1 /*
2 * Copyright 1999-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_library_call.cpp.incl"
27
28 class LibraryIntrinsic : public InlineCallGenerator {
29 // Extend the set of intrinsics known to the runtime:
30 public:
31 private:
32 bool _is_virtual;
33 vmIntrinsics::ID _intrinsic_id;
34
35 public:
36 LibraryIntrinsic(ciMethod* m, bool is_virtual, vmIntrinsics::ID id)
37 : InlineCallGenerator(m),
38 _is_virtual(is_virtual),
39 _intrinsic_id(id)
40 {
41 }
42 virtual bool is_intrinsic() const { return true; }
43 virtual bool is_virtual() const { return _is_virtual; }
44 virtual JVMState* generate(JVMState* jvms);
45 vmIntrinsics::ID intrinsic_id() const { return _intrinsic_id; }
46 };
47
48
49 // Local helper class for LibraryIntrinsic:
50 class LibraryCallKit : public GraphKit {
51 private:
52 LibraryIntrinsic* _intrinsic; // the library intrinsic being called
53
54 public:
55 LibraryCallKit(JVMState* caller, LibraryIntrinsic* intrinsic)
56 : GraphKit(caller),
57 _intrinsic(intrinsic)
58 {
59 }
60
61 ciMethod* caller() const { return jvms()->method(); }
62 int bci() const { return jvms()->bci(); }
63 LibraryIntrinsic* intrinsic() const { return _intrinsic; }
64 vmIntrinsics::ID intrinsic_id() const { return _intrinsic->intrinsic_id(); }
65 ciMethod* callee() const { return _intrinsic->method(); }
66 ciSignature* signature() const { return callee()->signature(); }
67 int arg_size() const { return callee()->arg_size(); }
68
69 bool try_to_inline();
70
71 // Helper functions to inline natives
72 void push_result(RegionNode* region, PhiNode* value);
73 Node* generate_guard(Node* test, RegionNode* region, float true_prob);
74 Node* generate_slow_guard(Node* test, RegionNode* region);
75 Node* generate_fair_guard(Node* test, RegionNode* region);
76 Node* generate_negative_guard(Node* index, RegionNode* region,
77 // resulting CastII of index:
78 Node* *pos_index = NULL);
79 Node* generate_nonpositive_guard(Node* index, bool never_negative,
80 // resulting CastII of index:
81 Node* *pos_index = NULL);
82 Node* generate_limit_guard(Node* offset, Node* subseq_length,
83 Node* array_length,
84 RegionNode* region);
85 Node* generate_current_thread(Node* &tls_output);
86 address basictype2arraycopy(BasicType t, Node *src_offset, Node *dest_offset,
87 bool disjoint_bases, const char* &name);
88 Node* load_mirror_from_klass(Node* klass);
89 Node* load_klass_from_mirror_common(Node* mirror, bool never_see_null,
90 int nargs,
91 RegionNode* region, int null_path,
92 int offset);
93 Node* load_klass_from_mirror(Node* mirror, bool never_see_null, int nargs,
94 RegionNode* region, int null_path) {
95 int offset = java_lang_Class::klass_offset_in_bytes();
96 return load_klass_from_mirror_common(mirror, never_see_null, nargs,
97 region, null_path,
98 offset);
99 }
100 Node* load_array_klass_from_mirror(Node* mirror, bool never_see_null,
101 int nargs,
102 RegionNode* region, int null_path) {
103 int offset = java_lang_Class::array_klass_offset_in_bytes();
104 return load_klass_from_mirror_common(mirror, never_see_null, nargs,
105 region, null_path,
106 offset);
107 }
108 Node* generate_access_flags_guard(Node* kls,
109 int modifier_mask, int modifier_bits,
110 RegionNode* region);
111 Node* generate_interface_guard(Node* kls, RegionNode* region);
112 Node* generate_array_guard(Node* kls, RegionNode* region) {
113 return generate_array_guard_common(kls, region, false, false);
114 }
115 Node* generate_non_array_guard(Node* kls, RegionNode* region) {
116 return generate_array_guard_common(kls, region, false, true);
117 }
118 Node* generate_objArray_guard(Node* kls, RegionNode* region) {
119 return generate_array_guard_common(kls, region, true, false);
120 }
121 Node* generate_non_objArray_guard(Node* kls, RegionNode* region) {
122 return generate_array_guard_common(kls, region, true, true);
123 }
124 Node* generate_array_guard_common(Node* kls, RegionNode* region,
125 bool obj_array, bool not_array);
126 Node* generate_virtual_guard(Node* obj_klass, RegionNode* slow_region);
127 CallJavaNode* generate_method_call(vmIntrinsics::ID method_id,
128 bool is_virtual = false, bool is_static = false);
129 CallJavaNode* generate_method_call_static(vmIntrinsics::ID method_id) {
130 return generate_method_call(method_id, false, true);
131 }
132 CallJavaNode* generate_method_call_virtual(vmIntrinsics::ID method_id) {
133 return generate_method_call(method_id, true, false);
134 }
135
136 Node* make_string_method_node(int opcode, Node* str1, Node* cnt1, Node* str2, Node* cnt2);
137 bool inline_string_compareTo();
138 bool inline_string_indexOf();
139 Node* string_indexOf(Node* string_object, ciTypeArray* target_array, jint offset, jint cache_i, jint md2_i);
140 bool inline_string_equals();
141 Node* pop_math_arg();
142 bool runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName);
143 bool inline_math_native(vmIntrinsics::ID id);
144 bool inline_trig(vmIntrinsics::ID id);
145 bool inline_trans(vmIntrinsics::ID id);
146 bool inline_abs(vmIntrinsics::ID id);
147 bool inline_sqrt(vmIntrinsics::ID id);
148 bool inline_pow(vmIntrinsics::ID id);
149 bool inline_exp(vmIntrinsics::ID id);
150 bool inline_min_max(vmIntrinsics::ID id);
151 Node* generate_min_max(vmIntrinsics::ID id, Node* x, Node* y);
152 // This returns Type::AnyPtr, RawPtr, or OopPtr.
153 int classify_unsafe_addr(Node* &base, Node* &offset);
154 Node* make_unsafe_address(Node* base, Node* offset);
155 bool inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile);
156 bool inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static);
157 bool inline_unsafe_allocate();
158 bool inline_unsafe_copyMemory();
159 bool inline_native_currentThread();
160 bool inline_native_time_funcs(bool isNano);
161 bool inline_native_isInterrupted();
162 bool inline_native_Class_query(vmIntrinsics::ID id);
163 bool inline_native_subtype_check();
164
165 bool inline_native_newArray();
166 bool inline_native_getLength();
167 bool inline_array_copyOf(bool is_copyOfRange);
168 bool inline_array_equals();
169 void copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array, bool card_mark);
170 bool inline_native_clone(bool is_virtual);
171 bool inline_native_Reflection_getCallerClass();
172 bool inline_native_AtomicLong_get();
173 bool inline_native_AtomicLong_attemptUpdate();
174 bool is_method_invoke_or_aux_frame(JVMState* jvms);
175 // Helper function for inlining native object hash method
176 bool inline_native_hashcode(bool is_virtual, bool is_static);
177 bool inline_native_getClass();
178
179 // Helper functions for inlining arraycopy
180 bool inline_arraycopy();
181 void generate_arraycopy(const TypePtr* adr_type,
182 BasicType basic_elem_type,
183 Node* src, Node* src_offset,
184 Node* dest, Node* dest_offset,
185 Node* copy_length,
186 bool disjoint_bases = false,
187 bool length_never_negative = false,
188 RegionNode* slow_region = NULL);
189 AllocateArrayNode* tightly_coupled_allocation(Node* ptr,
190 RegionNode* slow_region);
191 void generate_clear_array(const TypePtr* adr_type,
192 Node* dest,
193 BasicType basic_elem_type,
194 Node* slice_off,
195 Node* slice_len,
196 Node* slice_end);
197 bool generate_block_arraycopy(const TypePtr* adr_type,
198 BasicType basic_elem_type,
199 AllocateNode* alloc,
200 Node* src, Node* src_offset,
201 Node* dest, Node* dest_offset,
202 Node* dest_size);
203 void generate_slow_arraycopy(const TypePtr* adr_type,
204 Node* src, Node* src_offset,
205 Node* dest, Node* dest_offset,
206 Node* copy_length);
207 Node* generate_checkcast_arraycopy(const TypePtr* adr_type,
208 Node* dest_elem_klass,
209 Node* src, Node* src_offset,
210 Node* dest, Node* dest_offset,
211 Node* copy_length);
212 Node* generate_generic_arraycopy(const TypePtr* adr_type,
213 Node* src, Node* src_offset,
214 Node* dest, Node* dest_offset,
215 Node* copy_length);
216 void generate_unchecked_arraycopy(const TypePtr* adr_type,
217 BasicType basic_elem_type,
218 bool disjoint_bases,
219 Node* src, Node* src_offset,
220 Node* dest, Node* dest_offset,
221 Node* copy_length);
222 bool inline_unsafe_CAS(BasicType type);
223 bool inline_unsafe_ordered_store(BasicType type);
224 bool inline_fp_conversions(vmIntrinsics::ID id);
225 bool inline_numberOfLeadingZeros(vmIntrinsics::ID id);
226 bool inline_numberOfTrailingZeros(vmIntrinsics::ID id);
227 bool inline_bitCount(vmIntrinsics::ID id);
228 bool inline_reverseBytes(vmIntrinsics::ID id);
229 };
230
231
232 //---------------------------make_vm_intrinsic----------------------------
233 CallGenerator* Compile::make_vm_intrinsic(ciMethod* m, bool is_virtual) {
234 vmIntrinsics::ID id = m->intrinsic_id();
235 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
236
237 if (DisableIntrinsic[0] != '\0'
238 && strstr(DisableIntrinsic, vmIntrinsics::name_at(id)) != NULL) {
239 // disabled by a user request on the command line:
240 // example: -XX:DisableIntrinsic=_hashCode,_getClass
241 return NULL;
242 }
243
244 if (!m->is_loaded()) {
245 // do not attempt to inline unloaded methods
246 return NULL;
247 }
248
249 // Only a few intrinsics implement a virtual dispatch.
250 // They are expensive calls which are also frequently overridden.
251 if (is_virtual) {
252 switch (id) {
253 case vmIntrinsics::_hashCode:
254 case vmIntrinsics::_clone:
255 // OK, Object.hashCode and Object.clone intrinsics come in both flavors
256 break;
257 default:
258 return NULL;
259 }
260 }
261
262 // -XX:-InlineNatives disables nearly all intrinsics:
263 if (!InlineNatives) {
264 switch (id) {
265 case vmIntrinsics::_indexOf:
266 case vmIntrinsics::_compareTo:
267 case vmIntrinsics::_equals:
268 case vmIntrinsics::_equalsC:
269 break; // InlineNatives does not control String.compareTo
270 default:
271 return NULL;
272 }
273 }
274
275 switch (id) {
276 case vmIntrinsics::_compareTo:
277 if (!SpecialStringCompareTo) return NULL;
278 break;
279 case vmIntrinsics::_indexOf:
280 if (!SpecialStringIndexOf) return NULL;
281 break;
282 case vmIntrinsics::_equals:
283 if (!SpecialStringEquals) return NULL;
284 break;
285 case vmIntrinsics::_equalsC:
286 if (!SpecialArraysEquals) return NULL;
287 break;
288 case vmIntrinsics::_arraycopy:
289 if (!InlineArrayCopy) return NULL;
290 break;
291 case vmIntrinsics::_copyMemory:
292 if (StubRoutines::unsafe_arraycopy() == NULL) return NULL;
293 if (!InlineArrayCopy) return NULL;
294 break;
295 case vmIntrinsics::_hashCode:
296 if (!InlineObjectHash) return NULL;
297 break;
298 case vmIntrinsics::_clone:
299 case vmIntrinsics::_copyOf:
300 case vmIntrinsics::_copyOfRange:
301 if (!InlineObjectCopy) return NULL;
302 // These also use the arraycopy intrinsic mechanism:
303 if (!InlineArrayCopy) return NULL;
304 break;
305 case vmIntrinsics::_checkIndex:
306 // We do not intrinsify this. The optimizer does fine with it.
307 return NULL;
308
309 case vmIntrinsics::_get_AtomicLong:
310 case vmIntrinsics::_attemptUpdate:
311 if (!InlineAtomicLong) return NULL;
312 break;
313
314 case vmIntrinsics::_getCallerClass:
315 if (!UseNewReflection) return NULL;
316 if (!InlineReflectionGetCallerClass) return NULL;
317 if (!JDK_Version::is_gte_jdk14x_version()) return NULL;
318 break;
319
320 case vmIntrinsics::_bitCount_i:
321 case vmIntrinsics::_bitCount_l:
322 if (!UsePopCountInstruction) return NULL;
323 break;
324
325 default:
326 assert(id <= vmIntrinsics::LAST_COMPILER_INLINE, "caller responsibility");
327 assert(id != vmIntrinsics::_Object_init && id != vmIntrinsics::_invoke, "enum out of order?");
328 break;
329 }
330
331 // -XX:-InlineClassNatives disables natives from the Class class.
332 // The flag applies to all reflective calls, notably Array.newArray
333 // (visible to Java programmers as Array.newInstance).
334 if (m->holder()->name() == ciSymbol::java_lang_Class() ||
335 m->holder()->name() == ciSymbol::java_lang_reflect_Array()) {
336 if (!InlineClassNatives) return NULL;
337 }
338
339 // -XX:-InlineThreadNatives disables natives from the Thread class.
340 if (m->holder()->name() == ciSymbol::java_lang_Thread()) {
341 if (!InlineThreadNatives) return NULL;
342 }
343
344 // -XX:-InlineMathNatives disables natives from the Math,Float and Double classes.
345 if (m->holder()->name() == ciSymbol::java_lang_Math() ||
346 m->holder()->name() == ciSymbol::java_lang_Float() ||
347 m->holder()->name() == ciSymbol::java_lang_Double()) {
348 if (!InlineMathNatives) return NULL;
349 }
350
351 // -XX:-InlineUnsafeOps disables natives from the Unsafe class.
352 if (m->holder()->name() == ciSymbol::sun_misc_Unsafe()) {
353 if (!InlineUnsafeOps) return NULL;
354 }
355
356 return new LibraryIntrinsic(m, is_virtual, (vmIntrinsics::ID) id);
357 }
358
359 //----------------------register_library_intrinsics-----------------------
360 // Initialize this file's data structures, for each Compile instance.
361 void Compile::register_library_intrinsics() {
362 // Nothing to do here.
363 }
364
365 JVMState* LibraryIntrinsic::generate(JVMState* jvms) {
366 LibraryCallKit kit(jvms, this);
367 Compile* C = kit.C;
368 int nodes = C->unique();
369 #ifndef PRODUCT
370 if ((PrintIntrinsics || PrintInlining NOT_PRODUCT( || PrintOptoInlining) ) && Verbose) {
371 char buf[1000];
372 const char* str = vmIntrinsics::short_name_as_C_string(intrinsic_id(), buf, sizeof(buf));
373 tty->print_cr("Intrinsic %s", str);
374 }
375 #endif
376 if (kit.try_to_inline()) {
377 if (PrintIntrinsics || PrintInlining NOT_PRODUCT( || PrintOptoInlining) ) {
378 tty->print("Inlining intrinsic %s%s at bci:%d in",
379 vmIntrinsics::name_at(intrinsic_id()),
380 (is_virtual() ? " (virtual)" : ""), kit.bci());
381 kit.caller()->print_short_name(tty);
382 tty->print_cr(" (%d bytes)", kit.caller()->code_size());
383 }
384 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_worked);
385 if (C->log()) {
386 C->log()->elem("intrinsic id='%s'%s nodes='%d'",
387 vmIntrinsics::name_at(intrinsic_id()),
388 (is_virtual() ? " virtual='1'" : ""),
389 C->unique() - nodes);
390 }
391 return kit.transfer_exceptions_into_jvms();
392 }
393
394 if (PrintIntrinsics) {
395 tty->print("Did not inline intrinsic %s%s at bci:%d in",
396 vmIntrinsics::name_at(intrinsic_id()),
397 (is_virtual() ? " (virtual)" : ""), kit.bci());
398 kit.caller()->print_short_name(tty);
399 tty->print_cr(" (%d bytes)", kit.caller()->code_size());
400 }
401 C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_failed);
402 return NULL;
403 }
404
405 bool LibraryCallKit::try_to_inline() {
406 // Handle symbolic names for otherwise undistinguished boolean switches:
407 const bool is_store = true;
408 const bool is_native_ptr = true;
409 const bool is_static = true;
410
411 switch (intrinsic_id()) {
412 case vmIntrinsics::_hashCode:
413 return inline_native_hashcode(intrinsic()->is_virtual(), !is_static);
414 case vmIntrinsics::_identityHashCode:
415 return inline_native_hashcode(/*!virtual*/ false, is_static);
416 case vmIntrinsics::_getClass:
417 return inline_native_getClass();
418
419 case vmIntrinsics::_dsin:
420 case vmIntrinsics::_dcos:
421 case vmIntrinsics::_dtan:
422 case vmIntrinsics::_dabs:
423 case vmIntrinsics::_datan2:
424 case vmIntrinsics::_dsqrt:
425 case vmIntrinsics::_dexp:
426 case vmIntrinsics::_dlog:
427 case vmIntrinsics::_dlog10:
428 case vmIntrinsics::_dpow:
429 return inline_math_native(intrinsic_id());
430
431 case vmIntrinsics::_min:
432 case vmIntrinsics::_max:
433 return inline_min_max(intrinsic_id());
434
435 case vmIntrinsics::_arraycopy:
436 return inline_arraycopy();
437
438 case vmIntrinsics::_compareTo:
439 return inline_string_compareTo();
440 case vmIntrinsics::_indexOf:
441 return inline_string_indexOf();
442 case vmIntrinsics::_equals:
443 return inline_string_equals();
444
445 case vmIntrinsics::_getObject:
446 return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, false);
447 case vmIntrinsics::_getBoolean:
448 return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, false);
449 case vmIntrinsics::_getByte:
450 return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, false);
451 case vmIntrinsics::_getShort:
452 return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, false);
453 case vmIntrinsics::_getChar:
454 return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, false);
455 case vmIntrinsics::_getInt:
456 return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, false);
457 case vmIntrinsics::_getLong:
458 return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, false);
459 case vmIntrinsics::_getFloat:
460 return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, false);
461 case vmIntrinsics::_getDouble:
462 return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, false);
463
464 case vmIntrinsics::_putObject:
465 return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, false);
466 case vmIntrinsics::_putBoolean:
467 return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, false);
468 case vmIntrinsics::_putByte:
469 return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, false);
470 case vmIntrinsics::_putShort:
471 return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, false);
472 case vmIntrinsics::_putChar:
473 return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, false);
474 case vmIntrinsics::_putInt:
475 return inline_unsafe_access(!is_native_ptr, is_store, T_INT, false);
476 case vmIntrinsics::_putLong:
477 return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, false);
478 case vmIntrinsics::_putFloat:
479 return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, false);
480 case vmIntrinsics::_putDouble:
481 return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, false);
482
483 case vmIntrinsics::_getByte_raw:
484 return inline_unsafe_access(is_native_ptr, !is_store, T_BYTE, false);
485 case vmIntrinsics::_getShort_raw:
486 return inline_unsafe_access(is_native_ptr, !is_store, T_SHORT, false);
487 case vmIntrinsics::_getChar_raw:
488 return inline_unsafe_access(is_native_ptr, !is_store, T_CHAR, false);
489 case vmIntrinsics::_getInt_raw:
490 return inline_unsafe_access(is_native_ptr, !is_store, T_INT, false);
491 case vmIntrinsics::_getLong_raw:
492 return inline_unsafe_access(is_native_ptr, !is_store, T_LONG, false);
493 case vmIntrinsics::_getFloat_raw:
494 return inline_unsafe_access(is_native_ptr, !is_store, T_FLOAT, false);
495 case vmIntrinsics::_getDouble_raw:
496 return inline_unsafe_access(is_native_ptr, !is_store, T_DOUBLE, false);
497 case vmIntrinsics::_getAddress_raw:
498 return inline_unsafe_access(is_native_ptr, !is_store, T_ADDRESS, false);
499
500 case vmIntrinsics::_putByte_raw:
501 return inline_unsafe_access(is_native_ptr, is_store, T_BYTE, false);
502 case vmIntrinsics::_putShort_raw:
503 return inline_unsafe_access(is_native_ptr, is_store, T_SHORT, false);
504 case vmIntrinsics::_putChar_raw:
505 return inline_unsafe_access(is_native_ptr, is_store, T_CHAR, false);
506 case vmIntrinsics::_putInt_raw:
507 return inline_unsafe_access(is_native_ptr, is_store, T_INT, false);
508 case vmIntrinsics::_putLong_raw:
509 return inline_unsafe_access(is_native_ptr, is_store, T_LONG, false);
510 case vmIntrinsics::_putFloat_raw:
511 return inline_unsafe_access(is_native_ptr, is_store, T_FLOAT, false);
512 case vmIntrinsics::_putDouble_raw:
513 return inline_unsafe_access(is_native_ptr, is_store, T_DOUBLE, false);
514 case vmIntrinsics::_putAddress_raw:
515 return inline_unsafe_access(is_native_ptr, is_store, T_ADDRESS, false);
516
517 case vmIntrinsics::_getObjectVolatile:
518 return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, true);
519 case vmIntrinsics::_getBooleanVolatile:
520 return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, true);
521 case vmIntrinsics::_getByteVolatile:
522 return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, true);
523 case vmIntrinsics::_getShortVolatile:
524 return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, true);
525 case vmIntrinsics::_getCharVolatile:
526 return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, true);
527 case vmIntrinsics::_getIntVolatile:
528 return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, true);
529 case vmIntrinsics::_getLongVolatile:
530 return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, true);
531 case vmIntrinsics::_getFloatVolatile:
532 return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, true);
533 case vmIntrinsics::_getDoubleVolatile:
534 return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, true);
535
536 case vmIntrinsics::_putObjectVolatile:
537 return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, true);
538 case vmIntrinsics::_putBooleanVolatile:
539 return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, true);
540 case vmIntrinsics::_putByteVolatile:
541 return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, true);
542 case vmIntrinsics::_putShortVolatile:
543 return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, true);
544 case vmIntrinsics::_putCharVolatile:
545 return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, true);
546 case vmIntrinsics::_putIntVolatile:
547 return inline_unsafe_access(!is_native_ptr, is_store, T_INT, true);
548 case vmIntrinsics::_putLongVolatile:
549 return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, true);
550 case vmIntrinsics::_putFloatVolatile:
551 return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, true);
552 case vmIntrinsics::_putDoubleVolatile:
553 return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, true);
554
555 case vmIntrinsics::_prefetchRead:
556 return inline_unsafe_prefetch(!is_native_ptr, !is_store, !is_static);
557 case vmIntrinsics::_prefetchWrite:
558 return inline_unsafe_prefetch(!is_native_ptr, is_store, !is_static);
559 case vmIntrinsics::_prefetchReadStatic:
560 return inline_unsafe_prefetch(!is_native_ptr, !is_store, is_static);
561 case vmIntrinsics::_prefetchWriteStatic:
562 return inline_unsafe_prefetch(!is_native_ptr, is_store, is_static);
563
564 case vmIntrinsics::_compareAndSwapObject:
565 return inline_unsafe_CAS(T_OBJECT);
566 case vmIntrinsics::_compareAndSwapInt:
567 return inline_unsafe_CAS(T_INT);
568 case vmIntrinsics::_compareAndSwapLong:
569 return inline_unsafe_CAS(T_LONG);
570
571 case vmIntrinsics::_putOrderedObject:
572 return inline_unsafe_ordered_store(T_OBJECT);
573 case vmIntrinsics::_putOrderedInt:
574 return inline_unsafe_ordered_store(T_INT);
575 case vmIntrinsics::_putOrderedLong:
576 return inline_unsafe_ordered_store(T_LONG);
577
578 case vmIntrinsics::_currentThread:
579 return inline_native_currentThread();
580 case vmIntrinsics::_isInterrupted:
581 return inline_native_isInterrupted();
582
583 case vmIntrinsics::_currentTimeMillis:
584 return inline_native_time_funcs(false);
585 case vmIntrinsics::_nanoTime:
586 return inline_native_time_funcs(true);
587 case vmIntrinsics::_allocateInstance:
588 return inline_unsafe_allocate();
589 case vmIntrinsics::_copyMemory:
590 return inline_unsafe_copyMemory();
591 case vmIntrinsics::_newArray:
592 return inline_native_newArray();
593 case vmIntrinsics::_getLength:
594 return inline_native_getLength();
595 case vmIntrinsics::_copyOf:
596 return inline_array_copyOf(false);
597 case vmIntrinsics::_copyOfRange:
598 return inline_array_copyOf(true);
599 case vmIntrinsics::_equalsC:
600 return inline_array_equals();
601 case vmIntrinsics::_clone:
602 return inline_native_clone(intrinsic()->is_virtual());
603
604 case vmIntrinsics::_isAssignableFrom:
605 return inline_native_subtype_check();
606
607 case vmIntrinsics::_isInstance:
608 case vmIntrinsics::_getModifiers:
609 case vmIntrinsics::_isInterface:
610 case vmIntrinsics::_isArray:
611 case vmIntrinsics::_isPrimitive:
612 case vmIntrinsics::_getSuperclass:
613 case vmIntrinsics::_getComponentType:
614 case vmIntrinsics::_getClassAccessFlags:
615 return inline_native_Class_query(intrinsic_id());
616
617 case vmIntrinsics::_floatToRawIntBits:
618 case vmIntrinsics::_floatToIntBits:
619 case vmIntrinsics::_intBitsToFloat:
620 case vmIntrinsics::_doubleToRawLongBits:
621 case vmIntrinsics::_doubleToLongBits:
622 case vmIntrinsics::_longBitsToDouble:
623 return inline_fp_conversions(intrinsic_id());
624
625 case vmIntrinsics::_numberOfLeadingZeros_i:
626 case vmIntrinsics::_numberOfLeadingZeros_l:
627 return inline_numberOfLeadingZeros(intrinsic_id());
628
629 case vmIntrinsics::_numberOfTrailingZeros_i:
630 case vmIntrinsics::_numberOfTrailingZeros_l:
631 return inline_numberOfTrailingZeros(intrinsic_id());
632
633 case vmIntrinsics::_bitCount_i:
634 case vmIntrinsics::_bitCount_l:
635 return inline_bitCount(intrinsic_id());
636
637 case vmIntrinsics::_reverseBytes_i:
638 case vmIntrinsics::_reverseBytes_l:
639 return inline_reverseBytes((vmIntrinsics::ID) intrinsic_id());
640
641 case vmIntrinsics::_get_AtomicLong:
642 return inline_native_AtomicLong_get();
643 case vmIntrinsics::_attemptUpdate:
644 return inline_native_AtomicLong_attemptUpdate();
645
646 case vmIntrinsics::_getCallerClass:
647 return inline_native_Reflection_getCallerClass();
648
649 default:
650 // If you get here, it may be that someone has added a new intrinsic
651 // to the list in vmSymbols.hpp without implementing it here.
652 #ifndef PRODUCT
653 if ((PrintMiscellaneous && (Verbose || WizardMode)) || PrintOpto) {
654 tty->print_cr("*** Warning: Unimplemented intrinsic %s(%d)",
655 vmIntrinsics::name_at(intrinsic_id()), intrinsic_id());
656 }
657 #endif
658 return false;
659 }
660 }
661
662 //------------------------------push_result------------------------------
663 // Helper function for finishing intrinsics.
664 void LibraryCallKit::push_result(RegionNode* region, PhiNode* value) {
665 record_for_igvn(region);
666 set_control(_gvn.transform(region));
667 BasicType value_type = value->type()->basic_type();
668 push_node(value_type, _gvn.transform(value));
669 }
670
671 //------------------------------generate_guard---------------------------
672 // Helper function for generating guarded fast-slow graph structures.
673 // The given 'test', if true, guards a slow path. If the test fails
674 // then a fast path can be taken. (We generally hope it fails.)
675 // In all cases, GraphKit::control() is updated to the fast path.
676 // The returned value represents the control for the slow path.
677 // The return value is never 'top'; it is either a valid control
678 // or NULL if it is obvious that the slow path can never be taken.
679 // Also, if region and the slow control are not NULL, the slow edge
680 // is appended to the region.
681 Node* LibraryCallKit::generate_guard(Node* test, RegionNode* region, float true_prob) {
682 if (stopped()) {
683 // Already short circuited.
684 return NULL;
685 }
686
687 // Build an if node and its projections.
688 // If test is true we take the slow path, which we assume is uncommon.
689 if (_gvn.type(test) == TypeInt::ZERO) {
690 // The slow branch is never taken. No need to build this guard.
691 return NULL;
692 }
693
694 IfNode* iff = create_and_map_if(control(), test, true_prob, COUNT_UNKNOWN);
695
696 Node* if_slow = _gvn.transform( new (C, 1) IfTrueNode(iff) );
697 if (if_slow == top()) {
698 // The slow branch is never taken. No need to build this guard.
699 return NULL;
700 }
701
702 if (region != NULL)
703 region->add_req(if_slow);
704
705 Node* if_fast = _gvn.transform( new (C, 1) IfFalseNode(iff) );
706 set_control(if_fast);
707
708 return if_slow;
709 }
710
711 inline Node* LibraryCallKit::generate_slow_guard(Node* test, RegionNode* region) {
712 return generate_guard(test, region, PROB_UNLIKELY_MAG(3));
713 }
714 inline Node* LibraryCallKit::generate_fair_guard(Node* test, RegionNode* region) {
715 return generate_guard(test, region, PROB_FAIR);
716 }
717
718 inline Node* LibraryCallKit::generate_negative_guard(Node* index, RegionNode* region,
719 Node* *pos_index) {
720 if (stopped())
721 return NULL; // already stopped
722 if (_gvn.type(index)->higher_equal(TypeInt::POS)) // [0,maxint]
723 return NULL; // index is already adequately typed
724 Node* cmp_lt = _gvn.transform( new (C, 3) CmpINode(index, intcon(0)) );
725 Node* bol_lt = _gvn.transform( new (C, 2) BoolNode(cmp_lt, BoolTest::lt) );
726 Node* is_neg = generate_guard(bol_lt, region, PROB_MIN);
727 if (is_neg != NULL && pos_index != NULL) {
728 // Emulate effect of Parse::adjust_map_after_if.
729 Node* ccast = new (C, 2) CastIINode(index, TypeInt::POS);
730 ccast->set_req(0, control());
731 (*pos_index) = _gvn.transform(ccast);
732 }
733 return is_neg;
734 }
735
736 inline Node* LibraryCallKit::generate_nonpositive_guard(Node* index, bool never_negative,
737 Node* *pos_index) {
738 if (stopped())
739 return NULL; // already stopped
740 if (_gvn.type(index)->higher_equal(TypeInt::POS1)) // [1,maxint]
741 return NULL; // index is already adequately typed
742 Node* cmp_le = _gvn.transform( new (C, 3) CmpINode(index, intcon(0)) );
743 BoolTest::mask le_or_eq = (never_negative ? BoolTest::eq : BoolTest::le);
744 Node* bol_le = _gvn.transform( new (C, 2) BoolNode(cmp_le, le_or_eq) );
745 Node* is_notp = generate_guard(bol_le, NULL, PROB_MIN);
746 if (is_notp != NULL && pos_index != NULL) {
747 // Emulate effect of Parse::adjust_map_after_if.
748 Node* ccast = new (C, 2) CastIINode(index, TypeInt::POS1);
749 ccast->set_req(0, control());
750 (*pos_index) = _gvn.transform(ccast);
751 }
752 return is_notp;
753 }
754
755 // Make sure that 'position' is a valid limit index, in [0..length].
756 // There are two equivalent plans for checking this:
757 // A. (offset + copyLength) unsigned<= arrayLength
758 // B. offset <= (arrayLength - copyLength)
759 // We require that all of the values above, except for the sum and
760 // difference, are already known to be non-negative.
761 // Plan A is robust in the face of overflow, if offset and copyLength
762 // are both hugely positive.
763 //
764 // Plan B is less direct and intuitive, but it does not overflow at
765 // all, since the difference of two non-negatives is always
766 // representable. Whenever Java methods must perform the equivalent
767 // check they generally use Plan B instead of Plan A.
768 // For the moment we use Plan A.
769 inline Node* LibraryCallKit::generate_limit_guard(Node* offset,
770 Node* subseq_length,
771 Node* array_length,
772 RegionNode* region) {
773 if (stopped())
774 return NULL; // already stopped
775 bool zero_offset = _gvn.type(offset) == TypeInt::ZERO;
776 if (zero_offset && _gvn.eqv_uncast(subseq_length, array_length))
777 return NULL; // common case of whole-array copy
778 Node* last = subseq_length;
779 if (!zero_offset) // last += offset
780 last = _gvn.transform( new (C, 3) AddINode(last, offset));
781 Node* cmp_lt = _gvn.transform( new (C, 3) CmpUNode(array_length, last) );
782 Node* bol_lt = _gvn.transform( new (C, 2) BoolNode(cmp_lt, BoolTest::lt) );
783 Node* is_over = generate_guard(bol_lt, region, PROB_MIN);
784 return is_over;
785 }
786
787
788 //--------------------------generate_current_thread--------------------
789 Node* LibraryCallKit::generate_current_thread(Node* &tls_output) {
790 ciKlass* thread_klass = env()->Thread_klass();
791 const Type* thread_type = TypeOopPtr::make_from_klass(thread_klass)->cast_to_ptr_type(TypePtr::NotNull);
792 Node* thread = _gvn.transform(new (C, 1) ThreadLocalNode());
793 Node* p = basic_plus_adr(top()/*!oop*/, thread, in_bytes(JavaThread::threadObj_offset()));
794 Node* threadObj = make_load(NULL, p, thread_type, T_OBJECT);
795 tls_output = thread;
796 return threadObj;
797 }
798
799
800 //------------------------------make_string_method_node------------------------
801 // Helper method for String intrinsic finctions.
802 Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1, Node* cnt1, Node* str2, Node* cnt2) {
803 const int value_offset = java_lang_String::value_offset_in_bytes();
804 const int count_offset = java_lang_String::count_offset_in_bytes();
805 const int offset_offset = java_lang_String::offset_offset_in_bytes();
806
807 Node* no_ctrl = NULL;
808
809 ciInstanceKlass* klass = env()->String_klass();
810 const TypeInstPtr* string_type =
811 TypeInstPtr::make(TypePtr::BotPTR, klass, false, NULL, 0);
812
813 const TypeAryPtr* value_type =
814 TypeAryPtr::make(TypePtr::NotNull,
815 TypeAry::make(TypeInt::CHAR,TypeInt::POS),
816 ciTypeArrayKlass::make(T_CHAR), true, 0);
817
818 // Get start addr of string and substring
819 Node* str1_valuea = basic_plus_adr(str1, str1, value_offset);
820 Node* str1_value = make_load(no_ctrl, str1_valuea, value_type, T_OBJECT, string_type->add_offset(value_offset));
821 Node* str1_offseta = basic_plus_adr(str1, str1, offset_offset);
822 Node* str1_offset = make_load(no_ctrl, str1_offseta, TypeInt::INT, T_INT, string_type->add_offset(offset_offset));
823 Node* str1_start = array_element_address(str1_value, str1_offset, T_CHAR);
824
825 // Pin loads from String::equals() argument since it could be NULL.
826 Node* str2_ctrl = (opcode == Op_StrEquals) ? control() : no_ctrl;
827 Node* str2_valuea = basic_plus_adr(str2, str2, value_offset);
828 Node* str2_value = make_load(str2_ctrl, str2_valuea, value_type, T_OBJECT, string_type->add_offset(value_offset));
829 Node* str2_offseta = basic_plus_adr(str2, str2, offset_offset);
830 Node* str2_offset = make_load(str2_ctrl, str2_offseta, TypeInt::INT, T_INT, string_type->add_offset(offset_offset));
831 Node* str2_start = array_element_address(str2_value, str2_offset, T_CHAR);
832
833 Node* result = NULL;
834 switch (opcode) {
835 case Op_StrIndexOf:
836 result = new (C, 6) StrIndexOfNode(control(), memory(TypeAryPtr::CHARS),
837 str1_start, cnt1, str2_start, cnt2);
838 break;
839 case Op_StrComp:
840 result = new (C, 6) StrCompNode(control(), memory(TypeAryPtr::CHARS),
841 str1_start, cnt1, str2_start, cnt2);
842 break;
843 case Op_StrEquals:
844 result = new (C, 5) StrEqualsNode(control(), memory(TypeAryPtr::CHARS),
845 str1_start, str2_start, cnt1);
846 break;
847 default:
848 ShouldNotReachHere();
849 return NULL;
850 }
851
852 // All these intrinsics have checks.
853 C->set_has_split_ifs(true); // Has chance for split-if optimization
854
855 return _gvn.transform(result);
856 }
857
858 //------------------------------inline_string_compareTo------------------------
859 bool LibraryCallKit::inline_string_compareTo() {
860
861 if (!Matcher::has_match_rule(Op_StrComp)) return false;
862
863 const int value_offset = java_lang_String::value_offset_in_bytes();
864 const int count_offset = java_lang_String::count_offset_in_bytes();
865 const int offset_offset = java_lang_String::offset_offset_in_bytes();
866
867 _sp += 2;
868 Node *argument = pop(); // pop non-receiver first: it was pushed second
869 Node *receiver = pop();
870
871 // Null check on self without removing any arguments. The argument
872 // null check technically happens in the wrong place, which can lead to
873 // invalid stack traces when string compare is inlined into a method
874 // which handles NullPointerExceptions.
875 _sp += 2;
876 receiver = do_null_check(receiver, T_OBJECT);
877 argument = do_null_check(argument, T_OBJECT);
878 _sp -= 2;
879 if (stopped()) {
880 return true;
881 }
882
883 ciInstanceKlass* klass = env()->String_klass();
884 const TypeInstPtr* string_type =
885 TypeInstPtr::make(TypePtr::BotPTR, klass, false, NULL, 0);
886 Node* no_ctrl = NULL;
887
888 // Get counts for string and argument
889 Node* receiver_cnta = basic_plus_adr(receiver, receiver, count_offset);
890 Node* receiver_cnt = make_load(no_ctrl, receiver_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset));
891
892 Node* argument_cnta = basic_plus_adr(argument, argument, count_offset);
893 Node* argument_cnt = make_load(no_ctrl, argument_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset));
894
895 Node* compare = make_string_method_node(Op_StrComp, receiver, receiver_cnt, argument, argument_cnt);
896 push(compare);
897 return true;
898 }
899
900 //------------------------------inline_string_equals------------------------
901 bool LibraryCallKit::inline_string_equals() {
902
903 if (!Matcher::has_match_rule(Op_StrEquals)) return false;
904
905 const int value_offset = java_lang_String::value_offset_in_bytes();
906 const int count_offset = java_lang_String::count_offset_in_bytes();
907 const int offset_offset = java_lang_String::offset_offset_in_bytes();
908
909 _sp += 2;
910 Node* argument = pop(); // pop non-receiver first: it was pushed second
911 Node* receiver = pop();
912
913 // Null check on self without removing any arguments. The argument
914 // null check technically happens in the wrong place, which can lead to
915 // invalid stack traces when string compare is inlined into a method
916 // which handles NullPointerExceptions.
917 _sp += 2;
918 receiver = do_null_check(receiver, T_OBJECT);
919 //should not do null check for argument for String.equals(), because spec
920 //allows to specify NULL as argument.
921 _sp -= 2;
922
923 if (stopped()) {
924 return true;
925 }
926
927 // paths (plus control) merge
928 RegionNode* region = new (C, 5) RegionNode(5);
929 Node* phi = new (C, 5) PhiNode(region, TypeInt::BOOL);
930
931 // does source == target string?
932 Node* cmp = _gvn.transform(new (C, 3) CmpPNode(receiver, argument));
933 Node* bol = _gvn.transform(new (C, 2) BoolNode(cmp, BoolTest::eq));
934
935 Node* if_eq = generate_slow_guard(bol, NULL);
936 if (if_eq != NULL) {
937 // receiver == argument
938 phi->init_req(2, intcon(1));
939 region->init_req(2, if_eq);
940 }
941
942 // get String klass for instanceOf
943 ciInstanceKlass* klass = env()->String_klass();
944
945 if (!stopped()) {
946 Node* inst = gen_instanceof(argument, makecon(TypeKlassPtr::make(klass)));
947 Node* cmp = _gvn.transform(new (C, 3) CmpINode(inst, intcon(1)));
948 Node* bol = _gvn.transform(new (C, 2) BoolNode(cmp, BoolTest::ne));
949
950 Node* inst_false = generate_guard(bol, NULL, PROB_MIN);
951 //instanceOf == true, fallthrough
952
953 if (inst_false != NULL) {
954 phi->init_req(3, intcon(0));
955 region->init_req(3, inst_false);
956 }
957 }
958
959 const TypeInstPtr* string_type =
960 TypeInstPtr::make(TypePtr::BotPTR, klass, false, NULL, 0);
961
962 Node* no_ctrl = NULL;
963 Node* receiver_cnt;
964 Node* argument_cnt;
965
966 if (!stopped()) {
967 // Get counts for string and argument
968 Node* receiver_cnta = basic_plus_adr(receiver, receiver, count_offset);
969 receiver_cnt = make_load(no_ctrl, receiver_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset));
970
971 // Pin load from argument string since it could be NULL.
972 Node* argument_cnta = basic_plus_adr(argument, argument, count_offset);
973 argument_cnt = make_load(control(), argument_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset));
974
975 // Check for receiver count != argument count
976 Node* cmp = _gvn.transform( new(C, 3) CmpINode(receiver_cnt, argument_cnt) );
977 Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::ne) );
978 Node* if_ne = generate_slow_guard(bol, NULL);
979 if (if_ne != NULL) {
980 phi->init_req(4, intcon(0));
981 region->init_req(4, if_ne);
982 }
983 }
984
985 // Check for count == 0 is done by mach node StrEquals.
986
987 if (!stopped()) {
988 Node* equals = make_string_method_node(Op_StrEquals, receiver, receiver_cnt, argument, argument_cnt);
989 phi->init_req(1, equals);
990 region->init_req(1, control());
991 }
992
993 // post merge
994 set_control(_gvn.transform(region));
995 record_for_igvn(region);
996
997 push(_gvn.transform(phi));
998
999 return true;
1000 }
1001
1002 //------------------------------inline_array_equals----------------------------
1003 bool LibraryCallKit::inline_array_equals() {
1004
1005 if (!Matcher::has_match_rule(Op_AryEq)) return false;
1006
1007 _sp += 2;
1008 Node *argument2 = pop();
1009 Node *argument1 = pop();
1010
1011 Node* equals =
1012 _gvn.transform(new (C, 4) AryEqNode(control(), memory(TypeAryPtr::CHARS),
1013 argument1, argument2) );
1014 push(equals);
1015 return true;
1016 }
1017
1018 // Java version of String.indexOf(constant string)
1019 // class StringDecl {
1020 // StringDecl(char[] ca) {
1021 // offset = 0;
1022 // count = ca.length;
1023 // value = ca;
1024 // }
1025 // int offset;
1026 // int count;
1027 // char[] value;
1028 // }
1029 //
1030 // static int string_indexOf_J(StringDecl string_object, char[] target_object,
1031 // int targetOffset, int cache_i, int md2) {
1032 // int cache = cache_i;
1033 // int sourceOffset = string_object.offset;
1034 // int sourceCount = string_object.count;
1035 // int targetCount = target_object.length;
1036 //
1037 // int targetCountLess1 = targetCount - 1;
1038 // int sourceEnd = sourceOffset + sourceCount - targetCountLess1;
1039 //
1040 // char[] source = string_object.value;
1041 // char[] target = target_object;
1042 // int lastChar = target[targetCountLess1];
1043 //
1044 // outer_loop:
1045 // for (int i = sourceOffset; i < sourceEnd; ) {
1046 // int src = source[i + targetCountLess1];
1047 // if (src == lastChar) {
1048 // // With random strings and a 4-character alphabet,
1049 // // reverse matching at this point sets up 0.8% fewer
1050 // // frames, but (paradoxically) makes 0.3% more probes.
1051 // // Since those probes are nearer the lastChar probe,
1052 // // there is may be a net D$ win with reverse matching.
1053 // // But, reversing loop inhibits unroll of inner loop
1054 // // for unknown reason. So, does running outer loop from
1055 // // (sourceOffset - targetCountLess1) to (sourceOffset + sourceCount)
1056 // for (int j = 0; j < targetCountLess1; j++) {
1057 // if (target[targetOffset + j] != source[i+j]) {
1058 // if ((cache & (1 << source[i+j])) == 0) {
1059 // if (md2 < j+1) {
1060 // i += j+1;
1061 // continue outer_loop;
1062 // }
1063 // }
1064 // i += md2;
1065 // continue outer_loop;
1066 // }
1067 // }
1068 // return i - sourceOffset;
1069 // }
1070 // if ((cache & (1 << src)) == 0) {
1071 // i += targetCountLess1;
1072 // } // using "i += targetCount;" and an "else i++;" causes a jump to jump.
1073 // i++;
1074 // }
1075 // return -1;
1076 // }
1077
1078 //------------------------------string_indexOf------------------------
1079 Node* LibraryCallKit::string_indexOf(Node* string_object, ciTypeArray* target_array, jint targetOffset_i,
1080 jint cache_i, jint md2_i) {
1081
1082 Node* no_ctrl = NULL;
1083 float likely = PROB_LIKELY(0.9);
1084 float unlikely = PROB_UNLIKELY(0.9);
1085
1086 const int value_offset = java_lang_String::value_offset_in_bytes();
1087 const int count_offset = java_lang_String::count_offset_in_bytes();
1088 const int offset_offset = java_lang_String::offset_offset_in_bytes();
1089
1090 ciInstanceKlass* klass = env()->String_klass();
1091 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::BotPTR, klass, false, NULL, 0);
1092 const TypeAryPtr* source_type = TypeAryPtr::make(TypePtr::NotNull, TypeAry::make(TypeInt::CHAR,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, 0);
1093
1094 Node* sourceOffseta = basic_plus_adr(string_object, string_object, offset_offset);
1095 Node* sourceOffset = make_load(no_ctrl, sourceOffseta, TypeInt::INT, T_INT, string_type->add_offset(offset_offset));
1096 Node* sourceCounta = basic_plus_adr(string_object, string_object, count_offset);
1097 Node* sourceCount = make_load(no_ctrl, sourceCounta, TypeInt::INT, T_INT, string_type->add_offset(count_offset));
1098 Node* sourcea = basic_plus_adr(string_object, string_object, value_offset);
1099 Node* source = make_load(no_ctrl, sourcea, source_type, T_OBJECT, string_type->add_offset(value_offset));
1100
1101 Node* target = _gvn.transform( makecon(TypeOopPtr::make_from_constant(target_array)) );
1102 jint target_length = target_array->length();
1103 const TypeAry* target_array_type = TypeAry::make(TypeInt::CHAR, TypeInt::make(0, target_length, Type::WidenMin));
1104 const TypeAryPtr* target_type = TypeAryPtr::make(TypePtr::BotPTR, target_array_type, target_array->klass(), true, Type::OffsetBot);
1105
1106 IdealKit kit(gvn(), control(), merged_memory(), false, true);
1107 #define __ kit.
1108 Node* zero = __ ConI(0);
1109 Node* one = __ ConI(1);
1110 Node* cache = __ ConI(cache_i);
1111 Node* md2 = __ ConI(md2_i);
1112 Node* lastChar = __ ConI(target_array->char_at(target_length - 1));
1113 Node* targetCount = __ ConI(target_length);
1114 Node* targetCountLess1 = __ ConI(target_length - 1);
1115 Node* targetOffset = __ ConI(targetOffset_i);
1116 Node* sourceEnd = __ SubI(__ AddI(sourceOffset, sourceCount), targetCountLess1);
1117
1118 IdealVariable rtn(kit), i(kit), j(kit); __ declarations_done();
1119 Node* outer_loop = __ make_label(2 /* goto */);
1120 Node* return_ = __ make_label(1);
1121
1122 __ set(rtn,__ ConI(-1));
1123 __ loop(i, sourceOffset, BoolTest::lt, sourceEnd); {
1124 Node* i2 = __ AddI(__ value(i), targetCountLess1);
1125 // pin to prohibit loading of "next iteration" value which may SEGV (rare)
1126 Node* src = load_array_element(__ ctrl(), source, i2, TypeAryPtr::CHARS);
1127 __ if_then(src, BoolTest::eq, lastChar, unlikely); {
1128 __ loop(j, zero, BoolTest::lt, targetCountLess1); {
1129 Node* tpj = __ AddI(targetOffset, __ value(j));
1130 Node* targ = load_array_element(no_ctrl, target, tpj, target_type);
1131 Node* ipj = __ AddI(__ value(i), __ value(j));
1132 Node* src2 = load_array_element(no_ctrl, source, ipj, TypeAryPtr::CHARS);
1133 __ if_then(targ, BoolTest::ne, src2); {
1134 __ if_then(__ AndI(cache, __ LShiftI(one, src2)), BoolTest::eq, zero); {
1135 __ if_then(md2, BoolTest::lt, __ AddI(__ value(j), one)); {
1136 __ increment(i, __ AddI(__ value(j), one));
1137 __ goto_(outer_loop);
1138 } __ end_if(); __ dead(j);
1139 }__ end_if(); __ dead(j);
1140 __ increment(i, md2);
1141 __ goto_(outer_loop);
1142 }__ end_if();
1143 __ increment(j, one);
1144 }__ end_loop(); __ dead(j);
1145 __ set(rtn, __ SubI(__ value(i), sourceOffset)); __ dead(i);
1146 __ goto_(return_);
1147 }__ end_if();
1148 __ if_then(__ AndI(cache, __ LShiftI(one, src)), BoolTest::eq, zero, likely); {
1149 __ increment(i, targetCountLess1);
1150 }__ end_if();
1151 __ increment(i, one);
1152 __ bind(outer_loop);
1153 }__ end_loop(); __ dead(i);
1154 __ bind(return_);
1155
1156 // Final sync IdealKit and GraphKit.
1157 sync_kit(kit);
1158 Node* result = __ value(rtn);
1159 #undef __
1160 C->set_has_loops(true);
1161 return result;
1162 }
1163
1164 //------------------------------inline_string_indexOf------------------------
1165 bool LibraryCallKit::inline_string_indexOf() {
1166
1167 const int value_offset = java_lang_String::value_offset_in_bytes();
1168 const int count_offset = java_lang_String::count_offset_in_bytes();
1169 const int offset_offset = java_lang_String::offset_offset_in_bytes();
1170
1171 _sp += 2;
1172 Node *argument = pop(); // pop non-receiver first: it was pushed second
1173 Node *receiver = pop();
1174
1175 Node* result;
1176 if (Matcher::has_match_rule(Op_StrIndexOf) &&
1177 UseSSE42Intrinsics) {
1178 // Generate SSE4.2 version of indexOf
1179 // We currently only have match rules that use SSE4.2
1180
1181 // Null check on self without removing any arguments. The argument
1182 // null check technically happens in the wrong place, which can lead to
1183 // invalid stack traces when string compare is inlined into a method
1184 // which handles NullPointerExceptions.
1185 _sp += 2;
1186 receiver = do_null_check(receiver, T_OBJECT);
1187 argument = do_null_check(argument, T_OBJECT);
1188 _sp -= 2;
1189
1190 if (stopped()) {
1191 return true;
1192 }
1193
1194 // Make the merge point
1195 RegionNode* result_rgn = new (C, 3) RegionNode(3);
1196 Node* result_phi = new (C, 3) PhiNode(result_rgn, TypeInt::INT);
1197 Node* no_ctrl = NULL;
1198
1199 ciInstanceKlass* klass = env()->String_klass();
1200 const TypeInstPtr* string_type =
1201 TypeInstPtr::make(TypePtr::BotPTR, klass, false, NULL, 0);
1202
1203 // Get counts for string and substr
1204 Node* source_cnta = basic_plus_adr(receiver, receiver, count_offset);
1205 Node* source_cnt = make_load(no_ctrl, source_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset));
1206
1207 Node* substr_cnta = basic_plus_adr(argument, argument, count_offset);
1208 Node* substr_cnt = make_load(no_ctrl, substr_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset));
1209
1210 // Check for substr count > string count
1211 Node* cmp = _gvn.transform( new(C, 3) CmpINode(substr_cnt, source_cnt) );
1212 Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::gt) );
1213 Node* if_gt = generate_slow_guard(bol, NULL);
1214 if (if_gt != NULL) {
1215 result_phi->init_req(2, intcon(-1));
1216 result_rgn->init_req(2, if_gt);
1217 }
1218
1219 if (!stopped()) {
1220 result = make_string_method_node(Op_StrIndexOf, receiver, source_cnt, argument, substr_cnt);
1221 result_phi->init_req(1, result);
1222 result_rgn->init_req(1, control());
1223 }
1224 set_control(_gvn.transform(result_rgn));
1225 record_for_igvn(result_rgn);
1226 result = _gvn.transform(result_phi);
1227
1228 } else { //Use LibraryCallKit::string_indexOf
1229 // don't intrinsify is argument isn't a constant string.
1230 if (!argument->is_Con()) {
1231 return false;
1232 }
1233 const TypeOopPtr* str_type = _gvn.type(argument)->isa_oopptr();
1234 if (str_type == NULL) {
1235 return false;
1236 }
1237 ciInstanceKlass* klass = env()->String_klass();
1238 ciObject* str_const = str_type->const_oop();
1239 if (str_const == NULL || str_const->klass() != klass) {
1240 return false;
1241 }
1242 ciInstance* str = str_const->as_instance();
1243 assert(str != NULL, "must be instance");
1244
1245 ciObject* v = str->field_value_by_offset(value_offset).as_object();
1246 int o = str->field_value_by_offset(offset_offset).as_int();
1247 int c = str->field_value_by_offset(count_offset).as_int();
1248 ciTypeArray* pat = v->as_type_array(); // pattern (argument) character array
1249
1250 // constant strings have no offset and count == length which
1251 // simplifies the resulting code somewhat so lets optimize for that.
1252 if (o != 0 || c != pat->length()) {
1253 return false;
1254 }
1255
1256 // Null check on self without removing any arguments. The argument
1257 // null check technically happens in the wrong place, which can lead to
1258 // invalid stack traces when string compare is inlined into a method
1259 // which handles NullPointerExceptions.
1260 _sp += 2;
1261 receiver = do_null_check(receiver, T_OBJECT);
1262 // No null check on the argument is needed since it's a constant String oop.
1263 _sp -= 2;
1264 if (stopped()) {
1265 return true;
1266 }
1267
1268 // The null string as a pattern always returns 0 (match at beginning of string)
1269 if (c == 0) {
1270 push(intcon(0));
1271 return true;
1272 }
1273
1274 // Generate default indexOf
1275 jchar lastChar = pat->char_at(o + (c - 1));
1276 int cache = 0;
1277 int i;
1278 for (i = 0; i < c - 1; i++) {
1279 assert(i < pat->length(), "out of range");
1280 cache |= (1 << (pat->char_at(o + i) & (sizeof(cache) * BitsPerByte - 1)));
1281 }
1282
1283 int md2 = c;
1284 for (i = 0; i < c - 1; i++) {
1285 assert(i < pat->length(), "out of range");
1286 if (pat->char_at(o + i) == lastChar) {
1287 md2 = (c - 1) - i;
1288 }
1289 }
1290
1291 result = string_indexOf(receiver, pat, o, cache, md2);
1292 }
1293
1294 push(result);
1295 return true;
1296 }
1297
1298 //--------------------------pop_math_arg--------------------------------
1299 // Pop a double argument to a math function from the stack
1300 // rounding it if necessary.
1301 Node * LibraryCallKit::pop_math_arg() {
1302 Node *arg = pop_pair();
1303 if( Matcher::strict_fp_requires_explicit_rounding && UseSSE<=1 )
1304 arg = _gvn.transform( new (C, 2) RoundDoubleNode(0, arg) );
1305 return arg;
1306 }
1307
1308 //------------------------------inline_trig----------------------------------
1309 // Inline sin/cos/tan instructions, if possible. If rounding is required, do
1310 // argument reduction which will turn into a fast/slow diamond.
1311 bool LibraryCallKit::inline_trig(vmIntrinsics::ID id) {
1312 _sp += arg_size(); // restore stack pointer
1313 Node* arg = pop_math_arg();
1314 Node* trig = NULL;
1315
1316 switch (id) {
1317 case vmIntrinsics::_dsin:
1318 trig = _gvn.transform((Node*)new (C, 2) SinDNode(arg));
1319 break;
1320 case vmIntrinsics::_dcos:
1321 trig = _gvn.transform((Node*)new (C, 2) CosDNode(arg));
1322 break;
1323 case vmIntrinsics::_dtan:
1324 trig = _gvn.transform((Node*)new (C, 2) TanDNode(arg));
1325 break;
1326 default:
1327 assert(false, "bad intrinsic was passed in");
1328 return false;
1329 }
1330
1331 // Rounding required? Check for argument reduction!
1332 if( Matcher::strict_fp_requires_explicit_rounding ) {
1333
1334 static const double pi_4 = 0.7853981633974483;
1335 static const double neg_pi_4 = -0.7853981633974483;
1336 // pi/2 in 80-bit extended precision
1337 // static const unsigned char pi_2_bits_x[] = {0x35,0xc2,0x68,0x21,0xa2,0xda,0x0f,0xc9,0xff,0x3f,0x00,0x00,0x00,0x00,0x00,0x00};
1338 // -pi/2 in 80-bit extended precision
1339 // 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};
1340 // Cutoff value for using this argument reduction technique
1341 //static const double pi_2_minus_epsilon = 1.564660403643354;
1342 //static const double neg_pi_2_plus_epsilon = -1.564660403643354;
1343
1344 // Pseudocode for sin:
1345 // if (x <= Math.PI / 4.0) {
1346 // if (x >= -Math.PI / 4.0) return fsin(x);
1347 // if (x >= -Math.PI / 2.0) return -fcos(x + Math.PI / 2.0);
1348 // } else {
1349 // if (x <= Math.PI / 2.0) return fcos(x - Math.PI / 2.0);
1350 // }
1351 // return StrictMath.sin(x);
1352
1353 // Pseudocode for cos:
1354 // if (x <= Math.PI / 4.0) {
1355 // if (x >= -Math.PI / 4.0) return fcos(x);
1356 // if (x >= -Math.PI / 2.0) return fsin(x + Math.PI / 2.0);
1357 // } else {
1358 // if (x <= Math.PI / 2.0) return -fsin(x - Math.PI / 2.0);
1359 // }
1360 // return StrictMath.cos(x);
1361
1362 // Actually, sticking in an 80-bit Intel value into C2 will be tough; it
1363 // requires a special machine instruction to load it. Instead we'll try
1364 // the 'easy' case. If we really need the extra range +/- PI/2 we'll
1365 // probably do the math inside the SIN encoding.
1366
1367 // Make the merge point
1368 RegionNode *r = new (C, 3) RegionNode(3);
1369 Node *phi = new (C, 3) PhiNode(r,Type::DOUBLE);
1370
1371 // Flatten arg so we need only 1 test
1372 Node *abs = _gvn.transform(new (C, 2) AbsDNode(arg));
1373 // Node for PI/4 constant
1374 Node *pi4 = makecon(TypeD::make(pi_4));
1375 // Check PI/4 : abs(arg)
1376 Node *cmp = _gvn.transform(new (C, 3) CmpDNode(pi4,abs));
1377 // Check: If PI/4 < abs(arg) then go slow
1378 Node *bol = _gvn.transform( new (C, 2) BoolNode( cmp, BoolTest::lt ) );
1379 // Branch either way
1380 IfNode *iff = create_and_xform_if(control(),bol, PROB_STATIC_FREQUENT, COUNT_UNKNOWN);
1381 set_control(opt_iff(r,iff));
1382
1383 // Set fast path result
1384 phi->init_req(2,trig);
1385
1386 // Slow path - non-blocking leaf call
1387 Node* call = NULL;
1388 switch (id) {
1389 case vmIntrinsics::_dsin:
1390 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(),
1391 CAST_FROM_FN_PTR(address, SharedRuntime::dsin),
1392 "Sin", NULL, arg, top());
1393 break;
1394 case vmIntrinsics::_dcos:
1395 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(),
1396 CAST_FROM_FN_PTR(address, SharedRuntime::dcos),
1397 "Cos", NULL, arg, top());
1398 break;
1399 case vmIntrinsics::_dtan:
1400 call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(),
1401 CAST_FROM_FN_PTR(address, SharedRuntime::dtan),
1402 "Tan", NULL, arg, top());
1403 break;
1404 }
1405 assert(control()->in(0) == call, "");
1406 Node* slow_result = _gvn.transform(new (C, 1) ProjNode(call,TypeFunc::Parms));
1407 r->init_req(1,control());
1408 phi->init_req(1,slow_result);
1409
1410 // Post-merge
1411 set_control(_gvn.transform(r));
1412 record_for_igvn(r);
1413 trig = _gvn.transform(phi);
1414
1415 C->set_has_split_ifs(true); // Has chance for split-if optimization
1416 }
1417 // Push result back on JVM stack
1418 push_pair(trig);
1419 return true;
1420 }
1421
1422 //------------------------------inline_sqrt-------------------------------------
1423 // Inline square root instruction, if possible.
1424 bool LibraryCallKit::inline_sqrt(vmIntrinsics::ID id) {
1425 assert(id == vmIntrinsics::_dsqrt, "Not square root");
1426 _sp += arg_size(); // restore stack pointer
1427 push_pair(_gvn.transform(new (C, 2) SqrtDNode(0, pop_math_arg())));
1428 return true;
1429 }
1430
1431 //------------------------------inline_abs-------------------------------------
1432 // Inline absolute value instruction, if possible.
1433 bool LibraryCallKit::inline_abs(vmIntrinsics::ID id) {
1434 assert(id == vmIntrinsics::_dabs, "Not absolute value");
1435 _sp += arg_size(); // restore stack pointer
1436 push_pair(_gvn.transform(new (C, 2) AbsDNode(pop_math_arg())));
1437 return true;
1438 }
1439
1440 //------------------------------inline_exp-------------------------------------
1441 // Inline exp instructions, if possible. The Intel hardware only misses
1442 // really odd corner cases (+/- Infinity). Just uncommon-trap them.
1443 bool LibraryCallKit::inline_exp(vmIntrinsics::ID id) {
1444 assert(id == vmIntrinsics::_dexp, "Not exp");
1445
1446 // If this inlining ever returned NaN in the past, we do not intrinsify it
1447 // every again. NaN results requires StrictMath.exp handling.
1448 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false;
1449
1450 // Do not intrinsify on older platforms which lack cmove.
1451 if (ConditionalMoveLimit == 0) return false;
1452
1453 _sp += arg_size(); // restore stack pointer
1454 Node *x = pop_math_arg();
1455 Node *result = _gvn.transform(new (C, 2) ExpDNode(0,x));
1456
1457 //-------------------
1458 //result=(result.isNaN())? StrictMath::exp():result;
1459 // Check: If isNaN() by checking result!=result? then go to Strict Math
1460 Node* cmpisnan = _gvn.transform(new (C, 3) CmpDNode(result,result));
1461 // Build the boolean node
1462 Node* bolisnum = _gvn.transform( new (C, 2) BoolNode(cmpisnan, BoolTest::eq) );
1463
1464 { BuildCutout unless(this, bolisnum, PROB_STATIC_FREQUENT);
1465 // End the current control-flow path
1466 push_pair(x);
1467 // Math.exp intrinsic returned a NaN, which requires StrictMath.exp
1468 // to handle. Recompile without intrinsifying Math.exp
1469 uncommon_trap(Deoptimization::Reason_intrinsic,
1470 Deoptimization::Action_make_not_entrant);
1471 }
1472
1473 C->set_has_split_ifs(true); // Has chance for split-if optimization
1474
1475 push_pair(result);
1476
1477 return true;
1478 }
1479
1480 //------------------------------inline_pow-------------------------------------
1481 // Inline power instructions, if possible.
1482 bool LibraryCallKit::inline_pow(vmIntrinsics::ID id) {
1483 assert(id == vmIntrinsics::_dpow, "Not pow");
1484
1485 // If this inlining ever returned NaN in the past, we do not intrinsify it
1486 // every again. NaN results requires StrictMath.pow handling.
1487 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false;
1488
1489 // Do not intrinsify on older platforms which lack cmove.
1490 if (ConditionalMoveLimit == 0) return false;
1491
1492 // Pseudocode for pow
1493 // if (x <= 0.0) {
1494 // if ((double)((int)y)==y) { // if y is int
1495 // result = ((1&(int)y)==0)?-DPow(abs(x), y):DPow(abs(x), y)
1496 // } else {
1497 // result = NaN;
1498 // }
1499 // } else {
1500 // result = DPow(x,y);
1501 // }
1502 // if (result != result)? {
1503 // uncommon_trap();
1504 // }
1505 // return result;
1506
1507 _sp += arg_size(); // restore stack pointer
1508 Node* y = pop_math_arg();
1509 Node* x = pop_math_arg();
1510
1511 Node *fast_result = _gvn.transform( new (C, 3) PowDNode(0, x, y) );
1512
1513 // Short form: if not top-level (i.e., Math.pow but inlining Math.pow
1514 // inside of something) then skip the fancy tests and just check for
1515 // NaN result.
1516 Node *result = NULL;
1517 if( jvms()->depth() >= 1 ) {
1518 result = fast_result;
1519 } else {
1520
1521 // Set the merge point for If node with condition of (x <= 0.0)
1522 // There are four possible paths to region node and phi node
1523 RegionNode *r = new (C, 4) RegionNode(4);
1524 Node *phi = new (C, 4) PhiNode(r, Type::DOUBLE);
1525
1526 // Build the first if node: if (x <= 0.0)
1527 // Node for 0 constant
1528 Node *zeronode = makecon(TypeD::ZERO);
1529 // Check x:0
1530 Node *cmp = _gvn.transform(new (C, 3) CmpDNode(x, zeronode));
1531 // Check: If (x<=0) then go complex path
1532 Node *bol1 = _gvn.transform( new (C, 2) BoolNode( cmp, BoolTest::le ) );
1533 // Branch either way
1534 IfNode *if1 = create_and_xform_if(control(),bol1, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN);
1535 Node *opt_test = _gvn.transform(if1);
1536 //assert( opt_test->is_If(), "Expect an IfNode");
1537 IfNode *opt_if1 = (IfNode*)opt_test;
1538 // Fast path taken; set region slot 3
1539 Node *fast_taken = _gvn.transform( new (C, 1) IfFalseNode(opt_if1) );
1540 r->init_req(3,fast_taken); // Capture fast-control
1541
1542 // Fast path not-taken, i.e. slow path
1543 Node *complex_path = _gvn.transform( new (C, 1) IfTrueNode(opt_if1) );
1544
1545 // Set fast path result
1546 Node *fast_result = _gvn.transform( new (C, 3) PowDNode(0, y, x) );
1547 phi->init_req(3, fast_result);
1548
1549 // Complex path
1550 // Build the second if node (if y is int)
1551 // Node for (int)y
1552 Node *inty = _gvn.transform( new (C, 2) ConvD2INode(y));
1553 // Node for (double)((int) y)
1554 Node *doubleinty= _gvn.transform( new (C, 2) ConvI2DNode(inty));
1555 // Check (double)((int) y) : y
1556 Node *cmpinty= _gvn.transform(new (C, 3) CmpDNode(doubleinty, y));
1557 // Check if (y isn't int) then go to slow path
1558
1559 Node *bol2 = _gvn.transform( new (C, 2) BoolNode( cmpinty, BoolTest::ne ) );
1560 // Branch either way
1561 IfNode *if2 = create_and_xform_if(complex_path,bol2, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN);
1562 Node *slow_path = opt_iff(r,if2); // Set region path 2
1563
1564 // Calculate DPow(abs(x), y)*(1 & (int)y)
1565 // Node for constant 1
1566 Node *conone = intcon(1);
1567 // 1& (int)y
1568 Node *signnode= _gvn.transform( new (C, 3) AndINode(conone, inty) );
1569 // zero node
1570 Node *conzero = intcon(0);
1571 // Check (1&(int)y)==0?
1572 Node *cmpeq1 = _gvn.transform(new (C, 3) CmpINode(signnode, conzero));
1573 // Check if (1&(int)y)!=0?, if so the result is negative
1574 Node *bol3 = _gvn.transform( new (C, 2) BoolNode( cmpeq1, BoolTest::ne ) );
1575 // abs(x)
1576 Node *absx=_gvn.transform( new (C, 2) AbsDNode(x));
1577 // abs(x)^y
1578 Node *absxpowy = _gvn.transform( new (C, 3) PowDNode(0, y, absx) );
1579 // -abs(x)^y
1580 Node *negabsxpowy = _gvn.transform(new (C, 2) NegDNode (absxpowy));
1581 // (1&(int)y)==1?-DPow(abs(x), y):DPow(abs(x), y)
1582 Node *signresult = _gvn.transform( CMoveNode::make(C, NULL, bol3, absxpowy, negabsxpowy, Type::DOUBLE));
1583 // Set complex path fast result
1584 phi->init_req(2, signresult);
1585
1586 static const jlong nan_bits = CONST64(0x7ff8000000000000);
1587 Node *slow_result = makecon(TypeD::make(*(double*)&nan_bits)); // return NaN
1588 r->init_req(1,slow_path);
1589 phi->init_req(1,slow_result);
1590
1591 // Post merge
1592 set_control(_gvn.transform(r));
1593 record_for_igvn(r);
1594 result=_gvn.transform(phi);
1595 }
1596
1597 //-------------------
1598 //result=(result.isNaN())? uncommon_trap():result;
1599 // Check: If isNaN() by checking result!=result? then go to Strict Math
1600 Node* cmpisnan = _gvn.transform(new (C, 3) CmpDNode(result,result));
1601 // Build the boolean node
1602 Node* bolisnum = _gvn.transform( new (C, 2) BoolNode(cmpisnan, BoolTest::eq) );
1603
1604 { BuildCutout unless(this, bolisnum, PROB_STATIC_FREQUENT);
1605 // End the current control-flow path
1606 push_pair(x);
1607 push_pair(y);
1608 // Math.pow intrinsic returned a NaN, which requires StrictMath.pow
1609 // to handle. Recompile without intrinsifying Math.pow.
1610 uncommon_trap(Deoptimization::Reason_intrinsic,
1611 Deoptimization::Action_make_not_entrant);
1612 }
1613
1614 C->set_has_split_ifs(true); // Has chance for split-if optimization
1615
1616 push_pair(result);
1617
1618 return true;
1619 }
1620
1621 //------------------------------inline_trans-------------------------------------
1622 // Inline transcendental instructions, if possible. The Intel hardware gets
1623 // these right, no funny corner cases missed.
1624 bool LibraryCallKit::inline_trans(vmIntrinsics::ID id) {
1625 _sp += arg_size(); // restore stack pointer
1626 Node* arg = pop_math_arg();
1627 Node* trans = NULL;
1628
1629 switch (id) {
1630 case vmIntrinsics::_dlog:
1631 trans = _gvn.transform((Node*)new (C, 2) LogDNode(arg));
1632 break;
1633 case vmIntrinsics::_dlog10:
1634 trans = _gvn.transform((Node*)new (C, 2) Log10DNode(arg));
1635 break;
1636 default:
1637 assert(false, "bad intrinsic was passed in");
1638 return false;
1639 }
1640
1641 // Push result back on JVM stack
1642 push_pair(trans);
1643 return true;
1644 }
1645
1646 //------------------------------runtime_math-----------------------------
1647 bool LibraryCallKit::runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName) {
1648 Node* a = NULL;
1649 Node* b = NULL;
1650
1651 assert(call_type == OptoRuntime::Math_DD_D_Type() || call_type == OptoRuntime::Math_D_D_Type(),
1652 "must be (DD)D or (D)D type");
1653
1654 // Inputs
1655 _sp += arg_size(); // restore stack pointer
1656 if (call_type == OptoRuntime::Math_DD_D_Type()) {
1657 b = pop_math_arg();
1658 }
1659 a = pop_math_arg();
1660
1661 const TypePtr* no_memory_effects = NULL;
1662 Node* trig = make_runtime_call(RC_LEAF, call_type, funcAddr, funcName,
1663 no_memory_effects,
1664 a, top(), b, b ? top() : NULL);
1665 Node* value = _gvn.transform(new (C, 1) ProjNode(trig, TypeFunc::Parms+0));
1666 #ifdef ASSERT
1667 Node* value_top = _gvn.transform(new (C, 1) ProjNode(trig, TypeFunc::Parms+1));
1668 assert(value_top == top(), "second value must be top");
1669 #endif
1670
1671 push_pair(value);
1672 return true;
1673 }
1674
1675 //------------------------------inline_math_native-----------------------------
1676 bool LibraryCallKit::inline_math_native(vmIntrinsics::ID id) {
1677 switch (id) {
1678 // These intrinsics are not properly supported on all hardware
1679 case vmIntrinsics::_dcos: return Matcher::has_match_rule(Op_CosD) ? inline_trig(id) :
1680 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dcos), "COS");
1681 case vmIntrinsics::_dsin: return Matcher::has_match_rule(Op_SinD) ? inline_trig(id) :
1682 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dsin), "SIN");
1683 case vmIntrinsics::_dtan: return Matcher::has_match_rule(Op_TanD) ? inline_trig(id) :
1684 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dtan), "TAN");
1685
1686 case vmIntrinsics::_dlog: return Matcher::has_match_rule(Op_LogD) ? inline_trans(id) :
1687 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dlog), "LOG");
1688 case vmIntrinsics::_dlog10: return Matcher::has_match_rule(Op_Log10D) ? inline_trans(id) :
1689 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dlog10), "LOG10");
1690
1691 // These intrinsics are supported on all hardware
1692 case vmIntrinsics::_dsqrt: return Matcher::has_match_rule(Op_SqrtD) ? inline_sqrt(id) : false;
1693 case vmIntrinsics::_dabs: return Matcher::has_match_rule(Op_AbsD) ? inline_abs(id) : false;
1694
1695 // These intrinsics don't work on X86. The ad implementation doesn't
1696 // handle NaN's properly. Instead of returning infinity, the ad
1697 // implementation returns a NaN on overflow. See bug: 6304089
1698 // Once the ad implementations are fixed, change the code below
1699 // to match the intrinsics above
1700
1701 case vmIntrinsics::_dexp: return
1702 runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dexp), "EXP");
1703 case vmIntrinsics::_dpow: return
1704 runtime_math(OptoRuntime::Math_DD_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dpow), "POW");
1705
1706 // These intrinsics are not yet correctly implemented
1707 case vmIntrinsics::_datan2:
1708 return false;
1709
1710 default:
1711 ShouldNotReachHere();
1712 return false;
1713 }
1714 }
1715
1716 static bool is_simple_name(Node* n) {
1717 return (n->req() == 1 // constant
1718 || (n->is_Type() && n->as_Type()->type()->singleton())
1719 || n->is_Proj() // parameter or return value
1720 || n->is_Phi() // local of some sort
1721 );
1722 }
1723
1724 //----------------------------inline_min_max-----------------------------------
1725 bool LibraryCallKit::inline_min_max(vmIntrinsics::ID id) {
1726 push(generate_min_max(id, argument(0), argument(1)));
1727
1728 return true;
1729 }
1730
1731 Node*
1732 LibraryCallKit::generate_min_max(vmIntrinsics::ID id, Node* x0, Node* y0) {
1733 // These are the candidate return value:
1734 Node* xvalue = x0;
1735 Node* yvalue = y0;
1736
1737 if (xvalue == yvalue) {
1738 return xvalue;
1739 }
1740
1741 bool want_max = (id == vmIntrinsics::_max);
1742
1743 const TypeInt* txvalue = _gvn.type(xvalue)->isa_int();
1744 const TypeInt* tyvalue = _gvn.type(yvalue)->isa_int();
1745 if (txvalue == NULL || tyvalue == NULL) return top();
1746 // This is not really necessary, but it is consistent with a
1747 // hypothetical MaxINode::Value method:
1748 int widen = MAX2(txvalue->_widen, tyvalue->_widen);
1749
1750 // %%% This folding logic should (ideally) be in a different place.
1751 // Some should be inside IfNode, and there to be a more reliable
1752 // transformation of ?: style patterns into cmoves. We also want
1753 // more powerful optimizations around cmove and min/max.
1754
1755 // Try to find a dominating comparison of these guys.
1756 // It can simplify the index computation for Arrays.copyOf
1757 // and similar uses of System.arraycopy.
1758 // First, compute the normalized version of CmpI(x, y).
1759 int cmp_op = Op_CmpI;
1760 Node* xkey = xvalue;
1761 Node* ykey = yvalue;
1762 Node* ideal_cmpxy = _gvn.transform( new(C, 3) CmpINode(xkey, ykey) );
1763 if (ideal_cmpxy->is_Cmp()) {
1764 // E.g., if we have CmpI(length - offset, count),
1765 // it might idealize to CmpI(length, count + offset)
1766 cmp_op = ideal_cmpxy->Opcode();
1767 xkey = ideal_cmpxy->in(1);
1768 ykey = ideal_cmpxy->in(2);
1769 }
1770
1771 // Start by locating any relevant comparisons.
1772 Node* start_from = (xkey->outcnt() < ykey->outcnt()) ? xkey : ykey;
1773 Node* cmpxy = NULL;
1774 Node* cmpyx = NULL;
1775 for (DUIterator_Fast kmax, k = start_from->fast_outs(kmax); k < kmax; k++) {
1776 Node* cmp = start_from->fast_out(k);
1777 if (cmp->outcnt() > 0 && // must have prior uses
1778 cmp->in(0) == NULL && // must be context-independent
1779 cmp->Opcode() == cmp_op) { // right kind of compare
1780 if (cmp->in(1) == xkey && cmp->in(2) == ykey) cmpxy = cmp;
1781 if (cmp->in(1) == ykey && cmp->in(2) == xkey) cmpyx = cmp;
1782 }
1783 }
1784
1785 const int NCMPS = 2;
1786 Node* cmps[NCMPS] = { cmpxy, cmpyx };
1787 int cmpn;
1788 for (cmpn = 0; cmpn < NCMPS; cmpn++) {
1789 if (cmps[cmpn] != NULL) break; // find a result
1790 }
1791 if (cmpn < NCMPS) {
1792 // Look for a dominating test that tells us the min and max.
1793 int depth = 0; // Limit search depth for speed
1794 Node* dom = control();
1795 for (; dom != NULL; dom = IfNode::up_one_dom(dom, true)) {
1796 if (++depth >= 100) break;
1797 Node* ifproj = dom;
1798 if (!ifproj->is_Proj()) continue;
1799 Node* iff = ifproj->in(0);
1800 if (!iff->is_If()) continue;
1801 Node* bol = iff->in(1);
1802 if (!bol->is_Bool()) continue;
1803 Node* cmp = bol->in(1);
1804 if (cmp == NULL) continue;
1805 for (cmpn = 0; cmpn < NCMPS; cmpn++)
1806 if (cmps[cmpn] == cmp) break;
1807 if (cmpn == NCMPS) continue;
1808 BoolTest::mask btest = bol->as_Bool()->_test._test;
1809 if (ifproj->is_IfFalse()) btest = BoolTest(btest).negate();
1810 if (cmp->in(1) == ykey) btest = BoolTest(btest).commute();
1811 // At this point, we know that 'x btest y' is true.
1812 switch (btest) {
1813 case BoolTest::eq:
1814 // They are proven equal, so we can collapse the min/max.
1815 // Either value is the answer. Choose the simpler.
1816 if (is_simple_name(yvalue) && !is_simple_name(xvalue))
1817 return yvalue;
1818 return xvalue;
1819 case BoolTest::lt: // x < y
1820 case BoolTest::le: // x <= y
1821 return (want_max ? yvalue : xvalue);
1822 case BoolTest::gt: // x > y
1823 case BoolTest::ge: // x >= y
1824 return (want_max ? xvalue : yvalue);
1825 }
1826 }
1827 }
1828
1829 // We failed to find a dominating test.
1830 // Let's pick a test that might GVN with prior tests.
1831 Node* best_bol = NULL;
1832 BoolTest::mask best_btest = BoolTest::illegal;
1833 for (cmpn = 0; cmpn < NCMPS; cmpn++) {
1834 Node* cmp = cmps[cmpn];
1835 if (cmp == NULL) continue;
1836 for (DUIterator_Fast jmax, j = cmp->fast_outs(jmax); j < jmax; j++) {
1837 Node* bol = cmp->fast_out(j);
1838 if (!bol->is_Bool()) continue;
1839 BoolTest::mask btest = bol->as_Bool()->_test._test;
1840 if (btest == BoolTest::eq || btest == BoolTest::ne) continue;
1841 if (cmp->in(1) == ykey) btest = BoolTest(btest).commute();
1842 if (bol->outcnt() > (best_bol == NULL ? 0 : best_bol->outcnt())) {
1843 best_bol = bol->as_Bool();
1844 best_btest = btest;
1845 }
1846 }
1847 }
1848
1849 Node* answer_if_true = NULL;
1850 Node* answer_if_false = NULL;
1851 switch (best_btest) {
1852 default:
1853 if (cmpxy == NULL)
1854 cmpxy = ideal_cmpxy;
1855 best_bol = _gvn.transform( new(C, 2) BoolNode(cmpxy, BoolTest::lt) );
1856 // and fall through:
1857 case BoolTest::lt: // x < y
1858 case BoolTest::le: // x <= y
1859 answer_if_true = (want_max ? yvalue : xvalue);
1860 answer_if_false = (want_max ? xvalue : yvalue);
1861 break;
1862 case BoolTest::gt: // x > y
1863 case BoolTest::ge: // x >= y
1864 answer_if_true = (want_max ? xvalue : yvalue);
1865 answer_if_false = (want_max ? yvalue : xvalue);
1866 break;
1867 }
1868
1869 jint hi, lo;
1870 if (want_max) {
1871 // We can sharpen the minimum.
1872 hi = MAX2(txvalue->_hi, tyvalue->_hi);
1873 lo = MAX2(txvalue->_lo, tyvalue->_lo);
1874 } else {
1875 // We can sharpen the maximum.
1876 hi = MIN2(txvalue->_hi, tyvalue->_hi);
1877 lo = MIN2(txvalue->_lo, tyvalue->_lo);
1878 }
1879
1880 // Use a flow-free graph structure, to avoid creating excess control edges
1881 // which could hinder other optimizations.
1882 // Since Math.min/max is often used with arraycopy, we want
1883 // tightly_coupled_allocation to be able to see beyond min/max expressions.
1884 Node* cmov = CMoveNode::make(C, NULL, best_bol,
1885 answer_if_false, answer_if_true,
1886 TypeInt::make(lo, hi, widen));
1887
1888 return _gvn.transform(cmov);
1889
1890 /*
1891 // This is not as desirable as it may seem, since Min and Max
1892 // nodes do not have a full set of optimizations.
1893 // And they would interfere, anyway, with 'if' optimizations
1894 // and with CMoveI canonical forms.
1895 switch (id) {
1896 case vmIntrinsics::_min:
1897 result_val = _gvn.transform(new (C, 3) MinINode(x,y)); break;
1898 case vmIntrinsics::_max:
1899 result_val = _gvn.transform(new (C, 3) MaxINode(x,y)); break;
1900 default:
1901 ShouldNotReachHere();
1902 }
1903 */
1904 }
1905
1906 inline int
1907 LibraryCallKit::classify_unsafe_addr(Node* &base, Node* &offset) {
1908 const TypePtr* base_type = TypePtr::NULL_PTR;
1909 if (base != NULL) base_type = _gvn.type(base)->isa_ptr();
1910 if (base_type == NULL) {
1911 // Unknown type.
1912 return Type::AnyPtr;
1913 } else if (base_type == TypePtr::NULL_PTR) {
1914 // Since this is a NULL+long form, we have to switch to a rawptr.
1915 base = _gvn.transform( new (C, 2) CastX2PNode(offset) );
1916 offset = MakeConX(0);
1917 return Type::RawPtr;
1918 } else if (base_type->base() == Type::RawPtr) {
1919 return Type::RawPtr;
1920 } else if (base_type->isa_oopptr()) {
1921 // Base is never null => always a heap address.
1922 if (base_type->ptr() == TypePtr::NotNull) {
1923 return Type::OopPtr;
1924 }
1925 // Offset is small => always a heap address.
1926 const TypeX* offset_type = _gvn.type(offset)->isa_intptr_t();
1927 if (offset_type != NULL &&
1928 base_type->offset() == 0 && // (should always be?)
1929 offset_type->_lo >= 0 &&
1930 !MacroAssembler::needs_explicit_null_check(offset_type->_hi)) {
1931 return Type::OopPtr;
1932 }
1933 // Otherwise, it might either be oop+off or NULL+addr.
1934 return Type::AnyPtr;
1935 } else {
1936 // No information:
1937 return Type::AnyPtr;
1938 }
1939 }
1940
1941 inline Node* LibraryCallKit::make_unsafe_address(Node* base, Node* offset) {
1942 int kind = classify_unsafe_addr(base, offset);
1943 if (kind == Type::RawPtr) {
1944 return basic_plus_adr(top(), base, offset);
1945 } else {
1946 return basic_plus_adr(base, offset);
1947 }
1948 }
1949
1950 //-------------------inline_numberOfLeadingZeros_int/long-----------------------
1951 // inline int Integer.numberOfLeadingZeros(int)
1952 // inline int Long.numberOfLeadingZeros(long)
1953 bool LibraryCallKit::inline_numberOfLeadingZeros(vmIntrinsics::ID id) {
1954 assert(id == vmIntrinsics::_numberOfLeadingZeros_i || id == vmIntrinsics::_numberOfLeadingZeros_l, "not numberOfLeadingZeros");
1955 if (id == vmIntrinsics::_numberOfLeadingZeros_i && !Matcher::match_rule_supported(Op_CountLeadingZerosI)) return false;
1956 if (id == vmIntrinsics::_numberOfLeadingZeros_l && !Matcher::match_rule_supported(Op_CountLeadingZerosL)) return false;
1957 _sp += arg_size(); // restore stack pointer
1958 switch (id) {
1959 case vmIntrinsics::_numberOfLeadingZeros_i:
1960 push(_gvn.transform(new (C, 2) CountLeadingZerosINode(pop())));
1961 break;
1962 case vmIntrinsics::_numberOfLeadingZeros_l:
1963 push(_gvn.transform(new (C, 2) CountLeadingZerosLNode(pop_pair())));
1964 break;
1965 default:
1966 ShouldNotReachHere();
1967 }
1968 return true;
1969 }
1970
1971 //-------------------inline_numberOfTrailingZeros_int/long----------------------
1972 // inline int Integer.numberOfTrailingZeros(int)
1973 // inline int Long.numberOfTrailingZeros(long)
1974 bool LibraryCallKit::inline_numberOfTrailingZeros(vmIntrinsics::ID id) {
1975 assert(id == vmIntrinsics::_numberOfTrailingZeros_i || id == vmIntrinsics::_numberOfTrailingZeros_l, "not numberOfTrailingZeros");
1976 if (id == vmIntrinsics::_numberOfTrailingZeros_i && !Matcher::match_rule_supported(Op_CountTrailingZerosI)) return false;
1977 if (id == vmIntrinsics::_numberOfTrailingZeros_l && !Matcher::match_rule_supported(Op_CountTrailingZerosL)) return false;
1978 _sp += arg_size(); // restore stack pointer
1979 switch (id) {
1980 case vmIntrinsics::_numberOfTrailingZeros_i:
1981 push(_gvn.transform(new (C, 2) CountTrailingZerosINode(pop())));
1982 break;
1983 case vmIntrinsics::_numberOfTrailingZeros_l:
1984 push(_gvn.transform(new (C, 2) CountTrailingZerosLNode(pop_pair())));
1985 break;
1986 default:
1987 ShouldNotReachHere();
1988 }
1989 return true;
1990 }
1991
1992 //----------------------------inline_bitCount_int/long-----------------------
1993 // inline int Integer.bitCount(int)
1994 // inline int Long.bitCount(long)
1995 bool LibraryCallKit::inline_bitCount(vmIntrinsics::ID id) {
1996 assert(id == vmIntrinsics::_bitCount_i || id == vmIntrinsics::_bitCount_l, "not bitCount");
1997 if (id == vmIntrinsics::_bitCount_i && !Matcher::has_match_rule(Op_PopCountI)) return false;
1998 if (id == vmIntrinsics::_bitCount_l && !Matcher::has_match_rule(Op_PopCountL)) return false;
1999 _sp += arg_size(); // restore stack pointer
2000 switch (id) {
2001 case vmIntrinsics::_bitCount_i:
2002 push(_gvn.transform(new (C, 2) PopCountINode(pop())));
2003 break;
2004 case vmIntrinsics::_bitCount_l:
2005 push(_gvn.transform(new (C, 2) PopCountLNode(pop_pair())));
2006 break;
2007 default:
2008 ShouldNotReachHere();
2009 }
2010 return true;
2011 }
2012
2013 //----------------------------inline_reverseBytes_int/long-------------------
2014 // inline Integer.reverseBytes(int)
2015 // inline Long.reverseBytes(long)
2016 bool LibraryCallKit::inline_reverseBytes(vmIntrinsics::ID id) {
2017 assert(id == vmIntrinsics::_reverseBytes_i || id == vmIntrinsics::_reverseBytes_l, "not reverse Bytes");
2018 if (id == vmIntrinsics::_reverseBytes_i && !Matcher::has_match_rule(Op_ReverseBytesI)) return false;
2019 if (id == vmIntrinsics::_reverseBytes_l && !Matcher::has_match_rule(Op_ReverseBytesL)) return false;
2020 _sp += arg_size(); // restore stack pointer
2021 switch (id) {
2022 case vmIntrinsics::_reverseBytes_i:
2023 push(_gvn.transform(new (C, 2) ReverseBytesINode(0, pop())));
2024 break;
2025 case vmIntrinsics::_reverseBytes_l:
2026 push_pair(_gvn.transform(new (C, 2) ReverseBytesLNode(0, pop_pair())));
2027 break;
2028 default:
2029 ;
2030 }
2031 return true;
2032 }
2033
2034 //----------------------------inline_unsafe_access----------------------------
2035
2036 const static BasicType T_ADDRESS_HOLDER = T_LONG;
2037
2038 // Interpret Unsafe.fieldOffset cookies correctly:
2039 extern jlong Unsafe_field_offset_to_byte_offset(jlong field_offset);
2040
2041 bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile) {
2042 if (callee()->is_static()) return false; // caller must have the capability!
2043
2044 #ifndef PRODUCT
2045 {
2046 ResourceMark rm;
2047 // Check the signatures.
2048 ciSignature* sig = signature();
2049 #ifdef ASSERT
2050 if (!is_store) {
2051 // Object getObject(Object base, int/long offset), etc.
2052 BasicType rtype = sig->return_type()->basic_type();
2053 if (rtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::getAddress_name())
2054 rtype = T_ADDRESS; // it is really a C void*
2055 assert(rtype == type, "getter must return the expected value");
2056 if (!is_native_ptr) {
2057 assert(sig->count() == 2, "oop getter has 2 arguments");
2058 assert(sig->type_at(0)->basic_type() == T_OBJECT, "getter base is object");
2059 assert(sig->type_at(1)->basic_type() == T_LONG, "getter offset is correct");
2060 } else {
2061 assert(sig->count() == 1, "native getter has 1 argument");
2062 assert(sig->type_at(0)->basic_type() == T_LONG, "getter base is long");
2063 }
2064 } else {
2065 // void putObject(Object base, int/long offset, Object x), etc.
2066 assert(sig->return_type()->basic_type() == T_VOID, "putter must not return a value");
2067 if (!is_native_ptr) {
2068 assert(sig->count() == 3, "oop putter has 3 arguments");
2069 assert(sig->type_at(0)->basic_type() == T_OBJECT, "putter base is object");
2070 assert(sig->type_at(1)->basic_type() == T_LONG, "putter offset is correct");
2071 } else {
2072 assert(sig->count() == 2, "native putter has 2 arguments");
2073 assert(sig->type_at(0)->basic_type() == T_LONG, "putter base is long");
2074 }
2075 BasicType vtype = sig->type_at(sig->count()-1)->basic_type();
2076 if (vtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::putAddress_name())
2077 vtype = T_ADDRESS; // it is really a C void*
2078 assert(vtype == type, "putter must accept the expected value");
2079 }
2080 #endif // ASSERT
2081 }
2082 #endif //PRODUCT
2083
2084 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe".
2085
2086 int type_words = type2size[ (type == T_ADDRESS) ? T_LONG : type ];
2087
2088 // Argument words: "this" plus (oop/offset) or (lo/hi) args plus maybe 1 or 2 value words
2089 int nargs = 1 + (is_native_ptr ? 2 : 3) + (is_store ? type_words : 0);
2090
2091 debug_only(int saved_sp = _sp);
2092 _sp += nargs;
2093
2094 Node* val;
2095 debug_only(val = (Node*)(uintptr_t)-1);
2096
2097
2098 if (is_store) {
2099 // Get the value being stored. (Pop it first; it was pushed last.)
2100 switch (type) {
2101 case T_DOUBLE:
2102 case T_LONG:
2103 case T_ADDRESS:
2104 val = pop_pair();
2105 break;
2106 default:
2107 val = pop();
2108 }
2109 }
2110
2111 // Build address expression. See the code in inline_unsafe_prefetch.
2112 Node *adr;
2113 Node *heap_base_oop = top();
2114 if (!is_native_ptr) {
2115 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset
2116 Node* offset = pop_pair();
2117 // The base is either a Java object or a value produced by Unsafe.staticFieldBase
2118 Node* base = pop();
2119 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset
2120 // to be plain byte offsets, which are also the same as those accepted
2121 // by oopDesc::field_base.
2122 assert(Unsafe_field_offset_to_byte_offset(11) == 11,
2123 "fieldOffset must be byte-scaled");
2124 // 32-bit machines ignore the high half!
2125 offset = ConvL2X(offset);
2126 adr = make_unsafe_address(base, offset);
2127 heap_base_oop = base;
2128 } else {
2129 Node* ptr = pop_pair();
2130 // Adjust Java long to machine word:
2131 ptr = ConvL2X(ptr);
2132 adr = make_unsafe_address(NULL, ptr);
2133 }
2134
2135 // Pop receiver last: it was pushed first.
2136 Node *receiver = pop();
2137
2138 assert(saved_sp == _sp, "must have correct argument count");
2139
2140 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr();
2141
2142 // First guess at the value type.
2143 const Type *value_type = Type::get_const_basic_type(type);
2144
2145 // Try to categorize the address. If it comes up as TypeJavaPtr::BOTTOM,
2146 // there was not enough information to nail it down.
2147 Compile::AliasType* alias_type = C->alias_type(adr_type);
2148 assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here");
2149
2150 // We will need memory barriers unless we can determine a unique
2151 // alias category for this reference. (Note: If for some reason
2152 // the barriers get omitted and the unsafe reference begins to "pollute"
2153 // the alias analysis of the rest of the graph, either Compile::can_alias
2154 // or Compile::must_alias will throw a diagnostic assert.)
2155 bool need_mem_bar = (alias_type->adr_type() == TypeOopPtr::BOTTOM);
2156
2157 if (!is_store && type == T_OBJECT) {
2158 // Attempt to infer a sharper value type from the offset and base type.
2159 ciKlass* sharpened_klass = NULL;
2160
2161 // See if it is an instance field, with an object type.
2162 if (alias_type->field() != NULL) {
2163 assert(!is_native_ptr, "native pointer op cannot use a java address");
2164 if (alias_type->field()->type()->is_klass()) {
2165 sharpened_klass = alias_type->field()->type()->as_klass();
2166 }
2167 }
2168
2169 // See if it is a narrow oop array.
2170 if (adr_type->isa_aryptr()) {
2171 if (adr_type->offset() >= objArrayOopDesc::base_offset_in_bytes()) {
2172 const TypeOopPtr *elem_type = adr_type->is_aryptr()->elem()->isa_oopptr();
2173 if (elem_type != NULL) {
2174 sharpened_klass = elem_type->klass();
2175 }
2176 }
2177 }
2178
2179 if (sharpened_klass != NULL) {
2180 const TypeOopPtr* tjp = TypeOopPtr::make_from_klass(sharpened_klass);
2181
2182 // Sharpen the value type.
2183 value_type = tjp;
2184
2185 #ifndef PRODUCT
2186 if (PrintIntrinsics || PrintInlining || PrintOptoInlining) {
2187 tty->print(" from base type: "); adr_type->dump();
2188 tty->print(" sharpened value: "); value_type->dump();
2189 }
2190 #endif
2191 }
2192 }
2193
2194 // Null check on self without removing any arguments. The argument
2195 // null check technically happens in the wrong place, which can lead to
2196 // invalid stack traces when the primitive is inlined into a method
2197 // which handles NullPointerExceptions.
2198 _sp += nargs;
2199 do_null_check(receiver, T_OBJECT);
2200 _sp -= nargs;
2201 if (stopped()) {
2202 return true;
2203 }
2204 // Heap pointers get a null-check from the interpreter,
2205 // as a courtesy. However, this is not guaranteed by Unsafe,
2206 // and it is not possible to fully distinguish unintended nulls
2207 // from intended ones in this API.
2208
2209 if (is_volatile) {
2210 // We need to emit leading and trailing CPU membars (see below) in
2211 // addition to memory membars when is_volatile. This is a little
2212 // too strong, but avoids the need to insert per-alias-type
2213 // volatile membars (for stores; compare Parse::do_put_xxx), which
2214 // we cannot do effectively here because we probably only have a
2215 // rough approximation of type.
2216 need_mem_bar = true;
2217 // For Stores, place a memory ordering barrier now.
2218 if (is_store)
2219 insert_mem_bar(Op_MemBarRelease);
2220 }
2221
2222 // Memory barrier to prevent normal and 'unsafe' accesses from
2223 // bypassing each other. Happens after null checks, so the
2224 // exception paths do not take memory state from the memory barrier,
2225 // so there's no problems making a strong assert about mixing users
2226 // of safe & unsafe memory. Otherwise fails in a CTW of rt.jar
2227 // around 5701, class sun/reflect/UnsafeBooleanFieldAccessorImpl.
2228 if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder);
2229
2230 if (!is_store) {
2231 Node* p = make_load(control(), adr, value_type, type, adr_type, is_volatile);
2232 // load value and push onto stack
2233 switch (type) {
2234 case T_BOOLEAN:
2235 case T_CHAR:
2236 case T_BYTE:
2237 case T_SHORT:
2238 case T_INT:
2239 case T_FLOAT:
2240 case T_OBJECT:
2241 push( p );
2242 break;
2243 case T_ADDRESS:
2244 // Cast to an int type.
2245 p = _gvn.transform( new (C, 2) CastP2XNode(NULL,p) );
2246 p = ConvX2L(p);
2247 push_pair(p);
2248 break;
2249 case T_DOUBLE:
2250 case T_LONG:
2251 push_pair( p );
2252 break;
2253 default: ShouldNotReachHere();
2254 }
2255 } else {
2256 // place effect of store into memory
2257 switch (type) {
2258 case T_DOUBLE:
2259 val = dstore_rounding(val);
2260 break;
2261 case T_ADDRESS:
2262 // Repackage the long as a pointer.
2263 val = ConvL2X(val);
2264 val = _gvn.transform( new (C, 2) CastX2PNode(val) );
2265 break;
2266 }
2267
2268 if (type != T_OBJECT ) {
2269 (void) store_to_memory(control(), adr, val, type, adr_type, is_volatile);
2270 } else {
2271 // Possibly an oop being stored to Java heap or native memory
2272 if (!TypePtr::NULL_PTR->higher_equal(_gvn.type(heap_base_oop))) {
2273 // oop to Java heap.
2274 (void) store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type);
2275 } else {
2276 // We can't tell at compile time if we are storing in the Java heap or outside
2277 // of it. So we need to emit code to conditionally do the proper type of
2278 // store.
2279
2280 IdealKit ideal(gvn(), control(), merged_memory());
2281 #define __ ideal.
2282 // QQQ who knows what probability is here??
2283 __ if_then(heap_base_oop, BoolTest::ne, null(), PROB_UNLIKELY(0.999)); {
2284 // Sync IdealKit and graphKit.
2285 set_all_memory( __ merged_memory());
2286 set_control(__ ctrl());
2287 Node* st = store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type);
2288 // Update IdealKit memory.
2289 __ set_all_memory(merged_memory());
2290 __ set_ctrl(control());
2291 } __ else_(); {
2292 __ store(__ ctrl(), adr, val, type, alias_type->index(), is_volatile);
2293 } __ end_if();
2294 // Final sync IdealKit and GraphKit.
2295 sync_kit(ideal);
2296 #undef __
2297 }
2298 }
2299 }
2300
2301 if (is_volatile) {
2302 if (!is_store)
2303 insert_mem_bar(Op_MemBarAcquire);
2304 else
2305 insert_mem_bar(Op_MemBarVolatile);
2306 }
2307
2308 if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder);
2309
2310 return true;
2311 }
2312
2313 //----------------------------inline_unsafe_prefetch----------------------------
2314
2315 bool LibraryCallKit::inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static) {
2316 #ifndef PRODUCT
2317 {
2318 ResourceMark rm;
2319 // Check the signatures.
2320 ciSignature* sig = signature();
2321 #ifdef ASSERT
2322 // Object getObject(Object base, int/long offset), etc.
2323 BasicType rtype = sig->return_type()->basic_type();
2324 if (!is_native_ptr) {
2325 assert(sig->count() == 2, "oop prefetch has 2 arguments");
2326 assert(sig->type_at(0)->basic_type() == T_OBJECT, "prefetch base is object");
2327 assert(sig->type_at(1)->basic_type() == T_LONG, "prefetcha offset is correct");
2328 } else {
2329 assert(sig->count() == 1, "native prefetch has 1 argument");
2330 assert(sig->type_at(0)->basic_type() == T_LONG, "prefetch base is long");
2331 }
2332 #endif // ASSERT
2333 }
2334 #endif // !PRODUCT
2335
2336 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe".
2337
2338 // Argument words: "this" if not static, plus (oop/offset) or (lo/hi) args
2339 int nargs = (is_static ? 0 : 1) + (is_native_ptr ? 2 : 3);
2340
2341 debug_only(int saved_sp = _sp);
2342 _sp += nargs;
2343
2344 // Build address expression. See the code in inline_unsafe_access.
2345 Node *adr;
2346 if (!is_native_ptr) {
2347 // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset
2348 Node* offset = pop_pair();
2349 // The base is either a Java object or a value produced by Unsafe.staticFieldBase
2350 Node* base = pop();
2351 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset
2352 // to be plain byte offsets, which are also the same as those accepted
2353 // by oopDesc::field_base.
2354 assert(Unsafe_field_offset_to_byte_offset(11) == 11,
2355 "fieldOffset must be byte-scaled");
2356 // 32-bit machines ignore the high half!
2357 offset = ConvL2X(offset);
2358 adr = make_unsafe_address(base, offset);
2359 } else {
2360 Node* ptr = pop_pair();
2361 // Adjust Java long to machine word:
2362 ptr = ConvL2X(ptr);
2363 adr = make_unsafe_address(NULL, ptr);
2364 }
2365
2366 if (is_static) {
2367 assert(saved_sp == _sp, "must have correct argument count");
2368 } else {
2369 // Pop receiver last: it was pushed first.
2370 Node *receiver = pop();
2371 assert(saved_sp == _sp, "must have correct argument count");
2372
2373 // Null check on self without removing any arguments. The argument
2374 // null check technically happens in the wrong place, which can lead to
2375 // invalid stack traces when the primitive is inlined into a method
2376 // which handles NullPointerExceptions.
2377 _sp += nargs;
2378 do_null_check(receiver, T_OBJECT);
2379 _sp -= nargs;
2380 if (stopped()) {
2381 return true;
2382 }
2383 }
2384
2385 // Generate the read or write prefetch
2386 Node *prefetch;
2387 if (is_store) {
2388 prefetch = new (C, 3) PrefetchWriteNode(i_o(), adr);
2389 } else {
2390 prefetch = new (C, 3) PrefetchReadNode(i_o(), adr);
2391 }
2392 prefetch->init_req(0, control());
2393 set_i_o(_gvn.transform(prefetch));
2394
2395 return true;
2396 }
2397
2398 //----------------------------inline_unsafe_CAS----------------------------
2399
2400 bool LibraryCallKit::inline_unsafe_CAS(BasicType type) {
2401 // This basic scheme here is the same as inline_unsafe_access, but
2402 // differs in enough details that combining them would make the code
2403 // overly confusing. (This is a true fact! I originally combined
2404 // them, but even I was confused by it!) As much code/comments as
2405 // possible are retained from inline_unsafe_access though to make
2406 // the correspondences clearer. - dl
2407
2408 if (callee()->is_static()) return false; // caller must have the capability!
2409
2410 #ifndef PRODUCT
2411 {
2412 ResourceMark rm;
2413 // Check the signatures.
2414 ciSignature* sig = signature();
2415 #ifdef ASSERT
2416 BasicType rtype = sig->return_type()->basic_type();
2417 assert(rtype == T_BOOLEAN, "CAS must return boolean");
2418 assert(sig->count() == 4, "CAS has 4 arguments");
2419 assert(sig->type_at(0)->basic_type() == T_OBJECT, "CAS base is object");
2420 assert(sig->type_at(1)->basic_type() == T_LONG, "CAS offset is long");
2421 #endif // ASSERT
2422 }
2423 #endif //PRODUCT
2424
2425 // number of stack slots per value argument (1 or 2)
2426 int type_words = type2size[type];
2427
2428 // Cannot inline wide CAS on machines that don't support it natively
2429 if (type2aelembytes(type) > BytesPerInt && !VM_Version::supports_cx8())
2430 return false;
2431
2432 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe".
2433
2434 // Argument words: "this" plus oop plus offset plus oldvalue plus newvalue;
2435 int nargs = 1 + 1 + 2 + type_words + type_words;
2436
2437 // pop arguments: newval, oldval, offset, base, and receiver
2438 debug_only(int saved_sp = _sp);
2439 _sp += nargs;
2440 Node* newval = (type_words == 1) ? pop() : pop_pair();
2441 Node* oldval = (type_words == 1) ? pop() : pop_pair();
2442 Node *offset = pop_pair();
2443 Node *base = pop();
2444 Node *receiver = pop();
2445 assert(saved_sp == _sp, "must have correct argument count");
2446
2447 // Null check receiver.
2448 _sp += nargs;
2449 do_null_check(receiver, T_OBJECT);
2450 _sp -= nargs;
2451 if (stopped()) {
2452 return true;
2453 }
2454
2455 // Build field offset expression.
2456 // We currently rely on the cookies produced by Unsafe.xxxFieldOffset
2457 // to be plain byte offsets, which are also the same as those accepted
2458 // by oopDesc::field_base.
2459 assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled");
2460 // 32-bit machines ignore the high half of long offsets
2461 offset = ConvL2X(offset);
2462 Node* adr = make_unsafe_address(base, offset);
2463 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr();
2464
2465 // (Unlike inline_unsafe_access, there seems no point in trying
2466 // to refine types. Just use the coarse types here.
2467 const Type *value_type = Type::get_const_basic_type(type);
2468 Compile::AliasType* alias_type = C->alias_type(adr_type);
2469 assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here");
2470 int alias_idx = C->get_alias_index(adr_type);
2471
2472 // Memory-model-wise, a CAS acts like a little synchronized block,
2473 // so needs barriers on each side. These don't translate into
2474 // actual barriers on most machines, but we still need rest of
2475 // compiler to respect ordering.
2476
2477 insert_mem_bar(Op_MemBarRelease);
2478 insert_mem_bar(Op_MemBarCPUOrder);
2479
2480 // 4984716: MemBars must be inserted before this
2481 // memory node in order to avoid a false
2482 // dependency which will confuse the scheduler.
2483 Node *mem = memory(alias_idx);
2484
2485 // For now, we handle only those cases that actually exist: ints,
2486 // longs, and Object. Adding others should be straightforward.
2487 Node* cas;
2488 switch(type) {
2489 case T_INT:
2490 cas = _gvn.transform(new (C, 5) CompareAndSwapINode(control(), mem, adr, newval, oldval));
2491 break;
2492 case T_LONG:
2493 cas = _gvn.transform(new (C, 5) CompareAndSwapLNode(control(), mem, adr, newval, oldval));
2494 break;
2495 case T_OBJECT:
2496 // reference stores need a store barrier.
2497 // (They don't if CAS fails, but it isn't worth checking.)
2498 pre_barrier(control(), base, adr, alias_idx, newval, value_type->make_oopptr(), T_OBJECT);
2499 #ifdef _LP64
2500 if (adr->bottom_type()->is_ptr_to_narrowoop()) {
2501 Node *newval_enc = _gvn.transform(new (C, 2) EncodePNode(newval, newval->bottom_type()->make_narrowoop()));
2502 Node *oldval_enc = _gvn.transform(new (C, 2) EncodePNode(oldval, oldval->bottom_type()->make_narrowoop()));
2503 cas = _gvn.transform(new (C, 5) CompareAndSwapNNode(control(), mem, adr,
2504 newval_enc, oldval_enc));
2505 } else
2506 #endif
2507 {
2508 cas = _gvn.transform(new (C, 5) CompareAndSwapPNode(control(), mem, adr, newval, oldval));
2509 }
2510 post_barrier(control(), cas, base, adr, alias_idx, newval, T_OBJECT, true);
2511 break;
2512 default:
2513 ShouldNotReachHere();
2514 break;
2515 }
2516
2517 // SCMemProjNodes represent the memory state of CAS. Their main
2518 // role is to prevent CAS nodes from being optimized away when their
2519 // results aren't used.
2520 Node* proj = _gvn.transform( new (C, 1) SCMemProjNode(cas));
2521 set_memory(proj, alias_idx);
2522
2523 // Add the trailing membar surrounding the access
2524 insert_mem_bar(Op_MemBarCPUOrder);
2525 insert_mem_bar(Op_MemBarAcquire);
2526
2527 push(cas);
2528 return true;
2529 }
2530
2531 bool LibraryCallKit::inline_unsafe_ordered_store(BasicType type) {
2532 // This is another variant of inline_unsafe_access, differing in
2533 // that it always issues store-store ("release") barrier and ensures
2534 // store-atomicity (which only matters for "long").
2535
2536 if (callee()->is_static()) return false; // caller must have the capability!
2537
2538 #ifndef PRODUCT
2539 {
2540 ResourceMark rm;
2541 // Check the signatures.
2542 ciSignature* sig = signature();
2543 #ifdef ASSERT
2544 BasicType rtype = sig->return_type()->basic_type();
2545 assert(rtype == T_VOID, "must return void");
2546 assert(sig->count() == 3, "has 3 arguments");
2547 assert(sig->type_at(0)->basic_type() == T_OBJECT, "base is object");
2548 assert(sig->type_at(1)->basic_type() == T_LONG, "offset is long");
2549 #endif // ASSERT
2550 }
2551 #endif //PRODUCT
2552
2553 // number of stack slots per value argument (1 or 2)
2554 int type_words = type2size[type];
2555
2556 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe".
2557
2558 // Argument words: "this" plus oop plus offset plus value;
2559 int nargs = 1 + 1 + 2 + type_words;
2560
2561 // pop arguments: val, offset, base, and receiver
2562 debug_only(int saved_sp = _sp);
2563 _sp += nargs;
2564 Node* val = (type_words == 1) ? pop() : pop_pair();
2565 Node *offset = pop_pair();
2566 Node *base = pop();
2567 Node *receiver = pop();
2568 assert(saved_sp == _sp, "must have correct argument count");
2569
2570 // Null check receiver.
2571 _sp += nargs;
2572 do_null_check(receiver, T_OBJECT);
2573 _sp -= nargs;
2574 if (stopped()) {
2575 return true;
2576 }
2577
2578 // Build field offset expression.
2579 assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled");
2580 // 32-bit machines ignore the high half of long offsets
2581 offset = ConvL2X(offset);
2582 Node* adr = make_unsafe_address(base, offset);
2583 const TypePtr *adr_type = _gvn.type(adr)->isa_ptr();
2584 const Type *value_type = Type::get_const_basic_type(type);
2585 Compile::AliasType* alias_type = C->alias_type(adr_type);
2586
2587 insert_mem_bar(Op_MemBarRelease);
2588 insert_mem_bar(Op_MemBarCPUOrder);
2589 // Ensure that the store is atomic for longs:
2590 bool require_atomic_access = true;
2591 Node* store;
2592 if (type == T_OBJECT) // reference stores need a store barrier.
2593 store = store_oop_to_unknown(control(), base, adr, adr_type, val, type);
2594 else {
2595 store = store_to_memory(control(), adr, val, type, adr_type, require_atomic_access);
2596 }
2597 insert_mem_bar(Op_MemBarCPUOrder);
2598 return true;
2599 }
2600
2601 bool LibraryCallKit::inline_unsafe_allocate() {
2602 if (callee()->is_static()) return false; // caller must have the capability!
2603 int nargs = 1 + 1;
2604 assert(signature()->size() == nargs-1, "alloc has 1 argument");
2605 null_check_receiver(callee()); // check then ignore argument(0)
2606 _sp += nargs; // set original stack for use by uncommon_trap
2607 Node* cls = do_null_check(argument(1), T_OBJECT);
2608 _sp -= nargs;
2609 if (stopped()) return true;
2610
2611 Node* kls = load_klass_from_mirror(cls, false, nargs, NULL, 0);
2612 _sp += nargs; // set original stack for use by uncommon_trap
2613 kls = do_null_check(kls, T_OBJECT);
2614 _sp -= nargs;
2615 if (stopped()) return true; // argument was like int.class
2616
2617 // Note: The argument might still be an illegal value like
2618 // Serializable.class or Object[].class. The runtime will handle it.
2619 // But we must make an explicit check for initialization.
2620 Node* insp = basic_plus_adr(kls, instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc));
2621 Node* inst = make_load(NULL, insp, TypeInt::INT, T_INT);
2622 Node* bits = intcon(instanceKlass::fully_initialized);
2623 Node* test = _gvn.transform( new (C, 3) SubINode(inst, bits) );
2624 // The 'test' is non-zero if we need to take a slow path.
2625
2626 Node* obj = new_instance(kls, test);
2627 push(obj);
2628
2629 return true;
2630 }
2631
2632 //------------------------inline_native_time_funcs--------------
2633 // inline code for System.currentTimeMillis() and System.nanoTime()
2634 // these have the same type and signature
2635 bool LibraryCallKit::inline_native_time_funcs(bool isNano) {
2636 address funcAddr = isNano ? CAST_FROM_FN_PTR(address, os::javaTimeNanos) :
2637 CAST_FROM_FN_PTR(address, os::javaTimeMillis);
2638 const char * funcName = isNano ? "nanoTime" : "currentTimeMillis";
2639 const TypeFunc *tf = OptoRuntime::current_time_millis_Type();
2640 const TypePtr* no_memory_effects = NULL;
2641 Node* time = make_runtime_call(RC_LEAF, tf, funcAddr, funcName, no_memory_effects);
2642 Node* value = _gvn.transform(new (C, 1) ProjNode(time, TypeFunc::Parms+0));
2643 #ifdef ASSERT
2644 Node* value_top = _gvn.transform(new (C, 1) ProjNode(time, TypeFunc::Parms + 1));
2645 assert(value_top == top(), "second value must be top");
2646 #endif
2647 push_pair(value);
2648 return true;
2649 }
2650
2651 //------------------------inline_native_currentThread------------------
2652 bool LibraryCallKit::inline_native_currentThread() {
2653 Node* junk = NULL;
2654 push(generate_current_thread(junk));
2655 return true;
2656 }
2657
2658 //------------------------inline_native_isInterrupted------------------
2659 bool LibraryCallKit::inline_native_isInterrupted() {
2660 const int nargs = 1+1; // receiver + boolean
2661 assert(nargs == arg_size(), "sanity");
2662 // Add a fast path to t.isInterrupted(clear_int):
2663 // (t == Thread.current() && (!TLS._osthread._interrupted || !clear_int))
2664 // ? TLS._osthread._interrupted : /*slow path:*/ t.isInterrupted(clear_int)
2665 // So, in the common case that the interrupt bit is false,
2666 // we avoid making a call into the VM. Even if the interrupt bit
2667 // is true, if the clear_int argument is false, we avoid the VM call.
2668 // However, if the receiver is not currentThread, we must call the VM,
2669 // because there must be some locking done around the operation.
2670
2671 // We only go to the fast case code if we pass two guards.
2672 // Paths which do not pass are accumulated in the slow_region.
2673 RegionNode* slow_region = new (C, 1) RegionNode(1);
2674 record_for_igvn(slow_region);
2675 RegionNode* result_rgn = new (C, 4) RegionNode(1+3); // fast1, fast2, slow
2676 PhiNode* result_val = new (C, 4) PhiNode(result_rgn, TypeInt::BOOL);
2677 enum { no_int_result_path = 1,
2678 no_clear_result_path = 2,
2679 slow_result_path = 3
2680 };
2681
2682 // (a) Receiving thread must be the current thread.
2683 Node* rec_thr = argument(0);
2684 Node* tls_ptr = NULL;
2685 Node* cur_thr = generate_current_thread(tls_ptr);
2686 Node* cmp_thr = _gvn.transform( new (C, 3) CmpPNode(cur_thr, rec_thr) );
2687 Node* bol_thr = _gvn.transform( new (C, 2) BoolNode(cmp_thr, BoolTest::ne) );
2688
2689 bool known_current_thread = (_gvn.type(bol_thr) == TypeInt::ZERO);
2690 if (!known_current_thread)
2691 generate_slow_guard(bol_thr, slow_region);
2692
2693 // (b) Interrupt bit on TLS must be false.
2694 Node* p = basic_plus_adr(top()/*!oop*/, tls_ptr, in_bytes(JavaThread::osthread_offset()));
2695 Node* osthread = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS);
2696 p = basic_plus_adr(top()/*!oop*/, osthread, in_bytes(OSThread::interrupted_offset()));
2697 // Set the control input on the field _interrupted read to prevent it floating up.
2698 Node* int_bit = make_load(control(), p, TypeInt::BOOL, T_INT);
2699 Node* cmp_bit = _gvn.transform( new (C, 3) CmpINode(int_bit, intcon(0)) );
2700 Node* bol_bit = _gvn.transform( new (C, 2) BoolNode(cmp_bit, BoolTest::ne) );
2701
2702 IfNode* iff_bit = create_and_map_if(control(), bol_bit, PROB_UNLIKELY_MAG(3), COUNT_UNKNOWN);
2703
2704 // First fast path: if (!TLS._interrupted) return false;
2705 Node* false_bit = _gvn.transform( new (C, 1) IfFalseNode(iff_bit) );
2706 result_rgn->init_req(no_int_result_path, false_bit);
2707 result_val->init_req(no_int_result_path, intcon(0));
2708
2709 // drop through to next case
2710 set_control( _gvn.transform(new (C, 1) IfTrueNode(iff_bit)) );
2711
2712 // (c) Or, if interrupt bit is set and clear_int is false, use 2nd fast path.
2713 Node* clr_arg = argument(1);
2714 Node* cmp_arg = _gvn.transform( new (C, 3) CmpINode(clr_arg, intcon(0)) );
2715 Node* bol_arg = _gvn.transform( new (C, 2) BoolNode(cmp_arg, BoolTest::ne) );
2716 IfNode* iff_arg = create_and_map_if(control(), bol_arg, PROB_FAIR, COUNT_UNKNOWN);
2717
2718 // Second fast path: ... else if (!clear_int) return true;
2719 Node* false_arg = _gvn.transform( new (C, 1) IfFalseNode(iff_arg) );
2720 result_rgn->init_req(no_clear_result_path, false_arg);
2721 result_val->init_req(no_clear_result_path, intcon(1));
2722
2723 // drop through to next case
2724 set_control( _gvn.transform(new (C, 1) IfTrueNode(iff_arg)) );
2725
2726 // (d) Otherwise, go to the slow path.
2727 slow_region->add_req(control());
2728 set_control( _gvn.transform(slow_region) );
2729
2730 if (stopped()) {
2731 // There is no slow path.
2732 result_rgn->init_req(slow_result_path, top());
2733 result_val->init_req(slow_result_path, top());
2734 } else {
2735 // non-virtual because it is a private non-static
2736 CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_isInterrupted);
2737
2738 Node* slow_val = set_results_for_java_call(slow_call);
2739 // this->control() comes from set_results_for_java_call
2740
2741 // If we know that the result of the slow call will be true, tell the optimizer!
2742 if (known_current_thread) slow_val = intcon(1);
2743
2744 Node* fast_io = slow_call->in(TypeFunc::I_O);
2745 Node* fast_mem = slow_call->in(TypeFunc::Memory);
2746 // These two phis are pre-filled with copies of of the fast IO and Memory
2747 Node* io_phi = PhiNode::make(result_rgn, fast_io, Type::ABIO);
2748 Node* mem_phi = PhiNode::make(result_rgn, fast_mem, Type::MEMORY, TypePtr::BOTTOM);
2749
2750 result_rgn->init_req(slow_result_path, control());
2751 io_phi ->init_req(slow_result_path, i_o());
2752 mem_phi ->init_req(slow_result_path, reset_memory());
2753 result_val->init_req(slow_result_path, slow_val);
2754
2755 set_all_memory( _gvn.transform(mem_phi) );
2756 set_i_o( _gvn.transform(io_phi) );
2757 }
2758
2759 push_result(result_rgn, result_val);
2760 C->set_has_split_ifs(true); // Has chance for split-if optimization
2761
2762 return true;
2763 }
2764
2765 //---------------------------load_mirror_from_klass----------------------------
2766 // Given a klass oop, load its java mirror (a java.lang.Class oop).
2767 Node* LibraryCallKit::load_mirror_from_klass(Node* klass) {
2768 Node* p = basic_plus_adr(klass, Klass::java_mirror_offset_in_bytes() + sizeof(oopDesc));
2769 return make_load(NULL, p, TypeInstPtr::MIRROR, T_OBJECT);
2770 }
2771
2772 //-----------------------load_klass_from_mirror_common-------------------------
2773 // Given a java mirror (a java.lang.Class oop), load its corresponding klass oop.
2774 // Test the klass oop for null (signifying a primitive Class like Integer.TYPE),
2775 // and branch to the given path on the region.
2776 // If never_see_null, take an uncommon trap on null, so we can optimistically
2777 // compile for the non-null case.
2778 // If the region is NULL, force never_see_null = true.
2779 Node* LibraryCallKit::load_klass_from_mirror_common(Node* mirror,
2780 bool never_see_null,
2781 int nargs,
2782 RegionNode* region,
2783 int null_path,
2784 int offset) {
2785 if (region == NULL) never_see_null = true;
2786 Node* p = basic_plus_adr(mirror, offset);
2787 const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL;
2788 Node* kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, kls_type) );
2789 _sp += nargs; // any deopt will start just before call to enclosing method
2790 Node* null_ctl = top();
2791 kls = null_check_oop(kls, &null_ctl, never_see_null);
2792 if (region != NULL) {
2793 // Set region->in(null_path) if the mirror is a primitive (e.g, int.class).
2794 region->init_req(null_path, null_ctl);
2795 } else {
2796 assert(null_ctl == top(), "no loose ends");
2797 }
2798 _sp -= nargs;
2799 return kls;
2800 }
2801
2802 //--------------------(inline_native_Class_query helpers)---------------------
2803 // Use this for JVM_ACC_INTERFACE, JVM_ACC_IS_CLONEABLE, JVM_ACC_HAS_FINALIZER.
2804 // Fall through if (mods & mask) == bits, take the guard otherwise.
2805 Node* LibraryCallKit::generate_access_flags_guard(Node* kls, int modifier_mask, int modifier_bits, RegionNode* region) {
2806 // Branch around if the given klass has the given modifier bit set.
2807 // Like generate_guard, adds a new path onto the region.
2808 Node* modp = basic_plus_adr(kls, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc));
2809 Node* mods = make_load(NULL, modp, TypeInt::INT, T_INT);
2810 Node* mask = intcon(modifier_mask);
2811 Node* bits = intcon(modifier_bits);
2812 Node* mbit = _gvn.transform( new (C, 3) AndINode(mods, mask) );
2813 Node* cmp = _gvn.transform( new (C, 3) CmpINode(mbit, bits) );
2814 Node* bol = _gvn.transform( new (C, 2) BoolNode(cmp, BoolTest::ne) );
2815 return generate_fair_guard(bol, region);
2816 }
2817 Node* LibraryCallKit::generate_interface_guard(Node* kls, RegionNode* region) {
2818 return generate_access_flags_guard(kls, JVM_ACC_INTERFACE, 0, region);
2819 }
2820
2821 //-------------------------inline_native_Class_query-------------------
2822 bool LibraryCallKit::inline_native_Class_query(vmIntrinsics::ID id) {
2823 int nargs = 1+0; // just the Class mirror, in most cases
2824 const Type* return_type = TypeInt::BOOL;
2825 Node* prim_return_value = top(); // what happens if it's a primitive class?
2826 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check);
2827 bool expect_prim = false; // most of these guys expect to work on refs
2828
2829 enum { _normal_path = 1, _prim_path = 2, PATH_LIMIT };
2830
2831 switch (id) {
2832 case vmIntrinsics::_isInstance:
2833 nargs = 1+1; // the Class mirror, plus the object getting queried about
2834 // nothing is an instance of a primitive type
2835 prim_return_value = intcon(0);
2836 break;
2837 case vmIntrinsics::_getModifiers:
2838 prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2839 assert(is_power_of_2((int)JVM_ACC_WRITTEN_FLAGS+1), "change next line");
2840 return_type = TypeInt::make(0, JVM_ACC_WRITTEN_FLAGS, Type::WidenMin);
2841 break;
2842 case vmIntrinsics::_isInterface:
2843 prim_return_value = intcon(0);
2844 break;
2845 case vmIntrinsics::_isArray:
2846 prim_return_value = intcon(0);
2847 expect_prim = true; // cf. ObjectStreamClass.getClassSignature
2848 break;
2849 case vmIntrinsics::_isPrimitive:
2850 prim_return_value = intcon(1);
2851 expect_prim = true; // obviously
2852 break;
2853 case vmIntrinsics::_getSuperclass:
2854 prim_return_value = null();
2855 return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR);
2856 break;
2857 case vmIntrinsics::_getComponentType:
2858 prim_return_value = null();
2859 return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR);
2860 break;
2861 case vmIntrinsics::_getClassAccessFlags:
2862 prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2863 return_type = TypeInt::INT; // not bool! 6297094
2864 break;
2865 default:
2866 ShouldNotReachHere();
2867 }
2868
2869 Node* mirror = argument(0);
2870 Node* obj = (nargs <= 1)? top(): argument(1);
2871
2872 const TypeInstPtr* mirror_con = _gvn.type(mirror)->isa_instptr();
2873 if (mirror_con == NULL) return false; // cannot happen?
2874
2875 #ifndef PRODUCT
2876 if (PrintIntrinsics || PrintInlining || PrintOptoInlining) {
2877 ciType* k = mirror_con->java_mirror_type();
2878 if (k) {
2879 tty->print("Inlining %s on constant Class ", vmIntrinsics::name_at(intrinsic_id()));
2880 k->print_name();
2881 tty->cr();
2882 }
2883 }
2884 #endif
2885
2886 // Null-check the mirror, and the mirror's klass ptr (in case it is a primitive).
2887 RegionNode* region = new (C, PATH_LIMIT) RegionNode(PATH_LIMIT);
2888 record_for_igvn(region);
2889 PhiNode* phi = new (C, PATH_LIMIT) PhiNode(region, return_type);
2890
2891 // The mirror will never be null of Reflection.getClassAccessFlags, however
2892 // it may be null for Class.isInstance or Class.getModifiers. Throw a NPE
2893 // if it is. See bug 4774291.
2894
2895 // For Reflection.getClassAccessFlags(), the null check occurs in
2896 // the wrong place; see inline_unsafe_access(), above, for a similar
2897 // situation.
2898 _sp += nargs; // set original stack for use by uncommon_trap
2899 mirror = do_null_check(mirror, T_OBJECT);
2900 _sp -= nargs;
2901 // If mirror or obj is dead, only null-path is taken.
2902 if (stopped()) return true;
2903
2904 if (expect_prim) never_see_null = false; // expect nulls (meaning prims)
2905
2906 // Now load the mirror's klass metaobject, and null-check it.
2907 // Side-effects region with the control path if the klass is null.
2908 Node* kls = load_klass_from_mirror(mirror, never_see_null, nargs,
2909 region, _prim_path);
2910 // If kls is null, we have a primitive mirror.
2911 phi->init_req(_prim_path, prim_return_value);
2912 if (stopped()) { push_result(region, phi); return true; }
2913
2914 Node* p; // handy temp
2915 Node* null_ctl;
2916
2917 // Now that we have the non-null klass, we can perform the real query.
2918 // For constant classes, the query will constant-fold in LoadNode::Value.
2919 Node* query_value = top();
2920 switch (id) {
2921 case vmIntrinsics::_isInstance:
2922 // nothing is an instance of a primitive type
2923 query_value = gen_instanceof(obj, kls);
2924 break;
2925
2926 case vmIntrinsics::_getModifiers:
2927 p = basic_plus_adr(kls, Klass::modifier_flags_offset_in_bytes() + sizeof(oopDesc));
2928 query_value = make_load(NULL, p, TypeInt::INT, T_INT);
2929 break;
2930
2931 case vmIntrinsics::_isInterface:
2932 // (To verify this code sequence, check the asserts in JVM_IsInterface.)
2933 if (generate_interface_guard(kls, region) != NULL)
2934 // A guard was added. If the guard is taken, it was an interface.
2935 phi->add_req(intcon(1));
2936 // If we fall through, it's a plain class.
2937 query_value = intcon(0);
2938 break;
2939
2940 case vmIntrinsics::_isArray:
2941 // (To verify this code sequence, check the asserts in JVM_IsArrayClass.)
2942 if (generate_array_guard(kls, region) != NULL)
2943 // A guard was added. If the guard is taken, it was an array.
2944 phi->add_req(intcon(1));
2945 // If we fall through, it's a plain class.
2946 query_value = intcon(0);
2947 break;
2948
2949 case vmIntrinsics::_isPrimitive:
2950 query_value = intcon(0); // "normal" path produces false
2951 break;
2952
2953 case vmIntrinsics::_getSuperclass:
2954 // The rules here are somewhat unfortunate, but we can still do better
2955 // with random logic than with a JNI call.
2956 // Interfaces store null or Object as _super, but must report null.
2957 // Arrays store an intermediate super as _super, but must report Object.
2958 // Other types can report the actual _super.
2959 // (To verify this code sequence, check the asserts in JVM_IsInterface.)
2960 if (generate_interface_guard(kls, region) != NULL)
2961 // A guard was added. If the guard is taken, it was an interface.
2962 phi->add_req(null());
2963 if (generate_array_guard(kls, region) != NULL)
2964 // A guard was added. If the guard is taken, it was an array.
2965 phi->add_req(makecon(TypeInstPtr::make(env()->Object_klass()->java_mirror())));
2966 // If we fall through, it's a plain class. Get its _super.
2967 p = basic_plus_adr(kls, Klass::super_offset_in_bytes() + sizeof(oopDesc));
2968 kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, TypeKlassPtr::OBJECT_OR_NULL) );
2969 null_ctl = top();
2970 kls = null_check_oop(kls, &null_ctl);
2971 if (null_ctl != top()) {
2972 // If the guard is taken, Object.superClass is null (both klass and mirror).
2973 region->add_req(null_ctl);
2974 phi ->add_req(null());
2975 }
2976 if (!stopped()) {
2977 query_value = load_mirror_from_klass(kls);
2978 }
2979 break;
2980
2981 case vmIntrinsics::_getComponentType:
2982 if (generate_array_guard(kls, region) != NULL) {
2983 // Be sure to pin the oop load to the guard edge just created:
2984 Node* is_array_ctrl = region->in(region->req()-1);
2985 Node* cma = basic_plus_adr(kls, in_bytes(arrayKlass::component_mirror_offset()) + sizeof(oopDesc));
2986 Node* cmo = make_load(is_array_ctrl, cma, TypeInstPtr::MIRROR, T_OBJECT);
2987 phi->add_req(cmo);
2988 }
2989 query_value = null(); // non-array case is null
2990 break;
2991
2992 case vmIntrinsics::_getClassAccessFlags:
2993 p = basic_plus_adr(kls, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc));
2994 query_value = make_load(NULL, p, TypeInt::INT, T_INT);
2995 break;
2996
2997 default:
2998 ShouldNotReachHere();
2999 }
3000
3001 // Fall-through is the normal case of a query to a real class.
3002 phi->init_req(1, query_value);
3003 region->init_req(1, control());
3004
3005 push_result(region, phi);
3006 C->set_has_split_ifs(true); // Has chance for split-if optimization
3007
3008 return true;
3009 }
3010
3011 //--------------------------inline_native_subtype_check------------------------
3012 // This intrinsic takes the JNI calls out of the heart of
3013 // UnsafeFieldAccessorImpl.set, which improves Field.set, readObject, etc.
3014 bool LibraryCallKit::inline_native_subtype_check() {
3015 int nargs = 1+1; // the Class mirror, plus the other class getting examined
3016
3017 // Pull both arguments off the stack.
3018 Node* args[2]; // two java.lang.Class mirrors: superc, subc
3019 args[0] = argument(0);
3020 args[1] = argument(1);
3021 Node* klasses[2]; // corresponding Klasses: superk, subk
3022 klasses[0] = klasses[1] = top();
3023
3024 enum {
3025 // A full decision tree on {superc is prim, subc is prim}:
3026 _prim_0_path = 1, // {P,N} => false
3027 // {P,P} & superc!=subc => false
3028 _prim_same_path, // {P,P} & superc==subc => true
3029 _prim_1_path, // {N,P} => false
3030 _ref_subtype_path, // {N,N} & subtype check wins => true
3031 _both_ref_path, // {N,N} & subtype check loses => false
3032 PATH_LIMIT
3033 };
3034
3035 RegionNode* region = new (C, PATH_LIMIT) RegionNode(PATH_LIMIT);
3036 Node* phi = new (C, PATH_LIMIT) PhiNode(region, TypeInt::BOOL);
3037 record_for_igvn(region);
3038
3039 const TypePtr* adr_type = TypeRawPtr::BOTTOM; // memory type of loads
3040 const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL;
3041 int class_klass_offset = java_lang_Class::klass_offset_in_bytes();
3042
3043 // First null-check both mirrors and load each mirror's klass metaobject.
3044 int which_arg;
3045 for (which_arg = 0; which_arg <= 1; which_arg++) {
3046 Node* arg = args[which_arg];
3047 _sp += nargs; // set original stack for use by uncommon_trap
3048 arg = do_null_check(arg, T_OBJECT);
3049 _sp -= nargs;
3050 if (stopped()) break;
3051 args[which_arg] = _gvn.transform(arg);
3052
3053 Node* p = basic_plus_adr(arg, class_klass_offset);
3054 Node* kls = LoadKlassNode::make(_gvn, immutable_memory(), p, adr_type, kls_type);
3055 klasses[which_arg] = _gvn.transform(kls);
3056 }
3057
3058 // Having loaded both klasses, test each for null.
3059 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check);
3060 for (which_arg = 0; which_arg <= 1; which_arg++) {
3061 Node* kls = klasses[which_arg];
3062 Node* null_ctl = top();
3063 _sp += nargs; // set original stack for use by uncommon_trap
3064 kls = null_check_oop(kls, &null_ctl, never_see_null);
3065 _sp -= nargs;
3066 int prim_path = (which_arg == 0 ? _prim_0_path : _prim_1_path);
3067 region->init_req(prim_path, null_ctl);
3068 if (stopped()) break;
3069 klasses[which_arg] = kls;
3070 }
3071
3072 if (!stopped()) {
3073 // now we have two reference types, in klasses[0..1]
3074 Node* subk = klasses[1]; // the argument to isAssignableFrom
3075 Node* superk = klasses[0]; // the receiver
3076 region->set_req(_both_ref_path, gen_subtype_check(subk, superk));
3077 // now we have a successful reference subtype check
3078 region->set_req(_ref_subtype_path, control());
3079 }
3080
3081 // If both operands are primitive (both klasses null), then
3082 // we must return true when they are identical primitives.
3083 // It is convenient to test this after the first null klass check.
3084 set_control(region->in(_prim_0_path)); // go back to first null check
3085 if (!stopped()) {
3086 // Since superc is primitive, make a guard for the superc==subc case.
3087 Node* cmp_eq = _gvn.transform( new (C, 3) CmpPNode(args[0], args[1]) );
3088 Node* bol_eq = _gvn.transform( new (C, 2) BoolNode(cmp_eq, BoolTest::eq) );
3089 generate_guard(bol_eq, region, PROB_FAIR);
3090 if (region->req() == PATH_LIMIT+1) {
3091 // A guard was added. If the added guard is taken, superc==subc.
3092 region->swap_edges(PATH_LIMIT, _prim_same_path);
3093 region->del_req(PATH_LIMIT);
3094 }
3095 region->set_req(_prim_0_path, control()); // Not equal after all.
3096 }
3097
3098 // these are the only paths that produce 'true':
3099 phi->set_req(_prim_same_path, intcon(1));
3100 phi->set_req(_ref_subtype_path, intcon(1));
3101
3102 // pull together the cases:
3103 assert(region->req() == PATH_LIMIT, "sane region");
3104 for (uint i = 1; i < region->req(); i++) {
3105 Node* ctl = region->in(i);
3106 if (ctl == NULL || ctl == top()) {
3107 region->set_req(i, top());
3108 phi ->set_req(i, top());
3109 } else if (phi->in(i) == NULL) {
3110 phi->set_req(i, intcon(0)); // all other paths produce 'false'
3111 }
3112 }
3113
3114 set_control(_gvn.transform(region));
3115 push(_gvn.transform(phi));
3116
3117 return true;
3118 }
3119
3120 //---------------------generate_array_guard_common------------------------
3121 Node* LibraryCallKit::generate_array_guard_common(Node* kls, RegionNode* region,
3122 bool obj_array, bool not_array) {
3123 // If obj_array/non_array==false/false:
3124 // Branch around if the given klass is in fact an array (either obj or prim).
3125 // If obj_array/non_array==false/true:
3126 // Branch around if the given klass is not an array klass of any kind.
3127 // If obj_array/non_array==true/true:
3128 // Branch around if the kls is not an oop array (kls is int[], String, etc.)
3129 // If obj_array/non_array==true/false:
3130 // Branch around if the kls is an oop array (Object[] or subtype)
3131 //
3132 // Like generate_guard, adds a new path onto the region.
3133 jint layout_con = 0;
3134 Node* layout_val = get_layout_helper(kls, layout_con);
3135 if (layout_val == NULL) {
3136 bool query = (obj_array
3137 ? Klass::layout_helper_is_objArray(layout_con)
3138 : Klass::layout_helper_is_javaArray(layout_con));
3139 if (query == not_array) {
3140 return NULL; // never a branch
3141 } else { // always a branch
3142 Node* always_branch = control();
3143 if (region != NULL)
3144 region->add_req(always_branch);
3145 set_control(top());
3146 return always_branch;
3147 }
3148 }
3149 // Now test the correct condition.
3150 jint nval = (obj_array
3151 ? ((jint)Klass::_lh_array_tag_type_value
3152 << Klass::_lh_array_tag_shift)
3153 : Klass::_lh_neutral_value);
3154 Node* cmp = _gvn.transform( new(C, 3) CmpINode(layout_val, intcon(nval)) );
3155 BoolTest::mask btest = BoolTest::lt; // correct for testing is_[obj]array
3156 // invert the test if we are looking for a non-array
3157 if (not_array) btest = BoolTest(btest).negate();
3158 Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, btest) );
3159 return generate_fair_guard(bol, region);
3160 }
3161
3162
3163 //-----------------------inline_native_newArray--------------------------
3164 bool LibraryCallKit::inline_native_newArray() {
3165 int nargs = 2;
3166 Node* mirror = argument(0);
3167 Node* count_val = argument(1);
3168
3169 _sp += nargs; // set original stack for use by uncommon_trap
3170 mirror = do_null_check(mirror, T_OBJECT);
3171 _sp -= nargs;
3172 // If mirror or obj is dead, only null-path is taken.
3173 if (stopped()) return true;
3174
3175 enum { _normal_path = 1, _slow_path = 2, PATH_LIMIT };
3176 RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT);
3177 PhiNode* result_val = new(C, PATH_LIMIT) PhiNode(result_reg,
3178 TypeInstPtr::NOTNULL);
3179 PhiNode* result_io = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO);
3180 PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY,
3181 TypePtr::BOTTOM);
3182
3183 bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check);
3184 Node* klass_node = load_array_klass_from_mirror(mirror, never_see_null,
3185 nargs,
3186 result_reg, _slow_path);
3187 Node* normal_ctl = control();
3188 Node* no_array_ctl = result_reg->in(_slow_path);
3189
3190 // Generate code for the slow case. We make a call to newArray().
3191 set_control(no_array_ctl);
3192 if (!stopped()) {
3193 // Either the input type is void.class, or else the
3194 // array klass has not yet been cached. Either the
3195 // ensuing call will throw an exception, or else it
3196 // will cache the array klass for next time.
3197 PreserveJVMState pjvms(this);
3198 CallJavaNode* slow_call = generate_method_call_static(vmIntrinsics::_newArray);
3199 Node* slow_result = set_results_for_java_call(slow_call);
3200 // this->control() comes from set_results_for_java_call
3201 result_reg->set_req(_slow_path, control());
3202 result_val->set_req(_slow_path, slow_result);
3203 result_io ->set_req(_slow_path, i_o());
3204 result_mem->set_req(_slow_path, reset_memory());
3205 }
3206
3207 set_control(normal_ctl);
3208 if (!stopped()) {
3209 // Normal case: The array type has been cached in the java.lang.Class.
3210 // The following call works fine even if the array type is polymorphic.
3211 // It could be a dynamic mix of int[], boolean[], Object[], etc.
3212 Node* obj = new_array(klass_node, count_val, nargs);
3213 result_reg->init_req(_normal_path, control());
3214 result_val->init_req(_normal_path, obj);
3215 result_io ->init_req(_normal_path, i_o());
3216 result_mem->init_req(_normal_path, reset_memory());
3217 }
3218
3219 // Return the combined state.
3220 set_i_o( _gvn.transform(result_io) );
3221 set_all_memory( _gvn.transform(result_mem) );
3222 push_result(result_reg, result_val);
3223 C->set_has_split_ifs(true); // Has chance for split-if optimization
3224
3225 return true;
3226 }
3227
3228 //----------------------inline_native_getLength--------------------------
3229 bool LibraryCallKit::inline_native_getLength() {
3230 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false;
3231
3232 int nargs = 1;
3233 Node* array = argument(0);
3234
3235 _sp += nargs; // set original stack for use by uncommon_trap
3236 array = do_null_check(array, T_OBJECT);
3237 _sp -= nargs;
3238
3239 // If array is dead, only null-path is taken.
3240 if (stopped()) return true;
3241
3242 // Deoptimize if it is a non-array.
3243 Node* non_array = generate_non_array_guard(load_object_klass(array), NULL);
3244
3245 if (non_array != NULL) {
3246 PreserveJVMState pjvms(this);
3247 set_control(non_array);
3248 _sp += nargs; // push the arguments back on the stack
3249 uncommon_trap(Deoptimization::Reason_intrinsic,
3250 Deoptimization::Action_maybe_recompile);
3251 }
3252
3253 // If control is dead, only non-array-path is taken.
3254 if (stopped()) return true;
3255
3256 // The works fine even if the array type is polymorphic.
3257 // It could be a dynamic mix of int[], boolean[], Object[], etc.
3258 push( load_array_length(array) );
3259
3260 C->set_has_split_ifs(true); // Has chance for split-if optimization
3261
3262 return true;
3263 }
3264
3265 //------------------------inline_array_copyOf----------------------------
3266 bool LibraryCallKit::inline_array_copyOf(bool is_copyOfRange) {
3267 if (too_many_traps(Deoptimization::Reason_intrinsic)) return false;
3268
3269 // Restore the stack and pop off the arguments.
3270 int nargs = 3 + (is_copyOfRange? 1: 0);
3271 Node* original = argument(0);
3272 Node* start = is_copyOfRange? argument(1): intcon(0);
3273 Node* end = is_copyOfRange? argument(2): argument(1);
3274 Node* array_type_mirror = is_copyOfRange? argument(3): argument(2);
3275
3276 Node* newcopy;
3277
3278 //set the original stack and the reexecute bit for the interpreter to reexecute
3279 //the bytecode that invokes Arrays.copyOf if deoptimization happens
3280 { PreserveReexecuteState preexecs(this);
3281 _sp += nargs;
3282 jvms()->set_should_reexecute(true);
3283
3284 array_type_mirror = do_null_check(array_type_mirror, T_OBJECT);
3285 original = do_null_check(original, T_OBJECT);
3286
3287 // Check if a null path was taken unconditionally.
3288 if (stopped()) return true;
3289
3290 Node* orig_length = load_array_length(original);
3291
3292 Node* klass_node = load_klass_from_mirror(array_type_mirror, false, 0,
3293 NULL, 0);
3294 klass_node = do_null_check(klass_node, T_OBJECT);
3295
3296 RegionNode* bailout = new (C, 1) RegionNode(1);
3297 record_for_igvn(bailout);
3298
3299 // Despite the generic type of Arrays.copyOf, the mirror might be int, int[], etc.
3300 // Bail out if that is so.
3301 Node* not_objArray = generate_non_objArray_guard(klass_node, bailout);
3302 if (not_objArray != NULL) {
3303 // Improve the klass node's type from the new optimistic assumption:
3304 ciKlass* ak = ciArrayKlass::make(env()->Object_klass());
3305 const Type* akls = TypeKlassPtr::make(TypePtr::NotNull, ak, 0/*offset*/);
3306 Node* cast = new (C, 2) CastPPNode(klass_node, akls);
3307 cast->init_req(0, control());
3308 klass_node = _gvn.transform(cast);
3309 }
3310
3311 // Bail out if either start or end is negative.
3312 generate_negative_guard(start, bailout, &start);
3313 generate_negative_guard(end, bailout, &end);
3314
3315 Node* length = end;
3316 if (_gvn.type(start) != TypeInt::ZERO) {
3317 length = _gvn.transform( new (C, 3) SubINode(end, start) );
3318 }
3319
3320 // Bail out if length is negative.
3321 // ...Not needed, since the new_array will throw the right exception.
3322 //generate_negative_guard(length, bailout, &length);
3323
3324 if (bailout->req() > 1) {
3325 PreserveJVMState pjvms(this);
3326 set_control( _gvn.transform(bailout) );
3327 uncommon_trap(Deoptimization::Reason_intrinsic,
3328 Deoptimization::Action_maybe_recompile);
3329 }
3330
3331 if (!stopped()) {
3332
3333 // How many elements will we copy from the original?
3334 // The answer is MinI(orig_length - start, length).
3335 Node* orig_tail = _gvn.transform( new(C, 3) SubINode(orig_length, start) );
3336 Node* moved = generate_min_max(vmIntrinsics::_min, orig_tail, length);
3337
3338 const bool raw_mem_only = true;
3339 newcopy = new_array(klass_node, length, 0, raw_mem_only);
3340
3341 // Generate a direct call to the right arraycopy function(s).
3342 // We know the copy is disjoint but we might not know if the
3343 // oop stores need checking.
3344 // Extreme case: Arrays.copyOf((Integer[])x, 10, String[].class).
3345 // This will fail a store-check if x contains any non-nulls.
3346 bool disjoint_bases = true;
3347 bool length_never_negative = true;
3348 generate_arraycopy(TypeAryPtr::OOPS, T_OBJECT,
3349 original, start, newcopy, intcon(0), moved,
3350 disjoint_bases, length_never_negative);
3351 }
3352 } //original reexecute and sp are set back here
3353
3354 if(!stopped()) {
3355 push(newcopy);
3356 }
3357
3358 C->set_has_split_ifs(true); // Has chance for split-if optimization
3359
3360 return true;
3361 }
3362
3363
3364 //----------------------generate_virtual_guard---------------------------
3365 // Helper for hashCode and clone. Peeks inside the vtable to avoid a call.
3366 Node* LibraryCallKit::generate_virtual_guard(Node* obj_klass,
3367 RegionNode* slow_region) {
3368 ciMethod* method = callee();
3369 int vtable_index = method->vtable_index();
3370 // Get the methodOop out of the appropriate vtable entry.
3371 int entry_offset = (instanceKlass::vtable_start_offset() +
3372 vtable_index*vtableEntry::size()) * wordSize +
3373 vtableEntry::method_offset_in_bytes();
3374 Node* entry_addr = basic_plus_adr(obj_klass, entry_offset);
3375 Node* target_call = make_load(NULL, entry_addr, TypeInstPtr::NOTNULL, T_OBJECT);
3376
3377 // Compare the target method with the expected method (e.g., Object.hashCode).
3378 const TypeInstPtr* native_call_addr = TypeInstPtr::make(method);
3379
3380 Node* native_call = makecon(native_call_addr);
3381 Node* chk_native = _gvn.transform( new(C, 3) CmpPNode(target_call, native_call) );
3382 Node* test_native = _gvn.transform( new(C, 2) BoolNode(chk_native, BoolTest::ne) );
3383
3384 return generate_slow_guard(test_native, slow_region);
3385 }
3386
3387 //-----------------------generate_method_call----------------------------
3388 // Use generate_method_call to make a slow-call to the real
3389 // method if the fast path fails. An alternative would be to
3390 // use a stub like OptoRuntime::slow_arraycopy_Java.
3391 // This only works for expanding the current library call,
3392 // not another intrinsic. (E.g., don't use this for making an
3393 // arraycopy call inside of the copyOf intrinsic.)
3394 CallJavaNode*
3395 LibraryCallKit::generate_method_call(vmIntrinsics::ID method_id, bool is_virtual, bool is_static) {
3396 // When compiling the intrinsic method itself, do not use this technique.
3397 guarantee(callee() != C->method(), "cannot make slow-call to self");
3398
3399 ciMethod* method = callee();
3400 // ensure the JVMS we have will be correct for this call
3401 guarantee(method_id == method->intrinsic_id(), "must match");
3402
3403 const TypeFunc* tf = TypeFunc::make(method);
3404 int tfdc = tf->domain()->cnt();
3405 CallJavaNode* slow_call;
3406 if (is_static) {
3407 assert(!is_virtual, "");
3408 slow_call = new(C, tfdc) CallStaticJavaNode(tf,
3409 SharedRuntime::get_resolve_static_call_stub(),
3410 method, bci());
3411 } else if (is_virtual) {
3412 null_check_receiver(method);
3413 int vtable_index = methodOopDesc::invalid_vtable_index;
3414 if (UseInlineCaches) {
3415 // Suppress the vtable call
3416 } else {
3417 // hashCode and clone are not a miranda methods,
3418 // so the vtable index is fixed.
3419 // No need to use the linkResolver to get it.
3420 vtable_index = method->vtable_index();
3421 }
3422 slow_call = new(C, tfdc) CallDynamicJavaNode(tf,
3423 SharedRuntime::get_resolve_virtual_call_stub(),
3424 method, vtable_index, bci());
3425 } else { // neither virtual nor static: opt_virtual
3426 null_check_receiver(method);
3427 slow_call = new(C, tfdc) CallStaticJavaNode(tf,
3428 SharedRuntime::get_resolve_opt_virtual_call_stub(),
3429 method, bci());
3430 slow_call->set_optimized_virtual(true);
3431 }
3432 set_arguments_for_java_call(slow_call);
3433 set_edges_for_java_call(slow_call);
3434 return slow_call;
3435 }
3436
3437
3438 //------------------------------inline_native_hashcode--------------------
3439 // Build special case code for calls to hashCode on an object.
3440 bool LibraryCallKit::inline_native_hashcode(bool is_virtual, bool is_static) {
3441 assert(is_static == callee()->is_static(), "correct intrinsic selection");
3442 assert(!(is_virtual && is_static), "either virtual, special, or static");
3443
3444 enum { _slow_path = 1, _fast_path, _null_path, PATH_LIMIT };
3445
3446 RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT);
3447 PhiNode* result_val = new(C, PATH_LIMIT) PhiNode(result_reg,
3448 TypeInt::INT);
3449 PhiNode* result_io = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO);
3450 PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY,
3451 TypePtr::BOTTOM);
3452 Node* obj = NULL;
3453 if (!is_static) {
3454 // Check for hashing null object
3455 obj = null_check_receiver(callee());
3456 if (stopped()) return true; // unconditionally null
3457 result_reg->init_req(_null_path, top());
3458 result_val->init_req(_null_path, top());
3459 } else {
3460 // Do a null check, and return zero if null.
3461 // System.identityHashCode(null) == 0
3462 obj = argument(0);
3463 Node* null_ctl = top();
3464 obj = null_check_oop(obj, &null_ctl);
3465 result_reg->init_req(_null_path, null_ctl);
3466 result_val->init_req(_null_path, _gvn.intcon(0));
3467 }
3468
3469 // Unconditionally null? Then return right away.
3470 if (stopped()) {
3471 set_control( result_reg->in(_null_path) );
3472 if (!stopped())
3473 push( result_val ->in(_null_path) );
3474 return true;
3475 }
3476
3477 // After null check, get the object's klass.
3478 Node* obj_klass = load_object_klass(obj);
3479
3480 // This call may be virtual (invokevirtual) or bound (invokespecial).
3481 // For each case we generate slightly different code.
3482
3483 // We only go to the fast case code if we pass a number of guards. The
3484 // paths which do not pass are accumulated in the slow_region.
3485 RegionNode* slow_region = new (C, 1) RegionNode(1);
3486 record_for_igvn(slow_region);
3487
3488 // If this is a virtual call, we generate a funny guard. We pull out
3489 // the vtable entry corresponding to hashCode() from the target object.
3490 // If the target method which we are calling happens to be the native
3491 // Object hashCode() method, we pass the guard. We do not need this
3492 // guard for non-virtual calls -- the caller is known to be the native
3493 // Object hashCode().
3494 if (is_virtual) {
3495 generate_virtual_guard(obj_klass, slow_region);
3496 }
3497
3498 // Get the header out of the object, use LoadMarkNode when available
3499 Node* header_addr = basic_plus_adr(obj, oopDesc::mark_offset_in_bytes());
3500 Node* header = make_load(NULL, header_addr, TypeRawPtr::BOTTOM, T_ADDRESS);
3501 header = _gvn.transform( new (C, 2) CastP2XNode(NULL, header) );
3502
3503 // Test the header to see if it is unlocked.
3504 Node *lock_mask = _gvn.MakeConX(markOopDesc::biased_lock_mask_in_place);
3505 Node *lmasked_header = _gvn.transform( new (C, 3) AndXNode(header, lock_mask) );
3506 Node *unlocked_val = _gvn.MakeConX(markOopDesc::unlocked_value);
3507 Node *chk_unlocked = _gvn.transform( new (C, 3) CmpXNode( lmasked_header, unlocked_val));
3508 Node *test_unlocked = _gvn.transform( new (C, 2) BoolNode( chk_unlocked, BoolTest::ne) );
3509
3510 generate_slow_guard(test_unlocked, slow_region);
3511
3512 // Get the hash value and check to see that it has been properly assigned.
3513 // We depend on hash_mask being at most 32 bits and avoid the use of
3514 // hash_mask_in_place because it could be larger than 32 bits in a 64-bit
3515 // vm: see markOop.hpp.
3516 Node *hash_mask = _gvn.intcon(markOopDesc::hash_mask);
3517 Node *hash_shift = _gvn.intcon(markOopDesc::hash_shift);
3518 Node *hshifted_header= _gvn.transform( new (C, 3) URShiftXNode(header, hash_shift) );
3519 // This hack lets the hash bits live anywhere in the mark object now, as long
3520 // as the shift drops the relevant bits into the low 32 bits. Note that
3521 // Java spec says that HashCode is an int so there's no point in capturing
3522 // an 'X'-sized hashcode (32 in 32-bit build or 64 in 64-bit build).
3523 hshifted_header = ConvX2I(hshifted_header);
3524 Node *hash_val = _gvn.transform( new (C, 3) AndINode(hshifted_header, hash_mask) );
3525
3526 Node *no_hash_val = _gvn.intcon(markOopDesc::no_hash);
3527 Node *chk_assigned = _gvn.transform( new (C, 3) CmpINode( hash_val, no_hash_val));
3528 Node *test_assigned = _gvn.transform( new (C, 2) BoolNode( chk_assigned, BoolTest::eq) );
3529
3530 generate_slow_guard(test_assigned, slow_region);
3531
3532 Node* init_mem = reset_memory();
3533 // fill in the rest of the null path:
3534 result_io ->init_req(_null_path, i_o());
3535 result_mem->init_req(_null_path, init_mem);
3536
3537 result_val->init_req(_fast_path, hash_val);
3538 result_reg->init_req(_fast_path, control());
3539 result_io ->init_req(_fast_path, i_o());
3540 result_mem->init_req(_fast_path, init_mem);
3541
3542 // Generate code for the slow case. We make a call to hashCode().
3543 set_control(_gvn.transform(slow_region));
3544 if (!stopped()) {
3545 // No need for PreserveJVMState, because we're using up the present state.
3546 set_all_memory(init_mem);
3547 vmIntrinsics::ID hashCode_id = vmIntrinsics::_hashCode;
3548 if (is_static) hashCode_id = vmIntrinsics::_identityHashCode;
3549 CallJavaNode* slow_call = generate_method_call(hashCode_id, is_virtual, is_static);
3550 Node* slow_result = set_results_for_java_call(slow_call);
3551 // this->control() comes from set_results_for_java_call
3552 result_reg->init_req(_slow_path, control());
3553 result_val->init_req(_slow_path, slow_result);
3554 result_io ->set_req(_slow_path, i_o());
3555 result_mem ->set_req(_slow_path, reset_memory());
3556 }
3557
3558 // Return the combined state.
3559 set_i_o( _gvn.transform(result_io) );
3560 set_all_memory( _gvn.transform(result_mem) );
3561 push_result(result_reg, result_val);
3562
3563 return true;
3564 }
3565
3566 //---------------------------inline_native_getClass----------------------------
3567 // Build special case code for calls to getClass on an object.
3568 bool LibraryCallKit::inline_native_getClass() {
3569 Node* obj = null_check_receiver(callee());
3570 if (stopped()) return true;
3571 push( load_mirror_from_klass(load_object_klass(obj)) );
3572 return true;
3573 }
3574
3575 //-----------------inline_native_Reflection_getCallerClass---------------------
3576 // In the presence of deep enough inlining, getCallerClass() becomes a no-op.
3577 //
3578 // NOTE that this code must perform the same logic as
3579 // vframeStream::security_get_caller_frame in that it must skip
3580 // Method.invoke() and auxiliary frames.
3581
3582
3583
3584
3585 bool LibraryCallKit::inline_native_Reflection_getCallerClass() {
3586 ciMethod* method = callee();
3587
3588 #ifndef PRODUCT
3589 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) {
3590 tty->print_cr("Attempting to inline sun.reflect.Reflection.getCallerClass");
3591 }
3592 #endif
3593
3594 debug_only(int saved_sp = _sp);
3595
3596 // Argument words: (int depth)
3597 int nargs = 1;
3598
3599 _sp += nargs;
3600 Node* caller_depth_node = pop();
3601
3602 assert(saved_sp == _sp, "must have correct argument count");
3603
3604 // The depth value must be a constant in order for the runtime call
3605 // to be eliminated.
3606 const TypeInt* caller_depth_type = _gvn.type(caller_depth_node)->isa_int();
3607 if (caller_depth_type == NULL || !caller_depth_type->is_con()) {
3608 #ifndef PRODUCT
3609 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) {
3610 tty->print_cr(" Bailing out because caller depth was not a constant");
3611 }
3612 #endif
3613 return false;
3614 }
3615 // Note that the JVM state at this point does not include the
3616 // getCallerClass() frame which we are trying to inline. The
3617 // semantics of getCallerClass(), however, are that the "first"
3618 // frame is the getCallerClass() frame, so we subtract one from the
3619 // requested depth before continuing. We don't inline requests of
3620 // getCallerClass(0).
3621 int caller_depth = caller_depth_type->get_con() - 1;
3622 if (caller_depth < 0) {
3623 #ifndef PRODUCT
3624 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) {
3625 tty->print_cr(" Bailing out because caller depth was %d", caller_depth);
3626 }
3627 #endif
3628 return false;
3629 }
3630
3631 if (!jvms()->has_method()) {
3632 #ifndef PRODUCT
3633 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) {
3634 tty->print_cr(" Bailing out because intrinsic was inlined at top level");
3635 }
3636 #endif
3637 return false;
3638 }
3639 int _depth = jvms()->depth(); // cache call chain depth
3640
3641 // Walk back up the JVM state to find the caller at the required
3642 // depth. NOTE that this code must perform the same logic as
3643 // vframeStream::security_get_caller_frame in that it must skip
3644 // Method.invoke() and auxiliary frames. Note also that depth is
3645 // 1-based (1 is the bottom of the inlining).
3646 int inlining_depth = _depth;
3647 JVMState* caller_jvms = NULL;
3648
3649 if (inlining_depth > 0) {
3650 caller_jvms = jvms();
3651 assert(caller_jvms = jvms()->of_depth(inlining_depth), "inlining_depth == our depth");
3652 do {
3653 // The following if-tests should be performed in this order
3654 if (is_method_invoke_or_aux_frame(caller_jvms)) {
3655 // Skip a Method.invoke() or auxiliary frame
3656 } else if (caller_depth > 0) {
3657 // Skip real frame
3658 --caller_depth;
3659 } else {
3660 // We're done: reached desired caller after skipping.
3661 break;
3662 }
3663 caller_jvms = caller_jvms->caller();
3664 --inlining_depth;
3665 } while (inlining_depth > 0);
3666 }
3667
3668 if (inlining_depth == 0) {
3669 #ifndef PRODUCT
3670 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) {
3671 tty->print_cr(" Bailing out because caller depth (%d) exceeded inlining depth (%d)", caller_depth_type->get_con(), _depth);
3672 tty->print_cr(" JVM state at this point:");
3673 for (int i = _depth; i >= 1; i--) {
3674 tty->print_cr(" %d) %s", i, jvms()->of_depth(i)->method()->name()->as_utf8());
3675 }
3676 }
3677 #endif
3678 return false; // Reached end of inlining
3679 }
3680
3681 // Acquire method holder as java.lang.Class
3682 ciInstanceKlass* caller_klass = caller_jvms->method()->holder();
3683 ciInstance* caller_mirror = caller_klass->java_mirror();
3684 // Push this as a constant
3685 push(makecon(TypeInstPtr::make(caller_mirror)));
3686 #ifndef PRODUCT
3687 if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) {
3688 tty->print_cr(" Succeeded: caller = %s.%s, caller depth = %d, depth = %d", caller_klass->name()->as_utf8(), caller_jvms->method()->name()->as_utf8(), caller_depth_type->get_con(), _depth);
3689 tty->print_cr(" JVM state at this point:");
3690 for (int i = _depth; i >= 1; i--) {
3691 tty->print_cr(" %d) %s", i, jvms()->of_depth(i)->method()->name()->as_utf8());
3692 }
3693 }
3694 #endif
3695 return true;
3696 }
3697
3698 // Helper routine for above
3699 bool LibraryCallKit::is_method_invoke_or_aux_frame(JVMState* jvms) {
3700 // Is this the Method.invoke method itself?
3701 if (jvms->method()->intrinsic_id() == vmIntrinsics::_invoke)
3702 return true;
3703
3704 // Is this a helper, defined somewhere underneath MethodAccessorImpl.
3705 ciKlass* k = jvms->method()->holder();
3706 if (k->is_instance_klass()) {
3707 ciInstanceKlass* ik = k->as_instance_klass();
3708 for (; ik != NULL; ik = ik->super()) {
3709 if (ik->name() == ciSymbol::sun_reflect_MethodAccessorImpl() &&
3710 ik == env()->find_system_klass(ik->name())) {
3711 return true;
3712 }
3713 }
3714 }
3715
3716 return false;
3717 }
3718
3719 static int value_field_offset = -1; // offset of the "value" field of AtomicLongCSImpl. This is needed by
3720 // inline_native_AtomicLong_attemptUpdate() but it has no way of
3721 // computing it since there is no lookup field by name function in the
3722 // CI interface. This is computed and set by inline_native_AtomicLong_get().
3723 // Using a static variable here is safe even if we have multiple compilation
3724 // threads because the offset is constant. At worst the same offset will be
3725 // computed and stored multiple
3726
3727 bool LibraryCallKit::inline_native_AtomicLong_get() {
3728 // Restore the stack and pop off the argument
3729 _sp+=1;
3730 Node *obj = pop();
3731
3732 // get the offset of the "value" field. Since the CI interfaces
3733 // does not provide a way to look up a field by name, we scan the bytecodes
3734 // to get the field index. We expect the first 2 instructions of the method
3735 // to be:
3736 // 0 aload_0
3737 // 1 getfield "value"
3738 ciMethod* method = callee();
3739 if (value_field_offset == -1)
3740 {
3741 ciField* value_field;
3742 ciBytecodeStream iter(method);
3743 Bytecodes::Code bc = iter.next();
3744
3745 if ((bc != Bytecodes::_aload_0) &&
3746 ((bc != Bytecodes::_aload) || (iter.get_index() != 0)))
3747 return false;
3748 bc = iter.next();
3749 if (bc != Bytecodes::_getfield)
3750 return false;
3751 bool ignore;
3752 value_field = iter.get_field(ignore);
3753 value_field_offset = value_field->offset_in_bytes();
3754 }
3755
3756 // Null check without removing any arguments.
3757 _sp++;
3758 obj = do_null_check(obj, T_OBJECT);
3759 _sp--;
3760 // Check for locking null object
3761 if (stopped()) return true;
3762
3763 Node *adr = basic_plus_adr(obj, obj, value_field_offset);
3764 const TypePtr *adr_type = _gvn.type(adr)->is_ptr();
3765 int alias_idx = C->get_alias_index(adr_type);
3766
3767 Node *result = _gvn.transform(new (C, 3) LoadLLockedNode(control(), memory(alias_idx), adr));
3768
3769 push_pair(result);
3770
3771 return true;
3772 }
3773
3774 bool LibraryCallKit::inline_native_AtomicLong_attemptUpdate() {
3775 // Restore the stack and pop off the arguments
3776 _sp+=5;
3777 Node *newVal = pop_pair();
3778 Node *oldVal = pop_pair();
3779 Node *obj = pop();
3780
3781 // we need the offset of the "value" field which was computed when
3782 // inlining the get() method. Give up if we don't have it.
3783 if (value_field_offset == -1)
3784 return false;
3785
3786 // Null check without removing any arguments.
3787 _sp+=5;
3788 obj = do_null_check(obj, T_OBJECT);
3789 _sp-=5;
3790 // Check for locking null object
3791 if (stopped()) return true;
3792
3793 Node *adr = basic_plus_adr(obj, obj, value_field_offset);
3794 const TypePtr *adr_type = _gvn.type(adr)->is_ptr();
3795 int alias_idx = C->get_alias_index(adr_type);
3796
3797 Node *cas = _gvn.transform(new (C, 5) StoreLConditionalNode(control(), memory(alias_idx), adr, newVal, oldVal));
3798 Node *store_proj = _gvn.transform( new (C, 1) SCMemProjNode(cas));
3799 set_memory(store_proj, alias_idx);
3800 Node *bol = _gvn.transform( new (C, 2) BoolNode( cas, BoolTest::eq ) );
3801
3802 Node *result;
3803 // CMove node is not used to be able fold a possible check code
3804 // after attemptUpdate() call. This code could be transformed
3805 // into CMove node by loop optimizations.
3806 {
3807 RegionNode *r = new (C, 3) RegionNode(3);
3808 result = new (C, 3) PhiNode(r, TypeInt::BOOL);
3809
3810 Node *iff = create_and_xform_if(control(), bol, PROB_FAIR, COUNT_UNKNOWN);
3811 Node *iftrue = opt_iff(r, iff);
3812 r->init_req(1, iftrue);
3813 result->init_req(1, intcon(1));
3814 result->init_req(2, intcon(0));
3815
3816 set_control(_gvn.transform(r));
3817 record_for_igvn(r);
3818
3819 C->set_has_split_ifs(true); // Has chance for split-if optimization
3820 }
3821
3822 push(_gvn.transform(result));
3823 return true;
3824 }
3825
3826 bool LibraryCallKit::inline_fp_conversions(vmIntrinsics::ID id) {
3827 // restore the arguments
3828 _sp += arg_size();
3829
3830 switch (id) {
3831 case vmIntrinsics::_floatToRawIntBits:
3832 push(_gvn.transform( new (C, 2) MoveF2INode(pop())));
3833 break;
3834
3835 case vmIntrinsics::_intBitsToFloat:
3836 push(_gvn.transform( new (C, 2) MoveI2FNode(pop())));
3837 break;
3838
3839 case vmIntrinsics::_doubleToRawLongBits:
3840 push_pair(_gvn.transform( new (C, 2) MoveD2LNode(pop_pair())));
3841 break;
3842
3843 case vmIntrinsics::_longBitsToDouble:
3844 push_pair(_gvn.transform( new (C, 2) MoveL2DNode(pop_pair())));
3845 break;
3846
3847 case vmIntrinsics::_doubleToLongBits: {
3848 Node* value = pop_pair();
3849
3850 // two paths (plus control) merge in a wood
3851 RegionNode *r = new (C, 3) RegionNode(3);
3852 Node *phi = new (C, 3) PhiNode(r, TypeLong::LONG);
3853
3854 Node *cmpisnan = _gvn.transform( new (C, 3) CmpDNode(value, value));
3855 // Build the boolean node
3856 Node *bolisnan = _gvn.transform( new (C, 2) BoolNode( cmpisnan, BoolTest::ne ) );
3857
3858 // Branch either way.
3859 // NaN case is less traveled, which makes all the difference.
3860 IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN);
3861 Node *opt_isnan = _gvn.transform(ifisnan);
3862 assert( opt_isnan->is_If(), "Expect an IfNode");
3863 IfNode *opt_ifisnan = (IfNode*)opt_isnan;
3864 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(opt_ifisnan) );
3865
3866 set_control(iftrue);
3867
3868 static const jlong nan_bits = CONST64(0x7ff8000000000000);
3869 Node *slow_result = longcon(nan_bits); // return NaN
3870 phi->init_req(1, _gvn.transform( slow_result ));
3871 r->init_req(1, iftrue);
3872
3873 // Else fall through
3874 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(opt_ifisnan) );
3875 set_control(iffalse);
3876
3877 phi->init_req(2, _gvn.transform( new (C, 2) MoveD2LNode(value)));
3878 r->init_req(2, iffalse);
3879
3880 // Post merge
3881 set_control(_gvn.transform(r));
3882 record_for_igvn(r);
3883
3884 Node* result = _gvn.transform(phi);
3885 assert(result->bottom_type()->isa_long(), "must be");
3886 push_pair(result);
3887
3888 C->set_has_split_ifs(true); // Has chance for split-if optimization
3889
3890 break;
3891 }
3892
3893 case vmIntrinsics::_floatToIntBits: {
3894 Node* value = pop();
3895
3896 // two paths (plus control) merge in a wood
3897 RegionNode *r = new (C, 3) RegionNode(3);
3898 Node *phi = new (C, 3) PhiNode(r, TypeInt::INT);
3899
3900 Node *cmpisnan = _gvn.transform( new (C, 3) CmpFNode(value, value));
3901 // Build the boolean node
3902 Node *bolisnan = _gvn.transform( new (C, 2) BoolNode( cmpisnan, BoolTest::ne ) );
3903
3904 // Branch either way.
3905 // NaN case is less traveled, which makes all the difference.
3906 IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN);
3907 Node *opt_isnan = _gvn.transform(ifisnan);
3908 assert( opt_isnan->is_If(), "Expect an IfNode");
3909 IfNode *opt_ifisnan = (IfNode*)opt_isnan;
3910 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(opt_ifisnan) );
3911
3912 set_control(iftrue);
3913
3914 static const jint nan_bits = 0x7fc00000;
3915 Node *slow_result = makecon(TypeInt::make(nan_bits)); // return NaN
3916 phi->init_req(1, _gvn.transform( slow_result ));
3917 r->init_req(1, iftrue);
3918
3919 // Else fall through
3920 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(opt_ifisnan) );
3921 set_control(iffalse);
3922
3923 phi->init_req(2, _gvn.transform( new (C, 2) MoveF2INode(value)));
3924 r->init_req(2, iffalse);
3925
3926 // Post merge
3927 set_control(_gvn.transform(r));
3928 record_for_igvn(r);
3929
3930 Node* result = _gvn.transform(phi);
3931 assert(result->bottom_type()->isa_int(), "must be");
3932 push(result);
3933
3934 C->set_has_split_ifs(true); // Has chance for split-if optimization
3935
3936 break;
3937 }
3938
3939 default:
3940 ShouldNotReachHere();
3941 }
3942
3943 return true;
3944 }
3945
3946 #ifdef _LP64
3947 #define XTOP ,top() /*additional argument*/
3948 #else //_LP64
3949 #define XTOP /*no additional argument*/
3950 #endif //_LP64
3951
3952 //----------------------inline_unsafe_copyMemory-------------------------
3953 bool LibraryCallKit::inline_unsafe_copyMemory() {
3954 if (callee()->is_static()) return false; // caller must have the capability!
3955 int nargs = 1 + 5 + 3; // 5 args: (src: ptr,off, dst: ptr,off, size)
3956 assert(signature()->size() == nargs-1, "copy has 5 arguments");
3957 null_check_receiver(callee()); // check then ignore argument(0)
3958 if (stopped()) return true;
3959
3960 C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe".
3961
3962 Node* src_ptr = argument(1);
3963 Node* src_off = ConvL2X(argument(2));
3964 assert(argument(3)->is_top(), "2nd half of long");
3965 Node* dst_ptr = argument(4);
3966 Node* dst_off = ConvL2X(argument(5));
3967 assert(argument(6)->is_top(), "2nd half of long");
3968 Node* size = ConvL2X(argument(7));
3969 assert(argument(8)->is_top(), "2nd half of long");
3970
3971 assert(Unsafe_field_offset_to_byte_offset(11) == 11,
3972 "fieldOffset must be byte-scaled");
3973
3974 Node* src = make_unsafe_address(src_ptr, src_off);
3975 Node* dst = make_unsafe_address(dst_ptr, dst_off);
3976
3977 // Conservatively insert a memory barrier on all memory slices.
3978 // Do not let writes of the copy source or destination float below the copy.
3979 insert_mem_bar(Op_MemBarCPUOrder);
3980
3981 // Call it. Note that the length argument is not scaled.
3982 make_runtime_call(RC_LEAF|RC_NO_FP,
3983 OptoRuntime::fast_arraycopy_Type(),
3984 StubRoutines::unsafe_arraycopy(),
3985 "unsafe_arraycopy",
3986 TypeRawPtr::BOTTOM,
3987 src, dst, size XTOP);
3988
3989 // Do not let reads of the copy destination float above the copy.
3990 insert_mem_bar(Op_MemBarCPUOrder);
3991
3992 return true;
3993 }
3994
3995 //------------------------clone_coping-----------------------------------
3996 // Helper function for inline_native_clone.
3997 void LibraryCallKit::copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array, bool card_mark) {
3998 assert(obj_size != NULL, "");
3999 Node* raw_obj = alloc_obj->in(1);
4000 assert(alloc_obj->is_CheckCastPP() && raw_obj->is_Proj() && raw_obj->in(0)->is_Allocate(), "");
4001 assert(alloc_obj->as_CheckCastPP()->type() != TypeInstPtr::NOTNULL, "should be more precise than Object");
4002
4003 if (ReduceBulkZeroing) {
4004 // We will be completely responsible for initializing this object -
4005 // mark Initialize node as complete.
4006 AllocateNode* alloc = AllocateNode::Ideal_allocation(alloc_obj, &_gvn);
4007 // The object was just allocated - there should be no any stores!
4008 guarantee(alloc != NULL && alloc->maybe_set_complete(&_gvn), "");
4009 }
4010
4011 // Cast to Object for arraycopy.
4012 // We can't use the original CheckCastPP since it should be moved
4013 // after the arraycopy to prevent stores flowing above it.
4014 Node* new_obj = new(C, 2) CheckCastPPNode(alloc_obj->in(0), raw_obj,
4015 TypeInstPtr::NOTNULL);
4016 new_obj = _gvn.transform(new_obj);
4017 // Substitute in the locally valid dest_oop.
4018 replace_in_map(alloc_obj, new_obj);
4019
4020 // Copy the fastest available way.
4021 // TODO: generate fields copies for small objects instead.
4022 Node* src = obj;
4023 Node* dest = new_obj;
4024 Node* size = _gvn.transform(obj_size);
4025
4026 // Exclude the header but include array length to copy by 8 bytes words.
4027 // Can't use base_offset_in_bytes(bt) since basic type is unknown.
4028 int base_off = is_array ? arrayOopDesc::length_offset_in_bytes() :
4029 instanceOopDesc::base_offset_in_bytes();
4030 // base_off:
4031 // 8 - 32-bit VM
4032 // 12 - 64-bit VM, compressed oops
4033 // 16 - 64-bit VM, normal oops
4034 if (base_off % BytesPerLong != 0) {
4035 assert(UseCompressedOops, "");
4036 if (is_array) {
4037 // Exclude length to copy by 8 bytes words.
4038 base_off += sizeof(int);
4039 } else {
4040 // Include klass to copy by 8 bytes words.
4041 base_off = instanceOopDesc::klass_offset_in_bytes();
4042 }
4043 assert(base_off % BytesPerLong == 0, "expect 8 bytes alignment");
4044 }
4045 src = basic_plus_adr(src, base_off);
4046 dest = basic_plus_adr(dest, base_off);
4047
4048 // Compute the length also, if needed:
4049 Node* countx = size;
4050 countx = _gvn.transform( new (C, 3) SubXNode(countx, MakeConX(base_off)) );
4051 countx = _gvn.transform( new (C, 3) URShiftXNode(countx, intcon(LogBytesPerLong) ));
4052
4053 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM;
4054 bool disjoint_bases = true;
4055 generate_unchecked_arraycopy(raw_adr_type, T_LONG, disjoint_bases,
4056 src, NULL, dest, NULL, countx);
4057
4058 // If necessary, emit some card marks afterwards. (Non-arrays only.)
4059 if (card_mark) {
4060 assert(!is_array, "");
4061 // Put in store barrier for any and all oops we are sticking
4062 // into this object. (We could avoid this if we could prove
4063 // that the object type contains no oop fields at all.)
4064 Node* no_particular_value = NULL;
4065 Node* no_particular_field = NULL;
4066 int raw_adr_idx = Compile::AliasIdxRaw;
4067 post_barrier(control(),
4068 memory(raw_adr_type),
4069 new_obj,
4070 no_particular_field,
4071 raw_adr_idx,
4072 no_particular_value,
4073 T_OBJECT,
4074 false);
4075 }
4076
4077 // Move the original CheckCastPP after arraycopy.
4078 _gvn.hash_delete(alloc_obj);
4079 alloc_obj->set_req(0, control());
4080 // Replace raw memory edge with new CheckCastPP to have a live oop
4081 // at safepoints instead of raw value.
4082 assert(new_obj->is_CheckCastPP() && new_obj->in(1) == alloc_obj->in(1), "sanity");
4083 alloc_obj->set_req(1, new_obj); // cast to the original type
4084 _gvn.hash_find_insert(alloc_obj); // put back into GVN table
4085 // Restore in the locally valid dest_oop.
4086 replace_in_map(new_obj, alloc_obj);
4087 }
4088
4089 //------------------------inline_native_clone----------------------------
4090 // Here are the simple edge cases:
4091 // null receiver => normal trap
4092 // virtual and clone was overridden => slow path to out-of-line clone
4093 // not cloneable or finalizer => slow path to out-of-line Object.clone
4094 //
4095 // The general case has two steps, allocation and copying.
4096 // Allocation has two cases, and uses GraphKit::new_instance or new_array.
4097 //
4098 // Copying also has two cases, oop arrays and everything else.
4099 // Oop arrays use arrayof_oop_arraycopy (same as System.arraycopy).
4100 // Everything else uses the tight inline loop supplied by CopyArrayNode.
4101 //
4102 // These steps fold up nicely if and when the cloned object's klass
4103 // can be sharply typed as an object array, a type array, or an instance.
4104 //
4105 bool LibraryCallKit::inline_native_clone(bool is_virtual) {
4106 int nargs = 1;
4107 PhiNode* result_val;
4108
4109 //set the original stack and the reexecute bit for the interpreter to reexecute
4110 //the bytecode that invokes Object.clone if deoptimization happens
4111 { PreserveReexecuteState preexecs(this);
4112 jvms()->set_should_reexecute(true);
4113
4114 //null_check_receiver will adjust _sp (push and pop)
4115 Node* obj = null_check_receiver(callee());
4116 if (stopped()) return true;
4117
4118 _sp += nargs;
4119
4120 Node* obj_klass = load_object_klass(obj);
4121 const TypeKlassPtr* tklass = _gvn.type(obj_klass)->isa_klassptr();
4122 const TypeOopPtr* toop = ((tklass != NULL)
4123 ? tklass->as_instance_type()
4124 : TypeInstPtr::NOTNULL);
4125
4126 // Conservatively insert a memory barrier on all memory slices.
4127 // Do not let writes into the original float below the clone.
4128 insert_mem_bar(Op_MemBarCPUOrder);
4129
4130 // paths into result_reg:
4131 enum {
4132 _slow_path = 1, // out-of-line call to clone method (virtual or not)
4133 _objArray_path, // plain array allocation, plus arrayof_oop_arraycopy
4134 _array_path, // plain array allocation, plus arrayof_long_arraycopy
4135 _instance_path, // plain instance allocation, plus arrayof_long_arraycopy
4136 PATH_LIMIT
4137 };
4138 RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT);
4139 result_val = new(C, PATH_LIMIT) PhiNode(result_reg,
4140 TypeInstPtr::NOTNULL);
4141 PhiNode* result_i_o = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO);
4142 PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY,
4143 TypePtr::BOTTOM);
4144 record_for_igvn(result_reg);
4145
4146 const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM;
4147 int raw_adr_idx = Compile::AliasIdxRaw;
4148 const bool raw_mem_only = true;
4149
4150
4151 Node* array_ctl = generate_array_guard(obj_klass, (RegionNode*)NULL);
4152 if (array_ctl != NULL) {
4153 // It's an array.
4154 PreserveJVMState pjvms(this);
4155 set_control(array_ctl);
4156 Node* obj_length = load_array_length(obj);
4157 Node* obj_size = NULL;
4158 Node* alloc_obj = new_array(obj_klass, obj_length, 0,
4159 raw_mem_only, &obj_size);
4160
4161 if (!use_ReduceInitialCardMarks()) {
4162 // If it is an oop array, it requires very special treatment,
4163 // because card marking is required on each card of the array.
4164 Node* is_obja = generate_objArray_guard(obj_klass, (RegionNode*)NULL);
4165 if (is_obja != NULL) {
4166 PreserveJVMState pjvms2(this);
4167 set_control(is_obja);
4168 // Generate a direct call to the right arraycopy function(s).
4169 bool disjoint_bases = true;
4170 bool length_never_negative = true;
4171 generate_arraycopy(TypeAryPtr::OOPS, T_OBJECT,
4172 obj, intcon(0), alloc_obj, intcon(0),
4173 obj_length,
4174 disjoint_bases, length_never_negative);
4175 result_reg->init_req(_objArray_path, control());
4176 result_val->init_req(_objArray_path, alloc_obj);
4177 result_i_o ->set_req(_objArray_path, i_o());
4178 result_mem ->set_req(_objArray_path, reset_memory());
4179 }
4180 }
4181 // We can dispense with card marks if we know the allocation
4182 // comes out of eden (TLAB)... In fact, ReduceInitialCardMarks
4183 // causes the non-eden paths to simulate a fresh allocation,
4184 // insofar that no further card marks are required to initialize
4185 // the object.
4186
4187 // Otherwise, there are no card marks to worry about.
4188
4189 if (!stopped()) {
4190 copy_to_clone(obj, alloc_obj, obj_size, true, false);
4191
4192 // Present the results of the copy.
4193 result_reg->init_req(_array_path, control());
4194 result_val->init_req(_array_path, alloc_obj);
4195 result_i_o ->set_req(_array_path, i_o());
4196 result_mem ->set_req(_array_path, reset_memory());
4197 }
4198 }
4199
4200 // We only go to the instance fast case code if we pass a number of guards.
4201 // The paths which do not pass are accumulated in the slow_region.
4202 RegionNode* slow_region = new (C, 1) RegionNode(1);
4203 record_for_igvn(slow_region);
4204 if (!stopped()) {
4205 // It's an instance (we did array above). Make the slow-path tests.
4206 // If this is a virtual call, we generate a funny guard. We grab
4207 // the vtable entry corresponding to clone() from the target object.
4208 // If the target method which we are calling happens to be the
4209 // Object clone() method, we pass the guard. We do not need this
4210 // guard for non-virtual calls; the caller is known to be the native
4211 // Object clone().
4212 if (is_virtual) {
4213 generate_virtual_guard(obj_klass, slow_region);
4214 }
4215
4216 // The object must be cloneable and must not have a finalizer.
4217 // Both of these conditions may be checked in a single test.
4218 // We could optimize the cloneable test further, but we don't care.
4219 generate_access_flags_guard(obj_klass,
4220 // Test both conditions:
4221 JVM_ACC_IS_CLONEABLE | JVM_ACC_HAS_FINALIZER,
4222 // Must be cloneable but not finalizer:
4223 JVM_ACC_IS_CLONEABLE,
4224 slow_region);
4225 }
4226
4227 if (!stopped()) {
4228 // It's an instance, and it passed the slow-path tests.
4229 PreserveJVMState pjvms(this);
4230 Node* obj_size = NULL;
4231 Node* alloc_obj = new_instance(obj_klass, NULL, raw_mem_only, &obj_size);
4232
4233 copy_to_clone(obj, alloc_obj, obj_size, false, !use_ReduceInitialCardMarks());
4234
4235 // Present the results of the slow call.
4236 result_reg->init_req(_instance_path, control());
4237 result_val->init_req(_instance_path, alloc_obj);
4238 result_i_o ->set_req(_instance_path, i_o());
4239 result_mem ->set_req(_instance_path, reset_memory());
4240 }
4241
4242 // Generate code for the slow case. We make a call to clone().
4243 set_control(_gvn.transform(slow_region));
4244 if (!stopped()) {
4245 PreserveJVMState pjvms(this);
4246 CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_clone, is_virtual);
4247 Node* slow_result = set_results_for_java_call(slow_call);
4248 // this->control() comes from set_results_for_java_call
4249 result_reg->init_req(_slow_path, control());
4250 result_val->init_req(_slow_path, slow_result);
4251 result_i_o ->set_req(_slow_path, i_o());
4252 result_mem ->set_req(_slow_path, reset_memory());
4253 }
4254
4255 // Return the combined state.
4256 set_control( _gvn.transform(result_reg) );
4257 set_i_o( _gvn.transform(result_i_o) );
4258 set_all_memory( _gvn.transform(result_mem) );
4259 } //original reexecute and sp are set back here
4260
4261 push(_gvn.transform(result_val));
4262
4263 return true;
4264 }
4265
4266
4267 // constants for computing the copy function
4268 enum {
4269 COPYFUNC_UNALIGNED = 0,
4270 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
4271 COPYFUNC_CONJOINT = 0,
4272 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
4273 };
4274
4275 // Note: The condition "disjoint" applies also for overlapping copies
4276 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
4277 static address
4278 select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name) {
4279 int selector =
4280 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
4281 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
4282
4283 #define RETURN_STUB(xxx_arraycopy) { \
4284 name = #xxx_arraycopy; \
4285 return StubRoutines::xxx_arraycopy(); }
4286
4287 switch (t) {
4288 case T_BYTE:
4289 case T_BOOLEAN:
4290 switch (selector) {
4291 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
4292 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
4293 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
4294 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
4295 }
4296 case T_CHAR:
4297 case T_SHORT:
4298 switch (selector) {
4299 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
4300 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
4301 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
4302 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
4303 }
4304 case T_INT:
4305 case T_FLOAT:
4306 switch (selector) {
4307 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
4308 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
4309 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
4310 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
4311 }
4312 case T_DOUBLE:
4313 case T_LONG:
4314 switch (selector) {
4315 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
4316 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
4317 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
4318 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
4319 }
4320 case T_ARRAY:
4321 case T_OBJECT:
4322 switch (selector) {
4323 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(oop_arraycopy);
4324 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_oop_arraycopy);
4325 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(oop_disjoint_arraycopy);
4326 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_oop_disjoint_arraycopy);
4327 }
4328 default:
4329 ShouldNotReachHere();
4330 return NULL;
4331 }
4332
4333 #undef RETURN_STUB
4334 }
4335
4336 //------------------------------basictype2arraycopy----------------------------
4337 address LibraryCallKit::basictype2arraycopy(BasicType t,
4338 Node* src_offset,
4339 Node* dest_offset,
4340 bool disjoint_bases,
4341 const char* &name) {
4342 const TypeInt* src_offset_inttype = gvn().find_int_type(src_offset);;
4343 const TypeInt* dest_offset_inttype = gvn().find_int_type(dest_offset);;
4344
4345 bool aligned = false;
4346 bool disjoint = disjoint_bases;
4347
4348 // if the offsets are the same, we can treat the memory regions as
4349 // disjoint, because either the memory regions are in different arrays,
4350 // or they are identical (which we can treat as disjoint.) We can also
4351 // treat a copy with a destination index less that the source index
4352 // as disjoint since a low->high copy will work correctly in this case.
4353 if (src_offset_inttype != NULL && src_offset_inttype->is_con() &&
4354 dest_offset_inttype != NULL && dest_offset_inttype->is_con()) {
4355 // both indices are constants
4356 int s_offs = src_offset_inttype->get_con();
4357 int d_offs = dest_offset_inttype->get_con();
4358 int element_size = type2aelembytes(t);
4359 aligned = ((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) &&
4360 ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0);
4361 if (s_offs >= d_offs) disjoint = true;
4362 } else if (src_offset == dest_offset && src_offset != NULL) {
4363 // This can occur if the offsets are identical non-constants.
4364 disjoint = true;
4365 }
4366
4367 return select_arraycopy_function(t, aligned, disjoint, name);
4368 }
4369
4370
4371 //------------------------------inline_arraycopy-----------------------
4372 bool LibraryCallKit::inline_arraycopy() {
4373 // Restore the stack and pop off the arguments.
4374 int nargs = 5; // 2 oops, 3 ints, no size_t or long
4375 assert(callee()->signature()->size() == nargs, "copy has 5 arguments");
4376
4377 Node *src = argument(0);
4378 Node *src_offset = argument(1);
4379 Node *dest = argument(2);
4380 Node *dest_offset = argument(3);
4381 Node *length = argument(4);
4382
4383 // Compile time checks. If any of these checks cannot be verified at compile time,
4384 // we do not make a fast path for this call. Instead, we let the call remain as it
4385 // is. The checks we choose to mandate at compile time are:
4386 //
4387 // (1) src and dest are arrays.
4388 const Type* src_type = src->Value(&_gvn);
4389 const Type* dest_type = dest->Value(&_gvn);
4390 const TypeAryPtr* top_src = src_type->isa_aryptr();
4391 const TypeAryPtr* top_dest = dest_type->isa_aryptr();
4392 if (top_src == NULL || top_src->klass() == NULL ||
4393 top_dest == NULL || top_dest->klass() == NULL) {
4394 // Conservatively insert a memory barrier on all memory slices.
4395 // Do not let writes into the source float below the arraycopy.
4396 insert_mem_bar(Op_MemBarCPUOrder);
4397
4398 // Call StubRoutines::generic_arraycopy stub.
4399 generate_arraycopy(TypeRawPtr::BOTTOM, T_CONFLICT,
4400 src, src_offset, dest, dest_offset, length);
4401
4402 // Do not let reads from the destination float above the arraycopy.
4403 // Since we cannot type the arrays, we don't know which slices
4404 // might be affected. We could restrict this barrier only to those
4405 // memory slices which pertain to array elements--but don't bother.
4406 if (!InsertMemBarAfterArraycopy)
4407 // (If InsertMemBarAfterArraycopy, there is already one in place.)
4408 insert_mem_bar(Op_MemBarCPUOrder);
4409 return true;
4410 }
4411
4412 // (2) src and dest arrays must have elements of the same BasicType
4413 // Figure out the size and type of the elements we will be copying.
4414 BasicType src_elem = top_src->klass()->as_array_klass()->element_type()->basic_type();
4415 BasicType dest_elem = top_dest->klass()->as_array_klass()->element_type()->basic_type();
4416 if (src_elem == T_ARRAY) src_elem = T_OBJECT;
4417 if (dest_elem == T_ARRAY) dest_elem = T_OBJECT;
4418
4419 if (src_elem != dest_elem || dest_elem == T_VOID) {
4420 // The component types are not the same or are not recognized. Punt.
4421 // (But, avoid the native method wrapper to JVM_ArrayCopy.)
4422 generate_slow_arraycopy(TypePtr::BOTTOM,
4423 src, src_offset, dest, dest_offset, length);
4424 return true;
4425 }
4426
4427 //---------------------------------------------------------------------------
4428 // We will make a fast path for this call to arraycopy.
4429
4430 // We have the following tests left to perform:
4431 //
4432 // (3) src and dest must not be null.
4433 // (4) src_offset must not be negative.
4434 // (5) dest_offset must not be negative.
4435 // (6) length must not be negative.
4436 // (7) src_offset + length must not exceed length of src.
4437 // (8) dest_offset + length must not exceed length of dest.
4438 // (9) each element of an oop array must be assignable
4439
4440 RegionNode* slow_region = new (C, 1) RegionNode(1);
4441 record_for_igvn(slow_region);
4442
4443 // (3) operands must not be null
4444 // We currently perform our null checks with the do_null_check routine.
4445 // This means that the null exceptions will be reported in the caller
4446 // rather than (correctly) reported inside of the native arraycopy call.
4447 // This should be corrected, given time. We do our null check with the
4448 // stack pointer restored.
4449 _sp += nargs;
4450 src = do_null_check(src, T_ARRAY);
4451 dest = do_null_check(dest, T_ARRAY);
4452 _sp -= nargs;
4453
4454 // (4) src_offset must not be negative.
4455 generate_negative_guard(src_offset, slow_region);
4456
4457 // (5) dest_offset must not be negative.
4458 generate_negative_guard(dest_offset, slow_region);
4459
4460 // (6) length must not be negative (moved to generate_arraycopy()).
4461 // generate_negative_guard(length, slow_region);
4462
4463 // (7) src_offset + length must not exceed length of src.
4464 generate_limit_guard(src_offset, length,
4465 load_array_length(src),
4466 slow_region);
4467
4468 // (8) dest_offset + length must not exceed length of dest.
4469 generate_limit_guard(dest_offset, length,
4470 load_array_length(dest),
4471 slow_region);
4472
4473 // (9) each element of an oop array must be assignable
4474 // The generate_arraycopy subroutine checks this.
4475
4476 // This is where the memory effects are placed:
4477 const TypePtr* adr_type = TypeAryPtr::get_array_body_type(dest_elem);
4478 generate_arraycopy(adr_type, dest_elem,
4479 src, src_offset, dest, dest_offset, length,
4480 false, false, slow_region);
4481
4482 return true;
4483 }
4484
4485 //-----------------------------generate_arraycopy----------------------
4486 // Generate an optimized call to arraycopy.
4487 // Caller must guard against non-arrays.
4488 // Caller must determine a common array basic-type for both arrays.
4489 // Caller must validate offsets against array bounds.
4490 // The slow_region has already collected guard failure paths
4491 // (such as out of bounds length or non-conformable array types).
4492 // The generated code has this shape, in general:
4493 //
4494 // if (length == 0) return // via zero_path
4495 // slowval = -1
4496 // if (types unknown) {
4497 // slowval = call generic copy loop
4498 // if (slowval == 0) return // via checked_path
4499 // } else if (indexes in bounds) {
4500 // if ((is object array) && !(array type check)) {
4501 // slowval = call checked copy loop
4502 // if (slowval == 0) return // via checked_path
4503 // } else {
4504 // call bulk copy loop
4505 // return // via fast_path
4506 // }
4507 // }
4508 // // adjust params for remaining work:
4509 // if (slowval != -1) {
4510 // n = -1^slowval; src_offset += n; dest_offset += n; length -= n
4511 // }
4512 // slow_region:
4513 // call slow arraycopy(src, src_offset, dest, dest_offset, length)
4514 // return // via slow_call_path
4515 //
4516 // This routine is used from several intrinsics: System.arraycopy,
4517 // Object.clone (the array subcase), and Arrays.copyOf[Range].
4518 //
4519 void
4520 LibraryCallKit::generate_arraycopy(const TypePtr* adr_type,
4521 BasicType basic_elem_type,
4522 Node* src, Node* src_offset,
4523 Node* dest, Node* dest_offset,
4524 Node* copy_length,
4525 bool disjoint_bases,
4526 bool length_never_negative,
4527 RegionNode* slow_region) {
4528
4529 if (slow_region == NULL) {
4530 slow_region = new(C,1) RegionNode(1);
4531 record_for_igvn(slow_region);
4532 }
4533
4534 Node* original_dest = dest;
4535 AllocateArrayNode* alloc = NULL; // used for zeroing, if needed
4536 bool must_clear_dest = false;
4537
4538 // See if this is the initialization of a newly-allocated array.
4539 // If so, we will take responsibility here for initializing it to zero.
4540 // (Note: Because tightly_coupled_allocation performs checks on the
4541 // out-edges of the dest, we need to avoid making derived pointers
4542 // from it until we have checked its uses.)
4543 if (ReduceBulkZeroing
4544 && !ZeroTLAB // pointless if already zeroed
4545 && basic_elem_type != T_CONFLICT // avoid corner case
4546 && !_gvn.eqv_uncast(src, dest)
4547 && ((alloc = tightly_coupled_allocation(dest, slow_region))
4548 != NULL)
4549 && _gvn.find_int_con(alloc->in(AllocateNode::ALength), 1) > 0
4550 && alloc->maybe_set_complete(&_gvn)) {
4551 // "You break it, you buy it."
4552 InitializeNode* init = alloc->initialization();
4553 assert(init->is_complete(), "we just did this");
4554 assert(dest->is_CheckCastPP(), "sanity");
4555 assert(dest->as_CheckCastPP()->type() != TypeInstPtr::NOTNULL, "type should be more precise than Object");
4556 assert(dest->in(0)->in(0) == init, "dest pinned");
4557
4558 // Cast to Object for arraycopy.
4559 // We can't use the original CheckCastPP since it should be moved
4560 // after the arraycopy to prevent stores flowing above it.
4561 Node* new_obj = new(C, 2) CheckCastPPNode(dest->in(0), dest->in(1),
4562 TypeInstPtr::NOTNULL);
4563 dest = _gvn.transform(new_obj);
4564 // Substitute in the locally valid dest_oop.
4565 replace_in_map(original_dest, dest);
4566 adr_type = TypeRawPtr::BOTTOM; // all initializations are into raw memory
4567 // From this point on, every exit path is responsible for
4568 // initializing any non-copied parts of the object to zero.
4569 must_clear_dest = true;
4570 } else {
4571 // No zeroing elimination here.
4572 alloc = NULL;
4573 //original_dest = dest;
4574 //must_clear_dest = false;
4575 }
4576
4577 // Results are placed here:
4578 enum { fast_path = 1, // normal void-returning assembly stub
4579 checked_path = 2, // special assembly stub with cleanup
4580 slow_call_path = 3, // something went wrong; call the VM
4581 zero_path = 4, // bypass when length of copy is zero
4582 bcopy_path = 5, // copy primitive array by 64-bit blocks
4583 PATH_LIMIT = 6
4584 };
4585 RegionNode* result_region = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT);
4586 PhiNode* result_i_o = new(C, PATH_LIMIT) PhiNode(result_region, Type::ABIO);
4587 PhiNode* result_memory = new(C, PATH_LIMIT) PhiNode(result_region, Type::MEMORY, adr_type);
4588 record_for_igvn(result_region);
4589 _gvn.set_type_bottom(result_i_o);
4590 _gvn.set_type_bottom(result_memory);
4591 assert(adr_type != TypePtr::BOTTOM, "must be RawMem or a T[] slice");
4592
4593 // The slow_control path:
4594 Node* slow_control;
4595 Node* slow_i_o = i_o();
4596 Node* slow_mem = memory(adr_type);
4597 debug_only(slow_control = (Node*) badAddress);
4598
4599 // Checked control path:
4600 Node* checked_control = top();
4601 Node* checked_mem = NULL;
4602 Node* checked_i_o = NULL;
4603 Node* checked_value = NULL;
4604
4605 if (basic_elem_type == T_CONFLICT) {
4606 assert(!must_clear_dest, "");
4607 Node* cv = generate_generic_arraycopy(adr_type,
4608 src, src_offset, dest, dest_offset,
4609 copy_length);
4610 if (cv == NULL) cv = intcon(-1); // failure (no stub available)
4611 checked_control = control();
4612 checked_i_o = i_o();
4613 checked_mem = memory(adr_type);
4614 checked_value = cv;
4615 set_control(top()); // no fast path
4616 }
4617
4618 Node* not_pos = generate_nonpositive_guard(copy_length, length_never_negative);
4619 if (not_pos != NULL) {
4620 PreserveJVMState pjvms(this);
4621 set_control(not_pos);
4622
4623 // (6) length must not be negative.
4624 if (!length_never_negative) {
4625 generate_negative_guard(copy_length, slow_region);
4626 }
4627
4628 // copy_length is 0.
4629 if (!stopped() && must_clear_dest) {
4630 Node* dest_length = alloc->in(AllocateNode::ALength);
4631 if (_gvn.eqv_uncast(copy_length, dest_length)
4632 || _gvn.find_int_con(dest_length, 1) <= 0) {
4633 // There is no zeroing to do. No need for a secondary raw memory barrier.
4634 } else {
4635 // Clear the whole thing since there are no source elements to copy.
4636 generate_clear_array(adr_type, dest, basic_elem_type,
4637 intcon(0), NULL,
4638 alloc->in(AllocateNode::AllocSize));
4639 // Use a secondary InitializeNode as raw memory barrier.
4640 // Currently it is needed only on this path since other
4641 // paths have stub or runtime calls as raw memory barriers.
4642 InitializeNode* init = insert_mem_bar_volatile(Op_Initialize,
4643 Compile::AliasIdxRaw,
4644 top())->as_Initialize();
4645 init->set_complete(&_gvn); // (there is no corresponding AllocateNode)
4646 }
4647 }
4648
4649 // Present the results of the fast call.
4650 result_region->init_req(zero_path, control());
4651 result_i_o ->init_req(zero_path, i_o());
4652 result_memory->init_req(zero_path, memory(adr_type));
4653 }
4654
4655 if (!stopped() && must_clear_dest) {
4656 // We have to initialize the *uncopied* part of the array to zero.
4657 // The copy destination is the slice dest[off..off+len]. The other slices
4658 // are dest_head = dest[0..off] and dest_tail = dest[off+len..dest.length].
4659 Node* dest_size = alloc->in(AllocateNode::AllocSize);
4660 Node* dest_length = alloc->in(AllocateNode::ALength);
4661 Node* dest_tail = _gvn.transform( new(C,3) AddINode(dest_offset,
4662 copy_length) );
4663
4664 // If there is a head section that needs zeroing, do it now.
4665 if (find_int_con(dest_offset, -1) != 0) {
4666 generate_clear_array(adr_type, dest, basic_elem_type,
4667 intcon(0), dest_offset,
4668 NULL);
4669 }
4670
4671 // Next, perform a dynamic check on the tail length.
4672 // It is often zero, and we can win big if we prove this.
4673 // There are two wins: Avoid generating the ClearArray
4674 // with its attendant messy index arithmetic, and upgrade
4675 // the copy to a more hardware-friendly word size of 64 bits.
4676 Node* tail_ctl = NULL;
4677 if (!stopped() && !_gvn.eqv_uncast(dest_tail, dest_length)) {
4678 Node* cmp_lt = _gvn.transform( new(C,3) CmpINode(dest_tail, dest_length) );
4679 Node* bol_lt = _gvn.transform( new(C,2) BoolNode(cmp_lt, BoolTest::lt) );
4680 tail_ctl = generate_slow_guard(bol_lt, NULL);
4681 assert(tail_ctl != NULL || !stopped(), "must be an outcome");
4682 }
4683
4684 // At this point, let's assume there is no tail.
4685 if (!stopped() && alloc != NULL && basic_elem_type != T_OBJECT) {
4686 // There is no tail. Try an upgrade to a 64-bit copy.
4687 bool didit = false;
4688 { PreserveJVMState pjvms(this);
4689 didit = generate_block_arraycopy(adr_type, basic_elem_type, alloc,
4690 src, src_offset, dest, dest_offset,
4691 dest_size);
4692 if (didit) {
4693 // Present the results of the block-copying fast call.
4694 result_region->init_req(bcopy_path, control());
4695 result_i_o ->init_req(bcopy_path, i_o());
4696 result_memory->init_req(bcopy_path, memory(adr_type));
4697 }
4698 }
4699 if (didit)
4700 set_control(top()); // no regular fast path
4701 }
4702
4703 // Clear the tail, if any.
4704 if (tail_ctl != NULL) {
4705 Node* notail_ctl = stopped() ? NULL : control();
4706 set_control(tail_ctl);
4707 if (notail_ctl == NULL) {
4708 generate_clear_array(adr_type, dest, basic_elem_type,
4709 dest_tail, NULL,
4710 dest_size);
4711 } else {
4712 // Make a local merge.
4713 Node* done_ctl = new(C,3) RegionNode(3);
4714 Node* done_mem = new(C,3) PhiNode(done_ctl, Type::MEMORY, adr_type);
4715 done_ctl->init_req(1, notail_ctl);
4716 done_mem->init_req(1, memory(adr_type));
4717 generate_clear_array(adr_type, dest, basic_elem_type,
4718 dest_tail, NULL,
4719 dest_size);
4720 done_ctl->init_req(2, control());
4721 done_mem->init_req(2, memory(adr_type));
4722 set_control( _gvn.transform(done_ctl) );
4723 set_memory( _gvn.transform(done_mem), adr_type );
4724 }
4725 }
4726 }
4727
4728 BasicType copy_type = basic_elem_type;
4729 assert(basic_elem_type != T_ARRAY, "caller must fix this");
4730 if (!stopped() && copy_type == T_OBJECT) {
4731 // If src and dest have compatible element types, we can copy bits.
4732 // Types S[] and D[] are compatible if D is a supertype of S.
4733 //
4734 // If they are not, we will use checked_oop_disjoint_arraycopy,
4735 // which performs a fast optimistic per-oop check, and backs off
4736 // further to JVM_ArrayCopy on the first per-oop check that fails.
4737 // (Actually, we don't move raw bits only; the GC requires card marks.)
4738
4739 // Get the klassOop for both src and dest
4740 Node* src_klass = load_object_klass(src);
4741 Node* dest_klass = load_object_klass(dest);
4742
4743 // Generate the subtype check.
4744 // This might fold up statically, or then again it might not.
4745 //
4746 // Non-static example: Copying List<String>.elements to a new String[].
4747 // The backing store for a List<String> is always an Object[],
4748 // but its elements are always type String, if the generic types
4749 // are correct at the source level.
4750 //
4751 // Test S[] against D[], not S against D, because (probably)
4752 // the secondary supertype cache is less busy for S[] than S.
4753 // This usually only matters when D is an interface.
4754 Node* not_subtype_ctrl = gen_subtype_check(src_klass, dest_klass);
4755 // Plug failing path into checked_oop_disjoint_arraycopy
4756 if (not_subtype_ctrl != top()) {
4757 PreserveJVMState pjvms(this);
4758 set_control(not_subtype_ctrl);
4759 // (At this point we can assume disjoint_bases, since types differ.)
4760 int ek_offset = objArrayKlass::element_klass_offset_in_bytes() + sizeof(oopDesc);
4761 Node* p1 = basic_plus_adr(dest_klass, ek_offset);
4762 Node* n1 = LoadKlassNode::make(_gvn, immutable_memory(), p1, TypeRawPtr::BOTTOM);
4763 Node* dest_elem_klass = _gvn.transform(n1);
4764 Node* cv = generate_checkcast_arraycopy(adr_type,
4765 dest_elem_klass,
4766 src, src_offset, dest, dest_offset,
4767 copy_length);
4768 if (cv == NULL) cv = intcon(-1); // failure (no stub available)
4769 checked_control = control();
4770 checked_i_o = i_o();
4771 checked_mem = memory(adr_type);
4772 checked_value = cv;
4773 }
4774 // At this point we know we do not need type checks on oop stores.
4775
4776 // Let's see if we need card marks:
4777 if (alloc != NULL && use_ReduceInitialCardMarks()) {
4778 // If we do not need card marks, copy using the jint or jlong stub.
4779 copy_type = LP64_ONLY(UseCompressedOops ? T_INT : T_LONG) NOT_LP64(T_INT);
4780 assert(type2aelembytes(basic_elem_type) == type2aelembytes(copy_type),
4781 "sizes agree");
4782 }
4783 }
4784
4785 if (!stopped()) {
4786 // Generate the fast path, if possible.
4787 PreserveJVMState pjvms(this);
4788 generate_unchecked_arraycopy(adr_type, copy_type, disjoint_bases,
4789 src, src_offset, dest, dest_offset,
4790 ConvI2X(copy_length));
4791
4792 // Present the results of the fast call.
4793 result_region->init_req(fast_path, control());
4794 result_i_o ->init_req(fast_path, i_o());
4795 result_memory->init_req(fast_path, memory(adr_type));
4796 }
4797
4798 // Here are all the slow paths up to this point, in one bundle:
4799 slow_control = top();
4800 if (slow_region != NULL)
4801 slow_control = _gvn.transform(slow_region);
4802 debug_only(slow_region = (RegionNode*)badAddress);
4803
4804 set_control(checked_control);
4805 if (!stopped()) {
4806 // Clean up after the checked call.
4807 // The returned value is either 0 or -1^K,
4808 // where K = number of partially transferred array elements.
4809 Node* cmp = _gvn.transform( new(C, 3) CmpINode(checked_value, intcon(0)) );
4810 Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::eq) );
4811 IfNode* iff = create_and_map_if(control(), bol, PROB_MAX, COUNT_UNKNOWN);
4812
4813 // If it is 0, we are done, so transfer to the end.
4814 Node* checks_done = _gvn.transform( new(C, 1) IfTrueNode(iff) );
4815 result_region->init_req(checked_path, checks_done);
4816 result_i_o ->init_req(checked_path, checked_i_o);
4817 result_memory->init_req(checked_path, checked_mem);
4818
4819 // If it is not zero, merge into the slow call.
4820 set_control( _gvn.transform( new(C, 1) IfFalseNode(iff) ));
4821 RegionNode* slow_reg2 = new(C, 3) RegionNode(3);
4822 PhiNode* slow_i_o2 = new(C, 3) PhiNode(slow_reg2, Type::ABIO);
4823 PhiNode* slow_mem2 = new(C, 3) PhiNode(slow_reg2, Type::MEMORY, adr_type);
4824 record_for_igvn(slow_reg2);
4825 slow_reg2 ->init_req(1, slow_control);
4826 slow_i_o2 ->init_req(1, slow_i_o);
4827 slow_mem2 ->init_req(1, slow_mem);
4828 slow_reg2 ->init_req(2, control());
4829 slow_i_o2 ->init_req(2, checked_i_o);
4830 slow_mem2 ->init_req(2, checked_mem);
4831
4832 slow_control = _gvn.transform(slow_reg2);
4833 slow_i_o = _gvn.transform(slow_i_o2);
4834 slow_mem = _gvn.transform(slow_mem2);
4835
4836 if (alloc != NULL) {
4837 // We'll restart from the very beginning, after zeroing the whole thing.
4838 // This can cause double writes, but that's OK since dest is brand new.
4839 // So we ignore the low 31 bits of the value returned from the stub.
4840 } else {
4841 // We must continue the copy exactly where it failed, or else
4842 // another thread might see the wrong number of writes to dest.
4843 Node* checked_offset = _gvn.transform( new(C, 3) XorINode(checked_value, intcon(-1)) );
4844 Node* slow_offset = new(C, 3) PhiNode(slow_reg2, TypeInt::INT);
4845 slow_offset->init_req(1, intcon(0));
4846 slow_offset->init_req(2, checked_offset);
4847 slow_offset = _gvn.transform(slow_offset);
4848
4849 // Adjust the arguments by the conditionally incoming offset.
4850 Node* src_off_plus = _gvn.transform( new(C, 3) AddINode(src_offset, slow_offset) );
4851 Node* dest_off_plus = _gvn.transform( new(C, 3) AddINode(dest_offset, slow_offset) );
4852 Node* length_minus = _gvn.transform( new(C, 3) SubINode(copy_length, slow_offset) );
4853
4854 // Tweak the node variables to adjust the code produced below:
4855 src_offset = src_off_plus;
4856 dest_offset = dest_off_plus;
4857 copy_length = length_minus;
4858 }
4859 }
4860
4861 set_control(slow_control);
4862 if (!stopped()) {
4863 // Generate the slow path, if needed.
4864 PreserveJVMState pjvms(this); // replace_in_map may trash the map
4865
4866 set_memory(slow_mem, adr_type);
4867 set_i_o(slow_i_o);
4868
4869 if (must_clear_dest) {
4870 generate_clear_array(adr_type, dest, basic_elem_type,
4871 intcon(0), NULL,
4872 alloc->in(AllocateNode::AllocSize));
4873 }
4874
4875 generate_slow_arraycopy(adr_type,
4876 src, src_offset, dest, dest_offset,
4877 copy_length);
4878
4879 result_region->init_req(slow_call_path, control());
4880 result_i_o ->init_req(slow_call_path, i_o());
4881 result_memory->init_req(slow_call_path, memory(adr_type));
4882 }
4883
4884 // Remove unused edges.
4885 for (uint i = 1; i < result_region->req(); i++) {
4886 if (result_region->in(i) == NULL)
4887 result_region->init_req(i, top());
4888 }
4889
4890 // Finished; return the combined state.
4891 set_control( _gvn.transform(result_region) );
4892 set_i_o( _gvn.transform(result_i_o) );
4893 set_memory( _gvn.transform(result_memory), adr_type );
4894
4895 if (dest != original_dest) {
4896 // Pin the "finished" array node after the arraycopy/zeroing operations.
4897 _gvn.hash_delete(original_dest);
4898 original_dest->set_req(0, control());
4899 // Replace raw memory edge with new CheckCastPP to have a live oop
4900 // at safepoints instead of raw value.
4901 assert(dest->is_CheckCastPP() && dest->in(1) == original_dest->in(1), "sanity");
4902 original_dest->set_req(1, dest); // cast to the original type
4903 _gvn.hash_find_insert(original_dest); // put back into GVN table
4904 // Restore in the locally valid dest_oop.
4905 replace_in_map(dest, original_dest);
4906 }
4907 // The memory edges above are precise in order to model effects around
4908 // array copies accurately to allow value numbering of field loads around
4909 // arraycopy. Such field loads, both before and after, are common in Java
4910 // collections and similar classes involving header/array data structures.
4911 //
4912 // But with low number of register or when some registers are used or killed
4913 // by arraycopy calls it causes registers spilling on stack. See 6544710.
4914 // The next memory barrier is added to avoid it. If the arraycopy can be
4915 // optimized away (which it can, sometimes) then we can manually remove
4916 // the membar also.
4917 if (InsertMemBarAfterArraycopy)
4918 insert_mem_bar(Op_MemBarCPUOrder);
4919 }
4920
4921
4922 // Helper function which determines if an arraycopy immediately follows
4923 // an allocation, with no intervening tests or other escapes for the object.
4924 AllocateArrayNode*
4925 LibraryCallKit::tightly_coupled_allocation(Node* ptr,
4926 RegionNode* slow_region) {
4927 if (stopped()) return NULL; // no fast path
4928 if (C->AliasLevel() == 0) return NULL; // no MergeMems around
4929
4930 AllocateArrayNode* alloc = AllocateArrayNode::Ideal_array_allocation(ptr, &_gvn);
4931 if (alloc == NULL) return NULL;
4932
4933 Node* rawmem = memory(Compile::AliasIdxRaw);
4934 // Is the allocation's memory state untouched?
4935 if (!(rawmem->is_Proj() && rawmem->in(0)->is_Initialize())) {
4936 // Bail out if there have been raw-memory effects since the allocation.
4937 // (Example: There might have been a call or safepoint.)
4938 return NULL;
4939 }
4940 rawmem = rawmem->in(0)->as_Initialize()->memory(Compile::AliasIdxRaw);
4941 if (!(rawmem->is_Proj() && rawmem->in(0) == alloc)) {
4942 return NULL;
4943 }
4944
4945 // There must be no unexpected observers of this allocation.
4946 for (DUIterator_Fast imax, i = ptr->fast_outs(imax); i < imax; i++) {
4947 Node* obs = ptr->fast_out(i);
4948 if (obs != this->map()) {
4949 return NULL;
4950 }
4951 }
4952
4953 // This arraycopy must unconditionally follow the allocation of the ptr.
4954 Node* alloc_ctl = ptr->in(0);
4955 assert(just_allocated_object(alloc_ctl) == ptr, "most recent allo");
4956
4957 Node* ctl = control();
4958 while (ctl != alloc_ctl) {
4959 // There may be guards which feed into the slow_region.
4960 // Any other control flow means that we might not get a chance
4961 // to finish initializing the allocated object.
4962 if ((ctl->is_IfFalse() || ctl->is_IfTrue()) && ctl->in(0)->is_If()) {
4963 IfNode* iff = ctl->in(0)->as_If();
4964 Node* not_ctl = iff->proj_out(1 - ctl->as_Proj()->_con);
4965 assert(not_ctl != NULL && not_ctl != ctl, "found alternate");
4966 if (slow_region != NULL && slow_region->find_edge(not_ctl) >= 1) {
4967 ctl = iff->in(0); // This test feeds the known slow_region.
4968 continue;
4969 }
4970 // One more try: Various low-level checks bottom out in
4971 // uncommon traps. If the debug-info of the trap omits
4972 // any reference to the allocation, as we've already
4973 // observed, then there can be no objection to the trap.
4974 bool found_trap = false;
4975 for (DUIterator_Fast jmax, j = not_ctl->fast_outs(jmax); j < jmax; j++) {
4976 Node* obs = not_ctl->fast_out(j);
4977 if (obs->in(0) == not_ctl && obs->is_Call() &&
4978 (obs->as_Call()->entry_point() ==
4979 SharedRuntime::uncommon_trap_blob()->instructions_begin())) {
4980 found_trap = true; break;
4981 }
4982 }
4983 if (found_trap) {
4984 ctl = iff->in(0); // This test feeds a harmless uncommon trap.
4985 continue;
4986 }
4987 }
4988 return NULL;
4989 }
4990
4991 // If we get this far, we have an allocation which immediately
4992 // precedes the arraycopy, and we can take over zeroing the new object.
4993 // The arraycopy will finish the initialization, and provide
4994 // a new control state to which we will anchor the destination pointer.
4995
4996 return alloc;
4997 }
4998
4999 // Helper for initialization of arrays, creating a ClearArray.
5000 // It writes zero bits in [start..end), within the body of an array object.
5001 // The memory effects are all chained onto the 'adr_type' alias category.
5002 //
5003 // Since the object is otherwise uninitialized, we are free
5004 // to put a little "slop" around the edges of the cleared area,
5005 // as long as it does not go back into the array's header,
5006 // or beyond the array end within the heap.
5007 //
5008 // The lower edge can be rounded down to the nearest jint and the
5009 // upper edge can be rounded up to the nearest MinObjAlignmentInBytes.
5010 //
5011 // Arguments:
5012 // adr_type memory slice where writes are generated
5013 // dest oop of the destination array
5014 // basic_elem_type element type of the destination
5015 // slice_idx array index of first element to store
5016 // slice_len number of elements to store (or NULL)
5017 // dest_size total size in bytes of the array object
5018 //
5019 // Exactly one of slice_len or dest_size must be non-NULL.
5020 // If dest_size is non-NULL, zeroing extends to the end of the object.
5021 // If slice_len is non-NULL, the slice_idx value must be a constant.
5022 void
5023 LibraryCallKit::generate_clear_array(const TypePtr* adr_type,
5024 Node* dest,
5025 BasicType basic_elem_type,
5026 Node* slice_idx,
5027 Node* slice_len,
5028 Node* dest_size) {
5029 // one or the other but not both of slice_len and dest_size:
5030 assert((slice_len != NULL? 1: 0) + (dest_size != NULL? 1: 0) == 1, "");
5031 if (slice_len == NULL) slice_len = top();
5032 if (dest_size == NULL) dest_size = top();
5033
5034 // operate on this memory slice:
5035 Node* mem = memory(adr_type); // memory slice to operate on
5036
5037 // scaling and rounding of indexes:
5038 int scale = exact_log2(type2aelembytes(basic_elem_type));
5039 int abase = arrayOopDesc::base_offset_in_bytes(basic_elem_type);
5040 int clear_low = (-1 << scale) & (BytesPerInt - 1);
5041 int bump_bit = (-1 << scale) & BytesPerInt;
5042
5043 // determine constant starts and ends
5044 const intptr_t BIG_NEG = -128;
5045 assert(BIG_NEG + 2*abase < 0, "neg enough");
5046 intptr_t slice_idx_con = (intptr_t) find_int_con(slice_idx, BIG_NEG);
5047 intptr_t slice_len_con = (intptr_t) find_int_con(slice_len, BIG_NEG);
5048 if (slice_len_con == 0) {
5049 return; // nothing to do here
5050 }
5051 intptr_t start_con = (abase + (slice_idx_con << scale)) & ~clear_low;
5052 intptr_t end_con = find_intptr_t_con(dest_size, -1);
5053 if (slice_idx_con >= 0 && slice_len_con >= 0) {
5054 assert(end_con < 0, "not two cons");
5055 end_con = round_to(abase + ((slice_idx_con + slice_len_con) << scale),
5056 BytesPerLong);
5057 }
5058
5059 if (start_con >= 0 && end_con >= 0) {
5060 // Constant start and end. Simple.
5061 mem = ClearArrayNode::clear_memory(control(), mem, dest,
5062 start_con, end_con, &_gvn);
5063 } else if (start_con >= 0 && dest_size != top()) {
5064 // Constant start, pre-rounded end after the tail of the array.
5065 Node* end = dest_size;
5066 mem = ClearArrayNode::clear_memory(control(), mem, dest,
5067 start_con, end, &_gvn);
5068 } else if (start_con >= 0 && slice_len != top()) {
5069 // Constant start, non-constant end. End needs rounding up.
5070 // End offset = round_up(abase + ((slice_idx_con + slice_len) << scale), 8)
5071 intptr_t end_base = abase + (slice_idx_con << scale);
5072 int end_round = (-1 << scale) & (BytesPerLong - 1);
5073 Node* end = ConvI2X(slice_len);
5074 if (scale != 0)
5075 end = _gvn.transform( new(C,3) LShiftXNode(end, intcon(scale) ));
5076 end_base += end_round;
5077 end = _gvn.transform( new(C,3) AddXNode(end, MakeConX(end_base)) );
5078 end = _gvn.transform( new(C,3) AndXNode(end, MakeConX(~end_round)) );
5079 mem = ClearArrayNode::clear_memory(control(), mem, dest,
5080 start_con, end, &_gvn);
5081 } else if (start_con < 0 && dest_size != top()) {
5082 // Non-constant start, pre-rounded end after the tail of the array.
5083 // This is almost certainly a "round-to-end" operation.
5084 Node* start = slice_idx;
5085 start = ConvI2X(start);
5086 if (scale != 0)
5087 start = _gvn.transform( new(C,3) LShiftXNode( start, intcon(scale) ));
5088 start = _gvn.transform( new(C,3) AddXNode(start, MakeConX(abase)) );
5089 if ((bump_bit | clear_low) != 0) {
5090 int to_clear = (bump_bit | clear_low);
5091 // Align up mod 8, then store a jint zero unconditionally
5092 // just before the mod-8 boundary.
5093 if (((abase + bump_bit) & ~to_clear) - bump_bit
5094 < arrayOopDesc::length_offset_in_bytes() + BytesPerInt) {
5095 bump_bit = 0;
5096 assert((abase & to_clear) == 0, "array base must be long-aligned");
5097 } else {
5098 // Bump 'start' up to (or past) the next jint boundary:
5099 start = _gvn.transform( new(C,3) AddXNode(start, MakeConX(bump_bit)) );
5100 assert((abase & clear_low) == 0, "array base must be int-aligned");
5101 }
5102 // Round bumped 'start' down to jlong boundary in body of array.
5103 start = _gvn.transform( new(C,3) AndXNode(start, MakeConX(~to_clear)) );
5104 if (bump_bit != 0) {
5105 // Store a zero to the immediately preceding jint:
5106 Node* x1 = _gvn.transform( new(C,3) AddXNode(start, MakeConX(-bump_bit)) );
5107 Node* p1 = basic_plus_adr(dest, x1);
5108 mem = StoreNode::make(_gvn, control(), mem, p1, adr_type, intcon(0), T_INT);
5109 mem = _gvn.transform(mem);
5110 }
5111 }
5112 Node* end = dest_size; // pre-rounded
5113 mem = ClearArrayNode::clear_memory(control(), mem, dest,
5114 start, end, &_gvn);
5115 } else {
5116 // Non-constant start, unrounded non-constant end.
5117 // (Nobody zeroes a random midsection of an array using this routine.)
5118 ShouldNotReachHere(); // fix caller
5119 }
5120
5121 // Done.
5122 set_memory(mem, adr_type);
5123 }
5124
5125
5126 bool
5127 LibraryCallKit::generate_block_arraycopy(const TypePtr* adr_type,
5128 BasicType basic_elem_type,
5129 AllocateNode* alloc,
5130 Node* src, Node* src_offset,
5131 Node* dest, Node* dest_offset,
5132 Node* dest_size) {
5133 // See if there is an advantage from block transfer.
5134 int scale = exact_log2(type2aelembytes(basic_elem_type));
5135 if (scale >= LogBytesPerLong)
5136 return false; // it is already a block transfer
5137
5138 // Look at the alignment of the starting offsets.
5139 int abase = arrayOopDesc::base_offset_in_bytes(basic_elem_type);
5140 const intptr_t BIG_NEG = -128;
5141 assert(BIG_NEG + 2*abase < 0, "neg enough");
5142
5143 intptr_t src_off = abase + ((intptr_t) find_int_con(src_offset, -1) << scale);
5144 intptr_t dest_off = abase + ((intptr_t) find_int_con(dest_offset, -1) << scale);
5145 if (src_off < 0 || dest_off < 0)
5146 // At present, we can only understand constants.
5147 return false;
5148
5149 if (((src_off | dest_off) & (BytesPerLong-1)) != 0) {
5150 // Non-aligned; too bad.
5151 // One more chance: Pick off an initial 32-bit word.
5152 // This is a common case, since abase can be odd mod 8.
5153 if (((src_off | dest_off) & (BytesPerLong-1)) == BytesPerInt &&
5154 ((src_off ^ dest_off) & (BytesPerLong-1)) == 0) {
5155 Node* sptr = basic_plus_adr(src, src_off);
5156 Node* dptr = basic_plus_adr(dest, dest_off);
5157 Node* sval = make_load(control(), sptr, TypeInt::INT, T_INT, adr_type);
5158 store_to_memory(control(), dptr, sval, T_INT, adr_type);
5159 src_off += BytesPerInt;
5160 dest_off += BytesPerInt;
5161 } else {
5162 return false;
5163 }
5164 }
5165 assert(src_off % BytesPerLong == 0, "");
5166 assert(dest_off % BytesPerLong == 0, "");
5167
5168 // Do this copy by giant steps.
5169 Node* sptr = basic_plus_adr(src, src_off);
5170 Node* dptr = basic_plus_adr(dest, dest_off);
5171 Node* countx = dest_size;
5172 countx = _gvn.transform( new (C, 3) SubXNode(countx, MakeConX(dest_off)) );
5173 countx = _gvn.transform( new (C, 3) URShiftXNode(countx, intcon(LogBytesPerLong)) );
5174
5175 bool disjoint_bases = true; // since alloc != NULL
5176 generate_unchecked_arraycopy(adr_type, T_LONG, disjoint_bases,
5177 sptr, NULL, dptr, NULL, countx);
5178
5179 return true;
5180 }
5181
5182
5183 // Helper function; generates code for the slow case.
5184 // We make a call to a runtime method which emulates the native method,
5185 // but without the native wrapper overhead.
5186 void
5187 LibraryCallKit::generate_slow_arraycopy(const TypePtr* adr_type,
5188 Node* src, Node* src_offset,
5189 Node* dest, Node* dest_offset,
5190 Node* copy_length) {
5191 Node* call = make_runtime_call(RC_NO_LEAF | RC_UNCOMMON,
5192 OptoRuntime::slow_arraycopy_Type(),
5193 OptoRuntime::slow_arraycopy_Java(),
5194 "slow_arraycopy", adr_type,
5195 src, src_offset, dest, dest_offset,
5196 copy_length);
5197
5198 // Handle exceptions thrown by this fellow:
5199 make_slow_call_ex(call, env()->Throwable_klass(), false);
5200 }
5201
5202 // Helper function; generates code for cases requiring runtime checks.
5203 Node*
5204 LibraryCallKit::generate_checkcast_arraycopy(const TypePtr* adr_type,
5205 Node* dest_elem_klass,
5206 Node* src, Node* src_offset,
5207 Node* dest, Node* dest_offset,
5208 Node* copy_length) {
5209 if (stopped()) return NULL;
5210
5211 address copyfunc_addr = StubRoutines::checkcast_arraycopy();
5212 if (copyfunc_addr == NULL) { // Stub was not generated, go slow path.
5213 return NULL;
5214 }
5215
5216 // Pick out the parameters required to perform a store-check
5217 // for the target array. This is an optimistic check. It will
5218 // look in each non-null element's class, at the desired klass's
5219 // super_check_offset, for the desired klass.
5220 int sco_offset = Klass::super_check_offset_offset_in_bytes() + sizeof(oopDesc);
5221 Node* p3 = basic_plus_adr(dest_elem_klass, sco_offset);
5222 Node* n3 = new(C, 3) LoadINode(NULL, immutable_memory(), p3, TypeRawPtr::BOTTOM);
5223 Node* check_offset = _gvn.transform(n3);
5224 Node* check_value = dest_elem_klass;
5225
5226 Node* src_start = array_element_address(src, src_offset, T_OBJECT);
5227 Node* dest_start = array_element_address(dest, dest_offset, T_OBJECT);
5228
5229 // (We know the arrays are never conjoint, because their types differ.)
5230 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP,
5231 OptoRuntime::checkcast_arraycopy_Type(),
5232 copyfunc_addr, "checkcast_arraycopy", adr_type,
5233 // five arguments, of which two are
5234 // intptr_t (jlong in LP64)
5235 src_start, dest_start,
5236 copy_length XTOP,
5237 check_offset XTOP,
5238 check_value);
5239
5240 return _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Parms));
5241 }
5242
5243
5244 // Helper function; generates code for cases requiring runtime checks.
5245 Node*
5246 LibraryCallKit::generate_generic_arraycopy(const TypePtr* adr_type,
5247 Node* src, Node* src_offset,
5248 Node* dest, Node* dest_offset,
5249 Node* copy_length) {
5250 if (stopped()) return NULL;
5251
5252 address copyfunc_addr = StubRoutines::generic_arraycopy();
5253 if (copyfunc_addr == NULL) { // Stub was not generated, go slow path.
5254 return NULL;
5255 }
5256
5257 Node* call = make_runtime_call(RC_LEAF|RC_NO_FP,
5258 OptoRuntime::generic_arraycopy_Type(),
5259 copyfunc_addr, "generic_arraycopy", adr_type,
5260 src, src_offset, dest, dest_offset, copy_length);
5261
5262 return _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Parms));
5263 }
5264
5265 // Helper function; generates the fast out-of-line call to an arraycopy stub.
5266 void
5267 LibraryCallKit::generate_unchecked_arraycopy(const TypePtr* adr_type,
5268 BasicType basic_elem_type,
5269 bool disjoint_bases,
5270 Node* src, Node* src_offset,
5271 Node* dest, Node* dest_offset,
5272 Node* copy_length) {
5273 if (stopped()) return; // nothing to do
5274
5275 Node* src_start = src;
5276 Node* dest_start = dest;
5277 if (src_offset != NULL || dest_offset != NULL) {
5278 assert(src_offset != NULL && dest_offset != NULL, "");
5279 src_start = array_element_address(src, src_offset, basic_elem_type);
5280 dest_start = array_element_address(dest, dest_offset, basic_elem_type);
5281 }
5282
5283 // Figure out which arraycopy runtime method to call.
5284 const char* copyfunc_name = "arraycopy";
5285 address copyfunc_addr =
5286 basictype2arraycopy(basic_elem_type, src_offset, dest_offset,
5287 disjoint_bases, copyfunc_name);
5288
5289 // Call it. Note that the count_ix value is not scaled to a byte-size.
5290 make_runtime_call(RC_LEAF|RC_NO_FP,
5291 OptoRuntime::fast_arraycopy_Type(),
5292 copyfunc_addr, copyfunc_name, adr_type,
5293 src_start, dest_start, copy_length XTOP);
5294 }