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 class ValueTypeBaseNode : public TypeNode { 34 protected: 35 ValueTypeBaseNode(const Type* t, int nb_fields, Compile* C) 36 : TypeNode(t, nb_fields) { 37 init_class_id(Class_ValueTypeBase); 38 C->add_value_type(this); 39 } 40 41 enum { Control, // Control input 42 Oop, // Oop of TypeValueTypePtr 43 Values // Nodes corresponding to values of the value type's fields. 44 // Nodes are connected in increasing order of the index of the field 45 // they correspond to. Field indeces are defined in ciValueKlass::_field_index_map. 46 }; 47 48 virtual const TypeValueTypePtr* value_type_ptr() const = 0; 49 // Get the klass defining the field layout of the value type 50 virtual ciValueKlass* value_klass() const = 0; 51 int make_scalar_in_safepoint(Unique_Node_List& worklist, SafePointNode* sfpt, Node* root, PhaseGVN* gvn); 52 53 static void make(PhaseGVN* gvn, Node*& ctl, Node* mem, Node* n, ValueTypeBaseNode* vt, ciValueKlass* base_vk, int base_offset, int base_input, bool in); 54 55 public: 56 // Support for control flow merges 57 bool has_phi_inputs(Node* region); 58 ValueTypeBaseNode* clone_with_phis(PhaseGVN* gvn, Node* region); 59 ValueTypeBaseNode* merge_with(PhaseGVN* gvn, const ValueTypeBaseNode* other, int pnum, bool transform); 60 61 // Get oop for heap allocated value type (may be TypePtr::NULL_PTR) 62 Node* get_oop() const { return in(Oop); } 63 void set_oop(Node* oop) { set_req(Oop, oop); } 64 65 // Value type fields 66 uint field_count() const { return req() - Values; } 67 Node* field_value(uint index) const; 68 Node* field_value_by_offset(int offset, bool recursive = false) const; 69 void set_field_value(uint index, Node* value); 70 int field_offset(uint index) const; 71 ciType* field_type(uint index) const; 72 bool field_is_flattened(uint index) const; 73 74 // Replace ValueTypeNodes in debug info at safepoints with SafePointScalarObjectNodes 75 void make_scalar_in_safepoints(Node* root, PhaseGVN* gvn); 76 77 // Store the value type as a flattened (headerless) representation 78 void store_flattened(GraphKit* kit, Node* base, Node* ptr, ciInstanceKlass* holder = NULL, int holder_offset = 0) const; 79 // Store the field values to memory 80 void store(GraphKit* kit, Node* base, Node* ptr, ciInstanceKlass* holder, int holder_offset = 0) const; 81 82 // Initialize the value type by loading its field values from memory 83 void load(PhaseGVN& gvn, Node*& ctl, Node* mem, Node* base, Node* ptr, ciInstanceKlass* holder, int holder_offset = 0); 84 85 // Allocates the value type (if not yet allocated) and returns the oop 86 ValueTypeBaseNode* allocate(GraphKit* kit); 87 bool is_allocated(PhaseGVN* phase) const; 88 89 void replace_call_results(GraphKit* kit, Node* call, Compile* C); 90 }; 91 92 //------------------------------ValueTypeNode------------------------------------- 93 // Node representing a value type in C2 IR 94 class ValueTypeNode : public ValueTypeBaseNode { 95 friend class ValueTypeBaseNode; 96 private: 97 ValueTypeNode(const TypeValueType* t, Node* oop, Compile* C) 98 : ValueTypeBaseNode(t, Values + t->value_klass()->nof_declared_nonstatic_fields(), C) { 99 init_class_id(Class_ValueType); 100 init_req(Oop, oop); 101 } 102 103 // Checks if the value type is loaded from memory and if so returns the oop 104 Node* is_loaded(PhaseGVN* phase, const TypeValueType* t, Node* base = NULL, int holder_offset = 0); 105 106 const TypeValueTypePtr* value_type_ptr() const { return TypeValueTypePtr::make(bottom_type()->isa_valuetype()); } 107 // Get the klass defining the field layout of the value type 108 ciValueKlass* value_klass() const { return type()->is_valuetype()->value_klass(); } 109 110 public: 111 // Create a new ValueTypeNode with uninitialized values 112 static ValueTypeNode* make(PhaseGVN& gvn, ciValueKlass* klass); 113 // Create a new ValueTypeNode with default values 114 static Node* make_default(PhaseGVN& gvn, ciValueKlass* vk); 115 // Create a new ValueTypeNode and load its values from an oop 116 static Node* make(GraphKit* kit, Node* oop, bool null_check = false); 117 static Node* make(PhaseGVN& gvn, Node*& ctl, Node* mem, Node* oop, bool null_check = false); 118 // Create a new ValueTypeNode and load its values from a flattened value type field or array 119 static Node* make(GraphKit* kit, ciValueKlass* vk, Node* obj, Node* ptr, ciInstanceKlass* holder = NULL, int holder_offset = 0); 120 static Node* make(PhaseGVN& gvn, ciValueKlass* vk, Node*& ctl, Node* mem, Node* obj, Node* ptr, ciInstanceKlass* holder = NULL, int holder_offset = 0); 121 // Create value type node from arguments at method entry and calls 122 static Node* make(PhaseGVN& gvn, Node*& ctl, Node* mem, Node* n, ciValueKlass* vk, int base_input, bool in); 123 124 // Allocate all non-flattened value type fields 125 Node* allocate_fields(GraphKit* kit); 126 127 Node* tagged_klass(PhaseGVN& gvn); 128 void pass_klass(Node* n, uint pos, const GraphKit& kit); 129 uint pass_fields(Node* call, int base_input, GraphKit& kit, bool assert_allocated = false, ciValueKlass* base_vk = NULL, int base_offset = 0); 130 131 // Allocation optimizations 132 void remove_redundant_allocations(PhaseIterGVN* igvn, PhaseIdealLoop* phase); 133 134 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape); 135 virtual int Opcode() const; 136 137 #ifndef PRODUCT 138 virtual void dump_spec(outputStream* st) const; 139 #endif 140 }; 141 142 //------------------------------ValueTypePtrNode------------------------------------- 143 // Node representing a value type as a pointer in C2 IR 144 class ValueTypePtrNode : public ValueTypeBaseNode { 145 private: 146 ciValueKlass* value_klass() const { return type()->is_valuetypeptr()->value_type()->value_klass(); } 147 const TypeValueTypePtr* value_type_ptr() const { return bottom_type()->isa_valuetypeptr(); } 148 149 ValueTypePtrNode(ciValueKlass* vk, Node* oop, Compile* C) 150 : ValueTypeBaseNode(TypeValueTypePtr::make(TypePtr::NotNull, vk), Values + vk->nof_declared_nonstatic_fields(), C) { 151 init_class_id(Class_ValueTypePtr); 152 init_req(Oop, oop); 153 } 154 public: 155 156 ValueTypePtrNode(ValueTypeNode* vt, Node* oop, Compile* C) 157 : ValueTypeBaseNode(TypeValueTypePtr::make(vt->type()->is_valuetype())->cast_to_ptr_type(TypePtr::NotNull), vt->req(), C) { 158 init_class_id(Class_ValueTypePtr); 159 for (uint i = Oop+1; i < vt->req(); i++) { 160 init_req(i, vt->in(i)); 161 } 162 init_req(Oop, oop); 163 } 164 165 static ValueTypePtrNode* make(GraphKit* kit, ciValueKlass* vk, CallNode* call); 166 static ValueTypePtrNode* make(PhaseGVN& gvn, Node*& ctl, Node* mem, Node* oop); 167 virtual int Opcode() const; 168 }; 169 170 #endif // SHARE_VM_OPTO_VALUETYPENODE_HPP