[turbofan] Lower HeapNumber allocations to Allocate nodes.

src/compiler/effect-control-linearizer.h

 // Copyright 2016 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.
 
 #ifndef V8_COMPILER_EFFECT_CONTROL_LINEARIZER_H_
 #define V8_COMPILER_EFFECT_CONTROL_LINEARIZER_H_
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/simplified-operator.h"
@@ skipping 37 matching lines @@
   ValueEffectControl LowerChangeFloat64ToTagged(Node* node, Node* effect,
                                                 Node* control);
   ValueEffectControl AllocateHeapNumberWithValue(Node* node, Node* effect,
                                                  Node* control);
 
   Node* ChangeInt32ToSmi(Node* value);
   Node* ChangeUint32ToSmi(Node* value);
   Node* ChangeInt32ToFloat64(Node* value);
   Node* ChangeUint32ToFloat64(Node* value);
 
-  Node* HeapNumberValueIndexConstant();
   Node* SmiMaxValueConstant();
   Node* SmiShiftBitsConstant();
 
   JSGraph* jsgraph() const { return js_graph_; }
   Graph* graph() const;
   Schedule* schedule() const { return schedule_; }
   Zone* temp_zone() const { return temp_zone_; }
   CommonOperatorBuilder* common() const;
   SimplifiedOperatorBuilder* simplified() const;
   MachineOperatorBuilder* machine() const;
 
   JSGraph* js_graph_;
   Schedule* schedule_;
   Zone* temp_zone_;
-  SetOncePointer<const Operator> allocate_heap_number_operator_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_EFFECT_CONTROL_LINEARIZER_H_