1 /*
2 * Copyright (c) 1997, 2021, 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_OPTO_COMPILE_HPP
26 #define SHARE_OPTO_COMPILE_HPP
27
28 #include "asm/codeBuffer.hpp"
29 #include "ci/compilerInterface.hpp"
30 #include "code/debugInfoRec.hpp"
31 #include "compiler/compiler_globals.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "compiler/compilerEvent.hpp"
35 #include "libadt/dict.hpp"
36 #include "libadt/vectset.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "oops/methodData.hpp"
39 #include "opto/idealGraphPrinter.hpp"
40 #include "opto/phasetype.hpp"
41 #include "opto/phase.hpp"
42 #include "opto/regmask.hpp"
43 #include "runtime/deoptimization.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/timerTrace.hpp"
46 #include "runtime/vmThread.hpp"
47 #include "utilities/ticks.hpp"
48
49 class AbstractLockNode;
50 class AddPNode;
51 class Block;
52 class Bundle;
53 class CallGenerator;
54 class CloneMap;
55 class ConnectionGraph;
56 class IdealGraphPrinter;
57 class InlineTree;
58 class Int_Array;
59 class Matcher;
60 class MachConstantNode;
61 class MachConstantBaseNode;
62 class MachNode;
63 class MachOper;
64 class MachSafePointNode;
65 class Node;
66 class Node_Array;
67 class Node_List;
68 class Node_Notes;
69 class NodeCloneInfo;
70 class OptoReg;
71 class PhaseCFG;
72 class PhaseGVN;
73 class PhaseIterGVN;
74 class PhaseRegAlloc;
75 class PhaseCCP;
76 class PhaseOutput;
77 class RootNode;
78 class relocInfo;
79 class Scope;
80 class StartNode;
81 class SafePointNode;
82 class JVMState;
83 class Type;
84 class TypeData;
85 class TypeInt;
86 class TypeInteger;
87 class TypePtr;
88 class TypeOopPtr;
89 class TypeFunc;
90 class TypeVect;
91 class Unique_Node_List;
92 class nmethod;
93 class Node_Stack;
94 struct Final_Reshape_Counts;
95
96 enum LoopOptsMode {
97 LoopOptsDefault,
98 LoopOptsNone,
99 LoopOptsMaxUnroll,
100 LoopOptsShenandoahExpand,
101 LoopOptsShenandoahPostExpand,
102 LoopOptsSkipSplitIf,
103 LoopOptsVerify
104 };
105
106 typedef unsigned int node_idx_t;
107 class NodeCloneInfo {
108 private:
109 uint64_t _idx_clone_orig;
110 public:
111
112 void set_idx(node_idx_t idx) {
113 _idx_clone_orig = (_idx_clone_orig & CONST64(0xFFFFFFFF00000000)) | idx;
114 }
115 node_idx_t idx() const { return (node_idx_t)(_idx_clone_orig & 0xFFFFFFFF); }
116
117 void set_gen(int generation) {
118 uint64_t g = (uint64_t)generation << 32;
119 _idx_clone_orig = (_idx_clone_orig & 0xFFFFFFFF) | g;
120 }
121 int gen() const { return (int)(_idx_clone_orig >> 32); }
122
123 void set(uint64_t x) { _idx_clone_orig = x; }
124 void set(node_idx_t x, int g) { set_idx(x); set_gen(g); }
125 uint64_t get() const { return _idx_clone_orig; }
126
127 NodeCloneInfo(uint64_t idx_clone_orig) : _idx_clone_orig(idx_clone_orig) {}
128 NodeCloneInfo(node_idx_t x, int g) : _idx_clone_orig(0) { set(x, g); }
129
130 void dump() const;
131 };
132
133 class CloneMap {
134 friend class Compile;
135 private:
136 bool _debug;
137 Dict* _dict;
138 int _clone_idx; // current cloning iteration/generation in loop unroll
139 public:
140 void* _2p(node_idx_t key) const { return (void*)(intptr_t)key; } // 2 conversion functions to make gcc happy
141 node_idx_t _2_node_idx_t(const void* k) const { return (node_idx_t)(intptr_t)k; }
142 Dict* dict() const { return _dict; }
143 void insert(node_idx_t key, uint64_t val) { assert(_dict->operator[](_2p(key)) == NULL, "key existed"); _dict->Insert(_2p(key), (void*)val); }
144 void insert(node_idx_t key, NodeCloneInfo& ci) { insert(key, ci.get()); }
145 void remove(node_idx_t key) { _dict->Delete(_2p(key)); }
146 uint64_t value(node_idx_t key) const { return (uint64_t)_dict->operator[](_2p(key)); }
147 node_idx_t idx(node_idx_t key) const { return NodeCloneInfo(value(key)).idx(); }
148 int gen(node_idx_t key) const { return NodeCloneInfo(value(key)).gen(); }
149 int gen(const void* k) const { return gen(_2_node_idx_t(k)); }
150 int max_gen() const;
151 void clone(Node* old, Node* nnn, int gen);
152 void verify_insert_and_clone(Node* old, Node* nnn, int gen);
153 void dump(node_idx_t key) const;
154
155 int clone_idx() const { return _clone_idx; }
156 void set_clone_idx(int x) { _clone_idx = x; }
157 bool is_debug() const { return _debug; }
158 void set_debug(bool debug) { _debug = debug; }
159 static const char* debug_option_name;
160
161 bool same_idx(node_idx_t k1, node_idx_t k2) const { return idx(k1) == idx(k2); }
162 bool same_gen(node_idx_t k1, node_idx_t k2) const { return gen(k1) == gen(k2); }
163 };
164
165 //------------------------------Compile----------------------------------------
166 // This class defines a top-level Compiler invocation.
167
168 class Compile : public Phase {
169 friend class VMStructs;
170
171 public:
172 // Fixed alias indexes. (See also MergeMemNode.)
173 enum {
174 AliasIdxTop = 1, // pseudo-index, aliases to nothing (used as sentinel value)
175 AliasIdxBot = 2, // pseudo-index, aliases to everything
176 AliasIdxRaw = 3 // hard-wired index for TypeRawPtr::BOTTOM
177 };
178
179 // Variant of TraceTime(NULL, &_t_accumulator, CITime);
180 // Integrated with logging. If logging is turned on, and CITimeVerbose is true,
181 // then brackets are put into the log, with time stamps and node counts.
182 // (The time collection itself is always conditionalized on CITime.)
183 class TracePhase : public TraceTime {
184 private:
185 Compile* C;
186 CompileLog* _log;
187 const char* _phase_name;
188 bool _dolog;
189 public:
190 TracePhase(const char* name, elapsedTimer* accumulator);
191 ~TracePhase();
192 };
193
194 // Information per category of alias (memory slice)
195 class AliasType {
196 private:
197 friend class Compile;
198
199 int _index; // unique index, used with MergeMemNode
200 const TypePtr* _adr_type; // normalized address type
201 ciField* _field; // relevant instance field, or null if none
202 const Type* _element; // relevant array element type, or null if none
203 bool _is_rewritable; // false if the memory is write-once only
204 int _general_index; // if this is type is an instance, the general
205 // type that this is an instance of
206
207 void Init(int i, const TypePtr* at);
208
209 public:
210 int index() const { return _index; }
211 const TypePtr* adr_type() const { return _adr_type; }
212 ciField* field() const { return _field; }
213 const Type* element() const { return _element; }
214 bool is_rewritable() const { return _is_rewritable; }
215 bool is_volatile() const { return (_field ? _field->is_volatile() : false); }
216 int general_index() const { return (_general_index != 0) ? _general_index : _index; }
217
218 void set_rewritable(bool z) { _is_rewritable = z; }
219 void set_field(ciField* f) {
220 assert(!_field,"");
221 _field = f;
222 if (f->is_final() || f->is_stable()) {
223 // In the case of @Stable, multiple writes are possible but may be assumed to be no-ops.
224 _is_rewritable = false;
225 }
226 }
227 void set_element(const Type* e) {
228 assert(_element == NULL, "");
229 _element = e;
230 }
231
232 BasicType basic_type() const;
233
234 void print_on(outputStream* st) PRODUCT_RETURN;
235 };
236
237 enum {
238 logAliasCacheSize = 6,
239 AliasCacheSize = (1<<logAliasCacheSize)
240 };
241 struct AliasCacheEntry { const TypePtr* _adr_type; int _index; }; // simple duple type
242 enum {
243 trapHistLength = MethodData::_trap_hist_limit
244 };
245
246 private:
247 // Fixed parameters to this compilation.
248 const int _compile_id;
249 const bool _subsume_loads; // Load can be matched as part of a larger op.
250 const bool _do_escape_analysis; // Do escape analysis.
251 const bool _install_code; // Install the code that was compiled
252 const bool _eliminate_boxing; // Do boxing elimination.
253 const bool _do_locks_coarsening; // Do locks coarsening
254 ciMethod* _method; // The method being compiled.
255 int _entry_bci; // entry bci for osr methods.
256 const TypeFunc* _tf; // My kind of signature
257 InlineTree* _ilt; // Ditto (temporary).
258 address _stub_function; // VM entry for stub being compiled, or NULL
259 const char* _stub_name; // Name of stub or adapter being compiled, or NULL
260 address _stub_entry_point; // Compile code entry for generated stub, or NULL
261
262 // Control of this compilation.
263 int _max_inline_size; // Max inline size for this compilation
264 int _freq_inline_size; // Max hot method inline size for this compilation
265 int _fixed_slots; // count of frame slots not allocated by the register
266 // allocator i.e. locks, original deopt pc, etc.
267 uintx _max_node_limit; // Max unique node count during a single compilation.
268
269 bool _post_loop_opts_phase; // Loop opts are finished.
270
271 int _major_progress; // Count of something big happening
272 bool _inlining_progress; // progress doing incremental inlining?
273 bool _inlining_incrementally;// Are we doing incremental inlining (post parse)
274 bool _do_cleanup; // Cleanup is needed before proceeding with incremental inlining
275 bool _has_loops; // True if the method _may_ have some loops
276 bool _has_split_ifs; // True if the method _may_ have some split-if
277 bool _has_unsafe_access; // True if the method _may_ produce faults in unsafe loads or stores.
278 bool _has_stringbuilder; // True StringBuffers or StringBuilders are allocated
279 bool _has_boxed_value; // True if a boxed object is allocated
280 bool _has_reserved_stack_access; // True if the method or an inlined method is annotated with ReservedStackAccess
281 uint _max_vector_size; // Maximum size of generated vectors
282 bool _clear_upper_avx; // Clear upper bits of ymm registers using vzeroupper
283 uint _trap_hist[trapHistLength]; // Cumulative traps
284 bool _trap_can_recompile; // Have we emitted a recompiling trap?
285 uint _decompile_count; // Cumulative decompilation counts.
286 bool _do_inlining; // True if we intend to do inlining
287 bool _do_scheduling; // True if we intend to do scheduling
288 bool _do_freq_based_layout; // True if we intend to do frequency based block layout
289 bool _do_vector_loop; // True if allowed to execute loop in parallel iterations
290 bool _use_cmove; // True if CMove should be used without profitability analysis
291 bool _age_code; // True if we need to profile code age (decrement the aging counter)
292 int _AliasLevel; // Locally-adjusted version of AliasLevel flag.
293 bool _print_assembly; // True if we should dump assembly code for this compilation
294 bool _print_inlining; // True if we should print inlining for this compilation
295 bool _print_intrinsics; // True if we should print intrinsics for this compilation
296 #ifndef PRODUCT
297 uint _igv_idx; // Counter for IGV node identifiers
298 bool _trace_opto_output;
299 bool _print_ideal;
300 bool _parsed_irreducible_loop; // True if ciTypeFlow detected irreducible loops during parsing
301 #endif
302 bool _has_irreducible_loop; // Found irreducible loops
303 // JSR 292
304 bool _has_method_handle_invokes; // True if this method has MethodHandle invokes.
305 uint _max_monitors; // Keep track of maximum number of active monitors in this compilation
306 RTMState _rtm_state; // State of Restricted Transactional Memory usage
307 int _loop_opts_cnt; // loop opts round
308 bool _clinit_barrier_on_entry; // True if clinit barrier is needed on nmethod entry
309 uint _stress_seed; // Seed for stress testing
310
311 // Compilation environment.
312 Arena _comp_arena; // Arena with lifetime equivalent to Compile
313 void* _barrier_set_state; // Potential GC barrier state for Compile
314 ciEnv* _env; // CI interface
315 DirectiveSet* _directive; // Compiler directive
316 CompileLog* _log; // from CompilerThread
317 const char* _failure_reason; // for record_failure/failing pattern
318 GrowableArray<CallGenerator*> _intrinsics; // List of intrinsics.
319 GrowableArray<Node*> _macro_nodes; // List of nodes which need to be expanded before matching.
320 GrowableArray<Node*> _predicate_opaqs; // List of Opaque1 nodes for the loop predicates.
321 GrowableArray<Node*> _skeleton_predicate_opaqs; // List of Opaque4 nodes for the loop skeleton predicates.
322 GrowableArray<Node*> _expensive_nodes; // List of nodes that are expensive to compute and that we'd better not let the GVN freely common
323 GrowableArray<Node*> _for_post_loop_igvn; // List of nodes for IGVN after loop opts are over
324 GrowableArray<Node_List*> _coarsened_locks; // List of coarsened Lock and Unlock nodes
325 ConnectionGraph* _congraph;
326 #ifndef PRODUCT
327 IdealGraphPrinter* _printer;
328 static IdealGraphPrinter* _debug_file_printer;
329 static IdealGraphPrinter* _debug_network_printer;
330 #endif
331
332
333 // Node management
334 uint _unique; // Counter for unique Node indices
335 VectorSet _dead_node_list; // Set of dead nodes
336 uint _dead_node_count; // Number of dead nodes; VectorSet::Size() is O(N).
337 // So use this to keep count and make the call O(1).
338 DEBUG_ONLY(Unique_Node_List* _modified_nodes;) // List of nodes which inputs were modified
339 DEBUG_ONLY(bool _phase_optimize_finished;) // Used for live node verification while creating new nodes
340
341 debug_only(static int _debug_idx;) // Monotonic counter (not reset), use -XX:BreakAtNode=<idx>
342 Arena _node_arena; // Arena for new-space Nodes
343 Arena _old_arena; // Arena for old-space Nodes, lifetime during xform
344 RootNode* _root; // Unique root of compilation, or NULL after bail-out.
345 Node* _top; // Unique top node. (Reset by various phases.)
346
347 Node* _immutable_memory; // Initial memory state
348
349 Node* _recent_alloc_obj;
350 Node* _recent_alloc_ctl;
351
352 // Constant table
353 MachConstantBaseNode* _mach_constant_base_node; // Constant table base node singleton.
354
355
356 // Blocked array of debugging and profiling information,
357 // tracked per node.
358 enum { _log2_node_notes_block_size = 8,
359 _node_notes_block_size = (1<<_log2_node_notes_block_size)
360 };
361 GrowableArray<Node_Notes*>* _node_note_array;
362 Node_Notes* _default_node_notes; // default notes for new nodes
363
364 // After parsing and every bulk phase we hang onto the Root instruction.
365 // The RootNode instruction is where the whole program begins. It produces
366 // the initial Control and BOTTOM for everybody else.
367
368 // Type management
369 Arena _Compile_types; // Arena for all types
370 Arena* _type_arena; // Alias for _Compile_types except in Initialize_shared()
371 Dict* _type_dict; // Intern table
372 CloneMap _clone_map; // used for recording history of cloned nodes
373 size_t _type_last_size; // Last allocation size (see Type::operator new/delete)
374 ciMethod* _last_tf_m; // Cache for
375 const TypeFunc* _last_tf; // TypeFunc::make
376 AliasType** _alias_types; // List of alias types seen so far.
377 int _num_alias_types; // Logical length of _alias_types
378 int _max_alias_types; // Physical length of _alias_types
379 AliasCacheEntry _alias_cache[AliasCacheSize]; // Gets aliases w/o data structure walking
380
381 // Parsing, optimization
382 PhaseGVN* _initial_gvn; // Results of parse-time PhaseGVN
383 Unique_Node_List* _for_igvn; // Initial work-list for next round of Iterative GVN
384
385 GrowableArray<CallGenerator*> _late_inlines; // List of CallGenerators to be revisited after main parsing has finished.
386 GrowableArray<CallGenerator*> _string_late_inlines; // same but for string operations
387 GrowableArray<CallGenerator*> _boxing_late_inlines; // same but for boxing operations
388
389 GrowableArray<CallGenerator*> _vector_reboxing_late_inlines; // same but for vector reboxing operations
390
391 int _late_inlines_pos; // Where in the queue should the next late inlining candidate go (emulate depth first inlining)
392 uint _number_of_mh_late_inlines; // number of method handle late inlining still pending
393
394 GrowableArray<RuntimeStub*> _native_invokers;
395
396 // Inlining may not happen in parse order which would make
397 // PrintInlining output confusing. Keep track of PrintInlining
398 // pieces in order.
399 class PrintInliningBuffer : public CHeapObj<mtCompiler> {
400 private:
401 CallGenerator* _cg;
402 stringStream _ss;
403 static const size_t default_stream_buffer_size = 128;
404
405 public:
406 PrintInliningBuffer()
407 : _cg(NULL), _ss(default_stream_buffer_size) {}
408
409 stringStream* ss() { return &_ss; }
410 CallGenerator* cg() { return _cg; }
411 void set_cg(CallGenerator* cg) { _cg = cg; }
412 };
413
414 stringStream* _print_inlining_stream;
415 GrowableArray<PrintInliningBuffer*>* _print_inlining_list;
416 int _print_inlining_idx;
417 char* _print_inlining_output;
418
419 // Only keep nodes in the expensive node list that need to be optimized
420 void cleanup_expensive_nodes(PhaseIterGVN &igvn);
421 // Use for sorting expensive nodes to bring similar nodes together
422 static int cmp_expensive_nodes(Node** n1, Node** n2);
423 // Expensive nodes list already sorted?
424 bool expensive_nodes_sorted() const;
425 // Remove the speculative part of types and clean up the graph
426 void remove_speculative_types(PhaseIterGVN &igvn);
427
428 void* _replay_inline_data; // Pointer to data loaded from file
429
430 void print_inlining_stream_free();
431 void print_inlining_init();
432 void print_inlining_reinit();
433 void print_inlining_commit();
434 void print_inlining_push();
435 PrintInliningBuffer* print_inlining_current();
436
437 void log_late_inline_failure(CallGenerator* cg, const char* msg);
438 DEBUG_ONLY(bool _exception_backedge;)
439
440 public:
441
442 void* barrier_set_state() const { return _barrier_set_state; }
443
444 outputStream* print_inlining_stream() const {
445 assert(print_inlining() || print_intrinsics(), "PrintInlining off?");
446 return _print_inlining_stream;
447 }
448
449 void print_inlining_update(CallGenerator* cg);
450 void print_inlining_update_delayed(CallGenerator* cg);
451 void print_inlining_move_to(CallGenerator* cg);
452 void print_inlining_assert_ready();
453 void print_inlining_reset();
454
455 void print_inlining(ciMethod* method, int inline_level, int bci, const char* msg = NULL) {
456 stringStream ss;
457 CompileTask::print_inlining_inner(&ss, method, inline_level, bci, msg);
458 print_inlining_stream()->print("%s", ss.as_string());
459 }
460
461 #ifndef PRODUCT
462 IdealGraphPrinter* printer() { return _printer; }
463 #endif
464
465 void log_late_inline(CallGenerator* cg);
466 void log_inline_id(CallGenerator* cg);
467 void log_inline_failure(const char* msg);
468
469 void* replay_inline_data() const { return _replay_inline_data; }
470
471 // Dump inlining replay data to the stream.
472 void dump_inline_data(outputStream* out);
473
474 private:
475 // Matching, CFG layout, allocation, code generation
476 PhaseCFG* _cfg; // Results of CFG finding
477 int _java_calls; // Number of java calls in the method
478 int _inner_loops; // Number of inner loops in the method
479 Matcher* _matcher; // Engine to map ideal to machine instructions
480 PhaseRegAlloc* _regalloc; // Results of register allocation.
481 RegMask _FIRST_STACK_mask; // All stack slots usable for spills (depends on frame layout)
482 Arena* _indexSet_arena; // control IndexSet allocation within PhaseChaitin
483 void* _indexSet_free_block_list; // free list of IndexSet bit blocks
484 int _interpreter_frame_size;
485
486 PhaseOutput* _output;
487
488 public:
489 // Accessors
490
491 // The Compile instance currently active in this (compiler) thread.
492 static Compile* current() {
493 return (Compile*) ciEnv::current()->compiler_data();
494 }
495
496 int interpreter_frame_size() const { return _interpreter_frame_size; }
497
498 PhaseOutput* output() const { return _output; }
499 void set_output(PhaseOutput* o) { _output = o; }
500
501 // ID for this compilation. Useful for setting breakpoints in the debugger.
502 int compile_id() const { return _compile_id; }
503 DirectiveSet* directive() const { return _directive; }
504
505 // Does this compilation allow instructions to subsume loads? User
506 // instructions that subsume a load may result in an unschedulable
507 // instruction sequence.
508 bool subsume_loads() const { return _subsume_loads; }
509 /** Do escape analysis. */
510 bool do_escape_analysis() const { return _do_escape_analysis; }
511 /** Do boxing elimination. */
512 bool eliminate_boxing() const { return _eliminate_boxing; }
513 /** Do aggressive boxing elimination. */
514 bool aggressive_unboxing() const { return _eliminate_boxing && AggressiveUnboxing; }
515 bool should_install_code() const { return _install_code; }
516 /** Do locks coarsening. */
517 bool do_locks_coarsening() const { return _do_locks_coarsening; }
518
519 // Other fixed compilation parameters.
520 ciMethod* method() const { return _method; }
521 int entry_bci() const { return _entry_bci; }
522 bool is_osr_compilation() const { return _entry_bci != InvocationEntryBci; }
523 bool is_method_compilation() const { return (_method != NULL && !_method->flags().is_native()); }
524 const TypeFunc* tf() const { assert(_tf!=NULL, ""); return _tf; }
525 void init_tf(const TypeFunc* tf) { assert(_tf==NULL, ""); _tf = tf; }
526 InlineTree* ilt() const { return _ilt; }
527 address stub_function() const { return _stub_function; }
528 const char* stub_name() const { return _stub_name; }
529 address stub_entry_point() const { return _stub_entry_point; }
530 void set_stub_entry_point(address z) { _stub_entry_point = z; }
531
532 // Control of this compilation.
533 int fixed_slots() const { assert(_fixed_slots >= 0, ""); return _fixed_slots; }
534 void set_fixed_slots(int n) { _fixed_slots = n; }
535 int major_progress() const { return _major_progress; }
536 void set_inlining_progress(bool z) { _inlining_progress = z; }
537 int inlining_progress() const { return _inlining_progress; }
538 void set_inlining_incrementally(bool z) { _inlining_incrementally = z; }
539 int inlining_incrementally() const { return _inlining_incrementally; }
540 void set_do_cleanup(bool z) { _do_cleanup = z; }
541 int do_cleanup() const { return _do_cleanup; }
542 void set_major_progress() { _major_progress++; }
543 void restore_major_progress(int progress) { _major_progress += progress; }
544 void clear_major_progress() { _major_progress = 0; }
545 int max_inline_size() const { return _max_inline_size; }
546 void set_freq_inline_size(int n) { _freq_inline_size = n; }
547 int freq_inline_size() const { return _freq_inline_size; }
548 void set_max_inline_size(int n) { _max_inline_size = n; }
549 bool has_loops() const { return _has_loops; }
550 void set_has_loops(bool z) { _has_loops = z; }
551 bool has_split_ifs() const { return _has_split_ifs; }
552 void set_has_split_ifs(bool z) { _has_split_ifs = z; }
553 bool has_unsafe_access() const { return _has_unsafe_access; }
554 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; }
555 bool has_stringbuilder() const { return _has_stringbuilder; }
556 void set_has_stringbuilder(bool z) { _has_stringbuilder = z; }
557 bool has_boxed_value() const { return _has_boxed_value; }
558 void set_has_boxed_value(bool z) { _has_boxed_value = z; }
559 bool has_reserved_stack_access() const { return _has_reserved_stack_access; }
560 void set_has_reserved_stack_access(bool z) { _has_reserved_stack_access = z; }
561 uint max_vector_size() const { return _max_vector_size; }
562 void set_max_vector_size(uint s) { _max_vector_size = s; }
563 bool clear_upper_avx() const { return _clear_upper_avx; }
564 void set_clear_upper_avx(bool s) { _clear_upper_avx = s; }
565 void set_trap_count(uint r, uint c) { assert(r < trapHistLength, "oob"); _trap_hist[r] = c; }
566 uint trap_count(uint r) const { assert(r < trapHistLength, "oob"); return _trap_hist[r]; }
567 bool trap_can_recompile() const { return _trap_can_recompile; }
568 void set_trap_can_recompile(bool z) { _trap_can_recompile = z; }
569 uint decompile_count() const { return _decompile_count; }
570 void set_decompile_count(uint c) { _decompile_count = c; }
571 bool allow_range_check_smearing() const;
572 bool do_inlining() const { return _do_inlining; }
573 void set_do_inlining(bool z) { _do_inlining = z; }
574 bool do_scheduling() const { return _do_scheduling; }
575 void set_do_scheduling(bool z) { _do_scheduling = z; }
576 bool do_freq_based_layout() const{ return _do_freq_based_layout; }
577 void set_do_freq_based_layout(bool z){ _do_freq_based_layout = z; }
578 bool do_vector_loop() const { return _do_vector_loop; }
579 void set_do_vector_loop(bool z) { _do_vector_loop = z; }
580 bool use_cmove() const { return _use_cmove; }
581 void set_use_cmove(bool z) { _use_cmove = z; }
582 bool age_code() const { return _age_code; }
583 void set_age_code(bool z) { _age_code = z; }
584 int AliasLevel() const { return _AliasLevel; }
585 bool print_assembly() const { return _print_assembly; }
586 void set_print_assembly(bool z) { _print_assembly = z; }
587 bool print_inlining() const { return _print_inlining; }
588 void set_print_inlining(bool z) { _print_inlining = z; }
589 bool print_intrinsics() const { return _print_intrinsics; }
590 void set_print_intrinsics(bool z) { _print_intrinsics = z; }
591 RTMState rtm_state() const { return _rtm_state; }
592 void set_rtm_state(RTMState s) { _rtm_state = s; }
593 bool use_rtm() const { return (_rtm_state & NoRTM) == 0; }
594 bool profile_rtm() const { return _rtm_state == ProfileRTM; }
595 uint max_node_limit() const { return (uint)_max_node_limit; }
596 void set_max_node_limit(uint n) { _max_node_limit = n; }
597 bool clinit_barrier_on_entry() { return _clinit_barrier_on_entry; }
598 void set_clinit_barrier_on_entry(bool z) { _clinit_barrier_on_entry = z; }
599
600 void push_monitor() { _max_monitors++; }
601 void reset_max_monitors() { _max_monitors = 0; }
602 uint max_monitors() { return _max_monitors; }
603
604 // check the CompilerOracle for special behaviours for this compile
605 bool method_has_option(enum CompileCommand option) {
606 return method() != NULL && method()->has_option(option);
607 }
608
609 #ifndef PRODUCT
610 uint next_igv_idx() { return _igv_idx++; }
611 bool trace_opto_output() const { return _trace_opto_output; }
612 bool print_ideal() const { return _print_ideal; }
613 bool parsed_irreducible_loop() const { return _parsed_irreducible_loop; }
614 void set_parsed_irreducible_loop(bool z) { _parsed_irreducible_loop = z; }
615 int _in_dump_cnt; // Required for dumping ir nodes.
616 #endif
617 bool has_irreducible_loop() const { return _has_irreducible_loop; }
618 void set_has_irreducible_loop(bool z) { _has_irreducible_loop = z; }
619
620 // JSR 292
621 bool has_method_handle_invokes() const { return _has_method_handle_invokes; }
622 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; }
623
624 Ticks _latest_stage_start_counter;
625
626 void begin_method(int level = 1) {
627 #ifndef PRODUCT
628 if (_method != NULL && should_print(level)) {
629 _printer->begin_method();
630 }
631 #endif
632 C->_latest_stage_start_counter.stamp();
633 }
634
635 bool should_print(int level = 1) {
636 #ifndef PRODUCT
637 if (PrintIdealGraphLevel < 0) { // disabled by the user
638 return false;
639 }
640
641 bool need = directive()->IGVPrintLevelOption >= level;
642 if (need && !_printer) {
643 _printer = IdealGraphPrinter::printer();
644 assert(_printer != NULL, "_printer is NULL when we need it!");
645 _printer->set_compile(this);
646 }
647 return need;
648 #else
649 return false;
650 #endif
651 }
652
653 void print_method(CompilerPhaseType cpt, const char *name, int level = 1);
654 void print_method(CompilerPhaseType cpt, int level = 1, int idx = 0);
655 void print_method(CompilerPhaseType cpt, Node* n, int level = 3);
656
657 #ifndef PRODUCT
658 void igv_print_method_to_file(const char* phase_name = "Debug", bool append = false);
659 void igv_print_method_to_network(const char* phase_name = "Debug");
660 static IdealGraphPrinter* debug_file_printer() { return _debug_file_printer; }
661 static IdealGraphPrinter* debug_network_printer() { return _debug_network_printer; }
662 #endif
663
664 void end_method(int level = 1);
665
666 int macro_count() const { return _macro_nodes.length(); }
667 int predicate_count() const { return _predicate_opaqs.length(); }
668 int skeleton_predicate_count() const { return _skeleton_predicate_opaqs.length(); }
669 int expensive_count() const { return _expensive_nodes.length(); }
670 int coarsened_count() const { return _coarsened_locks.length(); }
671
672 Node* macro_node(int idx) const { return _macro_nodes.at(idx); }
673 Node* predicate_opaque1_node(int idx) const { return _predicate_opaqs.at(idx); }
674 Node* skeleton_predicate_opaque4_node(int idx) const { return _skeleton_predicate_opaqs.at(idx); }
675 Node* expensive_node(int idx) const { return _expensive_nodes.at(idx); }
676
677 ConnectionGraph* congraph() { return _congraph;}
678 void set_congraph(ConnectionGraph* congraph) { _congraph = congraph;}
679 void add_macro_node(Node * n) {
680 //assert(n->is_macro(), "must be a macro node");
681 assert(!_macro_nodes.contains(n), "duplicate entry in expand list");
682 _macro_nodes.append(n);
683 }
684 void remove_macro_node(Node* n) {
685 // this function may be called twice for a node so we can only remove it
686 // if it's still existing.
687 _macro_nodes.remove_if_existing(n);
688 // remove from _predicate_opaqs list also if it is there
689 if (predicate_count() > 0) {
690 _predicate_opaqs.remove_if_existing(n);
691 }
692 // Remove from coarsened locks list if present
693 if (coarsened_count() > 0) {
694 remove_coarsened_lock(n);
695 }
696 }
697 void add_expensive_node(Node* n);
698 void remove_expensive_node(Node* n) {
699 _expensive_nodes.remove_if_existing(n);
700 }
701 void add_predicate_opaq(Node* n) {
702 assert(!_predicate_opaqs.contains(n), "duplicate entry in predicate opaque1");
703 assert(_macro_nodes.contains(n), "should have already been in macro list");
704 _predicate_opaqs.append(n);
705 }
706 void add_skeleton_predicate_opaq(Node* n) {
707 assert(!_skeleton_predicate_opaqs.contains(n), "duplicate entry in skeleton predicate opaque4 list");
708 _skeleton_predicate_opaqs.append(n);
709 }
710 void remove_skeleton_predicate_opaq(Node* n) {
711 if (skeleton_predicate_count() > 0) {
712 _skeleton_predicate_opaqs.remove_if_existing(n);
713 }
714 }
715 void add_coarsened_locks(GrowableArray<AbstractLockNode*>& locks);
716 void remove_coarsened_lock(Node* n);
717 bool coarsened_locks_consistent();
718
719 bool post_loop_opts_phase() { return _post_loop_opts_phase; }
720 void set_post_loop_opts_phase() { _post_loop_opts_phase = true; }
721 void reset_post_loop_opts_phase() { _post_loop_opts_phase = false; }
722
723 void record_for_post_loop_opts_igvn(Node* n);
724 void remove_from_post_loop_opts_igvn(Node* n);
725 void process_for_post_loop_opts_igvn(PhaseIterGVN& igvn);
726
727 void sort_macro_nodes();
728
729 // remove the opaque nodes that protect the predicates so that the unused checks and
730 // uncommon traps will be eliminated from the graph.
731 void cleanup_loop_predicates(PhaseIterGVN &igvn);
732 bool is_predicate_opaq(Node* n) {
733 return _predicate_opaqs.contains(n);
734 }
735
736 // Are there candidate expensive nodes for optimization?
737 bool should_optimize_expensive_nodes(PhaseIterGVN &igvn);
738 // Check whether n1 and n2 are similar
739 static int cmp_expensive_nodes(Node* n1, Node* n2);
740 // Sort expensive nodes to locate similar expensive nodes
741 void sort_expensive_nodes();
742
743 // Compilation environment.
744 Arena* comp_arena() { return &_comp_arena; }
745 ciEnv* env() const { return _env; }
746 CompileLog* log() const { return _log; }
747 bool failing() const { return _env->failing() || _failure_reason != NULL; }
748 const char* failure_reason() const { return (_env->failing()) ? _env->failure_reason() : _failure_reason; }
749
750 bool failure_reason_is(const char* r) const {
751 return (r == _failure_reason) || (r != NULL && _failure_reason != NULL && strcmp(r, _failure_reason) == 0);
752 }
753
754 void record_failure(const char* reason);
755 void record_method_not_compilable(const char* reason) {
756 env()->record_method_not_compilable(reason);
757 // Record failure reason.
758 record_failure(reason);
759 }
760 bool check_node_count(uint margin, const char* reason) {
761 if (live_nodes() + margin > max_node_limit()) {
762 record_method_not_compilable(reason);
763 return true;
764 } else {
765 return false;
766 }
767 }
768
769 // Node management
770 uint unique() const { return _unique; }
771 uint next_unique() { return _unique++; }
772 void set_unique(uint i) { _unique = i; }
773 static int debug_idx() { return debug_only(_debug_idx)+0; }
774 static void set_debug_idx(int i) { debug_only(_debug_idx = i); }
775 Arena* node_arena() { return &_node_arena; }
776 Arena* old_arena() { return &_old_arena; }
777 RootNode* root() const { return _root; }
778 void set_root(RootNode* r) { _root = r; }
779 StartNode* start() const; // (Derived from root.)
780 void init_start(StartNode* s);
781 Node* immutable_memory();
782
783 Node* recent_alloc_ctl() const { return _recent_alloc_ctl; }
784 Node* recent_alloc_obj() const { return _recent_alloc_obj; }
785 void set_recent_alloc(Node* ctl, Node* obj) {
786 _recent_alloc_ctl = ctl;
787 _recent_alloc_obj = obj;
788 }
789 void record_dead_node(uint idx) { if (_dead_node_list.test_set(idx)) return;
790 _dead_node_count++;
791 }
792 void reset_dead_node_list() { _dead_node_list.reset();
793 _dead_node_count = 0;
794 }
795 uint live_nodes() const {
796 int val = _unique - _dead_node_count;
797 assert (val >= 0, "number of tracked dead nodes %d more than created nodes %d", _unique, _dead_node_count);
798 return (uint) val;
799 }
800 #ifdef ASSERT
801 void set_phase_optimize_finished() { _phase_optimize_finished = true; }
802 bool phase_optimize_finished() const { return _phase_optimize_finished; }
803 uint count_live_nodes_by_graph_walk();
804 void print_missing_nodes();
805 #endif
806
807 // Record modified nodes to check that they are put on IGVN worklist
808 void record_modified_node(Node* n) NOT_DEBUG_RETURN;
809 void remove_modified_node(Node* n) NOT_DEBUG_RETURN;
810 DEBUG_ONLY( Unique_Node_List* modified_nodes() const { return _modified_nodes; } )
811
812 MachConstantBaseNode* mach_constant_base_node();
813 bool has_mach_constant_base_node() const { return _mach_constant_base_node != NULL; }
814 // Generated by adlc, true if CallNode requires MachConstantBase.
815 bool needs_deep_clone_jvms();
816
817 // Handy undefined Node
818 Node* top() const { return _top; }
819
820 // these are used by guys who need to know about creation and transformation of top:
821 Node* cached_top_node() { return _top; }
822 void set_cached_top_node(Node* tn);
823
824 GrowableArray<Node_Notes*>* node_note_array() const { return _node_note_array; }
825 void set_node_note_array(GrowableArray<Node_Notes*>* arr) { _node_note_array = arr; }
826 Node_Notes* default_node_notes() const { return _default_node_notes; }
827 void set_default_node_notes(Node_Notes* n) { _default_node_notes = n; }
828
829 Node_Notes* node_notes_at(int idx) {
830 return locate_node_notes(_node_note_array, idx, false);
831 }
832 inline bool set_node_notes_at(int idx, Node_Notes* value);
833
834 // Copy notes from source to dest, if they exist.
835 // Overwrite dest only if source provides something.
836 // Return true if information was moved.
837 bool copy_node_notes_to(Node* dest, Node* source);
838
839 // Workhorse function to sort out the blocked Node_Notes array:
840 inline Node_Notes* locate_node_notes(GrowableArray<Node_Notes*>* arr,
841 int idx, bool can_grow = false);
842
843 void grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by);
844
845 // Type management
846 Arena* type_arena() { return _type_arena; }
847 Dict* type_dict() { return _type_dict; }
848 size_t type_last_size() { return _type_last_size; }
849 int num_alias_types() { return _num_alias_types; }
850
851 void init_type_arena() { _type_arena = &_Compile_types; }
852 void set_type_arena(Arena* a) { _type_arena = a; }
853 void set_type_dict(Dict* d) { _type_dict = d; }
854 void set_type_last_size(size_t sz) { _type_last_size = sz; }
855
856 const TypeFunc* last_tf(ciMethod* m) {
857 return (m == _last_tf_m) ? _last_tf : NULL;
858 }
859 void set_last_tf(ciMethod* m, const TypeFunc* tf) {
860 assert(m != NULL || tf == NULL, "");
861 _last_tf_m = m;
862 _last_tf = tf;
863 }
864
865 AliasType* alias_type(int idx) { assert(idx < num_alias_types(), "oob"); return _alias_types[idx]; }
866 AliasType* alias_type(const TypePtr* adr_type, ciField* field = NULL) { return find_alias_type(adr_type, false, field); }
867 bool have_alias_type(const TypePtr* adr_type);
868 AliasType* alias_type(ciField* field);
869
870 int get_alias_index(const TypePtr* at) { return alias_type(at)->index(); }
871 const TypePtr* get_adr_type(uint aidx) { return alias_type(aidx)->adr_type(); }
872 int get_general_index(uint aidx) { return alias_type(aidx)->general_index(); }
873
874 // Building nodes
875 void rethrow_exceptions(JVMState* jvms);
876 void return_values(JVMState* jvms);
877 JVMState* build_start_state(StartNode* start, const TypeFunc* tf);
878
879 // Decide how to build a call.
880 // The profile factor is a discount to apply to this site's interp. profile.
881 CallGenerator* call_generator(ciMethod* call_method, int vtable_index, bool call_does_dispatch,
882 JVMState* jvms, bool allow_inline, float profile_factor, ciKlass* speculative_receiver_type = NULL,
883 bool allow_intrinsics = true);
884 bool should_delay_inlining(ciMethod* call_method, JVMState* jvms) {
885 return should_delay_string_inlining(call_method, jvms) ||
886 should_delay_boxing_inlining(call_method, jvms) ||
887 should_delay_vector_inlining(call_method, jvms);
888 }
889 bool should_delay_string_inlining(ciMethod* call_method, JVMState* jvms);
890 bool should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms);
891 bool should_delay_vector_inlining(ciMethod* call_method, JVMState* jvms);
892 bool should_delay_vector_reboxing_inlining(ciMethod* call_method, JVMState* jvms);
893
894 // Helper functions to identify inlining potential at call-site
895 ciMethod* optimize_virtual_call(ciMethod* caller, ciInstanceKlass* klass,
896 ciKlass* holder, ciMethod* callee,
897 const TypeOopPtr* receiver_type, bool is_virtual,
898 bool &call_does_dispatch, int &vtable_index,
899 bool check_access = true);
900 ciMethod* optimize_inlining(ciMethod* caller, ciInstanceKlass* klass, ciKlass* holder,
901 ciMethod* callee, const TypeOopPtr* receiver_type,
902 bool check_access = true);
903
904 // Report if there were too many traps at a current method and bci.
905 // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded.
906 // If there is no MDO at all, report no trap unless told to assume it.
907 bool too_many_traps(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
908 // This version, unspecific to a particular bci, asks if
909 // PerMethodTrapLimit was exceeded for all inlined methods seen so far.
910 bool too_many_traps(Deoptimization::DeoptReason reason,
911 // Privately used parameter for logging:
912 ciMethodData* logmd = NULL);
913 // Report if there were too many recompiles at a method and bci.
914 bool too_many_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
915 // Report if there were too many traps or recompiles at a method and bci.
916 bool too_many_traps_or_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason) {
917 return too_many_traps(method, bci, reason) ||
918 too_many_recompiles(method, bci, reason);
919 }
920 // Return a bitset with the reasons where deoptimization is allowed,
921 // i.e., where there were not too many uncommon traps.
922 int _allowed_reasons;
923 int allowed_deopt_reasons() { return _allowed_reasons; }
924 void set_allowed_deopt_reasons();
925
926 // Parsing, optimization
927 PhaseGVN* initial_gvn() { return _initial_gvn; }
928 Unique_Node_List* for_igvn() { return _for_igvn; }
929 inline void record_for_igvn(Node* n); // Body is after class Unique_Node_List.
930 void set_initial_gvn(PhaseGVN *gvn) { _initial_gvn = gvn; }
931 void set_for_igvn(Unique_Node_List *for_igvn) { _for_igvn = for_igvn; }
932
933 // Replace n by nn using initial_gvn, calling hash_delete and
934 // record_for_igvn as needed.
935 void gvn_replace_by(Node* n, Node* nn);
936
937
938 void identify_useful_nodes(Unique_Node_List &useful);
939 void update_dead_node_list(Unique_Node_List &useful);
940 void disconnect_useless_nodes(Unique_Node_List &useful, Unique_Node_List* worklist);
941
942 void remove_useless_node(Node* dead);
943
944 // Record this CallGenerator for inlining at the end of parsing.
945 void add_late_inline(CallGenerator* cg) {
946 _late_inlines.insert_before(_late_inlines_pos, cg);
947 _late_inlines_pos++;
948 }
949
950 void prepend_late_inline(CallGenerator* cg) {
951 _late_inlines.insert_before(0, cg);
952 }
953
954 void add_string_late_inline(CallGenerator* cg) {
955 _string_late_inlines.push(cg);
956 }
957
958 void add_boxing_late_inline(CallGenerator* cg) {
959 _boxing_late_inlines.push(cg);
960 }
961
962 void add_vector_reboxing_late_inline(CallGenerator* cg) {
963 _vector_reboxing_late_inlines.push(cg);
964 }
965
966 void add_native_invoker(RuntimeStub* stub);
967
968 const GrowableArray<RuntimeStub*> native_invokers() const { return _native_invokers; }
969
970 void remove_useless_nodes (GrowableArray<Node*>& node_list, Unique_Node_List &useful);
971
972 void remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful);
973 void remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Node* dead);
974
975 void remove_useless_coarsened_locks(Unique_Node_List& useful);
976
977 void process_print_inlining();
978 void dump_print_inlining();
979
980 bool over_inlining_cutoff() const {
981 if (!inlining_incrementally()) {
982 return unique() > (uint)NodeCountInliningCutoff;
983 } else {
984 // Give some room for incremental inlining algorithm to "breathe"
985 // and avoid thrashing when live node count is close to the limit.
986 // Keep in mind that live_nodes() isn't accurate during inlining until
987 // dead node elimination step happens (see Compile::inline_incrementally).
988 return live_nodes() > (uint)LiveNodeCountInliningCutoff * 11 / 10;
989 }
990 }
991
992 void inc_number_of_mh_late_inlines() { _number_of_mh_late_inlines++; }
993 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--; }
994 bool has_mh_late_inlines() const { return _number_of_mh_late_inlines > 0; }
995
996 bool inline_incrementally_one();
997 void inline_incrementally_cleanup(PhaseIterGVN& igvn);
998 void inline_incrementally(PhaseIterGVN& igvn);
999 void inline_string_calls(bool parse_time);
1000 void inline_boxing_calls(PhaseIterGVN& igvn);
1001 bool optimize_loops(PhaseIterGVN& igvn, LoopOptsMode mode);
1002 void remove_root_to_sfpts_edges(PhaseIterGVN& igvn);
1003
1004 void inline_vector_reboxing_calls();
1005 bool has_vbox_nodes();
1006
1007 void process_late_inline_calls_no_inline(PhaseIterGVN& igvn);
1008
1009 // Matching, CFG layout, allocation, code generation
1010 PhaseCFG* cfg() { return _cfg; }
1011 bool has_java_calls() const { return _java_calls > 0; }
1012 int java_calls() const { return _java_calls; }
1013 int inner_loops() const { return _inner_loops; }
1014 Matcher* matcher() { return _matcher; }
1015 PhaseRegAlloc* regalloc() { return _regalloc; }
1016 RegMask& FIRST_STACK_mask() { return _FIRST_STACK_mask; }
1017 Arena* indexSet_arena() { return _indexSet_arena; }
1018 void* indexSet_free_block_list() { return _indexSet_free_block_list; }
1019 DebugInformationRecorder* debug_info() { return env()->debug_info(); }
1020
1021 void update_interpreter_frame_size(int size) {
1022 if (_interpreter_frame_size < size) {
1023 _interpreter_frame_size = size;
1024 }
1025 }
1026
1027 void set_matcher(Matcher* m) { _matcher = m; }
1028 //void set_regalloc(PhaseRegAlloc* ra) { _regalloc = ra; }
1029 void set_indexSet_arena(Arena* a) { _indexSet_arena = a; }
1030 void set_indexSet_free_block_list(void* p) { _indexSet_free_block_list = p; }
1031
1032 void set_java_calls(int z) { _java_calls = z; }
1033 void set_inner_loops(int z) { _inner_loops = z; }
1034
1035 Dependencies* dependencies() { return env()->dependencies(); }
1036
1037 // Major entry point. Given a Scope, compile the associated method.
1038 // For normal compilations, entry_bci is InvocationEntryBci. For on stack
1039 // replacement, entry_bci indicates the bytecode for which to compile a
1040 // continuation.
1041 Compile(ciEnv* ci_env, ciMethod* target,
1042 int entry_bci, bool subsume_loads, bool do_escape_analysis,
1043 bool eliminate_boxing, bool do_locks_coarsening,
1044 bool install_code, DirectiveSet* directive);
1045
1046 // Second major entry point. From the TypeFunc signature, generate code
1047 // to pass arguments from the Java calling convention to the C calling
1048 // convention.
1049 Compile(ciEnv* ci_env, const TypeFunc *(*gen)(),
1050 address stub_function, const char *stub_name,
1051 int is_fancy_jump, bool pass_tls,
1052 bool return_pc, DirectiveSet* directive);
1053
1054 // Are we compiling a method?
1055 bool has_method() { return method() != NULL; }
1056
1057 // Maybe print some information about this compile.
1058 void print_compile_messages();
1059
1060 // Final graph reshaping, a post-pass after the regular optimizer is done.
1061 bool final_graph_reshaping();
1062
1063 // returns true if adr is completely contained in the given alias category
1064 bool must_alias(const TypePtr* adr, int alias_idx);
1065
1066 // returns true if adr overlaps with the given alias category
1067 bool can_alias(const TypePtr* adr, int alias_idx);
1068
1069 // Stack slots that may be unused by the calling convention but must
1070 // otherwise be preserved. On Intel this includes the return address.
1071 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
1072 uint in_preserve_stack_slots() {
1073 return SharedRuntime::in_preserve_stack_slots();
1074 }
1075
1076 // "Top of Stack" slots that may be unused by the calling convention but must
1077 // otherwise be preserved.
1078 // On Intel these are not necessary and the value can be zero.
1079 static uint out_preserve_stack_slots() {
1080 return SharedRuntime::out_preserve_stack_slots();
1081 }
1082
1083 // Number of outgoing stack slots killed above the out_preserve_stack_slots
1084 // for calls to C. Supports the var-args backing area for register parms.
1085 uint varargs_C_out_slots_killed() const;
1086
1087 // Number of Stack Slots consumed by a synchronization entry
1088 int sync_stack_slots() const;
1089
1090 // Compute the name of old_SP. See <arch>.ad for frame layout.
1091 OptoReg::Name compute_old_SP();
1092
1093 private:
1094 // Phase control:
1095 void Init(int aliaslevel); // Prepare for a single compilation
1096 int Inline_Warm(); // Find more inlining work.
1097 void Finish_Warm(); // Give up on further inlines.
1098 void Optimize(); // Given a graph, optimize it
1099 void Code_Gen(); // Generate code from a graph
1100
1101 // Management of the AliasType table.
1102 void grow_alias_types();
1103 AliasCacheEntry* probe_alias_cache(const TypePtr* adr_type);
1104 const TypePtr *flatten_alias_type(const TypePtr* adr_type) const;
1105 AliasType* find_alias_type(const TypePtr* adr_type, bool no_create, ciField* field);
1106
1107 void verify_top(Node*) const PRODUCT_RETURN;
1108
1109 // Intrinsic setup.
1110 CallGenerator* make_vm_intrinsic(ciMethod* m, bool is_virtual); // constructor
1111 int intrinsic_insertion_index(ciMethod* m, bool is_virtual, bool& found); // helper
1112 CallGenerator* find_intrinsic(ciMethod* m, bool is_virtual); // query fn
1113 void register_intrinsic(CallGenerator* cg); // update fn
1114
1115 #ifndef PRODUCT
1116 static juint _intrinsic_hist_count[];
1117 static jubyte _intrinsic_hist_flags[];
1118 #endif
1119 // Function calls made by the public function final_graph_reshaping.
1120 // No need to be made public as they are not called elsewhere.
1121 void final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc);
1122 void final_graph_reshaping_main_switch(Node* n, Final_Reshape_Counts& frc, uint nop);
1123 void final_graph_reshaping_walk( Node_Stack &nstack, Node *root, Final_Reshape_Counts &frc );
1124 void eliminate_redundant_card_marks(Node* n);
1125
1126 // Logic cone optimization.
1127 void optimize_logic_cones(PhaseIterGVN &igvn);
1128 void collect_logic_cone_roots(Unique_Node_List& list);
1129 void process_logic_cone_root(PhaseIterGVN &igvn, Node* n, VectorSet& visited);
1130 bool compute_logic_cone(Node* n, Unique_Node_List& partition, Unique_Node_List& inputs);
1131 uint compute_truth_table(Unique_Node_List& partition, Unique_Node_List& inputs);
1132 uint eval_macro_logic_op(uint func, uint op1, uint op2, uint op3);
1133 Node* xform_to_MacroLogicV(PhaseIterGVN &igvn, const TypeVect* vt, Unique_Node_List& partitions, Unique_Node_List& inputs);
1134 void check_no_dead_use() const NOT_DEBUG_RETURN;
1135
1136 public:
1137
1138 // Note: Histogram array size is about 1 Kb.
1139 enum { // flag bits:
1140 _intrinsic_worked = 1, // succeeded at least once
1141 _intrinsic_failed = 2, // tried it but it failed
1142 _intrinsic_disabled = 4, // was requested but disabled (e.g., -XX:-InlineUnsafeOps)
1143 _intrinsic_virtual = 8, // was seen in the virtual form (rare)
1144 _intrinsic_both = 16 // was seen in the non-virtual form (usual)
1145 };
1146 // Update histogram. Return boolean if this is a first-time occurrence.
1147 static bool gather_intrinsic_statistics(vmIntrinsics::ID id,
1148 bool is_virtual, int flags) PRODUCT_RETURN0;
1149 static void print_intrinsic_statistics() PRODUCT_RETURN;
1150
1151 // Graph verification code
1152 // Walk the node list, verifying that there is a one-to-one
1153 // correspondence between Use-Def edges and Def-Use edges
1154 // The option no_dead_code enables stronger checks that the
1155 // graph is strongly connected from root in both directions.
1156 void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN;
1157
1158 // End-of-run dumps.
1159 static void print_statistics() PRODUCT_RETURN;
1160
1161 // Verify ADLC assumptions during startup
1162 static void adlc_verification() PRODUCT_RETURN;
1163
1164 // Definitions of pd methods
1165 static void pd_compiler2_init();
1166
1167 // Static parse-time type checking logic for gen_subtype_check:
1168 enum { SSC_always_false, SSC_always_true, SSC_easy_test, SSC_full_test };
1169 int static_subtype_check(ciKlass* superk, ciKlass* subk);
1170
1171 static Node* conv_I2X_index(PhaseGVN* phase, Node* offset, const TypeInt* sizetype,
1172 // Optional control dependency (for example, on range check)
1173 Node* ctrl = NULL);
1174
1175 // Convert integer value to a narrowed long type dependent on ctrl (for example, a range check)
1176 static Node* constrained_convI2L(PhaseGVN* phase, Node* value, const TypeInt* itype, Node* ctrl, bool carry_dependency = false);
1177
1178 // Auxiliary methods for randomized fuzzing/stressing
1179 int random();
1180 bool randomized_select(int count);
1181
1182 // supporting clone_map
1183 CloneMap& clone_map();
1184 void set_clone_map(Dict* d);
1185
1186 bool needs_clinit_barrier(ciField* ik, ciMethod* accessing_method);
1187 bool needs_clinit_barrier(ciMethod* ik, ciMethod* accessing_method);
1188 bool needs_clinit_barrier(ciInstanceKlass* ik, ciMethod* accessing_method);
1189
1190 #ifdef IA32
1191 private:
1192 bool _select_24_bit_instr; // We selected an instruction with a 24-bit result
1193 bool _in_24_bit_fp_mode; // We are emitting instructions with 24-bit results
1194
1195 // Remember if this compilation changes hardware mode to 24-bit precision.
1196 void set_24_bit_selection_and_mode(bool selection, bool mode) {
1197 _select_24_bit_instr = selection;
1198 _in_24_bit_fp_mode = mode;
1199 }
1200
1201 public:
1202 bool select_24_bit_instr() const { return _select_24_bit_instr; }
1203 bool in_24_bit_fp_mode() const { return _in_24_bit_fp_mode; }
1204 #endif // IA32
1205 #ifdef ASSERT
1206 bool _type_verify_symmetry;
1207 void set_exception_backedge() { _exception_backedge = true; }
1208 bool has_exception_backedge() const { return _exception_backedge; }
1209 #endif
1210
1211 static bool push_thru_add(PhaseGVN* phase, Node* z, const TypeInteger* tz, const TypeInteger*& rx, const TypeInteger*& ry,
1212 BasicType bt);
1213
1214 static Node* narrow_value(BasicType bt, Node* value, const Type* type, PhaseGVN* phase, bool transform_res);
1215 };
1216
1217 #endif // SHARE_OPTO_COMPILE_HPP