BUFCE_LEAF is a clock buffer with CE for leaf driving off horizontal HCS row. This buffer is an interconnect leaf clock buffer driving the clocking point of the various blocks with a single gated input. Its O output is 0 when CE is Low (inactive). When CE is High, the I input is transferred to the O output. Table: BUFCE_LEAF Attributes shows the BUFCE_LEAF attributes.
The BUFGCE_LEAF is documented for information purpose only and is not user accessible in Vivado design suite (e.g., for instantiation, placement, etc.).