381 

   381 

   382 //------------------------------PhaseIterGVN-----------------------------------

   382 //------------------------------PhaseIterGVN-----------------------------------

   383 // Phase for iteratively performing local, pessimistic GVN-style optimizations.

   383 // Phase for iteratively performing local, pessimistic GVN-style optimizations.

   384 // and ideal transformations on the graph.

   384 // and ideal transformations on the graph.

   385 class PhaseIterGVN : public PhaseGVN {

   385 class PhaseIterGVN : public PhaseGVN {

   386   // Idealize old Node 'n' with respect to its inputs and its value

   390   // Idealize old Node 'n' with respect to its inputs and its value

   387   virtual Node *transform_old( Node *a_node );

   391   virtual Node *transform_old( Node *a_node );

   388 protected:

   392 protected:

   389 

   393 

   390   // Idealize new Node 'n' with respect to its inputs and its value

   394   // Idealize new Node 'n' with respect to its inputs and its value

   444     add_users_to_worklist(old);

   448     add_users_to_worklist(old);

   445     hash_delete(old);

   449     hash_delete(old);

   446     subsume_node(old, nn);

   450     subsume_node(old, nn);

   447   }

   451   }

   448 

   452 

   449 #ifndef PRODUCT

   457 #ifndef PRODUCT

   450 protected:

   458 protected:

   451   // Sub-quadratic implementation of VerifyIterativeGVN.

   459   // Sub-quadratic implementation of VerifyIterativeGVN.

   452   unsigned long _verify_counter;

   460   unsigned long _verify_counter;

   453   unsigned long _verify_full_passes;

   461   unsigned long _verify_full_passes;