// Only do this before legalize for now.
if (VT.isVector() && !LegalOperations) {
EVT N0VT = N0.getOperand(0).getValueType();
- // We know that the # elements of the results is the same as the
- // # elements of the compare (and the # elements of the compare result
- // for that matter). Check to see that they are the same size. If so,
- // we know that the element size of the sext'd result matches the
- // element size of the compare operands.
- if (VT.getSizeInBits() == N0VT.getSizeInBits())
+ // On some architectures (such as SSE/NEON/etc) the SETCC result type is
+ // of the same size as the compared operands. Only optimize sext(setcc())
+ // if this is the case.
+ EVT SVT = TLI.getSetCCResultType(N0VT);
+
+ // We know that the # elements of the results is the same as the
+ // # elements of the compare (and the # elements of the compare result
+ // for that matter). Check to see that they are the same size. If so,
+ // we know that the element size of the sext'd result matches the
+ // element size of the compare operands.
+ if (VT.getSizeInBits() == SVT.getSizeInBits())
return DAG.getSetCC(N->getDebugLoc(), VT, N0.getOperand(0),
N0.getOperand(1),
cast<CondCodeSDNode>(N0.getOperand(2))->get());
EVT MatchingVectorType =
EVT::getVectorVT(*DAG.getContext(), MatchingElementType,
N0VT.getVectorNumElements());
- SDValue VsetCC =
- DAG.getSetCC(N->getDebugLoc(), MatchingVectorType, N0.getOperand(0),
- N0.getOperand(1),
- cast<CondCodeSDNode>(N0.getOperand(2))->get());
- return DAG.getSExtOrTrunc(VsetCC, N->getDebugLoc(), VT);
+
+ if (SVT == MatchingVectorType) {
+ SDValue VsetCC = DAG.getSetCC(N->getDebugLoc(), MatchingVectorType,
+ N0.getOperand(0), N0.getOperand(1),
+ cast<CondCodeSDNode>(N0.getOperand(2))->get());
+ return DAG.getSExtOrTrunc(VsetCC, N->getDebugLoc(), VT);
+ }
}
}