Mercurial > hg > truffle
annotate src/share/vm/opto/compile.cpp @ 1575:3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
Summary: Hoist DecodeN instruction above null check
Reviewed-by: never, twisti
| author | kvn |
|---|---|
| date | Wed, 02 Jun 2010 09:49:32 -0700 |
| parents | b4776199210f |
| children | e9ff18c4ace7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1265 | 2 * Copyright 1997-2010 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_compile.cpp.incl" | |
| 27 | |
| 28 /// Support for intrinsics. | |
| 29 | |
| 30 // Return the index at which m must be inserted (or already exists). | |
| 31 // The sort order is by the address of the ciMethod, with is_virtual as minor key. | |
| 32 int Compile::intrinsic_insertion_index(ciMethod* m, bool is_virtual) { | |
| 33 #ifdef ASSERT | |
| 34 for (int i = 1; i < _intrinsics->length(); i++) { | |
| 35 CallGenerator* cg1 = _intrinsics->at(i-1); | |
| 36 CallGenerator* cg2 = _intrinsics->at(i); | |
| 37 assert(cg1->method() != cg2->method() | |
| 38 ? cg1->method() < cg2->method() | |
| 39 : cg1->is_virtual() < cg2->is_virtual(), | |
| 40 "compiler intrinsics list must stay sorted"); | |
| 41 } | |
| 42 #endif | |
| 43 // Binary search sorted list, in decreasing intervals [lo, hi]. | |
| 44 int lo = 0, hi = _intrinsics->length()-1; | |
| 45 while (lo <= hi) { | |
| 46 int mid = (uint)(hi + lo) / 2; | |
| 47 ciMethod* mid_m = _intrinsics->at(mid)->method(); | |
| 48 if (m < mid_m) { | |
| 49 hi = mid-1; | |
| 50 } else if (m > mid_m) { | |
| 51 lo = mid+1; | |
| 52 } else { | |
| 53 // look at minor sort key | |
| 54 bool mid_virt = _intrinsics->at(mid)->is_virtual(); | |
| 55 if (is_virtual < mid_virt) { | |
| 56 hi = mid-1; | |
| 57 } else if (is_virtual > mid_virt) { | |
| 58 lo = mid+1; | |
| 59 } else { | |
| 60 return mid; // exact match | |
| 61 } | |
| 62 } | |
| 63 } | |
| 64 return lo; // inexact match | |
| 65 } | |
| 66 | |
| 67 void Compile::register_intrinsic(CallGenerator* cg) { | |
| 68 if (_intrinsics == NULL) { | |
| 69 _intrinsics = new GrowableArray<CallGenerator*>(60); | |
| 70 } | |
| 71 // This code is stolen from ciObjectFactory::insert. | |
| 72 // Really, GrowableArray should have methods for | |
| 73 // insert_at, remove_at, and binary_search. | |
| 74 int len = _intrinsics->length(); | |
| 75 int index = intrinsic_insertion_index(cg->method(), cg->is_virtual()); | |
| 76 if (index == len) { | |
| 77 _intrinsics->append(cg); | |
| 78 } else { | |
| 79 #ifdef ASSERT | |
| 80 CallGenerator* oldcg = _intrinsics->at(index); | |
| 81 assert(oldcg->method() != cg->method() || oldcg->is_virtual() != cg->is_virtual(), "don't register twice"); | |
| 82 #endif | |
| 83 _intrinsics->append(_intrinsics->at(len-1)); | |
| 84 int pos; | |
| 85 for (pos = len-2; pos >= index; pos--) { | |
| 86 _intrinsics->at_put(pos+1,_intrinsics->at(pos)); | |
| 87 } | |
| 88 _intrinsics->at_put(index, cg); | |
| 89 } | |
| 90 assert(find_intrinsic(cg->method(), cg->is_virtual()) == cg, "registration worked"); | |
| 91 } | |
| 92 | |
| 93 CallGenerator* Compile::find_intrinsic(ciMethod* m, bool is_virtual) { | |
| 94 assert(m->is_loaded(), "don't try this on unloaded methods"); | |
| 95 if (_intrinsics != NULL) { | |
| 96 int index = intrinsic_insertion_index(m, is_virtual); | |
| 97 if (index < _intrinsics->length() | |
| 98 && _intrinsics->at(index)->method() == m | |
| 99 && _intrinsics->at(index)->is_virtual() == is_virtual) { | |
| 100 return _intrinsics->at(index); | |
| 101 } | |
| 102 } | |
| 103 // Lazily create intrinsics for intrinsic IDs well-known in the runtime. | |
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104 if (m->intrinsic_id() != vmIntrinsics::_none && |
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105 m->intrinsic_id() <= vmIntrinsics::LAST_COMPILER_INLINE) { |
| 0 | 106 CallGenerator* cg = make_vm_intrinsic(m, is_virtual); |
| 107 if (cg != NULL) { | |
| 108 // Save it for next time: | |
| 109 register_intrinsic(cg); | |
| 110 return cg; | |
| 111 } else { | |
| 112 gather_intrinsic_statistics(m->intrinsic_id(), is_virtual, _intrinsic_disabled); | |
| 113 } | |
| 114 } | |
| 115 return NULL; | |
| 116 } | |
| 117 | |
| 118 // Compile:: register_library_intrinsics and make_vm_intrinsic are defined | |
| 119 // in library_call.cpp. | |
| 120 | |
| 121 | |
| 122 #ifndef PRODUCT | |
| 123 // statistics gathering... | |
| 124 | |
| 125 juint Compile::_intrinsic_hist_count[vmIntrinsics::ID_LIMIT] = {0}; | |
| 126 jubyte Compile::_intrinsic_hist_flags[vmIntrinsics::ID_LIMIT] = {0}; | |
| 127 | |
| 128 bool Compile::gather_intrinsic_statistics(vmIntrinsics::ID id, bool is_virtual, int flags) { | |
| 129 assert(id > vmIntrinsics::_none && id < vmIntrinsics::ID_LIMIT, "oob"); | |
| 130 int oflags = _intrinsic_hist_flags[id]; | |
| 131 assert(flags != 0, "what happened?"); | |
| 132 if (is_virtual) { | |
| 133 flags |= _intrinsic_virtual; | |
| 134 } | |
| 135 bool changed = (flags != oflags); | |
| 136 if ((flags & _intrinsic_worked) != 0) { | |
| 137 juint count = (_intrinsic_hist_count[id] += 1); | |
| 138 if (count == 1) { | |
| 139 changed = true; // first time | |
| 140 } | |
| 141 // increment the overall count also: | |
| 142 _intrinsic_hist_count[vmIntrinsics::_none] += 1; | |
| 143 } | |
| 144 if (changed) { | |
| 145 if (((oflags ^ flags) & _intrinsic_virtual) != 0) { | |
| 146 // Something changed about the intrinsic's virtuality. | |
| 147 if ((flags & _intrinsic_virtual) != 0) { | |
| 148 // This is the first use of this intrinsic as a virtual call. | |
| 149 if (oflags != 0) { | |
| 150 // We already saw it as a non-virtual, so note both cases. | |
| 151 flags |= _intrinsic_both; | |
| 152 } | |
| 153 } else if ((oflags & _intrinsic_both) == 0) { | |
| 154 // This is the first use of this intrinsic as a non-virtual | |
| 155 flags |= _intrinsic_both; | |
| 156 } | |
| 157 } | |
| 158 _intrinsic_hist_flags[id] = (jubyte) (oflags | flags); | |
| 159 } | |
| 160 // update the overall flags also: | |
| 161 _intrinsic_hist_flags[vmIntrinsics::_none] |= (jubyte) flags; | |
| 162 return changed; | |
| 163 } | |
| 164 | |
| 165 static char* format_flags(int flags, char* buf) { | |
| 166 buf[0] = 0; | |
| 167 if ((flags & Compile::_intrinsic_worked) != 0) strcat(buf, ",worked"); | |
| 168 if ((flags & Compile::_intrinsic_failed) != 0) strcat(buf, ",failed"); | |
| 169 if ((flags & Compile::_intrinsic_disabled) != 0) strcat(buf, ",disabled"); | |
| 170 if ((flags & Compile::_intrinsic_virtual) != 0) strcat(buf, ",virtual"); | |
| 171 if ((flags & Compile::_intrinsic_both) != 0) strcat(buf, ",nonvirtual"); | |
| 172 if (buf[0] == 0) strcat(buf, ","); | |
| 173 assert(buf[0] == ',', "must be"); | |
| 174 return &buf[1]; | |
| 175 } | |
| 176 | |
| 177 void Compile::print_intrinsic_statistics() { | |
| 178 char flagsbuf[100]; | |
| 179 ttyLocker ttyl; | |
| 180 if (xtty != NULL) xtty->head("statistics type='intrinsic'"); | |
| 181 tty->print_cr("Compiler intrinsic usage:"); | |
| 182 juint total = _intrinsic_hist_count[vmIntrinsics::_none]; | |
| 183 if (total == 0) total = 1; // avoid div0 in case of no successes | |
| 184 #define PRINT_STAT_LINE(name, c, f) \ | |
| 185 tty->print_cr(" %4d (%4.1f%%) %s (%s)", (int)(c), ((c) * 100.0) / total, name, f); | |
| 186 for (int index = 1 + (int)vmIntrinsics::_none; index < (int)vmIntrinsics::ID_LIMIT; index++) { | |
| 187 vmIntrinsics::ID id = (vmIntrinsics::ID) index; | |
| 188 int flags = _intrinsic_hist_flags[id]; | |
| 189 juint count = _intrinsic_hist_count[id]; | |
| 190 if ((flags | count) != 0) { | |
| 191 PRINT_STAT_LINE(vmIntrinsics::name_at(id), count, format_flags(flags, flagsbuf)); | |
| 192 } | |
| 193 } | |
| 194 PRINT_STAT_LINE("total", total, format_flags(_intrinsic_hist_flags[vmIntrinsics::_none], flagsbuf)); | |
| 195 if (xtty != NULL) xtty->tail("statistics"); | |
| 196 } | |
| 197 | |
| 198 void Compile::print_statistics() { | |
| 199 { ttyLocker ttyl; | |
| 200 if (xtty != NULL) xtty->head("statistics type='opto'"); | |
| 201 Parse::print_statistics(); | |
| 202 PhaseCCP::print_statistics(); | |
| 203 PhaseRegAlloc::print_statistics(); | |
| 204 Scheduling::print_statistics(); | |
| 205 PhasePeephole::print_statistics(); | |
| 206 PhaseIdealLoop::print_statistics(); | |
| 207 if (xtty != NULL) xtty->tail("statistics"); | |
| 208 } | |
| 209 if (_intrinsic_hist_flags[vmIntrinsics::_none] != 0) { | |
| 210 // put this under its own <statistics> element. | |
| 211 print_intrinsic_statistics(); | |
| 212 } | |
| 213 } | |
| 214 #endif //PRODUCT | |
| 215 | |
| 216 // Support for bundling info | |
| 217 Bundle* Compile::node_bundling(const Node *n) { | |
| 218 assert(valid_bundle_info(n), "oob"); | |
| 219 return &_node_bundling_base[n->_idx]; | |
| 220 } | |
| 221 | |
| 222 bool Compile::valid_bundle_info(const Node *n) { | |
| 223 return (_node_bundling_limit > n->_idx); | |
| 224 } | |
| 225 | |
| 226 | |
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227 void Compile::gvn_replace_by(Node* n, Node* nn) { |
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228 for (DUIterator_Last imin, i = n->last_outs(imin); i >= imin; ) { |
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229 Node* use = n->last_out(i); |
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230 bool is_in_table = initial_gvn()->hash_delete(use); |
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231 uint uses_found = 0; |
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232 for (uint j = 0; j < use->len(); j++) { |
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233 if (use->in(j) == n) { |
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234 if (j < use->req()) |
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235 use->set_req(j, nn); |
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236 else |
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237 use->set_prec(j, nn); |
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238 uses_found++; |
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239 } |
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240 } |
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241 if (is_in_table) { |
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242 // reinsert into table |
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243 initial_gvn()->hash_find_insert(use); |
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244 } |
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245 record_for_igvn(use); |
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246 i -= uses_found; // we deleted 1 or more copies of this edge |
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247 } |
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248 } |
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249 |
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250 |
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251 |
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252 |
| 0 | 253 // Identify all nodes that are reachable from below, useful. |
| 254 // Use breadth-first pass that records state in a Unique_Node_List, | |
| 255 // recursive traversal is slower. | |
| 256 void Compile::identify_useful_nodes(Unique_Node_List &useful) { | |
| 257 int estimated_worklist_size = unique(); | |
| 258 useful.map( estimated_worklist_size, NULL ); // preallocate space | |
| 259 | |
| 260 // Initialize worklist | |
| 261 if (root() != NULL) { useful.push(root()); } | |
| 262 // If 'top' is cached, declare it useful to preserve cached node | |
| 263 if( cached_top_node() ) { useful.push(cached_top_node()); } | |
| 264 | |
| 265 // Push all useful nodes onto the list, breadthfirst | |
| 266 for( uint next = 0; next < useful.size(); ++next ) { | |
| 267 assert( next < unique(), "Unique useful nodes < total nodes"); | |
| 268 Node *n = useful.at(next); | |
| 269 uint max = n->len(); | |
| 270 for( uint i = 0; i < max; ++i ) { | |
| 271 Node *m = n->in(i); | |
| 272 if( m == NULL ) continue; | |
| 273 useful.push(m); | |
| 274 } | |
| 275 } | |
| 276 } | |
| 277 | |
| 278 // Disconnect all useless nodes by disconnecting those at the boundary. | |
| 279 void Compile::remove_useless_nodes(Unique_Node_List &useful) { | |
| 280 uint next = 0; | |
| 281 while( next < useful.size() ) { | |
| 282 Node *n = useful.at(next++); | |
| 283 // Use raw traversal of out edges since this code removes out edges | |
| 284 int max = n->outcnt(); | |
| 285 for (int j = 0; j < max; ++j ) { | |
| 286 Node* child = n->raw_out(j); | |
| 287 if( ! useful.member(child) ) { | |
| 288 assert( !child->is_top() || child != top(), | |
| 289 "If top is cached in Compile object it is in useful list"); | |
| 290 // Only need to remove this out-edge to the useless node | |
| 291 n->raw_del_out(j); | |
| 292 --j; | |
| 293 --max; | |
| 294 } | |
| 295 } | |
| 296 if (n->outcnt() == 1 && n->has_special_unique_user()) { | |
| 297 record_for_igvn( n->unique_out() ); | |
| 298 } | |
| 299 } | |
| 300 debug_only(verify_graph_edges(true/*check for no_dead_code*/);) | |
| 301 } | |
| 302 | |
| 303 //------------------------------frame_size_in_words----------------------------- | |
| 304 // frame_slots in units of words | |
| 305 int Compile::frame_size_in_words() const { | |
| 306 // shift is 0 in LP32 and 1 in LP64 | |
| 307 const int shift = (LogBytesPerWord - LogBytesPerInt); | |
| 308 int words = _frame_slots >> shift; | |
| 309 assert( words << shift == _frame_slots, "frame size must be properly aligned in LP64" ); | |
| 310 return words; | |
| 311 } | |
| 312 | |
| 313 // ============================================================================ | |
| 314 //------------------------------CompileWrapper--------------------------------- | |
| 315 class CompileWrapper : public StackObj { | |
| 316 Compile *const _compile; | |
| 317 public: | |
| 318 CompileWrapper(Compile* compile); | |
| 319 | |
| 320 ~CompileWrapper(); | |
| 321 }; | |
| 322 | |
| 323 CompileWrapper::CompileWrapper(Compile* compile) : _compile(compile) { | |
| 324 // the Compile* pointer is stored in the current ciEnv: | |
| 325 ciEnv* env = compile->env(); | |
| 326 assert(env == ciEnv::current(), "must already be a ciEnv active"); | |
| 327 assert(env->compiler_data() == NULL, "compile already active?"); | |
| 328 env->set_compiler_data(compile); | |
| 329 assert(compile == Compile::current(), "sanity"); | |
| 330 | |
| 331 compile->set_type_dict(NULL); | |
| 332 compile->set_type_hwm(NULL); | |
| 333 compile->set_type_last_size(0); | |
| 334 compile->set_last_tf(NULL, NULL); | |
| 335 compile->set_indexSet_arena(NULL); | |
| 336 compile->set_indexSet_free_block_list(NULL); | |
| 337 compile->init_type_arena(); | |
| 338 Type::Initialize(compile); | |
| 339 _compile->set_scratch_buffer_blob(NULL); | |
| 340 _compile->begin_method(); | |
| 341 } | |
| 342 CompileWrapper::~CompileWrapper() { | |
| 343 _compile->end_method(); | |
| 344 if (_compile->scratch_buffer_blob() != NULL) | |
| 345 BufferBlob::free(_compile->scratch_buffer_blob()); | |
| 346 _compile->env()->set_compiler_data(NULL); | |
| 347 } | |
| 348 | |
| 349 | |
| 350 //----------------------------print_compile_messages--------------------------- | |
| 351 void Compile::print_compile_messages() { | |
| 352 #ifndef PRODUCT | |
| 353 // Check if recompiling | |
| 354 if (_subsume_loads == false && PrintOpto) { | |
| 355 // Recompiling without allowing machine instructions to subsume loads | |
| 356 tty->print_cr("*********************************************************"); | |
| 357 tty->print_cr("** Bailout: Recompile without subsuming loads **"); | |
| 358 tty->print_cr("*********************************************************"); | |
| 359 } | |
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360 if (_do_escape_analysis != DoEscapeAnalysis && PrintOpto) { |
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361 // Recompiling without escape analysis |
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362 tty->print_cr("*********************************************************"); |
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363 tty->print_cr("** Bailout: Recompile without escape analysis **"); |
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364 tty->print_cr("*********************************************************"); |
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365 } |
| 0 | 366 if (env()->break_at_compile()) { |
| 605 | 367 // Open the debugger when compiling this method. |
| 0 | 368 tty->print("### Breaking when compiling: "); |
| 369 method()->print_short_name(); | |
| 370 tty->cr(); | |
| 371 BREAKPOINT; | |
| 372 } | |
| 373 | |
| 374 if( PrintOpto ) { | |
| 375 if (is_osr_compilation()) { | |
| 376 tty->print("[OSR]%3d", _compile_id); | |
| 377 } else { | |
| 378 tty->print("%3d", _compile_id); | |
| 379 } | |
| 380 } | |
| 381 #endif | |
| 382 } | |
| 383 | |
| 384 | |
| 385 void Compile::init_scratch_buffer_blob() { | |
| 386 if( scratch_buffer_blob() != NULL ) return; | |
| 387 | |
| 388 // Construct a temporary CodeBuffer to have it construct a BufferBlob | |
| 389 // Cache this BufferBlob for this compile. | |
| 390 ResourceMark rm; | |
| 391 int size = (MAX_inst_size + MAX_stubs_size + MAX_const_size); | |
| 392 BufferBlob* blob = BufferBlob::create("Compile::scratch_buffer", size); | |
| 393 // Record the buffer blob for next time. | |
| 394 set_scratch_buffer_blob(blob); | |
| 163 | 395 // Have we run out of code space? |
| 396 if (scratch_buffer_blob() == NULL) { | |
| 397 // Let CompilerBroker disable further compilations. | |
| 398 record_failure("Not enough space for scratch buffer in CodeCache"); | |
| 399 return; | |
| 400 } | |
| 0 | 401 |
| 402 // Initialize the relocation buffers | |
| 403 relocInfo* locs_buf = (relocInfo*) blob->instructions_end() - MAX_locs_size; | |
| 404 set_scratch_locs_memory(locs_buf); | |
| 405 } | |
| 406 | |
| 407 | |
| 408 //-----------------------scratch_emit_size------------------------------------- | |
| 409 // Helper function that computes size by emitting code | |
| 410 uint Compile::scratch_emit_size(const Node* n) { | |
| 411 // Emit into a trash buffer and count bytes emitted. | |
| 412 // This is a pretty expensive way to compute a size, | |
| 413 // but it works well enough if seldom used. | |
| 414 // All common fixed-size instructions are given a size | |
| 415 // method by the AD file. | |
| 416 // Note that the scratch buffer blob and locs memory are | |
| 417 // allocated at the beginning of the compile task, and | |
| 418 // may be shared by several calls to scratch_emit_size. | |
| 419 // The allocation of the scratch buffer blob is particularly | |
| 420 // expensive, since it has to grab the code cache lock. | |
| 421 BufferBlob* blob = this->scratch_buffer_blob(); | |
| 422 assert(blob != NULL, "Initialize BufferBlob at start"); | |
| 423 assert(blob->size() > MAX_inst_size, "sanity"); | |
| 424 relocInfo* locs_buf = scratch_locs_memory(); | |
| 425 address blob_begin = blob->instructions_begin(); | |
| 426 address blob_end = (address)locs_buf; | |
| 427 assert(blob->instructions_contains(blob_end), "sanity"); | |
| 428 CodeBuffer buf(blob_begin, blob_end - blob_begin); | |
| 429 buf.initialize_consts_size(MAX_const_size); | |
| 430 buf.initialize_stubs_size(MAX_stubs_size); | |
| 431 assert(locs_buf != NULL, "sanity"); | |
| 432 int lsize = MAX_locs_size / 2; | |
| 433 buf.insts()->initialize_shared_locs(&locs_buf[0], lsize); | |
| 434 buf.stubs()->initialize_shared_locs(&locs_buf[lsize], lsize); | |
| 435 n->emit(buf, this->regalloc()); | |
| 436 return buf.code_size(); | |
| 437 } | |
| 438 | |
| 439 | |
| 440 // ============================================================================ | |
| 441 //------------------------------Compile standard------------------------------- | |
| 442 debug_only( int Compile::_debug_idx = 100000; ) | |
| 443 | |
| 444 // Compile a method. entry_bci is -1 for normal compilations and indicates | |
| 445 // the continuation bci for on stack replacement. | |
| 446 | |
| 447 | |
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448 Compile::Compile( ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, int osr_bci, bool subsume_loads, bool do_escape_analysis ) |
| 0 | 449 : Phase(Compiler), |
| 450 _env(ci_env), | |
| 451 _log(ci_env->log()), | |
| 452 _compile_id(ci_env->compile_id()), | |
| 453 _save_argument_registers(false), | |
| 454 _stub_name(NULL), | |
| 455 _stub_function(NULL), | |
| 456 _stub_entry_point(NULL), | |
| 457 _method(target), | |
| 458 _entry_bci(osr_bci), | |
| 459 _initial_gvn(NULL), | |
| 460 _for_igvn(NULL), | |
| 461 _warm_calls(NULL), | |
| 462 _subsume_loads(subsume_loads), | |
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463 _do_escape_analysis(do_escape_analysis), |
| 0 | 464 _failure_reason(NULL), |
| 465 _code_buffer("Compile::Fill_buffer"), | |
| 466 _orig_pc_slot(0), | |
| 467 _orig_pc_slot_offset_in_bytes(0), | |
| 1265 | 468 _has_method_handle_invokes(false), |
| 0 | 469 _node_bundling_limit(0), |
| 470 _node_bundling_base(NULL), | |
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471 _java_calls(0), |
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472 _inner_loops(0), |
| 0 | 473 #ifndef PRODUCT |
| 474 _trace_opto_output(TraceOptoOutput || method()->has_option("TraceOptoOutput")), | |
| 475 _printer(IdealGraphPrinter::printer()), | |
| 476 #endif | |
| 477 _congraph(NULL) { | |
| 478 C = this; | |
| 479 | |
| 480 CompileWrapper cw(this); | |
| 481 #ifndef PRODUCT | |
| 482 if (TimeCompiler2) { | |
| 483 tty->print(" "); | |
| 484 target->holder()->name()->print(); | |
| 485 tty->print("."); | |
| 486 target->print_short_name(); | |
| 487 tty->print(" "); | |
| 488 } | |
| 489 TraceTime t1("Total compilation time", &_t_totalCompilation, TimeCompiler, TimeCompiler2); | |
| 490 TraceTime t2(NULL, &_t_methodCompilation, TimeCompiler, false); | |
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491 bool print_opto_assembly = PrintOptoAssembly || _method->has_option("PrintOptoAssembly"); |
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492 if (!print_opto_assembly) { |
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493 bool print_assembly = (PrintAssembly || _method->should_print_assembly()); |
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494 if (print_assembly && !Disassembler::can_decode()) { |
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495 tty->print_cr("PrintAssembly request changed to PrintOptoAssembly"); |
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496 print_opto_assembly = true; |
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497 } |
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498 } |
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499 set_print_assembly(print_opto_assembly); |
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500 set_parsed_irreducible_loop(false); |
| 0 | 501 #endif |
| 502 | |
| 503 if (ProfileTraps) { | |
| 504 // Make sure the method being compiled gets its own MDO, | |
| 505 // so we can at least track the decompile_count(). | |
| 506 method()->build_method_data(); | |
| 507 } | |
| 508 | |
| 509 Init(::AliasLevel); | |
| 510 | |
| 511 | |
| 512 print_compile_messages(); | |
| 513 | |
| 514 if (UseOldInlining || PrintCompilation NOT_PRODUCT( || PrintOpto) ) | |
| 515 _ilt = InlineTree::build_inline_tree_root(); | |
| 516 else | |
| 517 _ilt = NULL; | |
| 518 | |
| 519 // Even if NO memory addresses are used, MergeMem nodes must have at least 1 slice | |
| 520 assert(num_alias_types() >= AliasIdxRaw, ""); | |
| 521 | |
| 522 #define MINIMUM_NODE_HASH 1023 | |
| 523 // Node list that Iterative GVN will start with | |
| 524 Unique_Node_List for_igvn(comp_arena()); | |
| 525 set_for_igvn(&for_igvn); | |
| 526 | |
| 527 // GVN that will be run immediately on new nodes | |
| 528 uint estimated_size = method()->code_size()*4+64; | |
| 529 estimated_size = (estimated_size < MINIMUM_NODE_HASH ? MINIMUM_NODE_HASH : estimated_size); | |
| 530 PhaseGVN gvn(node_arena(), estimated_size); | |
| 531 set_initial_gvn(&gvn); | |
| 532 | |
| 533 { // Scope for timing the parser | |
| 534 TracePhase t3("parse", &_t_parser, true); | |
| 535 | |
| 536 // Put top into the hash table ASAP. | |
| 537 initial_gvn()->transform_no_reclaim(top()); | |
| 538 | |
| 539 // Set up tf(), start(), and find a CallGenerator. | |
| 540 CallGenerator* cg; | |
| 541 if (is_osr_compilation()) { | |
| 542 const TypeTuple *domain = StartOSRNode::osr_domain(); | |
| 543 const TypeTuple *range = TypeTuple::make_range(method()->signature()); | |
| 544 init_tf(TypeFunc::make(domain, range)); | |
| 545 StartNode* s = new (this, 2) StartOSRNode(root(), domain); | |
| 546 initial_gvn()->set_type_bottom(s); | |
| 547 init_start(s); | |
| 548 cg = CallGenerator::for_osr(method(), entry_bci()); | |
| 549 } else { | |
| 550 // Normal case. | |
| 551 init_tf(TypeFunc::make(method())); | |
| 552 StartNode* s = new (this, 2) StartNode(root(), tf()->domain()); | |
| 553 initial_gvn()->set_type_bottom(s); | |
| 554 init_start(s); | |
| 555 float past_uses = method()->interpreter_invocation_count(); | |
| 556 float expected_uses = past_uses; | |
| 557 cg = CallGenerator::for_inline(method(), expected_uses); | |
| 558 } | |
| 559 if (failing()) return; | |
| 560 if (cg == NULL) { | |
| 561 record_method_not_compilable_all_tiers("cannot parse method"); | |
| 562 return; | |
| 563 } | |
| 564 JVMState* jvms = build_start_state(start(), tf()); | |
| 565 if ((jvms = cg->generate(jvms)) == NULL) { | |
| 566 record_method_not_compilable("method parse failed"); | |
| 567 return; | |
| 568 } | |
| 569 GraphKit kit(jvms); | |
| 570 | |
| 571 if (!kit.stopped()) { | |
| 572 // Accept return values, and transfer control we know not where. | |
| 573 // This is done by a special, unique ReturnNode bound to root. | |
| 574 return_values(kit.jvms()); | |
| 575 } | |
| 576 | |
| 577 if (kit.has_exceptions()) { | |
| 578 // Any exceptions that escape from this call must be rethrown | |
| 579 // to whatever caller is dynamically above us on the stack. | |
| 580 // This is done by a special, unique RethrowNode bound to root. | |
| 581 rethrow_exceptions(kit.transfer_exceptions_into_jvms()); | |
| 582 } | |
| 583 | |
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584 if (!failing() && has_stringbuilder()) { |
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585 { |
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586 // remove useless nodes to make the usage analysis simpler |
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587 ResourceMark rm; |
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588 PhaseRemoveUseless pru(initial_gvn(), &for_igvn); |
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589 } |
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590 |
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591 { |
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592 ResourceMark rm; |
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593 print_method("Before StringOpts", 3); |
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594 PhaseStringOpts pso(initial_gvn(), &for_igvn); |
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595 print_method("After StringOpts", 3); |
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596 } |
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597 |
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598 // now inline anything that we skipped the first time around |
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599 while (_late_inlines.length() > 0) { |
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600 CallGenerator* cg = _late_inlines.pop(); |
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601 cg->do_late_inline(); |
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602 } |
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603 } |
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604 assert(_late_inlines.length() == 0, "should have been processed"); |
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605 |
| 417 | 606 print_method("Before RemoveUseless", 3); |
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607 |
| 0 | 608 // Remove clutter produced by parsing. |
| 609 if (!failing()) { | |
| 610 ResourceMark rm; | |
| 611 PhaseRemoveUseless pru(initial_gvn(), &for_igvn); | |
| 612 } | |
| 613 } | |
| 614 | |
| 615 // Note: Large methods are capped off in do_one_bytecode(). | |
| 616 if (failing()) return; | |
| 617 | |
| 618 // After parsing, node notes are no longer automagic. | |
| 619 // They must be propagated by register_new_node_with_optimizer(), | |
| 620 // clone(), or the like. | |
| 621 set_default_node_notes(NULL); | |
| 622 | |
| 623 for (;;) { | |
| 624 int successes = Inline_Warm(); | |
| 625 if (failing()) return; | |
| 626 if (successes == 0) break; | |
| 627 } | |
| 628 | |
| 629 // Drain the list. | |
| 630 Finish_Warm(); | |
| 631 #ifndef PRODUCT | |
| 632 if (_printer) { | |
| 633 _printer->print_inlining(this); | |
| 634 } | |
| 635 #endif | |
| 636 | |
| 637 if (failing()) return; | |
| 638 NOT_PRODUCT( verify_graph_edges(); ) | |
| 639 | |
| 640 // Perform escape analysis | |
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641 if (_do_escape_analysis && ConnectionGraph::has_candidates(this)) { |
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642 TracePhase t2("escapeAnalysis", &_t_escapeAnalysis, true); |
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643 // Add ConP#NULL and ConN#NULL nodes before ConnectionGraph construction. |
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644 PhaseGVN* igvn = initial_gvn(); |
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645 Node* oop_null = igvn->zerocon(T_OBJECT); |
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646 Node* noop_null = igvn->zerocon(T_NARROWOOP); |
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647 |
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648 _congraph = new(comp_arena()) ConnectionGraph(this); |
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649 bool has_non_escaping_obj = _congraph->compute_escape(); |
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650 |
| 0 | 651 #ifndef PRODUCT |
| 652 if (PrintEscapeAnalysis) { | |
| 653 _congraph->dump(); | |
| 654 } | |
| 655 #endif | |
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656 // Cleanup. |
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657 if (oop_null->outcnt() == 0) |
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658 igvn->hash_delete(oop_null); |
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659 if (noop_null->outcnt() == 0) |
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660 igvn->hash_delete(noop_null); |
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661 |
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662 if (!has_non_escaping_obj) { |
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663 _congraph = NULL; |
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664 } |
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665 |
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666 if (failing()) return; |
| 0 | 667 } |
| 668 // Now optimize | |
| 669 Optimize(); | |
| 670 if (failing()) return; | |
| 671 NOT_PRODUCT( verify_graph_edges(); ) | |
| 672 | |
| 673 #ifndef PRODUCT | |
| 674 if (PrintIdeal) { | |
| 675 ttyLocker ttyl; // keep the following output all in one block | |
| 676 // This output goes directly to the tty, not the compiler log. | |
| 677 // To enable tools to match it up with the compilation activity, | |
| 678 // be sure to tag this tty output with the compile ID. | |
| 679 if (xtty != NULL) { | |
| 680 xtty->head("ideal compile_id='%d'%s", compile_id(), | |
| 681 is_osr_compilation() ? " compile_kind='osr'" : | |
| 682 ""); | |
| 683 } | |
| 684 root()->dump(9999); | |
| 685 if (xtty != NULL) { | |
| 686 xtty->tail("ideal"); | |
| 687 } | |
| 688 } | |
| 689 #endif | |
| 690 | |
| 691 // Now that we know the size of all the monitors we can add a fixed slot | |
| 692 // for the original deopt pc. | |
| 693 | |
| 694 _orig_pc_slot = fixed_slots(); | |
| 695 int next_slot = _orig_pc_slot + (sizeof(address) / VMRegImpl::stack_slot_size); | |
| 696 set_fixed_slots(next_slot); | |
| 697 | |
| 698 // Now generate code | |
| 699 Code_Gen(); | |
| 700 if (failing()) return; | |
| 701 | |
| 702 // Check if we want to skip execution of all compiled code. | |
| 703 { | |
| 704 #ifndef PRODUCT | |
| 705 if (OptoNoExecute) { | |
| 706 record_method_not_compilable("+OptoNoExecute"); // Flag as failed | |
| 707 return; | |
| 708 } | |
| 709 TracePhase t2("install_code", &_t_registerMethod, TimeCompiler); | |
| 710 #endif | |
| 711 | |
| 712 if (is_osr_compilation()) { | |
| 713 _code_offsets.set_value(CodeOffsets::Verified_Entry, 0); | |
| 714 _code_offsets.set_value(CodeOffsets::OSR_Entry, _first_block_size); | |
| 715 } else { | |
| 716 _code_offsets.set_value(CodeOffsets::Verified_Entry, _first_block_size); | |
| 717 _code_offsets.set_value(CodeOffsets::OSR_Entry, 0); | |
| 718 } | |
| 719 | |
| 720 env()->register_method(_method, _entry_bci, | |
| 721 &_code_offsets, | |
| 722 _orig_pc_slot_offset_in_bytes, | |
| 723 code_buffer(), | |
| 724 frame_size_in_words(), _oop_map_set, | |
| 725 &_handler_table, &_inc_table, | |
| 726 compiler, | |
| 727 env()->comp_level(), | |
| 728 true, /*has_debug_info*/ | |
| 729 has_unsafe_access() | |
| 730 ); | |
| 731 } | |
| 732 } | |
| 733 | |
| 734 //------------------------------Compile---------------------------------------- | |
| 735 // Compile a runtime stub | |
| 736 Compile::Compile( ciEnv* ci_env, | |
| 737 TypeFunc_generator generator, | |
| 738 address stub_function, | |
| 739 const char *stub_name, | |
| 740 int is_fancy_jump, | |
| 741 bool pass_tls, | |
| 742 bool save_arg_registers, | |
| 743 bool return_pc ) | |
| 744 : Phase(Compiler), | |
| 745 _env(ci_env), | |
| 746 _log(ci_env->log()), | |
| 747 _compile_id(-1), | |
| 748 _save_argument_registers(save_arg_registers), | |
| 749 _method(NULL), | |
| 750 _stub_name(stub_name), | |
| 751 _stub_function(stub_function), | |
| 752 _stub_entry_point(NULL), | |
| 753 _entry_bci(InvocationEntryBci), | |
| 754 _initial_gvn(NULL), | |
| 755 _for_igvn(NULL), | |
| 756 _warm_calls(NULL), | |
| 757 _orig_pc_slot(0), | |
| 758 _orig_pc_slot_offset_in_bytes(0), | |
| 759 _subsume_loads(true), | |
|
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760 _do_escape_analysis(false), |
| 0 | 761 _failure_reason(NULL), |
| 762 _code_buffer("Compile::Fill_buffer"), | |
| 1265 | 763 _has_method_handle_invokes(false), |
| 0 | 764 _node_bundling_limit(0), |
| 765 _node_bundling_base(NULL), | |
|
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766 _java_calls(0), |
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767 _inner_loops(0), |
| 0 | 768 #ifndef PRODUCT |
| 769 _trace_opto_output(TraceOptoOutput), | |
| 770 _printer(NULL), | |
| 771 #endif | |
| 772 _congraph(NULL) { | |
| 773 C = this; | |
| 774 | |
| 775 #ifndef PRODUCT | |
| 776 TraceTime t1(NULL, &_t_totalCompilation, TimeCompiler, false); | |
| 777 TraceTime t2(NULL, &_t_stubCompilation, TimeCompiler, false); | |
| 778 set_print_assembly(PrintFrameConverterAssembly); | |
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779 set_parsed_irreducible_loop(false); |
| 0 | 780 #endif |
| 781 CompileWrapper cw(this); | |
| 782 Init(/*AliasLevel=*/ 0); | |
| 783 init_tf((*generator)()); | |
| 784 | |
| 785 { | |
| 786 // The following is a dummy for the sake of GraphKit::gen_stub | |
| 787 Unique_Node_List for_igvn(comp_arena()); | |
| 788 set_for_igvn(&for_igvn); // not used, but some GraphKit guys push on this | |
| 789 PhaseGVN gvn(Thread::current()->resource_area(),255); | |
| 790 set_initial_gvn(&gvn); // not significant, but GraphKit guys use it pervasively | |
| 791 gvn.transform_no_reclaim(top()); | |
| 792 | |
| 793 GraphKit kit; | |
| 794 kit.gen_stub(stub_function, stub_name, is_fancy_jump, pass_tls, return_pc); | |
| 795 } | |
| 796 | |
| 797 NOT_PRODUCT( verify_graph_edges(); ) | |
| 798 Code_Gen(); | |
| 799 if (failing()) return; | |
| 800 | |
| 801 | |
| 802 // Entry point will be accessed using compile->stub_entry_point(); | |
| 803 if (code_buffer() == NULL) { | |
| 804 Matcher::soft_match_failure(); | |
| 805 } else { | |
| 806 if (PrintAssembly && (WizardMode || Verbose)) | |
| 807 tty->print_cr("### Stub::%s", stub_name); | |
| 808 | |
| 809 if (!failing()) { | |
| 810 assert(_fixed_slots == 0, "no fixed slots used for runtime stubs"); | |
| 811 | |
| 812 // Make the NMethod | |
| 813 // For now we mark the frame as never safe for profile stackwalking | |
| 814 RuntimeStub *rs = RuntimeStub::new_runtime_stub(stub_name, | |
| 815 code_buffer(), | |
| 816 CodeOffsets::frame_never_safe, | |
| 817 // _code_offsets.value(CodeOffsets::Frame_Complete), | |
| 818 frame_size_in_words(), | |
| 819 _oop_map_set, | |
| 820 save_arg_registers); | |
| 821 assert(rs != NULL && rs->is_runtime_stub(), "sanity check"); | |
| 822 | |
| 823 _stub_entry_point = rs->entry_point(); | |
| 824 } | |
| 825 } | |
| 826 } | |
| 827 | |
| 828 #ifndef PRODUCT | |
| 829 void print_opto_verbose_signature( const TypeFunc *j_sig, const char *stub_name ) { | |
| 830 if(PrintOpto && Verbose) { | |
| 831 tty->print("%s ", stub_name); j_sig->print_flattened(); tty->cr(); | |
| 832 } | |
| 833 } | |
| 834 #endif | |
| 835 | |
| 836 void Compile::print_codes() { | |
| 837 } | |
| 838 | |
| 839 //------------------------------Init------------------------------------------- | |
| 840 // Prepare for a single compilation | |
| 841 void Compile::Init(int aliaslevel) { | |
| 842 _unique = 0; | |
| 843 _regalloc = NULL; | |
| 844 | |
| 845 _tf = NULL; // filled in later | |
| 846 _top = NULL; // cached later | |
| 847 _matcher = NULL; // filled in later | |
| 848 _cfg = NULL; // filled in later | |
| 849 | |
| 850 set_24_bit_selection_and_mode(Use24BitFP, false); | |
| 851 | |
| 852 _node_note_array = NULL; | |
| 853 _default_node_notes = NULL; | |
| 854 | |
| 855 _immutable_memory = NULL; // filled in at first inquiry | |
| 856 | |
| 857 // Globally visible Nodes | |
| 858 // First set TOP to NULL to give safe behavior during creation of RootNode | |
| 859 set_cached_top_node(NULL); | |
| 860 set_root(new (this, 3) RootNode()); | |
| 861 // Now that you have a Root to point to, create the real TOP | |
| 862 set_cached_top_node( new (this, 1) ConNode(Type::TOP) ); | |
| 863 set_recent_alloc(NULL, NULL); | |
| 864 | |
| 865 // Create Debug Information Recorder to record scopes, oopmaps, etc. | |
| 866 env()->set_oop_recorder(new OopRecorder(comp_arena())); | |
| 867 env()->set_debug_info(new DebugInformationRecorder(env()->oop_recorder())); | |
| 868 env()->set_dependencies(new Dependencies(env())); | |
| 869 | |
| 870 _fixed_slots = 0; | |
| 871 set_has_split_ifs(false); | |
| 872 set_has_loops(has_method() && method()->has_loops()); // first approximation | |
|
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873 set_has_stringbuilder(false); |
| 0 | 874 _trap_can_recompile = false; // no traps emitted yet |
| 875 _major_progress = true; // start out assuming good things will happen | |
| 876 set_has_unsafe_access(false); | |
| 877 Copy::zero_to_bytes(_trap_hist, sizeof(_trap_hist)); | |
| 878 set_decompile_count(0); | |
| 879 | |
| 418 | 880 set_do_freq_based_layout(BlockLayoutByFrequency || method_has_option("BlockLayoutByFrequency")); |
| 0 | 881 // Compilation level related initialization |
| 882 if (env()->comp_level() == CompLevel_fast_compile) { | |
| 883 set_num_loop_opts(Tier1LoopOptsCount); | |
| 884 set_do_inlining(Tier1Inline != 0); | |
| 885 set_max_inline_size(Tier1MaxInlineSize); | |
| 886 set_freq_inline_size(Tier1FreqInlineSize); | |
| 887 set_do_scheduling(false); | |
| 888 set_do_count_invocations(Tier1CountInvocations); | |
| 889 set_do_method_data_update(Tier1UpdateMethodData); | |
| 890 } else { | |
| 891 assert(env()->comp_level() == CompLevel_full_optimization, "unknown comp level"); | |
| 892 set_num_loop_opts(LoopOptsCount); | |
| 893 set_do_inlining(Inline); | |
| 894 set_max_inline_size(MaxInlineSize); | |
| 895 set_freq_inline_size(FreqInlineSize); | |
| 896 set_do_scheduling(OptoScheduling); | |
| 897 set_do_count_invocations(false); | |
| 898 set_do_method_data_update(false); | |
| 899 } | |
| 900 | |
| 901 if (debug_info()->recording_non_safepoints()) { | |
| 902 set_node_note_array(new(comp_arena()) GrowableArray<Node_Notes*> | |
| 903 (comp_arena(), 8, 0, NULL)); | |
| 904 set_default_node_notes(Node_Notes::make(this)); | |
| 905 } | |
| 906 | |
| 907 // // -- Initialize types before each compile -- | |
| 908 // // Update cached type information | |
| 909 // if( _method && _method->constants() ) | |
| 910 // Type::update_loaded_types(_method, _method->constants()); | |
| 911 | |
| 912 // Init alias_type map. | |
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913 if (!_do_escape_analysis && aliaslevel == 3) |
| 0 | 914 aliaslevel = 2; // No unique types without escape analysis |
| 915 _AliasLevel = aliaslevel; | |
| 916 const int grow_ats = 16; | |
| 917 _max_alias_types = grow_ats; | |
| 918 _alias_types = NEW_ARENA_ARRAY(comp_arena(), AliasType*, grow_ats); | |
| 919 AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, grow_ats); | |
| 920 Copy::zero_to_bytes(ats, sizeof(AliasType)*grow_ats); | |
| 921 { | |
| 922 for (int i = 0; i < grow_ats; i++) _alias_types[i] = &ats[i]; | |
| 923 } | |
| 924 // Initialize the first few types. | |
| 925 _alias_types[AliasIdxTop]->Init(AliasIdxTop, NULL); | |
| 926 _alias_types[AliasIdxBot]->Init(AliasIdxBot, TypePtr::BOTTOM); | |
| 927 _alias_types[AliasIdxRaw]->Init(AliasIdxRaw, TypeRawPtr::BOTTOM); | |
| 928 _num_alias_types = AliasIdxRaw+1; | |
| 929 // Zero out the alias type cache. | |
| 930 Copy::zero_to_bytes(_alias_cache, sizeof(_alias_cache)); | |
| 931 // A NULL adr_type hits in the cache right away. Preload the right answer. | |
| 932 probe_alias_cache(NULL)->_index = AliasIdxTop; | |
| 933 | |
| 934 _intrinsics = NULL; | |
| 935 _macro_nodes = new GrowableArray<Node*>(comp_arena(), 8, 0, NULL); | |
| 1172 | 936 _predicate_opaqs = new GrowableArray<Node*>(comp_arena(), 8, 0, NULL); |
| 0 | 937 register_library_intrinsics(); |
| 938 } | |
| 939 | |
| 940 //---------------------------init_start---------------------------------------- | |
| 941 // Install the StartNode on this compile object. | |
| 942 void Compile::init_start(StartNode* s) { | |
| 943 if (failing()) | |
| 944 return; // already failing | |
| 945 assert(s == start(), ""); | |
| 946 } | |
| 947 | |
| 948 StartNode* Compile::start() const { | |
| 949 assert(!failing(), ""); | |
| 950 for (DUIterator_Fast imax, i = root()->fast_outs(imax); i < imax; i++) { | |
| 951 Node* start = root()->fast_out(i); | |
| 952 if( start->is_Start() ) | |
| 953 return start->as_Start(); | |
| 954 } | |
| 955 ShouldNotReachHere(); | |
| 956 return NULL; | |
| 957 } | |
| 958 | |
| 959 //-------------------------------immutable_memory------------------------------------- | |
| 960 // Access immutable memory | |
| 961 Node* Compile::immutable_memory() { | |
| 962 if (_immutable_memory != NULL) { | |
| 963 return _immutable_memory; | |
| 964 } | |
| 965 StartNode* s = start(); | |
| 966 for (DUIterator_Fast imax, i = s->fast_outs(imax); true; i++) { | |
| 967 Node *p = s->fast_out(i); | |
| 968 if (p != s && p->as_Proj()->_con == TypeFunc::Memory) { | |
| 969 _immutable_memory = p; | |
| 970 return _immutable_memory; | |
| 971 } | |
| 972 } | |
| 973 ShouldNotReachHere(); | |
| 974 return NULL; | |
| 975 } | |
| 976 | |
| 977 //----------------------set_cached_top_node------------------------------------ | |
| 978 // Install the cached top node, and make sure Node::is_top works correctly. | |
| 979 void Compile::set_cached_top_node(Node* tn) { | |
| 980 if (tn != NULL) verify_top(tn); | |
| 981 Node* old_top = _top; | |
| 982 _top = tn; | |
| 983 // Calling Node::setup_is_top allows the nodes the chance to adjust | |
| 984 // their _out arrays. | |
| 985 if (_top != NULL) _top->setup_is_top(); | |
| 986 if (old_top != NULL) old_top->setup_is_top(); | |
| 987 assert(_top == NULL || top()->is_top(), ""); | |
| 988 } | |
| 989 | |
| 990 #ifndef PRODUCT | |
| 991 void Compile::verify_top(Node* tn) const { | |
| 992 if (tn != NULL) { | |
| 993 assert(tn->is_Con(), "top node must be a constant"); | |
| 994 assert(((ConNode*)tn)->type() == Type::TOP, "top node must have correct type"); | |
| 995 assert(tn->in(0) != NULL, "must have live top node"); | |
| 996 } | |
| 997 } | |
| 998 #endif | |
| 999 | |
| 1000 | |
| 1001 ///-------------------Managing Per-Node Debug & Profile Info------------------- | |
| 1002 | |
| 1003 void Compile::grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by) { | |
| 1004 guarantee(arr != NULL, ""); | |
| 1005 int num_blocks = arr->length(); | |
| 1006 if (grow_by < num_blocks) grow_by = num_blocks; | |
| 1007 int num_notes = grow_by * _node_notes_block_size; | |
| 1008 Node_Notes* notes = NEW_ARENA_ARRAY(node_arena(), Node_Notes, num_notes); | |
| 1009 Copy::zero_to_bytes(notes, num_notes * sizeof(Node_Notes)); | |
| 1010 while (num_notes > 0) { | |
| 1011 arr->append(notes); | |
| 1012 notes += _node_notes_block_size; | |
| 1013 num_notes -= _node_notes_block_size; | |
| 1014 } | |
| 1015 assert(num_notes == 0, "exact multiple, please"); | |
| 1016 } | |
| 1017 | |
| 1018 bool Compile::copy_node_notes_to(Node* dest, Node* source) { | |
| 1019 if (source == NULL || dest == NULL) return false; | |
| 1020 | |
| 1021 if (dest->is_Con()) | |
| 1022 return false; // Do not push debug info onto constants. | |
| 1023 | |
| 1024 #ifdef ASSERT | |
| 1025 // Leave a bread crumb trail pointing to the original node: | |
| 1026 if (dest != NULL && dest != source && dest->debug_orig() == NULL) { | |
| 1027 dest->set_debug_orig(source); | |
| 1028 } | |
| 1029 #endif | |
| 1030 | |
| 1031 if (node_note_array() == NULL) | |
| 1032 return false; // Not collecting any notes now. | |
| 1033 | |
| 1034 // This is a copy onto a pre-existing node, which may already have notes. | |
| 1035 // If both nodes have notes, do not overwrite any pre-existing notes. | |
| 1036 Node_Notes* source_notes = node_notes_at(source->_idx); | |
| 1037 if (source_notes == NULL || source_notes->is_clear()) return false; | |
| 1038 Node_Notes* dest_notes = node_notes_at(dest->_idx); | |
| 1039 if (dest_notes == NULL || dest_notes->is_clear()) { | |
| 1040 return set_node_notes_at(dest->_idx, source_notes); | |
| 1041 } | |
| 1042 | |
| 1043 Node_Notes merged_notes = (*source_notes); | |
| 1044 // The order of operations here ensures that dest notes will win... | |
| 1045 merged_notes.update_from(dest_notes); | |
| 1046 return set_node_notes_at(dest->_idx, &merged_notes); | |
| 1047 } | |
| 1048 | |
| 1049 | |
| 1050 //--------------------------allow_range_check_smearing------------------------- | |
| 1051 // Gating condition for coalescing similar range checks. | |
| 1052 // Sometimes we try 'speculatively' replacing a series of a range checks by a | |
| 1053 // single covering check that is at least as strong as any of them. | |
| 1054 // If the optimization succeeds, the simplified (strengthened) range check | |
| 1055 // will always succeed. If it fails, we will deopt, and then give up | |
| 1056 // on the optimization. | |
| 1057 bool Compile::allow_range_check_smearing() const { | |
| 1058 // If this method has already thrown a range-check, | |
| 1059 // assume it was because we already tried range smearing | |
| 1060 // and it failed. | |
| 1061 uint already_trapped = trap_count(Deoptimization::Reason_range_check); | |
| 1062 return !already_trapped; | |
| 1063 } | |
| 1064 | |
| 1065 | |
| 1066 //------------------------------flatten_alias_type----------------------------- | |
| 1067 const TypePtr *Compile::flatten_alias_type( const TypePtr *tj ) const { | |
| 1068 int offset = tj->offset(); | |
| 1069 TypePtr::PTR ptr = tj->ptr(); | |
| 1070 | |
| 247 | 1071 // Known instance (scalarizable allocation) alias only with itself. |
| 1072 bool is_known_inst = tj->isa_oopptr() != NULL && | |
| 1073 tj->is_oopptr()->is_known_instance(); | |
| 1074 | |
| 0 | 1075 // Process weird unsafe references. |
| 1076 if (offset == Type::OffsetBot && (tj->isa_instptr() /*|| tj->isa_klassptr()*/)) { | |
| 1077 assert(InlineUnsafeOps, "indeterminate pointers come only from unsafe ops"); | |
| 247 | 1078 assert(!is_known_inst, "scalarizable allocation should not have unsafe references"); |
| 0 | 1079 tj = TypeOopPtr::BOTTOM; |
| 1080 ptr = tj->ptr(); | |
| 1081 offset = tj->offset(); | |
| 1082 } | |
| 1083 | |
| 1084 // Array pointers need some flattening | |
| 1085 const TypeAryPtr *ta = tj->isa_aryptr(); | |
| 247 | 1086 if( ta && is_known_inst ) { |
| 1087 if ( offset != Type::OffsetBot && | |
| 1088 offset > arrayOopDesc::length_offset_in_bytes() ) { | |
| 1089 offset = Type::OffsetBot; // Flatten constant access into array body only | |
| 1090 tj = ta = TypeAryPtr::make(ptr, ta->ary(), ta->klass(), true, offset, ta->instance_id()); | |
| 1091 } | |
| 1092 } else if( ta && _AliasLevel >= 2 ) { | |
| 0 | 1093 // For arrays indexed by constant indices, we flatten the alias |
| 1094 // space to include all of the array body. Only the header, klass | |
| 1095 // and array length can be accessed un-aliased. | |
| 1096 if( offset != Type::OffsetBot ) { | |
| 1097 if( ta->const_oop() ) { // methodDataOop or methodOop | |
| 1098 offset = Type::OffsetBot; // Flatten constant access into array body | |
| 247 | 1099 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),ta->ary(),ta->klass(),false,offset); |
| 0 | 1100 } else if( offset == arrayOopDesc::length_offset_in_bytes() ) { |
| 1101 // range is OK as-is. | |
| 1102 tj = ta = TypeAryPtr::RANGE; | |
| 1103 } else if( offset == oopDesc::klass_offset_in_bytes() ) { | |
| 1104 tj = TypeInstPtr::KLASS; // all klass loads look alike | |
| 1105 ta = TypeAryPtr::RANGE; // generic ignored junk | |
| 1106 ptr = TypePtr::BotPTR; | |
| 1107 } else if( offset == oopDesc::mark_offset_in_bytes() ) { | |
| 1108 tj = TypeInstPtr::MARK; | |
| 1109 ta = TypeAryPtr::RANGE; // generic ignored junk | |
| 1110 ptr = TypePtr::BotPTR; | |
| 1111 } else { // Random constant offset into array body | |
| 1112 offset = Type::OffsetBot; // Flatten constant access into array body | |
| 247 | 1113 tj = ta = TypeAryPtr::make(ptr,ta->ary(),ta->klass(),false,offset); |
| 0 | 1114 } |
| 1115 } | |
| 1116 // Arrays of fixed size alias with arrays of unknown size. | |
| 1117 if (ta->size() != TypeInt::POS) { | |
| 1118 const TypeAry *tary = TypeAry::make(ta->elem(), TypeInt::POS); | |
| 247 | 1119 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,ta->klass(),false,offset); |
| 0 | 1120 } |
| 1121 // Arrays of known objects become arrays of unknown objects. | |
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1122 if (ta->elem()->isa_narrowoop() && ta->elem() != TypeNarrowOop::BOTTOM) { |
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1123 const TypeAry *tary = TypeAry::make(TypeNarrowOop::BOTTOM, ta->size()); |
| 247 | 1124 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset); |
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1125 } |
| 0 | 1126 if (ta->elem()->isa_oopptr() && ta->elem() != TypeInstPtr::BOTTOM) { |
| 1127 const TypeAry *tary = TypeAry::make(TypeInstPtr::BOTTOM, ta->size()); | |
| 247 | 1128 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset); |
| 0 | 1129 } |
| 1130 // Arrays of bytes and of booleans both use 'bastore' and 'baload' so | |
| 1131 // cannot be distinguished by bytecode alone. | |
| 1132 if (ta->elem() == TypeInt::BOOL) { | |
| 1133 const TypeAry *tary = TypeAry::make(TypeInt::BYTE, ta->size()); | |
| 1134 ciKlass* aklass = ciTypeArrayKlass::make(T_BYTE); | |
| 247 | 1135 tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,aklass,false,offset); |
| 0 | 1136 } |
| 1137 // During the 2nd round of IterGVN, NotNull castings are removed. | |
| 1138 // Make sure the Bottom and NotNull variants alias the same. | |
| 1139 // Also, make sure exact and non-exact variants alias the same. | |
| 1140 if( ptr == TypePtr::NotNull || ta->klass_is_exact() ) { | |
| 1141 if (ta->const_oop()) { | |
| 1142 tj = ta = TypeAryPtr::make(TypePtr::Constant,ta->const_oop(),ta->ary(),ta->klass(),false,offset); | |
| 1143 } else { | |
| 1144 tj = ta = TypeAryPtr::make(TypePtr::BotPTR,ta->ary(),ta->klass(),false,offset); | |
| 1145 } | |
| 1146 } | |
| 1147 } | |
| 1148 | |
| 1149 // Oop pointers need some flattening | |
| 1150 const TypeInstPtr *to = tj->isa_instptr(); | |
| 1151 if( to && _AliasLevel >= 2 && to != TypeOopPtr::BOTTOM ) { | |
| 1152 if( ptr == TypePtr::Constant ) { | |
| 1153 // No constant oop pointers (such as Strings); they alias with | |
| 1154 // unknown strings. | |
| 247 | 1155 assert(!is_known_inst, "not scalarizable allocation"); |
| 0 | 1156 tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset); |
| 247 | 1157 } else if( is_known_inst ) { |
| 163 | 1158 tj = to; // Keep NotNull and klass_is_exact for instance type |
| 0 | 1159 } else if( ptr == TypePtr::NotNull || to->klass_is_exact() ) { |
| 1160 // During the 2nd round of IterGVN, NotNull castings are removed. | |
| 1161 // Make sure the Bottom and NotNull variants alias the same. | |
| 1162 // Also, make sure exact and non-exact variants alias the same. | |
| 247 | 1163 tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset); |
| 0 | 1164 } |
| 1165 // Canonicalize the holder of this field | |
| 1166 ciInstanceKlass *k = to->klass()->as_instance_klass(); | |
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1167 if (offset >= 0 && offset < instanceOopDesc::base_offset_in_bytes()) { |
| 0 | 1168 // First handle header references such as a LoadKlassNode, even if the |
| 1169 // object's klass is unloaded at compile time (4965979). | |
| 247 | 1170 if (!is_known_inst) { // Do it only for non-instance types |
| 1171 tj = to = TypeInstPtr::make(TypePtr::BotPTR, env()->Object_klass(), false, NULL, offset); | |
| 1172 } | |
| 0 | 1173 } else if (offset < 0 || offset >= k->size_helper() * wordSize) { |
| 1174 to = NULL; | |
| 1175 tj = TypeOopPtr::BOTTOM; | |
| 1176 offset = tj->offset(); | |
| 1177 } else { | |
| 1178 ciInstanceKlass *canonical_holder = k->get_canonical_holder(offset); | |
| 1179 if (!k->equals(canonical_holder) || tj->offset() != offset) { | |
| 247 | 1180 if( is_known_inst ) { |
| 1181 tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, true, NULL, offset, to->instance_id()); | |
| 1182 } else { | |
| 1183 tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, false, NULL, offset); | |
| 1184 } | |
| 0 | 1185 } |
| 1186 } | |
| 1187 } | |
| 1188 | |
| 1189 // Klass pointers to object array klasses need some flattening | |
| 1190 const TypeKlassPtr *tk = tj->isa_klassptr(); | |
| 1191 if( tk ) { | |
| 1192 // If we are referencing a field within a Klass, we need | |
| 1193 // to assume the worst case of an Object. Both exact and | |
| 1194 // inexact types must flatten to the same alias class. | |
| 1195 // Since the flattened result for a klass is defined to be | |
| 1196 // precisely java.lang.Object, use a constant ptr. | |
| 1197 if ( offset == Type::OffsetBot || (offset >= 0 && (size_t)offset < sizeof(Klass)) ) { | |
| 1198 | |
| 1199 tj = tk = TypeKlassPtr::make(TypePtr::Constant, | |
| 1200 TypeKlassPtr::OBJECT->klass(), | |
| 1201 offset); | |
| 1202 } | |
| 1203 | |
| 1204 ciKlass* klass = tk->klass(); | |
| 1205 if( klass->is_obj_array_klass() ) { | |
| 1206 ciKlass* k = TypeAryPtr::OOPS->klass(); | |
| 1207 if( !k || !k->is_loaded() ) // Only fails for some -Xcomp runs | |
| 1208 k = TypeInstPtr::BOTTOM->klass(); | |
| 1209 tj = tk = TypeKlassPtr::make( TypePtr::NotNull, k, offset ); | |
| 1210 } | |
| 1211 | |
| 1212 // Check for precise loads from the primary supertype array and force them | |
| 1213 // to the supertype cache alias index. Check for generic array loads from | |
| 1214 // the primary supertype array and also force them to the supertype cache | |
| 1215 // alias index. Since the same load can reach both, we need to merge | |
| 1216 // these 2 disparate memories into the same alias class. Since the | |
| 1217 // primary supertype array is read-only, there's no chance of confusion | |
| 1218 // where we bypass an array load and an array store. | |
| 1219 uint off2 = offset - Klass::primary_supers_offset_in_bytes(); | |
| 1220 if( offset == Type::OffsetBot || | |
| 1221 off2 < Klass::primary_super_limit()*wordSize ) { | |
| 1222 offset = sizeof(oopDesc) +Klass::secondary_super_cache_offset_in_bytes(); | |
| 1223 tj = tk = TypeKlassPtr::make( TypePtr::NotNull, tk->klass(), offset ); | |
| 1224 } | |
| 1225 } | |
| 1226 | |
| 1227 // Flatten all Raw pointers together. | |
| 1228 if (tj->base() == Type::RawPtr) | |
| 1229 tj = TypeRawPtr::BOTTOM; | |
| 1230 | |
| 1231 if (tj->base() == Type::AnyPtr) | |
| 1232 tj = TypePtr::BOTTOM; // An error, which the caller must check for. | |
| 1233 | |
| 1234 // Flatten all to bottom for now | |
| 1235 switch( _AliasLevel ) { | |
| 1236 case 0: | |
| 1237 tj = TypePtr::BOTTOM; | |
| 1238 break; | |
| 1239 case 1: // Flatten to: oop, static, field or array | |
| 1240 switch (tj->base()) { | |
| 1241 //case Type::AryPtr: tj = TypeAryPtr::RANGE; break; | |
| 1242 case Type::RawPtr: tj = TypeRawPtr::BOTTOM; break; | |
| 1243 case Type::AryPtr: // do not distinguish arrays at all | |
| 1244 case Type::InstPtr: tj = TypeInstPtr::BOTTOM; break; | |
| 1245 case Type::KlassPtr: tj = TypeKlassPtr::OBJECT; break; | |
| 1246 case Type::AnyPtr: tj = TypePtr::BOTTOM; break; // caller checks it | |
| 1247 default: ShouldNotReachHere(); | |
| 1248 } | |
| 1249 break; | |
| 605 | 1250 case 2: // No collapsing at level 2; keep all splits |
| 1251 case 3: // No collapsing at level 3; keep all splits | |
| 0 | 1252 break; |
| 1253 default: | |
| 1254 Unimplemented(); | |
| 1255 } | |
| 1256 | |
| 1257 offset = tj->offset(); | |
| 1258 assert( offset != Type::OffsetTop, "Offset has fallen from constant" ); | |
| 1259 | |
| 1260 assert( (offset != Type::OffsetBot && tj->base() != Type::AryPtr) || | |
| 1261 (offset == Type::OffsetBot && tj->base() == Type::AryPtr) || | |
| 1262 (offset == Type::OffsetBot && tj == TypeOopPtr::BOTTOM) || | |
| 1263 (offset == Type::OffsetBot && tj == TypePtr::BOTTOM) || | |
| 1264 (offset == oopDesc::mark_offset_in_bytes() && tj->base() == Type::AryPtr) || | |
| 1265 (offset == oopDesc::klass_offset_in_bytes() && tj->base() == Type::AryPtr) || | |
| 1266 (offset == arrayOopDesc::length_offset_in_bytes() && tj->base() == Type::AryPtr) , | |
| 1267 "For oops, klasses, raw offset must be constant; for arrays the offset is never known" ); | |
| 1268 assert( tj->ptr() != TypePtr::TopPTR && | |
| 1269 tj->ptr() != TypePtr::AnyNull && | |
| 1270 tj->ptr() != TypePtr::Null, "No imprecise addresses" ); | |
| 1271 // assert( tj->ptr() != TypePtr::Constant || | |
| 1272 // tj->base() == Type::RawPtr || | |
| 1273 // tj->base() == Type::KlassPtr, "No constant oop addresses" ); | |
| 1274 | |
| 1275 return tj; | |
| 1276 } | |
| 1277 | |
| 1278 void Compile::AliasType::Init(int i, const TypePtr* at) { | |
| 1279 _index = i; | |
| 1280 _adr_type = at; | |
| 1281 _field = NULL; | |
| 1282 _is_rewritable = true; // default | |
| 1283 const TypeOopPtr *atoop = (at != NULL) ? at->isa_oopptr() : NULL; | |
| 223 | 1284 if (atoop != NULL && atoop->is_known_instance()) { |
| 1285 const TypeOopPtr *gt = atoop->cast_to_instance_id(TypeOopPtr::InstanceBot); | |
| 0 | 1286 _general_index = Compile::current()->get_alias_index(gt); |
| 1287 } else { | |
| 1288 _general_index = 0; | |
| 1289 } | |
| 1290 } | |
| 1291 | |
| 1292 //---------------------------------print_on------------------------------------ | |
| 1293 #ifndef PRODUCT | |
| 1294 void Compile::AliasType::print_on(outputStream* st) { | |
| 1295 if (index() < 10) | |
| 1296 st->print("@ <%d> ", index()); | |
| 1297 else st->print("@ <%d>", index()); | |
| 1298 st->print(is_rewritable() ? " " : " RO"); | |
| 1299 int offset = adr_type()->offset(); | |
| 1300 if (offset == Type::OffsetBot) | |
| 1301 st->print(" +any"); | |
| 1302 else st->print(" +%-3d", offset); | |
| 1303 st->print(" in "); | |
| 1304 adr_type()->dump_on(st); | |
| 1305 const TypeOopPtr* tjp = adr_type()->isa_oopptr(); | |
| 1306 if (field() != NULL && tjp) { | |
| 1307 if (tjp->klass() != field()->holder() || | |
| 1308 tjp->offset() != field()->offset_in_bytes()) { | |
| 1309 st->print(" != "); | |
| 1310 field()->print(); | |
| 1311 st->print(" ***"); | |
| 1312 } | |
| 1313 } | |
| 1314 } | |
| 1315 | |
| 1316 void print_alias_types() { | |
| 1317 Compile* C = Compile::current(); | |
| 1318 tty->print_cr("--- Alias types, AliasIdxBot .. %d", C->num_alias_types()-1); | |
| 1319 for (int idx = Compile::AliasIdxBot; idx < C->num_alias_types(); idx++) { | |
| 1320 C->alias_type(idx)->print_on(tty); | |
| 1321 tty->cr(); | |
| 1322 } | |
| 1323 } | |
| 1324 #endif | |
| 1325 | |
| 1326 | |
| 1327 //----------------------------probe_alias_cache-------------------------------- | |
| 1328 Compile::AliasCacheEntry* Compile::probe_alias_cache(const TypePtr* adr_type) { | |
| 1329 intptr_t key = (intptr_t) adr_type; | |
| 1330 key ^= key >> logAliasCacheSize; | |
| 1331 return &_alias_cache[key & right_n_bits(logAliasCacheSize)]; | |
| 1332 } | |
| 1333 | |
| 1334 | |
| 1335 //-----------------------------grow_alias_types-------------------------------- | |
| 1336 void Compile::grow_alias_types() { | |
| 1337 const int old_ats = _max_alias_types; // how many before? | |
| 1338 const int new_ats = old_ats; // how many more? | |
| 1339 const int grow_ats = old_ats+new_ats; // how many now? | |
| 1340 _max_alias_types = grow_ats; | |
| 1341 _alias_types = REALLOC_ARENA_ARRAY(comp_arena(), AliasType*, _alias_types, old_ats, grow_ats); | |
| 1342 AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, new_ats); | |
| 1343 Copy::zero_to_bytes(ats, sizeof(AliasType)*new_ats); | |
| 1344 for (int i = 0; i < new_ats; i++) _alias_types[old_ats+i] = &ats[i]; | |
| 1345 } | |
| 1346 | |
| 1347 | |
| 1348 //--------------------------------find_alias_type------------------------------ | |
| 1349 Compile::AliasType* Compile::find_alias_type(const TypePtr* adr_type, bool no_create) { | |
| 1350 if (_AliasLevel == 0) | |
| 1351 return alias_type(AliasIdxBot); | |
| 1352 | |
| 1353 AliasCacheEntry* ace = probe_alias_cache(adr_type); | |
| 1354 if (ace->_adr_type == adr_type) { | |
| 1355 return alias_type(ace->_index); | |
| 1356 } | |
| 1357 | |
| 1358 // Handle special cases. | |
| 1359 if (adr_type == NULL) return alias_type(AliasIdxTop); | |
| 1360 if (adr_type == TypePtr::BOTTOM) return alias_type(AliasIdxBot); | |
| 1361 | |
| 1362 // Do it the slow way. | |
| 1363 const TypePtr* flat = flatten_alias_type(adr_type); | |
| 1364 | |
| 1365 #ifdef ASSERT | |
| 1366 assert(flat == flatten_alias_type(flat), "idempotent"); | |
| 1367 assert(flat != TypePtr::BOTTOM, "cannot alias-analyze an untyped ptr"); | |
| 1368 if (flat->isa_oopptr() && !flat->isa_klassptr()) { | |
| 1369 const TypeOopPtr* foop = flat->is_oopptr(); | |
| 247 | 1370 // Scalarizable allocations have exact klass always. |
| 1371 bool exact = !foop->klass_is_exact() || foop->is_known_instance(); | |
| 1372 const TypePtr* xoop = foop->cast_to_exactness(exact)->is_ptr(); | |
| 0 | 1373 assert(foop == flatten_alias_type(xoop), "exactness must not affect alias type"); |
| 1374 } | |
| 1375 assert(flat == flatten_alias_type(flat), "exact bit doesn't matter"); | |
| 1376 #endif | |
| 1377 | |
| 1378 int idx = AliasIdxTop; | |
| 1379 for (int i = 0; i < num_alias_types(); i++) { | |
| 1380 if (alias_type(i)->adr_type() == flat) { | |
| 1381 idx = i; | |
| 1382 break; | |
| 1383 } | |
| 1384 } | |
| 1385 | |
| 1386 if (idx == AliasIdxTop) { | |
| 1387 if (no_create) return NULL; | |
| 1388 // Grow the array if necessary. | |
| 1389 if (_num_alias_types == _max_alias_types) grow_alias_types(); | |
| 1390 // Add a new alias type. | |
| 1391 idx = _num_alias_types++; | |
| 1392 _alias_types[idx]->Init(idx, flat); | |
| 1393 if (flat == TypeInstPtr::KLASS) alias_type(idx)->set_rewritable(false); | |
| 1394 if (flat == TypeAryPtr::RANGE) alias_type(idx)->set_rewritable(false); | |
| 1395 if (flat->isa_instptr()) { | |
| 1396 if (flat->offset() == java_lang_Class::klass_offset_in_bytes() | |
| 1397 && flat->is_instptr()->klass() == env()->Class_klass()) | |
| 1398 alias_type(idx)->set_rewritable(false); | |
| 1399 } | |
| 1400 if (flat->isa_klassptr()) { | |
| 1401 if (flat->offset() == Klass::super_check_offset_offset_in_bytes() + (int)sizeof(oopDesc)) | |
| 1402 alias_type(idx)->set_rewritable(false); | |
| 1403 if (flat->offset() == Klass::modifier_flags_offset_in_bytes() + (int)sizeof(oopDesc)) | |
| 1404 alias_type(idx)->set_rewritable(false); | |
| 1405 if (flat->offset() == Klass::access_flags_offset_in_bytes() + (int)sizeof(oopDesc)) | |
| 1406 alias_type(idx)->set_rewritable(false); | |
| 1407 if (flat->offset() == Klass::java_mirror_offset_in_bytes() + (int)sizeof(oopDesc)) | |
| 1408 alias_type(idx)->set_rewritable(false); | |
| 1409 } | |
| 1410 // %%% (We would like to finalize JavaThread::threadObj_offset(), | |
| 1411 // but the base pointer type is not distinctive enough to identify | |
| 1412 // references into JavaThread.) | |
| 1413 | |
| 1414 // Check for final instance fields. | |
| 1415 const TypeInstPtr* tinst = flat->isa_instptr(); | |
|
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changeset
|
1416 if (tinst && tinst->offset() >= instanceOopDesc::base_offset_in_bytes()) { |
| 0 | 1417 ciInstanceKlass *k = tinst->klass()->as_instance_klass(); |
| 1418 ciField* field = k->get_field_by_offset(tinst->offset(), false); | |
| 1419 // Set field() and is_rewritable() attributes. | |
| 1420 if (field != NULL) alias_type(idx)->set_field(field); | |
| 1421 } | |
| 1422 const TypeKlassPtr* tklass = flat->isa_klassptr(); | |
| 1423 // Check for final static fields. | |
| 1424 if (tklass && tklass->klass()->is_instance_klass()) { | |
| 1425 ciInstanceKlass *k = tklass->klass()->as_instance_klass(); | |
| 1426 ciField* field = k->get_field_by_offset(tklass->offset(), true); | |
| 1427 // Set field() and is_rewritable() attributes. | |
| 1428 if (field != NULL) alias_type(idx)->set_field(field); | |
| 1429 } | |
| 1430 } | |
| 1431 | |
| 1432 // Fill the cache for next time. | |
| 1433 ace->_adr_type = adr_type; | |
| 1434 ace->_index = idx; | |
| 1435 assert(alias_type(adr_type) == alias_type(idx), "type must be installed"); | |
| 1436 | |
| 1437 // Might as well try to fill the cache for the flattened version, too. | |
| 1438 AliasCacheEntry* face = probe_alias_cache(flat); | |
| 1439 if (face->_adr_type == NULL) { | |
| 1440 face->_adr_type = flat; | |
| 1441 face->_index = idx; | |
| 1442 assert(alias_type(flat) == alias_type(idx), "flat type must work too"); | |
| 1443 } | |
| 1444 | |
| 1445 return alias_type(idx); | |
| 1446 } | |
| 1447 | |
| 1448 | |
| 1449 Compile::AliasType* Compile::alias_type(ciField* field) { | |
| 1450 const TypeOopPtr* t; | |
| 1451 if (field->is_static()) | |
| 1452 t = TypeKlassPtr::make(field->holder()); | |
| 1453 else | |
| 1454 t = TypeOopPtr::make_from_klass_raw(field->holder()); | |
| 1455 AliasType* atp = alias_type(t->add_offset(field->offset_in_bytes())); | |
| 1456 assert(field->is_final() == !atp->is_rewritable(), "must get the rewritable bits correct"); | |
| 1457 return atp; | |
| 1458 } | |
| 1459 | |
| 1460 | |
| 1461 //------------------------------have_alias_type-------------------------------- | |
| 1462 bool Compile::have_alias_type(const TypePtr* adr_type) { | |
| 1463 AliasCacheEntry* ace = probe_alias_cache(adr_type); | |
| 1464 if (ace->_adr_type == adr_type) { | |
| 1465 return true; | |
| 1466 } | |
| 1467 | |
| 1468 // Handle special cases. | |
| 1469 if (adr_type == NULL) return true; | |
| 1470 if (adr_type == TypePtr::BOTTOM) return true; | |
| 1471 | |
| 1472 return find_alias_type(adr_type, true) != NULL; | |
| 1473 } | |
| 1474 | |
| 1475 //-----------------------------must_alias-------------------------------------- | |
| 1476 // True if all values of the given address type are in the given alias category. | |
| 1477 bool Compile::must_alias(const TypePtr* adr_type, int alias_idx) { | |
| 1478 if (alias_idx == AliasIdxBot) return true; // the universal category | |
| 1479 if (adr_type == NULL) return true; // NULL serves as TypePtr::TOP | |
| 1480 if (alias_idx == AliasIdxTop) return false; // the empty category | |
| 1481 if (adr_type->base() == Type::AnyPtr) return false; // TypePtr::BOTTOM or its twins | |
| 1482 | |
| 1483 // the only remaining possible overlap is identity | |
| 1484 int adr_idx = get_alias_index(adr_type); | |
| 1485 assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, ""); | |
| 1486 assert(adr_idx == alias_idx || | |
| 1487 (alias_type(alias_idx)->adr_type() != TypeOopPtr::BOTTOM | |
| 1488 && adr_type != TypeOopPtr::BOTTOM), | |
| 1489 "should not be testing for overlap with an unsafe pointer"); | |
| 1490 return adr_idx == alias_idx; | |
| 1491 } | |
| 1492 | |
| 1493 //------------------------------can_alias-------------------------------------- | |
| 1494 // True if any values of the given address type are in the given alias category. | |
| 1495 bool Compile::can_alias(const TypePtr* adr_type, int alias_idx) { | |
| 1496 if (alias_idx == AliasIdxTop) return false; // the empty category | |
| 1497 if (adr_type == NULL) return false; // NULL serves as TypePtr::TOP | |
| 1498 if (alias_idx == AliasIdxBot) return true; // the universal category | |
| 1499 if (adr_type->base() == Type::AnyPtr) return true; // TypePtr::BOTTOM or its twins | |
| 1500 | |
| 1501 // the only remaining possible overlap is identity | |
| 1502 int adr_idx = get_alias_index(adr_type); | |
| 1503 assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, ""); | |
| 1504 return adr_idx == alias_idx; | |
| 1505 } | |
| 1506 | |
| 1507 | |
| 1508 | |
| 1509 //---------------------------pop_warm_call------------------------------------- | |
| 1510 WarmCallInfo* Compile::pop_warm_call() { | |
| 1511 WarmCallInfo* wci = _warm_calls; | |
| 1512 if (wci != NULL) _warm_calls = wci->remove_from(wci); | |
| 1513 return wci; | |
| 1514 } | |
| 1515 | |
| 1516 //----------------------------Inline_Warm-------------------------------------- | |
| 1517 int Compile::Inline_Warm() { | |
| 1518 // If there is room, try to inline some more warm call sites. | |
| 1519 // %%% Do a graph index compaction pass when we think we're out of space? | |
| 1520 if (!InlineWarmCalls) return 0; | |
| 1521 | |
| 1522 int calls_made_hot = 0; | |
| 1523 int room_to_grow = NodeCountInliningCutoff - unique(); | |
| 1524 int amount_to_grow = MIN2(room_to_grow, (int)NodeCountInliningStep); | |
| 1525 int amount_grown = 0; | |
| 1526 WarmCallInfo* call; | |
| 1527 while (amount_to_grow > 0 && (call = pop_warm_call()) != NULL) { | |
| 1528 int est_size = (int)call->size(); | |
| 1529 if (est_size > (room_to_grow - amount_grown)) { | |
| 1530 // This one won't fit anyway. Get rid of it. | |
| 1531 call->make_cold(); | |
| 1532 continue; | |
| 1533 } | |
| 1534 call->make_hot(); | |
| 1535 calls_made_hot++; | |
| 1536 amount_grown += est_size; | |
| 1537 amount_to_grow -= est_size; | |
| 1538 } | |
| 1539 | |
| 1540 if (calls_made_hot > 0) set_major_progress(); | |
| 1541 return calls_made_hot; | |
| 1542 } | |
| 1543 | |
| 1544 | |
| 1545 //----------------------------Finish_Warm-------------------------------------- | |
| 1546 void Compile::Finish_Warm() { | |
| 1547 if (!InlineWarmCalls) return; | |
| 1548 if (failing()) return; | |
| 1549 if (warm_calls() == NULL) return; | |
| 1550 | |
| 1551 // Clean up loose ends, if we are out of space for inlining. | |
| 1552 WarmCallInfo* call; | |
| 1553 while ((call = pop_warm_call()) != NULL) { | |
| 1554 call->make_cold(); | |
| 1555 } | |
| 1556 } | |
| 1557 | |
| 1172 | 1558 //---------------------cleanup_loop_predicates----------------------- |
| 1559 // Remove the opaque nodes that protect the predicates so that all unused | |
| 1560 // checks and uncommon_traps will be eliminated from the ideal graph | |
| 1561 void Compile::cleanup_loop_predicates(PhaseIterGVN &igvn) { | |
| 1562 if (predicate_count()==0) return; | |
| 1563 for (int i = predicate_count(); i > 0; i--) { | |
| 1564 Node * n = predicate_opaque1_node(i-1); | |
| 1565 assert(n->Opcode() == Op_Opaque1, "must be"); | |
| 1566 igvn.replace_node(n, n->in(1)); | |
| 1567 } | |
| 1568 assert(predicate_count()==0, "should be clean!"); | |
| 1569 igvn.optimize(); | |
| 1570 } | |
| 0 | 1571 |
| 1572 //------------------------------Optimize--------------------------------------- | |
| 1573 // Given a graph, optimize it. | |
| 1574 void Compile::Optimize() { | |
| 1575 TracePhase t1("optimizer", &_t_optimizer, true); | |
| 1576 | |
| 1577 #ifndef PRODUCT | |
| 1578 if (env()->break_at_compile()) { | |
| 1579 BREAKPOINT; | |
| 1580 } | |
| 1581 | |
| 1582 #endif | |
| 1583 | |
| 1584 ResourceMark rm; | |
| 1585 int loop_opts_cnt; | |
| 1586 | |
| 1587 NOT_PRODUCT( verify_graph_edges(); ) | |
| 1588 | |
| 222 | 1589 print_method("After Parsing"); |
| 0 | 1590 |
| 1591 { | |
| 1592 // Iterative Global Value Numbering, including ideal transforms | |
| 1593 // Initialize IterGVN with types and values from parse-time GVN | |
| 1594 PhaseIterGVN igvn(initial_gvn()); | |
| 1595 { | |
| 1596 NOT_PRODUCT( TracePhase t2("iterGVN", &_t_iterGVN, TimeCompiler); ) | |
| 1597 igvn.optimize(); | |
| 1598 } | |
| 1599 | |
| 1600 print_method("Iter GVN 1", 2); | |
| 1601 | |
| 1602 if (failing()) return; | |
| 1603 | |
| 1604 // Loop transforms on the ideal graph. Range Check Elimination, | |
| 1605 // peeling, unrolling, etc. | |
| 1606 | |
| 1607 // Set loop opts counter | |
| 1608 loop_opts_cnt = num_loop_opts(); | |
| 1609 if((loop_opts_cnt > 0) && (has_loops() || has_split_ifs())) { | |
| 1610 { | |
| 1611 TracePhase t2("idealLoop", &_t_idealLoop, true); | |
| 1172 | 1612 PhaseIdealLoop ideal_loop( igvn, true, UseLoopPredicate); |
| 0 | 1613 loop_opts_cnt--; |
| 1614 if (major_progress()) print_method("PhaseIdealLoop 1", 2); | |
| 1615 if (failing()) return; | |
| 1616 } | |
| 1617 // Loop opts pass if partial peeling occurred in previous pass | |
| 1618 if(PartialPeelLoop && major_progress() && (loop_opts_cnt > 0)) { | |
| 1619 TracePhase t3("idealLoop", &_t_idealLoop, true); | |
| 1172 | 1620 PhaseIdealLoop ideal_loop( igvn, false, UseLoopPredicate); |
| 0 | 1621 loop_opts_cnt--; |
| 1622 if (major_progress()) print_method("PhaseIdealLoop 2", 2); | |
| 1623 if (failing()) return; | |
| 1624 } | |
| 1625 // Loop opts pass for loop-unrolling before CCP | |
| 1626 if(major_progress() && (loop_opts_cnt > 0)) { | |
| 1627 TracePhase t4("idealLoop", &_t_idealLoop, true); | |
| 1172 | 1628 PhaseIdealLoop ideal_loop( igvn, false, UseLoopPredicate); |
| 0 | 1629 loop_opts_cnt--; |
| 1630 if (major_progress()) print_method("PhaseIdealLoop 3", 2); | |
| 1631 } | |
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1632 if (!failing()) { |
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1633 // Verify that last round of loop opts produced a valid graph |
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1634 NOT_PRODUCT( TracePhase t2("idealLoopVerify", &_t_idealLoopVerify, TimeCompiler); ) |
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1635 PhaseIdealLoop::verify(igvn); |
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1636 } |
| 0 | 1637 } |
| 1638 if (failing()) return; | |
| 1639 | |
| 1640 // Conditional Constant Propagation; | |
| 1641 PhaseCCP ccp( &igvn ); | |
| 1642 assert( true, "Break here to ccp.dump_nodes_and_types(_root,999,1)"); | |
| 1643 { | |
| 1644 TracePhase t2("ccp", &_t_ccp, true); | |
| 1645 ccp.do_transform(); | |
| 1646 } | |
| 1647 print_method("PhaseCPP 1", 2); | |
| 1648 | |
| 1649 assert( true, "Break here to ccp.dump_old2new_map()"); | |
| 1650 | |
| 1651 // Iterative Global Value Numbering, including ideal transforms | |
| 1652 { | |
| 1653 NOT_PRODUCT( TracePhase t2("iterGVN2", &_t_iterGVN2, TimeCompiler); ) | |
| 1654 igvn = ccp; | |
| 1655 igvn.optimize(); | |
| 1656 } | |
| 1657 | |
| 1658 print_method("Iter GVN 2", 2); | |
| 1659 | |
| 1660 if (failing()) return; | |
| 1661 | |
| 1662 // Loop transforms on the ideal graph. Range Check Elimination, | |
| 1663 // peeling, unrolling, etc. | |
| 1664 if(loop_opts_cnt > 0) { | |
| 1665 debug_only( int cnt = 0; ); | |
| 1172 | 1666 bool loop_predication = UseLoopPredicate; |
| 0 | 1667 while(major_progress() && (loop_opts_cnt > 0)) { |
| 1668 TracePhase t2("idealLoop", &_t_idealLoop, true); | |
| 1669 assert( cnt++ < 40, "infinite cycle in loop optimization" ); | |
| 1172 | 1670 PhaseIdealLoop ideal_loop( igvn, true, loop_predication); |
| 0 | 1671 loop_opts_cnt--; |
| 1672 if (major_progress()) print_method("PhaseIdealLoop iterations", 2); | |
| 1673 if (failing()) return; | |
| 1172 | 1674 // Perform loop predication optimization during first iteration after CCP. |
| 1675 // After that switch it off and cleanup unused loop predicates. | |
| 1676 if (loop_predication) { | |
| 1677 loop_predication = false; | |
| 1678 cleanup_loop_predicates(igvn); | |
| 1679 if (failing()) return; | |
| 1680 } | |
| 0 | 1681 } |
| 1682 } | |
|
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1683 |
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1684 { |
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1685 // Verify that all previous optimizations produced a valid graph |
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1686 // at least to this point, even if no loop optimizations were done. |
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1687 NOT_PRODUCT( TracePhase t2("idealLoopVerify", &_t_idealLoopVerify, TimeCompiler); ) |
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1688 PhaseIdealLoop::verify(igvn); |
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1689 } |
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1690 |
| 0 | 1691 { |
| 1692 NOT_PRODUCT( TracePhase t2("macroExpand", &_t_macroExpand, TimeCompiler); ) | |
| 1693 PhaseMacroExpand mex(igvn); | |
| 1694 if (mex.expand_macro_nodes()) { | |
| 1695 assert(failing(), "must bail out w/ explicit message"); | |
| 1696 return; | |
| 1697 } | |
| 1698 } | |
| 1699 | |
| 1700 } // (End scope of igvn; run destructor if necessary for asserts.) | |
| 1701 | |
| 1702 // A method with only infinite loops has no edges entering loops from root | |
| 1703 { | |
| 1704 NOT_PRODUCT( TracePhase t2("graphReshape", &_t_graphReshaping, TimeCompiler); ) | |
| 1705 if (final_graph_reshaping()) { | |
| 1706 assert(failing(), "must bail out w/ explicit message"); | |
| 1707 return; | |
| 1708 } | |
| 1709 } | |
| 1710 | |
| 1711 print_method("Optimize finished", 2); | |
| 1712 } | |
| 1713 | |
| 1714 | |
| 1715 //------------------------------Code_Gen--------------------------------------- | |
| 1716 // Given a graph, generate code for it | |
| 1717 void Compile::Code_Gen() { | |
| 1718 if (failing()) return; | |
| 1719 | |
| 1720 // Perform instruction selection. You might think we could reclaim Matcher | |
| 1721 // memory PDQ, but actually the Matcher is used in generating spill code. | |
| 1722 // Internals of the Matcher (including some VectorSets) must remain live | |
| 1723 // for awhile - thus I cannot reclaim Matcher memory lest a VectorSet usage | |
| 1724 // set a bit in reclaimed memory. | |
| 1725 | |
| 1726 // In debug mode can dump m._nodes.dump() for mapping of ideal to machine | |
| 1727 // nodes. Mapping is only valid at the root of each matched subtree. | |
| 1728 NOT_PRODUCT( verify_graph_edges(); ) | |
| 1729 | |
| 1730 Node_List proj_list; | |
| 1731 Matcher m(proj_list); | |
| 1732 _matcher = &m; | |
| 1733 { | |
| 1734 TracePhase t2("matcher", &_t_matcher, true); | |
| 1735 m.match(); | |
| 1736 } | |
| 1737 // In debug mode can dump m._nodes.dump() for mapping of ideal to machine | |
| 1738 // nodes. Mapping is only valid at the root of each matched subtree. | |
| 1739 NOT_PRODUCT( verify_graph_edges(); ) | |
| 1740 | |
| 1741 // If you have too many nodes, or if matching has failed, bail out | |
| 1742 check_node_count(0, "out of nodes matching instructions"); | |
| 1743 if (failing()) return; | |
| 1744 | |
| 1745 // Build a proper-looking CFG | |
| 1746 PhaseCFG cfg(node_arena(), root(), m); | |
| 1747 _cfg = &cfg; | |
| 1748 { | |
| 1749 NOT_PRODUCT( TracePhase t2("scheduler", &_t_scheduler, TimeCompiler); ) | |
| 1750 cfg.Dominators(); | |
| 1751 if (failing()) return; | |
| 1752 | |
| 1753 NOT_PRODUCT( verify_graph_edges(); ) | |
| 1754 | |
| 1755 cfg.Estimate_Block_Frequency(); | |
| 1756 cfg.GlobalCodeMotion(m,unique(),proj_list); | |
| 1757 | |
| 1758 print_method("Global code motion", 2); | |
| 1759 | |
| 1760 if (failing()) return; | |
| 1761 NOT_PRODUCT( verify_graph_edges(); ) | |
| 1762 | |
| 1763 debug_only( cfg.verify(); ) | |
| 1764 } | |
| 1765 NOT_PRODUCT( verify_graph_edges(); ) | |
| 1766 | |
| 1767 PhaseChaitin regalloc(unique(),cfg,m); | |
| 1768 _regalloc = ®alloc; | |
| 1769 { | |
| 1770 TracePhase t2("regalloc", &_t_registerAllocation, true); | |
| 1771 // Perform any platform dependent preallocation actions. This is used, | |
| 1772 // for example, to avoid taking an implicit null pointer exception | |
| 1773 // using the frame pointer on win95. | |
| 1774 _regalloc->pd_preallocate_hook(); | |
| 1775 | |
| 1776 // Perform register allocation. After Chaitin, use-def chains are | |
| 1777 // no longer accurate (at spill code) and so must be ignored. | |
| 1778 // Node->LRG->reg mappings are still accurate. | |
| 1779 _regalloc->Register_Allocate(); | |
| 1780 | |
| 1781 // Bail out if the allocator builds too many nodes | |
| 1782 if (failing()) return; | |
| 1783 } | |
| 1784 | |
| 1785 // Prior to register allocation we kept empty basic blocks in case the | |
| 1786 // the allocator needed a place to spill. After register allocation we | |
| 1787 // are not adding any new instructions. If any basic block is empty, we | |
| 1788 // can now safely remove it. | |
| 1789 { | |
| 418 | 1790 NOT_PRODUCT( TracePhase t2("blockOrdering", &_t_blockOrdering, TimeCompiler); ) |
| 1791 cfg.remove_empty(); | |
| 1792 if (do_freq_based_layout()) { | |
| 1793 PhaseBlockLayout layout(cfg); | |
| 1794 } else { | |
| 1795 cfg.set_loop_alignment(); | |
| 1796 } | |
| 1797 cfg.fixup_flow(); | |
| 0 | 1798 } |
| 1799 | |
| 1800 // Perform any platform dependent postallocation verifications. | |
| 1801 debug_only( _regalloc->pd_postallocate_verify_hook(); ) | |
| 1802 | |
| 1803 // Apply peephole optimizations | |
| 1804 if( OptoPeephole ) { | |
| 1805 NOT_PRODUCT( TracePhase t2("peephole", &_t_peephole, TimeCompiler); ) | |
| 1806 PhasePeephole peep( _regalloc, cfg); | |
| 1807 peep.do_transform(); | |
| 1808 } | |
| 1809 | |
| 1810 // Convert Nodes to instruction bits in a buffer | |
| 1811 { | |
| 1812 // %%%% workspace merge brought two timers together for one job | |
| 1813 TracePhase t2a("output", &_t_output, true); | |
| 1814 NOT_PRODUCT( TraceTime t2b(NULL, &_t_codeGeneration, TimeCompiler, false); ) | |
| 1815 Output(); | |
| 1816 } | |
| 1817 | |
| 222 | 1818 print_method("Final Code"); |
| 0 | 1819 |
| 1820 // He's dead, Jim. | |
| 1821 _cfg = (PhaseCFG*)0xdeadbeef; | |
| 1822 _regalloc = (PhaseChaitin*)0xdeadbeef; | |
| 1823 } | |
| 1824 | |
| 1825 | |
| 1826 //------------------------------dump_asm--------------------------------------- | |
| 1827 // Dump formatted assembly | |
| 1828 #ifndef PRODUCT | |
| 1829 void Compile::dump_asm(int *pcs, uint pc_limit) { | |
| 1830 bool cut_short = false; | |
| 1831 tty->print_cr("#"); | |
| 1832 tty->print("# "); _tf->dump(); tty->cr(); | |
| 1833 tty->print_cr("#"); | |
| 1834 | |
| 1835 // For all blocks | |
| 1836 int pc = 0x0; // Program counter | |
| 1837 char starts_bundle = ' '; | |
| 1838 _regalloc->dump_frame(); | |
| 1839 | |
| 1840 Node *n = NULL; | |
| 1841 for( uint i=0; i<_cfg->_num_blocks; i++ ) { | |
| 1842 if (VMThread::should_terminate()) { cut_short = true; break; } | |
| 1843 Block *b = _cfg->_blocks[i]; | |
| 1844 if (b->is_connector() && !Verbose) continue; | |
| 1845 n = b->_nodes[0]; | |
| 1846 if (pcs && n->_idx < pc_limit) | |
| 1847 tty->print("%3.3x ", pcs[n->_idx]); | |
| 1848 else | |
| 1849 tty->print(" "); | |
| 1850 b->dump_head( &_cfg->_bbs ); | |
| 1851 if (b->is_connector()) { | |
| 1852 tty->print_cr(" # Empty connector block"); | |
| 1853 } else if (b->num_preds() == 2 && b->pred(1)->is_CatchProj() && b->pred(1)->as_CatchProj()->_con == CatchProjNode::fall_through_index) { | |
| 1854 tty->print_cr(" # Block is sole successor of call"); | |
| 1855 } | |
| 1856 | |
| 1857 // For all instructions | |
| 1858 Node *delay = NULL; | |
| 1859 for( uint j = 0; j<b->_nodes.size(); j++ ) { | |
| 1860 if (VMThread::should_terminate()) { cut_short = true; break; } | |
| 1861 n = b->_nodes[j]; | |
| 1862 if (valid_bundle_info(n)) { | |
| 1863 Bundle *bundle = node_bundling(n); | |
| 1864 if (bundle->used_in_unconditional_delay()) { | |
| 1865 delay = n; | |
| 1866 continue; | |
| 1867 } | |
| 1868 if (bundle->starts_bundle()) | |
| 1869 starts_bundle = '+'; | |
| 1870 } | |
| 1871 | |
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1872 if (WizardMode) n->dump(); |
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1873 |
| 0 | 1874 if( !n->is_Region() && // Dont print in the Assembly |
| 1875 !n->is_Phi() && // a few noisely useless nodes | |
| 1876 !n->is_Proj() && | |
| 1877 !n->is_MachTemp() && | |
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1878 !n->is_SafePointScalarObject() && |
| 0 | 1879 !n->is_Catch() && // Would be nice to print exception table targets |
| 1880 !n->is_MergeMem() && // Not very interesting | |
| 1881 !n->is_top() && // Debug info table constants | |
| 1882 !(n->is_Con() && !n->is_Mach())// Debug info table constants | |
| 1883 ) { | |
| 1884 if (pcs && n->_idx < pc_limit) | |
| 1885 tty->print("%3.3x", pcs[n->_idx]); | |
| 1886 else | |
| 1887 tty->print(" "); | |
| 1888 tty->print(" %c ", starts_bundle); | |
| 1889 starts_bundle = ' '; | |
| 1890 tty->print("\t"); | |
| 1891 n->format(_regalloc, tty); | |
| 1892 tty->cr(); | |
| 1893 } | |
| 1894 | |
| 1895 // If we have an instruction with a delay slot, and have seen a delay, | |
| 1896 // then back up and print it | |
| 1897 if (valid_bundle_info(n) && node_bundling(n)->use_unconditional_delay()) { | |
| 1898 assert(delay != NULL, "no unconditional delay instruction"); | |
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1899 if (WizardMode) delay->dump(); |
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1900 |
| 0 | 1901 if (node_bundling(delay)->starts_bundle()) |
| 1902 starts_bundle = '+'; | |
| 1903 if (pcs && n->_idx < pc_limit) | |
| 1904 tty->print("%3.3x", pcs[n->_idx]); | |
| 1905 else | |
| 1906 tty->print(" "); | |
| 1907 tty->print(" %c ", starts_bundle); | |
| 1908 starts_bundle = ' '; | |
| 1909 tty->print("\t"); | |
| 1910 delay->format(_regalloc, tty); | |
| 1911 tty->print_cr(""); | |
| 1912 delay = NULL; | |
| 1913 } | |
| 1914 | |
| 1915 // Dump the exception table as well | |
| 1916 if( n->is_Catch() && (Verbose || WizardMode) ) { | |
| 1917 // Print the exception table for this offset | |
| 1918 _handler_table.print_subtable_for(pc); | |
| 1919 } | |
| 1920 } | |
| 1921 | |
| 1922 if (pcs && n->_idx < pc_limit) | |
| 1923 tty->print_cr("%3.3x", pcs[n->_idx]); | |
| 1924 else | |
| 1925 tty->print_cr(""); | |
| 1926 | |
| 1927 assert(cut_short || delay == NULL, "no unconditional delay branch"); | |
| 1928 | |
| 1929 } // End of per-block dump | |
| 1930 tty->print_cr(""); | |
| 1931 | |
| 1932 if (cut_short) tty->print_cr("*** disassembly is cut short ***"); | |
| 1933 } | |
| 1934 #endif | |
| 1935 | |
| 1936 //------------------------------Final_Reshape_Counts--------------------------- | |
| 1937 // This class defines counters to help identify when a method | |
| 1938 // may/must be executed using hardware with only 24-bit precision. | |
| 1939 struct Final_Reshape_Counts : public StackObj { | |
| 1940 int _call_count; // count non-inlined 'common' calls | |
| 1941 int _float_count; // count float ops requiring 24-bit precision | |
| 1942 int _double_count; // count double ops requiring more precision | |
| 1943 int _java_call_count; // count non-inlined 'java' calls | |
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1944 int _inner_loop_count; // count loops which need alignment |
| 0 | 1945 VectorSet _visited; // Visitation flags |
| 1946 Node_List _tests; // Set of IfNodes & PCTableNodes | |
| 1947 | |
| 1948 Final_Reshape_Counts() : | |
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1949 _call_count(0), _float_count(0), _double_count(0), |
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1950 _java_call_count(0), _inner_loop_count(0), |
| 0 | 1951 _visited( Thread::current()->resource_area() ) { } |
| 1952 | |
| 1953 void inc_call_count () { _call_count ++; } | |
| 1954 void inc_float_count () { _float_count ++; } | |
| 1955 void inc_double_count() { _double_count++; } | |
| 1956 void inc_java_call_count() { _java_call_count++; } | |
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1957 void inc_inner_loop_count() { _inner_loop_count++; } |
| 0 | 1958 |
| 1959 int get_call_count () const { return _call_count ; } | |
| 1960 int get_float_count () const { return _float_count ; } | |
| 1961 int get_double_count() const { return _double_count; } | |
| 1962 int get_java_call_count() const { return _java_call_count; } | |
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1963 int get_inner_loop_count() const { return _inner_loop_count; } |
| 0 | 1964 }; |
| 1965 | |
| 1966 static bool oop_offset_is_sane(const TypeInstPtr* tp) { | |
| 1967 ciInstanceKlass *k = tp->klass()->as_instance_klass(); | |
| 1968 // Make sure the offset goes inside the instance layout. | |
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1969 return k->contains_field_offset(tp->offset()); |
| 0 | 1970 // Note that OffsetBot and OffsetTop are very negative. |
| 1971 } | |
| 1972 | |
| 1973 //------------------------------final_graph_reshaping_impl---------------------- | |
| 1974 // Implement items 1-5 from final_graph_reshaping below. | |
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1975 static void final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc ) { |
| 0 | 1976 |
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1977 if ( n->outcnt() == 0 ) return; // dead node |
| 0 | 1978 uint nop = n->Opcode(); |
| 1979 | |
| 1980 // Check for 2-input instruction with "last use" on right input. | |
| 1981 // Swap to left input. Implements item (2). | |
| 1982 if( n->req() == 3 && // two-input instruction | |
| 1983 n->in(1)->outcnt() > 1 && // left use is NOT a last use | |
| 1984 (!n->in(1)->is_Phi() || n->in(1)->in(2) != n) && // it is not data loop | |
| 1985 n->in(2)->outcnt() == 1 &&// right use IS a last use | |
| 1986 !n->in(2)->is_Con() ) { // right use is not a constant | |
| 1987 // Check for commutative opcode | |
| 1988 switch( nop ) { | |
| 1989 case Op_AddI: case Op_AddF: case Op_AddD: case Op_AddL: | |
| 1990 case Op_MaxI: case Op_MinI: | |
| 1991 case Op_MulI: case Op_MulF: case Op_MulD: case Op_MulL: | |
| 1992 case Op_AndL: case Op_XorL: case Op_OrL: | |
| 1993 case Op_AndI: case Op_XorI: case Op_OrI: { | |
| 1994 // Move "last use" input to left by swapping inputs | |
| 1995 n->swap_edges(1, 2); | |
| 1996 break; | |
| 1997 } | |
| 1998 default: | |
| 1999 break; | |
| 2000 } | |
| 2001 } | |
| 2002 | |
| 2003 // Count FPU ops and common calls, implements item (3) | |
| 2004 switch( nop ) { | |
| 2005 // Count all float operations that may use FPU | |
| 2006 case Op_AddF: | |
| 2007 case Op_SubF: | |
| 2008 case Op_MulF: | |
| 2009 case Op_DivF: | |
| 2010 case Op_NegF: | |
| 2011 case Op_ModF: | |
| 2012 case Op_ConvI2F: | |
| 2013 case Op_ConF: | |
| 2014 case Op_CmpF: | |
| 2015 case Op_CmpF3: | |
| 2016 // case Op_ConvL2F: // longs are split into 32-bit halves | |
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2017 frc.inc_float_count(); |
| 0 | 2018 break; |
| 2019 | |
| 2020 case Op_ConvF2D: | |
| 2021 case Op_ConvD2F: | |
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2022 frc.inc_float_count(); |
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2023 frc.inc_double_count(); |
| 0 | 2024 break; |
| 2025 | |
| 2026 // Count all double operations that may use FPU | |
| 2027 case Op_AddD: | |
| 2028 case Op_SubD: | |
| 2029 case Op_MulD: | |
| 2030 case Op_DivD: | |
| 2031 case Op_NegD: | |
| 2032 case Op_ModD: | |
| 2033 case Op_ConvI2D: | |
| 2034 case Op_ConvD2I: | |
| 2035 // case Op_ConvL2D: // handled by leaf call | |
| 2036 // case Op_ConvD2L: // handled by leaf call | |
| 2037 case Op_ConD: | |
| 2038 case Op_CmpD: | |
| 2039 case Op_CmpD3: | |
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2040 frc.inc_double_count(); |
| 0 | 2041 break; |
| 2042 case Op_Opaque1: // Remove Opaque Nodes before matching | |
| 2043 case Op_Opaque2: // Remove Opaque Nodes before matching | |
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2044 n->subsume_by(n->in(1)); |
| 0 | 2045 break; |
| 2046 case Op_CallStaticJava: | |
| 2047 case Op_CallJava: | |
| 2048 case Op_CallDynamicJava: | |
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2049 frc.inc_java_call_count(); // Count java call site; |
| 0 | 2050 case Op_CallRuntime: |
| 2051 case Op_CallLeaf: | |
| 2052 case Op_CallLeafNoFP: { | |
| 2053 assert( n->is_Call(), "" ); | |
| 2054 CallNode *call = n->as_Call(); | |
| 2055 // Count call sites where the FP mode bit would have to be flipped. | |
| 2056 // Do not count uncommon runtime calls: | |
| 2057 // uncommon_trap, _complete_monitor_locking, _complete_monitor_unlocking, | |
| 2058 // _new_Java, _new_typeArray, _new_objArray, _rethrow_Java, ... | |
| 2059 if( !call->is_CallStaticJava() || !call->as_CallStaticJava()->_name ) { | |
|
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|
2060 frc.inc_call_count(); // Count the call site |
| 0 | 2061 } else { // See if uncommon argument is shared |
| 2062 Node *n = call->in(TypeFunc::Parms); | |
| 2063 int nop = n->Opcode(); | |
| 2064 // Clone shared simple arguments to uncommon calls, item (1). | |
| 2065 if( n->outcnt() > 1 && | |
| 2066 !n->is_Proj() && | |
| 2067 nop != Op_CreateEx && | |
| 2068 nop != Op_CheckCastPP && | |
|
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|
2069 nop != Op_DecodeN && |
| 0 | 2070 !n->is_Mem() ) { |
| 2071 Node *x = n->clone(); | |
| 2072 call->set_req( TypeFunc::Parms, x ); | |
| 2073 } | |
| 2074 } | |
| 2075 break; | |
| 2076 } | |
| 2077 | |
| 2078 case Op_StoreD: | |
| 2079 case Op_LoadD: | |
| 2080 case Op_LoadD_unaligned: | |
|
859
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|
2081 frc.inc_double_count(); |
| 0 | 2082 goto handle_mem; |
| 2083 case Op_StoreF: | |
| 2084 case Op_LoadF: | |
|
859
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|
2085 frc.inc_float_count(); |
| 0 | 2086 goto handle_mem; |
| 2087 | |
| 2088 case Op_StoreB: | |
| 2089 case Op_StoreC: | |
| 2090 case Op_StoreCM: | |
| 2091 case Op_StorePConditional: | |
| 2092 case Op_StoreI: | |
| 2093 case Op_StoreL: | |
|
420
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6462850: generate biased locking code in C2 ideal graph
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|
2094 case Op_StoreIConditional: |
| 0 | 2095 case Op_StoreLConditional: |
| 2096 case Op_CompareAndSwapI: | |
| 2097 case Op_CompareAndSwapL: | |
| 2098 case Op_CompareAndSwapP: | |
|
113
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|
2099 case Op_CompareAndSwapN: |
| 0 | 2100 case Op_StoreP: |
|
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|
2101 case Op_StoreN: |
| 0 | 2102 case Op_LoadB: |
| 624 | 2103 case Op_LoadUB: |
|
558
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|
2104 case Op_LoadUS: |
| 0 | 2105 case Op_LoadI: |
| 624 | 2106 case Op_LoadUI2L: |
| 0 | 2107 case Op_LoadKlass: |
|
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|
2108 case Op_LoadNKlass: |
| 0 | 2109 case Op_LoadL: |
| 2110 case Op_LoadL_unaligned: | |
| 2111 case Op_LoadPLocked: | |
| 2112 case Op_LoadLLocked: | |
| 2113 case Op_LoadP: | |
|
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|
2114 case Op_LoadN: |
| 0 | 2115 case Op_LoadRange: |
| 2116 case Op_LoadS: { | |
| 2117 handle_mem: | |
| 2118 #ifdef ASSERT | |
| 2119 if( VerifyOptoOopOffsets ) { | |
| 2120 assert( n->is_Mem(), "" ); | |
| 2121 MemNode *mem = (MemNode*)n; | |
| 2122 // Check to see if address types have grounded out somehow. | |
| 2123 const TypeInstPtr *tp = mem->in(MemNode::Address)->bottom_type()->isa_instptr(); | |
| 2124 assert( !tp || oop_offset_is_sane(tp), "" ); | |
| 2125 } | |
| 2126 #endif | |
| 2127 break; | |
| 2128 } | |
| 2129 | |
| 2130 case Op_AddP: { // Assert sane base pointers | |
|
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|
2131 Node *addp = n->in(AddPNode::Address); |
| 0 | 2132 assert( !addp->is_AddP() || |
| 2133 addp->in(AddPNode::Base)->is_top() || // Top OK for allocation | |
| 2134 addp->in(AddPNode::Base) == n->in(AddPNode::Base), | |
| 2135 "Base pointers must match" ); | |
|
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|
2136 #ifdef _LP64 |
|
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|
2137 if (UseCompressedOops && |
|
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|
2138 addp->Opcode() == Op_ConP && |
|
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|
2139 addp == n->in(AddPNode::Base) && |
|
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2140 n->in(AddPNode::Offset)->is_Con()) { |
|
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|
2141 // Use addressing with narrow klass to load with offset on x86. |
|
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2142 // On sparc loading 32-bits constant and decoding it have less |
|
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2143 // instructions (4) then load 64-bits constant (7). |
|
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|
2144 // Do this transformation here since IGVN will convert ConN back to ConP. |
|
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|
2145 const Type* t = addp->bottom_type(); |
|
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|
2146 if (t->isa_oopptr()) { |
|
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|
2147 Node* nn = NULL; |
|
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|
2148 |
|
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|
2149 // Look for existing ConN node of the same exact type. |
|
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|
2150 Compile* C = Compile::current(); |
|
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|
2151 Node* r = C->root(); |
|
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|
2152 uint cnt = r->outcnt(); |
|
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|
2153 for (uint i = 0; i < cnt; i++) { |
|
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|
2154 Node* m = r->raw_out(i); |
|
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|
2155 if (m!= NULL && m->Opcode() == Op_ConN && |
|
221
1e026f8da827
6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
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|
2156 m->bottom_type()->make_ptr() == t) { |
|
182
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|
2157 nn = m; |
|
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|
2158 break; |
|
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|
2159 } |
|
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|
2160 } |
|
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|
2161 if (nn != NULL) { |
|
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|
2162 // Decode a narrow oop to match address |
|
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|
2163 // [R12 + narrow_oop_reg<<3 + offset] |
|
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|
2164 nn = new (C, 2) DecodeNNode(nn, t); |
|
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|
2165 n->set_req(AddPNode::Base, nn); |
|
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|
2166 n->set_req(AddPNode::Address, nn); |
|
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|
2167 if (addp->outcnt() == 0) { |
|
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|
2168 addp->disconnect_inputs(NULL); |
|
44abbb0d4c18
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|
2169 } |
|
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|
2170 } |
|
44abbb0d4c18
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|
2171 } |
|
44abbb0d4c18
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|
2172 } |
|
44abbb0d4c18
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|
2173 #endif |
| 0 | 2174 break; |
| 2175 } | |
| 2176 | |
|
164
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|
2177 #ifdef _LP64 |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
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|
2178 case Op_CastPP: |
|
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
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1397
diff
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|
2179 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
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|
2180 Compile* C = Compile::current(); |
|
36ccc817fca4
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|
2181 Node* in1 = n->in(1); |
|
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|
2182 const Type* t = n->bottom_type(); |
|
36ccc817fca4
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|
2183 Node* new_in1 = in1->clone(); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
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|
2184 new_in1->as_DecodeN()->set_type(t); |
|
36ccc817fca4
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367
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|
2185 |
|
1575
3657cb01ffc5
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diff
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|
2186 if (!Matcher::narrow_oop_use_complex_address()) { |
|
368
36ccc817fca4
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|
2187 // |
|
36ccc817fca4
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diff
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|
2188 // x86, ARM and friends can handle 2 adds in addressing mode |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
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|
2189 // and Matcher can fold a DecodeN node into address by using |
|
36ccc817fca4
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diff
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|
2190 // a narrow oop directly and do implicit NULL check in address: |
|
36ccc817fca4
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diff
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|
2191 // |
|
36ccc817fca4
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367
diff
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|
2192 // [R12 + narrow_oop_reg<<3 + offset] |
|
36ccc817fca4
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|
2193 // NullCheck narrow_oop_reg |
|
36ccc817fca4
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|
2194 // |
|
36ccc817fca4
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|
2195 // On other platforms (Sparc) we have to keep new DecodeN node and |
|
36ccc817fca4
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|
2196 // use it to do implicit NULL check in address: |
|
36ccc817fca4
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|
2197 // |
|
36ccc817fca4
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|
2198 // decode_not_null narrow_oop_reg, base_reg |
|
36ccc817fca4
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|
2199 // [base_reg + offset] |
|
36ccc817fca4
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367
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|
2200 // NullCheck base_reg |
|
36ccc817fca4
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|
2201 // |
| 605 | 2202 // Pin the new DecodeN node to non-null path on these platform (Sparc) |
|
368
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|
2203 // to keep the information to which NULL check the new DecodeN node |
|
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|
2204 // corresponds to use it as value in implicit_null_check(). |
|
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|
2205 // |
|
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|
2206 new_in1->set_req(0, n->in(0)); |
|
36ccc817fca4
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|
2207 } |
|
36ccc817fca4
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|
2208 |
|
36ccc817fca4
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|
2209 n->subsume_by(new_in1); |
|
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|
2210 if (in1->outcnt() == 0) { |
|
36ccc817fca4
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|
2211 in1->disconnect_inputs(NULL); |
|
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|
2212 } |
|
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|
2213 } |
|
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|
2214 break; |
|
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|
2215 |
|
164
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|
2216 case Op_CmpP: |
|
168
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|
2217 // Do this transformation here to preserve CmpPNode::sub() and |
|
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|
2218 // other TypePtr related Ideal optimizations (for example, ptr nullness). |
|
331
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2219 if (n->in(1)->is_DecodeN() || n->in(2)->is_DecodeN()) { |
|
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|
2220 Node* in1 = n->in(1); |
|
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|
2221 Node* in2 = n->in(2); |
|
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|
2222 if (!in1->is_DecodeN()) { |
|
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|
2223 in2 = in1; |
|
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|
2224 in1 = n->in(2); |
|
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|
2225 } |
|
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|
2226 assert(in1->is_DecodeN(), "sanity"); |
|
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|
2227 |
|
164
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|
2228 Compile* C = Compile::current(); |
|
331
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|
2229 Node* new_in2 = NULL; |
|
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|
2230 if (in2->is_DecodeN()) { |
|
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|
2231 new_in2 = in2->in(1); |
|
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|
2232 } else if (in2->Opcode() == Op_ConP) { |
|
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|
2233 const Type* t = in2->bottom_type(); |
|
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2234 if (t == TypePtr::NULL_PTR) { |
|
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2235 // 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
|
2236 // oops implicit null check is not generated. |
|
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2237 // 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
|
2238 if (Matcher::gen_narrow_oop_implicit_null_checks()) |
|
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2239 new_in2 = ConNode::make(C, TypeNarrowOop::NULL_PTR); |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2240 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2241 // This transformation together with CastPP transformation above |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2242 // 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
|
2243 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2244 // The original code after Optimize() |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2245 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2246 // LoadN memory, narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2247 // decode narrow_oop_reg, base_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2248 // CmpP base_reg, NULL |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2249 // CastPP base_reg // NotNull |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2250 // Load [base_reg + offset], val_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2251 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2252 // after these transformations will be |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2253 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2254 // LoadN memory, narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2255 // CmpN narrow_oop_reg, NULL |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2256 // 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
|
2257 // Load [base_reg + offset], val_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2258 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2259 // 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
|
2260 // 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
|
2261 // final_graph_reshaping_walk()). |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2262 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2263 // 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
|
2264 // on x86: |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2265 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2266 // Load_narrow_oop memory, narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2267 // 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
|
2268 // NullCheck narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2269 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2270 // and on sparc: |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2271 // |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2272 // Load_narrow_oop memory, narrow_oop_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2273 // 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
|
2274 // Load [base_reg + offset], val_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2275 // NullCheck base_reg |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2276 // |
|
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2277 } else if (t->isa_oopptr()) { |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2278 new_in2 = ConNode::make(C, t->make_narrowoop()); |
|
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2279 } |
|
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2280 } |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2281 if (new_in2 != NULL) { |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2282 Node* cmpN = new (C, 3) CmpNNode(in1->in(1), new_in2); |
|
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
164
diff
changeset
|
2283 n->subsume_by( cmpN ); |
|
331
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2284 if (in1->outcnt() == 0) { |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2285 in1->disconnect_inputs(NULL); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2286 } |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2287 if (in2->outcnt() == 0) { |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2288 in2->disconnect_inputs(NULL); |
|
cecd8eb4e0ca
6706829: Compressed Oops: add debug info for narrow oops
kvn
parents:
293
diff
changeset
|
2289 } |
|
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2290 } |
|
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
163
diff
changeset
|
2291 } |
|
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
253
diff
changeset
|
2292 break; |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2293 |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2294 case Op_DecodeN: |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2295 assert(!n->in(1)->is_EncodeP(), "should be optimized out"); |
|
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2296 // 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
|
2297 // an address expression, see the code for Op_CastPP above. |
|
1575
3657cb01ffc5
6954029: Improve implicit null check generation with compressed oops
kvn
parents:
1397
diff
changeset
|
2298 assert(n->in(0) == NULL || !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
|
2299 break; |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2300 |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2301 case Op_EncodeP: { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2302 Node* in1 = n->in(1); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2303 if (in1->is_DecodeN()) { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2304 n->subsume_by(in1->in(1)); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2305 } else if (in1->Opcode() == Op_ConP) { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2306 Compile* C = Compile::current(); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2307 const Type* t = in1->bottom_type(); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2308 if (t == TypePtr::NULL_PTR) { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2309 n->subsume_by(ConNode::make(C, TypeNarrowOop::NULL_PTR)); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2310 } else if (t->isa_oopptr()) { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2311 n->subsume_by(ConNode::make(C, t->make_narrowoop())); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2312 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2313 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2314 if (in1->outcnt() == 0) { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2315 in1->disconnect_inputs(NULL); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2316 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2317 break; |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2318 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2319 |
|
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2320 case Op_Proj: { |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2321 if (OptimizeStringConcat) { |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2322 ProjNode* p = n->as_Proj(); |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2323 if (p->_is_io_use) { |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2324 // Separate projections were used for the exception path which |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2325 // 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
|
2326 // then they will hang around and should just be replaced with |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2327 // the original one. |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2328 Node* proj = NULL; |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2329 // Replace with just one |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2330 for (SimpleDUIterator i(p->in(0)); i.has_next(); i.next()) { |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2331 Node *use = i.get(); |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2332 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
|
2333 proj = use; |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2334 break; |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2335 } |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2336 } |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2337 assert(p != NULL, "must be found"); |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2338 p->subsume_by(proj); |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2339 } |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2340 } |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2341 break; |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2342 } |
|
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
929
diff
changeset
|
2343 |
|
368
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2344 case Op_Phi: |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2345 if (n->as_Phi()->bottom_type()->isa_narrowoop()) { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2346 // 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
|
2347 // 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
|
2348 Node* unique_in = n->in(1); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2349 assert(unique_in != NULL, ""); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2350 uint cnt = n->req(); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2351 for (uint i = 2; i < cnt; i++) { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2352 Node* m = n->in(i); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2353 assert(m != NULL, ""); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2354 if (unique_in != m) |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2355 unique_in = NULL; |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2356 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2357 if (unique_in != NULL) { |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2358 n->subsume_by(unique_in); |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
changeset
|
2359 } |
|
36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
kvn
parents:
367
diff
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|
2360 } |
|
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|
2361 break; |
|
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|
2362 |
|
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2363 #endif |
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2364 |
| 0 | 2365 case Op_ModI: |
| 2366 if (UseDivMod) { | |
| 2367 // Check if a%b and a/b both exist | |
| 2368 Node* d = n->find_similar(Op_DivI); | |
| 2369 if (d) { | |
| 2370 // Replace them with a fused divmod if supported | |
| 2371 Compile* C = Compile::current(); | |
| 2372 if (Matcher::has_match_rule(Op_DivModI)) { | |
| 2373 DivModINode* divmod = DivModINode::make(C, n); | |
|
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2374 d->subsume_by(divmod->div_proj()); |
|
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2375 n->subsume_by(divmod->mod_proj()); |
| 0 | 2376 } else { |
| 2377 // replace a%b with a-((a/b)*b) | |
| 2378 Node* mult = new (C, 3) MulINode(d, d->in(2)); | |
| 2379 Node* sub = new (C, 3) SubINode(d->in(1), mult); | |
|
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2380 n->subsume_by( sub ); |
| 0 | 2381 } |
| 2382 } | |
| 2383 } | |
| 2384 break; | |
| 2385 | |
| 2386 case Op_ModL: | |
| 2387 if (UseDivMod) { | |
| 2388 // Check if a%b and a/b both exist | |
| 2389 Node* d = n->find_similar(Op_DivL); | |
| 2390 if (d) { | |
| 2391 // Replace them with a fused divmod if supported | |
| 2392 Compile* C = Compile::current(); | |
| 2393 if (Matcher::has_match_rule(Op_DivModL)) { | |
| 2394 DivModLNode* divmod = DivModLNode::make(C, n); | |
|
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2395 d->subsume_by(divmod->div_proj()); |
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2396 n->subsume_by(divmod->mod_proj()); |
| 0 | 2397 } else { |
| 2398 // replace a%b with a-((a/b)*b) | |
| 2399 Node* mult = new (C, 3) MulLNode(d, d->in(2)); | |
| 2400 Node* sub = new (C, 3) SubLNode(d->in(1), mult); | |
|
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|
2401 n->subsume_by( sub ); |
| 0 | 2402 } |
| 2403 } | |
| 2404 } | |
| 2405 break; | |
| 2406 | |
| 2407 case Op_Load16B: | |
| 2408 case Op_Load8B: | |
| 2409 case Op_Load4B: | |
| 2410 case Op_Load8S: | |
| 2411 case Op_Load4S: | |
| 2412 case Op_Load2S: | |
| 2413 case Op_Load8C: | |
| 2414 case Op_Load4C: | |
| 2415 case Op_Load2C: | |
| 2416 case Op_Load4I: | |
| 2417 case Op_Load2I: | |
| 2418 case Op_Load2L: | |
| 2419 case Op_Load4F: | |
| 2420 case Op_Load2F: | |
| 2421 case Op_Load2D: | |
| 2422 case Op_Store16B: | |
| 2423 case Op_Store8B: | |
| 2424 case Op_Store4B: | |
| 2425 case Op_Store8C: | |
| 2426 case Op_Store4C: | |
| 2427 case Op_Store2C: | |
| 2428 case Op_Store4I: | |
| 2429 case Op_Store2I: | |
| 2430 case Op_Store2L: | |
| 2431 case Op_Store4F: | |
| 2432 case Op_Store2F: | |
| 2433 case Op_Store2D: | |
| 2434 break; | |
| 2435 | |
| 2436 case Op_PackB: | |
| 2437 case Op_PackS: | |
| 2438 case Op_PackC: | |
| 2439 case Op_PackI: | |
| 2440 case Op_PackF: | |
| 2441 case Op_PackL: | |
| 2442 case Op_PackD: | |
| 2443 if (n->req()-1 > 2) { | |
| 2444 // Replace many operand PackNodes with a binary tree for matching | |
| 2445 PackNode* p = (PackNode*) n; | |
| 2446 Node* btp = p->binaryTreePack(Compile::current(), 1, n->req()); | |
|
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2447 n->subsume_by(btp); |
| 0 | 2448 } |
| 2449 break; | |
|
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|
2450 case Op_Loop: |
|
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|
2451 case Op_CountedLoop: |
|
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|
2452 if (n->as_Loop()->is_inner_loop()) { |
|
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|
2453 frc.inc_inner_loop_count(); |
|
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|
2454 } |
|
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|
2455 break; |
| 0 | 2456 default: |
| 2457 assert( !n->is_Call(), "" ); | |
| 2458 assert( !n->is_Mem(), "" ); | |
| 2459 break; | |
| 2460 } | |
| 127 | 2461 |
| 2462 // Collect CFG split points | |
| 2463 if (n->is_MultiBranch()) | |
|
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|
2464 frc._tests.push(n); |
| 0 | 2465 } |
| 2466 | |
| 2467 //------------------------------final_graph_reshaping_walk--------------------- | |
| 2468 // Replacing Opaque nodes with their input in final_graph_reshaping_impl(), | |
| 2469 // requires that the walk visits a node's inputs before visiting the node. | |
|
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2470 static void final_graph_reshaping_walk( Node_Stack &nstack, Node *root, Final_Reshape_Counts &frc ) { |
|
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2471 ResourceArea *area = Thread::current()->resource_area(); |
|
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2472 Unique_Node_List sfpt(area); |
|
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2473 |
|
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|
2474 frc._visited.set(root->_idx); // first, mark node as visited |
| 0 | 2475 uint cnt = root->req(); |
| 2476 Node *n = root; | |
| 2477 uint i = 0; | |
| 2478 while (true) { | |
| 2479 if (i < cnt) { | |
| 2480 // Place all non-visited non-null inputs onto stack | |
| 2481 Node* m = n->in(i); | |
| 2482 ++i; | |
|
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2483 if (m != NULL && !frc._visited.test_set(m->_idx)) { |
|
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2484 if (m->is_SafePoint() && m->as_SafePoint()->jvms() != NULL) |
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|
2485 sfpt.push(m); |
| 0 | 2486 cnt = m->req(); |
| 2487 nstack.push(n, i); // put on stack parent and next input's index | |
| 2488 n = m; | |
| 2489 i = 0; | |
| 2490 } | |
| 2491 } else { | |
| 2492 // Now do post-visit work | |
|
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|
2493 final_graph_reshaping_impl( n, frc ); |
| 0 | 2494 if (nstack.is_empty()) |
| 2495 break; // finished | |
| 2496 n = nstack.node(); // Get node from stack | |
| 2497 cnt = n->req(); | |
| 2498 i = nstack.index(); | |
| 2499 nstack.pop(); // Shift to the next node on stack | |
| 2500 } | |
| 2501 } | |
|
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|
2502 |
|
1575
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|
2503 // Skip next transformation if compressed oops are not used. |
|
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|
2504 if (!UseCompressedOops || !Matcher::gen_narrow_oop_implicit_null_checks()) |
|
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|
2505 return; |
|
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|
2506 |
|
331
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|
2507 // Go over safepoints nodes to skip DecodeN nodes for debug edges. |
|
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2508 // It could be done for an uncommon traps or any safepoints/calls |
|
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2509 // if the DecodeN node is referenced only in a debug info. |
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2510 while (sfpt.size() > 0) { |
|
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|
2511 n = sfpt.pop(); |
|
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|
2512 JVMState *jvms = n->as_SafePoint()->jvms(); |
|
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2513 assert(jvms != NULL, "sanity"); |
|
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2514 int start = jvms->debug_start(); |
|
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2515 int end = n->req(); |
|
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|
2516 bool is_uncommon = (n->is_CallStaticJava() && |
|
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2517 n->as_CallStaticJava()->uncommon_trap_request() != 0); |
|
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2518 for (int j = start; j < end; j++) { |
|
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2519 Node* in = n->in(j); |
|
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2520 if (in->is_DecodeN()) { |
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|
2521 bool safe_to_skip = true; |
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2522 if (!is_uncommon ) { |
|
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|
2523 // Is it safe to skip? |
|
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2524 for (uint i = 0; i < in->outcnt(); i++) { |
|
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2525 Node* u = in->raw_out(i); |
|
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2526 if (!u->is_SafePoint() || |
|
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2527 u->is_Call() && u->as_Call()->has_non_debug_use(n)) { |
|
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|
2528 safe_to_skip = false; |
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|
2529 } |
|
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|
2530 } |
|
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|
2531 } |
|
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|
2532 if (safe_to_skip) { |
|
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|
2533 n->set_req(j, in->in(1)); |
|
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|
2534 } |
|
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|
2535 if (in->outcnt() == 0) { |
|
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|
2536 in->disconnect_inputs(NULL); |
|
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|
2537 } |
|
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|
2538 } |
|
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|
2539 } |
|
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|
2540 } |
| 0 | 2541 } |
| 2542 | |
| 2543 //------------------------------final_graph_reshaping-------------------------- | |
| 2544 // Final Graph Reshaping. | |
| 2545 // | |
| 2546 // (1) Clone simple inputs to uncommon calls, so they can be scheduled late | |
| 2547 // and not commoned up and forced early. Must come after regular | |
| 2548 // optimizations to avoid GVN undoing the cloning. Clone constant | |
| 2549 // inputs to Loop Phis; these will be split by the allocator anyways. | |
| 2550 // Remove Opaque nodes. | |
| 2551 // (2) Move last-uses by commutative operations to the left input to encourage | |
| 2552 // Intel update-in-place two-address operations and better register usage | |
| 2553 // on RISCs. Must come after regular optimizations to avoid GVN Ideal | |
| 2554 // calls canonicalizing them back. | |
| 2555 // (3) Count the number of double-precision FP ops, single-precision FP ops | |
| 2556 // and call sites. On Intel, we can get correct rounding either by | |
| 2557 // forcing singles to memory (requires extra stores and loads after each | |
| 2558 // FP bytecode) or we can set a rounding mode bit (requires setting and | |
| 2559 // clearing the mode bit around call sites). The mode bit is only used | |
| 2560 // if the relative frequency of single FP ops to calls is low enough. | |
| 2561 // This is a key transform for SPEC mpeg_audio. | |
| 2562 // (4) Detect infinite loops; blobs of code reachable from above but not | |
| 2563 // below. Several of the Code_Gen algorithms fail on such code shapes, | |
| 2564 // so we simply bail out. Happens a lot in ZKM.jar, but also happens | |
| 2565 // from time to time in other codes (such as -Xcomp finalizer loops, etc). | |
| 2566 // Detection is by looking for IfNodes where only 1 projection is | |
| 2567 // reachable from below or CatchNodes missing some targets. | |
| 2568 // (5) Assert for insane oop offsets in debug mode. | |
| 2569 | |
| 2570 bool Compile::final_graph_reshaping() { | |
| 2571 // an infinite loop may have been eliminated by the optimizer, | |
| 2572 // in which case the graph will be empty. | |
| 2573 if (root()->req() == 1) { | |
| 2574 record_method_not_compilable("trivial infinite loop"); | |
| 2575 return true; | |
| 2576 } | |
| 2577 | |
|
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|
2578 Final_Reshape_Counts frc; |
| 0 | 2579 |
| 2580 // Visit everybody reachable! | |
| 2581 // Allocate stack of size C->unique()/2 to avoid frequent realloc | |
| 2582 Node_Stack nstack(unique() >> 1); | |
|
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|
2583 final_graph_reshaping_walk(nstack, root(), frc); |
| 0 | 2584 |
| 2585 // Check for unreachable (from below) code (i.e., infinite loops). | |
|
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|
2586 for( uint i = 0; i < frc._tests.size(); i++ ) { |
|
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|
2587 MultiBranchNode *n = frc._tests[i]->as_MultiBranch(); |
| 127 | 2588 // Get number of CFG targets. |
| 0 | 2589 // Note that PCTables include exception targets after calls. |
| 127 | 2590 uint required_outcnt = n->required_outcnt(); |
| 2591 if (n->outcnt() != required_outcnt) { | |
| 0 | 2592 // Check for a few special cases. Rethrow Nodes never take the |
| 2593 // 'fall-thru' path, so expected kids is 1 less. | |
| 2594 if (n->is_PCTable() && n->in(0) && n->in(0)->in(0)) { | |
| 2595 if (n->in(0)->in(0)->is_Call()) { | |
| 2596 CallNode *call = n->in(0)->in(0)->as_Call(); | |
| 2597 if (call->entry_point() == OptoRuntime::rethrow_stub()) { | |
| 127 | 2598 required_outcnt--; // Rethrow always has 1 less kid |
| 0 | 2599 } else if (call->req() > TypeFunc::Parms && |
| 2600 call->is_CallDynamicJava()) { | |
| 2601 // Check for null receiver. In such case, the optimizer has | |
| 2602 // detected that the virtual call will always result in a null | |
| 2603 // pointer exception. The fall-through projection of this CatchNode | |
| 2604 // will not be populated. | |
| 2605 Node *arg0 = call->in(TypeFunc::Parms); | |
| 2606 if (arg0->is_Type() && | |
| 2607 arg0->as_Type()->type()->higher_equal(TypePtr::NULL_PTR)) { | |
| 127 | 2608 required_outcnt--; |
| 0 | 2609 } |
| 2610 } else if (call->entry_point() == OptoRuntime::new_array_Java() && | |
| 2611 call->req() > TypeFunc::Parms+1 && | |
| 2612 call->is_CallStaticJava()) { | |
| 2613 // Check for negative array length. In such case, the optimizer has | |
| 2614 // detected that the allocation attempt will always result in an | |
| 2615 // exception. There is no fall-through projection of this CatchNode . | |
| 2616 Node *arg1 = call->in(TypeFunc::Parms+1); | |
| 2617 if (arg1->is_Type() && | |
| 2618 arg1->as_Type()->type()->join(TypeInt::POS)->empty()) { | |
| 127 | 2619 required_outcnt--; |
| 0 | 2620 } |
| 2621 } | |
| 2622 } | |
| 2623 } | |
| 127 | 2624 // Recheck with a better notion of 'required_outcnt' |
| 2625 if (n->outcnt() != required_outcnt) { | |
| 0 | 2626 record_method_not_compilable("malformed control flow"); |
| 2627 return true; // Not all targets reachable! | |
| 2628 } | |
| 2629 } | |
| 2630 // Check that I actually visited all kids. Unreached kids | |
| 2631 // must be infinite loops. | |
| 2632 for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) | |
|
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|
2633 if (!frc._visited.test(n->fast_out(j)->_idx)) { |
| 0 | 2634 record_method_not_compilable("infinite loop"); |
| 2635 return true; // Found unvisited kid; must be unreach | |
| 2636 } | |
| 2637 } | |
| 2638 | |
| 2639 // If original bytecodes contained a mixture of floats and doubles | |
| 2640 // check if the optimizer has made it homogenous, item (3). | |
|
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2641 if( Use24BitFPMode && Use24BitFP && UseSSE == 0 && |
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2642 frc.get_float_count() > 32 && |
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2643 frc.get_double_count() == 0 && |
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2644 (10 * frc.get_call_count() < frc.get_float_count()) ) { |
| 0 | 2645 set_24_bit_selection_and_mode( false, true ); |
| 2646 } | |
| 2647 | |
|
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2648 set_java_calls(frc.get_java_call_count()); |
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2649 set_inner_loops(frc.get_inner_loop_count()); |
| 0 | 2650 |
| 2651 // No infinite loops, no reason to bail out. | |
| 2652 return false; | |
| 2653 } | |
| 2654 | |
| 2655 //-----------------------------too_many_traps---------------------------------- | |
| 2656 // Report if there are too many traps at the current method and bci. | |
| 2657 // Return true if there was a trap, and/or PerMethodTrapLimit is exceeded. | |
| 2658 bool Compile::too_many_traps(ciMethod* method, | |
| 2659 int bci, | |
| 2660 Deoptimization::DeoptReason reason) { | |
| 2661 ciMethodData* md = method->method_data(); | |
| 2662 if (md->is_empty()) { | |
| 2663 // Assume the trap has not occurred, or that it occurred only | |
| 2664 // because of a transient condition during start-up in the interpreter. | |
| 2665 return false; | |
| 2666 } | |
| 2667 if (md->has_trap_at(bci, reason) != 0) { | |
| 2668 // Assume PerBytecodeTrapLimit==0, for a more conservative heuristic. | |
| 2669 // Also, if there are multiple reasons, or if there is no per-BCI record, | |
| 2670 // assume the worst. | |
| 2671 if (log()) | |
| 2672 log()->elem("observe trap='%s' count='%d'", | |
| 2673 Deoptimization::trap_reason_name(reason), | |
| 2674 md->trap_count(reason)); | |
| 2675 return true; | |
| 2676 } else { | |
| 2677 // Ignore method/bci and see if there have been too many globally. | |
| 2678 return too_many_traps(reason, md); | |
| 2679 } | |
| 2680 } | |
| 2681 | |
| 2682 // Less-accurate variant which does not require a method and bci. | |
| 2683 bool Compile::too_many_traps(Deoptimization::DeoptReason reason, | |
| 2684 ciMethodData* logmd) { | |
| 2685 if (trap_count(reason) >= (uint)PerMethodTrapLimit) { | |
| 2686 // Too many traps globally. | |
| 2687 // Note that we use cumulative trap_count, not just md->trap_count. | |
| 2688 if (log()) { | |
| 2689 int mcount = (logmd == NULL)? -1: (int)logmd->trap_count(reason); | |
| 2690 log()->elem("observe trap='%s' count='0' mcount='%d' ccount='%d'", | |
| 2691 Deoptimization::trap_reason_name(reason), | |
| 2692 mcount, trap_count(reason)); | |
| 2693 } | |
| 2694 return true; | |
| 2695 } else { | |
| 2696 // The coast is clear. | |
| 2697 return false; | |
| 2698 } | |
| 2699 } | |
| 2700 | |
| 2701 //--------------------------too_many_recompiles-------------------------------- | |
| 2702 // Report if there are too many recompiles at the current method and bci. | |
| 2703 // Consults PerBytecodeRecompilationCutoff and PerMethodRecompilationCutoff. | |
| 2704 // Is not eager to return true, since this will cause the compiler to use | |
| 2705 // Action_none for a trap point, to avoid too many recompilations. | |
| 2706 bool Compile::too_many_recompiles(ciMethod* method, | |
| 2707 int bci, | |
| 2708 Deoptimization::DeoptReason reason) { | |
| 2709 ciMethodData* md = method->method_data(); | |
| 2710 if (md->is_empty()) { | |
| 2711 // Assume the trap has not occurred, or that it occurred only | |
| 2712 // because of a transient condition during start-up in the interpreter. | |
| 2713 return false; | |
| 2714 } | |
| 2715 // Pick a cutoff point well within PerBytecodeRecompilationCutoff. | |
| 2716 uint bc_cutoff = (uint) PerBytecodeRecompilationCutoff / 8; | |
| 2717 uint m_cutoff = (uint) PerMethodRecompilationCutoff / 2 + 1; // not zero | |
| 2718 Deoptimization::DeoptReason per_bc_reason | |
| 2719 = Deoptimization::reason_recorded_per_bytecode_if_any(reason); | |
| 2720 if ((per_bc_reason == Deoptimization::Reason_none | |
| 2721 || md->has_trap_at(bci, reason) != 0) | |
| 2722 // The trap frequency measure we care about is the recompile count: | |
| 2723 && md->trap_recompiled_at(bci) | |
| 2724 && md->overflow_recompile_count() >= bc_cutoff) { | |
| 2725 // Do not emit a trap here if it has already caused recompilations. | |
| 2726 // Also, if there are multiple reasons, or if there is no per-BCI record, | |
| 2727 // assume the worst. | |
| 2728 if (log()) | |
| 2729 log()->elem("observe trap='%s recompiled' count='%d' recompiles2='%d'", | |
| 2730 Deoptimization::trap_reason_name(reason), | |
| 2731 md->trap_count(reason), | |
| 2732 md->overflow_recompile_count()); | |
| 2733 return true; | |
| 2734 } else if (trap_count(reason) != 0 | |
| 2735 && decompile_count() >= m_cutoff) { | |
| 2736 // Too many recompiles globally, and we have seen this sort of trap. | |
| 2737 // Use cumulative decompile_count, not just md->decompile_count. | |
| 2738 if (log()) | |
| 2739 log()->elem("observe trap='%s' count='%d' mcount='%d' decompiles='%d' mdecompiles='%d'", | |
| 2740 Deoptimization::trap_reason_name(reason), | |
| 2741 md->trap_count(reason), trap_count(reason), | |
| 2742 md->decompile_count(), decompile_count()); | |
| 2743 return true; | |
| 2744 } else { | |
| 2745 // The coast is clear. | |
| 2746 return false; | |
| 2747 } | |
| 2748 } | |
| 2749 | |
| 2750 | |
| 2751 #ifndef PRODUCT | |
| 2752 //------------------------------verify_graph_edges--------------------------- | |
| 2753 // Walk the Graph and verify that there is a one-to-one correspondence | |
| 2754 // between Use-Def edges and Def-Use edges in the graph. | |
| 2755 void Compile::verify_graph_edges(bool no_dead_code) { | |
| 2756 if (VerifyGraphEdges) { | |
| 2757 ResourceArea *area = Thread::current()->resource_area(); | |
| 2758 Unique_Node_List visited(area); | |
| 2759 // Call recursive graph walk to check edges | |
| 2760 _root->verify_edges(visited); | |
| 2761 if (no_dead_code) { | |
| 2762 // Now make sure that no visited node is used by an unvisited node. | |
| 2763 bool dead_nodes = 0; | |
| 2764 Unique_Node_List checked(area); | |
| 2765 while (visited.size() > 0) { | |
| 2766 Node* n = visited.pop(); | |
| 2767 checked.push(n); | |
| 2768 for (uint i = 0; i < n->outcnt(); i++) { | |
| 2769 Node* use = n->raw_out(i); | |
| 2770 if (checked.member(use)) continue; // already checked | |
| 2771 if (visited.member(use)) continue; // already in the graph | |
| 2772 if (use->is_Con()) continue; // a dead ConNode is OK | |
| 2773 // At this point, we have found a dead node which is DU-reachable. | |
| 2774 if (dead_nodes++ == 0) | |
| 2775 tty->print_cr("*** Dead nodes reachable via DU edges:"); | |
| 2776 use->dump(2); | |
| 2777 tty->print_cr("---"); | |
| 2778 checked.push(use); // No repeats; pretend it is now checked. | |
| 2779 } | |
| 2780 } | |
| 2781 assert(dead_nodes == 0, "using nodes must be reachable from root"); | |
| 2782 } | |
| 2783 } | |
| 2784 } | |
| 2785 #endif | |
| 2786 | |
| 2787 // The Compile object keeps track of failure reasons separately from the ciEnv. | |
| 2788 // This is required because there is not quite a 1-1 relation between the | |
| 2789 // ciEnv and its compilation task and the Compile object. Note that one | |
| 2790 // ciEnv might use two Compile objects, if C2Compiler::compile_method decides | |
| 2791 // to backtrack and retry without subsuming loads. Other than this backtracking | |
| 2792 // behavior, the Compile's failure reason is quietly copied up to the ciEnv | |
| 2793 // by the logic in C2Compiler. | |
| 2794 void Compile::record_failure(const char* reason) { | |
| 2795 if (log() != NULL) { | |
| 2796 log()->elem("failure reason='%s' phase='compile'", reason); | |
| 2797 } | |
| 2798 if (_failure_reason == NULL) { | |
| 2799 // Record the first failure reason. | |
| 2800 _failure_reason = reason; | |
| 2801 } | |
| 222 | 2802 if (!C->failure_reason_is(C2Compiler::retry_no_subsuming_loads())) { |
| 2803 C->print_method(_failure_reason); | |
| 2804 } | |
| 0 | 2805 _root = NULL; // flush the graph, too |
| 2806 } | |
| 2807 | |
| 2808 Compile::TracePhase::TracePhase(const char* name, elapsedTimer* accumulator, bool dolog) | |
| 2809 : TraceTime(NULL, accumulator, false NOT_PRODUCT( || TimeCompiler ), false) | |
| 2810 { | |
| 2811 if (dolog) { | |
| 2812 C = Compile::current(); | |
| 2813 _log = C->log(); | |
| 2814 } else { | |
| 2815 C = NULL; | |
| 2816 _log = NULL; | |
| 2817 } | |
| 2818 if (_log != NULL) { | |
| 2819 _log->begin_head("phase name='%s' nodes='%d'", name, C->unique()); | |
| 2820 _log->stamp(); | |
| 2821 _log->end_head(); | |
| 2822 } | |
| 2823 } | |
| 2824 | |
| 2825 Compile::TracePhase::~TracePhase() { | |
| 2826 if (_log != NULL) { | |
| 2827 _log->done("phase nodes='%d'", C->unique()); | |
| 2828 } | |
| 2829 } |