dont_optimize

Removes buffers or inverters from the netlist.

dont_optimize [{ option }];

Arguments

[{ option }]

Specifies the netlist optimization option to turn off and preserve.

Option	Description
buffer	Removes all buffers in the design, provided you have not exceeded the maximum fan-out
inverter	Removes all inverters in the design, provided you have not exceeded the maximum fan-out
const	Replaces all logical elements with one or more inputs connected to a constant (logical “1” or “0”) by the appropriate logic function. If the replacement logic function is identified as an inverter or buffer, that element is removed.
dangling	Recursively removes all cells driving unconnected nets

Supported Families

ProASIC PLUS and ProASIC

Description

This statement does not optimize your buffers or inverters; instead, it removes them. When followed by one or more of the netlist optimization options, this statement turns off the named option (and preserves it).

If you have buffers or inverters that are connected to global nets, promoted global nets, or spine nets, this command is ignored and buffers and inverters are still removed. To avoid removing them, use the dont_touch option.

Exceptions

None

Examples