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 //------------------------------ValueTypeNode------------------------------------- 34 // Node representing a value type in C2 IR 35 class ValueTypeNode : public TypeNode { 36 private: 37 ValueTypeNode(const TypeValueType* t, Node* oop) 38 : TypeNode(t, Values + t->value_klass()->param_count()) { 39 init_class_id(Class_ValueType); 40 init_req(Oop, oop); 41 } 42 43 // Get the klass defining the field layout of the value type 44 ciValueKlass* get_value_klass() const { return type()->is_valuetype()->value_klass(); } 45 // Initialize the value type by loading its field values from memory 46 void load_values(PhaseGVN& gvn, Node* mem, ciInstanceKlass* holder, Node* base, int base_offset = 0); 47 // Store the field values to memory 48 void store_values(GraphKit* kit, ciInstanceKlass* holder, Node* base, int base_offset = 0) const; 49 50 enum { Control, // Control input 51 Oop, // Oop of TypeValueTypePtr 52 Values // Nodes corresponding to field values 53 }; 54 55 public: 56 // Create a new ValueTypeNode with uninitialized values 57 static Node* make(PhaseGVN& gvn, ciValueKlass* klass); 58 // Create a new ValueTypeNode and load its values from an oop 59 static Node* make(PhaseGVN& gvn, Node* mem, Node* oop); 60 // Create a new ValueTypeNode and load its values from a flattened value type field 61 static Node* make(PhaseGVN& gvn, ciValueKlass* klass, Node* mem, ciInstanceKlass* holder, Node* obj, int field_offset); 62 63 // Support for control flow merges 64 ValueTypeNode* clone_with_phis(PhaseGVN& gvn, Node* region); 65 Node* merge_with(GraphKit* kit, const ValueTypeNode* other, int pnum); 66 67 // Store the value type to memory if not yet allocated and returns the oop 68 Node* store_to_memory(GraphKit* kit); 69 // Store the value type in a field of an object 70 void store_to_field(GraphKit* kit, ciInstanceKlass* holder, Node* obj, int field_offset) const; 71 72 // Get oop for heap allocated value type (may be TypePtr::NULL_PTR) 73 Node* get_oop() const { return in(Oop); } 74 void set_oop(Node* oop) { set_req(Oop, oop); } 75 76 // Value type fields 77 uint field_count() const { return req() - Values; } 78 Node* get_field_value(uint index) const; 79 Node* get_field_value_by_offset(int offset, bool recursive = false) const; 80 void set_field_value(uint index, Node* value); 81 int get_field_offset(uint index) const; 82 ciType* get_field_type(uint index) const; 83 84 // Replace ValueTypeNodes in debug info at safepoints with SafePointScalarObjectNodes 85 void make_scalar_in_safepoints(Compile* C); 86 87 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape); 88 virtual int Opcode() const; 89 90 #ifndef PRODUCT 91 virtual void dump_spec(outputStream* st) const; 92 #endif 93 }; 94 95 #endif // SHARE_VM_OPTO_VALUETYPENODE_HPP