[turbofan] Introduce DeoptimizeIf And DeoptimizeUnless common operators.

src/compiler/js-native-context-specialization.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_NATIVE_CONTEXT_SPECIALIZATION_H_
 #define V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/graph-reducer.h"
 
@@ skipping 67 matching lines @@
                               Node* index = nullptr);
 
   Reduction ReduceSoftDeoptimize(Node* node);
 
   // Adds stability dependencies on all prototypes of every class in
   // {receiver_type} up to (and including) the {holder}.
   void AssumePrototypesStable(Type* receiver_type,
                               Handle<Context> native_context,
                               Handle<JSObject> holder);
 
-  // Assuming that {if_projection} is either IfTrue or IfFalse, adds a hint on
-  // the dominating Branch that {if_projection} is the unlikely (deferred) case.
-  void MarkAsDeferred(Node* if_projection);
-
   // Retrieve the native context from the given {node} if known.
   MaybeHandle<Context> GetNativeContext(Node* node);
 
   Graph* graph() const;
   JSGraph* jsgraph() const { return jsgraph_; }
   Isolate* isolate() const;
   Factory* factory() const;
   CommonOperatorBuilder* common() const;
   JSOperatorBuilder* javascript() const;
   SimplifiedOperatorBuilder* simplified() const;
@@ skipping 13 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(JSNativeContextSpecialization);
 };
 
 DEFINE_OPERATORS_FOR_FLAGS(JSNativeContextSpecialization::Flags)
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_