1 /* 2 * Copyright (c) 1999, 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 #include "precompiled.hpp" 26 #include "c1/c1_ValueType.hpp" 27 #include "ci/ciArray.hpp" 28 #include "ci/ciInstance.hpp" 29 #include "ci/ciNullObject.hpp" 30 #include "memory/resourceArea.hpp" 31 32 33 // predefined types 34 VoidType* voidType = NULL; 35 IntType* intType = NULL; 36 LongType* longType = NULL; 37 FloatType* floatType = NULL; 38 DoubleType* doubleType = NULL; 39 ObjectType* objectType = NULL; 40 ArrayType* arrayType = NULL; 41 InstanceType* instanceType = NULL; 42 ClassType* classType = NULL; 43 AddressType* addressType = NULL; 44 IllegalType* illegalType = NULL; 45 46 47 // predefined constants 48 IntConstant* intZero = NULL; 49 IntConstant* intOne = NULL; 50 ObjectConstant* objectNull = NULL; 51 52 53 void ValueType::initialize(Arena* arena) { 54 // Note: Must initialize all types for each compilation 55 // as they are allocated within a ResourceMark! 56 57 // types 58 voidType = new (arena) VoidType(); 59 intType = new (arena) IntType(); 60 longType = new (arena) LongType(); 61 floatType = new (arena) FloatType(); 62 doubleType = new (arena) DoubleType(); 63 objectType = new (arena) ObjectType(); 64 arrayType = new (arena) ArrayType(); 65 instanceType = new (arena) InstanceType(); 66 classType = new (arena) ClassType(); 67 addressType = new (arena) AddressType(); 68 illegalType = new (arena) IllegalType(); 69 70 intZero = new (arena) IntConstant(0); 71 intOne = new (arena) IntConstant(1); 72 objectNull = new (arena) ObjectConstant(ciNullObject::make()); 73 }; 74 75 76 ValueType* ValueType::meet(ValueType* y) const { 77 // incomplete & conservative solution for now - fix this! 78 assert(tag() == y->tag(), "types must match"); 79 return base(); 80 } 81 82 83 ValueType* ValueType::join(ValueType* y) const { 84 Unimplemented(); 85 return NULL; 86 } 87 88 89 ciType* ObjectConstant::exact_type() const { 90 ciObject* c = constant_value(); 91 return (c != NULL && !c->is_null_object()) ? c->klass() : NULL; 92 } 93 ciType* ArrayConstant::exact_type() const { 94 ciObject* c = constant_value(); 95 return (c != NULL && !c->is_null_object()) ? c->klass() : NULL; 96 } 97 ciType* InstanceConstant::exact_type() const { 98 ciObject* c = constant_value(); 99 return (c != NULL && !c->is_null_object()) ? c->klass() : NULL; 100 } 101 ciType* ClassConstant::exact_type() const { 102 return Compilation::current()->env()->Class_klass(); 103 } 104 105 106 jobject ObjectType::encoding() const { 107 assert(is_constant(), "must be"); 108 return constant_value()->constant_encoding(); 109 } 110 111 bool ObjectType::is_loaded() const { 112 assert(is_constant(), "must be"); 113 return constant_value()->is_loaded(); 114 } 115 116 bool MetadataType::is_loaded() const { 117 assert(is_constant(), "must be"); 118 return constant_value()->is_loaded(); 119 } 120 121 ciObject* ObjectConstant::constant_value() const { return _value; } 122 ciObject* ArrayConstant::constant_value() const { return _value; } 123 ciObject* InstanceConstant::constant_value() const { return _value; } 124 125 ValueType* as_ValueType(BasicType type) { 126 switch (type) { 127 case T_VOID : return voidType; 128 case T_BYTE : // fall through 129 case T_CHAR : // fall through 130 case T_SHORT : // fall through 131 case T_BOOLEAN: // fall through 132 case T_INT : return intType; 133 case T_LONG : return longType; 134 case T_FLOAT : return floatType; 135 case T_DOUBLE : return doubleType; 136 case T_ARRAY : return arrayType; 137 case T_OBJECT : return objectType; 138 case T_VALUETYPE: return objectType; 139 case T_ADDRESS: return addressType; 140 case T_ILLEGAL: return illegalType; 141 default : ShouldNotReachHere(); 142 return illegalType; 143 } 144 } 145 146 147 ValueType* as_ValueType(ciConstant value) { 148 switch (value.basic_type()) { 149 case T_BYTE : // fall through 150 case T_CHAR : // fall through 151 case T_SHORT : // fall through 152 case T_BOOLEAN: // fall through 153 case T_INT : return new IntConstant (value.as_int ()); 154 case T_LONG : return new LongConstant (value.as_long ()); 155 case T_FLOAT : return new FloatConstant (value.as_float ()); 156 case T_DOUBLE : return new DoubleConstant(value.as_double()); 157 case T_ARRAY : // fall through (ciConstant doesn't have an array accessor) 158 case T_VALUETYPE: // fall through 159 case T_OBJECT : { 160 // TODO: Common the code with GraphBuilder::load_constant? 161 ciObject* obj = value.as_object(); 162 if (obj->is_null_object()) 163 return objectNull; 164 if (obj->is_loaded()) { 165 if (obj->is_array()) 166 return new ArrayConstant(obj->as_array()); 167 else if (obj->is_instance()) 168 return new InstanceConstant(obj->as_instance()); 169 } 170 return new ObjectConstant(obj); 171 } 172 default : ShouldNotReachHere(); 173 return illegalType; 174 } 175 } 176 177 178 BasicType as_BasicType(ValueType* type) { 179 switch (type->tag()) { 180 case voidTag: return T_VOID; 181 case intTag: return T_INT; 182 case longTag: return T_LONG; 183 case floatTag: return T_FLOAT; 184 case doubleTag: return T_DOUBLE; 185 case objectTag: return T_OBJECT; 186 case metaDataTag:return T_METADATA; 187 case addressTag: return T_ADDRESS; 188 case illegalTag: return T_ILLEGAL; 189 default : ShouldNotReachHere(); 190 return T_ILLEGAL; 191 } 192 }