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 unsigned Alignment=0);
125 SDOperand getTargetConstantPool(Constant *C, MVT::ValueType VT,
126 unsigned Alignment=0);
127 SDOperand getBasicBlock(MachineBasicBlock *MBB);
128 SDOperand getExternalSymbol(const char *Sym, MVT::ValueType VT);
129 SDOperand getTargetExternalSymbol(const char *Sym, MVT::ValueType VT);
130 SDOperand getValueType(MVT::ValueType);
131 SDOperand getRegister(unsigned Reg, MVT::ValueType VT);
133 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N) {
134 return getNode(ISD::CopyToReg, MVT::Other, Chain,
135 getRegister(Reg, N.getValueType()), N);
138 // This version of the getCopyToReg method takes an extra operand, which
139 // indicates that there is potentially an incoming flag value (if Flag is not
140 // null) and that there should be a flag result.
141 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N,
143 std::vector<MVT::ValueType> VTs;
144 VTs.push_back(MVT::Other);
145 VTs.push_back(MVT::Flag);
146 std::vector<SDOperand> Ops;
147 Ops.push_back(Chain);
148 Ops.push_back(getRegister(Reg, N.getValueType()));
150 if (Flag.Val) Ops.push_back(Flag);
151 return getNode(ISD::CopyToReg, VTs, Ops);
154 // Similar to last getCopyToReg() except parameter Reg is a SDOperand
155 SDOperand getCopyToReg(SDOperand Chain, SDOperand Reg, SDOperand N,
157 std::vector<MVT::ValueType> VTs;
158 VTs.push_back(MVT::Other);
159 VTs.push_back(MVT::Flag);
160 std::vector<SDOperand> Ops;
161 Ops.push_back(Chain);
164 if (Flag.Val) Ops.push_back(Flag);
165 return getNode(ISD::CopyToReg, VTs, Ops);
168 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT) {
169 std::vector<MVT::ValueType> ResultTys;
170 ResultTys.push_back(VT);
171 ResultTys.push_back(MVT::Other);
172 std::vector<SDOperand> Ops;
173 Ops.push_back(Chain);
174 Ops.push_back(getRegister(Reg, VT));
175 return getNode(ISD::CopyFromReg, ResultTys, Ops);
178 // This version of the getCopyFromReg method takes an extra operand, which
179 // indicates that there is potentially an incoming flag value (if Flag is not
180 // null) and that there should be a flag result.
181 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT,
183 std::vector<MVT::ValueType> ResultTys;
184 ResultTys.push_back(VT);
185 ResultTys.push_back(MVT::Other);
186 ResultTys.push_back(MVT::Flag);
187 std::vector<SDOperand> Ops;
188 Ops.push_back(Chain);
189 Ops.push_back(getRegister(Reg, VT));
190 if (Flag.Val) Ops.push_back(Flag);
191 return getNode(ISD::CopyFromReg, ResultTys, Ops);
194 SDOperand getCondCode(ISD::CondCode Cond);
196 /// getZeroExtendInReg - Return the expression required to zero extend the Op
197 /// value assuming it was the smaller SrcTy value.
198 SDOperand getZeroExtendInReg(SDOperand Op, MVT::ValueType SrcTy);
200 /// getNode - Gets or creates the specified node.
202 SDOperand getNode(unsigned Opcode, MVT::ValueType VT);
203 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N);
204 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
205 SDOperand N1, SDOperand N2);
206 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
207 SDOperand N1, SDOperand N2, SDOperand N3);
208 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
209 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4);
210 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
211 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4,
213 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
214 std::vector<SDOperand> &Children);
215 SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys,
216 std::vector<SDOperand> &Ops);
218 /// getSetCC - Helper function to make it easier to build SetCC's if you just
219 /// have an ISD::CondCode instead of an SDOperand.
221 SDOperand getSetCC(MVT::ValueType VT, SDOperand LHS, SDOperand RHS,
222 ISD::CondCode Cond) {
223 return getNode(ISD::SETCC, VT, LHS, RHS, getCondCode(Cond));
226 /// getSelectCC - Helper function to make it easier to build SelectCC's if you
227 /// just have an ISD::CondCode instead of an SDOperand.
229 SDOperand getSelectCC(SDOperand LHS, SDOperand RHS,
230 SDOperand True, SDOperand False, ISD::CondCode Cond) {
231 MVT::ValueType VT = True.getValueType();
232 return getNode(ISD::SELECT_CC, VT, LHS, RHS, True, False,getCondCode(Cond));
235 /// getVAArg - VAArg produces a result and token chain, and takes a pointer
236 /// and a source value as input.
237 SDOperand getVAArg(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
240 /// getLoad - Loads are not normal binary operators: their result type is not
241 /// determined by their operands, and they produce a value AND a token chain.
243 SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
245 SDOperand getVecLoad(unsigned Count, MVT::ValueType VT, SDOperand Chain,
246 SDOperand Ptr, SDOperand SV);
247 SDOperand getExtLoad(unsigned Opcode, MVT::ValueType VT, SDOperand Chain,
248 SDOperand Ptr, SDOperand SV, MVT::ValueType EVT);
250 // getSrcValue - construct a node to track a Value* through the backend
251 SDOperand getSrcValue(const Value* I, int offset = 0);
253 /// UpdateNodeOperands - *Mutate* the specified node in-place to have the
254 /// specified operands. If the resultant node already exists in the DAG,
255 /// this does not modify the specified node, instead it returns the node that
256 /// already exists. If the resultant node does not exist in the DAG, the
257 /// input node is returned. As a degenerate case, if you specify the same
258 /// input operands as the node already has, the input node is returned.
259 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op);
260 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2);
261 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
263 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
264 SDOperand Op3, SDOperand Op4);
265 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
266 SDOperand Op3, SDOperand Op4, SDOperand Op5);
267 SDOperand UpdateNodeOperands(SDOperand N, const std::vector<SDOperand> &Op);
269 /// SelectNodeTo - These are used for target selectors to *mutate* the
270 /// specified node to have the specified return type, Target opcode, and
271 /// operands. Note that target opcodes are stored as
272 /// ISD::BUILTIN_OP_END+TargetOpcode in the node opcode field. The 0th value
273 /// of the resultant node is returned.
274 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT);
275 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
277 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
278 SDOperand Op1, SDOperand Op2);
279 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
280 SDOperand Op1, SDOperand Op2, SDOperand Op3);
281 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
282 SDOperand Op1, SDOperand Op2, SDOperand Op3,
284 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
285 SDOperand Op1, SDOperand Op2, SDOperand Op3,
286 SDOperand Op4, SDOperand Op5);
287 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
288 SDOperand Op1, SDOperand Op2, SDOperand Op3,
289 SDOperand Op4, SDOperand Op5, SDOperand Op6);
290 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
291 SDOperand Op1, SDOperand Op2, SDOperand Op3,
292 SDOperand Op4, SDOperand Op5, SDOperand Op6,
294 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
295 SDOperand Op1, SDOperand Op2, SDOperand Op3,
296 SDOperand Op4, SDOperand Op5, SDOperand Op6,
297 SDOperand Op7, SDOperand Op8);
298 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
299 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2);
300 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
301 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
303 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
304 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
305 SDOperand Op3, SDOperand Op4);
306 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
307 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
308 SDOperand Op3, SDOperand Op4, SDOperand Op5);
310 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT) {
311 return getNode(ISD::BUILTIN_OP_END+Opcode, VT);
313 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
315 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1);
317 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
318 SDOperand Op1, SDOperand Op2) {
319 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2);
321 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
322 SDOperand Op1, SDOperand Op2, SDOperand Op3) {
323 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3);
325 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
326 SDOperand Op1, SDOperand Op2, SDOperand Op3,
328 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3, Op4);
330 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
331 SDOperand Op1, SDOperand Op2, SDOperand Op3,
332 SDOperand Op4, SDOperand Op5) {
333 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3, Op4, Op5);
335 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
336 SDOperand Op1, SDOperand Op2, SDOperand Op3,
337 SDOperand Op4, SDOperand Op5, SDOperand Op6) {
338 std::vector<SDOperand> Ops;
346 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
348 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
349 SDOperand Op1, SDOperand Op2, SDOperand Op3,
350 SDOperand Op4, SDOperand Op5, SDOperand Op6,
352 std::vector<SDOperand> Ops;
361 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
363 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
364 SDOperand Op1, SDOperand Op2, SDOperand Op3,
365 SDOperand Op4, SDOperand Op5, SDOperand Op6,
366 SDOperand Op7, SDOperand Op8) {
367 std::vector<SDOperand> Ops;
377 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
379 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
380 std::vector<SDOperand> &Ops) {
381 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
383 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
384 MVT::ValueType VT2, SDOperand Op1) {
385 std::vector<MVT::ValueType> ResultTys;
386 ResultTys.push_back(VT1);
387 ResultTys.push_back(VT2);
388 std::vector<SDOperand> Ops;
390 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
392 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
393 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2) {
394 std::vector<MVT::ValueType> ResultTys;
395 ResultTys.push_back(VT1);
396 ResultTys.push_back(VT2);
397 std::vector<SDOperand> Ops;
400 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
402 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
403 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
405 std::vector<MVT::ValueType> ResultTys;
406 ResultTys.push_back(VT1);
407 ResultTys.push_back(VT2);
408 std::vector<SDOperand> Ops;
412 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
414 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
415 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
416 SDOperand Op3, SDOperand Op4) {
417 std::vector<MVT::ValueType> ResultTys;
418 ResultTys.push_back(VT1);
419 ResultTys.push_back(VT2);
420 std::vector<SDOperand> Ops;
425 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
427 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
428 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
429 SDOperand Op3, SDOperand Op4, SDOperand Op5) {
430 std::vector<MVT::ValueType> ResultTys;
431 ResultTys.push_back(VT1);
432 ResultTys.push_back(VT2);
433 std::vector<SDOperand> Ops;
439 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
441 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
442 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
443 SDOperand Op3, SDOperand Op4, SDOperand Op5,
445 std::vector<MVT::ValueType> ResultTys;
446 ResultTys.push_back(VT1);
447 ResultTys.push_back(VT2);
448 std::vector<SDOperand> Ops;
455 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
457 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
458 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
459 SDOperand Op3, SDOperand Op4, SDOperand Op5,
460 SDOperand Op6, SDOperand Op7) {
461 std::vector<MVT::ValueType> ResultTys;
462 ResultTys.push_back(VT1);
463 ResultTys.push_back(VT2);
464 std::vector<SDOperand> Ops;
472 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
474 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
475 MVT::ValueType VT2, MVT::ValueType VT3,
476 SDOperand Op1, SDOperand Op2) {
477 std::vector<MVT::ValueType> ResultTys;
478 ResultTys.push_back(VT1);
479 ResultTys.push_back(VT2);
480 ResultTys.push_back(VT3);
481 std::vector<SDOperand> Ops;
484 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
486 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
487 MVT::ValueType VT2, MVT::ValueType VT3,
488 SDOperand Op1, SDOperand Op2,
489 SDOperand Op3, SDOperand Op4, SDOperand Op5) {
490 std::vector<MVT::ValueType> ResultTys;
491 ResultTys.push_back(VT1);
492 ResultTys.push_back(VT2);
493 ResultTys.push_back(VT3);
494 std::vector<SDOperand> Ops;
500 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
502 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
503 MVT::ValueType VT2, MVT::ValueType VT3,
504 SDOperand Op1, SDOperand Op2,
505 SDOperand Op3, SDOperand Op4, SDOperand Op5,
507 std::vector<MVT::ValueType> ResultTys;
508 ResultTys.push_back(VT1);
509 ResultTys.push_back(VT2);
510 ResultTys.push_back(VT3);
511 std::vector<SDOperand> Ops;
518 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
520 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
521 MVT::ValueType VT2, MVT::ValueType VT3,
522 SDOperand Op1, SDOperand Op2,
523 SDOperand Op3, SDOperand Op4, SDOperand Op5,
524 SDOperand Op6, SDOperand Op7) {
525 std::vector<MVT::ValueType> ResultTys;
526 ResultTys.push_back(VT1);
527 ResultTys.push_back(VT2);
528 ResultTys.push_back(VT3);
529 std::vector<SDOperand> Ops;
537 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
539 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
540 MVT::ValueType VT2, std::vector<SDOperand> &Ops) {
541 std::vector<MVT::ValueType> ResultTys;
542 ResultTys.push_back(VT1);
543 ResultTys.push_back(VT2);
544 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
547 /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
548 /// This can cause recursive merging of nodes in the DAG. Use the first
549 /// version if 'From' is known to have a single result, use the second
550 /// if you have two nodes with identical results, use the third otherwise.
552 /// These methods all take an optional vector, which (if not null) is
553 /// populated with any nodes that are deleted from the SelectionDAG, due to
554 /// new equivalences that are discovered.
556 void ReplaceAllUsesWith(SDOperand From, SDOperand Op,
557 std::vector<SDNode*> *Deleted = 0);
558 void ReplaceAllUsesWith(SDNode *From, SDNode *To,
559 std::vector<SDNode*> *Deleted = 0);
560 void ReplaceAllUsesWith(SDNode *From, const std::vector<SDOperand> &To,
561 std::vector<SDNode*> *Deleted = 0);
564 /// DeleteNode - Remove the specified node from the system. This node must
565 /// have no referrers.
566 void DeleteNode(SDNode *N);
571 void RemoveNodeFromCSEMaps(SDNode *N);
572 SDNode *AddNonLeafNodeToCSEMaps(SDNode *N);
573 SDNode **FindModifiedNodeSlot(SDNode *N, SDOperand Op);
574 SDNode **FindModifiedNodeSlot(SDNode *N, SDOperand Op1, SDOperand Op2);
575 SDNode **FindModifiedNodeSlot(SDNode *N, const std::vector<SDOperand> &Ops);
577 void DestroyDeadNode(SDNode *N);
578 void DeleteNodeNotInCSEMaps(SDNode *N);
579 void setNodeValueTypes(SDNode *N, std::vector<MVT::ValueType> &RetVals);
580 void setNodeValueTypes(SDNode *N, MVT::ValueType VT1, MVT::ValueType VT2);
583 /// SimplifySetCC - Try to simplify a setcc built with the specified operands
584 /// and cc. If unable to simplify it, return a null SDOperand.
585 SDOperand SimplifySetCC(MVT::ValueType VT, SDOperand N1,
586 SDOperand N2, ISD::CondCode Cond);
588 // List of non-single value types.
589 std::list<std::vector<MVT::ValueType> > VTList;
591 // Maps to auto-CSE operations.
592 std::map<std::pair<unsigned, MVT::ValueType>, SDNode *> NullaryOps;
593 std::map<std::pair<unsigned, std::pair<SDOperand, MVT::ValueType> >,
595 std::map<std::pair<unsigned, std::pair<SDOperand, SDOperand> >,
598 std::map<std::pair<unsigned, MVT::ValueType>, RegisterSDNode*> RegNodes;
599 std::vector<CondCodeSDNode*> CondCodeNodes;
601 std::map<std::pair<SDOperand, std::pair<SDOperand, MVT::ValueType> >,
604 std::map<std::pair<const GlobalValue*, int>, SDNode*> GlobalValues;
605 std::map<std::pair<const GlobalValue*, int>, SDNode*> TargetGlobalValues;
606 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> Constants;
607 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstants;
608 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs;
609 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstantFPs;
610 std::map<int, SDNode*> FrameIndices, TargetFrameIndices;
611 std::map<std::pair<Constant *, unsigned>, SDNode*> ConstantPoolIndices;
612 std::map<std::pair<Constant *, unsigned>, SDNode*> TargetConstantPoolIndices;
613 std::map<MachineBasicBlock *, SDNode*> BBNodes;
614 std::vector<SDNode*> ValueTypeNodes;
615 std::map<std::string, SDNode*> ExternalSymbols;
616 std::map<std::string, SDNode*> TargetExternalSymbols;
617 std::map<std::string, StringSDNode*> StringNodes;
618 std::map<std::pair<unsigned,
619 std::pair<MVT::ValueType, std::vector<SDOperand> > >,
620 SDNode*> OneResultNodes;
621 std::map<std::pair<unsigned,
622 std::pair<std::vector<MVT::ValueType>,
623 std::vector<SDOperand> > >,
624 SDNode*> ArbitraryNodes;
627 template <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> {
628 typedef SelectionDAG::allnodes_iterator nodes_iterator;
629 static nodes_iterator nodes_begin(SelectionDAG *G) {
630 return G->allnodes_begin();
632 static nodes_iterator nodes_end(SelectionDAG *G) {
633 return G->allnodes_end();
637 } // end namespace llvm