[turbofan] Introduce DeoptimizeIf And DeoptimizeUnless common operators.

src/compiler/branch-elimination.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_BRANCH_CONDITION_ELIMINATION_H_
 #define V8_COMPILER_BRANCH_CONDITION_ELIMINATION_H_
 
 #include "src/compiler/graph-reducer.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
+// Forward declarations.
+class CommonOperatorBuilder;
 class JSGraph;
 
 
 class BranchElimination final : public AdvancedReducer {
  public:
   BranchElimination(Editor* editor, JSGraph* js_graph, Zone* zone);
   ~BranchElimination() final;
 
   Reduction Reduce(Node* node) final;
 
@@ skipping 42 matching lines @@
     PathConditionsForControlNodes(Zone* zone, size_t size_hint)
         : info_for_node_(size_hint, nullptr, zone) {}
     const ControlPathConditions* Get(Node* node);
     void Set(Node* node, const ControlPathConditions* conditions);
 
    private:
     ZoneVector<const ControlPathConditions*> info_for_node_;
   };
 
   Reduction ReduceBranch(Node* node);
+  Reduction ReduceDeoptimizeConditional(Node* node);
   Reduction ReduceIf(Node* node, bool is_true_branch);
   Reduction ReduceLoop(Node* node);
   Reduction ReduceMerge(Node* node);
   Reduction ReduceStart(Node* node);
   Reduction ReduceOtherControl(Node* node);
 
   Reduction TakeConditionsFromFirstControl(Node* node);
   Reduction UpdateConditions(Node* node,
                              const ControlPathConditions* conditions);
 
   Node* dead() const { return dead_; }
+  Graph* graph() const;
+  JSGraph* jsgraph() const { return jsgraph_; }
+  CommonOperatorBuilder* common() const;
 
+  JSGraph* const jsgraph_;
   PathConditionsForControlNodes node_conditions_;
   Zone* zone_;
   Node* dead_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_BRANCH_CONDITION_ELIMINATION_H_