Revert of [turbofan] Implemented the TruncateFloat32ToInt64 TurboFan operator.

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 829 matching lines @@
     case IrOpcode::kChangeFloat32ToFloat64:
       return MarkAsFloat64(node), VisitChangeFloat32ToFloat64(node);
     case IrOpcode::kChangeInt32ToFloat64:
       return MarkAsFloat64(node), VisitChangeInt32ToFloat64(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::kTruncateFloat32ToInt64:
-      return MarkAsWord64(node), VisitTruncateFloat32ToInt64(node);
     case IrOpcode::kTruncateFloat64ToInt64:
       return MarkAsWord64(node), VisitTruncateFloat64ToInt64(node);
     case IrOpcode::kTruncateFloat64ToUint64:
       return MarkAsWord64(node), VisitTruncateFloat64ToUint64(node);
     case IrOpcode::kChangeInt32ToInt64:
       return MarkAsWord64(node), VisitChangeInt32ToInt64(node);
     case IrOpcode::kChangeUint32ToUint64:
       return MarkAsWord64(node), VisitChangeUint32ToUint64(node);
     case IrOpcode::kTruncateFloat64ToFloat32:
       return MarkAsFloat32(node), VisitTruncateFloat64ToFloat32(node);
@@ skipping 228 matching lines @@
 void InstructionSelector::VisitChangeInt32ToInt64(Node* node) {
   UNIMPLEMENTED();
 }
 
 
 void InstructionSelector::VisitChangeUint32ToUint64(Node* node) {
   UNIMPLEMENTED();
 }
 
 
-void InstructionSelector::VisitTruncateFloat32ToInt64(Node* node) {
-  UNIMPLEMENTED();
-}
-
-
 void InstructionSelector::VisitTruncateFloat64ToInt64(Node* node) {
   UNIMPLEMENTED();
 }
 
 
 void InstructionSelector::VisitTruncateFloat64ToUint64(Node* node) {
   UNIMPLEMENTED();
 }
 
 
@@ skipping 351 matching lines @@
   return new (instruction_zone()) FrameStateDescriptor(
       instruction_zone(), state_info.type(), state_info.bailout_id(),
       state_info.state_combine(), parameters, locals, stack,
       state_info.shared_info(), outer_state);
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8