CodeGenInstruction.cpp revision 376a8a773e38fdcd9102a40e08ab1e0661d645d9
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> 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 = 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/// 134unsigned 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 '$" + 138 Name.str() + "'!"; 139} 140 141/// hasOperandNamed - Query whether the instruction has an operand of the 142/// given name. If so, return true and set OpIdx to the index of the 143/// operand. Otherwise, return false. 144bool CGIOperandList::hasOperandNamed(StringRef Name, unsigned &OpIdx) const { 145 assert(!Name.empty() && "Cannot search for operand with no name!"); 146 for (unsigned i = 0, e = OperandList.size(); i != e; ++i) 147 if (OperandList[i].Name == Name) { 148 OpIdx = i; 149 return true; 150 } 151 return false; 152} 153 154std::pair<unsigned,unsigned> 155CGIOperandList::ParseOperandName(const std::string &Op, bool AllowWholeOp) { 156 if (Op.empty() || Op[0] != '$') 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 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 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 251static 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 268void 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 290CodeGenInstruction::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 isSelect = R->getValueAsBit("isSelect"); 301 isBarrier = R->getValueAsBit("isBarrier"); 302 isCall = R->getValueAsBit("isCall"); 303 canFoldAsLoad = R->getValueAsBit("canFoldAsLoad"); 304 mayLoad = R->getValueAsBit("mayLoad"); 305 mayStore = R->getValueAsBit("mayStore"); 306 isPredicable = Operands.isPredicable || R->getValueAsBit("isPredicable"); 307 isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress"); 308 isCommutable = R->getValueAsBit("isCommutable"); 309 isTerminator = R->getValueAsBit("isTerminator"); 310 isReMaterializable = R->getValueAsBit("isReMaterializable"); 311 hasDelaySlot = R->getValueAsBit("hasDelaySlot"); 312 usesCustomInserter = R->getValueAsBit("usesCustomInserter"); 313 hasPostISelHook = R->getValueAsBit("hasPostISelHook"); 314 hasCtrlDep = R->getValueAsBit("hasCtrlDep"); 315 isNotDuplicable = R->getValueAsBit("isNotDuplicable"); 316 hasSideEffects = R->getValueAsBit("hasSideEffects"); 317 neverHasSideEffects = R->getValueAsBit("neverHasSideEffects"); 318 isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove"); 319 hasExtraSrcRegAllocReq = R->getValueAsBit("hasExtraSrcRegAllocReq"); 320 hasExtraDefRegAllocReq = R->getValueAsBit("hasExtraDefRegAllocReq"); 321 isCodeGenOnly = R->getValueAsBit("isCodeGenOnly"); 322 isPseudo = R->getValueAsBit("isPseudo"); 323 ImplicitDefs = R->getValueAsListOfDefs("Defs"); 324 ImplicitUses = R->getValueAsListOfDefs("Uses"); 325 326 if (neverHasSideEffects + hasSideEffects > 1) 327 throw R->getName() + ": multiple conflicting side-effect flags set!"; 328 329 // Parse Constraints. 330 ParseConstraints(R->getValueAsString("Constraints"), Operands); 331 332 // Parse the DisableEncoding field. 333 Operands.ProcessDisableEncoding(R->getValueAsString("DisableEncoding")); 334} 335 336/// HasOneImplicitDefWithKnownVT - If the instruction has at least one 337/// implicit def and it has a known VT, return the VT, otherwise return 338/// MVT::Other. 339MVT::SimpleValueType CodeGenInstruction:: 340HasOneImplicitDefWithKnownVT(const CodeGenTarget &TargetInfo) const { 341 if (ImplicitDefs.empty()) return MVT::Other; 342 343 // Check to see if the first implicit def has a resolvable type. 344 Record *FirstImplicitDef = ImplicitDefs[0]; 345 assert(FirstImplicitDef->isSubClassOf("Register")); 346 const std::vector<MVT::SimpleValueType> &RegVTs = 347 TargetInfo.getRegisterVTs(FirstImplicitDef); 348 if (RegVTs.size() == 1) 349 return RegVTs[0]; 350 return MVT::Other; 351} 352 353 354/// FlattenAsmStringVariants - Flatten the specified AsmString to only 355/// include text from the specified variant, returning the new string. 356std::string CodeGenInstruction:: 357FlattenAsmStringVariants(StringRef Cur, unsigned Variant) { 358 std::string Res = ""; 359 360 for (;;) { 361 // Find the start of the next variant string. 362 size_t VariantsStart = 0; 363 for (size_t e = Cur.size(); VariantsStart != e; ++VariantsStart) 364 if (Cur[VariantsStart] == '{' && 365 (VariantsStart == 0 || (Cur[VariantsStart-1] != '$' && 366 Cur[VariantsStart-1] != '\\'))) 367 break; 368 369 // Add the prefix to the result. 370 Res += Cur.slice(0, VariantsStart); 371 if (VariantsStart == Cur.size()) 372 break; 373 374 ++VariantsStart; // Skip the '{'. 375 376 // Scan to the end of the variants string. 377 size_t VariantsEnd = VariantsStart; 378 unsigned NestedBraces = 1; 379 for (size_t e = Cur.size(); VariantsEnd != e; ++VariantsEnd) { 380 if (Cur[VariantsEnd] == '}' && Cur[VariantsEnd-1] != '\\') { 381 if (--NestedBraces == 0) 382 break; 383 } else if (Cur[VariantsEnd] == '{') 384 ++NestedBraces; 385 } 386 387 // Select the Nth variant (or empty). 388 StringRef Selection = Cur.slice(VariantsStart, VariantsEnd); 389 for (unsigned i = 0; i != Variant; ++i) 390 Selection = Selection.split('|').second; 391 Res += Selection.split('|').first; 392 393 assert(VariantsEnd != Cur.size() && 394 "Unterminated variants in assembly string!"); 395 Cur = Cur.substr(VariantsEnd + 1); 396 } 397 398 return Res; 399} 400 401 402//===----------------------------------------------------------------------===// 403/// CodeGenInstAlias Implementation 404//===----------------------------------------------------------------------===// 405 406/// tryAliasOpMatch - This is a helper function for the CodeGenInstAlias 407/// constructor. It checks if an argument in an InstAlias pattern matches 408/// the corresponding operand of the instruction. It returns true on a 409/// successful match, with ResOp set to the result operand to be used. 410bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo, 411 Record *InstOpRec, bool hasSubOps, 412 ArrayRef<SMLoc> Loc, CodeGenTarget &T, 413 ResultOperand &ResOp) { 414 Init *Arg = Result->getArg(AliasOpNo); 415 DefInit *ADI = dynamic_cast<DefInit*>(Arg); 416 417 if (ADI && ADI->getDef() == InstOpRec) { 418 // If the operand is a record, it must have a name, and the record type 419 // must match up with the instruction's argument type. 420 if (Result->getArgName(AliasOpNo).empty()) 421 throw TGError(Loc, "result argument #" + utostr(AliasOpNo) + 422 " must have a name!"); 423 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 424 return true; 425 } 426 427 // For register operands, the source register class can be a subclass 428 // of the instruction register class, not just an exact match. 429 if (ADI && ADI->getDef()->isSubClassOf("RegisterClass")) { 430 if (!InstOpRec->isSubClassOf("RegisterClass")) 431 return false; 432 if (!T.getRegisterClass(InstOpRec) 433 .hasSubClass(&T.getRegisterClass(ADI->getDef()))) 434 return false; 435 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 436 return true; 437 } 438 439 // Handle explicit registers. 440 if (ADI && ADI->getDef()->isSubClassOf("Register")) { 441 if (InstOpRec->isSubClassOf("OptionalDefOperand")) { 442 DagInit *DI = InstOpRec->getValueAsDag("MIOperandInfo"); 443 // The operand info should only have a single (register) entry. We 444 // want the register class of it. 445 InstOpRec = dynamic_cast<DefInit*>(DI->getArg(0))->getDef(); 446 } 447 448 if (InstOpRec->isSubClassOf("RegisterOperand")) 449 InstOpRec = InstOpRec->getValueAsDef("RegClass"); 450 451 if (!InstOpRec->isSubClassOf("RegisterClass")) 452 return false; 453 454 if (!T.getRegisterClass(InstOpRec) 455 .contains(T.getRegBank().getReg(ADI->getDef()))) 456 throw TGError(Loc, "fixed register " + ADI->getDef()->getName() + 457 " is not a member of the " + InstOpRec->getName() + 458 " register class!"); 459 460 if (!Result->getArgName(AliasOpNo).empty()) 461 throw TGError(Loc, "result fixed register argument must " 462 "not have a name!"); 463 464 ResOp = ResultOperand(ADI->getDef()); 465 return true; 466 } 467 468 // Handle "zero_reg" for optional def operands. 469 if (ADI && ADI->getDef()->getName() == "zero_reg") { 470 471 // Check if this is an optional def. 472 // Tied operands where the source is a sub-operand of a complex operand 473 // need to represent both operands in the alias destination instruction. 474 // Allow zero_reg for the tied portion. This can and should go away once 475 // the MC representation of things doesn't use tied operands at all. 476 //if (!InstOpRec->isSubClassOf("OptionalDefOperand")) 477 // throw TGError(Loc, "reg0 used for result that is not an " 478 // "OptionalDefOperand!"); 479 480 ResOp = ResultOperand(static_cast<Record*>(0)); 481 return true; 482 } 483 484 // Literal integers. 485 if (IntInit *II = dynamic_cast<IntInit*>(Arg)) { 486 if (hasSubOps || !InstOpRec->isSubClassOf("Operand")) 487 return false; 488 // Integer arguments can't have names. 489 if (!Result->getArgName(AliasOpNo).empty()) 490 throw TGError(Loc, "result argument #" + utostr(AliasOpNo) + 491 " must not have a name!"); 492 ResOp = ResultOperand(II->getValue()); 493 return true; 494 } 495 496 // If both are Operands with the same MVT, allow the conversion. It's 497 // up to the user to make sure the values are appropriate, just like 498 // for isel Pat's. 499 if (InstOpRec->isSubClassOf("Operand") && 500 ADI->getDef()->isSubClassOf("Operand")) { 501 // FIXME: What other attributes should we check here? Identical 502 // MIOperandInfo perhaps? 503 if (InstOpRec->getValueInit("Type") != ADI->getDef()->getValueInit("Type")) 504 return false; 505 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); 506 return true; 507 } 508 509 return false; 510} 511 512CodeGenInstAlias::CodeGenInstAlias(Record *R, CodeGenTarget &T) : TheDef(R) { 513 AsmString = R->getValueAsString("AsmString"); 514 Result = R->getValueAsDag("ResultInst"); 515 516 // Verify that the root of the result is an instruction. 517 DefInit *DI = dynamic_cast<DefInit*>(Result->getOperator()); 518 if (DI == 0 || !DI->getDef()->isSubClassOf("Instruction")) 519 throw TGError(R->getLoc(), "result of inst alias should be an instruction"); 520 521 ResultInst = &T.getInstruction(DI->getDef()); 522 523 // NameClass - If argument names are repeated, we need to verify they have 524 // the same class. 525 StringMap<Record*> NameClass; 526 for (unsigned i = 0, e = Result->getNumArgs(); i != e; ++i) { 527 DefInit *ADI = dynamic_cast<DefInit*>(Result->getArg(i)); 528 if (!ADI || Result->getArgName(i).empty()) 529 continue; 530 // Verify we don't have something like: (someinst GR16:$foo, GR32:$foo) 531 // $foo can exist multiple times in the result list, but it must have the 532 // same type. 533 Record *&Entry = NameClass[Result->getArgName(i)]; 534 if (Entry && Entry != ADI->getDef()) 535 throw TGError(R->getLoc(), "result value $" + Result->getArgName(i) + 536 " is both " + Entry->getName() + " and " + 537 ADI->getDef()->getName() + "!"); 538 Entry = ADI->getDef(); 539 } 540 541 // Decode and validate the arguments of the result. 542 unsigned AliasOpNo = 0; 543 for (unsigned i = 0, e = ResultInst->Operands.size(); i != e; ++i) { 544 545 // Tied registers don't have an entry in the result dag unless they're part 546 // of a complex operand, in which case we include them anyways, as we 547 // don't have any other way to specify the whole operand. 548 if (ResultInst->Operands[i].MINumOperands == 1 && 549 ResultInst->Operands[i].getTiedRegister() != -1) 550 continue; 551 552 if (AliasOpNo >= Result->getNumArgs()) 553 throw TGError(R->getLoc(), "not enough arguments for instruction!"); 554 555 Record *InstOpRec = ResultInst->Operands[i].Rec; 556 unsigned NumSubOps = ResultInst->Operands[i].MINumOperands; 557 ResultOperand ResOp(static_cast<int64_t>(0)); 558 if (tryAliasOpMatch(Result, AliasOpNo, InstOpRec, (NumSubOps > 1), 559 R->getLoc(), T, ResOp)) { 560 // If this is a simple operand, or a complex operand with a custom match 561 // class, then we can match is verbatim. 562 if (NumSubOps == 1 || 563 (InstOpRec->getValue("ParserMatchClass") && 564 InstOpRec->getValueAsDef("ParserMatchClass") 565 ->getValueAsString("Name") != "Imm")) { 566 ResultOperands.push_back(ResOp); 567 ResultInstOperandIndex.push_back(std::make_pair(i, -1)); 568 ++AliasOpNo; 569 570 // Otherwise, we need to match each of the suboperands individually. 571 } else { 572 DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo; 573 for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) { 574 Record *SubRec = dynamic_cast<DefInit*>(MIOI->getArg(SubOp))->getDef(); 575 576 // Take care to instantiate each of the suboperands with the correct 577 // nomenclature: $foo.bar 578 ResultOperands.push_back( 579 ResultOperand(Result->getArgName(AliasOpNo) + "." + 580 MIOI->getArgName(SubOp), SubRec)); 581 ResultInstOperandIndex.push_back(std::make_pair(i, SubOp)); 582 } 583 ++AliasOpNo; 584 } 585 continue; 586 } 587 588 // If the argument did not match the instruction operand, and the operand 589 // is composed of multiple suboperands, try matching the suboperands. 590 if (NumSubOps > 1) { 591 DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo; 592 for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) { 593 if (AliasOpNo >= Result->getNumArgs()) 594 throw TGError(R->getLoc(), "not enough arguments for instruction!"); 595 Record *SubRec = dynamic_cast<DefInit*>(MIOI->getArg(SubOp))->getDef(); 596 if (tryAliasOpMatch(Result, AliasOpNo, SubRec, false, 597 R->getLoc(), T, ResOp)) { 598 ResultOperands.push_back(ResOp); 599 ResultInstOperandIndex.push_back(std::make_pair(i, SubOp)); 600 ++AliasOpNo; 601 } else { 602 throw TGError(R->getLoc(), "result argument #" + utostr(AliasOpNo) + 603 " does not match instruction operand class " + 604 (SubOp == 0 ? InstOpRec->getName() :SubRec->getName())); 605 } 606 } 607 continue; 608 } 609 throw TGError(R->getLoc(), "result argument #" + utostr(AliasOpNo) + 610 " does not match instruction operand class " + 611 InstOpRec->getName()); 612 } 613 614 if (AliasOpNo != Result->getNumArgs()) 615 throw TGError(R->getLoc(), "too many operands for instruction!"); 616} 617