[VM-Compiler] Don't inline if we don't have inlining budget enough to fully inline.

runtime/vm/compiler/backend/inliner.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_COMPILER_BACKEND_INLINER_H_
 #define RUNTIME_VM_COMPILER_BACKEND_INLINER_H_
 
 #include "vm/allocation.h"
 #include "vm/growable_array.h"
 
@@ skipping 14 matching lines @@
 class FlowGraphInliner : ValueObject {
  public:
   FlowGraphInliner(FlowGraph* flow_graph,
                    GrowableArray<const Function*>* inline_id_to_function,
                    GrowableArray<TokenPosition>* inline_id_to_token_pos,
                    GrowableArray<intptr_t>* caller_inline_id,
                    bool use_speculative_inlining,
                    GrowableArray<intptr_t>* inlining_black_list,
                    Precompiler* precompiler);
 
-  // The flow graph is destructively updated upon inlining.
-  void Inline();
+  // The flow graph is destructively updated upon inlining.  Returns the max
+  // depth that we inlined.
+  int Inline();
 
   // Compute graph info if it was not already computed or if 'force' is true.
   static void CollectGraphInfo(FlowGraph* flow_graph, bool force = false);
   static void SetInliningId(FlowGraph* flow_graph, intptr_t inlining_id);
 
   bool AlwaysInline(const Function& function);
 
   FlowGraph* flow_graph() const { return flow_graph_; }
   intptr_t NextInlineId(const Function& function,
                         TokenPosition tp,
@@ skipping 34 matching lines @@
   const bool use_speculative_inlining_;
   GrowableArray<intptr_t>* inlining_black_list_;
   Precompiler* precompiler_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphInliner);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_COMPILER_BACKEND_INLINER_H_