Mercurial > hg > graal-compiler
annotate src/share/vm/c1/c1_GraphBuilder.hpp @ 17936:968a17f18337
8042786: Proper fix for 8032566
Summary: Check for overflow cases in range checks and collapse it if we can.
Reviewed-by: jrose, iveresov
author | kvn |
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date | Fri, 16 May 2014 12:05:14 -0700 |
parents | 45e59fae8f2b |
children | 52b4284cb496 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_C1_C1_GRAPHBUILDER_HPP |
26 #define SHARE_VM_C1_C1_GRAPHBUILDER_HPP | |
27 | |
28 #include "c1/c1_IR.hpp" | |
29 #include "c1/c1_Instruction.hpp" | |
30 #include "c1/c1_ValueMap.hpp" | |
31 #include "c1/c1_ValueStack.hpp" | |
32 #include "ci/ciMethodData.hpp" | |
33 #include "ci/ciStreams.hpp" | |
6843 | 34 #include "compiler/compileLog.hpp" |
1972 | 35 |
0 | 36 class MemoryBuffer; |
37 | |
38 class GraphBuilder VALUE_OBJ_CLASS_SPEC { | |
39 private: | |
40 // Per-scope data. These are pushed and popped as we descend into | |
41 // inlined methods. Currently in order to generate good code in the | |
42 // inliner we have to attempt to inline methods directly into the | |
43 // basic block we are parsing; this adds complexity. | |
44 class ScopeData: public CompilationResourceObj { | |
45 private: | |
46 ScopeData* _parent; | |
47 // bci-to-block mapping | |
48 BlockList* _bci2block; | |
49 // Scope | |
50 IRScope* _scope; | |
51 // Whether this scope or any parent scope has exception handlers | |
52 bool _has_handler; | |
53 // The bytecodes | |
54 ciBytecodeStream* _stream; | |
55 | |
56 // Work list | |
57 BlockList* _work_list; | |
58 | |
59 // Maximum inline size for this scope | |
60 intx _max_inline_size; | |
61 // Expression stack depth at point where inline occurred | |
62 int _caller_stack_size; | |
63 | |
64 // The continuation point for the inline. Currently only used in | |
65 // multi-block inlines, but eventually would like to use this for | |
66 // all inlines for uniformity and simplicity; in this case would | |
67 // get the continuation point from the BlockList instead of | |
68 // fabricating it anew because Invokes would be considered to be | |
69 // BlockEnds. | |
70 BlockBegin* _continuation; | |
71 | |
72 // Was this ScopeData created only for the parsing and inlining of | |
73 // a jsr? | |
74 bool _parsing_jsr; | |
75 // We track the destination bci of the jsr only to determine | |
76 // bailout conditions, since we only handle a subset of all of the | |
77 // possible jsr-ret control structures. Recursive invocations of a | |
78 // jsr are disallowed by the verifier. | |
79 int _jsr_entry_bci; | |
80 // We need to track the local variable in which the return address | |
81 // was stored to ensure we can handle inlining the jsr, because we | |
82 // don't handle arbitrary jsr/ret constructs. | |
83 int _jsr_ret_addr_local; | |
84 // If we are parsing a jsr, the continuation point for rets | |
85 BlockBegin* _jsr_continuation; | |
86 // Cloned XHandlers for jsr-related ScopeDatas | |
87 XHandlers* _jsr_xhandlers; | |
88 | |
89 // Number of returns seen in this scope | |
90 int _num_returns; | |
91 | |
92 // In order to generate profitable code for inlining, we currently | |
93 // have to perform an optimization for single-block inlined | |
94 // methods where we continue parsing into the same block. This | |
95 // allows us to perform CSE across inlined scopes and to avoid | |
96 // storing parameters to the stack. Having a global register | |
97 // allocator and being able to perform global CSE would allow this | |
98 // code to be removed and thereby simplify the inliner. | |
99 BlockBegin* _cleanup_block; // The block to which the return was added | |
100 Instruction* _cleanup_return_prev; // Instruction before return instruction | |
101 ValueStack* _cleanup_state; // State of that block (not yet pinned) | |
102 | |
103 public: | |
104 ScopeData(ScopeData* parent); | |
105 | |
106 ScopeData* parent() const { return _parent; } | |
107 | |
108 BlockList* bci2block() const { return _bci2block; } | |
109 void set_bci2block(BlockList* bci2block) { _bci2block = bci2block; } | |
110 | |
111 // NOTE: this has a different effect when parsing jsrs | |
112 BlockBegin* block_at(int bci); | |
113 | |
114 IRScope* scope() const { return _scope; } | |
115 // Has side-effect of setting has_handler flag | |
116 void set_scope(IRScope* scope); | |
117 | |
118 // Whether this or any parent scope has exception handlers | |
119 bool has_handler() const { return _has_handler; } | |
120 void set_has_handler() { _has_handler = true; } | |
121 | |
122 // Exception handlers list to be used for this scope | |
123 XHandlers* xhandlers() const; | |
124 | |
125 // How to get a block to be parsed | |
126 void add_to_work_list(BlockBegin* block); | |
127 // How to remove the next block to be parsed; returns NULL if none left | |
128 BlockBegin* remove_from_work_list(); | |
129 // Indicates parse is over | |
130 bool is_work_list_empty() const; | |
131 | |
132 ciBytecodeStream* stream() { return _stream; } | |
133 void set_stream(ciBytecodeStream* stream) { _stream = stream; } | |
134 | |
135 intx max_inline_size() const { return _max_inline_size; } | |
136 | |
137 BlockBegin* continuation() const { return _continuation; } | |
138 void set_continuation(BlockBegin* cont) { _continuation = cont; } | |
139 | |
140 // Indicates whether this ScopeData was pushed only for the | |
141 // parsing and inlining of a jsr | |
142 bool parsing_jsr() const { return _parsing_jsr; } | |
143 void set_parsing_jsr() { _parsing_jsr = true; } | |
144 int jsr_entry_bci() const { return _jsr_entry_bci; } | |
145 void set_jsr_entry_bci(int bci) { _jsr_entry_bci = bci; } | |
146 void set_jsr_return_address_local(int local_no){ _jsr_ret_addr_local = local_no; } | |
147 int jsr_return_address_local() const { return _jsr_ret_addr_local; } | |
148 // Must be called after scope is set up for jsr ScopeData | |
149 void setup_jsr_xhandlers(); | |
150 | |
151 // The jsr continuation is only used when parsing_jsr is true, and | |
152 // is different from the "normal" continuation since we can end up | |
153 // doing a return (rather than a ret) from within a subroutine | |
154 BlockBegin* jsr_continuation() const { return _jsr_continuation; } | |
155 void set_jsr_continuation(BlockBegin* cont) { _jsr_continuation = cont; } | |
156 | |
157 int num_returns(); | |
158 void incr_num_returns(); | |
159 | |
160 void set_inline_cleanup_info(BlockBegin* block, | |
161 Instruction* return_prev, | |
162 ValueStack* return_state); | |
163 BlockBegin* inline_cleanup_block() const { return _cleanup_block; } | |
164 Instruction* inline_cleanup_return_prev() const{ return _cleanup_return_prev; } | |
165 ValueStack* inline_cleanup_state() const { return _cleanup_state; } | |
166 }; | |
167 | |
168 // for all GraphBuilders | |
169 static bool _can_trap[Bytecodes::number_of_java_codes]; | |
170 | |
171 // for each instance of GraphBuilder | |
172 ScopeData* _scope_data; // Per-scope data; used for inlining | |
173 Compilation* _compilation; // the current compilation | |
174 ValueMap* _vmap; // the map of values encountered (for CSE) | |
175 MemoryBuffer* _memory; | |
176 const char* _inline_bailout_msg; // non-null if most recent inline attempt failed | |
177 int _instruction_count; // for bailing out in pathological jsr/ret cases | |
178 BlockBegin* _start; // the start block | |
179 BlockBegin* _osr_entry; // the osr entry block block | |
180 ValueStack* _initial_state; // The state for the start block | |
181 | |
182 // for each call to connect_to_end; can also be set by inliner | |
183 BlockBegin* _block; // the current block | |
184 ValueStack* _state; // the current execution state | |
185 Instruction* _last; // the last instruction added | |
186 bool _skip_block; // skip processing of the rest of this block | |
187 | |
188 // accessors | |
189 ScopeData* scope_data() const { return _scope_data; } | |
190 Compilation* compilation() const { return _compilation; } | |
191 BlockList* bci2block() const { return scope_data()->bci2block(); } | |
192 ValueMap* vmap() const { assert(UseLocalValueNumbering, "should not access otherwise"); return _vmap; } | |
193 bool has_handler() const { return scope_data()->has_handler(); } | |
194 | |
195 BlockBegin* block() const { return _block; } | |
196 ValueStack* state() const { return _state; } | |
197 void set_state(ValueStack* state) { _state = state; } | |
198 IRScope* scope() const { return scope_data()->scope(); } | |
199 ciMethod* method() const { return scope()->method(); } | |
200 ciBytecodeStream* stream() const { return scope_data()->stream(); } | |
201 Instruction* last() const { return _last; } | |
202 Bytecodes::Code code() const { return stream()->cur_bc(); } | |
203 int bci() const { return stream()->cur_bci(); } | |
204 int next_bci() const { return stream()->next_bci(); } | |
205 | |
206 // unified bailout support | |
207 void bailout(const char* msg) const { compilation()->bailout(msg); } | |
208 bool bailed_out() const { return compilation()->bailed_out(); } | |
209 | |
210 // stack manipulation helpers | |
211 void ipush(Value t) const { state()->ipush(t); } | |
212 void lpush(Value t) const { state()->lpush(t); } | |
213 void fpush(Value t) const { state()->fpush(t); } | |
214 void dpush(Value t) const { state()->dpush(t); } | |
215 void apush(Value t) const { state()->apush(t); } | |
216 void push(ValueType* type, Value t) const { state()-> push(type, t); } | |
217 | |
218 Value ipop() { return state()->ipop(); } | |
219 Value lpop() { return state()->lpop(); } | |
220 Value fpop() { return state()->fpop(); } | |
221 Value dpop() { return state()->dpop(); } | |
222 Value apop() { return state()->apop(); } | |
223 Value pop(ValueType* type) { return state()-> pop(type); } | |
224 | |
225 // instruction helpers | |
226 void load_constant(); | |
227 void load_local(ValueType* type, int index); | |
228 void store_local(ValueType* type, int index); | |
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229 void store_local(ValueStack* state, Value value, int index); |
0 | 230 void load_indexed (BasicType type); |
231 void store_indexed(BasicType type); | |
232 void stack_op(Bytecodes::Code code); | |
1819 | 233 void arithmetic_op(ValueType* type, Bytecodes::Code code, ValueStack* state_before = NULL); |
0 | 234 void negate_op(ValueType* type); |
235 void shift_op(ValueType* type, Bytecodes::Code code); | |
236 void logic_op(ValueType* type, Bytecodes::Code code); | |
237 void compare_op(ValueType* type, Bytecodes::Code code); | |
238 void convert(Bytecodes::Code op, BasicType from, BasicType to); | |
239 void increment(); | |
240 void _goto(int from_bci, int to_bci); | |
241 void if_node(Value x, If::Condition cond, Value y, ValueStack* stack_before); | |
242 void if_zero(ValueType* type, If::Condition cond); | |
243 void if_null(ValueType* type, If::Condition cond); | |
244 void if_same(ValueType* type, If::Condition cond); | |
245 void jsr(int dest); | |
246 void ret(int local_index); | |
247 void table_switch(); | |
248 void lookup_switch(); | |
249 void method_return(Value x); | |
250 void call_register_finalizer(); | |
251 void access_field(Bytecodes::Code code); | |
252 void invoke(Bytecodes::Code code); | |
253 void new_instance(int klass_index); | |
254 void new_type_array(); | |
255 void new_object_array(); | |
256 void check_cast(int klass_index); | |
257 void instance_of(int klass_index); | |
258 void monitorenter(Value x, int bci); | |
259 void monitorexit(Value x, int bci); | |
260 void new_multi_array(int dimensions); | |
261 void throw_op(int bci); | |
262 Value round_fp(Value fp_value); | |
263 | |
264 // stack/code manipulation helpers | |
265 Instruction* append_with_bci(Instruction* instr, int bci); | |
266 Instruction* append(Instruction* instr); | |
267 Instruction* append_split(StateSplit* instr); | |
268 | |
269 // other helpers | |
270 BlockBegin* block_at(int bci) { return scope_data()->block_at(bci); } | |
1819 | 271 XHandlers* handle_exception(Instruction* instruction); |
0 | 272 void connect_to_end(BlockBegin* beg); |
273 void null_check(Value value); | |
274 void eliminate_redundant_phis(BlockBegin* start); | |
275 BlockEnd* iterate_bytecodes_for_block(int bci); | |
276 void iterate_all_blocks(bool start_in_current_block_for_inlining = false); | |
277 Dependencies* dependency_recorder() const; // = compilation()->dependencies() | |
278 bool direct_compare(ciKlass* k); | |
279 | |
280 void kill_all(); | |
281 | |
1819 | 282 // use of state copy routines (try to minimize unnecessary state |
283 // object allocations): | |
284 | |
285 // - if the instruction unconditionally needs a full copy of the | |
286 // state (for patching for example), then use copy_state_before* | |
287 | |
288 // - if the instruction needs a full copy of the state only for | |
289 // handler generation (Instruction::needs_exception_state() returns | |
290 // false) then use copy_state_exhandling* | |
291 | |
292 // - if the instruction needs either a full copy of the state for | |
293 // handler generation and a least a minimal copy of the state (as | |
294 // returned by Instruction::exception_state()) for debug info | |
295 // generation (that is when Instruction::needs_exception_state() | |
296 // returns true) then use copy_state_for_exception* | |
297 | |
298 ValueStack* copy_state_before_with_bci(int bci); | |
299 ValueStack* copy_state_before(); | |
300 ValueStack* copy_state_exhandling_with_bci(int bci); | |
301 ValueStack* copy_state_exhandling(); | |
302 ValueStack* copy_state_for_exception_with_bci(int bci); | |
303 ValueStack* copy_state_for_exception(); | |
8860 | 304 ValueStack* copy_state_if_bb(bool is_bb) { return (is_bb || compilation()->is_optimistic()) ? copy_state_before() : NULL; } |
305 ValueStack* copy_state_indexed_access() { return compilation()->is_optimistic() ? copy_state_before() : copy_state_for_exception(); } | |
0 | 306 |
307 // | |
308 // Inlining support | |
309 // | |
310 | |
311 // accessors | |
312 bool parsing_jsr() const { return scope_data()->parsing_jsr(); } | |
313 BlockBegin* continuation() const { return scope_data()->continuation(); } | |
314 BlockBegin* jsr_continuation() const { return scope_data()->jsr_continuation(); } | |
315 void set_continuation(BlockBegin* continuation) { scope_data()->set_continuation(continuation); } | |
316 void set_inline_cleanup_info(BlockBegin* block, | |
317 Instruction* return_prev, | |
318 ValueStack* return_state) { scope_data()->set_inline_cleanup_info(block, | |
319 return_prev, | |
320 return_state); } | |
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321 void set_inline_cleanup_info() { |
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322 set_inline_cleanup_info(_block, _last, _state); |
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323 } |
0 | 324 BlockBegin* inline_cleanup_block() const { return scope_data()->inline_cleanup_block(); } |
325 Instruction* inline_cleanup_return_prev() const { return scope_data()->inline_cleanup_return_prev(); } | |
326 ValueStack* inline_cleanup_state() const { return scope_data()->inline_cleanup_state(); } | |
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327 void restore_inline_cleanup_info() { |
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328 _block = inline_cleanup_block(); |
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329 _last = inline_cleanup_return_prev(); |
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330 _state = inline_cleanup_state(); |
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331 } |
0 | 332 void incr_num_returns() { scope_data()->incr_num_returns(); } |
333 int num_returns() const { return scope_data()->num_returns(); } | |
334 intx max_inline_size() const { return scope_data()->max_inline_size(); } | |
335 int inline_level() const { return scope()->level(); } | |
336 int recursive_inline_level(ciMethod* callee) const; | |
337 | |
338 // inlining of synchronized methods | |
339 void inline_sync_entry(Value lock, BlockBegin* sync_handler); | |
340 void fill_sync_handler(Value lock, BlockBegin* sync_handler, bool default_handler = false); | |
341 | |
342 // inliners | |
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343 bool try_inline( ciMethod* callee, bool holder_known, Bytecodes::Code bc = Bytecodes::_illegal, Value receiver = NULL); |
0 | 344 bool try_inline_intrinsics(ciMethod* callee); |
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345 bool try_inline_full( ciMethod* callee, bool holder_known, Bytecodes::Code bc = Bytecodes::_illegal, Value receiver = NULL); |
0 | 346 bool try_inline_jsr(int jsr_dest_bci); |
347 | |
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348 const char* check_can_parse(ciMethod* callee) const; |
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349 const char* should_not_inline(ciMethod* callee) const; |
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350 |
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351 // JSR 292 support |
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352 bool try_method_handle_inline(ciMethod* callee); |
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353 |
0 | 354 // helpers |
355 void inline_bailout(const char* msg); | |
356 BlockBegin* header_block(BlockBegin* entry, BlockBegin::Flag f, ValueStack* state); | |
357 BlockBegin* setup_start_block(int osr_bci, BlockBegin* std_entry, BlockBegin* osr_entry, ValueStack* init_state); | |
358 void setup_osr_entry_block(); | |
359 void clear_inline_bailout(); | |
360 ValueStack* state_at_entry(); | |
361 void push_root_scope(IRScope* scope, BlockList* bci2block, BlockBegin* start); | |
362 void push_scope(ciMethod* callee, BlockBegin* continuation); | |
363 void push_scope_for_jsr(BlockBegin* jsr_continuation, int jsr_dest_bci); | |
364 void pop_scope(); | |
365 void pop_scope_for_jsr(); | |
366 | |
367 bool append_unsafe_get_obj(ciMethod* callee, BasicType t, bool is_volatile); | |
368 bool append_unsafe_put_obj(ciMethod* callee, BasicType t, bool is_volatile); | |
369 bool append_unsafe_get_raw(ciMethod* callee, BasicType t); | |
370 bool append_unsafe_put_raw(ciMethod* callee, BasicType t); | |
371 bool append_unsafe_prefetch(ciMethod* callee, bool is_store, bool is_static); | |
372 void append_unsafe_CAS(ciMethod* callee); | |
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373 bool append_unsafe_get_and_set_obj(ciMethod* callee, bool is_add); |
0 | 374 |
6843 | 375 void print_inlining(ciMethod* callee, const char* msg = NULL, bool success = true); |
0 | 376 |
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377 void profile_call(ciMethod* callee, Value recv, ciKlass* predicted_holder, Values* obj_args, bool inlined); |
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378 void profile_return_type(Value ret, ciMethod* callee, ciMethod* m = NULL, int bci = -1); |
1825 | 379 void profile_invocation(ciMethod* inlinee, ValueStack* state); |
0 | 380 |
1783 | 381 // Shortcuts to profiling control. |
382 bool is_profiling() { return _compilation->is_profiling(); } | |
383 bool count_invocations() { return _compilation->count_invocations(); } | |
384 bool count_backedges() { return _compilation->count_backedges(); } | |
385 bool profile_branches() { return _compilation->profile_branches(); } | |
386 bool profile_calls() { return _compilation->profile_calls(); } | |
387 bool profile_inlined_calls() { return _compilation->profile_inlined_calls(); } | |
388 bool profile_checkcasts() { return _compilation->profile_checkcasts(); } | |
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389 bool profile_parameters() { return _compilation->profile_parameters(); } |
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390 bool profile_arguments() { return _compilation->profile_arguments(); } |
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391 bool profile_return() { return _compilation->profile_return(); } |
0 | 392 |
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393 Values* args_list_for_profiling(ciMethod* target, int& start, bool may_have_receiver); |
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394 Values* collect_args_for_profiling(Values* args, ciMethod* target, bool may_have_receiver); |
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395 void check_args_for_profiling(Values* obj_args, int expected); |
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396 |
0 | 397 public: |
398 NOT_PRODUCT(void print_stats();) | |
399 | |
400 // initialization | |
401 static void initialize(); | |
402 | |
403 // public | |
404 static bool can_trap(ciMethod* method, Bytecodes::Code code) { | |
405 assert(0 <= code && code < Bytecodes::number_of_java_codes, "illegal bytecode"); | |
406 if (_can_trap[code]) return true; | |
407 // special handling for finalizer registration | |
408 return code == Bytecodes::_return && method->intrinsic_id() == vmIntrinsics::_Object_init; | |
409 } | |
410 | |
411 // creation | |
412 GraphBuilder(Compilation* compilation, IRScope* scope); | |
413 static void sort_top_into_worklist(BlockList* worklist, BlockBegin* top); | |
414 | |
415 BlockBegin* start() const { return _start; } | |
416 }; | |
1972 | 417 |
418 #endif // SHARE_VM_C1_C1_GRAPHBUILDER_HPP |