TMC-20551: Automatically Selected Duplication Candidate Likely Requires More Duplication


The Compiler conservatively duplicates candidate registers that it detects automatically. If the average per-duplicate, fan-out is still large after this duplication, apply more duplication manually.


Name Description Type Default Value Min Value Max Value
avg_dup_fanout Reports a violation for duplication candidates that have an Average Duplicate Fan-Out exceeding a certain threshold. integer 1000    


Duplicate registers by applying the DUPLICATE_REGISTER or DUPLICATE_HIERARCHY_DEPTH assignments, or edit the RTL to create duplicate copies. If you edit the RTL, apply the preserve_syn_only attribute to the duplicate registers, and assign the duplicates to individual instances in the fan-out hierarchy.




Tag Description
register-duplication Design rule checks related to duplication of registers in the design, either manually or automatically.
place Design rule checks which pertain to the Compiler's Place stage.

Device Family

  • Intel®Stratix® 10
  • Intel Agilex®
  • Intel Agilex®
  • Intel Agilex®
  • Intel®Arria® 10