1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_OPTO_COMPILE_HPP 26 #define SHARE_VM_OPTO_COMPILE_HPP 27 28 #include "asm/codeBuffer.hpp" 29 #include "ci/compilerInterface.hpp" 30 #include "code/debugInfoRec.hpp" 31 #include "code/exceptionHandlerTable.hpp" 32 #include "compiler/compilerOracle.hpp" 33 #include "compiler/compileBroker.hpp" 34 #include "libadt/dict.hpp" 35 #include "libadt/vectset.hpp" 36 #include "memory/resourceArea.hpp" 37 #include "opto/idealGraphPrinter.hpp" 38 #include "opto/phasetype.hpp" 39 #include "opto/phase.hpp" 40 #include "opto/regmask.hpp" 41 #include "runtime/deoptimization.hpp" 42 #include "runtime/vmThread.hpp" 43 #include "trace/tracing.hpp" 44 #include "utilities/ticks.hpp" 45 46 class Block; 47 class Bundle; 48 class C2Compiler; 49 class CallGenerator; 50 class CloneMap; 51 class ConnectionGraph; 52 class InlineTree; 53 class Int_Array; 54 class Matcher; 55 class MachConstantNode; 56 class MachConstantBaseNode; 57 class MachNode; 58 class MachOper; 59 class MachSafePointNode; 60 class Node; 61 class Node_Array; 62 class Node_Notes; 63 class NodeCloneInfo; 64 class OptoReg; 65 class PhaseCFG; 66 class PhaseGVN; 67 class PhaseIterGVN; 68 class PhaseRegAlloc; 69 class PhaseCCP; 70 class PhaseCCP_DCE; 71 class RootNode; 72 class relocInfo; 73 class Scope; 74 class StartNode; 75 class SafePointNode; 76 class JVMState; 77 class Type; 78 class TypeData; 79 class TypeInt; 80 class TypePtr; 81 class TypeOopPtr; 82 class TypeFunc; 83 class Unique_Node_List; 84 class nmethod; 85 class WarmCallInfo; 86 class Node_Stack; 87 struct Final_Reshape_Counts; 88 89 typedef unsigned int node_idx_t; 90 class NodeCloneInfo { 91 private: 92 uint64_t _idx_clone_orig; 93 public: 94 95 void set_idx(node_idx_t idx) { 96 _idx_clone_orig = _idx_clone_orig & CONST64(0xFFFFFFFF00000000) | idx; 97 } 98 node_idx_t idx() const { return (node_idx_t)(_idx_clone_orig & 0xFFFFFFFF); } 99 100 void set_gen(int generation) { 101 uint64_t g = (uint64_t)generation << 32; 102 _idx_clone_orig = _idx_clone_orig & 0xFFFFFFFF | g; 103 } 104 int gen() const { return (int)(_idx_clone_orig >> 32); } 105 106 void set(uint64_t x) { _idx_clone_orig = x; } 107 void set(node_idx_t x, int g) { set_idx(x); set_gen(g); } 108 uint64_t get() const { return _idx_clone_orig; } 109 110 NodeCloneInfo(uint64_t idx_clone_orig) : _idx_clone_orig(idx_clone_orig) {} 111 NodeCloneInfo(node_idx_t x, int g) {set(x, g);} 112 113 void dump() const; 114 }; 115 116 class CloneMap { 117 friend class Compile; 118 private: 119 bool _debug; 120 Dict* _dict; 121 int _clone_idx; // current cloning iteration/generation in loop unroll 122 public: 123 void* _2p(node_idx_t key) const { return (void*)(intptr_t)key; } // 2 conversion functions to make gcc happy 124 node_idx_t _2_node_idx_t(const void* k) const { return (node_idx_t)(intptr_t)k; } 125 Dict* dict() const { return _dict; } 126 void insert(node_idx_t key, uint64_t val) { assert(_dict->operator[](_2p(key)) == NULL, "key existed"); _dict->Insert(_2p(key), (void*)val); } 127 void insert(node_idx_t key, NodeCloneInfo& ci) { insert(key, ci.get()); } 128 void remove(node_idx_t key) { _dict->Delete(_2p(key)); } 129 uint64_t value(node_idx_t key) const { return (uint64_t)_dict->operator[](_2p(key)); } 130 node_idx_t idx(node_idx_t key) const { return NodeCloneInfo(value(key)).idx(); } 131 int gen(node_idx_t key) const { return NodeCloneInfo(value(key)).gen(); } 132 int gen(const void* k) const { return gen(_2_node_idx_t(k)); } 133 int max_gen() const; 134 void clone(Node* old, Node* nnn, int gen); 135 void verify_insert_and_clone(Node* old, Node* nnn, int gen); 136 void dump(node_idx_t key) const; 137 138 int clone_idx() const { return _clone_idx; } 139 void set_clone_idx(int x) { _clone_idx = x; } 140 bool is_debug() const { return _debug; } 141 void set_debug(bool debug) { _debug = debug; } 142 static const char* debug_option_name; 143 144 bool same_idx(node_idx_t k1, node_idx_t k2) const { return idx(k1) == idx(k2); } 145 bool same_gen(node_idx_t k1, node_idx_t k2) const { return gen(k1) == gen(k2); } 146 }; 147 148 //------------------------------Compile---------------------------------------- 149 // This class defines a top-level Compiler invocation. 150 151 class Compile : public Phase { 152 friend class VMStructs; 153 154 public: 155 // Fixed alias indexes. (See also MergeMemNode.) 156 enum { 157 AliasIdxTop = 1, // pseudo-index, aliases to nothing (used as sentinel value) 158 AliasIdxBot = 2, // pseudo-index, aliases to everything 159 AliasIdxRaw = 3 // hard-wired index for TypeRawPtr::BOTTOM 160 }; 161 162 // Variant of TraceTime(NULL, &_t_accumulator, CITime); 163 // Integrated with logging. If logging is turned on, and CITimeVerbose is true, 164 // then brackets are put into the log, with time stamps and node counts. 165 // (The time collection itself is always conditionalized on CITime.) 166 class TracePhase : public TraceTime { 167 private: 168 Compile* C; 169 CompileLog* _log; 170 const char* _phase_name; 171 bool _dolog; 172 public: 173 TracePhase(const char* name, elapsedTimer* accumulator); 174 ~TracePhase(); 175 }; 176 177 // Information per category of alias (memory slice) 178 class AliasType { 179 private: 180 friend class Compile; 181 182 int _index; // unique index, used with MergeMemNode 183 const TypePtr* _adr_type; // normalized address type 184 ciField* _field; // relevant instance field, or null if none 185 const Type* _element; // relevant array element type, or null if none 186 bool _is_rewritable; // false if the memory is write-once only 187 int _general_index; // if this is type is an instance, the general 188 // type that this is an instance of 189 190 void Init(int i, const TypePtr* at); 191 192 public: 193 int index() const { return _index; } 194 const TypePtr* adr_type() const { return _adr_type; } 195 ciField* field() const { return _field; } 196 const Type* element() const { return _element; } 197 bool is_rewritable() const { return _is_rewritable; } 198 bool is_volatile() const { return (_field ? _field->is_volatile() : false); } 199 int general_index() const { return (_general_index != 0) ? _general_index : _index; } 200 201 void set_rewritable(bool z) { _is_rewritable = z; } 202 void set_field(ciField* f) { 203 assert(!_field,""); 204 _field = f; 205 if (f->is_final() || f->is_stable()) { 206 // In the case of @Stable, multiple writes are possible but may be assumed to be no-ops. 207 _is_rewritable = false; 208 } 209 } 210 void set_element(const Type* e) { 211 assert(_element == NULL, ""); 212 _element = e; 213 } 214 215 void print_on(outputStream* st) PRODUCT_RETURN; 216 }; 217 218 enum { 219 logAliasCacheSize = 6, 220 AliasCacheSize = (1<<logAliasCacheSize) 221 }; 222 struct AliasCacheEntry { const TypePtr* _adr_type; int _index; }; // simple duple type 223 enum { 224 trapHistLength = MethodData::_trap_hist_limit 225 }; 226 227 // Constant entry of the constant table. 228 class Constant { 229 private: 230 BasicType _type; 231 union { 232 jvalue _value; 233 Metadata* _metadata; 234 } _v; 235 int _offset; // offset of this constant (in bytes) relative to the constant table base. 236 float _freq; 237 bool _can_be_reused; // true (default) if the value can be shared with other users. 238 239 public: 240 Constant() : _type(T_ILLEGAL), _offset(-1), _freq(0.0f), _can_be_reused(true) { _v._value.l = 0; } 241 Constant(BasicType type, jvalue value, float freq = 0.0f, bool can_be_reused = true) : 242 _type(type), 243 _offset(-1), 244 _freq(freq), 245 _can_be_reused(can_be_reused) 246 { 247 assert(type != T_METADATA, "wrong constructor"); 248 _v._value = value; 249 } 250 Constant(Metadata* metadata, bool can_be_reused = true) : 251 _type(T_METADATA), 252 _offset(-1), 253 _freq(0.0f), 254 _can_be_reused(can_be_reused) 255 { 256 _v._metadata = metadata; 257 } 258 259 bool operator==(const Constant& other); 260 261 BasicType type() const { return _type; } 262 263 jlong get_jlong() const { return _v._value.j; } 264 jfloat get_jfloat() const { return _v._value.f; } 265 jdouble get_jdouble() const { return _v._value.d; } 266 jobject get_jobject() const { return _v._value.l; } 267 268 Metadata* get_metadata() const { return _v._metadata; } 269 270 int offset() const { return _offset; } 271 void set_offset(int offset) { _offset = offset; } 272 273 float freq() const { return _freq; } 274 void inc_freq(float freq) { _freq += freq; } 275 276 bool can_be_reused() const { return _can_be_reused; } 277 }; 278 279 // Constant table. 280 class ConstantTable { 281 private: 282 GrowableArray<Constant> _constants; // Constants of this table. 283 int _size; // Size in bytes the emitted constant table takes (including padding). 284 int _table_base_offset; // Offset of the table base that gets added to the constant offsets. 285 int _nof_jump_tables; // Number of jump-tables in this constant table. 286 287 static int qsort_comparator(Constant* a, Constant* b); 288 289 // We use negative frequencies to keep the order of the 290 // jump-tables in which they were added. Otherwise we get into 291 // trouble with relocation. 292 float next_jump_table_freq() { return -1.0f * (++_nof_jump_tables); } 293 294 public: 295 ConstantTable() : 296 _size(-1), 297 _table_base_offset(-1), // We can use -1 here since the constant table is always bigger than 2 bytes (-(size / 2), see MachConstantBaseNode::emit). 298 _nof_jump_tables(0) 299 {} 300 301 int size() const { assert(_size != -1, "not calculated yet"); return _size; } 302 303 int calculate_table_base_offset() const; // AD specific 304 void set_table_base_offset(int x) { assert(_table_base_offset == -1 || x == _table_base_offset, "can't change"); _table_base_offset = x; } 305 int table_base_offset() const { assert(_table_base_offset != -1, "not set yet"); return _table_base_offset; } 306 307 void emit(CodeBuffer& cb); 308 309 // Returns the offset of the last entry (the top) of the constant table. 310 int top_offset() const { assert(_constants.top().offset() != -1, "not bound yet"); return _constants.top().offset(); } 311 312 void calculate_offsets_and_size(); 313 int find_offset(Constant& con) const; 314 315 void add(Constant& con); 316 Constant add(MachConstantNode* n, BasicType type, jvalue value); 317 Constant add(Metadata* metadata); 318 Constant add(MachConstantNode* n, MachOper* oper); 319 Constant add(MachConstantNode* n, jfloat f) { 320 jvalue value; value.f = f; 321 return add(n, T_FLOAT, value); 322 } 323 Constant add(MachConstantNode* n, jdouble d) { 324 jvalue value; value.d = d; 325 return add(n, T_DOUBLE, value); 326 } 327 328 // Jump-table 329 Constant add_jump_table(MachConstantNode* n); 330 void fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray<Label*> labels) const; 331 }; 332 333 private: 334 // Fixed parameters to this compilation. 335 const int _compile_id; 336 const bool _save_argument_registers; // save/restore arg regs for trampolines 337 const bool _subsume_loads; // Load can be matched as part of a larger op. 338 const bool _do_escape_analysis; // Do escape analysis. 339 const bool _eliminate_boxing; // Do boxing elimination. 340 ciMethod* _method; // The method being compiled. 341 int _entry_bci; // entry bci for osr methods. 342 const TypeFunc* _tf; // My kind of signature 343 InlineTree* _ilt; // Ditto (temporary). 344 address _stub_function; // VM entry for stub being compiled, or NULL 345 const char* _stub_name; // Name of stub or adapter being compiled, or NULL 346 address _stub_entry_point; // Compile code entry for generated stub, or NULL 347 348 // Control of this compilation. 349 int _num_loop_opts; // Number of iterations for doing loop optimiztions 350 int _max_inline_size; // Max inline size for this compilation 351 int _freq_inline_size; // Max hot method inline size for this compilation 352 int _fixed_slots; // count of frame slots not allocated by the register 353 // allocator i.e. locks, original deopt pc, etc. 354 uintx _max_node_limit; // Max unique node count during a single compilation. 355 // For deopt 356 int _orig_pc_slot; 357 int _orig_pc_slot_offset_in_bytes; 358 359 int _major_progress; // Count of something big happening 360 bool _inlining_progress; // progress doing incremental inlining? 361 bool _inlining_incrementally;// Are we doing incremental inlining (post parse) 362 bool _has_loops; // True if the method _may_ have some loops 363 bool _has_split_ifs; // True if the method _may_ have some split-if 364 bool _has_unsafe_access; // True if the method _may_ produce faults in unsafe loads or stores. 365 bool _has_stringbuilder; // True StringBuffers or StringBuilders are allocated 366 bool _has_boxed_value; // True if a boxed object is allocated 367 bool _has_reserved_stack_access; // True if the method or an inlined method is annotated with ReservedStackAccess 368 int _max_vector_size; // Maximum size of generated vectors 369 uint _trap_hist[trapHistLength]; // Cumulative traps 370 bool _trap_can_recompile; // Have we emitted a recompiling trap? 371 uint _decompile_count; // Cumulative decompilation counts. 372 bool _do_inlining; // True if we intend to do inlining 373 bool _do_scheduling; // True if we intend to do scheduling 374 bool _do_freq_based_layout; // True if we intend to do frequency based block layout 375 bool _do_count_invocations; // True if we generate code to count invocations 376 bool _do_method_data_update; // True if we generate code to update MethodData*s 377 bool _do_vector_loop; // True if allowed to execute loop in parallel iterations 378 bool _age_code; // True if we need to profile code age (decrement the aging counter) 379 int _AliasLevel; // Locally-adjusted version of AliasLevel flag. 380 bool _print_assembly; // True if we should dump assembly code for this compilation 381 bool _print_inlining; // True if we should print inlining for this compilation 382 bool _print_intrinsics; // True if we should print intrinsics for this compilation 383 #ifndef PRODUCT 384 bool _trace_opto_output; 385 bool _parsed_irreducible_loop; // True if ciTypeFlow detected irreducible loops during parsing 386 #endif 387 bool _has_irreducible_loop; // Found irreducible loops 388 // JSR 292 389 bool _has_method_handle_invokes; // True if this method has MethodHandle invokes. 390 RTMState _rtm_state; // State of Restricted Transactional Memory usage 391 392 // Compilation environment. 393 Arena _comp_arena; // Arena with lifetime equivalent to Compile 394 ciEnv* _env; // CI interface 395 CompileLog* _log; // from CompilerThread 396 const char* _failure_reason; // for record_failure/failing pattern 397 GrowableArray<CallGenerator*>* _intrinsics; // List of intrinsics. 398 GrowableArray<Node*>* _macro_nodes; // List of nodes which need to be expanded before matching. 399 GrowableArray<Node*>* _predicate_opaqs; // List of Opaque1 nodes for the loop predicates. 400 GrowableArray<Node*>* _expensive_nodes; // List of nodes that are expensive to compute and that we'd better not let the GVN freely common 401 ConnectionGraph* _congraph; 402 #ifndef PRODUCT 403 IdealGraphPrinter* _printer; 404 #endif 405 406 407 // Node management 408 uint _unique; // Counter for unique Node indices 409 VectorSet _dead_node_list; // Set of dead nodes 410 uint _dead_node_count; // Number of dead nodes; VectorSet::Size() is O(N). 411 // So use this to keep count and make the call O(1). 412 DEBUG_ONLY( Unique_Node_List* _modified_nodes; ) // List of nodes which inputs were modified 413 414 debug_only(static int _debug_idx;) // Monotonic counter (not reset), use -XX:BreakAtNode=<idx> 415 Arena _node_arena; // Arena for new-space Nodes 416 Arena _old_arena; // Arena for old-space Nodes, lifetime during xform 417 RootNode* _root; // Unique root of compilation, or NULL after bail-out. 418 Node* _top; // Unique top node. (Reset by various phases.) 419 420 Node* _immutable_memory; // Initial memory state 421 422 Node* _recent_alloc_obj; 423 Node* _recent_alloc_ctl; 424 425 // Constant table 426 ConstantTable _constant_table; // The constant table for this compile. 427 MachConstantBaseNode* _mach_constant_base_node; // Constant table base node singleton. 428 429 430 // Blocked array of debugging and profiling information, 431 // tracked per node. 432 enum { _log2_node_notes_block_size = 8, 433 _node_notes_block_size = (1<<_log2_node_notes_block_size) 434 }; 435 GrowableArray<Node_Notes*>* _node_note_array; 436 Node_Notes* _default_node_notes; // default notes for new nodes 437 438 // After parsing and every bulk phase we hang onto the Root instruction. 439 // The RootNode instruction is where the whole program begins. It produces 440 // the initial Control and BOTTOM for everybody else. 441 442 // Type management 443 Arena _Compile_types; // Arena for all types 444 Arena* _type_arena; // Alias for _Compile_types except in Initialize_shared() 445 Dict* _type_dict; // Intern table 446 CloneMap _clone_map; // used for recording history of cloned nodes 447 void* _type_hwm; // Last allocation (see Type::operator new/delete) 448 size_t _type_last_size; // Last allocation size (see Type::operator new/delete) 449 ciMethod* _last_tf_m; // Cache for 450 const TypeFunc* _last_tf; // TypeFunc::make 451 AliasType** _alias_types; // List of alias types seen so far. 452 int _num_alias_types; // Logical length of _alias_types 453 int _max_alias_types; // Physical length of _alias_types 454 AliasCacheEntry _alias_cache[AliasCacheSize]; // Gets aliases w/o data structure walking 455 456 // Parsing, optimization 457 PhaseGVN* _initial_gvn; // Results of parse-time PhaseGVN 458 Unique_Node_List* _for_igvn; // Initial work-list for next round of Iterative GVN 459 WarmCallInfo* _warm_calls; // Sorted work-list for heat-based inlining. 460 461 GrowableArray<CallGenerator*> _late_inlines; // List of CallGenerators to be revisited after 462 // main parsing has finished. 463 GrowableArray<CallGenerator*> _string_late_inlines; // same but for string operations 464 465 GrowableArray<CallGenerator*> _boxing_late_inlines; // same but for boxing operations 466 467 int _late_inlines_pos; // Where in the queue should the next late inlining candidate go (emulate depth first inlining) 468 uint _number_of_mh_late_inlines; // number of method handle late inlining still pending 469 470 471 // Inlining may not happen in parse order which would make 472 // PrintInlining output confusing. Keep track of PrintInlining 473 // pieces in order. 474 class PrintInliningBuffer : public ResourceObj { 475 private: 476 CallGenerator* _cg; 477 stringStream* _ss; 478 479 public: 480 PrintInliningBuffer() 481 : _cg(NULL) { _ss = new stringStream(); } 482 483 stringStream* ss() const { return _ss; } 484 CallGenerator* cg() const { return _cg; } 485 void set_cg(CallGenerator* cg) { _cg = cg; } 486 }; 487 488 stringStream* _print_inlining_stream; 489 GrowableArray<PrintInliningBuffer>* _print_inlining_list; 490 int _print_inlining_idx; 491 char* _print_inlining_output; 492 493 // Only keep nodes in the expensive node list that need to be optimized 494 void cleanup_expensive_nodes(PhaseIterGVN &igvn); 495 // Use for sorting expensive nodes to bring similar nodes together 496 static int cmp_expensive_nodes(Node** n1, Node** n2); 497 // Expensive nodes list already sorted? 498 bool expensive_nodes_sorted() const; 499 // Remove the speculative part of types and clean up the graph 500 void remove_speculative_types(PhaseIterGVN &igvn); 501 502 void* _replay_inline_data; // Pointer to data loaded from file 503 504 void print_inlining_init(); 505 void print_inlining_reinit(); 506 void print_inlining_commit(); 507 void print_inlining_push(); 508 PrintInliningBuffer& print_inlining_current(); 509 510 void log_late_inline_failure(CallGenerator* cg, const char* msg); 511 512 public: 513 514 outputStream* print_inlining_stream() const { 515 assert(print_inlining() || print_intrinsics(), "PrintInlining off?"); 516 return _print_inlining_stream; 517 } 518 519 void print_inlining_update(CallGenerator* cg); 520 void print_inlining_update_delayed(CallGenerator* cg); 521 void print_inlining_move_to(CallGenerator* cg); 522 void print_inlining_assert_ready(); 523 void print_inlining_reset(); 524 525 void print_inlining(ciMethod* method, int inline_level, int bci, const char* msg = NULL) { 526 stringStream ss; 527 CompileTask::print_inlining_inner(&ss, method, inline_level, bci, msg); 528 print_inlining_stream()->print("%s", ss.as_string()); 529 } 530 531 void log_late_inline(CallGenerator* cg); 532 void log_inline_id(CallGenerator* cg); 533 void log_inline_failure(const char* msg); 534 535 void* replay_inline_data() const { return _replay_inline_data; } 536 537 // Dump inlining replay data to the stream. 538 void dump_inline_data(outputStream* out); 539 540 private: 541 // Matching, CFG layout, allocation, code generation 542 PhaseCFG* _cfg; // Results of CFG finding 543 bool _select_24_bit_instr; // We selected an instruction with a 24-bit result 544 bool _in_24_bit_fp_mode; // We are emitting instructions with 24-bit results 545 int _java_calls; // Number of java calls in the method 546 int _inner_loops; // Number of inner loops in the method 547 Matcher* _matcher; // Engine to map ideal to machine instructions 548 PhaseRegAlloc* _regalloc; // Results of register allocation. 549 int _frame_slots; // Size of total frame in stack slots 550 CodeOffsets _code_offsets; // Offsets into the code for various interesting entries 551 RegMask _FIRST_STACK_mask; // All stack slots usable for spills (depends on frame layout) 552 Arena* _indexSet_arena; // control IndexSet allocation within PhaseChaitin 553 void* _indexSet_free_block_list; // free list of IndexSet bit blocks 554 int _interpreter_frame_size; 555 556 uint _node_bundling_limit; 557 Bundle* _node_bundling_base; // Information for instruction bundling 558 559 // Instruction bits passed off to the VM 560 int _method_size; // Size of nmethod code segment in bytes 561 CodeBuffer _code_buffer; // Where the code is assembled 562 int _first_block_size; // Size of unvalidated entry point code / OSR poison code 563 ExceptionHandlerTable _handler_table; // Table of native-code exception handlers 564 ImplicitExceptionTable _inc_table; // Table of implicit null checks in native code 565 OopMapSet* _oop_map_set; // Table of oop maps (one for each safepoint location) 566 static int _CompiledZap_count; // counter compared against CompileZap[First/Last] 567 BufferBlob* _scratch_buffer_blob; // For temporary code buffers. 568 relocInfo* _scratch_locs_memory; // For temporary code buffers. 569 int _scratch_const_size; // For temporary code buffers. 570 bool _in_scratch_emit_size; // true when in scratch_emit_size. 571 572 public: 573 // Accessors 574 575 // The Compile instance currently active in this (compiler) thread. 576 static Compile* current() { 577 return (Compile*) ciEnv::current()->compiler_data(); 578 } 579 580 // ID for this compilation. Useful for setting breakpoints in the debugger. 581 int compile_id() const { return _compile_id; } 582 583 // Does this compilation allow instructions to subsume loads? User 584 // instructions that subsume a load may result in an unschedulable 585 // instruction sequence. 586 bool subsume_loads() const { return _subsume_loads; } 587 /** Do escape analysis. */ 588 bool do_escape_analysis() const { return _do_escape_analysis; } 589 /** Do boxing elimination. */ 590 bool eliminate_boxing() const { return _eliminate_boxing; } 591 /** Do aggressive boxing elimination. */ 592 bool aggressive_unboxing() const { return _eliminate_boxing && AggressiveUnboxing; } 593 bool save_argument_registers() const { return _save_argument_registers; } 594 595 596 // Other fixed compilation parameters. 597 ciMethod* method() const { return _method; } 598 int entry_bci() const { return _entry_bci; } 599 bool is_osr_compilation() const { return _entry_bci != InvocationEntryBci; } 600 bool is_method_compilation() const { return (_method != NULL && !_method->flags().is_native()); } 601 const TypeFunc* tf() const { assert(_tf!=NULL, ""); return _tf; } 602 void init_tf(const TypeFunc* tf) { assert(_tf==NULL, ""); _tf = tf; } 603 InlineTree* ilt() const { return _ilt; } 604 address stub_function() const { return _stub_function; } 605 const char* stub_name() const { return _stub_name; } 606 address stub_entry_point() const { return _stub_entry_point; } 607 608 // Control of this compilation. 609 int fixed_slots() const { assert(_fixed_slots >= 0, ""); return _fixed_slots; } 610 void set_fixed_slots(int n) { _fixed_slots = n; } 611 int major_progress() const { return _major_progress; } 612 void set_inlining_progress(bool z) { _inlining_progress = z; } 613 int inlining_progress() const { return _inlining_progress; } 614 void set_inlining_incrementally(bool z) { _inlining_incrementally = z; } 615 int inlining_incrementally() const { return _inlining_incrementally; } 616 void set_major_progress() { _major_progress++; } 617 void clear_major_progress() { _major_progress = 0; } 618 int num_loop_opts() const { return _num_loop_opts; } 619 void set_num_loop_opts(int n) { _num_loop_opts = n; } 620 int max_inline_size() const { return _max_inline_size; } 621 void set_freq_inline_size(int n) { _freq_inline_size = n; } 622 int freq_inline_size() const { return _freq_inline_size; } 623 void set_max_inline_size(int n) { _max_inline_size = n; } 624 bool has_loops() const { return _has_loops; } 625 void set_has_loops(bool z) { _has_loops = z; } 626 bool has_split_ifs() const { return _has_split_ifs; } 627 void set_has_split_ifs(bool z) { _has_split_ifs = z; } 628 bool has_unsafe_access() const { return _has_unsafe_access; } 629 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } 630 bool has_stringbuilder() const { return _has_stringbuilder; } 631 void set_has_stringbuilder(bool z) { _has_stringbuilder = z; } 632 bool has_boxed_value() const { return _has_boxed_value; } 633 void set_has_boxed_value(bool z) { _has_boxed_value = z; } 634 bool has_reserved_stack_access() const { return _has_reserved_stack_access; } 635 void set_has_reserved_stack_access(bool z) { _has_reserved_stack_access = z; } 636 int max_vector_size() const { return _max_vector_size; } 637 void set_max_vector_size(int s) { _max_vector_size = s; } 638 void set_trap_count(uint r, uint c) { assert(r < trapHistLength, "oob"); _trap_hist[r] = c; } 639 uint trap_count(uint r) const { assert(r < trapHistLength, "oob"); return _trap_hist[r]; } 640 bool trap_can_recompile() const { return _trap_can_recompile; } 641 void set_trap_can_recompile(bool z) { _trap_can_recompile = z; } 642 uint decompile_count() const { return _decompile_count; } 643 void set_decompile_count(uint c) { _decompile_count = c; } 644 bool allow_range_check_smearing() const; 645 bool do_inlining() const { return _do_inlining; } 646 void set_do_inlining(bool z) { _do_inlining = z; } 647 bool do_scheduling() const { return _do_scheduling; } 648 void set_do_scheduling(bool z) { _do_scheduling = z; } 649 bool do_freq_based_layout() const{ return _do_freq_based_layout; } 650 void set_do_freq_based_layout(bool z){ _do_freq_based_layout = z; } 651 bool do_count_invocations() const{ return _do_count_invocations; } 652 void set_do_count_invocations(bool z){ _do_count_invocations = z; } 653 bool do_method_data_update() const { return _do_method_data_update; } 654 void set_do_method_data_update(bool z) { _do_method_data_update = z; } 655 bool do_vector_loop() const { return _do_vector_loop; } 656 void set_do_vector_loop(bool z) { _do_vector_loop = z; } 657 bool age_code() const { return _age_code; } 658 void set_age_code(bool z) { _age_code = z; } 659 int AliasLevel() const { return _AliasLevel; } 660 bool print_assembly() const { return _print_assembly; } 661 void set_print_assembly(bool z) { _print_assembly = z; } 662 bool print_inlining() const { return _print_inlining; } 663 void set_print_inlining(bool z) { _print_inlining = z; } 664 bool print_intrinsics() const { return _print_intrinsics; } 665 void set_print_intrinsics(bool z) { _print_intrinsics = z; } 666 RTMState rtm_state() const { return _rtm_state; } 667 void set_rtm_state(RTMState s) { _rtm_state = s; } 668 bool use_rtm() const { return (_rtm_state & NoRTM) == 0; } 669 bool profile_rtm() const { return _rtm_state == ProfileRTM; } 670 uint max_node_limit() const { return (uint)_max_node_limit; } 671 void set_max_node_limit(uint n) { _max_node_limit = n; } 672 673 // check the CompilerOracle for special behaviours for this compile 674 bool method_has_option(const char * option) { 675 return method() != NULL && method()->has_option(option); 676 } 677 template<typename T> 678 bool method_has_option_value(const char * option, T& value) { 679 return method() != NULL && method()->has_option_value(option, value); 680 } 681 #ifndef PRODUCT 682 bool trace_opto_output() const { return _trace_opto_output; } 683 bool parsed_irreducible_loop() const { return _parsed_irreducible_loop; } 684 void set_parsed_irreducible_loop(bool z) { _parsed_irreducible_loop = z; } 685 int _in_dump_cnt; // Required for dumping ir nodes. 686 #endif 687 bool has_irreducible_loop() const { return _has_irreducible_loop; } 688 void set_has_irreducible_loop(bool z) { _has_irreducible_loop = z; } 689 690 // JSR 292 691 bool has_method_handle_invokes() const { return _has_method_handle_invokes; } 692 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } 693 694 Ticks _latest_stage_start_counter; 695 696 void begin_method() { 697 #ifndef PRODUCT 698 if (_printer && _printer->should_print(_method)) { 699 _printer->begin_method(this); 700 } 701 #endif 702 C->_latest_stage_start_counter.stamp(); 703 } 704 705 void print_method(CompilerPhaseType cpt, int level = 1) { 706 EventCompilerPhase event; 707 if (event.should_commit()) { 708 event.set_starttime(C->_latest_stage_start_counter); 709 event.set_phase((u1) cpt); 710 event.set_compileID(C->_compile_id); 711 event.set_phaseLevel(level); 712 event.commit(); 713 } 714 715 716 #ifndef PRODUCT 717 if (_printer && _printer->should_print(_method)) { 718 _printer->print_method(this, CompilerPhaseTypeHelper::to_string(cpt), level); 719 } 720 #endif 721 C->_latest_stage_start_counter.stamp(); 722 } 723 724 void end_method(int level = 1) { 725 EventCompilerPhase event; 726 if (event.should_commit()) { 727 event.set_starttime(C->_latest_stage_start_counter); 728 event.set_phase((u1) PHASE_END); 729 event.set_compileID(C->_compile_id); 730 event.set_phaseLevel(level); 731 event.commit(); 732 } 733 #ifndef PRODUCT 734 if (_printer && _printer->should_print(_method)) { 735 _printer->end_method(); 736 } 737 #endif 738 } 739 740 int macro_count() const { return _macro_nodes->length(); } 741 int predicate_count() const { return _predicate_opaqs->length();} 742 int expensive_count() const { return _expensive_nodes->length(); } 743 Node* macro_node(int idx) const { return _macro_nodes->at(idx); } 744 Node* predicate_opaque1_node(int idx) const { return _predicate_opaqs->at(idx);} 745 Node* expensive_node(int idx) const { return _expensive_nodes->at(idx); } 746 ConnectionGraph* congraph() { return _congraph;} 747 void set_congraph(ConnectionGraph* congraph) { _congraph = congraph;} 748 void add_macro_node(Node * n) { 749 //assert(n->is_macro(), "must be a macro node"); 750 assert(!_macro_nodes->contains(n), " duplicate entry in expand list"); 751 _macro_nodes->append(n); 752 } 753 void remove_macro_node(Node * n) { 754 // this function may be called twice for a node so check 755 // that the node is in the array before attempting to remove it 756 if (_macro_nodes->contains(n)) 757 _macro_nodes->remove(n); 758 // remove from _predicate_opaqs list also if it is there 759 if (predicate_count() > 0 && _predicate_opaqs->contains(n)){ 760 _predicate_opaqs->remove(n); 761 } 762 } 763 void add_expensive_node(Node * n); 764 void remove_expensive_node(Node * n) { 765 if (_expensive_nodes->contains(n)) { 766 _expensive_nodes->remove(n); 767 } 768 } 769 void add_predicate_opaq(Node * n) { 770 assert(!_predicate_opaqs->contains(n), " duplicate entry in predicate opaque1"); 771 assert(_macro_nodes->contains(n), "should have already been in macro list"); 772 _predicate_opaqs->append(n); 773 } 774 // remove the opaque nodes that protect the predicates so that the unused checks and 775 // uncommon traps will be eliminated from the graph. 776 void cleanup_loop_predicates(PhaseIterGVN &igvn); 777 bool is_predicate_opaq(Node * n) { 778 return _predicate_opaqs->contains(n); 779 } 780 781 // Are there candidate expensive nodes for optimization? 782 bool should_optimize_expensive_nodes(PhaseIterGVN &igvn); 783 // Check whether n1 and n2 are similar 784 static int cmp_expensive_nodes(Node* n1, Node* n2); 785 // Sort expensive nodes to locate similar expensive nodes 786 void sort_expensive_nodes(); 787 788 // Compilation environment. 789 Arena* comp_arena() { return &_comp_arena; } 790 ciEnv* env() const { return _env; } 791 CompileLog* log() const { return _log; } 792 bool failing() const { return _env->failing() || _failure_reason != NULL; } 793 const char* failure_reason() const { return (_env->failing()) ? _env->failure_reason() : _failure_reason; } 794 795 bool failure_reason_is(const char* r) const { 796 return (r == _failure_reason) || (r != NULL && _failure_reason != NULL && strcmp(r, _failure_reason) == 0); 797 } 798 799 void record_failure(const char* reason); 800 void record_method_not_compilable(const char* reason, bool all_tiers = false) { 801 // All bailouts cover "all_tiers" when TieredCompilation is off. 802 if (!TieredCompilation) all_tiers = true; 803 env()->record_method_not_compilable(reason, all_tiers); 804 // Record failure reason. 805 record_failure(reason); 806 } 807 void record_method_not_compilable_all_tiers(const char* reason) { 808 record_method_not_compilable(reason, true); 809 } 810 bool check_node_count(uint margin, const char* reason) { 811 if (live_nodes() + margin > max_node_limit()) { 812 record_method_not_compilable(reason); 813 return true; 814 } else { 815 return false; 816 } 817 } 818 819 // Node management 820 uint unique() const { return _unique; } 821 uint next_unique() { return _unique++; } 822 void set_unique(uint i) { _unique = i; } 823 static int debug_idx() { return debug_only(_debug_idx)+0; } 824 static void set_debug_idx(int i) { debug_only(_debug_idx = i); } 825 Arena* node_arena() { return &_node_arena; } 826 Arena* old_arena() { return &_old_arena; } 827 RootNode* root() const { return _root; } 828 void set_root(RootNode* r) { _root = r; } 829 StartNode* start() const; // (Derived from root.) 830 void init_start(StartNode* s); 831 Node* immutable_memory(); 832 833 Node* recent_alloc_ctl() const { return _recent_alloc_ctl; } 834 Node* recent_alloc_obj() const { return _recent_alloc_obj; } 835 void set_recent_alloc(Node* ctl, Node* obj) { 836 _recent_alloc_ctl = ctl; 837 _recent_alloc_obj = obj; 838 } 839 void record_dead_node(uint idx) { if (_dead_node_list.test_set(idx)) return; 840 _dead_node_count++; 841 } 842 bool is_dead_node(uint idx) { return _dead_node_list.test(idx) != 0; } 843 uint dead_node_count() { return _dead_node_count; } 844 void reset_dead_node_list() { _dead_node_list.Reset(); 845 _dead_node_count = 0; 846 } 847 uint live_nodes() const { 848 int val = _unique - _dead_node_count; 849 assert (val >= 0, "number of tracked dead nodes %d more than created nodes %d", _unique, _dead_node_count); 850 return (uint) val; 851 } 852 #ifdef ASSERT 853 uint count_live_nodes_by_graph_walk(); 854 void print_missing_nodes(); 855 #endif 856 857 // Record modified nodes to check that they are put on IGVN worklist 858 void record_modified_node(Node* n) NOT_DEBUG_RETURN; 859 void remove_modified_node(Node* n) NOT_DEBUG_RETURN; 860 DEBUG_ONLY( Unique_Node_List* modified_nodes() const { return _modified_nodes; } ) 861 862 // Constant table 863 ConstantTable& constant_table() { return _constant_table; } 864 865 MachConstantBaseNode* mach_constant_base_node(); 866 bool has_mach_constant_base_node() const { return _mach_constant_base_node != NULL; } 867 // Generated by adlc, true if CallNode requires MachConstantBase. 868 bool needs_clone_jvms(); 869 870 // Handy undefined Node 871 Node* top() const { return _top; } 872 873 // these are used by guys who need to know about creation and transformation of top: 874 Node* cached_top_node() { return _top; } 875 void set_cached_top_node(Node* tn); 876 877 GrowableArray<Node_Notes*>* node_note_array() const { return _node_note_array; } 878 void set_node_note_array(GrowableArray<Node_Notes*>* arr) { _node_note_array = arr; } 879 Node_Notes* default_node_notes() const { return _default_node_notes; } 880 void set_default_node_notes(Node_Notes* n) { _default_node_notes = n; } 881 882 Node_Notes* node_notes_at(int idx) { 883 return locate_node_notes(_node_note_array, idx, false); 884 } 885 inline bool set_node_notes_at(int idx, Node_Notes* value); 886 887 // Copy notes from source to dest, if they exist. 888 // Overwrite dest only if source provides something. 889 // Return true if information was moved. 890 bool copy_node_notes_to(Node* dest, Node* source); 891 892 // Workhorse function to sort out the blocked Node_Notes array: 893 inline Node_Notes* locate_node_notes(GrowableArray<Node_Notes*>* arr, 894 int idx, bool can_grow = false); 895 896 void grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by); 897 898 // Type management 899 Arena* type_arena() { return _type_arena; } 900 Dict* type_dict() { return _type_dict; } 901 void* type_hwm() { return _type_hwm; } 902 size_t type_last_size() { return _type_last_size; } 903 int num_alias_types() { return _num_alias_types; } 904 905 void init_type_arena() { _type_arena = &_Compile_types; } 906 void set_type_arena(Arena* a) { _type_arena = a; } 907 void set_type_dict(Dict* d) { _type_dict = d; } 908 void set_type_hwm(void* p) { _type_hwm = p; } 909 void set_type_last_size(size_t sz) { _type_last_size = sz; } 910 911 const TypeFunc* last_tf(ciMethod* m) { 912 return (m == _last_tf_m) ? _last_tf : NULL; 913 } 914 void set_last_tf(ciMethod* m, const TypeFunc* tf) { 915 assert(m != NULL || tf == NULL, ""); 916 _last_tf_m = m; 917 _last_tf = tf; 918 } 919 920 AliasType* alias_type(int idx) { assert(idx < num_alias_types(), "oob"); return _alias_types[idx]; } 921 AliasType* alias_type(const TypePtr* adr_type, ciField* field = NULL) { return find_alias_type(adr_type, false, field); } 922 bool have_alias_type(const TypePtr* adr_type); 923 AliasType* alias_type(ciField* field); 924 925 int get_alias_index(const TypePtr* at) { return alias_type(at)->index(); } 926 const TypePtr* get_adr_type(uint aidx) { return alias_type(aidx)->adr_type(); } 927 int get_general_index(uint aidx) { return alias_type(aidx)->general_index(); } 928 929 // Building nodes 930 void rethrow_exceptions(JVMState* jvms); 931 void return_values(JVMState* jvms); 932 JVMState* build_start_state(StartNode* start, const TypeFunc* tf); 933 934 // Decide how to build a call. 935 // The profile factor is a discount to apply to this site's interp. profile. 936 CallGenerator* call_generator(ciMethod* call_method, int vtable_index, bool call_does_dispatch, 937 JVMState* jvms, bool allow_inline, float profile_factor, ciKlass* speculative_receiver_type = NULL, 938 bool allow_intrinsics = true, bool delayed_forbidden = false); 939 bool should_delay_inlining(ciMethod* call_method, JVMState* jvms) { 940 return should_delay_string_inlining(call_method, jvms) || 941 should_delay_boxing_inlining(call_method, jvms); 942 } 943 bool should_delay_string_inlining(ciMethod* call_method, JVMState* jvms); 944 bool should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms); 945 946 // Helper functions to identify inlining potential at call-site 947 ciMethod* optimize_virtual_call(ciMethod* caller, int bci, ciInstanceKlass* klass, 948 ciKlass* holder, ciMethod* callee, 949 const TypeOopPtr* receiver_type, bool is_virtual, 950 bool &call_does_dispatch, int &vtable_index, 951 bool check_access = true); 952 ciMethod* optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass, 953 ciMethod* callee, const TypeOopPtr* receiver_type, 954 bool check_access = true); 955 956 // Report if there were too many traps at a current method and bci. 957 // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded. 958 // If there is no MDO at all, report no trap unless told to assume it. 959 bool too_many_traps(ciMethod* method, int bci, Deoptimization::DeoptReason reason); 960 // This version, unspecific to a particular bci, asks if 961 // PerMethodTrapLimit was exceeded for all inlined methods seen so far. 962 bool too_many_traps(Deoptimization::DeoptReason reason, 963 // Privately used parameter for logging: 964 ciMethodData* logmd = NULL); 965 // Report if there were too many recompiles at a method and bci. 966 bool too_many_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason); 967 // Return a bitset with the reasons where deoptimization is allowed, 968 // i.e., where there were not too many uncommon traps. 969 int _allowed_reasons; 970 int allowed_deopt_reasons() { return _allowed_reasons; } 971 void set_allowed_deopt_reasons(); 972 973 // Parsing, optimization 974 PhaseGVN* initial_gvn() { return _initial_gvn; } 975 Unique_Node_List* for_igvn() { return _for_igvn; } 976 inline void record_for_igvn(Node* n); // Body is after class Unique_Node_List. 977 void set_initial_gvn(PhaseGVN *gvn) { _initial_gvn = gvn; } 978 void set_for_igvn(Unique_Node_List *for_igvn) { _for_igvn = for_igvn; } 979 980 // Replace n by nn using initial_gvn, calling hash_delete and 981 // record_for_igvn as needed. 982 void gvn_replace_by(Node* n, Node* nn); 983 984 985 void identify_useful_nodes(Unique_Node_List &useful); 986 void update_dead_node_list(Unique_Node_List &useful); 987 void remove_useless_nodes (Unique_Node_List &useful); 988 989 WarmCallInfo* warm_calls() const { return _warm_calls; } 990 void set_warm_calls(WarmCallInfo* l) { _warm_calls = l; } 991 WarmCallInfo* pop_warm_call(); 992 993 // Record this CallGenerator for inlining at the end of parsing. 994 void add_late_inline(CallGenerator* cg) { 995 _late_inlines.insert_before(_late_inlines_pos, cg); 996 _late_inlines_pos++; 997 } 998 999 void prepend_late_inline(CallGenerator* cg) { 1000 _late_inlines.insert_before(0, cg); 1001 } 1002 1003 void add_string_late_inline(CallGenerator* cg) { 1004 _string_late_inlines.push(cg); 1005 } 1006 1007 void add_boxing_late_inline(CallGenerator* cg) { 1008 _boxing_late_inlines.push(cg); 1009 } 1010 1011 void remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful); 1012 1013 void process_print_inlining(); 1014 void dump_print_inlining(); 1015 1016 bool over_inlining_cutoff() const { 1017 if (!inlining_incrementally()) { 1018 return unique() > (uint)NodeCountInliningCutoff; 1019 } else { 1020 return live_nodes() > (uint)LiveNodeCountInliningCutoff; 1021 } 1022 } 1023 1024 void inc_number_of_mh_late_inlines() { _number_of_mh_late_inlines++; } 1025 void dec_number_of_mh_late_inlines() { assert(_number_of_mh_late_inlines > 0, "_number_of_mh_late_inlines < 0 !"); _number_of_mh_late_inlines--; } 1026 bool has_mh_late_inlines() const { return _number_of_mh_late_inlines > 0; } 1027 1028 void inline_incrementally_one(PhaseIterGVN& igvn); 1029 void inline_incrementally(PhaseIterGVN& igvn); 1030 void inline_string_calls(bool parse_time); 1031 void inline_boxing_calls(PhaseIterGVN& igvn); 1032 1033 // Matching, CFG layout, allocation, code generation 1034 PhaseCFG* cfg() { return _cfg; } 1035 bool select_24_bit_instr() const { return _select_24_bit_instr; } 1036 bool in_24_bit_fp_mode() const { return _in_24_bit_fp_mode; } 1037 bool has_java_calls() const { return _java_calls > 0; } 1038 int java_calls() const { return _java_calls; } 1039 int inner_loops() const { return _inner_loops; } 1040 Matcher* matcher() { return _matcher; } 1041 PhaseRegAlloc* regalloc() { return _regalloc; } 1042 int frame_slots() const { return _frame_slots; } 1043 int frame_size_in_words() const; // frame_slots in units of the polymorphic 'words' 1044 int frame_size_in_bytes() const { return _frame_slots << LogBytesPerInt; } 1045 RegMask& FIRST_STACK_mask() { return _FIRST_STACK_mask; } 1046 Arena* indexSet_arena() { return _indexSet_arena; } 1047 void* indexSet_free_block_list() { return _indexSet_free_block_list; } 1048 uint node_bundling_limit() { return _node_bundling_limit; } 1049 Bundle* node_bundling_base() { return _node_bundling_base; } 1050 void set_node_bundling_limit(uint n) { _node_bundling_limit = n; } 1051 void set_node_bundling_base(Bundle* b) { _node_bundling_base = b; } 1052 bool starts_bundle(const Node *n) const; 1053 bool need_stack_bang(int frame_size_in_bytes) const; 1054 bool need_register_stack_bang() const; 1055 1056 void update_interpreter_frame_size(int size) { 1057 if (_interpreter_frame_size < size) { 1058 _interpreter_frame_size = size; 1059 } 1060 } 1061 int bang_size_in_bytes() const; 1062 1063 void set_matcher(Matcher* m) { _matcher = m; } 1064 //void set_regalloc(PhaseRegAlloc* ra) { _regalloc = ra; } 1065 void set_indexSet_arena(Arena* a) { _indexSet_arena = a; } 1066 void set_indexSet_free_block_list(void* p) { _indexSet_free_block_list = p; } 1067 1068 // Remember if this compilation changes hardware mode to 24-bit precision 1069 void set_24_bit_selection_and_mode(bool selection, bool mode) { 1070 _select_24_bit_instr = selection; 1071 _in_24_bit_fp_mode = mode; 1072 } 1073 1074 void set_java_calls(int z) { _java_calls = z; } 1075 void set_inner_loops(int z) { _inner_loops = z; } 1076 1077 // Instruction bits passed off to the VM 1078 int code_size() { return _method_size; } 1079 CodeBuffer* code_buffer() { return &_code_buffer; } 1080 int first_block_size() { return _first_block_size; } 1081 void set_frame_complete(int off) { _code_offsets.set_value(CodeOffsets::Frame_Complete, off); } 1082 ExceptionHandlerTable* handler_table() { return &_handler_table; } 1083 ImplicitExceptionTable* inc_table() { return &_inc_table; } 1084 OopMapSet* oop_map_set() { return _oop_map_set; } 1085 DebugInformationRecorder* debug_info() { return env()->debug_info(); } 1086 Dependencies* dependencies() { return env()->dependencies(); } 1087 static int CompiledZap_count() { return _CompiledZap_count; } 1088 BufferBlob* scratch_buffer_blob() { return _scratch_buffer_blob; } 1089 void init_scratch_buffer_blob(int const_size); 1090 void clear_scratch_buffer_blob(); 1091 void set_scratch_buffer_blob(BufferBlob* b) { _scratch_buffer_blob = b; } 1092 relocInfo* scratch_locs_memory() { return _scratch_locs_memory; } 1093 void set_scratch_locs_memory(relocInfo* b) { _scratch_locs_memory = b; } 1094 1095 // emit to scratch blob, report resulting size 1096 uint scratch_emit_size(const Node* n); 1097 void set_in_scratch_emit_size(bool x) { _in_scratch_emit_size = x; } 1098 bool in_scratch_emit_size() const { return _in_scratch_emit_size; } 1099 1100 enum ScratchBufferBlob { 1101 MAX_inst_size = 1024, 1102 MAX_locs_size = 128, // number of relocInfo elements 1103 MAX_const_size = 128, 1104 MAX_stubs_size = 128 1105 }; 1106 1107 // Major entry point. Given a Scope, compile the associated method. 1108 // For normal compilations, entry_bci is InvocationEntryBci. For on stack 1109 // replacement, entry_bci indicates the bytecode for which to compile a 1110 // continuation. 1111 Compile(ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, 1112 int entry_bci, bool subsume_loads, bool do_escape_analysis, 1113 bool eliminate_boxing); 1114 1115 // Second major entry point. From the TypeFunc signature, generate code 1116 // to pass arguments from the Java calling convention to the C calling 1117 // convention. 1118 Compile(ciEnv* ci_env, const TypeFunc *(*gen)(), 1119 address stub_function, const char *stub_name, 1120 int is_fancy_jump, bool pass_tls, 1121 bool save_arg_registers, bool return_pc); 1122 1123 // From the TypeFunc signature, generate code to pass arguments 1124 // from Compiled calling convention to Interpreter's calling convention 1125 void Generate_Compiled_To_Interpreter_Graph(const TypeFunc *tf, address interpreter_entry); 1126 1127 // From the TypeFunc signature, generate code to pass arguments 1128 // from Interpreter's calling convention to Compiler's calling convention 1129 void Generate_Interpreter_To_Compiled_Graph(const TypeFunc *tf); 1130 1131 // Are we compiling a method? 1132 bool has_method() { return method() != NULL; } 1133 1134 // Maybe print some information about this compile. 1135 void print_compile_messages(); 1136 1137 // Final graph reshaping, a post-pass after the regular optimizer is done. 1138 bool final_graph_reshaping(); 1139 1140 // returns true if adr is completely contained in the given alias category 1141 bool must_alias(const TypePtr* adr, int alias_idx); 1142 1143 // returns true if adr overlaps with the given alias category 1144 bool can_alias(const TypePtr* adr, int alias_idx); 1145 1146 // Driver for converting compiler's IR into machine code bits 1147 void Output(); 1148 1149 // Accessors for node bundling info. 1150 Bundle* node_bundling(const Node *n); 1151 bool valid_bundle_info(const Node *n); 1152 1153 // Schedule and Bundle the instructions 1154 void ScheduleAndBundle(); 1155 1156 // Build OopMaps for each GC point 1157 void BuildOopMaps(); 1158 1159 // Append debug info for the node "local" at safepoint node "sfpt" to the 1160 // "array", May also consult and add to "objs", which describes the 1161 // scalar-replaced objects. 1162 void FillLocArray( int idx, MachSafePointNode* sfpt, 1163 Node *local, GrowableArray<ScopeValue*> *array, 1164 GrowableArray<ScopeValue*> *objs ); 1165 1166 // If "objs" contains an ObjectValue whose id is "id", returns it, else NULL. 1167 static ObjectValue* sv_for_node_id(GrowableArray<ScopeValue*> *objs, int id); 1168 // Requres that "objs" does not contains an ObjectValue whose id matches 1169 // that of "sv. Appends "sv". 1170 static void set_sv_for_object_node(GrowableArray<ScopeValue*> *objs, 1171 ObjectValue* sv ); 1172 1173 // Process an OopMap Element while emitting nodes 1174 void Process_OopMap_Node(MachNode *mach, int code_offset); 1175 1176 // Initialize code buffer 1177 CodeBuffer* init_buffer(uint* blk_starts); 1178 1179 // Write out basic block data to code buffer 1180 void fill_buffer(CodeBuffer* cb, uint* blk_starts); 1181 1182 // Determine which variable sized branches can be shortened 1183 void shorten_branches(uint* blk_starts, int& code_size, int& reloc_size, int& stub_size); 1184 1185 // Compute the size of first NumberOfLoopInstrToAlign instructions 1186 // at the head of a loop. 1187 void compute_loop_first_inst_sizes(); 1188 1189 // Compute the information for the exception tables 1190 void FillExceptionTables(uint cnt, uint *call_returns, uint *inct_starts, Label *blk_labels); 1191 1192 // Stack slots that may be unused by the calling convention but must 1193 // otherwise be preserved. On Intel this includes the return address. 1194 // On PowerPC it includes the 4 words holding the old TOC & LR glue. 1195 uint in_preserve_stack_slots(); 1196 1197 // "Top of Stack" slots that may be unused by the calling convention but must 1198 // otherwise be preserved. 1199 // On Intel these are not necessary and the value can be zero. 1200 // On Sparc this describes the words reserved for storing a register window 1201 // when an interrupt occurs. 1202 static uint out_preserve_stack_slots(); 1203 1204 // Number of outgoing stack slots killed above the out_preserve_stack_slots 1205 // for calls to C. Supports the var-args backing area for register parms. 1206 uint varargs_C_out_slots_killed() const; 1207 1208 // Number of Stack Slots consumed by a synchronization entry 1209 int sync_stack_slots() const; 1210 1211 // Compute the name of old_SP. See <arch>.ad for frame layout. 1212 OptoReg::Name compute_old_SP(); 1213 1214 private: 1215 // Phase control: 1216 void Init(int aliaslevel); // Prepare for a single compilation 1217 int Inline_Warm(); // Find more inlining work. 1218 void Finish_Warm(); // Give up on further inlines. 1219 void Optimize(); // Given a graph, optimize it 1220 void Code_Gen(); // Generate code from a graph 1221 1222 // Management of the AliasType table. 1223 void grow_alias_types(); 1224 AliasCacheEntry* probe_alias_cache(const TypePtr* adr_type); 1225 const TypePtr *flatten_alias_type(const TypePtr* adr_type) const; 1226 AliasType* find_alias_type(const TypePtr* adr_type, bool no_create, ciField* field); 1227 1228 void verify_top(Node*) const PRODUCT_RETURN; 1229 1230 // Intrinsic setup. 1231 void register_library_intrinsics(); // initializer 1232 CallGenerator* make_vm_intrinsic(ciMethod* m, bool is_virtual); // constructor 1233 int intrinsic_insertion_index(ciMethod* m, bool is_virtual); // helper 1234 CallGenerator* find_intrinsic(ciMethod* m, bool is_virtual); // query fn 1235 void register_intrinsic(CallGenerator* cg); // update fn 1236 1237 #ifndef PRODUCT 1238 static juint _intrinsic_hist_count[vmIntrinsics::ID_LIMIT]; 1239 static jubyte _intrinsic_hist_flags[vmIntrinsics::ID_LIMIT]; 1240 #endif 1241 // Function calls made by the public function final_graph_reshaping. 1242 // No need to be made public as they are not called elsewhere. 1243 void final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc); 1244 void final_graph_reshaping_walk( Node_Stack &nstack, Node *root, Final_Reshape_Counts &frc ); 1245 void eliminate_redundant_card_marks(Node* n); 1246 1247 public: 1248 1249 // Note: Histogram array size is about 1 Kb. 1250 enum { // flag bits: 1251 _intrinsic_worked = 1, // succeeded at least once 1252 _intrinsic_failed = 2, // tried it but it failed 1253 _intrinsic_disabled = 4, // was requested but disabled (e.g., -XX:-InlineUnsafeOps) 1254 _intrinsic_virtual = 8, // was seen in the virtual form (rare) 1255 _intrinsic_both = 16 // was seen in the non-virtual form (usual) 1256 }; 1257 // Update histogram. Return boolean if this is a first-time occurrence. 1258 static bool gather_intrinsic_statistics(vmIntrinsics::ID id, 1259 bool is_virtual, int flags) PRODUCT_RETURN0; 1260 static void print_intrinsic_statistics() PRODUCT_RETURN; 1261 1262 // Graph verification code 1263 // Walk the node list, verifying that there is a one-to-one 1264 // correspondence between Use-Def edges and Def-Use edges 1265 // The option no_dead_code enables stronger checks that the 1266 // graph is strongly connected from root in both directions. 1267 void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN; 1268 1269 // Verify GC barrier patterns 1270 void verify_barriers() PRODUCT_RETURN; 1271 1272 // End-of-run dumps. 1273 static void print_statistics() PRODUCT_RETURN; 1274 1275 // Dump formatted assembly 1276 void dump_asm(int *pcs = NULL, uint pc_limit = 0) PRODUCT_RETURN; 1277 void dump_pc(int *pcs, int pc_limit, Node *n); 1278 1279 // Verify ADLC assumptions during startup 1280 static void adlc_verification() PRODUCT_RETURN; 1281 1282 // Definitions of pd methods 1283 static void pd_compiler2_init(); 1284 1285 // Static parse-time type checking logic for gen_subtype_check: 1286 enum { SSC_always_false, SSC_always_true, SSC_easy_test, SSC_full_test }; 1287 int static_subtype_check(ciKlass* superk, ciKlass* subk); 1288 1289 static Node* conv_I2X_index(PhaseGVN *phase, Node* offset, const TypeInt* sizetype); 1290 1291 // Auxiliary method for randomized fuzzing/stressing 1292 static bool randomized_select(int count); 1293 1294 // supporting clone_map 1295 CloneMap& clone_map(); 1296 void set_clone_map(Dict* d); 1297 1298 }; 1299 1300 #endif // SHARE_VM_OPTO_COMPILE_HPP