Due to a problem in the Intel® Quartus® Prime Pro Edition software version 19.1, you may see functional failures for OpenCL™ compiles using the -fast-compile flag. This problem occurs on designs targeting Intel® Stratix® 10 devices. The failures happen because of hold violations in the design.
To work around this problem, do not use the -fast-compile aoc flag when targeting Intel® Stratix® 10 devices with the OpenCL™ flow.
This problem is scheduled to be fixed in a future release of the Intel® Quartus® Prime Pro Edition software.