1 /* 2 * Copyright (c) 1997, 2010, 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 "libadt/dict.hpp" 34 #include "libadt/port.hpp" 35 #include "libadt/vectset.hpp" 36 #include "memory/resourceArea.hpp" 37 #include "opto/idealGraphPrinter.hpp" 38 #include "opto/phase.hpp" 39 #include "opto/regmask.hpp" 40 #include "runtime/deoptimization.hpp" 41 #include "runtime/vmThread.hpp" 42 43 class Block; 44 class Bundle; 45 class C2Compiler; 46 class CallGenerator; 47 class ConnectionGraph; 48 class InlineTree; 49 class Int_Array; 50 class Matcher; 51 class MachConstantNode; 52 class MachConstantBaseNode; 53 class MachNode; 54 class MachOper; 55 class MachSafePointNode; 56 class Node; 57 class Node_Array; 58 class Node_Notes; 59 class OptoReg; 60 class PhaseCFG; 61 class PhaseGVN; 62 class PhaseIterGVN; 63 class PhaseRegAlloc; 64 class PhaseCCP; 65 class PhaseCCP_DCE; 66 class RootNode; 67 class relocInfo; 68 class Scope; 69 class StartNode; 70 class SafePointNode; 71 class JVMState; 72 class TypeData; 73 class TypePtr; 74 class TypeFunc; 75 class Unique_Node_List; 76 class nmethod; 77 class WarmCallInfo; 78 79 //------------------------------Compile---------------------------------------- 80 // This class defines a top-level Compiler invocation. 81 82 class Compile : public Phase { 83 public: 84 // Fixed alias indexes. (See also MergeMemNode.) 85 enum { 86 AliasIdxTop = 1, // pseudo-index, aliases to nothing (used as sentinel value) 87 AliasIdxBot = 2, // pseudo-index, aliases to everything 88 AliasIdxRaw = 3 // hard-wired index for TypeRawPtr::BOTTOM 89 }; 90 91 // Variant of TraceTime(NULL, &_t_accumulator, TimeCompiler); 92 // Integrated with logging. If logging is turned on, and dolog is true, 93 // then brackets are put into the log, with time stamps and node counts. 94 // (The time collection itself is always conditionalized on TimeCompiler.) 95 class TracePhase : public TraceTime { 96 private: 97 Compile* C; 98 CompileLog* _log; 99 public: 100 TracePhase(const char* name, elapsedTimer* accumulator, bool dolog); 101 ~TracePhase(); 102 }; 103 104 // Information per category of alias (memory slice) 105 class AliasType { 106 private: 107 friend class Compile; 108 109 int _index; // unique index, used with MergeMemNode 110 const TypePtr* _adr_type; // normalized address type 111 ciField* _field; // relevant instance field, or null if none 112 bool _is_rewritable; // false if the memory is write-once only 113 int _general_index; // if this is type is an instance, the general 114 // type that this is an instance of 115 116 void Init(int i, const TypePtr* at); 117 118 public: 119 int index() const { return _index; } 120 const TypePtr* adr_type() const { return _adr_type; } 121 ciField* field() const { return _field; } 122 bool is_rewritable() const { return _is_rewritable; } 123 bool is_volatile() const { return (_field ? _field->is_volatile() : false); } 124 int general_index() const { return (_general_index != 0) ? _general_index : _index; } 125 126 void set_rewritable(bool z) { _is_rewritable = z; } 127 void set_field(ciField* f) { 128 assert(!_field,""); 129 _field = f; 130 if (f->is_final()) _is_rewritable = false; 131 } 132 133 void print_on(outputStream* st) PRODUCT_RETURN; 134 }; 135 136 enum { 137 logAliasCacheSize = 6, 138 AliasCacheSize = (1<<logAliasCacheSize) 139 }; 140 struct AliasCacheEntry { const TypePtr* _adr_type; int _index; }; // simple duple type 141 enum { 142 trapHistLength = methodDataOopDesc::_trap_hist_limit 143 }; 144 145 // Constant entry of the constant table. 146 class Constant { 147 private: 148 BasicType _type; 149 jvalue _value; 150 int _offset; // offset of this constant (in bytes) relative to the constant table base. 151 bool _can_be_reused; // true (default) if the value can be shared with other users. 152 153 public: 154 Constant() : _type(T_ILLEGAL), _offset(-1), _can_be_reused(true) { _value.l = 0; } 155 Constant(BasicType type, jvalue value, bool can_be_reused = true) : 156 _type(type), 157 _value(value), 158 _offset(-1), 159 _can_be_reused(can_be_reused) 160 {} 161 162 bool operator==(const Constant& other); 163 164 BasicType type() const { return _type; } 165 166 jlong get_jlong() const { return _value.j; } 167 jfloat get_jfloat() const { return _value.f; } 168 jdouble get_jdouble() const { return _value.d; } 169 jobject get_jobject() const { return _value.l; } 170 171 int offset() const { return _offset; } 172 void set_offset(int offset) { _offset = offset; } 173 174 bool can_be_reused() const { return _can_be_reused; } 175 }; 176 177 // Constant table. 178 class ConstantTable { 179 private: 180 GrowableArray<Constant> _constants; // Constants of this table. 181 int _size; // Size in bytes the emitted constant table takes (including padding). 182 int _table_base_offset; // Offset of the table base that gets added to the constant offsets. 183 184 public: 185 ConstantTable() : 186 _size(-1), 187 _table_base_offset(-1) // We can use -1 here since the constant table is always bigger than 2 bytes (-(size / 2), see MachConstantBaseNode::emit). 188 {} 189 190 int size() const { assert(_size != -1, "size not yet calculated"); return _size; } 191 192 void set_table_base_offset(int x) { assert(_table_base_offset == -1, "set only once"); _table_base_offset = x; } 193 int table_base_offset() const { assert(_table_base_offset != -1, "table base offset not yet set"); return _table_base_offset; } 194 195 void emit(CodeBuffer& cb); 196 197 // Returns the offset of the last entry (the top) of the constant table. 198 int top_offset() const { assert(_constants.top().offset() != -1, "constant not yet bound"); return _constants.top().offset(); } 199 200 void calculate_offsets_and_size(); 201 int find_offset(Constant& con) const; 202 203 void add(Constant& con); 204 Constant add(BasicType type, jvalue value); 205 Constant add(MachOper* oper); 206 Constant add(jfloat f) { 207 jvalue value; value.f = f; 208 return add(T_FLOAT, value); 209 } 210 Constant add(jdouble d) { 211 jvalue value; value.d = d; 212 return add(T_DOUBLE, value); 213 } 214 215 // Jump table 216 Constant allocate_jump_table(MachConstantNode* n); 217 void fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray<Label*> labels) const; 218 }; 219 220 private: 221 // Fixed parameters to this compilation. 222 const int _compile_id; 223 const bool _save_argument_registers; // save/restore arg regs for trampolines 224 const bool _subsume_loads; // Load can be matched as part of a larger op. 225 const bool _do_escape_analysis; // Do escape analysis. 226 ciMethod* _method; // The method being compiled. 227 int _entry_bci; // entry bci for osr methods. 228 const TypeFunc* _tf; // My kind of signature 229 InlineTree* _ilt; // Ditto (temporary). 230 address _stub_function; // VM entry for stub being compiled, or NULL 231 const char* _stub_name; // Name of stub or adapter being compiled, or NULL 232 address _stub_entry_point; // Compile code entry for generated stub, or NULL 233 234 // Control of this compilation. 235 int _num_loop_opts; // Number of iterations for doing loop optimiztions 236 int _max_inline_size; // Max inline size for this compilation 237 int _freq_inline_size; // Max hot method inline size for this compilation 238 int _fixed_slots; // count of frame slots not allocated by the register 239 // allocator i.e. locks, original deopt pc, etc. 240 // For deopt 241 int _orig_pc_slot; 242 int _orig_pc_slot_offset_in_bytes; 243 244 int _major_progress; // Count of something big happening 245 bool _has_loops; // True if the method _may_ have some loops 246 bool _has_split_ifs; // True if the method _may_ have some split-if 247 bool _has_unsafe_access; // True if the method _may_ produce faults in unsafe loads or stores. 248 bool _has_stringbuilder; // True StringBuffers or StringBuilders are allocated 249 uint _trap_hist[trapHistLength]; // Cumulative traps 250 bool _trap_can_recompile; // Have we emitted a recompiling trap? 251 uint _decompile_count; // Cumulative decompilation counts. 252 bool _do_inlining; // True if we intend to do inlining 253 bool _do_scheduling; // True if we intend to do scheduling 254 bool _do_freq_based_layout; // True if we intend to do frequency based block layout 255 bool _do_count_invocations; // True if we generate code to count invocations 256 bool _do_method_data_update; // True if we generate code to update methodDataOops 257 int _AliasLevel; // Locally-adjusted version of AliasLevel flag. 258 bool _print_assembly; // True if we should dump assembly code for this compilation 259 #ifndef PRODUCT 260 bool _trace_opto_output; 261 bool _parsed_irreducible_loop; // True if ciTypeFlow detected irreducible loops during parsing 262 #endif 263 264 // JSR 292 265 bool _has_method_handle_invokes; // True if this method has MethodHandle invokes. 266 267 // Compilation environment. 268 Arena _comp_arena; // Arena with lifetime equivalent to Compile 269 ciEnv* _env; // CI interface 270 CompileLog* _log; // from CompilerThread 271 const char* _failure_reason; // for record_failure/failing pattern 272 GrowableArray<CallGenerator*>* _intrinsics; // List of intrinsics. 273 GrowableArray<Node*>* _macro_nodes; // List of nodes which need to be expanded before matching. 274 GrowableArray<Node*>* _predicate_opaqs; // List of Opaque1 nodes for the loop predicates. 275 ConnectionGraph* _congraph; 276 #ifndef PRODUCT 277 IdealGraphPrinter* _printer; 278 #endif 279 280 // Node management 281 uint _unique; // Counter for unique Node indices 282 debug_only(static int _debug_idx;) // Monotonic counter (not reset), use -XX:BreakAtNode=<idx> 283 Arena _node_arena; // Arena for new-space Nodes 284 Arena _old_arena; // Arena for old-space Nodes, lifetime during xform 285 RootNode* _root; // Unique root of compilation, or NULL after bail-out. 286 Node* _top; // Unique top node. (Reset by various phases.) 287 288 Node* _immutable_memory; // Initial memory state 289 290 Node* _recent_alloc_obj; 291 Node* _recent_alloc_ctl; 292 293 // Constant table 294 ConstantTable _constant_table; // The constant table for this compile. 295 MachConstantBaseNode* _mach_constant_base_node; // Constant table base node singleton. 296 297 298 // Blocked array of debugging and profiling information, 299 // tracked per node. 300 enum { _log2_node_notes_block_size = 8, 301 _node_notes_block_size = (1<<_log2_node_notes_block_size) 302 }; 303 GrowableArray<Node_Notes*>* _node_note_array; 304 Node_Notes* _default_node_notes; // default notes for new nodes 305 306 // After parsing and every bulk phase we hang onto the Root instruction. 307 // The RootNode instruction is where the whole program begins. It produces 308 // the initial Control and BOTTOM for everybody else. 309 310 // Type management 311 Arena _Compile_types; // Arena for all types 312 Arena* _type_arena; // Alias for _Compile_types except in Initialize_shared() 313 Dict* _type_dict; // Intern table 314 void* _type_hwm; // Last allocation (see Type::operator new/delete) 315 size_t _type_last_size; // Last allocation size (see Type::operator new/delete) 316 ciMethod* _last_tf_m; // Cache for 317 const TypeFunc* _last_tf; // TypeFunc::make 318 AliasType** _alias_types; // List of alias types seen so far. 319 int _num_alias_types; // Logical length of _alias_types 320 int _max_alias_types; // Physical length of _alias_types 321 AliasCacheEntry _alias_cache[AliasCacheSize]; // Gets aliases w/o data structure walking 322 323 // Parsing, optimization 324 PhaseGVN* _initial_gvn; // Results of parse-time PhaseGVN 325 Unique_Node_List* _for_igvn; // Initial work-list for next round of Iterative GVN 326 WarmCallInfo* _warm_calls; // Sorted work-list for heat-based inlining. 327 328 GrowableArray<CallGenerator*> _late_inlines; // List of CallGenerators to be revisited after 329 // main parsing has finished. 330 331 // Matching, CFG layout, allocation, code generation 332 PhaseCFG* _cfg; // Results of CFG finding 333 bool _select_24_bit_instr; // We selected an instruction with a 24-bit result 334 bool _in_24_bit_fp_mode; // We are emitting instructions with 24-bit results 335 int _java_calls; // Number of java calls in the method 336 int _inner_loops; // Number of inner loops in the method 337 Matcher* _matcher; // Engine to map ideal to machine instructions 338 PhaseRegAlloc* _regalloc; // Results of register allocation. 339 int _frame_slots; // Size of total frame in stack slots 340 CodeOffsets _code_offsets; // Offsets into the code for various interesting entries 341 RegMask _FIRST_STACK_mask; // All stack slots usable for spills (depends on frame layout) 342 Arena* _indexSet_arena; // control IndexSet allocation within PhaseChaitin 343 void* _indexSet_free_block_list; // free list of IndexSet bit blocks 344 345 uint _node_bundling_limit; 346 Bundle* _node_bundling_base; // Information for instruction bundling 347 348 // Instruction bits passed off to the VM 349 int _method_size; // Size of nmethod code segment in bytes 350 CodeBuffer _code_buffer; // Where the code is assembled 351 int _first_block_size; // Size of unvalidated entry point code / OSR poison code 352 ExceptionHandlerTable _handler_table; // Table of native-code exception handlers 353 ImplicitExceptionTable _inc_table; // Table of implicit null checks in native code 354 OopMapSet* _oop_map_set; // Table of oop maps (one for each safepoint location) 355 static int _CompiledZap_count; // counter compared against CompileZap[First/Last] 356 BufferBlob* _scratch_buffer_blob; // For temporary code buffers. 357 relocInfo* _scratch_locs_memory; // For temporary code buffers. 358 int _scratch_const_size; // For temporary code buffers. 359 bool _in_scratch_emit_size; // true when in scratch_emit_size. 360 361 public: 362 // Accessors 363 364 // The Compile instance currently active in this (compiler) thread. 365 static Compile* current() { 366 return (Compile*) ciEnv::current()->compiler_data(); 367 } 368 369 // ID for this compilation. Useful for setting breakpoints in the debugger. 370 int compile_id() const { return _compile_id; } 371 372 // Does this compilation allow instructions to subsume loads? User 373 // instructions that subsume a load may result in an unschedulable 374 // instruction sequence. 375 bool subsume_loads() const { return _subsume_loads; } 376 // Do escape analysis. 377 bool do_escape_analysis() const { return _do_escape_analysis; } 378 bool save_argument_registers() const { return _save_argument_registers; } 379 380 381 // Other fixed compilation parameters. 382 ciMethod* method() const { return _method; } 383 int entry_bci() const { return _entry_bci; } 384 bool is_osr_compilation() const { return _entry_bci != InvocationEntryBci; } 385 bool is_method_compilation() const { return (_method != NULL && !_method->flags().is_native()); } 386 const TypeFunc* tf() const { assert(_tf!=NULL, ""); return _tf; } 387 void init_tf(const TypeFunc* tf) { assert(_tf==NULL, ""); _tf = tf; } 388 InlineTree* ilt() const { return _ilt; } 389 address stub_function() const { return _stub_function; } 390 const char* stub_name() const { return _stub_name; } 391 address stub_entry_point() const { return _stub_entry_point; } 392 393 // Control of this compilation. 394 int fixed_slots() const { assert(_fixed_slots >= 0, ""); return _fixed_slots; } 395 void set_fixed_slots(int n) { _fixed_slots = n; } 396 int major_progress() const { return _major_progress; } 397 void set_major_progress() { _major_progress++; } 398 void clear_major_progress() { _major_progress = 0; } 399 int num_loop_opts() const { return _num_loop_opts; } 400 void set_num_loop_opts(int n) { _num_loop_opts = n; } 401 int max_inline_size() const { return _max_inline_size; } 402 void set_freq_inline_size(int n) { _freq_inline_size = n; } 403 int freq_inline_size() const { return _freq_inline_size; } 404 void set_max_inline_size(int n) { _max_inline_size = n; } 405 bool has_loops() const { return _has_loops; } 406 void set_has_loops(bool z) { _has_loops = z; } 407 bool has_split_ifs() const { return _has_split_ifs; } 408 void set_has_split_ifs(bool z) { _has_split_ifs = z; } 409 bool has_unsafe_access() const { return _has_unsafe_access; } 410 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } 411 bool has_stringbuilder() const { return _has_stringbuilder; } 412 void set_has_stringbuilder(bool z) { _has_stringbuilder = z; } 413 void set_trap_count(uint r, uint c) { assert(r < trapHistLength, "oob"); _trap_hist[r] = c; } 414 uint trap_count(uint r) const { assert(r < trapHistLength, "oob"); return _trap_hist[r]; } 415 bool trap_can_recompile() const { return _trap_can_recompile; } 416 void set_trap_can_recompile(bool z) { _trap_can_recompile = z; } 417 uint decompile_count() const { return _decompile_count; } 418 void set_decompile_count(uint c) { _decompile_count = c; } 419 bool allow_range_check_smearing() const; 420 bool do_inlining() const { return _do_inlining; } 421 void set_do_inlining(bool z) { _do_inlining = z; } 422 bool do_scheduling() const { return _do_scheduling; } 423 void set_do_scheduling(bool z) { _do_scheduling = z; } 424 bool do_freq_based_layout() const{ return _do_freq_based_layout; } 425 void set_do_freq_based_layout(bool z){ _do_freq_based_layout = z; } 426 bool do_count_invocations() const{ return _do_count_invocations; } 427 void set_do_count_invocations(bool z){ _do_count_invocations = z; } 428 bool do_method_data_update() const { return _do_method_data_update; } 429 void set_do_method_data_update(bool z) { _do_method_data_update = z; } 430 int AliasLevel() const { return _AliasLevel; } 431 bool print_assembly() const { return _print_assembly; } 432 void set_print_assembly(bool z) { _print_assembly = z; } 433 // check the CompilerOracle for special behaviours for this compile 434 bool method_has_option(const char * option) { 435 return method() != NULL && method()->has_option(option); 436 } 437 #ifndef PRODUCT 438 bool trace_opto_output() const { return _trace_opto_output; } 439 bool parsed_irreducible_loop() const { return _parsed_irreducible_loop; } 440 void set_parsed_irreducible_loop(bool z) { _parsed_irreducible_loop = z; } 441 #endif 442 443 // JSR 292 444 bool has_method_handle_invokes() const { return _has_method_handle_invokes; } 445 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } 446 447 void begin_method() { 448 #ifndef PRODUCT 449 if (_printer) _printer->begin_method(this); 450 #endif 451 } 452 void print_method(const char * name, int level = 1) { 453 #ifndef PRODUCT 454 if (_printer) _printer->print_method(this, name, level); 455 #endif 456 } 457 void end_method() { 458 #ifndef PRODUCT 459 if (_printer) _printer->end_method(); 460 #endif 461 } 462 463 int macro_count() { return _macro_nodes->length(); } 464 int predicate_count() { return _predicate_opaqs->length();} 465 Node* macro_node(int idx) { return _macro_nodes->at(idx); } 466 Node* predicate_opaque1_node(int idx) { return _predicate_opaqs->at(idx);} 467 ConnectionGraph* congraph() { return _congraph;} 468 void set_congraph(ConnectionGraph* congraph) { _congraph = congraph;} 469 void add_macro_node(Node * n) { 470 //assert(n->is_macro(), "must be a macro node"); 471 assert(!_macro_nodes->contains(n), " duplicate entry in expand list"); 472 _macro_nodes->append(n); 473 } 474 void remove_macro_node(Node * n) { 475 // this function may be called twice for a node so check 476 // that the node is in the array before attempting to remove it 477 if (_macro_nodes->contains(n)) 478 _macro_nodes->remove(n); 479 // remove from _predicate_opaqs list also if it is there 480 if (predicate_count() > 0 && _predicate_opaqs->contains(n)){ 481 _predicate_opaqs->remove(n); 482 } 483 } 484 void add_predicate_opaq(Node * n) { 485 assert(!_predicate_opaqs->contains(n), " duplicate entry in predicate opaque1"); 486 assert(_macro_nodes->contains(n), "should have already been in macro list"); 487 _predicate_opaqs->append(n); 488 } 489 // remove the opaque nodes that protect the predicates so that the unused checks and 490 // uncommon traps will be eliminated from the graph. 491 void cleanup_loop_predicates(PhaseIterGVN &igvn); 492 493 // Compilation environment. 494 Arena* comp_arena() { return &_comp_arena; } 495 ciEnv* env() const { return _env; } 496 CompileLog* log() const { return _log; } 497 bool failing() const { return _env->failing() || _failure_reason != NULL; } 498 const char* failure_reason() { return _failure_reason; } 499 bool failure_reason_is(const char* r) { return (r==_failure_reason) || (r!=NULL && _failure_reason!=NULL && strcmp(r, _failure_reason)==0); } 500 501 void record_failure(const char* reason); 502 void record_method_not_compilable(const char* reason, bool all_tiers = false) { 503 // All bailouts cover "all_tiers" when TieredCompilation is off. 504 if (!TieredCompilation) all_tiers = true; 505 env()->record_method_not_compilable(reason, all_tiers); 506 // Record failure reason. 507 record_failure(reason); 508 } 509 void record_method_not_compilable_all_tiers(const char* reason) { 510 record_method_not_compilable(reason, true); 511 } 512 bool check_node_count(uint margin, const char* reason) { 513 if (unique() + margin > (uint)MaxNodeLimit) { 514 record_method_not_compilable(reason); 515 return true; 516 } else { 517 return false; 518 } 519 } 520 521 // Node management 522 uint unique() const { return _unique; } 523 uint next_unique() { return _unique++; } 524 void set_unique(uint i) { _unique = i; } 525 static int debug_idx() { return debug_only(_debug_idx)+0; } 526 static void set_debug_idx(int i) { debug_only(_debug_idx = i); } 527 Arena* node_arena() { return &_node_arena; } 528 Arena* old_arena() { return &_old_arena; } 529 RootNode* root() const { return _root; } 530 void set_root(RootNode* r) { _root = r; } 531 StartNode* start() const; // (Derived from root.) 532 void init_start(StartNode* s); 533 Node* immutable_memory(); 534 535 Node* recent_alloc_ctl() const { return _recent_alloc_ctl; } 536 Node* recent_alloc_obj() const { return _recent_alloc_obj; } 537 void set_recent_alloc(Node* ctl, Node* obj) { 538 _recent_alloc_ctl = ctl; 539 _recent_alloc_obj = obj; 540 } 541 542 // Constant table 543 ConstantTable& constant_table() { return _constant_table; } 544 545 MachConstantBaseNode* mach_constant_base_node(); 546 bool has_mach_constant_base_node() const { return _mach_constant_base_node != NULL; } 547 548 // Handy undefined Node 549 Node* top() const { return _top; } 550 551 // these are used by guys who need to know about creation and transformation of top: 552 Node* cached_top_node() { return _top; } 553 void set_cached_top_node(Node* tn); 554 555 GrowableArray<Node_Notes*>* node_note_array() const { return _node_note_array; } 556 void set_node_note_array(GrowableArray<Node_Notes*>* arr) { _node_note_array = arr; } 557 Node_Notes* default_node_notes() const { return _default_node_notes; } 558 void set_default_node_notes(Node_Notes* n) { _default_node_notes = n; } 559 560 Node_Notes* node_notes_at(int idx) { 561 return locate_node_notes(_node_note_array, idx, false); 562 } 563 inline bool set_node_notes_at(int idx, Node_Notes* value); 564 565 // Copy notes from source to dest, if they exist. 566 // Overwrite dest only if source provides something. 567 // Return true if information was moved. 568 bool copy_node_notes_to(Node* dest, Node* source); 569 570 // Workhorse function to sort out the blocked Node_Notes array: 571 inline Node_Notes* locate_node_notes(GrowableArray<Node_Notes*>* arr, 572 int idx, bool can_grow = false); 573 574 void grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by); 575 576 // Type management 577 Arena* type_arena() { return _type_arena; } 578 Dict* type_dict() { return _type_dict; } 579 void* type_hwm() { return _type_hwm; } 580 size_t type_last_size() { return _type_last_size; } 581 int num_alias_types() { return _num_alias_types; } 582 583 void init_type_arena() { _type_arena = &_Compile_types; } 584 void set_type_arena(Arena* a) { _type_arena = a; } 585 void set_type_dict(Dict* d) { _type_dict = d; } 586 void set_type_hwm(void* p) { _type_hwm = p; } 587 void set_type_last_size(size_t sz) { _type_last_size = sz; } 588 589 const TypeFunc* last_tf(ciMethod* m) { 590 return (m == _last_tf_m) ? _last_tf : NULL; 591 } 592 void set_last_tf(ciMethod* m, const TypeFunc* tf) { 593 assert(m != NULL || tf == NULL, ""); 594 _last_tf_m = m; 595 _last_tf = tf; 596 } 597 598 AliasType* alias_type(int idx) { assert(idx < num_alias_types(), "oob"); return _alias_types[idx]; } 599 AliasType* alias_type(const TypePtr* adr_type) { return find_alias_type(adr_type, false); } 600 bool have_alias_type(const TypePtr* adr_type); 601 AliasType* alias_type(ciField* field); 602 603 int get_alias_index(const TypePtr* at) { return alias_type(at)->index(); } 604 const TypePtr* get_adr_type(uint aidx) { return alias_type(aidx)->adr_type(); } 605 int get_general_index(uint aidx) { return alias_type(aidx)->general_index(); } 606 607 // Building nodes 608 void rethrow_exceptions(JVMState* jvms); 609 void return_values(JVMState* jvms); 610 JVMState* build_start_state(StartNode* start, const TypeFunc* tf); 611 612 // Decide how to build a call. 613 // The profile factor is a discount to apply to this site's interp. profile. 614 CallGenerator* call_generator(ciMethod* call_method, int vtable_index, bool call_is_virtual, JVMState* jvms, bool allow_inline, float profile_factor); 615 bool should_delay_inlining(ciMethod* call_method, JVMState* jvms); 616 617 // Report if there were too many traps at a current method and bci. 618 // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded. 619 // If there is no MDO at all, report no trap unless told to assume it. 620 bool too_many_traps(ciMethod* method, int bci, Deoptimization::DeoptReason reason); 621 // This version, unspecific to a particular bci, asks if 622 // PerMethodTrapLimit was exceeded for all inlined methods seen so far. 623 bool too_many_traps(Deoptimization::DeoptReason reason, 624 // Privately used parameter for logging: 625 ciMethodData* logmd = NULL); 626 // Report if there were too many recompiles at a method and bci. 627 bool too_many_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason); 628 629 // Parsing, optimization 630 PhaseGVN* initial_gvn() { return _initial_gvn; } 631 Unique_Node_List* for_igvn() { return _for_igvn; } 632 inline void record_for_igvn(Node* n); // Body is after class Unique_Node_List. 633 void set_initial_gvn(PhaseGVN *gvn) { _initial_gvn = gvn; } 634 void set_for_igvn(Unique_Node_List *for_igvn) { _for_igvn = for_igvn; } 635 636 // Replace n by nn using initial_gvn, calling hash_delete and 637 // record_for_igvn as needed. 638 void gvn_replace_by(Node* n, Node* nn); 639 640 641 void identify_useful_nodes(Unique_Node_List &useful); 642 void remove_useless_nodes (Unique_Node_List &useful); 643 644 WarmCallInfo* warm_calls() const { return _warm_calls; } 645 void set_warm_calls(WarmCallInfo* l) { _warm_calls = l; } 646 WarmCallInfo* pop_warm_call(); 647 648 // Record this CallGenerator for inlining at the end of parsing. 649 void add_late_inline(CallGenerator* cg) { _late_inlines.push(cg); } 650 651 // Matching, CFG layout, allocation, code generation 652 PhaseCFG* cfg() { return _cfg; } 653 bool select_24_bit_instr() const { return _select_24_bit_instr; } 654 bool in_24_bit_fp_mode() const { return _in_24_bit_fp_mode; } 655 bool has_java_calls() const { return _java_calls > 0; } 656 int java_calls() const { return _java_calls; } 657 int inner_loops() const { return _inner_loops; } 658 Matcher* matcher() { return _matcher; } 659 PhaseRegAlloc* regalloc() { return _regalloc; } 660 int frame_slots() const { return _frame_slots; } 661 int frame_size_in_words() const; // frame_slots in units of the polymorphic 'words' 662 RegMask& FIRST_STACK_mask() { return _FIRST_STACK_mask; } 663 Arena* indexSet_arena() { return _indexSet_arena; } 664 void* indexSet_free_block_list() { return _indexSet_free_block_list; } 665 uint node_bundling_limit() { return _node_bundling_limit; } 666 Bundle* node_bundling_base() { return _node_bundling_base; } 667 void set_node_bundling_limit(uint n) { _node_bundling_limit = n; } 668 void set_node_bundling_base(Bundle* b) { _node_bundling_base = b; } 669 bool starts_bundle(const Node *n) const; 670 bool need_stack_bang(int frame_size_in_bytes) const; 671 bool need_register_stack_bang() const; 672 673 void set_matcher(Matcher* m) { _matcher = m; } 674 //void set_regalloc(PhaseRegAlloc* ra) { _regalloc = ra; } 675 void set_indexSet_arena(Arena* a) { _indexSet_arena = a; } 676 void set_indexSet_free_block_list(void* p) { _indexSet_free_block_list = p; } 677 678 // Remember if this compilation changes hardware mode to 24-bit precision 679 void set_24_bit_selection_and_mode(bool selection, bool mode) { 680 _select_24_bit_instr = selection; 681 _in_24_bit_fp_mode = mode; 682 } 683 684 void set_java_calls(int z) { _java_calls = z; } 685 void set_inner_loops(int z) { _inner_loops = z; } 686 687 // Instruction bits passed off to the VM 688 int code_size() { return _method_size; } 689 CodeBuffer* code_buffer() { return &_code_buffer; } 690 int first_block_size() { return _first_block_size; } 691 void set_frame_complete(int off) { _code_offsets.set_value(CodeOffsets::Frame_Complete, off); } 692 ExceptionHandlerTable* handler_table() { return &_handler_table; } 693 ImplicitExceptionTable* inc_table() { return &_inc_table; } 694 OopMapSet* oop_map_set() { return _oop_map_set; } 695 DebugInformationRecorder* debug_info() { return env()->debug_info(); } 696 Dependencies* dependencies() { return env()->dependencies(); } 697 static int CompiledZap_count() { return _CompiledZap_count; } 698 BufferBlob* scratch_buffer_blob() { return _scratch_buffer_blob; } 699 void init_scratch_buffer_blob(int const_size); 700 void clear_scratch_buffer_blob(); 701 void set_scratch_buffer_blob(BufferBlob* b) { _scratch_buffer_blob = b; } 702 relocInfo* scratch_locs_memory() { return _scratch_locs_memory; } 703 void set_scratch_locs_memory(relocInfo* b) { _scratch_locs_memory = b; } 704 705 // emit to scratch blob, report resulting size 706 uint scratch_emit_size(const Node* n); 707 void set_in_scratch_emit_size(bool x) { _in_scratch_emit_size = x; } 708 bool in_scratch_emit_size() const { return _in_scratch_emit_size; } 709 710 enum ScratchBufferBlob { 711 MAX_inst_size = 1024, 712 MAX_locs_size = 128, // number of relocInfo elements 713 MAX_const_size = 128, 714 MAX_stubs_size = 128 715 }; 716 717 // Major entry point. Given a Scope, compile the associated method. 718 // For normal compilations, entry_bci is InvocationEntryBci. For on stack 719 // replacement, entry_bci indicates the bytecode for which to compile a 720 // continuation. 721 Compile(ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, 722 int entry_bci, bool subsume_loads, bool do_escape_analysis); 723 724 // Second major entry point. From the TypeFunc signature, generate code 725 // to pass arguments from the Java calling convention to the C calling 726 // convention. 727 Compile(ciEnv* ci_env, const TypeFunc *(*gen)(), 728 address stub_function, const char *stub_name, 729 int is_fancy_jump, bool pass_tls, 730 bool save_arg_registers, bool return_pc); 731 732 // From the TypeFunc signature, generate code to pass arguments 733 // from Compiled calling convention to Interpreter's calling convention 734 void Generate_Compiled_To_Interpreter_Graph(const TypeFunc *tf, address interpreter_entry); 735 736 // From the TypeFunc signature, generate code to pass arguments 737 // from Interpreter's calling convention to Compiler's calling convention 738 void Generate_Interpreter_To_Compiled_Graph(const TypeFunc *tf); 739 740 // Are we compiling a method? 741 bool has_method() { return method() != NULL; } 742 743 // Maybe print some information about this compile. 744 void print_compile_messages(); 745 746 // Final graph reshaping, a post-pass after the regular optimizer is done. 747 bool final_graph_reshaping(); 748 749 // returns true if adr is completely contained in the given alias category 750 bool must_alias(const TypePtr* adr, int alias_idx); 751 752 // returns true if adr overlaps with the given alias category 753 bool can_alias(const TypePtr* adr, int alias_idx); 754 755 // Driver for converting compiler's IR into machine code bits 756 void Output(); 757 758 // Accessors for node bundling info. 759 Bundle* node_bundling(const Node *n); 760 bool valid_bundle_info(const Node *n); 761 762 // Schedule and Bundle the instructions 763 void ScheduleAndBundle(); 764 765 // Build OopMaps for each GC point 766 void BuildOopMaps(); 767 768 // Append debug info for the node "local" at safepoint node "sfpt" to the 769 // "array", May also consult and add to "objs", which describes the 770 // scalar-replaced objects. 771 void FillLocArray( int idx, MachSafePointNode* sfpt, 772 Node *local, GrowableArray<ScopeValue*> *array, 773 GrowableArray<ScopeValue*> *objs ); 774 775 // If "objs" contains an ObjectValue whose id is "id", returns it, else NULL. 776 static ObjectValue* sv_for_node_id(GrowableArray<ScopeValue*> *objs, int id); 777 // Requres that "objs" does not contains an ObjectValue whose id matches 778 // that of "sv. Appends "sv". 779 static void set_sv_for_object_node(GrowableArray<ScopeValue*> *objs, 780 ObjectValue* sv ); 781 782 // Process an OopMap Element while emitting nodes 783 void Process_OopMap_Node(MachNode *mach, int code_offset); 784 785 // Write out basic block data to code buffer 786 void Fill_buffer(); 787 788 // Determine which variable sized branches can be shortened 789 void Shorten_branches(Label *labels, int& code_size, int& reloc_size, int& stub_size); 790 791 // Compute the size of first NumberOfLoopInstrToAlign instructions 792 // at the head of a loop. 793 void compute_loop_first_inst_sizes(); 794 795 // Compute the information for the exception tables 796 void FillExceptionTables(uint cnt, uint *call_returns, uint *inct_starts, Label *blk_labels); 797 798 // Stack slots that may be unused by the calling convention but must 799 // otherwise be preserved. On Intel this includes the return address. 800 // On PowerPC it includes the 4 words holding the old TOC & LR glue. 801 uint in_preserve_stack_slots(); 802 803 // "Top of Stack" slots that may be unused by the calling convention but must 804 // otherwise be preserved. 805 // On Intel these are not necessary and the value can be zero. 806 // On Sparc this describes the words reserved for storing a register window 807 // when an interrupt occurs. 808 static uint out_preserve_stack_slots(); 809 810 // Number of outgoing stack slots killed above the out_preserve_stack_slots 811 // for calls to C. Supports the var-args backing area for register parms. 812 uint varargs_C_out_slots_killed() const; 813 814 // Number of Stack Slots consumed by a synchronization entry 815 int sync_stack_slots() const; 816 817 // Compute the name of old_SP. See <arch>.ad for frame layout. 818 OptoReg::Name compute_old_SP(); 819 820 #ifdef ENABLE_ZAP_DEAD_LOCALS 821 static bool is_node_getting_a_safepoint(Node*); 822 void Insert_zap_nodes(); 823 Node* call_zap_node(MachSafePointNode* n, int block_no); 824 #endif 825 826 private: 827 // Phase control: 828 void Init(int aliaslevel); // Prepare for a single compilation 829 int Inline_Warm(); // Find more inlining work. 830 void Finish_Warm(); // Give up on further inlines. 831 void Optimize(); // Given a graph, optimize it 832 void Code_Gen(); // Generate code from a graph 833 834 // Management of the AliasType table. 835 void grow_alias_types(); 836 AliasCacheEntry* probe_alias_cache(const TypePtr* adr_type); 837 const TypePtr *flatten_alias_type(const TypePtr* adr_type) const; 838 AliasType* find_alias_type(const TypePtr* adr_type, bool no_create); 839 840 void verify_top(Node*) const PRODUCT_RETURN; 841 842 // Intrinsic setup. 843 void register_library_intrinsics(); // initializer 844 CallGenerator* make_vm_intrinsic(ciMethod* m, bool is_virtual); // constructor 845 int intrinsic_insertion_index(ciMethod* m, bool is_virtual); // helper 846 CallGenerator* find_intrinsic(ciMethod* m, bool is_virtual); // query fn 847 void register_intrinsic(CallGenerator* cg); // update fn 848 849 #ifndef PRODUCT 850 static juint _intrinsic_hist_count[vmIntrinsics::ID_LIMIT]; 851 static jubyte _intrinsic_hist_flags[vmIntrinsics::ID_LIMIT]; 852 #endif 853 854 public: 855 856 // Note: Histogram array size is about 1 Kb. 857 enum { // flag bits: 858 _intrinsic_worked = 1, // succeeded at least once 859 _intrinsic_failed = 2, // tried it but it failed 860 _intrinsic_disabled = 4, // was requested but disabled (e.g., -XX:-InlineUnsafeOps) 861 _intrinsic_virtual = 8, // was seen in the virtual form (rare) 862 _intrinsic_both = 16 // was seen in the non-virtual form (usual) 863 }; 864 // Update histogram. Return boolean if this is a first-time occurrence. 865 static bool gather_intrinsic_statistics(vmIntrinsics::ID id, 866 bool is_virtual, int flags) PRODUCT_RETURN0; 867 static void print_intrinsic_statistics() PRODUCT_RETURN; 868 869 // Graph verification code 870 // Walk the node list, verifying that there is a one-to-one 871 // correspondence between Use-Def edges and Def-Use edges 872 // The option no_dead_code enables stronger checks that the 873 // graph is strongly connected from root in both directions. 874 void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN; 875 876 // Print bytecodes, including the scope inlining tree 877 void print_codes(); 878 879 // End-of-run dumps. 880 static void print_statistics() PRODUCT_RETURN; 881 882 // Dump formatted assembly 883 void dump_asm(int *pcs = NULL, uint pc_limit = 0) PRODUCT_RETURN; 884 void dump_pc(int *pcs, int pc_limit, Node *n); 885 886 // Verify ADLC assumptions during startup 887 static void adlc_verification() PRODUCT_RETURN; 888 889 // Definitions of pd methods 890 static void pd_compiler2_init(); 891 }; 892 893 #endif // SHARE_VM_OPTO_COMPILE_HPP