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