Add support for OSR in kernel-based FlowGraphBuilder

runtime/vm/kernel_to_il.h

 // Copyright (c) 2016, 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_KERNEL_TO_IL_H_
 #define RUNTIME_VM_KERNEL_TO_IL_H_
 
 #include "vm/growable_array.h"
 #include "vm/hash_map.h"
 
@@ skipping 725 matching lines @@
   void Push(Definition* definition);
   Value* Pop();
   Fragment Drop();
 
   bool IsInlining() { return exit_collector_ != NULL; }
 
   Token::Kind MethodKind(const dart::String& name);
 
   void InlineBailout(const char* reason);
 
+  // When compiling for OSR, remove blocks that are not reachable from the
+  // OSR entry point.
+  void PruneUnreachableIfOSR();
+
   Zone* zone_;
   TranslationHelper translation_helper_;
 
   // The node we are currently compiling (e.g. FunctionNode, Constructor,
   // Field)
   TreeNode* node_;
 
   ParsedFunction* parsed_function_;
   intptr_t osr_id_;
   const ZoneGrowableArray<const ICData*>& ic_data_array_;
@@ skipping 74 matching lines @@
   friend class SwitchBlock;
   friend class TryCatchBlock;
   friend class TryFinallyBlock;
 };
 
 }  // namespace kernel
 }  // namespace dart
 
 
 #endif  // RUNTIME_VM_KERNEL_TO_IL_H_