1 /* 2 * Copyright (c) 1997, 2019, 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_OPTO_ADDNODE_HPP 26 #define SHARE_OPTO_ADDNODE_HPP 27 28 #include "opto/node.hpp" 29 #include "opto/opcodes.hpp" 30 #include "opto/type.hpp" 31 32 // Portions of code courtesy of Clifford Click 33 34 class PhaseTransform; 35 36 //------------------------------AddNode---------------------------------------- 37 // Classic Add functionality. This covers all the usual 'add' behaviors for 38 // an algebraic ring. Add-integer, add-float, add-double, and binary-or are 39 // all inherited from this class. The various identity values are supplied 40 // by virtual functions. 41 class AddNode : public Node { 42 virtual uint hash() const; 43 public: 44 AddNode( Node *in1, Node *in2 ) : Node(0,in1,in2) { 45 init_class_id(Class_Add); 46 } 47 48 // Handle algebraic identities here. If we have an identity, return the Node 49 // we are equivalent to. We look for "add of zero" as an identity. 50 virtual Node* Identity(PhaseGVN* phase); 51 52 // We also canonicalize the Node, moving constants to the right input, 53 // and flatten expressions (so that 1+x+2 becomes x+3). 54 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 55 56 // Compute a new Type for this node. Basically we just do the pre-check, 57 // then call the virtual add() to set the type. 58 virtual const Type* Value(PhaseGVN* phase) const; 59 60 // Check if this addition involves the additive identity 61 virtual const Type *add_of_identity( const Type *t1, const Type *t2 ) const; 62 63 // Supplied function returns the sum of the inputs. 64 // This also type-checks the inputs for sanity. Guaranteed never to 65 // be passed a TOP or BOTTOM type, these are filtered out by a pre-check. 66 virtual const Type *add_ring( const Type *, const Type * ) const = 0; 67 68 // Supplied function to return the additive identity type 69 virtual const Type *add_id() const = 0; 70 71 }; 72 73 //------------------------------AddINode--------------------------------------- 74 // Add 2 integers 75 class AddINode : public AddNode { 76 public: 77 AddINode( Node *in1, Node *in2 ) : AddNode(in1,in2) {} 78 virtual int Opcode() const; 79 virtual const Type *add_ring( const Type *, const Type * ) const; 80 virtual const Type *add_id() const { return TypeInt::ZERO; } 81 virtual const Type *bottom_type() const { return TypeInt::INT; } 82 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 83 virtual Node* Identity(PhaseGVN* phase); 84 virtual uint ideal_reg() const { return Op_RegI; } 85 }; 86 87 //------------------------------AddLNode--------------------------------------- 88 // Add 2 longs 89 class AddLNode : public AddNode { 90 public: 91 AddLNode( Node *in1, Node *in2 ) : AddNode(in1,in2) {} 92 virtual int Opcode() const; 93 virtual const Type *add_ring( const Type *, const Type * ) const; 94 virtual const Type *add_id() const { return TypeLong::ZERO; } 95 virtual const Type *bottom_type() const { return TypeLong::LONG; } 96 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 97 virtual Node* Identity(PhaseGVN* phase); 98 virtual uint ideal_reg() const { return Op_RegL; } 99 }; 100 101 //------------------------------AddFNode--------------------------------------- 102 // Add 2 floats 103 class AddFNode : public AddNode { 104 public: 105 AddFNode( Node *in1, Node *in2 ) : AddNode(in1,in2) {} 106 virtual int Opcode() const; 107 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 108 virtual const Type *add_of_identity( const Type *t1, const Type *t2 ) const; 109 virtual const Type *add_ring( const Type *, const Type * ) const; 110 virtual const Type *add_id() const { return TypeF::ZERO; } 111 virtual const Type *bottom_type() const { return Type::FLOAT; } 112 virtual Node* Identity(PhaseGVN* phase) { return this; } 113 virtual uint ideal_reg() const { return Op_RegF; } 114 }; 115 116 //------------------------------AddDNode--------------------------------------- 117 // Add 2 doubles 118 class AddDNode : public AddNode { 119 public: 120 AddDNode( Node *in1, Node *in2 ) : AddNode(in1,in2) {} 121 virtual int Opcode() const; 122 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 123 virtual const Type *add_of_identity( const Type *t1, const Type *t2 ) const; 124 virtual const Type *add_ring( const Type *, const Type * ) const; 125 virtual const Type *add_id() const { return TypeD::ZERO; } 126 virtual const Type *bottom_type() const { return Type::DOUBLE; } 127 virtual Node* Identity(PhaseGVN* phase) { return this; } 128 virtual uint ideal_reg() const { return Op_RegD; } 129 }; 130 131 //------------------------------AddPNode--------------------------------------- 132 // Add pointer plus integer to get pointer. NOT commutative, really. 133 // So not really an AddNode. Lives here, because people associate it with 134 // an add. 135 class AddPNode : public Node { 136 public: 137 enum { Control, // When is it safe to do this add? 138 Base, // Base oop, for GC purposes 139 Address, // Actually address, derived from base 140 Offset } ; // Offset added to address 141 AddPNode( Node *base, Node *ptr, Node *off ) : Node(0,base,ptr,off) { 142 init_class_id(Class_AddP); 143 } 144 virtual int Opcode() const; 145 virtual Node* Identity(PhaseGVN* phase); 146 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 147 virtual const Type* Value(PhaseGVN* phase) const; 148 virtual const Type *bottom_type() const; 149 virtual uint ideal_reg() const { return Op_RegP; } 150 Node *base_node() { assert( req() > Base, "Missing base"); return in(Base); } 151 static Node* Ideal_base_and_offset(Node* ptr, PhaseTransform* phase, 152 // second return value: 153 intptr_t& offset); 154 155 // Collect the AddP offset values into the elements array, giving up 156 // if there are more than length. 157 int unpack_offsets(Node* elements[], int length); 158 159 // Do not match base-ptr edge 160 virtual uint match_edge(uint idx) const; 161 }; 162 163 //------------------------------OrINode---------------------------------------- 164 // Logically OR 2 integers. Included with the ADD nodes because it inherits 165 // all the behavior of addition on a ring. 166 class OrINode : public AddNode { 167 public: 168 OrINode( Node *in1, Node *in2 ) : AddNode(in1,in2) {} 169 virtual int Opcode() const; 170 virtual const Type *add_ring( const Type *, const Type * ) const; 171 virtual const Type *add_id() const { return TypeInt::ZERO; } 172 virtual const Type *bottom_type() const { return TypeInt::INT; } 173 virtual Node* Identity(PhaseGVN* phase); 174 virtual uint ideal_reg() const { return Op_RegI; } 175 }; 176 177 //------------------------------OrLNode---------------------------------------- 178 // Logically OR 2 longs. Included with the ADD nodes because it inherits 179 // all the behavior of addition on a ring. 180 class OrLNode : public AddNode { 181 public: 182 OrLNode( Node *in1, Node *in2 ) : AddNode(in1,in2) {} 183 virtual int Opcode() const; 184 virtual const Type *add_ring( const Type *, const Type * ) const; 185 virtual const Type *add_id() const { return TypeLong::ZERO; } 186 virtual const Type *bottom_type() const { return TypeLong::LONG; } 187 virtual Node* Identity(PhaseGVN* phase); 188 virtual uint ideal_reg() const { return Op_RegL; } 189 }; 190 191 //------------------------------XorINode--------------------------------------- 192 // XOR'ing 2 integers 193 class XorINode : public AddNode { 194 public: 195 XorINode( Node *in1, Node *in2 ) : AddNode(in1,in2) {} 196 virtual int Opcode() const; 197 virtual const Type *add_ring( const Type *, const Type * ) const; 198 virtual const Type *add_id() const { return TypeInt::ZERO; } 199 virtual const Type *bottom_type() const { return TypeInt::INT; } 200 virtual uint ideal_reg() const { return Op_RegI; } 201 }; 202 203 //------------------------------XorINode--------------------------------------- 204 // XOR'ing 2 longs 205 class XorLNode : public AddNode { 206 public: 207 XorLNode( Node *in1, Node *in2 ) : AddNode(in1,in2) {} 208 virtual int Opcode() const; 209 virtual const Type *add_ring( const Type *, const Type * ) const; 210 virtual const Type *add_id() const { return TypeLong::ZERO; } 211 virtual const Type *bottom_type() const { return TypeLong::LONG; } 212 virtual uint ideal_reg() const { return Op_RegL; } 213 }; 214 215 //------------------------------MaxNode---------------------------------------- 216 // Max (or min) of 2 values. Included with the ADD nodes because it inherits 217 // all the behavior of addition on a ring. Only new thing is that we allow 218 // 2 equal inputs to be equal. 219 class MaxNode : public AddNode { 220 private: 221 static Node* build_min_max(Node* a, Node* b, bool is_max, bool is_unsigned, const Type* t, PhaseGVN& gvn); 222 static Node* build_min_max_diff_with_zero(Node* a, Node* b, bool is_max, const Type* t, PhaseGVN& gvn); 223 224 public: 225 MaxNode( Node *in1, Node *in2 ) : AddNode(in1,in2) {} 226 virtual int Opcode() const = 0; 227 228 static Node* unsigned_max(Node* a, Node* b, const Type* t, PhaseGVN& gvn) { 229 return build_min_max(a, b, true, true, t, gvn); 230 } 231 232 static Node* unsigned_min(Node* a, Node* b, const Type* t, PhaseGVN& gvn) { 233 return build_min_max(a, b, false, true, t, gvn); 234 } 235 236 static Node* signed_max(Node* a, Node* b, const Type* t, PhaseGVN& gvn) { 237 return build_min_max(a, b, true, false, t, gvn); 238 } 239 240 static Node* signed_min(Node* a, Node* b, const Type* t, PhaseGVN& gvn) { 241 return build_min_max(a, b, false, false, t, gvn); 242 } 243 244 // max(a-b, 0) 245 static Node* max_diff_with_zero(Node* a, Node* b, const Type* t, PhaseGVN& gvn) { 246 return build_min_max_diff_with_zero(a, b, true, t, gvn); 247 } 248 249 // min(a-b, 0) 250 static Node* min_diff_with_zero(Node* a, Node* b, const Type* t, PhaseGVN& gvn) { 251 return build_min_max_diff_with_zero(a, b, false, t, gvn); 252 } 253 }; 254 255 //------------------------------MaxINode--------------------------------------- 256 // Maximum of 2 integers. Included with the ADD nodes because it inherits 257 // all the behavior of addition on a ring. 258 class MaxINode : public MaxNode { 259 public: 260 MaxINode( Node *in1, Node *in2 ) : MaxNode(in1,in2) {} 261 virtual int Opcode() const; 262 virtual const Type *add_ring( const Type *, const Type * ) const; 263 virtual const Type *add_id() const { return TypeInt::make(min_jint); } 264 virtual const Type *bottom_type() const { return TypeInt::INT; } 265 virtual uint ideal_reg() const { return Op_RegI; } 266 }; 267 268 //------------------------------MinINode--------------------------------------- 269 // MINimum of 2 integers. Included with the ADD nodes because it inherits 270 // all the behavior of addition on a ring. 271 class MinINode : public MaxNode { 272 public: 273 MinINode( Node *in1, Node *in2 ) : MaxNode(in1,in2) {} 274 virtual int Opcode() const; 275 virtual const Type *add_ring( const Type *, const Type * ) const; 276 virtual const Type *add_id() const { return TypeInt::make(max_jint); } 277 virtual const Type *bottom_type() const { return TypeInt::INT; } 278 virtual uint ideal_reg() const { return Op_RegI; } 279 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); 280 }; 281 282 //------------------------------MaxLNode--------------------------------------- 283 // MAXimum of 2 longs. 284 class MaxLNode : public MaxNode { 285 public: 286 MaxLNode(Node *in1, Node *in2) : MaxNode(in1, in2) {} 287 virtual int Opcode() const; 288 virtual const Type *add_ring(const Type*, const Type*) const { return TypeLong::LONG; } 289 virtual const Type *add_id() const { return TypeLong::make(min_jlong); } 290 virtual const Type *bottom_type() const { return TypeLong::LONG; } 291 virtual uint ideal_reg() const { return Op_RegL; } 292 }; 293 294 //------------------------------MinLNode--------------------------------------- 295 // MINimum of 2 longs. 296 class MinLNode : public MaxNode { 297 public: 298 MinLNode(Node *in1, Node *in2) : MaxNode(in1, in2) {} 299 virtual int Opcode() const; 300 virtual const Type *add_ring(const Type*, const Type*) const { return TypeLong::LONG; } 301 virtual const Type *add_id() const { return TypeLong::make(max_jlong); } 302 virtual const Type *bottom_type() const { return TypeLong::LONG; } 303 virtual uint ideal_reg() const { return Op_RegL; } 304 }; 305 306 //------------------------------MaxFNode--------------------------------------- 307 // Maximum of 2 floats. 308 class MaxFNode : public MaxNode { 309 public: 310 MaxFNode(Node *in1, Node *in2) : MaxNode(in1, in2) {} 311 virtual int Opcode() const; 312 virtual const Type *add_ring(const Type*, const Type*) const; 313 virtual const Type *add_id() const { return TypeF::NEG_INF; } 314 virtual const Type *bottom_type() const { return Type::FLOAT; } 315 virtual uint ideal_reg() const { return Op_RegF; } 316 }; 317 318 //------------------------------MinFNode--------------------------------------- 319 // Minimum of 2 floats. 320 class MinFNode : public MaxNode { 321 public: 322 MinFNode(Node *in1, Node *in2) : MaxNode(in1, in2) {} 323 virtual int Opcode() const; 324 virtual const Type *add_ring(const Type*, const Type*) const; 325 virtual const Type *add_id() const { return TypeF::POS_INF; } 326 virtual const Type *bottom_type() const { return Type::FLOAT; } 327 virtual uint ideal_reg() const { return Op_RegF; } 328 }; 329 330 //------------------------------MaxDNode--------------------------------------- 331 // Maximum of 2 doubles. 332 class MaxDNode : public MaxNode { 333 public: 334 MaxDNode(Node *in1, Node *in2) : MaxNode(in1, in2) {} 335 virtual int Opcode() const; 336 virtual const Type *add_ring(const Type*, const Type*) const; 337 virtual const Type *add_id() const { return TypeD::NEG_INF; } 338 virtual const Type *bottom_type() const { return Type::DOUBLE; } 339 virtual uint ideal_reg() const { return Op_RegD; } 340 }; 341 342 //------------------------------MinDNode--------------------------------------- 343 // Minimum of 2 doubles. 344 class MinDNode : public MaxNode { 345 public: 346 MinDNode(Node *in1, Node *in2) : MaxNode(in1, in2) {} 347 virtual int Opcode() const; 348 virtual const Type *add_ring(const Type*, const Type*) const; 349 virtual const Type *add_id() const { return TypeD::POS_INF; } 350 virtual const Type *bottom_type() const { return Type::DOUBLE; } 351 virtual uint ideal_reg() const { return Op_RegD; } 352 }; 353 354 #endif // SHARE_OPTO_ADDNODE_HPP