Mercurial > hg > truffle
annotate src/share/vm/c1/c1_IR.hpp @ 14663:3edd4a71588b
8031818: Experimental VM flag for enforcing safe object construction
Summary: -XX:+AlwaysSafeConstructors to unconditionally emit the trailing constructor barrier.
Reviewed-by: kvn, roland
| author | shade |
|---|---|
| date | Mon, 03 Mar 2014 15:31:27 +0400 |
| parents | de6a9e811145 |
| children | b51e29501f30 |
| rev | line source |
|---|---|
| 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_IR_HPP |
| 26 #define SHARE_VM_C1_C1_IR_HPP | |
| 27 | |
| 28 #include "c1/c1_Instruction.hpp" | |
| 29 #include "ci/ciExceptionHandler.hpp" | |
| 30 #include "ci/ciMethod.hpp" | |
| 31 #include "ci/ciStreams.hpp" | |
| 32 #include "memory/allocation.hpp" | |
| 33 | |
| 0 | 34 // An XHandler is a C1 internal description for an exception handler |
| 35 | |
| 36 class XHandler: public CompilationResourceObj { | |
| 37 private: | |
| 38 ciExceptionHandler* _desc; | |
| 39 | |
| 40 BlockBegin* _entry_block; // Entry block of xhandler | |
| 41 LIR_List* _entry_code; // LIR-operations that must be executed before jumping to entry_block | |
| 42 int _entry_pco; // pco where entry_code (or entry_block if no entry_code) starts | |
| 43 int _phi_operand; // For resolving of phi functions at begin of entry_block | |
| 44 int _scope_count; // for filling ExceptionRangeEntry::scope_count | |
| 45 | |
| 46 #ifdef ASSERT | |
| 47 int _lir_op_id; // op_id of the LIR-operation throwing to this handler | |
| 48 #endif | |
| 49 | |
| 50 public: | |
| 51 // creation | |
| 52 XHandler(ciExceptionHandler* desc) | |
| 53 : _desc(desc) | |
| 54 , _entry_block(NULL) | |
| 55 , _entry_code(NULL) | |
| 56 , _entry_pco(-1) | |
| 57 , _phi_operand(-1) | |
| 58 , _scope_count(-1) | |
| 59 #ifdef ASSERT | |
| 60 , _lir_op_id(-1) | |
| 61 #endif | |
| 62 { } | |
| 63 | |
| 64 XHandler(XHandler* other) | |
| 65 : _desc(other->_desc) | |
| 66 , _entry_block(other->_entry_block) | |
| 67 , _entry_code(other->_entry_code) | |
| 68 , _entry_pco(other->_entry_pco) | |
| 69 , _phi_operand(other->_phi_operand) | |
| 70 , _scope_count(other->_scope_count) | |
| 71 #ifdef ASSERT | |
| 72 , _lir_op_id(other->_lir_op_id) | |
| 73 #endif | |
| 74 { } | |
| 75 | |
| 76 // accessors for data of ciExceptionHandler | |
| 77 int beg_bci() const { return _desc->start(); } | |
| 78 int end_bci() const { return _desc->limit(); } | |
| 79 int handler_bci() const { return _desc->handler_bci(); } | |
| 80 bool is_catch_all() const { return _desc->is_catch_all(); } | |
| 81 int catch_type() const { return _desc->catch_klass_index(); } | |
| 82 ciInstanceKlass* catch_klass() const { return _desc->catch_klass(); } | |
| 83 bool covers(int bci) const { return beg_bci() <= bci && bci < end_bci(); } | |
| 84 | |
| 85 // accessors for additional fields | |
| 86 BlockBegin* entry_block() const { return _entry_block; } | |
| 87 LIR_List* entry_code() const { return _entry_code; } | |
| 88 int entry_pco() const { return _entry_pco; } | |
| 89 int phi_operand() const { assert(_phi_operand != -1, "not set"); return _phi_operand; } | |
| 90 int scope_count() const { assert(_scope_count != -1, "not set"); return _scope_count; } | |
| 91 DEBUG_ONLY(int lir_op_id() const { return _lir_op_id; }); | |
| 92 | |
| 93 void set_entry_block(BlockBegin* entry_block) { | |
| 94 assert(entry_block->is_set(BlockBegin::exception_entry_flag), "must be an exception handler entry"); | |
| 95 assert(entry_block->bci() == handler_bci(), "bci's must correspond"); | |
| 96 _entry_block = entry_block; | |
| 97 } | |
| 98 void set_entry_code(LIR_List* entry_code) { _entry_code = entry_code; } | |
| 99 void set_entry_pco(int entry_pco) { _entry_pco = entry_pco; } | |
| 100 void set_phi_operand(int phi_operand) { _phi_operand = phi_operand; } | |
| 101 void set_scope_count(int scope_count) { _scope_count = scope_count; } | |
| 102 DEBUG_ONLY(void set_lir_op_id(int lir_op_id) { _lir_op_id = lir_op_id; }); | |
| 103 | |
| 104 bool equals(XHandler* other) const; | |
| 105 }; | |
| 106 | |
| 107 define_array(_XHandlerArray, XHandler*) | |
| 108 define_stack(_XHandlerList, _XHandlerArray) | |
| 109 | |
| 110 | |
| 111 // XHandlers is the C1 internal list of exception handlers for a method | |
| 112 class XHandlers: public CompilationResourceObj { | |
| 113 private: | |
| 114 _XHandlerList _list; | |
| 115 | |
| 116 public: | |
| 117 // creation | |
| 118 XHandlers() : _list() { } | |
| 119 XHandlers(ciMethod* method); | |
| 120 XHandlers(XHandlers* other); | |
| 121 | |
| 122 // accessors | |
| 123 int length() const { return _list.length(); } | |
| 124 XHandler* handler_at(int i) const { return _list.at(i); } | |
| 125 bool has_handlers() const { return _list.length() > 0; } | |
| 126 void append(XHandler* h) { _list.append(h); } | |
| 127 XHandler* remove_last() { return _list.pop(); } | |
| 128 | |
| 129 bool could_catch(ciInstanceKlass* klass, bool type_is_exact) const; | |
| 130 bool equals(XHandlers* others) const; | |
| 131 }; | |
| 132 | |
| 133 | |
| 134 class IRScope; | |
| 135 define_array(IRScopeArray, IRScope*) | |
| 136 define_stack(IRScopeList, IRScopeArray) | |
| 137 | |
| 138 class Compilation; | |
| 139 class IRScope: public CompilationResourceObj { | |
| 140 private: | |
| 141 // hierarchy | |
| 142 Compilation* _compilation; // the current compilation | |
| 143 IRScope* _caller; // the caller scope, or NULL | |
| 144 int _level; // the inlining level | |
| 145 ciMethod* _method; // the corresponding method | |
| 146 IRScopeList _callees; // the inlined method scopes | |
| 147 | |
| 148 // graph | |
| 149 XHandlers* _xhandlers; // the exception handlers | |
| 150 int _number_of_locks; // the number of monitor lock slots needed | |
| 151 bool _monitor_pairing_ok; // the monitor pairing info | |
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152 bool _wrote_final; // has written final field |
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153 bool _wrote_fields; // has written fields |
| 0 | 154 BlockBegin* _start; // the start block, successsors are method entries |
| 155 | |
| 156 BitMap _requires_phi_function; // bit is set if phi functions at loop headers are necessary for a local variable | |
| 157 | |
| 158 // helper functions | |
| 159 BlockBegin* build_graph(Compilation* compilation, int osr_bci); | |
| 160 | |
| 161 public: | |
| 162 // creation | |
| 163 IRScope(Compilation* compilation, IRScope* caller, int caller_bci, ciMethod* method, int osr_bci, bool create_graph = false); | |
| 164 | |
| 165 // accessors | |
| 166 Compilation* compilation() const { return _compilation; } | |
| 167 IRScope* caller() const { return _caller; } | |
| 168 int level() const { return _level; } | |
| 169 ciMethod* method() const { return _method; } | |
| 170 int max_stack() const; // NOTE: expensive | |
| 171 BitMap& requires_phi_function() { return _requires_phi_function; } | |
| 172 | |
| 173 // hierarchy | |
| 174 bool is_top_scope() const { return _caller == NULL; } | |
| 175 void add_callee(IRScope* callee) { _callees.append(callee); } | |
| 176 int number_of_callees() const { return _callees.length(); } | |
| 177 IRScope* callee_no(int i) const { return _callees.at(i); } | |
| 178 | |
| 179 // accessors, graph | |
| 180 bool is_valid() const { return start() != NULL; } | |
| 181 XHandlers* xhandlers() const { return _xhandlers; } | |
| 182 int number_of_locks() const { return _number_of_locks; } | |
| 183 void set_min_number_of_locks(int n) { if (n > _number_of_locks) _number_of_locks = n; } | |
| 184 bool monitor_pairing_ok() const { return _monitor_pairing_ok; } | |
| 185 BlockBegin* start() const { return _start; } | |
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186 void set_wrote_final() { _wrote_final = true; } |
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187 bool wrote_final () const { return _wrote_final; } |
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188 void set_wrote_fields() { _wrote_fields = true; } |
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189 bool wrote_fields () const { return _wrote_fields; } |
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190 |
| 0 | 191 }; |
| 192 | |
| 193 | |
| 194 // | |
| 195 // IRScopeDebugInfo records the debug information for a particular IRScope | |
| 196 // in a particular CodeEmitInfo. This allows the information to be computed | |
| 197 // once early enough for the OopMap to be available to the LIR and also to be | |
| 198 // reemited for different pcs using the same CodeEmitInfo without recomputing | |
| 199 // everything. | |
| 200 // | |
| 201 | |
| 202 class IRScopeDebugInfo: public CompilationResourceObj { | |
| 203 private: | |
| 204 IRScope* _scope; | |
| 205 int _bci; | |
| 206 GrowableArray<ScopeValue*>* _locals; | |
| 207 GrowableArray<ScopeValue*>* _expressions; | |
| 208 GrowableArray<MonitorValue*>* _monitors; | |
| 209 IRScopeDebugInfo* _caller; | |
| 210 | |
| 211 public: | |
| 212 IRScopeDebugInfo(IRScope* scope, | |
| 213 int bci, | |
| 214 GrowableArray<ScopeValue*>* locals, | |
| 215 GrowableArray<ScopeValue*>* expressions, | |
| 216 GrowableArray<MonitorValue*>* monitors, | |
| 217 IRScopeDebugInfo* caller): | |
| 218 _scope(scope) | |
| 219 , _locals(locals) | |
| 220 , _bci(bci) | |
| 221 , _expressions(expressions) | |
| 222 , _monitors(monitors) | |
| 223 , _caller(caller) {} | |
| 224 | |
| 225 | |
| 226 IRScope* scope() { return _scope; } | |
| 227 int bci() { return _bci; } | |
| 228 GrowableArray<ScopeValue*>* locals() { return _locals; } | |
| 229 GrowableArray<ScopeValue*>* expressions() { return _expressions; } | |
| 230 GrowableArray<MonitorValue*>* monitors() { return _monitors; } | |
| 231 IRScopeDebugInfo* caller() { return _caller; } | |
| 232 | |
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233 //Whether we should reexecute this bytecode for deopt |
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234 bool should_reexecute(); |
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235 |
| 1295 | 236 void record_debug_info(DebugInformationRecorder* recorder, int pc_offset, bool topmost, bool is_method_handle_invoke = false) { |
| 0 | 237 if (caller() != NULL) { |
| 238 // Order is significant: Must record caller first. | |
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239 caller()->record_debug_info(recorder, pc_offset, false/*topmost*/); |
| 0 | 240 } |
| 241 DebugToken* locvals = recorder->create_scope_values(locals()); | |
| 242 DebugToken* expvals = recorder->create_scope_values(expressions()); | |
| 243 DebugToken* monvals = recorder->create_monitor_values(monitors()); | |
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244 // reexecute allowed only for the topmost frame |
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245 bool reexecute = topmost ? should_reexecute() : false; |
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246 bool return_oop = false; // This flag will be ignored since it used only for C2 with escape analysis. |
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247 recorder->describe_scope(pc_offset, scope()->method(), bci(), reexecute, is_method_handle_invoke, return_oop, locvals, expvals, monvals); |
| 0 | 248 } |
| 249 }; | |
| 250 | |
| 251 | |
| 252 class CodeEmitInfo: public CompilationResourceObj { | |
| 253 friend class LinearScan; | |
| 254 private: | |
| 255 IRScopeDebugInfo* _scope_debug_info; | |
| 256 IRScope* _scope; | |
| 257 XHandlers* _exception_handlers; | |
| 258 OopMap* _oop_map; | |
| 259 ValueStack* _stack; // used by deoptimization (contains also monitors | |
| 1564 | 260 bool _is_method_handle_invoke; // true if the associated call site is a MethodHandle call site. |
| 8860 | 261 bool _deoptimize_on_exception; |
| 0 | 262 |
| 263 FrameMap* frame_map() const { return scope()->compilation()->frame_map(); } | |
| 264 Compilation* compilation() const { return scope()->compilation(); } | |
| 265 | |
| 266 public: | |
| 267 | |
| 268 // use scope from ValueStack | |
| 8860 | 269 CodeEmitInfo(ValueStack* stack, XHandlers* exception_handlers, bool deoptimize_on_exception = false); |
| 0 | 270 |
| 271 // make a copy | |
| 1819 | 272 CodeEmitInfo(CodeEmitInfo* info, ValueStack* stack = NULL); |
| 0 | 273 |
| 274 // accessors | |
| 275 OopMap* oop_map() { return _oop_map; } | |
| 276 ciMethod* method() const { return _scope->method(); } | |
| 277 IRScope* scope() const { return _scope; } | |
| 278 XHandlers* exception_handlers() const { return _exception_handlers; } | |
| 279 ValueStack* stack() const { return _stack; } | |
| 8860 | 280 bool deoptimize_on_exception() const { return _deoptimize_on_exception; } |
| 0 | 281 |
| 282 void add_register_oop(LIR_Opr opr); | |
| 1564 | 283 void record_debug_info(DebugInformationRecorder* recorder, int pc_offset); |
| 0 | 284 |
| 1564 | 285 bool is_method_handle_invoke() const { return _is_method_handle_invoke; } |
| 286 void set_is_method_handle_invoke(bool x) { _is_method_handle_invoke = x; } | |
| 0 | 287 }; |
| 288 | |
| 289 | |
| 290 class IR: public CompilationResourceObj { | |
| 291 private: | |
| 292 Compilation* _compilation; // the current compilation | |
| 293 IRScope* _top_scope; // the root of the scope hierarchy | |
| 294 WordSize _locals_size; // the space required for all locals | |
| 295 int _num_loops; // Total number of loops | |
| 296 BlockList* _code; // the blocks in code generation order w/ use counts | |
| 297 | |
| 298 public: | |
| 299 // creation | |
| 300 IR(Compilation* compilation, ciMethod* method, int osr_bci); | |
| 301 | |
| 302 // accessors | |
| 303 bool is_valid() const { return top_scope()->is_valid(); } | |
| 304 Compilation* compilation() const { return _compilation; } | |
| 305 IRScope* top_scope() const { return _top_scope; } | |
| 306 int number_of_locks() const { return top_scope()->number_of_locks(); } | |
| 307 ciMethod* method() const { return top_scope()->method(); } | |
| 308 BlockBegin* start() const { return top_scope()->start(); } | |
| 309 BlockBegin* std_entry() const { return start()->end()->as_Base()->std_entry(); } | |
| 310 BlockBegin* osr_entry() const { return start()->end()->as_Base()->osr_entry(); } | |
| 311 WordSize locals_size() const { return _locals_size; } | |
| 312 int locals_size_in_words() const { return in_words(_locals_size); } | |
| 313 BlockList* code() const { return _code; } | |
| 314 int num_loops() const { return _num_loops; } | |
| 315 int max_stack() const { return top_scope()->max_stack(); } // expensive | |
| 316 | |
| 317 // ir manipulation | |
| 8860 | 318 void optimize_blocks(); |
| 319 void eliminate_null_checks(); | |
| 0 | 320 void compute_predecessors(); |
| 321 void split_critical_edges(); | |
| 322 void compute_code(); | |
| 323 void compute_use_counts(); | |
| 324 | |
| 325 // The linear-scan order and the code emission order are equal, but | |
| 326 // this may change in future | |
| 327 BlockList* linear_scan_order() { assert(_code != NULL, "not computed"); return _code; } | |
| 328 | |
| 329 // iteration | |
| 330 void iterate_preorder (BlockClosure* closure); | |
| 331 void iterate_postorder (BlockClosure* closure); | |
| 332 void iterate_linear_scan_order(BlockClosure* closure); | |
| 333 | |
| 334 // debugging | |
| 335 static void print(BlockBegin* start, bool cfg_only, bool live_only = false) PRODUCT_RETURN; | |
| 336 void print(bool cfg_only, bool live_only = false) PRODUCT_RETURN; | |
| 337 void verify() PRODUCT_RETURN; | |
| 338 }; | |
| 339 | |
| 340 | |
| 341 // Globally do instruction substitution and remove substituted | |
| 342 // instructions from the instruction list. | |
| 343 // | |
| 344 | |
| 1584 | 345 class SubstitutionResolver: public BlockClosure, ValueVisitor { |
| 346 virtual void visit(Value* v); | |
| 0 | 347 |
| 348 public: | |
| 349 SubstitutionResolver(IR* hir) { | |
| 350 hir->iterate_preorder(this); | |
| 351 } | |
| 352 | |
| 353 SubstitutionResolver(BlockBegin* block) { | |
| 354 block->iterate_preorder(this); | |
| 355 } | |
| 356 | |
| 357 virtual void block_do(BlockBegin* block); | |
| 358 }; | |
| 1972 | 359 |
| 360 #endif // SHARE_VM_C1_C1_IR_HPP |