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 getGlobalAddress(const GlobalValue *GV, MVT::ValueType VT,
118 SDOperand getTargetGlobalAddress(const GlobalValue *GV, MVT::ValueType VT,
120 SDOperand getFrameIndex(int FI, MVT::ValueType VT);
121 SDOperand getTargetFrameIndex(int FI, MVT::ValueType VT);
122 SDOperand getConstantPool(Constant *C, MVT::ValueType VT);
123 SDOperand getTargetConstantPool(Constant *C, MVT::ValueType VT);
124 SDOperand getBasicBlock(MachineBasicBlock *MBB);
125 SDOperand getExternalSymbol(const char *Sym, MVT::ValueType VT);
126 SDOperand getTargetExternalSymbol(const char *Sym, MVT::ValueType VT);
127 SDOperand getValueType(MVT::ValueType);
128 SDOperand getRegister(unsigned Reg, MVT::ValueType VT);
130 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N) {
131 return getNode(ISD::CopyToReg, MVT::Other, Chain,
132 getRegister(Reg, N.getValueType()), N);
135 // This version of the getCopyToReg method takes an extra operand, which
136 // indicates that there is potentially an incoming flag value (if Flag is not
137 // null) and that there should be a flag result.
138 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N,
140 std::vector<MVT::ValueType> VTs;
141 VTs.push_back(MVT::Other);
142 VTs.push_back(MVT::Flag);
143 std::vector<SDOperand> Ops;
144 Ops.push_back(Chain);
145 Ops.push_back(getRegister(Reg, N.getValueType()));
147 if (Flag.Val) Ops.push_back(Flag);
148 return getNode(ISD::CopyToReg, VTs, Ops);
151 // Similar to last getCopyToReg() except parameter Reg is a SDOperand
152 SDOperand getCopyToReg(SDOperand Chain, SDOperand Reg, SDOperand N,
154 std::vector<MVT::ValueType> VTs;
155 VTs.push_back(MVT::Other);
156 VTs.push_back(MVT::Flag);
157 std::vector<SDOperand> Ops;
158 Ops.push_back(Chain);
161 if (Flag.Val) Ops.push_back(Flag);
162 return getNode(ISD::CopyToReg, VTs, Ops);
165 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT) {
166 std::vector<MVT::ValueType> ResultTys;
167 ResultTys.push_back(VT);
168 ResultTys.push_back(MVT::Other);
169 std::vector<SDOperand> Ops;
170 Ops.push_back(Chain);
171 Ops.push_back(getRegister(Reg, VT));
172 return getNode(ISD::CopyFromReg, ResultTys, Ops);
175 // This version of the getCopyFromReg method takes an extra operand, which
176 // indicates that there is potentially an incoming flag value (if Flag is not
177 // null) and that there should be a flag result.
178 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT,
180 std::vector<MVT::ValueType> ResultTys;
181 ResultTys.push_back(VT);
182 ResultTys.push_back(MVT::Other);
183 ResultTys.push_back(MVT::Flag);
184 std::vector<SDOperand> Ops;
185 Ops.push_back(Chain);
186 Ops.push_back(getRegister(Reg, VT));
187 if (Flag.Val) Ops.push_back(Flag);
188 return getNode(ISD::CopyFromReg, ResultTys, Ops);
191 SDOperand getCondCode(ISD::CondCode Cond);
193 /// getZeroExtendInReg - Return the expression required to zero extend the Op
194 /// value assuming it was the smaller SrcTy value.
195 SDOperand getZeroExtendInReg(SDOperand Op, MVT::ValueType SrcTy);
197 /// getNode - Gets or creates the specified node.
199 SDOperand getNode(unsigned Opcode, MVT::ValueType VT);
200 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N);
201 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
202 SDOperand N1, SDOperand N2);
203 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
204 SDOperand N1, SDOperand N2, SDOperand N3);
205 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
206 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4);
207 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
208 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4,
210 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
211 std::vector<SDOperand> &Children);
212 SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys,
213 std::vector<SDOperand> &Ops);
215 /// getSetCC - Helper function to make it easier to build SetCC's if you just
216 /// have an ISD::CondCode instead of an SDOperand.
218 SDOperand getSetCC(MVT::ValueType VT, SDOperand LHS, SDOperand RHS,
219 ISD::CondCode Cond) {
220 return getNode(ISD::SETCC, VT, LHS, RHS, getCondCode(Cond));
223 /// getSelectCC - Helper function to make it easier to build SelectCC's if you
224 /// just have an ISD::CondCode instead of an SDOperand.
226 SDOperand getSelectCC(SDOperand LHS, SDOperand RHS,
227 SDOperand True, SDOperand False, ISD::CondCode Cond) {
228 MVT::ValueType VT = True.getValueType();
229 return getNode(ISD::SELECT_CC, VT, LHS, RHS, True, False,getCondCode(Cond));
232 /// getBR2Way_CC - Helper function to make it easier to build BRTWOWAY_CC
235 SDOperand getBR2Way_CC(SDOperand Chain, SDOperand CCNode, SDOperand LHS,
236 SDOperand RHS, SDOperand True, SDOperand False) {
237 std::vector<SDOperand> Ops;
238 Ops.push_back(Chain);
239 Ops.push_back(CCNode);
243 Ops.push_back(False);
244 return getNode(ISD::BRTWOWAY_CC, MVT::Other, Ops);
247 /// getVAArg - VAArg produces a result and token chain, and takes a pointer
248 /// and a source value as input.
249 SDOperand getVAArg(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
252 /// getLoad - Loads are not normal binary operators: their result type is not
253 /// determined by their operands, and they produce a value AND a token chain.
255 SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
257 SDOperand getVecLoad(unsigned Count, MVT::ValueType VT, SDOperand Chain,
258 SDOperand Ptr, SDOperand SV);
259 SDOperand getExtLoad(unsigned Opcode, MVT::ValueType VT, SDOperand Chain,
260 SDOperand Ptr, SDOperand SV, MVT::ValueType EVT);
262 // getSrcValue - construct a node to track a Value* through the backend
263 SDOperand getSrcValue(const Value* I, int offset = 0);
265 /// UpdateNodeOperands - *Mutate* the specified node in-place to have the
266 /// specified operands. If the resultant node already exists in the DAG,
267 /// this does not modify the specified node, instead it returns the node that
268 /// already exists. If the resultant node does not exist in the DAG, the
269 /// input node is returned. As a degenerate case, if you specify the same
270 /// input operands as the node already has, the input node is returned.
271 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op);
272 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2);
273 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
275 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
276 SDOperand Op3, SDOperand Op4);
277 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
278 SDOperand Op3, SDOperand Op4, SDOperand Op5);
279 SDOperand UpdateNodeOperands(SDOperand N, const std::vector<SDOperand> &Op);
281 /// SelectNodeTo - These are used for target selectors to *mutate* the
282 /// specified node to have the specified return type, Target opcode, and
283 /// operands. Note that target opcodes are stored as
284 /// ISD::BUILTIN_OP_END+TargetOpcode in the node opcode field. The 0th value
285 /// of the resultant node is returned.
286 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT);
287 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
289 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
290 SDOperand Op1, SDOperand Op2);
291 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
292 SDOperand Op1, SDOperand Op2, SDOperand Op3);
293 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
294 SDOperand Op1, SDOperand Op2, SDOperand Op3,
296 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
297 SDOperand Op1, SDOperand Op2, SDOperand Op3,
298 SDOperand Op4, SDOperand Op5);
299 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
300 SDOperand Op1, SDOperand Op2, SDOperand Op3,
301 SDOperand Op4, SDOperand Op5, SDOperand Op6);
302 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
303 SDOperand Op1, SDOperand Op2, SDOperand Op3,
304 SDOperand Op4, SDOperand Op5, SDOperand Op6,
306 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
307 SDOperand Op1, SDOperand Op2, SDOperand Op3,
308 SDOperand Op4, SDOperand Op5, SDOperand Op6,
309 SDOperand Op7, SDOperand Op8);
310 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
311 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2);
312 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
313 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
315 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
316 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
317 SDOperand Op3, SDOperand Op4);
318 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
319 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
320 SDOperand Op3, SDOperand Op4, SDOperand Op5);
322 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT) {
323 return getNode(ISD::BUILTIN_OP_END+Opcode, VT);
325 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
327 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1);
329 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
330 SDOperand Op1, SDOperand Op2) {
331 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2);
333 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
334 SDOperand Op1, SDOperand Op2, SDOperand Op3) {
335 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3);
337 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
338 SDOperand Op1, SDOperand Op2, SDOperand Op3,
340 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3, Op4);
342 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
343 SDOperand Op1, SDOperand Op2, SDOperand Op3,
344 SDOperand Op4, SDOperand Op5) {
345 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3, Op4, Op5);
347 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
348 SDOperand Op1, SDOperand Op2, SDOperand Op3,
349 SDOperand Op4, SDOperand Op5, SDOperand Op6) {
350 std::vector<SDOperand> Ops;
358 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
360 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
361 SDOperand Op1, SDOperand Op2, SDOperand Op3,
362 SDOperand Op4, SDOperand Op5, SDOperand Op6,
364 std::vector<SDOperand> Ops;
373 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
375 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
376 SDOperand Op1, SDOperand Op2, SDOperand Op3,
377 SDOperand Op4, SDOperand Op5, SDOperand Op6,
378 SDOperand Op7, SDOperand Op8) {
379 std::vector<SDOperand> Ops;
389 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
391 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
392 std::vector<SDOperand> &Ops) {
393 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
395 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
396 MVT::ValueType VT2, SDOperand Op1) {
397 std::vector<MVT::ValueType> ResultTys;
398 ResultTys.push_back(VT1);
399 ResultTys.push_back(VT2);
400 std::vector<SDOperand> Ops;
402 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
404 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
405 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2) {
406 std::vector<MVT::ValueType> ResultTys;
407 ResultTys.push_back(VT1);
408 ResultTys.push_back(VT2);
409 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,
417 std::vector<MVT::ValueType> ResultTys;
418 ResultTys.push_back(VT1);
419 ResultTys.push_back(VT2);
420 std::vector<SDOperand> Ops;
424 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
426 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
427 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
428 SDOperand Op3, SDOperand Op4) {
429 std::vector<MVT::ValueType> ResultTys;
430 ResultTys.push_back(VT1);
431 ResultTys.push_back(VT2);
432 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) {
442 std::vector<MVT::ValueType> ResultTys;
443 ResultTys.push_back(VT1);
444 ResultTys.push_back(VT2);
445 std::vector<SDOperand> Ops;
451 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
453 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
454 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
455 SDOperand Op3, SDOperand Op4, SDOperand Op5,
457 std::vector<MVT::ValueType> ResultTys;
458 ResultTys.push_back(VT1);
459 ResultTys.push_back(VT2);
460 std::vector<SDOperand> Ops;
467 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
469 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
470 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
471 SDOperand Op3, SDOperand Op4, SDOperand Op5,
472 SDOperand Op6, SDOperand Op7) {
473 std::vector<MVT::ValueType> ResultTys;
474 ResultTys.push_back(VT1);
475 ResultTys.push_back(VT2);
476 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 std::vector<MVT::ValueType> ResultTys;
490 ResultTys.push_back(VT1);
491 ResultTys.push_back(VT2);
492 ResultTys.push_back(VT3);
493 std::vector<SDOperand> Ops;
496 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
498 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
499 MVT::ValueType VT2, MVT::ValueType VT3,
500 SDOperand Op1, SDOperand Op2,
501 SDOperand Op3, SDOperand Op4, SDOperand Op5,
503 std::vector<MVT::ValueType> ResultTys;
504 ResultTys.push_back(VT1);
505 ResultTys.push_back(VT2);
506 ResultTys.push_back(VT3);
507 std::vector<SDOperand> Ops;
514 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
516 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
517 MVT::ValueType VT2, MVT::ValueType VT3,
518 SDOperand Op1, SDOperand Op2,
519 SDOperand Op3, SDOperand Op4, SDOperand Op5,
520 SDOperand Op6, SDOperand Op7) {
521 std::vector<MVT::ValueType> ResultTys;
522 ResultTys.push_back(VT1);
523 ResultTys.push_back(VT2);
524 ResultTys.push_back(VT3);
525 std::vector<SDOperand> Ops;
533 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
535 SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
536 MVT::ValueType VT2, std::vector<SDOperand> &Ops) {
537 std::vector<MVT::ValueType> ResultTys;
538 ResultTys.push_back(VT1);
539 ResultTys.push_back(VT2);
540 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
543 /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
544 /// This can cause recursive merging of nodes in the DAG. Use the first
545 /// version if 'From' is known to have a single result, use the second
546 /// if you have two nodes with identical results, use the third otherwise.
548 /// These methods all take an optional vector, which (if not null) is
549 /// populated with any nodes that are deleted from the SelectionDAG, due to
550 /// new equivalences that are discovered.
552 void ReplaceAllUsesWith(SDOperand From, SDOperand Op,
553 std::vector<SDNode*> *Deleted = 0);
554 void ReplaceAllUsesWith(SDNode *From, SDNode *To,
555 std::vector<SDNode*> *Deleted = 0);
556 void ReplaceAllUsesWith(SDNode *From, const std::vector<SDOperand> &To,
557 std::vector<SDNode*> *Deleted = 0);
560 /// DeleteNode - Remove the specified node from the system. This node must
561 /// have no referrers.
562 void DeleteNode(SDNode *N);
567 void RemoveNodeFromCSEMaps(SDNode *N);
568 SDNode *AddNonLeafNodeToCSEMaps(SDNode *N);
569 SDNode **FindModifiedNodeSlot(SDNode *N, SDOperand Op);
570 SDNode **FindModifiedNodeSlot(SDNode *N, SDOperand Op1, SDOperand Op2);
571 SDNode **FindModifiedNodeSlot(SDNode *N, const std::vector<SDOperand> &Ops);
573 void DestroyDeadNode(SDNode *N);
574 void DeleteNodeNotInCSEMaps(SDNode *N);
575 void setNodeValueTypes(SDNode *N, std::vector<MVT::ValueType> &RetVals);
576 void setNodeValueTypes(SDNode *N, MVT::ValueType VT1, MVT::ValueType VT2);
579 /// SimplifySetCC - Try to simplify a setcc built with the specified operands
580 /// and cc. If unable to simplify it, return a null SDOperand.
581 SDOperand SimplifySetCC(MVT::ValueType VT, SDOperand N1,
582 SDOperand N2, ISD::CondCode Cond);
584 // List of non-single value types.
585 std::list<std::vector<MVT::ValueType> > VTList;
587 // Maps to auto-CSE operations.
588 std::map<std::pair<unsigned, MVT::ValueType>, SDNode *> NullaryOps;
589 std::map<std::pair<unsigned, std::pair<SDOperand, MVT::ValueType> >,
591 std::map<std::pair<unsigned, std::pair<SDOperand, SDOperand> >,
594 std::map<std::pair<unsigned, MVT::ValueType>, RegisterSDNode*> RegNodes;
595 std::vector<CondCodeSDNode*> CondCodeNodes;
597 std::map<std::pair<SDOperand, std::pair<SDOperand, MVT::ValueType> >,
600 std::map<std::pair<const GlobalValue*, int>, SDNode*> GlobalValues;
601 std::map<std::pair<const GlobalValue*, int>, SDNode*> TargetGlobalValues;
602 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> Constants;
603 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstants;
604 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs;
605 std::map<int, SDNode*> FrameIndices, TargetFrameIndices;
606 std::map<Constant *, SDNode*> ConstantPoolIndices;
607 std::map<Constant *, SDNode*> TargetConstantPoolIndices;
608 std::map<MachineBasicBlock *, SDNode*> BBNodes;
609 std::vector<SDNode*> ValueTypeNodes;
610 std::map<std::string, SDNode*> ExternalSymbols;
611 std::map<std::string, SDNode*> TargetExternalSymbols;
612 std::map<std::string, StringSDNode*> StringNodes;
613 std::map<std::pair<unsigned,
614 std::pair<MVT::ValueType, std::vector<SDOperand> > >,
615 SDNode*> OneResultNodes;
616 std::map<std::pair<unsigned,
617 std::pair<std::vector<MVT::ValueType>,
618 std::vector<SDOperand> > >,
619 SDNode*> ArbitraryNodes;
622 template <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> {
623 typedef SelectionDAG::allnodes_iterator nodes_iterator;
624 static nodes_iterator nodes_begin(SelectionDAG *G) {
625 return G->allnodes_begin();
627 static nodes_iterator nodes_end(SelectionDAG *G) {
628 return G->allnodes_end();
632 } // end namespace llvm