bool TGParser::AddValue(Record *CurRec, TGLoc Loc, const RecordVal &RV) {
if (CurRec == 0)
CurRec = &CurMultiClass->Rec;
if (RecordVal *ERV = CurRec->getValue(RV.getName())) {
// The value already exists in the class, treat this as a set.
if (ERV->setValue(RV.getValue()))
return Error(Loc, "New definition of '" + RV.getName() + "' of type '" +
RV.getType()->getAsString() + "' is incompatible with " +
"previous definition of type '" +
ERV->getType()->getAsString() + "'");
} else {
CurRec->addValue(RV);
}
return false;
}
/// SetValue -
/// Return true on error, false on success.
bool TGParser::SetValue(Record *CurRec, TGLoc Loc, const std::string &ValName,
const std::vector<unsigned> &BitList, Init *V) {
if (!V) return false;
if (CurRec == 0) CurRec = &CurMultiClass->Rec;
RecordVal *RV = CurRec->getValue(ValName);
if (RV == 0)
return Error(Loc, "Value '" + ValName + "' unknown!");
// Do not allow assignments like 'X = X'. This will just cause infinite loops
// in the resolution machinery.
if (BitList.empty())
if (VarInit *VI = dynamic_cast<VarInit*>(V))
if (VI->getName() == ValName)
return false;
// If we are assigning to a subset of the bits in the value... then we must be
// assigning to a field of BitsRecTy, which must have a BitsInit
// initializer.
//
if (!BitList.empty()) {
BitsInit *CurVal = dynamic_cast<BitsInit*>(RV->getValue());
if (CurVal == 0)
return Error(Loc, "Value '" + ValName + "' is not a bits type");
// Convert the incoming value to a bits type of the appropriate size...
Init *BI = V->convertInitializerTo(new BitsRecTy(BitList.size()));
if (BI == 0) {
V->convertInitializerTo(new BitsRecTy(BitList.size()));
return Error(Loc, "Initializer is not compatible with bit range");
}
// We should have a BitsInit type now.
BitsInit *BInit = dynamic_cast<BitsInit*>(BI);
assert(BInit != 0);
BitsInit *NewVal = new BitsInit(CurVal->getNumBits());
// Loop over bits, assigning values as appropriate.
for (unsigned i = 0, e = BitList.size(); i != e; ++i) {
unsigned Bit = BitList[i];
if (NewVal->getBit(Bit))
return Error(Loc, "Cannot set bit #" + utostr(Bit) + " of value '" +
ValName + "' more than once");
NewVal->setBit(Bit, BInit->getBit(i));
}
for (unsigned i = 0, e = CurVal->getNumBits(); i != e; ++i)
if (NewVal->getBit(i) == 0)
NewVal->setBit(i, CurVal->getBit(i));
V = NewVal;
}
if (RV->setValue(V))
return Error(Loc, "Value '" + ValName + "' of type '" +
RV->getType()->getAsString() +
"' is incompatible with initializer '" + V->getAsString() +"'");
return false;
}
