1 //===-- llvm/CodeGen/SelectionDAG.h - InstSelection DAG ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the SelectionDAG class, and transitively defines the
11 // SDNode class and subclasses.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CODEGEN_SELECTIONDAG_H
16 #define LLVM_CODEGEN_SELECTIONDAG_H
18 #include "llvm/CodeGen/SelectionDAGNodes.h"
19 #include "llvm/ADT/ilist"
28 class MachineDebugInfo;
29 class MachineFunction;
31 /// SelectionDAG class - This is used to represent a portion of an LLVM function
32 /// in a low-level Data Dependence DAG representation suitable for instruction
33 /// selection. This DAG is constructed as the first step of instruction
34 /// selection in order to allow implementation of machine specific optimizations
35 /// and code simplifications.
37 /// The representation used by the SelectionDAG is a target-independent
38 /// representation, which has some similarities to the GCC RTL representation,
39 /// but is significantly more simple, powerful, and is a graph form instead of a
47 // Root - The root of the entire DAG. EntryNode - The starting token.
48 SDOperand Root, EntryNode;
50 // AllNodes - A linked list of nodes in the current DAG.
51 ilist<SDNode> AllNodes;
53 // ValueNodes - track SrcValue nodes
54 std::map<std::pair<const Value*, int>, SDNode*> ValueNodes;
57 SelectionDAG(TargetLowering &tli, MachineFunction &mf, MachineDebugInfo *di)
58 : TLI(tli), MF(mf), DI(di) {
59 EntryNode = Root = getNode(ISD::EntryToken, MVT::Other);
63 MachineFunction &getMachineFunction() const { return MF; }
64 const TargetMachine &getTarget() const;
65 TargetLowering &getTargetLoweringInfo() const { return TLI; }
66 MachineDebugInfo *getMachineDebugInfo() const { return DI; }
68 /// viewGraph - Pop up a ghostview window with the DAG rendered using 'dot'.
73 typedef ilist<SDNode>::const_iterator allnodes_const_iterator;
74 allnodes_const_iterator allnodes_begin() const { return AllNodes.begin(); }
75 allnodes_const_iterator allnodes_end() const { return AllNodes.end(); }
76 typedef ilist<SDNode>::iterator allnodes_iterator;
77 allnodes_iterator allnodes_begin() { return AllNodes.begin(); }
78 allnodes_iterator allnodes_end() { return AllNodes.end(); }
80 /// getRoot - Return the root tag of the SelectionDAG.
82 const SDOperand &getRoot() const { return Root; }
84 /// getEntryNode - Return the token chain corresponding to the entry of the
86 const SDOperand &getEntryNode() const { return EntryNode; }
88 /// setRoot - Set the current root tag of the SelectionDAG.
90 const SDOperand &setRoot(SDOperand N) { return Root = N; }
92 /// Combine - This iterates over the nodes in the SelectionDAG, folding
93 /// certain types of nodes together, or eliminating superfluous nodes. When
94 /// the AfterLegalize argument is set to 'true', Combine takes care not to
95 /// generate any nodes that will be illegal on the target.
96 void Combine(bool AfterLegalize);
98 /// Legalize - This transforms the SelectionDAG into a SelectionDAG that is
99 /// compatible with the target instruction selector, as indicated by the
100 /// TargetLowering object.
102 /// Note that this is an involved process that may invalidate pointers into
106 /// RemoveDeadNodes - This method deletes all unreachable nodes in the
107 /// SelectionDAG, including nodes (like loads) that have uses of their token
108 /// chain but no other uses and no side effect. If a node is passed in as an
109 /// argument, it is used as the seed for node deletion.
110 void RemoveDeadNodes(SDNode *N = 0);
112 SDOperand getString(const std::string &Val);
113 SDOperand getConstant(uint64_t Val, MVT::ValueType VT);
114 SDOperand getTargetConstant(uint64_t Val, MVT::ValueType VT);
115 SDOperand getConstantFP(double Val, MVT::ValueType VT);
116 SDOperand getTargetConstantFP(double Val, MVT::ValueType VT);
117 SDOperand getGlobalAddress(const GlobalValue *GV, MVT::ValueType VT,
119 SDOperand getTargetGlobalAddress(const GlobalValue *GV, MVT::ValueType VT,
121 SDOperand getFrameIndex(int FI, MVT::ValueType VT);
122 SDOperand getTargetFrameIndex(int FI, MVT::ValueType VT);
123 SDOperand getConstantPool(Constant *C, MVT::ValueType VT);
124 SDOperand getTargetConstantPool(Constant *C, MVT::ValueType VT);
125 SDOperand getBasicBlock(MachineBasicBlock *MBB);
126 SDOperand getExternalSymbol(const char *Sym, MVT::ValueType VT);
127 SDOperand getTargetExternalSymbol(const char *Sym, MVT::ValueType VT);
128 SDOperand getValueType(MVT::ValueType);
129 SDOperand getRegister(unsigned Reg, MVT::ValueType VT);
131 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N) {
132 return getNode(ISD::CopyToReg, MVT::Other, Chain,
133 getRegister(Reg, N.getValueType()), N);
136 // This version of the getCopyToReg method takes an extra operand, which
137 // indicates that there is potentially an incoming flag value (if Flag is not
138 // null) and that there should be a flag result.
139 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N,
141 std::vector<MVT::ValueType> VTs;
142 VTs.push_back(MVT::Other);
143 VTs.push_back(MVT::Flag);
144 std::vector<SDOperand> Ops;
145 Ops.push_back(Chain);
146 Ops.push_back(getRegister(Reg, N.getValueType()));
148 if (Flag.Val) Ops.push_back(Flag);
149 return getNode(ISD::CopyToReg, VTs, Ops);
152 // Similar to last getCopyToReg() except parameter Reg is a SDOperand
153 SDOperand getCopyToReg(SDOperand Chain, SDOperand Reg, SDOperand N,
155 std::vector<MVT::ValueType> VTs;
156 VTs.push_back(MVT::Other);
157 VTs.push_back(MVT::Flag);
158 std::vector<SDOperand> Ops;
159 Ops.push_back(Chain);
162 if (Flag.Val) Ops.push_back(Flag);
163 return getNode(ISD::CopyToReg, VTs, Ops);
166 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT) {
167 std::vector<MVT::ValueType> ResultTys;
168 ResultTys.push_back(VT);
169 ResultTys.push_back(MVT::Other);
170 std::vector<SDOperand> Ops;
171 Ops.push_back(Chain);
172 Ops.push_back(getRegister(Reg, VT));
173 return getNode(ISD::CopyFromReg, ResultTys, Ops);
176 // This version of the getCopyFromReg method takes an extra operand, which
177 // indicates that there is potentially an incoming flag value (if Flag is not
178 // null) and that there should be a flag result.
179 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT,
181 std::vector<MVT::ValueType> ResultTys;
182 ResultTys.push_back(VT);
183 ResultTys.push_back(MVT::Other);
184 ResultTys.push_back(MVT::Flag);
185 std::vector<SDOperand> Ops;
186 Ops.push_back(Chain);
187 Ops.push_back(getRegister(Reg, VT));
188 if (Flag.Val) Ops.push_back(Flag);
189 return getNode(ISD::CopyFromReg, ResultTys, Ops);
192 SDOperand getCondCode(ISD::CondCode Cond);
194 /// getZeroExtendInReg - Return the expression required to zero extend the Op
195 /// value assuming it was the smaller SrcTy value.
196 SDOperand getZeroExtendInReg(SDOperand Op, MVT::ValueType SrcTy);
198 /// getNode - Gets or creates the specified node.
200 SDOperand getNode(unsigned Opcode, MVT::ValueType VT);
201 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N);
202 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
203 SDOperand N1, SDOperand N2);
204 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
205 SDOperand N1, SDOperand N2, SDOperand N3);
206 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
207 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4);
208 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
209 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4,
211 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
212 std::vector<SDOperand> &Children);
213 SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys,
214 std::vector<SDOperand> &Ops);
216 /// getSetCC - Helper function to make it easier to build SetCC's if you just
217 /// have an ISD::CondCode instead of an SDOperand.
219 SDOperand getSetCC(MVT::ValueType VT, SDOperand LHS, SDOperand RHS,
220 ISD::CondCode Cond) {
221 return getNode(ISD::SETCC, VT, LHS, RHS, getCondCode(Cond));
224 /// getSelectCC - Helper function to make it easier to build SelectCC's if you
225 /// just have an ISD::CondCode instead of an SDOperand.
227 SDOperand getSelectCC(SDOperand LHS, SDOperand RHS,
228 SDOperand True, SDOperand False, ISD::CondCode Cond) {
229 MVT::ValueType VT = True.getValueType();
230 return getNode(ISD::SELECT_CC, VT, LHS, RHS, True, False,getCondCode(Cond));
233 /// getVAArg - VAArg produces a result and token chain, and takes a pointer
234 /// and a source value as input.
235 SDOperand getVAArg(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
238 /// getLoad - Loads are not normal binary operators: their result type is not
239 /// determined by their operands, and they produce a value AND a token chain.
241 SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
243 SDOperand getVecLoad(unsigned Count, MVT::ValueType VT, SDOperand Chain,
244 SDOperand Ptr, SDOperand SV);
245 SDOperand getExtLoad(unsigned Opcode, MVT::ValueType VT, SDOperand Chain,
246 SDOperand Ptr, SDOperand SV, MVT::ValueType EVT);
248 // getSrcValue - construct a node to track a Value* through the backend
249 SDOperand getSrcValue(const Value* I, int offset = 0);
251 /// UpdateNodeOperands - *Mutate* the specified node in-place to have the
252 /// specified operands. If the resultant node already exists in the DAG,
253 /// this does not modify the specified node, instead it returns the node that
254 /// already exists. If the resultant node does not exist in the DAG, the
255 /// input node is returned. As a degenerate case, if you specify the same
256 /// input operands as the node already has, the input node is returned.
257 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op);
258 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2);
259 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
261 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
262 SDOperand Op3, SDOperand Op4);
263 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
264 SDOperand Op3, SDOperand Op4, SDOperand Op5);
265 SDOperand UpdateNodeOperands(SDOperand N, const std::vector<SDOperand> &Op);
267 /// SelectNodeTo - These are used for target selectors to *mutate* the
268 /// specified node to have the specified return type, Target opcode, and
269 /// operands. Note that target opcodes are stored as
270 /// ISD::BUILTIN_OP_END+TargetOpcode in the node opcode field. The 0th value
271 /// of the resultant node is returned.
272 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT);
273 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
275 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
276 SDOperand Op1, SDOperand Op2);
277 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
278 SDOperand Op1, SDOperand Op2, SDOperand Op3);
279 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
280 SDOperand Op1, SDOperand Op2, SDOperand Op3,
282 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
283 SDOperand Op1, SDOperand Op2, SDOperand Op3,
284 SDOperand Op4, SDOperand Op5);
285 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
286 SDOperand Op1, SDOperand Op2, SDOperand Op3,
287 SDOperand Op4, SDOperand Op5, SDOperand Op6);
288 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
289 SDOperand Op1, SDOperand Op2, SDOperand Op3,
290 SDOperand Op4, SDOperand Op5, SDOperand Op6,
292 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
293 SDOperand Op1, SDOperand Op2, SDOperand Op3,
294 SDOperand Op4, SDOperand Op5, SDOperand Op6,
295 SDOperand Op7, SDOperand Op8);
296 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
297 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2);
298 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
299 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
301 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
302 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
303 SDOperand Op3, SDOperand Op4);
304 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
305 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
306 SDOperand Op3, SDOperand Op4, SDOperand Op5);
308 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT) {
309 return getNode(ISD::BUILTIN_OP_END+Opcode, VT);
311 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
313 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1);
315 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
316 SDOperand Op1, SDOperand Op2) {
317 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2);
319 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
320 SDOperand Op1, SDOperand Op2, SDOperand Op3) {
321 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3);
323 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
324 SDOperand Op1, SDOperand Op2, SDOperand Op3,
326 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3, Op4);
328 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
329 SDOperand Op1, SDOperand Op2, SDOperand Op3,
330 SDOperand Op4, SDOperand Op5) {
331 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3, Op4, Op5);
333 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
334 SDOperand Op1, SDOperand Op2, SDOperand Op3,
335 SDOperand Op4, SDOperand Op5, SDOperand Op6) {
336 std::vector<SDOperand> Ops;
344 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
346 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
347 SDOperand Op1, SDOperand Op2, SDOperand Op3,
348 SDOperand Op4, SDOperand Op5, SDOperand Op6,
350 std::vector<SDOperand> Ops;
359 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
361 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
362 SDOperand Op1, SDOperand Op2, SDOperand Op3,
363 SDOperand Op4, SDOperand Op5, SDOperand Op6,
364 SDOperand Op7, SDOperand Op8) {
365 std::vector<SDOperand> Ops;
375 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
377 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
378 std::vector<SDOperand> &Ops) {
379 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
381 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
382 MVT::ValueType VT2, SDOperand Op1) {
383 std::vector<MVT::ValueType> ResultTys;
384 ResultTys.push_back(VT1);
385 ResultTys.push_back(VT2);
386 std::vector<SDOperand> Ops;
388 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
390 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
391 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2) {
392 std::vector<MVT::ValueType> ResultTys;
393 ResultTys.push_back(VT1);
394 ResultTys.push_back(VT2);
395 std::vector<SDOperand> Ops;
398 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
400 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
401 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
403 std::vector<MVT::ValueType> ResultTys;
404 ResultTys.push_back(VT1);
405 ResultTys.push_back(VT2);
406 std::vector<SDOperand> Ops;
410 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
412 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
413 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
414 SDOperand Op3, SDOperand Op4) {
415 std::vector<MVT::ValueType> ResultTys;
416 ResultTys.push_back(VT1);
417 ResultTys.push_back(VT2);
418 std::vector<SDOperand> Ops;
423 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
425 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
426 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
427 SDOperand Op3, SDOperand Op4, SDOperand Op5) {
428 std::vector<MVT::ValueType> ResultTys;
429 ResultTys.push_back(VT1);
430 ResultTys.push_back(VT2);
431 std::vector<SDOperand> Ops;
437 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
439 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
440 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
441 SDOperand Op3, SDOperand Op4, SDOperand Op5,
443 std::vector<MVT::ValueType> ResultTys;
444 ResultTys.push_back(VT1);
445 ResultTys.push_back(VT2);
446 std::vector<SDOperand> Ops;
453 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
455 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
456 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
457 SDOperand Op3, SDOperand Op4, SDOperand Op5,
458 SDOperand Op6, SDOperand Op7) {
459 std::vector<MVT::ValueType> ResultTys;
460 ResultTys.push_back(VT1);
461 ResultTys.push_back(VT2);
462 std::vector<SDOperand> Ops;
470 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
472 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
473 MVT::ValueType VT2, MVT::ValueType VT3,
474 SDOperand Op1, SDOperand Op2) {
475 std::vector<MVT::ValueType> ResultTys;
476 ResultTys.push_back(VT1);
477 ResultTys.push_back(VT2);
478 ResultTys.push_back(VT3);
479 std::vector<SDOperand> Ops;
482 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
484 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
485 MVT::ValueType VT2, MVT::ValueType VT3,
486 SDOperand Op1, SDOperand Op2,
487 SDOperand Op3, SDOperand Op4, SDOperand Op5) {
488 std::vector<MVT::ValueType> ResultTys;
489 ResultTys.push_back(VT1);
490 ResultTys.push_back(VT2);
491 ResultTys.push_back(VT3);
492 std::vector<SDOperand> Ops;
498 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
500 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
501 MVT::ValueType VT2, MVT::ValueType VT3,
502 SDOperand Op1, SDOperand Op2,
503 SDOperand Op3, SDOperand Op4, SDOperand Op5,
505 std::vector<MVT::ValueType> ResultTys;
506 ResultTys.push_back(VT1);
507 ResultTys.push_back(VT2);
508 ResultTys.push_back(VT3);
509 std::vector<SDOperand> Ops;
516 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
518 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
519 MVT::ValueType VT2, MVT::ValueType VT3,
520 SDOperand Op1, SDOperand Op2,
521 SDOperand Op3, SDOperand Op4, SDOperand Op5,
522 SDOperand Op6, SDOperand Op7) {
523 std::vector<MVT::ValueType> ResultTys;
524 ResultTys.push_back(VT1);
525 ResultTys.push_back(VT2);
526 ResultTys.push_back(VT3);
527 std::vector<SDOperand> Ops;
535 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
537 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
538 MVT::ValueType VT2, std::vector<SDOperand> &Ops) {
539 std::vector<MVT::ValueType> ResultTys;
540 ResultTys.push_back(VT1);
541 ResultTys.push_back(VT2);
542 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
545 /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
546 /// This can cause recursive merging of nodes in the DAG. Use the first
547 /// version if 'From' is known to have a single result, use the second
548 /// if you have two nodes with identical results, use the third otherwise.
550 /// These methods all take an optional vector, which (if not null) is
551 /// populated with any nodes that are deleted from the SelectionDAG, due to
552 /// new equivalences that are discovered.
554 void ReplaceAllUsesWith(SDOperand From, SDOperand Op,
555 std::vector<SDNode*> *Deleted = 0);
556 void ReplaceAllUsesWith(SDNode *From, SDNode *To,
557 std::vector<SDNode*> *Deleted = 0);
558 void ReplaceAllUsesWith(SDNode *From, const std::vector<SDOperand> &To,
559 std::vector<SDNode*> *Deleted = 0);
562 /// DeleteNode - Remove the specified node from the system. This node must
563 /// have no referrers.
564 void DeleteNode(SDNode *N);
569 void RemoveNodeFromCSEMaps(SDNode *N);
570 SDNode *AddNonLeafNodeToCSEMaps(SDNode *N);
571 SDNode **FindModifiedNodeSlot(SDNode *N, SDOperand Op);
572 SDNode **FindModifiedNodeSlot(SDNode *N, SDOperand Op1, SDOperand Op2);
573 SDNode **FindModifiedNodeSlot(SDNode *N, const std::vector<SDOperand> &Ops);
575 void DestroyDeadNode(SDNode *N);
576 void DeleteNodeNotInCSEMaps(SDNode *N);
577 void setNodeValueTypes(SDNode *N, std::vector<MVT::ValueType> &RetVals);
578 void setNodeValueTypes(SDNode *N, MVT::ValueType VT1, MVT::ValueType VT2);
581 /// SimplifySetCC - Try to simplify a setcc built with the specified operands
582 /// and cc. If unable to simplify it, return a null SDOperand.
583 SDOperand SimplifySetCC(MVT::ValueType VT, SDOperand N1,
584 SDOperand N2, ISD::CondCode Cond);
586 // List of non-single value types.
587 std::list<std::vector<MVT::ValueType> > VTList;
589 // Maps to auto-CSE operations.
590 std::map<std::pair<unsigned, MVT::ValueType>, SDNode *> NullaryOps;
591 std::map<std::pair<unsigned, std::pair<SDOperand, MVT::ValueType> >,
593 std::map<std::pair<unsigned, std::pair<SDOperand, SDOperand> >,
596 std::map<std::pair<unsigned, MVT::ValueType>, RegisterSDNode*> RegNodes;
597 std::vector<CondCodeSDNode*> CondCodeNodes;
599 std::map<std::pair<SDOperand, std::pair<SDOperand, MVT::ValueType> >,
602 std::map<std::pair<const GlobalValue*, int>, SDNode*> GlobalValues;
603 std::map<std::pair<const GlobalValue*, int>, SDNode*> TargetGlobalValues;
604 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> Constants;
605 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstants;
606 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs;
607 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstantFPs;
608 std::map<int, SDNode*> FrameIndices, TargetFrameIndices;
609 std::map<Constant *, SDNode*> ConstantPoolIndices;
610 std::map<Constant *, SDNode*> TargetConstantPoolIndices;
611 std::map<MachineBasicBlock *, SDNode*> BBNodes;
612 std::vector<SDNode*> ValueTypeNodes;
613 std::map<std::string, SDNode*> ExternalSymbols;
614 std::map<std::string, SDNode*> TargetExternalSymbols;
615 std::map<std::string, StringSDNode*> StringNodes;
616 std::map<std::pair<unsigned,
617 std::pair<MVT::ValueType, std::vector<SDOperand> > >,
618 SDNode*> OneResultNodes;
619 std::map<std::pair<unsigned,
620 std::pair<std::vector<MVT::ValueType>,
621 std::vector<SDOperand> > >,
622 SDNode*> ArbitraryNodes;
625 template <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> {
626 typedef SelectionDAG::allnodes_iterator nodes_iterator;
627 static nodes_iterator nodes_begin(SelectionDAG *G) {
628 return G->allnodes_begin();
630 static nodes_iterator nodes_end(SelectionDAG *G) {
631 return G->allnodes_end();
635 } // end namespace llvm