1 //===- CodeGenInstruction.cpp - CodeGen Instruction Class Wrapper ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the CodeGenInstruction class.
12 //===----------------------------------------------------------------------===//
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"
24 //===----------------------------------------------------------------------===//
25 // CGIOperandList Implementation
26 //===----------------------------------------------------------------------===//
28 CGIOperandList::CGIOperandList(Record *R) : TheDef(R) {
30 hasOptionalDef = false;
33 DagInit *OutDI = R->getValueAsDag("OutOperandList");
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'");
39 PrintFatalError(R->getName() + ": invalid output list: use 'outs'");
41 NumDefs = OutDI->getNumArgs();
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'");
48 PrintFatalError(R->getName() + ": invalid input list: use 'ins'");
50 unsigned MIOperandNo = 0;
51 std::set<std::string> OperandNames;
52 for (unsigned i = 0, e = InDI->getNumArgs()+OutDI->getNumArgs(); i != e; ++i){
56 ArgInit = OutDI->getArg(i);
57 ArgName = OutDI->getArgName(i);
59 ArgInit = InDI->getArg(i-NumDefs);
60 ArgName = InDI->getArgName(i-NumDefs);
63 DefInit *Arg = dyn_cast<DefInit>(ArgInit);
65 PrintFatalError("Illegal operand for the '" + R->getName() + "' instruction!");
67 Record *Rec = Arg->getDef();
68 std::string PrintMethod = "printOperand";
69 std::string EncoderMethod;
70 std::string OperandType = "OPERAND_UNKNOWN";
72 DagInit *MIOpInfo = nullptr;
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");
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() +
88 // If we have MIOpInfo, then we have #operands equal to number of entries
90 if (unsigned NumArgs = MIOpInfo->getNumArgs())
93 if (Rec->isSubClassOf("PredicateOp"))
95 else if (Rec->isSubClassOf("OptionalDefOperand"))
96 hasOptionalDef = true;
97 } else if (Rec->getName() == "variable_ops") {
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!");
107 // Check that the operand has a name and that it's unique.
109 PrintFatalError("In instruction '" + R->getName() + "', operand #" +
110 Twine(i) + " has no name!");
111 if (!OperandNames.insert(ArgName).second)
112 PrintFatalError("In instruction '" + R->getName() + "', operand #" +
113 Twine(i) + " has the same name as a previous operand!");
115 OperandList.push_back(OperandInfo(Rec, ArgName, PrintMethod, EncoderMethod,
116 OperandType, MIOperandNo, NumOps,
118 MIOperandNo += NumOps;
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);
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.
133 unsigned CGIOperandList::getOperandNamed(StringRef Name) const {
135 if (hasOperandNamed(Name, OpIdx)) return OpIdx;
136 PrintFatalError("'" + TheDef->getName() +
137 "' does not have an operand named '$" + Name + "'!");
140 /// hasOperandNamed - Query whether the instruction has an operand of the
141 /// given name. If so, return true and set OpIdx to the index of the
142 /// operand. Otherwise, return false.
143 bool CGIOperandList::hasOperandNamed(StringRef Name, unsigned &OpIdx) const {
144 assert(!Name.empty() && "Cannot search for operand with no name!");
145 for (unsigned i = 0, e = OperandList.size(); i != e; ++i)
146 if (OperandList[i].Name == Name) {
153 std::pair<unsigned,unsigned>
154 CGIOperandList::ParseOperandName(const std::string &Op, bool AllowWholeOp) {
155 if (Op.empty() || Op[0] != '$')
156 PrintFatalError(TheDef->getName() + ": Illegal operand name: '" + Op + "'");
158 std::string OpName = Op.substr(1);
159 std::string SubOpName;
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);
170 unsigned OpIdx = getOperandNamed(OpName);
172 if (SubOpName.empty()) { // If no suboperand name was specified:
173 // If one was needed, throw.
174 if (OperandList[OpIdx].MINumOperands > 1 && !AllowWholeOp &&
176 PrintFatalError(TheDef->getName() + ": Illegal to refer to"
177 " whole operand part of complex operand '" + Op + "'");
179 // Otherwise, return the operand.
180 return std::make_pair(OpIdx, 0U);
183 // Find the suboperand number involved.
184 DagInit *MIOpInfo = OperandList[OpIdx].MIOperandInfo;
186 PrintFatalError(TheDef->getName() + ": unknown suboperand name in '" + Op + "'");
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);
193 // Otherwise, didn't find it!
194 PrintFatalError(TheDef->getName() + ": unknown suboperand name in '" + Op + "'");
195 return std::make_pair(0U, 0U);
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 PrintFatalError("Illegal format for @earlyclobber constraint: '" + CStr + "'");
208 Name = Name.substr(wpos);
209 std::pair<unsigned,unsigned> Op = Ops.ParseOperandName(Name, false);
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();
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);
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);
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 + "'");
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);
244 unsigned FlatOpNo = Ops.getFlattenedOperandNumber(SrcOp);
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);
253 static void ParseConstraints(const std::string &CStr, CGIOperandList &Ops) {
254 if (CStr.empty()) return;
256 const std::string delims(",");
257 std::string::size_type bidx, eidx;
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();
265 ParseConstraint(CStr.substr(bidx, eidx - bidx), Ops);
266 bidx = CStr.find_first_not_of(delims, eidx);
270 void CGIOperandList::ProcessDisableEncoding(std::string DisableEncoding) {
272 std::pair<StringRef, StringRef> P = getToken(DisableEncoding, " ,\t");
273 std::string OpName = P.first;
274 DisableEncoding = P.second;
275 if (OpName.empty()) break;
277 // Figure out which operand this is.
278 std::pair<unsigned,unsigned> Op = ParseOperandName(OpName, false);
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;
288 //===----------------------------------------------------------------------===//
289 // CodeGenInstruction Implementation
290 //===----------------------------------------------------------------------===//
292 CodeGenInstruction::CodeGenInstruction(Record *R)
293 : TheDef(R), Operands(R), InferredFrom(nullptr) {
294 Namespace = R->getValueAsString("Namespace");
295 AsmString = R->getValueAsString("AsmString");
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");
319 mayLoad = R->getValueAsBitOrUnset("mayLoad", Unset);
320 mayLoad_Unset = Unset;
321 mayStore = R->getValueAsBitOrUnset("mayStore", Unset);
322 mayStore_Unset = Unset;
323 hasSideEffects = R->getValueAsBitOrUnset("hasSideEffects", Unset);
324 hasSideEffects_Unset = Unset;
325 neverHasSideEffects = R->getValueAsBit("neverHasSideEffects");
327 isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove");
328 hasExtraSrcRegAllocReq = R->getValueAsBit("hasExtraSrcRegAllocReq");
329 hasExtraDefRegAllocReq = R->getValueAsBit("hasExtraDefRegAllocReq");
330 isCodeGenOnly = R->getValueAsBit("isCodeGenOnly");
331 isPseudo = R->getValueAsBit("isPseudo");
332 ImplicitDefs = R->getValueAsListOfDefs("Defs");
333 ImplicitUses = R->getValueAsListOfDefs("Uses");
335 if (neverHasSideEffects + hasSideEffects > 1)
336 PrintFatalError(R->getName() + ": multiple conflicting side-effect flags set!");
338 // Parse Constraints.
339 ParseConstraints(R->getValueAsString("Constraints"), Operands);
341 // Parse the DisableEncoding field.
342 Operands.ProcessDisableEncoding(R->getValueAsString("DisableEncoding"));
344 // First check for a ComplexDeprecationPredicate.
345 if (R->getValue("ComplexDeprecationPredicate")) {
346 HasComplexDeprecationPredicate = true;
347 DeprecatedReason = R->getValueAsString("ComplexDeprecationPredicate");
348 } else if (RecordVal *Dep = R->getValue("DeprecatedFeatureMask")) {
349 // Check if we have a Subtarget feature mask.
350 HasComplexDeprecationPredicate = false;
351 DeprecatedReason = Dep->getValue()->getAsString();
353 // This instruction isn't deprecated.
354 HasComplexDeprecationPredicate = false;
355 DeprecatedReason = "";
359 /// HasOneImplicitDefWithKnownVT - If the instruction has at least one
360 /// implicit def and it has a known VT, return the VT, otherwise return
362 MVT::SimpleValueType CodeGenInstruction::
363 HasOneImplicitDefWithKnownVT(const CodeGenTarget &TargetInfo) const {
364 if (ImplicitDefs.empty()) return MVT::Other;
366 // Check to see if the first implicit def has a resolvable type.
367 Record *FirstImplicitDef = ImplicitDefs[0];
368 assert(FirstImplicitDef->isSubClassOf("Register"));
369 const std::vector<MVT::SimpleValueType> &RegVTs =
370 TargetInfo.getRegisterVTs(FirstImplicitDef);
371 if (RegVTs.size() == 1)
377 /// FlattenAsmStringVariants - Flatten the specified AsmString to only
378 /// include text from the specified variant, returning the new string.
379 std::string CodeGenInstruction::
380 FlattenAsmStringVariants(StringRef Cur, unsigned Variant) {
381 std::string Res = "";
384 // Find the start of the next variant string.
385 size_t VariantsStart = 0;
386 for (size_t e = Cur.size(); VariantsStart != e; ++VariantsStart)
387 if (Cur[VariantsStart] == '{' &&
388 (VariantsStart == 0 || (Cur[VariantsStart-1] != '$' &&
389 Cur[VariantsStart-1] != '\\')))
392 // Add the prefix to the result.
393 Res += Cur.slice(0, VariantsStart);
394 if (VariantsStart == Cur.size())
397 ++VariantsStart; // Skip the '{'.
399 // Scan to the end of the variants string.
400 size_t VariantsEnd = VariantsStart;
401 unsigned NestedBraces = 1;
402 for (size_t e = Cur.size(); VariantsEnd != e; ++VariantsEnd) {
403 if (Cur[VariantsEnd] == '}' && Cur[VariantsEnd-1] != '\\') {
404 if (--NestedBraces == 0)
406 } else if (Cur[VariantsEnd] == '{')
410 // Select the Nth variant (or empty).
411 StringRef Selection = Cur.slice(VariantsStart, VariantsEnd);
412 for (unsigned i = 0; i != Variant; ++i)
413 Selection = Selection.split('|').second;
414 Res += Selection.split('|').first;
416 assert(VariantsEnd != Cur.size() &&
417 "Unterminated variants in assembly string!");
418 Cur = Cur.substr(VariantsEnd + 1);
425 //===----------------------------------------------------------------------===//
426 /// CodeGenInstAlias Implementation
427 //===----------------------------------------------------------------------===//
429 /// tryAliasOpMatch - This is a helper function for the CodeGenInstAlias
430 /// constructor. It checks if an argument in an InstAlias pattern matches
431 /// the corresponding operand of the instruction. It returns true on a
432 /// successful match, with ResOp set to the result operand to be used.
433 bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo,
434 Record *InstOpRec, bool hasSubOps,
435 ArrayRef<SMLoc> Loc, CodeGenTarget &T,
436 ResultOperand &ResOp) {
437 Init *Arg = Result->getArg(AliasOpNo);
438 DefInit *ADI = dyn_cast<DefInit>(Arg);
439 Record *ResultRecord = ADI ? ADI->getDef() : nullptr;
441 if (ADI && ADI->getDef() == InstOpRec) {
442 // If the operand is a record, it must have a name, and the record type
443 // must match up with the instruction's argument type.
444 if (Result->getArgName(AliasOpNo).empty())
445 PrintFatalError(Loc, "result argument #" + Twine(AliasOpNo) +
446 " must have a name!");
447 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ResultRecord);
451 // For register operands, the source register class can be a subclass
452 // of the instruction register class, not just an exact match.
453 if (InstOpRec->isSubClassOf("RegisterOperand"))
454 InstOpRec = InstOpRec->getValueAsDef("RegClass");
456 if (ADI && ADI->getDef()->isSubClassOf("RegisterOperand"))
457 ADI = ADI->getDef()->getValueAsDef("RegClass")->getDefInit();
459 if (ADI && ADI->getDef()->isSubClassOf("RegisterClass")) {
460 if (!InstOpRec->isSubClassOf("RegisterClass"))
462 if (!T.getRegisterClass(InstOpRec)
463 .hasSubClass(&T.getRegisterClass(ADI->getDef())))
465 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ResultRecord);
469 // Handle explicit registers.
470 if (ADI && ADI->getDef()->isSubClassOf("Register")) {
471 if (InstOpRec->isSubClassOf("OptionalDefOperand")) {
472 DagInit *DI = InstOpRec->getValueAsDag("MIOperandInfo");
473 // The operand info should only have a single (register) entry. We
474 // want the register class of it.
475 InstOpRec = cast<DefInit>(DI->getArg(0))->getDef();
478 if (!InstOpRec->isSubClassOf("RegisterClass"))
481 if (!T.getRegisterClass(InstOpRec)
482 .contains(T.getRegBank().getReg(ADI->getDef())))
483 PrintFatalError(Loc, "fixed register " + ADI->getDef()->getName() +
484 " is not a member of the " + InstOpRec->getName() +
487 if (!Result->getArgName(AliasOpNo).empty())
488 PrintFatalError(Loc, "result fixed register argument must "
491 ResOp = ResultOperand(ResultRecord);
495 // Handle "zero_reg" for optional def operands.
496 if (ADI && ADI->getDef()->getName() == "zero_reg") {
498 // Check if this is an optional def.
499 // Tied operands where the source is a sub-operand of a complex operand
500 // need to represent both operands in the alias destination instruction.
501 // Allow zero_reg for the tied portion. This can and should go away once
502 // the MC representation of things doesn't use tied operands at all.
503 //if (!InstOpRec->isSubClassOf("OptionalDefOperand"))
504 // throw TGError(Loc, "reg0 used for result that is not an "
505 // "OptionalDefOperand!");
507 ResOp = ResultOperand(static_cast<Record*>(nullptr));
512 if (IntInit *II = dyn_cast<IntInit>(Arg)) {
513 if (hasSubOps || !InstOpRec->isSubClassOf("Operand"))
515 // Integer arguments can't have names.
516 if (!Result->getArgName(AliasOpNo).empty())
517 PrintFatalError(Loc, "result argument #" + Twine(AliasOpNo) +
518 " must not have a name!");
519 ResOp = ResultOperand(II->getValue());
523 // If both are Operands with the same MVT, allow the conversion. It's
524 // up to the user to make sure the values are appropriate, just like
526 if (InstOpRec->isSubClassOf("Operand") &&
527 ADI->getDef()->isSubClassOf("Operand")) {
528 // FIXME: What other attributes should we check here? Identical
529 // MIOperandInfo perhaps?
530 if (InstOpRec->getValueInit("Type") != ADI->getDef()->getValueInit("Type"))
532 ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef());
539 CodeGenInstAlias::CodeGenInstAlias(Record *R, CodeGenTarget &T) : TheDef(R) {
540 AsmString = R->getValueAsString("AsmString");
541 Result = R->getValueAsDag("ResultInst");
543 // Verify that the root of the result is an instruction.
544 DefInit *DI = dyn_cast<DefInit>(Result->getOperator());
545 if (!DI || !DI->getDef()->isSubClassOf("Instruction"))
546 PrintFatalError(R->getLoc(),
547 "result of inst alias should be an instruction");
549 ResultInst = &T.getInstruction(DI->getDef());
551 // NameClass - If argument names are repeated, we need to verify they have
553 StringMap<Record*> NameClass;
554 for (unsigned i = 0, e = Result->getNumArgs(); i != e; ++i) {
555 DefInit *ADI = dyn_cast<DefInit>(Result->getArg(i));
556 if (!ADI || Result->getArgName(i).empty())
558 // Verify we don't have something like: (someinst GR16:$foo, GR32:$foo)
559 // $foo can exist multiple times in the result list, but it must have the
561 Record *&Entry = NameClass[Result->getArgName(i)];
562 if (Entry && Entry != ADI->getDef())
563 PrintFatalError(R->getLoc(), "result value $" + Result->getArgName(i) +
564 " is both " + Entry->getName() + " and " +
565 ADI->getDef()->getName() + "!");
566 Entry = ADI->getDef();
569 // Decode and validate the arguments of the result.
570 unsigned AliasOpNo = 0;
571 for (unsigned i = 0, e = ResultInst->Operands.size(); i != e; ++i) {
573 // Tied registers don't have an entry in the result dag unless they're part
574 // of a complex operand, in which case we include them anyways, as we
575 // don't have any other way to specify the whole operand.
576 if (ResultInst->Operands[i].MINumOperands == 1 &&
577 ResultInst->Operands[i].getTiedRegister() != -1)
580 if (AliasOpNo >= Result->getNumArgs())
581 PrintFatalError(R->getLoc(), "not enough arguments for instruction!");
583 Record *InstOpRec = ResultInst->Operands[i].Rec;
584 unsigned NumSubOps = ResultInst->Operands[i].MINumOperands;
585 ResultOperand ResOp(static_cast<int64_t>(0));
586 if (tryAliasOpMatch(Result, AliasOpNo, InstOpRec, (NumSubOps > 1),
587 R->getLoc(), T, ResOp)) {
588 // If this is a simple operand, or a complex operand with a custom match
589 // class, then we can match is verbatim.
590 if (NumSubOps == 1 ||
591 (InstOpRec->getValue("ParserMatchClass") &&
592 InstOpRec->getValueAsDef("ParserMatchClass")
593 ->getValueAsString("Name") != "Imm")) {
594 ResultOperands.push_back(ResOp);
595 ResultInstOperandIndex.push_back(std::make_pair(i, -1));
598 // Otherwise, we need to match each of the suboperands individually.
600 DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo;
601 for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) {
602 Record *SubRec = cast<DefInit>(MIOI->getArg(SubOp))->getDef();
604 // Take care to instantiate each of the suboperands with the correct
605 // nomenclature: $foo.bar
606 ResultOperands.push_back(
607 ResultOperand(Result->getArgName(AliasOpNo) + "." +
608 MIOI->getArgName(SubOp), SubRec));
609 ResultInstOperandIndex.push_back(std::make_pair(i, SubOp));
616 // If the argument did not match the instruction operand, and the operand
617 // is composed of multiple suboperands, try matching the suboperands.
619 DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo;
620 for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) {
621 if (AliasOpNo >= Result->getNumArgs())
622 PrintFatalError(R->getLoc(), "not enough arguments for instruction!");
623 Record *SubRec = cast<DefInit>(MIOI->getArg(SubOp))->getDef();
624 if (tryAliasOpMatch(Result, AliasOpNo, SubRec, false,
625 R->getLoc(), T, ResOp)) {
626 ResultOperands.push_back(ResOp);
627 ResultInstOperandIndex.push_back(std::make_pair(i, SubOp));
630 PrintFatalError(R->getLoc(), "result argument #" + Twine(AliasOpNo) +
631 " does not match instruction operand class " +
632 (SubOp == 0 ? InstOpRec->getName() :SubRec->getName()));
637 PrintFatalError(R->getLoc(), "result argument #" + Twine(AliasOpNo) +
638 " does not match instruction operand class " +
639 InstOpRec->getName());
642 if (AliasOpNo != Result->getNumArgs())
643 PrintFatalError(R->getLoc(), "too many operands for instruction!");