src/hotspot/share/ci/ciArrayKlass.cpp - master - githubmirror/panama-vector

src/hotspot/share/ci/ciArrayKlass.cpp
133 строки4 KB
Christian Hagedorn
8388007: [lworld] [Umbrella] Adressing remaining compiler review comments from the Valhalla PR
03 авг 2026, 09:09
03 авг 2026, 09:09ba05044
/*
 * Copyright (c) 1999, 2025, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#include "ci/ciArrayKlass.hpp"
#include "ci/ciObjArrayKlass.hpp"
#include "ci/ciTypeArrayKlass.hpp"
#include "ci/ciUtilities.inline.hpp"
#include "memory/universe.hpp"
#include "oops/arrayKlass.hpp"

// ciArrayKlass
//
// This class represents a Klass* in the HotSpot virtual machine
// whose Klass part in an ArrayKlass.

// ------------------------------------------------------------------
// ciArrayKlass::ciArrayKlass
//
// Loaded array klass.
ciArrayKlass::ciArrayKlass(Klass* k) : ciKlass(k) {
  assert(get_Klass()->is_array_klass(), "wrong type");
  _dimension = get_ArrayKlass()->dimension();
}

// ------------------------------------------------------------------
// ciArrayKlass::ciArrayKlass
//
// Unloaded array klass.
ciArrayKlass::ciArrayKlass(ciSymbol* name, int dimension, BasicType bt)
  : ciKlass(name, bt) {
  _dimension = dimension;
}

// ------------------------------------------------------------------
// ciArrayKlass::element_type
//
// What type is obtained when this array is indexed once?
ciType* ciArrayKlass::element_type() {
  if (is_type_array_klass()) {
    return ciType::make(as_type_array_klass()->element_type());
  } else {
    return as_obj_array_klass()->element_klass()->as_klass();
  }
}


// ------------------------------------------------------------------
// ciArrayKlass::base_element_type
//
// What type is obtained when this array is indexed as many times as possible?
ciType* ciArrayKlass::base_element_type() {
  if (is_type_array_klass()) {
    return ciType::make(as_type_array_klass()->element_type());
  } else {
    ciKlass* ek = as_obj_array_klass()->base_element_klass();
    if (ek->is_type_array_klass()) {
      return ciType::make(ek->as_type_array_klass()->element_type());
    }
    return ek;
  }
}


// ------------------------------------------------------------------
// ciArrayKlass::is_leaf_type
bool ciArrayKlass::is_leaf_type() {
  if (is_type_array_klass()) {
    return true;
  } else {
    return as_obj_array_klass()->base_element_klass()->is_leaf_type();
  }
}


// ------------------------------------------------------------------
// ciArrayKlass::make
//
// Make an array klass of the specified element type.
ciArrayKlass* ciArrayKlass::make(ciType* element_type, bool null_free, bool atomic, bool refined_type) {
  if (element_type->is_primitive_type()) {
    return ciTypeArrayKlass::make(element_type->basic_type());
  } else {
    return ciObjArrayKlass::make(element_type->as_klass(), refined_type, null_free, atomic);
  }
}

int ciArrayKlass::array_header_in_bytes() {
  return get_ArrayKlass()->array_header_in_bytes();
}

ciInstance* ciArrayKlass::component_mirror_instance() const {
  GUARDED_VM_ENTRY(
    oop component_mirror = ArrayKlass::cast(get_Klass())->component_mirror();
    return CURRENT_ENV->get_instance(component_mirror);
  )
}

bool ciArrayKlass::is_elem_null_free() const {
  ArrayProperties props = properties();
  assert(props.is_valid(), "meaningless");
  return props.is_null_restricted();
}

bool ciArrayKlass::is_elem_atomic() const {
  ArrayProperties props = properties();
  assert(props.is_valid(), "meaningless");
  return !props.is_non_atomic();
}

ArrayProperties ciArrayKlass::properties() const {
  GUARDED_VM_ENTRY(return ArrayKlass::cast(get_Klass())->properties();)
}