1 /*
2 * Copyright (c) 2020, 2021, 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(NULL)
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 = NULL;
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 != NULL) {
111 BasicType bt = res->bottom_type()->basic_type();
112 if (C->inlining_incrementally() && res->is_InlineType()) {
113 // The caller expects an oop when incrementally inlining an intrinsic that returns an
114 // inline type. Make sure the call is re-executed if the allocation triggers a deoptimization.
115 PreserveReexecuteState preexecs(this);
116 jvms()->set_should_reexecute(true);
117 res = res->as_InlineType()->buffer(this);
118 }
119 push_node(bt, res);
120 }
121 }
122
123 private:
124 void fatal_unexpected_iid(vmIntrinsics::ID iid) {
125 fatal("unexpected intrinsic %d: %s", vmIntrinsics::as_int(iid), vmIntrinsics::name_at(iid));
126 }
127
128 void set_result(Node* n) { assert(_result == NULL, "only set once"); _result = n; }
129 void set_result(RegionNode* region, PhiNode* value);
130 Node* result() { return _result; }
131
132 virtual int reexecute_sp() { return _reexecute_sp; }
133
134 // Helper functions to inline natives
135 Node* generate_guard(Node* test, RegionNode* region, float true_prob);
136 Node* generate_slow_guard(Node* test, RegionNode* region);
137 Node* generate_fair_guard(Node* test, RegionNode* region);
138 Node* generate_negative_guard(Node* index, RegionNode* region,
139 // resulting CastII of index:
140 Node* *pos_index = NULL);
141 Node* generate_limit_guard(Node* offset, Node* subseq_length,
142 Node* array_length,
143 RegionNode* region);
144 void generate_string_range_check(Node* array, Node* offset,
145 Node* length, bool char_count);
146 Node* generate_current_thread(Node* &tls_output);
147 Node* load_klass_from_mirror_common(Node* mirror, bool never_see_null,
148 RegionNode* region, int null_path,
149 int offset);
150 Node* load_klass_from_mirror(Node* mirror, bool never_see_null,
151 RegionNode* region, int null_path) {
152 int offset = java_lang_Class::klass_offset();
153 return load_klass_from_mirror_common(mirror, never_see_null,
154 region, null_path,
155 offset);
156 }
157 Node* load_array_klass_from_mirror(Node* mirror, bool never_see_null,
158 RegionNode* region, int null_path) {
159 int offset = java_lang_Class::array_klass_offset();
160 return load_klass_from_mirror_common(mirror, never_see_null,
161 region, null_path,
162 offset);
163 }
164 Node* generate_access_flags_guard(Node* kls,
165 int modifier_mask, int modifier_bits,
166 RegionNode* region);
167 Node* generate_interface_guard(Node* kls, RegionNode* region);
168
169 enum ArrayKind {
170 AnyArray,
171 NonArray,
172 ObjectArray,
173 NonObjectArray,
174 TypeArray
175 };
176
177 Node* generate_hidden_class_guard(Node* kls, RegionNode* region);
178
179 Node* generate_array_guard(Node* kls, RegionNode* region) {
180 return generate_array_guard_common(kls, region, AnyArray);
181 }
182 Node* generate_non_array_guard(Node* kls, RegionNode* region) {
183 return generate_array_guard_common(kls, region, NonArray);
184 }
185 Node* generate_objArray_guard(Node* kls, RegionNode* region) {
186 return generate_array_guard_common(kls, region, ObjectArray);
187 }
188 Node* generate_non_objArray_guard(Node* kls, RegionNode* region) {
189 return generate_array_guard_common(kls, region, NonObjectArray);
190 }
191 Node* generate_typeArray_guard(Node* kls, RegionNode* region) {
192 return generate_array_guard_common(kls, region, TypeArray);
193 }
194 Node* generate_array_guard_common(Node* kls, RegionNode* region, ArrayKind kind);
195 Node* generate_virtual_guard(Node* obj_klass, RegionNode* slow_region);
196 CallJavaNode* generate_method_call(vmIntrinsics::ID method_id,
197 bool is_virtual = false, bool is_static = false);
198 CallJavaNode* generate_method_call_static(vmIntrinsics::ID method_id) {
199 return generate_method_call(method_id, false, true);
200 }
201 CallJavaNode* generate_method_call_virtual(vmIntrinsics::ID method_id) {
202 return generate_method_call(method_id, true, false);
203 }
204 Node* load_field_from_object(Node* fromObj, const char* fieldName, const char* fieldTypeString, DecoratorSet decorators, bool is_static, ciInstanceKlass* fromKls);
205 Node* field_address_from_object(Node* fromObj, const char* fieldName, const char* fieldTypeString, bool is_exact, bool is_static, ciInstanceKlass* fromKls);
206
207 Node* make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2, StrIntrinsicNode::ArgEnc ae);
208 bool inline_string_compareTo(StrIntrinsicNode::ArgEnc ae);
209 bool inline_string_indexOf(StrIntrinsicNode::ArgEnc ae);
210 bool inline_string_indexOfI(StrIntrinsicNode::ArgEnc ae);
211 Node* make_indexOf_node(Node* src_start, Node* src_count, Node* tgt_start, Node* tgt_count,
212 RegionNode* region, Node* phi, StrIntrinsicNode::ArgEnc ae);
213 bool inline_string_indexOfChar(StrIntrinsicNode::ArgEnc ae);
214 bool inline_string_equals(StrIntrinsicNode::ArgEnc ae);
215 bool inline_string_toBytesU();
216 bool inline_string_getCharsU();
217 bool inline_string_copy(bool compress);
218 bool inline_string_char_access(bool is_store);
219 Node* round_double_node(Node* n);
220 bool runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName);
221 bool inline_math_native(vmIntrinsics::ID id);
222 bool inline_math(vmIntrinsics::ID id);
223 bool inline_double_math(vmIntrinsics::ID id);
224 bool inline_math_pow();
225 template <typename OverflowOp>
226 bool inline_math_overflow(Node* arg1, Node* arg2);
227 void inline_math_mathExact(Node* math, Node* test);
228 bool inline_math_addExactI(bool is_increment);
229 bool inline_math_addExactL(bool is_increment);
230 bool inline_math_multiplyExactI();
231 bool inline_math_multiplyExactL();
232 bool inline_math_multiplyHigh();
233 bool inline_math_unsignedMultiplyHigh();
234 bool inline_math_negateExactI();
235 bool inline_math_negateExactL();
236 bool inline_math_subtractExactI(bool is_decrement);
237 bool inline_math_subtractExactL(bool is_decrement);
238 bool inline_min_max(vmIntrinsics::ID id);
239 bool inline_notify(vmIntrinsics::ID id);
240 Node* generate_min_max(vmIntrinsics::ID id, Node* x, Node* y);
241 // This returns Type::AnyPtr, RawPtr, or OopPtr.
242 int classify_unsafe_addr(Node* &base, Node* &offset, BasicType type);
243 Node* make_unsafe_address(Node*& base, Node* offset, BasicType type = T_ILLEGAL, bool can_cast = false);
244
245 typedef enum { Relaxed, Opaque, Volatile, Acquire, Release } AccessKind;
246 DecoratorSet mo_decorator_for_access_kind(AccessKind kind);
247 bool inline_unsafe_access(bool is_store, BasicType type, AccessKind kind, bool is_unaligned);
248 static bool klass_needs_init_guard(Node* kls);
249 bool inline_unsafe_allocate();
250 bool inline_unsafe_newArray(bool uninitialized);
251 bool inline_unsafe_writeback0();
252 bool inline_unsafe_writebackSync0(bool is_pre);
253 bool inline_unsafe_copyMemory();
254 bool inline_unsafe_make_private_buffer();
255 bool inline_unsafe_finish_private_buffer();
256 bool inline_native_currentThread();
257
258 bool inline_native_time_funcs(address method, const char* funcName);
259 #ifdef JFR_HAVE_INTRINSICS
260 bool inline_native_classID();
261 bool inline_native_getEventWriter();
262 #endif
263 bool inline_native_Class_query(vmIntrinsics::ID id);
264 bool inline_primitive_Class_conversion(vmIntrinsics::ID id);
265 bool inline_native_subtype_check();
266 bool inline_native_getLength();
267 bool inline_array_copyOf(bool is_copyOfRange);
268 bool inline_array_equals(StrIntrinsicNode::ArgEnc ae);
269 bool inline_preconditions_checkIndex(BasicType bt);
270 void copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array);
271 bool inline_native_clone(bool is_virtual);
272 bool inline_native_Reflection_getCallerClass();
273 // Helper function for inlining native object hash method
274 bool inline_native_hashcode(bool is_virtual, bool is_static);
275 bool inline_native_getClass();
276
277 // Helper functions for inlining arraycopy
278 bool inline_arraycopy();
279 AllocateArrayNode* tightly_coupled_allocation(Node* ptr);
280 JVMState* arraycopy_restore_alloc_state(AllocateArrayNode* alloc, int& saved_reexecute_sp);
281 void arraycopy_move_allocation_here(AllocateArrayNode* alloc, Node* dest, JVMState* saved_jvms, int saved_reexecute_sp,
282 uint new_idx);
283
284 typedef enum { LS_get_add, LS_get_set, LS_cmp_swap, LS_cmp_swap_weak, LS_cmp_exchange } LoadStoreKind;
285 bool inline_unsafe_load_store(BasicType type, LoadStoreKind kind, AccessKind access_kind);
286 bool inline_unsafe_fence(vmIntrinsics::ID id);
287 bool inline_onspinwait();
288 bool inline_fp_conversions(vmIntrinsics::ID id);
289 bool inline_number_methods(vmIntrinsics::ID id);
290 bool inline_reference_get();
291 bool inline_reference_refersTo0(bool is_phantom);
292 bool inline_Class_cast();
293 bool inline_aescrypt_Block(vmIntrinsics::ID id);
294 bool inline_cipherBlockChaining_AESCrypt(vmIntrinsics::ID id);
295 bool inline_electronicCodeBook_AESCrypt(vmIntrinsics::ID id);
296 bool inline_counterMode_AESCrypt(vmIntrinsics::ID id);
297 Node* inline_cipherBlockChaining_AESCrypt_predicate(bool decrypting);
298 Node* inline_electronicCodeBook_AESCrypt_predicate(bool decrypting);
299 Node* inline_counterMode_AESCrypt_predicate();
300 Node* get_key_start_from_aescrypt_object(Node* aescrypt_object);
301 bool inline_ghash_processBlocks();
302 bool inline_base64_encodeBlock();
303 bool inline_base64_decodeBlock();
304 bool inline_digestBase_implCompress(vmIntrinsics::ID id);
305 bool inline_digestBase_implCompressMB(int predicate);
306 bool inline_digestBase_implCompressMB(Node* digestBaseObj, ciInstanceKlass* instklass,
307 const char* state_type, address stubAddr, const char *stubName,
308 Node* src_start, Node* ofs, Node* limit);
309 Node* get_state_from_digest_object(Node *digestBase_object, const char* state_type);
310 Node* get_digest_length_from_digest_object(Node *digestBase_object);
311 Node* inline_digestBase_implCompressMB_predicate(int predicate);
312 bool inline_encodeISOArray(bool ascii);
313 bool inline_updateCRC32();
314 bool inline_updateBytesCRC32();
315 bool inline_updateByteBufferCRC32();
316 Node* get_table_from_crc32c_class(ciInstanceKlass *crc32c_class);
317 bool inline_updateBytesCRC32C();
318 bool inline_updateDirectByteBufferCRC32C();
319 bool inline_updateBytesAdler32();
320 bool inline_updateByteBufferAdler32();
321 bool inline_multiplyToLen();
322 bool inline_countPositives();
323 bool inline_squareToLen();
324 bool inline_mulAdd();
325 bool inline_montgomeryMultiply();
326 bool inline_montgomerySquare();
327 bool inline_bigIntegerShift(bool isRightShift);
328 bool inline_vectorizedMismatch();
329 bool inline_fma(vmIntrinsics::ID id);
330 bool inline_character_compare(vmIntrinsics::ID id);
331 bool inline_fp_min_max(vmIntrinsics::ID id);
332 bool inline_galoisCounterMode_AESCrypt();
333 Node* inline_galoisCounterMode_AESCrypt_predicate();
334
335 bool inline_profileBoolean();
336 bool inline_isCompileConstant();
337
338 // Vector API support
339 bool inline_vector_nary_operation(int n);
340 bool inline_vector_frombits_coerced();
341 bool inline_vector_shuffle_to_vector();
342 bool inline_vector_shuffle_iota();
343 bool inline_vector_mask_operation();
344 bool inline_vector_mem_operation(bool is_store);
345 bool inline_vector_mem_masked_operation(bool is_store);
346 bool inline_vector_gather_scatter(bool is_scatter);
347 bool inline_vector_reduction();
348 bool inline_vector_test();
349 bool inline_vector_blend();
350 bool inline_vector_rearrange();
351 bool inline_vector_compare();
352 bool inline_vector_broadcast_int();
353 bool inline_vector_convert();
354 bool inline_vector_extract();
355 bool inline_vector_insert();
356 Node* gen_call_to_svml(int vector_api_op_id, BasicType bt, int num_elem, Node* opd1, Node* opd2);
357
358 enum VectorMaskUseType {
359 VecMaskUseLoad = 1 << 0,
360 VecMaskUseStore = 1 << 1,
361 VecMaskUseAll = VecMaskUseLoad | VecMaskUseStore,
362 VecMaskUsePred = 1 << 2,
363 VecMaskNotUsed = 1 << 3
364 };
365
366 bool arch_supports_vector(int op, int num_elem, BasicType type, VectorMaskUseType mask_use_type, bool has_scalar_args = false);
367 bool arch_supports_vector_rotate(int opc, int num_elem, BasicType elem_bt, VectorMaskUseType mask_use_type, bool has_scalar_args = false);
368
369 void clear_upper_avx() {
370 #ifdef X86
371 if (UseAVX >= 2) {
372 C->set_clear_upper_avx(true);
373 }
374 #endif
375 }
376
377 bool inline_getObjectSize();
378
379 bool inline_blackhole();
380 };
381