SelectionDAG.cpp revision fb194b9e738ab2730ea0a3189f091737aba31c5b
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/Assembly/Writer.h" 18#include "llvm/CodeGen/MachineBasicBlock.h" 19#include "llvm/Support/MathExtras.h" 20#include "llvm/Target/MRegisterInfo.h" 21#include "llvm/Target/TargetLowering.h" 22#include "llvm/Target/TargetInstrInfo.h" 23#include "llvm/Target/TargetMachine.h" 24#include "llvm/ADT/SetVector.h" 25#include "llvm/ADT/StringExtras.h" 26#include <iostream> 27#include <set> 28#include <cmath> 29#include <algorithm> 30using namespace llvm; 31 32static bool isCommutativeBinOp(unsigned Opcode) { 33 switch (Opcode) { 34 case ISD::ADD: 35 case ISD::MUL: 36 case ISD::MULHU: 37 case ISD::MULHS: 38 case ISD::FADD: 39 case ISD::FMUL: 40 case ISD::AND: 41 case ISD::OR: 42 case ISD::XOR: return true; 43 default: return false; // FIXME: Need commutative info for user ops! 44 } 45} 46 47// isInvertibleForFree - Return true if there is no cost to emitting the logical 48// inverse of this node. 49static bool isInvertibleForFree(SDOperand N) { 50 if (isa<ConstantSDNode>(N.Val)) return true; 51 if (N.Val->getOpcode() == ISD::SETCC && N.Val->hasOneUse()) 52 return true; 53 return false; 54} 55 56//===----------------------------------------------------------------------===// 57// ConstantFPSDNode Class 58//===----------------------------------------------------------------------===// 59 60/// isExactlyValue - We don't rely on operator== working on double values, as 61/// it returns true for things that are clearly not equal, like -0.0 and 0.0. 62/// As such, this method can be used to do an exact bit-for-bit comparison of 63/// two floating point values. 64bool ConstantFPSDNode::isExactlyValue(double V) const { 65 return DoubleToBits(V) == DoubleToBits(Value); 66} 67 68//===----------------------------------------------------------------------===// 69// ISD Class 70//===----------------------------------------------------------------------===// 71 72/// getSetCCSwappedOperands - Return the operation corresponding to (Y op X) 73/// when given the operation for (X op Y). 74ISD::CondCode ISD::getSetCCSwappedOperands(ISD::CondCode Operation) { 75 // To perform this operation, we just need to swap the L and G bits of the 76 // operation. 77 unsigned OldL = (Operation >> 2) & 1; 78 unsigned OldG = (Operation >> 1) & 1; 79 return ISD::CondCode((Operation & ~6) | // Keep the N, U, E bits 80 (OldL << 1) | // New G bit 81 (OldG << 2)); // New L bit. 82} 83 84/// getSetCCInverse - Return the operation corresponding to !(X op Y), where 85/// 'op' is a valid SetCC operation. 86ISD::CondCode ISD::getSetCCInverse(ISD::CondCode Op, bool isInteger) { 87 unsigned Operation = Op; 88 if (isInteger) 89 Operation ^= 7; // Flip L, G, E bits, but not U. 90 else 91 Operation ^= 15; // Flip all of the condition bits. 92 if (Operation > ISD::SETTRUE2) 93 Operation &= ~8; // Don't let N and U bits get set. 94 return ISD::CondCode(Operation); 95} 96 97 98/// isSignedOp - For an integer comparison, return 1 if the comparison is a 99/// signed operation and 2 if the result is an unsigned comparison. Return zero 100/// if the operation does not depend on the sign of the input (setne and seteq). 101static int isSignedOp(ISD::CondCode Opcode) { 102 switch (Opcode) { 103 default: assert(0 && "Illegal integer setcc operation!"); 104 case ISD::SETEQ: 105 case ISD::SETNE: return 0; 106 case ISD::SETLT: 107 case ISD::SETLE: 108 case ISD::SETGT: 109 case ISD::SETGE: return 1; 110 case ISD::SETULT: 111 case ISD::SETULE: 112 case ISD::SETUGT: 113 case ISD::SETUGE: return 2; 114 } 115} 116 117/// getSetCCOrOperation - Return the result of a logical OR between different 118/// comparisons of identical values: ((X op1 Y) | (X op2 Y)). This function 119/// returns SETCC_INVALID if it is not possible to represent the resultant 120/// comparison. 121ISD::CondCode ISD::getSetCCOrOperation(ISD::CondCode Op1, ISD::CondCode Op2, 122 bool isInteger) { 123 if (isInteger && (isSignedOp(Op1) | isSignedOp(Op2)) == 3) 124 // Cannot fold a signed integer setcc with an unsigned integer setcc. 125 return ISD::SETCC_INVALID; 126 127 unsigned Op = Op1 | Op2; // Combine all of the condition bits. 128 129 // If the N and U bits get set then the resultant comparison DOES suddenly 130 // care about orderedness, and is true when ordered. 131 if (Op > ISD::SETTRUE2) 132 Op &= ~16; // Clear the N bit. 133 return ISD::CondCode(Op); 134} 135 136/// getSetCCAndOperation - Return the result of a logical AND between different 137/// comparisons of identical values: ((X op1 Y) & (X op2 Y)). This 138/// function returns zero if it is not possible to represent the resultant 139/// comparison. 140ISD::CondCode ISD::getSetCCAndOperation(ISD::CondCode Op1, ISD::CondCode Op2, 141 bool isInteger) { 142 if (isInteger && (isSignedOp(Op1) | isSignedOp(Op2)) == 3) 143 // Cannot fold a signed setcc with an unsigned setcc. 144 return ISD::SETCC_INVALID; 145 146 // Combine all of the condition bits. 147 return ISD::CondCode(Op1 & Op2); 148} 149 150const TargetMachine &SelectionDAG::getTarget() const { 151 return TLI.getTargetMachine(); 152} 153 154//===----------------------------------------------------------------------===// 155// SelectionDAG Class 156//===----------------------------------------------------------------------===// 157 158/// RemoveDeadNodes - This method deletes all unreachable nodes in the 159/// SelectionDAG, including nodes (like loads) that have uses of their token 160/// chain but no other uses and no side effect. If a node is passed in as an 161/// argument, it is used as the seed for node deletion. 162void SelectionDAG::RemoveDeadNodes(SDNode *N) { 163 // Create a dummy node (which is not added to allnodes), that adds a reference 164 // to the root node, preventing it from being deleted. 165 HandleSDNode Dummy(getRoot()); 166 167 bool MadeChange = false; 168 169 // If we have a hint to start from, use it. 170 if (N && N->use_empty()) { 171 DestroyDeadNode(N); 172 MadeChange = true; 173 } 174 175 for (allnodes_iterator I = allnodes_begin(), E = allnodes_end(); I != E; ++I) 176 if (I->use_empty() && I->getOpcode() != 65535) { 177 // Node is dead, recursively delete newly dead uses. 178 DestroyDeadNode(I); 179 MadeChange = true; 180 } 181 182 // Walk the nodes list, removing the nodes we've marked as dead. 183 if (MadeChange) { 184 for (allnodes_iterator I = allnodes_begin(), E = allnodes_end(); I != E; ) { 185 SDNode *N = I++; 186 if (N->use_empty()) 187 AllNodes.erase(N); 188 } 189 } 190 191 // If the root changed (e.g. it was a dead load, update the root). 192 setRoot(Dummy.getValue()); 193} 194 195/// DestroyDeadNode - We know that N is dead. Nuke it from the CSE maps for the 196/// graph. If it is the last user of any of its operands, recursively process 197/// them the same way. 198/// 199void SelectionDAG::DestroyDeadNode(SDNode *N) { 200 // Okay, we really are going to delete this node. First take this out of the 201 // appropriate CSE map. 202 RemoveNodeFromCSEMaps(N); 203 204 // Next, brutally remove the operand list. This is safe to do, as there are 205 // no cycles in the graph. 206 for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) { 207 SDNode *O = I->Val; 208 O->removeUser(N); 209 210 // Now that we removed this operand, see if there are no uses of it left. 211 if (O->use_empty()) 212 DestroyDeadNode(O); 213 } 214 delete[] N->OperandList; 215 N->OperandList = 0; 216 N->NumOperands = 0; 217 218 // Mark the node as dead. 219 N->MorphNodeTo(65535); 220} 221 222void SelectionDAG::DeleteNode(SDNode *N) { 223 assert(N->use_empty() && "Cannot delete a node that is not dead!"); 224 225 // First take this out of the appropriate CSE map. 226 RemoveNodeFromCSEMaps(N); 227 228 // Finally, remove uses due to operands of this node, remove from the 229 // AllNodes list, and delete the node. 230 DeleteNodeNotInCSEMaps(N); 231} 232 233void SelectionDAG::DeleteNodeNotInCSEMaps(SDNode *N) { 234 235 // Remove it from the AllNodes list. 236 AllNodes.remove(N); 237 238 // Drop all of the operands and decrement used nodes use counts. 239 for (SDNode::op_iterator I = N->op_begin(), E = N->op_end(); I != E; ++I) 240 I->Val->removeUser(N); 241 delete[] N->OperandList; 242 N->OperandList = 0; 243 N->NumOperands = 0; 244 245 delete N; 246} 247 248/// RemoveNodeFromCSEMaps - Take the specified node out of the CSE map that 249/// correspond to it. This is useful when we're about to delete or repurpose 250/// the node. We don't want future request for structurally identical nodes 251/// to return N anymore. 252void SelectionDAG::RemoveNodeFromCSEMaps(SDNode *N) { 253 bool Erased = false; 254 switch (N->getOpcode()) { 255 case ISD::HANDLENODE: return; // noop. 256 case ISD::Constant: 257 Erased = Constants.erase(std::make_pair(cast<ConstantSDNode>(N)->getValue(), 258 N->getValueType(0))); 259 break; 260 case ISD::TargetConstant: 261 Erased = TargetConstants.erase(std::make_pair( 262 cast<ConstantSDNode>(N)->getValue(), 263 N->getValueType(0))); 264 break; 265 case ISD::ConstantFP: { 266 uint64_t V = DoubleToBits(cast<ConstantFPSDNode>(N)->getValue()); 267 Erased = ConstantFPs.erase(std::make_pair(V, N->getValueType(0))); 268 break; 269 } 270 case ISD::TargetConstantFP: { 271 uint64_t V = DoubleToBits(cast<ConstantFPSDNode>(N)->getValue()); 272 Erased = TargetConstantFPs.erase(std::make_pair(V, N->getValueType(0))); 273 break; 274 } 275 case ISD::STRING: 276 Erased = StringNodes.erase(cast<StringSDNode>(N)->getValue()); 277 break; 278 case ISD::CONDCODE: 279 assert(CondCodeNodes[cast<CondCodeSDNode>(N)->get()] && 280 "Cond code doesn't exist!"); 281 Erased = CondCodeNodes[cast<CondCodeSDNode>(N)->get()] != 0; 282 CondCodeNodes[cast<CondCodeSDNode>(N)->get()] = 0; 283 break; 284 case ISD::GlobalAddress: { 285 GlobalAddressSDNode *GN = cast<GlobalAddressSDNode>(N); 286 Erased = GlobalValues.erase(std::make_pair(GN->getGlobal(), 287 GN->getOffset())); 288 break; 289 } 290 case ISD::TargetGlobalAddress: { 291 GlobalAddressSDNode *GN = cast<GlobalAddressSDNode>(N); 292 Erased =TargetGlobalValues.erase(std::make_pair(GN->getGlobal(), 293 GN->getOffset())); 294 break; 295 } 296 case ISD::FrameIndex: 297 Erased = FrameIndices.erase(cast<FrameIndexSDNode>(N)->getIndex()); 298 break; 299 case ISD::TargetFrameIndex: 300 Erased = TargetFrameIndices.erase(cast<FrameIndexSDNode>(N)->getIndex()); 301 break; 302 case ISD::ConstantPool: 303 Erased = ConstantPoolIndices. 304 erase(std::make_pair(cast<ConstantPoolSDNode>(N)->get(), 305 std::make_pair(cast<ConstantPoolSDNode>(N)->getOffset(), 306 cast<ConstantPoolSDNode>(N)->getAlignment()))); 307 break; 308 case ISD::TargetConstantPool: 309 Erased = TargetConstantPoolIndices. 310 erase(std::make_pair(cast<ConstantPoolSDNode>(N)->get(), 311 std::make_pair(cast<ConstantPoolSDNode>(N)->getOffset(), 312 cast<ConstantPoolSDNode>(N)->getAlignment()))); 313 break; 314 case ISD::BasicBlock: 315 Erased = BBNodes.erase(cast<BasicBlockSDNode>(N)->getBasicBlock()); 316 break; 317 case ISD::ExternalSymbol: 318 Erased = ExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol()); 319 break; 320 case ISD::TargetExternalSymbol: 321 Erased = 322 TargetExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol()); 323 break; 324 case ISD::VALUETYPE: 325 Erased = ValueTypeNodes[cast<VTSDNode>(N)->getVT()] != 0; 326 ValueTypeNodes[cast<VTSDNode>(N)->getVT()] = 0; 327 break; 328 case ISD::Register: 329 Erased = RegNodes.erase(std::make_pair(cast<RegisterSDNode>(N)->getReg(), 330 N->getValueType(0))); 331 break; 332 case ISD::SRCVALUE: { 333 SrcValueSDNode *SVN = cast<SrcValueSDNode>(N); 334 Erased =ValueNodes.erase(std::make_pair(SVN->getValue(), SVN->getOffset())); 335 break; 336 } 337 case ISD::LOAD: 338 Erased = Loads.erase(std::make_pair(N->getOperand(1), 339 std::make_pair(N->getOperand(0), 340 N->getValueType(0)))); 341 break; 342 default: 343 if (N->getNumValues() == 1) { 344 if (N->getNumOperands() == 0) { 345 Erased = NullaryOps.erase(std::make_pair(N->getOpcode(), 346 N->getValueType(0))); 347 } else if (N->getNumOperands() == 1) { 348 Erased = 349 UnaryOps.erase(std::make_pair(N->getOpcode(), 350 std::make_pair(N->getOperand(0), 351 N->getValueType(0)))); 352 } else if (N->getNumOperands() == 2) { 353 Erased = 354 BinaryOps.erase(std::make_pair(N->getOpcode(), 355 std::make_pair(N->getOperand(0), 356 N->getOperand(1)))); 357 } else { 358 std::vector<SDOperand> Ops(N->op_begin(), N->op_end()); 359 Erased = 360 OneResultNodes.erase(std::make_pair(N->getOpcode(), 361 std::make_pair(N->getValueType(0), 362 Ops))); 363 } 364 } else { 365 // Remove the node from the ArbitraryNodes map. 366 std::vector<MVT::ValueType> RV(N->value_begin(), N->value_end()); 367 std::vector<SDOperand> Ops(N->op_begin(), N->op_end()); 368 Erased = 369 ArbitraryNodes.erase(std::make_pair(N->getOpcode(), 370 std::make_pair(RV, Ops))); 371 } 372 break; 373 } 374#ifndef NDEBUG 375 // Verify that the node was actually in one of the CSE maps, unless it has a 376 // flag result (which cannot be CSE'd) or is one of the special cases that are 377 // not subject to CSE. 378 if (!Erased && N->getValueType(N->getNumValues()-1) != MVT::Flag && 379 !N->isTargetOpcode()) { 380 N->dump(); 381 assert(0 && "Node is not in map!"); 382 } 383#endif 384} 385 386/// AddNonLeafNodeToCSEMaps - Add the specified node back to the CSE maps. It 387/// has been taken out and modified in some way. If the specified node already 388/// exists in the CSE maps, do not modify the maps, but return the existing node 389/// instead. If it doesn't exist, add it and return null. 390/// 391SDNode *SelectionDAG::AddNonLeafNodeToCSEMaps(SDNode *N) { 392 assert(N->getNumOperands() && "This is a leaf node!"); 393 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag) 394 return 0; // Never add these nodes. 395 396 // Check that remaining values produced are not flags. 397 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i) 398 if (N->getValueType(i) == MVT::Flag) 399 return 0; // Never CSE anything that produces a flag. 400 401 if (N->getNumValues() == 1) { 402 if (N->getNumOperands() == 1) { 403 SDNode *&U = UnaryOps[std::make_pair(N->getOpcode(), 404 std::make_pair(N->getOperand(0), 405 N->getValueType(0)))]; 406 if (U) return U; 407 U = N; 408 } else if (N->getNumOperands() == 2) { 409 SDNode *&B = BinaryOps[std::make_pair(N->getOpcode(), 410 std::make_pair(N->getOperand(0), 411 N->getOperand(1)))]; 412 if (B) return B; 413 B = N; 414 } else { 415 std::vector<SDOperand> Ops(N->op_begin(), N->op_end()); 416 SDNode *&ORN = OneResultNodes[std::make_pair(N->getOpcode(), 417 std::make_pair(N->getValueType(0), Ops))]; 418 if (ORN) return ORN; 419 ORN = N; 420 } 421 } else { 422 if (N->getOpcode() == ISD::LOAD) { 423 SDNode *&L = Loads[std::make_pair(N->getOperand(1), 424 std::make_pair(N->getOperand(0), 425 N->getValueType(0)))]; 426 if (L) return L; 427 L = N; 428 } else { 429 // Remove the node from the ArbitraryNodes map. 430 std::vector<MVT::ValueType> RV(N->value_begin(), N->value_end()); 431 std::vector<SDOperand> Ops(N->op_begin(), N->op_end()); 432 SDNode *&AN = ArbitraryNodes[std::make_pair(N->getOpcode(), 433 std::make_pair(RV, Ops))]; 434 if (AN) return AN; 435 AN = N; 436 } 437 } 438 return 0; 439} 440 441/// FindModifiedNodeSlot - Find a slot for the specified node if its operands 442/// were replaced with those specified. If this node is never memoized, 443/// return null, otherwise return a pointer to the slot it would take. If a 444/// node already exists with these operands, the slot will be non-null. 445SDNode **SelectionDAG::FindModifiedNodeSlot(SDNode *N, SDOperand Op) { 446 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag) 447 return 0; // Never add these nodes. 448 449 // Check that remaining values produced are not flags. 450 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i) 451 if (N->getValueType(i) == MVT::Flag) 452 return 0; // Never CSE anything that produces a flag. 453 454 if (N->getNumValues() == 1) { 455 return &UnaryOps[std::make_pair(N->getOpcode(), 456 std::make_pair(Op, N->getValueType(0)))]; 457 } else { 458 // Remove the node from the ArbitraryNodes map. 459 std::vector<MVT::ValueType> RV(N->value_begin(), N->value_end()); 460 std::vector<SDOperand> Ops; 461 Ops.push_back(Op); 462 return &ArbitraryNodes[std::make_pair(N->getOpcode(), 463 std::make_pair(RV, Ops))]; 464 } 465 return 0; 466} 467 468/// FindModifiedNodeSlot - Find a slot for the specified node if its operands 469/// were replaced with those specified. If this node is never memoized, 470/// return null, otherwise return a pointer to the slot it would take. If a 471/// node already exists with these operands, the slot will be non-null. 472SDNode **SelectionDAG::FindModifiedNodeSlot(SDNode *N, 473 SDOperand Op1, SDOperand Op2) { 474 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag) 475 return 0; // Never add these nodes. 476 477 // Check that remaining values produced are not flags. 478 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i) 479 if (N->getValueType(i) == MVT::Flag) 480 return 0; // Never CSE anything that produces a flag. 481 482 if (N->getNumValues() == 1) { 483 return &BinaryOps[std::make_pair(N->getOpcode(), 484 std::make_pair(Op1, Op2))]; 485 } else { 486 std::vector<MVT::ValueType> RV(N->value_begin(), N->value_end()); 487 std::vector<SDOperand> Ops; 488 Ops.push_back(Op1); 489 Ops.push_back(Op2); 490 return &ArbitraryNodes[std::make_pair(N->getOpcode(), 491 std::make_pair(RV, Ops))]; 492 } 493 return 0; 494} 495 496 497/// FindModifiedNodeSlot - Find a slot for the specified node if its operands 498/// were replaced with those specified. If this node is never memoized, 499/// return null, otherwise return a pointer to the slot it would take. If a 500/// node already exists with these operands, the slot will be non-null. 501SDNode **SelectionDAG::FindModifiedNodeSlot(SDNode *N, 502 const std::vector<SDOperand> &Ops) { 503 if (N->getOpcode() == ISD::HANDLENODE || N->getValueType(0) == MVT::Flag) 504 return 0; // Never add these nodes. 505 506 // Check that remaining values produced are not flags. 507 for (unsigned i = 1, e = N->getNumValues(); i != e; ++i) 508 if (N->getValueType(i) == MVT::Flag) 509 return 0; // Never CSE anything that produces a flag. 510 511 if (N->getNumValues() == 1) { 512 if (N->getNumOperands() == 1) { 513 return &UnaryOps[std::make_pair(N->getOpcode(), 514 std::make_pair(Ops[0], 515 N->getValueType(0)))]; 516 } else if (N->getNumOperands() == 2) { 517 return &BinaryOps[std::make_pair(N->getOpcode(), 518 std::make_pair(Ops[0], Ops[1]))]; 519 } else { 520 return &OneResultNodes[std::make_pair(N->getOpcode(), 521 std::make_pair(N->getValueType(0), 522 Ops))]; 523 } 524 } else { 525 if (N->getOpcode() == ISD::LOAD) { 526 return &Loads[std::make_pair(Ops[1], 527 std::make_pair(Ops[0], N->getValueType(0)))]; 528 } else { 529 std::vector<MVT::ValueType> RV(N->value_begin(), N->value_end()); 530 return &ArbitraryNodes[std::make_pair(N->getOpcode(), 531 std::make_pair(RV, Ops))]; 532 } 533 } 534 return 0; 535} 536 537 538SelectionDAG::~SelectionDAG() { 539 while (!AllNodes.empty()) { 540 SDNode *N = AllNodes.begin(); 541 delete [] N->OperandList; 542 N->OperandList = 0; 543 N->NumOperands = 0; 544 AllNodes.pop_front(); 545 } 546} 547 548SDOperand SelectionDAG::getZeroExtendInReg(SDOperand Op, MVT::ValueType VT) { 549 if (Op.getValueType() == VT) return Op; 550 int64_t Imm = ~0ULL >> (64-MVT::getSizeInBits(VT)); 551 return getNode(ISD::AND, Op.getValueType(), Op, 552 getConstant(Imm, Op.getValueType())); 553} 554 555SDOperand SelectionDAG::getConstant(uint64_t Val, MVT::ValueType VT) { 556 assert(MVT::isInteger(VT) && "Cannot create FP integer constant!"); 557 // Mask out any bits that are not valid for this constant. 558 if (VT != MVT::i64) 559 Val &= ((uint64_t)1 << MVT::getSizeInBits(VT)) - 1; 560 561 SDNode *&N = Constants[std::make_pair(Val, VT)]; 562 if (N) return SDOperand(N, 0); 563 N = new ConstantSDNode(false, Val, VT); 564 AllNodes.push_back(N); 565 return SDOperand(N, 0); 566} 567 568SDOperand SelectionDAG::getString(const std::string &Val) { 569 StringSDNode *&N = StringNodes[Val]; 570 if (!N) { 571 N = new StringSDNode(Val); 572 AllNodes.push_back(N); 573 } 574 return SDOperand(N, 0); 575} 576 577SDOperand SelectionDAG::getTargetConstant(uint64_t Val, MVT::ValueType VT) { 578 assert(MVT::isInteger(VT) && "Cannot create FP integer constant!"); 579 // Mask out any bits that are not valid for this constant. 580 if (VT != MVT::i64) 581 Val &= ((uint64_t)1 << MVT::getSizeInBits(VT)) - 1; 582 583 SDNode *&N = TargetConstants[std::make_pair(Val, VT)]; 584 if (N) return SDOperand(N, 0); 585 N = new ConstantSDNode(true, Val, VT); 586 AllNodes.push_back(N); 587 return SDOperand(N, 0); 588} 589 590SDOperand SelectionDAG::getConstantFP(double Val, MVT::ValueType VT) { 591 assert(MVT::isFloatingPoint(VT) && "Cannot create integer FP constant!"); 592 if (VT == MVT::f32) 593 Val = (float)Val; // Mask out extra precision. 594 595 // Do the map lookup using the actual bit pattern for the floating point 596 // value, so that we don't have problems with 0.0 comparing equal to -0.0, and 597 // we don't have issues with SNANs. 598 SDNode *&N = ConstantFPs[std::make_pair(DoubleToBits(Val), VT)]; 599 if (N) return SDOperand(N, 0); 600 N = new ConstantFPSDNode(false, Val, VT); 601 AllNodes.push_back(N); 602 return SDOperand(N, 0); 603} 604 605SDOperand SelectionDAG::getTargetConstantFP(double Val, MVT::ValueType VT) { 606 assert(MVT::isFloatingPoint(VT) && "Cannot create integer FP constant!"); 607 if (VT == MVT::f32) 608 Val = (float)Val; // Mask out extra precision. 609 610 // Do the map lookup using the actual bit pattern for the floating point 611 // value, so that we don't have problems with 0.0 comparing equal to -0.0, and 612 // we don't have issues with SNANs. 613 SDNode *&N = TargetConstantFPs[std::make_pair(DoubleToBits(Val), VT)]; 614 if (N) return SDOperand(N, 0); 615 N = new ConstantFPSDNode(true, Val, VT); 616 AllNodes.push_back(N); 617 return SDOperand(N, 0); 618} 619 620SDOperand SelectionDAG::getGlobalAddress(const GlobalValue *GV, 621 MVT::ValueType VT, int offset) { 622 SDNode *&N = GlobalValues[std::make_pair(GV, offset)]; 623 if (N) return SDOperand(N, 0); 624 N = new GlobalAddressSDNode(false, GV, VT, offset); 625 AllNodes.push_back(N); 626 return SDOperand(N, 0); 627} 628 629SDOperand SelectionDAG::getTargetGlobalAddress(const GlobalValue *GV, 630 MVT::ValueType VT, int offset) { 631 SDNode *&N = TargetGlobalValues[std::make_pair(GV, offset)]; 632 if (N) return SDOperand(N, 0); 633 N = new GlobalAddressSDNode(true, GV, VT, offset); 634 AllNodes.push_back(N); 635 return SDOperand(N, 0); 636} 637 638SDOperand SelectionDAG::getFrameIndex(int FI, MVT::ValueType VT) { 639 SDNode *&N = FrameIndices[FI]; 640 if (N) return SDOperand(N, 0); 641 N = new FrameIndexSDNode(FI, VT, false); 642 AllNodes.push_back(N); 643 return SDOperand(N, 0); 644} 645 646SDOperand SelectionDAG::getTargetFrameIndex(int FI, MVT::ValueType VT) { 647 SDNode *&N = TargetFrameIndices[FI]; 648 if (N) return SDOperand(N, 0); 649 N = new FrameIndexSDNode(FI, VT, true); 650 AllNodes.push_back(N); 651 return SDOperand(N, 0); 652} 653 654SDOperand SelectionDAG::getConstantPool(Constant *C, MVT::ValueType VT, 655 unsigned Alignment, int Offset) { 656 SDNode *&N = ConstantPoolIndices[std::make_pair(C, 657 std::make_pair(Offset, Alignment))]; 658 if (N) return SDOperand(N, 0); 659 N = new ConstantPoolSDNode(false, C, VT, Offset, Alignment); 660 AllNodes.push_back(N); 661 return SDOperand(N, 0); 662} 663 664SDOperand SelectionDAG::getTargetConstantPool(Constant *C, MVT::ValueType VT, 665 unsigned Alignment, int Offset) { 666 SDNode *&N = TargetConstantPoolIndices[std::make_pair(C, 667 std::make_pair(Offset, Alignment))]; 668 if (N) return SDOperand(N, 0); 669 N = new ConstantPoolSDNode(true, C, VT, Offset, Alignment); 670 AllNodes.push_back(N); 671 return SDOperand(N, 0); 672} 673 674SDOperand SelectionDAG::getBasicBlock(MachineBasicBlock *MBB) { 675 SDNode *&N = BBNodes[MBB]; 676 if (N) return SDOperand(N, 0); 677 N = new BasicBlockSDNode(MBB); 678 AllNodes.push_back(N); 679 return SDOperand(N, 0); 680} 681 682SDOperand SelectionDAG::getValueType(MVT::ValueType VT) { 683 if ((unsigned)VT >= ValueTypeNodes.size()) 684 ValueTypeNodes.resize(VT+1); 685 if (ValueTypeNodes[VT] == 0) { 686 ValueTypeNodes[VT] = new VTSDNode(VT); 687 AllNodes.push_back(ValueTypeNodes[VT]); 688 } 689 690 return SDOperand(ValueTypeNodes[VT], 0); 691} 692 693SDOperand SelectionDAG::getExternalSymbol(const char *Sym, MVT::ValueType VT) { 694 SDNode *&N = ExternalSymbols[Sym]; 695 if (N) return SDOperand(N, 0); 696 N = new ExternalSymbolSDNode(false, Sym, VT); 697 AllNodes.push_back(N); 698 return SDOperand(N, 0); 699} 700 701SDOperand SelectionDAG::getTargetExternalSymbol(const char *Sym, 702 MVT::ValueType VT) { 703 SDNode *&N = TargetExternalSymbols[Sym]; 704 if (N) return SDOperand(N, 0); 705 N = new ExternalSymbolSDNode(true, Sym, VT); 706 AllNodes.push_back(N); 707 return SDOperand(N, 0); 708} 709 710SDOperand SelectionDAG::getCondCode(ISD::CondCode Cond) { 711 if ((unsigned)Cond >= CondCodeNodes.size()) 712 CondCodeNodes.resize(Cond+1); 713 714 if (CondCodeNodes[Cond] == 0) { 715 CondCodeNodes[Cond] = new CondCodeSDNode(Cond); 716 AllNodes.push_back(CondCodeNodes[Cond]); 717 } 718 return SDOperand(CondCodeNodes[Cond], 0); 719} 720 721SDOperand SelectionDAG::getRegister(unsigned RegNo, MVT::ValueType VT) { 722 RegisterSDNode *&Reg = RegNodes[std::make_pair(RegNo, VT)]; 723 if (!Reg) { 724 Reg = new RegisterSDNode(RegNo, VT); 725 AllNodes.push_back(Reg); 726 } 727 return SDOperand(Reg, 0); 728} 729 730SDOperand SelectionDAG::SimplifySetCC(MVT::ValueType VT, SDOperand N1, 731 SDOperand N2, ISD::CondCode Cond) { 732 // These setcc operations always fold. 733 switch (Cond) { 734 default: break; 735 case ISD::SETFALSE: 736 case ISD::SETFALSE2: return getConstant(0, VT); 737 case ISD::SETTRUE: 738 case ISD::SETTRUE2: return getConstant(1, VT); 739 } 740 741 if (ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val)) { 742 uint64_t C2 = N2C->getValue(); 743 if (ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val)) { 744 uint64_t C1 = N1C->getValue(); 745 746 // Sign extend the operands if required 747 if (ISD::isSignedIntSetCC(Cond)) { 748 C1 = N1C->getSignExtended(); 749 C2 = N2C->getSignExtended(); 750 } 751 752 switch (Cond) { 753 default: assert(0 && "Unknown integer setcc!"); 754 case ISD::SETEQ: return getConstant(C1 == C2, VT); 755 case ISD::SETNE: return getConstant(C1 != C2, VT); 756 case ISD::SETULT: return getConstant(C1 < C2, VT); 757 case ISD::SETUGT: return getConstant(C1 > C2, VT); 758 case ISD::SETULE: return getConstant(C1 <= C2, VT); 759 case ISD::SETUGE: return getConstant(C1 >= C2, VT); 760 case ISD::SETLT: return getConstant((int64_t)C1 < (int64_t)C2, VT); 761 case ISD::SETGT: return getConstant((int64_t)C1 > (int64_t)C2, VT); 762 case ISD::SETLE: return getConstant((int64_t)C1 <= (int64_t)C2, VT); 763 case ISD::SETGE: return getConstant((int64_t)C1 >= (int64_t)C2, VT); 764 } 765 } else { 766 // If the LHS is a ZERO_EXTEND, perform the comparison on the input. 767 if (N1.getOpcode() == ISD::ZERO_EXTEND) { 768 unsigned InSize = MVT::getSizeInBits(N1.getOperand(0).getValueType()); 769 770 // If the comparison constant has bits in the upper part, the 771 // zero-extended value could never match. 772 if (C2 & (~0ULL << InSize)) { 773 unsigned VSize = MVT::getSizeInBits(N1.getValueType()); 774 switch (Cond) { 775 case ISD::SETUGT: 776 case ISD::SETUGE: 777 case ISD::SETEQ: return getConstant(0, VT); 778 case ISD::SETULT: 779 case ISD::SETULE: 780 case ISD::SETNE: return getConstant(1, VT); 781 case ISD::SETGT: 782 case ISD::SETGE: 783 // True if the sign bit of C2 is set. 784 return getConstant((C2 & (1ULL << VSize)) != 0, VT); 785 case ISD::SETLT: 786 case ISD::SETLE: 787 // True if the sign bit of C2 isn't set. 788 return getConstant((C2 & (1ULL << VSize)) == 0, VT); 789 default: 790 break; 791 } 792 } 793 794 // Otherwise, we can perform the comparison with the low bits. 795 switch (Cond) { 796 case ISD::SETEQ: 797 case ISD::SETNE: 798 case ISD::SETUGT: 799 case ISD::SETUGE: 800 case ISD::SETULT: 801 case ISD::SETULE: 802 return getSetCC(VT, N1.getOperand(0), 803 getConstant(C2, N1.getOperand(0).getValueType()), 804 Cond); 805 default: 806 break; // todo, be more careful with signed comparisons 807 } 808 } else if (N1.getOpcode() == ISD::SIGN_EXTEND_INREG && 809 (Cond == ISD::SETEQ || Cond == ISD::SETNE)) { 810 MVT::ValueType ExtSrcTy = cast<VTSDNode>(N1.getOperand(1))->getVT(); 811 unsigned ExtSrcTyBits = MVT::getSizeInBits(ExtSrcTy); 812 MVT::ValueType ExtDstTy = N1.getValueType(); 813 unsigned ExtDstTyBits = MVT::getSizeInBits(ExtDstTy); 814 815 // If the extended part has any inconsistent bits, it cannot ever 816 // compare equal. In other words, they have to be all ones or all 817 // zeros. 818 uint64_t ExtBits = 819 (~0ULL >> (64-ExtSrcTyBits)) & (~0ULL << (ExtDstTyBits-1)); 820 if ((C2 & ExtBits) != 0 && (C2 & ExtBits) != ExtBits) 821 return getConstant(Cond == ISD::SETNE, VT); 822 823 // Otherwise, make this a use of a zext. 824 return getSetCC(VT, getZeroExtendInReg(N1.getOperand(0), ExtSrcTy), 825 getConstant(C2 & (~0ULL>>(64-ExtSrcTyBits)), ExtDstTy), 826 Cond); 827 } 828 829 uint64_t MinVal, MaxVal; 830 unsigned OperandBitSize = MVT::getSizeInBits(N2C->getValueType(0)); 831 if (ISD::isSignedIntSetCC(Cond)) { 832 MinVal = 1ULL << (OperandBitSize-1); 833 if (OperandBitSize != 1) // Avoid X >> 64, which is undefined. 834 MaxVal = ~0ULL >> (65-OperandBitSize); 835 else 836 MaxVal = 0; 837 } else { 838 MinVal = 0; 839 MaxVal = ~0ULL >> (64-OperandBitSize); 840 } 841 842 // Canonicalize GE/LE comparisons to use GT/LT comparisons. 843 if (Cond == ISD::SETGE || Cond == ISD::SETUGE) { 844 if (C2 == MinVal) return getConstant(1, VT); // X >= MIN --> true 845 --C2; // X >= C1 --> X > (C1-1) 846 return getSetCC(VT, N1, getConstant(C2, N2.getValueType()), 847 (Cond == ISD::SETGE) ? ISD::SETGT : ISD::SETUGT); 848 } 849 850 if (Cond == ISD::SETLE || Cond == ISD::SETULE) { 851 if (C2 == MaxVal) return getConstant(1, VT); // X <= MAX --> true 852 ++C2; // X <= C1 --> X < (C1+1) 853 return getSetCC(VT, N1, getConstant(C2, N2.getValueType()), 854 (Cond == ISD::SETLE) ? ISD::SETLT : ISD::SETULT); 855 } 856 857 if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C2 == MinVal) 858 return getConstant(0, VT); // X < MIN --> false 859 860 // Canonicalize setgt X, Min --> setne X, Min 861 if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C2 == MinVal) 862 return getSetCC(VT, N1, N2, ISD::SETNE); 863 864 // If we have setult X, 1, turn it into seteq X, 0 865 if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C2 == MinVal+1) 866 return getSetCC(VT, N1, getConstant(MinVal, N1.getValueType()), 867 ISD::SETEQ); 868 // If we have setugt X, Max-1, turn it into seteq X, Max 869 else if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C2 == MaxVal-1) 870 return getSetCC(VT, N1, getConstant(MaxVal, N1.getValueType()), 871 ISD::SETEQ); 872 873 // If we have "setcc X, C1", check to see if we can shrink the immediate 874 // by changing cc. 875 876 // SETUGT X, SINTMAX -> SETLT X, 0 877 if (Cond == ISD::SETUGT && OperandBitSize != 1 && 878 C2 == (~0ULL >> (65-OperandBitSize))) 879 return getSetCC(VT, N1, getConstant(0, N2.getValueType()), ISD::SETLT); 880 881 // FIXME: Implement the rest of these. 882 883 884 // Fold bit comparisons when we can. 885 if ((Cond == ISD::SETEQ || Cond == ISD::SETNE) && 886 VT == N1.getValueType() && N1.getOpcode() == ISD::AND) 887 if (ConstantSDNode *AndRHS = 888 dyn_cast<ConstantSDNode>(N1.getOperand(1))) { 889 if (Cond == ISD::SETNE && C2 == 0) {// (X & 8) != 0 --> (X & 8) >> 3 890 // Perform the xform if the AND RHS is a single bit. 891 if ((AndRHS->getValue() & (AndRHS->getValue()-1)) == 0) { 892 return getNode(ISD::SRL, VT, N1, 893 getConstant(Log2_64(AndRHS->getValue()), 894 TLI.getShiftAmountTy())); 895 } 896 } else if (Cond == ISD::SETEQ && C2 == AndRHS->getValue()) { 897 // (X & 8) == 8 --> (X & 8) >> 3 898 // Perform the xform if C2 is a single bit. 899 if ((C2 & (C2-1)) == 0) { 900 return getNode(ISD::SRL, VT, N1, 901 getConstant(Log2_64(C2),TLI.getShiftAmountTy())); 902 } 903 } 904 } 905 } 906 } else if (isa<ConstantSDNode>(N1.Val)) { 907 // Ensure that the constant occurs on the RHS. 908 return getSetCC(VT, N2, N1, ISD::getSetCCSwappedOperands(Cond)); 909 } 910 911 if (ConstantFPSDNode *N1C = dyn_cast<ConstantFPSDNode>(N1.Val)) 912 if (ConstantFPSDNode *N2C = dyn_cast<ConstantFPSDNode>(N2.Val)) { 913 double C1 = N1C->getValue(), C2 = N2C->getValue(); 914 915 switch (Cond) { 916 default: break; // FIXME: Implement the rest of these! 917 case ISD::SETEQ: return getConstant(C1 == C2, VT); 918 case ISD::SETNE: return getConstant(C1 != C2, VT); 919 case ISD::SETLT: return getConstant(C1 < C2, VT); 920 case ISD::SETGT: return getConstant(C1 > C2, VT); 921 case ISD::SETLE: return getConstant(C1 <= C2, VT); 922 case ISD::SETGE: return getConstant(C1 >= C2, VT); 923 } 924 } else { 925 // Ensure that the constant occurs on the RHS. 926 return getSetCC(VT, N2, N1, ISD::getSetCCSwappedOperands(Cond)); 927 } 928 929 // Could not fold it. 930 return SDOperand(); 931} 932 933/// getNode - Gets or creates the specified node. 934/// 935SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT) { 936 SDNode *&N = NullaryOps[std::make_pair(Opcode, VT)]; 937 if (!N) { 938 N = new SDNode(Opcode, VT); 939 AllNodes.push_back(N); 940 } 941 return SDOperand(N, 0); 942} 943 944SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 945 SDOperand Operand) { 946 unsigned Tmp1; 947 // Constant fold unary operations with an integer constant operand. 948 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Operand.Val)) { 949 uint64_t Val = C->getValue(); 950 switch (Opcode) { 951 default: break; 952 case ISD::SIGN_EXTEND: return getConstant(C->getSignExtended(), VT); 953 case ISD::ANY_EXTEND: 954 case ISD::ZERO_EXTEND: return getConstant(Val, VT); 955 case ISD::TRUNCATE: return getConstant(Val, VT); 956 case ISD::SINT_TO_FP: return getConstantFP(C->getSignExtended(), VT); 957 case ISD::UINT_TO_FP: return getConstantFP(C->getValue(), VT); 958 case ISD::BIT_CONVERT: 959 if (VT == MVT::f32) { 960 assert(C->getValueType(0) == MVT::i32 && "Invalid bit_convert!"); 961 return getConstantFP(BitsToFloat(Val), VT); 962 } else if (VT == MVT::f64) { 963 assert(C->getValueType(0) == MVT::i64 && "Invalid bit_convert!"); 964 return getConstantFP(BitsToDouble(Val), VT); 965 } 966 break; 967 case ISD::BSWAP: 968 switch(VT) { 969 default: assert(0 && "Invalid bswap!"); break; 970 case MVT::i16: return getConstant(ByteSwap_16((unsigned short)Val), VT); 971 case MVT::i32: return getConstant(ByteSwap_32((unsigned)Val), VT); 972 case MVT::i64: return getConstant(ByteSwap_64(Val), VT); 973 } 974 break; 975 case ISD::CTPOP: 976 switch(VT) { 977 default: assert(0 && "Invalid ctpop!"); break; 978 case MVT::i1: return getConstant(Val != 0, VT); 979 case MVT::i8: 980 Tmp1 = (unsigned)Val & 0xFF; 981 return getConstant(CountPopulation_32(Tmp1), VT); 982 case MVT::i16: 983 Tmp1 = (unsigned)Val & 0xFFFF; 984 return getConstant(CountPopulation_32(Tmp1), VT); 985 case MVT::i32: 986 return getConstant(CountPopulation_32((unsigned)Val), VT); 987 case MVT::i64: 988 return getConstant(CountPopulation_64(Val), VT); 989 } 990 case ISD::CTLZ: 991 switch(VT) { 992 default: assert(0 && "Invalid ctlz!"); break; 993 case MVT::i1: return getConstant(Val == 0, VT); 994 case MVT::i8: 995 Tmp1 = (unsigned)Val & 0xFF; 996 return getConstant(CountLeadingZeros_32(Tmp1)-24, VT); 997 case MVT::i16: 998 Tmp1 = (unsigned)Val & 0xFFFF; 999 return getConstant(CountLeadingZeros_32(Tmp1)-16, VT); 1000 case MVT::i32: 1001 return getConstant(CountLeadingZeros_32((unsigned)Val), VT); 1002 case MVT::i64: 1003 return getConstant(CountLeadingZeros_64(Val), VT); 1004 } 1005 case ISD::CTTZ: 1006 switch(VT) { 1007 default: assert(0 && "Invalid cttz!"); break; 1008 case MVT::i1: return getConstant(Val == 0, VT); 1009 case MVT::i8: 1010 Tmp1 = (unsigned)Val | 0x100; 1011 return getConstant(CountTrailingZeros_32(Tmp1), VT); 1012 case MVT::i16: 1013 Tmp1 = (unsigned)Val | 0x10000; 1014 return getConstant(CountTrailingZeros_32(Tmp1), VT); 1015 case MVT::i32: 1016 return getConstant(CountTrailingZeros_32((unsigned)Val), VT); 1017 case MVT::i64: 1018 return getConstant(CountTrailingZeros_64(Val), VT); 1019 } 1020 } 1021 } 1022 1023 // Constant fold unary operations with an floating point constant operand. 1024 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(Operand.Val)) 1025 switch (Opcode) { 1026 case ISD::FNEG: 1027 return getConstantFP(-C->getValue(), VT); 1028 case ISD::FABS: 1029 return getConstantFP(fabs(C->getValue()), VT); 1030 case ISD::FP_ROUND: 1031 case ISD::FP_EXTEND: 1032 return getConstantFP(C->getValue(), VT); 1033 case ISD::FP_TO_SINT: 1034 return getConstant((int64_t)C->getValue(), VT); 1035 case ISD::FP_TO_UINT: 1036 return getConstant((uint64_t)C->getValue(), VT); 1037 case ISD::BIT_CONVERT: 1038 if (VT == MVT::i32) { 1039 assert(C->getValueType(0) == MVT::f32 && "Invalid bit_convert!"); 1040 return getConstant(FloatToBits(C->getValue()), VT); 1041 } else if (VT == MVT::i64) { 1042 assert(C->getValueType(0) == MVT::f64 && "Invalid bit_convert!"); 1043 return getConstant(DoubleToBits(C->getValue()), VT); 1044 } 1045 break; 1046 } 1047 1048 unsigned OpOpcode = Operand.Val->getOpcode(); 1049 switch (Opcode) { 1050 case ISD::TokenFactor: 1051 return Operand; // Factor of one node? No factor. 1052 case ISD::SIGN_EXTEND: 1053 if (Operand.getValueType() == VT) return Operand; // noop extension 1054 assert(Operand.getValueType() < VT && "Invalid sext node, dst < src!"); 1055 if (OpOpcode == ISD::SIGN_EXTEND || OpOpcode == ISD::ZERO_EXTEND) 1056 return getNode(OpOpcode, VT, Operand.Val->getOperand(0)); 1057 break; 1058 case ISD::ZERO_EXTEND: 1059 if (Operand.getValueType() == VT) return Operand; // noop extension 1060 assert(Operand.getValueType() < VT && "Invalid zext node, dst < src!"); 1061 if (OpOpcode == ISD::ZERO_EXTEND) // (zext (zext x)) -> (zext x) 1062 return getNode(ISD::ZERO_EXTEND, VT, Operand.Val->getOperand(0)); 1063 break; 1064 case ISD::ANY_EXTEND: 1065 if (Operand.getValueType() == VT) return Operand; // noop extension 1066 assert(Operand.getValueType() < VT && "Invalid anyext node, dst < src!"); 1067 if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND) 1068 // (ext (zext x)) -> (zext x) and (ext (sext x)) -> (sext x) 1069 return getNode(OpOpcode, VT, Operand.Val->getOperand(0)); 1070 break; 1071 case ISD::TRUNCATE: 1072 if (Operand.getValueType() == VT) return Operand; // noop truncate 1073 assert(Operand.getValueType() > VT && "Invalid truncate node, src < dst!"); 1074 if (OpOpcode == ISD::TRUNCATE) 1075 return getNode(ISD::TRUNCATE, VT, Operand.Val->getOperand(0)); 1076 else if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND || 1077 OpOpcode == ISD::ANY_EXTEND) { 1078 // If the source is smaller than the dest, we still need an extend. 1079 if (Operand.Val->getOperand(0).getValueType() < VT) 1080 return getNode(OpOpcode, VT, Operand.Val->getOperand(0)); 1081 else if (Operand.Val->getOperand(0).getValueType() > VT) 1082 return getNode(ISD::TRUNCATE, VT, Operand.Val->getOperand(0)); 1083 else 1084 return Operand.Val->getOperand(0); 1085 } 1086 break; 1087 case ISD::BIT_CONVERT: 1088 // Basic sanity checking. 1089 assert(MVT::getSizeInBits(VT) == MVT::getSizeInBits(Operand.getValueType()) 1090 && "Cannot BIT_CONVERT between two different types!"); 1091 if (VT == Operand.getValueType()) return Operand; // noop conversion. 1092 if (OpOpcode == ISD::BIT_CONVERT) // bitconv(bitconv(x)) -> bitconv(x) 1093 return getNode(ISD::BIT_CONVERT, VT, Operand.getOperand(0)); 1094 break; 1095 case ISD::SCALAR_TO_VECTOR: 1096 assert(MVT::isVector(VT) && !MVT::isVector(Operand.getValueType()) && 1097 MVT::getVectorBaseType(VT) == Operand.getValueType() && 1098 "Illegal SCALAR_TO_VECTOR node!"); 1099 break; 1100 case ISD::FNEG: 1101 if (OpOpcode == ISD::FSUB) // -(X-Y) -> (Y-X) 1102 return getNode(ISD::FSUB, VT, Operand.Val->getOperand(1), 1103 Operand.Val->getOperand(0)); 1104 if (OpOpcode == ISD::FNEG) // --X -> X 1105 return Operand.Val->getOperand(0); 1106 break; 1107 case ISD::FABS: 1108 if (OpOpcode == ISD::FNEG) // abs(-X) -> abs(X) 1109 return getNode(ISD::FABS, VT, Operand.Val->getOperand(0)); 1110 break; 1111 } 1112 1113 SDNode *N; 1114 if (VT != MVT::Flag) { // Don't CSE flag producing nodes 1115 SDNode *&E = UnaryOps[std::make_pair(Opcode, std::make_pair(Operand, VT))]; 1116 if (E) return SDOperand(E, 0); 1117 E = N = new SDNode(Opcode, Operand); 1118 } else { 1119 N = new SDNode(Opcode, Operand); 1120 } 1121 N->setValueTypes(VT); 1122 AllNodes.push_back(N); 1123 return SDOperand(N, 0); 1124} 1125 1126 1127 1128SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 1129 SDOperand N1, SDOperand N2) { 1130#ifndef NDEBUG 1131 switch (Opcode) { 1132 case ISD::TokenFactor: 1133 assert(VT == MVT::Other && N1.getValueType() == MVT::Other && 1134 N2.getValueType() == MVT::Other && "Invalid token factor!"); 1135 break; 1136 case ISD::AND: 1137 case ISD::OR: 1138 case ISD::XOR: 1139 case ISD::UDIV: 1140 case ISD::UREM: 1141 case ISD::MULHU: 1142 case ISD::MULHS: 1143 assert(MVT::isInteger(VT) && "This operator does not apply to FP types!"); 1144 // fall through 1145 case ISD::ADD: 1146 case ISD::SUB: 1147 case ISD::MUL: 1148 case ISD::SDIV: 1149 case ISD::SREM: 1150 assert(MVT::isInteger(N1.getValueType()) && "Should use F* for FP ops"); 1151 // fall through. 1152 case ISD::FADD: 1153 case ISD::FSUB: 1154 case ISD::FMUL: 1155 case ISD::FDIV: 1156 case ISD::FREM: 1157 assert(N1.getValueType() == N2.getValueType() && 1158 N1.getValueType() == VT && "Binary operator types must match!"); 1159 break; 1160 case ISD::FCOPYSIGN: // N1 and result must match. N1/N2 need not match. 1161 assert(N1.getValueType() == VT && 1162 MVT::isFloatingPoint(N1.getValueType()) && 1163 MVT::isFloatingPoint(N2.getValueType()) && 1164 "Invalid FCOPYSIGN!"); 1165 break; 1166 case ISD::SHL: 1167 case ISD::SRA: 1168 case ISD::SRL: 1169 case ISD::ROTL: 1170 case ISD::ROTR: 1171 assert(VT == N1.getValueType() && 1172 "Shift operators return type must be the same as their first arg"); 1173 assert(MVT::isInteger(VT) && MVT::isInteger(N2.getValueType()) && 1174 VT != MVT::i1 && "Shifts only work on integers"); 1175 break; 1176 case ISD::FP_ROUND_INREG: { 1177 MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT(); 1178 assert(VT == N1.getValueType() && "Not an inreg round!"); 1179 assert(MVT::isFloatingPoint(VT) && MVT::isFloatingPoint(EVT) && 1180 "Cannot FP_ROUND_INREG integer types"); 1181 assert(EVT <= VT && "Not rounding down!"); 1182 break; 1183 } 1184 case ISD::AssertSext: 1185 case ISD::AssertZext: 1186 case ISD::SIGN_EXTEND_INREG: { 1187 MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT(); 1188 assert(VT == N1.getValueType() && "Not an inreg extend!"); 1189 assert(MVT::isInteger(VT) && MVT::isInteger(EVT) && 1190 "Cannot *_EXTEND_INREG FP types"); 1191 assert(EVT <= VT && "Not extending!"); 1192 } 1193 1194 default: break; 1195 } 1196#endif 1197 1198 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val); 1199 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val); 1200 if (N1C) { 1201 if (N2C) { 1202 uint64_t C1 = N1C->getValue(), C2 = N2C->getValue(); 1203 switch (Opcode) { 1204 case ISD::ADD: return getConstant(C1 + C2, VT); 1205 case ISD::SUB: return getConstant(C1 - C2, VT); 1206 case ISD::MUL: return getConstant(C1 * C2, VT); 1207 case ISD::UDIV: 1208 if (C2) return getConstant(C1 / C2, VT); 1209 break; 1210 case ISD::UREM : 1211 if (C2) return getConstant(C1 % C2, VT); 1212 break; 1213 case ISD::SDIV : 1214 if (C2) return getConstant(N1C->getSignExtended() / 1215 N2C->getSignExtended(), VT); 1216 break; 1217 case ISD::SREM : 1218 if (C2) return getConstant(N1C->getSignExtended() % 1219 N2C->getSignExtended(), VT); 1220 break; 1221 case ISD::AND : return getConstant(C1 & C2, VT); 1222 case ISD::OR : return getConstant(C1 | C2, VT); 1223 case ISD::XOR : return getConstant(C1 ^ C2, VT); 1224 case ISD::SHL : return getConstant(C1 << C2, VT); 1225 case ISD::SRL : return getConstant(C1 >> C2, VT); 1226 case ISD::SRA : return getConstant(N1C->getSignExtended() >>(int)C2, VT); 1227 case ISD::ROTL : 1228 return getConstant((C1 << C2) | (C1 >> (MVT::getSizeInBits(VT) - C2)), 1229 VT); 1230 case ISD::ROTR : 1231 return getConstant((C1 >> C2) | (C1 << (MVT::getSizeInBits(VT) - C2)), 1232 VT); 1233 default: break; 1234 } 1235 } else { // Cannonicalize constant to RHS if commutative 1236 if (isCommutativeBinOp(Opcode)) { 1237 std::swap(N1C, N2C); 1238 std::swap(N1, N2); 1239 } 1240 } 1241 } 1242 1243 ConstantFPSDNode *N1CFP = dyn_cast<ConstantFPSDNode>(N1.Val); 1244 ConstantFPSDNode *N2CFP = dyn_cast<ConstantFPSDNode>(N2.Val); 1245 if (N1CFP) { 1246 if (N2CFP) { 1247 double C1 = N1CFP->getValue(), C2 = N2CFP->getValue(); 1248 switch (Opcode) { 1249 case ISD::FADD: return getConstantFP(C1 + C2, VT); 1250 case ISD::FSUB: return getConstantFP(C1 - C2, VT); 1251 case ISD::FMUL: return getConstantFP(C1 * C2, VT); 1252 case ISD::FDIV: 1253 if (C2) return getConstantFP(C1 / C2, VT); 1254 break; 1255 case ISD::FREM : 1256 if (C2) return getConstantFP(fmod(C1, C2), VT); 1257 break; 1258 case ISD::FCOPYSIGN: { 1259 union { 1260 double F; 1261 uint64_t I; 1262 } u1; 1263 union { 1264 double F; 1265 int64_t I; 1266 } u2; 1267 u1.F = C1; 1268 u2.F = C2; 1269 if (u2.I < 0) // Sign bit of RHS set? 1270 u1.I |= 1ULL << 63; // Set the sign bit of the LHS. 1271 else 1272 u1.I &= (1ULL << 63)-1; // Clear the sign bit of the LHS. 1273 return getConstantFP(u1.F, VT); 1274 } 1275 default: break; 1276 } 1277 } else { // Cannonicalize constant to RHS if commutative 1278 if (isCommutativeBinOp(Opcode)) { 1279 std::swap(N1CFP, N2CFP); 1280 std::swap(N1, N2); 1281 } 1282 } 1283 } 1284 1285 // Finally, fold operations that do not require constants. 1286 switch (Opcode) { 1287 case ISD::FP_ROUND_INREG: 1288 if (cast<VTSDNode>(N2)->getVT() == VT) return N1; // Not actually rounding. 1289 break; 1290 case ISD::SIGN_EXTEND_INREG: { 1291 MVT::ValueType EVT = cast<VTSDNode>(N2)->getVT(); 1292 if (EVT == VT) return N1; // Not actually extending 1293 break; 1294 } 1295 1296 // FIXME: figure out how to safely handle things like 1297 // int foo(int x) { return 1 << (x & 255); } 1298 // int bar() { return foo(256); } 1299#if 0 1300 case ISD::SHL: 1301 case ISD::SRL: 1302 case ISD::SRA: 1303 if (N2.getOpcode() == ISD::SIGN_EXTEND_INREG && 1304 cast<VTSDNode>(N2.getOperand(1))->getVT() != MVT::i1) 1305 return getNode(Opcode, VT, N1, N2.getOperand(0)); 1306 else if (N2.getOpcode() == ISD::AND) 1307 if (ConstantSDNode *AndRHS = dyn_cast<ConstantSDNode>(N2.getOperand(1))) { 1308 // If the and is only masking out bits that cannot effect the shift, 1309 // eliminate the and. 1310 unsigned NumBits = MVT::getSizeInBits(VT); 1311 if ((AndRHS->getValue() & (NumBits-1)) == NumBits-1) 1312 return getNode(Opcode, VT, N1, N2.getOperand(0)); 1313 } 1314 break; 1315#endif 1316 } 1317 1318 // Memoize this node if possible. 1319 SDNode *N; 1320 if (VT != MVT::Flag) { 1321 SDNode *&BON = BinaryOps[std::make_pair(Opcode, std::make_pair(N1, N2))]; 1322 if (BON) return SDOperand(BON, 0); 1323 1324 BON = N = new SDNode(Opcode, N1, N2); 1325 } else { 1326 N = new SDNode(Opcode, N1, N2); 1327 } 1328 1329 N->setValueTypes(VT); 1330 AllNodes.push_back(N); 1331 return SDOperand(N, 0); 1332} 1333 1334SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 1335 SDOperand N1, SDOperand N2, SDOperand N3) { 1336 // Perform various simplifications. 1337 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val); 1338 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val); 1339 ConstantSDNode *N3C = dyn_cast<ConstantSDNode>(N3.Val); 1340 switch (Opcode) { 1341 case ISD::SETCC: { 1342 // Use SimplifySetCC to simplify SETCC's. 1343 SDOperand Simp = SimplifySetCC(VT, N1, N2, cast<CondCodeSDNode>(N3)->get()); 1344 if (Simp.Val) return Simp; 1345 break; 1346 } 1347 case ISD::SELECT: 1348 if (N1C) 1349 if (N1C->getValue()) 1350 return N2; // select true, X, Y -> X 1351 else 1352 return N3; // select false, X, Y -> Y 1353 1354 if (N2 == N3) return N2; // select C, X, X -> X 1355 break; 1356 case ISD::BRCOND: 1357 if (N2C) 1358 if (N2C->getValue()) // Unconditional branch 1359 return getNode(ISD::BR, MVT::Other, N1, N3); 1360 else 1361 return N1; // Never-taken branch 1362 break; 1363 case ISD::VECTOR_SHUFFLE: 1364 assert(VT == N1.getValueType() && VT == N2.getValueType() && 1365 MVT::isVector(VT) && MVT::isVector(N3.getValueType()) && 1366 N3.getOpcode() == ISD::BUILD_VECTOR && 1367 MVT::getVectorNumElements(VT) == N3.getNumOperands() && 1368 "Illegal VECTOR_SHUFFLE node!"); 1369 break; 1370 } 1371 1372 std::vector<SDOperand> Ops; 1373 Ops.reserve(3); 1374 Ops.push_back(N1); 1375 Ops.push_back(N2); 1376 Ops.push_back(N3); 1377 1378 // Memoize node if it doesn't produce a flag. 1379 SDNode *N; 1380 if (VT != MVT::Flag) { 1381 SDNode *&E = OneResultNodes[std::make_pair(Opcode,std::make_pair(VT, Ops))]; 1382 if (E) return SDOperand(E, 0); 1383 E = N = new SDNode(Opcode, N1, N2, N3); 1384 } else { 1385 N = new SDNode(Opcode, N1, N2, N3); 1386 } 1387 N->setValueTypes(VT); 1388 AllNodes.push_back(N); 1389 return SDOperand(N, 0); 1390} 1391 1392SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 1393 SDOperand N1, SDOperand N2, SDOperand N3, 1394 SDOperand N4) { 1395 std::vector<SDOperand> Ops; 1396 Ops.reserve(4); 1397 Ops.push_back(N1); 1398 Ops.push_back(N2); 1399 Ops.push_back(N3); 1400 Ops.push_back(N4); 1401 return getNode(Opcode, VT, Ops); 1402} 1403 1404SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 1405 SDOperand N1, SDOperand N2, SDOperand N3, 1406 SDOperand N4, SDOperand N5) { 1407 std::vector<SDOperand> Ops; 1408 Ops.reserve(5); 1409 Ops.push_back(N1); 1410 Ops.push_back(N2); 1411 Ops.push_back(N3); 1412 Ops.push_back(N4); 1413 Ops.push_back(N5); 1414 return getNode(Opcode, VT, Ops); 1415} 1416 1417SDOperand SelectionDAG::getLoad(MVT::ValueType VT, 1418 SDOperand Chain, SDOperand Ptr, 1419 SDOperand SV) { 1420 SDNode *&N = Loads[std::make_pair(Ptr, std::make_pair(Chain, VT))]; 1421 if (N) return SDOperand(N, 0); 1422 N = new SDNode(ISD::LOAD, Chain, Ptr, SV); 1423 1424 // Loads have a token chain. 1425 setNodeValueTypes(N, VT, MVT::Other); 1426 AllNodes.push_back(N); 1427 return SDOperand(N, 0); 1428} 1429 1430SDOperand SelectionDAG::getVecLoad(unsigned Count, MVT::ValueType EVT, 1431 SDOperand Chain, SDOperand Ptr, 1432 SDOperand SV) { 1433 SDNode *&N = Loads[std::make_pair(Ptr, std::make_pair(Chain, EVT))]; 1434 if (N) return SDOperand(N, 0); 1435 std::vector<SDOperand> Ops; 1436 Ops.reserve(5); 1437 Ops.push_back(Chain); 1438 Ops.push_back(Ptr); 1439 Ops.push_back(SV); 1440 Ops.push_back(getConstant(Count, MVT::i32)); 1441 Ops.push_back(getValueType(EVT)); 1442 std::vector<MVT::ValueType> VTs; 1443 VTs.reserve(2); 1444 VTs.push_back(MVT::Vector); VTs.push_back(MVT::Other); // Add token chain. 1445 return getNode(ISD::VLOAD, VTs, Ops); 1446} 1447 1448SDOperand SelectionDAG::getExtLoad(unsigned Opcode, MVT::ValueType VT, 1449 SDOperand Chain, SDOperand Ptr, SDOperand SV, 1450 MVT::ValueType EVT) { 1451 std::vector<SDOperand> Ops; 1452 Ops.reserve(4); 1453 Ops.push_back(Chain); 1454 Ops.push_back(Ptr); 1455 Ops.push_back(SV); 1456 Ops.push_back(getValueType(EVT)); 1457 std::vector<MVT::ValueType> VTs; 1458 VTs.reserve(2); 1459 VTs.push_back(VT); VTs.push_back(MVT::Other); // Add token chain. 1460 return getNode(Opcode, VTs, Ops); 1461} 1462 1463SDOperand SelectionDAG::getSrcValue(const Value *V, int Offset) { 1464 assert((!V || isa<PointerType>(V->getType())) && 1465 "SrcValue is not a pointer?"); 1466 SDNode *&N = ValueNodes[std::make_pair(V, Offset)]; 1467 if (N) return SDOperand(N, 0); 1468 1469 N = new SrcValueSDNode(V, Offset); 1470 AllNodes.push_back(N); 1471 return SDOperand(N, 0); 1472} 1473 1474SDOperand SelectionDAG::getVAArg(MVT::ValueType VT, 1475 SDOperand Chain, SDOperand Ptr, 1476 SDOperand SV) { 1477 std::vector<SDOperand> Ops; 1478 Ops.reserve(3); 1479 Ops.push_back(Chain); 1480 Ops.push_back(Ptr); 1481 Ops.push_back(SV); 1482 std::vector<MVT::ValueType> VTs; 1483 VTs.reserve(2); 1484 VTs.push_back(VT); VTs.push_back(MVT::Other); // Add token chain. 1485 return getNode(ISD::VAARG, VTs, Ops); 1486} 1487 1488SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, 1489 std::vector<SDOperand> &Ops) { 1490 switch (Ops.size()) { 1491 case 0: return getNode(Opcode, VT); 1492 case 1: return getNode(Opcode, VT, Ops[0]); 1493 case 2: return getNode(Opcode, VT, Ops[0], Ops[1]); 1494 case 3: return getNode(Opcode, VT, Ops[0], Ops[1], Ops[2]); 1495 default: break; 1496 } 1497 1498 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Ops[1].Val); 1499 switch (Opcode) { 1500 default: break; 1501 case ISD::TRUNCSTORE: { 1502 assert(Ops.size() == 5 && "TRUNCSTORE takes 5 operands!"); 1503 MVT::ValueType EVT = cast<VTSDNode>(Ops[4])->getVT(); 1504#if 0 // FIXME: If the target supports EVT natively, convert to a truncate/store 1505 // If this is a truncating store of a constant, convert to the desired type 1506 // and store it instead. 1507 if (isa<Constant>(Ops[0])) { 1508 SDOperand Op = getNode(ISD::TRUNCATE, EVT, N1); 1509 if (isa<Constant>(Op)) 1510 N1 = Op; 1511 } 1512 // Also for ConstantFP? 1513#endif 1514 if (Ops[0].getValueType() == EVT) // Normal store? 1515 return getNode(ISD::STORE, VT, Ops[0], Ops[1], Ops[2], Ops[3]); 1516 assert(Ops[1].getValueType() > EVT && "Not a truncation?"); 1517 assert(MVT::isInteger(Ops[1].getValueType()) == MVT::isInteger(EVT) && 1518 "Can't do FP-INT conversion!"); 1519 break; 1520 } 1521 case ISD::SELECT_CC: { 1522 assert(Ops.size() == 5 && "SELECT_CC takes 5 operands!"); 1523 assert(Ops[0].getValueType() == Ops[1].getValueType() && 1524 "LHS and RHS of condition must have same type!"); 1525 assert(Ops[2].getValueType() == Ops[3].getValueType() && 1526 "True and False arms of SelectCC must have same type!"); 1527 assert(Ops[2].getValueType() == VT && 1528 "select_cc node must be of same type as true and false value!"); 1529 break; 1530 } 1531 case ISD::BR_CC: { 1532 assert(Ops.size() == 5 && "BR_CC takes 5 operands!"); 1533 assert(Ops[2].getValueType() == Ops[3].getValueType() && 1534 "LHS/RHS of comparison should match types!"); 1535 break; 1536 } 1537 } 1538 1539 // Memoize nodes. 1540 SDNode *N; 1541 if (VT != MVT::Flag) { 1542 SDNode *&E = 1543 OneResultNodes[std::make_pair(Opcode, std::make_pair(VT, Ops))]; 1544 if (E) return SDOperand(E, 0); 1545 E = N = new SDNode(Opcode, Ops); 1546 } else { 1547 N = new SDNode(Opcode, Ops); 1548 } 1549 N->setValueTypes(VT); 1550 AllNodes.push_back(N); 1551 return SDOperand(N, 0); 1552} 1553 1554SDOperand SelectionDAG::getNode(unsigned Opcode, 1555 std::vector<MVT::ValueType> &ResultTys, 1556 std::vector<SDOperand> &Ops) { 1557 if (ResultTys.size() == 1) 1558 return getNode(Opcode, ResultTys[0], Ops); 1559 1560 switch (Opcode) { 1561 case ISD::EXTLOAD: 1562 case ISD::SEXTLOAD: 1563 case ISD::ZEXTLOAD: { 1564 MVT::ValueType EVT = cast<VTSDNode>(Ops[3])->getVT(); 1565 assert(Ops.size() == 4 && ResultTys.size() == 2 && "Bad *EXTLOAD!"); 1566 // If they are asking for an extending load from/to the same thing, return a 1567 // normal load. 1568 if (ResultTys[0] == EVT) 1569 return getLoad(ResultTys[0], Ops[0], Ops[1], Ops[2]); 1570 if (MVT::isVector(ResultTys[0])) { 1571 assert(EVT == MVT::getVectorBaseType(ResultTys[0]) && 1572 "Invalid vector extload!"); 1573 } else { 1574 assert(EVT < ResultTys[0] && 1575 "Should only be an extending load, not truncating!"); 1576 } 1577 assert((Opcode == ISD::EXTLOAD || MVT::isInteger(ResultTys[0])) && 1578 "Cannot sign/zero extend a FP/Vector load!"); 1579 assert(MVT::isInteger(ResultTys[0]) == MVT::isInteger(EVT) && 1580 "Cannot convert from FP to Int or Int -> FP!"); 1581 break; 1582 } 1583 1584 // FIXME: figure out how to safely handle things like 1585 // int foo(int x) { return 1 << (x & 255); } 1586 // int bar() { return foo(256); } 1587#if 0 1588 case ISD::SRA_PARTS: 1589 case ISD::SRL_PARTS: 1590 case ISD::SHL_PARTS: 1591 if (N3.getOpcode() == ISD::SIGN_EXTEND_INREG && 1592 cast<VTSDNode>(N3.getOperand(1))->getVT() != MVT::i1) 1593 return getNode(Opcode, VT, N1, N2, N3.getOperand(0)); 1594 else if (N3.getOpcode() == ISD::AND) 1595 if (ConstantSDNode *AndRHS = dyn_cast<ConstantSDNode>(N3.getOperand(1))) { 1596 // If the and is only masking out bits that cannot effect the shift, 1597 // eliminate the and. 1598 unsigned NumBits = MVT::getSizeInBits(VT)*2; 1599 if ((AndRHS->getValue() & (NumBits-1)) == NumBits-1) 1600 return getNode(Opcode, VT, N1, N2, N3.getOperand(0)); 1601 } 1602 break; 1603#endif 1604 } 1605 1606 // Memoize the node unless it returns a flag. 1607 SDNode *N; 1608 if (ResultTys.back() != MVT::Flag) { 1609 SDNode *&E = 1610 ArbitraryNodes[std::make_pair(Opcode, std::make_pair(ResultTys, Ops))]; 1611 if (E) return SDOperand(E, 0); 1612 E = N = new SDNode(Opcode, Ops); 1613 } else { 1614 N = new SDNode(Opcode, Ops); 1615 } 1616 setNodeValueTypes(N, ResultTys); 1617 AllNodes.push_back(N); 1618 return SDOperand(N, 0); 1619} 1620 1621void SelectionDAG::setNodeValueTypes(SDNode *N, 1622 std::vector<MVT::ValueType> &RetVals) { 1623 switch (RetVals.size()) { 1624 case 0: return; 1625 case 1: N->setValueTypes(RetVals[0]); return; 1626 case 2: setNodeValueTypes(N, RetVals[0], RetVals[1]); return; 1627 default: break; 1628 } 1629 1630 std::list<std::vector<MVT::ValueType> >::iterator I = 1631 std::find(VTList.begin(), VTList.end(), RetVals); 1632 if (I == VTList.end()) { 1633 VTList.push_front(RetVals); 1634 I = VTList.begin(); 1635 } 1636 1637 N->setValueTypes(&(*I)[0], I->size()); 1638} 1639 1640void SelectionDAG::setNodeValueTypes(SDNode *N, MVT::ValueType VT1, 1641 MVT::ValueType VT2) { 1642 for (std::list<std::vector<MVT::ValueType> >::iterator I = VTList.begin(), 1643 E = VTList.end(); I != E; ++I) { 1644 if (I->size() == 2 && (*I)[0] == VT1 && (*I)[1] == VT2) { 1645 N->setValueTypes(&(*I)[0], 2); 1646 return; 1647 } 1648 } 1649 std::vector<MVT::ValueType> V; 1650 V.push_back(VT1); 1651 V.push_back(VT2); 1652 VTList.push_front(V); 1653 N->setValueTypes(&(*VTList.begin())[0], 2); 1654} 1655 1656/// UpdateNodeOperands - *Mutate* the specified node in-place to have the 1657/// specified operands. If the resultant node already exists in the DAG, 1658/// this does not modify the specified node, instead it returns the node that 1659/// already exists. If the resultant node does not exist in the DAG, the 1660/// input node is returned. As a degenerate case, if you specify the same 1661/// input operands as the node already has, the input node is returned. 1662SDOperand SelectionDAG:: 1663UpdateNodeOperands(SDOperand InN, SDOperand Op) { 1664 SDNode *N = InN.Val; 1665 assert(N->getNumOperands() == 1 && "Update with wrong number of operands"); 1666 1667 // Check to see if there is no change. 1668 if (Op == N->getOperand(0)) return InN; 1669 1670 // See if the modified node already exists. 1671 SDNode **NewSlot = FindModifiedNodeSlot(N, Op); 1672 if (NewSlot && *NewSlot) 1673 return SDOperand(*NewSlot, InN.ResNo); 1674 1675 // Nope it doesn't. Remove the node from it's current place in the maps. 1676 if (NewSlot) 1677 RemoveNodeFromCSEMaps(N); 1678 1679 // Now we update the operands. 1680 N->OperandList[0].Val->removeUser(N); 1681 Op.Val->addUser(N); 1682 N->OperandList[0] = Op; 1683 1684 // If this gets put into a CSE map, add it. 1685 if (NewSlot) *NewSlot = N; 1686 return InN; 1687} 1688 1689SDOperand SelectionDAG:: 1690UpdateNodeOperands(SDOperand InN, SDOperand Op1, SDOperand Op2) { 1691 SDNode *N = InN.Val; 1692 assert(N->getNumOperands() == 2 && "Update with wrong number of operands"); 1693 1694 // Check to see if there is no change. 1695 bool AnyChange = false; 1696 if (Op1 == N->getOperand(0) && Op2 == N->getOperand(1)) 1697 return InN; // No operands changed, just return the input node. 1698 1699 // See if the modified node already exists. 1700 SDNode **NewSlot = FindModifiedNodeSlot(N, Op1, Op2); 1701 if (NewSlot && *NewSlot) 1702 return SDOperand(*NewSlot, InN.ResNo); 1703 1704 // Nope it doesn't. Remove the node from it's current place in the maps. 1705 if (NewSlot) 1706 RemoveNodeFromCSEMaps(N); 1707 1708 // Now we update the operands. 1709 if (N->OperandList[0] != Op1) { 1710 N->OperandList[0].Val->removeUser(N); 1711 Op1.Val->addUser(N); 1712 N->OperandList[0] = Op1; 1713 } 1714 if (N->OperandList[1] != Op2) { 1715 N->OperandList[1].Val->removeUser(N); 1716 Op2.Val->addUser(N); 1717 N->OperandList[1] = Op2; 1718 } 1719 1720 // If this gets put into a CSE map, add it. 1721 if (NewSlot) *NewSlot = N; 1722 return InN; 1723} 1724 1725SDOperand SelectionDAG:: 1726UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, SDOperand Op3) { 1727 std::vector<SDOperand> Ops; 1728 Ops.push_back(Op1); 1729 Ops.push_back(Op2); 1730 Ops.push_back(Op3); 1731 return UpdateNodeOperands(N, Ops); 1732} 1733 1734SDOperand SelectionDAG:: 1735UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, 1736 SDOperand Op3, SDOperand Op4) { 1737 std::vector<SDOperand> Ops; 1738 Ops.push_back(Op1); 1739 Ops.push_back(Op2); 1740 Ops.push_back(Op3); 1741 Ops.push_back(Op4); 1742 return UpdateNodeOperands(N, Ops); 1743} 1744 1745SDOperand SelectionDAG:: 1746UpdateNodeOperands(SDOperand N, SDOperand Op1, SDOperand Op2, 1747 SDOperand Op3, SDOperand Op4, SDOperand Op5) { 1748 std::vector<SDOperand> Ops; 1749 Ops.push_back(Op1); 1750 Ops.push_back(Op2); 1751 Ops.push_back(Op3); 1752 Ops.push_back(Op4); 1753 Ops.push_back(Op5); 1754 return UpdateNodeOperands(N, Ops); 1755} 1756 1757 1758SDOperand SelectionDAG:: 1759UpdateNodeOperands(SDOperand InN, const std::vector<SDOperand> &Ops) { 1760 SDNode *N = InN.Val; 1761 assert(N->getNumOperands() == Ops.size() && 1762 "Update with wrong number of operands"); 1763 1764 // Check to see if there is no change. 1765 unsigned NumOps = Ops.size(); 1766 bool AnyChange = false; 1767 for (unsigned i = 0; i != NumOps; ++i) { 1768 if (Ops[i] != N->getOperand(i)) { 1769 AnyChange = true; 1770 break; 1771 } 1772 } 1773 1774 // No operands changed, just return the input node. 1775 if (!AnyChange) return InN; 1776 1777 // See if the modified node already exists. 1778 SDNode **NewSlot = FindModifiedNodeSlot(N, Ops); 1779 if (NewSlot && *NewSlot) 1780 return SDOperand(*NewSlot, InN.ResNo); 1781 1782 // Nope it doesn't. Remove the node from it's current place in the maps. 1783 if (NewSlot) 1784 RemoveNodeFromCSEMaps(N); 1785 1786 // Now we update the operands. 1787 for (unsigned i = 0; i != NumOps; ++i) { 1788 if (N->OperandList[i] != Ops[i]) { 1789 N->OperandList[i].Val->removeUser(N); 1790 Ops[i].Val->addUser(N); 1791 N->OperandList[i] = Ops[i]; 1792 } 1793 } 1794 1795 // If this gets put into a CSE map, add it. 1796 if (NewSlot) *NewSlot = N; 1797 return InN; 1798} 1799 1800 1801 1802 1803/// SelectNodeTo - These are used for target selectors to *mutate* the 1804/// specified node to have the specified return type, Target opcode, and 1805/// operands. Note that target opcodes are stored as 1806/// ISD::BUILTIN_OP_END+TargetOpcode in the node opcode field. 1807/// 1808/// Note that SelectNodeTo returns the resultant node. If there is already a 1809/// node of the specified opcode and operands, it returns that node instead of 1810/// the current one. 1811SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 1812 MVT::ValueType VT) { 1813 // If an identical node already exists, use it. 1814 SDNode *&ON = NullaryOps[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, VT)]; 1815 if (ON) return SDOperand(ON, 0); 1816 1817 RemoveNodeFromCSEMaps(N); 1818 1819 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 1820 N->setValueTypes(VT); 1821 1822 ON = N; // Memoize the new node. 1823 return SDOperand(N, 0); 1824} 1825 1826SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 1827 MVT::ValueType VT, SDOperand Op1) { 1828 // If an identical node already exists, use it. 1829 SDNode *&ON = UnaryOps[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 1830 std::make_pair(Op1, VT))]; 1831 if (ON) return SDOperand(ON, 0); 1832 1833 RemoveNodeFromCSEMaps(N); 1834 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 1835 N->setValueTypes(VT); 1836 N->setOperands(Op1); 1837 1838 ON = N; // Memoize the new node. 1839 return SDOperand(N, 0); 1840} 1841 1842SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 1843 MVT::ValueType VT, SDOperand Op1, 1844 SDOperand Op2) { 1845 // If an identical node already exists, use it. 1846 SDNode *&ON = BinaryOps[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 1847 std::make_pair(Op1, Op2))]; 1848 if (ON) return SDOperand(ON, 0); 1849 1850 RemoveNodeFromCSEMaps(N); 1851 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 1852 N->setValueTypes(VT); 1853 N->setOperands(Op1, Op2); 1854 1855 ON = N; // Memoize the new node. 1856 return SDOperand(N, 0); 1857} 1858 1859SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 1860 MVT::ValueType VT, SDOperand Op1, 1861 SDOperand Op2, SDOperand Op3) { 1862 // If an identical node already exists, use it. 1863 std::vector<SDOperand> OpList; 1864 OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3); 1865 SDNode *&ON = OneResultNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 1866 std::make_pair(VT, OpList))]; 1867 if (ON) return SDOperand(ON, 0); 1868 1869 RemoveNodeFromCSEMaps(N); 1870 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 1871 N->setValueTypes(VT); 1872 N->setOperands(Op1, Op2, Op3); 1873 1874 ON = N; // Memoize the new node. 1875 return SDOperand(N, 0); 1876} 1877 1878SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 1879 MVT::ValueType VT, SDOperand Op1, 1880 SDOperand Op2, SDOperand Op3, 1881 SDOperand Op4) { 1882 // If an identical node already exists, use it. 1883 std::vector<SDOperand> OpList; 1884 OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3); 1885 OpList.push_back(Op4); 1886 SDNode *&ON = OneResultNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 1887 std::make_pair(VT, OpList))]; 1888 if (ON) return SDOperand(ON, 0); 1889 1890 RemoveNodeFromCSEMaps(N); 1891 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 1892 N->setValueTypes(VT); 1893 N->setOperands(Op1, Op2, Op3, Op4); 1894 1895 ON = N; // Memoize the new node. 1896 return SDOperand(N, 0); 1897} 1898 1899SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 1900 MVT::ValueType VT, SDOperand Op1, 1901 SDOperand Op2, SDOperand Op3,SDOperand Op4, 1902 SDOperand Op5) { 1903 // If an identical node already exists, use it. 1904 std::vector<SDOperand> OpList; 1905 OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3); 1906 OpList.push_back(Op4); OpList.push_back(Op5); 1907 SDNode *&ON = OneResultNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 1908 std::make_pair(VT, OpList))]; 1909 if (ON) return SDOperand(ON, 0); 1910 1911 RemoveNodeFromCSEMaps(N); 1912 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 1913 N->setValueTypes(VT); 1914 N->setOperands(Op1, Op2, Op3, Op4, Op5); 1915 1916 ON = N; // Memoize the new node. 1917 return SDOperand(N, 0); 1918} 1919 1920SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 1921 MVT::ValueType VT, SDOperand Op1, 1922 SDOperand Op2, SDOperand Op3,SDOperand Op4, 1923 SDOperand Op5, SDOperand Op6) { 1924 // If an identical node already exists, use it. 1925 std::vector<SDOperand> OpList; 1926 OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3); 1927 OpList.push_back(Op4); OpList.push_back(Op5); OpList.push_back(Op6); 1928 SDNode *&ON = OneResultNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 1929 std::make_pair(VT, OpList))]; 1930 if (ON) return SDOperand(ON, 0); 1931 1932 RemoveNodeFromCSEMaps(N); 1933 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 1934 N->setValueTypes(VT); 1935 N->setOperands(Op1, Op2, Op3, Op4, Op5, Op6); 1936 1937 ON = N; // Memoize the new node. 1938 return SDOperand(N, 0); 1939} 1940 1941SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 1942 MVT::ValueType VT, SDOperand Op1, 1943 SDOperand Op2, SDOperand Op3,SDOperand Op4, 1944 SDOperand Op5, SDOperand Op6, 1945 SDOperand Op7) { 1946 // If an identical node already exists, use it. 1947 std::vector<SDOperand> OpList; 1948 OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3); 1949 OpList.push_back(Op4); OpList.push_back(Op5); OpList.push_back(Op6); 1950 OpList.push_back(Op7); 1951 SDNode *&ON = OneResultNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 1952 std::make_pair(VT, OpList))]; 1953 if (ON) return SDOperand(ON, 0); 1954 1955 RemoveNodeFromCSEMaps(N); 1956 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 1957 N->setValueTypes(VT); 1958 N->setOperands(Op1, Op2, Op3, Op4, Op5, Op6, Op7); 1959 1960 ON = N; // Memoize the new node. 1961 return SDOperand(N, 0); 1962} 1963SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 1964 MVT::ValueType VT, SDOperand Op1, 1965 SDOperand Op2, SDOperand Op3,SDOperand Op4, 1966 SDOperand Op5, SDOperand Op6, 1967 SDOperand Op7, SDOperand Op8) { 1968 // If an identical node already exists, use it. 1969 std::vector<SDOperand> OpList; 1970 OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3); 1971 OpList.push_back(Op4); OpList.push_back(Op5); OpList.push_back(Op6); 1972 OpList.push_back(Op7); OpList.push_back(Op8); 1973 SDNode *&ON = OneResultNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 1974 std::make_pair(VT, OpList))]; 1975 if (ON) return SDOperand(ON, 0); 1976 1977 RemoveNodeFromCSEMaps(N); 1978 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 1979 N->setValueTypes(VT); 1980 N->setOperands(Op1, Op2, Op3, Op4, Op5, Op6, Op7, Op8); 1981 1982 ON = N; // Memoize the new node. 1983 return SDOperand(N, 0); 1984} 1985 1986SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 1987 MVT::ValueType VT1, MVT::ValueType VT2, 1988 SDOperand Op1, SDOperand Op2) { 1989 // If an identical node already exists, use it. 1990 std::vector<SDOperand> OpList; 1991 OpList.push_back(Op1); OpList.push_back(Op2); 1992 std::vector<MVT::ValueType> VTList; 1993 VTList.push_back(VT1); VTList.push_back(VT2); 1994 SDNode *&ON = ArbitraryNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 1995 std::make_pair(VTList, OpList))]; 1996 if (ON) return SDOperand(ON, 0); 1997 1998 RemoveNodeFromCSEMaps(N); 1999 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2000 setNodeValueTypes(N, VT1, VT2); 2001 N->setOperands(Op1, Op2); 2002 2003 ON = N; // Memoize the new node. 2004 return SDOperand(N, 0); 2005} 2006 2007SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 2008 MVT::ValueType VT1, MVT::ValueType VT2, 2009 SDOperand Op1, SDOperand Op2, 2010 SDOperand Op3) { 2011 // If an identical node already exists, use it. 2012 std::vector<SDOperand> OpList; 2013 OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3); 2014 std::vector<MVT::ValueType> VTList; 2015 VTList.push_back(VT1); VTList.push_back(VT2); 2016 SDNode *&ON = ArbitraryNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 2017 std::make_pair(VTList, OpList))]; 2018 if (ON) return SDOperand(ON, 0); 2019 2020 RemoveNodeFromCSEMaps(N); 2021 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2022 setNodeValueTypes(N, VT1, VT2); 2023 N->setOperands(Op1, Op2, Op3); 2024 2025 ON = N; // Memoize the new node. 2026 return SDOperand(N, 0); 2027} 2028 2029SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 2030 MVT::ValueType VT1, MVT::ValueType VT2, 2031 SDOperand Op1, SDOperand Op2, 2032 SDOperand Op3, SDOperand Op4) { 2033 // If an identical node already exists, use it. 2034 std::vector<SDOperand> OpList; 2035 OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3); 2036 OpList.push_back(Op4); 2037 std::vector<MVT::ValueType> VTList; 2038 VTList.push_back(VT1); VTList.push_back(VT2); 2039 SDNode *&ON = ArbitraryNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 2040 std::make_pair(VTList, OpList))]; 2041 if (ON) return SDOperand(ON, 0); 2042 2043 RemoveNodeFromCSEMaps(N); 2044 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2045 setNodeValueTypes(N, VT1, VT2); 2046 N->setOperands(Op1, Op2, Op3, Op4); 2047 2048 ON = N; // Memoize the new node. 2049 return SDOperand(N, 0); 2050} 2051 2052SDOperand SelectionDAG::SelectNodeTo(SDNode *N, unsigned TargetOpc, 2053 MVT::ValueType VT1, MVT::ValueType VT2, 2054 SDOperand Op1, SDOperand Op2, 2055 SDOperand Op3, SDOperand Op4, 2056 SDOperand Op5) { 2057 // If an identical node already exists, use it. 2058 std::vector<SDOperand> OpList; 2059 OpList.push_back(Op1); OpList.push_back(Op2); OpList.push_back(Op3); 2060 OpList.push_back(Op4); OpList.push_back(Op5); 2061 std::vector<MVT::ValueType> VTList; 2062 VTList.push_back(VT1); VTList.push_back(VT2); 2063 SDNode *&ON = ArbitraryNodes[std::make_pair(ISD::BUILTIN_OP_END+TargetOpc, 2064 std::make_pair(VTList, OpList))]; 2065 if (ON) return SDOperand(ON, 0); 2066 2067 RemoveNodeFromCSEMaps(N); 2068 N->MorphNodeTo(ISD::BUILTIN_OP_END+TargetOpc); 2069 setNodeValueTypes(N, VT1, VT2); 2070 N->setOperands(Op1, Op2, Op3, Op4, Op5); 2071 2072 ON = N; // Memoize the new node. 2073 return SDOperand(N, 0); 2074} 2075 2076/// getTargetNode - These are used for target selectors to create a new node 2077/// with specified return type(s), target opcode, and operands. 2078/// 2079/// Note that getTargetNode returns the resultant node. If there is already a 2080/// node of the specified opcode and operands, it returns that node instead of 2081/// the current one. 2082SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT) { 2083 return getNode(ISD::BUILTIN_OP_END+Opcode, VT).Val; 2084} 2085SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2086 SDOperand Op1) { 2087 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1).Val; 2088} 2089SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2090 SDOperand Op1, SDOperand Op2) { 2091 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2).Val; 2092} 2093SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2094 SDOperand Op1, SDOperand Op2, SDOperand Op3) { 2095 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3).Val; 2096} 2097SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2098 SDOperand Op1, SDOperand Op2, SDOperand Op3, 2099 SDOperand Op4) { 2100 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3, Op4).Val; 2101} 2102SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2103 SDOperand Op1, SDOperand Op2, SDOperand Op3, 2104 SDOperand Op4, SDOperand Op5) { 2105 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3, Op4, Op5).Val; 2106} 2107SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2108 SDOperand Op1, SDOperand Op2, SDOperand Op3, 2109 SDOperand Op4, SDOperand Op5, SDOperand Op6) { 2110 std::vector<SDOperand> Ops; 2111 Ops.reserve(6); 2112 Ops.push_back(Op1); 2113 Ops.push_back(Op2); 2114 Ops.push_back(Op3); 2115 Ops.push_back(Op4); 2116 Ops.push_back(Op5); 2117 Ops.push_back(Op6); 2118 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops).Val; 2119} 2120SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2121 SDOperand Op1, SDOperand Op2, SDOperand Op3, 2122 SDOperand Op4, SDOperand Op5, SDOperand Op6, 2123 SDOperand Op7) { 2124 std::vector<SDOperand> Ops; 2125 Ops.reserve(7); 2126 Ops.push_back(Op1); 2127 Ops.push_back(Op2); 2128 Ops.push_back(Op3); 2129 Ops.push_back(Op4); 2130 Ops.push_back(Op5); 2131 Ops.push_back(Op6); 2132 Ops.push_back(Op7); 2133 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops).Val; 2134} 2135SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2136 SDOperand Op1, SDOperand Op2, SDOperand Op3, 2137 SDOperand Op4, SDOperand Op5, SDOperand Op6, 2138 SDOperand Op7, SDOperand Op8) { 2139 std::vector<SDOperand> Ops; 2140 Ops.reserve(8); 2141 Ops.push_back(Op1); 2142 Ops.push_back(Op2); 2143 Ops.push_back(Op3); 2144 Ops.push_back(Op4); 2145 Ops.push_back(Op5); 2146 Ops.push_back(Op6); 2147 Ops.push_back(Op7); 2148 Ops.push_back(Op8); 2149 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops).Val; 2150} 2151SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT, 2152 std::vector<SDOperand> &Ops) { 2153 return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops).Val; 2154} 2155SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2156 MVT::ValueType VT2, SDOperand Op1) { 2157 std::vector<MVT::ValueType> ResultTys; 2158 ResultTys.push_back(VT1); 2159 ResultTys.push_back(VT2); 2160 std::vector<SDOperand> Ops; 2161 Ops.push_back(Op1); 2162 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2163} 2164SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2165 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2) { 2166 std::vector<MVT::ValueType> ResultTys; 2167 ResultTys.push_back(VT1); 2168 ResultTys.push_back(VT2); 2169 std::vector<SDOperand> Ops; 2170 Ops.push_back(Op1); 2171 Ops.push_back(Op2); 2172 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2173} 2174SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2175 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 2176 SDOperand Op3) { 2177 std::vector<MVT::ValueType> ResultTys; 2178 ResultTys.push_back(VT1); 2179 ResultTys.push_back(VT2); 2180 std::vector<SDOperand> Ops; 2181 Ops.push_back(Op1); 2182 Ops.push_back(Op2); 2183 Ops.push_back(Op3); 2184 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2185} 2186SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2187 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 2188 SDOperand Op3, SDOperand Op4) { 2189 std::vector<MVT::ValueType> ResultTys; 2190 ResultTys.push_back(VT1); 2191 ResultTys.push_back(VT2); 2192 std::vector<SDOperand> Ops; 2193 Ops.push_back(Op1); 2194 Ops.push_back(Op2); 2195 Ops.push_back(Op3); 2196 Ops.push_back(Op4); 2197 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2198} 2199SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2200 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 2201 SDOperand Op3, SDOperand Op4, SDOperand Op5) { 2202 std::vector<MVT::ValueType> ResultTys; 2203 ResultTys.push_back(VT1); 2204 ResultTys.push_back(VT2); 2205 std::vector<SDOperand> Ops; 2206 Ops.push_back(Op1); 2207 Ops.push_back(Op2); 2208 Ops.push_back(Op3); 2209 Ops.push_back(Op4); 2210 Ops.push_back(Op5); 2211 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2212} 2213SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2214 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 2215 SDOperand Op3, SDOperand Op4, SDOperand Op5, 2216 SDOperand Op6) { 2217 std::vector<MVT::ValueType> ResultTys; 2218 ResultTys.push_back(VT1); 2219 ResultTys.push_back(VT2); 2220 std::vector<SDOperand> Ops; 2221 Ops.push_back(Op1); 2222 Ops.push_back(Op2); 2223 Ops.push_back(Op3); 2224 Ops.push_back(Op4); 2225 Ops.push_back(Op5); 2226 Ops.push_back(Op6); 2227 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2228} 2229SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2230 MVT::ValueType VT2, SDOperand Op1, SDOperand Op2, 2231 SDOperand Op3, SDOperand Op4, SDOperand Op5, 2232 SDOperand Op6, SDOperand Op7) { 2233 std::vector<MVT::ValueType> ResultTys; 2234 ResultTys.push_back(VT1); 2235 ResultTys.push_back(VT2); 2236 std::vector<SDOperand> Ops; 2237 Ops.push_back(Op1); 2238 Ops.push_back(Op2); 2239 Ops.push_back(Op3); 2240 Ops.push_back(Op4); 2241 Ops.push_back(Op5); 2242 Ops.push_back(Op6); 2243 Ops.push_back(Op7); 2244 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2245} 2246SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2247 MVT::ValueType VT2, MVT::ValueType VT3, 2248 SDOperand Op1, SDOperand Op2) { 2249 std::vector<MVT::ValueType> ResultTys; 2250 ResultTys.push_back(VT1); 2251 ResultTys.push_back(VT2); 2252 ResultTys.push_back(VT3); 2253 std::vector<SDOperand> Ops; 2254 Ops.push_back(Op1); 2255 Ops.push_back(Op2); 2256 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2257} 2258SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2259 MVT::ValueType VT2, MVT::ValueType VT3, 2260 SDOperand Op1, SDOperand Op2, 2261 SDOperand Op3, SDOperand Op4, SDOperand Op5) { 2262 std::vector<MVT::ValueType> ResultTys; 2263 ResultTys.push_back(VT1); 2264 ResultTys.push_back(VT2); 2265 ResultTys.push_back(VT3); 2266 std::vector<SDOperand> Ops; 2267 Ops.push_back(Op1); 2268 Ops.push_back(Op2); 2269 Ops.push_back(Op3); 2270 Ops.push_back(Op4); 2271 Ops.push_back(Op5); 2272 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2273} 2274SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2275 MVT::ValueType VT2, MVT::ValueType VT3, 2276 SDOperand Op1, SDOperand Op2, 2277 SDOperand Op3, SDOperand Op4, SDOperand Op5, 2278 SDOperand Op6) { 2279 std::vector<MVT::ValueType> ResultTys; 2280 ResultTys.push_back(VT1); 2281 ResultTys.push_back(VT2); 2282 ResultTys.push_back(VT3); 2283 std::vector<SDOperand> Ops; 2284 Ops.push_back(Op1); 2285 Ops.push_back(Op2); 2286 Ops.push_back(Op3); 2287 Ops.push_back(Op4); 2288 Ops.push_back(Op5); 2289 Ops.push_back(Op6); 2290 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2291} 2292SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2293 MVT::ValueType VT2, MVT::ValueType VT3, 2294 SDOperand Op1, SDOperand Op2, 2295 SDOperand Op3, SDOperand Op4, SDOperand Op5, 2296 SDOperand Op6, SDOperand Op7) { 2297 std::vector<MVT::ValueType> ResultTys; 2298 ResultTys.push_back(VT1); 2299 ResultTys.push_back(VT2); 2300 ResultTys.push_back(VT3); 2301 std::vector<SDOperand> Ops; 2302 Ops.push_back(Op1); 2303 Ops.push_back(Op2); 2304 Ops.push_back(Op3); 2305 Ops.push_back(Op4); 2306 Ops.push_back(Op5); 2307 Ops.push_back(Op6); 2308 Ops.push_back(Op7); 2309 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2310} 2311SDNode *SelectionDAG::getTargetNode(unsigned Opcode, MVT::ValueType VT1, 2312 MVT::ValueType VT2, std::vector<SDOperand> &Ops) { 2313 std::vector<MVT::ValueType> ResultTys; 2314 ResultTys.push_back(VT1); 2315 ResultTys.push_back(VT2); 2316 return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops).Val; 2317} 2318 2319// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead. 2320/// This can cause recursive merging of nodes in the DAG. 2321/// 2322/// This version assumes From/To have a single result value. 2323/// 2324void SelectionDAG::ReplaceAllUsesWith(SDOperand FromN, SDOperand ToN, 2325 std::vector<SDNode*> *Deleted) { 2326 SDNode *From = FromN.Val, *To = ToN.Val; 2327 assert(From->getNumValues() == 1 && To->getNumValues() == 1 && 2328 "Cannot replace with this method!"); 2329 assert(From != To && "Cannot replace uses of with self"); 2330 2331 while (!From->use_empty()) { 2332 // Process users until they are all gone. 2333 SDNode *U = *From->use_begin(); 2334 2335 // This node is about to morph, remove its old self from the CSE maps. 2336 RemoveNodeFromCSEMaps(U); 2337 2338 for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands; 2339 I != E; ++I) 2340 if (I->Val == From) { 2341 From->removeUser(U); 2342 I->Val = To; 2343 To->addUser(U); 2344 } 2345 2346 // Now that we have modified U, add it back to the CSE maps. If it already 2347 // exists there, recursively merge the results together. 2348 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) { 2349 ReplaceAllUsesWith(U, Existing, Deleted); 2350 // U is now dead. 2351 if (Deleted) Deleted->push_back(U); 2352 DeleteNodeNotInCSEMaps(U); 2353 } 2354 } 2355} 2356 2357/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead. 2358/// This can cause recursive merging of nodes in the DAG. 2359/// 2360/// This version assumes From/To have matching types and numbers of result 2361/// values. 2362/// 2363void SelectionDAG::ReplaceAllUsesWith(SDNode *From, SDNode *To, 2364 std::vector<SDNode*> *Deleted) { 2365 assert(From != To && "Cannot replace uses of with self"); 2366 assert(From->getNumValues() == To->getNumValues() && 2367 "Cannot use this version of ReplaceAllUsesWith!"); 2368 if (From->getNumValues() == 1) { // If possible, use the faster version. 2369 ReplaceAllUsesWith(SDOperand(From, 0), SDOperand(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 From->removeUser(U); 2384 I->Val = To; 2385 To->addUser(U); 2386 } 2387 2388 // Now that we have modified U, add it back to the CSE maps. If it already 2389 // exists there, recursively merge the results together. 2390 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) { 2391 ReplaceAllUsesWith(U, Existing, Deleted); 2392 // U is now dead. 2393 if (Deleted) Deleted->push_back(U); 2394 DeleteNodeNotInCSEMaps(U); 2395 } 2396 } 2397} 2398 2399/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead. 2400/// This can cause recursive merging of nodes in the DAG. 2401/// 2402/// This version can replace From with any result values. To must match the 2403/// number and types of values returned by From. 2404void SelectionDAG::ReplaceAllUsesWith(SDNode *From, 2405 const std::vector<SDOperand> &To, 2406 std::vector<SDNode*> *Deleted) { 2407 assert(From->getNumValues() == To.size() && 2408 "Incorrect number of values to replace with!"); 2409 if (To.size() == 1 && To[0].Val->getNumValues() == 1) { 2410 // Degenerate case handled above. 2411 ReplaceAllUsesWith(SDOperand(From, 0), To[0], Deleted); 2412 return; 2413 } 2414 2415 while (!From->use_empty()) { 2416 // Process users until they are all gone. 2417 SDNode *U = *From->use_begin(); 2418 2419 // This node is about to morph, remove its old self from the CSE maps. 2420 RemoveNodeFromCSEMaps(U); 2421 2422 for (SDOperand *I = U->OperandList, *E = U->OperandList+U->NumOperands; 2423 I != E; ++I) 2424 if (I->Val == From) { 2425 const SDOperand &ToOp = To[I->ResNo]; 2426 From->removeUser(U); 2427 *I = ToOp; 2428 ToOp.Val->addUser(U); 2429 } 2430 2431 // Now that we have modified U, add it back to the CSE maps. If it already 2432 // exists there, recursively merge the results together. 2433 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(U)) { 2434 ReplaceAllUsesWith(U, Existing, Deleted); 2435 // U is now dead. 2436 if (Deleted) Deleted->push_back(U); 2437 DeleteNodeNotInCSEMaps(U); 2438 } 2439 } 2440} 2441 2442/// ReplaceAllUsesOfValueWith - Replace any uses of From with To, leaving 2443/// uses of other values produced by From.Val alone. The Deleted vector is 2444/// handled the same was as for ReplaceAllUsesWith. 2445void SelectionDAG::ReplaceAllUsesOfValueWith(SDOperand From, SDOperand To, 2446 std::vector<SDNode*> &Deleted) { 2447 assert(From != To && "Cannot replace a value with itself"); 2448 // Handle the simple, trivial, case efficiently. 2449 if (From.Val->getNumValues() == 1 && To.Val->getNumValues() == 1) { 2450 ReplaceAllUsesWith(From, To, &Deleted); 2451 return; 2452 } 2453 2454 // Get all of the users in a nice, deterministically ordered, uniqued set. 2455 SetVector<SDNode*> Users(From.Val->use_begin(), From.Val->use_end()); 2456 2457 while (!Users.empty()) { 2458 // We know that this user uses some value of From. If it is the right 2459 // value, update it. 2460 SDNode *User = Users.back(); 2461 Users.pop_back(); 2462 2463 for (SDOperand *Op = User->OperandList, 2464 *E = User->OperandList+User->NumOperands; Op != E; ++Op) { 2465 if (*Op == From) { 2466 // Okay, we know this user needs to be updated. Remove its old self 2467 // from the CSE maps. 2468 RemoveNodeFromCSEMaps(User); 2469 2470 // Update all operands that match "From". 2471 for (; Op != E; ++Op) { 2472 if (*Op == From) { 2473 From.Val->removeUser(User); 2474 *Op = To; 2475 To.Val->addUser(User); 2476 } 2477 } 2478 2479 // Now that we have modified User, add it back to the CSE maps. If it 2480 // already exists there, recursively merge the results together. 2481 if (SDNode *Existing = AddNonLeafNodeToCSEMaps(User)) { 2482 unsigned NumDeleted = Deleted.size(); 2483 ReplaceAllUsesWith(User, Existing, &Deleted); 2484 2485 // User is now dead. 2486 Deleted.push_back(User); 2487 DeleteNodeNotInCSEMaps(User); 2488 2489 // We have to be careful here, because ReplaceAllUsesWith could have 2490 // deleted a user of From, which means there may be dangling pointers 2491 // in the "Users" setvector. Scan over the deleted node pointers and 2492 // remove them from the setvector. 2493 for (unsigned i = NumDeleted, e = Deleted.size(); i != e; ++i) 2494 Users.remove(Deleted[i]); 2495 } 2496 break; // Exit the operand scanning loop. 2497 } 2498 } 2499 } 2500} 2501 2502 2503//===----------------------------------------------------------------------===// 2504// SDNode Class 2505//===----------------------------------------------------------------------===// 2506 2507 2508/// getValueTypeList - Return a pointer to the specified value type. 2509/// 2510MVT::ValueType *SDNode::getValueTypeList(MVT::ValueType VT) { 2511 static MVT::ValueType VTs[MVT::LAST_VALUETYPE]; 2512 VTs[VT] = VT; 2513 return &VTs[VT]; 2514} 2515 2516/// hasNUsesOfValue - Return true if there are exactly NUSES uses of the 2517/// indicated value. This method ignores uses of other values defined by this 2518/// operation. 2519bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) const { 2520 assert(Value < getNumValues() && "Bad value!"); 2521 2522 // If there is only one value, this is easy. 2523 if (getNumValues() == 1) 2524 return use_size() == NUses; 2525 if (Uses.size() < NUses) return false; 2526 2527 SDOperand TheValue(const_cast<SDNode *>(this), Value); 2528 2529 std::set<SDNode*> UsersHandled; 2530 2531 for (std::vector<SDNode*>::const_iterator UI = Uses.begin(), E = Uses.end(); 2532 UI != E; ++UI) { 2533 SDNode *User = *UI; 2534 if (User->getNumOperands() == 1 || 2535 UsersHandled.insert(User).second) // First time we've seen this? 2536 for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i) 2537 if (User->getOperand(i) == TheValue) { 2538 if (NUses == 0) 2539 return false; // too many uses 2540 --NUses; 2541 } 2542 } 2543 2544 // Found exactly the right number of uses? 2545 return NUses == 0; 2546} 2547 2548 2549// isOnlyUse - Return true if this node is the only use of N. 2550bool SDNode::isOnlyUse(SDNode *N) const { 2551 bool Seen = false; 2552 for (SDNode::use_iterator I = N->use_begin(), E = N->use_end(); I != E; ++I) { 2553 SDNode *User = *I; 2554 if (User == this) 2555 Seen = true; 2556 else 2557 return false; 2558 } 2559 2560 return Seen; 2561} 2562 2563// isOperand - Return true if this node is an operand of N. 2564bool SDOperand::isOperand(SDNode *N) const { 2565 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) 2566 if (*this == N->getOperand(i)) 2567 return true; 2568 return false; 2569} 2570 2571bool SDNode::isOperand(SDNode *N) const { 2572 for (unsigned i = 0, e = N->NumOperands; i != e; ++i) 2573 if (this == N->OperandList[i].Val) 2574 return true; 2575 return false; 2576} 2577 2578const char *SDNode::getOperationName(const SelectionDAG *G) const { 2579 switch (getOpcode()) { 2580 default: 2581 if (getOpcode() < ISD::BUILTIN_OP_END) 2582 return "<<Unknown DAG Node>>"; 2583 else { 2584 if (G) { 2585 if (const TargetInstrInfo *TII = G->getTarget().getInstrInfo()) 2586 if (getOpcode()-ISD::BUILTIN_OP_END < TII->getNumOpcodes()) 2587 return TII->getName(getOpcode()-ISD::BUILTIN_OP_END); 2588 2589 TargetLowering &TLI = G->getTargetLoweringInfo(); 2590 const char *Name = 2591 TLI.getTargetNodeName(getOpcode()); 2592 if (Name) return Name; 2593 } 2594 2595 return "<<Unknown Target Node>>"; 2596 } 2597 2598 case ISD::PCMARKER: return "PCMarker"; 2599 case ISD::READCYCLECOUNTER: return "ReadCycleCounter"; 2600 case ISD::SRCVALUE: return "SrcValue"; 2601 case ISD::EntryToken: return "EntryToken"; 2602 case ISD::TokenFactor: return "TokenFactor"; 2603 case ISD::AssertSext: return "AssertSext"; 2604 case ISD::AssertZext: return "AssertZext"; 2605 2606 case ISD::STRING: return "String"; 2607 case ISD::BasicBlock: return "BasicBlock"; 2608 case ISD::VALUETYPE: return "ValueType"; 2609 case ISD::Register: return "Register"; 2610 2611 case ISD::Constant: return "Constant"; 2612 case ISD::ConstantFP: return "ConstantFP"; 2613 case ISD::GlobalAddress: return "GlobalAddress"; 2614 case ISD::FrameIndex: return "FrameIndex"; 2615 case ISD::ConstantPool: return "ConstantPool"; 2616 case ISD::ExternalSymbol: return "ExternalSymbol"; 2617 2618 case ISD::BUILD_VECTOR: return "BUILD_VECTOR"; 2619 case ISD::TargetConstant: return "TargetConstant"; 2620 case ISD::TargetConstantFP:return "TargetConstantFP"; 2621 case ISD::TargetGlobalAddress: return "TargetGlobalAddress"; 2622 case ISD::TargetFrameIndex: return "TargetFrameIndex"; 2623 case ISD::TargetConstantPool: return "TargetConstantPool"; 2624 case ISD::TargetExternalSymbol: return "TargetExternalSymbol"; 2625 2626 case ISD::CopyToReg: return "CopyToReg"; 2627 case ISD::CopyFromReg: return "CopyFromReg"; 2628 case ISD::UNDEF: return "undef"; 2629 case ISD::MERGE_VALUES: return "mergevalues"; 2630 case ISD::INLINEASM: return "inlineasm"; 2631 case ISD::HANDLENODE: return "handlenode"; 2632 2633 // Unary operators 2634 case ISD::FABS: return "fabs"; 2635 case ISD::FNEG: return "fneg"; 2636 case ISD::FSQRT: return "fsqrt"; 2637 case ISD::FSIN: return "fsin"; 2638 case ISD::FCOS: return "fcos"; 2639 2640 // Binary operators 2641 case ISD::ADD: return "add"; 2642 case ISD::SUB: return "sub"; 2643 case ISD::MUL: return "mul"; 2644 case ISD::MULHU: return "mulhu"; 2645 case ISD::MULHS: return "mulhs"; 2646 case ISD::SDIV: return "sdiv"; 2647 case ISD::UDIV: return "udiv"; 2648 case ISD::SREM: return "srem"; 2649 case ISD::UREM: return "urem"; 2650 case ISD::AND: return "and"; 2651 case ISD::OR: return "or"; 2652 case ISD::XOR: return "xor"; 2653 case ISD::SHL: return "shl"; 2654 case ISD::SRA: return "sra"; 2655 case ISD::SRL: return "srl"; 2656 case ISD::ROTL: return "rotl"; 2657 case ISD::ROTR: return "rotr"; 2658 case ISD::FADD: return "fadd"; 2659 case ISD::FSUB: return "fsub"; 2660 case ISD::FMUL: return "fmul"; 2661 case ISD::FDIV: return "fdiv"; 2662 case ISD::FREM: return "frem"; 2663 case ISD::FCOPYSIGN: return "fcopysign"; 2664 case ISD::VADD: return "vadd"; 2665 case ISD::VSUB: return "vsub"; 2666 case ISD::VMUL: return "vmul"; 2667 2668 case ISD::SETCC: return "setcc"; 2669 case ISD::SELECT: return "select"; 2670 case ISD::SELECT_CC: return "select_cc"; 2671 case ISD::INSERT_VECTOR_ELT: return "insert_vector_elt"; 2672 case ISD::VINSERT_VECTOR_ELT: return "vinsert_vector_elt"; 2673 case ISD::SCALAR_TO_VECTOR: return "scalar_to_vector"; 2674 case ISD::VBUILD_VECTOR: return "vbuild_vector"; 2675 case ISD::VECTOR_SHUFFLE: return "vector_shuffle"; 2676 case ISD::ADDC: return "addc"; 2677 case ISD::ADDE: return "adde"; 2678 case ISD::SUBC: return "subc"; 2679 case ISD::SUBE: return "sube"; 2680 case ISD::SHL_PARTS: return "shl_parts"; 2681 case ISD::SRA_PARTS: return "sra_parts"; 2682 case ISD::SRL_PARTS: return "srl_parts"; 2683 2684 // Conversion operators. 2685 case ISD::SIGN_EXTEND: return "sign_extend"; 2686 case ISD::ZERO_EXTEND: return "zero_extend"; 2687 case ISD::ANY_EXTEND: return "any_extend"; 2688 case ISD::SIGN_EXTEND_INREG: return "sign_extend_inreg"; 2689 case ISD::TRUNCATE: return "truncate"; 2690 case ISD::FP_ROUND: return "fp_round"; 2691 case ISD::FP_ROUND_INREG: return "fp_round_inreg"; 2692 case ISD::FP_EXTEND: return "fp_extend"; 2693 2694 case ISD::SINT_TO_FP: return "sint_to_fp"; 2695 case ISD::UINT_TO_FP: return "uint_to_fp"; 2696 case ISD::FP_TO_SINT: return "fp_to_sint"; 2697 case ISD::FP_TO_UINT: return "fp_to_uint"; 2698 case ISD::BIT_CONVERT: return "bit_convert"; 2699 2700 // Control flow instructions 2701 case ISD::BR: return "br"; 2702 case ISD::BRCOND: return "brcond"; 2703 case ISD::BR_CC: return "br_cc"; 2704 case ISD::RET: return "ret"; 2705 case ISD::CALLSEQ_START: return "callseq_start"; 2706 case ISD::CALLSEQ_END: return "callseq_end"; 2707 2708 // Other operators 2709 case ISD::LOAD: return "load"; 2710 case ISD::STORE: return "store"; 2711 case ISD::VLOAD: return "vload"; 2712 case ISD::EXTLOAD: return "extload"; 2713 case ISD::SEXTLOAD: return "sextload"; 2714 case ISD::ZEXTLOAD: return "zextload"; 2715 case ISD::TRUNCSTORE: return "truncstore"; 2716 case ISD::VAARG: return "vaarg"; 2717 case ISD::VACOPY: return "vacopy"; 2718 case ISD::VAEND: return "vaend"; 2719 case ISD::VASTART: return "vastart"; 2720 case ISD::DYNAMIC_STACKALLOC: return "dynamic_stackalloc"; 2721 case ISD::EXTRACT_ELEMENT: return "extract_element"; 2722 case ISD::BUILD_PAIR: return "build_pair"; 2723 case ISD::STACKSAVE: return "stacksave"; 2724 case ISD::STACKRESTORE: return "stackrestore"; 2725 2726 // Block memory operations. 2727 case ISD::MEMSET: return "memset"; 2728 case ISD::MEMCPY: return "memcpy"; 2729 case ISD::MEMMOVE: return "memmove"; 2730 2731 // Bit manipulation 2732 case ISD::BSWAP: return "bswap"; 2733 case ISD::CTPOP: return "ctpop"; 2734 case ISD::CTTZ: return "cttz"; 2735 case ISD::CTLZ: return "ctlz"; 2736 2737 // Debug info 2738 case ISD::LOCATION: return "location"; 2739 case ISD::DEBUG_LOC: return "debug_loc"; 2740 case ISD::DEBUG_LABEL: return "debug_label"; 2741 2742 case ISD::CONDCODE: 2743 switch (cast<CondCodeSDNode>(this)->get()) { 2744 default: assert(0 && "Unknown setcc condition!"); 2745 case ISD::SETOEQ: return "setoeq"; 2746 case ISD::SETOGT: return "setogt"; 2747 case ISD::SETOGE: return "setoge"; 2748 case ISD::SETOLT: return "setolt"; 2749 case ISD::SETOLE: return "setole"; 2750 case ISD::SETONE: return "setone"; 2751 2752 case ISD::SETO: return "seto"; 2753 case ISD::SETUO: return "setuo"; 2754 case ISD::SETUEQ: return "setue"; 2755 case ISD::SETUGT: return "setugt"; 2756 case ISD::SETUGE: return "setuge"; 2757 case ISD::SETULT: return "setult"; 2758 case ISD::SETULE: return "setule"; 2759 case ISD::SETUNE: return "setune"; 2760 2761 case ISD::SETEQ: return "seteq"; 2762 case ISD::SETGT: return "setgt"; 2763 case ISD::SETGE: return "setge"; 2764 case ISD::SETLT: return "setlt"; 2765 case ISD::SETLE: return "setle"; 2766 case ISD::SETNE: return "setne"; 2767 } 2768 } 2769} 2770 2771void SDNode::dump() const { dump(0); } 2772void SDNode::dump(const SelectionDAG *G) const { 2773 std::cerr << (void*)this << ": "; 2774 2775 for (unsigned i = 0, e = getNumValues(); i != e; ++i) { 2776 if (i) std::cerr << ","; 2777 if (getValueType(i) == MVT::Other) 2778 std::cerr << "ch"; 2779 else 2780 std::cerr << MVT::getValueTypeString(getValueType(i)); 2781 } 2782 std::cerr << " = " << getOperationName(G); 2783 2784 std::cerr << " "; 2785 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) { 2786 if (i) std::cerr << ", "; 2787 std::cerr << (void*)getOperand(i).Val; 2788 if (unsigned RN = getOperand(i).ResNo) 2789 std::cerr << ":" << RN; 2790 } 2791 2792 if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(this)) { 2793 std::cerr << "<" << CSDN->getValue() << ">"; 2794 } else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(this)) { 2795 std::cerr << "<" << CSDN->getValue() << ">"; 2796 } else if (const GlobalAddressSDNode *GADN = 2797 dyn_cast<GlobalAddressSDNode>(this)) { 2798 int offset = GADN->getOffset(); 2799 std::cerr << "<"; 2800 WriteAsOperand(std::cerr, GADN->getGlobal()) << ">"; 2801 if (offset > 0) 2802 std::cerr << " + " << offset; 2803 else 2804 std::cerr << " " << offset; 2805 } else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(this)) { 2806 std::cerr << "<" << FIDN->getIndex() << ">"; 2807 } else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(this)){ 2808 int offset = CP->getOffset(); 2809 std::cerr << "<" << *CP->get() << ">"; 2810 if (offset > 0) 2811 std::cerr << " + " << offset; 2812 else 2813 std::cerr << " " << offset; 2814 } else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(this)) { 2815 std::cerr << "<"; 2816 const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock(); 2817 if (LBB) 2818 std::cerr << LBB->getName() << " "; 2819 std::cerr << (const void*)BBDN->getBasicBlock() << ">"; 2820 } else if (const RegisterSDNode *R = dyn_cast<RegisterSDNode>(this)) { 2821 if (G && R->getReg() && MRegisterInfo::isPhysicalRegister(R->getReg())) { 2822 std::cerr << " " <<G->getTarget().getRegisterInfo()->getName(R->getReg()); 2823 } else { 2824 std::cerr << " #" << R->getReg(); 2825 } 2826 } else if (const ExternalSymbolSDNode *ES = 2827 dyn_cast<ExternalSymbolSDNode>(this)) { 2828 std::cerr << "'" << ES->getSymbol() << "'"; 2829 } else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(this)) { 2830 if (M->getValue()) 2831 std::cerr << "<" << M->getValue() << ":" << M->getOffset() << ">"; 2832 else 2833 std::cerr << "<null:" << M->getOffset() << ">"; 2834 } else if (const VTSDNode *N = dyn_cast<VTSDNode>(this)) { 2835 std::cerr << ":" << getValueTypeString(N->getVT()); 2836 } 2837} 2838 2839static void DumpNodes(const SDNode *N, unsigned indent, const SelectionDAG *G) { 2840 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) 2841 if (N->getOperand(i).Val->hasOneUse()) 2842 DumpNodes(N->getOperand(i).Val, indent+2, G); 2843 else 2844 std::cerr << "\n" << std::string(indent+2, ' ') 2845 << (void*)N->getOperand(i).Val << ": <multiple use>"; 2846 2847 2848 std::cerr << "\n" << std::string(indent, ' '); 2849 N->dump(G); 2850} 2851 2852void SelectionDAG::dump() const { 2853 std::cerr << "SelectionDAG has " << AllNodes.size() << " nodes:"; 2854 std::vector<const SDNode*> Nodes; 2855 for (allnodes_const_iterator I = allnodes_begin(), E = allnodes_end(); 2856 I != E; ++I) 2857 Nodes.push_back(I); 2858 2859 std::sort(Nodes.begin(), Nodes.end()); 2860 2861 for (unsigned i = 0, e = Nodes.size(); i != e; ++i) { 2862 if (!Nodes[i]->hasOneUse() && Nodes[i] != getRoot().Val) 2863 DumpNodes(Nodes[i], 2, this); 2864 } 2865 2866 DumpNodes(getRoot().Val, 2, this); 2867 2868 std::cerr << "\n\n"; 2869} 2870 2871/// InsertISelMapEntry - A helper function to insert a key / element pair 2872/// into a SDOperand to SDOperand map. This is added to avoid the map 2873/// insertion operator from being inlined. 2874void SelectionDAG::InsertISelMapEntry(std::map<SDOperand, SDOperand> &Map, 2875 SDNode *Key, unsigned KeyResNo, 2876 SDNode *Element, unsigned ElementResNo) { 2877 Map.insert(std::make_pair(SDOperand(Key, KeyResNo), 2878 SDOperand(Element, ElementResNo))); 2879} 2880