Verilog: remove constant folding during downwards type propagation #1293
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This cleans up verilog_typecheck_exprt::downwards_type_progatation to handle all the cases in 1800-2017 11.8.2.
This removes the constant folding during towards type propagation in the Verilog frontend, as this is premature optimisation.
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This removes the constant folding during towards type propagation in the Verilog frontend, as this is premature optimisation.