Perform block ordering in-place.

src/hydrogen.h

 // Copyright 2012 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_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "v8.h"
 
 #include "accessors.h"
@@ skipping 133 matching lines @@
   bool IsUnreachable() const { return !is_reachable_; }
   bool IsReachable() const { return is_reachable_; }
 
   bool IsLoopSuccessorDominator() const {
     return dominates_loop_successors_;
   }
   void MarkAsLoopSuccessorDominator() {
     dominates_loop_successors_ = true;
   }
 
+  bool IsOrdered() const { return is_ordered_; }
+  void MarkAsOrdered() { is_ordered_ = true; }
+
   void MarkSuccEdgeUnreachable(int succ);
 
   inline Zone* zone() const;
 
 #ifdef DEBUG
   void Verify();
 #endif
 
  protected:
   friend class HGraphBuilder;
@@ skipping 36 matching lines @@
   int first_instruction_index_;
   int last_instruction_index_;
   ZoneList<int> deleted_phis_;
   HBasicBlock* parent_loop_header_;
   // For blocks marked as inline return target: the block with HEnterInlined.
   HBasicBlock* inlined_entry_block_;
   bool is_inline_return_target_ : 1;
   bool is_reachable_ : 1;
   bool dominates_loop_successors_ : 1;
   bool is_osr_entry_ : 1;
+  bool is_ordered_ : 1;
 };
 
 
 class HPredecessorIterator V8_FINAL BASE_EMBEDDED {
  public:
   explicit HPredecessorIterator(HBasicBlock* block)
       : predecessor_list_(block->predecessors()), current_(0) { }
 
   bool Done() { return current_ >= predecessor_list_->length(); }
   HBasicBlock* Current() { return predecessor_list_->at(current_); }
@@ skipping 2581 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_