[turbofan] Run inlining within the regular reducer fixpoint.

src/compiler/js-inlining-heuristic.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_INLINING_HEURISTIC_H_
 #define V8_COMPILER_JS_INLINING_HEURISTIC_H_
 
 #include "src/compiler/js-inlining.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 class JSInliningHeuristic final : public AdvancedReducer {
  public:
   enum Mode { kGeneralInlining, kRestrictedInlining, kStressInlining };
   JSInliningHeuristic(Editor* editor, Mode mode, Zone* local_zone,
                       CompilationInfo* info, JSGraph* jsgraph)
       : AdvancedReducer(editor),
         mode_(mode),
-        local_zone_(local_zone),
-        jsgraph_(jsgraph),
         inliner_(editor, local_zone, info, jsgraph),
         candidates_(local_zone),
+        seen_(local_zone),
         info_(info) {}
 
   Reduction Reduce(Node* node) final;
 
   // Processes the list of candidates gathered while the reducer was running,
   // and inlines call sites that the heuristic determines to be important.
-  void ProcessCandidates();
+  void Finalize() final;
 
  private:
   struct Candidate {
     Handle<JSFunction> function;  // The call target being inlined.
     Node* node;                   // The call site at which to inline.
     int calls;                    // Number of times the call site was hit.
   };
 
   // Comparator for candidates.
   struct CandidateCompare {
     bool operator()(const Candidate& left, const Candidate& right) const;
   };
 
   // Candidates are kept in a sorted set of unique candidates.
   typedef ZoneSet<Candidate, CandidateCompare> Candidates;
 
   // Dumps candidates to console.
   void PrintCandidates();
 
   Mode const mode_;
-  Zone* local_zone_;
-  JSGraph* jsgraph_;
   JSInliner inliner_;
   Candidates candidates_;
+  ZoneSet<NodeId> seen_;
   CompilationInfo* info_;
+  int cumulative_count_ = 0;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_INLINING_HEURISTIC_H_