Use constants from the frame at OSR entry.

runtime/vm/intermediate_language.h

 // Copyright (c) 2013, 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 VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 1398 matching lines @@
 
   intptr_t entry_count() const { return entry_count_; }
   void set_entry_count(intptr_t count) { entry_count_ = count; }
 
   intptr_t spill_slot_count() const { return spill_slot_count_; }
   void set_spill_slot_count(intptr_t count) {
     ASSERT(count >= 0);
     spill_slot_count_ = count;
   }
 
-  // Number of stack slots reserved for compiling try-catch. For functions
-  // without try-catch, this is 0. Otherwise, it is the number of local
-  // variables.
-  intptr_t fixed_slot_count() const { return fixed_slot_count_; }
-  void set_fixed_slot_count(intptr_t count) {
-    ASSERT(count >= 0);
-    fixed_slot_count_ = count;
-  }
   TargetEntryInstr* normal_entry() const { return normal_entry_; }
 
   const ParsedFunction& parsed_function() const {
     return *parsed_function_;
   }
 
   const GrowableArray<CatchBlockEntryInstr*>& catch_entries() const {
     return catch_entries_;
   }
 
   virtual void PrintTo(BufferFormatter* f) const;
 
  private:
   virtual void ClearPredecessors() {}
   virtual void AddPredecessor(BlockEntryInstr* predecessor) { UNREACHABLE(); }
 
   const ParsedFunction* parsed_function_;
   TargetEntryInstr* normal_entry_;
   GrowableArray<CatchBlockEntryInstr*> catch_entries_;
   GrowableArray<Definition*> initial_definitions_;
   const intptr_t osr_id_;
   intptr_t entry_count_;
   intptr_t spill_slot_count_;
-  intptr_t fixed_slot_count_;  // For try-catch in optimized code.
 
   DISALLOW_COPY_AND_ASSIGN(GraphEntryInstr);
 };
 
 
 class JoinEntryInstr : public BlockEntryInstr {
  public:
   JoinEntryInstr(intptr_t block_id, intptr_t try_index)
       : BlockEntryInstr(block_id, try_index),
         predecessors_(2),  // Two is the assumed to be the common case.
@@ skipping 5655 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_