Optimize functions containing try-catch.

runtime/vm/flow_graph_allocator.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_FLOW_GRAPH_ALLOCATOR_H_
 #define VM_FLOW_GRAPH_ALLOCATOR_H_
 
 #include "vm/flow_graph.h"
 #include "vm/growable_array.h"
 #include "vm/intermediate_language.h"
@@ skipping 83 matching lines @@
   // Discover structural (reducible) loops nesting structure.
   // It will be used later in SplitBetween heuristic that selects an
   // optimal splitting position.
   void DiscoverLoops();
 
   LiveRange* MakeLiveRangeForTemporary();
 
   // Visit instructions in the postorder and build live ranges for
   // all SSA values.
   void BuildLiveRanges();
+
   Instruction* ConnectOutgoingPhiMoves(BlockEntryInstr* block,
                                        BitVector* interference_set);
   void ProcessEnvironmentUses(BlockEntryInstr* block, Instruction* current);
   void ProcessMaterializationUses(BlockEntryInstr* block,
                                   const intptr_t block_start_pos,
                                   const intptr_t use_pos,
                                   MaterializeObjectInstr* mat);
   void ProcessOneInstruction(BlockEntryInstr* block,
                              Instruction* instr,
                              BitVector* interference_set);
-  void ConnectIncomingPhiMoves(BlockEntryInstr* block);
+  void ProcessInitialDefinition(Definition* defn,
+                                LiveRange* range,
+                                BlockEntryInstr* block);
+  void ConnectIncomingPhiMoves(JoinEntryInstr* join);
   void BlockLocation(Location loc, intptr_t from, intptr_t to);
   void BlockRegisterLocation(Location loc,
                              intptr_t from,
                              intptr_t to,
                              bool* blocked_registers,
                              LiveRange** blocking_ranges);
 
   intptr_t NumberOfRegisters() const { return number_of_registers_; }
 
   // Find all safepoints that are covered by this live range.
@@ skipping 517 matching lines @@
 
   AllocationFinger finger_;
 
   DISALLOW_COPY_AND_ASSIGN(LiveRange);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_ALLOCATOR_H_