SelectionDAG.cpp revision cf5640bd52e919b6fbb06f231122e718f48dbb12
1//===-- SelectionDAG.cpp - Implement the SelectionDAG data structures -----===// 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 implements the SelectionDAG class. 11// 12//===----------------------------------------------------------------------===// 13 14#include "llvm/CodeGen/SelectionDAG.h" 15#include "llvm/Constants.h" 16#include "llvm/GlobalValue.h" 17#include "llvm/Intrinsics.h" 18#include "llvm/Assembly/Writer.h" 19#include "llvm/CodeGen/MachineBasicBlock.h" 20#include "llvm/CodeGen/MachineConstantPool.h" 21#include "llvm/Support/MathExtras.h" 22#include "llvm/Target/MRegisterInfo.h" 23#include "llvm/Target/TargetLowering.h" 24#include "llvm/Target/TargetInstrInfo.h" 25#include "llvm/Target/TargetMachine.h" 26#include "llvm/ADT/SetVector.h" 27#include "llvm/ADT/SmallVector.h" 28#include "llvm/ADT/StringExtras.h" 29#include <set> 30#include <algorithm> 31#include <cmath> 32using namespace llvm; 33 34/// makeVTList - Return an instance of the SDVTList struct initialized with the 35/// specified members. 36static SDVTList makeVTList(const MVT::ValueType *VTs, unsigned NumVTs) { 37 SDVTList Res = {VTs, NumVTs}; 38 return Res; 39} 40 41//===----------------------------------------------------------------------===// 42// ConstantFPSDNode Class 43//===----------------------------------------------------------------------===// 44 45/// isExactlyValue - We don't rely on operator== working on double values, as 46/// it returns true for things that are clearly not equal, like -0.0 and 0.0. 47/// As such, this method can be used to do an exact bit-for-bit comparison of 48/// two floating point values. 49bool ConstantFPSDNode::isExactlyValue(double V) const { 50 return DoubleToBits(V) == DoubleToBits(Value); 51} 52 53//===----------------------------------------------------------------------===// 54// ISD Namespace 55//===----------------------------------------------------------------------===// 56 57/// isBuildVectorAllOnes - Return true if the specified node is a 58/// BUILD_VECTOR where all of the elements are ~0 or undef. 59bool ISD::isBuildVectorAllOnes(const SDNode *N) { 60 // Look through a bit convert. 61 if (N->getOpcode() == ISD::BIT_CONVERT) 62 N = N->getOperand(0).Val; 63 64 if (N->getOpcode() != ISD::BUILD_VECTOR) return false; 65 66 unsigned i = 0, e = N->getNumOperands(); 67 68 // Skip over all of the undef values. 69 while (i != e && N->getOperand(i).getOpcode() == ISD::UNDEF) 70 ++i; 71 72 // Do not accept an all-undef vector. 73 if (i == e) return false; 74 75 // Do not accept build_vectors that aren't all constants or which have non-~0 76 // elements. 77 SDOperand NotZero = N->getOperand(i); 78 if (isa<ConstantSDNode>(NotZero)) { 79 if (!cast<ConstantSDNode>(NotZero)->isAllOnesValue()) 80 return false; 81 } else if (isa<ConstantFPSDNode>(NotZero)) { 82 MVT::ValueType VT = NotZero.getValueType(); 83 if (VT== MVT::f64) { 84 if (DoubleToBits(cast<ConstantFPSDNode>(NotZero)->getValue()) != 85 (uint64_t)-1) 86 return false; 87 } else { 88 if (FloatToBits(cast<ConstantFPSDNode>(NotZero)->getValue()) != 89 (uint32_t)-1) 90 return false; 91 } 92 } else 93 return false; 94 95 // Okay, we have at least one ~0 value, check to see if the rest match or are 96 // undefs. 97 for (++i; i != e; ++i) 98 if (N->getOperand(i) != NotZero && 99 N->getOperand(i).getOpcode() != ISD::UNDEF) 100 return false; 101 return true; 102} 103 104 105/// isBuildVectorAllZeros - Return true if the specified node is a 106/// BUILD_VECTOR where all of the elements are 0 or undef. 107bool ISD::isBuildVectorAllZeros(const SDNode *N) { 108 // Look through a bit convert. 109 if (N->getOpcode() == ISD::BIT_CONVERT) 110 N = N->getOperand(0).Val; 111 112 if (N->getOpcode() != ISD::BUILD_VECTOR) return false; 113 114 unsigned i = 0, e = N->getNumOperands(); 115 116 // Skip over all of the undef values. 117 while (i != e && N->getOperand(i).getOpcode() == ISD::UNDEF) 118 ++i; 119 120 // Do not accept an all-undef vector. 121 if (i == e) return false; 122 123 // Do not accept build_vectors that aren't all constants or which have non-~0 124 // elements. 125 SDOperand Zero = N->getOperand(i); 126 if (isa<ConstantSDNode>(Zero)) { 127 if (!cast<ConstantSDNode>(Zero)->isNullValue()) 128 return false; 129 } else if (isa<ConstantFPSDNode>(Zero)) { 130 if (!cast<ConstantFPSDNode>(Zero)->isExactlyValue(0.0)) 131 return false; 132 } else 133 return false; 134 135 // Okay, we have at least one ~0 value, check to see if the rest match or are 136 // undefs. 137 for (++i; i != e; ++i) 138 if (N->getOperand(i) != Zero && 139 N->getOperand(i).getOpcode() != ISD::UNDEF) 140 return false; 141 return true; 142} 143 144/// getSetCCSwappedOperands - Return the operation corresponding to (Y op X) 145/// when given the operation for (X op Y). 146ISD::CondCode ISD::getSetCCSwappedOperands(ISD::CondCode Operation) { 147 // To perform this operation, we just need to swap the L and G bits of the 148 // operation. 149 unsigned OldL = (Operation >> 2) & 1; 150 unsigned OldG = (Operation >> 1) & 1; 151 return ISD::CondCode((Operation & ~6) | // Keep the N, U, E bits 152 (OldL << 1) | // New G bit 153 (OldG << 2)); // New L bit. 154} 155 156/// getSetCCInverse - Return the operation corresponding to !(X op Y), where 157/// 'op' is a valid SetCC operation. 158ISD::CondCode ISD::getSetCCInverse(ISD::CondCode Op, bool isInteger) { 159 unsigned Operation = Op; 160 if (isInteger) 161 Operation ^= 7; // Flip L, G, E bits, but not U. 162 else 163 Operation ^= 15; // Flip all of the condition bits. 164 if (Operation > ISD::SETTRUE2) 165 Operation &= ~8; // Don't let N and U bits get set. 166 return ISD::CondCode(Operation); 167} 168 169 170/// isSignedOp - For an integer comparison, return 1 if the comparison is a 171/// signed operation and 2 if the result is an unsigned comparison. Return zero 172/// if the operation does not depend on the sign of the input (setne and seteq). 173static int isSignedOp(ISD::CondCode Opcode) { 174 switch (Opcode) { 175 default: assert(0 && "Illegal integer setcc operation!"); 176 case ISD::SETEQ: 177 case ISD::SETNE: return 0; 178 case ISD::SETLT: 179 case ISD::SETLE: 180 case ISD::SETGT: 181 case ISD::SETGE: return 1; 182 case ISD::SETULT: 183 case ISD::SETULE: 184 case ISD::SETUGT: 185 case ISD::SETUGE: return 2; 186 } 187} 188 189/// getSetCCOrOperation - Return the result of a logical OR between different 190/// comparisons of identical values: ((X op1 Y) | (X op2 Y)). This function 191/// returns SETCC_INVALID if it is not possible to represent the resultant 192/// comparison. 193ISD::CondCode ISD::getSetCCOrOperation(ISD::CondCode Op1, ISD::CondCode Op2, 194 bool isInteger) { 195 if (isInteger && (isSignedOp(Op1) | isSignedOp(Op2)) == 3) 196 // Cannot fold a signed integer setcc with an unsigned integer setcc. 197 return ISD::SETCC_INVALID; 198 199 unsigned Op = Op1 | Op2; // Combine all of the condition bits. 200 201 // If the N and U bits get set then the resultant comparison DOES suddenly 202 // care about orderedness, and is true when ordered. 203 if (Op > ISD::SETTRUE2) 204 Op &= ~16; // Clear the U bit if the N bit is set. 205 206 // Canonicalize illegal integer setcc's. 207 if (isInteger && Op == ISD::SETUNE) // e.g. SETUGT | SETULT 208 Op = ISD::SETNE; 209 210 return ISD::CondCode(Op); 211} 212 213/// getSetCCAndOperation - Return the result of a logical AND between different 214/// comparisons of identical values: ((X op1 Y) & (X op2 Y)). This 215/// function returns zero if it is not possible to represent the resultant 216/// comparison. 217ISD::CondCode ISD::getSetCCAndOperation(ISD::CondCode Op1, ISD::CondCode Op2, 218 bool isInteger) { 219 if (isInteger && (isSignedOp(Op1) | isSignedOp(Op2)) == 3) 220 // Cannot fold a signed setcc with an unsigned setcc. 221 return ISD::SETCC_INVALID; 222 223 // Combine all of the condition bits. 224 ISD::CondCode Result = ISD::CondCode(Op1 & Op2); 225 226 // Canonicalize illegal integer setcc's. 227 if (isInteger) { 228 switch (Result) { 229 default: break; 230 case ISD::SETUO : Result = ISD::SETFALSE; break; // SETUGT & SETULT 231 case ISD::SETUEQ: Result = ISD::SETEQ ; break; // SETUGE & SETULE 232 case ISD::SETOLT: Result = ISD::SETULT ; break; // SETULT & SETNE 233 case ISD::SETOGT: Result = ISD::SETUGT ; break; // SETUGT & SETNE 234 } 235 } 236 237 return Result; 238} 239 240const TargetMachine &SelectionDAG::getTarget() const { 241 return TLI.getTargetMachine(); 242} 243 244//===----------------------------------------------------------------------===// 245// SDNode Profile Support 246//===----------------------------------------------------------------------===// 247 248/// AddNodeIDOpcode - Add the node opcode to the NodeID data. 249/// 250static void AddNodeIDOpcode(FoldingSetNodeID &ID, unsigned OpC) { 251 ID.AddInteger(OpC); 252} 253 254/// AddNodeIDValueTypes - Value type lists are intern'd so we can represent them 255/// solely with their pointer. 256void AddNodeIDValueTypes(FoldingSetNodeID &ID, SDVTList VTList) { 257 ID.AddPointer(VTList.VTs); 258} 259 260/// AddNodeIDOperand - Add an operands data to the NodeID data. 261/// 262static void AddNodeIDOperand(FoldingSetNodeID &ID, SDOperand Op) { 263 ID.AddPointer(Op.Val); 264 ID.AddInteger(Op.ResNo); 265} 266 267/// AddNodeIDOperands - Various routines for adding operands to the NodeID data. 268/// 269static void AddNodeIDOperands(FoldingSetNodeID &ID) { 270} 271static void AddNodeIDOperands(FoldingSetNodeID &ID, SDOperand Op) { 272 AddNodeIDOperand(ID, Op); 273} 274static void AddNodeIDOperands(FoldingSetNodeID &ID, 275 SDOperand Op1, SDOperand Op2) { 276 AddNodeIDOperand(ID, Op1); 277 AddNodeIDOperand(ID, Op2); 278} 279static void AddNodeIDOperands(FoldingSetNodeID &ID, 280 SDOperand Op1, SDOperand Op2, SDOperand Op3) { 281 AddNodeIDOperand(ID, Op1); 282 AddNodeIDOperand(ID, Op2); 283 AddNodeIDOperand(ID, Op3); 284} 285static void AddNodeIDOperands(FoldingSetNodeID &ID, 286 const SDOperand *Ops, unsigned NumOps) { 287 for (; NumOps; --NumOps, ++Ops) 288 AddNodeIDOperand(ID, *Ops); 289} 290 291/// AddNodeIDOperands - Various routines for adding node info to the NodeID 292/// data. 293static void AddNodeIDNode(FoldingSetNodeID &ID, 294 unsigned short OpC, SDVTList VTList) { 295 AddNodeIDOpcode(ID, OpC); 296 AddNodeIDValueTypes(ID, VTList); 297 AddNodeIDOperands(ID); 298} 299static void AddNodeIDNode(FoldingSetNodeID &ID, 300 unsigned short OpC, SDVTList VTList, 301 SDOperand Op) { 302 AddNodeIDOpcode(ID, OpC); 303 AddNodeIDValueTypes(ID, VTList); 304 AddNodeIDOperands(ID, Op); 305} 306static void AddNodeIDNode(FoldingSetNodeID &ID, 307 unsigned short OpC, SDVTList VTList, 308 SDOperand Op1, SDOperand Op2) { 309 AddNodeIDOpcode(ID, OpC); 310 AddNodeIDValueTypes(ID, VTList); 311 AddNodeIDOperands(ID, Op1, Op2); 312} 313static void AddNodeIDNode(FoldingSetNodeID &ID, 314 unsigned short OpC, SDVTList VTList, 315 SDOperand Op1, SDOperand Op2, SDOperand Op3) { 316 AddNodeIDOpcode(ID, OpC); 317 AddNodeIDValueTypes(ID, VTList); 318 AddNodeIDOperands(ID, Op1, Op2, Op3); 319} 320static void AddNodeIDNode(FoldingSetNodeID &ID, 321 unsigned short OpC, SDVTList VTList, 322 const SDOperand *OpList, unsigned N) { 323 AddNodeIDOpcode(ID, OpC); 324 AddNodeIDValueTypes(ID, VTList); 325 AddNodeIDOperands(ID, OpList, N); 326} 327 328/// AddNodeIDNode - Generic routine for adding a nodes info to the NodeID 329/// data. 330static void AddNodeIDNode(FoldingSetNodeID &ID, SDNode *N) { 331 AddNodeIDOpcode(ID, N->getOpcode()); 332 // Add the return value info. 333 AddNodeIDValueTypes(ID, N->getVTList()); 334 // Add the operand info. 335 AddNodeIDOperands(ID, N->op_begin(), N->getNumOperands()); 336 337 // Handle SDNode leafs with special info. 338 if (N->getNumOperands() == 0) { 339 switch (N->getOpcode()) { 340 default: break; // Normal nodes don't need extra info. 341 case ISD::TargetConstant: 342 case ISD::Constant: 343 ID.AddInteger(cast<ConstantSDNode>(N)->getValue()); 344 break; 345 case ISD::TargetConstantFP: 346 case ISD::ConstantFP: 347 ID.AddDouble(cast<ConstantFPSDNode>(N)->getValue()); 348 break; 349 case ISD::TargetGlobalAddress: 350 case ISD::GlobalAddress: { 351 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(N); 352 ID.AddPointer(GA->getGlobal()); 353 ID.AddInteger(GA->getOffset()); 354 break; 355 } 356 case ISD::BasicBlock: 357 ID.AddPointer(cast<BasicBlockSDNode>(N)->getBasicBlock()); 358 break; 359 case ISD::Register: 360 ID.AddInteger(cast<RegisterSDNode>(N)->getReg()); 361 break; 362 case ISD::SRCVALUE: { 363 SrcValueSDNode *SV = cast<SrcValueSDNode>(N); 364 ID.AddPointer(SV->getValue()); 365 ID.AddInteger(SV->getOffset()); 366 break; 367 } 368 case ISD::FrameIndex: 369 case ISD::TargetFrameIndex: 370 ID.AddInteger(cast<FrameIndexSDNode>(N)->getIndex()); 371 break; 372 case ISD::JumpTable: 373 case ISD::TargetJumpTable: 374 ID.AddInteger(cast<JumpTableSDNode>(N)->getIndex()); 375 break; 376 case ISD::ConstantPool: 377 case ISD::TargetConstantPool: { 378 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(N); 379 ID.AddInteger(CP->getAlignment()); 380 ID.AddInteger(CP->getOffset()); 381 if (CP->isMachineConstantPoolEntry()) 382 CP->getMachineCPVal()->AddSelectionDAGCSEId(ID); 383 else 384 ID.AddPointer(CP->getConstVal()); 385 break; 386 } 387 case ISD::LOAD: { 388 LoadSDNode *LD = cast<LoadSDNode>(N); 389 ID.AddInteger(LD->getAddressingMode()); 390 ID.AddInteger(LD->getExtensionType()); 391 ID.AddInteger(LD->getLoadedVT()); 392 ID.AddPointer(LD->getSrcValue()); 393 ID.AddInteger(LD->getSrcValueOffset()); 394 ID.AddInteger(LD->getAlignment()); 395 ID.AddInteger(LD->isVolatile()); 396 break; 397 } 398 case ISD::STORE: { 399 StoreSDNode *ST = cast<StoreSDNode>(N); 400 ID.AddInteger(ST->getAddressingMode()); 401 ID.AddInteger(ST->isTruncatingStore()); 402 ID.AddInteger(ST->getStoredVT()); 403 ID.AddPointer(ST->getSrcValue()); 404 ID.AddInteger(ST->getSrcValueOffset()); 405 ID.AddInteger(ST->getAlignment()); 406 ID.AddInteger(ST->isVolatile()); 407 break; 408 } 409 } 410 } 411} 412 413//===----------------------------------------------------------------------===// 414// SelectionDAG Class 415//===----------------------------------------------------------------------===// 416 417/// RemoveDeadNodes - This method deletes all unreachable nodes in the 418/// SelectionDAG. 419void SelectionDAG::RemoveDeadNodes() { 420 // Create a dummy node (which is not added to allnodes), that adds a reference 421 // to the root node, preventing it from being deleted. 422 HandleSDNode Dummy(getRoot()); 423 424 SmallVector<SDNode*, 128> DeadNodes; 425 426 // Add all obviously-dead nodes to the DeadNodes worklist. 427 for (allnodes_iterator I = allnodes_begin(), E = allnodes_end(); I != E; ++I) 428 if (I->use_empty()) 429 DeadNodes.push_back(I); 430 431 // Process the worklist, deleting the nodes and adding their uses to the 432 // worklist. 433 while (!DeadNodes.empty()) { 434 SDNode *N = DeadNodes.back(); 435 DeadNodes.pop_back(); 436 437 // Take the node out of the appropriate CSE map. 438 RemoveNodeFromCSEMaps(N); 439 440 // Next, brutally remove the operand list. This is safe to do, as there are 441 // no cycles in the graph. 442 for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) { 443 SDNode *Operand = I->Val; 444 Operand->removeUser(N); 445 446 // Now that we removed this operand, see if there are no uses of it left. 447 if (Operand->use_empty()) 448 DeadNodes.push_back(Operand); 449 } 450 delete[] N->OperandList; 451 N->OperandList = 0; 452 N->NumOperands = 0; 453 454 // Finally, remove N itself. 455 AllNodes.erase(N); 456 } 457 458 // If the root changed (e.g. it was a dead load, update the root). 459 setRoot(Dummy.getValue()); 460} 461 462void SelectionDAG::RemoveDeadNode(SDNode *N, std::vector<SDNode*> &Deleted) { 463 SmallVector<SDNode*, 16> DeadNodes; 464 DeadNodes.push_back(N); 465 466 // Process the worklist, deleting the nodes and adding their uses to the 467 // worklist. 468 while (!DeadNodes.empty()) { 469 SDNode *N = DeadNodes.back(); 470 DeadNodes.pop_back(); 471 472 // Take the node out of the appropriate CSE map. 473 RemoveNodeFromCSEMaps(N); 474 475 // Next, brutally remove the operand list. This is safe to do, as there are 476 // no cycles in the graph. 477 for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) { 478 SDNode *Operand = I->Val; 479 Operand->removeUser(N); 480 481 // Now that we removed this operand, see if there are no uses of it left. 482 if (Operand->use_empty()) 483 DeadNodes.push_back(Operand); 484 } 485 delete[] N->OperandList; 486 N->OperandList = 0; 487 N->NumOperands = 0; 488 489 // Finally, remove N itself. 490 Deleted.push_back(N); 491 AllNodes.erase(N); 492 } 493} 494 495void SelectionDAG::DeleteNode(SDNode *N) { 496 assert(N->use_empty() && "Cannot delete a node that is not dead!"); 497 498 // First take this out of the appropriate CSE map. 499 RemoveNodeFromCSEMaps(N); 500 501 // Finally, remove uses due to operands of this node, remove from the 502 // AllNodes list, and delete the node. 503 DeleteNodeNotInCSEMaps(N); 504} 505 506void SelectionDAG::DeleteNodeNotInCSEMaps(SDNode *N) { 507 508 // Remove it from the AllNodes list. 509 AllNodes.remove(N); 510 511 // Drop all of the operands and decrement used nodes use counts. 512 for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) 513 I->Val->removeUser(N); 514 delete[] N->OperandList; 515 N->OperandList = 0; 516 N->NumOperands = 0; 517 518 delete N; 519} 520 521/// RemoveNodeFromCSEMaps - Take the specified node out of the CSE map that 522/// correspond to it. This is useful when we're about to delete or repurpose 523/// the node. We don't want future request for structurally identical nodes 524/// to return N anymore. 525void SelectionDAG::RemoveNodeFromCSEMaps(SDNode *N) { 526 bool Erased = false; 527 switch (N->getOpcode()) { 528 case ISD::HANDLENODE: return; // noop. 529 case ISD::STRING: 530 Erased = StringNodes.erase(cast<StringSDNode>(N)->getValue()); 531 break; 532 case ISD::CONDCODE: 533 assert(CondCodeNodes[cast<CondCodeSDNode>(N)->get()] && 534 "Cond code doesn't exist!"); 535 Erased = CondCodeNodes[cast<CondCodeSDNode>(N)->get()] != 0; 536 CondCodeNodes[cast<CondCodeSDNode>(N)->get()] = 0; 537 break; 538 case ISD::ExternalSymbol: 539 Erased = ExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol()); 540 break; 541 case ISD::TargetExternalSymbol: 542 Erased = 543 TargetExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol()); 544 break; 545 case ISD::VALUETYPE: 546 Erased = ValueTypeNodes[cast<VTSDNode>(N)->getVT()] != 0; 547 ValueTypeNodes[cast<VTSDNode>(N)->getVT()] = 0; 548 break; 549 default: 550 // Remove it from the CSE Map. 551 Erased = CSEMap.RemoveNode(N); 552 break; 553 } 554#ifndef NDEBUG 555 // Verify that the node was actually in one of the CSE maps, unless it has a 556 // flag result (which cannot be CSE'd) or is one of the special cases that are 557 // not subject to CSE. 558 if (!Erased && N->getValueType(N->getNumValues()-1) != MVT::Flag && 559 !N->isTargetOpcode()) { 560 N->dump(); 561 cerr << "\n"; 562 assert(0 && "Node is not in map!"); 563 } 564#endif 565} 566 567/// AddNonLeafNodeToCSEMaps - Add the specified node back to the CSE maps. It 568/// has been taken out and modified in some way. If the specified node already 569/// exists in the CSE maps, do not modify the maps, but return the existing node 570/// instead. If it doesn't exist, add it and return null. 571/// 572SDNode *SelectionDAG::AddNonLeafNodeToCSEMaps(SDNode *N) { 573 assert(N->getNumOperands() && "This is a leaf node!"); 574 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag) 575 return 0; // Never add these nodes. 576 577 // Check that remaining values produced are not flags. 578 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i) 579 if (N->getValueType(i) == MVT::Flag) 580 return 0; // Never CSE anything that produces a flag. 581 582 SDNode *New = CSEMap.GetOrInsertNode(N); 583 if (New != N) return New; // Node already existed. 584 return 0; 585} 586 587/// FindModifiedNodeSlot - Find a slot for the specified node if its operands 588/// were replaced with those specified. If this node is never memoized, 589/// return null, otherwise return a pointer to the slot it would take. If a 590/// node already exists with these operands, the slot will be non-null. 591SDNode *SelectionDAG::FindModifiedNodeSlot(SDNode *N, SDOperand Op, 592 void *&InsertPos) { 593 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag) 594 return 0; // Never add these nodes. 595 596 // Check that remaining values produced are not flags. 597 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i) 598 if (N->getValueType(i) == MVT::Flag) 599 return 0; // Never CSE anything that produces a flag. 600 601 FoldingSetNodeID ID; 602 AddNodeIDNode(ID, N->getOpcode(), N->getVTList(), Op); 603 return CSEMap.FindNodeOrInsertPos(ID, InsertPos); 604} 605 606/// FindModifiedNodeSlot - Find a slot for the specified node if its operands 607/// were replaced with those specified. If this node is never memoized, 608/// return null, otherwise return a pointer to the slot it would take. If a 609/// node already exists with these operands, the slot will be non-null. 610SDNode *SelectionDAG::FindModifiedNodeSlot(SDNode *N, 611 SDOperand Op1, SDOperand Op2, 612 void *&InsertPos) { 613 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag) 614 return 0; // Never add these nodes. 615 616 // Check that remaining values produced are not flags. 617 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i) 618 if (N->getValueType(i) == MVT::Flag) 619 return 0; // Never CSE anything that produces a flag. 620 621 FoldingSetNodeID ID; 622 AddNodeIDNode(ID, N->getOpcode(), N->getVTList(), Op1, Op2); 623 return CSEMap.FindNodeOrInsertPos(ID, InsertPos); 624} 625 626 627/// FindModifiedNodeSlot - Find a slot for the specified node if its operands 628/// were replaced with those specified. If this node is never memoized, 629/// return null, otherwise return a pointer to the slot it would take. If a 630/// node already exists with these operands, the slot will be non-null. 631SDNode *SelectionDAG::FindModifiedNodeSlot(SDNode *N, 632 const SDOperand *Ops,unsigned NumOps, 633 void *&InsertPos) { 634 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag) 635 return 0; // Never add these nodes. 636 637 // Check that remaining values produced are not flags. 638 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i) 639 if (N->getValueType(i) == MVT::Flag) 640 return 0; // Never CSE anything that produces a flag. 641 642 FoldingSetNodeID ID; 643 AddNodeIDNode(ID, N->getOpcode(), N->getVTList()); 644 645 if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) { 646 ID.AddInteger(LD->getAddressingMode()); 647 ID.AddInteger(LD->getExtensionType()); 648 ID.AddInteger(LD->getLoadedVT()); 649 ID.AddPointer(LD->getSrcValue()); 650 ID.AddInteger(LD->getSrcValueOffset()); 651 ID.AddInteger(LD->getAlignment()); 652 ID.AddInteger(LD->isVolatile()); 653 } else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) { 654 ID.AddInteger(ST->getAddressingMode()); 655 ID.AddInteger(ST->isTruncatingStore()); 656 ID.AddInteger(ST->getStoredVT()); 657 ID.AddPointer(ST->getSrcValue()); 658 ID.AddInteger(ST->getSrcValueOffset()); 659 ID.AddInteger(ST->getAlignment()); 660 ID.AddInteger(ST->isVolatile()); 661 } 662 663 AddNodeIDOperands(ID, Ops, NumOps); 664 return CSEMap.FindNodeOrInsertPos(ID, InsertPos); 665} 666 667 668SelectionDAG::~SelectionDAG() { 669 while (!AllNodes.empty()) { 670 SDNode *N = AllNodes.begin(); 671 N->SetNextInBucket(0); 672 delete [] N->OperandList; 673 N->OperandList = 0; 674 N->NumOperands = 0; 675 AllNodes.pop_front(); 676 } 677} 678 679SDOperand SelectionDAG::getZeroExtendInReg(SDOperand Op, MVT::ValueType VT) { 680 if (Op.getValueType() == VT) return Op; 681 int64_t Imm = ~0ULL >> (64-MVT::getSizeInBits(VT)); 682 return getNode(ISD::AND, Op.getValueType(), Op, 683 getConstant(Imm, Op.getValueType())); 684} 685 686SDOperand SelectionDAG::getString(const std::string &Val) { 687 StringSDNode *&N = StringNodes[Val]; 688 if (!N) { 689 N = new StringSDNode(Val); 690 AllNodes.push_back(N); 691 } 692 return SDOperand(N, 0); 693} 694 695SDOperand SelectionDAG::getConstant(uint64_t Val, MVT::ValueType VT, bool isT) { 696 assert(MVT::isInteger(VT) && "Cannot create FP integer constant!"); 697 assert(!MVT::isVector(VT) && "Cannot create Vector ConstantSDNodes!"); 698 699 // Mask out any bits that are not valid for this constant. 700 Val &= MVT::getIntVTBitMask(VT); 701 702 unsigned Opc = isT ? ISD::TargetConstant : ISD::Constant; 703 FoldingSetNodeID ID; 704 AddNodeIDNode(ID, Opc, getVTList(VT)); 705 ID.AddInteger(Val); 706 void *IP = 0; 707 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 708 return SDOperand(E, 0); 709 SDNode *N = new ConstantSDNode(isT, Val, VT); 710 CSEMap.InsertNode(N, IP); 711 AllNodes.push_back(N); 712 return SDOperand(N, 0); 713} 714 715 716SDOperand SelectionDAG::getConstantFP(double Val, MVT::ValueType VT, 717 bool isTarget) { 718 assert(MVT::isFloatingPoint(VT) && "Cannot create integer FP constant!"); 719 if (VT == MVT::f32) 720 Val = (float)Val; // Mask out extra precision. 721 722 // Do the map lookup using the actual bit pattern for the floating point 723 // value, so that we don't have problems with 0.0 comparing equal to -0.0, and 724 // we don't have issues with SNANs. 725 unsigned Opc = isTarget ? ISD::TargetConstantFP : ISD::ConstantFP; 726 FoldingSetNodeID ID; 727 AddNodeIDNode(ID, Opc, getVTList(VT)); 728 ID.AddDouble(Val); 729 void *IP = 0; 730 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 731 return SDOperand(E, 0); 732 SDNode *N = new ConstantFPSDNode(isTarget, Val, VT); 733 CSEMap.InsertNode(N, IP); 734 AllNodes.push_back(N); 735 return SDOperand(N, 0); 736} 737 738SDOperand SelectionDAG::getGlobalAddress(const GlobalValue *GV, 739 MVT::ValueType VT, int Offset, 740 bool isTargetGA) { 741 unsigned Opc = isTargetGA ? ISD::TargetGlobalAddress : ISD::GlobalAddress; 742 FoldingSetNodeID ID; 743 AddNodeIDNode(ID, Opc, getVTList(VT)); 744 ID.AddPointer(GV); 745 ID.AddInteger(Offset); 746 void *IP = 0; 747 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 748 return SDOperand(E, 0); 749 SDNode *N = new GlobalAddressSDNode(isTargetGA, GV, VT, Offset); 750 CSEMap.InsertNode(N, IP); 751 AllNodes.push_back(N); 752 return SDOperand(N, 0); 753} 754 755SDOperand SelectionDAG::getFrameIndex(int FI, MVT::ValueType VT, 756 bool isTarget) { 757 unsigned Opc = isTarget ? ISD::TargetFrameIndex : ISD::FrameIndex; 758 FoldingSetNodeID ID; 759 AddNodeIDNode(ID, Opc, getVTList(VT)); 760 ID.AddInteger(FI); 761 void *IP = 0; 762 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 763 return SDOperand(E, 0); 764 SDNode *N = new FrameIndexSDNode(FI, VT, isTarget); 765 CSEMap.InsertNode(N, IP); 766 AllNodes.push_back(N); 767 return SDOperand(N, 0); 768} 769 770SDOperand SelectionDAG::getJumpTable(int JTI, MVT::ValueType VT, bool isTarget){ 771 unsigned Opc = isTarget ? ISD::TargetJumpTable : ISD::JumpTable; 772 FoldingSetNodeID ID; 773 AddNodeIDNode(ID, Opc, getVTList(VT)); 774 ID.AddInteger(JTI); 775 void *IP = 0; 776 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 777 return SDOperand(E, 0); 778 SDNode *N = new JumpTableSDNode(JTI, VT, isTarget); 779 CSEMap.InsertNode(N, IP); 780 AllNodes.push_back(N); 781 return SDOperand(N, 0); 782} 783 784SDOperand SelectionDAG::getConstantPool(Constant *C, MVT::ValueType VT, 785 unsigned Alignment, int Offset, 786 bool isTarget) { 787 unsigned Opc = isTarget ? ISD::TargetConstantPool : ISD::ConstantPool; 788 FoldingSetNodeID ID; 789 AddNodeIDNode(ID, Opc, getVTList(VT)); 790 ID.AddInteger(Alignment); 791 ID.AddInteger(Offset); 792 ID.AddPointer(C); 793 void *IP = 0; 794 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 795 return SDOperand(E, 0); 796 SDNode *N = new ConstantPoolSDNode(isTarget, C, VT, Offset, Alignment); 797 CSEMap.InsertNode(N, IP); 798 AllNodes.push_back(N); 799 return SDOperand(N, 0); 800} 801 802 803SDOperand SelectionDAG::getConstantPool(MachineConstantPoolValue *C, 804 MVT::ValueType VT, 805 unsigned Alignment, int Offset, 806 bool isTarget) { 807 unsigned Opc = isTarget ? ISD::TargetConstantPool : ISD::ConstantPool; 808 FoldingSetNodeID ID; 809 AddNodeIDNode(ID, Opc, getVTList(VT)); 810 ID.AddInteger(Alignment); 811 ID.AddInteger(Offset); 812 C->AddSelectionDAGCSEId(ID); 813 void *IP = 0; 814 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 815 return SDOperand(E, 0); 816 SDNode *N = new ConstantPoolSDNode(isTarget, C, VT, Offset, Alignment); 817 CSEMap.InsertNode(N, IP); 818 AllNodes.push_back(N); 819 return SDOperand(N, 0); 820} 821 822 823SDOperand SelectionDAG::getBasicBlock(MachineBasicBlock *MBB) { 824 FoldingSetNodeID ID; 825 AddNodeIDNode(ID, ISD::BasicBlock, getVTList(MVT::Other)); 826 ID.AddPointer(MBB); 827 void *IP = 0; 828 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 829 return SDOperand(E, 0); 830 SDNode *N = new BasicBlockSDNode(MBB); 831 CSEMap.InsertNode(N, IP); 832 AllNodes.push_back(N); 833 return SDOperand(N, 0); 834} 835 836SDOperand SelectionDAG::getValueType(MVT::ValueType VT) { 837 if ((unsigned)VT >= ValueTypeNodes.size()) 838 ValueTypeNodes.resize(VT+1); 839 if (ValueTypeNodes[VT] == 0) { 840 ValueTypeNodes[VT] = new VTSDNode(VT); 841 AllNodes.push_back(ValueTypeNodes[VT]); 842 } 843 844 return SDOperand(ValueTypeNodes[VT], 0); 845} 846 847SDOperand SelectionDAG::getExternalSymbol(const char *Sym, MVT::ValueType VT) { 848 SDNode *&N = ExternalSymbols[Sym]; 849 if (N) return SDOperand(N, 0); 850 N = new ExternalSymbolSDNode(false, Sym, VT); 851 AllNodes.push_back(N); 852 return SDOperand(N, 0); 853} 854 855SDOperand SelectionDAG::getTargetExternalSymbol(const char *Sym, 856 MVT::ValueType VT) { 857 SDNode *&N = TargetExternalSymbols[Sym]; 858 if (N) return SDOperand(N, 0); 859 N = new ExternalSymbolSDNode(true, Sym, VT); 860 AllNodes.push_back(N); 861 return SDOperand(N, 0); 862} 863 864SDOperand SelectionDAG::getCondCode(ISD::CondCode Cond) { 865 if ((unsigned)Cond >= CondCodeNodes.size()) 866 CondCodeNodes.resize(Cond+1); 867 868 if (CondCodeNodes[Cond] == 0) { 869 CondCodeNodes[Cond] = new CondCodeSDNode(Cond); 870 AllNodes.push_back(CondCodeNodes[Cond]); 871 } 872 return SDOperand(CondCodeNodes[Cond], 0); 873} 874 875SDOperand SelectionDAG::getRegister(unsigned RegNo, MVT::ValueType VT) { 876 FoldingSetNodeID ID; 877 AddNodeIDNode(ID, ISD::Register, getVTList(VT)); 878 ID.AddInteger(RegNo); 879 void *IP = 0; 880 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 881 return SDOperand(E, 0); 882 SDNode *N = new RegisterSDNode(RegNo, VT); 883 CSEMap.InsertNode(N, IP); 884 AllNodes.push_back(N); 885 return SDOperand(N, 0); 886} 887 888SDOperand SelectionDAG::getSrcValue(const Value *V, int Offset) { 889 assert((!V || isa<PointerType>(V->getType())) && 890 "SrcValue is not a pointer?"); 891 892 FoldingSetNodeID ID; 893 AddNodeIDNode(ID, ISD::SRCVALUE, getVTList(MVT::Other)); 894 ID.AddPointer(V); 895 ID.AddInteger(Offset); 896 void *IP = 0; 897 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 898 return SDOperand(E, 0); 899 SDNode *N = new SrcValueSDNode(V, Offset); 900 CSEMap.InsertNode(N, IP); 901 AllNodes.push_back(N); 902 return SDOperand(N, 0); 903} 904 905SDOperand SelectionDAG::FoldSetCC(MVT::ValueType VT, SDOperand N1, 906 SDOperand N2, ISD::CondCode Cond) { 907 // These setcc operations always fold. 908 switch (Cond) { 909 default: break; 910 case ISD::SETFALSE: 911 case ISD::SETFALSE2: return getConstant(0, VT); 912 case ISD::SETTRUE: 913 case ISD::SETTRUE2: return getConstant(1, VT); 914 915 case ISD::SETOEQ: 916 case ISD::SETOGT: 917 case ISD::SETOGE: 918 case ISD::SETOLT: 919 case ISD::SETOLE: 920 case ISD::SETONE: 921 case ISD::SETO: 922 case ISD::SETUO: 923 case ISD::SETUEQ: 924 case ISD::SETUNE: 925 assert(!MVT::isInteger(N1.getValueType()) && "Illegal setcc for integer!"); 926 break; 927 } 928 929 if (ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val)) { 930 uint64_t C2 = N2C->getValue(); 931 if (ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val)) { 932 uint64_t C1 = N1C->getValue(); 933 934 // Sign extend the operands if required 935 if (ISD::isSignedIntSetCC(Cond)) { 936 C1 = N1C->getSignExtended(); 937 C2 = N2C->getSignExtended(); 938 } 939 940 switch (Cond) { 941 default: assert(0 && "Unknown integer setcc!"); 942 case ISD::SETEQ: return getConstant(C1 == C2, VT); 943 case ISD::SETNE: return getConstant(C1 != C2, VT); 944 case ISD::SETULT: return getConstant(C1 < C2, VT); 945 case ISD::SETUGT: return getConstant(C1 > C2, VT); 946 case ISD::SETULE: return getConstant(C1 <= C2, VT); 947 case ISD::SETUGE: return getConstant(C1 >= C2, VT); 948 case ISD::SETLT: return getConstant((int64_t)C1 < (int64_t)C2, VT); 949 case ISD::SETGT: return getConstant((int64_t)C1 > (int64_t)C2, VT); 950 case ISD::SETLE: return getConstant((int64_t)C1 <= (int64_t)C2, VT); 951 case ISD::SETGE: return getConstant((int64_t)C1 >= (int64_t)C2, VT); 952 } 953 } 954 } 955 if (ConstantFPSDNode *N1C = dyn_cast<ConstantFPSDNode>(N1.Val)) 956 if (ConstantFPSDNode *N2C = dyn_cast<ConstantFPSDNode>(N2.Val)) { 957 double C1 = N1C->getValue(), C2 = N2C->getValue(); 958 959 switch (Cond) { 960 default: break; // FIXME: Implement the rest of these! 961 case ISD::SETEQ: return getConstant(C1 == C2, VT); 962 case ISD::SETNE: return getConstant(C1 != C2, VT); 963 case ISD::SETLT: return getConstant(C1 < C2, VT); 964 case ISD::SETGT: return getConstant(C1 > C2, VT); 965 case ISD::SETLE: return getConstant(C1 <= C2, VT); 966 case ISD::SETGE: return getConstant(C1 >= C2, VT); 967 } 968 } else { 969 // Ensure that the constant occurs on the RHS. 970 return getSetCC(VT, N2, N1, ISD::getSetCCSwappedOperands(Cond)); 971 } 972 973 // Could not fold it. 974 return SDOperand(); 975} 976 977 978/// getNode - Gets or creates the specified node. 979/// 980SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT) { 981 FoldingSetNodeID ID; 982 AddNodeIDNode(ID, Opcode, getVTList(VT)); 983 void *IP = 0; 984 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 985 return SDOperand(E, 0); 986 SDNode *N = new SDNode(Opcode, VT); 987 CSEMap.InsertNode(N, IP); 988 989 AllNodes.push_back(N); 990 return SDOperand(N, 0); 991} 992 993SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 994 SDOperand Operand) { 995 unsigned Tmp1; 996 // Constant fold unary operations with an integer constant operand. 997 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Operand.Val)) { 998 uint64_t Val = C->getValue(); 999 switch (Opcode) { 1000 default: break; 1001 case ISD::SIGN_EXTEND: return getConstant(C->getSignExtended(), VT); 1002 case ISD::ANY_EXTEND: 1003 case ISD::ZERO_EXTEND: return getConstant(Val, VT); 1004 case ISD::TRUNCATE: return getConstant(Val, VT); 1005 case ISD::SINT_TO_FP: return getConstantFP(C->getSignExtended(), VT); 1006 case ISD::UINT_TO_FP: return getConstantFP(C->getValue(), VT); 1007 case ISD::BIT_CONVERT: 1008 if (VT == MVT::f32 && C->getValueType(0) == MVT::i32) 1009 return getConstantFP(BitsToFloat(Val), VT); 1010 else if (VT == MVT::f64 && C->getValueType(0) == MVT::i64) 1011 return getConstantFP(BitsToDouble(Val), VT); 1012 break; 1013 case ISD::BSWAP: 1014 switch(VT) { 1015 default: assert(0 && "Invalid bswap!"); break; 1016 case MVT::i16: return getConstant(ByteSwap_16((unsigned short)Val), VT); 1017 case MVT::i32: return getConstant(ByteSwap_32((unsigned)Val), VT); 1018 case MVT::i64: return getConstant(ByteSwap_64(Val), VT); 1019 } 1020 break; 1021 case ISD::CTPOP: 1022 switch(VT) { 1023 default: assert(0 && "Invalid ctpop!"); break; 1024 case MVT::i1: return getConstant(Val != 0, VT); 1025 case MVT::i8: 1026 Tmp1 = (unsigned)Val & 0xFF; 1027 return getConstant(CountPopulation_32(Tmp1), VT); 1028 case MVT::i16: 1029 Tmp1 = (unsigned)Val & 0xFFFF; 1030 return getConstant(CountPopulation_32(Tmp1), VT); 1031 case MVT::i32: 1032 return getConstant(CountPopulation_32((unsigned)Val), VT); 1033 case MVT::i64: 1034 return getConstant(CountPopulation_64(Val), VT); 1035 } 1036 case ISD::CTLZ: 1037 switch(VT) { 1038 default: assert(0 && "Invalid ctlz!"); break; 1039 case MVT::i1: return getConstant(Val == 0, VT); 1040 case MVT::i8: 1041 Tmp1 = (unsigned)Val & 0xFF; 1042 return getConstant(CountLeadingZeros_32(Tmp1)-24, VT); 1043 case MVT::i16: 1044 Tmp1 = (unsigned)Val & 0xFFFF; 1045 return getConstant(CountLeadingZeros_32(Tmp1)-16, VT); 1046 case MVT::i32: 1047 return getConstant(CountLeadingZeros_32((unsigned)Val), VT); 1048 case MVT::i64: 1049 return getConstant(CountLeadingZeros_64(Val), VT); 1050 } 1051 case ISD::CTTZ: 1052 switch(VT) { 1053 default: assert(0 && "Invalid cttz!"); break; 1054 case MVT::i1: return getConstant(Val == 0, VT); 1055 case MVT::i8: 1056 Tmp1 = (unsigned)Val | 0x100; 1057 return getConstant(CountTrailingZeros_32(Tmp1), VT); 1058 case MVT::i16: 1059 Tmp1 = (unsigned)Val | 0x10000; 1060 return getConstant(CountTrailingZeros_32(Tmp1), VT); 1061 case MVT::i32: 1062 return getConstant(CountTrailingZeros_32((unsigned)Val), VT); 1063 case MVT::i64: 1064 return getConstant(CountTrailingZeros_64(Val), VT); 1065 } 1066 } 1067 } 1068 1069 // Constant fold unary operations with an floating point constant operand. 1070 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(Operand.Val)) 1071 switch (Opcode) { 1072 case ISD::FNEG: 1073 return getConstantFP(-C->getValue(), VT); 1074 case ISD::FABS: 1075 return getConstantFP(fabs(C->getValue()), VT); 1076 case ISD::FP_ROUND: 1077 case ISD::FP_EXTEND: 1078 return getConstantFP(C->getValue(), VT); 1079 case ISD::FP_TO_SINT: 1080 return getConstant((int64_t)C->getValue(), VT); 1081 case ISD::FP_TO_UINT: 1082 return getConstant((uint64_t)C->getValue(), VT); 1083 case ISD::BIT_CONVERT: 1084 if (VT == MVT::i32 && C->getValueType(0) == MVT::f32) 1085 return getConstant(FloatToBits(C->getValue()), VT); 1086 else if (VT == MVT::i64 && C->getValueType(0) == MVT::f64) 1087 return getConstant(DoubleToBits(C->getValue()), VT); 1088 break; 1089 } 1090 1091 unsigned OpOpcode = Operand.Val->getOpcode(); 1092 switch (Opcode) { 1093 case ISD::TokenFactor: 1094 return Operand; // Factor of one node? No factor. 1095 case ISD::SIGN_EXTEND: 1096 if (Operand.getValueType() == VT) return Operand; // noop extension 1097 assert(Operand.getValueType() < VT && "Invalid sext node, dst < src!"); 1098 if (OpOpcode == ISD::SIGN_EXTEND || OpOpcode == ISD::ZERO_EXTEND) 1099 return getNode(OpOpcode, VT, Operand.Val->getOperand(0)); 1100 break; 1101 case ISD::ZERO_EXTEND: 1102 if (Operand.getValueType() == VT) return Operand; // noop extension 1103 assert(Operand.getValueType() < VT && "Invalid zext node, dst < src!"); 1104 if (OpOpcode == ISD::ZERO_EXTEND) // (zext (zext x)) -> (zext x) 1105 return getNode(ISD::ZERO_EXTEND, VT, Operand.Val->getOperand(0)); 1106 break; 1107 case ISD::ANY_EXTEND: 1108 if (Operand.getValueType() == VT) return Operand; // noop extension 1109 assert(Operand.getValueType() < VT && "Invalid anyext node, dst < src!"); 1110 if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND) 1111 // (ext (zext x)) -> (zext x) and (ext (sext x)) -> (sext x) 1112 return getNode(OpOpcode, VT, Operand.Val->getOperand(0)); 1113 break; 1114 case ISD::TRUNCATE: 1115 if (Operand.getValueType() == VT) return Operand; // noop truncate 1116 assert(Operand.getValueType() > VT && "Invalid truncate node, src < dst!"); 1117 if (OpOpcode == ISD::TRUNCATE) 1118 return getNode(ISD::TRUNCATE, VT, Operand.Val->getOperand(0)); 1119 else if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND || 1120 OpOpcode == ISD::ANY_EXTEND) { 1121 // If the source is smaller than the dest, we still need an extend. 1122 if (Operand.Val->getOperand(0).getValueType() < VT) 1123 return getNode(OpOpcode, VT, Operand.Val->getOperand(0)); 1124 else if (Operand.Val->getOperand(0).getValueType() > VT) 1125 return getNode(ISD::TRUNCATE, VT, Operand.Val->getOperand(0)); 1126 else 1127 return Operand.Val->getOperand(0); 1128 } 1129 break; 1130 case ISD::BIT_CONVERT: 1131 // Basic sanity checking. 1132 assert(MVT::getSizeInBits(VT) == MVT::getSizeInBits(Operand.getValueType()) 1133 && "Cannot BIT_CONVERT between types of different sizes!"); 1134 if (VT == Operand.getValueType()) return Operand; // noop conversion. 1135 if (OpOpcode == ISD::BIT_CONVERT) // bitconv(bitconv(x)) -> bitconv(x) 1136 return getNode(ISD::BIT_CONVERT, VT, Operand.getOperand(0)); 1137 if (OpOpcode == ISD::UNDEF) 1138 return getNode(ISD::UNDEF, VT); 1139 break; 1140 case ISD::SCALAR_TO_VECTOR: 1141 assert(MVT::isVector(VT) && !MVT::isVector(Operand.getValueType()) && 1142 MVT::getVectorBaseType(VT) == Operand.getValueType() && 1143 "Illegal SCALAR_TO_VECTOR node!"); 1144 break; 1145 case ISD::FNEG: 1146 if (OpOpcode == ISD::FSUB) // -(X-Y) -> (Y-X) 1147 return getNode(ISD::FSUB, VT, Operand.Val->getOperand(1), 1148 Operand.Val->getOperand(0)); 1149 if (OpOpcode == ISD::FNEG) // --X -> X 1150 return Operand.Val->getOperand(0); 1151 break; 1152 case ISD::FABS: 1153 if (OpOpcode == ISD::FNEG) // abs(-X) -> abs(X) 1154 return getNode(ISD::FABS, VT, Operand.Val->getOperand(0)); 1155 break; 1156 } 1157 1158 SDNode *N; 1159 SDVTList VTs = getVTList(VT); 1160 if (VT != MVT::Flag) { // Don't CSE flag producing nodes 1161 FoldingSetNodeID ID; 1162 AddNodeIDNode(ID, Opcode, VTs, Operand); 1163 void *IP = 0; 1164 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1165 return SDOperand(E, 0); 1166 N = new SDNode(Opcode, Operand); 1167 N->setValueTypes(VTs); 1168 CSEMap.InsertNode(N, IP); 1169 } else { 1170 N = new SDNode(Opcode, Operand); 1171 N->setValueTypes(VTs); 1172 } 1173 AllNodes.push_back(N); 1174 return SDOperand(N, 0); 1175} 1176 1177 1178 1179SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 1180 SDOperand N1, SDOperand N2) { 1181#ifndef NDEBUG 1182 switch (Opcode) { 1183 case ISD::TokenFactor: 1184 assert(VT == MVT::Other && N1.getValueType() == MVT::Other && 1185 N2.getValueType() == MVT::Other && "Invalid token factor!"); 1186 break; 1187 case ISD::AND: 1188 case ISD::OR: 1189 case ISD::XOR: 1190 case ISD::UDIV: 1191 case ISD::UREM: 1192 case ISD::MULHU: 1193 case ISD::MULHS: 1194 assert(MVT::isInteger(VT) && "This operator does not apply to FP types!"); 1195 // fall through 1196 case ISD::ADD: 1197 case ISD::SUB: 1198 case ISD::MUL: 1199 case ISD::SDIV: 1200 case ISD::SREM: 1201 assert(MVT::isInteger(N1.getValueType()) && "Should use F* for FP ops"); 1202 // fall through. 1203 case ISD::FADD: 1204 case ISD::FSUB: 1205 case ISD::FMUL: 1206 case ISD::FDIV: 1207 case ISD::FREM: 1208 assert(N1.getValueType() == N2.getValueType() && 1209 N1.getValueType() == VT && "Binary operator types must match!"); 1210 break; 1211 case ISD::FCOPYSIGN: // N1 and result must match. N1/N2 need not match. 1212 assert(N1.getValueType() == VT && 1213 MVT::isFloatingPoint(N1.getValueType()) && 1214 MVT::isFloatingPoint(N2.getValueType()) && 1215 "Invalid FCOPYSIGN!"); 1216 break; 1217 case ISD::SHL: 1218 case ISD::SRA: 1219 case ISD::SRL: 1220 case ISD::ROTL: 1221 case ISD::ROTR: 1222 assert(VT == N1.getValueType() && 1223 "Shift operators return type must be the same as their first arg"); 1224 assert(MVT::isInteger(VT) && MVT::isInteger(N2.getValueType()) && 1225 VT != MVT::i1 && "Shifts only work on integers"); 1226 break; 1227 case ISD::FP_ROUND_INREG: { 1228 MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT(); 1229 assert(VT == N1.getValueType() && "Not an inreg round!"); 1230 assert(MVT::isFloatingPoint(VT) && MVT::isFloatingPoint(EVT) && 1231 "Cannot FP_ROUND_INREG integer types"); 1232 assert(EVT <= VT && "Not rounding down!"); 1233 break; 1234 } 1235 case ISD::AssertSext: 1236 case ISD::AssertZext: 1237 case ISD::SIGN_EXTEND_INREG: { 1238 MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT(); 1239 assert(VT == N1.getValueType() && "Not an inreg extend!"); 1240 assert(MVT::isInteger(VT) && MVT::isInteger(EVT) && 1241 "Cannot *_EXTEND_INREG FP types"); 1242 assert(EVT <= VT && "Not extending!"); 1243 } 1244 1245 default: break; 1246 } 1247#endif 1248 1249 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val); 1250 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val); 1251 if (N1C) { 1252 if (Opcode == ISD::SIGN_EXTEND_INREG) { 1253 int64_t Val = N1C->getValue(); 1254 unsigned FromBits = MVT::getSizeInBits(cast<VTSDNode>(N2)->getVT()); 1255 Val <<= 64-FromBits; 1256 Val >>= 64-FromBits; 1257 return getConstant(Val, VT); 1258 } 1259 1260 if (N2C) { 1261 uint64_t C1 = N1C->getValue(), C2 = N2C->getValue(); 1262 switch (Opcode) { 1263 case ISD::ADD: return getConstant(C1 + C2, VT); 1264 case ISD::SUB: return getConstant(C1 - C2, VT); 1265 case ISD::MUL: return getConstant(C1 * C2, VT); 1266 case ISD::UDIV: 1267 if (C2) return getConstant(C1 / C2, VT); 1268 break; 1269 case ISD::UREM : 1270 if (C2) return getConstant(C1 % C2, VT); 1271 break; 1272 case ISD::SDIV : 1273 if (C2) return getConstant(N1C->getSignExtended() / 1274 N2C->getSignExtended(), VT); 1275 break; 1276 case ISD::SREM : 1277 if (C2) return getConstant(N1C->getSignExtended() % 1278 N2C->getSignExtended(), VT); 1279 break; 1280 case ISD::AND : return getConstant(C1 & C2, VT); 1281 case ISD::OR : return getConstant(C1 | C2, VT); 1282 case ISD::XOR : return getConstant(C1 ^ C2, VT); 1283 case ISD::SHL : return getConstant(C1 << C2, VT); 1284 case ISD::SRL : return getConstant(C1 >> C2, VT); 1285 case ISD::SRA : return getConstant(N1C->getSignExtended() >>(int)C2, VT); 1286 case ISD::ROTL : 1287 return getConstant((C1 << C2) | (C1 >> (MVT::getSizeInBits(VT) - C2)), 1288 VT); 1289 case ISD::ROTR : 1290 return getConstant((C1 >> C2) | (C1 << (MVT::getSizeInBits(VT) - C2)), 1291 VT); 1292 default: break; 1293 } 1294 } else { // Cannonicalize constant to RHS if commutative 1295 if (isCommutativeBinOp(Opcode)) { 1296 std::swap(N1C, N2C); 1297 std::swap(N1, N2); 1298 } 1299 } 1300 } 1301 1302 ConstantFPSDNode *N1CFP = dyn_cast<ConstantFPSDNode>(N1.Val); 1303 ConstantFPSDNode *N2CFP = dyn_cast<ConstantFPSDNode>(N2.Val); 1304 if (N1CFP) { 1305 if (N2CFP) { 1306 double C1 = N1CFP->getValue(), C2 = N2CFP->getValue(); 1307 switch (Opcode) { 1308 case ISD::FADD: return getConstantFP(C1 + C2, VT); 1309 case ISD::FSUB: return getConstantFP(C1 - C2, VT); 1310 case ISD::FMUL: return getConstantFP(C1 * C2, VT); 1311 case ISD::FDIV: 1312 if (C2) return getConstantFP(C1 / C2, VT); 1313 break; 1314 case ISD::FREM : 1315 if (C2) return getConstantFP(fmod(C1, C2), VT); 1316 break; 1317 case ISD::FCOPYSIGN: { 1318 union { 1319 double F; 1320 uint64_t I; 1321 } u1; 1322 union { 1323 double F; 1324 int64_t I; 1325 } u2; 1326 u1.F = C1; 1327 u2.F = C2; 1328 if (u2.I < 0) // Sign bit of RHS set? 1329 u1.I |= 1ULL << 63; // Set the sign bit of the LHS. 1330 else 1331 u1.I &= (1ULL << 63)-1; // Clear the sign bit of the LHS. 1332 return getConstantFP(u1.F, VT); 1333 } 1334 default: break; 1335 } 1336 } else { // Cannonicalize constant to RHS if commutative 1337 if (isCommutativeBinOp(Opcode)) { 1338 std::swap(N1CFP, N2CFP); 1339 std::swap(N1, N2); 1340 } 1341 } 1342 } 1343 1344 // Canonicalize an UNDEF to the RHS, even over a constant. 1345 if (N1.getOpcode() == ISD::UNDEF) { 1346 if (isCommutativeBinOp(Opcode)) { 1347 std::swap(N1, N2); 1348 } else { 1349 switch (Opcode) { 1350 case ISD::FP_ROUND_INREG: 1351 case ISD::SIGN_EXTEND_INREG: 1352 case ISD::SUB: 1353 case ISD::FSUB: 1354 case ISD::FDIV: 1355 case ISD::FREM: 1356 case ISD::SRA: 1357 return N1; // fold op(undef, arg2) -> undef 1358 case ISD::UDIV: 1359 case ISD::SDIV: 1360 case ISD::UREM: 1361 case ISD::SREM: 1362 case ISD::SRL: 1363 case ISD::SHL: 1364 return getConstant(0, VT); // fold op(undef, arg2) -> 0 1365 } 1366 } 1367 } 1368 1369 // Fold a bunch of operators when the RHS is undef. 1370 if (N2.getOpcode() == ISD::UNDEF) { 1371 switch (Opcode) { 1372 case ISD::ADD: 1373 case ISD::SUB: 1374 case ISD::FADD: 1375 case ISD::FSUB: 1376 case ISD::FMUL: 1377 case ISD::FDIV: 1378 case ISD::FREM: 1379 case ISD::UDIV: 1380 case ISD::SDIV: 1381 case ISD::UREM: 1382 case ISD::SREM: 1383 case ISD::XOR: 1384 return N2; // fold op(arg1, undef) -> undef 1385 case ISD::MUL: 1386 case ISD::AND: 1387 case ISD::SRL: 1388 case ISD::SHL: 1389 return getConstant(0, VT); // fold op(arg1, undef) -> 0 1390 case ISD::OR: 1391 return getConstant(MVT::getIntVTBitMask(VT), VT); 1392 case ISD::SRA: 1393 return N1; 1394 } 1395 } 1396 1397 // Fold operations. 1398 switch (Opcode) { 1399 case ISD::AND: 1400 // (X & 0) -> 0. This commonly occurs when legalizing i64 values, so it's 1401 // worth handling here. 1402 if (N2C && N2C->getValue() == 0) 1403 return N2; 1404 break; 1405 case ISD::OR: 1406 case ISD::XOR: 1407 // (X ^| 0) -> X. This commonly occurs when legalizing i64 values, so it's 1408 // worth handling here. 1409 if (N2C && N2C->getValue() == 0) 1410 return N1; 1411 break; 1412 case ISD::FP_ROUND_INREG: 1413 if (cast<VTSDNode>(N2)->getVT() == VT) return N1; // Not actually rounding. 1414 break; 1415 case ISD::SIGN_EXTEND_INREG: { 1416 MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT(); 1417 if (EVT == VT) return N1; // Not actually extending 1418 break; 1419 } 1420 case ISD::EXTRACT_ELEMENT: 1421 assert(N2C && (unsigned)N2C->getValue() < 2 && "Bad EXTRACT_ELEMENT!"); 1422 1423 // EXTRACT_ELEMENT of BUILD_PAIR is often formed while legalize is expanding 1424 // 64-bit integers into 32-bit parts. Instead of building the extract of 1425 // the BUILD_PAIR, only to have legalize rip it apart, just do it now. 1426 if (N1.getOpcode() == ISD::BUILD_PAIR) 1427 return N1.getOperand(N2C->getValue()); 1428 1429 // EXTRACT_ELEMENT of a constant int is also very common. 1430 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N1)) { 1431 unsigned Shift = MVT::getSizeInBits(VT) * N2C->getValue(); 1432 return getConstant(C->getValue() >> Shift, VT); 1433 } 1434 break; 1435 1436 // FIXME: figure out how to safely handle things like 1437 // int foo(int x) { return 1 << (x & 255); } 1438 // int bar() { return foo(256); } 1439#if 0 1440 case ISD::SHL: 1441 case ISD::SRL: 1442 case ISD::SRA: 1443 if (N2.getOpcode() == ISD::SIGN_EXTEND_INREG && 1444 cast<VTSDNode>(N2.getOperand(1))->getVT() != MVT::i1) 1445 return getNode(Opcode, VT, N1, N2.getOperand(0)); 1446 else if (N2.getOpcode() == ISD::AND) 1447 if (ConstantSDNode *AndRHS = dyn_cast<ConstantSDNode>(N2.getOperand(1))) { 1448 // If the and is only masking out bits that cannot effect the shift, 1449 // eliminate the and. 1450 unsigned NumBits = MVT::getSizeInBits(VT); 1451 if ((AndRHS->getValue() & (NumBits-1)) == NumBits-1) 1452 return getNode(Opcode, VT, N1, N2.getOperand(0)); 1453 } 1454 break; 1455#endif 1456 } 1457 1458 // Memoize this node if possible. 1459 SDNode *N; 1460 SDVTList VTs = getVTList(VT); 1461 if (VT != MVT::Flag) { 1462 FoldingSetNodeID ID; 1463 AddNodeIDNode(ID, Opcode, VTs, N1, N2); 1464 void *IP = 0; 1465 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1466 return SDOperand(E, 0); 1467 N = new SDNode(Opcode, N1, N2); 1468 N->setValueTypes(VTs); 1469 CSEMap.InsertNode(N, IP); 1470 } else { 1471 N = new SDNode(Opcode, N1, N2); 1472 N->setValueTypes(VTs); 1473 } 1474 1475 AllNodes.push_back(N); 1476 return SDOperand(N, 0); 1477} 1478 1479SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 1480 SDOperand N1, SDOperand N2, SDOperand N3) { 1481 // Perform various simplifications. 1482 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val); 1483 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val); 1484 switch (Opcode) { 1485 case ISD::SETCC: { 1486 // Use FoldSetCC to simplify SETCC's. 1487 SDOperand Simp = FoldSetCC(VT, N1, N2, cast<CondCodeSDNode>(N3)->get()); 1488 if (Simp.Val) return Simp; 1489 break; 1490 } 1491 case ISD::SELECT: 1492 if (N1C) 1493 if (N1C->getValue()) 1494 return N2; // select true, X, Y -> X 1495 else 1496 return N3; // select false, X, Y -> Y 1497 1498 if (N2 == N3) return N2; // select C, X, X -> X 1499 break; 1500 case ISD::BRCOND: 1501 if (N2C) 1502 if (N2C->getValue()) // Unconditional branch 1503 return getNode(ISD::BR, MVT::Other, N1, N3); 1504 else 1505 return N1; // Never-taken branch 1506 break; 1507 case ISD::VECTOR_SHUFFLE: 1508 assert(VT == N1.getValueType() && VT == N2.getValueType() && 1509 MVT::isVector(VT) && MVT::isVector(N3.getValueType()) && 1510 N3.getOpcode() == ISD::BUILD_VECTOR && 1511 MVT::getVectorNumElements(VT) == N3.getNumOperands() && 1512 "Illegal VECTOR_SHUFFLE node!"); 1513 break; 1514 } 1515 1516 // Memoize node if it doesn't produce a flag. 1517 SDNode *N; 1518 SDVTList VTs = getVTList(VT); 1519 if (VT != MVT::Flag) { 1520 FoldingSetNodeID ID; 1521 AddNodeIDNode(ID, Opcode, VTs, N1, N2, N3); 1522 void *IP = 0; 1523 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1524 return SDOperand(E, 0); 1525 N = new SDNode(Opcode, N1, N2, N3); 1526 N->setValueTypes(VTs); 1527 CSEMap.InsertNode(N, IP); 1528 } else { 1529 N = new SDNode(Opcode, N1, N2, N3); 1530 N->setValueTypes(VTs); 1531 } 1532 AllNodes.push_back(N); 1533 return SDOperand(N, 0); 1534} 1535 1536SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 1537 SDOperand N1, SDOperand N2, SDOperand N3, 1538 SDOperand N4) { 1539 SDOperand Ops[] = { N1, N2, N3, N4 }; 1540 return getNode(Opcode, VT, Ops, 4); 1541} 1542 1543SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 1544 SDOperand N1, SDOperand N2, SDOperand N3, 1545 SDOperand N4, SDOperand N5) { 1546 SDOperand Ops[] = { N1, N2, N3, N4, N5 }; 1547 return getNode(Opcode, VT, Ops, 5); 1548} 1549 1550SDOperand SelectionDAG::getLoad(MVT::ValueType VT, 1551 SDOperand Chain, SDOperand Ptr, 1552 const Value *SV, int SVOffset, 1553 bool isVolatile) { 1554 // FIXME: Alignment == 1 for now. 1555 unsigned Alignment = 1; 1556 SDVTList VTs = getVTList(VT, MVT::Other); 1557 SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType()); 1558 FoldingSetNodeID ID; 1559 AddNodeIDNode(ID, ISD::LOAD, VTs, Chain, Ptr, Undef); 1560 ID.AddInteger(ISD::UNINDEXED); 1561 ID.AddInteger(ISD::NON_EXTLOAD); 1562 ID.AddInteger(VT); 1563 ID.AddPointer(SV); 1564 ID.AddInteger(SVOffset); 1565 ID.AddInteger(Alignment); 1566 ID.AddInteger(isVolatile); 1567 void *IP = 0; 1568 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1569 return SDOperand(E, 0); 1570 SDNode *N = new LoadSDNode(Chain, Ptr, Undef, ISD::UNINDEXED, 1571 ISD::NON_EXTLOAD, VT, SV, SVOffset, Alignment, 1572 isVolatile); 1573 N->setValueTypes(VTs); 1574 CSEMap.InsertNode(N, IP); 1575 AllNodes.push_back(N); 1576 return SDOperand(N, 0); 1577} 1578 1579SDOperand SelectionDAG::getExtLoad(ISD::LoadExtType ExtType, MVT::ValueType VT, 1580 SDOperand Chain, SDOperand Ptr, 1581 const Value *SV, 1582 int SVOffset, MVT::ValueType EVT, 1583 bool isVolatile) { 1584 // If they are asking for an extending load from/to the same thing, return a 1585 // normal load. 1586 if (VT == EVT) 1587 ExtType = ISD::NON_EXTLOAD; 1588 1589 if (MVT::isVector(VT)) 1590 assert(EVT == MVT::getVectorBaseType(VT) && "Invalid vector extload!"); 1591 else 1592 assert(EVT < VT && "Should only be an extending load, not truncating!"); 1593 assert((ExtType == ISD::EXTLOAD || MVT::isInteger(VT)) && 1594 "Cannot sign/zero extend a FP/Vector load!"); 1595 assert(MVT::isInteger(VT) == MVT::isInteger(EVT) && 1596 "Cannot convert from FP to Int or Int -> FP!"); 1597 1598 // FIXME: Alignment == 1 for now. 1599 unsigned Alignment = 1; 1600 SDVTList VTs = getVTList(VT, MVT::Other); 1601 SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType()); 1602 FoldingSetNodeID ID; 1603 AddNodeIDNode(ID, ISD::LOAD, VTs, Chain, Ptr, Undef); 1604 ID.AddInteger(ISD::UNINDEXED); 1605 ID.AddInteger(ExtType); 1606 ID.AddInteger(EVT); 1607 ID.AddPointer(SV); 1608 ID.AddInteger(SVOffset); 1609 ID.AddInteger(Alignment); 1610 ID.AddInteger(isVolatile); 1611 void *IP = 0; 1612 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1613 return SDOperand(E, 0); 1614 SDNode *N = new LoadSDNode(Chain, Ptr, Undef, ISD::UNINDEXED, ExtType, EVT, 1615 SV, SVOffset, Alignment, isVolatile); 1616 N->setValueTypes(VTs); 1617 CSEMap.InsertNode(N, IP); 1618 AllNodes.push_back(N); 1619 return SDOperand(N, 0); 1620} 1621 1622SDOperand 1623SelectionDAG::getIndexedLoad(SDOperand OrigLoad, SDOperand Base, 1624 SDOperand Offset, ISD::MemIndexedMode AM) { 1625 LoadSDNode *LD = cast<LoadSDNode>(OrigLoad); 1626 assert(LD->getOffset().getOpcode() == ISD::UNDEF && 1627 "Load is already a indexed load!"); 1628 MVT::ValueType VT = OrigLoad.getValueType(); 1629 SDVTList VTs = getVTList(VT, Base.getValueType(), MVT::Other); 1630 FoldingSetNodeID ID; 1631 AddNodeIDNode(ID, ISD::LOAD, VTs, LD->getChain(), Base, Offset); 1632 ID.AddInteger(AM); 1633 ID.AddInteger(LD->getExtensionType()); 1634 ID.AddInteger(LD->getLoadedVT()); 1635 ID.AddPointer(LD->getSrcValue()); 1636 ID.AddInteger(LD->getSrcValueOffset()); 1637 ID.AddInteger(LD->getAlignment()); 1638 ID.AddInteger(LD->isVolatile()); 1639 void *IP = 0; 1640 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1641 return SDOperand(E, 0); 1642 SDNode *N = new LoadSDNode(LD->getChain(), Base, Offset, AM, 1643 LD->getExtensionType(), LD->getLoadedVT(), 1644 LD->getSrcValue(), LD->getSrcValueOffset(), 1645 LD->getAlignment(), LD->isVolatile()); 1646 N->setValueTypes(VTs); 1647 CSEMap.InsertNode(N, IP); 1648 AllNodes.push_back(N); 1649 return SDOperand(N, 0); 1650} 1651 1652SDOperand SelectionDAG::getVecLoad(unsigned Count, MVT::ValueType EVT, 1653 SDOperand Chain, SDOperand Ptr, 1654 SDOperand SV) { 1655 SDOperand Ops[] = { Chain, Ptr, SV, getConstant(Count, MVT::i32), 1656 getValueType(EVT) }; 1657 return getNode(ISD::VLOAD, getVTList(MVT::Vector, MVT::Other), Ops, 5); 1658} 1659 1660SDOperand SelectionDAG::getStore(SDOperand Chain, SDOperand Val, 1661 SDOperand Ptr, const Value *SV, int SVOffset, 1662 bool isVolatile) { 1663 MVT::ValueType VT = Val.getValueType(); 1664 1665 // FIXME: Alignment == 1 for now. 1666 unsigned Alignment = 1; 1667 SDVTList VTs = getVTList(MVT::Other); 1668 SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType()); 1669 SDOperand Ops[] = { Chain, Val, Ptr, Undef }; 1670 FoldingSetNodeID ID; 1671 AddNodeIDNode(ID, ISD::STORE, VTs, Ops, 4); 1672 ID.AddInteger(ISD::UNINDEXED); 1673 ID.AddInteger(false); 1674 ID.AddInteger(VT); 1675 ID.AddPointer(SV); 1676 ID.AddInteger(SVOffset); 1677 ID.AddInteger(Alignment); 1678 ID.AddInteger(isVolatile); 1679 void *IP = 0; 1680 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1681 return SDOperand(E, 0); 1682 SDNode *N = new StoreSDNode(Chain, Val, Ptr, Undef, ISD::UNINDEXED, false, 1683 VT, SV, SVOffset, Alignment, isVolatile); 1684 N->setValueTypes(VTs); 1685 CSEMap.InsertNode(N, IP); 1686 AllNodes.push_back(N); 1687 return SDOperand(N, 0); 1688} 1689 1690SDOperand SelectionDAG::getTruncStore(SDOperand Chain, SDOperand Val, 1691 SDOperand Ptr, const Value *SV, 1692 int SVOffset, MVT::ValueType SVT, 1693 bool isVolatile) { 1694 MVT::ValueType VT = Val.getValueType(); 1695 bool isTrunc = VT != SVT; 1696 1697 assert(VT > SVT && "Not a truncation?"); 1698 assert(MVT::isInteger(VT) == MVT::isInteger(SVT) && 1699 "Can't do FP-INT conversion!"); 1700 1701 // FIXME: Alignment == 1 for now. 1702 unsigned Alignment = 1; 1703 SDVTList VTs = getVTList(MVT::Other); 1704 SDOperand Undef = getNode(ISD::UNDEF, Ptr.getValueType()); 1705 SDOperand Ops[] = { Chain, Val, Ptr, Undef }; 1706 FoldingSetNodeID ID; 1707 AddNodeIDNode(ID, ISD::STORE, VTs, Ops, 4); 1708 ID.AddInteger(ISD::UNINDEXED); 1709 ID.AddInteger(isTrunc); 1710 ID.AddInteger(SVT); 1711 ID.AddPointer(SV); 1712 ID.AddInteger(SVOffset); 1713 ID.AddInteger(Alignment); 1714 ID.AddInteger(isVolatile); 1715 void *IP = 0; 1716 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1717 return SDOperand(E, 0); 1718 SDNode *N = new StoreSDNode(Chain, Val, Ptr, Undef, ISD::UNINDEXED, isTrunc, 1719 SVT, SV, SVOffset, Alignment, isVolatile); 1720 N->setValueTypes(VTs); 1721 CSEMap.InsertNode(N, IP); 1722 AllNodes.push_back(N); 1723 return SDOperand(N, 0); 1724} 1725 1726SDOperand 1727SelectionDAG::getIndexedStore(SDOperand OrigStore, SDOperand Base, 1728 SDOperand Offset, ISD::MemIndexedMode AM) { 1729 StoreSDNode *ST = cast<StoreSDNode>(OrigStore); 1730 assert(ST->getOffset().getOpcode() == ISD::UNDEF && 1731 "Store is already a indexed store!"); 1732 SDVTList VTs = getVTList(Base.getValueType(), MVT::Other); 1733 SDOperand Ops[] = { ST->getChain(), ST->getValue(), Base, Offset }; 1734 FoldingSetNodeID ID; 1735 AddNodeIDNode(ID, ISD::STORE, VTs, Ops, 4); 1736 ID.AddInteger(AM); 1737 ID.AddInteger(ST->isTruncatingStore()); 1738 ID.AddInteger(ST->getStoredVT()); 1739 ID.AddPointer(ST->getSrcValue()); 1740 ID.AddInteger(ST->getSrcValueOffset()); 1741 ID.AddInteger(ST->getAlignment()); 1742 ID.AddInteger(ST->isVolatile()); 1743 void *IP = 0; 1744 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1745 return SDOperand(E, 0); 1746 SDNode *N = new StoreSDNode(ST->getChain(), ST->getValue(), 1747 Base, Offset, AM, 1748 ST->isTruncatingStore(), ST->getStoredVT(), 1749 ST->getSrcValue(), ST->getSrcValueOffset(), 1750 ST->getAlignment(), ST->isVolatile()); 1751 N->setValueTypes(VTs); 1752 CSEMap.InsertNode(N, IP); 1753 AllNodes.push_back(N); 1754 return SDOperand(N, 0); 1755} 1756 1757SDOperand SelectionDAG::getVAArg(MVT::ValueType VT, 1758 SDOperand Chain, SDOperand Ptr, 1759 SDOperand SV) { 1760 SDOperand Ops[] = { Chain, Ptr, SV }; 1761 return getNode(ISD::VAARG, getVTList(VT, MVT::Other), Ops, 3); 1762} 1763 1764SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 1765 const SDOperand *Ops, unsigned NumOps) { 1766 switch (NumOps) { 1767 case 0: return getNode(Opcode, VT); 1768 case 1: return getNode(Opcode, VT, Ops[0]); 1769 case 2: return getNode(Opcode, VT, Ops[0], Ops[1]); 1770 case 3: return getNode(Opcode, VT, Ops[0], Ops[1], Ops[2]); 1771 default: break; 1772 } 1773 1774 switch (Opcode) { 1775 default: break; 1776 case ISD::SELECT_CC: { 1777 assert(NumOps == 5 && "SELECT_CC takes 5 operands!"); 1778 assert(Ops[0].getValueType() == Ops[1].getValueType() && 1779 "LHS and RHS of condition must have same type!"); 1780 assert(Ops[2].getValueType() == Ops[3].getValueType() && 1781 "True and False arms of SelectCC must have same type!"); 1782 assert(Ops[2].getValueType() == VT && 1783 "select_cc node must be of same type as true and false value!"); 1784 break; 1785 } 1786 case ISD::BR_CC: { 1787 assert(NumOps == 5 && "BR_CC takes 5 operands!"); 1788 assert(Ops[2].getValueType() == Ops[3].getValueType() && 1789 "LHS/RHS of comparison should match types!"); 1790 break; 1791 } 1792 } 1793 1794 // Memoize nodes. 1795 SDNode *N; 1796 SDVTList VTs = getVTList(VT); 1797 if (VT != MVT::Flag) { 1798 FoldingSetNodeID ID; 1799 AddNodeIDNode(ID, Opcode, VTs, Ops, NumOps); 1800 void *IP = 0; 1801 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1802 return SDOperand(E, 0); 1803 N = new SDNode(Opcode, Ops, NumOps); 1804 N->setValueTypes(VTs); 1805 CSEMap.InsertNode(N, IP); 1806 } else { 1807 N = new SDNode(Opcode, Ops, NumOps); 1808 N->setValueTypes(VTs); 1809 } 1810 AllNodes.push_back(N); 1811 return SDOperand(N, 0); 1812} 1813 1814SDOperand SelectionDAG::getNode(unsigned Opcode, 1815 std::vector<MVT::ValueType> &ResultTys, 1816 const SDOperand *Ops, unsigned NumOps) { 1817 return getNode(Opcode, getNodeValueTypes(ResultTys), ResultTys.size(), 1818 Ops, NumOps); 1819} 1820 1821SDOperand SelectionDAG::getNode(unsigned Opcode, 1822 const MVT::ValueType *VTs, unsigned NumVTs, 1823 const SDOperand *Ops, unsigned NumOps) { 1824 if (NumVTs == 1) 1825 return getNode(Opcode, VTs[0], Ops, NumOps); 1826 return getNode(Opcode, makeVTList(VTs, NumVTs), Ops, NumOps); 1827} 1828 1829SDOperand SelectionDAG::getNode(unsigned Opcode, SDVTList VTList, 1830 const SDOperand *Ops, unsigned NumOps) { 1831 if (VTList.NumVTs == 1) 1832 return getNode(Opcode, VTList.VTs[0], Ops, NumOps); 1833 1834 switch (Opcode) { 1835 // FIXME: figure out how to safely handle things like 1836 // int foo(int x) { return 1 << (x & 255); } 1837 // int bar() { return foo(256); } 1838#if 0 1839 case ISD::SRA_PARTS: 1840 case ISD::SRL_PARTS: 1841 case ISD::SHL_PARTS: 1842 if (N3.getOpcode() == ISD::SIGN_EXTEND_INREG && 1843 cast<VTSDNode>(N3.getOperand(1))->getVT() != MVT::i1) 1844 return getNode(Opcode, VT, N1, N2, N3.getOperand(0)); 1845 else if (N3.getOpcode() == ISD::AND) 1846 if (ConstantSDNode *AndRHS = dyn_cast<ConstantSDNode>(N3.getOperand(1))) { 1847 // If the and is only masking out bits that cannot effect the shift, 1848 // eliminate the and. 1849 unsigned NumBits = MVT::getSizeInBits(VT)*2; 1850 if ((AndRHS->getValue() & (NumBits-1)) == NumBits-1) 1851 return getNode(Opcode, VT, N1, N2, N3.getOperand(0)); 1852 } 1853 break; 1854#endif 1855 } 1856 1857 // Memoize the node unless it returns a flag. 1858 SDNode *N; 1859 if (VTList.VTs[VTList.NumVTs-1] != MVT::Flag) { 1860 FoldingSetNodeID ID; 1861 AddNodeIDNode(ID, Opcode, VTList, Ops, NumOps); 1862 void *IP = 0; 1863 if (SDNode *E = CSEMap.FindNodeOrInsertPos(ID, IP)) 1864 return SDOperand(E, 0); 1865 N = new SDNode(Opcode, Ops, NumOps); 1866 N->setValueTypes(VTList); 1867 CSEMap.InsertNode(N, IP); 1868 } else { 1869 N = new SDNode(Opcode, Ops, NumOps); 1870 N->setValueTypes(VTList); 1871 } 1872 AllNodes.push_back(N); 1873 return SDOperand(N, 0); 1874} 1875 1876SDVTList SelectionDAG::getVTList(MVT::ValueType VT) { 1877 return makeVTList(SDNode::getValueTypeList(VT), 1); 1878} 1879 1880SDVTList SelectionDAG::getVTList(MVT::ValueType VT1, MVT::ValueType VT2) { 1881 for (std::list<std::vector<MVT::ValueType> >::iterator I = VTList.begin(), 1882 E = VTList.end(); I != E; ++I) { 1883 if (I->size() == 2 && (*I)[0] == VT1 && (*I)[1] == VT2) 1884 return makeVTList(&(*I)[0], 2); 1885 } 1886 std::vector<MVT::ValueType> V; 1887 V.push_back(VT1); 1888 V.push_back(VT2); 1889 VTList.push_front(V); 1890 return makeVTList(&(*VTList.begin())[0], 2); 1891} 1892SDVTList SelectionDAG::getVTList(MVT::ValueType VT1, MVT::ValueType VT2, 1893 MVT::ValueType VT3) { 1894 for (std::list<std::vector<MVT::ValueType> >::iterator I = VTList.begin(), 1895 E = VTList.end(); I != E; ++I) { 1896 if (I->size() == 3 && (*I)[0] == VT1 && (*I)[1] == VT2 && 1897 (*I)[2] == VT3) 1898 return makeVTList(&(*I)[0], 3); 1899 } 1900 std::vector<MVT::ValueType> V; 1901 V.push_back(VT1); 1902 V.push_back(VT2); 1903 V.push_back(VT3); 1904 VTList.push_front(V); 1905 return makeVTList(&(*VTList.begin())[0], 3); 1906} 1907 1908SDVTList SelectionDAG::getVTList(const MVT::ValueType *VTs, unsigned NumVTs) { 1909 switch (NumVTs) { 1910 case 0: assert(0 && "Cannot have nodes without results!"); 1911 case 1: return makeVTList(SDNode::getValueTypeList(VTs[0]), 1); 1912 case 2: return getVTList(VTs[0], VTs[1]); 1913 case 3: return getVTList(VTs[0], VTs[1], VTs[2]); 1914 default: break; 1915 } 1916 1917 for (std::list<std::vector<MVT::ValueType> >::iterator I = VTList.begin(), 1918 E = VTList.end(); I != E; ++I) { 1919 if (I->size() != NumVTs || VTs[0] != (*I)[0] || VTs[1] != (*I)[1]) continue; 1920 1921 bool NoMatch = false; 1922 for (unsigned i = 2; i != NumVTs; ++i) 1923 if (VTs[i] != (*I)[i]) { 1924 NoMatch = true; 1925 break; 1926 } 1927 if (!NoMatch) 1928 return makeVTList(&*I->begin(), NumVTs); 1929 } 1930 1931 VTList.push_front(std::vector<MVT::ValueType>(VTs, VTs+NumVTs)); 1932 return makeVTList(&*VTList.begin()->begin(), NumVTs); 1933} 1934 1935 1936/// UpdateNodeOperands - *Mutate* the specified node in-place to have the 1937/// specified operands. If the resultant node already exists in the DAG, 1938/// this does not modify the specified node, instead it returns the node that 1939/// already exists. If the resultant node does not exist in the DAG, the 1940/// input node is returned. As a degenerate case, if you specify the same 1941/// input operands as the node already has, the input node is returned. 1942SDOperand SelectionDAG:: 1943UpdateNodeOperands(SDOperand InN, SDOperand Op) { 1944 SDNode *N = InN.Val; 1945 assert(N->getNumOperands() == 1 && "Update with wrong number of operands"); 1946 1947 // Check to see if there is no change. 1948 if (Op == N->getOperand(0)) return InN; 1949 1950 // See if the modified node already exists. 1951 void *InsertPos = 0; 1952 if (SDNode *Existing = FindModifiedNodeSlot(N, Op, InsertPos)) 1953 return SDOperand(Existing, InN.ResNo); 1954 1955 // Nope it doesn't. Remove the node from it's current place in the maps. 1956 if (InsertPos) 1957 RemoveNodeFromCSEMaps(N); 1958 1959 // Now we update the operands. 1960 N->OperandList[0].Val->removeUser(N); 1961 Op.Val->addUser(N); 1962 N->OperandList[0] = Op; 1963 1964 // If this gets put into a CSE map, add it. 1965 if (InsertPos) CSEMap.InsertNode(N, InsertPos); 1966 return InN; 1967} 1968 1969SDOperand SelectionDAG:: 1970UpdateNodeOperands(SDOperand InN, SDOperand Op1, SDOperand Op2) { 1971 SDNode *N = InN.Val; 1972 assert(N->getNumOperands() == 2 && "Update with wrong number of operands"); 1973 1974 // Check to see if there is no change. 1975 if (Op1 == N->getOperand(0) && Op2 == N->getOperand(1)) 1976 return InN; // No operands changed, just return the input node. 1977 1978 // See if the modified node already exists. 1979 void *InsertPos = 0; 1980 if (SDNode *Existing = FindModifiedNodeSlot(N, Op1, Op2, InsertPos)) 1981 return SDOperand(Existing, InN.ResNo); 1982 1983 // Nope it doesn't. Remove the node from it's current place in the maps. 1984 if (InsertPos) 1985 RemoveNodeFromCSEMaps(N); 1986 1987 // Now we update the operands. 1988 if (N->OperandList[0] != Op1) { 1989 N->OperandList[0].Val->removeUser(N); 1990 Op1.Val->addUser(N); 1991 N->OperandList[0] = Op1; 1992 } 1993 if (N->OperandList[1] != Op2) { 1994 N->OperandList[1].Val->removeUser(N); 1995 Op2.Val->addUser(N); 1996 N->OperandList[1] = Op2; 1997 } 1998 1999 // If this gets put into a CSE map, add it. 2000 if (InsertPos) CSEMap.InsertNode(N, InsertPos); 2001 return InN; 2002} 2003 2004SDOperand SelectionDAG:: 2005UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, SDOperand Op3) { 2006 SDOperand Ops[] = { Op1, Op2, Op3 }; 2007 return UpdateNodeOperands(N, Ops, 3); 2008} 2009 2010SDOperand SelectionDAG:: 2011UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, 2012 SDOperand Op3, SDOperand Op4) { 2013 SDOperand Ops[] = { Op1, Op2, Op3, Op4 }; 2014 return UpdateNodeOperands(N, Ops, 4); 2015} 2016 2017SDOperand SelectionDAG:: 2018UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, 2019 SDOperand Op3, SDOperand Op4, SDOperand Op5) { 2020 SDOperand Ops[] = { Op1, Op2, Op3, Op4, Op5 }; 2021 return UpdateNodeOperands(N, Ops, 5); 2022} 2023 2024 2025SDOperand SelectionDAG:: 2026UpdateNodeOperands(SDOperand InN, SDOperand *Ops, unsigned NumOps) { 2027 SDNode *N = InN.Val; 2028 assert(N->getNumOperands() == NumOps && 2029 "Update with wrong number of operands"); 2030 2031 // Check to see if there is no change. 2032 bool AnyChange = false; 2033 for (unsigned i = 0; i != NumOps; ++i) { 2034 if (Ops[i] != N->getOperand(i)) { 2035 AnyChange = true; 2036 break; 2037 } 2038 } 2039 2040 // No operands changed, just return the input node. 2041 if (!AnyChange) return InN; 2042 2043 // See if the modified node already exists. 2044 void *InsertPos = 0; 2045 if (SDNode *Existing = FindModifiedNodeSlot(N, Ops, NumOps, InsertPos)) 2046 return SDOperand(Existing, InN.ResNo); 2047 2048 // Nope it doesn't. Remove the node from it's current place in the maps. 2049 if (InsertPos) 2050 RemoveNodeFromCSEMaps(N); 2051 2052 // Now we update the operands. 2053 for (unsigned i = 0; i != NumOps; ++i) { 2054 if (N->OperandList[i] != Ops[i]) { 2055 N->OperandList[i].Val->removeUser(N); 2056 Ops[i].Val->addUser(N); 2057 N->OperandList[i] = Ops[i]; 2058 } 2059 } 2060 2061 // If this gets put into a CSE map, add it. 2062 if (InsertPos) CSEMap.InsertNode(N, InsertPos); 2063 return InN; 2064} 2065 2066 2067 2068 2069/// SelectNodeTo - These are used for target selectors to *mutate* the 2070/// specified node to have the specified return type, Target opcode, and 2071/// operands. Note that target opcodes are stored as 2072/// ISD::BUILTIN_OP_END+TargetOpcode in the node opcode field. 2073/// 2074/// Note that SelectNodeTo returns the resultant node. If there is already a 2075/// node of the specified opcode and operands, it returns that node instead of 2076/// the current one. 2077SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 2078 MVT::ValueType VT) { 2079 SDVTList VTs = getVTList(VT); 2080 FoldingSetNodeID ID; 2081 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs); 2082 void *IP = 0; 2083 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP)) 2084 return ON; 2085 2086 RemoveNodeFromCSEMaps(N); 2087 2088 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2089 N->setValueTypes(VTs); 2090 2091 CSEMap.InsertNode(N, IP); 2092 return N; 2093} 2094 2095SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 2096 MVT::ValueType VT, SDOperand Op1) { 2097 // If an identical node already exists, use it. 2098 SDVTList VTs = getVTList(VT); 2099 FoldingSetNodeID ID; 2100 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Op1); 2101 void *IP = 0; 2102 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP)) 2103 return ON; 2104 2105 RemoveNodeFromCSEMaps(N); 2106 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2107 N->setValueTypes(VTs); 2108 N->setOperands(Op1); 2109 CSEMap.InsertNode(N, IP); 2110 return N; 2111} 2112 2113SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 2114 MVT::ValueType VT, SDOperand Op1, 2115 SDOperand Op2) { 2116 // If an identical node already exists, use it. 2117 SDVTList VTs = getVTList(VT); 2118 FoldingSetNodeID ID; 2119 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Op1, Op2); 2120 void *IP = 0; 2121 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP)) 2122 return ON; 2123 2124 RemoveNodeFromCSEMaps(N); 2125 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2126 N->setValueTypes(VTs); 2127 N->setOperands(Op1, Op2); 2128 2129 CSEMap.InsertNode(N, IP); // Memoize the new node. 2130 return N; 2131} 2132 2133SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 2134 MVT::ValueType VT, SDOperand Op1, 2135 SDOperand Op2, SDOperand Op3) { 2136 // If an identical node already exists, use it. 2137 SDVTList VTs = getVTList(VT); 2138 FoldingSetNodeID ID; 2139 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Op1, Op2, Op3); 2140 void *IP = 0; 2141 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP)) 2142 return ON; 2143 2144 RemoveNodeFromCSEMaps(N); 2145 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2146 N->setValueTypes(VTs); 2147 N->setOperands(Op1, Op2, Op3); 2148 2149 CSEMap.InsertNode(N, IP); // Memoize the new node. 2150 return N; 2151} 2152 2153SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 2154 MVT::ValueType VT, const SDOperand *Ops, 2155 unsigned NumOps) { 2156 // If an identical node already exists, use it. 2157 SDVTList VTs = getVTList(VT); 2158 FoldingSetNodeID ID; 2159 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Ops, NumOps); 2160 void *IP = 0; 2161 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP)) 2162 return ON; 2163 2164 RemoveNodeFromCSEMaps(N); 2165 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2166 N->setValueTypes(VTs); 2167 N->setOperands(Ops, NumOps); 2168 2169 CSEMap.InsertNode(N, IP); // Memoize the new node. 2170 return N; 2171} 2172 2173SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 2174 MVT::ValueType VT1, MVT::ValueType VT2, 2175 SDOperand Op1, SDOperand Op2) { 2176 SDVTList VTs = getVTList(VT1, VT2); 2177 FoldingSetNodeID ID; 2178 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Op1, Op2); 2179 void *IP = 0; 2180 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP)) 2181 return ON; 2182 2183 RemoveNodeFromCSEMaps(N); 2184 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2185 N->setValueTypes(VTs); 2186 N->setOperands(Op1, Op2); 2187 2188 CSEMap.InsertNode(N, IP); // Memoize the new node. 2189 return N; 2190} 2191 2192SDNode *SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 2193 MVT::ValueType VT1, MVT::ValueType VT2, 2194 SDOperand Op1, SDOperand Op2, 2195 SDOperand Op3) { 2196 // If an identical node already exists, use it. 2197 SDVTList VTs = getVTList(VT1, VT2); 2198 FoldingSetNodeID ID; 2199 AddNodeIDNode(ID, ISD::BUILTIN_OP_END+TargetOpc, VTs, Op1, Op2, Op3); 2200 void *IP = 0; 2201 if (SDNode *ON = CSEMap.FindNodeOrInsertPos(ID, IP)) 2202 return ON; 2203 2204 RemoveNodeFromCSEMaps(N); 2205 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2206 N->setValueTypes(VTs); 2207 N->setOperands(Op1, Op2, Op3); 2208 2209 CSEMap.InsertNode(N, IP); // Memoize the new node. 2210 return N; 2211} 2212 2213 2214/// getTargetNode - These are used for target selectors to create a new node 2215/// with specified return type(s), target opcode, and operands. 2216/// 2217/// Note that getTargetNode returns the resultant node. If there is already a 2218/// node of the specified opcode and operands, it returns that node instead of 2219/// the current one. 2220SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT) { 2221 return getNode(ISD::BUILTIN_OP_END+Opcode, VT).Val; 2222} 2223SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2224 SDOperand Op1) { 2225 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1).Val; 2226} 2227SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2228 SDOperand Op1, SDOperand Op2) { 2229 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2).Val; 2230} 2231SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2232 SDOperand Op1, SDOperand Op2, 2233 SDOperand Op3) { 2234 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3).Val; 2235} 2236SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2237 const SDOperand *Ops, unsigned NumOps) { 2238 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops, NumOps).Val; 2239} 2240SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2241 MVT::ValueType VT2, SDOperand Op1) { 2242 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2); 2243 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, &Op1, 1).Val; 2244} 2245SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2246 MVT::ValueType VT2, SDOperand Op1, 2247 SDOperand Op2) { 2248 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2); 2249 SDOperand Ops[] = { Op1, Op2 }; 2250 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, Ops, 2).Val; 2251} 2252SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2253 MVT::ValueType VT2, SDOperand Op1, 2254 SDOperand Op2, SDOperand Op3) { 2255 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2); 2256 SDOperand Ops[] = { Op1, Op2, Op3 }; 2257 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, Ops, 3).Val; 2258} 2259SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2260 MVT::ValueType VT2, 2261 const SDOperand *Ops, unsigned NumOps) { 2262 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2); 2263 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 2, Ops, NumOps).Val; 2264} 2265SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2266 MVT::ValueType VT2, MVT::ValueType VT3, 2267 SDOperand Op1, SDOperand Op2) { 2268 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2, VT3); 2269 SDOperand Ops[] = { Op1, Op2 }; 2270 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 3, Ops, 2).Val; 2271} 2272SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2273 MVT::ValueType VT2, MVT::ValueType VT3, 2274 const SDOperand *Ops, unsigned NumOps) { 2275 const MVT::ValueType *VTs = getNodeValueTypes(VT1, VT2, VT3); 2276 return getNode(ISD::BUILTIN_OP_END+Opcode, VTs, 3, Ops, NumOps).Val; 2277} 2278 2279/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead. 2280/// This can cause recursive merging of nodes in the DAG. 2281/// 2282/// This version assumes From/To have a single result value. 2283/// 2284void SelectionDAG::ReplaceAllUsesWith(SDOperand FromN, SDOperand ToN, 2285 std::vector<SDNode*> *Deleted) { 2286 SDNode *From = FromN.Val, *To = ToN.Val; 2287 assert(From->getNumValues() == 1 && To->getNumValues() == 1 && 2288 "Cannot replace with this method!"); 2289 assert(From != To && "Cannot replace uses of with self"); 2290 2291 while (!From->use_empty()) { 2292 // Process users until they are all gone. 2293 SDNode *U = *From->use_begin(); 2294 2295 // This node is about to morph, remove its old self from the CSE maps. 2296 RemoveNodeFromCSEMaps(U); 2297 2298 for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands; 2299 I != E; ++I) 2300 if (I->Val == From) { 2301 From->removeUser(U); 2302 I->Val = To; 2303 To->addUser(U); 2304 } 2305 2306 // Now that we have modified U, add it back to the CSE maps. If it already 2307 // exists there, recursively merge the results together. 2308 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) { 2309 ReplaceAllUsesWith(U, Existing, Deleted); 2310 // U is now dead. 2311 if (Deleted) Deleted->push_back(U); 2312 DeleteNodeNotInCSEMaps(U); 2313 } 2314 } 2315} 2316 2317/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead. 2318/// This can cause recursive merging of nodes in the DAG. 2319/// 2320/// This version assumes From/To have matching types and numbers of result 2321/// values. 2322/// 2323void SelectionDAG::ReplaceAllUsesWith(SDNode *From, SDNode *To, 2324 std::vector<SDNode*> *Deleted) { 2325 assert(From != To && "Cannot replace uses of with self"); 2326 assert(From->getNumValues() == To->getNumValues() && 2327 "Cannot use this version of ReplaceAllUsesWith!"); 2328 if (From->getNumValues() == 1) { // If possible, use the faster version. 2329 ReplaceAllUsesWith(SDOperand(From, 0), SDOperand(To, 0), Deleted); 2330 return; 2331 } 2332 2333 while (!From->use_empty()) { 2334 // Process users until they are all gone. 2335 SDNode *U = *From->use_begin(); 2336 2337 // This node is about to morph, remove its old self from the CSE maps. 2338 RemoveNodeFromCSEMaps(U); 2339 2340 for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands; 2341 I != E; ++I) 2342 if (I->Val == From) { 2343 From->removeUser(U); 2344 I->Val = To; 2345 To->addUser(U); 2346 } 2347 2348 // Now that we have modified U, add it back to the CSE maps. If it already 2349 // exists there, recursively merge the results together. 2350 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) { 2351 ReplaceAllUsesWith(U, Existing, Deleted); 2352 // U is now dead. 2353 if (Deleted) Deleted->push_back(U); 2354 DeleteNodeNotInCSEMaps(U); 2355 } 2356 } 2357} 2358 2359/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead. 2360/// This can cause recursive merging of nodes in the DAG. 2361/// 2362/// This version can replace From with any result values. To must match the 2363/// number and types of values returned by From. 2364void SelectionDAG::ReplaceAllUsesWith(SDNode *From, 2365 const SDOperand *To, 2366 std::vector<SDNode*> *Deleted) { 2367 if (From->getNumValues() == 1 && To[0].Val->getNumValues() == 1) { 2368 // Degenerate case handled above. 2369 ReplaceAllUsesWith(SDOperand(From, 0), To[0], Deleted); 2370 return; 2371 } 2372 2373 while (!From->use_empty()) { 2374 // Process users until they are all gone. 2375 SDNode *U = *From->use_begin(); 2376 2377 // This node is about to morph, remove its old self from the CSE maps. 2378 RemoveNodeFromCSEMaps(U); 2379 2380 for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands; 2381 I != E; ++I) 2382 if (I->Val == From) { 2383 const SDOperand &ToOp = To[I->ResNo]; 2384 From->removeUser(U); 2385 *I = ToOp; 2386 ToOp.Val->addUser(U); 2387 } 2388 2389 // Now that we have modified U, add it back to the CSE maps. If it already 2390 // exists there, recursively merge the results together. 2391 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) { 2392 ReplaceAllUsesWith(U, Existing, Deleted); 2393 // U is now dead. 2394 if (Deleted) Deleted->push_back(U); 2395 DeleteNodeNotInCSEMaps(U); 2396 } 2397 } 2398} 2399 2400/// ReplaceAllUsesOfValueWith - Replace any uses of From with To, leaving 2401/// uses of other values produced by From.Val alone. The Deleted vector is 2402/// handled the same was as for ReplaceAllUsesWith. 2403void SelectionDAG::ReplaceAllUsesOfValueWith(SDOperand From, SDOperand To, 2404 std::vector<SDNode*> &Deleted) { 2405 assert(From != To && "Cannot replace a value with itself"); 2406 // Handle the simple, trivial, case efficiently. 2407 if (From.Val->getNumValues() == 1 && To.Val->getNumValues() == 1) { 2408 ReplaceAllUsesWith(From, To, &Deleted); 2409 return; 2410 } 2411 2412 // Get all of the users of From.Val. We want these in a nice, 2413 // deterministically ordered and uniqued set, so we use a SmallSetVector. 2414 SmallSetVector<SDNode*, 16> Users(From.Val->use_begin(), From.Val->use_end()); 2415 2416 while (!Users.empty()) { 2417 // We know that this user uses some value of From. If it is the right 2418 // value, update it. 2419 SDNode *User = Users.back(); 2420 Users.pop_back(); 2421 2422 for (SDOperand *Op = User->OperandList, 2423 *E = User->OperandList+User->NumOperands; Op != E; ++Op) { 2424 if (*Op == From) { 2425 // Okay, we know this user needs to be updated. Remove its old self 2426 // from the CSE maps. 2427 RemoveNodeFromCSEMaps(User); 2428 2429 // Update all operands that match "From". 2430 for (; Op != E; ++Op) { 2431 if (*Op == From) { 2432 From.Val->removeUser(User); 2433 *Op = To; 2434 To.Val->addUser(User); 2435 } 2436 } 2437 2438 // Now that we have modified User, add it back to the CSE maps. If it 2439 // already exists there, recursively merge the results together. 2440 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(User)) { 2441 unsigned NumDeleted = Deleted.size(); 2442 ReplaceAllUsesWith(User, Existing, &Deleted); 2443 2444 // User is now dead. 2445 Deleted.push_back(User); 2446 DeleteNodeNotInCSEMaps(User); 2447 2448 // We have to be careful here, because ReplaceAllUsesWith could have 2449 // deleted a user of From, which means there may be dangling pointers 2450 // in the "Users" setvector. Scan over the deleted node pointers and 2451 // remove them from the setvector. 2452 for (unsigned i = NumDeleted, e = Deleted.size(); i != e; ++i) 2453 Users.remove(Deleted[i]); 2454 } 2455 break; // Exit the operand scanning loop. 2456 } 2457 } 2458 } 2459} 2460 2461 2462/// AssignNodeIds - Assign a unique node id for each node in the DAG based on 2463/// their allnodes order. It returns the maximum id. 2464unsigned SelectionDAG::AssignNodeIds() { 2465 unsigned Id = 0; 2466 for (allnodes_iterator I = allnodes_begin(), E = allnodes_end(); I != E; ++I){ 2467 SDNode *N = I; 2468 N->setNodeId(Id++); 2469 } 2470 return Id; 2471} 2472 2473/// AssignTopologicalOrder - Assign a unique node id for each node in the DAG 2474/// based on their topological order. It returns the maximum id and a vector 2475/// of the SDNodes* in assigned order by reference. 2476unsigned SelectionDAG::AssignTopologicalOrder(std::vector<SDNode*> &TopOrder) { 2477 unsigned DAGSize = AllNodes.size(); 2478 std::vector<unsigned> InDegree(DAGSize); 2479 std::vector<SDNode*> Sources; 2480 2481 // Use a two pass approach to avoid using a std::map which is slow. 2482 unsigned Id = 0; 2483 for (allnodes_iterator I = allnodes_begin(),E = allnodes_end(); I != E; ++I){ 2484 SDNode *N = I; 2485 N->setNodeId(Id++); 2486 unsigned Degree = N->use_size(); 2487 InDegree[N->getNodeId()] = Degree; 2488 if (Degree == 0) 2489 Sources.push_back(N); 2490 } 2491 2492 TopOrder.clear(); 2493 while (!Sources.empty()) { 2494 SDNode *N = Sources.back(); 2495 Sources.pop_back(); 2496 TopOrder.push_back(N); 2497 for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) { 2498 SDNode *P = I->Val; 2499 unsigned Degree = --InDegree[P->getNodeId()]; 2500 if (Degree == 0) 2501 Sources.push_back(P); 2502 } 2503 } 2504 2505 // Second pass, assign the actual topological order as node ids. 2506 Id = 0; 2507 for (std::vector<SDNode*>::iterator TI = TopOrder.begin(),TE = TopOrder.end(); 2508 TI != TE; ++TI) 2509 (*TI)->setNodeId(Id++); 2510 2511 return Id; 2512} 2513 2514 2515 2516//===----------------------------------------------------------------------===// 2517// SDNode Class 2518//===----------------------------------------------------------------------===// 2519 2520// Out-of-line virtual method to give class a home. 2521void SDNode::ANCHOR() { 2522} 2523 2524/// Profile - Gather unique data for the node. 2525/// 2526void SDNode::Profile(FoldingSetNodeID &ID) { 2527 AddNodeIDNode(ID, this); 2528} 2529 2530/// getValueTypeList - Return a pointer to the specified value type. 2531/// 2532MVT::ValueType *SDNode::getValueTypeList(MVT::ValueType VT) { 2533 static MVT::ValueType VTs[MVT::LAST_VALUETYPE]; 2534 VTs[VT] = VT; 2535 return &VTs[VT]; 2536} 2537 2538/// hasNUsesOfValue - Return true if there are exactly NUSES uses of the 2539/// indicated value. This method ignores uses of other values defined by this 2540/// operation. 2541bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) const { 2542 assert(Value < getNumValues() && "Bad value!"); 2543 2544 // If there is only one value, this is easy. 2545 if (getNumValues() == 1) 2546 return use_size() == NUses; 2547 if (Uses.size() < NUses) return false; 2548 2549 SDOperand TheValue(const_cast<SDNode *>(this), Value); 2550 2551 std::set<SDNode*> UsersHandled; 2552 2553 for (SDNode::use_iterator UI = Uses.begin(), E = Uses.end(); UI != E; ++UI) { 2554 SDNode *User = *UI; 2555 if (User->getNumOperands() == 1 || 2556 UsersHandled.insert(User).second) // First time we've seen this? 2557 for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i) 2558 if (User->getOperand(i) == TheValue) { 2559 if (NUses == 0) 2560 return false; // too many uses 2561 --NUses; 2562 } 2563 } 2564 2565 // Found exactly the right number of uses? 2566 return NUses == 0; 2567} 2568 2569 2570/// isOnlyUse - Return true if this node is the only use of N. 2571/// 2572bool SDNode::isOnlyUse(SDNode *N) const { 2573 bool Seen = false; 2574 for (SDNode::use_iterator I = N->use_begin(), E = N->use_end(); I != E; ++I) { 2575 SDNode *User = *I; 2576 if (User == this) 2577 Seen = true; 2578 else 2579 return false; 2580 } 2581 2582 return Seen; 2583} 2584 2585/// isOperand - Return true if this node is an operand of N. 2586/// 2587bool SDOperand::isOperand(SDNode *N) const { 2588 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) 2589 if (*this == N->getOperand(i)) 2590 return true; 2591 return false; 2592} 2593 2594bool SDNode::isOperand(SDNode *N) const { 2595 for (unsigned i = 0, e = N->NumOperands; i != e; ++i) 2596 if (this == N->OperandList[i].Val) 2597 return true; 2598 return false; 2599} 2600 2601static void findPredecessor(SDNode *N, const SDNode *P, bool &found, 2602 std::set<SDNode *> &Visited) { 2603 if (found || !Visited.insert(N).second) 2604 return; 2605 2606 for (unsigned i = 0, e = N->getNumOperands(); !found && i != e; ++i) { 2607 SDNode *Op = N->getOperand(i).Val; 2608 if (Op == P) { 2609 found = true; 2610 return; 2611 } 2612 findPredecessor(Op, P, found, Visited); 2613 } 2614} 2615 2616/// isPredecessor - Return true if this node is a predecessor of N. This node 2617/// is either an operand of N or it can be reached by recursively traversing 2618/// up the operands. 2619/// NOTE: this is an expensive method. Use it carefully. 2620bool SDNode::isPredecessor(SDNode *N) const { 2621 std::set<SDNode *> Visited; 2622 bool found = false; 2623 findPredecessor(N, this, found, Visited); 2624 return found; 2625} 2626 2627uint64_t SDNode::getConstantOperandVal(unsigned Num) const { 2628 assert(Num < NumOperands && "Invalid child # of SDNode!"); 2629 return cast<ConstantSDNode>(OperandList[Num])->getValue(); 2630} 2631 2632const char *SDNode::getOperationName(const SelectionDAG *G) const { 2633 switch (getOpcode()) { 2634 default: 2635 if (getOpcode() < ISD::BUILTIN_OP_END) 2636 return "<<Unknown DAG Node>>"; 2637 else { 2638 if (G) { 2639 if (const TargetInstrInfo *TII = G->getTarget().getInstrInfo()) 2640 if (getOpcode()-ISD::BUILTIN_OP_END < TII->getNumOpcodes()) 2641 return TII->getName(getOpcode()-ISD::BUILTIN_OP_END); 2642 2643 TargetLowering &TLI = G->getTargetLoweringInfo(); 2644 const char *Name = 2645 TLI.getTargetNodeName(getOpcode()); 2646 if (Name) return Name; 2647 } 2648 2649 return "<<Unknown Target Node>>"; 2650 } 2651 2652 case ISD::PCMARKER: return "PCMarker"; 2653 case ISD::READCYCLECOUNTER: return "ReadCycleCounter"; 2654 case ISD::SRCVALUE: return "SrcValue"; 2655 case ISD::EntryToken: return "EntryToken"; 2656 case ISD::TokenFactor: return "TokenFactor"; 2657 case ISD::AssertSext: return "AssertSext"; 2658 case ISD::AssertZext: return "AssertZext"; 2659 2660 case ISD::STRING: return "String"; 2661 case ISD::BasicBlock: return "BasicBlock"; 2662 case ISD::VALUETYPE: return "ValueType"; 2663 case ISD::Register: return "Register"; 2664 2665 case ISD::Constant: return "Constant"; 2666 case ISD::ConstantFP: return "ConstantFP"; 2667 case ISD::GlobalAddress: return "GlobalAddress"; 2668 case ISD::FrameIndex: return "FrameIndex"; 2669 case ISD::JumpTable: return "JumpTable"; 2670 case ISD::GLOBAL_OFFSET_TABLE: return "GLOBAL_OFFSET_TABLE"; 2671 case ISD::RETURNADDR: return "RETURNADDR"; 2672 case ISD::FRAMEADDR: return "FRAMEADDR"; 2673 case ISD::ConstantPool: return "ConstantPool"; 2674 case ISD::ExternalSymbol: return "ExternalSymbol"; 2675 case ISD::INTRINSIC_WO_CHAIN: { 2676 unsigned IID = cast<ConstantSDNode>(getOperand(0))->getValue(); 2677 return Intrinsic::getName((Intrinsic::ID)IID); 2678 } 2679 case ISD::INTRINSIC_VOID: 2680 case ISD::INTRINSIC_W_CHAIN: { 2681 unsigned IID = cast<ConstantSDNode>(getOperand(1))->getValue(); 2682 return Intrinsic::getName((Intrinsic::ID)IID); 2683 } 2684 2685 case ISD::BUILD_VECTOR: return "BUILD_VECTOR"; 2686 case ISD::TargetConstant: return "TargetConstant"; 2687 case ISD::TargetConstantFP:return "TargetConstantFP"; 2688 case ISD::TargetGlobalAddress: return "TargetGlobalAddress"; 2689 case ISD::TargetFrameIndex: return "TargetFrameIndex"; 2690 case ISD::TargetJumpTable: return "TargetJumpTable"; 2691 case ISD::TargetConstantPool: return "TargetConstantPool"; 2692 case ISD::TargetExternalSymbol: return "TargetExternalSymbol"; 2693 2694 case ISD::CopyToReg: return "CopyToReg"; 2695 case ISD::CopyFromReg: return "CopyFromReg"; 2696 case ISD::UNDEF: return "undef"; 2697 case ISD::MERGE_VALUES: return "mergevalues"; 2698 case ISD::INLINEASM: return "inlineasm"; 2699 case ISD::LABEL: return "label"; 2700 case ISD::HANDLENODE: return "handlenode"; 2701 case ISD::FORMAL_ARGUMENTS: return "formal_arguments"; 2702 case ISD::CALL: return "call"; 2703 2704 // Unary operators 2705 case ISD::FABS: return "fabs"; 2706 case ISD::FNEG: return "fneg"; 2707 case ISD::FSQRT: return "fsqrt"; 2708 case ISD::FSIN: return "fsin"; 2709 case ISD::FCOS: return "fcos"; 2710 case ISD::FPOWI: return "fpowi"; 2711 2712 // Binary operators 2713 case ISD::ADD: return "add"; 2714 case ISD::SUB: return "sub"; 2715 case ISD::MUL: return "mul"; 2716 case ISD::MULHU: return "mulhu"; 2717 case ISD::MULHS: return "mulhs"; 2718 case ISD::SDIV: return "sdiv"; 2719 case ISD::UDIV: return "udiv"; 2720 case ISD::SREM: return "srem"; 2721 case ISD::UREM: return "urem"; 2722 case ISD::AND: return "and"; 2723 case ISD::OR: return "or"; 2724 case ISD::XOR: return "xor"; 2725 case ISD::SHL: return "shl"; 2726 case ISD::SRA: return "sra"; 2727 case ISD::SRL: return "srl"; 2728 case ISD::ROTL: return "rotl"; 2729 case ISD::ROTR: return "rotr"; 2730 case ISD::FADD: return "fadd"; 2731 case ISD::FSUB: return "fsub"; 2732 case ISD::FMUL: return "fmul"; 2733 case ISD::FDIV: return "fdiv"; 2734 case ISD::FREM: return "frem"; 2735 case ISD::FCOPYSIGN: return "fcopysign"; 2736 case ISD::VADD: return "vadd"; 2737 case ISD::VSUB: return "vsub"; 2738 case ISD::VMUL: return "vmul"; 2739 case ISD::VSDIV: return "vsdiv"; 2740 case ISD::VUDIV: return "vudiv"; 2741 case ISD::VAND: return "vand"; 2742 case ISD::VOR: return "vor"; 2743 case ISD::VXOR: return "vxor"; 2744 2745 case ISD::SETCC: return "setcc"; 2746 case ISD::SELECT: return "select"; 2747 case ISD::SELECT_CC: return "select_cc"; 2748 case ISD::VSELECT: return "vselect"; 2749 case ISD::INSERT_VECTOR_ELT: return "insert_vector_elt"; 2750 case ISD::VINSERT_VECTOR_ELT: return "vinsert_vector_elt"; 2751 case ISD::EXTRACT_VECTOR_ELT: return "extract_vector_elt"; 2752 case ISD::VEXTRACT_VECTOR_ELT: return "vextract_vector_elt"; 2753 case ISD::SCALAR_TO_VECTOR: return "scalar_to_vector"; 2754 case ISD::VBUILD_VECTOR: return "vbuild_vector"; 2755 case ISD::VECTOR_SHUFFLE: return "vector_shuffle"; 2756 case ISD::VVECTOR_SHUFFLE: return "vvector_shuffle"; 2757 case ISD::VBIT_CONVERT: return "vbit_convert"; 2758 case ISD::ADDC: return "addc"; 2759 case ISD::ADDE: return "adde"; 2760 case ISD::SUBC: return "subc"; 2761 case ISD::SUBE: return "sube"; 2762 case ISD::SHL_PARTS: return "shl_parts"; 2763 case ISD::SRA_PARTS: return "sra_parts"; 2764 case ISD::SRL_PARTS: return "srl_parts"; 2765 2766 // Conversion operators. 2767 case ISD::SIGN_EXTEND: return "sign_extend"; 2768 case ISD::ZERO_EXTEND: return "zero_extend"; 2769 case ISD::ANY_EXTEND: return "any_extend"; 2770 case ISD::SIGN_EXTEND_INREG: return "sign_extend_inreg"; 2771 case ISD::TRUNCATE: return "truncate"; 2772 case ISD::FP_ROUND: return "fp_round"; 2773 case ISD::FP_ROUND_INREG: return "fp_round_inreg"; 2774 case ISD::FP_EXTEND: return "fp_extend"; 2775 2776 case ISD::SINT_TO_FP: return "sint_to_fp"; 2777 case ISD::UINT_TO_FP: return "uint_to_fp"; 2778 case ISD::FP_TO_SINT: return "fp_to_sint"; 2779 case ISD::FP_TO_UINT: return "fp_to_uint"; 2780 case ISD::BIT_CONVERT: return "bit_convert"; 2781 2782 // Control flow instructions 2783 case ISD::BR: return "br"; 2784 case ISD::BRIND: return "brind"; 2785 case ISD::BR_JT: return "br_jt"; 2786 case ISD::BRCOND: return "brcond"; 2787 case ISD::BR_CC: return "br_cc"; 2788 case ISD::RET: return "ret"; 2789 case ISD::CALLSEQ_START: return "callseq_start"; 2790 case ISD::CALLSEQ_END: return "callseq_end"; 2791 2792 // Other operators 2793 case ISD::LOAD: return "load"; 2794 case ISD::STORE: return "store"; 2795 case ISD::VLOAD: return "vload"; 2796 case ISD::VAARG: return "vaarg"; 2797 case ISD::VACOPY: return "vacopy"; 2798 case ISD::VAEND: return "vaend"; 2799 case ISD::VASTART: return "vastart"; 2800 case ISD::DYNAMIC_STACKALLOC: return "dynamic_stackalloc"; 2801 case ISD::EXTRACT_ELEMENT: return "extract_element"; 2802 case ISD::BUILD_PAIR: return "build_pair"; 2803 case ISD::STACKSAVE: return "stacksave"; 2804 case ISD::STACKRESTORE: return "stackrestore"; 2805 2806 // Block memory operations. 2807 case ISD::MEMSET: return "memset"; 2808 case ISD::MEMCPY: return "memcpy"; 2809 case ISD::MEMMOVE: return "memmove"; 2810 2811 // Bit manipulation 2812 case ISD::BSWAP: return "bswap"; 2813 case ISD::CTPOP: return "ctpop"; 2814 case ISD::CTTZ: return "cttz"; 2815 case ISD::CTLZ: return "ctlz"; 2816 2817 // Debug info 2818 case ISD::LOCATION: return "location"; 2819 case ISD::DEBUG_LOC: return "debug_loc"; 2820 2821 case ISD::CONDCODE: 2822 switch (cast<CondCodeSDNode>(this)->get()) { 2823 default: assert(0 && "Unknown setcc condition!"); 2824 case ISD::SETOEQ: return "setoeq"; 2825 case ISD::SETOGT: return "setogt"; 2826 case ISD::SETOGE: return "setoge"; 2827 case ISD::SETOLT: return "setolt"; 2828 case ISD::SETOLE: return "setole"; 2829 case ISD::SETONE: return "setone"; 2830 2831 case ISD::SETO: return "seto"; 2832 case ISD::SETUO: return "setuo"; 2833 case ISD::SETUEQ: return "setue"; 2834 case ISD::SETUGT: return "setugt"; 2835 case ISD::SETUGE: return "setuge"; 2836 case ISD::SETULT: return "setult"; 2837 case ISD::SETULE: return "setule"; 2838 case ISD::SETUNE: return "setune"; 2839 2840 case ISD::SETEQ: return "seteq"; 2841 case ISD::SETGT: return "setgt"; 2842 case ISD::SETGE: return "setge"; 2843 case ISD::SETLT: return "setlt"; 2844 case ISD::SETLE: return "setle"; 2845 case ISD::SETNE: return "setne"; 2846 } 2847 } 2848} 2849 2850const char *SDNode::getIndexedModeName(ISD::MemIndexedMode AM) { 2851 switch (AM) { 2852 default: 2853 return ""; 2854 case ISD::PRE_INC: 2855 return "<pre-inc>"; 2856 case ISD::PRE_DEC: 2857 return "<pre-dec>"; 2858 case ISD::POST_INC: 2859 return "<post-inc>"; 2860 case ISD::POST_DEC: 2861 return "<post-dec>"; 2862 } 2863} 2864 2865void SDNode::dump() const { dump(0); } 2866void SDNode::dump(const SelectionDAG *G) const { 2867 cerr << (void*)this << ": "; 2868 2869 for (unsigned i = 0, e = getNumValues(); i != e; ++i) { 2870 if (i) cerr << ","; 2871 if (getValueType(i) == MVT::Other) 2872 cerr << "ch"; 2873 else 2874 cerr << MVT::getValueTypeString(getValueType(i)); 2875 } 2876 cerr << " = " << getOperationName(G); 2877 2878 cerr << " "; 2879 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) { 2880 if (i) cerr << ", "; 2881 cerr << (void*)getOperand(i).Val; 2882 if (unsigned RN = getOperand(i).ResNo) 2883 cerr << ":" << RN; 2884 } 2885 2886 if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(this)) { 2887 cerr << "<" << CSDN->getValue() << ">"; 2888 } else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(this)) { 2889 cerr << "<" << CSDN->getValue() << ">"; 2890 } else if (const GlobalAddressSDNode *GADN = 2891 dyn_cast<GlobalAddressSDNode>(this)) { 2892 int offset = GADN->getOffset(); 2893 cerr << "<"; 2894 WriteAsOperand(*cerr.stream(), GADN->getGlobal()) << ">"; 2895 if (offset > 0) 2896 cerr << " + " << offset; 2897 else 2898 cerr << " " << offset; 2899 } else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(this)) { 2900 cerr << "<" << FIDN->getIndex() << ">"; 2901 } else if (const JumpTableSDNode *JTDN = dyn_cast<JumpTableSDNode>(this)) { 2902 cerr << "<" << JTDN->getIndex() << ">"; 2903 } else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(this)){ 2904 int offset = CP->getOffset(); 2905 if (CP->isMachineConstantPoolEntry()) 2906 cerr << "<" << *CP->getMachineCPVal() << ">"; 2907 else 2908 cerr << "<" << *CP->getConstVal() << ">"; 2909 if (offset > 0) 2910 cerr << " + " << offset; 2911 else 2912 cerr << " " << offset; 2913 } else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(this)) { 2914 cerr << "<"; 2915 const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock(); 2916 if (LBB) 2917 cerr << LBB->getName() << " "; 2918 cerr << (const void*)BBDN->getBasicBlock() << ">"; 2919 } else if (const RegisterSDNode *R = dyn_cast<RegisterSDNode>(this)) { 2920 if (G && R->getReg() && MRegisterInfo::isPhysicalRegister(R->getReg())) { 2921 cerr << " " <<G->getTarget().getRegisterInfo()->getName(R->getReg()); 2922 } else { 2923 cerr << " #" << R->getReg(); 2924 } 2925 } else if (const ExternalSymbolSDNode *ES = 2926 dyn_cast<ExternalSymbolSDNode>(this)) { 2927 cerr << "'" << ES->getSymbol() << "'"; 2928 } else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(this)) { 2929 if (M->getValue()) 2930 cerr << "<" << M->getValue() << ":" << M->getOffset() << ">"; 2931 else 2932 cerr << "<null:" << M->getOffset() << ">"; 2933 } else if (const VTSDNode *N = dyn_cast<VTSDNode>(this)) { 2934 cerr << ":" << getValueTypeString(N->getVT()); 2935 } else if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(this)) { 2936 bool doExt = true; 2937 switch (LD->getExtensionType()) { 2938 default: doExt = false; break; 2939 case ISD::EXTLOAD: 2940 cerr << " <anyext "; 2941 break; 2942 case ISD::SEXTLOAD: 2943 cerr << " <sext "; 2944 break; 2945 case ISD::ZEXTLOAD: 2946 cerr << " <zext "; 2947 break; 2948 } 2949 if (doExt) 2950 cerr << MVT::getValueTypeString(LD->getLoadedVT()) << ">"; 2951 2952 const char *AM = getIndexedModeName(LD->getAddressingMode()); 2953 if (AM != "") 2954 cerr << " " << AM; 2955 } else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(this)) { 2956 if (ST->isTruncatingStore()) 2957 cerr << " <trunc " 2958 << MVT::getValueTypeString(ST->getStoredVT()) << ">"; 2959 2960 const char *AM = getIndexedModeName(ST->getAddressingMode()); 2961 if (AM != "") 2962 cerr << " " << AM; 2963 } 2964} 2965 2966static void DumpNodes(const SDNode *N, unsigned indent, const SelectionDAG *G) { 2967 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) 2968 if (N->getOperand(i).Val->hasOneUse()) 2969 DumpNodes(N->getOperand(i).Val, indent+2, G); 2970 else 2971 cerr << "\n" << std::string(indent+2, ' ') 2972 << (void*)N->getOperand(i).Val << ": <multiple use>"; 2973 2974 2975 cerr << "\n" << std::string(indent, ' '); 2976 N->dump(G); 2977} 2978 2979void SelectionDAG::dump() const { 2980 cerr << "SelectionDAG has " << AllNodes.size() << " nodes:"; 2981 std::vector<const SDNode*> Nodes; 2982 for (allnodes_const_iterator I = allnodes_begin(), E = allnodes_end(); 2983 I != E; ++I) 2984 Nodes.push_back(I); 2985 2986 std::sort(Nodes.begin(), Nodes.end()); 2987 2988 for (unsigned i = 0, e = Nodes.size(); i != e; ++i) { 2989 if (!Nodes[i]->hasOneUse() && Nodes[i] != getRoot().Val) 2990 DumpNodes(Nodes[i], 2, this); 2991 } 2992 2993 if (getRoot().Val) DumpNodes(getRoot().Val, 2, this); 2994 2995 cerr << "\n\n"; 2996} 2997 2998const Type *ConstantPoolSDNode::getType() const { 2999 if (isMachineConstantPoolEntry()) 3000 return Val.MachineCPVal->getType(); 3001 return Val.ConstVal->getType(); 3002} 3003