1 /* 2 * Copyright (c) 2016, 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 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_CI_CIVALUEKLASS_HPP 26 #define SHARE_VM_CI_CIVALUEKLASS_HPP 27 28 #include "ci/ciConstantPoolCache.hpp" 29 #include "ci/ciEnv.hpp" 30 #include "ci/ciFlags.hpp" 31 #include "ci/ciInstanceKlass.hpp" 32 #include "ci/ciSymbol.hpp" 33 #include "oops/valueKlass.hpp" 34 35 // ciValueKlass 36 // 37 // Specialized ciInstanceKlass for value types. 38 class ciValueKlass : public ciInstanceKlass { 39 CI_PACKAGE_ACCESS 40 41 private: 42 // Index fields of a value type, indeces range from 0 to the number of fields of the 43 // value type - 1. 44 // For each index constructed, _field_index_map records the field's index 45 // in InstanceKlass::_fields (i.e., _field_index_map records the value returned by 46 // fieldDescriptor::index() for each field). 47 GrowableArray<int>* _field_index_map; 48 49 protected: 50 ciValueKlass(Klass* h_k) : ciInstanceKlass(h_k), _field_index_map(NULL) { 51 assert(is_final(), "ValueKlass must be final"); 52 }; 53 54 const char* type_string() { return "ciValueKlass"; } 55 int compute_field_index_map(); 56 57 ValueKlass* get_valueKlass() const { 58 return ValueKlass::cast(get_Klass()); 59 } 60 61 public: 62 bool is_valuetype() const { return true; } 63 bool flatten_array() const; 64 bool contains_oops() const; 65 66 // Value type fields 67 int field_count(); 68 int field_size(); 69 int flattened_field_count() { 70 return nof_nonstatic_fields(); 71 } 72 int field_index_by_offset(int offset); 73 int field_offset_by_index(int index); 74 ciType* field_type_by_index(int index); 75 int first_field_offset() const; 76 77 int value_arg_slots(); 78 79 // Can a value type instance of this type be returned as multiple 80 // returned values? 81 bool can_be_returned_as_fields() const { 82 return this != ciEnv::current()->___Value_klass() && get_valueKlass()->return_regs() != NULL; 83 } 84 }; 85 86 #endif // SHARE_VM_CI_CIVALUEKLASS_HPP | 1 /* 2 * Copyright (c) 2017, 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 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_CI_CIVALUEKLASS_HPP 26 #define SHARE_VM_CI_CIVALUEKLASS_HPP 27 28 #include "ci/ciConstantPoolCache.hpp" 29 #include "ci/ciEnv.hpp" 30 #include "ci/ciFlags.hpp" 31 #include "ci/ciInstanceKlass.hpp" 32 #include "ci/ciSymbol.hpp" 33 #include "oops/valueKlass.hpp" 34 35 // ciValueKlass 36 // 37 // Specialized ciInstanceKlass for value types. 38 class ciValueKlass : public ciInstanceKlass { 39 CI_PACKAGE_ACCESS 40 41 private: 42 // Fields declared in the bytecode (without flattened value type fields) 43 GrowableArray<ciField*>* _declared_nonstatic_fields; 44 45 protected: 46 ciValueKlass(Klass* h_k) : ciInstanceKlass(h_k), _declared_nonstatic_fields(NULL) { 47 assert(is_final(), "ValueKlass must be final"); 48 }; 49 50 int compute_nonstatic_fields(); 51 const char* type_string() { return "ciValueKlass"; } 52 53 public: 54 bool is_valuetype() const { return true; } 55 56 int nof_declared_nonstatic_fields() { 57 if (_declared_nonstatic_fields == NULL) { 58 compute_nonstatic_fields(); 59 } 60 return _declared_nonstatic_fields->length(); 61 } 62 63 // ith non-static declared field (presented by ascending address) 64 ciField* declared_nonstatic_field_at(int i) { 65 assert(_declared_nonstatic_fields != NULL, "should be initialized"); 66 return _declared_nonstatic_fields->at(i); 67 } 68 69 // Value type fields 70 int first_field_offset() const; 71 int field_index_by_offset(int offset); 72 73 bool flatten_array() const; 74 bool can_be_returned_as_fields() const; 75 int value_arg_slots(); 76 }; 77 78 #endif // SHARE_VM_CI_CIVALUEKLASS_HPP |