src/hotspot/share/opto/arraycopynode.cpp

*** 162,181 ****
    Node* src = in(ArrayCopyNode::Src);
    Node* dest = in(ArrayCopyNode::Dest);
    Node* ctl = in(TypeFunc::Control);
    Node* in_mem = in(TypeFunc::Memory);
  
!   const Type* src_type = phase->type(src);
  
    assert(src->is_AddP(), "should be base + off");
    assert(dest->is_AddP(), "should be base + off");
    Node* base_src = src->in(AddPNode::Base);
    Node* base_dest = dest->in(AddPNode::Base);
  
    MergeMemNode* mem = MergeMemNode::make(in_mem);
  
!   const TypeInstPtr* inst_src = src_type->isa_instptr();
  
    if (inst_src == NULL) {
      return NULL;
    }
  
--- 162,181 ----
    Node* src = in(ArrayCopyNode::Src);
    Node* dest = in(ArrayCopyNode::Dest);
    Node* ctl = in(TypeFunc::Control);
    Node* in_mem = in(TypeFunc::Memory);
  
!   const Type* dest_type = phase->type(dest);
  
    assert(src->is_AddP(), "should be base + off");
    assert(dest->is_AddP(), "should be base + off");
    Node* base_src = src->in(AddPNode::Base);
    Node* base_dest = dest->in(AddPNode::Base);
  
    MergeMemNode* mem = MergeMemNode::make(in_mem);
  
!   const TypeInstPtr* inst_src = dest_type->isa_instptr();
  
    if (inst_src == NULL) {
      return NULL;
    }
  
*** 583,592 ****
--- 583,603 ----
  
    if (count < 0 || count > ArrayCopyLoadStoreMaxElem) {
      return NULL;
    }
  
+   Node* src = in(ArrayCopyNode::Src);
+   Node* dest = in(ArrayCopyNode::Dest);
+   const Type* src_type = phase->type(src);
+   const Type* dest_type = phase->type(dest);
+ 
+   if (src_type->isa_aryptr() && dest_type->isa_instptr()) {
+     // clone used for load of unknown value type can't be optimized at
+     // this point
+     return NULL;
+   }
+ 
    Node* mem = try_clone_instance(phase, can_reshape, count);
    if (mem != NULL) {
      return (mem == NodeSentinel) ? NULL : mem;
    }
  
*** 620,631 ****
    }
    new_map->set_control(in(TypeFunc::Control));
    new_map->set_memory(MergeMemNode::make(in(TypeFunc::Memory)));
    new_map->set_i_o(in(TypeFunc::I_O));
  
-   Node* src = in(ArrayCopyNode::Src);
-   Node* dest = in(ArrayCopyNode::Dest);
    const TypeAryPtr* atp_src = get_address_type(phase, src);
    const TypeAryPtr* atp_dest = get_address_type(phase, dest);
    uint alias_idx_src = phase->C->get_alias_index(atp_src);
    uint alias_idx_dest = phase->C->get_alias_index(atp_dest);
  
--- 631,640 ----