[turbofan] Initial support for the %_DateField intrinsic.

src/compiler/js-intrinsic-lowering.h

 // Copyright 2015 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_JS_INTRINSIC_LOWERING_H_
 #define V8_COMPILER_JS_INTRINSIC_LOWERING_H_
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/simplified-operator.h"
@@ skipping 14 matching lines @@
   enum DeoptimizationMode { kDeoptimizationEnabled, kDeoptimizationDisabled };
 
   JSIntrinsicLowering(Editor* editor, JSGraph* jsgraph,
                       DeoptimizationMode mode);
   ~JSIntrinsicLowering() final {}
 
   Reduction Reduce(Node* node) final;
 
  private:
   Reduction ReduceConstructDouble(Node* node);
+  Reduction ReduceDateField(Node* node);
   Reduction ReduceDeoptimizeNow(Node* node);
   Reduction ReduceDoubleHi(Node* node);
   Reduction ReduceDoubleLo(Node* node);
   Reduction ReduceHeapObjectGetMap(Node* node);
   Reduction ReduceIncrementStatsCounter(Node* node);
   Reduction ReduceIsMinusZero(Node* node);
   Reduction ReduceIsInstanceType(Node* node, InstanceType instance_type);
   Reduction ReduceIsNonNegativeSmi(Node* node);
   Reduction ReduceIsSmi(Node* node);
   Reduction ReduceJSValueGetValue(Node* node);
@@ skipping 25 matching lines @@
   JSGraph* const jsgraph_;
   DeoptimizationMode const mode_;
   SimplifiedOperatorBuilder simplified_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_INTRINSIC_LOWERING_H_