Mercurial > hg > truffle
annotate src/share/vm/opto/compile.cpp @ 17795:a9becfeecd1b
Merge
| author | kvn |
|---|---|
| date | Wed, 22 Jan 2014 17:42:23 -0800 |
| parents | 849eb7bfceac 41b780b43b74 |
| children | 45467c53f178 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10405 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
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27 #include "asm/macroAssembler.inline.hpp" |
| 17622 | 28 #include "ci/ciReplay.hpp" |
| 1972 | 29 #include "classfile/systemDictionary.hpp" |
| 30 #include "code/exceptionHandlerTable.hpp" | |
| 31 #include "code/nmethod.hpp" | |
| 32 #include "compiler/compileLog.hpp" | |
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33 #include "compiler/disassembler.hpp" |
| 1972 | 34 #include "compiler/oopMap.hpp" |
| 35 #include "opto/addnode.hpp" | |
| 36 #include "opto/block.hpp" | |
| 37 #include "opto/c2compiler.hpp" | |
| 38 #include "opto/callGenerator.hpp" | |
| 39 #include "opto/callnode.hpp" | |
| 40 #include "opto/cfgnode.hpp" | |
| 41 #include "opto/chaitin.hpp" | |
| 42 #include "opto/compile.hpp" | |
| 43 #include "opto/connode.hpp" | |
| 44 #include "opto/divnode.hpp" | |
| 45 #include "opto/escape.hpp" | |
| 46 #include "opto/idealGraphPrinter.hpp" | |
| 47 #include "opto/loopnode.hpp" | |
| 48 #include "opto/machnode.hpp" | |
| 49 #include "opto/macro.hpp" | |
| 50 #include "opto/matcher.hpp" | |
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51 #include "opto/mathexactnode.hpp" |
| 1972 | 52 #include "opto/memnode.hpp" |
| 53 #include "opto/mulnode.hpp" | |
| 54 #include "opto/node.hpp" | |
| 55 #include "opto/opcodes.hpp" | |
| 56 #include "opto/output.hpp" | |
| 57 #include "opto/parse.hpp" | |
| 58 #include "opto/phaseX.hpp" | |
| 59 #include "opto/rootnode.hpp" | |
| 60 #include "opto/runtime.hpp" | |
| 61 #include "opto/stringopts.hpp" | |
| 62 #include "opto/type.hpp" | |
| 63 #include "opto/vectornode.hpp" | |
| 64 #include "runtime/arguments.hpp" | |
| 65 #include "runtime/signature.hpp" | |
| 66 #include "runtime/stubRoutines.hpp" | |
| 67 #include "runtime/timer.hpp" | |
| 10405 | 68 #include "trace/tracing.hpp" |
| 1972 | 69 #include "utilities/copy.hpp" |
| 70 #ifdef TARGET_ARCH_MODEL_x86_32 | |
| 71 # include "adfiles/ad_x86_32.hpp" | |
| 72 #endif | |
| 73 #ifdef TARGET_ARCH_MODEL_x86_64 | |
| 74 # include "adfiles/ad_x86_64.hpp" | |
| 75 #endif | |
| 76 #ifdef TARGET_ARCH_MODEL_sparc | |
| 77 # include "adfiles/ad_sparc.hpp" | |
| 78 #endif | |
| 79 #ifdef TARGET_ARCH_MODEL_zero | |
| 80 # include "adfiles/ad_zero.hpp" | |
| 81 #endif | |
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82 #ifdef TARGET_ARCH_MODEL_arm |
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83 # include "adfiles/ad_arm.hpp" |
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84 #endif |
| 14391 | 85 #ifdef TARGET_ARCH_MODEL_ppc_32 |
| 86 # include "adfiles/ad_ppc_32.hpp" | |
| 87 #endif | |
| 88 #ifdef TARGET_ARCH_MODEL_ppc_64 | |
| 89 # include "adfiles/ad_ppc_64.hpp" | |
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90 #endif |
| 0 | 91 |
| 2008 | 92 |
| 93 // -------------------- Compile::mach_constant_base_node ----------------------- | |
| 94 // Constant table base node singleton. | |
| 95 MachConstantBaseNode* Compile::mach_constant_base_node() { | |
| 96 if (_mach_constant_base_node == NULL) { | |
| 97 _mach_constant_base_node = new (C) MachConstantBaseNode(); | |
| 98 _mach_constant_base_node->add_req(C->root()); | |
| 99 } | |
| 100 return _mach_constant_base_node; | |
| 101 } | |
| 102 | |
| 103 | |
| 0 | 104 /// Support for intrinsics. |
| 105 | |
| 106 // Return the index at which m must be inserted (or already exists). | |
| 107 // The sort order is by the address of the ciMethod, with is_virtual as minor key. | |
| 108 int Compile::intrinsic_insertion_index(ciMethod* m, bool is_virtual) { | |
| 109 #ifdef ASSERT | |
| 110 for (int i = 1; i < _intrinsics->length(); i++) { | |
| 111 CallGenerator* cg1 = _intrinsics->at(i-1); | |
| 112 CallGenerator* cg2 = _intrinsics->at(i); | |
| 113 assert(cg1->method() != cg2->method() | |
| 114 ? cg1->method() < cg2->method() | |
| 115 : cg1->is_virtual() < cg2->is_virtual(), | |
| 116 "compiler intrinsics list must stay sorted"); | |
| 117 } | |
| 118 #endif | |
| 119 // Binary search sorted list, in decreasing intervals [lo, hi]. | |
| 120 int lo = 0, hi = _intrinsics->length()-1; | |
| 121 while (lo <= hi) { | |
| 122 int mid = (uint)(hi + lo) / 2; | |
| 123 ciMethod* mid_m = _intrinsics->at(mid)->method(); | |
| 124 if (m < mid_m) { | |
| 125 hi = mid-1; | |
| 126 } else if (m > mid_m) { | |
| 127 lo = mid+1; | |
| 128 } else { | |
| 129 // look at minor sort key | |
| 130 bool mid_virt = _intrinsics->at(mid)->is_virtual(); | |
| 131 if (is_virtual < mid_virt) { | |
| 132 hi = mid-1; | |
| 133 } else if (is_virtual > mid_virt) { | |
| 134 lo = mid+1; | |
| 135 } else { | |
| 136 return mid; // exact match | |
| 137 } | |
| 138 } | |
| 139 } | |
| 140 return lo; // inexact match | |
| 141 } | |
| 142 | |
| 143 void Compile::register_intrinsic(CallGenerator* cg) { | |
| 144 if (_intrinsics == NULL) { | |
| 7473 | 145 _intrinsics = new (comp_arena())GrowableArray<CallGenerator*>(comp_arena(), 60, 0, NULL); |
| 0 | 146 } |
| 147 // This code is stolen from ciObjectFactory::insert. | |
| 148 // Really, GrowableArray should have methods for | |
| 149 // insert_at, remove_at, and binary_search. | |
| 150 int len = _intrinsics->length(); | |
| 151 int index = intrinsic_insertion_index(cg->method(), cg->is_virtual()); | |
| 152 if (index == len) { | |
| 153 _intrinsics->append(cg); | |
| 154 } else { | |
| 155 #ifdef ASSERT | |
| 156 CallGenerator* oldcg = _intrinsics->at(index); | |
| 157 assert(oldcg->method() != cg->method() || oldcg->is_virtual() != cg->is_virtual(), "don't register twice"); | |
| 158 #endif | |
| 159 _intrinsics->append(_intrinsics->at(len-1)); | |
| 160 int pos; | |
| 161 for (pos = len-2; pos >= index; pos--) { | |
| 162 _intrinsics->at_put(pos+1,_intrinsics->at(pos)); | |
| 163 } | |
| 164 _intrinsics->at_put(index, cg); | |
| 165 } | |
| 166 assert(find_intrinsic(cg->method(), cg->is_virtual()) == cg, "registration worked"); | |
| 167 } | |
| 168 | |
| 169 CallGenerator* Compile::find_intrinsic(ciMethod* m, bool is_virtual) { | |
| 170 assert(m->is_loaded(), "don't try this on unloaded methods"); | |
| 171 if (_intrinsics != NULL) { | |
| 172 int index = intrinsic_insertion_index(m, is_virtual); | |
| 173 if (index < _intrinsics->length() | |
| 174 && _intrinsics->at(index)->method() == m | |
| 175 && _intrinsics->at(index)->is_virtual() == is_virtual) { | |
| 176 return _intrinsics->at(index); | |
| 177 } | |
| 178 } | |
| 179 // Lazily create intrinsics for intrinsic IDs well-known in the runtime. | |
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180 if (m->intrinsic_id() != vmIntrinsics::_none && |
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181 m->intrinsic_id() <= vmIntrinsics::LAST_COMPILER_INLINE) { |
| 0 | 182 CallGenerator* cg = make_vm_intrinsic(m, is_virtual); |
| 183 if (cg != NULL) { | |
| 184 // Save it for next time: | |
| 185 register_intrinsic(cg); | |
| 186 return cg; | |
| 187 } else { | |
| 188 gather_intrinsic_statistics(m->intrinsic_id(), is_virtual, _intrinsic_disabled); | |
| 189 } | |
| 190 } | |
| 191 return NULL; | |
| 192 } | |
| 193 | |
| 194 // Compile:: register_library_intrinsics and make_vm_intrinsic are defined | |
| 195 // in library_call.cpp. | |
| 196 | |
| 197 | |
| 198 #ifndef PRODUCT | |
| 199 // statistics gathering... | |
| 200 | |
| 201 juint Compile::_intrinsic_hist_count[vmIntrinsics::ID_LIMIT] = {0}; | |
| 202 jubyte Compile::_intrinsic_hist_flags[vmIntrinsics::ID_LIMIT] = {0}; | |
| 203 | |
| 204 bool Compile::gather_intrinsic_statistics(vmIntrinsics::ID id, bool is_virtual, int flags) { | |
| 205 assert(id > vmIntrinsics::_none && id < vmIntrinsics::ID_LIMIT, "oob"); | |
| 206 int oflags = _intrinsic_hist_flags[id]; | |
| 207 assert(flags != 0, "what happened?"); | |
| 208 if (is_virtual) { | |
| 209 flags |= _intrinsic_virtual; | |
| 210 } | |
| 211 bool changed = (flags != oflags); | |
| 212 if ((flags & _intrinsic_worked) != 0) { | |
| 213 juint count = (_intrinsic_hist_count[id] += 1); | |
| 214 if (count == 1) { | |
| 215 changed = true; // first time | |
| 216 } | |
| 217 // increment the overall count also: | |
| 218 _intrinsic_hist_count[vmIntrinsics::_none] += 1; | |
| 219 } | |
| 220 if (changed) { | |
| 221 if (((oflags ^ flags) & _intrinsic_virtual) != 0) { | |
| 222 // Something changed about the intrinsic's virtuality. | |
| 223 if ((flags & _intrinsic_virtual) != 0) { | |
| 224 // This is the first use of this intrinsic as a virtual call. | |
| 225 if (oflags != 0) { | |
| 226 // We already saw it as a non-virtual, so note both cases. | |
| 227 flags |= _intrinsic_both; | |
| 228 } | |
| 229 } else if ((oflags & _intrinsic_both) == 0) { | |
| 230 // This is the first use of this intrinsic as a non-virtual | |
| 231 flags |= _intrinsic_both; | |
| 232 } | |
| 233 } | |
| 234 _intrinsic_hist_flags[id] = (jubyte) (oflags | flags); | |
| 235 } | |
| 236 // update the overall flags also: | |
| 237 _intrinsic_hist_flags[vmIntrinsics::_none] |= (jubyte) flags; | |
| 238 return changed; | |
| 239 } | |
| 240 | |
| 241 static char* format_flags(int flags, char* buf) { | |
| 242 buf[0] = 0; | |
| 243 if ((flags & Compile::_intrinsic_worked) != 0) strcat(buf, ",worked"); | |
| 244 if ((flags & Compile::_intrinsic_failed) != 0) strcat(buf, ",failed"); | |
| 245 if ((flags & Compile::_intrinsic_disabled) != 0) strcat(buf, ",disabled"); | |
| 246 if ((flags & Compile::_intrinsic_virtual) != 0) strcat(buf, ",virtual"); | |
| 247 if ((flags & Compile::_intrinsic_both) != 0) strcat(buf, ",nonvirtual"); | |
| 248 if (buf[0] == 0) strcat(buf, ","); | |
| 249 assert(buf[0] == ',', "must be"); | |
| 250 return &buf[1]; | |
| 251 } | |
| 252 | |
| 253 void Compile::print_intrinsic_statistics() { | |
| 254 char flagsbuf[100]; | |
| 255 ttyLocker ttyl; | |
| 256 if (xtty != NULL) xtty->head("statistics type='intrinsic'"); | |
| 257 tty->print_cr("Compiler intrinsic usage:"); | |
| 258 juint total = _intrinsic_hist_count[vmIntrinsics::_none]; | |
| 259 if (total == 0) total = 1; // avoid div0 in case of no successes | |
| 260 #define PRINT_STAT_LINE(name, c, f) \ | |
| 261 tty->print_cr(" %4d (%4.1f%%) %s (%s)", (int)(c), ((c) * 100.0) / total, name, f); | |
| 262 for (int index = 1 + (int)vmIntrinsics::_none; index < (int)vmIntrinsics::ID_LIMIT; index++) { | |
| 263 vmIntrinsics::ID id = (vmIntrinsics::ID) index; | |
| 264 int flags = _intrinsic_hist_flags[id]; | |
| 265 juint count = _intrinsic_hist_count[id]; | |
| 266 if ((flags | count) != 0) { | |
| 267 PRINT_STAT_LINE(vmIntrinsics::name_at(id), count, format_flags(flags, flagsbuf)); | |
| 268 } | |
| 269 } | |
| 270 PRINT_STAT_LINE("total", total, format_flags(_intrinsic_hist_flags[vmIntrinsics::_none], flagsbuf)); | |
| 271 if (xtty != NULL) xtty->tail("statistics"); | |
| 272 } | |
| 273 | |
| 274 void Compile::print_statistics() { | |
| 275 { ttyLocker ttyl; | |
| 276 if (xtty != NULL) xtty->head("statistics type='opto'"); | |
| 277 Parse::print_statistics(); | |
| 278 PhaseCCP::print_statistics(); | |
| 279 PhaseRegAlloc::print_statistics(); | |
| 280 Scheduling::print_statistics(); | |
| 281 PhasePeephole::print_statistics(); | |
| 282 PhaseIdealLoop::print_statistics(); | |
| 283 if (xtty != NULL) xtty->tail("statistics"); | |
| 284 } | |
| 285 if (_intrinsic_hist_flags[vmIntrinsics::_none] != 0) { | |
| 286 // put this under its own <statistics> element. | |
| 287 print_intrinsic_statistics(); | |
| 288 } | |
| 289 } | |
| 290 #endif //PRODUCT | |
| 291 | |
| 292 // Support for bundling info | |
| 293 Bundle* Compile::node_bundling(const Node *n) { | |
| 294 assert(valid_bundle_info(n), "oob"); | |
| 295 return &_node_bundling_base[n->_idx]; | |
| 296 } | |
| 297 | |
| 298 bool Compile::valid_bundle_info(const Node *n) { | |
| 299 return (_node_bundling_limit > n->_idx); | |
| 300 } | |
| 301 | |
| 302 | |
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303 void Compile::gvn_replace_by(Node* n, Node* nn) { |
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304 for (DUIterator_Last imin, i = n->last_outs(imin); i >= imin; ) { |
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305 Node* use = n->last_out(i); |
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306 bool is_in_table = initial_gvn()->hash_delete(use); |
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307 uint uses_found = 0; |
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308 for (uint j = 0; j < use->len(); j++) { |
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309 if (use->in(j) == n) { |
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310 if (j < use->req()) |
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311 use->set_req(j, nn); |
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312 else |
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313 use->set_prec(j, nn); |
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314 uses_found++; |
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315 } |
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316 } |
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317 if (is_in_table) { |
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318 // reinsert into table |
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319 initial_gvn()->hash_find_insert(use); |
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320 } |
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321 record_for_igvn(use); |
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322 i -= uses_found; // we deleted 1 or more copies of this edge |
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323 } |
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324 } |
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325 |
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326 |
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327 static inline bool not_a_node(const Node* n) { |
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328 if (n == NULL) return true; |
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329 if (((intptr_t)n & 1) != 0) return true; // uninitialized, etc. |
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330 if (*(address*)n == badAddress) return true; // kill by Node::destruct |
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331 return false; |
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332 } |
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333 |
| 0 | 334 // Identify all nodes that are reachable from below, useful. |
| 335 // Use breadth-first pass that records state in a Unique_Node_List, | |
| 336 // recursive traversal is slower. | |
| 337 void Compile::identify_useful_nodes(Unique_Node_List &useful) { | |
| 338 int estimated_worklist_size = unique(); | |
| 339 useful.map( estimated_worklist_size, NULL ); // preallocate space | |
| 340 | |
| 341 // Initialize worklist | |
| 342 if (root() != NULL) { useful.push(root()); } | |
| 343 // If 'top' is cached, declare it useful to preserve cached node | |
| 344 if( cached_top_node() ) { useful.push(cached_top_node()); } | |
| 345 | |
| 346 // Push all useful nodes onto the list, breadthfirst | |
| 347 for( uint next = 0; next < useful.size(); ++next ) { | |
| 348 assert( next < unique(), "Unique useful nodes < total nodes"); | |
| 349 Node *n = useful.at(next); | |
| 350 uint max = n->len(); | |
| 351 for( uint i = 0; i < max; ++i ) { | |
| 352 Node *m = n->in(i); | |
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353 if (not_a_node(m)) continue; |
| 0 | 354 useful.push(m); |
| 355 } | |
| 356 } | |
| 357 } | |
| 358 | |
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359 // Update dead_node_list with any missing dead nodes using useful |
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360 // list. Consider all non-useful nodes to be useless i.e., dead nodes. |
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361 void Compile::update_dead_node_list(Unique_Node_List &useful) { |
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362 uint max_idx = unique(); |
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363 VectorSet& useful_node_set = useful.member_set(); |
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364 |
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365 for (uint node_idx = 0; node_idx < max_idx; node_idx++) { |
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366 // If node with index node_idx is not in useful set, |
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367 // mark it as dead in dead node list. |
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368 if (! useful_node_set.test(node_idx) ) { |
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369 record_dead_node(node_idx); |
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370 } |
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371 } |
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372 } |
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373 |
| 7473 | 374 void Compile::remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful) { |
| 375 int shift = 0; | |
| 376 for (int i = 0; i < inlines->length(); i++) { | |
| 377 CallGenerator* cg = inlines->at(i); | |
| 378 CallNode* call = cg->call_node(); | |
| 379 if (shift > 0) { | |
| 380 inlines->at_put(i-shift, cg); | |
| 381 } | |
| 382 if (!useful.member(call)) { | |
| 383 shift++; | |
| 384 } | |
| 385 } | |
| 386 inlines->trunc_to(inlines->length()-shift); | |
| 387 } | |
| 388 | |
| 0 | 389 // Disconnect all useless nodes by disconnecting those at the boundary. |
| 390 void Compile::remove_useless_nodes(Unique_Node_List &useful) { | |
| 391 uint next = 0; | |
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392 while (next < useful.size()) { |
| 0 | 393 Node *n = useful.at(next++); |
| 394 // Use raw traversal of out edges since this code removes out edges | |
| 395 int max = n->outcnt(); | |
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396 for (int j = 0; j < max; ++j) { |
| 0 | 397 Node* child = n->raw_out(j); |
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398 if (! useful.member(child)) { |
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399 assert(!child->is_top() || child != top(), |
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400 "If top is cached in Compile object it is in useful list"); |
| 0 | 401 // Only need to remove this out-edge to the useless node |
| 402 n->raw_del_out(j); | |
| 403 --j; | |
| 404 --max; | |
| 405 } | |
| 406 } | |
| 407 if (n->outcnt() == 1 && n->has_special_unique_user()) { | |
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408 record_for_igvn(n->unique_out()); |
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409 } |
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410 } |
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411 // Remove useless macro and predicate opaq nodes |
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412 for (int i = C->macro_count()-1; i >= 0; i--) { |
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413 Node* n = C->macro_node(i); |
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414 if (!useful.member(n)) { |
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415 remove_macro_node(n); |
| 0 | 416 } |
| 417 } | |
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418 // Remove useless expensive node |
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419 for (int i = C->expensive_count()-1; i >= 0; i--) { |
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420 Node* n = C->expensive_node(i); |
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421 if (!useful.member(n)) { |
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422 remove_expensive_node(n); |
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423 } |
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424 } |
| 7473 | 425 // clean up the late inline lists |
| 426 remove_useless_late_inlines(&_string_late_inlines, useful); | |
| 10278 | 427 remove_useless_late_inlines(&_boxing_late_inlines, useful); |
| 7473 | 428 remove_useless_late_inlines(&_late_inlines, useful); |
| 0 | 429 debug_only(verify_graph_edges(true/*check for no_dead_code*/);) |
| 430 } | |
| 431 | |
| 432 //------------------------------frame_size_in_words----------------------------- | |
| 433 // frame_slots in units of words | |
| 434 int Compile::frame_size_in_words() const { | |
| 435 // shift is 0 in LP32 and 1 in LP64 | |
| 436 const int shift = (LogBytesPerWord - LogBytesPerInt); | |
| 437 int words = _frame_slots >> shift; | |
| 438 assert( words << shift == _frame_slots, "frame size must be properly aligned in LP64" ); | |
| 439 return words; | |
| 440 } | |
| 441 | |
| 442 // ============================================================================ | |
| 443 //------------------------------CompileWrapper--------------------------------- | |
| 444 class CompileWrapper : public StackObj { | |
| 445 Compile *const _compile; | |
| 446 public: | |
| 447 CompileWrapper(Compile* compile); | |
| 448 | |
| 449 ~CompileWrapper(); | |
| 450 }; | |
| 451 | |
| 452 CompileWrapper::CompileWrapper(Compile* compile) : _compile(compile) { | |
| 453 // the Compile* pointer is stored in the current ciEnv: | |
| 454 ciEnv* env = compile->env(); | |
| 455 assert(env == ciEnv::current(), "must already be a ciEnv active"); | |
| 456 assert(env->compiler_data() == NULL, "compile already active?"); | |
| 457 env->set_compiler_data(compile); | |
| 458 assert(compile == Compile::current(), "sanity"); | |
| 459 | |
| 460 compile->set_type_dict(NULL); | |
| 461 compile->set_type_hwm(NULL); | |
| 462 compile->set_type_last_size(0); | |
| 463 compile->set_last_tf(NULL, NULL); | |
| 464 compile->set_indexSet_arena(NULL); | |
| 465 compile->set_indexSet_free_block_list(NULL); | |
| 466 compile->init_type_arena(); | |
| 467 Type::Initialize(compile); | |
| 468 _compile->set_scratch_buffer_blob(NULL); | |
| 469 _compile->begin_method(); | |
| 470 } | |
| 471 CompileWrapper::~CompileWrapper() { | |
| 472 _compile->end_method(); | |
| 473 if (_compile->scratch_buffer_blob() != NULL) | |
| 474 BufferBlob::free(_compile->scratch_buffer_blob()); | |
| 475 _compile->env()->set_compiler_data(NULL); | |
| 476 } | |
| 477 | |
| 478 | |
| 479 //----------------------------print_compile_messages--------------------------- | |
| 480 void Compile::print_compile_messages() { | |
| 481 #ifndef PRODUCT | |
| 482 // Check if recompiling | |
| 483 if (_subsume_loads == false && PrintOpto) { | |
| 484 // Recompiling without allowing machine instructions to subsume loads | |
| 485 tty->print_cr("*********************************************************"); | |
| 486 tty->print_cr("** Bailout: Recompile without subsuming loads **"); | |
| 487 tty->print_cr("*********************************************************"); | |
| 488 } | |
|
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489 if (_do_escape_analysis != DoEscapeAnalysis && PrintOpto) { |
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490 // Recompiling without escape analysis |
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491 tty->print_cr("*********************************************************"); |
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492 tty->print_cr("** Bailout: Recompile without escape analysis **"); |
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493 tty->print_cr("*********************************************************"); |
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494 } |
| 10278 | 495 if (_eliminate_boxing != EliminateAutoBox && PrintOpto) { |
| 496 // Recompiling without boxing elimination | |
| 497 tty->print_cr("*********************************************************"); | |
| 498 tty->print_cr("** Bailout: Recompile without boxing elimination **"); | |
| 499 tty->print_cr("*********************************************************"); | |
| 500 } | |
| 0 | 501 if (env()->break_at_compile()) { |
| 605 | 502 // Open the debugger when compiling this method. |
| 0 | 503 tty->print("### Breaking when compiling: "); |
| 504 method()->print_short_name(); | |
| 505 tty->cr(); | |
| 506 BREAKPOINT; | |
| 507 } | |
| 508 | |
| 509 if( PrintOpto ) { | |
| 510 if (is_osr_compilation()) { | |
| 511 tty->print("[OSR]%3d", _compile_id); | |
| 512 } else { | |
| 513 tty->print("%3d", _compile_id); | |
| 514 } | |
| 515 } | |
| 516 #endif | |
| 517 } | |
| 518 | |
| 519 | |
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520 //-----------------------init_scratch_buffer_blob------------------------------ |
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521 // Construct a temporary BufferBlob and cache it for this compile. |
| 2008 | 522 void Compile::init_scratch_buffer_blob(int const_size) { |
|
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523 // If there is already a scratch buffer blob allocated and the |
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524 // constant section is big enough, use it. Otherwise free the |
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525 // current and allocate a new one. |
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526 BufferBlob* blob = scratch_buffer_blob(); |
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527 if ((blob != NULL) && (const_size <= _scratch_const_size)) { |
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528 // Use the current blob. |
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529 } else { |
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530 if (blob != NULL) { |
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531 BufferBlob::free(blob); |
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532 } |
| 0 | 533 |
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534 ResourceMark rm; |
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535 _scratch_const_size = const_size; |
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536 int size = (MAX_inst_size + MAX_stubs_size + _scratch_const_size); |
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537 blob = BufferBlob::create("Compile::scratch_buffer", size); |
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538 // Record the buffer blob for next time. |
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539 set_scratch_buffer_blob(blob); |
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540 // Have we run out of code space? |
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541 if (scratch_buffer_blob() == NULL) { |
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542 // Let CompilerBroker disable further compilations. |
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543 record_failure("Not enough space for scratch buffer in CodeCache"); |
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544 return; |
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545 } |
| 163 | 546 } |
| 0 | 547 |
| 548 // Initialize the relocation buffers | |
| 1748 | 549 relocInfo* locs_buf = (relocInfo*) blob->content_end() - MAX_locs_size; |
| 0 | 550 set_scratch_locs_memory(locs_buf); |
| 551 } | |
| 552 | |
| 553 | |
| 554 //-----------------------scratch_emit_size------------------------------------- | |
| 555 // Helper function that computes size by emitting code | |
| 556 uint Compile::scratch_emit_size(const Node* n) { | |
| 2008 | 557 // Start scratch_emit_size section. |
| 558 set_in_scratch_emit_size(true); | |
| 559 | |
| 0 | 560 // Emit into a trash buffer and count bytes emitted. |
| 561 // This is a pretty expensive way to compute a size, | |
| 562 // but it works well enough if seldom used. | |
| 563 // All common fixed-size instructions are given a size | |
| 564 // method by the AD file. | |
| 565 // Note that the scratch buffer blob and locs memory are | |
| 566 // allocated at the beginning of the compile task, and | |
| 567 // may be shared by several calls to scratch_emit_size. | |
| 568 // The allocation of the scratch buffer blob is particularly | |
| 569 // expensive, since it has to grab the code cache lock. | |
| 570 BufferBlob* blob = this->scratch_buffer_blob(); | |
| 571 assert(blob != NULL, "Initialize BufferBlob at start"); | |
| 572 assert(blob->size() > MAX_inst_size, "sanity"); | |
| 573 relocInfo* locs_buf = scratch_locs_memory(); | |
| 1748 | 574 address blob_begin = blob->content_begin(); |
| 0 | 575 address blob_end = (address)locs_buf; |
| 1748 | 576 assert(blob->content_contains(blob_end), "sanity"); |
| 0 | 577 CodeBuffer buf(blob_begin, blob_end - blob_begin); |
| 2008 | 578 buf.initialize_consts_size(_scratch_const_size); |
| 0 | 579 buf.initialize_stubs_size(MAX_stubs_size); |
| 580 assert(locs_buf != NULL, "sanity"); | |
| 2008 | 581 int lsize = MAX_locs_size / 3; |
| 582 buf.consts()->initialize_shared_locs(&locs_buf[lsize * 0], lsize); | |
| 583 buf.insts()->initialize_shared_locs( &locs_buf[lsize * 1], lsize); | |
| 584 buf.stubs()->initialize_shared_locs( &locs_buf[lsize * 2], lsize); | |
| 585 | |
| 586 // Do the emission. | |
| 3839 | 587 |
| 588 Label fakeL; // Fake label for branch instructions. | |
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589 Label* saveL = NULL; |
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590 uint save_bnum = 0; |
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591 bool is_branch = n->is_MachBranch(); |
| 3839 | 592 if (is_branch) { |
| 593 MacroAssembler masm(&buf); | |
| 594 masm.bind(fakeL); | |
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595 n->as_MachBranch()->save_label(&saveL, &save_bnum); |
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596 n->as_MachBranch()->label_set(&fakeL, 0); |
| 3839 | 597 } |
| 0 | 598 n->emit(buf, this->regalloc()); |
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599 if (is_branch) // Restore label. |
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600 n->as_MachBranch()->label_set(saveL, save_bnum); |
| 2008 | 601 |
| 602 // End scratch_emit_size section. | |
| 603 set_in_scratch_emit_size(false); | |
| 604 | |
| 1748 | 605 return buf.insts_size(); |
| 0 | 606 } |
| 607 | |
| 608 | |
| 609 // ============================================================================ | |
| 610 //------------------------------Compile standard------------------------------- | |
| 611 debug_only( int Compile::_debug_idx = 100000; ) | |
| 612 | |
| 613 // Compile a method. entry_bci is -1 for normal compilations and indicates | |
| 614 // the continuation bci for on stack replacement. | |
| 615 | |
| 616 | |
| 10278 | 617 Compile::Compile( ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, int osr_bci, |
| 618 bool subsume_loads, bool do_escape_analysis, bool eliminate_boxing ) | |
| 0 | 619 : Phase(Compiler), |
| 620 _env(ci_env), | |
| 621 _log(ci_env->log()), | |
| 622 _compile_id(ci_env->compile_id()), | |
| 623 _save_argument_registers(false), | |
| 624 _stub_name(NULL), | |
| 625 _stub_function(NULL), | |
| 626 _stub_entry_point(NULL), | |
| 627 _method(target), | |
| 628 _entry_bci(osr_bci), | |
| 629 _initial_gvn(NULL), | |
| 630 _for_igvn(NULL), | |
| 631 _warm_calls(NULL), | |
| 632 _subsume_loads(subsume_loads), | |
|
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changeset
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633 _do_escape_analysis(do_escape_analysis), |
| 10278 | 634 _eliminate_boxing(eliminate_boxing), |
| 0 | 635 _failure_reason(NULL), |
| 636 _code_buffer("Compile::Fill_buffer"), | |
| 637 _orig_pc_slot(0), | |
| 638 _orig_pc_slot_offset_in_bytes(0), | |
| 1265 | 639 _has_method_handle_invokes(false), |
| 2008 | 640 _mach_constant_base_node(NULL), |
| 0 | 641 _node_bundling_limit(0), |
| 642 _node_bundling_base(NULL), | |
|
859
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643 _java_calls(0), |
|
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644 _inner_loops(0), |
| 2008 | 645 _scratch_const_size(-1), |
| 646 _in_scratch_emit_size(false), | |
|
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647 _dead_node_list(comp_arena()), |
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648 _dead_node_count(0), |
| 0 | 649 #ifndef PRODUCT |
| 650 _trace_opto_output(TraceOptoOutput || method()->has_option("TraceOptoOutput")), | |
|
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651 _in_dump_cnt(0), |
| 0 | 652 _printer(IdealGraphPrinter::printer()), |
| 653 #endif | |
|
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654 _congraph(NULL), |
| 17622 | 655 _replay_inline_data(NULL), |
| 7473 | 656 _late_inlines(comp_arena(), 2, 0, NULL), |
| 657 _string_late_inlines(comp_arena(), 2, 0, NULL), | |
| 10278 | 658 _boxing_late_inlines(comp_arena(), 2, 0, NULL), |
| 7473 | 659 _late_inlines_pos(0), |
| 660 _number_of_mh_late_inlines(0), | |
| 661 _inlining_progress(false), | |
| 662 _inlining_incrementally(false), | |
|
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663 _print_inlining_list(NULL), |
|
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8024069: replace_in_map() should operate on parent maps
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664 _print_inlining_idx(0), |
|
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|
665 _preserve_jvm_state(0) { |
| 0 | 666 C = this; |
| 667 | |
| 668 CompileWrapper cw(this); | |
| 669 #ifndef PRODUCT | |
| 670 if (TimeCompiler2) { | |
| 671 tty->print(" "); | |
| 672 target->holder()->name()->print(); | |
| 673 tty->print("."); | |
| 674 target->print_short_name(); | |
| 675 tty->print(" "); | |
| 676 } | |
| 677 TraceTime t1("Total compilation time", &_t_totalCompilation, TimeCompiler, TimeCompiler2); | |
| 678 TraceTime t2(NULL, &_t_methodCompilation, TimeCompiler, false); | |
|
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679 bool print_opto_assembly = PrintOptoAssembly || _method->has_option("PrintOptoAssembly"); |
|
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680 if (!print_opto_assembly) { |
|
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681 bool print_assembly = (PrintAssembly || _method->should_print_assembly()); |
|
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|
682 if (print_assembly && !Disassembler::can_decode()) { |
|
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683 tty->print_cr("PrintAssembly request changed to PrintOptoAssembly"); |
|
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684 print_opto_assembly = true; |
|
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|
685 } |
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|
686 } |
|
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|
687 set_print_assembly(print_opto_assembly); |
|
367
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688 set_parsed_irreducible_loop(false); |
| 17622 | 689 |
| 690 if (method()->has_option("ReplayInline")) { | |
| 691 _replay_inline_data = ciReplay::load_inline_data(method(), entry_bci(), ci_env->comp_level()); | |
| 692 } | |
| 0 | 693 #endif |
| 12295 | 694 set_print_inlining(PrintInlining || method()->has_option("PrintInlining") NOT_PRODUCT( || PrintOptoInlining)); |
| 695 set_print_intrinsics(PrintIntrinsics || method()->has_option("PrintIntrinsics")); | |
| 0 | 696 |
| 697 if (ProfileTraps) { | |
| 698 // Make sure the method being compiled gets its own MDO, | |
| 699 // so we can at least track the decompile_count(). | |
|
2007
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7003554: (tiered) assert(is_null_object() || handle() != NULL) failed: cannot embed null pointer
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diff
changeset
|
700 method()->ensure_method_data(); |
| 0 | 701 } |
| 702 | |
| 703 Init(::AliasLevel); | |
| 704 | |
| 705 | |
| 706 print_compile_messages(); | |
| 707 | |
| 708 if (UseOldInlining || PrintCompilation NOT_PRODUCT( || PrintOpto) ) | |
| 709 _ilt = InlineTree::build_inline_tree_root(); | |
| 710 else | |
| 711 _ilt = NULL; | |
| 712 | |
| 713 // Even if NO memory addresses are used, MergeMem nodes must have at least 1 slice | |
| 714 assert(num_alias_types() >= AliasIdxRaw, ""); | |
| 715 | |
| 716 #define MINIMUM_NODE_HASH 1023 | |
| 717 // Node list that Iterative GVN will start with | |
| 718 Unique_Node_List for_igvn(comp_arena()); | |
| 719 set_for_igvn(&for_igvn); | |
| 720 | |
| 721 // GVN that will be run immediately on new nodes | |
| 722 uint estimated_size = method()->code_size()*4+64; | |
| 723 estimated_size = (estimated_size < MINIMUM_NODE_HASH ? MINIMUM_NODE_HASH : estimated_size); | |
| 724 PhaseGVN gvn(node_arena(), estimated_size); | |
| 725 set_initial_gvn(&gvn); | |
| 726 | |
| 12295 | 727 if (print_inlining() || print_intrinsics()) { |
|
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728 _print_inlining_list = new (comp_arena())GrowableArray<PrintInliningBuffer>(comp_arena(), 1, 1, PrintInliningBuffer()); |
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|
729 } |
| 0 | 730 { // Scope for timing the parser |
| 731 TracePhase t3("parse", &_t_parser, true); | |
| 732 | |
| 733 // Put top into the hash table ASAP. | |
| 734 initial_gvn()->transform_no_reclaim(top()); | |
| 735 | |
| 736 // Set up tf(), start(), and find a CallGenerator. | |
|
3249
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737 CallGenerator* cg = NULL; |
| 0 | 738 if (is_osr_compilation()) { |
| 739 const TypeTuple *domain = StartOSRNode::osr_domain(); | |
| 740 const TypeTuple *range = TypeTuple::make_range(method()->signature()); | |
| 741 init_tf(TypeFunc::make(domain, range)); | |
|
6804
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7193318: C2: remove number of inputs requirement from Node's new operator
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|
742 StartNode* s = new (this) StartOSRNode(root(), domain); |
| 0 | 743 initial_gvn()->set_type_bottom(s); |
| 744 init_start(s); | |
| 745 cg = CallGenerator::for_osr(method(), entry_bci()); | |
| 746 } else { | |
| 747 // Normal case. | |
| 748 init_tf(TypeFunc::make(method())); | |
|
6804
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diff
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|
749 StartNode* s = new (this) StartNode(root(), tf()->domain()); |
| 0 | 750 initial_gvn()->set_type_bottom(s); |
| 751 init_start(s); | |
|
3249
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7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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parents:
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diff
changeset
|
752 if (method()->intrinsic_id() == vmIntrinsics::_Reference_get && UseG1GC) { |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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753 // With java.lang.ref.reference.get() we must go through the |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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diff
changeset
|
754 // intrinsic when G1 is enabled - even when get() is the root |
|
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7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
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3248
diff
changeset
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755 // method of the compile - so that, if necessary, the value in |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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changeset
|
756 // the referent field of the reference object gets recorded by |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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diff
changeset
|
757 // the pre-barrier code. |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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diff
changeset
|
758 // Specifically, if G1 is enabled, the value in the referent |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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changeset
|
759 // field is recorded by the G1 SATB pre barrier. This will |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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diff
changeset
|
760 // result in the referent being marked live and the reference |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
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changeset
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761 // object removed from the list of discovered references during |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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762 // reference processing. |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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changeset
|
763 cg = find_intrinsic(method(), false); |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
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diff
changeset
|
764 } |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
johnc
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diff
changeset
|
765 if (cg == NULL) { |
|
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7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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diff
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|
766 float past_uses = method()->interpreter_invocation_count(); |
|
e1162778c1c8
7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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|
767 float expected_uses = past_uses; |
|
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7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
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diff
changeset
|
768 cg = CallGenerator::for_inline(method(), expected_uses); |
|
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diff
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|
769 } |
| 0 | 770 } |
| 771 if (failing()) return; | |
| 772 if (cg == NULL) { | |
| 773 record_method_not_compilable_all_tiers("cannot parse method"); | |
| 774 return; | |
| 775 } | |
| 776 JVMState* jvms = build_start_state(start(), tf()); | |
|
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changeset
|
777 if ((jvms = cg->generate(jvms, NULL)) == NULL) { |
| 0 | 778 record_method_not_compilable("method parse failed"); |
| 779 return; | |
| 780 } | |
| 781 GraphKit kit(jvms); | |
| 782 | |
| 783 if (!kit.stopped()) { | |
| 784 // Accept return values, and transfer control we know not where. | |
| 785 // This is done by a special, unique ReturnNode bound to root. | |
| 786 return_values(kit.jvms()); | |
| 787 } | |
| 788 | |
| 789 if (kit.has_exceptions()) { | |
| 790 // Any exceptions that escape from this call must be rethrown | |
| 791 // to whatever caller is dynamically above us on the stack. | |
| 792 // This is done by a special, unique RethrowNode bound to root. | |
| 793 rethrow_exceptions(kit.transfer_exceptions_into_jvms()); | |
| 794 } | |
| 795 | |
| 7473 | 796 assert(IncrementalInline || (_late_inlines.length() == 0 && !has_mh_late_inlines()), "incremental inlining is off"); |
| 797 | |
| 798 if (_late_inlines.length() == 0 && !has_mh_late_inlines() && !failing() && has_stringbuilder()) { | |
| 799 inline_string_calls(true); | |
|
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
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929
diff
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|
800 } |
| 7473 | 801 |
| 802 if (failing()) return; | |
|
1080
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6892658: C2 should optimize some stringbuilder patterns
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diff
changeset
|
803 |
| 10405 | 804 print_method(PHASE_BEFORE_REMOVEUSELESS, 3); |
|
367
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6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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diff
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|
805 |
| 0 | 806 // Remove clutter produced by parsing. |
| 807 if (!failing()) { | |
| 808 ResourceMark rm; | |
| 809 PhaseRemoveUseless pru(initial_gvn(), &for_igvn); | |
| 810 } | |
| 811 } | |
| 812 | |
| 813 // Note: Large methods are capped off in do_one_bytecode(). | |
| 814 if (failing()) return; | |
| 815 | |
| 816 // After parsing, node notes are no longer automagic. | |
| 817 // They must be propagated by register_new_node_with_optimizer(), | |
| 818 // clone(), or the like. | |
| 819 set_default_node_notes(NULL); | |
| 820 | |
| 821 for (;;) { | |
| 822 int successes = Inline_Warm(); | |
| 823 if (failing()) return; | |
| 824 if (successes == 0) break; | |
| 825 } | |
| 826 | |
| 827 // Drain the list. | |
| 828 Finish_Warm(); | |
| 829 #ifndef PRODUCT | |
| 830 if (_printer) { | |
| 831 _printer->print_inlining(this); | |
| 832 } | |
| 833 #endif | |
| 834 | |
| 835 if (failing()) return; | |
| 836 NOT_PRODUCT( verify_graph_edges(); ) | |
| 837 | |
| 838 // Now optimize | |
| 839 Optimize(); | |
| 840 if (failing()) return; | |
| 841 NOT_PRODUCT( verify_graph_edges(); ) | |
| 842 | |
| 843 #ifndef PRODUCT | |
| 844 if (PrintIdeal) { | |
| 845 ttyLocker ttyl; // keep the following output all in one block | |
| 846 // This output goes directly to the tty, not the compiler log. | |
| 847 // To enable tools to match it up with the compilation activity, | |
| 848 // be sure to tag this tty output with the compile ID. | |
| 849 if (xtty != NULL) { | |
| 850 xtty->head("ideal compile_id='%d'%s", compile_id(), | |
| 851 is_osr_compilation() ? " compile_kind='osr'" : | |
| 852 ""); | |
| 853 } | |
| 854 root()->dump(9999); | |
| 855 if (xtty != NULL) { | |
| 856 xtty->tail("ideal"); | |
| 857 } | |
| 858 } | |
| 859 #endif | |
| 860 | |
|
13045
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8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
861 NOT_PRODUCT( verify_barriers(); ) |
| 17622 | 862 |
| 863 // Dump compilation data to replay it. | |
| 864 if (method()->has_option("DumpReplay")) { | |
| 865 env()->dump_replay_data(_compile_id); | |
| 866 } | |
| 867 if (method()->has_option("DumpInline") && (ilt() != NULL)) { | |
| 868 env()->dump_inline_data(_compile_id); | |
| 869 } | |
| 870 | |
| 0 | 871 // Now that we know the size of all the monitors we can add a fixed slot |
| 872 // for the original deopt pc. | |
| 873 | |
| 874 _orig_pc_slot = fixed_slots(); | |
| 875 int next_slot = _orig_pc_slot + (sizeof(address) / VMRegImpl::stack_slot_size); | |
| 876 set_fixed_slots(next_slot); | |
| 877 | |
|
14440
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
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14438
diff
changeset
|
878 // Compute when to use implicit null checks. Used by matching trap based |
|
41b780b43b74
8029015: PPC64 (part 216): opto: trap based null and range checks
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changeset
|
879 // nodes and NullCheck optimization. |
|
41b780b43b74
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|
880 set_allowed_deopt_reasons(); |
|
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|
881 |
| 0 | 882 // Now generate code |
| 883 Code_Gen(); | |
| 884 if (failing()) return; | |
| 885 | |
| 886 // Check if we want to skip execution of all compiled code. | |
| 887 { | |
| 888 #ifndef PRODUCT | |
| 889 if (OptoNoExecute) { | |
| 890 record_method_not_compilable("+OptoNoExecute"); // Flag as failed | |
| 891 return; | |
| 892 } | |
| 893 TracePhase t2("install_code", &_t_registerMethod, TimeCompiler); | |
| 894 #endif | |
| 895 | |
| 896 if (is_osr_compilation()) { | |
| 897 _code_offsets.set_value(CodeOffsets::Verified_Entry, 0); | |
| 898 _code_offsets.set_value(CodeOffsets::OSR_Entry, _first_block_size); | |
| 899 } else { | |
| 900 _code_offsets.set_value(CodeOffsets::Verified_Entry, _first_block_size); | |
| 901 _code_offsets.set_value(CodeOffsets::OSR_Entry, 0); | |
| 902 } | |
| 903 | |
| 904 env()->register_method(_method, _entry_bci, | |
| 905 &_code_offsets, | |
| 906 _orig_pc_slot_offset_in_bytes, | |
| 907 code_buffer(), | |
| 908 frame_size_in_words(), _oop_map_set, | |
| 909 &_handler_table, &_inc_table, | |
| 910 compiler, | |
| 911 env()->comp_level(), | |
|
6792
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7196199: java/text/Bidi/Bug6665028.java failed: Bidi run count incorrect
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changeset
|
912 has_unsafe_access(), |
|
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7196199: java/text/Bidi/Bug6665028.java failed: Bidi run count incorrect
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|
913 SharedRuntime::is_wide_vector(max_vector_size()) |
| 0 | 914 ); |
| 6843 | 915 |
| 916 if (log() != NULL) // Print code cache state into compiler log | |
| 917 log()->code_cache_state(); | |
| 0 | 918 } |
| 919 } | |
| 920 | |
| 921 //------------------------------Compile---------------------------------------- | |
| 922 // Compile a runtime stub | |
| 923 Compile::Compile( ciEnv* ci_env, | |
| 924 TypeFunc_generator generator, | |
| 925 address stub_function, | |
| 926 const char *stub_name, | |
| 927 int is_fancy_jump, | |
| 928 bool pass_tls, | |
| 929 bool save_arg_registers, | |
| 930 bool return_pc ) | |
| 931 : Phase(Compiler), | |
| 932 _env(ci_env), | |
| 933 _log(ci_env->log()), | |
|
8730
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8005772: Stubs report compile id -1 in phase events
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8694
diff
changeset
|
934 _compile_id(0), |
| 0 | 935 _save_argument_registers(save_arg_registers), |
| 936 _method(NULL), | |
| 937 _stub_name(stub_name), | |
| 938 _stub_function(stub_function), | |
| 939 _stub_entry_point(NULL), | |
| 940 _entry_bci(InvocationEntryBci), | |
| 941 _initial_gvn(NULL), | |
| 942 _for_igvn(NULL), | |
| 943 _warm_calls(NULL), | |
| 944 _orig_pc_slot(0), | |
| 945 _orig_pc_slot_offset_in_bytes(0), | |
| 946 _subsume_loads(true), | |
|
38
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diff
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947 _do_escape_analysis(false), |
| 10278 | 948 _eliminate_boxing(false), |
| 0 | 949 _failure_reason(NULL), |
| 950 _code_buffer("Compile::Fill_buffer"), | |
| 1265 | 951 _has_method_handle_invokes(false), |
| 2008 | 952 _mach_constant_base_node(NULL), |
| 0 | 953 _node_bundling_limit(0), |
| 954 _node_bundling_base(NULL), | |
|
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955 _java_calls(0), |
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956 _inner_loops(0), |
| 0 | 957 #ifndef PRODUCT |
| 958 _trace_opto_output(TraceOptoOutput), | |
|
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959 _in_dump_cnt(0), |
| 0 | 960 _printer(NULL), |
| 961 #endif | |
|
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962 _dead_node_list(comp_arena()), |
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963 _dead_node_count(0), |
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964 _congraph(NULL), |
| 17622 | 965 _replay_inline_data(NULL), |
| 7473 | 966 _number_of_mh_late_inlines(0), |
| 967 _inlining_progress(false), | |
| 968 _inlining_incrementally(false), | |
|
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969 _print_inlining_list(NULL), |
|
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970 _print_inlining_idx(0), |
|
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971 _preserve_jvm_state(0), |
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972 _allowed_reasons(0) { |
| 0 | 973 C = this; |
| 974 | |
| 975 #ifndef PRODUCT | |
| 976 TraceTime t1(NULL, &_t_totalCompilation, TimeCompiler, false); | |
| 977 TraceTime t2(NULL, &_t_stubCompilation, TimeCompiler, false); | |
| 978 set_print_assembly(PrintFrameConverterAssembly); | |
|
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979 set_parsed_irreducible_loop(false); |
| 0 | 980 #endif |
| 981 CompileWrapper cw(this); | |
| 982 Init(/*AliasLevel=*/ 0); | |
| 983 init_tf((*generator)()); | |
| 984 | |
| 985 { | |
| 986 // The following is a dummy for the sake of GraphKit::gen_stub | |
| 987 Unique_Node_List for_igvn(comp_arena()); | |
| 988 set_for_igvn(&for_igvn); // not used, but some GraphKit guys push on this | |
| 989 PhaseGVN gvn(Thread::current()->resource_area(),255); | |
| 990 set_initial_gvn(&gvn); // not significant, but GraphKit guys use it pervasively | |
| 991 gvn.transform_no_reclaim(top()); | |
| 992 | |
| 993 GraphKit kit; | |
| 994 kit.gen_stub(stub_function, stub_name, is_fancy_jump, pass_tls, return_pc); | |
| 995 } | |
| 996 | |
| 997 NOT_PRODUCT( verify_graph_edges(); ) | |
| 998 Code_Gen(); | |
| 999 if (failing()) return; | |
| 1000 | |
| 1001 | |
| 1002 // Entry point will be accessed using compile->stub_entry_point(); | |
| 1003 if (code_buffer() == NULL) { | |
| 1004 Matcher::soft_match_failure(); | |
| 1005 } else { | |
| 1006 if (PrintAssembly && (WizardMode || Verbose)) | |
| 1007 tty->print_cr("### Stub::%s", stub_name); | |
| 1008 | |
| 1009 if (!failing()) { | |
| 1010 assert(_fixed_slots == 0, "no fixed slots used for runtime stubs"); | |
| 1011 | |
| 1012 // Make the NMethod | |
| 1013 // For now we mark the frame as never safe for profile stackwalking | |
| 1014 RuntimeStub *rs = RuntimeStub::new_runtime_stub(stub_name, | |
| 1015 code_buffer(), | |
| 1016 CodeOffsets::frame_never_safe, | |
| 1017 // _code_offsets.value(CodeOffsets::Frame_Complete), | |
| 1018 frame_size_in_words(), | |
| 1019 _oop_map_set, | |
| 1020 save_arg_registers); | |
| 1021 assert(rs != NULL && rs->is_runtime_stub(), "sanity check"); | |
| 1022 | |
| 1023 _stub_entry_point = rs->entry_point(); | |
| 1024 } | |
| 1025 } | |
| 1026 } | |
| 1027 | |
| 1028 //------------------------------Init------------------------------------------- | |
| 1029 // Prepare for a single compilation | |
| 1030 void Compile::Init(int aliaslevel) { | |
| 1031 _unique = 0; | |
| 1032 _regalloc = NULL; | |
| 1033 | |
| 1034 _tf = NULL; // filled in later | |
| 1035 _top = NULL; // cached later | |
| 1036 _matcher = NULL; // filled in later | |
| 1037 _cfg = NULL; // filled in later | |
| 1038 | |
| 1039 set_24_bit_selection_and_mode(Use24BitFP, false); | |
| 1040 | |
| 1041 _node_note_array = NULL; | |
| 1042 _default_node_notes = NULL; | |
| 1043 | |
| 1044 _immutable_memory = NULL; // filled in at first inquiry | |
| 1045 | |
| 1046 // Globally visible Nodes | |
| 1047 // First set TOP to NULL to give safe behavior during creation of RootNode | |
| 1048 set_cached_top_node(NULL); | |
|
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1049 set_root(new (this) RootNode()); |
| 0 | 1050 // Now that you have a Root to point to, create the real TOP |
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1051 set_cached_top_node( new (this) ConNode(Type::TOP) ); |
| 0 | 1052 set_recent_alloc(NULL, NULL); |
| 1053 | |
| 1054 // Create Debug Information Recorder to record scopes, oopmaps, etc. | |
|
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1055 env()->set_oop_recorder(new OopRecorder(env()->arena())); |
| 0 | 1056 env()->set_debug_info(new DebugInformationRecorder(env()->oop_recorder())); |
| 1057 env()->set_dependencies(new Dependencies(env())); | |
| 1058 | |
| 1059 _fixed_slots = 0; | |
| 1060 set_has_split_ifs(false); | |
| 1061 set_has_loops(has_method() && method()->has_loops()); // first approximation | |
|
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1062 set_has_stringbuilder(false); |
| 10278 | 1063 set_has_boxed_value(false); |
| 0 | 1064 _trap_can_recompile = false; // no traps emitted yet |
| 1065 _major_progress = true; // start out assuming good things will happen | |
| 1066 set_has_unsafe_access(false); | |
|
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1067 set_max_vector_size(0); |
| 0 | 1068 Copy::zero_to_bytes(_trap_hist, sizeof(_trap_hist)); |
| 1069 set_decompile_count(0); | |
| 1070 | |
| 418 | 1071 set_do_freq_based_layout(BlockLayoutByFrequency || method_has_option("BlockLayoutByFrequency")); |
| 1783 | 1072 set_num_loop_opts(LoopOptsCount); |
| 1073 set_do_inlining(Inline); | |
| 1074 set_max_inline_size(MaxInlineSize); | |
| 1075 set_freq_inline_size(FreqInlineSize); | |
| 1076 set_do_scheduling(OptoScheduling); | |
| 1077 set_do_count_invocations(false); | |
| 1078 set_do_method_data_update(false); | |
| 0 | 1079 |
| 1080 if (debug_info()->recording_non_safepoints()) { | |
| 1081 set_node_note_array(new(comp_arena()) GrowableArray<Node_Notes*> | |
| 1082 (comp_arena(), 8, 0, NULL)); | |
| 1083 set_default_node_notes(Node_Notes::make(this)); | |
| 1084 } | |
| 1085 | |
| 1086 // // -- Initialize types before each compile -- | |
| 1087 // // Update cached type information | |
| 1088 // if( _method && _method->constants() ) | |
| 1089 // Type::update_loaded_types(_method, _method->constants()); | |
| 1090 | |
| 1091 // Init alias_type map. | |
|
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1092 if (!_do_escape_analysis && aliaslevel == 3) |
| 0 | 1093 aliaslevel = 2; // No unique types without escape analysis |
| 1094 _AliasLevel = aliaslevel; | |
| 1095 const int grow_ats = 16; | |
| 1096 _max_alias_types = grow_ats; | |
| 1097 _alias_types = NEW_ARENA_ARRAY(comp_arena(), AliasType*, grow_ats); | |
| 1098 AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, grow_ats); | |
| 1099 Copy::zero_to_bytes(ats, sizeof(AliasType)*grow_ats); | |
| 1100 { | |
| 1101 for (int i = 0; i < grow_ats; i++) _alias_types[i] = &ats[i]; | |
| 1102 } | |
| 1103 // Initialize the first few types. | |
| 1104 _alias_types[AliasIdxTop]->Init(AliasIdxTop, NULL); | |
| 1105 _alias_types[AliasIdxBot]->Init(AliasIdxBot, TypePtr::BOTTOM); | |
| 1106 _alias_types[AliasIdxRaw]->Init(AliasIdxRaw, TypeRawPtr::BOTTOM); | |
| 1107 _num_alias_types = AliasIdxRaw+1; | |
| 1108 // Zero out the alias type cache. | |
| 1109 Copy::zero_to_bytes(_alias_cache, sizeof(_alias_cache)); | |
| 1110 // A NULL adr_type hits in the cache right away. Preload the right answer. | |
| 1111 probe_alias_cache(NULL)->_index = AliasIdxTop; | |
| 1112 | |
| 1113 _intrinsics = NULL; | |
| 1685 | 1114 _macro_nodes = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); |
| 1115 _predicate_opaqs = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); | |
|
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1116 _expensive_nodes = new(comp_arena()) GrowableArray<Node*>(comp_arena(), 8, 0, NULL); |
| 0 | 1117 register_library_intrinsics(); |
| 1118 } | |
| 1119 | |
| 1120 //---------------------------init_start---------------------------------------- | |
| 1121 // Install the StartNode on this compile object. | |
| 1122 void Compile::init_start(StartNode* s) { | |
| 1123 if (failing()) | |
| 1124 return; // already failing | |
| 1125 assert(s == start(), ""); | |
| 1126 } | |
| 1127 | |
| 1128 StartNode* Compile::start() const { | |
| 1129 assert(!failing(), ""); | |
| 1130 for (DUIterator_Fast imax, i = root()->fast_outs(imax); i < imax; i++) { | |
| 1131 Node* start = root()->fast_out(i); | |
| 1132 if( start->is_Start() ) | |
| 1133 return start->as_Start(); | |
| 1134 } | |
| 1135 ShouldNotReachHere(); | |
| 1136 return NULL; | |
| 1137 } | |
| 1138 | |
| 1139 //-------------------------------immutable_memory------------------------------------- | |
| 1140 // Access immutable memory | |
| 1141 Node* Compile::immutable_memory() { | |
| 1142 if (_immutable_memory != NULL) { | |
| 1143 return _immutable_memory; | |
| 1144 } | |
| 1145 StartNode* s = start(); | |
| 1146 for (DUIterator_Fast imax, i = s->fast_outs(imax); true; i++) { | |
| 1147 Node *p = s->fast_out(i); | |
| 1148 if (p != s && p->as_Proj()->_con == TypeFunc::Memory) { | |
| 1149 _immutable_memory = p; | |
| 1150 return _immutable_memory; | |
| 1151 } | |
| 1152 } | |
| 1153 ShouldNotReachHere(); | |
| 1154 return NULL; | |
| 1155 } | |
| 1156 | |
| 1157 //----------------------set_cached_top_node------------------------------------ | |
| 1158 // Install the cached top node, and make sure Node::is_top works correctly. | |
| 1159 void Compile::set_cached_top_node(Node* tn) { | |
| 1160 if (tn != NULL) verify_top(tn); | |
| 1161 Node* old_top = _top; | |
| 1162 _top = tn; | |
| 1163 // Calling Node::setup_is_top allows the nodes the chance to adjust | |
| 1164 // their _out arrays. | |
| 1165 if (_top != NULL) _top->setup_is_top(); | |
| 1166 if (old_top != NULL) old_top->setup_is_top(); | |
| 1167 assert(_top == NULL || top()->is_top(), ""); | |
| 1168 } | |
| 1169 | |
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1170 #ifdef ASSERT |
|
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1171 uint Compile::count_live_nodes_by_graph_walk() { |
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1172 Unique_Node_List useful(comp_arena()); |
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1173 // Get useful node list by walking the graph. |
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1174 identify_useful_nodes(useful); |
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1175 return useful.size(); |
|
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1176 } |
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1177 |
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1178 void Compile::print_missing_nodes() { |
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1179 |
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1180 // Return if CompileLog is NULL and PrintIdealNodeCount is false. |
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1181 if ((_log == NULL) && (! PrintIdealNodeCount)) { |
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1182 return; |
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1183 } |
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1184 |
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1185 // This is an expensive function. It is executed only when the user |
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1186 // specifies VerifyIdealNodeCount option or otherwise knows the |
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1187 // additional work that needs to be done to identify reachable nodes |
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1188 // by walking the flow graph and find the missing ones using |
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1189 // _dead_node_list. |
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1190 |
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1191 Unique_Node_List useful(comp_arena()); |
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1192 // Get useful node list by walking the graph. |
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1193 identify_useful_nodes(useful); |
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1194 |
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1195 uint l_nodes = C->live_nodes(); |
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1196 uint l_nodes_by_walk = useful.size(); |
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1197 |
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1198 if (l_nodes != l_nodes_by_walk) { |
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1199 if (_log != NULL) { |
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1200 _log->begin_head("mismatched_nodes count='%d'", abs((int) (l_nodes - l_nodes_by_walk))); |
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1201 _log->stamp(); |
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1202 _log->end_head(); |
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1203 } |
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1204 VectorSet& useful_member_set = useful.member_set(); |
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1205 int last_idx = l_nodes_by_walk; |
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1206 for (int i = 0; i < last_idx; i++) { |
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1207 if (useful_member_set.test(i)) { |
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1208 if (_dead_node_list.test(i)) { |
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1209 if (_log != NULL) { |
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1210 _log->elem("mismatched_node_info node_idx='%d' type='both live and dead'", i); |
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1211 } |
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1212 if (PrintIdealNodeCount) { |
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1213 // Print the log message to tty |
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1214 tty->print_cr("mismatched_node idx='%d' both live and dead'", i); |
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1215 useful.at(i)->dump(); |
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1216 } |
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1217 } |
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1218 } |
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1219 else if (! _dead_node_list.test(i)) { |
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1220 if (_log != NULL) { |
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1221 _log->elem("mismatched_node_info node_idx='%d' type='neither live nor dead'", i); |
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1222 } |
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1223 if (PrintIdealNodeCount) { |
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1224 // Print the log message to tty |
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1225 tty->print_cr("mismatched_node idx='%d' type='neither live nor dead'", i); |
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1226 } |
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1227 } |
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1228 } |
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1229 if (_log != NULL) { |
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1230 _log->tail("mismatched_nodes"); |
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1231 } |
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1232 } |
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1233 } |
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1234 #endif |
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1235 |
| 0 | 1236 #ifndef PRODUCT |
| 1237 void Compile::verify_top(Node* tn) const { | |
| 1238 if (tn != NULL) { | |
| 1239 assert(tn->is_Con(), "top node must be a constant"); | |
| 1240 assert(((ConNode*)tn)->type() == Type::TOP, "top node must have correct type"); | |
| 1241 assert(tn->in(0) != NULL, "must have live top node"); | |
| 1242 } | |
| 1243 } | |
| 1244 #endif | |
| 1245 | |
| 1246 | |
| 1247 ///-------------------Managing Per-Node Debug & Profile Info------------------- | |
| 1248 | |
| 1249 void Compile::grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by) { | |
| 1250 guarantee(arr != NULL, ""); | |
| 1251 int num_blocks = arr->length(); | |
| 1252 if (grow_by < num_blocks) grow_by = num_blocks; | |
| 1253 int num_notes = grow_by * _node_notes_block_size; | |
| 1254 Node_Notes* notes = NEW_ARENA_ARRAY(node_arena(), Node_Notes, num_notes); | |
| 1255 Copy::zero_to_bytes(notes, num_notes * sizeof(Node_Notes)); | |
| 1256 while (num_notes > 0) { | |
| 1257 arr->append(notes); | |
| 1258 notes += _node_notes_block_size; | |
| 1259 num_notes -= _node_notes_block_size; | |
| 1260 } | |
| 1261 assert(num_notes == 0, "exact multiple, please"); | |
| 1262 } | |
| 1263 | |
| 1264 bool Compile::copy_node_notes_to(Node* dest, Node* source) { | |
| 1265 if (source == NULL || dest == NULL) return false; | |
| 1266 | |
| 1267 if (dest->is_Con()) | |
| 1268 return false; // Do not push debug info onto constants. | |
| 1269 | |
| 1270 #ifdef ASSERT | |
| 1271 // Leave a bread crumb trail pointing to the original node: | |
| 1272 if (dest != NULL && dest != source && dest->debug_orig() == NULL) { | |
| 1273 dest->set_debug_orig(source); | |
| 1274 } | |
| 1275 #endif | |
| 1276 | |
| 1277 if (node_note_array() == NULL) | |
| 1278 return false; // Not collecting any notes now. | |
| 1279 | |
| 1280 // This is a copy onto a pre-existing node, which may already have notes. | |
| 1281 // If both nodes have notes, do not overwrite any pre-existing notes. | |
| 1282 Node_Notes* source_notes = node_notes_at(source->_idx); | |
| 1283 if (source_notes == NULL || source_notes->is_clear()) return false; | |
| 1284 Node_Notes* dest_notes = node_notes_at(dest->_idx); | |
| 1285 if (dest_notes == NULL || dest_notes->is_clear()) { | |
| 1286 return set_node_notes_at(dest->_idx, source_notes); | |
| 1287 } | |
| 1288 | |
| 1289 Node_Notes merged_notes = (*source_notes); | |
| 1290 // The order of operations here ensures that dest notes will win... | |
| 1291 merged_notes.update_from(dest_notes); | |
| 1292 return set_node_notes_at(dest->_idx, &merged_notes); | |
| 1293 } | |
| 1294 | |
| 1295 | |
| 1296 //--------------------------allow_range_check_smearing------------------------- | |
| 1297 // Gating condition for coalescing similar range checks. | |
| 1298 // Sometimes we try 'speculatively' replacing a series of a range checks by a | |
| 1299 // single covering check that is at least as strong as any of them. | |
| 1300 // If the optimization succeeds, the simplified (strengthened) range check | |
| 1301 // will always succeed. If it fails, we will deopt, and then give up | |
| 1302 // on the optimization. | |
| 1303 bool Compile::allow_range_check_smearing() const { | |
| 1304 // If this method has already thrown a range-check, | |
| 1305 // assume it was because we already tried range smearing | |
| 1306 // and it failed. | |
| 1307 uint already_trapped = trap_count(Deoptimization::Reason_range_check); | |
| 1308 return !already_trapped; | |
| 1309 } | |
| 1310 | |
| 1311 | |
| 1312 //------------------------------flatten_alias_type----------------------------- | |
| 1313 const TypePtr *Compile::flatten_alias_type( const TypePtr *tj ) const { | |
| 1314 int offset = tj->offset(); | |
| 1315 TypePtr::PTR ptr = tj->ptr(); | |
| 1316 | |
| 247 | 1317 // Known instance (scalarizable allocation) alias only with itself. |
| 1318 bool is_known_inst = tj->isa_oopptr() != NULL && | |
| 1319 tj->is_oopptr()->is_known_instance(); | |
| 1320 | |
| 0 | 1321 // Process weird unsafe references. |
| 1322 if (offset == Type::OffsetBot && (tj->isa_instptr() /*|| tj->isa_klassptr()*/)) { | |
| 1323 assert(InlineUnsafeOps, "indeterminate pointers come only from unsafe ops"); | |
| 247 | 1324 assert(!is_known_inst, "scalarizable allocation should not have unsafe references"); |
| 0 | 1325 tj = TypeOopPtr::BOTTOM; |
| 1326 ptr = tj->ptr(); | |
| 1327 offset = tj->offset(); | |
| 1328 } | |
| 1329 | |
| 1330 // Array pointers need some flattening | |
| 1331 const TypeAryPtr *ta = tj->isa_aryptr(); | |
|
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1332 if (ta && ta->is_stable()) { |
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1333 // Erase stability property for alias analysis. |
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1334 tj = ta = ta->cast_to_stable(false); |
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1335 } |
| 247 | 1336 if( ta && is_known_inst ) { |
| 1337 if ( offset != Type::OffsetBot && | |
| 1338 offset > arrayOopDesc::length_offset_in_bytes() ) { | |
| 1339 offset = Type::OffsetBot; // Flatten constant access into array body only | |
| 1340 tj = ta = TypeAryPtr::make(ptr, ta->ary(), ta->klass(), true, offset, ta->instance_id()); | |
| 1341 } | |
| 1342 } else if( ta && _AliasLevel >= 2 ) { | |
| 0 | 1343 // For arrays indexed by constant indices, we flatten the alias |
| 1344 // space to include all of the array body. Only the header, klass | |
| 1345 // and array length can be accessed un-aliased. | |
| 1346 if( offset != Type::OffsetBot ) { | |
|
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1347 if( ta->const_oop() ) { // MethodData* or Method* |
| 0 | 1348 offset = Type::OffsetBot; // Flatten constant access into array body |
| 247 | 1349 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),ta->ary(),ta->klass(),false,offset); |
| 0 | 1350 } else if( offset == arrayOopDesc::length_offset_in_bytes() ) { |
| 1351 // range is OK as-is. | |
| 1352 tj = ta = TypeAryPtr::RANGE; | |
| 1353 } else if( offset == oopDesc::klass_offset_in_bytes() ) { | |
| 1354 tj = TypeInstPtr::KLASS; // all klass loads look alike | |
| 1355 ta = TypeAryPtr::RANGE; // generic ignored junk | |
| 1356 ptr = TypePtr::BotPTR; | |
| 1357 } else if( offset == oopDesc::mark_offset_in_bytes() ) { | |
| 1358 tj = TypeInstPtr::MARK; | |
| 1359 ta = TypeAryPtr::RANGE; // generic ignored junk | |
| 1360 ptr = TypePtr::BotPTR; | |
| 1361 } else { // Random constant offset into array body | |
| 1362 offset = Type::OffsetBot; // Flatten constant access into array body | |
| 247 | 1363 tj = ta = TypeAryPtr::make(ptr,ta->ary(),ta->klass(),false,offset); |
| 0 | 1364 } |
| 1365 } | |
| 1366 // Arrays of fixed size alias with arrays of unknown size. | |
| 1367 if (ta->size() != TypeInt::POS) { | |
| 1368 const TypeAry *tary = TypeAry::make(ta->elem(), TypeInt::POS); | |
| 247 | 1369 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,ta->klass(),false,offset); |
| 0 | 1370 } |
| 1371 // Arrays of known objects become arrays of unknown objects. | |
|
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1372 if (ta->elem()->isa_narrowoop() && ta->elem() != TypeNarrowOop::BOTTOM) { |
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1373 const TypeAry *tary = TypeAry::make(TypeNarrowOop::BOTTOM, ta->size()); |
| 247 | 1374 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset); |
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1375 } |
| 0 | 1376 if (ta->elem()->isa_oopptr() && ta->elem() != TypeInstPtr::BOTTOM) { |
| 1377 const TypeAry *tary = TypeAry::make(TypeInstPtr::BOTTOM, ta->size()); | |
| 247 | 1378 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset); |
| 0 | 1379 } |
| 1380 // Arrays of bytes and of booleans both use 'bastore' and 'baload' so | |
| 1381 // cannot be distinguished by bytecode alone. | |
| 1382 if (ta->elem() == TypeInt::BOOL) { | |
| 1383 const TypeAry *tary = TypeAry::make(TypeInt::BYTE, ta->size()); | |
| 1384 ciKlass* aklass = ciTypeArrayKlass::make(T_BYTE); | |
| 247 | 1385 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,aklass,false,offset); |
| 0 | 1386 } |
| 1387 // During the 2nd round of IterGVN, NotNull castings are removed. | |
| 1388 // Make sure the Bottom and NotNull variants alias the same. | |
| 1389 // Also, make sure exact and non-exact variants alias the same. | |
| 12966 | 1390 if (ptr == TypePtr::NotNull || ta->klass_is_exact() || ta->speculative() != NULL) { |
| 3789 | 1391 tj = ta = TypeAryPtr::make(TypePtr::BotPTR,ta->ary(),ta->klass(),false,offset); |
| 0 | 1392 } |
| 1393 } | |
| 1394 | |
| 1395 // Oop pointers need some flattening | |
| 1396 const TypeInstPtr *to = tj->isa_instptr(); | |
| 1397 if( to && _AliasLevel >= 2 && to != TypeOopPtr::BOTTOM ) { | |
|
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1398 ciInstanceKlass *k = to->klass()->as_instance_klass(); |
| 0 | 1399 if( ptr == TypePtr::Constant ) { |
|
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1400 if (to->klass() != ciEnv::current()->Class_klass() || |
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1401 offset < k->size_helper() * wordSize) { |
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1402 // No constant oop pointers (such as Strings); they alias with |
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1403 // unknown strings. |
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1404 assert(!is_known_inst, "not scalarizable allocation"); |
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1405 tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset); |
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1406 } |
| 247 | 1407 } else if( is_known_inst ) { |
| 163 | 1408 tj = to; // Keep NotNull and klass_is_exact for instance type |
| 0 | 1409 } else if( ptr == TypePtr::NotNull || to->klass_is_exact() ) { |
| 1410 // During the 2nd round of IterGVN, NotNull castings are removed. | |
| 1411 // Make sure the Bottom and NotNull variants alias the same. | |
| 1412 // Also, make sure exact and non-exact variants alias the same. | |
| 247 | 1413 tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset); |
| 0 | 1414 } |
| 12966 | 1415 if (to->speculative() != NULL) { |
| 1416 tj = to = TypeInstPtr::make(to->ptr(),to->klass(),to->klass_is_exact(),to->const_oop(),to->offset(), to->instance_id()); | |
| 1417 } | |
| 0 | 1418 // Canonicalize the holder of this field |
|
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1419 if (offset >= 0 && offset < instanceOopDesc::base_offset_in_bytes()) { |
| 0 | 1420 // First handle header references such as a LoadKlassNode, even if the |
| 1421 // object's klass is unloaded at compile time (4965979). | |
| 247 | 1422 if (!is_known_inst) { // Do it only for non-instance types |
| 1423 tj = to = TypeInstPtr::make(TypePtr::BotPTR, env()->Object_klass(), false, NULL, offset); | |
| 1424 } | |
| 0 | 1425 } else if (offset < 0 || offset >= k->size_helper() * wordSize) { |
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1426 // Static fields are in the space above the normal instance |
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1427 // fields in the java.lang.Class instance. |
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1428 if (to->klass() != ciEnv::current()->Class_klass()) { |
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1429 to = NULL; |
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1430 tj = TypeOopPtr::BOTTOM; |
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1431 offset = tj->offset(); |
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1432 } |
| 0 | 1433 } else { |
| 1434 ciInstanceKlass *canonical_holder = k->get_canonical_holder(offset); | |
| 1435 if (!k->equals(canonical_holder) || tj->offset() != offset) { | |
| 247 | 1436 if( is_known_inst ) { |
| 1437 tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, true, NULL, offset, to->instance_id()); | |
| 1438 } else { | |
| 1439 tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, false, NULL, offset); | |
| 1440 } | |
| 0 | 1441 } |
| 1442 } | |
| 1443 } | |
| 1444 | |
| 1445 // Klass pointers to object array klasses need some flattening | |
| 1446 const TypeKlassPtr *tk = tj->isa_klassptr(); | |
| 1447 if( tk ) { | |
| 1448 // If we are referencing a field within a Klass, we need | |
| 1449 // to assume the worst case of an Object. Both exact and | |
|
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1450 // inexact types must flatten to the same alias class so |
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1451 // use NotNull as the PTR. |
| 0 | 1452 if ( offset == Type::OffsetBot || (offset >= 0 && (size_t)offset < sizeof(Klass)) ) { |
| 1453 | |
|
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1454 tj = tk = TypeKlassPtr::make(TypePtr::NotNull, |
| 0 | 1455 TypeKlassPtr::OBJECT->klass(), |
| 1456 offset); | |
| 1457 } | |
| 1458 | |
| 1459 ciKlass* klass = tk->klass(); | |
| 1460 if( klass->is_obj_array_klass() ) { | |
| 1461 ciKlass* k = TypeAryPtr::OOPS->klass(); | |
| 1462 if( !k || !k->is_loaded() ) // Only fails for some -Xcomp runs | |
| 1463 k = TypeInstPtr::BOTTOM->klass(); | |
| 1464 tj = tk = TypeKlassPtr::make( TypePtr::NotNull, k, offset ); | |
| 1465 } | |
| 1466 | |
| 1467 // Check for precise loads from the primary supertype array and force them | |
| 1468 // to the supertype cache alias index. Check for generic array loads from | |
| 1469 // the primary supertype array and also force them to the supertype cache | |
| 1470 // alias index. Since the same load can reach both, we need to merge | |
| 1471 // these 2 disparate memories into the same alias class. Since the | |
| 1472 // primary supertype array is read-only, there's no chance of confusion | |
| 1473 // where we bypass an array load and an array store. | |
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1474 int primary_supers_offset = in_bytes(Klass::primary_supers_offset()); |
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1475 if (offset == Type::OffsetBot || |
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1476 (offset >= primary_supers_offset && |
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1477 offset < (int)(primary_supers_offset + Klass::primary_super_limit() * wordSize)) || |
|
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1478 offset == (int)in_bytes(Klass::secondary_super_cache_offset())) { |
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1479 offset = in_bytes(Klass::secondary_super_cache_offset()); |
| 0 | 1480 tj = tk = TypeKlassPtr::make( TypePtr::NotNull, tk->klass(), offset ); |
| 1481 } | |
| 1482 } | |
| 1483 | |
| 1484 // Flatten all Raw pointers together. | |
| 1485 if (tj->base() == Type::RawPtr) | |
| 1486 tj = TypeRawPtr::BOTTOM; | |
| 1487 | |
| 1488 if (tj->base() == Type::AnyPtr) | |
| 1489 tj = TypePtr::BOTTOM; // An error, which the caller must check for. | |
| 1490 | |
| 1491 // Flatten all to bottom for now | |
| 1492 switch( _AliasLevel ) { | |
| 1493 case 0: | |
| 1494 tj = TypePtr::BOTTOM; | |
| 1495 break; | |
| 1496 case 1: // Flatten to: oop, static, field or array | |
| 1497 switch (tj->base()) { | |
| 1498 //case Type::AryPtr: tj = TypeAryPtr::RANGE; break; | |
| 1499 case Type::RawPtr: tj = TypeRawPtr::BOTTOM; break; | |
| 1500 case Type::AryPtr: // do not distinguish arrays at all | |
| 1501 case Type::InstPtr: tj = TypeInstPtr::BOTTOM; break; | |
| 1502 case Type::KlassPtr: tj = TypeKlassPtr::OBJECT; break; | |
| 1503 case Type::AnyPtr: tj = TypePtr::BOTTOM; break; // caller checks it | |
| 1504 default: ShouldNotReachHere(); | |
| 1505 } | |
| 1506 break; | |
| 605 | 1507 case 2: // No collapsing at level 2; keep all splits |
| 1508 case 3: // No collapsing at level 3; keep all splits | |
| 0 | 1509 break; |
| 1510 default: | |
| 1511 Unimplemented(); | |
| 1512 } | |
| 1513 | |
| 1514 offset = tj->offset(); | |
| 1515 assert( offset != Type::OffsetTop, "Offset has fallen from constant" ); | |
| 1516 | |
| 1517 assert( (offset != Type::OffsetBot && tj->base() != Type::AryPtr) || | |
| 1518 (offset == Type::OffsetBot && tj->base() == Type::AryPtr) || | |
| 1519 (offset == Type::OffsetBot && tj == TypeOopPtr::BOTTOM) || | |
| 1520 (offset == Type::OffsetBot && tj == TypePtr::BOTTOM) || | |
| 1521 (offset == oopDesc::mark_offset_in_bytes() && tj->base() == Type::AryPtr) || | |
| 1522 (offset == oopDesc::klass_offset_in_bytes() && tj->base() == Type::AryPtr) || | |
| 1523 (offset == arrayOopDesc::length_offset_in_bytes() && tj->base() == Type::AryPtr) , | |
| 1524 "For oops, klasses, raw offset must be constant; for arrays the offset is never known" ); | |
| 1525 assert( tj->ptr() != TypePtr::TopPTR && | |
| 1526 tj->ptr() != TypePtr::AnyNull && | |
| 1527 tj->ptr() != TypePtr::Null, "No imprecise addresses" ); | |
| 1528 // assert( tj->ptr() != TypePtr::Constant || | |
| 1529 // tj->base() == Type::RawPtr || | |
| 1530 // tj->base() == Type::KlassPtr, "No constant oop addresses" ); | |
| 1531 | |
| 1532 return tj; | |
| 1533 } | |
| 1534 | |
| 1535 void Compile::AliasType::Init(int i, const TypePtr* at) { | |
| 1536 _index = i; | |
| 1537 _adr_type = at; | |
| 1538 _field = NULL; | |
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1539 _element = NULL; |
| 0 | 1540 _is_rewritable = true; // default |
| 1541 const TypeOopPtr *atoop = (at != NULL) ? at->isa_oopptr() : NULL; | |
| 223 | 1542 if (atoop != NULL && atoop->is_known_instance()) { |
| 1543 const TypeOopPtr *gt = atoop->cast_to_instance_id(TypeOopPtr::InstanceBot); | |
| 0 | 1544 _general_index = Compile::current()->get_alias_index(gt); |
| 1545 } else { | |
| 1546 _general_index = 0; | |
| 1547 } | |
| 1548 } | |
| 1549 | |
| 1550 //---------------------------------print_on------------------------------------ | |
| 1551 #ifndef PRODUCT | |
| 1552 void Compile::AliasType::print_on(outputStream* st) { | |
| 1553 if (index() < 10) | |
| 1554 st->print("@ <%d> ", index()); | |
| 1555 else st->print("@ <%d>", index()); | |
| 1556 st->print(is_rewritable() ? " " : " RO"); | |
| 1557 int offset = adr_type()->offset(); | |
| 1558 if (offset == Type::OffsetBot) | |
| 1559 st->print(" +any"); | |
| 1560 else st->print(" +%-3d", offset); | |
| 1561 st->print(" in "); | |
| 1562 adr_type()->dump_on(st); | |
| 1563 const TypeOopPtr* tjp = adr_type()->isa_oopptr(); | |
| 1564 if (field() != NULL && tjp) { | |
| 1565 if (tjp->klass() != field()->holder() || | |
| 1566 tjp->offset() != field()->offset_in_bytes()) { | |
| 1567 st->print(" != "); | |
| 1568 field()->print(); | |
| 1569 st->print(" ***"); | |
| 1570 } | |
| 1571 } | |
| 1572 } | |
| 1573 | |
| 1574 void print_alias_types() { | |
| 1575 Compile* C = Compile::current(); | |
| 1576 tty->print_cr("--- Alias types, AliasIdxBot .. %d", C->num_alias_types()-1); | |
| 1577 for (int idx = Compile::AliasIdxBot; idx < C->num_alias_types(); idx++) { | |
| 1578 C->alias_type(idx)->print_on(tty); | |
| 1579 tty->cr(); | |
| 1580 } | |
| 1581 } | |
| 1582 #endif | |
| 1583 | |
| 1584 | |
| 1585 //----------------------------probe_alias_cache-------------------------------- | |
| 1586 Compile::AliasCacheEntry* Compile::probe_alias_cache(const TypePtr* adr_type) { | |
| 1587 intptr_t key = (intptr_t) adr_type; | |
| 1588 key ^= key >> logAliasCacheSize; | |
| 1589 return &_alias_cache[key & right_n_bits(logAliasCacheSize)]; | |
| 1590 } | |
| 1591 | |
| 1592 | |
| 1593 //-----------------------------grow_alias_types-------------------------------- | |
| 1594 void Compile::grow_alias_types() { | |
| 1595 const int old_ats = _max_alias_types; // how many before? | |
| 1596 const int new_ats = old_ats; // how many more? | |
| 1597 const int grow_ats = old_ats+new_ats; // how many now? | |
| 1598 _max_alias_types = grow_ats; | |
| 1599 _alias_types = REALLOC_ARENA_ARRAY(comp_arena(), AliasType*, _alias_types, old_ats, grow_ats); | |
| 1600 AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, new_ats); | |
| 1601 Copy::zero_to_bytes(ats, sizeof(AliasType)*new_ats); | |
| 1602 for (int i = 0; i < new_ats; i++) _alias_types[old_ats+i] = &ats[i]; | |
| 1603 } | |
| 1604 | |
| 1605 | |
| 1606 //--------------------------------find_alias_type------------------------------ | |
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1607 Compile::AliasType* Compile::find_alias_type(const TypePtr* adr_type, bool no_create, ciField* original_field) { |
| 0 | 1608 if (_AliasLevel == 0) |
| 1609 return alias_type(AliasIdxBot); | |
| 1610 | |
| 1611 AliasCacheEntry* ace = probe_alias_cache(adr_type); | |
| 1612 if (ace->_adr_type == adr_type) { | |
| 1613 return alias_type(ace->_index); | |
| 1614 } | |
| 1615 | |
| 1616 // Handle special cases. | |
| 1617 if (adr_type == NULL) return alias_type(AliasIdxTop); | |
| 1618 if (adr_type == TypePtr::BOTTOM) return alias_type(AliasIdxBot); | |
| 1619 | |
| 1620 // Do it the slow way. | |
| 1621 const TypePtr* flat = flatten_alias_type(adr_type); | |
| 1622 | |
| 1623 #ifdef ASSERT | |
| 1624 assert(flat == flatten_alias_type(flat), "idempotent"); | |
| 1625 assert(flat != TypePtr::BOTTOM, "cannot alias-analyze an untyped ptr"); | |
| 1626 if (flat->isa_oopptr() && !flat->isa_klassptr()) { | |
| 1627 const TypeOopPtr* foop = flat->is_oopptr(); | |
| 247 | 1628 // Scalarizable allocations have exact klass always. |
| 1629 bool exact = !foop->klass_is_exact() || foop->is_known_instance(); | |
| 1630 const TypePtr* xoop = foop->cast_to_exactness(exact)->is_ptr(); | |
| 0 | 1631 assert(foop == flatten_alias_type(xoop), "exactness must not affect alias type"); |
| 1632 } | |
| 1633 assert(flat == flatten_alias_type(flat), "exact bit doesn't matter"); | |
| 1634 #endif | |
| 1635 | |
| 1636 int idx = AliasIdxTop; | |
| 1637 for (int i = 0; i < num_alias_types(); i++) { | |
| 1638 if (alias_type(i)->adr_type() == flat) { | |
| 1639 idx = i; | |
| 1640 break; | |
| 1641 } | |
| 1642 } | |
| 1643 | |
| 1644 if (idx == AliasIdxTop) { | |
| 1645 if (no_create) return NULL; | |
| 1646 // Grow the array if necessary. | |
| 1647 if (_num_alias_types == _max_alias_types) grow_alias_types(); | |
| 1648 // Add a new alias type. | |
| 1649 idx = _num_alias_types++; | |
| 1650 _alias_types[idx]->Init(idx, flat); | |
| 1651 if (flat == TypeInstPtr::KLASS) alias_type(idx)->set_rewritable(false); | |
| 1652 if (flat == TypeAryPtr::RANGE) alias_type(idx)->set_rewritable(false); | |
| 1653 if (flat->isa_instptr()) { | |
| 1654 if (flat->offset() == java_lang_Class::klass_offset_in_bytes() | |
| 1655 && flat->is_instptr()->klass() == env()->Class_klass()) | |
| 1656 alias_type(idx)->set_rewritable(false); | |
| 1657 } | |
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1658 if (flat->isa_aryptr()) { |
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1659 #ifdef ASSERT |
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1660 const int header_size_min = arrayOopDesc::base_offset_in_bytes(T_BYTE); |
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1661 // (T_BYTE has the weakest alignment and size restrictions...) |
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1662 assert(flat->offset() < header_size_min, "array body reference must be OffsetBot"); |
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1663 #endif |
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1664 if (flat->offset() == TypePtr::OffsetBot) { |
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1665 alias_type(idx)->set_element(flat->is_aryptr()->elem()); |
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1666 } |
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1667 } |
| 0 | 1668 if (flat->isa_klassptr()) { |
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1669 if (flat->offset() == in_bytes(Klass::super_check_offset_offset())) |
| 0 | 1670 alias_type(idx)->set_rewritable(false); |
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1671 if (flat->offset() == in_bytes(Klass::modifier_flags_offset())) |
| 0 | 1672 alias_type(idx)->set_rewritable(false); |
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1673 if (flat->offset() == in_bytes(Klass::access_flags_offset())) |
| 0 | 1674 alias_type(idx)->set_rewritable(false); |
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1675 if (flat->offset() == in_bytes(Klass::java_mirror_offset())) |
| 0 | 1676 alias_type(idx)->set_rewritable(false); |
| 1677 } | |
| 1678 // %%% (We would like to finalize JavaThread::threadObj_offset(), | |
| 1679 // but the base pointer type is not distinctive enough to identify | |
| 1680 // references into JavaThread.) | |
| 1681 | |
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1682 // Check for final fields. |
| 0 | 1683 const TypeInstPtr* tinst = flat->isa_instptr(); |
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1684 if (tinst && tinst->offset() >= instanceOopDesc::base_offset_in_bytes()) { |
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1685 ciField* field; |
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1686 if (tinst->const_oop() != NULL && |
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1687 tinst->klass() == ciEnv::current()->Class_klass() && |
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1688 tinst->offset() >= (tinst->klass()->as_instance_klass()->size_helper() * wordSize)) { |
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1689 // static field |
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1690 ciInstanceKlass* k = tinst->const_oop()->as_instance()->java_lang_Class_klass()->as_instance_klass(); |
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1691 field = k->get_field_by_offset(tinst->offset(), true); |
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1692 } else { |
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1693 ciInstanceKlass *k = tinst->klass()->as_instance_klass(); |
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1694 field = k->get_field_by_offset(tinst->offset(), false); |
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1695 } |
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1696 assert(field == NULL || |
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1697 original_field == NULL || |
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1698 (field->holder() == original_field->holder() && |
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1699 field->offset() == original_field->offset() && |
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1700 field->is_static() == original_field->is_static()), "wrong field?"); |
| 0 | 1701 // Set field() and is_rewritable() attributes. |
| 1702 if (field != NULL) alias_type(idx)->set_field(field); | |
| 1703 } | |
| 1704 } | |
| 1705 | |
| 1706 // Fill the cache for next time. | |
| 1707 ace->_adr_type = adr_type; | |
| 1708 ace->_index = idx; | |
| 1709 assert(alias_type(adr_type) == alias_type(idx), "type must be installed"); | |
| 1710 | |
| 1711 // Might as well try to fill the cache for the flattened version, too. | |
| 1712 AliasCacheEntry* face = probe_alias_cache(flat); | |
| 1713 if (face->_adr_type == NULL) { | |
| 1714 face->_adr_type = flat; | |
| 1715 face->_index = idx; | |
| 1716 assert(alias_type(flat) == alias_type(idx), "flat type must work too"); | |
| 1717 } | |
| 1718 | |
| 1719 return alias_type(idx); | |
| 1720 } | |
| 1721 | |
| 1722 | |
| 1723 Compile::AliasType* Compile::alias_type(ciField* field) { | |
| 1724 const TypeOopPtr* t; | |
| 1725 if (field->is_static()) | |
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1726 t = TypeInstPtr::make(field->holder()->java_mirror()); |
| 0 | 1727 else |
| 1728 t = TypeOopPtr::make_from_klass_raw(field->holder()); | |
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1729 AliasType* atp = alias_type(t->add_offset(field->offset_in_bytes()), field); |
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1730 assert((field->is_final() || field->is_stable()) == !atp->is_rewritable(), "must get the rewritable bits correct"); |
| 0 | 1731 return atp; |
| 1732 } | |
| 1733 | |
| 1734 | |
| 1735 //------------------------------have_alias_type-------------------------------- | |
| 1736 bool Compile::have_alias_type(const TypePtr* adr_type) { | |
| 1737 AliasCacheEntry* ace = probe_alias_cache(adr_type); | |
| 1738 if (ace->_adr_type == adr_type) { | |
| 1739 return true; | |
| 1740 } | |
| 1741 | |
| 1742 // Handle special cases. | |
| 1743 if (adr_type == NULL) return true; | |
| 1744 if (adr_type == TypePtr::BOTTOM) return true; | |
| 1745 | |
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1746 return find_alias_type(adr_type, true, NULL) != NULL; |
| 0 | 1747 } |
| 1748 | |
| 1749 //-----------------------------must_alias-------------------------------------- | |
| 1750 // True if all values of the given address type are in the given alias category. | |
| 1751 bool Compile::must_alias(const TypePtr* adr_type, int alias_idx) { | |
| 1752 if (alias_idx == AliasIdxBot) return true; // the universal category | |
| 1753 if (adr_type == NULL) return true; // NULL serves as TypePtr::TOP | |
| 1754 if (alias_idx == AliasIdxTop) return false; // the empty category | |
| 1755 if (adr_type->base() == Type::AnyPtr) return false; // TypePtr::BOTTOM or its twins | |
| 1756 | |
| 1757 // the only remaining possible overlap is identity | |
| 1758 int adr_idx = get_alias_index(adr_type); | |
| 1759 assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, ""); | |
| 1760 assert(adr_idx == alias_idx || | |
| 1761 (alias_type(alias_idx)->adr_type() != TypeOopPtr::BOTTOM | |
| 1762 && adr_type != TypeOopPtr::BOTTOM), | |
| 1763 "should not be testing for overlap with an unsafe pointer"); | |
| 1764 return adr_idx == alias_idx; | |
| 1765 } | |
| 1766 | |
| 1767 //------------------------------can_alias-------------------------------------- | |
| 1768 // True if any values of the given address type are in the given alias category. | |
| 1769 bool Compile::can_alias(const TypePtr* adr_type, int alias_idx) { | |
| 1770 if (alias_idx == AliasIdxTop) return false; // the empty category | |
| 1771 if (adr_type == NULL) return false; // NULL serves as TypePtr::TOP | |
| 1772 if (alias_idx == AliasIdxBot) return true; // the universal category | |
| 1773 if (adr_type->base() == Type::AnyPtr) return true; // TypePtr::BOTTOM or its twins | |
| 1774 | |
| 1775 // the only remaining possible overlap is identity | |
| 1776 int adr_idx = get_alias_index(adr_type); | |
| 1777 assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, ""); | |
| 1778 return adr_idx == alias_idx; | |
| 1779 } | |
| 1780 | |
| 1781 | |
| 1782 | |
| 1783 //---------------------------pop_warm_call------------------------------------- | |
| 1784 WarmCallInfo* Compile::pop_warm_call() { | |
| 1785 WarmCallInfo* wci = _warm_calls; | |
| 1786 if (wci != NULL) _warm_calls = wci->remove_from(wci); | |
| 1787 return wci; | |
| 1788 } | |
| 1789 | |
| 1790 //----------------------------Inline_Warm-------------------------------------- | |
| 1791 int Compile::Inline_Warm() { | |
| 1792 // If there is room, try to inline some more warm call sites. | |
| 1793 // %%% Do a graph index compaction pass when we think we're out of space? | |
| 1794 if (!InlineWarmCalls) return 0; | |
| 1795 | |
| 1796 int calls_made_hot = 0; | |
| 1797 int room_to_grow = NodeCountInliningCutoff - unique(); | |
| 1798 int amount_to_grow = MIN2(room_to_grow, (int)NodeCountInliningStep); | |
| 1799 int amount_grown = 0; | |
| 1800 WarmCallInfo* call; | |
| 1801 while (amount_to_grow > 0 && (call = pop_warm_call()) != NULL) { | |
| 1802 int est_size = (int)call->size(); | |
| 1803 if (est_size > (room_to_grow - amount_grown)) { | |
| 1804 // This one won't fit anyway. Get rid of it. | |
| 1805 call->make_cold(); | |
| 1806 continue; | |
| 1807 } | |
| 1808 call->make_hot(); | |
| 1809 calls_made_hot++; | |
| 1810 amount_grown += est_size; | |
| 1811 amount_to_grow -= est_size; | |
| 1812 } | |
| 1813 | |
| 1814 if (calls_made_hot > 0) set_major_progress(); | |
| 1815 return calls_made_hot; | |
| 1816 } | |
| 1817 | |
| 1818 | |
| 1819 //----------------------------Finish_Warm-------------------------------------- | |
| 1820 void Compile::Finish_Warm() { | |
| 1821 if (!InlineWarmCalls) return; | |
| 1822 if (failing()) return; | |
| 1823 if (warm_calls() == NULL) return; | |
| 1824 | |
| 1825 // Clean up loose ends, if we are out of space for inlining. | |
| 1826 WarmCallInfo* call; | |
| 1827 while ((call = pop_warm_call()) != NULL) { | |
| 1828 call->make_cold(); | |
| 1829 } | |
| 1830 } | |
| 1831 | |
| 1172 | 1832 //---------------------cleanup_loop_predicates----------------------- |
| 1833 // Remove the opaque nodes that protect the predicates so that all unused | |
| 1834 // checks and uncommon_traps will be eliminated from the ideal graph | |
| 1835 void Compile::cleanup_loop_predicates(PhaseIterGVN &igvn) { | |
| 1836 if (predicate_count()==0) return; | |
| 1837 for (int i = predicate_count(); i > 0; i--) { | |
| 1838 Node * n = predicate_opaque1_node(i-1); | |
| 1839 assert(n->Opcode() == Op_Opaque1, "must be"); | |
| 1840 igvn.replace_node(n, n->in(1)); | |
| 1841 } | |
| 1842 assert(predicate_count()==0, "should be clean!"); | |
| 1843 } | |
| 0 | 1844 |
| 7473 | 1845 // StringOpts and late inlining of string methods |
| 1846 void Compile::inline_string_calls(bool parse_time) { | |
| 1847 { | |
| 1848 // remove useless nodes to make the usage analysis simpler | |
| 1849 ResourceMark rm; | |
| 1850 PhaseRemoveUseless pru(initial_gvn(), for_igvn()); | |
| 1851 } | |
| 1852 | |
| 1853 { | |
| 1854 ResourceMark rm; | |
| 10405 | 1855 print_method(PHASE_BEFORE_STRINGOPTS, 3); |
| 7473 | 1856 PhaseStringOpts pso(initial_gvn(), for_igvn()); |
| 10405 | 1857 print_method(PHASE_AFTER_STRINGOPTS, 3); |
| 7473 | 1858 } |
| 1859 | |
| 1860 // now inline anything that we skipped the first time around | |
| 1861 if (!parse_time) { | |
| 1862 _late_inlines_pos = _late_inlines.length(); | |
| 1863 } | |
| 1864 | |
| 1865 while (_string_late_inlines.length() > 0) { | |
| 1866 CallGenerator* cg = _string_late_inlines.pop(); | |
| 1867 cg->do_late_inline(); | |
| 1868 if (failing()) return; | |
| 1869 } | |
| 1870 _string_late_inlines.trunc_to(0); | |
| 1871 } | |
| 1872 | |
| 10278 | 1873 // Late inlining of boxing methods |
| 1874 void Compile::inline_boxing_calls(PhaseIterGVN& igvn) { | |
| 1875 if (_boxing_late_inlines.length() > 0) { | |
| 1876 assert(has_boxed_value(), "inconsistent"); | |
| 1877 | |
| 1878 PhaseGVN* gvn = initial_gvn(); | |
| 1879 set_inlining_incrementally(true); | |
| 1880 | |
| 1881 assert( igvn._worklist.size() == 0, "should be done with igvn" ); | |
| 1882 for_igvn()->clear(); | |
| 1883 gvn->replace_with(&igvn); | |
| 1884 | |
| 1885 while (_boxing_late_inlines.length() > 0) { | |
| 1886 CallGenerator* cg = _boxing_late_inlines.pop(); | |
| 1887 cg->do_late_inline(); | |
| 1888 if (failing()) return; | |
| 1889 } | |
| 1890 _boxing_late_inlines.trunc_to(0); | |
| 1891 | |
| 1892 { | |
| 1893 ResourceMark rm; | |
| 1894 PhaseRemoveUseless pru(gvn, for_igvn()); | |
| 1895 } | |
| 1896 | |
| 1897 igvn = PhaseIterGVN(gvn); | |
| 1898 igvn.optimize(); | |
| 1899 | |
| 1900 set_inlining_progress(false); | |
| 1901 set_inlining_incrementally(false); | |
| 1902 } | |
| 1903 } | |
| 1904 | |
| 7473 | 1905 void Compile::inline_incrementally_one(PhaseIterGVN& igvn) { |
| 1906 assert(IncrementalInline, "incremental inlining should be on"); | |
| 1907 PhaseGVN* gvn = initial_gvn(); | |
| 1908 | |
| 1909 set_inlining_progress(false); | |
| 1910 for_igvn()->clear(); | |
| 1911 gvn->replace_with(&igvn); | |
| 1912 | |
| 1913 int i = 0; | |
| 1914 | |
| 1915 for (; i <_late_inlines.length() && !inlining_progress(); i++) { | |
| 1916 CallGenerator* cg = _late_inlines.at(i); | |
| 1917 _late_inlines_pos = i+1; | |
| 1918 cg->do_late_inline(); | |
| 1919 if (failing()) return; | |
| 1920 } | |
| 1921 int j = 0; | |
| 1922 for (; i < _late_inlines.length(); i++, j++) { | |
| 1923 _late_inlines.at_put(j, _late_inlines.at(i)); | |
| 1924 } | |
| 1925 _late_inlines.trunc_to(j); | |
| 1926 | |
| 1927 { | |
| 1928 ResourceMark rm; | |
| 10278 | 1929 PhaseRemoveUseless pru(gvn, for_igvn()); |
| 7473 | 1930 } |
| 1931 | |
| 1932 igvn = PhaseIterGVN(gvn); | |
| 1933 } | |
| 1934 | |
| 1935 // Perform incremental inlining until bound on number of live nodes is reached | |
| 1936 void Compile::inline_incrementally(PhaseIterGVN& igvn) { | |
| 1937 PhaseGVN* gvn = initial_gvn(); | |
| 1938 | |
| 1939 set_inlining_incrementally(true); | |
| 1940 set_inlining_progress(true); | |
| 1941 uint low_live_nodes = 0; | |
| 1942 | |
| 1943 while(inlining_progress() && _late_inlines.length() > 0) { | |
| 1944 | |
| 1945 if (live_nodes() > (uint)LiveNodeCountInliningCutoff) { | |
| 1946 if (low_live_nodes < (uint)LiveNodeCountInliningCutoff * 8 / 10) { | |
| 1947 // PhaseIdealLoop is expensive so we only try it once we are | |
| 1948 // out of loop and we only try it again if the previous helped | |
| 1949 // got the number of nodes down significantly | |
| 1950 PhaseIdealLoop ideal_loop( igvn, false, true ); | |
| 1951 if (failing()) return; | |
| 1952 low_live_nodes = live_nodes(); | |
| 1953 _major_progress = true; | |
| 1954 } | |
| 1955 | |
| 1956 if (live_nodes() > (uint)LiveNodeCountInliningCutoff) { | |
| 1957 break; | |
| 1958 } | |
| 1959 } | |
| 1960 | |
| 1961 inline_incrementally_one(igvn); | |
| 1962 | |
| 1963 if (failing()) return; | |
| 1964 | |
| 1965 igvn.optimize(); | |
| 1966 | |
| 1967 if (failing()) return; | |
| 1968 } | |
| 1969 | |
| 1970 assert( igvn._worklist.size() == 0, "should be done with igvn" ); | |
| 1971 | |
| 1972 if (_string_late_inlines.length() > 0) { | |
| 1973 assert(has_stringbuilder(), "inconsistent"); | |
| 1974 for_igvn()->clear(); | |
| 1975 initial_gvn()->replace_with(&igvn); | |
| 1976 | |
| 1977 inline_string_calls(false); | |
| 1978 | |
| 1979 if (failing()) return; | |
| 1980 | |
| 1981 { | |
| 1982 ResourceMark rm; | |
| 1983 PhaseRemoveUseless pru(initial_gvn(), for_igvn()); | |
| 1984 } | |
| 1985 | |
| 1986 igvn = PhaseIterGVN(gvn); | |
| 1987 | |
| 1988 igvn.optimize(); | |
| 1989 } | |
| 1990 | |
| 1991 set_inlining_incrementally(false); | |
| 1992 } | |
| 1993 | |
| 1994 | |
| 0 | 1995 //------------------------------Optimize--------------------------------------- |
| 1996 // Given a graph, optimize it. | |
| 1997 void Compile::Optimize() { | |
| 1998 TracePhase t1("optimizer", &_t_optimizer, true); | |
| 1999 | |
| 2000 #ifndef PRODUCT | |
| 2001 if (env()->break_at_compile()) { | |
| 2002 BREAKPOINT; | |
| 2003 } | |
| 2004 | |
| 2005 #endif | |
| 2006 | |
| 2007 ResourceMark rm; | |
| 2008 int loop_opts_cnt; | |
| 2009 | |
| 2010 NOT_PRODUCT( verify_graph_edges(); ) | |
| 2011 | |
| 10405 | 2012 print_method(PHASE_AFTER_PARSING); |
| 0 | 2013 |
| 2014 { | |
| 2015 // Iterative Global Value Numbering, including ideal transforms | |
| 2016 // Initialize IterGVN with types and values from parse-time GVN | |
| 2017 PhaseIterGVN igvn(initial_gvn()); | |
| 2018 { | |
| 2019 NOT_PRODUCT( TracePhase t2("iterGVN", &_t_iterGVN, TimeCompiler); ) | |
| 2020 igvn.optimize(); | |
| 2021 } | |
| 2022 | |
| 10405 | 2023 print_method(PHASE_ITER_GVN1, 2); |
| 0 | 2024 |
| 2025 if (failing()) return; | |
| 2026 | |
| 10278 | 2027 { |
| 2028 NOT_PRODUCT( TracePhase t2("incrementalInline", &_t_incrInline, TimeCompiler); ) | |
| 2029 inline_incrementally(igvn); | |
| 2030 } | |
| 7473 | 2031 |
| 10405 | 2032 print_method(PHASE_INCREMENTAL_INLINE, 2); |
| 7473 | 2033 |
| 2034 if (failing()) return; | |
| 2035 | |
| 10278 | 2036 if (eliminate_boxing()) { |
| 2037 NOT_PRODUCT( TracePhase t2("incrementalInline", &_t_incrInline, TimeCompiler); ) | |
| 2038 // Inline valueOf() methods now. | |
| 2039 inline_boxing_calls(igvn); | |
| 2040 | |
| 10405 | 2041 print_method(PHASE_INCREMENTAL_BOXING_INLINE, 2); |
| 10278 | 2042 |
| 2043 if (failing()) return; | |
| 2044 } | |
| 2045 | |
| 12966 | 2046 // Remove the speculative part of types and clean up the graph from |
| 2047 // the extra CastPP nodes whose only purpose is to carry them. Do | |
| 2048 // that early so that optimizations are not disrupted by the extra | |
| 2049 // CastPP nodes. | |
| 2050 remove_speculative_types(igvn); | |
| 2051 | |
|
8048
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7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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7605
diff
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|
2052 // No more new expensive nodes will be added to the list from here |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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|
2053 // so keep only the actual candidates for optimizations. |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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diff
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|
2054 cleanup_expensive_nodes(igvn); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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7605
diff
changeset
|
2055 |
|
1634
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
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1609
diff
changeset
|
2056 // Perform escape analysis |
|
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
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diff
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|
2057 if (_do_escape_analysis && ConnectionGraph::has_candidates(this)) { |
|
4064
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
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diff
changeset
|
2058 if (has_loops()) { |
|
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
kvn
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diff
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|
2059 // Cleanup graph (remove dead nodes). |
|
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
kvn
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diff
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|
2060 TracePhase t2("idealLoop", &_t_idealLoop, true); |
|
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
kvn
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diff
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|
2061 PhaseIdealLoop ideal_loop( igvn, false, true ); |
| 10405 | 2062 if (major_progress()) print_method(PHASE_PHASEIDEAL_BEFORE_EA, 2); |
|
4064
670a74b863fc
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diff
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|
2063 if (failing()) return; |
|
670a74b863fc
7107042: assert(no_dead_loop) failed: dead loop detected
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|
2064 } |
|
1634
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
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|
2065 ConnectionGraph::do_analysis(this, &igvn); |
|
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
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diff
changeset
|
2066 |
|
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2067 if (failing()) return; |
|
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2068 |
| 4115 | 2069 // Optimize out fields loads from scalar replaceable allocations. |
|
1634
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
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diff
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|
2070 igvn.optimize(); |
| 10405 | 2071 print_method(PHASE_ITER_GVN_AFTER_EA, 2); |
|
1634
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
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diff
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|
2072 |
|
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2073 if (failing()) return; |
|
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2074 |
| 4115 | 2075 if (congraph() != NULL && macro_count() > 0) { |
|
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
4767
diff
changeset
|
2076 NOT_PRODUCT( TracePhase t2("macroEliminate", &_t_macroEliminate, TimeCompiler); ) |
| 4115 | 2077 PhaseMacroExpand mexp(igvn); |
| 2078 mexp.eliminate_macro_nodes(); | |
| 2079 igvn.set_delay_transform(false); | |
| 2080 | |
| 2081 igvn.optimize(); | |
| 10405 | 2082 print_method(PHASE_ITER_GVN_AFTER_ELIMINATION, 2); |
| 4115 | 2083 |
| 2084 if (failing()) return; | |
| 2085 } | |
|
1634
60a14ad85270
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kvn
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1609
diff
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|
2086 } |
|
60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
kvn
parents:
1609
diff
changeset
|
2087 |
| 0 | 2088 // Loop transforms on the ideal graph. Range Check Elimination, |
| 2089 // peeling, unrolling, etc. | |
| 2090 | |
| 2091 // Set loop opts counter | |
| 2092 loop_opts_cnt = num_loop_opts(); | |
| 2093 if((loop_opts_cnt > 0) && (has_loops() || has_split_ifs())) { | |
| 2094 { | |
| 2095 TracePhase t2("idealLoop", &_t_idealLoop, true); | |
| 2445 | 2096 PhaseIdealLoop ideal_loop( igvn, true ); |
| 0 | 2097 loop_opts_cnt--; |
| 10405 | 2098 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP1, 2); |
| 0 | 2099 if (failing()) return; |
| 2100 } | |
| 2101 // Loop opts pass if partial peeling occurred in previous pass | |
| 2102 if(PartialPeelLoop && major_progress() && (loop_opts_cnt > 0)) { | |
| 2103 TracePhase t3("idealLoop", &_t_idealLoop, true); | |
| 2445 | 2104 PhaseIdealLoop ideal_loop( igvn, false ); |
| 0 | 2105 loop_opts_cnt--; |
| 10405 | 2106 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP2, 2); |
| 0 | 2107 if (failing()) return; |
| 2108 } | |
| 2109 // Loop opts pass for loop-unrolling before CCP | |
| 2110 if(major_progress() && (loop_opts_cnt > 0)) { | |
| 2111 TracePhase t4("idealLoop", &_t_idealLoop, true); | |
| 2445 | 2112 PhaseIdealLoop ideal_loop( igvn, false ); |
| 0 | 2113 loop_opts_cnt--; |
| 10405 | 2114 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP3, 2); |
| 0 | 2115 } |
|
921
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
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|
2116 if (!failing()) { |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
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|
2117 // Verify that last round of loop opts produced a valid graph |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2118 NOT_PRODUCT( TracePhase t2("idealLoopVerify", &_t_idealLoopVerify, TimeCompiler); ) |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
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|
2119 PhaseIdealLoop::verify(igvn); |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2120 } |
| 0 | 2121 } |
| 2122 if (failing()) return; | |
| 2123 | |
| 2124 // Conditional Constant Propagation; | |
| 2125 PhaseCCP ccp( &igvn ); | |
| 2126 assert( true, "Break here to ccp.dump_nodes_and_types(_root,999,1)"); | |
| 2127 { | |
| 2128 TracePhase t2("ccp", &_t_ccp, true); | |
| 2129 ccp.do_transform(); | |
| 2130 } | |
| 10405 | 2131 print_method(PHASE_CPP1, 2); |
| 0 | 2132 |
| 2133 assert( true, "Break here to ccp.dump_old2new_map()"); | |
| 2134 | |
| 2135 // Iterative Global Value Numbering, including ideal transforms | |
| 2136 { | |
| 2137 NOT_PRODUCT( TracePhase t2("iterGVN2", &_t_iterGVN2, TimeCompiler); ) | |
| 2138 igvn = ccp; | |
| 2139 igvn.optimize(); | |
| 2140 } | |
| 2141 | |
| 10405 | 2142 print_method(PHASE_ITER_GVN2, 2); |
| 0 | 2143 |
| 2144 if (failing()) return; | |
| 2145 | |
| 2146 // Loop transforms on the ideal graph. Range Check Elimination, | |
| 2147 // peeling, unrolling, etc. | |
| 2148 if(loop_opts_cnt > 0) { | |
| 2149 debug_only( int cnt = 0; ); | |
| 2150 while(major_progress() && (loop_opts_cnt > 0)) { | |
| 2151 TracePhase t2("idealLoop", &_t_idealLoop, true); | |
| 2152 assert( cnt++ < 40, "infinite cycle in loop optimization" ); | |
| 2445 | 2153 PhaseIdealLoop ideal_loop( igvn, true); |
| 0 | 2154 loop_opts_cnt--; |
| 10405 | 2155 if (major_progress()) print_method(PHASE_PHASEIDEALLOOP_ITERATIONS, 2); |
| 0 | 2156 if (failing()) return; |
| 2157 } | |
| 2158 } | |
|
921
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
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parents:
859
diff
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|
2159 |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2160 { |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2161 // Verify that all previous optimizations produced a valid graph |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
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|
2162 // at least to this point, even if no loop optimizations were done. |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
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|
2163 NOT_PRODUCT( TracePhase t2("idealLoopVerify", &_t_idealLoopVerify, TimeCompiler); ) |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2164 PhaseIdealLoop::verify(igvn); |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2165 } |
|
046932b72aa2
6862956: PhaseIdealLoop should have a CFG verification mode
never
parents:
859
diff
changeset
|
2166 |
| 0 | 2167 { |
| 2168 NOT_PRODUCT( TracePhase t2("macroExpand", &_t_macroExpand, TimeCompiler); ) | |
| 2169 PhaseMacroExpand mex(igvn); | |
| 2170 if (mex.expand_macro_nodes()) { | |
| 2171 assert(failing(), "must bail out w/ explicit message"); | |
| 2172 return; | |
| 2173 } | |
| 2174 } | |
| 2175 | |
| 2176 } // (End scope of igvn; run destructor if necessary for asserts.) | |
| 2177 | |
| 7605 | 2178 dump_inlining(); |
| 0 | 2179 // A method with only infinite loops has no edges entering loops from root |
| 2180 { | |
| 2181 NOT_PRODUCT( TracePhase t2("graphReshape", &_t_graphReshaping, TimeCompiler); ) | |
| 2182 if (final_graph_reshaping()) { | |
| 2183 assert(failing(), "must bail out w/ explicit message"); | |
| 2184 return; | |
| 2185 } | |
| 2186 } | |
| 2187 | |
| 10405 | 2188 print_method(PHASE_OPTIMIZE_FINISHED, 2); |
| 0 | 2189 } |
| 2190 | |
| 2191 | |
| 2192 //------------------------------Code_Gen--------------------------------------- | |
| 2193 // Given a graph, generate code for it | |
| 2194 void Compile::Code_Gen() { | |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2195 if (failing()) { |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
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|
2196 return; |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2197 } |
| 0 | 2198 |
| 2199 // Perform instruction selection. You might think we could reclaim Matcher | |
| 2200 // memory PDQ, but actually the Matcher is used in generating spill code. | |
| 2201 // Internals of the Matcher (including some VectorSets) must remain live | |
| 2202 // for awhile - thus I cannot reclaim Matcher memory lest a VectorSet usage | |
| 2203 // set a bit in reclaimed memory. | |
| 2204 | |
| 2205 // In debug mode can dump m._nodes.dump() for mapping of ideal to machine | |
| 2206 // nodes. Mapping is only valid at the root of each matched subtree. | |
| 2207 NOT_PRODUCT( verify_graph_edges(); ) | |
| 2208 | |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
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|
2209 Matcher matcher; |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
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|
2210 _matcher = &matcher; |
| 0 | 2211 { |
| 2212 TracePhase t2("matcher", &_t_matcher, true); | |
|
12071
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8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
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|
2213 matcher.match(); |
| 0 | 2214 } |
| 2215 // In debug mode can dump m._nodes.dump() for mapping of ideal to machine | |
| 2216 // nodes. Mapping is only valid at the root of each matched subtree. | |
| 2217 NOT_PRODUCT( verify_graph_edges(); ) | |
| 2218 | |
| 2219 // If you have too many nodes, or if matching has failed, bail out | |
| 2220 check_node_count(0, "out of nodes matching instructions"); | |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2221 if (failing()) { |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2222 return; |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2223 } |
| 0 | 2224 |
| 2225 // Build a proper-looking CFG | |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2226 PhaseCFG cfg(node_arena(), root(), matcher); |
| 0 | 2227 _cfg = &cfg; |
| 2228 { | |
| 2229 NOT_PRODUCT( TracePhase t2("scheduler", &_t_scheduler, TimeCompiler); ) | |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2230 bool success = cfg.do_global_code_motion(); |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2231 if (!success) { |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2232 return; |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2233 } |
| 0 | 2234 |
| 10405 | 2235 print_method(PHASE_GLOBAL_CODE_MOTION, 2); |
| 0 | 2236 NOT_PRODUCT( verify_graph_edges(); ) |
| 2237 debug_only( cfg.verify(); ) | |
| 2238 } | |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2239 |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2240 PhaseChaitin regalloc(unique(), cfg, matcher); |
| 0 | 2241 _regalloc = ®alloc; |
| 2242 { | |
| 2243 TracePhase t2("regalloc", &_t_registerAllocation, true); | |
| 2244 // Perform register allocation. After Chaitin, use-def chains are | |
| 2245 // no longer accurate (at spill code) and so must be ignored. | |
| 2246 // Node->LRG->reg mappings are still accurate. | |
| 2247 _regalloc->Register_Allocate(); | |
| 2248 | |
| 2249 // Bail out if the allocator builds too many nodes | |
| 10111 | 2250 if (failing()) { |
| 2251 return; | |
| 2252 } | |
| 0 | 2253 } |
| 2254 | |
| 2255 // Prior to register allocation we kept empty basic blocks in case the | |
| 2256 // the allocator needed a place to spill. After register allocation we | |
| 2257 // are not adding any new instructions. If any basic block is empty, we | |
| 2258 // can now safely remove it. | |
| 2259 { | |
| 418 | 2260 NOT_PRODUCT( TracePhase t2("blockOrdering", &_t_blockOrdering, TimeCompiler); ) |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2261 cfg.remove_empty_blocks(); |
| 418 | 2262 if (do_freq_based_layout()) { |
| 2263 PhaseBlockLayout layout(cfg); | |
| 2264 } else { | |
| 2265 cfg.set_loop_alignment(); | |
| 2266 } | |
| 2267 cfg.fixup_flow(); | |
| 0 | 2268 } |
| 2269 | |
| 2270 // Apply peephole optimizations | |
| 2271 if( OptoPeephole ) { | |
| 2272 NOT_PRODUCT( TracePhase t2("peephole", &_t_peephole, TimeCompiler); ) | |
| 2273 PhasePeephole peep( _regalloc, cfg); | |
| 2274 peep.do_transform(); | |
| 2275 } | |
| 2276 | |
|
14428
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
parents:
14422
diff
changeset
|
2277 // Do late expand if CPU requires this. |
|
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
parents:
14422
diff
changeset
|
2278 if (Matcher::require_postalloc_expand) { |
|
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
parents:
14422
diff
changeset
|
2279 NOT_PRODUCT(TracePhase t2c("postalloc_expand", &_t_postalloc_expand, true)); |
|
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
parents:
14422
diff
changeset
|
2280 cfg.postalloc_expand(_regalloc); |
|
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
parents:
14422
diff
changeset
|
2281 } |
|
044b28168e20
8003854: PPC64 (part 115): Introduce PostallocExpand that expands nodes after register allocation
goetz
parents:
14422
diff
changeset
|
2282 |
| 0 | 2283 // Convert Nodes to instruction bits in a buffer |
| 2284 { | |
| 2285 // %%%% workspace merge brought two timers together for one job | |
| 2286 TracePhase t2a("output", &_t_output, true); | |
| 2287 NOT_PRODUCT( TraceTime t2b(NULL, &_t_codeGeneration, TimeCompiler, false); ) | |
| 2288 Output(); | |
| 2289 } | |
| 2290 | |
| 10405 | 2291 print_method(PHASE_FINAL_CODE); |
| 0 | 2292 |
| 2293 // He's dead, Jim. | |
| 2294 _cfg = (PhaseCFG*)0xdeadbeef; | |
| 2295 _regalloc = (PhaseChaitin*)0xdeadbeef; | |
| 2296 } | |
| 2297 | |
| 2298 | |
| 2299 //------------------------------dump_asm--------------------------------------- | |
| 2300 // Dump formatted assembly | |
| 2301 #ifndef PRODUCT | |
| 2302 void Compile::dump_asm(int *pcs, uint pc_limit) { | |
| 2303 bool cut_short = false; | |
| 2304 tty->print_cr("#"); | |
| 2305 tty->print("# "); _tf->dump(); tty->cr(); | |
| 2306 tty->print_cr("#"); | |
| 2307 | |
| 2308 // For all blocks | |
| 2309 int pc = 0x0; // Program counter | |
| 2310 char starts_bundle = ' '; | |
| 2311 _regalloc->dump_frame(); | |
| 2312 | |
| 2313 Node *n = NULL; | |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
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12023
diff
changeset
|
2314 for (uint i = 0; i < _cfg->number_of_blocks(); i++) { |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2315 if (VMThread::should_terminate()) { |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2316 cut_short = true; |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2317 break; |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2318 } |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2319 Block* block = _cfg->get_block(i); |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2320 if (block->is_connector() && !Verbose) { |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2321 continue; |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2322 } |
|
12167
650868c062a9
8023691: Create interface for nodes in class Block
adlertz
parents:
12071
diff
changeset
|
2323 n = block->head(); |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2324 if (pcs && n->_idx < pc_limit) { |
| 0 | 2325 tty->print("%3.3x ", pcs[n->_idx]); |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2326 } else { |
| 0 | 2327 tty->print(" "); |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2328 } |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2329 block->dump_head(_cfg); |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2330 if (block->is_connector()) { |
| 0 | 2331 tty->print_cr(" # Empty connector block"); |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2332 } else if (block->num_preds() == 2 && block->pred(1)->is_CatchProj() && block->pred(1)->as_CatchProj()->_con == CatchProjNode::fall_through_index) { |
| 0 | 2333 tty->print_cr(" # Block is sole successor of call"); |
| 2334 } | |
| 2335 | |
| 2336 // For all instructions | |
| 2337 Node *delay = NULL; | |
|
12167
650868c062a9
8023691: Create interface for nodes in class Block
adlertz
parents:
12071
diff
changeset
|
2338 for (uint j = 0; j < block->number_of_nodes(); j++) { |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2339 if (VMThread::should_terminate()) { |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2340 cut_short = true; |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2341 break; |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2342 } |
|
12167
650868c062a9
8023691: Create interface for nodes in class Block
adlertz
parents:
12071
diff
changeset
|
2343 n = block->get_node(j); |
| 0 | 2344 if (valid_bundle_info(n)) { |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2345 Bundle* bundle = node_bundling(n); |
| 0 | 2346 if (bundle->used_in_unconditional_delay()) { |
| 2347 delay = n; | |
| 2348 continue; | |
| 2349 } | |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2350 if (bundle->starts_bundle()) { |
| 0 | 2351 starts_bundle = '+'; |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2352 } |
| 0 | 2353 } |
| 2354 | |
|
12071
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2355 if (WizardMode) { |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2356 n->dump(); |
|
adb9a7d94cb5
8023003: Cleanup the public interface to PhaseCFG
adlertz
parents:
12023
diff
changeset
|
2357 } |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2358 |
| 0 | 2359 if( !n->is_Region() && // Dont print in the Assembly |
| 2360 !n->is_Phi() && // a few noisely useless nodes | |
| 2361 !n->is_Proj() && | |
| 2362 !n->is_MachTemp() && | |
|
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1080
diff
changeset
|
2363 !n->is_SafePointScalarObject() && |
| 0 | 2364 !n->is_Catch() && // Would be nice to print exception table targets |
| 2365 !n->is_MergeMem() && // Not very interesting | |
| 2366 !n->is_top() && // Debug info table constants | |
| 2367 !(n->is_Con() && !n->is_Mach())// Debug info table constants | |
| 2368 ) { | |
| 2369 if (pcs && n->_idx < pc_limit) | |
| 2370 tty->print("%3.3x", pcs[n->_idx]); | |
| 2371 else | |
| 2372 tty->print(" "); | |
| 2373 tty->print(" %c ", starts_bundle); | |
| 2374 starts_bundle = ' '; | |
| 2375 tty->print("\t"); | |
| 2376 n->format(_regalloc, tty); | |
| 2377 tty->cr(); | |
| 2378 } | |
| 2379 | |
| 2380 // If we have an instruction with a delay slot, and have seen a delay, | |
| 2381 // then back up and print it | |
| 2382 if (valid_bundle_info(n) && node_bundling(n)->use_unconditional_delay()) { | |
| 2383 assert(delay != NULL, "no unconditional delay instruction"); | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2384 if (WizardMode) delay->dump(); |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2385 |
| 0 | 2386 if (node_bundling(delay)->starts_bundle()) |
| 2387 starts_bundle = '+'; | |
| 2388 if (pcs && n->_idx < pc_limit) | |
| 2389 tty->print("%3.3x", pcs[n->_idx]); | |
| 2390 else | |
| 2391 tty->print(" "); | |
| 2392 tty->print(" %c ", starts_bundle); | |
| 2393 starts_bundle = ' '; | |
| 2394 tty->print("\t"); | |
| 2395 delay->format(_regalloc, tty); | |
| 2396 tty->print_cr(""); | |
| 2397 delay = NULL; | |
| 2398 } | |
| 2399 | |
| 2400 // Dump the exception table as well | |
| 2401 if( n->is_Catch() && (Verbose || WizardMode) ) { | |
| 2402 // Print the exception table for this offset | |
| 2403 _handler_table.print_subtable_for(pc); | |
| 2404 } | |
| 2405 } | |
| 2406 | |
| 2407 if (pcs && n->_idx < pc_limit) | |
| 2408 tty->print_cr("%3.3x", pcs[n->_idx]); | |
| 2409 else | |
| 2410 tty->print_cr(""); | |
| 2411 | |
| 2412 assert(cut_short || delay == NULL, "no unconditional delay branch"); | |
| 2413 | |
| 2414 } // End of per-block dump | |
| 2415 tty->print_cr(""); | |
| 2416 | |
| 2417 if (cut_short) tty->print_cr("*** disassembly is cut short ***"); | |
| 2418 } | |
| 2419 #endif | |
| 2420 | |
| 2421 //------------------------------Final_Reshape_Counts--------------------------- | |
| 2422 // This class defines counters to help identify when a method | |
| 2423 // may/must be executed using hardware with only 24-bit precision. | |
| 2424 struct Final_Reshape_Counts : public StackObj { | |
| 2425 int _call_count; // count non-inlined 'common' calls | |
| 2426 int _float_count; // count float ops requiring 24-bit precision | |
| 2427 int _double_count; // count double ops requiring more precision | |
| 2428 int _java_call_count; // count non-inlined 'java' calls | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2429 int _inner_loop_count; // count loops which need alignment |
| 0 | 2430 VectorSet _visited; // Visitation flags |
| 2431 Node_List _tests; // Set of IfNodes & PCTableNodes | |
| 2432 | |
| 2433 Final_Reshape_Counts() : | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2434 _call_count(0), _float_count(0), _double_count(0), |
|
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2435 _java_call_count(0), _inner_loop_count(0), |
| 0 | 2436 _visited( Thread::current()->resource_area() ) { } |
| 2437 | |
| 2438 void inc_call_count () { _call_count ++; } | |
| 2439 void inc_float_count () { _float_count ++; } | |
| 2440 void inc_double_count() { _double_count++; } | |
| 2441 void inc_java_call_count() { _java_call_count++; } | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2442 void inc_inner_loop_count() { _inner_loop_count++; } |
| 0 | 2443 |
| 2444 int get_call_count () const { return _call_count ; } | |
| 2445 int get_float_count () const { return _float_count ; } | |
| 2446 int get_double_count() const { return _double_count; } | |
| 2447 int get_java_call_count() const { return _java_call_count; } | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2448 int get_inner_loop_count() const { return _inner_loop_count; } |
| 0 | 2449 }; |
| 2450 | |
|
9060
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
8730
diff
changeset
|
2451 #ifdef ASSERT |
| 0 | 2452 static bool oop_offset_is_sane(const TypeInstPtr* tp) { |
| 2453 ciInstanceKlass *k = tp->klass()->as_instance_klass(); | |
| 2454 // Make sure the offset goes inside the instance layout. | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2455 return k->contains_field_offset(tp->offset()); |
| 0 | 2456 // Note that OffsetBot and OffsetTop are very negative. |
| 2457 } | |
|
9060
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
8730
diff
changeset
|
2458 #endif |
| 0 | 2459 |
|
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2460 // Eliminate trivially redundant StoreCMs and accumulate their |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2461 // precedence edges. |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2462 void Compile::eliminate_redundant_card_marks(Node* n) { |
|
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2463 assert(n->Opcode() == Op_StoreCM, "expected StoreCM"); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2464 if (n->in(MemNode::Address)->outcnt() > 1) { |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2465 // There are multiple users of the same address so it might be |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2466 // possible to eliminate some of the StoreCMs |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2467 Node* mem = n->in(MemNode::Memory); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2468 Node* adr = n->in(MemNode::Address); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2469 Node* val = n->in(MemNode::ValueIn); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2470 Node* prev = n; |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2471 bool done = false; |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2472 // Walk the chain of StoreCMs eliminating ones that match. As |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2473 // long as it's a chain of single users then the optimization is |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2474 // safe. Eliminating partially redundant StoreCMs would require |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2475 // cloning copies down the other paths. |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2476 while (mem->Opcode() == Op_StoreCM && mem->outcnt() == 1 && !done) { |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2477 if (adr == mem->in(MemNode::Address) && |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2478 val == mem->in(MemNode::ValueIn)) { |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2479 // redundant StoreCM |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2480 if (mem->req() > MemNode::OopStore) { |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2481 // Hasn't been processed by this code yet. |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2482 n->add_prec(mem->in(MemNode::OopStore)); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2483 } else { |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2484 // Already converted to precedence edge |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2485 for (uint i = mem->req(); i < mem->len(); i++) { |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2486 // Accumulate any precedence edges |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2487 if (mem->in(i) != NULL) { |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2488 n->add_prec(mem->in(i)); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2489 } |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2490 } |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2491 // Everything above this point has been processed. |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2492 done = true; |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2493 } |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2494 // Eliminate the previous StoreCM |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2495 prev->set_req(MemNode::Memory, mem->in(MemNode::Memory)); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
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diff
changeset
|
2496 assert(mem->outcnt() == 0, "should be dead"); |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2497 mem->disconnect_inputs(NULL, this); |
|
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2498 } else { |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2499 prev = mem; |
|
e6beb62de02d
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never
parents:
2376
diff
changeset
|
2500 } |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2501 mem = prev->in(MemNode::Memory); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2502 } |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2503 } |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2504 } |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2505 |
| 0 | 2506 //------------------------------final_graph_reshaping_impl---------------------- |
| 2507 // Implement items 1-5 from final_graph_reshaping below. | |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2508 void Compile::final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc) { |
| 0 | 2509 |
|
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
164
diff
changeset
|
2510 if ( n->outcnt() == 0 ) return; // dead node |
| 0 | 2511 uint nop = n->Opcode(); |
| 2512 | |
| 2513 // Check for 2-input instruction with "last use" on right input. | |
| 2514 // Swap to left input. Implements item (2). | |
| 2515 if( n->req() == 3 && // two-input instruction | |
| 2516 n->in(1)->outcnt() > 1 && // left use is NOT a last use | |
| 2517 (!n->in(1)->is_Phi() || n->in(1)->in(2) != n) && // it is not data loop | |
| 2518 n->in(2)->outcnt() == 1 &&// right use IS a last use | |
| 2519 !n->in(2)->is_Con() ) { // right use is not a constant | |
| 2520 // Check for commutative opcode | |
| 2521 switch( nop ) { | |
| 2522 case Op_AddI: case Op_AddF: case Op_AddD: case Op_AddL: | |
| 2523 case Op_MaxI: case Op_MinI: | |
| 2524 case Op_MulI: case Op_MulF: case Op_MulD: case Op_MulL: | |
| 2525 case Op_AndL: case Op_XorL: case Op_OrL: | |
| 2526 case Op_AndI: case Op_XorI: case Op_OrI: { | |
| 2527 // Move "last use" input to left by swapping inputs | |
| 2528 n->swap_edges(1, 2); | |
| 2529 break; | |
| 2530 } | |
| 2531 default: | |
| 2532 break; | |
| 2533 } | |
| 2534 } | |
| 2535 | |
| 1609 | 2536 #ifdef ASSERT |
| 2537 if( n->is_Mem() ) { | |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2538 int alias_idx = get_alias_index(n->as_Mem()->adr_type()); |
| 1609 | 2539 assert( n->in(0) != NULL || alias_idx != Compile::AliasIdxRaw || |
| 2540 // oop will be recorded in oop map if load crosses safepoint | |
| 2541 n->is_Load() && (n->as_Load()->bottom_type()->isa_oopptr() || | |
| 2542 LoadNode::is_immutable_value(n->in(MemNode::Address))), | |
| 2543 "raw memory operations should have control edge"); | |
| 2544 } | |
| 2545 #endif | |
| 0 | 2546 // Count FPU ops and common calls, implements item (3) |
| 2547 switch( nop ) { | |
| 2548 // Count all float operations that may use FPU | |
| 2549 case Op_AddF: | |
| 2550 case Op_SubF: | |
| 2551 case Op_MulF: | |
| 2552 case Op_DivF: | |
| 2553 case Op_NegF: | |
| 2554 case Op_ModF: | |
| 2555 case Op_ConvI2F: | |
| 2556 case Op_ConF: | |
| 2557 case Op_CmpF: | |
| 2558 case Op_CmpF3: | |
| 2559 // 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
|
2560 frc.inc_float_count(); |
| 0 | 2561 break; |
| 2562 | |
| 2563 case Op_ConvF2D: | |
| 2564 case Op_ConvD2F: | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2565 frc.inc_float_count(); |
|
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2566 frc.inc_double_count(); |
| 0 | 2567 break; |
| 2568 | |
| 2569 // Count all double operations that may use FPU | |
| 2570 case Op_AddD: | |
| 2571 case Op_SubD: | |
| 2572 case Op_MulD: | |
| 2573 case Op_DivD: | |
| 2574 case Op_NegD: | |
| 2575 case Op_ModD: | |
| 2576 case Op_ConvI2D: | |
| 2577 case Op_ConvD2I: | |
| 2578 // case Op_ConvL2D: // handled by leaf call | |
| 2579 // case Op_ConvD2L: // handled by leaf call | |
| 2580 case Op_ConD: | |
| 2581 case Op_CmpD: | |
| 2582 case Op_CmpD3: | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2583 frc.inc_double_count(); |
| 0 | 2584 break; |
| 2585 case Op_Opaque1: // Remove Opaque Nodes before matching | |
| 2586 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
|
2587 n->subsume_by(n->in(1), this); |
| 0 | 2588 break; |
| 2589 case Op_CallStaticJava: | |
| 2590 case Op_CallJava: | |
| 2591 case Op_CallDynamicJava: | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2592 frc.inc_java_call_count(); // Count java call site; |
| 0 | 2593 case Op_CallRuntime: |
| 2594 case Op_CallLeaf: | |
| 2595 case Op_CallLeafNoFP: { | |
| 2596 assert( n->is_Call(), "" ); | |
| 2597 CallNode *call = n->as_Call(); | |
| 2598 // Count call sites where the FP mode bit would have to be flipped. | |
| 2599 // Do not count uncommon runtime calls: | |
| 2600 // uncommon_trap, _complete_monitor_locking, _complete_monitor_unlocking, | |
| 2601 // _new_Java, _new_typeArray, _new_objArray, _rethrow_Java, ... | |
| 2602 if( !call->is_CallStaticJava() || !call->as_CallStaticJava()->_name ) { | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2603 frc.inc_call_count(); // Count the call site |
| 0 | 2604 } else { // See if uncommon argument is shared |
| 2605 Node *n = call->in(TypeFunc::Parms); | |
| 2606 int nop = n->Opcode(); | |
| 2607 // Clone shared simple arguments to uncommon calls, item (1). | |
| 2608 if( n->outcnt() > 1 && | |
| 2609 !n->is_Proj() && | |
| 2610 nop != Op_CreateEx && | |
| 2611 nop != Op_CheckCastPP && | |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2612 nop != Op_DecodeN && |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2613 nop != Op_DecodeNKlass && |
| 0 | 2614 !n->is_Mem() ) { |
| 2615 Node *x = n->clone(); | |
| 2616 call->set_req( TypeFunc::Parms, x ); | |
| 2617 } | |
| 2618 } | |
| 2619 break; | |
| 2620 } | |
| 2621 | |
| 2622 case Op_StoreD: | |
| 2623 case Op_LoadD: | |
| 2624 case Op_LoadD_unaligned: | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2625 frc.inc_double_count(); |
| 0 | 2626 goto handle_mem; |
| 2627 case Op_StoreF: | |
| 2628 case Op_LoadF: | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2629 frc.inc_float_count(); |
| 0 | 2630 goto handle_mem; |
| 2631 | |
|
3248
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2632 case Op_StoreCM: |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2633 { |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2634 // Convert OopStore dependence into precedence edge |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2635 Node* prec = n->in(MemNode::OopStore); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2636 n->del_req(MemNode::OopStore); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2637 n->add_prec(prec); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2638 eliminate_redundant_card_marks(n); |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2639 } |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2640 |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2641 // fall through |
|
e6beb62de02d
7032963: StoreCM shouldn't participate in store elimination
never
parents:
2376
diff
changeset
|
2642 |
| 0 | 2643 case Op_StoreB: |
| 2644 case Op_StoreC: | |
| 2645 case Op_StorePConditional: | |
| 2646 case Op_StoreI: | |
| 2647 case Op_StoreL: | |
|
420
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
418
diff
changeset
|
2648 case Op_StoreIConditional: |
| 0 | 2649 case Op_StoreLConditional: |
| 2650 case Op_CompareAndSwapI: | |
| 2651 case Op_CompareAndSwapL: | |
| 2652 case Op_CompareAndSwapP: | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2653 case Op_CompareAndSwapN: |
|
6795
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2654 case Op_GetAndAddI: |
|
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2655 case Op_GetAndAddL: |
|
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2656 case Op_GetAndSetI: |
|
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2657 case Op_GetAndSetL: |
|
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2658 case Op_GetAndSetP: |
|
7eca5de9e0b6
7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()
roland
parents:
6792
diff
changeset
|
2659 case Op_GetAndSetN: |
| 0 | 2660 case Op_StoreP: |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2661 case Op_StoreN: |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2662 case Op_StoreNKlass: |
| 0 | 2663 case Op_LoadB: |
| 624 | 2664 case Op_LoadUB: |
|
558
3b5ac9e7e6ea
6796746: rename LoadC (char) opcode class to LoadUS (unsigned short)
twisti
parents:
492
diff
changeset
|
2665 case Op_LoadUS: |
| 0 | 2666 case Op_LoadI: |
| 2667 case Op_LoadKlass: | |
|
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2668 case Op_LoadNKlass: |
| 0 | 2669 case Op_LoadL: |
| 2670 case Op_LoadL_unaligned: | |
| 2671 case Op_LoadPLocked: | |
| 2672 case Op_LoadP: | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
100
diff
changeset
|
2673 case Op_LoadN: |
| 0 | 2674 case Op_LoadRange: |
| 2675 case Op_LoadS: { | |
| 2676 handle_mem: | |
| 2677 #ifdef ASSERT | |
| 2678 if( VerifyOptoOopOffsets ) { | |
| 2679 assert( n->is_Mem(), "" ); | |
| 2680 MemNode *mem = (MemNode*)n; | |
| 2681 // Check to see if address types have grounded out somehow. | |
| 2682 const TypeInstPtr *tp = mem->in(MemNode::Address)->bottom_type()->isa_instptr(); | |
| 2683 assert( !tp || oop_offset_is_sane(tp), "" ); | |
| 2684 } | |
| 2685 #endif | |
| 2686 break; | |
| 2687 } | |
| 2688 | |
| 2689 case Op_AddP: { // Assert sane base pointers | |
|
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2690 Node *addp = n->in(AddPNode::Address); |
| 0 | 2691 assert( !addp->is_AddP() || |
| 2692 addp->in(AddPNode::Base)->is_top() || // Top OK for allocation | |
| 2693 addp->in(AddPNode::Base) == n->in(AddPNode::Base), | |
| 2694 "Base pointers must match" ); | |
|
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2695 #ifdef _LP64 |
|
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12167
diff
changeset
|
2696 if ((UseCompressedOops || UseCompressedClassPointers) && |
|
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2697 addp->Opcode() == Op_ConP && |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2698 addp == n->in(AddPNode::Base) && |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2699 n->in(AddPNode::Offset)->is_Con()) { |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2700 // 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
|
2701 // 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
|
2702 // instructions (4) then load 64-bits constant (7). |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2703 // 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
|
2704 const Type* t = addp->bottom_type(); |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2705 if (t->isa_oopptr() || t->isa_klassptr()) { |
|
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2706 Node* nn = NULL; |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2707 |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2708 int op = t->isa_oopptr() ? Op_ConN : Op_ConNKlass; |
|
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2709 |
|
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2710 // 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
|
2711 Node* r = root(); |
|
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2712 uint cnt = r->outcnt(); |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2713 for (uint i = 0; i < cnt; i++) { |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2714 Node* m = r->raw_out(i); |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2715 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
|
2716 m->bottom_type()->make_ptr() == t) { |
|
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2717 nn = m; |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2718 break; |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2719 } |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2720 } |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2721 if (nn != NULL) { |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2722 // Decode a narrow oop to match address |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2723 // [R12 + narrow_oop_reg<<3 + offset] |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2724 if (t->isa_oopptr()) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2725 nn = new (this) DecodeNNode(nn, t); |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2726 } else { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2727 nn = new (this) DecodeNKlassNode(nn, t); |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2728 } |
|
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2729 n->set_req(AddPNode::Base, nn); |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2730 n->set_req(AddPNode::Address, nn); |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2731 if (addp->outcnt() == 0) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2732 addp->disconnect_inputs(NULL, this); |
|
182
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2733 } |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2734 } |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2735 } |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2736 } |
|
44abbb0d4c18
6709093: Compressed Oops: reduce size of compiled methods
kvn
parents:
168
diff
changeset
|
2737 #endif |
| 0 | 2738 break; |
| 2739 } | |
| 2740 | |
|
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2741 #ifdef _LP64 |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2742 case Op_CastPP: |
|
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2743 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
|
2744 Node* in1 = n->in(1); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2745 const Type* t = n->bottom_type(); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2746 Node* new_in1 = in1->clone(); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2747 new_in1->as_DecodeN()->set_type(t); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2748 |
|
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2749 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
|
2750 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2751 // 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
|
2752 // 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
|
2753 // 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
|
2754 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2755 // [R12 + narrow_oop_reg<<3 + offset] |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2756 // NullCheck narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2757 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2758 // 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
|
2759 // 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
|
2760 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2761 // 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
|
2762 // [base_reg + offset] |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2763 // NullCheck base_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2764 // |
| 605 | 2765 // 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
|
2766 // 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
|
2767 // 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
|
2768 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2769 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
|
2770 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2771 |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2772 n->subsume_by(new_in1, this); |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2773 if (in1->outcnt() == 0) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2774 in1->disconnect_inputs(NULL, this); |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2775 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2776 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2777 break; |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2778 |
|
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2779 case Op_CmpP: |
|
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
164
diff
changeset
|
2780 // 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
|
2781 // other TypePtr related Ideal optimizations (for example, ptr nullness). |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2782 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
|
2783 Node* in1 = n->in(1); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2784 Node* in2 = n->in(2); |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2785 if (!in1->is_DecodeNarrowPtr()) { |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2786 in2 = in1; |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2787 in1 = n->in(2); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2788 } |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2789 assert(in1->is_DecodeNarrowPtr(), "sanity"); |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2790 |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2791 Node* new_in2 = NULL; |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2792 if (in2->is_DecodeNarrowPtr()) { |
|
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2793 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
|
2794 new_in2 = in2->in(1); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2795 } else if (in2->Opcode() == Op_ConP) { |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2796 const Type* t = in2->bottom_type(); |
|
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2797 if (t == TypePtr::NULL_PTR) { |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2798 assert(in1->is_DecodeN(), "compare klass to null?"); |
|
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2799 // 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
|
2800 // oops implicit null check is not generated. |
|
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2801 // 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
|
2802 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
|
2803 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
|
2804 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2805 // This transformation together with CastPP transformation above |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2806 // 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
|
2807 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2808 // The original code after Optimize() |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2809 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2810 // LoadN memory, narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2811 // decode narrow_oop_reg, base_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2812 // CmpP base_reg, NULL |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2813 // CastPP base_reg // NotNull |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2814 // Load [base_reg + offset], val_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2815 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2816 // after these transformations will be |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2817 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2818 // LoadN memory, narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2819 // CmpN narrow_oop_reg, NULL |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2820 // 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
|
2821 // Load [base_reg + offset], val_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2822 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2823 // 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
|
2824 // 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
|
2825 // final_graph_reshaping_walk()). |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2826 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2827 // 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
|
2828 // on x86: |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2829 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2830 // Load_narrow_oop memory, narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2831 // 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
|
2832 // NullCheck narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2833 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2834 // and on sparc: |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2835 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2836 // Load_narrow_oop memory, narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2837 // 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
|
2838 // Load [base_reg + offset], val_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2839 // NullCheck base_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2840 // |
|
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2841 } else if (t->isa_oopptr()) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2842 new_in2 = ConNode::make(this, t->make_narrowoop()); |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2843 } else if (t->isa_klassptr()) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2844 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
|
2845 } |
|
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2846 } |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2847 if (new_in2 != NULL) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2848 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
|
2849 n->subsume_by(cmpN, this); |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2850 if (in1->outcnt() == 0) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2851 in1->disconnect_inputs(NULL, this); |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2852 } |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2853 if (in2->outcnt() == 0) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2854 in2->disconnect_inputs(NULL, this); |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2855 } |
|
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2856 } |
|
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2857 } |
|
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
253
diff
changeset
|
2858 break; |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2859 |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2860 case Op_DecodeN: |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2861 case Op_DecodeNKlass: |
|
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2862 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
|
2863 // 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
|
2864 // 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
|
2865 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
|
2866 break; |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2867 |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2868 case Op_EncodeP: |
|
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2869 case Op_EncodePKlass: { |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2870 Node* in1 = n->in(1); |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2871 if (in1->is_DecodeNarrowPtr()) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2872 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
|
2873 } else if (in1->Opcode() == Op_ConP) { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2874 const Type* t = in1->bottom_type(); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2875 if (t == TypePtr::NULL_PTR) { |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2876 assert(t->isa_oopptr(), "null klass?"); |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2877 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
|
2878 } else if (t->isa_oopptr()) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2879 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
|
2880 } else if (t->isa_klassptr()) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2881 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
|
2882 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2883 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2884 if (in1->outcnt() == 0) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2885 in1->disconnect_inputs(NULL, this); |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2886 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2887 break; |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2888 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2889 |
|
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2890 case Op_Proj: { |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2891 if (OptimizeStringConcat) { |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2892 ProjNode* p = n->as_Proj(); |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2893 if (p->_is_io_use) { |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2894 // Separate projections were used for the exception path which |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2895 // 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
|
2896 // then they will hang around and should just be replaced with |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2897 // the original one. |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2898 Node* proj = NULL; |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2899 // Replace with just one |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2900 for (SimpleDUIterator i(p->in(0)); i.has_next(); i.next()) { |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2901 Node *use = i.get(); |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2902 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
|
2903 proj = use; |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2904 break; |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2905 } |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2906 } |
| 4767 | 2907 assert(proj != NULL, "must be found"); |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2908 p->subsume_by(proj, this); |
|
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2909 } |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2910 } |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2911 break; |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2912 } |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2913 |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2914 case Op_Phi: |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
2915 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
|
2916 // 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
|
2917 // 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
|
2918 Node* unique_in = n->in(1); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2919 assert(unique_in != NULL, ""); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2920 uint cnt = n->req(); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2921 for (uint i = 2; i < cnt; i++) { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2922 Node* m = n->in(i); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2923 assert(m != NULL, ""); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2924 if (unique_in != m) |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2925 unique_in = NULL; |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2926 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2927 if (unique_in != NULL) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2928 n->subsume_by(unique_in, this); |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2929 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2930 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2931 break; |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2932 |
|
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2933 #endif |
|
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2934 |
| 0 | 2935 case Op_ModI: |
| 2936 if (UseDivMod) { | |
| 2937 // Check if a%b and a/b both exist | |
| 2938 Node* d = n->find_similar(Op_DivI); | |
| 2939 if (d) { | |
| 2940 // Replace them with a fused divmod if supported | |
| 2941 if (Matcher::has_match_rule(Op_DivModI)) { | |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2942 DivModINode* divmod = DivModINode::make(this, n); |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2943 d->subsume_by(divmod->div_proj(), this); |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2944 n->subsume_by(divmod->mod_proj(), this); |
| 0 | 2945 } else { |
| 2946 // 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
|
2947 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
|
2948 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
|
2949 n->subsume_by(sub, this); |
| 0 | 2950 } |
| 2951 } | |
| 2952 } | |
| 2953 break; | |
| 2954 | |
| 2955 case Op_ModL: | |
| 2956 if (UseDivMod) { | |
| 2957 // Check if a%b and a/b both exist | |
| 2958 Node* d = n->find_similar(Op_DivL); | |
| 2959 if (d) { | |
| 2960 // Replace them with a fused divmod if supported | |
| 2961 if (Matcher::has_match_rule(Op_DivModL)) { | |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2962 DivModLNode* divmod = DivModLNode::make(this, n); |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2963 d->subsume_by(divmod->div_proj(), this); |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2964 n->subsume_by(divmod->mod_proj(), this); |
| 0 | 2965 } else { |
| 2966 // 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
|
2967 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
|
2968 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
|
2969 n->subsume_by(sub, this); |
| 0 | 2970 } |
| 2971 } | |
| 2972 } | |
| 2973 break; | |
| 2974 | |
|
6179
8c92982cbbc4
7119644: Increase superword's vector size up to 256 bits
kvn
parents:
6143
diff
changeset
|
2975 case Op_LoadVector: |
|
8c92982cbbc4
7119644: Increase superword's vector size up to 256 bits
kvn
parents:
6143
diff
changeset
|
2976 case Op_StoreVector: |
| 0 | 2977 break; |
| 2978 | |
| 2979 case Op_PackB: | |
| 2980 case Op_PackS: | |
| 2981 case Op_PackI: | |
| 2982 case Op_PackF: | |
| 2983 case Op_PackL: | |
| 2984 case Op_PackD: | |
| 2985 if (n->req()-1 > 2) { | |
| 2986 // Replace many operand PackNodes with a binary tree for matching | |
| 2987 PackNode* p = (PackNode*) n; | |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
2988 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
|
2989 n->subsume_by(btp, this); |
| 0 | 2990 } |
| 2991 break; | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2992 case Op_Loop: |
|
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2993 case Op_CountedLoop: |
|
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2994 if (n->as_Loop()->is_inner_loop()) { |
|
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2995 frc.inc_inner_loop_count(); |
|
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2996 } |
|
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
2997 break; |
|
2401
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2998 case Op_LShiftI: |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
2999 case Op_RShiftI: |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3000 case Op_URShiftI: |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3001 case Op_LShiftL: |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3002 case Op_RShiftL: |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3003 case Op_URShiftL: |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3004 if (Matcher::need_masked_shift_count) { |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3005 // 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
|
3006 // lower 5/6 bits. We need to do the masking ourselves. |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3007 Node* in2 = n->in(2); |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3008 juint mask = (n->bottom_type() == TypeInt::INT) ? (BitsPerInt - 1) : (BitsPerLong - 1); |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3009 const TypeInt* t = in2->find_int_type(); |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3010 if (t != NULL && t->is_con()) { |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3011 juint shift = t->get_con(); |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3012 if (shift > mask) { // Unsigned cmp |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3013 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
|
3014 } |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3015 } else { |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3016 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
|
3017 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
|
3018 n->set_req(2, shift); |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3019 } |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3020 } |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3021 if (in2->outcnt() == 0) { // Remove dead node |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3022 in2->disconnect_inputs(NULL, this); |
|
2401
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3023 } |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3024 } |
|
7e88bdae86ec
7029017: Additional architecture support for c2 compiler
roland
parents:
2376
diff
changeset
|
3025 break; |
|
8694
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3026 case Op_MemBarStoreStore: |
| 10278 | 3027 case Op_MemBarRelease: |
|
8694
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3028 // Break the link with AllocateNode: it is no longer useful and |
|
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3029 // confuses register allocation. |
|
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3030 if (n->req() > MemBarNode::Precedent) { |
|
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3031 n->set_req(MemBarNode::Precedent, top()); |
|
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3032 } |
|
8651f608fea4
8009460: C2compiler crash in machnode::in_regmask(unsigned int)
roland
parents:
8691
diff
changeset
|
3033 break; |
|
12888
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3034 // Must set a control edge on all nodes that produce a FlagsProj |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3035 // so they can't escape the block that consumes the flags. |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3036 // Must also set the non throwing branch as the control |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3037 // for all nodes that depends on the result. Unless the node |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3038 // already have a control that isn't the control of the |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3039 // flag producer |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3040 case Op_FlagsProj: |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3041 { |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3042 MathExactNode* math = (MathExactNode*) n->in(0); |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3043 Node* ctrl = math->control_node(); |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3044 Node* non_throwing = math->non_throwing_branch(); |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3045 math->set_req(0, ctrl); |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3046 |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3047 Node* result = math->result_node(); |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3048 if (result != NULL) { |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3049 for (DUIterator_Fast jmax, j = result->fast_outs(jmax); j < jmax; j++) { |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3050 Node* out = result->fast_out(j); |
|
12963
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3051 // Phi nodes shouldn't be moved. They would only match below if they |
|
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3052 // had the same control as the MathExactNode. The only time that |
|
435c7b4577cd
8026959: assert(!n->pinned() || n->is_MachConstantBase()) failed: only pinned MachConstantBase node is expected here
rbackman
parents:
12956
diff
changeset
|
3053 // would happen is if the Phi is also an input to the MathExact |
|
13043
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3054 // |
|
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3055 // Cmp nodes shouldn't have control set at all. |
|
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3056 if (out->is_Phi() || |
|
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3057 out->is_Cmp()) { |
|
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3058 continue; |
|
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3059 } |
|
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3060 |
|
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3061 if (out->in(0) == NULL) { |
|
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3062 out->set_req(0, non_throwing); |
|
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3063 } else if (out->in(0) == ctrl) { |
|
e428d5e768e3
8027622: java.time.Instant.create failing since hs25-b56
rbackman
parents:
12966
diff
changeset
|
3064 out->set_req(0, non_throwing); |
|
12888
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3065 } |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3066 } |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3067 } |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3068 } |
|
4a2acfb16e97
8025657: compiler/intrinsics/mathexact/ConstantTest.java fails on assert in lcm.cpp on solaris x64
rbackman
parents:
12295
diff
changeset
|
3069 break; |
| 0 | 3070 default: |
| 3071 assert( !n->is_Call(), "" ); | |
| 3072 assert( !n->is_Mem(), "" ); | |
| 3073 break; | |
| 3074 } | |
| 127 | 3075 |
| 3076 // Collect CFG split points | |
| 3077 if (n->is_MultiBranch()) | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3078 frc._tests.push(n); |
| 0 | 3079 } |
| 3080 | |
| 3081 //------------------------------final_graph_reshaping_walk--------------------- | |
| 3082 // Replacing Opaque nodes with their input in final_graph_reshaping_impl(), | |
| 3083 // 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
|
3084 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
|
3085 ResourceArea *area = Thread::current()->resource_area(); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3086 Unique_Node_List sfpt(area); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3087 |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3088 frc._visited.set(root->_idx); // first, mark node as visited |
| 0 | 3089 uint cnt = root->req(); |
| 3090 Node *n = root; | |
| 3091 uint i = 0; | |
| 3092 while (true) { | |
| 3093 if (i < cnt) { | |
| 3094 // Place all non-visited non-null inputs onto stack | |
| 3095 Node* m = n->in(i); | |
| 3096 ++i; | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3097 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
|
3098 if (m->is_SafePoint() && m->as_SafePoint()->jvms() != NULL) |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3099 sfpt.push(m); |
| 0 | 3100 cnt = m->req(); |
| 3101 nstack.push(n, i); // put on stack parent and next input's index | |
| 3102 n = m; | |
| 3103 i = 0; | |
| 3104 } | |
| 3105 } else { | |
| 3106 // Now do post-visit work | |
|
859
ea3f9723b5cf
6860599: nodes limit could be reached during Output phase
kvn
parents:
856
diff
changeset
|
3107 final_graph_reshaping_impl( n, frc ); |
| 0 | 3108 if (nstack.is_empty()) |
| 3109 break; // finished | |
| 3110 n = nstack.node(); // Get node from stack | |
| 3111 cnt = n->req(); | |
| 3112 i = nstack.index(); | |
| 3113 nstack.pop(); // Shift to the next node on stack | |
| 3114 } | |
| 3115 } | |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3116 |
|
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
3117 // Skip next transformation if compressed oops are not used. |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
3118 if ((UseCompressedOops && !Matcher::gen_narrow_oop_implicit_null_checks()) || |
|
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12167
diff
changeset
|
3119 (!UseCompressedOops && !UseCompressedClassPointers)) |
|
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
3120 return; |
|
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
3121 |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
3122 // Go over safepoints nodes to skip DecodeN/DecodeNKlass nodes for debug edges. |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3123 // It could be done for an uncommon traps or any safepoints/calls |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
3124 // if the DecodeN/DecodeNKlass node is referenced only in a debug info. |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3125 while (sfpt.size() > 0) { |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3126 n = sfpt.pop(); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3127 JVMState *jvms = n->as_SafePoint()->jvms(); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3128 assert(jvms != NULL, "sanity"); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3129 int start = jvms->debug_start(); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3130 int end = n->req(); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3131 bool is_uncommon = (n->is_CallStaticJava() && |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3132 n->as_CallStaticJava()->uncommon_trap_request() != 0); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3133 for (int j = start; j < end; j++) { |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3134 Node* in = n->in(j); |
|
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6843
diff
changeset
|
3135 if (in->is_DecodeNarrowPtr()) { |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3136 bool safe_to_skip = true; |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3137 if (!is_uncommon ) { |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3138 // Is it safe to skip? |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3139 for (uint i = 0; i < in->outcnt(); i++) { |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3140 Node* u = in->raw_out(i); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3141 if (!u->is_SafePoint() || |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3142 u->is_Call() && u->as_Call()->has_non_debug_use(n)) { |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3143 safe_to_skip = false; |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3144 } |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3145 } |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3146 } |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3147 if (safe_to_skip) { |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
3148 n->set_req(j, in->in(1)); |
|
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3149 } |
|
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|
3150 if (in->outcnt() == 0) { |
|
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|
3151 in->disconnect_inputs(NULL, this); |
|
331
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|
3152 } |
|
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|
3153 } |
|
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|
3154 } |
|
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|
3155 } |
| 0 | 3156 } |
| 3157 | |
| 3158 //------------------------------final_graph_reshaping-------------------------- | |
| 3159 // Final Graph Reshaping. | |
| 3160 // | |
| 3161 // (1) Clone simple inputs to uncommon calls, so they can be scheduled late | |
| 3162 // and not commoned up and forced early. Must come after regular | |
| 3163 // optimizations to avoid GVN undoing the cloning. Clone constant | |
| 3164 // inputs to Loop Phis; these will be split by the allocator anyways. | |
| 3165 // Remove Opaque nodes. | |
| 3166 // (2) Move last-uses by commutative operations to the left input to encourage | |
| 3167 // Intel update-in-place two-address operations and better register usage | |
| 3168 // on RISCs. Must come after regular optimizations to avoid GVN Ideal | |
| 3169 // calls canonicalizing them back. | |
| 3170 // (3) Count the number of double-precision FP ops, single-precision FP ops | |
| 3171 // and call sites. On Intel, we can get correct rounding either by | |
| 3172 // forcing singles to memory (requires extra stores and loads after each | |
| 3173 // FP bytecode) or we can set a rounding mode bit (requires setting and | |
| 3174 // clearing the mode bit around call sites). The mode bit is only used | |
| 3175 // if the relative frequency of single FP ops to calls is low enough. | |
| 3176 // This is a key transform for SPEC mpeg_audio. | |
| 3177 // (4) Detect infinite loops; blobs of code reachable from above but not | |
| 3178 // below. Several of the Code_Gen algorithms fail on such code shapes, | |
| 3179 // so we simply bail out. Happens a lot in ZKM.jar, but also happens | |
| 3180 // from time to time in other codes (such as -Xcomp finalizer loops, etc). | |
| 3181 // Detection is by looking for IfNodes where only 1 projection is | |
| 3182 // reachable from below or CatchNodes missing some targets. | |
| 3183 // (5) Assert for insane oop offsets in debug mode. | |
| 3184 | |
| 3185 bool Compile::final_graph_reshaping() { | |
| 3186 // an infinite loop may have been eliminated by the optimizer, | |
| 3187 // in which case the graph will be empty. | |
| 3188 if (root()->req() == 1) { | |
| 3189 record_method_not_compilable("trivial infinite loop"); | |
| 3190 return true; | |
| 3191 } | |
| 3192 | |
|
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|
3193 // Expensive nodes have their control input set to prevent the GVN |
|
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|
3194 // from freely commoning them. There's no GVN beyond this point so |
|
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|
3195 // no need to keep the control input. We want the expensive nodes to |
|
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|
3196 // be freely moved to the least frequent code path by gcm. |
|
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|
3197 assert(OptimizeExpensiveOps || expensive_count() == 0, "optimization off but list non empty?"); |
|
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|
3198 for (int i = 0; i < expensive_count(); i++) { |
|
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|
3199 _expensive_nodes->at(i)->set_req(0, NULL); |
|
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|
3200 } |
|
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|
3201 |
|
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|
3202 Final_Reshape_Counts frc; |
| 0 | 3203 |
| 3204 // Visit everybody reachable! | |
| 3205 // Allocate stack of size C->unique()/2 to avoid frequent realloc | |
| 3206 Node_Stack nstack(unique() >> 1); | |
|
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|
3207 final_graph_reshaping_walk(nstack, root(), frc); |
| 0 | 3208 |
| 3209 // Check for unreachable (from below) code (i.e., infinite loops). | |
|
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|
3210 for( uint i = 0; i < frc._tests.size(); i++ ) { |
|
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|
3211 MultiBranchNode *n = frc._tests[i]->as_MultiBranch(); |
| 127 | 3212 // Get number of CFG targets. |
| 0 | 3213 // Note that PCTables include exception targets after calls. |
| 127 | 3214 uint required_outcnt = n->required_outcnt(); |
| 3215 if (n->outcnt() != required_outcnt) { | |
| 0 | 3216 // Check for a few special cases. Rethrow Nodes never take the |
| 3217 // 'fall-thru' path, so expected kids is 1 less. | |
| 3218 if (n->is_PCTable() && n->in(0) && n->in(0)->in(0)) { | |
| 3219 if (n->in(0)->in(0)->is_Call()) { | |
| 3220 CallNode *call = n->in(0)->in(0)->as_Call(); | |
| 3221 if (call->entry_point() == OptoRuntime::rethrow_stub()) { | |
| 127 | 3222 required_outcnt--; // Rethrow always has 1 less kid |
| 0 | 3223 } else if (call->req() > TypeFunc::Parms && |
| 3224 call->is_CallDynamicJava()) { | |
| 3225 // Check for null receiver. In such case, the optimizer has | |
| 3226 // detected that the virtual call will always result in a null | |
| 3227 // pointer exception. The fall-through projection of this CatchNode | |
| 3228 // will not be populated. | |
| 3229 Node *arg0 = call->in(TypeFunc::Parms); | |
| 3230 if (arg0->is_Type() && | |
| 3231 arg0->as_Type()->type()->higher_equal(TypePtr::NULL_PTR)) { | |
| 127 | 3232 required_outcnt--; |
| 0 | 3233 } |
| 3234 } else if (call->entry_point() == OptoRuntime::new_array_Java() && | |
| 3235 call->req() > TypeFunc::Parms+1 && | |
| 3236 call->is_CallStaticJava()) { | |
| 3237 // Check for negative array length. In such case, the optimizer has | |
| 3238 // detected that the allocation attempt will always result in an | |
| 3239 // exception. There is no fall-through projection of this CatchNode . | |
| 3240 Node *arg1 = call->in(TypeFunc::Parms+1); | |
| 3241 if (arg1->is_Type() && | |
| 3242 arg1->as_Type()->type()->join(TypeInt::POS)->empty()) { | |
| 127 | 3243 required_outcnt--; |
| 0 | 3244 } |
| 3245 } | |
| 3246 } | |
| 3247 } | |
| 127 | 3248 // Recheck with a better notion of 'required_outcnt' |
| 3249 if (n->outcnt() != required_outcnt) { | |
| 0 | 3250 record_method_not_compilable("malformed control flow"); |
| 3251 return true; // Not all targets reachable! | |
| 3252 } | |
| 3253 } | |
| 3254 // Check that I actually visited all kids. Unreached kids | |
| 3255 // must be infinite loops. | |
| 3256 for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) | |
|
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|
3257 if (!frc._visited.test(n->fast_out(j)->_idx)) { |
| 0 | 3258 record_method_not_compilable("infinite loop"); |
| 3259 return true; // Found unvisited kid; must be unreach | |
| 3260 } | |
| 3261 } | |
| 3262 | |
| 3263 // If original bytecodes contained a mixture of floats and doubles | |
| 3264 // check if the optimizer has made it homogenous, item (3). | |
|
929
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|
3265 if( Use24BitFPMode && Use24BitFP && UseSSE == 0 && |
|
859
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|
3266 frc.get_float_count() > 32 && |
|
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|
3267 frc.get_double_count() == 0 && |
|
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|
3268 (10 * frc.get_call_count() < frc.get_float_count()) ) { |
| 0 | 3269 set_24_bit_selection_and_mode( false, true ); |
| 3270 } | |
| 3271 | |
|
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|
3272 set_java_calls(frc.get_java_call_count()); |
|
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|
3273 set_inner_loops(frc.get_inner_loop_count()); |
| 0 | 3274 |
| 3275 // No infinite loops, no reason to bail out. | |
| 3276 return false; | |
| 3277 } | |
| 3278 | |
| 3279 //-----------------------------too_many_traps---------------------------------- | |
| 3280 // Report if there are too many traps at the current method and bci. | |
| 3281 // Return true if there was a trap, and/or PerMethodTrapLimit is exceeded. | |
| 3282 bool Compile::too_many_traps(ciMethod* method, | |
| 3283 int bci, | |
| 3284 Deoptimization::DeoptReason reason) { | |
| 3285 ciMethodData* md = method->method_data(); | |
| 3286 if (md->is_empty()) { | |
| 3287 // Assume the trap has not occurred, or that it occurred only | |
| 3288 // because of a transient condition during start-up in the interpreter. | |
| 3289 return false; | |
| 3290 } | |
| 3291 if (md->has_trap_at(bci, reason) != 0) { | |
| 3292 // Assume PerBytecodeTrapLimit==0, for a more conservative heuristic. | |
| 3293 // Also, if there are multiple reasons, or if there is no per-BCI record, | |
| 3294 // assume the worst. | |
| 3295 if (log()) | |
| 3296 log()->elem("observe trap='%s' count='%d'", | |
| 3297 Deoptimization::trap_reason_name(reason), | |
| 3298 md->trap_count(reason)); | |
| 3299 return true; | |
| 3300 } else { | |
| 3301 // Ignore method/bci and see if there have been too many globally. | |
| 3302 return too_many_traps(reason, md); | |
| 3303 } | |
| 3304 } | |
| 3305 | |
| 3306 // Less-accurate variant which does not require a method and bci. | |
| 3307 bool Compile::too_many_traps(Deoptimization::DeoptReason reason, | |
| 3308 ciMethodData* logmd) { | |
| 3309 if (trap_count(reason) >= (uint)PerMethodTrapLimit) { | |
| 3310 // Too many traps globally. | |
| 3311 // Note that we use cumulative trap_count, not just md->trap_count. | |
| 3312 if (log()) { | |
| 3313 int mcount = (logmd == NULL)? -1: (int)logmd->trap_count(reason); | |
| 3314 log()->elem("observe trap='%s' count='0' mcount='%d' ccount='%d'", | |
| 3315 Deoptimization::trap_reason_name(reason), | |
| 3316 mcount, trap_count(reason)); | |
| 3317 } | |
| 3318 return true; | |
| 3319 } else { | |
| 3320 // The coast is clear. | |
| 3321 return false; | |
| 3322 } | |
| 3323 } | |
| 3324 | |
| 3325 //--------------------------too_many_recompiles-------------------------------- | |
| 3326 // Report if there are too many recompiles at the current method and bci. | |
| 3327 // Consults PerBytecodeRecompilationCutoff and PerMethodRecompilationCutoff. | |
| 3328 // Is not eager to return true, since this will cause the compiler to use | |
| 3329 // Action_none for a trap point, to avoid too many recompilations. | |
| 3330 bool Compile::too_many_recompiles(ciMethod* method, | |
| 3331 int bci, | |
| 3332 Deoptimization::DeoptReason reason) { | |
| 3333 ciMethodData* md = method->method_data(); | |
| 3334 if (md->is_empty()) { | |
| 3335 // Assume the trap has not occurred, or that it occurred only | |
| 3336 // because of a transient condition during start-up in the interpreter. | |
| 3337 return false; | |
| 3338 } | |
| 3339 // Pick a cutoff point well within PerBytecodeRecompilationCutoff. | |
| 3340 uint bc_cutoff = (uint) PerBytecodeRecompilationCutoff / 8; | |
| 3341 uint m_cutoff = (uint) PerMethodRecompilationCutoff / 2 + 1; // not zero | |
| 3342 Deoptimization::DeoptReason per_bc_reason | |
| 3343 = Deoptimization::reason_recorded_per_bytecode_if_any(reason); | |
| 3344 if ((per_bc_reason == Deoptimization::Reason_none | |
| 3345 || md->has_trap_at(bci, reason) != 0) | |
| 3346 // The trap frequency measure we care about is the recompile count: | |
| 3347 && md->trap_recompiled_at(bci) | |
| 3348 && md->overflow_recompile_count() >= bc_cutoff) { | |
| 3349 // Do not emit a trap here if it has already caused recompilations. | |
| 3350 // Also, if there are multiple reasons, or if there is no per-BCI record, | |
| 3351 // assume the worst. | |
| 3352 if (log()) | |
| 3353 log()->elem("observe trap='%s recompiled' count='%d' recompiles2='%d'", | |
| 3354 Deoptimization::trap_reason_name(reason), | |
| 3355 md->trap_count(reason), | |
| 3356 md->overflow_recompile_count()); | |
| 3357 return true; | |
| 3358 } else if (trap_count(reason) != 0 | |
| 3359 && decompile_count() >= m_cutoff) { | |
| 3360 // Too many recompiles globally, and we have seen this sort of trap. | |
| 3361 // Use cumulative decompile_count, not just md->decompile_count. | |
| 3362 if (log()) | |
| 3363 log()->elem("observe trap='%s' count='%d' mcount='%d' decompiles='%d' mdecompiles='%d'", | |
| 3364 Deoptimization::trap_reason_name(reason), | |
| 3365 md->trap_count(reason), trap_count(reason), | |
| 3366 md->decompile_count(), decompile_count()); | |
| 3367 return true; | |
| 3368 } else { | |
| 3369 // The coast is clear. | |
| 3370 return false; | |
| 3371 } | |
| 3372 } | |
| 3373 | |
|
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|
3374 // Compute when not to trap. Used by matching trap based nodes and |
|
41b780b43b74
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parents:
14438
diff
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|
3375 // NullCheck optimization. |
|
41b780b43b74
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14438
diff
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|
3376 void Compile::set_allowed_deopt_reasons() { |
|
41b780b43b74
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diff
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|
3377 _allowed_reasons = 0; |
|
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8029015: PPC64 (part 216): opto: trap based null and range checks
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diff
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|
3378 if (is_method_compilation()) { |
|
41b780b43b74
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diff
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|
3379 for (int rs = (int)Deoptimization::Reason_none+1; rs < Compile::trapHistLength; rs++) { |
|
41b780b43b74
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|
3380 assert(rs < BitsPerInt, "recode bit map"); |
|
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|
3381 if (!too_many_traps((Deoptimization::DeoptReason) rs)) { |
|
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|
3382 _allowed_reasons |= nth_bit(rs); |
|
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diff
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|
3383 } |
|
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|
3384 } |
|
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|
3385 } |
|
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|
3386 } |
| 0 | 3387 |
| 3388 #ifndef PRODUCT | |
| 3389 //------------------------------verify_graph_edges--------------------------- | |
| 3390 // Walk the Graph and verify that there is a one-to-one correspondence | |
| 3391 // between Use-Def edges and Def-Use edges in the graph. | |
| 3392 void Compile::verify_graph_edges(bool no_dead_code) { | |
| 3393 if (VerifyGraphEdges) { | |
| 3394 ResourceArea *area = Thread::current()->resource_area(); | |
| 3395 Unique_Node_List visited(area); | |
| 3396 // Call recursive graph walk to check edges | |
| 3397 _root->verify_edges(visited); | |
| 3398 if (no_dead_code) { | |
| 3399 // Now make sure that no visited node is used by an unvisited node. | |
| 3400 bool dead_nodes = 0; | |
| 3401 Unique_Node_List checked(area); | |
| 3402 while (visited.size() > 0) { | |
| 3403 Node* n = visited.pop(); | |
| 3404 checked.push(n); | |
| 3405 for (uint i = 0; i < n->outcnt(); i++) { | |
| 3406 Node* use = n->raw_out(i); | |
| 3407 if (checked.member(use)) continue; // already checked | |
| 3408 if (visited.member(use)) continue; // already in the graph | |
| 3409 if (use->is_Con()) continue; // a dead ConNode is OK | |
| 3410 // At this point, we have found a dead node which is DU-reachable. | |
| 3411 if (dead_nodes++ == 0) | |
| 3412 tty->print_cr("*** Dead nodes reachable via DU edges:"); | |
| 3413 use->dump(2); | |
| 3414 tty->print_cr("---"); | |
| 3415 checked.push(use); // No repeats; pretend it is now checked. | |
| 3416 } | |
| 3417 } | |
| 3418 assert(dead_nodes == 0, "using nodes must be reachable from root"); | |
| 3419 } | |
| 3420 } | |
| 3421 } | |
|
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|
3422 |
|
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|
3423 // Verify GC barriers consistency |
|
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|
3424 // Currently supported: |
|
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diff
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|
3425 // - G1 pre-barriers (see GraphKit::g1_write_barrier_pre()) |
|
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|
3426 void Compile::verify_barriers() { |
|
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|
3427 if (UseG1GC) { |
|
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|
3428 // Verify G1 pre-barriers |
|
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8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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|
3429 const int marking_offset = in_bytes(JavaThread::satb_mark_queue_offset() + PtrQueue::byte_offset_of_active()); |
|
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|
3430 |
|
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|
3431 ResourceArea *area = Thread::current()->resource_area(); |
|
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|
3432 Unique_Node_List visited(area); |
|
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|
3433 Node_List worklist(area); |
|
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|
3434 // We're going to walk control flow backwards starting from the Root |
|
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|
3435 worklist.push(_root); |
|
94a83e0f9ce1
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diff
changeset
|
3436 while (worklist.size() > 0) { |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3437 Node* x = worklist.pop(); |
|
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8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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diff
changeset
|
3438 if (x == NULL || x == top()) continue; |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3439 if (visited.member(x)) { |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3440 continue; |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3441 } else { |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3442 visited.push(x); |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
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12966
diff
changeset
|
3443 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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parents:
12966
diff
changeset
|
3444 |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3445 if (x->is_Region()) { |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3446 for (uint i = 1; i < x->req(); i++) { |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3447 worklist.push(x->in(i)); |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3448 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3449 } else { |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3450 worklist.push(x->in(0)); |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3451 // We are looking for the pattern: |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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changeset
|
3452 // /->ThreadLocal |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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diff
changeset
|
3453 // If->Bool->CmpI->LoadB->AddP->ConL(marking_offset) |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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diff
changeset
|
3454 // \->ConI(0) |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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diff
changeset
|
3455 // We want to verify that the If and the LoadB have the same control |
|
94a83e0f9ce1
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12966
diff
changeset
|
3456 // See GraphKit::g1_write_barrier_pre() |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3457 if (x->is_If()) { |
|
94a83e0f9ce1
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12966
diff
changeset
|
3458 IfNode *iff = x->as_If(); |
|
94a83e0f9ce1
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12966
diff
changeset
|
3459 if (iff->in(1)->is_Bool() && iff->in(1)->in(1)->is_Cmp()) { |
|
94a83e0f9ce1
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diff
changeset
|
3460 CmpNode *cmp = iff->in(1)->in(1)->as_Cmp(); |
|
94a83e0f9ce1
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changeset
|
3461 if (cmp->Opcode() == Op_CmpI && cmp->in(2)->is_Con() && cmp->in(2)->bottom_type()->is_int()->get_con() == 0 |
|
94a83e0f9ce1
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diff
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|
3462 && cmp->in(1)->is_Load()) { |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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diff
changeset
|
3463 LoadNode* load = cmp->in(1)->as_Load(); |
|
94a83e0f9ce1
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changeset
|
3464 if (load->Opcode() == Op_LoadB && load->in(2)->is_AddP() && load->in(2)->in(2)->Opcode() == Op_ThreadLocal |
|
94a83e0f9ce1
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changeset
|
3465 && load->in(2)->in(3)->is_Con() |
|
94a83e0f9ce1
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diff
changeset
|
3466 && load->in(2)->in(3)->bottom_type()->is_intptr_t()->get_con() == marking_offset) { |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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parents:
12966
diff
changeset
|
3467 |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3468 Node* if_ctrl = iff->in(0); |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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parents:
12966
diff
changeset
|
3469 Node* load_ctrl = load->in(0); |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3470 |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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12966
diff
changeset
|
3471 if (if_ctrl != load_ctrl) { |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3472 // Skip possible CProj->NeverBranch in infinite loops |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
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parents:
12966
diff
changeset
|
3473 if ((if_ctrl->is_Proj() && if_ctrl->Opcode() == Op_CProj) |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3474 && (if_ctrl->in(0)->is_MultiBranch() && if_ctrl->in(0)->Opcode() == Op_NeverBranch)) { |
|
94a83e0f9ce1
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parents:
12966
diff
changeset
|
3475 if_ctrl = if_ctrl->in(0)->in(0); |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3476 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3477 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3478 assert(load_ctrl != NULL && if_ctrl == load_ctrl, "controls must match"); |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3479 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3480 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3481 } |
|
94a83e0f9ce1
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iveresov
parents:
12966
diff
changeset
|
3482 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3483 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3484 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3485 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3486 } |
|
94a83e0f9ce1
8017065: C2 allows safepoint checks to leak into G1 pre-barriers
iveresov
parents:
12966
diff
changeset
|
3487 |
| 0 | 3488 #endif |
| 3489 | |
| 3490 // The Compile object keeps track of failure reasons separately from the ciEnv. | |
| 3491 // This is required because there is not quite a 1-1 relation between the | |
| 3492 // ciEnv and its compilation task and the Compile object. Note that one | |
| 3493 // ciEnv might use two Compile objects, if C2Compiler::compile_method decides | |
| 3494 // to backtrack and retry without subsuming loads. Other than this backtracking | |
| 3495 // behavior, the Compile's failure reason is quietly copied up to the ciEnv | |
| 3496 // by the logic in C2Compiler. | |
| 3497 void Compile::record_failure(const char* reason) { | |
| 3498 if (log() != NULL) { | |
| 3499 log()->elem("failure reason='%s' phase='compile'", reason); | |
| 3500 } | |
| 3501 if (_failure_reason == NULL) { | |
| 3502 // Record the first failure reason. | |
| 3503 _failure_reason = reason; | |
| 3504 } | |
| 10405 | 3505 |
| 3506 EventCompilerFailure event; | |
| 3507 if (event.should_commit()) { | |
| 3508 event.set_compileID(Compile::compile_id()); | |
| 3509 event.set_failure(reason); | |
| 3510 event.commit(); | |
| 3511 } | |
| 3512 | |
| 222 | 3513 if (!C->failure_reason_is(C2Compiler::retry_no_subsuming_loads())) { |
| 10405 | 3514 C->print_method(PHASE_FAILURE); |
| 222 | 3515 } |
| 0 | 3516 _root = NULL; // flush the graph, too |
| 3517 } | |
| 3518 | |
| 3519 Compile::TracePhase::TracePhase(const char* name, elapsedTimer* accumulator, bool dolog) | |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3520 : TraceTime(NULL, accumulator, false NOT_PRODUCT( || TimeCompiler ), false), |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3521 _phase_name(name), _dolog(dolog) |
| 0 | 3522 { |
| 3523 if (dolog) { | |
| 3524 C = Compile::current(); | |
| 3525 _log = C->log(); | |
| 3526 } else { | |
| 3527 C = NULL; | |
| 3528 _log = NULL; | |
| 3529 } | |
| 3530 if (_log != NULL) { | |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3531 _log->begin_head("phase name='%s' nodes='%d' live='%d'", _phase_name, C->unique(), C->live_nodes()); |
| 0 | 3532 _log->stamp(); |
| 3533 _log->end_head(); | |
| 3534 } | |
| 3535 } | |
| 3536 | |
| 3537 Compile::TracePhase::~TracePhase() { | |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3538 |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3539 C = Compile::current(); |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3540 if (_dolog) { |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3541 _log = C->log(); |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3542 } else { |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3543 _log = NULL; |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3544 } |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3545 |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3546 #ifdef ASSERT |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3547 if (PrintIdealNodeCount) { |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3548 tty->print_cr("phase name='%s' nodes='%d' live='%d' live_graph_walk='%d'", |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3549 _phase_name, C->unique(), C->live_nodes(), C->count_live_nodes_by_graph_walk()); |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3550 } |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3551 |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3552 if (VerifyIdealNodeCount) { |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3553 Compile::current()->print_missing_nodes(); |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3554 } |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3555 #endif |
|
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3556 |
| 0 | 3557 if (_log != NULL) { |
|
7196
2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents:
6888
diff
changeset
|
3558 _log->done("phase name='%s' nodes='%d' live='%d'", _phase_name, C->unique(), C->live_nodes()); |
| 0 | 3559 } |
| 3560 } | |
| 2008 | 3561 |
| 3562 //============================================================================= | |
| 3563 // Two Constant's are equal when the type and the value are equal. | |
| 3564 bool Compile::Constant::operator==(const Constant& other) { | |
| 3565 if (type() != other.type() ) return false; | |
| 3566 if (can_be_reused() != other.can_be_reused()) return false; | |
| 3567 // For floating point values we compare the bit pattern. | |
| 3568 switch (type()) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3569 case T_FLOAT: return (_v._value.i == other._v._value.i); |
| 2008 | 3570 case T_LONG: |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3571 case T_DOUBLE: return (_v._value.j == other._v._value.j); |
| 2008 | 3572 case T_OBJECT: |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3573 case T_ADDRESS: return (_v._value.l == other._v._value.l); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3574 case T_VOID: return (_v._value.l == other._v._value.l); // jump-table entries |
|
6888
cfe522e6461c
8000623: tools/javac/Diagnostics/6769027/T6769027.java crashes in PSPromotionManager::copy_to_survivor_space
kvn
parents:
6849
diff
changeset
|
3575 case T_METADATA: return (_v._metadata == other._v._metadata); |
| 2008 | 3576 default: ShouldNotReachHere(); |
| 3577 } | |
| 3578 return false; | |
| 3579 } | |
| 3580 | |
| 3581 static int type_to_size_in_bytes(BasicType t) { | |
| 3582 switch (t) { | |
| 3583 case T_LONG: return sizeof(jlong ); | |
| 3584 case T_FLOAT: return sizeof(jfloat ); | |
| 3585 case T_DOUBLE: return sizeof(jdouble); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6619
diff
changeset
|
3586 case T_METADATA: return sizeof(Metadata*); |
| 2008 | 3587 // 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
|
3588 // need an internal word relocation. |
| 2008 | 3589 case T_VOID: |
| 3590 case T_ADDRESS: | |
| 3591 case T_OBJECT: return sizeof(jobject); | |
| 3592 } | |
| 3593 | |
| 3594 ShouldNotReachHere(); | |
| 3595 return -1; | |
| 3596 } | |
| 3597 | |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3598 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
|
3599 // sort descending |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3600 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
|
3601 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
|
3602 return 0; |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3603 } |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3604 |
| 2008 | 3605 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
|
3606 // First, sort the array by frequencies. |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3607 _constants.sort(qsort_comparator); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3608 |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3609 #ifdef ASSERT |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3610 // 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
|
3611 // array (they have a negative frequency). |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3612 bool found_void = false; |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3613 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
|
3614 Constant con = _constants.at(i); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3615 if (con.type() == T_VOID) |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3616 found_void = true; // jump-tables |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3617 else |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3618 assert(!found_void, "wrong sorting"); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3619 } |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3620 #endif |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3621 |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3622 int offset = 0; |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3623 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
|
3624 Constant* con = _constants.adr_at(i); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3625 |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3626 // Align offset for type. |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3627 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
|
3628 offset = align_size_up(offset, typesize); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3629 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
|
3630 |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3631 if (con->type() == T_VOID) { |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3632 MachConstantNode* n = (MachConstantNode*) con->get_jobject(); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3633 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
|
3634 } else { |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3635 offset = offset + typesize; |
| 2008 | 3636 } |
| 3637 } | |
| 3638 | |
| 3639 // Align size up to the next section start (which is insts; see | |
| 3640 // CodeBuffer::align_at_start). | |
| 3641 assert(_size == -1, "already set?"); | |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3642 _size = align_size_up(offset, CodeEntryAlignment); |
| 2008 | 3643 } |
| 3644 | |
| 3645 void Compile::ConstantTable::emit(CodeBuffer& cb) { | |
| 3646 MacroAssembler _masm(&cb); | |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3647 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
|
3648 Constant con = _constants.at(i); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3649 address constant_addr; |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3650 switch (con.type()) { |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3651 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
|
3652 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
|
3653 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
|
3654 case T_OBJECT: { |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3655 jobject obj = con.get_jobject(); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3656 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
|
3657 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
|
3658 break; |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3659 } |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3660 case T_ADDRESS: { |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3661 address addr = (address) con.get_jobject(); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3662 constant_addr = _masm.address_constant(addr); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3663 break; |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3664 } |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3665 // 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
|
3666 // need an internal word relocation. |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3667 case T_VOID: { |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3668 MachConstantNode* n = (MachConstantNode*) con.get_jobject(); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3669 // 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
|
3670 // 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
|
3671 address dummy = (address) n; |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3672 constant_addr = _masm.address_constant(dummy); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3673 // Expand jump-table |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3674 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
|
3675 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
|
3676 assert(temp_addr, "consts section too small"); |
| 2008 | 3677 } |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3678 break; |
| 2008 | 3679 } |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3680 case T_METADATA: { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3681 Metadata* obj = con.get_metadata(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3682 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
|
3683 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
|
3684 break; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3685 } |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3686 default: ShouldNotReachHere(); |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3687 } |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3688 assert(constant_addr, "consts section too small"); |
|
6268
6c5b7a6becc8
7187454: stack overflow in C2 compiler thread on Solaris x86
kvn
parents:
6179
diff
changeset
|
3689 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 | 3690 } |
| 3691 } | |
| 3692 | |
| 3693 int Compile::ConstantTable::find_offset(Constant& con) const { | |
| 3694 int idx = _constants.find(con); | |
| 3695 assert(idx != -1, "constant must be in constant table"); | |
| 3696 int offset = _constants.at(idx).offset(); | |
| 3697 assert(offset != -1, "constant table not emitted yet?"); | |
| 3698 return offset; | |
| 3699 } | |
| 3700 | |
| 3701 void Compile::ConstantTable::add(Constant& con) { | |
| 3702 if (con.can_be_reused()) { | |
| 3703 int idx = _constants.find(con); | |
| 3704 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
|
3705 _constants.adr_at(idx)->inc_freq(con.freq()); // increase the frequency by the current value |
| 2008 | 3706 return; |
| 3707 } | |
| 3708 } | |
| 3709 (void) _constants.append(con); | |
| 3710 } | |
| 3711 | |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3712 Compile::Constant Compile::ConstantTable::add(MachConstantNode* n, BasicType type, jvalue value) { |
|
12023
d1034bd8cefc
8022284: Hide internal data structure in PhaseCFG
adlertz
parents:
10405
diff
changeset
|
3713 Block* b = Compile::current()->cfg()->get_block_for_node(n); |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3714 Constant con(type, value, b->_freq); |
| 2008 | 3715 add(con); |
| 3716 return con; | |
| 3717 } | |
| 3718 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3719 Compile::Constant Compile::ConstantTable::add(Metadata* metadata) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3720 Constant con(metadata); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3721 add(con); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3722 return con; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3723 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3724 |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3725 Compile::Constant Compile::ConstantTable::add(MachConstantNode* n, MachOper* oper) { |
| 2008 | 3726 jvalue value; |
| 3727 BasicType type = oper->type()->basic_type(); | |
| 3728 switch (type) { | |
| 3729 case T_LONG: value.j = oper->constantL(); break; | |
| 3730 case T_FLOAT: value.f = oper->constantF(); break; | |
| 3731 case T_DOUBLE: value.d = oper->constantD(); break; | |
| 3732 case T_OBJECT: | |
| 3733 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
|
3734 case T_METADATA: return add((Metadata*)oper->constant()); break; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6619
diff
changeset
|
3735 default: guarantee(false, err_msg_res("unhandled type: %s", type2name(type))); |
| 2008 | 3736 } |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3737 return add(n, type, value); |
| 2008 | 3738 } |
| 3739 | |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3740 Compile::Constant Compile::ConstantTable::add_jump_table(MachConstantNode* n) { |
| 2008 | 3741 jvalue value; |
| 3742 // We can use the node pointer here to identify the right jump-table | |
| 3743 // as this method is called from Compile::Fill_buffer right before | |
| 3744 // the MachNodes are emitted and the jump-table is filled (means the | |
| 3745 // MachNode pointers do not change anymore). | |
| 3746 value.l = (jobject) n; | |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3747 Constant con(T_VOID, value, next_jump_table_freq(), false); // Labels of a jump-table cannot be reused. |
|
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3748 add(con); |
| 2008 | 3749 return con; |
| 3750 } | |
| 3751 | |
| 3752 void Compile::ConstantTable::fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray<Label*> labels) const { | |
| 3753 // If called from Compile::scratch_emit_size do nothing. | |
| 3754 if (Compile::current()->in_scratch_emit_size()) return; | |
| 3755 | |
| 3756 assert(labels.is_nonempty(), "must be"); | |
|
6268
6c5b7a6becc8
7187454: stack overflow in C2 compiler thread on Solaris x86
kvn
parents:
6179
diff
changeset
|
3757 assert((uint) labels.length() == n->outcnt(), err_msg_res("must be equal: %d == %d", labels.length(), n->outcnt())); |
| 2008 | 3758 |
| 3759 // Since MachConstantNode::constant_offset() also contains | |
| 3760 // table_base_offset() we need to subtract the table_base_offset() | |
| 3761 // to get the plain offset into the constant table. | |
| 3762 int offset = n->constant_offset() - table_base_offset(); | |
| 3763 | |
| 3764 MacroAssembler _masm(&cb); | |
| 3765 address* jump_table_base = (address*) (_masm.code()->consts()->start() + offset); | |
| 3766 | |
|
4114
6729bbc1fcd6
7003454: order constants in constant table by number of references in code
twisti
parents:
4064
diff
changeset
|
3767 for (uint i = 0; i < n->outcnt(); i++) { |
| 2008 | 3768 address* constant_addr = &jump_table_base[i]; |
|
6268
6c5b7a6becc8
7187454: stack overflow in C2 compiler thread on Solaris x86
kvn
parents:
6179
diff
changeset
|
3769 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 | 3770 *constant_addr = cb.consts()->target(*labels.at(i), (address) constant_addr); |
| 3771 cb.consts()->relocate((address) constant_addr, relocInfo::internal_word_type); | |
| 3772 } | |
| 3773 } | |
|
7421
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
parents:
7199
diff
changeset
|
3774 |
|
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
parents:
7199
diff
changeset
|
3775 void Compile::dump_inlining() { |
| 12295 | 3776 if (print_inlining() || print_intrinsics()) { |
| 7473 | 3777 // Print inlining message for candidates that we couldn't inline |
| 3778 // for lack of space or non constant receiver | |
| 3779 for (int i = 0; i < _late_inlines.length(); i++) { | |
| 3780 CallGenerator* cg = _late_inlines.at(i); | |
| 3781 cg->print_inlining_late("live nodes > LiveNodeCountInliningCutoff"); | |
| 3782 } | |
| 3783 Unique_Node_List useful; | |
| 3784 useful.push(root()); | |
| 3785 for (uint next = 0; next < useful.size(); ++next) { | |
| 3786 Node* n = useful.at(next); | |
| 3787 if (n->is_Call() && n->as_Call()->generator() != NULL && n->as_Call()->generator()->call_node() == n) { | |
| 3788 CallNode* call = n->as_Call(); | |
| 3789 CallGenerator* cg = call->generator(); | |
| 3790 cg->print_inlining_late("receiver not constant"); | |
| 3791 } | |
| 3792 uint max = n->len(); | |
| 3793 for ( uint i = 0; i < max; ++i ) { | |
| 3794 Node *m = n->in(i); | |
| 3795 if ( m == NULL ) continue; | |
| 3796 useful.push(m); | |
| 3797 } | |
| 3798 } | |
|
7421
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
parents:
7199
diff
changeset
|
3799 for (int i = 0; i < _print_inlining_list->length(); i++) { |
| 12295 | 3800 tty->print(_print_inlining_list->adr_at(i)->ss()->as_string()); |
|
7421
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
parents:
7199
diff
changeset
|
3801 } |
|
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
parents:
7199
diff
changeset
|
3802 } |
|
ad5dd04754ee
8005031: Some cleanup in c2 to prepare for incremental inlining support
roland
parents:
7199
diff
changeset
|
3803 } |
|
8048
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3804 |
| 17622 | 3805 // Dump inlining replay data to the stream. |
| 3806 // Don't change thread state and acquire any locks. | |
| 3807 void Compile::dump_inline_data(outputStream* out) { | |
| 3808 InlineTree* inl_tree = ilt(); | |
| 3809 if (inl_tree != NULL) { | |
| 3810 out->print(" inline %d", inl_tree->count()); | |
| 3811 inl_tree->dump_replay_data(out); | |
| 3812 } | |
| 3813 } | |
| 3814 | |
|
8048
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
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parents:
7605
diff
changeset
|
3815 int Compile::cmp_expensive_nodes(Node* n1, Node* n2) { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3816 if (n1->Opcode() < n2->Opcode()) return -1; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3817 else if (n1->Opcode() > n2->Opcode()) return 1; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3818 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3819 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
|
3820 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
|
3821 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
|
3822 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
|
3823 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3824 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3825 return 0; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3826 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3827 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3828 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
|
3829 Node* n1 = *n1p; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3830 Node* n2 = *n2p; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3831 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3832 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
|
3833 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3834 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3835 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
|
3836 if (!expensive_nodes_sorted()) { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3837 _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
|
3838 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3839 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3840 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3841 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
|
3842 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
|
3843 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
|
3844 return false; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3845 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3846 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3847 return true; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3848 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3849 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3850 bool Compile::should_optimize_expensive_nodes(PhaseIterGVN &igvn) { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3851 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
|
3852 return false; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3853 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3854 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3855 assert(OptimizeExpensiveOps, "optimization off?"); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3856 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3857 // Take this opportunity to remove dead nodes from the list |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3858 int j = 0; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3859 for (int i = 0; i < _expensive_nodes->length(); i++) { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3860 Node* n = _expensive_nodes->at(i); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3861 if (!n->is_unreachable(igvn)) { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3862 assert(n->is_expensive(), "should be expensive"); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3863 _expensive_nodes->at_put(j, n); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3864 j++; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3865 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3866 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3867 _expensive_nodes->trunc_to(j); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3868 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3869 // Then sort the list so that similar nodes are next to each other |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3870 // and check for at least two nodes of identical kind with same data |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3871 // inputs. |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3872 sort_expensive_nodes(); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3873 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3874 for (int i = 0; i < _expensive_nodes->length()-1; i++) { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3875 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
|
3876 return true; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3877 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3878 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3879 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3880 return false; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3881 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3882 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3883 void Compile::cleanup_expensive_nodes(PhaseIterGVN &igvn) { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3884 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
|
3885 return; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3886 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3887 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3888 assert(OptimizeExpensiveOps, "optimization off?"); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3889 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3890 // Sort to bring similar nodes next to each other and clear the |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3891 // control input of nodes for which there's only a single copy. |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3892 sort_expensive_nodes(); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3893 |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3894 int j = 0; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3895 int identical = 0; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3896 int i = 0; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3897 for (; i < _expensive_nodes->length()-1; i++) { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3898 assert(j <= i, "can't write beyond current index"); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3899 if (_expensive_nodes->at(i)->Opcode() == _expensive_nodes->at(i+1)->Opcode()) { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3900 identical++; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3901 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3902 continue; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3903 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3904 if (identical > 0) { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3905 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3906 identical = 0; |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3907 } else { |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3908 Node* n = _expensive_nodes->at(i); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3909 igvn.hash_delete(n); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3910 n->set_req(0, NULL); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3911 igvn.hash_insert(n); |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3912 } |
|
8b3da8d14c93
7197327: 40% regression on 8 b41 comp 8 b40 on specjvm2008.mpegaudio on oob
roland
parents:
7605
diff
changeset
|
3913 } |
|
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3914 if (identical > 0) { |
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3915 _expensive_nodes->at_put(j++, _expensive_nodes->at(i)); |
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3916 } else if (_expensive_nodes->length() >= 1) { |
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3917 Node* n = _expensive_nodes->at(i); |
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3918 igvn.hash_delete(n); |
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3919 n->set_req(0, NULL); |
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3920 igvn.hash_insert(n); |
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3921 } |
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3922 _expensive_nodes->trunc_to(j); |
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3923 } |
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3924 |
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3925 void Compile::add_expensive_node(Node * n) { |
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3926 assert(!_expensive_nodes->contains(n), "duplicate entry in expensive list"); |
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3927 assert(n->is_expensive(), "expensive nodes with non-null control here only"); |
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3928 assert(!n->is_CFG() && !n->is_Mem(), "no cfg or memory nodes here"); |
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3929 if (OptimizeExpensiveOps) { |
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3930 _expensive_nodes->append(n); |
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3931 } else { |
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3932 // Clear control input and let IGVN optimize expensive nodes if |
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3933 // OptimizeExpensiveOps is off. |
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3934 n->set_req(0, NULL); |
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3935 } |
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3936 } |
|
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3937 |
| 12966 | 3938 /** |
| 3939 * Remove the speculative part of types and clean up the graph | |
| 3940 */ | |
| 3941 void Compile::remove_speculative_types(PhaseIterGVN &igvn) { | |
| 3942 if (UseTypeSpeculation) { | |
| 3943 Unique_Node_List worklist; | |
| 3944 worklist.push(root()); | |
| 3945 int modified = 0; | |
| 3946 // Go over all type nodes that carry a speculative type, drop the | |
| 3947 // speculative part of the type and enqueue the node for an igvn | |
| 3948 // which may optimize it out. | |
| 3949 for (uint next = 0; next < worklist.size(); ++next) { | |
| 3950 Node *n = worklist.at(next); | |
| 3951 if (n->is_Type() && n->as_Type()->type()->isa_oopptr() != NULL && | |
| 3952 n->as_Type()->type()->is_oopptr()->speculative() != NULL) { | |
| 3953 TypeNode* tn = n->as_Type(); | |
| 3954 const TypeOopPtr* t = tn->type()->is_oopptr(); | |
| 3955 bool in_hash = igvn.hash_delete(n); | |
| 3956 assert(in_hash, "node should be in igvn hash table"); | |
| 3957 tn->set_type(t->remove_speculative()); | |
| 3958 igvn.hash_insert(n); | |
| 3959 igvn._worklist.push(n); // give it a chance to go away | |
| 3960 modified++; | |
| 3961 } | |
| 3962 uint max = n->len(); | |
| 3963 for( uint i = 0; i < max; ++i ) { | |
| 3964 Node *m = n->in(i); | |
| 3965 if (not_a_node(m)) continue; | |
| 3966 worklist.push(m); | |
| 3967 } | |
| 3968 } | |
| 3969 // Drop the speculative part of all types in the igvn's type table | |
| 3970 igvn.remove_speculative_types(); | |
| 3971 if (modified > 0) { | |
| 3972 igvn.optimize(); | |
| 3973 } | |
| 3974 } | |
| 3975 } | |
| 3976 | |
|
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3977 // Auxiliary method to support randomized stressing/fuzzing. |
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3978 // |
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3979 // This method can be called the arbitrary number of times, with current count |
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3980 // as the argument. The logic allows selecting a single candidate from the |
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3981 // running list of candidates as follows: |
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3982 // int count = 0; |
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3983 // Cand* selected = null; |
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3984 // while(cand = cand->next()) { |
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3985 // if (randomized_select(++count)) { |
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3986 // selected = cand; |
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3987 // } |
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3988 // } |
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3989 // |
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3990 // Including count equalizes the chances any candidate is "selected". |
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3991 // This is useful when we don't have the complete list of candidates to choose |
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3992 // from uniformly. In this case, we need to adjust the randomicity of the |
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3993 // selection, or else we will end up biasing the selection towards the latter |
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3994 // candidates. |
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3995 // |
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3996 // Quick back-envelope calculation shows that for the list of n candidates |
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3997 // the equal probability for the candidate to persist as "best" can be |
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3998 // achieved by replacing it with "next" k-th candidate with the probability |
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3999 // of 1/k. It can be easily shown that by the end of the run, the |
|
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4000 // probability for any candidate is converged to 1/n, thus giving the |
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4001 // uniform distribution among all the candidates. |
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4002 // |
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4003 // We don't care about the domain size as long as (RANDOMIZED_DOMAIN / count) is large. |
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4004 #define RANDOMIZED_DOMAIN_POW 29 |
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4005 #define RANDOMIZED_DOMAIN (1 << RANDOMIZED_DOMAIN_POW) |
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4006 #define RANDOMIZED_DOMAIN_MASK ((1 << (RANDOMIZED_DOMAIN_POW + 1)) - 1) |
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4007 bool Compile::randomized_select(int count) { |
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4008 assert(count > 0, "only positive"); |
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4009 return (os::random() & RANDOMIZED_DOMAIN_MASK) < (RANDOMIZED_DOMAIN / count); |
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4010 } |