SelectionDAG.h revision 190a418bf6b49a4ef1c1980229a2f0d516e8a2cd
1//===-- llvm/CodeGen/SelectionDAG.h - InstSelection DAG ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 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. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file declares the SelectionDAG class, and transitively defines the 11// SDNode class and subclasses. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CODEGEN_SELECTIONDAG_H 16#define LLVM_CODEGEN_SELECTIONDAG_H 17 18#include "llvm/CodeGen/SelectionDAGNodes.h" 19#include "llvm/ADT/ilist" 20 21#include <list> 22#include <map> 23#include <set> 24#include <string> 25 26namespace llvm { 27 class TargetLowering; 28 class TargetMachine; 29 class MachineDebugInfo; 30 class MachineFunction; 31 32/// SelectionDAG class - This is used to represent a portion of an LLVM function 33/// in a low-level Data Dependence DAG representation suitable for instruction 34/// selection. This DAG is constructed as the first step of instruction 35/// selection in order to allow implementation of machine specific optimizations 36/// and code simplifications. 37/// 38/// The representation used by the SelectionDAG is a target-independent 39/// representation, which has some similarities to the GCC RTL representation, 40/// but is significantly more simple, powerful, and is a graph form instead of a 41/// linear form. 42/// 43class SelectionDAG { 44 TargetLowering &TLI; 45 MachineFunction &MF; 46 MachineDebugInfo *DI; 47 48 // Root - The root of the entire DAG. EntryNode - The starting token. 49 SDOperand Root, EntryNode; 50 51 // AllNodes - A linked list of nodes in the current DAG. 52 ilist<SDNode> AllNodes; 53 54 // ValueNodes - track SrcValue nodes 55 std::map<std::pair<const Value*, int>, SDNode*> ValueNodes; 56 57public: 58 SelectionDAG(TargetLowering &tli, MachineFunction &mf, MachineDebugInfo *di) 59 : TLI(tli), MF(mf), DI(di) { 60 EntryNode = Root = getNode(ISD::EntryToken, MVT::Other); 61 } 62 ~SelectionDAG(); 63 64 MachineFunction &getMachineFunction() const { return MF; } 65 const TargetMachine &getTarget() const; 66 TargetLowering &getTargetLoweringInfo() const { return TLI; } 67 MachineDebugInfo *getMachineDebugInfo() const { return DI; } 68 69 /// viewGraph - Pop up a ghostview window with the DAG rendered using 'dot'. 70 /// 71 void viewGraph(); 72 73 74 typedef ilist<SDNode>::const_iterator allnodes_const_iterator; 75 allnodes_const_iterator allnodes_begin() const { return AllNodes.begin(); } 76 allnodes_const_iterator allnodes_end() const { return AllNodes.end(); } 77 typedef ilist<SDNode>::iterator allnodes_iterator; 78 allnodes_iterator allnodes_begin() { return AllNodes.begin(); } 79 allnodes_iterator allnodes_end() { return AllNodes.end(); } 80 81 /// getRoot - Return the root tag of the SelectionDAG. 82 /// 83 const SDOperand &getRoot() const { return Root; } 84 85 /// getEntryNode - Return the token chain corresponding to the entry of the 86 /// function. 87 const SDOperand &getEntryNode() const { return EntryNode; } 88 89 /// setRoot - Set the current root tag of the SelectionDAG. 90 /// 91 const SDOperand &setRoot(SDOperand N) { return Root = N; } 92 93 /// Combine - This iterates over the nodes in the SelectionDAG, folding 94 /// certain types of nodes together, or eliminating superfluous nodes. When 95 /// the AfterLegalize argument is set to 'true', Combine takes care not to 96 /// generate any nodes that will be illegal on the target. 97 void Combine(bool AfterLegalize); 98 99 /// Legalize - This transforms the SelectionDAG into a SelectionDAG that is 100 /// compatible with the target instruction selector, as indicated by the 101 /// TargetLowering object. 102 /// 103 /// Note that this is an involved process that may invalidate pointers into 104 /// the graph. 105 void Legalize(); 106 107 /// RemoveDeadNodes - This method deletes all unreachable nodes in the 108 /// SelectionDAG. 109 void RemoveDeadNodes(); 110 111 SDOperand getString(const std::string &Val); 112 SDOperand getConstant(uint64_t Val, MVT::ValueType VT); 113 SDOperand getTargetConstant(uint64_t Val, MVT::ValueType VT); 114 SDOperand getConstantFP(double Val, MVT::ValueType VT); 115 SDOperand getTargetConstantFP(double Val, MVT::ValueType VT); 116 SDOperand getGlobalAddress(const GlobalValue *GV, MVT::ValueType VT, 117 int offset = 0); 118 SDOperand getTargetGlobalAddress(const GlobalValue *GV, MVT::ValueType VT, 119 int offset = 0); 120 SDOperand getFrameIndex(int FI, MVT::ValueType VT); 121 SDOperand getTargetFrameIndex(int FI, MVT::ValueType VT); 122 SDOperand getJumpTable(int JTI, MVT::ValueType VT); 123 SDOperand getTargetJumpTable(int JTI, MVT::ValueType VT); 124 SDOperand getConstantPool(Constant *C, MVT::ValueType VT, 125 unsigned Alignment=0, int offset = 0); 126 SDOperand getTargetConstantPool(Constant *C, MVT::ValueType VT, 127 unsigned Alignment=0, int offset = 0); 128 SDOperand getBasicBlock(MachineBasicBlock *MBB); 129 SDOperand getExternalSymbol(const char *Sym, MVT::ValueType VT); 130 SDOperand getTargetExternalSymbol(const char *Sym, MVT::ValueType VT); 131 SDOperand getValueType(MVT::ValueType); 132 SDOperand getRegister(unsigned Reg, MVT::ValueType VT); 133 134 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N) { 135 return getNode(ISD::CopyToReg, MVT::Other, Chain, 136 getRegister(Reg, N.getValueType()), N); 137 } 138 139 // This version of the getCopyToReg method takes an extra operand, which 140 // indicates that there is potentially an incoming flag value (if Flag is not 141 // null) and that there should be a flag result. 142 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N, 143 SDOperand Flag) { 144 std::vector<MVT::ValueType> VTs; 145 VTs.push_back(MVT::Other); 146 VTs.push_back(MVT::Flag); 147 std::vector<SDOperand> Ops; 148 Ops.push_back(Chain); 149 Ops.push_back(getRegister(Reg, N.getValueType())); 150 Ops.push_back(N); 151 if (Flag.Val) Ops.push_back(Flag); 152 return getNode(ISD::CopyToReg, VTs, Ops); 153 } 154 155 // Similar to last getCopyToReg() except parameter Reg is a SDOperand 156 SDOperand getCopyToReg(SDOperand Chain, SDOperand Reg, SDOperand N, 157 SDOperand Flag) { 158 std::vector<MVT::ValueType> VTs; 159 VTs.push_back(MVT::Other); 160 VTs.push_back(MVT::Flag); 161 std::vector<SDOperand> Ops; 162 Ops.push_back(Chain); 163 Ops.push_back(Reg); 164 Ops.push_back(N); 165 if (Flag.Val) Ops.push_back(Flag); 166 return getNode(ISD::CopyToReg, VTs, Ops); 167 } 168 169 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT) { 170 std::vector<MVT::ValueType> ResultTys; 171 ResultTys.push_back(VT); 172 ResultTys.push_back(MVT::Other); 173 std::vector<SDOperand> Ops; 174 Ops.push_back(Chain); 175 Ops.push_back(getRegister(Reg, VT)); 176 return getNode(ISD::CopyFromReg, ResultTys, Ops); 177 } 178 179 // This version of the getCopyFromReg method takes an extra operand, which 180 // indicates that there is potentially an incoming flag value (if Flag is not 181 // null) and that there should be a flag result. 182 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT, 183 SDOperand Flag) { 184 std::vector<MVT::ValueType> ResultTys; 185 ResultTys.push_back(VT); 186 ResultTys.push_back(MVT::Other); 187 ResultTys.push_back(MVT::Flag); 188 std::vector<SDOperand> Ops; 189 Ops.push_back(Chain); 190 Ops.push_back(getRegister(Reg, VT)); 191 if (Flag.Val) Ops.push_back(Flag); 192 return getNode(ISD::CopyFromReg, ResultTys, Ops); 193 } 194 195 SDOperand getCondCode(ISD::CondCode Cond); 196 197 /// getZeroExtendInReg - Return the expression required to zero extend the Op 198 /// value assuming it was the smaller SrcTy value. 199 SDOperand getZeroExtendInReg(SDOperand Op, MVT::ValueType SrcTy); 200 201 /// getCALLSEQ_START - Return a new CALLSEQ_START node, which always must have 202 /// a flag result (to ensure it's not CSE'd). 203 SDOperand getCALLSEQ_START(SDOperand Chain, SDOperand Op) { 204 std::vector<MVT::ValueType> ResultTys; 205 ResultTys.push_back(MVT::Other); 206 ResultTys.push_back(MVT::Flag); 207 std::vector<SDOperand> Ops; 208 Ops.push_back(Chain); 209 Ops.push_back(Op); 210 return getNode(ISD::CALLSEQ_START, ResultTys, Ops); 211 } 212 213 /// getNode - Gets or creates the specified node. 214 /// 215 SDOperand getNode(unsigned Opcode, MVT::ValueType VT); 216 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N); 217 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 218 SDOperand N1, SDOperand N2); 219 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 220 SDOperand N1, SDOperand N2, SDOperand N3); 221 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 222 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4); 223 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 224 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4, 225 SDOperand N5); 226 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 227 std::vector<SDOperand> &Children); 228 SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys, 229 std::vector<SDOperand> &Ops); 230 231 /// getSetCC - Helper function to make it easier to build SetCC's if you just 232 /// have an ISD::CondCode instead of an SDOperand. 233 /// 234 SDOperand getSetCC(MVT::ValueType VT, SDOperand LHS, SDOperand RHS, 235 ISD::CondCode Cond) { 236 return getNode(ISD::SETCC, VT, LHS, RHS, getCondCode(Cond)); 237 } 238 239 /// getSelectCC - Helper function to make it easier to build SelectCC's if you 240 /// just have an ISD::CondCode instead of an SDOperand. 241 /// 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)); 246 } 247 248 /// 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, 251 SDOperand SV); 252 253 /// 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. 255 /// 256 SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr, 257 SDOperand SV); 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); 262 263 // getSrcValue - construct a node to track a Value* through the backend 264 SDOperand getSrcValue(const Value* I, int offset = 0); 265 266 /// 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, 275 SDOperand Op3); 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, const std::vector<SDOperand> &Op); 281 282 /// 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, 289 SDOperand Op1); 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, 296 SDOperand Op4); 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, 306 SDOperand Op7); 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, 315 SDOperand Op3); 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); 322 323 /// getTargetNode - These are used for target selectors to create a new node 324 /// with specified return type(s), target opcode, and operands. 325 /// 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 328 /// the current one. 329 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT); 330 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT, 331 SDOperand Op1); 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, 338 SDOperand Op4); 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, 348 SDOperand Op7); 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, 361 SDOperand Op3); 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, 371 SDOperand Op6); 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, 387 SDOperand Op6); 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); 395 396 /// 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. 400 /// 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. 404 /// 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); 411 412 /// 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 415 /// this method. 416 void ReplaceAllUsesOfValueWith(SDOperand From, SDOperand To, 417 std::vector<SDNode*> &Deleted); 418 419 /// DeleteNode - Remove the specified node from the system. This node must 420 /// have no referrers. 421 void DeleteNode(SDNode *N); 422 423 /// 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(); 426 427 /// 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); 431 432 void dump() const; 433 434 /// 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); 440 441private: 442 void RemoveNodeFromCSEMaps(SDNode *N); 443 SDNode *AddNonLeafNodeToCSEMaps(SDNode *N); 444 SDNode **FindModifiedNodeSlot(SDNode *N, SDOperand Op); 445 SDNode **FindModifiedNodeSlot(SDNode *N, SDOperand Op1, SDOperand Op2); 446 SDNode **FindModifiedNodeSlot(SDNode *N, const std::vector<SDOperand> &Ops); 447 448 void DeleteNodeNotInCSEMaps(SDNode *N); 449 void setNodeValueTypes(SDNode *N, std::vector<MVT::ValueType> &RetVals); 450 void setNodeValueTypes(SDNode *N, MVT::ValueType VT1, MVT::ValueType VT2); 451 452 453 /// SimplifySetCC - Try to simplify a setcc built with the specified operands 454 /// and cc. If unable to simplify it, return a null SDOperand. 455 SDOperand SimplifySetCC(MVT::ValueType VT, SDOperand N1, 456 SDOperand N2, ISD::CondCode Cond); 457 458 // List of non-single value types. 459 std::list<std::vector<MVT::ValueType> > VTList; 460 461 // Maps to auto-CSE operations. 462 std::map<std::pair<unsigned, MVT::ValueType>, SDNode *> NullaryOps; 463 std::map<std::pair<unsigned, std::pair<SDOperand, MVT::ValueType> >, 464 SDNode *> UnaryOps; 465 std::map<std::pair<unsigned, std::pair<SDOperand, SDOperand> >, 466 SDNode *> BinaryOps; 467 468 std::map<std::pair<unsigned, MVT::ValueType>, RegisterSDNode*> RegNodes; 469 std::vector<CondCodeSDNode*> CondCodeNodes; 470 471 std::map<std::pair<SDOperand, std::pair<SDOperand, MVT::ValueType> >, 472 SDNode *> Loads; 473 474 std::map<std::pair<const GlobalValue*, int>, SDNode*> GlobalValues; 475 std::map<std::pair<const GlobalValue*, int>, SDNode*> TargetGlobalValues; 476 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> Constants; 477 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstants; 478 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs; 479 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstantFPs; 480 std::map<int, SDNode*> FrameIndices, TargetFrameIndices, JumpTableIndices, 481 TargetJumpTableIndices; 482 std::map<std::pair<Constant *, 483 std::pair<int, unsigned> >, SDNode*> ConstantPoolIndices; 484 std::map<std::pair<Constant *, 485 std::pair<int, unsigned> >, SDNode*> TargetConstantPoolIndices; 486 std::map<MachineBasicBlock *, SDNode*> BBNodes; 487 std::vector<SDNode*> ValueTypeNodes; 488 std::map<std::string, SDNode*> ExternalSymbols; 489 std::map<std::string, SDNode*> TargetExternalSymbols; 490 std::map<std::string, StringSDNode*> StringNodes; 491 std::map<std::pair<unsigned, 492 std::pair<MVT::ValueType, std::vector<SDOperand> > >, 493 SDNode*> OneResultNodes; 494 std::map<std::pair<unsigned, 495 std::pair<std::vector<MVT::ValueType>, 496 std::vector<SDOperand> > >, 497 SDNode*> ArbitraryNodes; 498}; 499 500template <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> { 501 typedef SelectionDAG::allnodes_iterator nodes_iterator; 502 static nodes_iterator nodes_begin(SelectionDAG *G) { 503 return G->allnodes_begin(); 504 } 505 static nodes_iterator nodes_end(SelectionDAG *G) { 506 return G->allnodes_end(); 507 } 508}; 509 510} // end namespace llvm 511 512#endif 513