1 /* 2 * Copyright (c) 1999, 2013, 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 "classfile/systemDictionary.hpp" 27 #include "classfile/vmSymbols.hpp" 28 #include "compiler/compileBroker.hpp" 29 #include "compiler/compileLog.hpp" 30 #include "oops/objArrayKlass.hpp" 31 #include "opto/addnode.hpp" 32 #include "opto/callGenerator.hpp" 33 #include "opto/cfgnode.hpp" 34 #include "opto/idealKit.hpp" 35 #include "opto/mathexactnode.hpp" 36 #include "opto/mulnode.hpp" 37 #include "opto/parse.hpp" 38 #include "opto/runtime.hpp" 39 #include "opto/subnode.hpp" 40 #include "prims/nativeLookup.hpp" 41 #include "runtime/sharedRuntime.hpp" 42 #include "trace/traceMacros.hpp" 43 44 class LibraryIntrinsic : public InlineCallGenerator { 45 // Extend the set of intrinsics known to the runtime: 46 public: 47 private: 48 bool _is_virtual; 49 bool _is_predicted; 50 bool _does_virtual_dispatch; 51 vmIntrinsics::ID _intrinsic_id; 52 53 public: 54 LibraryIntrinsic(ciMethod* m, bool is_virtual, bool is_predicted, bool does_virtual_dispatch, vmIntrinsics::ID id) 55 : InlineCallGenerator(m), 56 _is_virtual(is_virtual), 57 _is_predicted(is_predicted), 58 _does_virtual_dispatch(does_virtual_dispatch), 59 _intrinsic_id(id) 60 { 61 } 62 virtual bool is_intrinsic() const { return true; } 63 virtual bool is_virtual() const { return _is_virtual; } 64 virtual bool is_predicted() const { return _is_predicted; } 65 virtual bool does_virtual_dispatch() const { return _does_virtual_dispatch; } 66 virtual JVMState* generate(JVMState* jvms, Parse* parent_parser); 67 virtual Node* generate_predicate(JVMState* jvms); 68 vmIntrinsics::ID intrinsic_id() const { return _intrinsic_id; } 69 }; 70 71 72 // Local helper class for LibraryIntrinsic: 73 class LibraryCallKit : public GraphKit { 74 private: 75 LibraryIntrinsic* _intrinsic; // the library intrinsic being called 76 Node* _result; // the result node, if any 77 int _reexecute_sp; // the stack pointer when bytecode needs to be reexecuted 78 79 const TypeOopPtr* sharpen_unsafe_type(Compile::AliasType* alias_type, const TypePtr *adr_type, bool is_native_ptr = false); 80 81 public: 82 LibraryCallKit(JVMState* jvms, LibraryIntrinsic* intrinsic) 83 : GraphKit(jvms), 84 _intrinsic(intrinsic), 85 _result(NULL) 86 { 87 // Check if this is a root compile. In that case we don't have a caller. 88 if (!jvms->has_method()) { 89 _reexecute_sp = sp(); 90 } else { 91 // Find out how many arguments the interpreter needs when deoptimizing 92 // and save the stack pointer value so it can used by uncommon_trap. 93 // We find the argument count by looking at the declared signature. 94 bool ignored_will_link; 95 ciSignature* declared_signature = NULL; 96 ciMethod* ignored_callee = caller()->get_method_at_bci(bci(), ignored_will_link, &declared_signature); 97 const int nargs = declared_signature->arg_size_for_bc(caller()->java_code_at_bci(bci())); 98 _reexecute_sp = sp() + nargs; // "push" arguments back on stack 99 } 100 } 101 102 virtual LibraryCallKit* is_LibraryCallKit() const { return (LibraryCallKit*)this; } 103 104 ciMethod* caller() const { return jvms()->method(); } 105 int bci() const { return jvms()->bci(); } 106 LibraryIntrinsic* intrinsic() const { return _intrinsic; } 107 vmIntrinsics::ID intrinsic_id() const { return _intrinsic->intrinsic_id(); } 108 ciMethod* callee() const { return _intrinsic->method(); } 109 110 bool try_to_inline(); 111 Node* try_to_predicate(); 112 113 void push_result() { 114 // Push the result onto the stack. 115 if (!stopped() && result() != NULL) { 116 BasicType bt = result()->bottom_type()->basic_type(); 117 push_node(bt, result()); 118 } 119 } 120 121 private: 122 void fatal_unexpected_iid(vmIntrinsics::ID iid) { 123 fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); 124 } 125 126 void set_result(Node* n) { assert(_result == NULL, "only set once"); _result = n; } 127 void set_result(RegionNode* region, PhiNode* value); 128 Node* result() { return _result; } 129 130 virtual int reexecute_sp() { return _reexecute_sp; } 131 132 // Helper functions to inline natives 133 Node* generate_guard(Node* test, RegionNode* region, float true_prob); 134 Node* generate_slow_guard(Node* test, RegionNode* region); 135 Node* generate_fair_guard(Node* test, RegionNode* region); 136 Node* generate_negative_guard(Node* index, RegionNode* region, 137 // resulting CastII of index: 138 Node* *pos_index = NULL); 139 Node* generate_nonpositive_guard(Node* index, bool never_negative, 140 // resulting CastII of index: 141 Node* *pos_index = NULL); 142 Node* generate_limit_guard(Node* offset, Node* subseq_length, 143 Node* array_length, 144 RegionNode* region); 145 Node* generate_current_thread(Node* &tls_output); 146 address basictype2arraycopy(BasicType t, Node *src_offset, Node *dest_offset, 147 bool disjoint_bases, const char* &name, bool dest_uninitialized); 148 Node* load_mirror_from_klass(Node* klass); 149 Node* load_klass_from_mirror_common(Node* mirror, bool never_see_null, 150 RegionNode* region, int null_path, 151 int offset); 152 Node* load_klass_from_mirror(Node* mirror, bool never_see_null, 153 RegionNode* region, int null_path) { 154 int offset = java_lang_Class::klass_offset_in_bytes(); 155 return load_klass_from_mirror_common(mirror, never_see_null, 156 region, null_path, 157 offset); 158 } 159 Node* load_array_klass_from_mirror(Node* mirror, bool never_see_null, 160 RegionNode* region, int null_path) { 161 int offset = java_lang_Class::array_klass_offset_in_bytes(); 162 return load_klass_from_mirror_common(mirror, never_see_null, 163 region, null_path, 164 offset); 165 } 166 Node* generate_access_flags_guard(Node* kls, 167 int modifier_mask, int modifier_bits, 168 RegionNode* region); 169 Node* generate_interface_guard(Node* kls, RegionNode* region); 170 Node* generate_array_guard(Node* kls, RegionNode* region) { 171 return generate_array_guard_common(kls, region, false, false); 172 } 173 Node* generate_non_array_guard(Node* kls, RegionNode* region) { 174 return generate_array_guard_common(kls, region, false, true); 175 } 176 Node* generate_objArray_guard(Node* kls, RegionNode* region) { 177 return generate_array_guard_common(kls, region, true, false); 178 } 179 Node* generate_non_objArray_guard(Node* kls, RegionNode* region) { 180 return generate_array_guard_common(kls, region, true, true); 181 } 182 Node* generate_array_guard_common(Node* kls, RegionNode* region, 183 bool obj_array, bool not_array); 184 Node* generate_virtual_guard(Node* obj_klass, RegionNode* slow_region); 185 CallJavaNode* generate_method_call(vmIntrinsics::ID method_id, 186 bool is_virtual = false, bool is_static = false); 187 CallJavaNode* generate_method_call_static(vmIntrinsics::ID method_id) { 188 return generate_method_call(method_id, false, true); 189 } 190 CallJavaNode* generate_method_call_virtual(vmIntrinsics::ID method_id) { 191 return generate_method_call(method_id, true, false); 192 } 193 Node * load_field_from_object(Node * fromObj, const char * fieldName, const char * fieldTypeString, bool is_exact, bool is_static); 194 195 Node* make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2); 196 Node* make_string_method_node(int opcode, Node* str1, Node* str2); 197 bool inline_string_compareTo(); 198 bool inline_string_indexOf(); 199 Node* string_indexOf(Node* string_object, ciTypeArray* target_array, jint offset, jint cache_i, jint md2_i); 200 bool inline_string_equals(); 201 Node* round_double_node(Node* n); 202 bool runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName); 203 bool inline_math_native(vmIntrinsics::ID id); 204 bool inline_trig(vmIntrinsics::ID id); 205 bool inline_math(vmIntrinsics::ID id); 206 void inline_math_mathExact(Node* math); 207 bool inline_math_addExactI(bool is_increment); 208 bool inline_math_addExactL(bool is_increment); 209 bool inline_math_multiplyExactI(); 210 bool inline_math_multiplyExactL(); 211 bool inline_math_negateExactI(); 212 bool inline_math_negateExactL(); 213 bool inline_math_subtractExactI(bool is_decrement); 214 bool inline_math_subtractExactL(bool is_decrement); 215 bool inline_exp(); 216 bool inline_pow(); 217 void finish_pow_exp(Node* result, Node* x, Node* y, const TypeFunc* call_type, address funcAddr, const char* funcName); 218 bool inline_min_max(vmIntrinsics::ID id); 219 Node* generate_min_max(vmIntrinsics::ID id, Node* x, Node* y); 220 // This returns Type::AnyPtr, RawPtr, or OopPtr. 221 int classify_unsafe_addr(Node* &base, Node* &offset); 222 Node* make_unsafe_address(Node* base, Node* offset); 223 // Helper for inline_unsafe_access. 224 // Generates the guards that check whether the result of 225 // Unsafe.getObject should be recorded in an SATB log buffer. 226 void insert_pre_barrier(Node* base_oop, Node* offset, Node* pre_val, bool need_mem_bar); 227 bool inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile); 228 bool inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static); 229 static bool klass_needs_init_guard(Node* kls); 230 bool inline_unsafe_allocate(); 231 bool inline_unsafe_copyMemory(); 232 bool inline_native_currentThread(); 233 #ifdef TRACE_HAVE_INTRINSICS 234 bool inline_native_classID(); 235 bool inline_native_threadID(); 236 #endif 237 bool inline_native_time_funcs(address method, const char* funcName); 238 bool inline_native_isInterrupted(); 239 bool inline_native_Class_query(vmIntrinsics::ID id); 240 bool inline_native_subtype_check(); 241 242 bool inline_native_newArray(); 243 bool inline_native_getLength(); 244 bool inline_array_copyOf(bool is_copyOfRange); 245 bool inline_array_equals(); 246 void copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array, bool card_mark); 247 bool inline_native_clone(bool is_virtual); 248 bool inline_native_Reflection_getCallerClass(); 249 // Helper function for inlining native object hash method 250 bool inline_native_hashcode(bool is_virtual, bool is_static); 251 bool inline_native_getClass(); 252 253 // Helper functions for inlining arraycopy 254 bool inline_arraycopy(); 255 void generate_arraycopy(const TypePtr* adr_type, 256 BasicType basic_elem_type, 257 Node* src, Node* src_offset, 258 Node* dest, Node* dest_offset, 259 Node* copy_length, 260 bool disjoint_bases = false, 261 bool length_never_negative = false, 262 RegionNode* slow_region = NULL); 263 AllocateArrayNode* tightly_coupled_allocation(Node* ptr, 264 RegionNode* slow_region); 265 void generate_clear_array(const TypePtr* adr_type, 266 Node* dest, 267 BasicType basic_elem_type, 268 Node* slice_off, 269 Node* slice_len, 270 Node* slice_end); 271 bool generate_block_arraycopy(const TypePtr* adr_type, 272 BasicType basic_elem_type, 273 AllocateNode* alloc, 274 Node* src, Node* src_offset, 275 Node* dest, Node* dest_offset, 276 Node* dest_size, bool dest_uninitialized); 277 void generate_slow_arraycopy(const TypePtr* adr_type, 278 Node* src, Node* src_offset, 279 Node* dest, Node* dest_offset, 280 Node* copy_length, bool dest_uninitialized); 281 Node* generate_checkcast_arraycopy(const TypePtr* adr_type, 282 Node* dest_elem_klass, 283 Node* src, Node* src_offset, 284 Node* dest, Node* dest_offset, 285 Node* copy_length, bool dest_uninitialized); 286 Node* generate_generic_arraycopy(const TypePtr* adr_type, 287 Node* src, Node* src_offset, 288 Node* dest, Node* dest_offset, 289 Node* copy_length, bool dest_uninitialized); 290 void generate_unchecked_arraycopy(const TypePtr* adr_type, 291 BasicType basic_elem_type, 292 bool disjoint_bases, 293 Node* src, Node* src_offset, 294 Node* dest, Node* dest_offset, 295 Node* copy_length, bool dest_uninitialized); 296 typedef enum { LS_xadd, LS_xchg, LS_cmpxchg } LoadStoreKind; 297 bool inline_unsafe_load_store(BasicType type, LoadStoreKind kind); 298 bool inline_unsafe_ordered_store(BasicType type); 299 bool inline_unsafe_fence(vmIntrinsics::ID id); 300 bool inline_fp_conversions(vmIntrinsics::ID id); 301 bool inline_number_methods(vmIntrinsics::ID id); 302 bool inline_reference_get(); 303 bool inline_aescrypt_Block(vmIntrinsics::ID id); 304 bool inline_cipherBlockChaining_AESCrypt(vmIntrinsics::ID id); 305 Node* inline_cipherBlockChaining_AESCrypt_predicate(bool decrypting); 306 Node* get_key_start_from_aescrypt_object(Node* aescrypt_object); 307 bool inline_encodeISOArray(); 308 bool inline_updateCRC32(); 309 bool inline_updateBytesCRC32(); 310 bool inline_updateByteBufferCRC32(); 311 }; 312 313 314 //---------------------------make_vm_intrinsic---------------------------- 315 CallGenerator* Compile::make_vm_intrinsic(ciMethod* m, bool is_virtual) { 316 vmIntrinsics::ID id = m->intrinsic_id(); 317 assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); 318 319 if (DisableIntrinsic[0] != '\0' 320 && strstr(DisableIntrinsic, vmIntrinsics::name_at(id)) != NULL) { 321 // disabled by a user request on the command line: 322 // example: -XX:DisableIntrinsic=_hashCode,_getClass 323 return NULL; 324 } 325 326 if (!m->is_loaded()) { 327 // do not attempt to inline unloaded methods 328 return NULL; 329 } 330 331 // Only a few intrinsics implement a virtual dispatch. 332 // They are expensive calls which are also frequently overridden. 333 if (is_virtual) { 334 switch (id) { 335 case vmIntrinsics::_hashCode: 336 case vmIntrinsics::_clone: 337 // OK, Object.hashCode and Object.clone intrinsics come in both flavors 338 break; 339 default: 340 return NULL; 341 } 342 } 343 344 // -XX:-InlineNatives disables nearly all intrinsics: 345 if (!InlineNatives) { 346 switch (id) { 347 case vmIntrinsics::_indexOf: 348 case vmIntrinsics::_compareTo: 349 case vmIntrinsics::_equals: 350 case vmIntrinsics::_equalsC: 351 case vmIntrinsics::_getAndAddInt: 352 case vmIntrinsics::_getAndAddLong: 353 case vmIntrinsics::_getAndSetInt: 354 case vmIntrinsics::_getAndSetLong: 355 case vmIntrinsics::_getAndSetObject: 356 case vmIntrinsics::_loadFence: 357 case vmIntrinsics::_storeFence: 358 case vmIntrinsics::_fullFence: 359 break; // InlineNatives does not control String.compareTo 360 case vmIntrinsics::_Reference_get: 361 break; // InlineNatives does not control Reference.get 362 default: 363 return NULL; 364 } 365 } 366 367 bool is_predicted = false; 368 bool does_virtual_dispatch = false; 369 370 switch (id) { 371 case vmIntrinsics::_compareTo: 372 if (!SpecialStringCompareTo) return NULL; 373 if (!Matcher::match_rule_supported(Op_StrComp)) return NULL; 374 break; 375 case vmIntrinsics::_indexOf: 376 if (!SpecialStringIndexOf) return NULL; 377 break; 378 case vmIntrinsics::_equals: 379 if (!SpecialStringEquals) return NULL; 380 if (!Matcher::match_rule_supported(Op_StrEquals)) return NULL; 381 break; 382 case vmIntrinsics::_equalsC: 383 if (!SpecialArraysEquals) return NULL; 384 if (!Matcher::match_rule_supported(Op_AryEq)) return NULL; 385 break; 386 case vmIntrinsics::_arraycopy: 387 if (!InlineArrayCopy) return NULL; 388 break; 389 case vmIntrinsics::_copyMemory: 390 if (StubRoutines::unsafe_arraycopy() == NULL) return NULL; 391 if (!InlineArrayCopy) return NULL; 392 break; 393 case vmIntrinsics::_hashCode: 394 if (!InlineObjectHash) return NULL; 395 does_virtual_dispatch = true; 396 break; 397 case vmIntrinsics::_clone: 398 does_virtual_dispatch = true; 399 case vmIntrinsics::_copyOf: 400 case vmIntrinsics::_copyOfRange: 401 if (!InlineObjectCopy) return NULL; 402 // These also use the arraycopy intrinsic mechanism: 403 if (!InlineArrayCopy) return NULL; 404 break; 405 case vmIntrinsics::_encodeISOArray: 406 if (!SpecialEncodeISOArray) return NULL; 407 if (!Matcher::match_rule_supported(Op_EncodeISOArray)) return NULL; 408 break; 409 case vmIntrinsics::_checkIndex: 410 // We do not intrinsify this. The optimizer does fine with it. 411 return NULL; 412 413 case vmIntrinsics::_getCallerClass: 414 if (!UseNewReflection) return NULL; 415 if (!InlineReflectionGetCallerClass) return NULL; 416 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) return NULL; 417 break; 418 419 case vmIntrinsics::_bitCount_i: 420 if (!Matcher::match_rule_supported(Op_PopCountI)) return NULL; 421 break; 422 423 case vmIntrinsics::_bitCount_l: 424 if (!Matcher::match_rule_supported(Op_PopCountL)) return NULL; 425 break; 426 427 case vmIntrinsics::_numberOfLeadingZeros_i: 428 if (!Matcher::match_rule_supported(Op_CountLeadingZerosI)) return NULL; 429 break; 430 431 case vmIntrinsics::_numberOfLeadingZeros_l: 432 if (!Matcher::match_rule_supported(Op_CountLeadingZerosL)) return NULL; 433 break; 434 435 case vmIntrinsics::_numberOfTrailingZeros_i: 436 if (!Matcher::match_rule_supported(Op_CountTrailingZerosI)) return NULL; 437 break; 438 439 case vmIntrinsics::_numberOfTrailingZeros_l: 440 if (!Matcher::match_rule_supported(Op_CountTrailingZerosL)) return NULL; 441 break; 442 443 case vmIntrinsics::_reverseBytes_c: 444 if (!Matcher::match_rule_supported(Op_ReverseBytesUS)) return NULL; 445 break; 446 case vmIntrinsics::_reverseBytes_s: 447 if (!Matcher::match_rule_supported(Op_ReverseBytesS)) return NULL; 448 break; 449 case vmIntrinsics::_reverseBytes_i: 450 if (!Matcher::match_rule_supported(Op_ReverseBytesI)) return NULL; 451 break; 452 case vmIntrinsics::_reverseBytes_l: 453 if (!Matcher::match_rule_supported(Op_ReverseBytesL)) return NULL; 454 break; 455 456 case vmIntrinsics::_Reference_get: 457 // Use the intrinsic version of Reference.get() so that the value in 458 // the referent field can be registered by the G1 pre-barrier code. 459 // Also add memory barrier to prevent commoning reads from this field 460 // across safepoint since GC can change it value. 461 break; 462 463 case vmIntrinsics::_compareAndSwapObject: 464 #ifdef _LP64 465 if (!UseCompressedOops && !Matcher::match_rule_supported(Op_CompareAndSwapP)) return NULL; 466 #endif 467 break; 468 469 case vmIntrinsics::_compareAndSwapLong: 470 if (!Matcher::match_rule_supported(Op_CompareAndSwapL)) return NULL; 471 break; 472 473 case vmIntrinsics::_getAndAddInt: 474 if (!Matcher::match_rule_supported(Op_GetAndAddI)) return NULL; 475 break; 476 477 case vmIntrinsics::_getAndAddLong: 478 if (!Matcher::match_rule_supported(Op_GetAndAddL)) return NULL; 479 break; 480 481 case vmIntrinsics::_getAndSetInt: 482 if (!Matcher::match_rule_supported(Op_GetAndSetI)) return NULL; 483 break; 484 485 case vmIntrinsics::_getAndSetLong: 486 if (!Matcher::match_rule_supported(Op_GetAndSetL)) return NULL; 487 break; 488 489 case vmIntrinsics::_getAndSetObject: 490 #ifdef _LP64 491 if (!UseCompressedOops && !Matcher::match_rule_supported(Op_GetAndSetP)) return NULL; 492 if (UseCompressedOops && !Matcher::match_rule_supported(Op_GetAndSetN)) return NULL; 493 break; 494 #else 495 if (!Matcher::match_rule_supported(Op_GetAndSetP)) return NULL; 496 break; 497 #endif 498 499 case vmIntrinsics::_aescrypt_encryptBlock: 500 case vmIntrinsics::_aescrypt_decryptBlock: 501 if (!UseAESIntrinsics) return NULL; 502 break; 503 504 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 505 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 506 if (!UseAESIntrinsics) return NULL; 507 // these two require the predicated logic 508 is_predicted = true; 509 break; 510 511 case vmIntrinsics::_updateCRC32: 512 case vmIntrinsics::_updateBytesCRC32: 513 case vmIntrinsics::_updateByteBufferCRC32: 514 if (!UseCRC32Intrinsics) return NULL; 515 break; 516 517 case vmIntrinsics::_incrementExactI: 518 case vmIntrinsics::_addExactI: 519 if (!Matcher::match_rule_supported(Op_AddExactI) || !UseMathExactIntrinsics) return NULL; 520 break; 521 case vmIntrinsics::_incrementExactL: 522 case vmIntrinsics::_addExactL: 523 if (!Matcher::match_rule_supported(Op_AddExactL) || !UseMathExactIntrinsics) return NULL; 524 break; 525 case vmIntrinsics::_decrementExactI: 526 case vmIntrinsics::_subtractExactI: 527 if (!Matcher::match_rule_supported(Op_SubExactI) || !UseMathExactIntrinsics) return NULL; 528 break; 529 case vmIntrinsics::_decrementExactL: 530 case vmIntrinsics::_subtractExactL: 531 if (!Matcher::match_rule_supported(Op_SubExactL) || !UseMathExactIntrinsics) return NULL; 532 break; 533 case vmIntrinsics::_negateExactI: 534 if (!Matcher::match_rule_supported(Op_NegExactI) || !UseMathExactIntrinsics) return NULL; 535 break; 536 case vmIntrinsics::_negateExactL: 537 if (!Matcher::match_rule_supported(Op_NegExactL) || !UseMathExactIntrinsics) return NULL; 538 break; 539 case vmIntrinsics::_multiplyExactI: 540 if (!Matcher::match_rule_supported(Op_MulExactI) || !UseMathExactIntrinsics) return NULL; 541 break; 542 case vmIntrinsics::_multiplyExactL: 543 if (!Matcher::match_rule_supported(Op_MulExactL) || !UseMathExactIntrinsics) return NULL; 544 break; 545 546 default: 547 assert(id <= vmIntrinsics::LAST_COMPILER_INLINE, "caller responsibility"); 548 assert(id != vmIntrinsics::_Object_init && id != vmIntrinsics::_invoke, "enum out of order?"); 549 break; 550 } 551 552 // -XX:-InlineClassNatives disables natives from the Class class. 553 // The flag applies to all reflective calls, notably Array.newArray 554 // (visible to Java programmers as Array.newInstance). 555 if (m->holder()->name() == ciSymbol::java_lang_Class() || 556 m->holder()->name() == ciSymbol::java_lang_reflect_Array()) { 557 if (!InlineClassNatives) return NULL; 558 } 559 560 // -XX:-InlineThreadNatives disables natives from the Thread class. 561 if (m->holder()->name() == ciSymbol::java_lang_Thread()) { 562 if (!InlineThreadNatives) return NULL; 563 } 564 565 // -XX:-InlineMathNatives disables natives from the Math,Float and Double classes. 566 if (m->holder()->name() == ciSymbol::java_lang_Math() || 567 m->holder()->name() == ciSymbol::java_lang_Float() || 568 m->holder()->name() == ciSymbol::java_lang_Double()) { 569 if (!InlineMathNatives) return NULL; 570 } 571 572 // -XX:-InlineUnsafeOps disables natives from the Unsafe class. 573 if (m->holder()->name() == ciSymbol::sun_misc_Unsafe()) { 574 if (!InlineUnsafeOps) return NULL; 575 } 576 577 return new LibraryIntrinsic(m, is_virtual, is_predicted, does_virtual_dispatch, (vmIntrinsics::ID) id); 578 } 579 580 //----------------------register_library_intrinsics----------------------- 581 // Initialize this file's data structures, for each Compile instance. 582 void Compile::register_library_intrinsics() { 583 // Nothing to do here. 584 } 585 586 JVMState* LibraryIntrinsic::generate(JVMState* jvms, Parse* parent_parser) { 587 LibraryCallKit kit(jvms, this); 588 Compile* C = kit.C; 589 int nodes = C->unique(); 590 #ifndef PRODUCT 591 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) { 592 char buf[1000]; 593 const char* str = vmIntrinsics::short_name_as_C_string(intrinsic_id(), buf, sizeof(buf)); 594 tty->print_cr("Intrinsic %s", str); 595 } 596 #endif 597 ciMethod* callee = kit.callee(); 598 const int bci = kit.bci(); 599 600 // Try to inline the intrinsic. 601 if (kit.try_to_inline()) { 602 if (C->print_intrinsics() || C->print_inlining()) { 603 C->print_inlining(callee, jvms->depth() - 1, bci, is_virtual() ? "(intrinsic, virtual)" : "(intrinsic)"); 604 } 605 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_worked); 606 if (C->log()) { 607 C->log()->elem("intrinsic id='%s'%s nodes='%d'", 608 vmIntrinsics::name_at(intrinsic_id()), 609 (is_virtual() ? " virtual='1'" : ""), 610 C->unique() - nodes); 611 } 612 // Push the result from the inlined method onto the stack. 613 kit.push_result(); 614 return kit.transfer_exceptions_into_jvms(); 615 } 616 617 // The intrinsic bailed out 618 if (C->print_intrinsics() || C->print_inlining()) { 619 if (jvms->has_method()) { 620 // Not a root compile. 621 const char* msg = is_virtual() ? "failed to inline (intrinsic, virtual)" : "failed to inline (intrinsic)"; 622 C->print_inlining(callee, jvms->depth() - 1, bci, msg); 623 } else { 624 // Root compile 625 tty->print("Did not generate intrinsic %s%s at bci:%d in", 626 vmIntrinsics::name_at(intrinsic_id()), 627 (is_virtual() ? " (virtual)" : ""), bci); 628 } 629 } 630 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_failed); 631 return NULL; 632 } 633 634 Node* LibraryIntrinsic::generate_predicate(JVMState* jvms) { 635 LibraryCallKit kit(jvms, this); 636 Compile* C = kit.C; 637 int nodes = C->unique(); 638 #ifndef PRODUCT 639 assert(is_predicted(), "sanity"); 640 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) { 641 char buf[1000]; 642 const char* str = vmIntrinsics::short_name_as_C_string(intrinsic_id(), buf, sizeof(buf)); 643 tty->print_cr("Predicate for intrinsic %s", str); 644 } 645 #endif 646 ciMethod* callee = kit.callee(); 647 const int bci = kit.bci(); 648 649 Node* slow_ctl = kit.try_to_predicate(); 650 if (!kit.failing()) { 651 if (C->print_intrinsics() || C->print_inlining()) { 652 C->print_inlining(callee, jvms->depth() - 1, bci, is_virtual() ? "(intrinsic, virtual)" : "(intrinsic)"); 653 } 654 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_worked); 655 if (C->log()) { 656 C->log()->elem("predicate_intrinsic id='%s'%s nodes='%d'", 657 vmIntrinsics::name_at(intrinsic_id()), 658 (is_virtual() ? " virtual='1'" : ""), 659 C->unique() - nodes); 660 } 661 return slow_ctl; // Could be NULL if the check folds. 662 } 663 664 // The intrinsic bailed out 665 if (C->print_intrinsics() || C->print_inlining()) { 666 if (jvms->has_method()) { 667 // Not a root compile. 668 const char* msg = "failed to generate predicate for intrinsic"; 669 C->print_inlining(kit.callee(), jvms->depth() - 1, bci, msg); 670 } else { 671 // Root compile 672 C->print_inlining_stream()->print("Did not generate predicate for intrinsic %s%s at bci:%d in", 673 vmIntrinsics::name_at(intrinsic_id()), 674 (is_virtual() ? " (virtual)" : ""), bci); 675 } 676 } 677 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_failed); 678 return NULL; 679 } 680 681 bool LibraryCallKit::try_to_inline() { 682 // Handle symbolic names for otherwise undistinguished boolean switches: 683 const bool is_store = true; 684 const bool is_native_ptr = true; 685 const bool is_static = true; 686 const bool is_volatile = true; 687 688 if (!jvms()->has_method()) { 689 // Root JVMState has a null method. 690 assert(map()->memory()->Opcode() == Op_Parm, ""); 691 // Insert the memory aliasing node 692 set_all_memory(reset_memory()); 693 } 694 assert(merged_memory(), ""); 695 696 697 switch (intrinsic_id()) { 698 case vmIntrinsics::_hashCode: return inline_native_hashcode(intrinsic()->is_virtual(), !is_static); 699 case vmIntrinsics::_identityHashCode: return inline_native_hashcode(/*!virtual*/ false, is_static); 700 case vmIntrinsics::_getClass: return inline_native_getClass(); 701 702 case vmIntrinsics::_dsin: 703 case vmIntrinsics::_dcos: 704 case vmIntrinsics::_dtan: 705 case vmIntrinsics::_dabs: 706 case vmIntrinsics::_datan2: 707 case vmIntrinsics::_dsqrt: 708 case vmIntrinsics::_dexp: 709 case vmIntrinsics::_dlog: 710 case vmIntrinsics::_dlog10: 711 case vmIntrinsics::_dpow: return inline_math_native(intrinsic_id()); 712 713 case vmIntrinsics::_min: 714 case vmIntrinsics::_max: return inline_min_max(intrinsic_id()); 715 716 case vmIntrinsics::_addExactI: return inline_math_addExactI(false /* add */); 717 case vmIntrinsics::_addExactL: return inline_math_addExactL(false /* add */); 718 case vmIntrinsics::_decrementExactI: return inline_math_subtractExactI(true /* decrement */); 719 case vmIntrinsics::_decrementExactL: return inline_math_subtractExactL(true /* decrement */); 720 case vmIntrinsics::_incrementExactI: return inline_math_addExactI(true /* increment */); 721 case vmIntrinsics::_incrementExactL: return inline_math_addExactL(true /* increment */); 722 case vmIntrinsics::_multiplyExactI: return inline_math_multiplyExactI(); 723 case vmIntrinsics::_multiplyExactL: return inline_math_multiplyExactL(); 724 case vmIntrinsics::_negateExactI: return inline_math_negateExactI(); 725 case vmIntrinsics::_negateExactL: return inline_math_negateExactL(); 726 case vmIntrinsics::_subtractExactI: return inline_math_subtractExactI(false /* subtract */); 727 case vmIntrinsics::_subtractExactL: return inline_math_subtractExactL(false /* subtract */); 728 729 case vmIntrinsics::_arraycopy: return inline_arraycopy(); 730 731 case vmIntrinsics::_compareTo: return inline_string_compareTo(); 732 case vmIntrinsics::_indexOf: return inline_string_indexOf(); 733 case vmIntrinsics::_equals: return inline_string_equals(); 734 735 case vmIntrinsics::_getObject: return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, !is_volatile); 736 case vmIntrinsics::_getBoolean: return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, !is_volatile); 737 case vmIntrinsics::_getByte: return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, !is_volatile); 738 case vmIntrinsics::_getShort: return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, !is_volatile); 739 case vmIntrinsics::_getChar: return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, !is_volatile); 740 case vmIntrinsics::_getInt: return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, !is_volatile); 741 case vmIntrinsics::_getLong: return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, !is_volatile); 742 case vmIntrinsics::_getFloat: return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, !is_volatile); 743 case vmIntrinsics::_getDouble: return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, !is_volatile); 744 745 case vmIntrinsics::_putObject: return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, !is_volatile); 746 case vmIntrinsics::_putBoolean: return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, !is_volatile); 747 case vmIntrinsics::_putByte: return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, !is_volatile); 748 case vmIntrinsics::_putShort: return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, !is_volatile); 749 case vmIntrinsics::_putChar: return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, !is_volatile); 750 case vmIntrinsics::_putInt: return inline_unsafe_access(!is_native_ptr, is_store, T_INT, !is_volatile); 751 case vmIntrinsics::_putLong: return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, !is_volatile); 752 case vmIntrinsics::_putFloat: return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, !is_volatile); 753 case vmIntrinsics::_putDouble: return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, !is_volatile); 754 755 case vmIntrinsics::_getByte_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_BYTE, !is_volatile); 756 case vmIntrinsics::_getShort_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_SHORT, !is_volatile); 757 case vmIntrinsics::_getChar_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_CHAR, !is_volatile); 758 case vmIntrinsics::_getInt_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_INT, !is_volatile); 759 case vmIntrinsics::_getLong_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_LONG, !is_volatile); 760 case vmIntrinsics::_getFloat_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_FLOAT, !is_volatile); 761 case vmIntrinsics::_getDouble_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_DOUBLE, !is_volatile); 762 case vmIntrinsics::_getAddress_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_ADDRESS, !is_volatile); 763 764 case vmIntrinsics::_putByte_raw: return inline_unsafe_access( is_native_ptr, is_store, T_BYTE, !is_volatile); 765 case vmIntrinsics::_putShort_raw: return inline_unsafe_access( is_native_ptr, is_store, T_SHORT, !is_volatile); 766 case vmIntrinsics::_putChar_raw: return inline_unsafe_access( is_native_ptr, is_store, T_CHAR, !is_volatile); 767 case vmIntrinsics::_putInt_raw: return inline_unsafe_access( is_native_ptr, is_store, T_INT, !is_volatile); 768 case vmIntrinsics::_putLong_raw: return inline_unsafe_access( is_native_ptr, is_store, T_LONG, !is_volatile); 769 case vmIntrinsics::_putFloat_raw: return inline_unsafe_access( is_native_ptr, is_store, T_FLOAT, !is_volatile); 770 case vmIntrinsics::_putDouble_raw: return inline_unsafe_access( is_native_ptr, is_store, T_DOUBLE, !is_volatile); 771 case vmIntrinsics::_putAddress_raw: return inline_unsafe_access( is_native_ptr, is_store, T_ADDRESS, !is_volatile); 772 773 case vmIntrinsics::_getObjectVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, is_volatile); 774 case vmIntrinsics::_getBooleanVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, is_volatile); 775 case vmIntrinsics::_getByteVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, is_volatile); 776 case vmIntrinsics::_getShortVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, is_volatile); 777 case vmIntrinsics::_getCharVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, is_volatile); 778 case vmIntrinsics::_getIntVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, is_volatile); 779 case vmIntrinsics::_getLongVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, is_volatile); 780 case vmIntrinsics::_getFloatVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, is_volatile); 781 case vmIntrinsics::_getDoubleVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, is_volatile); 782 783 case vmIntrinsics::_putObjectVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, is_volatile); 784 case vmIntrinsics::_putBooleanVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, is_volatile); 785 case vmIntrinsics::_putByteVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, is_volatile); 786 case vmIntrinsics::_putShortVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, is_volatile); 787 case vmIntrinsics::_putCharVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, is_volatile); 788 case vmIntrinsics::_putIntVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_INT, is_volatile); 789 case vmIntrinsics::_putLongVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, is_volatile); 790 case vmIntrinsics::_putFloatVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, is_volatile); 791 case vmIntrinsics::_putDoubleVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, is_volatile); 792 793 case vmIntrinsics::_prefetchRead: return inline_unsafe_prefetch(!is_native_ptr, !is_store, !is_static); 794 case vmIntrinsics::_prefetchWrite: return inline_unsafe_prefetch(!is_native_ptr, is_store, !is_static); 795 case vmIntrinsics::_prefetchReadStatic: return inline_unsafe_prefetch(!is_native_ptr, !is_store, is_static); 796 case vmIntrinsics::_prefetchWriteStatic: return inline_unsafe_prefetch(!is_native_ptr, is_store, is_static); 797 798 case vmIntrinsics::_compareAndSwapObject: return inline_unsafe_load_store(T_OBJECT, LS_cmpxchg); 799 case vmIntrinsics::_compareAndSwapInt: return inline_unsafe_load_store(T_INT, LS_cmpxchg); 800 case vmIntrinsics::_compareAndSwapLong: return inline_unsafe_load_store(T_LONG, LS_cmpxchg); 801 802 case vmIntrinsics::_putOrderedObject: return inline_unsafe_ordered_store(T_OBJECT); 803 case vmIntrinsics::_putOrderedInt: return inline_unsafe_ordered_store(T_INT); 804 case vmIntrinsics::_putOrderedLong: return inline_unsafe_ordered_store(T_LONG); 805 806 case vmIntrinsics::_getAndAddInt: return inline_unsafe_load_store(T_INT, LS_xadd); 807 case vmIntrinsics::_getAndAddLong: return inline_unsafe_load_store(T_LONG, LS_xadd); 808 case vmIntrinsics::_getAndSetInt: return inline_unsafe_load_store(T_INT, LS_xchg); 809 case vmIntrinsics::_getAndSetLong: return inline_unsafe_load_store(T_LONG, LS_xchg); 810 case vmIntrinsics::_getAndSetObject: return inline_unsafe_load_store(T_OBJECT, LS_xchg); 811 812 case vmIntrinsics::_loadFence: 813 case vmIntrinsics::_storeFence: 814 case vmIntrinsics::_fullFence: return inline_unsafe_fence(intrinsic_id()); 815 816 case vmIntrinsics::_currentThread: return inline_native_currentThread(); 817 case vmIntrinsics::_isInterrupted: return inline_native_isInterrupted(); 818 819 #ifdef TRACE_HAVE_INTRINSICS 820 case vmIntrinsics::_classID: return inline_native_classID(); 821 case vmIntrinsics::_threadID: return inline_native_threadID(); 822 case vmIntrinsics::_counterTime: return inline_native_time_funcs(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), "counterTime"); 823 #endif 824 case vmIntrinsics::_currentTimeMillis: return inline_native_time_funcs(CAST_FROM_FN_PTR(address, os::javaTimeMillis), "currentTimeMillis"); 825 case vmIntrinsics::_nanoTime: return inline_native_time_funcs(CAST_FROM_FN_PTR(address, os::javaTimeNanos), "nanoTime"); 826 case vmIntrinsics::_allocateInstance: return inline_unsafe_allocate(); 827 case vmIntrinsics::_copyMemory: return inline_unsafe_copyMemory(); 828 case vmIntrinsics::_newArray: return inline_native_newArray(); 829 case vmIntrinsics::_getLength: return inline_native_getLength(); 830 case vmIntrinsics::_copyOf: return inline_array_copyOf(false); 831 case vmIntrinsics::_copyOfRange: return inline_array_copyOf(true); 832 case vmIntrinsics::_equalsC: return inline_array_equals(); 833 case vmIntrinsics::_clone: return inline_native_clone(intrinsic()->is_virtual()); 834 835 case vmIntrinsics::_isAssignableFrom: return inline_native_subtype_check(); 836 837 case vmIntrinsics::_isInstance: 838 case vmIntrinsics::_getModifiers: 839 case vmIntrinsics::_isInterface: 840 case vmIntrinsics::_isArray: 841 case vmIntrinsics::_isPrimitive: 842 case vmIntrinsics::_getSuperclass: 843 case vmIntrinsics::_getComponentType: 844 case vmIntrinsics::_getClassAccessFlags: return inline_native_Class_query(intrinsic_id()); 845 846 case vmIntrinsics::_floatToRawIntBits: 847 case vmIntrinsics::_floatToIntBits: 848 case vmIntrinsics::_intBitsToFloat: 849 case vmIntrinsics::_doubleToRawLongBits: 850 case vmIntrinsics::_doubleToLongBits: 851 case vmIntrinsics::_longBitsToDouble: return inline_fp_conversions(intrinsic_id()); 852 853 case vmIntrinsics::_numberOfLeadingZeros_i: 854 case vmIntrinsics::_numberOfLeadingZeros_l: 855 case vmIntrinsics::_numberOfTrailingZeros_i: 856 case vmIntrinsics::_numberOfTrailingZeros_l: 857 case vmIntrinsics::_bitCount_i: 858 case vmIntrinsics::_bitCount_l: 859 case vmIntrinsics::_reverseBytes_i: 860 case vmIntrinsics::_reverseBytes_l: 861 case vmIntrinsics::_reverseBytes_s: 862 case vmIntrinsics::_reverseBytes_c: return inline_number_methods(intrinsic_id()); 863 864 case vmIntrinsics::_getCallerClass: return inline_native_Reflection_getCallerClass(); 865 866 case vmIntrinsics::_Reference_get: return inline_reference_get(); 867 868 case vmIntrinsics::_aescrypt_encryptBlock: 869 case vmIntrinsics::_aescrypt_decryptBlock: return inline_aescrypt_Block(intrinsic_id()); 870 871 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 872 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 873 return inline_cipherBlockChaining_AESCrypt(intrinsic_id()); 874 875 case vmIntrinsics::_encodeISOArray: 876 return inline_encodeISOArray(); 877 878 case vmIntrinsics::_updateCRC32: 879 return inline_updateCRC32(); 880 case vmIntrinsics::_updateBytesCRC32: 881 return inline_updateBytesCRC32(); 882 case vmIntrinsics::_updateByteBufferCRC32: 883 return inline_updateByteBufferCRC32(); 884 885 default: 886 // If you get here, it may be that someone has added a new intrinsic 887 // to the list in vmSymbols.hpp without implementing it here. 888 #ifndef PRODUCT 889 if ((PrintMiscellaneous && (Verbose || WizardMode)) || PrintOpto) { 890 tty->print_cr("*** Warning: Unimplemented intrinsic %s(%d)", 891 vmIntrinsics::name_at(intrinsic_id()), intrinsic_id()); 892 } 893 #endif 894 return false; 895 } 896 } 897 898 Node* LibraryCallKit::try_to_predicate() { 899 if (!jvms()->has_method()) { 900 // Root JVMState has a null method. 901 assert(map()->memory()->Opcode() == Op_Parm, ""); 902 // Insert the memory aliasing node 903 set_all_memory(reset_memory()); 904 } 905 assert(merged_memory(), ""); 906 907 switch (intrinsic_id()) { 908 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 909 return inline_cipherBlockChaining_AESCrypt_predicate(false); 910 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 911 return inline_cipherBlockChaining_AESCrypt_predicate(true); 912 913 default: 914 // If you get here, it may be that someone has added a new intrinsic 915 // to the list in vmSymbols.hpp without implementing it here. 916 #ifndef PRODUCT 917 if ((PrintMiscellaneous && (Verbose || WizardMode)) || PrintOpto) { 918 tty->print_cr("*** Warning: Unimplemented predicate for intrinsic %s(%d)", 919 vmIntrinsics::name_at(intrinsic_id()), intrinsic_id()); 920 } 921 #endif 922 Node* slow_ctl = control(); 923 set_control(top()); // No fast path instrinsic 924 return slow_ctl; 925 } 926 } 927 928 //------------------------------set_result------------------------------- 929 // Helper function for finishing intrinsics. 930 void LibraryCallKit::set_result(RegionNode* region, PhiNode* value) { 931 record_for_igvn(region); 932 set_control(_gvn.transform(region)); 933 set_result( _gvn.transform(value)); 934 assert(value->type()->basic_type() == result()->bottom_type()->basic_type(), "sanity"); 935 } 936 937 //------------------------------generate_guard--------------------------- 938 // Helper function for generating guarded fast-slow graph structures. 939 // The given 'test', if true, guards a slow path. If the test fails 940 // then a fast path can be taken. (We generally hope it fails.) 941 // In all cases, GraphKit::control() is updated to the fast path. 942 // The returned value represents the control for the slow path. 943 // The return value is never 'top'; it is either a valid control 944 // or NULL if it is obvious that the slow path can never be taken. 945 // Also, if region and the slow control are not NULL, the slow edge 946 // is appended to the region. 947 Node* LibraryCallKit::generate_guard(Node* test, RegionNode* region, float true_prob) { 948 if (stopped()) { 949 // Already short circuited. 950 return NULL; 951 } 952 953 // Build an if node and its projections. 954 // If test is true we take the slow path, which we assume is uncommon. 955 if (_gvn.type(test) == TypeInt::ZERO) { 956 // The slow branch is never taken. No need to build this guard. 957 return NULL; 958 } 959 960 IfNode* iff = create_and_map_if(control(), test, true_prob, COUNT_UNKNOWN); 961 962 Node* if_slow = _gvn.transform(new (C) IfTrueNode(iff)); 963 if (if_slow == top()) { 964 // The slow branch is never taken. No need to build this guard. 965 return NULL; 966 } 967 968 if (region != NULL) 969 region->add_req(if_slow); 970 971 Node* if_fast = _gvn.transform(new (C) IfFalseNode(iff)); 972 set_control(if_fast); 973 974 return if_slow; 975 } 976 977 inline Node* LibraryCallKit::generate_slow_guard(Node* test, RegionNode* region) { 978 return generate_guard(test, region, PROB_UNLIKELY_MAG(3)); 979 } 980 inline Node* LibraryCallKit::generate_fair_guard(Node* test, RegionNode* region) { 981 return generate_guard(test, region, PROB_FAIR); 982 } 983 984 inline Node* LibraryCallKit::generate_negative_guard(Node* index, RegionNode* region, 985 Node* *pos_index) { 986 if (stopped()) 987 return NULL; // already stopped 988 if (_gvn.type(index)->higher_equal(TypeInt::POS)) // [0,maxint] 989 return NULL; // index is already adequately typed 990 Node* cmp_lt = _gvn.transform(new (C) CmpINode(index, intcon(0))); 991 Node* bol_lt = _gvn.transform(new (C) BoolNode(cmp_lt, BoolTest::lt)); 992 Node* is_neg = generate_guard(bol_lt, region, PROB_MIN); 993 if (is_neg != NULL && pos_index != NULL) { 994 // Emulate effect of Parse::adjust_map_after_if. 995 Node* ccast = new (C) CastIINode(index, TypeInt::POS); 996 ccast->set_req(0, control()); 997 (*pos_index) = _gvn.transform(ccast); 998 } 999 return is_neg; 1000 } 1001 1002 inline Node* LibraryCallKit::generate_nonpositive_guard(Node* index, bool never_negative, 1003 Node* *pos_index) { 1004 if (stopped()) 1005 return NULL; // already stopped 1006 if (_gvn.type(index)->higher_equal(TypeInt::POS1)) // [1,maxint] 1007 return NULL; // index is already adequately typed 1008 Node* cmp_le = _gvn.transform(new (C) CmpINode(index, intcon(0))); 1009 BoolTest::mask le_or_eq = (never_negative ? BoolTest::eq : BoolTest::le); 1010 Node* bol_le = _gvn.transform(new (C) BoolNode(cmp_le, le_or_eq)); 1011 Node* is_notp = generate_guard(bol_le, NULL, PROB_MIN); 1012 if (is_notp != NULL && pos_index != NULL) { 1013 // Emulate effect of Parse::adjust_map_after_if. 1014 Node* ccast = new (C) CastIINode(index, TypeInt::POS1); 1015 ccast->set_req(0, control()); 1016 (*pos_index) = _gvn.transform(ccast); 1017 } 1018 return is_notp; 1019 } 1020 1021 // Make sure that 'position' is a valid limit index, in [0..length]. 1022 // There are two equivalent plans for checking this: 1023 // A. (offset + copyLength) unsigned<= arrayLength 1024 // B. offset <= (arrayLength - copyLength) 1025 // We require that all of the values above, except for the sum and 1026 // difference, are already known to be non-negative. 1027 // Plan A is robust in the face of overflow, if offset and copyLength 1028 // are both hugely positive. 1029 // 1030 // Plan B is less direct and intuitive, but it does not overflow at 1031 // all, since the difference of two non-negatives is always 1032 // representable. Whenever Java methods must perform the equivalent 1033 // check they generally use Plan B instead of Plan A. 1034 // For the moment we use Plan A. 1035 inline Node* LibraryCallKit::generate_limit_guard(Node* offset, 1036 Node* subseq_length, 1037 Node* array_length, 1038 RegionNode* region) { 1039 if (stopped()) 1040 return NULL; // already stopped 1041 bool zero_offset = _gvn.type(offset) == TypeInt::ZERO; 1042 if (zero_offset && subseq_length->eqv_uncast(array_length)) 1043 return NULL; // common case of whole-array copy 1044 Node* last = subseq_length; 1045 if (!zero_offset) // last += offset 1046 last = _gvn.transform(new (C) AddINode(last, offset)); 1047 Node* cmp_lt = _gvn.transform(new (C) CmpUNode(array_length, last)); 1048 Node* bol_lt = _gvn.transform(new (C) BoolNode(cmp_lt, BoolTest::lt)); 1049 Node* is_over = generate_guard(bol_lt, region, PROB_MIN); 1050 return is_over; 1051 } 1052 1053 1054 //--------------------------generate_current_thread-------------------- 1055 Node* LibraryCallKit::generate_current_thread(Node* &tls_output) { 1056 ciKlass* thread_klass = env()->Thread_klass(); 1057 const Type* thread_type = TypeOopPtr::make_from_klass(thread_klass)->cast_to_ptr_type(TypePtr::NotNull); 1058 Node* thread = _gvn.transform(new (C) ThreadLocalNode()); 1059 Node* p = basic_plus_adr(top()/*!oop*/, thread, in_bytes(JavaThread::threadObj_offset())); 1060 Node* threadObj = make_load(NULL, p, thread_type, T_OBJECT); 1061 tls_output = thread; 1062 return threadObj; 1063 } 1064 1065 1066 //------------------------------make_string_method_node------------------------ 1067 // Helper method for String intrinsic functions. This version is called 1068 // with str1 and str2 pointing to String object nodes. 1069 // 1070 Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1, Node* str2) { 1071 Node* no_ctrl = NULL; 1072 1073 // Get start addr of string 1074 Node* str1_value = load_String_value(no_ctrl, str1); 1075 Node* str1_offset = load_String_offset(no_ctrl, str1); 1076 Node* str1_start = array_element_address(str1_value, str1_offset, T_CHAR); 1077 1078 // Get length of string 1 1079 Node* str1_len = load_String_length(no_ctrl, str1); 1080 1081 Node* str2_value = load_String_value(no_ctrl, str2); 1082 Node* str2_offset = load_String_offset(no_ctrl, str2); 1083 Node* str2_start = array_element_address(str2_value, str2_offset, T_CHAR); 1084 1085 Node* str2_len = NULL; 1086 Node* result = NULL; 1087 1088 switch (opcode) { 1089 case Op_StrIndexOf: 1090 // Get length of string 2 1091 str2_len = load_String_length(no_ctrl, str2); 1092 1093 result = new (C) StrIndexOfNode(control(), memory(TypeAryPtr::CHARS), 1094 str1_start, str1_len, str2_start, str2_len); 1095 break; 1096 case Op_StrComp: 1097 // Get length of string 2 1098 str2_len = load_String_length(no_ctrl, str2); 1099 1100 result = new (C) StrCompNode(control(), memory(TypeAryPtr::CHARS), 1101 str1_start, str1_len, str2_start, str2_len); 1102 break; 1103 case Op_StrEquals: 1104 result = new (C) StrEqualsNode(control(), memory(TypeAryPtr::CHARS), 1105 str1_start, str2_start, str1_len); 1106 break; 1107 default: 1108 ShouldNotReachHere(); 1109 return NULL; 1110 } 1111 1112 // All these intrinsics have checks. 1113 C->set_has_split_ifs(true); // Has chance for split-if optimization 1114 1115 return _gvn.transform(result); 1116 } 1117 1118 // Helper method for String intrinsic functions. This version is called 1119 // with str1 and str2 pointing to char[] nodes, with cnt1 and cnt2 pointing 1120 // to Int nodes containing the lenghts of str1 and str2. 1121 // 1122 Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2) { 1123 Node* result = NULL; 1124 switch (opcode) { 1125 case Op_StrIndexOf: 1126 result = new (C) StrIndexOfNode(control(), memory(TypeAryPtr::CHARS), 1127 str1_start, cnt1, str2_start, cnt2); 1128 break; 1129 case Op_StrComp: 1130 result = new (C) StrCompNode(control(), memory(TypeAryPtr::CHARS), 1131 str1_start, cnt1, str2_start, cnt2); 1132 break; 1133 case Op_StrEquals: 1134 result = new (C) StrEqualsNode(control(), memory(TypeAryPtr::CHARS), 1135 str1_start, str2_start, cnt1); 1136 break; 1137 default: 1138 ShouldNotReachHere(); 1139 return NULL; 1140 } 1141 1142 // All these intrinsics have checks. 1143 C->set_has_split_ifs(true); // Has chance for split-if optimization 1144 1145 return _gvn.transform(result); 1146 } 1147 1148 //------------------------------inline_string_compareTo------------------------ 1149 // public int java.lang.String.compareTo(String anotherString); 1150 bool LibraryCallKit::inline_string_compareTo() { 1151 Node* receiver = null_check(argument(0)); 1152 Node* arg = null_check(argument(1)); 1153 if (stopped()) { 1154 return true; 1155 } 1156 set_result(make_string_method_node(Op_StrComp, receiver, arg)); 1157 return true; 1158 } 1159 1160 //------------------------------inline_string_equals------------------------ 1161 bool LibraryCallKit::inline_string_equals() { 1162 Node* receiver = null_check_receiver(); 1163 // NOTE: Do not null check argument for String.equals() because spec 1164 // allows to specify NULL as argument. 1165 Node* argument = this->argument(1); 1166 if (stopped()) { 1167 return true; 1168 } 1169 1170 // paths (plus control) merge 1171 RegionNode* region = new (C) RegionNode(5); 1172 Node* phi = new (C) PhiNode(region, TypeInt::BOOL); 1173 1174 // does source == target string? 1175 Node* cmp = _gvn.transform(new (C) CmpPNode(receiver, argument)); 1176 Node* bol = _gvn.transform(new (C) BoolNode(cmp, BoolTest::eq)); 1177 1178 Node* if_eq = generate_slow_guard(bol, NULL); 1179 if (if_eq != NULL) { 1180 // receiver == argument 1181 phi->init_req(2, intcon(1)); 1182 region->init_req(2, if_eq); 1183 } 1184 1185 // get String klass for instanceOf 1186 ciInstanceKlass* klass = env()->String_klass(); 1187 1188 if (!stopped()) { 1189 Node* inst = gen_instanceof(argument, makecon(TypeKlassPtr::make(klass))); 1190 Node* cmp = _gvn.transform(new (C) CmpINode(inst, intcon(1))); 1191 Node* bol = _gvn.transform(new (C) BoolNode(cmp, BoolTest::ne)); 1192 1193 Node* inst_false = generate_guard(bol, NULL, PROB_MIN); 1194 //instanceOf == true, fallthrough 1195 1196 if (inst_false != NULL) { 1197 phi->init_req(3, intcon(0)); 1198 region->init_req(3, inst_false); 1199 } 1200 } 1201 1202 if (!stopped()) { 1203 const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); 1204 1205 // Properly cast the argument to String 1206 argument = _gvn.transform(new (C) CheckCastPPNode(control(), argument, string_type)); 1207 // This path is taken only when argument's type is String:NotNull. 1208 argument = cast_not_null(argument, false); 1209 1210 Node* no_ctrl = NULL; 1211 1212 // Get start addr of receiver 1213 Node* receiver_val = load_String_value(no_ctrl, receiver); 1214 Node* receiver_offset = load_String_offset(no_ctrl, receiver); 1215 Node* receiver_start = array_element_address(receiver_val, receiver_offset, T_CHAR); 1216 1217 // Get length of receiver 1218 Node* receiver_cnt = load_String_length(no_ctrl, receiver); 1219 1220 // Get start addr of argument 1221 Node* argument_val = load_String_value(no_ctrl, argument); 1222 Node* argument_offset = load_String_offset(no_ctrl, argument); 1223 Node* argument_start = array_element_address(argument_val, argument_offset, T_CHAR); 1224 1225 // Get length of argument 1226 Node* argument_cnt = load_String_length(no_ctrl, argument); 1227 1228 // Check for receiver count != argument count 1229 Node* cmp = _gvn.transform(new(C) CmpINode(receiver_cnt, argument_cnt)); 1230 Node* bol = _gvn.transform(new(C) BoolNode(cmp, BoolTest::ne)); 1231 Node* if_ne = generate_slow_guard(bol, NULL); 1232 if (if_ne != NULL) { 1233 phi->init_req(4, intcon(0)); 1234 region->init_req(4, if_ne); 1235 } 1236 1237 // Check for count == 0 is done by assembler code for StrEquals. 1238 1239 if (!stopped()) { 1240 Node* equals = make_string_method_node(Op_StrEquals, receiver_start, receiver_cnt, argument_start, argument_cnt); 1241 phi->init_req(1, equals); 1242 region->init_req(1, control()); 1243 } 1244 } 1245 1246 // post merge 1247 set_control(_gvn.transform(region)); 1248 record_for_igvn(region); 1249 1250 set_result(_gvn.transform(phi)); 1251 return true; 1252 } 1253 1254 //------------------------------inline_array_equals---------------------------- 1255 bool LibraryCallKit::inline_array_equals() { 1256 Node* arg1 = argument(0); 1257 Node* arg2 = argument(1); 1258 set_result(_gvn.transform(new (C) AryEqNode(control(), memory(TypeAryPtr::CHARS), arg1, arg2))); 1259 return true; 1260 } 1261 1262 // Java version of String.indexOf(constant string) 1263 // class StringDecl { 1264 // StringDecl(char[] ca) { 1265 // offset = 0; 1266 // count = ca.length; 1267 // value = ca; 1268 // } 1269 // int offset; 1270 // int count; 1271 // char[] value; 1272 // } 1273 // 1274 // static int string_indexOf_J(StringDecl string_object, char[] target_object, 1275 // int targetOffset, int cache_i, int md2) { 1276 // int cache = cache_i; 1277 // int sourceOffset = string_object.offset; 1278 // int sourceCount = string_object.count; 1279 // int targetCount = target_object.length; 1280 // 1281 // int targetCountLess1 = targetCount - 1; 1282 // int sourceEnd = sourceOffset + sourceCount - targetCountLess1; 1283 // 1284 // char[] source = string_object.value; 1285 // char[] target = target_object; 1286 // int lastChar = target[targetCountLess1]; 1287 // 1288 // outer_loop: 1289 // for (int i = sourceOffset; i < sourceEnd; ) { 1290 // int src = source[i + targetCountLess1]; 1291 // if (src == lastChar) { 1292 // // With random strings and a 4-character alphabet, 1293 // // reverse matching at this point sets up 0.8% fewer 1294 // // frames, but (paradoxically) makes 0.3% more probes. 1295 // // Since those probes are nearer the lastChar probe, 1296 // // there is may be a net D$ win with reverse matching. 1297 // // But, reversing loop inhibits unroll of inner loop 1298 // // for unknown reason. So, does running outer loop from 1299 // // (sourceOffset - targetCountLess1) to (sourceOffset + sourceCount) 1300 // for (int j = 0; j < targetCountLess1; j++) { 1301 // if (target[targetOffset + j] != source[i+j]) { 1302 // if ((cache & (1 << source[i+j])) == 0) { 1303 // if (md2 < j+1) { 1304 // i += j+1; 1305 // continue outer_loop; 1306 // } 1307 // } 1308 // i += md2; 1309 // continue outer_loop; 1310 // } 1311 // } 1312 // return i - sourceOffset; 1313 // } 1314 // if ((cache & (1 << src)) == 0) { 1315 // i += targetCountLess1; 1316 // } // using "i += targetCount;" and an "else i++;" causes a jump to jump. 1317 // i++; 1318 // } 1319 // return -1; 1320 // } 1321 1322 //------------------------------string_indexOf------------------------ 1323 Node* LibraryCallKit::string_indexOf(Node* string_object, ciTypeArray* target_array, jint targetOffset_i, 1324 jint cache_i, jint md2_i) { 1325 1326 Node* no_ctrl = NULL; 1327 float likely = PROB_LIKELY(0.9); 1328 float unlikely = PROB_UNLIKELY(0.9); 1329 1330 const int nargs = 0; // no arguments to push back for uncommon trap in predicate 1331 1332 Node* source = load_String_value(no_ctrl, string_object); 1333 Node* sourceOffset = load_String_offset(no_ctrl, string_object); 1334 Node* sourceCount = load_String_length(no_ctrl, string_object); 1335 1336 Node* target = _gvn.transform( makecon(TypeOopPtr::make_from_constant(target_array, true))); 1337 jint target_length = target_array->length(); 1338 const TypeAry* target_array_type = TypeAry::make(TypeInt::CHAR, TypeInt::make(0, target_length, Type::WidenMin)); 1339 const TypeAryPtr* target_type = TypeAryPtr::make(TypePtr::BotPTR, target_array_type, target_array->klass(), true, Type::OffsetBot); 1340 1341 // String.value field is known to be @Stable. 1342 if (UseImplicitStableValues) { 1343 target = cast_array_to_stable(target, target_type); 1344 } 1345 1346 IdealKit kit(this, false, true); 1347 #define __ kit. 1348 Node* zero = __ ConI(0); 1349 Node* one = __ ConI(1); 1350 Node* cache = __ ConI(cache_i); 1351 Node* md2 = __ ConI(md2_i); 1352 Node* lastChar = __ ConI(target_array->char_at(target_length - 1)); 1353 Node* targetCount = __ ConI(target_length); 1354 Node* targetCountLess1 = __ ConI(target_length - 1); 1355 Node* targetOffset = __ ConI(targetOffset_i); 1356 Node* sourceEnd = __ SubI(__ AddI(sourceOffset, sourceCount), targetCountLess1); 1357 1358 IdealVariable rtn(kit), i(kit), j(kit); __ declarations_done(); 1359 Node* outer_loop = __ make_label(2 /* goto */); 1360 Node* return_ = __ make_label(1); 1361 1362 __ set(rtn,__ ConI(-1)); 1363 __ loop(this, nargs, i, sourceOffset, BoolTest::lt, sourceEnd); { 1364 Node* i2 = __ AddI(__ value(i), targetCountLess1); 1365 // pin to prohibit loading of "next iteration" value which may SEGV (rare) 1366 Node* src = load_array_element(__ ctrl(), source, i2, TypeAryPtr::CHARS); 1367 __ if_then(src, BoolTest::eq, lastChar, unlikely); { 1368 __ loop(this, nargs, j, zero, BoolTest::lt, targetCountLess1); { 1369 Node* tpj = __ AddI(targetOffset, __ value(j)); 1370 Node* targ = load_array_element(no_ctrl, target, tpj, target_type); 1371 Node* ipj = __ AddI(__ value(i), __ value(j)); 1372 Node* src2 = load_array_element(no_ctrl, source, ipj, TypeAryPtr::CHARS); 1373 __ if_then(targ, BoolTest::ne, src2); { 1374 __ if_then(__ AndI(cache, __ LShiftI(one, src2)), BoolTest::eq, zero); { 1375 __ if_then(md2, BoolTest::lt, __ AddI(__ value(j), one)); { 1376 __ increment(i, __ AddI(__ value(j), one)); 1377 __ goto_(outer_loop); 1378 } __ end_if(); __ dead(j); 1379 }__ end_if(); __ dead(j); 1380 __ increment(i, md2); 1381 __ goto_(outer_loop); 1382 }__ end_if(); 1383 __ increment(j, one); 1384 }__ end_loop(); __ dead(j); 1385 __ set(rtn, __ SubI(__ value(i), sourceOffset)); __ dead(i); 1386 __ goto_(return_); 1387 }__ end_if(); 1388 __ if_then(__ AndI(cache, __ LShiftI(one, src)), BoolTest::eq, zero, likely); { 1389 __ increment(i, targetCountLess1); 1390 }__ end_if(); 1391 __ increment(i, one); 1392 __ bind(outer_loop); 1393 }__ end_loop(); __ dead(i); 1394 __ bind(return_); 1395 1396 // Final sync IdealKit and GraphKit. 1397 final_sync(kit); 1398 Node* result = __ value(rtn); 1399 #undef __ 1400 C->set_has_loops(true); 1401 return result; 1402 } 1403 1404 //------------------------------inline_string_indexOf------------------------ 1405 bool LibraryCallKit::inline_string_indexOf() { 1406 Node* receiver = argument(0); 1407 Node* arg = argument(1); 1408 1409 Node* result; 1410 // Disable the use of pcmpestri until it can be guaranteed that 1411 // the load doesn't cross into the uncommited space. 1412 if (Matcher::has_match_rule(Op_StrIndexOf) && 1413 UseSSE42Intrinsics) { 1414 // Generate SSE4.2 version of indexOf 1415 // We currently only have match rules that use SSE4.2 1416 1417 receiver = null_check(receiver); 1418 arg = null_check(arg); 1419 if (stopped()) { 1420 return true; 1421 } 1422 1423 ciInstanceKlass* str_klass = env()->String_klass(); 1424 const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(str_klass); 1425 1426 // Make the merge point 1427 RegionNode* result_rgn = new (C) RegionNode(4); 1428 Node* result_phi = new (C) PhiNode(result_rgn, TypeInt::INT); 1429 Node* no_ctrl = NULL; 1430 1431 // Get start addr of source string 1432 Node* source = load_String_value(no_ctrl, receiver); 1433 Node* source_offset = load_String_offset(no_ctrl, receiver); 1434 Node* source_start = array_element_address(source, source_offset, T_CHAR); 1435 1436 // Get length of source string 1437 Node* source_cnt = load_String_length(no_ctrl, receiver); 1438 1439 // Get start addr of substring 1440 Node* substr = load_String_value(no_ctrl, arg); 1441 Node* substr_offset = load_String_offset(no_ctrl, arg); 1442 Node* substr_start = array_element_address(substr, substr_offset, T_CHAR); 1443 1444 // Get length of source string 1445 Node* substr_cnt = load_String_length(no_ctrl, arg); 1446 1447 // Check for substr count > string count 1448 Node* cmp = _gvn.transform(new(C) CmpINode(substr_cnt, source_cnt)); 1449 Node* bol = _gvn.transform(new(C) BoolNode(cmp, BoolTest::gt)); 1450 Node* if_gt = generate_slow_guard(bol, NULL); 1451 if (if_gt != NULL) { 1452 result_phi->init_req(2, intcon(-1)); 1453 result_rgn->init_req(2, if_gt); 1454 } 1455 1456 if (!stopped()) { 1457 // Check for substr count == 0 1458 cmp = _gvn.transform(new(C) CmpINode(substr_cnt, intcon(0))); 1459 bol = _gvn.transform(new(C) BoolNode(cmp, BoolTest::eq)); 1460 Node* if_zero = generate_slow_guard(bol, NULL); 1461 if (if_zero != NULL) { 1462 result_phi->init_req(3, intcon(0)); 1463 result_rgn->init_req(3, if_zero); 1464 } 1465 } 1466 1467 if (!stopped()) { 1468 result = make_string_method_node(Op_StrIndexOf, source_start, source_cnt, substr_start, substr_cnt); 1469 result_phi->init_req(1, result); 1470 result_rgn->init_req(1, control()); 1471 } 1472 set_control(_gvn.transform(result_rgn)); 1473 record_for_igvn(result_rgn); 1474 result = _gvn.transform(result_phi); 1475 1476 } else { // Use LibraryCallKit::string_indexOf 1477 // don't intrinsify if argument isn't a constant string. 1478 if (!arg->is_Con()) { 1479 return false; 1480 } 1481 const TypeOopPtr* str_type = _gvn.type(arg)->isa_oopptr(); 1482 if (str_type == NULL) { 1483 return false; 1484 } 1485 ciInstanceKlass* klass = env()->String_klass(); 1486 ciObject* str_const = str_type->const_oop(); 1487 if (str_const == NULL || str_const->klass() != klass) { 1488 return false; 1489 } 1490 ciInstance* str = str_const->as_instance(); 1491 assert(str != NULL, "must be instance"); 1492 1493 ciObject* v = str->field_value_by_offset(java_lang_String::value_offset_in_bytes()).as_object(); 1494 ciTypeArray* pat = v->as_type_array(); // pattern (argument) character array 1495 1496 int o; 1497 int c; 1498 if (java_lang_String::has_offset_field()) { 1499 o = str->field_value_by_offset(java_lang_String::offset_offset_in_bytes()).as_int(); 1500 c = str->field_value_by_offset(java_lang_String::count_offset_in_bytes()).as_int(); 1501 } else { 1502 o = 0; 1503 c = pat->length(); 1504 } 1505 1506 // constant strings have no offset and count == length which 1507 // simplifies the resulting code somewhat so lets optimize for that. 1508 if (o != 0 || c != pat->length()) { 1509 return false; 1510 } 1511 1512 receiver = null_check(receiver, T_OBJECT); 1513 // NOTE: No null check on the argument is needed since it's a constant String oop. 1514 if (stopped()) { 1515 return true; 1516 } 1517 1518 // The null string as a pattern always returns 0 (match at beginning of string) 1519 if (c == 0) { 1520 set_result(intcon(0)); 1521 return true; 1522 } 1523 1524 // Generate default indexOf 1525 jchar lastChar = pat->char_at(o + (c - 1)); 1526 int cache = 0; 1527 int i; 1528 for (i = 0; i < c - 1; i++) { 1529 assert(i < pat->length(), "out of range"); 1530 cache |= (1 << (pat->char_at(o + i) & (sizeof(cache) * BitsPerByte - 1))); 1531 } 1532 1533 int md2 = c; 1534 for (i = 0; i < c - 1; i++) { 1535 assert(i < pat->length(), "out of range"); 1536 if (pat->char_at(o + i) == lastChar) { 1537 md2 = (c - 1) - i; 1538 } 1539 } 1540 1541 result = string_indexOf(receiver, pat, o, cache, md2); 1542 } 1543 set_result(result); 1544 return true; 1545 } 1546 1547 //--------------------------round_double_node-------------------------------- 1548 // Round a double node if necessary. 1549 Node* LibraryCallKit::round_double_node(Node* n) { 1550 if (Matcher::strict_fp_requires_explicit_rounding && UseSSE <= 1) 1551 n = _gvn.transform(new (C) RoundDoubleNode(0, n)); 1552 return n; 1553 } 1554 1555 //------------------------------inline_math----------------------------------- 1556 // public static double Math.abs(double) 1557 // public static double Math.sqrt(double) 1558 // public static double Math.log(double) 1559 // public static double Math.log10(double) 1560 bool LibraryCallKit::inline_math(vmIntrinsics::ID id) { 1561 Node* arg = round_double_node(argument(0)); 1562 Node* n; 1563 switch (id) { 1564 case vmIntrinsics::_dabs: n = new (C) AbsDNode( arg); break; 1565 case vmIntrinsics::_dsqrt: n = new (C) SqrtDNode(C, control(), arg); break; 1566 case vmIntrinsics::_dlog: n = new (C) LogDNode(C, control(), arg); break; 1567 case vmIntrinsics::_dlog10: n = new (C) Log10DNode(C, control(), arg); break; 1568 default: fatal_unexpected_iid(id); break; 1569 } 1570 set_result(_gvn.transform(n)); 1571 return true; 1572 } 1573 1574 //------------------------------inline_trig---------------------------------- 1575 // Inline sin/cos/tan instructions, if possible. If rounding is required, do 1576 // argument reduction which will turn into a fast/slow diamond. 1577 bool LibraryCallKit::inline_trig(vmIntrinsics::ID id) { 1578 Node* arg = round_double_node(argument(0)); 1579 Node* n = NULL; 1580 1581 switch (id) { 1582 case vmIntrinsics::_dsin: n = new (C) SinDNode(C, control(), arg); break; 1583 case vmIntrinsics::_dcos: n = new (C) CosDNode(C, control(), arg); break; 1584 case vmIntrinsics::_dtan: n = new (C) TanDNode(C, control(), arg); break; 1585 default: fatal_unexpected_iid(id); break; 1586 } 1587 n = _gvn.transform(n); 1588 1589 // Rounding required? Check for argument reduction! 1590 if (Matcher::strict_fp_requires_explicit_rounding) { 1591 static const double pi_4 = 0.7853981633974483; 1592 static const double neg_pi_4 = -0.7853981633974483; 1593 // pi/2 in 80-bit extended precision 1594 // static const unsigned char pi_2_bits_x[] = {0x35,0xc2,0x68,0x21,0xa2,0xda,0x0f,0xc9,0xff,0x3f,0x00,0x00,0x00,0x00,0x00,0x00}; 1595 // -pi/2 in 80-bit extended precision 1596 // static const unsigned char neg_pi_2_bits_x[] = {0x35,0xc2,0x68,0x21,0xa2,0xda,0x0f,0xc9,0xff,0xbf,0x00,0x00,0x00,0x00,0x00,0x00}; 1597 // Cutoff value for using this argument reduction technique 1598 //static const double pi_2_minus_epsilon = 1.564660403643354; 1599 //static const double neg_pi_2_plus_epsilon = -1.564660403643354; 1600 1601 // Pseudocode for sin: 1602 // if (x <= Math.PI / 4.0) { 1603 // if (x >= -Math.PI / 4.0) return fsin(x); 1604 // if (x >= -Math.PI / 2.0) return -fcos(x + Math.PI / 2.0); 1605 // } else { 1606 // if (x <= Math.PI / 2.0) return fcos(x - Math.PI / 2.0); 1607 // } 1608 // return StrictMath.sin(x); 1609 1610 // Pseudocode for cos: 1611 // if (x <= Math.PI / 4.0) { 1612 // if (x >= -Math.PI / 4.0) return fcos(x); 1613 // if (x >= -Math.PI / 2.0) return fsin(x + Math.PI / 2.0); 1614 // } else { 1615 // if (x <= Math.PI / 2.0) return -fsin(x - Math.PI / 2.0); 1616 // } 1617 // return StrictMath.cos(x); 1618 1619 // Actually, sticking in an 80-bit Intel value into C2 will be tough; it 1620 // requires a special machine instruction to load it. Instead we'll try 1621 // the 'easy' case. If we really need the extra range +/- PI/2 we'll 1622 // probably do the math inside the SIN encoding. 1623 1624 // Make the merge point 1625 RegionNode* r = new (C) RegionNode(3); 1626 Node* phi = new (C) PhiNode(r, Type::DOUBLE); 1627 1628 // Flatten arg so we need only 1 test 1629 Node *abs = _gvn.transform(new (C) AbsDNode(arg)); 1630 // Node for PI/4 constant 1631 Node *pi4 = makecon(TypeD::make(pi_4)); 1632 // Check PI/4 : abs(arg) 1633 Node *cmp = _gvn.transform(new (C) CmpDNode(pi4,abs)); 1634 // Check: If PI/4 < abs(arg) then go slow 1635 Node *bol = _gvn.transform(new (C) BoolNode( cmp, BoolTest::lt )); 1636 // Branch either way 1637 IfNode *iff = create_and_xform_if(control(),bol, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); 1638 set_control(opt_iff(r,iff)); 1639 1640 // Set fast path result 1641 phi->init_req(2, n); 1642 1643 // Slow path - non-blocking leaf call 1644 Node* call = NULL; 1645 switch (id) { 1646 case vmIntrinsics::_dsin: 1647 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), 1648 CAST_FROM_FN_PTR(address, SharedRuntime::dsin), 1649 "Sin", NULL, arg, top()); 1650 break; 1651 case vmIntrinsics::_dcos: 1652 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), 1653 CAST_FROM_FN_PTR(address, SharedRuntime::dcos), 1654 "Cos", NULL, arg, top()); 1655 break; 1656 case vmIntrinsics::_dtan: 1657 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), 1658 CAST_FROM_FN_PTR(address, SharedRuntime::dtan), 1659 "Tan", NULL, arg, top()); 1660 break; 1661 } 1662 assert(control()->in(0) == call, ""); 1663 Node* slow_result = _gvn.transform(new (C) ProjNode(call, TypeFunc::Parms)); 1664 r->init_req(1, control()); 1665 phi->init_req(1, slow_result); 1666 1667 // Post-merge 1668 set_control(_gvn.transform(r)); 1669 record_for_igvn(r); 1670 n = _gvn.transform(phi); 1671 1672 C->set_has_split_ifs(true); // Has chance for split-if optimization 1673 } 1674 set_result(n); 1675 return true; 1676 } 1677 1678 void LibraryCallKit::finish_pow_exp(Node* result, Node* x, Node* y, const TypeFunc* call_type, address funcAddr, const char* funcName) { 1679 //------------------- 1680 //result=(result.isNaN())? funcAddr():result; 1681 // Check: If isNaN() by checking result!=result? then either trap 1682 // or go to runtime 1683 Node* cmpisnan = _gvn.transform(new (C) CmpDNode(result, result)); 1684 // Build the boolean node 1685 Node* bolisnum = _gvn.transform(new (C) BoolNode(cmpisnan, BoolTest::eq)); 1686 1687 if (!too_many_traps(Deoptimization::Reason_intrinsic)) { 1688 { BuildCutout unless(this, bolisnum, PROB_STATIC_FREQUENT); 1689 // The pow or exp intrinsic returned a NaN, which requires a call 1690 // to the runtime. Recompile with the runtime call. 1691 uncommon_trap(Deoptimization::Reason_intrinsic, 1692 Deoptimization::Action_make_not_entrant); 1693 } 1694 set_result(result); 1695 } else { 1696 // If this inlining ever returned NaN in the past, we compile a call 1697 // to the runtime to properly handle corner cases 1698 1699 IfNode* iff = create_and_xform_if(control(), bolisnum, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); 1700 Node* if_slow = _gvn.transform(new (C) IfFalseNode(iff)); 1701 Node* if_fast = _gvn.transform(new (C) IfTrueNode(iff)); 1702 1703 if (!if_slow->is_top()) { 1704 RegionNode* result_region = new (C) RegionNode(3); 1705 PhiNode* result_val = new (C) PhiNode(result_region, Type::DOUBLE); 1706 1707 result_region->init_req(1, if_fast); 1708 result_val->init_req(1, result); 1709 1710 set_control(if_slow); 1711 1712 const TypePtr* no_memory_effects = NULL; 1713 Node* rt = make_runtime_call(RC_LEAF, call_type, funcAddr, funcName, 1714 no_memory_effects, 1715 x, top(), y, y ? top() : NULL); 1716 Node* value = _gvn.transform(new (C) ProjNode(rt, TypeFunc::Parms+0)); 1717 #ifdef ASSERT 1718 Node* value_top = _gvn.transform(new (C) ProjNode(rt, TypeFunc::Parms+1)); 1719 assert(value_top == top(), "second value must be top"); 1720 #endif 1721 1722 result_region->init_req(2, control()); 1723 result_val->init_req(2, value); 1724 set_result(result_region, result_val); 1725 } else { 1726 set_result(result); 1727 } 1728 } 1729 } 1730 1731 //------------------------------inline_exp------------------------------------- 1732 // Inline exp instructions, if possible. The Intel hardware only misses 1733 // really odd corner cases (+/- Infinity). Just uncommon-trap them. 1734 bool LibraryCallKit::inline_exp() { 1735 Node* arg = round_double_node(argument(0)); 1736 Node* n = _gvn.transform(new (C) ExpDNode(C, control(), arg)); 1737 1738 finish_pow_exp(n, arg, NULL, OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dexp), "EXP"); 1739 1740 C->set_has_split_ifs(true); // Has chance for split-if optimization 1741 return true; 1742 } 1743 1744 //------------------------------inline_pow------------------------------------- 1745 // Inline power instructions, if possible. 1746 bool LibraryCallKit::inline_pow() { 1747 // Pseudocode for pow 1748 // if (x <= 0.0) { 1749 // long longy = (long)y; 1750 // if ((double)longy == y) { // if y is long 1751 // if (y + 1 == y) longy = 0; // huge number: even 1752 // result = ((1&longy) == 0)?-DPow(abs(x), y):DPow(abs(x), y); 1753 // } else { 1754 // result = NaN; 1755 // } 1756 // } else { 1757 // result = DPow(x,y); 1758 // } 1759 // if (result != result)? { 1760 // result = uncommon_trap() or runtime_call(); 1761 // } 1762 // return result; 1763 1764 Node* x = round_double_node(argument(0)); 1765 Node* y = round_double_node(argument(2)); 1766 1767 Node* result = NULL; 1768 1769 if (!too_many_traps(Deoptimization::Reason_intrinsic)) { 1770 // Short form: skip the fancy tests and just check for NaN result. 1771 result = _gvn.transform(new (C) PowDNode(C, control(), x, y)); 1772 } else { 1773 // If this inlining ever returned NaN in the past, include all 1774 // checks + call to the runtime. 1775 1776 // Set the merge point for If node with condition of (x <= 0.0) 1777 // There are four possible paths to region node and phi node 1778 RegionNode *r = new (C) RegionNode(4); 1779 Node *phi = new (C) PhiNode(r, Type::DOUBLE); 1780 1781 // Build the first if node: if (x <= 0.0) 1782 // Node for 0 constant 1783 Node *zeronode = makecon(TypeD::ZERO); 1784 // Check x:0 1785 Node *cmp = _gvn.transform(new (C) CmpDNode(x, zeronode)); 1786 // Check: If (x<=0) then go complex path 1787 Node *bol1 = _gvn.transform(new (C) BoolNode( cmp, BoolTest::le )); 1788 // Branch either way 1789 IfNode *if1 = create_and_xform_if(control(),bol1, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN); 1790 // Fast path taken; set region slot 3 1791 Node *fast_taken = _gvn.transform(new (C) IfFalseNode(if1)); 1792 r->init_req(3,fast_taken); // Capture fast-control 1793 1794 // Fast path not-taken, i.e. slow path 1795 Node *complex_path = _gvn.transform(new (C) IfTrueNode(if1)); 1796 1797 // Set fast path result 1798 Node *fast_result = _gvn.transform(new (C) PowDNode(C, control(), x, y)); 1799 phi->init_req(3, fast_result); 1800 1801 // Complex path 1802 // Build the second if node (if y is long) 1803 // Node for (long)y 1804 Node *longy = _gvn.transform(new (C) ConvD2LNode(y)); 1805 // Node for (double)((long) y) 1806 Node *doublelongy= _gvn.transform(new (C) ConvL2DNode(longy)); 1807 // Check (double)((long) y) : y 1808 Node *cmplongy= _gvn.transform(new (C) CmpDNode(doublelongy, y)); 1809 // Check if (y isn't long) then go to slow path 1810 1811 Node *bol2 = _gvn.transform(new (C) BoolNode( cmplongy, BoolTest::ne )); 1812 // Branch either way 1813 IfNode *if2 = create_and_xform_if(complex_path,bol2, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN); 1814 Node* ylong_path = _gvn.transform(new (C) IfFalseNode(if2)); 1815 1816 Node *slow_path = _gvn.transform(new (C) IfTrueNode(if2)); 1817 1818 // Calculate DPow(abs(x), y)*(1 & (long)y) 1819 // Node for constant 1 1820 Node *conone = longcon(1); 1821 // 1& (long)y 1822 Node *signnode= _gvn.transform(new (C) AndLNode(conone, longy)); 1823 1824 // A huge number is always even. Detect a huge number by checking 1825 // if y + 1 == y and set integer to be tested for parity to 0. 1826 // Required for corner case: 1827 // (long)9.223372036854776E18 = max_jlong 1828 // (double)(long)9.223372036854776E18 = 9.223372036854776E18 1829 // max_jlong is odd but 9.223372036854776E18 is even 1830 Node* yplus1 = _gvn.transform(new (C) AddDNode(y, makecon(TypeD::make(1)))); 1831 Node *cmpyplus1= _gvn.transform(new (C) CmpDNode(yplus1, y)); 1832 Node *bolyplus1 = _gvn.transform(new (C) BoolNode( cmpyplus1, BoolTest::eq )); 1833 Node* correctedsign = NULL; 1834 if (ConditionalMoveLimit != 0) { 1835 correctedsign = _gvn.transform( CMoveNode::make(C, NULL, bolyplus1, signnode, longcon(0), TypeLong::LONG)); 1836 } else { 1837 IfNode *ifyplus1 = create_and_xform_if(ylong_path,bolyplus1, PROB_FAIR, COUNT_UNKNOWN); 1838 RegionNode *r = new (C) RegionNode(3); 1839 Node *phi = new (C) PhiNode(r, TypeLong::LONG); 1840 r->init_req(1, _gvn.transform(new (C) IfFalseNode(ifyplus1))); 1841 r->init_req(2, _gvn.transform(new (C) IfTrueNode(ifyplus1))); 1842 phi->init_req(1, signnode); 1843 phi->init_req(2, longcon(0)); 1844 correctedsign = _gvn.transform(phi); 1845 ylong_path = _gvn.transform(r); 1846 record_for_igvn(r); 1847 } 1848 1849 // zero node 1850 Node *conzero = longcon(0); 1851 // Check (1&(long)y)==0? 1852 Node *cmpeq1 = _gvn.transform(new (C) CmpLNode(correctedsign, conzero)); 1853 // Check if (1&(long)y)!=0?, if so the result is negative 1854 Node *bol3 = _gvn.transform(new (C) BoolNode( cmpeq1, BoolTest::ne )); 1855 // abs(x) 1856 Node *absx=_gvn.transform(new (C) AbsDNode(x)); 1857 // abs(x)^y 1858 Node *absxpowy = _gvn.transform(new (C) PowDNode(C, control(), absx, y)); 1859 // -abs(x)^y 1860 Node *negabsxpowy = _gvn.transform(new (C) NegDNode (absxpowy)); 1861 // (1&(long)y)==1?-DPow(abs(x), y):DPow(abs(x), y) 1862 Node *signresult = NULL; 1863 if (ConditionalMoveLimit != 0) { 1864 signresult = _gvn.transform( CMoveNode::make(C, NULL, bol3, absxpowy, negabsxpowy, Type::DOUBLE)); 1865 } else { 1866 IfNode *ifyeven = create_and_xform_if(ylong_path,bol3, PROB_FAIR, COUNT_UNKNOWN); 1867 RegionNode *r = new (C) RegionNode(3); 1868 Node *phi = new (C) PhiNode(r, Type::DOUBLE); 1869 r->init_req(1, _gvn.transform(new (C) IfFalseNode(ifyeven))); 1870 r->init_req(2, _gvn.transform(new (C) IfTrueNode(ifyeven))); 1871 phi->init_req(1, absxpowy); 1872 phi->init_req(2, negabsxpowy); 1873 signresult = _gvn.transform(phi); 1874 ylong_path = _gvn.transform(r); 1875 record_for_igvn(r); 1876 } 1877 // Set complex path fast result 1878 r->init_req(2, ylong_path); 1879 phi->init_req(2, signresult); 1880 1881 static const jlong nan_bits = CONST64(0x7ff8000000000000); 1882 Node *slow_result = makecon(TypeD::make(*(double*)&nan_bits)); // return NaN 1883 r->init_req(1,slow_path); 1884 phi->init_req(1,slow_result); 1885 1886 // Post merge 1887 set_control(_gvn.transform(r)); 1888 record_for_igvn(r); 1889 result = _gvn.transform(phi); 1890 } 1891 1892 finish_pow_exp(result, x, y, OptoRuntime::Math_DD_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dpow), "POW"); 1893 1894 C->set_has_split_ifs(true); // Has chance for split-if optimization 1895 return true; 1896 } 1897 1898 //------------------------------runtime_math----------------------------- 1899 bool LibraryCallKit::runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName) { 1900 assert(call_type == OptoRuntime::Math_DD_D_Type() || call_type == OptoRuntime::Math_D_D_Type(), 1901 "must be (DD)D or (D)D type"); 1902 1903 // Inputs 1904 Node* a = round_double_node(argument(0)); 1905 Node* b = (call_type == OptoRuntime::Math_DD_D_Type()) ? round_double_node(argument(2)) : NULL; 1906 1907 const TypePtr* no_memory_effects = NULL; 1908 Node* trig = make_runtime_call(RC_LEAF, call_type, funcAddr, funcName, 1909 no_memory_effects, 1910 a, top(), b, b ? top() : NULL); 1911 Node* value = _gvn.transform(new (C) ProjNode(trig, TypeFunc::Parms+0)); 1912 #ifdef ASSERT 1913 Node* value_top = _gvn.transform(new (C) ProjNode(trig, TypeFunc::Parms+1)); 1914 assert(value_top == top(), "second value must be top"); 1915 #endif 1916 1917 set_result(value); 1918 return true; 1919 } 1920 1921 //------------------------------inline_math_native----------------------------- 1922 bool LibraryCallKit::inline_math_native(vmIntrinsics::ID id) { 1923 #define FN_PTR(f) CAST_FROM_FN_PTR(address, f) 1924 switch (id) { 1925 // These intrinsics are not properly supported on all hardware 1926 case vmIntrinsics::_dcos: return Matcher::has_match_rule(Op_CosD) ? inline_trig(id) : 1927 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dcos), "COS"); 1928 case vmIntrinsics::_dsin: return Matcher::has_match_rule(Op_SinD) ? inline_trig(id) : 1929 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dsin), "SIN"); 1930 case vmIntrinsics::_dtan: return Matcher::has_match_rule(Op_TanD) ? inline_trig(id) : 1931 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dtan), "TAN"); 1932 1933 case vmIntrinsics::_dlog: return Matcher::has_match_rule(Op_LogD) ? inline_math(id) : 1934 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dlog), "LOG"); 1935 case vmIntrinsics::_dlog10: return Matcher::has_match_rule(Op_Log10D) ? inline_math(id) : 1936 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dlog10), "LOG10"); 1937 1938 // These intrinsics are supported on all hardware 1939 case vmIntrinsics::_dsqrt: return Matcher::has_match_rule(Op_SqrtD) ? inline_math(id) : false; 1940 case vmIntrinsics::_dabs: return Matcher::has_match_rule(Op_AbsD) ? inline_math(id) : false; 1941 1942 case vmIntrinsics::_dexp: return Matcher::has_match_rule(Op_ExpD) ? inline_exp() : 1943 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dexp), "EXP"); 1944 case vmIntrinsics::_dpow: return Matcher::has_match_rule(Op_PowD) ? inline_pow() : 1945 runtime_math(OptoRuntime::Math_DD_D_Type(), FN_PTR(SharedRuntime::dpow), "POW"); 1946 #undef FN_PTR 1947 1948 // These intrinsics are not yet correctly implemented 1949 case vmIntrinsics::_datan2: 1950 return false; 1951 1952 default: 1953 fatal_unexpected_iid(id); 1954 return false; 1955 } 1956 } 1957 1958 static bool is_simple_name(Node* n) { 1959 return (n->req() == 1 // constant 1960 || (n->is_Type() && n->as_Type()->type()->singleton()) 1961 || n->is_Proj() // parameter or return value 1962 || n->is_Phi() // local of some sort 1963 ); 1964 } 1965 1966 //----------------------------inline_min_max----------------------------------- 1967 bool LibraryCallKit::inline_min_max(vmIntrinsics::ID id) { 1968 set_result(generate_min_max(id, argument(0), argument(1))); 1969 return true; 1970 } 1971 1972 void LibraryCallKit::inline_math_mathExact(Node* math) { 1973 // If we didn't get the expected opcode it means we have optimized 1974 // the node to something else and don't need the exception edge. 1975 if (!math->is_MathExact()) { 1976 set_result(math); 1977 return; 1978 } 1979 1980 Node* result = _gvn.transform( new(C) ProjNode(math, MathExactNode::result_proj_node)); 1981 Node* flags = _gvn.transform( new(C) FlagsProjNode(math, MathExactNode::flags_proj_node)); 1982 1983 Node* bol = _gvn.transform( new (C) BoolNode(flags, BoolTest::overflow) ); 1984 IfNode* check = create_and_map_if(control(), bol, PROB_UNLIKELY_MAG(3), COUNT_UNKNOWN); 1985 Node* fast_path = _gvn.transform( new (C) IfFalseNode(check)); 1986 Node* slow_path = _gvn.transform( new (C) IfTrueNode(check) ); 1987 1988 { 1989 PreserveJVMState pjvms(this); 1990 PreserveReexecuteState preexecs(this); 1991 jvms()->set_should_reexecute(true); 1992 1993 set_control(slow_path); 1994 set_i_o(i_o()); 1995 1996 uncommon_trap(Deoptimization::Reason_intrinsic, 1997 Deoptimization::Action_none); 1998 } 1999 2000 set_control(fast_path); 2001 set_result(result); 2002 } 2003 2004 bool LibraryCallKit::inline_math_addExactI(bool is_increment) { 2005 Node* arg1 = argument(0); 2006 Node* arg2 = NULL; 2007 2008 if (is_increment) { 2009 arg2 = intcon(1); 2010 } else { 2011 arg2 = argument(1); 2012 } 2013 2014 Node* add = _gvn.transform( new(C) AddExactINode(NULL, arg1, arg2) ); 2015 inline_math_mathExact(add); 2016 return true; 2017 } 2018 2019 bool LibraryCallKit::inline_math_addExactL(bool is_increment) { 2020 Node* arg1 = argument(0); // type long 2021 // argument(1) == TOP 2022 Node* arg2 = NULL; 2023 2024 if (is_increment) { 2025 arg2 = longcon(1); 2026 } else { 2027 arg2 = argument(2); // type long 2028 // argument(3) == TOP 2029 } 2030 2031 Node* add = _gvn.transform(new(C) AddExactLNode(NULL, arg1, arg2)); 2032 inline_math_mathExact(add); 2033 return true; 2034 } 2035 2036 bool LibraryCallKit::inline_math_subtractExactI(bool is_decrement) { 2037 Node* arg1 = argument(0); 2038 Node* arg2 = NULL; 2039 2040 if (is_decrement) { 2041 arg2 = intcon(1); 2042 } else { 2043 arg2 = argument(1); 2044 } 2045 2046 Node* sub = _gvn.transform(new(C) SubExactINode(NULL, arg1, arg2)); 2047 inline_math_mathExact(sub); 2048 return true; 2049 } 2050 2051 bool LibraryCallKit::inline_math_subtractExactL(bool is_decrement) { 2052 Node* arg1 = argument(0); // type long 2053 // argument(1) == TOP 2054 Node* arg2 = NULL; 2055 2056 if (is_decrement) { 2057 arg2 = longcon(1); 2058 } else { 2059 Node* arg2 = argument(2); // type long 2060 // argument(3) == TOP 2061 } 2062 2063 Node* sub = _gvn.transform(new(C) SubExactLNode(NULL, arg1, arg2)); 2064 inline_math_mathExact(sub); 2065 return true; 2066 } 2067 2068 bool LibraryCallKit::inline_math_negateExactI() { 2069 Node* arg1 = argument(0); 2070 2071 Node* neg = _gvn.transform(new(C) NegExactINode(NULL, arg1)); 2072 inline_math_mathExact(neg); 2073 return true; 2074 } 2075 2076 bool LibraryCallKit::inline_math_negateExactL() { 2077 Node* arg1 = argument(0); 2078 // argument(1) == TOP 2079 2080 Node* neg = _gvn.transform(new(C) NegExactLNode(NULL, arg1)); 2081 inline_math_mathExact(neg); 2082 return true; 2083 } 2084 2085 bool LibraryCallKit::inline_math_multiplyExactI() { 2086 Node* arg1 = argument(0); 2087 Node* arg2 = argument(1); 2088 2089 Node* mul = _gvn.transform(new(C) MulExactINode(NULL, arg1, arg2)); 2090 inline_math_mathExact(mul); 2091 return true; 2092 } 2093 2094 bool LibraryCallKit::inline_math_multiplyExactL() { 2095 Node* arg1 = argument(0); 2096 // argument(1) == TOP 2097 Node* arg2 = argument(2); 2098 // argument(3) == TOP 2099 2100 Node* mul = _gvn.transform(new(C) MulExactLNode(NULL, arg1, arg2)); 2101 inline_math_mathExact(mul); 2102 return true; 2103 } 2104 2105 Node* 2106 LibraryCallKit::generate_min_max(vmIntrinsics::ID id, Node* x0, Node* y0) { 2107 // These are the candidate return value: 2108 Node* xvalue = x0; 2109 Node* yvalue = y0; 2110 2111 if (xvalue == yvalue) { 2112 return xvalue; 2113 } 2114 2115 bool want_max = (id == vmIntrinsics::_max); 2116 2117 const TypeInt* txvalue = _gvn.type(xvalue)->isa_int(); 2118 const TypeInt* tyvalue = _gvn.type(yvalue)->isa_int(); 2119 if (txvalue == NULL || tyvalue == NULL) return top(); 2120 // This is not really necessary, but it is consistent with a 2121 // hypothetical MaxINode::Value method: 2122 int widen = MAX2(txvalue->_widen, tyvalue->_widen); 2123 2124 // %%% This folding logic should (ideally) be in a different place. 2125 // Some should be inside IfNode, and there to be a more reliable 2126 // transformation of ?: style patterns into cmoves. We also want 2127 // more powerful optimizations around cmove and min/max. 2128 2129 // Try to find a dominating comparison of these guys. 2130 // It can simplify the index computation for Arrays.copyOf 2131 // and similar uses of System.arraycopy. 2132 // First, compute the normalized version of CmpI(x, y). 2133 int cmp_op = Op_CmpI; 2134 Node* xkey = xvalue; 2135 Node* ykey = yvalue; 2136 Node* ideal_cmpxy = _gvn.transform(new(C) CmpINode(xkey, ykey)); 2137 if (ideal_cmpxy->is_Cmp()) { 2138 // E.g., if we have CmpI(length - offset, count), 2139 // it might idealize to CmpI(length, count + offset) 2140 cmp_op = ideal_cmpxy->Opcode(); 2141 xkey = ideal_cmpxy->in(1); 2142 ykey = ideal_cmpxy->in(2); 2143 } 2144 2145 // Start by locating any relevant comparisons. 2146 Node* start_from = (xkey->outcnt() < ykey->outcnt()) ? xkey : ykey; 2147 Node* cmpxy = NULL; 2148 Node* cmpyx = NULL; 2149 for (DUIterator_Fast kmax, k = start_from->fast_outs(kmax); k < kmax; k++) { 2150 Node* cmp = start_from->fast_out(k); 2151 if (cmp->outcnt() > 0 && // must have prior uses 2152 cmp->in(0) == NULL && // must be context-independent 2153 cmp->Opcode() == cmp_op) { // right kind of compare 2154 if (cmp->in(1) == xkey && cmp->in(2) == ykey) cmpxy = cmp; 2155 if (cmp->in(1) == ykey && cmp->in(2) == xkey) cmpyx = cmp; 2156 } 2157 } 2158 2159 const int NCMPS = 2; 2160 Node* cmps[NCMPS] = { cmpxy, cmpyx }; 2161 int cmpn; 2162 for (cmpn = 0; cmpn < NCMPS; cmpn++) { 2163 if (cmps[cmpn] != NULL) break; // find a result 2164 } 2165 if (cmpn < NCMPS) { 2166 // Look for a dominating test that tells us the min and max. 2167 int depth = 0; // Limit search depth for speed 2168 Node* dom = control(); 2169 for (; dom != NULL; dom = IfNode::up_one_dom(dom, true)) { 2170 if (++depth >= 100) break; 2171 Node* ifproj = dom; 2172 if (!ifproj->is_Proj()) continue; 2173 Node* iff = ifproj->in(0); 2174 if (!iff->is_If()) continue; 2175 Node* bol = iff->in(1); 2176 if (!bol->is_Bool()) continue; 2177 Node* cmp = bol->in(1); 2178 if (cmp == NULL) continue; 2179 for (cmpn = 0; cmpn < NCMPS; cmpn++) 2180 if (cmps[cmpn] == cmp) break; 2181 if (cmpn == NCMPS) continue; 2182 BoolTest::mask btest = bol->as_Bool()->_test._test; 2183 if (ifproj->is_IfFalse()) btest = BoolTest(btest).negate(); 2184 if (cmp->in(1) == ykey) btest = BoolTest(btest).commute(); 2185 // At this point, we know that 'x btest y' is true. 2186 switch (btest) { 2187 case BoolTest::eq: 2188 // They are proven equal, so we can collapse the min/max. 2189 // Either value is the answer. Choose the simpler. 2190 if (is_simple_name(yvalue) && !is_simple_name(xvalue)) 2191 return yvalue; 2192 return xvalue; 2193 case BoolTest::lt: // x < y 2194 case BoolTest::le: // x <= y 2195 return (want_max ? yvalue : xvalue); 2196 case BoolTest::gt: // x > y 2197 case BoolTest::ge: // x >= y 2198 return (want_max ? xvalue : yvalue); 2199 } 2200 } 2201 } 2202 2203 // We failed to find a dominating test. 2204 // Let's pick a test that might GVN with prior tests. 2205 Node* best_bol = NULL; 2206 BoolTest::mask best_btest = BoolTest::illegal; 2207 for (cmpn = 0; cmpn < NCMPS; cmpn++) { 2208 Node* cmp = cmps[cmpn]; 2209 if (cmp == NULL) continue; 2210 for (DUIterator_Fast jmax, j = cmp->fast_outs(jmax); j < jmax; j++) { 2211 Node* bol = cmp->fast_out(j); 2212 if (!bol->is_Bool()) continue; 2213 BoolTest::mask btest = bol->as_Bool()->_test._test; 2214 if (btest == BoolTest::eq || btest == BoolTest::ne) continue; 2215 if (cmp->in(1) == ykey) btest = BoolTest(btest).commute(); 2216 if (bol->outcnt() > (best_bol == NULL ? 0 : best_bol->outcnt())) { 2217 best_bol = bol->as_Bool(); 2218 best_btest = btest; 2219 } 2220 } 2221 } 2222 2223 Node* answer_if_true = NULL; 2224 Node* answer_if_false = NULL; 2225 switch (best_btest) { 2226 default: 2227 if (cmpxy == NULL) 2228 cmpxy = ideal_cmpxy; 2229 best_bol = _gvn.transform(new(C) BoolNode(cmpxy, BoolTest::lt)); 2230 // and fall through: 2231 case BoolTest::lt: // x < y 2232 case BoolTest::le: // x <= y 2233 answer_if_true = (want_max ? yvalue : xvalue); 2234 answer_if_false = (want_max ? xvalue : yvalue); 2235 break; 2236 case BoolTest::gt: // x > y 2237 case BoolTest::ge: // x >= y 2238 answer_if_true = (want_max ? xvalue : yvalue); 2239 answer_if_false = (want_max ? yvalue : xvalue); 2240 break; 2241 } 2242 2243 jint hi, lo; 2244 if (want_max) { 2245 // We can sharpen the minimum. 2246 hi = MAX2(txvalue->_hi, tyvalue->_hi); 2247 lo = MAX2(txvalue->_lo, tyvalue->_lo); 2248 } else { 2249 // We can sharpen the maximum. 2250 hi = MIN2(txvalue->_hi, tyvalue->_hi); 2251 lo = MIN2(txvalue->_lo, tyvalue->_lo); 2252 } 2253 2254 // Use a flow-free graph structure, to avoid creating excess control edges 2255 // which could hinder other optimizations. 2256 // Since Math.min/max is often used with arraycopy, we want 2257 // tightly_coupled_allocation to be able to see beyond min/max expressions. 2258 Node* cmov = CMoveNode::make(C, NULL, best_bol, 2259 answer_if_false, answer_if_true, 2260 TypeInt::make(lo, hi, widen)); 2261 2262 return _gvn.transform(cmov); 2263 2264 /* 2265 // This is not as desirable as it may seem, since Min and Max 2266 // nodes do not have a full set of optimizations. 2267 // And they would interfere, anyway, with 'if' optimizations 2268 // and with CMoveI canonical forms. 2269 switch (id) { 2270 case vmIntrinsics::_min: 2271 result_val = _gvn.transform(new (C, 3) MinINode(x,y)); break; 2272 case vmIntrinsics::_max: 2273 result_val = _gvn.transform(new (C, 3) MaxINode(x,y)); break; 2274 default: 2275 ShouldNotReachHere(); 2276 } 2277 */ 2278 } 2279 2280 inline int 2281 LibraryCallKit::classify_unsafe_addr(Node* &base, Node* &offset) { 2282 const TypePtr* base_type = TypePtr::NULL_PTR; 2283 if (base != NULL) base_type = _gvn.type(base)->isa_ptr(); 2284 if (base_type == NULL) { 2285 // Unknown type. 2286 return Type::AnyPtr; 2287 } else if (base_type == TypePtr::NULL_PTR) { 2288 // Since this is a NULL+long form, we have to switch to a rawptr. 2289 base = _gvn.transform(new (C) CastX2PNode(offset)); 2290 offset = MakeConX(0); 2291 return Type::RawPtr; 2292 } else if (base_type->base() == Type::RawPtr) { 2293 return Type::RawPtr; 2294 } else if (base_type->isa_oopptr()) { 2295 // Base is never null => always a heap address. 2296 if (base_type->ptr() == TypePtr::NotNull) { 2297 return Type::OopPtr; 2298 } 2299 // Offset is small => always a heap address. 2300 const TypeX* offset_type = _gvn.type(offset)->isa_intptr_t(); 2301 if (offset_type != NULL && 2302 base_type->offset() == 0 && // (should always be?) 2303 offset_type->_lo >= 0 && 2304 !MacroAssembler::needs_explicit_null_check(offset_type->_hi)) { 2305 return Type::OopPtr; 2306 } 2307 // Otherwise, it might either be oop+off or NULL+addr. 2308 return Type::AnyPtr; 2309 } else { 2310 // No information: 2311 return Type::AnyPtr; 2312 } 2313 } 2314 2315 inline Node* LibraryCallKit::make_unsafe_address(Node* base, Node* offset) { 2316 int kind = classify_unsafe_addr(base, offset); 2317 if (kind == Type::RawPtr) { 2318 return basic_plus_adr(top(), base, offset); 2319 } else { 2320 return basic_plus_adr(base, offset); 2321 } 2322 } 2323 2324 //--------------------------inline_number_methods----------------------------- 2325 // inline int Integer.numberOfLeadingZeros(int) 2326 // inline int Long.numberOfLeadingZeros(long) 2327 // 2328 // inline int Integer.numberOfTrailingZeros(int) 2329 // inline int Long.numberOfTrailingZeros(long) 2330 // 2331 // inline int Integer.bitCount(int) 2332 // inline int Long.bitCount(long) 2333 // 2334 // inline char Character.reverseBytes(char) 2335 // inline short Short.reverseBytes(short) 2336 // inline int Integer.reverseBytes(int) 2337 // inline long Long.reverseBytes(long) 2338 bool LibraryCallKit::inline_number_methods(vmIntrinsics::ID id) { 2339 Node* arg = argument(0); 2340 Node* n; 2341 switch (id) { 2342 case vmIntrinsics::_numberOfLeadingZeros_i: n = new (C) CountLeadingZerosINode( arg); break; 2343 case vmIntrinsics::_numberOfLeadingZeros_l: n = new (C) CountLeadingZerosLNode( arg); break; 2344 case vmIntrinsics::_numberOfTrailingZeros_i: n = new (C) CountTrailingZerosINode(arg); break; 2345 case vmIntrinsics::_numberOfTrailingZeros_l: n = new (C) CountTrailingZerosLNode(arg); break; 2346 case vmIntrinsics::_bitCount_i: n = new (C) PopCountINode( arg); break; 2347 case vmIntrinsics::_bitCount_l: n = new (C) PopCountLNode( arg); break; 2348 case vmIntrinsics::_reverseBytes_c: n = new (C) ReverseBytesUSNode(0, arg); break; 2349 case vmIntrinsics::_reverseBytes_s: n = new (C) ReverseBytesSNode( 0, arg); break; 2350 case vmIntrinsics::_reverseBytes_i: n = new (C) ReverseBytesINode( 0, arg); break; 2351 case vmIntrinsics::_reverseBytes_l: n = new (C) ReverseBytesLNode( 0, arg); break; 2352 default: fatal_unexpected_iid(id); break; 2353 } 2354 set_result(_gvn.transform(n)); 2355 return true; 2356 } 2357 2358 //----------------------------inline_unsafe_access---------------------------- 2359 2360 const static BasicType T_ADDRESS_HOLDER = T_LONG; 2361 2362 // Helper that guards and inserts a pre-barrier. 2363 void LibraryCallKit::insert_pre_barrier(Node* base_oop, Node* offset, 2364 Node* pre_val, bool need_mem_bar) { 2365 // We could be accessing the referent field of a reference object. If so, when G1 2366 // is enabled, we need to log the value in the referent field in an SATB buffer. 2367 // This routine performs some compile time filters and generates suitable 2368 // runtime filters that guard the pre-barrier code. 2369 // Also add memory barrier for non volatile load from the referent field 2370 // to prevent commoning of loads across safepoint. 2371 if (!UseG1GC && !need_mem_bar) 2372 return; 2373 2374 // Some compile time checks. 2375 2376 // If offset is a constant, is it java_lang_ref_Reference::_reference_offset? 2377 const TypeX* otype = offset->find_intptr_t_type(); 2378 if (otype != NULL && otype->is_con() && 2379 otype->get_con() != java_lang_ref_Reference::referent_offset) { 2380 // Constant offset but not the reference_offset so just return 2381 return; 2382 } 2383 2384 // We only need to generate the runtime guards for instances. 2385 const TypeOopPtr* btype = base_oop->bottom_type()->isa_oopptr(); 2386 if (btype != NULL) { 2387 if (btype->isa_aryptr()) { 2388 // Array type so nothing to do 2389 return; 2390 } 2391 2392 const TypeInstPtr* itype = btype->isa_instptr(); 2393 if (itype != NULL) { 2394 // Can the klass of base_oop be statically determined to be 2395 // _not_ a sub-class of Reference and _not_ Object? 2396 ciKlass* klass = itype->klass(); 2397 if ( klass->is_loaded() && 2398 !klass->is_subtype_of(env()->Reference_klass()) && 2399 !env()->Object_klass()->is_subtype_of(klass)) { 2400 return; 2401 } 2402 } 2403 } 2404 2405 // The compile time filters did not reject base_oop/offset so 2406 // we need to generate the following runtime filters 2407 // 2408 // if (offset == java_lang_ref_Reference::_reference_offset) { 2409 // if (instance_of(base, java.lang.ref.Reference)) { 2410 // pre_barrier(_, pre_val, ...); 2411 // } 2412 // } 2413 2414 float likely = PROB_LIKELY( 0.999); 2415 float unlikely = PROB_UNLIKELY(0.999); 2416 2417 IdealKit ideal(this); 2418 #define __ ideal. 2419 2420 Node* referent_off = __ ConX(java_lang_ref_Reference::referent_offset); 2421 2422 __ if_then(offset, BoolTest::eq, referent_off, unlikely); { 2423 // Update graphKit memory and control from IdealKit. 2424 sync_kit(ideal); 2425 2426 Node* ref_klass_con = makecon(TypeKlassPtr::make(env()->Reference_klass())); 2427 Node* is_instof = gen_instanceof(base_oop, ref_klass_con); 2428 2429 // Update IdealKit memory and control from graphKit. 2430 __ sync_kit(this); 2431 2432 Node* one = __ ConI(1); 2433 // is_instof == 0 if base_oop == NULL 2434 __ if_then(is_instof, BoolTest::eq, one, unlikely); { 2435 2436 // Update graphKit from IdeakKit. 2437 sync_kit(ideal); 2438 2439 // Use the pre-barrier to record the value in the referent field 2440 pre_barrier(false /* do_load */, 2441 __ ctrl(), 2442 NULL /* obj */, NULL /* adr */, max_juint /* alias_idx */, NULL /* val */, NULL /* val_type */, 2443 pre_val /* pre_val */, 2444 T_OBJECT); 2445 if (need_mem_bar) { 2446 // Add memory barrier to prevent commoning reads from this field 2447 // across safepoint since GC can change its value. 2448 insert_mem_bar(Op_MemBarCPUOrder); 2449 } 2450 // Update IdealKit from graphKit. 2451 __ sync_kit(this); 2452 2453 } __ end_if(); // _ref_type != ref_none 2454 } __ end_if(); // offset == referent_offset 2455 2456 // Final sync IdealKit and GraphKit. 2457 final_sync(ideal); 2458 #undef __ 2459 } 2460 2461 2462 // Interpret Unsafe.fieldOffset cookies correctly: 2463 extern jlong Unsafe_field_offset_to_byte_offset(jlong field_offset); 2464 2465 const TypeOopPtr* LibraryCallKit::sharpen_unsafe_type(Compile::AliasType* alias_type, const TypePtr *adr_type, bool is_native_ptr) { 2466 // Attempt to infer a sharper value type from the offset and base type. 2467 ciKlass* sharpened_klass = NULL; 2468 2469 // See if it is an instance field, with an object type. 2470 if (alias_type->field() != NULL) { 2471 assert(!is_native_ptr, "native pointer op cannot use a java address"); 2472 if (alias_type->field()->type()->is_klass()) { 2473 sharpened_klass = alias_type->field()->type()->as_klass(); 2474 } 2475 } 2476 2477 // See if it is a narrow oop array. 2478 if (adr_type->isa_aryptr()) { 2479 if (adr_type->offset() >= objArrayOopDesc::base_offset_in_bytes()) { 2480 const TypeOopPtr *elem_type = adr_type->is_aryptr()->elem()->isa_oopptr(); 2481 if (elem_type != NULL) { 2482 sharpened_klass = elem_type->klass(); 2483 } 2484 } 2485 } 2486 2487 // The sharpened class might be unloaded if there is no class loader 2488 // contraint in place. 2489 if (sharpened_klass != NULL && sharpened_klass->is_loaded()) { 2490 const TypeOopPtr* tjp = TypeOopPtr::make_from_klass(sharpened_klass); 2491 2492 #ifndef PRODUCT 2493 if (C->print_intrinsics() || C->print_inlining()) { 2494 tty->print(" from base type: "); adr_type->dump(); 2495 tty->print(" sharpened value: "); tjp->dump(); 2496 } 2497 #endif 2498 // Sharpen the value type. 2499 return tjp; 2500 } 2501 return NULL; 2502 } 2503 2504 bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile) { 2505 if (callee()->is_static()) return false; // caller must have the capability! 2506 2507 #ifndef PRODUCT 2508 { 2509 ResourceMark rm; 2510 // Check the signatures. 2511 ciSignature* sig = callee()->signature(); 2512 #ifdef ASSERT 2513 if (!is_store) { 2514 // Object getObject(Object base, int/long offset), etc. 2515 BasicType rtype = sig->return_type()->basic_type(); 2516 if (rtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::getAddress_name()) 2517 rtype = T_ADDRESS; // it is really a C void* 2518 assert(rtype == type, "getter must return the expected value"); 2519 if (!is_native_ptr) { 2520 assert(sig->count() == 2, "oop getter has 2 arguments"); 2521 assert(sig->type_at(0)->basic_type() == T_OBJECT, "getter base is object"); 2522 assert(sig->type_at(1)->basic_type() == T_LONG, "getter offset is correct"); 2523 } else { 2524 assert(sig->count() == 1, "native getter has 1 argument"); 2525 assert(sig->type_at(0)->basic_type() == T_LONG, "getter base is long"); 2526 } 2527 } else { 2528 // void putObject(Object base, int/long offset, Object x), etc. 2529 assert(sig->return_type()->basic_type() == T_VOID, "putter must not return a value"); 2530 if (!is_native_ptr) { 2531 assert(sig->count() == 3, "oop putter has 3 arguments"); 2532 assert(sig->type_at(0)->basic_type() == T_OBJECT, "putter base is object"); 2533 assert(sig->type_at(1)->basic_type() == T_LONG, "putter offset is correct"); 2534 } else { 2535 assert(sig->count() == 2, "native putter has 2 arguments"); 2536 assert(sig->type_at(0)->basic_type() == T_LONG, "putter base is long"); 2537 } 2538 BasicType vtype = sig->type_at(sig->count()-1)->basic_type(); 2539 if (vtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::putAddress_name()) 2540 vtype = T_ADDRESS; // it is really a C void* 2541 assert(vtype == type, "putter must accept the expected value"); 2542 } 2543 #endif // ASSERT 2544 } 2545 #endif //PRODUCT 2546 2547 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". 2548 2549 Node* receiver = argument(0); // type: oop 2550 2551 // Build address expression. See the code in inline_unsafe_prefetch. 2552 Node* adr; 2553 Node* heap_base_oop = top(); 2554 Node* offset = top(); 2555 Node* val; 2556 2557 if (!is_native_ptr) { 2558 // The base is either a Java object or a value produced by Unsafe.staticFieldBase 2559 Node* base = argument(1); // type: oop 2560 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset 2561 offset = argument(2); // type: long 2562 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset 2563 // to be plain byte offsets, which are also the same as those accepted 2564 // by oopDesc::field_base. 2565 assert(Unsafe_field_offset_to_byte_offset(11) == 11, 2566 "fieldOffset must be byte-scaled"); 2567 // 32-bit machines ignore the high half! 2568 offset = ConvL2X(offset); 2569 adr = make_unsafe_address(base, offset); 2570 heap_base_oop = base; 2571 val = is_store ? argument(4) : NULL; 2572 } else { 2573 Node* ptr = argument(1); // type: long 2574 ptr = ConvL2X(ptr); // adjust Java long to machine word 2575 adr = make_unsafe_address(NULL, ptr); 2576 val = is_store ? argument(3) : NULL; 2577 } 2578 2579 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); 2580 2581 // First guess at the value type. 2582 const Type *value_type = Type::get_const_basic_type(type); 2583 2584 // Try to categorize the address. If it comes up as TypeJavaPtr::BOTTOM, 2585 // there was not enough information to nail it down. 2586 Compile::AliasType* alias_type = C->alias_type(adr_type); 2587 assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here"); 2588 2589 // We will need memory barriers unless we can determine a unique 2590 // alias category for this reference. (Note: If for some reason 2591 // the barriers get omitted and the unsafe reference begins to "pollute" 2592 // the alias analysis of the rest of the graph, either Compile::can_alias 2593 // or Compile::must_alias will throw a diagnostic assert.) 2594 bool need_mem_bar = (alias_type->adr_type() == TypeOopPtr::BOTTOM); 2595 2596 // If we are reading the value of the referent field of a Reference 2597 // object (either by using Unsafe directly or through reflection) 2598 // then, if G1 is enabled, we need to record the referent in an 2599 // SATB log buffer using the pre-barrier mechanism. 2600 // Also we need to add memory barrier to prevent commoning reads 2601 // from this field across safepoint since GC can change its value. 2602 bool need_read_barrier = !is_native_ptr && !is_store && 2603 offset != top() && heap_base_oop != top(); 2604 2605 if (!is_store && type == T_OBJECT) { 2606 const TypeOopPtr* tjp = sharpen_unsafe_type(alias_type, adr_type, is_native_ptr); 2607 if (tjp != NULL) { 2608 value_type = tjp; 2609 } 2610 } 2611 2612 receiver = null_check(receiver); 2613 if (stopped()) { 2614 return true; 2615 } 2616 // Heap pointers get a null-check from the interpreter, 2617 // as a courtesy. However, this is not guaranteed by Unsafe, 2618 // and it is not possible to fully distinguish unintended nulls 2619 // from intended ones in this API. 2620 2621 if (is_volatile) { 2622 // We need to emit leading and trailing CPU membars (see below) in 2623 // addition to memory membars when is_volatile. This is a little 2624 // too strong, but avoids the need to insert per-alias-type 2625 // volatile membars (for stores; compare Parse::do_put_xxx), which 2626 // we cannot do effectively here because we probably only have a 2627 // rough approximation of type. 2628 need_mem_bar = true; 2629 // For Stores, place a memory ordering barrier now. 2630 if (is_store) 2631 insert_mem_bar(Op_MemBarRelease); 2632 } 2633 2634 // Memory barrier to prevent normal and 'unsafe' accesses from 2635 // bypassing each other. Happens after null checks, so the 2636 // exception paths do not take memory state from the memory barrier, 2637 // so there's no problems making a strong assert about mixing users 2638 // of safe & unsafe memory. Otherwise fails in a CTW of rt.jar 2639 // around 5701, class sun/reflect/UnsafeBooleanFieldAccessorImpl. 2640 if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder); 2641 2642 if (!is_store) { 2643 Node* p = make_load(control(), adr, value_type, type, adr_type, is_volatile); 2644 // load value 2645 switch (type) { 2646 case T_BOOLEAN: 2647 case T_CHAR: 2648 case T_BYTE: 2649 case T_SHORT: 2650 case T_INT: 2651 case T_LONG: 2652 case T_FLOAT: 2653 case T_DOUBLE: 2654 break; 2655 case T_OBJECT: 2656 if (need_read_barrier) { 2657 insert_pre_barrier(heap_base_oop, offset, p, !(is_volatile || need_mem_bar)); 2658 } 2659 break; 2660 case T_ADDRESS: 2661 // Cast to an int type. 2662 p = _gvn.transform(new (C) CastP2XNode(NULL, p)); 2663 p = ConvX2L(p); 2664 break; 2665 default: 2666 fatal(err_msg_res("unexpected type %d: %s", type, type2name(type))); 2667 break; 2668 } 2669 // The load node has the control of the preceding MemBarCPUOrder. All 2670 // following nodes will have the control of the MemBarCPUOrder inserted at 2671 // the end of this method. So, pushing the load onto the stack at a later 2672 // point is fine. 2673 set_result(p); 2674 } else { 2675 // place effect of store into memory 2676 switch (type) { 2677 case T_DOUBLE: 2678 val = dstore_rounding(val); 2679 break; 2680 case T_ADDRESS: 2681 // Repackage the long as a pointer. 2682 val = ConvL2X(val); 2683 val = _gvn.transform(new (C) CastX2PNode(val)); 2684 break; 2685 } 2686 2687 if (type != T_OBJECT ) { 2688 (void) store_to_memory(control(), adr, val, type, adr_type, is_volatile); 2689 } else { 2690 // Possibly an oop being stored to Java heap or native memory 2691 if (!TypePtr::NULL_PTR->higher_equal(_gvn.type(heap_base_oop))) { 2692 // oop to Java heap. 2693 (void) store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type); 2694 } else { 2695 // We can't tell at compile time if we are storing in the Java heap or outside 2696 // of it. So we need to emit code to conditionally do the proper type of 2697 // store. 2698 2699 IdealKit ideal(this); 2700 #define __ ideal. 2701 // QQQ who knows what probability is here?? 2702 __ if_then(heap_base_oop, BoolTest::ne, null(), PROB_UNLIKELY(0.999)); { 2703 // Sync IdealKit and graphKit. 2704 sync_kit(ideal); 2705 Node* st = store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type); 2706 // Update IdealKit memory. 2707 __ sync_kit(this); 2708 } __ else_(); { 2709 __ store(__ ctrl(), adr, val, type, alias_type->index(), is_volatile); 2710 } __ end_if(); 2711 // Final sync IdealKit and GraphKit. 2712 final_sync(ideal); 2713 #undef __ 2714 } 2715 } 2716 } 2717 2718 if (is_volatile) { 2719 if (!is_store) 2720 insert_mem_bar(Op_MemBarAcquire); 2721 else 2722 insert_mem_bar(Op_MemBarVolatile); 2723 } 2724 2725 if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder); 2726 2727 return true; 2728 } 2729 2730 //----------------------------inline_unsafe_prefetch---------------------------- 2731 2732 bool LibraryCallKit::inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static) { 2733 #ifndef PRODUCT 2734 { 2735 ResourceMark rm; 2736 // Check the signatures. 2737 ciSignature* sig = callee()->signature(); 2738 #ifdef ASSERT 2739 // Object getObject(Object base, int/long offset), etc. 2740 BasicType rtype = sig->return_type()->basic_type(); 2741 if (!is_native_ptr) { 2742 assert(sig->count() == 2, "oop prefetch has 2 arguments"); 2743 assert(sig->type_at(0)->basic_type() == T_OBJECT, "prefetch base is object"); 2744 assert(sig->type_at(1)->basic_type() == T_LONG, "prefetcha offset is correct"); 2745 } else { 2746 assert(sig->count() == 1, "native prefetch has 1 argument"); 2747 assert(sig->type_at(0)->basic_type() == T_LONG, "prefetch base is long"); 2748 } 2749 #endif // ASSERT 2750 } 2751 #endif // !PRODUCT 2752 2753 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". 2754 2755 const int idx = is_static ? 0 : 1; 2756 if (!is_static) { 2757 null_check_receiver(); 2758 if (stopped()) { 2759 return true; 2760 } 2761 } 2762 2763 // Build address expression. See the code in inline_unsafe_access. 2764 Node *adr; 2765 if (!is_native_ptr) { 2766 // The base is either a Java object or a value produced by Unsafe.staticFieldBase 2767 Node* base = argument(idx + 0); // type: oop 2768 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset 2769 Node* offset = argument(idx + 1); // type: long 2770 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset 2771 // to be plain byte offsets, which are also the same as those accepted 2772 // by oopDesc::field_base. 2773 assert(Unsafe_field_offset_to_byte_offset(11) == 11, 2774 "fieldOffset must be byte-scaled"); 2775 // 32-bit machines ignore the high half! 2776 offset = ConvL2X(offset); 2777 adr = make_unsafe_address(base, offset); 2778 } else { 2779 Node* ptr = argument(idx + 0); // type: long 2780 ptr = ConvL2X(ptr); // adjust Java long to machine word 2781 adr = make_unsafe_address(NULL, ptr); 2782 } 2783 2784 // Generate the read or write prefetch 2785 Node *prefetch; 2786 if (is_store) { 2787 prefetch = new (C) PrefetchWriteNode(i_o(), adr); 2788 } else { 2789 prefetch = new (C) PrefetchReadNode(i_o(), adr); 2790 } 2791 prefetch->init_req(0, control()); 2792 set_i_o(_gvn.transform(prefetch)); 2793 2794 return true; 2795 } 2796 2797 //----------------------------inline_unsafe_load_store---------------------------- 2798 // This method serves a couple of different customers (depending on LoadStoreKind): 2799 // 2800 // LS_cmpxchg: 2801 // public final native boolean compareAndSwapObject(Object o, long offset, Object expected, Object x); 2802 // public final native boolean compareAndSwapInt( Object o, long offset, int expected, int x); 2803 // public final native boolean compareAndSwapLong( Object o, long offset, long expected, long x); 2804 // 2805 // LS_xadd: 2806 // public int getAndAddInt( Object o, long offset, int delta) 2807 // public long getAndAddLong(Object o, long offset, long delta) 2808 // 2809 // LS_xchg: 2810 // int getAndSet(Object o, long offset, int newValue) 2811 // long getAndSet(Object o, long offset, long newValue) 2812 // Object getAndSet(Object o, long offset, Object newValue) 2813 // 2814 bool LibraryCallKit::inline_unsafe_load_store(BasicType type, LoadStoreKind kind) { 2815 // This basic scheme here is the same as inline_unsafe_access, but 2816 // differs in enough details that combining them would make the code 2817 // overly confusing. (This is a true fact! I originally combined 2818 // them, but even I was confused by it!) As much code/comments as 2819 // possible are retained from inline_unsafe_access though to make 2820 // the correspondences clearer. - dl 2821 2822 if (callee()->is_static()) return false; // caller must have the capability! 2823 2824 #ifndef PRODUCT 2825 BasicType rtype; 2826 { 2827 ResourceMark rm; 2828 // Check the signatures. 2829 ciSignature* sig = callee()->signature(); 2830 rtype = sig->return_type()->basic_type(); 2831 if (kind == LS_xadd || kind == LS_xchg) { 2832 // Check the signatures. 2833 #ifdef ASSERT 2834 assert(rtype == type, "get and set must return the expected type"); 2835 assert(sig->count() == 3, "get and set has 3 arguments"); 2836 assert(sig->type_at(0)->basic_type() == T_OBJECT, "get and set base is object"); 2837 assert(sig->type_at(1)->basic_type() == T_LONG, "get and set offset is long"); 2838 assert(sig->type_at(2)->basic_type() == type, "get and set must take expected type as new value/delta"); 2839 #endif // ASSERT 2840 } else if (kind == LS_cmpxchg) { 2841 // Check the signatures. 2842 #ifdef ASSERT 2843 assert(rtype == T_BOOLEAN, "CAS must return boolean"); 2844 assert(sig->count() == 4, "CAS has 4 arguments"); 2845 assert(sig->type_at(0)->basic_type() == T_OBJECT, "CAS base is object"); 2846 assert(sig->type_at(1)->basic_type() == T_LONG, "CAS offset is long"); 2847 #endif // ASSERT 2848 } else { 2849 ShouldNotReachHere(); 2850 } 2851 } 2852 #endif //PRODUCT 2853 2854 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". 2855 2856 // Get arguments: 2857 Node* receiver = NULL; 2858 Node* base = NULL; 2859 Node* offset = NULL; 2860 Node* oldval = NULL; 2861 Node* newval = NULL; 2862 if (kind == LS_cmpxchg) { 2863 const bool two_slot_type = type2size[type] == 2; 2864 receiver = argument(0); // type: oop 2865 base = argument(1); // type: oop 2866 offset = argument(2); // type: long 2867 oldval = argument(4); // type: oop, int, or long 2868 newval = argument(two_slot_type ? 6 : 5); // type: oop, int, or long 2869 } else if (kind == LS_xadd || kind == LS_xchg){ 2870 receiver = argument(0); // type: oop 2871 base = argument(1); // type: oop 2872 offset = argument(2); // type: long 2873 oldval = NULL; 2874 newval = argument(4); // type: oop, int, or long 2875 } 2876 2877 // Null check receiver. 2878 receiver = null_check(receiver); 2879 if (stopped()) { 2880 return true; 2881 } 2882 2883 // Build field offset expression. 2884 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset 2885 // to be plain byte offsets, which are also the same as those accepted 2886 // by oopDesc::field_base. 2887 assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled"); 2888 // 32-bit machines ignore the high half of long offsets 2889 offset = ConvL2X(offset); 2890 Node* adr = make_unsafe_address(base, offset); 2891 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); 2892 2893 // For CAS, unlike inline_unsafe_access, there seems no point in 2894 // trying to refine types. Just use the coarse types here. 2895 const Type *value_type = Type::get_const_basic_type(type); 2896 Compile::AliasType* alias_type = C->alias_type(adr_type); 2897 assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here"); 2898 2899 if (kind == LS_xchg && type == T_OBJECT) { 2900 const TypeOopPtr* tjp = sharpen_unsafe_type(alias_type, adr_type); 2901 if (tjp != NULL) { 2902 value_type = tjp; 2903 } 2904 } 2905 2906 int alias_idx = C->get_alias_index(adr_type); 2907 2908 // Memory-model-wise, a LoadStore acts like a little synchronized 2909 // block, so needs barriers on each side. These don't translate 2910 // into actual barriers on most machines, but we still need rest of 2911 // compiler to respect ordering. 2912 2913 insert_mem_bar(Op_MemBarRelease); 2914 insert_mem_bar(Op_MemBarCPUOrder); 2915 2916 // 4984716: MemBars must be inserted before this 2917 // memory node in order to avoid a false 2918 // dependency which will confuse the scheduler. 2919 Node *mem = memory(alias_idx); 2920 2921 // For now, we handle only those cases that actually exist: ints, 2922 // longs, and Object. Adding others should be straightforward. 2923 Node* load_store; 2924 switch(type) { 2925 case T_INT: 2926 if (kind == LS_xadd) { 2927 load_store = _gvn.transform(new (C) GetAndAddINode(control(), mem, adr, newval, adr_type)); 2928 } else if (kind == LS_xchg) { 2929 load_store = _gvn.transform(new (C) GetAndSetINode(control(), mem, adr, newval, adr_type)); 2930 } else if (kind == LS_cmpxchg) { 2931 load_store = _gvn.transform(new (C) CompareAndSwapINode(control(), mem, adr, newval, oldval)); 2932 } else { 2933 ShouldNotReachHere(); 2934 } 2935 break; 2936 case T_LONG: 2937 if (kind == LS_xadd) { 2938 load_store = _gvn.transform(new (C) GetAndAddLNode(control(), mem, adr, newval, adr_type)); 2939 } else if (kind == LS_xchg) { 2940 load_store = _gvn.transform(new (C) GetAndSetLNode(control(), mem, adr, newval, adr_type)); 2941 } else if (kind == LS_cmpxchg) { 2942 load_store = _gvn.transform(new (C) CompareAndSwapLNode(control(), mem, adr, newval, oldval)); 2943 } else { 2944 ShouldNotReachHere(); 2945 } 2946 break; 2947 case T_OBJECT: 2948 // Transformation of a value which could be NULL pointer (CastPP #NULL) 2949 // could be delayed during Parse (for example, in adjust_map_after_if()). 2950 // Execute transformation here to avoid barrier generation in such case. 2951 if (_gvn.type(newval) == TypePtr::NULL_PTR) 2952 newval = _gvn.makecon(TypePtr::NULL_PTR); 2953 2954 // Reference stores need a store barrier. 2955 if (kind == LS_xchg) { 2956 // If pre-barrier must execute before the oop store, old value will require do_load here. 2957 if (!can_move_pre_barrier()) { 2958 pre_barrier(true /* do_load*/, 2959 control(), base, adr, alias_idx, newval, value_type->make_oopptr(), 2960 NULL /* pre_val*/, 2961 T_OBJECT); 2962 } // Else move pre_barrier to use load_store value, see below. 2963 } else if (kind == LS_cmpxchg) { 2964 // Same as for newval above: 2965 if (_gvn.type(oldval) == TypePtr::NULL_PTR) { 2966 oldval = _gvn.makecon(TypePtr::NULL_PTR); 2967 } 2968 // The only known value which might get overwritten is oldval. 2969 pre_barrier(false /* do_load */, 2970 control(), NULL, NULL, max_juint, NULL, NULL, 2971 oldval /* pre_val */, 2972 T_OBJECT); 2973 } else { 2974 ShouldNotReachHere(); 2975 } 2976 2977 #ifdef _LP64 2978 if (adr->bottom_type()->is_ptr_to_narrowoop()) { 2979 Node *newval_enc = _gvn.transform(new (C) EncodePNode(newval, newval->bottom_type()->make_narrowoop())); 2980 if (kind == LS_xchg) { 2981 load_store = _gvn.transform(new (C) GetAndSetNNode(control(), mem, adr, 2982 newval_enc, adr_type, value_type->make_narrowoop())); 2983 } else { 2984 assert(kind == LS_cmpxchg, "wrong LoadStore operation"); 2985 Node *oldval_enc = _gvn.transform(new (C) EncodePNode(oldval, oldval->bottom_type()->make_narrowoop())); 2986 load_store = _gvn.transform(new (C) CompareAndSwapNNode(control(), mem, adr, 2987 newval_enc, oldval_enc)); 2988 } 2989 } else 2990 #endif 2991 { 2992 if (kind == LS_xchg) { 2993 load_store = _gvn.transform(new (C) GetAndSetPNode(control(), mem, adr, newval, adr_type, value_type->is_oopptr())); 2994 } else { 2995 assert(kind == LS_cmpxchg, "wrong LoadStore operation"); 2996 load_store = _gvn.transform(new (C) CompareAndSwapPNode(control(), mem, adr, newval, oldval)); 2997 } 2998 } 2999 post_barrier(control(), load_store, base, adr, alias_idx, newval, T_OBJECT, true); 3000 break; 3001 default: 3002 fatal(err_msg_res("unexpected type %d: %s", type, type2name(type))); 3003 break; 3004 } 3005 3006 // SCMemProjNodes represent the memory state of a LoadStore. Their 3007 // main role is to prevent LoadStore nodes from being optimized away 3008 // when their results aren't used. 3009 Node* proj = _gvn.transform(new (C) SCMemProjNode(load_store)); 3010 set_memory(proj, alias_idx); 3011 3012 if (type == T_OBJECT && kind == LS_xchg) { 3013 #ifdef _LP64 3014 if (adr->bottom_type()->is_ptr_to_narrowoop()) { 3015 load_store = _gvn.transform(new (C) DecodeNNode(load_store, load_store->get_ptr_type())); 3016 } 3017 #endif 3018 if (can_move_pre_barrier()) { 3019 // Don't need to load pre_val. The old value is returned by load_store. 3020 // The pre_barrier can execute after the xchg as long as no safepoint 3021 // gets inserted between them. 3022 pre_barrier(false /* do_load */, 3023 control(), NULL, NULL, max_juint, NULL, NULL, 3024 load_store /* pre_val */, 3025 T_OBJECT); 3026 } 3027 } 3028 3029 // Add the trailing membar surrounding the access 3030 insert_mem_bar(Op_MemBarCPUOrder); 3031 insert_mem_bar(Op_MemBarAcquire); 3032 3033 assert(type2size[load_store->bottom_type()->basic_type()] == type2size[rtype], "result type should match"); 3034 set_result(load_store); 3035 return true; 3036 } 3037 3038 //----------------------------inline_unsafe_ordered_store---------------------- 3039 // public native void sun.misc.Unsafe.putOrderedObject(Object o, long offset, Object x); 3040 // public native void sun.misc.Unsafe.putOrderedInt(Object o, long offset, int x); 3041 // public native void sun.misc.Unsafe.putOrderedLong(Object o, long offset, long x); 3042 bool LibraryCallKit::inline_unsafe_ordered_store(BasicType type) { 3043 // This is another variant of inline_unsafe_access, differing in 3044 // that it always issues store-store ("release") barrier and ensures 3045 // store-atomicity (which only matters for "long"). 3046 3047 if (callee()->is_static()) return false; // caller must have the capability! 3048 3049 #ifndef PRODUCT 3050 { 3051 ResourceMark rm; 3052 // Check the signatures. 3053 ciSignature* sig = callee()->signature(); 3054 #ifdef ASSERT 3055 BasicType rtype = sig->return_type()->basic_type(); 3056 assert(rtype == T_VOID, "must return void"); 3057 assert(sig->count() == 3, "has 3 arguments"); 3058 assert(sig->type_at(0)->basic_type() == T_OBJECT, "base is object"); 3059 assert(sig->type_at(1)->basic_type() == T_LONG, "offset is long"); 3060 #endif // ASSERT 3061 } 3062 #endif //PRODUCT 3063 3064 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". 3065 3066 // Get arguments: 3067 Node* receiver = argument(0); // type: oop 3068 Node* base = argument(1); // type: oop 3069 Node* offset = argument(2); // type: long 3070 Node* val = argument(4); // type: oop, int, or long 3071 3072 // Null check receiver. 3073 receiver = null_check(receiver); 3074 if (stopped()) { 3075 return true; 3076 } 3077 3078 // Build field offset expression. 3079 assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled"); 3080 // 32-bit machines ignore the high half of long offsets 3081 offset = ConvL2X(offset); 3082 Node* adr = make_unsafe_address(base, offset); 3083 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); 3084 const Type *value_type = Type::get_const_basic_type(type); 3085 Compile::AliasType* alias_type = C->alias_type(adr_type); 3086 3087 insert_mem_bar(Op_MemBarRelease); 3088 insert_mem_bar(Op_MemBarCPUOrder); 3089 // Ensure that the store is atomic for longs: 3090 const bool require_atomic_access = true; 3091 Node* store; 3092 if (type == T_OBJECT) // reference stores need a store barrier. 3093 store = store_oop_to_unknown(control(), base, adr, adr_type, val, type); 3094 else { 3095 store = store_to_memory(control(), adr, val, type, adr_type, require_atomic_access); 3096 } 3097 insert_mem_bar(Op_MemBarCPUOrder); 3098 return true; 3099 } 3100 3101 bool LibraryCallKit::inline_unsafe_fence(vmIntrinsics::ID id) { 3102 // Regardless of form, don't allow previous ld/st to move down, 3103 // then issue acquire, release, or volatile mem_bar. 3104 insert_mem_bar(Op_MemBarCPUOrder); 3105 switch(id) { 3106 case vmIntrinsics::_loadFence: 3107 insert_mem_bar(Op_MemBarAcquire); 3108 return true; 3109 case vmIntrinsics::_storeFence: 3110 insert_mem_bar(Op_MemBarRelease); 3111 return true; 3112 case vmIntrinsics::_fullFence: 3113 insert_mem_bar(Op_MemBarVolatile); 3114 return true; 3115 default: 3116 fatal_unexpected_iid(id); 3117 return false; 3118 } 3119 } 3120 3121 bool LibraryCallKit::klass_needs_init_guard(Node* kls) { 3122 if (!kls->is_Con()) { 3123 return true; 3124 } 3125 const TypeKlassPtr* klsptr = kls->bottom_type()->isa_klassptr(); 3126 if (klsptr == NULL) { 3127 return true; 3128 } 3129 ciInstanceKlass* ik = klsptr->klass()->as_instance_klass(); 3130 // don't need a guard for a klass that is already initialized 3131 return !ik->is_initialized(); 3132 } 3133 3134 //----------------------------inline_unsafe_allocate--------------------------- 3135 // public native Object sun.misc.Unsafe.allocateInstance(Class<?> cls); 3136 bool LibraryCallKit::inline_unsafe_allocate() { 3137 if (callee()->is_static()) return false; // caller must have the capability! 3138 3139 null_check_receiver(); // null-check, then ignore 3140 Node* cls = null_check(argument(1)); 3141 if (stopped()) return true; 3142 3143 Node* kls = load_klass_from_mirror(cls, false, NULL, 0); 3144 kls = null_check(kls); 3145 if (stopped()) return true; // argument was like int.class 3146 3147 Node* test = NULL; 3148 if (LibraryCallKit::klass_needs_init_guard(kls)) { 3149 // Note: The argument might still be an illegal value like 3150 // Serializable.class or Object[].class. The runtime will handle it. 3151 // But we must make an explicit check for initialization. 3152 Node* insp = basic_plus_adr(kls, in_bytes(InstanceKlass::init_state_offset())); 3153 // Use T_BOOLEAN for InstanceKlass::_init_state so the compiler 3154 // can generate code to load it as unsigned byte. 3155 Node* inst = make_load(NULL, insp, TypeInt::UBYTE, T_BOOLEAN); 3156 Node* bits = intcon(InstanceKlass::fully_initialized); 3157 test = _gvn.transform(new (C) SubINode(inst, bits)); 3158 // The 'test' is non-zero if we need to take a slow path. 3159 } 3160 3161 Node* obj = new_instance(kls, test); 3162 set_result(obj); 3163 return true; 3164 } 3165 3166 #ifdef TRACE_HAVE_INTRINSICS 3167 /* 3168 * oop -> myklass 3169 * myklass->trace_id |= USED 3170 * return myklass->trace_id & ~0x3 3171 */ 3172 bool LibraryCallKit::inline_native_classID() { 3173 null_check_receiver(); // null-check, then ignore 3174 Node* cls = null_check(argument(1), T_OBJECT); 3175 Node* kls = load_klass_from_mirror(cls, false, NULL, 0); 3176 kls = null_check(kls, T_OBJECT); 3177 ByteSize offset = TRACE_ID_OFFSET; 3178 Node* insp = basic_plus_adr(kls, in_bytes(offset)); 3179 Node* tvalue = make_load(NULL, insp, TypeLong::LONG, T_LONG); 3180 Node* bits = longcon(~0x03l); // ignore bit 0 & 1 3181 Node* andl = _gvn.transform(new (C) AndLNode(tvalue, bits)); 3182 Node* clsused = longcon(0x01l); // set the class bit 3183 Node* orl = _gvn.transform(new (C) OrLNode(tvalue, clsused)); 3184 3185 const TypePtr *adr_type = _gvn.type(insp)->isa_ptr(); 3186 store_to_memory(control(), insp, orl, T_LONG, adr_type); 3187 set_result(andl); 3188 return true; 3189 } 3190 3191 bool LibraryCallKit::inline_native_threadID() { 3192 Node* tls_ptr = NULL; 3193 Node* cur_thr = generate_current_thread(tls_ptr); 3194 Node* p = basic_plus_adr(top()/*!oop*/, tls_ptr, in_bytes(JavaThread::osthread_offset())); 3195 Node* osthread = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS); 3196 p = basic_plus_adr(top()/*!oop*/, osthread, in_bytes(OSThread::thread_id_offset())); 3197 3198 Node* threadid = NULL; 3199 size_t thread_id_size = OSThread::thread_id_size(); 3200 if (thread_id_size == (size_t) BytesPerLong) { 3201 threadid = ConvL2I(make_load(control(), p, TypeLong::LONG, T_LONG)); 3202 } else if (thread_id_size == (size_t) BytesPerInt) { 3203 threadid = make_load(control(), p, TypeInt::INT, T_INT); 3204 } else { 3205 ShouldNotReachHere(); 3206 } 3207 set_result(threadid); 3208 return true; 3209 } 3210 #endif 3211 3212 //------------------------inline_native_time_funcs-------------- 3213 // inline code for System.currentTimeMillis() and System.nanoTime() 3214 // these have the same type and signature 3215 bool LibraryCallKit::inline_native_time_funcs(address funcAddr, const char* funcName) { 3216 const TypeFunc* tf = OptoRuntime::void_long_Type(); 3217 const TypePtr* no_memory_effects = NULL; 3218 Node* time = make_runtime_call(RC_LEAF, tf, funcAddr, funcName, no_memory_effects); 3219 Node* value = _gvn.transform(new (C) ProjNode(time, TypeFunc::Parms+0)); 3220 #ifdef ASSERT 3221 Node* value_top = _gvn.transform(new (C) ProjNode(time, TypeFunc::Parms+1)); 3222 assert(value_top == top(), "second value must be top"); 3223 #endif 3224 set_result(value); 3225 return true; 3226 } 3227 3228 //------------------------inline_native_currentThread------------------ 3229 bool LibraryCallKit::inline_native_currentThread() { 3230 Node* junk = NULL; 3231 set_result(generate_current_thread(junk)); 3232 return true; 3233 } 3234 3235 //------------------------inline_native_isInterrupted------------------ 3236 // private native boolean java.lang.Thread.isInterrupted(boolean ClearInterrupted); 3237 bool LibraryCallKit::inline_native_isInterrupted() { 3238 // Add a fast path to t.isInterrupted(clear_int): 3239 // (t == Thread.current() && (!TLS._osthread._interrupted || !clear_int)) 3240 // ? TLS._osthread._interrupted : /*slow path:*/ t.isInterrupted(clear_int) 3241 // So, in the common case that the interrupt bit is false, 3242 // we avoid making a call into the VM. Even if the interrupt bit 3243 // is true, if the clear_int argument is false, we avoid the VM call. 3244 // However, if the receiver is not currentThread, we must call the VM, 3245 // because there must be some locking done around the operation. 3246 3247 // We only go to the fast case code if we pass two guards. 3248 // Paths which do not pass are accumulated in the slow_region. 3249 3250 enum { 3251 no_int_result_path = 1, // t == Thread.current() && !TLS._osthread._interrupted 3252 no_clear_result_path = 2, // t == Thread.current() && TLS._osthread._interrupted && !clear_int 3253 slow_result_path = 3, // slow path: t.isInterrupted(clear_int) 3254 PATH_LIMIT 3255 }; 3256 3257 // Ensure that it's not possible to move the load of TLS._osthread._interrupted flag 3258 // out of the function. 3259 insert_mem_bar(Op_MemBarCPUOrder); 3260 3261 RegionNode* result_rgn = new (C) RegionNode(PATH_LIMIT); 3262 PhiNode* result_val = new (C) PhiNode(result_rgn, TypeInt::BOOL); 3263 3264 RegionNode* slow_region = new (C) RegionNode(1); 3265 record_for_igvn(slow_region); 3266 3267 // (a) Receiving thread must be the current thread. 3268 Node* rec_thr = argument(0); 3269 Node* tls_ptr = NULL; 3270 Node* cur_thr = generate_current_thread(tls_ptr); 3271 Node* cmp_thr = _gvn.transform(new (C) CmpPNode(cur_thr, rec_thr)); 3272 Node* bol_thr = _gvn.transform(new (C) BoolNode(cmp_thr, BoolTest::ne)); 3273 3274 generate_slow_guard(bol_thr, slow_region); 3275 3276 // (b) Interrupt bit on TLS must be false. 3277 Node* p = basic_plus_adr(top()/*!oop*/, tls_ptr, in_bytes(JavaThread::osthread_offset())); 3278 Node* osthread = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS); 3279 p = basic_plus_adr(top()/*!oop*/, osthread, in_bytes(OSThread::interrupted_offset())); 3280 3281 // Set the control input on the field _interrupted read to prevent it floating up. 3282 Node* int_bit = make_load(control(), p, TypeInt::BOOL, T_INT); 3283 Node* cmp_bit = _gvn.transform(new (C) CmpINode(int_bit, intcon(0))); 3284 Node* bol_bit = _gvn.transform(new (C) BoolNode(cmp_bit, BoolTest::ne)); 3285 3286 IfNode* iff_bit = create_and_map_if(control(), bol_bit, PROB_UNLIKELY_MAG(3), COUNT_UNKNOWN); 3287 3288 // First fast path: if (!TLS._interrupted) return false; 3289 Node* false_bit = _gvn.transform(new (C) IfFalseNode(iff_bit)); 3290 result_rgn->init_req(no_int_result_path, false_bit); 3291 result_val->init_req(no_int_result_path, intcon(0)); 3292 3293 // drop through to next case 3294 set_control( _gvn.transform(new (C) IfTrueNode(iff_bit))); 3295 3296 // (c) Or, if interrupt bit is set and clear_int is false, use 2nd fast path. 3297 Node* clr_arg = argument(1); 3298 Node* cmp_arg = _gvn.transform(new (C) CmpINode(clr_arg, intcon(0))); 3299 Node* bol_arg = _gvn.transform(new (C) BoolNode(cmp_arg, BoolTest::ne)); 3300 IfNode* iff_arg = create_and_map_if(control(), bol_arg, PROB_FAIR, COUNT_UNKNOWN); 3301 3302 // Second fast path: ... else if (!clear_int) return true; 3303 Node* false_arg = _gvn.transform(new (C) IfFalseNode(iff_arg)); 3304 result_rgn->init_req(no_clear_result_path, false_arg); 3305 result_val->init_req(no_clear_result_path, intcon(1)); 3306 3307 // drop through to next case 3308 set_control( _gvn.transform(new (C) IfTrueNode(iff_arg))); 3309 3310 // (d) Otherwise, go to the slow path. 3311 slow_region->add_req(control()); 3312 set_control( _gvn.transform(slow_region)); 3313 3314 if (stopped()) { 3315 // There is no slow path. 3316 result_rgn->init_req(slow_result_path, top()); 3317 result_val->init_req(slow_result_path, top()); 3318 } else { 3319 // non-virtual because it is a private non-static 3320 CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_isInterrupted); 3321 3322 Node* slow_val = set_results_for_java_call(slow_call); 3323 // this->control() comes from set_results_for_java_call 3324 3325 Node* fast_io = slow_call->in(TypeFunc::I_O); 3326 Node* fast_mem = slow_call->in(TypeFunc::Memory); 3327 3328 // These two phis are pre-filled with copies of of the fast IO and Memory 3329 PhiNode* result_mem = PhiNode::make(result_rgn, fast_mem, Type::MEMORY, TypePtr::BOTTOM); 3330 PhiNode* result_io = PhiNode::make(result_rgn, fast_io, Type::ABIO); 3331 3332 result_rgn->init_req(slow_result_path, control()); 3333 result_io ->init_req(slow_result_path, i_o()); 3334 result_mem->init_req(slow_result_path, reset_memory()); 3335 result_val->init_req(slow_result_path, slow_val); 3336 3337 set_all_memory(_gvn.transform(result_mem)); 3338 set_i_o( _gvn.transform(result_io)); 3339 } 3340 3341 C->set_has_split_ifs(true); // Has chance for split-if optimization 3342 set_result(result_rgn, result_val); 3343 return true; 3344 } 3345 3346 //---------------------------load_mirror_from_klass---------------------------- 3347 // Given a klass oop, load its java mirror (a java.lang.Class oop). 3348 Node* LibraryCallKit::load_mirror_from_klass(Node* klass) { 3349 Node* p = basic_plus_adr(klass, in_bytes(Klass::java_mirror_offset())); 3350 return make_load(NULL, p, TypeInstPtr::MIRROR, T_OBJECT); 3351 } 3352 3353 //-----------------------load_klass_from_mirror_common------------------------- 3354 // Given a java mirror (a java.lang.Class oop), load its corresponding klass oop. 3355 // Test the klass oop for null (signifying a primitive Class like Integer.TYPE), 3356 // and branch to the given path on the region. 3357 // If never_see_null, take an uncommon trap on null, so we can optimistically 3358 // compile for the non-null case. 3359 // If the region is NULL, force never_see_null = true. 3360 Node* LibraryCallKit::load_klass_from_mirror_common(Node* mirror, 3361 bool never_see_null, 3362 RegionNode* region, 3363 int null_path, 3364 int offset) { 3365 if (region == NULL) never_see_null = true; 3366 Node* p = basic_plus_adr(mirror, offset); 3367 const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL; 3368 Node* kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, kls_type)); 3369 Node* null_ctl = top(); 3370 kls = null_check_oop(kls, &null_ctl, never_see_null); 3371 if (region != NULL) { 3372 // Set region->in(null_path) if the mirror is a primitive (e.g, int.class). 3373 region->init_req(null_path, null_ctl); 3374 } else { 3375 assert(null_ctl == top(), "no loose ends"); 3376 } 3377 return kls; 3378 } 3379 3380 //--------------------(inline_native_Class_query helpers)--------------------- 3381 // Use this for JVM_ACC_INTERFACE, JVM_ACC_IS_CLONEABLE, JVM_ACC_HAS_FINALIZER. 3382 // Fall through if (mods & mask) == bits, take the guard otherwise. 3383 Node* LibraryCallKit::generate_access_flags_guard(Node* kls, int modifier_mask, int modifier_bits, RegionNode* region) { 3384 // Branch around if the given klass has the given modifier bit set. 3385 // Like generate_guard, adds a new path onto the region. 3386 Node* modp = basic_plus_adr(kls, in_bytes(Klass::access_flags_offset())); 3387 Node* mods = make_load(NULL, modp, TypeInt::INT, T_INT); 3388 Node* mask = intcon(modifier_mask); 3389 Node* bits = intcon(modifier_bits); 3390 Node* mbit = _gvn.transform(new (C) AndINode(mods, mask)); 3391 Node* cmp = _gvn.transform(new (C) CmpINode(mbit, bits)); 3392 Node* bol = _gvn.transform(new (C) BoolNode(cmp, BoolTest::ne)); 3393 return generate_fair_guard(bol, region); 3394 } 3395 Node* LibraryCallKit::generate_interface_guard(Node* kls, RegionNode* region) { 3396 return generate_access_flags_guard(kls, JVM_ACC_INTERFACE, 0, region); 3397 } 3398 3399 //-------------------------inline_native_Class_query------------------- 3400 bool LibraryCallKit::inline_native_Class_query(vmIntrinsics::ID id) { 3401 const Type* return_type = TypeInt::BOOL; 3402 Node* prim_return_value = top(); // what happens if it's a primitive class? 3403 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); 3404 bool expect_prim = false; // most of these guys expect to work on refs 3405 3406 enum { _normal_path = 1, _prim_path = 2, PATH_LIMIT }; 3407 3408 Node* mirror = argument(0); 3409 Node* obj = top(); 3410 3411 switch (id) { 3412 case vmIntrinsics::_isInstance: 3413 // nothing is an instance of a primitive type 3414 prim_return_value = intcon(0); 3415 obj = argument(1); 3416 break; 3417 case vmIntrinsics::_getModifiers: 3418 prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 3419 assert(is_power_of_2((int)JVM_ACC_WRITTEN_FLAGS+1), "change next line"); 3420 return_type = TypeInt::make(0, JVM_ACC_WRITTEN_FLAGS, Type::WidenMin); 3421 break; 3422 case vmIntrinsics::_isInterface: 3423 prim_return_value = intcon(0); 3424 break; 3425 case vmIntrinsics::_isArray: 3426 prim_return_value = intcon(0); 3427 expect_prim = true; // cf. ObjectStreamClass.getClassSignature 3428 break; 3429 case vmIntrinsics::_isPrimitive: 3430 prim_return_value = intcon(1); 3431 expect_prim = true; // obviously 3432 break; 3433 case vmIntrinsics::_getSuperclass: 3434 prim_return_value = null(); 3435 return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR); 3436 break; 3437 case vmIntrinsics::_getComponentType: 3438 prim_return_value = null(); 3439 return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR); 3440 break; 3441 case vmIntrinsics::_getClassAccessFlags: 3442 prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 3443 return_type = TypeInt::INT; // not bool! 6297094 3444 break; 3445 default: 3446 fatal_unexpected_iid(id); 3447 break; 3448 } 3449 3450 const TypeInstPtr* mirror_con = _gvn.type(mirror)->isa_instptr(); 3451 if (mirror_con == NULL) return false; // cannot happen? 3452 3453 #ifndef PRODUCT 3454 if (C->print_intrinsics() || C->print_inlining()) { 3455 ciType* k = mirror_con->java_mirror_type(); 3456 if (k) { 3457 tty->print("Inlining %s on constant Class ", vmIntrinsics::name_at(intrinsic_id())); 3458 k->print_name(); 3459 tty->cr(); 3460 } 3461 } 3462 #endif 3463 3464 // Null-check the mirror, and the mirror's klass ptr (in case it is a primitive). 3465 RegionNode* region = new (C) RegionNode(PATH_LIMIT); 3466 record_for_igvn(region); 3467 PhiNode* phi = new (C) PhiNode(region, return_type); 3468 3469 // The mirror will never be null of Reflection.getClassAccessFlags, however 3470 // it may be null for Class.isInstance or Class.getModifiers. Throw a NPE 3471 // if it is. See bug 4774291. 3472 3473 // For Reflection.getClassAccessFlags(), the null check occurs in 3474 // the wrong place; see inline_unsafe_access(), above, for a similar 3475 // situation. 3476 mirror = null_check(mirror); 3477 // If mirror or obj is dead, only null-path is taken. 3478 if (stopped()) return true; 3479 3480 if (expect_prim) never_see_null = false; // expect nulls (meaning prims) 3481 3482 // Now load the mirror's klass metaobject, and null-check it. 3483 // Side-effects region with the control path if the klass is null. 3484 Node* kls = load_klass_from_mirror(mirror, never_see_null, region, _prim_path); 3485 // If kls is null, we have a primitive mirror. 3486 phi->init_req(_prim_path, prim_return_value); 3487 if (stopped()) { set_result(region, phi); return true; } 3488 3489 Node* p; // handy temp 3490 Node* null_ctl; 3491 3492 // Now that we have the non-null klass, we can perform the real query. 3493 // For constant classes, the query will constant-fold in LoadNode::Value. 3494 Node* query_value = top(); 3495 switch (id) { 3496 case vmIntrinsics::_isInstance: 3497 // nothing is an instance of a primitive type 3498 query_value = gen_instanceof(obj, kls); 3499 break; 3500 3501 case vmIntrinsics::_getModifiers: 3502 p = basic_plus_adr(kls, in_bytes(Klass::modifier_flags_offset())); 3503 query_value = make_load(NULL, p, TypeInt::INT, T_INT); 3504 break; 3505 3506 case vmIntrinsics::_isInterface: 3507 // (To verify this code sequence, check the asserts in JVM_IsInterface.) 3508 if (generate_interface_guard(kls, region) != NULL) 3509 // A guard was added. If the guard is taken, it was an interface. 3510 phi->add_req(intcon(1)); 3511 // If we fall through, it's a plain class. 3512 query_value = intcon(0); 3513 break; 3514 3515 case vmIntrinsics::_isArray: 3516 // (To verify this code sequence, check the asserts in JVM_IsArrayClass.) 3517 if (generate_array_guard(kls, region) != NULL) 3518 // A guard was added. If the guard is taken, it was an array. 3519 phi->add_req(intcon(1)); 3520 // If we fall through, it's a plain class. 3521 query_value = intcon(0); 3522 break; 3523 3524 case vmIntrinsics::_isPrimitive: 3525 query_value = intcon(0); // "normal" path produces false 3526 break; 3527 3528 case vmIntrinsics::_getSuperclass: 3529 // The rules here are somewhat unfortunate, but we can still do better 3530 // with random logic than with a JNI call. 3531 // Interfaces store null or Object as _super, but must report null. 3532 // Arrays store an intermediate super as _super, but must report Object. 3533 // Other types can report the actual _super. 3534 // (To verify this code sequence, check the asserts in JVM_IsInterface.) 3535 if (generate_interface_guard(kls, region) != NULL) 3536 // A guard was added. If the guard is taken, it was an interface. 3537 phi->add_req(null()); 3538 if (generate_array_guard(kls, region) != NULL) 3539 // A guard was added. If the guard is taken, it was an array. 3540 phi->add_req(makecon(TypeInstPtr::make(env()->Object_klass()->java_mirror()))); 3541 // If we fall through, it's a plain class. Get its _super. 3542 p = basic_plus_adr(kls, in_bytes(Klass::super_offset())); 3543 kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, TypeKlassPtr::OBJECT_OR_NULL)); 3544 null_ctl = top(); 3545 kls = null_check_oop(kls, &null_ctl); 3546 if (null_ctl != top()) { 3547 // If the guard is taken, Object.superClass is null (both klass and mirror). 3548 region->add_req(null_ctl); 3549 phi ->add_req(null()); 3550 } 3551 if (!stopped()) { 3552 query_value = load_mirror_from_klass(kls); 3553 } 3554 break; 3555 3556 case vmIntrinsics::_getComponentType: 3557 if (generate_array_guard(kls, region) != NULL) { 3558 // Be sure to pin the oop load to the guard edge just created: 3559 Node* is_array_ctrl = region->in(region->req()-1); 3560 Node* cma = basic_plus_adr(kls, in_bytes(ArrayKlass::component_mirror_offset())); 3561 Node* cmo = make_load(is_array_ctrl, cma, TypeInstPtr::MIRROR, T_OBJECT); 3562 phi->add_req(cmo); 3563 } 3564 query_value = null(); // non-array case is null 3565 break; 3566 3567 case vmIntrinsics::_getClassAccessFlags: 3568 p = basic_plus_adr(kls, in_bytes(Klass::access_flags_offset())); 3569 query_value = make_load(NULL, p, TypeInt::INT, T_INT); 3570 break; 3571 3572 default: 3573 fatal_unexpected_iid(id); 3574 break; 3575 } 3576 3577 // Fall-through is the normal case of a query to a real class. 3578 phi->init_req(1, query_value); 3579 region->init_req(1, control()); 3580 3581 C->set_has_split_ifs(true); // Has chance for split-if optimization 3582 set_result(region, phi); 3583 return true; 3584 } 3585 3586 //--------------------------inline_native_subtype_check------------------------ 3587 // This intrinsic takes the JNI calls out of the heart of 3588 // UnsafeFieldAccessorImpl.set, which improves Field.set, readObject, etc. 3589 bool LibraryCallKit::inline_native_subtype_check() { 3590 // Pull both arguments off the stack. 3591 Node* args[2]; // two java.lang.Class mirrors: superc, subc 3592 args[0] = argument(0); 3593 args[1] = argument(1); 3594 Node* klasses[2]; // corresponding Klasses: superk, subk 3595 klasses[0] = klasses[1] = top(); 3596 3597 enum { 3598 // A full decision tree on {superc is prim, subc is prim}: 3599 _prim_0_path = 1, // {P,N} => false 3600 // {P,P} & superc!=subc => false 3601 _prim_same_path, // {P,P} & superc==subc => true 3602 _prim_1_path, // {N,P} => false 3603 _ref_subtype_path, // {N,N} & subtype check wins => true 3604 _both_ref_path, // {N,N} & subtype check loses => false 3605 PATH_LIMIT 3606 }; 3607 3608 RegionNode* region = new (C) RegionNode(PATH_LIMIT); 3609 Node* phi = new (C) PhiNode(region, TypeInt::BOOL); 3610 record_for_igvn(region); 3611 3612 const TypePtr* adr_type = TypeRawPtr::BOTTOM; // memory type of loads 3613 const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL; 3614 int class_klass_offset = java_lang_Class::klass_offset_in_bytes(); 3615 3616 // First null-check both mirrors and load each mirror's klass metaobject. 3617 int which_arg; 3618 for (which_arg = 0; which_arg <= 1; which_arg++) { 3619 Node* arg = args[which_arg]; 3620 arg = null_check(arg); 3621 if (stopped()) break; 3622 args[which_arg] = arg; 3623 3624 Node* p = basic_plus_adr(arg, class_klass_offset); 3625 Node* kls = LoadKlassNode::make(_gvn, immutable_memory(), p, adr_type, kls_type); 3626 klasses[which_arg] = _gvn.transform(kls); 3627 } 3628 3629 // Having loaded both klasses, test each for null. 3630 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); 3631 for (which_arg = 0; which_arg <= 1; which_arg++) { 3632 Node* kls = klasses[which_arg]; 3633 Node* null_ctl = top(); 3634 kls = null_check_oop(kls, &null_ctl, never_see_null); 3635 int prim_path = (which_arg == 0 ? _prim_0_path : _prim_1_path); 3636 region->init_req(prim_path, null_ctl); 3637 if (stopped()) break; 3638 klasses[which_arg] = kls; 3639 } 3640 3641 if (!stopped()) { 3642 // now we have two reference types, in klasses[0..1] 3643 Node* subk = klasses[1]; // the argument to isAssignableFrom 3644 Node* superk = klasses[0]; // the receiver 3645 region->set_req(_both_ref_path, gen_subtype_check(subk, superk)); 3646 // now we have a successful reference subtype check 3647 region->set_req(_ref_subtype_path, control()); 3648 } 3649 3650 // If both operands are primitive (both klasses null), then 3651 // we must return true when they are identical primitives. 3652 // It is convenient to test this after the first null klass check. 3653 set_control(region->in(_prim_0_path)); // go back to first null check 3654 if (!stopped()) { 3655 // Since superc is primitive, make a guard for the superc==subc case. 3656 Node* cmp_eq = _gvn.transform(new (C) CmpPNode(args[0], args[1])); 3657 Node* bol_eq = _gvn.transform(new (C) BoolNode(cmp_eq, BoolTest::eq)); 3658 generate_guard(bol_eq, region, PROB_FAIR); 3659 if (region->req() == PATH_LIMIT+1) { 3660 // A guard was added. If the added guard is taken, superc==subc. 3661 region->swap_edges(PATH_LIMIT, _prim_same_path); 3662 region->del_req(PATH_LIMIT); 3663 } 3664 region->set_req(_prim_0_path, control()); // Not equal after all. 3665 } 3666 3667 // these are the only paths that produce 'true': 3668 phi->set_req(_prim_same_path, intcon(1)); 3669 phi->set_req(_ref_subtype_path, intcon(1)); 3670 3671 // pull together the cases: 3672 assert(region->req() == PATH_LIMIT, "sane region"); 3673 for (uint i = 1; i < region->req(); i++) { 3674 Node* ctl = region->in(i); 3675 if (ctl == NULL || ctl == top()) { 3676 region->set_req(i, top()); 3677 phi ->set_req(i, top()); 3678 } else if (phi->in(i) == NULL) { 3679 phi->set_req(i, intcon(0)); // all other paths produce 'false' 3680 } 3681 } 3682 3683 set_control(_gvn.transform(region)); 3684 set_result(_gvn.transform(phi)); 3685 return true; 3686 } 3687 3688 //---------------------generate_array_guard_common------------------------ 3689 Node* LibraryCallKit::generate_array_guard_common(Node* kls, RegionNode* region, 3690 bool obj_array, bool not_array) { 3691 // If obj_array/non_array==false/false: 3692 // Branch around if the given klass is in fact an array (either obj or prim). 3693 // If obj_array/non_array==false/true: 3694 // Branch around if the given klass is not an array klass of any kind. 3695 // If obj_array/non_array==true/true: 3696 // Branch around if the kls is not an oop array (kls is int[], String, etc.) 3697 // If obj_array/non_array==true/false: 3698 // Branch around if the kls is an oop array (Object[] or subtype) 3699 // 3700 // Like generate_guard, adds a new path onto the region. 3701 jint layout_con = 0; 3702 Node* layout_val = get_layout_helper(kls, layout_con); 3703 if (layout_val == NULL) { 3704 bool query = (obj_array 3705 ? Klass::layout_helper_is_objArray(layout_con) 3706 : Klass::layout_helper_is_array(layout_con)); 3707 if (query == not_array) { 3708 return NULL; // never a branch 3709 } else { // always a branch 3710 Node* always_branch = control(); 3711 if (region != NULL) 3712 region->add_req(always_branch); 3713 set_control(top()); 3714 return always_branch; 3715 } 3716 } 3717 // Now test the correct condition. 3718 jint nval = (obj_array 3719 ? ((jint)Klass::_lh_array_tag_type_value 3720 << Klass::_lh_array_tag_shift) 3721 : Klass::_lh_neutral_value); 3722 Node* cmp = _gvn.transform(new(C) CmpINode(layout_val, intcon(nval))); 3723 BoolTest::mask btest = BoolTest::lt; // correct for testing is_[obj]array 3724 // invert the test if we are looking for a non-array 3725 if (not_array) btest = BoolTest(btest).negate(); 3726 Node* bol = _gvn.transform(new(C) BoolNode(cmp, btest)); 3727 return generate_fair_guard(bol, region); 3728 } 3729 3730 3731 //-----------------------inline_native_newArray-------------------------- 3732 // private static native Object java.lang.reflect.newArray(Class<?> componentType, int length); 3733 bool LibraryCallKit::inline_native_newArray() { 3734 Node* mirror = argument(0); 3735 Node* count_val = argument(1); 3736 3737 mirror = null_check(mirror); 3738 // If mirror or obj is dead, only null-path is taken. 3739 if (stopped()) return true; 3740 3741 enum { _normal_path = 1, _slow_path = 2, PATH_LIMIT }; 3742 RegionNode* result_reg = new(C) RegionNode(PATH_LIMIT); 3743 PhiNode* result_val = new(C) PhiNode(result_reg, 3744 TypeInstPtr::NOTNULL); 3745 PhiNode* result_io = new(C) PhiNode(result_reg, Type::ABIO); 3746 PhiNode* result_mem = new(C) PhiNode(result_reg, Type::MEMORY, 3747 TypePtr::BOTTOM); 3748 3749 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); 3750 Node* klass_node = load_array_klass_from_mirror(mirror, never_see_null, 3751 result_reg, _slow_path); 3752 Node* normal_ctl = control(); 3753 Node* no_array_ctl = result_reg->in(_slow_path); 3754 3755 // Generate code for the slow case. We make a call to newArray(). 3756 set_control(no_array_ctl); 3757 if (!stopped()) { 3758 // Either the input type is void.class, or else the 3759 // array klass has not yet been cached. Either the 3760 // ensuing call will throw an exception, or else it 3761 // will cache the array klass for next time. 3762 PreserveJVMState pjvms(this); 3763 CallJavaNode* slow_call = generate_method_call_static(vmIntrinsics::_newArray); 3764 Node* slow_result = set_results_for_java_call(slow_call); 3765 // this->control() comes from set_results_for_java_call 3766 result_reg->set_req(_slow_path, control()); 3767 result_val->set_req(_slow_path, slow_result); 3768 result_io ->set_req(_slow_path, i_o()); 3769 result_mem->set_req(_slow_path, reset_memory()); 3770 } 3771 3772 set_control(normal_ctl); 3773 if (!stopped()) { 3774 // Normal case: The array type has been cached in the java.lang.Class. 3775 // The following call works fine even if the array type is polymorphic. 3776 // It could be a dynamic mix of int[], boolean[], Object[], etc. 3777 Node* obj = new_array(klass_node, count_val, 0); // no arguments to push 3778 result_reg->init_req(_normal_path, control()); 3779 result_val->init_req(_normal_path, obj); 3780 result_io ->init_req(_normal_path, i_o()); 3781 result_mem->init_req(_normal_path, reset_memory()); 3782 } 3783 3784 // Return the combined state. 3785 set_i_o( _gvn.transform(result_io) ); 3786 set_all_memory( _gvn.transform(result_mem)); 3787 3788 C->set_has_split_ifs(true); // Has chance for split-if optimization 3789 set_result(result_reg, result_val); 3790 return true; 3791 } 3792 3793 //----------------------inline_native_getLength-------------------------- 3794 // public static native int java.lang.reflect.Array.getLength(Object array); 3795 bool LibraryCallKit::inline_native_getLength() { 3796 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; 3797 3798 Node* array = null_check(argument(0)); 3799 // If array is dead, only null-path is taken. 3800 if (stopped()) return true; 3801 3802 // Deoptimize if it is a non-array. 3803 Node* non_array = generate_non_array_guard(load_object_klass(array), NULL); 3804 3805 if (non_array != NULL) { 3806 PreserveJVMState pjvms(this); 3807 set_control(non_array); 3808 uncommon_trap(Deoptimization::Reason_intrinsic, 3809 Deoptimization::Action_maybe_recompile); 3810 } 3811 3812 // If control is dead, only non-array-path is taken. 3813 if (stopped()) return true; 3814 3815 // The works fine even if the array type is polymorphic. 3816 // It could be a dynamic mix of int[], boolean[], Object[], etc. 3817 Node* result = load_array_length(array); 3818 3819 C->set_has_split_ifs(true); // Has chance for split-if optimization 3820 set_result(result); 3821 return true; 3822 } 3823 3824 //------------------------inline_array_copyOf---------------------------- 3825 // public static <T,U> T[] java.util.Arrays.copyOf( U[] original, int newLength, Class<? extends T[]> newType); 3826 // public static <T,U> T[] java.util.Arrays.copyOfRange(U[] original, int from, int to, Class<? extends T[]> newType); 3827 bool LibraryCallKit::inline_array_copyOf(bool is_copyOfRange) { 3828 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; 3829 3830 // Get the arguments. 3831 Node* original = argument(0); 3832 Node* start = is_copyOfRange? argument(1): intcon(0); 3833 Node* end = is_copyOfRange? argument(2): argument(1); 3834 Node* array_type_mirror = is_copyOfRange? argument(3): argument(2); 3835 3836 Node* newcopy; 3837 3838 // Set the original stack and the reexecute bit for the interpreter to reexecute 3839 // the bytecode that invokes Arrays.copyOf if deoptimization happens. 3840 { PreserveReexecuteState preexecs(this); 3841 jvms()->set_should_reexecute(true); 3842 3843 array_type_mirror = null_check(array_type_mirror); 3844 original = null_check(original); 3845 3846 // Check if a null path was taken unconditionally. 3847 if (stopped()) return true; 3848 3849 Node* orig_length = load_array_length(original); 3850 3851 Node* klass_node = load_klass_from_mirror(array_type_mirror, false, NULL, 0); 3852 klass_node = null_check(klass_node); 3853 3854 RegionNode* bailout = new (C) RegionNode(1); 3855 record_for_igvn(bailout); 3856 3857 // Despite the generic type of Arrays.copyOf, the mirror might be int, int[], etc. 3858 // Bail out if that is so. 3859 Node* not_objArray = generate_non_objArray_guard(klass_node, bailout); 3860 if (not_objArray != NULL) { 3861 // Improve the klass node's type from the new optimistic assumption: 3862 ciKlass* ak = ciArrayKlass::make(env()->Object_klass()); 3863 const Type* akls = TypeKlassPtr::make(TypePtr::NotNull, ak, 0/*offset*/); 3864 Node* cast = new (C) CastPPNode(klass_node, akls); 3865 cast->init_req(0, control()); 3866 klass_node = _gvn.transform(cast); 3867 } 3868 3869 // Bail out if either start or end is negative. 3870 generate_negative_guard(start, bailout, &start); 3871 generate_negative_guard(end, bailout, &end); 3872 3873 Node* length = end; 3874 if (_gvn.type(start) != TypeInt::ZERO) { 3875 length = _gvn.transform(new (C) SubINode(end, start)); 3876 } 3877 3878 // Bail out if length is negative. 3879 // Without this the new_array would throw 3880 // NegativeArraySizeException but IllegalArgumentException is what 3881 // should be thrown 3882 generate_negative_guard(length, bailout, &length); 3883 3884 if (bailout->req() > 1) { 3885 PreserveJVMState pjvms(this); 3886 set_control(_gvn.transform(bailout)); 3887 uncommon_trap(Deoptimization::Reason_intrinsic, 3888 Deoptimization::Action_maybe_recompile); 3889 } 3890 3891 if (!stopped()) { 3892 // How many elements will we copy from the original? 3893 // The answer is MinI(orig_length - start, length). 3894 Node* orig_tail = _gvn.transform(new (C) SubINode(orig_length, start)); 3895 Node* moved = generate_min_max(vmIntrinsics::_min, orig_tail, length); 3896 3897 newcopy = new_array(klass_node, length, 0); // no argments to push 3898 3899 // Generate a direct call to the right arraycopy function(s). 3900 // We know the copy is disjoint but we might not know if the 3901 // oop stores need checking. 3902 // Extreme case: Arrays.copyOf((Integer[])x, 10, String[].class). 3903 // This will fail a store-check if x contains any non-nulls. 3904 bool disjoint_bases = true; 3905 // if start > orig_length then the length of the copy may be 3906 // negative. 3907 bool length_never_negative = !is_copyOfRange; 3908 generate_arraycopy(TypeAryPtr::OOPS, T_OBJECT, 3909 original, start, newcopy, intcon(0), moved, 3910 disjoint_bases, length_never_negative); 3911 } 3912 } // original reexecute is set back here 3913 3914 C->set_has_split_ifs(true); // Has chance for split-if optimization 3915 if (!stopped()) { 3916 set_result(newcopy); 3917 } 3918 return true; 3919 } 3920 3921 3922 //----------------------generate_virtual_guard--------------------------- 3923 // Helper for hashCode and clone. Peeks inside the vtable to avoid a call. 3924 Node* LibraryCallKit::generate_virtual_guard(Node* obj_klass, 3925 RegionNode* slow_region) { 3926 ciMethod* method = callee(); 3927 int vtable_index = method->vtable_index(); 3928 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, 3929 err_msg_res("bad index %d", vtable_index)); 3930 // Get the Method* out of the appropriate vtable entry. 3931 int entry_offset = (InstanceKlass::vtable_start_offset() + 3932 vtable_index*vtableEntry::size()) * wordSize + 3933 vtableEntry::method_offset_in_bytes(); 3934 Node* entry_addr = basic_plus_adr(obj_klass, entry_offset); 3935 Node* target_call = make_load(NULL, entry_addr, TypePtr::NOTNULL, T_ADDRESS); 3936 3937 // Compare the target method with the expected method (e.g., Object.hashCode). 3938 const TypePtr* native_call_addr = TypeMetadataPtr::make(method); 3939 3940 Node* native_call = makecon(native_call_addr); 3941 Node* chk_native = _gvn.transform(new(C) CmpPNode(target_call, native_call)); 3942 Node* test_native = _gvn.transform(new(C) BoolNode(chk_native, BoolTest::ne)); 3943 3944 return generate_slow_guard(test_native, slow_region); 3945 } 3946 3947 //-----------------------generate_method_call---------------------------- 3948 // Use generate_method_call to make a slow-call to the real 3949 // method if the fast path fails. An alternative would be to 3950 // use a stub like OptoRuntime::slow_arraycopy_Java. 3951 // This only works for expanding the current library call, 3952 // not another intrinsic. (E.g., don't use this for making an 3953 // arraycopy call inside of the copyOf intrinsic.) 3954 CallJavaNode* 3955 LibraryCallKit::generate_method_call(vmIntrinsics::ID method_id, bool is_virtual, bool is_static) { 3956 // When compiling the intrinsic method itself, do not use this technique. 3957 guarantee(callee() != C->method(), "cannot make slow-call to self"); 3958 3959 ciMethod* method = callee(); 3960 // ensure the JVMS we have will be correct for this call 3961 guarantee(method_id == method->intrinsic_id(), "must match"); 3962 3963 const TypeFunc* tf = TypeFunc::make(method); 3964 CallJavaNode* slow_call; 3965 if (is_static) { 3966 assert(!is_virtual, ""); 3967 slow_call = new(C) CallStaticJavaNode(C, tf, 3968 SharedRuntime::get_resolve_static_call_stub(), 3969 method, bci()); 3970 } else if (is_virtual) { 3971 null_check_receiver(); 3972 int vtable_index = Method::invalid_vtable_index; 3973 if (UseInlineCaches) { 3974 // Suppress the vtable call 3975 } else { 3976 // hashCode and clone are not a miranda methods, 3977 // so the vtable index is fixed. 3978 // No need to use the linkResolver to get it. 3979 vtable_index = method->vtable_index(); 3980 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, 3981 err_msg_res("bad index %d", vtable_index)); 3982 } 3983 slow_call = new(C) CallDynamicJavaNode(tf, 3984 SharedRuntime::get_resolve_virtual_call_stub(), 3985 method, vtable_index, bci()); 3986 } else { // neither virtual nor static: opt_virtual 3987 null_check_receiver(); 3988 slow_call = new(C) CallStaticJavaNode(C, tf, 3989 SharedRuntime::get_resolve_opt_virtual_call_stub(), 3990 method, bci()); 3991 slow_call->set_optimized_virtual(true); 3992 } 3993 set_arguments_for_java_call(slow_call); 3994 set_edges_for_java_call(slow_call); 3995 return slow_call; 3996 } 3997 3998 3999 //------------------------------inline_native_hashcode-------------------- 4000 // Build special case code for calls to hashCode on an object. 4001 bool LibraryCallKit::inline_native_hashcode(bool is_virtual, bool is_static) { 4002 assert(is_static == callee()->is_static(), "correct intrinsic selection"); 4003 assert(!(is_virtual && is_static), "either virtual, special, or static"); 4004 4005 enum { _slow_path = 1, _fast_path, _null_path, PATH_LIMIT }; 4006 4007 RegionNode* result_reg = new(C) RegionNode(PATH_LIMIT); 4008 PhiNode* result_val = new(C) PhiNode(result_reg, 4009 TypeInt::INT); 4010 PhiNode* result_io = new(C) PhiNode(result_reg, Type::ABIO); 4011 PhiNode* result_mem = new(C) PhiNode(result_reg, Type::MEMORY, 4012 TypePtr::BOTTOM); 4013 Node* obj = NULL; 4014 if (!is_static) { 4015 // Check for hashing null object 4016 obj = null_check_receiver(); 4017 if (stopped()) return true; // unconditionally null 4018 result_reg->init_req(_null_path, top()); 4019 result_val->init_req(_null_path, top()); 4020 } else { 4021 // Do a null check, and return zero if null. 4022 // System.identityHashCode(null) == 0 4023 obj = argument(0); 4024 Node* null_ctl = top(); 4025 obj = null_check_oop(obj, &null_ctl); 4026 result_reg->init_req(_null_path, null_ctl); 4027 result_val->init_req(_null_path, _gvn.intcon(0)); 4028 } 4029 4030 // Unconditionally null? Then return right away. 4031 if (stopped()) { 4032 set_control( result_reg->in(_null_path)); 4033 if (!stopped()) 4034 set_result(result_val->in(_null_path)); 4035 return true; 4036 } 4037 4038 // After null check, get the object's klass. 4039 Node* obj_klass = load_object_klass(obj); 4040 4041 // This call may be virtual (invokevirtual) or bound (invokespecial). 4042 // For each case we generate slightly different code. 4043 4044 // We only go to the fast case code if we pass a number of guards. The 4045 // paths which do not pass are accumulated in the slow_region. 4046 RegionNode* slow_region = new (C) RegionNode(1); 4047 record_for_igvn(slow_region); 4048 4049 // If this is a virtual call, we generate a funny guard. We pull out 4050 // the vtable entry corresponding to hashCode() from the target object. 4051 // If the target method which we are calling happens to be the native 4052 // Object hashCode() method, we pass the guard. We do not need this 4053 // guard for non-virtual calls -- the caller is known to be the native 4054 // Object hashCode(). 4055 if (is_virtual) { 4056 generate_virtual_guard(obj_klass, slow_region); 4057 } 4058 4059 // Get the header out of the object, use LoadMarkNode when available 4060 Node* header_addr = basic_plus_adr(obj, oopDesc::mark_offset_in_bytes()); 4061 Node* header = make_load(control(), header_addr, TypeX_X, TypeX_X->basic_type()); 4062 4063 // Test the header to see if it is unlocked. 4064 Node *lock_mask = _gvn.MakeConX(markOopDesc::biased_lock_mask_in_place); 4065 Node *lmasked_header = _gvn.transform(new (C) AndXNode(header, lock_mask)); 4066 Node *unlocked_val = _gvn.MakeConX(markOopDesc::unlocked_value); 4067 Node *chk_unlocked = _gvn.transform(new (C) CmpXNode( lmasked_header, unlocked_val)); 4068 Node *test_unlocked = _gvn.transform(new (C) BoolNode( chk_unlocked, BoolTest::ne)); 4069 4070 generate_slow_guard(test_unlocked, slow_region); 4071 4072 // Get the hash value and check to see that it has been properly assigned. 4073 // We depend on hash_mask being at most 32 bits and avoid the use of 4074 // hash_mask_in_place because it could be larger than 32 bits in a 64-bit 4075 // vm: see markOop.hpp. 4076 Node *hash_mask = _gvn.intcon(markOopDesc::hash_mask); 4077 Node *hash_shift = _gvn.intcon(markOopDesc::hash_shift); 4078 Node *hshifted_header= _gvn.transform(new (C) URShiftXNode(header, hash_shift)); 4079 // This hack lets the hash bits live anywhere in the mark object now, as long 4080 // as the shift drops the relevant bits into the low 32 bits. Note that 4081 // Java spec says that HashCode is an int so there's no point in capturing 4082 // an 'X'-sized hashcode (32 in 32-bit build or 64 in 64-bit build). 4083 hshifted_header = ConvX2I(hshifted_header); 4084 Node *hash_val = _gvn.transform(new (C) AndINode(hshifted_header, hash_mask)); 4085 4086 Node *no_hash_val = _gvn.intcon(markOopDesc::no_hash); 4087 Node *chk_assigned = _gvn.transform(new (C) CmpINode( hash_val, no_hash_val)); 4088 Node *test_assigned = _gvn.transform(new (C) BoolNode( chk_assigned, BoolTest::eq)); 4089 4090 generate_slow_guard(test_assigned, slow_region); 4091 4092 Node* init_mem = reset_memory(); 4093 // fill in the rest of the null path: 4094 result_io ->init_req(_null_path, i_o()); 4095 result_mem->init_req(_null_path, init_mem); 4096 4097 result_val->init_req(_fast_path, hash_val); 4098 result_reg->init_req(_fast_path, control()); 4099 result_io ->init_req(_fast_path, i_o()); 4100 result_mem->init_req(_fast_path, init_mem); 4101 4102 // Generate code for the slow case. We make a call to hashCode(). 4103 set_control(_gvn.transform(slow_region)); 4104 if (!stopped()) { 4105 // No need for PreserveJVMState, because we're using up the present state. 4106 set_all_memory(init_mem); 4107 vmIntrinsics::ID hashCode_id = is_static ? vmIntrinsics::_identityHashCode : vmIntrinsics::_hashCode; 4108 CallJavaNode* slow_call = generate_method_call(hashCode_id, is_virtual, is_static); 4109 Node* slow_result = set_results_for_java_call(slow_call); 4110 // this->control() comes from set_results_for_java_call 4111 result_reg->init_req(_slow_path, control()); 4112 result_val->init_req(_slow_path, slow_result); 4113 result_io ->set_req(_slow_path, i_o()); 4114 result_mem ->set_req(_slow_path, reset_memory()); 4115 } 4116 4117 // Return the combined state. 4118 set_i_o( _gvn.transform(result_io) ); 4119 set_all_memory( _gvn.transform(result_mem)); 4120 4121 set_result(result_reg, result_val); 4122 return true; 4123 } 4124 4125 //---------------------------inline_native_getClass---------------------------- 4126 // public final native Class<?> java.lang.Object.getClass(); 4127 // 4128 // Build special case code for calls to getClass on an object. 4129 bool LibraryCallKit::inline_native_getClass() { 4130 Node* obj = null_check_receiver(); 4131 if (stopped()) return true; 4132 set_result(load_mirror_from_klass(load_object_klass(obj))); 4133 return true; 4134 } 4135 4136 //-----------------inline_native_Reflection_getCallerClass--------------------- 4137 // public static native Class<?> sun.reflect.Reflection.getCallerClass(); 4138 // 4139 // In the presence of deep enough inlining, getCallerClass() becomes a no-op. 4140 // 4141 // NOTE: This code must perform the same logic as JVM_GetCallerClass 4142 // in that it must skip particular security frames and checks for 4143 // caller sensitive methods. 4144 bool LibraryCallKit::inline_native_Reflection_getCallerClass() { 4145 #ifndef PRODUCT 4146 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) { 4147 tty->print_cr("Attempting to inline sun.reflect.Reflection.getCallerClass"); 4148 } 4149 #endif 4150 4151 if (!jvms()->has_method()) { 4152 #ifndef PRODUCT 4153 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) { 4154 tty->print_cr(" Bailing out because intrinsic was inlined at top level"); 4155 } 4156 #endif 4157 return false; 4158 } 4159 4160 // Walk back up the JVM state to find the caller at the required 4161 // depth. 4162 JVMState* caller_jvms = jvms(); 4163 4164 // Cf. JVM_GetCallerClass 4165 // NOTE: Start the loop at depth 1 because the current JVM state does 4166 // not include the Reflection.getCallerClass() frame. 4167 for (int n = 1; caller_jvms != NULL; caller_jvms = caller_jvms->caller(), n++) { 4168 ciMethod* m = caller_jvms->method(); 4169 switch (n) { 4170 case 0: 4171 fatal("current JVM state does not include the Reflection.getCallerClass frame"); 4172 break; 4173 case 1: 4174 // Frame 0 and 1 must be caller sensitive (see JVM_GetCallerClass). 4175 if (!m->caller_sensitive()) { 4176 #ifndef PRODUCT 4177 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) { 4178 tty->print_cr(" Bailing out: CallerSensitive annotation expected at frame %d", n); 4179 } 4180 #endif 4181 return false; // bail-out; let JVM_GetCallerClass do the work 4182 } 4183 break; 4184 default: 4185 if (!m->is_ignored_by_security_stack_walk()) { 4186 // We have reached the desired frame; return the holder class. 4187 // Acquire method holder as java.lang.Class and push as constant. 4188 ciInstanceKlass* caller_klass = caller_jvms->method()->holder(); 4189 ciInstance* caller_mirror = caller_klass->java_mirror(); 4190 set_result(makecon(TypeInstPtr::make(caller_mirror))); 4191 4192 #ifndef PRODUCT 4193 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) { 4194 tty->print_cr(" Succeeded: caller = %d) %s.%s, JVMS depth = %d", n, caller_klass->name()->as_utf8(), caller_jvms->method()->name()->as_utf8(), jvms()->depth()); 4195 tty->print_cr(" JVM state at this point:"); 4196 for (int i = jvms()->depth(), n = 1; i >= 1; i--, n++) { 4197 ciMethod* m = jvms()->of_depth(i)->method(); 4198 tty->print_cr(" %d) %s.%s", n, m->holder()->name()->as_utf8(), m->name()->as_utf8()); 4199 } 4200 } 4201 #endif 4202 return true; 4203 } 4204 break; 4205 } 4206 } 4207 4208 #ifndef PRODUCT 4209 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) { 4210 tty->print_cr(" Bailing out because caller depth exceeded inlining depth = %d", jvms()->depth()); 4211 tty->print_cr(" JVM state at this point:"); 4212 for (int i = jvms()->depth(), n = 1; i >= 1; i--, n++) { 4213 ciMethod* m = jvms()->of_depth(i)->method(); 4214 tty->print_cr(" %d) %s.%s", n, m->holder()->name()->as_utf8(), m->name()->as_utf8()); 4215 } 4216 } 4217 #endif 4218 4219 return false; // bail-out; let JVM_GetCallerClass do the work 4220 } 4221 4222 bool LibraryCallKit::inline_fp_conversions(vmIntrinsics::ID id) { 4223 Node* arg = argument(0); 4224 Node* result; 4225 4226 switch (id) { 4227 case vmIntrinsics::_floatToRawIntBits: result = new (C) MoveF2INode(arg); break; 4228 case vmIntrinsics::_intBitsToFloat: result = new (C) MoveI2FNode(arg); break; 4229 case vmIntrinsics::_doubleToRawLongBits: result = new (C) MoveD2LNode(arg); break; 4230 case vmIntrinsics::_longBitsToDouble: result = new (C) MoveL2DNode(arg); break; 4231 4232 case vmIntrinsics::_doubleToLongBits: { 4233 // two paths (plus control) merge in a wood 4234 RegionNode *r = new (C) RegionNode(3); 4235 Node *phi = new (C) PhiNode(r, TypeLong::LONG); 4236 4237 Node *cmpisnan = _gvn.transform(new (C) CmpDNode(arg, arg)); 4238 // Build the boolean node 4239 Node *bolisnan = _gvn.transform(new (C) BoolNode(cmpisnan, BoolTest::ne)); 4240 4241 // Branch either way. 4242 // NaN case is less traveled, which makes all the difference. 4243 IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); 4244 Node *opt_isnan = _gvn.transform(ifisnan); 4245 assert( opt_isnan->is_If(), "Expect an IfNode"); 4246 IfNode *opt_ifisnan = (IfNode*)opt_isnan; 4247 Node *iftrue = _gvn.transform(new (C) IfTrueNode(opt_ifisnan)); 4248 4249 set_control(iftrue); 4250 4251 static const jlong nan_bits = CONST64(0x7ff8000000000000); 4252 Node *slow_result = longcon(nan_bits); // return NaN 4253 phi->init_req(1, _gvn.transform( slow_result )); 4254 r->init_req(1, iftrue); 4255 4256 // Else fall through 4257 Node *iffalse = _gvn.transform(new (C) IfFalseNode(opt_ifisnan)); 4258 set_control(iffalse); 4259 4260 phi->init_req(2, _gvn.transform(new (C) MoveD2LNode(arg))); 4261 r->init_req(2, iffalse); 4262 4263 // Post merge 4264 set_control(_gvn.transform(r)); 4265 record_for_igvn(r); 4266 4267 C->set_has_split_ifs(true); // Has chance for split-if optimization 4268 result = phi; 4269 assert(result->bottom_type()->isa_long(), "must be"); 4270 break; 4271 } 4272 4273 case vmIntrinsics::_floatToIntBits: { 4274 // two paths (plus control) merge in a wood 4275 RegionNode *r = new (C) RegionNode(3); 4276 Node *phi = new (C) PhiNode(r, TypeInt::INT); 4277 4278 Node *cmpisnan = _gvn.transform(new (C) CmpFNode(arg, arg)); 4279 // Build the boolean node 4280 Node *bolisnan = _gvn.transform(new (C) BoolNode(cmpisnan, BoolTest::ne)); 4281 4282 // Branch either way. 4283 // NaN case is less traveled, which makes all the difference. 4284 IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); 4285 Node *opt_isnan = _gvn.transform(ifisnan); 4286 assert( opt_isnan->is_If(), "Expect an IfNode"); 4287 IfNode *opt_ifisnan = (IfNode*)opt_isnan; 4288 Node *iftrue = _gvn.transform(new (C) IfTrueNode(opt_ifisnan)); 4289 4290 set_control(iftrue); 4291 4292 static const jint nan_bits = 0x7fc00000; 4293 Node *slow_result = makecon(TypeInt::make(nan_bits)); // return NaN 4294 phi->init_req(1, _gvn.transform( slow_result )); 4295 r->init_req(1, iftrue); 4296 4297 // Else fall through 4298 Node *iffalse = _gvn.transform(new (C) IfFalseNode(opt_ifisnan)); 4299 set_control(iffalse); 4300 4301 phi->init_req(2, _gvn.transform(new (C) MoveF2INode(arg))); 4302 r->init_req(2, iffalse); 4303 4304 // Post merge 4305 set_control(_gvn.transform(r)); 4306 record_for_igvn(r); 4307 4308 C->set_has_split_ifs(true); // Has chance for split-if optimization 4309 result = phi; 4310 assert(result->bottom_type()->isa_int(), "must be"); 4311 break; 4312 } 4313 4314 default: 4315 fatal_unexpected_iid(id); 4316 break; 4317 } 4318 set_result(_gvn.transform(result)); 4319 return true; 4320 } 4321 4322 #ifdef _LP64 4323 #define XTOP ,top() /*additional argument*/ 4324 #else //_LP64 4325 #define XTOP /*no additional argument*/ 4326 #endif //_LP64 4327 4328 //----------------------inline_unsafe_copyMemory------------------------- 4329 // public native void sun.misc.Unsafe.copyMemory(Object srcBase, long srcOffset, Object destBase, long destOffset, long bytes); 4330 bool LibraryCallKit::inline_unsafe_copyMemory() { 4331 if (callee()->is_static()) return false; // caller must have the capability! 4332 null_check_receiver(); // null-check receiver 4333 if (stopped()) return true; 4334 4335 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". 4336 4337 Node* src_ptr = argument(1); // type: oop 4338 Node* src_off = ConvL2X(argument(2)); // type: long 4339 Node* dst_ptr = argument(4); // type: oop 4340 Node* dst_off = ConvL2X(argument(5)); // type: long 4341 Node* size = ConvL2X(argument(7)); // type: long 4342 4343 assert(Unsafe_field_offset_to_byte_offset(11) == 11, 4344 "fieldOffset must be byte-scaled"); 4345 4346 Node* src = make_unsafe_address(src_ptr, src_off); 4347 Node* dst = make_unsafe_address(dst_ptr, dst_off); 4348 4349 // Conservatively insert a memory barrier on all memory slices. 4350 // Do not let writes of the copy source or destination float below the copy. 4351 insert_mem_bar(Op_MemBarCPUOrder); 4352 4353 // Call it. Note that the length argument is not scaled. 4354 make_runtime_call(RC_LEAF|RC_NO_FP, 4355 OptoRuntime::fast_arraycopy_Type(), 4356 StubRoutines::unsafe_arraycopy(), 4357 "unsafe_arraycopy", 4358 TypeRawPtr::BOTTOM, 4359 src, dst, size XTOP); 4360 4361 // Do not let reads of the copy destination float above the copy. 4362 insert_mem_bar(Op_MemBarCPUOrder); 4363 4364 return true; 4365 } 4366 4367 //------------------------clone_coping----------------------------------- 4368 // Helper function for inline_native_clone. 4369 void LibraryCallKit::copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array, bool card_mark) { 4370 assert(obj_size != NULL, ""); 4371 Node* raw_obj = alloc_obj->in(1); 4372 assert(alloc_obj->is_CheckCastPP() && raw_obj->is_Proj() && raw_obj->in(0)->is_Allocate(), ""); 4373 4374 AllocateNode* alloc = NULL; 4375 if (ReduceBulkZeroing) { 4376 // We will be completely responsible for initializing this object - 4377 // mark Initialize node as complete. 4378 alloc = AllocateNode::Ideal_allocation(alloc_obj, &_gvn); 4379 // The object was just allocated - there should be no any stores! 4380 guarantee(alloc != NULL && alloc->maybe_set_complete(&_gvn), ""); 4381 // Mark as complete_with_arraycopy so that on AllocateNode 4382 // expansion, we know this AllocateNode is initialized by an array 4383 // copy and a StoreStore barrier exists after the array copy. 4384 alloc->initialization()->set_complete_with_arraycopy(); 4385 } 4386 4387 // Copy the fastest available way. 4388 // TODO: generate fields copies for small objects instead. 4389 Node* src = obj; 4390 Node* dest = alloc_obj; 4391 Node* size = _gvn.transform(obj_size); 4392 4393 // Exclude the header but include array length to copy by 8 bytes words. 4394 // Can't use base_offset_in_bytes(bt) since basic type is unknown. 4395 int base_off = is_array ? arrayOopDesc::length_offset_in_bytes() : 4396 instanceOopDesc::base_offset_in_bytes(); 4397 // base_off: 4398 // 8 - 32-bit VM 4399 // 12 - 64-bit VM, compressed klass 4400 // 16 - 64-bit VM, normal klass 4401 if (base_off % BytesPerLong != 0) { 4402 assert(UseCompressedClassPointers, ""); 4403 if (is_array) { 4404 // Exclude length to copy by 8 bytes words. 4405 base_off += sizeof(int); 4406 } else { 4407 // Include klass to copy by 8 bytes words. 4408 base_off = instanceOopDesc::klass_offset_in_bytes(); 4409 } 4410 assert(base_off % BytesPerLong == 0, "expect 8 bytes alignment"); 4411 } 4412 src = basic_plus_adr(src, base_off); 4413 dest = basic_plus_adr(dest, base_off); 4414 4415 // Compute the length also, if needed: 4416 Node* countx = size; 4417 countx = _gvn.transform(new (C) SubXNode(countx, MakeConX(base_off))); 4418 countx = _gvn.transform(new (C) URShiftXNode(countx, intcon(LogBytesPerLong) )); 4419 4420 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM; 4421 bool disjoint_bases = true; 4422 generate_unchecked_arraycopy(raw_adr_type, T_LONG, disjoint_bases, 4423 src, NULL, dest, NULL, countx, 4424 /*dest_uninitialized*/true); 4425 4426 // If necessary, emit some card marks afterwards. (Non-arrays only.) 4427 if (card_mark) { 4428 assert(!is_array, ""); 4429 // Put in store barrier for any and all oops we are sticking 4430 // into this object. (We could avoid this if we could prove 4431 // that the object type contains no oop fields at all.) 4432 Node* no_particular_value = NULL; 4433 Node* no_particular_field = NULL; 4434 int raw_adr_idx = Compile::AliasIdxRaw; 4435 post_barrier(control(), 4436 memory(raw_adr_type), 4437 alloc_obj, 4438 no_particular_field, 4439 raw_adr_idx, 4440 no_particular_value, 4441 T_OBJECT, 4442 false); 4443 } 4444 4445 // Do not let reads from the cloned object float above the arraycopy. 4446 if (alloc != NULL) { 4447 // Do not let stores that initialize this object be reordered with 4448 // a subsequent store that would make this object accessible by 4449 // other threads. 4450 // Record what AllocateNode this StoreStore protects so that 4451 // escape analysis can go from the MemBarStoreStoreNode to the 4452 // AllocateNode and eliminate the MemBarStoreStoreNode if possible 4453 // based on the escape status of the AllocateNode. 4454 insert_mem_bar(Op_MemBarStoreStore, alloc->proj_out(AllocateNode::RawAddress)); 4455 } else { 4456 insert_mem_bar(Op_MemBarCPUOrder); 4457 } 4458 } 4459 4460 //------------------------inline_native_clone---------------------------- 4461 // protected native Object java.lang.Object.clone(); 4462 // 4463 // Here are the simple edge cases: 4464 // null receiver => normal trap 4465 // virtual and clone was overridden => slow path to out-of-line clone 4466 // not cloneable or finalizer => slow path to out-of-line Object.clone 4467 // 4468 // The general case has two steps, allocation and copying. 4469 // Allocation has two cases, and uses GraphKit::new_instance or new_array. 4470 // 4471 // Copying also has two cases, oop arrays and everything else. 4472 // Oop arrays use arrayof_oop_arraycopy (same as System.arraycopy). 4473 // Everything else uses the tight inline loop supplied by CopyArrayNode. 4474 // 4475 // These steps fold up nicely if and when the cloned object's klass 4476 // can be sharply typed as an object array, a type array, or an instance. 4477 // 4478 bool LibraryCallKit::inline_native_clone(bool is_virtual) { 4479 PhiNode* result_val; 4480 4481 // Set the reexecute bit for the interpreter to reexecute 4482 // the bytecode that invokes Object.clone if deoptimization happens. 4483 { PreserveReexecuteState preexecs(this); 4484 jvms()->set_should_reexecute(true); 4485 4486 Node* obj = null_check_receiver(); 4487 if (stopped()) return true; 4488 4489 Node* obj_klass = load_object_klass(obj); 4490 const TypeKlassPtr* tklass = _gvn.type(obj_klass)->isa_klassptr(); 4491 const TypeOopPtr* toop = ((tklass != NULL) 4492 ? tklass->as_instance_type() 4493 : TypeInstPtr::NOTNULL); 4494 4495 // Conservatively insert a memory barrier on all memory slices. 4496 // Do not let writes into the original float below the clone. 4497 insert_mem_bar(Op_MemBarCPUOrder); 4498 4499 // paths into result_reg: 4500 enum { 4501 _slow_path = 1, // out-of-line call to clone method (virtual or not) 4502 _objArray_path, // plain array allocation, plus arrayof_oop_arraycopy 4503 _array_path, // plain array allocation, plus arrayof_long_arraycopy 4504 _instance_path, // plain instance allocation, plus arrayof_long_arraycopy 4505 PATH_LIMIT 4506 }; 4507 RegionNode* result_reg = new(C) RegionNode(PATH_LIMIT); 4508 result_val = new(C) PhiNode(result_reg, 4509 TypeInstPtr::NOTNULL); 4510 PhiNode* result_i_o = new(C) PhiNode(result_reg, Type::ABIO); 4511 PhiNode* result_mem = new(C) PhiNode(result_reg, Type::MEMORY, 4512 TypePtr::BOTTOM); 4513 record_for_igvn(result_reg); 4514 4515 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM; 4516 int raw_adr_idx = Compile::AliasIdxRaw; 4517 4518 Node* array_ctl = generate_array_guard(obj_klass, (RegionNode*)NULL); 4519 if (array_ctl != NULL) { 4520 // It's an array. 4521 PreserveJVMState pjvms(this); 4522 set_control(array_ctl); 4523 Node* obj_length = load_array_length(obj); 4524 Node* obj_size = NULL; 4525 Node* alloc_obj = new_array(obj_klass, obj_length, 0, &obj_size); // no arguments to push 4526 4527 if (!use_ReduceInitialCardMarks()) { 4528 // If it is an oop array, it requires very special treatment, 4529 // because card marking is required on each card of the array. 4530 Node* is_obja = generate_objArray_guard(obj_klass, (RegionNode*)NULL); 4531 if (is_obja != NULL) { 4532 PreserveJVMState pjvms2(this); 4533 set_control(is_obja); 4534 // Generate a direct call to the right arraycopy function(s). 4535 bool disjoint_bases = true; 4536 bool length_never_negative = true; 4537 generate_arraycopy(TypeAryPtr::OOPS, T_OBJECT, 4538 obj, intcon(0), alloc_obj, intcon(0), 4539 obj_length, 4540 disjoint_bases, length_never_negative); 4541 result_reg->init_req(_objArray_path, control()); 4542 result_val->init_req(_objArray_path, alloc_obj); 4543 result_i_o ->set_req(_objArray_path, i_o()); 4544 result_mem ->set_req(_objArray_path, reset_memory()); 4545 } 4546 } 4547 // Otherwise, there are no card marks to worry about. 4548 // (We can dispense with card marks if we know the allocation 4549 // comes out of eden (TLAB)... In fact, ReduceInitialCardMarks 4550 // causes the non-eden paths to take compensating steps to 4551 // simulate a fresh allocation, so that no further 4552 // card marks are required in compiled code to initialize 4553 // the object.) 4554 4555 if (!stopped()) { 4556 copy_to_clone(obj, alloc_obj, obj_size, true, false); 4557 4558 // Present the results of the copy. 4559 result_reg->init_req(_array_path, control()); 4560 result_val->init_req(_array_path, alloc_obj); 4561 result_i_o ->set_req(_array_path, i_o()); 4562 result_mem ->set_req(_array_path, reset_memory()); 4563 } 4564 } 4565 4566 // We only go to the instance fast case code if we pass a number of guards. 4567 // The paths which do not pass are accumulated in the slow_region. 4568 RegionNode* slow_region = new (C) RegionNode(1); 4569 record_for_igvn(slow_region); 4570 if (!stopped()) { 4571 // It's an instance (we did array above). Make the slow-path tests. 4572 // If this is a virtual call, we generate a funny guard. We grab 4573 // the vtable entry corresponding to clone() from the target object. 4574 // If the target method which we are calling happens to be the 4575 // Object clone() method, we pass the guard. We do not need this 4576 // guard for non-virtual calls; the caller is known to be the native 4577 // Object clone(). 4578 if (is_virtual) { 4579 generate_virtual_guard(obj_klass, slow_region); 4580 } 4581 4582 // The object must be cloneable and must not have a finalizer. 4583 // Both of these conditions may be checked in a single test. 4584 // We could optimize the cloneable test further, but we don't care. 4585 generate_access_flags_guard(obj_klass, 4586 // Test both conditions: 4587 JVM_ACC_IS_CLONEABLE | JVM_ACC_HAS_FINALIZER, 4588 // Must be cloneable but not finalizer: 4589 JVM_ACC_IS_CLONEABLE, 4590 slow_region); 4591 } 4592 4593 if (!stopped()) { 4594 // It's an instance, and it passed the slow-path tests. 4595 PreserveJVMState pjvms(this); 4596 Node* obj_size = NULL; 4597 Node* alloc_obj = new_instance(obj_klass, NULL, &obj_size); 4598 4599 copy_to_clone(obj, alloc_obj, obj_size, false, !use_ReduceInitialCardMarks()); 4600 4601 // Present the results of the slow call. 4602 result_reg->init_req(_instance_path, control()); 4603 result_val->init_req(_instance_path, alloc_obj); 4604 result_i_o ->set_req(_instance_path, i_o()); 4605 result_mem ->set_req(_instance_path, reset_memory()); 4606 } 4607 4608 // Generate code for the slow case. We make a call to clone(). 4609 set_control(_gvn.transform(slow_region)); 4610 if (!stopped()) { 4611 PreserveJVMState pjvms(this); 4612 CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_clone, is_virtual); 4613 Node* slow_result = set_results_for_java_call(slow_call); 4614 // this->control() comes from set_results_for_java_call 4615 result_reg->init_req(_slow_path, control()); 4616 result_val->init_req(_slow_path, slow_result); 4617 result_i_o ->set_req(_slow_path, i_o()); 4618 result_mem ->set_req(_slow_path, reset_memory()); 4619 } 4620 4621 // Return the combined state. 4622 set_control( _gvn.transform(result_reg)); 4623 set_i_o( _gvn.transform(result_i_o)); 4624 set_all_memory( _gvn.transform(result_mem)); 4625 } // original reexecute is set back here 4626 4627 set_result(_gvn.transform(result_val)); 4628 return true; 4629 } 4630 4631 //------------------------------basictype2arraycopy---------------------------- 4632 address LibraryCallKit::basictype2arraycopy(BasicType t, 4633 Node* src_offset, 4634 Node* dest_offset, 4635 bool disjoint_bases, 4636 const char* &name, 4637 bool dest_uninitialized) { 4638 const TypeInt* src_offset_inttype = gvn().find_int_type(src_offset);; 4639 const TypeInt* dest_offset_inttype = gvn().find_int_type(dest_offset);; 4640 4641 bool aligned = false; 4642 bool disjoint = disjoint_bases; 4643 4644 // if the offsets are the same, we can treat the memory regions as 4645 // disjoint, because either the memory regions are in different arrays, 4646 // or they are identical (which we can treat as disjoint.) We can also 4647 // treat a copy with a destination index less that the source index 4648 // as disjoint since a low->high copy will work correctly in this case. 4649 if (src_offset_inttype != NULL && src_offset_inttype->is_con() && 4650 dest_offset_inttype != NULL && dest_offset_inttype->is_con()) { 4651 // both indices are constants 4652 int s_offs = src_offset_inttype->get_con(); 4653 int d_offs = dest_offset_inttype->get_con(); 4654 int element_size = type2aelembytes(t); 4655 aligned = ((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) && 4656 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0); 4657 if (s_offs >= d_offs) disjoint = true; 4658 } else if (src_offset == dest_offset && src_offset != NULL) { 4659 // This can occur if the offsets are identical non-constants. 4660 disjoint = true; 4661 } 4662 4663 return StubRoutines::select_arraycopy_function(t, aligned, disjoint, name, dest_uninitialized); 4664 } 4665 4666 4667 //------------------------------inline_arraycopy----------------------- 4668 // public static native void java.lang.System.arraycopy(Object src, int srcPos, 4669 // Object dest, int destPos, 4670 // int length); 4671 bool LibraryCallKit::inline_arraycopy() { 4672 // Get the arguments. 4673 Node* src = argument(0); // type: oop 4674 Node* src_offset = argument(1); // type: int 4675 Node* dest = argument(2); // type: oop 4676 Node* dest_offset = argument(3); // type: int 4677 Node* length = argument(4); // type: int 4678 4679 // Compile time checks. If any of these checks cannot be verified at compile time, 4680 // we do not make a fast path for this call. Instead, we let the call remain as it 4681 // is. The checks we choose to mandate at compile time are: 4682 // 4683 // (1) src and dest are arrays. 4684 const Type* src_type = src->Value(&_gvn); 4685 const Type* dest_type = dest->Value(&_gvn); 4686 const TypeAryPtr* top_src = src_type->isa_aryptr(); 4687 const TypeAryPtr* top_dest = dest_type->isa_aryptr(); 4688 if (top_src == NULL || top_src->klass() == NULL || 4689 top_dest == NULL || top_dest->klass() == NULL) { 4690 // Conservatively insert a memory barrier on all memory slices. 4691 // Do not let writes into the source float below the arraycopy. 4692 insert_mem_bar(Op_MemBarCPUOrder); 4693 4694 // Call StubRoutines::generic_arraycopy stub. 4695 generate_arraycopy(TypeRawPtr::BOTTOM, T_CONFLICT, 4696 src, src_offset, dest, dest_offset, length); 4697 4698 // Do not let reads from the destination float above the arraycopy. 4699 // Since we cannot type the arrays, we don't know which slices 4700 // might be affected. We could restrict this barrier only to those 4701 // memory slices which pertain to array elements--but don't bother. 4702 if (!InsertMemBarAfterArraycopy) 4703 // (If InsertMemBarAfterArraycopy, there is already one in place.) 4704 insert_mem_bar(Op_MemBarCPUOrder); 4705 return true; 4706 } 4707 4708 // (2) src and dest arrays must have elements of the same BasicType 4709 // Figure out the size and type of the elements we will be copying. 4710 BasicType src_elem = top_src->klass()->as_array_klass()->element_type()->basic_type(); 4711 BasicType dest_elem = top_dest->klass()->as_array_klass()->element_type()->basic_type(); 4712 if (src_elem == T_ARRAY) src_elem = T_OBJECT; 4713 if (dest_elem == T_ARRAY) dest_elem = T_OBJECT; 4714 4715 if (src_elem != dest_elem || dest_elem == T_VOID) { 4716 // The component types are not the same or are not recognized. Punt. 4717 // (But, avoid the native method wrapper to JVM_ArrayCopy.) 4718 generate_slow_arraycopy(TypePtr::BOTTOM, 4719 src, src_offset, dest, dest_offset, length, 4720 /*dest_uninitialized*/false); 4721 return true; 4722 } 4723 4724 //--------------------------------------------------------------------------- 4725 // We will make a fast path for this call to arraycopy. 4726 4727 // We have the following tests left to perform: 4728 // 4729 // (3) src and dest must not be null. 4730 // (4) src_offset must not be negative. 4731 // (5) dest_offset must not be negative. 4732 // (6) length must not be negative. 4733 // (7) src_offset + length must not exceed length of src. 4734 // (8) dest_offset + length must not exceed length of dest. 4735 // (9) each element of an oop array must be assignable 4736 4737 RegionNode* slow_region = new (C) RegionNode(1); 4738 record_for_igvn(slow_region); 4739 4740 // (3) operands must not be null 4741 // We currently perform our null checks with the null_check routine. 4742 // This means that the null exceptions will be reported in the caller 4743 // rather than (correctly) reported inside of the native arraycopy call. 4744 // This should be corrected, given time. We do our null check with the 4745 // stack pointer restored. 4746 src = null_check(src, T_ARRAY); 4747 dest = null_check(dest, T_ARRAY); 4748 4749 // (4) src_offset must not be negative. 4750 generate_negative_guard(src_offset, slow_region); 4751 4752 // (5) dest_offset must not be negative. 4753 generate_negative_guard(dest_offset, slow_region); 4754 4755 // (6) length must not be negative (moved to generate_arraycopy()). 4756 // generate_negative_guard(length, slow_region); 4757 4758 // (7) src_offset + length must not exceed length of src. 4759 generate_limit_guard(src_offset, length, 4760 load_array_length(src), 4761 slow_region); 4762 4763 // (8) dest_offset + length must not exceed length of dest. 4764 generate_limit_guard(dest_offset, length, 4765 load_array_length(dest), 4766 slow_region); 4767 4768 // (9) each element of an oop array must be assignable 4769 // The generate_arraycopy subroutine checks this. 4770 4771 // This is where the memory effects are placed: 4772 const TypePtr* adr_type = TypeAryPtr::get_array_body_type(dest_elem); 4773 generate_arraycopy(adr_type, dest_elem, 4774 src, src_offset, dest, dest_offset, length, 4775 false, false, slow_region); 4776 4777 return true; 4778 } 4779 4780 //-----------------------------generate_arraycopy---------------------- 4781 // Generate an optimized call to arraycopy. 4782 // Caller must guard against non-arrays. 4783 // Caller must determine a common array basic-type for both arrays. 4784 // Caller must validate offsets against array bounds. 4785 // The slow_region has already collected guard failure paths 4786 // (such as out of bounds length or non-conformable array types). 4787 // The generated code has this shape, in general: 4788 // 4789 // if (length == 0) return // via zero_path 4790 // slowval = -1 4791 // if (types unknown) { 4792 // slowval = call generic copy loop 4793 // if (slowval == 0) return // via checked_path 4794 // } else if (indexes in bounds) { 4795 // if ((is object array) && !(array type check)) { 4796 // slowval = call checked copy loop 4797 // if (slowval == 0) return // via checked_path 4798 // } else { 4799 // call bulk copy loop 4800 // return // via fast_path 4801 // } 4802 // } 4803 // // adjust params for remaining work: 4804 // if (slowval != -1) { 4805 // n = -1^slowval; src_offset += n; dest_offset += n; length -= n 4806 // } 4807 // slow_region: 4808 // call slow arraycopy(src, src_offset, dest, dest_offset, length) 4809 // return // via slow_call_path 4810 // 4811 // This routine is used from several intrinsics: System.arraycopy, 4812 // Object.clone (the array subcase), and Arrays.copyOf[Range]. 4813 // 4814 void 4815 LibraryCallKit::generate_arraycopy(const TypePtr* adr_type, 4816 BasicType basic_elem_type, 4817 Node* src, Node* src_offset, 4818 Node* dest, Node* dest_offset, 4819 Node* copy_length, 4820 bool disjoint_bases, 4821 bool length_never_negative, 4822 RegionNode* slow_region) { 4823 4824 if (slow_region == NULL) { 4825 slow_region = new(C) RegionNode(1); 4826 record_for_igvn(slow_region); 4827 } 4828 4829 Node* original_dest = dest; 4830 AllocateArrayNode* alloc = NULL; // used for zeroing, if needed 4831 bool dest_uninitialized = false; 4832 4833 // See if this is the initialization of a newly-allocated array. 4834 // If so, we will take responsibility here for initializing it to zero. 4835 // (Note: Because tightly_coupled_allocation performs checks on the 4836 // out-edges of the dest, we need to avoid making derived pointers 4837 // from it until we have checked its uses.) 4838 if (ReduceBulkZeroing 4839 && !ZeroTLAB // pointless if already zeroed 4840 && basic_elem_type != T_CONFLICT // avoid corner case 4841 && !src->eqv_uncast(dest) 4842 && ((alloc = tightly_coupled_allocation(dest, slow_region)) 4843 != NULL) 4844 && _gvn.find_int_con(alloc->in(AllocateNode::ALength), 1) > 0 4845 && alloc->maybe_set_complete(&_gvn)) { 4846 // "You break it, you buy it." 4847 InitializeNode* init = alloc->initialization(); 4848 assert(init->is_complete(), "we just did this"); 4849 init->set_complete_with_arraycopy(); 4850 assert(dest->is_CheckCastPP(), "sanity"); 4851 assert(dest->in(0)->in(0) == init, "dest pinned"); 4852 adr_type = TypeRawPtr::BOTTOM; // all initializations are into raw memory 4853 // From this point on, every exit path is responsible for 4854 // initializing any non-copied parts of the object to zero. 4855 // Also, if this flag is set we make sure that arraycopy interacts properly 4856 // with G1, eliding pre-barriers. See CR 6627983. 4857 dest_uninitialized = true; 4858 } else { 4859 // No zeroing elimination here. 4860 alloc = NULL; 4861 //original_dest = dest; 4862 //dest_uninitialized = false; 4863 } 4864 4865 // Results are placed here: 4866 enum { fast_path = 1, // normal void-returning assembly stub 4867 checked_path = 2, // special assembly stub with cleanup 4868 slow_call_path = 3, // something went wrong; call the VM 4869 zero_path = 4, // bypass when length of copy is zero 4870 bcopy_path = 5, // copy primitive array by 64-bit blocks 4871 PATH_LIMIT = 6 4872 }; 4873 RegionNode* result_region = new(C) RegionNode(PATH_LIMIT); 4874 PhiNode* result_i_o = new(C) PhiNode(result_region, Type::ABIO); 4875 PhiNode* result_memory = new(C) PhiNode(result_region, Type::MEMORY, adr_type); 4876 record_for_igvn(result_region); 4877 _gvn.set_type_bottom(result_i_o); 4878 _gvn.set_type_bottom(result_memory); 4879 assert(adr_type != TypePtr::BOTTOM, "must be RawMem or a T[] slice"); 4880 4881 // The slow_control path: 4882 Node* slow_control; 4883 Node* slow_i_o = i_o(); 4884 Node* slow_mem = memory(adr_type); 4885 debug_only(slow_control = (Node*) badAddress); 4886 4887 // Checked control path: 4888 Node* checked_control = top(); 4889 Node* checked_mem = NULL; 4890 Node* checked_i_o = NULL; 4891 Node* checked_value = NULL; 4892 4893 if (basic_elem_type == T_CONFLICT) { 4894 assert(!dest_uninitialized, ""); 4895 Node* cv = generate_generic_arraycopy(adr_type, 4896 src, src_offset, dest, dest_offset, 4897 copy_length, dest_uninitialized); 4898 if (cv == NULL) cv = intcon(-1); // failure (no stub available) 4899 checked_control = control(); 4900 checked_i_o = i_o(); 4901 checked_mem = memory(adr_type); 4902 checked_value = cv; 4903 set_control(top()); // no fast path 4904 } 4905 4906 Node* not_pos = generate_nonpositive_guard(copy_length, length_never_negative); 4907 if (not_pos != NULL) { 4908 PreserveJVMState pjvms(this); 4909 set_control(not_pos); 4910 4911 // (6) length must not be negative. 4912 if (!length_never_negative) { 4913 generate_negative_guard(copy_length, slow_region); 4914 } 4915 4916 // copy_length is 0. 4917 if (!stopped() && dest_uninitialized) { 4918 Node* dest_length = alloc->in(AllocateNode::ALength); 4919 if (copy_length->eqv_uncast(dest_length) 4920 || _gvn.find_int_con(dest_length, 1) <= 0) { 4921 // There is no zeroing to do. No need for a secondary raw memory barrier. 4922 } else { 4923 // Clear the whole thing since there are no source elements to copy. 4924 generate_clear_array(adr_type, dest, basic_elem_type, 4925 intcon(0), NULL, 4926 alloc->in(AllocateNode::AllocSize)); 4927 // Use a secondary InitializeNode as raw memory barrier. 4928 // Currently it is needed only on this path since other 4929 // paths have stub or runtime calls as raw memory barriers. 4930 InitializeNode* init = insert_mem_bar_volatile(Op_Initialize, 4931 Compile::AliasIdxRaw, 4932 top())->as_Initialize(); 4933 init->set_complete(&_gvn); // (there is no corresponding AllocateNode) 4934 } 4935 } 4936 4937 // Present the results of the fast call. 4938 result_region->init_req(zero_path, control()); 4939 result_i_o ->init_req(zero_path, i_o()); 4940 result_memory->init_req(zero_path, memory(adr_type)); 4941 } 4942 4943 if (!stopped() && dest_uninitialized) { 4944 // We have to initialize the *uncopied* part of the array to zero. 4945 // The copy destination is the slice dest[off..off+len]. The other slices 4946 // are dest_head = dest[0..off] and dest_tail = dest[off+len..dest.length]. 4947 Node* dest_size = alloc->in(AllocateNode::AllocSize); 4948 Node* dest_length = alloc->in(AllocateNode::ALength); 4949 Node* dest_tail = _gvn.transform(new(C) AddINode(dest_offset, 4950 copy_length)); 4951 4952 // If there is a head section that needs zeroing, do it now. 4953 if (find_int_con(dest_offset, -1) != 0) { 4954 generate_clear_array(adr_type, dest, basic_elem_type, 4955 intcon(0), dest_offset, 4956 NULL); 4957 } 4958 4959 // Next, perform a dynamic check on the tail length. 4960 // It is often zero, and we can win big if we prove this. 4961 // There are two wins: Avoid generating the ClearArray 4962 // with its attendant messy index arithmetic, and upgrade 4963 // the copy to a more hardware-friendly word size of 64 bits. 4964 Node* tail_ctl = NULL; 4965 if (!stopped() && !dest_tail->eqv_uncast(dest_length)) { 4966 Node* cmp_lt = _gvn.transform(new(C) CmpINode(dest_tail, dest_length)); 4967 Node* bol_lt = _gvn.transform(new(C) BoolNode(cmp_lt, BoolTest::lt)); 4968 tail_ctl = generate_slow_guard(bol_lt, NULL); 4969 assert(tail_ctl != NULL || !stopped(), "must be an outcome"); 4970 } 4971 4972 // At this point, let's assume there is no tail. 4973 if (!stopped() && alloc != NULL && basic_elem_type != T_OBJECT) { 4974 // There is no tail. Try an upgrade to a 64-bit copy. 4975 bool didit = false; 4976 { PreserveJVMState pjvms(this); 4977 didit = generate_block_arraycopy(adr_type, basic_elem_type, alloc, 4978 src, src_offset, dest, dest_offset, 4979 dest_size, dest_uninitialized); 4980 if (didit) { 4981 // Present the results of the block-copying fast call. 4982 result_region->init_req(bcopy_path, control()); 4983 result_i_o ->init_req(bcopy_path, i_o()); 4984 result_memory->init_req(bcopy_path, memory(adr_type)); 4985 } 4986 } 4987 if (didit) 4988 set_control(top()); // no regular fast path 4989 } 4990 4991 // Clear the tail, if any. 4992 if (tail_ctl != NULL) { 4993 Node* notail_ctl = stopped() ? NULL : control(); 4994 set_control(tail_ctl); 4995 if (notail_ctl == NULL) { 4996 generate_clear_array(adr_type, dest, basic_elem_type, 4997 dest_tail, NULL, 4998 dest_size); 4999 } else { 5000 // Make a local merge. 5001 Node* done_ctl = new(C) RegionNode(3); 5002 Node* done_mem = new(C) PhiNode(done_ctl, Type::MEMORY, adr_type); 5003 done_ctl->init_req(1, notail_ctl); 5004 done_mem->init_req(1, memory(adr_type)); 5005 generate_clear_array(adr_type, dest, basic_elem_type, 5006 dest_tail, NULL, 5007 dest_size); 5008 done_ctl->init_req(2, control()); 5009 done_mem->init_req(2, memory(adr_type)); 5010 set_control( _gvn.transform(done_ctl)); 5011 set_memory( _gvn.transform(done_mem), adr_type ); 5012 } 5013 } 5014 } 5015 5016 BasicType copy_type = basic_elem_type; 5017 assert(basic_elem_type != T_ARRAY, "caller must fix this"); 5018 if (!stopped() && copy_type == T_OBJECT) { 5019 // If src and dest have compatible element types, we can copy bits. 5020 // Types S[] and D[] are compatible if D is a supertype of S. 5021 // 5022 // If they are not, we will use checked_oop_disjoint_arraycopy, 5023 // which performs a fast optimistic per-oop check, and backs off 5024 // further to JVM_ArrayCopy on the first per-oop check that fails. 5025 // (Actually, we don't move raw bits only; the GC requires card marks.) 5026 5027 // Get the Klass* for both src and dest 5028 Node* src_klass = load_object_klass(src); 5029 Node* dest_klass = load_object_klass(dest); 5030 5031 // Generate the subtype check. 5032 // This might fold up statically, or then again it might not. 5033 // 5034 // Non-static example: Copying List<String>.elements to a new String[]. 5035 // The backing store for a List<String> is always an Object[], 5036 // but its elements are always type String, if the generic types 5037 // are correct at the source level. 5038 // 5039 // Test S[] against D[], not S against D, because (probably) 5040 // the secondary supertype cache is less busy for S[] than S. 5041 // This usually only matters when D is an interface. 5042 Node* not_subtype_ctrl = gen_subtype_check(src_klass, dest_klass); 5043 // Plug failing path into checked_oop_disjoint_arraycopy 5044 if (not_subtype_ctrl != top()) { 5045 PreserveJVMState pjvms(this); 5046 set_control(not_subtype_ctrl); 5047 // (At this point we can assume disjoint_bases, since types differ.) 5048 int ek_offset = in_bytes(ObjArrayKlass::element_klass_offset()); 5049 Node* p1 = basic_plus_adr(dest_klass, ek_offset); 5050 Node* n1 = LoadKlassNode::make(_gvn, immutable_memory(), p1, TypeRawPtr::BOTTOM); 5051 Node* dest_elem_klass = _gvn.transform(n1); 5052 Node* cv = generate_checkcast_arraycopy(adr_type, 5053 dest_elem_klass, 5054 src, src_offset, dest, dest_offset, 5055 ConvI2X(copy_length), dest_uninitialized); 5056 if (cv == NULL) cv = intcon(-1); // failure (no stub available) 5057 checked_control = control(); 5058 checked_i_o = i_o(); 5059 checked_mem = memory(adr_type); 5060 checked_value = cv; 5061 } 5062 // At this point we know we do not need type checks on oop stores. 5063 5064 // Let's see if we need card marks: 5065 if (alloc != NULL && use_ReduceInitialCardMarks()) { 5066 // If we do not need card marks, copy using the jint or jlong stub. 5067 copy_type = LP64_ONLY(UseCompressedOops ? T_INT : T_LONG) NOT_LP64(T_INT); 5068 assert(type2aelembytes(basic_elem_type) == type2aelembytes(copy_type), 5069 "sizes agree"); 5070 } 5071 } 5072 5073 if (!stopped()) { 5074 // Generate the fast path, if possible. 5075 PreserveJVMState pjvms(this); 5076 generate_unchecked_arraycopy(adr_type, copy_type, disjoint_bases, 5077 src, src_offset, dest, dest_offset, 5078 ConvI2X(copy_length), dest_uninitialized); 5079 5080 // Present the results of the fast call. 5081 result_region->init_req(fast_path, control()); 5082 result_i_o ->init_req(fast_path, i_o()); 5083 result_memory->init_req(fast_path, memory(adr_type)); 5084 } 5085 5086 // Here are all the slow paths up to this point, in one bundle: 5087 slow_control = top(); 5088 if (slow_region != NULL) 5089 slow_control = _gvn.transform(slow_region); 5090 DEBUG_ONLY(slow_region = (RegionNode*)badAddress); 5091 5092 set_control(checked_control); 5093 if (!stopped()) { 5094 // Clean up after the checked call. 5095 // The returned value is either 0 or -1^K, 5096 // where K = number of partially transferred array elements. 5097 Node* cmp = _gvn.transform(new(C) CmpINode(checked_value, intcon(0))); 5098 Node* bol = _gvn.transform(new(C) BoolNode(cmp, BoolTest::eq)); 5099 IfNode* iff = create_and_map_if(control(), bol, PROB_MAX, COUNT_UNKNOWN); 5100 5101 // If it is 0, we are done, so transfer to the end. 5102 Node* checks_done = _gvn.transform(new(C) IfTrueNode(iff)); 5103 result_region->init_req(checked_path, checks_done); 5104 result_i_o ->init_req(checked_path, checked_i_o); 5105 result_memory->init_req(checked_path, checked_mem); 5106 5107 // If it is not zero, merge into the slow call. 5108 set_control( _gvn.transform(new(C) IfFalseNode(iff) )); 5109 RegionNode* slow_reg2 = new(C) RegionNode(3); 5110 PhiNode* slow_i_o2 = new(C) PhiNode(slow_reg2, Type::ABIO); 5111 PhiNode* slow_mem2 = new(C) PhiNode(slow_reg2, Type::MEMORY, adr_type); 5112 record_for_igvn(slow_reg2); 5113 slow_reg2 ->init_req(1, slow_control); 5114 slow_i_o2 ->init_req(1, slow_i_o); 5115 slow_mem2 ->init_req(1, slow_mem); 5116 slow_reg2 ->init_req(2, control()); 5117 slow_i_o2 ->init_req(2, checked_i_o); 5118 slow_mem2 ->init_req(2, checked_mem); 5119 5120 slow_control = _gvn.transform(slow_reg2); 5121 slow_i_o = _gvn.transform(slow_i_o2); 5122 slow_mem = _gvn.transform(slow_mem2); 5123 5124 if (alloc != NULL) { 5125 // We'll restart from the very beginning, after zeroing the whole thing. 5126 // This can cause double writes, but that's OK since dest is brand new. 5127 // So we ignore the low 31 bits of the value returned from the stub. 5128 } else { 5129 // We must continue the copy exactly where it failed, or else 5130 // another thread might see the wrong number of writes to dest. 5131 Node* checked_offset = _gvn.transform(new(C) XorINode(checked_value, intcon(-1))); 5132 Node* slow_offset = new(C) PhiNode(slow_reg2, TypeInt::INT); 5133 slow_offset->init_req(1, intcon(0)); 5134 slow_offset->init_req(2, checked_offset); 5135 slow_offset = _gvn.transform(slow_offset); 5136 5137 // Adjust the arguments by the conditionally incoming offset. 5138 Node* src_off_plus = _gvn.transform(new(C) AddINode(src_offset, slow_offset)); 5139 Node* dest_off_plus = _gvn.transform(new(C) AddINode(dest_offset, slow_offset)); 5140 Node* length_minus = _gvn.transform(new(C) SubINode(copy_length, slow_offset)); 5141 5142 // Tweak the node variables to adjust the code produced below: 5143 src_offset = src_off_plus; 5144 dest_offset = dest_off_plus; 5145 copy_length = length_minus; 5146 } 5147 } 5148 5149 set_control(slow_control); 5150 if (!stopped()) { 5151 // Generate the slow path, if needed. 5152 PreserveJVMState pjvms(this); // replace_in_map may trash the map 5153 5154 set_memory(slow_mem, adr_type); 5155 set_i_o(slow_i_o); 5156 5157 if (dest_uninitialized) { 5158 generate_clear_array(adr_type, dest, basic_elem_type, 5159 intcon(0), NULL, 5160 alloc->in(AllocateNode::AllocSize)); 5161 } 5162 5163 generate_slow_arraycopy(adr_type, 5164 src, src_offset, dest, dest_offset, 5165 copy_length, /*dest_uninitialized*/false); 5166 5167 result_region->init_req(slow_call_path, control()); 5168 result_i_o ->init_req(slow_call_path, i_o()); 5169 result_memory->init_req(slow_call_path, memory(adr_type)); 5170 } 5171 5172 // Remove unused edges. 5173 for (uint i = 1; i < result_region->req(); i++) { 5174 if (result_region->in(i) == NULL) 5175 result_region->init_req(i, top()); 5176 } 5177 5178 // Finished; return the combined state. 5179 set_control( _gvn.transform(result_region)); 5180 set_i_o( _gvn.transform(result_i_o) ); 5181 set_memory( _gvn.transform(result_memory), adr_type ); 5182 5183 // The memory edges above are precise in order to model effects around 5184 // array copies accurately to allow value numbering of field loads around 5185 // arraycopy. Such field loads, both before and after, are common in Java 5186 // collections and similar classes involving header/array data structures. 5187 // 5188 // But with low number of register or when some registers are used or killed 5189 // by arraycopy calls it causes registers spilling on stack. See 6544710. 5190 // The next memory barrier is added to avoid it. If the arraycopy can be 5191 // optimized away (which it can, sometimes) then we can manually remove 5192 // the membar also. 5193 // 5194 // Do not let reads from the cloned object float above the arraycopy. 5195 if (alloc != NULL) { 5196 // Do not let stores that initialize this object be reordered with 5197 // a subsequent store that would make this object accessible by 5198 // other threads. 5199 // Record what AllocateNode this StoreStore protects so that 5200 // escape analysis can go from the MemBarStoreStoreNode to the 5201 // AllocateNode and eliminate the MemBarStoreStoreNode if possible 5202 // based on the escape status of the AllocateNode. 5203 insert_mem_bar(Op_MemBarStoreStore, alloc->proj_out(AllocateNode::RawAddress)); 5204 } else if (InsertMemBarAfterArraycopy) 5205 insert_mem_bar(Op_MemBarCPUOrder); 5206 } 5207 5208 5209 // Helper function which determines if an arraycopy immediately follows 5210 // an allocation, with no intervening tests or other escapes for the object. 5211 AllocateArrayNode* 5212 LibraryCallKit::tightly_coupled_allocation(Node* ptr, 5213 RegionNode* slow_region) { 5214 if (stopped()) return NULL; // no fast path 5215 if (C->AliasLevel() == 0) return NULL; // no MergeMems around 5216 5217 AllocateArrayNode* alloc = AllocateArrayNode::Ideal_array_allocation(ptr, &_gvn); 5218 if (alloc == NULL) return NULL; 5219 5220 Node* rawmem = memory(Compile::AliasIdxRaw); 5221 // Is the allocation's memory state untouched? 5222 if (!(rawmem->is_Proj() && rawmem->in(0)->is_Initialize())) { 5223 // Bail out if there have been raw-memory effects since the allocation. 5224 // (Example: There might have been a call or safepoint.) 5225 return NULL; 5226 } 5227 rawmem = rawmem->in(0)->as_Initialize()->memory(Compile::AliasIdxRaw); 5228 if (!(rawmem->is_Proj() && rawmem->in(0) == alloc)) { 5229 return NULL; 5230 } 5231 5232 // There must be no unexpected observers of this allocation. 5233 for (DUIterator_Fast imax, i = ptr->fast_outs(imax); i < imax; i++) { 5234 Node* obs = ptr->fast_out(i); 5235 if (obs != this->map()) { 5236 return NULL; 5237 } 5238 } 5239 5240 // This arraycopy must unconditionally follow the allocation of the ptr. 5241 Node* alloc_ctl = ptr->in(0); 5242 assert(just_allocated_object(alloc_ctl) == ptr, "most recent allo"); 5243 5244 Node* ctl = control(); 5245 while (ctl != alloc_ctl) { 5246 // There may be guards which feed into the slow_region. 5247 // Any other control flow means that we might not get a chance 5248 // to finish initializing the allocated object. 5249 if ((ctl->is_IfFalse() || ctl->is_IfTrue()) && ctl->in(0)->is_If()) { 5250 IfNode* iff = ctl->in(0)->as_If(); 5251 Node* not_ctl = iff->proj_out(1 - ctl->as_Proj()->_con); 5252 assert(not_ctl != NULL && not_ctl != ctl, "found alternate"); 5253 if (slow_region != NULL && slow_region->find_edge(not_ctl) >= 1) { 5254 ctl = iff->in(0); // This test feeds the known slow_region. 5255 continue; 5256 } 5257 // One more try: Various low-level checks bottom out in 5258 // uncommon traps. If the debug-info of the trap omits 5259 // any reference to the allocation, as we've already 5260 // observed, then there can be no objection to the trap. 5261 bool found_trap = false; 5262 for (DUIterator_Fast jmax, j = not_ctl->fast_outs(jmax); j < jmax; j++) { 5263 Node* obs = not_ctl->fast_out(j); 5264 if (obs->in(0) == not_ctl && obs->is_Call() && 5265 (obs->as_Call()->entry_point() == SharedRuntime::uncommon_trap_blob()->entry_point())) { 5266 found_trap = true; break; 5267 } 5268 } 5269 if (found_trap) { 5270 ctl = iff->in(0); // This test feeds a harmless uncommon trap. 5271 continue; 5272 } 5273 } 5274 return NULL; 5275 } 5276 5277 // If we get this far, we have an allocation which immediately 5278 // precedes the arraycopy, and we can take over zeroing the new object. 5279 // The arraycopy will finish the initialization, and provide 5280 // a new control state to which we will anchor the destination pointer. 5281 5282 return alloc; 5283 } 5284 5285 // Helper for initialization of arrays, creating a ClearArray. 5286 // It writes zero bits in [start..end), within the body of an array object. 5287 // The memory effects are all chained onto the 'adr_type' alias category. 5288 // 5289 // Since the object is otherwise uninitialized, we are free 5290 // to put a little "slop" around the edges of the cleared area, 5291 // as long as it does not go back into the array's header, 5292 // or beyond the array end within the heap. 5293 // 5294 // The lower edge can be rounded down to the nearest jint and the 5295 // upper edge can be rounded up to the nearest MinObjAlignmentInBytes. 5296 // 5297 // Arguments: 5298 // adr_type memory slice where writes are generated 5299 // dest oop of the destination array 5300 // basic_elem_type element type of the destination 5301 // slice_idx array index of first element to store 5302 // slice_len number of elements to store (or NULL) 5303 // dest_size total size in bytes of the array object 5304 // 5305 // Exactly one of slice_len or dest_size must be non-NULL. 5306 // If dest_size is non-NULL, zeroing extends to the end of the object. 5307 // If slice_len is non-NULL, the slice_idx value must be a constant. 5308 void 5309 LibraryCallKit::generate_clear_array(const TypePtr* adr_type, 5310 Node* dest, 5311 BasicType basic_elem_type, 5312 Node* slice_idx, 5313 Node* slice_len, 5314 Node* dest_size) { 5315 // one or the other but not both of slice_len and dest_size: 5316 assert((slice_len != NULL? 1: 0) + (dest_size != NULL? 1: 0) == 1, ""); 5317 if (slice_len == NULL) slice_len = top(); 5318 if (dest_size == NULL) dest_size = top(); 5319 5320 // operate on this memory slice: 5321 Node* mem = memory(adr_type); // memory slice to operate on 5322 5323 // scaling and rounding of indexes: 5324 int scale = exact_log2(type2aelembytes(basic_elem_type)); 5325 int abase = arrayOopDesc::base_offset_in_bytes(basic_elem_type); 5326 int clear_low = (-1 << scale) & (BytesPerInt - 1); 5327 int bump_bit = (-1 << scale) & BytesPerInt; 5328 5329 // determine constant starts and ends 5330 const intptr_t BIG_NEG = -128; 5331 assert(BIG_NEG + 2*abase < 0, "neg enough"); 5332 intptr_t slice_idx_con = (intptr_t) find_int_con(slice_idx, BIG_NEG); 5333 intptr_t slice_len_con = (intptr_t) find_int_con(slice_len, BIG_NEG); 5334 if (slice_len_con == 0) { 5335 return; // nothing to do here 5336 } 5337 intptr_t start_con = (abase + (slice_idx_con << scale)) & ~clear_low; 5338 intptr_t end_con = find_intptr_t_con(dest_size, -1); 5339 if (slice_idx_con >= 0 && slice_len_con >= 0) { 5340 assert(end_con < 0, "not two cons"); 5341 end_con = round_to(abase + ((slice_idx_con + slice_len_con) << scale), 5342 BytesPerLong); 5343 } 5344 5345 if (start_con >= 0 && end_con >= 0) { 5346 // Constant start and end. Simple. 5347 mem = ClearArrayNode::clear_memory(control(), mem, dest, 5348 start_con, end_con, &_gvn); 5349 } else if (start_con >= 0 && dest_size != top()) { 5350 // Constant start, pre-rounded end after the tail of the array. 5351 Node* end = dest_size; 5352 mem = ClearArrayNode::clear_memory(control(), mem, dest, 5353 start_con, end, &_gvn); 5354 } else if (start_con >= 0 && slice_len != top()) { 5355 // Constant start, non-constant end. End needs rounding up. 5356 // End offset = round_up(abase + ((slice_idx_con + slice_len) << scale), 8) 5357 intptr_t end_base = abase + (slice_idx_con << scale); 5358 int end_round = (-1 << scale) & (BytesPerLong - 1); 5359 Node* end = ConvI2X(slice_len); 5360 if (scale != 0) 5361 end = _gvn.transform(new(C) LShiftXNode(end, intcon(scale) )); 5362 end_base += end_round; 5363 end = _gvn.transform(new(C) AddXNode(end, MakeConX(end_base))); 5364 end = _gvn.transform(new(C) AndXNode(end, MakeConX(~end_round))); 5365 mem = ClearArrayNode::clear_memory(control(), mem, dest, 5366 start_con, end, &_gvn); 5367 } else if (start_con < 0 && dest_size != top()) { 5368 // Non-constant start, pre-rounded end after the tail of the array. 5369 // This is almost certainly a "round-to-end" operation. 5370 Node* start = slice_idx; 5371 start = ConvI2X(start); 5372 if (scale != 0) 5373 start = _gvn.transform(new(C) LShiftXNode( start, intcon(scale) )); 5374 start = _gvn.transform(new(C) AddXNode(start, MakeConX(abase))); 5375 if ((bump_bit | clear_low) != 0) { 5376 int to_clear = (bump_bit | clear_low); 5377 // Align up mod 8, then store a jint zero unconditionally 5378 // just before the mod-8 boundary. 5379 if (((abase + bump_bit) & ~to_clear) - bump_bit 5380 < arrayOopDesc::length_offset_in_bytes() + BytesPerInt) { 5381 bump_bit = 0; 5382 assert((abase & to_clear) == 0, "array base must be long-aligned"); 5383 } else { 5384 // Bump 'start' up to (or past) the next jint boundary: 5385 start = _gvn.transform(new(C) AddXNode(start, MakeConX(bump_bit))); 5386 assert((abase & clear_low) == 0, "array base must be int-aligned"); 5387 } 5388 // Round bumped 'start' down to jlong boundary in body of array. 5389 start = _gvn.transform(new(C) AndXNode(start, MakeConX(~to_clear))); 5390 if (bump_bit != 0) { 5391 // Store a zero to the immediately preceding jint: 5392 Node* x1 = _gvn.transform(new(C) AddXNode(start, MakeConX(-bump_bit))); 5393 Node* p1 = basic_plus_adr(dest, x1); 5394 mem = StoreNode::make(_gvn, control(), mem, p1, adr_type, intcon(0), T_INT); 5395 mem = _gvn.transform(mem); 5396 } 5397 } 5398 Node* end = dest_size; // pre-rounded 5399 mem = ClearArrayNode::clear_memory(control(), mem, dest, 5400 start, end, &_gvn); 5401 } else { 5402 // Non-constant start, unrounded non-constant end. 5403 // (Nobody zeroes a random midsection of an array using this routine.) 5404 ShouldNotReachHere(); // fix caller 5405 } 5406 5407 // Done. 5408 set_memory(mem, adr_type); 5409 } 5410 5411 5412 bool 5413 LibraryCallKit::generate_block_arraycopy(const TypePtr* adr_type, 5414 BasicType basic_elem_type, 5415 AllocateNode* alloc, 5416 Node* src, Node* src_offset, 5417 Node* dest, Node* dest_offset, 5418 Node* dest_size, bool dest_uninitialized) { 5419 // See if there is an advantage from block transfer. 5420 int scale = exact_log2(type2aelembytes(basic_elem_type)); 5421 if (scale >= LogBytesPerLong) 5422 return false; // it is already a block transfer 5423 5424 // Look at the alignment of the starting offsets. 5425 int abase = arrayOopDesc::base_offset_in_bytes(basic_elem_type); 5426 5427 intptr_t src_off_con = (intptr_t) find_int_con(src_offset, -1); 5428 intptr_t dest_off_con = (intptr_t) find_int_con(dest_offset, -1); 5429 if (src_off_con < 0 || dest_off_con < 0) 5430 // At present, we can only understand constants. 5431 return false; 5432 5433 intptr_t src_off = abase + (src_off_con << scale); 5434 intptr_t dest_off = abase + (dest_off_con << scale); 5435 5436 if (((src_off | dest_off) & (BytesPerLong-1)) != 0) { 5437 // Non-aligned; too bad. 5438 // One more chance: Pick off an initial 32-bit word. 5439 // This is a common case, since abase can be odd mod 8. 5440 if (((src_off | dest_off) & (BytesPerLong-1)) == BytesPerInt && 5441 ((src_off ^ dest_off) & (BytesPerLong-1)) == 0) { 5442 Node* sptr = basic_plus_adr(src, src_off); 5443 Node* dptr = basic_plus_adr(dest, dest_off); 5444 Node* sval = make_load(control(), sptr, TypeInt::INT, T_INT, adr_type); 5445 store_to_memory(control(), dptr, sval, T_INT, adr_type); 5446 src_off += BytesPerInt; 5447 dest_off += BytesPerInt; 5448 } else { 5449 return false; 5450 } 5451 } 5452 assert(src_off % BytesPerLong == 0, ""); 5453 assert(dest_off % BytesPerLong == 0, ""); 5454 5455 // Do this copy by giant steps. 5456 Node* sptr = basic_plus_adr(src, src_off); 5457 Node* dptr = basic_plus_adr(dest, dest_off); 5458 Node* countx = dest_size; 5459 countx = _gvn.transform(new (C) SubXNode(countx, MakeConX(dest_off))); 5460 countx = _gvn.transform(new (C) URShiftXNode(countx, intcon(LogBytesPerLong))); 5461 5462 bool disjoint_bases = true; // since alloc != NULL 5463 generate_unchecked_arraycopy(adr_type, T_LONG, disjoint_bases, 5464 sptr, NULL, dptr, NULL, countx, dest_uninitialized); 5465 5466 return true; 5467 } 5468 5469 5470 // Helper function; generates code for the slow case. 5471 // We make a call to a runtime method which emulates the native method, 5472 // but without the native wrapper overhead. 5473 void 5474 LibraryCallKit::generate_slow_arraycopy(const TypePtr* adr_type, 5475 Node* src, Node* src_offset, 5476 Node* dest, Node* dest_offset, 5477 Node* copy_length, bool dest_uninitialized) { 5478 assert(!dest_uninitialized, "Invariant"); 5479 Node* call = make_runtime_call(RC_NO_LEAF | RC_UNCOMMON, 5480 OptoRuntime::slow_arraycopy_Type(), 5481 OptoRuntime::slow_arraycopy_Java(), 5482 "slow_arraycopy", adr_type, 5483 src, src_offset, dest, dest_offset, 5484 copy_length); 5485 5486 // Handle exceptions thrown by this fellow: 5487 make_slow_call_ex(call, env()->Throwable_klass(), false); 5488 } 5489 5490 // Helper function; generates code for cases requiring runtime checks. 5491 Node* 5492 LibraryCallKit::generate_checkcast_arraycopy(const TypePtr* adr_type, 5493 Node* dest_elem_klass, 5494 Node* src, Node* src_offset, 5495 Node* dest, Node* dest_offset, 5496 Node* copy_length, bool dest_uninitialized) { 5497 if (stopped()) return NULL; 5498 5499 address copyfunc_addr = StubRoutines::checkcast_arraycopy(dest_uninitialized); 5500 if (copyfunc_addr == NULL) { // Stub was not generated, go slow path. 5501 return NULL; 5502 } 5503 5504 // Pick out the parameters required to perform a store-check 5505 // for the target array. This is an optimistic check. It will 5506 // look in each non-null element's class, at the desired klass's 5507 // super_check_offset, for the desired klass. 5508 int sco_offset = in_bytes(Klass::super_check_offset_offset()); 5509 Node* p3 = basic_plus_adr(dest_elem_klass, sco_offset); 5510 Node* n3 = new(C) LoadINode(NULL, memory(p3), p3, _gvn.type(p3)->is_ptr()); 5511 Node* check_offset = ConvI2X(_gvn.transform(n3)); 5512 Node* check_value = dest_elem_klass; 5513 5514 Node* src_start = array_element_address(src, src_offset, T_OBJECT); 5515 Node* dest_start = array_element_address(dest, dest_offset, T_OBJECT); 5516 5517 // (We know the arrays are never conjoint, because their types differ.) 5518 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, 5519 OptoRuntime::checkcast_arraycopy_Type(), 5520 copyfunc_addr, "checkcast_arraycopy", adr_type, 5521 // five arguments, of which two are 5522 // intptr_t (jlong in LP64) 5523 src_start, dest_start, 5524 copy_length XTOP, 5525 check_offset XTOP, 5526 check_value); 5527 5528 return _gvn.transform(new (C) ProjNode(call, TypeFunc::Parms)); 5529 } 5530 5531 5532 // Helper function; generates code for cases requiring runtime checks. 5533 Node* 5534 LibraryCallKit::generate_generic_arraycopy(const TypePtr* adr_type, 5535 Node* src, Node* src_offset, 5536 Node* dest, Node* dest_offset, 5537 Node* copy_length, bool dest_uninitialized) { 5538 assert(!dest_uninitialized, "Invariant"); 5539 if (stopped()) return NULL; 5540 address copyfunc_addr = StubRoutines::generic_arraycopy(); 5541 if (copyfunc_addr == NULL) { // Stub was not generated, go slow path. 5542 return NULL; 5543 } 5544 5545 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, 5546 OptoRuntime::generic_arraycopy_Type(), 5547 copyfunc_addr, "generic_arraycopy", adr_type, 5548 src, src_offset, dest, dest_offset, copy_length); 5549 5550 return _gvn.transform(new (C) ProjNode(call, TypeFunc::Parms)); 5551 } 5552 5553 // Helper function; generates the fast out-of-line call to an arraycopy stub. 5554 void 5555 LibraryCallKit::generate_unchecked_arraycopy(const TypePtr* adr_type, 5556 BasicType basic_elem_type, 5557 bool disjoint_bases, 5558 Node* src, Node* src_offset, 5559 Node* dest, Node* dest_offset, 5560 Node* copy_length, bool dest_uninitialized) { 5561 if (stopped()) return; // nothing to do 5562 5563 Node* src_start = src; 5564 Node* dest_start = dest; 5565 if (src_offset != NULL || dest_offset != NULL) { 5566 assert(src_offset != NULL && dest_offset != NULL, ""); 5567 src_start = array_element_address(src, src_offset, basic_elem_type); 5568 dest_start = array_element_address(dest, dest_offset, basic_elem_type); 5569 } 5570 5571 // Figure out which arraycopy runtime method to call. 5572 const char* copyfunc_name = "arraycopy"; 5573 address copyfunc_addr = 5574 basictype2arraycopy(basic_elem_type, src_offset, dest_offset, 5575 disjoint_bases, copyfunc_name, dest_uninitialized); 5576 5577 // Call it. Note that the count_ix value is not scaled to a byte-size. 5578 make_runtime_call(RC_LEAF|RC_NO_FP, 5579 OptoRuntime::fast_arraycopy_Type(), 5580 copyfunc_addr, copyfunc_name, adr_type, 5581 src_start, dest_start, copy_length XTOP); 5582 } 5583 5584 //-------------inline_encodeISOArray----------------------------------- 5585 // encode char[] to byte[] in ISO_8859_1 5586 bool LibraryCallKit::inline_encodeISOArray() { 5587 assert(callee()->signature()->size() == 5, "encodeISOArray has 5 parameters"); 5588 // no receiver since it is static method 5589 Node *src = argument(0); 5590 Node *src_offset = argument(1); 5591 Node *dst = argument(2); 5592 Node *dst_offset = argument(3); 5593 Node *length = argument(4); 5594 5595 const Type* src_type = src->Value(&_gvn); 5596 const Type* dst_type = dst->Value(&_gvn); 5597 const TypeAryPtr* top_src = src_type->isa_aryptr(); 5598 const TypeAryPtr* top_dest = dst_type->isa_aryptr(); 5599 if (top_src == NULL || top_src->klass() == NULL || 5600 top_dest == NULL || top_dest->klass() == NULL) { 5601 // failed array check 5602 return false; 5603 } 5604 5605 // Figure out the size and type of the elements we will be copying. 5606 BasicType src_elem = src_type->isa_aryptr()->klass()->as_array_klass()->element_type()->basic_type(); 5607 BasicType dst_elem = dst_type->isa_aryptr()->klass()->as_array_klass()->element_type()->basic_type(); 5608 if (src_elem != T_CHAR || dst_elem != T_BYTE) { 5609 return false; 5610 } 5611 Node* src_start = array_element_address(src, src_offset, src_elem); 5612 Node* dst_start = array_element_address(dst, dst_offset, dst_elem); 5613 // 'src_start' points to src array + scaled offset 5614 // 'dst_start' points to dst array + scaled offset 5615 5616 const TypeAryPtr* mtype = TypeAryPtr::BYTES; 5617 Node* enc = new (C) EncodeISOArrayNode(control(), memory(mtype), src_start, dst_start, length); 5618 enc = _gvn.transform(enc); 5619 Node* res_mem = _gvn.transform(new (C) SCMemProjNode(enc)); 5620 set_memory(res_mem, mtype); 5621 set_result(enc); 5622 return true; 5623 } 5624 5625 /** 5626 * Calculate CRC32 for byte. 5627 * int java.util.zip.CRC32.update(int crc, int b) 5628 */ 5629 bool LibraryCallKit::inline_updateCRC32() { 5630 assert(UseCRC32Intrinsics, "need AVX and LCMUL instructions support"); 5631 assert(callee()->signature()->size() == 2, "update has 2 parameters"); 5632 // no receiver since it is static method 5633 Node* crc = argument(0); // type: int 5634 Node* b = argument(1); // type: int 5635 5636 /* 5637 * int c = ~ crc; 5638 * b = timesXtoThe32[(b ^ c) & 0xFF]; 5639 * b = b ^ (c >>> 8); 5640 * crc = ~b; 5641 */ 5642 5643 Node* M1 = intcon(-1); 5644 crc = _gvn.transform(new (C) XorINode(crc, M1)); 5645 Node* result = _gvn.transform(new (C) XorINode(crc, b)); 5646 result = _gvn.transform(new (C) AndINode(result, intcon(0xFF))); 5647 5648 Node* base = makecon(TypeRawPtr::make(StubRoutines::crc_table_addr())); 5649 Node* offset = _gvn.transform(new (C) LShiftINode(result, intcon(0x2))); 5650 Node* adr = basic_plus_adr(top(), base, ConvI2X(offset)); 5651 result = make_load(control(), adr, TypeInt::INT, T_INT); 5652 5653 crc = _gvn.transform(new (C) URShiftINode(crc, intcon(8))); 5654 result = _gvn.transform(new (C) XorINode(crc, result)); 5655 result = _gvn.transform(new (C) XorINode(result, M1)); 5656 set_result(result); 5657 return true; 5658 } 5659 5660 /** 5661 * Calculate CRC32 for byte[] array. 5662 * int java.util.zip.CRC32.updateBytes(int crc, byte[] buf, int off, int len) 5663 */ 5664 bool LibraryCallKit::inline_updateBytesCRC32() { 5665 assert(UseCRC32Intrinsics, "need AVX and LCMUL instructions support"); 5666 assert(callee()->signature()->size() == 4, "updateBytes has 4 parameters"); 5667 // no receiver since it is static method 5668 Node* crc = argument(0); // type: int 5669 Node* src = argument(1); // type: oop 5670 Node* offset = argument(2); // type: int 5671 Node* length = argument(3); // type: int 5672 5673 const Type* src_type = src->Value(&_gvn); 5674 const TypeAryPtr* top_src = src_type->isa_aryptr(); 5675 if (top_src == NULL || top_src->klass() == NULL) { 5676 // failed array check 5677 return false; 5678 } 5679 5680 // Figure out the size and type of the elements we will be copying. 5681 BasicType src_elem = src_type->isa_aryptr()->klass()->as_array_klass()->element_type()->basic_type(); 5682 if (src_elem != T_BYTE) { 5683 return false; 5684 } 5685 5686 // 'src_start' points to src array + scaled offset 5687 Node* src_start = array_element_address(src, offset, src_elem); 5688 5689 // We assume that range check is done by caller. 5690 // TODO: generate range check (offset+length < src.length) in debug VM. 5691 5692 // Call the stub. 5693 address stubAddr = StubRoutines::updateBytesCRC32(); 5694 const char *stubName = "updateBytesCRC32"; 5695 5696 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, OptoRuntime::updateBytesCRC32_Type(), 5697 stubAddr, stubName, TypePtr::BOTTOM, 5698 crc, src_start, length); 5699 Node* result = _gvn.transform(new (C) ProjNode(call, TypeFunc::Parms)); 5700 set_result(result); 5701 return true; 5702 } 5703 5704 /** 5705 * Calculate CRC32 for ByteBuffer. 5706 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len) 5707 */ 5708 bool LibraryCallKit::inline_updateByteBufferCRC32() { 5709 assert(UseCRC32Intrinsics, "need AVX and LCMUL instructions support"); 5710 assert(callee()->signature()->size() == 5, "updateByteBuffer has 4 parameters and one is long"); 5711 // no receiver since it is static method 5712 Node* crc = argument(0); // type: int 5713 Node* src = argument(1); // type: long 5714 Node* offset = argument(3); // type: int 5715 Node* length = argument(4); // type: int 5716 5717 src = ConvL2X(src); // adjust Java long to machine word 5718 Node* base = _gvn.transform(new (C) CastX2PNode(src)); 5719 offset = ConvI2X(offset); 5720 5721 // 'src_start' points to src array + scaled offset 5722 Node* src_start = basic_plus_adr(top(), base, offset); 5723 5724 // Call the stub. 5725 address stubAddr = StubRoutines::updateBytesCRC32(); 5726 const char *stubName = "updateBytesCRC32"; 5727 5728 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, OptoRuntime::updateBytesCRC32_Type(), 5729 stubAddr, stubName, TypePtr::BOTTOM, 5730 crc, src_start, length); 5731 Node* result = _gvn.transform(new (C) ProjNode(call, TypeFunc::Parms)); 5732 set_result(result); 5733 return true; 5734 } 5735 5736 //----------------------------inline_reference_get---------------------------- 5737 // public T java.lang.ref.Reference.get(); 5738 bool LibraryCallKit::inline_reference_get() { 5739 const int referent_offset = java_lang_ref_Reference::referent_offset; 5740 guarantee(referent_offset > 0, "should have already been set"); 5741 5742 // Get the argument: 5743 Node* reference_obj = null_check_receiver(); 5744 if (stopped()) return true; 5745 5746 Node* adr = basic_plus_adr(reference_obj, reference_obj, referent_offset); 5747 5748 ciInstanceKlass* klass = env()->Object_klass(); 5749 const TypeOopPtr* object_type = TypeOopPtr::make_from_klass(klass); 5750 5751 Node* no_ctrl = NULL; 5752 Node* result = make_load(no_ctrl, adr, object_type, T_OBJECT); 5753 5754 // Use the pre-barrier to record the value in the referent field 5755 pre_barrier(false /* do_load */, 5756 control(), 5757 NULL /* obj */, NULL /* adr */, max_juint /* alias_idx */, NULL /* val */, NULL /* val_type */, 5758 result /* pre_val */, 5759 T_OBJECT); 5760 5761 // Add memory barrier to prevent commoning reads from this field 5762 // across safepoint since GC can change its value. 5763 insert_mem_bar(Op_MemBarCPUOrder); 5764 5765 set_result(result); 5766 return true; 5767 } 5768 5769 5770 Node * LibraryCallKit::load_field_from_object(Node * fromObj, const char * fieldName, const char * fieldTypeString, 5771 bool is_exact=true, bool is_static=false) { 5772 5773 const TypeInstPtr* tinst = _gvn.type(fromObj)->isa_instptr(); 5774 assert(tinst != NULL, "obj is null"); 5775 assert(tinst->klass()->is_loaded(), "obj is not loaded"); 5776 assert(!is_exact || tinst->klass_is_exact(), "klass not exact"); 5777 5778 ciField* field = tinst->klass()->as_instance_klass()->get_field_by_name(ciSymbol::make(fieldName), 5779 ciSymbol::make(fieldTypeString), 5780 is_static); 5781 if (field == NULL) return (Node *) NULL; 5782 assert (field != NULL, "undefined field"); 5783 5784 // Next code copied from Parse::do_get_xxx(): 5785 5786 // Compute address and memory type. 5787 int offset = field->offset_in_bytes(); 5788 bool is_vol = field->is_volatile(); 5789 ciType* field_klass = field->type(); 5790 assert(field_klass->is_loaded(), "should be loaded"); 5791 const TypePtr* adr_type = C->alias_type(field)->adr_type(); 5792 Node *adr = basic_plus_adr(fromObj, fromObj, offset); 5793 BasicType bt = field->layout_type(); 5794 5795 // Build the resultant type of the load 5796 const Type *type = TypeOopPtr::make_from_klass(field_klass->as_klass()); 5797 5798 // Build the load. 5799 Node* loadedField = make_load(NULL, adr, type, bt, adr_type, is_vol); 5800 return loadedField; 5801 } 5802 5803 5804 //------------------------------inline_aescrypt_Block----------------------- 5805 bool LibraryCallKit::inline_aescrypt_Block(vmIntrinsics::ID id) { 5806 address stubAddr; 5807 const char *stubName; 5808 assert(UseAES, "need AES instruction support"); 5809 5810 switch(id) { 5811 case vmIntrinsics::_aescrypt_encryptBlock: 5812 stubAddr = StubRoutines::aescrypt_encryptBlock(); 5813 stubName = "aescrypt_encryptBlock"; 5814 break; 5815 case vmIntrinsics::_aescrypt_decryptBlock: 5816 stubAddr = StubRoutines::aescrypt_decryptBlock(); 5817 stubName = "aescrypt_decryptBlock"; 5818 break; 5819 } 5820 if (stubAddr == NULL) return false; 5821 5822 Node* aescrypt_object = argument(0); 5823 Node* src = argument(1); 5824 Node* src_offset = argument(2); 5825 Node* dest = argument(3); 5826 Node* dest_offset = argument(4); 5827 5828 // (1) src and dest are arrays. 5829 const Type* src_type = src->Value(&_gvn); 5830 const Type* dest_type = dest->Value(&_gvn); 5831 const TypeAryPtr* top_src = src_type->isa_aryptr(); 5832 const TypeAryPtr* top_dest = dest_type->isa_aryptr(); 5833 assert (top_src != NULL && top_src->klass() != NULL && top_dest != NULL && top_dest->klass() != NULL, "args are strange"); 5834 5835 // for the quick and dirty code we will skip all the checks. 5836 // we are just trying to get the call to be generated. 5837 Node* src_start = src; 5838 Node* dest_start = dest; 5839 if (src_offset != NULL || dest_offset != NULL) { 5840 assert(src_offset != NULL && dest_offset != NULL, ""); 5841 src_start = array_element_address(src, src_offset, T_BYTE); 5842 dest_start = array_element_address(dest, dest_offset, T_BYTE); 5843 } 5844 5845 // now need to get the start of its expanded key array 5846 // this requires a newer class file that has this array as littleEndian ints, otherwise we revert to java 5847 Node* k_start = get_key_start_from_aescrypt_object(aescrypt_object); 5848 if (k_start == NULL) return false; 5849 5850 // Call the stub. 5851 make_runtime_call(RC_LEAF|RC_NO_FP, OptoRuntime::aescrypt_block_Type(), 5852 stubAddr, stubName, TypePtr::BOTTOM, 5853 src_start, dest_start, k_start); 5854 5855 return true; 5856 } 5857 5858 //------------------------------inline_cipherBlockChaining_AESCrypt----------------------- 5859 bool LibraryCallKit::inline_cipherBlockChaining_AESCrypt(vmIntrinsics::ID id) { 5860 address stubAddr; 5861 const char *stubName; 5862 5863 assert(UseAES, "need AES instruction support"); 5864 5865 switch(id) { 5866 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt: 5867 stubAddr = StubRoutines::cipherBlockChaining_encryptAESCrypt(); 5868 stubName = "cipherBlockChaining_encryptAESCrypt"; 5869 break; 5870 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt: 5871 stubAddr = StubRoutines::cipherBlockChaining_decryptAESCrypt(); 5872 stubName = "cipherBlockChaining_decryptAESCrypt"; 5873 break; 5874 } 5875 if (stubAddr == NULL) return false; 5876 5877 Node* cipherBlockChaining_object = argument(0); 5878 Node* src = argument(1); 5879 Node* src_offset = argument(2); 5880 Node* len = argument(3); 5881 Node* dest = argument(4); 5882 Node* dest_offset = argument(5); 5883 5884 // (1) src and dest are arrays. 5885 const Type* src_type = src->Value(&_gvn); 5886 const Type* dest_type = dest->Value(&_gvn); 5887 const TypeAryPtr* top_src = src_type->isa_aryptr(); 5888 const TypeAryPtr* top_dest = dest_type->isa_aryptr(); 5889 assert (top_src != NULL && top_src->klass() != NULL 5890 && top_dest != NULL && top_dest->klass() != NULL, "args are strange"); 5891 5892 // checks are the responsibility of the caller 5893 Node* src_start = src; 5894 Node* dest_start = dest; 5895 if (src_offset != NULL || dest_offset != NULL) { 5896 assert(src_offset != NULL && dest_offset != NULL, ""); 5897 src_start = array_element_address(src, src_offset, T_BYTE); 5898 dest_start = array_element_address(dest, dest_offset, T_BYTE); 5899 } 5900 5901 // if we are in this set of code, we "know" the embeddedCipher is an AESCrypt object 5902 // (because of the predicated logic executed earlier). 5903 // so we cast it here safely. 5904 // this requires a newer class file that has this array as littleEndian ints, otherwise we revert to java 5905 5906 Node* embeddedCipherObj = load_field_from_object(cipherBlockChaining_object, "embeddedCipher", "Lcom/sun/crypto/provider/SymmetricCipher;", /*is_exact*/ false); 5907 if (embeddedCipherObj == NULL) return false; 5908 5909 // cast it to what we know it will be at runtime 5910 const TypeInstPtr* tinst = _gvn.type(cipherBlockChaining_object)->isa_instptr(); 5911 assert(tinst != NULL, "CBC obj is null"); 5912 assert(tinst->klass()->is_loaded(), "CBC obj is not loaded"); 5913 ciKlass* klass_AESCrypt = tinst->klass()->as_instance_klass()->find_klass(ciSymbol::make("com/sun/crypto/provider/AESCrypt")); 5914 if (!klass_AESCrypt->is_loaded()) return false; 5915 5916 ciInstanceKlass* instklass_AESCrypt = klass_AESCrypt->as_instance_klass(); 5917 const TypeKlassPtr* aklass = TypeKlassPtr::make(instklass_AESCrypt); 5918 const TypeOopPtr* xtype = aklass->as_instance_type(); 5919 Node* aescrypt_object = new(C) CheckCastPPNode(control(), embeddedCipherObj, xtype); 5920 aescrypt_object = _gvn.transform(aescrypt_object); 5921 5922 // we need to get the start of the aescrypt_object's expanded key array 5923 Node* k_start = get_key_start_from_aescrypt_object(aescrypt_object); 5924 if (k_start == NULL) return false; 5925 5926 // similarly, get the start address of the r vector 5927 Node* objRvec = load_field_from_object(cipherBlockChaining_object, "r", "[B", /*is_exact*/ false); 5928 if (objRvec == NULL) return false; 5929 Node* r_start = array_element_address(objRvec, intcon(0), T_BYTE); 5930 5931 // Call the stub, passing src_start, dest_start, k_start, r_start and src_len 5932 make_runtime_call(RC_LEAF|RC_NO_FP, 5933 OptoRuntime::cipherBlockChaining_aescrypt_Type(), 5934 stubAddr, stubName, TypePtr::BOTTOM, 5935 src_start, dest_start, k_start, r_start, len); 5936 5937 // return is void so no result needs to be pushed 5938 5939 return true; 5940 } 5941 5942 //------------------------------get_key_start_from_aescrypt_object----------------------- 5943 Node * LibraryCallKit::get_key_start_from_aescrypt_object(Node *aescrypt_object) { 5944 Node* objAESCryptKey = load_field_from_object(aescrypt_object, "K", "[I", /*is_exact*/ false); 5945 assert (objAESCryptKey != NULL, "wrong version of com.sun.crypto.provider.AESCrypt"); 5946 if (objAESCryptKey == NULL) return (Node *) NULL; 5947 5948 // now have the array, need to get the start address of the K array 5949 Node* k_start = array_element_address(objAESCryptKey, intcon(0), T_INT); 5950 return k_start; 5951 } 5952 5953 //----------------------------inline_cipherBlockChaining_AESCrypt_predicate---------------------------- 5954 // Return node representing slow path of predicate check. 5955 // the pseudo code we want to emulate with this predicate is: 5956 // for encryption: 5957 // if (embeddedCipherObj instanceof AESCrypt) do_intrinsic, else do_javapath 5958 // for decryption: 5959 // if ((embeddedCipherObj instanceof AESCrypt) && (cipher!=plain)) do_intrinsic, else do_javapath 5960 // note cipher==plain is more conservative than the original java code but that's OK 5961 // 5962 Node* LibraryCallKit::inline_cipherBlockChaining_AESCrypt_predicate(bool decrypting) { 5963 // First, check receiver for NULL since it is virtual method. 5964 Node* objCBC = argument(0); 5965 objCBC = null_check(objCBC); 5966 5967 if (stopped()) return NULL; // Always NULL 5968 5969 // Load embeddedCipher field of CipherBlockChaining object. 5970 Node* embeddedCipherObj = load_field_from_object(objCBC, "embeddedCipher", "Lcom/sun/crypto/provider/SymmetricCipher;", /*is_exact*/ false); 5971 5972 // get AESCrypt klass for instanceOf check 5973 // AESCrypt might not be loaded yet if some other SymmetricCipher got us to this compile point 5974 // will have same classloader as CipherBlockChaining object 5975 const TypeInstPtr* tinst = _gvn.type(objCBC)->isa_instptr(); 5976 assert(tinst != NULL, "CBCobj is null"); 5977 assert(tinst->klass()->is_loaded(), "CBCobj is not loaded"); 5978 5979 // we want to do an instanceof comparison against the AESCrypt class 5980 ciKlass* klass_AESCrypt = tinst->klass()->as_instance_klass()->find_klass(ciSymbol::make("com/sun/crypto/provider/AESCrypt")); 5981 if (!klass_AESCrypt->is_loaded()) { 5982 // if AESCrypt is not even loaded, we never take the intrinsic fast path 5983 Node* ctrl = control(); 5984 set_control(top()); // no regular fast path 5985 return ctrl; 5986 } 5987 ciInstanceKlass* instklass_AESCrypt = klass_AESCrypt->as_instance_klass(); 5988 5989 Node* instof = gen_instanceof(embeddedCipherObj, makecon(TypeKlassPtr::make(instklass_AESCrypt))); 5990 Node* cmp_instof = _gvn.transform(new (C) CmpINode(instof, intcon(1))); 5991 Node* bool_instof = _gvn.transform(new (C) BoolNode(cmp_instof, BoolTest::ne)); 5992 5993 Node* instof_false = generate_guard(bool_instof, NULL, PROB_MIN); 5994 5995 // for encryption, we are done 5996 if (!decrypting) 5997 return instof_false; // even if it is NULL 5998 5999 // for decryption, we need to add a further check to avoid 6000 // taking the intrinsic path when cipher and plain are the same 6001 // see the original java code for why. 6002 RegionNode* region = new(C) RegionNode(3); 6003 region->init_req(1, instof_false); 6004 Node* src = argument(1); 6005 Node* dest = argument(4); 6006 Node* cmp_src_dest = _gvn.transform(new (C) CmpPNode(src, dest)); 6007 Node* bool_src_dest = _gvn.transform(new (C) BoolNode(cmp_src_dest, BoolTest::eq)); 6008 Node* src_dest_conjoint = generate_guard(bool_src_dest, NULL, PROB_MIN); 6009 region->init_req(2, src_dest_conjoint); 6010 6011 record_for_igvn(region); 6012 return _gvn.transform(region); 6013 }