The FIR Compiler v11.0 provides final support for Arria II GZ and Cyclone IV GX devices. However, when your FIR Compiler targets an Arria II GZ device or a Cyclone IV GX device, a warning message indicates support is only preliminary. This warning message is erroneous.
All FIR Compiler variations that target an Arria II GZ device or a Cyclone IV GX device.
This issue has no workaround.