Hey. What is the meaning and effect of design flattening? When I'm enabling

SYNTH_NO_FLAT

it shows a drastic change in no. of cells and area after synthesis.

Sorry, I don’t know.

A flag that disables flattening the hierarchy during synthesis, only flattening it after synthesis, mapping and optimizations. Enabled = 1, Disabled = 0 (Default:

0

)

@Vijayan Krishnan Why there's a big change in no. of standard cells from 585 to 305463 when I set

SYNTH_NO_FLAT {1}

https://github.com/The-OpenROAD-Project/OpenLane/discussions post your discussion here. Flow developers may answer or else open issue with test case

Okay thanks