Yes, there is an issue when simulating the Altera_PLL megafunction when entering phase shift in degrees using the simulation models that are generated in the Quartus® II software version 12.0.
If you enter the phase shift in degrees, you will not see the correct phase shift in the ModelSim-Altera simuation result.
Phase shift entry in degrees is first supported in the Altera_PLL megafunction in the Quartus II software version 12.0.
In order to obtain the correct phase shift, you need to need to enter the phase shift a in time interval period. Or you could change the coding in the megawizard .v file as shown below:
<instance name>.phase_shift0 = <time unit>,
<instance name>.phase_shift0 = <"time unit ps">,
This issue will be fixed in a future version of the Quartus II software.