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) 291 : TheDef(R), Operands(R), InferredFrom(0) { 292 Namespace = R->getValueAsString("Namespace"); 293 AsmString = R->getValueAsString("AsmString"); 294 295 isReturn = R->getValueAsBit("isReturn"); 296 isBranch = R->getValueAsBit("isBranch"); 297 isIndirectBranch = R->getValueAsBit("isIndirectBranch"); 298 isCompare = R->getValueAsBit("isCompare"); 299 isMoveImm = R->getValueAsBit("isMoveImm"); 300 isBitcast = R->getValueAsBit("isBitcast"); 301 isSelect = R->getValueAsBit("isSelect"); 302 isBarrier = R->getValueAsBit("isBarrier"); 303 isCall = R->getValueAsBit("isCall"); 304 canFoldAsLoad = R->getValueAsBit("canFoldAsLoad"); 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"); 315 316 mayLoad = R->getValueAsBitOrUnset("mayLoad", mayLoad_Unset); 317 mayStore = R->getValueAsBitOrUnset("mayStore", mayStore_Unset); 318 hasSideEffects = R->getValueAsBitOrUnset("hasSideEffects", 319 hasSideEffects_Unset); 320 neverHasSideEffects = R->getValueAsBit("neverHasSideEffects"); 321 322 isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove"); 323 hasExtraSrcRegAllocReq = R->getValueAsBit("hasExtraSrcRegAllocReq"); 324 hasExtraDefRegAllocReq = R->getValueAsBit("hasExtraDefRegAllocReq"); 325 isCodeGenOnly = R->getValueAsBit("isCodeGenOnly"); 326 isPseudo = R->getValueAsBit("isPseudo"); 327 ImplicitDefs = R->getValueAsListOfDefs("Defs"); 328 ImplicitUses = R->getValueAsListOfDefs("Uses"); 329 330 if (neverHasSideEffects + hasSideEffects > 1) 331 throw R->getName() + ": multiple conflicting side-effect flags set!"; 332 333 // Parse Constraints. 334 ParseConstraints(R->getValueAsString("Constraints"), Operands); 335 336 // Parse the DisableEncoding field. 337 Operands.ProcessDisableEncoding(R->getValueAsString("DisableEncoding")); 338 } 339 340 /// HasOneImplicitDefWithKnownVT - If the instruction has at least one 341 /// implicit def and it has a known VT, return the VT, otherwise return 342 /// MVT::Other. 343 MVT::SimpleValueType CodeGenInstruction:: 344 HasOneImplicitDefWithKnownVT(const CodeGenTarget &TargetInfo) const { 345 if (ImplicitDefs.empty()) return MVT::Other; 346 347 // Check to see if the first implicit def has a resolvable type. 348 Record *FirstImplicitDef = ImplicitDefs[0]; 349 assert(FirstImplicitDef->isSubClassOf("Register")); 350 const std::vector<MVT::SimpleValueType> &RegVTs = 351 TargetInfo.getRegisterVTs(FirstImplicitDef); 352 if (RegVTs.size() == 1) 353 return RegVTs[0]; 354 return MVT::Other; 355 } 356 357 358 /// FlattenAsmStringVariants - Flatten the specified AsmString to only 359 /// include text from the specified variant, returning the new string. 360 std::string CodeGenInstruction:: 361 FlattenAsmStringVariants(StringRef Cur, unsigned Variant) { 362 std::string Res = ""; 363 364 for (;;) { 365 // Find the start of the next variant string. 366 size_t VariantsStart = 0; 367 for (size_t e = Cur.size(); VariantsStart != e; ++VariantsStart) 368 if (Cur[VariantsStart] == '{' && 369 (VariantsStart == 0 || (Cur[VariantsStart-1] != '$' && 370 Cur[VariantsStart-1] != '\\'))) 371 break; 372 373 // Add the prefix to the result. 374 Res += Cur.slice(0, VariantsStart); 375 if (VariantsStart == Cur.size()) 376 break; 377 378 ++VariantsStart; // Skip the '{'. 379 380 // Scan to the end of the variants string. 381 size_t VariantsEnd = VariantsStart; 382 unsigned NestedBraces = 1; 383 for (size_t e = Cur.size(); VariantsEnd != e; ++VariantsEnd) { 384 if (Cur[VariantsEnd] == '}' && Cur[VariantsEnd-1] != '\\') { 385 if (--NestedBraces == 0) 386 break; 387 } else if (Cur[VariantsEnd] == '{') 388 ++NestedBraces; 389 } 390 391 // Select the Nth variant (or empty). 392 StringRef Selection = Cur.slice(VariantsStart, VariantsEnd); 393 for (unsigned i = 0; i != Variant; ++i) 394 Selection = Selection.split('|').second; 395 Res += Selection.split('|').first; 396 397 assert(VariantsEnd != Cur.size() && 398 "Unterminated variants in assembly string!"); 399 Cur = Cur.substr(VariantsEnd + 1); 400 } 401 402 return Res; 403 } 404 405 406 //===----------------------------------------------------------------------===// 407 /// CodeGenInstAlias Implementation 408 //===----------------------------------------------------------------------===// 409 410 /// tryAliasOpMatch - This is a helper function for the CodeGenInstAlias 411 /// constructor. It checks if an argument in an InstAlias pattern matches 412 /// the corresponding operand of the instruction. It returns true on a 413 /// successful match, with ResOp set to the result operand to be used. 414 bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo, 415 Record *InstOpRec, bool hasSubOps, 416 ArrayRef<SMLoc> Loc, CodeGenTarget &T, 417 ResultOperand &ResOp) { 418 Init *Arg = Result->getArg(AliasOpNo); 419 DefInit *ADI = dynamic_cast<DefInit*>(Arg); 420 421 if (ADI && ADI->getDef() == InstOpRec) { 422 // If the operand is a record, it must have a name, and the record type 423 // must match up with the instruction's argument type. 424 if (Result->getArgName(AliasOpNo).empty()) 425 throw TGError(Loc, "result argument #" + utostr(AliasOpNo) + 426 " must have a name!"); 427 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 428 return true; 429 } 430 431 // For register operands, the source register class can be a subclass 432 // of the instruction register class, not just an exact match. 433 if (ADI && ADI->getDef()->isSubClassOf("RegisterClass")) { 434 if (!InstOpRec->isSubClassOf("RegisterClass")) 435 return false; 436 if (!T.getRegisterClass(InstOpRec) 437 .hasSubClass(&T.getRegisterClass(ADI->getDef()))) 438 return false; 439 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 440 return true; 441 } 442 443 // Handle explicit registers. 444 if (ADI && ADI->getDef()->isSubClassOf("Register")) { 445 if (InstOpRec->isSubClassOf("OptionalDefOperand")) { 446 DagInit *DI = InstOpRec->getValueAsDag("MIOperandInfo"); 447 // The operand info should only have a single (register) entry. We 448 // want the register class of it. 449 InstOpRec = dynamic_cast<DefInit*>(DI->getArg(0))->getDef(); 450 } 451 452 if (InstOpRec->isSubClassOf("RegisterOperand")) 453 InstOpRec = InstOpRec->getValueAsDef("RegClass"); 454 455 if (!InstOpRec->isSubClassOf("RegisterClass")) 456 return false; 457 458 if (!T.getRegisterClass(InstOpRec) 459 .contains(T.getRegBank().getReg(ADI->getDef()))) 460 throw TGError(Loc, "fixed register " + ADI->getDef()->getName() + 461 " is not a member of the " + InstOpRec->getName() + 462 " register class!"); 463 464 if (!Result->getArgName(AliasOpNo).empty()) 465 throw TGError(Loc, "result fixed register argument must " 466 "not have a name!"); 467 468 ResOp = ResultOperand(ADI->getDef()); 469 return true; 470 } 471 472 // Handle "zero_reg" for optional def operands. 473 if (ADI && ADI->getDef()->getName() == "zero_reg") { 474 475 // Check if this is an optional def. 476 // Tied operands where the source is a sub-operand of a complex operand 477 // need to represent both operands in the alias destination instruction. 478 // Allow zero_reg for the tied portion. This can and should go away once 479 // the MC representation of things doesn't use tied operands at all. 480 //if (!InstOpRec->isSubClassOf("OptionalDefOperand")) 481 // throw TGError(Loc, "reg0 used for result that is not an " 482 // "OptionalDefOperand!"); 483 484 ResOp = ResultOperand(static_cast<Record*>(0)); 485 return true; 486 } 487 488 // Literal integers. 489 if (IntInit *II = dynamic_cast<IntInit*>(Arg)) { 490 if (hasSubOps || !InstOpRec->isSubClassOf("Operand")) 491 return false; 492 // Integer arguments can't have names. 493 if (!Result->getArgName(AliasOpNo).empty()) 494 throw TGError(Loc, "result argument #" + utostr(AliasOpNo) + 495 " must not have a name!"); 496 ResOp = ResultOperand(II->getValue()); 497 return true; 498 } 499 500 // If both are Operands with the same MVT, allow the conversion. It's 501 // up to the user to make sure the values are appropriate, just like 502 // for isel Pat's. 503 if (InstOpRec->isSubClassOf("Operand") && 504 ADI->getDef()->isSubClassOf("Operand")) { 505 // FIXME: What other attributes should we check here? Identical 506 // MIOperandInfo perhaps? 507 if (InstOpRec->getValueInit("Type") != ADI->getDef()->getValueInit("Type")) 508 return false; 509 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 510 return true; 511 } 512 513 return false; 514 } 515 516 CodeGenInstAlias::CodeGenInstAlias(Record *R, CodeGenTarget &T) : TheDef(R) { 517 AsmString = R->getValueAsString("AsmString"); 518 Result = R->getValueAsDag("ResultInst"); 519 520 // Verify that the root of the result is an instruction. 521 DefInit *DI = dynamic_cast<DefInit*>(Result->getOperator()); 522 if (DI == 0 || !DI->getDef()->isSubClassOf("Instruction")) 523 throw TGError(R->getLoc(), "result of inst alias should be an instruction"); 524 525 ResultInst = &T.getInstruction(DI->getDef()); 526 527 // NameClass - If argument names are repeated, we need to verify they have 528 // the same class. 529 StringMap<Record*> NameClass; 530 for (unsigned i = 0, e = Result->getNumArgs(); i != e; ++i) { 531 DefInit *ADI = dynamic_cast<DefInit*>(Result->getArg(i)); 532 if (!ADI || Result->getArgName(i).empty()) 533 continue; 534 // Verify we don't have something like: (someinst GR16:$foo, GR32:$foo) 535 // $foo can exist multiple times in the result list, but it must have the 536 // same type. 537 Record *&Entry = NameClass[Result->getArgName(i)]; 538 if (Entry && Entry != ADI->getDef()) 539 throw TGError(R->getLoc(), "result value $" + Result->getArgName(i) + 540 " is both " + Entry->getName() + " and " + 541 ADI->getDef()->getName() + "!"); 542 Entry = ADI->getDef(); 543 } 544 545 // Decode and validate the arguments of the result. 546 unsigned AliasOpNo = 0; 547 for (unsigned i = 0, e = ResultInst->Operands.size(); i != e; ++i) { 548 549 // Tied registers don't have an entry in the result dag unless they're part 550 // of a complex operand, in which case we include them anyways, as we 551 // don't have any other way to specify the whole operand. 552 if (ResultInst->Operands[i].MINumOperands == 1 && 553 ResultInst->Operands[i].getTiedRegister() != -1) 554 continue; 555 556 if (AliasOpNo >= Result->getNumArgs()) 557 throw TGError(R->getLoc(), "not enough arguments for instruction!"); 558 559 Record *InstOpRec = ResultInst->Operands[i].Rec; 560 unsigned NumSubOps = ResultInst->Operands[i].MINumOperands; 561 ResultOperand ResOp(static_cast<int64_t>(0)); 562 if (tryAliasOpMatch(Result, AliasOpNo, InstOpRec, (NumSubOps > 1), 563 R->getLoc(), T, ResOp)) { 564 // If this is a simple operand, or a complex operand with a custom match 565 // class, then we can match is verbatim. 566 if (NumSubOps == 1 || 567 (InstOpRec->getValue("ParserMatchClass") && 568 InstOpRec->getValueAsDef("ParserMatchClass") 569 ->getValueAsString("Name") != "Imm")) { 570 ResultOperands.push_back(ResOp); 571 ResultInstOperandIndex.push_back(std::make_pair(i, -1)); 572 ++AliasOpNo; 573 574 // Otherwise, we need to match each of the suboperands individually. 575 } else { 576 DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo; 577 for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) { 578 Record *SubRec = dynamic_cast<DefInit*>(MIOI->getArg(SubOp))->getDef(); 579 580 // Take care to instantiate each of the suboperands with the correct 581 // nomenclature: $foo.bar 582 ResultOperands.push_back( 583 ResultOperand(Result->getArgName(AliasOpNo) + "." + 584 MIOI->getArgName(SubOp), SubRec)); 585 ResultInstOperandIndex.push_back(std::make_pair(i, SubOp)); 586 } 587 ++AliasOpNo; 588 } 589 continue; 590 } 591 592 // If the argument did not match the instruction operand, and the operand 593 // is composed of multiple suboperands, try matching the suboperands. 594 if (NumSubOps > 1) { 595 DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo; 596 for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) { 597 if (AliasOpNo >= Result->getNumArgs()) 598 throw TGError(R->getLoc(), "not enough arguments for instruction!"); 599 Record *SubRec = dynamic_cast<DefInit*>(MIOI->getArg(SubOp))->getDef(); 600 if (tryAliasOpMatch(Result, AliasOpNo, SubRec, false, 601 R->getLoc(), T, ResOp)) { 602 ResultOperands.push_back(ResOp); 603 ResultInstOperandIndex.push_back(std::make_pair(i, SubOp)); 604 ++AliasOpNo; 605 } else { 606 throw TGError(R->getLoc(), "result argument #" + utostr(AliasOpNo) + 607 " does not match instruction operand class " + 608 (SubOp == 0 ? InstOpRec->getName() :SubRec->getName())); 609 } 610 } 611 continue; 612 } 613 throw TGError(R->getLoc(), "result argument #" + utostr(AliasOpNo) + 614 " does not match instruction operand class " + 615 InstOpRec->getName()); 616 } 617 618 if (AliasOpNo != Result->getNumArgs()) 619 throw TGError(R->getLoc(), "too many operands for instruction!"); 620 } 621