1 //===-- llvm/CodeGen/SelectionDAGNodes.h - SelectionDAG Nodes ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the SDNode class and derived classes, which are used to
11 // represent the nodes and operations present in a SelectionDAG. These nodes
12 // and operations are machine code level operations, with some similarities to
13 // the GCC RTL representation.
15 // Clients should include the SelectionDAG.h file instead of this file directly.
17 //===----------------------------------------------------------------------===//
19 #ifndef LLVM_CODEGEN_SELECTIONDAGNODES_H
20 #define LLVM_CODEGEN_SELECTIONDAGNODES_H
22 #include "llvm/ADT/BitVector.h"
23 #include "llvm/ADT/FoldingSet.h"
24 #include "llvm/ADT/GraphTraits.h"
25 #include "llvm/ADT/STLExtras.h"
26 #include "llvm/ADT/SmallPtrSet.h"
27 #include "llvm/ADT/SmallVector.h"
28 #include "llvm/ADT/ilist_node.h"
29 #include "llvm/ADT/iterator_range.h"
30 #include "llvm/CodeGen/ISDOpcodes.h"
31 #include "llvm/CodeGen/MachineMemOperand.h"
32 #include "llvm/CodeGen/ValueTypes.h"
33 #include "llvm/IR/Constants.h"
34 #include "llvm/IR/DebugLoc.h"
35 #include "llvm/IR/Instructions.h"
36 #include "llvm/Support/DataTypes.h"
37 #include "llvm/Support/MathExtras.h"
44 class MachineBasicBlock;
45 class MachineConstantPoolValue;
49 template <typename T> struct DenseMapInfo;
50 template <typename T> struct simplify_type;
51 template <typename T> struct ilist_traits;
53 /// Returns true if the opcode is a binary operation with flags.
54 static bool isBinOpWithFlags(unsigned Opcode) {
70 void checkForCycles(const SDNode *N, const SelectionDAG *DAG = nullptr,
73 /// This represents a list of ValueType's that has been intern'd by
74 /// a SelectionDAG. Instances of this simple value class are returned by
75 /// SelectionDAG::getVTList(...).
85 /// Return true if the specified node is a
86 /// BUILD_VECTOR where all of the elements are ~0 or undef.
87 bool isBuildVectorAllOnes(const SDNode *N);
89 /// Return true if the specified node is a
90 /// BUILD_VECTOR where all of the elements are 0 or undef.
91 bool isBuildVectorAllZeros(const SDNode *N);
93 /// \brief Return true if the specified node is a BUILD_VECTOR node of
94 /// all ConstantSDNode or undef.
95 bool isBuildVectorOfConstantSDNodes(const SDNode *N);
97 /// \brief Return true if the specified node is a BUILD_VECTOR node of
98 /// all ConstantFPSDNode or undef.
99 bool isBuildVectorOfConstantFPSDNodes(const SDNode *N);
101 /// Return true if the specified node is a
102 /// ISD::SCALAR_TO_VECTOR node or a BUILD_VECTOR node where only the low
103 /// element is not an undef.
104 bool isScalarToVector(const SDNode *N);
106 /// Return true if the node has at least one operand
107 /// and all operands of the specified node are ISD::UNDEF.
108 bool allOperandsUndef(const SDNode *N);
109 } // end llvm:ISD namespace
111 //===----------------------------------------------------------------------===//
112 /// Unlike LLVM values, Selection DAG nodes may return multiple
113 /// values as the result of a computation. Many nodes return multiple values,
114 /// from loads (which define a token and a return value) to ADDC (which returns
115 /// a result and a carry value), to calls (which may return an arbitrary number
118 /// As such, each use of a SelectionDAG computation must indicate the node that
119 /// computes it as well as which return value to use from that node. This pair
120 /// of information is represented with the SDValue value type.
123 friend struct DenseMapInfo<SDValue>;
125 SDNode *Node; // The node defining the value we are using.
126 unsigned ResNo; // Which return value of the node we are using.
128 SDValue() : Node(nullptr), ResNo(0) {}
129 SDValue(SDNode *node, unsigned resno);
131 /// get the index which selects a specific result in the SDNode
132 unsigned getResNo() const { return ResNo; }
134 /// get the SDNode which holds the desired result
135 SDNode *getNode() const { return Node; }
138 void setNode(SDNode *N) { Node = N; }
140 inline SDNode *operator->() const { return Node; }
142 bool operator==(const SDValue &O) const {
143 return Node == O.Node && ResNo == O.ResNo;
145 bool operator!=(const SDValue &O) const {
146 return !operator==(O);
148 bool operator<(const SDValue &O) const {
149 return std::tie(Node, ResNo) < std::tie(O.Node, O.ResNo);
151 explicit operator bool() const {
152 return Node != nullptr;
155 SDValue getValue(unsigned R) const {
156 return SDValue(Node, R);
159 // Return true if this node is an operand of N.
160 bool isOperandOf(SDNode *N) const;
162 /// Return the ValueType of the referenced return value.
163 inline EVT getValueType() const;
165 /// Return the simple ValueType of the referenced return value.
166 MVT getSimpleValueType() const {
167 return getValueType().getSimpleVT();
170 /// Returns the size of the value in bits.
171 unsigned getValueSizeInBits() const {
172 return getValueType().getSizeInBits();
175 unsigned getScalarValueSizeInBits() const {
176 return getValueType().getScalarType().getSizeInBits();
179 // Forwarding methods - These forward to the corresponding methods in SDNode.
180 inline unsigned getOpcode() const;
181 inline unsigned getNumOperands() const;
182 inline const SDValue &getOperand(unsigned i) const;
183 inline uint64_t getConstantOperandVal(unsigned i) const;
184 inline bool isTargetMemoryOpcode() const;
185 inline bool isTargetOpcode() const;
186 inline bool isMachineOpcode() const;
187 inline unsigned getMachineOpcode() const;
188 inline const DebugLoc &getDebugLoc() const;
189 inline void dump() const;
190 inline void dumpr() const;
192 /// Return true if this operand (which must be a chain) reaches the
193 /// specified operand without crossing any side-effecting instructions.
194 /// In practice, this looks through token factors and non-volatile loads.
195 /// In order to remain efficient, this only
196 /// looks a couple of nodes in, it does not do an exhaustive search.
197 bool reachesChainWithoutSideEffects(SDValue Dest,
198 unsigned Depth = 2) const;
200 /// Return true if there are no nodes using value ResNo of Node.
201 inline bool use_empty() const;
203 /// Return true if there is exactly one node using value ResNo of Node.
204 inline bool hasOneUse() const;
208 template<> struct DenseMapInfo<SDValue> {
209 static inline SDValue getEmptyKey() {
214 static inline SDValue getTombstoneKey() {
219 static unsigned getHashValue(const SDValue &Val) {
220 return ((unsigned)((uintptr_t)Val.getNode() >> 4) ^
221 (unsigned)((uintptr_t)Val.getNode() >> 9)) + Val.getResNo();
223 static bool isEqual(const SDValue &LHS, const SDValue &RHS) {
227 template <> struct isPodLike<SDValue> { static const bool value = true; };
230 /// Allow casting operators to work directly on
231 /// SDValues as if they were SDNode*'s.
232 template<> struct simplify_type<SDValue> {
233 typedef SDNode* SimpleType;
234 static SimpleType getSimplifiedValue(SDValue &Val) {
235 return Val.getNode();
238 template<> struct simplify_type<const SDValue> {
239 typedef /*const*/ SDNode* SimpleType;
240 static SimpleType getSimplifiedValue(const SDValue &Val) {
241 return Val.getNode();
245 /// Represents a use of a SDNode. This class holds an SDValue,
246 /// which records the SDNode being used and the result number, a
247 /// pointer to the SDNode using the value, and Next and Prev pointers,
248 /// which link together all the uses of an SDNode.
251 /// Val - The value being used.
253 /// User - The user of this value.
255 /// Prev, Next - Pointers to the uses list of the SDNode referred by
259 SDUse(const SDUse &U) = delete;
260 void operator=(const SDUse &U) = delete;
263 SDUse() : Val(), User(nullptr), Prev(nullptr), Next(nullptr) {}
265 /// Normally SDUse will just implicitly convert to an SDValue that it holds.
266 operator const SDValue&() const { return Val; }
268 /// If implicit conversion to SDValue doesn't work, the get() method returns
270 const SDValue &get() const { return Val; }
272 /// This returns the SDNode that contains this Use.
273 SDNode *getUser() { return User; }
275 /// Get the next SDUse in the use list.
276 SDUse *getNext() const { return Next; }
278 /// Convenience function for get().getNode().
279 SDNode *getNode() const { return Val.getNode(); }
280 /// Convenience function for get().getResNo().
281 unsigned getResNo() const { return Val.getResNo(); }
282 /// Convenience function for get().getValueType().
283 EVT getValueType() const { return Val.getValueType(); }
285 /// Convenience function for get().operator==
286 bool operator==(const SDValue &V) const {
290 /// Convenience function for get().operator!=
291 bool operator!=(const SDValue &V) const {
295 /// Convenience function for get().operator<
296 bool operator<(const SDValue &V) const {
301 friend class SelectionDAG;
304 void setUser(SDNode *p) { User = p; }
306 /// Remove this use from its existing use list, assign it the
307 /// given value, and add it to the new value's node's use list.
308 inline void set(const SDValue &V);
309 /// Like set, but only supports initializing a newly-allocated
310 /// SDUse with a non-null value.
311 inline void setInitial(const SDValue &V);
312 /// Like set, but only sets the Node portion of the value,
313 /// leaving the ResNo portion unmodified.
314 inline void setNode(SDNode *N);
316 void addToList(SDUse **List) {
318 if (Next) Next->Prev = &Next;
323 void removeFromList() {
325 if (Next) Next->Prev = Prev;
329 /// simplify_type specializations - Allow casting operators to work directly on
330 /// SDValues as if they were SDNode*'s.
331 template<> struct simplify_type<SDUse> {
332 typedef SDNode* SimpleType;
333 static SimpleType getSimplifiedValue(SDUse &Val) {
334 return Val.getNode();
339 /// Represents one node in the SelectionDAG.
341 class SDNode : public FoldingSetNode, public ilist_node<SDNode> {
343 /// The operation that this node performs.
346 /// This is true if OperandList was new[]'d. If true,
347 /// then they will be delete[]'d when the node is destroyed.
348 uint16_t OperandsNeedDelete : 1;
350 /// This tracks whether this node has one or more dbg_value
351 /// nodes corresponding to it.
352 uint16_t HasDebugValue : 1;
355 /// This member is defined by this class, but is not used for
356 /// anything. Subclasses can use it to hold whatever state they find useful.
357 /// This field is initialized to zero by the ctor.
358 uint16_t SubclassData : 14;
361 /// Unique id per SDNode in the DAG.
364 /// The values that are used by this operation.
367 /// The types of the values this node defines. SDNode's may
368 /// define multiple values simultaneously.
369 const EVT *ValueList;
371 /// List of uses for this SDNode.
374 /// The number of entries in the Operand/Value list.
375 unsigned short NumOperands, NumValues;
377 /// Source line information.
380 // The ordering of the SDNodes. It roughly corresponds to the ordering of the
381 // original LLVM instructions.
382 // This is used for turning off scheduling, because we'll forgo
383 // the normal scheduling algorithms and output the instructions according to
387 /// Return a pointer to the specified value type.
388 static const EVT *getValueTypeList(EVT VT);
390 friend class SelectionDAG;
391 friend struct ilist_traits<SDNode>;
394 //===--------------------------------------------------------------------===//
398 /// Return the SelectionDAG opcode value for this node. For
399 /// pre-isel nodes (those for which isMachineOpcode returns false), these
400 /// are the opcode values in the ISD and <target>ISD namespaces. For
401 /// post-isel opcodes, see getMachineOpcode.
402 unsigned getOpcode() const { return (unsigned short)NodeType; }
404 /// Test if this node has a target-specific opcode (in the
405 /// \<target\>ISD namespace).
406 bool isTargetOpcode() const { return NodeType >= ISD::BUILTIN_OP_END; }
408 /// Test if this node has a target-specific
409 /// memory-referencing opcode (in the \<target\>ISD namespace and
410 /// greater than FIRST_TARGET_MEMORY_OPCODE).
411 bool isTargetMemoryOpcode() const {
412 return NodeType >= ISD::FIRST_TARGET_MEMORY_OPCODE;
415 /// Test if this node is a memory intrinsic (with valid pointer information).
416 /// INTRINSIC_W_CHAIN and INTRINSIC_VOID nodes are sometimes created for
417 /// non-memory intrinsics (with chains) that are not really instances of
418 /// MemSDNode. For such nodes, we need some extra state to determine the
419 /// proper classof relationship.
420 bool isMemIntrinsic() const {
421 return (NodeType == ISD::INTRINSIC_W_CHAIN ||
422 NodeType == ISD::INTRINSIC_VOID) && ((SubclassData >> 13) & 1);
425 /// Test if this node has a post-isel opcode, directly
426 /// corresponding to a MachineInstr opcode.
427 bool isMachineOpcode() const { return NodeType < 0; }
429 /// This may only be called if isMachineOpcode returns
430 /// true. It returns the MachineInstr opcode value that the node's opcode
432 unsigned getMachineOpcode() const {
433 assert(isMachineOpcode() && "Not a MachineInstr opcode!");
438 bool getHasDebugValue() const { return HasDebugValue; }
441 void setHasDebugValue(bool b) { HasDebugValue = b; }
443 /// Return true if there are no uses of this node.
444 bool use_empty() const { return UseList == nullptr; }
446 /// Return true if there is exactly one use of this node.
447 bool hasOneUse() const {
448 return !use_empty() && std::next(use_begin()) == use_end();
451 /// Return the number of uses of this node. This method takes
452 /// time proportional to the number of uses.
453 size_t use_size() const { return std::distance(use_begin(), use_end()); }
455 /// Return the unique node id.
456 int getNodeId() const { return NodeId; }
458 /// Set unique node id.
459 void setNodeId(int Id) { NodeId = Id; }
461 /// Return the node ordering.
462 unsigned getIROrder() const { return IROrder; }
464 /// Set the node ordering.
465 void setIROrder(unsigned Order) { IROrder = Order; }
467 /// Return the source location info.
468 const DebugLoc &getDebugLoc() const { return debugLoc; }
470 /// Set source location info. Try to avoid this, putting
471 /// it in the constructor is preferable.
472 void setDebugLoc(DebugLoc dl) { debugLoc = std::move(dl); }
474 /// This class provides iterator support for SDUse
475 /// operands that use a specific SDNode.
477 : public std::iterator<std::forward_iterator_tag, SDUse, ptrdiff_t> {
479 explicit use_iterator(SDUse *op) : Op(op) {
483 typedef std::iterator<std::forward_iterator_tag,
484 SDUse, ptrdiff_t>::reference reference;
485 typedef std::iterator<std::forward_iterator_tag,
486 SDUse, ptrdiff_t>::pointer pointer;
488 use_iterator(const use_iterator &I) : Op(I.Op) {}
489 use_iterator() : Op(nullptr) {}
491 bool operator==(const use_iterator &x) const {
494 bool operator!=(const use_iterator &x) const {
495 return !operator==(x);
498 /// Return true if this iterator is at the end of uses list.
499 bool atEnd() const { return Op == nullptr; }
501 // Iterator traversal: forward iteration only.
502 use_iterator &operator++() { // Preincrement
503 assert(Op && "Cannot increment end iterator!");
508 use_iterator operator++(int) { // Postincrement
509 use_iterator tmp = *this; ++*this; return tmp;
512 /// Retrieve a pointer to the current user node.
513 SDNode *operator*() const {
514 assert(Op && "Cannot dereference end iterator!");
515 return Op->getUser();
518 SDNode *operator->() const { return operator*(); }
520 SDUse &getUse() const { return *Op; }
522 /// Retrieve the operand # of this use in its user.
523 unsigned getOperandNo() const {
524 assert(Op && "Cannot dereference end iterator!");
525 return (unsigned)(Op - Op->getUser()->OperandList);
529 /// Provide iteration support to walk over all uses of an SDNode.
530 use_iterator use_begin() const {
531 return use_iterator(UseList);
534 static use_iterator use_end() { return use_iterator(nullptr); }
536 inline iterator_range<use_iterator> uses() {
537 return iterator_range<use_iterator>(use_begin(), use_end());
539 inline iterator_range<use_iterator> uses() const {
540 return iterator_range<use_iterator>(use_begin(), use_end());
543 /// Return true if there are exactly NUSES uses of the indicated value.
544 /// This method ignores uses of other values defined by this operation.
545 bool hasNUsesOfValue(unsigned NUses, unsigned Value) const;
547 /// Return true if there are any use of the indicated value.
548 /// This method ignores uses of other values defined by this operation.
549 bool hasAnyUseOfValue(unsigned Value) const;
551 /// Return true if this node is the only use of N.
552 bool isOnlyUserOf(SDNode *N) const;
554 /// Return true if this node is an operand of N.
555 bool isOperandOf(SDNode *N) const;
557 /// Return true if this node is a predecessor of N.
558 /// NOTE: Implemented on top of hasPredecessor and every bit as
559 /// expensive. Use carefully.
560 bool isPredecessorOf(const SDNode *N) const {
561 return N->hasPredecessor(this);
564 /// Return true if N is a predecessor of this node.
565 /// N is either an operand of this node, or can be reached by recursively
566 /// traversing up the operands.
567 /// NOTE: This is an expensive method. Use it carefully.
568 bool hasPredecessor(const SDNode *N) const;
570 /// Return true if N is a predecessor of this node.
571 /// N is either an operand of this node, or can be reached by recursively
572 /// traversing up the operands.
573 /// In this helper the Visited and worklist sets are held externally to
574 /// cache predecessors over multiple invocations. If you want to test for
575 /// multiple predecessors this method is preferable to multiple calls to
576 /// hasPredecessor. Be sure to clear Visited and Worklist if the DAG
578 /// NOTE: This is still very expensive. Use carefully.
579 bool hasPredecessorHelper(const SDNode *N,
580 SmallPtrSetImpl<const SDNode *> &Visited,
581 SmallVectorImpl<const SDNode *> &Worklist) const;
583 /// Return the number of values used by this operation.
584 unsigned getNumOperands() const { return NumOperands; }
586 /// Helper method returns the integer value of a ConstantSDNode operand.
587 uint64_t getConstantOperandVal(unsigned Num) const;
589 const SDValue &getOperand(unsigned Num) const {
590 assert(Num < NumOperands && "Invalid child # of SDNode!");
591 return OperandList[Num];
594 typedef SDUse* op_iterator;
595 op_iterator op_begin() const { return OperandList; }
596 op_iterator op_end() const { return OperandList+NumOperands; }
597 ArrayRef<SDUse> ops() const { return makeArrayRef(op_begin(), op_end()); }
599 SDVTList getVTList() const {
600 SDVTList X = { ValueList, NumValues };
604 /// If this node has a glue operand, return the node
605 /// to which the glue operand points. Otherwise return NULL.
606 SDNode *getGluedNode() const {
607 if (getNumOperands() != 0 &&
608 getOperand(getNumOperands()-1).getValueType() == MVT::Glue)
609 return getOperand(getNumOperands()-1).getNode();
613 // If this is a pseudo op, like copyfromreg, look to see if there is a
614 // real target node glued to it. If so, return the target node.
615 const SDNode *getGluedMachineNode() const {
616 const SDNode *FoundNode = this;
618 // Climb up glue edges until a machine-opcode node is found, or the
619 // end of the chain is reached.
620 while (!FoundNode->isMachineOpcode()) {
621 const SDNode *N = FoundNode->getGluedNode();
629 /// If this node has a glue value with a user, return
630 /// the user (there is at most one). Otherwise return NULL.
631 SDNode *getGluedUser() const {
632 for (use_iterator UI = use_begin(), UE = use_end(); UI != UE; ++UI)
633 if (UI.getUse().get().getValueType() == MVT::Glue)
638 /// Return the number of values defined/returned by this operator.
639 unsigned getNumValues() const { return NumValues; }
641 /// Return the type of a specified result.
642 EVT getValueType(unsigned ResNo) const {
643 assert(ResNo < NumValues && "Illegal result number!");
644 return ValueList[ResNo];
647 /// Return the type of a specified result as a simple type.
648 MVT getSimpleValueType(unsigned ResNo) const {
649 return getValueType(ResNo).getSimpleVT();
652 /// Returns MVT::getSizeInBits(getValueType(ResNo)).
653 unsigned getValueSizeInBits(unsigned ResNo) const {
654 return getValueType(ResNo).getSizeInBits();
657 typedef const EVT* value_iterator;
658 value_iterator value_begin() const { return ValueList; }
659 value_iterator value_end() const { return ValueList+NumValues; }
661 /// Return the opcode of this operation for printing.
662 std::string getOperationName(const SelectionDAG *G = nullptr) const;
663 static const char* getIndexedModeName(ISD::MemIndexedMode AM);
664 void print_types(raw_ostream &OS, const SelectionDAG *G) const;
665 void print_details(raw_ostream &OS, const SelectionDAG *G) const;
666 void print(raw_ostream &OS, const SelectionDAG *G = nullptr) const;
667 void printr(raw_ostream &OS, const SelectionDAG *G = nullptr) const;
669 /// Print a SelectionDAG node and all children down to
670 /// the leaves. The given SelectionDAG allows target-specific nodes
671 /// to be printed in human-readable form. Unlike printr, this will
672 /// print the whole DAG, including children that appear multiple
675 void printrFull(raw_ostream &O, const SelectionDAG *G = nullptr) const;
677 /// Print a SelectionDAG node and children up to
678 /// depth "depth." The given SelectionDAG allows target-specific
679 /// nodes to be printed in human-readable form. Unlike printr, this
680 /// will print children that appear multiple times wherever they are
683 void printrWithDepth(raw_ostream &O, const SelectionDAG *G = nullptr,
684 unsigned depth = 100) const;
687 /// Dump this node, for debugging.
690 /// Dump (recursively) this node and its use-def subgraph.
693 /// Dump this node, for debugging.
694 /// The given SelectionDAG allows target-specific nodes to be printed
695 /// in human-readable form.
696 void dump(const SelectionDAG *G) const;
698 /// Dump (recursively) this node and its use-def subgraph.
699 /// The given SelectionDAG allows target-specific nodes to be printed
700 /// in human-readable form.
701 void dumpr(const SelectionDAG *G) const;
703 /// printrFull to dbgs(). The given SelectionDAG allows
704 /// target-specific nodes to be printed in human-readable form.
705 /// Unlike dumpr, this will print the whole DAG, including children
706 /// that appear multiple times.
707 void dumprFull(const SelectionDAG *G = nullptr) const;
709 /// printrWithDepth to dbgs(). The given
710 /// SelectionDAG allows target-specific nodes to be printed in
711 /// human-readable form. Unlike dumpr, this will print children
712 /// that appear multiple times wherever they are used.
714 void dumprWithDepth(const SelectionDAG *G = nullptr,
715 unsigned depth = 100) const;
717 /// Gather unique data for the node.
718 void Profile(FoldingSetNodeID &ID) const;
720 /// This method should only be used by the SDUse class.
721 void addUse(SDUse &U) { U.addToList(&UseList); }
724 static SDVTList getSDVTList(EVT VT) {
725 SDVTList Ret = { getValueTypeList(VT), 1 };
729 SDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs,
730 ArrayRef<SDValue> Ops)
731 : NodeType(Opc), OperandsNeedDelete(true), HasDebugValue(false),
732 SubclassData(0), NodeId(-1),
733 OperandList(Ops.size() ? new SDUse[Ops.size()] : nullptr),
734 ValueList(VTs.VTs), UseList(nullptr), NumOperands(Ops.size()),
735 NumValues(VTs.NumVTs), debugLoc(std::move(dl)), IROrder(Order) {
736 assert(debugLoc.hasTrivialDestructor() && "Expected trivial destructor");
737 assert(NumOperands == Ops.size() &&
738 "NumOperands wasn't wide enough for its operands!");
739 assert(NumValues == VTs.NumVTs &&
740 "NumValues wasn't wide enough for its operands!");
741 for (unsigned i = 0; i != Ops.size(); ++i) {
742 assert(OperandList && "no operands available");
743 OperandList[i].setUser(this);
744 OperandList[i].setInitial(Ops[i]);
746 checkForCycles(this);
749 /// This constructor adds no operands itself; operands can be
750 /// set later with InitOperands.
751 SDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs)
752 : NodeType(Opc), OperandsNeedDelete(false), HasDebugValue(false),
753 SubclassData(0), NodeId(-1), OperandList(nullptr), ValueList(VTs.VTs),
754 UseList(nullptr), NumOperands(0), NumValues(VTs.NumVTs),
755 debugLoc(std::move(dl)), IROrder(Order) {
756 assert(debugLoc.hasTrivialDestructor() && "Expected trivial destructor");
757 assert(NumValues == VTs.NumVTs &&
758 "NumValues wasn't wide enough for its operands!");
761 /// Initialize the operands list of this with 1 operand.
762 void InitOperands(SDUse *Ops, const SDValue &Op0) {
763 Ops[0].setUser(this);
764 Ops[0].setInitial(Op0);
767 checkForCycles(this);
770 /// Initialize the operands list of this with 2 operands.
771 void InitOperands(SDUse *Ops, const SDValue &Op0, const SDValue &Op1) {
772 Ops[0].setUser(this);
773 Ops[0].setInitial(Op0);
774 Ops[1].setUser(this);
775 Ops[1].setInitial(Op1);
778 checkForCycles(this);
781 /// Initialize the operands list of this with 3 operands.
782 void InitOperands(SDUse *Ops, const SDValue &Op0, const SDValue &Op1,
783 const SDValue &Op2) {
784 Ops[0].setUser(this);
785 Ops[0].setInitial(Op0);
786 Ops[1].setUser(this);
787 Ops[1].setInitial(Op1);
788 Ops[2].setUser(this);
789 Ops[2].setInitial(Op2);
792 checkForCycles(this);
795 /// Initialize the operands list of this with 4 operands.
796 void InitOperands(SDUse *Ops, const SDValue &Op0, const SDValue &Op1,
797 const SDValue &Op2, const SDValue &Op3) {
798 Ops[0].setUser(this);
799 Ops[0].setInitial(Op0);
800 Ops[1].setUser(this);
801 Ops[1].setInitial(Op1);
802 Ops[2].setUser(this);
803 Ops[2].setInitial(Op2);
804 Ops[3].setUser(this);
805 Ops[3].setInitial(Op3);
808 checkForCycles(this);
811 /// Initialize the operands list of this with N operands.
812 void InitOperands(SDUse *Ops, const SDValue *Vals, unsigned N) {
813 for (unsigned i = 0; i != N; ++i) {
814 Ops[i].setUser(this);
815 Ops[i].setInitial(Vals[i]);
818 assert(NumOperands == N &&
819 "NumOperands wasn't wide enough for its operands!");
821 checkForCycles(this);
824 /// Release the operands and set this node to have zero operands.
828 /// Wrapper class for IR location info (IR ordering and DebugLoc) to be passed
829 /// into SDNode creation functions.
830 /// When an SDNode is created from the DAGBuilder, the DebugLoc is extracted
831 /// from the original Instruction, and IROrder is the ordinal position of
833 /// When an SDNode is created after the DAG is being built, both DebugLoc and
834 /// the IROrder are propagated from the original SDNode.
835 /// So SDLoc class provides two constructors besides the default one, one to
836 /// be used by the DAGBuilder, the other to be used by others.
839 // Ptr could be used for either Instruction* or SDNode*. It is used for
840 // Instruction* if IROrder is not -1.
845 SDLoc() : Ptr(nullptr), IROrder(0) {}
846 SDLoc(const SDNode *N) : Ptr(N), IROrder(-1) {
847 assert(N && "null SDNode");
849 SDLoc(const SDValue V) : Ptr(V.getNode()), IROrder(-1) {
850 assert(Ptr && "null SDNode");
852 SDLoc(const Instruction *I, int Order) : Ptr(I), IROrder(Order) {
853 assert(Order >= 0 && "bad IROrder");
855 unsigned getIROrder() {
856 if (IROrder >= 0 || Ptr == nullptr) {
857 return (unsigned)IROrder;
859 const SDNode *N = (const SDNode*)(Ptr);
860 return N->getIROrder();
862 DebugLoc getDebugLoc() {
867 const Instruction *I = (const Instruction*)(Ptr);
868 return I->getDebugLoc();
870 const SDNode *N = (const SDNode*)(Ptr);
871 return N->getDebugLoc();
876 // Define inline functions from the SDValue class.
878 inline SDValue::SDValue(SDNode *node, unsigned resno)
879 : Node(node), ResNo(resno) {
880 assert((!Node || ResNo < Node->getNumValues()) &&
881 "Invalid result number for the given node!");
882 assert(ResNo < -2U && "Cannot use result numbers reserved for DenseMaps.");
885 inline unsigned SDValue::getOpcode() const {
886 return Node->getOpcode();
888 inline EVT SDValue::getValueType() const {
889 return Node->getValueType(ResNo);
891 inline unsigned SDValue::getNumOperands() const {
892 return Node->getNumOperands();
894 inline const SDValue &SDValue::getOperand(unsigned i) const {
895 return Node->getOperand(i);
897 inline uint64_t SDValue::getConstantOperandVal(unsigned i) const {
898 return Node->getConstantOperandVal(i);
900 inline bool SDValue::isTargetOpcode() const {
901 return Node->isTargetOpcode();
903 inline bool SDValue::isTargetMemoryOpcode() const {
904 return Node->isTargetMemoryOpcode();
906 inline bool SDValue::isMachineOpcode() const {
907 return Node->isMachineOpcode();
909 inline unsigned SDValue::getMachineOpcode() const {
910 return Node->getMachineOpcode();
912 inline bool SDValue::use_empty() const {
913 return !Node->hasAnyUseOfValue(ResNo);
915 inline bool SDValue::hasOneUse() const {
916 return Node->hasNUsesOfValue(1, ResNo);
918 inline const DebugLoc &SDValue::getDebugLoc() const {
919 return Node->getDebugLoc();
921 inline void SDValue::dump() const {
924 inline void SDValue::dumpr() const {
925 return Node->dumpr();
927 // Define inline functions from the SDUse class.
929 inline void SDUse::set(const SDValue &V) {
930 if (Val.getNode()) removeFromList();
932 if (V.getNode()) V.getNode()->addUse(*this);
935 inline void SDUse::setInitial(const SDValue &V) {
937 V.getNode()->addUse(*this);
940 inline void SDUse::setNode(SDNode *N) {
941 if (Val.getNode()) removeFromList();
943 if (N) N->addUse(*this);
946 /// This class is used for single-operand SDNodes. This is solely
947 /// to allow co-allocation of node operands with the node itself.
948 class UnarySDNode : public SDNode {
951 UnarySDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs,
953 : SDNode(Opc, Order, dl, VTs) {
954 InitOperands(&Op, X);
958 /// This class is used for two-operand SDNodes. This is solely
959 /// to allow co-allocation of node operands with the node itself.
960 class BinarySDNode : public SDNode {
963 BinarySDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs,
964 SDValue X, SDValue Y)
965 : SDNode(Opc, Order, dl, VTs) {
966 InitOperands(Ops, X, Y);
970 /// This class is an extension of BinarySDNode
971 /// used from those opcodes that have associated extra flags.
972 class BinaryWithFlagsSDNode : public BinarySDNode {
973 enum { NUW = (1 << 0), NSW = (1 << 1), EXACT = (1 << 2) };
976 BinaryWithFlagsSDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs,
977 SDValue X, SDValue Y)
978 : BinarySDNode(Opc, Order, dl, VTs, X, Y) {}
979 /// Return the SubclassData value, which contains an encoding of the flags.
980 /// This function should be used to add subclass data to the NodeID value.
981 unsigned getRawSubclassData() const { return SubclassData; }
982 void setHasNoUnsignedWrap(bool b) {
983 SubclassData = (SubclassData & ~NUW) | (b ? NUW : 0);
985 void setHasNoSignedWrap(bool b) {
986 SubclassData = (SubclassData & ~NSW) | (b ? NSW : 0);
988 void setIsExact(bool b) {
989 SubclassData = (SubclassData & ~EXACT) | (b ? EXACT : 0);
991 bool hasNoUnsignedWrap() const { return SubclassData & NUW; }
992 bool hasNoSignedWrap() const { return SubclassData & NSW; }
993 bool isExact() const { return SubclassData & EXACT; }
994 static bool classof(const SDNode *N) {
995 return isBinOpWithFlags(N->getOpcode());
999 /// This class is used for three-operand SDNodes. This is solely
1000 /// to allow co-allocation of node operands with the node itself.
1001 class TernarySDNode : public SDNode {
1004 TernarySDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs,
1005 SDValue X, SDValue Y, SDValue Z)
1006 : SDNode(Opc, Order, dl, VTs) {
1007 InitOperands(Ops, X, Y, Z);
1012 /// This class is used to form a handle around another node that
1013 /// is persistent and is updated across invocations of replaceAllUsesWith on its
1014 /// operand. This node should be directly created by end-users and not added to
1015 /// the AllNodes list.
1016 class HandleSDNode : public SDNode {
1019 explicit HandleSDNode(SDValue X)
1020 : SDNode(ISD::HANDLENODE, 0, DebugLoc(), getSDVTList(MVT::Other)) {
1021 InitOperands(&Op, X);
1024 const SDValue &getValue() const { return Op; }
1027 class AddrSpaceCastSDNode : public UnarySDNode {
1029 unsigned SrcAddrSpace;
1030 unsigned DestAddrSpace;
1033 AddrSpaceCastSDNode(unsigned Order, DebugLoc dl, EVT VT, SDValue X,
1034 unsigned SrcAS, unsigned DestAS);
1036 unsigned getSrcAddressSpace() const { return SrcAddrSpace; }
1037 unsigned getDestAddressSpace() const { return DestAddrSpace; }
1039 static bool classof(const SDNode *N) {
1040 return N->getOpcode() == ISD::ADDRSPACECAST;
1044 /// Abstact virtual class for operations for memory operations
1045 class MemSDNode : public SDNode {
1047 // VT of in-memory value.
1051 /// Memory reference information.
1052 MachineMemOperand *MMO;
1055 MemSDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs,
1056 EVT MemoryVT, MachineMemOperand *MMO);
1058 MemSDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs,
1059 ArrayRef<SDValue> Ops, EVT MemoryVT, MachineMemOperand *MMO);
1061 bool readMem() const { return MMO->isLoad(); }
1062 bool writeMem() const { return MMO->isStore(); }
1064 /// Returns alignment and volatility of the memory access
1065 unsigned getOriginalAlignment() const {
1066 return MMO->getBaseAlignment();
1068 unsigned getAlignment() const {
1069 return MMO->getAlignment();
1072 /// Return the SubclassData value, which contains an
1073 /// encoding of the volatile flag, as well as bits used by subclasses. This
1074 /// function should only be used to compute a FoldingSetNodeID value.
1075 unsigned getRawSubclassData() const {
1076 return SubclassData;
1079 // We access subclass data here so that we can check consistency
1080 // with MachineMemOperand information.
1081 bool isVolatile() const { return (SubclassData >> 5) & 1; }
1082 bool isNonTemporal() const { return (SubclassData >> 6) & 1; }
1083 bool isInvariant() const { return (SubclassData >> 7) & 1; }
1085 AtomicOrdering getOrdering() const {
1086 return AtomicOrdering((SubclassData >> 8) & 15);
1088 SynchronizationScope getSynchScope() const {
1089 return SynchronizationScope((SubclassData >> 12) & 1);
1092 // Returns the offset from the location of the access.
1093 int64_t getSrcValueOffset() const { return MMO->getOffset(); }
1095 /// Returns the AA info that describes the dereference.
1096 AAMDNodes getAAInfo() const { return MMO->getAAInfo(); }
1098 /// Returns the Ranges that describes the dereference.
1099 const MDNode *getRanges() const { return MMO->getRanges(); }
1101 /// Return the type of the in-memory value.
1102 EVT getMemoryVT() const { return MemoryVT; }
1104 /// Return a MachineMemOperand object describing the memory
1105 /// reference performed by operation.
1106 MachineMemOperand *getMemOperand() const { return MMO; }
1108 const MachinePointerInfo &getPointerInfo() const {
1109 return MMO->getPointerInfo();
1112 /// Return the address space for the associated pointer
1113 unsigned getAddressSpace() const {
1114 return getPointerInfo().getAddrSpace();
1117 /// Update this MemSDNode's MachineMemOperand information
1118 /// to reflect the alignment of NewMMO, if it has a greater alignment.
1119 /// This must only be used when the new alignment applies to all users of
1120 /// this MachineMemOperand.
1121 void refineAlignment(const MachineMemOperand *NewMMO) {
1122 MMO->refineAlignment(NewMMO);
1125 const SDValue &getChain() const { return getOperand(0); }
1126 const SDValue &getBasePtr() const {
1127 return getOperand(getOpcode() == ISD::STORE ? 2 : 1);
1130 // Methods to support isa and dyn_cast
1131 static bool classof(const SDNode *N) {
1132 // For some targets, we lower some target intrinsics to a MemIntrinsicNode
1133 // with either an intrinsic or a target opcode.
1134 return N->getOpcode() == ISD::LOAD ||
1135 N->getOpcode() == ISD::STORE ||
1136 N->getOpcode() == ISD::PREFETCH ||
1137 N->getOpcode() == ISD::ATOMIC_CMP_SWAP ||
1138 N->getOpcode() == ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS ||
1139 N->getOpcode() == ISD::ATOMIC_SWAP ||
1140 N->getOpcode() == ISD::ATOMIC_LOAD_ADD ||
1141 N->getOpcode() == ISD::ATOMIC_LOAD_SUB ||
1142 N->getOpcode() == ISD::ATOMIC_LOAD_AND ||
1143 N->getOpcode() == ISD::ATOMIC_LOAD_OR ||
1144 N->getOpcode() == ISD::ATOMIC_LOAD_XOR ||
1145 N->getOpcode() == ISD::ATOMIC_LOAD_NAND ||
1146 N->getOpcode() == ISD::ATOMIC_LOAD_MIN ||
1147 N->getOpcode() == ISD::ATOMIC_LOAD_MAX ||
1148 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN ||
1149 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX ||
1150 N->getOpcode() == ISD::ATOMIC_LOAD ||
1151 N->getOpcode() == ISD::ATOMIC_STORE ||
1152 N->getOpcode() == ISD::MLOAD ||
1153 N->getOpcode() == ISD::MSTORE ||
1154 N->isMemIntrinsic() ||
1155 N->isTargetMemoryOpcode();
1159 /// A SDNode reprenting atomic operations.
1160 class AtomicSDNode : public MemSDNode {
1163 /// For cmpxchg instructions, the ordering requirements when a store does not
1165 AtomicOrdering FailureOrdering;
1167 void InitAtomic(AtomicOrdering SuccessOrdering,
1168 AtomicOrdering FailureOrdering,
1169 SynchronizationScope SynchScope) {
1170 // This must match encodeMemSDNodeFlags() in SelectionDAG.cpp.
1171 assert((SuccessOrdering & 15) == SuccessOrdering &&
1172 "Ordering may not require more than 4 bits!");
1173 assert((FailureOrdering & 15) == FailureOrdering &&
1174 "Ordering may not require more than 4 bits!");
1175 assert((SynchScope & 1) == SynchScope &&
1176 "SynchScope may not require more than 1 bit!");
1177 SubclassData |= SuccessOrdering << 8;
1178 SubclassData |= SynchScope << 12;
1179 this->FailureOrdering = FailureOrdering;
1180 assert(getSuccessOrdering() == SuccessOrdering &&
1181 "Ordering encoding error!");
1182 assert(getFailureOrdering() == FailureOrdering &&
1183 "Ordering encoding error!");
1184 assert(getSynchScope() == SynchScope && "Synch-scope encoding error!");
1188 // Opc: opcode for atomic
1189 // VTL: value type list
1190 // Chain: memory chain for operaand
1191 // Ptr: address to update as a SDValue
1192 // Cmp: compare value
1194 // SrcVal: address to update as a Value (used for MemOperand)
1195 // Align: alignment of memory
1196 AtomicSDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTL,
1197 EVT MemVT, SDValue Chain, SDValue Ptr, SDValue Cmp, SDValue Swp,
1198 MachineMemOperand *MMO, AtomicOrdering Ordering,
1199 SynchronizationScope SynchScope)
1200 : MemSDNode(Opc, Order, dl, VTL, MemVT, MMO) {
1201 InitAtomic(Ordering, Ordering, SynchScope);
1202 InitOperands(Ops, Chain, Ptr, Cmp, Swp);
1204 AtomicSDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTL,
1206 SDValue Chain, SDValue Ptr,
1207 SDValue Val, MachineMemOperand *MMO,
1208 AtomicOrdering Ordering, SynchronizationScope SynchScope)
1209 : MemSDNode(Opc, Order, dl, VTL, MemVT, MMO) {
1210 InitAtomic(Ordering, Ordering, SynchScope);
1211 InitOperands(Ops, Chain, Ptr, Val);
1213 AtomicSDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTL,
1215 SDValue Chain, SDValue Ptr,
1216 MachineMemOperand *MMO,
1217 AtomicOrdering Ordering, SynchronizationScope SynchScope)
1218 : MemSDNode(Opc, Order, dl, VTL, MemVT, MMO) {
1219 InitAtomic(Ordering, Ordering, SynchScope);
1220 InitOperands(Ops, Chain, Ptr);
1222 AtomicSDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTL, EVT MemVT,
1223 const SDValue* AllOps, SDUse *DynOps, unsigned NumOps,
1224 MachineMemOperand *MMO,
1225 AtomicOrdering SuccessOrdering, AtomicOrdering FailureOrdering,
1226 SynchronizationScope SynchScope)
1227 : MemSDNode(Opc, Order, dl, VTL, MemVT, MMO) {
1228 InitAtomic(SuccessOrdering, FailureOrdering, SynchScope);
1229 assert((DynOps || NumOps <= array_lengthof(Ops)) &&
1230 "Too many ops for internal storage!");
1231 InitOperands(DynOps ? DynOps : Ops, AllOps, NumOps);
1234 const SDValue &getBasePtr() const { return getOperand(1); }
1235 const SDValue &getVal() const { return getOperand(2); }
1237 AtomicOrdering getSuccessOrdering() const {
1238 return getOrdering();
1241 // Not quite enough room in SubclassData for everything, so failure gets its
1243 AtomicOrdering getFailureOrdering() const {
1244 return FailureOrdering;
1247 bool isCompareAndSwap() const {
1248 unsigned Op = getOpcode();
1249 return Op == ISD::ATOMIC_CMP_SWAP || Op == ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS;
1252 // Methods to support isa and dyn_cast
1253 static bool classof(const SDNode *N) {
1254 return N->getOpcode() == ISD::ATOMIC_CMP_SWAP ||
1255 N->getOpcode() == ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS ||
1256 N->getOpcode() == ISD::ATOMIC_SWAP ||
1257 N->getOpcode() == ISD::ATOMIC_LOAD_ADD ||
1258 N->getOpcode() == ISD::ATOMIC_LOAD_SUB ||
1259 N->getOpcode() == ISD::ATOMIC_LOAD_AND ||
1260 N->getOpcode() == ISD::ATOMIC_LOAD_OR ||
1261 N->getOpcode() == ISD::ATOMIC_LOAD_XOR ||
1262 N->getOpcode() == ISD::ATOMIC_LOAD_NAND ||
1263 N->getOpcode() == ISD::ATOMIC_LOAD_MIN ||
1264 N->getOpcode() == ISD::ATOMIC_LOAD_MAX ||
1265 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN ||
1266 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX ||
1267 N->getOpcode() == ISD::ATOMIC_LOAD ||
1268 N->getOpcode() == ISD::ATOMIC_STORE;
1272 /// This SDNode is used for target intrinsics that touch
1273 /// memory and need an associated MachineMemOperand. Its opcode may be
1274 /// INTRINSIC_VOID, INTRINSIC_W_CHAIN, PREFETCH, or a target-specific opcode
1275 /// with a value not less than FIRST_TARGET_MEMORY_OPCODE.
1276 class MemIntrinsicSDNode : public MemSDNode {
1278 MemIntrinsicSDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs,
1279 ArrayRef<SDValue> Ops, EVT MemoryVT,
1280 MachineMemOperand *MMO)
1281 : MemSDNode(Opc, Order, dl, VTs, Ops, MemoryVT, MMO) {
1282 SubclassData |= 1u << 13;
1285 // Methods to support isa and dyn_cast
1286 static bool classof(const SDNode *N) {
1287 // We lower some target intrinsics to their target opcode
1288 // early a node with a target opcode can be of this class
1289 return N->isMemIntrinsic() ||
1290 N->getOpcode() == ISD::PREFETCH ||
1291 N->isTargetMemoryOpcode();
1295 /// This SDNode is used to implement the code generator
1296 /// support for the llvm IR shufflevector instruction. It combines elements
1297 /// from two input vectors into a new input vector, with the selection and
1298 /// ordering of elements determined by an array of integers, referred to as
1299 /// the shuffle mask. For input vectors of width N, mask indices of 0..N-1
1300 /// refer to elements from the LHS input, and indices from N to 2N-1 the RHS.
1301 /// An index of -1 is treated as undef, such that the code generator may put
1302 /// any value in the corresponding element of the result.
1303 class ShuffleVectorSDNode : public SDNode {
1306 // The memory for Mask is owned by the SelectionDAG's OperandAllocator, and
1307 // is freed when the SelectionDAG object is destroyed.
1310 friend class SelectionDAG;
1311 ShuffleVectorSDNode(EVT VT, unsigned Order, DebugLoc dl, SDValue N1,
1312 SDValue N2, const int *M)
1313 : SDNode(ISD::VECTOR_SHUFFLE, Order, dl, getSDVTList(VT)), Mask(M) {
1314 InitOperands(Ops, N1, N2);
1318 ArrayRef<int> getMask() const {
1319 EVT VT = getValueType(0);
1320 return makeArrayRef(Mask, VT.getVectorNumElements());
1322 int getMaskElt(unsigned Idx) const {
1323 assert(Idx < getValueType(0).getVectorNumElements() && "Idx out of range!");
1327 bool isSplat() const { return isSplatMask(Mask, getValueType(0)); }
1328 int getSplatIndex() const {
1329 assert(isSplat() && "Cannot get splat index for non-splat!");
1330 EVT VT = getValueType(0);
1331 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i) {
1335 llvm_unreachable("Splat with all undef indices?");
1337 static bool isSplatMask(const int *Mask, EVT VT);
1339 /// Change values in a shuffle permute mask assuming
1340 /// the two vector operands have swapped position.
1341 static void commuteMask(SmallVectorImpl<int> &Mask) {
1342 unsigned NumElems = Mask.size();
1343 for (unsigned i = 0; i != NumElems; ++i) {
1347 else if (idx < (int)NumElems)
1348 Mask[i] = idx + NumElems;
1350 Mask[i] = idx - NumElems;
1354 static bool classof(const SDNode *N) {
1355 return N->getOpcode() == ISD::VECTOR_SHUFFLE;
1359 class ConstantSDNode : public SDNode {
1360 const ConstantInt *Value;
1361 friend class SelectionDAG;
1362 ConstantSDNode(bool isTarget, bool isOpaque, const ConstantInt *val, EVT VT)
1363 : SDNode(isTarget ? ISD::TargetConstant : ISD::Constant,
1364 0, DebugLoc(), getSDVTList(VT)), Value(val) {
1365 SubclassData |= (uint16_t)isOpaque;
1369 const ConstantInt *getConstantIntValue() const { return Value; }
1370 const APInt &getAPIntValue() const { return Value->getValue(); }
1371 uint64_t getZExtValue() const { return Value->getZExtValue(); }
1372 int64_t getSExtValue() const { return Value->getSExtValue(); }
1374 bool isOne() const { return Value->isOne(); }
1375 bool isNullValue() const { return Value->isNullValue(); }
1376 bool isAllOnesValue() const { return Value->isAllOnesValue(); }
1378 bool isOpaque() const { return SubclassData & 1; }
1380 static bool classof(const SDNode *N) {
1381 return N->getOpcode() == ISD::Constant ||
1382 N->getOpcode() == ISD::TargetConstant;
1386 class ConstantFPSDNode : public SDNode {
1387 const ConstantFP *Value;
1388 friend class SelectionDAG;
1389 ConstantFPSDNode(bool isTarget, const ConstantFP *val, EVT VT)
1390 : SDNode(isTarget ? ISD::TargetConstantFP : ISD::ConstantFP,
1391 0, DebugLoc(), getSDVTList(VT)), Value(val) {
1395 const APFloat& getValueAPF() const { return Value->getValueAPF(); }
1396 const ConstantFP *getConstantFPValue() const { return Value; }
1398 /// Return true if the value is positive or negative zero.
1399 bool isZero() const { return Value->isZero(); }
1401 /// Return true if the value is a NaN.
1402 bool isNaN() const { return Value->isNaN(); }
1404 /// Return true if the value is an infinity
1405 bool isInfinity() const { return Value->isInfinity(); }
1407 /// Return true if the value is negative.
1408 bool isNegative() const { return Value->isNegative(); }
1410 /// We don't rely on operator== working on double values, as
1411 /// it returns true for things that are clearly not equal, like -0.0 and 0.0.
1412 /// As such, this method can be used to do an exact bit-for-bit comparison of
1413 /// two floating point values.
1415 /// We leave the version with the double argument here because it's just so
1416 /// convenient to write "2.0" and the like. Without this function we'd
1417 /// have to duplicate its logic everywhere it's called.
1418 bool isExactlyValue(double V) const {
1421 Tmp.convert(Value->getValueAPF().getSemantics(),
1422 APFloat::rmNearestTiesToEven, &ignored);
1423 return isExactlyValue(Tmp);
1425 bool isExactlyValue(const APFloat& V) const;
1427 static bool isValueValidForType(EVT VT, const APFloat& Val);
1429 static bool classof(const SDNode *N) {
1430 return N->getOpcode() == ISD::ConstantFP ||
1431 N->getOpcode() == ISD::TargetConstantFP;
1435 class GlobalAddressSDNode : public SDNode {
1436 const GlobalValue *TheGlobal;
1438 unsigned char TargetFlags;
1439 friend class SelectionDAG;
1440 GlobalAddressSDNode(unsigned Opc, unsigned Order, DebugLoc DL,
1441 const GlobalValue *GA, EVT VT, int64_t o,
1442 unsigned char TargetFlags);
1445 const GlobalValue *getGlobal() const { return TheGlobal; }
1446 int64_t getOffset() const { return Offset; }
1447 unsigned char getTargetFlags() const { return TargetFlags; }
1448 // Return the address space this GlobalAddress belongs to.
1449 unsigned getAddressSpace() const;
1451 static bool classof(const SDNode *N) {
1452 return N->getOpcode() == ISD::GlobalAddress ||
1453 N->getOpcode() == ISD::TargetGlobalAddress ||
1454 N->getOpcode() == ISD::GlobalTLSAddress ||
1455 N->getOpcode() == ISD::TargetGlobalTLSAddress;
1459 class FrameIndexSDNode : public SDNode {
1461 friend class SelectionDAG;
1462 FrameIndexSDNode(int fi, EVT VT, bool isTarg)
1463 : SDNode(isTarg ? ISD::TargetFrameIndex : ISD::FrameIndex,
1464 0, DebugLoc(), getSDVTList(VT)), FI(fi) {
1468 int getIndex() const { return FI; }
1470 static bool classof(const SDNode *N) {
1471 return N->getOpcode() == ISD::FrameIndex ||
1472 N->getOpcode() == ISD::TargetFrameIndex;
1476 class JumpTableSDNode : public SDNode {
1478 unsigned char TargetFlags;
1479 friend class SelectionDAG;
1480 JumpTableSDNode(int jti, EVT VT, bool isTarg, unsigned char TF)
1481 : SDNode(isTarg ? ISD::TargetJumpTable : ISD::JumpTable,
1482 0, DebugLoc(), getSDVTList(VT)), JTI(jti), TargetFlags(TF) {
1486 int getIndex() const { return JTI; }
1487 unsigned char getTargetFlags() const { return TargetFlags; }
1489 static bool classof(const SDNode *N) {
1490 return N->getOpcode() == ISD::JumpTable ||
1491 N->getOpcode() == ISD::TargetJumpTable;
1495 class ConstantPoolSDNode : public SDNode {
1497 const Constant *ConstVal;
1498 MachineConstantPoolValue *MachineCPVal;
1500 int Offset; // It's a MachineConstantPoolValue if top bit is set.
1501 unsigned Alignment; // Minimum alignment requirement of CP (not log2 value).
1502 unsigned char TargetFlags;
1503 friend class SelectionDAG;
1504 ConstantPoolSDNode(bool isTarget, const Constant *c, EVT VT, int o,
1505 unsigned Align, unsigned char TF)
1506 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool, 0,
1507 DebugLoc(), getSDVTList(VT)), Offset(o), Alignment(Align),
1509 assert(Offset >= 0 && "Offset is too large");
1512 ConstantPoolSDNode(bool isTarget, MachineConstantPoolValue *v,
1513 EVT VT, int o, unsigned Align, unsigned char TF)
1514 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool, 0,
1515 DebugLoc(), getSDVTList(VT)), Offset(o), Alignment(Align),
1517 assert(Offset >= 0 && "Offset is too large");
1518 Val.MachineCPVal = v;
1519 Offset |= 1 << (sizeof(unsigned)*CHAR_BIT-1);
1523 bool isMachineConstantPoolEntry() const {
1527 const Constant *getConstVal() const {
1528 assert(!isMachineConstantPoolEntry() && "Wrong constantpool type");
1529 return Val.ConstVal;
1532 MachineConstantPoolValue *getMachineCPVal() const {
1533 assert(isMachineConstantPoolEntry() && "Wrong constantpool type");
1534 return Val.MachineCPVal;
1537 int getOffset() const {
1538 return Offset & ~(1 << (sizeof(unsigned)*CHAR_BIT-1));
1541 // Return the alignment of this constant pool object, which is either 0 (for
1542 // default alignment) or the desired value.
1543 unsigned getAlignment() const { return Alignment; }
1544 unsigned char getTargetFlags() const { return TargetFlags; }
1546 Type *getType() const;
1548 static bool classof(const SDNode *N) {
1549 return N->getOpcode() == ISD::ConstantPool ||
1550 N->getOpcode() == ISD::TargetConstantPool;
1554 /// Completely target-dependent object reference.
1555 class TargetIndexSDNode : public SDNode {
1556 unsigned char TargetFlags;
1559 friend class SelectionDAG;
1562 TargetIndexSDNode(int Idx, EVT VT, int64_t Ofs, unsigned char TF)
1563 : SDNode(ISD::TargetIndex, 0, DebugLoc(), getSDVTList(VT)),
1564 TargetFlags(TF), Index(Idx), Offset(Ofs) {}
1567 unsigned char getTargetFlags() const { return TargetFlags; }
1568 int getIndex() const { return Index; }
1569 int64_t getOffset() const { return Offset; }
1571 static bool classof(const SDNode *N) {
1572 return N->getOpcode() == ISD::TargetIndex;
1576 class BasicBlockSDNode : public SDNode {
1577 MachineBasicBlock *MBB;
1578 friend class SelectionDAG;
1579 /// Debug info is meaningful and potentially useful here, but we create
1580 /// blocks out of order when they're jumped to, which makes it a bit
1581 /// harder. Let's see if we need it first.
1582 explicit BasicBlockSDNode(MachineBasicBlock *mbb)
1583 : SDNode(ISD::BasicBlock, 0, DebugLoc(), getSDVTList(MVT::Other)), MBB(mbb)
1587 MachineBasicBlock *getBasicBlock() const { return MBB; }
1589 static bool classof(const SDNode *N) {
1590 return N->getOpcode() == ISD::BasicBlock;
1594 /// A "pseudo-class" with methods for operating on BUILD_VECTORs.
1595 class BuildVectorSDNode : public SDNode {
1596 // These are constructed as SDNodes and then cast to BuildVectorSDNodes.
1597 explicit BuildVectorSDNode() = delete;
1599 /// Check if this is a constant splat, and if so, find the
1600 /// smallest element size that splats the vector. If MinSplatBits is
1601 /// nonzero, the element size must be at least that large. Note that the
1602 /// splat element may be the entire vector (i.e., a one element vector).
1603 /// Returns the splat element value in SplatValue. Any undefined bits in
1604 /// that value are zero, and the corresponding bits in the SplatUndef mask
1605 /// are set. The SplatBitSize value is set to the splat element size in
1606 /// bits. HasAnyUndefs is set to true if any bits in the vector are
1607 /// undefined. isBigEndian describes the endianness of the target.
1608 bool isConstantSplat(APInt &SplatValue, APInt &SplatUndef,
1609 unsigned &SplatBitSize, bool &HasAnyUndefs,
1610 unsigned MinSplatBits = 0,
1611 bool isBigEndian = false) const;
1613 /// \brief Returns the splatted value or a null value if this is not a splat.
1615 /// If passed a non-null UndefElements bitvector, it will resize it to match
1616 /// the vector width and set the bits where elements are undef.
1617 SDValue getSplatValue(BitVector *UndefElements = nullptr) const;
1619 /// \brief Returns the splatted constant or null if this is not a constant
1622 /// If passed a non-null UndefElements bitvector, it will resize it to match
1623 /// the vector width and set the bits where elements are undef.
1625 getConstantSplatNode(BitVector *UndefElements = nullptr) const;
1627 /// \brief Returns the splatted constant FP or null if this is not a constant
1630 /// If passed a non-null UndefElements bitvector, it will resize it to match
1631 /// the vector width and set the bits where elements are undef.
1633 getConstantFPSplatNode(BitVector *UndefElements = nullptr) const;
1635 bool isConstant() const;
1637 static inline bool classof(const SDNode *N) {
1638 return N->getOpcode() == ISD::BUILD_VECTOR;
1642 /// An SDNode that holds an arbitrary LLVM IR Value. This is
1643 /// used when the SelectionDAG needs to make a simple reference to something
1644 /// in the LLVM IR representation.
1646 class SrcValueSDNode : public SDNode {
1648 friend class SelectionDAG;
1649 /// Create a SrcValue for a general value.
1650 explicit SrcValueSDNode(const Value *v)
1651 : SDNode(ISD::SRCVALUE, 0, DebugLoc(), getSDVTList(MVT::Other)), V(v) {}
1654 /// Return the contained Value.
1655 const Value *getValue() const { return V; }
1657 static bool classof(const SDNode *N) {
1658 return N->getOpcode() == ISD::SRCVALUE;
1662 class MDNodeSDNode : public SDNode {
1664 friend class SelectionDAG;
1665 explicit MDNodeSDNode(const MDNode *md)
1666 : SDNode(ISD::MDNODE_SDNODE, 0, DebugLoc(), getSDVTList(MVT::Other)), MD(md)
1670 const MDNode *getMD() const { return MD; }
1672 static bool classof(const SDNode *N) {
1673 return N->getOpcode() == ISD::MDNODE_SDNODE;
1677 class RegisterSDNode : public SDNode {
1679 friend class SelectionDAG;
1680 RegisterSDNode(unsigned reg, EVT VT)
1681 : SDNode(ISD::Register, 0, DebugLoc(), getSDVTList(VT)), Reg(reg) {
1685 unsigned getReg() const { return Reg; }
1687 static bool classof(const SDNode *N) {
1688 return N->getOpcode() == ISD::Register;
1692 class RegisterMaskSDNode : public SDNode {
1693 // The memory for RegMask is not owned by the node.
1694 const uint32_t *RegMask;
1695 friend class SelectionDAG;
1696 RegisterMaskSDNode(const uint32_t *mask)
1697 : SDNode(ISD::RegisterMask, 0, DebugLoc(), getSDVTList(MVT::Untyped)),
1701 const uint32_t *getRegMask() const { return RegMask; }
1703 static bool classof(const SDNode *N) {
1704 return N->getOpcode() == ISD::RegisterMask;
1708 class BlockAddressSDNode : public SDNode {
1709 const BlockAddress *BA;
1711 unsigned char TargetFlags;
1712 friend class SelectionDAG;
1713 BlockAddressSDNode(unsigned NodeTy, EVT VT, const BlockAddress *ba,
1714 int64_t o, unsigned char Flags)
1715 : SDNode(NodeTy, 0, DebugLoc(), getSDVTList(VT)),
1716 BA(ba), Offset(o), TargetFlags(Flags) {
1719 const BlockAddress *getBlockAddress() const { return BA; }
1720 int64_t getOffset() const { return Offset; }
1721 unsigned char getTargetFlags() const { return TargetFlags; }
1723 static bool classof(const SDNode *N) {
1724 return N->getOpcode() == ISD::BlockAddress ||
1725 N->getOpcode() == ISD::TargetBlockAddress;
1729 class EHLabelSDNode : public SDNode {
1732 friend class SelectionDAG;
1733 EHLabelSDNode(unsigned Order, DebugLoc dl, SDValue ch, MCSymbol *L)
1734 : SDNode(ISD::EH_LABEL, Order, dl, getSDVTList(MVT::Other)), Label(L) {
1735 InitOperands(&Chain, ch);
1738 MCSymbol *getLabel() const { return Label; }
1740 static bool classof(const SDNode *N) {
1741 return N->getOpcode() == ISD::EH_LABEL;
1745 class ExternalSymbolSDNode : public SDNode {
1747 unsigned char TargetFlags;
1749 friend class SelectionDAG;
1750 ExternalSymbolSDNode(bool isTarget, const char *Sym, unsigned char TF, EVT VT)
1751 : SDNode(isTarget ? ISD::TargetExternalSymbol : ISD::ExternalSymbol,
1752 0, DebugLoc(), getSDVTList(VT)), Symbol(Sym), TargetFlags(TF) {
1756 const char *getSymbol() const { return Symbol; }
1757 unsigned char getTargetFlags() const { return TargetFlags; }
1759 static bool classof(const SDNode *N) {
1760 return N->getOpcode() == ISD::ExternalSymbol ||
1761 N->getOpcode() == ISD::TargetExternalSymbol;
1765 class CondCodeSDNode : public SDNode {
1766 ISD::CondCode Condition;
1767 friend class SelectionDAG;
1768 explicit CondCodeSDNode(ISD::CondCode Cond)
1769 : SDNode(ISD::CONDCODE, 0, DebugLoc(), getSDVTList(MVT::Other)),
1774 ISD::CondCode get() const { return Condition; }
1776 static bool classof(const SDNode *N) {
1777 return N->getOpcode() == ISD::CONDCODE;
1781 /// NOTE: avoid using this node as this may disappear in the
1782 /// future and most targets don't support it.
1783 class CvtRndSatSDNode : public SDNode {
1784 ISD::CvtCode CvtCode;
1785 friend class SelectionDAG;
1786 explicit CvtRndSatSDNode(EVT VT, unsigned Order, DebugLoc dl,
1787 ArrayRef<SDValue> Ops, ISD::CvtCode Code)
1788 : SDNode(ISD::CONVERT_RNDSAT, Order, dl, getSDVTList(VT), Ops),
1790 assert(Ops.size() == 5 && "wrong number of operations");
1793 ISD::CvtCode getCvtCode() const { return CvtCode; }
1795 static bool classof(const SDNode *N) {
1796 return N->getOpcode() == ISD::CONVERT_RNDSAT;
1800 /// This class is used to represent EVT's, which are used
1801 /// to parameterize some operations.
1802 class VTSDNode : public SDNode {
1804 friend class SelectionDAG;
1805 explicit VTSDNode(EVT VT)
1806 : SDNode(ISD::VALUETYPE, 0, DebugLoc(), getSDVTList(MVT::Other)),
1811 EVT getVT() const { return ValueType; }
1813 static bool classof(const SDNode *N) {
1814 return N->getOpcode() == ISD::VALUETYPE;
1818 /// Base class for LoadSDNode and StoreSDNode
1819 class LSBaseSDNode : public MemSDNode {
1820 //! Operand array for load and store
1822 \note Moving this array to the base class captures more
1823 common functionality shared between LoadSDNode and
1828 LSBaseSDNode(ISD::NodeType NodeTy, unsigned Order, DebugLoc dl,
1829 SDValue *Operands, unsigned numOperands,
1830 SDVTList VTs, ISD::MemIndexedMode AM, EVT MemVT,
1831 MachineMemOperand *MMO)
1832 : MemSDNode(NodeTy, Order, dl, VTs, MemVT, MMO) {
1833 SubclassData |= AM << 2;
1834 assert(getAddressingMode() == AM && "MemIndexedMode encoding error!");
1835 InitOperands(Ops, Operands, numOperands);
1836 assert((getOffset().getOpcode() == ISD::UNDEF || isIndexed()) &&
1837 "Only indexed loads and stores have a non-undef offset operand");
1840 const SDValue &getOffset() const {
1841 return getOperand(getOpcode() == ISD::LOAD ? 2 : 3);
1844 /// Return the addressing mode for this load or store:
1845 /// unindexed, pre-inc, pre-dec, post-inc, or post-dec.
1846 ISD::MemIndexedMode getAddressingMode() const {
1847 return ISD::MemIndexedMode((SubclassData >> 2) & 7);
1850 /// Return true if this is a pre/post inc/dec load/store.
1851 bool isIndexed() const { return getAddressingMode() != ISD::UNINDEXED; }
1853 /// Return true if this is NOT a pre/post inc/dec load/store.
1854 bool isUnindexed() const { return getAddressingMode() == ISD::UNINDEXED; }
1856 static bool classof(const SDNode *N) {
1857 return N->getOpcode() == ISD::LOAD ||
1858 N->getOpcode() == ISD::STORE;
1862 /// This class is used to represent ISD::LOAD nodes.
1863 class LoadSDNode : public LSBaseSDNode {
1864 friend class SelectionDAG;
1865 LoadSDNode(SDValue *ChainPtrOff, unsigned Order, DebugLoc dl, SDVTList VTs,
1866 ISD::MemIndexedMode AM, ISD::LoadExtType ETy, EVT MemVT,
1867 MachineMemOperand *MMO)
1868 : LSBaseSDNode(ISD::LOAD, Order, dl, ChainPtrOff, 3, VTs, AM, MemVT, MMO) {
1869 SubclassData |= (unsigned short)ETy;
1870 assert(getExtensionType() == ETy && "LoadExtType encoding error!");
1871 assert(readMem() && "Load MachineMemOperand is not a load!");
1872 assert(!writeMem() && "Load MachineMemOperand is a store!");
1876 /// Return whether this is a plain node,
1877 /// or one of the varieties of value-extending loads.
1878 ISD::LoadExtType getExtensionType() const {
1879 return ISD::LoadExtType(SubclassData & 3);
1882 const SDValue &getBasePtr() const { return getOperand(1); }
1883 const SDValue &getOffset() const { return getOperand(2); }
1885 static bool classof(const SDNode *N) {
1886 return N->getOpcode() == ISD::LOAD;
1890 /// This class is used to represent ISD::STORE nodes.
1891 class StoreSDNode : public LSBaseSDNode {
1892 friend class SelectionDAG;
1893 StoreSDNode(SDValue *ChainValuePtrOff, unsigned Order, DebugLoc dl,
1894 SDVTList VTs, ISD::MemIndexedMode AM, bool isTrunc, EVT MemVT,
1895 MachineMemOperand *MMO)
1896 : LSBaseSDNode(ISD::STORE, Order, dl, ChainValuePtrOff, 4,
1897 VTs, AM, MemVT, MMO) {
1898 SubclassData |= (unsigned short)isTrunc;
1899 assert(isTruncatingStore() == isTrunc && "isTrunc encoding error!");
1900 assert(!readMem() && "Store MachineMemOperand is a load!");
1901 assert(writeMem() && "Store MachineMemOperand is not a store!");
1905 /// Return true if the op does a truncation before store.
1906 /// For integers this is the same as doing a TRUNCATE and storing the result.
1907 /// For floats, it is the same as doing an FP_ROUND and storing the result.
1908 bool isTruncatingStore() const { return SubclassData & 1; }
1910 const SDValue &getValue() const { return getOperand(1); }
1911 const SDValue &getBasePtr() const { return getOperand(2); }
1912 const SDValue &getOffset() const { return getOperand(3); }
1914 static bool classof(const SDNode *N) {
1915 return N->getOpcode() == ISD::STORE;
1919 /// This base class is used to represent MLOAD and MSTORE nodes
1920 class MaskedLoadStoreSDNode : public MemSDNode {
1924 friend class SelectionDAG;
1925 MaskedLoadStoreSDNode(ISD::NodeType NodeTy, unsigned Order, DebugLoc dl,
1926 SDValue *Operands, unsigned numOperands,
1927 SDVTList VTs, EVT MemVT, MachineMemOperand *MMO)
1928 : MemSDNode(NodeTy, Order, dl, VTs, MemVT, MMO) {
1929 InitOperands(Ops, Operands, numOperands);
1932 // In the both nodes address is Op1, mask is Op2:
1933 // MaskedLoadSDNode (Chain, ptr, mask, src0), src0 is a passthru value
1934 // MaskedStoreSDNode (Chain, ptr, mask, data)
1935 // Mask is a vector of i1 elements
1936 const SDValue &getBasePtr() const { return getOperand(1); }
1937 const SDValue &getMask() const { return getOperand(2); }
1939 static bool classof(const SDNode *N) {
1940 return N->getOpcode() == ISD::MLOAD ||
1941 N->getOpcode() == ISD::MSTORE;
1945 /// This class is used to represent an MLOAD node
1946 class MaskedLoadSDNode : public MaskedLoadStoreSDNode {
1948 friend class SelectionDAG;
1949 MaskedLoadSDNode(unsigned Order, DebugLoc dl, SDValue *Operands,
1950 unsigned numOperands, SDVTList VTs, ISD::LoadExtType ETy,
1951 EVT MemVT, MachineMemOperand *MMO)
1952 : MaskedLoadStoreSDNode(ISD::MLOAD, Order, dl, Operands, numOperands,
1954 SubclassData |= (unsigned short)ETy;
1957 ISD::LoadExtType getExtensionType() const {
1958 return ISD::LoadExtType(SubclassData & 3);
1960 const SDValue &getSrc0() const { return getOperand(3); }
1961 static bool classof(const SDNode *N) {
1962 return N->getOpcode() == ISD::MLOAD;
1966 /// This class is used to represent an MSTORE node
1967 class MaskedStoreSDNode : public MaskedLoadStoreSDNode {
1970 friend class SelectionDAG;
1971 MaskedStoreSDNode(unsigned Order, DebugLoc dl, SDValue *Operands,
1972 unsigned numOperands, SDVTList VTs, bool isTrunc, EVT MemVT,
1973 MachineMemOperand *MMO)
1974 : MaskedLoadStoreSDNode(ISD::MSTORE, Order, dl, Operands, numOperands,
1976 SubclassData |= (unsigned short)isTrunc;
1978 /// Return true if the op does a truncation before store.
1979 /// For integers this is the same as doing a TRUNCATE and storing the result.
1980 /// For floats, it is the same as doing an FP_ROUND and storing the result.
1981 bool isTruncatingStore() const { return SubclassData & 1; }
1983 const SDValue &getValue() const { return getOperand(3); }
1985 static bool classof(const SDNode *N) {
1986 return N->getOpcode() == ISD::MSTORE;
1990 /// An SDNode that represents everything that will be needed
1991 /// to construct a MachineInstr. These nodes are created during the
1992 /// instruction selection proper phase.
1993 class MachineSDNode : public SDNode {
1995 typedef MachineMemOperand **mmo_iterator;
1998 friend class SelectionDAG;
1999 MachineSDNode(unsigned Opc, unsigned Order, const DebugLoc DL, SDVTList VTs)
2000 : SDNode(Opc, Order, DL, VTs), MemRefs(nullptr), MemRefsEnd(nullptr) {}
2002 /// Operands for this instruction, if they fit here. If
2003 /// they don't, this field is unused.
2004 SDUse LocalOperands[4];
2006 /// Memory reference descriptions for this instruction.
2007 mmo_iterator MemRefs;
2008 mmo_iterator MemRefsEnd;
2011 mmo_iterator memoperands_begin() const { return MemRefs; }
2012 mmo_iterator memoperands_end() const { return MemRefsEnd; }
2013 bool memoperands_empty() const { return MemRefsEnd == MemRefs; }
2015 /// Assign this MachineSDNodes's memory reference descriptor
2016 /// list. This does not transfer ownership.
2017 void setMemRefs(mmo_iterator NewMemRefs, mmo_iterator NewMemRefsEnd) {
2018 for (mmo_iterator MMI = NewMemRefs, MME = NewMemRefsEnd; MMI != MME; ++MMI)
2019 assert(*MMI && "Null mem ref detected!");
2020 MemRefs = NewMemRefs;
2021 MemRefsEnd = NewMemRefsEnd;
2024 static bool classof(const SDNode *N) {
2025 return N->isMachineOpcode();
2029 class SDNodeIterator : public std::iterator<std::forward_iterator_tag,
2030 SDNode, ptrdiff_t> {
2034 SDNodeIterator(const SDNode *N, unsigned Op) : Node(N), Operand(Op) {}
2036 bool operator==(const SDNodeIterator& x) const {
2037 return Operand == x.Operand;
2039 bool operator!=(const SDNodeIterator& x) const { return !operator==(x); }
2041 pointer operator*() const {
2042 return Node->getOperand(Operand).getNode();
2044 pointer operator->() const { return operator*(); }
2046 SDNodeIterator& operator++() { // Preincrement
2050 SDNodeIterator operator++(int) { // Postincrement
2051 SDNodeIterator tmp = *this; ++*this; return tmp;
2053 size_t operator-(SDNodeIterator Other) const {
2054 assert(Node == Other.Node &&
2055 "Cannot compare iterators of two different nodes!");
2056 return Operand - Other.Operand;
2059 static SDNodeIterator begin(const SDNode *N) { return SDNodeIterator(N, 0); }
2060 static SDNodeIterator end (const SDNode *N) {
2061 return SDNodeIterator(N, N->getNumOperands());
2064 unsigned getOperand() const { return Operand; }
2065 const SDNode *getNode() const { return Node; }
2068 template <> struct GraphTraits<SDNode*> {
2069 typedef SDNode NodeType;
2070 typedef SDNodeIterator ChildIteratorType;
2071 static inline NodeType *getEntryNode(SDNode *N) { return N; }
2072 static inline ChildIteratorType child_begin(NodeType *N) {
2073 return SDNodeIterator::begin(N);
2075 static inline ChildIteratorType child_end(NodeType *N) {
2076 return SDNodeIterator::end(N);
2080 /// The largest SDNode class.
2081 typedef AtomicSDNode LargestSDNode;
2083 /// The SDNode class with the greatest alignment requirement.
2084 typedef GlobalAddressSDNode MostAlignedSDNode;
2087 /// Returns true if the specified node is a non-extending and unindexed load.
2088 inline bool isNormalLoad(const SDNode *N) {
2089 const LoadSDNode *Ld = dyn_cast<LoadSDNode>(N);
2090 return Ld && Ld->getExtensionType() == ISD::NON_EXTLOAD &&
2091 Ld->getAddressingMode() == ISD::UNINDEXED;
2094 /// Returns true if the specified node is a non-extending load.
2095 inline bool isNON_EXTLoad(const SDNode *N) {
2096 return isa<LoadSDNode>(N) &&
2097 cast<LoadSDNode>(N)->getExtensionType() == ISD::NON_EXTLOAD;
2100 /// Returns true if the specified node is a EXTLOAD.
2101 inline bool isEXTLoad(const SDNode *N) {
2102 return isa<LoadSDNode>(N) &&
2103 cast<LoadSDNode>(N)->getExtensionType() == ISD::EXTLOAD;
2106 /// Returns true if the specified node is a SEXTLOAD.
2107 inline bool isSEXTLoad(const SDNode *N) {
2108 return isa<LoadSDNode>(N) &&
2109 cast<LoadSDNode>(N)->getExtensionType() == ISD::SEXTLOAD;
2112 /// Returns true if the specified node is a ZEXTLOAD.
2113 inline bool isZEXTLoad(const SDNode *N) {
2114 return isa<LoadSDNode>(N) &&
2115 cast<LoadSDNode>(N)->getExtensionType() == ISD::ZEXTLOAD;
2118 /// Returns true if the specified node is an unindexed load.
2119 inline bool isUNINDEXEDLoad(const SDNode *N) {
2120 return isa<LoadSDNode>(N) &&
2121 cast<LoadSDNode>(N)->getAddressingMode() == ISD::UNINDEXED;
2124 /// Returns true if the specified node is a non-truncating
2125 /// and unindexed store.
2126 inline bool isNormalStore(const SDNode *N) {
2127 const StoreSDNode *St = dyn_cast<StoreSDNode>(N);
2128 return St && !St->isTruncatingStore() &&
2129 St->getAddressingMode() == ISD::UNINDEXED;
2132 /// Returns true if the specified node is a non-truncating store.
2133 inline bool isNON_TRUNCStore(const SDNode *N) {
2134 return isa<StoreSDNode>(N) && !cast<StoreSDNode>(N)->isTruncatingStore();
2137 /// Returns true if the specified node is a truncating store.
2138 inline bool isTRUNCStore(const SDNode *N) {
2139 return isa<StoreSDNode>(N) && cast<StoreSDNode>(N)->isTruncatingStore();
2142 /// Returns true if the specified node is an unindexed store.
2143 inline bool isUNINDEXEDStore(const SDNode *N) {
2144 return isa<StoreSDNode>(N) &&
2145 cast<StoreSDNode>(N)->getAddressingMode() == ISD::UNINDEXED;
2149 } // end llvm namespace