[turbofan] Ensure that NTLs are always properly connected to the end.

src/compiler/scheduler.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <deque>
 #include <queue>
 
 #include "src/compiler/scheduler.h"
 
 #include "src/bit-vector.h"
@@ skipping 298 matching lines @@
       case IrOpcode::kEnd:
         FixNode(schedule_->end(), node);
         break;
       case IrOpcode::kStart:
         FixNode(schedule_->start(), node);
         break;
       case IrOpcode::kLoop:
       case IrOpcode::kMerge:
         BuildBlockForNode(node);
         break;
-      case IrOpcode::kTerminate: {
-        // Put Terminate in the loop to which it refers.
-        Node* loop = NodeProperties::GetControlInput(node);
-        BasicBlock* block = BuildBlockForNode(loop);
-        FixNode(block, node);
-        break;
-      }
       case IrOpcode::kBranch:
         BuildBlocksForSuccessors(node, IrOpcode::kIfTrue, IrOpcode::kIfFalse);
         break;
       default:
         break;
     }
   }
 
   void ConnectBlocks(Node* node) {
     switch (node->opcode()) {
@@ skipping 1121 matching lines @@
   for (Node* const node : *nodes) {
     schedule_->SetBlockForNode(to, node);
     scheduled_nodes_[to->id().ToSize()].push_back(node);
   }
   nodes->clear();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8