vpr: Add an echo file for failed intra lb routing trace

Author: MohamedEldafrawy

vpr/src/base/echo_files.cpp

@@ -72,6 +72,9 @@ void alloc_and_load_echo_file_info() {
     setEchoFileName(E_ECHO_ATOM_NETLIST_ORIG, "atom_netlist.orig.echo.blif");
     setEchoFileName(E_ECHO_ATOM_NETLIST_CLEANED, "atom_netlist.cleaned.echo.blif");
 
+    //Intra-block routing
+    setEchoFileName(E_ECHO_INTRA_LB_FAILED_ROUTE, "intra_lb_failed_route.echo");
+
     //Timing Graphs
     setEchoFileName(E_ECHO_PRE_PACKING_TIMING_GRAPH, "timing_graph.pre_pack.echo");
     setEchoFileName(E_ECHO_INITIAL_PLACEMENT_TIMING_GRAPH, "timing_graph.place_initial.echo");

vpr/src/base/echo_files.h

@@ -11,6 +11,9 @@ enum e_echo_files {
     E_ECHO_PRE_PACKING_CRITICALITY,
     E_ECHO_PRE_PACKING_MOLECULES_AND_PATTERNS,
 
+    // Intra-block routing
+    E_ECHO_INTRA_LB_FAILED_ROUTE,
+
     //Placement
     E_ECHO_INITIAL_CLB_PLACEMENT,
     E_ECHO_PLACE_MACROS,

vpr/src/pack/cluster_router.cpp

@@ -25,6 +25,7 @@ using namespace std;
 
 #include "vpr_error.h"
 #include "vpr_types.h"
+#include "echo_files.h"
 
 #include "physical_types.h"
 #include "globals.h"
@@ -509,7 +510,7 @@ bool try_intra_lb_route(t_lb_router_data* router_data,
     } else {
         //Unroutable
 #ifdef PRINT_INTRA_LB_ROUTE
-        print_route("intra_lb_failed_route.echo", router_data);
+        print_route(getEchoFileName(E_ECHO_INTRA_LB_FAILED_ROUTE), router_data);
 #endif
 
         if (verbosity > 3 && !is_impossible) {