1 //===-- SelectionDAG.cpp - Implement the SelectionDAG data structures -----===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This implements the SelectionDAG class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/SelectionDAG.h"
15 #include "llvm/Constants.h"
16 #include "llvm/GlobalVariable.h"
17 #include "llvm/Intrinsics.h"
18 #include "llvm/DerivedTypes.h"
19 #include "llvm/Assembly/Writer.h"
20 #include "llvm/CodeGen/MachineBasicBlock.h"
21 #include "llvm/CodeGen/MachineConstantPool.h"
22 #include "llvm/CodeGen/MachineFrameInfo.h"
23 #include "llvm/CodeGen/MachineModuleInfo.h"
24 #include "llvm/CodeGen/PseudoSourceValue.h"
25 #include "llvm/Support/MathExtras.h"
26 #include "llvm/Target/TargetRegisterInfo.h"
27 #include "llvm/Target/TargetData.h"
28 #include "llvm/Target/TargetLowering.h"
29 #include "llvm/Target/TargetInstrInfo.h"
30 #include "llvm/Target/TargetMachine.h"
31 #include "llvm/ADT/SetVector.h"
32 #include "llvm/ADT/SmallPtrSet.h"
33 #include "llvm/ADT/SmallSet.h"
34 #include "llvm/ADT/SmallVector.h"
35 #include "llvm/ADT/StringExtras.h"
40 /// makeVTList - Return an instance of the SDVTList struct initialized with the
41 /// specified members.
42 static SDVTList makeVTList(const MVT::ValueType *VTs, unsigned NumVTs) {
43 SDVTList Res = {VTs, NumVTs};
47 SelectionDAG::DAGUpdateListener::~DAGUpdateListener() {}
49 //===----------------------------------------------------------------------===//
50 // ConstantFPSDNode Class
51 //===----------------------------------------------------------------------===//
53 /// isExactlyValue - We don't rely on operator== working on double values, as
54 /// it returns true for things that are clearly not equal, like -0.0 and 0.0.
55 /// As such, this method can be used to do an exact bit-for-bit comparison of
56 /// two floating point values.
57 bool ConstantFPSDNode::isExactlyValue(const APFloat& V) const {
58 return Value.bitwiseIsEqual(V);
61 bool ConstantFPSDNode::isValueValidForType(MVT::ValueType VT,
63 // convert modifies in place, so make a copy.
64 APFloat Val2 = APFloat(Val);
67 return false; // These can't be represented as floating point!
69 // FIXME rounding mode needs to be more flexible
71 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
72 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven) ==
75 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
76 &Val2.getSemantics() == &APFloat::IEEEdouble ||
77 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven) ==
79 // TODO: Figure out how to test if we can use a shorter type instead!
87 //===----------------------------------------------------------------------===//
89 //===----------------------------------------------------------------------===//
91 /// isBuildVectorAllOnes - Return true if the specified node is a
92 /// BUILD_VECTOR where all of the elements are ~0 or undef.
93 bool ISD::isBuildVectorAllOnes(const SDNode *N) {
94 // Look through a bit convert.
95 if (N->getOpcode() == ISD::BIT_CONVERT)
96 N = N->getOperand(0).Val;
98 if (N->getOpcode() != ISD::BUILD_VECTOR) return false;
100 unsigned i = 0, e = N->getNumOperands();
102 // Skip over all of the undef values.
103 while (i != e && N->getOperand(i).getOpcode() == ISD::UNDEF)
106 // Do not accept an all-undef vector.
107 if (i == e) return false;
109 // Do not accept build_vectors that aren't all constants or which have non-~0
111 SDOperand NotZero = N->getOperand(i);
112 if (isa<ConstantSDNode>(NotZero)) {
113 if (!cast<ConstantSDNode>(NotZero)->isAllOnesValue())
115 } else if (isa<ConstantFPSDNode>(NotZero)) {
116 MVT::ValueType VT = NotZero.getValueType();
118 if (((cast<ConstantFPSDNode>(NotZero)->getValueAPF().
119 convertToAPInt().getZExtValue())) != (uint64_t)-1)
122 if ((uint32_t)cast<ConstantFPSDNode>(NotZero)->
123 getValueAPF().convertToAPInt().getZExtValue() !=
130 // Okay, we have at least one ~0 value, check to see if the rest match or are
132 for (++i; i != e; ++i)
133 if (N->getOperand(i) != NotZero &&
134 N->getOperand(i).getOpcode() != ISD::UNDEF)
140 /// isBuildVectorAllZeros - Return true if the specified node is a
141 /// BUILD_VECTOR where all of the elements are 0 or undef.
142 bool ISD::isBuildVectorAllZeros(const SDNode *N) {
143 // Look through a bit convert.
144 if (N->getOpcode() == ISD::BIT_CONVERT)
145 N = N->getOperand(0).Val;
147 if (N->getOpcode() != ISD::BUILD_VECTOR) return false;
149 unsigned i = 0, e = N->getNumOperands();
151 // Skip over all of the undef values.
152 while (i != e && N->getOperand(i).getOpcode() == ISD::UNDEF)
155 // Do not accept an all-undef vector.
156 if (i == e) return false;
158 // Do not accept build_vectors that aren't all constants or which have non-~0
160 SDOperand Zero = N->getOperand(i);
161 if (isa<ConstantSDNode>(Zero)) {
162 if (!cast<ConstantSDNode>(Zero)->isNullValue())
164 } else if (isa<ConstantFPSDNode>(Zero)) {
165 if (!cast<ConstantFPSDNode>(Zero)->getValueAPF().isPosZero())
170 // Okay, we have at least one ~0 value, check to see if the rest match or are
172 for (++i; i != e; ++i)
173 if (N->getOperand(i) != Zero &&
174 N->getOperand(i).getOpcode() != ISD::UNDEF)
179 /// isDebugLabel - Return true if the specified node represents a debug
180 /// label (i.e. ISD::LABEL or TargetInstrInfo::LABEL node and third operand
182 bool ISD::isDebugLabel(const SDNode *N) {
184 if (N->getOpcode() == ISD::LABEL)
185 Zero = N->getOperand(2);
186 else if (N->isTargetOpcode() &&
187 N->getTargetOpcode() == TargetInstrInfo::LABEL)
188 // Chain moved to last operand.
189 Zero = N->getOperand(1);
192 return isa<ConstantSDNode>(Zero) && cast<ConstantSDNode>(Zero)->isNullValue();
195 /// getSetCCSwappedOperands - Return the operation corresponding to (Y op X)
196 /// when given the operation for (X op Y).
197 ISD::CondCode ISD::getSetCCSwappedOperands(ISD::CondCode Operation) {
198 // To perform this operation, we just need to swap the L and G bits of the
200 unsigned OldL = (Operation >> 2) & 1;
201 unsigned OldG = (Operation >> 1) & 1;
202 return ISD::CondCode((Operation & ~6) | // Keep the N, U, E bits
203 (OldL << 1) | // New G bit
204 (OldG << 2)); // New L bit.
207 /// getSetCCInverse - Return the operation corresponding to !(X op Y), where
208 /// 'op' is a valid SetCC operation.
209 ISD::CondCode ISD::getSetCCInverse(ISD::CondCode Op, bool isInteger) {
210 unsigned Operation = Op;
212 Operation ^= 7; // Flip L, G, E bits, but not U.
214 Operation ^= 15; // Flip all of the condition bits.
215 if (Operation > ISD::SETTRUE2)
216 Operation &= ~8; // Don't let N and U bits get set.
217 return ISD::CondCode(Operation);
221 /// isSignedOp - For an integer comparison, return 1 if the comparison is a
222 /// signed operation and 2 if the result is an unsigned comparison. Return zero
223 /// if the operation does not depend on the sign of the input (setne and seteq).
224 static int isSignedOp(ISD::CondCode Opcode) {
226 default: assert(0 && "Illegal integer setcc operation!");
228 case ISD::SETNE: return 0;
232 case ISD::SETGE: return 1;
236 case ISD::SETUGE: return 2;
240 /// getSetCCOrOperation - Return the result of a logical OR between different
241 /// comparisons of identical values: ((X op1 Y) | (X op2 Y)). This function
242 /// returns SETCC_INVALID if it is not possible to represent the resultant
244 ISD::CondCode ISD::getSetCCOrOperation(ISD::CondCode Op1, ISD::CondCode Op2,
246 if (isInteger && (isSignedOp(Op1) | isSignedOp(Op2)) == 3)
247 // Cannot fold a signed integer setcc with an unsigned integer setcc.
248 return ISD::SETCC_INVALID;
250 unsigned Op = Op1 | Op2; // Combine all of the condition bits.
252 // If the N and U bits get set then the resultant comparison DOES suddenly
253 // care about orderedness, and is true when ordered.
254 if (Op > ISD::SETTRUE2)
255 Op &= ~16; // Clear the U bit if the N bit is set.
257 // Canonicalize illegal integer setcc's.
258 if (isInteger && Op == ISD::SETUNE) // e.g. SETUGT | SETULT
261 return ISD::CondCode(Op);
264 /// getSetCCAndOperation - Return the result of a logical AND between different
265 /// comparisons of identical values: ((X op1 Y) & (X op2 Y)). This
266 /// function returns zero if it is not possible to represent the resultant
268 ISD::CondCode ISD::getSetCCAndOperation(ISD::CondCode Op1, ISD::CondCode Op2,
270 if (isInteger && (isSignedOp(Op1) | isSignedOp(Op2)) == 3)
271 // Cannot fold a signed setcc with an unsigned setcc.
272 return ISD::SETCC_INVALID;
274 // Combine all of the condition bits.
275 ISD::CondCode Result = ISD::CondCode(Op1 & Op2);
277 // Canonicalize illegal integer setcc's.
281 case ISD::SETUO : Result = ISD::SETFALSE; break; // SETUGT & SETULT
282 case ISD::SETUEQ: Result = ISD::SETEQ ; break; // SETUGE & SETULE
283 case ISD::SETOLT: Result = ISD::SETULT ; break; // SETULT & SETNE
284 case ISD::SETOGT: Result = ISD::SETUGT ; break; // SETUGT & SETNE
291 const TargetMachine &SelectionDAG::getTarget() const {
292 return TLI.getTargetMachine();
295 //===----------------------------------------------------------------------===//
296 // SDNode Profile Support
297 //===----------------------------------------------------------------------===//
299 /// AddNodeIDOpcode - Add the node opcode to the NodeID data.
301 static void AddNodeIDOpcode(FoldingSetNodeID &ID, unsigned OpC) {
305 /// AddNodeIDValueTypes - Value type lists are intern'd so we can represent them
306 /// solely with their pointer.
307 void AddNodeIDValueTypes(FoldingSetNodeID &ID, SDVTList VTList) {
308 ID.AddPointer(VTList.VTs);
311 /// AddNodeIDOperands - Various routines for adding operands to the NodeID data.
313 static void AddNodeIDOperands(FoldingSetNodeID &ID,
314 const SDOperand *Ops, unsigned NumOps) {
315 for (; NumOps; --NumOps, ++Ops) {
316 ID.AddPointer(Ops->Val);
317 ID.AddInteger(Ops->ResNo);
321 static void AddNodeIDNode(FoldingSetNodeID &ID,
322 unsigned short OpC, SDVTList VTList,
323 const SDOperand *OpList, unsigned N) {
324 AddNodeIDOpcode(ID, OpC);
325 AddNodeIDValueTypes(ID, VTList);
326 AddNodeIDOperands(ID, OpList, N);
329 /// AddNodeIDNode - Generic routine for adding a nodes info to the NodeID
331 static void AddNodeIDNode(FoldingSetNodeID &ID, SDNode *N) {
332 AddNodeIDOpcode(ID, N->getOpcode());
333 // Add the return value info.
334 AddNodeIDValueTypes(ID, N->getVTList());
335 // Add the operand info.
336 AddNodeIDOperands(ID, N->op_begin(), N->getNumOperands());
338 // Handle SDNode leafs with special info.
339 switch (N->getOpcode()) {
340 default: break; // Normal nodes don't need extra info.
341 case ISD::TargetConstant:
343 ID.AddInteger(cast<ConstantSDNode>(N)->getValue());
345 case ISD::TargetConstantFP:
346 case ISD::ConstantFP: {
347 ID.Add(cast<ConstantFPSDNode>(N)->getValueAPF());
350 case ISD::TargetGlobalAddress:
351 case ISD::GlobalAddress:
352 case ISD::TargetGlobalTLSAddress:
353 case ISD::GlobalTLSAddress: {
354 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(N);
355 ID.AddPointer(GA->getGlobal());
356 ID.AddInteger(GA->getOffset());
359 case ISD::BasicBlock:
360 ID.AddPointer(cast<BasicBlockSDNode>(N)->getBasicBlock());
363 ID.AddInteger(cast<RegisterSDNode>(N)->getReg());
366 ID.AddPointer(cast<SrcValueSDNode>(N)->getValue());
368 case ISD::MEMOPERAND: {
369 const MemOperand &MO = cast<MemOperandSDNode>(N)->MO;
370 ID.AddPointer(MO.getValue());
371 ID.AddInteger(MO.getFlags());
372 ID.AddInteger(MO.getOffset());
373 ID.AddInteger(MO.getSize());
374 ID.AddInteger(MO.getAlignment());
377 case ISD::FrameIndex:
378 case ISD::TargetFrameIndex:
379 ID.AddInteger(cast<FrameIndexSDNode>(N)->getIndex());
382 case ISD::TargetJumpTable:
383 ID.AddInteger(cast<JumpTableSDNode>(N)->getIndex());
385 case ISD::ConstantPool:
386 case ISD::TargetConstantPool: {
387 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(N);
388 ID.AddInteger(CP->getAlignment());
389 ID.AddInteger(CP->getOffset());
390 if (CP->isMachineConstantPoolEntry())
391 CP->getMachineCPVal()->AddSelectionDAGCSEId(ID);
393 ID.AddPointer(CP->getConstVal());
397 LoadSDNode *LD = cast<LoadSDNode>(N);
398 ID.AddInteger(LD->getAddressingMode());
399 ID.AddInteger(LD->getExtensionType());
400 ID.AddInteger((unsigned int)(LD->getMemoryVT()));
401 ID.AddInteger(LD->getAlignment());
402 ID.AddInteger(LD->isVolatile());
406 StoreSDNode *ST = cast<StoreSDNode>(N);
407 ID.AddInteger(ST->getAddressingMode());
408 ID.AddInteger(ST->isTruncatingStore());
409 ID.AddInteger((unsigned int)(ST->getMemoryVT()));
410 ID.AddInteger(ST->getAlignment());
411 ID.AddInteger(ST->isVolatile());
417 //===----------------------------------------------------------------------===//
418 // SelectionDAG Class
419 //===----------------------------------------------------------------------===//
421 /// RemoveDeadNodes - This method deletes all unreachable nodes in the
423 void SelectionDAG::RemoveDeadNodes() {
424 // Create a dummy node (which is not added to allnodes), that adds a reference
425 // to the root node, preventing it from being deleted.
426 HandleSDNode Dummy(getRoot());
428 SmallVector<SDNode*, 128> DeadNodes;
430 // Add all obviously-dead nodes to the DeadNodes worklist.
431 for (allnodes_iterator I = allnodes_begin(), E = allnodes_end(); I != E; ++I)
433 DeadNodes.push_back(I);
435 // Process the worklist, deleting the nodes and adding their uses to the
437 while (!DeadNodes.empty()) {
438 SDNode *N = DeadNodes.back();
439 DeadNodes.pop_back();
441 // Take the node out of the appropriate CSE map.
442 RemoveNodeFromCSEMaps(N);
444 // Next, brutally remove the operand list. This is safe to do, as there are
445 // no cycles in the graph.
446 for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) {
447 SDNode *Operand = I->Val;
448 Operand->removeUser(N);
450 // Now that we removed this operand, see if there are no uses of it left.
451 if (Operand->use_empty())
452 DeadNodes.push_back(Operand);
454 if (N->OperandsNeedDelete)
455 delete[] N->OperandList;
459 // Finally, remove N itself.
463 // If the root changed (e.g. it was a dead load, update the root).
464 setRoot(Dummy.getValue());
467 void SelectionDAG::RemoveDeadNode(SDNode *N, DAGUpdateListener *UpdateListener){
468 SmallVector<SDNode*, 16> DeadNodes;
469 DeadNodes.push_back(N);
471 // Process the worklist, deleting the nodes and adding their uses to the
473 while (!DeadNodes.empty()) {
474 SDNode *N = DeadNodes.back();
475 DeadNodes.pop_back();
478 UpdateListener->NodeDeleted(N);
480 // Take the node out of the appropriate CSE map.
481 RemoveNodeFromCSEMaps(N);
483 // Next, brutally remove the operand list. This is safe to do, as there are
484 // no cycles in the graph.
485 for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) {
486 SDNode *Operand = I->Val;
487 Operand->removeUser(N);
489 // Now that we removed this operand, see if there are no uses of it left.
490 if (Operand->use_empty())
491 DeadNodes.push_back(Operand);
493 if (N->OperandsNeedDelete)
494 delete[] N->OperandList;
498 // Finally, remove N itself.
503 void SelectionDAG::DeleteNode(SDNode *N) {
504 assert(N->use_empty() && "Cannot delete a node that is not dead!");
506 // First take this out of the appropriate CSE map.
507 RemoveNodeFromCSEMaps(N);
509 // Finally, remove uses due to operands of this node, remove from the
510 // AllNodes list, and delete the node.
511 DeleteNodeNotInCSEMaps(N);
514 void SelectionDAG::DeleteNodeNotInCSEMaps(SDNode *N) {
516 // Remove it from the AllNodes list.
519 // Drop all of the operands and decrement used nodes use counts.
520 for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I)
521 I->Val->removeUser(N);
522 if (N->OperandsNeedDelete)
523 delete[] N->OperandList;
530 /// RemoveNodeFromCSEMaps - Take the specified node out of the CSE map that
531 /// correspond to it. This is useful when we're about to delete or repurpose
532 /// the node. We don't want future request for structurally identical nodes
533 /// to return N anymore.
534 void SelectionDAG::RemoveNodeFromCSEMaps(SDNode *N) {
536 switch (N->getOpcode()) {
537 case ISD::HANDLENODE: return; // noop.
539 Erased = StringNodes.erase(cast<StringSDNode>(N)->getValue());
542 assert(CondCodeNodes[cast<CondCodeSDNode>(N)->get()] &&
543 "Cond code doesn't exist!");
544 Erased = CondCodeNodes[cast<CondCodeSDNode>(N)->get()] != 0;
545 CondCodeNodes[cast<CondCodeSDNode>(N)->get()] = 0;
547 case ISD::ExternalSymbol:
548 Erased = ExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol());
550 case ISD::TargetExternalSymbol:
552 TargetExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol());
554 case ISD::VALUETYPE: {
555 MVT::ValueType VT = cast<VTSDNode>(N)->getVT();
556 if (MVT::isExtendedVT(VT)) {
557 Erased = ExtendedValueTypeNodes.erase(VT);
559 Erased = ValueTypeNodes[VT] != 0;
560 ValueTypeNodes[VT] = 0;
565 // Remove it from the CSE Map.
566 Erased = CSEMap.RemoveNode(N);
570 // Verify that the node was actually in one of the CSE maps, unless it has a
571 // flag result (which cannot be CSE'd) or is one of the special cases that are
572 // not subject to CSE.
573 if (!Erased && N->getValueType(N->getNumValues()-1) != MVT::Flag &&
574 !N->isTargetOpcode()) {
577 assert(0 && "Node is not in map!");
582 /// AddNonLeafNodeToCSEMaps - Add the specified node back to the CSE maps. It
583 /// has been taken out and modified in some way. If the specified node already
584 /// exists in the CSE maps, do not modify the maps, but return the existing node
585 /// instead. If it doesn't exist, add it and return null.
587 SDNode *SelectionDAG::AddNonLeafNodeToCSEMaps(SDNode *N) {
588 assert(N->getNumOperands() && "This is a leaf node!");
589 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag)
590 return 0; // Never add these nodes.
592 // Check that remaining values produced are not flags.
593 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i)
594 if (N->getValueType(i) == MVT::Flag)
595 return 0; // Never CSE anything that produces a flag.
597 SDNode *New = CSEMap.GetOrInsertNode(N);
598 if (New != N) return New; // Node already existed.
602 /// FindModifiedNodeSlot - Find a slot for the specified node if its operands
603 /// were replaced with those specified. If this node is never memoized,
604 /// return null, otherwise return a pointer to the slot it would take. If a
605 /// node already exists with these operands, the slot will be non-null.
606 SDNode *SelectionDAG::FindModifiedNodeSlot(SDNode *N, SDOperand Op,
608 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag)
609 return 0; // Never add these nodes.
611 // Check that remaining values produced are not flags.
612 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i)
613 if (N->getValueType(i) == MVT::Flag)
614 return 0; // Never CSE anything that produces a flag.
616 SDOperand Ops[] = { Op };
618 AddNodeIDNode(ID, N->getOpcode(), N->getVTList(), Ops, 1);
619 return CSEMap.FindNodeOrInsertPos(ID, InsertPos);
622 /// FindModifiedNodeSlot - Find a slot for the specified node if its operands
623 /// were replaced with those specified. If this node is never memoized,
624 /// return null, otherwise return a pointer to the slot it would take. If a
625 /// node already exists with these operands, the slot will be non-null.
626 SDNode *SelectionDAG::FindModifiedNodeSlot(SDNode *N,
627 SDOperand Op1, SDOperand Op2,
629 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag)
630 return 0; // Never add these nodes.
632 // Check that remaining values produced are not flags.
633 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i)
634 if (N->getValueType(i) == MVT::Flag)
635 return 0; // Never CSE anything that produces a flag.
637 SDOperand Ops[] = { Op1, Op2 };
639 AddNodeIDNode(ID, N->getOpcode(), N->getVTList(), Ops, 2);
640 return CSEMap.FindNodeOrInsertPos(ID, InsertPos);
644 /// FindModifiedNodeSlot - Find a slot for the specified node if its operands
645 /// were replaced with those specified. If this node is never memoized,
646 /// return null, otherwise return a pointer to the slot it would take. If a
647 /// node already exists with these operands, the slot will be non-null.
648 SDNode *SelectionDAG::FindModifiedNodeSlot(SDNode *N,
649 const SDOperand *Ops,unsigned NumOps,
651 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag)
652 return 0; // Never add these nodes.
654 // Check that remaining values produced are not flags.
655 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i)
656 if (N->getValueType(i) == MVT::Flag)
657 return 0; // Never CSE anything that produces a flag.
660 AddNodeIDNode(ID, N->getOpcode(), N->getVTList(), Ops, NumOps);
662 if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
663 ID.AddInteger(LD->getAddressingMode());
664 ID.AddInteger(LD->getExtensionType());
665 ID.AddInteger((unsigned int)(LD->getMemoryVT()));
666 ID.AddInteger(LD->getAlignment());
667 ID.AddInteger(LD->isVolatile());
668 } else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
669 ID.AddInteger(ST->getAddressingMode());
670 ID.AddInteger(ST->isTruncatingStore());
671 ID.AddInteger((unsigned int)(ST->getMemoryVT()));
672 ID.AddInteger(ST->getAlignment());
673 ID.AddInteger(ST->isVolatile());
676 return CSEMap.FindNodeOrInsertPos(ID, InsertPos);
680 SelectionDAG::~SelectionDAG() {
681 while (!AllNodes.empty()) {
682 SDNode *N = AllNodes.begin();
683 N->SetNextInBucket(0);
684 if (N->OperandsNeedDelete)
685 delete [] N->OperandList;
688 AllNodes.pop_front();
692 SDOperand SelectionDAG::getZeroExtendInReg(SDOperand Op, MVT::ValueType VT) {
693 if (Op.getValueType() == VT) return Op;
694 int64_t Imm = ~0ULL >> (64-MVT::getSizeInBits(VT));
695 return getNode(ISD::AND, Op.getValueType(), Op,
696 getConstant(Imm, Op.getValueType()));
699 SDOperand SelectionDAG::getString(const std::string &Val) {
700 StringSDNode *&N = StringNodes[Val];
702 N = new StringSDNode(Val);
703 AllNodes.push_back(N);
705 return SDOperand(N, 0);
708 SDOperand SelectionDAG::getConstant(uint64_t Val, MVT::ValueType VT, bool isT) {
709 MVT::ValueType EltVT =
710 MVT::isVector(VT) ? MVT::getVectorElementType(VT) : VT;
712 return getConstant(APInt(MVT::getSizeInBits(EltVT), Val), VT, isT);
715 SDOperand SelectionDAG::getConstant(const APInt &Val, MVT::ValueType VT, bool isT) {
716 assert(MVT::isInteger(VT) && "Cannot create FP integer constant!");
718 MVT::ValueType EltVT =
719 MVT::isVector(VT) ? MVT::getVectorElementType(VT) : VT;
721 assert(Val.getBitWidth() == MVT::getSizeInBits(EltVT) &&
722 "APInt size does not match type size!");
724 unsigned Opc = isT ? ISD::TargetConstant : ISD::Constant;
726 AddNodeIDNode(ID, Opc, getVTList(EltVT), 0, 0);
730 if ((N = CSEMap.FindNodeOrInsertPos(ID, IP)))
731 if (!MVT::isVector(VT))
732 return SDOperand(N, 0);
734 N = new ConstantSDNode(isT, Val, EltVT);
735 CSEMap.InsertNode(N, IP);
736 AllNodes.push_back(N);
739 SDOperand Result(N, 0);
740 if (MVT::isVector(VT)) {
741 SmallVector<SDOperand, 8> Ops;
742 Ops.assign(MVT::getVectorNumElements(VT), Result);
743 Result = getNode(ISD::BUILD_VECTOR, VT, &Ops[0], Ops.size());
748 SDOperand SelectionDAG::getIntPtrConstant(uint64_t Val, bool isTarget) {
749 return getConstant(Val, TLI.getPointerTy(), isTarget);
753 SDOperand SelectionDAG::getConstantFP(const APFloat& V, MVT::ValueType VT,
755 assert(MVT::isFloatingPoint(VT) && "Cannot create integer FP constant!");
757 MVT::ValueType EltVT =
758 MVT::isVector(VT) ? MVT::getVectorElementType(VT) : VT;
760 // Do the map lookup using the actual bit pattern for the floating point
761 // value, so that we don't have problems with 0.0 comparing equal to -0.0, and
762 // we don't have issues with SNANs.
763 unsigned Opc = isTarget ? ISD::TargetConstantFP : ISD::ConstantFP;
765 AddNodeIDNode(ID, Opc, getVTList(EltVT), 0, 0);
769 if ((N = CSEMap.FindNodeOrInsertPos(ID, IP)))
770 if (!MVT::isVector(VT))
771 return SDOperand(N, 0);
773 N = new ConstantFPSDNode(isTarget, V, EltVT);
774 CSEMap.InsertNode(N, IP);
775 AllNodes.push_back(N);
778 SDOperand Result(N, 0);
779 if (MVT::isVector(VT)) {
780 SmallVector<SDOperand, 8> Ops;
781 Ops.assign(MVT::getVectorNumElements(VT), Result);
782 Result = getNode(ISD::BUILD_VECTOR, VT, &Ops[0], Ops.size());
787 SDOperand SelectionDAG::getConstantFP(double Val, MVT::ValueType VT,
789 MVT::ValueType EltVT =
790 MVT::isVector(VT) ? MVT::getVectorElementType(VT) : VT;
792 return getConstantFP(APFloat((float)Val), VT, isTarget);
794 return getConstantFP(APFloat(Val), VT, isTarget);
797 SDOperand SelectionDAG::getGlobalAddress(const GlobalValue *GV,
798 MVT::ValueType VT, int Offset,
800 const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
802 if (GVar && GVar->isThreadLocal())
803 Opc = isTargetGA ? ISD::TargetGlobalTLSAddress : ISD::GlobalTLSAddress;
805 Opc = isTargetGA ? ISD::TargetGlobalAddress : ISD::GlobalAddress;
807 AddNodeIDNode(ID, Opc, getVTList(VT), 0, 0);
809 ID.AddInteger(Offset);
811 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
812 return SDOperand(E, 0);
813 SDNode *N = new GlobalAddressSDNode(isTargetGA, GV, VT, Offset);
814 CSEMap.InsertNode(N, IP);
815 AllNodes.push_back(N);
816 return SDOperand(N, 0);
819 SDOperand SelectionDAG::getFrameIndex(int FI, MVT::ValueType VT,
821 unsigned Opc = isTarget ? ISD::TargetFrameIndex : ISD::FrameIndex;
823 AddNodeIDNode(ID, Opc, getVTList(VT), 0, 0);
826 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
827 return SDOperand(E, 0);
828 SDNode *N = new FrameIndexSDNode(FI, VT, isTarget);
829 CSEMap.InsertNode(N, IP);
830 AllNodes.push_back(N);
831 return SDOperand(N, 0);
834 SDOperand SelectionDAG::getJumpTable(int JTI, MVT::ValueType VT, bool isTarget){
835 unsigned Opc = isTarget ? ISD::TargetJumpTable : ISD::JumpTable;
837 AddNodeIDNode(ID, Opc, getVTList(VT), 0, 0);
840 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
841 return SDOperand(E, 0);
842 SDNode *N = new JumpTableSDNode(JTI, VT, isTarget);
843 CSEMap.InsertNode(N, IP);
844 AllNodes.push_back(N);
845 return SDOperand(N, 0);
848 SDOperand SelectionDAG::getConstantPool(Constant *C, MVT::ValueType VT,
849 unsigned Alignment, int Offset,
851 unsigned Opc = isTarget ? ISD::TargetConstantPool : ISD::ConstantPool;
853 AddNodeIDNode(ID, Opc, getVTList(VT), 0, 0);
854 ID.AddInteger(Alignment);
855 ID.AddInteger(Offset);
858 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
859 return SDOperand(E, 0);
860 SDNode *N = new ConstantPoolSDNode(isTarget, C, VT, Offset, Alignment);
861 CSEMap.InsertNode(N, IP);
862 AllNodes.push_back(N);
863 return SDOperand(N, 0);
867 SDOperand SelectionDAG::getConstantPool(MachineConstantPoolValue *C,
869 unsigned Alignment, int Offset,
871 unsigned Opc = isTarget ? ISD::TargetConstantPool : ISD::ConstantPool;
873 AddNodeIDNode(ID, Opc, getVTList(VT), 0, 0);
874 ID.AddInteger(Alignment);
875 ID.AddInteger(Offset);
876 C->AddSelectionDAGCSEId(ID);
878 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
879 return SDOperand(E, 0);
880 SDNode *N = new ConstantPoolSDNode(isTarget, C, VT, Offset, Alignment);
881 CSEMap.InsertNode(N, IP);
882 AllNodes.push_back(N);
883 return SDOperand(N, 0);
887 SDOperand SelectionDAG::getBasicBlock(MachineBasicBlock *MBB) {
889 AddNodeIDNode(ID, ISD::BasicBlock, getVTList(MVT::Other), 0, 0);
892 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
893 return SDOperand(E, 0);
894 SDNode *N = new BasicBlockSDNode(MBB);
895 CSEMap.InsertNode(N, IP);
896 AllNodes.push_back(N);
897 return SDOperand(N, 0);
900 SDOperand SelectionDAG::getValueType(MVT::ValueType VT) {
901 if (!MVT::isExtendedVT(VT) && (unsigned)VT >= ValueTypeNodes.size())
902 ValueTypeNodes.resize(VT+1);
904 SDNode *&N = MVT::isExtendedVT(VT) ?
905 ExtendedValueTypeNodes[VT] : ValueTypeNodes[VT];
907 if (N) return SDOperand(N, 0);
908 N = new VTSDNode(VT);
909 AllNodes.push_back(N);
910 return SDOperand(N, 0);
913 SDOperand SelectionDAG::getExternalSymbol(const char *Sym, MVT::ValueType VT) {
914 SDNode *&N = ExternalSymbols[Sym];
915 if (N) return SDOperand(N, 0);
916 N = new ExternalSymbolSDNode(false, Sym, VT);
917 AllNodes.push_back(N);
918 return SDOperand(N, 0);
921 SDOperand SelectionDAG::getTargetExternalSymbol(const char *Sym,
923 SDNode *&N = TargetExternalSymbols[Sym];
924 if (N) return SDOperand(N, 0);
925 N = new ExternalSymbolSDNode(true, Sym, VT);
926 AllNodes.push_back(N);
927 return SDOperand(N, 0);
930 SDOperand SelectionDAG::getCondCode(ISD::CondCode Cond) {
931 if ((unsigned)Cond >= CondCodeNodes.size())
932 CondCodeNodes.resize(Cond+1);
934 if (CondCodeNodes[Cond] == 0) {
935 CondCodeNodes[Cond] = new CondCodeSDNode(Cond);
936 AllNodes.push_back(CondCodeNodes[Cond]);
938 return SDOperand(CondCodeNodes[Cond], 0);
941 SDOperand SelectionDAG::getRegister(unsigned RegNo, MVT::ValueType VT) {
943 AddNodeIDNode(ID, ISD::Register, getVTList(VT), 0, 0);
944 ID.AddInteger(RegNo);
946 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
947 return SDOperand(E, 0);
948 SDNode *N = new RegisterSDNode(RegNo, VT);
949 CSEMap.InsertNode(N, IP);
950 AllNodes.push_back(N);
951 return SDOperand(N, 0);
954 SDOperand SelectionDAG::getSrcValue(const Value *V) {
955 assert((!V || isa<PointerType>(V->getType())) &&
956 "SrcValue is not a pointer?");
959 AddNodeIDNode(ID, ISD::SRCVALUE, getVTList(MVT::Other), 0, 0);
963 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
964 return SDOperand(E, 0);
966 SDNode *N = new SrcValueSDNode(V);
967 CSEMap.InsertNode(N, IP);
968 AllNodes.push_back(N);
969 return SDOperand(N, 0);
972 SDOperand SelectionDAG::getMemOperand(const MemOperand &MO) {
973 const Value *v = MO.getValue();
974 assert((!v || isa<PointerType>(v->getType())) &&
975 "SrcValue is not a pointer?");
978 AddNodeIDNode(ID, ISD::MEMOPERAND, getVTList(MVT::Other), 0, 0);
980 ID.AddInteger(MO.getFlags());
981 ID.AddInteger(MO.getOffset());
982 ID.AddInteger(MO.getSize());
983 ID.AddInteger(MO.getAlignment());
986 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
987 return SDOperand(E, 0);
989 SDNode *N = new MemOperandSDNode(MO);
990 CSEMap.InsertNode(N, IP);
991 AllNodes.push_back(N);
992 return SDOperand(N, 0);
995 /// CreateStackTemporary - Create a stack temporary, suitable for holding the
996 /// specified value type.
997 SDOperand SelectionDAG::CreateStackTemporary(MVT::ValueType VT) {
998 MachineFrameInfo *FrameInfo = getMachineFunction().getFrameInfo();
999 unsigned ByteSize = MVT::getSizeInBits(VT)/8;
1000 const Type *Ty = MVT::getTypeForValueType(VT);
1001 unsigned StackAlign = (unsigned)TLI.getTargetData()->getPrefTypeAlignment(Ty);
1002 int FrameIdx = FrameInfo->CreateStackObject(ByteSize, StackAlign);
1003 return getFrameIndex(FrameIdx, TLI.getPointerTy());
1007 SDOperand SelectionDAG::FoldSetCC(MVT::ValueType VT, SDOperand N1,
1008 SDOperand N2, ISD::CondCode Cond) {
1009 // These setcc operations always fold.
1013 case ISD::SETFALSE2: return getConstant(0, VT);
1015 case ISD::SETTRUE2: return getConstant(1, VT);
1027 assert(!MVT::isInteger(N1.getValueType()) && "Illegal setcc for integer!");
1031 if (ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val)) {
1032 uint64_t C2 = N2C->getValue();
1033 if (ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val)) {
1034 uint64_t C1 = N1C->getValue();
1036 // Sign extend the operands if required
1037 if (ISD::isSignedIntSetCC(Cond)) {
1038 C1 = N1C->getSignExtended();
1039 C2 = N2C->getSignExtended();
1043 default: assert(0 && "Unknown integer setcc!");
1044 case ISD::SETEQ: return getConstant(C1 == C2, VT);
1045 case ISD::SETNE: return getConstant(C1 != C2, VT);
1046 case ISD::SETULT: return getConstant(C1 < C2, VT);
1047 case ISD::SETUGT: return getConstant(C1 > C2, VT);
1048 case ISD::SETULE: return getConstant(C1 <= C2, VT);
1049 case ISD::SETUGE: return getConstant(C1 >= C2, VT);
1050 case ISD::SETLT: return getConstant((int64_t)C1 < (int64_t)C2, VT);
1051 case ISD::SETGT: return getConstant((int64_t)C1 > (int64_t)C2, VT);
1052 case ISD::SETLE: return getConstant((int64_t)C1 <= (int64_t)C2, VT);
1053 case ISD::SETGE: return getConstant((int64_t)C1 >= (int64_t)C2, VT);
1057 if (ConstantFPSDNode *N1C = dyn_cast<ConstantFPSDNode>(N1.Val))
1058 if (ConstantFPSDNode *N2C = dyn_cast<ConstantFPSDNode>(N2.Val)) {
1059 // No compile time operations on this type yet.
1060 if (N1C->getValueType(0) == MVT::ppcf128)
1063 APFloat::cmpResult R = N1C->getValueAPF().compare(N2C->getValueAPF());
1066 case ISD::SETEQ: if (R==APFloat::cmpUnordered)
1067 return getNode(ISD::UNDEF, VT);
1069 case ISD::SETOEQ: return getConstant(R==APFloat::cmpEqual, VT);
1070 case ISD::SETNE: if (R==APFloat::cmpUnordered)
1071 return getNode(ISD::UNDEF, VT);
1073 case ISD::SETONE: return getConstant(R==APFloat::cmpGreaterThan ||
1074 R==APFloat::cmpLessThan, VT);
1075 case ISD::SETLT: if (R==APFloat::cmpUnordered)
1076 return getNode(ISD::UNDEF, VT);
1078 case ISD::SETOLT: return getConstant(R==APFloat::cmpLessThan, VT);
1079 case ISD::SETGT: if (R==APFloat::cmpUnordered)
1080 return getNode(ISD::UNDEF, VT);
1082 case ISD::SETOGT: return getConstant(R==APFloat::cmpGreaterThan, VT);
1083 case ISD::SETLE: if (R==APFloat::cmpUnordered)
1084 return getNode(ISD::UNDEF, VT);
1086 case ISD::SETOLE: return getConstant(R==APFloat::cmpLessThan ||
1087 R==APFloat::cmpEqual, VT);
1088 case ISD::SETGE: if (R==APFloat::cmpUnordered)
1089 return getNode(ISD::UNDEF, VT);
1091 case ISD::SETOGE: return getConstant(R==APFloat::cmpGreaterThan ||
1092 R==APFloat::cmpEqual, VT);
1093 case ISD::SETO: return getConstant(R!=APFloat::cmpUnordered, VT);
1094 case ISD::SETUO: return getConstant(R==APFloat::cmpUnordered, VT);
1095 case ISD::SETUEQ: return getConstant(R==APFloat::cmpUnordered ||
1096 R==APFloat::cmpEqual, VT);
1097 case ISD::SETUNE: return getConstant(R!=APFloat::cmpEqual, VT);
1098 case ISD::SETULT: return getConstant(R==APFloat::cmpUnordered ||
1099 R==APFloat::cmpLessThan, VT);
1100 case ISD::SETUGT: return getConstant(R==APFloat::cmpGreaterThan ||
1101 R==APFloat::cmpUnordered, VT);
1102 case ISD::SETULE: return getConstant(R!=APFloat::cmpGreaterThan, VT);
1103 case ISD::SETUGE: return getConstant(R!=APFloat::cmpLessThan, VT);
1106 // Ensure that the constant occurs on the RHS.
1107 return getSetCC(VT, N2, N1, ISD::getSetCCSwappedOperands(Cond));
1110 // Could not fold it.
1114 /// MaskedValueIsZero - Return true if 'V & Mask' is known to be zero. We use
1115 /// this predicate to simplify operations downstream. Mask is known to be zero
1116 /// for bits that V cannot have.
1117 bool SelectionDAG::MaskedValueIsZero(SDOperand Op, uint64_t Mask,
1118 unsigned Depth) const {
1119 // The masks are not wide enough to represent this type! Should use APInt.
1120 if (Op.getValueType() == MVT::i128)
1123 uint64_t KnownZero, KnownOne;
1124 ComputeMaskedBits(Op, Mask, KnownZero, KnownOne, Depth);
1125 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1126 return (KnownZero & Mask) == Mask;
1129 /// ComputeMaskedBits - Determine which of the bits specified in Mask are
1130 /// known to be either zero or one and return them in the KnownZero/KnownOne
1131 /// bitsets. This code only analyzes bits in Mask, in order to short-circuit
1133 void SelectionDAG::ComputeMaskedBits(SDOperand Op, const APInt &Mask,
1134 APInt &KnownZero, APInt &KnownOne,
1135 unsigned Depth) const {
1136 unsigned BitWidth = Mask.getBitWidth();
1137 assert(BitWidth == MVT::getSizeInBits(Op.getValueType()) &&
1138 "Mask size mismatches value type size!");
1140 KnownZero = KnownOne = APInt(BitWidth, 0); // Don't know anything.
1141 if (Depth == 6 || Mask == 0)
1142 return; // Limit search depth.
1144 APInt KnownZero2, KnownOne2;
1146 switch (Op.getOpcode()) {
1148 // We know all of the bits for a constant!
1149 KnownOne = cast<ConstantSDNode>(Op)->getAPIntValue() & Mask;
1150 KnownZero = ~KnownOne & Mask;
1153 // If either the LHS or the RHS are Zero, the result is zero.
1154 ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne, Depth+1);
1155 ComputeMaskedBits(Op.getOperand(0), Mask & ~KnownZero,
1156 KnownZero2, KnownOne2, Depth+1);
1157 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1158 assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
1160 // Output known-1 bits are only known if set in both the LHS & RHS.
1161 KnownOne &= KnownOne2;
1162 // Output known-0 are known to be clear if zero in either the LHS | RHS.
1163 KnownZero |= KnownZero2;
1166 ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne, Depth+1);
1167 ComputeMaskedBits(Op.getOperand(0), Mask & ~KnownOne,
1168 KnownZero2, KnownOne2, Depth+1);
1169 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1170 assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
1172 // Output known-0 bits are only known if clear in both the LHS & RHS.
1173 KnownZero &= KnownZero2;
1174 // Output known-1 are known to be set if set in either the LHS | RHS.
1175 KnownOne |= KnownOne2;
1178 ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne, Depth+1);
1179 ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero2, KnownOne2, Depth+1);
1180 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1181 assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
1183 // Output known-0 bits are known if clear or set in both the LHS & RHS.
1184 APInt KnownZeroOut = (KnownZero & KnownZero2) | (KnownOne & KnownOne2);
1185 // Output known-1 are known to be set if set in only one of the LHS, RHS.
1186 KnownOne = (KnownZero & KnownOne2) | (KnownOne & KnownZero2);
1187 KnownZero = KnownZeroOut;
1191 ComputeMaskedBits(Op.getOperand(2), Mask, KnownZero, KnownOne, Depth+1);
1192 ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero2, KnownOne2, Depth+1);
1193 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1194 assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
1196 // Only known if known in both the LHS and RHS.
1197 KnownOne &= KnownOne2;
1198 KnownZero &= KnownZero2;
1200 case ISD::SELECT_CC:
1201 ComputeMaskedBits(Op.getOperand(3), Mask, KnownZero, KnownOne, Depth+1);
1202 ComputeMaskedBits(Op.getOperand(2), Mask, KnownZero2, KnownOne2, Depth+1);
1203 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1204 assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
1206 // Only known if known in both the LHS and RHS.
1207 KnownOne &= KnownOne2;
1208 KnownZero &= KnownZero2;
1211 // If we know the result of a setcc has the top bits zero, use this info.
1212 if (TLI.getSetCCResultContents() == TargetLowering::ZeroOrOneSetCCResult &&
1214 KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - 1);
1217 // (shl X, C1) & C2 == 0 iff (X & C2 >>u C1) == 0
1218 if (ConstantSDNode *SA = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
1219 ComputeMaskedBits(Op.getOperand(0), Mask.lshr(SA->getValue()),
1220 KnownZero, KnownOne, Depth+1);
1221 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1222 KnownZero <<= SA->getValue();
1223 KnownOne <<= SA->getValue();
1224 // low bits known zero.
1225 KnownZero |= APInt::getLowBitsSet(BitWidth, SA->getValue());
1229 // (ushr X, C1) & C2 == 0 iff (-1 >> C1) & C2 == 0
1230 if (ConstantSDNode *SA = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
1231 unsigned ShAmt = SA->getValue();
1233 ComputeMaskedBits(Op.getOperand(0), (Mask << ShAmt),
1234 KnownZero, KnownOne, Depth+1);
1235 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1236 KnownZero = KnownZero.lshr(ShAmt);
1237 KnownOne = KnownOne.lshr(ShAmt);
1239 APInt HighBits = APInt::getHighBitsSet(BitWidth, ShAmt) & Mask;
1240 KnownZero |= HighBits; // High bits known zero.
1244 if (ConstantSDNode *SA = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
1245 unsigned ShAmt = SA->getValue();
1247 APInt InDemandedMask = (Mask << ShAmt);
1248 // If any of the demanded bits are produced by the sign extension, we also
1249 // demand the input sign bit.
1250 APInt HighBits = APInt::getHighBitsSet(BitWidth, ShAmt) & Mask;
1251 if (HighBits.getBoolValue())
1252 InDemandedMask |= APInt::getSignBit(BitWidth);
1254 ComputeMaskedBits(Op.getOperand(0), InDemandedMask, KnownZero, KnownOne,
1256 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1257 KnownZero = KnownZero.lshr(ShAmt);
1258 KnownOne = KnownOne.lshr(ShAmt);
1260 // Handle the sign bits.
1261 APInt SignBit = APInt::getSignBit(BitWidth);
1262 SignBit = SignBit.lshr(ShAmt); // Adjust to where it is now in the mask.
1264 if (!!(KnownZero & SignBit)) {
1265 KnownZero |= HighBits; // New bits are known zero.
1266 } else if (!!(KnownOne & SignBit)) {
1267 KnownOne |= HighBits; // New bits are known one.
1271 case ISD::SIGN_EXTEND_INREG: {
1272 MVT::ValueType EVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
1273 unsigned EBits = MVT::getSizeInBits(EVT);
1275 // Sign extension. Compute the demanded bits in the result that are not
1276 // present in the input.
1277 APInt NewBits = APInt::getHighBitsSet(BitWidth, BitWidth - EBits) & Mask;
1279 APInt InSignBit = APInt::getSignBit(EBits);
1280 APInt InputDemandedBits = Mask & APInt::getLowBitsSet(BitWidth, EBits);
1282 // If the sign extended bits are demanded, we know that the sign
1284 InSignBit.zext(BitWidth);
1285 if (NewBits.getBoolValue())
1286 InputDemandedBits |= InSignBit;
1288 ComputeMaskedBits(Op.getOperand(0), InputDemandedBits,
1289 KnownZero, KnownOne, Depth+1);
1290 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1292 // If the sign bit of the input is known set or clear, then we know the
1293 // top bits of the result.
1294 if (!!(KnownZero & InSignBit)) { // Input sign bit known clear
1295 KnownZero |= NewBits;
1296 KnownOne &= ~NewBits;
1297 } else if (!!(KnownOne & InSignBit)) { // Input sign bit known set
1298 KnownOne |= NewBits;
1299 KnownZero &= ~NewBits;
1300 } else { // Input sign bit unknown
1301 KnownZero &= ~NewBits;
1302 KnownOne &= ~NewBits;
1309 unsigned LowBits = Log2_32(BitWidth)+1;
1310 KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - LowBits);
1311 KnownOne = APInt(BitWidth, 0);
1315 if (ISD::isZEXTLoad(Op.Val)) {
1316 LoadSDNode *LD = cast<LoadSDNode>(Op);
1317 MVT::ValueType VT = LD->getMemoryVT();
1318 unsigned MemBits = MVT::getSizeInBits(VT);
1319 KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - MemBits) & Mask;
1323 case ISD::ZERO_EXTEND: {
1324 MVT::ValueType InVT = Op.getOperand(0).getValueType();
1325 unsigned InBits = MVT::getSizeInBits(InVT);
1326 APInt NewBits = APInt::getHighBitsSet(BitWidth, BitWidth - InBits) & Mask;
1327 APInt InMask = Mask;
1328 InMask.trunc(InBits);
1329 KnownZero.trunc(InBits);
1330 KnownOne.trunc(InBits);
1331 ComputeMaskedBits(Op.getOperand(0), InMask, KnownZero, KnownOne, Depth+1);
1332 KnownZero.zext(BitWidth);
1333 KnownOne.zext(BitWidth);
1334 KnownZero |= NewBits;
1337 case ISD::SIGN_EXTEND: {
1338 MVT::ValueType InVT = Op.getOperand(0).getValueType();
1339 unsigned InBits = MVT::getSizeInBits(InVT);
1340 APInt InSignBit = APInt::getSignBit(InBits);
1341 APInt NewBits = APInt::getHighBitsSet(BitWidth, BitWidth - InBits) & Mask;
1342 APInt InMask = Mask;
1343 InMask.trunc(InBits);
1345 // If any of the sign extended bits are demanded, we know that the sign
1346 // bit is demanded. Temporarily set this bit in the mask for our callee.
1347 if (NewBits.getBoolValue())
1348 InMask |= InSignBit;
1350 KnownZero.trunc(InBits);
1351 KnownOne.trunc(InBits);
1352 ComputeMaskedBits(Op.getOperand(0), InMask, KnownZero, KnownOne, Depth+1);
1354 // Note if the sign bit is known to be zero or one.
1355 bool SignBitKnownZero = KnownZero.isNegative();
1356 bool SignBitKnownOne = KnownOne.isNegative();
1357 assert(!(SignBitKnownZero && SignBitKnownOne) &&
1358 "Sign bit can't be known to be both zero and one!");
1360 // If the sign bit wasn't actually demanded by our caller, we don't
1361 // want it set in the KnownZero and KnownOne result values. Reset the
1362 // mask and reapply it to the result values.
1364 InMask.trunc(InBits);
1365 KnownZero &= InMask;
1368 KnownZero.zext(BitWidth);
1369 KnownOne.zext(BitWidth);
1371 // If the sign bit is known zero or one, the top bits match.
1372 if (SignBitKnownZero)
1373 KnownZero |= NewBits;
1374 else if (SignBitKnownOne)
1375 KnownOne |= NewBits;
1378 case ISD::ANY_EXTEND: {
1379 MVT::ValueType InVT = Op.getOperand(0).getValueType();
1380 unsigned InBits = MVT::getSizeInBits(InVT);
1381 APInt InMask = Mask;
1382 InMask.trunc(InBits);
1383 KnownZero.trunc(InBits);
1384 KnownOne.trunc(InBits);
1385 ComputeMaskedBits(Op.getOperand(0), InMask, KnownZero, KnownOne, Depth+1);
1386 KnownZero.zext(BitWidth);
1387 KnownOne.zext(BitWidth);
1390 case ISD::TRUNCATE: {
1391 MVT::ValueType InVT = Op.getOperand(0).getValueType();
1392 unsigned InBits = MVT::getSizeInBits(InVT);
1393 APInt InMask = Mask;
1394 InMask.zext(InBits);
1395 KnownZero.zext(InBits);
1396 KnownOne.zext(InBits);
1397 ComputeMaskedBits(Op.getOperand(0), InMask, KnownZero, KnownOne, Depth+1);
1398 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1399 KnownZero.trunc(BitWidth);
1400 KnownOne.trunc(BitWidth);
1403 case ISD::AssertZext: {
1404 MVT::ValueType VT = cast<VTSDNode>(Op.getOperand(1))->getVT();
1405 APInt InMask = APInt::getLowBitsSet(BitWidth, MVT::getSizeInBits(VT));
1406 ComputeMaskedBits(Op.getOperand(0), Mask & InMask, KnownZero,
1408 KnownZero |= (~InMask) & Mask;
1412 // All bits are zero except the low bit.
1413 KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - 1);
1417 // If either the LHS or the RHS are Zero, the result is zero.
1418 ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne, Depth+1);
1419 ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero2, KnownOne2, Depth+1);
1420 assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
1421 assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
1423 // Output known-0 bits are known if clear or set in both the low clear bits
1424 // common to both LHS & RHS. For example, 8+(X<<3) is known to have the
1425 // low 3 bits clear.
1426 unsigned KnownZeroOut = std::min(KnownZero.countTrailingOnes(),
1427 KnownZero2.countTrailingOnes());
1429 KnownZero = APInt::getLowBitsSet(BitWidth, KnownZeroOut);
1430 KnownOne = APInt(BitWidth, 0);
1434 ConstantSDNode *CLHS = dyn_cast<ConstantSDNode>(Op.getOperand(0));
1437 // We know that the top bits of C-X are clear if X contains less bits
1438 // than C (i.e. no wrap-around can happen). For example, 20-X is
1439 // positive if we can prove that X is >= 0 and < 16.
1442 if (CLHS->getAPIntValue().isNonNegative()) {
1443 unsigned NLZ = (CLHS->getAPIntValue()+1).countLeadingZeros();
1444 // NLZ can't be BitWidth with no sign bit
1445 APInt MaskV = APInt::getHighBitsSet(BitWidth, NLZ);
1446 ComputeMaskedBits(Op.getOperand(1), MaskV, KnownZero, KnownOne, Depth+1);
1448 // If all of the MaskV bits are known to be zero, then we know the output
1449 // top bits are zero, because we now know that the output is from [0-C].
1450 if ((KnownZero & MaskV) == MaskV) {
1451 unsigned NLZ2 = CLHS->getAPIntValue().countLeadingZeros();
1452 // Top bits known zero.
1453 KnownZero = APInt::getHighBitsSet(BitWidth, NLZ2) & Mask;
1454 KnownOne = APInt(BitWidth, 0); // No one bits known.
1456 KnownZero = KnownOne = APInt(BitWidth, 0); // Otherwise, nothing known.
1462 // Allow the target to implement this method for its nodes.
1463 if (Op.getOpcode() >= ISD::BUILTIN_OP_END) {
1464 case ISD::INTRINSIC_WO_CHAIN:
1465 case ISD::INTRINSIC_W_CHAIN:
1466 case ISD::INTRINSIC_VOID:
1467 TLI.computeMaskedBitsForTargetNode(Op, Mask, KnownZero, KnownOne, *this);
1473 /// ComputeMaskedBits - This is a wrapper around the APInt-using
1474 /// form of ComputeMaskedBits for use by clients that haven't been converted
1476 void SelectionDAG::ComputeMaskedBits(SDOperand Op, uint64_t Mask,
1477 uint64_t &KnownZero, uint64_t &KnownOne,
1478 unsigned Depth) const {
1479 // The masks are not wide enough to represent this type! Should use APInt.
1480 if (Op.getValueType() == MVT::i128)
1483 unsigned NumBits = MVT::getSizeInBits(Op.getValueType());
1484 APInt APIntMask(NumBits, Mask);
1485 APInt APIntKnownZero(NumBits, 0);
1486 APInt APIntKnownOne(NumBits, 0);
1487 ComputeMaskedBits(Op, APIntMask, APIntKnownZero, APIntKnownOne, Depth);
1488 KnownZero = APIntKnownZero.getZExtValue();
1489 KnownOne = APIntKnownOne.getZExtValue();
1492 /// ComputeNumSignBits - Return the number of times the sign bit of the
1493 /// register is replicated into the other bits. We know that at least 1 bit
1494 /// is always equal to the sign bit (itself), but other cases can give us
1495 /// information. For example, immediately after an "SRA X, 2", we know that
1496 /// the top 3 bits are all equal to each other, so we return 3.
1497 unsigned SelectionDAG::ComputeNumSignBits(SDOperand Op, unsigned Depth) const{
1498 MVT::ValueType VT = Op.getValueType();
1499 assert(MVT::isInteger(VT) && "Invalid VT!");
1500 unsigned VTBits = MVT::getSizeInBits(VT);
1504 return 1; // Limit search depth.
1506 switch (Op.getOpcode()) {
1508 case ISD::AssertSext:
1509 Tmp = MVT::getSizeInBits(cast<VTSDNode>(Op.getOperand(1))->getVT());
1510 return VTBits-Tmp+1;
1511 case ISD::AssertZext:
1512 Tmp = MVT::getSizeInBits(cast<VTSDNode>(Op.getOperand(1))->getVT());
1515 case ISD::Constant: {
1516 uint64_t Val = cast<ConstantSDNode>(Op)->getValue();
1517 // If negative, invert the bits, then look at it.
1518 if (Val & MVT::getIntVTSignBit(VT))
1521 // Shift the bits so they are the leading bits in the int64_t.
1524 // Return # leading zeros. We use 'min' here in case Val was zero before
1525 // shifting. We don't want to return '64' as for an i32 "0".
1526 return std::min(VTBits, CountLeadingZeros_64(Val));
1529 case ISD::SIGN_EXTEND:
1530 Tmp = VTBits-MVT::getSizeInBits(Op.getOperand(0).getValueType());
1531 return ComputeNumSignBits(Op.getOperand(0), Depth+1) + Tmp;
1533 case ISD::SIGN_EXTEND_INREG:
1534 // Max of the input and what this extends.
1535 Tmp = MVT::getSizeInBits(cast<VTSDNode>(Op.getOperand(1))->getVT());
1538 Tmp2 = ComputeNumSignBits(Op.getOperand(0), Depth+1);
1539 return std::max(Tmp, Tmp2);
1542 Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
1543 // SRA X, C -> adds C sign bits.
1544 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
1545 Tmp += C->getValue();
1546 if (Tmp > VTBits) Tmp = VTBits;
1550 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
1551 // shl destroys sign bits.
1552 Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
1553 if (C->getValue() >= VTBits || // Bad shift.
1554 C->getValue() >= Tmp) break; // Shifted all sign bits out.
1555 return Tmp - C->getValue();
1560 case ISD::XOR: // NOT is handled here.
1561 // Logical binary ops preserve the number of sign bits.
1562 Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
1563 if (Tmp == 1) return 1; // Early out.
1564 Tmp2 = ComputeNumSignBits(Op.getOperand(1), Depth+1);
1565 return std::min(Tmp, Tmp2);
1568 Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
1569 if (Tmp == 1) return 1; // Early out.
1570 Tmp2 = ComputeNumSignBits(Op.getOperand(1), Depth+1);
1571 return std::min(Tmp, Tmp2);
1574 // If setcc returns 0/-1, all bits are sign bits.
1575 if (TLI.getSetCCResultContents() ==
1576 TargetLowering::ZeroOrNegativeOneSetCCResult)
1581 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
1582 unsigned RotAmt = C->getValue() & (VTBits-1);
1584 // Handle rotate right by N like a rotate left by 32-N.
1585 if (Op.getOpcode() == ISD::ROTR)
1586 RotAmt = (VTBits-RotAmt) & (VTBits-1);
1588 // If we aren't rotating out all of the known-in sign bits, return the
1589 // number that are left. This handles rotl(sext(x), 1) for example.
1590 Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
1591 if (Tmp > RotAmt+1) return Tmp-RotAmt;
1595 // Add can have at most one carry bit. Thus we know that the output
1596 // is, at worst, one more bit than the inputs.
1597 Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
1598 if (Tmp == 1) return 1; // Early out.
1600 // Special case decrementing a value (ADD X, -1):
1601 if (ConstantSDNode *CRHS = dyn_cast<ConstantSDNode>(Op.getOperand(0)))
1602 if (CRHS->isAllOnesValue()) {
1603 uint64_t KnownZero, KnownOne;
1604 uint64_t Mask = MVT::getIntVTBitMask(VT);
1605 ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero, KnownOne, Depth+1);
1607 // If the input is known to be 0 or 1, the output is 0/-1, which is all
1609 if ((KnownZero|1) == Mask)
1612 // If we are subtracting one from a positive number, there is no carry
1613 // out of the result.
1614 if (KnownZero & MVT::getIntVTSignBit(VT))
1618 Tmp2 = ComputeNumSignBits(Op.getOperand(1), Depth+1);
1619 if (Tmp2 == 1) return 1;
1620 return std::min(Tmp, Tmp2)-1;
1624 Tmp2 = ComputeNumSignBits(Op.getOperand(1), Depth+1);
1625 if (Tmp2 == 1) return 1;
1628 if (ConstantSDNode *CLHS = dyn_cast<ConstantSDNode>(Op.getOperand(0)))
1629 if (CLHS->getValue() == 0) {
1630 uint64_t KnownZero, KnownOne;
1631 uint64_t Mask = MVT::getIntVTBitMask(VT);
1632 ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne, Depth+1);
1633 // If the input is known to be 0 or 1, the output is 0/-1, which is all
1635 if ((KnownZero|1) == Mask)
1638 // If the input is known to be positive (the sign bit is known clear),
1639 // the output of the NEG has the same number of sign bits as the input.
1640 if (KnownZero & MVT::getIntVTSignBit(VT))
1643 // Otherwise, we treat this like a SUB.
1646 // Sub can have at most one carry bit. Thus we know that the output
1647 // is, at worst, one more bit than the inputs.
1648 Tmp = ComputeNumSignBits(Op.getOperand(0), Depth+1);
1649 if (Tmp == 1) return 1; // Early out.
1650 return std::min(Tmp, Tmp2)-1;
1653 // FIXME: it's tricky to do anything useful for this, but it is an important
1654 // case for targets like X86.
1658 // Handle LOADX separately here. EXTLOAD case will fallthrough.
1659 if (Op.getOpcode() == ISD::LOAD) {
1660 LoadSDNode *LD = cast<LoadSDNode>(Op);
1661 unsigned ExtType = LD->getExtensionType();
1664 case ISD::SEXTLOAD: // '17' bits known
1665 Tmp = MVT::getSizeInBits(LD->getMemoryVT());
1666 return VTBits-Tmp+1;
1667 case ISD::ZEXTLOAD: // '16' bits known
1668 Tmp = MVT::getSizeInBits(LD->getMemoryVT());
1673 // Allow the target to implement this method for its nodes.
1674 if (Op.getOpcode() >= ISD::BUILTIN_OP_END ||
1675 Op.getOpcode() == ISD::INTRINSIC_WO_CHAIN ||
1676 Op.getOpcode() == ISD::INTRINSIC_W_CHAIN ||
1677 Op.getOpcode() == ISD::INTRINSIC_VOID) {
1678 unsigned NumBits = TLI.ComputeNumSignBitsForTargetNode(Op, Depth);
1679 if (NumBits > 1) return NumBits;
1682 // Finally, if we can prove that the top bits of the result are 0's or 1's,
1683 // use this information.
1684 uint64_t KnownZero, KnownOne;
1685 uint64_t Mask = MVT::getIntVTBitMask(VT);
1686 ComputeMaskedBits(Op, Mask, KnownZero, KnownOne, Depth);
1688 uint64_t SignBit = MVT::getIntVTSignBit(VT);
1689 if (KnownZero & SignBit) { // SignBit is 0
1691 } else if (KnownOne & SignBit) { // SignBit is 1;
1698 // Okay, we know that the sign bit in Mask is set. Use CLZ to determine
1699 // the number of identical bits in the top of the input value.
1702 // Return # leading zeros. We use 'min' here in case Val was zero before
1703 // shifting. We don't want to return '64' as for an i32 "0".
1704 return std::min(VTBits, CountLeadingZeros_64(Mask));
1708 bool SelectionDAG::isVerifiedDebugInfoDesc(SDOperand Op) const {
1709 GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Op);
1710 if (!GA) return false;
1711 GlobalVariable *GV = dyn_cast<GlobalVariable>(GA->getGlobal());
1712 if (!GV) return false;
1713 MachineModuleInfo *MMI = getMachineModuleInfo();
1714 return MMI && MMI->hasDebugInfo() && MMI->isVerified(GV);
1718 /// getNode - Gets or creates the specified node.
1720 SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT) {
1721 FoldingSetNodeID ID;
1722 AddNodeIDNode(ID, Opcode, getVTList(VT), 0, 0);
1724 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
1725 return SDOperand(E, 0);
1726 SDNode *N = new SDNode(Opcode, SDNode::getSDVTList(VT));
1727 CSEMap.InsertNode(N, IP);
1729 AllNodes.push_back(N);
1730 return SDOperand(N, 0);
1733 SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
1734 SDOperand Operand) {
1736 // Constant fold unary operations with an integer constant operand.
1737 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Operand.Val)) {
1738 uint64_t Val = C->getValue();
1741 case ISD::SIGN_EXTEND: return getConstant(C->getSignExtended(), VT);
1742 case ISD::ANY_EXTEND:
1743 case ISD::ZERO_EXTEND: return getConstant(Val, VT);
1744 case ISD::TRUNCATE: return getConstant(Val, VT);
1745 case ISD::UINT_TO_FP:
1746 case ISD::SINT_TO_FP: {
1747 const uint64_t zero[] = {0, 0};
1748 // No compile time operations on this type.
1749 if (VT==MVT::ppcf128)
1751 APFloat apf = APFloat(APInt(MVT::getSizeInBits(VT), 2, zero));
1752 (void)apf.convertFromZeroExtendedInteger(&Val,
1753 MVT::getSizeInBits(Operand.getValueType()),
1754 Opcode==ISD::SINT_TO_FP,
1755 APFloat::rmNearestTiesToEven);
1756 return getConstantFP(apf, VT);
1758 case ISD::BIT_CONVERT:
1759 if (VT == MVT::f32 && C->getValueType(0) == MVT::i32)
1760 return getConstantFP(BitsToFloat(Val), VT);
1761 else if (VT == MVT::f64 && C->getValueType(0) == MVT::i64)
1762 return getConstantFP(BitsToDouble(Val), VT);
1766 default: assert(0 && "Invalid bswap!"); break;
1767 case MVT::i16: return getConstant(ByteSwap_16((unsigned short)Val), VT);
1768 case MVT::i32: return getConstant(ByteSwap_32((unsigned)Val), VT);
1769 case MVT::i64: return getConstant(ByteSwap_64(Val), VT);
1774 default: assert(0 && "Invalid ctpop!"); break;
1775 case MVT::i1: return getConstant(Val != 0, VT);
1777 Tmp1 = (unsigned)Val & 0xFF;
1778 return getConstant(CountPopulation_32(Tmp1), VT);
1780 Tmp1 = (unsigned)Val & 0xFFFF;
1781 return getConstant(CountPopulation_32(Tmp1), VT);
1783 return getConstant(CountPopulation_32((unsigned)Val), VT);
1785 return getConstant(CountPopulation_64(Val), VT);
1789 default: assert(0 && "Invalid ctlz!"); break;
1790 case MVT::i1: return getConstant(Val == 0, VT);
1792 Tmp1 = (unsigned)Val & 0xFF;
1793 return getConstant(CountLeadingZeros_32(Tmp1)-24, VT);
1795 Tmp1 = (unsigned)Val & 0xFFFF;
1796 return getConstant(CountLeadingZeros_32(Tmp1)-16, VT);
1798 return getConstant(CountLeadingZeros_32((unsigned)Val), VT);
1800 return getConstant(CountLeadingZeros_64(Val), VT);
1804 default: assert(0 && "Invalid cttz!"); break;
1805 case MVT::i1: return getConstant(Val == 0, VT);
1807 Tmp1 = (unsigned)Val | 0x100;
1808 return getConstant(CountTrailingZeros_32(Tmp1), VT);
1810 Tmp1 = (unsigned)Val | 0x10000;
1811 return getConstant(CountTrailingZeros_32(Tmp1), VT);
1813 return getConstant(CountTrailingZeros_32((unsigned)Val), VT);
1815 return getConstant(CountTrailingZeros_64(Val), VT);
1820 // Constant fold unary operations with a floating point constant operand.
1821 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(Operand.Val)) {
1822 APFloat V = C->getValueAPF(); // make copy
1823 if (VT != MVT::ppcf128 && Operand.getValueType() != MVT::ppcf128) {
1827 return getConstantFP(V, VT);
1830 return getConstantFP(V, VT);
1832 case ISD::FP_EXTEND:
1833 // This can return overflow, underflow, or inexact; we don't care.
1834 // FIXME need to be more flexible about rounding mode.
1835 (void) V.convert(VT==MVT::f32 ? APFloat::IEEEsingle :
1836 VT==MVT::f64 ? APFloat::IEEEdouble :
1837 VT==MVT::f80 ? APFloat::x87DoubleExtended :
1838 VT==MVT::f128 ? APFloat::IEEEquad :
1840 APFloat::rmNearestTiesToEven);
1841 return getConstantFP(V, VT);
1842 case ISD::FP_TO_SINT:
1843 case ISD::FP_TO_UINT: {
1845 assert(integerPartWidth >= 64);
1846 // FIXME need to be more flexible about rounding mode.
1847 APFloat::opStatus s = V.convertToInteger(&x, 64U,
1848 Opcode==ISD::FP_TO_SINT,
1849 APFloat::rmTowardZero);
1850 if (s==APFloat::opInvalidOp) // inexact is OK, in fact usual
1852 return getConstant(x, VT);
1854 case ISD::BIT_CONVERT:
1855 if (VT == MVT::i32 && C->getValueType(0) == MVT::f32)
1856 return getConstant((uint32_t)V.convertToAPInt().getZExtValue(), VT);
1857 else if (VT == MVT::i64 && C->getValueType(0) == MVT::f64)
1858 return getConstant(V.convertToAPInt().getZExtValue(), VT);
1864 unsigned OpOpcode = Operand.Val->getOpcode();
1866 case ISD::TokenFactor:
1867 return Operand; // Factor of one node? No factor.
1868 case ISD::FP_ROUND: assert(0 && "Invalid method to make FP_ROUND node");
1869 case ISD::FP_EXTEND:
1870 assert(MVT::isFloatingPoint(VT) &&
1871 MVT::isFloatingPoint(Operand.getValueType()) && "Invalid FP cast!");
1872 if (Operand.getValueType() == VT) return Operand; // noop conversion.
1874 case ISD::SIGN_EXTEND:
1875 assert(MVT::isInteger(VT) && MVT::isInteger(Operand.getValueType()) &&
1876 "Invalid SIGN_EXTEND!");
1877 if (Operand.getValueType() == VT) return Operand; // noop extension
1878 assert(MVT::getSizeInBits(Operand.getValueType()) < MVT::getSizeInBits(VT)
1879 && "Invalid sext node, dst < src!");
1880 if (OpOpcode == ISD::SIGN_EXTEND || OpOpcode == ISD::ZERO_EXTEND)
1881 return getNode(OpOpcode, VT, Operand.Val->getOperand(0));
1883 case ISD::ZERO_EXTEND:
1884 assert(MVT::isInteger(VT) && MVT::isInteger(Operand.getValueType()) &&
1885 "Invalid ZERO_EXTEND!");
1886 if (Operand.getValueType() == VT) return Operand; // noop extension
1887 assert(MVT::getSizeInBits(Operand.getValueType()) < MVT::getSizeInBits(VT)
1888 && "Invalid zext node, dst < src!");
1889 if (OpOpcode == ISD::ZERO_EXTEND) // (zext (zext x)) -> (zext x)
1890 return getNode(ISD::ZERO_EXTEND, VT, Operand.Val->getOperand(0));
1892 case ISD::ANY_EXTEND:
1893 assert(MVT::isInteger(VT) && MVT::isInteger(Operand.getValueType()) &&
1894 "Invalid ANY_EXTEND!");
1895 if (Operand.getValueType() == VT) return Operand; // noop extension
1896 assert(MVT::getSizeInBits(Operand.getValueType()) < MVT::getSizeInBits(VT)
1897 && "Invalid anyext node, dst < src!");
1898 if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND)
1899 // (ext (zext x)) -> (zext x) and (ext (sext x)) -> (sext x)
1900 return getNode(OpOpcode, VT, Operand.Val->getOperand(0));
1903 assert(MVT::isInteger(VT) && MVT::isInteger(Operand.getValueType()) &&
1904 "Invalid TRUNCATE!");
1905 if (Operand.getValueType() == VT) return Operand; // noop truncate
1906 assert(MVT::getSizeInBits(Operand.getValueType()) > MVT::getSizeInBits(VT)
1907 && "Invalid truncate node, src < dst!");
1908 if (OpOpcode == ISD::TRUNCATE)
1909 return getNode(ISD::TRUNCATE, VT, Operand.Val->getOperand(0));
1910 else if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND ||
1911 OpOpcode == ISD::ANY_EXTEND) {
1912 // If the source is smaller than the dest, we still need an extend.
1913 if (MVT::getSizeInBits(Operand.Val->getOperand(0).getValueType())
1914 < MVT::getSizeInBits(VT))
1915 return getNode(OpOpcode, VT, Operand.Val->getOperand(0));
1916 else if (MVT::getSizeInBits(Operand.Val->getOperand(0).getValueType())
1917 > MVT::getSizeInBits(VT))
1918 return getNode(ISD::TRUNCATE, VT, Operand.Val->getOperand(0));
1920 return Operand.Val->getOperand(0);
1923 case ISD::BIT_CONVERT:
1924 // Basic sanity checking.
1925 assert(MVT::getSizeInBits(VT) == MVT::getSizeInBits(Operand.getValueType())
1926 && "Cannot BIT_CONVERT between types of different sizes!");
1927 if (VT == Operand.getValueType()) return Operand; // noop conversion.
1928 if (OpOpcode == ISD::BIT_CONVERT) // bitconv(bitconv(x)) -> bitconv(x)
1929 return getNode(ISD::BIT_CONVERT, VT, Operand.getOperand(0));
1930 if (OpOpcode == ISD::UNDEF)
1931 return getNode(ISD::UNDEF, VT);
1933 case ISD::SCALAR_TO_VECTOR:
1934 assert(MVT::isVector(VT) && !MVT::isVector(Operand.getValueType()) &&
1935 MVT::getVectorElementType(VT) == Operand.getValueType() &&
1936 "Illegal SCALAR_TO_VECTOR node!");
1939 if (OpOpcode == ISD::FSUB) // -(X-Y) -> (Y-X)
1940 return getNode(ISD::FSUB, VT, Operand.Val->getOperand(1),
1941 Operand.Val->getOperand(0));
1942 if (OpOpcode == ISD::FNEG) // --X -> X
1943 return Operand.Val->getOperand(0);
1946 if (OpOpcode == ISD::FNEG) // abs(-X) -> abs(X)
1947 return getNode(ISD::FABS, VT, Operand.Val->getOperand(0));
1952 SDVTList VTs = getVTList(VT);
1953 if (VT != MVT::Flag) { // Don't CSE flag producing nodes
1954 FoldingSetNodeID ID;
1955 SDOperand Ops[1] = { Operand };
1956 AddNodeIDNode(ID, Opcode, VTs, Ops, 1);
1958 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
1959 return SDOperand(E, 0);
1960 N = new UnarySDNode(Opcode, VTs, Operand);
1961 CSEMap.InsertNode(N, IP);
1963 N = new UnarySDNode(Opcode, VTs, Operand);
1965 AllNodes.push_back(N);
1966 return SDOperand(N, 0);
1971 SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
1972 SDOperand N1, SDOperand N2) {
1973 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val);
1974 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val);
1977 case ISD::TokenFactor:
1978 assert(VT == MVT::Other && N1.getValueType() == MVT::Other &&
1979 N2.getValueType() == MVT::Other && "Invalid token factor!");
1980 // Fold trivial token factors.
1981 if (N1.getOpcode() == ISD::EntryToken) return N2;
1982 if (N2.getOpcode() == ISD::EntryToken) return N1;
1985 assert(MVT::isInteger(VT) && N1.getValueType() == N2.getValueType() &&
1986 N1.getValueType() == VT && "Binary operator types must match!");
1987 // (X & 0) -> 0. This commonly occurs when legalizing i64 values, so it's
1988 // worth handling here.
1989 if (N2C && N2C->getValue() == 0)
1991 if (N2C && N2C->isAllOnesValue()) // X & -1 -> X
1996 assert(MVT::isInteger(VT) && N1.getValueType() == N2.getValueType() &&
1997 N1.getValueType() == VT && "Binary operator types must match!");
1998 // (X ^| 0) -> X. This commonly occurs when legalizing i64 values, so it's
1999 // worth handling here.
2000 if (N2C && N2C->getValue() == 0)
2007 assert(MVT::isInteger(VT) && "This operator does not apply to FP types!");
2019 assert(N1.getValueType() == N2.getValueType() &&
2020 N1.getValueType() == VT && "Binary operator types must match!");
2022 case ISD::FCOPYSIGN: // N1 and result must match. N1/N2 need not match.
2023 assert(N1.getValueType() == VT &&
2024 MVT::isFloatingPoint(N1.getValueType()) &&
2025 MVT::isFloatingPoint(N2.getValueType()) &&
2026 "Invalid FCOPYSIGN!");
2033 assert(VT == N1.getValueType() &&
2034 "Shift operators return type must be the same as their first arg");
2035 assert(MVT::isInteger(VT) && MVT::isInteger(N2.getValueType()) &&
2036 VT != MVT::i1 && "Shifts only work on integers");
2038 case ISD::FP_ROUND_INREG: {
2039 MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT();
2040 assert(VT == N1.getValueType() && "Not an inreg round!");
2041 assert(MVT::isFloatingPoint(VT) && MVT::isFloatingPoint(EVT) &&
2042 "Cannot FP_ROUND_INREG integer types");
2043 assert(MVT::getSizeInBits(EVT) <= MVT::getSizeInBits(VT) &&
2044 "Not rounding down!");
2045 if (cast<VTSDNode>(N2)->getVT() == VT) return N1; // Not actually rounding.
2049 assert(MVT::isFloatingPoint(VT) &&
2050 MVT::isFloatingPoint(N1.getValueType()) &&
2051 MVT::getSizeInBits(VT) <= MVT::getSizeInBits(N1.getValueType()) &&
2052 isa<ConstantSDNode>(N2) && "Invalid FP_ROUND!");
2053 if (N1.getValueType() == VT) return N1; // noop conversion.
2055 case ISD::AssertSext:
2056 case ISD::AssertZext: {
2057 MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT();
2058 assert(VT == N1.getValueType() && "Not an inreg extend!");
2059 assert(MVT::isInteger(VT) && MVT::isInteger(EVT) &&
2060 "Cannot *_EXTEND_INREG FP types");
2061 assert(MVT::getSizeInBits(EVT) <= MVT::getSizeInBits(VT) &&
2063 if (VT == EVT) return N1; // noop assertion.
2066 case ISD::SIGN_EXTEND_INREG: {
2067 MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT();
2068 assert(VT == N1.getValueType() && "Not an inreg extend!");
2069 assert(MVT::isInteger(VT) && MVT::isInteger(EVT) &&
2070 "Cannot *_EXTEND_INREG FP types");
2071 assert(MVT::getSizeInBits(EVT) <= MVT::getSizeInBits(VT) &&
2073 if (EVT == VT) return N1; // Not actually extending
2076 int64_t Val = N1C->getValue();
2077 unsigned FromBits = MVT::getSizeInBits(cast<VTSDNode>(N2)->getVT());
2078 Val <<= 64-FromBits;
2079 Val >>= 64-FromBits;
2080 return getConstant(Val, VT);
2084 case ISD::EXTRACT_VECTOR_ELT:
2085 assert(N2C && "Bad EXTRACT_VECTOR_ELT!");
2087 // EXTRACT_VECTOR_ELT of CONCAT_VECTORS is often formed while lowering is
2088 // expanding copies of large vectors from registers.
2089 if (N1.getOpcode() == ISD::CONCAT_VECTORS &&
2090 N1.getNumOperands() > 0) {
2092 MVT::getVectorNumElements(N1.getOperand(0).getValueType());
2093 return getNode(ISD::EXTRACT_VECTOR_ELT, VT,
2094 N1.getOperand(N2C->getValue() / Factor),
2095 getConstant(N2C->getValue() % Factor, N2.getValueType()));
2098 // EXTRACT_VECTOR_ELT of BUILD_VECTOR is often formed while lowering is
2099 // expanding large vector constants.
2100 if (N1.getOpcode() == ISD::BUILD_VECTOR)
2101 return N1.getOperand(N2C->getValue());
2103 // EXTRACT_VECTOR_ELT of INSERT_VECTOR_ELT is often formed when vector
2104 // operations are lowered to scalars.
2105 if (N1.getOpcode() == ISD::INSERT_VECTOR_ELT)
2106 if (ConstantSDNode *IEC = dyn_cast<ConstantSDNode>(N1.getOperand(2))) {
2108 return N1.getOperand(1);
2110 return getNode(ISD::EXTRACT_VECTOR_ELT, VT, N1.getOperand(0), N2);
2113 case ISD::EXTRACT_ELEMENT:
2114 assert(N2C && (unsigned)N2C->getValue() < 2 && "Bad EXTRACT_ELEMENT!");
2116 // EXTRACT_ELEMENT of BUILD_PAIR is often formed while legalize is expanding
2117 // 64-bit integers into 32-bit parts. Instead of building the extract of
2118 // the BUILD_PAIR, only to have legalize rip it apart, just do it now.
2119 if (N1.getOpcode() == ISD::BUILD_PAIR)
2120 return N1.getOperand(N2C->getValue());
2122 // EXTRACT_ELEMENT of a constant int is also very common.
2123 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N1)) {
2124 unsigned Shift = MVT::getSizeInBits(VT) * N2C->getValue();
2125 return getConstant(C->getValue() >> Shift, VT);
2132 uint64_t C1 = N1C->getValue(), C2 = N2C->getValue();
2134 case ISD::ADD: return getConstant(C1 + C2, VT);
2135 case ISD::SUB: return getConstant(C1 - C2, VT);
2136 case ISD::MUL: return getConstant(C1 * C2, VT);
2138 if (C2) return getConstant(C1 / C2, VT);
2141 if (C2) return getConstant(C1 % C2, VT);
2144 if (C2) return getConstant(N1C->getSignExtended() /
2145 N2C->getSignExtended(), VT);
2148 if (C2) return getConstant(N1C->getSignExtended() %
2149 N2C->getSignExtended(), VT);
2151 case ISD::AND : return getConstant(C1 & C2, VT);
2152 case ISD::OR : return getConstant(C1 | C2, VT);
2153 case ISD::XOR : return getConstant(C1 ^ C2, VT);
2154 case ISD::SHL : return getConstant(C1 << C2, VT);
2155 case ISD::SRL : return getConstant(C1 >> C2, VT);
2156 case ISD::SRA : return getConstant(N1C->getSignExtended() >>(int)C2, VT);
2158 return getConstant((C1 << C2) | (C1 >> (MVT::getSizeInBits(VT) - C2)),
2161 return getConstant((C1 >> C2) | (C1 << (MVT::getSizeInBits(VT) - C2)),
2165 } else { // Cannonicalize constant to RHS if commutative
2166 if (isCommutativeBinOp(Opcode)) {
2167 std::swap(N1C, N2C);
2173 // Constant fold FP operations.
2174 ConstantFPSDNode *N1CFP = dyn_cast<ConstantFPSDNode>(N1.Val);
2175 ConstantFPSDNode *N2CFP = dyn_cast<ConstantFPSDNode>(N2.Val);
2177 if (!N2CFP && isCommutativeBinOp(Opcode)) {
2178 // Cannonicalize constant to RHS if commutative
2179 std::swap(N1CFP, N2CFP);
2181 } else if (N2CFP && VT != MVT::ppcf128) {
2182 APFloat V1 = N1CFP->getValueAPF(), V2 = N2CFP->getValueAPF();
2183 APFloat::opStatus s;
2186 s = V1.add(V2, APFloat::rmNearestTiesToEven);
2187 if (s != APFloat::opInvalidOp)
2188 return getConstantFP(V1, VT);
2191 s = V1.subtract(V2, APFloat::rmNearestTiesToEven);
2192 if (s!=APFloat::opInvalidOp)
2193 return getConstantFP(V1, VT);
2196 s = V1.multiply(V2, APFloat::rmNearestTiesToEven);
2197 if (s!=APFloat::opInvalidOp)
2198 return getConstantFP(V1, VT);
2201 s = V1.divide(V2, APFloat::rmNearestTiesToEven);
2202 if (s!=APFloat::opInvalidOp && s!=APFloat::opDivByZero)
2203 return getConstantFP(V1, VT);
2206 s = V1.mod(V2, APFloat::rmNearestTiesToEven);
2207 if (s!=APFloat::opInvalidOp && s!=APFloat::opDivByZero)
2208 return getConstantFP(V1, VT);
2210 case ISD::FCOPYSIGN:
2212 return getConstantFP(V1, VT);
2218 // Canonicalize an UNDEF to the RHS, even over a constant.
2219 if (N1.getOpcode() == ISD::UNDEF) {
2220 if (isCommutativeBinOp(Opcode)) {
2224 case ISD::FP_ROUND_INREG:
2225 case ISD::SIGN_EXTEND_INREG:
2231 return N1; // fold op(undef, arg2) -> undef
2238 if (!MVT::isVector(VT))
2239 return getConstant(0, VT); // fold op(undef, arg2) -> 0
2240 // For vectors, we can't easily build an all zero vector, just return
2247 // Fold a bunch of operators when the RHS is undef.
2248 if (N2.getOpcode() == ISD::UNDEF) {
2264 return N2; // fold op(arg1, undef) -> undef
2269 if (!MVT::isVector(VT))
2270 return getConstant(0, VT); // fold op(arg1, undef) -> 0
2271 // For vectors, we can't easily build an all zero vector, just return
2275 if (!MVT::isVector(VT))
2276 return getConstant(MVT::getIntVTBitMask(VT), VT);
2277 // For vectors, we can't easily build an all one vector, just return
2285 // Memoize this node if possible.
2287 SDVTList VTs = getVTList(VT);
2288 if (VT != MVT::Flag) {
2289 SDOperand Ops[] = { N1, N2 };
2290 FoldingSetNodeID ID;
2291 AddNodeIDNode(ID, Opcode, VTs, Ops, 2);
2293 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
2294 return SDOperand(E, 0);
2295 N = new BinarySDNode(Opcode, VTs, N1, N2);
2296 CSEMap.InsertNode(N, IP);
2298 N = new BinarySDNode(Opcode, VTs, N1, N2);
2301 AllNodes.push_back(N);
2302 return SDOperand(N, 0);
2305 SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
2306 SDOperand N1, SDOperand N2, SDOperand N3) {
2307 // Perform various simplifications.
2308 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val);
2309 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val);
2312 // Use FoldSetCC to simplify SETCC's.
2313 SDOperand Simp = FoldSetCC(VT, N1, N2, cast<CondCodeSDNode>(N3)->get());
2314 if (Simp.Val) return Simp;
2319 if (N1C->getValue())
2320 return N2; // select true, X, Y -> X
2322 return N3; // select false, X, Y -> Y
2324 if (N2 == N3) return N2; // select C, X, X -> X
2328 if (N2C->getValue()) // Unconditional branch
2329 return getNode(ISD::BR, MVT::Other, N1, N3);
2331 return N1; // Never-taken branch
2333 case ISD::VECTOR_SHUFFLE:
2334 assert(VT == N1.getValueType() && VT == N2.getValueType() &&
2335 MVT::isVector(VT) && MVT::isVector(N3.getValueType()) &&
2336 N3.getOpcode() == ISD::BUILD_VECTOR &&
2337 MVT::getVectorNumElements(VT) == N3.getNumOperands() &&
2338 "Illegal VECTOR_SHUFFLE node!");
2340 case ISD::BIT_CONVERT:
2341 // Fold bit_convert nodes from a type to themselves.
2342 if (N1.getValueType() == VT)
2347 // Memoize node if it doesn't produce a flag.
2349 SDVTList VTs = getVTList(VT);
2350 if (VT != MVT::Flag) {
2351 SDOperand Ops[] = { N1, N2, N3 };
2352 FoldingSetNodeID ID;
2353 AddNodeIDNode(ID, Opcode, VTs, Ops, 3);
2355 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
2356 return SDOperand(E, 0);
2357 N = new TernarySDNode(Opcode, VTs, N1, N2, N3);
2358 CSEMap.InsertNode(N, IP);
2360 N = new TernarySDNode(Opcode, VTs, N1, N2, N3);
2362 AllNodes.push_back(N);
2363 return SDOperand(N, 0);
2366 SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
2367 SDOperand N1, SDOperand N2, SDOperand N3,
2369 SDOperand Ops[] = { N1, N2, N3, N4 };
2370 return getNode(Opcode, VT, Ops, 4);
2373 SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
2374 SDOperand N1, SDOperand N2, SDOperand N3,
2375 SDOperand N4, SDOperand N5) {
2376 SDOperand Ops[] = { N1, N2, N3, N4, N5 };
2377 return getNode(Opcode, VT, Ops, 5);
2380 SDOperand SelectionDAG::getMemcpy(SDOperand Chain, SDOperand Dest,
2381 SDOperand Src, SDOperand Size,
2383 SDOperand AlwaysInline) {
2384 SDOperand Ops[] = { Chain, Dest, Src, Size, Align, AlwaysInline };
2385 return getNode(ISD::MEMCPY, MVT::Other, Ops, 6);
2388 SDOperand SelectionDAG::getMemmove(SDOperand Chain, SDOperand Dest,
2389 SDOperand Src, SDOperand Size,
2391 SDOperand AlwaysInline) {
2392 SDOperand Ops[] = { Chain, Dest, Src, Size, Align, AlwaysInline };
2393 return getNode(ISD::MEMMOVE, MVT::Other, Ops, 6);
2396 SDOperand SelectionDAG::getMemset(SDOperand Chain, SDOperand Dest,
2397 SDOperand Src, SDOperand Size,
2399 SDOperand AlwaysInline) {
2400 SDOperand Ops[] = { Chain, Dest, Src, Size, Align, AlwaysInline };
2401 return getNode(ISD::MEMSET, MVT::Other, Ops, 6);
2404 SDOperand SelectionDAG::getLoad(MVT::ValueType VT,
2405 SDOperand Chain, SDOperand Ptr,
2406 const Value *SV, int SVOffset,
2407 bool isVolatile, unsigned Alignment) {
2408 if (Alignment == 0) { // Ensure that codegen never sees alignment 0
2410 if (VT != MVT::iPTR) {
2411 Ty = MVT::getTypeForValueType(VT);
2413 const PointerType *PT = dyn_cast<PointerType>(SV->getType());
2414 assert(PT && "Value for load must be a pointer");
2415 Ty = PT->getElementType();
2417 assert(Ty && "Could not get type information for load");
2418 Alignment = TLI.getTargetData()->getABITypeAlignment(Ty);
2420 SDVTList VTs = getVTList(VT, MVT::Other);
2421 SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType());
2422 SDOperand Ops[] = { Chain, Ptr, Undef };
2423 FoldingSetNodeID ID;
2424 AddNodeIDNode(ID, ISD::LOAD, VTs, Ops, 3);
2425 ID.AddInteger(ISD::UNINDEXED);
2426 ID.AddInteger(ISD::NON_EXTLOAD);
2427 ID.AddInteger((unsigned int)VT);
2428 ID.AddInteger(Alignment);
2429 ID.AddInteger(isVolatile);
2431 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
2432 return SDOperand(E, 0);
2433 SDNode *N = new LoadSDNode(Ops, VTs, ISD::UNINDEXED,
2434 ISD::NON_EXTLOAD, VT, SV, SVOffset, Alignment,
2436 CSEMap.InsertNode(N, IP);
2437 AllNodes.push_back(N);
2438 return SDOperand(N, 0);
2441 SDOperand SelectionDAG::getExtLoad(ISD::LoadExtType ExtType, MVT::ValueType VT,
2442 SDOperand Chain, SDOperand Ptr,
2444 int SVOffset, MVT::ValueType EVT,
2445 bool isVolatile, unsigned Alignment) {
2446 // If they are asking for an extending load from/to the same thing, return a
2449 return getLoad(VT, Chain, Ptr, SV, SVOffset, isVolatile, Alignment);
2451 if (MVT::isVector(VT))
2452 assert(EVT == MVT::getVectorElementType(VT) && "Invalid vector extload!");
2454 assert(MVT::getSizeInBits(EVT) < MVT::getSizeInBits(VT) &&
2455 "Should only be an extending load, not truncating!");
2456 assert((ExtType == ISD::EXTLOAD || MVT::isInteger(VT)) &&
2457 "Cannot sign/zero extend a FP/Vector load!");
2458 assert(MVT::isInteger(VT) == MVT::isInteger(EVT) &&
2459 "Cannot convert from FP to Int or Int -> FP!");
2461 if (Alignment == 0) { // Ensure that codegen never sees alignment 0
2463 if (VT != MVT::iPTR) {
2464 Ty = MVT::getTypeForValueType(VT);
2466 const PointerType *PT = dyn_cast<PointerType>(SV->getType());
2467 assert(PT && "Value for load must be a pointer");
2468 Ty = PT->getElementType();
2470 assert(Ty && "Could not get type information for load");
2471 Alignment = TLI.getTargetData()->getABITypeAlignment(Ty);
2473 SDVTList VTs = getVTList(VT, MVT::Other);
2474 SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType());
2475 SDOperand Ops[] = { Chain, Ptr, Undef };
2476 FoldingSetNodeID ID;
2477 AddNodeIDNode(ID, ISD::LOAD, VTs, Ops, 3);
2478 ID.AddInteger(ISD::UNINDEXED);
2479 ID.AddInteger(ExtType);
2480 ID.AddInteger((unsigned int)EVT);
2481 ID.AddInteger(Alignment);
2482 ID.AddInteger(isVolatile);
2484 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
2485 return SDOperand(E, 0);
2486 SDNode *N = new LoadSDNode(Ops, VTs, ISD::UNINDEXED, ExtType, EVT,
2487 SV, SVOffset, Alignment, isVolatile);
2488 CSEMap.InsertNode(N, IP);
2489 AllNodes.push_back(N);
2490 return SDOperand(N, 0);
2494 SelectionDAG::getIndexedLoad(SDOperand OrigLoad, SDOperand Base,
2495 SDOperand Offset, ISD::MemIndexedMode AM) {
2496 LoadSDNode *LD = cast<LoadSDNode>(OrigLoad);
2497 assert(LD->getOffset().getOpcode() == ISD::UNDEF &&
2498 "Load is already a indexed load!");
2499 MVT::ValueType VT = OrigLoad.getValueType();
2500 SDVTList VTs = getVTList(VT, Base.getValueType(), MVT::Other);
2501 SDOperand Ops[] = { LD->getChain(), Base, Offset };
2502 FoldingSetNodeID ID;
2503 AddNodeIDNode(ID, ISD::LOAD, VTs, Ops, 3);
2505 ID.AddInteger(LD->getExtensionType());
2506 ID.AddInteger((unsigned int)(LD->getMemoryVT()));
2507 ID.AddInteger(LD->getAlignment());
2508 ID.AddInteger(LD->isVolatile());
2510 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
2511 return SDOperand(E, 0);
2512 SDNode *N = new LoadSDNode(Ops, VTs, AM,
2513 LD->getExtensionType(), LD->getMemoryVT(),
2514 LD->getSrcValue(), LD->getSrcValueOffset(),
2515 LD->getAlignment(), LD->isVolatile());
2516 CSEMap.InsertNode(N, IP);
2517 AllNodes.push_back(N);
2518 return SDOperand(N, 0);
2521 SDOperand SelectionDAG::getStore(SDOperand Chain, SDOperand Val,
2522 SDOperand Ptr, const Value *SV, int SVOffset,
2523 bool isVolatile, unsigned Alignment) {
2524 MVT::ValueType VT = Val.getValueType();
2526 if (Alignment == 0) { // Ensure that codegen never sees alignment 0
2528 if (VT != MVT::iPTR) {
2529 Ty = MVT::getTypeForValueType(VT);
2531 const PointerType *PT = dyn_cast<PointerType>(SV->getType());
2532 assert(PT && "Value for store must be a pointer");
2533 Ty = PT->getElementType();
2535 assert(Ty && "Could not get type information for store");
2536 Alignment = TLI.getTargetData()->getABITypeAlignment(Ty);
2538 SDVTList VTs = getVTList(MVT::Other);
2539 SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType());
2540 SDOperand Ops[] = { Chain, Val, Ptr, Undef };
2541 FoldingSetNodeID ID;
2542 AddNodeIDNode(ID, ISD::STORE, VTs, Ops, 4);
2543 ID.AddInteger(ISD::UNINDEXED);
2544 ID.AddInteger(false);
2545 ID.AddInteger((unsigned int)VT);
2546 ID.AddInteger(Alignment);
2547 ID.AddInteger(isVolatile);
2549 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
2550 return SDOperand(E, 0);
2551 SDNode *N = new StoreSDNode(Ops, VTs, ISD::UNINDEXED, false,
2552 VT, SV, SVOffset, Alignment, isVolatile);
2553 CSEMap.InsertNode(N, IP);
2554 AllNodes.push_back(N);
2555 return SDOperand(N, 0);
2558 SDOperand SelectionDAG::getTruncStore(SDOperand Chain, SDOperand Val,
2559 SDOperand Ptr, const Value *SV,
2560 int SVOffset, MVT::ValueType SVT,
2561 bool isVolatile, unsigned Alignment) {
2562 MVT::ValueType VT = Val.getValueType();
2565 return getStore(Chain, Val, Ptr, SV, SVOffset, isVolatile, Alignment);
2567 assert(MVT::getSizeInBits(VT) > MVT::getSizeInBits(SVT) &&
2568 "Not a truncation?");
2569 assert(MVT::isInteger(VT) == MVT::isInteger(SVT) &&
2570 "Can't do FP-INT conversion!");
2572 if (Alignment == 0) { // Ensure that codegen never sees alignment 0
2574 if (VT != MVT::iPTR) {
2575 Ty = MVT::getTypeForValueType(VT);
2577 const PointerType *PT = dyn_cast<PointerType>(SV->getType());
2578 assert(PT && "Value for store must be a pointer");
2579 Ty = PT->getElementType();
2581 assert(Ty && "Could not get type information for store");
2582 Alignment = TLI.getTargetData()->getABITypeAlignment(Ty);
2584 SDVTList VTs = getVTList(MVT::Other);
2585 SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType());
2586 SDOperand Ops[] = { Chain, Val, Ptr, Undef };
2587 FoldingSetNodeID ID;
2588 AddNodeIDNode(ID, ISD::STORE, VTs, Ops, 4);
2589 ID.AddInteger(ISD::UNINDEXED);
2591 ID.AddInteger((unsigned int)SVT);
2592 ID.AddInteger(Alignment);
2593 ID.AddInteger(isVolatile);
2595 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
2596 return SDOperand(E, 0);
2597 SDNode *N = new StoreSDNode(Ops, VTs, ISD::UNINDEXED, true,
2598 SVT, SV, SVOffset, Alignment, isVolatile);
2599 CSEMap.InsertNode(N, IP);
2600 AllNodes.push_back(N);
2601 return SDOperand(N, 0);
2605 SelectionDAG::getIndexedStore(SDOperand OrigStore, SDOperand Base,
2606 SDOperand Offset, ISD::MemIndexedMode AM) {
2607 StoreSDNode *ST = cast<StoreSDNode>(OrigStore);
2608 assert(ST->getOffset().getOpcode() == ISD::UNDEF &&
2609 "Store is already a indexed store!");
2610 SDVTList VTs = getVTList(Base.getValueType(), MVT::Other);
2611 SDOperand Ops[] = { ST->getChain(), ST->getValue(), Base, Offset };
2612 FoldingSetNodeID ID;
2613 AddNodeIDNode(ID, ISD::STORE, VTs, Ops, 4);
2615 ID.AddInteger(ST->isTruncatingStore());
2616 ID.AddInteger((unsigned int)(ST->getMemoryVT()));
2617 ID.AddInteger(ST->getAlignment());
2618 ID.AddInteger(ST->isVolatile());
2620 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
2621 return SDOperand(E, 0);
2622 SDNode *N = new StoreSDNode(Ops, VTs, AM,
2623 ST->isTruncatingStore(), ST->getMemoryVT(),
2624 ST->getSrcValue(), ST->getSrcValueOffset(),
2625 ST->getAlignment(), ST->isVolatile());
2626 CSEMap.InsertNode(N, IP);
2627 AllNodes.push_back(N);
2628 return SDOperand(N, 0);
2631 SDOperand SelectionDAG::getVAArg(MVT::ValueType VT,
2632 SDOperand Chain, SDOperand Ptr,
2634 SDOperand Ops[] = { Chain, Ptr, SV };
2635 return getNode(ISD::VAARG, getVTList(VT, MVT::Other), Ops, 3);
2638 SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
2639 const SDOperand *Ops, unsigned NumOps) {
2641 case 0: return getNode(Opcode, VT);
2642 case 1: return getNode(Opcode, VT, Ops[0]);
2643 case 2: return getNode(Opcode, VT, Ops[0], Ops[1]);
2644 case 3: return getNode(Opcode, VT, Ops[0], Ops[1], Ops[2]);
2650 case ISD::SELECT_CC: {
2651 assert(NumOps == 5 && "SELECT_CC takes 5 operands!");
2652 assert(Ops[0].getValueType() == Ops[1].getValueType() &&
2653 "LHS and RHS of condition must have same type!");
2654 assert(Ops[2].getValueType() == Ops[3].getValueType() &&
2655 "True and False arms of SelectCC must have same type!");
2656 assert(Ops[2].getValueType() == VT &&
2657 "select_cc node must be of same type as true and false value!");
2661 assert(NumOps == 5 && "BR_CC takes 5 operands!");
2662 assert(Ops[2].getValueType() == Ops[3].getValueType() &&
2663 "LHS/RHS of comparison should match types!");
2670 SDVTList VTs = getVTList(VT);
2671 if (VT != MVT::Flag) {
2672 FoldingSetNodeID ID;
2673 AddNodeIDNode(ID, Opcode, VTs, Ops, NumOps);
2675 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
2676 return SDOperand(E, 0);
2677 N = new SDNode(Opcode, VTs, Ops, NumOps);
2678 CSEMap.InsertNode(N, IP);
2680 N = new SDNode(Opcode, VTs, Ops, NumOps);
2682 AllNodes.push_back(N);
2683 return SDOperand(N, 0);
2686 SDOperand SelectionDAG::getNode(unsigned Opcode,
2687 std::vector<MVT::ValueType> &ResultTys,
2688 const SDOperand *Ops, unsigned NumOps) {
2689 return getNode(Opcode, getNodeValueTypes(ResultTys), ResultTys.size(),
2693 SDOperand SelectionDAG::getNode(unsigned Opcode,
2694 const MVT::ValueType *VTs, unsigned NumVTs,
2695 const SDOperand *Ops, unsigned NumOps) {
2697 return getNode(Opcode, VTs[0], Ops, NumOps);
2698 return getNode(Opcode, makeVTList(VTs, NumVTs), Ops, NumOps);
2701 SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
2702 const SDOperand *Ops, unsigned NumOps) {
2703 if (VTList.NumVTs == 1)
2704 return getNode(Opcode, VTList.VTs[0], Ops, NumOps);
2707 // FIXME: figure out how to safely handle things like
2708 // int foo(int x) { return 1 << (x & 255); }
2709 // int bar() { return foo(256); }
2711 case ISD::SRA_PARTS:
2712 case ISD::SRL_PARTS:
2713 case ISD::SHL_PARTS:
2714 if (N3.getOpcode() == ISD::SIGN_EXTEND_INREG &&
2715 cast<VTSDNode>(N3.getOperand(1))->getVT() != MVT::i1)
2716 return getNode(Opcode, VT, N1, N2, N3.getOperand(0));
2717 else if (N3.getOpcode() == ISD::AND)
2718 if (ConstantSDNode *AndRHS = dyn_cast<ConstantSDNode>(N3.getOperand(1))) {
2719 // If the and is only masking out bits that cannot effect the shift,
2720 // eliminate the and.
2721 unsigned NumBits = MVT::getSizeInBits(VT)*2;
2722 if ((AndRHS->getValue() & (NumBits-1)) == NumBits-1)
2723 return getNode(Opcode, VT, N1, N2, N3.getOperand(0));
2729 // Memoize the node unless it returns a flag.
2731 if (VTList.VTs[VTList.NumVTs-1] != MVT::Flag) {
2732 FoldingSetNodeID ID;
2733 AddNodeIDNode(ID, Opcode, VTList, Ops, NumOps);
2735 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP))
2736 return SDOperand(E, 0);
2738 N = new UnarySDNode(Opcode, VTList, Ops[0]);
2739 else if (NumOps == 2)
2740 N = new BinarySDNode(Opcode, VTList, Ops[0], Ops[1]);
2741 else if (NumOps == 3)
2742 N = new TernarySDNode(Opcode, VTList, Ops[0], Ops[1], Ops[2]);
2744 N = new SDNode(Opcode, VTList, Ops, NumOps);
2745 CSEMap.InsertNode(N, IP);
2748 N = new UnarySDNode(Opcode, VTList, Ops[0]);
2749 else if (NumOps == 2)
2750 N = new BinarySDNode(Opcode, VTList, Ops[0], Ops[1]);
2751 else if (NumOps == 3)
2752 N = new TernarySDNode(Opcode, VTList, Ops[0], Ops[1], Ops[2]);
2754 N = new SDNode(Opcode, VTList, Ops, NumOps);
2756 AllNodes.push_back(N);
2757 return SDOperand(N, 0);
2760 SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList) {
2761 return getNode(Opcode, VTList, 0, 0);
2764 SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
2766 SDOperand Ops[] = { N1 };
2767 return getNode(Opcode, VTList, Ops, 1);
2770 SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
2771 SDOperand N1, SDOperand N2) {
2772 SDOperand Ops[] = { N1, N2 };
2773 return getNode(Opcode, VTList, Ops, 2);
2776 SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
2777 SDOperand N1, SDOperand N2, SDOperand N3) {
2778 SDOperand Ops[] = { N1, N2, N3 };
2779 return getNode(Opcode, VTList, Ops, 3);
2782 SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
2783 SDOperand N1, SDOperand N2, SDOperand N3,
2785 SDOperand Ops[] = { N1, N2, N3, N4 };
2786 return getNode(Opcode, VTList, Ops, 4);
2789 SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList,
2790 SDOperand N1, SDOperand N2, SDOperand N3,
2791 SDOperand N4, SDOperand N5) {
2792 SDOperand Ops[] = { N1, N2, N3, N4, N5 };
2793 return getNode(Opcode, VTList, Ops, 5);
2796 SDVTList SelectionDAG::getVTList(MVT::ValueType VT) {
2797 return makeVTList(SDNode::getValueTypeList(VT), 1);
2800 SDVTList SelectionDAG::getVTList(MVT::ValueType VT1, MVT::ValueType VT2) {
2801 for (std::list<std::vector<MVT::ValueType> >::iterator I = VTList.begin(),
2802 E = VTList.end(); I != E; ++I) {
2803 if (I->size() == 2 && (*I)[0] == VT1 && (*I)[1] == VT2)
2804 return makeVTList(&(*I)[0], 2);
2806 std::vector<MVT::ValueType> V;
2809 VTList.push_front(V);
2810 return makeVTList(&(*VTList.begin())[0], 2);
2812 SDVTList SelectionDAG::getVTList(MVT::ValueType VT1, MVT::ValueType VT2,
2813 MVT::ValueType VT3) {
2814 for (std::list<std::vector<MVT::ValueType> >::iterator I = VTList.begin(),
2815 E = VTList.end(); I != E; ++I) {
2816 if (I->size() == 3 && (*I)[0] == VT1 && (*I)[1] == VT2 &&
2818 return makeVTList(&(*I)[0], 3);
2820 std::vector<MVT::ValueType> V;
2824 VTList.push_front(V);
2825 return makeVTList(&(*VTList.begin())[0], 3);
2828 SDVTList SelectionDAG::getVTList(const MVT::ValueType *VTs, unsigned NumVTs) {
2830 case 0: assert(0 && "Cannot have nodes without results!");
2831 case 1: return getVTList(VTs[0]);
2832 case 2: return getVTList(VTs[0], VTs[1]);
2833 case 3: return getVTList(VTs[0], VTs[1], VTs[2]);
2837 for (std::list<std::vector<MVT::ValueType> >::iterator I = VTList.begin(),
2838 E = VTList.end(); I != E; ++I) {
2839 if (I->size() != NumVTs || VTs[0] != (*I)[0] || VTs[1] != (*I)[1]) continue;
2841 bool NoMatch = false;
2842 for (unsigned i = 2; i != NumVTs; ++i)
2843 if (VTs[i] != (*I)[i]) {
2848 return makeVTList(&*I->begin(), NumVTs);
2851 VTList.push_front(std::vector<MVT::ValueType>(VTs, VTs+NumVTs));
2852 return makeVTList(&*VTList.begin()->begin(), NumVTs);
2856 /// UpdateNodeOperands - *Mutate* the specified node in-place to have the
2857 /// specified operands. If the resultant node already exists in the DAG,
2858 /// this does not modify the specified node, instead it returns the node that
2859 /// already exists. If the resultant node does not exist in the DAG, the
2860 /// input node is returned. As a degenerate case, if you specify the same
2861 /// input operands as the node already has, the input node is returned.
2862 SDOperand SelectionDAG::
2863 UpdateNodeOperands(SDOperand InN, SDOperand Op) {
2864 SDNode *N = InN.Val;
2865 assert(N->getNumOperands() == 1 && "Update with wrong number of operands");
2867 // Check to see if there is no change.
2868 if (Op == N->getOperand(0)) return InN;
2870 // See if the modified node already exists.
2871 void *InsertPos = 0;
2872 if (SDNode *Existing = FindModifiedNodeSlot(N, Op, InsertPos))
2873 return SDOperand(Existing, InN.ResNo);
2875 // Nope it doesn't. Remove the node from it's current place in the maps.
2877 RemoveNodeFromCSEMaps(N);
2879 // Now we update the operands.
2880 N->OperandList[0].Val->removeUser(N);
2882 N->OperandList[0] = Op;
2884 // If this gets put into a CSE map, add it.
2885 if (InsertPos) CSEMap.InsertNode(N, InsertPos);
2889 SDOperand SelectionDAG::
2890 UpdateNodeOperands(SDOperand InN, SDOperand Op1, SDOperand Op2) {
2891 SDNode *N = InN.Val;
2892 assert(N->getNumOperands() == 2 && "Update with wrong number of operands");
2894 // Check to see if there is no change.
2895 if (Op1 == N->getOperand(0) && Op2 == N->getOperand(1))
2896 return InN; // No operands changed, just return the input node.
2898 // See if the modified node already exists.
2899 void *InsertPos = 0;
2900 if (SDNode *Existing = FindModifiedNodeSlot(N, Op1, Op2, InsertPos))
2901 return SDOperand(Existing, InN.ResNo);
2903 // Nope it doesn't. Remove the node from it's current place in the maps.
2905 RemoveNodeFromCSEMaps(N);
2907 // Now we update the operands.
2908 if (N->OperandList[0] != Op1) {
2909 N->OperandList[0].Val->removeUser(N);
2910 Op1.Val->addUser(N);
2911 N->OperandList[0] = Op1;
2913 if (N->OperandList[1] != Op2) {
2914 N->OperandList[1].Val->removeUser(N);
2915 Op2.Val->addUser(N);
2916 N->OperandList[1] = Op2;
2919 // If this gets put into a CSE map, add it.
2920 if (InsertPos) CSEMap.InsertNode(N, InsertPos);
2924 SDOperand SelectionDAG::
2925 UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, SDOperand Op3) {
2926 SDOperand Ops[] = { Op1, Op2, Op3 };
2927 return UpdateNodeOperands(N, Ops, 3);
2930 SDOperand SelectionDAG::
2931 UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
2932 SDOperand Op3, SDOperand Op4) {
2933 SDOperand Ops[] = { Op1, Op2, Op3, Op4 };
2934 return UpdateNodeOperands(N, Ops, 4);
2937 SDOperand SelectionDAG::
2938 UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
2939 SDOperand Op3, SDOperand Op4, SDOperand Op5) {
2940 SDOperand Ops[] = { Op1, Op2, Op3, Op4, Op5 };
2941 return UpdateNodeOperands(N, Ops, 5);
2945 SDOperand SelectionDAG::
2946 UpdateNodeOperands(SDOperand InN, SDOperand *Ops, unsigned NumOps) {
2947 SDNode *N = InN.Val;
2948 assert(N->getNumOperands() == NumOps &&
2949 "Update with wrong number of operands");
2951 // Check to see if there is no change.
2952 bool AnyChange = false;
2953 for (unsigned i = 0; i != NumOps; ++i) {
2954 if (Ops[i] != N->getOperand(i)) {
2960 // No operands changed, just return the input node.
2961 if (!AnyChange) return InN;
2963 // See if the modified node already exists.
2964 void *InsertPos = 0;
2965 if (SDNode *Existing = FindModifiedNodeSlot(N, Ops, NumOps, InsertPos))
2966 return SDOperand(Existing, InN.ResNo);
2968 // Nope it doesn't. Remove the node from it's current place in the maps.
2970 RemoveNodeFromCSEMaps(N);
2972 // Now we update the operands.
2973 for (unsigned i = 0; i != NumOps; ++i) {
2974 if (N->OperandList[i] != Ops[i]) {
2975 N->OperandList[i].Val->removeUser(N);
2976 Ops[i].Val->addUser(N);
2977 N->OperandList[i] = Ops[i];
2981 // If this gets put into a CSE map, add it.
2982 if (InsertPos) CSEMap.InsertNode(N, InsertPos);
2987 /// MorphNodeTo - This frees the operands of the current node, resets the
2988 /// opcode, types, and operands to the specified value. This should only be
2989 /// used by the SelectionDAG class.
2990 void SDNode::MorphNodeTo(unsigned Opc, SDVTList L,
2991 const SDOperand *Ops, unsigned NumOps) {
2994 NumValues = L.NumVTs;
2996 // Clear the operands list, updating used nodes to remove this from their
2998 for (op_iterator I = op_begin(), E = op_end(); I != E; ++I)
2999 I->Val->removeUser(this);
3001 // If NumOps is larger than the # of operands we currently have, reallocate
3002 // the operand list.
3003 if (NumOps > NumOperands) {
3004 if (OperandsNeedDelete)
3005 delete [] OperandList;
3006 OperandList = new SDOperand[NumOps];
3007 OperandsNeedDelete = true;
3010 // Assign the new operands.
3011 NumOperands = NumOps;
3013 for (unsigned i = 0, e = NumOps; i != e; ++i) {
3014 OperandList[i] = Ops[i];
3015 SDNode *N = OperandList[i].Val;
3016 N->Uses.push_back(this);
3020 /// SelectNodeTo - These are used for target selectors to *mutate* the
3021 /// specified node to have the specified return type, Target opcode, and
3022 /// operands. Note that target opcodes are stored as
3023 /// ISD::BUILTIN_OP_END+TargetOpcode in the node opcode field.
3025 /// Note that SelectNodeTo returns the resultant node. If there is already a
3026 /// node of the specified opcode and operands, it returns that node instead of
3027 /// the current one.
3028 SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
3029 MVT::ValueType VT) {
3030 SDVTList VTs = getVTList(VT);
3031 FoldingSetNodeID ID;
3032 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, 0, 0);
3034 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
3037 RemoveNodeFromCSEMaps(N);
3039 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, 0, 0);
3041 CSEMap.InsertNode(N, IP);
3045 SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
3046 MVT::ValueType VT, SDOperand Op1) {
3047 // If an identical node already exists, use it.
3048 SDVTList VTs = getVTList(VT);
3049 SDOperand Ops[] = { Op1 };
3051 FoldingSetNodeID ID;
3052 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 1);
3054 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
3057 RemoveNodeFromCSEMaps(N);
3058 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 1);
3059 CSEMap.InsertNode(N, IP);
3063 SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
3064 MVT::ValueType VT, SDOperand Op1,
3066 // If an identical node already exists, use it.
3067 SDVTList VTs = getVTList(VT);
3068 SDOperand Ops[] = { Op1, Op2 };
3070 FoldingSetNodeID ID;
3071 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 2);
3073 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
3076 RemoveNodeFromCSEMaps(N);
3078 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 2);
3080 CSEMap.InsertNode(N, IP); // Memoize the new node.
3084 SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
3085 MVT::ValueType VT, SDOperand Op1,
3086 SDOperand Op2, SDOperand Op3) {
3087 // If an identical node already exists, use it.
3088 SDVTList VTs = getVTList(VT);
3089 SDOperand Ops[] = { Op1, Op2, Op3 };
3090 FoldingSetNodeID ID;
3091 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 3);
3093 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
3096 RemoveNodeFromCSEMaps(N);
3098 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 3);
3100 CSEMap.InsertNode(N, IP); // Memoize the new node.
3104 SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
3105 MVT::ValueType VT, const SDOperand *Ops,
3107 // If an identical node already exists, use it.
3108 SDVTList VTs = getVTList(VT);
3109 FoldingSetNodeID ID;
3110 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, NumOps);
3112 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
3115 RemoveNodeFromCSEMaps(N);
3116 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, NumOps);
3118 CSEMap.InsertNode(N, IP); // Memoize the new node.
3122 SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
3123 MVT::ValueType VT1, MVT::ValueType VT2,
3124 SDOperand Op1, SDOperand Op2) {
3125 SDVTList VTs = getVTList(VT1, VT2);
3126 FoldingSetNodeID ID;
3127 SDOperand Ops[] = { Op1, Op2 };
3128 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 2);
3130 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
3133 RemoveNodeFromCSEMaps(N);
3134 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 2);
3135 CSEMap.InsertNode(N, IP); // Memoize the new node.
3139 SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc,
3140 MVT::ValueType VT1, MVT::ValueType VT2,
3141 SDOperand Op1, SDOperand Op2,
3143 // If an identical node already exists, use it.
3144 SDVTList VTs = getVTList(VT1, VT2);
3145 SDOperand Ops[] = { Op1, Op2, Op3 };
3146 FoldingSetNodeID ID;
3147 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 3);
3149 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP))
3152 RemoveNodeFromCSEMaps(N);
3154 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, 3);
3155 CSEMap.InsertNode(N, IP); // Memoize the new node.
3160 /// getTargetNode - These are used for target selectors to create a new node
3161 /// with specified return type(s), target opcode, and operands.
3163 /// Note that getTargetNode returns the resultant node. If there is already a
3164 /// node of the specified opcode and operands, it returns that node instead of
3165 /// the current one.
3166 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT) {
3167 return getNode(ISD::BUILTIN_OP_END+Opcode, VT).Val;
3169 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT,
3171 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1).Val;
3173 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT,
3174 SDOperand Op1, SDOperand Op2) {
3175 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2).Val;
3177 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT,
3178 SDOperand Op1, SDOperand Op2,
3180 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3).Val;
3182 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT,
3183 const SDOperand *Ops, unsigned NumOps) {
3184 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops, NumOps).Val;
3186 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1,
3187 MVT::ValueType VT2) {
3188 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2);
3190 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, &Op, 0).Val;
3192 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1,
3193 MVT::ValueType VT2, SDOperand Op1) {
3194 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2);
3195 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, &Op1, 1).Val;
3197 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1,
3198 MVT::ValueType VT2, SDOperand Op1,
3200 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2);
3201 SDOperand Ops[] = { Op1, Op2 };
3202 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, Ops, 2).Val;
3204 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1,
3205 MVT::ValueType VT2, SDOperand Op1,
3206 SDOperand Op2, SDOperand Op3) {
3207 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2);
3208 SDOperand Ops[] = { Op1, Op2, Op3 };
3209 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, Ops, 3).Val;
3211 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1,
3213 const SDOperand *Ops, unsigned NumOps) {
3214 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2);
3215 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, Ops, NumOps).Val;
3217 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1,
3218 MVT::ValueType VT2, MVT::ValueType VT3,
3219 SDOperand Op1, SDOperand Op2) {
3220 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2, VT3);
3221 SDOperand Ops[] = { Op1, Op2 };
3222 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 3, Ops, 2).Val;
3224 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1,
3225 MVT::ValueType VT2, MVT::ValueType VT3,
3226 SDOperand Op1, SDOperand Op2,
3228 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2, VT3);
3229 SDOperand Ops[] = { Op1, Op2, Op3 };
3230 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 3, Ops, 3).Val;
3232 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1,
3233 MVT::ValueType VT2, MVT::ValueType VT3,
3234 const SDOperand *Ops, unsigned NumOps) {
3235 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2, VT3);
3236 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 3, Ops, NumOps).Val;
3238 SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1,
3239 MVT::ValueType VT2, MVT::ValueType VT3,
3241 const SDOperand *Ops, unsigned NumOps) {
3242 std::vector<MVT::ValueType> VTList;
3243 VTList.push_back(VT1);
3244 VTList.push_back(VT2);
3245 VTList.push_back(VT3);
3246 VTList.push_back(VT4);
3247 const MVT::ValueType *VTs = getNodeValueTypes(VTList);
3248 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 4, Ops, NumOps).Val;
3250 SDNode *SelectionDAG::getTargetNode(unsigned Opcode,
3251 std::vector<MVT::ValueType> &ResultTys,
3252 const SDOperand *Ops, unsigned NumOps) {
3253 const MVT::ValueType *VTs = getNodeValueTypes(ResultTys);
3254 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, ResultTys.size(),
3259 /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
3260 /// This can cause recursive merging of nodes in the DAG.
3262 /// This version assumes From has a single result value.
3264 void SelectionDAG::ReplaceAllUsesWith(SDOperand FromN, SDOperand To,
3265 DAGUpdateListener *UpdateListener) {
3266 SDNode *From = FromN.Val;
3267 assert(From->getNumValues() == 1 && FromN.ResNo == 0 &&
3268 "Cannot replace with this method!");
3269 assert(From != To.Val && "Cannot replace uses of with self");
3271 while (!From->use_empty()) {
3272 // Process users until they are all gone.
3273 SDNode *U = *From->use_begin();
3275 // This node is about to morph, remove its old self from the CSE maps.
3276 RemoveNodeFromCSEMaps(U);
3278 for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands;
3280 if (I->Val == From) {
3281 From->removeUser(U);
3286 // Now that we have modified U, add it back to the CSE maps. If it already
3287 // exists there, recursively merge the results together.
3288 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) {
3289 ReplaceAllUsesWith(U, Existing, UpdateListener);
3290 // U is now dead. Inform the listener if it exists and delete it.
3292 UpdateListener->NodeDeleted(U);
3293 DeleteNodeNotInCSEMaps(U);
3295 // If the node doesn't already exist, we updated it. Inform a listener if
3298 UpdateListener->NodeUpdated(U);
3303 /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
3304 /// This can cause recursive merging of nodes in the DAG.
3306 /// This version assumes From/To have matching types and numbers of result
3309 void SelectionDAG::ReplaceAllUsesWith(SDNode *From, SDNode *To,
3310 DAGUpdateListener *UpdateListener) {
3311 assert(From != To && "Cannot replace uses of with self");
3312 assert(From->getNumValues() == To->getNumValues() &&
3313 "Cannot use this version of ReplaceAllUsesWith!");
3314 if (From->getNumValues() == 1) // If possible, use the faster version.
3315 return ReplaceAllUsesWith(SDOperand(From, 0), SDOperand(To, 0),
3318 while (!From->use_empty()) {
3319 // Process users until they are all gone.
3320 SDNode *U = *From->use_begin();
3322 // This node is about to morph, remove its old self from the CSE maps.
3323 RemoveNodeFromCSEMaps(U);
3325 for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands;
3327 if (I->Val == From) {
3328 From->removeUser(U);
3333 // Now that we have modified U, add it back to the CSE maps. If it already
3334 // exists there, recursively merge the results together.
3335 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) {
3336 ReplaceAllUsesWith(U, Existing, UpdateListener);
3337 // U is now dead. Inform the listener if it exists and delete it.
3339 UpdateListener->NodeDeleted(U);
3340 DeleteNodeNotInCSEMaps(U);
3342 // If the node doesn't already exist, we updated it. Inform a listener if
3345 UpdateListener->NodeUpdated(U);
3350 /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
3351 /// This can cause recursive merging of nodes in the DAG.
3353 /// This version can replace From with any result values. To must match the
3354 /// number and types of values returned by From.
3355 void SelectionDAG::ReplaceAllUsesWith(SDNode *From,
3356 const SDOperand *To,
3357 DAGUpdateListener *UpdateListener) {
3358 if (From->getNumValues() == 1) // Handle the simple case efficiently.
3359 return ReplaceAllUsesWith(SDOperand(From, 0), To[0], UpdateListener);
3361 while (!From->use_empty()) {
3362 // Process users until they are all gone.
3363 SDNode *U = *From->use_begin();
3365 // This node is about to morph, remove its old self from the CSE maps.
3366 RemoveNodeFromCSEMaps(U);
3368 for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands;
3370 if (I->Val == From) {
3371 const SDOperand &ToOp = To[I->ResNo];
3372 From->removeUser(U);
3374 ToOp.Val->addUser(U);
3377 // Now that we have modified U, add it back to the CSE maps. If it already
3378 // exists there, recursively merge the results together.
3379 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) {
3380 ReplaceAllUsesWith(U, Existing, UpdateListener);
3381 // U is now dead. Inform the listener if it exists and delete it.
3383 UpdateListener->NodeDeleted(U);
3384 DeleteNodeNotInCSEMaps(U);
3386 // If the node doesn't already exist, we updated it. Inform a listener if
3389 UpdateListener->NodeUpdated(U);
3395 /// ChainedSetUpdaterListener - This class is a DAGUpdateListener that removes
3396 /// any deleted nodes from the set passed into its constructor and recursively
3397 /// notifies another update listener if specified.
3398 class ChainedSetUpdaterListener :
3399 public SelectionDAG::DAGUpdateListener {
3400 SmallSetVector<SDNode*, 16> &Set;
3401 SelectionDAG::DAGUpdateListener *Chain;
3403 ChainedSetUpdaterListener(SmallSetVector<SDNode*, 16> &set,
3404 SelectionDAG::DAGUpdateListener *chain)
3405 : Set(set), Chain(chain) {}
3407 virtual void NodeDeleted(SDNode *N) {
3409 if (Chain) Chain->NodeDeleted(N);
3411 virtual void NodeUpdated(SDNode *N) {
3412 if (Chain) Chain->NodeUpdated(N);
3417 /// ReplaceAllUsesOfValueWith - Replace any uses of From with To, leaving
3418 /// uses of other values produced by From.Val alone. The Deleted vector is
3419 /// handled the same way as for ReplaceAllUsesWith.
3420 void SelectionDAG::ReplaceAllUsesOfValueWith(SDOperand From, SDOperand To,
3421 DAGUpdateListener *UpdateListener){
3422 assert(From != To && "Cannot replace a value with itself");
3424 // Handle the simple, trivial, case efficiently.
3425 if (From.Val->getNumValues() == 1) {
3426 ReplaceAllUsesWith(From, To, UpdateListener);
3430 if (From.use_empty()) return;
3432 // Get all of the users of From.Val. We want these in a nice,
3433 // deterministically ordered and uniqued set, so we use a SmallSetVector.
3434 SmallSetVector<SDNode*, 16> Users(From.Val->use_begin(), From.Val->use_end());
3436 // When one of the recursive merges deletes nodes from the graph, we need to
3437 // make sure that UpdateListener is notified *and* that the node is removed
3438 // from Users if present. CSUL does this.
3439 ChainedSetUpdaterListener CSUL(Users, UpdateListener);
3441 while (!Users.empty()) {
3442 // We know that this user uses some value of From. If it is the right
3443 // value, update it.
3444 SDNode *User = Users.back();
3447 // Scan for an operand that matches From.
3448 SDOperand *Op = User->OperandList, *E = User->OperandList+User->NumOperands;
3449 for (; Op != E; ++Op)
3450 if (*Op == From) break;
3452 // If there are no matches, the user must use some other result of From.
3453 if (Op == E) continue;
3455 // Okay, we know this user needs to be updated. Remove its old self
3456 // from the CSE maps.
3457 RemoveNodeFromCSEMaps(User);
3459 // Update all operands that match "From" in case there are multiple uses.
3460 for (; Op != E; ++Op) {
3462 From.Val->removeUser(User);
3464 To.Val->addUser(User);
3468 // Now that we have modified User, add it back to the CSE maps. If it
3469 // already exists there, recursively merge the results together.
3470 SDNode *Existing = AddNonLeafNodeToCSEMaps(User);
3472 if (UpdateListener) UpdateListener->NodeUpdated(User);
3473 continue; // Continue on to next user.
3476 // If there was already an existing matching node, use ReplaceAllUsesWith
3477 // to replace the dead one with the existing one. This can cause
3478 // recursive merging of other unrelated nodes down the line. The merging
3479 // can cause deletion of nodes that used the old value. To handle this, we
3480 // use CSUL to remove them from the Users set.
3481 ReplaceAllUsesWith(User, Existing, &CSUL);
3483 // User is now dead. Notify a listener if present.
3484 if (UpdateListener) UpdateListener->NodeDeleted(User);
3485 DeleteNodeNotInCSEMaps(User);
3490 /// AssignNodeIds - Assign a unique node id for each node in the DAG based on
3491 /// their allnodes order. It returns the maximum id.
3492 unsigned SelectionDAG::AssignNodeIds() {
3494 for (allnodes_iterator I = allnodes_begin(), E = allnodes_end(); I != E; ++I){
3501 /// AssignTopologicalOrder - Assign a unique node id for each node in the DAG
3502 /// based on their topological order. It returns the maximum id and a vector
3503 /// of the SDNodes* in assigned order by reference.
3504 unsigned SelectionDAG::AssignTopologicalOrder(std::vector<SDNode*> &TopOrder) {
3505 unsigned DAGSize = AllNodes.size();
3506 std::vector<unsigned> InDegree(DAGSize);
3507 std::vector<SDNode*> Sources;
3509 // Use a two pass approach to avoid using a std::map which is slow.
3511 for (allnodes_iterator I = allnodes_begin(),E = allnodes_end(); I != E; ++I){
3514 unsigned Degree = N->use_size();
3515 InDegree[N->getNodeId()] = Degree;
3517 Sources.push_back(N);
3521 while (!Sources.empty()) {
3522 SDNode *N = Sources.back();
3524 TopOrder.push_back(N);
3525 for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) {
3527 unsigned Degree = --InDegree[P->getNodeId()];
3529 Sources.push_back(P);
3533 // Second pass, assign the actual topological order as node ids.
3535 for (std::vector<SDNode*>::iterator TI = TopOrder.begin(),TE = TopOrder.end();
3537 (*TI)->setNodeId(Id++);
3544 //===----------------------------------------------------------------------===//
3546 //===----------------------------------------------------------------------===//
3548 // Out-of-line virtual method to give class a home.
3549 void SDNode::ANCHOR() {}
3550 void UnarySDNode::ANCHOR() {}
3551 void BinarySDNode::ANCHOR() {}
3552 void TernarySDNode::ANCHOR() {}
3553 void HandleSDNode::ANCHOR() {}
3554 void StringSDNode::ANCHOR() {}
3555 void ConstantSDNode::ANCHOR() {}
3556 void ConstantFPSDNode::ANCHOR() {}
3557 void GlobalAddressSDNode::ANCHOR() {}
3558 void FrameIndexSDNode::ANCHOR() {}
3559 void JumpTableSDNode::ANCHOR() {}
3560 void ConstantPoolSDNode::ANCHOR() {}
3561 void BasicBlockSDNode::ANCHOR() {}
3562 void SrcValueSDNode::ANCHOR() {}
3563 void MemOperandSDNode::ANCHOR() {}
3564 void RegisterSDNode::ANCHOR() {}
3565 void ExternalSymbolSDNode::ANCHOR() {}
3566 void CondCodeSDNode::ANCHOR() {}
3567 void VTSDNode::ANCHOR() {}
3568 void LoadSDNode::ANCHOR() {}
3569 void StoreSDNode::ANCHOR() {}
3571 HandleSDNode::~HandleSDNode() {
3572 SDVTList VTs = { 0, 0 };
3573 MorphNodeTo(ISD::HANDLENODE, VTs, 0, 0); // Drops operand uses.
3576 GlobalAddressSDNode::GlobalAddressSDNode(bool isTarget, const GlobalValue *GA,
3577 MVT::ValueType VT, int o)
3578 : SDNode(isa<GlobalVariable>(GA) &&
3579 cast<GlobalVariable>(GA)->isThreadLocal() ?
3581 (isTarget ? ISD::TargetGlobalTLSAddress : ISD::GlobalTLSAddress) :
3583 (isTarget ? ISD::TargetGlobalAddress : ISD::GlobalAddress),
3584 getSDVTList(VT)), Offset(o) {
3585 TheGlobal = const_cast<GlobalValue*>(GA);
3588 /// getMemOperand - Return a MemOperand object describing the memory
3589 /// reference performed by this load or store.
3590 MemOperand LSBaseSDNode::getMemOperand() const {
3591 int Size = (MVT::getSizeInBits(getMemoryVT()) + 7) >> 3;
3593 getOpcode() == ISD::LOAD ? MemOperand::MOLoad : MemOperand::MOStore;
3594 if (IsVolatile) Flags |= MemOperand::MOVolatile;
3596 // Check if the load references a frame index, and does not have
3598 const FrameIndexSDNode *FI =
3599 dyn_cast<const FrameIndexSDNode>(getBasePtr().Val);
3600 if (!getSrcValue() && FI)
3601 return MemOperand(PseudoSourceValue::getFixedStack(), Flags,
3602 FI->getIndex(), Size, Alignment);
3604 return MemOperand(getSrcValue(), Flags,
3605 getSrcValueOffset(), Size, Alignment);
3608 /// Profile - Gather unique data for the node.
3610 void SDNode::Profile(FoldingSetNodeID &ID) {
3611 AddNodeIDNode(ID, this);
3614 /// getValueTypeList - Return a pointer to the specified value type.
3616 const MVT::ValueType *SDNode::getValueTypeList(MVT::ValueType VT) {
3617 if (MVT::isExtendedVT(VT)) {
3618 static std::set<MVT::ValueType> EVTs;
3619 return &(*EVTs.insert(VT).first);
3621 static MVT::ValueType VTs[MVT::LAST_VALUETYPE];
3627 /// hasNUsesOfValue - Return true if there are exactly NUSES uses of the
3628 /// indicated value. This method ignores uses of other values defined by this
3630 bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) const {
3631 assert(Value < getNumValues() && "Bad value!");
3633 // If there is only one value, this is easy.
3634 if (getNumValues() == 1)
3635 return use_size() == NUses;
3636 if (use_size() < NUses) return false;
3638 SDOperand TheValue(const_cast<SDNode *>(this), Value);
3640 SmallPtrSet<SDNode*, 32> UsersHandled;
3642 for (SDNode::use_iterator UI = Uses.begin(), E = Uses.end(); UI != E; ++UI) {
3644 if (User->getNumOperands() == 1 ||
3645 UsersHandled.insert(User)) // First time we've seen this?
3646 for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i)
3647 if (User->getOperand(i) == TheValue) {
3649 return false; // too many uses
3654 // Found exactly the right number of uses?
3659 /// hasAnyUseOfValue - Return true if there are any use of the indicated
3660 /// value. This method ignores uses of other values defined by this operation.
3661 bool SDNode::hasAnyUseOfValue(unsigned Value) const {
3662 assert(Value < getNumValues() && "Bad value!");
3664 if (use_empty()) return false;
3666 SDOperand TheValue(const_cast<SDNode *>(this), Value);
3668 SmallPtrSet<SDNode*, 32> UsersHandled;
3670 for (SDNode::use_iterator UI = Uses.begin(), E = Uses.end(); UI != E; ++UI) {
3672 if (User->getNumOperands() == 1 ||
3673 UsersHandled.insert(User)) // First time we've seen this?
3674 for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i)
3675 if (User->getOperand(i) == TheValue) {
3684 /// isOnlyUse - Return true if this node is the only use of N.
3686 bool SDNode::isOnlyUse(SDNode *N) const {
3688 for (SDNode::use_iterator I = N->use_begin(), E = N->use_end(); I != E; ++I) {
3699 /// isOperand - Return true if this node is an operand of N.
3701 bool SDOperand::isOperand(SDNode *N) const {
3702 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
3703 if (*this == N->getOperand(i))
3708 bool SDNode::isOperand(SDNode *N) const {
3709 for (unsigned i = 0, e = N->NumOperands; i != e; ++i)
3710 if (this == N->OperandList[i].Val)
3715 /// reachesChainWithoutSideEffects - Return true if this operand (which must
3716 /// be a chain) reaches the specified operand without crossing any
3717 /// side-effecting instructions. In practice, this looks through token
3718 /// factors and non-volatile loads. In order to remain efficient, this only
3719 /// looks a couple of nodes in, it does not do an exhaustive search.
3720 bool SDOperand::reachesChainWithoutSideEffects(SDOperand Dest,
3721 unsigned Depth) const {
3722 if (*this == Dest) return true;
3724 // Don't search too deeply, we just want to be able to see through
3725 // TokenFactor's etc.
3726 if (Depth == 0) return false;
3728 // If this is a token factor, all inputs to the TF happen in parallel. If any
3729 // of the operands of the TF reach dest, then we can do the xform.
3730 if (getOpcode() == ISD::TokenFactor) {
3731 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
3732 if (getOperand(i).reachesChainWithoutSideEffects(Dest, Depth-1))
3737 // Loads don't have side effects, look through them.
3738 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(*this)) {
3739 if (!Ld->isVolatile())
3740 return Ld->getChain().reachesChainWithoutSideEffects(Dest, Depth-1);
3746 static void findPredecessor(SDNode *N, const SDNode *P, bool &found,
3747 SmallPtrSet<SDNode *, 32> &Visited) {
3748 if (found || !Visited.insert(N))
3751 for (unsigned i = 0, e = N->getNumOperands(); !found && i != e; ++i) {
3752 SDNode *Op = N->getOperand(i).Val;
3757 findPredecessor(Op, P, found, Visited);
3761 /// isPredecessor - Return true if this node is a predecessor of N. This node
3762 /// is either an operand of N or it can be reached by recursively traversing
3763 /// up the operands.
3764 /// NOTE: this is an expensive method. Use it carefully.
3765 bool SDNode::isPredecessor(SDNode *N) const {
3766 SmallPtrSet<SDNode *, 32> Visited;
3768 findPredecessor(N, this, found, Visited);
3772 uint64_t SDNode::getConstantOperandVal(unsigned Num) const {
3773 assert(Num < NumOperands && "Invalid child # of SDNode!");
3774 return cast<ConstantSDNode>(OperandList[Num])->getValue();
3777 std::string SDNode::getOperationName(const SelectionDAG *G) const {
3778 switch (getOpcode()) {
3780 if (getOpcode() < ISD::BUILTIN_OP_END)
3781 return "<<Unknown DAG Node>>";
3784 if (const TargetInstrInfo *TII = G->getTarget().getInstrInfo())
3785 if (getOpcode()-ISD::BUILTIN_OP_END < TII->getNumOpcodes())
3786 return TII->get(getOpcode()-ISD::BUILTIN_OP_END).getName();
3788 TargetLowering &TLI = G->getTargetLoweringInfo();
3790 TLI.getTargetNodeName(getOpcode());
3791 if (Name) return Name;
3794 return "<<Unknown Target Node>>";
3797 case ISD::PCMARKER: return "PCMarker";
3798 case ISD::READCYCLECOUNTER: return "ReadCycleCounter";
3799 case ISD::SRCVALUE: return "SrcValue";
3800 case ISD::MEMOPERAND: return "MemOperand";
3801 case ISD::EntryToken: return "EntryToken";
3802 case ISD::TokenFactor: return "TokenFactor";
3803 case ISD::AssertSext: return "AssertSext";
3804 case ISD::AssertZext: return "AssertZext";
3806 case ISD::STRING: return "String";
3807 case ISD::BasicBlock: return "BasicBlock";
3808 case ISD::VALUETYPE: return "ValueType";
3809 case ISD::Register: return "Register";
3811 case ISD::Constant: return "Constant";
3812 case ISD::ConstantFP: return "ConstantFP";
3813 case ISD::GlobalAddress: return "GlobalAddress";
3814 case ISD::GlobalTLSAddress: return "GlobalTLSAddress";
3815 case ISD::FrameIndex: return "FrameIndex";
3816 case ISD::JumpTable: return "JumpTable";
3817 case ISD::GLOBAL_OFFSET_TABLE: return "GLOBAL_OFFSET_TABLE";
3818 case ISD::RETURNADDR: return "RETURNADDR";
3819 case ISD::FRAMEADDR: return "FRAMEADDR";
3820 case ISD::FRAME_TO_ARGS_OFFSET: return "FRAME_TO_ARGS_OFFSET";
3821 case ISD::EXCEPTIONADDR: return "EXCEPTIONADDR";
3822 case ISD::EHSELECTION: return "EHSELECTION";
3823 case ISD::EH_RETURN: return "EH_RETURN";
3824 case ISD::ConstantPool: return "ConstantPool";
3825 case ISD::ExternalSymbol: return "ExternalSymbol";
3826 case ISD::INTRINSIC_WO_CHAIN: {
3827 unsigned IID = cast<ConstantSDNode>(getOperand(0))->getValue();
3828 return Intrinsic::getName((Intrinsic::ID)IID);
3830 case ISD::INTRINSIC_VOID:
3831 case ISD::INTRINSIC_W_CHAIN: {
3832 unsigned IID = cast<ConstantSDNode>(getOperand(1))->getValue();
3833 return Intrinsic::getName((Intrinsic::ID)IID);
3836 case ISD::BUILD_VECTOR: return "BUILD_VECTOR";
3837 case ISD::TargetConstant: return "TargetConstant";
3838 case ISD::TargetConstantFP:return "TargetConstantFP";
3839 case ISD::TargetGlobalAddress: return "TargetGlobalAddress";
3840 case ISD::TargetGlobalTLSAddress: return "TargetGlobalTLSAddress";
3841 case ISD::TargetFrameIndex: return "TargetFrameIndex";
3842 case ISD::TargetJumpTable: return "TargetJumpTable";
3843 case ISD::TargetConstantPool: return "TargetConstantPool";
3844 case ISD::TargetExternalSymbol: return "TargetExternalSymbol";
3846 case ISD::CopyToReg: return "CopyToReg";
3847 case ISD::CopyFromReg: return "CopyFromReg";
3848 case ISD::UNDEF: return "undef";
3849 case ISD::MERGE_VALUES: return "merge_values";
3850 case ISD::INLINEASM: return "inlineasm";
3851 case ISD::LABEL: return "label";
3852 case ISD::DECLARE: return "declare";
3853 case ISD::HANDLENODE: return "handlenode";
3854 case ISD::FORMAL_ARGUMENTS: return "formal_arguments";
3855 case ISD::CALL: return "call";
3858 case ISD::FABS: return "fabs";
3859 case ISD::FNEG: return "fneg";
3860 case ISD::FSQRT: return "fsqrt";
3861 case ISD::FSIN: return "fsin";
3862 case ISD::FCOS: return "fcos";
3863 case ISD::FPOWI: return "fpowi";
3864 case ISD::FPOW: return "fpow";
3867 case ISD::ADD: return "add";
3868 case ISD::SUB: return "sub";
3869 case ISD::MUL: return "mul";
3870 case ISD::MULHU: return "mulhu";
3871 case ISD::MULHS: return "mulhs";
3872 case ISD::SDIV: return "sdiv";
3873 case ISD::UDIV: return "udiv";
3874 case ISD::SREM: return "srem";
3875 case ISD::UREM: return "urem";
3876 case ISD::SMUL_LOHI: return "smul_lohi";
3877 case ISD::UMUL_LOHI: return "umul_lohi";
3878 case ISD::SDIVREM: return "sdivrem";
3879 case ISD::UDIVREM: return "divrem";
3880 case ISD::AND: return "and";
3881 case ISD::OR: return "or";
3882 case ISD::XOR: return "xor";
3883 case ISD::SHL: return "shl";
3884 case ISD::SRA: return "sra";
3885 case ISD::SRL: return "srl";
3886 case ISD::ROTL: return "rotl";
3887 case ISD::ROTR: return "rotr";
3888 case ISD::FADD: return "fadd";
3889 case ISD::FSUB: return "fsub";
3890 case ISD::FMUL: return "fmul";
3891 case ISD::FDIV: return "fdiv";
3892 case ISD::FREM: return "frem";
3893 case ISD::FCOPYSIGN: return "fcopysign";
3894 case ISD::FGETSIGN: return "fgetsign";
3896 case ISD::SETCC: return "setcc";
3897 case ISD::SELECT: return "select";
3898 case ISD::SELECT_CC: return "select_cc";
3899 case ISD::INSERT_VECTOR_ELT: return "insert_vector_elt";
3900 case ISD::EXTRACT_VECTOR_ELT: return "extract_vector_elt";
3901 case ISD::CONCAT_VECTORS: return "concat_vectors";
3902 case ISD::EXTRACT_SUBVECTOR: return "extract_subvector";
3903 case ISD::SCALAR_TO_VECTOR: return "scalar_to_vector";
3904 case ISD::VECTOR_SHUFFLE: return "vector_shuffle";
3905 case ISD::CARRY_FALSE: return "carry_false";
3906 case ISD::ADDC: return "addc";
3907 case ISD::ADDE: return "adde";
3908 case ISD::SUBC: return "subc";
3909 case ISD::SUBE: return "sube";
3910 case ISD::SHL_PARTS: return "shl_parts";
3911 case ISD::SRA_PARTS: return "sra_parts";
3912 case ISD::SRL_PARTS: return "srl_parts";
3914 case ISD::EXTRACT_SUBREG: return "extract_subreg";
3915 case ISD::INSERT_SUBREG: return "insert_subreg";
3917 // Conversion operators.
3918 case ISD::SIGN_EXTEND: return "sign_extend";
3919 case ISD::ZERO_EXTEND: return "zero_extend";
3920 case ISD::ANY_EXTEND: return "any_extend";
3921 case ISD::SIGN_EXTEND_INREG: return "sign_extend_inreg";
3922 case ISD::TRUNCATE: return "truncate";
3923 case ISD::FP_ROUND: return "fp_round";
3924 case ISD::FLT_ROUNDS_: return "flt_rounds";
3925 case ISD::FP_ROUND_INREG: return "fp_round_inreg";
3926 case ISD::FP_EXTEND: return "fp_extend";
3928 case ISD::SINT_TO_FP: return "sint_to_fp";
3929 case ISD::UINT_TO_FP: return "uint_to_fp";
3930 case ISD::FP_TO_SINT: return "fp_to_sint";
3931 case ISD::FP_TO_UINT: return "fp_to_uint";
3932 case ISD::BIT_CONVERT: return "bit_convert";
3934 // Control flow instructions
3935 case ISD::BR: return "br";
3936 case ISD::BRIND: return "brind";
3937 case ISD::BR_JT: return "br_jt";
3938 case ISD::BRCOND: return "brcond";
3939 case ISD::BR_CC: return "br_cc";
3940 case ISD::RET: return "ret";
3941 case ISD::CALLSEQ_START: return "callseq_start";
3942 case ISD::CALLSEQ_END: return "callseq_end";
3945 case ISD::LOAD: return "load";
3946 case ISD::STORE: return "store";
3947 case ISD::VAARG: return "vaarg";
3948 case ISD::VACOPY: return "vacopy";
3949 case ISD::VAEND: return "vaend";
3950 case ISD::VASTART: return "vastart";
3951 case ISD::DYNAMIC_STACKALLOC: return "dynamic_stackalloc";
3952 case ISD::EXTRACT_ELEMENT: return "extract_element";
3953 case ISD::BUILD_PAIR: return "build_pair";
3954 case ISD::STACKSAVE: return "stacksave";
3955 case ISD::STACKRESTORE: return "stackrestore";
3956 case ISD::TRAP: return "trap";
3958 // Block memory operations.
3959 case ISD::MEMSET: return "memset";
3960 case ISD::MEMCPY: return "memcpy";
3961 case ISD::MEMMOVE: return "memmove";
3964 case ISD::BSWAP: return "bswap";
3965 case ISD::CTPOP: return "ctpop";
3966 case ISD::CTTZ: return "cttz";
3967 case ISD::CTLZ: return "ctlz";
3970 case ISD::LOCATION: return "location";
3971 case ISD::DEBUG_LOC: return "debug_loc";
3974 case ISD::TRAMPOLINE: return "trampoline";
3977 switch (cast<CondCodeSDNode>(this)->get()) {
3978 default: assert(0 && "Unknown setcc condition!");
3979 case ISD::SETOEQ: return "setoeq";
3980 case ISD::SETOGT: return "setogt";
3981 case ISD::SETOGE: return "setoge";
3982 case ISD::SETOLT: return "setolt";
3983 case ISD::SETOLE: return "setole";
3984 case ISD::SETONE: return "setone";
3986 case ISD::SETO: return "seto";
3987 case ISD::SETUO: return "setuo";
3988 case ISD::SETUEQ: return "setue";
3989 case ISD::SETUGT: return "setugt";
3990 case ISD::SETUGE: return "setuge";
3991 case ISD::SETULT: return "setult";
3992 case ISD::SETULE: return "setule";
3993 case ISD::SETUNE: return "setune";
3995 case ISD::SETEQ: return "seteq";
3996 case ISD::SETGT: return "setgt";
3997 case ISD::SETGE: return "setge";
3998 case ISD::SETLT: return "setlt";
3999 case ISD::SETLE: return "setle";
4000 case ISD::SETNE: return "setne";
4005 const char *SDNode::getIndexedModeName(ISD::MemIndexedMode AM) {
4014 return "<post-inc>";
4016 return "<post-dec>";
4020 void SDNode::dump() const { dump(0); }
4021 void SDNode::dump(const SelectionDAG *G) const {
4022 cerr << (void*)this << ": ";
4024 for (unsigned i = 0, e = getNumValues(); i != e; ++i) {
4026 if (getValueType(i) == MVT::Other)
4029 cerr << MVT::getValueTypeString(getValueType(i));
4031 cerr << " = " << getOperationName(G);
4034 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
4035 if (i) cerr << ", ";
4036 cerr << (void*)getOperand(i).Val;
4037 if (unsigned RN = getOperand(i).ResNo)
4041 if (!isTargetOpcode() && getOpcode() == ISD::VECTOR_SHUFFLE) {
4042 SDNode *Mask = getOperand(2).Val;
4044 for (unsigned i = 0, e = Mask->getNumOperands(); i != e; ++i) {
4046 if (Mask->getOperand(i).getOpcode() == ISD::UNDEF)
4049 cerr << cast<ConstantSDNode>(Mask->getOperand(i))->getValue();
4054 if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(this)) {
4055 cerr << "<" << CSDN->getValue() << ">";
4056 } else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(this)) {
4057 if (&CSDN->getValueAPF().getSemantics()==&APFloat::IEEEsingle)
4058 cerr << "<" << CSDN->getValueAPF().convertToFloat() << ">";
4059 else if (&CSDN->getValueAPF().getSemantics()==&APFloat::IEEEdouble)
4060 cerr << "<" << CSDN->getValueAPF().convertToDouble() << ">";
4062 cerr << "<APFloat(";
4063 CSDN->getValueAPF().convertToAPInt().dump();
4066 } else if (const GlobalAddressSDNode *GADN =
4067 dyn_cast<GlobalAddressSDNode>(this)) {
4068 int offset = GADN->getOffset();
4070 WriteAsOperand(*cerr.stream(), GADN->getGlobal()) << ">";
4072 cerr << " + " << offset;
4074 cerr << " " << offset;
4075 } else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(this)) {
4076 cerr << "<" << FIDN->getIndex() << ">";
4077 } else if (const JumpTableSDNode *JTDN = dyn_cast<JumpTableSDNode>(this)) {
4078 cerr << "<" << JTDN->getIndex() << ">";
4079 } else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(this)){
4080 int offset = CP->getOffset();
4081 if (CP->isMachineConstantPoolEntry())
4082 cerr << "<" << *CP->getMachineCPVal() << ">";
4084 cerr << "<" << *CP->getConstVal() << ">";
4086 cerr << " + " << offset;
4088 cerr << " " << offset;
4089 } else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(this)) {
4091 const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock();
4093 cerr << LBB->getName() << " ";
4094 cerr << (const void*)BBDN->getBasicBlock() << ">";
4095 } else if (const RegisterSDNode *R = dyn_cast<RegisterSDNode>(this)) {
4096 if (G && R->getReg() &&
4097 TargetRegisterInfo::isPhysicalRegister(R->getReg())) {
4098 cerr << " " <<G->getTarget().getRegisterInfo()->getName(R->getReg());
4100 cerr << " #" << R->getReg();
4102 } else if (const ExternalSymbolSDNode *ES =
4103 dyn_cast<ExternalSymbolSDNode>(this)) {
4104 cerr << "'" << ES->getSymbol() << "'";
4105 } else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(this)) {
4107 cerr << "<" << M->getValue() << ">";
4110 } else if (const MemOperandSDNode *M = dyn_cast<MemOperandSDNode>(this)) {
4111 if (M->MO.getValue())
4112 cerr << "<" << M->MO.getValue() << ":" << M->MO.getOffset() << ">";
4114 cerr << "<null:" << M->MO.getOffset() << ">";
4115 } else if (const VTSDNode *N = dyn_cast<VTSDNode>(this)) {
4116 cerr << ":" << MVT::getValueTypeString(N->getVT());
4117 } else if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(this)) {
4118 const Value *SrcValue = LD->getSrcValue();
4119 int SrcOffset = LD->getSrcValueOffset();
4125 cerr << ":" << SrcOffset << ">";
4128 switch (LD->getExtensionType()) {
4129 default: doExt = false; break;
4131 cerr << " <anyext ";
4141 cerr << MVT::getValueTypeString(LD->getMemoryVT()) << ">";
4143 const char *AM = getIndexedModeName(LD->getAddressingMode());
4146 if (LD->isVolatile())
4147 cerr << " <volatile>";
4148 cerr << " alignment=" << LD->getAlignment();
4149 } else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(this)) {
4150 const Value *SrcValue = ST->getSrcValue();
4151 int SrcOffset = ST->getSrcValueOffset();
4157 cerr << ":" << SrcOffset << ">";
4159 if (ST->isTruncatingStore())
4161 << MVT::getValueTypeString(ST->getMemoryVT()) << ">";
4163 const char *AM = getIndexedModeName(ST->getAddressingMode());
4166 if (ST->isVolatile())
4167 cerr << " <volatile>";
4168 cerr << " alignment=" << ST->getAlignment();
4172 static void DumpNodes(const SDNode *N, unsigned indent, const SelectionDAG *G) {
4173 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
4174 if (N->getOperand(i).Val->hasOneUse())
4175 DumpNodes(N->getOperand(i).Val, indent+2, G);
4177 cerr << "\n" << std::string(indent+2, ' ')
4178 << (void*)N->getOperand(i).Val << ": <multiple use>";
4181 cerr << "\n" << std::string(indent, ' ');
4185 void SelectionDAG::dump() const {
4186 cerr << "SelectionDAG has " << AllNodes.size() << " nodes:";
4187 std::vector<const SDNode*> Nodes;
4188 for (allnodes_const_iterator I = allnodes_begin(), E = allnodes_end();
4192 std::sort(Nodes.begin(), Nodes.end());
4194 for (unsigned i = 0, e = Nodes.size(); i != e; ++i) {
4195 if (!Nodes[i]->hasOneUse() && Nodes[i] != getRoot().Val)
4196 DumpNodes(Nodes[i], 2, this);
4199 if (getRoot().Val) DumpNodes(getRoot().Val, 2, this);
4204 const Type *ConstantPoolSDNode::getType() const {
4205 if (isMachineConstantPoolEntry())
4206 return Val.MachineCPVal->getType();
4207 return Val.ConstVal->getType();