Mercurial > hg > graal-compiler
annotate src/share/vm/opto/compile.cpp @ 17887:cd3c534f8f4a
8039050: Crash in C2 compiler at Node::rematerialize
Summary: Added missing calls to record_for_igvn() in loop opts. Added verification of def-use domination.
Reviewed-by: iveresov
author | kvn |
---|---|
date | Tue, 15 Apr 2014 14:34:48 -0700 |
parents | 62c54fcc0a35 |
children | 31e28ee4c9b4 |
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" |
17622 | 28 #include "ci/ciReplay.hpp" |
1972 | 29 #include "classfile/systemDictionary.hpp" |
30 #include "code/exceptionHandlerTable.hpp" | |
31 #include "code/nmethod.hpp" | |
32 #include "compiler/compileLog.hpp" | |
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33 #include "compiler/disassembler.hpp" |
1972 | 34 #include "compiler/oopMap.hpp" |
35 #include "opto/addnode.hpp" | |
36 #include "opto/block.hpp" | |
37 #include "opto/c2compiler.hpp" | |
38 #include "opto/callGenerator.hpp" | |
39 #include "opto/callnode.hpp" | |
40 #include "opto/cfgnode.hpp" | |
41 #include "opto/chaitin.hpp" | |
42 #include "opto/compile.hpp" | |
43 #include "opto/connode.hpp" | |
44 #include "opto/divnode.hpp" | |
45 #include "opto/escape.hpp" | |
46 #include "opto/idealGraphPrinter.hpp" | |
47 #include "opto/loopnode.hpp" | |
48 #include "opto/machnode.hpp" | |
49 #include "opto/macro.hpp" | |
50 #include "opto/matcher.hpp" | |
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51 #include "opto/mathexactnode.hpp" |
1972 | 52 #include "opto/memnode.hpp" |
53 #include "opto/mulnode.hpp" | |
54 #include "opto/node.hpp" | |
55 #include "opto/opcodes.hpp" | |
56 #include "opto/output.hpp" | |
57 #include "opto/parse.hpp" | |
58 #include "opto/phaseX.hpp" | |
59 #include "opto/rootnode.hpp" | |
60 #include "opto/runtime.hpp" | |
61 #include "opto/stringopts.hpp" | |
62 #include "opto/type.hpp" | |
63 #include "opto/vectornode.hpp" | |
64 #include "runtime/arguments.hpp" | |
65 #include "runtime/signature.hpp" | |
66 #include "runtime/stubRoutines.hpp" | |
67 #include "runtime/timer.hpp" | |
10405 | 68 #include "trace/tracing.hpp" |
1972 | 69 #include "utilities/copy.hpp" |
70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
71 # include "adfiles/ad_x86_32.hpp" | |
72 #endif | |
73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
74 # include "adfiles/ad_x86_64.hpp" | |
75 #endif | |
76 #ifdef TARGET_ARCH_MODEL_sparc | |
77 # include "adfiles/ad_sparc.hpp" | |
78 #endif | |
79 #ifdef TARGET_ARCH_MODEL_zero | |
80 # include "adfiles/ad_zero.hpp" | |
81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
14391 | 85 #ifdef TARGET_ARCH_MODEL_ppc_32 |
86 # include "adfiles/ad_ppc_32.hpp" | |
87 #endif | |
88 #ifdef TARGET_ARCH_MODEL_ppc_64 | |
89 # include "adfiles/ad_ppc_64.hpp" | |
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90 #endif |
0 | 91 |
2008 | 92 |
93 // -------------------- Compile::mach_constant_base_node ----------------------- | |
94 // Constant table base node singleton. | |
95 MachConstantBaseNode* Compile::mach_constant_base_node() { | |
96 if (_mach_constant_base_node == NULL) { | |
97 _mach_constant_base_node = new (C) MachConstantBaseNode(); | |
98 _mach_constant_base_node->add_req(C->root()); | |
99 } | |
100 return _mach_constant_base_node; | |
101 } | |
102 | |
103 | |
0 | 104 /// Support for intrinsics. |
105 | |
106 // Return the index at which m must be inserted (or already exists). | |
107 // The sort order is by the address of the ciMethod, with is_virtual as minor key. | |
108 int Compile::intrinsic_insertion_index(ciMethod* m, bool is_virtual) { | |
109 #ifdef ASSERT | |
110 for (int i = 1; i < _intrinsics->length(); i++) { | |
111 CallGenerator* cg1 = _intrinsics->at(i-1); | |
112 CallGenerator* cg2 = _intrinsics->at(i); | |
113 assert(cg1->method() != cg2->method() | |
114 ? cg1->method() < cg2->method() | |
115 : cg1->is_virtual() < cg2->is_virtual(), | |
116 "compiler intrinsics list must stay sorted"); | |
117 } | |
118 #endif | |
119 // Binary search sorted list, in decreasing intervals [lo, hi]. | |
120 int lo = 0, hi = _intrinsics->length()-1; | |
121 while (lo <= hi) { | |
122 int mid = (uint)(hi + lo) / 2; | |
123 ciMethod* mid_m = _intrinsics->at(mid)->method(); | |
124 if (m < mid_m) { | |
125 hi = mid-1; | |
126 } else if (m > mid_m) { | |
127 lo = mid+1; | |
128 } else { | |
129 // look at minor sort key | |
130 bool mid_virt = _intrinsics->at(mid)->is_virtual(); | |
131 if (is_virtual < mid_virt) { | |
132 hi = mid-1; | |
133 } else if (is_virtual > mid_virt) { | |
134 lo = mid+1; | |
135 } else { | |
136 return mid; // exact match | |
137 } | |
138 } | |
139 } | |
140 return lo; // inexact match | |
141 } | |
142 | |
143 void Compile::register_intrinsic(CallGenerator* cg) { | |
144 if (_intrinsics == NULL) { | |
7473 | 145 _intrinsics = new (comp_arena())GrowableArray<CallGenerator*>(comp_arena(), 60, 0, NULL); |
0 | 146 } |
147 // This code is stolen from ciObjectFactory::insert. | |
148 // Really, GrowableArray should have methods for | |
149 // insert_at, remove_at, and binary_search. | |
150 int len = _intrinsics->length(); | |
151 int index = intrinsic_insertion_index(cg->method(), cg->is_virtual()); | |
152 if (index == len) { | |
153 _intrinsics->append(cg); | |
154 } else { | |
155 #ifdef ASSERT | |
156 CallGenerator* oldcg = _intrinsics->at(index); | |
157 assert(oldcg->method() != cg->method() || oldcg->is_virtual() != cg->is_virtual(), "don't register twice"); | |
158 #endif | |
159 _intrinsics->append(_intrinsics->at(len-1)); | |
160 int pos; | |
161 for (pos = len-2; pos >= index; pos--) { | |
162 _intrinsics->at_put(pos+1,_intrinsics->at(pos)); | |
163 } | |
164 _intrinsics->at_put(index, cg); | |
165 } | |
166 assert(find_intrinsic(cg->method(), cg->is_virtual()) == cg, "registration worked"); | |
167 } | |
168 | |
169 CallGenerator* Compile::find_intrinsic(ciMethod* m, bool is_virtual) { | |
170 assert(m->is_loaded(), "don't try this on unloaded methods"); | |
171 if (_intrinsics != NULL) { | |
172 int index = intrinsic_insertion_index(m, is_virtual); | |
173 if (index < _intrinsics->length() | |
174 && _intrinsics->at(index)->method() == m | |
175 && _intrinsics->at(index)->is_virtual() == is_virtual) { | |
176 return _intrinsics->at(index); | |
177 } | |
178 } | |
179 // Lazily create intrinsics for intrinsic IDs well-known in the runtime. | |
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180 if (m->intrinsic_id() != vmIntrinsics::_none && |
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181 m->intrinsic_id() <= vmIntrinsics::LAST_COMPILER_INLINE) { |
0 | 182 CallGenerator* cg = make_vm_intrinsic(m, is_virtual); |
183 if (cg != NULL) { | |
184 // Save it for next time: | |
185 register_intrinsic(cg); | |
186 return cg; | |
187 } else { | |
188 gather_intrinsic_statistics(m->intrinsic_id(), is_virtual, _intrinsic_disabled); | |
189 } | |
190 } | |
191 return NULL; | |
192 } | |
193 | |
194 // Compile:: register_library_intrinsics and make_vm_intrinsic are defined | |
195 // in library_call.cpp. | |
196 | |
197 | |
198 #ifndef PRODUCT | |
199 // statistics gathering... | |
200 | |
201 juint Compile::_intrinsic_hist_count[vmIntrinsics::ID_LIMIT] = {0}; | |
202 jubyte Compile::_intrinsic_hist_flags[vmIntrinsics::ID_LIMIT] = {0}; | |
203 | |
204 bool Compile::gather_intrinsic_statistics(vmIntrinsics::ID id, bool is_virtual, int flags) { | |
205 assert(id > vmIntrinsics::_none && id < vmIntrinsics::ID_LIMIT, "oob"); | |
206 int oflags = _intrinsic_hist_flags[id]; | |
207 assert(flags != 0, "what happened?"); | |
208 if (is_virtual) { | |
209 flags |= _intrinsic_virtual; | |
210 } | |
211 bool changed = (flags != oflags); | |
212 if ((flags & _intrinsic_worked) != 0) { | |
213 juint count = (_intrinsic_hist_count[id] += 1); | |
214 if (count == 1) { | |
215 changed = true; // first time | |
216 } | |
217 // increment the overall count also: | |
218 _intrinsic_hist_count[vmIntrinsics::_none] += 1; | |
219 } | |
220 if (changed) { | |
221 if (((oflags ^ flags) & _intrinsic_virtual) != 0) { | |
222 // Something changed about the intrinsic's virtuality. | |
223 if ((flags & _intrinsic_virtual) != 0) { | |
224 // This is the first use of this intrinsic as a virtual call. | |
225 if (oflags != 0) { | |
226 // We already saw it as a non-virtual, so note both cases. | |
227 flags |= _intrinsic_both; | |
228 } | |
229 } else if ((oflags & _intrinsic_both) == 0) { | |
230 // This is the first use of this intrinsic as a non-virtual | |
231 flags |= _intrinsic_both; | |
232 } | |
233 } | |
234 _intrinsic_hist_flags[id] = (jubyte) (oflags | flags); | |
235 } | |
236 // update the overall flags also: | |
237 _intrinsic_hist_flags[vmIntrinsics::_none] |= (jubyte) flags; | |
238 return changed; | |
239 } | |
240 | |
241 static char* format_flags(int flags, char* buf) { | |
242 buf[0] = 0; | |
243 if ((flags & Compile::_intrinsic_worked) != 0) strcat(buf, ",worked"); | |
244 if ((flags & Compile::_intrinsic_failed) != 0) strcat(buf, ",failed"); | |
245 if ((flags & Compile::_intrinsic_disabled) != 0) strcat(buf, ",disabled"); | |
246 if ((flags & Compile::_intrinsic_virtual) != 0) strcat(buf, ",virtual"); | |
247 if ((flags & Compile::_intrinsic_both) != 0) strcat(buf, ",nonvirtual"); | |
248 if (buf[0] == 0) strcat(buf, ","); | |
249 assert(buf[0] == ',', "must be"); | |
250 return &buf[1]; | |
251 } | |
252 | |
253 void Compile::print_intrinsic_statistics() { | |
254 char flagsbuf[100]; | |
255 ttyLocker ttyl; | |
256 if (xtty != NULL) xtty->head("statistics type='intrinsic'"); | |
257 tty->print_cr("Compiler intrinsic usage:"); | |
258 juint total = _intrinsic_hist_count[vmIntrinsics::_none]; | |
259 if (total == 0) total = 1; // avoid div0 in case of no successes | |
260 #define PRINT_STAT_LINE(name, c, f) \ | |
261 tty->print_cr(" %4d (%4.1f%%) %s (%s)", (int)(c), ((c) * 100.0) / total, name, f); | |
262 for (int index = 1 + (int)vmIntrinsics::_none; index < (int)vmIntrinsics::ID_LIMIT; index++) { | |
263 vmIntrinsics::ID id = (vmIntrinsics::ID) index; | |
264 int flags = _intrinsic_hist_flags[id]; | |
265 juint count = _intrinsic_hist_count[id]; | |
266 if ((flags | count) != 0) { | |
267 PRINT_STAT_LINE(vmIntrinsics::name_at(id), count, format_flags(flags, flagsbuf)); | |
268 } | |
269 } | |
270 PRINT_STAT_LINE("total", total, format_flags(_intrinsic_hist_flags[vmIntrinsics::_none], flagsbuf)); | |
271 if (xtty != NULL) xtty->tail("statistics"); | |
272 } | |
273 | |
274 void Compile::print_statistics() { | |
275 { ttyLocker ttyl; | |
276 if (xtty != NULL) xtty->head("statistics type='opto'"); | |
277 Parse::print_statistics(); | |
278 PhaseCCP::print_statistics(); | |
279 PhaseRegAlloc::print_statistics(); | |
280 Scheduling::print_statistics(); | |
281 PhasePeephole::print_statistics(); | |
282 PhaseIdealLoop::print_statistics(); | |
283 if (xtty != NULL) xtty->tail("statistics"); | |
284 } | |
285 if (_intrinsic_hist_flags[vmIntrinsics::_none] != 0) { | |
286 // put this under its own <statistics> element. | |
287 print_intrinsic_statistics(); | |
288 } | |
289 } | |
290 #endif //PRODUCT | |
291 | |
292 // Support for bundling info | |
293 Bundle* Compile::node_bundling(const Node *n) { | |
294 assert(valid_bundle_info(n), "oob"); | |
295 return &_node_bundling_base[n->_idx]; | |
296 } | |
297 | |
298 bool Compile::valid_bundle_info(const Node *n) { | |
299 return (_node_bundling_limit > n->_idx); | |
300 } | |
301 | |
302 | |
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303 void Compile::gvn_replace_by(Node* n, Node* nn) { |
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304 for (DUIterator_Last imin, i = n->last_outs(imin); i >= imin; ) { |
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305 Node* use = n->last_out(i); |
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306 bool is_in_table = initial_gvn()->hash_delete(use); |
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307 uint uses_found = 0; |
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308 for (uint j = 0; j < use->len(); j++) { |
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309 if (use->in(j) == n) { |
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310 if (j < use->req()) |
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311 use->set_req(j, nn); |
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312 else |
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313 use->set_prec(j, nn); |
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314 uses_found++; |
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315 } |
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316 } |
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317 if (is_in_table) { |
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318 // reinsert into table |
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319 initial_gvn()->hash_find_insert(use); |
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320 } |
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321 record_for_igvn(use); |
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322 i -= uses_found; // we deleted 1 or more copies of this edge |
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323 } |
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324 } |
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325 |
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326 |
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327 static inline bool not_a_node(const Node* n) { |
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328 if (n == NULL) return true; |
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329 if (((intptr_t)n & 1) != 0) return true; // uninitialized, etc. |
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330 if (*(address*)n == badAddress) return true; // kill by Node::destruct |
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331 return false; |
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332 } |
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333 |
0 | 334 // Identify all nodes that are reachable from below, useful. |
335 // Use breadth-first pass that records state in a Unique_Node_List, | |
336 // recursive traversal is slower. | |
337 void Compile::identify_useful_nodes(Unique_Node_List &useful) { | |
338 int estimated_worklist_size = unique(); | |
339 useful.map( estimated_worklist_size, NULL ); // preallocate space | |
340 | |
341 // Initialize worklist | |
342 if (root() != NULL) { useful.push(root()); } | |
343 // If 'top' is cached, declare it useful to preserve cached node | |
344 if( cached_top_node() ) { useful.push(cached_top_node()); } | |
345 | |
346 // Push all useful nodes onto the list, breadthfirst | |
347 for( uint next = 0; next < useful.size(); ++next ) { | |
348 assert( next < unique(), "Unique useful nodes < total nodes"); | |
349 Node *n = useful.at(next); | |
350 uint max = n->len(); | |
351 for( uint i = 0; i < max; ++i ) { | |
352 Node *m = n->in(i); | |
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353 if (not_a_node(m)) continue; |
0 | 354 useful.push(m); |
355 } | |
356 } | |
357 } | |
358 | |
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359 // Update dead_node_list with any missing dead nodes using useful |
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360 // list. Consider all non-useful nodes to be useless i.e., dead nodes. |
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361 void Compile::update_dead_node_list(Unique_Node_List &useful) { |
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362 uint max_idx = unique(); |
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363 VectorSet& useful_node_set = useful.member_set(); |
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364 |
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365 for (uint node_idx = 0; node_idx < max_idx; node_idx++) { |
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366 // If node with index node_idx is not in useful set, |
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367 // mark it as dead in dead node list. |
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368 if (! useful_node_set.test(node_idx) ) { |
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369 record_dead_node(node_idx); |
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370 } |
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371 } |
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372 } |
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373 |
7473 | 374 void Compile::remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful) { |
375 int shift = 0; | |
376 for (int i = 0; i < inlines->length(); i++) { | |
377 CallGenerator* cg = inlines->at(i); | |
378 CallNode* call = cg->call_node(); | |
379 if (shift > 0) { | |
380 inlines->at_put(i-shift, cg); | |
381 } | |
382 if (!useful.member(call)) { | |
383 shift++; | |
384 } | |
385 } | |
386 inlines->trunc_to(inlines->length()-shift); | |
387 } | |
388 | |
0 | 389 // Disconnect all useless nodes by disconnecting those at the boundary. |
390 void Compile::remove_useless_nodes(Unique_Node_List &useful) { | |
391 uint next = 0; | |
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392 while (next < useful.size()) { |
0 | 393 Node *n = useful.at(next++); |
394 // Use raw traversal of out edges since this code removes out edges | |
395 int max = n->outcnt(); | |
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396 for (int j = 0; j < max; ++j) { |
0 | 397 Node* child = n->raw_out(j); |
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398 if (! useful.member(child)) { |
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399 assert(!child->is_top() || child != top(), |
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400 "If top is cached in Compile object it is in useful list"); |
0 | 401 // Only need to remove this out-edge to the useless node |
402 n->raw_del_out(j); | |
403 --j; | |
404 --max; | |
405 } | |
406 } | |
407 if (n->outcnt() == 1 && n->has_special_unique_user()) { | |
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408 record_for_igvn(n->unique_out()); |
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409 } |
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410 } |
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411 // Remove useless macro and predicate opaq nodes |
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412 for (int i = C->macro_count()-1; i >= 0; i--) { |
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413 Node* n = C->macro_node(i); |
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414 if (!useful.member(n)) { |
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415 remove_macro_node(n); |
0 | 416 } |
417 } | |
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418 // Remove useless expensive node |
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419 for (int i = C->expensive_count()-1; i >= 0; i--) { |
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420 Node* n = C->expensive_node(i); |
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421 if (!useful.member(n)) { |
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422 remove_expensive_node(n); |
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423 } |
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424 } |
7473 | 425 // clean up the late inline lists |
426 remove_useless_late_inlines(&_string_late_inlines, useful); | |
10278 | 427 remove_useless_late_inlines(&_boxing_late_inlines, useful); |
7473 | 428 remove_useless_late_inlines(&_late_inlines, useful); |
0 | 429 debug_only(verify_graph_edges(true/*check for no_dead_code*/);) |
430 } | |
431 | |
432 //------------------------------frame_size_in_words----------------------------- | |
433 // frame_slots in units of words | |
434 int Compile::frame_size_in_words() const { | |
435 // shift is 0 in LP32 and 1 in LP64 | |
436 const int shift = (LogBytesPerWord - LogBytesPerInt); | |
437 int words = _frame_slots >> shift; | |
438 assert( words << shift == _frame_slots, "frame size must be properly aligned in LP64" ); | |
439 return words; | |
440 } | |
441 | |
442 // ============================================================================ | |
443 //------------------------------CompileWrapper--------------------------------- | |
444 class CompileWrapper : public StackObj { | |
445 Compile *const _compile; | |
446 public: | |
447 CompileWrapper(Compile* compile); | |
448 | |
449 ~CompileWrapper(); | |
450 }; | |
451 | |
452 CompileWrapper::CompileWrapper(Compile* compile) : _compile(compile) { | |
453 // the Compile* pointer is stored in the current ciEnv: | |
454 ciEnv* env = compile->env(); | |
455 assert(env == ciEnv::current(), "must already be a ciEnv active"); | |
456 assert(env->compiler_data() == NULL, "compile already active?"); | |
457 env->set_compiler_data(compile); | |
458 assert(compile == Compile::current(), "sanity"); | |
459 | |
460 compile->set_type_dict(NULL); | |
461 compile->set_type_hwm(NULL); | |
462 compile->set_type_last_size(0); | |
463 compile->set_last_tf(NULL, NULL); | |
464 compile->set_indexSet_arena(NULL); | |
465 compile->set_indexSet_free_block_list(NULL); | |
466 compile->init_type_arena(); | |
467 Type::Initialize(compile); | |
468 _compile->set_scratch_buffer_blob(NULL); | |
469 _compile->begin_method(); | |
470 } | |
471 CompileWrapper::~CompileWrapper() { | |
472 _compile->end_method(); | |
473 if (_compile->scratch_buffer_blob() != NULL) | |
474 BufferBlob::free(_compile->scratch_buffer_blob()); | |
475 _compile->env()->set_compiler_data(NULL); | |
476 } | |
477 | |
478 | |
479 //----------------------------print_compile_messages--------------------------- | |
480 void Compile::print_compile_messages() { | |
481 #ifndef PRODUCT | |
482 // Check if recompiling | |
483 if (_subsume_loads == false && PrintOpto) { | |
484 // Recompiling without allowing machine instructions to subsume loads | |
485 tty->print_cr("*********************************************************"); | |
486 tty->print_cr("** Bailout: Recompile without subsuming loads **"); | |
487 tty->print_cr("*********************************************************"); | |
488 } | |
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489 if (_do_escape_analysis != DoEscapeAnalysis && PrintOpto) { |
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490 // Recompiling without escape analysis |
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491 tty->print_cr("*********************************************************"); |
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492 tty->print_cr("** Bailout: Recompile without escape analysis **"); |
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493 tty->print_cr("*********************************************************"); |
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494 } |
10278 | 495 if (_eliminate_boxing != EliminateAutoBox && PrintOpto) { |
496 // Recompiling without boxing elimination | |
497 tty->print_cr("*********************************************************"); | |
498 tty->print_cr("** Bailout: Recompile without boxing elimination **"); | |
499 tty->print_cr("*********************************************************"); | |
500 } | |
0 | 501 if (env()->break_at_compile()) { |
605 | 502 // Open the debugger when compiling this method. |
0 | 503 tty->print("### Breaking when compiling: "); |
504 method()->print_short_name(); | |
505 tty->cr(); | |
506 BREAKPOINT; | |
507 } | |
508 | |
509 if( PrintOpto ) { | |
510 if (is_osr_compilation()) { | |
511 tty->print("[OSR]%3d", _compile_id); | |
512 } else { | |
513 tty->print("%3d", _compile_id); | |
514 } | |
515 } | |
516 #endif | |
517 } | |
518 | |
519 | |
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520 //-----------------------init_scratch_buffer_blob------------------------------ |
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521 // Construct a temporary BufferBlob and cache it for this compile. |
2008 | 522 void Compile::init_scratch_buffer_blob(int const_size) { |
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523 // If there is already a scratch buffer blob allocated and the |
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524 // constant section is big enough, use it. Otherwise free the |
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525 // current and allocate a new one. |
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526 BufferBlob* blob = scratch_buffer_blob(); |
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527 if ((blob != NULL) && (const_size <= _scratch_const_size)) { |
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528 // Use the current blob. |
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529 } else { |
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530 if (blob != NULL) { |
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531 BufferBlob::free(blob); |
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532 } |
0 | 533 |
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534 ResourceMark rm; |
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535 _scratch_const_size = const_size; |
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536 int size = (MAX_inst_size + MAX_stubs_size + _scratch_const_size); |
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537 blob = BufferBlob::create("Compile::scratch_buffer", size); |
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538 // Record the buffer blob for next time. |
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539 set_scratch_buffer_blob(blob); |
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540 // Have we run out of code space? |
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541 if (scratch_buffer_blob() == NULL) { |
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542 // Let CompilerBroker disable further compilations. |
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543 record_failure("Not enough space for scratch buffer in CodeCache"); |
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544 return; |
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545 } |
163 | 546 } |
0 | 547 |
548 // Initialize the relocation buffers | |
1748 | 549 relocInfo* locs_buf = (relocInfo*) blob->content_end() - MAX_locs_size; |
0 | 550 set_scratch_locs_memory(locs_buf); |
551 } | |
552 | |
553 | |
554 //-----------------------scratch_emit_size------------------------------------- | |
555 // Helper function that computes size by emitting code | |
556 uint Compile::scratch_emit_size(const Node* n) { | |
2008 | 557 // Start scratch_emit_size section. |
558 set_in_scratch_emit_size(true); | |
559 | |
0 | 560 // Emit into a trash buffer and count bytes emitted. |
561 // This is a pretty expensive way to compute a size, | |
562 // but it works well enough if seldom used. | |
563 // All common fixed-size instructions are given a size | |
564 // method by the AD file. | |
565 // Note that the scratch buffer blob and locs memory are | |
566 // allocated at the beginning of the compile task, and | |
567 // may be shared by several calls to scratch_emit_size. | |
568 // The allocation of the scratch buffer blob is particularly | |
569 // expensive, since it has to grab the code cache lock. | |
570 BufferBlob* blob = this->scratch_buffer_blob(); | |
571 assert(blob != NULL, "Initialize BufferBlob at start"); | |
572 assert(blob->size() > MAX_inst_size, "sanity"); | |
573 relocInfo* locs_buf = scratch_locs_memory(); | |
1748 | 574 address blob_begin = blob->content_begin(); |
0 | 575 address blob_end = (address)locs_buf; |
1748 | 576 assert(blob->content_contains(blob_end), "sanity"); |
0 | 577 CodeBuffer buf(blob_begin, blob_end - blob_begin); |
2008 | 578 buf.initialize_consts_size(_scratch_const_size); |
0 | 579 buf.initialize_stubs_size(MAX_stubs_size); |
580 assert(locs_buf != NULL, "sanity"); | |
2008 | 581 int lsize = MAX_locs_size / 3; |
582 buf.consts()->initialize_shared_locs(&locs_buf[lsize * 0], lsize); | |
583 buf.insts()->initialize_shared_locs( &locs_buf[lsize * 1], lsize); | |
584 buf.stubs()->initialize_shared_locs( &locs_buf[lsize * 2], lsize); | |
585 | |
586 // Do the emission. | |
3839 | 587 |
588 Label fakeL; // Fake label for branch instructions. | |
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589 Label* saveL = NULL; |
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590 uint save_bnum = 0; |
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591 bool is_branch = n->is_MachBranch(); |
3839 | 592 if (is_branch) { |
593 MacroAssembler masm(&buf); | |
594 masm.bind(fakeL); | |
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595 n->as_MachBranch()->save_label(&saveL, &save_bnum); |
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596 n->as_MachBranch()->label_set(&fakeL, 0); |
3839 | 597 } |
0 | 598 n->emit(buf, this->regalloc()); |
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599 if (is_branch) // Restore label. |
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600 n->as_MachBranch()->label_set(saveL, save_bnum); |
2008 | 601 |
602 // End scratch_emit_size section. | |
603 set_in_scratch_emit_size(false); | |
604 | |
1748 | 605 return buf.insts_size(); |
0 | 606 } |
607 | |
608 | |
609 // ============================================================================ | |
610 //------------------------------Compile standard------------------------------- | |
611 debug_only( int Compile::_debug_idx = 100000; ) | |
612 | |
613 // Compile a method. entry_bci is -1 for normal compilations and indicates | |
614 // the continuation bci for on stack replacement. | |
615 | |
616 | |
10278 | 617 Compile::Compile( ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, int osr_bci, |
618 bool subsume_loads, bool do_escape_analysis, bool eliminate_boxing ) | |
0 | 619 : Phase(Compiler), |
620 _env(ci_env), | |
621 _log(ci_env->log()), | |
622 _compile_id(ci_env->compile_id()), | |
623 _save_argument_registers(false), | |
624 _stub_name(NULL), | |
625 _stub_function(NULL), | |
626 _stub_entry_point(NULL), | |
627 _method(target), | |
628 _entry_bci(osr_bci), | |
629 _initial_gvn(NULL), | |
630 _for_igvn(NULL), | |
631 _warm_calls(NULL), | |
632 _subsume_loads(subsume_loads), | |
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633 _do_escape_analysis(do_escape_analysis), |
10278 | 634 _eliminate_boxing(eliminate_boxing), |
0 | 635 _failure_reason(NULL), |
636 _code_buffer("Compile::Fill_buffer"), | |
637 _orig_pc_slot(0), | |
638 _orig_pc_slot_offset_in_bytes(0), | |
1265 | 639 _has_method_handle_invokes(false), |
2008 | 640 _mach_constant_base_node(NULL), |
0 | 641 _node_bundling_limit(0), |
642 _node_bundling_base(NULL), | |
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643 _java_calls(0), |
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644 _inner_loops(0), |
2008 | 645 _scratch_const_size(-1), |
646 _in_scratch_emit_size(false), | |
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647 _dead_node_list(comp_arena()), |
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648 _dead_node_count(0), |
0 | 649 #ifndef PRODUCT |
650 _trace_opto_output(TraceOptoOutput || method()->has_option("TraceOptoOutput")), | |
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651 _in_dump_cnt(0), |
0 | 652 _printer(IdealGraphPrinter::printer()), |
653 #endif | |
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654 _congraph(NULL), |
17622 | 655 _replay_inline_data(NULL), |
7473 | 656 _late_inlines(comp_arena(), 2, 0, NULL), |
657 _string_late_inlines(comp_arena(), 2, 0, NULL), | |
10278 | 658 _boxing_late_inlines(comp_arena(), 2, 0, NULL), |
7473 | 659 _late_inlines_pos(0), |
660 _number_of_mh_late_inlines(0), | |
661 _inlining_progress(false), | |
662 _inlining_incrementally(false), | |
7421
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663 _print_inlining_list(NULL), |
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664 _print_inlining_idx(0), |
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|
665 _preserve_jvm_state(0) { |
0 | 666 C = this; |
667 | |
668 CompileWrapper cw(this); | |
669 #ifndef PRODUCT | |
670 if (TimeCompiler2) { | |
671 tty->print(" "); | |
672 target->holder()->name()->print(); | |
673 tty->print("."); | |
674 target->print_short_name(); | |
675 tty->print(" "); | |
676 } | |
677 TraceTime t1("Total compilation time", &_t_totalCompilation, TimeCompiler, TimeCompiler2); | |
678 TraceTime t2(NULL, &_t_methodCompilation, TimeCompiler, false); | |
100
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679 bool print_opto_assembly = PrintOptoAssembly || _method->has_option("PrintOptoAssembly"); |
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680 if (!print_opto_assembly) { |
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|
681 bool print_assembly = (PrintAssembly || _method->should_print_assembly()); |
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682 if (print_assembly && !Disassembler::can_decode()) { |
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|
683 tty->print_cr("PrintAssembly request changed to PrintOptoAssembly"); |
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684 print_opto_assembly = true; |
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|
685 } |
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|
686 } |
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|
687 set_print_assembly(print_opto_assembly); |
367
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688 set_parsed_irreducible_loop(false); |
17622 | 689 |
690 if (method()->has_option("ReplayInline")) { | |
691 _replay_inline_data = ciReplay::load_inline_data(method(), entry_bci(), ci_env->comp_level()); | |
692 } | |
0 | 693 #endif |
12295 | 694 set_print_inlining(PrintInlining || method()->has_option("PrintInlining") NOT_PRODUCT( || PrintOptoInlining)); |
695 set_print_intrinsics(PrintIntrinsics || method()->has_option("PrintIntrinsics")); | |
0 | 696 |
17780 | 697 if (ProfileTraps RTM_OPT_ONLY( || UseRTMLocking )) { |
0 | 698 // Make sure the method being compiled gets its own MDO, |
699 // so we can at least track the decompile_count(). | |
17780 | 700 // Need MDO to record RTM code generation state. |
2007
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|
701 method()->ensure_method_data(); |
0 | 702 } |
703 | |
704 Init(::AliasLevel); | |
705 | |
706 | |
707 print_compile_messages(); | |
708 | |
17672 | 709 _ilt = InlineTree::build_inline_tree_root(); |
0 | 710 |
711 // Even if NO memory addresses are used, MergeMem nodes must have at least 1 slice | |
712 assert(num_alias_types() >= AliasIdxRaw, ""); | |
713 | |
714 #define MINIMUM_NODE_HASH 1023 | |
715 // Node list that Iterative GVN will start with | |
716 Unique_Node_List for_igvn(comp_arena()); | |
717 set_for_igvn(&for_igvn); | |
718 | |
719 // GVN that will be run immediately on new nodes | |
720 uint estimated_size = method()->code_size()*4+64; | |
721 estimated_size = (estimated_size < MINIMUM_NODE_HASH ? MINIMUM_NODE_HASH : estimated_size); | |
722 PhaseGVN gvn(node_arena(), estimated_size); | |
723 set_initial_gvn(&gvn); | |
724 | |
12295 | 725 if (print_inlining() || print_intrinsics()) { |
7421
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726 _print_inlining_list = new (comp_arena())GrowableArray<PrintInliningBuffer>(comp_arena(), 1, 1, PrintInliningBuffer()); |
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727 } |
0 | 728 { // Scope for timing the parser |
729 TracePhase t3("parse", &_t_parser, true); | |
730 | |
731 // Put top into the hash table ASAP. | |
732 initial_gvn()->transform_no_reclaim(top()); | |
733 | |
734 // Set up tf(), start(), and find a CallGenerator. | |
3249
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735 CallGenerator* cg = NULL; |
0 | 736 if (is_osr_compilation()) { |
737 const TypeTuple *domain = StartOSRNode::osr_domain(); | |
738 const TypeTuple *range = TypeTuple::make_range(method()->signature()); | |
739 init_tf(TypeFunc::make(domain, range)); | |
6804
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740 StartNode* s = new (this) StartOSRNode(root(), domain); |
0 | 741 initial_gvn()->set_type_bottom(s); |
742 init_start(s); | |
743 cg = CallGenerator::for_osr(method(), entry_bci()); | |
744 } else { | |
745 // Normal case. | |
746 init_tf(TypeFunc::make(method())); | |
6804
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747 StartNode* s = new (this) StartNode(root(), tf()->domain()); |
0 | 748 initial_gvn()->set_type_bottom(s); |
749 init_start(s); | |
3249
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|
750 if (method()->intrinsic_id() == vmIntrinsics::_Reference_get && UseG1GC) { |
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7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
751 // With java.lang.ref.reference.get() we must go through the |
e1162778c1c8
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|
752 // intrinsic when G1 is enabled - even when get() is the root |
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|
753 // method of the compile - so that, if necessary, the value in |
e1162778c1c8
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|
754 // the referent field of the reference object gets recorded by |
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
755 // the pre-barrier code. |
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|
756 // Specifically, if G1 is enabled, the value in the referent |
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|
757 // field is recorded by the G1 SATB pre barrier. This will |
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|
758 // result in the referent being marked live and the reference |
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|
759 // object removed from the list of discovered references during |
e1162778c1c8
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|
760 // reference processing. |
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changeset
|
761 cg = find_intrinsic(method(), false); |
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diff
changeset
|
762 } |
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|
763 if (cg == NULL) { |
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|
764 float past_uses = method()->interpreter_invocation_count(); |
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|
765 float expected_uses = past_uses; |
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|
766 cg = CallGenerator::for_inline(method(), expected_uses); |
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767 } |
0 | 768 } |
769 if (failing()) return; | |
770 if (cg == NULL) { | |
771 record_method_not_compilable_all_tiers("cannot parse method"); | |
772 return; | |
773 } | |
774 JVMState* jvms = build_start_state(start(), tf()); | |
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775 if ((jvms = cg->generate(jvms, NULL)) == NULL) { |
0 | 776 record_method_not_compilable("method parse failed"); |
777 return; | |
778 } | |
779 GraphKit kit(jvms); | |
780 | |
781 if (!kit.stopped()) { | |
782 // Accept return values, and transfer control we know not where. | |
783 // This is done by a special, unique ReturnNode bound to root. | |
784 return_values(kit.jvms()); | |
785 } | |
786 | |
787 if (kit.has_exceptions()) { | |
788 // Any exceptions that escape from this call must be rethrown | |
789 // to whatever caller is dynamically above us on the stack. | |
790 // This is done by a special, unique RethrowNode bound to root. | |
791 rethrow_exceptions(kit.transfer_exceptions_into_jvms()); | |
792 } | |
793 | |
7473 | 794 assert(IncrementalInline || (_late_inlines.length() == 0 && !has_mh_late_inlines()), "incremental inlining is off"); |
795 | |
796 if (_late_inlines.length() == 0 && !has_mh_late_inlines() && !failing() && has_stringbuilder()) { | |
797 inline_string_calls(true); | |
1080
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diff
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|
798 } |
7473 | 799 |
800 if (failing()) return; | |
1080
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6892658: C2 should optimize some stringbuilder patterns
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parents:
929
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|
801 |
10405 | 802 print_method(PHASE_BEFORE_REMOVEUSELESS, 3); |
367
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|
803 |
0 | 804 // Remove clutter produced by parsing. |
805 if (!failing()) { | |
806 ResourceMark rm; | |
807 PhaseRemoveUseless pru(initial_gvn(), &for_igvn); | |
808 } | |
809 } | |
810 | |
811 // Note: Large methods are capped off in do_one_bytecode(). | |
812 if (failing()) return; | |
813 | |
814 // After parsing, node notes are no longer automagic. | |
815 // They must be propagated by register_new_node_with_optimizer(), | |
816 // clone(), or the like. | |
817 set_default_node_notes(NULL); | |
818 | |
819 for (;;) { | |
820 int successes = Inline_Warm(); | |
821 if (failing()) return; | |
822 if (successes == 0) break; | |
823 } | |
824 | |
825 // Drain the list. | |
826 Finish_Warm(); | |
827 #ifndef PRODUCT | |
828 if (_printer) { | |
829 _printer->print_inlining(this); | |
830 } | |
831 #endif | |
832 | |
833 if (failing()) return; | |
834 NOT_PRODUCT( verify_graph_edges(); ) | |
835 | |
836 // Now optimize | |
837 Optimize(); | |
838 if (failing()) return; | |
839 NOT_PRODUCT( verify_graph_edges(); ) | |
840 | |
841 #ifndef PRODUCT | |
842 if (PrintIdeal) { | |
843 ttyLocker ttyl; // keep the following output all in one block | |
844 // This output goes directly to the tty, not the compiler log. | |
845 // To enable tools to match it up with the compilation activity, | |
846 // be sure to tag this tty output with the compile ID. | |
847 if (xtty != NULL) { | |
848 xtty->head("ideal compile_id='%d'%s", compile_id(), | |
849 is_osr_compilation() ? " compile_kind='osr'" : | |
850 ""); | |
851 } | |
852 root()->dump(9999); | |
853 if (xtty != NULL) { | |
854 xtty->tail("ideal"); | |
855 } | |
856 } | |
857 #endif | |
858 | |
13045
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8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
859 NOT_PRODUCT( verify_barriers(); ) |
17622 | 860 |
861 // Dump compilation data to replay it. | |
862 if (method()->has_option("DumpReplay")) { | |
863 env()->dump_replay_data(_compile_id); | |
864 } | |
865 if (method()->has_option("DumpInline") && (ilt() != NULL)) { | |
866 env()->dump_inline_data(_compile_id); | |
867 } | |
868 | |
0 | 869 // Now that we know the size of all the monitors we can add a fixed slot |
870 // for the original deopt pc. | |
871 | |
872 _orig_pc_slot = fixed_slots(); | |
873 int next_slot = _orig_pc_slot + (sizeof(address) / VMRegImpl::stack_slot_size); | |
874 set_fixed_slots(next_slot); | |
875 | |
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|
876 // Compute when to use implicit null checks. Used by matching trap based |
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diff
changeset
|
877 // nodes and NullCheck optimization. |
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diff
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|
878 set_allowed_deopt_reasons(); |
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|
879 |
0 | 880 // Now generate code |
881 Code_Gen(); | |
882 if (failing()) return; | |
883 | |
884 // Check if we want to skip execution of all compiled code. | |
885 { | |
886 #ifndef PRODUCT | |
887 if (OptoNoExecute) { | |
888 record_method_not_compilable("+OptoNoExecute"); // Flag as failed | |
889 return; | |
890 } | |
891 TracePhase t2("install_code", &_t_registerMethod, TimeCompiler); | |
892 #endif | |
893 | |
894 if (is_osr_compilation()) { | |
895 _code_offsets.set_value(CodeOffsets::Verified_Entry, 0); | |
896 _code_offsets.set_value(CodeOffsets::OSR_Entry, _first_block_size); | |
897 } else { | |
898 _code_offsets.set_value(CodeOffsets::Verified_Entry, _first_block_size); | |
899 _code_offsets.set_value(CodeOffsets::OSR_Entry, 0); | |
900 } | |
901 | |
902 env()->register_method(_method, _entry_bci, | |
903 &_code_offsets, | |
904 _orig_pc_slot_offset_in_bytes, | |
905 code_buffer(), | |
906 frame_size_in_words(), _oop_map_set, | |
907 &_handler_table, &_inc_table, | |
908 compiler, | |
909 env()->comp_level(), | |
6792
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changeset
|
910 has_unsafe_access(), |
17780 | 911 SharedRuntime::is_wide_vector(max_vector_size()), |
912 rtm_state() | |
0 | 913 ); |
6843 | 914 |
915 if (log() != NULL) // Print code cache state into compiler log | |
916 log()->code_cache_state(); | |
0 | 917 } |
918 } | |
919 | |
920 //------------------------------Compile---------------------------------------- | |
921 // Compile a runtime stub | |
922 Compile::Compile( ciEnv* ci_env, | |
923 TypeFunc_generator generator, | |
924 address stub_function, | |
925 const char *stub_name, | |
926 int is_fancy_jump, | |
927 bool pass_tls, | |
928 bool save_arg_registers, | |
929 bool return_pc ) | |
930 : Phase(Compiler), | |
931 _env(ci_env), | |
932 _log(ci_env->log()), | |
8730
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8005772: Stubs report compile id -1 in phase events
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diff
changeset
|
933 _compile_id(0), |
0 | 934 _save_argument_registers(save_arg_registers), |
935 _method(NULL), | |
936 _stub_name(stub_name), | |
937 _stub_function(stub_function), | |
938 _stub_entry_point(NULL), | |
939 _entry_bci(InvocationEntryBci), | |
940 _initial_gvn(NULL), | |
941 _for_igvn(NULL), | |
942 _warm_calls(NULL), | |
943 _orig_pc_slot(0), | |
944 _orig_pc_slot_offset_in_bytes(0), | |
945 _subsume_loads(true), | |
38
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6667610: (Escape Analysis) retry compilation without EA if it fails
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diff
changeset
|
946 _do_escape_analysis(false), |
10278 | 947 _eliminate_boxing(false), |
0 | 948 _failure_reason(NULL), |
949 _code_buffer("Compile::Fill_buffer"), | |
1265 | 950 _has_method_handle_invokes(false), |
2008 | 951 _mach_constant_base_node(NULL), |
0 | 952 _node_bundling_limit(0), |
953 _node_bundling_base(NULL), | |
859
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|
954 _java_calls(0), |
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|
955 _inner_loops(0), |
0 | 956 #ifndef PRODUCT |
957 _trace_opto_output(TraceOptoOutput), | |
14438
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958 _in_dump_cnt(0), |
0 | 959 _printer(NULL), |
960 #endif | |
7196
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diff
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|
961 _dead_node_list(comp_arena()), |
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|
962 _dead_node_count(0), |
7421
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963 _congraph(NULL), |
17622 | 964 _replay_inline_data(NULL), |
7473 | 965 _number_of_mh_late_inlines(0), |
966 _inlining_progress(false), | |
967 _inlining_incrementally(false), | |
7421
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968 _print_inlining_list(NULL), |
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969 _print_inlining_idx(0), |
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970 _preserve_jvm_state(0), |
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|
971 _allowed_reasons(0) { |
0 | 972 C = this; |
973 | |
974 #ifndef PRODUCT | |
975 TraceTime t1(NULL, &_t_totalCompilation, TimeCompiler, false); | |
976 TraceTime t2(NULL, &_t_stubCompilation, TimeCompiler, false); | |
977 set_print_assembly(PrintFrameConverterAssembly); | |
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978 set_parsed_irreducible_loop(false); |
0 | 979 #endif |
980 CompileWrapper cw(this); | |
981 Init(/*AliasLevel=*/ 0); | |
982 init_tf((*generator)()); | |
983 | |
984 { | |
985 // The following is a dummy for the sake of GraphKit::gen_stub | |
986 Unique_Node_List for_igvn(comp_arena()); | |
987 set_for_igvn(&for_igvn); // not used, but some GraphKit guys push on this | |
988 PhaseGVN gvn(Thread::current()->resource_area(),255); | |
989 set_initial_gvn(&gvn); // not significant, but GraphKit guys use it pervasively | |
990 gvn.transform_no_reclaim(top()); | |
991 | |
992 GraphKit kit; | |
993 kit.gen_stub(stub_function, stub_name, is_fancy_jump, pass_tls, return_pc); | |
994 } | |
995 | |
996 NOT_PRODUCT( verify_graph_edges(); ) | |
997 Code_Gen(); | |
998 if (failing()) return; | |
999 | |
1000 | |
1001 // Entry point will be accessed using compile->stub_entry_point(); | |
1002 if (code_buffer() == NULL) { | |
1003 Matcher::soft_match_failure(); | |
1004 } else { | |
1005 if (PrintAssembly && (WizardMode || Verbose)) | |
1006 tty->print_cr("### Stub::%s", stub_name); | |
1007 | |
1008 if (!failing()) { | |
1009 assert(_fixed_slots == 0, "no fixed slots used for runtime stubs"); | |
1010 | |
1011 // Make the NMethod | |
1012 // For now we mark the frame as never safe for profile stackwalking | |
1013 RuntimeStub *rs = RuntimeStub::new_runtime_stub(stub_name, | |
1014 code_buffer(), | |
1015 CodeOffsets::frame_never_safe, | |
1016 // _code_offsets.value(CodeOffsets::Frame_Complete), | |
1017 frame_size_in_words(), | |
1018 _oop_map_set, | |
1019 save_arg_registers); | |
1020 assert(rs != NULL && rs->is_runtime_stub(), "sanity check"); | |
1021 | |
1022 _stub_entry_point = rs->entry_point(); | |
1023 } | |
1024 } | |
1025 } | |
1026 | |
1027 //------------------------------Init------------------------------------------- | |
1028 // Prepare for a single compilation | |
1029 void Compile::Init(int aliaslevel) { | |
1030 _unique = 0; | |
1031 _regalloc = NULL; | |
1032 | |
1033 _tf = NULL; // filled in later | |
1034 _top = NULL; // cached later | |
1035 _matcher = NULL; // filled in later | |
1036 _cfg = NULL; // filled in later | |
1037 | |
1038 set_24_bit_selection_and_mode(Use24BitFP, false); | |
1039 | |
1040 _node_note_array = NULL; | |
1041 _default_node_notes = NULL; | |
1042 | |
1043 _immutable_memory = NULL; // filled in at first inquiry | |
1044 | |
1045 // Globally visible Nodes | |
1046 // First set TOP to NULL to give safe behavior during creation of RootNode | |
1047 set_cached_top_node(NULL); | |
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1048 set_root(new (this) RootNode()); |
0 | 1049 // Now that you have a Root to point to, create the real TOP |
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1050 set_cached_top_node( new (this) ConNode(Type::TOP) ); |
0 | 1051 set_recent_alloc(NULL, NULL); |
1052 | |
1053 // Create Debug Information Recorder to record scopes, oopmaps, etc. | |
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1054 env()->set_oop_recorder(new OopRecorder(env()->arena())); |
0 | 1055 env()->set_debug_info(new DebugInformationRecorder(env()->oop_recorder())); |
1056 env()->set_dependencies(new Dependencies(env())); | |
1057 | |
1058 _fixed_slots = 0; | |
1059 set_has_split_ifs(false); | |
1060 set_has_loops(has_method() && method()->has_loops()); // first approximation | |
1080
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1061 set_has_stringbuilder(false); |
10278 | 1062 set_has_boxed_value(false); |
0 | 1063 _trap_can_recompile = false; // no traps emitted yet |
1064 _major_progress = true; // start out assuming good things will happen | |
1065 set_has_unsafe_access(false); | |
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1066 set_max_vector_size(0); |
0 | 1067 Copy::zero_to_bytes(_trap_hist, sizeof(_trap_hist)); |
1068 set_decompile_count(0); | |
1069 | |
418 | 1070 set_do_freq_based_layout(BlockLayoutByFrequency || method_has_option("BlockLayoutByFrequency")); |
1783 | 1071 set_num_loop_opts(LoopOptsCount); |
1072 set_do_inlining(Inline); | |
1073 set_max_inline_size(MaxInlineSize); | |
1074 set_freq_inline_size(FreqInlineSize); | |
1075 set_do_scheduling(OptoScheduling); | |
1076 set_do_count_invocations(false); | |
1077 set_do_method_data_update(false); | |
17780 | 1078 set_rtm_state(NoRTM); // No RTM lock eliding by default |
1079 #if INCLUDE_RTM_OPT | |
1080 if (UseRTMLocking && has_method() && (method()->method_data_or_null() != NULL)) { | |
1081 int rtm_state = method()->method_data()->rtm_state(); | |
1082 if (method_has_option("NoRTMLockEliding") || ((rtm_state & NoRTM) != 0)) { | |
1083 // Don't generate RTM lock eliding code. | |
1084 set_rtm_state(NoRTM); | |
1085 } else if (method_has_option("UseRTMLockEliding") || ((rtm_state & UseRTM) != 0) || !UseRTMDeopt) { | |
1086 // Generate RTM lock eliding code without abort ratio calculation code. | |
1087 set_rtm_state(UseRTM); | |
1088 } else if (UseRTMDeopt) { | |
1089 // Generate RTM lock eliding code and include abort ratio calculation | |
1090 // code if UseRTMDeopt is on. | |
1091 set_rtm_state(ProfileRTM); | |
1092 } | |
1093 } | |
1094 #endif | |
0 | 1095 if (debug_info()->recording_non_safepoints()) { |
1096 set_node_note_array(new(comp_arena()) GrowableArray<Node_Notes*> | |
1097 (comp_arena(), 8, 0, NULL)); | |
1098 set_default_node_notes(Node_Notes::make(this)); | |
1099 } | |
1100 | |
1101 // // -- Initialize types before each compile -- | |
1102 // // Update cached type information | |
1103 // if( _method && _method->constants() ) | |
1104 // Type::update_loaded_types(_method, _method->constants()); | |
1105 | |
1106 // Init alias_type map. | |
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1107 if (!_do_escape_analysis && aliaslevel == 3) |
0 | 1108 aliaslevel = 2; // No unique types without escape analysis |
1109 _AliasLevel = aliaslevel; | |
1110 const int grow_ats = 16; | |
1111 _max_alias_types = grow_ats; | |
1112 _alias_types = NEW_ARENA_ARRAY(comp_arena(), AliasType*, grow_ats); | |
1113 AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, grow_ats); | |
1114 Copy::zero_to_bytes(ats, sizeof(AliasType)*grow_ats); | |
1115 { | |
1116 for (int i = 0; i < grow_ats; i++) _alias_types[i] = &ats[i]; | |
1117 } | |
1118 // Initialize the first few types. | |
1119 _alias_types[AliasIdxTop]->Init(AliasIdxTop, NULL); | |
1120 _alias_types[AliasIdxBot]->Init(AliasIdxBot, TypePtr::BOTTOM); | |
1121 _alias_types[AliasIdxRaw]->Init(AliasIdxRaw, TypeRawPtr::BOTTOM); | |
1122 _num_alias_types = AliasIdxRaw+1; | |
1123 // Zero out the alias type cache. | |
1124 Copy::zero_to_bytes(_alias_cache, sizeof(_alias_cache)); | |
1125 // A NULL adr_type hits in the cache right away. Preload the right answer. | |
1126 probe_alias_cache(NULL)->_index = AliasIdxTop; | |
1127 | |
1128 _intrinsics = NULL; | |
1685 | 1129 _macro_nodes = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); |
1130 _predicate_opaqs = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); | |
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1131 _expensive_nodes = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); |
0 | 1132 register_library_intrinsics(); |
1133 } | |
1134 | |
1135 //---------------------------init_start---------------------------------------- | |
1136 // Install the StartNode on this compile object. | |
1137 void Compile::init_start(StartNode* s) { | |
1138 if (failing()) | |
1139 return; // already failing | |
1140 assert(s == start(), ""); | |
1141 } | |
1142 | |
1143 StartNode* Compile::start() const { | |
1144 assert(!failing(), ""); | |
1145 for (DUIterator_Fast imax, i = root()->fast_outs(imax); i < imax; i++) { | |
1146 Node* start = root()->fast_out(i); | |
1147 if( start->is_Start() ) | |
1148 return start->as_Start(); | |
1149 } | |
1150 ShouldNotReachHere(); | |
1151 return NULL; | |
1152 } | |
1153 | |
1154 //-------------------------------immutable_memory------------------------------------- | |
1155 // Access immutable memory | |
1156 Node* Compile::immutable_memory() { | |
1157 if (_immutable_memory != NULL) { | |
1158 return _immutable_memory; | |
1159 } | |
1160 StartNode* s = start(); | |
1161 for (DUIterator_Fast imax, i = s->fast_outs(imax); true; i++) { | |
1162 Node *p = s->fast_out(i); | |
1163 if (p != s && p->as_Proj()->_con == TypeFunc::Memory) { | |
1164 _immutable_memory = p; | |
1165 return _immutable_memory; | |
1166 } | |
1167 } | |
1168 ShouldNotReachHere(); | |
1169 return NULL; | |
1170 } | |
1171 | |
1172 //----------------------set_cached_top_node------------------------------------ | |
1173 // Install the cached top node, and make sure Node::is_top works correctly. | |
1174 void Compile::set_cached_top_node(Node* tn) { | |
1175 if (tn != NULL) verify_top(tn); | |
1176 Node* old_top = _top; | |
1177 _top = tn; | |
1178 // Calling Node::setup_is_top allows the nodes the chance to adjust | |
1179 // their _out arrays. | |
1180 if (_top != NULL) _top->setup_is_top(); | |
1181 if (old_top != NULL) old_top->setup_is_top(); | |
1182 assert(_top == NULL || top()->is_top(), ""); | |
1183 } | |
1184 | |
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1185 #ifdef ASSERT |
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1186 uint Compile::count_live_nodes_by_graph_walk() { |
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1187 Unique_Node_List useful(comp_arena()); |
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1188 // Get useful node list by walking the graph. |
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1189 identify_useful_nodes(useful); |
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1190 return useful.size(); |
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1191 } |
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1192 |
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1193 void Compile::print_missing_nodes() { |
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1194 |
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1195 // Return if CompileLog is NULL and PrintIdealNodeCount is false. |
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1196 if ((_log == NULL) && (! PrintIdealNodeCount)) { |
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1197 return; |
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1198 } |
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1199 |
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1200 // This is an expensive function. It is executed only when the user |
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1201 // specifies VerifyIdealNodeCount option or otherwise knows the |
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1202 // additional work that needs to be done to identify reachable nodes |
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1203 // by walking the flow graph and find the missing ones using |
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1204 // _dead_node_list. |
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1205 |
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1206 Unique_Node_List useful(comp_arena()); |
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1207 // Get useful node list by walking the graph. |
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1208 identify_useful_nodes(useful); |
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1209 |
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1210 uint l_nodes = C->live_nodes(); |
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1211 uint l_nodes_by_walk = useful.size(); |
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1212 |
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1213 if (l_nodes != l_nodes_by_walk) { |
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1214 if (_log != NULL) { |
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1215 _log->begin_head("mismatched_nodes count='%d'", abs((int) (l_nodes - l_nodes_by_walk))); |
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1216 _log->stamp(); |
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1217 _log->end_head(); |
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1218 } |
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1219 VectorSet& useful_member_set = useful.member_set(); |
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1220 int last_idx = l_nodes_by_walk; |
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1221 for (int i = 0; i < last_idx; i++) { |
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1222 if (useful_member_set.test(i)) { |
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1223 if (_dead_node_list.test(i)) { |
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1224 if (_log != NULL) { |
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1225 _log->elem("mismatched_node_info node_idx='%d' type='both live and dead'", i); |
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1226 } |
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1227 if (PrintIdealNodeCount) { |
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1228 // Print the log message to tty |
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1229 tty->print_cr("mismatched_node idx='%d' both live and dead'", i); |
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1230 useful.at(i)->dump(); |
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1231 } |
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1232 } |
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1233 } |
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1234 else if (! _dead_node_list.test(i)) { |
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1235 if (_log != NULL) { |
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1236 _log->elem("mismatched_node_info node_idx='%d' type='neither live nor dead'", i); |
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1237 } |
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1238 if (PrintIdealNodeCount) { |
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1239 // Print the log message to tty |
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1240 tty->print_cr("mismatched_node idx='%d' type='neither live nor dead'", i); |
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1241 } |
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1242 } |
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1243 } |
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1244 if (_log != NULL) { |
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1245 _log->tail("mismatched_nodes"); |
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1246 } |
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1247 } |
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1248 } |
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1249 #endif |
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1250 |
0 | 1251 #ifndef PRODUCT |
1252 void Compile::verify_top(Node* tn) const { | |
1253 if (tn != NULL) { | |
1254 assert(tn->is_Con(), "top node must be a constant"); | |
1255 assert(((ConNode*)tn)->type() == Type::TOP, "top node must have correct type"); | |
1256 assert(tn->in(0) != NULL, "must have live top node"); | |
1257 } | |
1258 } | |
1259 #endif | |
1260 | |
1261 | |
1262 ///-------------------Managing Per-Node Debug & Profile Info------------------- | |
1263 | |
1264 void Compile::grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by) { | |
1265 guarantee(arr != NULL, ""); | |
1266 int num_blocks = arr->length(); | |
1267 if (grow_by < num_blocks) grow_by = num_blocks; | |
1268 int num_notes = grow_by * _node_notes_block_size; | |
1269 Node_Notes* notes = NEW_ARENA_ARRAY(node_arena(), Node_Notes, num_notes); | |
1270 Copy::zero_to_bytes(notes, num_notes * sizeof(Node_Notes)); | |
1271 while (num_notes > 0) { | |
1272 arr->append(notes); | |
1273 notes += _node_notes_block_size; | |
1274 num_notes -= _node_notes_block_size; | |
1275 } | |
1276 assert(num_notes == 0, "exact multiple, please"); | |
1277 } | |
1278 | |
1279 bool Compile::copy_node_notes_to(Node* dest, Node* source) { | |
1280 if (source == NULL || dest == NULL) return false; | |
1281 | |
1282 if (dest->is_Con()) | |
1283 return false; // Do not push debug info onto constants. | |
1284 | |
1285 #ifdef ASSERT | |
1286 // Leave a bread crumb trail pointing to the original node: | |
1287 if (dest != NULL && dest != source && dest->debug_orig() == NULL) { | |
1288 dest->set_debug_orig(source); | |
1289 } | |
1290 #endif | |
1291 | |
1292 if (node_note_array() == NULL) | |
1293 return false; // Not collecting any notes now. | |
1294 | |
1295 // This is a copy onto a pre-existing node, which may already have notes. | |
1296 // If both nodes have notes, do not overwrite any pre-existing notes. | |
1297 Node_Notes* source_notes = node_notes_at(source->_idx); | |
1298 if (source_notes == NULL || source_notes->is_clear()) return false; | |
1299 Node_Notes* dest_notes = node_notes_at(dest->_idx); | |
1300 if (dest_notes == NULL || dest_notes->is_clear()) { | |
1301 return set_node_notes_at(dest->_idx, source_notes); | |
1302 } | |
1303 | |
1304 Node_Notes merged_notes = (*source_notes); | |
1305 // The order of operations here ensures that dest notes will win... | |
1306 merged_notes.update_from(dest_notes); | |
1307 return set_node_notes_at(dest->_idx, &merged_notes); | |
1308 } | |
1309 | |
1310 | |
1311 //--------------------------allow_range_check_smearing------------------------- | |
1312 // Gating condition for coalescing similar range checks. | |
1313 // Sometimes we try 'speculatively' replacing a series of a range checks by a | |
1314 // single covering check that is at least as strong as any of them. | |
1315 // If the optimization succeeds, the simplified (strengthened) range check | |
1316 // will always succeed. If it fails, we will deopt, and then give up | |
1317 // on the optimization. | |
1318 bool Compile::allow_range_check_smearing() const { | |
1319 // If this method has already thrown a range-check, | |
1320 // assume it was because we already tried range smearing | |
1321 // and it failed. | |
1322 uint already_trapped = trap_count(Deoptimization::Reason_range_check); | |
1323 return !already_trapped; | |
1324 } | |
1325 | |
1326 | |
1327 //------------------------------flatten_alias_type----------------------------- | |
1328 const TypePtr *Compile::flatten_alias_type( const TypePtr *tj ) const { | |
1329 int offset = tj->offset(); | |
1330 TypePtr::PTR ptr = tj->ptr(); | |
1331 | |
247 | 1332 // Known instance (scalarizable allocation) alias only with itself. |
1333 bool is_known_inst = tj->isa_oopptr() != NULL && | |
1334 tj->is_oopptr()->is_known_instance(); | |
1335 | |
0 | 1336 // Process weird unsafe references. |
1337 if (offset == Type::OffsetBot && (tj->isa_instptr() /*|| tj->isa_klassptr()*/)) { | |
1338 assert(InlineUnsafeOps, "indeterminate pointers come only from unsafe ops"); | |
247 | 1339 assert(!is_known_inst, "scalarizable allocation should not have unsafe references"); |
0 | 1340 tj = TypeOopPtr::BOTTOM; |
1341 ptr = tj->ptr(); | |
1342 offset = tj->offset(); | |
1343 } | |
1344 | |
1345 // Array pointers need some flattening | |
1346 const TypeAryPtr *ta = tj->isa_aryptr(); | |
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1347 if (ta && ta->is_stable()) { |
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1349 tj = ta = ta->cast_to_stable(false); |
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1350 } |
247 | 1351 if( ta && is_known_inst ) { |
1352 if ( offset != Type::OffsetBot && | |
1353 offset > arrayOopDesc::length_offset_in_bytes() ) { | |
1354 offset = Type::OffsetBot; // Flatten constant access into array body only | |
1355 tj = ta = TypeAryPtr::make(ptr, ta->ary(), ta->klass(), true, offset, ta->instance_id()); | |
1356 } | |
1357 } else if( ta && _AliasLevel >= 2 ) { | |
0 | 1358 // For arrays indexed by constant indices, we flatten the alias |
1359 // space to include all of the array body. Only the header, klass | |
1360 // and array length can be accessed un-aliased. | |
1361 if( offset != Type::OffsetBot ) { | |
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1362 if( ta->const_oop() ) { // MethodData* or Method* |
0 | 1363 offset = Type::OffsetBot; // Flatten constant access into array body |
247 | 1364 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),ta->ary(),ta->klass(),false,offset); |
0 | 1365 } else if( offset == arrayOopDesc::length_offset_in_bytes() ) { |
1366 // range is OK as-is. | |
1367 tj = ta = TypeAryPtr::RANGE; | |
1368 } else if( offset == oopDesc::klass_offset_in_bytes() ) { | |
1369 tj = TypeInstPtr::KLASS; // all klass loads look alike | |
1370 ta = TypeAryPtr::RANGE; // generic ignored junk | |
1371 ptr = TypePtr::BotPTR; | |
1372 } else if( offset == oopDesc::mark_offset_in_bytes() ) { | |
1373 tj = TypeInstPtr::MARK; | |
1374 ta = TypeAryPtr::RANGE; // generic ignored junk | |
1375 ptr = TypePtr::BotPTR; | |
1376 } else { // Random constant offset into array body | |
1377 offset = Type::OffsetBot; // Flatten constant access into array body | |
247 | 1378 tj = ta = TypeAryPtr::make(ptr,ta->ary(),ta->klass(),false,offset); |
0 | 1379 } |
1380 } | |
1381 // Arrays of fixed size alias with arrays of unknown size. | |
1382 if (ta->size() != TypeInt::POS) { | |
1383 const TypeAry *tary = TypeAry::make(ta->elem(), TypeInt::POS); | |
247 | 1384 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,ta->klass(),false,offset); |
0 | 1385 } |
1386 // Arrays of known objects become arrays of unknown objects. | |
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1387 if (ta->elem()->isa_narrowoop() && ta->elem() != TypeNarrowOop::BOTTOM) { |
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1388 const TypeAry *tary = TypeAry::make(TypeNarrowOop::BOTTOM, ta->size()); |
247 | 1389 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset); |
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1390 } |
0 | 1391 if (ta->elem()->isa_oopptr() && ta->elem() != TypeInstPtr::BOTTOM) { |
1392 const TypeAry *tary = TypeAry::make(TypeInstPtr::BOTTOM, ta->size()); | |
247 | 1393 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset); |
0 | 1394 } |
1395 // Arrays of bytes and of booleans both use 'bastore' and 'baload' so | |
1396 // cannot be distinguished by bytecode alone. | |
1397 if (ta->elem() == TypeInt::BOOL) { | |
1398 const TypeAry *tary = TypeAry::make(TypeInt::BYTE, ta->size()); | |
1399 ciKlass* aklass = ciTypeArrayKlass::make(T_BYTE); | |
247 | 1400 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,aklass,false,offset); |
0 | 1401 } |
1402 // During the 2nd round of IterGVN, NotNull castings are removed. | |
1403 // Make sure the Bottom and NotNull variants alias the same. | |
1404 // Also, make sure exact and non-exact variants alias the same. | |
12966 | 1405 if (ptr == TypePtr::NotNull || ta->klass_is_exact() || ta->speculative() != NULL) { |
3789 | 1406 tj = ta = TypeAryPtr::make(TypePtr::BotPTR,ta->ary(),ta->klass(),false,offset); |
0 | 1407 } |
1408 } | |
1409 | |
1410 // Oop pointers need some flattening | |
1411 const TypeInstPtr *to = tj->isa_instptr(); | |
1412 if( to && _AliasLevel >= 2 && to != TypeOopPtr::BOTTOM ) { | |
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1413 ciInstanceKlass *k = to->klass()->as_instance_klass(); |
0 | 1414 if( ptr == TypePtr::Constant ) { |
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1415 if (to->klass() != ciEnv::current()->Class_klass() || |
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1416 offset < k->size_helper() * wordSize) { |
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1417 // No constant oop pointers (such as Strings); they alias with |
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1418 // unknown strings. |
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1419 assert(!is_known_inst, "not scalarizable allocation"); |
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1420 tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset); |
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1421 } |
247 | 1422 } else if( is_known_inst ) { |
163 | 1423 tj = to; // Keep NotNull and klass_is_exact for instance type |
0 | 1424 } else if( ptr == TypePtr::NotNull || to->klass_is_exact() ) { |
1425 // During the 2nd round of IterGVN, NotNull castings are removed. | |
1426 // Make sure the Bottom and NotNull variants alias the same. | |
1427 // Also, make sure exact and non-exact variants alias the same. | |
247 | 1428 tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset); |
0 | 1429 } |
12966 | 1430 if (to->speculative() != NULL) { |
1431 tj = to = TypeInstPtr::make(to->ptr(),to->klass(),to->klass_is_exact(),to->const_oop(),to->offset(), to->instance_id()); | |
1432 } | |
0 | 1433 // Canonicalize the holder of this field |
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1434 if (offset >= 0 && offset < instanceOopDesc::base_offset_in_bytes()) { |
0 | 1435 // First handle header references such as a LoadKlassNode, even if the |
1436 // object's klass is unloaded at compile time (4965979). | |
247 | 1437 if (!is_known_inst) { // Do it only for non-instance types |
1438 tj = to = TypeInstPtr::make(TypePtr::BotPTR, env()->Object_klass(), false, NULL, offset); | |
1439 } | |
0 | 1440 } else if (offset < 0 || offset >= k->size_helper() * wordSize) { |
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1441 // Static fields are in the space above the normal instance |
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1442 // fields in the java.lang.Class instance. |
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1443 if (to->klass() != ciEnv::current()->Class_klass()) { |
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1444 to = NULL; |
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1445 tj = TypeOopPtr::BOTTOM; |
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1446 offset = tj->offset(); |
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1447 } |
0 | 1448 } else { |
1449 ciInstanceKlass *canonical_holder = k->get_canonical_holder(offset); | |
1450 if (!k->equals(canonical_holder) || tj->offset() != offset) { | |
247 | 1451 if( is_known_inst ) { |
1452 tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, true, NULL, offset, to->instance_id()); | |
1453 } else { | |
1454 tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, false, NULL, offset); | |
1455 } | |
0 | 1456 } |
1457 } | |
1458 } | |
1459 | |
1460 // Klass pointers to object array klasses need some flattening | |
1461 const TypeKlassPtr *tk = tj->isa_klassptr(); | |
1462 if( tk ) { | |
1463 // If we are referencing a field within a Klass, we need | |
1464 // to assume the worst case of an Object. Both exact and | |
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1465 // inexact types must flatten to the same alias class so |
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1466 // use NotNull as the PTR. |
0 | 1467 if ( offset == Type::OffsetBot || (offset >= 0 && (size_t)offset < sizeof(Klass)) ) { |
1468 | |
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1469 tj = tk = TypeKlassPtr::make(TypePtr::NotNull, |
0 | 1470 TypeKlassPtr::OBJECT->klass(), |
1471 offset); | |
1472 } | |
1473 | |
1474 ciKlass* klass = tk->klass(); | |
1475 if( klass->is_obj_array_klass() ) { | |
1476 ciKlass* k = TypeAryPtr::OOPS->klass(); | |
1477 if( !k || !k->is_loaded() ) // Only fails for some -Xcomp runs | |
1478 k = TypeInstPtr::BOTTOM->klass(); | |
1479 tj = tk = TypeKlassPtr::make( TypePtr::NotNull, k, offset ); | |
1480 } | |
1481 | |
1482 // Check for precise loads from the primary supertype array and force them | |
1483 // to the supertype cache alias index. Check for generic array loads from | |
1484 // the primary supertype array and also force them to the supertype cache | |
1485 // alias index. Since the same load can reach both, we need to merge | |
1486 // these 2 disparate memories into the same alias class. Since the | |
1487 // primary supertype array is read-only, there's no chance of confusion | |
1488 // where we bypass an array load and an array store. | |
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1489 int primary_supers_offset = in_bytes(Klass::primary_supers_offset()); |
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1490 if (offset == Type::OffsetBot || |
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1491 (offset >= primary_supers_offset && |
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1492 offset < (int)(primary_supers_offset + Klass::primary_super_limit() * wordSize)) || |
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1493 offset == (int)in_bytes(Klass::secondary_super_cache_offset())) { |
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1494 offset = in_bytes(Klass::secondary_super_cache_offset()); |
0 | 1495 tj = tk = TypeKlassPtr::make( TypePtr::NotNull, tk->klass(), offset ); |
1496 } | |
1497 } | |
1498 | |
1499 // Flatten all Raw pointers together. | |
1500 if (tj->base() == Type::RawPtr) | |
1501 tj = TypeRawPtr::BOTTOM; | |
1502 | |
1503 if (tj->base() == Type::AnyPtr) | |
1504 tj = TypePtr::BOTTOM; // An error, which the caller must check for. | |
1505 | |
1506 // Flatten all to bottom for now | |
1507 switch( _AliasLevel ) { | |
1508 case 0: | |
1509 tj = TypePtr::BOTTOM; | |
1510 break; | |
1511 case 1: // Flatten to: oop, static, field or array | |
1512 switch (tj->base()) { | |
1513 //case Type::AryPtr: tj = TypeAryPtr::RANGE; break; | |
1514 case Type::RawPtr: tj = TypeRawPtr::BOTTOM; break; | |
1515 case Type::AryPtr: // do not distinguish arrays at all | |
1516 case Type::InstPtr: tj = TypeInstPtr::BOTTOM; break; | |
1517 case Type::KlassPtr: tj = TypeKlassPtr::OBJECT; break; | |
1518 case Type::AnyPtr: tj = TypePtr::BOTTOM; break; // caller checks it | |
1519 default: ShouldNotReachHere(); | |
1520 } | |
1521 break; | |
605 | 1522 case 2: // No collapsing at level 2; keep all splits |
1523 case 3: // No collapsing at level 3; keep all splits | |
0 | 1524 break; |
1525 default: | |
1526 Unimplemented(); | |
1527 } | |
1528 | |
1529 offset = tj->offset(); | |
1530 assert( offset != Type::OffsetTop, "Offset has fallen from constant" ); | |
1531 | |
1532 assert( (offset != Type::OffsetBot && tj->base() != Type::AryPtr) || | |
1533 (offset == Type::OffsetBot && tj->base() == Type::AryPtr) || | |
1534 (offset == Type::OffsetBot && tj == TypeOopPtr::BOTTOM) || | |
1535 (offset == Type::OffsetBot && tj == TypePtr::BOTTOM) || | |
1536 (offset == oopDesc::mark_offset_in_bytes() && tj->base() == Type::AryPtr) || | |
1537 (offset == oopDesc::klass_offset_in_bytes() && tj->base() == Type::AryPtr) || | |
1538 (offset == arrayOopDesc::length_offset_in_bytes() && tj->base() == Type::AryPtr) , | |
1539 "For oops, klasses, raw offset must be constant; for arrays the offset is never known" ); | |
1540 assert( tj->ptr() != TypePtr::TopPTR && | |
1541 tj->ptr() != TypePtr::AnyNull && | |
1542 tj->ptr() != TypePtr::Null, "No imprecise addresses" ); | |
1543 // assert( tj->ptr() != TypePtr::Constant || | |
1544 // tj->base() == Type::RawPtr || | |
1545 // tj->base() == Type::KlassPtr, "No constant oop addresses" ); | |
1546 | |
1547 return tj; | |
1548 } | |
1549 | |
1550 void Compile::AliasType::Init(int i, const TypePtr* at) { | |
1551 _index = i; | |
1552 _adr_type = at; | |
1553 _field = NULL; | |
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1554 _element = NULL; |
0 | 1555 _is_rewritable = true; // default |
1556 const TypeOopPtr *atoop = (at != NULL) ? at->isa_oopptr() : NULL; | |
223 | 1557 if (atoop != NULL && atoop->is_known_instance()) { |
1558 const TypeOopPtr *gt = atoop->cast_to_instance_id(TypeOopPtr::InstanceBot); | |
0 | 1559 _general_index = Compile::current()->get_alias_index(gt); |
1560 } else { | |
1561 _general_index = 0; | |
1562 } | |
1563 } | |
1564 | |
1565 //---------------------------------print_on------------------------------------ | |
1566 #ifndef PRODUCT | |
1567 void Compile::AliasType::print_on(outputStream* st) { | |
1568 if (index() < 10) | |
1569 st->print("@ <%d> ", index()); | |
1570 else st->print("@ <%d>", index()); | |
1571 st->print(is_rewritable() ? " " : " RO"); | |
1572 int offset = adr_type()->offset(); | |
1573 if (offset == Type::OffsetBot) | |
1574 st->print(" +any"); | |
1575 else st->print(" +%-3d", offset); | |
1576 st->print(" in "); | |
1577 adr_type()->dump_on(st); | |
1578 const TypeOopPtr* tjp = adr_type()->isa_oopptr(); | |
1579 if (field() != NULL && tjp) { | |
1580 if (tjp->klass() != field()->holder() || | |
1581 tjp->offset() != field()->offset_in_bytes()) { | |
1582 st->print(" != "); | |
1583 field()->print(); | |
1584 st->print(" ***"); | |
1585 } | |
1586 } | |
1587 } | |
1588 | |
1589 void print_alias_types() { | |
1590 Compile* C = Compile::current(); | |
1591 tty->print_cr("--- Alias types, AliasIdxBot .. %d", C->num_alias_types()-1); | |
1592 for (int idx = Compile::AliasIdxBot; idx < C->num_alias_types(); idx++) { | |
1593 C->alias_type(idx)->print_on(tty); | |
1594 tty->cr(); | |
1595 } | |
1596 } | |
1597 #endif | |
1598 | |
1599 | |
1600 //----------------------------probe_alias_cache-------------------------------- | |
1601 Compile::AliasCacheEntry* Compile::probe_alias_cache(const TypePtr* adr_type) { | |
1602 intptr_t key = (intptr_t) adr_type; | |
1603 key ^= key >> logAliasCacheSize; | |
1604 return &_alias_cache[key & right_n_bits(logAliasCacheSize)]; | |
1605 } | |
1606 | |
1607 | |
1608 //-----------------------------grow_alias_types-------------------------------- | |
1609 void Compile::grow_alias_types() { | |
1610 const int old_ats = _max_alias_types; // how many before? | |
1611 const int new_ats = old_ats; // how many more? | |
1612 const int grow_ats = old_ats+new_ats; // how many now? | |
1613 _max_alias_types = grow_ats; | |
1614 _alias_types = REALLOC_ARENA_ARRAY(comp_arena(), AliasType*, _alias_types, old_ats, grow_ats); | |
1615 AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, new_ats); | |
1616 Copy::zero_to_bytes(ats, sizeof(AliasType)*new_ats); | |
1617 for (int i = 0; i < new_ats; i++) _alias_types[old_ats+i] = &ats[i]; | |
1618 } | |
1619 | |
1620 | |
1621 //--------------------------------find_alias_type------------------------------ | |
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1622 Compile::AliasType* Compile::find_alias_type(const TypePtr* adr_type, bool no_create, ciField* original_field) { |
0 | 1623 if (_AliasLevel == 0) |
1624 return alias_type(AliasIdxBot); | |
1625 | |
1626 AliasCacheEntry* ace = probe_alias_cache(adr_type); | |
1627 if (ace->_adr_type == adr_type) { | |
1628 return alias_type(ace->_index); | |
1629 } | |
1630 | |
1631 // Handle special cases. | |
1632 if (adr_type == NULL) return alias_type(AliasIdxTop); | |
1633 if (adr_type == TypePtr::BOTTOM) return alias_type(AliasIdxBot); | |
1634 | |
1635 // Do it the slow way. | |
1636 const TypePtr* flat = flatten_alias_type(adr_type); | |
1637 | |
1638 #ifdef ASSERT | |
1639 assert(flat == flatten_alias_type(flat), "idempotent"); | |
1640 assert(flat != TypePtr::BOTTOM, "cannot alias-analyze an untyped ptr"); | |
1641 if (flat->isa_oopptr() && !flat->isa_klassptr()) { | |
1642 const TypeOopPtr* foop = flat->is_oopptr(); | |
247 | 1643 // Scalarizable allocations have exact klass always. |
1644 bool exact = !foop->klass_is_exact() || foop->is_known_instance(); | |
1645 const TypePtr* xoop = foop->cast_to_exactness(exact)->is_ptr(); | |
0 | 1646 assert(foop == flatten_alias_type(xoop), "exactness must not affect alias type"); |
1647 } | |
1648 assert(flat == flatten_alias_type(flat), "exact bit doesn't matter"); | |
1649 #endif | |
1650 | |
1651 int idx = AliasIdxTop; | |
1652 for (int i = 0; i < num_alias_types(); i++) { | |
1653 if (alias_type(i)->adr_type() == flat) { | |
1654 idx = i; | |
1655 break; | |
1656 } | |
1657 } | |
1658 | |
1659 if (idx == AliasIdxTop) { | |
1660 if (no_create) return NULL; | |
1661 // Grow the array if necessary. | |
1662 if (_num_alias_types == _max_alias_types) grow_alias_types(); | |
1663 // Add a new alias type. | |
1664 idx = _num_alias_types++; | |
1665 _alias_types[idx]->Init(idx, flat); | |
1666 if (flat == TypeInstPtr::KLASS) alias_type(idx)->set_rewritable(false); | |
1667 if (flat == TypeAryPtr::RANGE) alias_type(idx)->set_rewritable(false); | |
1668 if (flat->isa_instptr()) { | |
1669 if (flat->offset() == java_lang_Class::klass_offset_in_bytes() | |
1670 && flat->is_instptr()->klass() == env()->Class_klass()) | |
1671 alias_type(idx)->set_rewritable(false); | |
1672 } | |
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1673 if (flat->isa_aryptr()) { |
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1674 #ifdef ASSERT |
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1675 const int header_size_min = arrayOopDesc::base_offset_in_bytes(T_BYTE); |
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1676 // (T_BYTE has the weakest alignment and size restrictions...) |
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1677 assert(flat->offset() < header_size_min, "array body reference must be OffsetBot"); |
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1678 #endif |
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1679 if (flat->offset() == TypePtr::OffsetBot) { |
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1680 alias_type(idx)->set_element(flat->is_aryptr()->elem()); |
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1681 } |
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1682 } |
0 | 1683 if (flat->isa_klassptr()) { |
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1684 if (flat->offset() == in_bytes(Klass::super_check_offset_offset())) |
0 | 1685 alias_type(idx)->set_rewritable(false); |
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1686 if (flat->offset() == in_bytes(Klass::modifier_flags_offset())) |
0 | 1687 alias_type(idx)->set_rewritable(false); |
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1688 if (flat->offset() == in_bytes(Klass::access_flags_offset())) |
0 | 1689 alias_type(idx)->set_rewritable(false); |
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1690 if (flat->offset() == in_bytes(Klass::java_mirror_offset())) |
0 | 1691 alias_type(idx)->set_rewritable(false); |
1692 } | |
1693 // %%% (We would like to finalize JavaThread::threadObj_offset(), | |
1694 // but the base pointer type is not distinctive enough to identify | |
1695 // references into JavaThread.) | |
1696 | |
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1697 // Check for final fields. |
0 | 1698 const TypeInstPtr* tinst = flat->isa_instptr(); |
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1699 if (tinst && tinst->offset() >= instanceOopDesc::base_offset_in_bytes()) { |
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1700 ciField* field; |
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1701 if (tinst->const_oop() != NULL && |
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1702 tinst->klass() == ciEnv::current()->Class_klass() && |
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1703 tinst->offset() >= (tinst->klass()->as_instance_klass()->size_helper() * wordSize)) { |
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1704 // static field |
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1705 ciInstanceKlass* k = tinst->const_oop()->as_instance()->java_lang_Class_klass()->as_instance_klass(); |
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1706 field = k->get_field_by_offset(tinst->offset(), true); |
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1707 } else { |
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1708 ciInstanceKlass *k = tinst->klass()->as_instance_klass(); |
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1709 field = k->get_field_by_offset(tinst->offset(), false); |
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1710 } |
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1711 assert(field == NULL || |
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1712 original_field == NULL || |
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1713 (field->holder() == original_field->holder() && |
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1714 field->offset() == original_field->offset() && |
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1715 field->is_static() == original_field->is_static()), "wrong field?"); |
0 | 1716 // Set field() and is_rewritable() attributes. |
1717 if (field != NULL) alias_type(idx)->set_field(field); | |
1718 } | |
1719 } | |
1720 | |
1721 // Fill the cache for next time. | |
1722 ace->_adr_type = adr_type; | |
1723 ace->_index = idx; | |
1724 assert(alias_type(adr_type) == alias_type(idx), "type must be installed"); | |
1725 | |
1726 // Might as well try to fill the cache for the flattened version, too. | |
1727 AliasCacheEntry* face = probe_alias_cache(flat); | |
1728 if (face->_adr_type == NULL) { | |
1729 face->_adr_type = flat; | |
1730 face->_index = idx; | |
1731 assert(alias_type(flat) == alias_type(idx), "flat type must work too"); | |
1732 } | |
1733 | |
1734 return alias_type(idx); | |
1735 } | |
1736 | |
1737 | |
1738 Compile::AliasType* Compile::alias_type(ciField* field) { | |
1739 const TypeOopPtr* t; | |
1740 if (field->is_static()) | |
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1741 t = TypeInstPtr::make(field->holder()->java_mirror()); |
0 | 1742 else |
1743 t = TypeOopPtr::make_from_klass_raw(field->holder()); | |
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1744 AliasType* atp = alias_type(t->add_offset(field->offset_in_bytes()), field); |
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1745 assert((field->is_final() || field->is_stable()) == !atp->is_rewritable(), "must get the rewritable bits correct"); |
0 | 1746 return atp; |
1747 } | |
1748 | |
1749 | |
1750 //------------------------------have_alias_type-------------------------------- | |
1751 bool Compile::have_alias_type(const TypePtr* adr_type) { | |
1752 AliasCacheEntry* ace = probe_alias_cache(adr_type); | |
1753 if (ace->_adr_type == adr_type) { | |
1754 return true; | |
1755 } | |
1756 | |
1757 // Handle special cases. | |
1758 if (adr_type == NULL) return true; | |
1759 if (adr_type == TypePtr::BOTTOM) return true; | |
1760 | |
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1761 return find_alias_type(adr_type, true, NULL) != NULL; |
0 | 1762 } |
1763 | |
1764 //-----------------------------must_alias-------------------------------------- | |
1765 // True if all values of the given address type are in the given alias category. | |
1766 bool Compile::must_alias(const TypePtr* adr_type, int alias_idx) { | |
1767 if (alias_idx == AliasIdxBot) return true; // the universal category | |
1768 if (adr_type == NULL) return true; // NULL serves as TypePtr::TOP | |
1769 if (alias_idx == AliasIdxTop) return false; // the empty category | |
1770 if (adr_type->base() == Type::AnyPtr) return false; // TypePtr::BOTTOM or its twins | |
1771 | |
1772 // the only remaining possible overlap is identity | |
1773 int adr_idx = get_alias_index(adr_type); | |
1774 assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, ""); | |
1775 assert(adr_idx == alias_idx || | |
1776 (alias_type(alias_idx)->adr_type() != TypeOopPtr::BOTTOM | |
1777 && adr_type != TypeOopPtr::BOTTOM), | |
1778 "should not be testing for overlap with an unsafe pointer"); | |
1779 return adr_idx == alias_idx; | |
1780 } | |
1781 | |
1782 //------------------------------can_alias-------------------------------------- | |
1783 // True if any values of the given address type are in the given alias category. | |
1784 bool Compile::can_alias(const TypePtr* adr_type, int alias_idx) { | |
1785 if (alias_idx == AliasIdxTop) return false; // the empty category | |
1786 if (adr_type == NULL) return false; // NULL serves as TypePtr::TOP | |
1787 if (alias_idx == AliasIdxBot) return true; // the universal category | |
1788 if (adr_type->base() == Type::AnyPtr) return true; // TypePtr::BOTTOM or its twins | |
1789 | |
1790 // the only remaining possible overlap is identity | |
1791 int adr_idx = get_alias_index(adr_type); | |
1792 assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, ""); | |
1793 return adr_idx == alias_idx; | |
1794 } | |
1795 | |
1796 | |
1797 | |
1798 //---------------------------pop_warm_call------------------------------------- | |
1799 WarmCallInfo* Compile::pop_warm_call() { | |
1800 WarmCallInfo* wci = _warm_calls; | |
1801 if (wci != NULL) _warm_calls = wci->remove_from(wci); | |
1802 return wci; | |
1803 } | |
1804 | |
1805 //----------------------------Inline_Warm-------------------------------------- | |
1806 int Compile::Inline_Warm() { | |
1807 // If there is room, try to inline some more warm call sites. | |
1808 // %%% Do a graph index compaction pass when we think we're out of space? | |
1809 if (!InlineWarmCalls) return 0; | |
1810 | |
1811 int calls_made_hot = 0; | |
1812 int room_to_grow = NodeCountInliningCutoff - unique(); | |
1813 int amount_to_grow = MIN2(room_to_grow, (int)NodeCountInliningStep); | |
1814 int amount_grown = 0; | |
1815 WarmCallInfo* call; | |
1816 while (amount_to_grow > 0 && (call = pop_warm_call()) != NULL) { | |
1817 int est_size = (int)call->size(); | |
1818 if (est_size > (room_to_grow - amount_grown)) { | |
1819 // This one won't fit anyway. Get rid of it. | |
1820 call->make_cold(); | |
1821 continue; | |
1822 } | |
1823 call->make_hot(); | |
1824 calls_made_hot++; | |
1825 amount_grown += est_size; | |
1826 amount_to_grow -= est_size; | |
1827 } | |
1828 | |
1829 if (calls_made_hot > 0) set_major_progress(); | |
1830 return calls_made_hot; | |
1831 } | |
1832 | |
1833 | |
1834 //----------------------------Finish_Warm-------------------------------------- | |
1835 void Compile::Finish_Warm() { | |
1836 if (!InlineWarmCalls) return; | |
1837 if (failing()) return; | |
1838 if (warm_calls() == NULL) return; | |
1839 | |
1840 // Clean up loose ends, if we are out of space for inlining. | |
1841 WarmCallInfo* call; | |
1842 while ((call = pop_warm_call()) != NULL) { | |
1843 call->make_cold(); | |
1844 } | |
1845 } | |
1846 | |
1172 | 1847 //---------------------cleanup_loop_predicates----------------------- |
1848 // Remove the opaque nodes that protect the predicates so that all unused | |
1849 // checks and uncommon_traps will be eliminated from the ideal graph | |
1850 void Compile::cleanup_loop_predicates(PhaseIterGVN &igvn) { | |
1851 if (predicate_count()==0) return; | |
1852 for (int i = predicate_count(); i > 0; i--) { | |
1853 Node * n = predicate_opaque1_node(i-1); | |
1854 assert(n->Opcode() == Op_Opaque1, "must be"); | |
1855 igvn.replace_node(n, n->in(1)); | |
1856 } | |
1857 assert(predicate_count()==0, "should be clean!"); | |
1858 } | |
0 | 1859 |
7473 | 1860 // StringOpts and late inlining of string methods |
1861 void Compile::inline_string_calls(bool parse_time) { | |
1862 { | |
1863 // remove useless nodes to make the usage analysis simpler | |
1864 ResourceMark rm; | |
1865 PhaseRemoveUseless pru(initial_gvn(), for_igvn()); | |
1866 } | |
1867 | |
1868 { | |
1869 ResourceMark rm; | |
10405 | 1870 print_method(PHASE_BEFORE_STRINGOPTS, 3); |
7473 | 1871 PhaseStringOpts pso(initial_gvn(), for_igvn()); |
10405 | 1872 print_method(PHASE_AFTER_STRINGOPTS, 3); |
7473 | 1873 } |
1874 | |
1875 // now inline anything that we skipped the first time around | |
1876 if (!parse_time) { | |
1877 _late_inlines_pos = _late_inlines.length(); | |
1878 } | |
1879 | |
1880 while (_string_late_inlines.length() > 0) { | |
1881 CallGenerator* cg = _string_late_inlines.pop(); | |
1882 cg->do_late_inline(); | |
1883 if (failing()) return; | |
1884 } | |
1885 _string_late_inlines.trunc_to(0); | |
1886 } | |
1887 | |
10278 | 1888 // Late inlining of boxing methods |
1889 void Compile::inline_boxing_calls(PhaseIterGVN& igvn) { | |
1890 if (_boxing_late_inlines.length() > 0) { | |
1891 assert(has_boxed_value(), "inconsistent"); | |
1892 | |
1893 PhaseGVN* gvn = initial_gvn(); | |
1894 set_inlining_incrementally(true); | |
1895 | |
1896 assert( igvn._worklist.size() == 0, "should be done with igvn" ); | |
1897 for_igvn()->clear(); | |
1898 gvn->replace_with(&igvn); | |
1899 | |
1900 while (_boxing_late_inlines.length() > 0) { | |
1901 CallGenerator* cg = _boxing_late_inlines.pop(); | |
1902 cg->do_late_inline(); | |
1903 if (failing()) return; | |
1904 } | |
1905 _boxing_late_inlines.trunc_to(0); | |
1906 | |
1907 { | |
1908 ResourceMark rm; | |
1909 PhaseRemoveUseless pru(gvn, for_igvn()); | |
1910 } | |
1911 | |
1912 igvn = PhaseIterGVN(gvn); | |
1913 igvn.optimize(); | |
1914 | |
1915 set_inlining_progress(false); | |
1916 set_inlining_incrementally(false); | |
1917 } | |
1918 } | |
1919 | |
7473 | 1920 void Compile::inline_incrementally_one(PhaseIterGVN& igvn) { |
1921 assert(IncrementalInline, "incremental inlining should be on"); | |
1922 PhaseGVN* gvn = initial_gvn(); | |
1923 | |
1924 set_inlining_progress(false); | |
1925 for_igvn()->clear(); | |
1926 gvn->replace_with(&igvn); | |
1927 | |
1928 int i = 0; | |
1929 | |
1930 for (; i <_late_inlines.length() && !inlining_progress(); i++) { | |
1931 CallGenerator* cg = _late_inlines.at(i); | |
1932 _late_inlines_pos = i+1; | |
1933 cg->do_late_inline(); | |
1934 if (failing()) return; | |
1935 } | |
1936 int j = 0; | |
1937 for (; i < _late_inlines.length(); i++, j++) { | |
1938 _late_inlines.at_put(j, _late_inlines.at(i)); | |
1939 } | |
1940 _late_inlines.trunc_to(j); | |
1941 | |
1942 { | |
1943 ResourceMark rm; | |
10278 | 1944 PhaseRemoveUseless pru(gvn, for_igvn()); |
7473 | 1945 } |
1946 | |
1947 igvn = PhaseIterGVN(gvn); | |
1948 } | |
1949 | |
1950 // Perform incremental inlining until bound on number of live nodes is reached | |
1951 void Compile::inline_incrementally(PhaseIterGVN& igvn) { | |
1952 PhaseGVN* gvn = initial_gvn(); | |
1953 | |
1954 set_inlining_incrementally(true); | |
1955 set_inlining_progress(true); | |
1956 uint low_live_nodes = 0; | |
1957 | |
1958 while(inlining_progress() && _late_inlines.length() > 0) { | |
1959 | |
1960 if (live_nodes() > (uint)LiveNodeCountInliningCutoff) { | |
1961 if (low_live_nodes < (uint)LiveNodeCountInliningCutoff * 8 / 10) { | |
1962 // PhaseIdealLoop is expensive so we only try it once we are | |
1963 // out of loop and we only try it again if the previous helped | |
1964 // got the number of nodes down significantly | |
1965 PhaseIdealLoop ideal_loop( igvn, false, true ); | |
1966 if (failing()) return; | |
1967 low_live_nodes = live_nodes(); | |
1968 _major_progress = true; | |
1969 } | |
1970 | |
1971 if (live_nodes() > (uint)LiveNodeCountInliningCutoff) { | |
1972 break; | |
1973 } | |
1974 } | |
1975 | |
1976 inline_incrementally_one(igvn); | |
1977 | |
1978 if (failing()) return; | |
1979 | |
1980 igvn.optimize(); | |
1981 | |
1982 if (failing()) return; | |
1983 } | |
1984 | |
1985 assert( igvn._worklist.size() == 0, "should be done with igvn" ); | |
1986 | |
1987 if (_string_late_inlines.length() > 0) { | |
1988 assert(has_stringbuilder(), "inconsistent"); | |
1989 for_igvn()->clear(); | |
1990 initial_gvn()->replace_with(&igvn); | |
1991 | |
1992 inline_string_calls(false); | |
1993 | |
1994 if (failing()) return; | |
1995 | |
1996 { | |
1997 ResourceMark rm; | |
1998 PhaseRemoveUseless pru(initial_gvn(), for_igvn()); | |
1999 } | |
2000 | |
2001 igvn = PhaseIterGVN(gvn); | |
2002 | |
2003 igvn.optimize(); | |
2004 } | |
2005 | |
2006 set_inlining_incrementally(false); | |
2007 } | |
2008 | |
2009 | |
0 | 2010 //------------------------------Optimize--------------------------------------- |
2011 // Given a graph, optimize it. | |
2012 void Compile::Optimize() { | |
2013 TracePhase t1("optimizer", &_t_optimizer, true); | |
2014 | |
2015 #ifndef PRODUCT | |
2016 if (env()->break_at_compile()) { | |
2017 BREAKPOINT; | |
2018 } | |
2019 | |
2020 #endif | |
2021 | |
2022 ResourceMark rm; | |
2023 int loop_opts_cnt; | |
2024 | |
2025 NOT_PRODUCT( verify_graph_edges(); ) | |
2026 | |
10405 | 2027 print_method(PHASE_AFTER_PARSING); |
0 | 2028 |
2029 { | |
2030 // Iterative Global Value Numbering, including ideal transforms | |
2031 // Initialize IterGVN with types and values from parse-time GVN | |
2032 PhaseIterGVN igvn(initial_gvn()); | |
2033 { | |
2034 NOT_PRODUCT( TracePhase t2("iterGVN", &_t_iterGVN, TimeCompiler); ) | |
2035 igvn.optimize(); | |
2036 } | |
2037 | |
10405 | 2038 print_method(PHASE_ITER_GVN1, 2); |
0 | 2039 |
2040 if (failing()) return; | |
2041 | |
10278 | 2042 { |
2043 NOT_PRODUCT( TracePhase t2("incrementalInline", &_t_incrInline, TimeCompiler); ) | |
2044 inline_incrementally(igvn); | |
2045 } | |
7473 | 2046 |
10405 | 2047 print_method(PHASE_INCREMENTAL_INLINE, 2); |
7473 | 2048 |
2049 if (failing()) return; | |
2050 | |
10278 | 2051 if (eliminate_boxing()) { |
2052 NOT_PRODUCT( TracePhase t2("incrementalInline", &_t_incrInline, TimeCompiler); ) | |
2053 // Inline valueOf() methods now. | |
2054 inline_boxing_calls(igvn); | |
2055 | |
10405 | 2056 print_method(PHASE_INCREMENTAL_BOXING_INLINE, 2); |
10278 | 2057 |
2058 if (failing()) return; | |
2059 } | |
2060 | |
12966 | 2061 // Remove the speculative part of types and clean up the graph from |
2062 // the extra CastPP nodes whose only purpose is to carry them. Do | |
2063 // that early so that optimizations are not disrupted by the extra | |
2064 // CastPP nodes. | |
2065 remove_speculative_types(igvn); | |
2066 | |
8048
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
2067 // No more new expensive nodes will be added to the list from here |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
2068 // so keep only the actual candidates for optimizations. |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
2069 cleanup_expensive_nodes(igvn); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
2070 |
1634
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2071 // Perform escape analysis |
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2072 if (_do_escape_analysis && ConnectionGraph::has_candidates(this)) { |
4064
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
kvn
parents:
3899
diff
changeset
|
2073 if (has_loops()) { |
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
kvn
parents:
3899
diff
changeset
|
2074 // Cleanup graph (remove dead nodes). |
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
kvn
parents:
3899
diff
changeset
|
2075 TracePhase t2("idealLoop", &_t_idealLoop, true); |
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
kvn
parents:
3899
diff
changeset
|
2076 PhaseIdealLoop ideal_loop( igvn, false, true ); |
10405 | 2077 if (major_progress()) print_method(PHASE_PHASEIDEAL_BEFORE_EA, 2); |
4064
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
kvn
parents:
3899
diff
changeset
|
2078 if (failing()) return; |
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
kvn
parents:
3899
diff
changeset
|
2079 } |
1634
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2080 ConnectionGraph::do_analysis(this, &igvn); |
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2081 |
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
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parents:
1609
diff
changeset
|
2082 if (failing()) return; |
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2083 |
4115 | 2084 // Optimize out fields loads from scalar replaceable allocations. |
1634
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2085 igvn.optimize(); |
10405 | 2086 print_method(PHASE_ITER_GVN_AFTER_EA, 2); |
1634
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2087 |
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2088 if (failing()) return; |
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2089 |
4115 | 2090 if (congraph() != NULL && macro_count() > 0) { |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
4767
diff
changeset
|
2091 NOT_PRODUCT( TracePhase t2("macroEliminate", &_t_macroEliminate, TimeCompiler); ) |
4115 | 2092 PhaseMacroExpand mexp(igvn); |
2093 mexp.eliminate_macro_nodes(); | |
2094 igvn.set_delay_transform(false); | |
2095 | |
2096 igvn.optimize(); | |
10405 | 2097 print_method(PHASE_ITER_GVN_AFTER_ELIMINATION, 2); |
4115 | 2098 |
2099 if (failing()) return; | |
2100 } | |
1634
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2101 } |
60a14ad85270
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parents:
1609
diff
changeset
|
2102 |
0 | 2103 // Loop transforms on the ideal graph. Range Check Elimination, |
2104 // peeling, unrolling, etc. | |
2105 | |
2106 // Set loop opts counter | |
2107 loop_opts_cnt = num_loop_opts(); | |
2108 if((loop_opts_cnt > 0) && (has_loops() || has_split_ifs())) { | |
2109 { | |
2110 TracePhase t2("idealLoop", &_t_idealLoop, true); | |
2445 | 2111 PhaseIdealLoop ideal_loop( igvn, true ); |
0 | 2112 loop_opts_cnt--; |
10405 | 2113 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP1, 2); |
0 | 2114 if (failing()) return; |
2115 } | |
2116 // Loop opts pass if partial peeling occurred in previous pass | |
2117 if(PartialPeelLoop && major_progress() && (loop_opts_cnt > 0)) { | |
2118 TracePhase t3("idealLoop", &_t_idealLoop, true); | |
2445 | 2119 PhaseIdealLoop ideal_loop( igvn, false ); |
0 | 2120 loop_opts_cnt--; |
10405 | 2121 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP2, 2); |
0 | 2122 if (failing()) return; |
2123 } | |
2124 // Loop opts pass for loop-unrolling before CCP | |
2125 if(major_progress() && (loop_opts_cnt > 0)) { | |
2126 TracePhase t4("idealLoop", &_t_idealLoop, true); | |
2445 | 2127 PhaseIdealLoop ideal_loop( igvn, false ); |
0 | 2128 loop_opts_cnt--; |
10405 | 2129 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP3, 2); |
0 | 2130 } |
921
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
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|
2131 if (!failing()) { |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2132 // Verify that last round of loop opts produced a valid graph |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2133 NOT_PRODUCT( TracePhase t2("idealLoopVerify", &_t_idealLoopVerify, TimeCompiler); ) |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
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parents:
859
diff
changeset
|
2134 PhaseIdealLoop::verify(igvn); |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2135 } |
0 | 2136 } |
2137 if (failing()) return; | |
2138 | |
2139 // Conditional Constant Propagation; | |
2140 PhaseCCP ccp( &igvn ); | |
2141 assert( true, "Break here to ccp.dump_nodes_and_types(_root,999,1)"); | |
2142 { | |
2143 TracePhase t2("ccp", &_t_ccp, true); | |
2144 ccp.do_transform(); | |
2145 } | |
10405 | 2146 print_method(PHASE_CPP1, 2); |
0 | 2147 |
2148 assert( true, "Break here to ccp.dump_old2new_map()"); | |
2149 | |
2150 // Iterative Global Value Numbering, including ideal transforms | |
2151 { | |
2152 NOT_PRODUCT( TracePhase t2("iterGVN2", &_t_iterGVN2, TimeCompiler); ) | |
2153 igvn = ccp; | |
2154 igvn.optimize(); | |
2155 } | |
2156 | |
10405 | 2157 print_method(PHASE_ITER_GVN2, 2); |
0 | 2158 |
2159 if (failing()) return; | |
2160 | |
2161 // Loop transforms on the ideal graph. Range Check Elimination, | |
2162 // peeling, unrolling, etc. | |
2163 if(loop_opts_cnt > 0) { | |
2164 debug_only( int cnt = 0; ); | |
2165 while(major_progress() && (loop_opts_cnt > 0)) { | |
2166 TracePhase t2("idealLoop", &_t_idealLoop, true); | |
2167 assert( cnt++ < 40, "infinite cycle in loop optimization" ); | |
2445 | 2168 PhaseIdealLoop ideal_loop( igvn, true); |
0 | 2169 loop_opts_cnt--; |
10405 | 2170 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP_ITERATIONS, 2); |
0 | 2171 if (failing()) return; |
2172 } | |
2173 } | |
921
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
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parents:
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diff
changeset
|
2174 |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2175 { |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2176 // Verify that all previous optimizations produced a valid graph |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2177 // at least to this point, even if no loop optimizations were done. |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
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diff
changeset
|
2178 NOT_PRODUCT( TracePhase t2("idealLoopVerify", &_t_idealLoopVerify, TimeCompiler); ) |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2179 PhaseIdealLoop::verify(igvn); |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2180 } |
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
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diff
changeset
|
2181 |
0 | 2182 { |
2183 NOT_PRODUCT( TracePhase t2("macroExpand", &_t_macroExpand, TimeCompiler); ) | |
2184 PhaseMacroExpand mex(igvn); | |
2185 if (mex.expand_macro_nodes()) { | |
2186 assert(failing(), "must bail out w/ explicit message"); | |
2187 return; | |
2188 } | |
2189 } | |
2190 | |
2191 } // (End scope of igvn; run destructor if necessary for asserts.) | |
2192 | |
7605 | 2193 dump_inlining(); |
0 | 2194 // A method with only infinite loops has no edges entering loops from root |
2195 { | |
2196 NOT_PRODUCT( TracePhase t2("graphReshape", &_t_graphReshaping, TimeCompiler); ) | |
2197 if (final_graph_reshaping()) { | |
2198 assert(failing(), "must bail out w/ explicit message"); | |
2199 return; | |
2200 } | |
2201 } | |
2202 | |
10405 | 2203 print_method(PHASE_OPTIMIZE_FINISHED, 2); |
0 | 2204 } |
2205 | |
2206 | |
2207 //------------------------------Code_Gen--------------------------------------- | |
2208 // Given a graph, generate code for it | |
2209 void Compile::Code_Gen() { | |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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diff
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|
2210 if (failing()) { |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
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parents:
12023
diff
changeset
|
2211 return; |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
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12023
diff
changeset
|
2212 } |
0 | 2213 |
2214 // Perform instruction selection. You might think we could reclaim Matcher | |
2215 // memory PDQ, but actually the Matcher is used in generating spill code. | |
2216 // Internals of the Matcher (including some VectorSets) must remain live | |
2217 // for awhile - thus I cannot reclaim Matcher memory lest a VectorSet usage | |
2218 // set a bit in reclaimed memory. | |
2219 | |
2220 // In debug mode can dump m._nodes.dump() for mapping of ideal to machine | |
2221 // nodes. Mapping is only valid at the root of each matched subtree. | |
2222 NOT_PRODUCT( verify_graph_edges(); ) | |
2223 | |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
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|
2224 Matcher matcher; |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2225 _matcher = &matcher; |
0 | 2226 { |
2227 TracePhase t2("matcher", &_t_matcher, true); | |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2228 matcher.match(); |
0 | 2229 } |
2230 // In debug mode can dump m._nodes.dump() for mapping of ideal to machine | |
2231 // nodes. Mapping is only valid at the root of each matched subtree. | |
2232 NOT_PRODUCT( verify_graph_edges(); ) | |
2233 | |
2234 // If you have too many nodes, or if matching has failed, bail out | |
2235 check_node_count(0, "out of nodes matching instructions"); | |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2236 if (failing()) { |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2237 return; |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2238 } |
0 | 2239 |
2240 // Build a proper-looking CFG | |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2241 PhaseCFG cfg(node_arena(), root(), matcher); |
0 | 2242 _cfg = &cfg; |
2243 { | |
2244 NOT_PRODUCT( TracePhase t2("scheduler", &_t_scheduler, TimeCompiler); ) | |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2245 bool success = cfg.do_global_code_motion(); |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2246 if (!success) { |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2247 return; |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
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|
2248 } |
0 | 2249 |
10405 | 2250 print_method(PHASE_GLOBAL_CODE_MOTION, 2); |
0 | 2251 NOT_PRODUCT( verify_graph_edges(); ) |
2252 debug_only( cfg.verify(); ) | |
2253 } | |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2254 |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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diff
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|
2255 PhaseChaitin regalloc(unique(), cfg, matcher); |
0 | 2256 _regalloc = ®alloc; |
2257 { | |
2258 TracePhase t2("regalloc", &_t_registerAllocation, true); | |
2259 // Perform register allocation. After Chaitin, use-def chains are | |
2260 // no longer accurate (at spill code) and so must be ignored. | |
2261 // Node->LRG->reg mappings are still accurate. | |
2262 _regalloc->Register_Allocate(); | |
2263 | |
2264 // Bail out if the allocator builds too many nodes | |
10111 | 2265 if (failing()) { |
2266 return; | |
2267 } | |
0 | 2268 } |
2269 | |
2270 // Prior to register allocation we kept empty basic blocks in case the | |
2271 // the allocator needed a place to spill. After register allocation we | |
2272 // are not adding any new instructions. If any basic block is empty, we | |
2273 // can now safely remove it. | |
2274 { | |
418 | 2275 NOT_PRODUCT( TracePhase t2("blockOrdering", &_t_blockOrdering, TimeCompiler); ) |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2276 cfg.remove_empty_blocks(); |
418 | 2277 if (do_freq_based_layout()) { |
2278 PhaseBlockLayout layout(cfg); | |
2279 } else { | |
2280 cfg.set_loop_alignment(); | |
2281 } | |
2282 cfg.fixup_flow(); | |
0 | 2283 } |
2284 | |
2285 // Apply peephole optimizations | |
2286 if( OptoPeephole ) { | |
2287 NOT_PRODUCT( TracePhase t2("peephole", &_t_peephole, TimeCompiler); ) | |
2288 PhasePeephole peep( _regalloc, cfg); | |
2289 peep.do_transform(); | |
2290 } | |
2291 | |
14428
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
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14422
diff
changeset
|
2292 // Do late expand if CPU requires this. |
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
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14422
diff
changeset
|
2293 if (Matcher::require_postalloc_expand) { |
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
parents:
14422
diff
changeset
|
2294 NOT_PRODUCT(TracePhase t2c("postalloc_expand", &_t_postalloc_expand, true)); |
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
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14422
diff
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|
2295 cfg.postalloc_expand(_regalloc); |
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
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14422
diff
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|
2296 } |
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
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14422
diff
changeset
|
2297 |
0 | 2298 // Convert Nodes to instruction bits in a buffer |
2299 { | |
2300 // %%%% workspace merge brought two timers together for one job | |
2301 TracePhase t2a("output", &_t_output, true); | |
2302 NOT_PRODUCT( TraceTime t2b(NULL, &_t_codeGeneration, TimeCompiler, false); ) | |
2303 Output(); | |
2304 } | |
2305 | |
10405 | 2306 print_method(PHASE_FINAL_CODE); |
0 | 2307 |
2308 // He's dead, Jim. | |
2309 _cfg = (PhaseCFG*)0xdeadbeef; | |
2310 _regalloc = (PhaseChaitin*)0xdeadbeef; | |
2311 } | |
2312 | |
2313 | |
2314 //------------------------------dump_asm--------------------------------------- | |
2315 // Dump formatted assembly | |
2316 #ifndef PRODUCT | |
2317 void Compile::dump_asm(int *pcs, uint pc_limit) { | |
2318 bool cut_short = false; | |
2319 tty->print_cr("#"); | |
2320 tty->print("# "); _tf->dump(); tty->cr(); | |
2321 tty->print_cr("#"); | |
2322 | |
2323 // For all blocks | |
2324 int pc = 0x0; // Program counter | |
2325 char starts_bundle = ' '; | |
2326 _regalloc->dump_frame(); | |
2327 | |
2328 Node *n = NULL; | |
12071
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8023003: Cleanup the public interface to PhaseCFG
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|
2329 for (uint i = 0; i < _cfg->number_of_blocks(); i++) { |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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diff
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|
2330 if (VMThread::should_terminate()) { |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
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|
2331 cut_short = true; |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
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12023
diff
changeset
|
2332 break; |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
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12023
diff
changeset
|
2333 } |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
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diff
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|
2334 Block* block = _cfg->get_block(i); |
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8023003: Cleanup the public interface to PhaseCFG
adlertz
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diff
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|
2335 if (block->is_connector() && !Verbose) { |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
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|
2336 continue; |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2337 } |
12167
650868c062a9
8023691: Create interface for nodes in class Block
adlertz
parents:
12071
diff
changeset
|
2338 n = block->head(); |
12071
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8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
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|
2339 if (pcs && n->_idx < pc_limit) { |
0 | 2340 tty->print("%3.3x ", pcs[n->_idx]); |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2341 } else { |
0 | 2342 tty->print(" "); |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
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|
2343 } |
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diff
changeset
|
2344 block->dump_head(_cfg); |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2345 if (block->is_connector()) { |
0 | 2346 tty->print_cr(" # Empty connector block"); |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2347 } else if (block->num_preds() == 2 && block->pred(1)->is_CatchProj() && block->pred(1)->as_CatchProj()->_con == CatchProjNode::fall_through_index) { |
0 | 2348 tty->print_cr(" # Block is sole successor of call"); |
2349 } | |
2350 | |
2351 // For all instructions | |
2352 Node *delay = NULL; | |
12167
650868c062a9
8023691: Create interface for nodes in class Block
adlertz
parents:
12071
diff
changeset
|
2353 for (uint j = 0; j < block->number_of_nodes(); j++) { |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2354 if (VMThread::should_terminate()) { |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2355 cut_short = true; |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2356 break; |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2357 } |
12167
650868c062a9
8023691: Create interface for nodes in class Block
adlertz
parents:
12071
diff
changeset
|
2358 n = block->get_node(j); |
0 | 2359 if (valid_bundle_info(n)) { |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2360 Bundle* bundle = node_bundling(n); |
0 | 2361 if (bundle->used_in_unconditional_delay()) { |
2362 delay = n; | |
2363 continue; | |
2364 } | |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2365 if (bundle->starts_bundle()) { |
0 | 2366 starts_bundle = '+'; |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2367 } |
0 | 2368 } |
2369 | |
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2370 if (WizardMode) { |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2371 n->dump(); |
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2372 } |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2373 |
0 | 2374 if( !n->is_Region() && // Dont print in the Assembly |
2375 !n->is_Phi() && // a few noisely useless nodes | |
2376 !n->is_Proj() && | |
2377 !n->is_MachTemp() && | |
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1080
diff
changeset
|
2378 !n->is_SafePointScalarObject() && |
0 | 2379 !n->is_Catch() && // Would be nice to print exception table targets |
2380 !n->is_MergeMem() && // Not very interesting | |
2381 !n->is_top() && // Debug info table constants | |
2382 !(n->is_Con() && !n->is_Mach())// Debug info table constants | |
2383 ) { | |
2384 if (pcs && n->_idx < pc_limit) | |
2385 tty->print("%3.3x", pcs[n->_idx]); | |
2386 else | |
2387 tty->print(" "); | |
2388 tty->print(" %c ", starts_bundle); | |
2389 starts_bundle = ' '; | |
2390 tty->print("\t"); | |
2391 n->format(_regalloc, tty); | |
2392 tty->cr(); | |
2393 } | |
2394 | |
2395 // If we have an instruction with a delay slot, and have seen a delay, | |
2396 // then back up and print it | |
2397 if (valid_bundle_info(n) && node_bundling(n)->use_unconditional_delay()) { | |
2398 assert(delay != NULL, "no unconditional delay instruction"); | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2399 if (WizardMode) delay->dump(); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2400 |
0 | 2401 if (node_bundling(delay)->starts_bundle()) |
2402 starts_bundle = '+'; | |
2403 if (pcs && n->_idx < pc_limit) | |
2404 tty->print("%3.3x", pcs[n->_idx]); | |
2405 else | |
2406 tty->print(" "); | |
2407 tty->print(" %c ", starts_bundle); | |
2408 starts_bundle = ' '; | |
2409 tty->print("\t"); | |
2410 delay->format(_regalloc, tty); | |
2411 tty->print_cr(""); | |
2412 delay = NULL; | |
2413 } | |
2414 | |
2415 // Dump the exception table as well | |
2416 if( n->is_Catch() && (Verbose || WizardMode) ) { | |
2417 // Print the exception table for this offset | |
2418 _handler_table.print_subtable_for(pc); | |
2419 } | |
2420 } | |
2421 | |
2422 if (pcs && n->_idx < pc_limit) | |
2423 tty->print_cr("%3.3x", pcs[n->_idx]); | |
2424 else | |
2425 tty->print_cr(""); | |
2426 | |
2427 assert(cut_short || delay == NULL, "no unconditional delay branch"); | |
2428 | |
2429 } // End of per-block dump | |
2430 tty->print_cr(""); | |
2431 | |
2432 if (cut_short) tty->print_cr("*** disassembly is cut short ***"); | |
2433 } | |
2434 #endif | |
2435 | |
2436 //------------------------------Final_Reshape_Counts--------------------------- | |
2437 // This class defines counters to help identify when a method | |
2438 // may/must be executed using hardware with only 24-bit precision. | |
2439 struct Final_Reshape_Counts : public StackObj { | |
2440 int _call_count; // count non-inlined 'common' calls | |
2441 int _float_count; // count float ops requiring 24-bit precision | |
2442 int _double_count; // count double ops requiring more precision | |
2443 int _java_call_count; // count non-inlined 'java' calls | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2444 int _inner_loop_count; // count loops which need alignment |
0 | 2445 VectorSet _visited; // Visitation flags |
2446 Node_List _tests; // Set of IfNodes & PCTableNodes | |
2447 | |
2448 Final_Reshape_Counts() : | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
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diff
changeset
|
2449 _call_count(0), _float_count(0), _double_count(0), |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2450 _java_call_count(0), _inner_loop_count(0), |
0 | 2451 _visited( Thread::current()->resource_area() ) { } |
2452 | |
2453 void inc_call_count () { _call_count ++; } | |
2454 void inc_float_count () { _float_count ++; } | |
2455 void inc_double_count() { _double_count++; } | |
2456 void inc_java_call_count() { _java_call_count++; } | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2457 void inc_inner_loop_count() { _inner_loop_count++; } |
0 | 2458 |
2459 int get_call_count () const { return _call_count ; } | |
2460 int get_float_count () const { return _float_count ; } | |
2461 int get_double_count() const { return _double_count; } | |
2462 int get_java_call_count() const { return _java_call_count; } | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2463 int get_inner_loop_count() const { return _inner_loop_count; } |
0 | 2464 }; |
2465 | |
9060
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
8730
diff
changeset
|
2466 #ifdef ASSERT |
0 | 2467 static bool oop_offset_is_sane(const TypeInstPtr* tp) { |
2468 ciInstanceKlass *k = tp->klass()->as_instance_klass(); | |
2469 // Make sure the offset goes inside the instance layout. | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2470 return k->contains_field_offset(tp->offset()); |
0 | 2471 // Note that OffsetBot and OffsetTop are very negative. |
2472 } | |
9060
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
8730
diff
changeset
|
2473 #endif |
0 | 2474 |
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2475 // Eliminate trivially redundant StoreCMs and accumulate their |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2476 // precedence edges. |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2477 void Compile::eliminate_redundant_card_marks(Node* n) { |
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2478 assert(n->Opcode() == Op_StoreCM, "expected StoreCM"); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2479 if (n->in(MemNode::Address)->outcnt() > 1) { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2480 // There are multiple users of the same address so it might be |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2481 // possible to eliminate some of the StoreCMs |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2482 Node* mem = n->in(MemNode::Memory); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2483 Node* adr = n->in(MemNode::Address); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2484 Node* val = n->in(MemNode::ValueIn); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2485 Node* prev = n; |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2486 bool done = false; |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2487 // Walk the chain of StoreCMs eliminating ones that match. As |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2488 // long as it's a chain of single users then the optimization is |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2489 // safe. Eliminating partially redundant StoreCMs would require |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2490 // cloning copies down the other paths. |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2491 while (mem->Opcode() == Op_StoreCM && mem->outcnt() == 1 && !done) { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2492 if (adr == mem->in(MemNode::Address) && |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2493 val == mem->in(MemNode::ValueIn)) { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2494 // redundant StoreCM |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2495 if (mem->req() > MemNode::OopStore) { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2496 // Hasn't been processed by this code yet. |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2497 n->add_prec(mem->in(MemNode::OopStore)); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2498 } else { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2499 // Already converted to precedence edge |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2500 for (uint i = mem->req(); i < mem->len(); i++) { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2501 // Accumulate any precedence edges |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2502 if (mem->in(i) != NULL) { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2503 n->add_prec(mem->in(i)); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2504 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2505 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2506 // Everything above this point has been processed. |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2507 done = true; |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2508 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2509 // Eliminate the previous StoreCM |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2510 prev->set_req(MemNode::Memory, mem->in(MemNode::Memory)); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2511 assert(mem->outcnt() == 0, "should be dead"); |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2512 mem->disconnect_inputs(NULL, this); |
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2513 } else { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2514 prev = mem; |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2515 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2516 mem = prev->in(MemNode::Memory); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2517 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2518 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2519 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2520 |
0 | 2521 //------------------------------final_graph_reshaping_impl---------------------- |
2522 // Implement items 1-5 from final_graph_reshaping below. | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2523 void Compile::final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc) { |
0 | 2524 |
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
164
diff
changeset
|
2525 if ( n->outcnt() == 0 ) return; // dead node |
0 | 2526 uint nop = n->Opcode(); |
2527 | |
2528 // Check for 2-input instruction with "last use" on right input. | |
2529 // Swap to left input. Implements item (2). | |
2530 if( n->req() == 3 && // two-input instruction | |
2531 n->in(1)->outcnt() > 1 && // left use is NOT a last use | |
2532 (!n->in(1)->is_Phi() || n->in(1)->in(2) != n) && // it is not data loop | |
2533 n->in(2)->outcnt() == 1 &&// right use IS a last use | |
2534 !n->in(2)->is_Con() ) { // right use is not a constant | |
2535 // Check for commutative opcode | |
2536 switch( nop ) { | |
2537 case Op_AddI: case Op_AddF: case Op_AddD: case Op_AddL: | |
2538 case Op_MaxI: case Op_MinI: | |
2539 case Op_MulI: case Op_MulF: case Op_MulD: case Op_MulL: | |
2540 case Op_AndL: case Op_XorL: case Op_OrL: | |
2541 case Op_AndI: case Op_XorI: case Op_OrI: { | |
2542 // Move "last use" input to left by swapping inputs | |
2543 n->swap_edges(1, 2); | |
2544 break; | |
2545 } | |
2546 default: | |
2547 break; | |
2548 } | |
2549 } | |
2550 | |
1609 | 2551 #ifdef ASSERT |
2552 if( n->is_Mem() ) { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2553 int alias_idx = get_alias_index(n->as_Mem()->adr_type()); |
1609 | 2554 assert( n->in(0) != NULL || alias_idx != Compile::AliasIdxRaw || |
2555 // oop will be recorded in oop map if load crosses safepoint | |
2556 n->is_Load() && (n->as_Load()->bottom_type()->isa_oopptr() || | |
2557 LoadNode::is_immutable_value(n->in(MemNode::Address))), | |
2558 "raw memory operations should have control edge"); | |
2559 } | |
2560 #endif | |
0 | 2561 // Count FPU ops and common calls, implements item (3) |
2562 switch( nop ) { | |
2563 // Count all float operations that may use FPU | |
2564 case Op_AddF: | |
2565 case Op_SubF: | |
2566 case Op_MulF: | |
2567 case Op_DivF: | |
2568 case Op_NegF: | |
2569 case Op_ModF: | |
2570 case Op_ConvI2F: | |
2571 case Op_ConF: | |
2572 case Op_CmpF: | |
2573 case Op_CmpF3: | |
2574 // case Op_ConvL2F: // longs are split into 32-bit halves | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2575 frc.inc_float_count(); |
0 | 2576 break; |
2577 | |
2578 case Op_ConvF2D: | |
2579 case Op_ConvD2F: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2580 frc.inc_float_count(); |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2581 frc.inc_double_count(); |
0 | 2582 break; |
2583 | |
2584 // Count all double operations that may use FPU | |
2585 case Op_AddD: | |
2586 case Op_SubD: | |
2587 case Op_MulD: | |
2588 case Op_DivD: | |
2589 case Op_NegD: | |
2590 case Op_ModD: | |
2591 case Op_ConvI2D: | |
2592 case Op_ConvD2I: | |
2593 // case Op_ConvL2D: // handled by leaf call | |
2594 // case Op_ConvD2L: // handled by leaf call | |
2595 case Op_ConD: | |
2596 case Op_CmpD: | |
2597 case Op_CmpD3: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2598 frc.inc_double_count(); |
0 | 2599 break; |
2600 case Op_Opaque1: // Remove Opaque Nodes before matching | |
2601 case Op_Opaque2: // Remove Opaque Nodes before matching | |
17780 | 2602 case Op_Opaque3: |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2603 n->subsume_by(n->in(1), this); |
0 | 2604 break; |
2605 case Op_CallStaticJava: | |
2606 case Op_CallJava: | |
2607 case Op_CallDynamicJava: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2608 frc.inc_java_call_count(); // Count java call site; |
0 | 2609 case Op_CallRuntime: |
2610 case Op_CallLeaf: | |
2611 case Op_CallLeafNoFP: { | |
2612 assert( n->is_Call(), "" ); | |
2613 CallNode *call = n->as_Call(); | |
2614 // Count call sites where the FP mode bit would have to be flipped. | |
2615 // Do not count uncommon runtime calls: | |
2616 // uncommon_trap, _complete_monitor_locking, _complete_monitor_unlocking, | |
2617 // _new_Java, _new_typeArray, _new_objArray, _rethrow_Java, ... | |
2618 if( !call->is_CallStaticJava() || !call->as_CallStaticJava()->_name ) { | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2619 frc.inc_call_count(); // Count the call site |
0 | 2620 } else { // See if uncommon argument is shared |
2621 Node *n = call->in(TypeFunc::Parms); | |
2622 int nop = n->Opcode(); | |
2623 // Clone shared simple arguments to uncommon calls, item (1). | |
2624 if( n->outcnt() > 1 && | |
2625 !n->is_Proj() && | |
2626 nop != Op_CreateEx && | |
2627 nop != Op_CheckCastPP && | |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2628 nop != Op_DecodeN && |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2629 nop != Op_DecodeNKlass && |
0 | 2630 !n->is_Mem() ) { |
2631 Node *x = n->clone(); | |
2632 call->set_req( TypeFunc::Parms, x ); | |
2633 } | |
2634 } | |
2635 break; | |
2636 } | |
2637 | |
2638 case Op_StoreD: | |
2639 case Op_LoadD: | |
2640 case Op_LoadD_unaligned: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2641 frc.inc_double_count(); |
0 | 2642 goto handle_mem; |
2643 case Op_StoreF: | |
2644 case Op_LoadF: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2645 frc.inc_float_count(); |
0 | 2646 goto handle_mem; |
2647 | |
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2648 case Op_StoreCM: |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2649 { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2650 // Convert OopStore dependence into precedence edge |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2651 Node* prec = n->in(MemNode::OopStore); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2652 n->del_req(MemNode::OopStore); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2653 n->add_prec(prec); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2654 eliminate_redundant_card_marks(n); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2655 } |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2656 |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2657 // fall through |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2658 |
0 | 2659 case Op_StoreB: |
2660 case Op_StoreC: | |
2661 case Op_StorePConditional: | |
2662 case Op_StoreI: | |
2663 case Op_StoreL: | |
420
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
418
diff
changeset
|
2664 case Op_StoreIConditional: |
0 | 2665 case Op_StoreLConditional: |
2666 case Op_CompareAndSwapI: | |
2667 case Op_CompareAndSwapL: | |
2668 case Op_CompareAndSwapP: | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2669 case Op_CompareAndSwapN: |
6795
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2670 case Op_GetAndAddI: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2671 case Op_GetAndAddL: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2672 case Op_GetAndSetI: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2673 case Op_GetAndSetL: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2674 case Op_GetAndSetP: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2675 case Op_GetAndSetN: |
0 | 2676 case Op_StoreP: |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2677 case Op_StoreN: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2678 case Op_StoreNKlass: |
0 | 2679 case Op_LoadB: |
624 | 2680 case Op_LoadUB: |
558
3b5ac9e7e6ea
6796746: rename LoadC (char) opcode class to LoadUS (unsigned short)
twisti
parents:
492
diff
changeset
|
2681 case Op_LoadUS: |
0 | 2682 case Op_LoadI: |
2683 case Op_LoadKlass: | |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2684 case Op_LoadNKlass: |
0 | 2685 case Op_LoadL: |
2686 case Op_LoadL_unaligned: | |
2687 case Op_LoadPLocked: | |
2688 case Op_LoadP: | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2689 case Op_LoadN: |
0 | 2690 case Op_LoadRange: |
2691 case Op_LoadS: { | |
2692 handle_mem: | |
2693 #ifdef ASSERT | |
2694 if( VerifyOptoOopOffsets ) { | |
2695 assert( n->is_Mem(), "" ); | |
2696 MemNode *mem = (MemNode*)n; | |
2697 // Check to see if address types have grounded out somehow. | |
2698 const TypeInstPtr *tp = mem->in(MemNode::Address)->bottom_type()->isa_instptr(); | |
2699 assert( !tp || oop_offset_is_sane(tp), "" ); | |
2700 } | |
2701 #endif | |
2702 break; | |
2703 } | |
2704 | |
2705 case Op_AddP: { // Assert sane base pointers | |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2706 Node *addp = n->in(AddPNode::Address); |
0 | 2707 assert( !addp->is_AddP() || |
2708 addp->in(AddPNode::Base)->is_top() || // Top OK for allocation | |
2709 addp->in(AddPNode::Base) == n->in(AddPNode::Base), | |
2710 "Base pointers must match" ); | |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2711 #ifdef _LP64 |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12167
diff
changeset
|
2712 if ((UseCompressedOops || UseCompressedClassPointers) && |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2713 addp->Opcode() == Op_ConP && |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2714 addp == n->in(AddPNode::Base) && |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2715 n->in(AddPNode::Offset)->is_Con()) { |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2716 // 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
|
2717 // 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
|
2718 // instructions (4) then load 64-bits constant (7). |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2719 // 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
|
2720 const Type* t = addp->bottom_type(); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2721 if (t->isa_oopptr() || t->isa_klassptr()) { |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2722 Node* nn = NULL; |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2723 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2724 int op = t->isa_oopptr() ? Op_ConN : Op_ConNKlass; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2725 |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2726 // 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
|
2727 Node* r = root(); |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2728 uint cnt = r->outcnt(); |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2729 for (uint i = 0; i < cnt; i++) { |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2730 Node* m = r->raw_out(i); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2731 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
|
2732 m->bottom_type()->make_ptr() == t) { |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2733 nn = m; |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2734 break; |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2735 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2736 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2737 if (nn != NULL) { |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2738 // Decode a narrow oop to match address |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2739 // [R12 + narrow_oop_reg<<3 + offset] |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2740 if (t->isa_oopptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2741 nn = new (this) DecodeNNode(nn, t); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2742 } else { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2743 nn = new (this) DecodeNKlassNode(nn, t); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2744 } |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2745 n->set_req(AddPNode::Base, nn); |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2746 n->set_req(AddPNode::Address, nn); |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2747 if (addp->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2748 addp->disconnect_inputs(NULL, this); |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2749 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2750 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2751 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2752 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2753 #endif |
0 | 2754 break; |
2755 } | |
2756 | |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2757 #ifdef _LP64 |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2758 case Op_CastPP: |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2759 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
|
2760 Node* in1 = n->in(1); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2761 const Type* t = n->bottom_type(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2762 Node* new_in1 = in1->clone(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2763 new_in1->as_DecodeN()->set_type(t); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2764 |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2765 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
|
2766 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2767 // 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
|
2768 // 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
|
2769 // 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
|
2770 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2771 // [R12 + narrow_oop_reg<<3 + offset] |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2772 // NullCheck narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2773 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2774 // 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
|
2775 // 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
|
2776 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2777 // 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
|
2778 // [base_reg + offset] |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2779 // NullCheck base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2780 // |
605 | 2781 // 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
|
2782 // 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
|
2783 // 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
|
2784 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2785 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
|
2786 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2787 |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2788 n->subsume_by(new_in1, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2789 if (in1->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2790 in1->disconnect_inputs(NULL, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2791 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2792 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2793 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2794 |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2795 case Op_CmpP: |
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
164
diff
changeset
|
2796 // 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
|
2797 // other TypePtr related Ideal optimizations (for example, ptr nullness). |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2798 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
|
2799 Node* in1 = n->in(1); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2800 Node* in2 = n->in(2); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2801 if (!in1->is_DecodeNarrowPtr()) { |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2802 in2 = in1; |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2803 in1 = n->in(2); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2804 } |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2805 assert(in1->is_DecodeNarrowPtr(), "sanity"); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2806 |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2807 Node* new_in2 = NULL; |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2808 if (in2->is_DecodeNarrowPtr()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2809 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
|
2810 new_in2 = in2->in(1); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2811 } else if (in2->Opcode() == Op_ConP) { |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2812 const Type* t = in2->bottom_type(); |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2813 if (t == TypePtr::NULL_PTR) { |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2814 assert(in1->is_DecodeN(), "compare klass to null?"); |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2815 // 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
|
2816 // oops implicit null check is not generated. |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2817 // 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
|
2818 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
|
2819 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
|
2820 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2821 // This transformation together with CastPP transformation above |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2822 // 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
|
2823 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2824 // The original code after Optimize() |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2825 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2826 // LoadN memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2827 // decode narrow_oop_reg, base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2828 // CmpP base_reg, NULL |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2829 // CastPP base_reg // NotNull |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2830 // Load [base_reg + offset], val_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2831 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2832 // after these transformations will be |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2833 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2834 // LoadN memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2835 // CmpN narrow_oop_reg, NULL |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2836 // 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
|
2837 // Load [base_reg + offset], val_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2838 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2839 // 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
|
2840 // 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
|
2841 // final_graph_reshaping_walk()). |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2842 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2843 // 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
|
2844 // on x86: |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2845 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2846 // Load_narrow_oop memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2847 // 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
|
2848 // NullCheck narrow_oop_reg |
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 // and on sparc: |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2851 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2852 // Load_narrow_oop memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2853 // 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
|
2854 // Load [base_reg + offset], val_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2855 // NullCheck base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2856 // |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2857 } else if (t->isa_oopptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2858 new_in2 = ConNode::make(this, t->make_narrowoop()); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2859 } else if (t->isa_klassptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2860 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
|
2861 } |
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2862 } |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2863 if (new_in2 != NULL) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2864 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
|
2865 n->subsume_by(cmpN, this); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2866 if (in1->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2867 in1->disconnect_inputs(NULL, this); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2868 } |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2869 if (in2->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2870 in2->disconnect_inputs(NULL, this); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2871 } |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2872 } |
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2873 } |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
253
diff
changeset
|
2874 break; |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2875 |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2876 case Op_DecodeN: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2877 case Op_DecodeNKlass: |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2878 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
|
2879 // 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
|
2880 // 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
|
2881 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
|
2882 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2883 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2884 case Op_EncodeP: |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2885 case Op_EncodePKlass: { |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2886 Node* in1 = n->in(1); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2887 if (in1->is_DecodeNarrowPtr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2888 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
|
2889 } else if (in1->Opcode() == Op_ConP) { |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2890 const Type* t = in1->bottom_type(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2891 if (t == TypePtr::NULL_PTR) { |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2892 assert(t->isa_oopptr(), "null klass?"); |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2893 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
|
2894 } else if (t->isa_oopptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2895 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
|
2896 } else if (t->isa_klassptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2897 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
|
2898 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2899 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2900 if (in1->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2901 in1->disconnect_inputs(NULL, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2902 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2903 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2904 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2905 |
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2906 case Op_Proj: { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2907 if (OptimizeStringConcat) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2908 ProjNode* p = n->as_Proj(); |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2909 if (p->_is_io_use) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2910 // Separate projections were used for the exception path which |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2911 // 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
|
2912 // then they will hang around and should just be replaced with |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2913 // the original one. |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2914 Node* proj = NULL; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2915 // Replace with just one |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2916 for (SimpleDUIterator i(p->in(0)); i.has_next(); i.next()) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2917 Node *use = i.get(); |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2918 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
|
2919 proj = use; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2920 break; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2921 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2922 } |
4767 | 2923 assert(proj != NULL, "must be found"); |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2924 p->subsume_by(proj, this); |
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2925 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2926 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2927 break; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2928 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2929 |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2930 case Op_Phi: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2931 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
|
2932 // 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
|
2933 // 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
|
2934 Node* unique_in = n->in(1); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2935 assert(unique_in != NULL, ""); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2936 uint cnt = n->req(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2937 for (uint i = 2; i < cnt; i++) { |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2938 Node* m = n->in(i); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2939 assert(m != NULL, ""); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2940 if (unique_in != m) |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2941 unique_in = NULL; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2942 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2943 if (unique_in != NULL) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2944 n->subsume_by(unique_in, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2945 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2946 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2947 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2948 |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2949 #endif |
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2950 |
0 | 2951 case Op_ModI: |
2952 if (UseDivMod) { | |
2953 // Check if a%b and a/b both exist | |
2954 Node* d = n->find_similar(Op_DivI); | |
2955 if (d) { | |
2956 // Replace them with a fused divmod if supported | |
2957 if (Matcher::has_match_rule(Op_DivModI)) { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2958 DivModINode* divmod = DivModINode::make(this, n); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2959 d->subsume_by(divmod->div_proj(), this); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2960 n->subsume_by(divmod->mod_proj(), this); |
0 | 2961 } else { |
2962 // 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
|
2963 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
|
2964 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
|
2965 n->subsume_by(sub, this); |
0 | 2966 } |
2967 } | |
2968 } | |
2969 break; | |
2970 | |
2971 case Op_ModL: | |
2972 if (UseDivMod) { | |
2973 // Check if a%b and a/b both exist | |
2974 Node* d = n->find_similar(Op_DivL); | |
2975 if (d) { | |
2976 // Replace them with a fused divmod if supported | |
2977 if (Matcher::has_match_rule(Op_DivModL)) { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2978 DivModLNode* divmod = DivModLNode::make(this, n); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2979 d->subsume_by(divmod->div_proj(), this); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2980 n->subsume_by(divmod->mod_proj(), this); |
0 | 2981 } else { |
2982 // 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
|
2983 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
|
2984 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
|
2985 n->subsume_by(sub, this); |
0 | 2986 } |
2987 } | |
2988 } | |
2989 break; | |
2990 | |
6179
8c92982cbbc4
7119644: Increase superword's vector size up to 256 bits
kvn
parents:
6143
diff
changeset
|
2991 case Op_LoadVector: |
8c92982cbbc4
7119644: Increase superword's vector size up to 256 bits
kvn
parents:
6143
diff
changeset
|
2992 case Op_StoreVector: |
0 | 2993 break; |
2994 | |
2995 case Op_PackB: | |
2996 case Op_PackS: | |
2997 case Op_PackI: | |
2998 case Op_PackF: | |
2999 case Op_PackL: | |
3000 case Op_PackD: | |
3001 if (n->req()-1 > 2) { | |
3002 // Replace many operand PackNodes with a binary tree for matching | |
3003 PackNode* p = (PackNode*) n; | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3004 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
|
3005 n->subsume_by(btp, this); |
0 | 3006 } |
3007 break; | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3008 case Op_Loop: |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3009 case Op_CountedLoop: |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3010 if (n->as_Loop()->is_inner_loop()) { |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3011 frc.inc_inner_loop_count(); |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3012 } |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3013 break; |
2401
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3014 case Op_LShiftI: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3015 case Op_RShiftI: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3016 case Op_URShiftI: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3017 case Op_LShiftL: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3018 case Op_RShiftL: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3019 case Op_URShiftL: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3020 if (Matcher::need_masked_shift_count) { |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3021 // 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
|
3022 // lower 5/6 bits. We need to do the masking ourselves. |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3023 Node* in2 = n->in(2); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3024 juint mask = (n->bottom_type() == TypeInt::INT) ? (BitsPerInt - 1) : (BitsPerLong - 1); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3025 const TypeInt* t = in2->find_int_type(); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3026 if (t != NULL && t->is_con()) { |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3027 juint shift = t->get_con(); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3028 if (shift > mask) { // Unsigned cmp |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3029 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
|
3030 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3031 } else { |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3032 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
|
3033 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
|
3034 n->set_req(2, shift); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3035 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3036 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3037 if (in2->outcnt() == 0) { // Remove dead node |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3038 in2->disconnect_inputs(NULL, this); |
2401
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3039 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3040 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3041 break; |
8694
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3042 case Op_MemBarStoreStore: |
10278 | 3043 case Op_MemBarRelease: |
8694
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3044 // 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
|
3045 // confuses register allocation. |
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3046 if (n->req() > MemBarNode::Precedent) { |
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3047 n->set_req(MemBarNode::Precedent, top()); |
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3048 } |
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3049 break; |
0 | 3050 default: |
3051 assert( !n->is_Call(), "" ); | |
3052 assert( !n->is_Mem(), "" ); | |
3053 break; | |
3054 } | |
127 | 3055 |
3056 // Collect CFG split points | |
3057 if (n->is_MultiBranch()) | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3058 frc._tests.push(n); |
0 | 3059 } |
3060 | |
3061 //------------------------------final_graph_reshaping_walk--------------------- | |
3062 // Replacing Opaque nodes with their input in final_graph_reshaping_impl(), | |
3063 // 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
|
3064 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
|
3065 ResourceArea *area = Thread::current()->resource_area(); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3066 Unique_Node_List sfpt(area); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3067 |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3068 frc._visited.set(root->_idx); // first, mark node as visited |
0 | 3069 uint cnt = root->req(); |
3070 Node *n = root; | |
3071 uint i = 0; | |
3072 while (true) { | |
3073 if (i < cnt) { | |
3074 // Place all non-visited non-null inputs onto stack | |
3075 Node* m = n->in(i); | |
3076 ++i; | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3077 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
|
3078 if (m->is_SafePoint() && m->as_SafePoint()->jvms() != NULL) |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3079 sfpt.push(m); |
0 | 3080 cnt = m->req(); |
3081 nstack.push(n, i); // put on stack parent and next input's index | |
3082 n = m; | |
3083 i = 0; | |
3084 } | |
3085 } else { | |
3086 // Now do post-visit work | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3087 final_graph_reshaping_impl( n, frc ); |
0 | 3088 if (nstack.is_empty()) |
3089 break; // finished | |
3090 n = nstack.node(); // Get node from stack | |
3091 cnt = n->req(); | |
3092 i = nstack.index(); | |
3093 nstack.pop(); // Shift to the next node on stack | |
3094 } | |
3095 } | |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3096 |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
3097 // Skip next transformation if compressed oops are not used. |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
3098 if ((UseCompressedOops && !Matcher::gen_narrow_oop_implicit_null_checks()) || |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12167
diff
changeset
|
3099 (!UseCompressedOops && !UseCompressedClassPointers)) |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
3100 return; |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
3101 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
3102 // Go over safepoints nodes to skip DecodeN/DecodeNKlass nodes for debug edges. |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3103 // It could be done for an uncommon traps or any safepoints/calls |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
3104 // if the DecodeN/DecodeNKlass node is referenced only in a debug info. |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3105 while (sfpt.size() > 0) { |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3106 n = sfpt.pop(); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3107 JVMState *jvms = n->as_SafePoint()->jvms(); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3108 assert(jvms != NULL, "sanity"); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3109 int start = jvms->debug_start(); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3110 int end = n->req(); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3111 bool is_uncommon = (n->is_CallStaticJava() && |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3112 n->as_CallStaticJava()->uncommon_trap_request() != 0); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3113 for (int j = start; j < end; j++) { |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3114 Node* in = n->in(j); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
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3115 if (in->is_DecodeNarrowPtr()) { |
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3116 bool safe_to_skip = true; |
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3117 if (!is_uncommon ) { |
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3118 // Is it safe to skip? |
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3119 for (uint i = 0; i < in->outcnt(); i++) { |
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3120 Node* u = in->raw_out(i); |
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3121 if (!u->is_SafePoint() || |
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3122 u->is_Call() && u->as_Call()->has_non_debug_use(n)) { |
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3123 safe_to_skip = false; |
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3124 } |
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3125 } |
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3126 } |
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3127 if (safe_to_skip) { |
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3128 n->set_req(j, in->in(1)); |
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3129 } |
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3130 if (in->outcnt() == 0) { |
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3131 in->disconnect_inputs(NULL, this); |
331
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3132 } |
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3133 } |
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3134 } |
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3135 } |
0 | 3136 } |
3137 | |
3138 //------------------------------final_graph_reshaping-------------------------- | |
3139 // Final Graph Reshaping. | |
3140 // | |
3141 // (1) Clone simple inputs to uncommon calls, so they can be scheduled late | |
3142 // and not commoned up and forced early. Must come after regular | |
3143 // optimizations to avoid GVN undoing the cloning. Clone constant | |
3144 // inputs to Loop Phis; these will be split by the allocator anyways. | |
3145 // Remove Opaque nodes. | |
3146 // (2) Move last-uses by commutative operations to the left input to encourage | |
3147 // Intel update-in-place two-address operations and better register usage | |
3148 // on RISCs. Must come after regular optimizations to avoid GVN Ideal | |
3149 // calls canonicalizing them back. | |
3150 // (3) Count the number of double-precision FP ops, single-precision FP ops | |
3151 // and call sites. On Intel, we can get correct rounding either by | |
3152 // forcing singles to memory (requires extra stores and loads after each | |
3153 // FP bytecode) or we can set a rounding mode bit (requires setting and | |
3154 // clearing the mode bit around call sites). The mode bit is only used | |
3155 // if the relative frequency of single FP ops to calls is low enough. | |
3156 // This is a key transform for SPEC mpeg_audio. | |
3157 // (4) Detect infinite loops; blobs of code reachable from above but not | |
3158 // below. Several of the Code_Gen algorithms fail on such code shapes, | |
3159 // so we simply bail out. Happens a lot in ZKM.jar, but also happens | |
3160 // from time to time in other codes (such as -Xcomp finalizer loops, etc). | |
3161 // Detection is by looking for IfNodes where only 1 projection is | |
3162 // reachable from below or CatchNodes missing some targets. | |
3163 // (5) Assert for insane oop offsets in debug mode. | |
3164 | |
3165 bool Compile::final_graph_reshaping() { | |
3166 // an infinite loop may have been eliminated by the optimizer, | |
3167 // in which case the graph will be empty. | |
3168 if (root()->req() == 1) { | |
3169 record_method_not_compilable("trivial infinite loop"); | |
3170 return true; | |
3171 } | |
3172 | |
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3173 // Expensive nodes have their control input set to prevent the GVN |
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3174 // from freely commoning them. There's no GVN beyond this point so |
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3175 // no need to keep the control input. We want the expensive nodes to |
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3176 // be freely moved to the least frequent code path by gcm. |
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3177 assert(OptimizeExpensiveOps || expensive_count() == 0, "optimization off but list non empty?"); |
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3178 for (int i = 0; i < expensive_count(); i++) { |
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3179 _expensive_nodes->at(i)->set_req(0, NULL); |
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3180 } |
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3181 |
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3182 Final_Reshape_Counts frc; |
0 | 3183 |
3184 // Visit everybody reachable! | |
3185 // Allocate stack of size C->unique()/2 to avoid frequent realloc | |
3186 Node_Stack nstack(unique() >> 1); | |
859
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3187 final_graph_reshaping_walk(nstack, root(), frc); |
0 | 3188 |
3189 // Check for unreachable (from below) code (i.e., infinite loops). | |
859
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3190 for( uint i = 0; i < frc._tests.size(); i++ ) { |
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3191 MultiBranchNode *n = frc._tests[i]->as_MultiBranch(); |
127 | 3192 // Get number of CFG targets. |
0 | 3193 // Note that PCTables include exception targets after calls. |
127 | 3194 uint required_outcnt = n->required_outcnt(); |
3195 if (n->outcnt() != required_outcnt) { | |
0 | 3196 // Check for a few special cases. Rethrow Nodes never take the |
3197 // 'fall-thru' path, so expected kids is 1 less. | |
3198 if (n->is_PCTable() && n->in(0) && n->in(0)->in(0)) { | |
3199 if (n->in(0)->in(0)->is_Call()) { | |
3200 CallNode *call = n->in(0)->in(0)->as_Call(); | |
3201 if (call->entry_point() == OptoRuntime::rethrow_stub()) { | |
127 | 3202 required_outcnt--; // Rethrow always has 1 less kid |
0 | 3203 } else if (call->req() > TypeFunc::Parms && |
3204 call->is_CallDynamicJava()) { | |
3205 // Check for null receiver. In such case, the optimizer has | |
3206 // detected that the virtual call will always result in a null | |
3207 // pointer exception. The fall-through projection of this CatchNode | |
3208 // will not be populated. | |
3209 Node *arg0 = call->in(TypeFunc::Parms); | |
3210 if (arg0->is_Type() && | |
3211 arg0->as_Type()->type()->higher_equal(TypePtr::NULL_PTR)) { | |
127 | 3212 required_outcnt--; |
0 | 3213 } |
3214 } else if (call->entry_point() == OptoRuntime::new_array_Java() && | |
3215 call->req() > TypeFunc::Parms+1 && | |
3216 call->is_CallStaticJava()) { | |
3217 // Check for negative array length. In such case, the optimizer has | |
3218 // detected that the allocation attempt will always result in an | |
3219 // exception. There is no fall-through projection of this CatchNode . | |
3220 Node *arg1 = call->in(TypeFunc::Parms+1); | |
3221 if (arg1->is_Type() && | |
3222 arg1->as_Type()->type()->join(TypeInt::POS)->empty()) { | |
127 | 3223 required_outcnt--; |
0 | 3224 } |
3225 } | |
3226 } | |
3227 } | |
127 | 3228 // Recheck with a better notion of 'required_outcnt' |
3229 if (n->outcnt() != required_outcnt) { | |
0 | 3230 record_method_not_compilable("malformed control flow"); |
3231 return true; // Not all targets reachable! | |
3232 } | |
3233 } | |
3234 // Check that I actually visited all kids. Unreached kids | |
3235 // must be infinite loops. | |
3236 for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) | |
859
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3237 if (!frc._visited.test(n->fast_out(j)->_idx)) { |
0 | 3238 record_method_not_compilable("infinite loop"); |
3239 return true; // Found unvisited kid; must be unreach | |
3240 } | |
3241 } | |
3242 | |
3243 // If original bytecodes contained a mixture of floats and doubles | |
3244 // check if the optimizer has made it homogenous, item (3). | |
929
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3245 if( Use24BitFPMode && Use24BitFP && UseSSE == 0 && |
859
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3246 frc.get_float_count() > 32 && |
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|
3247 frc.get_double_count() == 0 && |
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|
3248 (10 * frc.get_call_count() < frc.get_float_count()) ) { |
0 | 3249 set_24_bit_selection_and_mode( false, true ); |
3250 } | |
3251 | |
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3252 set_java_calls(frc.get_java_call_count()); |
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3253 set_inner_loops(frc.get_inner_loop_count()); |
0 | 3254 |
3255 // No infinite loops, no reason to bail out. | |
3256 return false; | |
3257 } | |
3258 | |
3259 //-----------------------------too_many_traps---------------------------------- | |
3260 // Report if there are too many traps at the current method and bci. | |
3261 // Return true if there was a trap, and/or PerMethodTrapLimit is exceeded. | |
3262 bool Compile::too_many_traps(ciMethod* method, | |
3263 int bci, | |
3264 Deoptimization::DeoptReason reason) { | |
3265 ciMethodData* md = method->method_data(); | |
3266 if (md->is_empty()) { | |
3267 // Assume the trap has not occurred, or that it occurred only | |
3268 // because of a transient condition during start-up in the interpreter. | |
3269 return false; | |
3270 } | |
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3271 ciMethod* m = Deoptimization::reason_is_speculate(reason) ? this->method() : NULL; |
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3272 if (md->has_trap_at(bci, m, reason) != 0) { |
0 | 3273 // Assume PerBytecodeTrapLimit==0, for a more conservative heuristic. |
3274 // Also, if there are multiple reasons, or if there is no per-BCI record, | |
3275 // assume the worst. | |
3276 if (log()) | |
3277 log()->elem("observe trap='%s' count='%d'", | |
3278 Deoptimization::trap_reason_name(reason), | |
3279 md->trap_count(reason)); | |
3280 return true; | |
3281 } else { | |
3282 // Ignore method/bci and see if there have been too many globally. | |
3283 return too_many_traps(reason, md); | |
3284 } | |
3285 } | |
3286 | |
3287 // Less-accurate variant which does not require a method and bci. | |
3288 bool Compile::too_many_traps(Deoptimization::DeoptReason reason, | |
3289 ciMethodData* logmd) { | |
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3290 if (trap_count(reason) >= Deoptimization::per_method_trap_limit(reason)) { |
0 | 3291 // Too many traps globally. |
3292 // Note that we use cumulative trap_count, not just md->trap_count. | |
3293 if (log()) { | |
3294 int mcount = (logmd == NULL)? -1: (int)logmd->trap_count(reason); | |
3295 log()->elem("observe trap='%s' count='0' mcount='%d' ccount='%d'", | |
3296 Deoptimization::trap_reason_name(reason), | |
3297 mcount, trap_count(reason)); | |
3298 } | |
3299 return true; | |
3300 } else { | |
3301 // The coast is clear. | |
3302 return false; | |
3303 } | |
3304 } | |
3305 | |
3306 //--------------------------too_many_recompiles-------------------------------- | |
3307 // Report if there are too many recompiles at the current method and bci. | |
3308 // Consults PerBytecodeRecompilationCutoff and PerMethodRecompilationCutoff. | |
3309 // Is not eager to return true, since this will cause the compiler to use | |
3310 // Action_none for a trap point, to avoid too many recompilations. | |
3311 bool Compile::too_many_recompiles(ciMethod* method, | |
3312 int bci, | |
3313 Deoptimization::DeoptReason reason) { | |
3314 ciMethodData* md = method->method_data(); | |
3315 if (md->is_empty()) { | |
3316 // Assume the trap has not occurred, or that it occurred only | |
3317 // because of a transient condition during start-up in the interpreter. | |
3318 return false; | |
3319 } | |
3320 // Pick a cutoff point well within PerBytecodeRecompilationCutoff. | |
3321 uint bc_cutoff = (uint) PerBytecodeRecompilationCutoff / 8; | |
3322 uint m_cutoff = (uint) PerMethodRecompilationCutoff / 2 + 1; // not zero | |
3323 Deoptimization::DeoptReason per_bc_reason | |
3324 = Deoptimization::reason_recorded_per_bytecode_if_any(reason); | |
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3325 ciMethod* m = Deoptimization::reason_is_speculate(reason) ? this->method() : NULL; |
0 | 3326 if ((per_bc_reason == Deoptimization::Reason_none |
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3327 || md->has_trap_at(bci, m, reason) != 0) |
0 | 3328 // The trap frequency measure we care about is the recompile count: |
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3329 && md->trap_recompiled_at(bci, m) |
0 | 3330 && md->overflow_recompile_count() >= bc_cutoff) { |
3331 // Do not emit a trap here if it has already caused recompilations. | |
3332 // Also, if there are multiple reasons, or if there is no per-BCI record, | |
3333 // assume the worst. | |
3334 if (log()) | |
3335 log()->elem("observe trap='%s recompiled' count='%d' recompiles2='%d'", | |
3336 Deoptimization::trap_reason_name(reason), | |
3337 md->trap_count(reason), | |
3338 md->overflow_recompile_count()); | |
3339 return true; | |
3340 } else if (trap_count(reason) != 0 | |
3341 && decompile_count() >= m_cutoff) { | |
3342 // Too many recompiles globally, and we have seen this sort of trap. | |
3343 // Use cumulative decompile_count, not just md->decompile_count. | |
3344 if (log()) | |
3345 log()->elem("observe trap='%s' count='%d' mcount='%d' decompiles='%d' mdecompiles='%d'", | |
3346 Deoptimization::trap_reason_name(reason), | |
3347 md->trap_count(reason), trap_count(reason), | |
3348 md->decompile_count(), decompile_count()); | |
3349 return true; | |
3350 } else { | |
3351 // The coast is clear. | |
3352 return false; | |
3353 } | |
3354 } | |
3355 | |
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3356 // Compute when not to trap. Used by matching trap based nodes and |
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3357 // NullCheck optimization. |
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3358 void Compile::set_allowed_deopt_reasons() { |
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3359 _allowed_reasons = 0; |
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3360 if (is_method_compilation()) { |
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3361 for (int rs = (int)Deoptimization::Reason_none+1; rs < Compile::trapHistLength; rs++) { |
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3362 assert(rs < BitsPerInt, "recode bit map"); |
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3363 if (!too_many_traps((Deoptimization::DeoptReason) rs)) { |
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3364 _allowed_reasons |= nth_bit(rs); |
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3365 } |
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|
3366 } |
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|
3367 } |
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3368 } |
0 | 3369 |
3370 #ifndef PRODUCT | |
3371 //------------------------------verify_graph_edges--------------------------- | |
3372 // Walk the Graph and verify that there is a one-to-one correspondence | |
3373 // between Use-Def edges and Def-Use edges in the graph. | |
3374 void Compile::verify_graph_edges(bool no_dead_code) { | |
3375 if (VerifyGraphEdges) { | |
3376 ResourceArea *area = Thread::current()->resource_area(); | |
3377 Unique_Node_List visited(area); | |
3378 // Call recursive graph walk to check edges | |
3379 _root->verify_edges(visited); | |
3380 if (no_dead_code) { | |
3381 // Now make sure that no visited node is used by an unvisited node. | |
3382 bool dead_nodes = 0; | |
3383 Unique_Node_List checked(area); | |
3384 while (visited.size() > 0) { | |
3385 Node* n = visited.pop(); | |
3386 checked.push(n); | |
3387 for (uint i = 0; i < n->outcnt(); i++) { | |
3388 Node* use = n->raw_out(i); | |
3389 if (checked.member(use)) continue; // already checked | |
3390 if (visited.member(use)) continue; // already in the graph | |
3391 if (use->is_Con()) continue; // a dead ConNode is OK | |
3392 // At this point, we have found a dead node which is DU-reachable. | |
3393 if (dead_nodes++ == 0) | |
3394 tty->print_cr("*** Dead nodes reachable via DU edges:"); | |
3395 use->dump(2); | |
3396 tty->print_cr("---"); | |
3397 checked.push(use); // No repeats; pretend it is now checked. | |
3398 } | |
3399 } | |
3400 assert(dead_nodes == 0, "using nodes must be reachable from root"); | |
3401 } | |
3402 } | |
3403 } | |
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3404 |
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|
3405 // Verify GC barriers consistency |
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3406 // Currently supported: |
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3407 // - G1 pre-barriers (see GraphKit::g1_write_barrier_pre()) |
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3408 void Compile::verify_barriers() { |
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3409 if (UseG1GC) { |
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3410 // Verify G1 pre-barriers |
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3411 const int marking_offset = in_bytes(JavaThread::satb_mark_queue_offset() + PtrQueue::byte_offset_of_active()); |
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3412 |
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3413 ResourceArea *area = Thread::current()->resource_area(); |
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3414 Unique_Node_List visited(area); |
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3415 Node_List worklist(area); |
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3416 // We're going to walk control flow backwards starting from the Root |
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3417 worklist.push(_root); |
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3418 while (worklist.size() > 0) { |
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3419 Node* x = worklist.pop(); |
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3420 if (x == NULL || x == top()) continue; |
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3421 if (visited.member(x)) { |
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|
3422 continue; |
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|
3423 } else { |
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|
3424 visited.push(x); |
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|
3425 } |
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|
3426 |
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|
3427 if (x->is_Region()) { |
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3428 for (uint i = 1; i < x->req(); i++) { |
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3429 worklist.push(x->in(i)); |
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|
3430 } |
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3431 } else { |
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3432 worklist.push(x->in(0)); |
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3433 // We are looking for the pattern: |
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3434 // /->ThreadLocal |
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3435 // If->Bool->CmpI->LoadB->AddP->ConL(marking_offset) |
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3436 // \->ConI(0) |
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3437 // We want to verify that the If and the LoadB have the same control |
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3438 // See GraphKit::g1_write_barrier_pre() |
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3439 if (x->is_If()) { |
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3440 IfNode *iff = x->as_If(); |
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3441 if (iff->in(1)->is_Bool() && iff->in(1)->in(1)->is_Cmp()) { |
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3442 CmpNode *cmp = iff->in(1)->in(1)->as_Cmp(); |
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3443 if (cmp->Opcode() == Op_CmpI && cmp->in(2)->is_Con() && cmp->in(2)->bottom_type()->is_int()->get_con() == 0 |
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3444 && cmp->in(1)->is_Load()) { |
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3445 LoadNode* load = cmp->in(1)->as_Load(); |
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3446 if (load->Opcode() == Op_LoadB && load->in(2)->is_AddP() && load->in(2)->in(2)->Opcode() == Op_ThreadLocal |
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3447 && load->in(2)->in(3)->is_Con() |
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3448 && load->in(2)->in(3)->bottom_type()->is_intptr_t()->get_con() == marking_offset) { |
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|
3449 |
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|
3450 Node* if_ctrl = iff->in(0); |
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3451 Node* load_ctrl = load->in(0); |
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|
3452 |
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|
3453 if (if_ctrl != load_ctrl) { |
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|
3454 // Skip possible CProj->NeverBranch in infinite loops |
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|
3455 if ((if_ctrl->is_Proj() && if_ctrl->Opcode() == Op_CProj) |
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|
3456 && (if_ctrl->in(0)->is_MultiBranch() && if_ctrl->in(0)->Opcode() == Op_NeverBranch)) { |
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|
3457 if_ctrl = if_ctrl->in(0)->in(0); |
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|
3458 } |
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|
3459 } |
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|
3460 assert(load_ctrl != NULL && if_ctrl == load_ctrl, "controls must match"); |
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|
3461 } |
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|
3462 } |
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|
3463 } |
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|
3464 } |
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|
3465 } |
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|
3466 } |
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|
3467 } |
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|
3468 } |
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|
3469 |
0 | 3470 #endif |
3471 | |
3472 // The Compile object keeps track of failure reasons separately from the ciEnv. | |
3473 // This is required because there is not quite a 1-1 relation between the | |
3474 // ciEnv and its compilation task and the Compile object. Note that one | |
3475 // ciEnv might use two Compile objects, if C2Compiler::compile_method decides | |
3476 // to backtrack and retry without subsuming loads. Other than this backtracking | |
3477 // behavior, the Compile's failure reason is quietly copied up to the ciEnv | |
3478 // by the logic in C2Compiler. | |
3479 void Compile::record_failure(const char* reason) { | |
3480 if (log() != NULL) { | |
3481 log()->elem("failure reason='%s' phase='compile'", reason); | |
3482 } | |
3483 if (_failure_reason == NULL) { | |
3484 // Record the first failure reason. | |
3485 _failure_reason = reason; | |
3486 } | |
10405 | 3487 |
3488 EventCompilerFailure event; | |
3489 if (event.should_commit()) { | |
3490 event.set_compileID(Compile::compile_id()); | |
3491 event.set_failure(reason); | |
3492 event.commit(); | |
3493 } | |
3494 | |
222 | 3495 if (!C->failure_reason_is(C2Compiler::retry_no_subsuming_loads())) { |
10405 | 3496 C->print_method(PHASE_FAILURE); |
222 | 3497 } |
0 | 3498 _root = NULL; // flush the graph, too |
3499 } | |
3500 | |
3501 Compile::TracePhase::TracePhase(const char* name, elapsedTimer* accumulator, bool dolog) | |
7196
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3502 : TraceTime(NULL, accumulator, false NOT_PRODUCT( || TimeCompiler ), false), |
2aff40cb4703
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|
3503 _phase_name(name), _dolog(dolog) |
0 | 3504 { |
3505 if (dolog) { | |
3506 C = Compile::current(); | |
3507 _log = C->log(); | |
3508 } else { | |
3509 C = NULL; | |
3510 _log = NULL; | |
3511 } | |
3512 if (_log != NULL) { | |
7196
2aff40cb4703
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|
3513 _log->begin_head("phase name='%s' nodes='%d' live='%d'", _phase_name, C->unique(), C->live_nodes()); |
0 | 3514 _log->stamp(); |
3515 _log->end_head(); | |
3516 } | |
3517 } | |
3518 | |
3519 Compile::TracePhase::~TracePhase() { | |
7196
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|
3520 |
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|
3521 C = Compile::current(); |
2aff40cb4703
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6888
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changeset
|
3522 if (_dolog) { |
2aff40cb4703
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6888
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changeset
|
3523 _log = C->log(); |
2aff40cb4703
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|
3524 } else { |
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bharadwaj
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diff
changeset
|
3525 _log = NULL; |
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changeset
|
3526 } |
2aff40cb4703
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|
3527 |
2aff40cb4703
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diff
changeset
|
3528 #ifdef ASSERT |
2aff40cb4703
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diff
changeset
|
3529 if (PrintIdealNodeCount) { |
2aff40cb4703
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diff
changeset
|
3530 tty->print_cr("phase name='%s' nodes='%d' live='%d' live_graph_walk='%d'", |
2aff40cb4703
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changeset
|
3531 _phase_name, C->unique(), C->live_nodes(), C->count_live_nodes_by_graph_walk()); |
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|
3532 } |
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|
3533 |
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|
3534 if (VerifyIdealNodeCount) { |
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|
3535 Compile::current()->print_missing_nodes(); |
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|
3536 } |
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|
3537 #endif |
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|
3538 |
0 | 3539 if (_log != NULL) { |
7196
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|
3540 _log->done("phase name='%s' nodes='%d' live='%d'", _phase_name, C->unique(), C->live_nodes()); |
0 | 3541 } |
3542 } | |
2008 | 3543 |
3544 //============================================================================= | |
3545 // Two Constant's are equal when the type and the value are equal. | |
3546 bool Compile::Constant::operator==(const Constant& other) { | |
3547 if (type() != other.type() ) return false; | |
3548 if (can_be_reused() != other.can_be_reused()) return false; | |
3549 // For floating point values we compare the bit pattern. | |
3550 switch (type()) { | |
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|
3551 case T_FLOAT: return (_v._value.i == other._v._value.i); |
2008 | 3552 case T_LONG: |
6725
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3553 case T_DOUBLE: return (_v._value.j == other._v._value.j); |
2008 | 3554 case T_OBJECT: |
6725
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3555 case T_ADDRESS: return (_v._value.l == other._v._value.l); |
da91efe96a93
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|
3556 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
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diff
changeset
|
3557 case T_METADATA: return (_v._metadata == other._v._metadata); |
2008 | 3558 default: ShouldNotReachHere(); |
3559 } | |
3560 return false; | |
3561 } | |
3562 | |
3563 static int type_to_size_in_bytes(BasicType t) { | |
3564 switch (t) { | |
3565 case T_LONG: return sizeof(jlong ); | |
3566 case T_FLOAT: return sizeof(jfloat ); | |
3567 case T_DOUBLE: return sizeof(jdouble); | |
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|
3568 case T_METADATA: return sizeof(Metadata*); |
2008 | 3569 // We use T_VOID as marker for jump-table entries (labels) which |
4114
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changeset
|
3570 // need an internal word relocation. |
2008 | 3571 case T_VOID: |
3572 case T_ADDRESS: | |
3573 case T_OBJECT: return sizeof(jobject); | |
3574 } | |
3575 | |
3576 ShouldNotReachHere(); | |
3577 return -1; | |
3578 } | |
3579 | |
4114
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|
3580 int Compile::ConstantTable::qsort_comparator(Constant* a, Constant* b) { |
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4064
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|
3581 // sort descending |
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changeset
|
3582 if (a->freq() > b->freq()) return -1; |
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diff
changeset
|
3583 if (a->freq() < b->freq()) return 1; |
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twisti
parents:
4064
diff
changeset
|
3584 return 0; |
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twisti
parents:
4064
diff
changeset
|
3585 } |
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diff
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|
3586 |
2008 | 3587 void Compile::ConstantTable::calculate_offsets_and_size() { |
4114
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7003454: order constants in constant table by number of references in code
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diff
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|
3588 // First, sort the array by frequencies. |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
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parents:
4064
diff
changeset
|
3589 _constants.sort(qsort_comparator); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
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parents:
4064
diff
changeset
|
3590 |
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7003454: order constants in constant table by number of references in code
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parents:
4064
diff
changeset
|
3591 #ifdef ASSERT |
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7003454: order constants in constant table by number of references in code
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diff
changeset
|
3592 // Make sure all jump-table entries were sorted to the end of the |
6729bbc1fcd6
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parents:
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diff
changeset
|
3593 // array (they have a negative frequency). |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
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4064
diff
changeset
|
3594 bool found_void = false; |
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7003454: order constants in constant table by number of references in code
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parents:
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diff
changeset
|
3595 for (int i = 0; i < _constants.length(); i++) { |
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7003454: order constants in constant table by number of references in code
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|
3596 Constant con = _constants.at(i); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
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changeset
|
3597 if (con.type() == T_VOID) |
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7003454: order constants in constant table by number of references in code
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diff
changeset
|
3598 found_void = true; // jump-tables |
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7003454: order constants in constant table by number of references in code
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diff
changeset
|
3599 else |
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7003454: order constants in constant table by number of references in code
twisti
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diff
changeset
|
3600 assert(!found_void, "wrong sorting"); |
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7003454: order constants in constant table by number of references in code
twisti
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diff
changeset
|
3601 } |
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7003454: order constants in constant table by number of references in code
twisti
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diff
changeset
|
3602 #endif |
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7003454: order constants in constant table by number of references in code
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diff
changeset
|
3603 |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
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diff
changeset
|
3604 int offset = 0; |
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7003454: order constants in constant table by number of references in code
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diff
changeset
|
3605 for (int i = 0; i < _constants.length(); i++) { |
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7003454: order constants in constant table by number of references in code
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|
3606 Constant* con = _constants.adr_at(i); |
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7003454: order constants in constant table by number of references in code
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diff
changeset
|
3607 |
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7003454: order constants in constant table by number of references in code
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diff
changeset
|
3608 // Align offset for type. |
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7003454: order constants in constant table by number of references in code
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diff
changeset
|
3609 int typesize = type_to_size_in_bytes(con->type()); |
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7003454: order constants in constant table by number of references in code
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changeset
|
3610 offset = align_size_up(offset, typesize); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3611 con->set_offset(offset); // set constant's offset |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
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diff
changeset
|
3612 |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
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diff
changeset
|
3613 if (con->type() == T_VOID) { |
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7003454: order constants in constant table by number of references in code
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diff
changeset
|
3614 MachConstantNode* n = (MachConstantNode*) con->get_jobject(); |
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7003454: order constants in constant table by number of references in code
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changeset
|
3615 offset = offset + typesize * n->outcnt(); // expand jump-table |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
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diff
changeset
|
3616 } else { |
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7003454: order constants in constant table by number of references in code
twisti
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diff
changeset
|
3617 offset = offset + typesize; |
2008 | 3618 } |
3619 } | |
3620 | |
3621 // Align size up to the next section start (which is insts; see | |
3622 // CodeBuffer::align_at_start). | |
3623 assert(_size == -1, "already set?"); | |
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
|
3624 _size = align_size_up(offset, CodeEntryAlignment); |
2008 | 3625 } |
3626 | |
3627 void Compile::ConstantTable::emit(CodeBuffer& cb) { | |
3628 MacroAssembler _masm(&cb); | |
4114
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7003454: order constants in constant table by number of references in code
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changeset
|
3629 for (int i = 0; i < _constants.length(); i++) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
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parents:
4064
diff
changeset
|
3630 Constant con = _constants.at(i); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3631 address constant_addr; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3632 switch (con.type()) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3633 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:
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diff
changeset
|
3634 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
|
3635 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
|
3636 case T_OBJECT: { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3637 jobject obj = con.get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
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diff
changeset
|
3638 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
|
3639 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
|
3640 break; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3641 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3642 case T_ADDRESS: { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3643 address addr = (address) con.get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3644 constant_addr = _masm.address_constant(addr); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3645 break; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3646 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3647 // 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
|
3648 // need an internal word relocation. |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3649 case T_VOID: { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3650 MachConstantNode* n = (MachConstantNode*) con.get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3651 // 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
|
3652 // 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
|
3653 address dummy = (address) n; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3654 constant_addr = _masm.address_constant(dummy); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3655 // Expand jump-table |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3656 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
|
3657 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
|
3658 assert(temp_addr, "consts section too small"); |
2008 | 3659 } |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3660 break; |
2008 | 3661 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3662 case T_METADATA: { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3663 Metadata* obj = con.get_metadata(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3664 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
|
3665 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
|
3666 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3667 } |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3668 default: ShouldNotReachHere(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3669 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3670 assert(constant_addr, "consts section too small"); |
6268
6c5b7a6becc8
7187454: stack overflow in C2 compiler thread on Solaris x86
kvn
parents:
6179
diff
changeset
|
3671 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 | 3672 } |
3673 } | |
3674 | |
3675 int Compile::ConstantTable::find_offset(Constant& con) const { | |
3676 int idx = _constants.find(con); | |
3677 assert(idx != -1, "constant must be in constant table"); | |
3678 int offset = _constants.at(idx).offset(); | |
3679 assert(offset != -1, "constant table not emitted yet?"); | |
3680 return offset; | |
3681 } | |
3682 | |
3683 void Compile::ConstantTable::add(Constant& con) { | |
3684 if (con.can_be_reused()) { | |
3685 int idx = _constants.find(con); | |
3686 if (idx != -1 && _constants.at(idx).can_be_reused()) { | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3687 _constants.adr_at(idx)->inc_freq(con.freq()); // increase the frequency by the current value |
2008 | 3688 return; |
3689 } | |
3690 } | |
3691 (void) _constants.append(con); | |
3692 } | |
3693 | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3694 Compile::Constant Compile::ConstantTable::add(MachConstantNode* n, BasicType type, jvalue value) { |
12023
d1034bd8cefc
8022284: Hide internal data structure in PhaseCFG
adlertz
parents:
10405
diff
changeset
|
3695 Block* b = Compile::current()->cfg()->get_block_for_node(n); |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3696 Constant con(type, value, b->_freq); |
2008 | 3697 add(con); |
3698 return con; | |
3699 } | |
3700 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3701 Compile::Constant Compile::ConstantTable::add(Metadata* metadata) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3702 Constant con(metadata); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3703 add(con); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3704 return con; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3705 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3706 |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3707 Compile::Constant Compile::ConstantTable::add(MachConstantNode* n, MachOper* oper) { |
2008 | 3708 jvalue value; |
3709 BasicType type = oper->type()->basic_type(); | |
3710 switch (type) { | |
3711 case T_LONG: value.j = oper->constantL(); break; | |
3712 case T_FLOAT: value.f = oper->constantF(); break; | |
3713 case T_DOUBLE: value.d = oper->constantD(); break; | |
3714 case T_OBJECT: | |
3715 case T_ADDRESS: value.l = (jobject) oper->constant(); break; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3716 case T_METADATA: return add((Metadata*)oper->constant()); break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3717 default: guarantee(false, err_msg_res("unhandled type: %s", type2name(type))); |
2008 | 3718 } |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3719 return add(n, type, value); |
2008 | 3720 } |
3721 | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3722 Compile::Constant Compile::ConstantTable::add_jump_table(MachConstantNode* n) { |
2008 | 3723 jvalue value; |
3724 // We can use the node pointer here to identify the right jump-table | |
3725 // as this method is called from Compile::Fill_buffer right before | |
3726 // the MachNodes are emitted and the jump-table is filled (means the | |
3727 // MachNode pointers do not change anymore). | |
3728 value.l = (jobject) n; | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3729 Constant con(T_VOID, value, next_jump_table_freq(), false); // Labels of a jump-table cannot be reused. |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3730 add(con); |
2008 | 3731 return con; |
3732 } | |
3733 | |
3734 void Compile::ConstantTable::fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray<Label*> labels) const { | |
3735 // If called from Compile::scratch_emit_size do nothing. | |
3736 if (Compile::current()->in_scratch_emit_size()) return; | |
3737 | |
3738 assert(labels.is_nonempty(), "must be"); | |
6268
6c5b7a6becc8
7187454: stack overflow in C2 compiler thread on Solaris x86
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6179
diff
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|
3739 assert((uint) labels.length() == n->outcnt(), err_msg_res("must be equal: %d == %d", labels.length(), n->outcnt())); |
2008 | 3740 |
3741 // Since MachConstantNode::constant_offset() also contains | |
3742 // table_base_offset() we need to subtract the table_base_offset() | |
3743 // to get the plain offset into the constant table. | |
3744 int offset = n->constant_offset() - table_base_offset(); | |
3745 | |
3746 MacroAssembler _masm(&cb); | |
3747 address* jump_table_base = (address*) (_masm.code()->consts()->start() + offset); | |
3748 | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3749 for (uint i = 0; i < n->outcnt(); i++) { |
2008 | 3750 address* constant_addr = &jump_table_base[i]; |
6268
6c5b7a6becc8
7187454: stack overflow in C2 compiler thread on Solaris x86
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6179
diff
changeset
|
3751 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 | 3752 *constant_addr = cb.consts()->target(*labels.at(i), (address) constant_addr); |
3753 cb.consts()->relocate((address) constant_addr, relocInfo::internal_word_type); | |
3754 } | |
3755 } | |
7421
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
parents:
7199
diff
changeset
|
3756 |
ad5dd04754ee
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roland
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7199
diff
changeset
|
3757 void Compile::dump_inlining() { |
12295 | 3758 if (print_inlining() || print_intrinsics()) { |
7473 | 3759 // Print inlining message for candidates that we couldn't inline |
3760 // for lack of space or non constant receiver | |
3761 for (int i = 0; i < _late_inlines.length(); i++) { | |
3762 CallGenerator* cg = _late_inlines.at(i); | |
3763 cg->print_inlining_late("live nodes > LiveNodeCountInliningCutoff"); | |
3764 } | |
3765 Unique_Node_List useful; | |
3766 useful.push(root()); | |
3767 for (uint next = 0; next < useful.size(); ++next) { | |
3768 Node* n = useful.at(next); | |
3769 if (n->is_Call() && n->as_Call()->generator() != NULL && n->as_Call()->generator()->call_node() == n) { | |
3770 CallNode* call = n->as_Call(); | |
3771 CallGenerator* cg = call->generator(); | |
3772 cg->print_inlining_late("receiver not constant"); | |
3773 } | |
3774 uint max = n->len(); | |
3775 for ( uint i = 0; i < max; ++i ) { | |
3776 Node *m = n->in(i); | |
3777 if ( m == NULL ) continue; | |
3778 useful.push(m); | |
3779 } | |
3780 } | |
7421
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
parents:
7199
diff
changeset
|
3781 for (int i = 0; i < _print_inlining_list->length(); i++) { |
12295 | 3782 tty->print(_print_inlining_list->adr_at(i)->ss()->as_string()); |
7421
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
parents:
7199
diff
changeset
|
3783 } |
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
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7199
diff
changeset
|
3784 } |
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
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7199
diff
changeset
|
3785 } |
8048
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3786 |
17622 | 3787 // Dump inlining replay data to the stream. |
3788 // Don't change thread state and acquire any locks. | |
3789 void Compile::dump_inline_data(outputStream* out) { | |
3790 InlineTree* inl_tree = ilt(); | |
3791 if (inl_tree != NULL) { | |
3792 out->print(" inline %d", inl_tree->count()); | |
3793 inl_tree->dump_replay_data(out); | |
3794 } | |
3795 } | |
3796 | |
8048
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3797 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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|
3798 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
|
3799 else if (n1->Opcode() > n2->Opcode()) return 1; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3800 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3801 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
parents:
7605
diff
changeset
|
3802 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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diff
changeset
|
3803 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
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diff
changeset
|
3804 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
|
3805 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3806 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3807 return 0; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3808 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3809 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3810 int Compile::cmp_expensive_nodes(Node** n1p, Node** n2p) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3811 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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|
3812 Node* n2 = *n2p; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3813 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3814 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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diff
changeset
|
3815 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3816 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3817 void Compile::sort_expensive_nodes() { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3818 if (!expensive_nodes_sorted()) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3819 _expensive_nodes->sort(cmp_expensive_nodes); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3820 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3821 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3822 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3823 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
|
3824 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:
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diff
changeset
|
3825 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
parents:
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diff
changeset
|
3826 return false; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3827 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3828 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3829 return true; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3830 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3831 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3832 bool Compile::should_optimize_expensive_nodes(PhaseIterGVN &igvn) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3833 if (_expensive_nodes->length() == 0) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3834 return false; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3835 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3836 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3837 assert(OptimizeExpensiveOps, "optimization off?"); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3838 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3839 // Take this opportunity to remove dead nodes from the list |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3840 int j = 0; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3841 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
parents:
7605
diff
changeset
|
3842 Node* n = _expensive_nodes->at(i); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3843 if (!n->is_unreachable(igvn)) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3844 assert(n->is_expensive(), "should be expensive"); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3845 _expensive_nodes->at_put(j, n); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3846 j++; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3847 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3848 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3849 _expensive_nodes->trunc_to(j); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3850 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3851 // 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
parents:
7605
diff
changeset
|
3852 // and check for at least two nodes of identical kind with same data |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3853 // inputs. |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3854 sort_expensive_nodes(); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3855 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3856 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
parents:
7605
diff
changeset
|
3857 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
parents:
7605
diff
changeset
|
3858 return true; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3859 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3860 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3861 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3862 return false; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3863 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3864 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3865 void Compile::cleanup_expensive_nodes(PhaseIterGVN &igvn) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3866 if (_expensive_nodes->length() == 0) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3867 return; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3868 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3869 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3870 assert(OptimizeExpensiveOps, "optimization off?"); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3871 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3872 // Sort to bring similar nodes next to each other and clear the |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3873 // control input of nodes for which there's only a single copy. |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3874 sort_expensive_nodes(); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3875 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3876 int j = 0; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3877 int identical = 0; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3878 int i = 0; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3879 for (; i < _expensive_nodes->length()-1; i++) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3880 assert(j <= i, "can't write beyond current index"); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3881 if (_expensive_nodes->at(i)->Opcode() == _expensive_nodes->at(i+1)->Opcode()) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3882 identical++; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3883 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
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diff
changeset
|
3884 continue; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3885 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3886 if (identical > 0) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3887 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3888 identical = 0; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3889 } else { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3890 Node* n = _expensive_nodes->at(i); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3891 igvn.hash_delete(n); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3892 n->set_req(0, NULL); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3893 igvn.hash_insert(n); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3894 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3895 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3896 if (identical > 0) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3897 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3898 } else if (_expensive_nodes->length() >= 1) { |
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3899 Node* n = _expensive_nodes->at(i); |
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3900 igvn.hash_delete(n); |
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3901 n->set_req(0, NULL); |
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3902 igvn.hash_insert(n); |
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3903 } |
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3904 _expensive_nodes->trunc_to(j); |
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3905 } |
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3906 |
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3907 void Compile::add_expensive_node(Node * n) { |
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3908 assert(!_expensive_nodes->contains(n), "duplicate entry in expensive list"); |
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3909 assert(n->is_expensive(), "expensive nodes with non-null control here only"); |
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3910 assert(!n->is_CFG() && !n->is_Mem(), "no cfg or memory nodes here"); |
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3911 if (OptimizeExpensiveOps) { |
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3912 _expensive_nodes->append(n); |
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3913 } else { |
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3914 // Clear control input and let IGVN optimize expensive nodes if |
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3915 // OptimizeExpensiveOps is off. |
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3916 n->set_req(0, NULL); |
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3917 } |
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3918 } |
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3919 |
12966 | 3920 /** |
3921 * Remove the speculative part of types and clean up the graph | |
3922 */ | |
3923 void Compile::remove_speculative_types(PhaseIterGVN &igvn) { | |
3924 if (UseTypeSpeculation) { | |
3925 Unique_Node_List worklist; | |
3926 worklist.push(root()); | |
3927 int modified = 0; | |
3928 // Go over all type nodes that carry a speculative type, drop the | |
3929 // speculative part of the type and enqueue the node for an igvn | |
3930 // which may optimize it out. | |
3931 for (uint next = 0; next < worklist.size(); ++next) { | |
3932 Node *n = worklist.at(next); | |
17671
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3933 if (n->is_Type()) { |
12966 | 3934 TypeNode* tn = n->as_Type(); |
17671
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3935 const Type* t = tn->type(); |
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3936 const Type* t_no_spec = t->remove_speculative(); |
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3937 if (t_no_spec != t) { |
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3938 bool in_hash = igvn.hash_delete(n); |
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3939 assert(in_hash, "node should be in igvn hash table"); |
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3940 tn->set_type(t_no_spec); |
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3941 igvn.hash_insert(n); |
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3942 igvn._worklist.push(n); // give it a chance to go away |
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3943 modified++; |
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3944 } |
12966 | 3945 } |
3946 uint max = n->len(); | |
3947 for( uint i = 0; i < max; ++i ) { | |
3948 Node *m = n->in(i); | |
3949 if (not_a_node(m)) continue; | |
3950 worklist.push(m); | |
3951 } | |
3952 } | |
3953 // Drop the speculative part of all types in the igvn's type table | |
3954 igvn.remove_speculative_types(); | |
3955 if (modified > 0) { | |
3956 igvn.optimize(); | |
3957 } | |
17671
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3958 #ifdef ASSERT |
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3959 // Verify that after the IGVN is over no speculative type has resurfaced |
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3960 worklist.clear(); |
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3961 worklist.push(root()); |
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3962 for (uint next = 0; next < worklist.size(); ++next) { |
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3963 Node *n = worklist.at(next); |
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3964 const Type* t = igvn.type(n); |
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3965 assert(t == t->remove_speculative(), "no more speculative types"); |
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3966 if (n->is_Type()) { |
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3967 t = n->as_Type()->type(); |
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3968 assert(t == t->remove_speculative(), "no more speculative types"); |
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3969 } |
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3970 uint max = n->len(); |
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3971 for( uint i = 0; i < max; ++i ) { |
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3972 Node *m = n->in(i); |
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3973 if (not_a_node(m)) continue; |
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3974 worklist.push(m); |
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3975 } |
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3976 } |
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3977 igvn.check_no_speculative_types(); |
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|
3978 #endif |
12966 | 3979 } |
3980 } | |
3981 | |
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3982 // Auxiliary method to support randomized stressing/fuzzing. |
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3983 // |
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3984 // This method can be called the arbitrary number of times, with current count |
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3985 // as the argument. The logic allows selecting a single candidate from the |
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3986 // running list of candidates as follows: |
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3987 // int count = 0; |
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3988 // Cand* selected = null; |
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3989 // while(cand = cand->next()) { |
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3990 // if (randomized_select(++count)) { |
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3991 // selected = cand; |
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|
3992 // } |
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|
3993 // } |
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3994 // |
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3995 // Including count equalizes the chances any candidate is "selected". |
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3996 // This is useful when we don't have the complete list of candidates to choose |
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3997 // from uniformly. In this case, we need to adjust the randomicity of the |
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3998 // selection, or else we will end up biasing the selection towards the latter |
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3999 // candidates. |
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|
4000 // |
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4001 // Quick back-envelope calculation shows that for the list of n candidates |
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4002 // the equal probability for the candidate to persist as "best" can be |
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4003 // achieved by replacing it with "next" k-th candidate with the probability |
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4004 // of 1/k. It can be easily shown that by the end of the run, the |
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4005 // probability for any candidate is converged to 1/n, thus giving the |
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|
4006 // uniform distribution among all the candidates. |
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|
4007 // |
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|
4008 // We don't care about the domain size as long as (RANDOMIZED_DOMAIN / count) is large. |
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|
4009 #define RANDOMIZED_DOMAIN_POW 29 |
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|
4010 #define RANDOMIZED_DOMAIN (1 << RANDOMIZED_DOMAIN_POW) |
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4011 #define RANDOMIZED_DOMAIN_MASK ((1 << (RANDOMIZED_DOMAIN_POW + 1)) - 1) |
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4012 bool Compile::randomized_select(int count) { |
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|
4013 assert(count > 0, "only positive"); |
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|
4014 return (os::random() & RANDOMIZED_DOMAIN_MASK) < (RANDOMIZED_DOMAIN / count); |
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4015 } |