1//===- CodeGenInstruction.cpp - CodeGen Instruction Class Wrapper ---------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the CodeGenInstruction class. 11// 12//===----------------------------------------------------------------------===// 13 14#include "CodeGenInstruction.h" 15#include "CodeGenTarget.h" 16#include "llvm/ADT/STLExtras.h" 17#include "llvm/ADT/StringExtras.h" 18#include "llvm/ADT/StringMap.h" 19#include "llvm/TableGen/Error.h" 20#include "llvm/TableGen/Record.h" 21#include <set> 22using namespace llvm; 23 24//===----------------------------------------------------------------------===// 25// CGIOperandList Implementation 26//===----------------------------------------------------------------------===// 27 28CGIOperandList::CGIOperandList(Record *R) : TheDef(R) { 29 isPredicable = false; 30 hasOptionalDef = false; 31 isVariadic = false; 32 33 DagInit *OutDI = R->getValueAsDag("OutOperandList"); 34 35 if (DefInit *Init = dyn_cast<DefInit>(OutDI->getOperator())) { 36 if (Init->getDef()->getName() != "outs") 37 PrintFatalError(R->getName() + ": invalid def name for output list: use 'outs'"); 38 } else 39 PrintFatalError(R->getName() + ": invalid output list: use 'outs'"); 40 41 NumDefs = OutDI->getNumArgs(); 42 43 DagInit *InDI = R->getValueAsDag("InOperandList"); 44 if (DefInit *Init = dyn_cast<DefInit>(InDI->getOperator())) { 45 if (Init->getDef()->getName() != "ins") 46 PrintFatalError(R->getName() + ": invalid def name for input list: use 'ins'"); 47 } else 48 PrintFatalError(R->getName() + ": invalid input list: use 'ins'"); 49 50 unsigned MIOperandNo = 0; 51 std::set<std::string> OperandNames; 52 for (unsigned i = 0, e = InDI->getNumArgs()+OutDI->getNumArgs(); i != e; ++i){ 53 Init *ArgInit; 54 std::string ArgName; 55 if (i < NumDefs) { 56 ArgInit = OutDI->getArg(i); 57 ArgName = OutDI->getArgName(i); 58 } else { 59 ArgInit = InDI->getArg(i-NumDefs); 60 ArgName = InDI->getArgName(i-NumDefs); 61 } 62 63 DefInit *Arg = dyn_cast<DefInit>(ArgInit); 64 if (!Arg) 65 PrintFatalError("Illegal operand for the '" + R->getName() + "' instruction!"); 66 67 Record *Rec = Arg->getDef(); 68 std::string PrintMethod = "printOperand"; 69 std::string EncoderMethod; 70 std::string OperandType = "OPERAND_UNKNOWN"; 71 unsigned NumOps = 1; 72 DagInit *MIOpInfo = 0; 73 if (Rec->isSubClassOf("RegisterOperand")) { 74 PrintMethod = Rec->getValueAsString("PrintMethod"); 75 } else if (Rec->isSubClassOf("Operand")) { 76 PrintMethod = Rec->getValueAsString("PrintMethod"); 77 OperandType = Rec->getValueAsString("OperandType"); 78 // If there is an explicit encoder method, use it. 79 EncoderMethod = Rec->getValueAsString("EncoderMethod"); 80 MIOpInfo = Rec->getValueAsDag("MIOperandInfo"); 81 82 // Verify that MIOpInfo has an 'ops' root value. 83 if (!isa<DefInit>(MIOpInfo->getOperator()) || 84 cast<DefInit>(MIOpInfo->getOperator())->getDef()->getName() != "ops") 85 PrintFatalError("Bad value for MIOperandInfo in operand '" + Rec->getName() + 86 "'\n"); 87 88 // If we have MIOpInfo, then we have #operands equal to number of entries 89 // in MIOperandInfo. 90 if (unsigned NumArgs = MIOpInfo->getNumArgs()) 91 NumOps = NumArgs; 92 93 if (Rec->isSubClassOf("PredicateOp")) 94 isPredicable = true; 95 else if (Rec->isSubClassOf("OptionalDefOperand")) 96 hasOptionalDef = true; 97 } else if (Rec->getName() == "variable_ops") { 98 isVariadic = true; 99 continue; 100 } else if (Rec->isSubClassOf("RegisterClass")) { 101 OperandType = "OPERAND_REGISTER"; 102 } else if (!Rec->isSubClassOf("PointerLikeRegClass") && 103 !Rec->isSubClassOf("unknown_class")) 104 PrintFatalError("Unknown operand class '" + Rec->getName() + 105 "' in '" + R->getName() + "' instruction!"); 106 107 // Check that the operand has a name and that it's unique. 108 if (ArgName.empty()) 109 PrintFatalError("In instruction '" + R->getName() + "', operand #" + utostr(i) + 110 " has no name!"); 111 if (!OperandNames.insert(ArgName).second) 112 PrintFatalError("In instruction '" + R->getName() + "', operand #" + utostr(i) + 113 " has the same name as a previous operand!"); 114 115 OperandList.push_back(OperandInfo(Rec, ArgName, PrintMethod, EncoderMethod, 116 OperandType, MIOperandNo, NumOps, 117 MIOpInfo)); 118 MIOperandNo += NumOps; 119 } 120 121 122 // Make sure the constraints list for each operand is large enough to hold 123 // constraint info, even if none is present. 124 for (unsigned i = 0, e = OperandList.size(); i != e; ++i) 125 OperandList[i].Constraints.resize(OperandList[i].MINumOperands); 126} 127 128 129/// getOperandNamed - Return the index of the operand with the specified 130/// non-empty name. If the instruction does not have an operand with the 131/// specified name, abort. 132/// 133unsigned CGIOperandList::getOperandNamed(StringRef Name) const { 134 unsigned OpIdx; 135 if (hasOperandNamed(Name, OpIdx)) return OpIdx; 136 PrintFatalError("'" + TheDef->getName() + "' does not have an operand named '$" + 137 Name.str() + "'!"); 138} 139 140/// hasOperandNamed - Query whether the instruction has an operand of the 141/// given name. If so, return true and set OpIdx to the index of the 142/// operand. Otherwise, return false. 143bool CGIOperandList::hasOperandNamed(StringRef Name, unsigned &OpIdx) const { 144 assert(!Name.empty() && "Cannot search for operand with no name!"); 145 for (unsigned i = 0, e = OperandList.size(); i != e; ++i) 146 if (OperandList[i].Name == Name) { 147 OpIdx = i; 148 return true; 149 } 150 return false; 151} 152 153std::pair<unsigned,unsigned> 154CGIOperandList::ParseOperandName(const std::string &Op, bool AllowWholeOp) { 155 if (Op.empty() || Op[0] != '$') 156 PrintFatalError(TheDef->getName() + ": Illegal operand name: '" + Op + "'"); 157 158 std::string OpName = Op.substr(1); 159 std::string SubOpName; 160 161 // Check to see if this is $foo.bar. 162 std::string::size_type DotIdx = OpName.find_first_of("."); 163 if (DotIdx != std::string::npos) { 164 SubOpName = OpName.substr(DotIdx+1); 165 if (SubOpName.empty()) 166 PrintFatalError(TheDef->getName() + ": illegal empty suboperand name in '" +Op +"'"); 167 OpName = OpName.substr(0, DotIdx); 168 } 169 170 unsigned OpIdx = getOperandNamed(OpName); 171 172 if (SubOpName.empty()) { // If no suboperand name was specified: 173 // If one was needed, throw. 174 if (OperandList[OpIdx].MINumOperands > 1 && !AllowWholeOp && 175 SubOpName.empty()) 176 PrintFatalError(TheDef->getName() + ": Illegal to refer to" 177 " whole operand part of complex operand '" + Op + "'"); 178 179 // Otherwise, return the operand. 180 return std::make_pair(OpIdx, 0U); 181 } 182 183 // Find the suboperand number involved. 184 DagInit *MIOpInfo = OperandList[OpIdx].MIOperandInfo; 185 if (MIOpInfo == 0) 186 PrintFatalError(TheDef->getName() + ": unknown suboperand name in '" + Op + "'"); 187 188 // Find the operand with the right name. 189 for (unsigned i = 0, e = MIOpInfo->getNumArgs(); i != e; ++i) 190 if (MIOpInfo->getArgName(i) == SubOpName) 191 return std::make_pair(OpIdx, i); 192 193 // Otherwise, didn't find it! 194 PrintFatalError(TheDef->getName() + ": unknown suboperand name in '" + Op + "'"); 195 return std::make_pair(0U, 0U); 196} 197 198static void ParseConstraint(const std::string &CStr, CGIOperandList &Ops) { 199 // EARLY_CLOBBER: @early $reg 200 std::string::size_type wpos = CStr.find_first_of(" \t"); 201 std::string::size_type start = CStr.find_first_not_of(" \t"); 202 std::string Tok = CStr.substr(start, wpos - start); 203 if (Tok == "@earlyclobber") { 204 std::string Name = CStr.substr(wpos+1); 205 wpos = Name.find_first_not_of(" \t"); 206 if (wpos == std::string::npos) 207 PrintFatalError("Illegal format for @earlyclobber constraint: '" + CStr + "'"); 208 Name = Name.substr(wpos); 209 std::pair<unsigned,unsigned> Op = Ops.ParseOperandName(Name, false); 210 211 // Build the string for the operand 212 if (!Ops[Op.first].Constraints[Op.second].isNone()) 213 PrintFatalError("Operand '" + Name + "' cannot have multiple constraints!"); 214 Ops[Op.first].Constraints[Op.second] = 215 CGIOperandList::ConstraintInfo::getEarlyClobber(); 216 return; 217 } 218 219 // Only other constraint is "TIED_TO" for now. 220 std::string::size_type pos = CStr.find_first_of('='); 221 assert(pos != std::string::npos && "Unrecognized constraint"); 222 start = CStr.find_first_not_of(" \t"); 223 std::string Name = CStr.substr(start, pos - start); 224 225 // TIED_TO: $src1 = $dst 226 wpos = Name.find_first_of(" \t"); 227 if (wpos == std::string::npos) 228 PrintFatalError("Illegal format for tied-to constraint: '" + CStr + "'"); 229 std::string DestOpName = Name.substr(0, wpos); 230 std::pair<unsigned,unsigned> DestOp = Ops.ParseOperandName(DestOpName, false); 231 232 Name = CStr.substr(pos+1); 233 wpos = Name.find_first_not_of(" \t"); 234 if (wpos == std::string::npos) 235 PrintFatalError("Illegal format for tied-to constraint: '" + CStr + "'"); 236 237 std::string SrcOpName = Name.substr(wpos); 238 std::pair<unsigned,unsigned> SrcOp = Ops.ParseOperandName(SrcOpName, false); 239 if (SrcOp > DestOp) { 240 std::swap(SrcOp, DestOp); 241 std::swap(SrcOpName, DestOpName); 242 } 243 244 unsigned FlatOpNo = Ops.getFlattenedOperandNumber(SrcOp); 245 246 if (!Ops[DestOp.first].Constraints[DestOp.second].isNone()) 247 PrintFatalError("Operand '" + DestOpName + 248 "' cannot have multiple constraints!"); 249 Ops[DestOp.first].Constraints[DestOp.second] = 250 CGIOperandList::ConstraintInfo::getTied(FlatOpNo); 251} 252 253static void ParseConstraints(const std::string &CStr, CGIOperandList &Ops) { 254 if (CStr.empty()) return; 255 256 const std::string delims(","); 257 std::string::size_type bidx, eidx; 258 259 bidx = CStr.find_first_not_of(delims); 260 while (bidx != std::string::npos) { 261 eidx = CStr.find_first_of(delims, bidx); 262 if (eidx == std::string::npos) 263 eidx = CStr.length(); 264 265 ParseConstraint(CStr.substr(bidx, eidx - bidx), Ops); 266 bidx = CStr.find_first_not_of(delims, eidx); 267 } 268} 269 270void CGIOperandList::ProcessDisableEncoding(std::string DisableEncoding) { 271 while (1) { 272 std::pair<StringRef, StringRef> P = getToken(DisableEncoding, " ,\t"); 273 std::string OpName = P.first; 274 DisableEncoding = P.second; 275 if (OpName.empty()) break; 276 277 // Figure out which operand this is. 278 std::pair<unsigned,unsigned> Op = ParseOperandName(OpName, false); 279 280 // Mark the operand as not-to-be encoded. 281 if (Op.second >= OperandList[Op.first].DoNotEncode.size()) 282 OperandList[Op.first].DoNotEncode.resize(Op.second+1); 283 OperandList[Op.first].DoNotEncode[Op.second] = true; 284 } 285 286} 287 288//===----------------------------------------------------------------------===// 289// CodeGenInstruction Implementation 290//===----------------------------------------------------------------------===// 291 292CodeGenInstruction::CodeGenInstruction(Record *R) 293 : TheDef(R), Operands(R), InferredFrom(0) { 294 Namespace = R->getValueAsString("Namespace"); 295 AsmString = R->getValueAsString("AsmString"); 296 297 isReturn = R->getValueAsBit("isReturn"); 298 isBranch = R->getValueAsBit("isBranch"); 299 isIndirectBranch = R->getValueAsBit("isIndirectBranch"); 300 isCompare = R->getValueAsBit("isCompare"); 301 isMoveImm = R->getValueAsBit("isMoveImm"); 302 isBitcast = R->getValueAsBit("isBitcast"); 303 isSelect = R->getValueAsBit("isSelect"); 304 isBarrier = R->getValueAsBit("isBarrier"); 305 isCall = R->getValueAsBit("isCall"); 306 canFoldAsLoad = R->getValueAsBit("canFoldAsLoad"); 307 isPredicable = Operands.isPredicable || R->getValueAsBit("isPredicable"); 308 isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress"); 309 isCommutable = R->getValueAsBit("isCommutable"); 310 isTerminator = R->getValueAsBit("isTerminator"); 311 isReMaterializable = R->getValueAsBit("isReMaterializable"); 312 hasDelaySlot = R->getValueAsBit("hasDelaySlot"); 313 usesCustomInserter = R->getValueAsBit("usesCustomInserter"); 314 hasPostISelHook = R->getValueAsBit("hasPostISelHook"); 315 hasCtrlDep = R->getValueAsBit("hasCtrlDep"); 316 isNotDuplicable = R->getValueAsBit("isNotDuplicable"); 317 318 mayLoad = R->getValueAsBitOrUnset("mayLoad", mayLoad_Unset); 319 mayStore = R->getValueAsBitOrUnset("mayStore", mayStore_Unset); 320 hasSideEffects = R->getValueAsBitOrUnset("hasSideEffects", 321 hasSideEffects_Unset); 322 neverHasSideEffects = R->getValueAsBit("neverHasSideEffects"); 323 324 isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove"); 325 hasExtraSrcRegAllocReq = R->getValueAsBit("hasExtraSrcRegAllocReq"); 326 hasExtraDefRegAllocReq = R->getValueAsBit("hasExtraDefRegAllocReq"); 327 isCodeGenOnly = R->getValueAsBit("isCodeGenOnly"); 328 isPseudo = R->getValueAsBit("isPseudo"); 329 ImplicitDefs = R->getValueAsListOfDefs("Defs"); 330 ImplicitUses = R->getValueAsListOfDefs("Uses"); 331 332 if (neverHasSideEffects + hasSideEffects > 1) 333 PrintFatalError(R->getName() + ": multiple conflicting side-effect flags set!"); 334 335 // Parse Constraints. 336 ParseConstraints(R->getValueAsString("Constraints"), Operands); 337 338 // Parse the DisableEncoding field. 339 Operands.ProcessDisableEncoding(R->getValueAsString("DisableEncoding")); 340 341 // First check for a ComplexDeprecationPredicate. 342 if (R->getValue("ComplexDeprecationPredicate")) { 343 HasComplexDeprecationPredicate = true; 344 DeprecatedReason = R->getValueAsString("ComplexDeprecationPredicate"); 345 } else if (RecordVal *Dep = R->getValue("DeprecatedFeatureMask")) { 346 // Check if we have a Subtarget feature mask. 347 HasComplexDeprecationPredicate = false; 348 DeprecatedReason = Dep->getValue()->getAsString(); 349 } else { 350 // This instruction isn't deprecated. 351 HasComplexDeprecationPredicate = false; 352 DeprecatedReason = ""; 353 } 354} 355 356/// HasOneImplicitDefWithKnownVT - If the instruction has at least one 357/// implicit def and it has a known VT, return the VT, otherwise return 358/// MVT::Other. 359MVT::SimpleValueType CodeGenInstruction:: 360HasOneImplicitDefWithKnownVT(const CodeGenTarget &TargetInfo) const { 361 if (ImplicitDefs.empty()) return MVT::Other; 362 363 // Check to see if the first implicit def has a resolvable type. 364 Record *FirstImplicitDef = ImplicitDefs[0]; 365 assert(FirstImplicitDef->isSubClassOf("Register")); 366 const std::vector<MVT::SimpleValueType> &RegVTs = 367 TargetInfo.getRegisterVTs(FirstImplicitDef); 368 if (RegVTs.size() == 1) 369 return RegVTs[0]; 370 return MVT::Other; 371} 372 373 374/// FlattenAsmStringVariants - Flatten the specified AsmString to only 375/// include text from the specified variant, returning the new string. 376std::string CodeGenInstruction:: 377FlattenAsmStringVariants(StringRef Cur, unsigned Variant) { 378 std::string Res = ""; 379 380 for (;;) { 381 // Find the start of the next variant string. 382 size_t VariantsStart = 0; 383 for (size_t e = Cur.size(); VariantsStart != e; ++VariantsStart) 384 if (Cur[VariantsStart] == '{' && 385 (VariantsStart == 0 || (Cur[VariantsStart-1] != '$' && 386 Cur[VariantsStart-1] != '\\'))) 387 break; 388 389 // Add the prefix to the result. 390 Res += Cur.slice(0, VariantsStart); 391 if (VariantsStart == Cur.size()) 392 break; 393 394 ++VariantsStart; // Skip the '{'. 395 396 // Scan to the end of the variants string. 397 size_t VariantsEnd = VariantsStart; 398 unsigned NestedBraces = 1; 399 for (size_t e = Cur.size(); VariantsEnd != e; ++VariantsEnd) { 400 if (Cur[VariantsEnd] == '}' && Cur[VariantsEnd-1] != '\\') { 401 if (--NestedBraces == 0) 402 break; 403 } else if (Cur[VariantsEnd] == '{') 404 ++NestedBraces; 405 } 406 407 // Select the Nth variant (or empty). 408 StringRef Selection = Cur.slice(VariantsStart, VariantsEnd); 409 for (unsigned i = 0; i != Variant; ++i) 410 Selection = Selection.split('|').second; 411 Res += Selection.split('|').first; 412 413 assert(VariantsEnd != Cur.size() && 414 "Unterminated variants in assembly string!"); 415 Cur = Cur.substr(VariantsEnd + 1); 416 } 417 418 return Res; 419} 420 421 422//===----------------------------------------------------------------------===// 423/// CodeGenInstAlias Implementation 424//===----------------------------------------------------------------------===// 425 426/// tryAliasOpMatch - This is a helper function for the CodeGenInstAlias 427/// constructor. It checks if an argument in an InstAlias pattern matches 428/// the corresponding operand of the instruction. It returns true on a 429/// successful match, with ResOp set to the result operand to be used. 430bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo, 431 Record *InstOpRec, bool hasSubOps, 432 ArrayRef<SMLoc> Loc, CodeGenTarget &T, 433 ResultOperand &ResOp) { 434 Init *Arg = Result->getArg(AliasOpNo); 435 DefInit *ADI = dyn_cast<DefInit>(Arg); 436 437 if (ADI && ADI->getDef() == InstOpRec) { 438 // If the operand is a record, it must have a name, and the record type 439 // must match up with the instruction's argument type. 440 if (Result->getArgName(AliasOpNo).empty()) 441 PrintFatalError(Loc, "result argument #" + utostr(AliasOpNo) + 442 " must have a name!"); 443 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 444 return true; 445 } 446 447 // For register operands, the source register class can be a subclass 448 // of the instruction register class, not just an exact match. 449 if (ADI && ADI->getDef()->isSubClassOf("RegisterClass")) { 450 if (!InstOpRec->isSubClassOf("RegisterClass")) 451 return false; 452 if (!T.getRegisterClass(InstOpRec) 453 .hasSubClass(&T.getRegisterClass(ADI->getDef()))) 454 return false; 455 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 456 return true; 457 } 458 459 // Handle explicit registers. 460 if (ADI && ADI->getDef()->isSubClassOf("Register")) { 461 if (InstOpRec->isSubClassOf("OptionalDefOperand")) { 462 DagInit *DI = InstOpRec->getValueAsDag("MIOperandInfo"); 463 // The operand info should only have a single (register) entry. We 464 // want the register class of it. 465 InstOpRec = cast<DefInit>(DI->getArg(0))->getDef(); 466 } 467 468 if (InstOpRec->isSubClassOf("RegisterOperand")) 469 InstOpRec = InstOpRec->getValueAsDef("RegClass"); 470 471 if (!InstOpRec->isSubClassOf("RegisterClass")) 472 return false; 473 474 if (!T.getRegisterClass(InstOpRec) 475 .contains(T.getRegBank().getReg(ADI->getDef()))) 476 PrintFatalError(Loc, "fixed register " + ADI->getDef()->getName() + 477 " is not a member of the " + InstOpRec->getName() + 478 " register class!"); 479 480 if (!Result->getArgName(AliasOpNo).empty()) 481 PrintFatalError(Loc, "result fixed register argument must " 482 "not have a name!"); 483 484 ResOp = ResultOperand(ADI->getDef()); 485 return true; 486 } 487 488 // Handle "zero_reg" for optional def operands. 489 if (ADI && ADI->getDef()->getName() == "zero_reg") { 490 491 // Check if this is an optional def. 492 // Tied operands where the source is a sub-operand of a complex operand 493 // need to represent both operands in the alias destination instruction. 494 // Allow zero_reg for the tied portion. This can and should go away once 495 // the MC representation of things doesn't use tied operands at all. 496 //if (!InstOpRec->isSubClassOf("OptionalDefOperand")) 497 // throw TGError(Loc, "reg0 used for result that is not an " 498 // "OptionalDefOperand!"); 499 500 ResOp = ResultOperand(static_cast<Record*>(0)); 501 return true; 502 } 503 504 // Literal integers. 505 if (IntInit *II = dyn_cast<IntInit>(Arg)) { 506 if (hasSubOps || !InstOpRec->isSubClassOf("Operand")) 507 return false; 508 // Integer arguments can't have names. 509 if (!Result->getArgName(AliasOpNo).empty()) 510 PrintFatalError(Loc, "result argument #" + utostr(AliasOpNo) + 511 " must not have a name!"); 512 ResOp = ResultOperand(II->getValue()); 513 return true; 514 } 515 516 // If both are Operands with the same MVT, allow the conversion. It's 517 // up to the user to make sure the values are appropriate, just like 518 // for isel Pat's. 519 if (InstOpRec->isSubClassOf("Operand") && 520 ADI->getDef()->isSubClassOf("Operand")) { 521 // FIXME: What other attributes should we check here? Identical 522 // MIOperandInfo perhaps? 523 if (InstOpRec->getValueInit("Type") != ADI->getDef()->getValueInit("Type")) 524 return false; 525 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 526 return true; 527 } 528 529 return false; 530} 531 532CodeGenInstAlias::CodeGenInstAlias(Record *R, CodeGenTarget &T) : TheDef(R) { 533 AsmString = R->getValueAsString("AsmString"); 534 Result = R->getValueAsDag("ResultInst"); 535 536 // Verify that the root of the result is an instruction. 537 DefInit *DI = dyn_cast<DefInit>(Result->getOperator()); 538 if (DI == 0 || !DI->getDef()->isSubClassOf("Instruction")) 539 PrintFatalError(R->getLoc(), 540 "result of inst alias should be an instruction"); 541 542 ResultInst = &T.getInstruction(DI->getDef()); 543 544 // NameClass - If argument names are repeated, we need to verify they have 545 // the same class. 546 StringMap<Record*> NameClass; 547 for (unsigned i = 0, e = Result->getNumArgs(); i != e; ++i) { 548 DefInit *ADI = dyn_cast<DefInit>(Result->getArg(i)); 549 if (!ADI || Result->getArgName(i).empty()) 550 continue; 551 // Verify we don't have something like: (someinst GR16:$foo, GR32:$foo) 552 // $foo can exist multiple times in the result list, but it must have the 553 // same type. 554 Record *&Entry = NameClass[Result->getArgName(i)]; 555 if (Entry && Entry != ADI->getDef()) 556 PrintFatalError(R->getLoc(), "result value $" + Result->getArgName(i) + 557 " is both " + Entry->getName() + " and " + 558 ADI->getDef()->getName() + "!"); 559 Entry = ADI->getDef(); 560 } 561 562 // Decode and validate the arguments of the result. 563 unsigned AliasOpNo = 0; 564 for (unsigned i = 0, e = ResultInst->Operands.size(); i != e; ++i) { 565 566 // Tied registers don't have an entry in the result dag unless they're part 567 // of a complex operand, in which case we include them anyways, as we 568 // don't have any other way to specify the whole operand. 569 if (ResultInst->Operands[i].MINumOperands == 1 && 570 ResultInst->Operands[i].getTiedRegister() != -1) 571 continue; 572 573 if (AliasOpNo >= Result->getNumArgs()) 574 PrintFatalError(R->getLoc(), "not enough arguments for instruction!"); 575 576 Record *InstOpRec = ResultInst->Operands[i].Rec; 577 unsigned NumSubOps = ResultInst->Operands[i].MINumOperands; 578 ResultOperand ResOp(static_cast<int64_t>(0)); 579 if (tryAliasOpMatch(Result, AliasOpNo, InstOpRec, (NumSubOps > 1), 580 R->getLoc(), T, ResOp)) { 581 // If this is a simple operand, or a complex operand with a custom match 582 // class, then we can match is verbatim. 583 if (NumSubOps == 1 || 584 (InstOpRec->getValue("ParserMatchClass") && 585 InstOpRec->getValueAsDef("ParserMatchClass") 586 ->getValueAsString("Name") != "Imm")) { 587 ResultOperands.push_back(ResOp); 588 ResultInstOperandIndex.push_back(std::make_pair(i, -1)); 589 ++AliasOpNo; 590 591 // Otherwise, we need to match each of the suboperands individually. 592 } else { 593 DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo; 594 for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) { 595 Record *SubRec = cast<DefInit>(MIOI->getArg(SubOp))->getDef(); 596 597 // Take care to instantiate each of the suboperands with the correct 598 // nomenclature: $foo.bar 599 ResultOperands.push_back( 600 ResultOperand(Result->getArgName(AliasOpNo) + "." + 601 MIOI->getArgName(SubOp), SubRec)); 602 ResultInstOperandIndex.push_back(std::make_pair(i, SubOp)); 603 } 604 ++AliasOpNo; 605 } 606 continue; 607 } 608 609 // If the argument did not match the instruction operand, and the operand 610 // is composed of multiple suboperands, try matching the suboperands. 611 if (NumSubOps > 1) { 612 DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo; 613 for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) { 614 if (AliasOpNo >= Result->getNumArgs()) 615 PrintFatalError(R->getLoc(), "not enough arguments for instruction!"); 616 Record *SubRec = cast<DefInit>(MIOI->getArg(SubOp))->getDef(); 617 if (tryAliasOpMatch(Result, AliasOpNo, SubRec, false, 618 R->getLoc(), T, ResOp)) { 619 ResultOperands.push_back(ResOp); 620 ResultInstOperandIndex.push_back(std::make_pair(i, SubOp)); 621 ++AliasOpNo; 622 } else { 623 PrintFatalError(R->getLoc(), "result argument #" + utostr(AliasOpNo) + 624 " does not match instruction operand class " + 625 (SubOp == 0 ? InstOpRec->getName() :SubRec->getName())); 626 } 627 } 628 continue; 629 } 630 PrintFatalError(R->getLoc(), "result argument #" + utostr(AliasOpNo) + 631 " does not match instruction operand class " + 632 InstOpRec->getName()); 633 } 634 635 if (AliasOpNo != Result->getNumArgs()) 636 PrintFatalError(R->getLoc(), "too many operands for instruction!"); 637} 638