Wed, 03 Jun 2015 14:22:57 +0200
8077504: Unsafe load can loose control dependency and cause crash
Summary: Node::depends_only_on_test() should return false for Unsafe loads
Reviewed-by: kvn, adinn
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.
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23 */
25 #ifndef SHARE_VM_OPTO_COMPILE_HPP
26 #define SHARE_VM_OPTO_COMPILE_HPP
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"
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;
87 //------------------------------Compile----------------------------------------
88 // This class defines a top-level Compiler invocation.
90 class Compile : public Phase {
91 friend class VMStructs;
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 };
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 };
116 // Information per category of alias (memory slice)
117 class AliasType {
118 private:
119 friend class Compile;
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
129 void Init(int i, const TypePtr* at);
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; }
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 }
154 void print_on(outputStream* st) PRODUCT_RETURN;
155 };
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 };
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.
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 }
198 bool operator==(const Constant& other);
200 BasicType type() const { return _type; }
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; }
207 Metadata* get_metadata() const { return _v._metadata; }
209 int offset() const { return _offset; }
210 void set_offset(int offset) { _offset = offset; }
212 float freq() const { return _freq; }
213 void inc_freq(float freq) { _freq += freq; }
215 bool can_be_reused() const { return _can_be_reused; }
216 };
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.
226 static int qsort_comparator(Constant* a, Constant* b);
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); }
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 {}
240 int size() const { assert(_size != -1, "not calculated yet"); return _size; }
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; }
246 void emit(CodeBuffer& cb);
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(); }
251 void calculate_offsets_and_size();
252 int find_offset(Constant& con) const;
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 }
267 // Jump-table
268 Constant add_jump_table(MachConstantNode* n);
269 void fill_jump_table(CodeBuffer& cb, MachConstantNode* n, GrowableArray<Label*> labels) const;
270 };
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
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 uintx _max_node_limit; // Max unique node count during a single compilation.
294 // For deopt
295 int _orig_pc_slot;
296 int _orig_pc_slot_offset_in_bytes;
298 int _major_progress; // Count of something big happening
299 bool _inlining_progress; // progress doing incremental inlining?
300 bool _inlining_incrementally;// Are we doing incremental inlining (post parse)
301 bool _has_loops; // True if the method _may_ have some loops
302 bool _has_split_ifs; // True if the method _may_ have some split-if
303 bool _has_unsafe_access; // True if the method _may_ produce faults in unsafe loads or stores.
304 bool _has_stringbuilder; // True StringBuffers or StringBuilders are allocated
305 bool _has_boxed_value; // True if a boxed object is allocated
306 int _max_vector_size; // Maximum size of generated vectors
307 uint _trap_hist[trapHistLength]; // Cumulative traps
308 bool _trap_can_recompile; // Have we emitted a recompiling trap?
309 uint _decompile_count; // Cumulative decompilation counts.
310 bool _do_inlining; // True if we intend to do inlining
311 bool _do_scheduling; // True if we intend to do scheduling
312 bool _do_freq_based_layout; // True if we intend to do frequency based block layout
313 bool _do_count_invocations; // True if we generate code to count invocations
314 bool _do_method_data_update; // True if we generate code to update MethodData*s
315 int _AliasLevel; // Locally-adjusted version of AliasLevel flag.
316 bool _print_assembly; // True if we should dump assembly code for this compilation
317 bool _print_inlining; // True if we should print inlining for this compilation
318 bool _print_intrinsics; // True if we should print intrinsics for this compilation
319 #ifndef PRODUCT
320 bool _trace_opto_output;
321 bool _parsed_irreducible_loop; // True if ciTypeFlow detected irreducible loops during parsing
322 #endif
323 bool _has_irreducible_loop; // Found irreducible loops
324 // JSR 292
325 bool _has_method_handle_invokes; // True if this method has MethodHandle invokes.
326 RTMState _rtm_state; // State of Restricted Transactional Memory usage
328 // Compilation environment.
329 Arena _comp_arena; // Arena with lifetime equivalent to Compile
330 ciEnv* _env; // CI interface
331 CompileLog* _log; // from CompilerThread
332 const char* _failure_reason; // for record_failure/failing pattern
333 GrowableArray<CallGenerator*>* _intrinsics; // List of intrinsics.
334 GrowableArray<Node*>* _macro_nodes; // List of nodes which need to be expanded before matching.
335 GrowableArray<Node*>* _predicate_opaqs; // List of Opaque1 nodes for the loop predicates.
336 GrowableArray<Node*>* _expensive_nodes; // List of nodes that are expensive to compute and that we'd better not let the GVN freely common
337 ConnectionGraph* _congraph;
338 #ifndef PRODUCT
339 IdealGraphPrinter* _printer;
340 #endif
343 // Node management
344 uint _unique; // Counter for unique Node indices
345 VectorSet _dead_node_list; // Set of dead nodes
346 uint _dead_node_count; // Number of dead nodes; VectorSet::Size() is O(N).
347 // So use this to keep count and make the call O(1).
348 debug_only(static int _debug_idx;) // Monotonic counter (not reset), use -XX:BreakAtNode=<idx>
349 Arena _node_arena; // Arena for new-space Nodes
350 Arena _old_arena; // Arena for old-space Nodes, lifetime during xform
351 RootNode* _root; // Unique root of compilation, or NULL after bail-out.
352 Node* _top; // Unique top node. (Reset by various phases.)
354 Node* _immutable_memory; // Initial memory state
356 Node* _recent_alloc_obj;
357 Node* _recent_alloc_ctl;
359 // Constant table
360 ConstantTable _constant_table; // The constant table for this compile.
361 MachConstantBaseNode* _mach_constant_base_node; // Constant table base node singleton.
364 // Blocked array of debugging and profiling information,
365 // tracked per node.
366 enum { _log2_node_notes_block_size = 8,
367 _node_notes_block_size = (1<<_log2_node_notes_block_size)
368 };
369 GrowableArray<Node_Notes*>* _node_note_array;
370 Node_Notes* _default_node_notes; // default notes for new nodes
372 // After parsing and every bulk phase we hang onto the Root instruction.
373 // The RootNode instruction is where the whole program begins. It produces
374 // the initial Control and BOTTOM for everybody else.
376 // Type management
377 Arena _Compile_types; // Arena for all types
378 Arena* _type_arena; // Alias for _Compile_types except in Initialize_shared()
379 Dict* _type_dict; // Intern table
380 void* _type_hwm; // Last allocation (see Type::operator new/delete)
381 size_t _type_last_size; // Last allocation size (see Type::operator new/delete)
382 ciMethod* _last_tf_m; // Cache for
383 const TypeFunc* _last_tf; // TypeFunc::make
384 AliasType** _alias_types; // List of alias types seen so far.
385 int _num_alias_types; // Logical length of _alias_types
386 int _max_alias_types; // Physical length of _alias_types
387 AliasCacheEntry _alias_cache[AliasCacheSize]; // Gets aliases w/o data structure walking
389 // Parsing, optimization
390 PhaseGVN* _initial_gvn; // Results of parse-time PhaseGVN
391 Unique_Node_List* _for_igvn; // Initial work-list for next round of Iterative GVN
392 WarmCallInfo* _warm_calls; // Sorted work-list for heat-based inlining.
394 GrowableArray<CallGenerator*> _late_inlines; // List of CallGenerators to be revisited after
395 // main parsing has finished.
396 GrowableArray<CallGenerator*> _string_late_inlines; // same but for string operations
398 GrowableArray<CallGenerator*> _boxing_late_inlines; // same but for boxing operations
400 int _late_inlines_pos; // Where in the queue should the next late inlining candidate go (emulate depth first inlining)
401 uint _number_of_mh_late_inlines; // number of method handle late inlining still pending
404 // Inlining may not happen in parse order which would make
405 // PrintInlining output confusing. Keep track of PrintInlining
406 // pieces in order.
407 class PrintInliningBuffer : public ResourceObj {
408 private:
409 CallGenerator* _cg;
410 stringStream* _ss;
412 public:
413 PrintInliningBuffer()
414 : _cg(NULL) { _ss = new stringStream(); }
416 stringStream* ss() const { return _ss; }
417 CallGenerator* cg() const { return _cg; }
418 void set_cg(CallGenerator* cg) { _cg = cg; }
419 };
421 GrowableArray<PrintInliningBuffer>* _print_inlining_list;
422 int _print_inlining_idx;
424 // Only keep nodes in the expensive node list that need to be optimized
425 void cleanup_expensive_nodes(PhaseIterGVN &igvn);
426 // Use for sorting expensive nodes to bring similar nodes together
427 static int cmp_expensive_nodes(Node** n1, Node** n2);
428 // Expensive nodes list already sorted?
429 bool expensive_nodes_sorted() const;
430 // Remove the speculative part of types and clean up the graph
431 void remove_speculative_types(PhaseIterGVN &igvn);
433 void* _replay_inline_data; // Pointer to data loaded from file
435 public:
437 outputStream* print_inlining_stream() const {
438 return _print_inlining_list->adr_at(_print_inlining_idx)->ss();
439 }
441 void print_inlining_skip(CallGenerator* cg) {
442 if (_print_inlining) {
443 _print_inlining_list->adr_at(_print_inlining_idx)->set_cg(cg);
444 _print_inlining_idx++;
445 _print_inlining_list->insert_before(_print_inlining_idx, PrintInliningBuffer());
446 }
447 }
449 void print_inlining_insert(CallGenerator* cg) {
450 if (_print_inlining) {
451 for (int i = 0; i < _print_inlining_list->length(); i++) {
452 if (_print_inlining_list->adr_at(i)->cg() == cg) {
453 _print_inlining_list->insert_before(i+1, PrintInliningBuffer());
454 _print_inlining_idx = i+1;
455 _print_inlining_list->adr_at(i)->set_cg(NULL);
456 return;
457 }
458 }
459 ShouldNotReachHere();
460 }
461 }
463 void print_inlining(ciMethod* method, int inline_level, int bci, const char* msg = NULL) {
464 stringStream ss;
465 CompileTask::print_inlining(&ss, method, inline_level, bci, msg);
466 print_inlining_stream()->print("%s", ss.as_string());
467 }
469 void* replay_inline_data() const { return _replay_inline_data; }
471 // Dump inlining replay data to the stream.
472 void dump_inline_data(outputStream* out);
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 Arena* _indexSet_arena; // control IndexSet allocation within PhaseChaitin
487 void* _indexSet_free_block_list; // free list of IndexSet bit blocks
488 int _interpreter_frame_size;
490 uint _node_bundling_limit;
491 Bundle* _node_bundling_base; // Information for instruction bundling
493 // Instruction bits passed off to the VM
494 int _method_size; // Size of nmethod code segment in bytes
495 CodeBuffer _code_buffer; // Where the code is assembled
496 int _first_block_size; // Size of unvalidated entry point code / OSR poison code
497 ExceptionHandlerTable _handler_table; // Table of native-code exception handlers
498 ImplicitExceptionTable _inc_table; // Table of implicit null checks in native code
499 OopMapSet* _oop_map_set; // Table of oop maps (one for each safepoint location)
500 static int _CompiledZap_count; // counter compared against CompileZap[First/Last]
501 BufferBlob* _scratch_buffer_blob; // For temporary code buffers.
502 relocInfo* _scratch_locs_memory; // For temporary code buffers.
503 int _scratch_const_size; // For temporary code buffers.
504 bool _in_scratch_emit_size; // true when in scratch_emit_size.
506 public:
507 // Accessors
509 // The Compile instance currently active in this (compiler) thread.
510 static Compile* current() {
511 return (Compile*) ciEnv::current()->compiler_data();
512 }
514 // ID for this compilation. Useful for setting breakpoints in the debugger.
515 int compile_id() const { return _compile_id; }
517 // Does this compilation allow instructions to subsume loads? User
518 // instructions that subsume a load may result in an unschedulable
519 // instruction sequence.
520 bool subsume_loads() const { return _subsume_loads; }
521 /** Do escape analysis. */
522 bool do_escape_analysis() const { return _do_escape_analysis; }
523 /** Do boxing elimination. */
524 bool eliminate_boxing() const { return _eliminate_boxing; }
525 /** Do aggressive boxing elimination. */
526 bool aggressive_unboxing() const { return _eliminate_boxing && AggressiveUnboxing; }
527 bool save_argument_registers() const { return _save_argument_registers; }
530 // Other fixed compilation parameters.
531 ciMethod* method() const { return _method; }
532 int entry_bci() const { return _entry_bci; }
533 bool is_osr_compilation() const { return _entry_bci != InvocationEntryBci; }
534 bool is_method_compilation() const { return (_method != NULL && !_method->flags().is_native()); }
535 const TypeFunc* tf() const { assert(_tf!=NULL, ""); return _tf; }
536 void init_tf(const TypeFunc* tf) { assert(_tf==NULL, ""); _tf = tf; }
537 InlineTree* ilt() const { return _ilt; }
538 address stub_function() const { return _stub_function; }
539 const char* stub_name() const { return _stub_name; }
540 address stub_entry_point() const { return _stub_entry_point; }
542 // Control of this compilation.
543 int fixed_slots() const { assert(_fixed_slots >= 0, ""); return _fixed_slots; }
544 void set_fixed_slots(int n) { _fixed_slots = n; }
545 int major_progress() const { return _major_progress; }
546 void set_inlining_progress(bool z) { _inlining_progress = z; }
547 int inlining_progress() const { return _inlining_progress; }
548 void set_inlining_incrementally(bool z) { _inlining_incrementally = z; }
549 int inlining_incrementally() const { return _inlining_incrementally; }
550 void set_major_progress() { _major_progress++; }
551 void clear_major_progress() { _major_progress = 0; }
552 int num_loop_opts() const { return _num_loop_opts; }
553 void set_num_loop_opts(int n) { _num_loop_opts = n; }
554 int max_inline_size() const { return _max_inline_size; }
555 void set_freq_inline_size(int n) { _freq_inline_size = n; }
556 int freq_inline_size() const { return _freq_inline_size; }
557 void set_max_inline_size(int n) { _max_inline_size = n; }
558 bool has_loops() const { return _has_loops; }
559 void set_has_loops(bool z) { _has_loops = z; }
560 bool has_split_ifs() const { return _has_split_ifs; }
561 void set_has_split_ifs(bool z) { _has_split_ifs = z; }
562 bool has_unsafe_access() const { return _has_unsafe_access; }
563 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; }
564 bool has_stringbuilder() const { return _has_stringbuilder; }
565 void set_has_stringbuilder(bool z) { _has_stringbuilder = z; }
566 bool has_boxed_value() const { return _has_boxed_value; }
567 void set_has_boxed_value(bool z) { _has_boxed_value = z; }
568 int max_vector_size() const { return _max_vector_size; }
569 void set_max_vector_size(int s) { _max_vector_size = s; }
570 void set_trap_count(uint r, uint c) { assert(r < trapHistLength, "oob"); _trap_hist[r] = c; }
571 uint trap_count(uint r) const { assert(r < trapHistLength, "oob"); return _trap_hist[r]; }
572 bool trap_can_recompile() const { return _trap_can_recompile; }
573 void set_trap_can_recompile(bool z) { _trap_can_recompile = z; }
574 uint decompile_count() const { return _decompile_count; }
575 void set_decompile_count(uint c) { _decompile_count = c; }
576 bool allow_range_check_smearing() const;
577 bool do_inlining() const { return _do_inlining; }
578 void set_do_inlining(bool z) { _do_inlining = z; }
579 bool do_scheduling() const { return _do_scheduling; }
580 void set_do_scheduling(bool z) { _do_scheduling = z; }
581 bool do_freq_based_layout() const{ return _do_freq_based_layout; }
582 void set_do_freq_based_layout(bool z){ _do_freq_based_layout = z; }
583 bool do_count_invocations() const{ return _do_count_invocations; }
584 void set_do_count_invocations(bool z){ _do_count_invocations = z; }
585 bool do_method_data_update() const { return _do_method_data_update; }
586 void set_do_method_data_update(bool z) { _do_method_data_update = 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 uint max_node_limit() const { return (uint)_max_node_limit; }
599 void set_max_node_limit(uint n) { _max_node_limit = n; }
601 // check the CompilerOracle for special behaviours for this compile
602 bool method_has_option(const char * option) {
603 return method() != NULL && method()->has_option(option);
604 }
605 template<typename T>
606 bool method_has_option_value(const char * option, T& value) {
607 return method() != NULL && method()->has_option_value(option, value);
608 }
609 #ifndef PRODUCT
610 bool trace_opto_output() const { return _trace_opto_output; }
611 bool parsed_irreducible_loop() const { return _parsed_irreducible_loop; }
612 void set_parsed_irreducible_loop(bool z) { _parsed_irreducible_loop = z; }
613 int _in_dump_cnt; // Required for dumping ir nodes.
614 #endif
615 bool has_irreducible_loop() const { return _has_irreducible_loop; }
616 void set_has_irreducible_loop(bool z) { _has_irreducible_loop = z; }
618 // JSR 292
619 bool has_method_handle_invokes() const { return _has_method_handle_invokes; }
620 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; }
622 Ticks _latest_stage_start_counter;
624 void begin_method() {
625 #ifndef PRODUCT
626 if (_printer) _printer->begin_method(this);
627 #endif
628 C->_latest_stage_start_counter.stamp();
629 }
631 void print_method(CompilerPhaseType cpt, int level = 1) {
632 EventCompilerPhase event;
633 if (event.should_commit()) {
634 event.set_starttime(C->_latest_stage_start_counter);
635 event.set_phase((u1) cpt);
636 event.set_compileID(C->_compile_id);
637 event.set_phaseLevel(level);
638 event.commit();
639 }
642 #ifndef PRODUCT
643 if (_printer) _printer->print_method(this, CompilerPhaseTypeHelper::to_string(cpt), level);
644 #endif
645 C->_latest_stage_start_counter.stamp();
646 }
648 void end_method(int level = 1) {
649 EventCompilerPhase event;
650 if (event.should_commit()) {
651 event.set_starttime(C->_latest_stage_start_counter);
652 event.set_phase((u1) PHASE_END);
653 event.set_compileID(C->_compile_id);
654 event.set_phaseLevel(level);
655 event.commit();
656 }
657 #ifndef PRODUCT
658 if (_printer) _printer->end_method();
659 #endif
660 }
662 int macro_count() const { return _macro_nodes->length(); }
663 int predicate_count() const { return _predicate_opaqs->length();}
664 int expensive_count() const { return _expensive_nodes->length(); }
665 Node* macro_node(int idx) const { return _macro_nodes->at(idx); }
666 Node* predicate_opaque1_node(int idx) const { return _predicate_opaqs->at(idx);}
667 Node* expensive_node(int idx) const { return _expensive_nodes->at(idx); }
668 ConnectionGraph* congraph() { return _congraph;}
669 void set_congraph(ConnectionGraph* congraph) { _congraph = congraph;}
670 void add_macro_node(Node * n) {
671 //assert(n->is_macro(), "must be a macro node");
672 assert(!_macro_nodes->contains(n), " duplicate entry in expand list");
673 _macro_nodes->append(n);
674 }
675 void remove_macro_node(Node * n) {
676 // this function may be called twice for a node so check
677 // that the node is in the array before attempting to remove it
678 if (_macro_nodes->contains(n))
679 _macro_nodes->remove(n);
680 // remove from _predicate_opaqs list also if it is there
681 if (predicate_count() > 0 && _predicate_opaqs->contains(n)){
682 _predicate_opaqs->remove(n);
683 }
684 }
685 void add_expensive_node(Node * n);
686 void remove_expensive_node(Node * n) {
687 if (_expensive_nodes->contains(n)) {
688 _expensive_nodes->remove(n);
689 }
690 }
691 void add_predicate_opaq(Node * n) {
692 assert(!_predicate_opaqs->contains(n), " duplicate entry in predicate opaque1");
693 assert(_macro_nodes->contains(n), "should have already been in macro list");
694 _predicate_opaqs->append(n);
695 }
696 // remove the opaque nodes that protect the predicates so that the unused checks and
697 // uncommon traps will be eliminated from the graph.
698 void cleanup_loop_predicates(PhaseIterGVN &igvn);
699 bool is_predicate_opaq(Node * n) {
700 return _predicate_opaqs->contains(n);
701 }
703 // Are there candidate expensive nodes for optimization?
704 bool should_optimize_expensive_nodes(PhaseIterGVN &igvn);
705 // Check whether n1 and n2 are similar
706 static int cmp_expensive_nodes(Node* n1, Node* n2);
707 // Sort expensive nodes to locate similar expensive nodes
708 void sort_expensive_nodes();
710 // Compilation environment.
711 Arena* comp_arena() { return &_comp_arena; }
712 ciEnv* env() const { return _env; }
713 CompileLog* log() const { return _log; }
714 bool failing() const { return _env->failing() || _failure_reason != NULL; }
715 const char* failure_reason() { return _failure_reason; }
716 bool failure_reason_is(const char* r) { return (r==_failure_reason) || (r!=NULL && _failure_reason!=NULL && strcmp(r, _failure_reason)==0); }
718 void record_failure(const char* reason);
719 void record_method_not_compilable(const char* reason, bool all_tiers = false) {
720 // All bailouts cover "all_tiers" when TieredCompilation is off.
721 if (!TieredCompilation) all_tiers = true;
722 env()->record_method_not_compilable(reason, all_tiers);
723 // Record failure reason.
724 record_failure(reason);
725 }
726 void record_method_not_compilable_all_tiers(const char* reason) {
727 record_method_not_compilable(reason, true);
728 }
729 bool check_node_count(uint margin, const char* reason) {
730 if (live_nodes() + margin > max_node_limit()) {
731 record_method_not_compilable(reason);
732 return true;
733 } else {
734 return false;
735 }
736 }
738 // Node management
739 uint unique() const { return _unique; }
740 uint next_unique() { return _unique++; }
741 void set_unique(uint i) { _unique = i; }
742 static int debug_idx() { return debug_only(_debug_idx)+0; }
743 static void set_debug_idx(int i) { debug_only(_debug_idx = i); }
744 Arena* node_arena() { return &_node_arena; }
745 Arena* old_arena() { return &_old_arena; }
746 RootNode* root() const { return _root; }
747 void set_root(RootNode* r) { _root = r; }
748 StartNode* start() const; // (Derived from root.)
749 void init_start(StartNode* s);
750 Node* immutable_memory();
752 Node* recent_alloc_ctl() const { return _recent_alloc_ctl; }
753 Node* recent_alloc_obj() const { return _recent_alloc_obj; }
754 void set_recent_alloc(Node* ctl, Node* obj) {
755 _recent_alloc_ctl = ctl;
756 _recent_alloc_obj = obj;
757 }
758 void record_dead_node(uint idx) { if (_dead_node_list.test_set(idx)) return;
759 _dead_node_count++;
760 }
761 bool is_dead_node(uint idx) { return _dead_node_list.test(idx) != 0; }
762 uint dead_node_count() { return _dead_node_count; }
763 void reset_dead_node_list() { _dead_node_list.Reset();
764 _dead_node_count = 0;
765 }
766 uint live_nodes() const {
767 int val = _unique - _dead_node_count;
768 assert (val >= 0, err_msg_res("number of tracked dead nodes %d more than created nodes %d", _unique, _dead_node_count));
769 return (uint) val;
770 }
771 #ifdef ASSERT
772 uint count_live_nodes_by_graph_walk();
773 void print_missing_nodes();
774 #endif
776 // Constant table
777 ConstantTable& constant_table() { return _constant_table; }
779 MachConstantBaseNode* mach_constant_base_node();
780 bool has_mach_constant_base_node() const { return _mach_constant_base_node != NULL; }
781 // Generated by adlc, true if CallNode requires MachConstantBase.
782 bool needs_clone_jvms();
784 // Handy undefined Node
785 Node* top() const { return _top; }
787 // these are used by guys who need to know about creation and transformation of top:
788 Node* cached_top_node() { return _top; }
789 void set_cached_top_node(Node* tn);
791 GrowableArray<Node_Notes*>* node_note_array() const { return _node_note_array; }
792 void set_node_note_array(GrowableArray<Node_Notes*>* arr) { _node_note_array = arr; }
793 Node_Notes* default_node_notes() const { return _default_node_notes; }
794 void set_default_node_notes(Node_Notes* n) { _default_node_notes = n; }
796 Node_Notes* node_notes_at(int idx) {
797 return locate_node_notes(_node_note_array, idx, false);
798 }
799 inline bool set_node_notes_at(int idx, Node_Notes* value);
801 // Copy notes from source to dest, if they exist.
802 // Overwrite dest only if source provides something.
803 // Return true if information was moved.
804 bool copy_node_notes_to(Node* dest, Node* source);
806 // Workhorse function to sort out the blocked Node_Notes array:
807 inline Node_Notes* locate_node_notes(GrowableArray<Node_Notes*>* arr,
808 int idx, bool can_grow = false);
810 void grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by);
812 // Type management
813 Arena* type_arena() { return _type_arena; }
814 Dict* type_dict() { return _type_dict; }
815 void* type_hwm() { return _type_hwm; }
816 size_t type_last_size() { return _type_last_size; }
817 int num_alias_types() { return _num_alias_types; }
819 void init_type_arena() { _type_arena = &_Compile_types; }
820 void set_type_arena(Arena* a) { _type_arena = a; }
821 void set_type_dict(Dict* d) { _type_dict = d; }
822 void set_type_hwm(void* p) { _type_hwm = p; }
823 void set_type_last_size(size_t sz) { _type_last_size = sz; }
825 const TypeFunc* last_tf(ciMethod* m) {
826 return (m == _last_tf_m) ? _last_tf : NULL;
827 }
828 void set_last_tf(ciMethod* m, const TypeFunc* tf) {
829 assert(m != NULL || tf == NULL, "");
830 _last_tf_m = m;
831 _last_tf = tf;
832 }
834 AliasType* alias_type(int idx) { assert(idx < num_alias_types(), "oob"); return _alias_types[idx]; }
835 AliasType* alias_type(const TypePtr* adr_type, ciField* field = NULL) { return find_alias_type(adr_type, false, field); }
836 bool have_alias_type(const TypePtr* adr_type);
837 AliasType* alias_type(ciField* field);
839 int get_alias_index(const TypePtr* at) { return alias_type(at)->index(); }
840 const TypePtr* get_adr_type(uint aidx) { return alias_type(aidx)->adr_type(); }
841 int get_general_index(uint aidx) { return alias_type(aidx)->general_index(); }
843 // Building nodes
844 void rethrow_exceptions(JVMState* jvms);
845 void return_values(JVMState* jvms);
846 JVMState* build_start_state(StartNode* start, const TypeFunc* tf);
848 // Decide how to build a call.
849 // The profile factor is a discount to apply to this site's interp. profile.
850 CallGenerator* call_generator(ciMethod* call_method, int vtable_index, bool call_does_dispatch,
851 JVMState* jvms, bool allow_inline, float profile_factor, ciKlass* speculative_receiver_type = NULL,
852 bool allow_intrinsics = true, bool delayed_forbidden = false);
853 bool should_delay_inlining(ciMethod* call_method, JVMState* jvms) {
854 return should_delay_string_inlining(call_method, jvms) ||
855 should_delay_boxing_inlining(call_method, jvms);
856 }
857 bool should_delay_string_inlining(ciMethod* call_method, JVMState* jvms);
858 bool should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms);
860 // Helper functions to identify inlining potential at call-site
861 ciMethod* optimize_virtual_call(ciMethod* caller, int bci, ciInstanceKlass* klass,
862 ciKlass* holder, ciMethod* callee,
863 const TypeOopPtr* receiver_type, bool is_virtual,
864 bool &call_does_dispatch, int &vtable_index,
865 bool check_access = true);
866 ciMethod* optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass,
867 ciMethod* callee, const TypeOopPtr* receiver_type,
868 bool check_access = true);
870 // Report if there were too many traps at a current method and bci.
871 // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded.
872 // If there is no MDO at all, report no trap unless told to assume it.
873 bool too_many_traps(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
874 // This version, unspecific to a particular bci, asks if
875 // PerMethodTrapLimit was exceeded for all inlined methods seen so far.
876 bool too_many_traps(Deoptimization::DeoptReason reason,
877 // Privately used parameter for logging:
878 ciMethodData* logmd = NULL);
879 // Report if there were too many recompiles at a method and bci.
880 bool too_many_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
881 // Return a bitset with the reasons where deoptimization is allowed,
882 // i.e., where there were not too many uncommon traps.
883 int _allowed_reasons;
884 int allowed_deopt_reasons() { return _allowed_reasons; }
885 void set_allowed_deopt_reasons();
887 // Parsing, optimization
888 PhaseGVN* initial_gvn() { return _initial_gvn; }
889 Unique_Node_List* for_igvn() { return _for_igvn; }
890 inline void record_for_igvn(Node* n); // Body is after class Unique_Node_List.
891 void set_initial_gvn(PhaseGVN *gvn) { _initial_gvn = gvn; }
892 void set_for_igvn(Unique_Node_List *for_igvn) { _for_igvn = for_igvn; }
894 // Replace n by nn using initial_gvn, calling hash_delete and
895 // record_for_igvn as needed.
896 void gvn_replace_by(Node* n, Node* nn);
899 void identify_useful_nodes(Unique_Node_List &useful);
900 void update_dead_node_list(Unique_Node_List &useful);
901 void remove_useless_nodes (Unique_Node_List &useful);
903 WarmCallInfo* warm_calls() const { return _warm_calls; }
904 void set_warm_calls(WarmCallInfo* l) { _warm_calls = l; }
905 WarmCallInfo* pop_warm_call();
907 // Record this CallGenerator for inlining at the end of parsing.
908 void add_late_inline(CallGenerator* cg) {
909 _late_inlines.insert_before(_late_inlines_pos, cg);
910 _late_inlines_pos++;
911 }
913 void prepend_late_inline(CallGenerator* cg) {
914 _late_inlines.insert_before(0, cg);
915 }
917 void add_string_late_inline(CallGenerator* cg) {
918 _string_late_inlines.push(cg);
919 }
921 void add_boxing_late_inline(CallGenerator* cg) {
922 _boxing_late_inlines.push(cg);
923 }
925 void remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful);
927 void dump_inlining();
929 bool over_inlining_cutoff() const {
930 if (!inlining_incrementally()) {
931 return unique() > (uint)NodeCountInliningCutoff;
932 } else {
933 return live_nodes() > (uint)LiveNodeCountInliningCutoff;
934 }
935 }
937 void inc_number_of_mh_late_inlines() { _number_of_mh_late_inlines++; }
938 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--; }
939 bool has_mh_late_inlines() const { return _number_of_mh_late_inlines > 0; }
941 void inline_incrementally_one(PhaseIterGVN& igvn);
942 void inline_incrementally(PhaseIterGVN& igvn);
943 void inline_string_calls(bool parse_time);
944 void inline_boxing_calls(PhaseIterGVN& igvn);
946 // Matching, CFG layout, allocation, code generation
947 PhaseCFG* cfg() { return _cfg; }
948 bool select_24_bit_instr() const { return _select_24_bit_instr; }
949 bool in_24_bit_fp_mode() const { return _in_24_bit_fp_mode; }
950 bool has_java_calls() const { return _java_calls > 0; }
951 int java_calls() const { return _java_calls; }
952 int inner_loops() const { return _inner_loops; }
953 Matcher* matcher() { return _matcher; }
954 PhaseRegAlloc* regalloc() { return _regalloc; }
955 int frame_slots() const { return _frame_slots; }
956 int frame_size_in_words() const; // frame_slots in units of the polymorphic 'words'
957 int frame_size_in_bytes() const { return _frame_slots << LogBytesPerInt; }
958 RegMask& FIRST_STACK_mask() { return _FIRST_STACK_mask; }
959 Arena* indexSet_arena() { return _indexSet_arena; }
960 void* indexSet_free_block_list() { return _indexSet_free_block_list; }
961 uint node_bundling_limit() { return _node_bundling_limit; }
962 Bundle* node_bundling_base() { return _node_bundling_base; }
963 void set_node_bundling_limit(uint n) { _node_bundling_limit = n; }
964 void set_node_bundling_base(Bundle* b) { _node_bundling_base = b; }
965 bool starts_bundle(const Node *n) const;
966 bool need_stack_bang(int frame_size_in_bytes) const;
967 bool need_register_stack_bang() const;
969 void update_interpreter_frame_size(int size) {
970 if (_interpreter_frame_size < size) {
971 _interpreter_frame_size = size;
972 }
973 }
974 int bang_size_in_bytes() const;
976 void set_matcher(Matcher* m) { _matcher = m; }
977 //void set_regalloc(PhaseRegAlloc* ra) { _regalloc = ra; }
978 void set_indexSet_arena(Arena* a) { _indexSet_arena = a; }
979 void set_indexSet_free_block_list(void* p) { _indexSet_free_block_list = p; }
981 // Remember if this compilation changes hardware mode to 24-bit precision
982 void set_24_bit_selection_and_mode(bool selection, bool mode) {
983 _select_24_bit_instr = selection;
984 _in_24_bit_fp_mode = mode;
985 }
987 void set_java_calls(int z) { _java_calls = z; }
988 void set_inner_loops(int z) { _inner_loops = z; }
990 // Instruction bits passed off to the VM
991 int code_size() { return _method_size; }
992 CodeBuffer* code_buffer() { return &_code_buffer; }
993 int first_block_size() { return _first_block_size; }
994 void set_frame_complete(int off) { _code_offsets.set_value(CodeOffsets::Frame_Complete, off); }
995 ExceptionHandlerTable* handler_table() { return &_handler_table; }
996 ImplicitExceptionTable* inc_table() { return &_inc_table; }
997 OopMapSet* oop_map_set() { return _oop_map_set; }
998 DebugInformationRecorder* debug_info() { return env()->debug_info(); }
999 Dependencies* dependencies() { return env()->dependencies(); }
1000 static int CompiledZap_count() { return _CompiledZap_count; }
1001 BufferBlob* scratch_buffer_blob() { return _scratch_buffer_blob; }
1002 void init_scratch_buffer_blob(int const_size);
1003 void clear_scratch_buffer_blob();
1004 void set_scratch_buffer_blob(BufferBlob* b) { _scratch_buffer_blob = b; }
1005 relocInfo* scratch_locs_memory() { return _scratch_locs_memory; }
1006 void set_scratch_locs_memory(relocInfo* b) { _scratch_locs_memory = b; }
1008 // emit to scratch blob, report resulting size
1009 uint scratch_emit_size(const Node* n);
1010 void set_in_scratch_emit_size(bool x) { _in_scratch_emit_size = x; }
1011 bool in_scratch_emit_size() const { return _in_scratch_emit_size; }
1013 enum ScratchBufferBlob {
1014 MAX_inst_size = 1024,
1015 MAX_locs_size = 128, // number of relocInfo elements
1016 MAX_const_size = 128,
1017 MAX_stubs_size = 128
1018 };
1020 // Major entry point. Given a Scope, compile the associated method.
1021 // For normal compilations, entry_bci is InvocationEntryBci. For on stack
1022 // replacement, entry_bci indicates the bytecode for which to compile a
1023 // continuation.
1024 Compile(ciEnv* ci_env, C2Compiler* compiler, ciMethod* target,
1025 int entry_bci, bool subsume_loads, bool do_escape_analysis,
1026 bool eliminate_boxing);
1028 // Second major entry point. From the TypeFunc signature, generate code
1029 // to pass arguments from the Java calling convention to the C calling
1030 // convention.
1031 Compile(ciEnv* ci_env, const TypeFunc *(*gen)(),
1032 address stub_function, const char *stub_name,
1033 int is_fancy_jump, bool pass_tls,
1034 bool save_arg_registers, bool return_pc);
1036 // From the TypeFunc signature, generate code to pass arguments
1037 // from Compiled calling convention to Interpreter's calling convention
1038 void Generate_Compiled_To_Interpreter_Graph(const TypeFunc *tf, address interpreter_entry);
1040 // From the TypeFunc signature, generate code to pass arguments
1041 // from Interpreter's calling convention to Compiler's calling convention
1042 void Generate_Interpreter_To_Compiled_Graph(const TypeFunc *tf);
1044 // Are we compiling a method?
1045 bool has_method() { return method() != NULL; }
1047 // Maybe print some information about this compile.
1048 void print_compile_messages();
1050 // Final graph reshaping, a post-pass after the regular optimizer is done.
1051 bool final_graph_reshaping();
1053 // returns true if adr is completely contained in the given alias category
1054 bool must_alias(const TypePtr* adr, int alias_idx);
1056 // returns true if adr overlaps with the given alias category
1057 bool can_alias(const TypePtr* adr, int alias_idx);
1059 // Driver for converting compiler's IR into machine code bits
1060 void Output();
1062 // Accessors for node bundling info.
1063 Bundle* node_bundling(const Node *n);
1064 bool valid_bundle_info(const Node *n);
1066 // Schedule and Bundle the instructions
1067 void ScheduleAndBundle();
1069 // Build OopMaps for each GC point
1070 void BuildOopMaps();
1072 // Append debug info for the node "local" at safepoint node "sfpt" to the
1073 // "array", May also consult and add to "objs", which describes the
1074 // scalar-replaced objects.
1075 void FillLocArray( int idx, MachSafePointNode* sfpt,
1076 Node *local, GrowableArray<ScopeValue*> *array,
1077 GrowableArray<ScopeValue*> *objs );
1079 // If "objs" contains an ObjectValue whose id is "id", returns it, else NULL.
1080 static ObjectValue* sv_for_node_id(GrowableArray<ScopeValue*> *objs, int id);
1081 // Requres that "objs" does not contains an ObjectValue whose id matches
1082 // that of "sv. Appends "sv".
1083 static void set_sv_for_object_node(GrowableArray<ScopeValue*> *objs,
1084 ObjectValue* sv );
1086 // Process an OopMap Element while emitting nodes
1087 void Process_OopMap_Node(MachNode *mach, int code_offset);
1089 // Initialize code buffer
1090 CodeBuffer* init_buffer(uint* blk_starts);
1092 // Write out basic block data to code buffer
1093 void fill_buffer(CodeBuffer* cb, uint* blk_starts);
1095 // Determine which variable sized branches can be shortened
1096 void shorten_branches(uint* blk_starts, int& code_size, int& reloc_size, int& stub_size);
1098 // Compute the size of first NumberOfLoopInstrToAlign instructions
1099 // at the head of a loop.
1100 void compute_loop_first_inst_sizes();
1102 // Compute the information for the exception tables
1103 void FillExceptionTables(uint cnt, uint *call_returns, uint *inct_starts, Label *blk_labels);
1105 // Stack slots that may be unused by the calling convention but must
1106 // otherwise be preserved. On Intel this includes the return address.
1107 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
1108 uint in_preserve_stack_slots();
1110 // "Top of Stack" slots that may be unused by the calling convention but must
1111 // otherwise be preserved.
1112 // On Intel these are not necessary and the value can be zero.
1113 // On Sparc this describes the words reserved for storing a register window
1114 // when an interrupt occurs.
1115 static uint out_preserve_stack_slots();
1117 // Number of outgoing stack slots killed above the out_preserve_stack_slots
1118 // for calls to C. Supports the var-args backing area for register parms.
1119 uint varargs_C_out_slots_killed() const;
1121 // Number of Stack Slots consumed by a synchronization entry
1122 int sync_stack_slots() const;
1124 // Compute the name of old_SP. See <arch>.ad for frame layout.
1125 OptoReg::Name compute_old_SP();
1127 #ifdef ENABLE_ZAP_DEAD_LOCALS
1128 static bool is_node_getting_a_safepoint(Node*);
1129 void Insert_zap_nodes();
1130 Node* call_zap_node(MachSafePointNode* n, int block_no);
1131 #endif
1133 private:
1134 // Phase control:
1135 void Init(int aliaslevel); // Prepare for a single compilation
1136 int Inline_Warm(); // Find more inlining work.
1137 void Finish_Warm(); // Give up on further inlines.
1138 void Optimize(); // Given a graph, optimize it
1139 void Code_Gen(); // Generate code from a graph
1141 // Management of the AliasType table.
1142 void grow_alias_types();
1143 AliasCacheEntry* probe_alias_cache(const TypePtr* adr_type);
1144 const TypePtr *flatten_alias_type(const TypePtr* adr_type) const;
1145 AliasType* find_alias_type(const TypePtr* adr_type, bool no_create, ciField* field);
1147 void verify_top(Node*) const PRODUCT_RETURN;
1149 // Intrinsic setup.
1150 void register_library_intrinsics(); // initializer
1151 CallGenerator* make_vm_intrinsic(ciMethod* m, bool is_virtual); // constructor
1152 int intrinsic_insertion_index(ciMethod* m, bool is_virtual); // helper
1153 CallGenerator* find_intrinsic(ciMethod* m, bool is_virtual); // query fn
1154 void register_intrinsic(CallGenerator* cg); // update fn
1156 #ifndef PRODUCT
1157 static juint _intrinsic_hist_count[vmIntrinsics::ID_LIMIT];
1158 static jubyte _intrinsic_hist_flags[vmIntrinsics::ID_LIMIT];
1159 #endif
1160 // Function calls made by the public function final_graph_reshaping.
1161 // No need to be made public as they are not called elsewhere.
1162 void final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &frc);
1163 void final_graph_reshaping_walk( Node_Stack &nstack, Node *root, Final_Reshape_Counts &frc );
1164 void eliminate_redundant_card_marks(Node* n);
1166 public:
1168 // Note: Histogram array size is about 1 Kb.
1169 enum { // flag bits:
1170 _intrinsic_worked = 1, // succeeded at least once
1171 _intrinsic_failed = 2, // tried it but it failed
1172 _intrinsic_disabled = 4, // was requested but disabled (e.g., -XX:-InlineUnsafeOps)
1173 _intrinsic_virtual = 8, // was seen in the virtual form (rare)
1174 _intrinsic_both = 16 // was seen in the non-virtual form (usual)
1175 };
1176 // Update histogram. Return boolean if this is a first-time occurrence.
1177 static bool gather_intrinsic_statistics(vmIntrinsics::ID id,
1178 bool is_virtual, int flags) PRODUCT_RETURN0;
1179 static void print_intrinsic_statistics() PRODUCT_RETURN;
1181 // Graph verification code
1182 // Walk the node list, verifying that there is a one-to-one
1183 // correspondence between Use-Def edges and Def-Use edges
1184 // The option no_dead_code enables stronger checks that the
1185 // graph is strongly connected from root in both directions.
1186 void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN;
1188 // Verify GC barrier patterns
1189 void verify_barriers() PRODUCT_RETURN;
1191 // End-of-run dumps.
1192 static void print_statistics() PRODUCT_RETURN;
1194 // Dump formatted assembly
1195 void dump_asm(int *pcs = NULL, uint pc_limit = 0) PRODUCT_RETURN;
1196 void dump_pc(int *pcs, int pc_limit, Node *n);
1198 // Verify ADLC assumptions during startup
1199 static void adlc_verification() PRODUCT_RETURN;
1201 // Definitions of pd methods
1202 static void pd_compiler2_init();
1204 // Auxiliary method for randomized fuzzing/stressing
1205 static bool randomized_select(int count);
1206 };
1208 #endif // SHARE_VM_OPTO_COMPILE_HPP