[vpr][route][switch] remove rr_ipin switch from alloc_and_load_rr_switch_inf

Author: amin1377

vpr/src/route/rr_graph_generation/rr_graph_switch_utils.cpp

@@ -172,9 +172,7 @@ void alloc_and_load_rr_switch_inf(RRGraphBuilder& rr_graph_builder,
                                   t_arch_switch_fanin& switch_fanin_remap,
                                   const std::map<int, t_arch_switch_inf>& arch_sw_inf,
                                   const float R_minW_nmos,
-                                  const float R_minW_pmos,
-                                  const int wire_to_arch_ipin_switch,
-                                  RRSwitchId& wire_to_rr_ipin_switch) {
+                                  const float R_minW_pmos) {
     // we will potentially be creating a couple of versions of each arch switch where
     // each version corresponds to a different fan-in. We will need to fill device_ctx.rr_switch_inf
     // with this expanded list of switches.
@@ -200,23 +198,4 @@ void alloc_and_load_rr_switch_inf(RRGraphBuilder& rr_graph_builder,
 
     // next, walk through rr nodes again and remap their switch indices to rr_switch_inf
     rr_graph_builder.remap_rr_node_switch_indices(arch_switch_fanins);
-
-    // now we need to set the wire_to_rr_ipin_switch variable which points the detailed routing architecture
-    // to the representative ipin cblock switch. currently we're not allowing the specification of an ipin cblock switch
-    // with multiple fan-ins, so right now there's just one. May change in the future, in which case we'd need to
-    // return a representative switch
-    if (arch_switch_fanins[wire_to_arch_ipin_switch].count(UNDEFINED)) {
-        // only have one ipin cblock switch. OK.
-        wire_to_rr_ipin_switch = arch_switch_fanins[wire_to_arch_ipin_switch][UNDEFINED];
-    } else if (arch_switch_fanins[wire_to_arch_ipin_switch].size() != 0) {
-        VPR_FATAL_ERROR(VPR_ERROR_ARCH,
-                        "Not currently allowing an ipin cblock switch to have multiple fan-ins");
-    } else {
-        // This likely indicates that no connection block has been constructed, indicating significant issues with
-        // the generated RR graph.
-        // Instead of throwing an error we issue a warning. This means that check_rr_graph() etc. will run to give more information
-        // and allow graphics to be brought up for users to debug their architectures.
-        wire_to_rr_ipin_switch = RRSwitchId::INVALID();
-        VTR_LOG_WARN("No switch found for the ipin cblock in RR graph. Check if there is an error in arch file, or if no connection blocks are being built in RR graph\n");
-    }
 }

vpr/src/route/rr_graph_generation/rr_graph_switch_utils.h

@@ -67,12 +67,9 @@ t_rr_switch_inf create_rr_switch_from_arch_switch(const t_arch_switch_inf& arch_
  * @param R_minW_nmos               Reference R for a minimum-width nMOS (for AUTO buf sizing).
  * @param R_minW_pmos               Reference R for a minimum-width pMOS (for AUTO buf sizing).
  * @param wire_to_arch_ipin_switch  Architecture index of the IPIN connection-block switch.
- * @param wire_to_rr_ipin_switch    Output: rr_switch index of the representative IPIN cblock switch.
  */
 void alloc_and_load_rr_switch_inf(RRGraphBuilder& rr_graph_builder,
                                   t_arch_switch_fanin& switch_fanin_remap,
                                   const std::map<int, t_arch_switch_inf>& arch_sw_inf,
                                   const float R_minW_nmos,
-                                  const float R_minW_pmos,
-                                  const int wire_to_arch_ipin_switch,
-                                  RRSwitchId& wire_to_rr_ipin_switch);
+                                  const float R_minW_pmos);