TMC-20500: Hierarchical Tree Duplication was Shallower than Possible


Hierarchical tree duplication can be limited by a variety of issues, usually related to issues with pipelining of registers upstream of the tail register that feeds the hierarchy tree.

For more on Hierarchical Duplication and the DUPLICATE_HIERARCHY_DEPTH assignment, refer to Hierarchical Proximity in the Register Duplication section of Intel Quartus Prime Pro Edition User Guide: Design Optimization .


Address the issue limiting the duplication, or increase the number of pipeline stages preceding the high fan-out tail.




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

Device Family

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