Description
Warning: [200-893] Latency directive discarded
for region %s since region contains function calls with variable latency.
This message reports that the parent function contains sub-functions of different latencies.
Explanation
The code is violating latency optimization rules. The parent function contains sub-functions of different latencies which will be added to the total parent latency as shown in the below code.
func1(...)
{
// latency of func1 = ~(func2+fun3) + ~(func1) = ~75
func2(..) # latency of this sub-func - 30
func3(...) # latency of this sub-func - 40
}Solution
Consider taking into account the latency of the sub-function when applying the latency pragma.