diff options
Diffstat (limited to 'contrib/llvm/utils/TableGen/CodeGenInstruction.cpp')
| -rw-r--r-- | contrib/llvm/utils/TableGen/CodeGenInstruction.cpp | 519 |
1 files changed, 375 insertions, 144 deletions
diff --git a/contrib/llvm/utils/TableGen/CodeGenInstruction.cpp b/contrib/llvm/utils/TableGen/CodeGenInstruction.cpp index 01a1fe1..f37d3ea 100644 --- a/contrib/llvm/utils/TableGen/CodeGenInstruction.cpp +++ b/contrib/llvm/utils/TableGen/CodeGenInstruction.cpp @@ -15,120 +15,19 @@ #include "CodeGenTarget.h" #include "Record.h" #include "llvm/ADT/StringExtras.h" +#include "llvm/ADT/StringMap.h" #include "llvm/ADT/STLExtras.h" #include <set> using namespace llvm; -static void ParseConstraint(const std::string &CStr, CodeGenInstruction *I) { - // EARLY_CLOBBER: @early $reg - std::string::size_type wpos = CStr.find_first_of(" \t"); - std::string::size_type start = CStr.find_first_not_of(" \t"); - std::string Tok = CStr.substr(start, wpos - start); - if (Tok == "@earlyclobber") { - std::string Name = CStr.substr(wpos+1); - wpos = Name.find_first_not_of(" \t"); - if (wpos == std::string::npos) - throw "Illegal format for @earlyclobber constraint: '" + CStr + "'"; - Name = Name.substr(wpos); - std::pair<unsigned,unsigned> Op = - I->ParseOperandName(Name, false); - - // Build the string for the operand - if (!I->OperandList[Op.first].Constraints[Op.second].isNone()) - throw "Operand '" + Name + "' cannot have multiple constraints!"; - I->OperandList[Op.first].Constraints[Op.second] = - CodeGenInstruction::ConstraintInfo::getEarlyClobber(); - return; - } - - // Only other constraint is "TIED_TO" for now. - std::string::size_type pos = CStr.find_first_of('='); - assert(pos != std::string::npos && "Unrecognized constraint"); - start = CStr.find_first_not_of(" \t"); - std::string Name = CStr.substr(start, pos - start); - - // TIED_TO: $src1 = $dst - wpos = Name.find_first_of(" \t"); - if (wpos == std::string::npos) - throw "Illegal format for tied-to constraint: '" + CStr + "'"; - std::string DestOpName = Name.substr(0, wpos); - std::pair<unsigned,unsigned> DestOp = I->ParseOperandName(DestOpName, false); - - Name = CStr.substr(pos+1); - wpos = Name.find_first_not_of(" \t"); - if (wpos == std::string::npos) - throw "Illegal format for tied-to constraint: '" + CStr + "'"; - - std::pair<unsigned,unsigned> SrcOp = - I->ParseOperandName(Name.substr(wpos), false); - if (SrcOp > DestOp) - throw "Illegal tied-to operand constraint '" + CStr + "'"; - - - unsigned FlatOpNo = I->getFlattenedOperandNumber(SrcOp); - - if (!I->OperandList[DestOp.first].Constraints[DestOp.second].isNone()) - throw "Operand '" + DestOpName + "' cannot have multiple constraints!"; - I->OperandList[DestOp.first].Constraints[DestOp.second] = - CodeGenInstruction::ConstraintInfo::getTied(FlatOpNo); -} - -static void ParseConstraints(const std::string &CStr, CodeGenInstruction *I) { - // Make sure the constraints list for each operand is large enough to hold - // constraint info, even if none is present. - for (unsigned i = 0, e = I->OperandList.size(); i != e; ++i) - I->OperandList[i].Constraints.resize(I->OperandList[i].MINumOperands); - - if (CStr.empty()) return; - - const std::string delims(","); - std::string::size_type bidx, eidx; - - bidx = CStr.find_first_not_of(delims); - while (bidx != std::string::npos) { - eidx = CStr.find_first_of(delims, bidx); - if (eidx == std::string::npos) - eidx = CStr.length(); - - ParseConstraint(CStr.substr(bidx, eidx - bidx), I); - bidx = CStr.find_first_not_of(delims, eidx); - } -} - -CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr) - : TheDef(R), AsmString(AsmStr) { - Namespace = R->getValueAsString("Namespace"); +//===----------------------------------------------------------------------===// +// CGIOperandList Implementation +//===----------------------------------------------------------------------===// - isReturn = R->getValueAsBit("isReturn"); - isBranch = R->getValueAsBit("isBranch"); - isIndirectBranch = R->getValueAsBit("isIndirectBranch"); - isCompare = R->getValueAsBit("isCompare"); - isBarrier = R->getValueAsBit("isBarrier"); - isCall = R->getValueAsBit("isCall"); - canFoldAsLoad = R->getValueAsBit("canFoldAsLoad"); - mayLoad = R->getValueAsBit("mayLoad"); - mayStore = R->getValueAsBit("mayStore"); - isPredicable = R->getValueAsBit("isPredicable"); - isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress"); - isCommutable = R->getValueAsBit("isCommutable"); - isTerminator = R->getValueAsBit("isTerminator"); - isReMaterializable = R->getValueAsBit("isReMaterializable"); - hasDelaySlot = R->getValueAsBit("hasDelaySlot"); - usesCustomInserter = R->getValueAsBit("usesCustomInserter"); - hasCtrlDep = R->getValueAsBit("hasCtrlDep"); - isNotDuplicable = R->getValueAsBit("isNotDuplicable"); - hasSideEffects = R->getValueAsBit("hasSideEffects"); - neverHasSideEffects = R->getValueAsBit("neverHasSideEffects"); - isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove"); - hasExtraSrcRegAllocReq = R->getValueAsBit("hasExtraSrcRegAllocReq"); - hasExtraDefRegAllocReq = R->getValueAsBit("hasExtraDefRegAllocReq"); +CGIOperandList::CGIOperandList(Record *R) : TheDef(R) { + isPredicable = false; hasOptionalDef = false; isVariadic = false; - ImplicitDefs = R->getValueAsListOfDefs("Defs"); - ImplicitUses = R->getValueAsListOfDefs("Uses"); - - if (neverHasSideEffects + hasSideEffects > 1) - throw R->getName() + ": multiple conflicting side-effect flags set!"; DagInit *OutDI = R->getValueAsDag("OutOperandList"); @@ -137,16 +36,16 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr) throw R->getName() + ": invalid def name for output list: use 'outs'"; } else throw R->getName() + ": invalid output list: use 'outs'"; - + NumDefs = OutDI->getNumArgs(); - + DagInit *InDI = R->getValueAsDag("InOperandList"); if (DefInit *Init = dynamic_cast<DefInit*>(InDI->getOperator())) { if (Init->getDef()->getName() != "ins") throw R->getName() + ": invalid def name for input list: use 'ins'"; } else throw R->getName() + ": invalid input list: use 'ins'"; - + unsigned MIOperandNo = 0; std::set<std::string> OperandNames; for (unsigned i = 0, e = InDI->getNumArgs()+OutDI->getNumArgs(); i != e; ++i){ @@ -159,25 +58,28 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr) ArgInit = InDI->getArg(i-NumDefs); ArgName = InDI->getArgName(i-NumDefs); } - + DefInit *Arg = dynamic_cast<DefInit*>(ArgInit); if (!Arg) throw "Illegal operand for the '" + R->getName() + "' instruction!"; Record *Rec = Arg->getDef(); std::string PrintMethod = "printOperand"; + std::string EncoderMethod; unsigned NumOps = 1; DagInit *MIOpInfo = 0; if (Rec->isSubClassOf("Operand")) { PrintMethod = Rec->getValueAsString("PrintMethod"); + // If there is an explicit encoder method, use it. + EncoderMethod = Rec->getValueAsString("EncoderMethod"); MIOpInfo = Rec->getValueAsDag("MIOperandInfo"); // Verify that MIOpInfo has an 'ops' root value. if (!dynamic_cast<DefInit*>(MIOpInfo->getOperator()) || dynamic_cast<DefInit*>(MIOpInfo->getOperator()) - ->getDef()->getName() != "ops") + ->getDef()->getName() != "ops") throw "Bad value for MIOperandInfo in operand '" + Rec->getName() + - "'\n"; + "'\n"; // If we have MIOpInfo, then we have #operands equal to number of entries // in MIOperandInfo. @@ -192,58 +94,58 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr) isVariadic = true; continue; } else if (!Rec->isSubClassOf("RegisterClass") && - Rec->getName() != "ptr_rc" && Rec->getName() != "unknown") + !Rec->isSubClassOf("PointerLikeRegClass") && + Rec->getName() != "unknown") throw "Unknown operand class '" + Rec->getName() + - "' in '" + R->getName() + "' instruction!"; + "' in '" + R->getName() + "' instruction!"; // Check that the operand has a name and that it's unique. if (ArgName.empty()) throw "In instruction '" + R->getName() + "', operand #" + utostr(i) + - " has no name!"; + " has no name!"; if (!OperandNames.insert(ArgName).second) throw "In instruction '" + R->getName() + "', operand #" + utostr(i) + - " has the same name as a previous operand!"; + " has the same name as a previous operand!"; - OperandList.push_back(OperandInfo(Rec, ArgName, PrintMethod, + OperandList.push_back(OperandInfo(Rec, ArgName, PrintMethod, EncoderMethod, MIOperandNo, NumOps, MIOpInfo)); MIOperandNo += NumOps; } - // Parse Constraints. - ParseConstraints(R->getValueAsString("Constraints"), this); - - // Parse the DisableEncoding field. - std::string DisableEncoding = R->getValueAsString("DisableEncoding"); - while (1) { - std::string OpName; - tie(OpName, DisableEncoding) = getToken(DisableEncoding, " ,\t"); - if (OpName.empty()) break; - - // Figure out which operand this is. - std::pair<unsigned,unsigned> Op = ParseOperandName(OpName, false); - // Mark the operand as not-to-be encoded. - if (Op.second >= OperandList[Op.first].DoNotEncode.size()) - OperandList[Op.first].DoNotEncode.resize(Op.second+1); - OperandList[Op.first].DoNotEncode[Op.second] = true; - } + // Make sure the constraints list for each operand is large enough to hold + // constraint info, even if none is present. + for (unsigned i = 0, e = OperandList.size(); i != e; ++i) + OperandList[i].Constraints.resize(OperandList[i].MINumOperands); } + /// getOperandNamed - Return the index of the operand with the specified /// non-empty name. If the instruction does not have an operand with the /// specified name, throw an exception. /// -unsigned CodeGenInstruction::getOperandNamed(const std::string &Name) const { +unsigned CGIOperandList::getOperandNamed(StringRef Name) const { + unsigned OpIdx; + if (hasOperandNamed(Name, OpIdx)) return OpIdx; + throw "'" + TheDef->getName() + "' does not have an operand named '$" + + Name.str() + "'!"; +} + +/// hasOperandNamed - Query whether the instruction has an operand of the +/// given name. If so, return true and set OpIdx to the index of the +/// operand. Otherwise, return false. +bool CGIOperandList::hasOperandNamed(StringRef Name, unsigned &OpIdx) const { assert(!Name.empty() && "Cannot search for operand with no name!"); for (unsigned i = 0, e = OperandList.size(); i != e; ++i) - if (OperandList[i].Name == Name) return i; - throw "Instruction '" + TheDef->getName() + - "' does not have an operand named '$" + Name + "'!"; + if (OperandList[i].Name == Name) { + OpIdx = i; + return true; + } + return false; } std::pair<unsigned,unsigned> -CodeGenInstruction::ParseOperandName(const std::string &Op, - bool AllowWholeOp) { +CGIOperandList::ParseOperandName(const std::string &Op, bool AllowWholeOp) { if (Op.empty() || Op[0] != '$') throw TheDef->getName() + ": Illegal operand name: '" + Op + "'"; @@ -266,7 +168,7 @@ CodeGenInstruction::ParseOperandName(const std::string &Op, if (OperandList[OpIdx].MINumOperands > 1 && !AllowWholeOp && SubOpName.empty()) throw TheDef->getName() + ": Illegal to refer to" - " whole operand part of complex operand '" + Op + "'"; + " whole operand part of complex operand '" + Op + "'"; // Otherwise, return the operand. return std::make_pair(OpIdx, 0U); @@ -286,6 +188,137 @@ CodeGenInstruction::ParseOperandName(const std::string &Op, throw TheDef->getName() + ": unknown suboperand name in '" + Op + "'"; } +static void ParseConstraint(const std::string &CStr, CGIOperandList &Ops) { + // EARLY_CLOBBER: @early $reg + std::string::size_type wpos = CStr.find_first_of(" \t"); + std::string::size_type start = CStr.find_first_not_of(" \t"); + std::string Tok = CStr.substr(start, wpos - start); + if (Tok == "@earlyclobber") { + std::string Name = CStr.substr(wpos+1); + wpos = Name.find_first_not_of(" \t"); + if (wpos == std::string::npos) + throw "Illegal format for @earlyclobber constraint: '" + CStr + "'"; + Name = Name.substr(wpos); + std::pair<unsigned,unsigned> Op = Ops.ParseOperandName(Name, false); + + // Build the string for the operand + if (!Ops[Op.first].Constraints[Op.second].isNone()) + throw "Operand '" + Name + "' cannot have multiple constraints!"; + Ops[Op.first].Constraints[Op.second] = + CGIOperandList::ConstraintInfo::getEarlyClobber(); + return; + } + + // Only other constraint is "TIED_TO" for now. + std::string::size_type pos = CStr.find_first_of('='); + assert(pos != std::string::npos && "Unrecognized constraint"); + start = CStr.find_first_not_of(" \t"); + std::string Name = CStr.substr(start, pos - start); + + // TIED_TO: $src1 = $dst + wpos = Name.find_first_of(" \t"); + if (wpos == std::string::npos) + throw "Illegal format for tied-to constraint: '" + CStr + "'"; + std::string DestOpName = Name.substr(0, wpos); + std::pair<unsigned,unsigned> DestOp = Ops.ParseOperandName(DestOpName, false); + + Name = CStr.substr(pos+1); + wpos = Name.find_first_not_of(" \t"); + if (wpos == std::string::npos) + throw "Illegal format for tied-to constraint: '" + CStr + "'"; + + std::pair<unsigned,unsigned> SrcOp = + Ops.ParseOperandName(Name.substr(wpos), false); + if (SrcOp > DestOp) + throw "Illegal tied-to operand constraint '" + CStr + "'"; + + + unsigned FlatOpNo = Ops.getFlattenedOperandNumber(SrcOp); + + if (!Ops[DestOp.first].Constraints[DestOp.second].isNone()) + throw "Operand '" + DestOpName + "' cannot have multiple constraints!"; + Ops[DestOp.first].Constraints[DestOp.second] = + CGIOperandList::ConstraintInfo::getTied(FlatOpNo); +} + +static void ParseConstraints(const std::string &CStr, CGIOperandList &Ops) { + if (CStr.empty()) return; + + const std::string delims(","); + std::string::size_type bidx, eidx; + + bidx = CStr.find_first_not_of(delims); + while (bidx != std::string::npos) { + eidx = CStr.find_first_of(delims, bidx); + if (eidx == std::string::npos) + eidx = CStr.length(); + + ParseConstraint(CStr.substr(bidx, eidx - bidx), Ops); + bidx = CStr.find_first_not_of(delims, eidx); + } +} + +void CGIOperandList::ProcessDisableEncoding(std::string DisableEncoding) { + while (1) { + std::string OpName; + tie(OpName, DisableEncoding) = getToken(DisableEncoding, " ,\t"); + if (OpName.empty()) break; + + // Figure out which operand this is. + std::pair<unsigned,unsigned> Op = ParseOperandName(OpName, false); + + // Mark the operand as not-to-be encoded. + if (Op.second >= OperandList[Op.first].DoNotEncode.size()) + OperandList[Op.first].DoNotEncode.resize(Op.second+1); + OperandList[Op.first].DoNotEncode[Op.second] = true; + } + +} + +//===----------------------------------------------------------------------===// +// CodeGenInstruction Implementation +//===----------------------------------------------------------------------===// + +CodeGenInstruction::CodeGenInstruction(Record *R) : TheDef(R), Operands(R) { + Namespace = R->getValueAsString("Namespace"); + AsmString = R->getValueAsString("AsmString"); + + isReturn = R->getValueAsBit("isReturn"); + isBranch = R->getValueAsBit("isBranch"); + isIndirectBranch = R->getValueAsBit("isIndirectBranch"); + isCompare = R->getValueAsBit("isCompare"); + isMoveImm = R->getValueAsBit("isMoveImm"); + isBarrier = R->getValueAsBit("isBarrier"); + isCall = R->getValueAsBit("isCall"); + canFoldAsLoad = R->getValueAsBit("canFoldAsLoad"); + mayLoad = R->getValueAsBit("mayLoad"); + mayStore = R->getValueAsBit("mayStore"); + isPredicable = Operands.isPredicable || R->getValueAsBit("isPredicable"); + isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress"); + isCommutable = R->getValueAsBit("isCommutable"); + isTerminator = R->getValueAsBit("isTerminator"); + isReMaterializable = R->getValueAsBit("isReMaterializable"); + hasDelaySlot = R->getValueAsBit("hasDelaySlot"); + usesCustomInserter = R->getValueAsBit("usesCustomInserter"); + hasCtrlDep = R->getValueAsBit("hasCtrlDep"); + isNotDuplicable = R->getValueAsBit("isNotDuplicable"); + hasSideEffects = R->getValueAsBit("hasSideEffects"); + neverHasSideEffects = R->getValueAsBit("neverHasSideEffects"); + isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove"); + hasExtraSrcRegAllocReq = R->getValueAsBit("hasExtraSrcRegAllocReq"); + hasExtraDefRegAllocReq = R->getValueAsBit("hasExtraDefRegAllocReq"); + ImplicitDefs = R->getValueAsListOfDefs("Defs"); + ImplicitUses = R->getValueAsListOfDefs("Uses"); + + if (neverHasSideEffects + hasSideEffects > 1) + throw R->getName() + ": multiple conflicting side-effect flags set!"; + + // Parse Constraints. + ParseConstraints(R->getValueAsString("Constraints"), Operands); + + // Parse the DisableEncoding field. + Operands.ProcessDisableEncoding(R->getValueAsString("DisableEncoding")); +} /// HasOneImplicitDefWithKnownVT - If the instruction has at least one /// implicit def and it has a known VT, return the VT, otherwise return @@ -293,14 +326,212 @@ CodeGenInstruction::ParseOperandName(const std::string &Op, MVT::SimpleValueType CodeGenInstruction:: HasOneImplicitDefWithKnownVT(const CodeGenTarget &TargetInfo) const { if (ImplicitDefs.empty()) return MVT::Other; - + // Check to see if the first implicit def has a resolvable type. Record *FirstImplicitDef = ImplicitDefs[0]; assert(FirstImplicitDef->isSubClassOf("Register")); - const std::vector<MVT::SimpleValueType> &RegVTs = + const std::vector<MVT::SimpleValueType> &RegVTs = TargetInfo.getRegisterVTs(FirstImplicitDef); if (RegVTs.size() == 1) return RegVTs[0]; return MVT::Other; } + +/// FlattenAsmStringVariants - Flatten the specified AsmString to only +/// include text from the specified variant, returning the new string. +std::string CodeGenInstruction:: +FlattenAsmStringVariants(StringRef Cur, unsigned Variant) { + std::string Res = ""; + + for (;;) { + // Find the start of the next variant string. + size_t VariantsStart = 0; + for (size_t e = Cur.size(); VariantsStart != e; ++VariantsStart) + if (Cur[VariantsStart] == '{' && + (VariantsStart == 0 || (Cur[VariantsStart-1] != '$' && + Cur[VariantsStart-1] != '\\'))) + break; + + // Add the prefix to the result. + Res += Cur.slice(0, VariantsStart); + if (VariantsStart == Cur.size()) + break; + + ++VariantsStart; // Skip the '{'. + + // Scan to the end of the variants string. + size_t VariantsEnd = VariantsStart; + unsigned NestedBraces = 1; + for (size_t e = Cur.size(); VariantsEnd != e; ++VariantsEnd) { + if (Cur[VariantsEnd] == '}' && Cur[VariantsEnd-1] != '\\') { + if (--NestedBraces == 0) + break; + } else if (Cur[VariantsEnd] == '{') + ++NestedBraces; + } + + // Select the Nth variant (or empty). + StringRef Selection = Cur.slice(VariantsStart, VariantsEnd); + for (unsigned i = 0; i != Variant; ++i) + Selection = Selection.split('|').second; + Res += Selection.split('|').first; + + assert(VariantsEnd != Cur.size() && + "Unterminated variants in assembly string!"); + Cur = Cur.substr(VariantsEnd + 1); + } + + return Res; +} + + +//===----------------------------------------------------------------------===// +/// CodeGenInstAlias Implementation +//===----------------------------------------------------------------------===// + +/// tryAliasOpMatch - This is a helper function for the CodeGenInstAlias +/// constructor. It checks if an argument in an InstAlias pattern matches +/// the corresponding operand of the instruction. It returns true on a +/// successful match, with ResOp set to the result operand to be used. +bool CodeGenInstAlias::tryAliasOpMatch(DagInit *Result, unsigned AliasOpNo, + Record *InstOpRec, bool hasSubOps, + SMLoc Loc, CodeGenTarget &T, + ResultOperand &ResOp) { + Init *Arg = Result->getArg(AliasOpNo); + DefInit *ADI = dynamic_cast<DefInit*>(Arg); + + if (ADI && ADI->getDef() == InstOpRec) { + // If the operand is a record, it must have a name, and the record type + // must match up with the instruction's argument type. + if (Result->getArgName(AliasOpNo).empty()) + throw TGError(Loc, "result argument #" + utostr(AliasOpNo) + + " must have a name!"); + ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef()); + return true; + } + + // Handle explicit registers. + if (ADI && ADI->getDef()->isSubClassOf("Register")) { + if (!InstOpRec->isSubClassOf("RegisterClass")) + return false; + + if (!T.getRegisterClass(InstOpRec).containsRegister(ADI->getDef())) + throw TGError(Loc, "fixed register " +ADI->getDef()->getName() + + " is not a member of the " + InstOpRec->getName() + + " register class!"); + + if (!Result->getArgName(AliasOpNo).empty()) + throw TGError(Loc, "result fixed register argument must " + "not have a name!"); + + ResOp = ResultOperand(ADI->getDef()); + return true; + } + + // Handle "zero_reg" for optional def operands. + if (ADI && ADI->getDef()->getName() == "zero_reg") { + + // Check if this is an optional def. + if (!InstOpRec->isSubClassOf("OptionalDefOperand")) + throw TGError(Loc, "reg0 used for result that is not an " + "OptionalDefOperand!"); + + ResOp = ResultOperand(static_cast<Record*>(0)); + return true; + } + + if (IntInit *II = dynamic_cast<IntInit*>(Arg)) { + if (hasSubOps || !InstOpRec->isSubClassOf("Operand")) + return false; + // Integer arguments can't have names. + if (!Result->getArgName(AliasOpNo).empty()) + throw TGError(Loc, "result argument #" + utostr(AliasOpNo) + + " must not have a name!"); + ResOp = ResultOperand(II->getValue()); + return true; + } + + return false; +} + +CodeGenInstAlias::CodeGenInstAlias(Record *R, CodeGenTarget &T) : TheDef(R) { + AsmString = R->getValueAsString("AsmString"); + Result = R->getValueAsDag("ResultInst"); + + // Verify that the root of the result is an instruction. + DefInit *DI = dynamic_cast<DefInit*>(Result->getOperator()); + if (DI == 0 || !DI->getDef()->isSubClassOf("Instruction")) + throw TGError(R->getLoc(), "result of inst alias should be an instruction"); + + ResultInst = &T.getInstruction(DI->getDef()); + + // NameClass - If argument names are repeated, we need to verify they have + // the same class. + StringMap<Record*> NameClass; + for (unsigned i = 0, e = Result->getNumArgs(); i != e; ++i) { + DefInit *ADI = dynamic_cast<DefInit*>(Result->getArg(i)); + if (!ADI || Result->getArgName(i).empty()) + continue; + // Verify we don't have something like: (someinst GR16:$foo, GR32:$foo) + // $foo can exist multiple times in the result list, but it must have the + // same type. + Record *&Entry = NameClass[Result->getArgName(i)]; + if (Entry && Entry != ADI->getDef()) + throw TGError(R->getLoc(), "result value $" + Result->getArgName(i) + + " is both " + Entry->getName() + " and " + + ADI->getDef()->getName() + "!"); + Entry = ADI->getDef(); + } + + // Decode and validate the arguments of the result. + unsigned AliasOpNo = 0; + for (unsigned i = 0, e = ResultInst->Operands.size(); i != e; ++i) { + + // Tied registers don't have an entry in the result dag. + if (ResultInst->Operands[i].getTiedRegister() != -1) + continue; + + if (AliasOpNo >= Result->getNumArgs()) + throw TGError(R->getLoc(), "not enough arguments for instruction!"); + + Record *InstOpRec = ResultInst->Operands[i].Rec; + unsigned NumSubOps = ResultInst->Operands[i].MINumOperands; + ResultOperand ResOp(static_cast<int64_t>(0)); + if (tryAliasOpMatch(Result, AliasOpNo, InstOpRec, (NumSubOps > 1), + R->getLoc(), T, ResOp)) { + ResultOperands.push_back(ResOp); + ResultInstOperandIndex.push_back(std::make_pair(i, -1)); + ++AliasOpNo; + continue; + } + + // If the argument did not match the instruction operand, and the operand + // is composed of multiple suboperands, try matching the suboperands. + if (NumSubOps > 1) { + DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo; + for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) { + if (AliasOpNo >= Result->getNumArgs()) + throw TGError(R->getLoc(), "not enough arguments for instruction!"); + Record *SubRec = dynamic_cast<DefInit*>(MIOI->getArg(SubOp))->getDef(); + if (tryAliasOpMatch(Result, AliasOpNo, SubRec, false, + R->getLoc(), T, ResOp)) { + ResultOperands.push_back(ResOp); + ResultInstOperandIndex.push_back(std::make_pair(i, SubOp)); + ++AliasOpNo; + } else { + throw TGError(R->getLoc(), "result argument #" + utostr(AliasOpNo) + + " does not match instruction operand class " + + (SubOp == 0 ? InstOpRec->getName() :SubRec->getName())); + } + } + continue; + } + throw TGError(R->getLoc(), "result argument #" + utostr(AliasOpNo) + + " does not match instruction operand class " + + InstOpRec->getName()); + } + + if (AliasOpNo != Result->getNumArgs()) + throw TGError(R->getLoc(), "too many operands for instruction!"); +} |
