Mercurial > hg > truffle
annotate src/share/vm/opto/parse2.cpp @ 14714:b602356a9cfc
additional canonicalizers for accesses and value nodes (improves number of implicit null checks)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 20 Mar 2014 17:15:36 +0100 |
parents | 45467c53f178 |
children | 4ca6dc0799b6 78bbf4d43a14 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "ci/ciMethodData.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "classfile/vmSymbols.hpp" | |
29 #include "compiler/compileLog.hpp" | |
30 #include "interpreter/linkResolver.hpp" | |
31 #include "memory/universe.inline.hpp" | |
32 #include "opto/addnode.hpp" | |
33 #include "opto/divnode.hpp" | |
34 #include "opto/idealGraphPrinter.hpp" | |
35 #include "opto/matcher.hpp" | |
36 #include "opto/memnode.hpp" | |
37 #include "opto/mulnode.hpp" | |
38 #include "opto/parse.hpp" | |
39 #include "opto/runtime.hpp" | |
40 #include "runtime/deoptimization.hpp" | |
41 #include "runtime/sharedRuntime.hpp" | |
0 | 42 |
43 extern int explicit_null_checks_inserted, | |
44 explicit_null_checks_elided; | |
45 | |
46 //---------------------------------array_load---------------------------------- | |
47 void Parse::array_load(BasicType elem_type) { | |
48 const Type* elem = Type::TOP; | |
49 Node* adr = array_addressing(elem_type, 0, &elem); | |
605 | 50 if (stopped()) return; // guaranteed null or range check |
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51 dec_sp(2); // Pop array and index |
0 | 52 const TypeAryPtr* adr_type = TypeAryPtr::get_array_body_type(elem_type); |
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53 Node* ld = make_load(control(), adr, elem, elem_type, adr_type, MemNode::unordered); |
0 | 54 push(ld); |
55 } | |
56 | |
57 | |
58 //--------------------------------array_store---------------------------------- | |
59 void Parse::array_store(BasicType elem_type) { | |
60 Node* adr = array_addressing(elem_type, 1); | |
605 | 61 if (stopped()) return; // guaranteed null or range check |
0 | 62 Node* val = pop(); |
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63 dec_sp(2); // Pop array and index |
0 | 64 const TypeAryPtr* adr_type = TypeAryPtr::get_array_body_type(elem_type); |
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65 store_to_memory(control(), adr, val, elem_type, adr_type, StoreNode::release_if_reference(elem_type)); |
0 | 66 } |
67 | |
68 | |
69 //------------------------------array_addressing------------------------------- | |
70 // Pull array and index from the stack. Compute pointer-to-element. | |
71 Node* Parse::array_addressing(BasicType type, int vals, const Type* *result2) { | |
72 Node *idx = peek(0+vals); // Get from stack without popping | |
73 Node *ary = peek(1+vals); // in case of exception | |
74 | |
75 // Null check the array base, with correct stack contents | |
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76 ary = null_check(ary, T_ARRAY); |
0 | 77 // Compile-time detect of null-exception? |
78 if (stopped()) return top(); | |
79 | |
80 const TypeAryPtr* arytype = _gvn.type(ary)->is_aryptr(); | |
81 const TypeInt* sizetype = arytype->size(); | |
82 const Type* elemtype = arytype->elem(); | |
83 | |
84 if (UseUniqueSubclasses && result2 != NULL) { | |
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85 const Type* el = elemtype->make_ptr(); |
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86 if (el && el->isa_instptr()) { |
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87 const TypeInstPtr* toop = el->is_instptr(); |
0 | 88 if (toop->klass()->as_instance_klass()->unique_concrete_subklass()) { |
89 // If we load from "AbstractClass[]" we must see "ConcreteSubClass". | |
90 const Type* subklass = Type::get_const_type(toop->klass()); | |
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91 elemtype = subklass->join_speculative(el); |
0 | 92 } |
93 } | |
94 } | |
95 | |
96 // Check for big class initializers with all constant offsets | |
97 // feeding into a known-size array. | |
98 const TypeInt* idxtype = _gvn.type(idx)->is_int(); | |
99 // See if the highest idx value is less than the lowest array bound, | |
100 // and if the idx value cannot be negative: | |
101 bool need_range_check = true; | |
102 if (idxtype->_hi < sizetype->_lo && idxtype->_lo >= 0) { | |
103 need_range_check = false; | |
104 if (C->log() != NULL) C->log()->elem("observe that='!need_range_check'"); | |
105 } | |
106 | |
8862 | 107 ciKlass * arytype_klass = arytype->klass(); |
108 if ((arytype_klass != NULL) && (!arytype_klass->is_loaded())) { | |
0 | 109 // Only fails for some -Xcomp runs |
110 // The class is unloaded. We have to run this bytecode in the interpreter. | |
111 uncommon_trap(Deoptimization::Reason_unloaded, | |
112 Deoptimization::Action_reinterpret, | |
113 arytype->klass(), "!loaded array"); | |
114 return top(); | |
115 } | |
116 | |
117 // Do the range check | |
118 if (GenerateRangeChecks && need_range_check) { | |
129
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119 Node* tst; |
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120 if (sizetype->_hi <= 0) { |
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121 // The greatest array bound is negative, so we can conclude that we're |
129
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122 // compiling unreachable code, but the unsigned compare trick used below |
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123 // only works with non-negative lengths. Instead, hack "tst" to be zero so |
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124 // the uncommon_trap path will always be taken. |
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125 tst = _gvn.intcon(0); |
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126 } else { |
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127 // Range is constant in array-oop, so we can use the original state of mem |
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128 Node* len = load_array_length(ary); |
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129 |
129
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130 // Test length vs index (standard trick using unsigned compare) |
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131 Node* chk = _gvn.transform( new (C) CmpUNode(idx, len) ); |
129
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132 BoolTest::mask btest = BoolTest::lt; |
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133 tst = _gvn.transform( new (C) BoolNode(chk, btest) ); |
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134 } |
0 | 135 // Branch to failure if out of bounds |
136 { BuildCutout unless(this, tst, PROB_MAX); | |
137 if (C->allow_range_check_smearing()) { | |
138 // Do not use builtin_throw, since range checks are sometimes | |
139 // made more stringent by an optimistic transformation. | |
140 // This creates "tentative" range checks at this point, | |
141 // which are not guaranteed to throw exceptions. | |
142 // See IfNode::Ideal, is_range_check, adjust_check. | |
143 uncommon_trap(Deoptimization::Reason_range_check, | |
144 Deoptimization::Action_make_not_entrant, | |
145 NULL, "range_check"); | |
146 } else { | |
147 // If we have already recompiled with the range-check-widening | |
148 // heroic optimization turned off, then we must really be throwing | |
149 // range check exceptions. | |
150 builtin_throw(Deoptimization::Reason_range_check, idx); | |
151 } | |
152 } | |
153 } | |
154 // Check for always knowing you are throwing a range-check exception | |
155 if (stopped()) return top(); | |
156 | |
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157 Node* ptr = array_element_address(ary, idx, type, sizetype); |
0 | 158 |
159 if (result2 != NULL) *result2 = elemtype; | |
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160 |
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161 assert(ptr != top(), "top should go hand-in-hand with stopped"); |
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162 |
0 | 163 return ptr; |
164 } | |
165 | |
166 | |
167 // returns IfNode | |
168 IfNode* Parse::jump_if_fork_int(Node* a, Node* b, BoolTest::mask mask) { | |
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169 Node *cmp = _gvn.transform( new (C) CmpINode( a, b)); // two cases: shiftcount > 32 and shiftcount <= 32 |
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170 Node *tst = _gvn.transform( new (C) BoolNode( cmp, mask)); |
0 | 171 IfNode *iff = create_and_map_if( control(), tst, ((mask == BoolTest::eq) ? PROB_STATIC_INFREQUENT : PROB_FAIR), COUNT_UNKNOWN ); |
172 return iff; | |
173 } | |
174 | |
175 // return Region node | |
176 Node* Parse::jump_if_join(Node* iffalse, Node* iftrue) { | |
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177 Node *region = new (C) RegionNode(3); // 2 results |
0 | 178 record_for_igvn(region); |
179 region->init_req(1, iffalse); | |
180 region->init_req(2, iftrue ); | |
181 _gvn.set_type(region, Type::CONTROL); | |
182 region = _gvn.transform(region); | |
183 set_control (region); | |
184 return region; | |
185 } | |
186 | |
187 | |
188 //------------------------------helper for tableswitch------------------------- | |
189 void Parse::jump_if_true_fork(IfNode *iff, int dest_bci_if_true, int prof_table_index) { | |
190 // True branch, use existing map info | |
191 { PreserveJVMState pjvms(this); | |
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192 Node *iftrue = _gvn.transform( new (C) IfTrueNode (iff) ); |
0 | 193 set_control( iftrue ); |
194 profile_switch_case(prof_table_index); | |
195 merge_new_path(dest_bci_if_true); | |
196 } | |
197 | |
198 // False branch | |
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199 Node *iffalse = _gvn.transform( new (C) IfFalseNode(iff) ); |
0 | 200 set_control( iffalse ); |
201 } | |
202 | |
203 void Parse::jump_if_false_fork(IfNode *iff, int dest_bci_if_true, int prof_table_index) { | |
204 // True branch, use existing map info | |
205 { PreserveJVMState pjvms(this); | |
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206 Node *iffalse = _gvn.transform( new (C) IfFalseNode (iff) ); |
0 | 207 set_control( iffalse ); |
208 profile_switch_case(prof_table_index); | |
209 merge_new_path(dest_bci_if_true); | |
210 } | |
211 | |
212 // False branch | |
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213 Node *iftrue = _gvn.transform( new (C) IfTrueNode(iff) ); |
0 | 214 set_control( iftrue ); |
215 } | |
216 | |
217 void Parse::jump_if_always_fork(int dest_bci, int prof_table_index) { | |
218 // False branch, use existing map and control() | |
219 profile_switch_case(prof_table_index); | |
220 merge_new_path(dest_bci); | |
221 } | |
222 | |
223 | |
224 extern "C" { | |
225 static int jint_cmp(const void *i, const void *j) { | |
226 int a = *(jint *)i; | |
227 int b = *(jint *)j; | |
228 return a > b ? 1 : a < b ? -1 : 0; | |
229 } | |
230 } | |
231 | |
232 | |
233 // Default value for methodData switch indexing. Must be a negative value to avoid | |
234 // conflict with any legal switch index. | |
235 #define NullTableIndex -1 | |
236 | |
237 class SwitchRange : public StackObj { | |
238 // a range of integers coupled with a bci destination | |
239 jint _lo; // inclusive lower limit | |
240 jint _hi; // inclusive upper limit | |
241 int _dest; | |
242 int _table_index; // index into method data table | |
243 | |
244 public: | |
245 jint lo() const { return _lo; } | |
246 jint hi() const { return _hi; } | |
247 int dest() const { return _dest; } | |
248 int table_index() const { return _table_index; } | |
249 bool is_singleton() const { return _lo == _hi; } | |
250 | |
251 void setRange(jint lo, jint hi, int dest, int table_index) { | |
252 assert(lo <= hi, "must be a non-empty range"); | |
253 _lo = lo, _hi = hi; _dest = dest; _table_index = table_index; | |
254 } | |
255 bool adjoinRange(jint lo, jint hi, int dest, int table_index) { | |
256 assert(lo <= hi, "must be a non-empty range"); | |
257 if (lo == _hi+1 && dest == _dest && table_index == _table_index) { | |
258 _hi = hi; | |
259 return true; | |
260 } | |
261 return false; | |
262 } | |
263 | |
264 void set (jint value, int dest, int table_index) { | |
265 setRange(value, value, dest, table_index); | |
266 } | |
267 bool adjoin(jint value, int dest, int table_index) { | |
268 return adjoinRange(value, value, dest, table_index); | |
269 } | |
270 | |
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271 void print() { |
0 | 272 if (is_singleton()) |
273 tty->print(" {%d}=>%d", lo(), dest()); | |
274 else if (lo() == min_jint) | |
275 tty->print(" {..%d}=>%d", hi(), dest()); | |
276 else if (hi() == max_jint) | |
277 tty->print(" {%d..}=>%d", lo(), dest()); | |
278 else | |
279 tty->print(" {%d..%d}=>%d", lo(), hi(), dest()); | |
280 } | |
281 }; | |
282 | |
283 | |
284 //-------------------------------do_tableswitch-------------------------------- | |
285 void Parse::do_tableswitch() { | |
286 Node* lookup = pop(); | |
287 | |
288 // Get information about tableswitch | |
289 int default_dest = iter().get_dest_table(0); | |
290 int lo_index = iter().get_int_table(1); | |
291 int hi_index = iter().get_int_table(2); | |
292 int len = hi_index - lo_index + 1; | |
293 | |
294 if (len < 1) { | |
295 // If this is a backward branch, add safepoint | |
296 maybe_add_safepoint(default_dest); | |
297 merge(default_dest); | |
298 return; | |
299 } | |
300 | |
301 // generate decision tree, using trichotomy when possible | |
302 int rnum = len+2; | |
303 bool makes_backward_branch = false; | |
304 SwitchRange* ranges = NEW_RESOURCE_ARRAY(SwitchRange, rnum); | |
305 int rp = -1; | |
306 if (lo_index != min_jint) { | |
307 ranges[++rp].setRange(min_jint, lo_index-1, default_dest, NullTableIndex); | |
308 } | |
309 for (int j = 0; j < len; j++) { | |
310 jint match_int = lo_index+j; | |
311 int dest = iter().get_dest_table(j+3); | |
312 makes_backward_branch |= (dest <= bci()); | |
313 int table_index = method_data_update() ? j : NullTableIndex; | |
314 if (rp < 0 || !ranges[rp].adjoin(match_int, dest, table_index)) { | |
315 ranges[++rp].set(match_int, dest, table_index); | |
316 } | |
317 } | |
318 jint highest = lo_index+(len-1); | |
319 assert(ranges[rp].hi() == highest, ""); | |
320 if (highest != max_jint | |
321 && !ranges[rp].adjoinRange(highest+1, max_jint, default_dest, NullTableIndex)) { | |
322 ranges[++rp].setRange(highest+1, max_jint, default_dest, NullTableIndex); | |
323 } | |
324 assert(rp < len+2, "not too many ranges"); | |
325 | |
326 // Safepoint in case if backward branch observed | |
327 if( makes_backward_branch && UseLoopSafepoints ) | |
328 add_safepoint(); | |
329 | |
330 jump_switch_ranges(lookup, &ranges[0], &ranges[rp]); | |
331 } | |
332 | |
333 | |
334 //------------------------------do_lookupswitch-------------------------------- | |
335 void Parse::do_lookupswitch() { | |
336 Node *lookup = pop(); // lookup value | |
337 // Get information about lookupswitch | |
338 int default_dest = iter().get_dest_table(0); | |
339 int len = iter().get_int_table(1); | |
340 | |
341 if (len < 1) { // If this is a backward branch, add safepoint | |
342 maybe_add_safepoint(default_dest); | |
343 merge(default_dest); | |
344 return; | |
345 } | |
346 | |
347 // generate decision tree, using trichotomy when possible | |
348 jint* table = NEW_RESOURCE_ARRAY(jint, len*2); | |
349 { | |
350 for( int j = 0; j < len; j++ ) { | |
351 table[j+j+0] = iter().get_int_table(2+j+j); | |
352 table[j+j+1] = iter().get_dest_table(2+j+j+1); | |
353 } | |
354 qsort( table, len, 2*sizeof(table[0]), jint_cmp ); | |
355 } | |
356 | |
357 int rnum = len*2+1; | |
358 bool makes_backward_branch = false; | |
359 SwitchRange* ranges = NEW_RESOURCE_ARRAY(SwitchRange, rnum); | |
360 int rp = -1; | |
361 for( int j = 0; j < len; j++ ) { | |
362 jint match_int = table[j+j+0]; | |
363 int dest = table[j+j+1]; | |
364 int next_lo = rp < 0 ? min_jint : ranges[rp].hi()+1; | |
365 int table_index = method_data_update() ? j : NullTableIndex; | |
366 makes_backward_branch |= (dest <= bci()); | |
367 if( match_int != next_lo ) { | |
368 ranges[++rp].setRange(next_lo, match_int-1, default_dest, NullTableIndex); | |
369 } | |
370 if( rp < 0 || !ranges[rp].adjoin(match_int, dest, table_index) ) { | |
371 ranges[++rp].set(match_int, dest, table_index); | |
372 } | |
373 } | |
374 jint highest = table[2*(len-1)]; | |
375 assert(ranges[rp].hi() == highest, ""); | |
376 if( highest != max_jint | |
377 && !ranges[rp].adjoinRange(highest+1, max_jint, default_dest, NullTableIndex) ) { | |
378 ranges[++rp].setRange(highest+1, max_jint, default_dest, NullTableIndex); | |
379 } | |
380 assert(rp < rnum, "not too many ranges"); | |
381 | |
382 // Safepoint in case backward branch observed | |
383 if( makes_backward_branch && UseLoopSafepoints ) | |
384 add_safepoint(); | |
385 | |
386 jump_switch_ranges(lookup, &ranges[0], &ranges[rp]); | |
387 } | |
388 | |
389 //----------------------------create_jump_tables------------------------------- | |
390 bool Parse::create_jump_tables(Node* key_val, SwitchRange* lo, SwitchRange* hi) { | |
391 // Are jumptables enabled | |
392 if (!UseJumpTables) return false; | |
393 | |
394 // Are jumptables supported | |
395 if (!Matcher::has_match_rule(Op_Jump)) return false; | |
396 | |
397 // Don't make jump table if profiling | |
398 if (method_data_update()) return false; | |
399 | |
400 // Decide if a guard is needed to lop off big ranges at either (or | |
401 // both) end(s) of the input set. We'll call this the default target | |
402 // even though we can't be sure that it is the true "default". | |
403 | |
404 bool needs_guard = false; | |
405 int default_dest; | |
406 int64 total_outlier_size = 0; | |
407 int64 hi_size = ((int64)hi->hi()) - ((int64)hi->lo()) + 1; | |
408 int64 lo_size = ((int64)lo->hi()) - ((int64)lo->lo()) + 1; | |
409 | |
410 if (lo->dest() == hi->dest()) { | |
411 total_outlier_size = hi_size + lo_size; | |
412 default_dest = lo->dest(); | |
413 } else if (lo_size > hi_size) { | |
414 total_outlier_size = lo_size; | |
415 default_dest = lo->dest(); | |
416 } else { | |
417 total_outlier_size = hi_size; | |
418 default_dest = hi->dest(); | |
419 } | |
420 | |
421 // If a guard test will eliminate very sparse end ranges, then | |
422 // it is worth the cost of an extra jump. | |
423 if (total_outlier_size > (MaxJumpTableSparseness * 4)) { | |
424 needs_guard = true; | |
425 if (default_dest == lo->dest()) lo++; | |
426 if (default_dest == hi->dest()) hi--; | |
427 } | |
428 | |
429 // Find the total number of cases and ranges | |
430 int64 num_cases = ((int64)hi->hi()) - ((int64)lo->lo()) + 1; | |
431 int num_range = hi - lo + 1; | |
432 | |
433 // Don't create table if: too large, too small, or too sparse. | |
434 if (num_cases < MinJumpTableSize || num_cases > MaxJumpTableSize) | |
435 return false; | |
436 if (num_cases > (MaxJumpTableSparseness * num_range)) | |
437 return false; | |
438 | |
439 // Normalize table lookups to zero | |
440 int lowval = lo->lo(); | |
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441 key_val = _gvn.transform( new (C) SubINode(key_val, _gvn.intcon(lowval)) ); |
0 | 442 |
443 // Generate a guard to protect against input keyvals that aren't | |
444 // in the switch domain. | |
445 if (needs_guard) { | |
446 Node* size = _gvn.intcon(num_cases); | |
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447 Node* cmp = _gvn.transform( new (C) CmpUNode(key_val, size) ); |
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448 Node* tst = _gvn.transform( new (C) BoolNode(cmp, BoolTest::ge) ); |
0 | 449 IfNode* iff = create_and_map_if( control(), tst, PROB_FAIR, COUNT_UNKNOWN); |
450 jump_if_true_fork(iff, default_dest, NullTableIndex); | |
451 } | |
452 | |
453 // Create an ideal node JumpTable that has projections | |
454 // of all possible ranges for a switch statement | |
455 // The key_val input must be converted to a pointer offset and scaled. | |
456 // Compare Parse::array_addressing above. | |
457 #ifdef _LP64 | |
458 // Clean the 32-bit int into a real 64-bit offset. | |
459 // Otherwise, the jint value 0 might turn into an offset of 0x0800000000. | |
460 const TypeLong* lkeytype = TypeLong::make(CONST64(0), num_cases-1, Type::WidenMin); | |
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461 key_val = _gvn.transform( new (C) ConvI2LNode(key_val, lkeytype) ); |
0 | 462 #endif |
463 // Shift the value by wordsize so we have an index into the table, rather | |
464 // than a switch value | |
465 Node *shiftWord = _gvn.MakeConX(wordSize); | |
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466 key_val = _gvn.transform( new (C) MulXNode( key_val, shiftWord)); |
0 | 467 |
468 // Create the JumpNode | |
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469 Node* jtn = _gvn.transform( new (C) JumpNode(control(), key_val, num_cases) ); |
0 | 470 |
471 // These are the switch destinations hanging off the jumpnode | |
472 int i = 0; | |
473 for (SwitchRange* r = lo; r <= hi; r++) { | |
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474 for (int64 j = r->lo(); j <= r->hi(); j++, i++) { |
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475 Node* input = _gvn.transform(new (C) JumpProjNode(jtn, i, r->dest(), (int)(j - lowval))); |
0 | 476 { |
477 PreserveJVMState pjvms(this); | |
478 set_control(input); | |
479 jump_if_always_fork(r->dest(), r->table_index()); | |
480 } | |
481 } | |
482 } | |
483 assert(i == num_cases, "miscount of cases"); | |
484 stop_and_kill_map(); // no more uses for this JVMS | |
485 return true; | |
486 } | |
487 | |
488 //----------------------------jump_switch_ranges------------------------------- | |
489 void Parse::jump_switch_ranges(Node* key_val, SwitchRange *lo, SwitchRange *hi, int switch_depth) { | |
490 Block* switch_block = block(); | |
491 | |
492 if (switch_depth == 0) { | |
493 // Do special processing for the top-level call. | |
494 assert(lo->lo() == min_jint, "initial range must exhaust Type::INT"); | |
495 assert(hi->hi() == max_jint, "initial range must exhaust Type::INT"); | |
496 | |
497 // Decrement pred-numbers for the unique set of nodes. | |
498 #ifdef ASSERT | |
499 // Ensure that the block's successors are a (duplicate-free) set. | |
500 int successors_counted = 0; // block occurrences in [hi..lo] | |
501 int unique_successors = switch_block->num_successors(); | |
502 for (int i = 0; i < unique_successors; i++) { | |
503 Block* target = switch_block->successor_at(i); | |
504 | |
505 // Check that the set of successors is the same in both places. | |
506 int successors_found = 0; | |
507 for (SwitchRange* p = lo; p <= hi; p++) { | |
508 if (p->dest() == target->start()) successors_found++; | |
509 } | |
510 assert(successors_found > 0, "successor must be known"); | |
511 successors_counted += successors_found; | |
512 } | |
513 assert(successors_counted == (hi-lo)+1, "no unexpected successors"); | |
514 #endif | |
515 | |
516 // Maybe prune the inputs, based on the type of key_val. | |
517 jint min_val = min_jint; | |
518 jint max_val = max_jint; | |
519 const TypeInt* ti = key_val->bottom_type()->isa_int(); | |
520 if (ti != NULL) { | |
521 min_val = ti->_lo; | |
522 max_val = ti->_hi; | |
523 assert(min_val <= max_val, "invalid int type"); | |
524 } | |
525 while (lo->hi() < min_val) lo++; | |
526 if (lo->lo() < min_val) lo->setRange(min_val, lo->hi(), lo->dest(), lo->table_index()); | |
527 while (hi->lo() > max_val) hi--; | |
528 if (hi->hi() > max_val) hi->setRange(hi->lo(), max_val, hi->dest(), hi->table_index()); | |
529 } | |
530 | |
531 #ifndef PRODUCT | |
532 if (switch_depth == 0) { | |
533 _max_switch_depth = 0; | |
534 _est_switch_depth = log2_intptr((hi-lo+1)-1)+1; | |
535 } | |
536 #endif | |
537 | |
538 assert(lo <= hi, "must be a non-empty set of ranges"); | |
539 if (lo == hi) { | |
540 jump_if_always_fork(lo->dest(), lo->table_index()); | |
541 } else { | |
542 assert(lo->hi() == (lo+1)->lo()-1, "contiguous ranges"); | |
543 assert(hi->lo() == (hi-1)->hi()+1, "contiguous ranges"); | |
544 | |
545 if (create_jump_tables(key_val, lo, hi)) return; | |
546 | |
547 int nr = hi - lo + 1; | |
548 | |
549 SwitchRange* mid = lo + nr/2; | |
550 // if there is an easy choice, pivot at a singleton: | |
551 if (nr > 3 && !mid->is_singleton() && (mid-1)->is_singleton()) mid--; | |
552 | |
553 assert(lo < mid && mid <= hi, "good pivot choice"); | |
554 assert(nr != 2 || mid == hi, "should pick higher of 2"); | |
555 assert(nr != 3 || mid == hi-1, "should pick middle of 3"); | |
556 | |
557 Node *test_val = _gvn.intcon(mid->lo()); | |
558 | |
559 if (mid->is_singleton()) { | |
560 IfNode *iff_ne = jump_if_fork_int(key_val, test_val, BoolTest::ne); | |
561 jump_if_false_fork(iff_ne, mid->dest(), mid->table_index()); | |
562 | |
563 // Special Case: If there are exactly three ranges, and the high | |
564 // and low range each go to the same place, omit the "gt" test, | |
565 // since it will not discriminate anything. | |
566 bool eq_test_only = (hi == lo+2 && hi->dest() == lo->dest()); | |
567 if (eq_test_only) { | |
568 assert(mid == hi-1, ""); | |
569 } | |
570 | |
571 // if there is a higher range, test for it and process it: | |
572 if (mid < hi && !eq_test_only) { | |
573 // two comparisons of same values--should enable 1 test for 2 branches | |
574 // Use BoolTest::le instead of BoolTest::gt | |
575 IfNode *iff_le = jump_if_fork_int(key_val, test_val, BoolTest::le); | |
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576 Node *iftrue = _gvn.transform( new (C) IfTrueNode(iff_le) ); |
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577 Node *iffalse = _gvn.transform( new (C) IfFalseNode(iff_le) ); |
0 | 578 { PreserveJVMState pjvms(this); |
579 set_control(iffalse); | |
580 jump_switch_ranges(key_val, mid+1, hi, switch_depth+1); | |
581 } | |
582 set_control(iftrue); | |
583 } | |
584 | |
585 } else { | |
586 // mid is a range, not a singleton, so treat mid..hi as a unit | |
587 IfNode *iff_ge = jump_if_fork_int(key_val, test_val, BoolTest::ge); | |
588 | |
589 // if there is a higher range, test for it and process it: | |
590 if (mid == hi) { | |
591 jump_if_true_fork(iff_ge, mid->dest(), mid->table_index()); | |
592 } else { | |
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593 Node *iftrue = _gvn.transform( new (C) IfTrueNode(iff_ge) ); |
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594 Node *iffalse = _gvn.transform( new (C) IfFalseNode(iff_ge) ); |
0 | 595 { PreserveJVMState pjvms(this); |
596 set_control(iftrue); | |
597 jump_switch_ranges(key_val, mid, hi, switch_depth+1); | |
598 } | |
599 set_control(iffalse); | |
600 } | |
601 } | |
602 | |
603 // in any case, process the lower range | |
604 jump_switch_ranges(key_val, lo, mid-1, switch_depth+1); | |
605 } | |
606 | |
607 // Decrease pred_count for each successor after all is done. | |
608 if (switch_depth == 0) { | |
609 int unique_successors = switch_block->num_successors(); | |
610 for (int i = 0; i < unique_successors; i++) { | |
611 Block* target = switch_block->successor_at(i); | |
612 // Throw away the pre-allocated path for each unique successor. | |
613 target->next_path_num(); | |
614 } | |
615 } | |
616 | |
617 #ifndef PRODUCT | |
618 _max_switch_depth = MAX2(switch_depth, _max_switch_depth); | |
619 if (TraceOptoParse && Verbose && WizardMode && switch_depth == 0) { | |
620 SwitchRange* r; | |
621 int nsing = 0; | |
622 for( r = lo; r <= hi; r++ ) { | |
623 if( r->is_singleton() ) nsing++; | |
624 } | |
625 tty->print(">>> "); | |
626 _method->print_short_name(); | |
627 tty->print_cr(" switch decision tree"); | |
628 tty->print_cr(" %d ranges (%d singletons), max_depth=%d, est_depth=%d", | |
629 hi-lo+1, nsing, _max_switch_depth, _est_switch_depth); | |
630 if (_max_switch_depth > _est_switch_depth) { | |
631 tty->print_cr("******** BAD SWITCH DEPTH ********"); | |
632 } | |
633 tty->print(" "); | |
634 for( r = lo; r <= hi; r++ ) { | |
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635 r->print(); |
0 | 636 } |
637 tty->print_cr(""); | |
638 } | |
639 #endif | |
640 } | |
641 | |
642 void Parse::modf() { | |
643 Node *f2 = pop(); | |
644 Node *f1 = pop(); | |
645 Node* c = make_runtime_call(RC_LEAF, OptoRuntime::modf_Type(), | |
646 CAST_FROM_FN_PTR(address, SharedRuntime::frem), | |
647 "frem", NULL, //no memory effects | |
648 f1, f2); | |
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649 Node* res = _gvn.transform(new (C) ProjNode(c, TypeFunc::Parms + 0)); |
0 | 650 |
651 push(res); | |
652 } | |
653 | |
654 void Parse::modd() { | |
655 Node *d2 = pop_pair(); | |
656 Node *d1 = pop_pair(); | |
657 Node* c = make_runtime_call(RC_LEAF, OptoRuntime::Math_DD_D_Type(), | |
658 CAST_FROM_FN_PTR(address, SharedRuntime::drem), | |
659 "drem", NULL, //no memory effects | |
660 d1, top(), d2, top()); | |
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661 Node* res_d = _gvn.transform(new (C) ProjNode(c, TypeFunc::Parms + 0)); |
0 | 662 |
663 #ifdef ASSERT | |
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664 Node* res_top = _gvn.transform(new (C) ProjNode(c, TypeFunc::Parms + 1)); |
0 | 665 assert(res_top == top(), "second value must be top"); |
666 #endif | |
667 | |
668 push_pair(res_d); | |
669 } | |
670 | |
671 void Parse::l2f() { | |
672 Node* f2 = pop(); | |
673 Node* f1 = pop(); | |
674 Node* c = make_runtime_call(RC_LEAF, OptoRuntime::l2f_Type(), | |
675 CAST_FROM_FN_PTR(address, SharedRuntime::l2f), | |
676 "l2f", NULL, //no memory effects | |
677 f1, f2); | |
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678 Node* res = _gvn.transform(new (C) ProjNode(c, TypeFunc::Parms + 0)); |
0 | 679 |
680 push(res); | |
681 } | |
682 | |
683 void Parse::do_irem() { | |
684 // Must keep both values on the expression-stack during null-check | |
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685 zero_check_int(peek()); |
0 | 686 // Compile-time detect of null-exception? |
687 if (stopped()) return; | |
688 | |
689 Node* b = pop(); | |
690 Node* a = pop(); | |
691 | |
692 const Type *t = _gvn.type(b); | |
693 if (t != Type::TOP) { | |
694 const TypeInt *ti = t->is_int(); | |
695 if (ti->is_con()) { | |
696 int divisor = ti->get_con(); | |
697 // check for positive power of 2 | |
698 if (divisor > 0 && | |
699 (divisor & ~(divisor-1)) == divisor) { | |
700 // yes ! | |
701 Node *mask = _gvn.intcon((divisor - 1)); | |
702 // Sigh, must handle negative dividends | |
703 Node *zero = _gvn.intcon(0); | |
704 IfNode *ifff = jump_if_fork_int(a, zero, BoolTest::lt); | |
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705 Node *iff = _gvn.transform( new (C) IfFalseNode(ifff) ); |
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706 Node *ift = _gvn.transform( new (C) IfTrueNode (ifff) ); |
0 | 707 Node *reg = jump_if_join(ift, iff); |
708 Node *phi = PhiNode::make(reg, NULL, TypeInt::INT); | |
709 // Negative path; negate/and/negate | |
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710 Node *neg = _gvn.transform( new (C) SubINode(zero, a) ); |
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711 Node *andn= _gvn.transform( new (C) AndINode(neg, mask) ); |
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712 Node *negn= _gvn.transform( new (C) SubINode(zero, andn) ); |
0 | 713 phi->init_req(1, negn); |
714 // Fast positive case | |
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715 Node *andx = _gvn.transform( new (C) AndINode(a, mask) ); |
0 | 716 phi->init_req(2, andx); |
717 // Push the merge | |
718 push( _gvn.transform(phi) ); | |
719 return; | |
720 } | |
721 } | |
722 } | |
723 // Default case | |
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724 push( _gvn.transform( new (C) ModINode(control(),a,b) ) ); |
0 | 725 } |
726 | |
727 // Handle jsr and jsr_w bytecode | |
728 void Parse::do_jsr() { | |
729 assert(bc() == Bytecodes::_jsr || bc() == Bytecodes::_jsr_w, "wrong bytecode"); | |
730 | |
731 // Store information about current state, tagged with new _jsr_bci | |
732 int return_bci = iter().next_bci(); | |
733 int jsr_bci = (bc() == Bytecodes::_jsr) ? iter().get_dest() : iter().get_far_dest(); | |
734 | |
735 // Update method data | |
736 profile_taken_branch(jsr_bci); | |
737 | |
738 // The way we do things now, there is only one successor block | |
739 // for the jsr, because the target code is cloned by ciTypeFlow. | |
740 Block* target = successor_for_bci(jsr_bci); | |
741 | |
742 // What got pushed? | |
743 const Type* ret_addr = target->peek(); | |
744 assert(ret_addr->singleton(), "must be a constant (cloned jsr body)"); | |
745 | |
746 // Effect on jsr on stack | |
747 push(_gvn.makecon(ret_addr)); | |
748 | |
749 // Flow to the jsr. | |
750 merge(jsr_bci); | |
751 } | |
752 | |
753 // Handle ret bytecode | |
754 void Parse::do_ret() { | |
755 // Find to whom we return. | |
756 assert(block()->num_successors() == 1, "a ret can only go one place now"); | |
757 Block* target = block()->successor_at(0); | |
758 assert(!target->is_ready(), "our arrival must be expected"); | |
759 profile_ret(target->flow()->start()); | |
760 int pnum = target->next_path_num(); | |
761 merge_common(target, pnum); | |
762 } | |
763 | |
764 //--------------------------dynamic_branch_prediction-------------------------- | |
765 // Try to gather dynamic branch prediction behavior. Return a probability | |
766 // of the branch being taken and set the "cnt" field. Returns a -1.0 | |
767 // if we need to use static prediction for some reason. | |
768 float Parse::dynamic_branch_prediction(float &cnt) { | |
769 ResourceMark rm; | |
770 | |
771 cnt = COUNT_UNKNOWN; | |
772 | |
773 // Use MethodData information if it is available | |
774 // FIXME: free the ProfileData structure | |
775 ciMethodData* methodData = method()->method_data(); | |
776 if (!methodData->is_mature()) return PROB_UNKNOWN; | |
777 ciProfileData* data = methodData->bci_to_data(bci()); | |
778 if (!data->is_JumpData()) return PROB_UNKNOWN; | |
779 | |
780 // get taken and not taken values | |
781 int taken = data->as_JumpData()->taken(); | |
782 int not_taken = 0; | |
783 if (data->is_BranchData()) { | |
784 not_taken = data->as_BranchData()->not_taken(); | |
785 } | |
786 | |
787 // scale the counts to be commensurate with invocation counts: | |
788 taken = method()->scale_count(taken); | |
789 not_taken = method()->scale_count(not_taken); | |
790 | |
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791 // Give up if too few (or too many, in which case the sum will overflow) counts to be meaningful. |
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792 // We also check that individual counters are positive first, overwise the sum can become positive. |
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793 if (taken < 0 || not_taken < 0 || taken + not_taken < 40) { |
0 | 794 if (C->log() != NULL) { |
795 C->log()->elem("branch target_bci='%d' taken='%d' not_taken='%d'", iter().get_dest(), taken, not_taken); | |
796 } | |
797 return PROB_UNKNOWN; | |
798 } | |
799 | |
800 // Compute frequency that we arrive here | |
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801 float sum = taken + not_taken; |
0 | 802 // Adjust, if this block is a cloned private block but the |
803 // Jump counts are shared. Taken the private counts for | |
804 // just this path instead of the shared counts. | |
805 if( block()->count() > 0 ) | |
806 sum = block()->count(); | |
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807 cnt = sum / FreqCountInvocations; |
0 | 808 |
809 // Pin probability to sane limits | |
810 float prob; | |
811 if( !taken ) | |
812 prob = (0+PROB_MIN) / 2; | |
813 else if( !not_taken ) | |
814 prob = (1+PROB_MAX) / 2; | |
815 else { // Compute probability of true path | |
816 prob = (float)taken / (float)(taken + not_taken); | |
817 if (prob > PROB_MAX) prob = PROB_MAX; | |
818 if (prob < PROB_MIN) prob = PROB_MIN; | |
819 } | |
820 | |
821 assert((cnt > 0.0f) && (prob > 0.0f), | |
822 "Bad frequency assignment in if"); | |
823 | |
824 if (C->log() != NULL) { | |
825 const char* prob_str = NULL; | |
826 if (prob >= PROB_MAX) prob_str = (prob == PROB_MAX) ? "max" : "always"; | |
827 if (prob <= PROB_MIN) prob_str = (prob == PROB_MIN) ? "min" : "never"; | |
828 char prob_str_buf[30]; | |
829 if (prob_str == NULL) { | |
830 sprintf(prob_str_buf, "%g", prob); | |
831 prob_str = prob_str_buf; | |
832 } | |
833 C->log()->elem("branch target_bci='%d' taken='%d' not_taken='%d' cnt='%g' prob='%s'", | |
834 iter().get_dest(), taken, not_taken, cnt, prob_str); | |
835 } | |
836 return prob; | |
837 } | |
838 | |
839 //-----------------------------branch_prediction------------------------------- | |
840 float Parse::branch_prediction(float& cnt, | |
841 BoolTest::mask btest, | |
842 int target_bci) { | |
843 float prob = dynamic_branch_prediction(cnt); | |
844 // If prob is unknown, switch to static prediction | |
845 if (prob != PROB_UNKNOWN) return prob; | |
846 | |
847 prob = PROB_FAIR; // Set default value | |
848 if (btest == BoolTest::eq) // Exactly equal test? | |
849 prob = PROB_STATIC_INFREQUENT; // Assume its relatively infrequent | |
850 else if (btest == BoolTest::ne) | |
851 prob = PROB_STATIC_FREQUENT; // Assume its relatively frequent | |
852 | |
853 // If this is a conditional test guarding a backwards branch, | |
854 // assume its a loop-back edge. Make it a likely taken branch. | |
855 if (target_bci < bci()) { | |
856 if (is_osr_parse()) { // Could be a hot OSR'd loop; force deopt | |
857 // Since it's an OSR, we probably have profile data, but since | |
858 // branch_prediction returned PROB_UNKNOWN, the counts are too small. | |
859 // Let's make a special check here for completely zero counts. | |
860 ciMethodData* methodData = method()->method_data(); | |
861 if (!methodData->is_empty()) { | |
862 ciProfileData* data = methodData->bci_to_data(bci()); | |
863 // Only stop for truly zero counts, which mean an unknown part | |
864 // of the OSR-ed method, and we want to deopt to gather more stats. | |
865 // If you have ANY counts, then this loop is simply 'cold' relative | |
866 // to the OSR loop. | |
867 if (data->as_BranchData()->taken() + | |
868 data->as_BranchData()->not_taken() == 0 ) { | |
869 // This is the only way to return PROB_UNKNOWN: | |
870 return PROB_UNKNOWN; | |
871 } | |
872 } | |
873 } | |
874 prob = PROB_STATIC_FREQUENT; // Likely to take backwards branch | |
875 } | |
876 | |
877 assert(prob != PROB_UNKNOWN, "must have some guess at this point"); | |
878 return prob; | |
879 } | |
880 | |
881 // The magic constants are chosen so as to match the output of | |
882 // branch_prediction() when the profile reports a zero taken count. | |
883 // It is important to distinguish zero counts unambiguously, because | |
884 // some branches (e.g., _213_javac.Assembler.eliminate) validly produce | |
885 // very small but nonzero probabilities, which if confused with zero | |
886 // counts would keep the program recompiling indefinitely. | |
887 bool Parse::seems_never_taken(float prob) { | |
888 return prob < PROB_MIN; | |
889 } | |
890 | |
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891 // True if the comparison seems to be the kind that will not change its |
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892 // statistics from true to false. See comments in adjust_map_after_if. |
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893 // This question is only asked along paths which are already |
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894 // classifed as untaken (by seems_never_taken), so really, |
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895 // if a path is never taken, its controlling comparison is |
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896 // already acting in a stable fashion. If the comparison |
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897 // seems stable, we will put an expensive uncommon trap |
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898 // on the untaken path. To be conservative, and to allow |
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899 // partially executed counted loops to be compiled fully, |
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900 // we will plant uncommon traps only after pointer comparisons. |
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901 bool Parse::seems_stable_comparison(BoolTest::mask btest, Node* cmp) { |
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902 for (int depth = 4; depth > 0; depth--) { |
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903 // The following switch can find CmpP here over half the time for |
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904 // dynamic language code rich with type tests. |
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905 // Code using counted loops or array manipulations (typical |
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906 // of benchmarks) will have many (>80%) CmpI instructions. |
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907 switch (cmp->Opcode()) { |
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908 case Op_CmpP: |
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909 // A never-taken null check looks like CmpP/BoolTest::eq. |
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910 // These certainly should be closed off as uncommon traps. |
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911 if (btest == BoolTest::eq) |
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912 return true; |
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913 // A never-failed type check looks like CmpP/BoolTest::ne. |
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914 // Let's put traps on those, too, so that we don't have to compile |
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915 // unused paths with indeterminate dynamic type information. |
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916 if (ProfileDynamicTypes) |
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917 return true; |
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918 return false; |
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919 |
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920 case Op_CmpI: |
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921 // A small minority (< 10%) of CmpP are masked as CmpI, |
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922 // as if by boolean conversion ((p == q? 1: 0) != 0). |
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923 // Detect that here, even if it hasn't optimized away yet. |
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924 // Specifically, this covers the 'instanceof' operator. |
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925 if (btest == BoolTest::ne || btest == BoolTest::eq) { |
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926 if (_gvn.type(cmp->in(2))->singleton() && |
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927 cmp->in(1)->is_Phi()) { |
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928 PhiNode* phi = cmp->in(1)->as_Phi(); |
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929 int true_path = phi->is_diamond_phi(); |
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930 if (true_path > 0 && |
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931 _gvn.type(phi->in(1))->singleton() && |
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932 _gvn.type(phi->in(2))->singleton()) { |
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933 // phi->region->if_proj->ifnode->bool->cmp |
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934 BoolNode* bol = phi->in(0)->in(1)->in(0)->in(1)->as_Bool(); |
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935 btest = bol->_test._test; |
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936 cmp = bol->in(1); |
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937 continue; |
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938 } |
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939 } |
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940 } |
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941 return false; |
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942 } |
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943 } |
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944 return false; |
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945 } |
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946 |
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947 //-------------------------------repush_if_args-------------------------------- |
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948 // Push arguments of an "if" bytecode back onto the stack by adjusting _sp. |
1172 | 949 inline int Parse::repush_if_args() { |
0 | 950 #ifndef PRODUCT |
951 if (PrintOpto && WizardMode) { | |
952 tty->print("defending against excessive implicit null exceptions on %s @%d in ", | |
953 Bytecodes::name(iter().cur_bc()), iter().cur_bci()); | |
954 method()->print_name(); tty->cr(); | |
955 } | |
956 #endif | |
957 int bc_depth = - Bytecodes::depth(iter().cur_bc()); | |
958 assert(bc_depth == 1 || bc_depth == 2, "only two kinds of branches"); | |
959 DEBUG_ONLY(sync_jvms()); // argument(n) requires a synced jvms | |
960 assert(argument(0) != NULL, "must exist"); | |
961 assert(bc_depth == 1 || argument(1) != NULL, "two must exist"); | |
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962 inc_sp(bc_depth); |
1172 | 963 return bc_depth; |
0 | 964 } |
965 | |
966 //----------------------------------do_ifnull---------------------------------- | |
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967 void Parse::do_ifnull(BoolTest::mask btest, Node *c) { |
0 | 968 int target_bci = iter().get_dest(); |
969 | |
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970 Block* branch_block = successor_for_bci(target_bci); |
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971 Block* next_block = successor_for_bci(iter().next_bci()); |
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972 |
0 | 973 float cnt; |
974 float prob = branch_prediction(cnt, btest, target_bci); | |
975 if (prob == PROB_UNKNOWN) { | |
976 // (An earlier version of do_ifnull omitted this trap for OSR methods.) | |
977 #ifndef PRODUCT | |
978 if (PrintOpto && Verbose) | |
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979 tty->print_cr("Never-taken edge stops compilation at bci %d",bci()); |
0 | 980 #endif |
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981 repush_if_args(); // to gather stats on loop |
0 | 982 // We need to mark this branch as taken so that if we recompile we will |
983 // see that it is possible. In the tiered system the interpreter doesn't | |
984 // do profiling and by the time we get to the lower tier from the interpreter | |
985 // the path may be cold again. Make sure it doesn't look untaken | |
986 profile_taken_branch(target_bci, !ProfileInterpreter); | |
987 uncommon_trap(Deoptimization::Reason_unreached, | |
988 Deoptimization::Action_reinterpret, | |
989 NULL, "cold"); | |
10278 | 990 if (C->eliminate_boxing()) { |
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991 // Mark the successor blocks as parsed |
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992 branch_block->next_path_num(); |
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993 next_block->next_path_num(); |
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994 } |
0 | 995 return; |
996 } | |
997 | |
998 explicit_null_checks_inserted++; | |
999 | |
1000 // Generate real control flow | |
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1001 Node *tst = _gvn.transform( new (C) BoolNode( c, btest ) ); |
0 | 1002 |
1003 // Sanity check the probability value | |
1004 assert(prob > 0.0f,"Bad probability in Parser"); | |
1005 // Need xform to put node in hash table | |
1006 IfNode *iff = create_and_xform_if( control(), tst, prob, cnt ); | |
1007 assert(iff->_prob > 0.0f,"Optimizer made bad probability in parser"); | |
1008 // True branch | |
1009 { PreserveJVMState pjvms(this); | |
6804
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1010 Node* iftrue = _gvn.transform( new (C) IfTrueNode (iff) ); |
0 | 1011 set_control(iftrue); |
1012 | |
1013 if (stopped()) { // Path is dead? | |
1014 explicit_null_checks_elided++; | |
10278 | 1015 if (C->eliminate_boxing()) { |
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1016 // Mark the successor block as parsed |
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1017 branch_block->next_path_num(); |
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1018 } |
0 | 1019 } else { // Path is live. |
1020 // Update method data | |
1021 profile_taken_branch(target_bci); | |
1022 adjust_map_after_if(btest, c, prob, branch_block, next_block); | |
1172 | 1023 if (!stopped()) { |
0 | 1024 merge(target_bci); |
1172 | 1025 } |
0 | 1026 } |
1027 } | |
1028 | |
1029 // False branch | |
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1030 Node* iffalse = _gvn.transform( new (C) IfFalseNode(iff) ); |
0 | 1031 set_control(iffalse); |
1032 | |
1033 if (stopped()) { // Path is dead? | |
1034 explicit_null_checks_elided++; | |
10278 | 1035 if (C->eliminate_boxing()) { |
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1036 // Mark the successor block as parsed |
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1037 next_block->next_path_num(); |
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1038 } |
0 | 1039 } else { // Path is live. |
1040 // Update method data | |
1041 profile_not_taken_branch(); | |
1042 adjust_map_after_if(BoolTest(btest).negate(), c, 1.0-prob, | |
1043 next_block, branch_block); | |
1044 } | |
1045 } | |
1046 | |
1047 //------------------------------------do_if------------------------------------ | |
1048 void Parse::do_if(BoolTest::mask btest, Node* c) { | |
1049 int target_bci = iter().get_dest(); | |
1050 | |
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1051 Block* branch_block = successor_for_bci(target_bci); |
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1052 Block* next_block = successor_for_bci(iter().next_bci()); |
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1053 |
0 | 1054 float cnt; |
1055 float prob = branch_prediction(cnt, btest, target_bci); | |
1056 float untaken_prob = 1.0 - prob; | |
1057 | |
1058 if (prob == PROB_UNKNOWN) { | |
1059 #ifndef PRODUCT | |
1060 if (PrintOpto && Verbose) | |
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1061 tty->print_cr("Never-taken edge stops compilation at bci %d",bci()); |
0 | 1062 #endif |
1063 repush_if_args(); // to gather stats on loop | |
1064 // We need to mark this branch as taken so that if we recompile we will | |
1065 // see that it is possible. In the tiered system the interpreter doesn't | |
1066 // do profiling and by the time we get to the lower tier from the interpreter | |
1067 // the path may be cold again. Make sure it doesn't look untaken | |
1068 profile_taken_branch(target_bci, !ProfileInterpreter); | |
1069 uncommon_trap(Deoptimization::Reason_unreached, | |
1070 Deoptimization::Action_reinterpret, | |
1071 NULL, "cold"); | |
10278 | 1072 if (C->eliminate_boxing()) { |
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1073 // Mark the successor blocks as parsed |
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1074 branch_block->next_path_num(); |
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1075 next_block->next_path_num(); |
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1076 } |
0 | 1077 return; |
1078 } | |
1079 | |
1080 // Sanity check the probability value | |
1081 assert(0.0f < prob && prob < 1.0f,"Bad probability in Parser"); | |
1082 | |
1083 bool taken_if_true = true; | |
1084 // Convert BoolTest to canonical form: | |
1085 if (!BoolTest(btest).is_canonical()) { | |
1086 btest = BoolTest(btest).negate(); | |
1087 taken_if_true = false; | |
1088 // prob is NOT updated here; it remains the probability of the taken | |
1089 // path (as opposed to the prob of the path guarded by an 'IfTrueNode'). | |
1090 } | |
1091 assert(btest != BoolTest::eq, "!= is the only canonical exact test"); | |
1092 | |
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1093 Node* tst0 = new (C) BoolNode(c, btest); |
0 | 1094 Node* tst = _gvn.transform(tst0); |
1095 BoolTest::mask taken_btest = BoolTest::illegal; | |
1096 BoolTest::mask untaken_btest = BoolTest::illegal; | |
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1097 |
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1098 if (tst->is_Bool()) { |
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1099 // Refresh c from the transformed bool node, since it may be |
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1100 // simpler than the original c. Also re-canonicalize btest. |
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1101 // This wins when (Bool ne (Conv2B p) 0) => (Bool ne (CmpP p NULL)). |
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1102 // That can arise from statements like: if (x instanceof C) ... |
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1103 if (tst != tst0) { |
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1104 // Canonicalize one more time since transform can change it. |
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1105 btest = tst->as_Bool()->_test._test; |
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1106 if (!BoolTest(btest).is_canonical()) { |
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1107 // Reverse edges one more time... |
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1108 tst = _gvn.transform( tst->as_Bool()->negate(&_gvn) ); |
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1109 btest = tst->as_Bool()->_test._test; |
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1110 assert(BoolTest(btest).is_canonical(), "sanity"); |
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1111 taken_if_true = !taken_if_true; |
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1112 } |
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1113 c = tst->in(1); |
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1114 } |
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1115 BoolTest::mask neg_btest = BoolTest(btest).negate(); |
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1116 taken_btest = taken_if_true ? btest : neg_btest; |
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1117 untaken_btest = taken_if_true ? neg_btest : btest; |
0 | 1118 } |
1119 | |
1120 // Generate real control flow | |
1121 float true_prob = (taken_if_true ? prob : untaken_prob); | |
1122 IfNode* iff = create_and_map_if(control(), tst, true_prob, cnt); | |
1123 assert(iff->_prob > 0.0f,"Optimizer made bad probability in parser"); | |
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1124 Node* taken_branch = new (C) IfTrueNode(iff); |
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1125 Node* untaken_branch = new (C) IfFalseNode(iff); |
0 | 1126 if (!taken_if_true) { // Finish conversion to canonical form |
1127 Node* tmp = taken_branch; | |
1128 taken_branch = untaken_branch; | |
1129 untaken_branch = tmp; | |
1130 } | |
1131 | |
1132 // Branch is taken: | |
1133 { PreserveJVMState pjvms(this); | |
1134 taken_branch = _gvn.transform(taken_branch); | |
1135 set_control(taken_branch); | |
1136 | |
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1137 if (stopped()) { |
10278 | 1138 if (C->eliminate_boxing()) { |
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1139 // Mark the successor block as parsed |
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1140 branch_block->next_path_num(); |
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1141 } |
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1142 } else { |
0 | 1143 // Update method data |
1144 profile_taken_branch(target_bci); | |
1145 adjust_map_after_if(taken_btest, c, prob, branch_block, next_block); | |
1172 | 1146 if (!stopped()) { |
0 | 1147 merge(target_bci); |
1172 | 1148 } |
0 | 1149 } |
1150 } | |
1151 | |
1152 untaken_branch = _gvn.transform(untaken_branch); | |
1153 set_control(untaken_branch); | |
1154 | |
1155 // Branch not taken. | |
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1156 if (stopped()) { |
10278 | 1157 if (C->eliminate_boxing()) { |
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1158 // Mark the successor block as parsed |
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1159 next_block->next_path_num(); |
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1160 } |
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1161 } else { |
0 | 1162 // Update method data |
1163 profile_not_taken_branch(); | |
1164 adjust_map_after_if(untaken_btest, c, untaken_prob, | |
1165 next_block, branch_block); | |
1166 } | |
1167 } | |
1168 | |
1169 //----------------------------adjust_map_after_if------------------------------ | |
1170 // Adjust the JVM state to reflect the result of taking this path. | |
1171 // Basically, it means inspecting the CmpNode controlling this | |
1172 // branch, seeing how it constrains a tested value, and then | |
1173 // deciding if it's worth our while to encode this constraint | |
1174 // as graph nodes in the current abstract interpretation map. | |
1175 void Parse::adjust_map_after_if(BoolTest::mask btest, Node* c, float prob, | |
1176 Block* path, Block* other_path) { | |
1177 if (stopped() || !c->is_Cmp() || btest == BoolTest::illegal) | |
1178 return; // nothing to do | |
1179 | |
1180 bool is_fallthrough = (path == successor_for_bci(iter().next_bci())); | |
1181 | |
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1182 if (seems_never_taken(prob) && seems_stable_comparison(btest, c)) { |
0 | 1183 // If this might possibly turn into an implicit null check, |
1184 // and the null has never yet been seen, we need to generate | |
1185 // an uncommon trap, so as to recompile instead of suffering | |
1186 // with very slow branches. (We'll get the slow branches if | |
1187 // the program ever changes phase and starts seeing nulls here.) | |
1188 // | |
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1189 // We do not inspect for a null constant, since a node may |
0 | 1190 // optimize to 'null' later on. |
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1191 // |
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1192 // Null checks, and other tests which expect inequality, |
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1193 // show btest == BoolTest::eq along the non-taken branch. |
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1194 // On the other hand, type tests, must-be-null tests, |
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1195 // and other tests which expect pointer equality, |
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1196 // show btest == BoolTest::ne along the non-taken branch. |
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1197 // We prune both types of branches if they look unused. |
0 | 1198 repush_if_args(); |
1199 // We need to mark this branch as taken so that if we recompile we will | |
1200 // see that it is possible. In the tiered system the interpreter doesn't | |
1201 // do profiling and by the time we get to the lower tier from the interpreter | |
1202 // the path may be cold again. Make sure it doesn't look untaken | |
1203 if (is_fallthrough) { | |
1204 profile_not_taken_branch(!ProfileInterpreter); | |
1205 } else { | |
1206 profile_taken_branch(iter().get_dest(), !ProfileInterpreter); | |
1207 } | |
1208 uncommon_trap(Deoptimization::Reason_unreached, | |
1209 Deoptimization::Action_reinterpret, | |
1210 NULL, | |
1211 (is_fallthrough ? "taken always" : "taken never")); | |
1212 return; | |
1213 } | |
1214 | |
1215 Node* val = c->in(1); | |
1216 Node* con = c->in(2); | |
1217 const Type* tcon = _gvn.type(con); | |
1218 const Type* tval = _gvn.type(val); | |
1219 bool have_con = tcon->singleton(); | |
1220 if (tval->singleton()) { | |
1221 if (!have_con) { | |
1222 // Swap, so constant is in con. | |
1223 con = val; | |
1224 tcon = tval; | |
1225 val = c->in(2); | |
1226 tval = _gvn.type(val); | |
1227 btest = BoolTest(btest).commute(); | |
1228 have_con = true; | |
1229 } else { | |
1230 // Do we have two constants? Then leave well enough alone. | |
1231 have_con = false; | |
1232 } | |
1233 } | |
1234 if (!have_con) // remaining adjustments need a con | |
1235 return; | |
1236 | |
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1237 sharpen_type_after_if(btest, con, tcon, val, tval); |
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1238 } |
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1239 |
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1240 |
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1241 static Node* extract_obj_from_klass_load(PhaseGVN* gvn, Node* n) { |
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1242 Node* ldk; |
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1243 if (n->is_DecodeNKlass()) { |
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1244 if (n->in(1)->Opcode() != Op_LoadNKlass) { |
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1245 return NULL; |
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1246 } else { |
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1247 ldk = n->in(1); |
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1248 } |
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1249 } else if (n->Opcode() != Op_LoadKlass) { |
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1250 return NULL; |
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1251 } else { |
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1252 ldk = n; |
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1253 } |
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1254 assert(ldk != NULL && ldk->is_Load(), "should have found a LoadKlass or LoadNKlass node"); |
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1255 |
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1256 Node* adr = ldk->in(MemNode::Address); |
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1257 intptr_t off = 0; |
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1258 Node* obj = AddPNode::Ideal_base_and_offset(adr, gvn, off); |
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1259 if (obj == NULL || off != oopDesc::klass_offset_in_bytes()) // loading oopDesc::_klass? |
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1260 return NULL; |
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1261 const TypePtr* tp = gvn->type(obj)->is_ptr(); |
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1262 if (tp == NULL || !(tp->isa_instptr() || tp->isa_aryptr())) // is obj a Java object ptr? |
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1263 return NULL; |
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1264 |
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1265 return obj; |
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1266 } |
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1267 |
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1268 void Parse::sharpen_type_after_if(BoolTest::mask btest, |
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1269 Node* con, const Type* tcon, |
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1270 Node* val, const Type* tval) { |
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1271 // Look for opportunities to sharpen the type of a node |
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1272 // whose klass is compared with a constant klass. |
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1273 if (btest == BoolTest::eq && tcon->isa_klassptr()) { |
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1274 Node* obj = extract_obj_from_klass_load(&_gvn, val); |
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1275 const TypeOopPtr* con_type = tcon->isa_klassptr()->as_instance_type(); |
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1276 if (obj != NULL && (con_type->isa_instptr() || con_type->isa_aryptr())) { |
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1277 // Found: |
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1278 // Bool(CmpP(LoadKlass(obj._klass), ConP(Foo.klass)), [eq]) |
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1279 // or the narrowOop equivalent. |
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1280 const Type* obj_type = _gvn.type(obj); |
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1281 const TypeOopPtr* tboth = obj_type->join_speculative(con_type)->isa_oopptr(); |
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1282 if (tboth != NULL && tboth->klass_is_exact() && tboth != obj_type && |
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1283 tboth->higher_equal(obj_type)) { |
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1284 // obj has to be of the exact type Foo if the CmpP succeeds. |
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1285 int obj_in_map = map()->find_edge(obj); |
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1286 JVMState* jvms = this->jvms(); |
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1287 if (obj_in_map >= 0 && |
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1288 (jvms->is_loc(obj_in_map) || jvms->is_stk(obj_in_map))) { |
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1289 TypeNode* ccast = new (C) CheckCastPPNode(control(), obj, tboth); |
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1290 const Type* tcc = ccast->as_Type()->type(); |
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1291 assert(tcc != obj_type && tcc->higher_equal_speculative(obj_type), "must improve"); |
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1292 // Delay transform() call to allow recovery of pre-cast value |
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1293 // at the control merge. |
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1294 _gvn.set_type_bottom(ccast); |
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1295 record_for_igvn(ccast); |
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1296 // Here's the payoff. |
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1297 replace_in_map(obj, ccast); |
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1298 } |
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1299 } |
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1300 } |
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1301 } |
0 | 1302 |
1303 int val_in_map = map()->find_edge(val); | |
1304 if (val_in_map < 0) return; // replace_in_map would be useless | |
1305 { | |
1306 JVMState* jvms = this->jvms(); | |
1307 if (!(jvms->is_loc(val_in_map) || | |
1308 jvms->is_stk(val_in_map))) | |
1309 return; // again, it would be useless | |
1310 } | |
1311 | |
1312 // Check for a comparison to a constant, and "know" that the compared | |
1313 // value is constrained on this path. | |
1314 assert(tcon->singleton(), ""); | |
1315 ConstraintCastNode* ccast = NULL; | |
1316 Node* cast = NULL; | |
1317 | |
1318 switch (btest) { | |
1319 case BoolTest::eq: // Constant test? | |
1320 { | |
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1321 const Type* tboth = tcon->join_speculative(tval); |
0 | 1322 if (tboth == tval) break; // Nothing to gain. |
1323 if (tcon->isa_int()) { | |
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1324 ccast = new (C) CastIINode(val, tboth); |
0 | 1325 } else if (tcon == TypePtr::NULL_PTR) { |
1326 // Cast to null, but keep the pointer identity temporarily live. | |
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1327 ccast = new (C) CastPPNode(val, tboth); |
0 | 1328 } else { |
1329 const TypeF* tf = tcon->isa_float_constant(); | |
1330 const TypeD* td = tcon->isa_double_constant(); | |
1331 // Exclude tests vs float/double 0 as these could be | |
1332 // either +0 or -0. Just because you are equal to +0 | |
1333 // doesn't mean you ARE +0! | |
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1334 // Note, following code also replaces Long and Oop values. |
0 | 1335 if ((!tf || tf->_f != 0.0) && |
1336 (!td || td->_d != 0.0)) | |
1337 cast = con; // Replace non-constant val by con. | |
1338 } | |
1339 } | |
1340 break; | |
1341 | |
1342 case BoolTest::ne: | |
1343 if (tcon == TypePtr::NULL_PTR) { | |
1344 cast = cast_not_null(val, false); | |
1345 } | |
1346 break; | |
1347 | |
1348 default: | |
1349 // (At this point we could record int range types with CastII.) | |
1350 break; | |
1351 } | |
1352 | |
1353 if (ccast != NULL) { | |
1354 const Type* tcc = ccast->as_Type()->type(); | |
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1355 assert(tcc != tval && tcc->higher_equal_speculative(tval), "must improve"); |
0 | 1356 // Delay transform() call to allow recovery of pre-cast value |
1357 // at the control merge. | |
1358 ccast->set_req(0, control()); | |
1359 _gvn.set_type_bottom(ccast); | |
1360 record_for_igvn(ccast); | |
1361 cast = ccast; | |
1362 } | |
1363 | |
1364 if (cast != NULL) { // Here's the payoff. | |
1365 replace_in_map(val, cast); | |
1366 } | |
1367 } | |
1368 | |
12966 | 1369 /** |
1370 * Use speculative type to optimize CmpP node: if comparison is | |
1371 * against the low level class, cast the object to the speculative | |
1372 * type if any. CmpP should then go away. | |
1373 * | |
1374 * @param c expected CmpP node | |
1375 * @return result of CmpP on object casted to speculative type | |
1376 * | |
1377 */ | |
1378 Node* Parse::optimize_cmp_with_klass(Node* c) { | |
1379 // If this is transformed by the _gvn to a comparison with the low | |
1380 // level klass then we may be able to use speculation | |
1381 if (c->Opcode() == Op_CmpP && | |
1382 (c->in(1)->Opcode() == Op_LoadKlass || c->in(1)->Opcode() == Op_DecodeNKlass) && | |
1383 c->in(2)->is_Con()) { | |
1384 Node* load_klass = NULL; | |
1385 Node* decode = NULL; | |
1386 if (c->in(1)->Opcode() == Op_DecodeNKlass) { | |
1387 decode = c->in(1); | |
1388 load_klass = c->in(1)->in(1); | |
1389 } else { | |
1390 load_klass = c->in(1); | |
1391 } | |
1392 if (load_klass->in(2)->is_AddP()) { | |
1393 Node* addp = load_klass->in(2); | |
1394 Node* obj = addp->in(AddPNode::Address); | |
1395 const TypeOopPtr* obj_type = _gvn.type(obj)->is_oopptr(); | |
1396 if (obj_type->speculative_type() != NULL) { | |
1397 ciKlass* k = obj_type->speculative_type(); | |
1398 inc_sp(2); | |
1399 obj = maybe_cast_profiled_obj(obj, k); | |
1400 dec_sp(2); | |
1401 // Make the CmpP use the casted obj | |
1402 addp = basic_plus_adr(obj, addp->in(AddPNode::Offset)); | |
1403 load_klass = load_klass->clone(); | |
1404 load_klass->set_req(2, addp); | |
1405 load_klass = _gvn.transform(load_klass); | |
1406 if (decode != NULL) { | |
1407 decode = decode->clone(); | |
1408 decode->set_req(1, load_klass); | |
1409 load_klass = _gvn.transform(decode); | |
1410 } | |
1411 c = c->clone(); | |
1412 c->set_req(1, load_klass); | |
1413 c = _gvn.transform(c); | |
1414 } | |
1415 } | |
1416 } | |
1417 return c; | |
1418 } | |
0 | 1419 |
1420 //------------------------------do_one_bytecode-------------------------------- | |
1421 // Parse this bytecode, and alter the Parsers JVM->Node mapping | |
1422 void Parse::do_one_bytecode() { | |
1423 Node *a, *b, *c, *d; // Handy temps | |
1424 BoolTest::mask btest; | |
1425 int i; | |
1426 | |
1427 assert(!has_exceptions(), "bytecode entry state must be clear of throws"); | |
1428 | |
1429 if (C->check_node_count(NodeLimitFudgeFactor * 5, | |
1430 "out of nodes parsing method")) { | |
1431 return; | |
1432 } | |
1433 | |
1434 #ifdef ASSERT | |
1435 // for setting breakpoints | |
1436 if (TraceOptoParse) { | |
1437 tty->print(" @"); | |
1438 dump_bci(bci()); | |
8862 | 1439 tty->cr(); |
0 | 1440 } |
1441 #endif | |
1442 | |
1443 switch (bc()) { | |
1444 case Bytecodes::_nop: | |
1445 // do nothing | |
1446 break; | |
1447 case Bytecodes::_lconst_0: | |
1448 push_pair(longcon(0)); | |
1449 break; | |
1450 | |
1451 case Bytecodes::_lconst_1: | |
1452 push_pair(longcon(1)); | |
1453 break; | |
1454 | |
1455 case Bytecodes::_fconst_0: | |
1456 push(zerocon(T_FLOAT)); | |
1457 break; | |
1458 | |
1459 case Bytecodes::_fconst_1: | |
1460 push(makecon(TypeF::ONE)); | |
1461 break; | |
1462 | |
1463 case Bytecodes::_fconst_2: | |
1464 push(makecon(TypeF::make(2.0f))); | |
1465 break; | |
1466 | |
1467 case Bytecodes::_dconst_0: | |
1468 push_pair(zerocon(T_DOUBLE)); | |
1469 break; | |
1470 | |
1471 case Bytecodes::_dconst_1: | |
1472 push_pair(makecon(TypeD::ONE)); | |
1473 break; | |
1474 | |
1475 case Bytecodes::_iconst_m1:push(intcon(-1)); break; | |
1476 case Bytecodes::_iconst_0: push(intcon( 0)); break; | |
1477 case Bytecodes::_iconst_1: push(intcon( 1)); break; | |
1478 case Bytecodes::_iconst_2: push(intcon( 2)); break; | |
1479 case Bytecodes::_iconst_3: push(intcon( 3)); break; | |
1480 case Bytecodes::_iconst_4: push(intcon( 4)); break; | |
1481 case Bytecodes::_iconst_5: push(intcon( 5)); break; | |
1565 | 1482 case Bytecodes::_bipush: push(intcon(iter().get_constant_u1())); break; |
1483 case Bytecodes::_sipush: push(intcon(iter().get_constant_u2())); break; | |
0 | 1484 case Bytecodes::_aconst_null: push(null()); break; |
1485 case Bytecodes::_ldc: | |
1486 case Bytecodes::_ldc_w: | |
1487 case Bytecodes::_ldc2_w: | |
1488 // If the constant is unresolved, run this BC once in the interpreter. | |
1602 | 1489 { |
0 | 1490 ciConstant constant = iter().get_constant(); |
1602 | 1491 if (constant.basic_type() == T_OBJECT && |
1492 !constant.as_object()->is_loaded()) { | |
1493 int index = iter().get_constant_pool_index(); | |
1494 constantTag tag = iter().get_constant_pool_tag(index); | |
1495 uncommon_trap(Deoptimization::make_trap_request | |
1496 (Deoptimization::Reason_unloaded, | |
1497 Deoptimization::Action_reinterpret, | |
1498 index), | |
1499 NULL, tag.internal_name()); | |
1500 break; | |
0 | 1501 } |
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1502 assert(constant.basic_type() != T_OBJECT || constant.as_object()->is_instance(), |
1602 | 1503 "must be java_mirror of klass"); |
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1504 bool pushed = push_constant(constant, true); |
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1505 guarantee(pushed, "must be possible to push this constant"); |
0 | 1506 } |
1507 | |
1508 break; | |
1509 | |
1510 case Bytecodes::_aload_0: | |
1511 push( local(0) ); | |
1512 break; | |
1513 case Bytecodes::_aload_1: | |
1514 push( local(1) ); | |
1515 break; | |
1516 case Bytecodes::_aload_2: | |
1517 push( local(2) ); | |
1518 break; | |
1519 case Bytecodes::_aload_3: | |
1520 push( local(3) ); | |
1521 break; | |
1522 case Bytecodes::_aload: | |
1523 push( local(iter().get_index()) ); | |
1524 break; | |
1525 | |
1526 case Bytecodes::_fload_0: | |
1527 case Bytecodes::_iload_0: | |
1528 push( local(0) ); | |
1529 break; | |
1530 case Bytecodes::_fload_1: | |
1531 case Bytecodes::_iload_1: | |
1532 push( local(1) ); | |
1533 break; | |
1534 case Bytecodes::_fload_2: | |
1535 case Bytecodes::_iload_2: | |
1536 push( local(2) ); | |
1537 break; | |
1538 case Bytecodes::_fload_3: | |
1539 case Bytecodes::_iload_3: | |
1540 push( local(3) ); | |
1541 break; | |
1542 case Bytecodes::_fload: | |
1543 case Bytecodes::_iload: | |
1544 push( local(iter().get_index()) ); | |
1545 break; | |
1546 case Bytecodes::_lload_0: | |
1547 push_pair_local( 0 ); | |
1548 break; | |
1549 case Bytecodes::_lload_1: | |
1550 push_pair_local( 1 ); | |
1551 break; | |
1552 case Bytecodes::_lload_2: | |
1553 push_pair_local( 2 ); | |
1554 break; | |
1555 case Bytecodes::_lload_3: | |
1556 push_pair_local( 3 ); | |
1557 break; | |
1558 case Bytecodes::_lload: | |
1559 push_pair_local( iter().get_index() ); | |
1560 break; | |
1561 | |
1562 case Bytecodes::_dload_0: | |
1563 push_pair_local(0); | |
1564 break; | |
1565 case Bytecodes::_dload_1: | |
1566 push_pair_local(1); | |
1567 break; | |
1568 case Bytecodes::_dload_2: | |
1569 push_pair_local(2); | |
1570 break; | |
1571 case Bytecodes::_dload_3: | |
1572 push_pair_local(3); | |
1573 break; | |
1574 case Bytecodes::_dload: | |
1575 push_pair_local(iter().get_index()); | |
1576 break; | |
1577 case Bytecodes::_fstore_0: | |
1578 case Bytecodes::_istore_0: | |
1579 case Bytecodes::_astore_0: | |
1580 set_local( 0, pop() ); | |
1581 break; | |
1582 case Bytecodes::_fstore_1: | |
1583 case Bytecodes::_istore_1: | |
1584 case Bytecodes::_astore_1: | |
1585 set_local( 1, pop() ); | |
1586 break; | |
1587 case Bytecodes::_fstore_2: | |
1588 case Bytecodes::_istore_2: | |
1589 case Bytecodes::_astore_2: | |
1590 set_local( 2, pop() ); | |
1591 break; | |
1592 case Bytecodes::_fstore_3: | |
1593 case Bytecodes::_istore_3: | |
1594 case Bytecodes::_astore_3: | |
1595 set_local( 3, pop() ); | |
1596 break; | |
1597 case Bytecodes::_fstore: | |
1598 case Bytecodes::_istore: | |
1599 case Bytecodes::_astore: | |
1600 set_local( iter().get_index(), pop() ); | |
1601 break; | |
1602 // long stores | |
1603 case Bytecodes::_lstore_0: | |
1604 set_pair_local( 0, pop_pair() ); | |
1605 break; | |
1606 case Bytecodes::_lstore_1: | |
1607 set_pair_local( 1, pop_pair() ); | |
1608 break; | |
1609 case Bytecodes::_lstore_2: | |
1610 set_pair_local( 2, pop_pair() ); | |
1611 break; | |
1612 case Bytecodes::_lstore_3: | |
1613 set_pair_local( 3, pop_pair() ); | |
1614 break; | |
1615 case Bytecodes::_lstore: | |
1616 set_pair_local( iter().get_index(), pop_pair() ); | |
1617 break; | |
1618 | |
1619 // double stores | |
1620 case Bytecodes::_dstore_0: | |
1621 set_pair_local( 0, dstore_rounding(pop_pair()) ); | |
1622 break; | |
1623 case Bytecodes::_dstore_1: | |
1624 set_pair_local( 1, dstore_rounding(pop_pair()) ); | |
1625 break; | |
1626 case Bytecodes::_dstore_2: | |
1627 set_pair_local( 2, dstore_rounding(pop_pair()) ); | |
1628 break; | |
1629 case Bytecodes::_dstore_3: | |
1630 set_pair_local( 3, dstore_rounding(pop_pair()) ); | |
1631 break; | |
1632 case Bytecodes::_dstore: | |
1633 set_pair_local( iter().get_index(), dstore_rounding(pop_pair()) ); | |
1634 break; | |
1635 | |
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1636 case Bytecodes::_pop: dec_sp(1); break; |
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1637 case Bytecodes::_pop2: dec_sp(2); break; |
0 | 1638 case Bytecodes::_swap: |
1639 a = pop(); | |
1640 b = pop(); | |
1641 push(a); | |
1642 push(b); | |
1643 break; | |
1644 case Bytecodes::_dup: | |
1645 a = pop(); | |
1646 push(a); | |
1647 push(a); | |
1648 break; | |
1649 case Bytecodes::_dup_x1: | |
1650 a = pop(); | |
1651 b = pop(); | |
1652 push( a ); | |
1653 push( b ); | |
1654 push( a ); | |
1655 break; | |
1656 case Bytecodes::_dup_x2: | |
1657 a = pop(); | |
1658 b = pop(); | |
1659 c = pop(); | |
1660 push( a ); | |
1661 push( c ); | |
1662 push( b ); | |
1663 push( a ); | |
1664 break; | |
1665 case Bytecodes::_dup2: | |
1666 a = pop(); | |
1667 b = pop(); | |
1668 push( b ); | |
1669 push( a ); | |
1670 push( b ); | |
1671 push( a ); | |
1672 break; | |
1673 | |
1674 case Bytecodes::_dup2_x1: | |
1675 // before: .. c, b, a | |
1676 // after: .. b, a, c, b, a | |
1677 // not tested | |
1678 a = pop(); | |
1679 b = pop(); | |
1680 c = pop(); | |
1681 push( b ); | |
1682 push( a ); | |
1683 push( c ); | |
1684 push( b ); | |
1685 push( a ); | |
1686 break; | |
1687 case Bytecodes::_dup2_x2: | |
1688 // before: .. d, c, b, a | |
1689 // after: .. b, a, d, c, b, a | |
1690 // not tested | |
1691 a = pop(); | |
1692 b = pop(); | |
1693 c = pop(); | |
1694 d = pop(); | |
1695 push( b ); | |
1696 push( a ); | |
1697 push( d ); | |
1698 push( c ); | |
1699 push( b ); | |
1700 push( a ); | |
1701 break; | |
1702 | |
1703 case Bytecodes::_arraylength: { | |
1704 // Must do null-check with value on expression stack | |
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1705 Node *ary = null_check(peek(), T_ARRAY); |
0 | 1706 // Compile-time detect of null-exception? |
1707 if (stopped()) return; | |
1708 a = pop(); | |
1709 push(load_array_length(a)); | |
1710 break; | |
1711 } | |
1712 | |
1713 case Bytecodes::_baload: array_load(T_BYTE); break; | |
1714 case Bytecodes::_caload: array_load(T_CHAR); break; | |
1715 case Bytecodes::_iaload: array_load(T_INT); break; | |
1716 case Bytecodes::_saload: array_load(T_SHORT); break; | |
1717 case Bytecodes::_faload: array_load(T_FLOAT); break; | |
1718 case Bytecodes::_aaload: array_load(T_OBJECT); break; | |
1719 case Bytecodes::_laload: { | |
1720 a = array_addressing(T_LONG, 0); | |
605 | 1721 if (stopped()) return; // guaranteed null or range check |
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1722 dec_sp(2); // Pop array and index |
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1723 push_pair(make_load(control(), a, TypeLong::LONG, T_LONG, TypeAryPtr::LONGS, MemNode::unordered)); |
0 | 1724 break; |
1725 } | |
1726 case Bytecodes::_daload: { | |
1727 a = array_addressing(T_DOUBLE, 0); | |
605 | 1728 if (stopped()) return; // guaranteed null or range check |
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1729 dec_sp(2); // Pop array and index |
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1730 push_pair(make_load(control(), a, Type::DOUBLE, T_DOUBLE, TypeAryPtr::DOUBLES, MemNode::unordered)); |
0 | 1731 break; |
1732 } | |
1733 case Bytecodes::_bastore: array_store(T_BYTE); break; | |
1734 case Bytecodes::_castore: array_store(T_CHAR); break; | |
1735 case Bytecodes::_iastore: array_store(T_INT); break; | |
1736 case Bytecodes::_sastore: array_store(T_SHORT); break; | |
1737 case Bytecodes::_fastore: array_store(T_FLOAT); break; | |
1738 case Bytecodes::_aastore: { | |
1739 d = array_addressing(T_OBJECT, 1); | |
605 | 1740 if (stopped()) return; // guaranteed null or range check |
0 | 1741 array_store_check(); |
1742 c = pop(); // Oop to store | |
1743 b = pop(); // index (already used) | |
1744 a = pop(); // the array itself | |
827
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1745 const TypeOopPtr* elemtype = _gvn.type(a)->is_aryptr()->elem()->make_oopptr(); |
0 | 1746 const TypeAryPtr* adr_type = TypeAryPtr::OOPS; |
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1747 Node* store = store_oop_to_array(control(), a, d, adr_type, c, elemtype, T_OBJECT, MemNode::release); |
0 | 1748 break; |
1749 } | |
1750 case Bytecodes::_lastore: { | |
1751 a = array_addressing(T_LONG, 2); | |
605 | 1752 if (stopped()) return; // guaranteed null or range check |
0 | 1753 c = pop_pair(); |
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1754 dec_sp(2); // Pop array and index |
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1755 store_to_memory(control(), a, c, T_LONG, TypeAryPtr::LONGS, MemNode::unordered); |
0 | 1756 break; |
1757 } | |
1758 case Bytecodes::_dastore: { | |
1759 a = array_addressing(T_DOUBLE, 2); | |
605 | 1760 if (stopped()) return; // guaranteed null or range check |
0 | 1761 c = pop_pair(); |
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1762 dec_sp(2); // Pop array and index |
0 | 1763 c = dstore_rounding(c); |
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1764 store_to_memory(control(), a, c, T_DOUBLE, TypeAryPtr::DOUBLES, MemNode::unordered); |
0 | 1765 break; |
1766 } | |
1767 case Bytecodes::_getfield: | |
1768 do_getfield(); | |
1769 break; | |
1770 | |
1771 case Bytecodes::_getstatic: | |
1772 do_getstatic(); | |
1773 break; | |
1774 | |
1775 case Bytecodes::_putfield: | |
1776 do_putfield(); | |
1777 break; | |
1778 | |
1779 case Bytecodes::_putstatic: | |
1780 do_putstatic(); | |
1781 break; | |
1782 | |
1783 case Bytecodes::_irem: | |
1784 do_irem(); | |
1785 break; | |
1786 case Bytecodes::_idiv: | |
1787 // Must keep both values on the expression-stack during null-check | |
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1788 zero_check_int(peek()); |
0 | 1789 // Compile-time detect of null-exception? |
1790 if (stopped()) return; | |
1791 b = pop(); | |
1792 a = pop(); | |
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1793 push( _gvn.transform( new (C) DivINode(control(),a,b) ) ); |
0 | 1794 break; |
1795 case Bytecodes::_imul: | |
1796 b = pop(); a = pop(); | |
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1797 push( _gvn.transform( new (C) MulINode(a,b) ) ); |
0 | 1798 break; |
1799 case Bytecodes::_iadd: | |
1800 b = pop(); a = pop(); | |
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1801 push( _gvn.transform( new (C) AddINode(a,b) ) ); |
0 | 1802 break; |
1803 case Bytecodes::_ineg: | |
1804 a = pop(); | |
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1805 push( _gvn.transform( new (C) SubINode(_gvn.intcon(0),a)) ); |
0 | 1806 break; |
1807 case Bytecodes::_isub: | |
1808 b = pop(); a = pop(); | |
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1809 push( _gvn.transform( new (C) SubINode(a,b) ) ); |
0 | 1810 break; |
1811 case Bytecodes::_iand: | |
1812 b = pop(); a = pop(); | |
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1813 push( _gvn.transform( new (C) AndINode(a,b) ) ); |
0 | 1814 break; |
1815 case Bytecodes::_ior: | |
1816 b = pop(); a = pop(); | |
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1817 push( _gvn.transform( new (C) OrINode(a,b) ) ); |
0 | 1818 break; |
1819 case Bytecodes::_ixor: | |
1820 b = pop(); a = pop(); | |
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1821 push( _gvn.transform( new (C) XorINode(a,b) ) ); |
0 | 1822 break; |
1823 case Bytecodes::_ishl: | |
1824 b = pop(); a = pop(); | |
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1825 push( _gvn.transform( new (C) LShiftINode(a,b) ) ); |
0 | 1826 break; |
1827 case Bytecodes::_ishr: | |
1828 b = pop(); a = pop(); | |
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1829 push( _gvn.transform( new (C) RShiftINode(a,b) ) ); |
0 | 1830 break; |
1831 case Bytecodes::_iushr: | |
1832 b = pop(); a = pop(); | |
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1833 push( _gvn.transform( new (C) URShiftINode(a,b) ) ); |
0 | 1834 break; |
1835 | |
1836 case Bytecodes::_fneg: | |
1837 a = pop(); | |
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1838 b = _gvn.transform(new (C) NegFNode (a)); |
0 | 1839 push(b); |
1840 break; | |
1841 | |
1842 case Bytecodes::_fsub: | |
1843 b = pop(); | |
1844 a = pop(); | |
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1845 c = _gvn.transform( new (C) SubFNode(a,b) ); |
0 | 1846 d = precision_rounding(c); |
1847 push( d ); | |
1848 break; | |
1849 | |
1850 case Bytecodes::_fadd: | |
1851 b = pop(); | |
1852 a = pop(); | |
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1853 c = _gvn.transform( new (C) AddFNode(a,b) ); |
0 | 1854 d = precision_rounding(c); |
1855 push( d ); | |
1856 break; | |
1857 | |
1858 case Bytecodes::_fmul: | |
1859 b = pop(); | |
1860 a = pop(); | |
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1861 c = _gvn.transform( new (C) MulFNode(a,b) ); |
0 | 1862 d = precision_rounding(c); |
1863 push( d ); | |
1864 break; | |
1865 | |
1866 case Bytecodes::_fdiv: | |
1867 b = pop(); | |
1868 a = pop(); | |
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1869 c = _gvn.transform( new (C) DivFNode(0,a,b) ); |
0 | 1870 d = precision_rounding(c); |
1871 push( d ); | |
1872 break; | |
1873 | |
1874 case Bytecodes::_frem: | |
1875 if (Matcher::has_match_rule(Op_ModF)) { | |
1876 // Generate a ModF node. | |
1877 b = pop(); | |
1878 a = pop(); | |
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1879 c = _gvn.transform( new (C) ModFNode(0,a,b) ); |
0 | 1880 d = precision_rounding(c); |
1881 push( d ); | |
1882 } | |
1883 else { | |
1884 // Generate a call. | |
1885 modf(); | |
1886 } | |
1887 break; | |
1888 | |
1889 case Bytecodes::_fcmpl: | |
1890 b = pop(); | |
1891 a = pop(); | |
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1892 c = _gvn.transform( new (C) CmpF3Node( a, b)); |
0 | 1893 push(c); |
1894 break; | |
1895 case Bytecodes::_fcmpg: | |
1896 b = pop(); | |
1897 a = pop(); | |
1898 | |
1899 // Same as fcmpl but need to flip the unordered case. Swap the inputs, | |
1900 // which negates the result sign except for unordered. Flip the unordered | |
1901 // as well by using CmpF3 which implements unordered-lesser instead of | |
1902 // unordered-greater semantics. Finally, commute the result bits. Result | |
1903 // is same as using a CmpF3Greater except we did it with CmpF3 alone. | |
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1904 c = _gvn.transform( new (C) CmpF3Node( b, a)); |
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1905 c = _gvn.transform( new (C) SubINode(_gvn.intcon(0),c) ); |
0 | 1906 push(c); |
1907 break; | |
1908 | |
1909 case Bytecodes::_f2i: | |
1910 a = pop(); | |
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1911 push(_gvn.transform(new (C) ConvF2INode(a))); |
0 | 1912 break; |
1913 | |
1914 case Bytecodes::_d2i: | |
1915 a = pop_pair(); | |
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1916 b = _gvn.transform(new (C) ConvD2INode(a)); |
0 | 1917 push( b ); |
1918 break; | |
1919 | |
1920 case Bytecodes::_f2d: | |
1921 a = pop(); | |
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1922 b = _gvn.transform( new (C) ConvF2DNode(a)); |
0 | 1923 push_pair( b ); |
1924 break; | |
1925 | |
1926 case Bytecodes::_d2f: | |
1927 a = pop_pair(); | |
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1928 b = _gvn.transform( new (C) ConvD2FNode(a)); |
0 | 1929 // This breaks _227_mtrt (speed & correctness) and _222_mpegaudio (speed) |
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1930 //b = _gvn.transform(new (C) RoundFloatNode(0, b) ); |
0 | 1931 push( b ); |
1932 break; | |
1933 | |
1934 case Bytecodes::_l2f: | |
1935 if (Matcher::convL2FSupported()) { | |
1936 a = pop_pair(); | |
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1937 b = _gvn.transform( new (C) ConvL2FNode(a)); |
0 | 1938 // For i486.ad, FILD doesn't restrict precision to 24 or 53 bits. |
1939 // Rather than storing the result into an FP register then pushing | |
1940 // out to memory to round, the machine instruction that implements | |
1941 // ConvL2D is responsible for rounding. | |
1942 // c = precision_rounding(b); | |
1943 c = _gvn.transform(b); | |
1944 push(c); | |
1945 } else { | |
1946 l2f(); | |
1947 } | |
1948 break; | |
1949 | |
1950 case Bytecodes::_l2d: | |
1951 a = pop_pair(); | |
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1952 b = _gvn.transform( new (C) ConvL2DNode(a)); |
0 | 1953 // For i486.ad, rounding is always necessary (see _l2f above). |
1954 // c = dprecision_rounding(b); | |
1955 c = _gvn.transform(b); | |
1956 push_pair(c); | |
1957 break; | |
1958 | |
1959 case Bytecodes::_f2l: | |
1960 a = pop(); | |
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1961 b = _gvn.transform( new (C) ConvF2LNode(a)); |
0 | 1962 push_pair(b); |
1963 break; | |
1964 | |
1965 case Bytecodes::_d2l: | |
1966 a = pop_pair(); | |
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1967 b = _gvn.transform( new (C) ConvD2LNode(a)); |
0 | 1968 push_pair(b); |
1969 break; | |
1970 | |
1971 case Bytecodes::_dsub: | |
1972 b = pop_pair(); | |
1973 a = pop_pair(); | |
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1974 c = _gvn.transform( new (C) SubDNode(a,b) ); |
0 | 1975 d = dprecision_rounding(c); |
1976 push_pair( d ); | |
1977 break; | |
1978 | |
1979 case Bytecodes::_dadd: | |
1980 b = pop_pair(); | |
1981 a = pop_pair(); | |
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1982 c = _gvn.transform( new (C) AddDNode(a,b) ); |
0 | 1983 d = dprecision_rounding(c); |
1984 push_pair( d ); | |
1985 break; | |
1986 | |
1987 case Bytecodes::_dmul: | |
1988 b = pop_pair(); | |
1989 a = pop_pair(); | |
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1990 c = _gvn.transform( new (C) MulDNode(a,b) ); |
0 | 1991 d = dprecision_rounding(c); |
1992 push_pair( d ); | |
1993 break; | |
1994 | |
1995 case Bytecodes::_ddiv: | |
1996 b = pop_pair(); | |
1997 a = pop_pair(); | |
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1998 c = _gvn.transform( new (C) DivDNode(0,a,b) ); |
0 | 1999 d = dprecision_rounding(c); |
2000 push_pair( d ); | |
2001 break; | |
2002 | |
2003 case Bytecodes::_dneg: | |
2004 a = pop_pair(); | |
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2005 b = _gvn.transform(new (C) NegDNode (a)); |
0 | 2006 push_pair(b); |
2007 break; | |
2008 | |
2009 case Bytecodes::_drem: | |
2010 if (Matcher::has_match_rule(Op_ModD)) { | |
2011 // Generate a ModD node. | |
2012 b = pop_pair(); | |
2013 a = pop_pair(); | |
2014 // a % b | |
2015 | |
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2016 c = _gvn.transform( new (C) ModDNode(0,a,b) ); |
0 | 2017 d = dprecision_rounding(c); |
2018 push_pair( d ); | |
2019 } | |
2020 else { | |
2021 // Generate a call. | |
2022 modd(); | |
2023 } | |
2024 break; | |
2025 | |
2026 case Bytecodes::_dcmpl: | |
2027 b = pop_pair(); | |
2028 a = pop_pair(); | |
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2029 c = _gvn.transform( new (C) CmpD3Node( a, b)); |
0 | 2030 push(c); |
2031 break; | |
2032 | |
2033 case Bytecodes::_dcmpg: | |
2034 b = pop_pair(); | |
2035 a = pop_pair(); | |
2036 // Same as dcmpl but need to flip the unordered case. | |
2037 // Commute the inputs, which negates the result sign except for unordered. | |
2038 // Flip the unordered as well by using CmpD3 which implements | |
2039 // unordered-lesser instead of unordered-greater semantics. | |
2040 // Finally, negate the result bits. Result is same as using a | |
2041 // CmpD3Greater except we did it with CmpD3 alone. | |
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2042 c = _gvn.transform( new (C) CmpD3Node( b, a)); |
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2043 c = _gvn.transform( new (C) SubINode(_gvn.intcon(0),c) ); |
0 | 2044 push(c); |
2045 break; | |
2046 | |
2047 | |
2048 // Note for longs -> lo word is on TOS, hi word is on TOS - 1 | |
2049 case Bytecodes::_land: | |
2050 b = pop_pair(); | |
2051 a = pop_pair(); | |
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2052 c = _gvn.transform( new (C) AndLNode(a,b) ); |
0 | 2053 push_pair(c); |
2054 break; | |
2055 case Bytecodes::_lor: | |
2056 b = pop_pair(); | |
2057 a = pop_pair(); | |
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7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2058 c = _gvn.transform( new (C) OrLNode(a,b) ); |
0 | 2059 push_pair(c); |
2060 break; | |
2061 case Bytecodes::_lxor: | |
2062 b = pop_pair(); | |
2063 a = pop_pair(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2064 c = _gvn.transform( new (C) XorLNode(a,b) ); |
0 | 2065 push_pair(c); |
2066 break; | |
2067 | |
2068 case Bytecodes::_lshl: | |
2069 b = pop(); // the shift count | |
2070 a = pop_pair(); // value to be shifted | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2071 c = _gvn.transform( new (C) LShiftLNode(a,b) ); |
0 | 2072 push_pair(c); |
2073 break; | |
2074 case Bytecodes::_lshr: | |
2075 b = pop(); // the shift count | |
2076 a = pop_pair(); // value to be shifted | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2077 c = _gvn.transform( new (C) RShiftLNode(a,b) ); |
0 | 2078 push_pair(c); |
2079 break; | |
2080 case Bytecodes::_lushr: | |
2081 b = pop(); // the shift count | |
2082 a = pop_pair(); // value to be shifted | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2083 c = _gvn.transform( new (C) URShiftLNode(a,b) ); |
0 | 2084 push_pair(c); |
2085 break; | |
2086 case Bytecodes::_lmul: | |
2087 b = pop_pair(); | |
2088 a = pop_pair(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2089 c = _gvn.transform( new (C) MulLNode(a,b) ); |
0 | 2090 push_pair(c); |
2091 break; | |
2092 | |
2093 case Bytecodes::_lrem: | |
2094 // Must keep both values on the expression-stack during null-check | |
2095 assert(peek(0) == top(), "long word order"); | |
7194
beebba0acc11
7172640: C2: instrinsic implementations in LibraryCallKit should use argument() instead of pop()
twisti
parents:
6848
diff
changeset
|
2096 zero_check_long(peek(1)); |
0 | 2097 // Compile-time detect of null-exception? |
2098 if (stopped()) return; | |
2099 b = pop_pair(); | |
2100 a = pop_pair(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2101 c = _gvn.transform( new (C) ModLNode(control(),a,b) ); |
0 | 2102 push_pair(c); |
2103 break; | |
2104 | |
2105 case Bytecodes::_ldiv: | |
2106 // Must keep both values on the expression-stack during null-check | |
2107 assert(peek(0) == top(), "long word order"); | |
7194
beebba0acc11
7172640: C2: instrinsic implementations in LibraryCallKit should use argument() instead of pop()
twisti
parents:
6848
diff
changeset
|
2108 zero_check_long(peek(1)); |
0 | 2109 // Compile-time detect of null-exception? |
2110 if (stopped()) return; | |
2111 b = pop_pair(); | |
2112 a = pop_pair(); | |
6804
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7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2113 c = _gvn.transform( new (C) DivLNode(control(),a,b) ); |
0 | 2114 push_pair(c); |
2115 break; | |
2116 | |
2117 case Bytecodes::_ladd: | |
2118 b = pop_pair(); | |
2119 a = pop_pair(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2120 c = _gvn.transform( new (C) AddLNode(a,b) ); |
0 | 2121 push_pair(c); |
2122 break; | |
2123 case Bytecodes::_lsub: | |
2124 b = pop_pair(); | |
2125 a = pop_pair(); | |
6804
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7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2126 c = _gvn.transform( new (C) SubLNode(a,b) ); |
0 | 2127 push_pair(c); |
2128 break; | |
2129 case Bytecodes::_lcmp: | |
2130 // Safepoints are now inserted _before_ branches. The long-compare | |
2131 // bytecode painfully produces a 3-way value (-1,0,+1) which requires a | |
2132 // slew of control flow. These are usually followed by a CmpI vs zero and | |
2133 // a branch; this pattern then optimizes to the obvious long-compare and | |
2134 // branch. However, if the branch is backwards there's a Safepoint | |
2135 // inserted. The inserted Safepoint captures the JVM state at the | |
2136 // pre-branch point, i.e. it captures the 3-way value. Thus if a | |
2137 // long-compare is used to control a loop the debug info will force | |
2138 // computation of the 3-way value, even though the generated code uses a | |
2139 // long-compare and branch. We try to rectify the situation by inserting | |
2140 // a SafePoint here and have it dominate and kill the safepoint added at a | |
2141 // following backwards branch. At this point the JVM state merely holds 2 | |
2142 // longs but not the 3-way value. | |
2143 if( UseLoopSafepoints ) { | |
2144 switch( iter().next_bc() ) { | |
2145 case Bytecodes::_ifgt: | |
2146 case Bytecodes::_iflt: | |
2147 case Bytecodes::_ifge: | |
2148 case Bytecodes::_ifle: | |
2149 case Bytecodes::_ifne: | |
2150 case Bytecodes::_ifeq: | |
2151 // If this is a backwards branch in the bytecodes, add Safepoint | |
2152 maybe_add_safepoint(iter().next_get_dest()); | |
2153 } | |
2154 } | |
2155 b = pop_pair(); | |
2156 a = pop_pair(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2157 c = _gvn.transform( new (C) CmpL3Node( a, b )); |
0 | 2158 push(c); |
2159 break; | |
2160 | |
2161 case Bytecodes::_lneg: | |
2162 a = pop_pair(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2163 b = _gvn.transform( new (C) SubLNode(longcon(0),a)); |
0 | 2164 push_pair(b); |
2165 break; | |
2166 case Bytecodes::_l2i: | |
2167 a = pop_pair(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2168 push( _gvn.transform( new (C) ConvL2INode(a))); |
0 | 2169 break; |
2170 case Bytecodes::_i2l: | |
2171 a = pop(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
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6725
diff
changeset
|
2172 b = _gvn.transform( new (C) ConvI2LNode(a)); |
0 | 2173 push_pair(b); |
2174 break; | |
2175 case Bytecodes::_i2b: | |
2176 // Sign extend | |
2177 a = pop(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2178 a = _gvn.transform( new (C) LShiftINode(a,_gvn.intcon(24)) ); |
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2179 a = _gvn.transform( new (C) RShiftINode(a,_gvn.intcon(24)) ); |
0 | 2180 push( a ); |
2181 break; | |
2182 case Bytecodes::_i2s: | |
2183 a = pop(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2184 a = _gvn.transform( new (C) LShiftINode(a,_gvn.intcon(16)) ); |
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2185 a = _gvn.transform( new (C) RShiftINode(a,_gvn.intcon(16)) ); |
0 | 2186 push( a ); |
2187 break; | |
2188 case Bytecodes::_i2c: | |
2189 a = pop(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2190 push( _gvn.transform( new (C) AndINode(a,_gvn.intcon(0xFFFF)) ) ); |
0 | 2191 break; |
2192 | |
2193 case Bytecodes::_i2f: | |
2194 a = pop(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2195 b = _gvn.transform( new (C) ConvI2FNode(a) ) ; |
0 | 2196 c = precision_rounding(b); |
2197 push (b); | |
2198 break; | |
2199 | |
2200 case Bytecodes::_i2d: | |
2201 a = pop(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2202 b = _gvn.transform( new (C) ConvI2DNode(a)); |
0 | 2203 push_pair(b); |
2204 break; | |
2205 | |
2206 case Bytecodes::_iinc: // Increment local | |
2207 i = iter().get_index(); // Get local index | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2208 set_local( i, _gvn.transform( new (C) AddINode( _gvn.intcon(iter().get_iinc_con()), local(i) ) ) ); |
0 | 2209 break; |
2210 | |
2211 // Exit points of synchronized methods must have an unlock node | |
2212 case Bytecodes::_return: | |
2213 return_current(NULL); | |
2214 break; | |
2215 | |
2216 case Bytecodes::_ireturn: | |
2217 case Bytecodes::_areturn: | |
2218 case Bytecodes::_freturn: | |
2219 return_current(pop()); | |
2220 break; | |
2221 case Bytecodes::_lreturn: | |
2222 return_current(pop_pair()); | |
2223 break; | |
2224 case Bytecodes::_dreturn: | |
2225 return_current(pop_pair()); | |
2226 break; | |
2227 | |
2228 case Bytecodes::_athrow: | |
2229 // null exception oop throws NULL pointer exception | |
7194
beebba0acc11
7172640: C2: instrinsic implementations in LibraryCallKit should use argument() instead of pop()
twisti
parents:
6848
diff
changeset
|
2230 null_check(peek()); |
0 | 2231 if (stopped()) return; |
2232 // Hook the thrown exception directly to subsequent handlers. | |
2233 if (BailoutToInterpreterForThrows) { | |
2234 // Keep method interpreted from now on. | |
2235 uncommon_trap(Deoptimization::Reason_unhandled, | |
2236 Deoptimization::Action_make_not_compilable); | |
2237 return; | |
2238 } | |
1213
6deeaebad47a
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents:
1172
diff
changeset
|
2239 if (env()->jvmti_can_post_on_exceptions()) { |
6deeaebad47a
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents:
1172
diff
changeset
|
2240 // check if we must post exception events, take uncommon trap if so (with must_throw = false) |
6deeaebad47a
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents:
1172
diff
changeset
|
2241 uncommon_trap_if_should_post_on_exceptions(Deoptimization::Reason_unhandled, false); |
6deeaebad47a
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents:
1172
diff
changeset
|
2242 } |
6deeaebad47a
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents:
1172
diff
changeset
|
2243 // Here if either can_post_on_exceptions or should_post_on_exceptions is false |
0 | 2244 add_exception_state(make_exception_state(peek())); |
2245 break; | |
2246 | |
2247 case Bytecodes::_goto: // fall through | |
2248 case Bytecodes::_goto_w: { | |
2249 int target_bci = (bc() == Bytecodes::_goto) ? iter().get_dest() : iter().get_far_dest(); | |
2250 | |
2251 // If this is a backwards branch in the bytecodes, add Safepoint | |
2252 maybe_add_safepoint(target_bci); | |
2253 | |
2254 // Update method data | |
2255 profile_taken_branch(target_bci); | |
2256 | |
2257 // Merge the current control into the target basic block | |
2258 merge(target_bci); | |
2259 | |
2260 // See if we can get some profile data and hand it off to the next block | |
2261 Block *target_block = block()->successor_for_bci(target_bci); | |
2262 if (target_block->pred_count() != 1) break; | |
2263 ciMethodData* methodData = method()->method_data(); | |
2264 if (!methodData->is_mature()) break; | |
2265 ciProfileData* data = methodData->bci_to_data(bci()); | |
2266 assert( data->is_JumpData(), "" ); | |
2267 int taken = ((ciJumpData*)data)->taken(); | |
2268 taken = method()->scale_count(taken); | |
2269 target_block->set_count(taken); | |
2270 break; | |
2271 } | |
2272 | |
248
18aab3cdd513
6726504: handle do_ifxxx calls in parser more uniformly
rasbold
parents:
246
diff
changeset
|
2273 case Bytecodes::_ifnull: btest = BoolTest::eq; goto handle_if_null; |
18aab3cdd513
6726504: handle do_ifxxx calls in parser more uniformly
rasbold
parents:
246
diff
changeset
|
2274 case Bytecodes::_ifnonnull: btest = BoolTest::ne; goto handle_if_null; |
18aab3cdd513
6726504: handle do_ifxxx calls in parser more uniformly
rasbold
parents:
246
diff
changeset
|
2275 handle_if_null: |
254
3e333d6f35dd
6730192: expression stack wrong at deoptimization point
rasbold
parents:
248
diff
changeset
|
2276 // If this is a backwards branch in the bytecodes, add Safepoint |
3e333d6f35dd
6730192: expression stack wrong at deoptimization point
rasbold
parents:
248
diff
changeset
|
2277 maybe_add_safepoint(iter().get_dest()); |
248
18aab3cdd513
6726504: handle do_ifxxx calls in parser more uniformly
rasbold
parents:
246
diff
changeset
|
2278 a = null(); |
18aab3cdd513
6726504: handle do_ifxxx calls in parser more uniformly
rasbold
parents:
246
diff
changeset
|
2279 b = pop(); |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2280 c = _gvn.transform( new (C) CmpPNode(b, a) ); |
248
18aab3cdd513
6726504: handle do_ifxxx calls in parser more uniformly
rasbold
parents:
246
diff
changeset
|
2281 do_ifnull(btest, c); |
0 | 2282 break; |
2283 | |
2284 case Bytecodes::_if_acmpeq: btest = BoolTest::eq; goto handle_if_acmp; | |
2285 case Bytecodes::_if_acmpne: btest = BoolTest::ne; goto handle_if_acmp; | |
2286 handle_if_acmp: | |
254
3e333d6f35dd
6730192: expression stack wrong at deoptimization point
rasbold
parents:
248
diff
changeset
|
2287 // If this is a backwards branch in the bytecodes, add Safepoint |
3e333d6f35dd
6730192: expression stack wrong at deoptimization point
rasbold
parents:
248
diff
changeset
|
2288 maybe_add_safepoint(iter().get_dest()); |
0 | 2289 a = pop(); |
2290 b = pop(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2291 c = _gvn.transform( new (C) CmpPNode(b, a) ); |
12966 | 2292 c = optimize_cmp_with_klass(c); |
0 | 2293 do_if(btest, c); |
2294 break; | |
2295 | |
2296 case Bytecodes::_ifeq: btest = BoolTest::eq; goto handle_ifxx; | |
2297 case Bytecodes::_ifne: btest = BoolTest::ne; goto handle_ifxx; | |
2298 case Bytecodes::_iflt: btest = BoolTest::lt; goto handle_ifxx; | |
2299 case Bytecodes::_ifle: btest = BoolTest::le; goto handle_ifxx; | |
2300 case Bytecodes::_ifgt: btest = BoolTest::gt; goto handle_ifxx; | |
2301 case Bytecodes::_ifge: btest = BoolTest::ge; goto handle_ifxx; | |
2302 handle_ifxx: | |
254
3e333d6f35dd
6730192: expression stack wrong at deoptimization point
rasbold
parents:
248
diff
changeset
|
2303 // If this is a backwards branch in the bytecodes, add Safepoint |
3e333d6f35dd
6730192: expression stack wrong at deoptimization point
rasbold
parents:
248
diff
changeset
|
2304 maybe_add_safepoint(iter().get_dest()); |
0 | 2305 a = _gvn.intcon(0); |
2306 b = pop(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2307 c = _gvn.transform( new (C) CmpINode(b, a) ); |
0 | 2308 do_if(btest, c); |
2309 break; | |
2310 | |
2311 case Bytecodes::_if_icmpeq: btest = BoolTest::eq; goto handle_if_icmp; | |
2312 case Bytecodes::_if_icmpne: btest = BoolTest::ne; goto handle_if_icmp; | |
2313 case Bytecodes::_if_icmplt: btest = BoolTest::lt; goto handle_if_icmp; | |
2314 case Bytecodes::_if_icmple: btest = BoolTest::le; goto handle_if_icmp; | |
2315 case Bytecodes::_if_icmpgt: btest = BoolTest::gt; goto handle_if_icmp; | |
2316 case Bytecodes::_if_icmpge: btest = BoolTest::ge; goto handle_if_icmp; | |
2317 handle_if_icmp: | |
254
3e333d6f35dd
6730192: expression stack wrong at deoptimization point
rasbold
parents:
248
diff
changeset
|
2318 // If this is a backwards branch in the bytecodes, add Safepoint |
3e333d6f35dd
6730192: expression stack wrong at deoptimization point
rasbold
parents:
248
diff
changeset
|
2319 maybe_add_safepoint(iter().get_dest()); |
0 | 2320 a = pop(); |
2321 b = pop(); | |
6804
e626685e9f6c
7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents:
6725
diff
changeset
|
2322 c = _gvn.transform( new (C) CmpINode( b, a ) ); |
0 | 2323 do_if(btest, c); |
2324 break; | |
2325 | |
2326 case Bytecodes::_tableswitch: | |
2327 do_tableswitch(); | |
2328 break; | |
2329 | |
2330 case Bytecodes::_lookupswitch: | |
2331 do_lookupswitch(); | |
2332 break; | |
2333 | |
2334 case Bytecodes::_invokestatic: | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
605
diff
changeset
|
2335 case Bytecodes::_invokedynamic: |
0 | 2336 case Bytecodes::_invokespecial: |
2337 case Bytecodes::_invokevirtual: | |
2338 case Bytecodes::_invokeinterface: | |
2339 do_call(); | |
2340 break; | |
2341 case Bytecodes::_checkcast: | |
2342 do_checkcast(); | |
2343 break; | |
2344 case Bytecodes::_instanceof: | |
2345 do_instanceof(); | |
2346 break; | |
2347 case Bytecodes::_anewarray: | |
2348 do_anewarray(); | |
2349 break; | |
2350 case Bytecodes::_newarray: | |
2351 do_newarray((BasicType)iter().get_index()); | |
2352 break; | |
2353 case Bytecodes::_multianewarray: | |
2354 do_multianewarray(); | |
2355 break; | |
2356 case Bytecodes::_new: | |
2357 do_new(); | |
2358 break; | |
2359 | |
2360 case Bytecodes::_jsr: | |
2361 case Bytecodes::_jsr_w: | |
2362 do_jsr(); | |
2363 break; | |
2364 | |
2365 case Bytecodes::_ret: | |
2366 do_ret(); | |
2367 break; | |
2368 | |
2369 | |
2370 case Bytecodes::_monitorenter: | |
2371 do_monitor_enter(); | |
2372 break; | |
2373 | |
2374 case Bytecodes::_monitorexit: | |
2375 do_monitor_exit(); | |
2376 break; | |
2377 | |
2378 case Bytecodes::_breakpoint: | |
2379 // Breakpoint set concurrently to compile | |
2380 // %%% use an uncommon trap? | |
2381 C->record_failure("breakpoint in method"); | |
2382 return; | |
2383 | |
2384 default: | |
2385 #ifndef PRODUCT | |
2386 map()->dump(99); | |
2387 #endif | |
2388 tty->print("\nUnhandled bytecode %s\n", Bytecodes::name(bc()) ); | |
2389 ShouldNotReachHere(); | |
2390 } | |
2391 | |
2392 #ifndef PRODUCT | |
2393 IdealGraphPrinter *printer = IdealGraphPrinter::printer(); | |
2394 if(printer) { | |
2395 char buffer[256]; | |
2396 sprintf(buffer, "Bytecode %d: %s", bci(), Bytecodes::name(bc())); | |
2397 bool old = printer->traverse_outs(); | |
2398 printer->set_traverse_outs(true); | |
222 | 2399 printer->print_method(C, buffer, 4); |
0 | 2400 printer->set_traverse_outs(old); |
2401 } | |
2402 #endif | |
2403 } |