1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_OPTO_COMPILE_HPP
26 #define SHARE_VM_OPTO_COMPILE_HPP
27
28 #include "asm/codeBuffer.hpp"
29 #include "ci/compilerInterface.hpp"
30 #include "code/debugInfoRec.hpp"
31 #include "code/exceptionHandlerTable.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "libadt/dict.hpp"
35 #include "libadt/vectset.hpp"
36 #include "memory/resourceArea.hpp"
37 #include "opto/idealGraphPrinter.hpp"
38 #include "opto/phasetype.hpp"
39 #include "opto/phase.hpp"
40 #include "opto/regmask.hpp"
41 #include "runtime/deoptimization.hpp"
42 #include "runtime/vmThread.hpp"
43 #include "trace/tracing.hpp"
44 #include "utilities/ticks.hpp"
45
46 class Block;
47 class Bundle;
48 class C2Compiler;
49 class CallGenerator;
50 class ConnectionGraph;
51 class InlineTree;
52 class Int_Array;
53 class Matcher;
54 class MachConstantNode;
55 class MachConstantBaseNode;
56 class MachNode;
57 class MachOper;
58 class MachSafePointNode;
59 class Node;
60 class Node_Array;
61 class Node_Notes;
62 class OptoReg;
63 class PhaseCFG;
64 class PhaseGVN;
65 class PhaseIterGVN;
66 class PhaseRegAlloc;
67 class PhaseCCP;
68 class PhaseCCP_DCE;
69 class RootNode;
70 class relocInfo;
71 class Scope;
72 class StartNode;
73 class SafePointNode;
74 class JVMState;
75 class Type;
76 class TypeData;
77 class TypePtr;
78 class TypeOopPtr;
79 class TypeFunc;
80 class Unique_Node_List;
81 class nmethod;
82 class WarmCallInfo;
83 class Node_Stack;
84 struct Final_Reshape_Counts;
85
86 //------------------------------Compile----------------------------------------
87 // This class defines a top-level Compiler invocation.
88
89 class Compile : public Phase {
90 friend class VMStructs;
91
92 public:
93 // Fixed alias indexes. (See also MergeMemNode.)
94 enum {
95 AliasIdxTop = 1, // pseudo-index, aliases to nothing (used as sentinel value)
96 AliasIdxBot = 2, // pseudo-index, aliases to everything
97 AliasIdxRaw = 3 // hard-wired index for TypeRawPtr::BOTTOM
98 };
99
100 // Variant of TraceTime(NULL, &_t_accumulator, CITime);
101 // Integrated with logging. If logging is turned on, and CITimeVerbose is true,
102 // then brackets are put into the log, with time stamps and node counts.
103 // (The time collection itself is always conditionalized on CITime.)
104 class TracePhase : public TraceTime {
105 private:
106 Compile* C;
107 CompileLog* _log;
108 const char* _phase_name;
109 bool _dolog;
110 public:
111 TracePhase(const char* name, elapsedTimer* accumulator);
112 ~TracePhase();
113 };
114
115 // Information per category of alias (memory slice)
116 class AliasType {
117 private:
118 friend class Compile;
119
120 int _index; // unique index, used with MergeMemNode
121 const TypePtr* _adr_type; // normalized address type
122 ciField* _field; // relevant instance field, or null if none
123 const Type* _element; // relevant array element type, or null if none
124 bool _is_rewritable; // false if the memory is write-once only
125 int _general_index; // if this is type is an instance, the general
126 // type that this is an instance of
127
128 void Init(int i, const TypePtr* at);
129
130 public:
131 int index() const { return _index; }
132 const TypePtr* adr_type() const { return _adr_type; }
133 ciField* field() const { return _field; }
134 const Type* element() const { return _element; }
135 bool is_rewritable() const { return _is_rewritable; }
136 bool is_volatile() const { return (_field ? _field->is_volatile() : false); }
137 int general_index() const { return (_general_index != 0) ? _general_index : _index; }
138
139 void set_rewritable(bool z) { _is_rewritable = z; }
140 void set_field(ciField* f) {
141 assert(!_field,"");
142 _field = f;
143 if (f->is_final() || f->is_stable()) {
144 // In the case of @Stable, multiple writes are possible but may be assumed to be no-ops.
145 _is_rewritable = false;
146 }
147 }
148 void set_element(const Type* e) {
149 assert(_element == NULL, "");
150 _element = e;
151 }
152
153 void print_on(outputStream* st) PRODUCT_RETURN;
154 };
155
156 enum {
157 logAliasCacheSize = 6,
158 AliasCacheSize = (1<<logAliasCacheSize)
159 };
160 struct AliasCacheEntry { const TypePtr* _adr_type; int _index; }; // simple duple type
161 enum {
162 trapHistLength = MethodData::_trap_hist_limit
163 };
164
165 // Constant entry of the constant table.
166 class Constant {
167 private:
168 BasicType _type;
169 union {
170 jvalue _value;
171 Metadata* _metadata;
172 } _v;
173 int _offset; // offset of this constant (in bytes) relative to the constant table base.
174 float _freq;
175 bool _can_be_reused; // true (default) if the value can be shared with other users.
176
177 public:
178 Constant() : _type(T_ILLEGAL), _offset(-1), _freq(0.0f), _can_be_reused(true) { _v._value.l = 0; }
179 Constant(BasicType type, jvalue value, float freq = 0.0f, bool can_be_reused = true) :
180 _type(type),
181 _offset(-1),
182 _freq(freq),
183 _can_be_reused(can_be_reused)
184 {
185 assert(type != T_METADATA, "wrong constructor");
186 _v._value = value;
187 }
188 Constant(Metadata* metadata, bool can_be_reused = true) :
189 _type(T_METADATA),
190 _offset(-1),
191 _freq(0.0f),
192 _can_be_reused(can_be_reused)
193 {
194 _v._metadata = metadata;
195 }
196
197 bool operator==(const Constant& other);
198
199 BasicType type() const { return _type; }
200
201 jlong get_jlong() const { return _v._value.j; }
202 jfloat get_jfloat() const { return _v._value.f; }
203 jdouble get_jdouble() const { return _v._value.d; }
204 jobject get_jobject() const { return _v._value.l; }
205
206 Metadata* get_metadata() const { return _v._metadata; }
207
208 int offset() const { return _offset; }
209 void set_offset(int offset) { _offset = offset; }
210
211 float freq() const { return _freq; }
212 void inc_freq(float freq) { _freq += freq; }
213
214 bool can_be_reused() const { return _can_be_reused; }
215 };
216
217 // Constant table.
218 class ConstantTable {
219 private:
220 GrowableArray<Constant> _constants; // Constants of this table.
221 int _size; // Size in bytes the emitted constant table takes (including padding).
222 int _table_base_offset; // Offset of the table base that gets added to the constant offsets.
223 int _nof_jump_tables; // Number of jump-tables in this constant table.
224
225 static int qsort_comparator(Constant* a, Constant* b);
226
227 // We use negative frequencies to keep the order of the
228 // jump-tables in which they were added. Otherwise we get into
229 // trouble with relocation.
230 float next_jump_table_freq() { return -1.0f * (++_nof_jump_tables); }
231
232 public:
233 ConstantTable() :
234 _size(-1),
235 _table_base_offset(-1), // We can use -1 here since the constant table is always bigger than 2 bytes (-(size / 2), see MachConstantBaseNode::emit).
236 _nof_jump_tables(0)
237 {}
238
239 int size() const { assert(_size != -1, "not calculated yet"); return _size; }
240
241 int calculate_table_base_offset() const; // AD specific
242 void set_table_base_offset(int x) { assert(_table_base_offset == -1 || x == _table_base_offset, "can't change"); _table_base_offset = x; }
243 int table_base_offset() const { assert(_table_base_offset != -1, "not set yet"); return _table_base_offset; }
244
245 void emit(CodeBuffer& cb);
246
247 // Returns the offset of the last entry (the top) of the constant table.
248 int top_offset() const { assert(_constants.top().offset() != -1, "not bound yet"); return _constants.top().offset(); }
249
250 void calculate_offsets_and_size();
251 int find_offset(Constant& con) const;
252
253 void add(Constant& con);
254 Constant add(MachConstantNode* n, BasicType type, jvalue value);
255 Constant add(Metadata* metadata);
256 Constant add(MachConstantNode* n, MachOper* oper);
257 Constant add(MachConstantNode* n, jfloat f) {
258 jvalue value; value.f = f;
259 return add(n, T_FLOAT, value);
260 }
261 Constant add(MachConstantNode* n, jdouble d) {
262 jvalue value; value.d = d;
263 return add(n, T_DOUBLE, value);
264 }
265
266 // Jump-table
267 Constant add_jump_table(MachConstantNode* n);
268 void fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray<Label*> labels) const;
269 };
270
271 private:
272 // Fixed parameters to this compilation.
273 const int _compile_id;
274 const bool _save_argument_registers; // save/restore arg regs for trampolines
275 const bool _subsume_loads; // Load can be matched as part of a larger op.
276 const bool _do_escape_analysis; // Do escape analysis.
277 const bool _eliminate_boxing; // Do boxing elimination.
278 ciMethod* _method; // The method being compiled.
279 int _entry_bci; // entry bci for osr methods.
280 const TypeFunc* _tf; // My kind of signature
281 InlineTree* _ilt; // Ditto (temporary).
282 address _stub_function; // VM entry for stub being compiled, or NULL
283 const char* _stub_name; // Name of stub or adapter being compiled, or NULL
284 address _stub_entry_point; // Compile code entry for generated stub, or NULL
285
286 // Control of this compilation.
287 int _num_loop_opts; // Number of iterations for doing loop optimiztions
288 int _max_inline_size; // Max inline size for this compilation
289 int _freq_inline_size; // Max hot method inline size for this compilation
290 int _fixed_slots; // count of frame slots not allocated by the register
291 // allocator i.e. locks, original deopt pc, etc.
292 // For deopt
293 int _orig_pc_slot;
294 int _orig_pc_slot_offset_in_bytes;
295
296 int _major_progress; // Count of something big happening
297 bool _inlining_progress; // progress doing incremental inlining?
298 bool _inlining_incrementally;// Are we doing incremental inlining (post parse)
299 bool _has_loops; // True if the method _may_ have some loops
300 bool _has_split_ifs; // True if the method _may_ have some split-if
301 bool _has_unsafe_access; // True if the method _may_ produce faults in unsafe loads or stores.
302 bool _has_stringbuilder; // True StringBuffers or StringBuilders are allocated
303 bool _has_boxed_value; // True if a boxed object is allocated
304 int _max_vector_size; // Maximum size of generated vectors
305 uint _trap_hist[trapHistLength]; // Cumulative traps
306 bool _trap_can_recompile; // Have we emitted a recompiling trap?
307 uint _decompile_count; // Cumulative decompilation counts.
308 bool _do_inlining; // True if we intend to do inlining
309 bool _do_scheduling; // True if we intend to do scheduling
310 bool _do_freq_based_layout; // True if we intend to do frequency based block layout
311 bool _do_count_invocations; // True if we generate code to count invocations
312 bool _do_method_data_update; // True if we generate code to update MethodData*s
313 bool _age_code; // True if we need to profile code age (decrement the aging counter)
314 int _AliasLevel; // Locally-adjusted version of AliasLevel flag.
315 bool _print_assembly; // True if we should dump assembly code for this compilation
316 bool _print_inlining; // True if we should print inlining for this compilation
317 bool _print_intrinsics; // True if we should print intrinsics for this compilation
318 #ifndef PRODUCT
319 bool _trace_opto_output;
320 bool _parsed_irreducible_loop; // True if ciTypeFlow detected irreducible loops during parsing
321 #endif
322 bool _has_irreducible_loop; // Found irreducible loops
323 // JSR 292
324 bool _has_method_handle_invokes; // True if this method has MethodHandle invokes.
325 RTMState _rtm_state; // State of Restricted Transactional Memory usage
326
327 // Compilation environment.
328 Arena _comp_arena; // Arena with lifetime equivalent to Compile
329 ciEnv* _env; // CI interface
330 CompileLog* _log; // from CompilerThread
331 const char* _failure_reason; // for record_failure/failing pattern
332 GrowableArray<CallGenerator*>* _intrinsics; // List of intrinsics.
333 GrowableArray<Node*>* _macro_nodes; // List of nodes which need to be expanded before matching.
334 GrowableArray<Node*>* _predicate_opaqs; // List of Opaque1 nodes for the loop predicates.
335 GrowableArray<Node*>* _expensive_nodes; // List of nodes that are expensive to compute and that we'd better not let the GVN freely common
336 ConnectionGraph* _congraph;
337 #ifndef PRODUCT
338 IdealGraphPrinter* _printer;
339 #endif
340
341
342 // Node management
343 uint _unique; // Counter for unique Node indices
344 VectorSet _dead_node_list; // Set of dead nodes
345 uint _dead_node_count; // Number of dead nodes; VectorSet::Size() is O(N).
346 // So use this to keep count and make the call O(1).
347 DEBUG_ONLY( Unique_Node_List* _modified_nodes; ) // List of nodes which inputs were modified
348
349 debug_only(static int _debug_idx;) // Monotonic counter (not reset), use -XX:BreakAtNode=<idx>
350 Arena _node_arena; // Arena for new-space Nodes
351 Arena _old_arena; // Arena for old-space Nodes, lifetime during xform
352 RootNode* _root; // Unique root of compilation, or NULL after bail-out.
353 Node* _top; // Unique top node. (Reset by various phases.)
354
355 Node* _immutable_memory; // Initial memory state
356
357 Node* _recent_alloc_obj;
358 Node* _recent_alloc_ctl;
359
360 // Constant table
361 ConstantTable _constant_table; // The constant table for this compile.
362 MachConstantBaseNode* _mach_constant_base_node; // Constant table base node singleton.
363
364
365 // Blocked array of debugging and profiling information,
366 // tracked per node.
367 enum { _log2_node_notes_block_size = 8,
368 _node_notes_block_size = (1<<_log2_node_notes_block_size)
369 };
370 GrowableArray<Node_Notes*>* _node_note_array;
371 Node_Notes* _default_node_notes; // default notes for new nodes
372
373 // After parsing and every bulk phase we hang onto the Root instruction.
374 // The RootNode instruction is where the whole program begins. It produces
375 // the initial Control and BOTTOM for everybody else.
376
377 // Type management
378 Arena _Compile_types; // Arena for all types
379 Arena* _type_arena; // Alias for _Compile_types except in Initialize_shared()
380 Dict* _type_dict; // Intern table
381 void* _type_hwm; // Last allocation (see Type::operator new/delete)
382 size_t _type_last_size; // Last allocation size (see Type::operator new/delete)
383 ciMethod* _last_tf_m; // Cache for
384 const TypeFunc* _last_tf; // TypeFunc::make
385 AliasType** _alias_types; // List of alias types seen so far.
386 int _num_alias_types; // Logical length of _alias_types
387 int _max_alias_types; // Physical length of _alias_types
388 AliasCacheEntry _alias_cache[AliasCacheSize]; // Gets aliases w/o data structure walking
389
390 // Parsing, optimization
391 PhaseGVN* _initial_gvn; // Results of parse-time PhaseGVN
392 Unique_Node_List* _for_igvn; // Initial work-list for next round of Iterative GVN
393 WarmCallInfo* _warm_calls; // Sorted work-list for heat-based inlining.
394
395 GrowableArray<CallGenerator*> _late_inlines; // List of CallGenerators to be revisited after
396 // main parsing has finished.
397 GrowableArray<CallGenerator*> _string_late_inlines; // same but for string operations
398
399 GrowableArray<CallGenerator*> _boxing_late_inlines; // same but for boxing operations
400
401 int _late_inlines_pos; // Where in the queue should the next late inlining candidate go (emulate depth first inlining)
402 uint _number_of_mh_late_inlines; // number of method handle late inlining still pending
403
404
405 // Inlining may not happen in parse order which would make
406 // PrintInlining output confusing. Keep track of PrintInlining
407 // pieces in order.
408 class PrintInliningBuffer : public ResourceObj {
409 private:
410 CallGenerator* _cg;
411 stringStream* _ss;
412
413 public:
414 PrintInliningBuffer()
415 : _cg(NULL) { _ss = new stringStream(); }
416
417 stringStream* ss() const { return _ss; }
418 CallGenerator* cg() const { return _cg; }
419 void set_cg(CallGenerator* cg) { _cg = cg; }
420 };
421
422 stringStream* _print_inlining_stream;
423 GrowableArray<PrintInliningBuffer>* _print_inlining_list;
424 int _print_inlining_idx;
425 char* _print_inlining_output;
426
427 // Only keep nodes in the expensive node list that need to be optimized
428 void cleanup_expensive_nodes(PhaseIterGVN &igvn);
429 // Use for sorting expensive nodes to bring similar nodes together
430 static int cmp_expensive_nodes(Node** n1, Node** n2);
431 // Expensive nodes list already sorted?
432 bool expensive_nodes_sorted() const;
433 // Remove the speculative part of types and clean up the graph
434 void remove_speculative_types(PhaseIterGVN &igvn);
435
436 void* _replay_inline_data; // Pointer to data loaded from file
437
438 void print_inlining_init();
439 void print_inlining_reinit();
440 void print_inlining_commit();
441 void print_inlining_push();
442 PrintInliningBuffer& print_inlining_current();
443
444 void log_late_inline_failure(CallGenerator* cg, const char* msg);
445
446 public:
447
448 outputStream* print_inlining_stream() const {
449 assert(print_inlining() || print_intrinsics(), "PrintInlining off?");
450 return _print_inlining_stream;
451 }
452
453 void print_inlining_update(CallGenerator* cg);
454 void print_inlining_update_delayed(CallGenerator* cg);
455 void print_inlining_move_to(CallGenerator* cg);
456 void print_inlining_assert_ready();
457 void print_inlining_reset();
458
459 void print_inlining(ciMethod* method, int inline_level, int bci, const char* msg = NULL) {
460 stringStream ss;
461 CompileTask::print_inlining(&ss, method, inline_level, bci, msg);
462 print_inlining_stream()->print("%s", ss.as_string());
463 }
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 bool _select_24_bit_instr; // We selected an instruction with a 24-bit result
478 bool _in_24_bit_fp_mode; // We are emitting instructions with 24-bit results
479 int _java_calls; // Number of java calls in the method
480 int _inner_loops; // Number of inner loops in the method
481 Matcher* _matcher; // Engine to map ideal to machine instructions
482 PhaseRegAlloc* _regalloc; // Results of register allocation.
483 int _frame_slots; // Size of total frame in stack slots
484 CodeOffsets _code_offsets; // Offsets into the code for various interesting entries
485 RegMask _FIRST_STACK_mask; // All stack slots usable for spills (depends on frame layout)
486 int _interpreter_frame_size;
487
488 uint _node_bundling_limit;
489 Bundle* _node_bundling_base; // Information for instruction bundling
490
491 // Instruction bits passed off to the VM
492 int _method_size; // Size of nmethod code segment in bytes
493 CodeBuffer _code_buffer; // Where the code is assembled
494 int _first_block_size; // Size of unvalidated entry point code / OSR poison code
495 ExceptionHandlerTable _handler_table; // Table of native-code exception handlers
496 ImplicitExceptionTable _inc_table; // Table of implicit null checks in native code
497 OopMapSet* _oop_map_set; // Table of oop maps (one for each safepoint location)
498 static int _CompiledZap_count; // counter compared against CompileZap[First/Last]
499 BufferBlob* _scratch_buffer_blob; // For temporary code buffers.
500 relocInfo* _scratch_locs_memory; // For temporary code buffers.
501 int _scratch_const_size; // For temporary code buffers.
502 bool _in_scratch_emit_size; // true when in scratch_emit_size.
503
504 public:
505 // Accessors
506
507 // The Compile instance currently active in this (compiler) thread.
508 static Compile* current() {
509 return (Compile*) ciEnv::current()->compiler_data();
510 }
511
512 // ID for this compilation. Useful for setting breakpoints in the debugger.
513 int compile_id() const { return _compile_id; }
514
515 // Does this compilation allow instructions to subsume loads? User
516 // instructions that subsume a load may result in an unschedulable
517 // instruction sequence.
518 bool subsume_loads() const { return _subsume_loads; }
519 /** Do escape analysis. */
520 bool do_escape_analysis() const { return _do_escape_analysis; }
521 /** Do boxing elimination. */
522 bool eliminate_boxing() const { return _eliminate_boxing; }
523 /** Do aggressive boxing elimination. */
524 bool aggressive_unboxing() const { return _eliminate_boxing && AggressiveUnboxing; }
525 bool save_argument_registers() const { return _save_argument_registers; }
526
527
528 // Other fixed compilation parameters.
529 ciMethod* method() const { return _method; }
530 int entry_bci() const { return _entry_bci; }
531 bool is_osr_compilation() const { return _entry_bci != InvocationEntryBci; }
532 bool is_method_compilation() const { return (_method != NULL && !_method->flags().is_native()); }
533 const TypeFunc* tf() const { assert(_tf!=NULL, ""); return _tf; }
534 void init_tf(const TypeFunc* tf) { assert(_tf==NULL, ""); _tf = tf; }
535 InlineTree* ilt() const { return _ilt; }
536 address stub_function() const { return _stub_function; }
537 const char* stub_name() const { return _stub_name; }
538 address stub_entry_point() const { return _stub_entry_point; }
539
540 // Control of this compilation.
541 int fixed_slots() const { assert(_fixed_slots >= 0, ""); return _fixed_slots; }
542 void set_fixed_slots(int n) { _fixed_slots = n; }
543 int major_progress() const { return _major_progress; }
544 void set_inlining_progress(bool z) { _inlining_progress = z; }
545 int inlining_progress() const { return _inlining_progress; }
546 void set_inlining_incrementally(bool z) { _inlining_incrementally = z; }
547 int inlining_incrementally() const { return _inlining_incrementally; }
548 void set_major_progress() { _major_progress++; }
549 void clear_major_progress() { _major_progress = 0; }
550 int num_loop_opts() const { return _num_loop_opts; }
551 void set_num_loop_opts(int n) { _num_loop_opts = n; }
552 int max_inline_size() const { return _max_inline_size; }
553 void set_freq_inline_size(int n) { _freq_inline_size = n; }
554 int freq_inline_size() const { return _freq_inline_size; }
555 void set_max_inline_size(int n) { _max_inline_size = n; }
556 bool has_loops() const { return _has_loops; }
557 void set_has_loops(bool z) { _has_loops = z; }
558 bool has_split_ifs() const { return _has_split_ifs; }
559 void set_has_split_ifs(bool z) { _has_split_ifs = z; }
560 bool has_unsafe_access() const { return _has_unsafe_access; }
561 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; }
562 bool has_stringbuilder() const { return _has_stringbuilder; }
563 void set_has_stringbuilder(bool z) { _has_stringbuilder = z; }
564 bool has_boxed_value() const { return _has_boxed_value; }
565 void set_has_boxed_value(bool z) { _has_boxed_value = z; }
566 int max_vector_size() const { return _max_vector_size; }
567 void set_max_vector_size(int s) { _max_vector_size = s; }
568 void set_trap_count(uint r, uint c) { assert(r < trapHistLength, "oob"); _trap_hist[r] = c; }
569 uint trap_count(uint r) const { assert(r < trapHistLength, "oob"); return _trap_hist[r]; }
570 bool trap_can_recompile() const { return _trap_can_recompile; }
571 void set_trap_can_recompile(bool z) { _trap_can_recompile = z; }
572 uint decompile_count() const { return _decompile_count; }
573 void set_decompile_count(uint c) { _decompile_count = c; }
574 bool allow_range_check_smearing() const;
575 bool do_inlining() const { return _do_inlining; }
576 void set_do_inlining(bool z) { _do_inlining = z; }
577 bool do_scheduling() const { return _do_scheduling; }
578 void set_do_scheduling(bool z) { _do_scheduling = z; }
579 bool do_freq_based_layout() const{ return _do_freq_based_layout; }
580 void set_do_freq_based_layout(bool z){ _do_freq_based_layout = z; }
581 bool do_count_invocations() const{ return _do_count_invocations; }
582 void set_do_count_invocations(bool z){ _do_count_invocations = z; }
583 bool do_method_data_update() const { return _do_method_data_update; }
584 void set_do_method_data_update(bool z) { _do_method_data_update = z; }
585 bool age_code() const { return _age_code; }
586 void set_age_code(bool z) { _age_code = z; }
587 int AliasLevel() const { return _AliasLevel; }
588 bool print_assembly() const { return _print_assembly; }
589 void set_print_assembly(bool z) { _print_assembly = z; }
590 bool print_inlining() const { return _print_inlining; }
591 void set_print_inlining(bool z) { _print_inlining = z; }
592 bool print_intrinsics() const { return _print_intrinsics; }
593 void set_print_intrinsics(bool z) { _print_intrinsics = z; }
594 RTMState rtm_state() const { return _rtm_state; }
595 void set_rtm_state(RTMState s) { _rtm_state = s; }
596 bool use_rtm() const { return (_rtm_state & NoRTM) == 0; }
597 bool profile_rtm() const { return _rtm_state == ProfileRTM; }
598 // check the CompilerOracle for special behaviours for this compile
599 bool method_has_option(const char * option) {
600 return method() != NULL && method()->has_option(option);
601 }
602 template<typename T>
603 bool method_has_option_value(const char * option, T& value) {
604 return method() != NULL && method()->has_option_value(option, value);
605 }
606 #ifndef PRODUCT
607 bool trace_opto_output() const { return _trace_opto_output; }
608 bool parsed_irreducible_loop() const { return _parsed_irreducible_loop; }
609 void set_parsed_irreducible_loop(bool z) { _parsed_irreducible_loop = z; }
610 int _in_dump_cnt; // Required for dumping ir nodes.
611 #endif
612 bool has_irreducible_loop() const { return _has_irreducible_loop; }
613 void set_has_irreducible_loop(bool z) { _has_irreducible_loop = z; }
614
615 // JSR 292
616 bool has_method_handle_invokes() const { return _has_method_handle_invokes; }
617 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; }
618
619 Ticks _latest_stage_start_counter;
620
621 void begin_method() {
622 #ifndef PRODUCT
623 if (_printer && _printer->should_print(_method)) {
624 _printer->begin_method(this);
625 }
626 #endif
627 C->_latest_stage_start_counter.stamp();
628 }
629
630 void print_method(CompilerPhaseType cpt, int level = 1) {
631 EventCompilerPhase event;
632 if (event.should_commit()) {
633 event.set_starttime(C->_latest_stage_start_counter);
634 event.set_phase((u1) cpt);
635 event.set_compileID(C->_compile_id);
636 event.set_phaseLevel(level);
637 event.commit();
638 }
639
640
641 #ifndef PRODUCT
642 if (_printer && _printer->should_print(_method)) {
643 _printer->print_method(this, CompilerPhaseTypeHelper::to_string(cpt), level);
644 }
645 #endif
646 C->_latest_stage_start_counter.stamp();
647 }
648
649 void end_method(int level = 1) {
650 EventCompilerPhase event;
651 if (event.should_commit()) {
652 event.set_starttime(C->_latest_stage_start_counter);
653 event.set_phase((u1) PHASE_END);
654 event.set_compileID(C->_compile_id);
655 event.set_phaseLevel(level);
656 event.commit();
657 }
658 #ifndef PRODUCT
659 if (_printer && _printer->should_print(_method)) {
660 _printer->end_method();
661 }
662 #endif
663 }
664
665 int macro_count() const { return _macro_nodes->length(); }
666 int predicate_count() const { return _predicate_opaqs->length();}
667 int expensive_count() const { return _expensive_nodes->length(); }
668 Node* macro_node(int idx) const { return _macro_nodes->at(idx); }
669 Node* predicate_opaque1_node(int idx) const { return _predicate_opaqs->at(idx);}
670 Node* expensive_node(int idx) const { return _expensive_nodes->at(idx); }
671 ConnectionGraph* congraph() { return _congraph;}
672 void set_congraph(ConnectionGraph* congraph) { _congraph = congraph;}
673 void add_macro_node(Node * n) {
674 //assert(n->is_macro(), "must be a macro node");
675 assert(!_macro_nodes->contains(n), " duplicate entry in expand list");
676 _macro_nodes->append(n);
677 }
678 void remove_macro_node(Node * n) {
679 // this function may be called twice for a node so check
680 // that the node is in the array before attempting to remove it
681 if (_macro_nodes->contains(n))
682 _macro_nodes->remove(n);
683 // remove from _predicate_opaqs list also if it is there
684 if (predicate_count() > 0 && _predicate_opaqs->contains(n)){
685 _predicate_opaqs->remove(n);
686 }
687 }
688 void add_expensive_node(Node * n);
689 void remove_expensive_node(Node * n) {
690 if (_expensive_nodes->contains(n)) {
691 _expensive_nodes->remove(n);
692 }
693 }
694 void add_predicate_opaq(Node * n) {
695 assert(!_predicate_opaqs->contains(n), " duplicate entry in predicate opaque1");
696 assert(_macro_nodes->contains(n), "should have already been in macro list");
697 _predicate_opaqs->append(n);
698 }
699 // remove the opaque nodes that protect the predicates so that the unused checks and
700 // uncommon traps will be eliminated from the graph.
701 void cleanup_loop_predicates(PhaseIterGVN &igvn);
702 bool is_predicate_opaq(Node * n) {
703 return _predicate_opaqs->contains(n);
704 }
705
706 // Are there candidate expensive nodes for optimization?
707 bool should_optimize_expensive_nodes(PhaseIterGVN &igvn);
708 // Check whether n1 and n2 are similar
709 static int cmp_expensive_nodes(Node* n1, Node* n2);
710 // Sort expensive nodes to locate similar expensive nodes
711 void sort_expensive_nodes();
712
713 // Compilation environment.
714 Arena* comp_arena() { return &_comp_arena; }
715 ciEnv* env() const { return _env; }
716 CompileLog* log() const { return _log; }
717 bool failing() const { return _env->failing() || _failure_reason != NULL; }
718 const char* failure_reason() const { return (_env->failing()) ? _env->failure_reason() : _failure_reason; }
719
720 bool failure_reason_is(const char* r) const {
721 return (r == _failure_reason) || (r != NULL && _failure_reason != NULL && strcmp(r, _failure_reason) == 0);
722 }
723
724 void record_failure(const char* reason);
725 void record_method_not_compilable(const char* reason, bool all_tiers = false) {
726 // All bailouts cover "all_tiers" when TieredCompilation is off.
727 if (!TieredCompilation) all_tiers = true;
728 env()->record_method_not_compilable(reason, all_tiers);
729 // Record failure reason.
730 record_failure(reason);
731 }
732 void record_method_not_compilable_all_tiers(const char* reason) {
733 record_method_not_compilable(reason, true);
734 }
735 bool check_node_count(uint margin, const char* reason) {
736 if (live_nodes() + margin > (uint)MaxNodeLimit) {
737 record_method_not_compilable(reason);
738 return true;
739 } else {
740 return false;
741 }
742 }
743
744 // Node management
745 uint unique() const { return _unique; }
746 uint next_unique() { return _unique++; }
747 void set_unique(uint i) { _unique = i; }
748 static int debug_idx() { return debug_only(_debug_idx)+0; }
749 static void set_debug_idx(int i) { debug_only(_debug_idx = i); }
750 Arena* node_arena() { return &_node_arena; }
751 Arena* old_arena() { return &_old_arena; }
752 RootNode* root() const { return _root; }
753 void set_root(RootNode* r) { _root = r; }
754 StartNode* start() const; // (Derived from root.)
755 void init_start(StartNode* s);
756 Node* immutable_memory();
757
758 Node* recent_alloc_ctl() const { return _recent_alloc_ctl; }
759 Node* recent_alloc_obj() const { return _recent_alloc_obj; }
760 void set_recent_alloc(Node* ctl, Node* obj) {
761 _recent_alloc_ctl = ctl;
762 _recent_alloc_obj = obj;
763 }
764 void record_dead_node(uint idx) { if (_dead_node_list.test_set(idx)) return;
765 _dead_node_count++;
766 }
767 bool is_dead_node(uint idx) { return _dead_node_list.test(idx) != 0; }
768 uint dead_node_count() { return _dead_node_count; }
769 void reset_dead_node_list() { _dead_node_list.Reset();
770 _dead_node_count = 0;
771 }
772 uint live_nodes() const {
773 int val = _unique - _dead_node_count;
774 assert (val >= 0, err_msg_res("number of tracked dead nodes %d more than created nodes %d", _unique, _dead_node_count));
775 return (uint) val;
776 }
777 #ifdef ASSERT
778 uint count_live_nodes_by_graph_walk();
779 void print_missing_nodes();
780 #endif
781
782 // Record modified nodes to check that they are put on IGVN worklist
783 void record_modified_node(Node* n) NOT_DEBUG_RETURN;
784 void remove_modified_node(Node* n) NOT_DEBUG_RETURN;
785 DEBUG_ONLY( Unique_Node_List* modified_nodes() const { return _modified_nodes; } )
786
787 // Constant table
788 ConstantTable& constant_table() { return _constant_table; }
789
790 MachConstantBaseNode* mach_constant_base_node();
791 bool has_mach_constant_base_node() const { return _mach_constant_base_node != NULL; }
792 // Generated by adlc, true if CallNode requires MachConstantBase.
793 bool needs_clone_jvms();
794
795 // Handy undefined Node
796 Node* top() const { return _top; }
797
798 // these are used by guys who need to know about creation and transformation of top:
799 Node* cached_top_node() { return _top; }
800 void set_cached_top_node(Node* tn);
801
802 GrowableArray<Node_Notes*>* node_note_array() const { return _node_note_array; }
803 void set_node_note_array(GrowableArray<Node_Notes*>* arr) { _node_note_array = arr; }
804 Node_Notes* default_node_notes() const { return _default_node_notes; }
805 void set_default_node_notes(Node_Notes* n) { _default_node_notes = n; }
806
807 Node_Notes* node_notes_at(int idx) {
808 return locate_node_notes(_node_note_array, idx, false);
809 }
810 inline bool set_node_notes_at(int idx, Node_Notes* value);
811
812 // Copy notes from source to dest, if they exist.
813 // Overwrite dest only if source provides something.
814 // Return true if information was moved.
815 bool copy_node_notes_to(Node* dest, Node* source);
816
817 // Workhorse function to sort out the blocked Node_Notes array:
818 inline Node_Notes* locate_node_notes(GrowableArray<Node_Notes*>* arr,
819 int idx, bool can_grow = false);
820
821 void grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by);
822
823 // Type management
824 Arena* type_arena() { return _type_arena; }
825 Dict* type_dict() { return _type_dict; }
826 void* type_hwm() { return _type_hwm; }
827 size_t type_last_size() { return _type_last_size; }
828 int num_alias_types() { return _num_alias_types; }
829
830 void init_type_arena() { _type_arena = &_Compile_types; }
831 void set_type_arena(Arena* a) { _type_arena = a; }
832 void set_type_dict(Dict* d) { _type_dict = d; }
833 void set_type_hwm(void* p) { _type_hwm = p; }
834 void set_type_last_size(size_t sz) { _type_last_size = sz; }
835
836 const TypeFunc* last_tf(ciMethod* m) {
837 return (m == _last_tf_m) ? _last_tf : NULL;
838 }
839 void set_last_tf(ciMethod* m, const TypeFunc* tf) {
840 assert(m != NULL || tf == NULL, "");
841 _last_tf_m = m;
842 _last_tf = tf;
843 }
844
845 AliasType* alias_type(int idx) { assert(idx < num_alias_types(), "oob"); return _alias_types[idx]; }
846 AliasType* alias_type(const TypePtr* adr_type, ciField* field = NULL) { return find_alias_type(adr_type, false, field); }
847 bool have_alias_type(const TypePtr* adr_type);
848 AliasType* alias_type(ciField* field);
849
850 int get_alias_index(const TypePtr* at) { return alias_type(at)->index(); }
851 const TypePtr* get_adr_type(uint aidx) { return alias_type(aidx)->adr_type(); }
852 int get_general_index(uint aidx) { return alias_type(aidx)->general_index(); }
853
854 // Building nodes
855 void rethrow_exceptions(JVMState* jvms);
856 void return_values(JVMState* jvms);
857 JVMState* build_start_state(StartNode* start, const TypeFunc* tf);
858
859 // Decide how to build a call.
860 // The profile factor is a discount to apply to this site's interp. profile.
861 CallGenerator* call_generator(ciMethod* call_method, int vtable_index, bool call_does_dispatch,
862 JVMState* jvms, bool allow_inline, float profile_factor, ciKlass* speculative_receiver_type = NULL,
863 bool allow_intrinsics = true, bool delayed_forbidden = false);
864 bool should_delay_inlining(ciMethod* call_method, JVMState* jvms) {
865 return should_delay_string_inlining(call_method, jvms) ||
866 should_delay_boxing_inlining(call_method, jvms);
867 }
868 bool should_delay_string_inlining(ciMethod* call_method, JVMState* jvms);
869 bool should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms);
870
871 // Helper functions to identify inlining potential at call-site
872 ciMethod* optimize_virtual_call(ciMethod* caller, int bci, ciInstanceKlass* klass,
873 ciKlass* holder, ciMethod* callee,
874 const TypeOopPtr* receiver_type, bool is_virtual,
875 bool &call_does_dispatch, int &vtable_index);
876 ciMethod* optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass,
877 ciMethod* callee, const TypeOopPtr* receiver_type);
878
879 // Report if there were too many traps at a current method and bci.
880 // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded.
881 // If there is no MDO at all, report no trap unless told to assume it.
882 bool too_many_traps(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
883 // This version, unspecific to a particular bci, asks if
884 // PerMethodTrapLimit was exceeded for all inlined methods seen so far.
885 bool too_many_traps(Deoptimization::DeoptReason reason,
886 // Privately used parameter for logging:
887 ciMethodData* logmd = NULL);
888 // Report if there were too many recompiles at a method and bci.
889 bool too_many_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
890 // Return a bitset with the reasons where deoptimization is allowed,
891 // i.e., where there were not too many uncommon traps.
892 int _allowed_reasons;
893 int allowed_deopt_reasons() { return _allowed_reasons; }
894 void set_allowed_deopt_reasons();
895
896 // Parsing, optimization
897 PhaseGVN* initial_gvn() { return _initial_gvn; }
898 Unique_Node_List* for_igvn() { return _for_igvn; }
899 inline void record_for_igvn(Node* n); // Body is after class Unique_Node_List.
900 void set_initial_gvn(PhaseGVN *gvn) { _initial_gvn = gvn; }
901 void set_for_igvn(Unique_Node_List *for_igvn) { _for_igvn = for_igvn; }
902
903 // Replace n by nn using initial_gvn, calling hash_delete and
904 // record_for_igvn as needed.
905 void gvn_replace_by(Node* n, Node* nn);
906
907
908 void identify_useful_nodes(Unique_Node_List &useful);
909 void update_dead_node_list(Unique_Node_List &useful);
910 void remove_useless_nodes (Unique_Node_List &useful);
911
912 WarmCallInfo* warm_calls() const { return _warm_calls; }
913 void set_warm_calls(WarmCallInfo* l) { _warm_calls = l; }
914 WarmCallInfo* pop_warm_call();
915
916 // Record this CallGenerator for inlining at the end of parsing.
917 void add_late_inline(CallGenerator* cg) {
918 _late_inlines.insert_before(_late_inlines_pos, cg);
919 _late_inlines_pos++;
920 }
921
922 void prepend_late_inline(CallGenerator* cg) {
923 _late_inlines.insert_before(0, cg);
924 }
925
926 void add_string_late_inline(CallGenerator* cg) {
927 _string_late_inlines.push(cg);
928 }
929
930 void add_boxing_late_inline(CallGenerator* cg) {
931 _boxing_late_inlines.push(cg);
932 }
933
934 void remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful);
935
936 void process_print_inlining();
937 void dump_print_inlining();
938
939 bool over_inlining_cutoff() const {
940 if (!inlining_incrementally()) {
941 return unique() > (uint)NodeCountInliningCutoff;
942 } else {
943 return live_nodes() > (uint)LiveNodeCountInliningCutoff;
944 }
945 }
946
947 void inc_number_of_mh_late_inlines() { _number_of_mh_late_inlines++; }
948 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--; }
949 bool has_mh_late_inlines() const { return _number_of_mh_late_inlines > 0; }
950
951 void inline_incrementally_one(PhaseIterGVN& igvn);
952 void inline_incrementally(PhaseIterGVN& igvn);
953 void inline_string_calls(bool parse_time);
954 void inline_boxing_calls(PhaseIterGVN& igvn);
955
956 // Matching, CFG layout, allocation, code generation
957 PhaseCFG* cfg() { return _cfg; }
958 bool select_24_bit_instr() const { return _select_24_bit_instr; }
959 bool in_24_bit_fp_mode() const { return _in_24_bit_fp_mode; }
960 bool has_java_calls() const { return _java_calls > 0; }
961 int java_calls() const { return _java_calls; }
962 int inner_loops() const { return _inner_loops; }
963 Matcher* matcher() { return _matcher; }
964 PhaseRegAlloc* regalloc() { return _regalloc; }
965 int frame_slots() const { return _frame_slots; }
966 int frame_size_in_words() const; // frame_slots in units of the polymorphic 'words'
967 int frame_size_in_bytes() const { return _frame_slots << LogBytesPerInt; }
968 RegMask& FIRST_STACK_mask() { return _FIRST_STACK_mask; }
969 uint node_bundling_limit() { return _node_bundling_limit; }
970 Bundle* node_bundling_base() { return _node_bundling_base; }
971 void set_node_bundling_limit(uint n) { _node_bundling_limit = n; }
972 void set_node_bundling_base(Bundle* b) { _node_bundling_base = b; }
973 bool starts_bundle(const Node *n) const;
974 bool need_stack_bang(int frame_size_in_bytes) const;
975 bool need_register_stack_bang() const;
976
977 void update_interpreter_frame_size(int size) {
978 if (_interpreter_frame_size < size) {
979 _interpreter_frame_size = size;
980 }
981 }
982 int bang_size_in_bytes() const;
983
984 void set_matcher(Matcher* m) { _matcher = m; }
985 //void set_regalloc(PhaseRegAlloc* ra) { _regalloc = ra; }
986
987 // Remember if this compilation changes hardware mode to 24-bit precision
988 void set_24_bit_selection_and_mode(bool selection, bool mode) {
989 _select_24_bit_instr = selection;
990 _in_24_bit_fp_mode = mode;
991 }
992
993 void set_java_calls(int z) { _java_calls = z; }
994 void set_inner_loops(int z) { _inner_loops = z; }
995
996 // Instruction bits passed off to the VM
997 int code_size() { return _method_size; }
998 CodeBuffer* code_buffer() { return &_code_buffer; }
999 int first_block_size() { return _first_block_size; }
1000 void set_frame_complete(int off) { _code_offsets.set_value(CodeOffsets::Frame_Complete, off); }
1001 ExceptionHandlerTable* handler_table() { return &_handler_table; }
1002 ImplicitExceptionTable* inc_table() { return &_inc_table; }
1003 OopMapSet* oop_map_set() { return _oop_map_set; }
1004 DebugInformationRecorder* debug_info() { return env()->debug_info(); }
1005 Dependencies* dependencies() { return env()->dependencies(); }
1006 static int CompiledZap_count() { return _CompiledZap_count; }
1007 BufferBlob* scratch_buffer_blob() { return _scratch_buffer_blob; }
1008 void init_scratch_buffer_blob(int const_size);
1009 void clear_scratch_buffer_blob();
1010 void set_scratch_buffer_blob(BufferBlob* b) { _scratch_buffer_blob = b; }
1011 relocInfo* scratch_locs_memory() { return _scratch_locs_memory; }
1012 void set_scratch_locs_memory(relocInfo* b) { _scratch_locs_memory = b; }
1013
1014 // emit to scratch blob, report resulting size
1015 uint scratch_emit_size(const Node* n);
1016 void set_in_scratch_emit_size(bool x) { _in_scratch_emit_size = x; }
1017 bool in_scratch_emit_size() const { return _in_scratch_emit_size; }
1018
1019 enum ScratchBufferBlob {
1020 MAX_inst_size = 1024,
1021 MAX_locs_size = 128, // number of relocInfo elements
1022 MAX_const_size = 128,
1023 MAX_stubs_size = 128
1024 };
1025
1026 // Major entry point. Given a Scope, compile the associated method.
1027 // For normal compilations, entry_bci is InvocationEntryBci. For on stack
1028 // replacement, entry_bci indicates the bytecode for which to compile a
1029 // continuation.
1030 Compile(ciEnv* ci_env, C2Compiler* compiler, ciMethod* target,
1031 int entry_bci, bool subsume_loads, bool do_escape_analysis,
1032 bool eliminate_boxing);
1033
1034 // Second major entry point. From the TypeFunc signature, generate code
1035 // to pass arguments from the Java calling convention to the C calling
1036 // convention.
1037 Compile(ciEnv* ci_env, const TypeFunc *(*gen)(),
1038 address stub_function, const char *stub_name,
1039 int is_fancy_jump, bool pass_tls,
1040 bool save_arg_registers, bool return_pc);
1041
1042 // From the TypeFunc signature, generate code to pass arguments
1043 // from Compiled calling convention to Interpreter's calling convention
1044 void Generate_Compiled_To_Interpreter_Graph(const TypeFunc *tf, address interpreter_entry);
1045
1046 // From the TypeFunc signature, generate code to pass arguments
1047 // from Interpreter's calling convention to Compiler's calling convention
1048 void Generate_Interpreter_To_Compiled_Graph(const TypeFunc *tf);
1049
1050 // Are we compiling a method?
1051 bool has_method() { return method() != NULL; }
1052
1053 // Maybe print some information about this compile.
1054 void print_compile_messages();
1055
1056 // Final graph reshaping, a post-pass after the regular optimizer is done.
1057 bool final_graph_reshaping();
1058
1059 // returns true if adr is completely contained in the given alias category
1060 bool must_alias(const TypePtr* adr, int alias_idx);
1061
1062 // returns true if adr overlaps with the given alias category
1063 bool can_alias(const TypePtr* adr, int alias_idx);
1064
1065 // Driver for converting compiler's IR into machine code bits
1066 void Output();
1067
1068 // Accessors for node bundling info.
1069 Bundle* node_bundling(const Node *n);
1070 bool valid_bundle_info(const Node *n);
1071
1072 // Schedule and Bundle the instructions
1073 void ScheduleAndBundle();
1074
1075 // Build OopMaps for each GC point
1076 void BuildOopMaps();
1077
1078 // Append debug info for the node "local" at safepoint node "sfpt" to the
1079 // "array", May also consult and add to "objs", which describes the
1080 // scalar-replaced objects.
1081 void FillLocArray( int idx, MachSafePointNode* sfpt,
1082 Node *local, GrowableArray<ScopeValue*> *array,
1083 GrowableArray<ScopeValue*> *objs );
1084
1085 // If "objs" contains an ObjectValue whose id is "id", returns it, else NULL.
1086 static ObjectValue* sv_for_node_id(GrowableArray<ScopeValue*> *objs, int id);
1087 // Requres that "objs" does not contains an ObjectValue whose id matches
1088 // that of "sv. Appends "sv".
1089 static void set_sv_for_object_node(GrowableArray<ScopeValue*> *objs,
1090 ObjectValue* sv );
1091
1092 // Process an OopMap Element while emitting nodes
1093 void Process_OopMap_Node(MachNode *mach, int code_offset);
1094
1095 // Initialize code buffer
1096 CodeBuffer* init_buffer(uint* blk_starts);
1097
1098 // Write out basic block data to code buffer
1099 void fill_buffer(CodeBuffer* cb, uint* blk_starts);
1100
1101 // Determine which variable sized branches can be shortened
1102 void shorten_branches(uint* blk_starts, int& code_size, int& reloc_size, int& stub_size);
1103
1104 // Compute the size of first NumberOfLoopInstrToAlign instructions
1105 // at the head of a loop.
1106 void compute_loop_first_inst_sizes();
1107
1108 // Compute the information for the exception tables
1109 void FillExceptionTables(uint cnt, uint *call_returns, uint *inct_starts, Label *blk_labels);
1110
1111 // Stack slots that may be unused by the calling convention but must
1112 // otherwise be preserved. On Intel this includes the return address.
1113 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
1114 uint in_preserve_stack_slots();
1115
1116 // "Top of Stack" slots that may be unused by the calling convention but must
1117 // otherwise be preserved.
1118 // On Intel these are not necessary and the value can be zero.
1119 // On Sparc this describes the words reserved for storing a register window
1120 // when an interrupt occurs.
1121 static uint out_preserve_stack_slots();
1122
1123 // Number of outgoing stack slots killed above the out_preserve_stack_slots
1124 // for calls to C. Supports the var-args backing area for register parms.
1125 uint varargs_C_out_slots_killed() const;
1126
1127 // Number of Stack Slots consumed by a synchronization entry
1128 int sync_stack_slots() const;
1129
1130 // Compute the name of old_SP. See <arch>.ad for frame layout.
1131 OptoReg::Name compute_old_SP();
1132
1133 #ifdef ENABLE_ZAP_DEAD_LOCALS
1134 static bool is_node_getting_a_safepoint(Node*);
1135 void Insert_zap_nodes();
1136 Node* call_zap_node(MachSafePointNode* n, int block_no);
1137 #endif
1138
1139 private:
1140 // Phase control:
1141 void Init(int aliaslevel); // Prepare for a single compilation
1142 int Inline_Warm(); // Find more inlining work.
1143 void Finish_Warm(); // Give up on further inlines.
1144 void Optimize(); // Given a graph, optimize it
1145 void Code_Gen(); // Generate code from a graph
1146
1147 // Management of the AliasType table.
1148 void grow_alias_types();
1149 AliasCacheEntry* probe_alias_cache(const TypePtr* adr_type);
1150 const TypePtr *flatten_alias_type(const TypePtr* adr_type) const;
1151 AliasType* find_alias_type(const TypePtr* adr_type, bool no_create, ciField* field);
1152
1153 void verify_top(Node*) const PRODUCT_RETURN;
1154
1155 // Intrinsic setup.
1156 void register_library_intrinsics(); // initializer
1157 CallGenerator* make_vm_intrinsic(ciMethod* m, bool is_virtual); // constructor
1158 int intrinsic_insertion_index(ciMethod* m, bool is_virtual); // helper
1159 CallGenerator* find_intrinsic(ciMethod* m, bool is_virtual); // query fn
1160 void register_intrinsic(CallGenerator* cg); // update fn
1161
1162 #ifndef PRODUCT
1163 static juint _intrinsic_hist_count[vmIntrinsics::ID_LIMIT];
1164 static jubyte _intrinsic_hist_flags[vmIntrinsics::ID_LIMIT];
1165 #endif
1166 // Function calls made by the public function final_graph_reshaping.
1167 // No need to be made public as they are not called elsewhere.
1168 void final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc);
1169 void final_graph_reshaping_walk( Node_Stack &nstack, Node *root, Final_Reshape_Counts &frc );
1170 void eliminate_redundant_card_marks(Node* n);
1171
1172 public:
1173
1174 // Note: Histogram array size is about 1 Kb.
1175 enum { // flag bits:
1176 _intrinsic_worked = 1, // succeeded at least once
1177 _intrinsic_failed = 2, // tried it but it failed
1178 _intrinsic_disabled = 4, // was requested but disabled (e.g., -XX:-InlineUnsafeOps)
1179 _intrinsic_virtual = 8, // was seen in the virtual form (rare)
1180 _intrinsic_both = 16 // was seen in the non-virtual form (usual)
1181 };
1182 // Update histogram. Return boolean if this is a first-time occurrence.
1183 static bool gather_intrinsic_statistics(vmIntrinsics::ID id,
1184 bool is_virtual, int flags) PRODUCT_RETURN0;
1185 static void print_intrinsic_statistics() PRODUCT_RETURN;
1186
1187 // Graph verification code
1188 // Walk the node list, verifying that there is a one-to-one
1189 // correspondence between Use-Def edges and Def-Use edges
1190 // The option no_dead_code enables stronger checks that the
1191 // graph is strongly connected from root in both directions.
1192 void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN;
1193
1194 // Verify GC barrier patterns
1195 void verify_barriers() PRODUCT_RETURN;
1196
1197 // End-of-run dumps.
1198 static void print_statistics() PRODUCT_RETURN;
1199
1200 // Dump formatted assembly
1201 void dump_asm(int *pcs = NULL, uint pc_limit = 0) PRODUCT_RETURN;
1202 void dump_pc(int *pcs, int pc_limit, Node *n);
1203
1204 // Verify ADLC assumptions during startup
1205 static void adlc_verification() PRODUCT_RETURN;
1206
1207 // Definitions of pd methods
1208 static void pd_compiler2_init();
1209
1210 // Static parse-time type checking logic for gen_subtype_check:
1211 enum { SSC_always_false, SSC_always_true, SSC_easy_test, SSC_full_test };
1212 int static_subtype_check(ciKlass* superk, ciKlass* subk);
1213
1214 // Auxiliary method for randomized fuzzing/stressing
1215 static bool randomized_select(int count);
1216 };
1217
1218 #endif // SHARE_VM_OPTO_COMPILE_HPP