Mercurial > hg > graal-jvmci-8
annotate src/share/vm/opto/parse2.cpp @ 169:9148c65abefc
6695049: (coll) Create an x86 intrinsic for Arrays.equals
Summary: Intrinsify java/util/Arrays.equals(char[], char[])
Reviewed-by: kvn, never
author | rasbold |
---|---|
date | Thu, 29 May 2008 16:22:09 -0700 |
parents | c0939256690b |
children | d1605aabd0a1 1e026f8da827 |
rev | line source |
---|---|
0 | 1 /* |
2 * Copyright 1998-2007 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_parse2.cpp.incl" | |
27 | |
28 extern int explicit_null_checks_inserted, | |
29 explicit_null_checks_elided; | |
30 | |
31 //---------------------------------array_load---------------------------------- | |
32 void Parse::array_load(BasicType elem_type) { | |
33 const Type* elem = Type::TOP; | |
34 Node* adr = array_addressing(elem_type, 0, &elem); | |
35 if (stopped()) return; // guarenteed null or range check | |
36 _sp -= 2; // Pop array and index | |
37 const TypeAryPtr* adr_type = TypeAryPtr::get_array_body_type(elem_type); | |
38 Node* ld = make_load(control(), adr, elem, elem_type, adr_type); | |
39 push(ld); | |
40 } | |
41 | |
42 | |
43 //--------------------------------array_store---------------------------------- | |
44 void Parse::array_store(BasicType elem_type) { | |
45 Node* adr = array_addressing(elem_type, 1); | |
46 if (stopped()) return; // guarenteed null or range check | |
47 Node* val = pop(); | |
48 _sp -= 2; // Pop array and index | |
49 const TypeAryPtr* adr_type = TypeAryPtr::get_array_body_type(elem_type); | |
50 store_to_memory(control(), adr, val, elem_type, adr_type); | |
51 } | |
52 | |
53 | |
54 //------------------------------array_addressing------------------------------- | |
55 // Pull array and index from the stack. Compute pointer-to-element. | |
56 Node* Parse::array_addressing(BasicType type, int vals, const Type* *result2) { | |
57 Node *idx = peek(0+vals); // Get from stack without popping | |
58 Node *ary = peek(1+vals); // in case of exception | |
59 | |
60 // Null check the array base, with correct stack contents | |
61 ary = do_null_check(ary, T_ARRAY); | |
62 // Compile-time detect of null-exception? | |
63 if (stopped()) return top(); | |
64 | |
65 const TypeAryPtr* arytype = _gvn.type(ary)->is_aryptr(); | |
66 const TypeInt* sizetype = arytype->size(); | |
67 const Type* elemtype = arytype->elem(); | |
68 | |
69 if (UseUniqueSubclasses && result2 != NULL) { | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
37
diff
changeset
|
70 const Type* el = elemtype; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
37
diff
changeset
|
71 if (elemtype->isa_narrowoop()) { |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
37
diff
changeset
|
72 el = elemtype->is_narrowoop()->make_oopptr(); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
37
diff
changeset
|
73 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
37
diff
changeset
|
74 const TypeInstPtr* toop = el->isa_instptr(); |
0 | 75 if (toop) { |
76 if (toop->klass()->as_instance_klass()->unique_concrete_subklass()) { | |
77 // If we load from "AbstractClass[]" we must see "ConcreteSubClass". | |
78 const Type* subklass = Type::get_const_type(toop->klass()); | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
37
diff
changeset
|
79 elemtype = subklass->join(el); |
0 | 80 } |
81 } | |
82 } | |
83 | |
84 // Check for big class initializers with all constant offsets | |
85 // feeding into a known-size array. | |
86 const TypeInt* idxtype = _gvn.type(idx)->is_int(); | |
87 // See if the highest idx value is less than the lowest array bound, | |
88 // and if the idx value cannot be negative: | |
89 bool need_range_check = true; | |
90 if (idxtype->_hi < sizetype->_lo && idxtype->_lo >= 0) { | |
91 need_range_check = false; | |
92 if (C->log() != NULL) C->log()->elem("observe that='!need_range_check'"); | |
93 } | |
94 | |
95 if (!arytype->klass()->is_loaded()) { | |
96 // Only fails for some -Xcomp runs | |
97 // The class is unloaded. We have to run this bytecode in the interpreter. | |
98 uncommon_trap(Deoptimization::Reason_unloaded, | |
99 Deoptimization::Action_reinterpret, | |
100 arytype->klass(), "!loaded array"); | |
101 return top(); | |
102 } | |
103 | |
104 // Do the range check | |
105 if (GenerateRangeChecks && need_range_check) { | |
106 // Range is constant in array-oop, so we can use the original state of mem | |
107 Node* len = load_array_length(ary); | |
129
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
108 Node* tst; |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
109 if (sizetype->_hi <= 0) { |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
110 // If the greatest array bound is negative, we can conclude that we're |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
111 // compiling unreachable code, but the unsigned compare trick used below |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
112 // only works with non-negative lengths. Instead, hack "tst" to be zero so |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
113 // the uncommon_trap path will always be taken. |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
114 tst = _gvn.intcon(0); |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
115 } else { |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
116 // Test length vs index (standard trick using unsigned compare) |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
117 Node* chk = _gvn.transform( new (C, 3) CmpUNode(idx, len) ); |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
118 BoolTest::mask btest = BoolTest::lt; |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
119 tst = _gvn.transform( new (C, 2) BoolNode(chk, btest) ); |
c0939256690b
6646019: array subscript expressions become top() with -d64
rasbold
parents:
113
diff
changeset
|
120 } |
0 | 121 // Branch to failure if out of bounds |
122 { BuildCutout unless(this, tst, PROB_MAX); | |
123 if (C->allow_range_check_smearing()) { | |
124 // Do not use builtin_throw, since range checks are sometimes | |
125 // made more stringent by an optimistic transformation. | |
126 // This creates "tentative" range checks at this point, | |
127 // which are not guaranteed to throw exceptions. | |
128 // See IfNode::Ideal, is_range_check, adjust_check. | |
129 uncommon_trap(Deoptimization::Reason_range_check, | |
130 Deoptimization::Action_make_not_entrant, | |
131 NULL, "range_check"); | |
132 } else { | |
133 // If we have already recompiled with the range-check-widening | |
134 // heroic optimization turned off, then we must really be throwing | |
135 // range check exceptions. | |
136 builtin_throw(Deoptimization::Reason_range_check, idx); | |
137 } | |
138 } | |
139 } | |
140 // Check for always knowing you are throwing a range-check exception | |
141 if (stopped()) return top(); | |
142 | |
143 Node* ptr = array_element_address( ary, idx, type, sizetype); | |
144 | |
145 if (result2 != NULL) *result2 = elemtype; | |
146 return ptr; | |
147 } | |
148 | |
149 | |
150 // returns IfNode | |
151 IfNode* Parse::jump_if_fork_int(Node* a, Node* b, BoolTest::mask mask) { | |
152 Node *cmp = _gvn.transform( new (C, 3) CmpINode( a, b)); // two cases: shiftcount > 32 and shiftcount <= 32 | |
153 Node *tst = _gvn.transform( new (C, 2) BoolNode( cmp, mask)); | |
154 IfNode *iff = create_and_map_if( control(), tst, ((mask == BoolTest::eq) ? PROB_STATIC_INFREQUENT : PROB_FAIR), COUNT_UNKNOWN ); | |
155 return iff; | |
156 } | |
157 | |
158 // return Region node | |
159 Node* Parse::jump_if_join(Node* iffalse, Node* iftrue) { | |
160 Node *region = new (C, 3) RegionNode(3); // 2 results | |
161 record_for_igvn(region); | |
162 region->init_req(1, iffalse); | |
163 region->init_req(2, iftrue ); | |
164 _gvn.set_type(region, Type::CONTROL); | |
165 region = _gvn.transform(region); | |
166 set_control (region); | |
167 return region; | |
168 } | |
169 | |
170 | |
171 //------------------------------helper for tableswitch------------------------- | |
172 void Parse::jump_if_true_fork(IfNode *iff, int dest_bci_if_true, int prof_table_index) { | |
173 // True branch, use existing map info | |
174 { PreserveJVMState pjvms(this); | |
175 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode (iff) ); | |
176 set_control( iftrue ); | |
177 profile_switch_case(prof_table_index); | |
178 merge_new_path(dest_bci_if_true); | |
179 } | |
180 | |
181 // False branch | |
182 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(iff) ); | |
183 set_control( iffalse ); | |
184 } | |
185 | |
186 void Parse::jump_if_false_fork(IfNode *iff, int dest_bci_if_true, int prof_table_index) { | |
187 // True branch, use existing map info | |
188 { PreserveJVMState pjvms(this); | |
189 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode (iff) ); | |
190 set_control( iffalse ); | |
191 profile_switch_case(prof_table_index); | |
192 merge_new_path(dest_bci_if_true); | |
193 } | |
194 | |
195 // False branch | |
196 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(iff) ); | |
197 set_control( iftrue ); | |
198 } | |
199 | |
200 void Parse::jump_if_always_fork(int dest_bci, int prof_table_index) { | |
201 // False branch, use existing map and control() | |
202 profile_switch_case(prof_table_index); | |
203 merge_new_path(dest_bci); | |
204 } | |
205 | |
206 | |
207 extern "C" { | |
208 static int jint_cmp(const void *i, const void *j) { | |
209 int a = *(jint *)i; | |
210 int b = *(jint *)j; | |
211 return a > b ? 1 : a < b ? -1 : 0; | |
212 } | |
213 } | |
214 | |
215 | |
216 // Default value for methodData switch indexing. Must be a negative value to avoid | |
217 // conflict with any legal switch index. | |
218 #define NullTableIndex -1 | |
219 | |
220 class SwitchRange : public StackObj { | |
221 // a range of integers coupled with a bci destination | |
222 jint _lo; // inclusive lower limit | |
223 jint _hi; // inclusive upper limit | |
224 int _dest; | |
225 int _table_index; // index into method data table | |
226 | |
227 public: | |
228 jint lo() const { return _lo; } | |
229 jint hi() const { return _hi; } | |
230 int dest() const { return _dest; } | |
231 int table_index() const { return _table_index; } | |
232 bool is_singleton() const { return _lo == _hi; } | |
233 | |
234 void setRange(jint lo, jint hi, int dest, int table_index) { | |
235 assert(lo <= hi, "must be a non-empty range"); | |
236 _lo = lo, _hi = hi; _dest = dest; _table_index = table_index; | |
237 } | |
238 bool adjoinRange(jint lo, jint hi, int dest, int table_index) { | |
239 assert(lo <= hi, "must be a non-empty range"); | |
240 if (lo == _hi+1 && dest == _dest && table_index == _table_index) { | |
241 _hi = hi; | |
242 return true; | |
243 } | |
244 return false; | |
245 } | |
246 | |
247 void set (jint value, int dest, int table_index) { | |
248 setRange(value, value, dest, table_index); | |
249 } | |
250 bool adjoin(jint value, int dest, int table_index) { | |
251 return adjoinRange(value, value, dest, table_index); | |
252 } | |
253 | |
254 void print(ciEnv* env) { | |
255 if (is_singleton()) | |
256 tty->print(" {%d}=>%d", lo(), dest()); | |
257 else if (lo() == min_jint) | |
258 tty->print(" {..%d}=>%d", hi(), dest()); | |
259 else if (hi() == max_jint) | |
260 tty->print(" {%d..}=>%d", lo(), dest()); | |
261 else | |
262 tty->print(" {%d..%d}=>%d", lo(), hi(), dest()); | |
263 } | |
264 }; | |
265 | |
266 | |
267 //-------------------------------do_tableswitch-------------------------------- | |
268 void Parse::do_tableswitch() { | |
269 Node* lookup = pop(); | |
270 | |
271 // Get information about tableswitch | |
272 int default_dest = iter().get_dest_table(0); | |
273 int lo_index = iter().get_int_table(1); | |
274 int hi_index = iter().get_int_table(2); | |
275 int len = hi_index - lo_index + 1; | |
276 | |
277 if (len < 1) { | |
278 // If this is a backward branch, add safepoint | |
279 maybe_add_safepoint(default_dest); | |
280 merge(default_dest); | |
281 return; | |
282 } | |
283 | |
284 // generate decision tree, using trichotomy when possible | |
285 int rnum = len+2; | |
286 bool makes_backward_branch = false; | |
287 SwitchRange* ranges = NEW_RESOURCE_ARRAY(SwitchRange, rnum); | |
288 int rp = -1; | |
289 if (lo_index != min_jint) { | |
290 ranges[++rp].setRange(min_jint, lo_index-1, default_dest, NullTableIndex); | |
291 } | |
292 for (int j = 0; j < len; j++) { | |
293 jint match_int = lo_index+j; | |
294 int dest = iter().get_dest_table(j+3); | |
295 makes_backward_branch |= (dest <= bci()); | |
296 int table_index = method_data_update() ? j : NullTableIndex; | |
297 if (rp < 0 || !ranges[rp].adjoin(match_int, dest, table_index)) { | |
298 ranges[++rp].set(match_int, dest, table_index); | |
299 } | |
300 } | |
301 jint highest = lo_index+(len-1); | |
302 assert(ranges[rp].hi() == highest, ""); | |
303 if (highest != max_jint | |
304 && !ranges[rp].adjoinRange(highest+1, max_jint, default_dest, NullTableIndex)) { | |
305 ranges[++rp].setRange(highest+1, max_jint, default_dest, NullTableIndex); | |
306 } | |
307 assert(rp < len+2, "not too many ranges"); | |
308 | |
309 // Safepoint in case if backward branch observed | |
310 if( makes_backward_branch && UseLoopSafepoints ) | |
311 add_safepoint(); | |
312 | |
313 jump_switch_ranges(lookup, &ranges[0], &ranges[rp]); | |
314 } | |
315 | |
316 | |
317 //------------------------------do_lookupswitch-------------------------------- | |
318 void Parse::do_lookupswitch() { | |
319 Node *lookup = pop(); // lookup value | |
320 // Get information about lookupswitch | |
321 int default_dest = iter().get_dest_table(0); | |
322 int len = iter().get_int_table(1); | |
323 | |
324 if (len < 1) { // If this is a backward branch, add safepoint | |
325 maybe_add_safepoint(default_dest); | |
326 merge(default_dest); | |
327 return; | |
328 } | |
329 | |
330 // generate decision tree, using trichotomy when possible | |
331 jint* table = NEW_RESOURCE_ARRAY(jint, len*2); | |
332 { | |
333 for( int j = 0; j < len; j++ ) { | |
334 table[j+j+0] = iter().get_int_table(2+j+j); | |
335 table[j+j+1] = iter().get_dest_table(2+j+j+1); | |
336 } | |
337 qsort( table, len, 2*sizeof(table[0]), jint_cmp ); | |
338 } | |
339 | |
340 int rnum = len*2+1; | |
341 bool makes_backward_branch = false; | |
342 SwitchRange* ranges = NEW_RESOURCE_ARRAY(SwitchRange, rnum); | |
343 int rp = -1; | |
344 for( int j = 0; j < len; j++ ) { | |
345 jint match_int = table[j+j+0]; | |
346 int dest = table[j+j+1]; | |
347 int next_lo = rp < 0 ? min_jint : ranges[rp].hi()+1; | |
348 int table_index = method_data_update() ? j : NullTableIndex; | |
349 makes_backward_branch |= (dest <= bci()); | |
350 if( match_int != next_lo ) { | |
351 ranges[++rp].setRange(next_lo, match_int-1, default_dest, NullTableIndex); | |
352 } | |
353 if( rp < 0 || !ranges[rp].adjoin(match_int, dest, table_index) ) { | |
354 ranges[++rp].set(match_int, dest, table_index); | |
355 } | |
356 } | |
357 jint highest = table[2*(len-1)]; | |
358 assert(ranges[rp].hi() == highest, ""); | |
359 if( highest != max_jint | |
360 && !ranges[rp].adjoinRange(highest+1, max_jint, default_dest, NullTableIndex) ) { | |
361 ranges[++rp].setRange(highest+1, max_jint, default_dest, NullTableIndex); | |
362 } | |
363 assert(rp < rnum, "not too many ranges"); | |
364 | |
365 // Safepoint in case backward branch observed | |
366 if( makes_backward_branch && UseLoopSafepoints ) | |
367 add_safepoint(); | |
368 | |
369 jump_switch_ranges(lookup, &ranges[0], &ranges[rp]); | |
370 } | |
371 | |
372 //----------------------------create_jump_tables------------------------------- | |
373 bool Parse::create_jump_tables(Node* key_val, SwitchRange* lo, SwitchRange* hi) { | |
374 // Are jumptables enabled | |
375 if (!UseJumpTables) return false; | |
376 | |
377 // Are jumptables supported | |
378 if (!Matcher::has_match_rule(Op_Jump)) return false; | |
379 | |
380 // Don't make jump table if profiling | |
381 if (method_data_update()) return false; | |
382 | |
383 // Decide if a guard is needed to lop off big ranges at either (or | |
384 // both) end(s) of the input set. We'll call this the default target | |
385 // even though we can't be sure that it is the true "default". | |
386 | |
387 bool needs_guard = false; | |
388 int default_dest; | |
389 int64 total_outlier_size = 0; | |
390 int64 hi_size = ((int64)hi->hi()) - ((int64)hi->lo()) + 1; | |
391 int64 lo_size = ((int64)lo->hi()) - ((int64)lo->lo()) + 1; | |
392 | |
393 if (lo->dest() == hi->dest()) { | |
394 total_outlier_size = hi_size + lo_size; | |
395 default_dest = lo->dest(); | |
396 } else if (lo_size > hi_size) { | |
397 total_outlier_size = lo_size; | |
398 default_dest = lo->dest(); | |
399 } else { | |
400 total_outlier_size = hi_size; | |
401 default_dest = hi->dest(); | |
402 } | |
403 | |
404 // If a guard test will eliminate very sparse end ranges, then | |
405 // it is worth the cost of an extra jump. | |
406 if (total_outlier_size > (MaxJumpTableSparseness * 4)) { | |
407 needs_guard = true; | |
408 if (default_dest == lo->dest()) lo++; | |
409 if (default_dest == hi->dest()) hi--; | |
410 } | |
411 | |
412 // Find the total number of cases and ranges | |
413 int64 num_cases = ((int64)hi->hi()) - ((int64)lo->lo()) + 1; | |
414 int num_range = hi - lo + 1; | |
415 | |
416 // Don't create table if: too large, too small, or too sparse. | |
417 if (num_cases < MinJumpTableSize || num_cases > MaxJumpTableSize) | |
418 return false; | |
419 if (num_cases > (MaxJumpTableSparseness * num_range)) | |
420 return false; | |
421 | |
422 // Normalize table lookups to zero | |
423 int lowval = lo->lo(); | |
424 key_val = _gvn.transform( new (C, 3) SubINode(key_val, _gvn.intcon(lowval)) ); | |
425 | |
426 // Generate a guard to protect against input keyvals that aren't | |
427 // in the switch domain. | |
428 if (needs_guard) { | |
429 Node* size = _gvn.intcon(num_cases); | |
430 Node* cmp = _gvn.transform( new (C, 3) CmpUNode(key_val, size) ); | |
431 Node* tst = _gvn.transform( new (C, 2) BoolNode(cmp, BoolTest::ge) ); | |
432 IfNode* iff = create_and_map_if( control(), tst, PROB_FAIR, COUNT_UNKNOWN); | |
433 jump_if_true_fork(iff, default_dest, NullTableIndex); | |
434 } | |
435 | |
436 // Create an ideal node JumpTable that has projections | |
437 // of all possible ranges for a switch statement | |
438 // The key_val input must be converted to a pointer offset and scaled. | |
439 // Compare Parse::array_addressing above. | |
440 #ifdef _LP64 | |
441 // Clean the 32-bit int into a real 64-bit offset. | |
442 // Otherwise, the jint value 0 might turn into an offset of 0x0800000000. | |
443 const TypeLong* lkeytype = TypeLong::make(CONST64(0), num_cases-1, Type::WidenMin); | |
444 key_val = _gvn.transform( new (C, 2) ConvI2LNode(key_val, lkeytype) ); | |
445 #endif | |
446 // Shift the value by wordsize so we have an index into the table, rather | |
447 // than a switch value | |
448 Node *shiftWord = _gvn.MakeConX(wordSize); | |
449 key_val = _gvn.transform( new (C, 3) MulXNode( key_val, shiftWord)); | |
450 | |
451 // Create the JumpNode | |
452 Node* jtn = _gvn.transform( new (C, 2) JumpNode(control(), key_val, num_cases) ); | |
453 | |
454 // These are the switch destinations hanging off the jumpnode | |
455 int i = 0; | |
456 for (SwitchRange* r = lo; r <= hi; r++) { | |
457 for (int j = r->lo(); j <= r->hi(); j++, i++) { | |
458 Node* input = _gvn.transform(new (C, 1) JumpProjNode(jtn, i, r->dest(), j - lowval)); | |
459 { | |
460 PreserveJVMState pjvms(this); | |
461 set_control(input); | |
462 jump_if_always_fork(r->dest(), r->table_index()); | |
463 } | |
464 } | |
465 } | |
466 assert(i == num_cases, "miscount of cases"); | |
467 stop_and_kill_map(); // no more uses for this JVMS | |
468 return true; | |
469 } | |
470 | |
471 //----------------------------jump_switch_ranges------------------------------- | |
472 void Parse::jump_switch_ranges(Node* key_val, SwitchRange *lo, SwitchRange *hi, int switch_depth) { | |
473 Block* switch_block = block(); | |
474 | |
475 if (switch_depth == 0) { | |
476 // Do special processing for the top-level call. | |
477 assert(lo->lo() == min_jint, "initial range must exhaust Type::INT"); | |
478 assert(hi->hi() == max_jint, "initial range must exhaust Type::INT"); | |
479 | |
480 // Decrement pred-numbers for the unique set of nodes. | |
481 #ifdef ASSERT | |
482 // Ensure that the block's successors are a (duplicate-free) set. | |
483 int successors_counted = 0; // block occurrences in [hi..lo] | |
484 int unique_successors = switch_block->num_successors(); | |
485 for (int i = 0; i < unique_successors; i++) { | |
486 Block* target = switch_block->successor_at(i); | |
487 | |
488 // Check that the set of successors is the same in both places. | |
489 int successors_found = 0; | |
490 for (SwitchRange* p = lo; p <= hi; p++) { | |
491 if (p->dest() == target->start()) successors_found++; | |
492 } | |
493 assert(successors_found > 0, "successor must be known"); | |
494 successors_counted += successors_found; | |
495 } | |
496 assert(successors_counted == (hi-lo)+1, "no unexpected successors"); | |
497 #endif | |
498 | |
499 // Maybe prune the inputs, based on the type of key_val. | |
500 jint min_val = min_jint; | |
501 jint max_val = max_jint; | |
502 const TypeInt* ti = key_val->bottom_type()->isa_int(); | |
503 if (ti != NULL) { | |
504 min_val = ti->_lo; | |
505 max_val = ti->_hi; | |
506 assert(min_val <= max_val, "invalid int type"); | |
507 } | |
508 while (lo->hi() < min_val) lo++; | |
509 if (lo->lo() < min_val) lo->setRange(min_val, lo->hi(), lo->dest(), lo->table_index()); | |
510 while (hi->lo() > max_val) hi--; | |
511 if (hi->hi() > max_val) hi->setRange(hi->lo(), max_val, hi->dest(), hi->table_index()); | |
512 } | |
513 | |
514 #ifndef PRODUCT | |
515 if (switch_depth == 0) { | |
516 _max_switch_depth = 0; | |
517 _est_switch_depth = log2_intptr((hi-lo+1)-1)+1; | |
518 } | |
519 #endif | |
520 | |
521 assert(lo <= hi, "must be a non-empty set of ranges"); | |
522 if (lo == hi) { | |
523 jump_if_always_fork(lo->dest(), lo->table_index()); | |
524 } else { | |
525 assert(lo->hi() == (lo+1)->lo()-1, "contiguous ranges"); | |
526 assert(hi->lo() == (hi-1)->hi()+1, "contiguous ranges"); | |
527 | |
528 if (create_jump_tables(key_val, lo, hi)) return; | |
529 | |
530 int nr = hi - lo + 1; | |
531 | |
532 SwitchRange* mid = lo + nr/2; | |
533 // if there is an easy choice, pivot at a singleton: | |
534 if (nr > 3 && !mid->is_singleton() && (mid-1)->is_singleton()) mid--; | |
535 | |
536 assert(lo < mid && mid <= hi, "good pivot choice"); | |
537 assert(nr != 2 || mid == hi, "should pick higher of 2"); | |
538 assert(nr != 3 || mid == hi-1, "should pick middle of 3"); | |
539 | |
540 Node *test_val = _gvn.intcon(mid->lo()); | |
541 | |
542 if (mid->is_singleton()) { | |
543 IfNode *iff_ne = jump_if_fork_int(key_val, test_val, BoolTest::ne); | |
544 jump_if_false_fork(iff_ne, mid->dest(), mid->table_index()); | |
545 | |
546 // Special Case: If there are exactly three ranges, and the high | |
547 // and low range each go to the same place, omit the "gt" test, | |
548 // since it will not discriminate anything. | |
549 bool eq_test_only = (hi == lo+2 && hi->dest() == lo->dest()); | |
550 if (eq_test_only) { | |
551 assert(mid == hi-1, ""); | |
552 } | |
553 | |
554 // if there is a higher range, test for it and process it: | |
555 if (mid < hi && !eq_test_only) { | |
556 // two comparisons of same values--should enable 1 test for 2 branches | |
557 // Use BoolTest::le instead of BoolTest::gt | |
558 IfNode *iff_le = jump_if_fork_int(key_val, test_val, BoolTest::le); | |
559 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(iff_le) ); | |
560 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(iff_le) ); | |
561 { PreserveJVMState pjvms(this); | |
562 set_control(iffalse); | |
563 jump_switch_ranges(key_val, mid+1, hi, switch_depth+1); | |
564 } | |
565 set_control(iftrue); | |
566 } | |
567 | |
568 } else { | |
569 // mid is a range, not a singleton, so treat mid..hi as a unit | |
570 IfNode *iff_ge = jump_if_fork_int(key_val, test_val, BoolTest::ge); | |
571 | |
572 // if there is a higher range, test for it and process it: | |
573 if (mid == hi) { | |
574 jump_if_true_fork(iff_ge, mid->dest(), mid->table_index()); | |
575 } else { | |
576 Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(iff_ge) ); | |
577 Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(iff_ge) ); | |
578 { PreserveJVMState pjvms(this); | |
579 set_control(iftrue); | |
580 jump_switch_ranges(key_val, mid, hi, switch_depth+1); | |
581 } | |
582 set_control(iffalse); | |
583 } | |
584 } | |
585 | |
586 // in any case, process the lower range | |
587 jump_switch_ranges(key_val, lo, mid-1, switch_depth+1); | |
588 } | |
589 | |
590 // Decrease pred_count for each successor after all is done. | |
591 if (switch_depth == 0) { | |
592 int unique_successors = switch_block->num_successors(); | |
593 for (int i = 0; i < unique_successors; i++) { | |
594 Block* target = switch_block->successor_at(i); | |
595 // Throw away the pre-allocated path for each unique successor. | |
596 target->next_path_num(); | |
597 } | |
598 } | |
599 | |
600 #ifndef PRODUCT | |
601 _max_switch_depth = MAX2(switch_depth, _max_switch_depth); | |
602 if (TraceOptoParse && Verbose && WizardMode && switch_depth == 0) { | |
603 SwitchRange* r; | |
604 int nsing = 0; | |
605 for( r = lo; r <= hi; r++ ) { | |
606 if( r->is_singleton() ) nsing++; | |
607 } | |
608 tty->print(">>> "); | |
609 _method->print_short_name(); | |
610 tty->print_cr(" switch decision tree"); | |
611 tty->print_cr(" %d ranges (%d singletons), max_depth=%d, est_depth=%d", | |
612 hi-lo+1, nsing, _max_switch_depth, _est_switch_depth); | |
613 if (_max_switch_depth > _est_switch_depth) { | |
614 tty->print_cr("******** BAD SWITCH DEPTH ********"); | |
615 } | |
616 tty->print(" "); | |
617 for( r = lo; r <= hi; r++ ) { | |
618 r->print(env()); | |
619 } | |
620 tty->print_cr(""); | |
621 } | |
622 #endif | |
623 } | |
624 | |
625 void Parse::modf() { | |
626 Node *f2 = pop(); | |
627 Node *f1 = pop(); | |
628 Node* c = make_runtime_call(RC_LEAF, OptoRuntime::modf_Type(), | |
629 CAST_FROM_FN_PTR(address, SharedRuntime::frem), | |
630 "frem", NULL, //no memory effects | |
631 f1, f2); | |
632 Node* res = _gvn.transform(new (C, 1) ProjNode(c, TypeFunc::Parms + 0)); | |
633 | |
634 push(res); | |
635 } | |
636 | |
637 void Parse::modd() { | |
638 Node *d2 = pop_pair(); | |
639 Node *d1 = pop_pair(); | |
640 Node* c = make_runtime_call(RC_LEAF, OptoRuntime::Math_DD_D_Type(), | |
641 CAST_FROM_FN_PTR(address, SharedRuntime::drem), | |
642 "drem", NULL, //no memory effects | |
643 d1, top(), d2, top()); | |
644 Node* res_d = _gvn.transform(new (C, 1) ProjNode(c, TypeFunc::Parms + 0)); | |
645 | |
646 #ifdef ASSERT | |
647 Node* res_top = _gvn.transform(new (C, 1) ProjNode(c, TypeFunc::Parms + 1)); | |
648 assert(res_top == top(), "second value must be top"); | |
649 #endif | |
650 | |
651 push_pair(res_d); | |
652 } | |
653 | |
654 void Parse::l2f() { | |
655 Node* f2 = pop(); | |
656 Node* f1 = pop(); | |
657 Node* c = make_runtime_call(RC_LEAF, OptoRuntime::l2f_Type(), | |
658 CAST_FROM_FN_PTR(address, SharedRuntime::l2f), | |
659 "l2f", NULL, //no memory effects | |
660 f1, f2); | |
661 Node* res = _gvn.transform(new (C, 1) ProjNode(c, TypeFunc::Parms + 0)); | |
662 | |
663 push(res); | |
664 } | |
665 | |
666 void Parse::do_irem() { | |
667 // Must keep both values on the expression-stack during null-check | |
668 do_null_check(peek(), T_INT); | |
669 // Compile-time detect of null-exception? | |
670 if (stopped()) return; | |
671 | |
672 Node* b = pop(); | |
673 Node* a = pop(); | |
674 | |
675 const Type *t = _gvn.type(b); | |
676 if (t != Type::TOP) { | |
677 const TypeInt *ti = t->is_int(); | |
678 if (ti->is_con()) { | |
679 int divisor = ti->get_con(); | |
680 // check for positive power of 2 | |
681 if (divisor > 0 && | |
682 (divisor & ~(divisor-1)) == divisor) { | |
683 // yes ! | |
684 Node *mask = _gvn.intcon((divisor - 1)); | |
685 // Sigh, must handle negative dividends | |
686 Node *zero = _gvn.intcon(0); | |
687 IfNode *ifff = jump_if_fork_int(a, zero, BoolTest::lt); | |
688 Node *iff = _gvn.transform( new (C, 1) IfFalseNode(ifff) ); | |
689 Node *ift = _gvn.transform( new (C, 1) IfTrueNode (ifff) ); | |
690 Node *reg = jump_if_join(ift, iff); | |
691 Node *phi = PhiNode::make(reg, NULL, TypeInt::INT); | |
692 // Negative path; negate/and/negate | |
693 Node *neg = _gvn.transform( new (C, 3) SubINode(zero, a) ); | |
694 Node *andn= _gvn.transform( new (C, 3) AndINode(neg, mask) ); | |
695 Node *negn= _gvn.transform( new (C, 3) SubINode(zero, andn) ); | |
696 phi->init_req(1, negn); | |
697 // Fast positive case | |
698 Node *andx = _gvn.transform( new (C, 3) AndINode(a, mask) ); | |
699 phi->init_req(2, andx); | |
700 // Push the merge | |
701 push( _gvn.transform(phi) ); | |
702 return; | |
703 } | |
704 } | |
705 } | |
706 // Default case | |
707 push( _gvn.transform( new (C, 3) ModINode(control(),a,b) ) ); | |
708 } | |
709 | |
710 // Handle jsr and jsr_w bytecode | |
711 void Parse::do_jsr() { | |
712 assert(bc() == Bytecodes::_jsr || bc() == Bytecodes::_jsr_w, "wrong bytecode"); | |
713 | |
714 // Store information about current state, tagged with new _jsr_bci | |
715 int return_bci = iter().next_bci(); | |
716 int jsr_bci = (bc() == Bytecodes::_jsr) ? iter().get_dest() : iter().get_far_dest(); | |
717 | |
718 // Update method data | |
719 profile_taken_branch(jsr_bci); | |
720 | |
721 // The way we do things now, there is only one successor block | |
722 // for the jsr, because the target code is cloned by ciTypeFlow. | |
723 Block* target = successor_for_bci(jsr_bci); | |
724 | |
725 // What got pushed? | |
726 const Type* ret_addr = target->peek(); | |
727 assert(ret_addr->singleton(), "must be a constant (cloned jsr body)"); | |
728 | |
729 // Effect on jsr on stack | |
730 push(_gvn.makecon(ret_addr)); | |
731 | |
732 // Flow to the jsr. | |
733 merge(jsr_bci); | |
734 } | |
735 | |
736 // Handle ret bytecode | |
737 void Parse::do_ret() { | |
738 // Find to whom we return. | |
739 #if 0 // %%%% MAKE THIS WORK | |
740 Node* con = local(); | |
741 const TypePtr* tp = con->bottom_type()->isa_ptr(); | |
742 assert(tp && tp->singleton(), ""); | |
743 int return_bci = (int) tp->get_con(); | |
744 merge(return_bci); | |
745 #else | |
746 assert(block()->num_successors() == 1, "a ret can only go one place now"); | |
747 Block* target = block()->successor_at(0); | |
748 assert(!target->is_ready(), "our arrival must be expected"); | |
749 profile_ret(target->flow()->start()); | |
750 int pnum = target->next_path_num(); | |
751 merge_common(target, pnum); | |
752 #endif | |
753 } | |
754 | |
755 //--------------------------dynamic_branch_prediction-------------------------- | |
756 // Try to gather dynamic branch prediction behavior. Return a probability | |
757 // of the branch being taken and set the "cnt" field. Returns a -1.0 | |
758 // if we need to use static prediction for some reason. | |
759 float Parse::dynamic_branch_prediction(float &cnt) { | |
760 ResourceMark rm; | |
761 | |
762 cnt = COUNT_UNKNOWN; | |
763 | |
764 // Use MethodData information if it is available | |
765 // FIXME: free the ProfileData structure | |
766 ciMethodData* methodData = method()->method_data(); | |
767 if (!methodData->is_mature()) return PROB_UNKNOWN; | |
768 ciProfileData* data = methodData->bci_to_data(bci()); | |
769 if (!data->is_JumpData()) return PROB_UNKNOWN; | |
770 | |
771 // get taken and not taken values | |
772 int taken = data->as_JumpData()->taken(); | |
773 int not_taken = 0; | |
774 if (data->is_BranchData()) { | |
775 not_taken = data->as_BranchData()->not_taken(); | |
776 } | |
777 | |
778 // scale the counts to be commensurate with invocation counts: | |
779 taken = method()->scale_count(taken); | |
780 not_taken = method()->scale_count(not_taken); | |
781 | |
782 // Give up if too few counts to be meaningful | |
783 if (taken + not_taken < 40) { | |
784 if (C->log() != NULL) { | |
785 C->log()->elem("branch target_bci='%d' taken='%d' not_taken='%d'", iter().get_dest(), taken, not_taken); | |
786 } | |
787 return PROB_UNKNOWN; | |
788 } | |
789 | |
790 // Compute frequency that we arrive here | |
791 int sum = taken + not_taken; | |
792 // Adjust, if this block is a cloned private block but the | |
793 // Jump counts are shared. Taken the private counts for | |
794 // just this path instead of the shared counts. | |
795 if( block()->count() > 0 ) | |
796 sum = block()->count(); | |
797 cnt = (float)sum / (float)FreqCountInvocations; | |
798 | |
799 // Pin probability to sane limits | |
800 float prob; | |
801 if( !taken ) | |
802 prob = (0+PROB_MIN) / 2; | |
803 else if( !not_taken ) | |
804 prob = (1+PROB_MAX) / 2; | |
805 else { // Compute probability of true path | |
806 prob = (float)taken / (float)(taken + not_taken); | |
807 if (prob > PROB_MAX) prob = PROB_MAX; | |
808 if (prob < PROB_MIN) prob = PROB_MIN; | |
809 } | |
810 | |
811 assert((cnt > 0.0f) && (prob > 0.0f), | |
812 "Bad frequency assignment in if"); | |
813 | |
814 if (C->log() != NULL) { | |
815 const char* prob_str = NULL; | |
816 if (prob >= PROB_MAX) prob_str = (prob == PROB_MAX) ? "max" : "always"; | |
817 if (prob <= PROB_MIN) prob_str = (prob == PROB_MIN) ? "min" : "never"; | |
818 char prob_str_buf[30]; | |
819 if (prob_str == NULL) { | |
820 sprintf(prob_str_buf, "%g", prob); | |
821 prob_str = prob_str_buf; | |
822 } | |
823 C->log()->elem("branch target_bci='%d' taken='%d' not_taken='%d' cnt='%g' prob='%s'", | |
824 iter().get_dest(), taken, not_taken, cnt, prob_str); | |
825 } | |
826 return prob; | |
827 } | |
828 | |
829 //-----------------------------branch_prediction------------------------------- | |
830 float Parse::branch_prediction(float& cnt, | |
831 BoolTest::mask btest, | |
832 int target_bci) { | |
833 float prob = dynamic_branch_prediction(cnt); | |
834 // If prob is unknown, switch to static prediction | |
835 if (prob != PROB_UNKNOWN) return prob; | |
836 | |
837 prob = PROB_FAIR; // Set default value | |
838 if (btest == BoolTest::eq) // Exactly equal test? | |
839 prob = PROB_STATIC_INFREQUENT; // Assume its relatively infrequent | |
840 else if (btest == BoolTest::ne) | |
841 prob = PROB_STATIC_FREQUENT; // Assume its relatively frequent | |
842 | |
843 // If this is a conditional test guarding a backwards branch, | |
844 // assume its a loop-back edge. Make it a likely taken branch. | |
845 if (target_bci < bci()) { | |
846 if (is_osr_parse()) { // Could be a hot OSR'd loop; force deopt | |
847 // Since it's an OSR, we probably have profile data, but since | |
848 // branch_prediction returned PROB_UNKNOWN, the counts are too small. | |
849 // Let's make a special check here for completely zero counts. | |
850 ciMethodData* methodData = method()->method_data(); | |
851 if (!methodData->is_empty()) { | |
852 ciProfileData* data = methodData->bci_to_data(bci()); | |
853 // Only stop for truly zero counts, which mean an unknown part | |
854 // of the OSR-ed method, and we want to deopt to gather more stats. | |
855 // If you have ANY counts, then this loop is simply 'cold' relative | |
856 // to the OSR loop. | |
857 if (data->as_BranchData()->taken() + | |
858 data->as_BranchData()->not_taken() == 0 ) { | |
859 // This is the only way to return PROB_UNKNOWN: | |
860 return PROB_UNKNOWN; | |
861 } | |
862 } | |
863 } | |
864 prob = PROB_STATIC_FREQUENT; // Likely to take backwards branch | |
865 } | |
866 | |
867 assert(prob != PROB_UNKNOWN, "must have some guess at this point"); | |
868 return prob; | |
869 } | |
870 | |
871 // The magic constants are chosen so as to match the output of | |
872 // branch_prediction() when the profile reports a zero taken count. | |
873 // It is important to distinguish zero counts unambiguously, because | |
874 // some branches (e.g., _213_javac.Assembler.eliminate) validly produce | |
875 // very small but nonzero probabilities, which if confused with zero | |
876 // counts would keep the program recompiling indefinitely. | |
877 bool Parse::seems_never_taken(float prob) { | |
878 return prob < PROB_MIN; | |
879 } | |
880 | |
881 inline void Parse::repush_if_args() { | |
882 #ifndef PRODUCT | |
883 if (PrintOpto && WizardMode) { | |
884 tty->print("defending against excessive implicit null exceptions on %s @%d in ", | |
885 Bytecodes::name(iter().cur_bc()), iter().cur_bci()); | |
886 method()->print_name(); tty->cr(); | |
887 } | |
888 #endif | |
889 int bc_depth = - Bytecodes::depth(iter().cur_bc()); | |
890 assert(bc_depth == 1 || bc_depth == 2, "only two kinds of branches"); | |
891 DEBUG_ONLY(sync_jvms()); // argument(n) requires a synced jvms | |
892 assert(argument(0) != NULL, "must exist"); | |
893 assert(bc_depth == 1 || argument(1) != NULL, "two must exist"); | |
894 _sp += bc_depth; | |
895 } | |
896 | |
897 //----------------------------------do_ifnull---------------------------------- | |
898 void Parse::do_ifnull(BoolTest::mask btest) { | |
899 int target_bci = iter().get_dest(); | |
900 | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
901 Block* branch_block = successor_for_bci(target_bci); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
902 Block* next_block = successor_for_bci(iter().next_bci()); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
903 |
0 | 904 float cnt; |
905 float prob = branch_prediction(cnt, btest, target_bci); | |
906 if (prob == PROB_UNKNOWN) { | |
907 // (An earlier version of do_ifnull omitted this trap for OSR methods.) | |
908 #ifndef PRODUCT | |
909 if (PrintOpto && Verbose) | |
910 tty->print_cr("Never-taken backedge stops compilation at bci %d",bci()); | |
911 #endif | |
912 repush_if_args(); // to gather stats on loop | |
913 // We need to mark this branch as taken so that if we recompile we will | |
914 // see that it is possible. In the tiered system the interpreter doesn't | |
915 // do profiling and by the time we get to the lower tier from the interpreter | |
916 // the path may be cold again. Make sure it doesn't look untaken | |
917 profile_taken_branch(target_bci, !ProfileInterpreter); | |
918 uncommon_trap(Deoptimization::Reason_unreached, | |
919 Deoptimization::Action_reinterpret, | |
920 NULL, "cold"); | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
921 if (EliminateAutoBox) { |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
922 // Mark the successor blocks as parsed |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
923 branch_block->next_path_num(); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
924 next_block->next_path_num(); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
925 } |
0 | 926 return; |
927 } | |
928 | |
929 // If this is a backwards branch in the bytecodes, add Safepoint | |
930 maybe_add_safepoint(target_bci); | |
931 | |
932 explicit_null_checks_inserted++; | |
933 Node* a = null(); | |
934 Node* b = pop(); | |
935 Node* c = _gvn.transform( new (C, 3) CmpPNode(b, a) ); | |
936 | |
937 // Make a cast-away-nullness that is control dependent on the test | |
938 const Type *t = _gvn.type(b); | |
939 const Type *t_not_null = t->join(TypePtr::NOTNULL); | |
940 Node *cast = new (C, 2) CastPPNode(b,t_not_null); | |
941 | |
942 // Generate real control flow | |
943 Node *tst = _gvn.transform( new (C, 2) BoolNode( c, btest ) ); | |
944 | |
945 // Sanity check the probability value | |
946 assert(prob > 0.0f,"Bad probability in Parser"); | |
947 // Need xform to put node in hash table | |
948 IfNode *iff = create_and_xform_if( control(), tst, prob, cnt ); | |
949 assert(iff->_prob > 0.0f,"Optimizer made bad probability in parser"); | |
950 // True branch | |
951 { PreserveJVMState pjvms(this); | |
952 Node* iftrue = _gvn.transform( new (C, 1) IfTrueNode (iff) ); | |
953 set_control(iftrue); | |
954 | |
955 if (stopped()) { // Path is dead? | |
956 explicit_null_checks_elided++; | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
957 if (EliminateAutoBox) { |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
958 // Mark the successor block as parsed |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
959 branch_block->next_path_num(); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
960 } |
0 | 961 } else { // Path is live. |
962 // Update method data | |
963 profile_taken_branch(target_bci); | |
964 adjust_map_after_if(btest, c, prob, branch_block, next_block); | |
965 if (!stopped()) | |
966 merge(target_bci); | |
967 } | |
968 } | |
969 | |
970 // False branch | |
971 Node* iffalse = _gvn.transform( new (C, 1) IfFalseNode(iff) ); | |
972 set_control(iffalse); | |
973 | |
974 if (stopped()) { // Path is dead? | |
975 explicit_null_checks_elided++; | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
976 if (EliminateAutoBox) { |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
977 // Mark the successor block as parsed |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
978 next_block->next_path_num(); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
979 } |
0 | 980 } else { // Path is live. |
981 // Update method data | |
982 profile_not_taken_branch(); | |
983 adjust_map_after_if(BoolTest(btest).negate(), c, 1.0-prob, | |
984 next_block, branch_block); | |
985 } | |
986 } | |
987 | |
988 //------------------------------------do_if------------------------------------ | |
989 void Parse::do_if(BoolTest::mask btest, Node* c) { | |
990 int target_bci = iter().get_dest(); | |
991 | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
992 Block* branch_block = successor_for_bci(target_bci); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
993 Block* next_block = successor_for_bci(iter().next_bci()); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
994 |
0 | 995 float cnt; |
996 float prob = branch_prediction(cnt, btest, target_bci); | |
997 float untaken_prob = 1.0 - prob; | |
998 | |
999 if (prob == PROB_UNKNOWN) { | |
1000 #ifndef PRODUCT | |
1001 if (PrintOpto && Verbose) | |
1002 tty->print_cr("Never-taken backedge stops compilation at bci %d",bci()); | |
1003 #endif | |
1004 repush_if_args(); // to gather stats on loop | |
1005 // We need to mark this branch as taken so that if we recompile we will | |
1006 // see that it is possible. In the tiered system the interpreter doesn't | |
1007 // do profiling and by the time we get to the lower tier from the interpreter | |
1008 // the path may be cold again. Make sure it doesn't look untaken | |
1009 profile_taken_branch(target_bci, !ProfileInterpreter); | |
1010 uncommon_trap(Deoptimization::Reason_unreached, | |
1011 Deoptimization::Action_reinterpret, | |
1012 NULL, "cold"); | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1013 if (EliminateAutoBox) { |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1014 // Mark the successor blocks as parsed |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1015 branch_block->next_path_num(); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1016 next_block->next_path_num(); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1017 } |
0 | 1018 return; |
1019 } | |
1020 | |
1021 // Sanity check the probability value | |
1022 assert(0.0f < prob && prob < 1.0f,"Bad probability in Parser"); | |
1023 | |
1024 bool taken_if_true = true; | |
1025 // Convert BoolTest to canonical form: | |
1026 if (!BoolTest(btest).is_canonical()) { | |
1027 btest = BoolTest(btest).negate(); | |
1028 taken_if_true = false; | |
1029 // prob is NOT updated here; it remains the probability of the taken | |
1030 // path (as opposed to the prob of the path guarded by an 'IfTrueNode'). | |
1031 } | |
1032 assert(btest != BoolTest::eq, "!= is the only canonical exact test"); | |
1033 | |
1034 Node* tst0 = new (C, 2) BoolNode(c, btest); | |
1035 Node* tst = _gvn.transform(tst0); | |
1036 BoolTest::mask taken_btest = BoolTest::illegal; | |
1037 BoolTest::mask untaken_btest = BoolTest::illegal; | |
37
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1038 |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1039 if (tst->is_Bool()) { |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1040 // Refresh c from the transformed bool node, since it may be |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1041 // simpler than the original c. Also re-canonicalize btest. |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1042 // This wins when (Bool ne (Conv2B p) 0) => (Bool ne (CmpP p NULL)). |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1043 // That can arise from statements like: if (x instanceof C) ... |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1044 if (tst != tst0) { |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1045 // Canonicalize one more time since transform can change it. |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1046 btest = tst->as_Bool()->_test._test; |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1047 if (!BoolTest(btest).is_canonical()) { |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1048 // Reverse edges one more time... |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1049 tst = _gvn.transform( tst->as_Bool()->negate(&_gvn) ); |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1050 btest = tst->as_Bool()->_test._test; |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1051 assert(BoolTest(btest).is_canonical(), "sanity"); |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1052 taken_if_true = !taken_if_true; |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1053 } |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1054 c = tst->in(1); |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1055 } |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1056 BoolTest::mask neg_btest = BoolTest(btest).negate(); |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1057 taken_btest = taken_if_true ? btest : neg_btest; |
73970d8c0b27
6671250: In Parse::do_if() old Cmp node 'c' should be replaced with new one after BoolNode transformation
kvn
parents:
17
diff
changeset
|
1058 untaken_btest = taken_if_true ? neg_btest : btest; |
0 | 1059 } |
1060 | |
1061 // Generate real control flow | |
1062 float true_prob = (taken_if_true ? prob : untaken_prob); | |
1063 IfNode* iff = create_and_map_if(control(), tst, true_prob, cnt); | |
1064 assert(iff->_prob > 0.0f,"Optimizer made bad probability in parser"); | |
1065 Node* taken_branch = new (C, 1) IfTrueNode(iff); | |
1066 Node* untaken_branch = new (C, 1) IfFalseNode(iff); | |
1067 if (!taken_if_true) { // Finish conversion to canonical form | |
1068 Node* tmp = taken_branch; | |
1069 taken_branch = untaken_branch; | |
1070 untaken_branch = tmp; | |
1071 } | |
1072 | |
1073 // Branch is taken: | |
1074 { PreserveJVMState pjvms(this); | |
1075 taken_branch = _gvn.transform(taken_branch); | |
1076 set_control(taken_branch); | |
1077 | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1078 if (stopped()) { |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1079 if (EliminateAutoBox) { |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1080 // Mark the successor block as parsed |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1081 branch_block->next_path_num(); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1082 } |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1083 } else { |
0 | 1084 // Update method data |
1085 profile_taken_branch(target_bci); | |
1086 adjust_map_after_if(taken_btest, c, prob, branch_block, next_block); | |
1087 if (!stopped()) | |
1088 merge(target_bci); | |
1089 } | |
1090 } | |
1091 | |
1092 untaken_branch = _gvn.transform(untaken_branch); | |
1093 set_control(untaken_branch); | |
1094 | |
1095 // Branch not taken. | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1096 if (stopped()) { |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1097 if (EliminateAutoBox) { |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1098 // Mark the successor block as parsed |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1099 next_block->next_path_num(); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1100 } |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1101 } else { |
0 | 1102 // Update method data |
1103 profile_not_taken_branch(); | |
1104 adjust_map_after_if(untaken_btest, c, untaken_prob, | |
1105 next_block, branch_block); | |
1106 } | |
1107 } | |
1108 | |
1109 //----------------------------adjust_map_after_if------------------------------ | |
1110 // Adjust the JVM state to reflect the result of taking this path. | |
1111 // Basically, it means inspecting the CmpNode controlling this | |
1112 // branch, seeing how it constrains a tested value, and then | |
1113 // deciding if it's worth our while to encode this constraint | |
1114 // as graph nodes in the current abstract interpretation map. | |
1115 void Parse::adjust_map_after_if(BoolTest::mask btest, Node* c, float prob, | |
1116 Block* path, Block* other_path) { | |
1117 if (stopped() || !c->is_Cmp() || btest == BoolTest::illegal) | |
1118 return; // nothing to do | |
1119 | |
1120 bool is_fallthrough = (path == successor_for_bci(iter().next_bci())); | |
1121 | |
1122 int cop = c->Opcode(); | |
1123 if (seems_never_taken(prob) && cop == Op_CmpP && btest == BoolTest::eq) { | |
1124 // (An earlier version of do_if omitted '&& btest == BoolTest::eq'.) | |
1125 // | |
1126 // If this might possibly turn into an implicit null check, | |
1127 // and the null has never yet been seen, we need to generate | |
1128 // an uncommon trap, so as to recompile instead of suffering | |
1129 // with very slow branches. (We'll get the slow branches if | |
1130 // the program ever changes phase and starts seeing nulls here.) | |
1131 // | |
1132 // The tests we worry about are of the form (p == null). | |
1133 // We do not simply inspect for a null constant, since a node may | |
1134 // optimize to 'null' later on. | |
1135 repush_if_args(); | |
1136 // We need to mark this branch as taken so that if we recompile we will | |
1137 // see that it is possible. In the tiered system the interpreter doesn't | |
1138 // do profiling and by the time we get to the lower tier from the interpreter | |
1139 // the path may be cold again. Make sure it doesn't look untaken | |
1140 if (is_fallthrough) { | |
1141 profile_not_taken_branch(!ProfileInterpreter); | |
1142 } else { | |
1143 profile_taken_branch(iter().get_dest(), !ProfileInterpreter); | |
1144 } | |
1145 uncommon_trap(Deoptimization::Reason_unreached, | |
1146 Deoptimization::Action_reinterpret, | |
1147 NULL, | |
1148 (is_fallthrough ? "taken always" : "taken never")); | |
1149 return; | |
1150 } | |
1151 | |
1152 Node* val = c->in(1); | |
1153 Node* con = c->in(2); | |
1154 const Type* tcon = _gvn.type(con); | |
1155 const Type* tval = _gvn.type(val); | |
1156 bool have_con = tcon->singleton(); | |
1157 if (tval->singleton()) { | |
1158 if (!have_con) { | |
1159 // Swap, so constant is in con. | |
1160 con = val; | |
1161 tcon = tval; | |
1162 val = c->in(2); | |
1163 tval = _gvn.type(val); | |
1164 btest = BoolTest(btest).commute(); | |
1165 have_con = true; | |
1166 } else { | |
1167 // Do we have two constants? Then leave well enough alone. | |
1168 have_con = false; | |
1169 } | |
1170 } | |
1171 if (!have_con) // remaining adjustments need a con | |
1172 return; | |
1173 | |
1174 | |
1175 int val_in_map = map()->find_edge(val); | |
1176 if (val_in_map < 0) return; // replace_in_map would be useless | |
1177 { | |
1178 JVMState* jvms = this->jvms(); | |
1179 if (!(jvms->is_loc(val_in_map) || | |
1180 jvms->is_stk(val_in_map))) | |
1181 return; // again, it would be useless | |
1182 } | |
1183 | |
1184 // Check for a comparison to a constant, and "know" that the compared | |
1185 // value is constrained on this path. | |
1186 assert(tcon->singleton(), ""); | |
1187 ConstraintCastNode* ccast = NULL; | |
1188 Node* cast = NULL; | |
1189 | |
1190 switch (btest) { | |
1191 case BoolTest::eq: // Constant test? | |
1192 { | |
1193 const Type* tboth = tcon->join(tval); | |
1194 if (tboth == tval) break; // Nothing to gain. | |
1195 if (tcon->isa_int()) { | |
1196 ccast = new (C, 2) CastIINode(val, tboth); | |
1197 } else if (tcon == TypePtr::NULL_PTR) { | |
1198 // Cast to null, but keep the pointer identity temporarily live. | |
1199 ccast = new (C, 2) CastPPNode(val, tboth); | |
1200 } else { | |
1201 const TypeF* tf = tcon->isa_float_constant(); | |
1202 const TypeD* td = tcon->isa_double_constant(); | |
1203 // Exclude tests vs float/double 0 as these could be | |
1204 // either +0 or -0. Just because you are equal to +0 | |
1205 // doesn't mean you ARE +0! | |
1206 if ((!tf || tf->_f != 0.0) && | |
1207 (!td || td->_d != 0.0)) | |
1208 cast = con; // Replace non-constant val by con. | |
1209 } | |
1210 } | |
1211 break; | |
1212 | |
1213 case BoolTest::ne: | |
1214 if (tcon == TypePtr::NULL_PTR) { | |
1215 cast = cast_not_null(val, false); | |
1216 } | |
1217 break; | |
1218 | |
1219 default: | |
1220 // (At this point we could record int range types with CastII.) | |
1221 break; | |
1222 } | |
1223 | |
1224 if (ccast != NULL) { | |
1225 const Type* tcc = ccast->as_Type()->type(); | |
1226 assert(tcc != tval && tcc->higher_equal(tval), "must improve"); | |
1227 // Delay transform() call to allow recovery of pre-cast value | |
1228 // at the control merge. | |
1229 ccast->set_req(0, control()); | |
1230 _gvn.set_type_bottom(ccast); | |
1231 record_for_igvn(ccast); | |
1232 cast = ccast; | |
1233 } | |
1234 | |
1235 if (cast != NULL) { // Here's the payoff. | |
1236 replace_in_map(val, cast); | |
1237 } | |
1238 } | |
1239 | |
1240 | |
1241 //------------------------------do_one_bytecode-------------------------------- | |
1242 // Parse this bytecode, and alter the Parsers JVM->Node mapping | |
1243 void Parse::do_one_bytecode() { | |
1244 Node *a, *b, *c, *d; // Handy temps | |
1245 BoolTest::mask btest; | |
1246 int i; | |
1247 | |
1248 assert(!has_exceptions(), "bytecode entry state must be clear of throws"); | |
1249 | |
1250 if (C->check_node_count(NodeLimitFudgeFactor * 5, | |
1251 "out of nodes parsing method")) { | |
1252 return; | |
1253 } | |
1254 | |
1255 #ifdef ASSERT | |
1256 // for setting breakpoints | |
1257 if (TraceOptoParse) { | |
1258 tty->print(" @"); | |
1259 dump_bci(bci()); | |
1260 } | |
1261 #endif | |
1262 | |
1263 switch (bc()) { | |
1264 case Bytecodes::_nop: | |
1265 // do nothing | |
1266 break; | |
1267 case Bytecodes::_lconst_0: | |
1268 push_pair(longcon(0)); | |
1269 break; | |
1270 | |
1271 case Bytecodes::_lconst_1: | |
1272 push_pair(longcon(1)); | |
1273 break; | |
1274 | |
1275 case Bytecodes::_fconst_0: | |
1276 push(zerocon(T_FLOAT)); | |
1277 break; | |
1278 | |
1279 case Bytecodes::_fconst_1: | |
1280 push(makecon(TypeF::ONE)); | |
1281 break; | |
1282 | |
1283 case Bytecodes::_fconst_2: | |
1284 push(makecon(TypeF::make(2.0f))); | |
1285 break; | |
1286 | |
1287 case Bytecodes::_dconst_0: | |
1288 push_pair(zerocon(T_DOUBLE)); | |
1289 break; | |
1290 | |
1291 case Bytecodes::_dconst_1: | |
1292 push_pair(makecon(TypeD::ONE)); | |
1293 break; | |
1294 | |
1295 case Bytecodes::_iconst_m1:push(intcon(-1)); break; | |
1296 case Bytecodes::_iconst_0: push(intcon( 0)); break; | |
1297 case Bytecodes::_iconst_1: push(intcon( 1)); break; | |
1298 case Bytecodes::_iconst_2: push(intcon( 2)); break; | |
1299 case Bytecodes::_iconst_3: push(intcon( 3)); break; | |
1300 case Bytecodes::_iconst_4: push(intcon( 4)); break; | |
1301 case Bytecodes::_iconst_5: push(intcon( 5)); break; | |
1302 case Bytecodes::_bipush: push(intcon( iter().get_byte())); break; | |
1303 case Bytecodes::_sipush: push(intcon( iter().get_short())); break; | |
1304 case Bytecodes::_aconst_null: push(null()); break; | |
1305 case Bytecodes::_ldc: | |
1306 case Bytecodes::_ldc_w: | |
1307 case Bytecodes::_ldc2_w: | |
1308 // If the constant is unresolved, run this BC once in the interpreter. | |
1309 if (iter().is_unresolved_string()) { | |
1310 uncommon_trap(Deoptimization::make_trap_request | |
1311 (Deoptimization::Reason_unloaded, | |
1312 Deoptimization::Action_reinterpret, | |
1313 iter().get_constant_index()), | |
1314 NULL, "unresolved_string"); | |
1315 break; | |
1316 } else { | |
1317 ciConstant constant = iter().get_constant(); | |
1318 if (constant.basic_type() == T_OBJECT) { | |
1319 ciObject* c = constant.as_object(); | |
1320 if (c->is_klass()) { | |
1321 // The constant returned for a klass is the ciKlass for the | |
1322 // entry. We want the java_mirror so get it. | |
1323 ciKlass* klass = c->as_klass(); | |
1324 if (klass->is_loaded()) { | |
1325 constant = ciConstant(T_OBJECT, klass->java_mirror()); | |
1326 } else { | |
1327 uncommon_trap(Deoptimization::make_trap_request | |
1328 (Deoptimization::Reason_unloaded, | |
1329 Deoptimization::Action_reinterpret, | |
1330 iter().get_constant_index()), | |
1331 NULL, "unresolved_klass"); | |
1332 break; | |
1333 } | |
1334 } | |
1335 } | |
1336 push_constant(constant); | |
1337 } | |
1338 | |
1339 break; | |
1340 | |
1341 case Bytecodes::_aload_0: | |
1342 push( local(0) ); | |
1343 break; | |
1344 case Bytecodes::_aload_1: | |
1345 push( local(1) ); | |
1346 break; | |
1347 case Bytecodes::_aload_2: | |
1348 push( local(2) ); | |
1349 break; | |
1350 case Bytecodes::_aload_3: | |
1351 push( local(3) ); | |
1352 break; | |
1353 case Bytecodes::_aload: | |
1354 push( local(iter().get_index()) ); | |
1355 break; | |
1356 | |
1357 case Bytecodes::_fload_0: | |
1358 case Bytecodes::_iload_0: | |
1359 push( local(0) ); | |
1360 break; | |
1361 case Bytecodes::_fload_1: | |
1362 case Bytecodes::_iload_1: | |
1363 push( local(1) ); | |
1364 break; | |
1365 case Bytecodes::_fload_2: | |
1366 case Bytecodes::_iload_2: | |
1367 push( local(2) ); | |
1368 break; | |
1369 case Bytecodes::_fload_3: | |
1370 case Bytecodes::_iload_3: | |
1371 push( local(3) ); | |
1372 break; | |
1373 case Bytecodes::_fload: | |
1374 case Bytecodes::_iload: | |
1375 push( local(iter().get_index()) ); | |
1376 break; | |
1377 case Bytecodes::_lload_0: | |
1378 push_pair_local( 0 ); | |
1379 break; | |
1380 case Bytecodes::_lload_1: | |
1381 push_pair_local( 1 ); | |
1382 break; | |
1383 case Bytecodes::_lload_2: | |
1384 push_pair_local( 2 ); | |
1385 break; | |
1386 case Bytecodes::_lload_3: | |
1387 push_pair_local( 3 ); | |
1388 break; | |
1389 case Bytecodes::_lload: | |
1390 push_pair_local( iter().get_index() ); | |
1391 break; | |
1392 | |
1393 case Bytecodes::_dload_0: | |
1394 push_pair_local(0); | |
1395 break; | |
1396 case Bytecodes::_dload_1: | |
1397 push_pair_local(1); | |
1398 break; | |
1399 case Bytecodes::_dload_2: | |
1400 push_pair_local(2); | |
1401 break; | |
1402 case Bytecodes::_dload_3: | |
1403 push_pair_local(3); | |
1404 break; | |
1405 case Bytecodes::_dload: | |
1406 push_pair_local(iter().get_index()); | |
1407 break; | |
1408 case Bytecodes::_fstore_0: | |
1409 case Bytecodes::_istore_0: | |
1410 case Bytecodes::_astore_0: | |
1411 set_local( 0, pop() ); | |
1412 break; | |
1413 case Bytecodes::_fstore_1: | |
1414 case Bytecodes::_istore_1: | |
1415 case Bytecodes::_astore_1: | |
1416 set_local( 1, pop() ); | |
1417 break; | |
1418 case Bytecodes::_fstore_2: | |
1419 case Bytecodes::_istore_2: | |
1420 case Bytecodes::_astore_2: | |
1421 set_local( 2, pop() ); | |
1422 break; | |
1423 case Bytecodes::_fstore_3: | |
1424 case Bytecodes::_istore_3: | |
1425 case Bytecodes::_astore_3: | |
1426 set_local( 3, pop() ); | |
1427 break; | |
1428 case Bytecodes::_fstore: | |
1429 case Bytecodes::_istore: | |
1430 case Bytecodes::_astore: | |
1431 set_local( iter().get_index(), pop() ); | |
1432 break; | |
1433 // long stores | |
1434 case Bytecodes::_lstore_0: | |
1435 set_pair_local( 0, pop_pair() ); | |
1436 break; | |
1437 case Bytecodes::_lstore_1: | |
1438 set_pair_local( 1, pop_pair() ); | |
1439 break; | |
1440 case Bytecodes::_lstore_2: | |
1441 set_pair_local( 2, pop_pair() ); | |
1442 break; | |
1443 case Bytecodes::_lstore_3: | |
1444 set_pair_local( 3, pop_pair() ); | |
1445 break; | |
1446 case Bytecodes::_lstore: | |
1447 set_pair_local( iter().get_index(), pop_pair() ); | |
1448 break; | |
1449 | |
1450 // double stores | |
1451 case Bytecodes::_dstore_0: | |
1452 set_pair_local( 0, dstore_rounding(pop_pair()) ); | |
1453 break; | |
1454 case Bytecodes::_dstore_1: | |
1455 set_pair_local( 1, dstore_rounding(pop_pair()) ); | |
1456 break; | |
1457 case Bytecodes::_dstore_2: | |
1458 set_pair_local( 2, dstore_rounding(pop_pair()) ); | |
1459 break; | |
1460 case Bytecodes::_dstore_3: | |
1461 set_pair_local( 3, dstore_rounding(pop_pair()) ); | |
1462 break; | |
1463 case Bytecodes::_dstore: | |
1464 set_pair_local( iter().get_index(), dstore_rounding(pop_pair()) ); | |
1465 break; | |
1466 | |
1467 case Bytecodes::_pop: _sp -= 1; break; | |
1468 case Bytecodes::_pop2: _sp -= 2; break; | |
1469 case Bytecodes::_swap: | |
1470 a = pop(); | |
1471 b = pop(); | |
1472 push(a); | |
1473 push(b); | |
1474 break; | |
1475 case Bytecodes::_dup: | |
1476 a = pop(); | |
1477 push(a); | |
1478 push(a); | |
1479 break; | |
1480 case Bytecodes::_dup_x1: | |
1481 a = pop(); | |
1482 b = pop(); | |
1483 push( a ); | |
1484 push( b ); | |
1485 push( a ); | |
1486 break; | |
1487 case Bytecodes::_dup_x2: | |
1488 a = pop(); | |
1489 b = pop(); | |
1490 c = pop(); | |
1491 push( a ); | |
1492 push( c ); | |
1493 push( b ); | |
1494 push( a ); | |
1495 break; | |
1496 case Bytecodes::_dup2: | |
1497 a = pop(); | |
1498 b = pop(); | |
1499 push( b ); | |
1500 push( a ); | |
1501 push( b ); | |
1502 push( a ); | |
1503 break; | |
1504 | |
1505 case Bytecodes::_dup2_x1: | |
1506 // before: .. c, b, a | |
1507 // after: .. b, a, c, b, a | |
1508 // not tested | |
1509 a = pop(); | |
1510 b = pop(); | |
1511 c = pop(); | |
1512 push( b ); | |
1513 push( a ); | |
1514 push( c ); | |
1515 push( b ); | |
1516 push( a ); | |
1517 break; | |
1518 case Bytecodes::_dup2_x2: | |
1519 // before: .. d, c, b, a | |
1520 // after: .. b, a, d, c, b, a | |
1521 // not tested | |
1522 a = pop(); | |
1523 b = pop(); | |
1524 c = pop(); | |
1525 d = pop(); | |
1526 push( b ); | |
1527 push( a ); | |
1528 push( d ); | |
1529 push( c ); | |
1530 push( b ); | |
1531 push( a ); | |
1532 break; | |
1533 | |
1534 case Bytecodes::_arraylength: { | |
1535 // Must do null-check with value on expression stack | |
1536 Node *ary = do_null_check(peek(), T_ARRAY); | |
1537 // Compile-time detect of null-exception? | |
1538 if (stopped()) return; | |
1539 a = pop(); | |
1540 push(load_array_length(a)); | |
1541 break; | |
1542 } | |
1543 | |
1544 case Bytecodes::_baload: array_load(T_BYTE); break; | |
1545 case Bytecodes::_caload: array_load(T_CHAR); break; | |
1546 case Bytecodes::_iaload: array_load(T_INT); break; | |
1547 case Bytecodes::_saload: array_load(T_SHORT); break; | |
1548 case Bytecodes::_faload: array_load(T_FLOAT); break; | |
1549 case Bytecodes::_aaload: array_load(T_OBJECT); break; | |
1550 case Bytecodes::_laload: { | |
1551 a = array_addressing(T_LONG, 0); | |
1552 if (stopped()) return; // guarenteed null or range check | |
1553 _sp -= 2; // Pop array and index | |
1554 push_pair( make_load(control(), a, TypeLong::LONG, T_LONG, TypeAryPtr::LONGS)); | |
1555 break; | |
1556 } | |
1557 case Bytecodes::_daload: { | |
1558 a = array_addressing(T_DOUBLE, 0); | |
1559 if (stopped()) return; // guarenteed null or range check | |
1560 _sp -= 2; // Pop array and index | |
1561 push_pair( make_load(control(), a, Type::DOUBLE, T_DOUBLE, TypeAryPtr::DOUBLES)); | |
1562 break; | |
1563 } | |
1564 case Bytecodes::_bastore: array_store(T_BYTE); break; | |
1565 case Bytecodes::_castore: array_store(T_CHAR); break; | |
1566 case Bytecodes::_iastore: array_store(T_INT); break; | |
1567 case Bytecodes::_sastore: array_store(T_SHORT); break; | |
1568 case Bytecodes::_fastore: array_store(T_FLOAT); break; | |
1569 case Bytecodes::_aastore: { | |
1570 d = array_addressing(T_OBJECT, 1); | |
1571 if (stopped()) return; // guarenteed null or range check | |
1572 array_store_check(); | |
1573 c = pop(); // Oop to store | |
1574 b = pop(); // index (already used) | |
1575 a = pop(); // the array itself | |
1576 const Type* elemtype = _gvn.type(a)->is_aryptr()->elem(); | |
1577 const TypeAryPtr* adr_type = TypeAryPtr::OOPS; | |
1578 Node* store = store_oop_to_array(control(), a, d, adr_type, c, elemtype, T_OBJECT); | |
1579 break; | |
1580 } | |
1581 case Bytecodes::_lastore: { | |
1582 a = array_addressing(T_LONG, 2); | |
1583 if (stopped()) return; // guarenteed null or range check | |
1584 c = pop_pair(); | |
1585 _sp -= 2; // Pop array and index | |
1586 store_to_memory(control(), a, c, T_LONG, TypeAryPtr::LONGS); | |
1587 break; | |
1588 } | |
1589 case Bytecodes::_dastore: { | |
1590 a = array_addressing(T_DOUBLE, 2); | |
1591 if (stopped()) return; // guarenteed null or range check | |
1592 c = pop_pair(); | |
1593 _sp -= 2; // Pop array and index | |
1594 c = dstore_rounding(c); | |
1595 store_to_memory(control(), a, c, T_DOUBLE, TypeAryPtr::DOUBLES); | |
1596 break; | |
1597 } | |
1598 case Bytecodes::_getfield: | |
1599 do_getfield(); | |
1600 break; | |
1601 | |
1602 case Bytecodes::_getstatic: | |
1603 do_getstatic(); | |
1604 break; | |
1605 | |
1606 case Bytecodes::_putfield: | |
1607 do_putfield(); | |
1608 break; | |
1609 | |
1610 case Bytecodes::_putstatic: | |
1611 do_putstatic(); | |
1612 break; | |
1613 | |
1614 case Bytecodes::_irem: | |
1615 do_irem(); | |
1616 break; | |
1617 case Bytecodes::_idiv: | |
1618 // Must keep both values on the expression-stack during null-check | |
1619 do_null_check(peek(), T_INT); | |
1620 // Compile-time detect of null-exception? | |
1621 if (stopped()) return; | |
1622 b = pop(); | |
1623 a = pop(); | |
1624 push( _gvn.transform( new (C, 3) DivINode(control(),a,b) ) ); | |
1625 break; | |
1626 case Bytecodes::_imul: | |
1627 b = pop(); a = pop(); | |
1628 push( _gvn.transform( new (C, 3) MulINode(a,b) ) ); | |
1629 break; | |
1630 case Bytecodes::_iadd: | |
1631 b = pop(); a = pop(); | |
1632 push( _gvn.transform( new (C, 3) AddINode(a,b) ) ); | |
1633 break; | |
1634 case Bytecodes::_ineg: | |
1635 a = pop(); | |
1636 push( _gvn.transform( new (C, 3) SubINode(_gvn.intcon(0),a)) ); | |
1637 break; | |
1638 case Bytecodes::_isub: | |
1639 b = pop(); a = pop(); | |
1640 push( _gvn.transform( new (C, 3) SubINode(a,b) ) ); | |
1641 break; | |
1642 case Bytecodes::_iand: | |
1643 b = pop(); a = pop(); | |
1644 push( _gvn.transform( new (C, 3) AndINode(a,b) ) ); | |
1645 break; | |
1646 case Bytecodes::_ior: | |
1647 b = pop(); a = pop(); | |
1648 push( _gvn.transform( new (C, 3) OrINode(a,b) ) ); | |
1649 break; | |
1650 case Bytecodes::_ixor: | |
1651 b = pop(); a = pop(); | |
1652 push( _gvn.transform( new (C, 3) XorINode(a,b) ) ); | |
1653 break; | |
1654 case Bytecodes::_ishl: | |
1655 b = pop(); a = pop(); | |
1656 push( _gvn.transform( new (C, 3) LShiftINode(a,b) ) ); | |
1657 break; | |
1658 case Bytecodes::_ishr: | |
1659 b = pop(); a = pop(); | |
1660 push( _gvn.transform( new (C, 3) RShiftINode(a,b) ) ); | |
1661 break; | |
1662 case Bytecodes::_iushr: | |
1663 b = pop(); a = pop(); | |
1664 push( _gvn.transform( new (C, 3) URShiftINode(a,b) ) ); | |
1665 break; | |
1666 | |
1667 case Bytecodes::_fneg: | |
1668 a = pop(); | |
1669 b = _gvn.transform(new (C, 2) NegFNode (a)); | |
1670 push(b); | |
1671 break; | |
1672 | |
1673 case Bytecodes::_fsub: | |
1674 b = pop(); | |
1675 a = pop(); | |
1676 c = _gvn.transform( new (C, 3) SubFNode(a,b) ); | |
1677 d = precision_rounding(c); | |
1678 push( d ); | |
1679 break; | |
1680 | |
1681 case Bytecodes::_fadd: | |
1682 b = pop(); | |
1683 a = pop(); | |
1684 c = _gvn.transform( new (C, 3) AddFNode(a,b) ); | |
1685 d = precision_rounding(c); | |
1686 push( d ); | |
1687 break; | |
1688 | |
1689 case Bytecodes::_fmul: | |
1690 b = pop(); | |
1691 a = pop(); | |
1692 c = _gvn.transform( new (C, 3) MulFNode(a,b) ); | |
1693 d = precision_rounding(c); | |
1694 push( d ); | |
1695 break; | |
1696 | |
1697 case Bytecodes::_fdiv: | |
1698 b = pop(); | |
1699 a = pop(); | |
1700 c = _gvn.transform( new (C, 3) DivFNode(0,a,b) ); | |
1701 d = precision_rounding(c); | |
1702 push( d ); | |
1703 break; | |
1704 | |
1705 case Bytecodes::_frem: | |
1706 if (Matcher::has_match_rule(Op_ModF)) { | |
1707 // Generate a ModF node. | |
1708 b = pop(); | |
1709 a = pop(); | |
1710 c = _gvn.transform( new (C, 3) ModFNode(0,a,b) ); | |
1711 d = precision_rounding(c); | |
1712 push( d ); | |
1713 } | |
1714 else { | |
1715 // Generate a call. | |
1716 modf(); | |
1717 } | |
1718 break; | |
1719 | |
1720 case Bytecodes::_fcmpl: | |
1721 b = pop(); | |
1722 a = pop(); | |
1723 c = _gvn.transform( new (C, 3) CmpF3Node( a, b)); | |
1724 push(c); | |
1725 break; | |
1726 case Bytecodes::_fcmpg: | |
1727 b = pop(); | |
1728 a = pop(); | |
1729 | |
1730 // Same as fcmpl but need to flip the unordered case. Swap the inputs, | |
1731 // which negates the result sign except for unordered. Flip the unordered | |
1732 // as well by using CmpF3 which implements unordered-lesser instead of | |
1733 // unordered-greater semantics. Finally, commute the result bits. Result | |
1734 // is same as using a CmpF3Greater except we did it with CmpF3 alone. | |
1735 c = _gvn.transform( new (C, 3) CmpF3Node( b, a)); | |
1736 c = _gvn.transform( new (C, 3) SubINode(_gvn.intcon(0),c) ); | |
1737 push(c); | |
1738 break; | |
1739 | |
1740 case Bytecodes::_f2i: | |
1741 a = pop(); | |
1742 push(_gvn.transform(new (C, 2) ConvF2INode(a))); | |
1743 break; | |
1744 | |
1745 case Bytecodes::_d2i: | |
1746 a = pop_pair(); | |
1747 b = _gvn.transform(new (C, 2) ConvD2INode(a)); | |
1748 push( b ); | |
1749 break; | |
1750 | |
1751 case Bytecodes::_f2d: | |
1752 a = pop(); | |
1753 b = _gvn.transform( new (C, 2) ConvF2DNode(a)); | |
1754 push_pair( b ); | |
1755 break; | |
1756 | |
1757 case Bytecodes::_d2f: | |
1758 a = pop_pair(); | |
1759 b = _gvn.transform( new (C, 2) ConvD2FNode(a)); | |
1760 // This breaks _227_mtrt (speed & correctness) and _222_mpegaudio (speed) | |
1761 //b = _gvn.transform(new (C, 2) RoundFloatNode(0, b) ); | |
1762 push( b ); | |
1763 break; | |
1764 | |
1765 case Bytecodes::_l2f: | |
1766 if (Matcher::convL2FSupported()) { | |
1767 a = pop_pair(); | |
1768 b = _gvn.transform( new (C, 2) ConvL2FNode(a)); | |
1769 // For i486.ad, FILD doesn't restrict precision to 24 or 53 bits. | |
1770 // Rather than storing the result into an FP register then pushing | |
1771 // out to memory to round, the machine instruction that implements | |
1772 // ConvL2D is responsible for rounding. | |
1773 // c = precision_rounding(b); | |
1774 c = _gvn.transform(b); | |
1775 push(c); | |
1776 } else { | |
1777 l2f(); | |
1778 } | |
1779 break; | |
1780 | |
1781 case Bytecodes::_l2d: | |
1782 a = pop_pair(); | |
1783 b = _gvn.transform( new (C, 2) ConvL2DNode(a)); | |
1784 // For i486.ad, rounding is always necessary (see _l2f above). | |
1785 // c = dprecision_rounding(b); | |
1786 c = _gvn.transform(b); | |
1787 push_pair(c); | |
1788 break; | |
1789 | |
1790 case Bytecodes::_f2l: | |
1791 a = pop(); | |
1792 b = _gvn.transform( new (C, 2) ConvF2LNode(a)); | |
1793 push_pair(b); | |
1794 break; | |
1795 | |
1796 case Bytecodes::_d2l: | |
1797 a = pop_pair(); | |
1798 b = _gvn.transform( new (C, 2) ConvD2LNode(a)); | |
1799 push_pair(b); | |
1800 break; | |
1801 | |
1802 case Bytecodes::_dsub: | |
1803 b = pop_pair(); | |
1804 a = pop_pair(); | |
1805 c = _gvn.transform( new (C, 3) SubDNode(a,b) ); | |
1806 d = dprecision_rounding(c); | |
1807 push_pair( d ); | |
1808 break; | |
1809 | |
1810 case Bytecodes::_dadd: | |
1811 b = pop_pair(); | |
1812 a = pop_pair(); | |
1813 c = _gvn.transform( new (C, 3) AddDNode(a,b) ); | |
1814 d = dprecision_rounding(c); | |
1815 push_pair( d ); | |
1816 break; | |
1817 | |
1818 case Bytecodes::_dmul: | |
1819 b = pop_pair(); | |
1820 a = pop_pair(); | |
1821 c = _gvn.transform( new (C, 3) MulDNode(a,b) ); | |
1822 d = dprecision_rounding(c); | |
1823 push_pair( d ); | |
1824 break; | |
1825 | |
1826 case Bytecodes::_ddiv: | |
1827 b = pop_pair(); | |
1828 a = pop_pair(); | |
1829 c = _gvn.transform( new (C, 3) DivDNode(0,a,b) ); | |
1830 d = dprecision_rounding(c); | |
1831 push_pair( d ); | |
1832 break; | |
1833 | |
1834 case Bytecodes::_dneg: | |
1835 a = pop_pair(); | |
1836 b = _gvn.transform(new (C, 2) NegDNode (a)); | |
1837 push_pair(b); | |
1838 break; | |
1839 | |
1840 case Bytecodes::_drem: | |
1841 if (Matcher::has_match_rule(Op_ModD)) { | |
1842 // Generate a ModD node. | |
1843 b = pop_pair(); | |
1844 a = pop_pair(); | |
1845 // a % b | |
1846 | |
1847 c = _gvn.transform( new (C, 3) ModDNode(0,a,b) ); | |
1848 d = dprecision_rounding(c); | |
1849 push_pair( d ); | |
1850 } | |
1851 else { | |
1852 // Generate a call. | |
1853 modd(); | |
1854 } | |
1855 break; | |
1856 | |
1857 case Bytecodes::_dcmpl: | |
1858 b = pop_pair(); | |
1859 a = pop_pair(); | |
1860 c = _gvn.transform( new (C, 3) CmpD3Node( a, b)); | |
1861 push(c); | |
1862 break; | |
1863 | |
1864 case Bytecodes::_dcmpg: | |
1865 b = pop_pair(); | |
1866 a = pop_pair(); | |
1867 // Same as dcmpl but need to flip the unordered case. | |
1868 // Commute the inputs, which negates the result sign except for unordered. | |
1869 // Flip the unordered as well by using CmpD3 which implements | |
1870 // unordered-lesser instead of unordered-greater semantics. | |
1871 // Finally, negate the result bits. Result is same as using a | |
1872 // CmpD3Greater except we did it with CmpD3 alone. | |
1873 c = _gvn.transform( new (C, 3) CmpD3Node( b, a)); | |
1874 c = _gvn.transform( new (C, 3) SubINode(_gvn.intcon(0),c) ); | |
1875 push(c); | |
1876 break; | |
1877 | |
1878 | |
1879 // Note for longs -> lo word is on TOS, hi word is on TOS - 1 | |
1880 case Bytecodes::_land: | |
1881 b = pop_pair(); | |
1882 a = pop_pair(); | |
1883 c = _gvn.transform( new (C, 3) AndLNode(a,b) ); | |
1884 push_pair(c); | |
1885 break; | |
1886 case Bytecodes::_lor: | |
1887 b = pop_pair(); | |
1888 a = pop_pair(); | |
1889 c = _gvn.transform( new (C, 3) OrLNode(a,b) ); | |
1890 push_pair(c); | |
1891 break; | |
1892 case Bytecodes::_lxor: | |
1893 b = pop_pair(); | |
1894 a = pop_pair(); | |
1895 c = _gvn.transform( new (C, 3) XorLNode(a,b) ); | |
1896 push_pair(c); | |
1897 break; | |
1898 | |
1899 case Bytecodes::_lshl: | |
1900 b = pop(); // the shift count | |
1901 a = pop_pair(); // value to be shifted | |
1902 c = _gvn.transform( new (C, 3) LShiftLNode(a,b) ); | |
1903 push_pair(c); | |
1904 break; | |
1905 case Bytecodes::_lshr: | |
1906 b = pop(); // the shift count | |
1907 a = pop_pair(); // value to be shifted | |
1908 c = _gvn.transform( new (C, 3) RShiftLNode(a,b) ); | |
1909 push_pair(c); | |
1910 break; | |
1911 case Bytecodes::_lushr: | |
1912 b = pop(); // the shift count | |
1913 a = pop_pair(); // value to be shifted | |
1914 c = _gvn.transform( new (C, 3) URShiftLNode(a,b) ); | |
1915 push_pair(c); | |
1916 break; | |
1917 case Bytecodes::_lmul: | |
1918 b = pop_pair(); | |
1919 a = pop_pair(); | |
1920 c = _gvn.transform( new (C, 3) MulLNode(a,b) ); | |
1921 push_pair(c); | |
1922 break; | |
1923 | |
1924 case Bytecodes::_lrem: | |
1925 // Must keep both values on the expression-stack during null-check | |
1926 assert(peek(0) == top(), "long word order"); | |
1927 do_null_check(peek(1), T_LONG); | |
1928 // Compile-time detect of null-exception? | |
1929 if (stopped()) return; | |
1930 b = pop_pair(); | |
1931 a = pop_pair(); | |
1932 c = _gvn.transform( new (C, 3) ModLNode(control(),a,b) ); | |
1933 push_pair(c); | |
1934 break; | |
1935 | |
1936 case Bytecodes::_ldiv: | |
1937 // Must keep both values on the expression-stack during null-check | |
1938 assert(peek(0) == top(), "long word order"); | |
1939 do_null_check(peek(1), T_LONG); | |
1940 // Compile-time detect of null-exception? | |
1941 if (stopped()) return; | |
1942 b = pop_pair(); | |
1943 a = pop_pair(); | |
1944 c = _gvn.transform( new (C, 3) DivLNode(control(),a,b) ); | |
1945 push_pair(c); | |
1946 break; | |
1947 | |
1948 case Bytecodes::_ladd: | |
1949 b = pop_pair(); | |
1950 a = pop_pair(); | |
1951 c = _gvn.transform( new (C, 3) AddLNode(a,b) ); | |
1952 push_pair(c); | |
1953 break; | |
1954 case Bytecodes::_lsub: | |
1955 b = pop_pair(); | |
1956 a = pop_pair(); | |
1957 c = _gvn.transform( new (C, 3) SubLNode(a,b) ); | |
1958 push_pair(c); | |
1959 break; | |
1960 case Bytecodes::_lcmp: | |
1961 // Safepoints are now inserted _before_ branches. The long-compare | |
1962 // bytecode painfully produces a 3-way value (-1,0,+1) which requires a | |
1963 // slew of control flow. These are usually followed by a CmpI vs zero and | |
1964 // a branch; this pattern then optimizes to the obvious long-compare and | |
1965 // branch. However, if the branch is backwards there's a Safepoint | |
1966 // inserted. The inserted Safepoint captures the JVM state at the | |
1967 // pre-branch point, i.e. it captures the 3-way value. Thus if a | |
1968 // long-compare is used to control a loop the debug info will force | |
1969 // computation of the 3-way value, even though the generated code uses a | |
1970 // long-compare and branch. We try to rectify the situation by inserting | |
1971 // a SafePoint here and have it dominate and kill the safepoint added at a | |
1972 // following backwards branch. At this point the JVM state merely holds 2 | |
1973 // longs but not the 3-way value. | |
1974 if( UseLoopSafepoints ) { | |
1975 switch( iter().next_bc() ) { | |
1976 case Bytecodes::_ifgt: | |
1977 case Bytecodes::_iflt: | |
1978 case Bytecodes::_ifge: | |
1979 case Bytecodes::_ifle: | |
1980 case Bytecodes::_ifne: | |
1981 case Bytecodes::_ifeq: | |
1982 // If this is a backwards branch in the bytecodes, add Safepoint | |
1983 maybe_add_safepoint(iter().next_get_dest()); | |
1984 } | |
1985 } | |
1986 b = pop_pair(); | |
1987 a = pop_pair(); | |
1988 c = _gvn.transform( new (C, 3) CmpL3Node( a, b )); | |
1989 push(c); | |
1990 break; | |
1991 | |
1992 case Bytecodes::_lneg: | |
1993 a = pop_pair(); | |
1994 b = _gvn.transform( new (C, 3) SubLNode(longcon(0),a)); | |
1995 push_pair(b); | |
1996 break; | |
1997 case Bytecodes::_l2i: | |
1998 a = pop_pair(); | |
1999 push( _gvn.transform( new (C, 2) ConvL2INode(a))); | |
2000 break; | |
2001 case Bytecodes::_i2l: | |
2002 a = pop(); | |
2003 b = _gvn.transform( new (C, 2) ConvI2LNode(a)); | |
2004 push_pair(b); | |
2005 break; | |
2006 case Bytecodes::_i2b: | |
2007 // Sign extend | |
2008 a = pop(); | |
2009 a = _gvn.transform( new (C, 3) LShiftINode(a,_gvn.intcon(24)) ); | |
2010 a = _gvn.transform( new (C, 3) RShiftINode(a,_gvn.intcon(24)) ); | |
2011 push( a ); | |
2012 break; | |
2013 case Bytecodes::_i2s: | |
2014 a = pop(); | |
2015 a = _gvn.transform( new (C, 3) LShiftINode(a,_gvn.intcon(16)) ); | |
2016 a = _gvn.transform( new (C, 3) RShiftINode(a,_gvn.intcon(16)) ); | |
2017 push( a ); | |
2018 break; | |
2019 case Bytecodes::_i2c: | |
2020 a = pop(); | |
2021 push( _gvn.transform( new (C, 3) AndINode(a,_gvn.intcon(0xFFFF)) ) ); | |
2022 break; | |
2023 | |
2024 case Bytecodes::_i2f: | |
2025 a = pop(); | |
2026 b = _gvn.transform( new (C, 2) ConvI2FNode(a) ) ; | |
2027 c = precision_rounding(b); | |
2028 push (b); | |
2029 break; | |
2030 | |
2031 case Bytecodes::_i2d: | |
2032 a = pop(); | |
2033 b = _gvn.transform( new (C, 2) ConvI2DNode(a)); | |
2034 push_pair(b); | |
2035 break; | |
2036 | |
2037 case Bytecodes::_iinc: // Increment local | |
2038 i = iter().get_index(); // Get local index | |
2039 set_local( i, _gvn.transform( new (C, 3) AddINode( _gvn.intcon(iter().get_iinc_con()), local(i) ) ) ); | |
2040 break; | |
2041 | |
2042 // Exit points of synchronized methods must have an unlock node | |
2043 case Bytecodes::_return: | |
2044 return_current(NULL); | |
2045 break; | |
2046 | |
2047 case Bytecodes::_ireturn: | |
2048 case Bytecodes::_areturn: | |
2049 case Bytecodes::_freturn: | |
2050 return_current(pop()); | |
2051 break; | |
2052 case Bytecodes::_lreturn: | |
2053 return_current(pop_pair()); | |
2054 break; | |
2055 case Bytecodes::_dreturn: | |
2056 return_current(pop_pair()); | |
2057 break; | |
2058 | |
2059 case Bytecodes::_athrow: | |
2060 // null exception oop throws NULL pointer exception | |
2061 do_null_check(peek(), T_OBJECT); | |
2062 if (stopped()) return; | |
2063 if (JvmtiExport::can_post_exceptions()) { | |
2064 // "Full-speed throwing" is not necessary here, | |
2065 // since we're notifying the VM on every throw. | |
2066 uncommon_trap(Deoptimization::Reason_unhandled, | |
2067 Deoptimization::Action_none); | |
2068 return; | |
2069 } | |
2070 // Hook the thrown exception directly to subsequent handlers. | |
2071 if (BailoutToInterpreterForThrows) { | |
2072 // Keep method interpreted from now on. | |
2073 uncommon_trap(Deoptimization::Reason_unhandled, | |
2074 Deoptimization::Action_make_not_compilable); | |
2075 return; | |
2076 } | |
2077 add_exception_state(make_exception_state(peek())); | |
2078 break; | |
2079 | |
2080 case Bytecodes::_goto: // fall through | |
2081 case Bytecodes::_goto_w: { | |
2082 int target_bci = (bc() == Bytecodes::_goto) ? iter().get_dest() : iter().get_far_dest(); | |
2083 | |
2084 // If this is a backwards branch in the bytecodes, add Safepoint | |
2085 maybe_add_safepoint(target_bci); | |
2086 | |
2087 // Update method data | |
2088 profile_taken_branch(target_bci); | |
2089 | |
2090 // Merge the current control into the target basic block | |
2091 merge(target_bci); | |
2092 | |
2093 // See if we can get some profile data and hand it off to the next block | |
2094 Block *target_block = block()->successor_for_bci(target_bci); | |
2095 if (target_block->pred_count() != 1) break; | |
2096 ciMethodData* methodData = method()->method_data(); | |
2097 if (!methodData->is_mature()) break; | |
2098 ciProfileData* data = methodData->bci_to_data(bci()); | |
2099 assert( data->is_JumpData(), "" ); | |
2100 int taken = ((ciJumpData*)data)->taken(); | |
2101 taken = method()->scale_count(taken); | |
2102 target_block->set_count(taken); | |
2103 break; | |
2104 } | |
2105 | |
2106 case Bytecodes::_ifnull: | |
2107 do_ifnull(BoolTest::eq); | |
2108 break; | |
2109 case Bytecodes::_ifnonnull: | |
2110 do_ifnull(BoolTest::ne); | |
2111 break; | |
2112 | |
2113 case Bytecodes::_if_acmpeq: btest = BoolTest::eq; goto handle_if_acmp; | |
2114 case Bytecodes::_if_acmpne: btest = BoolTest::ne; goto handle_if_acmp; | |
2115 handle_if_acmp: | |
2116 // If this is a backwards branch in the bytecodes, add Safepoint | |
2117 maybe_add_safepoint(iter().get_dest()); | |
2118 a = pop(); | |
2119 b = pop(); | |
2120 c = _gvn.transform( new (C, 3) CmpPNode(b, a) ); | |
2121 do_if(btest, c); | |
2122 break; | |
2123 | |
2124 case Bytecodes::_ifeq: btest = BoolTest::eq; goto handle_ifxx; | |
2125 case Bytecodes::_ifne: btest = BoolTest::ne; goto handle_ifxx; | |
2126 case Bytecodes::_iflt: btest = BoolTest::lt; goto handle_ifxx; | |
2127 case Bytecodes::_ifle: btest = BoolTest::le; goto handle_ifxx; | |
2128 case Bytecodes::_ifgt: btest = BoolTest::gt; goto handle_ifxx; | |
2129 case Bytecodes::_ifge: btest = BoolTest::ge; goto handle_ifxx; | |
2130 handle_ifxx: | |
2131 // If this is a backwards branch in the bytecodes, add Safepoint | |
2132 maybe_add_safepoint(iter().get_dest()); | |
2133 a = _gvn.intcon(0); | |
2134 b = pop(); | |
2135 c = _gvn.transform( new (C, 3) CmpINode(b, a) ); | |
2136 do_if(btest, c); | |
2137 break; | |
2138 | |
2139 case Bytecodes::_if_icmpeq: btest = BoolTest::eq; goto handle_if_icmp; | |
2140 case Bytecodes::_if_icmpne: btest = BoolTest::ne; goto handle_if_icmp; | |
2141 case Bytecodes::_if_icmplt: btest = BoolTest::lt; goto handle_if_icmp; | |
2142 case Bytecodes::_if_icmple: btest = BoolTest::le; goto handle_if_icmp; | |
2143 case Bytecodes::_if_icmpgt: btest = BoolTest::gt; goto handle_if_icmp; | |
2144 case Bytecodes::_if_icmpge: btest = BoolTest::ge; goto handle_if_icmp; | |
2145 handle_if_icmp: | |
2146 // If this is a backwards branch in the bytecodes, add Safepoint | |
2147 maybe_add_safepoint(iter().get_dest()); | |
2148 a = pop(); | |
2149 b = pop(); | |
2150 c = _gvn.transform( new (C, 3) CmpINode( b, a ) ); | |
2151 do_if(btest, c); | |
2152 break; | |
2153 | |
2154 case Bytecodes::_tableswitch: | |
2155 do_tableswitch(); | |
2156 break; | |
2157 | |
2158 case Bytecodes::_lookupswitch: | |
2159 do_lookupswitch(); | |
2160 break; | |
2161 | |
2162 case Bytecodes::_invokestatic: | |
2163 case Bytecodes::_invokespecial: | |
2164 case Bytecodes::_invokevirtual: | |
2165 case Bytecodes::_invokeinterface: | |
2166 do_call(); | |
2167 break; | |
2168 case Bytecodes::_checkcast: | |
2169 do_checkcast(); | |
2170 break; | |
2171 case Bytecodes::_instanceof: | |
2172 do_instanceof(); | |
2173 break; | |
2174 case Bytecodes::_anewarray: | |
2175 do_anewarray(); | |
2176 break; | |
2177 case Bytecodes::_newarray: | |
2178 do_newarray((BasicType)iter().get_index()); | |
2179 break; | |
2180 case Bytecodes::_multianewarray: | |
2181 do_multianewarray(); | |
2182 break; | |
2183 case Bytecodes::_new: | |
2184 do_new(); | |
2185 break; | |
2186 | |
2187 case Bytecodes::_jsr: | |
2188 case Bytecodes::_jsr_w: | |
2189 do_jsr(); | |
2190 break; | |
2191 | |
2192 case Bytecodes::_ret: | |
2193 do_ret(); | |
2194 break; | |
2195 | |
2196 | |
2197 case Bytecodes::_monitorenter: | |
2198 do_monitor_enter(); | |
2199 break; | |
2200 | |
2201 case Bytecodes::_monitorexit: | |
2202 do_monitor_exit(); | |
2203 break; | |
2204 | |
2205 case Bytecodes::_breakpoint: | |
2206 // Breakpoint set concurrently to compile | |
2207 // %%% use an uncommon trap? | |
2208 C->record_failure("breakpoint in method"); | |
2209 return; | |
2210 | |
2211 default: | |
2212 #ifndef PRODUCT | |
2213 map()->dump(99); | |
2214 #endif | |
2215 tty->print("\nUnhandled bytecode %s\n", Bytecodes::name(bc()) ); | |
2216 ShouldNotReachHere(); | |
2217 } | |
2218 | |
2219 #ifndef PRODUCT | |
2220 IdealGraphPrinter *printer = IdealGraphPrinter::printer(); | |
2221 if(printer) { | |
2222 char buffer[256]; | |
2223 sprintf(buffer, "Bytecode %d: %s", bci(), Bytecodes::name(bc())); | |
2224 bool old = printer->traverse_outs(); | |
2225 printer->set_traverse_outs(true); | |
2226 printer->print_method(C, buffer, 3); | |
2227 printer->set_traverse_outs(old); | |
2228 } | |
2229 #endif | |
2230 } |