVT, Hi);
5932 // Remember in a map if the values will be reused later.
5934 SplitNodes.insert(std::make_pair(Op, std::make_pair(Lo, Hi))).second;
5935 assert(isNew && "Value already split?!?");
5939 /// ScalarizeVectorOp - Given an operand of single-element vector type
5940 /// (e.g. v1f32), convert it into the equivalent operation that returns a
5941 /// scalar (e.g. f32) value.
5942 SDOperand SelectionDAGLegalize::ScalarizeVectorOp(SDOperand Op) {
5943 assert(MVT::isVector(Op.getValueType()) &&
5944 "Bad ScalarizeVectorOp invocation!");
5945 SDNode *Node = Op.Val;
5946 MVT::ValueType NewVT = MVT::getVectorElementType(Op.getValueType());
5947 assert(MVT::getVectorNumElements(Op.getValueType()) == 1);
5949 // See if we already scalarized it.
5950 std::map<SDOperand, SDOperand>::iterator I = ScalarizedNodes.find(Op);
5951 if (I != ScalarizedNodes.end()) return I->second;
5954 switch (Node->getOpcode()) {
5957 Node->dump(&DAG); cerr << "\n";
5959 assert(0 && "Unknown vector operation in ScalarizeVectorOp!");
5975 Result = DAG.getNode(Node->getOpcode(),
5977 ScalarizeVectorOp(Node->getOperand(0)),
5978 ScalarizeVectorOp(Node->getOperand(1)));
5985 Result = DAG.getNode(Node->getOpcode(),
5987 ScalarizeVectorOp(Node->getOperand(0)));
5990 LoadSDNode *LD = cast<LoadSDNode>(Node);
5991 SDOperand Ch = LegalizeOp(LD->getChain()); // Legalize the chain.
5992 SDOperand Ptr = LegalizeOp(LD->getBasePtr()); // Legalize the pointer.
5994 const Value *SV = LD->getSrcValue();
5995 int SVOffset = LD->getSrcValueOffset();
5996 Result = DAG.getLoad(NewVT, Ch, Ptr, SV, SVOffset,
5997 LD->isVolatile(), LD->getAlignment());
5999 // Remember that we legalized the chain.
6000 AddLegalizedOperand(Op.getValue(1), LegalizeOp(Result.getValue(1)));
6003 case ISD::BUILD_VECTOR:
6004 Result = Node->getOperand(0);
6006 case ISD::INSERT_VECTOR_ELT:
6007 // Returning the inserted scalar element.
6008 Result = Node->getOperand(1);
6010 case ISD::CONCAT_VECTORS:
6011 assert(Node->getOperand(0).getValueType() == NewVT &&
6012 "Concat of non-legal vectors not yet supported!");
6013 Result = Node->getOperand(0);
6015 case ISD::VECTOR_SHUFFLE: {
6016 // Figure out if the scalar is the LHS or RHS and return it.
6017 SDOperand EltNum = Node->getOperand(2).getOperand(0);
6018 if (cast<ConstantSDNode>(EltNum)->getValue())
6019 Result = ScalarizeVectorOp(Node->getOperand(1));
6021 Result = ScalarizeVectorOp(Node->getOperand(0));
6024 case ISD::EXTRACT_SUBVECTOR:
6025 Result = Node->getOperand(0);
6026 assert(Result.getValueType() == NewVT);
6028 case ISD::BIT_CONVERT:
6029 Result = DAG.getNode(ISD::BIT_CONVERT, NewVT, Op.getOperand(0));
6032 Result = DAG.getNode(ISD::SELECT, NewVT, Op.getOperand(0),
6033 ScalarizeVectorOp(Op.getOperand(1)),
6034 ScalarizeVectorOp(Op.getOperand(2)));
6038 if (TLI.isTypeLegal(NewVT))
6039 Result = LegalizeOp(Result);
6040 bool isNew = ScalarizedNodes.insert(std::make_pair(Op, Result)).second;
6041 assert(isNew && "Value already scalarized?");
6046 // SelectionDAG::Legalize - This is the entry point for the file.
6048 void SelectionDAG::Legalize() {
6049 if (ViewLegalizeDAGs) viewGraph();
6051 /// run - This is the main entry point to this class.
6053 SelectionDAGLegalize(*this).LegalizeDAG();