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Extend UNUSED to flag signals which are not in the cone of a module output #1395
Author Name: Geoff Barrett
The following code produces no warnings:
The combination of UNUSED and UNOPTFLAT means (I think) that we will always get a warning if signals are not either in the cone of an output or a nonblocking assignment. However, d and q are only used by each other and can be eliminated from the module and it would be very useful to get a warning about this.