Devirtualize AstNode and subclasses, except for visiting-related methods.

src/crankshaft/hydrogen.h

Index: src/crankshaft/hydrogen.h
diff --git a/src/crankshaft/hydrogen.h b/src/crankshaft/hydrogen.h
index 1a83ba0c901ad71494068bab4508b36d5c1d675e..66b50ed38e07adf85fd6a50ac7b9ceafbc210da5 100644
--- a/src/crankshaft/hydrogen.h
+++ b/src/crankshaft/hydrogen.h
@@ -2271,8 +2271,8 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
   void VisitLogicalExpression(BinaryOperation* expr);
   void VisitArithmeticExpression(BinaryOperation* expr);
 
-  void VisitLoopBody(IterationStatement* stmt,
-                     HBasicBlock* loop_entry);
+  template <class IterationStatement>
+  void VisitLoopBody(IterationStatement* stmt, HBasicBlock* loop_entry);
 
   void BuildForInBody(ForInStatement* stmt, Variable* each_var,
                       HValue* enumerable);
@@ -2296,6 +2296,7 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
   // Builds a loop entry respectful of OSR requirements
   HBasicBlock* BuildLoopEntry(IterationStatement* statement);
 
+  template <class IterationStatement>
   HBasicBlock* JoinContinue(IterationStatement* statement,
                             HBasicBlock* exit_block,
                             HBasicBlock* continue_block);
@@ -2685,6 +2686,7 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
                                  BailoutId ast_id, BailoutId return_id,
                                  bool can_inline_accessor = true);
 
+  template <class Expression>
   HValue* BuildNamedAccess(PropertyAccessType access, BailoutId ast_id,
                            BailoutId reutrn_id, Expression* expr,
                            FeedbackVectorSlot slot, HValue* object,
@@ -2747,6 +2749,7 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
       HValue* val, SmallMapList* maps, PropertyAccessType access_type,
       KeyedAccessStoreMode store_mode, bool* has_side_effects);
 
+  template <class Expression>
   HValue* HandleKeyedElementAccess(HValue* obj, HValue* key, HValue* val,
                                    Expression* expr, FeedbackVectorSlot slot,
                                    BailoutId ast_id, BailoutId return_id,
@@ -2766,11 +2769,13 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
                 HValue* object,
                 HValue* key);
 
+  template <class Expression>
   void BuildStoreForEffect(Expression* expression, Property* prop,
                            FeedbackVectorSlot slot, BailoutId ast_id,
                            BailoutId return_id, HValue* object, HValue* key,
                            HValue* value);
 
+  template <class Expression>
   void BuildStore(Expression* expression, Property* prop,
                   FeedbackVectorSlot slot, BailoutId ast_id,
                   BailoutId return_id, bool is_uninitialized = false);