#include "CodeGenInstruction.h"
#include "CodeGenTarget.h"
-#include "Record.h"
+#include "llvm/TableGen/Error.h"
+#include "llvm/TableGen/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) : TheDef(R) {
- Namespace = R->getValueAsString("Namespace");
- AsmString = R->getValueAsString("AsmString");
+//===----------------------------------------------------------------------===//
+// 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");
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){
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;
+ std::string OperandType = "OPERAND_UNKNOWN";
unsigned NumOps = 1;
DagInit *MIOpInfo = 0;
- if (Rec->isSubClassOf("Operand")) {
+ if (Rec->isSubClassOf("RegisterOperand")) {
PrintMethod = Rec->getValueAsString("PrintMethod");
+ } else if (Rec->isSubClassOf("Operand")) {
+ PrintMethod = Rec->getValueAsString("PrintMethod");
+ OperandType = Rec->getValueAsString("OperandType");
// If there is an explicit encoder method, use it.
- if (Rec->getValue("EncoderMethod"))
- EncoderMethod = Rec->getValueAsString("EncoderMethod");
+ 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.
} else if (Rec->getName() == "variable_ops") {
isVariadic = true;
continue;
- } else if (!Rec->isSubClassOf("RegisterClass") &&
- Rec->getName() != "ptr_rc" && Rec->getName() != "unknown")
+ } else if (Rec->isSubClassOf("RegisterClass")) {
+ OperandType = "OPERAND_REGISTER";
+ } else if (!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, EncoderMethod,
- MIOperandNo, NumOps, MIOpInfo));
+ OperandType, 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(StringRef Name) const {
+unsigned CGIOperandList::getOperandNamed(StringRef Name) const {
unsigned OpIdx;
if (hasOperandNamed(Name, OpIdx)) return OpIdx;
- throw "Instruction '" + TheDef->getName() +
- "' does not have an operand named '$" + Name.str() + "'!";
+ throw "'" + TheDef->getName() + "' does not have an operand named '$" +
+ Name.str() + "'!";
}
/// hasOperandNamed - Query whether the instruction has an operand of the
/// given name. If so, return true and set OpIdx to the index of the
/// operand. Otherwise, return false.
-bool CodeGenInstruction::hasOperandNamed(StringRef Name,
- unsigned &OpIdx) const {
+bool CGIOperandList::hasOperandNamed(StringRef Name, unsigned &OpIdx) const {
assert(!Name.empty() && "Cannot search for operand with no name!");
for (unsigned i = 0, e = OperandList.size(); i != e; ++i)
if (OperandList[i].Name == Name) {
}
std::pair<unsigned,unsigned>
-CodeGenInstruction::ParseOperandName(const std::string &Op,
- bool AllowWholeOp) {
+CGIOperandList::ParseOperandName(const std::string &Op, bool AllowWholeOp) {
if (Op.empty() || Op[0] != '$')
throw TheDef->getName() + ": Illegal operand name: '" + Op + "'";
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);
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::pair<StringRef, StringRef> P = getToken(DisableEncoding, " ,\t");
+ std::string OpName = P.first;
+ DisableEncoding = P.second;
+ 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");
+ isBitcast = R->getValueAsBit("isBitcast");
+ isSelect = R->getValueAsBit("isSelect");
+ 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");
+ hasPostISelHook = R->getValueAsBit("hasPostISelHook");
+ 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");
+ isCodeGenOnly = R->getValueAsBit("isCodeGenOnly");
+ isPseudo = R->getValueAsBit("isPseudo");
+ 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
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];
std::string CodeGenInstruction::
FlattenAsmStringVariants(StringRef Cur, unsigned Variant) {
std::string Res = "";
-
+
for (;;) {
// Find the start of the next variant string.
size_t VariantsStart = 0;
(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;
} 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;
+ }
+
+ // For register operands, the source register class can be a subclass
+ // of the instruction register class, not just an exact match.
+ if (ADI && ADI->getDef()->isSubClassOf("RegisterClass")) {
+ if (!InstOpRec->isSubClassOf("RegisterClass"))
+ return false;
+ if (!T.getRegisterClass(InstOpRec)
+ .hasSubClass(&T.getRegisterClass(ADI->getDef())))
+ return false;
+ ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef());
+ return true;
+ }
+
+ // Handle explicit registers.
+ if (ADI && ADI->getDef()->isSubClassOf("Register")) {
+ if (InstOpRec->isSubClassOf("OptionalDefOperand")) {
+ DagInit *DI = InstOpRec->getValueAsDag("MIOperandInfo");
+ // The operand info should only have a single (register) entry. We
+ // want the register class of it.
+ InstOpRec = dynamic_cast<DefInit*>(DI->getArg(0))->getDef();
+ }
+
+ if (InstOpRec->isSubClassOf("RegisterOperand"))
+ InstOpRec = InstOpRec->getValueAsDef("RegClass");
+
+ if (!InstOpRec->isSubClassOf("RegisterClass"))
+ return false;
+
+ if (!T.getRegisterClass(InstOpRec)
+ .contains(T.getRegBank().getReg(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.
+ // Tied operands where the source is a sub-operand of a complex operand
+ // need to represent both operands in the alias destination instruction.
+ // Allow zero_reg for the tied portion. This can and should go away once
+ // the MC representation of things doesn't use tied operands at all.
+ //if (!InstOpRec->isSubClassOf("OptionalDefOperand"))
+ // throw TGError(Loc, "reg0 used for result that is not an "
+ // "OptionalDefOperand!");
+
+ ResOp = ResultOperand(static_cast<Record*>(0));
+ return true;
+ }
+
+ // Literal integers.
+ 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;
+ }
+
+ // If both are Operands with the same MVT, allow the conversion. It's
+ // up to the user to make sure the values are appropriate, just like
+ // for isel Pat's.
+ if (InstOpRec->isSubClassOf("Operand") &&
+ ADI->getDef()->isSubClassOf("Operand")) {
+ // FIXME: What other attributes should we check here? Identical
+ // MIOperandInfo perhaps?
+ if (InstOpRec->getValueInit("Type") != ADI->getDef()->getValueInit("Type"))
+ return false;
+ ResOp = ResultOperand(Result->getArgName(AliasOpNo), ADI->getDef());
+ 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 unless they're part
+ // of a complex operand, in which case we include them anyways, as we
+ // don't have any other way to specify the whole operand.
+ if (ResultInst->Operands[i].MINumOperands == 1 &&
+ 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)) {
+ // If this is a simple operand, or a complex operand with a custom match
+ // class, then we can match is verbatim.
+ if (NumSubOps == 1 ||
+ (InstOpRec->getValue("ParserMatchClass") &&
+ InstOpRec->getValueAsDef("ParserMatchClass")
+ ->getValueAsString("Name") != "Imm")) {
+ ResultOperands.push_back(ResOp);
+ ResultInstOperandIndex.push_back(std::make_pair(i, -1));
+ ++AliasOpNo;
+
+ // Otherwise, we need to match each of the suboperands individually.
+ } else {
+ DagInit *MIOI = ResultInst->Operands[i].MIOperandInfo;
+ for (unsigned SubOp = 0; SubOp != NumSubOps; ++SubOp) {
+ Record *SubRec = dynamic_cast<DefInit*>(MIOI->getArg(SubOp))->getDef();
+
+ // Take care to instantiate each of the suboperands with the correct
+ // nomenclature: $foo.bar
+ ResultOperands.push_back(
+ ResultOperand(Result->getArgName(AliasOpNo) + "." +
+ MIOI->getArgName(SubOp), SubRec));
+ ResultInstOperandIndex.push_back(std::make_pair(i, SubOp));
+ }
+ ++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!");
+}
projects / oota-llvm.git / blobdiff