#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;
isPredicable = false;
hasOptionalDef = false;
isVariadic = false;
-
+
DagInit *OutDI = R->getValueAsDag("OutOperandList");
-
+
if (DefInit *Init = dynamic_cast<DefInit*>(OutDI->getOperator())) {
if (Init->getDef()->getName() != "outs")
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");
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;
if (Rec->isSubClassOf("Operand")) {
PrintMethod = Rec->getValueAsString("PrintMethod");
// 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")
throw "Bad value for MIOperandInfo in operand '" + Rec->getName() +
"'\n";
-
+
// If we have MIOpInfo, then we have #operands equal to number of entries
// in MIOperandInfo.
if (unsigned NumArgs = MIOpInfo->getNumArgs())
NumOps = NumArgs;
-
+
if (Rec->isSubClassOf("PredicateOperand"))
isPredicable = true;
else if (Rec->isSubClassOf("OptionalDefOperand"))
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!";
-
+
// Check that the operand has a name and that it's unique.
if (ArgName.empty())
throw "In instruction '" + R->getName() + "', operand #" + utostr(i) +
if (!OperandNames.insert(ArgName).second)
throw "In instruction '" + R->getName() + "', operand #" + utostr(i) +
" has the same name as a previous operand!";
-
+
OperandList.push_back(OperandInfo(Rec, ArgName, PrintMethod, EncoderMethod,
MIOperandNo, NumOps, MIOpInfo));
MIOperandNo += NumOps;
}
-
-
+
+
// 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)
unsigned CGIOperandList::getOperandNamed(StringRef Name) const {
unsigned OpIdx;
if (hasOperandNamed(Name, OpIdx)) return OpIdx;
- throw "'" + TheDef->getName() + "' does not have an operand named '$" +
+ throw "'" + TheDef->getName() + "' does not have an operand named '$" +
Name.str() + "'!";
}
CGIOperandList::ParseOperandName(const std::string &Op, bool AllowWholeOp) {
if (Op.empty() || Op[0] != '$')
throw TheDef->getName() + ": Illegal operand name: '" + Op + "'";
-
+
std::string OpName = Op.substr(1);
std::string SubOpName;
-
+
// Check to see if this is $foo.bar.
std::string::size_type DotIdx = OpName.find_first_of(".");
if (DotIdx != std::string::npos) {
throw TheDef->getName() + ": illegal empty suboperand name in '" +Op +"'";
OpName = OpName.substr(0, DotIdx);
}
-
+
unsigned OpIdx = getOperandNamed(OpName);
-
+
if (SubOpName.empty()) { // If no suboperand name was specified:
// If one was needed, throw.
if (OperandList[OpIdx].MINumOperands > 1 && !AllowWholeOp &&
SubOpName.empty())
throw TheDef->getName() + ": Illegal to refer to"
" whole operand part of complex operand '" + Op + "'";
-
+
// Otherwise, return the operand.
return std::make_pair(OpIdx, 0U);
}
-
+
// Find the suboperand number involved.
DagInit *MIOpInfo = OperandList[OpIdx].MIOperandInfo;
if (MIOpInfo == 0)
throw TheDef->getName() + ": unknown suboperand name in '" + Op + "'";
-
+
// Find the operand with the right name.
for (unsigned i = 0, e = MIOpInfo->getNumArgs(); i != e; ++i)
if (MIOpInfo->getArgName(i) == SubOpName)
return std::make_pair(OpIdx, i);
-
+
// Otherwise, didn't find it!
throw TheDef->getName() + ": unknown suboperand name in '" + Op + "'";
}
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!";
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] =
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);
}
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;
}
-
+
}
//===----------------------------------------------------------------------===//
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");
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
//===----------------------------------------------------------------------===//
-CodeGenInstAlias::CodeGenInstAlias(Record *R, CodeGenTarget &T)
- : TheDef(R), Operands(R) {
- AsmString = R->getValueAsString("AsmString");
+/// 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.
throw TGError(R->getLoc(), "result of inst alias should be an instruction");
ResultInst = &T.getInstruction(DI->getDef());
-
- // Check number of arguments in the result.
- if (ResultInst->Operands.size() != Result->getNumArgs())
- throw TGError(R->getLoc(), "result has " + utostr(Result->getNumArgs()) +
- " arguments, but " + ResultInst->TheDef->getName() +
- " instruction expects " + utostr(ResultInst->Operands.size())+
- " operands!");
-
- // Decode and validate the arguments of the result.
+
+ // 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) {
- Init *Arg = Result->getArg(i);
-
- // 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 (DefInit *ADI = dynamic_cast<DefInit*>(Arg)) {
- if (Result->getArgName(i).empty())
- throw TGError(R->getLoc(), "result argument #" + utostr(i) +
- " must have a name!");
-
- if (ADI->getDef() != ResultInst->Operands[i].Rec)
- throw TGError(R->getLoc(), "result argument #" + utostr(i) +
- " declared with class " + ADI->getDef()->getName() +
- ", instruction operand is class " +
- ResultInst->Operands[i].Rec->getName());
-
- // Now that it is validated, add it.
- ResultOperands.push_back(ResultOperand(Result->getArgName(i),
- ADI->getDef()));
+ 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;
}
- throw TGError(R->getLoc(), "result of inst alias has unknown operand type");
+ // 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!");
}
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