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Hey. What is the meaning and effect of design flattening? When I'm enabling `SYNTH_NO_FLAT` it shows...
# openlane
h
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.
@Vijayan Krishnan @Mitch Bailey
m
Sorry, I don’t know.
v
A flag that disables flattening the hierarchy during synthesis, only flattening it after synthesis, mapping and optimizations. Enabled = 1, Disabled = 0 (Default: 
0
)
h
@Vijayan Krishnan Why there's a big change in no. of standard cells from 585 to 305463 when I set 
SYNTH_NO_FLAT {1}
v
https://github.com/The-OpenROAD-Project/OpenLane/discussions post your discussion here. Flow developers may answer or else open issue with test case
h
Okay thanks
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