LLVM API Documentation
00001 //===-- llvm/CodeGen/SelectionDAG.h - InstSelection DAG ---------*- C++ -*-===// 00002 // 00003 // The LLVM Compiler Infrastructure 00004 // 00005 // This file was developed by the LLVM research group and is distributed under 00006 // the University of Illinois Open Source License. See LICENSE.TXT for details. 00007 // 00008 //===----------------------------------------------------------------------===// 00009 // 00010 // This file declares the SelectionDAG class, and transitively defines the 00011 // SDNode class and subclasses. 00012 // 00013 //===----------------------------------------------------------------------===// 00014 00015 #ifndef LLVM_CODEGEN_SELECTIONDAG_H 00016 #define LLVM_CODEGEN_SELECTIONDAG_H 00017 00018 #include "llvm/CodeGen/SelectionDAGNodes.h" 00019 #include "llvm/ADT/ilist" 00020 00021 #include <map> 00022 #include <list> 00023 #include <string> 00024 00025 namespace llvm { 00026 class TargetLowering; 00027 class TargetMachine; 00028 class MachineDebugInfo; 00029 class MachineFunction; 00030 00031 /// SelectionDAG class - This is used to represent a portion of an LLVM function 00032 /// in a low-level Data Dependence DAG representation suitable for instruction 00033 /// selection. This DAG is constructed as the first step of instruction 00034 /// selection in order to allow implementation of machine specific optimizations 00035 /// and code simplifications. 00036 /// 00037 /// The representation used by the SelectionDAG is a target-independent 00038 /// representation, which has some similarities to the GCC RTL representation, 00039 /// but is significantly more simple, powerful, and is a graph form instead of a 00040 /// linear form. 00041 /// 00042 class SelectionDAG { 00043 TargetLowering &TLI; 00044 MachineFunction &MF; 00045 MachineDebugInfo *DI; 00046 00047 // Root - The root of the entire DAG. EntryNode - The starting token. 00048 SDOperand Root, EntryNode; 00049 00050 // AllNodes - A linked list of nodes in the current DAG. 00051 ilist<SDNode> AllNodes; 00052 00053 // ValueNodes - track SrcValue nodes 00054 std::map<std::pair<const Value*, int>, SDNode*> ValueNodes; 00055 00056 public: 00057 SelectionDAG(TargetLowering &tli, MachineFunction &mf, MachineDebugInfo *di) 00058 : TLI(tli), MF(mf), DI(di) { 00059 EntryNode = Root = getNode(ISD::EntryToken, MVT::Other); 00060 } 00061 ~SelectionDAG(); 00062 00063 MachineFunction &getMachineFunction() const { return MF; } 00064 const TargetMachine &getTarget() const; 00065 TargetLowering &getTargetLoweringInfo() const { return TLI; } 00066 MachineDebugInfo *getMachineDebugInfo() const { return DI; } 00067 00068 /// viewGraph - Pop up a ghostview window with the DAG rendered using 'dot'. 00069 /// 00070 void viewGraph(); 00071 00072 00073 typedef ilist<SDNode>::const_iterator allnodes_const_iterator; 00074 allnodes_const_iterator allnodes_begin() const { return AllNodes.begin(); } 00075 allnodes_const_iterator allnodes_end() const { return AllNodes.end(); } 00076 typedef ilist<SDNode>::iterator allnodes_iterator; 00077 allnodes_iterator allnodes_begin() { return AllNodes.begin(); } 00078 allnodes_iterator allnodes_end() { return AllNodes.end(); } 00079 00080 /// getRoot - Return the root tag of the SelectionDAG. 00081 /// 00082 const SDOperand &getRoot() const { return Root; } 00083 00084 /// getEntryNode - Return the token chain corresponding to the entry of the 00085 /// function. 00086 const SDOperand &getEntryNode() const { return EntryNode; } 00087 00088 /// setRoot - Set the current root tag of the SelectionDAG. 00089 /// 00090 const SDOperand &setRoot(SDOperand N) { return Root = N; } 00091 00092 /// Combine - This iterates over the nodes in the SelectionDAG, folding 00093 /// certain types of nodes together, or eliminating superfluous nodes. When 00094 /// the AfterLegalize argument is set to 'true', Combine takes care not to 00095 /// generate any nodes that will be illegal on the target. 00096 void Combine(bool AfterLegalize); 00097 00098 /// Legalize - This transforms the SelectionDAG into a SelectionDAG that is 00099 /// compatible with the target instruction selector, as indicated by the 00100 /// TargetLowering object. 00101 /// 00102 /// Note that this is an involved process that may invalidate pointers into 00103 /// the graph. 00104 void Legalize(); 00105 00106 /// RemoveDeadNodes - This method deletes all unreachable nodes in the 00107 /// SelectionDAG, including nodes (like loads) that have uses of their token 00108 /// chain but no other uses and no side effect. If a node is passed in as an 00109 /// argument, it is used as the seed for node deletion. 00110 void RemoveDeadNodes(SDNode *N = 0); 00111 00112 SDOperand getString(const std::string &Val); 00113 SDOperand getConstant(uint64_t Val, MVT::ValueType VT); 00114 SDOperand getTargetConstant(uint64_t Val, MVT::ValueType VT); 00115 SDOperand getConstantFP(double Val, MVT::ValueType VT); 00116 SDOperand getTargetConstantFP(double Val, MVT::ValueType VT); 00117 SDOperand getGlobalAddress(const GlobalValue *GV, MVT::ValueType VT, 00118 int offset = 0); 00119 SDOperand getTargetGlobalAddress(const GlobalValue *GV, MVT::ValueType VT, 00120 int offset = 0); 00121 SDOperand getFrameIndex(int FI, MVT::ValueType VT); 00122 SDOperand getTargetFrameIndex(int FI, MVT::ValueType VT); 00123 SDOperand getConstantPool(Constant *C, MVT::ValueType VT, 00124 unsigned Alignment=0, int offset = 0); 00125 SDOperand getTargetConstantPool(Constant *C, MVT::ValueType VT, 00126 unsigned Alignment=0, int offset = 0); 00127 SDOperand getBasicBlock(MachineBasicBlock *MBB); 00128 SDOperand getExternalSymbol(const char *Sym, MVT::ValueType VT); 00129 SDOperand getTargetExternalSymbol(const char *Sym, MVT::ValueType VT); 00130 SDOperand getValueType(MVT::ValueType); 00131 SDOperand getRegister(unsigned Reg, MVT::ValueType VT); 00132 00133 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N) { 00134 return getNode(ISD::CopyToReg, MVT::Other, Chain, 00135 getRegister(Reg, N.getValueType()), N); 00136 } 00137 00138 // This version of the getCopyToReg method takes an extra operand, which 00139 // indicates that there is potentially an incoming flag value (if Flag is not 00140 // null) and that there should be a flag result. 00141 SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N, 00142 SDOperand Flag) { 00143 std::vector<MVT::ValueType> VTs; 00144 VTs.push_back(MVT::Other); 00145 VTs.push_back(MVT::Flag); 00146 std::vector<SDOperand> Ops; 00147 Ops.push_back(Chain); 00148 Ops.push_back(getRegister(Reg, N.getValueType())); 00149 Ops.push_back(N); 00150 if (Flag.Val) Ops.push_back(Flag); 00151 return getNode(ISD::CopyToReg, VTs, Ops); 00152 } 00153 00154 // Similar to last getCopyToReg() except parameter Reg is a SDOperand 00155 SDOperand getCopyToReg(SDOperand Chain, SDOperand Reg, SDOperand N, 00156 SDOperand Flag) { 00157 std::vector<MVT::ValueType> VTs; 00158 VTs.push_back(MVT::Other); 00159 VTs.push_back(MVT::Flag); 00160 std::vector<SDOperand> Ops; 00161 Ops.push_back(Chain); 00162 Ops.push_back(Reg); 00163 Ops.push_back(N); 00164 if (Flag.Val) Ops.push_back(Flag); 00165 return getNode(ISD::CopyToReg, VTs, Ops); 00166 } 00167 00168 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT) { 00169 std::vector<MVT::ValueType> ResultTys; 00170 ResultTys.push_back(VT); 00171 ResultTys.push_back(MVT::Other); 00172 std::vector<SDOperand> Ops; 00173 Ops.push_back(Chain); 00174 Ops.push_back(getRegister(Reg, VT)); 00175 return getNode(ISD::CopyFromReg, ResultTys, Ops); 00176 } 00177 00178 // This version of the getCopyFromReg method takes an extra operand, which 00179 // indicates that there is potentially an incoming flag value (if Flag is not 00180 // null) and that there should be a flag result. 00181 SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT, 00182 SDOperand Flag) { 00183 std::vector<MVT::ValueType> ResultTys; 00184 ResultTys.push_back(VT); 00185 ResultTys.push_back(MVT::Other); 00186 ResultTys.push_back(MVT::Flag); 00187 std::vector<SDOperand> Ops; 00188 Ops.push_back(Chain); 00189 Ops.push_back(getRegister(Reg, VT)); 00190 if (Flag.Val) Ops.push_back(Flag); 00191 return getNode(ISD::CopyFromReg, ResultTys, Ops); 00192 } 00193 00194 SDOperand getCondCode(ISD::CondCode Cond); 00195 00196 /// getZeroExtendInReg - Return the expression required to zero extend the Op 00197 /// value assuming it was the smaller SrcTy value. 00198 SDOperand getZeroExtendInReg(SDOperand Op, MVT::ValueType SrcTy); 00199 00200 /// getCALLSEQ_START - Return a new CALLSEQ_START node, which always must have 00201 /// a flag result (to ensure it's not CSE'd). 00202 SDOperand getCALLSEQ_START(SDOperand Chain, SDOperand Op) { 00203 std::vector<MVT::ValueType> ResultTys; 00204 ResultTys.push_back(MVT::Other); 00205 ResultTys.push_back(MVT::Flag); 00206 std::vector<SDOperand> Ops; 00207 Ops.push_back(Chain); 00208 Ops.push_back(Op); 00209 return getNode(ISD::CALLSEQ_START, ResultTys, Ops); 00210 } 00211 00212 /// getNode - Gets or creates the specified node. 00213 /// 00214 SDOperand getNode(unsigned Opcode, MVT::ValueType VT); 00215 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N); 00216 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 00217 SDOperand N1, SDOperand N2); 00218 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 00219 SDOperand N1, SDOperand N2, SDOperand N3); 00220 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 00221 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4); 00222 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 00223 SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4, 00224 SDOperand N5); 00225 SDOperand getNode(unsigned Opcode, MVT::ValueType VT, 00226 std::vector<SDOperand> &Children); 00227 SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys, 00228 std::vector<SDOperand> &Ops); 00229 00230 /// getSetCC - Helper function to make it easier to build SetCC's if you just 00231 /// have an ISD::CondCode instead of an SDOperand. 00232 /// 00233 SDOperand getSetCC(MVT::ValueType VT, SDOperand LHS, SDOperand RHS, 00234 ISD::CondCode Cond) { 00235 return getNode(ISD::SETCC, VT, LHS, RHS, getCondCode(Cond)); 00236 } 00237 00238 /// getSelectCC - Helper function to make it easier to build SelectCC's if you 00239 /// just have an ISD::CondCode instead of an SDOperand. 00240 /// 00241 SDOperand getSelectCC(SDOperand LHS, SDOperand RHS, 00242 SDOperand True, SDOperand False, ISD::CondCode Cond) { 00243 MVT::ValueType VT = True.getValueType(); 00244 return getNode(ISD::SELECT_CC, VT, LHS, RHS, True, False,getCondCode(Cond)); 00245 } 00246 00247 /// getVAArg - VAArg produces a result and token chain, and takes a pointer 00248 /// and a source value as input. 00249 SDOperand getVAArg(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr, 00250 SDOperand SV); 00251 00252 /// getLoad - Loads are not normal binary operators: their result type is not 00253 /// determined by their operands, and they produce a value AND a token chain. 00254 /// 00255 SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr, 00256 SDOperand SV); 00257 SDOperand getVecLoad(unsigned Count, MVT::ValueType VT, SDOperand Chain, 00258 SDOperand Ptr, SDOperand SV); 00259 SDOperand getExtLoad(unsigned Opcode, MVT::ValueType VT, SDOperand Chain, 00260 SDOperand Ptr, SDOperand SV, MVT::ValueType EVT); 00261 00262 // getSrcValue - construct a node to track a Value* through the backend 00263 SDOperand getSrcValue(const Value* I, int offset = 0); 00264 00265 /// UpdateNodeOperands - *Mutate* the specified node in-place to have the 00266 /// specified operands. If the resultant node already exists in the DAG, 00267 /// this does not modify the specified node, instead it returns the node that 00268 /// already exists. If the resultant node does not exist in the DAG, the 00269 /// input node is returned. As a degenerate case, if you specify the same 00270 /// input operands as the node already has, the input node is returned. 00271 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op); 00272 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2); 00273 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, 00274 SDOperand Op3); 00275 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, 00276 SDOperand Op3, SDOperand Op4); 00277 SDOperand UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, 00278 SDOperand Op3, SDOperand Op4, SDOperand Op5); 00279 SDOperand UpdateNodeOperands(SDOperand N, const std::vector<SDOperand> &Op); 00280 00281 /// SelectNodeTo - These are used for target selectors to *mutate* the 00282 /// specified node to have the specified return type, Target opcode, and 00283 /// operands. Note that target opcodes are stored as 00284 /// ISD::BUILTIN_OP_END+TargetOpcode in the node opcode field. The 0th value 00285 /// of the resultant node is returned. 00286 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT); 00287 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT, 00288 SDOperand Op1); 00289 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT, 00290 SDOperand Op1, SDOperand Op2); 00291 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT, 00292 SDOperand Op1, SDOperand Op2, SDOperand Op3); 00293 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT, 00294 SDOperand Op1, SDOperand Op2, SDOperand Op3, 00295 SDOperand Op4); 00296 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT, 00297 SDOperand Op1, SDOperand Op2, SDOperand Op3, 00298 SDOperand Op4, SDOperand Op5); 00299 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT, 00300 SDOperand Op1, SDOperand Op2, SDOperand Op3, 00301 SDOperand Op4, SDOperand Op5, SDOperand Op6); 00302 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT, 00303 SDOperand Op1, SDOperand Op2, SDOperand Op3, 00304 SDOperand Op4, SDOperand Op5, SDOperand Op6, 00305 SDOperand Op7); 00306 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT, 00307 SDOperand Op1, SDOperand Op2, SDOperand Op3, 00308 SDOperand Op4, SDOperand Op5, SDOperand Op6, 00309 SDOperand Op7, SDOperand Op8); 00310 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1, 00311 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2); 00312 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1, 00313 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 00314 SDOperand Op3); 00315 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1, 00316 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 00317 SDOperand Op3, SDOperand Op4); 00318 SDOperand SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1, 00319 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 00320 SDOperand Op3, SDOperand Op4, SDOperand Op5); 00321 00322 /// getTargetNode - These are used for target selectors to create a new node 00323 /// with specified return type(s), target opcode, and operands. 00324 /// 00325 /// Note that getTargetNode returns the resultant node. If there is already a 00326 /// node of the specified opcode and operands, it returns that node instead of 00327 /// the current one. 00328 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT); 00329 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT, 00330 SDOperand Op1); 00331 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT, 00332 SDOperand Op1, SDOperand Op2); 00333 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT, 00334 SDOperand Op1, SDOperand Op2, SDOperand Op3); 00335 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT, 00336 SDOperand Op1, SDOperand Op2, SDOperand Op3, 00337 SDOperand Op4); 00338 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT, 00339 SDOperand Op1, SDOperand Op2, SDOperand Op3, 00340 SDOperand Op4, SDOperand Op5); 00341 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT, 00342 SDOperand Op1, SDOperand Op2, SDOperand Op3, 00343 SDOperand Op4, SDOperand Op5, SDOperand Op6); 00344 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT, 00345 SDOperand Op1, SDOperand Op2, SDOperand Op3, 00346 SDOperand Op4, SDOperand Op5, SDOperand Op6, 00347 SDOperand Op7); 00348 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT, 00349 SDOperand Op1, SDOperand Op2, SDOperand Op3, 00350 SDOperand Op4, SDOperand Op5, SDOperand Op6, 00351 SDOperand Op7, SDOperand Op8); 00352 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT, 00353 std::vector<SDOperand> &Ops); 00354 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00355 MVT::ValueType VT2, SDOperand Op1); 00356 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00357 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2); 00358 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00359 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 00360 SDOperand Op3); 00361 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00362 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 00363 SDOperand Op3, SDOperand Op4); 00364 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00365 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 00366 SDOperand Op3, SDOperand Op4, SDOperand Op5); 00367 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00368 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 00369 SDOperand Op3, SDOperand Op4, SDOperand Op5, 00370 SDOperand Op6); 00371 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00372 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 00373 SDOperand Op3, SDOperand Op4, SDOperand Op5, 00374 SDOperand Op6, SDOperand Op7); 00375 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00376 MVT::ValueType VT2, MVT::ValueType VT3, 00377 SDOperand Op1, SDOperand Op2); 00378 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00379 MVT::ValueType VT2, MVT::ValueType VT3, 00380 SDOperand Op1, SDOperand Op2, 00381 SDOperand Op3, SDOperand Op4, SDOperand Op5); 00382 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00383 MVT::ValueType VT2, MVT::ValueType VT3, 00384 SDOperand Op1, SDOperand Op2, 00385 SDOperand Op3, SDOperand Op4, SDOperand Op5, 00386 SDOperand Op6); 00387 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00388 MVT::ValueType VT2, MVT::ValueType VT3, 00389 SDOperand Op1, SDOperand Op2, 00390 SDOperand Op3, SDOperand Op4, SDOperand Op5, 00391 SDOperand Op6, SDOperand Op7); 00392 SDNode *getTargetNode(unsigned Opcode, MVT::ValueType VT1, 00393 MVT::ValueType VT2, std::vector<SDOperand> &Ops); 00394 00395 /// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead. 00396 /// This can cause recursive merging of nodes in the DAG. Use the first 00397 /// version if 'From' is known to have a single result, use the second 00398 /// if you have two nodes with identical results, use the third otherwise. 00399 /// 00400 /// These methods all take an optional vector, which (if not null) is 00401 /// populated with any nodes that are deleted from the SelectionDAG, due to 00402 /// new equivalences that are discovered. 00403 /// 00404 void ReplaceAllUsesWith(SDOperand From, SDOperand Op, 00405 std::vector<SDNode*> *Deleted = 0); 00406 void ReplaceAllUsesWith(SDNode *From, SDNode *To, 00407 std::vector<SDNode*> *Deleted = 0); 00408 void ReplaceAllUsesWith(SDNode *From, const std::vector<SDOperand> &To, 00409 std::vector<SDNode*> *Deleted = 0); 00410 00411 /// ReplaceAllUsesOfValueWith - Replace any uses of From with To, leaving 00412 /// uses of other values produced by From.Val alone. The Deleted vector is 00413 /// handled the same was as for ReplaceAllUsesWith, but it is required for 00414 /// this method. 00415 void ReplaceAllUsesOfValueWith(SDOperand From, SDOperand To, 00416 std::vector<SDNode*> &Deleted); 00417 00418 /// DeleteNode - Remove the specified node from the system. This node must 00419 /// have no referrers. 00420 void DeleteNode(SDNode *N); 00421 00422 void dump() const; 00423 00424 /// InsertISelMapEntry - A helper function to insert a key / element pair 00425 /// into a SDOperand to SDOperand map. This is added to avoid the map 00426 /// insertion operator from being inlined. 00427 static void InsertISelMapEntry(std::map<SDOperand, SDOperand> &Map, 00428 SDNode *Key, unsigned KeyResNo, 00429 SDNode *Element, unsigned ElementResNo); 00430 00431 private: 00432 void RemoveNodeFromCSEMaps(SDNode *N); 00433 SDNode *AddNonLeafNodeToCSEMaps(SDNode *N); 00434 SDNode **FindModifiedNodeSlot(SDNode *N, SDOperand Op); 00435 SDNode **FindModifiedNodeSlot(SDNode *N, SDOperand Op1, SDOperand Op2); 00436 SDNode **FindModifiedNodeSlot(SDNode *N, const std::vector<SDOperand> &Ops); 00437 00438 void DestroyDeadNode(SDNode *N); 00439 void DeleteNodeNotInCSEMaps(SDNode *N); 00440 void setNodeValueTypes(SDNode *N, std::vector<MVT::ValueType> &RetVals); 00441 void setNodeValueTypes(SDNode *N, MVT::ValueType VT1, MVT::ValueType VT2); 00442 00443 00444 /// SimplifySetCC - Try to simplify a setcc built with the specified operands 00445 /// and cc. If unable to simplify it, return a null SDOperand. 00446 SDOperand SimplifySetCC(MVT::ValueType VT, SDOperand N1, 00447 SDOperand N2, ISD::CondCode Cond); 00448 00449 // List of non-single value types. 00450 std::list<std::vector<MVT::ValueType> > VTList; 00451 00452 // Maps to auto-CSE operations. 00453 std::map<std::pair<unsigned, MVT::ValueType>, SDNode *> NullaryOps; 00454 std::map<std::pair<unsigned, std::pair<SDOperand, MVT::ValueType> >, 00455 SDNode *> UnaryOps; 00456 std::map<std::pair<unsigned, std::pair<SDOperand, SDOperand> >, 00457 SDNode *> BinaryOps; 00458 00459 std::map<std::pair<unsigned, MVT::ValueType>, RegisterSDNode*> RegNodes; 00460 std::vector<CondCodeSDNode*> CondCodeNodes; 00461 00462 std::map<std::pair<SDOperand, std::pair<SDOperand, MVT::ValueType> >, 00463 SDNode *> Loads; 00464 00465 std::map<std::pair<const GlobalValue*, int>, SDNode*> GlobalValues; 00466 std::map<std::pair<const GlobalValue*, int>, SDNode*> TargetGlobalValues; 00467 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> Constants; 00468 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstants; 00469 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs; 00470 std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstantFPs; 00471 std::map<int, SDNode*> FrameIndices, TargetFrameIndices; 00472 std::map<std::pair<Constant *, 00473 std::pair<int, unsigned> >, SDNode*> ConstantPoolIndices; 00474 std::map<std::pair<Constant *, 00475 std::pair<int, unsigned> >, SDNode*> TargetConstantPoolIndices; 00476 std::map<MachineBasicBlock *, SDNode*> BBNodes; 00477 std::vector<SDNode*> ValueTypeNodes; 00478 std::map<std::string, SDNode*> ExternalSymbols; 00479 std::map<std::string, SDNode*> TargetExternalSymbols; 00480 std::map<std::string, StringSDNode*> StringNodes; 00481 std::map<std::pair<unsigned, 00482 std::pair<MVT::ValueType, std::vector<SDOperand> > >, 00483 SDNode*> OneResultNodes; 00484 std::map<std::pair<unsigned, 00485 std::pair<std::vector<MVT::ValueType>, 00486 std::vector<SDOperand> > >, 00487 SDNode*> ArbitraryNodes; 00488 }; 00489 00490 template <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> { 00491 typedef SelectionDAG::allnodes_iterator nodes_iterator; 00492 static nodes_iterator nodes_begin(SelectionDAG *G) { 00493 return G->allnodes_begin(); 00494 } 00495 static nodes_iterator nodes_end(SelectionDAG *G) { 00496 return G->allnodes_end(); 00497 } 00498 }; 00499 00500 } // end namespace llvm 00501 00502 #endif