Marcelina Kościelnicka 436d42c00c opt_expr: Propagate constants to port connections. ...

This adds one simple piece of functionality to opt_expr: when a cell
port is connected to a fully-constant signal (as determined by sigmap),
the port is reconnected directly to the constant value.  This is just
enough optimization to fix the "non-constant $meminit input" problem
without requiring a full opt_clean or a separate pass.

2021-07-27 20:44:26 +02:00

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