Avoid criticality issue.

Signed-off-by: Keith Rothman <[email protected]>
Signed-off-by: Alessandro Comodi <[email protected]>

Author: litghost

vpr/src/timing/timing_util.cpp

@@ -571,6 +571,10 @@ float calc_relaxed_criticality(const std::map<DomainPair, float>& domains_max_re
             max_req += shift;
         }
 
+        if (!std::isfinite(slack)) {
+            continue;
+        }
+
         float crit = std::numeric_limits<float>::quiet_NaN();
         if (max_req > 0.) {
             //Standard case