Does repair_timing potentially create illegal placement (overlaps)?

[RayChang987]

I am experimenting with repair_timing (both -setup and -hold) on placed designs. I observed that after running repair_timing, the design may become placement-illegal, even when using options like -match_cell_footprint.

Is there any option setting in repair_timing that ensures the design remains placement-legal (no overlaps, site aligned) after execution?

repair_timing -hold
# or -setup

check_placement  # Overlap check failed (188),  Site aligned check failed (87).

[maliberty]

Repair timing just gives an approximate location and you need to run detailed_placement to legalize it. It is expected.