1 /*
 2  * Copyright (c) 2017, 2026, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
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24 
25 #ifndef SHARE_VM_CI_CIFLATARRAY_HPP
26 #define SHARE_VM_CI_CIFLATARRAY_HPP
27 
28 #include "ci/ciArray.hpp"
29 #include "ci/ciClassList.hpp"
30 #include "oops/flatArrayOop.hpp"
31 
32 // ciFlatArray
33 //
34 // This class represents a flatArrayOop in the HotSpot virtual machine.
35 class ciFlatArray : public ciArray {
36   CI_PACKAGE_ACCESS
37 
38 protected:
39   ciFlatArray(flatArrayHandle h_o) : ciArray(h_o) {}
40 
41   const char* type_string() override { return "ciFlatArray"; }
42 
43 public:
44   bool is_flat_array() const override { return true; }
45   bool is_flat() override { return true; }
46 
47   // Current value of an element at the specified offset.
48   // Returns T_ILLEGAL if there is no element at the given offset.
49   ciConstant element_value_by_offset(intptr_t element_offset) override;
50   ciConstant field_value_by_offset(intptr_t field_offset);
51   ciConstant field_value(int index, ciField* field);
52   ciConstant null_marker_of_element_by_offset(intptr_t element_offset);
53   ciConstant null_marker_of_element_by_index(int index);
54 
55 private:
56   ciConstant null_marker_of_element_by_offset_impl(arrayOop ary, int index);
57   ciConstant check_constant_null_marker_cache(int off);
58   void add_to_constant_null_marker_cache(int off, ciConstant val);
59 
60   GrowableArray<ConstantValue>* _constant_null_markers = nullptr;
61 };
62 
63 #endif // SHARE_VM_CI_CIFLATARRAY_HPP