[turbofan] Added the RoundInt64ToFloat64 instruction to TurboFan.

src/compiler/instruction-selector.cc

 // Copyright 2014 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 "src/compiler/instruction-selector.h"
 
 #include <limits>
 
 #include "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
@@ skipping 674 matching lines @@
     case IrOpcode::kUint64LessThan:
       return VisitUint64LessThan(node);
     case IrOpcode::kUint64LessThanOrEqual:
       return VisitUint64LessThanOrEqual(node);
     case IrOpcode::kUint64Mod:
       return MarkAsWord64(node), VisitUint64Mod(node);
     case IrOpcode::kChangeFloat32ToFloat64:
       return MarkAsFloat64(node), VisitChangeFloat32ToFloat64(node);
     case IrOpcode::kChangeInt32ToFloat64:
       return MarkAsFloat64(node), VisitChangeInt32ToFloat64(node);
+    case IrOpcode::kChangeInt64ToFloat64:
+      return MarkAsFloat64(node), VisitChangeInt64ToFloat64(node);
     case IrOpcode::kChangeUint32ToFloat64:
       return MarkAsFloat64(node), VisitChangeUint32ToFloat64(node);
     case IrOpcode::kChangeFloat64ToInt32:
       return MarkAsWord32(node), VisitChangeFloat64ToInt32(node);
     case IrOpcode::kChangeFloat64ToUint32:
       return MarkAsWord32(node), VisitChangeFloat64ToUint32(node);
     case IrOpcode::kChangeInt32ToInt64:
       return MarkAsWord64(node), VisitChangeInt32ToInt64(node);
     case IrOpcode::kChangeUint32ToUint64:
       return MarkAsWord64(node), VisitChangeUint32ToUint64(node);
@@ skipping 587 matching lines @@
   for (StateValuesAccess::TypedNode input_node : StateValuesAccess(stack)) {
     inputs->push_back(OperandForDeopt(&g, input_node.node, kind));
     descriptor->SetType(value_index++, input_node.type);
   }
   DCHECK(value_index == descriptor->GetSize());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8