1 /*
2 * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "opto/c2compiler.hpp"
27 #include "opto/compile.hpp"
28 #include "opto/optoreg.hpp"
29 #include "opto/output.hpp"
30 #include "opto/runtime.hpp"
31
32 // register information defined by ADLC
33 extern const char register_save_policy[];
34 extern const int register_save_type[];
35
36 const char* C2Compiler::retry_no_subsuming_loads() {
37 return "retry without subsuming loads";
38 }
39 const char* C2Compiler::retry_no_escape_analysis() {
40 return "retry without escape analysis";
41 }
42 const char* C2Compiler::retry_class_loading_during_parsing() {
43 return "retry class loading during parsing";
44 }
45 bool C2Compiler::init_c2_runtime() {
46
47 // Check assumptions used while running ADLC
48 Compile::adlc_verification();
49 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts");
50
51 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) {
52 OptoReg::vm2opto[i] = OptoReg::Bad;
53 }
54
55 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) {
56 VMReg r = OptoReg::as_VMReg(i);
57 if (r->is_valid()) {
58 OptoReg::vm2opto[r->value()] = i;
59 }
60 }
61
62 // Check that runtime and architecture description agree on callee-saved-floats
63 bool callee_saved_floats = false;
64 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) {
65 // Is there a callee-saved float or double?
66 if( register_save_policy[i] == 'E' /* callee-saved */ &&
67 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) {
68 callee_saved_floats = true;
69 }
70 }
71
72 DEBUG_ONLY( Node::init_NodeProperty(); )
73
74 Compile::pd_compiler2_init();
75
76 CompilerThread* thread = CompilerThread::current();
77
78 HandleMark handle_mark(thread);
79 return OptoRuntime::generate(thread->env());
80 }
81
82 void C2Compiler::initialize() {
83 // The first compiler thread that gets here will initialize the
84 // small amount of global state (and runtime stubs) that C2 needs.
85
86 // There is a race possible once at startup and then we're fine
87
88 // Note that this is being called from a compiler thread not the
89 // main startup thread.
90 if (should_perform_init()) {
91 bool successful = C2Compiler::init_c2_runtime();
92 int new_state = (successful) ? initialized : failed;
93 set_state(new_state);
94 }
95 }
96
97 void C2Compiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) {
98 assert(is_initialized(), "Compiler thread must be initialized");
99
100 bool subsume_loads = SubsumeLoads;
101 bool do_escape_analysis = DoEscapeAnalysis && !env->should_retain_local_variables();
102 bool eliminate_boxing = EliminateAutoBox;
103 while (!env->failing()) {
104 // Attempt to compile while subsuming loads into machine instructions.
105 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing);
106
107 // Check result and retry if appropriate.
108 if (C.failure_reason() != NULL) {
109 if (C.failure_reason_is(retry_class_loading_during_parsing())) {
110 env->report_failure(C.failure_reason());
111 continue; // retry
112 }
113 if (C.failure_reason_is(retry_no_subsuming_loads())) {
114 assert(subsume_loads, "must make progress");
115 subsume_loads = false;
116 env->report_failure(C.failure_reason());
117 continue; // retry
118 }
119 if (C.failure_reason_is(retry_no_escape_analysis())) {
120 assert(do_escape_analysis, "must make progress");
121 do_escape_analysis = false;
122 env->report_failure(C.failure_reason());
123 continue; // retry
124 }
125 if (C.has_boxed_value()) {
126 // Recompile without boxing elimination regardless failure reason.
127 assert(eliminate_boxing, "must make progress");
128 eliminate_boxing = false;
129 env->report_failure(C.failure_reason());
130 continue; // retry
131 }
132 // Pass any other failure reason up to the ciEnv.
133 // Note that serious, irreversible failures are already logged
134 // on the ciEnv via env->record_method_not_compilable().
135 env->record_failure(C.failure_reason());
136 }
137 if (StressRecompilation) {
138 if (subsume_loads) {
139 subsume_loads = false;
140 continue; // retry
141 }
142 if (do_escape_analysis) {
143 do_escape_analysis = false;
144 continue; // retry
145 }
146 }
147
148 // print inlining for last compilation only
149 C.dump_print_inlining();
150
151 // No retry; just break the loop.
152 break;
153 }
154 }
155
156 void C2Compiler::print_timers() {
157 Compile::print_timers();
158 }
159
160 bool C2Compiler::is_intrinsic_supported(methodHandle method, bool is_virtual) {
161 vmIntrinsics::ID id = method->intrinsic_id();
162 assert(id != vmIntrinsics::_none, "must be a VM intrinsic");
163
164 if (id < vmIntrinsics::FIRST_ID || id > vmIntrinsics::LAST_COMPILER_INLINE) {
165 return false;
166 }
167
168 // Only Object.hashCode and Object.clone intrinsics implement also a virtual
169 // dispatch because calling both methods is expensive but both methods are
170 // frequently overridden. All other intrinsics implement only a non-virtual
171 // dispatch.
172 if (is_virtual) {
173 switch (id) {
174 case vmIntrinsics::_hashCode:
175 case vmIntrinsics::_clone:
176 break;
177 default:
178 return false;
179 }
180 }
181
182 switch (id) {
183 case vmIntrinsics::_compareTo:
184 if (!Matcher::match_rule_supported(Op_StrComp)) return false;
185 break;
186 case vmIntrinsics::_equals:
187 if (!Matcher::match_rule_supported(Op_StrEquals)) return false;
188 break;
189 case vmIntrinsics::_equalsC:
190 if (!Matcher::match_rule_supported(Op_AryEq)) return false;
191 break;
192 case vmIntrinsics::_copyMemory:
193 if (StubRoutines::unsafe_arraycopy() == NULL) return false;
194 break;
195 case vmIntrinsics::_encodeISOArray:
196 if (!Matcher::match_rule_supported(Op_EncodeISOArray)) return false;
197 break;
198 case vmIntrinsics::_bitCount_i:
199 if (!Matcher::match_rule_supported(Op_PopCountI)) return false;
200 break;
201 case vmIntrinsics::_bitCount_l:
202 if (!Matcher::match_rule_supported(Op_PopCountL)) return false;
203 break;
204 case vmIntrinsics::_numberOfLeadingZeros_i:
205 if (!Matcher::match_rule_supported(Op_CountLeadingZerosI)) return false;
206 break;
207 case vmIntrinsics::_numberOfLeadingZeros_l:
208 if (!Matcher::match_rule_supported(Op_CountLeadingZerosL)) return false;
209 break;
210 case vmIntrinsics::_numberOfTrailingZeros_i:
211 if (!Matcher::match_rule_supported(Op_CountTrailingZerosI)) return false;
212 break;
213 case vmIntrinsics::_numberOfTrailingZeros_l:
214 if (!Matcher::match_rule_supported(Op_CountTrailingZerosL)) return false;
215 break;
216 case vmIntrinsics::_reverseBytes_c:
217 if (!Matcher::match_rule_supported(Op_ReverseBytesUS)) return false;
218 break;
219 case vmIntrinsics::_reverseBytes_s:
220 if (!Matcher::match_rule_supported(Op_ReverseBytesS)) return false;
221 break;
222 case vmIntrinsics::_reverseBytes_i:
223 if (!Matcher::match_rule_supported(Op_ReverseBytesI)) return false;
224 break;
225 case vmIntrinsics::_reverseBytes_l:
226 if (!Matcher::match_rule_supported(Op_ReverseBytesL)) return false;
227 break;
228 case vmIntrinsics::_compareAndSwapObject:
229 #ifdef _LP64
230 if (!UseCompressedOops && !Matcher::match_rule_supported(Op_CompareAndSwapP)) return false;
231 #endif
232 break;
233 case vmIntrinsics::_compareAndSwapLong:
234 if (!Matcher::match_rule_supported(Op_CompareAndSwapL)) return false;
235 break;
236 case vmIntrinsics::_getAndAddInt:
237 if (!Matcher::match_rule_supported(Op_GetAndAddI)) return false;
238 break;
239 case vmIntrinsics::_getAndAddLong:
240 if (!Matcher::match_rule_supported(Op_GetAndAddL)) return false;
241 break;
242 case vmIntrinsics::_getAndSetInt:
243 if (!Matcher::match_rule_supported(Op_GetAndSetI)) return false;
244 break;
245 case vmIntrinsics::_getAndSetLong:
246 if (!Matcher::match_rule_supported(Op_GetAndSetL)) return false;
247 break;
248 case vmIntrinsics::_getAndSetObject:
249 #ifdef _LP64
250 if (!UseCompressedOops && !Matcher::match_rule_supported(Op_GetAndSetP)) return false;
251 if (UseCompressedOops && !Matcher::match_rule_supported(Op_GetAndSetN)) return false;
252 break;
253 #else
254 if (!Matcher::match_rule_supported(Op_GetAndSetP)) return false;
255 break;
256 #endif
257 case vmIntrinsics::_incrementExactI:
258 case vmIntrinsics::_addExactI:
259 if (!Matcher::match_rule_supported(Op_OverflowAddI)) return false;
260 break;
261 case vmIntrinsics::_incrementExactL:
262 case vmIntrinsics::_addExactL:
263 if (!Matcher::match_rule_supported(Op_OverflowAddL)) return false;
264 break;
265 case vmIntrinsics::_decrementExactI:
266 case vmIntrinsics::_subtractExactI:
267 if (!Matcher::match_rule_supported(Op_OverflowSubI)) return false;
268 break;
269 case vmIntrinsics::_decrementExactL:
270 case vmIntrinsics::_subtractExactL:
271 if (!Matcher::match_rule_supported(Op_OverflowSubL)) return false;
272 break;
273 case vmIntrinsics::_negateExactI:
274 if (!Matcher::match_rule_supported(Op_OverflowSubI)) return false;
275 break;
276 case vmIntrinsics::_negateExactL:
277 if (!Matcher::match_rule_supported(Op_OverflowSubL)) return false;
278 break;
279 case vmIntrinsics::_multiplyExactI:
280 if (!Matcher::match_rule_supported(Op_OverflowMulI)) return false;
281 break;
282 case vmIntrinsics::_multiplyExactL:
283 if (!Matcher::match_rule_supported(Op_OverflowMulL)) return false;
284 break;
285 case vmIntrinsics::_getCallerClass:
286 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) return false;
287 break;
288 case vmIntrinsics::_hashCode:
289 case vmIntrinsics::_identityHashCode:
290 case vmIntrinsics::_getClass:
291 case vmIntrinsics::_dsin:
292 case vmIntrinsics::_dcos:
293 case vmIntrinsics::_dtan:
294 case vmIntrinsics::_dabs:
295 case vmIntrinsics::_datan2:
296 case vmIntrinsics::_dsqrt:
297 case vmIntrinsics::_dexp:
298 case vmIntrinsics::_dlog:
299 case vmIntrinsics::_dlog10:
300 case vmIntrinsics::_dpow:
301 case vmIntrinsics::_min:
302 case vmIntrinsics::_max:
303 case vmIntrinsics::_arraycopy:
304 case vmIntrinsics::_indexOf:
305 case vmIntrinsics::_getObject:
306 case vmIntrinsics::_getBoolean:
307 case vmIntrinsics::_getByte:
308 case vmIntrinsics::_getShort:
309 case vmIntrinsics::_getChar:
310 case vmIntrinsics::_getInt:
311 case vmIntrinsics::_getLong:
312 case vmIntrinsics::_getFloat:
313 case vmIntrinsics::_getDouble:
314 case vmIntrinsics::_putObject:
315 case vmIntrinsics::_putBoolean:
316 case vmIntrinsics::_putByte:
317 case vmIntrinsics::_putShort:
318 case vmIntrinsics::_putChar:
319 case vmIntrinsics::_putInt:
320 case vmIntrinsics::_putLong:
321 case vmIntrinsics::_putFloat:
322 case vmIntrinsics::_putDouble:
323 case vmIntrinsics::_getByte_raw:
324 case vmIntrinsics::_getShort_raw:
325 case vmIntrinsics::_getChar_raw:
326 case vmIntrinsics::_getInt_raw:
327 case vmIntrinsics::_getLong_raw:
328 case vmIntrinsics::_getFloat_raw:
329 case vmIntrinsics::_getDouble_raw:
330 case vmIntrinsics::_getAddress_raw:
331 case vmIntrinsics::_putByte_raw:
332 case vmIntrinsics::_putShort_raw:
333 case vmIntrinsics::_putChar_raw:
334 case vmIntrinsics::_putInt_raw:
335 case vmIntrinsics::_putLong_raw:
336 case vmIntrinsics::_putFloat_raw:
337 case vmIntrinsics::_putDouble_raw:
338 case vmIntrinsics::_putAddress_raw:
339 case vmIntrinsics::_getObjectVolatile:
340 case vmIntrinsics::_getBooleanVolatile:
341 case vmIntrinsics::_getByteVolatile:
342 case vmIntrinsics::_getShortVolatile:
343 case vmIntrinsics::_getCharVolatile:
344 case vmIntrinsics::_getIntVolatile:
345 case vmIntrinsics::_getLongVolatile:
346 case vmIntrinsics::_getFloatVolatile:
347 case vmIntrinsics::_getDoubleVolatile:
348 case vmIntrinsics::_putObjectVolatile:
349 case vmIntrinsics::_putBooleanVolatile:
350 case vmIntrinsics::_putByteVolatile:
351 case vmIntrinsics::_putShortVolatile:
352 case vmIntrinsics::_putCharVolatile:
353 case vmIntrinsics::_putIntVolatile:
354 case vmIntrinsics::_putLongVolatile:
355 case vmIntrinsics::_putFloatVolatile:
356 case vmIntrinsics::_putDoubleVolatile:
357 case vmIntrinsics::_getShortUnaligned:
358 case vmIntrinsics::_getCharUnaligned:
359 case vmIntrinsics::_getIntUnaligned:
360 case vmIntrinsics::_getLongUnaligned:
361 case vmIntrinsics::_putShortUnaligned:
362 case vmIntrinsics::_putCharUnaligned:
363 case vmIntrinsics::_putIntUnaligned:
364 case vmIntrinsics::_putLongUnaligned:
365 case vmIntrinsics::_compareAndSwapInt:
366 case vmIntrinsics::_putOrderedObject:
367 case vmIntrinsics::_putOrderedInt:
368 case vmIntrinsics::_putOrderedLong:
369 case vmIntrinsics::_loadFence:
370 case vmIntrinsics::_storeFence:
371 case vmIntrinsics::_fullFence:
372 case vmIntrinsics::_currentThread:
373 case vmIntrinsics::_isInterrupted:
374 #ifdef TRACE_HAVE_INTRINSICS
375 case vmIntrinsics::_classID:
376 case vmIntrinsics::_threadID:
377 case vmIntrinsics::_counterTime:
378 #endif
379 case vmIntrinsics::_currentTimeMillis:
380 case vmIntrinsics::_nanoTime:
381 case vmIntrinsics::_allocateInstance:
382 case vmIntrinsics::_newArray:
383 case vmIntrinsics::_getLength:
384 case vmIntrinsics::_copyOf:
385 case vmIntrinsics::_copyOfRange:
386 case vmIntrinsics::_clone:
387 case vmIntrinsics::_isAssignableFrom:
388 case vmIntrinsics::_isInstance:
389 case vmIntrinsics::_getModifiers:
390 case vmIntrinsics::_isInterface:
391 case vmIntrinsics::_isArray:
392 case vmIntrinsics::_isPrimitive:
393 case vmIntrinsics::_getSuperclass:
394 case vmIntrinsics::_getClassAccessFlags:
395 case vmIntrinsics::_floatToRawIntBits:
396 case vmIntrinsics::_floatToIntBits:
397 case vmIntrinsics::_intBitsToFloat:
398 case vmIntrinsics::_doubleToRawLongBits:
399 case vmIntrinsics::_doubleToLongBits:
400 case vmIntrinsics::_longBitsToDouble:
401 case vmIntrinsics::_Reference_get:
402 case vmIntrinsics::_Class_cast:
403 case vmIntrinsics::_aescrypt_encryptBlock:
404 case vmIntrinsics::_aescrypt_decryptBlock:
405 case vmIntrinsics::_cipherBlockChaining_encryptAESCrypt:
406 case vmIntrinsics::_cipherBlockChaining_decryptAESCrypt:
407 case vmIntrinsics::_sha_implCompress:
408 case vmIntrinsics::_sha2_implCompress:
409 case vmIntrinsics::_sha5_implCompress:
410 case vmIntrinsics::_digestBase_implCompressMB:
411 case vmIntrinsics::_multiplyToLen:
412 case vmIntrinsics::_squareToLen:
413 case vmIntrinsics::_mulAdd:
414 case vmIntrinsics::_montgomeryMultiply:
415 case vmIntrinsics::_montgomerySquare:
416 case vmIntrinsics::_ghash_processBlocks:
417 case vmIntrinsics::_updateCRC32:
418 case vmIntrinsics::_updateBytesCRC32:
419 case vmIntrinsics::_updateByteBufferCRC32:
420 case vmIntrinsics::_updateBytesCRC32C:
421 case vmIntrinsics::_updateDirectByteBufferCRC32C:
422 case vmIntrinsics::_profileBoolean:
423 case vmIntrinsics::_isCompileConstant:
424 break;
425 default:
426 return false;
427 }
428 return true;
429 }
430
431 int C2Compiler::initial_code_buffer_size() {
432 assert(SegmentedCodeCache, "Should be only used with a segmented code cache");
433 return Compile::MAX_inst_size + Compile::MAX_locs_size + initial_const_capacity;
434 }