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/CodeGen/SelectionDAGCSEMap.h"
20 #include "llvm/ADT/ilist"
30 class MachineDebugInfo;
31 class MachineFunction;
33 /// SelectionDAG class - This is used to represent a portion of an LLVM function
34 /// in a low-level Data Dependence DAG representation suitable for instruction
35 /// selection. This DAG is constructed as the first step of instruction
36 /// selection in order to allow implementation of machine specific optimizations
37 /// and code simplifications.
39 /// The representation used by the SelectionDAG is a target-independent
40 /// representation, which has some similarities to the GCC RTL representation,
41 /// but is significantly more simple, powerful, and is a graph form instead of a
49 // Root - The root of the entire DAG. EntryNode - The starting token.
50 SDOperand Root, EntryNode;
52 // AllNodes - A linked list of nodes in the current DAG.
53 ilist<SDNode> AllNodes;
55 // ValueNodes - track SrcValue nodes
56 std::map<std::pair<const Value*, int>, SDNode*> ValueNodes;
59 SelectionDAG(TargetLowering &tli, MachineFunction &mf, MachineDebugInfo *di)
60 : TLI(tli), MF(mf), DI(di) {
61 EntryNode = Root = getNode(ISD::EntryToken, MVT::Other);
65 MachineFunction &getMachineFunction() const { return MF; }
66 const TargetMachine &getTarget() const;
67 TargetLowering &getTargetLoweringInfo() const { return TLI; }
68 MachineDebugInfo *getMachineDebugInfo() const { return DI; }
70 /// viewGraph - Pop up a ghostview window with the DAG rendered using 'dot'.
75 typedef ilist<SDNode>::const_iterator allnodes_const_iterator;
76 allnodes_const_iterator allnodes_begin() const { return AllNodes.begin(); }
77 allnodes_const_iterator allnodes_end() const { return AllNodes.end(); }
78 typedef ilist<SDNode>::iterator allnodes_iterator;
79 allnodes_iterator allnodes_begin() { return AllNodes.begin(); }
80 allnodes_iterator allnodes_end() { return AllNodes.end(); }
82 /// getRoot - Return the root tag of the SelectionDAG.
84 const SDOperand &getRoot() const { return Root; }
86 /// getEntryNode - Return the token chain corresponding to the entry of the
88 const SDOperand &getEntryNode() const { return EntryNode; }
90 /// setRoot - Set the current root tag of the SelectionDAG.
92 const SDOperand &setRoot(SDOperand N) { return Root = N; }
94 /// Combine - This iterates over the nodes in the SelectionDAG, folding
95 /// certain types of nodes together, or eliminating superfluous nodes. When
96 /// the AfterLegalize argument is set to 'true', Combine takes care not to
97 /// generate any nodes that will be illegal on the target.
98 void Combine(bool AfterLegalize);
100 /// Legalize - This transforms the SelectionDAG into a SelectionDAG that is
101 /// compatible with the target instruction selector, as indicated by the
102 /// TargetLowering object.
104 /// Note that this is an involved process that may invalidate pointers into
108 /// RemoveDeadNodes - This method deletes all unreachable nodes in the
110 void RemoveDeadNodes();
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 getJumpTable(int JTI, MVT::ValueType VT);
124 SDOperand getTargetJumpTable(int JTI, MVT::ValueType VT);
125 SDOperand getConstantPool(Constant *C, MVT::ValueType VT,
126 unsigned Alignment=0, int offset = 0);
127 SDOperand getTargetConstantPool(Constant *C, MVT::ValueType VT,
128 unsigned Alignment=0, int offset = 0);
129 SDOperand getBasicBlock(MachineBasicBlock *MBB);
130 SDOperand getExternalSymbol(const char *Sym, MVT::ValueType VT);
131 SDOperand getTargetExternalSymbol(const char *Sym, MVT::ValueType VT);
132 SDOperand getValueType(MVT::ValueType);
133 SDOperand getRegister(unsigned Reg, MVT::ValueType VT);
135 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N) {
136 return getNode(ISD::CopyToReg, MVT::Other, Chain,
137 getRegister(Reg, N.getValueType()), N);
140 // This version of the getCopyToReg method takes an extra operand, which
141 // indicates that there is potentially an incoming flag value (if Flag is not
142 // null) and that there should be a flag result.
143 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N,
145 std::vector<MVT::ValueType> VTs;
146 VTs.push_back(MVT::Other);
147 VTs.push_back(MVT::Flag);
148 std::vector<SDOperand> Ops;
149 Ops.push_back(Chain);
150 Ops.push_back(getRegister(Reg, N.getValueType()));
152 if (Flag.Val) Ops.push_back(Flag);
153 return getNode(ISD::CopyToReg, VTs, Ops);
156 // Similar to last getCopyToReg() except parameter Reg is a SDOperand
157 SDOperand getCopyToReg(SDOperand Chain, SDOperand Reg, SDOperand N,
159 std::vector<MVT::ValueType> VTs;
160 VTs.push_back(MVT::Other);
161 VTs.push_back(MVT::Flag);
162 std::vector<SDOperand> Ops;
163 Ops.push_back(Chain);
166 if (Flag.Val) Ops.push_back(Flag);
167 return getNode(ISD::CopyToReg, VTs, Ops);
170 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT) {
171 std::vector<MVT::ValueType> ResultTys;
172 ResultTys.push_back(VT);
173 ResultTys.push_back(MVT::Other);
174 SDOperand Ops[] = { Chain, getRegister(Reg, VT) };
175 return getNode(ISD::CopyFromReg, ResultTys, Ops, 2);
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 SDOperand Ops[] = { Chain, getRegister(Reg, VT), Flag };
188 return getNode(ISD::CopyFromReg, ResultTys, Ops, Flag.Val ? 3 : 2);
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 /// getCALLSEQ_START - Return a new CALLSEQ_START node, which always must have
198 /// a flag result (to ensure it's not CSE'd).
199 SDOperand getCALLSEQ_START(SDOperand Chain, SDOperand Op) {
200 std::vector<MVT::ValueType> ResultTys;
201 ResultTys.push_back(MVT::Other);
202 ResultTys.push_back(MVT::Flag);
203 SDOperand Ops[] = { Chain, Op };
204 return getNode(ISD::CALLSEQ_START, ResultTys, Ops, 2);
207 /// getNode - Gets or creates the specified node.
209 SDOperand getNode(unsigned Opcode, MVT::ValueType VT);
210 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N);
211 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
212 SDOperand N1, SDOperand N2);
213 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
214 SDOperand N1, SDOperand N2, SDOperand N3);
215 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
216 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4);
217 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
218 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4,
220 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
221 std::vector<SDOperand> &Children);
222 SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys,
223 std::vector<SDOperand> &Ops);
225 SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
226 const SDOperand *Ops, unsigned NumOps);
227 SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys,
228 const SDOperand *Ops, unsigned NumOps);
231 /// getSetCC - Helper function to make it easier to build SetCC's if you just
232 /// have an ISD::CondCode instead of an SDOperand.
234 SDOperand getSetCC(MVT::ValueType VT, SDOperand LHS, SDOperand RHS,
235 ISD::CondCode Cond) {
236 return getNode(ISD::SETCC, VT, LHS, RHS, getCondCode(Cond));
239 /// getSelectCC - Helper function to make it easier to build SelectCC's if you
240 /// just have an ISD::CondCode instead of an SDOperand.
242 SDOperand getSelectCC(SDOperand LHS, SDOperand RHS,
243 SDOperand True, SDOperand False, ISD::CondCode Cond) {
244 MVT::ValueType VT = True.getValueType();
245 return getNode(ISD::SELECT_CC, VT, LHS, RHS, True, False,getCondCode(Cond));
248 /// getVAArg - VAArg produces a result and token chain, and takes a pointer
249 /// and a source value as input.
250 SDOperand getVAArg(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
253 /// getLoad - Loads are not normal binary operators: their result type is not
254 /// determined by their operands, and they produce a value AND a token chain.
256 SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
258 SDOperand getVecLoad(unsigned Count, MVT::ValueType VT, SDOperand Chain,
259 SDOperand Ptr, SDOperand SV);
260 SDOperand getExtLoad(unsigned Opcode, MVT::ValueType VT, SDOperand Chain,
261 SDOperand Ptr, SDOperand SV, MVT::ValueType EVT);
263 // getSrcValue - construct a node to track a Value* through the backend
264 SDOperand getSrcValue(const Value* I, int offset = 0);
266 /// UpdateNodeOperands - *Mutate* the specified node in-place to have the
267 /// specified operands. If the resultant node already exists in the DAG,
268 /// this does not modify the specified node, instead it returns the node that
269 /// already exists. If the resultant node does not exist in the DAG, the
270 /// input node is returned. As a degenerate case, if you specify the same
271 /// input operands as the node already has, the input node is returned.
272 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op);
273 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2);
274 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
276 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
277 SDOperand Op3, SDOperand Op4);
278 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2,
279 SDOperand Op3, SDOperand Op4, SDOperand Op5);
280 SDOperand UpdateNodeOperands(SDOperand N, SDOperand *Ops, unsigned NumOps);
282 /// SelectNodeTo - These are used for target selectors to *mutate* the
283 /// specified node to have the specified return type, Target opcode, and
284 /// operands. Note that target opcodes are stored as
285 /// ISD::BUILTIN_OP_END+TargetOpcode in the node opcode field. The 0th value
286 /// of the resultant node is returned.
287 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT);
288 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
290 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
291 SDOperand Op1, SDOperand Op2);
292 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
293 SDOperand Op1, SDOperand Op2, SDOperand Op3);
294 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
295 SDOperand Op1, SDOperand Op2, SDOperand Op3,
297 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
298 SDOperand Op1, SDOperand Op2, SDOperand Op3,
299 SDOperand Op4, SDOperand Op5);
300 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
301 SDOperand Op1, SDOperand Op2, SDOperand Op3,
302 SDOperand Op4, SDOperand Op5, SDOperand Op6);
303 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
304 SDOperand Op1, SDOperand Op2, SDOperand Op3,
305 SDOperand Op4, SDOperand Op5, SDOperand Op6,
307 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
308 SDOperand Op1, SDOperand Op2, SDOperand Op3,
309 SDOperand Op4, SDOperand Op5, SDOperand Op6,
310 SDOperand Op7, SDOperand Op8);
311 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
312 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2);
313 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
314 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
316 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
317 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
318 SDOperand Op3, SDOperand Op4);
319 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
320 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
321 SDOperand Op3, SDOperand Op4, SDOperand Op5);
323 /// getTargetNode - These are used for target selectors to create a new node
324 /// with specified return type(s), target opcode, and operands.
326 /// Note that getTargetNode returns the resultant node. If there is already a
327 /// node of the specified opcode and operands, it returns that node instead of
329 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT);
330 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
332 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
333 SDOperand Op1, SDOperand Op2);
334 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
335 SDOperand Op1, SDOperand Op2, SDOperand Op3);
336 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
337 SDOperand Op1, SDOperand Op2, SDOperand Op3,
339 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
340 SDOperand Op1, SDOperand Op2, SDOperand Op3,
341 SDOperand Op4, SDOperand Op5);
342 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
343 SDOperand Op1, SDOperand Op2, SDOperand Op3,
344 SDOperand Op4, SDOperand Op5, SDOperand Op6);
345 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
346 SDOperand Op1, SDOperand Op2, SDOperand Op3,
347 SDOperand Op4, SDOperand Op5, SDOperand Op6,
349 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
350 SDOperand Op1, SDOperand Op2, SDOperand Op3,
351 SDOperand Op4, SDOperand Op5, SDOperand Op6,
352 SDOperand Op7, SDOperand Op8);
353 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT,
354 std::vector<SDOperand> &Ops);
355 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
356 MVT::ValueType VT2, SDOperand Op1);
357 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
358 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2);
359 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
360 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
362 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
363 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
364 SDOperand Op3, SDOperand Op4);
365 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
366 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
367 SDOperand Op3, SDOperand Op4, SDOperand Op5);
368 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
369 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
370 SDOperand Op3, SDOperand Op4, SDOperand Op5,
372 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
373 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
374 SDOperand Op3, SDOperand Op4, SDOperand Op5,
375 SDOperand Op6, SDOperand Op7);
376 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
377 MVT::ValueType VT2, MVT::ValueType VT3,
378 SDOperand Op1, SDOperand Op2);
379 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
380 MVT::ValueType VT2, MVT::ValueType VT3,
381 SDOperand Op1, SDOperand Op2,
382 SDOperand Op3, SDOperand Op4, SDOperand Op5);
383 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
384 MVT::ValueType VT2, MVT::ValueType VT3,
385 SDOperand Op1, SDOperand Op2,
386 SDOperand Op3, SDOperand Op4, SDOperand Op5,
388 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
389 MVT::ValueType VT2, MVT::ValueType VT3,
390 SDOperand Op1, SDOperand Op2,
391 SDOperand Op3, SDOperand Op4, SDOperand Op5,
392 SDOperand Op6, SDOperand Op7);
393 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1,
394 MVT::ValueType VT2, std::vector<SDOperand> &Ops);
396 /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
397 /// This can cause recursive merging of nodes in the DAG. Use the first
398 /// version if 'From' is known to have a single result, use the second
399 /// if you have two nodes with identical results, use the third otherwise.
401 /// These methods all take an optional vector, which (if not null) is
402 /// populated with any nodes that are deleted from the SelectionDAG, due to
403 /// new equivalences that are discovered.
405 void ReplaceAllUsesWith(SDOperand From, SDOperand Op,
406 std::vector<SDNode*> *Deleted = 0);
407 void ReplaceAllUsesWith(SDNode *From, SDNode *To,
408 std::vector<SDNode*> *Deleted = 0);
409 void ReplaceAllUsesWith(SDNode *From, const std::vector<SDOperand> &To,
410 std::vector<SDNode*> *Deleted = 0);
412 /// ReplaceAllUsesOfValueWith - Replace any uses of From with To, leaving
413 /// uses of other values produced by From.Val alone. The Deleted vector is
414 /// handled the same was as for ReplaceAllUsesWith, but it is required for
416 void ReplaceAllUsesOfValueWith(SDOperand From, SDOperand To,
417 std::vector<SDNode*> &Deleted);
419 /// DeleteNode - Remove the specified node from the system. This node must
420 /// have no referrers.
421 void DeleteNode(SDNode *N);
423 /// AssignNodeIds - Assign a unique node id for each node in the DAG based on
424 /// their allnodes order. It returns the maximum id.
425 unsigned AssignNodeIds();
427 /// AssignTopologicalOrder - Assign a unique node id for each node in the DAG
428 /// based on their topological order. It returns the maximum id and a vector
429 /// of the SDNodes* in assigned order by reference.
430 unsigned AssignTopologicalOrder(std::vector<SDNode*> &TopOrder);
434 /// InsertISelMapEntry - A helper function to insert a key / element pair
435 /// into a SDOperand to SDOperand map. This is added to avoid the map
436 /// insertion operator from being inlined.
437 static void InsertISelMapEntry(std::map<SDOperand, SDOperand> &Map,
438 SDNode *Key, unsigned KeyResNo,
439 SDNode *Element, unsigned ElementResNo);
442 void RemoveNodeFromCSEMaps(SDNode *N);
443 SDNode *AddNonLeafNodeToCSEMaps(SDNode *N);
444 SDNode *FindModifiedNodeSlot(SDNode *N, SDOperand Op, void *&InsertPos);
445 SDNode *FindModifiedNodeSlot(SDNode *N, SDOperand Op1, SDOperand Op2,
447 SDNode *FindModifiedNodeSlot(SDNode *N, const SDOperand *Ops, unsigned NumOps,
450 void DeleteNodeNotInCSEMaps(SDNode *N);
451 MVT::ValueType *getNodeValueTypes(MVT::ValueType VT1);
452 MVT::ValueType *getNodeValueTypes(MVT::ValueType VT1, MVT::ValueType VT2);
453 MVT::ValueType *getNodeValueTypes(std::vector<MVT::ValueType> &RetVals);
456 /// SimplifySetCC - Try to simplify a setcc built with the specified operands
457 /// and cc. If unable to simplify it, return a null SDOperand.
458 SDOperand SimplifySetCC(MVT::ValueType VT, SDOperand N1,
459 SDOperand N2, ISD::CondCode Cond);
461 // List of non-single value types.
462 std::list<std::vector<MVT::ValueType> > VTList;
464 // Maps to auto-CSE operations.
465 std::map<std::pair<unsigned, MVT::ValueType>, SDNode *> NullaryOps;
467 std::map<std::pair<unsigned, MVT::ValueType>, RegisterSDNode*> RegNodes;
468 std::vector<CondCodeSDNode*> CondCodeNodes;
470 std::map<std::pair<const GlobalValue*, int>, SDNode*> GlobalValues;
471 std::map<std::pair<const GlobalValue*, int>, SDNode*> TargetGlobalValues;
472 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> Constants;
473 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstants;
474 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs;
475 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstantFPs;
476 std::map<int, SDNode*> FrameIndices, TargetFrameIndices, JumpTableIndices,
477 TargetJumpTableIndices;
478 std::map<std::pair<Constant *,
479 std::pair<int, unsigned> >, SDNode*> ConstantPoolIndices;
480 std::map<std::pair<Constant *,
481 std::pair<int, unsigned> >, SDNode*> TargetConstantPoolIndices;
482 std::map<MachineBasicBlock *, SDNode*> BBNodes;
483 std::vector<SDNode*> ValueTypeNodes;
484 std::map<std::string, SDNode*> ExternalSymbols;
485 std::map<std::string, SDNode*> TargetExternalSymbols;
486 std::map<std::string, StringSDNode*> StringNodes;
487 SelectionDAGCSEMap CSEMap;
490 template <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> {
491 typedef SelectionDAG::allnodes_iterator nodes_iterator;
492 static nodes_iterator nodes_begin(SelectionDAG *G) {
493 return G->allnodes_begin();
495 static nodes_iterator nodes_end(SelectionDAG *G) {
496 return G->allnodes_end();
500 } // end namespace llvm