FlowGraphCompiler is not a visitor any longer. Start consolidating shared code between the x64 and …

runtime/vm/intermediate_language.h

Index: runtime/vm/intermediate_language.h
===================================================================
--- runtime/vm/intermediate_language.h	(revision 8180)
+++ runtime/vm/intermediate_language.h	(working copy)
@@ -1602,6 +1602,8 @@
 
   void AddCatchEntry(TargetEntryInstr* entry) { catch_entries_.Add(entry); }
 
+  virtual void EmitNativeCode(FlowGraphCompiler* compiler);
+
  private:
   TargetEntryInstr* normal_entry_;
   GrowableArray<TargetEntryInstr*> catch_entries_;
@@ -1635,6 +1637,8 @@
     successor_ = instr;
   }
 
+  virtual void EmitNativeCode(FlowGraphCompiler* compiler);
+
  private:
   ZoneGrowableArray<BlockEntryInstr*> predecessors_;
   Instruction* successor_;
@@ -1689,6 +1693,8 @@
     return try_index_;
   }
 
+  virtual void EmitNativeCode(FlowGraphCompiler* compiler);
+
  private:
   BlockEntryInstr* predecessor_;
   Instruction* successor_;
@@ -1972,13 +1978,6 @@
 #undef DECLARE_VISIT_INSTRUCTION
 
  protected:
-  // Map a block number in a forward iteration into the block number in the
-  // corresponding reverse iteration.  Used to obtain an index into
-  // block_order for reverse iterations.
-  intptr_t reverse_index(intptr_t index) const {
-    return block_order_.length() - index - 1;
-  }
-
   const GrowableArray<BlockEntryInstr*>& block_order_;
 
  private: