1 /*
2 * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "ci/ciMethod.hpp"
26 #include "classfile/javaClasses.hpp"
27 #include "opto/callGenerator.hpp"
28 #include "opto/graphKit.hpp"
29 #include "opto/castnode.hpp"
30 #include "opto/convertnode.hpp"
31 #include "opto/inlinetypenode.hpp"
32 #include "opto/intrinsicnode.hpp"
33 #include "opto/movenode.hpp"
34
35 class LibraryIntrinsic : public InlineCallGenerator {
36 // Extend the set of intrinsics known to the runtime:
37 public:
38 private:
39 bool _is_virtual;
40 bool _does_virtual_dispatch;
41 int8_t _predicates_count; // Intrinsic is predicated by several conditions
42 int8_t _last_predicate; // Last generated predicate
43 vmIntrinsics::ID _intrinsic_id;
44
45 public:
46 LibraryIntrinsic(ciMethod* m, bool is_virtual, int predicates_count, bool does_virtual_dispatch, vmIntrinsics::ID id)
47 : InlineCallGenerator(m),
48 _is_virtual(is_virtual),
49 _does_virtual_dispatch(does_virtual_dispatch),
50 _predicates_count((int8_t)predicates_count),
51 _last_predicate((int8_t)-1),
52 _intrinsic_id(id)
53 {
54 }
55 virtual bool is_intrinsic() const { return true; }
56 virtual bool is_virtual() const { return _is_virtual; }
57 virtual bool is_predicated() const { return _predicates_count > 0; }
58 virtual int predicates_count() const { return _predicates_count; }
59 virtual bool does_virtual_dispatch() const { return _does_virtual_dispatch; }
60 virtual JVMState* generate(JVMState* jvms);
61 virtual Node* generate_predicate(JVMState* jvms, int predicate);
62 vmIntrinsics::ID intrinsic_id() const { return _intrinsic_id; }
63 };
64
65
66 // Local helper class for LibraryIntrinsic:
67 class LibraryCallKit : public GraphKit {
68 private:
69 LibraryIntrinsic* _intrinsic; // the library intrinsic being called
70 Node* _result; // the result node, if any
71 int _reexecute_sp; // the stack pointer when bytecode needs to be reexecuted
72
73 const TypeOopPtr* sharpen_unsafe_type(Compile::AliasType* alias_type, const TypePtr *adr_type);
74
75 public:
76 LibraryCallKit(JVMState* jvms, LibraryIntrinsic* intrinsic)
77 : GraphKit(jvms),
78 _intrinsic(intrinsic),
79 _result(nullptr)
80 {
81 // Check if this is a root compile. In that case we don't have a caller.
82 if (!jvms->has_method()) {
83 _reexecute_sp = sp();
84 } else {
85 // Find out how many arguments the interpreter needs when deoptimizing
86 // and save the stack pointer value so it can used by uncommon_trap.
87 // We find the argument count by looking at the declared signature.
88 bool ignored_will_link;
89 ciSignature* declared_signature = nullptr;
90 ciMethod* ignored_callee = caller()->get_method_at_bci(bci(), ignored_will_link, &declared_signature);
91 const int nargs = declared_signature->arg_size_for_bc(caller()->java_code_at_bci(bci()));
92 _reexecute_sp = sp() + nargs; // "push" arguments back on stack
93 }
94 }
95
96 virtual LibraryCallKit* is_LibraryCallKit() const { return (LibraryCallKit*)this; }
97
98 ciMethod* caller() const { return jvms()->method(); }
99 int bci() const { return jvms()->bci(); }
100 LibraryIntrinsic* intrinsic() const { return _intrinsic; }
101 vmIntrinsics::ID intrinsic_id() const { return _intrinsic->intrinsic_id(); }
102 ciMethod* callee() const { return _intrinsic->method(); }
103
104 bool try_to_inline(int predicate);
105 Node* try_to_predicate(int predicate);
106
107 void push_result() {
108 // Push the result onto the stack.
109 Node* res = result();
110 if (!stopped() && res != nullptr) {
111 if (res->is_top()) {
112 assert(false, "Can't determine return value.");
113 C->record_method_not_compilable("Can't determine return value.");
114 }
115 BasicType bt = res->bottom_type()->basic_type();
116 if (C->inlining_incrementally() && res->is_InlineType()) {
117 // The caller expects an oop when incrementally inlining an intrinsic that returns an
118 // inline type. Make sure the call is re-executed if the allocation triggers a deoptimization.
119 PreserveReexecuteState preexecs(this);
120 jvms()->set_should_reexecute(true);
121 res = res->as_InlineType()->buffer(this);
122 }
123 push_node(bt, res);
124 }
125 }
126
127 private:
128 void fatal_unexpected_iid(vmIntrinsics::ID iid) {
129 fatal("unexpected intrinsic %d: %s", vmIntrinsics::as_int(iid), vmIntrinsics::name_at(iid));
130 }
131
132 void set_result(Node* n) { assert(_result == nullptr, "only set once"); _result = n; }
133 void set_result(RegionNode* region, PhiNode* value);
134 Node* result() { return _result; }
135
136 virtual int reexecute_sp() { return _reexecute_sp; }
137
138 // Helper functions to inline natives
139 Node* generate_guard(Node* test, RegionNode* region, float true_prob);
140 Node* generate_slow_guard(Node* test, RegionNode* region);
141 Node* generate_fair_guard(Node* test, RegionNode* region);
142 Node* generate_negative_guard(Node* index, RegionNode* region,
143 // resulting CastII of index:
144 Node* *pos_index = nullptr);
145 Node* generate_limit_guard(Node* offset, Node* subseq_length,
146 Node* array_length,
147 RegionNode* region);
148 void generate_string_range_check(Node* array, Node* offset,
149 Node* length, bool char_count);
150 Node* current_thread_helper(Node* &tls_output, ByteSize handle_offset,
151 bool is_immutable);
152 Node* generate_current_thread(Node* &tls_output);
153 Node* generate_virtual_thread(Node* threadObj);
154 Node* load_klass_from_mirror_common(Node* mirror, bool never_see_null,
155 RegionNode* region, int null_path,
156 int offset);
157 Node* load_klass_from_mirror(Node* mirror, bool never_see_null,
158 RegionNode* region, int null_path) {
159 int offset = java_lang_Class::klass_offset();
160 return load_klass_from_mirror_common(mirror, never_see_null,
161 region, null_path,
162 offset);
163 }
164 Node* load_array_klass_from_mirror(Node* mirror, bool never_see_null,
165 RegionNode* region, int null_path) {
166 int offset = java_lang_Class::array_klass_offset();
167 return load_klass_from_mirror_common(mirror, never_see_null,
168 region, null_path,
169 offset);
170 }
171 Node* generate_klass_flags_guard(Node* kls, int modifier_mask, int modifier_bits, RegionNode* region,
172 ByteSize offset, const Type* type, BasicType bt);
173 Node* generate_misc_flags_guard(Node* kls,
174 int modifier_mask, int modifier_bits,
175 RegionNode* region);
176 Node* generate_interface_guard(Node* kls, RegionNode* region);
177
178 enum ArrayKind {
179 AnyArray,
180 NonArray,
181 ObjectArray,
182 NonObjectArray,
183 TypeArray
184 };
185
186 Node* generate_hidden_class_guard(Node* kls, RegionNode* region);
187
188 Node* generate_array_guard(Node* kls, RegionNode* region, Node** obj = nullptr) {
189 return generate_array_guard_common(kls, region, AnyArray, obj);
190 }
191 Node* generate_non_array_guard(Node* kls, RegionNode* region, Node** obj = nullptr) {
192 return generate_array_guard_common(kls, region, NonArray, obj);
193 }
194 Node* generate_objArray_guard(Node* kls, RegionNode* region, Node** obj = nullptr) {
195 return generate_array_guard_common(kls, region, ObjectArray, obj);
196 }
197 Node* generate_non_objArray_guard(Node* kls, RegionNode* region, Node** obj = nullptr) {
198 return generate_array_guard_common(kls, region, NonObjectArray, obj);
199 }
200 Node* generate_typeArray_guard(Node* kls, RegionNode* region, Node** obj = nullptr) {
201 return generate_array_guard_common(kls, region, TypeArray, obj);
202 }
203 Node* generate_array_guard_common(Node* kls, RegionNode* region, ArrayKind kind, Node** obj = nullptr);
204 Node* generate_virtual_guard(Node* obj_klass, RegionNode* slow_region);
205 CallJavaNode* generate_method_call(vmIntrinsicID method_id, bool is_virtual, bool is_static, bool res_not_null);
206 CallJavaNode* generate_method_call_static(vmIntrinsicID method_id, bool res_not_null) {
207 return generate_method_call(method_id, false, true, res_not_null);
208 }
209 Node* load_field_from_object(Node* fromObj, const char* fieldName, const char* fieldTypeString, DecoratorSet decorators = IN_HEAP, bool is_static = false, ciInstanceKlass* fromKls = nullptr);
210 Node* field_address_from_object(Node* fromObj, const char* fieldName, const char* fieldTypeString, bool is_exact = true, bool is_static = false, ciInstanceKlass* fromKls = nullptr);
211
212 Node* make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2, StrIntrinsicNode::ArgEnc ae);
213 bool inline_string_compareTo(StrIntrinsicNode::ArgEnc ae);
214 bool inline_string_indexOf(StrIntrinsicNode::ArgEnc ae);
215 bool inline_string_indexOfI(StrIntrinsicNode::ArgEnc ae);
216 Node* make_indexOf_node(Node* src_start, Node* src_count, Node* tgt_start, Node* tgt_count,
217 RegionNode* region, Node* phi, StrIntrinsicNode::ArgEnc ae);
218 bool inline_string_indexOfChar(StrIntrinsicNode::ArgEnc ae);
219 bool inline_string_equals(StrIntrinsicNode::ArgEnc ae);
220 bool inline_vectorizedHashCode();
221 bool inline_string_toBytesU();
222 bool inline_string_getCharsU();
223 bool inline_string_copy(bool compress);
224 bool inline_string_char_access(bool is_store);
225 Node* round_double_node(Node* n);
226 bool runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName);
227 bool inline_math_native(vmIntrinsics::ID id);
228 bool inline_math(vmIntrinsics::ID id);
229 bool inline_double_math(vmIntrinsics::ID id);
230 bool inline_math_pow();
231 template <typename OverflowOp>
232 bool inline_math_overflow(Node* arg1, Node* arg2);
233 void inline_math_mathExact(Node* math, Node* test);
234 bool inline_math_addExactI(bool is_increment);
235 bool inline_math_addExactL(bool is_increment);
236 bool inline_math_multiplyExactI();
237 bool inline_math_multiplyExactL();
238 bool inline_math_multiplyHigh();
239 bool inline_math_unsignedMultiplyHigh();
240 bool inline_math_negateExactI();
241 bool inline_math_negateExactL();
242 bool inline_math_subtractExactI(bool is_decrement);
243 bool inline_math_subtractExactL(bool is_decrement);
244 bool inline_min_max(vmIntrinsics::ID id);
245 bool inline_notify(vmIntrinsics::ID id);
246 Node* generate_min_max(vmIntrinsics::ID id, Node* x, Node* y);
247 // This returns Type::AnyPtr, RawPtr, or OopPtr.
248 int classify_unsafe_addr(Node* &base, Node* &offset, BasicType type);
249 Node* make_unsafe_address(Node*& base, Node* offset, BasicType type = T_ILLEGAL, bool can_cast = false);
250
251 typedef enum { Relaxed, Opaque, Volatile, Acquire, Release } AccessKind;
252 DecoratorSet mo_decorator_for_access_kind(AccessKind kind);
253 bool inline_unsafe_access(bool is_store, BasicType type, AccessKind kind, bool is_unaligned, bool is_flat = false);
254 static bool klass_needs_init_guard(Node* kls);
255 bool inline_unsafe_allocate();
256 bool inline_unsafe_newArray(bool uninitialized);
257 bool inline_newArray(bool null_free, bool atomic);
258 bool inline_unsafe_writeback0();
259 bool inline_unsafe_writebackSync0(bool is_pre);
260 bool inline_unsafe_copyMemory();
261 bool inline_unsafe_isFlatArray();
262 bool inline_unsafe_make_private_buffer();
263 bool inline_unsafe_finish_private_buffer();
264 bool inline_unsafe_setMemory();
265
266 bool inline_native_currentCarrierThread();
267 bool inline_native_currentThread();
268 bool inline_native_setCurrentThread();
269
270 bool inline_native_scopedValueCache();
271 const Type* scopedValueCache_type();
272 Node* scopedValueCache_helper();
273 bool inline_native_setScopedValueCache();
274 bool inline_native_Continuation_pinning(bool unpin);
275
276 bool inline_native_time_funcs(address method, const char* funcName);
277 #if INCLUDE_JVMTI
278 bool inline_native_notify_jvmti_funcs(address funcAddr, const char* funcName, bool is_start, bool is_end);
279 bool inline_native_notify_jvmti_hide();
280 bool inline_native_notify_jvmti_sync();
281 #endif
282
283 #ifdef JFR_HAVE_INTRINSICS
284 bool inline_native_classID();
285 bool inline_native_getEventWriter();
286 bool inline_native_jvm_commit();
287 void extend_setCurrentThread(Node* jt, Node* thread);
288 #endif
289 bool inline_native_Class_query(vmIntrinsics::ID id);
290 bool inline_primitive_Class_conversion(vmIntrinsics::ID id);
291 bool inline_native_subtype_check();
292 bool inline_native_getLength();
293 bool inline_array_copyOf(bool is_copyOfRange);
294 bool inline_array_equals(StrIntrinsicNode::ArgEnc ae);
295 bool inline_preconditions_checkIndex(BasicType bt);
296 void copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array);
297 bool inline_native_clone(bool is_virtual);
298 bool inline_native_Reflection_getCallerClass();
299 // Helper function for inlining native object hash method
300 bool inline_native_hashcode(bool is_virtual, bool is_static);
301 bool inline_native_getClass();
302
303 // Helper functions for inlining arraycopy
304 bool inline_arraycopy();
305 AllocateArrayNode* tightly_coupled_allocation(Node* ptr);
306 static CallStaticJavaNode* get_uncommon_trap_from_success_proj(Node* node);
307 SafePointNode* create_safepoint_with_state_before_array_allocation(const AllocateArrayNode* alloc) const;
308 void replace_unrelated_uncommon_traps_with_alloc_state(AllocateArrayNode* alloc, JVMState* saved_jvms_before_guards);
309 void replace_unrelated_uncommon_traps_with_alloc_state(JVMState* saved_jvms_before_guards);
310 void create_new_uncommon_trap(CallStaticJavaNode* uncommon_trap_call);
311 JVMState* arraycopy_restore_alloc_state(AllocateArrayNode* alloc, int& saved_reexecute_sp);
312 void arraycopy_move_allocation_here(AllocateArrayNode* alloc, Node* dest, JVMState* saved_jvms_before_guards, int saved_reexecute_sp,
313 uint new_idx);
314 bool check_array_sort_arguments(Node* elementType, Node* obj, BasicType& bt);
315 bool inline_array_sort();
316 bool inline_array_partition();
317 typedef enum { LS_get_add, LS_get_set, LS_cmp_swap, LS_cmp_swap_weak, LS_cmp_exchange } LoadStoreKind;
318 bool inline_unsafe_load_store(BasicType type, LoadStoreKind kind, AccessKind access_kind);
319 bool inline_unsafe_fence(vmIntrinsics::ID id);
320 bool inline_onspinwait();
321 bool inline_fp_conversions(vmIntrinsics::ID id);
322 bool inline_fp_range_check(vmIntrinsics::ID id);
323 bool inline_fp16_operations(vmIntrinsics::ID id, int num_args);
324 Node* unbox_fp16_value(const TypeInstPtr* box_class, ciField* field, Node* box);
325 Node* box_fp16_value(const TypeInstPtr* box_class, ciField* field, Node* value);
326 bool inline_number_methods(vmIntrinsics::ID id);
327 bool inline_bitshuffle_methods(vmIntrinsics::ID id);
328 bool inline_compare_unsigned(vmIntrinsics::ID id);
329 bool inline_divmod_methods(vmIntrinsics::ID id);
330 bool inline_reference_get();
331 bool inline_reference_refersTo0(bool is_phantom);
332 bool inline_reference_clear0(bool is_phantom);
333 bool inline_Class_cast();
334 bool inline_aescrypt_Block(vmIntrinsics::ID id);
335 bool inline_cipherBlockChaining_AESCrypt(vmIntrinsics::ID id);
336 bool inline_electronicCodeBook_AESCrypt(vmIntrinsics::ID id);
337 bool inline_counterMode_AESCrypt(vmIntrinsics::ID id);
338 Node* inline_cipherBlockChaining_AESCrypt_predicate(bool decrypting);
339 Node* inline_electronicCodeBook_AESCrypt_predicate(bool decrypting);
340 Node* inline_counterMode_AESCrypt_predicate();
341 Node* get_key_start_from_aescrypt_object(Node* aescrypt_object);
342 bool inline_ghash_processBlocks();
343 bool inline_chacha20Block();
344 bool inline_dilithiumAlmostNtt();
345 bool inline_dilithiumAlmostInverseNtt();
346 bool inline_dilithiumNttMult();
347 bool inline_dilithiumMontMulByConstant();
348 bool inline_dilithiumDecomposePoly();
349 bool inline_base64_encodeBlock();
350 bool inline_base64_decodeBlock();
351 bool inline_poly1305_processBlocks();
352 bool inline_intpoly_montgomeryMult_P256();
353 bool inline_intpoly_assign();
354 bool inline_digestBase_implCompress(vmIntrinsics::ID id);
355 bool inline_double_keccak();
356 bool inline_digestBase_implCompressMB(int predicate);
357 bool inline_digestBase_implCompressMB(Node* digestBaseObj, ciInstanceKlass* instklass,
358 BasicType elem_type, address stubAddr, const char *stubName,
359 Node* src_start, Node* ofs, Node* limit);
360 Node* get_state_from_digest_object(Node *digestBase_object, BasicType elem_type);
361 Node* get_block_size_from_digest_object(Node *digestBase_object);
362 Node* inline_digestBase_implCompressMB_predicate(int predicate);
363 bool inline_encodeISOArray(bool ascii);
364 bool inline_updateCRC32();
365 bool inline_updateBytesCRC32();
366 bool inline_updateByteBufferCRC32();
367 Node* get_table_from_crc32c_class(ciInstanceKlass *crc32c_class);
368 bool inline_updateBytesCRC32C();
369 bool inline_updateDirectByteBufferCRC32C();
370 bool inline_updateBytesAdler32();
371 bool inline_updateByteBufferAdler32();
372 bool inline_multiplyToLen();
373 bool inline_countPositives();
374 bool inline_squareToLen();
375 bool inline_mulAdd();
376 bool inline_montgomeryMultiply();
377 bool inline_montgomerySquare();
378 bool inline_bigIntegerShift(bool isRightShift);
379 bool inline_vectorizedMismatch();
380 bool inline_fma(vmIntrinsics::ID id);
381 bool inline_character_compare(vmIntrinsics::ID id);
382 bool inline_fp_min_max(vmIntrinsics::ID id);
383 bool inline_galoisCounterMode_AESCrypt();
384 Node* inline_galoisCounterMode_AESCrypt_predicate();
385
386 bool inline_profileBoolean();
387 bool inline_isCompileConstant();
388
389 bool inline_continuation_do_yield();
390
391 // Vector API support
392 bool inline_vector_nary_operation(int n);
393 bool inline_vector_frombits_coerced();
394 bool inline_vector_mask_operation();
395 bool inline_vector_mem_operation(bool is_store);
396 bool inline_vector_mem_masked_operation(bool is_store);
397 bool inline_vector_gather_scatter(bool is_scatter);
398 bool inline_vector_reduction();
399 bool inline_vector_test();
400 bool inline_vector_blend();
401 bool inline_vector_rearrange();
402 bool inline_vector_select_from();
403 bool inline_vector_compare();
404 bool inline_vector_broadcast_int();
405 bool inline_vector_convert();
406 bool inline_vector_extract();
407 bool inline_vector_insert();
408 bool inline_vector_compress_expand();
409 bool inline_index_vector();
410 bool inline_index_partially_in_upper_range();
411 bool inline_vector_select_from_two_vectors();
412
413 Node* gen_call_to_vector_math(int vector_api_op_id, BasicType bt, int num_elem, Node* opd1, Node* opd2);
414
415 enum VectorMaskUseType {
416 VecMaskUseLoad = 1 << 0,
417 VecMaskUseStore = 1 << 1,
418 VecMaskUseAll = VecMaskUseLoad | VecMaskUseStore,
419 VecMaskUsePred = 1 << 2,
420 VecMaskNotUsed = 1 << 3
421 };
422
423 bool arch_supports_vector(int op, int num_elem, BasicType type, VectorMaskUseType mask_use_type, bool has_scalar_args = false);
424 bool arch_supports_vector_rotate(int opc, int num_elem, BasicType elem_bt, VectorMaskUseType mask_use_type, bool has_scalar_args = false);
425
426 void clear_upper_avx() {
427 #ifdef X86
428 if (UseAVX >= 2) {
429 C->set_clear_upper_avx(true);
430 }
431 #endif
432 }
433
434 bool inline_getObjectSize();
435
436 bool inline_blackhole();
437 };
438