[Hexagon] Use getSigned() for signed value

Author: nikic

llvm/lib/Target/Hexagon/HexagonISelLowering.cpp

@@ -2527,7 +2527,7 @@ HexagonTargetLowering::getBuildVectorConstInts(ArrayRef<SDValue> Values,
     // Make sure to always cast to IntTy.
     if (auto *CN = dyn_cast<ConstantSDNode>(V.getNode())) {
       const ConstantInt *CI = CN->getConstantIntValue();
-      Consts[i] = ConstantInt::get(IntTy, CI->getValue().getSExtValue());
+      Consts[i] = ConstantInt::getSigned(IntTy, CI->getValue().getSExtValue());
     } else if (auto *CN = dyn_cast<ConstantFPSDNode>(V.getNode())) {
       const ConstantFP *CF = CN->getConstantFPValue();
       APInt A = CF->getValueAPF().bitcastToAPInt();