To better analyze optimization results, use the
-debug_log option to
see additional details of the logic affected by
optimization. The log displays additional messages of logic that is reduced due to
constant values and loadless logic that is subject to removal.
The log also displays detailed messages about optimizations that are prevented due to
constraints. Use the -verbose option to see full details of all logic optimization
-verbose option is
off by default due to the potential for a large volume of additional messages. Use
-verbose option if you believe it might be helpful.
Recommended: To improve tool run time for large designs, use the
-verboseoption only in shell or batch mode and not in the GUI mode.
opt_designcommand operates on the in-memory design. If run multiple times, the subsequent run optimizes the results of the previous run. Therefore you must reload the synthesized design before adding either the