Mercurial > hg > truffle
annotate src/share/vm/opto/compile.cpp @ 8071:bbc7936779f9
8006398: Add regression tests for deprectated GCs
Reviewed-by: ehelin, jwilhelm, jmasa
author | brutisso |
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date | Thu, 14 Feb 2013 09:11:43 +0100 |
parents | 8b3da8d14c93 |
children | 571076d3c79d |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
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27 #include "asm/macroAssembler.inline.hpp" |
1972 | 28 #include "classfile/systemDictionary.hpp" |
29 #include "code/exceptionHandlerTable.hpp" | |
30 #include "code/nmethod.hpp" | |
31 #include "compiler/compileLog.hpp" | |
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32 #include "compiler/disassembler.hpp" |
1972 | 33 #include "compiler/oopMap.hpp" |
34 #include "opto/addnode.hpp" | |
35 #include "opto/block.hpp" | |
36 #include "opto/c2compiler.hpp" | |
37 #include "opto/callGenerator.hpp" | |
38 #include "opto/callnode.hpp" | |
39 #include "opto/cfgnode.hpp" | |
40 #include "opto/chaitin.hpp" | |
41 #include "opto/compile.hpp" | |
42 #include "opto/connode.hpp" | |
43 #include "opto/divnode.hpp" | |
44 #include "opto/escape.hpp" | |
45 #include "opto/idealGraphPrinter.hpp" | |
46 #include "opto/loopnode.hpp" | |
47 #include "opto/machnode.hpp" | |
48 #include "opto/macro.hpp" | |
49 #include "opto/matcher.hpp" | |
50 #include "opto/memnode.hpp" | |
51 #include "opto/mulnode.hpp" | |
52 #include "opto/node.hpp" | |
53 #include "opto/opcodes.hpp" | |
54 #include "opto/output.hpp" | |
55 #include "opto/parse.hpp" | |
56 #include "opto/phaseX.hpp" | |
57 #include "opto/rootnode.hpp" | |
58 #include "opto/runtime.hpp" | |
59 #include "opto/stringopts.hpp" | |
60 #include "opto/type.hpp" | |
61 #include "opto/vectornode.hpp" | |
62 #include "runtime/arguments.hpp" | |
63 #include "runtime/signature.hpp" | |
64 #include "runtime/stubRoutines.hpp" | |
65 #include "runtime/timer.hpp" | |
66 #include "utilities/copy.hpp" | |
67 #ifdef TARGET_ARCH_MODEL_x86_32 | |
68 # include "adfiles/ad_x86_32.hpp" | |
69 #endif | |
70 #ifdef TARGET_ARCH_MODEL_x86_64 | |
71 # include "adfiles/ad_x86_64.hpp" | |
72 #endif | |
73 #ifdef TARGET_ARCH_MODEL_sparc | |
74 # include "adfiles/ad_sparc.hpp" | |
75 #endif | |
76 #ifdef TARGET_ARCH_MODEL_zero | |
77 # include "adfiles/ad_zero.hpp" | |
78 #endif | |
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79 #ifdef TARGET_ARCH_MODEL_arm |
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80 # include "adfiles/ad_arm.hpp" |
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81 #endif |
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82 #ifdef TARGET_ARCH_MODEL_ppc |
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83 # include "adfiles/ad_ppc.hpp" |
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84 #endif |
0 | 85 |
2008 | 86 |
87 // -------------------- Compile::mach_constant_base_node ----------------------- | |
88 // Constant table base node singleton. | |
89 MachConstantBaseNode* Compile::mach_constant_base_node() { | |
90 if (_mach_constant_base_node == NULL) { | |
91 _mach_constant_base_node = new (C) MachConstantBaseNode(); | |
92 _mach_constant_base_node->add_req(C->root()); | |
93 } | |
94 return _mach_constant_base_node; | |
95 } | |
96 | |
97 | |
0 | 98 /// Support for intrinsics. |
99 | |
100 // Return the index at which m must be inserted (or already exists). | |
101 // The sort order is by the address of the ciMethod, with is_virtual as minor key. | |
102 int Compile::intrinsic_insertion_index(ciMethod* m, bool is_virtual) { | |
103 #ifdef ASSERT | |
104 for (int i = 1; i < _intrinsics->length(); i++) { | |
105 CallGenerator* cg1 = _intrinsics->at(i-1); | |
106 CallGenerator* cg2 = _intrinsics->at(i); | |
107 assert(cg1->method() != cg2->method() | |
108 ? cg1->method() < cg2->method() | |
109 : cg1->is_virtual() < cg2->is_virtual(), | |
110 "compiler intrinsics list must stay sorted"); | |
111 } | |
112 #endif | |
113 // Binary search sorted list, in decreasing intervals [lo, hi]. | |
114 int lo = 0, hi = _intrinsics->length()-1; | |
115 while (lo <= hi) { | |
116 int mid = (uint)(hi + lo) / 2; | |
117 ciMethod* mid_m = _intrinsics->at(mid)->method(); | |
118 if (m < mid_m) { | |
119 hi = mid-1; | |
120 } else if (m > mid_m) { | |
121 lo = mid+1; | |
122 } else { | |
123 // look at minor sort key | |
124 bool mid_virt = _intrinsics->at(mid)->is_virtual(); | |
125 if (is_virtual < mid_virt) { | |
126 hi = mid-1; | |
127 } else if (is_virtual > mid_virt) { | |
128 lo = mid+1; | |
129 } else { | |
130 return mid; // exact match | |
131 } | |
132 } | |
133 } | |
134 return lo; // inexact match | |
135 } | |
136 | |
137 void Compile::register_intrinsic(CallGenerator* cg) { | |
138 if (_intrinsics == NULL) { | |
7473 | 139 _intrinsics = new (comp_arena())GrowableArray<CallGenerator*>(comp_arena(), 60, 0, NULL); |
0 | 140 } |
141 // This code is stolen from ciObjectFactory::insert. | |
142 // Really, GrowableArray should have methods for | |
143 // insert_at, remove_at, and binary_search. | |
144 int len = _intrinsics->length(); | |
145 int index = intrinsic_insertion_index(cg->method(), cg->is_virtual()); | |
146 if (index == len) { | |
147 _intrinsics->append(cg); | |
148 } else { | |
149 #ifdef ASSERT | |
150 CallGenerator* oldcg = _intrinsics->at(index); | |
151 assert(oldcg->method() != cg->method() || oldcg->is_virtual() != cg->is_virtual(), "don't register twice"); | |
152 #endif | |
153 _intrinsics->append(_intrinsics->at(len-1)); | |
154 int pos; | |
155 for (pos = len-2; pos >= index; pos--) { | |
156 _intrinsics->at_put(pos+1,_intrinsics->at(pos)); | |
157 } | |
158 _intrinsics->at_put(index, cg); | |
159 } | |
160 assert(find_intrinsic(cg->method(), cg->is_virtual()) == cg, "registration worked"); | |
161 } | |
162 | |
163 CallGenerator* Compile::find_intrinsic(ciMethod* m, bool is_virtual) { | |
164 assert(m->is_loaded(), "don't try this on unloaded methods"); | |
165 if (_intrinsics != NULL) { | |
166 int index = intrinsic_insertion_index(m, is_virtual); | |
167 if (index < _intrinsics->length() | |
168 && _intrinsics->at(index)->method() == m | |
169 && _intrinsics->at(index)->is_virtual() == is_virtual) { | |
170 return _intrinsics->at(index); | |
171 } | |
172 } | |
173 // Lazily create intrinsics for intrinsic IDs well-known in the runtime. | |
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174 if (m->intrinsic_id() != vmIntrinsics::_none && |
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175 m->intrinsic_id() <= vmIntrinsics::LAST_COMPILER_INLINE) { |
0 | 176 CallGenerator* cg = make_vm_intrinsic(m, is_virtual); |
177 if (cg != NULL) { | |
178 // Save it for next time: | |
179 register_intrinsic(cg); | |
180 return cg; | |
181 } else { | |
182 gather_intrinsic_statistics(m->intrinsic_id(), is_virtual, _intrinsic_disabled); | |
183 } | |
184 } | |
185 return NULL; | |
186 } | |
187 | |
188 // Compile:: register_library_intrinsics and make_vm_intrinsic are defined | |
189 // in library_call.cpp. | |
190 | |
191 | |
192 #ifndef PRODUCT | |
193 // statistics gathering... | |
194 | |
195 juint Compile::_intrinsic_hist_count[vmIntrinsics::ID_LIMIT] = {0}; | |
196 jubyte Compile::_intrinsic_hist_flags[vmIntrinsics::ID_LIMIT] = {0}; | |
197 | |
198 bool Compile::gather_intrinsic_statistics(vmIntrinsics::ID id, bool is_virtual, int flags) { | |
199 assert(id > vmIntrinsics::_none && id < vmIntrinsics::ID_LIMIT, "oob"); | |
200 int oflags = _intrinsic_hist_flags[id]; | |
201 assert(flags != 0, "what happened?"); | |
202 if (is_virtual) { | |
203 flags |= _intrinsic_virtual; | |
204 } | |
205 bool changed = (flags != oflags); | |
206 if ((flags & _intrinsic_worked) != 0) { | |
207 juint count = (_intrinsic_hist_count[id] += 1); | |
208 if (count == 1) { | |
209 changed = true; // first time | |
210 } | |
211 // increment the overall count also: | |
212 _intrinsic_hist_count[vmIntrinsics::_none] += 1; | |
213 } | |
214 if (changed) { | |
215 if (((oflags ^ flags) & _intrinsic_virtual) != 0) { | |
216 // Something changed about the intrinsic's virtuality. | |
217 if ((flags & _intrinsic_virtual) != 0) { | |
218 // This is the first use of this intrinsic as a virtual call. | |
219 if (oflags != 0) { | |
220 // We already saw it as a non-virtual, so note both cases. | |
221 flags |= _intrinsic_both; | |
222 } | |
223 } else if ((oflags & _intrinsic_both) == 0) { | |
224 // This is the first use of this intrinsic as a non-virtual | |
225 flags |= _intrinsic_both; | |
226 } | |
227 } | |
228 _intrinsic_hist_flags[id] = (jubyte) (oflags | flags); | |
229 } | |
230 // update the overall flags also: | |
231 _intrinsic_hist_flags[vmIntrinsics::_none] |= (jubyte) flags; | |
232 return changed; | |
233 } | |
234 | |
235 static char* format_flags(int flags, char* buf) { | |
236 buf[0] = 0; | |
237 if ((flags & Compile::_intrinsic_worked) != 0) strcat(buf, ",worked"); | |
238 if ((flags & Compile::_intrinsic_failed) != 0) strcat(buf, ",failed"); | |
239 if ((flags & Compile::_intrinsic_disabled) != 0) strcat(buf, ",disabled"); | |
240 if ((flags & Compile::_intrinsic_virtual) != 0) strcat(buf, ",virtual"); | |
241 if ((flags & Compile::_intrinsic_both) != 0) strcat(buf, ",nonvirtual"); | |
242 if (buf[0] == 0) strcat(buf, ","); | |
243 assert(buf[0] == ',', "must be"); | |
244 return &buf[1]; | |
245 } | |
246 | |
247 void Compile::print_intrinsic_statistics() { | |
248 char flagsbuf[100]; | |
249 ttyLocker ttyl; | |
250 if (xtty != NULL) xtty->head("statistics type='intrinsic'"); | |
251 tty->print_cr("Compiler intrinsic usage:"); | |
252 juint total = _intrinsic_hist_count[vmIntrinsics::_none]; | |
253 if (total == 0) total = 1; // avoid div0 in case of no successes | |
254 #define PRINT_STAT_LINE(name, c, f) \ | |
255 tty->print_cr(" %4d (%4.1f%%) %s (%s)", (int)(c), ((c) * 100.0) / total, name, f); | |
256 for (int index = 1 + (int)vmIntrinsics::_none; index < (int)vmIntrinsics::ID_LIMIT; index++) { | |
257 vmIntrinsics::ID id = (vmIntrinsics::ID) index; | |
258 int flags = _intrinsic_hist_flags[id]; | |
259 juint count = _intrinsic_hist_count[id]; | |
260 if ((flags | count) != 0) { | |
261 PRINT_STAT_LINE(vmIntrinsics::name_at(id), count, format_flags(flags, flagsbuf)); | |
262 } | |
263 } | |
264 PRINT_STAT_LINE("total", total, format_flags(_intrinsic_hist_flags[vmIntrinsics::_none], flagsbuf)); | |
265 if (xtty != NULL) xtty->tail("statistics"); | |
266 } | |
267 | |
268 void Compile::print_statistics() { | |
269 { ttyLocker ttyl; | |
270 if (xtty != NULL) xtty->head("statistics type='opto'"); | |
271 Parse::print_statistics(); | |
272 PhaseCCP::print_statistics(); | |
273 PhaseRegAlloc::print_statistics(); | |
274 Scheduling::print_statistics(); | |
275 PhasePeephole::print_statistics(); | |
276 PhaseIdealLoop::print_statistics(); | |
277 if (xtty != NULL) xtty->tail("statistics"); | |
278 } | |
279 if (_intrinsic_hist_flags[vmIntrinsics::_none] != 0) { | |
280 // put this under its own <statistics> element. | |
281 print_intrinsic_statistics(); | |
282 } | |
283 } | |
284 #endif //PRODUCT | |
285 | |
286 // Support for bundling info | |
287 Bundle* Compile::node_bundling(const Node *n) { | |
288 assert(valid_bundle_info(n), "oob"); | |
289 return &_node_bundling_base[n->_idx]; | |
290 } | |
291 | |
292 bool Compile::valid_bundle_info(const Node *n) { | |
293 return (_node_bundling_limit > n->_idx); | |
294 } | |
295 | |
296 | |
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297 void Compile::gvn_replace_by(Node* n, Node* nn) { |
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298 for (DUIterator_Last imin, i = n->last_outs(imin); i >= imin; ) { |
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299 Node* use = n->last_out(i); |
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300 bool is_in_table = initial_gvn()->hash_delete(use); |
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301 uint uses_found = 0; |
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302 for (uint j = 0; j < use->len(); j++) { |
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303 if (use->in(j) == n) { |
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304 if (j < use->req()) |
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305 use->set_req(j, nn); |
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306 else |
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307 use->set_prec(j, nn); |
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308 uses_found++; |
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309 } |
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310 } |
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311 if (is_in_table) { |
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312 // reinsert into table |
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313 initial_gvn()->hash_find_insert(use); |
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314 } |
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315 record_for_igvn(use); |
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316 i -= uses_found; // we deleted 1 or more copies of this edge |
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317 } |
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318 } |
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319 |
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320 |
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321 static inline bool not_a_node(const Node* n) { |
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322 if (n == NULL) return true; |
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323 if (((intptr_t)n & 1) != 0) return true; // uninitialized, etc. |
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324 if (*(address*)n == badAddress) return true; // kill by Node::destruct |
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325 return false; |
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326 } |
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327 |
0 | 328 // Identify all nodes that are reachable from below, useful. |
329 // Use breadth-first pass that records state in a Unique_Node_List, | |
330 // recursive traversal is slower. | |
331 void Compile::identify_useful_nodes(Unique_Node_List &useful) { | |
332 int estimated_worklist_size = unique(); | |
333 useful.map( estimated_worklist_size, NULL ); // preallocate space | |
334 | |
335 // Initialize worklist | |
336 if (root() != NULL) { useful.push(root()); } | |
337 // If 'top' is cached, declare it useful to preserve cached node | |
338 if( cached_top_node() ) { useful.push(cached_top_node()); } | |
339 | |
340 // Push all useful nodes onto the list, breadthfirst | |
341 for( uint next = 0; next < useful.size(); ++next ) { | |
342 assert( next < unique(), "Unique useful nodes < total nodes"); | |
343 Node *n = useful.at(next); | |
344 uint max = n->len(); | |
345 for( uint i = 0; i < max; ++i ) { | |
346 Node *m = n->in(i); | |
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347 if (not_a_node(m)) continue; |
0 | 348 useful.push(m); |
349 } | |
350 } | |
351 } | |
352 | |
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353 // Update dead_node_list with any missing dead nodes using useful |
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354 // list. Consider all non-useful nodes to be useless i.e., dead nodes. |
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355 void Compile::update_dead_node_list(Unique_Node_List &useful) { |
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356 uint max_idx = unique(); |
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357 VectorSet& useful_node_set = useful.member_set(); |
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358 |
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359 for (uint node_idx = 0; node_idx < max_idx; node_idx++) { |
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360 // If node with index node_idx is not in useful set, |
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361 // mark it as dead in dead node list. |
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362 if (! useful_node_set.test(node_idx) ) { |
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363 record_dead_node(node_idx); |
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364 } |
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365 } |
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366 } |
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367 |
7473 | 368 void Compile::remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful) { |
369 int shift = 0; | |
370 for (int i = 0; i < inlines->length(); i++) { | |
371 CallGenerator* cg = inlines->at(i); | |
372 CallNode* call = cg->call_node(); | |
373 if (shift > 0) { | |
374 inlines->at_put(i-shift, cg); | |
375 } | |
376 if (!useful.member(call)) { | |
377 shift++; | |
378 } | |
379 } | |
380 inlines->trunc_to(inlines->length()-shift); | |
381 } | |
382 | |
0 | 383 // Disconnect all useless nodes by disconnecting those at the boundary. |
384 void Compile::remove_useless_nodes(Unique_Node_List &useful) { | |
385 uint next = 0; | |
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386 while (next < useful.size()) { |
0 | 387 Node *n = useful.at(next++); |
388 // Use raw traversal of out edges since this code removes out edges | |
389 int max = n->outcnt(); | |
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390 for (int j = 0; j < max; ++j) { |
0 | 391 Node* child = n->raw_out(j); |
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392 if (! useful.member(child)) { |
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393 assert(!child->is_top() || child != top(), |
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394 "If top is cached in Compile object it is in useful list"); |
0 | 395 // Only need to remove this out-edge to the useless node |
396 n->raw_del_out(j); | |
397 --j; | |
398 --max; | |
399 } | |
400 } | |
401 if (n->outcnt() == 1 && n->has_special_unique_user()) { | |
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402 record_for_igvn(n->unique_out()); |
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403 } |
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404 } |
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405 // Remove useless macro and predicate opaq nodes |
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406 for (int i = C->macro_count()-1; i >= 0; i--) { |
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407 Node* n = C->macro_node(i); |
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408 if (!useful.member(n)) { |
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409 remove_macro_node(n); |
0 | 410 } |
411 } | |
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412 // Remove useless expensive node |
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413 for (int i = C->expensive_count()-1; i >= 0; i--) { |
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414 Node* n = C->expensive_node(i); |
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415 if (!useful.member(n)) { |
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416 remove_expensive_node(n); |
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417 } |
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418 } |
7473 | 419 // clean up the late inline lists |
420 remove_useless_late_inlines(&_string_late_inlines, useful); | |
421 remove_useless_late_inlines(&_late_inlines, useful); | |
0 | 422 debug_only(verify_graph_edges(true/*check for no_dead_code*/);) |
423 } | |
424 | |
425 //------------------------------frame_size_in_words----------------------------- | |
426 // frame_slots in units of words | |
427 int Compile::frame_size_in_words() const { | |
428 // shift is 0 in LP32 and 1 in LP64 | |
429 const int shift = (LogBytesPerWord - LogBytesPerInt); | |
430 int words = _frame_slots >> shift; | |
431 assert( words << shift == _frame_slots, "frame size must be properly aligned in LP64" ); | |
432 return words; | |
433 } | |
434 | |
435 // ============================================================================ | |
436 //------------------------------CompileWrapper--------------------------------- | |
437 class CompileWrapper : public StackObj { | |
438 Compile *const _compile; | |
439 public: | |
440 CompileWrapper(Compile* compile); | |
441 | |
442 ~CompileWrapper(); | |
443 }; | |
444 | |
445 CompileWrapper::CompileWrapper(Compile* compile) : _compile(compile) { | |
446 // the Compile* pointer is stored in the current ciEnv: | |
447 ciEnv* env = compile->env(); | |
448 assert(env == ciEnv::current(), "must already be a ciEnv active"); | |
449 assert(env->compiler_data() == NULL, "compile already active?"); | |
450 env->set_compiler_data(compile); | |
451 assert(compile == Compile::current(), "sanity"); | |
452 | |
453 compile->set_type_dict(NULL); | |
454 compile->set_type_hwm(NULL); | |
455 compile->set_type_last_size(0); | |
456 compile->set_last_tf(NULL, NULL); | |
457 compile->set_indexSet_arena(NULL); | |
458 compile->set_indexSet_free_block_list(NULL); | |
459 compile->init_type_arena(); | |
460 Type::Initialize(compile); | |
461 _compile->set_scratch_buffer_blob(NULL); | |
462 _compile->begin_method(); | |
463 } | |
464 CompileWrapper::~CompileWrapper() { | |
465 _compile->end_method(); | |
466 if (_compile->scratch_buffer_blob() != NULL) | |
467 BufferBlob::free(_compile->scratch_buffer_blob()); | |
468 _compile->env()->set_compiler_data(NULL); | |
469 } | |
470 | |
471 | |
472 //----------------------------print_compile_messages--------------------------- | |
473 void Compile::print_compile_messages() { | |
474 #ifndef PRODUCT | |
475 // Check if recompiling | |
476 if (_subsume_loads == false && PrintOpto) { | |
477 // Recompiling without allowing machine instructions to subsume loads | |
478 tty->print_cr("*********************************************************"); | |
479 tty->print_cr("** Bailout: Recompile without subsuming loads **"); | |
480 tty->print_cr("*********************************************************"); | |
481 } | |
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482 if (_do_escape_analysis != DoEscapeAnalysis && PrintOpto) { |
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483 // Recompiling without escape analysis |
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484 tty->print_cr("*********************************************************"); |
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485 tty->print_cr("** Bailout: Recompile without escape analysis **"); |
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486 tty->print_cr("*********************************************************"); |
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487 } |
0 | 488 if (env()->break_at_compile()) { |
605 | 489 // Open the debugger when compiling this method. |
0 | 490 tty->print("### Breaking when compiling: "); |
491 method()->print_short_name(); | |
492 tty->cr(); | |
493 BREAKPOINT; | |
494 } | |
495 | |
496 if( PrintOpto ) { | |
497 if (is_osr_compilation()) { | |
498 tty->print("[OSR]%3d", _compile_id); | |
499 } else { | |
500 tty->print("%3d", _compile_id); | |
501 } | |
502 } | |
503 #endif | |
504 } | |
505 | |
506 | |
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507 //-----------------------init_scratch_buffer_blob------------------------------ |
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508 // Construct a temporary BufferBlob and cache it for this compile. |
2008 | 509 void Compile::init_scratch_buffer_blob(int const_size) { |
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510 // If there is already a scratch buffer blob allocated and the |
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511 // constant section is big enough, use it. Otherwise free the |
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512 // current and allocate a new one. |
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513 BufferBlob* blob = scratch_buffer_blob(); |
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514 if ((blob != NULL) && (const_size <= _scratch_const_size)) { |
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515 // Use the current blob. |
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516 } else { |
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517 if (blob != NULL) { |
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518 BufferBlob::free(blob); |
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519 } |
0 | 520 |
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521 ResourceMark rm; |
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522 _scratch_const_size = const_size; |
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523 int size = (MAX_inst_size + MAX_stubs_size + _scratch_const_size); |
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524 blob = BufferBlob::create("Compile::scratch_buffer", size); |
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525 // Record the buffer blob for next time. |
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526 set_scratch_buffer_blob(blob); |
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527 // Have we run out of code space? |
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528 if (scratch_buffer_blob() == NULL) { |
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529 // Let CompilerBroker disable further compilations. |
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530 record_failure("Not enough space for scratch buffer in CodeCache"); |
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531 return; |
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532 } |
163 | 533 } |
0 | 534 |
535 // Initialize the relocation buffers | |
1748 | 536 relocInfo* locs_buf = (relocInfo*) blob->content_end() - MAX_locs_size; |
0 | 537 set_scratch_locs_memory(locs_buf); |
538 } | |
539 | |
540 | |
541 //-----------------------scratch_emit_size------------------------------------- | |
542 // Helper function that computes size by emitting code | |
543 uint Compile::scratch_emit_size(const Node* n) { | |
2008 | 544 // Start scratch_emit_size section. |
545 set_in_scratch_emit_size(true); | |
546 | |
0 | 547 // Emit into a trash buffer and count bytes emitted. |
548 // This is a pretty expensive way to compute a size, | |
549 // but it works well enough if seldom used. | |
550 // All common fixed-size instructions are given a size | |
551 // method by the AD file. | |
552 // Note that the scratch buffer blob and locs memory are | |
553 // allocated at the beginning of the compile task, and | |
554 // may be shared by several calls to scratch_emit_size. | |
555 // The allocation of the scratch buffer blob is particularly | |
556 // expensive, since it has to grab the code cache lock. | |
557 BufferBlob* blob = this->scratch_buffer_blob(); | |
558 assert(blob != NULL, "Initialize BufferBlob at start"); | |
559 assert(blob->size() > MAX_inst_size, "sanity"); | |
560 relocInfo* locs_buf = scratch_locs_memory(); | |
1748 | 561 address blob_begin = blob->content_begin(); |
0 | 562 address blob_end = (address)locs_buf; |
1748 | 563 assert(blob->content_contains(blob_end), "sanity"); |
0 | 564 CodeBuffer buf(blob_begin, blob_end - blob_begin); |
2008 | 565 buf.initialize_consts_size(_scratch_const_size); |
0 | 566 buf.initialize_stubs_size(MAX_stubs_size); |
567 assert(locs_buf != NULL, "sanity"); | |
2008 | 568 int lsize = MAX_locs_size / 3; |
569 buf.consts()->initialize_shared_locs(&locs_buf[lsize * 0], lsize); | |
570 buf.insts()->initialize_shared_locs( &locs_buf[lsize * 1], lsize); | |
571 buf.stubs()->initialize_shared_locs( &locs_buf[lsize * 2], lsize); | |
572 | |
573 // Do the emission. | |
3839 | 574 |
575 Label fakeL; // Fake label for branch instructions. | |
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576 Label* saveL = NULL; |
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577 uint save_bnum = 0; |
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578 bool is_branch = n->is_MachBranch(); |
3839 | 579 if (is_branch) { |
580 MacroAssembler masm(&buf); | |
581 masm.bind(fakeL); | |
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582 n->as_MachBranch()->save_label(&saveL, &save_bnum); |
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583 n->as_MachBranch()->label_set(&fakeL, 0); |
3839 | 584 } |
0 | 585 n->emit(buf, this->regalloc()); |
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586 if (is_branch) // Restore label. |
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587 n->as_MachBranch()->label_set(saveL, save_bnum); |
2008 | 588 |
589 // End scratch_emit_size section. | |
590 set_in_scratch_emit_size(false); | |
591 | |
1748 | 592 return buf.insts_size(); |
0 | 593 } |
594 | |
595 | |
596 // ============================================================================ | |
597 //------------------------------Compile standard------------------------------- | |
598 debug_only( int Compile::_debug_idx = 100000; ) | |
599 | |
600 // Compile a method. entry_bci is -1 for normal compilations and indicates | |
601 // the continuation bci for on stack replacement. | |
602 | |
603 | |
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604 Compile::Compile( ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, int osr_bci, bool subsume_loads, bool do_escape_analysis ) |
0 | 605 : Phase(Compiler), |
606 _env(ci_env), | |
607 _log(ci_env->log()), | |
608 _compile_id(ci_env->compile_id()), | |
609 _save_argument_registers(false), | |
610 _stub_name(NULL), | |
611 _stub_function(NULL), | |
612 _stub_entry_point(NULL), | |
613 _method(target), | |
614 _entry_bci(osr_bci), | |
615 _initial_gvn(NULL), | |
616 _for_igvn(NULL), | |
617 _warm_calls(NULL), | |
618 _subsume_loads(subsume_loads), | |
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619 _do_escape_analysis(do_escape_analysis), |
0 | 620 _failure_reason(NULL), |
621 _code_buffer("Compile::Fill_buffer"), | |
622 _orig_pc_slot(0), | |
623 _orig_pc_slot_offset_in_bytes(0), | |
1265 | 624 _has_method_handle_invokes(false), |
2008 | 625 _mach_constant_base_node(NULL), |
0 | 626 _node_bundling_limit(0), |
627 _node_bundling_base(NULL), | |
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628 _java_calls(0), |
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629 _inner_loops(0), |
2008 | 630 _scratch_const_size(-1), |
631 _in_scratch_emit_size(false), | |
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632 _dead_node_list(comp_arena()), |
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633 _dead_node_count(0), |
0 | 634 #ifndef PRODUCT |
635 _trace_opto_output(TraceOptoOutput || method()->has_option("TraceOptoOutput")), | |
636 _printer(IdealGraphPrinter::printer()), | |
637 #endif | |
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638 _congraph(NULL), |
7473 | 639 _late_inlines(comp_arena(), 2, 0, NULL), |
640 _string_late_inlines(comp_arena(), 2, 0, NULL), | |
641 _late_inlines_pos(0), | |
642 _number_of_mh_late_inlines(0), | |
643 _inlining_progress(false), | |
644 _inlining_incrementally(false), | |
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645 _print_inlining_list(NULL), |
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646 _print_inlining(0) { |
0 | 647 C = this; |
648 | |
649 CompileWrapper cw(this); | |
650 #ifndef PRODUCT | |
651 if (TimeCompiler2) { | |
652 tty->print(" "); | |
653 target->holder()->name()->print(); | |
654 tty->print("."); | |
655 target->print_short_name(); | |
656 tty->print(" "); | |
657 } | |
658 TraceTime t1("Total compilation time", &_t_totalCompilation, TimeCompiler, TimeCompiler2); | |
659 TraceTime t2(NULL, &_t_methodCompilation, TimeCompiler, false); | |
100
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660 bool print_opto_assembly = PrintOptoAssembly || _method->has_option("PrintOptoAssembly"); |
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661 if (!print_opto_assembly) { |
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662 bool print_assembly = (PrintAssembly || _method->should_print_assembly()); |
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663 if (print_assembly && !Disassembler::can_decode()) { |
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664 tty->print_cr("PrintAssembly request changed to PrintOptoAssembly"); |
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665 print_opto_assembly = true; |
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666 } |
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667 } |
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668 set_print_assembly(print_opto_assembly); |
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669 set_parsed_irreducible_loop(false); |
0 | 670 #endif |
671 | |
672 if (ProfileTraps) { | |
673 // Make sure the method being compiled gets its own MDO, | |
674 // so we can at least track the decompile_count(). | |
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675 method()->ensure_method_data(); |
0 | 676 } |
677 | |
678 Init(::AliasLevel); | |
679 | |
680 | |
681 print_compile_messages(); | |
682 | |
683 if (UseOldInlining || PrintCompilation NOT_PRODUCT( || PrintOpto) ) | |
684 _ilt = InlineTree::build_inline_tree_root(); | |
685 else | |
686 _ilt = NULL; | |
687 | |
688 // Even if NO memory addresses are used, MergeMem nodes must have at least 1 slice | |
689 assert(num_alias_types() >= AliasIdxRaw, ""); | |
690 | |
691 #define MINIMUM_NODE_HASH 1023 | |
692 // Node list that Iterative GVN will start with | |
693 Unique_Node_List for_igvn(comp_arena()); | |
694 set_for_igvn(&for_igvn); | |
695 | |
696 // GVN that will be run immediately on new nodes | |
697 uint estimated_size = method()->code_size()*4+64; | |
698 estimated_size = (estimated_size < MINIMUM_NODE_HASH ? MINIMUM_NODE_HASH : estimated_size); | |
699 PhaseGVN gvn(node_arena(), estimated_size); | |
700 set_initial_gvn(&gvn); | |
701 | |
7605 | 702 if (PrintInlining || PrintIntrinsics NOT_PRODUCT( || PrintOptoInlining)) { |
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703 _print_inlining_list = new (comp_arena())GrowableArray<PrintInliningBuffer>(comp_arena(), 1, 1, PrintInliningBuffer()); |
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704 } |
0 | 705 { // Scope for timing the parser |
706 TracePhase t3("parse", &_t_parser, true); | |
707 | |
708 // Put top into the hash table ASAP. | |
709 initial_gvn()->transform_no_reclaim(top()); | |
710 | |
711 // Set up tf(), start(), and find a CallGenerator. | |
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712 CallGenerator* cg = NULL; |
0 | 713 if (is_osr_compilation()) { |
714 const TypeTuple *domain = StartOSRNode::osr_domain(); | |
715 const TypeTuple *range = TypeTuple::make_range(method()->signature()); | |
716 init_tf(TypeFunc::make(domain, range)); | |
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717 StartNode* s = new (this) StartOSRNode(root(), domain); |
0 | 718 initial_gvn()->set_type_bottom(s); |
719 init_start(s); | |
720 cg = CallGenerator::for_osr(method(), entry_bci()); | |
721 } else { | |
722 // Normal case. | |
723 init_tf(TypeFunc::make(method())); | |
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724 StartNode* s = new (this) StartNode(root(), tf()->domain()); |
0 | 725 initial_gvn()->set_type_bottom(s); |
726 init_start(s); | |
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727 if (method()->intrinsic_id() == vmIntrinsics::_Reference_get && UseG1GC) { |
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728 // With java.lang.ref.reference.get() we must go through the |
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729 // intrinsic when G1 is enabled - even when get() is the root |
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730 // method of the compile - so that, if necessary, the value in |
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731 // the referent field of the reference object gets recorded by |
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732 // the pre-barrier code. |
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733 // Specifically, if G1 is enabled, the value in the referent |
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734 // field is recorded by the G1 SATB pre barrier. This will |
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735 // result in the referent being marked live and the reference |
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736 // object removed from the list of discovered references during |
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737 // reference processing. |
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738 cg = find_intrinsic(method(), false); |
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739 } |
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740 if (cg == NULL) { |
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741 float past_uses = method()->interpreter_invocation_count(); |
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742 float expected_uses = past_uses; |
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743 cg = CallGenerator::for_inline(method(), expected_uses); |
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744 } |
0 | 745 } |
746 if (failing()) return; | |
747 if (cg == NULL) { | |
748 record_method_not_compilable_all_tiers("cannot parse method"); | |
749 return; | |
750 } | |
751 JVMState* jvms = build_start_state(start(), tf()); | |
752 if ((jvms = cg->generate(jvms)) == NULL) { | |
753 record_method_not_compilable("method parse failed"); | |
754 return; | |
755 } | |
756 GraphKit kit(jvms); | |
757 | |
758 if (!kit.stopped()) { | |
759 // Accept return values, and transfer control we know not where. | |
760 // This is done by a special, unique ReturnNode bound to root. | |
761 return_values(kit.jvms()); | |
762 } | |
763 | |
764 if (kit.has_exceptions()) { | |
765 // Any exceptions that escape from this call must be rethrown | |
766 // to whatever caller is dynamically above us on the stack. | |
767 // This is done by a special, unique RethrowNode bound to root. | |
768 rethrow_exceptions(kit.transfer_exceptions_into_jvms()); | |
769 } | |
770 | |
7473 | 771 assert(IncrementalInline || (_late_inlines.length() == 0 && !has_mh_late_inlines()), "incremental inlining is off"); |
772 | |
773 if (_late_inlines.length() == 0 && !has_mh_late_inlines() && !failing() && has_stringbuilder()) { | |
774 inline_string_calls(true); | |
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775 } |
7473 | 776 |
777 if (failing()) return; | |
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778 |
417 | 779 print_method("Before RemoveUseless", 3); |
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780 |
0 | 781 // Remove clutter produced by parsing. |
782 if (!failing()) { | |
783 ResourceMark rm; | |
784 PhaseRemoveUseless pru(initial_gvn(), &for_igvn); | |
785 } | |
786 } | |
787 | |
788 // Note: Large methods are capped off in do_one_bytecode(). | |
789 if (failing()) return; | |
790 | |
791 // After parsing, node notes are no longer automagic. | |
792 // They must be propagated by register_new_node_with_optimizer(), | |
793 // clone(), or the like. | |
794 set_default_node_notes(NULL); | |
795 | |
796 for (;;) { | |
797 int successes = Inline_Warm(); | |
798 if (failing()) return; | |
799 if (successes == 0) break; | |
800 } | |
801 | |
802 // Drain the list. | |
803 Finish_Warm(); | |
804 #ifndef PRODUCT | |
805 if (_printer) { | |
806 _printer->print_inlining(this); | |
807 } | |
808 #endif | |
809 | |
810 if (failing()) return; | |
811 NOT_PRODUCT( verify_graph_edges(); ) | |
812 | |
813 // Now optimize | |
814 Optimize(); | |
815 if (failing()) return; | |
816 NOT_PRODUCT( verify_graph_edges(); ) | |
817 | |
818 #ifndef PRODUCT | |
819 if (PrintIdeal) { | |
820 ttyLocker ttyl; // keep the following output all in one block | |
821 // This output goes directly to the tty, not the compiler log. | |
822 // To enable tools to match it up with the compilation activity, | |
823 // be sure to tag this tty output with the compile ID. | |
824 if (xtty != NULL) { | |
825 xtty->head("ideal compile_id='%d'%s", compile_id(), | |
826 is_osr_compilation() ? " compile_kind='osr'" : | |
827 ""); | |
828 } | |
829 root()->dump(9999); | |
830 if (xtty != NULL) { | |
831 xtty->tail("ideal"); | |
832 } | |
833 } | |
834 #endif | |
835 | |
836 // Now that we know the size of all the monitors we can add a fixed slot | |
837 // for the original deopt pc. | |
838 | |
839 _orig_pc_slot = fixed_slots(); | |
840 int next_slot = _orig_pc_slot + (sizeof(address) / VMRegImpl::stack_slot_size); | |
841 set_fixed_slots(next_slot); | |
842 | |
843 // Now generate code | |
844 Code_Gen(); | |
845 if (failing()) return; | |
846 | |
847 // Check if we want to skip execution of all compiled code. | |
848 { | |
849 #ifndef PRODUCT | |
850 if (OptoNoExecute) { | |
851 record_method_not_compilable("+OptoNoExecute"); // Flag as failed | |
852 return; | |
853 } | |
854 TracePhase t2("install_code", &_t_registerMethod, TimeCompiler); | |
855 #endif | |
856 | |
857 if (is_osr_compilation()) { | |
858 _code_offsets.set_value(CodeOffsets::Verified_Entry, 0); | |
859 _code_offsets.set_value(CodeOffsets::OSR_Entry, _first_block_size); | |
860 } else { | |
861 _code_offsets.set_value(CodeOffsets::Verified_Entry, _first_block_size); | |
862 _code_offsets.set_value(CodeOffsets::OSR_Entry, 0); | |
863 } | |
864 | |
865 env()->register_method(_method, _entry_bci, | |
866 &_code_offsets, | |
867 _orig_pc_slot_offset_in_bytes, | |
868 code_buffer(), | |
869 frame_size_in_words(), _oop_map_set, | |
870 &_handler_table, &_inc_table, | |
871 compiler, | |
872 env()->comp_level(), | |
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873 has_unsafe_access(), |
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874 SharedRuntime::is_wide_vector(max_vector_size()) |
0 | 875 ); |
6843 | 876 |
877 if (log() != NULL) // Print code cache state into compiler log | |
878 log()->code_cache_state(); | |
0 | 879 } |
880 } | |
881 | |
882 //------------------------------Compile---------------------------------------- | |
883 // Compile a runtime stub | |
884 Compile::Compile( ciEnv* ci_env, | |
885 TypeFunc_generator generator, | |
886 address stub_function, | |
887 const char *stub_name, | |
888 int is_fancy_jump, | |
889 bool pass_tls, | |
890 bool save_arg_registers, | |
891 bool return_pc ) | |
892 : Phase(Compiler), | |
893 _env(ci_env), | |
894 _log(ci_env->log()), | |
895 _compile_id(-1), | |
896 _save_argument_registers(save_arg_registers), | |
897 _method(NULL), | |
898 _stub_name(stub_name), | |
899 _stub_function(stub_function), | |
900 _stub_entry_point(NULL), | |
901 _entry_bci(InvocationEntryBci), | |
902 _initial_gvn(NULL), | |
903 _for_igvn(NULL), | |
904 _warm_calls(NULL), | |
905 _orig_pc_slot(0), | |
906 _orig_pc_slot_offset_in_bytes(0), | |
907 _subsume_loads(true), | |
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908 _do_escape_analysis(false), |
0 | 909 _failure_reason(NULL), |
910 _code_buffer("Compile::Fill_buffer"), | |
1265 | 911 _has_method_handle_invokes(false), |
2008 | 912 _mach_constant_base_node(NULL), |
0 | 913 _node_bundling_limit(0), |
914 _node_bundling_base(NULL), | |
859
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915 _java_calls(0), |
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916 _inner_loops(0), |
0 | 917 #ifndef PRODUCT |
918 _trace_opto_output(TraceOptoOutput), | |
919 _printer(NULL), | |
920 #endif | |
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921 _dead_node_list(comp_arena()), |
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922 _dead_node_count(0), |
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923 _congraph(NULL), |
7473 | 924 _number_of_mh_late_inlines(0), |
925 _inlining_progress(false), | |
926 _inlining_incrementally(false), | |
7421
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927 _print_inlining_list(NULL), |
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928 _print_inlining(0) { |
0 | 929 C = this; |
930 | |
931 #ifndef PRODUCT | |
932 TraceTime t1(NULL, &_t_totalCompilation, TimeCompiler, false); | |
933 TraceTime t2(NULL, &_t_stubCompilation, TimeCompiler, false); | |
934 set_print_assembly(PrintFrameConverterAssembly); | |
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935 set_parsed_irreducible_loop(false); |
0 | 936 #endif |
937 CompileWrapper cw(this); | |
938 Init(/*AliasLevel=*/ 0); | |
939 init_tf((*generator)()); | |
940 | |
941 { | |
942 // The following is a dummy for the sake of GraphKit::gen_stub | |
943 Unique_Node_List for_igvn(comp_arena()); | |
944 set_for_igvn(&for_igvn); // not used, but some GraphKit guys push on this | |
945 PhaseGVN gvn(Thread::current()->resource_area(),255); | |
946 set_initial_gvn(&gvn); // not significant, but GraphKit guys use it pervasively | |
947 gvn.transform_no_reclaim(top()); | |
948 | |
949 GraphKit kit; | |
950 kit.gen_stub(stub_function, stub_name, is_fancy_jump, pass_tls, return_pc); | |
951 } | |
952 | |
953 NOT_PRODUCT( verify_graph_edges(); ) | |
954 Code_Gen(); | |
955 if (failing()) return; | |
956 | |
957 | |
958 // Entry point will be accessed using compile->stub_entry_point(); | |
959 if (code_buffer() == NULL) { | |
960 Matcher::soft_match_failure(); | |
961 } else { | |
962 if (PrintAssembly && (WizardMode || Verbose)) | |
963 tty->print_cr("### Stub::%s", stub_name); | |
964 | |
965 if (!failing()) { | |
966 assert(_fixed_slots == 0, "no fixed slots used for runtime stubs"); | |
967 | |
968 // Make the NMethod | |
969 // For now we mark the frame as never safe for profile stackwalking | |
970 RuntimeStub *rs = RuntimeStub::new_runtime_stub(stub_name, | |
971 code_buffer(), | |
972 CodeOffsets::frame_never_safe, | |
973 // _code_offsets.value(CodeOffsets::Frame_Complete), | |
974 frame_size_in_words(), | |
975 _oop_map_set, | |
976 save_arg_registers); | |
977 assert(rs != NULL && rs->is_runtime_stub(), "sanity check"); | |
978 | |
979 _stub_entry_point = rs->entry_point(); | |
980 } | |
981 } | |
982 } | |
983 | |
984 //------------------------------Init------------------------------------------- | |
985 // Prepare for a single compilation | |
986 void Compile::Init(int aliaslevel) { | |
987 _unique = 0; | |
988 _regalloc = NULL; | |
989 | |
990 _tf = NULL; // filled in later | |
991 _top = NULL; // cached later | |
992 _matcher = NULL; // filled in later | |
993 _cfg = NULL; // filled in later | |
994 | |
995 set_24_bit_selection_and_mode(Use24BitFP, false); | |
996 | |
997 _node_note_array = NULL; | |
998 _default_node_notes = NULL; | |
999 | |
1000 _immutable_memory = NULL; // filled in at first inquiry | |
1001 | |
1002 // Globally visible Nodes | |
1003 // First set TOP to NULL to give safe behavior during creation of RootNode | |
1004 set_cached_top_node(NULL); | |
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1005 set_root(new (this) RootNode()); |
0 | 1006 // Now that you have a Root to point to, create the real TOP |
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1007 set_cached_top_node( new (this) ConNode(Type::TOP) ); |
0 | 1008 set_recent_alloc(NULL, NULL); |
1009 | |
1010 // Create Debug Information Recorder to record scopes, oopmaps, etc. | |
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1011 env()->set_oop_recorder(new OopRecorder(env()->arena())); |
0 | 1012 env()->set_debug_info(new DebugInformationRecorder(env()->oop_recorder())); |
1013 env()->set_dependencies(new Dependencies(env())); | |
1014 | |
1015 _fixed_slots = 0; | |
1016 set_has_split_ifs(false); | |
1017 set_has_loops(has_method() && method()->has_loops()); // first approximation | |
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1018 set_has_stringbuilder(false); |
0 | 1019 _trap_can_recompile = false; // no traps emitted yet |
1020 _major_progress = true; // start out assuming good things will happen | |
1021 set_has_unsafe_access(false); | |
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1022 set_max_vector_size(0); |
0 | 1023 Copy::zero_to_bytes(_trap_hist, sizeof(_trap_hist)); |
1024 set_decompile_count(0); | |
1025 | |
418 | 1026 set_do_freq_based_layout(BlockLayoutByFrequency || method_has_option("BlockLayoutByFrequency")); |
1783 | 1027 set_num_loop_opts(LoopOptsCount); |
1028 set_do_inlining(Inline); | |
1029 set_max_inline_size(MaxInlineSize); | |
1030 set_freq_inline_size(FreqInlineSize); | |
1031 set_do_scheduling(OptoScheduling); | |
1032 set_do_count_invocations(false); | |
1033 set_do_method_data_update(false); | |
0 | 1034 |
1035 if (debug_info()->recording_non_safepoints()) { | |
1036 set_node_note_array(new(comp_arena()) GrowableArray<Node_Notes*> | |
1037 (comp_arena(), 8, 0, NULL)); | |
1038 set_default_node_notes(Node_Notes::make(this)); | |
1039 } | |
1040 | |
1041 // // -- Initialize types before each compile -- | |
1042 // // Update cached type information | |
1043 // if( _method && _method->constants() ) | |
1044 // Type::update_loaded_types(_method, _method->constants()); | |
1045 | |
1046 // Init alias_type map. | |
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1047 if (!_do_escape_analysis && aliaslevel == 3) |
0 | 1048 aliaslevel = 2; // No unique types without escape analysis |
1049 _AliasLevel = aliaslevel; | |
1050 const int grow_ats = 16; | |
1051 _max_alias_types = grow_ats; | |
1052 _alias_types = NEW_ARENA_ARRAY(comp_arena(), AliasType*, grow_ats); | |
1053 AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, grow_ats); | |
1054 Copy::zero_to_bytes(ats, sizeof(AliasType)*grow_ats); | |
1055 { | |
1056 for (int i = 0; i < grow_ats; i++) _alias_types[i] = &ats[i]; | |
1057 } | |
1058 // Initialize the first few types. | |
1059 _alias_types[AliasIdxTop]->Init(AliasIdxTop, NULL); | |
1060 _alias_types[AliasIdxBot]->Init(AliasIdxBot, TypePtr::BOTTOM); | |
1061 _alias_types[AliasIdxRaw]->Init(AliasIdxRaw, TypeRawPtr::BOTTOM); | |
1062 _num_alias_types = AliasIdxRaw+1; | |
1063 // Zero out the alias type cache. | |
1064 Copy::zero_to_bytes(_alias_cache, sizeof(_alias_cache)); | |
1065 // A NULL adr_type hits in the cache right away. Preload the right answer. | |
1066 probe_alias_cache(NULL)->_index = AliasIdxTop; | |
1067 | |
1068 _intrinsics = NULL; | |
1685 | 1069 _macro_nodes = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); |
1070 _predicate_opaqs = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); | |
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1071 _expensive_nodes = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); |
0 | 1072 register_library_intrinsics(); |
1073 } | |
1074 | |
1075 //---------------------------init_start---------------------------------------- | |
1076 // Install the StartNode on this compile object. | |
1077 void Compile::init_start(StartNode* s) { | |
1078 if (failing()) | |
1079 return; // already failing | |
1080 assert(s == start(), ""); | |
1081 } | |
1082 | |
1083 StartNode* Compile::start() const { | |
1084 assert(!failing(), ""); | |
1085 for (DUIterator_Fast imax, i = root()->fast_outs(imax); i < imax; i++) { | |
1086 Node* start = root()->fast_out(i); | |
1087 if( start->is_Start() ) | |
1088 return start->as_Start(); | |
1089 } | |
1090 ShouldNotReachHere(); | |
1091 return NULL; | |
1092 } | |
1093 | |
1094 //-------------------------------immutable_memory------------------------------------- | |
1095 // Access immutable memory | |
1096 Node* Compile::immutable_memory() { | |
1097 if (_immutable_memory != NULL) { | |
1098 return _immutable_memory; | |
1099 } | |
1100 StartNode* s = start(); | |
1101 for (DUIterator_Fast imax, i = s->fast_outs(imax); true; i++) { | |
1102 Node *p = s->fast_out(i); | |
1103 if (p != s && p->as_Proj()->_con == TypeFunc::Memory) { | |
1104 _immutable_memory = p; | |
1105 return _immutable_memory; | |
1106 } | |
1107 } | |
1108 ShouldNotReachHere(); | |
1109 return NULL; | |
1110 } | |
1111 | |
1112 //----------------------set_cached_top_node------------------------------------ | |
1113 // Install the cached top node, and make sure Node::is_top works correctly. | |
1114 void Compile::set_cached_top_node(Node* tn) { | |
1115 if (tn != NULL) verify_top(tn); | |
1116 Node* old_top = _top; | |
1117 _top = tn; | |
1118 // Calling Node::setup_is_top allows the nodes the chance to adjust | |
1119 // their _out arrays. | |
1120 if (_top != NULL) _top->setup_is_top(); | |
1121 if (old_top != NULL) old_top->setup_is_top(); | |
1122 assert(_top == NULL || top()->is_top(), ""); | |
1123 } | |
1124 | |
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1125 #ifdef ASSERT |
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1126 uint Compile::count_live_nodes_by_graph_walk() { |
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1127 Unique_Node_List useful(comp_arena()); |
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1128 // Get useful node list by walking the graph. |
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1129 identify_useful_nodes(useful); |
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1130 return useful.size(); |
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1131 } |
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1132 |
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1133 void Compile::print_missing_nodes() { |
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1134 |
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1135 // Return if CompileLog is NULL and PrintIdealNodeCount is false. |
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1136 if ((_log == NULL) && (! PrintIdealNodeCount)) { |
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1137 return; |
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1138 } |
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1139 |
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1140 // This is an expensive function. It is executed only when the user |
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1141 // specifies VerifyIdealNodeCount option or otherwise knows the |
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1142 // additional work that needs to be done to identify reachable nodes |
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1143 // by walking the flow graph and find the missing ones using |
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1144 // _dead_node_list. |
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1145 |
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1146 Unique_Node_List useful(comp_arena()); |
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1147 // Get useful node list by walking the graph. |
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1148 identify_useful_nodes(useful); |
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1149 |
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1150 uint l_nodes = C->live_nodes(); |
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1151 uint l_nodes_by_walk = useful.size(); |
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1152 |
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1153 if (l_nodes != l_nodes_by_walk) { |
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1154 if (_log != NULL) { |
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1155 _log->begin_head("mismatched_nodes count='%d'", abs((int) (l_nodes - l_nodes_by_walk))); |
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1156 _log->stamp(); |
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1157 _log->end_head(); |
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1158 } |
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1159 VectorSet& useful_member_set = useful.member_set(); |
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1160 int last_idx = l_nodes_by_walk; |
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1161 for (int i = 0; i < last_idx; i++) { |
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1162 if (useful_member_set.test(i)) { |
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1163 if (_dead_node_list.test(i)) { |
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1164 if (_log != NULL) { |
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1165 _log->elem("mismatched_node_info node_idx='%d' type='both live and dead'", i); |
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1166 } |
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1167 if (PrintIdealNodeCount) { |
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1168 // Print the log message to tty |
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1169 tty->print_cr("mismatched_node idx='%d' both live and dead'", i); |
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1170 useful.at(i)->dump(); |
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1171 } |
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1172 } |
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1173 } |
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1174 else if (! _dead_node_list.test(i)) { |
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1175 if (_log != NULL) { |
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1176 _log->elem("mismatched_node_info node_idx='%d' type='neither live nor dead'", i); |
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1177 } |
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1178 if (PrintIdealNodeCount) { |
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1179 // Print the log message to tty |
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1180 tty->print_cr("mismatched_node idx='%d' type='neither live nor dead'", i); |
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1181 } |
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1182 } |
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1183 } |
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1184 if (_log != NULL) { |
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1185 _log->tail("mismatched_nodes"); |
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1186 } |
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1187 } |
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1188 } |
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1189 #endif |
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1190 |
0 | 1191 #ifndef PRODUCT |
1192 void Compile::verify_top(Node* tn) const { | |
1193 if (tn != NULL) { | |
1194 assert(tn->is_Con(), "top node must be a constant"); | |
1195 assert(((ConNode*)tn)->type() == Type::TOP, "top node must have correct type"); | |
1196 assert(tn->in(0) != NULL, "must have live top node"); | |
1197 } | |
1198 } | |
1199 #endif | |
1200 | |
1201 | |
1202 ///-------------------Managing Per-Node Debug & Profile Info------------------- | |
1203 | |
1204 void Compile::grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by) { | |
1205 guarantee(arr != NULL, ""); | |
1206 int num_blocks = arr->length(); | |
1207 if (grow_by < num_blocks) grow_by = num_blocks; | |
1208 int num_notes = grow_by * _node_notes_block_size; | |
1209 Node_Notes* notes = NEW_ARENA_ARRAY(node_arena(), Node_Notes, num_notes); | |
1210 Copy::zero_to_bytes(notes, num_notes * sizeof(Node_Notes)); | |
1211 while (num_notes > 0) { | |
1212 arr->append(notes); | |
1213 notes += _node_notes_block_size; | |
1214 num_notes -= _node_notes_block_size; | |
1215 } | |
1216 assert(num_notes == 0, "exact multiple, please"); | |
1217 } | |
1218 | |
1219 bool Compile::copy_node_notes_to(Node* dest, Node* source) { | |
1220 if (source == NULL || dest == NULL) return false; | |
1221 | |
1222 if (dest->is_Con()) | |
1223 return false; // Do not push debug info onto constants. | |
1224 | |
1225 #ifdef ASSERT | |
1226 // Leave a bread crumb trail pointing to the original node: | |
1227 if (dest != NULL && dest != source && dest->debug_orig() == NULL) { | |
1228 dest->set_debug_orig(source); | |
1229 } | |
1230 #endif | |
1231 | |
1232 if (node_note_array() == NULL) | |
1233 return false; // Not collecting any notes now. | |
1234 | |
1235 // This is a copy onto a pre-existing node, which may already have notes. | |
1236 // If both nodes have notes, do not overwrite any pre-existing notes. | |
1237 Node_Notes* source_notes = node_notes_at(source->_idx); | |
1238 if (source_notes == NULL || source_notes->is_clear()) return false; | |
1239 Node_Notes* dest_notes = node_notes_at(dest->_idx); | |
1240 if (dest_notes == NULL || dest_notes->is_clear()) { | |
1241 return set_node_notes_at(dest->_idx, source_notes); | |
1242 } | |
1243 | |
1244 Node_Notes merged_notes = (*source_notes); | |
1245 // The order of operations here ensures that dest notes will win... | |
1246 merged_notes.update_from(dest_notes); | |
1247 return set_node_notes_at(dest->_idx, &merged_notes); | |
1248 } | |
1249 | |
1250 | |
1251 //--------------------------allow_range_check_smearing------------------------- | |
1252 // Gating condition for coalescing similar range checks. | |
1253 // Sometimes we try 'speculatively' replacing a series of a range checks by a | |
1254 // single covering check that is at least as strong as any of them. | |
1255 // If the optimization succeeds, the simplified (strengthened) range check | |
1256 // will always succeed. If it fails, we will deopt, and then give up | |
1257 // on the optimization. | |
1258 bool Compile::allow_range_check_smearing() const { | |
1259 // If this method has already thrown a range-check, | |
1260 // assume it was because we already tried range smearing | |
1261 // and it failed. | |
1262 uint already_trapped = trap_count(Deoptimization::Reason_range_check); | |
1263 return !already_trapped; | |
1264 } | |
1265 | |
1266 | |
1267 //------------------------------flatten_alias_type----------------------------- | |
1268 const TypePtr *Compile::flatten_alias_type( const TypePtr *tj ) const { | |
1269 int offset = tj->offset(); | |
1270 TypePtr::PTR ptr = tj->ptr(); | |
1271 | |
247 | 1272 // Known instance (scalarizable allocation) alias only with itself. |
1273 bool is_known_inst = tj->isa_oopptr() != NULL && | |
1274 tj->is_oopptr()->is_known_instance(); | |
1275 | |
0 | 1276 // Process weird unsafe references. |
1277 if (offset == Type::OffsetBot && (tj->isa_instptr() /*|| tj->isa_klassptr()*/)) { | |
1278 assert(InlineUnsafeOps, "indeterminate pointers come only from unsafe ops"); | |
247 | 1279 assert(!is_known_inst, "scalarizable allocation should not have unsafe references"); |
0 | 1280 tj = TypeOopPtr::BOTTOM; |
1281 ptr = tj->ptr(); | |
1282 offset = tj->offset(); | |
1283 } | |
1284 | |
1285 // Array pointers need some flattening | |
1286 const TypeAryPtr *ta = tj->isa_aryptr(); | |
247 | 1287 if( ta && is_known_inst ) { |
1288 if ( offset != Type::OffsetBot && | |
1289 offset > arrayOopDesc::length_offset_in_bytes() ) { | |
1290 offset = Type::OffsetBot; // Flatten constant access into array body only | |
1291 tj = ta = TypeAryPtr::make(ptr, ta->ary(), ta->klass(), true, offset, ta->instance_id()); | |
1292 } | |
1293 } else if( ta && _AliasLevel >= 2 ) { | |
0 | 1294 // For arrays indexed by constant indices, we flatten the alias |
1295 // space to include all of the array body. Only the header, klass | |
1296 // and array length can be accessed un-aliased. | |
1297 if( offset != Type::OffsetBot ) { | |
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1298 if( ta->const_oop() ) { // MethodData* or Method* |
0 | 1299 offset = Type::OffsetBot; // Flatten constant access into array body |
247 | 1300 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),ta->ary(),ta->klass(),false,offset); |
0 | 1301 } else if( offset == arrayOopDesc::length_offset_in_bytes() ) { |
1302 // range is OK as-is. | |
1303 tj = ta = TypeAryPtr::RANGE; | |
1304 } else if( offset == oopDesc::klass_offset_in_bytes() ) { | |
1305 tj = TypeInstPtr::KLASS; // all klass loads look alike | |
1306 ta = TypeAryPtr::RANGE; // generic ignored junk | |
1307 ptr = TypePtr::BotPTR; | |
1308 } else if( offset == oopDesc::mark_offset_in_bytes() ) { | |
1309 tj = TypeInstPtr::MARK; | |
1310 ta = TypeAryPtr::RANGE; // generic ignored junk | |
1311 ptr = TypePtr::BotPTR; | |
1312 } else { // Random constant offset into array body | |
1313 offset = Type::OffsetBot; // Flatten constant access into array body | |
247 | 1314 tj = ta = TypeAryPtr::make(ptr,ta->ary(),ta->klass(),false,offset); |
0 | 1315 } |
1316 } | |
1317 // Arrays of fixed size alias with arrays of unknown size. | |
1318 if (ta->size() != TypeInt::POS) { | |
1319 const TypeAry *tary = TypeAry::make(ta->elem(), TypeInt::POS); | |
247 | 1320 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,ta->klass(),false,offset); |
0 | 1321 } |
1322 // Arrays of known objects become arrays of unknown objects. | |
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1323 if (ta->elem()->isa_narrowoop() && ta->elem() != TypeNarrowOop::BOTTOM) { |
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1324 const TypeAry *tary = TypeAry::make(TypeNarrowOop::BOTTOM, ta->size()); |
247 | 1325 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset); |
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1326 } |
0 | 1327 if (ta->elem()->isa_oopptr() && ta->elem() != TypeInstPtr::BOTTOM) { |
1328 const TypeAry *tary = TypeAry::make(TypeInstPtr::BOTTOM, ta->size()); | |
247 | 1329 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset); |
0 | 1330 } |
1331 // Arrays of bytes and of booleans both use 'bastore' and 'baload' so | |
1332 // cannot be distinguished by bytecode alone. | |
1333 if (ta->elem() == TypeInt::BOOL) { | |
1334 const TypeAry *tary = TypeAry::make(TypeInt::BYTE, ta->size()); | |
1335 ciKlass* aklass = ciTypeArrayKlass::make(T_BYTE); | |
247 | 1336 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,aklass,false,offset); |
0 | 1337 } |
1338 // During the 2nd round of IterGVN, NotNull castings are removed. | |
1339 // Make sure the Bottom and NotNull variants alias the same. | |
1340 // Also, make sure exact and non-exact variants alias the same. | |
1341 if( ptr == TypePtr::NotNull || ta->klass_is_exact() ) { | |
3789 | 1342 tj = ta = TypeAryPtr::make(TypePtr::BotPTR,ta->ary(),ta->klass(),false,offset); |
0 | 1343 } |
1344 } | |
1345 | |
1346 // Oop pointers need some flattening | |
1347 const TypeInstPtr *to = tj->isa_instptr(); | |
1348 if( to && _AliasLevel >= 2 && to != TypeOopPtr::BOTTOM ) { | |
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1349 ciInstanceKlass *k = to->klass()->as_instance_klass(); |
0 | 1350 if( ptr == TypePtr::Constant ) { |
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1351 if (to->klass() != ciEnv::current()->Class_klass() || |
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1352 offset < k->size_helper() * wordSize) { |
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1353 // No constant oop pointers (such as Strings); they alias with |
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1354 // unknown strings. |
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1355 assert(!is_known_inst, "not scalarizable allocation"); |
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1356 tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset); |
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1357 } |
247 | 1358 } else if( is_known_inst ) { |
163 | 1359 tj = to; // Keep NotNull and klass_is_exact for instance type |
0 | 1360 } else if( ptr == TypePtr::NotNull || to->klass_is_exact() ) { |
1361 // During the 2nd round of IterGVN, NotNull castings are removed. | |
1362 // Make sure the Bottom and NotNull variants alias the same. | |
1363 // Also, make sure exact and non-exact variants alias the same. | |
247 | 1364 tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset); |
0 | 1365 } |
1366 // Canonicalize the holder of this field | |
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1367 if (offset >= 0 && offset < instanceOopDesc::base_offset_in_bytes()) { |
0 | 1368 // First handle header references such as a LoadKlassNode, even if the |
1369 // object's klass is unloaded at compile time (4965979). | |
247 | 1370 if (!is_known_inst) { // Do it only for non-instance types |
1371 tj = to = TypeInstPtr::make(TypePtr::BotPTR, env()->Object_klass(), false, NULL, offset); | |
1372 } | |
0 | 1373 } else if (offset < 0 || offset >= k->size_helper() * wordSize) { |
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1374 // Static fields are in the space above the normal instance |
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1375 // fields in the java.lang.Class instance. |
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1376 if (to->klass() != ciEnv::current()->Class_klass()) { |
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1377 to = NULL; |
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1378 tj = TypeOopPtr::BOTTOM; |
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1379 offset = tj->offset(); |
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1380 } |
0 | 1381 } else { |
1382 ciInstanceKlass *canonical_holder = k->get_canonical_holder(offset); | |
1383 if (!k->equals(canonical_holder) || tj->offset() != offset) { | |
247 | 1384 if( is_known_inst ) { |
1385 tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, true, NULL, offset, to->instance_id()); | |
1386 } else { | |
1387 tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, false, NULL, offset); | |
1388 } | |
0 | 1389 } |
1390 } | |
1391 } | |
1392 | |
1393 // Klass pointers to object array klasses need some flattening | |
1394 const TypeKlassPtr *tk = tj->isa_klassptr(); | |
1395 if( tk ) { | |
1396 // If we are referencing a field within a Klass, we need | |
1397 // to assume the worst case of an Object. Both exact and | |
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1398 // inexact types must flatten to the same alias class so |
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1399 // use NotNull as the PTR. |
0 | 1400 if ( offset == Type::OffsetBot || (offset >= 0 && (size_t)offset < sizeof(Klass)) ) { |
1401 | |
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1402 tj = tk = TypeKlassPtr::make(TypePtr::NotNull, |
0 | 1403 TypeKlassPtr::OBJECT->klass(), |
1404 offset); | |
1405 } | |
1406 | |
1407 ciKlass* klass = tk->klass(); | |
1408 if( klass->is_obj_array_klass() ) { | |
1409 ciKlass* k = TypeAryPtr::OOPS->klass(); | |
1410 if( !k || !k->is_loaded() ) // Only fails for some -Xcomp runs | |
1411 k = TypeInstPtr::BOTTOM->klass(); | |
1412 tj = tk = TypeKlassPtr::make( TypePtr::NotNull, k, offset ); | |
1413 } | |
1414 | |
1415 // Check for precise loads from the primary supertype array and force them | |
1416 // to the supertype cache alias index. Check for generic array loads from | |
1417 // the primary supertype array and also force them to the supertype cache | |
1418 // alias index. Since the same load can reach both, we need to merge | |
1419 // these 2 disparate memories into the same alias class. Since the | |
1420 // primary supertype array is read-only, there's no chance of confusion | |
1421 // where we bypass an array load and an array store. | |
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1422 int primary_supers_offset = in_bytes(Klass::primary_supers_offset()); |
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1423 if (offset == Type::OffsetBot || |
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1424 (offset >= primary_supers_offset && |
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1425 offset < (int)(primary_supers_offset + Klass::primary_super_limit() * wordSize)) || |
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1426 offset == (int)in_bytes(Klass::secondary_super_cache_offset())) { |
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1427 offset = in_bytes(Klass::secondary_super_cache_offset()); |
0 | 1428 tj = tk = TypeKlassPtr::make( TypePtr::NotNull, tk->klass(), offset ); |
1429 } | |
1430 } | |
1431 | |
1432 // Flatten all Raw pointers together. | |
1433 if (tj->base() == Type::RawPtr) | |
1434 tj = TypeRawPtr::BOTTOM; | |
1435 | |
1436 if (tj->base() == Type::AnyPtr) | |
1437 tj = TypePtr::BOTTOM; // An error, which the caller must check for. | |
1438 | |
1439 // Flatten all to bottom for now | |
1440 switch( _AliasLevel ) { | |
1441 case 0: | |
1442 tj = TypePtr::BOTTOM; | |
1443 break; | |
1444 case 1: // Flatten to: oop, static, field or array | |
1445 switch (tj->base()) { | |
1446 //case Type::AryPtr: tj = TypeAryPtr::RANGE; break; | |
1447 case Type::RawPtr: tj = TypeRawPtr::BOTTOM; break; | |
1448 case Type::AryPtr: // do not distinguish arrays at all | |
1449 case Type::InstPtr: tj = TypeInstPtr::BOTTOM; break; | |
1450 case Type::KlassPtr: tj = TypeKlassPtr::OBJECT; break; | |
1451 case Type::AnyPtr: tj = TypePtr::BOTTOM; break; // caller checks it | |
1452 default: ShouldNotReachHere(); | |
1453 } | |
1454 break; | |
605 | 1455 case 2: // No collapsing at level 2; keep all splits |
1456 case 3: // No collapsing at level 3; keep all splits | |
0 | 1457 break; |
1458 default: | |
1459 Unimplemented(); | |
1460 } | |
1461 | |
1462 offset = tj->offset(); | |
1463 assert( offset != Type::OffsetTop, "Offset has fallen from constant" ); | |
1464 | |
1465 assert( (offset != Type::OffsetBot && tj->base() != Type::AryPtr) || | |
1466 (offset == Type::OffsetBot && tj->base() == Type::AryPtr) || | |
1467 (offset == Type::OffsetBot && tj == TypeOopPtr::BOTTOM) || | |
1468 (offset == Type::OffsetBot && tj == TypePtr::BOTTOM) || | |
1469 (offset == oopDesc::mark_offset_in_bytes() && tj->base() == Type::AryPtr) || | |
1470 (offset == oopDesc::klass_offset_in_bytes() && tj->base() == Type::AryPtr) || | |
1471 (offset == arrayOopDesc::length_offset_in_bytes() && tj->base() == Type::AryPtr) , | |
1472 "For oops, klasses, raw offset must be constant; for arrays the offset is never known" ); | |
1473 assert( tj->ptr() != TypePtr::TopPTR && | |
1474 tj->ptr() != TypePtr::AnyNull && | |
1475 tj->ptr() != TypePtr::Null, "No imprecise addresses" ); | |
1476 // assert( tj->ptr() != TypePtr::Constant || | |
1477 // tj->base() == Type::RawPtr || | |
1478 // tj->base() == Type::KlassPtr, "No constant oop addresses" ); | |
1479 | |
1480 return tj; | |
1481 } | |
1482 | |
1483 void Compile::AliasType::Init(int i, const TypePtr* at) { | |
1484 _index = i; | |
1485 _adr_type = at; | |
1486 _field = NULL; | |
1487 _is_rewritable = true; // default | |
1488 const TypeOopPtr *atoop = (at != NULL) ? at->isa_oopptr() : NULL; | |
223 | 1489 if (atoop != NULL && atoop->is_known_instance()) { |
1490 const TypeOopPtr *gt = atoop->cast_to_instance_id(TypeOopPtr::InstanceBot); | |
0 | 1491 _general_index = Compile::current()->get_alias_index(gt); |
1492 } else { | |
1493 _general_index = 0; | |
1494 } | |
1495 } | |
1496 | |
1497 //---------------------------------print_on------------------------------------ | |
1498 #ifndef PRODUCT | |
1499 void Compile::AliasType::print_on(outputStream* st) { | |
1500 if (index() < 10) | |
1501 st->print("@ <%d> ", index()); | |
1502 else st->print("@ <%d>", index()); | |
1503 st->print(is_rewritable() ? " " : " RO"); | |
1504 int offset = adr_type()->offset(); | |
1505 if (offset == Type::OffsetBot) | |
1506 st->print(" +any"); | |
1507 else st->print(" +%-3d", offset); | |
1508 st->print(" in "); | |
1509 adr_type()->dump_on(st); | |
1510 const TypeOopPtr* tjp = adr_type()->isa_oopptr(); | |
1511 if (field() != NULL && tjp) { | |
1512 if (tjp->klass() != field()->holder() || | |
1513 tjp->offset() != field()->offset_in_bytes()) { | |
1514 st->print(" != "); | |
1515 field()->print(); | |
1516 st->print(" ***"); | |
1517 } | |
1518 } | |
1519 } | |
1520 | |
1521 void print_alias_types() { | |
1522 Compile* C = Compile::current(); | |
1523 tty->print_cr("--- Alias types, AliasIdxBot .. %d", C->num_alias_types()-1); | |
1524 for (int idx = Compile::AliasIdxBot; idx < C->num_alias_types(); idx++) { | |
1525 C->alias_type(idx)->print_on(tty); | |
1526 tty->cr(); | |
1527 } | |
1528 } | |
1529 #endif | |
1530 | |
1531 | |
1532 //----------------------------probe_alias_cache-------------------------------- | |
1533 Compile::AliasCacheEntry* Compile::probe_alias_cache(const TypePtr* adr_type) { | |
1534 intptr_t key = (intptr_t) adr_type; | |
1535 key ^= key >> logAliasCacheSize; | |
1536 return &_alias_cache[key & right_n_bits(logAliasCacheSize)]; | |
1537 } | |
1538 | |
1539 | |
1540 //-----------------------------grow_alias_types-------------------------------- | |
1541 void Compile::grow_alias_types() { | |
1542 const int old_ats = _max_alias_types; // how many before? | |
1543 const int new_ats = old_ats; // how many more? | |
1544 const int grow_ats = old_ats+new_ats; // how many now? | |
1545 _max_alias_types = grow_ats; | |
1546 _alias_types = REALLOC_ARENA_ARRAY(comp_arena(), AliasType*, _alias_types, old_ats, grow_ats); | |
1547 AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, new_ats); | |
1548 Copy::zero_to_bytes(ats, sizeof(AliasType)*new_ats); | |
1549 for (int i = 0; i < new_ats; i++) _alias_types[old_ats+i] = &ats[i]; | |
1550 } | |
1551 | |
1552 | |
1553 //--------------------------------find_alias_type------------------------------ | |
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1554 Compile::AliasType* Compile::find_alias_type(const TypePtr* adr_type, bool no_create, ciField* original_field) { |
0 | 1555 if (_AliasLevel == 0) |
1556 return alias_type(AliasIdxBot); | |
1557 | |
1558 AliasCacheEntry* ace = probe_alias_cache(adr_type); | |
1559 if (ace->_adr_type == adr_type) { | |
1560 return alias_type(ace->_index); | |
1561 } | |
1562 | |
1563 // Handle special cases. | |
1564 if (adr_type == NULL) return alias_type(AliasIdxTop); | |
1565 if (adr_type == TypePtr::BOTTOM) return alias_type(AliasIdxBot); | |
1566 | |
1567 // Do it the slow way. | |
1568 const TypePtr* flat = flatten_alias_type(adr_type); | |
1569 | |
1570 #ifdef ASSERT | |
1571 assert(flat == flatten_alias_type(flat), "idempotent"); | |
1572 assert(flat != TypePtr::BOTTOM, "cannot alias-analyze an untyped ptr"); | |
1573 if (flat->isa_oopptr() && !flat->isa_klassptr()) { | |
1574 const TypeOopPtr* foop = flat->is_oopptr(); | |
247 | 1575 // Scalarizable allocations have exact klass always. |
1576 bool exact = !foop->klass_is_exact() || foop->is_known_instance(); | |
1577 const TypePtr* xoop = foop->cast_to_exactness(exact)->is_ptr(); | |
0 | 1578 assert(foop == flatten_alias_type(xoop), "exactness must not affect alias type"); |
1579 } | |
1580 assert(flat == flatten_alias_type(flat), "exact bit doesn't matter"); | |
1581 #endif | |
1582 | |
1583 int idx = AliasIdxTop; | |
1584 for (int i = 0; i < num_alias_types(); i++) { | |
1585 if (alias_type(i)->adr_type() == flat) { | |
1586 idx = i; | |
1587 break; | |
1588 } | |
1589 } | |
1590 | |
1591 if (idx == AliasIdxTop) { | |
1592 if (no_create) return NULL; | |
1593 // Grow the array if necessary. | |
1594 if (_num_alias_types == _max_alias_types) grow_alias_types(); | |
1595 // Add a new alias type. | |
1596 idx = _num_alias_types++; | |
1597 _alias_types[idx]->Init(idx, flat); | |
1598 if (flat == TypeInstPtr::KLASS) alias_type(idx)->set_rewritable(false); | |
1599 if (flat == TypeAryPtr::RANGE) alias_type(idx)->set_rewritable(false); | |
1600 if (flat->isa_instptr()) { | |
1601 if (flat->offset() == java_lang_Class::klass_offset_in_bytes() | |
1602 && flat->is_instptr()->klass() == env()->Class_klass()) | |
1603 alias_type(idx)->set_rewritable(false); | |
1604 } | |
1605 if (flat->isa_klassptr()) { | |
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1606 if (flat->offset() == in_bytes(Klass::super_check_offset_offset())) |
0 | 1607 alias_type(idx)->set_rewritable(false); |
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1608 if (flat->offset() == in_bytes(Klass::modifier_flags_offset())) |
0 | 1609 alias_type(idx)->set_rewritable(false); |
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1610 if (flat->offset() == in_bytes(Klass::access_flags_offset())) |
0 | 1611 alias_type(idx)->set_rewritable(false); |
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1612 if (flat->offset() == in_bytes(Klass::java_mirror_offset())) |
0 | 1613 alias_type(idx)->set_rewritable(false); |
1614 } | |
1615 // %%% (We would like to finalize JavaThread::threadObj_offset(), | |
1616 // but the base pointer type is not distinctive enough to identify | |
1617 // references into JavaThread.) | |
1618 | |
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1619 // Check for final fields. |
0 | 1620 const TypeInstPtr* tinst = flat->isa_instptr(); |
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1621 if (tinst && tinst->offset() >= instanceOopDesc::base_offset_in_bytes()) { |
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1622 ciField* field; |
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1623 if (tinst->const_oop() != NULL && |
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1624 tinst->klass() == ciEnv::current()->Class_klass() && |
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1625 tinst->offset() >= (tinst->klass()->as_instance_klass()->size_helper() * wordSize)) { |
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1626 // static field |
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1627 ciInstanceKlass* k = tinst->const_oop()->as_instance()->java_lang_Class_klass()->as_instance_klass(); |
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1628 field = k->get_field_by_offset(tinst->offset(), true); |
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1629 } else { |
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1630 ciInstanceKlass *k = tinst->klass()->as_instance_klass(); |
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1631 field = k->get_field_by_offset(tinst->offset(), false); |
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1632 } |
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1633 assert(field == NULL || |
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1634 original_field == NULL || |
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1635 (field->holder() == original_field->holder() && |
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1636 field->offset() == original_field->offset() && |
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1637 field->is_static() == original_field->is_static()), "wrong field?"); |
0 | 1638 // Set field() and is_rewritable() attributes. |
1639 if (field != NULL) alias_type(idx)->set_field(field); | |
1640 } | |
1641 } | |
1642 | |
1643 // Fill the cache for next time. | |
1644 ace->_adr_type = adr_type; | |
1645 ace->_index = idx; | |
1646 assert(alias_type(adr_type) == alias_type(idx), "type must be installed"); | |
1647 | |
1648 // Might as well try to fill the cache for the flattened version, too. | |
1649 AliasCacheEntry* face = probe_alias_cache(flat); | |
1650 if (face->_adr_type == NULL) { | |
1651 face->_adr_type = flat; | |
1652 face->_index = idx; | |
1653 assert(alias_type(flat) == alias_type(idx), "flat type must work too"); | |
1654 } | |
1655 | |
1656 return alias_type(idx); | |
1657 } | |
1658 | |
1659 | |
1660 Compile::AliasType* Compile::alias_type(ciField* field) { | |
1661 const TypeOopPtr* t; | |
1662 if (field->is_static()) | |
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1663 t = TypeInstPtr::make(field->holder()->java_mirror()); |
0 | 1664 else |
1665 t = TypeOopPtr::make_from_klass_raw(field->holder()); | |
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1666 AliasType* atp = alias_type(t->add_offset(field->offset_in_bytes()), field); |
0 | 1667 assert(field->is_final() == !atp->is_rewritable(), "must get the rewritable bits correct"); |
1668 return atp; | |
1669 } | |
1670 | |
1671 | |
1672 //------------------------------have_alias_type-------------------------------- | |
1673 bool Compile::have_alias_type(const TypePtr* adr_type) { | |
1674 AliasCacheEntry* ace = probe_alias_cache(adr_type); | |
1675 if (ace->_adr_type == adr_type) { | |
1676 return true; | |
1677 } | |
1678 | |
1679 // Handle special cases. | |
1680 if (adr_type == NULL) return true; | |
1681 if (adr_type == TypePtr::BOTTOM) return true; | |
1682 | |
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1683 return find_alias_type(adr_type, true, NULL) != NULL; |
0 | 1684 } |
1685 | |
1686 //-----------------------------must_alias-------------------------------------- | |
1687 // True if all values of the given address type are in the given alias category. | |
1688 bool Compile::must_alias(const TypePtr* adr_type, int alias_idx) { | |
1689 if (alias_idx == AliasIdxBot) return true; // the universal category | |
1690 if (adr_type == NULL) return true; // NULL serves as TypePtr::TOP | |
1691 if (alias_idx == AliasIdxTop) return false; // the empty category | |
1692 if (adr_type->base() == Type::AnyPtr) return false; // TypePtr::BOTTOM or its twins | |
1693 | |
1694 // the only remaining possible overlap is identity | |
1695 int adr_idx = get_alias_index(adr_type); | |
1696 assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, ""); | |
1697 assert(adr_idx == alias_idx || | |
1698 (alias_type(alias_idx)->adr_type() != TypeOopPtr::BOTTOM | |
1699 && adr_type != TypeOopPtr::BOTTOM), | |
1700 "should not be testing for overlap with an unsafe pointer"); | |
1701 return adr_idx == alias_idx; | |
1702 } | |
1703 | |
1704 //------------------------------can_alias-------------------------------------- | |
1705 // True if any values of the given address type are in the given alias category. | |
1706 bool Compile::can_alias(const TypePtr* adr_type, int alias_idx) { | |
1707 if (alias_idx == AliasIdxTop) return false; // the empty category | |
1708 if (adr_type == NULL) return false; // NULL serves as TypePtr::TOP | |
1709 if (alias_idx == AliasIdxBot) return true; // the universal category | |
1710 if (adr_type->base() == Type::AnyPtr) return true; // TypePtr::BOTTOM or its twins | |
1711 | |
1712 // the only remaining possible overlap is identity | |
1713 int adr_idx = get_alias_index(adr_type); | |
1714 assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, ""); | |
1715 return adr_idx == alias_idx; | |
1716 } | |
1717 | |
1718 | |
1719 | |
1720 //---------------------------pop_warm_call------------------------------------- | |
1721 WarmCallInfo* Compile::pop_warm_call() { | |
1722 WarmCallInfo* wci = _warm_calls; | |
1723 if (wci != NULL) _warm_calls = wci->remove_from(wci); | |
1724 return wci; | |
1725 } | |
1726 | |
1727 //----------------------------Inline_Warm-------------------------------------- | |
1728 int Compile::Inline_Warm() { | |
1729 // If there is room, try to inline some more warm call sites. | |
1730 // %%% Do a graph index compaction pass when we think we're out of space? | |
1731 if (!InlineWarmCalls) return 0; | |
1732 | |
1733 int calls_made_hot = 0; | |
1734 int room_to_grow = NodeCountInliningCutoff - unique(); | |
1735 int amount_to_grow = MIN2(room_to_grow, (int)NodeCountInliningStep); | |
1736 int amount_grown = 0; | |
1737 WarmCallInfo* call; | |
1738 while (amount_to_grow > 0 && (call = pop_warm_call()) != NULL) { | |
1739 int est_size = (int)call->size(); | |
1740 if (est_size > (room_to_grow - amount_grown)) { | |
1741 // This one won't fit anyway. Get rid of it. | |
1742 call->make_cold(); | |
1743 continue; | |
1744 } | |
1745 call->make_hot(); | |
1746 calls_made_hot++; | |
1747 amount_grown += est_size; | |
1748 amount_to_grow -= est_size; | |
1749 } | |
1750 | |
1751 if (calls_made_hot > 0) set_major_progress(); | |
1752 return calls_made_hot; | |
1753 } | |
1754 | |
1755 | |
1756 //----------------------------Finish_Warm-------------------------------------- | |
1757 void Compile::Finish_Warm() { | |
1758 if (!InlineWarmCalls) return; | |
1759 if (failing()) return; | |
1760 if (warm_calls() == NULL) return; | |
1761 | |
1762 // Clean up loose ends, if we are out of space for inlining. | |
1763 WarmCallInfo* call; | |
1764 while ((call = pop_warm_call()) != NULL) { | |
1765 call->make_cold(); | |
1766 } | |
1767 } | |
1768 | |
1172 | 1769 //---------------------cleanup_loop_predicates----------------------- |
1770 // Remove the opaque nodes that protect the predicates so that all unused | |
1771 // checks and uncommon_traps will be eliminated from the ideal graph | |
1772 void Compile::cleanup_loop_predicates(PhaseIterGVN &igvn) { | |
1773 if (predicate_count()==0) return; | |
1774 for (int i = predicate_count(); i > 0; i--) { | |
1775 Node * n = predicate_opaque1_node(i-1); | |
1776 assert(n->Opcode() == Op_Opaque1, "must be"); | |
1777 igvn.replace_node(n, n->in(1)); | |
1778 } | |
1779 assert(predicate_count()==0, "should be clean!"); | |
1780 } | |
0 | 1781 |
7473 | 1782 // StringOpts and late inlining of string methods |
1783 void Compile::inline_string_calls(bool parse_time) { | |
1784 { | |
1785 // remove useless nodes to make the usage analysis simpler | |
1786 ResourceMark rm; | |
1787 PhaseRemoveUseless pru(initial_gvn(), for_igvn()); | |
1788 } | |
1789 | |
1790 { | |
1791 ResourceMark rm; | |
1792 print_method("Before StringOpts", 3); | |
1793 PhaseStringOpts pso(initial_gvn(), for_igvn()); | |
1794 print_method("After StringOpts", 3); | |
1795 } | |
1796 | |
1797 // now inline anything that we skipped the first time around | |
1798 if (!parse_time) { | |
1799 _late_inlines_pos = _late_inlines.length(); | |
1800 } | |
1801 | |
1802 while (_string_late_inlines.length() > 0) { | |
1803 CallGenerator* cg = _string_late_inlines.pop(); | |
1804 cg->do_late_inline(); | |
1805 if (failing()) return; | |
1806 } | |
1807 _string_late_inlines.trunc_to(0); | |
1808 } | |
1809 | |
1810 void Compile::inline_incrementally_one(PhaseIterGVN& igvn) { | |
1811 assert(IncrementalInline, "incremental inlining should be on"); | |
1812 PhaseGVN* gvn = initial_gvn(); | |
1813 | |
1814 set_inlining_progress(false); | |
1815 for_igvn()->clear(); | |
1816 gvn->replace_with(&igvn); | |
1817 | |
1818 int i = 0; | |
1819 | |
1820 for (; i <_late_inlines.length() && !inlining_progress(); i++) { | |
1821 CallGenerator* cg = _late_inlines.at(i); | |
1822 _late_inlines_pos = i+1; | |
1823 cg->do_late_inline(); | |
1824 if (failing()) return; | |
1825 } | |
1826 int j = 0; | |
1827 for (; i < _late_inlines.length(); i++, j++) { | |
1828 _late_inlines.at_put(j, _late_inlines.at(i)); | |
1829 } | |
1830 _late_inlines.trunc_to(j); | |
1831 | |
1832 { | |
1833 ResourceMark rm; | |
1834 PhaseRemoveUseless pru(C->initial_gvn(), C->for_igvn()); | |
1835 } | |
1836 | |
1837 igvn = PhaseIterGVN(gvn); | |
1838 } | |
1839 | |
1840 // Perform incremental inlining until bound on number of live nodes is reached | |
1841 void Compile::inline_incrementally(PhaseIterGVN& igvn) { | |
1842 PhaseGVN* gvn = initial_gvn(); | |
1843 | |
1844 set_inlining_incrementally(true); | |
1845 set_inlining_progress(true); | |
1846 uint low_live_nodes = 0; | |
1847 | |
1848 while(inlining_progress() && _late_inlines.length() > 0) { | |
1849 | |
1850 if (live_nodes() > (uint)LiveNodeCountInliningCutoff) { | |
1851 if (low_live_nodes < (uint)LiveNodeCountInliningCutoff * 8 / 10) { | |
1852 // PhaseIdealLoop is expensive so we only try it once we are | |
1853 // out of loop and we only try it again if the previous helped | |
1854 // got the number of nodes down significantly | |
1855 PhaseIdealLoop ideal_loop( igvn, false, true ); | |
1856 if (failing()) return; | |
1857 low_live_nodes = live_nodes(); | |
1858 _major_progress = true; | |
1859 } | |
1860 | |
1861 if (live_nodes() > (uint)LiveNodeCountInliningCutoff) { | |
1862 break; | |
1863 } | |
1864 } | |
1865 | |
1866 inline_incrementally_one(igvn); | |
1867 | |
1868 if (failing()) return; | |
1869 | |
1870 igvn.optimize(); | |
1871 | |
1872 if (failing()) return; | |
1873 } | |
1874 | |
1875 assert( igvn._worklist.size() == 0, "should be done with igvn" ); | |
1876 | |
1877 if (_string_late_inlines.length() > 0) { | |
1878 assert(has_stringbuilder(), "inconsistent"); | |
1879 for_igvn()->clear(); | |
1880 initial_gvn()->replace_with(&igvn); | |
1881 | |
1882 inline_string_calls(false); | |
1883 | |
1884 if (failing()) return; | |
1885 | |
1886 { | |
1887 ResourceMark rm; | |
1888 PhaseRemoveUseless pru(initial_gvn(), for_igvn()); | |
1889 } | |
1890 | |
1891 igvn = PhaseIterGVN(gvn); | |
1892 | |
1893 igvn.optimize(); | |
1894 } | |
1895 | |
1896 set_inlining_incrementally(false); | |
1897 } | |
1898 | |
1899 | |
0 | 1900 //------------------------------Optimize--------------------------------------- |
1901 // Given a graph, optimize it. | |
1902 void Compile::Optimize() { | |
1903 TracePhase t1("optimizer", &_t_optimizer, true); | |
1904 | |
1905 #ifndef PRODUCT | |
1906 if (env()->break_at_compile()) { | |
1907 BREAKPOINT; | |
1908 } | |
1909 | |
1910 #endif | |
1911 | |
1912 ResourceMark rm; | |
1913 int loop_opts_cnt; | |
1914 | |
1915 NOT_PRODUCT( verify_graph_edges(); ) | |
1916 | |
222 | 1917 print_method("After Parsing"); |
0 | 1918 |
1919 { | |
1920 // Iterative Global Value Numbering, including ideal transforms | |
1921 // Initialize IterGVN with types and values from parse-time GVN | |
1922 PhaseIterGVN igvn(initial_gvn()); | |
1923 { | |
1924 NOT_PRODUCT( TracePhase t2("iterGVN", &_t_iterGVN, TimeCompiler); ) | |
1925 igvn.optimize(); | |
1926 } | |
1927 | |
1928 print_method("Iter GVN 1", 2); | |
1929 | |
1930 if (failing()) return; | |
1931 | |
7473 | 1932 inline_incrementally(igvn); |
1933 | |
1934 print_method("Incremental Inline", 2); | |
1935 | |
1936 if (failing()) return; | |
1937 | |
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1938 // No more new expensive nodes will be added to the list from here |
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1939 // so keep only the actual candidates for optimizations. |
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1940 cleanup_expensive_nodes(igvn); |
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1941 |
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1942 // Perform escape analysis |
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1943 if (_do_escape_analysis && ConnectionGraph::has_candidates(this)) { |
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1944 if (has_loops()) { |
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1945 // Cleanup graph (remove dead nodes). |
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1946 TracePhase t2("idealLoop", &_t_idealLoop, true); |
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1947 PhaseIdealLoop ideal_loop( igvn, false, true ); |
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1948 if (major_progress()) print_method("PhaseIdealLoop before EA", 2); |
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1949 if (failing()) return; |
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1950 } |
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1951 ConnectionGraph::do_analysis(this, &igvn); |
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1952 |
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1953 if (failing()) return; |
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1954 |
4115 | 1955 // Optimize out fields loads from scalar replaceable allocations. |
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1956 igvn.optimize(); |
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1957 print_method("Iter GVN after EA", 2); |
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1958 |
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1959 if (failing()) return; |
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1960 |
4115 | 1961 if (congraph() != NULL && macro_count() > 0) { |
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1962 NOT_PRODUCT( TracePhase t2("macroEliminate", &_t_macroEliminate, TimeCompiler); ) |
4115 | 1963 PhaseMacroExpand mexp(igvn); |
1964 mexp.eliminate_macro_nodes(); | |
1965 igvn.set_delay_transform(false); | |
1966 | |
1967 igvn.optimize(); | |
1968 print_method("Iter GVN after eliminating allocations and locks", 2); | |
1969 | |
1970 if (failing()) return; | |
1971 } | |
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1972 } |
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1973 |
0 | 1974 // Loop transforms on the ideal graph. Range Check Elimination, |
1975 // peeling, unrolling, etc. | |
1976 | |
1977 // Set loop opts counter | |
1978 loop_opts_cnt = num_loop_opts(); | |
1979 if((loop_opts_cnt > 0) && (has_loops() || has_split_ifs())) { | |
1980 { | |
1981 TracePhase t2("idealLoop", &_t_idealLoop, true); | |
2445 | 1982 PhaseIdealLoop ideal_loop( igvn, true ); |
0 | 1983 loop_opts_cnt--; |
1984 if (major_progress()) print_method("PhaseIdealLoop 1", 2); | |
1985 if (failing()) return; | |
1986 } | |
1987 // Loop opts pass if partial peeling occurred in previous pass | |
1988 if(PartialPeelLoop && major_progress() && (loop_opts_cnt > 0)) { | |
1989 TracePhase t3("idealLoop", &_t_idealLoop, true); | |
2445 | 1990 PhaseIdealLoop ideal_loop( igvn, false ); |
0 | 1991 loop_opts_cnt--; |
1992 if (major_progress()) print_method("PhaseIdealLoop 2", 2); | |
1993 if (failing()) return; | |
1994 } | |
1995 // Loop opts pass for loop-unrolling before CCP | |
1996 if(major_progress() && (loop_opts_cnt > 0)) { | |
1997 TracePhase t4("idealLoop", &_t_idealLoop, true); | |
2445 | 1998 PhaseIdealLoop ideal_loop( igvn, false ); |
0 | 1999 loop_opts_cnt--; |
2000 if (major_progress()) print_method("PhaseIdealLoop 3", 2); | |
2001 } | |
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2002 if (!failing()) { |
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2003 // Verify that last round of loop opts produced a valid graph |
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2004 NOT_PRODUCT( TracePhase t2("idealLoopVerify", &_t_idealLoopVerify, TimeCompiler); ) |
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2005 PhaseIdealLoop::verify(igvn); |
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2006 } |
0 | 2007 } |
2008 if (failing()) return; | |
2009 | |
2010 // Conditional Constant Propagation; | |
2011 PhaseCCP ccp( &igvn ); | |
2012 assert( true, "Break here to ccp.dump_nodes_and_types(_root,999,1)"); | |
2013 { | |
2014 TracePhase t2("ccp", &_t_ccp, true); | |
2015 ccp.do_transform(); | |
2016 } | |
2017 print_method("PhaseCPP 1", 2); | |
2018 | |
2019 assert( true, "Break here to ccp.dump_old2new_map()"); | |
2020 | |
2021 // Iterative Global Value Numbering, including ideal transforms | |
2022 { | |
2023 NOT_PRODUCT( TracePhase t2("iterGVN2", &_t_iterGVN2, TimeCompiler); ) | |
2024 igvn = ccp; | |
2025 igvn.optimize(); | |
2026 } | |
2027 | |
2028 print_method("Iter GVN 2", 2); | |
2029 | |
2030 if (failing()) return; | |
2031 | |
2032 // Loop transforms on the ideal graph. Range Check Elimination, | |
2033 // peeling, unrolling, etc. | |
2034 if(loop_opts_cnt > 0) { | |
2035 debug_only( int cnt = 0; ); | |
2036 while(major_progress() && (loop_opts_cnt > 0)) { | |
2037 TracePhase t2("idealLoop", &_t_idealLoop, true); | |
2038 assert( cnt++ < 40, "infinite cycle in loop optimization" ); | |
2445 | 2039 PhaseIdealLoop ideal_loop( igvn, true); |
0 | 2040 loop_opts_cnt--; |
2041 if (major_progress()) print_method("PhaseIdealLoop iterations", 2); | |
2042 if (failing()) return; | |
2043 } | |
2044 } | |
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2045 |
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2046 { |
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2047 // Verify that all previous optimizations produced a valid graph |
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2048 // at least to this point, even if no loop optimizations were done. |
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2049 NOT_PRODUCT( TracePhase t2("idealLoopVerify", &_t_idealLoopVerify, TimeCompiler); ) |
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2050 PhaseIdealLoop::verify(igvn); |
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2051 } |
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2052 |
0 | 2053 { |
2054 NOT_PRODUCT( TracePhase t2("macroExpand", &_t_macroExpand, TimeCompiler); ) | |
2055 PhaseMacroExpand mex(igvn); | |
2056 if (mex.expand_macro_nodes()) { | |
2057 assert(failing(), "must bail out w/ explicit message"); | |
2058 return; | |
2059 } | |
2060 } | |
2061 | |
2062 } // (End scope of igvn; run destructor if necessary for asserts.) | |
2063 | |
7605 | 2064 dump_inlining(); |
0 | 2065 // A method with only infinite loops has no edges entering loops from root |
2066 { | |
2067 NOT_PRODUCT( TracePhase t2("graphReshape", &_t_graphReshaping, TimeCompiler); ) | |
2068 if (final_graph_reshaping()) { | |
2069 assert(failing(), "must bail out w/ explicit message"); | |
2070 return; | |
2071 } | |
2072 } | |
2073 | |
2074 print_method("Optimize finished", 2); | |
2075 } | |
2076 | |
2077 | |
2078 //------------------------------Code_Gen--------------------------------------- | |
2079 // Given a graph, generate code for it | |
2080 void Compile::Code_Gen() { | |
2081 if (failing()) return; | |
2082 | |
2083 // Perform instruction selection. You might think we could reclaim Matcher | |
2084 // memory PDQ, but actually the Matcher is used in generating spill code. | |
2085 // Internals of the Matcher (including some VectorSets) must remain live | |
2086 // for awhile - thus I cannot reclaim Matcher memory lest a VectorSet usage | |
2087 // set a bit in reclaimed memory. | |
2088 | |
2089 // In debug mode can dump m._nodes.dump() for mapping of ideal to machine | |
2090 // nodes. Mapping is only valid at the root of each matched subtree. | |
2091 NOT_PRODUCT( verify_graph_edges(); ) | |
2092 | |
2093 Node_List proj_list; | |
2094 Matcher m(proj_list); | |
2095 _matcher = &m; | |
2096 { | |
2097 TracePhase t2("matcher", &_t_matcher, true); | |
2098 m.match(); | |
2099 } | |
2100 // In debug mode can dump m._nodes.dump() for mapping of ideal to machine | |
2101 // nodes. Mapping is only valid at the root of each matched subtree. | |
2102 NOT_PRODUCT( verify_graph_edges(); ) | |
2103 | |
2104 // If you have too many nodes, or if matching has failed, bail out | |
2105 check_node_count(0, "out of nodes matching instructions"); | |
2106 if (failing()) return; | |
2107 | |
2108 // Build a proper-looking CFG | |
2109 PhaseCFG cfg(node_arena(), root(), m); | |
2110 _cfg = &cfg; | |
2111 { | |
2112 NOT_PRODUCT( TracePhase t2("scheduler", &_t_scheduler, TimeCompiler); ) | |
2113 cfg.Dominators(); | |
2114 if (failing()) return; | |
2115 | |
2116 NOT_PRODUCT( verify_graph_edges(); ) | |
2117 | |
2118 cfg.Estimate_Block_Frequency(); | |
2119 cfg.GlobalCodeMotion(m,unique(),proj_list); | |
5951 | 2120 if (failing()) return; |
0 | 2121 |
2122 print_method("Global code motion", 2); | |
2123 | |
2124 NOT_PRODUCT( verify_graph_edges(); ) | |
2125 | |
2126 debug_only( cfg.verify(); ) | |
2127 } | |
2128 NOT_PRODUCT( verify_graph_edges(); ) | |
2129 | |
2130 PhaseChaitin regalloc(unique(),cfg,m); | |
2131 _regalloc = ®alloc; | |
2132 { | |
2133 TracePhase t2("regalloc", &_t_registerAllocation, true); | |
2134 // Perform any platform dependent preallocation actions. This is used, | |
2135 // for example, to avoid taking an implicit null pointer exception | |
2136 // using the frame pointer on win95. | |
2137 _regalloc->pd_preallocate_hook(); | |
2138 | |
2139 // Perform register allocation. After Chaitin, use-def chains are | |
2140 // no longer accurate (at spill code) and so must be ignored. | |
2141 // Node->LRG->reg mappings are still accurate. | |
2142 _regalloc->Register_Allocate(); | |
2143 | |
2144 // Bail out if the allocator builds too many nodes | |
2145 if (failing()) return; | |
2146 } | |
2147 | |
2148 // Prior to register allocation we kept empty basic blocks in case the | |
2149 // the allocator needed a place to spill. After register allocation we | |
2150 // are not adding any new instructions. If any basic block is empty, we | |
2151 // can now safely remove it. | |
2152 { | |
418 | 2153 NOT_PRODUCT( TracePhase t2("blockOrdering", &_t_blockOrdering, TimeCompiler); ) |
2154 cfg.remove_empty(); | |
2155 if (do_freq_based_layout()) { | |
2156 PhaseBlockLayout layout(cfg); | |
2157 } else { | |
2158 cfg.set_loop_alignment(); | |
2159 } | |
2160 cfg.fixup_flow(); | |
0 | 2161 } |
2162 | |
2163 // Perform any platform dependent postallocation verifications. | |
2164 debug_only( _regalloc->pd_postallocate_verify_hook(); ) | |
2165 | |
2166 // Apply peephole optimizations | |
2167 if( OptoPeephole ) { | |
2168 NOT_PRODUCT( TracePhase t2("peephole", &_t_peephole, TimeCompiler); ) | |
2169 PhasePeephole peep( _regalloc, cfg); | |
2170 peep.do_transform(); | |
2171 } | |
2172 | |
2173 // Convert Nodes to instruction bits in a buffer | |
2174 { | |
2175 // %%%% workspace merge brought two timers together for one job | |
2176 TracePhase t2a("output", &_t_output, true); | |
2177 NOT_PRODUCT( TraceTime t2b(NULL, &_t_codeGeneration, TimeCompiler, false); ) | |
2178 Output(); | |
2179 } | |
2180 | |
222 | 2181 print_method("Final Code"); |
0 | 2182 |
2183 // He's dead, Jim. | |
2184 _cfg = (PhaseCFG*)0xdeadbeef; | |
2185 _regalloc = (PhaseChaitin*)0xdeadbeef; | |
2186 } | |
2187 | |
2188 | |
2189 //------------------------------dump_asm--------------------------------------- | |
2190 // Dump formatted assembly | |
2191 #ifndef PRODUCT | |
2192 void Compile::dump_asm(int *pcs, uint pc_limit) { | |
2193 bool cut_short = false; | |
2194 tty->print_cr("#"); | |
2195 tty->print("# "); _tf->dump(); tty->cr(); | |
2196 tty->print_cr("#"); | |
2197 | |
2198 // For all blocks | |
2199 int pc = 0x0; // Program counter | |
2200 char starts_bundle = ' '; | |
2201 _regalloc->dump_frame(); | |
2202 | |
2203 Node *n = NULL; | |
2204 for( uint i=0; i<_cfg->_num_blocks; i++ ) { | |
2205 if (VMThread::should_terminate()) { cut_short = true; break; } | |
2206 Block *b = _cfg->_blocks[i]; | |
2207 if (b->is_connector() && !Verbose) continue; | |
2208 n = b->_nodes[0]; | |
2209 if (pcs && n->_idx < pc_limit) | |
2210 tty->print("%3.3x ", pcs[n->_idx]); | |
2211 else | |
2212 tty->print(" "); | |
2213 b->dump_head( &_cfg->_bbs ); | |
2214 if (b->is_connector()) { | |
2215 tty->print_cr(" # Empty connector block"); | |
2216 } else if (b->num_preds() == 2 && b->pred(1)->is_CatchProj() && b->pred(1)->as_CatchProj()->_con == CatchProjNode::fall_through_index) { | |
2217 tty->print_cr(" # Block is sole successor of call"); | |
2218 } | |
2219 | |
2220 // For all instructions | |
2221 Node *delay = NULL; | |
2222 for( uint j = 0; j<b->_nodes.size(); j++ ) { | |
2223 if (VMThread::should_terminate()) { cut_short = true; break; } | |
2224 n = b->_nodes[j]; | |
2225 if (valid_bundle_info(n)) { | |
2226 Bundle *bundle = node_bundling(n); | |
2227 if (bundle->used_in_unconditional_delay()) { | |
2228 delay = n; | |
2229 continue; | |
2230 } | |
2231 if (bundle->starts_bundle()) | |
2232 starts_bundle = '+'; | |
2233 } | |
2234 | |
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2235 if (WizardMode) n->dump(); |
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2236 |
0 | 2237 if( !n->is_Region() && // Dont print in the Assembly |
2238 !n->is_Phi() && // a few noisely useless nodes | |
2239 !n->is_Proj() && | |
2240 !n->is_MachTemp() && | |
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2241 !n->is_SafePointScalarObject() && |
0 | 2242 !n->is_Catch() && // Would be nice to print exception table targets |
2243 !n->is_MergeMem() && // Not very interesting | |
2244 !n->is_top() && // Debug info table constants | |
2245 !(n->is_Con() && !n->is_Mach())// Debug info table constants | |
2246 ) { | |
2247 if (pcs && n->_idx < pc_limit) | |
2248 tty->print("%3.3x", pcs[n->_idx]); | |
2249 else | |
2250 tty->print(" "); | |
2251 tty->print(" %c ", starts_bundle); | |
2252 starts_bundle = ' '; | |
2253 tty->print("\t"); | |
2254 n->format(_regalloc, tty); | |
2255 tty->cr(); | |
2256 } | |
2257 | |
2258 // If we have an instruction with a delay slot, and have seen a delay, | |
2259 // then back up and print it | |
2260 if (valid_bundle_info(n) && node_bundling(n)->use_unconditional_delay()) { | |
2261 assert(delay != NULL, "no unconditional delay instruction"); | |
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2262 if (WizardMode) delay->dump(); |
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2263 |
0 | 2264 if (node_bundling(delay)->starts_bundle()) |
2265 starts_bundle = '+'; | |
2266 if (pcs && n->_idx < pc_limit) | |
2267 tty->print("%3.3x", pcs[n->_idx]); | |
2268 else | |
2269 tty->print(" "); | |
2270 tty->print(" %c ", starts_bundle); | |
2271 starts_bundle = ' '; | |
2272 tty->print("\t"); | |
2273 delay->format(_regalloc, tty); | |
2274 tty->print_cr(""); | |
2275 delay = NULL; | |
2276 } | |
2277 | |
2278 // Dump the exception table as well | |
2279 if( n->is_Catch() && (Verbose || WizardMode) ) { | |
2280 // Print the exception table for this offset | |
2281 _handler_table.print_subtable_for(pc); | |
2282 } | |
2283 } | |
2284 | |
2285 if (pcs && n->_idx < pc_limit) | |
2286 tty->print_cr("%3.3x", pcs[n->_idx]); | |
2287 else | |
2288 tty->print_cr(""); | |
2289 | |
2290 assert(cut_short || delay == NULL, "no unconditional delay branch"); | |
2291 | |
2292 } // End of per-block dump | |
2293 tty->print_cr(""); | |
2294 | |
2295 if (cut_short) tty->print_cr("*** disassembly is cut short ***"); | |
2296 } | |
2297 #endif | |
2298 | |
2299 //------------------------------Final_Reshape_Counts--------------------------- | |
2300 // This class defines counters to help identify when a method | |
2301 // may/must be executed using hardware with only 24-bit precision. | |
2302 struct Final_Reshape_Counts : public StackObj { | |
2303 int _call_count; // count non-inlined 'common' calls | |
2304 int _float_count; // count float ops requiring 24-bit precision | |
2305 int _double_count; // count double ops requiring more precision | |
2306 int _java_call_count; // count non-inlined 'java' calls | |
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2307 int _inner_loop_count; // count loops which need alignment |
0 | 2308 VectorSet _visited; // Visitation flags |
2309 Node_List _tests; // Set of IfNodes & PCTableNodes | |
2310 | |
2311 Final_Reshape_Counts() : | |
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2312 _call_count(0), _float_count(0), _double_count(0), |
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2313 _java_call_count(0), _inner_loop_count(0), |
0 | 2314 _visited( Thread::current()->resource_area() ) { } |
2315 | |
2316 void inc_call_count () { _call_count ++; } | |
2317 void inc_float_count () { _float_count ++; } | |
2318 void inc_double_count() { _double_count++; } | |
2319 void inc_java_call_count() { _java_call_count++; } | |
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2320 void inc_inner_loop_count() { _inner_loop_count++; } |
0 | 2321 |
2322 int get_call_count () const { return _call_count ; } | |
2323 int get_float_count () const { return _float_count ; } | |
2324 int get_double_count() const { return _double_count; } | |
2325 int get_java_call_count() const { return _java_call_count; } | |
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2326 int get_inner_loop_count() const { return _inner_loop_count; } |
0 | 2327 }; |
2328 | |
2329 static bool oop_offset_is_sane(const TypeInstPtr* tp) { | |
2330 ciInstanceKlass *k = tp->klass()->as_instance_klass(); | |
2331 // Make sure the offset goes inside the instance layout. | |
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2332 return k->contains_field_offset(tp->offset()); |
0 | 2333 // Note that OffsetBot and OffsetTop are very negative. |
2334 } | |
2335 | |
3248
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2336 // Eliminate trivially redundant StoreCMs and accumulate their |
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2337 // precedence edges. |
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2338 void Compile::eliminate_redundant_card_marks(Node* n) { |
3248
e6beb62de02d
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2339 assert(n->Opcode() == Op_StoreCM, "expected StoreCM"); |
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2340 if (n->in(MemNode::Address)->outcnt() > 1) { |
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2341 // There are multiple users of the same address so it might be |
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2342 // possible to eliminate some of the StoreCMs |
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2343 Node* mem = n->in(MemNode::Memory); |
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2344 Node* adr = n->in(MemNode::Address); |
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2345 Node* val = n->in(MemNode::ValueIn); |
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2346 Node* prev = n; |
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2347 bool done = false; |
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2348 // Walk the chain of StoreCMs eliminating ones that match. As |
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2349 // long as it's a chain of single users then the optimization is |
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2350 // safe. Eliminating partially redundant StoreCMs would require |
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2351 // cloning copies down the other paths. |
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2352 while (mem->Opcode() == Op_StoreCM && mem->outcnt() == 1 && !done) { |
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2353 if (adr == mem->in(MemNode::Address) && |
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2354 val == mem->in(MemNode::ValueIn)) { |
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2355 // redundant StoreCM |
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2356 if (mem->req() > MemNode::OopStore) { |
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2357 // Hasn't been processed by this code yet. |
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2358 n->add_prec(mem->in(MemNode::OopStore)); |
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2359 } else { |
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2360 // Already converted to precedence edge |
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2361 for (uint i = mem->req(); i < mem->len(); i++) { |
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2362 // Accumulate any precedence edges |
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2363 if (mem->in(i) != NULL) { |
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2364 n->add_prec(mem->in(i)); |
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2365 } |
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2366 } |
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2367 // Everything above this point has been processed. |
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2368 done = true; |
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2369 } |
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2370 // Eliminate the previous StoreCM |
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2371 prev->set_req(MemNode::Memory, mem->in(MemNode::Memory)); |
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2372 assert(mem->outcnt() == 0, "should be dead"); |
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2373 mem->disconnect_inputs(NULL, this); |
3248
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2374 } else { |
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2375 prev = mem; |
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2376 } |
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2377 mem = prev->in(MemNode::Memory); |
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2378 } |
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2379 } |
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2380 } |
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2381 |
0 | 2382 //------------------------------final_graph_reshaping_impl---------------------- |
2383 // Implement items 1-5 from final_graph_reshaping below. | |
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2384 void Compile::final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc) { |
0 | 2385 |
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|
2386 if ( n->outcnt() == 0 ) return; // dead node |
0 | 2387 uint nop = n->Opcode(); |
2388 | |
2389 // Check for 2-input instruction with "last use" on right input. | |
2390 // Swap to left input. Implements item (2). | |
2391 if( n->req() == 3 && // two-input instruction | |
2392 n->in(1)->outcnt() > 1 && // left use is NOT a last use | |
2393 (!n->in(1)->is_Phi() || n->in(1)->in(2) != n) && // it is not data loop | |
2394 n->in(2)->outcnt() == 1 &&// right use IS a last use | |
2395 !n->in(2)->is_Con() ) { // right use is not a constant | |
2396 // Check for commutative opcode | |
2397 switch( nop ) { | |
2398 case Op_AddI: case Op_AddF: case Op_AddD: case Op_AddL: | |
2399 case Op_MaxI: case Op_MinI: | |
2400 case Op_MulI: case Op_MulF: case Op_MulD: case Op_MulL: | |
2401 case Op_AndL: case Op_XorL: case Op_OrL: | |
2402 case Op_AndI: case Op_XorI: case Op_OrI: { | |
2403 // Move "last use" input to left by swapping inputs | |
2404 n->swap_edges(1, 2); | |
2405 break; | |
2406 } | |
2407 default: | |
2408 break; | |
2409 } | |
2410 } | |
2411 | |
1609 | 2412 #ifdef ASSERT |
2413 if( n->is_Mem() ) { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2414 int alias_idx = get_alias_index(n->as_Mem()->adr_type()); |
1609 | 2415 assert( n->in(0) != NULL || alias_idx != Compile::AliasIdxRaw || |
2416 // oop will be recorded in oop map if load crosses safepoint | |
2417 n->is_Load() && (n->as_Load()->bottom_type()->isa_oopptr() || | |
2418 LoadNode::is_immutable_value(n->in(MemNode::Address))), | |
2419 "raw memory operations should have control edge"); | |
2420 } | |
2421 #endif | |
0 | 2422 // Count FPU ops and common calls, implements item (3) |
2423 switch( nop ) { | |
2424 // Count all float operations that may use FPU | |
2425 case Op_AddF: | |
2426 case Op_SubF: | |
2427 case Op_MulF: | |
2428 case Op_DivF: | |
2429 case Op_NegF: | |
2430 case Op_ModF: | |
2431 case Op_ConvI2F: | |
2432 case Op_ConF: | |
2433 case Op_CmpF: | |
2434 case Op_CmpF3: | |
2435 // 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
|
2436 frc.inc_float_count(); |
0 | 2437 break; |
2438 | |
2439 case Op_ConvF2D: | |
2440 case Op_ConvD2F: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2441 frc.inc_float_count(); |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2442 frc.inc_double_count(); |
0 | 2443 break; |
2444 | |
2445 // Count all double operations that may use FPU | |
2446 case Op_AddD: | |
2447 case Op_SubD: | |
2448 case Op_MulD: | |
2449 case Op_DivD: | |
2450 case Op_NegD: | |
2451 case Op_ModD: | |
2452 case Op_ConvI2D: | |
2453 case Op_ConvD2I: | |
2454 // case Op_ConvL2D: // handled by leaf call | |
2455 // case Op_ConvD2L: // handled by leaf call | |
2456 case Op_ConD: | |
2457 case Op_CmpD: | |
2458 case Op_CmpD3: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2459 frc.inc_double_count(); |
0 | 2460 break; |
2461 case Op_Opaque1: // Remove Opaque Nodes before matching | |
2462 case Op_Opaque2: // Remove Opaque Nodes before matching | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2463 n->subsume_by(n->in(1), this); |
0 | 2464 break; |
2465 case Op_CallStaticJava: | |
2466 case Op_CallJava: | |
2467 case Op_CallDynamicJava: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2468 frc.inc_java_call_count(); // Count java call site; |
0 | 2469 case Op_CallRuntime: |
2470 case Op_CallLeaf: | |
2471 case Op_CallLeafNoFP: { | |
2472 assert( n->is_Call(), "" ); | |
2473 CallNode *call = n->as_Call(); | |
2474 // Count call sites where the FP mode bit would have to be flipped. | |
2475 // Do not count uncommon runtime calls: | |
2476 // uncommon_trap, _complete_monitor_locking, _complete_monitor_unlocking, | |
2477 // _new_Java, _new_typeArray, _new_objArray, _rethrow_Java, ... | |
2478 if( !call->is_CallStaticJava() || !call->as_CallStaticJava()->_name ) { | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2479 frc.inc_call_count(); // Count the call site |
0 | 2480 } else { // See if uncommon argument is shared |
2481 Node *n = call->in(TypeFunc::Parms); | |
2482 int nop = n->Opcode(); | |
2483 // Clone shared simple arguments to uncommon calls, item (1). | |
2484 if( n->outcnt() > 1 && | |
2485 !n->is_Proj() && | |
2486 nop != Op_CreateEx && | |
2487 nop != Op_CheckCastPP && | |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2488 nop != Op_DecodeN && |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2489 nop != Op_DecodeNKlass && |
0 | 2490 !n->is_Mem() ) { |
2491 Node *x = n->clone(); | |
2492 call->set_req( TypeFunc::Parms, x ); | |
2493 } | |
2494 } | |
2495 break; | |
2496 } | |
2497 | |
2498 case Op_StoreD: | |
2499 case Op_LoadD: | |
2500 case Op_LoadD_unaligned: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2501 frc.inc_double_count(); |
0 | 2502 goto handle_mem; |
2503 case Op_StoreF: | |
2504 case Op_LoadF: | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2505 frc.inc_float_count(); |
0 | 2506 goto handle_mem; |
2507 | |
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2508 case Op_StoreCM: |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2509 { |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2510 // Convert OopStore dependence into precedence edge |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2511 Node* prec = n->in(MemNode::OopStore); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2512 n->del_req(MemNode::OopStore); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2513 n->add_prec(prec); |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2514 eliminate_redundant_card_marks(n); |
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 |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2517 // fall through |
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2518 |
0 | 2519 case Op_StoreB: |
2520 case Op_StoreC: | |
2521 case Op_StorePConditional: | |
2522 case Op_StoreI: | |
2523 case Op_StoreL: | |
420
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
418
diff
changeset
|
2524 case Op_StoreIConditional: |
0 | 2525 case Op_StoreLConditional: |
2526 case Op_CompareAndSwapI: | |
2527 case Op_CompareAndSwapL: | |
2528 case Op_CompareAndSwapP: | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2529 case Op_CompareAndSwapN: |
6795
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2530 case Op_GetAndAddI: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2531 case Op_GetAndAddL: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2532 case Op_GetAndSetI: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2533 case Op_GetAndSetL: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2534 case Op_GetAndSetP: |
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2535 case Op_GetAndSetN: |
0 | 2536 case Op_StoreP: |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2537 case Op_StoreN: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2538 case Op_StoreNKlass: |
0 | 2539 case Op_LoadB: |
624 | 2540 case Op_LoadUB: |
558
3b5ac9e7e6ea
6796746: rename LoadC (char) opcode class to LoadUS (unsigned short)
twisti
parents:
492
diff
changeset
|
2541 case Op_LoadUS: |
0 | 2542 case Op_LoadI: |
2543 case Op_LoadKlass: | |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2544 case Op_LoadNKlass: |
0 | 2545 case Op_LoadL: |
2546 case Op_LoadL_unaligned: | |
2547 case Op_LoadPLocked: | |
2548 case Op_LoadP: | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2549 case Op_LoadN: |
0 | 2550 case Op_LoadRange: |
2551 case Op_LoadS: { | |
2552 handle_mem: | |
2553 #ifdef ASSERT | |
2554 if( VerifyOptoOopOffsets ) { | |
2555 assert( n->is_Mem(), "" ); | |
2556 MemNode *mem = (MemNode*)n; | |
2557 // Check to see if address types have grounded out somehow. | |
2558 const TypeInstPtr *tp = mem->in(MemNode::Address)->bottom_type()->isa_instptr(); | |
2559 assert( !tp || oop_offset_is_sane(tp), "" ); | |
2560 } | |
2561 #endif | |
2562 break; | |
2563 } | |
2564 | |
2565 case Op_AddP: { // Assert sane base pointers | |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2566 Node *addp = n->in(AddPNode::Address); |
0 | 2567 assert( !addp->is_AddP() || |
2568 addp->in(AddPNode::Base)->is_top() || // Top OK for allocation | |
2569 addp->in(AddPNode::Base) == n->in(AddPNode::Base), | |
2570 "Base pointers must match" ); | |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2571 #ifdef _LP64 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2572 if ((UseCompressedOops || UseCompressedKlassPointers) && |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2573 addp->Opcode() == Op_ConP && |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2574 addp == n->in(AddPNode::Base) && |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2575 n->in(AddPNode::Offset)->is_Con()) { |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2576 // 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
|
2577 // 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
|
2578 // instructions (4) then load 64-bits constant (7). |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2579 // 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
|
2580 const Type* t = addp->bottom_type(); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2581 if (t->isa_oopptr() || t->isa_klassptr()) { |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2582 Node* nn = NULL; |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2583 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2584 int op = t->isa_oopptr() ? Op_ConN : Op_ConNKlass; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2585 |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2586 // 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
|
2587 Node* r = root(); |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2588 uint cnt = r->outcnt(); |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2589 for (uint i = 0; i < cnt; i++) { |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2590 Node* m = r->raw_out(i); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2591 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
|
2592 m->bottom_type()->make_ptr() == t) { |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2593 nn = m; |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2594 break; |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2595 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2596 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2597 if (nn != NULL) { |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2598 // Decode a narrow oop to match address |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2599 // [R12 + narrow_oop_reg<<3 + offset] |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2600 if (t->isa_oopptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2601 nn = new (this) DecodeNNode(nn, t); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2602 } else { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2603 nn = new (this) DecodeNKlassNode(nn, t); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2604 } |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2605 n->set_req(AddPNode::Base, nn); |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2606 n->set_req(AddPNode::Address, nn); |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2607 if (addp->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2608 addp->disconnect_inputs(NULL, this); |
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2609 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2610 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2611 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2612 } |
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2613 #endif |
0 | 2614 break; |
2615 } | |
2616 | |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2617 #ifdef _LP64 |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2618 case Op_CastPP: |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2619 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
|
2620 Node* in1 = n->in(1); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2621 const Type* t = n->bottom_type(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2622 Node* new_in1 = in1->clone(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2623 new_in1->as_DecodeN()->set_type(t); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2624 |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2625 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
|
2626 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2627 // 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
|
2628 // 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
|
2629 // 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
|
2630 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2631 // [R12 + narrow_oop_reg<<3 + offset] |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2632 // NullCheck narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2633 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2634 // 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
|
2635 // 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
|
2636 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2637 // 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
|
2638 // [base_reg + offset] |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2639 // NullCheck base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2640 // |
605 | 2641 // 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
|
2642 // 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
|
2643 // 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
|
2644 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2645 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
|
2646 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2647 |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2648 n->subsume_by(new_in1, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2649 if (in1->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2650 in1->disconnect_inputs(NULL, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2651 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2652 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2653 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2654 |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2655 case Op_CmpP: |
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
164
diff
changeset
|
2656 // 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
|
2657 // other TypePtr related Ideal optimizations (for example, ptr nullness). |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2658 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
|
2659 Node* in1 = n->in(1); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2660 Node* in2 = n->in(2); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2661 if (!in1->is_DecodeNarrowPtr()) { |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2662 in2 = in1; |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2663 in1 = n->in(2); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2664 } |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2665 assert(in1->is_DecodeNarrowPtr(), "sanity"); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2666 |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2667 Node* new_in2 = NULL; |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2668 if (in2->is_DecodeNarrowPtr()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2669 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
|
2670 new_in2 = in2->in(1); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2671 } else if (in2->Opcode() == Op_ConP) { |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2672 const Type* t = in2->bottom_type(); |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2673 if (t == TypePtr::NULL_PTR) { |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2674 assert(in1->is_DecodeN(), "compare klass to null?"); |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2675 // 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
|
2676 // oops implicit null check is not generated. |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2677 // 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
|
2678 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
|
2679 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
|
2680 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2681 // This transformation together with CastPP transformation above |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2682 // 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
|
2683 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2684 // The original code after Optimize() |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2685 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2686 // LoadN memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2687 // decode narrow_oop_reg, base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2688 // CmpP base_reg, NULL |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2689 // CastPP base_reg // NotNull |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2690 // Load [base_reg + offset], val_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2691 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2692 // after these transformations will be |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2693 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2694 // LoadN memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2695 // CmpN narrow_oop_reg, NULL |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2696 // 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
|
2697 // Load [base_reg + offset], val_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2698 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2699 // 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
|
2700 // 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
|
2701 // final_graph_reshaping_walk()). |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2702 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2703 // 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
|
2704 // on x86: |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2705 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2706 // Load_narrow_oop memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2707 // 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
|
2708 // NullCheck narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2709 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2710 // and on sparc: |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2711 // |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2712 // Load_narrow_oop memory, narrow_oop_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2713 // 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
|
2714 // Load [base_reg + offset], val_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2715 // NullCheck base_reg |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2716 // |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2717 } else if (t->isa_oopptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2718 new_in2 = ConNode::make(this, t->make_narrowoop()); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2719 } else if (t->isa_klassptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2720 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
|
2721 } |
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2722 } |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2723 if (new_in2 != NULL) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2724 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
|
2725 n->subsume_by(cmpN, this); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2726 if (in1->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2727 in1->disconnect_inputs(NULL, this); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2728 } |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2729 if (in2->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2730 in2->disconnect_inputs(NULL, this); |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2731 } |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2732 } |
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2733 } |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
253
diff
changeset
|
2734 break; |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2735 |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2736 case Op_DecodeN: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2737 case Op_DecodeNKlass: |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2738 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
|
2739 // 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
|
2740 // 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
|
2741 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
|
2742 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2743 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2744 case Op_EncodeP: |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2745 case Op_EncodePKlass: { |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2746 Node* in1 = n->in(1); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2747 if (in1->is_DecodeNarrowPtr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2748 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
|
2749 } else if (in1->Opcode() == Op_ConP) { |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2750 const Type* t = in1->bottom_type(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2751 if (t == TypePtr::NULL_PTR) { |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2752 assert(t->isa_oopptr(), "null klass?"); |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2753 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
|
2754 } else if (t->isa_oopptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2755 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
|
2756 } else if (t->isa_klassptr()) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2757 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
|
2758 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2759 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2760 if (in1->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2761 in1->disconnect_inputs(NULL, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2762 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2763 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2764 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2765 |
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2766 case Op_Proj: { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2767 if (OptimizeStringConcat) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2768 ProjNode* p = n->as_Proj(); |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2769 if (p->_is_io_use) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2770 // Separate projections were used for the exception path which |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2771 // 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
|
2772 // then they will hang around and should just be replaced with |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2773 // the original one. |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2774 Node* proj = NULL; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2775 // Replace with just one |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2776 for (SimpleDUIterator i(p->in(0)); i.has_next(); i.next()) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2777 Node *use = i.get(); |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2778 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
|
2779 proj = use; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2780 break; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2781 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2782 } |
4767 | 2783 assert(proj != NULL, "must be found"); |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2784 p->subsume_by(proj, this); |
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2785 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2786 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2787 break; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2788 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2789 |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2790 case Op_Phi: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2791 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
|
2792 // 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
|
2793 // 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
|
2794 Node* unique_in = n->in(1); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2795 assert(unique_in != NULL, ""); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2796 uint cnt = n->req(); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2797 for (uint i = 2; i < cnt; i++) { |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2798 Node* m = n->in(i); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2799 assert(m != NULL, ""); |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2800 if (unique_in != m) |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2801 unique_in = NULL; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2802 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2803 if (unique_in != NULL) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2804 n->subsume_by(unique_in, this); |
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2805 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2806 } |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2807 break; |
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2808 |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2809 #endif |
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2810 |
0 | 2811 case Op_ModI: |
2812 if (UseDivMod) { | |
2813 // Check if a%b and a/b both exist | |
2814 Node* d = n->find_similar(Op_DivI); | |
2815 if (d) { | |
2816 // Replace them with a fused divmod if supported | |
2817 if (Matcher::has_match_rule(Op_DivModI)) { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2818 DivModINode* divmod = DivModINode::make(this, n); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2819 d->subsume_by(divmod->div_proj(), this); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2820 n->subsume_by(divmod->mod_proj(), this); |
0 | 2821 } else { |
2822 // 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
|
2823 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
|
2824 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
|
2825 n->subsume_by(sub, this); |
0 | 2826 } |
2827 } | |
2828 } | |
2829 break; | |
2830 | |
2831 case Op_ModL: | |
2832 if (UseDivMod) { | |
2833 // Check if a%b and a/b both exist | |
2834 Node* d = n->find_similar(Op_DivL); | |
2835 if (d) { | |
2836 // Replace them with a fused divmod if supported | |
2837 if (Matcher::has_match_rule(Op_DivModL)) { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2838 DivModLNode* divmod = DivModLNode::make(this, n); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2839 d->subsume_by(divmod->div_proj(), this); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2840 n->subsume_by(divmod->mod_proj(), this); |
0 | 2841 } else { |
2842 // 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
|
2843 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
|
2844 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
|
2845 n->subsume_by(sub, this); |
0 | 2846 } |
2847 } | |
2848 } | |
2849 break; | |
2850 | |
6179
8c92982cbbc4
7119644: Increase superword's vector size up to 256 bits
kvn
parents:
6143
diff
changeset
|
2851 case Op_LoadVector: |
8c92982cbbc4
7119644: Increase superword's vector size up to 256 bits
kvn
parents:
6143
diff
changeset
|
2852 case Op_StoreVector: |
0 | 2853 break; |
2854 | |
2855 case Op_PackB: | |
2856 case Op_PackS: | |
2857 case Op_PackI: | |
2858 case Op_PackF: | |
2859 case Op_PackL: | |
2860 case Op_PackD: | |
2861 if (n->req()-1 > 2) { | |
2862 // Replace many operand PackNodes with a binary tree for matching | |
2863 PackNode* p = (PackNode*) n; | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2864 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
|
2865 n->subsume_by(btp, this); |
0 | 2866 } |
2867 break; | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2868 case Op_Loop: |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2869 case Op_CountedLoop: |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2870 if (n->as_Loop()->is_inner_loop()) { |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2871 frc.inc_inner_loop_count(); |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2872 } |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2873 break; |
2401
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2874 case Op_LShiftI: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2875 case Op_RShiftI: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2876 case Op_URShiftI: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2877 case Op_LShiftL: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2878 case Op_RShiftL: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2879 case Op_URShiftL: |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2880 if (Matcher::need_masked_shift_count) { |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2881 // 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
|
2882 // lower 5/6 bits. We need to do the masking ourselves. |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2883 Node* in2 = n->in(2); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2884 juint mask = (n->bottom_type() == TypeInt::INT) ? (BitsPerInt - 1) : (BitsPerLong - 1); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2885 const TypeInt* t = in2->find_int_type(); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2886 if (t != NULL && t->is_con()) { |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2887 juint shift = t->get_con(); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2888 if (shift > mask) { // Unsigned cmp |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2889 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
|
2890 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2891 } else { |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2892 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
|
2893 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
|
2894 n->set_req(2, shift); |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2895 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2896 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2897 if (in2->outcnt() == 0) { // Remove dead node |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2898 in2->disconnect_inputs(NULL, this); |
2401
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2899 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2900 } |
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2901 break; |
0 | 2902 default: |
2903 assert( !n->is_Call(), "" ); | |
2904 assert( !n->is_Mem(), "" ); | |
2905 break; | |
2906 } | |
127 | 2907 |
2908 // Collect CFG split points | |
2909 if (n->is_MultiBranch()) | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2910 frc._tests.push(n); |
0 | 2911 } |
2912 | |
2913 //------------------------------final_graph_reshaping_walk--------------------- | |
2914 // Replacing Opaque nodes with their input in final_graph_reshaping_impl(), | |
2915 // 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
|
2916 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
|
2917 ResourceArea *area = Thread::current()->resource_area(); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2918 Unique_Node_List sfpt(area); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2919 |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2920 frc._visited.set(root->_idx); // first, mark node as visited |
0 | 2921 uint cnt = root->req(); |
2922 Node *n = root; | |
2923 uint i = 0; | |
2924 while (true) { | |
2925 if (i < cnt) { | |
2926 // Place all non-visited non-null inputs onto stack | |
2927 Node* m = n->in(i); | |
2928 ++i; | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2929 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
|
2930 if (m->is_SafePoint() && m->as_SafePoint()->jvms() != NULL) |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2931 sfpt.push(m); |
0 | 2932 cnt = m->req(); |
2933 nstack.push(n, i); // put on stack parent and next input's index | |
2934 n = m; | |
2935 i = 0; | |
2936 } | |
2937 } else { | |
2938 // Now do post-visit work | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2939 final_graph_reshaping_impl( n, frc ); |
0 | 2940 if (nstack.is_empty()) |
2941 break; // finished | |
2942 n = nstack.node(); // Get node from stack | |
2943 cnt = n->req(); | |
2944 i = nstack.index(); | |
2945 nstack.pop(); // Shift to the next node on stack | |
2946 } | |
2947 } | |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2948 |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
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parents:
1397
diff
changeset
|
2949 // Skip next transformation if compressed oops are not used. |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2950 if ((UseCompressedOops && !Matcher::gen_narrow_oop_implicit_null_checks()) || |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2951 (!UseCompressedOops && !UseCompressedKlassPointers)) |
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2952 return; |
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
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parents:
1397
diff
changeset
|
2953 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
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parents:
6843
diff
changeset
|
2954 // Go over safepoints nodes to skip DecodeN/DecodeNKlass nodes for debug edges. |
331
cecd8eb4e0ca
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parents:
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diff
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|
2955 // It could be done for an uncommon traps or any safepoints/calls |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
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parents:
6843
diff
changeset
|
2956 // if the DecodeN/DecodeNKlass node is referenced only in a debug info. |
331
cecd8eb4e0ca
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parents:
293
diff
changeset
|
2957 while (sfpt.size() > 0) { |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2958 n = sfpt.pop(); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
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parents:
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diff
changeset
|
2959 JVMState *jvms = n->as_SafePoint()->jvms(); |
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6706829: Compressed Oops: add debug info for narrow oops
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parents:
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diff
changeset
|
2960 assert(jvms != NULL, "sanity"); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
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diff
changeset
|
2961 int start = jvms->debug_start(); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
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diff
changeset
|
2962 int end = n->req(); |
cecd8eb4e0ca
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diff
changeset
|
2963 bool is_uncommon = (n->is_CallStaticJava() && |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
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diff
changeset
|
2964 n->as_CallStaticJava()->uncommon_trap_request() != 0); |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
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parents:
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diff
changeset
|
2965 for (int j = start; j < end; j++) { |
cecd8eb4e0ca
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diff
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|
2966 Node* in = n->in(j); |
6848
8e47bac5643a
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roland
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diff
changeset
|
2967 if (in->is_DecodeNarrowPtr()) { |
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
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diff
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|
2968 bool safe_to_skip = true; |
cecd8eb4e0ca
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kvn
parents:
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diff
changeset
|
2969 if (!is_uncommon ) { |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
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diff
changeset
|
2970 // Is it safe to skip? |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
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parents:
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diff
changeset
|
2971 for (uint i = 0; i < in->outcnt(); i++) { |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
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diff
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|
2972 Node* u = in->raw_out(i); |
cecd8eb4e0ca
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kvn
parents:
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diff
changeset
|
2973 if (!u->is_SafePoint() || |
cecd8eb4e0ca
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kvn
parents:
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diff
changeset
|
2974 u->is_Call() && u->as_Call()->has_non_debug_use(n)) { |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
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diff
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|
2975 safe_to_skip = false; |
cecd8eb4e0ca
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kvn
parents:
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diff
changeset
|
2976 } |
cecd8eb4e0ca
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kvn
parents:
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diff
changeset
|
2977 } |
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2978 } |
cecd8eb4e0ca
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kvn
parents:
293
diff
changeset
|
2979 if (safe_to_skip) { |
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parents:
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diff
changeset
|
2980 n->set_req(j, in->in(1)); |
cecd8eb4e0ca
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diff
changeset
|
2981 } |
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parents:
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diff
changeset
|
2982 if (in->outcnt() == 0) { |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2983 in->disconnect_inputs(NULL, this); |
331
cecd8eb4e0ca
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|
2984 } |
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parents:
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diff
changeset
|
2985 } |
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diff
changeset
|
2986 } |
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|
2987 } |
0 | 2988 } |
2989 | |
2990 //------------------------------final_graph_reshaping-------------------------- | |
2991 // Final Graph Reshaping. | |
2992 // | |
2993 // (1) Clone simple inputs to uncommon calls, so they can be scheduled late | |
2994 // and not commoned up and forced early. Must come after regular | |
2995 // optimizations to avoid GVN undoing the cloning. Clone constant | |
2996 // inputs to Loop Phis; these will be split by the allocator anyways. | |
2997 // Remove Opaque nodes. | |
2998 // (2) Move last-uses by commutative operations to the left input to encourage | |
2999 // Intel update-in-place two-address operations and better register usage | |
3000 // on RISCs. Must come after regular optimizations to avoid GVN Ideal | |
3001 // calls canonicalizing them back. | |
3002 // (3) Count the number of double-precision FP ops, single-precision FP ops | |
3003 // and call sites. On Intel, we can get correct rounding either by | |
3004 // forcing singles to memory (requires extra stores and loads after each | |
3005 // FP bytecode) or we can set a rounding mode bit (requires setting and | |
3006 // clearing the mode bit around call sites). The mode bit is only used | |
3007 // if the relative frequency of single FP ops to calls is low enough. | |
3008 // This is a key transform for SPEC mpeg_audio. | |
3009 // (4) Detect infinite loops; blobs of code reachable from above but not | |
3010 // below. Several of the Code_Gen algorithms fail on such code shapes, | |
3011 // so we simply bail out. Happens a lot in ZKM.jar, but also happens | |
3012 // from time to time in other codes (such as -Xcomp finalizer loops, etc). | |
3013 // Detection is by looking for IfNodes where only 1 projection is | |
3014 // reachable from below or CatchNodes missing some targets. | |
3015 // (5) Assert for insane oop offsets in debug mode. | |
3016 | |
3017 bool Compile::final_graph_reshaping() { | |
3018 // an infinite loop may have been eliminated by the optimizer, | |
3019 // in which case the graph will be empty. | |
3020 if (root()->req() == 1) { | |
3021 record_method_not_compilable("trivial infinite loop"); | |
3022 return true; | |
3023 } | |
3024 | |
8048
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3025 // Expensive nodes have their control input set to prevent the GVN |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3026 // from freely commoning them. There's no GVN beyond this point so |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3027 // no need to keep the control input. We want the expensive nodes to |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3028 // be freely moved to the least frequent code path by gcm. |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3029 assert(OptimizeExpensiveOps || expensive_count() == 0, "optimization off but list non empty?"); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3030 for (int i = 0; i < expensive_count(); i++) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3031 _expensive_nodes->at(i)->set_req(0, NULL); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3032 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3033 |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3034 Final_Reshape_Counts frc; |
0 | 3035 |
3036 // Visit everybody reachable! | |
3037 // Allocate stack of size C->unique()/2 to avoid frequent realloc | |
3038 Node_Stack nstack(unique() >> 1); | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3039 final_graph_reshaping_walk(nstack, root(), frc); |
0 | 3040 |
3041 // Check for unreachable (from below) code (i.e., infinite loops). | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3042 for( uint i = 0; i < frc._tests.size(); i++ ) { |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3043 MultiBranchNode *n = frc._tests[i]->as_MultiBranch(); |
127 | 3044 // Get number of CFG targets. |
0 | 3045 // Note that PCTables include exception targets after calls. |
127 | 3046 uint required_outcnt = n->required_outcnt(); |
3047 if (n->outcnt() != required_outcnt) { | |
0 | 3048 // Check for a few special cases. Rethrow Nodes never take the |
3049 // 'fall-thru' path, so expected kids is 1 less. | |
3050 if (n->is_PCTable() && n->in(0) && n->in(0)->in(0)) { | |
3051 if (n->in(0)->in(0)->is_Call()) { | |
3052 CallNode *call = n->in(0)->in(0)->as_Call(); | |
3053 if (call->entry_point() == OptoRuntime::rethrow_stub()) { | |
127 | 3054 required_outcnt--; // Rethrow always has 1 less kid |
0 | 3055 } else if (call->req() > TypeFunc::Parms && |
3056 call->is_CallDynamicJava()) { | |
3057 // Check for null receiver. In such case, the optimizer has | |
3058 // detected that the virtual call will always result in a null | |
3059 // pointer exception. The fall-through projection of this CatchNode | |
3060 // will not be populated. | |
3061 Node *arg0 = call->in(TypeFunc::Parms); | |
3062 if (arg0->is_Type() && | |
3063 arg0->as_Type()->type()->higher_equal(TypePtr::NULL_PTR)) { | |
127 | 3064 required_outcnt--; |
0 | 3065 } |
3066 } else if (call->entry_point() == OptoRuntime::new_array_Java() && | |
3067 call->req() > TypeFunc::Parms+1 && | |
3068 call->is_CallStaticJava()) { | |
3069 // Check for negative array length. In such case, the optimizer has | |
3070 // detected that the allocation attempt will always result in an | |
3071 // exception. There is no fall-through projection of this CatchNode . | |
3072 Node *arg1 = call->in(TypeFunc::Parms+1); | |
3073 if (arg1->is_Type() && | |
3074 arg1->as_Type()->type()->join(TypeInt::POS)->empty()) { | |
127 | 3075 required_outcnt--; |
0 | 3076 } |
3077 } | |
3078 } | |
3079 } | |
127 | 3080 // Recheck with a better notion of 'required_outcnt' |
3081 if (n->outcnt() != required_outcnt) { | |
0 | 3082 record_method_not_compilable("malformed control flow"); |
3083 return true; // Not all targets reachable! | |
3084 } | |
3085 } | |
3086 // Check that I actually visited all kids. Unreached kids | |
3087 // must be infinite loops. | |
3088 for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3089 if (!frc._visited.test(n->fast_out(j)->_idx)) { |
0 | 3090 record_method_not_compilable("infinite loop"); |
3091 return true; // Found unvisited kid; must be unreach | |
3092 } | |
3093 } | |
3094 | |
3095 // If original bytecodes contained a mixture of floats and doubles | |
3096 // check if the optimizer has made it homogenous, item (3). | |
929
cd18bd5e667c
6873777: FPU control word optimization still performed with SSE
never
parents:
921
diff
changeset
|
3097 if( Use24BitFPMode && Use24BitFP && UseSSE == 0 && |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3098 frc.get_float_count() > 32 && |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3099 frc.get_double_count() == 0 && |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3100 (10 * frc.get_call_count() < frc.get_float_count()) ) { |
0 | 3101 set_24_bit_selection_and_mode( false, true ); |
3102 } | |
3103 | |
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3104 set_java_calls(frc.get_java_call_count()); |
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3105 set_inner_loops(frc.get_inner_loop_count()); |
0 | 3106 |
3107 // No infinite loops, no reason to bail out. | |
3108 return false; | |
3109 } | |
3110 | |
3111 //-----------------------------too_many_traps---------------------------------- | |
3112 // Report if there are too many traps at the current method and bci. | |
3113 // Return true if there was a trap, and/or PerMethodTrapLimit is exceeded. | |
3114 bool Compile::too_many_traps(ciMethod* method, | |
3115 int bci, | |
3116 Deoptimization::DeoptReason reason) { | |
3117 ciMethodData* md = method->method_data(); | |
3118 if (md->is_empty()) { | |
3119 // Assume the trap has not occurred, or that it occurred only | |
3120 // because of a transient condition during start-up in the interpreter. | |
3121 return false; | |
3122 } | |
3123 if (md->has_trap_at(bci, reason) != 0) { | |
3124 // Assume PerBytecodeTrapLimit==0, for a more conservative heuristic. | |
3125 // Also, if there are multiple reasons, or if there is no per-BCI record, | |
3126 // assume the worst. | |
3127 if (log()) | |
3128 log()->elem("observe trap='%s' count='%d'", | |
3129 Deoptimization::trap_reason_name(reason), | |
3130 md->trap_count(reason)); | |
3131 return true; | |
3132 } else { | |
3133 // Ignore method/bci and see if there have been too many globally. | |
3134 return too_many_traps(reason, md); | |
3135 } | |
3136 } | |
3137 | |
3138 // Less-accurate variant which does not require a method and bci. | |
3139 bool Compile::too_many_traps(Deoptimization::DeoptReason reason, | |
3140 ciMethodData* logmd) { | |
3141 if (trap_count(reason) >= (uint)PerMethodTrapLimit) { | |
3142 // Too many traps globally. | |
3143 // Note that we use cumulative trap_count, not just md->trap_count. | |
3144 if (log()) { | |
3145 int mcount = (logmd == NULL)? -1: (int)logmd->trap_count(reason); | |
3146 log()->elem("observe trap='%s' count='0' mcount='%d' ccount='%d'", | |
3147 Deoptimization::trap_reason_name(reason), | |
3148 mcount, trap_count(reason)); | |
3149 } | |
3150 return true; | |
3151 } else { | |
3152 // The coast is clear. | |
3153 return false; | |
3154 } | |
3155 } | |
3156 | |
3157 //--------------------------too_many_recompiles-------------------------------- | |
3158 // Report if there are too many recompiles at the current method and bci. | |
3159 // Consults PerBytecodeRecompilationCutoff and PerMethodRecompilationCutoff. | |
3160 // Is not eager to return true, since this will cause the compiler to use | |
3161 // Action_none for a trap point, to avoid too many recompilations. | |
3162 bool Compile::too_many_recompiles(ciMethod* method, | |
3163 int bci, | |
3164 Deoptimization::DeoptReason reason) { | |
3165 ciMethodData* md = method->method_data(); | |
3166 if (md->is_empty()) { | |
3167 // Assume the trap has not occurred, or that it occurred only | |
3168 // because of a transient condition during start-up in the interpreter. | |
3169 return false; | |
3170 } | |
3171 // Pick a cutoff point well within PerBytecodeRecompilationCutoff. | |
3172 uint bc_cutoff = (uint) PerBytecodeRecompilationCutoff / 8; | |
3173 uint m_cutoff = (uint) PerMethodRecompilationCutoff / 2 + 1; // not zero | |
3174 Deoptimization::DeoptReason per_bc_reason | |
3175 = Deoptimization::reason_recorded_per_bytecode_if_any(reason); | |
3176 if ((per_bc_reason == Deoptimization::Reason_none | |
3177 || md->has_trap_at(bci, reason) != 0) | |
3178 // The trap frequency measure we care about is the recompile count: | |
3179 && md->trap_recompiled_at(bci) | |
3180 && md->overflow_recompile_count() >= bc_cutoff) { | |
3181 // Do not emit a trap here if it has already caused recompilations. | |
3182 // Also, if there are multiple reasons, or if there is no per-BCI record, | |
3183 // assume the worst. | |
3184 if (log()) | |
3185 log()->elem("observe trap='%s recompiled' count='%d' recompiles2='%d'", | |
3186 Deoptimization::trap_reason_name(reason), | |
3187 md->trap_count(reason), | |
3188 md->overflow_recompile_count()); | |
3189 return true; | |
3190 } else if (trap_count(reason) != 0 | |
3191 && decompile_count() >= m_cutoff) { | |
3192 // Too many recompiles globally, and we have seen this sort of trap. | |
3193 // Use cumulative decompile_count, not just md->decompile_count. | |
3194 if (log()) | |
3195 log()->elem("observe trap='%s' count='%d' mcount='%d' decompiles='%d' mdecompiles='%d'", | |
3196 Deoptimization::trap_reason_name(reason), | |
3197 md->trap_count(reason), trap_count(reason), | |
3198 md->decompile_count(), decompile_count()); | |
3199 return true; | |
3200 } else { | |
3201 // The coast is clear. | |
3202 return false; | |
3203 } | |
3204 } | |
3205 | |
3206 | |
3207 #ifndef PRODUCT | |
3208 //------------------------------verify_graph_edges--------------------------- | |
3209 // Walk the Graph and verify that there is a one-to-one correspondence | |
3210 // between Use-Def edges and Def-Use edges in the graph. | |
3211 void Compile::verify_graph_edges(bool no_dead_code) { | |
3212 if (VerifyGraphEdges) { | |
3213 ResourceArea *area = Thread::current()->resource_area(); | |
3214 Unique_Node_List visited(area); | |
3215 // Call recursive graph walk to check edges | |
3216 _root->verify_edges(visited); | |
3217 if (no_dead_code) { | |
3218 // Now make sure that no visited node is used by an unvisited node. | |
3219 bool dead_nodes = 0; | |
3220 Unique_Node_List checked(area); | |
3221 while (visited.size() > 0) { | |
3222 Node* n = visited.pop(); | |
3223 checked.push(n); | |
3224 for (uint i = 0; i < n->outcnt(); i++) { | |
3225 Node* use = n->raw_out(i); | |
3226 if (checked.member(use)) continue; // already checked | |
3227 if (visited.member(use)) continue; // already in the graph | |
3228 if (use->is_Con()) continue; // a dead ConNode is OK | |
3229 // At this point, we have found a dead node which is DU-reachable. | |
3230 if (dead_nodes++ == 0) | |
3231 tty->print_cr("*** Dead nodes reachable via DU edges:"); | |
3232 use->dump(2); | |
3233 tty->print_cr("---"); | |
3234 checked.push(use); // No repeats; pretend it is now checked. | |
3235 } | |
3236 } | |
3237 assert(dead_nodes == 0, "using nodes must be reachable from root"); | |
3238 } | |
3239 } | |
3240 } | |
3241 #endif | |
3242 | |
3243 // The Compile object keeps track of failure reasons separately from the ciEnv. | |
3244 // This is required because there is not quite a 1-1 relation between the | |
3245 // ciEnv and its compilation task and the Compile object. Note that one | |
3246 // ciEnv might use two Compile objects, if C2Compiler::compile_method decides | |
3247 // to backtrack and retry without subsuming loads. Other than this backtracking | |
3248 // behavior, the Compile's failure reason is quietly copied up to the ciEnv | |
3249 // by the logic in C2Compiler. | |
3250 void Compile::record_failure(const char* reason) { | |
3251 if (log() != NULL) { | |
3252 log()->elem("failure reason='%s' phase='compile'", reason); | |
3253 } | |
3254 if (_failure_reason == NULL) { | |
3255 // Record the first failure reason. | |
3256 _failure_reason = reason; | |
3257 } | |
222 | 3258 if (!C->failure_reason_is(C2Compiler::retry_no_subsuming_loads())) { |
3259 C->print_method(_failure_reason); | |
3260 } | |
0 | 3261 _root = NULL; // flush the graph, too |
3262 } | |
3263 | |
3264 Compile::TracePhase::TracePhase(const char* name, elapsedTimer* accumulator, bool dolog) | |
7196
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7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
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changeset
|
3265 : TraceTime(NULL, accumulator, false NOT_PRODUCT( || TimeCompiler ), false), |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
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diff
changeset
|
3266 _phase_name(name), _dolog(dolog) |
0 | 3267 { |
3268 if (dolog) { | |
3269 C = Compile::current(); | |
3270 _log = C->log(); | |
3271 } else { | |
3272 C = NULL; | |
3273 _log = NULL; | |
3274 } | |
3275 if (_log != NULL) { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
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6888
diff
changeset
|
3276 _log->begin_head("phase name='%s' nodes='%d' live='%d'", _phase_name, C->unique(), C->live_nodes()); |
0 | 3277 _log->stamp(); |
3278 _log->end_head(); | |
3279 } | |
3280 } | |
3281 | |
3282 Compile::TracePhase::~TracePhase() { | |
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
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changeset
|
3283 |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
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diff
changeset
|
3284 C = Compile::current(); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
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diff
changeset
|
3285 if (_dolog) { |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
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diff
changeset
|
3286 _log = C->log(); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
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diff
changeset
|
3287 } else { |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
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diff
changeset
|
3288 _log = NULL; |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
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diff
changeset
|
3289 } |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
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changeset
|
3290 |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
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diff
changeset
|
3291 #ifdef ASSERT |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
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diff
changeset
|
3292 if (PrintIdealNodeCount) { |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
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diff
changeset
|
3293 tty->print_cr("phase name='%s' nodes='%d' live='%d' live_graph_walk='%d'", |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
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diff
changeset
|
3294 _phase_name, C->unique(), C->live_nodes(), C->count_live_nodes_by_graph_walk()); |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
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changeset
|
3295 } |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
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changeset
|
3296 |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
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diff
changeset
|
3297 if (VerifyIdealNodeCount) { |
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
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changeset
|
3298 Compile::current()->print_missing_nodes(); |
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7092905: C2: Keep track of the number of dead nodes
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diff
changeset
|
3299 } |
2aff40cb4703
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changeset
|
3300 #endif |
2aff40cb4703
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|
3301 |
0 | 3302 if (_log != NULL) { |
7196
2aff40cb4703
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bharadwaj
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6888
diff
changeset
|
3303 _log->done("phase name='%s' nodes='%d' live='%d'", _phase_name, C->unique(), C->live_nodes()); |
0 | 3304 } |
3305 } | |
2008 | 3306 |
3307 //============================================================================= | |
3308 // Two Constant's are equal when the type and the value are equal. | |
3309 bool Compile::Constant::operator==(const Constant& other) { | |
3310 if (type() != other.type() ) return false; | |
3311 if (can_be_reused() != other.can_be_reused()) return false; | |
3312 // For floating point values we compare the bit pattern. | |
3313 switch (type()) { | |
6725
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6964458: Reimplement class meta-data storage to use native memory
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6619
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changeset
|
3314 case T_FLOAT: return (_v._value.i == other._v._value.i); |
2008 | 3315 case T_LONG: |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3316 case T_DOUBLE: return (_v._value.j == other._v._value.j); |
2008 | 3317 case T_OBJECT: |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3318 case T_ADDRESS: return (_v._value.l == other._v._value.l); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
3319 case T_VOID: return (_v._value.l == other._v._value.l); // jump-table entries |
6888
cfe522e6461c
8000623: tools/javac/Diagnostics/6769027/T6769027.java crashes in PSPromotionManager::copy_to_survivor_space
kvn
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6849
diff
changeset
|
3320 case T_METADATA: return (_v._metadata == other._v._metadata); |
2008 | 3321 default: ShouldNotReachHere(); |
3322 } | |
3323 return false; | |
3324 } | |
3325 | |
3326 static int type_to_size_in_bytes(BasicType t) { | |
3327 switch (t) { | |
3328 case T_LONG: return sizeof(jlong ); | |
3329 case T_FLOAT: return sizeof(jfloat ); | |
3330 case T_DOUBLE: return sizeof(jdouble); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3331 case T_METADATA: return sizeof(Metadata*); |
2008 | 3332 // We use T_VOID as marker for jump-table entries (labels) which |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3333 // need an internal word relocation. |
2008 | 3334 case T_VOID: |
3335 case T_ADDRESS: | |
3336 case T_OBJECT: return sizeof(jobject); | |
3337 } | |
3338 | |
3339 ShouldNotReachHere(); | |
3340 return -1; | |
3341 } | |
3342 | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3343 int Compile::ConstantTable::qsort_comparator(Constant* a, Constant* b) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3344 // sort descending |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3345 if (a->freq() > b->freq()) return -1; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3346 if (a->freq() < b->freq()) return 1; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3347 return 0; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3348 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3349 |
2008 | 3350 void Compile::ConstantTable::calculate_offsets_and_size() { |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3351 // First, sort the array by frequencies. |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3352 _constants.sort(qsort_comparator); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3353 |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3354 #ifdef ASSERT |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3355 // Make sure all jump-table entries were sorted to the end of the |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3356 // array (they have a negative frequency). |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3357 bool found_void = false; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3358 for (int i = 0; i < _constants.length(); i++) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3359 Constant con = _constants.at(i); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3360 if (con.type() == T_VOID) |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3361 found_void = true; // jump-tables |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3362 else |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3363 assert(!found_void, "wrong sorting"); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3364 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3365 #endif |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3366 |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3367 int offset = 0; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3368 for (int i = 0; i < _constants.length(); i++) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3369 Constant* con = _constants.adr_at(i); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3370 |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3371 // Align offset for type. |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3372 int typesize = type_to_size_in_bytes(con->type()); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3373 offset = align_size_up(offset, typesize); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3374 con->set_offset(offset); // set constant's offset |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3375 |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3376 if (con->type() == T_VOID) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3377 MachConstantNode* n = (MachConstantNode*) con->get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3378 offset = offset + typesize * n->outcnt(); // expand jump-table |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3379 } else { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3380 offset = offset + typesize; |
2008 | 3381 } |
3382 } | |
3383 | |
3384 // Align size up to the next section start (which is insts; see | |
3385 // CodeBuffer::align_at_start). | |
3386 assert(_size == -1, "already set?"); | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3387 _size = align_size_up(offset, CodeEntryAlignment); |
2008 | 3388 } |
3389 | |
3390 void Compile::ConstantTable::emit(CodeBuffer& cb) { | |
3391 MacroAssembler _masm(&cb); | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3392 for (int i = 0; i < _constants.length(); i++) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3393 Constant con = _constants.at(i); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3394 address constant_addr; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3395 switch (con.type()) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3396 case T_LONG: constant_addr = _masm.long_constant( con.get_jlong() ); break; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3397 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
|
3398 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
|
3399 case T_OBJECT: { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3400 jobject obj = con.get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3401 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
|
3402 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
|
3403 break; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3404 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3405 case T_ADDRESS: { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3406 address addr = (address) con.get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3407 constant_addr = _masm.address_constant(addr); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3408 break; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3409 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3410 // 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
|
3411 // need an internal word relocation. |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3412 case T_VOID: { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3413 MachConstantNode* n = (MachConstantNode*) con.get_jobject(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3414 // 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
|
3415 // 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
|
3416 address dummy = (address) n; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3417 constant_addr = _masm.address_constant(dummy); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3418 // Expand jump-table |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3419 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
|
3420 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
|
3421 assert(temp_addr, "consts section too small"); |
2008 | 3422 } |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3423 break; |
2008 | 3424 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3425 case T_METADATA: { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3426 Metadata* obj = con.get_metadata(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3427 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
|
3428 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
|
3429 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3430 } |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3431 default: ShouldNotReachHere(); |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3432 } |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3433 assert(constant_addr, "consts section too small"); |
6268
6c5b7a6becc8
7187454: stack overflow in C2 compiler thread on Solaris x86
kvn
parents:
6179
diff
changeset
|
3434 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 | 3435 } |
3436 } | |
3437 | |
3438 int Compile::ConstantTable::find_offset(Constant& con) const { | |
3439 int idx = _constants.find(con); | |
3440 assert(idx != -1, "constant must be in constant table"); | |
3441 int offset = _constants.at(idx).offset(); | |
3442 assert(offset != -1, "constant table not emitted yet?"); | |
3443 return offset; | |
3444 } | |
3445 | |
3446 void Compile::ConstantTable::add(Constant& con) { | |
3447 if (con.can_be_reused()) { | |
3448 int idx = _constants.find(con); | |
3449 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
|
3450 _constants.adr_at(idx)->inc_freq(con.freq()); // increase the frequency by the current value |
2008 | 3451 return; |
3452 } | |
3453 } | |
3454 (void) _constants.append(con); | |
3455 } | |
3456 | |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3457 Compile::Constant Compile::ConstantTable::add(MachConstantNode* n, BasicType type, jvalue value) { |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3458 Block* b = Compile::current()->cfg()->_bbs[n->_idx]; |
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3459 Constant con(type, value, b->_freq); |
2008 | 3460 add(con); |
3461 return con; | |
3462 } | |
3463 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3464 Compile::Constant Compile::ConstantTable::add(Metadata* metadata) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3465 Constant con(metadata); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3466 add(con); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3467 return con; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6619
diff
changeset
|
3468 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6619
diff
changeset
|
3469 |
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
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4064
diff
changeset
|
3470 Compile::Constant Compile::ConstantTable::add(MachConstantNode* n, MachOper* oper) { |
2008 | 3471 jvalue value; |
3472 BasicType type = oper->type()->basic_type(); | |
3473 switch (type) { | |
3474 case T_LONG: value.j = oper->constantL(); break; | |
3475 case T_FLOAT: value.f = oper->constantF(); break; | |
3476 case T_DOUBLE: value.d = oper->constantD(); break; | |
3477 case T_OBJECT: | |
3478 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
|
3479 case T_METADATA: return add((Metadata*)oper->constant()); break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
3480 default: guarantee(false, err_msg_res("unhandled type: %s", type2name(type))); |
2008 | 3481 } |
4114
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7003454: order constants in constant table by number of references in code
twisti
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4064
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|
3482 return add(n, type, value); |
2008 | 3483 } |
3484 | |
4114
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7003454: order constants in constant table by number of references in code
twisti
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4064
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changeset
|
3485 Compile::Constant Compile::ConstantTable::add_jump_table(MachConstantNode* n) { |
2008 | 3486 jvalue value; |
3487 // We can use the node pointer here to identify the right jump-table | |
3488 // as this method is called from Compile::Fill_buffer right before | |
3489 // the MachNodes are emitted and the jump-table is filled (means the | |
3490 // MachNode pointers do not change anymore). | |
3491 value.l = (jobject) n; | |
4114
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changeset
|
3492 Constant con(T_VOID, value, next_jump_table_freq(), false); // Labels of a jump-table cannot be reused. |
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7003454: order constants in constant table by number of references in code
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diff
changeset
|
3493 add(con); |
2008 | 3494 return con; |
3495 } | |
3496 | |
3497 void Compile::ConstantTable::fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray<Label*> labels) const { | |
3498 // If called from Compile::scratch_emit_size do nothing. | |
3499 if (Compile::current()->in_scratch_emit_size()) return; | |
3500 | |
3501 assert(labels.is_nonempty(), "must be"); | |
6268
6c5b7a6becc8
7187454: stack overflow in C2 compiler thread on Solaris x86
kvn
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|
3502 assert((uint) labels.length() == n->outcnt(), err_msg_res("must be equal: %d == %d", labels.length(), n->outcnt())); |
2008 | 3503 |
3504 // Since MachConstantNode::constant_offset() also contains | |
3505 // table_base_offset() we need to subtract the table_base_offset() | |
3506 // to get the plain offset into the constant table. | |
3507 int offset = n->constant_offset() - table_base_offset(); | |
3508 | |
3509 MacroAssembler _masm(&cb); | |
3510 address* jump_table_base = (address*) (_masm.code()->consts()->start() + offset); | |
3511 | |
4114
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7003454: order constants in constant table by number of references in code
twisti
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diff
changeset
|
3512 for (uint i = 0; i < n->outcnt(); i++) { |
2008 | 3513 address* constant_addr = &jump_table_base[i]; |
6268
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7187454: stack overflow in C2 compiler thread on Solaris x86
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|
3514 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 | 3515 *constant_addr = cb.consts()->target(*labels.at(i), (address) constant_addr); |
3516 cb.consts()->relocate((address) constant_addr, relocInfo::internal_word_type); | |
3517 } | |
3518 } | |
7421
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
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7199
diff
changeset
|
3519 |
ad5dd04754ee
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7199
diff
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|
3520 void Compile::dump_inlining() { |
7605 | 3521 if (PrintInlining || PrintIntrinsics NOT_PRODUCT( || PrintOptoInlining)) { |
7473 | 3522 // Print inlining message for candidates that we couldn't inline |
3523 // for lack of space or non constant receiver | |
3524 for (int i = 0; i < _late_inlines.length(); i++) { | |
3525 CallGenerator* cg = _late_inlines.at(i); | |
3526 cg->print_inlining_late("live nodes > LiveNodeCountInliningCutoff"); | |
3527 } | |
3528 Unique_Node_List useful; | |
3529 useful.push(root()); | |
3530 for (uint next = 0; next < useful.size(); ++next) { | |
3531 Node* n = useful.at(next); | |
3532 if (n->is_Call() && n->as_Call()->generator() != NULL && n->as_Call()->generator()->call_node() == n) { | |
3533 CallNode* call = n->as_Call(); | |
3534 CallGenerator* cg = call->generator(); | |
3535 cg->print_inlining_late("receiver not constant"); | |
3536 } | |
3537 uint max = n->len(); | |
3538 for ( uint i = 0; i < max; ++i ) { | |
3539 Node *m = n->in(i); | |
3540 if ( m == NULL ) continue; | |
3541 useful.push(m); | |
3542 } | |
3543 } | |
7421
ad5dd04754ee
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roland
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7199
diff
changeset
|
3544 for (int i = 0; i < _print_inlining_list->length(); i++) { |
ad5dd04754ee
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roland
parents:
7199
diff
changeset
|
3545 tty->print(_print_inlining_list->at(i).ss()->as_string()); |
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parents:
7199
diff
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|
3546 } |
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7199
diff
changeset
|
3547 } |
ad5dd04754ee
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7199
diff
changeset
|
3548 } |
8048
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3549 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
changeset
|
3550 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
changeset
|
3551 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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parents:
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diff
changeset
|
3552 else if (n1->Opcode() > n2->Opcode()) return 1; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3553 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3554 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
|
3555 for (uint i = 1; i < n1->req(); i++) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3556 if (n1->in(i) < n2->in(i)) return -1; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3557 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
roland
parents:
7605
diff
changeset
|
3558 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3559 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3560 return 0; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3561 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3562 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3563 int Compile::cmp_expensive_nodes(Node** n1p, Node** n2p) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3564 Node* n1 = *n1p; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3565 Node* n2 = *n2p; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3566 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3567 return cmp_expensive_nodes(n1, n2); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3568 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3569 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3570 void Compile::sort_expensive_nodes() { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3571 if (!expensive_nodes_sorted()) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3572 _expensive_nodes->sort(cmp_expensive_nodes); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3573 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3574 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3575 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3576 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
|
3577 for (int i = 1; i < _expensive_nodes->length(); i++) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3578 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
|
3579 return false; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3580 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3581 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3582 return true; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3583 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3584 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3585 bool Compile::should_optimize_expensive_nodes(PhaseIterGVN &igvn) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3586 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
|
3587 return false; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3588 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3589 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3590 assert(OptimizeExpensiveOps, "optimization off?"); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3591 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3592 // 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
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7605
diff
changeset
|
3593 int j = 0; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3594 for (int i = 0; i < _expensive_nodes->length(); i++) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3595 Node* n = _expensive_nodes->at(i); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3596 if (!n->is_unreachable(igvn)) { |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3597 assert(n->is_expensive(), "should be expensive"); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3598 _expensive_nodes->at_put(j, n); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3599 j++; |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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diff
changeset
|
3600 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3601 } |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3602 _expensive_nodes->trunc_to(j); |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3603 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3604 // Then sort the list so that similar nodes are next to each other |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3605 // 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
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diff
changeset
|
3606 // inputs. |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3607 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
|
3608 |
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
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7605
diff
changeset
|
3609 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
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3610 if (cmp_expensive_nodes(_expensive_nodes->adr_at(i), _expensive_nodes->adr_at(i+1)) == 0) { |
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3611 return true; |
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|
3612 } |
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|
3613 } |
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|
3614 |
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|
3615 return false; |
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|
3616 } |
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|
3617 |
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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|
3618 void Compile::cleanup_expensive_nodes(PhaseIterGVN &igvn) { |
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3619 if (_expensive_nodes->length() == 0) { |
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3620 return; |
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3621 } |
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|
3622 |
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3623 assert(OptimizeExpensiveOps, "optimization off?"); |
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3624 |
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3625 // Sort to bring similar nodes next to each other and clear the |
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3626 // control input of nodes for which there's only a single copy. |
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3627 sort_expensive_nodes(); |
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|
3628 |
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3629 int j = 0; |
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3630 int identical = 0; |
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|
3631 int i = 0; |
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|
3632 for (; i < _expensive_nodes->length()-1; i++) { |
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|
3633 assert(j <= i, "can't write beyond current index"); |
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diff
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3634 if (_expensive_nodes->at(i)->Opcode() == _expensive_nodes->at(i+1)->Opcode()) { |
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|
3635 identical++; |
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|
3636 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
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|
3637 continue; |
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|
3638 } |
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|
3639 if (identical > 0) { |
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3640 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
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|
3641 identical = 0; |
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|
3642 } else { |
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|
3643 Node* n = _expensive_nodes->at(i); |
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|
3644 igvn.hash_delete(n); |
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|
3645 n->set_req(0, NULL); |
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|
3646 igvn.hash_insert(n); |
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|
3647 } |
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|
3648 } |
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|
3649 if (identical > 0) { |
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|
3650 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
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|
3651 } else if (_expensive_nodes->length() >= 1) { |
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|
3652 Node* n = _expensive_nodes->at(i); |
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|
3653 igvn.hash_delete(n); |
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|
3654 n->set_req(0, NULL); |
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|
3655 igvn.hash_insert(n); |
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|
3656 } |
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|
3657 _expensive_nodes->trunc_to(j); |
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|
3658 } |
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|
3659 |
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|
3660 void Compile::add_expensive_node(Node * n) { |
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diff
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|
3661 assert(!_expensive_nodes->contains(n), "duplicate entry in expensive list"); |
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diff
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|
3662 assert(n->is_expensive(), "expensive nodes with non-null control here only"); |
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diff
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|
3663 assert(!n->is_CFG() && !n->is_Mem(), "no cfg or memory nodes here"); |
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diff
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|
3664 if (OptimizeExpensiveOps) { |
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|
3665 _expensive_nodes->append(n); |
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|
3666 } else { |
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diff
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|
3667 // Clear control input and let IGVN optimize expensive nodes if |
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diff
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|
3668 // OptimizeExpensiveOps is off. |
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diff
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|
3669 n->set_req(0, NULL); |
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diff
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|
3670 } |
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diff
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|
3671 } |