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decode and validate instruction alias result definitions. 

llvm-svn: 118327
This commit is contained in:
Chris Lattner 2010-11-06 06:54:38 +00:00
parent 23064cb4e5
commit 7603052d49
1 changed files with 33 additions and 0 deletions
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33
llvm/utils/TableGen/CodeGenInstruction.cpp
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@ -400,4 +400,37 @@ CodeGenInstAlias::CodeGenInstAlias(Record *R, CodeGenTarget &T)
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.
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()));
continue;
}
throw TGError(R->getLoc(), "result of inst alias has unknown operand type");
}
}