1 /*
2 * Copyright (c) 1997, 2013, 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/port.hpp"
36 #include "libadt/vectset.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "opto/idealGraphPrinter.hpp"
39 #include "opto/phasetype.hpp"
40 #include "opto/phase.hpp"
41 #include "opto/regmask.hpp"
42 #include "runtime/deoptimization.hpp"
43 #include "runtime/vmThread.hpp"
44 #include "trace/tracing.hpp"
45 #include "utilities/ticks.hpp"
46
47 class Block;
48 class Bundle;
49 class C2Compiler;
50 class CallGenerator;
51 class ConnectionGraph;
52 class InlineTree;
53 class Int_Array;
54 class Matcher;
55 class MachConstantNode;
56 class MachConstantBaseNode;
57 class MachNode;
58 class MachOper;
59 class MachSafePointNode;
60 class Node;
61 class Node_Array;
62 class Node_Notes;
63 class OptoReg;
64 class PhaseCFG;
65 class PhaseGVN;
66 class PhaseIterGVN;
67 class PhaseRegAlloc;
68 class PhaseCCP;
69 class PhaseCCP_DCE;
70 class RootNode;
71 class relocInfo;
72 class Scope;
73 class StartNode;
74 class SafePointNode;
75 class JVMState;
76 class Type;
77 class TypeData;
78 class TypePtr;
79 class TypeOopPtr;
80 class TypeFunc;
81 class Unique_Node_List;
82 class nmethod;
83 class WarmCallInfo;
84 class Node_Stack;
85 struct Final_Reshape_Counts;
86
87 //------------------------------Compile----------------------------------------
88 // This class defines a top-level Compiler invocation.
89
90 class Compile : public Phase {
91 friend class VMStructs;
92
93 public:
94 // Fixed alias indexes. (See also MergeMemNode.)
95 enum {
96 AliasIdxTop = 1, // pseudo-index, aliases to nothing (used as sentinel value)
97 AliasIdxBot = 2, // pseudo-index, aliases to everything
98 AliasIdxRaw = 3 // hard-wired index for TypeRawPtr::BOTTOM
99 };
100
101 // Variant of TraceTime(NULL, &_t_accumulator, TimeCompiler);
102 // Integrated with logging. If logging is turned on, and dolog is true,
103 // then brackets are put into the log, with time stamps and node counts.
104 // (The time collection itself is always conditionalized on TimeCompiler.)
105 class TracePhase : public TraceTime {
106 private:
107 Compile* C;
108 CompileLog* _log;
109 const char* _phase_name;
110 bool _dolog;
111 public:
112 TracePhase(const char* name, elapsedTimer* accumulator, bool dolog);
113 ~TracePhase();
114 };
115
116 // Information per category of alias (memory slice)
117 class AliasType {
118 private:
119 friend class Compile;
120
121 int _index; // unique index, used with MergeMemNode
122 const TypePtr* _adr_type; // normalized address type
123 ciField* _field; // relevant instance field, or null if none
124 const Type* _element; // relevant array element type, or null if none
125 bool _is_rewritable; // false if the memory is write-once only
126 int _general_index; // if this is type is an instance, the general
127 // type that this is an instance of
128
129 void Init(int i, const TypePtr* at);
130
131 public:
132 int index() const { return _index; }
133 const TypePtr* adr_type() const { return _adr_type; }
134 ciField* field() const { return _field; }
135 const Type* element() const { return _element; }
136 bool is_rewritable() const { return _is_rewritable; }
137 bool is_volatile() const { return (_field ? _field->is_volatile() : false); }
138 int general_index() const { return (_general_index != 0) ? _general_index : _index; }
139
140 void set_rewritable(bool z) { _is_rewritable = z; }
141 void set_field(ciField* f) {
142 assert(!_field,"");
143 _field = f;
144 if (f->is_final() || f->is_stable()) {
145 // In the case of @Stable, multiple writes are possible but may be assumed to be no-ops.
146 _is_rewritable = false;
147 }
148 }
149 void set_element(const Type* e) {
150 assert(_element == NULL, "");
151 _element = e;
152 }
153
154 void print_on(outputStream* st) PRODUCT_RETURN;
155 };
156
157 enum {
158 logAliasCacheSize = 6,
159 AliasCacheSize = (1<<logAliasCacheSize)
160 };
161 struct AliasCacheEntry { const TypePtr* _adr_type; int _index; }; // simple duple type
162 enum {
163 trapHistLength = MethodData::_trap_hist_limit
164 };
165
166 // Constant entry of the constant table.
167 class Constant {
168 private:
169 BasicType _type;
170 union {
171 jvalue _value;
172 Metadata* _metadata;
173 } _v;
174 int _offset; // offset of this constant (in bytes) relative to the constant table base.
175 float _freq;
176 bool _can_be_reused; // true (default) if the value can be shared with other users.
177
178 public:
179 Constant() : _type(T_ILLEGAL), _offset(-1), _freq(0.0f), _can_be_reused(true) { _v._value.l = 0; }
180 Constant(BasicType type, jvalue value, float freq = 0.0f, bool can_be_reused = true) :
181 _type(type),
182 _offset(-1),
183 _freq(freq),
184 _can_be_reused(can_be_reused)
185 {
186 assert(type != T_METADATA, "wrong constructor");
187 _v._value = value;
188 }
189 Constant(Metadata* metadata, bool can_be_reused = true) :
190 _type(T_METADATA),
191 _offset(-1),
192 _freq(0.0f),
193 _can_be_reused(can_be_reused)
194 {
195 _v._metadata = metadata;
196 }
197
198 bool operator==(const Constant& other);
199
200 BasicType type() const { return _type; }
201
202 jlong get_jlong() const { return _v._value.j; }
203 jfloat get_jfloat() const { return _v._value.f; }
204 jdouble get_jdouble() const { return _v._value.d; }
205 jobject get_jobject() const { return _v._value.l; }
206
207 Metadata* get_metadata() const { return _v._metadata; }
208
209 int offset() const { return _offset; }
210 void set_offset(int offset) { _offset = offset; }
211
212 float freq() const { return _freq; }
213 void inc_freq(float freq) { _freq += freq; }
214
215 bool can_be_reused() const { return _can_be_reused; }
216 };
217
218 // Constant table.
219 class ConstantTable {
220 private:
221 GrowableArray<Constant> _constants; // Constants of this table.
222 int _size; // Size in bytes the emitted constant table takes (including padding).
223 int _table_base_offset; // Offset of the table base that gets added to the constant offsets.
224 int _nof_jump_tables; // Number of jump-tables in this constant table.
225
226 static int qsort_comparator(Constant* a, Constant* b);
227
228 // We use negative frequencies to keep the order of the
229 // jump-tables in which they were added. Otherwise we get into
230 // trouble with relocation.
231 float next_jump_table_freq() { return -1.0f * (++_nof_jump_tables); }
232
233 public:
234 ConstantTable() :
235 _size(-1),
236 _table_base_offset(-1), // We can use -1 here since the constant table is always bigger than 2 bytes (-(size / 2), see MachConstantBaseNode::emit).
237 _nof_jump_tables(0)
238 {}
239
240 int size() const { assert(_size != -1, "not calculated yet"); return _size; }
241
242 int calculate_table_base_offset() const; // AD specific
243 void set_table_base_offset(int x) { assert(_table_base_offset == -1 || x == _table_base_offset, "can't change"); _table_base_offset = x; }
244 int table_base_offset() const { assert(_table_base_offset != -1, "not set yet"); return _table_base_offset; }
245
246 void emit(CodeBuffer& cb);
247
248 // Returns the offset of the last entry (the top) of the constant table.
249 int top_offset() const { assert(_constants.top().offset() != -1, "not bound yet"); return _constants.top().offset(); }
250
251 void calculate_offsets_and_size();
252 int find_offset(Constant& con) const;
253
254 void add(Constant& con);
255 Constant add(MachConstantNode* n, BasicType type, jvalue value);
256 Constant add(Metadata* metadata);
257 Constant add(MachConstantNode* n, MachOper* oper);
258 Constant add(MachConstantNode* n, jfloat f) {
259 jvalue value; value.f = f;
260 return add(n, T_FLOAT, value);
261 }
262 Constant add(MachConstantNode* n, jdouble d) {
263 jvalue value; value.d = d;
264 return add(n, T_DOUBLE, value);
265 }
266
267 // Jump-table
268 Constant add_jump_table(MachConstantNode* n);
269 void fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray<Label*> labels) const;
270 };
271
272 private:
273 // Fixed parameters to this compilation.
274 const int _compile_id;
275 const bool _save_argument_registers; // save/restore arg regs for trampolines
276 const bool _subsume_loads; // Load can be matched as part of a larger op.
277 const bool _do_escape_analysis; // Do escape analysis.
278 const bool _eliminate_boxing; // Do boxing elimination.
279 ciMethod* _method; // The method being compiled.
280 int _entry_bci; // entry bci for osr methods.
281 const TypeFunc* _tf; // My kind of signature
282 InlineTree* _ilt; // Ditto (temporary).
283 address _stub_function; // VM entry for stub being compiled, or NULL
284 const char* _stub_name; // Name of stub or adapter being compiled, or NULL
285 address _stub_entry_point; // Compile code entry for generated stub, or NULL
286
287 // Control of this compilation.
288 int _num_loop_opts; // Number of iterations for doing loop optimiztions
289 int _max_inline_size; // Max inline size for this compilation
290 int _freq_inline_size; // Max hot method inline size for this compilation
291 int _fixed_slots; // count of frame slots not allocated by the register
292 // allocator i.e. locks, original deopt pc, etc.
293 // For deopt
294 int _orig_pc_slot;
295 int _orig_pc_slot_offset_in_bytes;
296
297 int _major_progress; // Count of something big happening
298 bool _inlining_progress; // progress doing incremental inlining?
299 bool _inlining_incrementally;// Are we doing incremental inlining (post parse)
300 bool _has_loops; // True if the method _may_ have some loops
301 bool _has_split_ifs; // True if the method _may_ have some split-if
302 bool _has_unsafe_access; // True if the method _may_ produce faults in unsafe loads or stores.
303 bool _has_stringbuilder; // True StringBuffers or StringBuilders are allocated
304 bool _has_boxed_value; // True if a boxed object is allocated
305 int _max_vector_size; // Maximum size of generated vectors
306 uint _trap_hist[trapHistLength]; // Cumulative traps
307 bool _trap_can_recompile; // Have we emitted a recompiling trap?
308 uint _decompile_count; // Cumulative decompilation counts.
309 bool _do_inlining; // True if we intend to do inlining
310 bool _do_scheduling; // True if we intend to do scheduling
311 bool _do_freq_based_layout; // True if we intend to do frequency based block layout
312 bool _do_count_invocations; // True if we generate code to count invocations
313 bool _do_method_data_update; // True if we generate code to update MethodData*s
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 // JSR 292
323 bool _has_method_handle_invokes; // True if this method has MethodHandle invokes.
324 RTMState _rtm_state; // State of Restricted Transactional Memory usage
325
326 // Compilation environment.
327 Arena _comp_arena; // Arena with lifetime equivalent to Compile
328 ciEnv* _env; // CI interface
329 CompileLog* _log; // from CompilerThread
330 const char* _failure_reason; // for record_failure/failing pattern
331 GrowableArray<CallGenerator*>* _intrinsics; // List of intrinsics.
332 GrowableArray<Node*>* _macro_nodes; // List of nodes which need to be expanded before matching.
333 GrowableArray<Node*>* _predicate_opaqs; // List of Opaque1 nodes for the loop predicates.
334 GrowableArray<Node*>* _expensive_nodes; // List of nodes that are expensive to compute and that we'd better not let the GVN freely common
335 ConnectionGraph* _congraph;
336 #ifndef PRODUCT
337 IdealGraphPrinter* _printer;
338 #endif
339
340
341 // Node management
342 uint _unique; // Counter for unique Node indices
343 VectorSet _dead_node_list; // Set of dead nodes
344 uint _dead_node_count; // Number of dead nodes; VectorSet::Size() is O(N).
345 // So use this to keep count and make the call O(1).
346 debug_only(static int _debug_idx;) // Monotonic counter (not reset), use -XX:BreakAtNode=<idx>
347 Arena _node_arena; // Arena for new-space Nodes
348 Arena _old_arena; // Arena for old-space Nodes, lifetime during xform
349 RootNode* _root; // Unique root of compilation, or NULL after bail-out.
350 Node* _top; // Unique top node. (Reset by various phases.)
351
352 Node* _immutable_memory; // Initial memory state
353
354 Node* _recent_alloc_obj;
355 Node* _recent_alloc_ctl;
356
357 // Constant table
358 ConstantTable _constant_table; // The constant table for this compile.
359 MachConstantBaseNode* _mach_constant_base_node; // Constant table base node singleton.
360
361
362 // Blocked array of debugging and profiling information,
363 // tracked per node.
364 enum { _log2_node_notes_block_size = 8,
365 _node_notes_block_size = (1<<_log2_node_notes_block_size)
366 };
367 GrowableArray<Node_Notes*>* _node_note_array;
368 Node_Notes* _default_node_notes; // default notes for new nodes
369
370 // After parsing and every bulk phase we hang onto the Root instruction.
371 // The RootNode instruction is where the whole program begins. It produces
372 // the initial Control and BOTTOM for everybody else.
373
374 // Type management
375 Arena _Compile_types; // Arena for all types
376 Arena* _type_arena; // Alias for _Compile_types except in Initialize_shared()
377 Dict* _type_dict; // Intern table
378 void* _type_hwm; // Last allocation (see Type::operator new/delete)
379 size_t _type_last_size; // Last allocation size (see Type::operator new/delete)
380 ciMethod* _last_tf_m; // Cache for
381 const TypeFunc* _last_tf; // TypeFunc::make
382 AliasType** _alias_types; // List of alias types seen so far.
383 int _num_alias_types; // Logical length of _alias_types
384 int _max_alias_types; // Physical length of _alias_types
385 AliasCacheEntry _alias_cache[AliasCacheSize]; // Gets aliases w/o data structure walking
386
387 // Parsing, optimization
388 PhaseGVN* _initial_gvn; // Results of parse-time PhaseGVN
389 Unique_Node_List* _for_igvn; // Initial work-list for next round of Iterative GVN
390 WarmCallInfo* _warm_calls; // Sorted work-list for heat-based inlining.
391
392 GrowableArray<CallGenerator*> _late_inlines; // List of CallGenerators to be revisited after
393 // main parsing has finished.
394 GrowableArray<CallGenerator*> _string_late_inlines; // same but for string operations
395
396 GrowableArray<CallGenerator*> _boxing_late_inlines; // same but for boxing operations
397
398 int _late_inlines_pos; // Where in the queue should the next late inlining candidate go (emulate depth first inlining)
399 uint _number_of_mh_late_inlines; // number of method handle late inlining still pending
400
401
402 // Inlining may not happen in parse order which would make
403 // PrintInlining output confusing. Keep track of PrintInlining
404 // pieces in order.
405 class PrintInliningBuffer : public ResourceObj {
406 private:
407 CallGenerator* _cg;
408 stringStream* _ss;
409
410 public:
411 PrintInliningBuffer()
412 : _cg(NULL) { _ss = new stringStream(); }
413
414 stringStream* ss() const { return _ss; }
415 CallGenerator* cg() const { return _cg; }
416 void set_cg(CallGenerator* cg) { _cg = cg; }
417 };
418
419 stringStream* _print_inlining_stream;
420 GrowableArray<PrintInliningBuffer>* _print_inlining_list;
421 int _print_inlining_idx;
422
423 // Only keep nodes in the expensive node list that need to be optimized
424 void cleanup_expensive_nodes(PhaseIterGVN &igvn);
425 // Use for sorting expensive nodes to bring similar nodes together
426 static int cmp_expensive_nodes(Node** n1, Node** n2);
427 // Expensive nodes list already sorted?
428 bool expensive_nodes_sorted() const;
429 // Remove the speculative part of types and clean up the graph
430 void remove_speculative_types(PhaseIterGVN &igvn);
431
432 // Are we within a PreserveJVMState block?
433 int _preserve_jvm_state;
434
435 void* _replay_inline_data; // Pointer to data loaded from file
436
437 void print_inlining_init();
438 void print_inlining_reinit();
439 void print_inlining_commit();
440 void print_inlining_push();
441 PrintInliningBuffer& print_inlining_current();
442
443 void log_late_inline_failure(CallGenerator* cg, const char* msg);
444
445 public:
446
447 outputStream* print_inlining_stream() const {
448 assert(print_inlining() || print_intrinsics(), "PrintInlining off?");
449 return _print_inlining_stream;
450 }
451
452 void print_inlining_update(CallGenerator* cg);
453 void print_inlining_update_delayed(CallGenerator* cg);
454 void print_inlining_move_to(CallGenerator* cg);
455 void print_inlining_assert_ready();
456 void print_inlining_reset();
457
458 void print_inlining(ciMethod* method, int inline_level, int bci, const char* msg = NULL) {
459 stringStream ss;
460 CompileTask::print_inlining(&ss, method, inline_level, bci, msg);
461 print_inlining_stream()->print(ss.as_string());
462 }
463
464 void log_late_inline(CallGenerator* cg);
465 void log_inline_id(CallGenerator* cg);
466 void log_inline_failure(const char* msg);
467
468 void* replay_inline_data() const { return _replay_inline_data; }
469
470 // Dump inlining replay data to the stream.
471 void dump_inline_data(outputStream* out);
472
473 private:
474 // Matching, CFG layout, allocation, code generation
475 PhaseCFG* _cfg; // Results of CFG finding
476 bool _select_24_bit_instr; // We selected an instruction with a 24-bit result
477 bool _in_24_bit_fp_mode; // We are emitting instructions with 24-bit results
478 int _java_calls; // Number of java calls in the method
479 int _inner_loops; // Number of inner loops in the method
480 Matcher* _matcher; // Engine to map ideal to machine instructions
481 PhaseRegAlloc* _regalloc; // Results of register allocation.
482 int _frame_slots; // Size of total frame in stack slots
483 CodeOffsets _code_offsets; // Offsets into the code for various interesting entries
484 RegMask _FIRST_STACK_mask; // All stack slots usable for spills (depends on frame layout)
485 Arena* _indexSet_arena; // control IndexSet allocation within PhaseChaitin
486 void* _indexSet_free_block_list; // free list of IndexSet bit blocks
487 int _interpreter_frame_size;
488
489 uint _node_bundling_limit;
490 Bundle* _node_bundling_base; // Information for instruction bundling
491
492 // Instruction bits passed off to the VM
493 int _method_size; // Size of nmethod code segment in bytes
494 CodeBuffer _code_buffer; // Where the code is assembled
495 int _first_block_size; // Size of unvalidated entry point code / OSR poison code
496 ExceptionHandlerTable _handler_table; // Table of native-code exception handlers
497 ImplicitExceptionTable _inc_table; // Table of implicit null checks in native code
498 OopMapSet* _oop_map_set; // Table of oop maps (one for each safepoint location)
499 static int _CompiledZap_count; // counter compared against CompileZap[First/Last]
500 BufferBlob* _scratch_buffer_blob; // For temporary code buffers.
501 relocInfo* _scratch_locs_memory; // For temporary code buffers.
502 int _scratch_const_size; // For temporary code buffers.
503 bool _in_scratch_emit_size; // true when in scratch_emit_size.
504
505 public:
506 // Accessors
507
508 // The Compile instance currently active in this (compiler) thread.
509 static Compile* current() {
510 return (Compile*) ciEnv::current()->compiler_data();
511 }
512
513 // ID for this compilation. Useful for setting breakpoints in the debugger.
514 int compile_id() const { return _compile_id; }
515
516 // Does this compilation allow instructions to subsume loads? User
517 // instructions that subsume a load may result in an unschedulable
518 // instruction sequence.
519 bool subsume_loads() const { return _subsume_loads; }
520 /** Do escape analysis. */
521 bool do_escape_analysis() const { return _do_escape_analysis; }
522 /** Do boxing elimination. */
523 bool eliminate_boxing() const { return _eliminate_boxing; }
524 /** Do aggressive boxing elimination. */
525 bool aggressive_unboxing() const { return _eliminate_boxing && AggressiveUnboxing; }
526 bool save_argument_registers() const { return _save_argument_registers; }
527
528
529 // Other fixed compilation parameters.
530 ciMethod* method() const { return _method; }
531 int entry_bci() const { return _entry_bci; }
532 bool is_osr_compilation() const { return _entry_bci != InvocationEntryBci; }
533 bool is_method_compilation() const { return (_method != NULL && !_method->flags().is_native()); }
534 const TypeFunc* tf() const { assert(_tf!=NULL, ""); return _tf; }
535 void init_tf(const TypeFunc* tf) { assert(_tf==NULL, ""); _tf = tf; }
536 InlineTree* ilt() const { return _ilt; }
537 address stub_function() const { return _stub_function; }
538 const char* stub_name() const { return _stub_name; }
539 address stub_entry_point() const { return _stub_entry_point; }
540
541 // Control of this compilation.
542 int fixed_slots() const { assert(_fixed_slots >= 0, ""); return _fixed_slots; }
543 void set_fixed_slots(int n) { _fixed_slots = n; }
544 int major_progress() const { return _major_progress; }
545 void set_inlining_progress(bool z) { _inlining_progress = z; }
546 int inlining_progress() const { return _inlining_progress; }
547 void set_inlining_incrementally(bool z) { _inlining_incrementally = z; }
548 int inlining_incrementally() const { return _inlining_incrementally; }
549 void set_major_progress() { _major_progress++; }
550 void clear_major_progress() { _major_progress = 0; }
551 int num_loop_opts() const { return _num_loop_opts; }
552 void set_num_loop_opts(int n) { _num_loop_opts = n; }
553 int max_inline_size() const { return _max_inline_size; }
554 void set_freq_inline_size(int n) { _freq_inline_size = n; }
555 int freq_inline_size() const { return _freq_inline_size; }
556 void set_max_inline_size(int n) { _max_inline_size = n; }
557 bool has_loops() const { return _has_loops; }
558 void set_has_loops(bool z) { _has_loops = z; }
559 bool has_split_ifs() const { return _has_split_ifs; }
560 void set_has_split_ifs(bool z) { _has_split_ifs = z; }
561 bool has_unsafe_access() const { return _has_unsafe_access; }
562 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; }
563 bool has_stringbuilder() const { return _has_stringbuilder; }
564 void set_has_stringbuilder(bool z) { _has_stringbuilder = z; }
565 bool has_boxed_value() const { return _has_boxed_value; }
566 void set_has_boxed_value(bool z) { _has_boxed_value = z; }
567 int max_vector_size() const { return _max_vector_size; }
568 void set_max_vector_size(int s) { _max_vector_size = s; }
569 void set_trap_count(uint r, uint c) { assert(r < trapHistLength, "oob"); _trap_hist[r] = c; }
570 uint trap_count(uint r) const { assert(r < trapHistLength, "oob"); return _trap_hist[r]; }
571 bool trap_can_recompile() const { return _trap_can_recompile; }
572 void set_trap_can_recompile(bool z) { _trap_can_recompile = z; }
573 uint decompile_count() const { return _decompile_count; }
574 void set_decompile_count(uint c) { _decompile_count = c; }
575 bool allow_range_check_smearing() const;
576 bool do_inlining() const { return _do_inlining; }
577 void set_do_inlining(bool z) { _do_inlining = z; }
578 bool do_scheduling() const { return _do_scheduling; }
579 void set_do_scheduling(bool z) { _do_scheduling = z; }
580 bool do_freq_based_layout() const{ return _do_freq_based_layout; }
581 void set_do_freq_based_layout(bool z){ _do_freq_based_layout = z; }
582 bool do_count_invocations() const{ return _do_count_invocations; }
583 void set_do_count_invocations(bool z){ _do_count_invocations = z; }
584 bool do_method_data_update() const { return _do_method_data_update; }
585 void set_do_method_data_update(bool z) { _do_method_data_update = z; }
586 int AliasLevel() const { return _AliasLevel; }
587 bool print_assembly() const { return _print_assembly; }
588 void set_print_assembly(bool z) { _print_assembly = z; }
589 bool print_inlining() const { return _print_inlining; }
590 void set_print_inlining(bool z) { _print_inlining = z; }
591 bool print_intrinsics() const { return _print_intrinsics; }
592 void set_print_intrinsics(bool z) { _print_intrinsics = z; }
593 RTMState rtm_state() const { return _rtm_state; }
594 void set_rtm_state(RTMState s) { _rtm_state = s; }
595 bool use_rtm() const { return (_rtm_state & NoRTM) == 0; }
596 bool profile_rtm() const { return _rtm_state == ProfileRTM; }
597 // check the CompilerOracle for special behaviours for this compile
598 bool method_has_option(const char * option) {
599 return method() != NULL && method()->has_option(option);
600 }
601 #ifndef PRODUCT
602 bool trace_opto_output() const { return _trace_opto_output; }
603 bool parsed_irreducible_loop() const { return _parsed_irreducible_loop; }
604 void set_parsed_irreducible_loop(bool z) { _parsed_irreducible_loop = z; }
605 int _in_dump_cnt; // Required for dumping ir nodes.
606 #endif
607
608 // JSR 292
609 bool has_method_handle_invokes() const { return _has_method_handle_invokes; }
610 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; }
611
612 Ticks _latest_stage_start_counter;
613
614 void begin_method() {
615 #ifndef PRODUCT
616 if (_printer) _printer->begin_method(this);
617 #endif
618 C->_latest_stage_start_counter.stamp();
619 }
620
621 void print_method(CompilerPhaseType cpt, int level = 1) {
622 EventCompilerPhase event;
623 if (event.should_commit()) {
624 event.set_starttime(C->_latest_stage_start_counter);
625 event.set_phase((u1) cpt);
626 event.set_compileID(C->_compile_id);
627 event.set_phaseLevel(level);
628 event.commit();
629 }
630
631
632 #ifndef PRODUCT
633 if (_printer) _printer->print_method(this, CompilerPhaseTypeHelper::to_string(cpt), level);
634 #endif
635 C->_latest_stage_start_counter.stamp();
636 }
637
638 void end_method(int level = 1) {
639 EventCompilerPhase event;
640 if (event.should_commit()) {
641 event.set_starttime(C->_latest_stage_start_counter);
642 event.set_phase((u1) PHASE_END);
643 event.set_compileID(C->_compile_id);
644 event.set_phaseLevel(level);
645 event.commit();
646 }
647 #ifndef PRODUCT
648 if (_printer) _printer->end_method();
649 #endif
650 }
651
652 int macro_count() const { return _macro_nodes->length(); }
653 int predicate_count() const { return _predicate_opaqs->length();}
654 int expensive_count() const { return _expensive_nodes->length(); }
655 Node* macro_node(int idx) const { return _macro_nodes->at(idx); }
656 Node* predicate_opaque1_node(int idx) const { return _predicate_opaqs->at(idx);}
657 Node* expensive_node(int idx) const { return _expensive_nodes->at(idx); }
658 ConnectionGraph* congraph() { return _congraph;}
659 void set_congraph(ConnectionGraph* congraph) { _congraph = congraph;}
660 void add_macro_node(Node * n) {
661 //assert(n->is_macro(), "must be a macro node");
662 assert(!_macro_nodes->contains(n), " duplicate entry in expand list");
663 _macro_nodes->append(n);
664 }
665 void remove_macro_node(Node * n) {
666 // this function may be called twice for a node so check
667 // that the node is in the array before attempting to remove it
668 if (_macro_nodes->contains(n))
669 _macro_nodes->remove(n);
670 // remove from _predicate_opaqs list also if it is there
671 if (predicate_count() > 0 && _predicate_opaqs->contains(n)){
672 _predicate_opaqs->remove(n);
673 }
674 }
675 void add_expensive_node(Node * n);
676 void remove_expensive_node(Node * n) {
677 if (_expensive_nodes->contains(n)) {
678 _expensive_nodes->remove(n);
679 }
680 }
681 void add_predicate_opaq(Node * n) {
682 assert(!_predicate_opaqs->contains(n), " duplicate entry in predicate opaque1");
683 assert(_macro_nodes->contains(n), "should have already been in macro list");
684 _predicate_opaqs->append(n);
685 }
686 // remove the opaque nodes that protect the predicates so that the unused checks and
687 // uncommon traps will be eliminated from the graph.
688 void cleanup_loop_predicates(PhaseIterGVN &igvn);
689 bool is_predicate_opaq(Node * n) {
690 return _predicate_opaqs->contains(n);
691 }
692
693 // Are there candidate expensive nodes for optimization?
694 bool should_optimize_expensive_nodes(PhaseIterGVN &igvn);
695 // Check whether n1 and n2 are similar
696 static int cmp_expensive_nodes(Node* n1, Node* n2);
697 // Sort expensive nodes to locate similar expensive nodes
698 void sort_expensive_nodes();
699
700 // Compilation environment.
701 Arena* comp_arena() { return &_comp_arena; }
702 ciEnv* env() const { return _env; }
703 CompileLog* log() const { return _log; }
704 bool failing() const { return _env->failing() || _failure_reason != NULL; }
705 const char* failure_reason() { return _failure_reason; }
706 bool failure_reason_is(const char* r) { return (r==_failure_reason) || (r!=NULL && _failure_reason!=NULL && strcmp(r, _failure_reason)==0); }
707
708 void record_failure(const char* reason);
709 void record_method_not_compilable(const char* reason, bool all_tiers = false) {
710 // All bailouts cover "all_tiers" when TieredCompilation is off.
711 if (!TieredCompilation) all_tiers = true;
712 env()->record_method_not_compilable(reason, all_tiers);
713 // Record failure reason.
714 record_failure(reason);
715 }
716 void record_method_not_compilable_all_tiers(const char* reason) {
717 record_method_not_compilable(reason, true);
718 }
719 bool check_node_count(uint margin, const char* reason) {
720 if (live_nodes() + margin > (uint)MaxNodeLimit) {
721 record_method_not_compilable(reason);
722 return true;
723 } else {
724 return false;
725 }
726 }
727
728 // Node management
729 uint unique() const { return _unique; }
730 uint next_unique() { return _unique++; }
731 void set_unique(uint i) { _unique = i; }
732 static int debug_idx() { return debug_only(_debug_idx)+0; }
733 static void set_debug_idx(int i) { debug_only(_debug_idx = i); }
734 Arena* node_arena() { return &_node_arena; }
735 Arena* old_arena() { return &_old_arena; }
736 RootNode* root() const { return _root; }
737 void set_root(RootNode* r) { _root = r; }
738 StartNode* start() const; // (Derived from root.)
739 void init_start(StartNode* s);
740 Node* immutable_memory();
741
742 Node* recent_alloc_ctl() const { return _recent_alloc_ctl; }
743 Node* recent_alloc_obj() const { return _recent_alloc_obj; }
744 void set_recent_alloc(Node* ctl, Node* obj) {
745 _recent_alloc_ctl = ctl;
746 _recent_alloc_obj = obj;
747 }
748 void record_dead_node(uint idx) { if (_dead_node_list.test_set(idx)) return;
749 _dead_node_count++;
750 }
751 bool is_dead_node(uint idx) { return _dead_node_list.test(idx) != 0; }
752 uint dead_node_count() { return _dead_node_count; }
753 void reset_dead_node_list() { _dead_node_list.Reset();
754 _dead_node_count = 0;
755 }
756 uint live_nodes() const {
757 int val = _unique - _dead_node_count;
758 assert (val >= 0, err_msg_res("number of tracked dead nodes %d more than created nodes %d", _unique, _dead_node_count));
759 return (uint) val;
760 }
761 #ifdef ASSERT
762 uint count_live_nodes_by_graph_walk();
763 void print_missing_nodes();
764 #endif
765
766 // Constant table
767 ConstantTable& constant_table() { return _constant_table; }
768
769 MachConstantBaseNode* mach_constant_base_node();
770 bool has_mach_constant_base_node() const { return _mach_constant_base_node != NULL; }
771 // Generated by adlc, true if CallNode requires MachConstantBase.
772 bool needs_clone_jvms();
773
774 // Handy undefined Node
775 Node* top() const { return _top; }
776
777 // these are used by guys who need to know about creation and transformation of top:
778 Node* cached_top_node() { return _top; }
779 void set_cached_top_node(Node* tn);
780
781 GrowableArray<Node_Notes*>* node_note_array() const { return _node_note_array; }
782 void set_node_note_array(GrowableArray<Node_Notes*>* arr) { _node_note_array = arr; }
783 Node_Notes* default_node_notes() const { return _default_node_notes; }
784 void set_default_node_notes(Node_Notes* n) { _default_node_notes = n; }
785
786 Node_Notes* node_notes_at(int idx) {
787 return locate_node_notes(_node_note_array, idx, false);
788 }
789 inline bool set_node_notes_at(int idx, Node_Notes* value);
790
791 // Copy notes from source to dest, if they exist.
792 // Overwrite dest only if source provides something.
793 // Return true if information was moved.
794 bool copy_node_notes_to(Node* dest, Node* source);
795
796 // Workhorse function to sort out the blocked Node_Notes array:
797 inline Node_Notes* locate_node_notes(GrowableArray<Node_Notes*>* arr,
798 int idx, bool can_grow = false);
799
800 void grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by);
801
802 // Type management
803 Arena* type_arena() { return _type_arena; }
804 Dict* type_dict() { return _type_dict; }
805 void* type_hwm() { return _type_hwm; }
806 size_t type_last_size() { return _type_last_size; }
807 int num_alias_types() { return _num_alias_types; }
808
809 void init_type_arena() { _type_arena = &_Compile_types; }
810 void set_type_arena(Arena* a) { _type_arena = a; }
811 void set_type_dict(Dict* d) { _type_dict = d; }
812 void set_type_hwm(void* p) { _type_hwm = p; }
813 void set_type_last_size(size_t sz) { _type_last_size = sz; }
814
815 const TypeFunc* last_tf(ciMethod* m) {
816 return (m == _last_tf_m) ? _last_tf : NULL;
817 }
818 void set_last_tf(ciMethod* m, const TypeFunc* tf) {
819 assert(m != NULL || tf == NULL, "");
820 _last_tf_m = m;
821 _last_tf = tf;
822 }
823
824 AliasType* alias_type(int idx) { assert(idx < num_alias_types(), "oob"); return _alias_types[idx]; }
825 AliasType* alias_type(const TypePtr* adr_type, ciField* field = NULL) { return find_alias_type(adr_type, false, field); }
826 bool have_alias_type(const TypePtr* adr_type);
827 AliasType* alias_type(ciField* field);
828
829 int get_alias_index(const TypePtr* at) { return alias_type(at)->index(); }
830 const TypePtr* get_adr_type(uint aidx) { return alias_type(aidx)->adr_type(); }
831 int get_general_index(uint aidx) { return alias_type(aidx)->general_index(); }
832
833 // Building nodes
834 void rethrow_exceptions(JVMState* jvms);
835 void return_values(JVMState* jvms);
836 JVMState* build_start_state(StartNode* start, const TypeFunc* tf);
837
838 // Decide how to build a call.
839 // The profile factor is a discount to apply to this site's interp. profile.
840 CallGenerator* call_generator(ciMethod* call_method, int vtable_index, bool call_does_dispatch,
841 JVMState* jvms, bool allow_inline, float profile_factor, ciKlass* speculative_receiver_type = NULL,
842 bool allow_intrinsics = true, bool delayed_forbidden = false);
843 bool should_delay_inlining(ciMethod* call_method, JVMState* jvms) {
844 return should_delay_string_inlining(call_method, jvms) ||
845 should_delay_boxing_inlining(call_method, jvms);
846 }
847 bool should_delay_string_inlining(ciMethod* call_method, JVMState* jvms);
848 bool should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms);
849
850 // Helper functions to identify inlining potential at call-site
851 ciMethod* optimize_virtual_call(ciMethod* caller, int bci, ciInstanceKlass* klass,
852 ciMethod* callee, const TypeOopPtr* receiver_type,
853 bool is_virtual,
854 bool &call_does_dispatch, int &vtable_index);
855 ciMethod* optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass,
856 ciMethod* callee, const TypeOopPtr* receiver_type);
857
858 // Report if there were too many traps at a current method and bci.
859 // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded.
860 // If there is no MDO at all, report no trap unless told to assume it.
861 bool too_many_traps(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
862 // This version, unspecific to a particular bci, asks if
863 // PerMethodTrapLimit was exceeded for all inlined methods seen so far.
864 bool too_many_traps(Deoptimization::DeoptReason reason,
865 // Privately used parameter for logging:
866 ciMethodData* logmd = NULL);
867 // Report if there were too many recompiles at a method and bci.
868 bool too_many_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
869 // Return a bitset with the reasons where deoptimization is allowed,
870 // i.e., where there were not too many uncommon traps.
871 int _allowed_reasons;
872 int allowed_deopt_reasons() { return _allowed_reasons; }
873 void set_allowed_deopt_reasons();
874
875 // Parsing, optimization
876 PhaseGVN* initial_gvn() { return _initial_gvn; }
877 Unique_Node_List* for_igvn() { return _for_igvn; }
878 inline void record_for_igvn(Node* n); // Body is after class Unique_Node_List.
879 void set_initial_gvn(PhaseGVN *gvn) { _initial_gvn = gvn; }
880 void set_for_igvn(Unique_Node_List *for_igvn) { _for_igvn = for_igvn; }
881
882 // Replace n by nn using initial_gvn, calling hash_delete and
883 // record_for_igvn as needed.
884 void gvn_replace_by(Node* n, Node* nn);
885
886
887 void identify_useful_nodes(Unique_Node_List &useful);
888 void update_dead_node_list(Unique_Node_List &useful);
889 void remove_useless_nodes (Unique_Node_List &useful);
890
891 WarmCallInfo* warm_calls() const { return _warm_calls; }
892 void set_warm_calls(WarmCallInfo* l) { _warm_calls = l; }
893 WarmCallInfo* pop_warm_call();
894
895 // Record this CallGenerator for inlining at the end of parsing.
896 void add_late_inline(CallGenerator* cg) {
897 _late_inlines.insert_before(_late_inlines_pos, cg);
898 _late_inlines_pos++;
899 }
900
901 void prepend_late_inline(CallGenerator* cg) {
902 _late_inlines.insert_before(0, cg);
903 }
904
905 void add_string_late_inline(CallGenerator* cg) {
906 _string_late_inlines.push(cg);
907 }
908
909 void add_boxing_late_inline(CallGenerator* cg) {
910 _boxing_late_inlines.push(cg);
911 }
912
913 void remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful);
914
915 void dump_inlining();
916
917 bool over_inlining_cutoff() const {
918 if (!inlining_incrementally()) {
919 return unique() > (uint)NodeCountInliningCutoff;
920 } else {
921 return live_nodes() > (uint)LiveNodeCountInliningCutoff;
922 }
923 }
924
925 void inc_number_of_mh_late_inlines() { _number_of_mh_late_inlines++; }
926 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--; }
927 bool has_mh_late_inlines() const { return _number_of_mh_late_inlines > 0; }
928
929 void inline_incrementally_one(PhaseIterGVN& igvn);
930 void inline_incrementally(PhaseIterGVN& igvn);
931 void inline_string_calls(bool parse_time);
932 void inline_boxing_calls(PhaseIterGVN& igvn);
933
934 // Matching, CFG layout, allocation, code generation
935 PhaseCFG* cfg() { return _cfg; }
936 bool select_24_bit_instr() const { return _select_24_bit_instr; }
937 bool in_24_bit_fp_mode() const { return _in_24_bit_fp_mode; }
938 bool has_java_calls() const { return _java_calls > 0; }
939 int java_calls() const { return _java_calls; }
940 int inner_loops() const { return _inner_loops; }
941 Matcher* matcher() { return _matcher; }
942 PhaseRegAlloc* regalloc() { return _regalloc; }
943 int frame_slots() const { return _frame_slots; }
944 int frame_size_in_words() const; // frame_slots in units of the polymorphic 'words'
945 int frame_size_in_bytes() const { return _frame_slots << LogBytesPerInt; }
946 RegMask& FIRST_STACK_mask() { return _FIRST_STACK_mask; }
947 Arena* indexSet_arena() { return _indexSet_arena; }
948 void* indexSet_free_block_list() { return _indexSet_free_block_list; }
949 uint node_bundling_limit() { return _node_bundling_limit; }
950 Bundle* node_bundling_base() { return _node_bundling_base; }
951 void set_node_bundling_limit(uint n) { _node_bundling_limit = n; }
952 void set_node_bundling_base(Bundle* b) { _node_bundling_base = b; }
953 bool starts_bundle(const Node *n) const;
954 bool need_stack_bang(int frame_size_in_bytes) const;
955 bool need_register_stack_bang() const;
956
957 void update_interpreter_frame_size(int size) {
958 if (_interpreter_frame_size < size) {
959 _interpreter_frame_size = size;
960 }
961 }
962 int bang_size_in_bytes() const;
963
964 void set_matcher(Matcher* m) { _matcher = m; }
965 //void set_regalloc(PhaseRegAlloc* ra) { _regalloc = ra; }
966 void set_indexSet_arena(Arena* a) { _indexSet_arena = a; }
967 void set_indexSet_free_block_list(void* p) { _indexSet_free_block_list = p; }
968
969 // Remember if this compilation changes hardware mode to 24-bit precision
970 void set_24_bit_selection_and_mode(bool selection, bool mode) {
971 _select_24_bit_instr = selection;
972 _in_24_bit_fp_mode = mode;
973 }
974
975 void set_java_calls(int z) { _java_calls = z; }
976 void set_inner_loops(int z) { _inner_loops = z; }
977
978 // Instruction bits passed off to the VM
979 int code_size() { return _method_size; }
980 CodeBuffer* code_buffer() { return &_code_buffer; }
981 int first_block_size() { return _first_block_size; }
982 void set_frame_complete(int off) { _code_offsets.set_value(CodeOffsets::Frame_Complete, off); }
983 ExceptionHandlerTable* handler_table() { return &_handler_table; }
984 ImplicitExceptionTable* inc_table() { return &_inc_table; }
985 OopMapSet* oop_map_set() { return _oop_map_set; }
986 DebugInformationRecorder* debug_info() { return env()->debug_info(); }
987 Dependencies* dependencies() { return env()->dependencies(); }
988 static int CompiledZap_count() { return _CompiledZap_count; }
989 BufferBlob* scratch_buffer_blob() { return _scratch_buffer_blob; }
990 void init_scratch_buffer_blob(int const_size);
991 void clear_scratch_buffer_blob();
992 void set_scratch_buffer_blob(BufferBlob* b) { _scratch_buffer_blob = b; }
993 relocInfo* scratch_locs_memory() { return _scratch_locs_memory; }
994 void set_scratch_locs_memory(relocInfo* b) { _scratch_locs_memory = b; }
995
996 // emit to scratch blob, report resulting size
997 uint scratch_emit_size(const Node* n);
998 void set_in_scratch_emit_size(bool x) { _in_scratch_emit_size = x; }
999 bool in_scratch_emit_size() const { return _in_scratch_emit_size; }
1000
1001 enum ScratchBufferBlob {
1002 MAX_inst_size = 1024,
1003 MAX_locs_size = 128, // number of relocInfo elements
1004 MAX_const_size = 128,
1005 MAX_stubs_size = 128
1006 };
1007
1008 // Major entry point. Given a Scope, compile the associated method.
1009 // For normal compilations, entry_bci is InvocationEntryBci. For on stack
1010 // replacement, entry_bci indicates the bytecode for which to compile a
1011 // continuation.
1012 Compile(ciEnv* ci_env, C2Compiler* compiler, ciMethod* target,
1013 int entry_bci, bool subsume_loads, bool do_escape_analysis,
1014 bool eliminate_boxing);
1015
1016 // Second major entry point. From the TypeFunc signature, generate code
1017 // to pass arguments from the Java calling convention to the C calling
1018 // convention.
1019 Compile(ciEnv* ci_env, const TypeFunc *(*gen)(),
1020 address stub_function, const char *stub_name,
1021 int is_fancy_jump, bool pass_tls,
1022 bool save_arg_registers, bool return_pc);
1023
1024 // From the TypeFunc signature, generate code to pass arguments
1025 // from Compiled calling convention to Interpreter's calling convention
1026 void Generate_Compiled_To_Interpreter_Graph(const TypeFunc *tf, address interpreter_entry);
1027
1028 // From the TypeFunc signature, generate code to pass arguments
1029 // from Interpreter's calling convention to Compiler's calling convention
1030 void Generate_Interpreter_To_Compiled_Graph(const TypeFunc *tf);
1031
1032 // Are we compiling a method?
1033 bool has_method() { return method() != NULL; }
1034
1035 // Maybe print some information about this compile.
1036 void print_compile_messages();
1037
1038 // Final graph reshaping, a post-pass after the regular optimizer is done.
1039 bool final_graph_reshaping();
1040
1041 // returns true if adr is completely contained in the given alias category
1042 bool must_alias(const TypePtr* adr, int alias_idx);
1043
1044 // returns true if adr overlaps with the given alias category
1045 bool can_alias(const TypePtr* adr, int alias_idx);
1046
1047 // Driver for converting compiler's IR into machine code bits
1048 void Output();
1049
1050 // Accessors for node bundling info.
1051 Bundle* node_bundling(const Node *n);
1052 bool valid_bundle_info(const Node *n);
1053
1054 // Schedule and Bundle the instructions
1055 void ScheduleAndBundle();
1056
1057 // Build OopMaps for each GC point
1058 void BuildOopMaps();
1059
1060 // Append debug info for the node "local" at safepoint node "sfpt" to the
1061 // "array", May also consult and add to "objs", which describes the
1062 // scalar-replaced objects.
1063 void FillLocArray( int idx, MachSafePointNode* sfpt,
1064 Node *local, GrowableArray<ScopeValue*> *array,
1065 GrowableArray<ScopeValue*> *objs );
1066
1067 // If "objs" contains an ObjectValue whose id is "id", returns it, else NULL.
1068 static ObjectValue* sv_for_node_id(GrowableArray<ScopeValue*> *objs, int id);
1069 // Requres that "objs" does not contains an ObjectValue whose id matches
1070 // that of "sv. Appends "sv".
1071 static void set_sv_for_object_node(GrowableArray<ScopeValue*> *objs,
1072 ObjectValue* sv );
1073
1074 // Process an OopMap Element while emitting nodes
1075 void Process_OopMap_Node(MachNode *mach, int code_offset);
1076
1077 // Initialize code buffer
1078 CodeBuffer* init_buffer(uint* blk_starts);
1079
1080 // Write out basic block data to code buffer
1081 void fill_buffer(CodeBuffer* cb, uint* blk_starts);
1082
1083 // Determine which variable sized branches can be shortened
1084 void shorten_branches(uint* blk_starts, int& code_size, int& reloc_size, int& stub_size);
1085
1086 // Compute the size of first NumberOfLoopInstrToAlign instructions
1087 // at the head of a loop.
1088 void compute_loop_first_inst_sizes();
1089
1090 // Compute the information for the exception tables
1091 void FillExceptionTables(uint cnt, uint *call_returns, uint *inct_starts, Label *blk_labels);
1092
1093 // Stack slots that may be unused by the calling convention but must
1094 // otherwise be preserved. On Intel this includes the return address.
1095 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
1096 uint in_preserve_stack_slots();
1097
1098 // "Top of Stack" slots that may be unused by the calling convention but must
1099 // otherwise be preserved.
1100 // On Intel these are not necessary and the value can be zero.
1101 // On Sparc this describes the words reserved for storing a register window
1102 // when an interrupt occurs.
1103 static uint out_preserve_stack_slots();
1104
1105 // Number of outgoing stack slots killed above the out_preserve_stack_slots
1106 // for calls to C. Supports the var-args backing area for register parms.
1107 uint varargs_C_out_slots_killed() const;
1108
1109 // Number of Stack Slots consumed by a synchronization entry
1110 int sync_stack_slots() const;
1111
1112 // Compute the name of old_SP. See <arch>.ad for frame layout.
1113 OptoReg::Name compute_old_SP();
1114
1115 #ifdef ENABLE_ZAP_DEAD_LOCALS
1116 static bool is_node_getting_a_safepoint(Node*);
1117 void Insert_zap_nodes();
1118 Node* call_zap_node(MachSafePointNode* n, int block_no);
1119 #endif
1120
1121 private:
1122 // Phase control:
1123 void Init(int aliaslevel); // Prepare for a single compilation
1124 int Inline_Warm(); // Find more inlining work.
1125 void Finish_Warm(); // Give up on further inlines.
1126 void Optimize(); // Given a graph, optimize it
1127 void Code_Gen(); // Generate code from a graph
1128
1129 // Management of the AliasType table.
1130 void grow_alias_types();
1131 AliasCacheEntry* probe_alias_cache(const TypePtr* adr_type);
1132 const TypePtr *flatten_alias_type(const TypePtr* adr_type) const;
1133 AliasType* find_alias_type(const TypePtr* adr_type, bool no_create, ciField* field);
1134
1135 void verify_top(Node*) const PRODUCT_RETURN;
1136
1137 // Intrinsic setup.
1138 void register_library_intrinsics(); // initializer
1139 CallGenerator* make_vm_intrinsic(ciMethod* m, bool is_virtual); // constructor
1140 int intrinsic_insertion_index(ciMethod* m, bool is_virtual); // helper
1141 CallGenerator* find_intrinsic(ciMethod* m, bool is_virtual); // query fn
1142 void register_intrinsic(CallGenerator* cg); // update fn
1143
1144 #ifndef PRODUCT
1145 static juint _intrinsic_hist_count[vmIntrinsics::ID_LIMIT];
1146 static jubyte _intrinsic_hist_flags[vmIntrinsics::ID_LIMIT];
1147 #endif
1148 // Function calls made by the public function final_graph_reshaping.
1149 // No need to be made public as they are not called elsewhere.
1150 void final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc);
1151 void final_graph_reshaping_walk( Node_Stack &nstack, Node *root, Final_Reshape_Counts &frc );
1152 void eliminate_redundant_card_marks(Node* n);
1153
1154 public:
1155
1156 // Note: Histogram array size is about 1 Kb.
1157 enum { // flag bits:
1158 _intrinsic_worked = 1, // succeeded at least once
1159 _intrinsic_failed = 2, // tried it but it failed
1160 _intrinsic_disabled = 4, // was requested but disabled (e.g., -XX:-InlineUnsafeOps)
1161 _intrinsic_virtual = 8, // was seen in the virtual form (rare)
1162 _intrinsic_both = 16 // was seen in the non-virtual form (usual)
1163 };
1164 // Update histogram. Return boolean if this is a first-time occurrence.
1165 static bool gather_intrinsic_statistics(vmIntrinsics::ID id,
1166 bool is_virtual, int flags) PRODUCT_RETURN0;
1167 static void print_intrinsic_statistics() PRODUCT_RETURN;
1168
1169 // Graph verification code
1170 // Walk the node list, verifying that there is a one-to-one
1171 // correspondence between Use-Def edges and Def-Use edges
1172 // The option no_dead_code enables stronger checks that the
1173 // graph is strongly connected from root in both directions.
1174 void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN;
1175
1176 // Verify GC barrier patterns
1177 void verify_barriers() PRODUCT_RETURN;
1178
1179 // End-of-run dumps.
1180 static void print_statistics() PRODUCT_RETURN;
1181
1182 // Dump formatted assembly
1183 void dump_asm(int *pcs = NULL, uint pc_limit = 0) PRODUCT_RETURN;
1184 void dump_pc(int *pcs, int pc_limit, Node *n);
1185
1186 // Verify ADLC assumptions during startup
1187 static void adlc_verification() PRODUCT_RETURN;
1188
1189 // Definitions of pd methods
1190 static void pd_compiler2_init();
1191
1192 // Auxiliary method for randomized fuzzing/stressing
1193 static bool randomized_select(int count);
1194
1195 // enter a PreserveJVMState block
1196 void inc_preserve_jvm_state() {
1197 _preserve_jvm_state++;
1198 }
1199
1200 // exit a PreserveJVMState block
1201 void dec_preserve_jvm_state() {
1202 _preserve_jvm_state--;
1203 assert(_preserve_jvm_state >= 0, "_preserve_jvm_state shouldn't be negative");
1204 }
1205
1206 bool has_preserve_jvm_state() const {
1207 return _preserve_jvm_state > 0;
1208 }
1209 };
1210
1211 #endif // SHARE_VM_OPTO_COMPILE_HPP