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_OPTO_VALUETYPENODE_HPP 26 #define SHARE_VM_OPTO_VALUETYPENODE_HPP 27 28 #include "opto/node.hpp" 29 #include "opto/connode.hpp" 30 31 class GraphKit; 32 33 // TODO add comment 34 class ValueTypeNode : public TypeNode { 35 private: 36 ValueTypeNode(const TypeValueType* t, Node* oop) 37 : TypeNode(t, Values + t->value_klass()->field_count()) { 38 init_class_id(Class_ValueType); 39 init_req(Oop, oop); 40 } 41 ciValueKlass* get_value_klass() const { return type()->is_valuetype()->value_klass(); } 42 43 enum { Control, // Control input 44 Oop, // Oop of TypeValueTypePtr 45 Values // Nodes corresponding to field values 46 }; 47 48 public: 49 // Create a new ValueTypeNode with uninitialized values 50 static Node* make(PhaseGVN& gvn, ciValueKlass* klass); 51 // Create a new ValueTypeNode and load its values from memory 52 static Node* make(PhaseGVN& gvn, Node* mem, Node* oop); 53 54 // Stores the value type to memory if not yet allocated and returns the oop 55 Node* store_to_memory(GraphKit* kit); 56 57 // Get oop for heap allocated value type (may be TypePtr::NULL_PTR) 58 Node* get_oop() const { return in(Oop); } 59 void set_oop(Node* oop) { set_req(Oop, oop); } 60 61 // Value type fields 62 uint field_count() const { return req() - Values; } 63 Node* get_field_value(uint index) const; 64 Node* get_field_value_by_offset(int field_offset) const; 65 void set_field_value(uint index, Node* value); 66 int get_field_offset(uint index) const; 67 BasicType get_field_type(uint index) const; 68 69 // Replace ValueTypeNodes in debug info at safepoints with SafePointScalarObjectNodes 70 void make_scalar_in_safepoints(Compile* C); 71 72 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape); 73 virtual int Opcode() const; 74 75 #ifndef PRODUCT 76 virtual void dump_spec(outputStream* st) const; 77 #endif 78 }; 79 80 #endif // SHARE_VM_OPTO_VALUETYPENODE_HPP