Mercurial > hg > truffle
annotate src/share/vm/opto/compile.cpp @ 12966:b2ee5dc63353
8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti
author | roland |
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date | Wed, 23 Oct 2013 12:40:23 +0200 |
parents | 435c7b4577cd |
children | e428d5e768e3 94a83e0f9ce1 2b8e28fdf503 |
rev | line source |
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0 | 1 /* |
10405 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
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27 #include "asm/macroAssembler.inline.hpp" |
1972 | 28 #include "classfile/systemDictionary.hpp" |
29 #include "code/exceptionHandlerTable.hpp" | |
30 #include "code/nmethod.hpp" | |
31 #include "compiler/compileLog.hpp" | |
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32 #include "compiler/disassembler.hpp" |
1972 | 33 #include "compiler/oopMap.hpp" |
34 #include "opto/addnode.hpp" | |
35 #include "opto/block.hpp" | |
36 #include "opto/c2compiler.hpp" | |
37 #include "opto/callGenerator.hpp" | |
38 #include "opto/callnode.hpp" | |
39 #include "opto/cfgnode.hpp" | |
40 #include "opto/chaitin.hpp" | |
41 #include "opto/compile.hpp" | |
42 #include "opto/connode.hpp" | |
43 #include "opto/divnode.hpp" | |
44 #include "opto/escape.hpp" | |
45 #include "opto/idealGraphPrinter.hpp" | |
46 #include "opto/loopnode.hpp" | |
47 #include "opto/machnode.hpp" | |
48 #include "opto/macro.hpp" | |
49 #include "opto/matcher.hpp" | |
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50 #include "opto/mathexactnode.hpp" |
1972 | 51 #include "opto/memnode.hpp" |
52 #include "opto/mulnode.hpp" | |
53 #include "opto/node.hpp" | |
54 #include "opto/opcodes.hpp" | |
55 #include "opto/output.hpp" | |
56 #include "opto/parse.hpp" | |
57 #include "opto/phaseX.hpp" | |
58 #include "opto/rootnode.hpp" | |
59 #include "opto/runtime.hpp" | |
60 #include "opto/stringopts.hpp" | |
61 #include "opto/type.hpp" | |
62 #include "opto/vectornode.hpp" | |
63 #include "runtime/arguments.hpp" | |
64 #include "runtime/signature.hpp" | |
65 #include "runtime/stubRoutines.hpp" | |
66 #include "runtime/timer.hpp" | |
10405 | 67 #include "trace/tracing.hpp" |
1972 | 68 #include "utilities/copy.hpp" |
69 #ifdef TARGET_ARCH_MODEL_x86_32 | |
70 # include "adfiles/ad_x86_32.hpp" | |
71 #endif | |
72 #ifdef TARGET_ARCH_MODEL_x86_64 | |
73 # include "adfiles/ad_x86_64.hpp" | |
74 #endif | |
75 #ifdef TARGET_ARCH_MODEL_sparc | |
76 # include "adfiles/ad_sparc.hpp" | |
77 #endif | |
78 #ifdef TARGET_ARCH_MODEL_zero | |
79 # include "adfiles/ad_zero.hpp" | |
80 #endif | |
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81 #ifdef TARGET_ARCH_MODEL_arm |
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82 # include "adfiles/ad_arm.hpp" |
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83 #endif |
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84 #ifdef TARGET_ARCH_MODEL_ppc |
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85 # include "adfiles/ad_ppc.hpp" |
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86 #endif |
0 | 87 |
2008 | 88 |
89 // -------------------- Compile::mach_constant_base_node ----------------------- | |
90 // Constant table base node singleton. | |
91 MachConstantBaseNode* Compile::mach_constant_base_node() { | |
92 if (_mach_constant_base_node == NULL) { | |
93 _mach_constant_base_node = new (C) MachConstantBaseNode(); | |
94 _mach_constant_base_node->add_req(C->root()); | |
95 } | |
96 return _mach_constant_base_node; | |
97 } | |
98 | |
99 | |
0 | 100 /// Support for intrinsics. |
101 | |
102 // Return the index at which m must be inserted (or already exists). | |
103 // The sort order is by the address of the ciMethod, with is_virtual as minor key. | |
104 int Compile::intrinsic_insertion_index(ciMethod* m, bool is_virtual) { | |
105 #ifdef ASSERT | |
106 for (int i = 1; i < _intrinsics->length(); i++) { | |
107 CallGenerator* cg1 = _intrinsics->at(i-1); | |
108 CallGenerator* cg2 = _intrinsics->at(i); | |
109 assert(cg1->method() != cg2->method() | |
110 ? cg1->method() < cg2->method() | |
111 : cg1->is_virtual() < cg2->is_virtual(), | |
112 "compiler intrinsics list must stay sorted"); | |
113 } | |
114 #endif | |
115 // Binary search sorted list, in decreasing intervals [lo, hi]. | |
116 int lo = 0, hi = _intrinsics->length()-1; | |
117 while (lo <= hi) { | |
118 int mid = (uint)(hi + lo) / 2; | |
119 ciMethod* mid_m = _intrinsics->at(mid)->method(); | |
120 if (m < mid_m) { | |
121 hi = mid-1; | |
122 } else if (m > mid_m) { | |
123 lo = mid+1; | |
124 } else { | |
125 // look at minor sort key | |
126 bool mid_virt = _intrinsics->at(mid)->is_virtual(); | |
127 if (is_virtual < mid_virt) { | |
128 hi = mid-1; | |
129 } else if (is_virtual > mid_virt) { | |
130 lo = mid+1; | |
131 } else { | |
132 return mid; // exact match | |
133 } | |
134 } | |
135 } | |
136 return lo; // inexact match | |
137 } | |
138 | |
139 void Compile::register_intrinsic(CallGenerator* cg) { | |
140 if (_intrinsics == NULL) { | |
7473 | 141 _intrinsics = new (comp_arena())GrowableArray<CallGenerator*>(comp_arena(), 60, 0, NULL); |
0 | 142 } |
143 // This code is stolen from ciObjectFactory::insert. | |
144 // Really, GrowableArray should have methods for | |
145 // insert_at, remove_at, and binary_search. | |
146 int len = _intrinsics->length(); | |
147 int index = intrinsic_insertion_index(cg->method(), cg->is_virtual()); | |
148 if (index == len) { | |
149 _intrinsics->append(cg); | |
150 } else { | |
151 #ifdef ASSERT | |
152 CallGenerator* oldcg = _intrinsics->at(index); | |
153 assert(oldcg->method() != cg->method() || oldcg->is_virtual() != cg->is_virtual(), "don't register twice"); | |
154 #endif | |
155 _intrinsics->append(_intrinsics->at(len-1)); | |
156 int pos; | |
157 for (pos = len-2; pos >= index; pos--) { | |
158 _intrinsics->at_put(pos+1,_intrinsics->at(pos)); | |
159 } | |
160 _intrinsics->at_put(index, cg); | |
161 } | |
162 assert(find_intrinsic(cg->method(), cg->is_virtual()) == cg, "registration worked"); | |
163 } | |
164 | |
165 CallGenerator* Compile::find_intrinsic(ciMethod* m, bool is_virtual) { | |
166 assert(m->is_loaded(), "don't try this on unloaded methods"); | |
167 if (_intrinsics != NULL) { | |
168 int index = intrinsic_insertion_index(m, is_virtual); | |
169 if (index < _intrinsics->length() | |
170 && _intrinsics->at(index)->method() == m | |
171 && _intrinsics->at(index)->is_virtual() == is_virtual) { | |
172 return _intrinsics->at(index); | |
173 } | |
174 } | |
175 // Lazily create intrinsics for intrinsic IDs well-known in the runtime. | |
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176 if (m->intrinsic_id() != vmIntrinsics::_none && |
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177 m->intrinsic_id() <= vmIntrinsics::LAST_COMPILER_INLINE) { |
0 | 178 CallGenerator* cg = make_vm_intrinsic(m, is_virtual); |
179 if (cg != NULL) { | |
180 // Save it for next time: | |
181 register_intrinsic(cg); | |
182 return cg; | |
183 } else { | |
184 gather_intrinsic_statistics(m->intrinsic_id(), is_virtual, _intrinsic_disabled); | |
185 } | |
186 } | |
187 return NULL; | |
188 } | |
189 | |
190 // Compile:: register_library_intrinsics and make_vm_intrinsic are defined | |
191 // in library_call.cpp. | |
192 | |
193 | |
194 #ifndef PRODUCT | |
195 // statistics gathering... | |
196 | |
197 juint Compile::_intrinsic_hist_count[vmIntrinsics::ID_LIMIT] = {0}; | |
198 jubyte Compile::_intrinsic_hist_flags[vmIntrinsics::ID_LIMIT] = {0}; | |
199 | |
200 bool Compile::gather_intrinsic_statistics(vmIntrinsics::ID id, bool is_virtual, int flags) { | |
201 assert(id > vmIntrinsics::_none && id < vmIntrinsics::ID_LIMIT, "oob"); | |
202 int oflags = _intrinsic_hist_flags[id]; | |
203 assert(flags != 0, "what happened?"); | |
204 if (is_virtual) { | |
205 flags |= _intrinsic_virtual; | |
206 } | |
207 bool changed = (flags != oflags); | |
208 if ((flags & _intrinsic_worked) != 0) { | |
209 juint count = (_intrinsic_hist_count[id] += 1); | |
210 if (count == 1) { | |
211 changed = true; // first time | |
212 } | |
213 // increment the overall count also: | |
214 _intrinsic_hist_count[vmIntrinsics::_none] += 1; | |
215 } | |
216 if (changed) { | |
217 if (((oflags ^ flags) & _intrinsic_virtual) != 0) { | |
218 // Something changed about the intrinsic's virtuality. | |
219 if ((flags & _intrinsic_virtual) != 0) { | |
220 // This is the first use of this intrinsic as a virtual call. | |
221 if (oflags != 0) { | |
222 // We already saw it as a non-virtual, so note both cases. | |
223 flags |= _intrinsic_both; | |
224 } | |
225 } else if ((oflags & _intrinsic_both) == 0) { | |
226 // This is the first use of this intrinsic as a non-virtual | |
227 flags |= _intrinsic_both; | |
228 } | |
229 } | |
230 _intrinsic_hist_flags[id] = (jubyte) (oflags | flags); | |
231 } | |
232 // update the overall flags also: | |
233 _intrinsic_hist_flags[vmIntrinsics::_none] |= (jubyte) flags; | |
234 return changed; | |
235 } | |
236 | |
237 static char* format_flags(int flags, char* buf) { | |
238 buf[0] = 0; | |
239 if ((flags & Compile::_intrinsic_worked) != 0) strcat(buf, ",worked"); | |
240 if ((flags & Compile::_intrinsic_failed) != 0) strcat(buf, ",failed"); | |
241 if ((flags & Compile::_intrinsic_disabled) != 0) strcat(buf, ",disabled"); | |
242 if ((flags & Compile::_intrinsic_virtual) != 0) strcat(buf, ",virtual"); | |
243 if ((flags & Compile::_intrinsic_both) != 0) strcat(buf, ",nonvirtual"); | |
244 if (buf[0] == 0) strcat(buf, ","); | |
245 assert(buf[0] == ',', "must be"); | |
246 return &buf[1]; | |
247 } | |
248 | |
249 void Compile::print_intrinsic_statistics() { | |
250 char flagsbuf[100]; | |
251 ttyLocker ttyl; | |
252 if (xtty != NULL) xtty->head("statistics type='intrinsic'"); | |
253 tty->print_cr("Compiler intrinsic usage:"); | |
254 juint total = _intrinsic_hist_count[vmIntrinsics::_none]; | |
255 if (total == 0) total = 1; // avoid div0 in case of no successes | |
256 #define PRINT_STAT_LINE(name, c, f) \ | |
257 tty->print_cr(" %4d (%4.1f%%) %s (%s)", (int)(c), ((c) * 100.0) / total, name, f); | |
258 for (int index = 1 + (int)vmIntrinsics::_none; index < (int)vmIntrinsics::ID_LIMIT; index++) { | |
259 vmIntrinsics::ID id = (vmIntrinsics::ID) index; | |
260 int flags = _intrinsic_hist_flags[id]; | |
261 juint count = _intrinsic_hist_count[id]; | |
262 if ((flags | count) != 0) { | |
263 PRINT_STAT_LINE(vmIntrinsics::name_at(id), count, format_flags(flags, flagsbuf)); | |
264 } | |
265 } | |
266 PRINT_STAT_LINE("total", total, format_flags(_intrinsic_hist_flags[vmIntrinsics::_none], flagsbuf)); | |
267 if (xtty != NULL) xtty->tail("statistics"); | |
268 } | |
269 | |
270 void Compile::print_statistics() { | |
271 { ttyLocker ttyl; | |
272 if (xtty != NULL) xtty->head("statistics type='opto'"); | |
273 Parse::print_statistics(); | |
274 PhaseCCP::print_statistics(); | |
275 PhaseRegAlloc::print_statistics(); | |
276 Scheduling::print_statistics(); | |
277 PhasePeephole::print_statistics(); | |
278 PhaseIdealLoop::print_statistics(); | |
279 if (xtty != NULL) xtty->tail("statistics"); | |
280 } | |
281 if (_intrinsic_hist_flags[vmIntrinsics::_none] != 0) { | |
282 // put this under its own <statistics> element. | |
283 print_intrinsic_statistics(); | |
284 } | |
285 } | |
286 #endif //PRODUCT | |
287 | |
288 // Support for bundling info | |
289 Bundle* Compile::node_bundling(const Node *n) { | |
290 assert(valid_bundle_info(n), "oob"); | |
291 return &_node_bundling_base[n->_idx]; | |
292 } | |
293 | |
294 bool Compile::valid_bundle_info(const Node *n) { | |
295 return (_node_bundling_limit > n->_idx); | |
296 } | |
297 | |
298 | |
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299 void Compile::gvn_replace_by(Node* n, Node* nn) { |
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300 for (DUIterator_Last imin, i = n->last_outs(imin); i >= imin; ) { |
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301 Node* use = n->last_out(i); |
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302 bool is_in_table = initial_gvn()->hash_delete(use); |
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303 uint uses_found = 0; |
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304 for (uint j = 0; j < use->len(); j++) { |
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305 if (use->in(j) == n) { |
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306 if (j < use->req()) |
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307 use->set_req(j, nn); |
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308 else |
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309 use->set_prec(j, nn); |
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310 uses_found++; |
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311 } |
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312 } |
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313 if (is_in_table) { |
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314 // reinsert into table |
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315 initial_gvn()->hash_find_insert(use); |
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316 } |
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317 record_for_igvn(use); |
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318 i -= uses_found; // we deleted 1 or more copies of this edge |
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319 } |
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320 } |
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321 |
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322 |
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323 static inline bool not_a_node(const Node* n) { |
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324 if (n == NULL) return true; |
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325 if (((intptr_t)n & 1) != 0) return true; // uninitialized, etc. |
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326 if (*(address*)n == badAddress) return true; // kill by Node::destruct |
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327 return false; |
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328 } |
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329 |
0 | 330 // Identify all nodes that are reachable from below, useful. |
331 // Use breadth-first pass that records state in a Unique_Node_List, | |
332 // recursive traversal is slower. | |
333 void Compile::identify_useful_nodes(Unique_Node_List &useful) { | |
334 int estimated_worklist_size = unique(); | |
335 useful.map( estimated_worklist_size, NULL ); // preallocate space | |
336 | |
337 // Initialize worklist | |
338 if (root() != NULL) { useful.push(root()); } | |
339 // If 'top' is cached, declare it useful to preserve cached node | |
340 if( cached_top_node() ) { useful.push(cached_top_node()); } | |
341 | |
342 // Push all useful nodes onto the list, breadthfirst | |
343 for( uint next = 0; next < useful.size(); ++next ) { | |
344 assert( next < unique(), "Unique useful nodes < total nodes"); | |
345 Node *n = useful.at(next); | |
346 uint max = n->len(); | |
347 for( uint i = 0; i < max; ++i ) { | |
348 Node *m = n->in(i); | |
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349 if (not_a_node(m)) continue; |
0 | 350 useful.push(m); |
351 } | |
352 } | |
353 } | |
354 | |
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355 // Update dead_node_list with any missing dead nodes using useful |
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356 // list. Consider all non-useful nodes to be useless i.e., dead nodes. |
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357 void Compile::update_dead_node_list(Unique_Node_List &useful) { |
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358 uint max_idx = unique(); |
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359 VectorSet& useful_node_set = useful.member_set(); |
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360 |
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361 for (uint node_idx = 0; node_idx < max_idx; node_idx++) { |
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362 // If node with index node_idx is not in useful set, |
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363 // mark it as dead in dead node list. |
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364 if (! useful_node_set.test(node_idx) ) { |
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365 record_dead_node(node_idx); |
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366 } |
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367 } |
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368 } |
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369 |
7473 | 370 void Compile::remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful) { |
371 int shift = 0; | |
372 for (int i = 0; i < inlines->length(); i++) { | |
373 CallGenerator* cg = inlines->at(i); | |
374 CallNode* call = cg->call_node(); | |
375 if (shift > 0) { | |
376 inlines->at_put(i-shift, cg); | |
377 } | |
378 if (!useful.member(call)) { | |
379 shift++; | |
380 } | |
381 } | |
382 inlines->trunc_to(inlines->length()-shift); | |
383 } | |
384 | |
0 | 385 // Disconnect all useless nodes by disconnecting those at the boundary. |
386 void Compile::remove_useless_nodes(Unique_Node_List &useful) { | |
387 uint next = 0; | |
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388 while (next < useful.size()) { |
0 | 389 Node *n = useful.at(next++); |
390 // Use raw traversal of out edges since this code removes out edges | |
391 int max = n->outcnt(); | |
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392 for (int j = 0; j < max; ++j) { |
0 | 393 Node* child = n->raw_out(j); |
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394 if (! useful.member(child)) { |
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395 assert(!child->is_top() || child != top(), |
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396 "If top is cached in Compile object it is in useful list"); |
0 | 397 // Only need to remove this out-edge to the useless node |
398 n->raw_del_out(j); | |
399 --j; | |
400 --max; | |
401 } | |
402 } | |
403 if (n->outcnt() == 1 && n->has_special_unique_user()) { | |
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404 record_for_igvn(n->unique_out()); |
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405 } |
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406 } |
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407 // Remove useless macro and predicate opaq nodes |
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408 for (int i = C->macro_count()-1; i >= 0; i--) { |
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409 Node* n = C->macro_node(i); |
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410 if (!useful.member(n)) { |
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411 remove_macro_node(n); |
0 | 412 } |
413 } | |
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414 // Remove useless expensive node |
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415 for (int i = C->expensive_count()-1; i >= 0; i--) { |
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416 Node* n = C->expensive_node(i); |
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417 if (!useful.member(n)) { |
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418 remove_expensive_node(n); |
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419 } |
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420 } |
7473 | 421 // clean up the late inline lists |
422 remove_useless_late_inlines(&_string_late_inlines, useful); | |
10278 | 423 remove_useless_late_inlines(&_boxing_late_inlines, useful); |
7473 | 424 remove_useless_late_inlines(&_late_inlines, useful); |
0 | 425 debug_only(verify_graph_edges(true/*check for no_dead_code*/);) |
426 } | |
427 | |
428 //------------------------------frame_size_in_words----------------------------- | |
429 // frame_slots in units of words | |
430 int Compile::frame_size_in_words() const { | |
431 // shift is 0 in LP32 and 1 in LP64 | |
432 const int shift = (LogBytesPerWord - LogBytesPerInt); | |
433 int words = _frame_slots >> shift; | |
434 assert( words << shift == _frame_slots, "frame size must be properly aligned in LP64" ); | |
435 return words; | |
436 } | |
437 | |
438 // ============================================================================ | |
439 //------------------------------CompileWrapper--------------------------------- | |
440 class CompileWrapper : public StackObj { | |
441 Compile *const _compile; | |
442 public: | |
443 CompileWrapper(Compile* compile); | |
444 | |
445 ~CompileWrapper(); | |
446 }; | |
447 | |
448 CompileWrapper::CompileWrapper(Compile* compile) : _compile(compile) { | |
449 // the Compile* pointer is stored in the current ciEnv: | |
450 ciEnv* env = compile->env(); | |
451 assert(env == ciEnv::current(), "must already be a ciEnv active"); | |
452 assert(env->compiler_data() == NULL, "compile already active?"); | |
453 env->set_compiler_data(compile); | |
454 assert(compile == Compile::current(), "sanity"); | |
455 | |
456 compile->set_type_dict(NULL); | |
457 compile->set_type_hwm(NULL); | |
458 compile->set_type_last_size(0); | |
459 compile->set_last_tf(NULL, NULL); | |
460 compile->set_indexSet_arena(NULL); | |
461 compile->set_indexSet_free_block_list(NULL); | |
462 compile->init_type_arena(); | |
463 Type::Initialize(compile); | |
464 _compile->set_scratch_buffer_blob(NULL); | |
465 _compile->begin_method(); | |
466 } | |
467 CompileWrapper::~CompileWrapper() { | |
468 _compile->end_method(); | |
469 if (_compile->scratch_buffer_blob() != NULL) | |
470 BufferBlob::free(_compile->scratch_buffer_blob()); | |
471 _compile->env()->set_compiler_data(NULL); | |
472 } | |
473 | |
474 | |
475 //----------------------------print_compile_messages--------------------------- | |
476 void Compile::print_compile_messages() { | |
477 #ifndef PRODUCT | |
478 // Check if recompiling | |
479 if (_subsume_loads == false && PrintOpto) { | |
480 // Recompiling without allowing machine instructions to subsume loads | |
481 tty->print_cr("*********************************************************"); | |
482 tty->print_cr("** Bailout: Recompile without subsuming loads **"); | |
483 tty->print_cr("*********************************************************"); | |
484 } | |
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485 if (_do_escape_analysis != DoEscapeAnalysis && PrintOpto) { |
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486 // Recompiling without escape analysis |
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487 tty->print_cr("*********************************************************"); |
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488 tty->print_cr("** Bailout: Recompile without escape analysis **"); |
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489 tty->print_cr("*********************************************************"); |
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490 } |
10278 | 491 if (_eliminate_boxing != EliminateAutoBox && PrintOpto) { |
492 // Recompiling without boxing elimination | |
493 tty->print_cr("*********************************************************"); | |
494 tty->print_cr("** Bailout: Recompile without boxing elimination **"); | |
495 tty->print_cr("*********************************************************"); | |
496 } | |
0 | 497 if (env()->break_at_compile()) { |
605 | 498 // Open the debugger when compiling this method. |
0 | 499 tty->print("### Breaking when compiling: "); |
500 method()->print_short_name(); | |
501 tty->cr(); | |
502 BREAKPOINT; | |
503 } | |
504 | |
505 if( PrintOpto ) { | |
506 if (is_osr_compilation()) { | |
507 tty->print("[OSR]%3d", _compile_id); | |
508 } else { | |
509 tty->print("%3d", _compile_id); | |
510 } | |
511 } | |
512 #endif | |
513 } | |
514 | |
515 | |
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516 //-----------------------init_scratch_buffer_blob------------------------------ |
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517 // Construct a temporary BufferBlob and cache it for this compile. |
2008 | 518 void Compile::init_scratch_buffer_blob(int const_size) { |
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519 // If there is already a scratch buffer blob allocated and the |
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520 // constant section is big enough, use it. Otherwise free the |
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521 // current and allocate a new one. |
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522 BufferBlob* blob = scratch_buffer_blob(); |
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523 if ((blob != NULL) && (const_size <= _scratch_const_size)) { |
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524 // Use the current blob. |
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525 } else { |
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526 if (blob != NULL) { |
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527 BufferBlob::free(blob); |
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528 } |
0 | 529 |
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530 ResourceMark rm; |
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531 _scratch_const_size = const_size; |
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532 int size = (MAX_inst_size + MAX_stubs_size + _scratch_const_size); |
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533 blob = BufferBlob::create("Compile::scratch_buffer", size); |
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534 // Record the buffer blob for next time. |
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535 set_scratch_buffer_blob(blob); |
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536 // Have we run out of code space? |
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537 if (scratch_buffer_blob() == NULL) { |
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538 // Let CompilerBroker disable further compilations. |
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539 record_failure("Not enough space for scratch buffer in CodeCache"); |
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540 return; |
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541 } |
163 | 542 } |
0 | 543 |
544 // Initialize the relocation buffers | |
1748 | 545 relocInfo* locs_buf = (relocInfo*) blob->content_end() - MAX_locs_size; |
0 | 546 set_scratch_locs_memory(locs_buf); |
547 } | |
548 | |
549 | |
550 //-----------------------scratch_emit_size------------------------------------- | |
551 // Helper function that computes size by emitting code | |
552 uint Compile::scratch_emit_size(const Node* n) { | |
2008 | 553 // Start scratch_emit_size section. |
554 set_in_scratch_emit_size(true); | |
555 | |
0 | 556 // Emit into a trash buffer and count bytes emitted. |
557 // This is a pretty expensive way to compute a size, | |
558 // but it works well enough if seldom used. | |
559 // All common fixed-size instructions are given a size | |
560 // method by the AD file. | |
561 // Note that the scratch buffer blob and locs memory are | |
562 // allocated at the beginning of the compile task, and | |
563 // may be shared by several calls to scratch_emit_size. | |
564 // The allocation of the scratch buffer blob is particularly | |
565 // expensive, since it has to grab the code cache lock. | |
566 BufferBlob* blob = this->scratch_buffer_blob(); | |
567 assert(blob != NULL, "Initialize BufferBlob at start"); | |
568 assert(blob->size() > MAX_inst_size, "sanity"); | |
569 relocInfo* locs_buf = scratch_locs_memory(); | |
1748 | 570 address blob_begin = blob->content_begin(); |
0 | 571 address blob_end = (address)locs_buf; |
1748 | 572 assert(blob->content_contains(blob_end), "sanity"); |
0 | 573 CodeBuffer buf(blob_begin, blob_end - blob_begin); |
2008 | 574 buf.initialize_consts_size(_scratch_const_size); |
0 | 575 buf.initialize_stubs_size(MAX_stubs_size); |
576 assert(locs_buf != NULL, "sanity"); | |
2008 | 577 int lsize = MAX_locs_size / 3; |
578 buf.consts()->initialize_shared_locs(&locs_buf[lsize * 0], lsize); | |
579 buf.insts()->initialize_shared_locs( &locs_buf[lsize * 1], lsize); | |
580 buf.stubs()->initialize_shared_locs( &locs_buf[lsize * 2], lsize); | |
581 | |
582 // Do the emission. | |
3839 | 583 |
584 Label fakeL; // Fake label for branch instructions. | |
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585 Label* saveL = NULL; |
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586 uint save_bnum = 0; |
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587 bool is_branch = n->is_MachBranch(); |
3839 | 588 if (is_branch) { |
589 MacroAssembler masm(&buf); | |
590 masm.bind(fakeL); | |
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591 n->as_MachBranch()->save_label(&saveL, &save_bnum); |
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592 n->as_MachBranch()->label_set(&fakeL, 0); |
3839 | 593 } |
0 | 594 n->emit(buf, this->regalloc()); |
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595 if (is_branch) // Restore label. |
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596 n->as_MachBranch()->label_set(saveL, save_bnum); |
2008 | 597 |
598 // End scratch_emit_size section. | |
599 set_in_scratch_emit_size(false); | |
600 | |
1748 | 601 return buf.insts_size(); |
0 | 602 } |
603 | |
604 | |
605 // ============================================================================ | |
606 //------------------------------Compile standard------------------------------- | |
607 debug_only( int Compile::_debug_idx = 100000; ) | |
608 | |
609 // Compile a method. entry_bci is -1 for normal compilations and indicates | |
610 // the continuation bci for on stack replacement. | |
611 | |
612 | |
10278 | 613 Compile::Compile( ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, int osr_bci, |
614 bool subsume_loads, bool do_escape_analysis, bool eliminate_boxing ) | |
0 | 615 : Phase(Compiler), |
616 _env(ci_env), | |
617 _log(ci_env->log()), | |
618 _compile_id(ci_env->compile_id()), | |
619 _save_argument_registers(false), | |
620 _stub_name(NULL), | |
621 _stub_function(NULL), | |
622 _stub_entry_point(NULL), | |
623 _method(target), | |
624 _entry_bci(osr_bci), | |
625 _initial_gvn(NULL), | |
626 _for_igvn(NULL), | |
627 _warm_calls(NULL), | |
628 _subsume_loads(subsume_loads), | |
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629 _do_escape_analysis(do_escape_analysis), |
10278 | 630 _eliminate_boxing(eliminate_boxing), |
0 | 631 _failure_reason(NULL), |
632 _code_buffer("Compile::Fill_buffer"), | |
633 _orig_pc_slot(0), | |
634 _orig_pc_slot_offset_in_bytes(0), | |
1265 | 635 _has_method_handle_invokes(false), |
2008 | 636 _mach_constant_base_node(NULL), |
0 | 637 _node_bundling_limit(0), |
638 _node_bundling_base(NULL), | |
859
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639 _java_calls(0), |
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640 _inner_loops(0), |
2008 | 641 _scratch_const_size(-1), |
642 _in_scratch_emit_size(false), | |
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643 _dead_node_list(comp_arena()), |
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644 _dead_node_count(0), |
0 | 645 #ifndef PRODUCT |
646 _trace_opto_output(TraceOptoOutput || method()->has_option("TraceOptoOutput")), | |
647 _printer(IdealGraphPrinter::printer()), | |
648 #endif | |
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649 _congraph(NULL), |
7473 | 650 _late_inlines(comp_arena(), 2, 0, NULL), |
651 _string_late_inlines(comp_arena(), 2, 0, NULL), | |
10278 | 652 _boxing_late_inlines(comp_arena(), 2, 0, NULL), |
7473 | 653 _late_inlines_pos(0), |
654 _number_of_mh_late_inlines(0), | |
655 _inlining_progress(false), | |
656 _inlining_incrementally(false), | |
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657 _print_inlining_list(NULL), |
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658 _print_inlining_idx(0), |
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659 _preserve_jvm_state(0) { |
0 | 660 C = this; |
661 | |
662 CompileWrapper cw(this); | |
663 #ifndef PRODUCT | |
664 if (TimeCompiler2) { | |
665 tty->print(" "); | |
666 target->holder()->name()->print(); | |
667 tty->print("."); | |
668 target->print_short_name(); | |
669 tty->print(" "); | |
670 } | |
671 TraceTime t1("Total compilation time", &_t_totalCompilation, TimeCompiler, TimeCompiler2); | |
672 TraceTime t2(NULL, &_t_methodCompilation, TimeCompiler, false); | |
100
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673 bool print_opto_assembly = PrintOptoAssembly || _method->has_option("PrintOptoAssembly"); |
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674 if (!print_opto_assembly) { |
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675 bool print_assembly = (PrintAssembly || _method->should_print_assembly()); |
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676 if (print_assembly && !Disassembler::can_decode()) { |
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677 tty->print_cr("PrintAssembly request changed to PrintOptoAssembly"); |
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678 print_opto_assembly = true; |
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679 } |
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680 } |
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681 set_print_assembly(print_opto_assembly); |
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682 set_parsed_irreducible_loop(false); |
0 | 683 #endif |
12295 | 684 set_print_inlining(PrintInlining || method()->has_option("PrintInlining") NOT_PRODUCT( || PrintOptoInlining)); |
685 set_print_intrinsics(PrintIntrinsics || method()->has_option("PrintIntrinsics")); | |
0 | 686 |
687 if (ProfileTraps) { | |
688 // Make sure the method being compiled gets its own MDO, | |
689 // so we can at least track the decompile_count(). | |
2007
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690 method()->ensure_method_data(); |
0 | 691 } |
692 | |
693 Init(::AliasLevel); | |
694 | |
695 | |
696 print_compile_messages(); | |
697 | |
698 if (UseOldInlining || PrintCompilation NOT_PRODUCT( || PrintOpto) ) | |
699 _ilt = InlineTree::build_inline_tree_root(); | |
700 else | |
701 _ilt = NULL; | |
702 | |
703 // Even if NO memory addresses are used, MergeMem nodes must have at least 1 slice | |
704 assert(num_alias_types() >= AliasIdxRaw, ""); | |
705 | |
706 #define MINIMUM_NODE_HASH 1023 | |
707 // Node list that Iterative GVN will start with | |
708 Unique_Node_List for_igvn(comp_arena()); | |
709 set_for_igvn(&for_igvn); | |
710 | |
711 // GVN that will be run immediately on new nodes | |
712 uint estimated_size = method()->code_size()*4+64; | |
713 estimated_size = (estimated_size < MINIMUM_NODE_HASH ? MINIMUM_NODE_HASH : estimated_size); | |
714 PhaseGVN gvn(node_arena(), estimated_size); | |
715 set_initial_gvn(&gvn); | |
716 | |
12295 | 717 if (print_inlining() || print_intrinsics()) { |
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718 _print_inlining_list = new (comp_arena())GrowableArray<PrintInliningBuffer>(comp_arena(), 1, 1, PrintInliningBuffer()); |
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719 } |
0 | 720 { // Scope for timing the parser |
721 TracePhase t3("parse", &_t_parser, true); | |
722 | |
723 // Put top into the hash table ASAP. | |
724 initial_gvn()->transform_no_reclaim(top()); | |
725 | |
726 // Set up tf(), start(), and find a CallGenerator. | |
3249
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727 CallGenerator* cg = NULL; |
0 | 728 if (is_osr_compilation()) { |
729 const TypeTuple *domain = StartOSRNode::osr_domain(); | |
730 const TypeTuple *range = TypeTuple::make_range(method()->signature()); | |
731 init_tf(TypeFunc::make(domain, range)); | |
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732 StartNode* s = new (this) StartOSRNode(root(), domain); |
0 | 733 initial_gvn()->set_type_bottom(s); |
734 init_start(s); | |
735 cg = CallGenerator::for_osr(method(), entry_bci()); | |
736 } else { | |
737 // Normal case. | |
738 init_tf(TypeFunc::make(method())); | |
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739 StartNode* s = new (this) StartNode(root(), tf()->domain()); |
0 | 740 initial_gvn()->set_type_bottom(s); |
741 init_start(s); | |
3249
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742 if (method()->intrinsic_id() == vmIntrinsics::_Reference_get && UseG1GC) { |
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743 // With java.lang.ref.reference.get() we must go through the |
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744 // intrinsic when G1 is enabled - even when get() is the root |
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745 // method of the compile - so that, if necessary, the value in |
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746 // the referent field of the reference object gets recorded by |
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747 // the pre-barrier code. |
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748 // Specifically, if G1 is enabled, the value in the referent |
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|
749 // field is recorded by the G1 SATB pre barrier. This will |
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750 // result in the referent being marked live and the reference |
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751 // object removed from the list of discovered references during |
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752 // reference processing. |
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753 cg = find_intrinsic(method(), false); |
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|
754 } |
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|
755 if (cg == NULL) { |
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756 float past_uses = method()->interpreter_invocation_count(); |
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757 float expected_uses = past_uses; |
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758 cg = CallGenerator::for_inline(method(), expected_uses); |
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759 } |
0 | 760 } |
761 if (failing()) return; | |
762 if (cg == NULL) { | |
763 record_method_not_compilable_all_tiers("cannot parse method"); | |
764 return; | |
765 } | |
766 JVMState* jvms = build_start_state(start(), tf()); | |
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767 if ((jvms = cg->generate(jvms, NULL)) == NULL) { |
0 | 768 record_method_not_compilable("method parse failed"); |
769 return; | |
770 } | |
771 GraphKit kit(jvms); | |
772 | |
773 if (!kit.stopped()) { | |
774 // Accept return values, and transfer control we know not where. | |
775 // This is done by a special, unique ReturnNode bound to root. | |
776 return_values(kit.jvms()); | |
777 } | |
778 | |
779 if (kit.has_exceptions()) { | |
780 // Any exceptions that escape from this call must be rethrown | |
781 // to whatever caller is dynamically above us on the stack. | |
782 // This is done by a special, unique RethrowNode bound to root. | |
783 rethrow_exceptions(kit.transfer_exceptions_into_jvms()); | |
784 } | |
785 | |
7473 | 786 assert(IncrementalInline || (_late_inlines.length() == 0 && !has_mh_late_inlines()), "incremental inlining is off"); |
787 | |
788 if (_late_inlines.length() == 0 && !has_mh_late_inlines() && !failing() && has_stringbuilder()) { | |
789 inline_string_calls(true); | |
1080
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790 } |
7473 | 791 |
792 if (failing()) return; | |
1080
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|
793 |
10405 | 794 print_method(PHASE_BEFORE_REMOVEUSELESS, 3); |
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795 |
0 | 796 // Remove clutter produced by parsing. |
797 if (!failing()) { | |
798 ResourceMark rm; | |
799 PhaseRemoveUseless pru(initial_gvn(), &for_igvn); | |
800 } | |
801 } | |
802 | |
803 // Note: Large methods are capped off in do_one_bytecode(). | |
804 if (failing()) return; | |
805 | |
806 // After parsing, node notes are no longer automagic. | |
807 // They must be propagated by register_new_node_with_optimizer(), | |
808 // clone(), or the like. | |
809 set_default_node_notes(NULL); | |
810 | |
811 for (;;) { | |
812 int successes = Inline_Warm(); | |
813 if (failing()) return; | |
814 if (successes == 0) break; | |
815 } | |
816 | |
817 // Drain the list. | |
818 Finish_Warm(); | |
819 #ifndef PRODUCT | |
820 if (_printer) { | |
821 _printer->print_inlining(this); | |
822 } | |
823 #endif | |
824 | |
825 if (failing()) return; | |
826 NOT_PRODUCT( verify_graph_edges(); ) | |
827 | |
828 // Now optimize | |
829 Optimize(); | |
830 if (failing()) return; | |
831 NOT_PRODUCT( verify_graph_edges(); ) | |
832 | |
833 #ifndef PRODUCT | |
834 if (PrintIdeal) { | |
835 ttyLocker ttyl; // keep the following output all in one block | |
836 // This output goes directly to the tty, not the compiler log. | |
837 // To enable tools to match it up with the compilation activity, | |
838 // be sure to tag this tty output with the compile ID. | |
839 if (xtty != NULL) { | |
840 xtty->head("ideal compile_id='%d'%s", compile_id(), | |
841 is_osr_compilation() ? " compile_kind='osr'" : | |
842 ""); | |
843 } | |
844 root()->dump(9999); | |
845 if (xtty != NULL) { | |
846 xtty->tail("ideal"); | |
847 } | |
848 } | |
849 #endif | |
850 | |
851 // Now that we know the size of all the monitors we can add a fixed slot | |
852 // for the original deopt pc. | |
853 | |
854 _orig_pc_slot = fixed_slots(); | |
855 int next_slot = _orig_pc_slot + (sizeof(address) / VMRegImpl::stack_slot_size); | |
856 set_fixed_slots(next_slot); | |
857 | |
858 // Now generate code | |
859 Code_Gen(); | |
860 if (failing()) return; | |
861 | |
862 // Check if we want to skip execution of all compiled code. | |
863 { | |
864 #ifndef PRODUCT | |
865 if (OptoNoExecute) { | |
866 record_method_not_compilable("+OptoNoExecute"); // Flag as failed | |
867 return; | |
868 } | |
869 TracePhase t2("install_code", &_t_registerMethod, TimeCompiler); | |
870 #endif | |
871 | |
872 if (is_osr_compilation()) { | |
873 _code_offsets.set_value(CodeOffsets::Verified_Entry, 0); | |
874 _code_offsets.set_value(CodeOffsets::OSR_Entry, _first_block_size); | |
875 } else { | |
876 _code_offsets.set_value(CodeOffsets::Verified_Entry, _first_block_size); | |
877 _code_offsets.set_value(CodeOffsets::OSR_Entry, 0); | |
878 } | |
879 | |
880 env()->register_method(_method, _entry_bci, | |
881 &_code_offsets, | |
882 _orig_pc_slot_offset_in_bytes, | |
883 code_buffer(), | |
884 frame_size_in_words(), _oop_map_set, | |
885 &_handler_table, &_inc_table, | |
886 compiler, | |
887 env()->comp_level(), | |
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888 has_unsafe_access(), |
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889 SharedRuntime::is_wide_vector(max_vector_size()) |
0 | 890 ); |
6843 | 891 |
892 if (log() != NULL) // Print code cache state into compiler log | |
893 log()->code_cache_state(); | |
0 | 894 } |
895 } | |
896 | |
897 //------------------------------Compile---------------------------------------- | |
898 // Compile a runtime stub | |
899 Compile::Compile( ciEnv* ci_env, | |
900 TypeFunc_generator generator, | |
901 address stub_function, | |
902 const char *stub_name, | |
903 int is_fancy_jump, | |
904 bool pass_tls, | |
905 bool save_arg_registers, | |
906 bool return_pc ) | |
907 : Phase(Compiler), | |
908 _env(ci_env), | |
909 _log(ci_env->log()), | |
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910 _compile_id(0), |
0 | 911 _save_argument_registers(save_arg_registers), |
912 _method(NULL), | |
913 _stub_name(stub_name), | |
914 _stub_function(stub_function), | |
915 _stub_entry_point(NULL), | |
916 _entry_bci(InvocationEntryBci), | |
917 _initial_gvn(NULL), | |
918 _for_igvn(NULL), | |
919 _warm_calls(NULL), | |
920 _orig_pc_slot(0), | |
921 _orig_pc_slot_offset_in_bytes(0), | |
922 _subsume_loads(true), | |
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923 _do_escape_analysis(false), |
10278 | 924 _eliminate_boxing(false), |
0 | 925 _failure_reason(NULL), |
926 _code_buffer("Compile::Fill_buffer"), | |
1265 | 927 _has_method_handle_invokes(false), |
2008 | 928 _mach_constant_base_node(NULL), |
0 | 929 _node_bundling_limit(0), |
930 _node_bundling_base(NULL), | |
859
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931 _java_calls(0), |
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932 _inner_loops(0), |
0 | 933 #ifndef PRODUCT |
934 _trace_opto_output(TraceOptoOutput), | |
935 _printer(NULL), | |
936 #endif | |
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937 _dead_node_list(comp_arena()), |
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938 _dead_node_count(0), |
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939 _congraph(NULL), |
7473 | 940 _number_of_mh_late_inlines(0), |
941 _inlining_progress(false), | |
942 _inlining_incrementally(false), | |
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943 _print_inlining_list(NULL), |
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944 _print_inlining_idx(0), |
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945 _preserve_jvm_state(0) { |
0 | 946 C = this; |
947 | |
948 #ifndef PRODUCT | |
949 TraceTime t1(NULL, &_t_totalCompilation, TimeCompiler, false); | |
950 TraceTime t2(NULL, &_t_stubCompilation, TimeCompiler, false); | |
951 set_print_assembly(PrintFrameConverterAssembly); | |
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952 set_parsed_irreducible_loop(false); |
0 | 953 #endif |
954 CompileWrapper cw(this); | |
955 Init(/*AliasLevel=*/ 0); | |
956 init_tf((*generator)()); | |
957 | |
958 { | |
959 // The following is a dummy for the sake of GraphKit::gen_stub | |
960 Unique_Node_List for_igvn(comp_arena()); | |
961 set_for_igvn(&for_igvn); // not used, but some GraphKit guys push on this | |
962 PhaseGVN gvn(Thread::current()->resource_area(),255); | |
963 set_initial_gvn(&gvn); // not significant, but GraphKit guys use it pervasively | |
964 gvn.transform_no_reclaim(top()); | |
965 | |
966 GraphKit kit; | |
967 kit.gen_stub(stub_function, stub_name, is_fancy_jump, pass_tls, return_pc); | |
968 } | |
969 | |
970 NOT_PRODUCT( verify_graph_edges(); ) | |
971 Code_Gen(); | |
972 if (failing()) return; | |
973 | |
974 | |
975 // Entry point will be accessed using compile->stub_entry_point(); | |
976 if (code_buffer() == NULL) { | |
977 Matcher::soft_match_failure(); | |
978 } else { | |
979 if (PrintAssembly && (WizardMode || Verbose)) | |
980 tty->print_cr("### Stub::%s", stub_name); | |
981 | |
982 if (!failing()) { | |
983 assert(_fixed_slots == 0, "no fixed slots used for runtime stubs"); | |
984 | |
985 // Make the NMethod | |
986 // For now we mark the frame as never safe for profile stackwalking | |
987 RuntimeStub *rs = RuntimeStub::new_runtime_stub(stub_name, | |
988 code_buffer(), | |
989 CodeOffsets::frame_never_safe, | |
990 // _code_offsets.value(CodeOffsets::Frame_Complete), | |
991 frame_size_in_words(), | |
992 _oop_map_set, | |
993 save_arg_registers); | |
994 assert(rs != NULL && rs->is_runtime_stub(), "sanity check"); | |
995 | |
996 _stub_entry_point = rs->entry_point(); | |
997 } | |
998 } | |
999 } | |
1000 | |
1001 //------------------------------Init------------------------------------------- | |
1002 // Prepare for a single compilation | |
1003 void Compile::Init(int aliaslevel) { | |
1004 _unique = 0; | |
1005 _regalloc = NULL; | |
1006 | |
1007 _tf = NULL; // filled in later | |
1008 _top = NULL; // cached later | |
1009 _matcher = NULL; // filled in later | |
1010 _cfg = NULL; // filled in later | |
1011 | |
1012 set_24_bit_selection_and_mode(Use24BitFP, false); | |
1013 | |
1014 _node_note_array = NULL; | |
1015 _default_node_notes = NULL; | |
1016 | |
1017 _immutable_memory = NULL; // filled in at first inquiry | |
1018 | |
1019 // Globally visible Nodes | |
1020 // First set TOP to NULL to give safe behavior during creation of RootNode | |
1021 set_cached_top_node(NULL); | |
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1022 set_root(new (this) RootNode()); |
0 | 1023 // Now that you have a Root to point to, create the real TOP |
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1024 set_cached_top_node( new (this) ConNode(Type::TOP) ); |
0 | 1025 set_recent_alloc(NULL, NULL); |
1026 | |
1027 // Create Debug Information Recorder to record scopes, oopmaps, etc. | |
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1028 env()->set_oop_recorder(new OopRecorder(env()->arena())); |
0 | 1029 env()->set_debug_info(new DebugInformationRecorder(env()->oop_recorder())); |
1030 env()->set_dependencies(new Dependencies(env())); | |
1031 | |
1032 _fixed_slots = 0; | |
1033 set_has_split_ifs(false); | |
1034 set_has_loops(has_method() && method()->has_loops()); // first approximation | |
1080
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1035 set_has_stringbuilder(false); |
10278 | 1036 set_has_boxed_value(false); |
0 | 1037 _trap_can_recompile = false; // no traps emitted yet |
1038 _major_progress = true; // start out assuming good things will happen | |
1039 set_has_unsafe_access(false); | |
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1040 set_max_vector_size(0); |
0 | 1041 Copy::zero_to_bytes(_trap_hist, sizeof(_trap_hist)); |
1042 set_decompile_count(0); | |
1043 | |
418 | 1044 set_do_freq_based_layout(BlockLayoutByFrequency || method_has_option("BlockLayoutByFrequency")); |
1783 | 1045 set_num_loop_opts(LoopOptsCount); |
1046 set_do_inlining(Inline); | |
1047 set_max_inline_size(MaxInlineSize); | |
1048 set_freq_inline_size(FreqInlineSize); | |
1049 set_do_scheduling(OptoScheduling); | |
1050 set_do_count_invocations(false); | |
1051 set_do_method_data_update(false); | |
0 | 1052 |
1053 if (debug_info()->recording_non_safepoints()) { | |
1054 set_node_note_array(new(comp_arena()) GrowableArray<Node_Notes*> | |
1055 (comp_arena(), 8, 0, NULL)); | |
1056 set_default_node_notes(Node_Notes::make(this)); | |
1057 } | |
1058 | |
1059 // // -- Initialize types before each compile -- | |
1060 // // Update cached type information | |
1061 // if( _method && _method->constants() ) | |
1062 // Type::update_loaded_types(_method, _method->constants()); | |
1063 | |
1064 // Init alias_type map. | |
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1065 if (!_do_escape_analysis && aliaslevel == 3) |
0 | 1066 aliaslevel = 2; // No unique types without escape analysis |
1067 _AliasLevel = aliaslevel; | |
1068 const int grow_ats = 16; | |
1069 _max_alias_types = grow_ats; | |
1070 _alias_types = NEW_ARENA_ARRAY(comp_arena(), AliasType*, grow_ats); | |
1071 AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, grow_ats); | |
1072 Copy::zero_to_bytes(ats, sizeof(AliasType)*grow_ats); | |
1073 { | |
1074 for (int i = 0; i < grow_ats; i++) _alias_types[i] = &ats[i]; | |
1075 } | |
1076 // Initialize the first few types. | |
1077 _alias_types[AliasIdxTop]->Init(AliasIdxTop, NULL); | |
1078 _alias_types[AliasIdxBot]->Init(AliasIdxBot, TypePtr::BOTTOM); | |
1079 _alias_types[AliasIdxRaw]->Init(AliasIdxRaw, TypeRawPtr::BOTTOM); | |
1080 _num_alias_types = AliasIdxRaw+1; | |
1081 // Zero out the alias type cache. | |
1082 Copy::zero_to_bytes(_alias_cache, sizeof(_alias_cache)); | |
1083 // A NULL adr_type hits in the cache right away. Preload the right answer. | |
1084 probe_alias_cache(NULL)->_index = AliasIdxTop; | |
1085 | |
1086 _intrinsics = NULL; | |
1685 | 1087 _macro_nodes = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); |
1088 _predicate_opaqs = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); | |
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1089 _expensive_nodes = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); |
0 | 1090 register_library_intrinsics(); |
1091 } | |
1092 | |
1093 //---------------------------init_start---------------------------------------- | |
1094 // Install the StartNode on this compile object. | |
1095 void Compile::init_start(StartNode* s) { | |
1096 if (failing()) | |
1097 return; // already failing | |
1098 assert(s == start(), ""); | |
1099 } | |
1100 | |
1101 StartNode* Compile::start() const { | |
1102 assert(!failing(), ""); | |
1103 for (DUIterator_Fast imax, i = root()->fast_outs(imax); i < imax; i++) { | |
1104 Node* start = root()->fast_out(i); | |
1105 if( start->is_Start() ) | |
1106 return start->as_Start(); | |
1107 } | |
1108 ShouldNotReachHere(); | |
1109 return NULL; | |
1110 } | |
1111 | |
1112 //-------------------------------immutable_memory------------------------------------- | |
1113 // Access immutable memory | |
1114 Node* Compile::immutable_memory() { | |
1115 if (_immutable_memory != NULL) { | |
1116 return _immutable_memory; | |
1117 } | |
1118 StartNode* s = start(); | |
1119 for (DUIterator_Fast imax, i = s->fast_outs(imax); true; i++) { | |
1120 Node *p = s->fast_out(i); | |
1121 if (p != s && p->as_Proj()->_con == TypeFunc::Memory) { | |
1122 _immutable_memory = p; | |
1123 return _immutable_memory; | |
1124 } | |
1125 } | |
1126 ShouldNotReachHere(); | |
1127 return NULL; | |
1128 } | |
1129 | |
1130 //----------------------set_cached_top_node------------------------------------ | |
1131 // Install the cached top node, and make sure Node::is_top works correctly. | |
1132 void Compile::set_cached_top_node(Node* tn) { | |
1133 if (tn != NULL) verify_top(tn); | |
1134 Node* old_top = _top; | |
1135 _top = tn; | |
1136 // Calling Node::setup_is_top allows the nodes the chance to adjust | |
1137 // their _out arrays. | |
1138 if (_top != NULL) _top->setup_is_top(); | |
1139 if (old_top != NULL) old_top->setup_is_top(); | |
1140 assert(_top == NULL || top()->is_top(), ""); | |
1141 } | |
1142 | |
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1143 #ifdef ASSERT |
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1144 uint Compile::count_live_nodes_by_graph_walk() { |
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1145 Unique_Node_List useful(comp_arena()); |
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1146 // Get useful node list by walking the graph. |
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1147 identify_useful_nodes(useful); |
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1148 return useful.size(); |
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1149 } |
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1150 |
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1151 void Compile::print_missing_nodes() { |
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1152 |
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1153 // Return if CompileLog is NULL and PrintIdealNodeCount is false. |
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1154 if ((_log == NULL) && (! PrintIdealNodeCount)) { |
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1155 return; |
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1156 } |
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1157 |
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1158 // This is an expensive function. It is executed only when the user |
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1159 // specifies VerifyIdealNodeCount option or otherwise knows the |
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1160 // additional work that needs to be done to identify reachable nodes |
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1161 // by walking the flow graph and find the missing ones using |
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1162 // _dead_node_list. |
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1163 |
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1164 Unique_Node_List useful(comp_arena()); |
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1165 // Get useful node list by walking the graph. |
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1166 identify_useful_nodes(useful); |
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1167 |
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1168 uint l_nodes = C->live_nodes(); |
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1169 uint l_nodes_by_walk = useful.size(); |
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1170 |
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1171 if (l_nodes != l_nodes_by_walk) { |
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1172 if (_log != NULL) { |
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1173 _log->begin_head("mismatched_nodes count='%d'", abs((int) (l_nodes - l_nodes_by_walk))); |
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1174 _log->stamp(); |
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1175 _log->end_head(); |
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1176 } |
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1177 VectorSet& useful_member_set = useful.member_set(); |
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1178 int last_idx = l_nodes_by_walk; |
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1179 for (int i = 0; i < last_idx; i++) { |
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1180 if (useful_member_set.test(i)) { |
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1181 if (_dead_node_list.test(i)) { |
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1182 if (_log != NULL) { |
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1183 _log->elem("mismatched_node_info node_idx='%d' type='both live and dead'", i); |
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1184 } |
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1185 if (PrintIdealNodeCount) { |
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1186 // Print the log message to tty |
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1187 tty->print_cr("mismatched_node idx='%d' both live and dead'", i); |
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1188 useful.at(i)->dump(); |
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1189 } |
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1190 } |
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1191 } |
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1192 else if (! _dead_node_list.test(i)) { |
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1193 if (_log != NULL) { |
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1194 _log->elem("mismatched_node_info node_idx='%d' type='neither live nor dead'", i); |
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1195 } |
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1196 if (PrintIdealNodeCount) { |
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1197 // Print the log message to tty |
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1198 tty->print_cr("mismatched_node idx='%d' type='neither live nor dead'", i); |
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1199 } |
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1200 } |
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1201 } |
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1202 if (_log != NULL) { |
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1203 _log->tail("mismatched_nodes"); |
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1204 } |
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1205 } |
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1206 } |
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1207 #endif |
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1208 |
0 | 1209 #ifndef PRODUCT |
1210 void Compile::verify_top(Node* tn) const { | |
1211 if (tn != NULL) { | |
1212 assert(tn->is_Con(), "top node must be a constant"); | |
1213 assert(((ConNode*)tn)->type() == Type::TOP, "top node must have correct type"); | |
1214 assert(tn->in(0) != NULL, "must have live top node"); | |
1215 } | |
1216 } | |
1217 #endif | |
1218 | |
1219 | |
1220 ///-------------------Managing Per-Node Debug & Profile Info------------------- | |
1221 | |
1222 void Compile::grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by) { | |
1223 guarantee(arr != NULL, ""); | |
1224 int num_blocks = arr->length(); | |
1225 if (grow_by < num_blocks) grow_by = num_blocks; | |
1226 int num_notes = grow_by * _node_notes_block_size; | |
1227 Node_Notes* notes = NEW_ARENA_ARRAY(node_arena(), Node_Notes, num_notes); | |
1228 Copy::zero_to_bytes(notes, num_notes * sizeof(Node_Notes)); | |
1229 while (num_notes > 0) { | |
1230 arr->append(notes); | |
1231 notes += _node_notes_block_size; | |
1232 num_notes -= _node_notes_block_size; | |
1233 } | |
1234 assert(num_notes == 0, "exact multiple, please"); | |
1235 } | |
1236 | |
1237 bool Compile::copy_node_notes_to(Node* dest, Node* source) { | |
1238 if (source == NULL || dest == NULL) return false; | |
1239 | |
1240 if (dest->is_Con()) | |
1241 return false; // Do not push debug info onto constants. | |
1242 | |
1243 #ifdef ASSERT | |
1244 // Leave a bread crumb trail pointing to the original node: | |
1245 if (dest != NULL && dest != source && dest->debug_orig() == NULL) { | |
1246 dest->set_debug_orig(source); | |
1247 } | |
1248 #endif | |
1249 | |
1250 if (node_note_array() == NULL) | |
1251 return false; // Not collecting any notes now. | |
1252 | |
1253 // This is a copy onto a pre-existing node, which may already have notes. | |
1254 // If both nodes have notes, do not overwrite any pre-existing notes. | |
1255 Node_Notes* source_notes = node_notes_at(source->_idx); | |
1256 if (source_notes == NULL || source_notes->is_clear()) return false; | |
1257 Node_Notes* dest_notes = node_notes_at(dest->_idx); | |
1258 if (dest_notes == NULL || dest_notes->is_clear()) { | |
1259 return set_node_notes_at(dest->_idx, source_notes); | |
1260 } | |
1261 | |
1262 Node_Notes merged_notes = (*source_notes); | |
1263 // The order of operations here ensures that dest notes will win... | |
1264 merged_notes.update_from(dest_notes); | |
1265 return set_node_notes_at(dest->_idx, &merged_notes); | |
1266 } | |
1267 | |
1268 | |
1269 //--------------------------allow_range_check_smearing------------------------- | |
1270 // Gating condition for coalescing similar range checks. | |
1271 // Sometimes we try 'speculatively' replacing a series of a range checks by a | |
1272 // single covering check that is at least as strong as any of them. | |
1273 // If the optimization succeeds, the simplified (strengthened) range check | |
1274 // will always succeed. If it fails, we will deopt, and then give up | |
1275 // on the optimization. | |
1276 bool Compile::allow_range_check_smearing() const { | |
1277 // If this method has already thrown a range-check, | |
1278 // assume it was because we already tried range smearing | |
1279 // and it failed. | |
1280 uint already_trapped = trap_count(Deoptimization::Reason_range_check); | |
1281 return !already_trapped; | |
1282 } | |
1283 | |
1284 | |
1285 //------------------------------flatten_alias_type----------------------------- | |
1286 const TypePtr *Compile::flatten_alias_type( const TypePtr *tj ) const { | |
1287 int offset = tj->offset(); | |
1288 TypePtr::PTR ptr = tj->ptr(); | |
1289 | |
247 | 1290 // Known instance (scalarizable allocation) alias only with itself. |
1291 bool is_known_inst = tj->isa_oopptr() != NULL && | |
1292 tj->is_oopptr()->is_known_instance(); | |
1293 | |
0 | 1294 // Process weird unsafe references. |
1295 if (offset == Type::OffsetBot && (tj->isa_instptr() /*|| tj->isa_klassptr()*/)) { | |
1296 assert(InlineUnsafeOps, "indeterminate pointers come only from unsafe ops"); | |
247 | 1297 assert(!is_known_inst, "scalarizable allocation should not have unsafe references"); |
0 | 1298 tj = TypeOopPtr::BOTTOM; |
1299 ptr = tj->ptr(); | |
1300 offset = tj->offset(); | |
1301 } | |
1302 | |
1303 // Array pointers need some flattening | |
1304 const TypeAryPtr *ta = tj->isa_aryptr(); | |
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1305 if (ta && ta->is_stable()) { |
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1307 tj = ta = ta->cast_to_stable(false); |
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1308 } |
247 | 1309 if( ta && is_known_inst ) { |
1310 if ( offset != Type::OffsetBot && | |
1311 offset > arrayOopDesc::length_offset_in_bytes() ) { | |
1312 offset = Type::OffsetBot; // Flatten constant access into array body only | |
1313 tj = ta = TypeAryPtr::make(ptr, ta->ary(), ta->klass(), true, offset, ta->instance_id()); | |
1314 } | |
1315 } else if( ta && _AliasLevel >= 2 ) { | |
0 | 1316 // For arrays indexed by constant indices, we flatten the alias |
1317 // space to include all of the array body. Only the header, klass | |
1318 // and array length can be accessed un-aliased. | |
1319 if( offset != Type::OffsetBot ) { | |
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1320 if( ta->const_oop() ) { // MethodData* or Method* |
0 | 1321 offset = Type::OffsetBot; // Flatten constant access into array body |
247 | 1322 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),ta->ary(),ta->klass(),false,offset); |
0 | 1323 } else if( offset == arrayOopDesc::length_offset_in_bytes() ) { |
1324 // range is OK as-is. | |
1325 tj = ta = TypeAryPtr::RANGE; | |
1326 } else if( offset == oopDesc::klass_offset_in_bytes() ) { | |
1327 tj = TypeInstPtr::KLASS; // all klass loads look alike | |
1328 ta = TypeAryPtr::RANGE; // generic ignored junk | |
1329 ptr = TypePtr::BotPTR; | |
1330 } else if( offset == oopDesc::mark_offset_in_bytes() ) { | |
1331 tj = TypeInstPtr::MARK; | |
1332 ta = TypeAryPtr::RANGE; // generic ignored junk | |
1333 ptr = TypePtr::BotPTR; | |
1334 } else { // Random constant offset into array body | |
1335 offset = Type::OffsetBot; // Flatten constant access into array body | |
247 | 1336 tj = ta = TypeAryPtr::make(ptr,ta->ary(),ta->klass(),false,offset); |
0 | 1337 } |
1338 } | |
1339 // Arrays of fixed size alias with arrays of unknown size. | |
1340 if (ta->size() != TypeInt::POS) { | |
1341 const TypeAry *tary = TypeAry::make(ta->elem(), TypeInt::POS); | |
247 | 1342 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,ta->klass(),false,offset); |
0 | 1343 } |
1344 // Arrays of known objects become arrays of unknown objects. | |
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1345 if (ta->elem()->isa_narrowoop() && ta->elem() != TypeNarrowOop::BOTTOM) { |
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1346 const TypeAry *tary = TypeAry::make(TypeNarrowOop::BOTTOM, ta->size()); |
247 | 1347 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset); |
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1348 } |
0 | 1349 if (ta->elem()->isa_oopptr() && ta->elem() != TypeInstPtr::BOTTOM) { |
1350 const TypeAry *tary = TypeAry::make(TypeInstPtr::BOTTOM, ta->size()); | |
247 | 1351 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset); |
0 | 1352 } |
1353 // Arrays of bytes and of booleans both use 'bastore' and 'baload' so | |
1354 // cannot be distinguished by bytecode alone. | |
1355 if (ta->elem() == TypeInt::BOOL) { | |
1356 const TypeAry *tary = TypeAry::make(TypeInt::BYTE, ta->size()); | |
1357 ciKlass* aklass = ciTypeArrayKlass::make(T_BYTE); | |
247 | 1358 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,aklass,false,offset); |
0 | 1359 } |
1360 // During the 2nd round of IterGVN, NotNull castings are removed. | |
1361 // Make sure the Bottom and NotNull variants alias the same. | |
1362 // Also, make sure exact and non-exact variants alias the same. | |
12966 | 1363 if (ptr == TypePtr::NotNull || ta->klass_is_exact() || ta->speculative() != NULL) { |
3789 | 1364 tj = ta = TypeAryPtr::make(TypePtr::BotPTR,ta->ary(),ta->klass(),false,offset); |
0 | 1365 } |
1366 } | |
1367 | |
1368 // Oop pointers need some flattening | |
1369 const TypeInstPtr *to = tj->isa_instptr(); | |
1370 if( to && _AliasLevel >= 2 && to != TypeOopPtr::BOTTOM ) { | |
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1371 ciInstanceKlass *k = to->klass()->as_instance_klass(); |
0 | 1372 if( ptr == TypePtr::Constant ) { |
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1373 if (to->klass() != ciEnv::current()->Class_klass() || |
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1374 offset < k->size_helper() * wordSize) { |
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1375 // No constant oop pointers (such as Strings); they alias with |
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1376 // unknown strings. |
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1377 assert(!is_known_inst, "not scalarizable allocation"); |
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1378 tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset); |
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1379 } |
247 | 1380 } else if( is_known_inst ) { |
163 | 1381 tj = to; // Keep NotNull and klass_is_exact for instance type |
0 | 1382 } else if( ptr == TypePtr::NotNull || to->klass_is_exact() ) { |
1383 // During the 2nd round of IterGVN, NotNull castings are removed. | |
1384 // Make sure the Bottom and NotNull variants alias the same. | |
1385 // Also, make sure exact and non-exact variants alias the same. | |
247 | 1386 tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset); |
0 | 1387 } |
12966 | 1388 if (to->speculative() != NULL) { |
1389 tj = to = TypeInstPtr::make(to->ptr(),to->klass(),to->klass_is_exact(),to->const_oop(),to->offset(), to->instance_id()); | |
1390 } | |
0 | 1391 // Canonicalize the holder of this field |
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1392 if (offset >= 0 && offset < instanceOopDesc::base_offset_in_bytes()) { |
0 | 1393 // First handle header references such as a LoadKlassNode, even if the |
1394 // object's klass is unloaded at compile time (4965979). | |
247 | 1395 if (!is_known_inst) { // Do it only for non-instance types |
1396 tj = to = TypeInstPtr::make(TypePtr::BotPTR, env()->Object_klass(), false, NULL, offset); | |
1397 } | |
0 | 1398 } else if (offset < 0 || offset >= k->size_helper() * wordSize) { |
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1399 // Static fields are in the space above the normal instance |
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1400 // fields in the java.lang.Class instance. |
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1401 if (to->klass() != ciEnv::current()->Class_klass()) { |
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1402 to = NULL; |
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1403 tj = TypeOopPtr::BOTTOM; |
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1404 offset = tj->offset(); |
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1405 } |
0 | 1406 } else { |
1407 ciInstanceKlass *canonical_holder = k->get_canonical_holder(offset); | |
1408 if (!k->equals(canonical_holder) || tj->offset() != offset) { | |
247 | 1409 if( is_known_inst ) { |
1410 tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, true, NULL, offset, to->instance_id()); | |
1411 } else { | |
1412 tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, false, NULL, offset); | |
1413 } | |
0 | 1414 } |
1415 } | |
1416 } | |
1417 | |
1418 // Klass pointers to object array klasses need some flattening | |
1419 const TypeKlassPtr *tk = tj->isa_klassptr(); | |
1420 if( tk ) { | |
1421 // If we are referencing a field within a Klass, we need | |
1422 // to assume the worst case of an Object. Both exact and | |
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1423 // inexact types must flatten to the same alias class so |
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1424 // use NotNull as the PTR. |
0 | 1425 if ( offset == Type::OffsetBot || (offset >= 0 && (size_t)offset < sizeof(Klass)) ) { |
1426 | |
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1427 tj = tk = TypeKlassPtr::make(TypePtr::NotNull, |
0 | 1428 TypeKlassPtr::OBJECT->klass(), |
1429 offset); | |
1430 } | |
1431 | |
1432 ciKlass* klass = tk->klass(); | |
1433 if( klass->is_obj_array_klass() ) { | |
1434 ciKlass* k = TypeAryPtr::OOPS->klass(); | |
1435 if( !k || !k->is_loaded() ) // Only fails for some -Xcomp runs | |
1436 k = TypeInstPtr::BOTTOM->klass(); | |
1437 tj = tk = TypeKlassPtr::make( TypePtr::NotNull, k, offset ); | |
1438 } | |
1439 | |
1440 // Check for precise loads from the primary supertype array and force them | |
1441 // to the supertype cache alias index. Check for generic array loads from | |
1442 // the primary supertype array and also force them to the supertype cache | |
1443 // alias index. Since the same load can reach both, we need to merge | |
1444 // these 2 disparate memories into the same alias class. Since the | |
1445 // primary supertype array is read-only, there's no chance of confusion | |
1446 // where we bypass an array load and an array store. | |
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1447 int primary_supers_offset = in_bytes(Klass::primary_supers_offset()); |
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1448 if (offset == Type::OffsetBot || |
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1449 (offset >= primary_supers_offset && |
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1450 offset < (int)(primary_supers_offset + Klass::primary_super_limit() * wordSize)) || |
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1451 offset == (int)in_bytes(Klass::secondary_super_cache_offset())) { |
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1452 offset = in_bytes(Klass::secondary_super_cache_offset()); |
0 | 1453 tj = tk = TypeKlassPtr::make( TypePtr::NotNull, tk->klass(), offset ); |
1454 } | |
1455 } | |
1456 | |
1457 // Flatten all Raw pointers together. | |
1458 if (tj->base() == Type::RawPtr) | |
1459 tj = TypeRawPtr::BOTTOM; | |
1460 | |
1461 if (tj->base() == Type::AnyPtr) | |
1462 tj = TypePtr::BOTTOM; // An error, which the caller must check for. | |
1463 | |
1464 // Flatten all to bottom for now | |
1465 switch( _AliasLevel ) { | |
1466 case 0: | |
1467 tj = TypePtr::BOTTOM; | |
1468 break; | |
1469 case 1: // Flatten to: oop, static, field or array | |
1470 switch (tj->base()) { | |
1471 //case Type::AryPtr: tj = TypeAryPtr::RANGE; break; | |
1472 case Type::RawPtr: tj = TypeRawPtr::BOTTOM; break; | |
1473 case Type::AryPtr: // do not distinguish arrays at all | |
1474 case Type::InstPtr: tj = TypeInstPtr::BOTTOM; break; | |
1475 case Type::KlassPtr: tj = TypeKlassPtr::OBJECT; break; | |
1476 case Type::AnyPtr: tj = TypePtr::BOTTOM; break; // caller checks it | |
1477 default: ShouldNotReachHere(); | |
1478 } | |
1479 break; | |
605 | 1480 case 2: // No collapsing at level 2; keep all splits |
1481 case 3: // No collapsing at level 3; keep all splits | |
0 | 1482 break; |
1483 default: | |
1484 Unimplemented(); | |
1485 } | |
1486 | |
1487 offset = tj->offset(); | |
1488 assert( offset != Type::OffsetTop, "Offset has fallen from constant" ); | |
1489 | |
1490 assert( (offset != Type::OffsetBot && tj->base() != Type::AryPtr) || | |
1491 (offset == Type::OffsetBot && tj->base() == Type::AryPtr) || | |
1492 (offset == Type::OffsetBot && tj == TypeOopPtr::BOTTOM) || | |
1493 (offset == Type::OffsetBot && tj == TypePtr::BOTTOM) || | |
1494 (offset == oopDesc::mark_offset_in_bytes() && tj->base() == Type::AryPtr) || | |
1495 (offset == oopDesc::klass_offset_in_bytes() && tj->base() == Type::AryPtr) || | |
1496 (offset == arrayOopDesc::length_offset_in_bytes() && tj->base() == Type::AryPtr) , | |
1497 "For oops, klasses, raw offset must be constant; for arrays the offset is never known" ); | |
1498 assert( tj->ptr() != TypePtr::TopPTR && | |
1499 tj->ptr() != TypePtr::AnyNull && | |
1500 tj->ptr() != TypePtr::Null, "No imprecise addresses" ); | |
1501 // assert( tj->ptr() != TypePtr::Constant || | |
1502 // tj->base() == Type::RawPtr || | |
1503 // tj->base() == Type::KlassPtr, "No constant oop addresses" ); | |
1504 | |
1505 return tj; | |
1506 } | |
1507 | |
1508 void Compile::AliasType::Init(int i, const TypePtr* at) { | |
1509 _index = i; | |
1510 _adr_type = at; | |
1511 _field = NULL; | |
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1512 _element = NULL; |
0 | 1513 _is_rewritable = true; // default |
1514 const TypeOopPtr *atoop = (at != NULL) ? at->isa_oopptr() : NULL; | |
223 | 1515 if (atoop != NULL && atoop->is_known_instance()) { |
1516 const TypeOopPtr *gt = atoop->cast_to_instance_id(TypeOopPtr::InstanceBot); | |
0 | 1517 _general_index = Compile::current()->get_alias_index(gt); |
1518 } else { | |
1519 _general_index = 0; | |
1520 } | |
1521 } | |
1522 | |
1523 //---------------------------------print_on------------------------------------ | |
1524 #ifndef PRODUCT | |
1525 void Compile::AliasType::print_on(outputStream* st) { | |
1526 if (index() < 10) | |
1527 st->print("@ <%d> ", index()); | |
1528 else st->print("@ <%d>", index()); | |
1529 st->print(is_rewritable() ? " " : " RO"); | |
1530 int offset = adr_type()->offset(); | |
1531 if (offset == Type::OffsetBot) | |
1532 st->print(" +any"); | |
1533 else st->print(" +%-3d", offset); | |
1534 st->print(" in "); | |
1535 adr_type()->dump_on(st); | |
1536 const TypeOopPtr* tjp = adr_type()->isa_oopptr(); | |
1537 if (field() != NULL && tjp) { | |
1538 if (tjp->klass() != field()->holder() || | |
1539 tjp->offset() != field()->offset_in_bytes()) { | |
1540 st->print(" != "); | |
1541 field()->print(); | |
1542 st->print(" ***"); | |
1543 } | |
1544 } | |
1545 } | |
1546 | |
1547 void print_alias_types() { | |
1548 Compile* C = Compile::current(); | |
1549 tty->print_cr("--- Alias types, AliasIdxBot .. %d", C->num_alias_types()-1); | |
1550 for (int idx = Compile::AliasIdxBot; idx < C->num_alias_types(); idx++) { | |
1551 C->alias_type(idx)->print_on(tty); | |
1552 tty->cr(); | |
1553 } | |
1554 } | |
1555 #endif | |
1556 | |
1557 | |
1558 //----------------------------probe_alias_cache-------------------------------- | |
1559 Compile::AliasCacheEntry* Compile::probe_alias_cache(const TypePtr* adr_type) { | |
1560 intptr_t key = (intptr_t) adr_type; | |
1561 key ^= key >> logAliasCacheSize; | |
1562 return &_alias_cache[key & right_n_bits(logAliasCacheSize)]; | |
1563 } | |
1564 | |
1565 | |
1566 //-----------------------------grow_alias_types-------------------------------- | |
1567 void Compile::grow_alias_types() { | |
1568 const int old_ats = _max_alias_types; // how many before? | |
1569 const int new_ats = old_ats; // how many more? | |
1570 const int grow_ats = old_ats+new_ats; // how many now? | |
1571 _max_alias_types = grow_ats; | |
1572 _alias_types = REALLOC_ARENA_ARRAY(comp_arena(), AliasType*, _alias_types, old_ats, grow_ats); | |
1573 AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, new_ats); | |
1574 Copy::zero_to_bytes(ats, sizeof(AliasType)*new_ats); | |
1575 for (int i = 0; i < new_ats; i++) _alias_types[old_ats+i] = &ats[i]; | |
1576 } | |
1577 | |
1578 | |
1579 //--------------------------------find_alias_type------------------------------ | |
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1580 Compile::AliasType* Compile::find_alias_type(const TypePtr* adr_type, bool no_create, ciField* original_field) { |
0 | 1581 if (_AliasLevel == 0) |
1582 return alias_type(AliasIdxBot); | |
1583 | |
1584 AliasCacheEntry* ace = probe_alias_cache(adr_type); | |
1585 if (ace->_adr_type == adr_type) { | |
1586 return alias_type(ace->_index); | |
1587 } | |
1588 | |
1589 // Handle special cases. | |
1590 if (adr_type == NULL) return alias_type(AliasIdxTop); | |
1591 if (adr_type == TypePtr::BOTTOM) return alias_type(AliasIdxBot); | |
1592 | |
1593 // Do it the slow way. | |
1594 const TypePtr* flat = flatten_alias_type(adr_type); | |
1595 | |
1596 #ifdef ASSERT | |
1597 assert(flat == flatten_alias_type(flat), "idempotent"); | |
1598 assert(flat != TypePtr::BOTTOM, "cannot alias-analyze an untyped ptr"); | |
1599 if (flat->isa_oopptr() && !flat->isa_klassptr()) { | |
1600 const TypeOopPtr* foop = flat->is_oopptr(); | |
247 | 1601 // Scalarizable allocations have exact klass always. |
1602 bool exact = !foop->klass_is_exact() || foop->is_known_instance(); | |
1603 const TypePtr* xoop = foop->cast_to_exactness(exact)->is_ptr(); | |
0 | 1604 assert(foop == flatten_alias_type(xoop), "exactness must not affect alias type"); |
1605 } | |
1606 assert(flat == flatten_alias_type(flat), "exact bit doesn't matter"); | |
1607 #endif | |
1608 | |
1609 int idx = AliasIdxTop; | |
1610 for (int i = 0; i < num_alias_types(); i++) { | |
1611 if (alias_type(i)->adr_type() == flat) { | |
1612 idx = i; | |
1613 break; | |
1614 } | |
1615 } | |
1616 | |
1617 if (idx == AliasIdxTop) { | |
1618 if (no_create) return NULL; | |
1619 // Grow the array if necessary. | |
1620 if (_num_alias_types == _max_alias_types) grow_alias_types(); | |
1621 // Add a new alias type. | |
1622 idx = _num_alias_types++; | |
1623 _alias_types[idx]->Init(idx, flat); | |
1624 if (flat == TypeInstPtr::KLASS) alias_type(idx)->set_rewritable(false); | |
1625 if (flat == TypeAryPtr::RANGE) alias_type(idx)->set_rewritable(false); | |
1626 if (flat->isa_instptr()) { | |
1627 if (flat->offset() == java_lang_Class::klass_offset_in_bytes() | |
1628 && flat->is_instptr()->klass() == env()->Class_klass()) | |
1629 alias_type(idx)->set_rewritable(false); | |
1630 } | |
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1631 if (flat->isa_aryptr()) { |
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1632 #ifdef ASSERT |
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1633 const int header_size_min = arrayOopDesc::base_offset_in_bytes(T_BYTE); |
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1634 // (T_BYTE has the weakest alignment and size restrictions...) |
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1635 assert(flat->offset() < header_size_min, "array body reference must be OffsetBot"); |
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1636 #endif |
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1637 if (flat->offset() == TypePtr::OffsetBot) { |
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1638 alias_type(idx)->set_element(flat->is_aryptr()->elem()); |
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1639 } |
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1640 } |
0 | 1641 if (flat->isa_klassptr()) { |
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1642 if (flat->offset() == in_bytes(Klass::super_check_offset_offset())) |
0 | 1643 alias_type(idx)->set_rewritable(false); |
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1644 if (flat->offset() == in_bytes(Klass::modifier_flags_offset())) |
0 | 1645 alias_type(idx)->set_rewritable(false); |
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1646 if (flat->offset() == in_bytes(Klass::access_flags_offset())) |
0 | 1647 alias_type(idx)->set_rewritable(false); |
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1648 if (flat->offset() == in_bytes(Klass::java_mirror_offset())) |
0 | 1649 alias_type(idx)->set_rewritable(false); |
1650 } | |
1651 // %%% (We would like to finalize JavaThread::threadObj_offset(), | |
1652 // but the base pointer type is not distinctive enough to identify | |
1653 // references into JavaThread.) | |
1654 | |
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1655 // Check for final fields. |
0 | 1656 const TypeInstPtr* tinst = flat->isa_instptr(); |
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1657 if (tinst && tinst->offset() >= instanceOopDesc::base_offset_in_bytes()) { |
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1658 ciField* field; |
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1659 if (tinst->const_oop() != NULL && |
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1660 tinst->klass() == ciEnv::current()->Class_klass() && |
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1661 tinst->offset() >= (tinst->klass()->as_instance_klass()->size_helper() * wordSize)) { |
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1662 // static field |
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1663 ciInstanceKlass* k = tinst->const_oop()->as_instance()->java_lang_Class_klass()->as_instance_klass(); |
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1664 field = k->get_field_by_offset(tinst->offset(), true); |
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1665 } else { |
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1666 ciInstanceKlass *k = tinst->klass()->as_instance_klass(); |
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1667 field = k->get_field_by_offset(tinst->offset(), false); |
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1668 } |
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1669 assert(field == NULL || |
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1670 original_field == NULL || |
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1671 (field->holder() == original_field->holder() && |
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1672 field->offset() == original_field->offset() && |
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1673 field->is_static() == original_field->is_static()), "wrong field?"); |
0 | 1674 // Set field() and is_rewritable() attributes. |
1675 if (field != NULL) alias_type(idx)->set_field(field); | |
1676 } | |
1677 } | |
1678 | |
1679 // Fill the cache for next time. | |
1680 ace->_adr_type = adr_type; | |
1681 ace->_index = idx; | |
1682 assert(alias_type(adr_type) == alias_type(idx), "type must be installed"); | |
1683 | |
1684 // Might as well try to fill the cache for the flattened version, too. | |
1685 AliasCacheEntry* face = probe_alias_cache(flat); | |
1686 if (face->_adr_type == NULL) { | |
1687 face->_adr_type = flat; | |
1688 face->_index = idx; | |
1689 assert(alias_type(flat) == alias_type(idx), "flat type must work too"); | |
1690 } | |
1691 | |
1692 return alias_type(idx); | |
1693 } | |
1694 | |
1695 | |
1696 Compile::AliasType* Compile::alias_type(ciField* field) { | |
1697 const TypeOopPtr* t; | |
1698 if (field->is_static()) | |
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1699 t = TypeInstPtr::make(field->holder()->java_mirror()); |
0 | 1700 else |
1701 t = TypeOopPtr::make_from_klass_raw(field->holder()); | |
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1702 AliasType* atp = alias_type(t->add_offset(field->offset_in_bytes()), field); |
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1703 assert((field->is_final() || field->is_stable()) == !atp->is_rewritable(), "must get the rewritable bits correct"); |
0 | 1704 return atp; |
1705 } | |
1706 | |
1707 | |
1708 //------------------------------have_alias_type-------------------------------- | |
1709 bool Compile::have_alias_type(const TypePtr* adr_type) { | |
1710 AliasCacheEntry* ace = probe_alias_cache(adr_type); | |
1711 if (ace->_adr_type == adr_type) { | |
1712 return true; | |
1713 } | |
1714 | |
1715 // Handle special cases. | |
1716 if (adr_type == NULL) return true; | |
1717 if (adr_type == TypePtr::BOTTOM) return true; | |
1718 | |
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1719 return find_alias_type(adr_type, true, NULL) != NULL; |
0 | 1720 } |
1721 | |
1722 //-----------------------------must_alias-------------------------------------- | |
1723 // True if all values of the given address type are in the given alias category. | |
1724 bool Compile::must_alias(const TypePtr* adr_type, int alias_idx) { | |
1725 if (alias_idx == AliasIdxBot) return true; // the universal category | |
1726 if (adr_type == NULL) return true; // NULL serves as TypePtr::TOP | |
1727 if (alias_idx == AliasIdxTop) return false; // the empty category | |
1728 if (adr_type->base() == Type::AnyPtr) return false; // TypePtr::BOTTOM or its twins | |
1729 | |
1730 // the only remaining possible overlap is identity | |
1731 int adr_idx = get_alias_index(adr_type); | |
1732 assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, ""); | |
1733 assert(adr_idx == alias_idx || | |
1734 (alias_type(alias_idx)->adr_type() != TypeOopPtr::BOTTOM | |
1735 && adr_type != TypeOopPtr::BOTTOM), | |
1736 "should not be testing for overlap with an unsafe pointer"); | |
1737 return adr_idx == alias_idx; | |
1738 } | |
1739 | |
1740 //------------------------------can_alias-------------------------------------- | |
1741 // True if any values of the given address type are in the given alias category. | |
1742 bool Compile::can_alias(const TypePtr* adr_type, int alias_idx) { | |
1743 if (alias_idx == AliasIdxTop) return false; // the empty category | |
1744 if (adr_type == NULL) return false; // NULL serves as TypePtr::TOP | |
1745 if (alias_idx == AliasIdxBot) return true; // the universal category | |
1746 if (adr_type->base() == Type::AnyPtr) return true; // TypePtr::BOTTOM or its twins | |
1747 | |
1748 // the only remaining possible overlap is identity | |
1749 int adr_idx = get_alias_index(adr_type); | |
1750 assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, ""); | |
1751 return adr_idx == alias_idx; | |
1752 } | |
1753 | |
1754 | |
1755 | |
1756 //---------------------------pop_warm_call------------------------------------- | |
1757 WarmCallInfo* Compile::pop_warm_call() { | |
1758 WarmCallInfo* wci = _warm_calls; | |
1759 if (wci != NULL) _warm_calls = wci->remove_from(wci); | |
1760 return wci; | |
1761 } | |
1762 | |
1763 //----------------------------Inline_Warm-------------------------------------- | |
1764 int Compile::Inline_Warm() { | |
1765 // If there is room, try to inline some more warm call sites. | |
1766 // %%% Do a graph index compaction pass when we think we're out of space? | |
1767 if (!InlineWarmCalls) return 0; | |
1768 | |
1769 int calls_made_hot = 0; | |
1770 int room_to_grow = NodeCountInliningCutoff - unique(); | |
1771 int amount_to_grow = MIN2(room_to_grow, (int)NodeCountInliningStep); | |
1772 int amount_grown = 0; | |
1773 WarmCallInfo* call; | |
1774 while (amount_to_grow > 0 && (call = pop_warm_call()) != NULL) { | |
1775 int est_size = (int)call->size(); | |
1776 if (est_size > (room_to_grow - amount_grown)) { | |
1777 // This one won't fit anyway. Get rid of it. | |
1778 call->make_cold(); | |
1779 continue; | |
1780 } | |
1781 call->make_hot(); | |
1782 calls_made_hot++; | |
1783 amount_grown += est_size; | |
1784 amount_to_grow -= est_size; | |
1785 } | |
1786 | |
1787 if (calls_made_hot > 0) set_major_progress(); | |
1788 return calls_made_hot; | |
1789 } | |
1790 | |
1791 | |
1792 //----------------------------Finish_Warm-------------------------------------- | |
1793 void Compile::Finish_Warm() { | |
1794 if (!InlineWarmCalls) return; | |
1795 if (failing()) return; | |
1796 if (warm_calls() == NULL) return; | |
1797 | |
1798 // Clean up loose ends, if we are out of space for inlining. | |
1799 WarmCallInfo* call; | |
1800 while ((call = pop_warm_call()) != NULL) { | |
1801 call->make_cold(); | |
1802 } | |
1803 } | |
1804 | |
1172 | 1805 //---------------------cleanup_loop_predicates----------------------- |
1806 // Remove the opaque nodes that protect the predicates so that all unused | |
1807 // checks and uncommon_traps will be eliminated from the ideal graph | |
1808 void Compile::cleanup_loop_predicates(PhaseIterGVN &igvn) { | |
1809 if (predicate_count()==0) return; | |
1810 for (int i = predicate_count(); i > 0; i--) { | |
1811 Node * n = predicate_opaque1_node(i-1); | |
1812 assert(n->Opcode() == Op_Opaque1, "must be"); | |
1813 igvn.replace_node(n, n->in(1)); | |
1814 } | |
1815 assert(predicate_count()==0, "should be clean!"); | |
1816 } | |
0 | 1817 |
7473 | 1818 // StringOpts and late inlining of string methods |
1819 void Compile::inline_string_calls(bool parse_time) { | |
1820 { | |
1821 // remove useless nodes to make the usage analysis simpler | |
1822 ResourceMark rm; | |
1823 PhaseRemoveUseless pru(initial_gvn(), for_igvn()); | |
1824 } | |
1825 | |
1826 { | |
1827 ResourceMark rm; | |
10405 | 1828 print_method(PHASE_BEFORE_STRINGOPTS, 3); |
7473 | 1829 PhaseStringOpts pso(initial_gvn(), for_igvn()); |
10405 | 1830 print_method(PHASE_AFTER_STRINGOPTS, 3); |
7473 | 1831 } |
1832 | |
1833 // now inline anything that we skipped the first time around | |
1834 if (!parse_time) { | |
1835 _late_inlines_pos = _late_inlines.length(); | |
1836 } | |
1837 | |
1838 while (_string_late_inlines.length() > 0) { | |
1839 CallGenerator* cg = _string_late_inlines.pop(); | |
1840 cg->do_late_inline(); | |
1841 if (failing()) return; | |
1842 } | |
1843 _string_late_inlines.trunc_to(0); | |
1844 } | |
1845 | |
10278 | 1846 // Late inlining of boxing methods |
1847 void Compile::inline_boxing_calls(PhaseIterGVN& igvn) { | |
1848 if (_boxing_late_inlines.length() > 0) { | |
1849 assert(has_boxed_value(), "inconsistent"); | |
1850 | |
1851 PhaseGVN* gvn = initial_gvn(); | |
1852 set_inlining_incrementally(true); | |
1853 | |
1854 assert( igvn._worklist.size() == 0, "should be done with igvn" ); | |
1855 for_igvn()->clear(); | |
1856 gvn->replace_with(&igvn); | |
1857 | |
1858 while (_boxing_late_inlines.length() > 0) { | |
1859 CallGenerator* cg = _boxing_late_inlines.pop(); | |
1860 cg->do_late_inline(); | |
1861 if (failing()) return; | |
1862 } | |
1863 _boxing_late_inlines.trunc_to(0); | |
1864 | |
1865 { | |
1866 ResourceMark rm; | |
1867 PhaseRemoveUseless pru(gvn, for_igvn()); | |
1868 } | |
1869 | |
1870 igvn = PhaseIterGVN(gvn); | |
1871 igvn.optimize(); | |
1872 | |
1873 set_inlining_progress(false); | |
1874 set_inlining_incrementally(false); | |
1875 } | |
1876 } | |
1877 | |
7473 | 1878 void Compile::inline_incrementally_one(PhaseIterGVN& igvn) { |
1879 assert(IncrementalInline, "incremental inlining should be on"); | |
1880 PhaseGVN* gvn = initial_gvn(); | |
1881 | |
1882 set_inlining_progress(false); | |
1883 for_igvn()->clear(); | |
1884 gvn->replace_with(&igvn); | |
1885 | |
1886 int i = 0; | |
1887 | |
1888 for (; i <_late_inlines.length() && !inlining_progress(); i++) { | |
1889 CallGenerator* cg = _late_inlines.at(i); | |
1890 _late_inlines_pos = i+1; | |
1891 cg->do_late_inline(); | |
1892 if (failing()) return; | |
1893 } | |
1894 int j = 0; | |
1895 for (; i < _late_inlines.length(); i++, j++) { | |
1896 _late_inlines.at_put(j, _late_inlines.at(i)); | |
1897 } | |
1898 _late_inlines.trunc_to(j); | |
1899 | |
1900 { | |
1901 ResourceMark rm; | |
10278 | 1902 PhaseRemoveUseless pru(gvn, for_igvn()); |
7473 | 1903 } |
1904 | |
1905 igvn = PhaseIterGVN(gvn); | |
1906 } | |
1907 | |
1908 // Perform incremental inlining until bound on number of live nodes is reached | |
1909 void Compile::inline_incrementally(PhaseIterGVN& igvn) { | |
1910 PhaseGVN* gvn = initial_gvn(); | |
1911 | |
1912 set_inlining_incrementally(true); | |
1913 set_inlining_progress(true); | |
1914 uint low_live_nodes = 0; | |
1915 | |
1916 while(inlining_progress() && _late_inlines.length() > 0) { | |
1917 | |
1918 if (live_nodes() > (uint)LiveNodeCountInliningCutoff) { | |
1919 if (low_live_nodes < (uint)LiveNodeCountInliningCutoff * 8 / 10) { | |
1920 // PhaseIdealLoop is expensive so we only try it once we are | |
1921 // out of loop and we only try it again if the previous helped | |
1922 // got the number of nodes down significantly | |
1923 PhaseIdealLoop ideal_loop( igvn, false, true ); | |
1924 if (failing()) return; | |
1925 low_live_nodes = live_nodes(); | |
1926 _major_progress = true; | |
1927 } | |
1928 | |
1929 if (live_nodes() > (uint)LiveNodeCountInliningCutoff) { | |
1930 break; | |
1931 } | |
1932 } | |
1933 | |
1934 inline_incrementally_one(igvn); | |
1935 | |
1936 if (failing()) return; | |
1937 | |
1938 igvn.optimize(); | |
1939 | |
1940 if (failing()) return; | |
1941 } | |
1942 | |
1943 assert( igvn._worklist.size() == 0, "should be done with igvn" ); | |
1944 | |
1945 if (_string_late_inlines.length() > 0) { | |
1946 assert(has_stringbuilder(), "inconsistent"); | |
1947 for_igvn()->clear(); | |
1948 initial_gvn()->replace_with(&igvn); | |
1949 | |
1950 inline_string_calls(false); | |
1951 | |
1952 if (failing()) return; | |
1953 | |
1954 { | |
1955 ResourceMark rm; | |
1956 PhaseRemoveUseless pru(initial_gvn(), for_igvn()); | |
1957 } | |
1958 | |
1959 igvn = PhaseIterGVN(gvn); | |
1960 | |
1961 igvn.optimize(); | |
1962 } | |
1963 | |
1964 set_inlining_incrementally(false); | |
1965 } | |
1966 | |
1967 | |
0 | 1968 //------------------------------Optimize--------------------------------------- |
1969 // Given a graph, optimize it. | |
1970 void Compile::Optimize() { | |
1971 TracePhase t1("optimizer", &_t_optimizer, true); | |
1972 | |
1973 #ifndef PRODUCT | |
1974 if (env()->break_at_compile()) { | |
1975 BREAKPOINT; | |
1976 } | |
1977 | |
1978 #endif | |
1979 | |
1980 ResourceMark rm; | |
1981 int loop_opts_cnt; | |
1982 | |
1983 NOT_PRODUCT( verify_graph_edges(); ) | |
1984 | |
10405 | 1985 print_method(PHASE_AFTER_PARSING); |
0 | 1986 |
1987 { | |
1988 // Iterative Global Value Numbering, including ideal transforms | |
1989 // Initialize IterGVN with types and values from parse-time GVN | |
1990 PhaseIterGVN igvn(initial_gvn()); | |
1991 { | |
1992 NOT_PRODUCT( TracePhase t2("iterGVN", &_t_iterGVN, TimeCompiler); ) | |
1993 igvn.optimize(); | |
1994 } | |
1995 | |
10405 | 1996 print_method(PHASE_ITER_GVN1, 2); |
0 | 1997 |
1998 if (failing()) return; | |
1999 | |
10278 | 2000 { |
2001 NOT_PRODUCT( TracePhase t2("incrementalInline", &_t_incrInline, TimeCompiler); ) | |
2002 inline_incrementally(igvn); | |
2003 } | |
7473 | 2004 |
10405 | 2005 print_method(PHASE_INCREMENTAL_INLINE, 2); |
7473 | 2006 |
2007 if (failing()) return; | |
2008 | |
10278 | 2009 if (eliminate_boxing()) { |
2010 NOT_PRODUCT( TracePhase t2("incrementalInline", &_t_incrInline, TimeCompiler); ) | |
2011 // Inline valueOf() methods now. | |
2012 inline_boxing_calls(igvn); | |
2013 | |
10405 | 2014 print_method(PHASE_INCREMENTAL_BOXING_INLINE, 2); |
10278 | 2015 |
2016 if (failing()) return; | |
2017 } | |
2018 | |
12966 | 2019 // Remove the speculative part of types and clean up the graph from |
2020 // the extra CastPP nodes whose only purpose is to carry them. Do | |
2021 // that early so that optimizations are not disrupted by the extra | |
2022 // CastPP nodes. | |
2023 remove_speculative_types(igvn); | |
2024 | |
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2025 // No more new expensive nodes will be added to the list from here |
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2026 // so keep only the actual candidates for optimizations. |
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2027 cleanup_expensive_nodes(igvn); |
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2028 |
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2029 // Perform escape analysis |
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2030 if (_do_escape_analysis && ConnectionGraph::has_candidates(this)) { |
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2031 if (has_loops()) { |
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2032 // Cleanup graph (remove dead nodes). |
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2033 TracePhase t2("idealLoop", &_t_idealLoop, true); |
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2034 PhaseIdealLoop ideal_loop( igvn, false, true ); |
10405 | 2035 if (major_progress()) print_method(PHASE_PHASEIDEAL_BEFORE_EA, 2); |
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|
2036 if (failing()) return; |
670a74b863fc
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3899
diff
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|
2037 } |
1634
60a14ad85270
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1609
diff
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|
2038 ConnectionGraph::do_analysis(this, &igvn); |
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
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1609
diff
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|
2039 |
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diff
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|
2040 if (failing()) return; |
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6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
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diff
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|
2041 |
4115 | 2042 // Optimize out fields loads from scalar replaceable allocations. |
1634
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6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
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1609
diff
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|
2043 igvn.optimize(); |
10405 | 2044 print_method(PHASE_ITER_GVN_AFTER_EA, 2); |
1634
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diff
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|
2045 |
60a14ad85270
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diff
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|
2046 if (failing()) return; |
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diff
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|
2047 |
4115 | 2048 if (congraph() != NULL && macro_count() > 0) { |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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4767
diff
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|
2049 NOT_PRODUCT( TracePhase t2("macroEliminate", &_t_macroEliminate, TimeCompiler); ) |
4115 | 2050 PhaseMacroExpand mexp(igvn); |
2051 mexp.eliminate_macro_nodes(); | |
2052 igvn.set_delay_transform(false); | |
2053 | |
2054 igvn.optimize(); | |
10405 | 2055 print_method(PHASE_ITER_GVN_AFTER_ELIMINATION, 2); |
4115 | 2056 |
2057 if (failing()) return; | |
2058 } | |
1634
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1609
diff
changeset
|
2059 } |
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diff
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|
2060 |
0 | 2061 // Loop transforms on the ideal graph. Range Check Elimination, |
2062 // peeling, unrolling, etc. | |
2063 | |
2064 // Set loop opts counter | |
2065 loop_opts_cnt = num_loop_opts(); | |
2066 if((loop_opts_cnt > 0) && (has_loops() || has_split_ifs())) { | |
2067 { | |
2068 TracePhase t2("idealLoop", &_t_idealLoop, true); | |
2445 | 2069 PhaseIdealLoop ideal_loop( igvn, true ); |
0 | 2070 loop_opts_cnt--; |
10405 | 2071 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP1, 2); |
0 | 2072 if (failing()) return; |
2073 } | |
2074 // Loop opts pass if partial peeling occurred in previous pass | |
2075 if(PartialPeelLoop && major_progress() && (loop_opts_cnt > 0)) { | |
2076 TracePhase t3("idealLoop", &_t_idealLoop, true); | |
2445 | 2077 PhaseIdealLoop ideal_loop( igvn, false ); |
0 | 2078 loop_opts_cnt--; |
10405 | 2079 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP2, 2); |
0 | 2080 if (failing()) return; |
2081 } | |
2082 // Loop opts pass for loop-unrolling before CCP | |
2083 if(major_progress() && (loop_opts_cnt > 0)) { | |
2084 TracePhase t4("idealLoop", &_t_idealLoop, true); | |
2445 | 2085 PhaseIdealLoop ideal_loop( igvn, false ); |
0 | 2086 loop_opts_cnt--; |
10405 | 2087 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP3, 2); |
0 | 2088 } |
921
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859
diff
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|
2089 if (!failing()) { |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
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859
diff
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|
2090 // Verify that last round of loop opts produced a valid graph |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
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859
diff
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|
2091 NOT_PRODUCT( TracePhase t2("idealLoopVerify", &_t_idealLoopVerify, TimeCompiler); ) |
046932b72aa2
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|
2092 PhaseIdealLoop::verify(igvn); |
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|
2093 } |
0 | 2094 } |
2095 if (failing()) return; | |
2096 | |
2097 // Conditional Constant Propagation; | |
2098 PhaseCCP ccp( &igvn ); | |
2099 assert( true, "Break here to ccp.dump_nodes_and_types(_root,999,1)"); | |
2100 { | |
2101 TracePhase t2("ccp", &_t_ccp, true); | |
2102 ccp.do_transform(); | |
2103 } | |
10405 | 2104 print_method(PHASE_CPP1, 2); |
0 | 2105 |
2106 assert( true, "Break here to ccp.dump_old2new_map()"); | |
2107 | |
2108 // Iterative Global Value Numbering, including ideal transforms | |
2109 { | |
2110 NOT_PRODUCT( TracePhase t2("iterGVN2", &_t_iterGVN2, TimeCompiler); ) | |
2111 igvn = ccp; | |
2112 igvn.optimize(); | |
2113 } | |
2114 | |
10405 | 2115 print_method(PHASE_ITER_GVN2, 2); |
0 | 2116 |
2117 if (failing()) return; | |
2118 | |
2119 // Loop transforms on the ideal graph. Range Check Elimination, | |
2120 // peeling, unrolling, etc. | |
2121 if(loop_opts_cnt > 0) { | |
2122 debug_only( int cnt = 0; ); | |
2123 while(major_progress() && (loop_opts_cnt > 0)) { | |
2124 TracePhase t2("idealLoop", &_t_idealLoop, true); | |
2125 assert( cnt++ < 40, "infinite cycle in loop optimization" ); | |
2445 | 2126 PhaseIdealLoop ideal_loop( igvn, true); |
0 | 2127 loop_opts_cnt--; |
10405 | 2128 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP_ITERATIONS, 2); |
0 | 2129 if (failing()) return; |
2130 } | |
2131 } | |
921
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|
2132 |
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diff
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|
2133 { |
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diff
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|
2134 // Verify that all previous optimizations produced a valid graph |
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diff
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|
2135 // at least to this point, even if no loop optimizations were done. |
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|
2136 NOT_PRODUCT( TracePhase t2("idealLoopVerify", &_t_idealLoopVerify, TimeCompiler); ) |
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diff
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|
2137 PhaseIdealLoop::verify(igvn); |
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diff
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|
2138 } |
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|
2139 |
0 | 2140 { |
2141 NOT_PRODUCT( TracePhase t2("macroExpand", &_t_macroExpand, TimeCompiler); ) | |
2142 PhaseMacroExpand mex(igvn); | |
2143 if (mex.expand_macro_nodes()) { | |
2144 assert(failing(), "must bail out w/ explicit message"); | |
2145 return; | |
2146 } | |
2147 } | |
2148 | |
2149 } // (End scope of igvn; run destructor if necessary for asserts.) | |
2150 | |
7605 | 2151 dump_inlining(); |
0 | 2152 // A method with only infinite loops has no edges entering loops from root |
2153 { | |
2154 NOT_PRODUCT( TracePhase t2("graphReshape", &_t_graphReshaping, TimeCompiler); ) | |
2155 if (final_graph_reshaping()) { | |
2156 assert(failing(), "must bail out w/ explicit message"); | |
2157 return; | |
2158 } | |
2159 } | |
2160 | |
10405 | 2161 print_method(PHASE_OPTIMIZE_FINISHED, 2); |
0 | 2162 } |
2163 | |
2164 | |
2165 //------------------------------Code_Gen--------------------------------------- | |
2166 // Given a graph, generate code for it | |
2167 void Compile::Code_Gen() { | |
12071
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8023003: Cleanup the public interface to PhaseCFG
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|
2168 if (failing()) { |
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|
2169 return; |
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|
2170 } |
0 | 2171 |
2172 // Perform instruction selection. You might think we could reclaim Matcher | |
2173 // memory PDQ, but actually the Matcher is used in generating spill code. | |
2174 // Internals of the Matcher (including some VectorSets) must remain live | |
2175 // for awhile - thus I cannot reclaim Matcher memory lest a VectorSet usage | |
2176 // set a bit in reclaimed memory. | |
2177 | |
2178 // In debug mode can dump m._nodes.dump() for mapping of ideal to machine | |
2179 // nodes. Mapping is only valid at the root of each matched subtree. | |
2180 NOT_PRODUCT( verify_graph_edges(); ) | |
2181 | |
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8023003: Cleanup the public interface to PhaseCFG
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|
2182 Matcher matcher; |
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8023003: Cleanup the public interface to PhaseCFG
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|
2183 _matcher = &matcher; |
0 | 2184 { |
2185 TracePhase t2("matcher", &_t_matcher, true); | |
12071
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8023003: Cleanup the public interface to PhaseCFG
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|
2186 matcher.match(); |
0 | 2187 } |
2188 // In debug mode can dump m._nodes.dump() for mapping of ideal to machine | |
2189 // nodes. Mapping is only valid at the root of each matched subtree. | |
2190 NOT_PRODUCT( verify_graph_edges(); ) | |
2191 | |
2192 // If you have too many nodes, or if matching has failed, bail out | |
2193 check_node_count(0, "out of nodes matching instructions"); | |
12071
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8023003: Cleanup the public interface to PhaseCFG
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|
2194 if (failing()) { |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
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diff
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|
2195 return; |
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8023003: Cleanup the public interface to PhaseCFG
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|
2196 } |
0 | 2197 |
2198 // Build a proper-looking CFG | |
12071
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8023003: Cleanup the public interface to PhaseCFG
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|
2199 PhaseCFG cfg(node_arena(), root(), matcher); |
0 | 2200 _cfg = &cfg; |
2201 { | |
2202 NOT_PRODUCT( TracePhase t2("scheduler", &_t_scheduler, TimeCompiler); ) | |
12071
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8023003: Cleanup the public interface to PhaseCFG
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|
2203 bool success = cfg.do_global_code_motion(); |
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8023003: Cleanup the public interface to PhaseCFG
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diff
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|
2204 if (!success) { |
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8023003: Cleanup the public interface to PhaseCFG
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diff
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|
2205 return; |
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|
2206 } |
0 | 2207 |
10405 | 2208 print_method(PHASE_GLOBAL_CODE_MOTION, 2); |
0 | 2209 NOT_PRODUCT( verify_graph_edges(); ) |
2210 debug_only( cfg.verify(); ) | |
2211 } | |
12071
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8023003: Cleanup the public interface to PhaseCFG
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|
2212 |
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|
2213 PhaseChaitin regalloc(unique(), cfg, matcher); |
0 | 2214 _regalloc = ®alloc; |
2215 { | |
2216 TracePhase t2("regalloc", &_t_registerAllocation, true); | |
2217 // Perform register allocation. After Chaitin, use-def chains are | |
2218 // no longer accurate (at spill code) and so must be ignored. | |
2219 // Node->LRG->reg mappings are still accurate. | |
2220 _regalloc->Register_Allocate(); | |
2221 | |
2222 // Bail out if the allocator builds too many nodes | |
10111 | 2223 if (failing()) { |
2224 return; | |
2225 } | |
0 | 2226 } |
2227 | |
2228 // Prior to register allocation we kept empty basic blocks in case the | |
2229 // the allocator needed a place to spill. After register allocation we | |
2230 // are not adding any new instructions. If any basic block is empty, we | |
2231 // can now safely remove it. | |
2232 { | |
418 | 2233 NOT_PRODUCT( TracePhase t2("blockOrdering", &_t_blockOrdering, TimeCompiler); ) |
12071
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8023003: Cleanup the public interface to PhaseCFG
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|
2234 cfg.remove_empty_blocks(); |
418 | 2235 if (do_freq_based_layout()) { |
2236 PhaseBlockLayout layout(cfg); | |
2237 } else { | |
2238 cfg.set_loop_alignment(); | |
2239 } | |
2240 cfg.fixup_flow(); | |
0 | 2241 } |
2242 | |
2243 // Apply peephole optimizations | |
2244 if( OptoPeephole ) { | |
2245 NOT_PRODUCT( TracePhase t2("peephole", &_t_peephole, TimeCompiler); ) | |
2246 PhasePeephole peep( _regalloc, cfg); | |
2247 peep.do_transform(); | |
2248 } | |
2249 | |
2250 // Convert Nodes to instruction bits in a buffer | |
2251 { | |
2252 // %%%% workspace merge brought two timers together for one job | |
2253 TracePhase t2a("output", &_t_output, true); | |
2254 NOT_PRODUCT( TraceTime t2b(NULL, &_t_codeGeneration, TimeCompiler, false); ) | |
2255 Output(); | |
2256 } | |
2257 | |
10405 | 2258 print_method(PHASE_FINAL_CODE); |
0 | 2259 |
2260 // He's dead, Jim. | |
2261 _cfg = (PhaseCFG*)0xdeadbeef; | |
2262 _regalloc = (PhaseChaitin*)0xdeadbeef; | |
2263 } | |
2264 | |
2265 | |
2266 //------------------------------dump_asm--------------------------------------- | |
2267 // Dump formatted assembly | |
2268 #ifndef PRODUCT | |
2269 void Compile::dump_asm(int *pcs, uint pc_limit) { | |
2270 bool cut_short = false; | |
2271 tty->print_cr("#"); | |
2272 tty->print("# "); _tf->dump(); tty->cr(); | |
2273 tty->print_cr("#"); | |
2274 | |
2275 // For all blocks | |
2276 int pc = 0x0; // Program counter | |
2277 char starts_bundle = ' '; | |
2278 _regalloc->dump_frame(); | |
2279 | |
2280 Node *n = NULL; | |
12071
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8023003: Cleanup the public interface to PhaseCFG
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2281 for (uint i = 0; i < _cfg->number_of_blocks(); i++) { |
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8023003: Cleanup the public interface to PhaseCFG
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2282 if (VMThread::should_terminate()) { |
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|
2283 cut_short = true; |
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|
2284 break; |
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|
2285 } |
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2286 Block* block = _cfg->get_block(i); |
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2287 if (block->is_connector() && !Verbose) { |
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|
2288 continue; |
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|
2289 } |
12167
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8023691: Create interface for nodes in class Block
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|
2290 n = block->head(); |
12071
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8023003: Cleanup the public interface to PhaseCFG
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2291 if (pcs && n->_idx < pc_limit) { |
0 | 2292 tty->print("%3.3x ", pcs[n->_idx]); |
12071
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8023003: Cleanup the public interface to PhaseCFG
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2293 } else { |
0 | 2294 tty->print(" "); |
12071
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8023003: Cleanup the public interface to PhaseCFG
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|
2295 } |
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2296 block->dump_head(_cfg); |
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2297 if (block->is_connector()) { |
0 | 2298 tty->print_cr(" # Empty connector block"); |
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2299 } else if (block->num_preds() == 2 && block->pred(1)->is_CatchProj() && block->pred(1)->as_CatchProj()->_con == CatchProjNode::fall_through_index) { |
0 | 2300 tty->print_cr(" # Block is sole successor of call"); |
2301 } | |
2302 | |
2303 // For all instructions | |
2304 Node *delay = NULL; | |
12167
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2305 for (uint j = 0; j < block->number_of_nodes(); j++) { |
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2306 if (VMThread::should_terminate()) { |
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8023003: Cleanup the public interface to PhaseCFG
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2307 cut_short = true; |
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|
2308 break; |
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|
2309 } |
12167
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2310 n = block->get_node(j); |
0 | 2311 if (valid_bundle_info(n)) { |
12071
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2312 Bundle* bundle = node_bundling(n); |
0 | 2313 if (bundle->used_in_unconditional_delay()) { |
2314 delay = n; | |
2315 continue; | |
2316 } | |
12071
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8023003: Cleanup the public interface to PhaseCFG
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2317 if (bundle->starts_bundle()) { |
0 | 2318 starts_bundle = '+'; |
12071
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8023003: Cleanup the public interface to PhaseCFG
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|
2319 } |
0 | 2320 } |
2321 | |
12071
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8023003: Cleanup the public interface to PhaseCFG
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2322 if (WizardMode) { |
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|
2323 n->dump(); |
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|
2324 } |
113
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|
2325 |
0 | 2326 if( !n->is_Region() && // Dont print in the Assembly |
2327 !n->is_Phi() && // a few noisely useless nodes | |
2328 !n->is_Proj() && | |
2329 !n->is_MachTemp() && | |
1100
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1080
diff
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|
2330 !n->is_SafePointScalarObject() && |
0 | 2331 !n->is_Catch() && // Would be nice to print exception table targets |
2332 !n->is_MergeMem() && // Not very interesting | |
2333 !n->is_top() && // Debug info table constants | |
2334 !(n->is_Con() && !n->is_Mach())// Debug info table constants | |
2335 ) { | |
2336 if (pcs && n->_idx < pc_limit) | |
2337 tty->print("%3.3x", pcs[n->_idx]); | |
2338 else | |
2339 tty->print(" "); | |
2340 tty->print(" %c ", starts_bundle); | |
2341 starts_bundle = ' '; | |
2342 tty->print("\t"); | |
2343 n->format(_regalloc, tty); | |
2344 tty->cr(); | |
2345 } | |
2346 | |
2347 // If we have an instruction with a delay slot, and have seen a delay, | |
2348 // then back up and print it | |
2349 if (valid_bundle_info(n) && node_bundling(n)->use_unconditional_delay()) { | |
2350 assert(delay != NULL, "no unconditional delay instruction"); | |
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2351 if (WizardMode) delay->dump(); |
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|
2352 |
0 | 2353 if (node_bundling(delay)->starts_bundle()) |
2354 starts_bundle = '+'; | |
2355 if (pcs && n->_idx < pc_limit) | |
2356 tty->print("%3.3x", pcs[n->_idx]); | |
2357 else | |
2358 tty->print(" "); | |
2359 tty->print(" %c ", starts_bundle); | |
2360 starts_bundle = ' '; | |
2361 tty->print("\t"); | |
2362 delay->format(_regalloc, tty); | |
2363 tty->print_cr(""); | |
2364 delay = NULL; | |
2365 } | |
2366 | |
2367 // Dump the exception table as well | |
2368 if( n->is_Catch() && (Verbose || WizardMode) ) { | |
2369 // Print the exception table for this offset | |
2370 _handler_table.print_subtable_for(pc); | |
2371 } | |
2372 } | |
2373 | |
2374 if (pcs && n->_idx < pc_limit) | |
2375 tty->print_cr("%3.3x", pcs[n->_idx]); | |
2376 else | |
2377 tty->print_cr(""); | |
2378 | |
2379 assert(cut_short || delay == NULL, "no unconditional delay branch"); | |
2380 | |
2381 } // End of per-block dump | |
2382 tty->print_cr(""); | |
2383 | |
2384 if (cut_short) tty->print_cr("*** disassembly is cut short ***"); | |
2385 } | |
2386 #endif | |
2387 | |
2388 //------------------------------Final_Reshape_Counts--------------------------- | |
2389 // This class defines counters to help identify when a method | |
2390 // may/must be executed using hardware with only 24-bit precision. | |
2391 struct Final_Reshape_Counts : public StackObj { | |
2392 int _call_count; // count non-inlined 'common' calls | |
2393 int _float_count; // count float ops requiring 24-bit precision | |
2394 int _double_count; // count double ops requiring more precision | |
2395 int _java_call_count; // count non-inlined 'java' calls | |
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2396 int _inner_loop_count; // count loops which need alignment |
0 | 2397 VectorSet _visited; // Visitation flags |
2398 Node_List _tests; // Set of IfNodes & PCTableNodes | |
2399 | |
2400 Final_Reshape_Counts() : | |
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2401 _call_count(0), _float_count(0), _double_count(0), |
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|
2402 _java_call_count(0), _inner_loop_count(0), |
0 | 2403 _visited( Thread::current()->resource_area() ) { } |
2404 | |
2405 void inc_call_count () { _call_count ++; } | |
2406 void inc_float_count () { _float_count ++; } | |
2407 void inc_double_count() { _double_count++; } | |
2408 void inc_java_call_count() { _java_call_count++; } | |
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2409 void inc_inner_loop_count() { _inner_loop_count++; } |
0 | 2410 |
2411 int get_call_count () const { return _call_count ; } | |
2412 int get_float_count () const { return _float_count ; } | |
2413 int get_double_count() const { return _double_count; } | |
2414 int get_java_call_count() const { return _java_call_count; } | |
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2415 int get_inner_loop_count() const { return _inner_loop_count; } |
0 | 2416 }; |
2417 | |
9060
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|
2418 #ifdef ASSERT |
0 | 2419 static bool oop_offset_is_sane(const TypeInstPtr* tp) { |
2420 ciInstanceKlass *k = tp->klass()->as_instance_klass(); | |
2421 // Make sure the offset goes inside the instance layout. | |
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2422 return k->contains_field_offset(tp->offset()); |
0 | 2423 // Note that OffsetBot and OffsetTop are very negative. |
2424 } | |
9060
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2425 #endif |
0 | 2426 |
3248
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|
2427 // Eliminate trivially redundant StoreCMs and accumulate their |
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|
2428 // precedence edges. |
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2429 void Compile::eliminate_redundant_card_marks(Node* n) { |
3248
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diff
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|
2430 assert(n->Opcode() == Op_StoreCM, "expected StoreCM"); |
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7032963: StoreCM shouldn't participate in store elimination
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2431 if (n->in(MemNode::Address)->outcnt() > 1) { |
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|
2432 // There are multiple users of the same address so it might be |
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diff
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|
2433 // possible to eliminate some of the StoreCMs |
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diff
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|
2434 Node* mem = n->in(MemNode::Memory); |
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|
2435 Node* adr = n->in(MemNode::Address); |
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|
2436 Node* val = n->in(MemNode::ValueIn); |
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diff
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|
2437 Node* prev = n; |
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diff
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|
2438 bool done = false; |
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diff
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|
2439 // Walk the chain of StoreCMs eliminating ones that match. As |
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diff
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|
2440 // long as it's a chain of single users then the optimization is |
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parents:
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diff
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|
2441 // safe. Eliminating partially redundant StoreCMs would require |
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diff
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|
2442 // cloning copies down the other paths. |
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diff
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|
2443 while (mem->Opcode() == Op_StoreCM && mem->outcnt() == 1 && !done) { |
e6beb62de02d
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diff
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|
2444 if (adr == mem->in(MemNode::Address) && |
e6beb62de02d
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parents:
2376
diff
changeset
|
2445 val == mem->in(MemNode::ValueIn)) { |
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parents:
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diff
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|
2446 // redundant StoreCM |
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7032963: StoreCM shouldn't participate in store elimination
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diff
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|
2447 if (mem->req() > MemNode::OopStore) { |
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7032963: StoreCM shouldn't participate in store elimination
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diff
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|
2448 // Hasn't been processed by this code yet. |
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diff
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|
2449 n->add_prec(mem->in(MemNode::OopStore)); |
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diff
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|
2450 } else { |
e6beb62de02d
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diff
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|
2451 // Already converted to precedence edge |
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7032963: StoreCM shouldn't participate in store elimination
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diff
changeset
|
2452 for (uint i = mem->req(); i < mem->len(); i++) { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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2376
diff
changeset
|
2453 // Accumulate any precedence edges |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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parents:
2376
diff
changeset
|
2454 if (mem->in(i) != NULL) { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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parents:
2376
diff
changeset
|
2455 n->add_prec(mem->in(i)); |
e6beb62de02d
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parents:
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diff
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|
2456 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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diff
changeset
|
2457 } |
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diff
changeset
|
2458 // Everything above this point has been processed. |
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7032963: StoreCM shouldn't participate in store elimination
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parents:
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diff
changeset
|
2459 done = true; |
e6beb62de02d
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diff
changeset
|
2460 } |
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7032963: StoreCM shouldn't participate in store elimination
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diff
changeset
|
2461 // Eliminate the previous StoreCM |
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7032963: StoreCM shouldn't participate in store elimination
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parents:
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diff
changeset
|
2462 prev->set_req(MemNode::Memory, mem->in(MemNode::Memory)); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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parents:
2376
diff
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|
2463 assert(mem->outcnt() == 0, "should be dead"); |
7196
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6888
diff
changeset
|
2464 mem->disconnect_inputs(NULL, this); |
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2465 } else { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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parents:
2376
diff
changeset
|
2466 prev = mem; |
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7032963: StoreCM shouldn't participate in store elimination
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parents:
2376
diff
changeset
|
2467 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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parents:
2376
diff
changeset
|
2468 mem = prev->in(MemNode::Memory); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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parents:
2376
diff
changeset
|
2469 } |
e6beb62de02d
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parents:
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diff
changeset
|
2470 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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diff
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|
2471 } |
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diff
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|
2472 |
0 | 2473 //------------------------------final_graph_reshaping_impl---------------------- |
2474 // Implement items 1-5 from final_graph_reshaping below. | |
7196
2aff40cb4703
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bharadwaj
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6888
diff
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|
2475 void Compile::final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc) { |
0 | 2476 |
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
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164
diff
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|
2477 if ( n->outcnt() == 0 ) return; // dead node |
0 | 2478 uint nop = n->Opcode(); |
2479 | |
2480 // Check for 2-input instruction with "last use" on right input. | |
2481 // Swap to left input. Implements item (2). | |
2482 if( n->req() == 3 && // two-input instruction | |
2483 n->in(1)->outcnt() > 1 && // left use is NOT a last use | |
2484 (!n->in(1)->is_Phi() || n->in(1)->in(2) != n) && // it is not data loop | |
2485 n->in(2)->outcnt() == 1 &&// right use IS a last use | |
2486 !n->in(2)->is_Con() ) { // right use is not a constant | |
2487 // Check for commutative opcode | |
2488 switch( nop ) { | |
2489 case Op_AddI: case Op_AddF: case Op_AddD: case Op_AddL: | |
2490 case Op_MaxI: case Op_MinI: | |
2491 case Op_MulI: case Op_MulF: case Op_MulD: case Op_MulL: | |
2492 case Op_AndL: case Op_XorL: case Op_OrL: | |
2493 case Op_AndI: case Op_XorI: case Op_OrI: { | |
2494 // Move "last use" input to left by swapping inputs | |
2495 n->swap_edges(1, 2); | |
2496 break; | |
2497 } | |
2498 default: | |
2499 break; | |
2500 } | |
2501 } | |
2502 | |
1609 | 2503 #ifdef ASSERT |
2504 if( n->is_Mem() ) { | |
7196
2aff40cb4703
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bharadwaj
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6888
diff
changeset
|
2505 int alias_idx = get_alias_index(n->as_Mem()->adr_type()); |
1609 | 2506 assert( n->in(0) != NULL || alias_idx != Compile::AliasIdxRaw || |
2507 // oop will be recorded in oop map if load crosses safepoint | |
2508 n->is_Load() && (n->as_Load()->bottom_type()->isa_oopptr() || | |
2509 LoadNode::is_immutable_value(n->in(MemNode::Address))), | |
2510 "raw memory operations should have control edge"); | |
2511 } | |
2512 #endif | |
0 | 2513 // Count FPU ops and common calls, implements item (3) |
2514 switch( nop ) { | |
2515 // Count all float operations that may use FPU | |
2516 case Op_AddF: | |
2517 case Op_SubF: | |
2518 case Op_MulF: | |
2519 case Op_DivF: | |
2520 case Op_NegF: | |
2521 case Op_ModF: | |
2522 case Op_ConvI2F: | |
2523 case Op_ConF: | |
2524 case Op_CmpF: | |
2525 case Op_CmpF3: | |
2526 // case Op_ConvL2F: // longs are split into 32-bit halves | |
859
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6860599: nodes limit could be reached during Output phase
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856
diff
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|
2527 frc.inc_float_count(); |
0 | 2528 break; |
2529 | |
2530 case Op_ConvF2D: | |
2531 case Op_ConvD2F: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
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856
diff
changeset
|
2532 frc.inc_float_count(); |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
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856
diff
changeset
|
2533 frc.inc_double_count(); |
0 | 2534 break; |
2535 | |
2536 // Count all double operations that may use FPU | |
2537 case Op_AddD: | |
2538 case Op_SubD: | |
2539 case Op_MulD: | |
2540 case Op_DivD: | |
2541 case Op_NegD: | |
2542 case Op_ModD: | |
2543 case Op_ConvI2D: | |
2544 case Op_ConvD2I: | |
2545 // case Op_ConvL2D: // handled by leaf call | |
2546 // case Op_ConvD2L: // handled by leaf call | |
2547 case Op_ConD: | |
2548 case Op_CmpD: | |
2549 case Op_CmpD3: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
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diff
changeset
|
2550 frc.inc_double_count(); |
0 | 2551 break; |
2552 case Op_Opaque1: // Remove Opaque Nodes before matching | |
2553 case Op_Opaque2: // Remove Opaque Nodes before matching | |
7196
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bharadwaj
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6888
diff
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|
2554 n->subsume_by(n->in(1), this); |
0 | 2555 break; |
2556 case Op_CallStaticJava: | |
2557 case Op_CallJava: | |
2558 case Op_CallDynamicJava: | |
859
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6860599: nodes limit could be reached during Output phase
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diff
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|
2559 frc.inc_java_call_count(); // Count java call site; |
0 | 2560 case Op_CallRuntime: |
2561 case Op_CallLeaf: | |
2562 case Op_CallLeafNoFP: { | |
2563 assert( n->is_Call(), "" ); | |
2564 CallNode *call = n->as_Call(); | |
2565 // Count call sites where the FP mode bit would have to be flipped. | |
2566 // Do not count uncommon runtime calls: | |
2567 // uncommon_trap, _complete_monitor_locking, _complete_monitor_unlocking, | |
2568 // _new_Java, _new_typeArray, _new_objArray, _rethrow_Java, ... | |
2569 if( !call->is_CallStaticJava() || !call->as_CallStaticJava()->_name ) { | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
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856
diff
changeset
|
2570 frc.inc_call_count(); // Count the call site |
0 | 2571 } else { // See if uncommon argument is shared |
2572 Node *n = call->in(TypeFunc::Parms); | |
2573 int nop = n->Opcode(); | |
2574 // Clone shared simple arguments to uncommon calls, item (1). | |
2575 if( n->outcnt() > 1 && | |
2576 !n->is_Proj() && | |
2577 nop != Op_CreateEx && | |
2578 nop != Op_CheckCastPP && | |
331
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6706829: Compressed Oops: add debug info for narrow oops
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293
diff
changeset
|
2579 nop != Op_DecodeN && |
6848
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7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2580 nop != Op_DecodeNKlass && |
0 | 2581 !n->is_Mem() ) { |
2582 Node *x = n->clone(); | |
2583 call->set_req( TypeFunc::Parms, x ); | |
2584 } | |
2585 } | |
2586 break; | |
2587 } | |
2588 | |
2589 case Op_StoreD: | |
2590 case Op_LoadD: | |
2591 case Op_LoadD_unaligned: | |
859
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6860599: nodes limit could be reached during Output phase
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diff
changeset
|
2592 frc.inc_double_count(); |
0 | 2593 goto handle_mem; |
2594 case Op_StoreF: | |
2595 case Op_LoadF: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
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diff
changeset
|
2596 frc.inc_float_count(); |
0 | 2597 goto handle_mem; |
2598 | |
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2599 case Op_StoreCM: |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2600 { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
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diff
changeset
|
2601 // Convert OopStore dependence into precedence edge |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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parents:
2376
diff
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|
2602 Node* prec = n->in(MemNode::OopStore); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2603 n->del_req(MemNode::OopStore); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2604 n->add_prec(prec); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2605 eliminate_redundant_card_marks(n); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2606 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2607 |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2608 // fall through |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
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parents:
2376
diff
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|
2609 |
0 | 2610 case Op_StoreB: |
2611 case Op_StoreC: | |
2612 case Op_StorePConditional: | |
2613 case Op_StoreI: | |
2614 case Op_StoreL: | |
420
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
418
diff
changeset
|
2615 case Op_StoreIConditional: |
0 | 2616 case Op_StoreLConditional: |
2617 case Op_CompareAndSwapI: | |
2618 case Op_CompareAndSwapL: | |
2619 case Op_CompareAndSwapP: | |
113
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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100
diff
changeset
|
2620 case Op_CompareAndSwapN: |
6795
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2621 case Op_GetAndAddI: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2622 case Op_GetAndAddL: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2623 case Op_GetAndSetI: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2624 case Op_GetAndSetL: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2625 case Op_GetAndSetP: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2626 case Op_GetAndSetN: |
0 | 2627 case Op_StoreP: |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2628 case Op_StoreN: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2629 case Op_StoreNKlass: |
0 | 2630 case Op_LoadB: |
624 | 2631 case Op_LoadUB: |
558
3b5ac9e7e6ea
6796746: rename LoadC (char) opcode class to LoadUS (unsigned short)
twisti
parents:
492
diff
changeset
|
2632 case Op_LoadUS: |
0 | 2633 case Op_LoadI: |
2634 case Op_LoadKlass: | |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2635 case Op_LoadNKlass: |
0 | 2636 case Op_LoadL: |
2637 case Op_LoadL_unaligned: | |
2638 case Op_LoadPLocked: | |
2639 case Op_LoadP: | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2640 case Op_LoadN: |
0 | 2641 case Op_LoadRange: |
2642 case Op_LoadS: { | |
2643 handle_mem: | |
2644 #ifdef ASSERT | |
2645 if( VerifyOptoOopOffsets ) { | |
2646 assert( n->is_Mem(), "" ); | |
2647 MemNode *mem = (MemNode*)n; | |
2648 // Check to see if address types have grounded out somehow. | |
2649 const TypeInstPtr *tp = mem->in(MemNode::Address)->bottom_type()->isa_instptr(); | |
2650 assert( !tp || oop_offset_is_sane(tp), "" ); | |
2651 } | |
2652 #endif | |
2653 break; | |
2654 } | |
2655 | |
2656 case Op_AddP: { // Assert sane base pointers | |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2657 Node *addp = n->in(AddPNode::Address); |
0 | 2658 assert( !addp->is_AddP() || |
2659 addp->in(AddPNode::Base)->is_top() || // Top OK for allocation | |
2660 addp->in(AddPNode::Base) == n->in(AddPNode::Base), | |
2661 "Base pointers must match" ); | |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2662 #ifdef _LP64 |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12167
diff
changeset
|
2663 if ((UseCompressedOops || UseCompressedClassPointers) && |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2664 addp->Opcode() == Op_ConP && |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2665 addp == n->in(AddPNode::Base) && |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2666 n->in(AddPNode::Offset)->is_Con()) { |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2667 // Use addressing with narrow klass to load with offset on x86. |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2668 // On sparc loading 32-bits constant and decoding it have less |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2669 // instructions (4) then load 64-bits constant (7). |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2670 // Do this transformation here since IGVN will convert ConN back to ConP. |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2671 const Type* t = addp->bottom_type(); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2672 if (t->isa_oopptr() || t->isa_klassptr()) { |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2673 Node* nn = NULL; |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2674 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2675 int op = t->isa_oopptr() ? Op_ConN : Op_ConNKlass; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2676 |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2677 // Look for existing ConN node of the same exact type. |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2678 Node* r = root(); |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2679 uint cnt = r->outcnt(); |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2680 for (uint i = 0; i < cnt; i++) { |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2681 Node* m = r->raw_out(i); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2682 if (m!= NULL && m->Opcode() == op && |
221
1e026f8da827
6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
kvn
parents:
182
diff
changeset
|
2683 m->bottom_type()->make_ptr() == t) { |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2684 nn = m; |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2685 break; |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2686 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2687 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2688 if (nn != NULL) { |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2689 // Decode a narrow oop to match address |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2690 // [R12 + narrow_oop_reg<<3 + offset] |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2691 if (t->isa_oopptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2692 nn = new (this) DecodeNNode(nn, t); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2693 } else { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2694 nn = new (this) DecodeNKlassNode(nn, t); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2695 } |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2696 n->set_req(AddPNode::Base, nn); |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2697 n->set_req(AddPNode::Address, nn); |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2698 if (addp->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2699 addp->disconnect_inputs(NULL, this); |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2700 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2701 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2702 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2703 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2704 #endif |
0 | 2705 break; |
2706 } | |
2707 | |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2708 #ifdef _LP64 |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2709 case Op_CastPP: |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2710 if (n->in(1)->is_DecodeN() && Matcher::gen_narrow_oop_implicit_null_checks()) { |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2711 Node* in1 = n->in(1); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2712 const Type* t = n->bottom_type(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2713 Node* new_in1 = in1->clone(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2714 new_in1->as_DecodeN()->set_type(t); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2715 |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2716 if (!Matcher::narrow_oop_use_complex_address()) { |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2717 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2718 // x86, ARM and friends can handle 2 adds in addressing mode |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2719 // and Matcher can fold a DecodeN node into address by using |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2720 // a narrow oop directly and do implicit NULL check in address: |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2721 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2722 // [R12 + narrow_oop_reg<<3 + offset] |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2723 // NullCheck narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2724 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2725 // On other platforms (Sparc) we have to keep new DecodeN node and |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2726 // use it to do implicit NULL check in address: |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2727 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2728 // decode_not_null narrow_oop_reg, base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2729 // [base_reg + offset] |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2730 // NullCheck base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2731 // |
605 | 2732 // Pin the new DecodeN node to non-null path on these platform (Sparc) |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2733 // to keep the information to which NULL check the new DecodeN node |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2734 // corresponds to use it as value in implicit_null_check(). |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2735 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2736 new_in1->set_req(0, n->in(0)); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2737 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2738 |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2739 n->subsume_by(new_in1, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2740 if (in1->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2741 in1->disconnect_inputs(NULL, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2742 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2743 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2744 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2745 |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2746 case Op_CmpP: |
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
164
diff
changeset
|
2747 // Do this transformation here to preserve CmpPNode::sub() and |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
164
diff
changeset
|
2748 // other TypePtr related Ideal optimizations (for example, ptr nullness). |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2749 if (n->in(1)->is_DecodeNarrowPtr() || n->in(2)->is_DecodeNarrowPtr()) { |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2750 Node* in1 = n->in(1); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2751 Node* in2 = n->in(2); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2752 if (!in1->is_DecodeNarrowPtr()) { |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2753 in2 = in1; |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2754 in1 = n->in(2); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2755 } |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2756 assert(in1->is_DecodeNarrowPtr(), "sanity"); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2757 |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2758 Node* new_in2 = NULL; |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2759 if (in2->is_DecodeNarrowPtr()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2760 assert(in2->Opcode() == in1->Opcode(), "must be same node type"); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2761 new_in2 = in2->in(1); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2762 } else if (in2->Opcode() == Op_ConP) { |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2763 const Type* t = in2->bottom_type(); |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2764 if (t == TypePtr::NULL_PTR) { |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2765 assert(in1->is_DecodeN(), "compare klass to null?"); |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2766 // Don't convert CmpP null check into CmpN if compressed |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2767 // oops implicit null check is not generated. |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2768 // This will allow to generate normal oop implicit null check. |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2769 if (Matcher::gen_narrow_oop_implicit_null_checks()) |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2770 new_in2 = ConNode::make(this, TypeNarrowOop::NULL_PTR); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2771 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2772 // This transformation together with CastPP transformation above |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2773 // will generated code for implicit NULL checks for compressed oops. |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2774 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2775 // The original code after Optimize() |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2776 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2777 // LoadN memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2778 // decode narrow_oop_reg, base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2779 // CmpP base_reg, NULL |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2780 // CastPP base_reg // NotNull |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2781 // Load [base_reg + offset], val_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2782 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2783 // after these transformations will be |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2784 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2785 // LoadN memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2786 // CmpN narrow_oop_reg, NULL |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2787 // decode_not_null narrow_oop_reg, base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2788 // Load [base_reg + offset], val_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2789 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2790 // and the uncommon path (== NULL) will use narrow_oop_reg directly |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2791 // since narrow oops can be used in debug info now (see the code in |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2792 // final_graph_reshaping_walk()). |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2793 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2794 // At the end the code will be matched to |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2795 // on x86: |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2796 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2797 // Load_narrow_oop memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2798 // Load [R12 + narrow_oop_reg<<3 + offset], val_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2799 // NullCheck narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2800 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2801 // and on sparc: |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2802 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2803 // Load_narrow_oop memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2804 // decode_not_null narrow_oop_reg, base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2805 // Load [base_reg + offset], val_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2806 // NullCheck base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2807 // |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2808 } else if (t->isa_oopptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2809 new_in2 = ConNode::make(this, t->make_narrowoop()); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2810 } else if (t->isa_klassptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2811 new_in2 = ConNode::make(this, t->make_narrowklass()); |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2812 } |
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2813 } |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2814 if (new_in2 != NULL) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2815 Node* cmpN = new (this) CmpNNode(in1->in(1), new_in2); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2816 n->subsume_by(cmpN, this); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2817 if (in1->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2818 in1->disconnect_inputs(NULL, this); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2819 } |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2820 if (in2->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2821 in2->disconnect_inputs(NULL, this); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2822 } |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2823 } |
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2824 } |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
253
diff
changeset
|
2825 break; |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2826 |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2827 case Op_DecodeN: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2828 case Op_DecodeNKlass: |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2829 assert(!n->in(1)->is_EncodeNarrowPtr(), "should be optimized out"); |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2830 // DecodeN could be pinned when it can't be fold into |
492
5496e074077f
6787050: assert(n->in(0) == 0L,"no control") with UseCompressedOops on sparcv9
kvn
parents:
490
diff
changeset
|
2831 // an address expression, see the code for Op_CastPP above. |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2832 assert(n->in(0) == NULL || (UseCompressedOops && !Matcher::narrow_oop_use_complex_address()), "no control"); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2833 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2834 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2835 case Op_EncodeP: |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2836 case Op_EncodePKlass: { |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2837 Node* in1 = n->in(1); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2838 if (in1->is_DecodeNarrowPtr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2839 n->subsume_by(in1->in(1), this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2840 } else if (in1->Opcode() == Op_ConP) { |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2841 const Type* t = in1->bottom_type(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2842 if (t == TypePtr::NULL_PTR) { |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2843 assert(t->isa_oopptr(), "null klass?"); |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2844 n->subsume_by(ConNode::make(this, TypeNarrowOop::NULL_PTR), this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2845 } else if (t->isa_oopptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2846 n->subsume_by(ConNode::make(this, t->make_narrowoop()), this); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2847 } else if (t->isa_klassptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2848 n->subsume_by(ConNode::make(this, t->make_narrowklass()), this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2849 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2850 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2851 if (in1->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2852 in1->disconnect_inputs(NULL, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2853 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2854 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2855 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2856 |
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2857 case Op_Proj: { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2858 if (OptimizeStringConcat) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2859 ProjNode* p = n->as_Proj(); |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2860 if (p->_is_io_use) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2861 // Separate projections were used for the exception path which |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2862 // are normally removed by a late inline. If it wasn't inlined |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2863 // then they will hang around and should just be replaced with |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2864 // the original one. |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2865 Node* proj = NULL; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2866 // Replace with just one |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2867 for (SimpleDUIterator i(p->in(0)); i.has_next(); i.next()) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2868 Node *use = i.get(); |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2869 if (use->is_Proj() && p != use && use->as_Proj()->_con == p->_con) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2870 proj = use; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2871 break; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2872 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2873 } |
4767 | 2874 assert(proj != NULL, "must be found"); |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2875 p->subsume_by(proj, this); |
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2876 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2877 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2878 break; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2879 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2880 |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2881 case Op_Phi: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2882 if (n->as_Phi()->bottom_type()->isa_narrowoop() || n->as_Phi()->bottom_type()->isa_narrowklass()) { |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2883 // The EncodeP optimization may create Phi with the same edges |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2884 // for all paths. It is not handled well by Register Allocator. |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2885 Node* unique_in = n->in(1); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2886 assert(unique_in != NULL, ""); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2887 uint cnt = n->req(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2888 for (uint i = 2; i < cnt; i++) { |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2889 Node* m = n->in(i); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2890 assert(m != NULL, ""); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2891 if (unique_in != m) |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2892 unique_in = NULL; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2893 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2894 if (unique_in != NULL) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2895 n->subsume_by(unique_in, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2896 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2897 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2898 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2899 |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2900 #endif |
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2901 |
0 | 2902 case Op_ModI: |
2903 if (UseDivMod) { | |
2904 // Check if a%b and a/b both exist | |
2905 Node* d = n->find_similar(Op_DivI); | |
2906 if (d) { | |
2907 // Replace them with a fused divmod if supported | |
2908 if (Matcher::has_match_rule(Op_DivModI)) { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2909 DivModINode* divmod = DivModINode::make(this, n); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2910 d->subsume_by(divmod->div_proj(), this); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2911 n->subsume_by(divmod->mod_proj(), this); |
0 | 2912 } else { |
2913 // replace a%b with a-((a/b)*b) | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2914 Node* mult = new (this) MulINode(d, d->in(2)); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2915 Node* sub = new (this) SubINode(d->in(1), mult); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2916 n->subsume_by(sub, this); |
0 | 2917 } |
2918 } | |
2919 } | |
2920 break; | |
2921 | |
2922 case Op_ModL: | |
2923 if (UseDivMod) { | |
2924 // Check if a%b and a/b both exist | |
2925 Node* d = n->find_similar(Op_DivL); | |
2926 if (d) { | |
2927 // Replace them with a fused divmod if supported | |
2928 if (Matcher::has_match_rule(Op_DivModL)) { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2929 DivModLNode* divmod = DivModLNode::make(this, n); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2930 d->subsume_by(divmod->div_proj(), this); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2931 n->subsume_by(divmod->mod_proj(), this); |
0 | 2932 } else { |
2933 // replace a%b with a-((a/b)*b) | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2934 Node* mult = new (this) MulLNode(d, d->in(2)); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2935 Node* sub = new (this) SubLNode(d->in(1), mult); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2936 n->subsume_by(sub, this); |
0 | 2937 } |
2938 } | |
2939 } | |
2940 break; | |
2941 | |
6179
8c92982cbbc4
7119644: Increase superword's vector size up to 256 bits
kvn
parents:
6143
diff
changeset
|
2942 case Op_LoadVector: |
8c92982cbbc4
7119644: Increase superword's vector size up to 256 bits
kvn
parents:
6143
diff
changeset
|
2943 case Op_StoreVector: |
0 | 2944 break; |
2945 | |
2946 case Op_PackB: | |
2947 case Op_PackS: | |
2948 case Op_PackI: | |
2949 case Op_PackF: | |
2950 case Op_PackL: | |
2951 case Op_PackD: | |
2952 if (n->req()-1 > 2) { | |
2953 // Replace many operand PackNodes with a binary tree for matching | |
2954 PackNode* p = (PackNode*) n; | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2955 Node* btp = p->binary_tree_pack(this, 1, n->req()); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2956 n->subsume_by(btp, this); |
0 | 2957 } |
2958 break; | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2959 case Op_Loop: |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2960 case Op_CountedLoop: |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2961 if (n->as_Loop()->is_inner_loop()) { |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2962 frc.inc_inner_loop_count(); |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2963 } |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2964 break; |
2401
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2965 case Op_LShiftI: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2966 case Op_RShiftI: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2967 case Op_URShiftI: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2968 case Op_LShiftL: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2969 case Op_RShiftL: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2970 case Op_URShiftL: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2971 if (Matcher::need_masked_shift_count) { |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2972 // The cpu's shift instructions don't restrict the count to the |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2973 // lower 5/6 bits. We need to do the masking ourselves. |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2974 Node* in2 = n->in(2); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2975 juint mask = (n->bottom_type() == TypeInt::INT) ? (BitsPerInt - 1) : (BitsPerLong - 1); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2976 const TypeInt* t = in2->find_int_type(); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2977 if (t != NULL && t->is_con()) { |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2978 juint shift = t->get_con(); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2979 if (shift > mask) { // Unsigned cmp |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2980 n->set_req(2, ConNode::make(this, TypeInt::make(shift & mask))); |
2401
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2981 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2982 } else { |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2983 if (t == NULL || t->_lo < 0 || t->_hi > (int)mask) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2984 Node* shift = new (this) AndINode(in2, ConNode::make(this, TypeInt::make(mask))); |
2401
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2985 n->set_req(2, shift); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2986 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2987 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2988 if (in2->outcnt() == 0) { // Remove dead node |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2989 in2->disconnect_inputs(NULL, this); |
2401
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2990 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2991 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2992 break; |
8694
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
2993 case Op_MemBarStoreStore: |
10278 | 2994 case Op_MemBarRelease: |
8694
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
2995 // Break the link with AllocateNode: it is no longer useful and |
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
2996 // confuses register allocation. |
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
2997 if (n->req() > MemBarNode::Precedent) { |
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
2998 n->set_req(MemBarNode::Precedent, top()); |
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
2999 } |
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3000 break; |
12888
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3001 // Must set a control edge on all nodes that produce a FlagsProj |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3002 // so they can't escape the block that consumes the flags. |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3003 // Must also set the non throwing branch as the control |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3004 // for all nodes that depends on the result. Unless the node |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3005 // already have a control that isn't the control of the |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3006 // flag producer |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3007 case Op_FlagsProj: |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3008 { |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3009 MathExactNode* math = (MathExactNode*) n->in(0); |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3010 Node* ctrl = math->control_node(); |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3011 Node* non_throwing = math->non_throwing_branch(); |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3012 math->set_req(0, ctrl); |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3013 |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3014 Node* result = math->result_node(); |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3015 if (result != NULL) { |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3016 for (DUIterator_Fast jmax, j = result->fast_outs(jmax); j < jmax; j++) { |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3017 Node* out = result->fast_out(j); |
12963
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3018 // Phi nodes shouldn't be moved. They would only match below if they |
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3019 // had the same control as the MathExactNode. The only time that |
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3020 // would happen is if the Phi is also an input to the MathExact |
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3021 if (!out->is_Phi()) { |
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3022 if (out->in(0) == NULL) { |
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3023 out->set_req(0, non_throwing); |
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3024 } else if (out->in(0) == ctrl) { |
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3025 out->set_req(0, non_throwing); |
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3026 } |
12888
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3027 } |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3028 } |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3029 } |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3030 } |
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3031 break; |
0 | 3032 default: |
3033 assert( !n->is_Call(), "" ); | |
3034 assert( !n->is_Mem(), "" ); | |
3035 break; | |
3036 } | |
127 | 3037 |
3038 // Collect CFG split points | |
3039 if (n->is_MultiBranch()) | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3040 frc._tests.push(n); |
0 | 3041 } |
3042 | |
3043 //------------------------------final_graph_reshaping_walk--------------------- | |
3044 // Replacing Opaque nodes with their input in final_graph_reshaping_impl(), | |
3045 // requires that the walk visits a node's inputs before visiting the node. | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3046 void Compile::final_graph_reshaping_walk( Node_Stack &nstack, Node *root, Final_Reshape_Counts &frc ) { |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3047 ResourceArea *area = Thread::current()->resource_area(); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3048 Unique_Node_List sfpt(area); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3049 |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3050 frc._visited.set(root->_idx); // first, mark node as visited |
0 | 3051 uint cnt = root->req(); |
3052 Node *n = root; | |
3053 uint i = 0; | |
3054 while (true) { | |
3055 if (i < cnt) { | |
3056 // Place all non-visited non-null inputs onto stack | |
3057 Node* m = n->in(i); | |
3058 ++i; | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3059 if (m != NULL && !frc._visited.test_set(m->_idx)) { |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3060 if (m->is_SafePoint() && m->as_SafePoint()->jvms() != NULL) |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3061 sfpt.push(m); |
0 | 3062 cnt = m->req(); |
3063 nstack.push(n, i); // put on stack parent and next input's index | |
3064 n = m; | |
3065 i = 0; | |
3066 } | |
3067 } else { | |
3068 // Now do post-visit work | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3069 final_graph_reshaping_impl( n, frc ); |
0 | 3070 if (nstack.is_empty()) |
3071 break; // finished | |
3072 n = nstack.node(); // Get node from stack | |
3073 cnt = n->req(); | |
3074 i = nstack.index(); | |
3075 nstack.pop(); // Shift to the next node on stack | |
3076 } | |
3077 } | |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3078 |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
3079 // Skip next transformation if compressed oops are not used. |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
3080 if ((UseCompressedOops && !Matcher::gen_narrow_oop_implicit_null_checks()) || |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12167
diff
changeset
|
3081 (!UseCompressedOops && !UseCompressedClassPointers)) |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
3082 return; |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
3083 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
3084 // Go over safepoints nodes to skip DecodeN/DecodeNKlass nodes for debug edges. |
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3085 // It could be done for an uncommon traps or any safepoints/calls |
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3086 // if the DecodeN/DecodeNKlass node is referenced only in a debug info. |
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3087 while (sfpt.size() > 0) { |
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3088 n = sfpt.pop(); |
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3089 JVMState *jvms = n->as_SafePoint()->jvms(); |
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3090 assert(jvms != NULL, "sanity"); |
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3091 int start = jvms->debug_start(); |
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3092 int end = n->req(); |
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3093 bool is_uncommon = (n->is_CallStaticJava() && |
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3094 n->as_CallStaticJava()->uncommon_trap_request() != 0); |
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3095 for (int j = start; j < end; j++) { |
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3096 Node* in = n->in(j); |
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3097 if (in->is_DecodeNarrowPtr()) { |
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3098 bool safe_to_skip = true; |
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3099 if (!is_uncommon ) { |
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3100 // Is it safe to skip? |
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3101 for (uint i = 0; i < in->outcnt(); i++) { |
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3102 Node* u = in->raw_out(i); |
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3103 if (!u->is_SafePoint() || |
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3104 u->is_Call() && u->as_Call()->has_non_debug_use(n)) { |
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3105 safe_to_skip = false; |
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3106 } |
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3107 } |
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3108 } |
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3109 if (safe_to_skip) { |
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3110 n->set_req(j, in->in(1)); |
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3111 } |
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3112 if (in->outcnt() == 0) { |
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3113 in->disconnect_inputs(NULL, this); |
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3114 } |
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3115 } |
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3116 } |
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3117 } |
0 | 3118 } |
3119 | |
3120 //------------------------------final_graph_reshaping-------------------------- | |
3121 // Final Graph Reshaping. | |
3122 // | |
3123 // (1) Clone simple inputs to uncommon calls, so they can be scheduled late | |
3124 // and not commoned up and forced early. Must come after regular | |
3125 // optimizations to avoid GVN undoing the cloning. Clone constant | |
3126 // inputs to Loop Phis; these will be split by the allocator anyways. | |
3127 // Remove Opaque nodes. | |
3128 // (2) Move last-uses by commutative operations to the left input to encourage | |
3129 // Intel update-in-place two-address operations and better register usage | |
3130 // on RISCs. Must come after regular optimizations to avoid GVN Ideal | |
3131 // calls canonicalizing them back. | |
3132 // (3) Count the number of double-precision FP ops, single-precision FP ops | |
3133 // and call sites. On Intel, we can get correct rounding either by | |
3134 // forcing singles to memory (requires extra stores and loads after each | |
3135 // FP bytecode) or we can set a rounding mode bit (requires setting and | |
3136 // clearing the mode bit around call sites). The mode bit is only used | |
3137 // if the relative frequency of single FP ops to calls is low enough. | |
3138 // This is a key transform for SPEC mpeg_audio. | |
3139 // (4) Detect infinite loops; blobs of code reachable from above but not | |
3140 // below. Several of the Code_Gen algorithms fail on such code shapes, | |
3141 // so we simply bail out. Happens a lot in ZKM.jar, but also happens | |
3142 // from time to time in other codes (such as -Xcomp finalizer loops, etc). | |
3143 // Detection is by looking for IfNodes where only 1 projection is | |
3144 // reachable from below or CatchNodes missing some targets. | |
3145 // (5) Assert for insane oop offsets in debug mode. | |
3146 | |
3147 bool Compile::final_graph_reshaping() { | |
3148 // an infinite loop may have been eliminated by the optimizer, | |
3149 // in which case the graph will be empty. | |
3150 if (root()->req() == 1) { | |
3151 record_method_not_compilable("trivial infinite loop"); | |
3152 return true; | |
3153 } | |
3154 | |
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3155 // Expensive nodes have their control input set to prevent the GVN |
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3156 // from freely commoning them. There's no GVN beyond this point so |
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3157 // no need to keep the control input. We want the expensive nodes to |
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3158 // be freely moved to the least frequent code path by gcm. |
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3159 assert(OptimizeExpensiveOps || expensive_count() == 0, "optimization off but list non empty?"); |
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3160 for (int i = 0; i < expensive_count(); i++) { |
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3161 _expensive_nodes->at(i)->set_req(0, NULL); |
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3162 } |
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3163 |
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3164 Final_Reshape_Counts frc; |
0 | 3165 |
3166 // Visit everybody reachable! | |
3167 // Allocate stack of size C->unique()/2 to avoid frequent realloc | |
3168 Node_Stack nstack(unique() >> 1); | |
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3169 final_graph_reshaping_walk(nstack, root(), frc); |
0 | 3170 |
3171 // Check for unreachable (from below) code (i.e., infinite loops). | |
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3172 for( uint i = 0; i < frc._tests.size(); i++ ) { |
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3173 MultiBranchNode *n = frc._tests[i]->as_MultiBranch(); |
127 | 3174 // Get number of CFG targets. |
0 | 3175 // Note that PCTables include exception targets after calls. |
127 | 3176 uint required_outcnt = n->required_outcnt(); |
3177 if (n->outcnt() != required_outcnt) { | |
0 | 3178 // Check for a few special cases. Rethrow Nodes never take the |
3179 // 'fall-thru' path, so expected kids is 1 less. | |
3180 if (n->is_PCTable() && n->in(0) && n->in(0)->in(0)) { | |
3181 if (n->in(0)->in(0)->is_Call()) { | |
3182 CallNode *call = n->in(0)->in(0)->as_Call(); | |
3183 if (call->entry_point() == OptoRuntime::rethrow_stub()) { | |
127 | 3184 required_outcnt--; // Rethrow always has 1 less kid |
0 | 3185 } else if (call->req() > TypeFunc::Parms && |
3186 call->is_CallDynamicJava()) { | |
3187 // Check for null receiver. In such case, the optimizer has | |
3188 // detected that the virtual call will always result in a null | |
3189 // pointer exception. The fall-through projection of this CatchNode | |
3190 // will not be populated. | |
3191 Node *arg0 = call->in(TypeFunc::Parms); | |
3192 if (arg0->is_Type() && | |
3193 arg0->as_Type()->type()->higher_equal(TypePtr::NULL_PTR)) { | |
127 | 3194 required_outcnt--; |
0 | 3195 } |
3196 } else if (call->entry_point() == OptoRuntime::new_array_Java() && | |
3197 call->req() > TypeFunc::Parms+1 && | |
3198 call->is_CallStaticJava()) { | |
3199 // Check for negative array length. In such case, the optimizer has | |
3200 // detected that the allocation attempt will always result in an | |
3201 // exception. There is no fall-through projection of this CatchNode . | |
3202 Node *arg1 = call->in(TypeFunc::Parms+1); | |
3203 if (arg1->is_Type() && | |
3204 arg1->as_Type()->type()->join(TypeInt::POS)->empty()) { | |
127 | 3205 required_outcnt--; |
0 | 3206 } |
3207 } | |
3208 } | |
3209 } | |
127 | 3210 // Recheck with a better notion of 'required_outcnt' |
3211 if (n->outcnt() != required_outcnt) { | |
0 | 3212 record_method_not_compilable("malformed control flow"); |
3213 return true; // Not all targets reachable! | |
3214 } | |
3215 } | |
3216 // Check that I actually visited all kids. Unreached kids | |
3217 // must be infinite loops. | |
3218 for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) | |
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3219 if (!frc._visited.test(n->fast_out(j)->_idx)) { |
0 | 3220 record_method_not_compilable("infinite loop"); |
3221 return true; // Found unvisited kid; must be unreach | |
3222 } | |
3223 } | |
3224 | |
3225 // If original bytecodes contained a mixture of floats and doubles | |
3226 // check if the optimizer has made it homogenous, item (3). | |
929
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3227 if( Use24BitFPMode && Use24BitFP && UseSSE == 0 && |
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3228 frc.get_float_count() > 32 && |
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3229 frc.get_double_count() == 0 && |
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3230 (10 * frc.get_call_count() < frc.get_float_count()) ) { |
0 | 3231 set_24_bit_selection_and_mode( false, true ); |
3232 } | |
3233 | |
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3234 set_java_calls(frc.get_java_call_count()); |
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3235 set_inner_loops(frc.get_inner_loop_count()); |
0 | 3236 |
3237 // No infinite loops, no reason to bail out. | |
3238 return false; | |
3239 } | |
3240 | |
3241 //-----------------------------too_many_traps---------------------------------- | |
3242 // Report if there are too many traps at the current method and bci. | |
3243 // Return true if there was a trap, and/or PerMethodTrapLimit is exceeded. | |
3244 bool Compile::too_many_traps(ciMethod* method, | |
3245 int bci, | |
3246 Deoptimization::DeoptReason reason) { | |
3247 ciMethodData* md = method->method_data(); | |
3248 if (md->is_empty()) { | |
3249 // Assume the trap has not occurred, or that it occurred only | |
3250 // because of a transient condition during start-up in the interpreter. | |
3251 return false; | |
3252 } | |
3253 if (md->has_trap_at(bci, reason) != 0) { | |
3254 // Assume PerBytecodeTrapLimit==0, for a more conservative heuristic. | |
3255 // Also, if there are multiple reasons, or if there is no per-BCI record, | |
3256 // assume the worst. | |
3257 if (log()) | |
3258 log()->elem("observe trap='%s' count='%d'", | |
3259 Deoptimization::trap_reason_name(reason), | |
3260 md->trap_count(reason)); | |
3261 return true; | |
3262 } else { | |
3263 // Ignore method/bci and see if there have been too many globally. | |
3264 return too_many_traps(reason, md); | |
3265 } | |
3266 } | |
3267 | |
3268 // Less-accurate variant which does not require a method and bci. | |
3269 bool Compile::too_many_traps(Deoptimization::DeoptReason reason, | |
3270 ciMethodData* logmd) { | |
3271 if (trap_count(reason) >= (uint)PerMethodTrapLimit) { | |
3272 // Too many traps globally. | |
3273 // Note that we use cumulative trap_count, not just md->trap_count. | |
3274 if (log()) { | |
3275 int mcount = (logmd == NULL)? -1: (int)logmd->trap_count(reason); | |
3276 log()->elem("observe trap='%s' count='0' mcount='%d' ccount='%d'", | |
3277 Deoptimization::trap_reason_name(reason), | |
3278 mcount, trap_count(reason)); | |
3279 } | |
3280 return true; | |
3281 } else { | |
3282 // The coast is clear. | |
3283 return false; | |
3284 } | |
3285 } | |
3286 | |
3287 //--------------------------too_many_recompiles-------------------------------- | |
3288 // Report if there are too many recompiles at the current method and bci. | |
3289 // Consults PerBytecodeRecompilationCutoff and PerMethodRecompilationCutoff. | |
3290 // Is not eager to return true, since this will cause the compiler to use | |
3291 // Action_none for a trap point, to avoid too many recompilations. | |
3292 bool Compile::too_many_recompiles(ciMethod* method, | |
3293 int bci, | |
3294 Deoptimization::DeoptReason reason) { | |
3295 ciMethodData* md = method->method_data(); | |
3296 if (md->is_empty()) { | |
3297 // Assume the trap has not occurred, or that it occurred only | |
3298 // because of a transient condition during start-up in the interpreter. | |
3299 return false; | |
3300 } | |
3301 // Pick a cutoff point well within PerBytecodeRecompilationCutoff. | |
3302 uint bc_cutoff = (uint) PerBytecodeRecompilationCutoff / 8; | |
3303 uint m_cutoff = (uint) PerMethodRecompilationCutoff / 2 + 1; // not zero | |
3304 Deoptimization::DeoptReason per_bc_reason | |
3305 = Deoptimization::reason_recorded_per_bytecode_if_any(reason); | |
3306 if ((per_bc_reason == Deoptimization::Reason_none | |
3307 || md->has_trap_at(bci, reason) != 0) | |
3308 // The trap frequency measure we care about is the recompile count: | |
3309 && md->trap_recompiled_at(bci) | |
3310 && md->overflow_recompile_count() >= bc_cutoff) { | |
3311 // Do not emit a trap here if it has already caused recompilations. | |
3312 // Also, if there are multiple reasons, or if there is no per-BCI record, | |
3313 // assume the worst. | |
3314 if (log()) | |
3315 log()->elem("observe trap='%s recompiled' count='%d' recompiles2='%d'", | |
3316 Deoptimization::trap_reason_name(reason), | |
3317 md->trap_count(reason), | |
3318 md->overflow_recompile_count()); | |
3319 return true; | |
3320 } else if (trap_count(reason) != 0 | |
3321 && decompile_count() >= m_cutoff) { | |
3322 // Too many recompiles globally, and we have seen this sort of trap. | |
3323 // Use cumulative decompile_count, not just md->decompile_count. | |
3324 if (log()) | |
3325 log()->elem("observe trap='%s' count='%d' mcount='%d' decompiles='%d' mdecompiles='%d'", | |
3326 Deoptimization::trap_reason_name(reason), | |
3327 md->trap_count(reason), trap_count(reason), | |
3328 md->decompile_count(), decompile_count()); | |
3329 return true; | |
3330 } else { | |
3331 // The coast is clear. | |
3332 return false; | |
3333 } | |
3334 } | |
3335 | |
3336 | |
3337 #ifndef PRODUCT | |
3338 //------------------------------verify_graph_edges--------------------------- | |
3339 // Walk the Graph and verify that there is a one-to-one correspondence | |
3340 // between Use-Def edges and Def-Use edges in the graph. | |
3341 void Compile::verify_graph_edges(bool no_dead_code) { | |
3342 if (VerifyGraphEdges) { | |
3343 ResourceArea *area = Thread::current()->resource_area(); | |
3344 Unique_Node_List visited(area); | |
3345 // Call recursive graph walk to check edges | |
3346 _root->verify_edges(visited); | |
3347 if (no_dead_code) { | |
3348 // Now make sure that no visited node is used by an unvisited node. | |
3349 bool dead_nodes = 0; | |
3350 Unique_Node_List checked(area); | |
3351 while (visited.size() > 0) { | |
3352 Node* n = visited.pop(); | |
3353 checked.push(n); | |
3354 for (uint i = 0; i < n->outcnt(); i++) { | |
3355 Node* use = n->raw_out(i); | |
3356 if (checked.member(use)) continue; // already checked | |
3357 if (visited.member(use)) continue; // already in the graph | |
3358 if (use->is_Con()) continue; // a dead ConNode is OK | |
3359 // At this point, we have found a dead node which is DU-reachable. | |
3360 if (dead_nodes++ == 0) | |
3361 tty->print_cr("*** Dead nodes reachable via DU edges:"); | |
3362 use->dump(2); | |
3363 tty->print_cr("---"); | |
3364 checked.push(use); // No repeats; pretend it is now checked. | |
3365 } | |
3366 } | |
3367 assert(dead_nodes == 0, "using nodes must be reachable from root"); | |
3368 } | |
3369 } | |
3370 } | |
3371 #endif | |
3372 | |
3373 // The Compile object keeps track of failure reasons separately from the ciEnv. | |
3374 // This is required because there is not quite a 1-1 relation between the | |
3375 // ciEnv and its compilation task and the Compile object. Note that one | |
3376 // ciEnv might use two Compile objects, if C2Compiler::compile_method decides | |
3377 // to backtrack and retry without subsuming loads. Other than this backtracking | |
3378 // behavior, the Compile's failure reason is quietly copied up to the ciEnv | |
3379 // by the logic in C2Compiler. | |
3380 void Compile::record_failure(const char* reason) { | |
3381 if (log() != NULL) { | |
3382 log()->elem("failure reason='%s' phase='compile'", reason); | |
3383 } | |
3384 if (_failure_reason == NULL) { | |
3385 // Record the first failure reason. | |
3386 _failure_reason = reason; | |
3387 } | |
10405 | 3388 |
3389 EventCompilerFailure event; | |
3390 if (event.should_commit()) { | |
3391 event.set_compileID(Compile::compile_id()); | |
3392 event.set_failure(reason); | |
3393 event.commit(); | |
3394 } | |
3395 | |
222 | 3396 if (!C->failure_reason_is(C2Compiler::retry_no_subsuming_loads())) { |
10405 | 3397 C->print_method(PHASE_FAILURE); |
222 | 3398 } |
0 | 3399 _root = NULL; // flush the graph, too |
3400 } | |
3401 | |
3402 Compile::TracePhase::TracePhase(const char* name, elapsedTimer* accumulator, bool dolog) | |
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3403 : TraceTime(NULL, accumulator, false NOT_PRODUCT( || TimeCompiler ), false), |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3404 _phase_name(name), _dolog(dolog) |
0 | 3405 { |
3406 if (dolog) { | |
3407 C = Compile::current(); | |
3408 _log = C->log(); | |
3409 } else { | |
3410 C = NULL; | |
3411 _log = NULL; | |
3412 } | |
3413 if (_log != NULL) { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3414 _log->begin_head("phase name='%s' nodes='%d' live='%d'", _phase_name, C->unique(), C->live_nodes()); |
0 | 3415 _log->stamp(); |
3416 _log->end_head(); | |
3417 } | |
3418 } | |
3419 | |
3420 Compile::TracePhase::~TracePhase() { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3421 |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3422 C = Compile::current(); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3423 if (_dolog) { |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3424 _log = C->log(); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3425 } else { |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3426 _log = NULL; |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3427 } |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3428 |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3429 #ifdef ASSERT |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3430 if (PrintIdealNodeCount) { |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3431 tty->print_cr("phase name='%s' nodes='%d' live='%d' live_graph_walk='%d'", |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3432 _phase_name, C->unique(), C->live_nodes(), C->count_live_nodes_by_graph_walk()); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3433 } |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3434 |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3435 if (VerifyIdealNodeCount) { |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3436 Compile::current()->print_missing_nodes(); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3437 } |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3438 #endif |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3439 |
0 | 3440 if (_log != NULL) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3441 _log->done("phase name='%s' nodes='%d' live='%d'", _phase_name, C->unique(), C->live_nodes()); |
0 | 3442 } |
3443 } | |
2008 | 3444 |
3445 //============================================================================= | |
3446 // Two Constant's are equal when the type and the value are equal. | |
3447 bool Compile::Constant::operator==(const Constant& other) { | |
3448 if (type() != other.type() ) return false; | |
3449 if (can_be_reused() != other.can_be_reused()) return false; | |
3450 // For floating point values we compare the bit pattern. | |
3451 switch (type()) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3452 case T_FLOAT: return (_v._value.i == other._v._value.i); |
2008 | 3453 case T_LONG: |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3454 case T_DOUBLE: return (_v._value.j == other._v._value.j); |
2008 | 3455 case T_OBJECT: |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3456 case T_ADDRESS: return (_v._value.l == other._v._value.l); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3457 case T_VOID: return (_v._value.l == other._v._value.l); // jump-table entries |
6888
cfe522e6461c
8000623: tools/javac/Diagnostics/6769027/T6769027.java crashes in PSPromotionManager::copy_to_survivor_space
kvn
parents:
6849
diff
changeset
|
3458 case T_METADATA: return (_v._metadata == other._v._metadata); |
2008 | 3459 default: ShouldNotReachHere(); |
3460 } | |
3461 return false; | |
3462 } | |
3463 | |
3464 static int type_to_size_in_bytes(BasicType t) { | |
3465 switch (t) { | |
3466 case T_LONG: return sizeof(jlong ); | |
3467 case T_FLOAT: return sizeof(jfloat ); | |
3468 case T_DOUBLE: return sizeof(jdouble); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3469 case T_METADATA: return sizeof(Metadata*); |
2008 | 3470 // We use T_VOID as marker for jump-table entries (labels) which |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3471 // need an internal word relocation. |
2008 | 3472 case T_VOID: |
3473 case T_ADDRESS: | |
3474 case T_OBJECT: return sizeof(jobject); | |
3475 } | |
3476 | |
3477 ShouldNotReachHere(); | |
3478 return -1; | |
3479 } | |
3480 | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3481 int Compile::ConstantTable::qsort_comparator(Constant* a, Constant* b) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3482 // sort descending |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3483 if (a->freq() > b->freq()) return -1; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3484 if (a->freq() < b->freq()) return 1; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3485 return 0; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3486 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3487 |
2008 | 3488 void Compile::ConstantTable::calculate_offsets_and_size() { |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3489 // First, sort the array by frequencies. |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3490 _constants.sort(qsort_comparator); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3491 |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3492 #ifdef ASSERT |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3493 // Make sure all jump-table entries were sorted to the end of the |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3494 // array (they have a negative frequency). |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3495 bool found_void = false; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3496 for (int i = 0; i < _constants.length(); i++) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3497 Constant con = _constants.at(i); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3498 if (con.type() == T_VOID) |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3499 found_void = true; // jump-tables |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3500 else |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3501 assert(!found_void, "wrong sorting"); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3502 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3503 #endif |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3504 |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3505 int offset = 0; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3506 for (int i = 0; i < _constants.length(); i++) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3507 Constant* con = _constants.adr_at(i); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3508 |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3509 // Align offset for type. |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3510 int typesize = type_to_size_in_bytes(con->type()); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3511 offset = align_size_up(offset, typesize); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3512 con->set_offset(offset); // set constant's offset |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3513 |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3514 if (con->type() == T_VOID) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3515 MachConstantNode* n = (MachConstantNode*) con->get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3516 offset = offset + typesize * n->outcnt(); // expand jump-table |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3517 } else { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3518 offset = offset + typesize; |
2008 | 3519 } |
3520 } | |
3521 | |
3522 // Align size up to the next section start (which is insts; see | |
3523 // CodeBuffer::align_at_start). | |
3524 assert(_size == -1, "already set?"); | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3525 _size = align_size_up(offset, CodeEntryAlignment); |
2008 | 3526 } |
3527 | |
3528 void Compile::ConstantTable::emit(CodeBuffer& cb) { | |
3529 MacroAssembler _masm(&cb); | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3530 for (int i = 0; i < _constants.length(); i++) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3531 Constant con = _constants.at(i); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3532 address constant_addr; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3533 switch (con.type()) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3534 case T_LONG: constant_addr = _masm.long_constant( con.get_jlong() ); break; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3535 case T_FLOAT: constant_addr = _masm.float_constant( con.get_jfloat() ); break; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3536 case T_DOUBLE: constant_addr = _masm.double_constant(con.get_jdouble()); break; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3537 case T_OBJECT: { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3538 jobject obj = con.get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3539 int oop_index = _masm.oop_recorder()->find_index(obj); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3540 constant_addr = _masm.address_constant((address) obj, oop_Relocation::spec(oop_index)); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3541 break; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3542 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3543 case T_ADDRESS: { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3544 address addr = (address) con.get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3545 constant_addr = _masm.address_constant(addr); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3546 break; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3547 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3548 // We use T_VOID as marker for jump-table entries (labels) which |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3549 // need an internal word relocation. |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3550 case T_VOID: { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3551 MachConstantNode* n = (MachConstantNode*) con.get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3552 // Fill the jump-table with a dummy word. The real value is |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3553 // filled in later in fill_jump_table. |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3554 address dummy = (address) n; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3555 constant_addr = _masm.address_constant(dummy); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3556 // Expand jump-table |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3557 for (uint i = 1; i < n->outcnt(); i++) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3558 address temp_addr = _masm.address_constant(dummy + i); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3559 assert(temp_addr, "consts section too small"); |
2008 | 3560 } |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3561 break; |
2008 | 3562 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3563 case T_METADATA: { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3564 Metadata* obj = con.get_metadata(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3565 int metadata_index = _masm.oop_recorder()->find_index(obj); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3566 constant_addr = _masm.address_constant((address) obj, metadata_Relocation::spec(metadata_index)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3567 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3568 } |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3569 default: ShouldNotReachHere(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3570 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3571 assert(constant_addr, "consts section too small"); |
6268
6c5b7a6becc8
7187454: stack overflow in C2 compiler thread on Solaris x86
kvn
parents:
6179
diff
changeset
|
3572 assert((constant_addr - _masm.code()->consts()->start()) == con.offset(), err_msg_res("must be: %d == %d", constant_addr - _masm.code()->consts()->start(), con.offset())); |
2008 | 3573 } |
3574 } | |
3575 | |
3576 int Compile::ConstantTable::find_offset(Constant& con) const { | |
3577 int idx = _constants.find(con); | |
3578 assert(idx != -1, "constant must be in constant table"); | |
3579 int offset = _constants.at(idx).offset(); | |
3580 assert(offset != -1, "constant table not emitted yet?"); | |
3581 return offset; | |
3582 } | |
3583 | |
3584 void Compile::ConstantTable::add(Constant& con) { | |
3585 if (con.can_be_reused()) { | |
3586 int idx = _constants.find(con); | |
3587 if (idx != -1 && _constants.at(idx).can_be_reused()) { | |
4114
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7003454: order constants in constant table by number of references in code
twisti
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4064
diff
changeset
|
3588 _constants.adr_at(idx)->inc_freq(con.freq()); // increase the frequency by the current value |
2008 | 3589 return; |
3590 } | |
3591 } | |
3592 (void) _constants.append(con); | |
3593 } | |
3594 | |
4114
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7003454: order constants in constant table by number of references in code
twisti
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4064
diff
changeset
|
3595 Compile::Constant Compile::ConstantTable::add(MachConstantNode* n, BasicType type, jvalue value) { |
12023
d1034bd8cefc
8022284: Hide internal data structure in PhaseCFG
adlertz
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10405
diff
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|
3596 Block* b = Compile::current()->cfg()->get_block_for_node(n); |
4114
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7003454: order constants in constant table by number of references in code
twisti
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4064
diff
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|
3597 Constant con(type, value, b->_freq); |
2008 | 3598 add(con); |
3599 return con; | |
3600 } | |
3601 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6619
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|
3602 Compile::Constant Compile::ConstantTable::add(Metadata* metadata) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
3603 Constant con(metadata); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
3604 add(con); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
3605 return con; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
3606 } |
da91efe96a93
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|
3607 |
4114
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|
3608 Compile::Constant Compile::ConstantTable::add(MachConstantNode* n, MachOper* oper) { |
2008 | 3609 jvalue value; |
3610 BasicType type = oper->type()->basic_type(); | |
3611 switch (type) { | |
3612 case T_LONG: value.j = oper->constantL(); break; | |
3613 case T_FLOAT: value.f = oper->constantF(); break; | |
3614 case T_DOUBLE: value.d = oper->constantD(); break; | |
3615 case T_OBJECT: | |
3616 case T_ADDRESS: value.l = (jobject) oper->constant(); break; | |
6725
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coleenp
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|
3617 case T_METADATA: return add((Metadata*)oper->constant()); break; |
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|
3618 default: guarantee(false, err_msg_res("unhandled type: %s", type2name(type))); |
2008 | 3619 } |
4114
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|
3620 return add(n, type, value); |
2008 | 3621 } |
3622 | |
4114
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twisti
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changeset
|
3623 Compile::Constant Compile::ConstantTable::add_jump_table(MachConstantNode* n) { |
2008 | 3624 jvalue value; |
3625 // We can use the node pointer here to identify the right jump-table | |
3626 // as this method is called from Compile::Fill_buffer right before | |
3627 // the MachNodes are emitted and the jump-table is filled (means the | |
3628 // MachNode pointers do not change anymore). | |
3629 value.l = (jobject) n; | |
4114
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diff
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|
3630 Constant con(T_VOID, value, next_jump_table_freq(), false); // Labels of a jump-table cannot be reused. |
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|
3631 add(con); |
2008 | 3632 return con; |
3633 } | |
3634 | |
3635 void Compile::ConstantTable::fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray<Label*> labels) const { | |
3636 // If called from Compile::scratch_emit_size do nothing. | |
3637 if (Compile::current()->in_scratch_emit_size()) return; | |
3638 | |
3639 assert(labels.is_nonempty(), "must be"); | |
6268
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7187454: stack overflow in C2 compiler thread on Solaris x86
kvn
parents:
6179
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|
3640 assert((uint) labels.length() == n->outcnt(), err_msg_res("must be equal: %d == %d", labels.length(), n->outcnt())); |
2008 | 3641 |
3642 // Since MachConstantNode::constant_offset() also contains | |
3643 // table_base_offset() we need to subtract the table_base_offset() | |
3644 // to get the plain offset into the constant table. | |
3645 int offset = n->constant_offset() - table_base_offset(); | |
3646 | |
3647 MacroAssembler _masm(&cb); | |
3648 address* jump_table_base = (address*) (_masm.code()->consts()->start() + offset); | |
3649 | |
4114
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|
3650 for (uint i = 0; i < n->outcnt(); i++) { |
2008 | 3651 address* constant_addr = &jump_table_base[i]; |
6268
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7187454: stack overflow in C2 compiler thread on Solaris x86
kvn
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diff
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|
3652 assert(*constant_addr == (((address) n) + i), err_msg_res("all jump-table entries must contain adjusted node pointer: " INTPTR_FORMAT " == " INTPTR_FORMAT, *constant_addr, (((address) n) + i))); |
2008 | 3653 *constant_addr = cb.consts()->target(*labels.at(i), (address) constant_addr); |
3654 cb.consts()->relocate((address) constant_addr, relocInfo::internal_word_type); | |
3655 } | |
3656 } | |
7421
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
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7199
diff
changeset
|
3657 |
ad5dd04754ee
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diff
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|
3658 void Compile::dump_inlining() { |
12295 | 3659 if (print_inlining() || print_intrinsics()) { |
7473 | 3660 // Print inlining message for candidates that we couldn't inline |
3661 // for lack of space or non constant receiver | |
3662 for (int i = 0; i < _late_inlines.length(); i++) { | |
3663 CallGenerator* cg = _late_inlines.at(i); | |
3664 cg->print_inlining_late("live nodes > LiveNodeCountInliningCutoff"); | |
3665 } | |
3666 Unique_Node_List useful; | |
3667 useful.push(root()); | |
3668 for (uint next = 0; next < useful.size(); ++next) { | |
3669 Node* n = useful.at(next); | |
3670 if (n->is_Call() && n->as_Call()->generator() != NULL && n->as_Call()->generator()->call_node() == n) { | |
3671 CallNode* call = n->as_Call(); | |
3672 CallGenerator* cg = call->generator(); | |
3673 cg->print_inlining_late("receiver not constant"); | |
3674 } | |
3675 uint max = n->len(); | |
3676 for ( uint i = 0; i < max; ++i ) { | |
3677 Node *m = n->in(i); | |
3678 if ( m == NULL ) continue; | |
3679 useful.push(m); | |
3680 } | |
3681 } | |
7421
ad5dd04754ee
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roland
parents:
7199
diff
changeset
|
3682 for (int i = 0; i < _print_inlining_list->length(); i++) { |
12295 | 3683 tty->print(_print_inlining_list->adr_at(i)->ss()->as_string()); |
7421
ad5dd04754ee
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7199
diff
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|
3684 } |
ad5dd04754ee
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7199
diff
changeset
|
3685 } |
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7199
diff
changeset
|
3686 } |
8048
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
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|
3687 |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3688 int Compile::cmp_expensive_nodes(Node* n1, Node* n2) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
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|
3689 if (n1->Opcode() < n2->Opcode()) return -1; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3690 else if (n1->Opcode() > n2->Opcode()) return 1; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3691 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3692 assert(n1->req() == n2->req(), err_msg_res("can't compare %s nodes: n1->req() = %d, n2->req() = %d", NodeClassNames[n1->Opcode()], n1->req(), n2->req())); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3693 for (uint i = 1; i < n1->req(); i++) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3694 if (n1->in(i) < n2->in(i)) return -1; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3695 else if (n1->in(i) > n2->in(i)) return 1; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3696 } |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3697 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3698 return 0; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3699 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3700 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3701 int Compile::cmp_expensive_nodes(Node** n1p, Node** n2p) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3702 Node* n1 = *n1p; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
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|
3703 Node* n2 = *n2p; |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3704 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3705 return cmp_expensive_nodes(n1, n2); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3706 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3707 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3708 void Compile::sort_expensive_nodes() { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3709 if (!expensive_nodes_sorted()) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3710 _expensive_nodes->sort(cmp_expensive_nodes); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3711 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3712 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3713 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3714 bool Compile::expensive_nodes_sorted() const { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3715 for (int i = 1; i < _expensive_nodes->length(); i++) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3716 if (cmp_expensive_nodes(_expensive_nodes->adr_at(i), _expensive_nodes->adr_at(i-1)) < 0) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3717 return false; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3718 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3719 } |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3720 return true; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3721 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3722 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3723 bool Compile::should_optimize_expensive_nodes(PhaseIterGVN &igvn) { |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
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|
3724 if (_expensive_nodes->length() == 0) { |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
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|
3725 return false; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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7605
diff
changeset
|
3726 } |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3727 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3728 assert(OptimizeExpensiveOps, "optimization off?"); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3729 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3730 // Take this opportunity to remove dead nodes from the list |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3731 int j = 0; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3732 for (int i = 0; i < _expensive_nodes->length(); i++) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3733 Node* n = _expensive_nodes->at(i); |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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|
3734 if (!n->is_unreachable(igvn)) { |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3735 assert(n->is_expensive(), "should be expensive"); |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3736 _expensive_nodes->at_put(j, n); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3737 j++; |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3738 } |
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diff
changeset
|
3739 } |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3740 _expensive_nodes->trunc_to(j); |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3741 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3742 // Then sort the list so that similar nodes are next to each other |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3743 // and check for at least two nodes of identical kind with same data |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
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|
3744 // inputs. |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3745 sort_expensive_nodes(); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3746 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3747 for (int i = 0; i < _expensive_nodes->length()-1; i++) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3748 if (cmp_expensive_nodes(_expensive_nodes->adr_at(i), _expensive_nodes->adr_at(i+1)) == 0) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3749 return true; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3750 } |
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3751 } |
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3752 |
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3753 return false; |
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3754 } |
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3755 |
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3756 void Compile::cleanup_expensive_nodes(PhaseIterGVN &igvn) { |
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3757 if (_expensive_nodes->length() == 0) { |
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3758 return; |
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3759 } |
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3760 |
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3761 assert(OptimizeExpensiveOps, "optimization off?"); |
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3762 |
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3763 // Sort to bring similar nodes next to each other and clear the |
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3764 // control input of nodes for which there's only a single copy. |
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3765 sort_expensive_nodes(); |
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3766 |
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3767 int j = 0; |
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3768 int identical = 0; |
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3769 int i = 0; |
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3770 for (; i < _expensive_nodes->length()-1; i++) { |
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3771 assert(j <= i, "can't write beyond current index"); |
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3772 if (_expensive_nodes->at(i)->Opcode() == _expensive_nodes->at(i+1)->Opcode()) { |
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3773 identical++; |
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3774 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
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|
3775 continue; |
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3776 } |
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|
3777 if (identical > 0) { |
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3778 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
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3779 identical = 0; |
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3780 } else { |
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3781 Node* n = _expensive_nodes->at(i); |
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|
3782 igvn.hash_delete(n); |
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3783 n->set_req(0, NULL); |
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3784 igvn.hash_insert(n); |
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3785 } |
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3786 } |
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|
3787 if (identical > 0) { |
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3788 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
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|
3789 } else if (_expensive_nodes->length() >= 1) { |
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|
3790 Node* n = _expensive_nodes->at(i); |
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|
3791 igvn.hash_delete(n); |
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3792 n->set_req(0, NULL); |
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|
3793 igvn.hash_insert(n); |
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3794 } |
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|
3795 _expensive_nodes->trunc_to(j); |
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|
3796 } |
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|
3797 |
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|
3798 void Compile::add_expensive_node(Node * n) { |
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|
3799 assert(!_expensive_nodes->contains(n), "duplicate entry in expensive list"); |
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|
3800 assert(n->is_expensive(), "expensive nodes with non-null control here only"); |
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|
3801 assert(!n->is_CFG() && !n->is_Mem(), "no cfg or memory nodes here"); |
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|
3802 if (OptimizeExpensiveOps) { |
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|
3803 _expensive_nodes->append(n); |
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|
3804 } else { |
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|
3805 // Clear control input and let IGVN optimize expensive nodes if |
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|
3806 // OptimizeExpensiveOps is off. |
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|
3807 n->set_req(0, NULL); |
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|
3808 } |
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|
3809 } |
8691
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|
3810 |
12966 | 3811 /** |
3812 * Remove the speculative part of types and clean up the graph | |
3813 */ | |
3814 void Compile::remove_speculative_types(PhaseIterGVN &igvn) { | |
3815 if (UseTypeSpeculation) { | |
3816 Unique_Node_List worklist; | |
3817 worklist.push(root()); | |
3818 int modified = 0; | |
3819 // Go over all type nodes that carry a speculative type, drop the | |
3820 // speculative part of the type and enqueue the node for an igvn | |
3821 // which may optimize it out. | |
3822 for (uint next = 0; next < worklist.size(); ++next) { | |
3823 Node *n = worklist.at(next); | |
3824 if (n->is_Type() && n->as_Type()->type()->isa_oopptr() != NULL && | |
3825 n->as_Type()->type()->is_oopptr()->speculative() != NULL) { | |
3826 TypeNode* tn = n->as_Type(); | |
3827 const TypeOopPtr* t = tn->type()->is_oopptr(); | |
3828 bool in_hash = igvn.hash_delete(n); | |
3829 assert(in_hash, "node should be in igvn hash table"); | |
3830 tn->set_type(t->remove_speculative()); | |
3831 igvn.hash_insert(n); | |
3832 igvn._worklist.push(n); // give it a chance to go away | |
3833 modified++; | |
3834 } | |
3835 uint max = n->len(); | |
3836 for( uint i = 0; i < max; ++i ) { | |
3837 Node *m = n->in(i); | |
3838 if (not_a_node(m)) continue; | |
3839 worklist.push(m); | |
3840 } | |
3841 } | |
3842 // Drop the speculative part of all types in the igvn's type table | |
3843 igvn.remove_speculative_types(); | |
3844 if (modified > 0) { | |
3845 igvn.optimize(); | |
3846 } | |
3847 } | |
3848 } | |
3849 | |
8691
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|
3850 // Auxiliary method to support randomized stressing/fuzzing. |
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|
3851 // |
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|
3852 // This method can be called the arbitrary number of times, with current count |
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|
3853 // as the argument. The logic allows selecting a single candidate from the |
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|
3854 // running list of candidates as follows: |
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|
3855 // int count = 0; |
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|
3856 // Cand* selected = null; |
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|
3857 // while(cand = cand->next()) { |
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|
3858 // if (randomized_select(++count)) { |
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|
3859 // selected = cand; |
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|
3860 // } |
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|
3861 // } |
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|
3862 // |
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|
3863 // Including count equalizes the chances any candidate is "selected". |
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3864 // This is useful when we don't have the complete list of candidates to choose |
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3865 // from uniformly. In this case, we need to adjust the randomicity of the |
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|
3866 // selection, or else we will end up biasing the selection towards the latter |
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|
3867 // candidates. |
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|
3868 // |
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|
3869 // Quick back-envelope calculation shows that for the list of n candidates |
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|
3870 // the equal probability for the candidate to persist as "best" can be |
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|
3871 // achieved by replacing it with "next" k-th candidate with the probability |
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|
3872 // of 1/k. It can be easily shown that by the end of the run, the |
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|
3873 // probability for any candidate is converged to 1/n, thus giving the |
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|
3874 // uniform distribution among all the candidates. |
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|
3875 // |
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|
3876 // We don't care about the domain size as long as (RANDOMIZED_DOMAIN / count) is large. |
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|
3877 #define RANDOMIZED_DOMAIN_POW 29 |
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|
3878 #define RANDOMIZED_DOMAIN (1 << RANDOMIZED_DOMAIN_POW) |
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3879 #define RANDOMIZED_DOMAIN_MASK ((1 << (RANDOMIZED_DOMAIN_POW + 1)) - 1) |
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|
3880 bool Compile::randomized_select(int count) { |
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|
3881 assert(count > 0, "only positive"); |
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|
3882 return (os::random() & RANDOMIZED_DOMAIN_MASK) < (RANDOMIZED_DOMAIN / count); |
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3883 } |