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/intrinsicnode.hpp"
32 #include "opto/movenode.hpp"
33
34 class LibraryIntrinsic : public InlineCallGenerator {
35 // Extend the set of intrinsics known to the runtime:
36 public:
37 private:
38 bool _is_virtual;
39 bool _does_virtual_dispatch;
40 int8_t _predicates_count; // Intrinsic is predicated by several conditions
41 int8_t _last_predicate; // Last generated predicate
42 vmIntrinsics::ID _intrinsic_id;
43
44 public:
45 LibraryIntrinsic(ciMethod* m, bool is_virtual, int predicates_count, bool does_virtual_dispatch, vmIntrinsics::ID id)
46 : InlineCallGenerator(m),
47 _is_virtual(is_virtual),
48 _does_virtual_dispatch(does_virtual_dispatch),
49 _predicates_count((int8_t)predicates_count),
50 _last_predicate((int8_t)-1),
51 _intrinsic_id(id)
52 {
53 }
54 virtual bool is_intrinsic() const { return true; }
55 virtual bool is_virtual() const { return _is_virtual; }
56 virtual bool is_predicated() const { return _predicates_count > 0; }
57 virtual int predicates_count() const { return _predicates_count; }
58 virtual bool does_virtual_dispatch() const { return _does_virtual_dispatch; }
59 virtual JVMState* generate(JVMState* jvms);
60 virtual Node* generate_predicate(JVMState* jvms, int predicate);
61 vmIntrinsics::ID intrinsic_id() const { return _intrinsic_id; }
62 };
63
64
65 // Local helper class for LibraryIntrinsic:
66 class LibraryCallKit : public GraphKit {
67 private:
68 LibraryIntrinsic* _intrinsic; // the library intrinsic being called
69 Node* _result; // the result node, if any
70 int _reexecute_sp; // the stack pointer when bytecode needs to be reexecuted
71
72 const TypeOopPtr* sharpen_unsafe_type(Compile::AliasType* alias_type, const TypePtr *adr_type);
73
74 public:
75 LibraryCallKit(JVMState* jvms, LibraryIntrinsic* intrinsic)
76 : GraphKit(jvms),
77 _intrinsic(intrinsic),
78 _result(NULL)
79 {
80 // Check if this is a root compile. In that case we don't have a caller.
81 if (!jvms->has_method()) {
82 _reexecute_sp = sp();
83 } else {
84 // Find out how many arguments the interpreter needs when deoptimizing
85 // and save the stack pointer value so it can used by uncommon_trap.
86 // We find the argument count by looking at the declared signature.
87 bool ignored_will_link;
88 ciSignature* declared_signature = NULL;
89 ciMethod* ignored_callee = caller()->get_method_at_bci(bci(), ignored_will_link, &declared_signature);
90 const int nargs = declared_signature->arg_size_for_bc(caller()->java_code_at_bci(bci()));
91 _reexecute_sp = sp() + nargs; // "push" arguments back on stack
92 }
93 }
94
95 virtual LibraryCallKit* is_LibraryCallKit() const { return (LibraryCallKit*)this; }
96
97 ciMethod* caller() const { return jvms()->method(); }
98 int bci() const { return jvms()->bci(); }
99 LibraryIntrinsic* intrinsic() const { return _intrinsic; }
100 vmIntrinsics::ID intrinsic_id() const { return _intrinsic->intrinsic_id(); }
101 ciMethod* callee() const { return _intrinsic->method(); }
102
103 bool try_to_inline(int predicate);
104 Node* try_to_predicate(int predicate);
105
106 void push_result() {
107 // Push the result onto the stack.
108 if (!stopped() && result() != NULL) {
109 BasicType bt = result()->bottom_type()->basic_type();
110 push_node(bt, result());
111 }
112 }
113
114 private:
115 void fatal_unexpected_iid(vmIntrinsics::ID iid) {
116 fatal("unexpected intrinsic %d: %s", vmIntrinsics::as_int(iid), vmIntrinsics::name_at(iid));
117 }
118
119 void set_result(Node* n) { assert(_result == NULL, "only set once"); _result = n; }
120 void set_result(RegionNode* region, PhiNode* value);
121 Node* result() { return _result; }
122
123 virtual int reexecute_sp() { return _reexecute_sp; }
124
125 // Helper functions to inline natives
126 Node* generate_guard(Node* test, RegionNode* region, float true_prob);
127 Node* generate_slow_guard(Node* test, RegionNode* region);
128 Node* generate_fair_guard(Node* test, RegionNode* region);
129 Node* generate_negative_guard(Node* index, RegionNode* region,
130 // resulting CastII of index:
131 Node* *pos_index = NULL);
132 Node* generate_limit_guard(Node* offset, Node* subseq_length,
133 Node* array_length,
134 RegionNode* region);
135 void generate_string_range_check(Node* array, Node* offset,
136 Node* length, bool char_count);
137 Node* generate_current_thread(Node* &tls_output);
138 Node* load_mirror_from_klass(Node* klass);
139 Node* load_klass_from_mirror_common(Node* mirror, bool never_see_null,
140 RegionNode* region, int null_path,
141 int offset);
142 Node* load_klass_from_mirror(Node* mirror, bool never_see_null,
143 RegionNode* region, int null_path) {
144 int offset = java_lang_Class::klass_offset();
145 return load_klass_from_mirror_common(mirror, never_see_null,
146 region, null_path,
147 offset);
148 }
149 Node* load_array_klass_from_mirror(Node* mirror, bool never_see_null,
150 RegionNode* region, int null_path) {
151 int offset = java_lang_Class::array_klass_offset();
152 return load_klass_from_mirror_common(mirror, never_see_null,
153 region, null_path,
154 offset);
155 }
156 Node* generate_access_flags_guard(Node* kls,
157 int modifier_mask, int modifier_bits,
158 RegionNode* region);
159 Node* generate_interface_guard(Node* kls, RegionNode* region);
160 Node* generate_hidden_class_guard(Node* kls, RegionNode* region);
161 Node* generate_array_guard(Node* kls, RegionNode* region) {
162 return generate_array_guard_common(kls, region, false, false);
163 }
164 Node* generate_non_array_guard(Node* kls, RegionNode* region) {
165 return generate_array_guard_common(kls, region, false, true);
166 }
167 Node* generate_objArray_guard(Node* kls, RegionNode* region) {
168 return generate_array_guard_common(kls, region, true, false);
169 }
170 Node* generate_non_objArray_guard(Node* kls, RegionNode* region) {
171 return generate_array_guard_common(kls, region, true, true);
172 }
173 Node* generate_array_guard_common(Node* kls, RegionNode* region,
174 bool obj_array, bool not_array);
175 Node* generate_virtual_guard(Node* obj_klass, RegionNode* slow_region);
176 CallJavaNode* generate_method_call(vmIntrinsics::ID method_id,
177 bool is_virtual = false, bool is_static = false);
178 CallJavaNode* generate_method_call_static(vmIntrinsics::ID method_id) {
179 return generate_method_call(method_id, false, true);
180 }
181 CallJavaNode* generate_method_call_virtual(vmIntrinsics::ID method_id) {
182 return generate_method_call(method_id, true, false);
183 }
184 Node* load_field_from_object(Node* fromObj, const char* fieldName, const char* fieldTypeString, DecoratorSet decorators, bool is_static, ciInstanceKlass* fromKls);
185 Node* field_address_from_object(Node* fromObj, const char* fieldName, const char* fieldTypeString, bool is_exact, bool is_static, ciInstanceKlass* fromKls);
186
187 Node* make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2, StrIntrinsicNode::ArgEnc ae);
188 bool inline_string_compareTo(StrIntrinsicNode::ArgEnc ae);
189 bool inline_string_indexOf(StrIntrinsicNode::ArgEnc ae);
190 bool inline_string_indexOfI(StrIntrinsicNode::ArgEnc ae);
191 Node* make_indexOf_node(Node* src_start, Node* src_count, Node* tgt_start, Node* tgt_count,
192 RegionNode* region, Node* phi, StrIntrinsicNode::ArgEnc ae);
193 bool inline_string_indexOfChar(StrIntrinsicNode::ArgEnc ae);
194 bool inline_string_equals(StrIntrinsicNode::ArgEnc ae);
195 bool inline_string_toBytesU();
196 bool inline_string_getCharsU();
197 bool inline_string_copy(bool compress);
198 bool inline_string_char_access(bool is_store);
199 Node* round_double_node(Node* n);
200 bool runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName);
201 bool inline_math_native(vmIntrinsics::ID id);
202 bool inline_math(vmIntrinsics::ID id);
203 bool inline_double_math(vmIntrinsics::ID id);
204 bool inline_math_pow();
205 template <typename OverflowOp>
206 bool inline_math_overflow(Node* arg1, Node* arg2);
207 void inline_math_mathExact(Node* math, Node* test);
208 bool inline_math_addExactI(bool is_increment);
209 bool inline_math_addExactL(bool is_increment);
210 bool inline_math_multiplyExactI();
211 bool inline_math_multiplyExactL();
212 bool inline_math_multiplyHigh();
213 bool inline_math_negateExactI();
214 bool inline_math_negateExactL();
215 bool inline_math_subtractExactI(bool is_decrement);
216 bool inline_math_subtractExactL(bool is_decrement);
217 bool inline_min_max(vmIntrinsics::ID id);
218 bool inline_notify(vmIntrinsics::ID id);
219 Node* generate_min_max(vmIntrinsics::ID id, Node* x, Node* y);
220 // This returns Type::AnyPtr, RawPtr, or OopPtr.
221 int classify_unsafe_addr(Node* &base, Node* &offset, BasicType type);
222 Node* make_unsafe_address(Node*& base, Node* offset, BasicType type = T_ILLEGAL, bool can_cast = false);
223
224 typedef enum { Relaxed, Opaque, Volatile, Acquire, Release } AccessKind;
225 DecoratorSet mo_decorator_for_access_kind(AccessKind kind);
226 bool inline_unsafe_access(bool is_store, BasicType type, AccessKind kind, bool is_unaligned);
227 static bool klass_needs_init_guard(Node* kls);
228 bool inline_unsafe_allocate();
229 bool inline_unsafe_newArray(bool uninitialized);
230 bool inline_unsafe_writeback0();
231 bool inline_unsafe_writebackSync0(bool is_pre);
232 bool inline_unsafe_copyMemory();
233 bool inline_native_currentThread();
234
235 bool inline_native_time_funcs(address method, const char* funcName);
236 #ifdef JFR_HAVE_INTRINSICS
237 bool inline_native_classID();
238 bool inline_native_getEventWriter();
239 #endif
240 bool inline_native_Class_query(vmIntrinsics::ID id);
241 bool inline_native_subtype_check();
242 bool inline_native_getLength();
243 bool inline_array_copyOf(bool is_copyOfRange);
244 bool inline_array_equals(StrIntrinsicNode::ArgEnc ae);
245 bool inline_preconditions_checkIndex(BasicType bt);
246 void copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array);
247 bool inline_native_clone(bool is_virtual);
248 bool inline_native_Reflection_getCallerClass();
249 // Helper function for inlining native object hash method
250 bool inline_native_hashcode(bool is_virtual, bool is_static);
251 bool inline_native_getClass();
252
253 // Helper functions for inlining arraycopy
254 bool inline_arraycopy();
255 AllocateArrayNode* tightly_coupled_allocation(Node* ptr);
256 static CallStaticJavaNode* get_uncommon_trap_from_success_proj(Node* node);
257 SafePointNode* create_safepoint_with_state_before_array_allocation(const AllocateArrayNode* alloc) const;
258 void replace_unrelated_uncommon_traps_with_alloc_state(AllocateArrayNode* alloc, JVMState* saved_jvms_before_guards);
259 void replace_unrelated_uncommon_traps_with_alloc_state(JVMState* saved_jvms_before_guards);
260 void create_new_uncommon_trap(CallStaticJavaNode* uncommon_trap_call);
261 JVMState* arraycopy_restore_alloc_state(AllocateArrayNode* alloc, int& saved_reexecute_sp);
262 void arraycopy_move_allocation_here(AllocateArrayNode* alloc, Node* dest, JVMState* saved_jvms_before_guards, int saved_reexecute_sp,
263 uint new_idx);
264
265 typedef enum { LS_get_add, LS_get_set, LS_cmp_swap, LS_cmp_swap_weak, LS_cmp_exchange } LoadStoreKind;
266 bool inline_unsafe_load_store(BasicType type, LoadStoreKind kind, AccessKind access_kind);
267 bool inline_unsafe_fence(vmIntrinsics::ID id);
268 bool inline_onspinwait();
269 bool inline_fp_conversions(vmIntrinsics::ID id);
270 bool inline_number_methods(vmIntrinsics::ID id);
271 bool inline_reference_get();
272 bool inline_reference_refersTo0(bool is_phantom);
273 bool inline_Class_cast();
274 bool inline_aescrypt_Block(vmIntrinsics::ID id);
275 bool inline_cipherBlockChaining_AESCrypt(vmIntrinsics::ID id);
276 bool inline_electronicCodeBook_AESCrypt(vmIntrinsics::ID id);
277 bool inline_counterMode_AESCrypt(vmIntrinsics::ID id);
278 Node* inline_cipherBlockChaining_AESCrypt_predicate(bool decrypting);
279 Node* inline_electronicCodeBook_AESCrypt_predicate(bool decrypting);
280 Node* inline_counterMode_AESCrypt_predicate();
281 Node* get_key_start_from_aescrypt_object(Node* aescrypt_object);
282 bool inline_ghash_processBlocks();
283 bool inline_base64_encodeBlock();
284 bool inline_base64_decodeBlock();
285 bool inline_digestBase_implCompress(vmIntrinsics::ID id);
286 bool inline_digestBase_implCompressMB(int predicate);
287 bool inline_digestBase_implCompressMB(Node* digestBaseObj, ciInstanceKlass* instklass,
288 const char* state_type, address stubAddr, const char *stubName,
289 Node* src_start, Node* ofs, Node* limit);
290 Node* get_state_from_digest_object(Node *digestBase_object, const char* state_type);
291 Node* get_digest_length_from_digest_object(Node *digestBase_object);
292 Node* inline_digestBase_implCompressMB_predicate(int predicate);
293 bool inline_encodeISOArray(bool ascii);
294 bool inline_updateCRC32();
295 bool inline_updateBytesCRC32();
296 bool inline_updateByteBufferCRC32();
297 Node* get_table_from_crc32c_class(ciInstanceKlass *crc32c_class);
298 bool inline_updateBytesCRC32C();
299 bool inline_updateDirectByteBufferCRC32C();
300 bool inline_updateBytesAdler32();
301 bool inline_updateByteBufferAdler32();
302 bool inline_multiplyToLen();
303 bool inline_hasNegatives();
304 bool inline_squareToLen();
305 bool inline_mulAdd();
306 bool inline_montgomeryMultiply();
307 bool inline_montgomerySquare();
308 bool inline_bigIntegerShift(bool isRightShift);
309 bool inline_vectorizedMismatch();
310 bool inline_fma(vmIntrinsics::ID id);
311 bool inline_character_compare(vmIntrinsics::ID id);
312 bool inline_fp_min_max(vmIntrinsics::ID id);
313
314 bool inline_profileBoolean();
315 bool inline_isCompileConstant();
316
317 // Vector API support
318 bool inline_vector_nary_operation(int n);
319 bool inline_vector_broadcast_coerced();
320 bool inline_vector_shuffle_to_vector();
321 bool inline_vector_shuffle_iota();
322 bool inline_vector_mask_operation();
323 bool inline_vector_mem_operation(bool is_store);
324 bool inline_vector_gather_scatter(bool is_scatter);
325 bool inline_vector_reduction();
326 bool inline_vector_test();
327 bool inline_vector_blend();
328 bool inline_vector_rearrange();
329 bool inline_vector_compare();
330 bool inline_vector_broadcast_int();
331 bool inline_vector_convert();
332 bool inline_vector_extract();
333 bool inline_vector_insert();
334 Node* gen_call_to_svml(int vector_api_op_id, BasicType bt, int num_elem, Node* opd1, Node* opd2);
335
336 enum VectorMaskUseType {
337 VecMaskUseLoad,
338 VecMaskUseStore,
339 VecMaskUseAll,
340 VecMaskNotUsed
341 };
342
343 bool arch_supports_vector(int op, int num_elem, BasicType type, VectorMaskUseType mask_use_type, bool has_scalar_args = false);
344
345 void clear_upper_avx() {
346 #ifdef X86
347 if (UseAVX >= 2) {
348 C->set_clear_upper_avx(true);
349 }
350 #endif
351 }
352
353 bool inline_getObjectSize();
354
355 bool inline_blackhole();
356 };
357