src/share/vm/ci/ciInstanceKlass.hpp

rev 7200 : 6700100: optimize inline_native_clone() for small objects with exact klass
Summary: optimize small instance clones as loads/stores
Reviewed-by:

*** 62,78 ****
--- 62,82 ----
    ciInstanceKlass*       _super;
    ciInstance*            _java_mirror;
  
    ciConstantPoolCache*   _field_cache;  // cached map index->field
    GrowableArray<ciField*>* _nonstatic_fields;
+   int                    _has_injected_fields; // any non static injected fields? lazily initialized.
    
    // The possible values of the _implementor fall into following three cases:
    //   NULL: no implementor.
    //   A ciInstanceKlass that's not itself: one implementor.
    //   Itsef: more than one implementors.
    ciInstanceKlass*       _implementor;
  
+   bool compute_injected_fields();
+   void compute_injected_fields_helper();
+ 
  protected:
    ciInstanceKlass(KlassHandle h_k);
    ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain);
  
    InstanceKlass* get_instanceKlass() const {
*** 184,193 ****
--- 188,205 ----
      if (_nonstatic_fields == NULL)
        return compute_nonstatic_fields();
      else
        return _nonstatic_fields->length();
    }
+ 
+   bool has_injected_fields() {
+     if (_has_injected_fields == -1) {
+       return compute_injected_fields();
+     }
+     return _has_injected_fields > 0 ? true : false;
+   }
+ 
    // nth nonstatic field (presented by ascending address)
    ciField* nonstatic_field_at(int i) {
      assert(_nonstatic_fields != NULL, "");
      return _nonstatic_fields->at(i);
    }