Mercurial > hg > graal-jvmci-8
annotate src/share/vm/opto/compile.hpp @ 368:36ccc817fca4
6747051: Improve code and implicit null check generation for compressed oops
Summary: Push DecodeN node below the Null check to the non-null path to use the mach node without 0 test.
Reviewed-by: rasbold, never
author | kvn |
---|---|
date | Tue, 23 Sep 2008 12:29:06 -0700 |
parents | 194b8e3a2fc4 |
children | 72c5366e5d86 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 class Block; | |
26 class Bundle; | |
27 class C2Compiler; | |
28 class CallGenerator; | |
29 class ConnectionGraph; | |
30 class InlineTree; | |
31 class Int_Array; | |
32 class Matcher; | |
33 class MachNode; | |
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34 class MachSafePointNode; |
0 | 35 class Node; |
36 class Node_Array; | |
37 class Node_Notes; | |
38 class OptoReg; | |
39 class PhaseCFG; | |
40 class PhaseGVN; | |
41 class PhaseRegAlloc; | |
42 class PhaseCCP; | |
43 class PhaseCCP_DCE; | |
44 class RootNode; | |
45 class relocInfo; | |
46 class Scope; | |
47 class StartNode; | |
48 class SafePointNode; | |
49 class JVMState; | |
50 class TypeData; | |
51 class TypePtr; | |
52 class TypeFunc; | |
53 class Unique_Node_List; | |
54 class nmethod; | |
55 class WarmCallInfo; | |
56 | |
57 //------------------------------Compile---------------------------------------- | |
58 // This class defines a top-level Compiler invocation. | |
59 | |
60 class Compile : public Phase { | |
61 public: | |
62 // Fixed alias indexes. (See also MergeMemNode.) | |
63 enum { | |
64 AliasIdxTop = 1, // pseudo-index, aliases to nothing (used as sentinel value) | |
65 AliasIdxBot = 2, // pseudo-index, aliases to everything | |
66 AliasIdxRaw = 3 // hard-wired index for TypeRawPtr::BOTTOM | |
67 }; | |
68 | |
69 // Variant of TraceTime(NULL, &_t_accumulator, TimeCompiler); | |
70 // Integrated with logging. If logging is turned on, and dolog is true, | |
71 // then brackets are put into the log, with time stamps and node counts. | |
72 // (The time collection itself is always conditionalized on TimeCompiler.) | |
73 class TracePhase : public TraceTime { | |
74 private: | |
75 Compile* C; | |
76 CompileLog* _log; | |
77 public: | |
78 TracePhase(const char* name, elapsedTimer* accumulator, bool dolog); | |
79 ~TracePhase(); | |
80 }; | |
81 | |
82 // Information per category of alias (memory slice) | |
83 class AliasType { | |
84 private: | |
85 friend class Compile; | |
86 | |
87 int _index; // unique index, used with MergeMemNode | |
88 const TypePtr* _adr_type; // normalized address type | |
89 ciField* _field; // relevant instance field, or null if none | |
90 bool _is_rewritable; // false if the memory is write-once only | |
91 int _general_index; // if this is type is an instance, the general | |
92 // type that this is an instance of | |
93 | |
94 void Init(int i, const TypePtr* at); | |
95 | |
96 public: | |
97 int index() const { return _index; } | |
98 const TypePtr* adr_type() const { return _adr_type; } | |
99 ciField* field() const { return _field; } | |
100 bool is_rewritable() const { return _is_rewritable; } | |
101 bool is_volatile() const { return (_field ? _field->is_volatile() : false); } | |
102 int general_index() const { return (_general_index != 0) ? _general_index : _index; } | |
103 | |
104 void set_rewritable(bool z) { _is_rewritable = z; } | |
105 void set_field(ciField* f) { | |
106 assert(!_field,""); | |
107 _field = f; | |
108 if (f->is_final()) _is_rewritable = false; | |
109 } | |
110 | |
111 void print_on(outputStream* st) PRODUCT_RETURN; | |
112 }; | |
113 | |
114 enum { | |
115 logAliasCacheSize = 6, | |
116 AliasCacheSize = (1<<logAliasCacheSize) | |
117 }; | |
118 struct AliasCacheEntry { const TypePtr* _adr_type; int _index; }; // simple duple type | |
119 enum { | |
120 trapHistLength = methodDataOopDesc::_trap_hist_limit | |
121 }; | |
122 | |
123 private: | |
124 // Fixed parameters to this compilation. | |
125 const int _compile_id; | |
126 const bool _save_argument_registers; // save/restore arg regs for trampolines | |
127 const bool _subsume_loads; // Load can be matched as part of a larger op. | |
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128 const bool _do_escape_analysis; // Do escape analysis. |
0 | 129 ciMethod* _method; // The method being compiled. |
130 int _entry_bci; // entry bci for osr methods. | |
131 const TypeFunc* _tf; // My kind of signature | |
132 InlineTree* _ilt; // Ditto (temporary). | |
133 address _stub_function; // VM entry for stub being compiled, or NULL | |
134 const char* _stub_name; // Name of stub or adapter being compiled, or NULL | |
135 address _stub_entry_point; // Compile code entry for generated stub, or NULL | |
136 | |
137 // Control of this compilation. | |
138 int _num_loop_opts; // Number of iterations for doing loop optimiztions | |
139 int _max_inline_size; // Max inline size for this compilation | |
140 int _freq_inline_size; // Max hot method inline size for this compilation | |
141 int _fixed_slots; // count of frame slots not allocated by the register | |
142 // allocator i.e. locks, original deopt pc, etc. | |
143 // For deopt | |
144 int _orig_pc_slot; | |
145 int _orig_pc_slot_offset_in_bytes; | |
146 | |
147 int _major_progress; // Count of something big happening | |
148 bool _deopt_happens; // TRUE if de-optimization CAN happen | |
149 bool _has_loops; // True if the method _may_ have some loops | |
150 bool _has_split_ifs; // True if the method _may_ have some split-if | |
151 bool _has_unsafe_access; // True if the method _may_ produce faults in unsafe loads or stores. | |
152 uint _trap_hist[trapHistLength]; // Cumulative traps | |
153 bool _trap_can_recompile; // Have we emitted a recompiling trap? | |
154 uint _decompile_count; // Cumulative decompilation counts. | |
155 bool _do_inlining; // True if we intend to do inlining | |
156 bool _do_scheduling; // True if we intend to do scheduling | |
157 bool _do_count_invocations; // True if we generate code to count invocations | |
158 bool _do_method_data_update; // True if we generate code to update methodDataOops | |
159 int _AliasLevel; // Locally-adjusted version of AliasLevel flag. | |
160 bool _print_assembly; // True if we should dump assembly code for this compilation | |
161 #ifndef PRODUCT | |
162 bool _trace_opto_output; | |
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163 bool _parsed_irreducible_loop; // True if ciTypeFlow detected irreducible loops during parsing |
0 | 164 #endif |
165 | |
166 // Compilation environment. | |
167 Arena _comp_arena; // Arena with lifetime equivalent to Compile | |
168 ciEnv* _env; // CI interface | |
169 CompileLog* _log; // from CompilerThread | |
170 const char* _failure_reason; // for record_failure/failing pattern | |
171 GrowableArray<CallGenerator*>* _intrinsics; // List of intrinsics. | |
172 GrowableArray<Node*>* _macro_nodes; // List of nodes which need to be expanded before matching. | |
173 ConnectionGraph* _congraph; | |
174 #ifndef PRODUCT | |
175 IdealGraphPrinter* _printer; | |
176 #endif | |
177 | |
178 // Node management | |
179 uint _unique; // Counter for unique Node indices | |
180 debug_only(static int _debug_idx;) // Monotonic counter (not reset), use -XX:BreakAtNode=<idx> | |
181 Arena _node_arena; // Arena for new-space Nodes | |
182 Arena _old_arena; // Arena for old-space Nodes, lifetime during xform | |
183 RootNode* _root; // Unique root of compilation, or NULL after bail-out. | |
184 Node* _top; // Unique top node. (Reset by various phases.) | |
185 | |
186 Node* _immutable_memory; // Initial memory state | |
187 | |
188 Node* _recent_alloc_obj; | |
189 Node* _recent_alloc_ctl; | |
190 | |
191 // Blocked array of debugging and profiling information, | |
192 // tracked per node. | |
193 enum { _log2_node_notes_block_size = 8, | |
194 _node_notes_block_size = (1<<_log2_node_notes_block_size) | |
195 }; | |
196 GrowableArray<Node_Notes*>* _node_note_array; | |
197 Node_Notes* _default_node_notes; // default notes for new nodes | |
198 | |
199 // After parsing and every bulk phase we hang onto the Root instruction. | |
200 // The RootNode instruction is where the whole program begins. It produces | |
201 // the initial Control and BOTTOM for everybody else. | |
202 | |
203 // Type management | |
204 Arena _Compile_types; // Arena for all types | |
205 Arena* _type_arena; // Alias for _Compile_types except in Initialize_shared() | |
206 Dict* _type_dict; // Intern table | |
207 void* _type_hwm; // Last allocation (see Type::operator new/delete) | |
208 size_t _type_last_size; // Last allocation size (see Type::operator new/delete) | |
209 ciMethod* _last_tf_m; // Cache for | |
210 const TypeFunc* _last_tf; // TypeFunc::make | |
211 AliasType** _alias_types; // List of alias types seen so far. | |
212 int _num_alias_types; // Logical length of _alias_types | |
213 int _max_alias_types; // Physical length of _alias_types | |
214 AliasCacheEntry _alias_cache[AliasCacheSize]; // Gets aliases w/o data structure walking | |
215 | |
216 // Parsing, optimization | |
217 PhaseGVN* _initial_gvn; // Results of parse-time PhaseGVN | |
218 Unique_Node_List* _for_igvn; // Initial work-list for next round of Iterative GVN | |
219 WarmCallInfo* _warm_calls; // Sorted work-list for heat-based inlining. | |
220 | |
221 // Matching, CFG layout, allocation, code generation | |
222 PhaseCFG* _cfg; // Results of CFG finding | |
223 bool _select_24_bit_instr; // We selected an instruction with a 24-bit result | |
224 bool _in_24_bit_fp_mode; // We are emitting instructions with 24-bit results | |
225 bool _has_java_calls; // True if the method has java calls | |
226 Matcher* _matcher; // Engine to map ideal to machine instructions | |
227 PhaseRegAlloc* _regalloc; // Results of register allocation. | |
228 int _frame_slots; // Size of total frame in stack slots | |
229 CodeOffsets _code_offsets; // Offsets into the code for various interesting entries | |
230 RegMask _FIRST_STACK_mask; // All stack slots usable for spills (depends on frame layout) | |
231 Arena* _indexSet_arena; // control IndexSet allocation within PhaseChaitin | |
232 void* _indexSet_free_block_list; // free list of IndexSet bit blocks | |
233 | |
234 uint _node_bundling_limit; | |
235 Bundle* _node_bundling_base; // Information for instruction bundling | |
236 | |
237 // Instruction bits passed off to the VM | |
238 int _method_size; // Size of nmethod code segment in bytes | |
239 CodeBuffer _code_buffer; // Where the code is assembled | |
240 int _first_block_size; // Size of unvalidated entry point code / OSR poison code | |
241 ExceptionHandlerTable _handler_table; // Table of native-code exception handlers | |
242 ImplicitExceptionTable _inc_table; // Table of implicit null checks in native code | |
243 OopMapSet* _oop_map_set; // Table of oop maps (one for each safepoint location) | |
244 static int _CompiledZap_count; // counter compared against CompileZap[First/Last] | |
245 BufferBlob* _scratch_buffer_blob; // For temporary code buffers. | |
246 relocInfo* _scratch_locs_memory; // For temporary code buffers. | |
247 | |
248 public: | |
249 // Accessors | |
250 | |
251 // The Compile instance currently active in this (compiler) thread. | |
252 static Compile* current() { | |
253 return (Compile*) ciEnv::current()->compiler_data(); | |
254 } | |
255 | |
256 // ID for this compilation. Useful for setting breakpoints in the debugger. | |
257 int compile_id() const { return _compile_id; } | |
258 | |
259 // Does this compilation allow instructions to subsume loads? User | |
260 // instructions that subsume a load may result in an unschedulable | |
261 // instruction sequence. | |
262 bool subsume_loads() const { return _subsume_loads; } | |
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263 // Do escape analysis. |
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264 bool do_escape_analysis() const { return _do_escape_analysis; } |
0 | 265 bool save_argument_registers() const { return _save_argument_registers; } |
266 | |
267 | |
268 // Other fixed compilation parameters. | |
269 ciMethod* method() const { return _method; } | |
270 int entry_bci() const { return _entry_bci; } | |
271 bool is_osr_compilation() const { return _entry_bci != InvocationEntryBci; } | |
272 bool is_method_compilation() const { return (_method != NULL && !_method->flags().is_native()); } | |
273 const TypeFunc* tf() const { assert(_tf!=NULL, ""); return _tf; } | |
274 void init_tf(const TypeFunc* tf) { assert(_tf==NULL, ""); _tf = tf; } | |
275 InlineTree* ilt() const { return _ilt; } | |
276 address stub_function() const { return _stub_function; } | |
277 const char* stub_name() const { return _stub_name; } | |
278 address stub_entry_point() const { return _stub_entry_point; } | |
279 | |
280 // Control of this compilation. | |
281 int fixed_slots() const { assert(_fixed_slots >= 0, ""); return _fixed_slots; } | |
282 void set_fixed_slots(int n) { _fixed_slots = n; } | |
283 int major_progress() const { return _major_progress; } | |
284 void set_major_progress() { _major_progress++; } | |
285 void clear_major_progress() { _major_progress = 0; } | |
286 int num_loop_opts() const { return _num_loop_opts; } | |
287 void set_num_loop_opts(int n) { _num_loop_opts = n; } | |
288 int max_inline_size() const { return _max_inline_size; } | |
289 void set_freq_inline_size(int n) { _freq_inline_size = n; } | |
290 int freq_inline_size() const { return _freq_inline_size; } | |
291 void set_max_inline_size(int n) { _max_inline_size = n; } | |
292 bool deopt_happens() const { return _deopt_happens; } | |
293 bool has_loops() const { return _has_loops; } | |
294 void set_has_loops(bool z) { _has_loops = z; } | |
295 bool has_split_ifs() const { return _has_split_ifs; } | |
296 void set_has_split_ifs(bool z) { _has_split_ifs = z; } | |
297 bool has_unsafe_access() const { return _has_unsafe_access; } | |
298 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } | |
299 void set_trap_count(uint r, uint c) { assert(r < trapHistLength, "oob"); _trap_hist[r] = c; } | |
300 uint trap_count(uint r) const { assert(r < trapHistLength, "oob"); return _trap_hist[r]; } | |
301 bool trap_can_recompile() const { return _trap_can_recompile; } | |
302 void set_trap_can_recompile(bool z) { _trap_can_recompile = z; } | |
303 uint decompile_count() const { return _decompile_count; } | |
304 void set_decompile_count(uint c) { _decompile_count = c; } | |
305 bool allow_range_check_smearing() const; | |
306 bool do_inlining() const { return _do_inlining; } | |
307 void set_do_inlining(bool z) { _do_inlining = z; } | |
308 bool do_scheduling() const { return _do_scheduling; } | |
309 void set_do_scheduling(bool z) { _do_scheduling = z; } | |
310 bool do_count_invocations() const{ return _do_count_invocations; } | |
311 void set_do_count_invocations(bool z){ _do_count_invocations = z; } | |
312 bool do_method_data_update() const { return _do_method_data_update; } | |
313 void set_do_method_data_update(bool z) { _do_method_data_update = z; } | |
314 int AliasLevel() const { return _AliasLevel; } | |
315 bool print_assembly() const { return _print_assembly; } | |
316 void set_print_assembly(bool z) { _print_assembly = z; } | |
317 // check the CompilerOracle for special behaviours for this compile | |
318 bool method_has_option(const char * option) { | |
319 return method() != NULL && method()->has_option(option); | |
320 } | |
321 #ifndef PRODUCT | |
322 bool trace_opto_output() const { return _trace_opto_output; } | |
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323 bool parsed_irreducible_loop() const { return _parsed_irreducible_loop; } |
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324 void set_parsed_irreducible_loop(bool z) { _parsed_irreducible_loop = z; } |
0 | 325 #endif |
326 | |
327 void begin_method() { | |
328 #ifndef PRODUCT | |
329 if (_printer) _printer->begin_method(this); | |
330 #endif | |
331 } | |
332 void print_method(const char * name, int level = 1) { | |
333 #ifndef PRODUCT | |
334 if (_printer) _printer->print_method(this, name, level); | |
335 #endif | |
336 } | |
337 void end_method() { | |
338 #ifndef PRODUCT | |
339 if (_printer) _printer->end_method(); | |
340 #endif | |
341 } | |
342 | |
343 int macro_count() { return _macro_nodes->length(); } | |
344 Node* macro_node(int idx) { return _macro_nodes->at(idx); } | |
345 ConnectionGraph* congraph() { return _congraph;} | |
346 void add_macro_node(Node * n) { | |
347 //assert(n->is_macro(), "must be a macro node"); | |
348 assert(!_macro_nodes->contains(n), " duplicate entry in expand list"); | |
349 _macro_nodes->append(n); | |
350 } | |
351 void remove_macro_node(Node * n) { | |
352 // this function may be called twice for a node so check | |
353 // that the node is in the array before attempting to remove it | |
354 if (_macro_nodes->contains(n)) | |
355 _macro_nodes->remove(n); | |
356 } | |
357 | |
358 // Compilation environment. | |
359 Arena* comp_arena() { return &_comp_arena; } | |
360 ciEnv* env() const { return _env; } | |
361 CompileLog* log() const { return _log; } | |
362 bool failing() const { return _env->failing() || _failure_reason != NULL; } | |
363 const char* failure_reason() { return _failure_reason; } | |
364 bool failure_reason_is(const char* r) { return (r==_failure_reason) || (r!=NULL && _failure_reason!=NULL && strcmp(r, _failure_reason)==0); } | |
365 | |
366 void record_failure(const char* reason); | |
367 void record_method_not_compilable(const char* reason, bool all_tiers = false) { | |
368 // All bailouts cover "all_tiers" when TieredCompilation is off. | |
369 if (!TieredCompilation) all_tiers = true; | |
370 env()->record_method_not_compilable(reason, all_tiers); | |
371 // Record failure reason. | |
372 record_failure(reason); | |
373 } | |
374 void record_method_not_compilable_all_tiers(const char* reason) { | |
375 record_method_not_compilable(reason, true); | |
376 } | |
377 bool check_node_count(uint margin, const char* reason) { | |
378 if (unique() + margin > (uint)MaxNodeLimit) { | |
379 record_method_not_compilable(reason); | |
380 return true; | |
381 } else { | |
382 return false; | |
383 } | |
384 } | |
385 | |
386 // Node management | |
387 uint unique() const { return _unique; } | |
388 uint next_unique() { return _unique++; } | |
389 void set_unique(uint i) { _unique = i; } | |
390 static int debug_idx() { return debug_only(_debug_idx)+0; } | |
391 static void set_debug_idx(int i) { debug_only(_debug_idx = i); } | |
392 Arena* node_arena() { return &_node_arena; } | |
393 Arena* old_arena() { return &_old_arena; } | |
394 RootNode* root() const { return _root; } | |
395 void set_root(RootNode* r) { _root = r; } | |
396 StartNode* start() const; // (Derived from root.) | |
397 void init_start(StartNode* s); | |
398 Node* immutable_memory(); | |
399 | |
400 Node* recent_alloc_ctl() const { return _recent_alloc_ctl; } | |
401 Node* recent_alloc_obj() const { return _recent_alloc_obj; } | |
402 void set_recent_alloc(Node* ctl, Node* obj) { | |
403 _recent_alloc_ctl = ctl; | |
404 _recent_alloc_obj = obj; | |
405 } | |
406 | |
407 // Handy undefined Node | |
408 Node* top() const { return _top; } | |
409 | |
410 // these are used by guys who need to know about creation and transformation of top: | |
411 Node* cached_top_node() { return _top; } | |
412 void set_cached_top_node(Node* tn); | |
413 | |
414 GrowableArray<Node_Notes*>* node_note_array() const { return _node_note_array; } | |
415 void set_node_note_array(GrowableArray<Node_Notes*>* arr) { _node_note_array = arr; } | |
416 Node_Notes* default_node_notes() const { return _default_node_notes; } | |
417 void set_default_node_notes(Node_Notes* n) { _default_node_notes = n; } | |
418 | |
419 Node_Notes* node_notes_at(int idx) { | |
420 return locate_node_notes(_node_note_array, idx, false); | |
421 } | |
422 inline bool set_node_notes_at(int idx, Node_Notes* value); | |
423 | |
424 // Copy notes from source to dest, if they exist. | |
425 // Overwrite dest only if source provides something. | |
426 // Return true if information was moved. | |
427 bool copy_node_notes_to(Node* dest, Node* source); | |
428 | |
429 // Workhorse function to sort out the blocked Node_Notes array: | |
430 inline Node_Notes* locate_node_notes(GrowableArray<Node_Notes*>* arr, | |
431 int idx, bool can_grow = false); | |
432 | |
433 void grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by); | |
434 | |
435 // Type management | |
436 Arena* type_arena() { return _type_arena; } | |
437 Dict* type_dict() { return _type_dict; } | |
438 void* type_hwm() { return _type_hwm; } | |
439 size_t type_last_size() { return _type_last_size; } | |
440 int num_alias_types() { return _num_alias_types; } | |
441 | |
442 void init_type_arena() { _type_arena = &_Compile_types; } | |
443 void set_type_arena(Arena* a) { _type_arena = a; } | |
444 void set_type_dict(Dict* d) { _type_dict = d; } | |
445 void set_type_hwm(void* p) { _type_hwm = p; } | |
446 void set_type_last_size(size_t sz) { _type_last_size = sz; } | |
447 | |
448 const TypeFunc* last_tf(ciMethod* m) { | |
449 return (m == _last_tf_m) ? _last_tf : NULL; | |
450 } | |
451 void set_last_tf(ciMethod* m, const TypeFunc* tf) { | |
452 assert(m != NULL || tf == NULL, ""); | |
453 _last_tf_m = m; | |
454 _last_tf = tf; | |
455 } | |
456 | |
457 AliasType* alias_type(int idx) { assert(idx < num_alias_types(), "oob"); return _alias_types[idx]; } | |
458 AliasType* alias_type(const TypePtr* adr_type) { return find_alias_type(adr_type, false); } | |
459 bool have_alias_type(const TypePtr* adr_type); | |
460 AliasType* alias_type(ciField* field); | |
461 | |
462 int get_alias_index(const TypePtr* at) { return alias_type(at)->index(); } | |
463 const TypePtr* get_adr_type(uint aidx) { return alias_type(aidx)->adr_type(); } | |
464 int get_general_index(uint aidx) { return alias_type(aidx)->general_index(); } | |
465 | |
466 // Building nodes | |
467 void rethrow_exceptions(JVMState* jvms); | |
468 void return_values(JVMState* jvms); | |
469 JVMState* build_start_state(StartNode* start, const TypeFunc* tf); | |
470 | |
471 // Decide how to build a call. | |
472 // The profile factor is a discount to apply to this site's interp. profile. | |
473 CallGenerator* call_generator(ciMethod* call_method, int vtable_index, bool call_is_virtual, JVMState* jvms, bool allow_inline, float profile_factor); | |
474 | |
475 // Report if there were too many traps at a current method and bci. | |
476 // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded. | |
477 // If there is no MDO at all, report no trap unless told to assume it. | |
478 bool too_many_traps(ciMethod* method, int bci, Deoptimization::DeoptReason reason); | |
479 // This version, unspecific to a particular bci, asks if | |
480 // PerMethodTrapLimit was exceeded for all inlined methods seen so far. | |
481 bool too_many_traps(Deoptimization::DeoptReason reason, | |
482 // Privately used parameter for logging: | |
483 ciMethodData* logmd = NULL); | |
484 // Report if there were too many recompiles at a method and bci. | |
485 bool too_many_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason); | |
486 | |
487 // Parsing, optimization | |
488 PhaseGVN* initial_gvn() { return _initial_gvn; } | |
489 Unique_Node_List* for_igvn() { return _for_igvn; } | |
490 inline void record_for_igvn(Node* n); // Body is after class Unique_Node_List. | |
491 void set_initial_gvn(PhaseGVN *gvn) { _initial_gvn = gvn; } | |
492 void set_for_igvn(Unique_Node_List *for_igvn) { _for_igvn = for_igvn; } | |
493 | |
494 void identify_useful_nodes(Unique_Node_List &useful); | |
495 void remove_useless_nodes (Unique_Node_List &useful); | |
496 | |
497 WarmCallInfo* warm_calls() const { return _warm_calls; } | |
498 void set_warm_calls(WarmCallInfo* l) { _warm_calls = l; } | |
499 WarmCallInfo* pop_warm_call(); | |
500 | |
501 // Matching, CFG layout, allocation, code generation | |
502 PhaseCFG* cfg() { return _cfg; } | |
503 bool select_24_bit_instr() const { return _select_24_bit_instr; } | |
504 bool in_24_bit_fp_mode() const { return _in_24_bit_fp_mode; } | |
505 bool has_java_calls() const { return _has_java_calls; } | |
506 Matcher* matcher() { return _matcher; } | |
507 PhaseRegAlloc* regalloc() { return _regalloc; } | |
508 int frame_slots() const { return _frame_slots; } | |
509 int frame_size_in_words() const; // frame_slots in units of the polymorphic 'words' | |
510 RegMask& FIRST_STACK_mask() { return _FIRST_STACK_mask; } | |
511 Arena* indexSet_arena() { return _indexSet_arena; } | |
512 void* indexSet_free_block_list() { return _indexSet_free_block_list; } | |
513 uint node_bundling_limit() { return _node_bundling_limit; } | |
514 Bundle* node_bundling_base() { return _node_bundling_base; } | |
515 void set_node_bundling_limit(uint n) { _node_bundling_limit = n; } | |
516 void set_node_bundling_base(Bundle* b) { _node_bundling_base = b; } | |
517 bool starts_bundle(const Node *n) const; | |
518 bool need_stack_bang(int frame_size_in_bytes) const; | |
519 bool need_register_stack_bang() const; | |
520 | |
521 void set_matcher(Matcher* m) { _matcher = m; } | |
522 //void set_regalloc(PhaseRegAlloc* ra) { _regalloc = ra; } | |
523 void set_indexSet_arena(Arena* a) { _indexSet_arena = a; } | |
524 void set_indexSet_free_block_list(void* p) { _indexSet_free_block_list = p; } | |
525 | |
526 // Remember if this compilation changes hardware mode to 24-bit precision | |
527 void set_24_bit_selection_and_mode(bool selection, bool mode) { | |
528 _select_24_bit_instr = selection; | |
529 _in_24_bit_fp_mode = mode; | |
530 } | |
531 | |
532 void set_has_java_calls(bool z) { _has_java_calls = z; } | |
533 | |
534 // Instruction bits passed off to the VM | |
535 int code_size() { return _method_size; } | |
536 CodeBuffer* code_buffer() { return &_code_buffer; } | |
537 int first_block_size() { return _first_block_size; } | |
538 void set_frame_complete(int off) { _code_offsets.set_value(CodeOffsets::Frame_Complete, off); } | |
539 ExceptionHandlerTable* handler_table() { return &_handler_table; } | |
540 ImplicitExceptionTable* inc_table() { return &_inc_table; } | |
541 OopMapSet* oop_map_set() { return _oop_map_set; } | |
542 DebugInformationRecorder* debug_info() { return env()->debug_info(); } | |
543 Dependencies* dependencies() { return env()->dependencies(); } | |
544 static int CompiledZap_count() { return _CompiledZap_count; } | |
545 BufferBlob* scratch_buffer_blob() { return _scratch_buffer_blob; } | |
546 void init_scratch_buffer_blob(); | |
547 void set_scratch_buffer_blob(BufferBlob* b) { _scratch_buffer_blob = b; } | |
548 relocInfo* scratch_locs_memory() { return _scratch_locs_memory; } | |
549 void set_scratch_locs_memory(relocInfo* b) { _scratch_locs_memory = b; } | |
550 | |
551 // emit to scratch blob, report resulting size | |
552 uint scratch_emit_size(const Node* n); | |
553 | |
554 enum ScratchBufferBlob { | |
555 MAX_inst_size = 1024, | |
556 MAX_locs_size = 128, // number of relocInfo elements | |
557 MAX_const_size = 128, | |
558 MAX_stubs_size = 128 | |
559 }; | |
560 | |
561 // Major entry point. Given a Scope, compile the associated method. | |
562 // For normal compilations, entry_bci is InvocationEntryBci. For on stack | |
563 // replacement, entry_bci indicates the bytecode for which to compile a | |
564 // continuation. | |
565 Compile(ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, | |
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566 int entry_bci, bool subsume_loads, bool do_escape_analysis); |
0 | 567 |
568 // Second major entry point. From the TypeFunc signature, generate code | |
569 // to pass arguments from the Java calling convention to the C calling | |
570 // convention. | |
571 Compile(ciEnv* ci_env, const TypeFunc *(*gen)(), | |
572 address stub_function, const char *stub_name, | |
573 int is_fancy_jump, bool pass_tls, | |
574 bool save_arg_registers, bool return_pc); | |
575 | |
576 // From the TypeFunc signature, generate code to pass arguments | |
577 // from Compiled calling convention to Interpreter's calling convention | |
578 void Generate_Compiled_To_Interpreter_Graph(const TypeFunc *tf, address interpreter_entry); | |
579 | |
580 // From the TypeFunc signature, generate code to pass arguments | |
581 // from Interpreter's calling convention to Compiler's calling convention | |
582 void Generate_Interpreter_To_Compiled_Graph(const TypeFunc *tf); | |
583 | |
584 // Are we compiling a method? | |
585 bool has_method() { return method() != NULL; } | |
586 | |
587 // Maybe print some information about this compile. | |
588 void print_compile_messages(); | |
589 | |
590 // Final graph reshaping, a post-pass after the regular optimizer is done. | |
591 bool final_graph_reshaping(); | |
592 | |
593 // returns true if adr is completely contained in the given alias category | |
594 bool must_alias(const TypePtr* adr, int alias_idx); | |
595 | |
596 // returns true if adr overlaps with the given alias category | |
597 bool can_alias(const TypePtr* adr, int alias_idx); | |
598 | |
599 // Driver for converting compiler's IR into machine code bits | |
600 void Output(); | |
601 | |
602 // Accessors for node bundling info. | |
603 Bundle* node_bundling(const Node *n); | |
604 bool valid_bundle_info(const Node *n); | |
605 | |
606 // Schedule and Bundle the instructions | |
607 void ScheduleAndBundle(); | |
608 | |
609 // Build OopMaps for each GC point | |
610 void BuildOopMaps(); | |
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611 |
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612 // Append debug info for the node "local" at safepoint node "sfpt" to the |
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613 // "array", May also consult and add to "objs", which describes the |
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614 // scalar-replaced objects. |
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615 void FillLocArray( int idx, MachSafePointNode* sfpt, |
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616 Node *local, GrowableArray<ScopeValue*> *array, |
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617 GrowableArray<ScopeValue*> *objs ); |
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618 |
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619 // If "objs" contains an ObjectValue whose id is "id", returns it, else NULL. |
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620 static ObjectValue* sv_for_node_id(GrowableArray<ScopeValue*> *objs, int id); |
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621 // Requres that "objs" does not contains an ObjectValue whose id matches |
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622 // that of "sv. Appends "sv". |
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623 static void set_sv_for_object_node(GrowableArray<ScopeValue*> *objs, |
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624 ObjectValue* sv ); |
0 | 625 |
626 // Process an OopMap Element while emitting nodes | |
627 void Process_OopMap_Node(MachNode *mach, int code_offset); | |
628 | |
629 // Write out basic block data to code buffer | |
630 void Fill_buffer(); | |
631 | |
632 // Determine which variable sized branches can be shortened | |
633 void Shorten_branches(Label *labels, int& code_size, int& reloc_size, int& stub_size, int& const_size); | |
634 | |
635 // Compute the size of first NumberOfLoopInstrToAlign instructions | |
636 // at the head of a loop. | |
637 void compute_loop_first_inst_sizes(); | |
638 | |
639 // Compute the information for the exception tables | |
640 void FillExceptionTables(uint cnt, uint *call_returns, uint *inct_starts, Label *blk_labels); | |
641 | |
642 // Stack slots that may be unused by the calling convention but must | |
643 // otherwise be preserved. On Intel this includes the return address. | |
644 // On PowerPC it includes the 4 words holding the old TOC & LR glue. | |
645 uint in_preserve_stack_slots(); | |
646 | |
647 // "Top of Stack" slots that may be unused by the calling convention but must | |
648 // otherwise be preserved. | |
649 // On Intel these are not necessary and the value can be zero. | |
650 // On Sparc this describes the words reserved for storing a register window | |
651 // when an interrupt occurs. | |
652 static uint out_preserve_stack_slots(); | |
653 | |
654 // Number of outgoing stack slots killed above the out_preserve_stack_slots | |
655 // for calls to C. Supports the var-args backing area for register parms. | |
656 uint varargs_C_out_slots_killed() const; | |
657 | |
658 // Number of Stack Slots consumed by a synchronization entry | |
659 int sync_stack_slots() const; | |
660 | |
661 // Compute the name of old_SP. See <arch>.ad for frame layout. | |
662 OptoReg::Name compute_old_SP(); | |
663 | |
664 #ifdef ENABLE_ZAP_DEAD_LOCALS | |
665 static bool is_node_getting_a_safepoint(Node*); | |
666 void Insert_zap_nodes(); | |
667 Node* call_zap_node(MachSafePointNode* n, int block_no); | |
668 #endif | |
669 | |
670 private: | |
671 // Phase control: | |
672 void Init(int aliaslevel); // Prepare for a single compilation | |
673 int Inline_Warm(); // Find more inlining work. | |
674 void Finish_Warm(); // Give up on further inlines. | |
675 void Optimize(); // Given a graph, optimize it | |
676 void Code_Gen(); // Generate code from a graph | |
677 | |
678 // Management of the AliasType table. | |
679 void grow_alias_types(); | |
680 AliasCacheEntry* probe_alias_cache(const TypePtr* adr_type); | |
681 const TypePtr *flatten_alias_type(const TypePtr* adr_type) const; | |
682 AliasType* find_alias_type(const TypePtr* adr_type, bool no_create); | |
683 | |
684 void verify_top(Node*) const PRODUCT_RETURN; | |
685 | |
686 // Intrinsic setup. | |
687 void register_library_intrinsics(); // initializer | |
688 CallGenerator* make_vm_intrinsic(ciMethod* m, bool is_virtual); // constructor | |
689 int intrinsic_insertion_index(ciMethod* m, bool is_virtual); // helper | |
690 CallGenerator* find_intrinsic(ciMethod* m, bool is_virtual); // query fn | |
691 void register_intrinsic(CallGenerator* cg); // update fn | |
692 | |
693 #ifndef PRODUCT | |
694 static juint _intrinsic_hist_count[vmIntrinsics::ID_LIMIT]; | |
695 static jubyte _intrinsic_hist_flags[vmIntrinsics::ID_LIMIT]; | |
696 #endif | |
697 | |
698 public: | |
699 | |
700 // Note: Histogram array size is about 1 Kb. | |
701 enum { // flag bits: | |
702 _intrinsic_worked = 1, // succeeded at least once | |
703 _intrinsic_failed = 2, // tried it but it failed | |
704 _intrinsic_disabled = 4, // was requested but disabled (e.g., -XX:-InlineUnsafeOps) | |
705 _intrinsic_virtual = 8, // was seen in the virtual form (rare) | |
706 _intrinsic_both = 16 // was seen in the non-virtual form (usual) | |
707 }; | |
708 // Update histogram. Return boolean if this is a first-time occurrence. | |
709 static bool gather_intrinsic_statistics(vmIntrinsics::ID id, | |
710 bool is_virtual, int flags) PRODUCT_RETURN0; | |
711 static void print_intrinsic_statistics() PRODUCT_RETURN; | |
712 | |
713 // Graph verification code | |
714 // Walk the node list, verifying that there is a one-to-one | |
715 // correspondence between Use-Def edges and Def-Use edges | |
716 // The option no_dead_code enables stronger checks that the | |
717 // graph is strongly connected from root in both directions. | |
718 void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN; | |
719 | |
720 // Print bytecodes, including the scope inlining tree | |
721 void print_codes(); | |
722 | |
723 // End-of-run dumps. | |
724 static void print_statistics() PRODUCT_RETURN; | |
725 | |
726 // Dump formatted assembly | |
727 void dump_asm(int *pcs = NULL, uint pc_limit = 0) PRODUCT_RETURN; | |
728 void dump_pc(int *pcs, int pc_limit, Node *n); | |
729 | |
730 // Verify ADLC assumptions during startup | |
731 static void adlc_verification() PRODUCT_RETURN; | |
732 | |
733 // Definitions of pd methods | |
734 static void pd_compiler2_init(); | |
735 }; |