Mercurial > hg > truffle
annotate src/share/vm/opto/parse2.cpp @ 1565:ab102d5d923e
6939207: refactor constant pool index processing
Summary: Factored cleanup of instruction decode which prepares for enhanced ldc semantics.
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sun, 23 May 2010 01:38:26 -0700 |
| parents | 6deeaebad47a |
| children | e9ff18c4ace7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright 1998-2010 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/_parse2.cpp.incl" | |
| 27 | |
| 28 extern int explicit_null_checks_inserted, | |
| 29 explicit_null_checks_elided; | |
| 30 | |
| 31 //---------------------------------array_load---------------------------------- | |
| 32 void Parse::array_load(BasicType elem_type) { | |
| 33 const Type* elem = Type::TOP; | |
| 34 Node* adr = array_addressing(elem_type, 0, &elem); | |
| 605 | 35 if (stopped()) return; // guaranteed null or range check |
| 0 | 36 _sp -= 2; // Pop array and index |
| 37 const TypeAryPtr* adr_type = TypeAryPtr::get_array_body_type(elem_type); | |
| 38 Node* ld = make_load(control(), adr, elem, elem_type, adr_type); | |
| 39 push(ld); | |
| 40 } | |
| 41 | |
| 42 | |
| 43 //--------------------------------array_store---------------------------------- | |
| 44 void Parse::array_store(BasicType elem_type) { | |
| 45 Node* adr = array_addressing(elem_type, 1); | |
| 605 | 46 if (stopped()) return; // guaranteed null or range check |
| 0 | 47 Node* val = pop(); |
| 48 _sp -= 2; // Pop array and index | |
| 49 const TypeAryPtr* adr_type = TypeAryPtr::get_array_body_type(elem_type); | |
| 50 store_to_memory(control(), adr, val, elem_type, adr_type); | |
| 51 } | |
| 52 | |
| 53 | |
| 54 //------------------------------array_addressing------------------------------- | |
| 55 // Pull array and index from the stack. Compute pointer-to-element. | |
| 56 Node* Parse::array_addressing(BasicType type, int vals, const Type* *result2) { | |
| 57 Node *idx = peek(0+vals); // Get from stack without popping | |
| 58 Node *ary = peek(1+vals); // in case of exception | |
| 59 | |
| 60 // Null check the array base, with correct stack contents | |
| 61 ary = do_null_check(ary, T_ARRAY); | |
| 62 // Compile-time detect of null-exception? | |
| 63 if (stopped()) return top(); | |
| 64 | |
| 65 const TypeAryPtr* arytype = _gvn.type(ary)->is_aryptr(); | |
| 66 const TypeInt* sizetype = arytype->size(); | |
| 67 const Type* elemtype = arytype->elem(); | |
| 68 | |
| 69 if (UseUniqueSubclasses && result2 != NULL) { | |
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70 const Type* el = elemtype->make_ptr(); |
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71 if (el && el->isa_instptr()) { |
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72 const TypeInstPtr* toop = el->is_instptr(); |
| 0 | 73 if (toop->klass()->as_instance_klass()->unique_concrete_subklass()) { |
| 74 // If we load from "AbstractClass[]" we must see "ConcreteSubClass". | |
| 75 const Type* subklass = Type::get_const_type(toop->klass()); | |
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76 elemtype = subklass->join(el); |
| 0 | 77 } |
| 78 } | |
| 79 } | |
| 80 | |
| 81 // Check for big class initializers with all constant offsets | |
| 82 // feeding into a known-size array. | |
| 83 const TypeInt* idxtype = _gvn.type(idx)->is_int(); | |
| 84 // See if the highest idx value is less than the lowest array bound, | |
| 85 // and if the idx value cannot be negative: | |
| 86 bool need_range_check = true; | |
| 87 if (idxtype->_hi < sizetype->_lo && idxtype->_lo >= 0) { | |
| 88 need_range_check = false; | |
| 89 if (C->log() != NULL) C->log()->elem("observe that='!need_range_check'"); | |
| 90 } | |
| 91 | |
| 92 if (!arytype->klass()->is_loaded()) { | |
| 93 // Only fails for some -Xcomp runs | |
| 94 // The class is unloaded. We have to run this bytecode in the interpreter. | |
| 95 uncommon_trap(Deoptimization::Reason_unloaded, | |
| 96 Deoptimization::Action_reinterpret, | |
| 97 arytype->klass(), "!loaded array"); | |
| 98 return top(); | |
| 99 } | |
| 100 | |
| 101 // Do the range check | |
| 102 if (GenerateRangeChecks && need_range_check) { | |
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103 Node* tst; |
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104 if (sizetype->_hi <= 0) { |
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105 // The greatest array bound is negative, so we can conclude that we're |
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106 // compiling unreachable code, but the unsigned compare trick used below |
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107 // only works with non-negative lengths. Instead, hack "tst" to be zero so |
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108 // the uncommon_trap path will always be taken. |
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109 tst = _gvn.intcon(0); |
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110 } else { |
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111 // Range is constant in array-oop, so we can use the original state of mem |
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112 Node* len = load_array_length(ary); |
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113 |
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114 // Test length vs index (standard trick using unsigned compare) |
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115 Node* chk = _gvn.transform( new (C, 3) CmpUNode(idx, len) ); |
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116 BoolTest::mask btest = BoolTest::lt; |
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117 tst = _gvn.transform( new (C, 2) BoolNode(chk, btest) ); |
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118 } |
| 0 | 119 // Branch to failure if out of bounds |
| 120 { BuildCutout unless(this, tst, PROB_MAX); | |
| 121 if (C->allow_range_check_smearing()) { | |
| 122 // Do not use builtin_throw, since range checks are sometimes | |
| 123 // made more stringent by an optimistic transformation. | |
| 124 // This creates "tentative" range checks at this point, | |
| 125 // which are not guaranteed to throw exceptions. | |
| 126 // See IfNode::Ideal, is_range_check, adjust_check. | |
| 127 uncommon_trap(Deoptimization::Reason_range_check, | |
| 128 Deoptimization::Action_make_not_entrant, | |
| 129 NULL, "range_check"); | |
| 130 } else { | |
| 131 // If we have already recompiled with the range-check-widening | |
| 132 // heroic optimization turned off, then we must really be throwing | |
| 133 // range check exceptions. | |
| 134 builtin_throw(Deoptimization::Reason_range_check, idx); | |
| 135 } | |
| 136 } | |
| 137 } | |
| 138 // Check for always knowing you are throwing a range-check exception | |
| 139 if (stopped()) return top(); | |
| 140 | |
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141 Node* ptr = array_element_address(ary, idx, type, sizetype); |
| 0 | 142 |
| 143 if (result2 != NULL) *result2 = elemtype; | |
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144 |
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145 assert(ptr != top(), "top should go hand-in-hand with stopped"); |
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146 |
| 0 | 147 return ptr; |
| 148 } | |
| 149 | |
| 150 | |
| 151 // returns IfNode | |
| 152 IfNode* Parse::jump_if_fork_int(Node* a, Node* b, BoolTest::mask mask) { | |
| 153 Node *cmp = _gvn.transform( new (C, 3) CmpINode( a, b)); // two cases: shiftcount > 32 and shiftcount <= 32 | |
| 154 Node *tst = _gvn.transform( new (C, 2) BoolNode( cmp, mask)); | |
| 155 IfNode *iff = create_and_map_if( control(), tst, ((mask == BoolTest::eq) ? PROB_STATIC_INFREQUENT : PROB_FAIR), COUNT_UNKNOWN ); | |
| 156 return iff; | |
| 157 } | |
| 158 | |
| 159 // return Region node | |
| 160 Node* Parse::jump_if_join(Node* iffalse, Node* iftrue) { | |
| 161 Node *region = new (C, 3) RegionNode(3); // 2 results | |
| 162 record_for_igvn(region); | |
| 163 region->init_req(1, iffalse); | |
| 164 region->init_req(2, iftrue ); | |
| 165 _gvn.set_type(region, Type::CONTROL); | |
| 166 region = _gvn.transform(region); | |
| 167 set_control (region); | |
| 168 return region; | |
| 169 } | |
| 170 | |
| 171 | |
| 172 //------------------------------helper for tableswitch------------------------- | |
| 173 void Parse::jump_if_true_fork(IfNode *iff, int dest_bci_if_true, int prof_table_index) { | |
| 174 // True branch, use existing map info | |
| 175 { PreserveJVMState pjvms(this); | |
| 176 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode (iff) ); | |
| 177 set_control( iftrue ); | |
| 178 profile_switch_case(prof_table_index); | |
| 179 merge_new_path(dest_bci_if_true); | |
| 180 } | |
| 181 | |
| 182 // False branch | |
| 183 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(iff) ); | |
| 184 set_control( iffalse ); | |
| 185 } | |
| 186 | |
| 187 void Parse::jump_if_false_fork(IfNode *iff, int dest_bci_if_true, int prof_table_index) { | |
| 188 // True branch, use existing map info | |
| 189 { PreserveJVMState pjvms(this); | |
| 190 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode (iff) ); | |
| 191 set_control( iffalse ); | |
| 192 profile_switch_case(prof_table_index); | |
| 193 merge_new_path(dest_bci_if_true); | |
| 194 } | |
| 195 | |
| 196 // False branch | |
| 197 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(iff) ); | |
| 198 set_control( iftrue ); | |
| 199 } | |
| 200 | |
| 201 void Parse::jump_if_always_fork(int dest_bci, int prof_table_index) { | |
| 202 // False branch, use existing map and control() | |
| 203 profile_switch_case(prof_table_index); | |
| 204 merge_new_path(dest_bci); | |
| 205 } | |
| 206 | |
| 207 | |
| 208 extern "C" { | |
| 209 static int jint_cmp(const void *i, const void *j) { | |
| 210 int a = *(jint *)i; | |
| 211 int b = *(jint *)j; | |
| 212 return a > b ? 1 : a < b ? -1 : 0; | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 | |
| 217 // Default value for methodData switch indexing. Must be a negative value to avoid | |
| 218 // conflict with any legal switch index. | |
| 219 #define NullTableIndex -1 | |
| 220 | |
| 221 class SwitchRange : public StackObj { | |
| 222 // a range of integers coupled with a bci destination | |
| 223 jint _lo; // inclusive lower limit | |
| 224 jint _hi; // inclusive upper limit | |
| 225 int _dest; | |
| 226 int _table_index; // index into method data table | |
| 227 | |
| 228 public: | |
| 229 jint lo() const { return _lo; } | |
| 230 jint hi() const { return _hi; } | |
| 231 int dest() const { return _dest; } | |
| 232 int table_index() const { return _table_index; } | |
| 233 bool is_singleton() const { return _lo == _hi; } | |
| 234 | |
| 235 void setRange(jint lo, jint hi, int dest, int table_index) { | |
| 236 assert(lo <= hi, "must be a non-empty range"); | |
| 237 _lo = lo, _hi = hi; _dest = dest; _table_index = table_index; | |
| 238 } | |
| 239 bool adjoinRange(jint lo, jint hi, int dest, int table_index) { | |
| 240 assert(lo <= hi, "must be a non-empty range"); | |
| 241 if (lo == _hi+1 && dest == _dest && table_index == _table_index) { | |
| 242 _hi = hi; | |
| 243 return true; | |
| 244 } | |
| 245 return false; | |
| 246 } | |
| 247 | |
| 248 void set (jint value, int dest, int table_index) { | |
| 249 setRange(value, value, dest, table_index); | |
| 250 } | |
| 251 bool adjoin(jint value, int dest, int table_index) { | |
| 252 return adjoinRange(value, value, dest, table_index); | |
| 253 } | |
| 254 | |
| 255 void print(ciEnv* env) { | |
| 256 if (is_singleton()) | |
| 257 tty->print(" {%d}=>%d", lo(), dest()); | |
| 258 else if (lo() == min_jint) | |
| 259 tty->print(" {..%d}=>%d", hi(), dest()); | |
| 260 else if (hi() == max_jint) | |
| 261 tty->print(" {%d..}=>%d", lo(), dest()); | |
| 262 else | |
| 263 tty->print(" {%d..%d}=>%d", lo(), hi(), dest()); | |
| 264 } | |
| 265 }; | |
| 266 | |
| 267 | |
| 268 //-------------------------------do_tableswitch-------------------------------- | |
| 269 void Parse::do_tableswitch() { | |
| 270 Node* lookup = pop(); | |
| 271 | |
| 272 // Get information about tableswitch | |
| 273 int default_dest = iter().get_dest_table(0); | |
| 274 int lo_index = iter().get_int_table(1); | |
| 275 int hi_index = iter().get_int_table(2); | |
| 276 int len = hi_index - lo_index + 1; | |
| 277 | |
| 278 if (len < 1) { | |
| 279 // If this is a backward branch, add safepoint | |
| 280 maybe_add_safepoint(default_dest); | |
| 1172 | 281 if (should_add_predicate(default_dest)){ |
| 282 _sp += 1; // set original stack for use by uncommon_trap | |
| 283 add_predicate(); | |
| 284 _sp -= 1; | |
| 285 } | |
| 0 | 286 merge(default_dest); |
| 287 return; | |
| 288 } | |
| 289 | |
| 290 // generate decision tree, using trichotomy when possible | |
| 291 int rnum = len+2; | |
| 292 bool makes_backward_branch = false; | |
| 293 SwitchRange* ranges = NEW_RESOURCE_ARRAY(SwitchRange, rnum); | |
| 294 int rp = -1; | |
| 295 if (lo_index != min_jint) { | |
| 296 ranges[++rp].setRange(min_jint, lo_index-1, default_dest, NullTableIndex); | |
| 297 } | |
| 298 for (int j = 0; j < len; j++) { | |
| 299 jint match_int = lo_index+j; | |
| 300 int dest = iter().get_dest_table(j+3); | |
| 301 makes_backward_branch |= (dest <= bci()); | |
| 302 int table_index = method_data_update() ? j : NullTableIndex; | |
| 303 if (rp < 0 || !ranges[rp].adjoin(match_int, dest, table_index)) { | |
| 304 ranges[++rp].set(match_int, dest, table_index); | |
| 305 } | |
| 306 } | |
| 307 jint highest = lo_index+(len-1); | |
| 308 assert(ranges[rp].hi() == highest, ""); | |
| 309 if (highest != max_jint | |
| 310 && !ranges[rp].adjoinRange(highest+1, max_jint, default_dest, NullTableIndex)) { | |
| 311 ranges[++rp].setRange(highest+1, max_jint, default_dest, NullTableIndex); | |
| 312 } | |
| 313 assert(rp < len+2, "not too many ranges"); | |
| 314 | |
| 315 // Safepoint in case if backward branch observed | |
| 316 if( makes_backward_branch && UseLoopSafepoints ) | |
| 317 add_safepoint(); | |
| 318 | |
| 319 jump_switch_ranges(lookup, &ranges[0], &ranges[rp]); | |
| 320 } | |
| 321 | |
| 322 | |
| 323 //------------------------------do_lookupswitch-------------------------------- | |
| 324 void Parse::do_lookupswitch() { | |
| 325 Node *lookup = pop(); // lookup value | |
| 326 // Get information about lookupswitch | |
| 327 int default_dest = iter().get_dest_table(0); | |
| 328 int len = iter().get_int_table(1); | |
| 329 | |
| 330 if (len < 1) { // If this is a backward branch, add safepoint | |
| 331 maybe_add_safepoint(default_dest); | |
| 1172 | 332 if (should_add_predicate(default_dest)){ |
| 333 _sp += 1; // set original stack for use by uncommon_trap | |
| 334 add_predicate(); | |
| 335 _sp -= 1; | |
| 336 } | |
| 0 | 337 merge(default_dest); |
| 338 return; | |
| 339 } | |
| 340 | |
| 341 // generate decision tree, using trichotomy when possible | |
| 342 jint* table = NEW_RESOURCE_ARRAY(jint, len*2); | |
| 343 { | |
| 344 for( int j = 0; j < len; j++ ) { | |
| 345 table[j+j+0] = iter().get_int_table(2+j+j); | |
| 346 table[j+j+1] = iter().get_dest_table(2+j+j+1); | |
| 347 } | |
| 348 qsort( table, len, 2*sizeof(table[0]), jint_cmp ); | |
| 349 } | |
| 350 | |
| 351 int rnum = len*2+1; | |
| 352 bool makes_backward_branch = false; | |
| 353 SwitchRange* ranges = NEW_RESOURCE_ARRAY(SwitchRange, rnum); | |
| 354 int rp = -1; | |
| 355 for( int j = 0; j < len; j++ ) { | |
| 356 jint match_int = table[j+j+0]; | |
| 357 int dest = table[j+j+1]; | |
| 358 int next_lo = rp < 0 ? min_jint : ranges[rp].hi()+1; | |
| 359 int table_index = method_data_update() ? j : NullTableIndex; | |
| 360 makes_backward_branch |= (dest <= bci()); | |
| 361 if( match_int != next_lo ) { | |
| 362 ranges[++rp].setRange(next_lo, match_int-1, default_dest, NullTableIndex); | |
| 363 } | |
| 364 if( rp < 0 || !ranges[rp].adjoin(match_int, dest, table_index) ) { | |
| 365 ranges[++rp].set(match_int, dest, table_index); | |
| 366 } | |
| 367 } | |
| 368 jint highest = table[2*(len-1)]; | |
| 369 assert(ranges[rp].hi() == highest, ""); | |
| 370 if( highest != max_jint | |
| 371 && !ranges[rp].adjoinRange(highest+1, max_jint, default_dest, NullTableIndex) ) { | |
| 372 ranges[++rp].setRange(highest+1, max_jint, default_dest, NullTableIndex); | |
| 373 } | |
| 374 assert(rp < rnum, "not too many ranges"); | |
| 375 | |
| 376 // Safepoint in case backward branch observed | |
| 377 if( makes_backward_branch && UseLoopSafepoints ) | |
| 378 add_safepoint(); | |
| 379 | |
| 380 jump_switch_ranges(lookup, &ranges[0], &ranges[rp]); | |
| 381 } | |
| 382 | |
| 383 //----------------------------create_jump_tables------------------------------- | |
| 384 bool Parse::create_jump_tables(Node* key_val, SwitchRange* lo, SwitchRange* hi) { | |
| 385 // Are jumptables enabled | |
| 386 if (!UseJumpTables) return false; | |
| 387 | |
| 388 // Are jumptables supported | |
| 389 if (!Matcher::has_match_rule(Op_Jump)) return false; | |
| 390 | |
| 391 // Don't make jump table if profiling | |
| 392 if (method_data_update()) return false; | |
| 393 | |
| 394 // Decide if a guard is needed to lop off big ranges at either (or | |
| 395 // both) end(s) of the input set. We'll call this the default target | |
| 396 // even though we can't be sure that it is the true "default". | |
| 397 | |
| 398 bool needs_guard = false; | |
| 399 int default_dest; | |
| 400 int64 total_outlier_size = 0; | |
| 401 int64 hi_size = ((int64)hi->hi()) - ((int64)hi->lo()) + 1; | |
| 402 int64 lo_size = ((int64)lo->hi()) - ((int64)lo->lo()) + 1; | |
| 403 | |
| 404 if (lo->dest() == hi->dest()) { | |
| 405 total_outlier_size = hi_size + lo_size; | |
| 406 default_dest = lo->dest(); | |
| 407 } else if (lo_size > hi_size) { | |
| 408 total_outlier_size = lo_size; | |
| 409 default_dest = lo->dest(); | |
| 410 } else { | |
| 411 total_outlier_size = hi_size; | |
| 412 default_dest = hi->dest(); | |
| 413 } | |
| 414 | |
| 415 // If a guard test will eliminate very sparse end ranges, then | |
| 416 // it is worth the cost of an extra jump. | |
| 417 if (total_outlier_size > (MaxJumpTableSparseness * 4)) { | |
| 418 needs_guard = true; | |
| 419 if (default_dest == lo->dest()) lo++; | |
| 420 if (default_dest == hi->dest()) hi--; | |
| 421 } | |
| 422 | |
| 423 // Find the total number of cases and ranges | |
| 424 int64 num_cases = ((int64)hi->hi()) - ((int64)lo->lo()) + 1; | |
| 425 int num_range = hi - lo + 1; | |
| 426 | |
| 427 // Don't create table if: too large, too small, or too sparse. | |
| 428 if (num_cases < MinJumpTableSize || num_cases > MaxJumpTableSize) | |
| 429 return false; | |
| 430 if (num_cases > (MaxJumpTableSparseness * num_range)) | |
| 431 return false; | |
| 432 | |
| 433 // Normalize table lookups to zero | |
| 434 int lowval = lo->lo(); | |
| 435 key_val = _gvn.transform( new (C, 3) SubINode(key_val, _gvn.intcon(lowval)) ); | |
| 436 | |
| 437 // Generate a guard to protect against input keyvals that aren't | |
| 438 // in the switch domain. | |
| 439 if (needs_guard) { | |
| 440 Node* size = _gvn.intcon(num_cases); | |
| 441 Node* cmp = _gvn.transform( new (C, 3) CmpUNode(key_val, size) ); | |
| 442 Node* tst = _gvn.transform( new (C, 2) BoolNode(cmp, BoolTest::ge) ); | |
| 443 IfNode* iff = create_and_map_if( control(), tst, PROB_FAIR, COUNT_UNKNOWN); | |
| 444 jump_if_true_fork(iff, default_dest, NullTableIndex); | |
| 445 } | |
| 446 | |
| 447 // Create an ideal node JumpTable that has projections | |
| 448 // of all possible ranges for a switch statement | |
| 449 // The key_val input must be converted to a pointer offset and scaled. | |
| 450 // Compare Parse::array_addressing above. | |
| 451 #ifdef _LP64 | |
| 452 // Clean the 32-bit int into a real 64-bit offset. | |
| 453 // Otherwise, the jint value 0 might turn into an offset of 0x0800000000. | |
| 454 const TypeLong* lkeytype = TypeLong::make(CONST64(0), num_cases-1, Type::WidenMin); | |
| 455 key_val = _gvn.transform( new (C, 2) ConvI2LNode(key_val, lkeytype) ); | |
| 456 #endif | |
| 457 // Shift the value by wordsize so we have an index into the table, rather | |
| 458 // than a switch value | |
| 459 Node *shiftWord = _gvn.MakeConX(wordSize); | |
| 460 key_val = _gvn.transform( new (C, 3) MulXNode( key_val, shiftWord)); | |
| 461 | |
| 462 // Create the JumpNode | |
| 463 Node* jtn = _gvn.transform( new (C, 2) JumpNode(control(), key_val, num_cases) ); | |
| 464 | |
| 465 // These are the switch destinations hanging off the jumpnode | |
| 466 int i = 0; | |
| 467 for (SwitchRange* r = lo; r <= hi; r++) { | |
| 468 for (int j = r->lo(); j <= r->hi(); j++, i++) { | |
| 469 Node* input = _gvn.transform(new (C, 1) JumpProjNode(jtn, i, r->dest(), j - lowval)); | |
| 470 { | |
| 471 PreserveJVMState pjvms(this); | |
| 472 set_control(input); | |
| 473 jump_if_always_fork(r->dest(), r->table_index()); | |
| 474 } | |
| 475 } | |
| 476 } | |
| 477 assert(i == num_cases, "miscount of cases"); | |
| 478 stop_and_kill_map(); // no more uses for this JVMS | |
| 479 return true; | |
| 480 } | |
| 481 | |
| 482 //----------------------------jump_switch_ranges------------------------------- | |
| 483 void Parse::jump_switch_ranges(Node* key_val, SwitchRange *lo, SwitchRange *hi, int switch_depth) { | |
| 484 Block* switch_block = block(); | |
| 485 | |
| 486 if (switch_depth == 0) { | |
| 487 // Do special processing for the top-level call. | |
| 488 assert(lo->lo() == min_jint, "initial range must exhaust Type::INT"); | |
| 489 assert(hi->hi() == max_jint, "initial range must exhaust Type::INT"); | |
| 490 | |
| 491 // Decrement pred-numbers for the unique set of nodes. | |
| 492 #ifdef ASSERT | |
| 493 // Ensure that the block's successors are a (duplicate-free) set. | |
| 494 int successors_counted = 0; // block occurrences in [hi..lo] | |
| 495 int unique_successors = switch_block->num_successors(); | |
| 496 for (int i = 0; i < unique_successors; i++) { | |
| 497 Block* target = switch_block->successor_at(i); | |
| 498 | |
| 499 // Check that the set of successors is the same in both places. | |
| 500 int successors_found = 0; | |
| 501 for (SwitchRange* p = lo; p <= hi; p++) { | |
| 502 if (p->dest() == target->start()) successors_found++; | |
| 503 } | |
| 504 assert(successors_found > 0, "successor must be known"); | |
| 505 successors_counted += successors_found; | |
| 506 } | |
| 507 assert(successors_counted == (hi-lo)+1, "no unexpected successors"); | |
| 508 #endif | |
| 509 | |
| 510 // Maybe prune the inputs, based on the type of key_val. | |
| 511 jint min_val = min_jint; | |
| 512 jint max_val = max_jint; | |
| 513 const TypeInt* ti = key_val->bottom_type()->isa_int(); | |
| 514 if (ti != NULL) { | |
| 515 min_val = ti->_lo; | |
| 516 max_val = ti->_hi; | |
| 517 assert(min_val <= max_val, "invalid int type"); | |
| 518 } | |
| 519 while (lo->hi() < min_val) lo++; | |
| 520 if (lo->lo() < min_val) lo->setRange(min_val, lo->hi(), lo->dest(), lo->table_index()); | |
| 521 while (hi->lo() > max_val) hi--; | |
| 522 if (hi->hi() > max_val) hi->setRange(hi->lo(), max_val, hi->dest(), hi->table_index()); | |
| 523 } | |
| 524 | |
| 525 #ifndef PRODUCT | |
| 526 if (switch_depth == 0) { | |
| 527 _max_switch_depth = 0; | |
| 528 _est_switch_depth = log2_intptr((hi-lo+1)-1)+1; | |
| 529 } | |
| 530 #endif | |
| 531 | |
| 532 assert(lo <= hi, "must be a non-empty set of ranges"); | |
| 533 if (lo == hi) { | |
| 534 jump_if_always_fork(lo->dest(), lo->table_index()); | |
| 535 } else { | |
| 536 assert(lo->hi() == (lo+1)->lo()-1, "contiguous ranges"); | |
| 537 assert(hi->lo() == (hi-1)->hi()+1, "contiguous ranges"); | |
| 538 | |
| 539 if (create_jump_tables(key_val, lo, hi)) return; | |
| 540 | |
| 541 int nr = hi - lo + 1; | |
| 542 | |
| 543 SwitchRange* mid = lo + nr/2; | |
| 544 // if there is an easy choice, pivot at a singleton: | |
| 545 if (nr > 3 && !mid->is_singleton() && (mid-1)->is_singleton()) mid--; | |
| 546 | |
| 547 assert(lo < mid && mid <= hi, "good pivot choice"); | |
| 548 assert(nr != 2 || mid == hi, "should pick higher of 2"); | |
| 549 assert(nr != 3 || mid == hi-1, "should pick middle of 3"); | |
| 550 | |
| 551 Node *test_val = _gvn.intcon(mid->lo()); | |
| 552 | |
| 553 if (mid->is_singleton()) { | |
| 554 IfNode *iff_ne = jump_if_fork_int(key_val, test_val, BoolTest::ne); | |
| 555 jump_if_false_fork(iff_ne, mid->dest(), mid->table_index()); | |
| 556 | |
| 557 // Special Case: If there are exactly three ranges, and the high | |
| 558 // and low range each go to the same place, omit the "gt" test, | |
| 559 // since it will not discriminate anything. | |
| 560 bool eq_test_only = (hi == lo+2 && hi->dest() == lo->dest()); | |
| 561 if (eq_test_only) { | |
| 562 assert(mid == hi-1, ""); | |
| 563 } | |
| 564 | |
| 565 // if there is a higher range, test for it and process it: | |
| 566 if (mid < hi && !eq_test_only) { | |
| 567 // two comparisons of same values--should enable 1 test for 2 branches | |
| 568 // Use BoolTest::le instead of BoolTest::gt | |
| 569 IfNode *iff_le = jump_if_fork_int(key_val, test_val, BoolTest::le); | |
| 570 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(iff_le) ); | |
| 571 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(iff_le) ); | |
| 572 { PreserveJVMState pjvms(this); | |
| 573 set_control(iffalse); | |
| 574 jump_switch_ranges(key_val, mid+1, hi, switch_depth+1); | |
| 575 } | |
| 576 set_control(iftrue); | |
| 577 } | |
| 578 | |
| 579 } else { | |
| 580 // mid is a range, not a singleton, so treat mid..hi as a unit | |
| 581 IfNode *iff_ge = jump_if_fork_int(key_val, test_val, BoolTest::ge); | |
| 582 | |
| 583 // if there is a higher range, test for it and process it: | |
| 584 if (mid == hi) { | |
| 585 jump_if_true_fork(iff_ge, mid->dest(), mid->table_index()); | |
| 586 } else { | |
| 587 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(iff_ge) ); | |
| 588 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(iff_ge) ); | |
| 589 { PreserveJVMState pjvms(this); | |
| 590 set_control(iftrue); | |
| 591 jump_switch_ranges(key_val, mid, hi, switch_depth+1); | |
| 592 } | |
| 593 set_control(iffalse); | |
| 594 } | |
| 595 } | |
| 596 | |
| 597 // in any case, process the lower range | |
| 598 jump_switch_ranges(key_val, lo, mid-1, switch_depth+1); | |
| 599 } | |
| 600 | |
| 601 // Decrease pred_count for each successor after all is done. | |
| 602 if (switch_depth == 0) { | |
| 603 int unique_successors = switch_block->num_successors(); | |
| 604 for (int i = 0; i < unique_successors; i++) { | |
| 605 Block* target = switch_block->successor_at(i); | |
| 606 // Throw away the pre-allocated path for each unique successor. | |
| 607 target->next_path_num(); | |
| 608 } | |
| 609 } | |
| 610 | |
| 611 #ifndef PRODUCT | |
| 612 _max_switch_depth = MAX2(switch_depth, _max_switch_depth); | |
| 613 if (TraceOptoParse && Verbose && WizardMode && switch_depth == 0) { | |
| 614 SwitchRange* r; | |
| 615 int nsing = 0; | |
| 616 for( r = lo; r <= hi; r++ ) { | |
| 617 if( r->is_singleton() ) nsing++; | |
| 618 } | |
| 619 tty->print(">>> "); | |
| 620 _method->print_short_name(); | |
| 621 tty->print_cr(" switch decision tree"); | |
| 622 tty->print_cr(" %d ranges (%d singletons), max_depth=%d, est_depth=%d", | |
| 623 hi-lo+1, nsing, _max_switch_depth, _est_switch_depth); | |
| 624 if (_max_switch_depth > _est_switch_depth) { | |
| 625 tty->print_cr("******** BAD SWITCH DEPTH ********"); | |
| 626 } | |
| 627 tty->print(" "); | |
| 628 for( r = lo; r <= hi; r++ ) { | |
| 629 r->print(env()); | |
| 630 } | |
| 631 tty->print_cr(""); | |
| 632 } | |
| 633 #endif | |
| 634 } | |
| 635 | |
| 636 void Parse::modf() { | |
| 637 Node *f2 = pop(); | |
| 638 Node *f1 = pop(); | |
| 639 Node* c = make_runtime_call(RC_LEAF, OptoRuntime::modf_Type(), | |
| 640 CAST_FROM_FN_PTR(address, SharedRuntime::frem), | |
| 641 "frem", NULL, //no memory effects | |
| 642 f1, f2); | |
| 643 Node* res = _gvn.transform(new (C, 1) ProjNode(c, TypeFunc::Parms + 0)); | |
| 644 | |
| 645 push(res); | |
| 646 } | |
| 647 | |
| 648 void Parse::modd() { | |
| 649 Node *d2 = pop_pair(); | |
| 650 Node *d1 = pop_pair(); | |
| 651 Node* c = make_runtime_call(RC_LEAF, OptoRuntime::Math_DD_D_Type(), | |
| 652 CAST_FROM_FN_PTR(address, SharedRuntime::drem), | |
| 653 "drem", NULL, //no memory effects | |
| 654 d1, top(), d2, top()); | |
| 655 Node* res_d = _gvn.transform(new (C, 1) ProjNode(c, TypeFunc::Parms + 0)); | |
| 656 | |
| 657 #ifdef ASSERT | |
| 658 Node* res_top = _gvn.transform(new (C, 1) ProjNode(c, TypeFunc::Parms + 1)); | |
| 659 assert(res_top == top(), "second value must be top"); | |
| 660 #endif | |
| 661 | |
| 662 push_pair(res_d); | |
| 663 } | |
| 664 | |
| 665 void Parse::l2f() { | |
| 666 Node* f2 = pop(); | |
| 667 Node* f1 = pop(); | |
| 668 Node* c = make_runtime_call(RC_LEAF, OptoRuntime::l2f_Type(), | |
| 669 CAST_FROM_FN_PTR(address, SharedRuntime::l2f), | |
| 670 "l2f", NULL, //no memory effects | |
| 671 f1, f2); | |
| 672 Node* res = _gvn.transform(new (C, 1) ProjNode(c, TypeFunc::Parms + 0)); | |
| 673 | |
| 674 push(res); | |
| 675 } | |
| 676 | |
| 677 void Parse::do_irem() { | |
| 678 // Must keep both values on the expression-stack during null-check | |
| 679 do_null_check(peek(), T_INT); | |
| 680 // Compile-time detect of null-exception? | |
| 681 if (stopped()) return; | |
| 682 | |
| 683 Node* b = pop(); | |
| 684 Node* a = pop(); | |
| 685 | |
| 686 const Type *t = _gvn.type(b); | |
| 687 if (t != Type::TOP) { | |
| 688 const TypeInt *ti = t->is_int(); | |
| 689 if (ti->is_con()) { | |
| 690 int divisor = ti->get_con(); | |
| 691 // check for positive power of 2 | |
| 692 if (divisor > 0 && | |
| 693 (divisor & ~(divisor-1)) == divisor) { | |
| 694 // yes ! | |
| 695 Node *mask = _gvn.intcon((divisor - 1)); | |
| 696 // Sigh, must handle negative dividends | |
| 697 Node *zero = _gvn.intcon(0); | |
| 698 IfNode *ifff = jump_if_fork_int(a, zero, BoolTest::lt); | |
| 699 Node *iff = _gvn.transform( new (C, 1) IfFalseNode(ifff) ); | |
| 700 Node *ift = _gvn.transform( new (C, 1) IfTrueNode (ifff) ); | |
| 701 Node *reg = jump_if_join(ift, iff); | |
| 702 Node *phi = PhiNode::make(reg, NULL, TypeInt::INT); | |
| 703 // Negative path; negate/and/negate | |
| 704 Node *neg = _gvn.transform( new (C, 3) SubINode(zero, a) ); | |
| 705 Node *andn= _gvn.transform( new (C, 3) AndINode(neg, mask) ); | |
| 706 Node *negn= _gvn.transform( new (C, 3) SubINode(zero, andn) ); | |
| 707 phi->init_req(1, negn); | |
| 708 // Fast positive case | |
| 709 Node *andx = _gvn.transform( new (C, 3) AndINode(a, mask) ); | |
| 710 phi->init_req(2, andx); | |
| 711 // Push the merge | |
| 712 push( _gvn.transform(phi) ); | |
| 713 return; | |
| 714 } | |
| 715 } | |
| 716 } | |
| 717 // Default case | |
| 718 push( _gvn.transform( new (C, 3) ModINode(control(),a,b) ) ); | |
| 719 } | |
| 720 | |
| 721 // Handle jsr and jsr_w bytecode | |
| 722 void Parse::do_jsr() { | |
| 723 assert(bc() == Bytecodes::_jsr || bc() == Bytecodes::_jsr_w, "wrong bytecode"); | |
| 724 | |
| 725 // Store information about current state, tagged with new _jsr_bci | |
| 726 int return_bci = iter().next_bci(); | |
| 727 int jsr_bci = (bc() == Bytecodes::_jsr) ? iter().get_dest() : iter().get_far_dest(); | |
| 728 | |
| 729 // Update method data | |
| 730 profile_taken_branch(jsr_bci); | |
| 731 | |
| 732 // The way we do things now, there is only one successor block | |
| 733 // for the jsr, because the target code is cloned by ciTypeFlow. | |
| 734 Block* target = successor_for_bci(jsr_bci); | |
| 735 | |
| 736 // What got pushed? | |
| 737 const Type* ret_addr = target->peek(); | |
| 738 assert(ret_addr->singleton(), "must be a constant (cloned jsr body)"); | |
| 739 | |
| 740 // Effect on jsr on stack | |
| 741 push(_gvn.makecon(ret_addr)); | |
| 742 | |
| 743 // Flow to the jsr. | |
| 1172 | 744 if (should_add_predicate(jsr_bci)){ |
| 745 add_predicate(); | |
| 746 } | |
| 0 | 747 merge(jsr_bci); |
| 748 } | |
| 749 | |
| 750 // Handle ret bytecode | |
| 751 void Parse::do_ret() { | |
| 752 // Find to whom we return. | |
| 753 #if 0 // %%%% MAKE THIS WORK | |
| 754 Node* con = local(); | |
| 755 const TypePtr* tp = con->bottom_type()->isa_ptr(); | |
| 756 assert(tp && tp->singleton(), ""); | |
| 757 int return_bci = (int) tp->get_con(); | |
| 758 merge(return_bci); | |
| 759 #else | |
| 760 assert(block()->num_successors() == 1, "a ret can only go one place now"); | |
| 761 Block* target = block()->successor_at(0); | |
| 762 assert(!target->is_ready(), "our arrival must be expected"); | |
| 763 profile_ret(target->flow()->start()); | |
| 764 int pnum = target->next_path_num(); | |
| 765 merge_common(target, pnum); | |
| 766 #endif | |
| 767 } | |
| 768 | |
| 769 //--------------------------dynamic_branch_prediction-------------------------- | |
| 770 // Try to gather dynamic branch prediction behavior. Return a probability | |
| 771 // of the branch being taken and set the "cnt" field. Returns a -1.0 | |
| 772 // if we need to use static prediction for some reason. | |
| 773 float Parse::dynamic_branch_prediction(float &cnt) { | |
| 774 ResourceMark rm; | |
| 775 | |
| 776 cnt = COUNT_UNKNOWN; | |
| 777 | |
| 778 // Use MethodData information if it is available | |
| 779 // FIXME: free the ProfileData structure | |
| 780 ciMethodData* methodData = method()->method_data(); | |
| 781 if (!methodData->is_mature()) return PROB_UNKNOWN; | |
| 782 ciProfileData* data = methodData->bci_to_data(bci()); | |
| 783 if (!data->is_JumpData()) return PROB_UNKNOWN; | |
| 784 | |
| 785 // get taken and not taken values | |
| 786 int taken = data->as_JumpData()->taken(); | |
| 787 int not_taken = 0; | |
| 788 if (data->is_BranchData()) { | |
| 789 not_taken = data->as_BranchData()->not_taken(); | |
| 790 } | |
| 791 | |
| 792 // scale the counts to be commensurate with invocation counts: | |
| 793 taken = method()->scale_count(taken); | |
| 794 not_taken = method()->scale_count(not_taken); | |
| 795 | |
| 796 // Give up if too few counts to be meaningful | |
| 797 if (taken + not_taken < 40) { | |
| 798 if (C->log() != NULL) { | |
| 799 C->log()->elem("branch target_bci='%d' taken='%d' not_taken='%d'", iter().get_dest(), taken, not_taken); | |
| 800 } | |
| 801 return PROB_UNKNOWN; | |
| 802 } | |
| 803 | |
| 804 // Compute frequency that we arrive here | |
| 805 int sum = taken + not_taken; | |
| 806 // Adjust, if this block is a cloned private block but the | |
| 807 // Jump counts are shared. Taken the private counts for | |
| 808 // just this path instead of the shared counts. | |
| 809 if( block()->count() > 0 ) | |
| 810 sum = block()->count(); | |
| 811 cnt = (float)sum / (float)FreqCountInvocations; | |
| 812 | |
| 813 // Pin probability to sane limits | |
| 814 float prob; | |
| 815 if( !taken ) | |
| 816 prob = (0+PROB_MIN) / 2; | |
| 817 else if( !not_taken ) | |
| 818 prob = (1+PROB_MAX) / 2; | |
| 819 else { // Compute probability of true path | |
| 820 prob = (float)taken / (float)(taken + not_taken); | |
| 821 if (prob > PROB_MAX) prob = PROB_MAX; | |
| 822 if (prob < PROB_MIN) prob = PROB_MIN; | |
| 823 } | |
| 824 | |
| 825 assert((cnt > 0.0f) && (prob > 0.0f), | |
| 826 "Bad frequency assignment in if"); | |
| 827 | |
| 828 if (C->log() != NULL) { | |
| 829 const char* prob_str = NULL; | |
| 830 if (prob >= PROB_MAX) prob_str = (prob == PROB_MAX) ? "max" : "always"; | |
| 831 if (prob <= PROB_MIN) prob_str = (prob == PROB_MIN) ? "min" : "never"; | |
| 832 char prob_str_buf[30]; | |
| 833 if (prob_str == NULL) { | |
| 834 sprintf(prob_str_buf, "%g", prob); | |
| 835 prob_str = prob_str_buf; | |
| 836 } | |
| 837 C->log()->elem("branch target_bci='%d' taken='%d' not_taken='%d' cnt='%g' prob='%s'", | |
| 838 iter().get_dest(), taken, not_taken, cnt, prob_str); | |
| 839 } | |
| 840 return prob; | |
| 841 } | |
| 842 | |
| 843 //-----------------------------branch_prediction------------------------------- | |
| 844 float Parse::branch_prediction(float& cnt, | |
| 845 BoolTest::mask btest, | |
| 846 int target_bci) { | |
| 847 float prob = dynamic_branch_prediction(cnt); | |
| 848 // If prob is unknown, switch to static prediction | |
| 849 if (prob != PROB_UNKNOWN) return prob; | |
| 850 | |
| 851 prob = PROB_FAIR; // Set default value | |
| 852 if (btest == BoolTest::eq) // Exactly equal test? | |
| 853 prob = PROB_STATIC_INFREQUENT; // Assume its relatively infrequent | |
| 854 else if (btest == BoolTest::ne) | |
| 855 prob = PROB_STATIC_FREQUENT; // Assume its relatively frequent | |
| 856 | |
| 857 // If this is a conditional test guarding a backwards branch, | |
| 858 // assume its a loop-back edge. Make it a likely taken branch. | |
| 859 if (target_bci < bci()) { | |
| 860 if (is_osr_parse()) { // Could be a hot OSR'd loop; force deopt | |
| 861 // Since it's an OSR, we probably have profile data, but since | |
| 862 // branch_prediction returned PROB_UNKNOWN, the counts are too small. | |
| 863 // Let's make a special check here for completely zero counts. | |
| 864 ciMethodData* methodData = method()->method_data(); | |
| 865 if (!methodData->is_empty()) { | |
| 866 ciProfileData* data = methodData->bci_to_data(bci()); | |
| 867 // Only stop for truly zero counts, which mean an unknown part | |
| 868 // of the OSR-ed method, and we want to deopt to gather more stats. | |
| 869 // If you have ANY counts, then this loop is simply 'cold' relative | |
| 870 // to the OSR loop. | |
| 871 if (data->as_BranchData()->taken() + | |
| 872 data->as_BranchData()->not_taken() == 0 ) { | |
| 873 // This is the only way to return PROB_UNKNOWN: | |
| 874 return PROB_UNKNOWN; | |
| 875 } | |
| 876 } | |
| 877 } | |
| 878 prob = PROB_STATIC_FREQUENT; // Likely to take backwards branch | |
| 879 } | |
| 880 | |
| 881 assert(prob != PROB_UNKNOWN, "must have some guess at this point"); | |
| 882 return prob; | |
| 883 } | |
| 884 | |
| 885 // The magic constants are chosen so as to match the output of | |
| 886 // branch_prediction() when the profile reports a zero taken count. | |
| 887 // It is important to distinguish zero counts unambiguously, because | |
| 888 // some branches (e.g., _213_javac.Assembler.eliminate) validly produce | |
| 889 // very small but nonzero probabilities, which if confused with zero | |
| 890 // counts would keep the program recompiling indefinitely. | |
| 891 bool Parse::seems_never_taken(float prob) { | |
| 892 return prob < PROB_MIN; | |
| 893 } | |
| 894 | |
|
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895 //-------------------------------repush_if_args-------------------------------- |
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896 // Push arguments of an "if" bytecode back onto the stack by adjusting _sp. |
| 1172 | 897 inline int Parse::repush_if_args() { |
| 0 | 898 #ifndef PRODUCT |
| 899 if (PrintOpto && WizardMode) { | |
| 900 tty->print("defending against excessive implicit null exceptions on %s @%d in ", | |
| 901 Bytecodes::name(iter().cur_bc()), iter().cur_bci()); | |
| 902 method()->print_name(); tty->cr(); | |
| 903 } | |
| 904 #endif | |
| 905 int bc_depth = - Bytecodes::depth(iter().cur_bc()); | |
| 906 assert(bc_depth == 1 || bc_depth == 2, "only two kinds of branches"); | |
| 907 DEBUG_ONLY(sync_jvms()); // argument(n) requires a synced jvms | |
| 908 assert(argument(0) != NULL, "must exist"); | |
| 909 assert(bc_depth == 1 || argument(1) != NULL, "two must exist"); | |
| 910 _sp += bc_depth; | |
| 1172 | 911 return bc_depth; |
| 0 | 912 } |
| 913 | |
| 914 //----------------------------------do_ifnull---------------------------------- | |
|
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915 void Parse::do_ifnull(BoolTest::mask btest, Node *c) { |
| 0 | 916 int target_bci = iter().get_dest(); |
| 917 | |
|
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918 Block* branch_block = successor_for_bci(target_bci); |
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919 Block* next_block = successor_for_bci(iter().next_bci()); |
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920 |
| 0 | 921 float cnt; |
| 922 float prob = branch_prediction(cnt, btest, target_bci); | |
| 923 if (prob == PROB_UNKNOWN) { | |
| 924 // (An earlier version of do_ifnull omitted this trap for OSR methods.) | |
| 925 #ifndef PRODUCT | |
| 926 if (PrintOpto && Verbose) | |
|
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927 tty->print_cr("Never-taken edge stops compilation at bci %d",bci()); |
| 0 | 928 #endif |
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929 repush_if_args(); // to gather stats on loop |
| 0 | 930 // We need to mark this branch as taken so that if we recompile we will |
| 931 // see that it is possible. In the tiered system the interpreter doesn't | |
| 932 // do profiling and by the time we get to the lower tier from the interpreter | |
| 933 // the path may be cold again. Make sure it doesn't look untaken | |
| 934 profile_taken_branch(target_bci, !ProfileInterpreter); | |
| 935 uncommon_trap(Deoptimization::Reason_unreached, | |
| 936 Deoptimization::Action_reinterpret, | |
| 937 NULL, "cold"); | |
|
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938 if (EliminateAutoBox) { |
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939 // Mark the successor blocks as parsed |
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940 branch_block->next_path_num(); |
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941 next_block->next_path_num(); |
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942 } |
| 0 | 943 return; |
| 944 } | |
| 945 | |
| 946 explicit_null_checks_inserted++; | |
| 947 | |
| 948 // Generate real control flow | |
| 949 Node *tst = _gvn.transform( new (C, 2) BoolNode( c, btest ) ); | |
| 950 | |
| 951 // Sanity check the probability value | |
| 952 assert(prob > 0.0f,"Bad probability in Parser"); | |
| 953 // Need xform to put node in hash table | |
| 954 IfNode *iff = create_and_xform_if( control(), tst, prob, cnt ); | |
| 955 assert(iff->_prob > 0.0f,"Optimizer made bad probability in parser"); | |
| 956 // True branch | |
| 957 { PreserveJVMState pjvms(this); | |
| 958 Node* iftrue = _gvn.transform( new (C, 1) IfTrueNode (iff) ); | |
| 959 set_control(iftrue); | |
| 960 | |
| 961 if (stopped()) { // Path is dead? | |
| 962 explicit_null_checks_elided++; | |
|
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963 if (EliminateAutoBox) { |
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964 // Mark the successor block as parsed |
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965 branch_block->next_path_num(); |
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966 } |
| 0 | 967 } else { // Path is live. |
| 968 // Update method data | |
| 969 profile_taken_branch(target_bci); | |
| 970 adjust_map_after_if(btest, c, prob, branch_block, next_block); | |
| 1172 | 971 if (!stopped()) { |
| 972 if (should_add_predicate(target_bci)){ // add a predicate if it branches to a loop | |
| 973 int nargs = repush_if_args(); // set original stack for uncommon_trap | |
| 974 add_predicate(); | |
| 975 _sp -= nargs; | |
| 976 } | |
| 0 | 977 merge(target_bci); |
| 1172 | 978 } |
| 0 | 979 } |
| 980 } | |
| 981 | |
| 982 // False branch | |
| 983 Node* iffalse = _gvn.transform( new (C, 1) IfFalseNode(iff) ); | |
| 984 set_control(iffalse); | |
| 985 | |
| 986 if (stopped()) { // Path is dead? | |
| 987 explicit_null_checks_elided++; | |
|
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988 if (EliminateAutoBox) { |
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989 // Mark the successor block as parsed |
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990 next_block->next_path_num(); |
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991 } |
| 0 | 992 } else { // Path is live. |
| 993 // Update method data | |
| 994 profile_not_taken_branch(); | |
| 995 adjust_map_after_if(BoolTest(btest).negate(), c, 1.0-prob, | |
| 996 next_block, branch_block); | |
| 997 } | |
| 998 } | |
| 999 | |
| 1000 //------------------------------------do_if------------------------------------ | |
| 1001 void Parse::do_if(BoolTest::mask btest, Node* c) { | |
| 1002 int target_bci = iter().get_dest(); | |
| 1003 | |
|
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1004 Block* branch_block = successor_for_bci(target_bci); |
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1005 Block* next_block = successor_for_bci(iter().next_bci()); |
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1006 |
| 0 | 1007 float cnt; |
| 1008 float prob = branch_prediction(cnt, btest, target_bci); | |
| 1009 float untaken_prob = 1.0 - prob; | |
| 1010 | |
| 1011 if (prob == PROB_UNKNOWN) { | |
| 1012 #ifndef PRODUCT | |
| 1013 if (PrintOpto && Verbose) | |
|
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1014 tty->print_cr("Never-taken edge stops compilation at bci %d",bci()); |
| 0 | 1015 #endif |
| 1016 repush_if_args(); // to gather stats on loop | |
| 1017 // We need to mark this branch as taken so that if we recompile we will | |
| 1018 // see that it is possible. In the tiered system the interpreter doesn't | |
| 1019 // do profiling and by the time we get to the lower tier from the interpreter | |
| 1020 // the path may be cold again. Make sure it doesn't look untaken | |
| 1021 profile_taken_branch(target_bci, !ProfileInterpreter); | |
| 1022 uncommon_trap(Deoptimization::Reason_unreached, | |
| 1023 Deoptimization::Action_reinterpret, | |
| 1024 NULL, "cold"); | |
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1025 if (EliminateAutoBox) { |
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1026 // Mark the successor blocks as parsed |
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1027 branch_block->next_path_num(); |
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1028 next_block->next_path_num(); |
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1029 } |
| 0 | 1030 return; |
| 1031 } | |
| 1032 | |
| 1033 // Sanity check the probability value | |
| 1034 assert(0.0f < prob && prob < 1.0f,"Bad probability in Parser"); | |
| 1035 | |
| 1036 bool taken_if_true = true; | |
| 1037 // Convert BoolTest to canonical form: | |
| 1038 if (!BoolTest(btest).is_canonical()) { | |
| 1039 btest = BoolTest(btest).negate(); | |
| 1040 taken_if_true = false; | |
| 1041 // prob is NOT updated here; it remains the probability of the taken | |
| 1042 // path (as opposed to the prob of the path guarded by an 'IfTrueNode'). | |
| 1043 } | |
| 1044 assert(btest != BoolTest::eq, "!= is the only canonical exact test"); | |
| 1045 | |
| 1046 Node* tst0 = new (C, 2) BoolNode(c, btest); | |
| 1047 Node* tst = _gvn.transform(tst0); | |
| 1048 BoolTest::mask taken_btest = BoolTest::illegal; | |
| 1049 BoolTest::mask untaken_btest = BoolTest::illegal; | |
|
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1050 |
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1051 if (tst->is_Bool()) { |
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1052 // Refresh c from the transformed bool node, since it may be |
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1053 // simpler than the original c. Also re-canonicalize btest. |
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1054 // This wins when (Bool ne (Conv2B p) 0) => (Bool ne (CmpP p NULL)). |
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1055 // That can arise from statements like: if (x instanceof C) ... |
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1056 if (tst != tst0) { |
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1057 // Canonicalize one more time since transform can change it. |
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1058 btest = tst->as_Bool()->_test._test; |
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1059 if (!BoolTest(btest).is_canonical()) { |
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1060 // Reverse edges one more time... |
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1061 tst = _gvn.transform( tst->as_Bool()->negate(&_gvn) ); |
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1062 btest = tst->as_Bool()->_test._test; |
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1063 assert(BoolTest(btest).is_canonical(), "sanity"); |
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1064 taken_if_true = !taken_if_true; |
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1065 } |
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1066 c = tst->in(1); |
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1067 } |
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1068 BoolTest::mask neg_btest = BoolTest(btest).negate(); |
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1069 taken_btest = taken_if_true ? btest : neg_btest; |
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1070 untaken_btest = taken_if_true ? neg_btest : btest; |
| 0 | 1071 } |
| 1072 | |
| 1073 // Generate real control flow | |
| 1074 float true_prob = (taken_if_true ? prob : untaken_prob); | |
| 1075 IfNode* iff = create_and_map_if(control(), tst, true_prob, cnt); | |
| 1076 assert(iff->_prob > 0.0f,"Optimizer made bad probability in parser"); | |
| 1077 Node* taken_branch = new (C, 1) IfTrueNode(iff); | |
| 1078 Node* untaken_branch = new (C, 1) IfFalseNode(iff); | |
| 1079 if (!taken_if_true) { // Finish conversion to canonical form | |
| 1080 Node* tmp = taken_branch; | |
| 1081 taken_branch = untaken_branch; | |
| 1082 untaken_branch = tmp; | |
| 1083 } | |
| 1084 | |
| 1085 // Branch is taken: | |
| 1086 { PreserveJVMState pjvms(this); | |
| 1087 taken_branch = _gvn.transform(taken_branch); | |
| 1088 set_control(taken_branch); | |
| 1089 | |
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1090 if (stopped()) { |
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1091 if (EliminateAutoBox) { |
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1092 // Mark the successor block as parsed |
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1093 branch_block->next_path_num(); |
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1094 } |
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1095 } else { |
| 0 | 1096 // Update method data |
| 1097 profile_taken_branch(target_bci); | |
| 1098 adjust_map_after_if(taken_btest, c, prob, branch_block, next_block); | |
| 1172 | 1099 if (!stopped()) { |
| 1100 if (should_add_predicate(target_bci)){ // add a predicate if it branches to a loop | |
| 1101 int nargs = repush_if_args(); // set original stack for the uncommon_trap | |
| 1102 add_predicate(); | |
| 1103 _sp -= nargs; | |
| 1104 } | |
| 0 | 1105 merge(target_bci); |
| 1172 | 1106 } |
| 0 | 1107 } |
| 1108 } | |
| 1109 | |
| 1110 untaken_branch = _gvn.transform(untaken_branch); | |
| 1111 set_control(untaken_branch); | |
| 1112 | |
| 1113 // Branch not taken. | |
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1114 if (stopped()) { |
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1115 if (EliminateAutoBox) { |
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1116 // Mark the successor block as parsed |
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1117 next_block->next_path_num(); |
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1118 } |
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1119 } else { |
| 0 | 1120 // Update method data |
| 1121 profile_not_taken_branch(); | |
| 1122 adjust_map_after_if(untaken_btest, c, untaken_prob, | |
| 1123 next_block, branch_block); | |
| 1124 } | |
| 1125 } | |
| 1126 | |
| 1127 //----------------------------adjust_map_after_if------------------------------ | |
| 1128 // Adjust the JVM state to reflect the result of taking this path. | |
| 1129 // Basically, it means inspecting the CmpNode controlling this | |
| 1130 // branch, seeing how it constrains a tested value, and then | |
| 1131 // deciding if it's worth our while to encode this constraint | |
| 1132 // as graph nodes in the current abstract interpretation map. | |
| 1133 void Parse::adjust_map_after_if(BoolTest::mask btest, Node* c, float prob, | |
| 1134 Block* path, Block* other_path) { | |
| 1135 if (stopped() || !c->is_Cmp() || btest == BoolTest::illegal) | |
| 1136 return; // nothing to do | |
| 1137 | |
| 1138 bool is_fallthrough = (path == successor_for_bci(iter().next_bci())); | |
| 1139 | |
| 1140 int cop = c->Opcode(); | |
| 1141 if (seems_never_taken(prob) && cop == Op_CmpP && btest == BoolTest::eq) { | |
| 1142 // (An earlier version of do_if omitted '&& btest == BoolTest::eq'.) | |
| 1143 // | |
| 1144 // If this might possibly turn into an implicit null check, | |
| 1145 // and the null has never yet been seen, we need to generate | |
| 1146 // an uncommon trap, so as to recompile instead of suffering | |
| 1147 // with very slow branches. (We'll get the slow branches if | |
| 1148 // the program ever changes phase and starts seeing nulls here.) | |
| 1149 // | |
| 1150 // The tests we worry about are of the form (p == null). | |
| 1151 // We do not simply inspect for a null constant, since a node may | |
| 1152 // optimize to 'null' later on. | |
| 1153 repush_if_args(); | |
| 1154 // We need to mark this branch as taken so that if we recompile we will | |
| 1155 // see that it is possible. In the tiered system the interpreter doesn't | |
| 1156 // do profiling and by the time we get to the lower tier from the interpreter | |
| 1157 // the path may be cold again. Make sure it doesn't look untaken | |
| 1158 if (is_fallthrough) { | |
| 1159 profile_not_taken_branch(!ProfileInterpreter); | |
| 1160 } else { | |
| 1161 profile_taken_branch(iter().get_dest(), !ProfileInterpreter); | |
| 1162 } | |
| 1163 uncommon_trap(Deoptimization::Reason_unreached, | |
| 1164 Deoptimization::Action_reinterpret, | |
| 1165 NULL, | |
| 1166 (is_fallthrough ? "taken always" : "taken never")); | |
| 1167 return; | |
| 1168 } | |
| 1169 | |
| 1170 Node* val = c->in(1); | |
| 1171 Node* con = c->in(2); | |
| 1172 const Type* tcon = _gvn.type(con); | |
| 1173 const Type* tval = _gvn.type(val); | |
| 1174 bool have_con = tcon->singleton(); | |
| 1175 if (tval->singleton()) { | |
| 1176 if (!have_con) { | |
| 1177 // Swap, so constant is in con. | |
| 1178 con = val; | |
| 1179 tcon = tval; | |
| 1180 val = c->in(2); | |
| 1181 tval = _gvn.type(val); | |
| 1182 btest = BoolTest(btest).commute(); | |
| 1183 have_con = true; | |
| 1184 } else { | |
| 1185 // Do we have two constants? Then leave well enough alone. | |
| 1186 have_con = false; | |
| 1187 } | |
| 1188 } | |
| 1189 if (!have_con) // remaining adjustments need a con | |
| 1190 return; | |
| 1191 | |
| 1192 | |
| 1193 int val_in_map = map()->find_edge(val); | |
| 1194 if (val_in_map < 0) return; // replace_in_map would be useless | |
| 1195 { | |
| 1196 JVMState* jvms = this->jvms(); | |
| 1197 if (!(jvms->is_loc(val_in_map) || | |
| 1198 jvms->is_stk(val_in_map))) | |
| 1199 return; // again, it would be useless | |
| 1200 } | |
| 1201 | |
| 1202 // Check for a comparison to a constant, and "know" that the compared | |
| 1203 // value is constrained on this path. | |
| 1204 assert(tcon->singleton(), ""); | |
| 1205 ConstraintCastNode* ccast = NULL; | |
| 1206 Node* cast = NULL; | |
| 1207 | |
| 1208 switch (btest) { | |
| 1209 case BoolTest::eq: // Constant test? | |
| 1210 { | |
| 1211 const Type* tboth = tcon->join(tval); | |
| 1212 if (tboth == tval) break; // Nothing to gain. | |
| 1213 if (tcon->isa_int()) { | |
| 1214 ccast = new (C, 2) CastIINode(val, tboth); | |
| 1215 } else if (tcon == TypePtr::NULL_PTR) { | |
| 1216 // Cast to null, but keep the pointer identity temporarily live. | |
| 1217 ccast = new (C, 2) CastPPNode(val, tboth); | |
| 1218 } else { | |
| 1219 const TypeF* tf = tcon->isa_float_constant(); | |
| 1220 const TypeD* td = tcon->isa_double_constant(); | |
| 1221 // Exclude tests vs float/double 0 as these could be | |
| 1222 // either +0 or -0. Just because you are equal to +0 | |
| 1223 // doesn't mean you ARE +0! | |
| 1224 if ((!tf || tf->_f != 0.0) && | |
| 1225 (!td || td->_d != 0.0)) | |
| 1226 cast = con; // Replace non-constant val by con. | |
| 1227 } | |
| 1228 } | |
| 1229 break; | |
| 1230 | |
| 1231 case BoolTest::ne: | |
| 1232 if (tcon == TypePtr::NULL_PTR) { | |
| 1233 cast = cast_not_null(val, false); | |
| 1234 } | |
| 1235 break; | |
| 1236 | |
| 1237 default: | |
| 1238 // (At this point we could record int range types with CastII.) | |
| 1239 break; | |
| 1240 } | |
| 1241 | |
| 1242 if (ccast != NULL) { | |
| 1243 const Type* tcc = ccast->as_Type()->type(); | |
| 1244 assert(tcc != tval && tcc->higher_equal(tval), "must improve"); | |
| 1245 // Delay transform() call to allow recovery of pre-cast value | |
| 1246 // at the control merge. | |
| 1247 ccast->set_req(0, control()); | |
| 1248 _gvn.set_type_bottom(ccast); | |
| 1249 record_for_igvn(ccast); | |
| 1250 cast = ccast; | |
| 1251 } | |
| 1252 | |
| 1253 if (cast != NULL) { // Here's the payoff. | |
| 1254 replace_in_map(val, cast); | |
| 1255 } | |
| 1256 } | |
| 1257 | |
| 1258 | |
| 1259 //------------------------------do_one_bytecode-------------------------------- | |
| 1260 // Parse this bytecode, and alter the Parsers JVM->Node mapping | |
| 1261 void Parse::do_one_bytecode() { | |
| 1262 Node *a, *b, *c, *d; // Handy temps | |
| 1263 BoolTest::mask btest; | |
| 1264 int i; | |
| 1265 | |
| 1266 assert(!has_exceptions(), "bytecode entry state must be clear of throws"); | |
| 1267 | |
| 1268 if (C->check_node_count(NodeLimitFudgeFactor * 5, | |
| 1269 "out of nodes parsing method")) { | |
| 1270 return; | |
| 1271 } | |
| 1272 | |
| 1273 #ifdef ASSERT | |
| 1274 // for setting breakpoints | |
| 1275 if (TraceOptoParse) { | |
| 1276 tty->print(" @"); | |
| 1277 dump_bci(bci()); | |
| 1278 } | |
| 1279 #endif | |
| 1280 | |
| 1281 switch (bc()) { | |
| 1282 case Bytecodes::_nop: | |
| 1283 // do nothing | |
| 1284 break; | |
| 1285 case Bytecodes::_lconst_0: | |
| 1286 push_pair(longcon(0)); | |
| 1287 break; | |
| 1288 | |
| 1289 case Bytecodes::_lconst_1: | |
| 1290 push_pair(longcon(1)); | |
| 1291 break; | |
| 1292 | |
| 1293 case Bytecodes::_fconst_0: | |
| 1294 push(zerocon(T_FLOAT)); | |
| 1295 break; | |
| 1296 | |
| 1297 case Bytecodes::_fconst_1: | |
| 1298 push(makecon(TypeF::ONE)); | |
| 1299 break; | |
| 1300 | |
| 1301 case Bytecodes::_fconst_2: | |
| 1302 push(makecon(TypeF::make(2.0f))); | |
| 1303 break; | |
| 1304 | |
| 1305 case Bytecodes::_dconst_0: | |
| 1306 push_pair(zerocon(T_DOUBLE)); | |
| 1307 break; | |
| 1308 | |
| 1309 case Bytecodes::_dconst_1: | |
| 1310 push_pair(makecon(TypeD::ONE)); | |
| 1311 break; | |
| 1312 | |
| 1313 case Bytecodes::_iconst_m1:push(intcon(-1)); break; | |
| 1314 case Bytecodes::_iconst_0: push(intcon( 0)); break; | |
| 1315 case Bytecodes::_iconst_1: push(intcon( 1)); break; | |
| 1316 case Bytecodes::_iconst_2: push(intcon( 2)); break; | |
| 1317 case Bytecodes::_iconst_3: push(intcon( 3)); break; | |
| 1318 case Bytecodes::_iconst_4: push(intcon( 4)); break; | |
| 1319 case Bytecodes::_iconst_5: push(intcon( 5)); break; | |
| 1565 | 1320 case Bytecodes::_bipush: push(intcon(iter().get_constant_u1())); break; |
| 1321 case Bytecodes::_sipush: push(intcon(iter().get_constant_u2())); break; | |
| 0 | 1322 case Bytecodes::_aconst_null: push(null()); break; |
| 1323 case Bytecodes::_ldc: | |
| 1324 case Bytecodes::_ldc_w: | |
| 1325 case Bytecodes::_ldc2_w: | |
| 1326 // If the constant is unresolved, run this BC once in the interpreter. | |
| 1327 if (iter().is_unresolved_string()) { | |
| 1328 uncommon_trap(Deoptimization::make_trap_request | |
| 1329 (Deoptimization::Reason_unloaded, | |
| 1330 Deoptimization::Action_reinterpret, | |
| 1331 iter().get_constant_index()), | |
| 1332 NULL, "unresolved_string"); | |
| 1333 break; | |
| 1334 } else { | |
| 1335 ciConstant constant = iter().get_constant(); | |
| 1336 if (constant.basic_type() == T_OBJECT) { | |
| 1337 ciObject* c = constant.as_object(); | |
| 1338 if (c->is_klass()) { | |
| 1339 // The constant returned for a klass is the ciKlass for the | |
| 1340 // entry. We want the java_mirror so get it. | |
| 1341 ciKlass* klass = c->as_klass(); | |
| 1342 if (klass->is_loaded()) { | |
| 1343 constant = ciConstant(T_OBJECT, klass->java_mirror()); | |
| 1344 } else { | |
| 1345 uncommon_trap(Deoptimization::make_trap_request | |
| 1346 (Deoptimization::Reason_unloaded, | |
| 1347 Deoptimization::Action_reinterpret, | |
| 1348 iter().get_constant_index()), | |
| 1349 NULL, "unresolved_klass"); | |
| 1350 break; | |
| 1351 } | |
| 1352 } | |
| 1353 } | |
|
989
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jrose
parents:
844
diff
changeset
|
1354 bool pushed = push_constant(constant, true); |
|
148e5441d916
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jrose
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844
diff
changeset
|
1355 guarantee(pushed, "must be possible to push this constant"); |
| 0 | 1356 } |
| 1357 | |
| 1358 break; | |
| 1359 | |
| 1360 case Bytecodes::_aload_0: | |
| 1361 push( local(0) ); | |
| 1362 break; | |
| 1363 case Bytecodes::_aload_1: | |
| 1364 push( local(1) ); | |
| 1365 break; | |
| 1366 case Bytecodes::_aload_2: | |
| 1367 push( local(2) ); | |
| 1368 break; | |
| 1369 case Bytecodes::_aload_3: | |
| 1370 push( local(3) ); | |
| 1371 break; | |
| 1372 case Bytecodes::_aload: | |
| 1373 push( local(iter().get_index()) ); | |
| 1374 break; | |
| 1375 | |
| 1376 case Bytecodes::_fload_0: | |
| 1377 case Bytecodes::_iload_0: | |
| 1378 push( local(0) ); | |
| 1379 break; | |
| 1380 case Bytecodes::_fload_1: | |
| 1381 case Bytecodes::_iload_1: | |
| 1382 push( local(1) ); | |
| 1383 break; | |
| 1384 case Bytecodes::_fload_2: | |
| 1385 case Bytecodes::_iload_2: | |
| 1386 push( local(2) ); | |
| 1387 break; | |
| 1388 case Bytecodes::_fload_3: | |
| 1389 case Bytecodes::_iload_3: | |
| 1390 push( local(3) ); | |
| 1391 break; | |
| 1392 case Bytecodes::_fload: | |
| 1393 case Bytecodes::_iload: | |
| 1394 push( local(iter().get_index()) ); | |
| 1395 break; | |
| 1396 case Bytecodes::_lload_0: | |
| 1397 push_pair_local( 0 ); | |
| 1398 break; | |
| 1399 case Bytecodes::_lload_1: | |
| 1400 push_pair_local( 1 ); | |
| 1401 break; | |
| 1402 case Bytecodes::_lload_2: | |
| 1403 push_pair_local( 2 ); | |
| 1404 break; | |
| 1405 case Bytecodes::_lload_3: | |
| 1406 push_pair_local( 3 ); | |
| 1407 break; | |
| 1408 case Bytecodes::_lload: | |
| 1409 push_pair_local( iter().get_index() ); | |
| 1410 break; | |
| 1411 | |
| 1412 case Bytecodes::_dload_0: | |
| 1413 push_pair_local(0); | |
| 1414 break; | |
| 1415 case Bytecodes::_dload_1: | |
| 1416 push_pair_local(1); | |
| 1417 break; | |
| 1418 case Bytecodes::_dload_2: | |
| 1419 push_pair_local(2); | |
| 1420 break; | |
| 1421 case Bytecodes::_dload_3: | |
| 1422 push_pair_local(3); | |
| 1423 break; | |
| 1424 case Bytecodes::_dload: | |
| 1425 push_pair_local(iter().get_index()); | |
| 1426 break; | |
| 1427 case Bytecodes::_fstore_0: | |
| 1428 case Bytecodes::_istore_0: | |
| 1429 case Bytecodes::_astore_0: | |
| 1430 set_local( 0, pop() ); | |
| 1431 break; | |
| 1432 case Bytecodes::_fstore_1: | |
| 1433 case Bytecodes::_istore_1: | |
| 1434 case Bytecodes::_astore_1: | |
| 1435 set_local( 1, pop() ); | |
| 1436 break; | |
| 1437 case Bytecodes::_fstore_2: | |
| 1438 case Bytecodes::_istore_2: | |
| 1439 case Bytecodes::_astore_2: | |
| 1440 set_local( 2, pop() ); | |
| 1441 break; | |
| 1442 case Bytecodes::_fstore_3: | |
| 1443 case Bytecodes::_istore_3: | |
| 1444 case Bytecodes::_astore_3: | |
| 1445 set_local( 3, pop() ); | |
| 1446 break; | |
| 1447 case Bytecodes::_fstore: | |
| 1448 case Bytecodes::_istore: | |
| 1449 case Bytecodes::_astore: | |
| 1450 set_local( iter().get_index(), pop() ); | |
| 1451 break; | |
| 1452 // long stores | |
| 1453 case Bytecodes::_lstore_0: | |
| 1454 set_pair_local( 0, pop_pair() ); | |
| 1455 break; | |
| 1456 case Bytecodes::_lstore_1: | |
| 1457 set_pair_local( 1, pop_pair() ); | |
| 1458 break; | |
| 1459 case Bytecodes::_lstore_2: | |
| 1460 set_pair_local( 2, pop_pair() ); | |
| 1461 break; | |
| 1462 case Bytecodes::_lstore_3: | |
| 1463 set_pair_local( 3, pop_pair() ); | |
| 1464 break; | |
| 1465 case Bytecodes::_lstore: | |
| 1466 set_pair_local( iter().get_index(), pop_pair() ); | |
| 1467 break; | |
| 1468 | |
| 1469 // double stores | |
| 1470 case Bytecodes::_dstore_0: | |
| 1471 set_pair_local( 0, dstore_rounding(pop_pair()) ); | |
| 1472 break; | |
| 1473 case Bytecodes::_dstore_1: | |
| 1474 set_pair_local( 1, dstore_rounding(pop_pair()) ); | |
| 1475 break; | |
| 1476 case Bytecodes::_dstore_2: | |
| 1477 set_pair_local( 2, dstore_rounding(pop_pair()) ); | |
| 1478 break; | |
| 1479 case Bytecodes::_dstore_3: | |
| 1480 set_pair_local( 3, dstore_rounding(pop_pair()) ); | |
| 1481 break; | |
| 1482 case Bytecodes::_dstore: | |
| 1483 set_pair_local( iter().get_index(), dstore_rounding(pop_pair()) ); | |
| 1484 break; | |
| 1485 | |
| 1486 case Bytecodes::_pop: _sp -= 1; break; | |
| 1487 case Bytecodes::_pop2: _sp -= 2; break; | |
| 1488 case Bytecodes::_swap: | |
| 1489 a = pop(); | |
| 1490 b = pop(); | |
| 1491 push(a); | |
| 1492 push(b); | |
| 1493 break; | |
| 1494 case Bytecodes::_dup: | |
| 1495 a = pop(); | |
| 1496 push(a); | |
| 1497 push(a); | |
| 1498 break; | |
| 1499 case Bytecodes::_dup_x1: | |
| 1500 a = pop(); | |
| 1501 b = pop(); | |
| 1502 push( a ); | |
| 1503 push( b ); | |
| 1504 push( a ); | |
| 1505 break; | |
| 1506 case Bytecodes::_dup_x2: | |
| 1507 a = pop(); | |
| 1508 b = pop(); | |
| 1509 c = pop(); | |
| 1510 push( a ); | |
| 1511 push( c ); | |
| 1512 push( b ); | |
| 1513 push( a ); | |
| 1514 break; | |
| 1515 case Bytecodes::_dup2: | |
| 1516 a = pop(); | |
| 1517 b = pop(); | |
| 1518 push( b ); | |
| 1519 push( a ); | |
| 1520 push( b ); | |
| 1521 push( a ); | |
| 1522 break; | |
| 1523 | |
| 1524 case Bytecodes::_dup2_x1: | |
| 1525 // before: .. c, b, a | |
| 1526 // after: .. b, a, c, b, a | |
| 1527 // not tested | |
| 1528 a = pop(); | |
| 1529 b = pop(); | |
| 1530 c = pop(); | |
| 1531 push( b ); | |
| 1532 push( a ); | |
| 1533 push( c ); | |
| 1534 push( b ); | |
| 1535 push( a ); | |
| 1536 break; | |
| 1537 case Bytecodes::_dup2_x2: | |
| 1538 // before: .. d, c, b, a | |
| 1539 // after: .. b, a, d, c, b, a | |
| 1540 // not tested | |
| 1541 a = pop(); | |
| 1542 b = pop(); | |
| 1543 c = pop(); | |
| 1544 d = pop(); | |
| 1545 push( b ); | |
| 1546 push( a ); | |
| 1547 push( d ); | |
| 1548 push( c ); | |
| 1549 push( b ); | |
| 1550 push( a ); | |
| 1551 break; | |
| 1552 | |
| 1553 case Bytecodes::_arraylength: { | |
| 1554 // Must do null-check with value on expression stack | |
| 1555 Node *ary = do_null_check(peek(), T_ARRAY); | |
| 1556 // Compile-time detect of null-exception? | |
| 1557 if (stopped()) return; | |
| 1558 a = pop(); | |
| 1559 push(load_array_length(a)); | |
| 1560 break; | |
| 1561 } | |
| 1562 | |
| 1563 case Bytecodes::_baload: array_load(T_BYTE); break; | |
| 1564 case Bytecodes::_caload: array_load(T_CHAR); break; | |
| 1565 case Bytecodes::_iaload: array_load(T_INT); break; | |
| 1566 case Bytecodes::_saload: array_load(T_SHORT); break; | |
| 1567 case Bytecodes::_faload: array_load(T_FLOAT); break; | |
| 1568 case Bytecodes::_aaload: array_load(T_OBJECT); break; | |
| 1569 case Bytecodes::_laload: { | |
| 1570 a = array_addressing(T_LONG, 0); | |
| 605 | 1571 if (stopped()) return; // guaranteed null or range check |
| 0 | 1572 _sp -= 2; // Pop array and index |
| 1573 push_pair( make_load(control(), a, TypeLong::LONG, T_LONG, TypeAryPtr::LONGS)); | |
| 1574 break; | |
| 1575 } | |
| 1576 case Bytecodes::_daload: { | |
| 1577 a = array_addressing(T_DOUBLE, 0); | |
| 605 | 1578 if (stopped()) return; // guaranteed null or range check |
| 0 | 1579 _sp -= 2; // Pop array and index |
| 1580 push_pair( make_load(control(), a, Type::DOUBLE, T_DOUBLE, TypeAryPtr::DOUBLES)); | |
| 1581 break; | |
| 1582 } | |
| 1583 case Bytecodes::_bastore: array_store(T_BYTE); break; | |
| 1584 case Bytecodes::_castore: array_store(T_CHAR); break; | |
| 1585 case Bytecodes::_iastore: array_store(T_INT); break; | |
| 1586 case Bytecodes::_sastore: array_store(T_SHORT); break; | |
| 1587 case Bytecodes::_fastore: array_store(T_FLOAT); break; | |
| 1588 case Bytecodes::_aastore: { | |
| 1589 d = array_addressing(T_OBJECT, 1); | |
| 605 | 1590 if (stopped()) return; // guaranteed null or range check |
| 0 | 1591 array_store_check(); |
| 1592 c = pop(); // Oop to store | |
| 1593 b = pop(); // index (already used) | |
| 1594 a = pop(); // the array itself | |
|
827
bf3489cc0aa0
6856025: assert(_base >= OopPtr && _base <= KlassPtr,"Not a Java pointer")
never
parents:
825
diff
changeset
|
1595 const TypeOopPtr* elemtype = _gvn.type(a)->is_aryptr()->elem()->make_oopptr(); |
| 0 | 1596 const TypeAryPtr* adr_type = TypeAryPtr::OOPS; |
| 1597 Node* store = store_oop_to_array(control(), a, d, adr_type, c, elemtype, T_OBJECT); | |
| 1598 break; | |
| 1599 } | |
| 1600 case Bytecodes::_lastore: { | |
| 1601 a = array_addressing(T_LONG, 2); | |
| 605 | 1602 if (stopped()) return; // guaranteed null or range check |
| 0 | 1603 c = pop_pair(); |
| 1604 _sp -= 2; // Pop array and index | |
| 1605 store_to_memory(control(), a, c, T_LONG, TypeAryPtr::LONGS); | |
| 1606 break; | |
| 1607 } | |
| 1608 case Bytecodes::_dastore: { | |
| 1609 a = array_addressing(T_DOUBLE, 2); | |
| 605 | 1610 if (stopped()) return; // guaranteed null or range check |
| 0 | 1611 c = pop_pair(); |
| 1612 _sp -= 2; // Pop array and index | |
| 1613 c = dstore_rounding(c); | |
| 1614 store_to_memory(control(), a, c, T_DOUBLE, TypeAryPtr::DOUBLES); | |
| 1615 break; | |
| 1616 } | |
| 1617 case Bytecodes::_getfield: | |
| 1618 do_getfield(); | |
| 1619 break; | |
| 1620 | |
| 1621 case Bytecodes::_getstatic: | |
| 1622 do_getstatic(); | |
| 1623 break; | |
| 1624 | |
| 1625 case Bytecodes::_putfield: | |
| 1626 do_putfield(); | |
| 1627 break; | |
| 1628 | |
| 1629 case Bytecodes::_putstatic: | |
| 1630 do_putstatic(); | |
| 1631 break; | |
| 1632 | |
| 1633 case Bytecodes::_irem: | |
| 1634 do_irem(); | |
| 1635 break; | |
| 1636 case Bytecodes::_idiv: | |
| 1637 // Must keep both values on the expression-stack during null-check | |
| 1638 do_null_check(peek(), T_INT); | |
| 1639 // Compile-time detect of null-exception? | |
| 1640 if (stopped()) return; | |
| 1641 b = pop(); | |
| 1642 a = pop(); | |
| 1643 push( _gvn.transform( new (C, 3) DivINode(control(),a,b) ) ); | |
| 1644 break; | |
| 1645 case Bytecodes::_imul: | |
| 1646 b = pop(); a = pop(); | |
| 1647 push( _gvn.transform( new (C, 3) MulINode(a,b) ) ); | |
| 1648 break; | |
| 1649 case Bytecodes::_iadd: | |
| 1650 b = pop(); a = pop(); | |
| 1651 push( _gvn.transform( new (C, 3) AddINode(a,b) ) ); | |
| 1652 break; | |
| 1653 case Bytecodes::_ineg: | |
| 1654 a = pop(); | |
| 1655 push( _gvn.transform( new (C, 3) SubINode(_gvn.intcon(0),a)) ); | |
| 1656 break; | |
| 1657 case Bytecodes::_isub: | |
| 1658 b = pop(); a = pop(); | |
| 1659 push( _gvn.transform( new (C, 3) SubINode(a,b) ) ); | |
| 1660 break; | |
| 1661 case Bytecodes::_iand: | |
| 1662 b = pop(); a = pop(); | |
| 1663 push( _gvn.transform( new (C, 3) AndINode(a,b) ) ); | |
| 1664 break; | |
| 1665 case Bytecodes::_ior: | |
| 1666 b = pop(); a = pop(); | |
| 1667 push( _gvn.transform( new (C, 3) OrINode(a,b) ) ); | |
| 1668 break; | |
| 1669 case Bytecodes::_ixor: | |
| 1670 b = pop(); a = pop(); | |
| 1671 push( _gvn.transform( new (C, 3) XorINode(a,b) ) ); | |
| 1672 break; | |
| 1673 case Bytecodes::_ishl: | |
| 1674 b = pop(); a = pop(); | |
| 1675 push( _gvn.transform( new (C, 3) LShiftINode(a,b) ) ); | |
| 1676 break; | |
| 1677 case Bytecodes::_ishr: | |
| 1678 b = pop(); a = pop(); | |
| 1679 push( _gvn.transform( new (C, 3) RShiftINode(a,b) ) ); | |
| 1680 break; | |
| 1681 case Bytecodes::_iushr: | |
| 1682 b = pop(); a = pop(); | |
| 1683 push( _gvn.transform( new (C, 3) URShiftINode(a,b) ) ); | |
| 1684 break; | |
| 1685 | |
| 1686 case Bytecodes::_fneg: | |
| 1687 a = pop(); | |
| 1688 b = _gvn.transform(new (C, 2) NegFNode (a)); | |
| 1689 push(b); | |
| 1690 break; | |
| 1691 | |
| 1692 case Bytecodes::_fsub: | |
| 1693 b = pop(); | |
| 1694 a = pop(); | |
| 1695 c = _gvn.transform( new (C, 3) SubFNode(a,b) ); | |
| 1696 d = precision_rounding(c); | |
| 1697 push( d ); | |
| 1698 break; | |
| 1699 | |
| 1700 case Bytecodes::_fadd: | |
| 1701 b = pop(); | |
| 1702 a = pop(); | |
| 1703 c = _gvn.transform( new (C, 3) AddFNode(a,b) ); | |
| 1704 d = precision_rounding(c); | |
| 1705 push( d ); | |
| 1706 break; | |
| 1707 | |
| 1708 case Bytecodes::_fmul: | |
| 1709 b = pop(); | |
| 1710 a = pop(); | |
| 1711 c = _gvn.transform( new (C, 3) MulFNode(a,b) ); | |
| 1712 d = precision_rounding(c); | |
| 1713 push( d ); | |
| 1714 break; | |
| 1715 | |
| 1716 case Bytecodes::_fdiv: | |
| 1717 b = pop(); | |
| 1718 a = pop(); | |
| 1719 c = _gvn.transform( new (C, 3) DivFNode(0,a,b) ); | |
| 1720 d = precision_rounding(c); | |
| 1721 push( d ); | |
| 1722 break; | |
| 1723 | |
| 1724 case Bytecodes::_frem: | |
| 1725 if (Matcher::has_match_rule(Op_ModF)) { | |
| 1726 // Generate a ModF node. | |
| 1727 b = pop(); | |
| 1728 a = pop(); | |
| 1729 c = _gvn.transform( new (C, 3) ModFNode(0,a,b) ); | |
| 1730 d = precision_rounding(c); | |
| 1731 push( d ); | |
| 1732 } | |
| 1733 else { | |
| 1734 // Generate a call. | |
| 1735 modf(); | |
| 1736 } | |
| 1737 break; | |
| 1738 | |
| 1739 case Bytecodes::_fcmpl: | |
| 1740 b = pop(); | |
| 1741 a = pop(); | |
| 1742 c = _gvn.transform( new (C, 3) CmpF3Node( a, b)); | |
| 1743 push(c); | |
| 1744 break; | |
| 1745 case Bytecodes::_fcmpg: | |
| 1746 b = pop(); | |
| 1747 a = pop(); | |
| 1748 | |
| 1749 // Same as fcmpl but need to flip the unordered case. Swap the inputs, | |
| 1750 // which negates the result sign except for unordered. Flip the unordered | |
| 1751 // as well by using CmpF3 which implements unordered-lesser instead of | |
| 1752 // unordered-greater semantics. Finally, commute the result bits. Result | |
| 1753 // is same as using a CmpF3Greater except we did it with CmpF3 alone. | |
| 1754 c = _gvn.transform( new (C, 3) CmpF3Node( b, a)); | |
| 1755 c = _gvn.transform( new (C, 3) SubINode(_gvn.intcon(0),c) ); | |
| 1756 push(c); | |
| 1757 break; | |
| 1758 | |
| 1759 case Bytecodes::_f2i: | |
| 1760 a = pop(); | |
| 1761 push(_gvn.transform(new (C, 2) ConvF2INode(a))); | |
| 1762 break; | |
| 1763 | |
| 1764 case Bytecodes::_d2i: | |
| 1765 a = pop_pair(); | |
| 1766 b = _gvn.transform(new (C, 2) ConvD2INode(a)); | |
| 1767 push( b ); | |
| 1768 break; | |
| 1769 | |
| 1770 case Bytecodes::_f2d: | |
| 1771 a = pop(); | |
| 1772 b = _gvn.transform( new (C, 2) ConvF2DNode(a)); | |
| 1773 push_pair( b ); | |
| 1774 break; | |
| 1775 | |
| 1776 case Bytecodes::_d2f: | |
| 1777 a = pop_pair(); | |
| 1778 b = _gvn.transform( new (C, 2) ConvD2FNode(a)); | |
| 1779 // This breaks _227_mtrt (speed & correctness) and _222_mpegaudio (speed) | |
| 1780 //b = _gvn.transform(new (C, 2) RoundFloatNode(0, b) ); | |
| 1781 push( b ); | |
| 1782 break; | |
| 1783 | |
| 1784 case Bytecodes::_l2f: | |
| 1785 if (Matcher::convL2FSupported()) { | |
| 1786 a = pop_pair(); | |
| 1787 b = _gvn.transform( new (C, 2) ConvL2FNode(a)); | |
| 1788 // For i486.ad, FILD doesn't restrict precision to 24 or 53 bits. | |
| 1789 // Rather than storing the result into an FP register then pushing | |
| 1790 // out to memory to round, the machine instruction that implements | |
| 1791 // ConvL2D is responsible for rounding. | |
| 1792 // c = precision_rounding(b); | |
| 1793 c = _gvn.transform(b); | |
| 1794 push(c); | |
| 1795 } else { | |
| 1796 l2f(); | |
| 1797 } | |
| 1798 break; | |
| 1799 | |
| 1800 case Bytecodes::_l2d: | |
| 1801 a = pop_pair(); | |
| 1802 b = _gvn.transform( new (C, 2) ConvL2DNode(a)); | |
| 1803 // For i486.ad, rounding is always necessary (see _l2f above). | |
| 1804 // c = dprecision_rounding(b); | |
| 1805 c = _gvn.transform(b); | |
| 1806 push_pair(c); | |
| 1807 break; | |
| 1808 | |
| 1809 case Bytecodes::_f2l: | |
| 1810 a = pop(); | |
| 1811 b = _gvn.transform( new (C, 2) ConvF2LNode(a)); | |
| 1812 push_pair(b); | |
| 1813 break; | |
| 1814 | |
| 1815 case Bytecodes::_d2l: | |
| 1816 a = pop_pair(); | |
| 1817 b = _gvn.transform( new (C, 2) ConvD2LNode(a)); | |
| 1818 push_pair(b); | |
| 1819 break; | |
| 1820 | |
| 1821 case Bytecodes::_dsub: | |
| 1822 b = pop_pair(); | |
| 1823 a = pop_pair(); | |
| 1824 c = _gvn.transform( new (C, 3) SubDNode(a,b) ); | |
| 1825 d = dprecision_rounding(c); | |
| 1826 push_pair( d ); | |
| 1827 break; | |
| 1828 | |
| 1829 case Bytecodes::_dadd: | |
| 1830 b = pop_pair(); | |
| 1831 a = pop_pair(); | |
| 1832 c = _gvn.transform( new (C, 3) AddDNode(a,b) ); | |
| 1833 d = dprecision_rounding(c); | |
| 1834 push_pair( d ); | |
| 1835 break; | |
| 1836 | |
| 1837 case Bytecodes::_dmul: | |
| 1838 b = pop_pair(); | |
| 1839 a = pop_pair(); | |
| 1840 c = _gvn.transform( new (C, 3) MulDNode(a,b) ); | |
| 1841 d = dprecision_rounding(c); | |
| 1842 push_pair( d ); | |
| 1843 break; | |
| 1844 | |
| 1845 case Bytecodes::_ddiv: | |
| 1846 b = pop_pair(); | |
| 1847 a = pop_pair(); | |
| 1848 c = _gvn.transform( new (C, 3) DivDNode(0,a,b) ); | |
| 1849 d = dprecision_rounding(c); | |
| 1850 push_pair( d ); | |
| 1851 break; | |
| 1852 | |
| 1853 case Bytecodes::_dneg: | |
| 1854 a = pop_pair(); | |
| 1855 b = _gvn.transform(new (C, 2) NegDNode (a)); | |
| 1856 push_pair(b); | |
| 1857 break; | |
| 1858 | |
| 1859 case Bytecodes::_drem: | |
| 1860 if (Matcher::has_match_rule(Op_ModD)) { | |
| 1861 // Generate a ModD node. | |
| 1862 b = pop_pair(); | |
| 1863 a = pop_pair(); | |
| 1864 // a % b | |
| 1865 | |
| 1866 c = _gvn.transform( new (C, 3) ModDNode(0,a,b) ); | |
| 1867 d = dprecision_rounding(c); | |
| 1868 push_pair( d ); | |
| 1869 } | |
| 1870 else { | |
| 1871 // Generate a call. | |
| 1872 modd(); | |
| 1873 } | |
| 1874 break; | |
| 1875 | |
| 1876 case Bytecodes::_dcmpl: | |
| 1877 b = pop_pair(); | |
| 1878 a = pop_pair(); | |
| 1879 c = _gvn.transform( new (C, 3) CmpD3Node( a, b)); | |
| 1880 push(c); | |
| 1881 break; | |
| 1882 | |
| 1883 case Bytecodes::_dcmpg: | |
| 1884 b = pop_pair(); | |
| 1885 a = pop_pair(); | |
| 1886 // Same as dcmpl but need to flip the unordered case. | |
| 1887 // Commute the inputs, which negates the result sign except for unordered. | |
| 1888 // Flip the unordered as well by using CmpD3 which implements | |
| 1889 // unordered-lesser instead of unordered-greater semantics. | |
| 1890 // Finally, negate the result bits. Result is same as using a | |
| 1891 // CmpD3Greater except we did it with CmpD3 alone. | |
| 1892 c = _gvn.transform( new (C, 3) CmpD3Node( b, a)); | |
| 1893 c = _gvn.transform( new (C, 3) SubINode(_gvn.intcon(0),c) ); | |
| 1894 push(c); | |
| 1895 break; | |
| 1896 | |
| 1897 | |
| 1898 // Note for longs -> lo word is on TOS, hi word is on TOS - 1 | |
| 1899 case Bytecodes::_land: | |
| 1900 b = pop_pair(); | |
| 1901 a = pop_pair(); | |
| 1902 c = _gvn.transform( new (C, 3) AndLNode(a,b) ); | |
| 1903 push_pair(c); | |
| 1904 break; | |
| 1905 case Bytecodes::_lor: | |
| 1906 b = pop_pair(); | |
| 1907 a = pop_pair(); | |
| 1908 c = _gvn.transform( new (C, 3) OrLNode(a,b) ); | |
| 1909 push_pair(c); | |
| 1910 break; | |
| 1911 case Bytecodes::_lxor: | |
| 1912 b = pop_pair(); | |
| 1913 a = pop_pair(); | |
| 1914 c = _gvn.transform( new (C, 3) XorLNode(a,b) ); | |
| 1915 push_pair(c); | |
| 1916 break; | |
| 1917 | |
| 1918 case Bytecodes::_lshl: | |
| 1919 b = pop(); // the shift count | |
| 1920 a = pop_pair(); // value to be shifted | |
| 1921 c = _gvn.transform( new (C, 3) LShiftLNode(a,b) ); | |
| 1922 push_pair(c); | |
| 1923 break; | |
| 1924 case Bytecodes::_lshr: | |
| 1925 b = pop(); // the shift count | |
| 1926 a = pop_pair(); // value to be shifted | |
| 1927 c = _gvn.transform( new (C, 3) RShiftLNode(a,b) ); | |
| 1928 push_pair(c); | |
| 1929 break; | |
| 1930 case Bytecodes::_lushr: | |
| 1931 b = pop(); // the shift count | |
| 1932 a = pop_pair(); // value to be shifted | |
| 1933 c = _gvn.transform( new (C, 3) URShiftLNode(a,b) ); | |
| 1934 push_pair(c); | |
| 1935 break; | |
| 1936 case Bytecodes::_lmul: | |
| 1937 b = pop_pair(); | |
| 1938 a = pop_pair(); | |
| 1939 c = _gvn.transform( new (C, 3) MulLNode(a,b) ); | |
| 1940 push_pair(c); | |
| 1941 break; | |
| 1942 | |
| 1943 case Bytecodes::_lrem: | |
| 1944 // Must keep both values on the expression-stack during null-check | |
| 1945 assert(peek(0) == top(), "long word order"); | |
| 1946 do_null_check(peek(1), T_LONG); | |
| 1947 // Compile-time detect of null-exception? | |
| 1948 if (stopped()) return; | |
| 1949 b = pop_pair(); | |
| 1950 a = pop_pair(); | |
| 1951 c = _gvn.transform( new (C, 3) ModLNode(control(),a,b) ); | |
| 1952 push_pair(c); | |
| 1953 break; | |
| 1954 | |
| 1955 case Bytecodes::_ldiv: | |
| 1956 // Must keep both values on the expression-stack during null-check | |
| 1957 assert(peek(0) == top(), "long word order"); | |
| 1958 do_null_check(peek(1), T_LONG); | |
| 1959 // Compile-time detect of null-exception? | |
| 1960 if (stopped()) return; | |
| 1961 b = pop_pair(); | |
| 1962 a = pop_pair(); | |
| 1963 c = _gvn.transform( new (C, 3) DivLNode(control(),a,b) ); | |
| 1964 push_pair(c); | |
| 1965 break; | |
| 1966 | |
| 1967 case Bytecodes::_ladd: | |
| 1968 b = pop_pair(); | |
| 1969 a = pop_pair(); | |
| 1970 c = _gvn.transform( new (C, 3) AddLNode(a,b) ); | |
| 1971 push_pair(c); | |
| 1972 break; | |
| 1973 case Bytecodes::_lsub: | |
| 1974 b = pop_pair(); | |
| 1975 a = pop_pair(); | |
| 1976 c = _gvn.transform( new (C, 3) SubLNode(a,b) ); | |
| 1977 push_pair(c); | |
| 1978 break; | |
| 1979 case Bytecodes::_lcmp: | |
| 1980 // Safepoints are now inserted _before_ branches. The long-compare | |
| 1981 // bytecode painfully produces a 3-way value (-1,0,+1) which requires a | |
| 1982 // slew of control flow. These are usually followed by a CmpI vs zero and | |
| 1983 // a branch; this pattern then optimizes to the obvious long-compare and | |
| 1984 // branch. However, if the branch is backwards there's a Safepoint | |
| 1985 // inserted. The inserted Safepoint captures the JVM state at the | |
| 1986 // pre-branch point, i.e. it captures the 3-way value. Thus if a | |
| 1987 // long-compare is used to control a loop the debug info will force | |
| 1988 // computation of the 3-way value, even though the generated code uses a | |
| 1989 // long-compare and branch. We try to rectify the situation by inserting | |
| 1990 // a SafePoint here and have it dominate and kill the safepoint added at a | |
| 1991 // following backwards branch. At this point the JVM state merely holds 2 | |
| 1992 // longs but not the 3-way value. | |
| 1993 if( UseLoopSafepoints ) { | |
| 1994 switch( iter().next_bc() ) { | |
| 1995 case Bytecodes::_ifgt: | |
| 1996 case Bytecodes::_iflt: | |
| 1997 case Bytecodes::_ifge: | |
| 1998 case Bytecodes::_ifle: | |
| 1999 case Bytecodes::_ifne: | |
| 2000 case Bytecodes::_ifeq: | |
| 2001 // If this is a backwards branch in the bytecodes, add Safepoint | |
| 2002 maybe_add_safepoint(iter().next_get_dest()); | |
| 2003 } | |
| 2004 } | |
| 2005 b = pop_pair(); | |
| 2006 a = pop_pair(); | |
| 2007 c = _gvn.transform( new (C, 3) CmpL3Node( a, b )); | |
| 2008 push(c); | |
| 2009 break; | |
| 2010 | |
| 2011 case Bytecodes::_lneg: | |
| 2012 a = pop_pair(); | |
| 2013 b = _gvn.transform( new (C, 3) SubLNode(longcon(0),a)); | |
| 2014 push_pair(b); | |
| 2015 break; | |
| 2016 case Bytecodes::_l2i: | |
| 2017 a = pop_pair(); | |
| 2018 push( _gvn.transform( new (C, 2) ConvL2INode(a))); | |
| 2019 break; | |
| 2020 case Bytecodes::_i2l: | |
| 2021 a = pop(); | |
| 2022 b = _gvn.transform( new (C, 2) ConvI2LNode(a)); | |
| 2023 push_pair(b); | |
| 2024 break; | |
| 2025 case Bytecodes::_i2b: | |
| 2026 // Sign extend | |
| 2027 a = pop(); | |
| 2028 a = _gvn.transform( new (C, 3) LShiftINode(a,_gvn.intcon(24)) ); | |
| 2029 a = _gvn.transform( new (C, 3) RShiftINode(a,_gvn.intcon(24)) ); | |
| 2030 push( a ); | |
| 2031 break; | |
| 2032 case Bytecodes::_i2s: | |
| 2033 a = pop(); | |
| 2034 a = _gvn.transform( new (C, 3) LShiftINode(a,_gvn.intcon(16)) ); | |
| 2035 a = _gvn.transform( new (C, 3) RShiftINode(a,_gvn.intcon(16)) ); | |
| 2036 push( a ); | |
| 2037 break; | |
| 2038 case Bytecodes::_i2c: | |
| 2039 a = pop(); | |
| 2040 push( _gvn.transform( new (C, 3) AndINode(a,_gvn.intcon(0xFFFF)) ) ); | |
| 2041 break; | |
| 2042 | |
| 2043 case Bytecodes::_i2f: | |
| 2044 a = pop(); | |
| 2045 b = _gvn.transform( new (C, 2) ConvI2FNode(a) ) ; | |
| 2046 c = precision_rounding(b); | |
| 2047 push (b); | |
| 2048 break; | |
| 2049 | |
| 2050 case Bytecodes::_i2d: | |
| 2051 a = pop(); | |
| 2052 b = _gvn.transform( new (C, 2) ConvI2DNode(a)); | |
| 2053 push_pair(b); | |
| 2054 break; | |
| 2055 | |
| 2056 case Bytecodes::_iinc: // Increment local | |
| 2057 i = iter().get_index(); // Get local index | |
| 2058 set_local( i, _gvn.transform( new (C, 3) AddINode( _gvn.intcon(iter().get_iinc_con()), local(i) ) ) ); | |
| 2059 break; | |
| 2060 | |
| 2061 // Exit points of synchronized methods must have an unlock node | |
| 2062 case Bytecodes::_return: | |
| 2063 return_current(NULL); | |
| 2064 break; | |
| 2065 | |
| 2066 case Bytecodes::_ireturn: | |
| 2067 case Bytecodes::_areturn: | |
| 2068 case Bytecodes::_freturn: | |
| 2069 return_current(pop()); | |
| 2070 break; | |
| 2071 case Bytecodes::_lreturn: | |
| 2072 return_current(pop_pair()); | |
| 2073 break; | |
| 2074 case Bytecodes::_dreturn: | |
| 2075 return_current(pop_pair()); | |
| 2076 break; | |
| 2077 | |
| 2078 case Bytecodes::_athrow: | |
| 2079 // null exception oop throws NULL pointer exception | |
| 2080 do_null_check(peek(), T_OBJECT); | |
| 2081 if (stopped()) return; | |
| 2082 // Hook the thrown exception directly to subsequent handlers. | |
| 2083 if (BailoutToInterpreterForThrows) { | |
| 2084 // Keep method interpreted from now on. | |
| 2085 uncommon_trap(Deoptimization::Reason_unhandled, | |
| 2086 Deoptimization::Action_make_not_compilable); | |
| 2087 return; | |
| 2088 } | |
|
1213
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2089 if (env()->jvmti_can_post_on_exceptions()) { |
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2090 // check if we must post exception events, take uncommon trap if so (with must_throw = false) |
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2091 uncommon_trap_if_should_post_on_exceptions(Deoptimization::Reason_unhandled, false); |
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2092 } |
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2093 // Here if either can_post_on_exceptions or should_post_on_exceptions is false |
| 0 | 2094 add_exception_state(make_exception_state(peek())); |
| 2095 break; | |
| 2096 | |
| 2097 case Bytecodes::_goto: // fall through | |
| 2098 case Bytecodes::_goto_w: { | |
| 2099 int target_bci = (bc() == Bytecodes::_goto) ? iter().get_dest() : iter().get_far_dest(); | |
| 2100 | |
| 2101 // If this is a backwards branch in the bytecodes, add Safepoint | |
| 2102 maybe_add_safepoint(target_bci); | |
| 2103 | |
| 2104 // Update method data | |
| 2105 profile_taken_branch(target_bci); | |
| 2106 | |
| 1172 | 2107 // Add loop predicate if it goes to a loop |
| 2108 if (should_add_predicate(target_bci)){ | |
| 2109 add_predicate(); | |
| 2110 } | |
| 0 | 2111 // Merge the current control into the target basic block |
| 2112 merge(target_bci); | |
| 2113 | |
| 2114 // See if we can get some profile data and hand it off to the next block | |
| 2115 Block *target_block = block()->successor_for_bci(target_bci); | |
| 2116 if (target_block->pred_count() != 1) break; | |
| 2117 ciMethodData* methodData = method()->method_data(); | |
| 2118 if (!methodData->is_mature()) break; | |
| 2119 ciProfileData* data = methodData->bci_to_data(bci()); | |
| 2120 assert( data->is_JumpData(), "" ); | |
| 2121 int taken = ((ciJumpData*)data)->taken(); | |
| 2122 taken = method()->scale_count(taken); | |
| 2123 target_block->set_count(taken); | |
| 2124 break; | |
| 2125 } | |
| 2126 | |
|
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2127 case Bytecodes::_ifnull: btest = BoolTest::eq; goto handle_if_null; |
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2128 case Bytecodes::_ifnonnull: btest = BoolTest::ne; goto handle_if_null; |
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2129 handle_if_null: |
|
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2130 // If this is a backwards branch in the bytecodes, add Safepoint |
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2131 maybe_add_safepoint(iter().get_dest()); |
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2132 a = null(); |
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2133 b = pop(); |
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2134 c = _gvn.transform( new (C, 3) CmpPNode(b, a) ); |
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2135 do_ifnull(btest, c); |
| 0 | 2136 break; |
| 2137 | |
| 2138 case Bytecodes::_if_acmpeq: btest = BoolTest::eq; goto handle_if_acmp; | |
| 2139 case Bytecodes::_if_acmpne: btest = BoolTest::ne; goto handle_if_acmp; | |
| 2140 handle_if_acmp: | |
|
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2141 // If this is a backwards branch in the bytecodes, add Safepoint |
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2142 maybe_add_safepoint(iter().get_dest()); |
| 0 | 2143 a = pop(); |
| 2144 b = pop(); | |
| 2145 c = _gvn.transform( new (C, 3) CmpPNode(b, a) ); | |
| 2146 do_if(btest, c); | |
| 2147 break; | |
| 2148 | |
| 2149 case Bytecodes::_ifeq: btest = BoolTest::eq; goto handle_ifxx; | |
| 2150 case Bytecodes::_ifne: btest = BoolTest::ne; goto handle_ifxx; | |
| 2151 case Bytecodes::_iflt: btest = BoolTest::lt; goto handle_ifxx; | |
| 2152 case Bytecodes::_ifle: btest = BoolTest::le; goto handle_ifxx; | |
| 2153 case Bytecodes::_ifgt: btest = BoolTest::gt; goto handle_ifxx; | |
| 2154 case Bytecodes::_ifge: btest = BoolTest::ge; goto handle_ifxx; | |
| 2155 handle_ifxx: | |
|
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2156 // If this is a backwards branch in the bytecodes, add Safepoint |
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2157 maybe_add_safepoint(iter().get_dest()); |
| 0 | 2158 a = _gvn.intcon(0); |
| 2159 b = pop(); | |
| 2160 c = _gvn.transform( new (C, 3) CmpINode(b, a) ); | |
| 2161 do_if(btest, c); | |
| 2162 break; | |
| 2163 | |
| 2164 case Bytecodes::_if_icmpeq: btest = BoolTest::eq; goto handle_if_icmp; | |
| 2165 case Bytecodes::_if_icmpne: btest = BoolTest::ne; goto handle_if_icmp; | |
| 2166 case Bytecodes::_if_icmplt: btest = BoolTest::lt; goto handle_if_icmp; | |
| 2167 case Bytecodes::_if_icmple: btest = BoolTest::le; goto handle_if_icmp; | |
| 2168 case Bytecodes::_if_icmpgt: btest = BoolTest::gt; goto handle_if_icmp; | |
| 2169 case Bytecodes::_if_icmpge: btest = BoolTest::ge; goto handle_if_icmp; | |
| 2170 handle_if_icmp: | |
|
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2171 // If this is a backwards branch in the bytecodes, add Safepoint |
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2172 maybe_add_safepoint(iter().get_dest()); |
| 0 | 2173 a = pop(); |
| 2174 b = pop(); | |
| 2175 c = _gvn.transform( new (C, 3) CmpINode( b, a ) ); | |
| 2176 do_if(btest, c); | |
| 2177 break; | |
| 2178 | |
| 2179 case Bytecodes::_tableswitch: | |
| 2180 do_tableswitch(); | |
| 2181 break; | |
| 2182 | |
| 2183 case Bytecodes::_lookupswitch: | |
| 2184 do_lookupswitch(); | |
| 2185 break; | |
| 2186 | |
| 2187 case Bytecodes::_invokestatic: | |
|
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2188 case Bytecodes::_invokedynamic: |
| 0 | 2189 case Bytecodes::_invokespecial: |
| 2190 case Bytecodes::_invokevirtual: | |
| 2191 case Bytecodes::_invokeinterface: | |
| 2192 do_call(); | |
| 2193 break; | |
| 2194 case Bytecodes::_checkcast: | |
| 2195 do_checkcast(); | |
| 2196 break; | |
| 2197 case Bytecodes::_instanceof: | |
| 2198 do_instanceof(); | |
| 2199 break; | |
| 2200 case Bytecodes::_anewarray: | |
| 2201 do_anewarray(); | |
| 2202 break; | |
| 2203 case Bytecodes::_newarray: | |
| 2204 do_newarray((BasicType)iter().get_index()); | |
| 2205 break; | |
| 2206 case Bytecodes::_multianewarray: | |
| 2207 do_multianewarray(); | |
| 2208 break; | |
| 2209 case Bytecodes::_new: | |
| 2210 do_new(); | |
| 2211 break; | |
| 2212 | |
| 2213 case Bytecodes::_jsr: | |
| 2214 case Bytecodes::_jsr_w: | |
| 2215 do_jsr(); | |
| 2216 break; | |
| 2217 | |
| 2218 case Bytecodes::_ret: | |
| 2219 do_ret(); | |
| 2220 break; | |
| 2221 | |
| 2222 | |
| 2223 case Bytecodes::_monitorenter: | |
| 2224 do_monitor_enter(); | |
| 2225 break; | |
| 2226 | |
| 2227 case Bytecodes::_monitorexit: | |
| 2228 do_monitor_exit(); | |
| 2229 break; | |
| 2230 | |
| 2231 case Bytecodes::_breakpoint: | |
| 2232 // Breakpoint set concurrently to compile | |
| 2233 // %%% use an uncommon trap? | |
| 2234 C->record_failure("breakpoint in method"); | |
| 2235 return; | |
| 2236 | |
| 2237 default: | |
| 2238 #ifndef PRODUCT | |
| 2239 map()->dump(99); | |
| 2240 #endif | |
| 2241 tty->print("\nUnhandled bytecode %s\n", Bytecodes::name(bc()) ); | |
| 2242 ShouldNotReachHere(); | |
| 2243 } | |
| 2244 | |
| 2245 #ifndef PRODUCT | |
| 2246 IdealGraphPrinter *printer = IdealGraphPrinter::printer(); | |
| 2247 if(printer) { | |
| 2248 char buffer[256]; | |
| 2249 sprintf(buffer, "Bytecode %d: %s", bci(), Bytecodes::name(bc())); | |
| 2250 bool old = printer->traverse_outs(); | |
| 2251 printer->set_traverse_outs(true); | |
| 222 | 2252 printer->print_method(C, buffer, 4); |
| 0 | 2253 printer->set_traverse_outs(old); |
| 2254 } | |
| 2255 #endif | |
| 2256 } |