1 /*
2 * Copyright (c) 1999, 2014, 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 "asm/macroAssembler.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "compiler/compileLog.hpp"
31 #include "oops/objArrayKlass.hpp"
32 #include "opto/addnode.hpp"
33 #include "opto/callGenerator.hpp"
34 #include "opto/castnode.hpp"
35 #include "opto/cfgnode.hpp"
36 #include "opto/convertnode.hpp"
37 #include "opto/countbitsnode.hpp"
38 #include "opto/intrinsicnode.hpp"
39 #include "opto/idealKit.hpp"
40 #include "opto/mathexactnode.hpp"
41 #include "opto/movenode.hpp"
42 #include "opto/mulnode.hpp"
43 #include "opto/narrowptrnode.hpp"
44 #include "opto/parse.hpp"
45 #include "opto/runtime.hpp"
46 #include "opto/subnode.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "runtime/sharedRuntime.hpp"
49 #include "trace/traceMacros.hpp"
50
51 class LibraryIntrinsic : public InlineCallGenerator {
52 // Extend the set of intrinsics known to the runtime:
53 public:
54 private:
55 bool _is_virtual;
56 bool _does_virtual_dispatch;
57 int8_t _predicates_count; // Intrinsic is predicated by several conditions
58 int8_t _last_predicate; // Last generated predicate
59 vmIntrinsics::ID _intrinsic_id;
60
61 public:
62 LibraryIntrinsic(ciMethod* m, bool is_virtual, int predicates_count, bool does_virtual_dispatch, vmIntrinsics::ID id)
63 : InlineCallGenerator(m),
64 _is_virtual(is_virtual),
65 _does_virtual_dispatch(does_virtual_dispatch),
66 _predicates_count((int8_t)predicates_count),
67 _last_predicate((int8_t)-1),
68 _intrinsic_id(id)
69 {
70 }
71 virtual bool is_intrinsic() const { return true; }
72 virtual bool is_virtual() const { return _is_virtual; }
73 virtual bool is_predicated() const { return _predicates_count > 0; }
74 virtual int predicates_count() const { return _predicates_count; }
75 virtual bool does_virtual_dispatch() const { return _does_virtual_dispatch; }
76 virtual JVMState* generate(JVMState* jvms);
77 virtual Node* generate_predicate(JVMState* jvms, int predicate);
78 vmIntrinsics::ID intrinsic_id() const { return _intrinsic_id; }
79 };
80
81
82 // Local helper class for LibraryIntrinsic:
83 class LibraryCallKit : public GraphKit {
84 private:
85 LibraryIntrinsic* _intrinsic; // the library intrinsic being called
86 Node* _result; // the result node, if any
87 int _reexecute_sp; // the stack pointer when bytecode needs to be reexecuted
88
89 const TypeOopPtr* sharpen_unsafe_type(Compile::AliasType* alias_type, const TypePtr *adr_type, bool is_native_ptr = false);
90
91 public:
92 LibraryCallKit(JVMState* jvms, LibraryIntrinsic* intrinsic)
93 : GraphKit(jvms),
94 _intrinsic(intrinsic),
95 _result(NULL)
96 {
97 // Check if this is a root compile. In that case we don't have a caller.
98 if (!jvms->has_method()) {
99 _reexecute_sp = sp();
100 } else {
101 // Find out how many arguments the interpreter needs when deoptimizing
102 // and save the stack pointer value so it can used by uncommon_trap.
103 // We find the argument count by looking at the declared signature.
104 bool ignored_will_link;
105 ciSignature* declared_signature = NULL;
106 ciMethod* ignored_callee = caller()->get_method_at_bci(bci(), ignored_will_link, &declared_signature);
107 const int nargs = declared_signature->arg_size_for_bc(caller()->java_code_at_bci(bci()));
108 _reexecute_sp = sp() + nargs; // "push" arguments back on stack
109 }
110 }
111
112 virtual LibraryCallKit* is_LibraryCallKit() const { return (LibraryCallKit*)this; }
113
114 ciMethod* caller() const { return jvms()->method(); }
115 int bci() const { return jvms()->bci(); }
116 LibraryIntrinsic* intrinsic() const { return _intrinsic; }
117 vmIntrinsics::ID intrinsic_id() const { return _intrinsic->intrinsic_id(); }
118 ciMethod* callee() const { return _intrinsic->method(); }
119
120 bool try_to_inline(int predicate);
121 Node* try_to_predicate(int predicate);
122
123 void push_result() {
124 // Push the result onto the stack.
125 if (!stopped() && result() != NULL) {
126 BasicType bt = result()->bottom_type()->basic_type();
127 push_node(bt, result());
128 }
129 }
130
131 private:
132 void fatal_unexpected_iid(vmIntrinsics::ID iid) {
133 fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid)));
134 }
135
136 void set_result(Node* n) { assert(_result == NULL, "only set once"); _result = n; }
137 void set_result(RegionNode* region, PhiNode* value);
138 Node* result() { return _result; }
139
140 virtual int reexecute_sp() { return _reexecute_sp; }
141
142 // Helper functions to inline natives
143 Node* generate_guard(Node* test, RegionNode* region, float true_prob);
144 Node* generate_slow_guard(Node* test, RegionNode* region);
145 Node* generate_fair_guard(Node* test, RegionNode* region);
146 Node* generate_negative_guard(Node* index, RegionNode* region,
147 // resulting CastII of index:
148 Node* *pos_index = NULL);
149 Node* generate_limit_guard(Node* offset, Node* subseq_length,
150 Node* array_length,
151 RegionNode* region);
152 Node* generate_current_thread(Node* &tls_output);
153 Node* load_mirror_from_klass(Node* klass);
154 Node* load_klass_from_mirror_common(Node* mirror, bool never_see_null,
155 RegionNode* region, int null_path,
156 int offset);
157 Node* load_klass_from_mirror(Node* mirror, bool never_see_null,
158 RegionNode* region, int null_path) {
159 int offset = java_lang_Class::klass_offset_in_bytes();
160 return load_klass_from_mirror_common(mirror, never_see_null,
161 region, null_path,
162 offset);
163 }
164 Node* load_array_klass_from_mirror(Node* mirror, bool never_see_null,
165 RegionNode* region, int null_path) {
166 int offset = java_lang_Class::array_klass_offset_in_bytes();
167 return load_klass_from_mirror_common(mirror, never_see_null,
168 region, null_path,
169 offset);
170 }
171 Node* generate_access_flags_guard(Node* kls,
172 int modifier_mask, int modifier_bits,
173 RegionNode* region);
174 Node* generate_interface_guard(Node* kls, RegionNode* region);
175 Node* generate_array_guard(Node* kls, RegionNode* region) {
176 return generate_array_guard_common(kls, region, false, false);
177 }
178 Node* generate_non_array_guard(Node* kls, RegionNode* region) {
179 return generate_array_guard_common(kls, region, false, true);
180 }
181 Node* generate_objArray_guard(Node* kls, RegionNode* region) {
182 return generate_array_guard_common(kls, region, true, false);
183 }
184 Node* generate_non_objArray_guard(Node* kls, RegionNode* region) {
185 return generate_array_guard_common(kls, region, true, true);
186 }
187 Node* generate_array_guard_common(Node* kls, RegionNode* region,
188 bool obj_array, bool not_array);
189 Node* generate_virtual_guard(Node* obj_klass, RegionNode* slow_region);
190 CallJavaNode* generate_method_call(vmIntrinsics::ID method_id,
191 bool is_virtual = false, bool is_static = false);
192 CallJavaNode* generate_method_call_static(vmIntrinsics::ID method_id) {
193 return generate_method_call(method_id, false, true);
194 }
195 CallJavaNode* generate_method_call_virtual(vmIntrinsics::ID method_id) {
196 return generate_method_call(method_id, true, false);
197 }
198 Node * load_field_from_object(Node * fromObj, const char * fieldName, const char * fieldTypeString, bool is_exact, bool is_static);
199
200 Node* make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2);
201 Node* make_string_method_node(int opcode, Node* str1, Node* str2);
202 bool inline_string_compareTo();
203 bool inline_string_indexOf();
204 Node* string_indexOf(Node* string_object, ciTypeArray* target_array, jint offset, jint cache_i, jint md2_i);
205 bool inline_string_equals();
206 Node* round_double_node(Node* n);
207 bool runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName);
208 bool inline_math_native(vmIntrinsics::ID id);
209 bool inline_trig(vmIntrinsics::ID id);
210 bool inline_math(vmIntrinsics::ID id);
211 template <typename OverflowOp>
212 bool inline_math_overflow(Node* arg1, Node* arg2);
213 void inline_math_mathExact(Node* math, Node* test);
214 bool inline_math_addExactI(bool is_increment);
215 bool inline_math_addExactL(bool is_increment);
216 bool inline_math_multiplyExactI();
217 bool inline_math_multiplyExactL();
218 bool inline_math_negateExactI();
219 bool inline_math_negateExactL();
220 bool inline_math_subtractExactI(bool is_decrement);
221 bool inline_math_subtractExactL(bool is_decrement);
222 bool inline_exp();
223 bool inline_pow();
224 Node* finish_pow_exp(Node* result, Node* x, Node* y, const TypeFunc* call_type, address funcAddr, const char* funcName);
225 bool inline_min_max(vmIntrinsics::ID id);
226 Node* generate_min_max(vmIntrinsics::ID id, Node* x, Node* y);
227 // This returns Type::AnyPtr, RawPtr, or OopPtr.
228 int classify_unsafe_addr(Node* &base, Node* &offset);
229 Node* make_unsafe_address(Node* base, Node* offset);
230 // Helper for inline_unsafe_access.
231 // Generates the guards that check whether the result of
232 // Unsafe.getObject should be recorded in an SATB log buffer.
233 void insert_pre_barrier(Node* base_oop, Node* offset, Node* pre_val, bool need_mem_bar);
234 bool inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile);
235 bool inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static);
236 static bool klass_needs_init_guard(Node* kls);
237 bool inline_unsafe_allocate();
238 bool inline_unsafe_copyMemory();
239 bool inline_native_currentThread();
240 #ifdef TRACE_HAVE_INTRINSICS
241 bool inline_native_classID();
242 bool inline_native_threadID();
243 #endif
244 bool inline_native_time_funcs(address method, const char* funcName);
245 bool inline_native_isInterrupted();
246 bool inline_native_Class_query(vmIntrinsics::ID id);
247 bool inline_native_subtype_check();
248
249 bool inline_native_newArray();
250 bool inline_native_getLength();
251 bool inline_array_copyOf(bool is_copyOfRange);
252 bool inline_array_equals();
253 void copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array, bool card_mark);
254 bool inline_native_clone(bool is_virtual);
255 bool inline_native_Reflection_getCallerClass();
256 // Helper function for inlining native object hash method
257 bool inline_native_hashcode(bool is_virtual, bool is_static);
258 bool inline_native_getClass();
259
260 // Helper functions for inlining arraycopy
261 bool inline_arraycopy();
262 AllocateArrayNode* tightly_coupled_allocation(Node* ptr,
263 RegionNode* slow_region);
264 typedef enum { LS_xadd, LS_xchg, LS_cmpxchg } LoadStoreKind;
265 bool inline_unsafe_load_store(BasicType type, LoadStoreKind kind);
266 bool inline_unsafe_ordered_store(BasicType type);
267 bool inline_unsafe_fence(vmIntrinsics::ID id);
268 bool inline_fp_conversions(vmIntrinsics::ID id);
269 bool inline_number_methods(vmIntrinsics::ID id);
270 bool inline_reference_get();
271 bool inline_Class_cast();
272 bool inline_aescrypt_Block(vmIntrinsics::ID id);
273 bool inline_cipherBlockChaining_AESCrypt(vmIntrinsics::ID id);
274 Node* inline_cipherBlockChaining_AESCrypt_predicate(bool decrypting);
275 Node* get_key_start_from_aescrypt_object(Node* aescrypt_object);
276 Node* get_original_key_start_from_aescrypt_object(Node* aescrypt_object);
277 bool inline_sha_implCompress(vmIntrinsics::ID id);
278 bool inline_digestBase_implCompressMB(int predicate);
279 bool inline_sha_implCompressMB(Node* digestBaseObj, ciInstanceKlass* instklass_SHA,
280 bool long_state, address stubAddr, const char *stubName,
281 Node* src_start, Node* ofs, Node* limit);
282 Node* get_state_from_sha_object(Node *sha_object);
283 Node* get_state_from_sha5_object(Node *sha_object);
284 Node* inline_digestBase_implCompressMB_predicate(int predicate);
285 bool inline_encodeISOArray();
286 bool inline_updateCRC32();
287 bool inline_updateBytesCRC32();
288 bool inline_updateByteBufferCRC32();
289 bool inline_multiplyToLen();
290 };
291
292
293 //---------------------------make_vm_intrinsic----------------------------
294 CallGenerator* Compile::make_vm_intrinsic(ciMethod* m, bool is_virtual) {
295 vmIntrinsics::ID id = m->intrinsic_id();
296 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
297
298 ccstr disable_intr = NULL;
299
300 if ((DisableIntrinsic[0] != '\0'
301 && strstr(DisableIntrinsic, vmIntrinsics::name_at(id)) != NULL) ||
302 (method_has_option_value("DisableIntrinsic", disable_intr)
303 && strstr(disable_intr, vmIntrinsics::name_at(id)) != NULL)) {
304 // disabled by a user request on the command line:
305 // example: -XX:DisableIntrinsic=_hashCode,_getClass
306 return NULL;
307 }
308
309 if (!m->is_loaded()) {
310 // do not attempt to inline unloaded methods
311 return NULL;
312 }
313
314 // Only a few intrinsics implement a virtual dispatch.
315 // They are expensive calls which are also frequently overridden.
316 if (is_virtual) {
317 switch (id) {
318 case vmIntrinsics::_hashCode:
319 case vmIntrinsics::_clone:
320 // OK, Object.hashCode and Object.clone intrinsics come in both flavors
321 break;
322 default:
323 return NULL;
324 }
325 }
326
327 // -XX:-InlineNatives disables nearly all intrinsics:
328 if (!InlineNatives) {
329 switch (id) {
330 case vmIntrinsics::_indexOf:
331 case vmIntrinsics::_compareTo:
332 case vmIntrinsics::_equals:
333 case vmIntrinsics::_equalsC:
334 case vmIntrinsics::_getAndAddInt:
335 case vmIntrinsics::_getAndAddLong:
336 case vmIntrinsics::_getAndSetInt:
337 case vmIntrinsics::_getAndSetLong:
338 case vmIntrinsics::_getAndSetObject:
339 case vmIntrinsics::_loadFence:
340 case vmIntrinsics::_storeFence:
341 case vmIntrinsics::_fullFence:
342 break; // InlineNatives does not control String.compareTo
343 case vmIntrinsics::_Reference_get:
344 break; // InlineNatives does not control Reference.get
345 default:
346 return NULL;
347 }
348 }
349
350 int predicates = 0;
351 bool does_virtual_dispatch = false;
352
353 switch (id) {
354 case vmIntrinsics::_compareTo:
355 if (!SpecialStringCompareTo) return NULL;
356 if (!Matcher::match_rule_supported(Op_StrComp)) return NULL;
357 break;
358 case vmIntrinsics::_indexOf:
359 if (!SpecialStringIndexOf) return NULL;
360 break;
361 case vmIntrinsics::_equals:
362 if (!SpecialStringEquals) return NULL;
363 if (!Matcher::match_rule_supported(Op_StrEquals)) return NULL;
364 break;
365 case vmIntrinsics::_equalsC:
366 if (!SpecialArraysEquals) return NULL;
367 if (!Matcher::match_rule_supported(Op_AryEq)) return NULL;
368 break;
369 case vmIntrinsics::_arraycopy:
370 if (!InlineArrayCopy) return NULL;
371 break;
372 case vmIntrinsics::_copyMemory:
373 if (StubRoutines::unsafe_arraycopy() == NULL) return NULL;
374 if (!InlineArrayCopy) return NULL;
375 break;
376 case vmIntrinsics::_hashCode:
377 if (!InlineObjectHash) return NULL;
378 does_virtual_dispatch = true;
379 break;
380 case vmIntrinsics::_clone:
381 does_virtual_dispatch = true;
382 case vmIntrinsics::_copyOf:
383 case vmIntrinsics::_copyOfRange:
384 if (!InlineObjectCopy) return NULL;
385 // These also use the arraycopy intrinsic mechanism:
386 if (!InlineArrayCopy) return NULL;
387 break;
388 case vmIntrinsics::_encodeISOArray:
389 if (!SpecialEncodeISOArray) return NULL;
390 if (!Matcher::match_rule_supported(Op_EncodeISOArray)) return NULL;
391 break;
392 case vmIntrinsics::_checkIndex:
393 // We do not intrinsify this. The optimizer does fine with it.
394 return NULL;
395
396 case vmIntrinsics::_getCallerClass:
397 if (!InlineReflectionGetCallerClass) return NULL;
398 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) return NULL;
399 break;
400
401 case vmIntrinsics::_bitCount_i:
402 if (!Matcher::match_rule_supported(Op_PopCountI)) return NULL;
403 break;
404
405 case vmIntrinsics::_bitCount_l:
406 if (!Matcher::match_rule_supported(Op_PopCountL)) return NULL;
407 break;
408
409 case vmIntrinsics::_numberOfLeadingZeros_i:
410 if (!Matcher::match_rule_supported(Op_CountLeadingZerosI)) return NULL;
411 break;
412
413 case vmIntrinsics::_numberOfLeadingZeros_l:
414 if (!Matcher::match_rule_supported(Op_CountLeadingZerosL)) return NULL;
415 break;
416
417 case vmIntrinsics::_numberOfTrailingZeros_i:
418 if (!Matcher::match_rule_supported(Op_CountTrailingZerosI)) return NULL;
419 break;
420
421 case vmIntrinsics::_numberOfTrailingZeros_l:
422 if (!Matcher::match_rule_supported(Op_CountTrailingZerosL)) return NULL;
423 break;
424
425 case vmIntrinsics::_reverseBytes_c:
426 if (!Matcher::match_rule_supported(Op_ReverseBytesUS)) return NULL;
427 break;
428 case vmIntrinsics::_reverseBytes_s:
429 if (!Matcher::match_rule_supported(Op_ReverseBytesS)) return NULL;
430 break;
431 case vmIntrinsics::_reverseBytes_i:
432 if (!Matcher::match_rule_supported(Op_ReverseBytesI)) return NULL;
433 break;
434 case vmIntrinsics::_reverseBytes_l:
435 if (!Matcher::match_rule_supported(Op_ReverseBytesL)) return NULL;
436 break;
437
438 case vmIntrinsics::_Reference_get:
439 // Use the intrinsic version of Reference.get() so that the value in
440 // the referent field can be registered by the G1 pre-barrier code.
441 // Also add memory barrier to prevent commoning reads from this field
442 // across safepoint since GC can change it value.
443 break;
444
445 case vmIntrinsics::_compareAndSwapObject:
446 #ifdef _LP64
447 if (!UseCompressedOops && !Matcher::match_rule_supported(Op_CompareAndSwapP)) return NULL;
448 #endif
449 break;
450
451 case vmIntrinsics::_compareAndSwapLong:
452 if (!Matcher::match_rule_supported(Op_CompareAndSwapL)) return NULL;
453 break;
454
455 case vmIntrinsics::_getAndAddInt:
456 if (!Matcher::match_rule_supported(Op_GetAndAddI)) return NULL;
457 break;
458
459 case vmIntrinsics::_getAndAddLong:
460 if (!Matcher::match_rule_supported(Op_GetAndAddL)) return NULL;
461 break;
462
463 case vmIntrinsics::_getAndSetInt:
464 if (!Matcher::match_rule_supported(Op_GetAndSetI)) return NULL;
465 break;
466
467 case vmIntrinsics::_getAndSetLong:
468 if (!Matcher::match_rule_supported(Op_GetAndSetL)) return NULL;
469 break;
470
471 case vmIntrinsics::_getAndSetObject:
472 #ifdef _LP64
473 if (!UseCompressedOops && !Matcher::match_rule_supported(Op_GetAndSetP)) return NULL;
474 if (UseCompressedOops && !Matcher::match_rule_supported(Op_GetAndSetN)) return NULL;
475 break;
476 #else
477 if (!Matcher::match_rule_supported(Op_GetAndSetP)) return NULL;
478 break;
479 #endif
480
481 case vmIntrinsics::_aescrypt_encryptBlock:
482 case vmIntrinsics::_aescrypt_decryptBlock:
483 if (!UseAESIntrinsics) return NULL;
484 break;
485
486 case vmIntrinsics::_multiplyToLen:
487 if (!UseMultiplyToLenIntrinsic) return NULL;
488 break;
489
490 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
491 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
492 if (!UseAESIntrinsics) return NULL;
493 // these two require the predicated logic
494 predicates = 1;
495 break;
496
497 case vmIntrinsics::_sha_implCompress:
498 if (!UseSHA1Intrinsics) return NULL;
499 break;
500
501 case vmIntrinsics::_sha2_implCompress:
502 if (!UseSHA256Intrinsics) return NULL;
503 break;
504
505 case vmIntrinsics::_sha5_implCompress:
506 if (!UseSHA512Intrinsics) return NULL;
507 break;
508
509 case vmIntrinsics::_digestBase_implCompressMB:
510 if (!(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics)) return NULL;
511 predicates = 3;
512 break;
513
514 case vmIntrinsics::_updateCRC32:
515 case vmIntrinsics::_updateBytesCRC32:
516 case vmIntrinsics::_updateByteBufferCRC32:
517 if (!UseCRC32Intrinsics) return NULL;
518 break;
519
520 case vmIntrinsics::_incrementExactI:
521 case vmIntrinsics::_addExactI:
522 if (!Matcher::match_rule_supported(Op_OverflowAddI) || !UseMathExactIntrinsics) return NULL;
523 break;
524 case vmIntrinsics::_incrementExactL:
525 case vmIntrinsics::_addExactL:
526 if (!Matcher::match_rule_supported(Op_OverflowAddL) || !UseMathExactIntrinsics) return NULL;
527 break;
528 case vmIntrinsics::_decrementExactI:
529 case vmIntrinsics::_subtractExactI:
530 if (!Matcher::match_rule_supported(Op_OverflowSubI) || !UseMathExactIntrinsics) return NULL;
531 break;
532 case vmIntrinsics::_decrementExactL:
533 case vmIntrinsics::_subtractExactL:
534 if (!Matcher::match_rule_supported(Op_OverflowSubL) || !UseMathExactIntrinsics) return NULL;
535 break;
536 case vmIntrinsics::_negateExactI:
537 if (!Matcher::match_rule_supported(Op_OverflowSubI) || !UseMathExactIntrinsics) return NULL;
538 break;
539 case vmIntrinsics::_negateExactL:
540 if (!Matcher::match_rule_supported(Op_OverflowSubL) || !UseMathExactIntrinsics) return NULL;
541 break;
542 case vmIntrinsics::_multiplyExactI:
543 if (!Matcher::match_rule_supported(Op_OverflowMulI) || !UseMathExactIntrinsics) return NULL;
544 break;
545 case vmIntrinsics::_multiplyExactL:
546 if (!Matcher::match_rule_supported(Op_OverflowMulL) || !UseMathExactIntrinsics) return NULL;
547 break;
548
549 default:
550 assert(id <= vmIntrinsics::LAST_COMPILER_INLINE, "caller responsibility");
551 assert(id != vmIntrinsics::_Object_init && id != vmIntrinsics::_invoke, "enum out of order?");
552 break;
553 }
554
555 // -XX:-InlineClassNatives disables natives from the Class class.
556 // The flag applies to all reflective calls, notably Array.newArray
557 // (visible to Java programmers as Array.newInstance).
558 if (m->holder()->name() == ciSymbol::java_lang_Class() ||
559 m->holder()->name() == ciSymbol::java_lang_reflect_Array()) {
560 if (!InlineClassNatives) return NULL;
561 }
562
563 // -XX:-InlineThreadNatives disables natives from the Thread class.
564 if (m->holder()->name() == ciSymbol::java_lang_Thread()) {
565 if (!InlineThreadNatives) return NULL;
566 }
567
568 // -XX:-InlineMathNatives disables natives from the Math,Float and Double classes.
569 if (m->holder()->name() == ciSymbol::java_lang_Math() ||
570 m->holder()->name() == ciSymbol::java_lang_Float() ||
571 m->holder()->name() == ciSymbol::java_lang_Double()) {
572 if (!InlineMathNatives) return NULL;
573 }
574
575 // -XX:-InlineUnsafeOps disables natives from the Unsafe class.
576 if (m->holder()->name() == ciSymbol::sun_misc_Unsafe()) {
577 if (!InlineUnsafeOps) return NULL;
578 }
579
580 return new LibraryIntrinsic(m, is_virtual, predicates, does_virtual_dispatch, (vmIntrinsics::ID) id);
581 }
582
583 //----------------------register_library_intrinsics-----------------------
584 // Initialize this file's data structures, for each Compile instance.
585 void Compile::register_library_intrinsics() {
586 // Nothing to do here.
587 }
588
589 JVMState* LibraryIntrinsic::generate(JVMState* jvms) {
590 LibraryCallKit kit(jvms, this);
591 Compile* C = kit.C;
592 int nodes = C->unique();
593 #ifndef PRODUCT
594 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) {
595 char buf[1000];
596 const char* str = vmIntrinsics::short_name_as_C_string(intrinsic_id(), buf, sizeof(buf));
597 tty->print_cr("Intrinsic %s", str);
598 }
599 #endif
600 ciMethod* callee = kit.callee();
601 const int bci = kit.bci();
602
603 // Try to inline the intrinsic.
604 if (kit.try_to_inline(_last_predicate)) {
605 if (C->print_intrinsics() || C->print_inlining()) {
606 C->print_inlining(callee, jvms->depth() - 1, bci, is_virtual() ? "(intrinsic, virtual)" : "(intrinsic)");
607 }
608 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_worked);
609 if (C->log()) {
610 C->log()->elem("intrinsic id='%s'%s nodes='%d'",
611 vmIntrinsics::name_at(intrinsic_id()),
612 (is_virtual() ? " virtual='1'" : ""),
613 C->unique() - nodes);
614 }
615 // Push the result from the inlined method onto the stack.
616 kit.push_result();
617 C->print_inlining_update(this);
618 return kit.transfer_exceptions_into_jvms();
619 }
620
621 // The intrinsic bailed out
622 if (C->print_intrinsics() || C->print_inlining()) {
623 if (jvms->has_method()) {
624 // Not a root compile.
625 const char* msg = is_virtual() ? "failed to inline (intrinsic, virtual)" : "failed to inline (intrinsic)";
626 C->print_inlining(callee, jvms->depth() - 1, bci, msg);
627 } else {
628 // Root compile
629 tty->print("Did not generate intrinsic %s%s at bci:%d in",
630 vmIntrinsics::name_at(intrinsic_id()),
631 (is_virtual() ? " (virtual)" : ""), bci);
632 }
633 }
634 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_failed);
635 C->print_inlining_update(this);
636 return NULL;
637 }
638
639 Node* LibraryIntrinsic::generate_predicate(JVMState* jvms, int predicate) {
640 LibraryCallKit kit(jvms, this);
641 Compile* C = kit.C;
642 int nodes = C->unique();
643 _last_predicate = predicate;
644 #ifndef PRODUCT
645 assert(is_predicated() && predicate < predicates_count(), "sanity");
646 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) {
647 char buf[1000];
648 const char* str = vmIntrinsics::short_name_as_C_string(intrinsic_id(), buf, sizeof(buf));
649 tty->print_cr("Predicate for intrinsic %s", str);
650 }
651 #endif
652 ciMethod* callee = kit.callee();
653 const int bci = kit.bci();
654
655 Node* slow_ctl = kit.try_to_predicate(predicate);
656 if (!kit.failing()) {
657 if (C->print_intrinsics() || C->print_inlining()) {
658 C->print_inlining(callee, jvms->depth() - 1, bci, is_virtual() ? "(intrinsic, virtual, predicate)" : "(intrinsic, predicate)");
659 }
660 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_worked);
661 if (C->log()) {
662 C->log()->elem("predicate_intrinsic id='%s'%s nodes='%d'",
663 vmIntrinsics::name_at(intrinsic_id()),
664 (is_virtual() ? " virtual='1'" : ""),
665 C->unique() - nodes);
666 }
667 return slow_ctl; // Could be NULL if the check folds.
668 }
669
670 // The intrinsic bailed out
671 if (C->print_intrinsics() || C->print_inlining()) {
672 if (jvms->has_method()) {
673 // Not a root compile.
674 const char* msg = "failed to generate predicate for intrinsic";
675 C->print_inlining(kit.callee(), jvms->depth() - 1, bci, msg);
676 } else {
677 // Root compile
678 C->print_inlining_stream()->print("Did not generate predicate for intrinsic %s%s at bci:%d in",
679 vmIntrinsics::name_at(intrinsic_id()),
680 (is_virtual() ? " (virtual)" : ""), bci);
681 }
682 }
683 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_failed);
684 return NULL;
685 }
686
687 bool LibraryCallKit::try_to_inline(int predicate) {
688 // Handle symbolic names for otherwise undistinguished boolean switches:
689 const bool is_store = true;
690 const bool is_native_ptr = true;
691 const bool is_static = true;
692 const bool is_volatile = true;
693
694 if (!jvms()->has_method()) {
695 // Root JVMState has a null method.
696 assert(map()->memory()->Opcode() == Op_Parm, "");
697 // Insert the memory aliasing node
698 set_all_memory(reset_memory());
699 }
700 assert(merged_memory(), "");
701
702
703 switch (intrinsic_id()) {
704 case vmIntrinsics::_hashCode: return inline_native_hashcode(intrinsic()->is_virtual(), !is_static);
705 case vmIntrinsics::_identityHashCode: return inline_native_hashcode(/*!virtual*/ false, is_static);
706 case vmIntrinsics::_getClass: return inline_native_getClass();
707
708 case vmIntrinsics::_dsin:
709 case vmIntrinsics::_dcos:
710 case vmIntrinsics::_dtan:
711 case vmIntrinsics::_dabs:
712 case vmIntrinsics::_datan2:
713 case vmIntrinsics::_dsqrt:
714 case vmIntrinsics::_dexp:
715 case vmIntrinsics::_dlog:
716 case vmIntrinsics::_dlog10:
717 case vmIntrinsics::_dpow: return inline_math_native(intrinsic_id());
718
719 case vmIntrinsics::_min:
720 case vmIntrinsics::_max: return inline_min_max(intrinsic_id());
721
722 case vmIntrinsics::_addExactI: return inline_math_addExactI(false /* add */);
723 case vmIntrinsics::_addExactL: return inline_math_addExactL(false /* add */);
724 case vmIntrinsics::_decrementExactI: return inline_math_subtractExactI(true /* decrement */);
725 case vmIntrinsics::_decrementExactL: return inline_math_subtractExactL(true /* decrement */);
726 case vmIntrinsics::_incrementExactI: return inline_math_addExactI(true /* increment */);
727 case vmIntrinsics::_incrementExactL: return inline_math_addExactL(true /* increment */);
728 case vmIntrinsics::_multiplyExactI: return inline_math_multiplyExactI();
729 case vmIntrinsics::_multiplyExactL: return inline_math_multiplyExactL();
730 case vmIntrinsics::_negateExactI: return inline_math_negateExactI();
731 case vmIntrinsics::_negateExactL: return inline_math_negateExactL();
732 case vmIntrinsics::_subtractExactI: return inline_math_subtractExactI(false /* subtract */);
733 case vmIntrinsics::_subtractExactL: return inline_math_subtractExactL(false /* subtract */);
734
735 case vmIntrinsics::_arraycopy: return inline_arraycopy();
736
737 case vmIntrinsics::_compareTo: return inline_string_compareTo();
738 case vmIntrinsics::_indexOf: return inline_string_indexOf();
739 case vmIntrinsics::_equals: return inline_string_equals();
740
741 case vmIntrinsics::_getObject: return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, !is_volatile);
742 case vmIntrinsics::_getBoolean: return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, !is_volatile);
743 case vmIntrinsics::_getByte: return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, !is_volatile);
744 case vmIntrinsics::_getShort: return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, !is_volatile);
745 case vmIntrinsics::_getChar: return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, !is_volatile);
746 case vmIntrinsics::_getInt: return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, !is_volatile);
747 case vmIntrinsics::_getLong: return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, !is_volatile);
748 case vmIntrinsics::_getFloat: return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, !is_volatile);
749 case vmIntrinsics::_getDouble: return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, !is_volatile);
750
751 case vmIntrinsics::_putObject: return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, !is_volatile);
752 case vmIntrinsics::_putBoolean: return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, !is_volatile);
753 case vmIntrinsics::_putByte: return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, !is_volatile);
754 case vmIntrinsics::_putShort: return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, !is_volatile);
755 case vmIntrinsics::_putChar: return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, !is_volatile);
756 case vmIntrinsics::_putInt: return inline_unsafe_access(!is_native_ptr, is_store, T_INT, !is_volatile);
757 case vmIntrinsics::_putLong: return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, !is_volatile);
758 case vmIntrinsics::_putFloat: return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, !is_volatile);
759 case vmIntrinsics::_putDouble: return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, !is_volatile);
760
761 case vmIntrinsics::_getByte_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_BYTE, !is_volatile);
762 case vmIntrinsics::_getShort_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_SHORT, !is_volatile);
763 case vmIntrinsics::_getChar_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_CHAR, !is_volatile);
764 case vmIntrinsics::_getInt_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_INT, !is_volatile);
765 case vmIntrinsics::_getLong_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_LONG, !is_volatile);
766 case vmIntrinsics::_getFloat_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_FLOAT, !is_volatile);
767 case vmIntrinsics::_getDouble_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_DOUBLE, !is_volatile);
768 case vmIntrinsics::_getAddress_raw: return inline_unsafe_access( is_native_ptr, !is_store, T_ADDRESS, !is_volatile);
769
770 case vmIntrinsics::_putByte_raw: return inline_unsafe_access( is_native_ptr, is_store, T_BYTE, !is_volatile);
771 case vmIntrinsics::_putShort_raw: return inline_unsafe_access( is_native_ptr, is_store, T_SHORT, !is_volatile);
772 case vmIntrinsics::_putChar_raw: return inline_unsafe_access( is_native_ptr, is_store, T_CHAR, !is_volatile);
773 case vmIntrinsics::_putInt_raw: return inline_unsafe_access( is_native_ptr, is_store, T_INT, !is_volatile);
774 case vmIntrinsics::_putLong_raw: return inline_unsafe_access( is_native_ptr, is_store, T_LONG, !is_volatile);
775 case vmIntrinsics::_putFloat_raw: return inline_unsafe_access( is_native_ptr, is_store, T_FLOAT, !is_volatile);
776 case vmIntrinsics::_putDouble_raw: return inline_unsafe_access( is_native_ptr, is_store, T_DOUBLE, !is_volatile);
777 case vmIntrinsics::_putAddress_raw: return inline_unsafe_access( is_native_ptr, is_store, T_ADDRESS, !is_volatile);
778
779 case vmIntrinsics::_getObjectVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, is_volatile);
780 case vmIntrinsics::_getBooleanVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, is_volatile);
781 case vmIntrinsics::_getByteVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, is_volatile);
782 case vmIntrinsics::_getShortVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, is_volatile);
783 case vmIntrinsics::_getCharVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, is_volatile);
784 case vmIntrinsics::_getIntVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, is_volatile);
785 case vmIntrinsics::_getLongVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, is_volatile);
786 case vmIntrinsics::_getFloatVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, is_volatile);
787 case vmIntrinsics::_getDoubleVolatile: return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, is_volatile);
788
789 case vmIntrinsics::_putObjectVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, is_volatile);
790 case vmIntrinsics::_putBooleanVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, is_volatile);
791 case vmIntrinsics::_putByteVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, is_volatile);
792 case vmIntrinsics::_putShortVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, is_volatile);
793 case vmIntrinsics::_putCharVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, is_volatile);
794 case vmIntrinsics::_putIntVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_INT, is_volatile);
795 case vmIntrinsics::_putLongVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, is_volatile);
796 case vmIntrinsics::_putFloatVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, is_volatile);
797 case vmIntrinsics::_putDoubleVolatile: return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, is_volatile);
798
799 case vmIntrinsics::_prefetchRead: return inline_unsafe_prefetch(!is_native_ptr, !is_store, !is_static);
800 case vmIntrinsics::_prefetchWrite: return inline_unsafe_prefetch(!is_native_ptr, is_store, !is_static);
801 case vmIntrinsics::_prefetchReadStatic: return inline_unsafe_prefetch(!is_native_ptr, !is_store, is_static);
802 case vmIntrinsics::_prefetchWriteStatic: return inline_unsafe_prefetch(!is_native_ptr, is_store, is_static);
803
804 case vmIntrinsics::_compareAndSwapObject: return inline_unsafe_load_store(T_OBJECT, LS_cmpxchg);
805 case vmIntrinsics::_compareAndSwapInt: return inline_unsafe_load_store(T_INT, LS_cmpxchg);
806 case vmIntrinsics::_compareAndSwapLong: return inline_unsafe_load_store(T_LONG, LS_cmpxchg);
807
808 case vmIntrinsics::_putOrderedObject: return inline_unsafe_ordered_store(T_OBJECT);
809 case vmIntrinsics::_putOrderedInt: return inline_unsafe_ordered_store(T_INT);
810 case vmIntrinsics::_putOrderedLong: return inline_unsafe_ordered_store(T_LONG);
811
812 case vmIntrinsics::_getAndAddInt: return inline_unsafe_load_store(T_INT, LS_xadd);
813 case vmIntrinsics::_getAndAddLong: return inline_unsafe_load_store(T_LONG, LS_xadd);
814 case vmIntrinsics::_getAndSetInt: return inline_unsafe_load_store(T_INT, LS_xchg);
815 case vmIntrinsics::_getAndSetLong: return inline_unsafe_load_store(T_LONG, LS_xchg);
816 case vmIntrinsics::_getAndSetObject: return inline_unsafe_load_store(T_OBJECT, LS_xchg);
817
818 case vmIntrinsics::_loadFence:
819 case vmIntrinsics::_storeFence:
820 case vmIntrinsics::_fullFence: return inline_unsafe_fence(intrinsic_id());
821
822 case vmIntrinsics::_currentThread: return inline_native_currentThread();
823 case vmIntrinsics::_isInterrupted: return inline_native_isInterrupted();
824
825 #ifdef TRACE_HAVE_INTRINSICS
826 case vmIntrinsics::_classID: return inline_native_classID();
827 case vmIntrinsics::_threadID: return inline_native_threadID();
828 case vmIntrinsics::_counterTime: return inline_native_time_funcs(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), "counterTime");
829 #endif
830 case vmIntrinsics::_currentTimeMillis: return inline_native_time_funcs(CAST_FROM_FN_PTR(address, os::javaTimeMillis), "currentTimeMillis");
831 case vmIntrinsics::_nanoTime: return inline_native_time_funcs(CAST_FROM_FN_PTR(address, os::javaTimeNanos), "nanoTime");
832 case vmIntrinsics::_allocateInstance: return inline_unsafe_allocate();
833 case vmIntrinsics::_copyMemory: return inline_unsafe_copyMemory();
834 case vmIntrinsics::_newArray: return inline_native_newArray();
835 case vmIntrinsics::_getLength: return inline_native_getLength();
836 case vmIntrinsics::_copyOf: return inline_array_copyOf(false);
837 case vmIntrinsics::_copyOfRange: return inline_array_copyOf(true);
838 case vmIntrinsics::_equalsC: return inline_array_equals();
839 case vmIntrinsics::_clone: return inline_native_clone(intrinsic()->is_virtual());
840
841 case vmIntrinsics::_isAssignableFrom: return inline_native_subtype_check();
842
843 case vmIntrinsics::_isInstance:
844 case vmIntrinsics::_getModifiers:
845 case vmIntrinsics::_isInterface:
846 case vmIntrinsics::_isArray:
847 case vmIntrinsics::_isPrimitive:
848 case vmIntrinsics::_getSuperclass:
849 case vmIntrinsics::_getClassAccessFlags: return inline_native_Class_query(intrinsic_id());
850
851 case vmIntrinsics::_floatToRawIntBits:
852 case vmIntrinsics::_floatToIntBits:
853 case vmIntrinsics::_intBitsToFloat:
854 case vmIntrinsics::_doubleToRawLongBits:
855 case vmIntrinsics::_doubleToLongBits:
856 case vmIntrinsics::_longBitsToDouble: return inline_fp_conversions(intrinsic_id());
857
858 case vmIntrinsics::_numberOfLeadingZeros_i:
859 case vmIntrinsics::_numberOfLeadingZeros_l:
860 case vmIntrinsics::_numberOfTrailingZeros_i:
861 case vmIntrinsics::_numberOfTrailingZeros_l:
862 case vmIntrinsics::_bitCount_i:
863 case vmIntrinsics::_bitCount_l:
864 case vmIntrinsics::_reverseBytes_i:
865 case vmIntrinsics::_reverseBytes_l:
866 case vmIntrinsics::_reverseBytes_s:
867 case vmIntrinsics::_reverseBytes_c: return inline_number_methods(intrinsic_id());
868
869 case vmIntrinsics::_getCallerClass: return inline_native_Reflection_getCallerClass();
870
871 case vmIntrinsics::_Reference_get: return inline_reference_get();
872
873 case vmIntrinsics::_class_cast: return inline_Class_cast();
874
875 case vmIntrinsics::_aescrypt_encryptBlock:
876 case vmIntrinsics::_aescrypt_decryptBlock: return inline_aescrypt_Block(intrinsic_id());
877
878 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
879 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
880 return inline_cipherBlockChaining_AESCrypt(intrinsic_id());
881
882 case vmIntrinsics::_sha_implCompress:
883 case vmIntrinsics::_sha2_implCompress:
884 case vmIntrinsics::_sha5_implCompress:
885 return inline_sha_implCompress(intrinsic_id());
886
887 case vmIntrinsics::_digestBase_implCompressMB:
888 return inline_digestBase_implCompressMB(predicate);
889
890 case vmIntrinsics::_multiplyToLen:
891 return inline_multiplyToLen();
892
893 case vmIntrinsics::_encodeISOArray:
894 return inline_encodeISOArray();
895
896 case vmIntrinsics::_updateCRC32:
897 return inline_updateCRC32();
898 case vmIntrinsics::_updateBytesCRC32:
899 return inline_updateBytesCRC32();
900 case vmIntrinsics::_updateByteBufferCRC32:
901 return inline_updateByteBufferCRC32();
902
903 default:
904 // If you get here, it may be that someone has added a new intrinsic
905 // to the list in vmSymbols.hpp without implementing it here.
906 #ifndef PRODUCT
907 if ((PrintMiscellaneous && (Verbose || WizardMode)) || PrintOpto) {
908 tty->print_cr("*** Warning: Unimplemented intrinsic %s(%d)",
909 vmIntrinsics::name_at(intrinsic_id()), intrinsic_id());
910 }
911 #endif
912 return false;
913 }
914 }
915
916 Node* LibraryCallKit::try_to_predicate(int predicate) {
917 if (!jvms()->has_method()) {
918 // Root JVMState has a null method.
919 assert(map()->memory()->Opcode() == Op_Parm, "");
920 // Insert the memory aliasing node
921 set_all_memory(reset_memory());
922 }
923 assert(merged_memory(), "");
924
925 switch (intrinsic_id()) {
926 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
927 return inline_cipherBlockChaining_AESCrypt_predicate(false);
928 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
929 return inline_cipherBlockChaining_AESCrypt_predicate(true);
930 case vmIntrinsics::_digestBase_implCompressMB:
931 return inline_digestBase_implCompressMB_predicate(predicate);
932
933 default:
934 // If you get here, it may be that someone has added a new intrinsic
935 // to the list in vmSymbols.hpp without implementing it here.
936 #ifndef PRODUCT
937 if ((PrintMiscellaneous && (Verbose || WizardMode)) || PrintOpto) {
938 tty->print_cr("*** Warning: Unimplemented predicate for intrinsic %s(%d)",
939 vmIntrinsics::name_at(intrinsic_id()), intrinsic_id());
940 }
941 #endif
942 Node* slow_ctl = control();
943 set_control(top()); // No fast path instrinsic
944 return slow_ctl;
945 }
946 }
947
948 //------------------------------set_result-------------------------------
949 // Helper function for finishing intrinsics.
950 void LibraryCallKit::set_result(RegionNode* region, PhiNode* value) {
951 record_for_igvn(region);
952 set_control(_gvn.transform(region));
953 set_result( _gvn.transform(value));
954 assert(value->type()->basic_type() == result()->bottom_type()->basic_type(), "sanity");
955 }
956
957 //------------------------------generate_guard---------------------------
958 // Helper function for generating guarded fast-slow graph structures.
959 // The given 'test', if true, guards a slow path. If the test fails
960 // then a fast path can be taken. (We generally hope it fails.)
961 // In all cases, GraphKit::control() is updated to the fast path.
962 // The returned value represents the control for the slow path.
963 // The return value is never 'top'; it is either a valid control
964 // or NULL if it is obvious that the slow path can never be taken.
965 // Also, if region and the slow control are not NULL, the slow edge
966 // is appended to the region.
967 Node* LibraryCallKit::generate_guard(Node* test, RegionNode* region, float true_prob) {
968 if (stopped()) {
969 // Already short circuited.
970 return NULL;
971 }
972
973 // Build an if node and its projections.
974 // If test is true we take the slow path, which we assume is uncommon.
975 if (_gvn.type(test) == TypeInt::ZERO) {
976 // The slow branch is never taken. No need to build this guard.
977 return NULL;
978 }
979
980 IfNode* iff = create_and_map_if(control(), test, true_prob, COUNT_UNKNOWN);
981
982 Node* if_slow = _gvn.transform(new IfTrueNode(iff));
983 if (if_slow == top()) {
984 // The slow branch is never taken. No need to build this guard.
985 return NULL;
986 }
987
988 if (region != NULL)
989 region->add_req(if_slow);
990
991 Node* if_fast = _gvn.transform(new IfFalseNode(iff));
992 set_control(if_fast);
993
994 return if_slow;
995 }
996
997 inline Node* LibraryCallKit::generate_slow_guard(Node* test, RegionNode* region) {
998 return generate_guard(test, region, PROB_UNLIKELY_MAG(3));
999 }
1000 inline Node* LibraryCallKit::generate_fair_guard(Node* test, RegionNode* region) {
1001 return generate_guard(test, region, PROB_FAIR);
1002 }
1003
1004 inline Node* LibraryCallKit::generate_negative_guard(Node* index, RegionNode* region,
1005 Node* *pos_index) {
1006 if (stopped())
1007 return NULL; // already stopped
1008 if (_gvn.type(index)->higher_equal(TypeInt::POS)) // [0,maxint]
1009 return NULL; // index is already adequately typed
1010 Node* cmp_lt = _gvn.transform(new CmpINode(index, intcon(0)));
1011 Node* bol_lt = _gvn.transform(new BoolNode(cmp_lt, BoolTest::lt));
1012 Node* is_neg = generate_guard(bol_lt, region, PROB_MIN);
1013 if (is_neg != NULL && pos_index != NULL) {
1014 // Emulate effect of Parse::adjust_map_after_if.
1015 Node* ccast = new CastIINode(index, TypeInt::POS);
1016 ccast->set_req(0, control());
1017 (*pos_index) = _gvn.transform(ccast);
1018 }
1019 return is_neg;
1020 }
1021
1022 // Make sure that 'position' is a valid limit index, in [0..length].
1023 // There are two equivalent plans for checking this:
1024 // A. (offset + copyLength) unsigned<= arrayLength
1025 // B. offset <= (arrayLength - copyLength)
1026 // We require that all of the values above, except for the sum and
1027 // difference, are already known to be non-negative.
1028 // Plan A is robust in the face of overflow, if offset and copyLength
1029 // are both hugely positive.
1030 //
1031 // Plan B is less direct and intuitive, but it does not overflow at
1032 // all, since the difference of two non-negatives is always
1033 // representable. Whenever Java methods must perform the equivalent
1034 // check they generally use Plan B instead of Plan A.
1035 // For the moment we use Plan A.
1036 inline Node* LibraryCallKit::generate_limit_guard(Node* offset,
1037 Node* subseq_length,
1038 Node* array_length,
1039 RegionNode* region) {
1040 if (stopped())
1041 return NULL; // already stopped
1042 bool zero_offset = _gvn.type(offset) == TypeInt::ZERO;
1043 if (zero_offset && subseq_length->eqv_uncast(array_length))
1044 return NULL; // common case of whole-array copy
1045 Node* last = subseq_length;
1046 if (!zero_offset) // last += offset
1047 last = _gvn.transform(new AddINode(last, offset));
1048 Node* cmp_lt = _gvn.transform(new CmpUNode(array_length, last));
1049 Node* bol_lt = _gvn.transform(new BoolNode(cmp_lt, BoolTest::lt));
1050 Node* is_over = generate_guard(bol_lt, region, PROB_MIN);
1051 return is_over;
1052 }
1053
1054
1055 //--------------------------generate_current_thread--------------------
1056 Node* LibraryCallKit::generate_current_thread(Node* &tls_output) {
1057 ciKlass* thread_klass = env()->Thread_klass();
1058 const Type* thread_type = TypeOopPtr::make_from_klass(thread_klass)->cast_to_ptr_type(TypePtr::NotNull);
1059 Node* thread = _gvn.transform(new ThreadLocalNode());
1060 Node* p = basic_plus_adr(top()/*!oop*/, thread, in_bytes(JavaThread::threadObj_offset()));
1061 Node* threadObj = make_load(NULL, p, thread_type, T_OBJECT, MemNode::unordered);
1062 tls_output = thread;
1063 return threadObj;
1064 }
1065
1066
1067 //------------------------------make_string_method_node------------------------
1068 // Helper method for String intrinsic functions. This version is called
1069 // with str1 and str2 pointing to String object nodes.
1070 //
1071 Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1, Node* str2) {
1072 Node* no_ctrl = NULL;
1073
1074 // Get start addr of string
1075 Node* str1_value = load_String_value(no_ctrl, str1);
1076 Node* str1_offset = load_String_offset(no_ctrl, str1);
1077 Node* str1_start = array_element_address(str1_value, str1_offset, T_CHAR);
1078
1079 // Get length of string 1
1080 Node* str1_len = load_String_length(no_ctrl, str1);
1081
1082 Node* str2_value = load_String_value(no_ctrl, str2);
1083 Node* str2_offset = load_String_offset(no_ctrl, str2);
1084 Node* str2_start = array_element_address(str2_value, str2_offset, T_CHAR);
1085
1086 Node* str2_len = NULL;
1087 Node* result = NULL;
1088
1089 switch (opcode) {
1090 case Op_StrIndexOf:
1091 // Get length of string 2
1092 str2_len = load_String_length(no_ctrl, str2);
1093
1094 result = new StrIndexOfNode(control(), memory(TypeAryPtr::CHARS),
1095 str1_start, str1_len, str2_start, str2_len);
1096 break;
1097 case Op_StrComp:
1098 // Get length of string 2
1099 str2_len = load_String_length(no_ctrl, str2);
1100
1101 result = new StrCompNode(control(), memory(TypeAryPtr::CHARS),
1102 str1_start, str1_len, str2_start, str2_len);
1103 break;
1104 case Op_StrEquals:
1105 result = new StrEqualsNode(control(), memory(TypeAryPtr::CHARS),
1106 str1_start, str2_start, str1_len);
1107 break;
1108 default:
1109 ShouldNotReachHere();
1110 return NULL;
1111 }
1112
1113 // All these intrinsics have checks.
1114 C->set_has_split_ifs(true); // Has chance for split-if optimization
1115
1116 return _gvn.transform(result);
1117 }
1118
1119 // Helper method for String intrinsic functions. This version is called
1120 // with str1 and str2 pointing to char[] nodes, with cnt1 and cnt2 pointing
1121 // to Int nodes containing the lenghts of str1 and str2.
1122 //
1123 Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2) {
1124 Node* result = NULL;
1125 switch (opcode) {
1126 case Op_StrIndexOf:
1127 result = new StrIndexOfNode(control(), memory(TypeAryPtr::CHARS),
1128 str1_start, cnt1, str2_start, cnt2);
1129 break;
1130 case Op_StrComp:
1131 result = new StrCompNode(control(), memory(TypeAryPtr::CHARS),
1132 str1_start, cnt1, str2_start, cnt2);
1133 break;
1134 case Op_StrEquals:
1135 result = new StrEqualsNode(control(), memory(TypeAryPtr::CHARS),
1136 str1_start, str2_start, cnt1);
1137 break;
1138 default:
1139 ShouldNotReachHere();
1140 return NULL;
1141 }
1142
1143 // All these intrinsics have checks.
1144 C->set_has_split_ifs(true); // Has chance for split-if optimization
1145
1146 return _gvn.transform(result);
1147 }
1148
1149 //------------------------------inline_string_compareTo------------------------
1150 // public int java.lang.String.compareTo(String anotherString);
1151 bool LibraryCallKit::inline_string_compareTo() {
1152 Node* receiver = null_check(argument(0));
1153 Node* arg = null_check(argument(1));
1154 if (stopped()) {
1155 return true;
1156 }
1157 set_result(make_string_method_node(Op_StrComp, receiver, arg));
1158 return true;
1159 }
1160
1161 //------------------------------inline_string_equals------------------------
1162 bool LibraryCallKit::inline_string_equals() {
1163 Node* receiver = null_check_receiver();
1164 // NOTE: Do not null check argument for String.equals() because spec
1165 // allows to specify NULL as argument.
1166 Node* argument = this->argument(1);
1167 if (stopped()) {
1168 return true;
1169 }
1170
1171 // paths (plus control) merge
1172 RegionNode* region = new RegionNode(5);
1173 Node* phi = new PhiNode(region, TypeInt::BOOL);
1174
1175 // does source == target string?
1176 Node* cmp = _gvn.transform(new CmpPNode(receiver, argument));
1177 Node* bol = _gvn.transform(new BoolNode(cmp, BoolTest::eq));
1178
1179 Node* if_eq = generate_slow_guard(bol, NULL);
1180 if (if_eq != NULL) {
1181 // receiver == argument
1182 phi->init_req(2, intcon(1));
1183 region->init_req(2, if_eq);
1184 }
1185
1186 // get String klass for instanceOf
1187 ciInstanceKlass* klass = env()->String_klass();
1188
1189 if (!stopped()) {
1190 Node* inst = gen_instanceof(argument, makecon(TypeKlassPtr::make(klass)));
1191 Node* cmp = _gvn.transform(new CmpINode(inst, intcon(1)));
1192 Node* bol = _gvn.transform(new BoolNode(cmp, BoolTest::ne));
1193
1194 Node* inst_false = generate_guard(bol, NULL, PROB_MIN);
1195 //instanceOf == true, fallthrough
1196
1197 if (inst_false != NULL) {
1198 phi->init_req(3, intcon(0));
1199 region->init_req(3, inst_false);
1200 }
1201 }
1202
1203 if (!stopped()) {
1204 const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass);
1205
1206 // Properly cast the argument to String
1207 argument = _gvn.transform(new CheckCastPPNode(control(), argument, string_type));
1208 // This path is taken only when argument's type is String:NotNull.
1209 argument = cast_not_null(argument, false);
1210
1211 Node* no_ctrl = NULL;
1212
1213 // Get start addr of receiver
1214 Node* receiver_val = load_String_value(no_ctrl, receiver);
1215 Node* receiver_offset = load_String_offset(no_ctrl, receiver);
1216 Node* receiver_start = array_element_address(receiver_val, receiver_offset, T_CHAR);
1217
1218 // Get length of receiver
1219 Node* receiver_cnt = load_String_length(no_ctrl, receiver);
1220
1221 // Get start addr of argument
1222 Node* argument_val = load_String_value(no_ctrl, argument);
1223 Node* argument_offset = load_String_offset(no_ctrl, argument);
1224 Node* argument_start = array_element_address(argument_val, argument_offset, T_CHAR);
1225
1226 // Get length of argument
1227 Node* argument_cnt = load_String_length(no_ctrl, argument);
1228
1229 // Check for receiver count != argument count
1230 Node* cmp = _gvn.transform(new CmpINode(receiver_cnt, argument_cnt));
1231 Node* bol = _gvn.transform(new BoolNode(cmp, BoolTest::ne));
1232 Node* if_ne = generate_slow_guard(bol, NULL);
1233 if (if_ne != NULL) {
1234 phi->init_req(4, intcon(0));
1235 region->init_req(4, if_ne);
1236 }
1237
1238 // Check for count == 0 is done by assembler code for StrEquals.
1239
1240 if (!stopped()) {
1241 Node* equals = make_string_method_node(Op_StrEquals, receiver_start, receiver_cnt, argument_start, argument_cnt);
1242 phi->init_req(1, equals);
1243 region->init_req(1, control());
1244 }
1245 }
1246
1247 // post merge
1248 set_control(_gvn.transform(region));
1249 record_for_igvn(region);
1250
1251 set_result(_gvn.transform(phi));
1252 return true;
1253 }
1254
1255 //------------------------------inline_array_equals----------------------------
1256 bool LibraryCallKit::inline_array_equals() {
1257 Node* arg1 = argument(0);
1258 Node* arg2 = argument(1);
1259 set_result(_gvn.transform(new AryEqNode(control(), memory(TypeAryPtr::CHARS), arg1, arg2)));
1260 return true;
1261 }
1262
1263 // Java version of String.indexOf(constant string)
1264 // class StringDecl {
1265 // StringDecl(char[] ca) {
1266 // offset = 0;
1267 // count = ca.length;
1268 // value = ca;
1269 // }
1270 // int offset;
1271 // int count;
1272 // char[] value;
1273 // }
1274 //
1275 // static int string_indexOf_J(StringDecl string_object, char[] target_object,
1276 // int targetOffset, int cache_i, int md2) {
1277 // int cache = cache_i;
1278 // int sourceOffset = string_object.offset;
1279 // int sourceCount = string_object.count;
1280 // int targetCount = target_object.length;
1281 //
1282 // int targetCountLess1 = targetCount - 1;
1283 // int sourceEnd = sourceOffset + sourceCount - targetCountLess1;
1284 //
1285 // char[] source = string_object.value;
1286 // char[] target = target_object;
1287 // int lastChar = target[targetCountLess1];
1288 //
1289 // outer_loop:
1290 // for (int i = sourceOffset; i < sourceEnd; ) {
1291 // int src = source[i + targetCountLess1];
1292 // if (src == lastChar) {
1293 // // With random strings and a 4-character alphabet,
1294 // // reverse matching at this point sets up 0.8% fewer
1295 // // frames, but (paradoxically) makes 0.3% more probes.
1296 // // Since those probes are nearer the lastChar probe,
1297 // // there is may be a net D$ win with reverse matching.
1298 // // But, reversing loop inhibits unroll of inner loop
1299 // // for unknown reason. So, does running outer loop from
1300 // // (sourceOffset - targetCountLess1) to (sourceOffset + sourceCount)
1301 // for (int j = 0; j < targetCountLess1; j++) {
1302 // if (target[targetOffset + j] != source[i+j]) {
1303 // if ((cache & (1 << source[i+j])) == 0) {
1304 // if (md2 < j+1) {
1305 // i += j+1;
1306 // continue outer_loop;
1307 // }
1308 // }
1309 // i += md2;
1310 // continue outer_loop;
1311 // }
1312 // }
1313 // return i - sourceOffset;
1314 // }
1315 // if ((cache & (1 << src)) == 0) {
1316 // i += targetCountLess1;
1317 // } // using "i += targetCount;" and an "else i++;" causes a jump to jump.
1318 // i++;
1319 // }
1320 // return -1;
1321 // }
1322
1323 //------------------------------string_indexOf------------------------
1324 Node* LibraryCallKit::string_indexOf(Node* string_object, ciTypeArray* target_array, jint targetOffset_i,
1325 jint cache_i, jint md2_i) {
1326
1327 Node* no_ctrl = NULL;
1328 float likely = PROB_LIKELY(0.9);
1329 float unlikely = PROB_UNLIKELY(0.9);
1330
1331 const int nargs = 0; // no arguments to push back for uncommon trap in predicate
1332
1333 Node* source = load_String_value(no_ctrl, string_object);
1334 Node* sourceOffset = load_String_offset(no_ctrl, string_object);
1335 Node* sourceCount = load_String_length(no_ctrl, string_object);
1336
1337 Node* target = _gvn.transform( makecon(TypeOopPtr::make_from_constant(target_array, true)));
1338 jint target_length = target_array->length();
1339 const TypeAry* target_array_type = TypeAry::make(TypeInt::CHAR, TypeInt::make(0, target_length, Type::WidenMin));
1340 const TypeAryPtr* target_type = TypeAryPtr::make(TypePtr::BotPTR, target_array_type, target_array->klass(), true, Type::OffsetBot);
1341
1342 // String.value field is known to be @Stable.
1343 if (UseImplicitStableValues) {
1344 target = cast_array_to_stable(target, target_type);
1345 }
1346
1347 IdealKit kit(this, false, true);
1348 #define __ kit.
1349 Node* zero = __ ConI(0);
1350 Node* one = __ ConI(1);
1351 Node* cache = __ ConI(cache_i);
1352 Node* md2 = __ ConI(md2_i);
1353 Node* lastChar = __ ConI(target_array->char_at(target_length - 1));
1354 Node* targetCount = __ ConI(target_length);
1355 Node* targetCountLess1 = __ ConI(target_length - 1);
1356 Node* targetOffset = __ ConI(targetOffset_i);
1357 Node* sourceEnd = __ SubI(__ AddI(sourceOffset, sourceCount), targetCountLess1);
1358
1359 IdealVariable rtn(kit), i(kit), j(kit); __ declarations_done();
1360 Node* outer_loop = __ make_label(2 /* goto */);
1361 Node* return_ = __ make_label(1);
1362
1363 __ set(rtn,__ ConI(-1));
1364 __ loop(this, nargs, i, sourceOffset, BoolTest::lt, sourceEnd); {
1365 Node* i2 = __ AddI(__ value(i), targetCountLess1);
1366 // pin to prohibit loading of "next iteration" value which may SEGV (rare)
1367 Node* src = load_array_element(__ ctrl(), source, i2, TypeAryPtr::CHARS);
1368 __ if_then(src, BoolTest::eq, lastChar, unlikely); {
1369 __ loop(this, nargs, j, zero, BoolTest::lt, targetCountLess1); {
1370 Node* tpj = __ AddI(targetOffset, __ value(j));
1371 Node* targ = load_array_element(no_ctrl, target, tpj, target_type);
1372 Node* ipj = __ AddI(__ value(i), __ value(j));
1373 Node* src2 = load_array_element(no_ctrl, source, ipj, TypeAryPtr::CHARS);
1374 __ if_then(targ, BoolTest::ne, src2); {
1375 __ if_then(__ AndI(cache, __ LShiftI(one, src2)), BoolTest::eq, zero); {
1376 __ if_then(md2, BoolTest::lt, __ AddI(__ value(j), one)); {
1377 __ increment(i, __ AddI(__ value(j), one));
1378 __ goto_(outer_loop);
1379 } __ end_if(); __ dead(j);
1380 }__ end_if(); __ dead(j);
1381 __ increment(i, md2);
1382 __ goto_(outer_loop);
1383 }__ end_if();
1384 __ increment(j, one);
1385 }__ end_loop(); __ dead(j);
1386 __ set(rtn, __ SubI(__ value(i), sourceOffset)); __ dead(i);
1387 __ goto_(return_);
1388 }__ end_if();
1389 __ if_then(__ AndI(cache, __ LShiftI(one, src)), BoolTest::eq, zero, likely); {
1390 __ increment(i, targetCountLess1);
1391 }__ end_if();
1392 __ increment(i, one);
1393 __ bind(outer_loop);
1394 }__ end_loop(); __ dead(i);
1395 __ bind(return_);
1396
1397 // Final sync IdealKit and GraphKit.
1398 final_sync(kit);
1399 Node* result = __ value(rtn);
1400 #undef __
1401 C->set_has_loops(true);
1402 return result;
1403 }
1404
1405 //------------------------------inline_string_indexOf------------------------
1406 bool LibraryCallKit::inline_string_indexOf() {
1407 Node* receiver = argument(0);
1408 Node* arg = argument(1);
1409
1410 Node* result;
1411 // Disable the use of pcmpestri until it can be guaranteed that
1412 // the load doesn't cross into the uncommited space.
1413 if (Matcher::has_match_rule(Op_StrIndexOf) &&
1414 UseSSE42Intrinsics) {
1415 // Generate SSE4.2 version of indexOf
1416 // We currently only have match rules that use SSE4.2
1417
1418 receiver = null_check(receiver);
1419 arg = null_check(arg);
1420 if (stopped()) {
1421 return true;
1422 }
1423
1424 ciInstanceKlass* str_klass = env()->String_klass();
1425 const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(str_klass);
1426
1427 // Make the merge point
1428 RegionNode* result_rgn = new RegionNode(4);
1429 Node* result_phi = new PhiNode(result_rgn, TypeInt::INT);
1430 Node* no_ctrl = NULL;
1431
1432 // Get start addr of source string
1433 Node* source = load_String_value(no_ctrl, receiver);
1434 Node* source_offset = load_String_offset(no_ctrl, receiver);
1435 Node* source_start = array_element_address(source, source_offset, T_CHAR);
1436
1437 // Get length of source string
1438 Node* source_cnt = load_String_length(no_ctrl, receiver);
1439
1440 // Get start addr of substring
1441 Node* substr = load_String_value(no_ctrl, arg);
1442 Node* substr_offset = load_String_offset(no_ctrl, arg);
1443 Node* substr_start = array_element_address(substr, substr_offset, T_CHAR);
1444
1445 // Get length of source string
1446 Node* substr_cnt = load_String_length(no_ctrl, arg);
1447
1448 // Check for substr count > string count
1449 Node* cmp = _gvn.transform(new CmpINode(substr_cnt, source_cnt));
1450 Node* bol = _gvn.transform(new BoolNode(cmp, BoolTest::gt));
1451 Node* if_gt = generate_slow_guard(bol, NULL);
1452 if (if_gt != NULL) {
1453 result_phi->init_req(2, intcon(-1));
1454 result_rgn->init_req(2, if_gt);
1455 }
1456
1457 if (!stopped()) {
1458 // Check for substr count == 0
1459 cmp = _gvn.transform(new CmpINode(substr_cnt, intcon(0)));
1460 bol = _gvn.transform(new BoolNode(cmp, BoolTest::eq));
1461 Node* if_zero = generate_slow_guard(bol, NULL);
1462 if (if_zero != NULL) {
1463 result_phi->init_req(3, intcon(0));
1464 result_rgn->init_req(3, if_zero);
1465 }
1466 }
1467
1468 if (!stopped()) {
1469 result = make_string_method_node(Op_StrIndexOf, source_start, source_cnt, substr_start, substr_cnt);
1470 result_phi->init_req(1, result);
1471 result_rgn->init_req(1, control());
1472 }
1473 set_control(_gvn.transform(result_rgn));
1474 record_for_igvn(result_rgn);
1475 result = _gvn.transform(result_phi);
1476
1477 } else { // Use LibraryCallKit::string_indexOf
1478 // don't intrinsify if argument isn't a constant string.
1479 if (!arg->is_Con()) {
1480 return false;
1481 }
1482 const TypeOopPtr* str_type = _gvn.type(arg)->isa_oopptr();
1483 if (str_type == NULL) {
1484 return false;
1485 }
1486 ciInstanceKlass* klass = env()->String_klass();
1487 ciObject* str_const = str_type->const_oop();
1488 if (str_const == NULL || str_const->klass() != klass) {
1489 return false;
1490 }
1491 ciInstance* str = str_const->as_instance();
1492 assert(str != NULL, "must be instance");
1493
1494 ciObject* v = str->field_value_by_offset(java_lang_String::value_offset_in_bytes()).as_object();
1495 ciTypeArray* pat = v->as_type_array(); // pattern (argument) character array
1496
1497 int o;
1498 int c;
1499 if (java_lang_String::has_offset_field()) {
1500 o = str->field_value_by_offset(java_lang_String::offset_offset_in_bytes()).as_int();
1501 c = str->field_value_by_offset(java_lang_String::count_offset_in_bytes()).as_int();
1502 } else {
1503 o = 0;
1504 c = pat->length();
1505 }
1506
1507 // constant strings have no offset and count == length which
1508 // simplifies the resulting code somewhat so lets optimize for that.
1509 if (o != 0 || c != pat->length()) {
1510 return false;
1511 }
1512
1513 receiver = null_check(receiver, T_OBJECT);
1514 // NOTE: No null check on the argument is needed since it's a constant String oop.
1515 if (stopped()) {
1516 return true;
1517 }
1518
1519 // The null string as a pattern always returns 0 (match at beginning of string)
1520 if (c == 0) {
1521 set_result(intcon(0));
1522 return true;
1523 }
1524
1525 // Generate default indexOf
1526 jchar lastChar = pat->char_at(o + (c - 1));
1527 int cache = 0;
1528 int i;
1529 for (i = 0; i < c - 1; i++) {
1530 assert(i < pat->length(), "out of range");
1531 cache |= (1 << (pat->char_at(o + i) & (sizeof(cache) * BitsPerByte - 1)));
1532 }
1533
1534 int md2 = c;
1535 for (i = 0; i < c - 1; i++) {
1536 assert(i < pat->length(), "out of range");
1537 if (pat->char_at(o + i) == lastChar) {
1538 md2 = (c - 1) - i;
1539 }
1540 }
1541
1542 result = string_indexOf(receiver, pat, o, cache, md2);
1543 }
1544 set_result(result);
1545 return true;
1546 }
1547
1548 //--------------------------round_double_node--------------------------------
1549 // Round a double node if necessary.
1550 Node* LibraryCallKit::round_double_node(Node* n) {
1551 if (Matcher::strict_fp_requires_explicit_rounding && UseSSE <= 1)
1552 n = _gvn.transform(new RoundDoubleNode(0, n));
1553 return n;
1554 }
1555
1556 //------------------------------inline_math-----------------------------------
1557 // public static double Math.abs(double)
1558 // public static double Math.sqrt(double)
1559 // public static double Math.log(double)
1560 // public static double Math.log10(double)
1561 bool LibraryCallKit::inline_math(vmIntrinsics::ID id) {
1562 Node* arg = round_double_node(argument(0));
1563 Node* n;
1564 switch (id) {
1565 case vmIntrinsics::_dabs: n = new AbsDNode( arg); break;
1566 case vmIntrinsics::_dsqrt: n = new SqrtDNode(C, control(), arg); break;
1567 case vmIntrinsics::_dlog: n = new LogDNode(C, control(), arg); break;
1568 case vmIntrinsics::_dlog10: n = new Log10DNode(C, control(), arg); break;
1569 default: fatal_unexpected_iid(id); break;
1570 }
1571 set_result(_gvn.transform(n));
1572 return true;
1573 }
1574
1575 //------------------------------inline_trig----------------------------------
1576 // Inline sin/cos/tan instructions, if possible. If rounding is required, do
1577 // argument reduction which will turn into a fast/slow diamond.
1578 bool LibraryCallKit::inline_trig(vmIntrinsics::ID id) {
1579 Node* arg = round_double_node(argument(0));
1580 Node* n = NULL;
1581
1582 switch (id) {
1583 case vmIntrinsics::_dsin: n = new SinDNode(C, control(), arg); break;
1584 case vmIntrinsics::_dcos: n = new CosDNode(C, control(), arg); break;
1585 case vmIntrinsics::_dtan: n = new TanDNode(C, control(), arg); break;
1586 default: fatal_unexpected_iid(id); break;
1587 }
1588 n = _gvn.transform(n);
1589
1590 // Rounding required? Check for argument reduction!
1591 if (Matcher::strict_fp_requires_explicit_rounding) {
1592 static const double pi_4 = 0.7853981633974483;
1593 static const double neg_pi_4 = -0.7853981633974483;
1594 // pi/2 in 80-bit extended precision
1595 // static const unsigned char pi_2_bits_x[] = {0x35,0xc2,0x68,0x21,0xa2,0xda,0x0f,0xc9,0xff,0x3f,0x00,0x00,0x00,0x00,0x00,0x00};
1596 // -pi/2 in 80-bit extended precision
1597 // 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};
1598 // Cutoff value for using this argument reduction technique
1599 //static const double pi_2_minus_epsilon = 1.564660403643354;
1600 //static const double neg_pi_2_plus_epsilon = -1.564660403643354;
1601
1602 // Pseudocode for sin:
1603 // if (x <= Math.PI / 4.0) {
1604 // if (x >= -Math.PI / 4.0) return fsin(x);
1605 // if (x >= -Math.PI / 2.0) return -fcos(x + Math.PI / 2.0);
1606 // } else {
1607 // if (x <= Math.PI / 2.0) return fcos(x - Math.PI / 2.0);
1608 // }
1609 // return StrictMath.sin(x);
1610
1611 // Pseudocode for cos:
1612 // if (x <= Math.PI / 4.0) {
1613 // if (x >= -Math.PI / 4.0) return fcos(x);
1614 // if (x >= -Math.PI / 2.0) return fsin(x + Math.PI / 2.0);
1615 // } else {
1616 // if (x <= Math.PI / 2.0) return -fsin(x - Math.PI / 2.0);
1617 // }
1618 // return StrictMath.cos(x);
1619
1620 // Actually, sticking in an 80-bit Intel value into C2 will be tough; it
1621 // requires a special machine instruction to load it. Instead we'll try
1622 // the 'easy' case. If we really need the extra range +/- PI/2 we'll
1623 // probably do the math inside the SIN encoding.
1624
1625 // Make the merge point
1626 RegionNode* r = new RegionNode(3);
1627 Node* phi = new PhiNode(r, Type::DOUBLE);
1628
1629 // Flatten arg so we need only 1 test
1630 Node *abs = _gvn.transform(new AbsDNode(arg));
1631 // Node for PI/4 constant
1632 Node *pi4 = makecon(TypeD::make(pi_4));
1633 // Check PI/4 : abs(arg)
1634 Node *cmp = _gvn.transform(new CmpDNode(pi4,abs));
1635 // Check: If PI/4 < abs(arg) then go slow
1636 Node *bol = _gvn.transform(new BoolNode( cmp, BoolTest::lt ));
1637 // Branch either way
1638 IfNode *iff = create_and_xform_if(control(),bol, PROB_STATIC_FREQUENT, COUNT_UNKNOWN);
1639 set_control(opt_iff(r,iff));
1640
1641 // Set fast path result
1642 phi->init_req(2, n);
1643
1644 // Slow path - non-blocking leaf call
1645 Node* call = NULL;
1646 switch (id) {
1647 case vmIntrinsics::_dsin:
1648 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(),
1649 CAST_FROM_FN_PTR(address, SharedRuntime::dsin),
1650 "Sin", NULL, arg, top());
1651 break;
1652 case vmIntrinsics::_dcos:
1653 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(),
1654 CAST_FROM_FN_PTR(address, SharedRuntime::dcos),
1655 "Cos", NULL, arg, top());
1656 break;
1657 case vmIntrinsics::_dtan:
1658 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(),
1659 CAST_FROM_FN_PTR(address, SharedRuntime::dtan),
1660 "Tan", NULL, arg, top());
1661 break;
1662 }
1663 assert(control()->in(0) == call, "");
1664 Node* slow_result = _gvn.transform(new ProjNode(call, TypeFunc::Parms));
1665 r->init_req(1, control());
1666 phi->init_req(1, slow_result);
1667
1668 // Post-merge
1669 set_control(_gvn.transform(r));
1670 record_for_igvn(r);
1671 n = _gvn.transform(phi);
1672
1673 C->set_has_split_ifs(true); // Has chance for split-if optimization
1674 }
1675 set_result(n);
1676 return true;
1677 }
1678
1679 Node* LibraryCallKit::finish_pow_exp(Node* result, Node* x, Node* y, const TypeFunc* call_type, address funcAddr, const char* funcName) {
1680 //-------------------
1681 //result=(result.isNaN())? funcAddr():result;
1682 // Check: If isNaN() by checking result!=result? then either trap
1683 // or go to runtime
1684 Node* cmpisnan = _gvn.transform(new CmpDNode(result, result));
1685 // Build the boolean node
1686 Node* bolisnum = _gvn.transform(new BoolNode(cmpisnan, BoolTest::eq));
1687
1688 if (!too_many_traps(Deoptimization::Reason_intrinsic)) {
1689 { BuildCutout unless(this, bolisnum, PROB_STATIC_FREQUENT);
1690 // The pow or exp intrinsic returned a NaN, which requires a call
1691 // to the runtime. Recompile with the runtime call.
1692 uncommon_trap(Deoptimization::Reason_intrinsic,
1693 Deoptimization::Action_make_not_entrant);
1694 }
1695 return result;
1696 } else {
1697 // If this inlining ever returned NaN in the past, we compile a call
1698 // to the runtime to properly handle corner cases
1699
1700 IfNode* iff = create_and_xform_if(control(), bolisnum, PROB_STATIC_FREQUENT, COUNT_UNKNOWN);
1701 Node* if_slow = _gvn.transform(new IfFalseNode(iff));
1702 Node* if_fast = _gvn.transform(new IfTrueNode(iff));
1703
1704 if (!if_slow->is_top()) {
1705 RegionNode* result_region = new RegionNode(3);
1706 PhiNode* result_val = new PhiNode(result_region, Type::DOUBLE);
1707
1708 result_region->init_req(1, if_fast);
1709 result_val->init_req(1, result);
1710
1711 set_control(if_slow);
1712
1713 const TypePtr* no_memory_effects = NULL;
1714 Node* rt = make_runtime_call(RC_LEAF, call_type, funcAddr, funcName,
1715 no_memory_effects,
1716 x, top(), y, y ? top() : NULL);
1717 Node* value = _gvn.transform(new ProjNode(rt, TypeFunc::Parms+0));
1718 #ifdef ASSERT
1719 Node* value_top = _gvn.transform(new ProjNode(rt, TypeFunc::Parms+1));
1720 assert(value_top == top(), "second value must be top");
1721 #endif
1722
1723 result_region->init_req(2, control());
1724 result_val->init_req(2, value);
1725 set_control(_gvn.transform(result_region));
1726 return _gvn.transform(result_val);
1727 } else {
1728 return result;
1729 }
1730 }
1731 }
1732
1733 //------------------------------inline_exp-------------------------------------
1734 // Inline exp instructions, if possible. The Intel hardware only misses
1735 // really odd corner cases (+/- Infinity). Just uncommon-trap them.
1736 bool LibraryCallKit::inline_exp() {
1737 Node* arg = round_double_node(argument(0));
1738 Node* n = _gvn.transform(new ExpDNode(C, control(), arg));
1739
1740 n = finish_pow_exp(n, arg, NULL, OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dexp), "EXP");
1741 set_result(n);
1742
1743 C->set_has_split_ifs(true); // Has chance for split-if optimization
1744 return true;
1745 }
1746
1747 //------------------------------inline_pow-------------------------------------
1748 // Inline power instructions, if possible.
1749 bool LibraryCallKit::inline_pow() {
1750 // Pseudocode for pow
1751 // if (y == 2) {
1752 // return x * x;
1753 // } else {
1754 // if (x <= 0.0) {
1755 // long longy = (long)y;
1756 // if ((double)longy == y) { // if y is long
1757 // if (y + 1 == y) longy = 0; // huge number: even
1758 // result = ((1&longy) == 0)?-DPow(abs(x), y):DPow(abs(x), y);
1759 // } else {
1760 // result = NaN;
1761 // }
1762 // } else {
1763 // result = DPow(x,y);
1764 // }
1765 // if (result != result)? {
1766 // result = uncommon_trap() or runtime_call();
1767 // }
1768 // return result;
1769 // }
1770
1771 Node* x = round_double_node(argument(0));
1772 Node* y = round_double_node(argument(2));
1773
1774 Node* result = NULL;
1775
1776 Node* const_two_node = makecon(TypeD::make(2.0));
1777 Node* cmp_node = _gvn.transform(new CmpDNode(y, const_two_node));
1778 Node* bool_node = _gvn.transform(new BoolNode(cmp_node, BoolTest::eq));
1779 IfNode* if_node = create_and_xform_if(control(), bool_node, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN);
1780 Node* if_true = _gvn.transform(new IfTrueNode(if_node));
1781 Node* if_false = _gvn.transform(new IfFalseNode(if_node));
1782
1783 RegionNode* region_node = new RegionNode(3);
1784 region_node->init_req(1, if_true);
1785
1786 Node* phi_node = new PhiNode(region_node, Type::DOUBLE);
1787 // special case for x^y where y == 2, we can convert it to x * x
1788 phi_node->init_req(1, _gvn.transform(new MulDNode(x, x)));
1789
1790 // set control to if_false since we will now process the false branch
1791 set_control(if_false);
1792
1793 if (!too_many_traps(Deoptimization::Reason_intrinsic)) {
1794 // Short form: skip the fancy tests and just check for NaN result.
1795 result = _gvn.transform(new PowDNode(C, control(), x, y));
1796 } else {
1797 // If this inlining ever returned NaN in the past, include all
1798 // checks + call to the runtime.
1799
1800 // Set the merge point for If node with condition of (x <= 0.0)
1801 // There are four possible paths to region node and phi node
1802 RegionNode *r = new RegionNode(4);
1803 Node *phi = new PhiNode(r, Type::DOUBLE);
1804
1805 // Build the first if node: if (x <= 0.0)
1806 // Node for 0 constant
1807 Node *zeronode = makecon(TypeD::ZERO);
1808 // Check x:0
1809 Node *cmp = _gvn.transform(new CmpDNode(x, zeronode));
1810 // Check: If (x<=0) then go complex path
1811 Node *bol1 = _gvn.transform(new BoolNode( cmp, BoolTest::le ));
1812 // Branch either way
1813 IfNode *if1 = create_and_xform_if(control(),bol1, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN);
1814 // Fast path taken; set region slot 3
1815 Node *fast_taken = _gvn.transform(new IfFalseNode(if1));
1816 r->init_req(3,fast_taken); // Capture fast-control
1817
1818 // Fast path not-taken, i.e. slow path
1819 Node *complex_path = _gvn.transform(new IfTrueNode(if1));
1820
1821 // Set fast path result
1822 Node *fast_result = _gvn.transform(new PowDNode(C, control(), x, y));
1823 phi->init_req(3, fast_result);
1824
1825 // Complex path
1826 // Build the second if node (if y is long)
1827 // Node for (long)y
1828 Node *longy = _gvn.transform(new ConvD2LNode(y));
1829 // Node for (double)((long) y)
1830 Node *doublelongy= _gvn.transform(new ConvL2DNode(longy));
1831 // Check (double)((long) y) : y
1832 Node *cmplongy= _gvn.transform(new CmpDNode(doublelongy, y));
1833 // Check if (y isn't long) then go to slow path
1834
1835 Node *bol2 = _gvn.transform(new BoolNode( cmplongy, BoolTest::ne ));
1836 // Branch either way
1837 IfNode *if2 = create_and_xform_if(complex_path,bol2, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN);
1838 Node* ylong_path = _gvn.transform(new IfFalseNode(if2));
1839
1840 Node *slow_path = _gvn.transform(new IfTrueNode(if2));
1841
1842 // Calculate DPow(abs(x), y)*(1 & (long)y)
1843 // Node for constant 1
1844 Node *conone = longcon(1);
1845 // 1& (long)y
1846 Node *signnode= _gvn.transform(new AndLNode(conone, longy));
1847
1848 // A huge number is always even. Detect a huge number by checking
1849 // if y + 1 == y and set integer to be tested for parity to 0.
1850 // Required for corner case:
1851 // (long)9.223372036854776E18 = max_jlong
1852 // (double)(long)9.223372036854776E18 = 9.223372036854776E18
1853 // max_jlong is odd but 9.223372036854776E18 is even
1854 Node* yplus1 = _gvn.transform(new AddDNode(y, makecon(TypeD::make(1))));
1855 Node *cmpyplus1= _gvn.transform(new CmpDNode(yplus1, y));
1856 Node *bolyplus1 = _gvn.transform(new BoolNode( cmpyplus1, BoolTest::eq ));
1857 Node* correctedsign = NULL;
1858 if (ConditionalMoveLimit != 0) {
1859 correctedsign = _gvn.transform(CMoveNode::make(NULL, bolyplus1, signnode, longcon(0), TypeLong::LONG));
1860 } else {
1861 IfNode *ifyplus1 = create_and_xform_if(ylong_path,bolyplus1, PROB_FAIR, COUNT_UNKNOWN);
1862 RegionNode *r = new RegionNode(3);
1863 Node *phi = new PhiNode(r, TypeLong::LONG);
1864 r->init_req(1, _gvn.transform(new IfFalseNode(ifyplus1)));
1865 r->init_req(2, _gvn.transform(new IfTrueNode(ifyplus1)));
1866 phi->init_req(1, signnode);
1867 phi->init_req(2, longcon(0));
1868 correctedsign = _gvn.transform(phi);
1869 ylong_path = _gvn.transform(r);
1870 record_for_igvn(r);
1871 }
1872
1873 // zero node
1874 Node *conzero = longcon(0);
1875 // Check (1&(long)y)==0?
1876 Node *cmpeq1 = _gvn.transform(new CmpLNode(correctedsign, conzero));
1877 // Check if (1&(long)y)!=0?, if so the result is negative
1878 Node *bol3 = _gvn.transform(new BoolNode( cmpeq1, BoolTest::ne ));
1879 // abs(x)
1880 Node *absx=_gvn.transform(new AbsDNode(x));
1881 // abs(x)^y
1882 Node *absxpowy = _gvn.transform(new PowDNode(C, control(), absx, y));
1883 // -abs(x)^y
1884 Node *negabsxpowy = _gvn.transform(new NegDNode (absxpowy));
1885 // (1&(long)y)==1?-DPow(abs(x), y):DPow(abs(x), y)
1886 Node *signresult = NULL;
1887 if (ConditionalMoveLimit != 0) {
1888 signresult = _gvn.transform(CMoveNode::make(NULL, bol3, absxpowy, negabsxpowy, Type::DOUBLE));
1889 } else {
1890 IfNode *ifyeven = create_and_xform_if(ylong_path,bol3, PROB_FAIR, COUNT_UNKNOWN);
1891 RegionNode *r = new RegionNode(3);
1892 Node *phi = new PhiNode(r, Type::DOUBLE);
1893 r->init_req(1, _gvn.transform(new IfFalseNode(ifyeven)));
1894 r->init_req(2, _gvn.transform(new IfTrueNode(ifyeven)));
1895 phi->init_req(1, absxpowy);
1896 phi->init_req(2, negabsxpowy);
1897 signresult = _gvn.transform(phi);
1898 ylong_path = _gvn.transform(r);
1899 record_for_igvn(r);
1900 }
1901 // Set complex path fast result
1902 r->init_req(2, ylong_path);
1903 phi->init_req(2, signresult);
1904
1905 static const jlong nan_bits = CONST64(0x7ff8000000000000);
1906 Node *slow_result = makecon(TypeD::make(*(double*)&nan_bits)); // return NaN
1907 r->init_req(1,slow_path);
1908 phi->init_req(1,slow_result);
1909
1910 // Post merge
1911 set_control(_gvn.transform(r));
1912 record_for_igvn(r);
1913 result = _gvn.transform(phi);
1914 }
1915
1916 result = finish_pow_exp(result, x, y, OptoRuntime::Math_DD_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dpow), "POW");
1917
1918 // control from finish_pow_exp is now input to the region node
1919 region_node->set_req(2, control());
1920 // the result from finish_pow_exp is now input to the phi node
1921 phi_node->init_req(2, result);
1922 set_control(_gvn.transform(region_node));
1923 record_for_igvn(region_node);
1924 set_result(_gvn.transform(phi_node));
1925
1926 C->set_has_split_ifs(true); // Has chance for split-if optimization
1927 return true;
1928 }
1929
1930 //------------------------------runtime_math-----------------------------
1931 bool LibraryCallKit::runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName) {
1932 assert(call_type == OptoRuntime::Math_DD_D_Type() || call_type == OptoRuntime::Math_D_D_Type(),
1933 "must be (DD)D or (D)D type");
1934
1935 // Inputs
1936 Node* a = round_double_node(argument(0));
1937 Node* b = (call_type == OptoRuntime::Math_DD_D_Type()) ? round_double_node(argument(2)) : NULL;
1938
1939 const TypePtr* no_memory_effects = NULL;
1940 Node* trig = make_runtime_call(RC_LEAF, call_type, funcAddr, funcName,
1941 no_memory_effects,
1942 a, top(), b, b ? top() : NULL);
1943 Node* value = _gvn.transform(new ProjNode(trig, TypeFunc::Parms+0));
1944 #ifdef ASSERT
1945 Node* value_top = _gvn.transform(new ProjNode(trig, TypeFunc::Parms+1));
1946 assert(value_top == top(), "second value must be top");
1947 #endif
1948
1949 set_result(value);
1950 return true;
1951 }
1952
1953 //------------------------------inline_math_native-----------------------------
1954 bool LibraryCallKit::inline_math_native(vmIntrinsics::ID id) {
1955 #define FN_PTR(f) CAST_FROM_FN_PTR(address, f)
1956 switch (id) {
1957 // These intrinsics are not properly supported on all hardware
1958 case vmIntrinsics::_dcos: return Matcher::has_match_rule(Op_CosD) ? inline_trig(id) :
1959 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dcos), "COS");
1960 case vmIntrinsics::_dsin: return Matcher::has_match_rule(Op_SinD) ? inline_trig(id) :
1961 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dsin), "SIN");
1962 case vmIntrinsics::_dtan: return Matcher::has_match_rule(Op_TanD) ? inline_trig(id) :
1963 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dtan), "TAN");
1964
1965 case vmIntrinsics::_dlog: return Matcher::has_match_rule(Op_LogD) ? inline_math(id) :
1966 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dlog), "LOG");
1967 case vmIntrinsics::_dlog10: return Matcher::has_match_rule(Op_Log10D) ? inline_math(id) :
1968 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dlog10), "LOG10");
1969
1970 // These intrinsics are supported on all hardware
1971 case vmIntrinsics::_dsqrt: return Matcher::match_rule_supported(Op_SqrtD) ? inline_math(id) : false;
1972 case vmIntrinsics::_dabs: return Matcher::has_match_rule(Op_AbsD) ? inline_math(id) : false;
1973
1974 case vmIntrinsics::_dexp: return Matcher::has_match_rule(Op_ExpD) ? inline_exp() :
1975 runtime_math(OptoRuntime::Math_D_D_Type(), FN_PTR(SharedRuntime::dexp), "EXP");
1976 case vmIntrinsics::_dpow: return Matcher::has_match_rule(Op_PowD) ? inline_pow() :
1977 runtime_math(OptoRuntime::Math_DD_D_Type(), FN_PTR(SharedRuntime::dpow), "POW");
1978 #undef FN_PTR
1979
1980 // These intrinsics are not yet correctly implemented
1981 case vmIntrinsics::_datan2:
1982 return false;
1983
1984 default:
1985 fatal_unexpected_iid(id);
1986 return false;
1987 }
1988 }
1989
1990 static bool is_simple_name(Node* n) {
1991 return (n->req() == 1 // constant
1992 || (n->is_Type() && n->as_Type()->type()->singleton())
1993 || n->is_Proj() // parameter or return value
1994 || n->is_Phi() // local of some sort
1995 );
1996 }
1997
1998 //----------------------------inline_min_max-----------------------------------
1999 bool LibraryCallKit::inline_min_max(vmIntrinsics::ID id) {
2000 set_result(generate_min_max(id, argument(0), argument(1)));
2001 return true;
2002 }
2003
2004 void LibraryCallKit::inline_math_mathExact(Node* math, Node *test) {
2005 Node* bol = _gvn.transform( new BoolNode(test, BoolTest::overflow) );
2006 IfNode* check = create_and_map_if(control(), bol, PROB_UNLIKELY_MAG(3), COUNT_UNKNOWN);
2007 Node* fast_path = _gvn.transform( new IfFalseNode(check));
2008 Node* slow_path = _gvn.transform( new IfTrueNode(check) );
2009
2010 {
2011 PreserveJVMState pjvms(this);
2012 PreserveReexecuteState preexecs(this);
2013 jvms()->set_should_reexecute(true);
2014
2015 set_control(slow_path);
2016 set_i_o(i_o());
2017
2018 uncommon_trap(Deoptimization::Reason_intrinsic,
2019 Deoptimization::Action_none);
2020 }
2021
2022 set_control(fast_path);
2023 set_result(math);
2024 }
2025
2026 template <typename OverflowOp>
2027 bool LibraryCallKit::inline_math_overflow(Node* arg1, Node* arg2) {
2028 typedef typename OverflowOp::MathOp MathOp;
2029
2030 MathOp* mathOp = new MathOp(arg1, arg2);
2031 Node* operation = _gvn.transform( mathOp );
2032 Node* ofcheck = _gvn.transform( new OverflowOp(arg1, arg2) );
2033 inline_math_mathExact(operation, ofcheck);
2034 return true;
2035 }
2036
2037 bool LibraryCallKit::inline_math_addExactI(bool is_increment) {
2038 return inline_math_overflow<OverflowAddINode>(argument(0), is_increment ? intcon(1) : argument(1));
2039 }
2040
2041 bool LibraryCallKit::inline_math_addExactL(bool is_increment) {
2042 return inline_math_overflow<OverflowAddLNode>(argument(0), is_increment ? longcon(1) : argument(2));
2043 }
2044
2045 bool LibraryCallKit::inline_math_subtractExactI(bool is_decrement) {
2046 return inline_math_overflow<OverflowSubINode>(argument(0), is_decrement ? intcon(1) : argument(1));
2047 }
2048
2049 bool LibraryCallKit::inline_math_subtractExactL(bool is_decrement) {
2050 return inline_math_overflow<OverflowSubLNode>(argument(0), is_decrement ? longcon(1) : argument(2));
2051 }
2052
2053 bool LibraryCallKit::inline_math_negateExactI() {
2054 return inline_math_overflow<OverflowSubINode>(intcon(0), argument(0));
2055 }
2056
2057 bool LibraryCallKit::inline_math_negateExactL() {
2058 return inline_math_overflow<OverflowSubLNode>(longcon(0), argument(0));
2059 }
2060
2061 bool LibraryCallKit::inline_math_multiplyExactI() {
2062 return inline_math_overflow<OverflowMulINode>(argument(0), argument(1));
2063 }
2064
2065 bool LibraryCallKit::inline_math_multiplyExactL() {
2066 return inline_math_overflow<OverflowMulLNode>(argument(0), argument(2));
2067 }
2068
2069 Node*
2070 LibraryCallKit::generate_min_max(vmIntrinsics::ID id, Node* x0, Node* y0) {
2071 // These are the candidate return value:
2072 Node* xvalue = x0;
2073 Node* yvalue = y0;
2074
2075 if (xvalue == yvalue) {
2076 return xvalue;
2077 }
2078
2079 bool want_max = (id == vmIntrinsics::_max);
2080
2081 const TypeInt* txvalue = _gvn.type(xvalue)->isa_int();
2082 const TypeInt* tyvalue = _gvn.type(yvalue)->isa_int();
2083 if (txvalue == NULL || tyvalue == NULL) return top();
2084 // This is not really necessary, but it is consistent with a
2085 // hypothetical MaxINode::Value method:
2086 int widen = MAX2(txvalue->_widen, tyvalue->_widen);
2087
2088 // %%% This folding logic should (ideally) be in a different place.
2089 // Some should be inside IfNode, and there to be a more reliable
2090 // transformation of ?: style patterns into cmoves. We also want
2091 // more powerful optimizations around cmove and min/max.
2092
2093 // Try to find a dominating comparison of these guys.
2094 // It can simplify the index computation for Arrays.copyOf
2095 // and similar uses of System.arraycopy.
2096 // First, compute the normalized version of CmpI(x, y).
2097 int cmp_op = Op_CmpI;
2098 Node* xkey = xvalue;
2099 Node* ykey = yvalue;
2100 Node* ideal_cmpxy = _gvn.transform(new CmpINode(xkey, ykey));
2101 if (ideal_cmpxy->is_Cmp()) {
2102 // E.g., if we have CmpI(length - offset, count),
2103 // it might idealize to CmpI(length, count + offset)
2104 cmp_op = ideal_cmpxy->Opcode();
2105 xkey = ideal_cmpxy->in(1);
2106 ykey = ideal_cmpxy->in(2);
2107 }
2108
2109 // Start by locating any relevant comparisons.
2110 Node* start_from = (xkey->outcnt() < ykey->outcnt()) ? xkey : ykey;
2111 Node* cmpxy = NULL;
2112 Node* cmpyx = NULL;
2113 for (DUIterator_Fast kmax, k = start_from->fast_outs(kmax); k < kmax; k++) {
2114 Node* cmp = start_from->fast_out(k);
2115 if (cmp->outcnt() > 0 && // must have prior uses
2116 cmp->in(0) == NULL && // must be context-independent
2117 cmp->Opcode() == cmp_op) { // right kind of compare
2118 if (cmp->in(1) == xkey && cmp->in(2) == ykey) cmpxy = cmp;
2119 if (cmp->in(1) == ykey && cmp->in(2) == xkey) cmpyx = cmp;
2120 }
2121 }
2122
2123 const int NCMPS = 2;
2124 Node* cmps[NCMPS] = { cmpxy, cmpyx };
2125 int cmpn;
2126 for (cmpn = 0; cmpn < NCMPS; cmpn++) {
2127 if (cmps[cmpn] != NULL) break; // find a result
2128 }
2129 if (cmpn < NCMPS) {
2130 // Look for a dominating test that tells us the min and max.
2131 int depth = 0; // Limit search depth for speed
2132 Node* dom = control();
2133 for (; dom != NULL; dom = IfNode::up_one_dom(dom, true)) {
2134 if (++depth >= 100) break;
2135 Node* ifproj = dom;
2136 if (!ifproj->is_Proj()) continue;
2137 Node* iff = ifproj->in(0);
2138 if (!iff->is_If()) continue;
2139 Node* bol = iff->in(1);
2140 if (!bol->is_Bool()) continue;
2141 Node* cmp = bol->in(1);
2142 if (cmp == NULL) continue;
2143 for (cmpn = 0; cmpn < NCMPS; cmpn++)
2144 if (cmps[cmpn] == cmp) break;
2145 if (cmpn == NCMPS) continue;
2146 BoolTest::mask btest = bol->as_Bool()->_test._test;
2147 if (ifproj->is_IfFalse()) btest = BoolTest(btest).negate();
2148 if (cmp->in(1) == ykey) btest = BoolTest(btest).commute();
2149 // At this point, we know that 'x btest y' is true.
2150 switch (btest) {
2151 case BoolTest::eq:
2152 // They are proven equal, so we can collapse the min/max.
2153 // Either value is the answer. Choose the simpler.
2154 if (is_simple_name(yvalue) && !is_simple_name(xvalue))
2155 return yvalue;
2156 return xvalue;
2157 case BoolTest::lt: // x < y
2158 case BoolTest::le: // x <= y
2159 return (want_max ? yvalue : xvalue);
2160 case BoolTest::gt: // x > y
2161 case BoolTest::ge: // x >= y
2162 return (want_max ? xvalue : yvalue);
2163 }
2164 }
2165 }
2166
2167 // We failed to find a dominating test.
2168 // Let's pick a test that might GVN with prior tests.
2169 Node* best_bol = NULL;
2170 BoolTest::mask best_btest = BoolTest::illegal;
2171 for (cmpn = 0; cmpn < NCMPS; cmpn++) {
2172 Node* cmp = cmps[cmpn];
2173 if (cmp == NULL) continue;
2174 for (DUIterator_Fast jmax, j = cmp->fast_outs(jmax); j < jmax; j++) {
2175 Node* bol = cmp->fast_out(j);
2176 if (!bol->is_Bool()) continue;
2177 BoolTest::mask btest = bol->as_Bool()->_test._test;
2178 if (btest == BoolTest::eq || btest == BoolTest::ne) continue;
2179 if (cmp->in(1) == ykey) btest = BoolTest(btest).commute();
2180 if (bol->outcnt() > (best_bol == NULL ? 0 : best_bol->outcnt())) {
2181 best_bol = bol->as_Bool();
2182 best_btest = btest;
2183 }
2184 }
2185 }
2186
2187 Node* answer_if_true = NULL;
2188 Node* answer_if_false = NULL;
2189 switch (best_btest) {
2190 default:
2191 if (cmpxy == NULL)
2192 cmpxy = ideal_cmpxy;
2193 best_bol = _gvn.transform(new BoolNode(cmpxy, BoolTest::lt));
2194 // and fall through:
2195 case BoolTest::lt: // x < y
2196 case BoolTest::le: // x <= y
2197 answer_if_true = (want_max ? yvalue : xvalue);
2198 answer_if_false = (want_max ? xvalue : yvalue);
2199 break;
2200 case BoolTest::gt: // x > y
2201 case BoolTest::ge: // x >= y
2202 answer_if_true = (want_max ? xvalue : yvalue);
2203 answer_if_false = (want_max ? yvalue : xvalue);
2204 break;
2205 }
2206
2207 jint hi, lo;
2208 if (want_max) {
2209 // We can sharpen the minimum.
2210 hi = MAX2(txvalue->_hi, tyvalue->_hi);
2211 lo = MAX2(txvalue->_lo, tyvalue->_lo);
2212 } else {
2213 // We can sharpen the maximum.
2214 hi = MIN2(txvalue->_hi, tyvalue->_hi);
2215 lo = MIN2(txvalue->_lo, tyvalue->_lo);
2216 }
2217
2218 // Use a flow-free graph structure, to avoid creating excess control edges
2219 // which could hinder other optimizations.
2220 // Since Math.min/max is often used with arraycopy, we want
2221 // tightly_coupled_allocation to be able to see beyond min/max expressions.
2222 Node* cmov = CMoveNode::make(NULL, best_bol,
2223 answer_if_false, answer_if_true,
2224 TypeInt::make(lo, hi, widen));
2225
2226 return _gvn.transform(cmov);
2227
2228 /*
2229 // This is not as desirable as it may seem, since Min and Max
2230 // nodes do not have a full set of optimizations.
2231 // And they would interfere, anyway, with 'if' optimizations
2232 // and with CMoveI canonical forms.
2233 switch (id) {
2234 case vmIntrinsics::_min:
2235 result_val = _gvn.transform(new (C, 3) MinINode(x,y)); break;
2236 case vmIntrinsics::_max:
2237 result_val = _gvn.transform(new (C, 3) MaxINode(x,y)); break;
2238 default:
2239 ShouldNotReachHere();
2240 }
2241 */
2242 }
2243
2244 inline int
2245 LibraryCallKit::classify_unsafe_addr(Node* &base, Node* &offset) {
2246 const TypePtr* base_type = TypePtr::NULL_PTR;
2247 if (base != NULL) base_type = _gvn.type(base)->isa_ptr();
2248 if (base_type == NULL) {
2249 // Unknown type.
2250 return Type::AnyPtr;
2251 } else if (base_type == TypePtr::NULL_PTR) {
2252 // Since this is a NULL+long form, we have to switch to a rawptr.
2253 base = _gvn.transform(new CastX2PNode(offset));
2254 offset = MakeConX(0);
2255 return Type::RawPtr;
2256 } else if (base_type->base() == Type::RawPtr) {
2257 return Type::RawPtr;
2258 } else if (base_type->isa_oopptr()) {
2259 // Base is never null => always a heap address.
2260 if (base_type->ptr() == TypePtr::NotNull) {
2261 return Type::OopPtr;
2262 }
2263 // Offset is small => always a heap address.
2264 const TypeX* offset_type = _gvn.type(offset)->isa_intptr_t();
2265 if (offset_type != NULL &&
2266 base_type->offset() == 0 && // (should always be?)
2267 offset_type->_lo >= 0 &&
2268 !MacroAssembler::needs_explicit_null_check(offset_type->_hi)) {
2269 return Type::OopPtr;
2270 }
2271 // Otherwise, it might either be oop+off or NULL+addr.
2272 return Type::AnyPtr;
2273 } else {
2274 // No information:
2275 return Type::AnyPtr;
2276 }
2277 }
2278
2279 inline Node* LibraryCallKit::make_unsafe_address(Node* base, Node* offset) {
2280 int kind = classify_unsafe_addr(base, offset);
2281 if (kind == Type::RawPtr) {
2282 return basic_plus_adr(top(), base, offset);
2283 } else {
2284 return basic_plus_adr(base, offset);
2285 }
2286 }
2287
2288 //--------------------------inline_number_methods-----------------------------
2289 // inline int Integer.numberOfLeadingZeros(int)
2290 // inline int Long.numberOfLeadingZeros(long)
2291 //
2292 // inline int Integer.numberOfTrailingZeros(int)
2293 // inline int Long.numberOfTrailingZeros(long)
2294 //
2295 // inline int Integer.bitCount(int)
2296 // inline int Long.bitCount(long)
2297 //
2298 // inline char Character.reverseBytes(char)
2299 // inline short Short.reverseBytes(short)
2300 // inline int Integer.reverseBytes(int)
2301 // inline long Long.reverseBytes(long)
2302 bool LibraryCallKit::inline_number_methods(vmIntrinsics::ID id) {
2303 Node* arg = argument(0);
2304 Node* n;
2305 switch (id) {
2306 case vmIntrinsics::_numberOfLeadingZeros_i: n = new CountLeadingZerosINode( arg); break;
2307 case vmIntrinsics::_numberOfLeadingZeros_l: n = new CountLeadingZerosLNode( arg); break;
2308 case vmIntrinsics::_numberOfTrailingZeros_i: n = new CountTrailingZerosINode(arg); break;
2309 case vmIntrinsics::_numberOfTrailingZeros_l: n = new CountTrailingZerosLNode(arg); break;
2310 case vmIntrinsics::_bitCount_i: n = new PopCountINode( arg); break;
2311 case vmIntrinsics::_bitCount_l: n = new PopCountLNode( arg); break;
2312 case vmIntrinsics::_reverseBytes_c: n = new ReverseBytesUSNode(0, arg); break;
2313 case vmIntrinsics::_reverseBytes_s: n = new ReverseBytesSNode( 0, arg); break;
2314 case vmIntrinsics::_reverseBytes_i: n = new ReverseBytesINode( 0, arg); break;
2315 case vmIntrinsics::_reverseBytes_l: n = new ReverseBytesLNode( 0, arg); break;
2316 default: fatal_unexpected_iid(id); break;
2317 }
2318 set_result(_gvn.transform(n));
2319 return true;
2320 }
2321
2322 //----------------------------inline_unsafe_access----------------------------
2323
2324 const static BasicType T_ADDRESS_HOLDER = T_LONG;
2325
2326 // Helper that guards and inserts a pre-barrier.
2327 void LibraryCallKit::insert_pre_barrier(Node* base_oop, Node* offset,
2328 Node* pre_val, bool need_mem_bar) {
2329 // We could be accessing the referent field of a reference object. If so, when G1
2330 // is enabled, we need to log the value in the referent field in an SATB buffer.
2331 // This routine performs some compile time filters and generates suitable
2332 // runtime filters that guard the pre-barrier code.
2333 // Also add memory barrier for non volatile load from the referent field
2334 // to prevent commoning of loads across safepoint.
2335 if (!UseG1GC && !need_mem_bar)
2336 return;
2337
2338 // Some compile time checks.
2339
2340 // If offset is a constant, is it java_lang_ref_Reference::_reference_offset?
2341 const TypeX* otype = offset->find_intptr_t_type();
2342 if (otype != NULL && otype->is_con() &&
2343 otype->get_con() != java_lang_ref_Reference::referent_offset) {
2344 // Constant offset but not the reference_offset so just return
2345 return;
2346 }
2347
2348 // We only need to generate the runtime guards for instances.
2349 const TypeOopPtr* btype = base_oop->bottom_type()->isa_oopptr();
2350 if (btype != NULL) {
2351 if (btype->isa_aryptr()) {
2352 // Array type so nothing to do
2353 return;
2354 }
2355
2356 const TypeInstPtr* itype = btype->isa_instptr();
2357 if (itype != NULL) {
2358 // Can the klass of base_oop be statically determined to be
2359 // _not_ a sub-class of Reference and _not_ Object?
2360 ciKlass* klass = itype->klass();
2361 if ( klass->is_loaded() &&
2362 !klass->is_subtype_of(env()->Reference_klass()) &&
2363 !env()->Object_klass()->is_subtype_of(klass)) {
2364 return;
2365 }
2366 }
2367 }
2368
2369 // The compile time filters did not reject base_oop/offset so
2370 // we need to generate the following runtime filters
2371 //
2372 // if (offset == java_lang_ref_Reference::_reference_offset) {
2373 // if (instance_of(base, java.lang.ref.Reference)) {
2374 // pre_barrier(_, pre_val, ...);
2375 // }
2376 // }
2377
2378 float likely = PROB_LIKELY( 0.999);
2379 float unlikely = PROB_UNLIKELY(0.999);
2380
2381 IdealKit ideal(this);
2382 #define __ ideal.
2383
2384 Node* referent_off = __ ConX(java_lang_ref_Reference::referent_offset);
2385
2386 __ if_then(offset, BoolTest::eq, referent_off, unlikely); {
2387 // Update graphKit memory and control from IdealKit.
2388 sync_kit(ideal);
2389
2390 Node* ref_klass_con = makecon(TypeKlassPtr::make(env()->Reference_klass()));
2391 Node* is_instof = gen_instanceof(base_oop, ref_klass_con);
2392
2393 // Update IdealKit memory and control from graphKit.
2394 __ sync_kit(this);
2395
2396 Node* one = __ ConI(1);
2397 // is_instof == 0 if base_oop == NULL
2398 __ if_then(is_instof, BoolTest::eq, one, unlikely); {
2399
2400 // Update graphKit from IdeakKit.
2401 sync_kit(ideal);
2402
2403 // Use the pre-barrier to record the value in the referent field
2404 pre_barrier(false /* do_load */,
2405 __ ctrl(),
2406 NULL /* obj */, NULL /* adr */, max_juint /* alias_idx */, NULL /* val */, NULL /* val_type */,
2407 pre_val /* pre_val */,
2408 T_OBJECT);
2409 if (need_mem_bar) {
2410 // Add memory barrier to prevent commoning reads from this field
2411 // across safepoint since GC can change its value.
2412 insert_mem_bar(Op_MemBarCPUOrder);
2413 }
2414 // Update IdealKit from graphKit.
2415 __ sync_kit(this);
2416
2417 } __ end_if(); // _ref_type != ref_none
2418 } __ end_if(); // offset == referent_offset
2419
2420 // Final sync IdealKit and GraphKit.
2421 final_sync(ideal);
2422 #undef __
2423 }
2424
2425
2426 // Interpret Unsafe.fieldOffset cookies correctly:
2427 extern jlong Unsafe_field_offset_to_byte_offset(jlong field_offset);
2428
2429 const TypeOopPtr* LibraryCallKit::sharpen_unsafe_type(Compile::AliasType* alias_type, const TypePtr *adr_type, bool is_native_ptr) {
2430 // Attempt to infer a sharper value type from the offset and base type.
2431 ciKlass* sharpened_klass = NULL;
2432
2433 // See if it is an instance field, with an object type.
2434 if (alias_type->field() != NULL) {
2435 assert(!is_native_ptr, "native pointer op cannot use a java address");
2436 if (alias_type->field()->type()->is_klass()) {
2437 sharpened_klass = alias_type->field()->type()->as_klass();
2438 }
2439 }
2440
2441 // See if it is a narrow oop array.
2442 if (adr_type->isa_aryptr()) {
2443 if (adr_type->offset() >= objArrayOopDesc::base_offset_in_bytes()) {
2444 const TypeOopPtr *elem_type = adr_type->is_aryptr()->elem()->isa_oopptr();
2445 if (elem_type != NULL) {
2446 sharpened_klass = elem_type->klass();
2447 }
2448 }
2449 }
2450
2451 // The sharpened class might be unloaded if there is no class loader
2452 // contraint in place.
2453 if (sharpened_klass != NULL && sharpened_klass->is_loaded()) {
2454 const TypeOopPtr* tjp = TypeOopPtr::make_from_klass(sharpened_klass);
2455
2456 #ifndef PRODUCT
2457 if (C->print_intrinsics() || C->print_inlining()) {
2458 tty->print(" from base type: "); adr_type->dump();
2459 tty->print(" sharpened value: "); tjp->dump();
2460 }
2461 #endif
2462 // Sharpen the value type.
2463 return tjp;
2464 }
2465 return NULL;
2466 }
2467
2468 bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile) {
2469 if (callee()->is_static()) return false; // caller must have the capability!
2470
2471 #ifndef PRODUCT
2472 {
2473 ResourceMark rm;
2474 // Check the signatures.
2475 ciSignature* sig = callee()->signature();
2476 #ifdef ASSERT
2477 if (!is_store) {
2478 // Object getObject(Object base, int/long offset), etc.
2479 BasicType rtype = sig->return_type()->basic_type();
2480 if (rtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::getAddress_name())
2481 rtype = T_ADDRESS; // it is really a C void*
2482 assert(rtype == type, "getter must return the expected value");
2483 if (!is_native_ptr) {
2484 assert(sig->count() == 2, "oop getter has 2 arguments");
2485 assert(sig->type_at(0)->basic_type() == T_OBJECT, "getter base is object");
2486 assert(sig->type_at(1)->basic_type() == T_LONG, "getter offset is correct");
2487 } else {
2488 assert(sig->count() == 1, "native getter has 1 argument");
2489 assert(sig->type_at(0)->basic_type() == T_LONG, "getter base is long");
2490 }
2491 } else {
2492 // void putObject(Object base, int/long offset, Object x), etc.
2493 assert(sig->return_type()->basic_type() == T_VOID, "putter must not return a value");
2494 if (!is_native_ptr) {
2495 assert(sig->count() == 3, "oop putter has 3 arguments");
2496 assert(sig->type_at(0)->basic_type() == T_OBJECT, "putter base is object");
2497 assert(sig->type_at(1)->basic_type() == T_LONG, "putter offset is correct");
2498 } else {
2499 assert(sig->count() == 2, "native putter has 2 arguments");
2500 assert(sig->type_at(0)->basic_type() == T_LONG, "putter base is long");
2501 }
2502 BasicType vtype = sig->type_at(sig->count()-1)->basic_type();
2503 if (vtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::putAddress_name())
2504 vtype = T_ADDRESS; // it is really a C void*
2505 assert(vtype == type, "putter must accept the expected value");
2506 }
2507 #endif // ASSERT
2508 }
2509 #endif //PRODUCT
2510
2511 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe".
2512
2513 Node* receiver = argument(0); // type: oop
2514
2515 // Build address expression. See the code in inline_unsafe_prefetch.
2516 Node* adr;
2517 Node* heap_base_oop = top();
2518 Node* offset = top();
2519 Node* val;
2520
2521 if (!is_native_ptr) {
2522 // The base is either a Java object or a value produced by Unsafe.staticFieldBase
2523 Node* base = argument(1); // type: oop
2524 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset
2525 offset = argument(2); // type: long
2526 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset
2527 // to be plain byte offsets, which are also the same as those accepted
2528 // by oopDesc::field_base.
2529 assert(Unsafe_field_offset_to_byte_offset(11) == 11,
2530 "fieldOffset must be byte-scaled");
2531 // 32-bit machines ignore the high half!
2532 offset = ConvL2X(offset);
2533 adr = make_unsafe_address(base, offset);
2534 heap_base_oop = base;
2535 val = is_store ? argument(4) : NULL;
2536 } else {
2537 Node* ptr = argument(1); // type: long
2538 ptr = ConvL2X(ptr); // adjust Java long to machine word
2539 adr = make_unsafe_address(NULL, ptr);
2540 val = is_store ? argument(3) : NULL;
2541 }
2542
2543 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr();
2544
2545 // First guess at the value type.
2546 const Type *value_type = Type::get_const_basic_type(type);
2547
2548 // Try to categorize the address. If it comes up as TypeJavaPtr::BOTTOM,
2549 // there was not enough information to nail it down.
2550 Compile::AliasType* alias_type = C->alias_type(adr_type);
2551 assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here");
2552
2553 // We will need memory barriers unless we can determine a unique
2554 // alias category for this reference. (Note: If for some reason
2555 // the barriers get omitted and the unsafe reference begins to "pollute"
2556 // the alias analysis of the rest of the graph, either Compile::can_alias
2557 // or Compile::must_alias will throw a diagnostic assert.)
2558 bool need_mem_bar = (alias_type->adr_type() == TypeOopPtr::BOTTOM);
2559
2560 // If we are reading the value of the referent field of a Reference
2561 // object (either by using Unsafe directly or through reflection)
2562 // then, if G1 is enabled, we need to record the referent in an
2563 // SATB log buffer using the pre-barrier mechanism.
2564 // Also we need to add memory barrier to prevent commoning reads
2565 // from this field across safepoint since GC can change its value.
2566 bool need_read_barrier = !is_native_ptr && !is_store &&
2567 offset != top() && heap_base_oop != top();
2568
2569 if (!is_store && type == T_OBJECT) {
2570 const TypeOopPtr* tjp = sharpen_unsafe_type(alias_type, adr_type, is_native_ptr);
2571 if (tjp != NULL) {
2572 value_type = tjp;
2573 }
2574 }
2575
2576 receiver = null_check(receiver);
2577 if (stopped()) {
2578 return true;
2579 }
2580 // Heap pointers get a null-check from the interpreter,
2581 // as a courtesy. However, this is not guaranteed by Unsafe,
2582 // and it is not possible to fully distinguish unintended nulls
2583 // from intended ones in this API.
2584
2585 if (is_volatile) {
2586 // We need to emit leading and trailing CPU membars (see below) in
2587 // addition to memory membars when is_volatile. This is a little
2588 // too strong, but avoids the need to insert per-alias-type
2589 // volatile membars (for stores; compare Parse::do_put_xxx), which
2590 // we cannot do effectively here because we probably only have a
2591 // rough approximation of type.
2592 need_mem_bar = true;
2593 // For Stores, place a memory ordering barrier now.
2594 if (is_store) {
2595 insert_mem_bar(Op_MemBarRelease);
2596 } else {
2597 if (support_IRIW_for_not_multiple_copy_atomic_cpu) {
2598 insert_mem_bar(Op_MemBarVolatile);
2599 }
2600 }
2601 }
2602
2603 // Memory barrier to prevent normal and 'unsafe' accesses from
2604 // bypassing each other. Happens after null checks, so the
2605 // exception paths do not take memory state from the memory barrier,
2606 // so there's no problems making a strong assert about mixing users
2607 // of safe & unsafe memory. Otherwise fails in a CTW of rt.jar
2608 // around 5701, class sun/reflect/UnsafeBooleanFieldAccessorImpl.
2609 if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder);
2610
2611 if (!is_store) {
2612 MemNode::MemOrd mo = is_volatile ? MemNode::acquire : MemNode::unordered;
2613 Node* p = make_load(control(), adr, value_type, type, adr_type, mo, is_volatile);
2614 // load value
2615 switch (type) {
2616 case T_BOOLEAN:
2617 case T_CHAR:
2618 case T_BYTE:
2619 case T_SHORT:
2620 case T_INT:
2621 case T_LONG:
2622 case T_FLOAT:
2623 case T_DOUBLE:
2624 break;
2625 case T_OBJECT:
2626 if (need_read_barrier) {
2627 insert_pre_barrier(heap_base_oop, offset, p, !(is_volatile || need_mem_bar));
2628 }
2629 break;
2630 case T_ADDRESS:
2631 // Cast to an int type.
2632 p = _gvn.transform(new CastP2XNode(NULL, p));
2633 p = ConvX2UL(p);
2634 break;
2635 default:
2636 fatal(err_msg_res("unexpected type %d: %s", type, type2name(type)));
2637 break;
2638 }
2639 // The load node has the control of the preceding MemBarCPUOrder. All
2640 // following nodes will have the control of the MemBarCPUOrder inserted at
2641 // the end of this method. So, pushing the load onto the stack at a later
2642 // point is fine.
2643 set_result(p);
2644 } else {
2645 // place effect of store into memory
2646 switch (type) {
2647 case T_DOUBLE:
2648 val = dstore_rounding(val);
2649 break;
2650 case T_ADDRESS:
2651 // Repackage the long as a pointer.
2652 val = ConvL2X(val);
2653 val = _gvn.transform(new CastX2PNode(val));
2654 break;
2655 }
2656
2657 MemNode::MemOrd mo = is_volatile ? MemNode::release : MemNode::unordered;
2658 if (type != T_OBJECT ) {
2659 (void) store_to_memory(control(), adr, val, type, adr_type, mo, is_volatile);
2660 } else {
2661 // Possibly an oop being stored to Java heap or native memory
2662 if (!TypePtr::NULL_PTR->higher_equal(_gvn.type(heap_base_oop))) {
2663 // oop to Java heap.
2664 (void) store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type, mo);
2665 } else {
2666 // We can't tell at compile time if we are storing in the Java heap or outside
2667 // of it. So we need to emit code to conditionally do the proper type of
2668 // store.
2669
2670 IdealKit ideal(this);
2671 #define __ ideal.
2672 // QQQ who knows what probability is here??
2673 __ if_then(heap_base_oop, BoolTest::ne, null(), PROB_UNLIKELY(0.999)); {
2674 // Sync IdealKit and graphKit.
2675 sync_kit(ideal);
2676 Node* st = store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type, mo);
2677 // Update IdealKit memory.
2678 __ sync_kit(this);
2679 } __ else_(); {
2680 __ store(__ ctrl(), adr, val, type, alias_type->index(), mo, is_volatile);
2681 } __ end_if();
2682 // Final sync IdealKit and GraphKit.
2683 final_sync(ideal);
2684 #undef __
2685 }
2686 }
2687 }
2688
2689 if (is_volatile) {
2690 if (!is_store) {
2691 insert_mem_bar(Op_MemBarAcquire);
2692 } else {
2693 if (!support_IRIW_for_not_multiple_copy_atomic_cpu) {
2694 insert_mem_bar(Op_MemBarVolatile);
2695 }
2696 }
2697 }
2698
2699 if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder);
2700
2701 return true;
2702 }
2703
2704 //----------------------------inline_unsafe_prefetch----------------------------
2705
2706 bool LibraryCallKit::inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static) {
2707 #ifndef PRODUCT
2708 {
2709 ResourceMark rm;
2710 // Check the signatures.
2711 ciSignature* sig = callee()->signature();
2712 #ifdef ASSERT
2713 // Object getObject(Object base, int/long offset), etc.
2714 BasicType rtype = sig->return_type()->basic_type();
2715 if (!is_native_ptr) {
2716 assert(sig->count() == 2, "oop prefetch has 2 arguments");
2717 assert(sig->type_at(0)->basic_type() == T_OBJECT, "prefetch base is object");
2718 assert(sig->type_at(1)->basic_type() == T_LONG, "prefetcha offset is correct");
2719 } else {
2720 assert(sig->count() == 1, "native prefetch has 1 argument");
2721 assert(sig->type_at(0)->basic_type() == T_LONG, "prefetch base is long");
2722 }
2723 #endif // ASSERT
2724 }
2725 #endif // !PRODUCT
2726
2727 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe".
2728
2729 const int idx = is_static ? 0 : 1;
2730 if (!is_static) {
2731 null_check_receiver();
2732 if (stopped()) {
2733 return true;
2734 }
2735 }
2736
2737 // Build address expression. See the code in inline_unsafe_access.
2738 Node *adr;
2739 if (!is_native_ptr) {
2740 // The base is either a Java object or a value produced by Unsafe.staticFieldBase
2741 Node* base = argument(idx + 0); // type: oop
2742 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset
2743 Node* offset = argument(idx + 1); // type: long
2744 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset
2745 // to be plain byte offsets, which are also the same as those accepted
2746 // by oopDesc::field_base.
2747 assert(Unsafe_field_offset_to_byte_offset(11) == 11,
2748 "fieldOffset must be byte-scaled");
2749 // 32-bit machines ignore the high half!
2750 offset = ConvL2X(offset);
2751 adr = make_unsafe_address(base, offset);
2752 } else {
2753 Node* ptr = argument(idx + 0); // type: long
2754 ptr = ConvL2X(ptr); // adjust Java long to machine word
2755 adr = make_unsafe_address(NULL, ptr);
2756 }
2757
2758 // Generate the read or write prefetch
2759 Node *prefetch;
2760 if (is_store) {
2761 prefetch = new PrefetchWriteNode(i_o(), adr);
2762 } else {
2763 prefetch = new PrefetchReadNode(i_o(), adr);
2764 }
2765 prefetch->init_req(0, control());
2766 set_i_o(_gvn.transform(prefetch));
2767
2768 return true;
2769 }
2770
2771 //----------------------------inline_unsafe_load_store----------------------------
2772 // This method serves a couple of different customers (depending on LoadStoreKind):
2773 //
2774 // LS_cmpxchg:
2775 // public final native boolean compareAndSwapObject(Object o, long offset, Object expected, Object x);
2776 // public final native boolean compareAndSwapInt( Object o, long offset, int expected, int x);
2777 // public final native boolean compareAndSwapLong( Object o, long offset, long expected, long x);
2778 //
2779 // LS_xadd:
2780 // public int getAndAddInt( Object o, long offset, int delta)
2781 // public long getAndAddLong(Object o, long offset, long delta)
2782 //
2783 // LS_xchg:
2784 // int getAndSet(Object o, long offset, int newValue)
2785 // long getAndSet(Object o, long offset, long newValue)
2786 // Object getAndSet(Object o, long offset, Object newValue)
2787 //
2788 bool LibraryCallKit::inline_unsafe_load_store(BasicType type, LoadStoreKind kind) {
2789 // This basic scheme here is the same as inline_unsafe_access, but
2790 // differs in enough details that combining them would make the code
2791 // overly confusing. (This is a true fact! I originally combined
2792 // them, but even I was confused by it!) As much code/comments as
2793 // possible are retained from inline_unsafe_access though to make
2794 // the correspondences clearer. - dl
2795
2796 if (callee()->is_static()) return false; // caller must have the capability!
2797
2798 #ifndef PRODUCT
2799 BasicType rtype;
2800 {
2801 ResourceMark rm;
2802 // Check the signatures.
2803 ciSignature* sig = callee()->signature();
2804 rtype = sig->return_type()->basic_type();
2805 if (kind == LS_xadd || kind == LS_xchg) {
2806 // Check the signatures.
2807 #ifdef ASSERT
2808 assert(rtype == type, "get and set must return the expected type");
2809 assert(sig->count() == 3, "get and set has 3 arguments");
2810 assert(sig->type_at(0)->basic_type() == T_OBJECT, "get and set base is object");
2811 assert(sig->type_at(1)->basic_type() == T_LONG, "get and set offset is long");
2812 assert(sig->type_at(2)->basic_type() == type, "get and set must take expected type as new value/delta");
2813 #endif // ASSERT
2814 } else if (kind == LS_cmpxchg) {
2815 // Check the signatures.
2816 #ifdef ASSERT
2817 assert(rtype == T_BOOLEAN, "CAS must return boolean");
2818 assert(sig->count() == 4, "CAS has 4 arguments");
2819 assert(sig->type_at(0)->basic_type() == T_OBJECT, "CAS base is object");
2820 assert(sig->type_at(1)->basic_type() == T_LONG, "CAS offset is long");
2821 #endif // ASSERT
2822 } else {
2823 ShouldNotReachHere();
2824 }
2825 }
2826 #endif //PRODUCT
2827
2828 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe".
2829
2830 // Get arguments:
2831 Node* receiver = NULL;
2832 Node* base = NULL;
2833 Node* offset = NULL;
2834 Node* oldval = NULL;
2835 Node* newval = NULL;
2836 if (kind == LS_cmpxchg) {
2837 const bool two_slot_type = type2size[type] == 2;
2838 receiver = argument(0); // type: oop
2839 base = argument(1); // type: oop
2840 offset = argument(2); // type: long
2841 oldval = argument(4); // type: oop, int, or long
2842 newval = argument(two_slot_type ? 6 : 5); // type: oop, int, or long
2843 } else if (kind == LS_xadd || kind == LS_xchg){
2844 receiver = argument(0); // type: oop
2845 base = argument(1); // type: oop
2846 offset = argument(2); // type: long
2847 oldval = NULL;
2848 newval = argument(4); // type: oop, int, or long
2849 }
2850
2851 // Null check receiver.
2852 receiver = null_check(receiver);
2853 if (stopped()) {
2854 return true;
2855 }
2856
2857 // Build field offset expression.
2858 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset
2859 // to be plain byte offsets, which are also the same as those accepted
2860 // by oopDesc::field_base.
2861 assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled");
2862 // 32-bit machines ignore the high half of long offsets
2863 offset = ConvL2X(offset);
2864 Node* adr = make_unsafe_address(base, offset);
2865 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr();
2866
2867 // For CAS, unlike inline_unsafe_access, there seems no point in
2868 // trying to refine types. Just use the coarse types here.
2869 const Type *value_type = Type::get_const_basic_type(type);
2870 Compile::AliasType* alias_type = C->alias_type(adr_type);
2871 assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here");
2872
2873 if (kind == LS_xchg && type == T_OBJECT) {
2874 const TypeOopPtr* tjp = sharpen_unsafe_type(alias_type, adr_type);
2875 if (tjp != NULL) {
2876 value_type = tjp;
2877 }
2878 }
2879
2880 int alias_idx = C->get_alias_index(adr_type);
2881
2882 // Memory-model-wise, a LoadStore acts like a little synchronized
2883 // block, so needs barriers on each side. These don't translate
2884 // into actual barriers on most machines, but we still need rest of
2885 // compiler to respect ordering.
2886
2887 insert_mem_bar(Op_MemBarRelease);
2888 insert_mem_bar(Op_MemBarCPUOrder);
2889
2890 // 4984716: MemBars must be inserted before this
2891 // memory node in order to avoid a false
2892 // dependency which will confuse the scheduler.
2893 Node *mem = memory(alias_idx);
2894
2895 // For now, we handle only those cases that actually exist: ints,
2896 // longs, and Object. Adding others should be straightforward.
2897 Node* load_store;
2898 switch(type) {
2899 case T_INT:
2900 if (kind == LS_xadd) {
2901 load_store = _gvn.transform(new GetAndAddINode(control(), mem, adr, newval, adr_type));
2902 } else if (kind == LS_xchg) {
2903 load_store = _gvn.transform(new GetAndSetINode(control(), mem, adr, newval, adr_type));
2904 } else if (kind == LS_cmpxchg) {
2905 load_store = _gvn.transform(new CompareAndSwapINode(control(), mem, adr, newval, oldval));
2906 } else {
2907 ShouldNotReachHere();
2908 }
2909 break;
2910 case T_LONG:
2911 if (kind == LS_xadd) {
2912 load_store = _gvn.transform(new GetAndAddLNode(control(), mem, adr, newval, adr_type));
2913 } else if (kind == LS_xchg) {
2914 load_store = _gvn.transform(new GetAndSetLNode(control(), mem, adr, newval, adr_type));
2915 } else if (kind == LS_cmpxchg) {
2916 load_store = _gvn.transform(new CompareAndSwapLNode(control(), mem, adr, newval, oldval));
2917 } else {
2918 ShouldNotReachHere();
2919 }
2920 break;
2921 case T_OBJECT:
2922 // Transformation of a value which could be NULL pointer (CastPP #NULL)
2923 // could be delayed during Parse (for example, in adjust_map_after_if()).
2924 // Execute transformation here to avoid barrier generation in such case.
2925 if (_gvn.type(newval) == TypePtr::NULL_PTR)
2926 newval = _gvn.makecon(TypePtr::NULL_PTR);
2927
2928 // Reference stores need a store barrier.
2929 if (kind == LS_xchg) {
2930 // If pre-barrier must execute before the oop store, old value will require do_load here.
2931 if (!can_move_pre_barrier()) {
2932 pre_barrier(true /* do_load*/,
2933 control(), base, adr, alias_idx, newval, value_type->make_oopptr(),
2934 NULL /* pre_val*/,
2935 T_OBJECT);
2936 } // Else move pre_barrier to use load_store value, see below.
2937 } else if (kind == LS_cmpxchg) {
2938 // Same as for newval above:
2939 if (_gvn.type(oldval) == TypePtr::NULL_PTR) {
2940 oldval = _gvn.makecon(TypePtr::NULL_PTR);
2941 }
2942 // The only known value which might get overwritten is oldval.
2943 pre_barrier(false /* do_load */,
2944 control(), NULL, NULL, max_juint, NULL, NULL,
2945 oldval /* pre_val */,
2946 T_OBJECT);
2947 } else {
2948 ShouldNotReachHere();
2949 }
2950
2951 #ifdef _LP64
2952 if (adr->bottom_type()->is_ptr_to_narrowoop()) {
2953 Node *newval_enc = _gvn.transform(new EncodePNode(newval, newval->bottom_type()->make_narrowoop()));
2954 if (kind == LS_xchg) {
2955 load_store = _gvn.transform(new GetAndSetNNode(control(), mem, adr,
2956 newval_enc, adr_type, value_type->make_narrowoop()));
2957 } else {
2958 assert(kind == LS_cmpxchg, "wrong LoadStore operation");
2959 Node *oldval_enc = _gvn.transform(new EncodePNode(oldval, oldval->bottom_type()->make_narrowoop()));
2960 load_store = _gvn.transform(new CompareAndSwapNNode(control(), mem, adr,
2961 newval_enc, oldval_enc));
2962 }
2963 } else
2964 #endif
2965 {
2966 if (kind == LS_xchg) {
2967 load_store = _gvn.transform(new GetAndSetPNode(control(), mem, adr, newval, adr_type, value_type->is_oopptr()));
2968 } else {
2969 assert(kind == LS_cmpxchg, "wrong LoadStore operation");
2970 load_store = _gvn.transform(new CompareAndSwapPNode(control(), mem, adr, newval, oldval));
2971 }
2972 }
2973 post_barrier(control(), load_store, base, adr, alias_idx, newval, T_OBJECT, true);
2974 break;
2975 default:
2976 fatal(err_msg_res("unexpected type %d: %s", type, type2name(type)));
2977 break;
2978 }
2979
2980 // SCMemProjNodes represent the memory state of a LoadStore. Their
2981 // main role is to prevent LoadStore nodes from being optimized away
2982 // when their results aren't used.
2983 Node* proj = _gvn.transform(new SCMemProjNode(load_store));
2984 set_memory(proj, alias_idx);
2985
2986 if (type == T_OBJECT && kind == LS_xchg) {
2987 #ifdef _LP64
2988 if (adr->bottom_type()->is_ptr_to_narrowoop()) {
2989 load_store = _gvn.transform(new DecodeNNode(load_store, load_store->get_ptr_type()));
2990 }
2991 #endif
2992 if (can_move_pre_barrier()) {
2993 // Don't need to load pre_val. The old value is returned by load_store.
2994 // The pre_barrier can execute after the xchg as long as no safepoint
2995 // gets inserted between them.
2996 pre_barrier(false /* do_load */,
2997 control(), NULL, NULL, max_juint, NULL, NULL,
2998 load_store /* pre_val */,
2999 T_OBJECT);
3000 }
3001 }
3002
3003 // Add the trailing membar surrounding the access
3004 insert_mem_bar(Op_MemBarCPUOrder);
3005 insert_mem_bar(Op_MemBarAcquire);
3006
3007 assert(type2size[load_store->bottom_type()->basic_type()] == type2size[rtype], "result type should match");
3008 set_result(load_store);
3009 return true;
3010 }
3011
3012 //----------------------------inline_unsafe_ordered_store----------------------
3013 // public native void sun.misc.Unsafe.putOrderedObject(Object o, long offset, Object x);
3014 // public native void sun.misc.Unsafe.putOrderedInt(Object o, long offset, int x);
3015 // public native void sun.misc.Unsafe.putOrderedLong(Object o, long offset, long x);
3016 bool LibraryCallKit::inline_unsafe_ordered_store(BasicType type) {
3017 // This is another variant of inline_unsafe_access, differing in
3018 // that it always issues store-store ("release") barrier and ensures
3019 // store-atomicity (which only matters for "long").
3020
3021 if (callee()->is_static()) return false; // caller must have the capability!
3022
3023 #ifndef PRODUCT
3024 {
3025 ResourceMark rm;
3026 // Check the signatures.
3027 ciSignature* sig = callee()->signature();
3028 #ifdef ASSERT
3029 BasicType rtype = sig->return_type()->basic_type();
3030 assert(rtype == T_VOID, "must return void");
3031 assert(sig->count() == 3, "has 3 arguments");
3032 assert(sig->type_at(0)->basic_type() == T_OBJECT, "base is object");
3033 assert(sig->type_at(1)->basic_type() == T_LONG, "offset is long");
3034 #endif // ASSERT
3035 }
3036 #endif //PRODUCT
3037
3038 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe".
3039
3040 // Get arguments:
3041 Node* receiver = argument(0); // type: oop
3042 Node* base = argument(1); // type: oop
3043 Node* offset = argument(2); // type: long
3044 Node* val = argument(4); // type: oop, int, or long
3045
3046 // Null check receiver.
3047 receiver = null_check(receiver);
3048 if (stopped()) {
3049 return true;
3050 }
3051
3052 // Build field offset expression.
3053 assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled");
3054 // 32-bit machines ignore the high half of long offsets
3055 offset = ConvL2X(offset);
3056 Node* adr = make_unsafe_address(base, offset);
3057 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr();
3058 const Type *value_type = Type::get_const_basic_type(type);
3059 Compile::AliasType* alias_type = C->alias_type(adr_type);
3060
3061 insert_mem_bar(Op_MemBarRelease);
3062 insert_mem_bar(Op_MemBarCPUOrder);
3063 // Ensure that the store is atomic for longs:
3064 const bool require_atomic_access = true;
3065 Node* store;
3066 if (type == T_OBJECT) // reference stores need a store barrier.
3067 store = store_oop_to_unknown(control(), base, adr, adr_type, val, type, MemNode::release);
3068 else {
3069 store = store_to_memory(control(), adr, val, type, adr_type, MemNode::release, require_atomic_access);
3070 }
3071 insert_mem_bar(Op_MemBarCPUOrder);
3072 return true;
3073 }
3074
3075 bool LibraryCallKit::inline_unsafe_fence(vmIntrinsics::ID id) {
3076 // Regardless of form, don't allow previous ld/st to move down,
3077 // then issue acquire, release, or volatile mem_bar.
3078 insert_mem_bar(Op_MemBarCPUOrder);
3079 switch(id) {
3080 case vmIntrinsics::_loadFence:
3081 insert_mem_bar(Op_LoadFence);
3082 return true;
3083 case vmIntrinsics::_storeFence:
3084 insert_mem_bar(Op_StoreFence);
3085 return true;
3086 case vmIntrinsics::_fullFence:
3087 insert_mem_bar(Op_MemBarVolatile);
3088 return true;
3089 default:
3090 fatal_unexpected_iid(id);
3091 return false;
3092 }
3093 }
3094
3095 bool LibraryCallKit::klass_needs_init_guard(Node* kls) {
3096 if (!kls->is_Con()) {
3097 return true;
3098 }
3099 const TypeKlassPtr* klsptr = kls->bottom_type()->isa_klassptr();
3100 if (klsptr == NULL) {
3101 return true;
3102 }
3103 ciInstanceKlass* ik = klsptr->klass()->as_instance_klass();
3104 // don't need a guard for a klass that is already initialized
3105 return !ik->is_initialized();
3106 }
3107
3108 //----------------------------inline_unsafe_allocate---------------------------
3109 // public native Object sun.misc.Unsafe.allocateInstance(Class<?> cls);
3110 bool LibraryCallKit::inline_unsafe_allocate() {
3111 if (callee()->is_static()) return false; // caller must have the capability!
3112
3113 null_check_receiver(); // null-check, then ignore
3114 Node* cls = null_check(argument(1));
3115 if (stopped()) return true;
3116
3117 Node* kls = load_klass_from_mirror(cls, false, NULL, 0);
3118 kls = null_check(kls);
3119 if (stopped()) return true; // argument was like int.class
3120
3121 Node* test = NULL;
3122 if (LibraryCallKit::klass_needs_init_guard(kls)) {
3123 // Note: The argument might still be an illegal value like
3124 // Serializable.class or Object[].class. The runtime will handle it.
3125 // But we must make an explicit check for initialization.
3126 Node* insp = basic_plus_adr(kls, in_bytes(InstanceKlass::init_state_offset()));
3127 // Use T_BOOLEAN for InstanceKlass::_init_state so the compiler
3128 // can generate code to load it as unsigned byte.
3129 Node* inst = make_load(NULL, insp, TypeInt::UBYTE, T_BOOLEAN, MemNode::unordered);
3130 Node* bits = intcon(InstanceKlass::fully_initialized);
3131 test = _gvn.transform(new SubINode(inst, bits));
3132 // The 'test' is non-zero if we need to take a slow path.
3133 }
3134
3135 Node* obj = new_instance(kls, test);
3136 set_result(obj);
3137 return true;
3138 }
3139
3140 #ifdef TRACE_HAVE_INTRINSICS
3141 /*
3142 * oop -> myklass
3143 * myklass->trace_id |= USED
3144 * return myklass->trace_id & ~0x3
3145 */
3146 bool LibraryCallKit::inline_native_classID() {
3147 null_check_receiver(); // null-check, then ignore
3148 Node* cls = null_check(argument(1), T_OBJECT);
3149 Node* kls = load_klass_from_mirror(cls, false, NULL, 0);
3150 kls = null_check(kls, T_OBJECT);
3151 ByteSize offset = TRACE_ID_OFFSET;
3152 Node* insp = basic_plus_adr(kls, in_bytes(offset));
3153 Node* tvalue = make_load(NULL, insp, TypeLong::LONG, T_LONG, MemNode::unordered);
3154 Node* bits = longcon(~0x03l); // ignore bit 0 & 1
3155 Node* andl = _gvn.transform(new AndLNode(tvalue, bits));
3156 Node* clsused = longcon(0x01l); // set the class bit
3157 Node* orl = _gvn.transform(new OrLNode(tvalue, clsused));
3158
3159 const TypePtr *adr_type = _gvn.type(insp)->isa_ptr();
3160 store_to_memory(control(), insp, orl, T_LONG, adr_type, MemNode::unordered);
3161 set_result(andl);
3162 return true;
3163 }
3164
3165 bool LibraryCallKit::inline_native_threadID() {
3166 Node* tls_ptr = NULL;
3167 Node* cur_thr = generate_current_thread(tls_ptr);
3168 Node* p = basic_plus_adr(top()/*!oop*/, tls_ptr, in_bytes(JavaThread::osthread_offset()));
3169 Node* osthread = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS, MemNode::unordered);
3170 p = basic_plus_adr(top()/*!oop*/, osthread, in_bytes(OSThread::thread_id_offset()));
3171
3172 Node* threadid = NULL;
3173 size_t thread_id_size = OSThread::thread_id_size();
3174 if (thread_id_size == (size_t) BytesPerLong) {
3175 threadid = ConvL2I(make_load(control(), p, TypeLong::LONG, T_LONG, MemNode::unordered));
3176 } else if (thread_id_size == (size_t) BytesPerInt) {
3177 threadid = make_load(control(), p, TypeInt::INT, T_INT, MemNode::unordered);
3178 } else {
3179 ShouldNotReachHere();
3180 }
3181 set_result(threadid);
3182 return true;
3183 }
3184 #endif
3185
3186 //------------------------inline_native_time_funcs--------------
3187 // inline code for System.currentTimeMillis() and System.nanoTime()
3188 // these have the same type and signature
3189 bool LibraryCallKit::inline_native_time_funcs(address funcAddr, const char* funcName) {
3190 const TypeFunc* tf = OptoRuntime::void_long_Type();
3191 const TypePtr* no_memory_effects = NULL;
3192 Node* time = make_runtime_call(RC_LEAF, tf, funcAddr, funcName, no_memory_effects);
3193 Node* value = _gvn.transform(new ProjNode(time, TypeFunc::Parms+0));
3194 #ifdef ASSERT
3195 Node* value_top = _gvn.transform(new ProjNode(time, TypeFunc::Parms+1));
3196 assert(value_top == top(), "second value must be top");
3197 #endif
3198 set_result(value);
3199 return true;
3200 }
3201
3202 //------------------------inline_native_currentThread------------------
3203 bool LibraryCallKit::inline_native_currentThread() {
3204 Node* junk = NULL;
3205 set_result(generate_current_thread(junk));
3206 return true;
3207 }
3208
3209 //------------------------inline_native_isInterrupted------------------
3210 // private native boolean java.lang.Thread.isInterrupted(boolean ClearInterrupted);
3211 bool LibraryCallKit::inline_native_isInterrupted() {
3212 // Add a fast path to t.isInterrupted(clear_int):
3213 // (t == Thread.current() &&
3214 // (!TLS._osthread._interrupted || WINDOWS_ONLY(false) NOT_WINDOWS(!clear_int)))
3215 // ? TLS._osthread._interrupted : /*slow path:*/ t.isInterrupted(clear_int)
3216 // So, in the common case that the interrupt bit is false,
3217 // we avoid making a call into the VM. Even if the interrupt bit
3218 // is true, if the clear_int argument is false, we avoid the VM call.
3219 // However, if the receiver is not currentThread, we must call the VM,
3220 // because there must be some locking done around the operation.
3221
3222 // We only go to the fast case code if we pass two guards.
3223 // Paths which do not pass are accumulated in the slow_region.
3224
3225 enum {
3226 no_int_result_path = 1, // t == Thread.current() && !TLS._osthread._interrupted
3227 no_clear_result_path = 2, // t == Thread.current() && TLS._osthread._interrupted && !clear_int
3228 slow_result_path = 3, // slow path: t.isInterrupted(clear_int)
3229 PATH_LIMIT
3230 };
3231
3232 // Ensure that it's not possible to move the load of TLS._osthread._interrupted flag
3233 // out of the function.
3234 insert_mem_bar(Op_MemBarCPUOrder);
3235
3236 RegionNode* result_rgn = new RegionNode(PATH_LIMIT);
3237 PhiNode* result_val = new PhiNode(result_rgn, TypeInt::BOOL);
3238
3239 RegionNode* slow_region = new RegionNode(1);
3240 record_for_igvn(slow_region);
3241
3242 // (a) Receiving thread must be the current thread.
3243 Node* rec_thr = argument(0);
3244 Node* tls_ptr = NULL;
3245 Node* cur_thr = generate_current_thread(tls_ptr);
3246 Node* cmp_thr = _gvn.transform(new CmpPNode(cur_thr, rec_thr));
3247 Node* bol_thr = _gvn.transform(new BoolNode(cmp_thr, BoolTest::ne));
3248
3249 generate_slow_guard(bol_thr, slow_region);
3250
3251 // (b) Interrupt bit on TLS must be false.
3252 Node* p = basic_plus_adr(top()/*!oop*/, tls_ptr, in_bytes(JavaThread::osthread_offset()));
3253 Node* osthread = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS, MemNode::unordered);
3254 p = basic_plus_adr(top()/*!oop*/, osthread, in_bytes(OSThread::interrupted_offset()));
3255
3256 // Set the control input on the field _interrupted read to prevent it floating up.
3257 Node* int_bit = make_load(control(), p, TypeInt::BOOL, T_INT, MemNode::unordered);
3258 Node* cmp_bit = _gvn.transform(new CmpINode(int_bit, intcon(0)));
3259 Node* bol_bit = _gvn.transform(new BoolNode(cmp_bit, BoolTest::ne));
3260
3261 IfNode* iff_bit = create_and_map_if(control(), bol_bit, PROB_UNLIKELY_MAG(3), COUNT_UNKNOWN);
3262
3263 // First fast path: if (!TLS._interrupted) return false;
3264 Node* false_bit = _gvn.transform(new IfFalseNode(iff_bit));
3265 result_rgn->init_req(no_int_result_path, false_bit);
3266 result_val->init_req(no_int_result_path, intcon(0));
3267
3268 // drop through to next case
3269 set_control( _gvn.transform(new IfTrueNode(iff_bit)));
3270
3271 #ifndef TARGET_OS_FAMILY_windows
3272 // (c) Or, if interrupt bit is set and clear_int is false, use 2nd fast path.
3273 Node* clr_arg = argument(1);
3274 Node* cmp_arg = _gvn.transform(new CmpINode(clr_arg, intcon(0)));
3275 Node* bol_arg = _gvn.transform(new BoolNode(cmp_arg, BoolTest::ne));
3276 IfNode* iff_arg = create_and_map_if(control(), bol_arg, PROB_FAIR, COUNT_UNKNOWN);
3277
3278 // Second fast path: ... else if (!clear_int) return true;
3279 Node* false_arg = _gvn.transform(new IfFalseNode(iff_arg));
3280 result_rgn->init_req(no_clear_result_path, false_arg);
3281 result_val->init_req(no_clear_result_path, intcon(1));
3282
3283 // drop through to next case
3284 set_control( _gvn.transform(new IfTrueNode(iff_arg)));
3285 #else
3286 // To return true on Windows you must read the _interrupted field
3287 // and check the the event state i.e. take the slow path.
3288 #endif // TARGET_OS_FAMILY_windows
3289
3290 // (d) Otherwise, go to the slow path.
3291 slow_region->add_req(control());
3292 set_control( _gvn.transform(slow_region));
3293
3294 if (stopped()) {
3295 // There is no slow path.
3296 result_rgn->init_req(slow_result_path, top());
3297 result_val->init_req(slow_result_path, top());
3298 } else {
3299 // non-virtual because it is a private non-static
3300 CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_isInterrupted);
3301
3302 Node* slow_val = set_results_for_java_call(slow_call);
3303 // this->control() comes from set_results_for_java_call
3304
3305 Node* fast_io = slow_call->in(TypeFunc::I_O);
3306 Node* fast_mem = slow_call->in(TypeFunc::Memory);
3307
3308 // These two phis are pre-filled with copies of of the fast IO and Memory
3309 PhiNode* result_mem = PhiNode::make(result_rgn, fast_mem, Type::MEMORY, TypePtr::BOTTOM);
3310 PhiNode* result_io = PhiNode::make(result_rgn, fast_io, Type::ABIO);
3311
3312 result_rgn->init_req(slow_result_path, control());
3313 result_io ->init_req(slow_result_path, i_o());
3314 result_mem->init_req(slow_result_path, reset_memory());
3315 result_val->init_req(slow_result_path, slow_val);
3316
3317 set_all_memory(_gvn.transform(result_mem));
3318 set_i_o( _gvn.transform(result_io));
3319 }
3320
3321 C->set_has_split_ifs(true); // Has chance for split-if optimization
3322 set_result(result_rgn, result_val);
3323 return true;
3324 }
3325
3326 //---------------------------load_mirror_from_klass----------------------------
3327 // Given a klass oop, load its java mirror (a java.lang.Class oop).
3328 Node* LibraryCallKit::load_mirror_from_klass(Node* klass) {
3329 Node* p = basic_plus_adr(klass, in_bytes(Klass::java_mirror_offset()));
3330 return make_load(NULL, p, TypeInstPtr::MIRROR, T_OBJECT, MemNode::unordered);
3331 }
3332
3333 //-----------------------load_klass_from_mirror_common-------------------------
3334 // Given a java mirror (a java.lang.Class oop), load its corresponding klass oop.
3335 // Test the klass oop for null (signifying a primitive Class like Integer.TYPE),
3336 // and branch to the given path on the region.
3337 // If never_see_null, take an uncommon trap on null, so we can optimistically
3338 // compile for the non-null case.
3339 // If the region is NULL, force never_see_null = true.
3340 Node* LibraryCallKit::load_klass_from_mirror_common(Node* mirror,
3341 bool never_see_null,
3342 RegionNode* region,
3343 int null_path,
3344 int offset) {
3345 if (region == NULL) never_see_null = true;
3346 Node* p = basic_plus_adr(mirror, offset);
3347 const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL;
3348 Node* kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, kls_type));
3349 Node* null_ctl = top();
3350 kls = null_check_oop(kls, &null_ctl, never_see_null);
3351 if (region != NULL) {
3352 // Set region->in(null_path) if the mirror is a primitive (e.g, int.class).
3353 region->init_req(null_path, null_ctl);
3354 } else {
3355 assert(null_ctl == top(), "no loose ends");
3356 }
3357 return kls;
3358 }
3359
3360 //--------------------(inline_native_Class_query helpers)---------------------
3361 // Use this for JVM_ACC_INTERFACE, JVM_ACC_IS_CLONEABLE, JVM_ACC_HAS_FINALIZER.
3362 // Fall through if (mods & mask) == bits, take the guard otherwise.
3363 Node* LibraryCallKit::generate_access_flags_guard(Node* kls, int modifier_mask, int modifier_bits, RegionNode* region) {
3364 // Branch around if the given klass has the given modifier bit set.
3365 // Like generate_guard, adds a new path onto the region.
3366 Node* modp = basic_plus_adr(kls, in_bytes(Klass::access_flags_offset()));
3367 Node* mods = make_load(NULL, modp, TypeInt::INT, T_INT, MemNode::unordered);
3368 Node* mask = intcon(modifier_mask);
3369 Node* bits = intcon(modifier_bits);
3370 Node* mbit = _gvn.transform(new AndINode(mods, mask));
3371 Node* cmp = _gvn.transform(new CmpINode(mbit, bits));
3372 Node* bol = _gvn.transform(new BoolNode(cmp, BoolTest::ne));
3373 return generate_fair_guard(bol, region);
3374 }
3375 Node* LibraryCallKit::generate_interface_guard(Node* kls, RegionNode* region) {
3376 return generate_access_flags_guard(kls, JVM_ACC_INTERFACE, 0, region);
3377 }
3378
3379 //-------------------------inline_native_Class_query-------------------
3380 bool LibraryCallKit::inline_native_Class_query(vmIntrinsics::ID id) {
3381 const Type* return_type = TypeInt::BOOL;
3382 Node* prim_return_value = top(); // what happens if it's a primitive class?
3383 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check);
3384 bool expect_prim = false; // most of these guys expect to work on refs
3385
3386 enum { _normal_path = 1, _prim_path = 2, PATH_LIMIT };
3387
3388 Node* mirror = argument(0);
3389 Node* obj = top();
3390
3391 switch (id) {
3392 case vmIntrinsics::_isInstance:
3393 // nothing is an instance of a primitive type
3394 prim_return_value = intcon(0);
3395 obj = argument(1);
3396 break;
3397 case vmIntrinsics::_getModifiers:
3398 prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
3399 assert(is_power_of_2((int)JVM_ACC_WRITTEN_FLAGS+1), "change next line");
3400 return_type = TypeInt::make(0, JVM_ACC_WRITTEN_FLAGS, Type::WidenMin);
3401 break;
3402 case vmIntrinsics::_isInterface:
3403 prim_return_value = intcon(0);
3404 break;
3405 case vmIntrinsics::_isArray:
3406 prim_return_value = intcon(0);
3407 expect_prim = true; // cf. ObjectStreamClass.getClassSignature
3408 break;
3409 case vmIntrinsics::_isPrimitive:
3410 prim_return_value = intcon(1);
3411 expect_prim = true; // obviously
3412 break;
3413 case vmIntrinsics::_getSuperclass:
3414 prim_return_value = null();
3415 return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR);
3416 break;
3417 case vmIntrinsics::_getClassAccessFlags:
3418 prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
3419 return_type = TypeInt::INT; // not bool! 6297094
3420 break;
3421 default:
3422 fatal_unexpected_iid(id);
3423 break;
3424 }
3425
3426 const TypeInstPtr* mirror_con = _gvn.type(mirror)->isa_instptr();
3427 if (mirror_con == NULL) return false; // cannot happen?
3428
3429 #ifndef PRODUCT
3430 if (C->print_intrinsics() || C->print_inlining()) {
3431 ciType* k = mirror_con->java_mirror_type();
3432 if (k) {
3433 tty->print("Inlining %s on constant Class ", vmIntrinsics::name_at(intrinsic_id()));
3434 k->print_name();
3435 tty->cr();
3436 }
3437 }
3438 #endif
3439
3440 // Null-check the mirror, and the mirror's klass ptr (in case it is a primitive).
3441 RegionNode* region = new RegionNode(PATH_LIMIT);
3442 record_for_igvn(region);
3443 PhiNode* phi = new PhiNode(region, return_type);
3444
3445 // The mirror will never be null of Reflection.getClassAccessFlags, however
3446 // it may be null for Class.isInstance or Class.getModifiers. Throw a NPE
3447 // if it is. See bug 4774291.
3448
3449 // For Reflection.getClassAccessFlags(), the null check occurs in
3450 // the wrong place; see inline_unsafe_access(), above, for a similar
3451 // situation.
3452 mirror = null_check(mirror);
3453 // If mirror or obj is dead, only null-path is taken.
3454 if (stopped()) return true;
3455
3456 if (expect_prim) never_see_null = false; // expect nulls (meaning prims)
3457
3458 // Now load the mirror's klass metaobject, and null-check it.
3459 // Side-effects region with the control path if the klass is null.
3460 Node* kls = load_klass_from_mirror(mirror, never_see_null, region, _prim_path);
3461 // If kls is null, we have a primitive mirror.
3462 phi->init_req(_prim_path, prim_return_value);
3463 if (stopped()) { set_result(region, phi); return true; }
3464 bool safe_for_replace = (region->in(_prim_path) == top());
3465
3466 Node* p; // handy temp
3467 Node* null_ctl;
3468
3469 // Now that we have the non-null klass, we can perform the real query.
3470 // For constant classes, the query will constant-fold in LoadNode::Value.
3471 Node* query_value = top();
3472 switch (id) {
3473 case vmIntrinsics::_isInstance:
3474 // nothing is an instance of a primitive type
3475 query_value = gen_instanceof(obj, kls, safe_for_replace);
3476 break;
3477
3478 case vmIntrinsics::_getModifiers:
3479 p = basic_plus_adr(kls, in_bytes(Klass::modifier_flags_offset()));
3480 query_value = make_load(NULL, p, TypeInt::INT, T_INT, MemNode::unordered);
3481 break;
3482
3483 case vmIntrinsics::_isInterface:
3484 // (To verify this code sequence, check the asserts in JVM_IsInterface.)
3485 if (generate_interface_guard(kls, region) != NULL)
3486 // A guard was added. If the guard is taken, it was an interface.
3487 phi->add_req(intcon(1));
3488 // If we fall through, it's a plain class.
3489 query_value = intcon(0);
3490 break;
3491
3492 case vmIntrinsics::_isArray:
3493 // (To verify this code sequence, check the asserts in JVM_IsArrayClass.)
3494 if (generate_array_guard(kls, region) != NULL)
3495 // A guard was added. If the guard is taken, it was an array.
3496 phi->add_req(intcon(1));
3497 // If we fall through, it's a plain class.
3498 query_value = intcon(0);
3499 break;
3500
3501 case vmIntrinsics::_isPrimitive:
3502 query_value = intcon(0); // "normal" path produces false
3503 break;
3504
3505 case vmIntrinsics::_getSuperclass:
3506 // The rules here are somewhat unfortunate, but we can still do better
3507 // with random logic than with a JNI call.
3508 // Interfaces store null or Object as _super, but must report null.
3509 // Arrays store an intermediate super as _super, but must report Object.
3510 // Other types can report the actual _super.
3511 // (To verify this code sequence, check the asserts in JVM_IsInterface.)
3512 if (generate_interface_guard(kls, region) != NULL)
3513 // A guard was added. If the guard is taken, it was an interface.
3514 phi->add_req(null());
3515 if (generate_array_guard(kls, region) != NULL)
3516 // A guard was added. If the guard is taken, it was an array.
3517 phi->add_req(makecon(TypeInstPtr::make(env()->Object_klass()->java_mirror())));
3518 // If we fall through, it's a plain class. Get its _super.
3519 p = basic_plus_adr(kls, in_bytes(Klass::super_offset()));
3520 kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, TypeKlassPtr::OBJECT_OR_NULL));
3521 null_ctl = top();
3522 kls = null_check_oop(kls, &null_ctl);
3523 if (null_ctl != top()) {
3524 // If the guard is taken, Object.superClass is null (both klass and mirror).
3525 region->add_req(null_ctl);
3526 phi ->add_req(null());
3527 }
3528 if (!stopped()) {
3529 query_value = load_mirror_from_klass(kls);
3530 }
3531 break;
3532
3533 case vmIntrinsics::_getClassAccessFlags:
3534 p = basic_plus_adr(kls, in_bytes(Klass::access_flags_offset()));
3535 query_value = make_load(NULL, p, TypeInt::INT, T_INT, MemNode::unordered);
3536 break;
3537
3538 default:
3539 fatal_unexpected_iid(id);
3540 break;
3541 }
3542
3543 // Fall-through is the normal case of a query to a real class.
3544 phi->init_req(1, query_value);
3545 region->init_req(1, control());
3546
3547 C->set_has_split_ifs(true); // Has chance for split-if optimization
3548 set_result(region, phi);
3549 return true;
3550 }
3551
3552 //-------------------------inline_Class_cast-------------------
3553 bool LibraryCallKit::inline_Class_cast() {
3554 // See if we can statically collapse isInstance() check in Class.cast();
3555 Node* mirror = argument(0); // Class
3556 Node* obj = argument(1);
3557
3558 const TypeInstPtr* mirror_con = _gvn.type(mirror)->isa_instptr();
3559 if (mirror_con == NULL) {
3560 return false; // cannot happen?
3561 }
3562 const TypeOopPtr* obj_type = _gvn.type(obj)->isa_oopptr();
3563 if (obj_type == NULL) {
3564 return false; // skip NULL_PTR and TOP
3565 }
3566
3567 assert(mirror_con->klass()->as_instance_klass() == C->env()->Class_klass(), "sanity");
3568 // We are loading a special hidden field from a Class mirror object,
3569 // the field which points to the VM's Klass metaobject.
3570
3571 // java_mirror_type returns non-null for compile-time Class constants.
3572 ciType* t = mirror_con->java_mirror_type();
3573 if (t == NULL || !t->is_klass()) {
3574 return false; // non-constant or primitive Class
3575 }
3576 // constant oop => constant klass
3577 const TypeKlassPtr* superklass = TypeKlassPtr::make(t->as_klass());
3578
3579 if (superklass->singleton()) {
3580 ciKlass* superk = superklass->klass();
3581 ciKlass* subk = obj_type->klass();
3582 if (subk != NULL && subk->is_loaded()) {
3583 int static_res = C->static_subtype_check(superk, subk);
3584 if (static_res == Compile::SSC_always_true) {
3585 // isInstance() is true
3586 set_result(obj);
3587 return true;
3588 }
3589 }
3590 }
3591
3592 return false;
3593 }
3594
3595 //--------------------------inline_native_subtype_check------------------------
3596 // This intrinsic takes the JNI calls out of the heart of
3597 // UnsafeFieldAccessorImpl.set, which improves Field.set, readObject, etc.
3598 bool LibraryCallKit::inline_native_subtype_check() {
3599 // Pull both arguments off the stack.
3600 Node* args[2]; // two java.lang.Class mirrors: superc, subc
3601 args[0] = argument(0);
3602 args[1] = argument(1);
3603 Node* klasses[2]; // corresponding Klasses: superk, subk
3604 klasses[0] = klasses[1] = top();
3605
3606 enum {
3607 // A full decision tree on {superc is prim, subc is prim}:
3608 _prim_0_path = 1, // {P,N} => false
3609 // {P,P} & superc!=subc => false
3610 _prim_same_path, // {P,P} & superc==subc => true
3611 _prim_1_path, // {N,P} => false
3612 _ref_subtype_path, // {N,N} & subtype check wins => true
3613 _both_ref_path, // {N,N} & subtype check loses => false
3614 PATH_LIMIT
3615 };
3616
3617 RegionNode* region = new RegionNode(PATH_LIMIT);
3618 Node* phi = new PhiNode(region, TypeInt::BOOL);
3619 record_for_igvn(region);
3620
3621 const TypePtr* adr_type = TypeRawPtr::BOTTOM; // memory type of loads
3622 const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL;
3623 int class_klass_offset = java_lang_Class::klass_offset_in_bytes();
3624
3625 // First null-check both mirrors and load each mirror's klass metaobject.
3626 int which_arg;
3627 for (which_arg = 0; which_arg <= 1; which_arg++) {
3628 Node* arg = args[which_arg];
3629 arg = null_check(arg);
3630 if (stopped()) break;
3631 args[which_arg] = arg;
3632
3633 Node* p = basic_plus_adr(arg, class_klass_offset);
3634 Node* kls = LoadKlassNode::make(_gvn, immutable_memory(), p, adr_type, kls_type);
3635 klasses[which_arg] = _gvn.transform(kls);
3636 }
3637
3638 // Having loaded both klasses, test each for null.
3639 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check);
3640 for (which_arg = 0; which_arg <= 1; which_arg++) {
3641 Node* kls = klasses[which_arg];
3642 Node* null_ctl = top();
3643 kls = null_check_oop(kls, &null_ctl, never_see_null);
3644 int prim_path = (which_arg == 0 ? _prim_0_path : _prim_1_path);
3645 region->init_req(prim_path, null_ctl);
3646 if (stopped()) break;
3647 klasses[which_arg] = kls;
3648 }
3649
3650 if (!stopped()) {
3651 // now we have two reference types, in klasses[0..1]
3652 Node* subk = klasses[1]; // the argument to isAssignableFrom
3653 Node* superk = klasses[0]; // the receiver
3654 region->set_req(_both_ref_path, gen_subtype_check(subk, superk));
3655 // now we have a successful reference subtype check
3656 region->set_req(_ref_subtype_path, control());
3657 }
3658
3659 // If both operands are primitive (both klasses null), then
3660 // we must return true when they are identical primitives.
3661 // It is convenient to test this after the first null klass check.
3662 set_control(region->in(_prim_0_path)); // go back to first null check
3663 if (!stopped()) {
3664 // Since superc is primitive, make a guard for the superc==subc case.
3665 Node* cmp_eq = _gvn.transform(new CmpPNode(args[0], args[1]));
3666 Node* bol_eq = _gvn.transform(new BoolNode(cmp_eq, BoolTest::eq));
3667 generate_guard(bol_eq, region, PROB_FAIR);
3668 if (region->req() == PATH_LIMIT+1) {
3669 // A guard was added. If the added guard is taken, superc==subc.
3670 region->swap_edges(PATH_LIMIT, _prim_same_path);
3671 region->del_req(PATH_LIMIT);
3672 }
3673 region->set_req(_prim_0_path, control()); // Not equal after all.
3674 }
3675
3676 // these are the only paths that produce 'true':
3677 phi->set_req(_prim_same_path, intcon(1));
3678 phi->set_req(_ref_subtype_path, intcon(1));
3679
3680 // pull together the cases:
3681 assert(region->req() == PATH_LIMIT, "sane region");
3682 for (uint i = 1; i < region->req(); i++) {
3683 Node* ctl = region->in(i);
3684 if (ctl == NULL || ctl == top()) {
3685 region->set_req(i, top());
3686 phi ->set_req(i, top());
3687 } else if (phi->in(i) == NULL) {
3688 phi->set_req(i, intcon(0)); // all other paths produce 'false'
3689 }
3690 }
3691
3692 set_control(_gvn.transform(region));
3693 set_result(_gvn.transform(phi));
3694 return true;
3695 }
3696
3697 //---------------------generate_array_guard_common------------------------
3698 Node* LibraryCallKit::generate_array_guard_common(Node* kls, RegionNode* region,
3699 bool obj_array, bool not_array) {
3700 // If obj_array/non_array==false/false:
3701 // Branch around if the given klass is in fact an array (either obj or prim).
3702 // If obj_array/non_array==false/true:
3703 // Branch around if the given klass is not an array klass of any kind.
3704 // If obj_array/non_array==true/true:
3705 // Branch around if the kls is not an oop array (kls is int[], String, etc.)
3706 // If obj_array/non_array==true/false:
3707 // Branch around if the kls is an oop array (Object[] or subtype)
3708 //
3709 // Like generate_guard, adds a new path onto the region.
3710 jint layout_con = 0;
3711 Node* layout_val = get_layout_helper(kls, layout_con);
3712 if (layout_val == NULL) {
3713 bool query = (obj_array
3714 ? Klass::layout_helper_is_objArray(layout_con)
3715 : Klass::layout_helper_is_array(layout_con));
3716 if (query == not_array) {
3717 return NULL; // never a branch
3718 } else { // always a branch
3719 Node* always_branch = control();
3720 if (region != NULL)
3721 region->add_req(always_branch);
3722 set_control(top());
3723 return always_branch;
3724 }
3725 }
3726 // Now test the correct condition.
3727 jint nval = (obj_array
3728 ? ((jint)Klass::_lh_array_tag_type_value
3729 << Klass::_lh_array_tag_shift)
3730 : Klass::_lh_neutral_value);
3731 Node* cmp = _gvn.transform(new CmpINode(layout_val, intcon(nval)));
3732 BoolTest::mask btest = BoolTest::lt; // correct for testing is_[obj]array
3733 // invert the test if we are looking for a non-array
3734 if (not_array) btest = BoolTest(btest).negate();
3735 Node* bol = _gvn.transform(new BoolNode(cmp, btest));
3736 return generate_fair_guard(bol, region);
3737 }
3738
3739
3740 //-----------------------inline_native_newArray--------------------------
3741 // private static native Object java.lang.reflect.newArray(Class<?> componentType, int length);
3742 bool LibraryCallKit::inline_native_newArray() {
3743 Node* mirror = argument(0);
3744 Node* count_val = argument(1);
3745
3746 mirror = null_check(mirror);
3747 // If mirror or obj is dead, only null-path is taken.
3748 if (stopped()) return true;
3749
3750 enum { _normal_path = 1, _slow_path = 2, PATH_LIMIT };
3751 RegionNode* result_reg = new RegionNode(PATH_LIMIT);
3752 PhiNode* result_val = new PhiNode(result_reg, TypeInstPtr::NOTNULL);
3753 PhiNode* result_io = new PhiNode(result_reg, Type::ABIO);
3754 PhiNode* result_mem = new PhiNode(result_reg, Type::MEMORY, TypePtr::BOTTOM);
3755
3756 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check);
3757 Node* klass_node = load_array_klass_from_mirror(mirror, never_see_null,
3758 result_reg, _slow_path);
3759 Node* normal_ctl = control();
3760 Node* no_array_ctl = result_reg->in(_slow_path);
3761
3762 // Generate code for the slow case. We make a call to newArray().
3763 set_control(no_array_ctl);
3764 if (!stopped()) {
3765 // Either the input type is void.class, or else the
3766 // array klass has not yet been cached. Either the
3767 // ensuing call will throw an exception, or else it
3768 // will cache the array klass for next time.
3769 PreserveJVMState pjvms(this);
3770 CallJavaNode* slow_call = generate_method_call_static(vmIntrinsics::_newArray);
3771 Node* slow_result = set_results_for_java_call(slow_call);
3772 // this->control() comes from set_results_for_java_call
3773 result_reg->set_req(_slow_path, control());
3774 result_val->set_req(_slow_path, slow_result);
3775 result_io ->set_req(_slow_path, i_o());
3776 result_mem->set_req(_slow_path, reset_memory());
3777 }
3778
3779 set_control(normal_ctl);
3780 if (!stopped()) {
3781 // Normal case: The array type has been cached in the java.lang.Class.
3782 // The following call works fine even if the array type is polymorphic.
3783 // It could be a dynamic mix of int[], boolean[], Object[], etc.
3784 Node* obj = new_array(klass_node, count_val, 0); // no arguments to push
3785 result_reg->init_req(_normal_path, control());
3786 result_val->init_req(_normal_path, obj);
3787 result_io ->init_req(_normal_path, i_o());
3788 result_mem->init_req(_normal_path, reset_memory());
3789 }
3790
3791 // Return the combined state.
3792 set_i_o( _gvn.transform(result_io) );
3793 set_all_memory( _gvn.transform(result_mem));
3794
3795 C->set_has_split_ifs(true); // Has chance for split-if optimization
3796 set_result(result_reg, result_val);
3797 return true;
3798 }
3799
3800 //----------------------inline_native_getLength--------------------------
3801 // public static native int java.lang.reflect.Array.getLength(Object array);
3802 bool LibraryCallKit::inline_native_getLength() {
3803 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false;
3804
3805 Node* array = null_check(argument(0));
3806 // If array is dead, only null-path is taken.
3807 if (stopped()) return true;
3808
3809 // Deoptimize if it is a non-array.
3810 Node* non_array = generate_non_array_guard(load_object_klass(array), NULL);
3811
3812 if (non_array != NULL) {
3813 PreserveJVMState pjvms(this);
3814 set_control(non_array);
3815 uncommon_trap(Deoptimization::Reason_intrinsic,
3816 Deoptimization::Action_maybe_recompile);
3817 }
3818
3819 // If control is dead, only non-array-path is taken.
3820 if (stopped()) return true;
3821
3822 // The works fine even if the array type is polymorphic.
3823 // It could be a dynamic mix of int[], boolean[], Object[], etc.
3824 Node* result = load_array_length(array);
3825
3826 C->set_has_split_ifs(true); // Has chance for split-if optimization
3827 set_result(result);
3828 return true;
3829 }
3830
3831 //------------------------inline_array_copyOf----------------------------
3832 // public static <T,U> T[] java.util.Arrays.copyOf( U[] original, int newLength, Class<? extends T[]> newType);
3833 // public static <T,U> T[] java.util.Arrays.copyOfRange(U[] original, int from, int to, Class<? extends T[]> newType);
3834 bool LibraryCallKit::inline_array_copyOf(bool is_copyOfRange) {
3835 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false;
3836
3837 // Get the arguments.
3838 Node* original = argument(0);
3839 Node* start = is_copyOfRange? argument(1): intcon(0);
3840 Node* end = is_copyOfRange? argument(2): argument(1);
3841 Node* array_type_mirror = is_copyOfRange? argument(3): argument(2);
3842
3843 Node* newcopy;
3844
3845 // Set the original stack and the reexecute bit for the interpreter to reexecute
3846 // the bytecode that invokes Arrays.copyOf if deoptimization happens.
3847 { PreserveReexecuteState preexecs(this);
3848 jvms()->set_should_reexecute(true);
3849
3850 array_type_mirror = null_check(array_type_mirror);
3851 original = null_check(original);
3852
3853 // Check if a null path was taken unconditionally.
3854 if (stopped()) return true;
3855
3856 Node* orig_length = load_array_length(original);
3857
3858 Node* klass_node = load_klass_from_mirror(array_type_mirror, false, NULL, 0);
3859 klass_node = null_check(klass_node);
3860
3861 RegionNode* bailout = new RegionNode(1);
3862 record_for_igvn(bailout);
3863
3864 // Despite the generic type of Arrays.copyOf, the mirror might be int, int[], etc.
3865 // Bail out if that is so.
3866 Node* not_objArray = generate_non_objArray_guard(klass_node, bailout);
3867 if (not_objArray != NULL) {
3868 // Improve the klass node's type from the new optimistic assumption:
3869 ciKlass* ak = ciArrayKlass::make(env()->Object_klass());
3870 const Type* akls = TypeKlassPtr::make(TypePtr::NotNull, ak, 0/*offset*/);
3871 Node* cast = new CastPPNode(klass_node, akls);
3872 cast->init_req(0, control());
3873 klass_node = _gvn.transform(cast);
3874 }
3875
3876 // Bail out if either start or end is negative.
3877 generate_negative_guard(start, bailout, &start);
3878 generate_negative_guard(end, bailout, &end);
3879
3880 Node* length = end;
3881 if (_gvn.type(start) != TypeInt::ZERO) {
3882 length = _gvn.transform(new SubINode(end, start));
3883 }
3884
3885 // Bail out if length is negative.
3886 // Without this the new_array would throw
3887 // NegativeArraySizeException but IllegalArgumentException is what
3888 // should be thrown
3889 generate_negative_guard(length, bailout, &length);
3890
3891 if (bailout->req() > 1) {
3892 PreserveJVMState pjvms(this);
3893 set_control(_gvn.transform(bailout));
3894 uncommon_trap(Deoptimization::Reason_intrinsic,
3895 Deoptimization::Action_maybe_recompile);
3896 }
3897
3898 if (!stopped()) {
3899 // How many elements will we copy from the original?
3900 // The answer is MinI(orig_length - start, length).
3901 Node* orig_tail = _gvn.transform(new SubINode(orig_length, start));
3902 Node* moved = generate_min_max(vmIntrinsics::_min, orig_tail, length);
3903
3904 newcopy = new_array(klass_node, length, 0); // no arguments to push
3905
3906 // Generate a direct call to the right arraycopy function(s).
3907 // We know the copy is disjoint but we might not know if the
3908 // oop stores need checking.
3909 // Extreme case: Arrays.copyOf((Integer[])x, 10, String[].class).
3910 // This will fail a store-check if x contains any non-nulls.
3911
3912 Node* alloc = tightly_coupled_allocation(newcopy, NULL);
3913
3914 ArrayCopyNode* ac = ArrayCopyNode::make(this, true, original, start, newcopy, intcon(0), moved, alloc != NULL,
3915 load_object_klass(original), klass_node);
3916 if (!is_copyOfRange) {
3917 ac->set_copyof();
3918 } else {
3919 ac->set_copyofrange();
3920 }
3921 Node* n = _gvn.transform(ac);
3922 assert(n == ac, "cannot disappear");
3923 ac->connect_outputs(this);
3924 }
3925 } // original reexecute is set back here
3926
3927 C->set_has_split_ifs(true); // Has chance for split-if optimization
3928 if (!stopped()) {
3929 set_result(newcopy);
3930 }
3931 return true;
3932 }
3933
3934
3935 //----------------------generate_virtual_guard---------------------------
3936 // Helper for hashCode and clone. Peeks inside the vtable to avoid a call.
3937 Node* LibraryCallKit::generate_virtual_guard(Node* obj_klass,
3938 RegionNode* slow_region) {
3939 ciMethod* method = callee();
3940 int vtable_index = method->vtable_index();
3941 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index,
3942 err_msg_res("bad index %d", vtable_index));
3943 // Get the Method* out of the appropriate vtable entry.
3944 int entry_offset = (InstanceKlass::vtable_start_offset() +
3945 vtable_index*vtableEntry::size()) * wordSize +
3946 vtableEntry::method_offset_in_bytes();
3947 Node* entry_addr = basic_plus_adr(obj_klass, entry_offset);
3948 Node* target_call = make_load(NULL, entry_addr, TypePtr::NOTNULL, T_ADDRESS, MemNode::unordered);
3949
3950 // Compare the target method with the expected method (e.g., Object.hashCode).
3951 const TypePtr* native_call_addr = TypeMetadataPtr::make(method);
3952
3953 Node* native_call = makecon(native_call_addr);
3954 Node* chk_native = _gvn.transform(new CmpPNode(target_call, native_call));
3955 Node* test_native = _gvn.transform(new BoolNode(chk_native, BoolTest::ne));
3956
3957 return generate_slow_guard(test_native, slow_region);
3958 }
3959
3960 //-----------------------generate_method_call----------------------------
3961 // Use generate_method_call to make a slow-call to the real
3962 // method if the fast path fails. An alternative would be to
3963 // use a stub like OptoRuntime::slow_arraycopy_Java.
3964 // This only works for expanding the current library call,
3965 // not another intrinsic. (E.g., don't use this for making an
3966 // arraycopy call inside of the copyOf intrinsic.)
3967 CallJavaNode*
3968 LibraryCallKit::generate_method_call(vmIntrinsics::ID method_id, bool is_virtual, bool is_static) {
3969 // When compiling the intrinsic method itself, do not use this technique.
3970 guarantee(callee() != C->method(), "cannot make slow-call to self");
3971
3972 ciMethod* method = callee();
3973 // ensure the JVMS we have will be correct for this call
3974 guarantee(method_id == method->intrinsic_id(), "must match");
3975
3976 const TypeFunc* tf = TypeFunc::make(method);
3977 CallJavaNode* slow_call;
3978 if (is_static) {
3979 assert(!is_virtual, "");
3980 slow_call = new CallStaticJavaNode(C, tf,
3981 SharedRuntime::get_resolve_static_call_stub(),
3982 method, bci());
3983 } else if (is_virtual) {
3984 null_check_receiver();
3985 int vtable_index = Method::invalid_vtable_index;
3986 if (UseInlineCaches) {
3987 // Suppress the vtable call
3988 } else {
3989 // hashCode and clone are not a miranda methods,
3990 // so the vtable index is fixed.
3991 // No need to use the linkResolver to get it.
3992 vtable_index = method->vtable_index();
3993 assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index,
3994 err_msg_res("bad index %d", vtable_index));
3995 }
3996 slow_call = new CallDynamicJavaNode(tf,
3997 SharedRuntime::get_resolve_virtual_call_stub(),
3998 method, vtable_index, bci());
3999 } else { // neither virtual nor static: opt_virtual
4000 null_check_receiver();
4001 slow_call = new CallStaticJavaNode(C, tf,
4002 SharedRuntime::get_resolve_opt_virtual_call_stub(),
4003 method, bci());
4004 slow_call->set_optimized_virtual(true);
4005 }
4006 set_arguments_for_java_call(slow_call);
4007 set_edges_for_java_call(slow_call);
4008 return slow_call;
4009 }
4010
4011
4012 /**
4013 * Build special case code for calls to hashCode on an object. This call may
4014 * be virtual (invokevirtual) or bound (invokespecial). For each case we generate
4015 * slightly different code.
4016 */
4017 bool LibraryCallKit::inline_native_hashcode(bool is_virtual, bool is_static) {
4018 assert(is_static == callee()->is_static(), "correct intrinsic selection");
4019 assert(!(is_virtual && is_static), "either virtual, special, or static");
4020
4021 enum { _slow_path = 1, _fast_path, _null_path, PATH_LIMIT };
4022
4023 RegionNode* result_reg = new RegionNode(PATH_LIMIT);
4024 PhiNode* result_val = new PhiNode(result_reg, TypeInt::INT);
4025 PhiNode* result_io = new PhiNode(result_reg, Type::ABIO);
4026 PhiNode* result_mem = new PhiNode(result_reg, Type::MEMORY, TypePtr::BOTTOM);
4027 Node* obj = NULL;
4028 if (!is_static) {
4029 // Check for hashing null object
4030 obj = null_check_receiver();
4031 if (stopped()) return true; // unconditionally null
4032 result_reg->init_req(_null_path, top());
4033 result_val->init_req(_null_path, top());
4034 } else {
4035 // Do a null check, and return zero if null.
4036 // System.identityHashCode(null) == 0
4037 obj = argument(0);
4038 Node* null_ctl = top();
4039 obj = null_check_oop(obj, &null_ctl);
4040 result_reg->init_req(_null_path, null_ctl);
4041 result_val->init_req(_null_path, _gvn.intcon(0));
4042 }
4043
4044 // Unconditionally null? Then return right away.
4045 if (stopped()) {
4046 set_control( result_reg->in(_null_path));
4047 if (!stopped())
4048 set_result(result_val->in(_null_path));
4049 return true;
4050 }
4051
4052 // We only go to the fast case code if we pass a number of guards. The
4053 // paths which do not pass are accumulated in the slow_region.
4054 RegionNode* slow_region = new RegionNode(1);
4055 record_for_igvn(slow_region);
4056
4057 // If this is a virtual call, we generate a funny guard. We pull out
4058 // the vtable entry corresponding to hashCode() from the target object.
4059 // If the target method which we are calling happens to be the native
4060 // Object hashCode() method, we pass the guard. We do not need this
4061 // guard for non-virtual calls -- the caller is known to be the native
4062 // Object hashCode().
4063 if (is_virtual) {
4064 // After null check, get the object's klass.
4065 Node* obj_klass = load_object_klass(obj);
4066 generate_virtual_guard(obj_klass, slow_region);
4067 }
4068
4069 // Get the header out of the object, use LoadMarkNode when available
4070 Node* header_addr = basic_plus_adr(obj, oopDesc::mark_offset_in_bytes());
4071 // The control of the load must be NULL. Otherwise, the load can move before
4072 // the null check after castPP removal.
4073 Node* no_ctrl = NULL;
4074 Node* header = make_load(no_ctrl, header_addr, TypeX_X, TypeX_X->basic_type(), MemNode::unordered);
4075
4076 // Test the header to see if it is unlocked.
4077 Node *lock_mask = _gvn.MakeConX(markOopDesc::biased_lock_mask_in_place);
4078 Node *lmasked_header = _gvn.transform(new AndXNode(header, lock_mask));
4079 Node *unlocked_val = _gvn.MakeConX(markOopDesc::unlocked_value);
4080 Node *chk_unlocked = _gvn.transform(new CmpXNode( lmasked_header, unlocked_val));
4081 Node *test_unlocked = _gvn.transform(new BoolNode( chk_unlocked, BoolTest::ne));
4082
4083 generate_slow_guard(test_unlocked, slow_region);
4084
4085 // Get the hash value and check to see that it has been properly assigned.
4086 // We depend on hash_mask being at most 32 bits and avoid the use of
4087 // hash_mask_in_place because it could be larger than 32 bits in a 64-bit
4088 // vm: see markOop.hpp.
4089 Node *hash_mask = _gvn.intcon(markOopDesc::hash_mask);
4090 Node *hash_shift = _gvn.intcon(markOopDesc::hash_shift);
4091 Node *hshifted_header= _gvn.transform(new URShiftXNode(header, hash_shift));
4092 // This hack lets the hash bits live anywhere in the mark object now, as long
4093 // as the shift drops the relevant bits into the low 32 bits. Note that
4094 // Java spec says that HashCode is an int so there's no point in capturing
4095 // an 'X'-sized hashcode (32 in 32-bit build or 64 in 64-bit build).
4096 hshifted_header = ConvX2I(hshifted_header);
4097 Node *hash_val = _gvn.transform(new AndINode(hshifted_header, hash_mask));
4098
4099 Node *no_hash_val = _gvn.intcon(markOopDesc::no_hash);
4100 Node *chk_assigned = _gvn.transform(new CmpINode( hash_val, no_hash_val));
4101 Node *test_assigned = _gvn.transform(new BoolNode( chk_assigned, BoolTest::eq));
4102
4103 generate_slow_guard(test_assigned, slow_region);
4104
4105 Node* init_mem = reset_memory();
4106 // fill in the rest of the null path:
4107 result_io ->init_req(_null_path, i_o());
4108 result_mem->init_req(_null_path, init_mem);
4109
4110 result_val->init_req(_fast_path, hash_val);
4111 result_reg->init_req(_fast_path, control());
4112 result_io ->init_req(_fast_path, i_o());
4113 result_mem->init_req(_fast_path, init_mem);
4114
4115 // Generate code for the slow case. We make a call to hashCode().
4116 set_control(_gvn.transform(slow_region));
4117 if (!stopped()) {
4118 // No need for PreserveJVMState, because we're using up the present state.
4119 set_all_memory(init_mem);
4120 vmIntrinsics::ID hashCode_id = is_static ? vmIntrinsics::_identityHashCode : vmIntrinsics::_hashCode;
4121 CallJavaNode* slow_call = generate_method_call(hashCode_id, is_virtual, is_static);
4122 Node* slow_result = set_results_for_java_call(slow_call);
4123 // this->control() comes from set_results_for_java_call
4124 result_reg->init_req(_slow_path, control());
4125 result_val->init_req(_slow_path, slow_result);
4126 result_io ->set_req(_slow_path, i_o());
4127 result_mem ->set_req(_slow_path, reset_memory());
4128 }
4129
4130 // Return the combined state.
4131 set_i_o( _gvn.transform(result_io) );
4132 set_all_memory( _gvn.transform(result_mem));
4133
4134 set_result(result_reg, result_val);
4135 return true;
4136 }
4137
4138 //---------------------------inline_native_getClass----------------------------
4139 // public final native Class<?> java.lang.Object.getClass();
4140 //
4141 // Build special case code for calls to getClass on an object.
4142 bool LibraryCallKit::inline_native_getClass() {
4143 Node* obj = null_check_receiver();
4144 if (stopped()) return true;
4145 set_result(load_mirror_from_klass(load_object_klass(obj)));
4146 return true;
4147 }
4148
4149 //-----------------inline_native_Reflection_getCallerClass---------------------
4150 // public static native Class<?> sun.reflect.Reflection.getCallerClass();
4151 //
4152 // In the presence of deep enough inlining, getCallerClass() becomes a no-op.
4153 //
4154 // NOTE: This code must perform the same logic as JVM_GetCallerClass
4155 // in that it must skip particular security frames and checks for
4156 // caller sensitive methods.
4157 bool LibraryCallKit::inline_native_Reflection_getCallerClass() {
4158 #ifndef PRODUCT
4159 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) {
4160 tty->print_cr("Attempting to inline sun.reflect.Reflection.getCallerClass");
4161 }
4162 #endif
4163
4164 if (!jvms()->has_method()) {
4165 #ifndef PRODUCT
4166 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) {
4167 tty->print_cr(" Bailing out because intrinsic was inlined at top level");
4168 }
4169 #endif
4170 return false;
4171 }
4172
4173 // Walk back up the JVM state to find the caller at the required
4174 // depth.
4175 JVMState* caller_jvms = jvms();
4176
4177 // Cf. JVM_GetCallerClass
4178 // NOTE: Start the loop at depth 1 because the current JVM state does
4179 // not include the Reflection.getCallerClass() frame.
4180 for (int n = 1; caller_jvms != NULL; caller_jvms = caller_jvms->caller(), n++) {
4181 ciMethod* m = caller_jvms->method();
4182 switch (n) {
4183 case 0:
4184 fatal("current JVM state does not include the Reflection.getCallerClass frame");
4185 break;
4186 case 1:
4187 // Frame 0 and 1 must be caller sensitive (see JVM_GetCallerClass).
4188 if (!m->caller_sensitive()) {
4189 #ifndef PRODUCT
4190 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) {
4191 tty->print_cr(" Bailing out: CallerSensitive annotation expected at frame %d", n);
4192 }
4193 #endif
4194 return false; // bail-out; let JVM_GetCallerClass do the work
4195 }
4196 break;
4197 default:
4198 if (!m->is_ignored_by_security_stack_walk()) {
4199 // We have reached the desired frame; return the holder class.
4200 // Acquire method holder as java.lang.Class and push as constant.
4201 ciInstanceKlass* caller_klass = caller_jvms->method()->holder();
4202 ciInstance* caller_mirror = caller_klass->java_mirror();
4203 set_result(makecon(TypeInstPtr::make(caller_mirror)));
4204
4205 #ifndef PRODUCT
4206 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) {
4207 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());
4208 tty->print_cr(" JVM state at this point:");
4209 for (int i = jvms()->depth(), n = 1; i >= 1; i--, n++) {
4210 ciMethod* m = jvms()->of_depth(i)->method();
4211 tty->print_cr(" %d) %s.%s", n, m->holder()->name()->as_utf8(), m->name()->as_utf8());
4212 }
4213 }
4214 #endif
4215 return true;
4216 }
4217 break;
4218 }
4219 }
4220
4221 #ifndef PRODUCT
4222 if ((C->print_intrinsics() || C->print_inlining()) && Verbose) {
4223 tty->print_cr(" Bailing out because caller depth exceeded inlining depth = %d", jvms()->depth());
4224 tty->print_cr(" JVM state at this point:");
4225 for (int i = jvms()->depth(), n = 1; i >= 1; i--, n++) {
4226 ciMethod* m = jvms()->of_depth(i)->method();
4227 tty->print_cr(" %d) %s.%s", n, m->holder()->name()->as_utf8(), m->name()->as_utf8());
4228 }
4229 }
4230 #endif
4231
4232 return false; // bail-out; let JVM_GetCallerClass do the work
4233 }
4234
4235 bool LibraryCallKit::inline_fp_conversions(vmIntrinsics::ID id) {
4236 Node* arg = argument(0);
4237 Node* result;
4238
4239 switch (id) {
4240 case vmIntrinsics::_floatToRawIntBits: result = new MoveF2INode(arg); break;
4241 case vmIntrinsics::_intBitsToFloat: result = new MoveI2FNode(arg); break;
4242 case vmIntrinsics::_doubleToRawLongBits: result = new MoveD2LNode(arg); break;
4243 case vmIntrinsics::_longBitsToDouble: result = new MoveL2DNode(arg); break;
4244
4245 case vmIntrinsics::_doubleToLongBits: {
4246 // two paths (plus control) merge in a wood
4247 RegionNode *r = new RegionNode(3);
4248 Node *phi = new PhiNode(r, TypeLong::LONG);
4249
4250 Node *cmpisnan = _gvn.transform(new CmpDNode(arg, arg));
4251 // Build the boolean node
4252 Node *bolisnan = _gvn.transform(new BoolNode(cmpisnan, BoolTest::ne));
4253
4254 // Branch either way.
4255 // NaN case is less traveled, which makes all the difference.
4256 IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN);
4257 Node *opt_isnan = _gvn.transform(ifisnan);
4258 assert( opt_isnan->is_If(), "Expect an IfNode");
4259 IfNode *opt_ifisnan = (IfNode*)opt_isnan;
4260 Node *iftrue = _gvn.transform(new IfTrueNode(opt_ifisnan));
4261
4262 set_control(iftrue);
4263
4264 static const jlong nan_bits = CONST64(0x7ff8000000000000);
4265 Node *slow_result = longcon(nan_bits); // return NaN
4266 phi->init_req(1, _gvn.transform( slow_result ));
4267 r->init_req(1, iftrue);
4268
4269 // Else fall through
4270 Node *iffalse = _gvn.transform(new IfFalseNode(opt_ifisnan));
4271 set_control(iffalse);
4272
4273 phi->init_req(2, _gvn.transform(new MoveD2LNode(arg)));
4274 r->init_req(2, iffalse);
4275
4276 // Post merge
4277 set_control(_gvn.transform(r));
4278 record_for_igvn(r);
4279
4280 C->set_has_split_ifs(true); // Has chance for split-if optimization
4281 result = phi;
4282 assert(result->bottom_type()->isa_long(), "must be");
4283 break;
4284 }
4285
4286 case vmIntrinsics::_floatToIntBits: {
4287 // two paths (plus control) merge in a wood
4288 RegionNode *r = new RegionNode(3);
4289 Node *phi = new PhiNode(r, TypeInt::INT);
4290
4291 Node *cmpisnan = _gvn.transform(new CmpFNode(arg, arg));
4292 // Build the boolean node
4293 Node *bolisnan = _gvn.transform(new BoolNode(cmpisnan, BoolTest::ne));
4294
4295 // Branch either way.
4296 // NaN case is less traveled, which makes all the difference.
4297 IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN);
4298 Node *opt_isnan = _gvn.transform(ifisnan);
4299 assert( opt_isnan->is_If(), "Expect an IfNode");
4300 IfNode *opt_ifisnan = (IfNode*)opt_isnan;
4301 Node *iftrue = _gvn.transform(new IfTrueNode(opt_ifisnan));
4302
4303 set_control(iftrue);
4304
4305 static const jint nan_bits = 0x7fc00000;
4306 Node *slow_result = makecon(TypeInt::make(nan_bits)); // return NaN
4307 phi->init_req(1, _gvn.transform( slow_result ));
4308 r->init_req(1, iftrue);
4309
4310 // Else fall through
4311 Node *iffalse = _gvn.transform(new IfFalseNode(opt_ifisnan));
4312 set_control(iffalse);
4313
4314 phi->init_req(2, _gvn.transform(new MoveF2INode(arg)));
4315 r->init_req(2, iffalse);
4316
4317 // Post merge
4318 set_control(_gvn.transform(r));
4319 record_for_igvn(r);
4320
4321 C->set_has_split_ifs(true); // Has chance for split-if optimization
4322 result = phi;
4323 assert(result->bottom_type()->isa_int(), "must be");
4324 break;
4325 }
4326
4327 default:
4328 fatal_unexpected_iid(id);
4329 break;
4330 }
4331 set_result(_gvn.transform(result));
4332 return true;
4333 }
4334
4335 #ifdef _LP64
4336 #define XTOP ,top() /*additional argument*/
4337 #else //_LP64
4338 #define XTOP /*no additional argument*/
4339 #endif //_LP64
4340
4341 //----------------------inline_unsafe_copyMemory-------------------------
4342 // public native void sun.misc.Unsafe.copyMemory(Object srcBase, long srcOffset, Object destBase, long destOffset, long bytes);
4343 bool LibraryCallKit::inline_unsafe_copyMemory() {
4344 if (callee()->is_static()) return false; // caller must have the capability!
4345 null_check_receiver(); // null-check receiver
4346 if (stopped()) return true;
4347
4348 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe".
4349
4350 Node* src_ptr = argument(1); // type: oop
4351 Node* src_off = ConvL2X(argument(2)); // type: long
4352 Node* dst_ptr = argument(4); // type: oop
4353 Node* dst_off = ConvL2X(argument(5)); // type: long
4354 Node* size = ConvL2X(argument(7)); // type: long
4355
4356 assert(Unsafe_field_offset_to_byte_offset(11) == 11,
4357 "fieldOffset must be byte-scaled");
4358
4359 Node* src = make_unsafe_address(src_ptr, src_off);
4360 Node* dst = make_unsafe_address(dst_ptr, dst_off);
4361
4362 // Conservatively insert a memory barrier on all memory slices.
4363 // Do not let writes of the copy source or destination float below the copy.
4364 insert_mem_bar(Op_MemBarCPUOrder);
4365
4366 // Call it. Note that the length argument is not scaled.
4367 make_runtime_call(RC_LEAF|RC_NO_FP,
4368 OptoRuntime::fast_arraycopy_Type(),
4369 StubRoutines::unsafe_arraycopy(),
4370 "unsafe_arraycopy",
4371 TypeRawPtr::BOTTOM,
4372 src, dst, size XTOP);
4373
4374 // Do not let reads of the copy destination float above the copy.
4375 insert_mem_bar(Op_MemBarCPUOrder);
4376
4377 return true;
4378 }
4379
4380 //------------------------clone_coping-----------------------------------
4381 // Helper function for inline_native_clone.
4382 void LibraryCallKit::copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array, bool card_mark) {
4383 assert(obj_size != NULL, "");
4384 Node* raw_obj = alloc_obj->in(1);
4385 assert(alloc_obj->is_CheckCastPP() && raw_obj->is_Proj() && raw_obj->in(0)->is_Allocate(), "");
4386
4387 AllocateNode* alloc = NULL;
4388 if (ReduceBulkZeroing) {
4389 // We will be completely responsible for initializing this object -
4390 // mark Initialize node as complete.
4391 alloc = AllocateNode::Ideal_allocation(alloc_obj, &_gvn);
4392 // The object was just allocated - there should be no any stores!
4393 guarantee(alloc != NULL && alloc->maybe_set_complete(&_gvn), "");
4394 // Mark as complete_with_arraycopy so that on AllocateNode
4395 // expansion, we know this AllocateNode is initialized by an array
4396 // copy and a StoreStore barrier exists after the array copy.
4397 alloc->initialization()->set_complete_with_arraycopy();
4398 }
4399
4400 // Copy the fastest available way.
4401 // TODO: generate fields copies for small objects instead.
4402 Node* src = obj;
4403 Node* dest = alloc_obj;
4404 Node* size = _gvn.transform(obj_size);
4405
4406 // Exclude the header but include array length to copy by 8 bytes words.
4407 // Can't use base_offset_in_bytes(bt) since basic type is unknown.
4408 int base_off = is_array ? arrayOopDesc::length_offset_in_bytes() :
4409 instanceOopDesc::base_offset_in_bytes();
4410 // base_off:
4411 // 8 - 32-bit VM
4412 // 12 - 64-bit VM, compressed klass
4413 // 16 - 64-bit VM, normal klass
4414 if (base_off % BytesPerLong != 0) {
4415 assert(UseCompressedClassPointers, "");
4416 if (is_array) {
4417 // Exclude length to copy by 8 bytes words.
4418 base_off += sizeof(int);
4419 } else {
4420 // Include klass to copy by 8 bytes words.
4421 base_off = instanceOopDesc::klass_offset_in_bytes();
4422 }
4423 assert(base_off % BytesPerLong == 0, "expect 8 bytes alignment");
4424 }
4425 src = basic_plus_adr(src, base_off);
4426 dest = basic_plus_adr(dest, base_off);
4427
4428 // Compute the length also, if needed:
4429 Node* countx = size;
4430 countx = _gvn.transform(new SubXNode(countx, MakeConX(base_off)));
4431 countx = _gvn.transform(new URShiftXNode(countx, intcon(LogBytesPerLong) ));
4432
4433 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM;
4434
4435 ArrayCopyNode* ac = ArrayCopyNode::make(this, false, src, NULL, dest, NULL, countx, false);
4436 ac->set_clonebasic();
4437 Node* n = _gvn.transform(ac);
4438 assert(n == ac, "cannot disappear");
4439 set_predefined_output_for_runtime_call(ac, ac->in(TypeFunc::Memory), raw_adr_type);
4440
4441 // If necessary, emit some card marks afterwards. (Non-arrays only.)
4442 if (card_mark) {
4443 assert(!is_array, "");
4444 // Put in store barrier for any and all oops we are sticking
4445 // into this object. (We could avoid this if we could prove
4446 // that the object type contains no oop fields at all.)
4447 Node* no_particular_value = NULL;
4448 Node* no_particular_field = NULL;
4449 int raw_adr_idx = Compile::AliasIdxRaw;
4450 post_barrier(control(),
4451 memory(raw_adr_type),
4452 alloc_obj,
4453 no_particular_field,
4454 raw_adr_idx,
4455 no_particular_value,
4456 T_OBJECT,
4457 false);
4458 }
4459
4460 // Do not let reads from the cloned object float above the arraycopy.
4461 if (alloc != NULL) {
4462 // Do not let stores that initialize this object be reordered with
4463 // a subsequent store that would make this object accessible by
4464 // other threads.
4465 // Record what AllocateNode this StoreStore protects so that
4466 // escape analysis can go from the MemBarStoreStoreNode to the
4467 // AllocateNode and eliminate the MemBarStoreStoreNode if possible
4468 // based on the escape status of the AllocateNode.
4469 insert_mem_bar(Op_MemBarStoreStore, alloc->proj_out(AllocateNode::RawAddress));
4470 } else {
4471 insert_mem_bar(Op_MemBarCPUOrder);
4472 }
4473 }
4474
4475 //------------------------inline_native_clone----------------------------
4476 // protected native Object java.lang.Object.clone();
4477 //
4478 // Here are the simple edge cases:
4479 // null receiver => normal trap
4480 // virtual and clone was overridden => slow path to out-of-line clone
4481 // not cloneable or finalizer => slow path to out-of-line Object.clone
4482 //
4483 // The general case has two steps, allocation and copying.
4484 // Allocation has two cases, and uses GraphKit::new_instance or new_array.
4485 //
4486 // Copying also has two cases, oop arrays and everything else.
4487 // Oop arrays use arrayof_oop_arraycopy (same as System.arraycopy).
4488 // Everything else uses the tight inline loop supplied by CopyArrayNode.
4489 //
4490 // These steps fold up nicely if and when the cloned object's klass
4491 // can be sharply typed as an object array, a type array, or an instance.
4492 //
4493 bool LibraryCallKit::inline_native_clone(bool is_virtual) {
4494 PhiNode* result_val;
4495
4496 // Set the reexecute bit for the interpreter to reexecute
4497 // the bytecode that invokes Object.clone if deoptimization happens.
4498 { PreserveReexecuteState preexecs(this);
4499 jvms()->set_should_reexecute(true);
4500
4501 Node* obj = null_check_receiver();
4502 if (stopped()) return true;
4503
4504 Node* obj_klass = load_object_klass(obj);
4505 const TypeKlassPtr* tklass = _gvn.type(obj_klass)->isa_klassptr();
4506 const TypeOopPtr* toop = ((tklass != NULL)
4507 ? tklass->as_instance_type()
4508 : TypeInstPtr::NOTNULL);
4509
4510 // Conservatively insert a memory barrier on all memory slices.
4511 // Do not let writes into the original float below the clone.
4512 insert_mem_bar(Op_MemBarCPUOrder);
4513
4514 // paths into result_reg:
4515 enum {
4516 _slow_path = 1, // out-of-line call to clone method (virtual or not)
4517 _objArray_path, // plain array allocation, plus arrayof_oop_arraycopy
4518 _array_path, // plain array allocation, plus arrayof_long_arraycopy
4519 _instance_path, // plain instance allocation, plus arrayof_long_arraycopy
4520 PATH_LIMIT
4521 };
4522 RegionNode* result_reg = new RegionNode(PATH_LIMIT);
4523 result_val = new PhiNode(result_reg, TypeInstPtr::NOTNULL);
4524 PhiNode* result_i_o = new PhiNode(result_reg, Type::ABIO);
4525 PhiNode* result_mem = new PhiNode(result_reg, Type::MEMORY, TypePtr::BOTTOM);
4526 record_for_igvn(result_reg);
4527
4528 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM;
4529 int raw_adr_idx = Compile::AliasIdxRaw;
4530
4531 Node* array_ctl = generate_array_guard(obj_klass, (RegionNode*)NULL);
4532 if (array_ctl != NULL) {
4533 // It's an array.
4534 PreserveJVMState pjvms(this);
4535 set_control(array_ctl);
4536 Node* obj_length = load_array_length(obj);
4537 Node* obj_size = NULL;
4538 Node* alloc_obj = new_array(obj_klass, obj_length, 0, &obj_size); // no arguments to push
4539
4540 if (!use_ReduceInitialCardMarks()) {
4541 // If it is an oop array, it requires very special treatment,
4542 // because card marking is required on each card of the array.
4543 Node* is_obja = generate_objArray_guard(obj_klass, (RegionNode*)NULL);
4544 if (is_obja != NULL) {
4545 PreserveJVMState pjvms2(this);
4546 set_control(is_obja);
4547 // Generate a direct call to the right arraycopy function(s).
4548 Node* alloc = tightly_coupled_allocation(alloc_obj, NULL);
4549 ArrayCopyNode* ac = ArrayCopyNode::make(this, true, obj, intcon(0), alloc_obj, intcon(0), obj_length, alloc != NULL);
4550 ac->set_cloneoop();
4551 Node* n = _gvn.transform(ac);
4552 assert(n == ac, "cannot disappear");
4553 ac->connect_outputs(this);
4554
4555 result_reg->init_req(_objArray_path, control());
4556 result_val->init_req(_objArray_path, alloc_obj);
4557 result_i_o ->set_req(_objArray_path, i_o());
4558 result_mem ->set_req(_objArray_path, reset_memory());
4559 }
4560 }
4561 // Otherwise, there are no card marks to worry about.
4562 // (We can dispense with card marks if we know the allocation
4563 // comes out of eden (TLAB)... In fact, ReduceInitialCardMarks
4564 // causes the non-eden paths to take compensating steps to
4565 // simulate a fresh allocation, so that no further
4566 // card marks are required in compiled code to initialize
4567 // the object.)
4568
4569 if (!stopped()) {
4570 copy_to_clone(obj, alloc_obj, obj_size, true, false);
4571
4572 // Present the results of the copy.
4573 result_reg->init_req(_array_path, control());
4574 result_val->init_req(_array_path, alloc_obj);
4575 result_i_o ->set_req(_array_path, i_o());
4576 result_mem ->set_req(_array_path, reset_memory());
4577 }
4578 }
4579
4580 // We only go to the instance fast case code if we pass a number of guards.
4581 // The paths which do not pass are accumulated in the slow_region.
4582 RegionNode* slow_region = new RegionNode(1);
4583 record_for_igvn(slow_region);
4584 if (!stopped()) {
4585 // It's an instance (we did array above). Make the slow-path tests.
4586 // If this is a virtual call, we generate a funny guard. We grab
4587 // the vtable entry corresponding to clone() from the target object.
4588 // If the target method which we are calling happens to be the
4589 // Object clone() method, we pass the guard. We do not need this
4590 // guard for non-virtual calls; the caller is known to be the native
4591 // Object clone().
4592 if (is_virtual) {
4593 generate_virtual_guard(obj_klass, slow_region);
4594 }
4595
4596 // The object must be cloneable and must not have a finalizer.
4597 // Both of these conditions may be checked in a single test.
4598 // We could optimize the cloneable test further, but we don't care.
4599 generate_access_flags_guard(obj_klass,
4600 // Test both conditions:
4601 JVM_ACC_IS_CLONEABLE | JVM_ACC_HAS_FINALIZER,
4602 // Must be cloneable but not finalizer:
4603 JVM_ACC_IS_CLONEABLE,
4604 slow_region);
4605 }
4606
4607 if (!stopped()) {
4608 // It's an instance, and it passed the slow-path tests.
4609 PreserveJVMState pjvms(this);
4610 Node* obj_size = NULL;
4611 // Need to deoptimize on exception from allocation since Object.clone intrinsic
4612 // is reexecuted if deoptimization occurs and there could be problems when merging
4613 // exception state between multiple Object.clone versions (reexecute=true vs reexecute=false).
4614 Node* alloc_obj = new_instance(obj_klass, NULL, &obj_size, /*deoptimize_on_exception=*/true);
4615
4616 copy_to_clone(obj, alloc_obj, obj_size, false, !use_ReduceInitialCardMarks());
4617
4618 // Present the results of the slow call.
4619 result_reg->init_req(_instance_path, control());
4620 result_val->init_req(_instance_path, alloc_obj);
4621 result_i_o ->set_req(_instance_path, i_o());
4622 result_mem ->set_req(_instance_path, reset_memory());
4623 }
4624
4625 // Generate code for the slow case. We make a call to clone().
4626 set_control(_gvn.transform(slow_region));
4627 if (!stopped()) {
4628 PreserveJVMState pjvms(this);
4629 CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_clone, is_virtual);
4630 Node* slow_result = set_results_for_java_call(slow_call);
4631 // this->control() comes from set_results_for_java_call
4632 result_reg->init_req(_slow_path, control());
4633 result_val->init_req(_slow_path, slow_result);
4634 result_i_o ->set_req(_slow_path, i_o());
4635 result_mem ->set_req(_slow_path, reset_memory());
4636 }
4637
4638 // Return the combined state.
4639 set_control( _gvn.transform(result_reg));
4640 set_i_o( _gvn.transform(result_i_o));
4641 set_all_memory( _gvn.transform(result_mem));
4642 } // original reexecute is set back here
4643
4644 set_result(_gvn.transform(result_val));
4645 return true;
4646 }
4647
4648 //------------------------------inline_arraycopy-----------------------
4649 // public static native void java.lang.System.arraycopy(Object src, int srcPos,
4650 // Object dest, int destPos,
4651 // int length);
4652 bool LibraryCallKit::inline_arraycopy() {
4653 // Get the arguments.
4654 Node* src = argument(0); // type: oop
4655 Node* src_offset = argument(1); // type: int
4656 Node* dest = argument(2); // type: oop
4657 Node* dest_offset = argument(3); // type: int
4658 Node* length = argument(4); // type: int
4659
4660 // The following tests must be performed
4661 // (1) src and dest are arrays.
4662 // (2) src and dest arrays must have elements of the same BasicType
4663 // (3) src and dest must not be null.
4664 // (4) src_offset must not be negative.
4665 // (5) dest_offset must not be negative.
4666 // (6) length must not be negative.
4667 // (7) src_offset + length must not exceed length of src.
4668 // (8) dest_offset + length must not exceed length of dest.
4669 // (9) each element of an oop array must be assignable
4670
4671 // (3) src and dest must not be null.
4672 // always do this here because we need the JVM state for uncommon traps
4673 src = null_check(src, T_ARRAY);
4674 dest = null_check(dest, T_ARRAY);
4675
4676 bool notest = false;
4677
4678 const Type* src_type = _gvn.type(src);
4679 const Type* dest_type = _gvn.type(dest);
4680 const TypeAryPtr* top_src = src_type->isa_aryptr();
4681 const TypeAryPtr* top_dest = dest_type->isa_aryptr();
4682
4683 // Do we have the type of src?
4684 bool has_src = (top_src != NULL && top_src->klass() != NULL);
4685 // Do we have the type of dest?
4686 bool has_dest = (top_dest != NULL && top_dest->klass() != NULL);
4687 // Is the type for src from speculation?
4688 bool src_spec = false;
4689 // Is the type for dest from speculation?
4690 bool dest_spec = false;
4691
4692 if (!has_src || !has_dest) {
4693 // We don't have sufficient type information, let's see if
4694 // speculative types can help. We need to have types for both src
4695 // and dest so that it pays off.
4696
4697 // Do we already have or could we have type information for src
4698 bool could_have_src = has_src;
4699 // Do we already have or could we have type information for dest
4700 bool could_have_dest = has_dest;
4701
4702 ciKlass* src_k = NULL;
4703 if (!has_src) {
4704 src_k = src_type->speculative_type_not_null();
4705 if (src_k != NULL && src_k->is_array_klass()) {
4706 could_have_src = true;
4707 }
4708 }
4709
4710 ciKlass* dest_k = NULL;
4711 if (!has_dest) {
4712 dest_k = dest_type->speculative_type_not_null();
4713 if (dest_k != NULL && dest_k->is_array_klass()) {
4714 could_have_dest = true;
4715 }
4716 }
4717
4718 if (could_have_src && could_have_dest) {
4719 // This is going to pay off so emit the required guards
4720 if (!has_src) {
4721 src = maybe_cast_profiled_obj(src, src_k);
4722 src_type = _gvn.type(src);
4723 top_src = src_type->isa_aryptr();
4724 has_src = (top_src != NULL && top_src->klass() != NULL);
4725 src_spec = true;
4726 }
4727 if (!has_dest) {
4728 dest = maybe_cast_profiled_obj(dest, dest_k);
4729 dest_type = _gvn.type(dest);
4730 top_dest = dest_type->isa_aryptr();
4731 has_dest = (top_dest != NULL && top_dest->klass() != NULL);
4732 dest_spec = true;
4733 }
4734 }
4735 }
4736
4737 if (has_src && has_dest) {
4738 BasicType src_elem = top_src->klass()->as_array_klass()->element_type()->basic_type();
4739 BasicType dest_elem = top_dest->klass()->as_array_klass()->element_type()->basic_type();
4740 if (src_elem == T_ARRAY) src_elem = T_OBJECT;
4741 if (dest_elem == T_ARRAY) dest_elem = T_OBJECT;
4742
4743 if (src_elem == dest_elem && src_elem == T_OBJECT) {
4744 // If both arrays are object arrays then having the exact types
4745 // for both will remove the need for a subtype check at runtime
4746 // before the call and may make it possible to pick a faster copy
4747 // routine (without a subtype check on every element)
4748 // Do we have the exact type of src?
4749 bool could_have_src = src_spec;
4750 // Do we have the exact type of dest?
4751 bool could_have_dest = dest_spec;
4752 ciKlass* src_k = top_src->klass();
4753 ciKlass* dest_k = top_dest->klass();
4754 if (!src_spec) {
4755 src_k = src_type->speculative_type_not_null();
4756 if (src_k != NULL && src_k->is_array_klass()) {
4757 could_have_src = true;
4758 }
4759 }
4760 if (!dest_spec) {
4761 dest_k = dest_type->speculative_type_not_null();
4762 if (dest_k != NULL && dest_k->is_array_klass()) {
4763 could_have_dest = true;
4764 }
4765 }
4766 if (could_have_src && could_have_dest) {
4767 // If we can have both exact types, emit the missing guards
4768 if (could_have_src && !src_spec) {
4769 src = maybe_cast_profiled_obj(src, src_k);
4770 }
4771 if (could_have_dest && !dest_spec) {
4772 dest = maybe_cast_profiled_obj(dest, dest_k);
4773 }
4774 }
4775 }
4776 }
4777
4778 if (!too_many_traps(Deoptimization::Reason_intrinsic) && !src->is_top() && !dest->is_top()) {
4779 // validate arguments: enables transformation the ArrayCopyNode
4780 notest = true;
4781
4782 RegionNode* slow_region = new RegionNode(1);
4783 record_for_igvn(slow_region);
4784
4785 // (1) src and dest are arrays.
4786 generate_non_array_guard(load_object_klass(src), slow_region);
4787 generate_non_array_guard(load_object_klass(dest), slow_region);
4788
4789 // (2) src and dest arrays must have elements of the same BasicType
4790 // done at macro expansion or at Ideal transformation time
4791
4792 // (4) src_offset must not be negative.
4793 generate_negative_guard(src_offset, slow_region);
4794
4795 // (5) dest_offset must not be negative.
4796 generate_negative_guard(dest_offset, slow_region);
4797
4798 // (7) src_offset + length must not exceed length of src.
4799 generate_limit_guard(src_offset, length,
4800 load_array_length(src),
4801 slow_region);
4802
4803 // (8) dest_offset + length must not exceed length of dest.
4804 generate_limit_guard(dest_offset, length,
4805 load_array_length(dest),
4806 slow_region);
4807
4808 // (9) each element of an oop array must be assignable
4809 Node* src_klass = load_object_klass(src);
4810 Node* dest_klass = load_object_klass(dest);
4811 Node* not_subtype_ctrl = gen_subtype_check(src_klass, dest_klass);
4812
4813 if (not_subtype_ctrl != top()) {
4814 PreserveJVMState pjvms(this);
4815 set_control(not_subtype_ctrl);
4816 uncommon_trap(Deoptimization::Reason_intrinsic,
4817 Deoptimization::Action_make_not_entrant);
4818 assert(stopped(), "Should be stopped");
4819 }
4820 {
4821 PreserveJVMState pjvms(this);
4822 set_control(_gvn.transform(slow_region));
4823 uncommon_trap(Deoptimization::Reason_intrinsic,
4824 Deoptimization::Action_make_not_entrant);
4825 assert(stopped(), "Should be stopped");
4826 }
4827 }
4828
4829 if (stopped()) {
4830 return true;
4831 }
4832
4833 AllocateArrayNode* alloc = tightly_coupled_allocation(dest, NULL);
4834 ArrayCopyNode* ac = ArrayCopyNode::make(this, true, src, src_offset, dest, dest_offset, length, alloc != NULL,
4835 // Create LoadRange and LoadKlass nodes for use during macro expansion here
4836 // so the compiler has a chance to eliminate them: during macro expansion,
4837 // we have to set their control (CastPP nodes are eliminated).
4838 load_object_klass(src), load_object_klass(dest),
4839 load_array_length(src), load_array_length(dest));
4840
4841 if (notest) {
4842 ac->set_arraycopy_notest();
4843 }
4844
4845 Node* n = _gvn.transform(ac);
4846 assert(n == ac, "cannot disappear");
4847 ac->connect_outputs(this);
4848
4849 return true;
4850 }
4851
4852
4853 // Helper function which determines if an arraycopy immediately follows
4854 // an allocation, with no intervening tests or other escapes for the object.
4855 AllocateArrayNode*
4856 LibraryCallKit::tightly_coupled_allocation(Node* ptr,
4857 RegionNode* slow_region) {
4858 if (stopped()) return NULL; // no fast path
4859 if (C->AliasLevel() == 0) return NULL; // no MergeMems around
4860
4861 AllocateArrayNode* alloc = AllocateArrayNode::Ideal_array_allocation(ptr, &_gvn);
4862 if (alloc == NULL) return NULL;
4863
4864 Node* rawmem = memory(Compile::AliasIdxRaw);
4865 // Is the allocation's memory state untouched?
4866 if (!(rawmem->is_Proj() && rawmem->in(0)->is_Initialize())) {
4867 // Bail out if there have been raw-memory effects since the allocation.
4868 // (Example: There might have been a call or safepoint.)
4869 return NULL;
4870 }
4871 rawmem = rawmem->in(0)->as_Initialize()->memory(Compile::AliasIdxRaw);
4872 if (!(rawmem->is_Proj() && rawmem->in(0) == alloc)) {
4873 return NULL;
4874 }
4875
4876 // There must be no unexpected observers of this allocation.
4877 for (DUIterator_Fast imax, i = ptr->fast_outs(imax); i < imax; i++) {
4878 Node* obs = ptr->fast_out(i);
4879 if (obs != this->map()) {
4880 return NULL;
4881 }
4882 }
4883
4884 // This arraycopy must unconditionally follow the allocation of the ptr.
4885 Node* alloc_ctl = ptr->in(0);
4886 assert(just_allocated_object(alloc_ctl) == ptr, "most recent allo");
4887
4888 Node* ctl = control();
4889 while (ctl != alloc_ctl) {
4890 // There may be guards which feed into the slow_region.
4891 // Any other control flow means that we might not get a chance
4892 // to finish initializing the allocated object.
4893 if ((ctl->is_IfFalse() || ctl->is_IfTrue()) && ctl->in(0)->is_If()) {
4894 IfNode* iff = ctl->in(0)->as_If();
4895 Node* not_ctl = iff->proj_out(1 - ctl->as_Proj()->_con);
4896 assert(not_ctl != NULL && not_ctl != ctl, "found alternate");
4897 if (slow_region != NULL && slow_region->find_edge(not_ctl) >= 1) {
4898 ctl = iff->in(0); // This test feeds the known slow_region.
4899 continue;
4900 }
4901 // One more try: Various low-level checks bottom out in
4902 // uncommon traps. If the debug-info of the trap omits
4903 // any reference to the allocation, as we've already
4904 // observed, then there can be no objection to the trap.
4905 bool found_trap = false;
4906 for (DUIterator_Fast jmax, j = not_ctl->fast_outs(jmax); j < jmax; j++) {
4907 Node* obs = not_ctl->fast_out(j);
4908 if (obs->in(0) == not_ctl && obs->is_Call() &&
4909 (obs->as_Call()->entry_point() == SharedRuntime::uncommon_trap_blob()->entry_point())) {
4910 found_trap = true; break;
4911 }
4912 }
4913 if (found_trap) {
4914 ctl = iff->in(0); // This test feeds a harmless uncommon trap.
4915 continue;
4916 }
4917 }
4918 return NULL;
4919 }
4920
4921 // If we get this far, we have an allocation which immediately
4922 // precedes the arraycopy, and we can take over zeroing the new object.
4923 // The arraycopy will finish the initialization, and provide
4924 // a new control state to which we will anchor the destination pointer.
4925
4926 return alloc;
4927 }
4928
4929 //-------------inline_encodeISOArray-----------------------------------
4930 // encode char[] to byte[] in ISO_8859_1
4931 bool LibraryCallKit::inline_encodeISOArray() {
4932 assert(callee()->signature()->size() == 5, "encodeISOArray has 5 parameters");
4933 // no receiver since it is static method
4934 Node *src = argument(0);
4935 Node *src_offset = argument(1);
4936 Node *dst = argument(2);
4937 Node *dst_offset = argument(3);
4938 Node *length = argument(4);
4939
4940 const Type* src_type = src->Value(&_gvn);
4941 const Type* dst_type = dst->Value(&_gvn);
4942 const TypeAryPtr* top_src = src_type->isa_aryptr();
4943 const TypeAryPtr* top_dest = dst_type->isa_aryptr();
4944 if (top_src == NULL || top_src->klass() == NULL ||
4945 top_dest == NULL || top_dest->klass() == NULL) {
4946 // failed array check
4947 return false;
4948 }
4949
4950 // Figure out the size and type of the elements we will be copying.
4951 BasicType src_elem = src_type->isa_aryptr()->klass()->as_array_klass()->element_type()->basic_type();
4952 BasicType dst_elem = dst_type->isa_aryptr()->klass()->as_array_klass()->element_type()->basic_type();
4953 if (src_elem != T_CHAR || dst_elem != T_BYTE) {
4954 return false;
4955 }
4956 Node* src_start = array_element_address(src, src_offset, src_elem);
4957 Node* dst_start = array_element_address(dst, dst_offset, dst_elem);
4958 // 'src_start' points to src array + scaled offset
4959 // 'dst_start' points to dst array + scaled offset
4960
4961 const TypeAryPtr* mtype = TypeAryPtr::BYTES;
4962 Node* enc = new EncodeISOArrayNode(control(), memory(mtype), src_start, dst_start, length);
4963 enc = _gvn.transform(enc);
4964 Node* res_mem = _gvn.transform(new SCMemProjNode(enc));
4965 set_memory(res_mem, mtype);
4966 set_result(enc);
4967 return true;
4968 }
4969
4970 //-------------inline_multiplyToLen-----------------------------------
4971 bool LibraryCallKit::inline_multiplyToLen() {
4972 assert(UseMultiplyToLenIntrinsic, "not implementated on this platform");
4973
4974 address stubAddr = StubRoutines::multiplyToLen();
4975 if (stubAddr == NULL) {
4976 return false; // Intrinsic's stub is not implemented on this platform
4977 }
4978 const char* stubName = "multiplyToLen";
4979
4980 assert(callee()->signature()->size() == 5, "multiplyToLen has 5 parameters");
4981
4982 Node* x = argument(1);
4983 Node* xlen = argument(2);
4984 Node* y = argument(3);
4985 Node* ylen = argument(4);
4986 Node* z = argument(5);
4987
4988 const Type* x_type = x->Value(&_gvn);
4989 const Type* y_type = y->Value(&_gvn);
4990 const TypeAryPtr* top_x = x_type->isa_aryptr();
4991 const TypeAryPtr* top_y = y_type->isa_aryptr();
4992 if (top_x == NULL || top_x->klass() == NULL ||
4993 top_y == NULL || top_y->klass() == NULL) {
4994 // failed array check
4995 return false;
4996 }
4997
4998 BasicType x_elem = x_type->isa_aryptr()->klass()->as_array_klass()->element_type()->basic_type();
4999 BasicType y_elem = y_type->isa_aryptr()->klass()->as_array_klass()->element_type()->basic_type();
5000 if (x_elem != T_INT || y_elem != T_INT) {
5001 return false;
5002 }
5003
5004 // Set the original stack and the reexecute bit for the interpreter to reexecute
5005 // the bytecode that invokes BigInteger.multiplyToLen() if deoptimization happens
5006 // on the return from z array allocation in runtime.
5007 { PreserveReexecuteState preexecs(this);
5008 jvms()->set_should_reexecute(true);
5009
5010 Node* x_start = array_element_address(x, intcon(0), x_elem);
5011 Node* y_start = array_element_address(y, intcon(0), y_elem);
5012 // 'x_start' points to x array + scaled xlen
5013 // 'y_start' points to y array + scaled ylen
5014
5015 // Allocate the result array
5016 Node* zlen = _gvn.transform(new AddINode(xlen, ylen));
5017 ciKlass* klass = ciTypeArrayKlass::make(T_INT);
5018 Node* klass_node = makecon(TypeKlassPtr::make(klass));
5019
5020 IdealKit ideal(this);
5021
5022 #define __ ideal.
5023 Node* one = __ ConI(1);
5024 Node* zero = __ ConI(0);
5025 IdealVariable need_alloc(ideal), z_alloc(ideal); __ declarations_done();
5026 __ set(need_alloc, zero);
5027 __ set(z_alloc, z);
5028 __ if_then(z, BoolTest::eq, null()); {
5029 __ increment (need_alloc, one);
5030 } __ else_(); {
5031 // Update graphKit memory and control from IdealKit.
5032 sync_kit(ideal);
5033 Node* zlen_arg = load_array_length(z);
5034 // Update IdealKit memory and control from graphKit.
5035 __ sync_kit(this);
5036 __ if_then(zlen_arg, BoolTest::lt, zlen); {
5037 __ increment (need_alloc, one);
5038 } __ end_if();
5039 } __ end_if();
5040
5041 __ if_then(__ value(need_alloc), BoolTest::ne, zero); {
5042 // Update graphKit memory and control from IdealKit.
5043 sync_kit(ideal);
5044 Node * narr = new_array(klass_node, zlen, 1);
5045 // Update IdealKit memory and control from graphKit.
5046 __ sync_kit(this);
5047 __ set(z_alloc, narr);
5048 } __ end_if();
5049
5050 sync_kit(ideal);
5051 z = __ value(z_alloc);
5052 // Can't use TypeAryPtr::INTS which uses Bottom offset.
5053 _gvn.set_type(z, TypeOopPtr::make_from_klass(klass));
5054 // Final sync IdealKit and GraphKit.
5055 final_sync(ideal);
5056 #undef __
5057
5058 Node* z_start = array_element_address(z, intcon(0), T_INT);
5059
5060 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP,
5061 OptoRuntime::multiplyToLen_Type(),
5062 stubAddr, stubName, TypePtr::BOTTOM,
5063 x_start, xlen, y_start, ylen, z_start, zlen);
5064 } // original reexecute is set back here
5065
5066 C->set_has_split_ifs(true); // Has chance for split-if optimization
5067 set_result(z);
5068 return true;
5069 }
5070
5071
5072 /**
5073 * Calculate CRC32 for byte.
5074 * int java.util.zip.CRC32.update(int crc, int b)
5075 */
5076 bool LibraryCallKit::inline_updateCRC32() {
5077 assert(UseCRC32Intrinsics, "need AVX and LCMUL instructions support");
5078 assert(callee()->signature()->size() == 2, "update has 2 parameters");
5079 // no receiver since it is static method
5080 Node* crc = argument(0); // type: int
5081 Node* b = argument(1); // type: int
5082
5083 /*
5084 * int c = ~ crc;
5085 * b = timesXtoThe32[(b ^ c) & 0xFF];
5086 * b = b ^ (c >>> 8);
5087 * crc = ~b;
5088 */
5089
5090 Node* M1 = intcon(-1);
5091 crc = _gvn.transform(new XorINode(crc, M1));
5092 Node* result = _gvn.transform(new XorINode(crc, b));
5093 result = _gvn.transform(new AndINode(result, intcon(0xFF)));
5094
5095 Node* base = makecon(TypeRawPtr::make(StubRoutines::crc_table_addr()));
5096 Node* offset = _gvn.transform(new LShiftINode(result, intcon(0x2)));
5097 Node* adr = basic_plus_adr(top(), base, ConvI2X(offset));
5098 result = make_load(control(), adr, TypeInt::INT, T_INT, MemNode::unordered);
5099
5100 crc = _gvn.transform(new URShiftINode(crc, intcon(8)));
5101 result = _gvn.transform(new XorINode(crc, result));
5102 result = _gvn.transform(new XorINode(result, M1));
5103 set_result(result);
5104 return true;
5105 }
5106
5107 /**
5108 * Calculate CRC32 for byte[] array.
5109 * int java.util.zip.CRC32.updateBytes(int crc, byte[] buf, int off, int len)
5110 */
5111 bool LibraryCallKit::inline_updateBytesCRC32() {
5112 assert(UseCRC32Intrinsics, "need AVX and LCMUL instructions support");
5113 assert(callee()->signature()->size() == 4, "updateBytes has 4 parameters");
5114 // no receiver since it is static method
5115 Node* crc = argument(0); // type: int
5116 Node* src = argument(1); // type: oop
5117 Node* offset = argument(2); // type: int
5118 Node* length = argument(3); // type: int
5119
5120 const Type* src_type = src->Value(&_gvn);
5121 const TypeAryPtr* top_src = src_type->isa_aryptr();
5122 if (top_src == NULL || top_src->klass() == NULL) {
5123 // failed array check
5124 return false;
5125 }
5126
5127 // Figure out the size and type of the elements we will be copying.
5128 BasicType src_elem = src_type->isa_aryptr()->klass()->as_array_klass()->element_type()->basic_type();
5129 if (src_elem != T_BYTE) {
5130 return false;
5131 }
5132
5133 // 'src_start' points to src array + scaled offset
5134 Node* src_start = array_element_address(src, offset, src_elem);
5135
5136 // We assume that range check is done by caller.
5137 // TODO: generate range check (offset+length < src.length) in debug VM.
5138
5139 // Call the stub.
5140 address stubAddr = StubRoutines::updateBytesCRC32();
5141 const char *stubName = "updateBytesCRC32";
5142
5143 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, OptoRuntime::updateBytesCRC32_Type(),
5144 stubAddr, stubName, TypePtr::BOTTOM,
5145 crc, src_start, length);
5146 Node* result = _gvn.transform(new ProjNode(call, TypeFunc::Parms));
5147 set_result(result);
5148 return true;
5149 }
5150
5151 /**
5152 * Calculate CRC32 for ByteBuffer.
5153 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
5154 */
5155 bool LibraryCallKit::inline_updateByteBufferCRC32() {
5156 assert(UseCRC32Intrinsics, "need AVX and LCMUL instructions support");
5157 assert(callee()->signature()->size() == 5, "updateByteBuffer has 4 parameters and one is long");
5158 // no receiver since it is static method
5159 Node* crc = argument(0); // type: int
5160 Node* src = argument(1); // type: long
5161 Node* offset = argument(3); // type: int
5162 Node* length = argument(4); // type: int
5163
5164 src = ConvL2X(src); // adjust Java long to machine word
5165 Node* base = _gvn.transform(new CastX2PNode(src));
5166 offset = ConvI2X(offset);
5167
5168 // 'src_start' points to src array + scaled offset
5169 Node* src_start = basic_plus_adr(top(), base, offset);
5170
5171 // Call the stub.
5172 address stubAddr = StubRoutines::updateBytesCRC32();
5173 const char *stubName = "updateBytesCRC32";
5174
5175 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, OptoRuntime::updateBytesCRC32_Type(),
5176 stubAddr, stubName, TypePtr::BOTTOM,
5177 crc, src_start, length);
5178 Node* result = _gvn.transform(new ProjNode(call, TypeFunc::Parms));
5179 set_result(result);
5180 return true;
5181 }
5182
5183 //----------------------------inline_reference_get----------------------------
5184 // public T java.lang.ref.Reference.get();
5185 bool LibraryCallKit::inline_reference_get() {
5186 const int referent_offset = java_lang_ref_Reference::referent_offset;
5187 guarantee(referent_offset > 0, "should have already been set");
5188
5189 // Get the argument:
5190 Node* reference_obj = null_check_receiver();
5191 if (stopped()) return true;
5192
5193 Node* adr = basic_plus_adr(reference_obj, reference_obj, referent_offset);
5194
5195 ciInstanceKlass* klass = env()->Object_klass();
5196 const TypeOopPtr* object_type = TypeOopPtr::make_from_klass(klass);
5197
5198 Node* no_ctrl = NULL;
5199 Node* result = make_load(no_ctrl, adr, object_type, T_OBJECT, MemNode::unordered);
5200
5201 // Use the pre-barrier to record the value in the referent field
5202 pre_barrier(false /* do_load */,
5203 control(),
5204 NULL /* obj */, NULL /* adr */, max_juint /* alias_idx */, NULL /* val */, NULL /* val_type */,
5205 result /* pre_val */,
5206 T_OBJECT);
5207
5208 // Add memory barrier to prevent commoning reads from this field
5209 // across safepoint since GC can change its value.
5210 insert_mem_bar(Op_MemBarCPUOrder);
5211
5212 set_result(result);
5213 return true;
5214 }
5215
5216
5217 Node * LibraryCallKit::load_field_from_object(Node * fromObj, const char * fieldName, const char * fieldTypeString,
5218 bool is_exact=true, bool is_static=false) {
5219
5220 const TypeInstPtr* tinst = _gvn.type(fromObj)->isa_instptr();
5221 assert(tinst != NULL, "obj is null");
5222 assert(tinst->klass()->is_loaded(), "obj is not loaded");
5223 assert(!is_exact || tinst->klass_is_exact(), "klass not exact");
5224
5225 ciField* field = tinst->klass()->as_instance_klass()->get_field_by_name(ciSymbol::make(fieldName),
5226 ciSymbol::make(fieldTypeString),
5227 is_static);
5228 if (field == NULL) return (Node *) NULL;
5229 assert (field != NULL, "undefined field");
5230
5231 // Next code copied from Parse::do_get_xxx():
5232
5233 // Compute address and memory type.
5234 int offset = field->offset_in_bytes();
5235 bool is_vol = field->is_volatile();
5236 ciType* field_klass = field->type();
5237 assert(field_klass->is_loaded(), "should be loaded");
5238 const TypePtr* adr_type = C->alias_type(field)->adr_type();
5239 Node *adr = basic_plus_adr(fromObj, fromObj, offset);
5240 BasicType bt = field->layout_type();
5241
5242 // Build the resultant type of the load
5243 const Type *type;
5244 if (bt == T_OBJECT) {
5245 type = TypeOopPtr::make_from_klass(field_klass->as_klass());
5246 } else {
5247 type = Type::get_const_basic_type(bt);
5248 }
5249
5250 if (support_IRIW_for_not_multiple_copy_atomic_cpu && is_vol) {
5251 insert_mem_bar(Op_MemBarVolatile); // StoreLoad barrier
5252 }
5253 // Build the load.
5254 MemNode::MemOrd mo = is_vol ? MemNode::acquire : MemNode::unordered;
5255 Node* loadedField = make_load(NULL, adr, type, bt, adr_type, mo, is_vol);
5256 // If reference is volatile, prevent following memory ops from
5257 // floating up past the volatile read. Also prevents commoning
5258 // another volatile read.
5259 if (is_vol) {
5260 // Memory barrier includes bogus read of value to force load BEFORE membar
5261 insert_mem_bar(Op_MemBarAcquire, loadedField);
5262 }
5263 return loadedField;
5264 }
5265
5266
5267 //------------------------------inline_aescrypt_Block-----------------------
5268 bool LibraryCallKit::inline_aescrypt_Block(vmIntrinsics::ID id) {
5269 address stubAddr;
5270 const char *stubName;
5271 assert(UseAES, "need AES instruction support");
5272
5273 switch(id) {
5274 case vmIntrinsics::_aescrypt_encryptBlock:
5275 stubAddr = StubRoutines::aescrypt_encryptBlock();
5276 stubName = "aescrypt_encryptBlock";
5277 break;
5278 case vmIntrinsics::_aescrypt_decryptBlock:
5279 stubAddr = StubRoutines::aescrypt_decryptBlock();
5280 stubName = "aescrypt_decryptBlock";
5281 break;
5282 }
5283 if (stubAddr == NULL) return false;
5284
5285 Node* aescrypt_object = argument(0);
5286 Node* src = argument(1);
5287 Node* src_offset = argument(2);
5288 Node* dest = argument(3);
5289 Node* dest_offset = argument(4);
5290
5291 // (1) src and dest are arrays.
5292 const Type* src_type = src->Value(&_gvn);
5293 const Type* dest_type = dest->Value(&_gvn);
5294 const TypeAryPtr* top_src = src_type->isa_aryptr();
5295 const TypeAryPtr* top_dest = dest_type->isa_aryptr();
5296 assert (top_src != NULL && top_src->klass() != NULL && top_dest != NULL && top_dest->klass() != NULL, "args are strange");
5297
5298 // for the quick and dirty code we will skip all the checks.
5299 // we are just trying to get the call to be generated.
5300 Node* src_start = src;
5301 Node* dest_start = dest;
5302 if (src_offset != NULL || dest_offset != NULL) {
5303 assert(src_offset != NULL && dest_offset != NULL, "");
5304 src_start = array_element_address(src, src_offset, T_BYTE);
5305 dest_start = array_element_address(dest, dest_offset, T_BYTE);
5306 }
5307
5308 // now need to get the start of its expanded key array
5309 // this requires a newer class file that has this array as littleEndian ints, otherwise we revert to java
5310 Node* k_start = get_key_start_from_aescrypt_object(aescrypt_object);
5311 if (k_start == NULL) return false;
5312
5313 if (Matcher::pass_original_key_for_aes()) {
5314 // on SPARC we need to pass the original key since key expansion needs to happen in intrinsics due to
5315 // compatibility issues between Java key expansion and SPARC crypto instructions
5316 Node* original_k_start = get_original_key_start_from_aescrypt_object(aescrypt_object);
5317 if (original_k_start == NULL) return false;
5318
5319 // Call the stub.
5320 make_runtime_call(RC_LEAF|RC_NO_FP, OptoRuntime::aescrypt_block_Type(),
5321 stubAddr, stubName, TypePtr::BOTTOM,
5322 src_start, dest_start, k_start, original_k_start);
5323 } else {
5324 // Call the stub.
5325 make_runtime_call(RC_LEAF|RC_NO_FP, OptoRuntime::aescrypt_block_Type(),
5326 stubAddr, stubName, TypePtr::BOTTOM,
5327 src_start, dest_start, k_start);
5328 }
5329
5330 return true;
5331 }
5332
5333 //------------------------------inline_cipherBlockChaining_AESCrypt-----------------------
5334 bool LibraryCallKit::inline_cipherBlockChaining_AESCrypt(vmIntrinsics::ID id) {
5335 address stubAddr;
5336 const char *stubName;
5337
5338 assert(UseAES, "need AES instruction support");
5339
5340 switch(id) {
5341 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
5342 stubAddr = StubRoutines::cipherBlockChaining_encryptAESCrypt();
5343 stubName = "cipherBlockChaining_encryptAESCrypt";
5344 break;
5345 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
5346 stubAddr = StubRoutines::cipherBlockChaining_decryptAESCrypt();
5347 stubName = "cipherBlockChaining_decryptAESCrypt";
5348 break;
5349 }
5350 if (stubAddr == NULL) return false;
5351
5352 Node* cipherBlockChaining_object = argument(0);
5353 Node* src = argument(1);
5354 Node* src_offset = argument(2);
5355 Node* len = argument(3);
5356 Node* dest = argument(4);
5357 Node* dest_offset = argument(5);
5358
5359 // (1) src and dest are arrays.
5360 const Type* src_type = src->Value(&_gvn);
5361 const Type* dest_type = dest->Value(&_gvn);
5362 const TypeAryPtr* top_src = src_type->isa_aryptr();
5363 const TypeAryPtr* top_dest = dest_type->isa_aryptr();
5364 assert (top_src != NULL && top_src->klass() != NULL
5365 && top_dest != NULL && top_dest->klass() != NULL, "args are strange");
5366
5367 // checks are the responsibility of the caller
5368 Node* src_start = src;
5369 Node* dest_start = dest;
5370 if (src_offset != NULL || dest_offset != NULL) {
5371 assert(src_offset != NULL && dest_offset != NULL, "");
5372 src_start = array_element_address(src, src_offset, T_BYTE);
5373 dest_start = array_element_address(dest, dest_offset, T_BYTE);
5374 }
5375
5376 // if we are in this set of code, we "know" the embeddedCipher is an AESCrypt object
5377 // (because of the predicated logic executed earlier).
5378 // so we cast it here safely.
5379 // this requires a newer class file that has this array as littleEndian ints, otherwise we revert to java
5380
5381 Node* embeddedCipherObj = load_field_from_object(cipherBlockChaining_object, "embeddedCipher", "Lcom/sun/crypto/provider/SymmetricCipher;", /*is_exact*/ false);
5382 if (embeddedCipherObj == NULL) return false;
5383
5384 // cast it to what we know it will be at runtime
5385 const TypeInstPtr* tinst = _gvn.type(cipherBlockChaining_object)->isa_instptr();
5386 assert(tinst != NULL, "CBC obj is null");
5387 assert(tinst->klass()->is_loaded(), "CBC obj is not loaded");
5388 ciKlass* klass_AESCrypt = tinst->klass()->as_instance_klass()->find_klass(ciSymbol::make("com/sun/crypto/provider/AESCrypt"));
5389 assert(klass_AESCrypt->is_loaded(), "predicate checks that this class is loaded");
5390
5391 ciInstanceKlass* instklass_AESCrypt = klass_AESCrypt->as_instance_klass();
5392 const TypeKlassPtr* aklass = TypeKlassPtr::make(instklass_AESCrypt);
5393 const TypeOopPtr* xtype = aklass->as_instance_type();
5394 Node* aescrypt_object = new CheckCastPPNode(control(), embeddedCipherObj, xtype);
5395 aescrypt_object = _gvn.transform(aescrypt_object);
5396
5397 // we need to get the start of the aescrypt_object's expanded key array
5398 Node* k_start = get_key_start_from_aescrypt_object(aescrypt_object);
5399 if (k_start == NULL) return false;
5400
5401 // similarly, get the start address of the r vector
5402 Node* objRvec = load_field_from_object(cipherBlockChaining_object, "r", "[B", /*is_exact*/ false);
5403 if (objRvec == NULL) return false;
5404 Node* r_start = array_element_address(objRvec, intcon(0), T_BYTE);
5405
5406 Node* cbcCrypt;
5407 if (Matcher::pass_original_key_for_aes()) {
5408 // on SPARC we need to pass the original key since key expansion needs to happen in intrinsics due to
5409 // compatibility issues between Java key expansion and SPARC crypto instructions
5410 Node* original_k_start = get_original_key_start_from_aescrypt_object(aescrypt_object);
5411 if (original_k_start == NULL) return false;
5412
5413 // Call the stub, passing src_start, dest_start, k_start, r_start, src_len and original_k_start
5414 cbcCrypt = make_runtime_call(RC_LEAF|RC_NO_FP,
5415 OptoRuntime::cipherBlockChaining_aescrypt_Type(),
5416 stubAddr, stubName, TypePtr::BOTTOM,
5417 src_start, dest_start, k_start, r_start, len, original_k_start);
5418 } else {
5419 // Call the stub, passing src_start, dest_start, k_start, r_start and src_len
5420 cbcCrypt = make_runtime_call(RC_LEAF|RC_NO_FP,
5421 OptoRuntime::cipherBlockChaining_aescrypt_Type(),
5422 stubAddr, stubName, TypePtr::BOTTOM,
5423 src_start, dest_start, k_start, r_start, len);
5424 }
5425
5426 // return cipher length (int)
5427 Node* retvalue = _gvn.transform(new ProjNode(cbcCrypt, TypeFunc::Parms));
5428 set_result(retvalue);
5429 return true;
5430 }
5431
5432 //------------------------------get_key_start_from_aescrypt_object-----------------------
5433 Node * LibraryCallKit::get_key_start_from_aescrypt_object(Node *aescrypt_object) {
5434 Node* objAESCryptKey = load_field_from_object(aescrypt_object, "K", "[I", /*is_exact*/ false);
5435 assert (objAESCryptKey != NULL, "wrong version of com.sun.crypto.provider.AESCrypt");
5436 if (objAESCryptKey == NULL) return (Node *) NULL;
5437
5438 // now have the array, need to get the start address of the K array
5439 Node* k_start = array_element_address(objAESCryptKey, intcon(0), T_INT);
5440 return k_start;
5441 }
5442
5443 //------------------------------get_original_key_start_from_aescrypt_object-----------------------
5444 Node * LibraryCallKit::get_original_key_start_from_aescrypt_object(Node *aescrypt_object) {
5445 Node* objAESCryptKey = load_field_from_object(aescrypt_object, "lastKey", "[B", /*is_exact*/ false);
5446 assert (objAESCryptKey != NULL, "wrong version of com.sun.crypto.provider.AESCrypt");
5447 if (objAESCryptKey == NULL) return (Node *) NULL;
5448
5449 // now have the array, need to get the start address of the lastKey array
5450 Node* original_k_start = array_element_address(objAESCryptKey, intcon(0), T_BYTE);
5451 return original_k_start;
5452 }
5453
5454 //----------------------------inline_cipherBlockChaining_AESCrypt_predicate----------------------------
5455 // Return node representing slow path of predicate check.
5456 // the pseudo code we want to emulate with this predicate is:
5457 // for encryption:
5458 // if (embeddedCipherObj instanceof AESCrypt) do_intrinsic, else do_javapath
5459 // for decryption:
5460 // if ((embeddedCipherObj instanceof AESCrypt) && (cipher!=plain)) do_intrinsic, else do_javapath
5461 // note cipher==plain is more conservative than the original java code but that's OK
5462 //
5463 Node* LibraryCallKit::inline_cipherBlockChaining_AESCrypt_predicate(bool decrypting) {
5464 // The receiver was checked for NULL already.
5465 Node* objCBC = argument(0);
5466
5467 // Load embeddedCipher field of CipherBlockChaining object.
5468 Node* embeddedCipherObj = load_field_from_object(objCBC, "embeddedCipher", "Lcom/sun/crypto/provider/SymmetricCipher;", /*is_exact*/ false);
5469
5470 // get AESCrypt klass for instanceOf check
5471 // AESCrypt might not be loaded yet if some other SymmetricCipher got us to this compile point
5472 // will have same classloader as CipherBlockChaining object
5473 const TypeInstPtr* tinst = _gvn.type(objCBC)->isa_instptr();
5474 assert(tinst != NULL, "CBCobj is null");
5475 assert(tinst->klass()->is_loaded(), "CBCobj is not loaded");
5476
5477 // we want to do an instanceof comparison against the AESCrypt class
5478 ciKlass* klass_AESCrypt = tinst->klass()->as_instance_klass()->find_klass(ciSymbol::make("com/sun/crypto/provider/AESCrypt"));
5479 if (!klass_AESCrypt->is_loaded()) {
5480 // if AESCrypt is not even loaded, we never take the intrinsic fast path
5481 Node* ctrl = control();
5482 set_control(top()); // no regular fast path
5483 return ctrl;
5484 }
5485 ciInstanceKlass* instklass_AESCrypt = klass_AESCrypt->as_instance_klass();
5486
5487 Node* instof = gen_instanceof(embeddedCipherObj, makecon(TypeKlassPtr::make(instklass_AESCrypt)));
5488 Node* cmp_instof = _gvn.transform(new CmpINode(instof, intcon(1)));
5489 Node* bool_instof = _gvn.transform(new BoolNode(cmp_instof, BoolTest::ne));
5490
5491 Node* instof_false = generate_guard(bool_instof, NULL, PROB_MIN);
5492
5493 // for encryption, we are done
5494 if (!decrypting)
5495 return instof_false; // even if it is NULL
5496
5497 // for decryption, we need to add a further check to avoid
5498 // taking the intrinsic path when cipher and plain are the same
5499 // see the original java code for why.
5500 RegionNode* region = new RegionNode(3);
5501 region->init_req(1, instof_false);
5502 Node* src = argument(1);
5503 Node* dest = argument(4);
5504 Node* cmp_src_dest = _gvn.transform(new CmpPNode(src, dest));
5505 Node* bool_src_dest = _gvn.transform(new BoolNode(cmp_src_dest, BoolTest::eq));
5506 Node* src_dest_conjoint = generate_guard(bool_src_dest, NULL, PROB_MIN);
5507 region->init_req(2, src_dest_conjoint);
5508
5509 record_for_igvn(region);
5510 return _gvn.transform(region);
5511 }
5512
5513 //------------------------------inline_sha_implCompress-----------------------
5514 //
5515 // Calculate SHA (i.e., SHA-1) for single-block byte[] array.
5516 // void com.sun.security.provider.SHA.implCompress(byte[] buf, int ofs)
5517 //
5518 // Calculate SHA2 (i.e., SHA-244 or SHA-256) for single-block byte[] array.
5519 // void com.sun.security.provider.SHA2.implCompress(byte[] buf, int ofs)
5520 //
5521 // Calculate SHA5 (i.e., SHA-384 or SHA-512) for single-block byte[] array.
5522 // void com.sun.security.provider.SHA5.implCompress(byte[] buf, int ofs)
5523 //
5524 bool LibraryCallKit::inline_sha_implCompress(vmIntrinsics::ID id) {
5525 assert(callee()->signature()->size() == 2, "sha_implCompress has 2 parameters");
5526
5527 Node* sha_obj = argument(0);
5528 Node* src = argument(1); // type oop
5529 Node* ofs = argument(2); // type int
5530
5531 const Type* src_type = src->Value(&_gvn);
5532 const TypeAryPtr* top_src = src_type->isa_aryptr();
5533 if (top_src == NULL || top_src->klass() == NULL) {
5534 // failed array check
5535 return false;
5536 }
5537 // Figure out the size and type of the elements we will be copying.
5538 BasicType src_elem = src_type->isa_aryptr()->klass()->as_array_klass()->element_type()->basic_type();
5539 if (src_elem != T_BYTE) {
5540 return false;
5541 }
5542 // 'src_start' points to src array + offset
5543 Node* src_start = array_element_address(src, ofs, src_elem);
5544 Node* state = NULL;
5545 address stubAddr;
5546 const char *stubName;
5547
5548 switch(id) {
5549 case vmIntrinsics::_sha_implCompress:
5550 assert(UseSHA1Intrinsics, "need SHA1 instruction support");
5551 state = get_state_from_sha_object(sha_obj);
5552 stubAddr = StubRoutines::sha1_implCompress();
5553 stubName = "sha1_implCompress";
5554 break;
5555 case vmIntrinsics::_sha2_implCompress:
5556 assert(UseSHA256Intrinsics, "need SHA256 instruction support");
5557 state = get_state_from_sha_object(sha_obj);
5558 stubAddr = StubRoutines::sha256_implCompress();
5559 stubName = "sha256_implCompress";
5560 break;
5561 case vmIntrinsics::_sha5_implCompress:
5562 assert(UseSHA512Intrinsics, "need SHA512 instruction support");
5563 state = get_state_from_sha5_object(sha_obj);
5564 stubAddr = StubRoutines::sha512_implCompress();
5565 stubName = "sha512_implCompress";
5566 break;
5567 default:
5568 fatal_unexpected_iid(id);
5569 return false;
5570 }
5571 if (state == NULL) return false;
5572
5573 // Call the stub.
5574 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, OptoRuntime::sha_implCompress_Type(),
5575 stubAddr, stubName, TypePtr::BOTTOM,
5576 src_start, state);
5577
5578 return true;
5579 }
5580
5581 //------------------------------inline_digestBase_implCompressMB-----------------------
5582 //
5583 // Calculate SHA/SHA2/SHA5 for multi-block byte[] array.
5584 // int com.sun.security.provider.DigestBase.implCompressMultiBlock(byte[] b, int ofs, int limit)
5585 //
5586 bool LibraryCallKit::inline_digestBase_implCompressMB(int predicate) {
5587 assert(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics,
5588 "need SHA1/SHA256/SHA512 instruction support");
5589 assert((uint)predicate < 3, "sanity");
5590 assert(callee()->signature()->size() == 3, "digestBase_implCompressMB has 3 parameters");
5591
5592 Node* digestBase_obj = argument(0); // The receiver was checked for NULL already.
5593 Node* src = argument(1); // byte[] array
5594 Node* ofs = argument(2); // type int
5595 Node* limit = argument(3); // type int
5596
5597 const Type* src_type = src->Value(&_gvn);
5598 const TypeAryPtr* top_src = src_type->isa_aryptr();
5599 if (top_src == NULL || top_src->klass() == NULL) {
5600 // failed array check
5601 return false;
5602 }
5603 // Figure out the size and type of the elements we will be copying.
5604 BasicType src_elem = src_type->isa_aryptr()->klass()->as_array_klass()->element_type()->basic_type();
5605 if (src_elem != T_BYTE) {
5606 return false;
5607 }
5608 // 'src_start' points to src array + offset
5609 Node* src_start = array_element_address(src, ofs, src_elem);
5610
5611 const char* klass_SHA_name = NULL;
5612 const char* stub_name = NULL;
5613 address stub_addr = NULL;
5614 bool long_state = false;
5615
5616 switch (predicate) {
5617 case 0:
5618 if (UseSHA1Intrinsics) {
5619 klass_SHA_name = "sun/security/provider/SHA";
5620 stub_name = "sha1_implCompressMB";
5621 stub_addr = StubRoutines::sha1_implCompressMB();
5622 }
5623 break;
5624 case 1:
5625 if (UseSHA256Intrinsics) {
5626 klass_SHA_name = "sun/security/provider/SHA2";
5627 stub_name = "sha256_implCompressMB";
5628 stub_addr = StubRoutines::sha256_implCompressMB();
5629 }
5630 break;
5631 case 2:
5632 if (UseSHA512Intrinsics) {
5633 klass_SHA_name = "sun/security/provider/SHA5";
5634 stub_name = "sha512_implCompressMB";
5635 stub_addr = StubRoutines::sha512_implCompressMB();
5636 long_state = true;
5637 }
5638 break;
5639 default:
5640 fatal(err_msg_res("unknown SHA intrinsic predicate: %d", predicate));
5641 }
5642 if (klass_SHA_name != NULL) {
5643 // get DigestBase klass to lookup for SHA klass
5644 const TypeInstPtr* tinst = _gvn.type(digestBase_obj)->isa_instptr();
5645 assert(tinst != NULL, "digestBase_obj is not instance???");
5646 assert(tinst->klass()->is_loaded(), "DigestBase is not loaded");
5647
5648 ciKlass* klass_SHA = tinst->klass()->as_instance_klass()->find_klass(ciSymbol::make(klass_SHA_name));
5649 assert(klass_SHA->is_loaded(), "predicate checks that this class is loaded");
5650 ciInstanceKlass* instklass_SHA = klass_SHA->as_instance_klass();
5651 return inline_sha_implCompressMB(digestBase_obj, instklass_SHA, long_state, stub_addr, stub_name, src_start, ofs, limit);
5652 }
5653 return false;
5654 }
5655 //------------------------------inline_sha_implCompressMB-----------------------
5656 bool LibraryCallKit::inline_sha_implCompressMB(Node* digestBase_obj, ciInstanceKlass* instklass_SHA,
5657 bool long_state, address stubAddr, const char *stubName,
5658 Node* src_start, Node* ofs, Node* limit) {
5659 const TypeKlassPtr* aklass = TypeKlassPtr::make(instklass_SHA);
5660 const TypeOopPtr* xtype = aklass->as_instance_type();
5661 Node* sha_obj = new CheckCastPPNode(control(), digestBase_obj, xtype);
5662 sha_obj = _gvn.transform(sha_obj);
5663
5664 Node* state;
5665 if (long_state) {
5666 state = get_state_from_sha5_object(sha_obj);
5667 } else {
5668 state = get_state_from_sha_object(sha_obj);
5669 }
5670 if (state == NULL) return false;
5671
5672 // Call the stub.
5673 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP,
5674 OptoRuntime::digestBase_implCompressMB_Type(),
5675 stubAddr, stubName, TypePtr::BOTTOM,
5676 src_start, state, ofs, limit);
5677 // return ofs (int)
5678 Node* result = _gvn.transform(new ProjNode(call, TypeFunc::Parms));
5679 set_result(result);
5680
5681 return true;
5682 }
5683
5684 //------------------------------get_state_from_sha_object-----------------------
5685 Node * LibraryCallKit::get_state_from_sha_object(Node *sha_object) {
5686 Node* sha_state = load_field_from_object(sha_object, "state", "[I", /*is_exact*/ false);
5687 assert (sha_state != NULL, "wrong version of sun.security.provider.SHA/SHA2");
5688 if (sha_state == NULL) return (Node *) NULL;
5689
5690 // now have the array, need to get the start address of the state array
5691 Node* state = array_element_address(sha_state, intcon(0), T_INT);
5692 return state;
5693 }
5694
5695 //------------------------------get_state_from_sha5_object-----------------------
5696 Node * LibraryCallKit::get_state_from_sha5_object(Node *sha_object) {
5697 Node* sha_state = load_field_from_object(sha_object, "state", "[J", /*is_exact*/ false);
5698 assert (sha_state != NULL, "wrong version of sun.security.provider.SHA5");
5699 if (sha_state == NULL) return (Node *) NULL;
5700
5701 // now have the array, need to get the start address of the state array
5702 Node* state = array_element_address(sha_state, intcon(0), T_LONG);
5703 return state;
5704 }
5705
5706 //----------------------------inline_digestBase_implCompressMB_predicate----------------------------
5707 // Return node representing slow path of predicate check.
5708 // the pseudo code we want to emulate with this predicate is:
5709 // if (digestBaseObj instanceof SHA/SHA2/SHA5) do_intrinsic, else do_javapath
5710 //
5711 Node* LibraryCallKit::inline_digestBase_implCompressMB_predicate(int predicate) {
5712 assert(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics,
5713 "need SHA1/SHA256/SHA512 instruction support");
5714 assert((uint)predicate < 3, "sanity");
5715
5716 // The receiver was checked for NULL already.
5717 Node* digestBaseObj = argument(0);
5718
5719 // get DigestBase klass for instanceOf check
5720 const TypeInstPtr* tinst = _gvn.type(digestBaseObj)->isa_instptr();
5721 assert(tinst != NULL, "digestBaseObj is null");
5722 assert(tinst->klass()->is_loaded(), "DigestBase is not loaded");
5723
5724 const char* klass_SHA_name = NULL;
5725 switch (predicate) {
5726 case 0:
5727 if (UseSHA1Intrinsics) {
5728 // we want to do an instanceof comparison against the SHA class
5729 klass_SHA_name = "sun/security/provider/SHA";
5730 }
5731 break;
5732 case 1:
5733 if (UseSHA256Intrinsics) {
5734 // we want to do an instanceof comparison against the SHA2 class
5735 klass_SHA_name = "sun/security/provider/SHA2";
5736 }
5737 break;
5738 case 2:
5739 if (UseSHA512Intrinsics) {
5740 // we want to do an instanceof comparison against the SHA5 class
5741 klass_SHA_name = "sun/security/provider/SHA5";
5742 }
5743 break;
5744 default:
5745 fatal(err_msg_res("unknown SHA intrinsic predicate: %d", predicate));
5746 }
5747
5748 ciKlass* klass_SHA = NULL;
5749 if (klass_SHA_name != NULL) {
5750 klass_SHA = tinst->klass()->as_instance_klass()->find_klass(ciSymbol::make(klass_SHA_name));
5751 }
5752 if ((klass_SHA == NULL) || !klass_SHA->is_loaded()) {
5753 // if none of SHA/SHA2/SHA5 is loaded, we never take the intrinsic fast path
5754 Node* ctrl = control();
5755 set_control(top()); // no intrinsic path
5756 return ctrl;
5757 }
5758 ciInstanceKlass* instklass_SHA = klass_SHA->as_instance_klass();
5759
5760 Node* instofSHA = gen_instanceof(digestBaseObj, makecon(TypeKlassPtr::make(instklass_SHA)));
5761 Node* cmp_instof = _gvn.transform(new CmpINode(instofSHA, intcon(1)));
5762 Node* bool_instof = _gvn.transform(new BoolNode(cmp_instof, BoolTest::ne));
5763 Node* instof_false = generate_guard(bool_instof, NULL, PROB_MIN);
5764
5765 return instof_false; // even if it is NULL
5766 }