+ // If Operand N already has a matching input, reject this. An output
+ // can't be constrained to the same value as multiple inputs.
+ if (isMultipleAlternative) {
+ InlineAsm::SubConstraintInfo &scInfo =
+ ConstraintsSoFar[N].multipleAlternatives[multipleAlternativeIndex];
+ if (scInfo.MatchingInput != -1)
+ return true;
+ // Note that operand #n has a matching input.
+ scInfo.MatchingInput = ConstraintsSoFar.size();
+ } else {
+ if (ConstraintsSoFar[N].hasMatchingInput())
+ return true;
+ // Note that operand #n has a matching input.
+ ConstraintsSoFar[N].MatchingInput = ConstraintsSoFar.size();
+ }
+ } else if (*I == '|') {
+ multipleAlternativeIndex++;
+ pCodes = &multipleAlternatives[multipleAlternativeIndex].Codes;
+ ++I;
+ } else if (*I == '^') {
+ // Multi-letter constraint
+ // FIXME: For now assuming these are 2-character constraints.
+ pCodes->push_back(std::string(I+1, I+3));
+ I += 3;