Moved parse_lookahead_data.py

Author: Nathan Shreve

vpr/src/route/lookahead_profiler.cpp

@@ -66,10 +66,9 @@ void LookaheadProfiler::record(int iteration,
     if (iteration < 1)
         return;
 
-    RRNodeId source_inode = branch_inodes.back();
+    RRNodeId source_inode = branch_inodes.back(); // Not necessarily an actual SOURCE node.
     RRNodeId sink_inode = branch_inodes.front();
 
-    VTR_ASSERT(rr_graph.node_type(source_inode) == SOURCE);
     VTR_ASSERT(rr_graph.node_type(sink_inode) == SINK);
 
     /* Get sink node attributes (atom block name, atom block model, cluster type, tile dimensions) */

vpr/src/route/lookahead_profiler.h

@@ -27,10 +27,10 @@ class LookaheadProfiler {
      * @param router_lookahead
      * @param net_id
      * @param net_list
-     * @param branch_inodes A path from a sink to its source, as a vector of nodes.
+     * @param branch_inodes A backwards path of nodes, starting at a sink.
      *
      * @warning
-     * branch_inodes must be a backwards path, from a sink node to a source node.
+     * branch_inodes must be a backwards path, starting at a sink node.
      */
     void record(int iteration,
                 int target_net_pin_index,