Mercurial > hg > graal-compiler
annotate src/share/vm/opto/doCall.cpp @ 1138:dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance.
Reviewed-by: kvn, never
author | twisti |
---|---|
date | Tue, 05 Jan 2010 15:21:25 +0100 |
parents | 97125851f396 |
children | c3b315a0d58a |
rev | line source |
---|---|
0 | 1 /* |
844 | 2 * Copyright 1998-2009 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 #include "incls/_precompiled.incl" | |
26 #include "incls/_doCall.cpp.incl" | |
27 | |
28 #ifndef PRODUCT | |
29 void trace_type_profile(ciMethod *method, int depth, int bci, ciMethod *prof_method, ciKlass *prof_klass, int site_count, int receiver_count) { | |
30 if (TraceTypeProfile || PrintInlining || PrintOptoInlining) { | |
31 tty->print(" "); | |
32 for( int i = 0; i < depth; i++ ) tty->print(" "); | |
33 if (!PrintOpto) { | |
34 method->print_short_name(); | |
35 tty->print(" ->"); | |
36 } | |
37 tty->print(" @ %d ", bci); | |
38 prof_method->print_short_name(); | |
39 tty->print(" >>TypeProfile (%d/%d counts) = ", receiver_count, site_count); | |
40 prof_klass->name()->print_symbol(); | |
41 tty->print_cr(" (%d bytes)", prof_method->code_size()); | |
42 } | |
43 } | |
44 #endif | |
45 | |
46 CallGenerator* Compile::call_generator(ciMethod* call_method, int vtable_index, bool call_is_virtual, JVMState* jvms, bool allow_inline, float prof_factor) { | |
47 CallGenerator* cg; | |
48 | |
49 // Dtrace currently doesn't work unless all calls are vanilla | |
780
c96bf21b756f
6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
kvn
parents:
726
diff
changeset
|
50 if (env()->dtrace_method_probes()) { |
0 | 51 allow_inline = false; |
52 } | |
53 | |
54 // Note: When we get profiling during stage-1 compiles, we want to pull | |
55 // from more specific profile data which pertains to this inlining. | |
56 // Right now, ignore the information in jvms->caller(), and do method[bci]. | |
57 ciCallProfile profile = jvms->method()->call_profile_at_bci(jvms->bci()); | |
58 | |
59 // See how many times this site has been invoked. | |
60 int site_count = profile.count(); | |
61 int receiver_count = -1; | |
62 if (call_is_virtual && UseTypeProfile && profile.has_receiver(0)) { | |
63 // Receivers in the profile structure are ordered by call counts | |
64 // so that the most called (major) receiver is profile.receiver(0). | |
65 receiver_count = profile.receiver_count(0); | |
66 } | |
67 | |
68 CompileLog* log = this->log(); | |
69 if (log != NULL) { | |
70 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1; | |
71 int r2id = (profile.morphism() == 2)? log->identify(profile.receiver(1)):-1; | |
72 log->begin_elem("call method='%d' count='%d' prof_factor='%g'", | |
73 log->identify(call_method), site_count, prof_factor); | |
74 if (call_is_virtual) log->print(" virtual='1'"); | |
75 if (allow_inline) log->print(" inline='1'"); | |
76 if (receiver_count >= 0) { | |
77 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count); | |
78 if (profile.has_receiver(1)) { | |
79 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1)); | |
80 } | |
81 } | |
82 log->end_elem(); | |
83 } | |
84 | |
85 // Special case the handling of certain common, profitable library | |
86 // methods. If these methods are replaced with specialized code, | |
87 // then we return it as the inlined version of the call. | |
88 // We do this before the strict f.p. check below because the | |
89 // intrinsics handle strict f.p. correctly. | |
90 if (allow_inline) { | |
91 cg = find_intrinsic(call_method, call_is_virtual); | |
92 if (cg != NULL) return cg; | |
93 } | |
94 | |
95 // Do not inline strict fp into non-strict code, or the reverse | |
96 bool caller_method_is_strict = jvms->method()->is_strict(); | |
97 if( caller_method_is_strict ^ call_method->is_strict() ) { | |
98 allow_inline = false; | |
99 } | |
100 | |
101 // Attempt to inline... | |
102 if (allow_inline) { | |
103 // The profile data is only partly attributable to this caller, | |
104 // scale back the call site information. | |
105 float past_uses = jvms->method()->scale_count(site_count, prof_factor); | |
106 // This is the number of times we expect the call code to be used. | |
107 float expected_uses = past_uses; | |
108 | |
109 // Try inlining a bytecoded method: | |
110 if (!call_is_virtual) { | |
111 InlineTree* ilt; | |
112 if (UseOldInlining) { | |
113 ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method()); | |
114 } else { | |
115 // Make a disembodied, stateless ILT. | |
116 // TO DO: When UseOldInlining is removed, copy the ILT code elsewhere. | |
117 float site_invoke_ratio = prof_factor; | |
118 // Note: ilt is for the root of this parse, not the present call site. | |
119 ilt = new InlineTree(this, jvms->method(), jvms->caller(), site_invoke_ratio); | |
120 } | |
121 WarmCallInfo scratch_ci; | |
122 if (!UseOldInlining) | |
123 scratch_ci.init(jvms, call_method, profile, prof_factor); | |
124 WarmCallInfo* ci = ilt->ok_to_inline(call_method, jvms, profile, &scratch_ci); | |
125 assert(ci != &scratch_ci, "do not let this pointer escape"); | |
126 bool allow_inline = (ci != NULL && !ci->is_cold()); | |
127 bool require_inline = (allow_inline && ci->is_hot()); | |
128 | |
129 if (allow_inline) { | |
130 CallGenerator* cg = CallGenerator::for_inline(call_method, expected_uses); | |
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
131 if (require_inline && cg != NULL && should_delay_inlining(call_method, jvms)) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
132 // Delay the inlining of this method to give us the |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
133 // opportunity to perform some high level optimizations |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
134 // first. |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
135 return CallGenerator::for_late_inline(call_method, cg); |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
136 } |
0 | 137 if (cg == NULL) { |
138 // Fall through. | |
139 } else if (require_inline || !InlineWarmCalls) { | |
140 return cg; | |
141 } else { | |
142 CallGenerator* cold_cg = call_generator(call_method, vtable_index, call_is_virtual, jvms, false, prof_factor); | |
143 return CallGenerator::for_warm_call(ci, cold_cg, cg); | |
144 } | |
145 } | |
146 } | |
147 | |
148 // Try using the type profile. | |
149 if (call_is_virtual && site_count > 0 && receiver_count > 0) { | |
150 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count. | |
151 bool have_major_receiver = (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent); | |
152 ciMethod* receiver_method = NULL; | |
153 if (have_major_receiver || profile.morphism() == 1 || | |
154 (profile.morphism() == 2 && UseBimorphicInlining)) { | |
155 // receiver_method = profile.method(); | |
156 // Profiles do not suggest methods now. Look it up in the major receiver. | |
157 receiver_method = call_method->resolve_invoke(jvms->method()->holder(), | |
158 profile.receiver(0)); | |
159 } | |
160 if (receiver_method != NULL) { | |
161 // The single majority receiver sufficiently outweighs the minority. | |
162 CallGenerator* hit_cg = this->call_generator(receiver_method, | |
163 vtable_index, !call_is_virtual, jvms, allow_inline, prof_factor); | |
164 if (hit_cg != NULL) { | |
165 // Look up second receiver. | |
166 CallGenerator* next_hit_cg = NULL; | |
167 ciMethod* next_receiver_method = NULL; | |
168 if (profile.morphism() == 2 && UseBimorphicInlining) { | |
169 next_receiver_method = call_method->resolve_invoke(jvms->method()->holder(), | |
170 profile.receiver(1)); | |
171 if (next_receiver_method != NULL) { | |
172 next_hit_cg = this->call_generator(next_receiver_method, | |
173 vtable_index, !call_is_virtual, jvms, | |
174 allow_inline, prof_factor); | |
175 if (next_hit_cg != NULL && !next_hit_cg->is_inline() && | |
176 have_major_receiver && UseOnlyInlinedBimorphic) { | |
177 // Skip if we can't inline second receiver's method | |
178 next_hit_cg = NULL; | |
179 } | |
180 } | |
181 } | |
182 CallGenerator* miss_cg; | |
183 if (( profile.morphism() == 1 || | |
184 (profile.morphism() == 2 && next_hit_cg != NULL) ) && | |
185 | |
186 !too_many_traps(Deoptimization::Reason_class_check) | |
187 | |
188 // Check only total number of traps per method to allow | |
189 // the transition from monomorphic to bimorphic case between | |
190 // compilations without falling into virtual call. | |
191 // A monomorphic case may have the class_check trap flag is set | |
192 // due to the time gap between the uncommon trap processing | |
193 // when flags are set in MDO and the call site bytecode execution | |
194 // in Interpreter when MDO counters are updated. | |
195 // There was also class_check trap in monomorphic case due to | |
196 // the bug 6225440. | |
197 | |
198 ) { | |
199 // Generate uncommon trap for class check failure path | |
200 // in case of monomorphic or bimorphic virtual call site. | |
201 miss_cg = CallGenerator::for_uncommon_trap(call_method, | |
202 Deoptimization::Reason_class_check, | |
203 Deoptimization::Action_maybe_recompile); | |
204 } else { | |
205 // Generate virtual call for class check failure path | |
206 // in case of polymorphic virtual call site. | |
207 miss_cg = CallGenerator::for_virtual_call(call_method, vtable_index); | |
208 } | |
209 if (miss_cg != NULL) { | |
210 if (next_hit_cg != NULL) { | |
211 NOT_PRODUCT(trace_type_profile(jvms->method(), jvms->depth(), jvms->bci(), next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1))); | |
212 // We don't need to record dependency on a receiver here and below. | |
213 // Whenever we inline, the dependency is added by Parse::Parse(). | |
214 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX); | |
215 } | |
216 if (miss_cg != NULL) { | |
217 NOT_PRODUCT(trace_type_profile(jvms->method(), jvms->depth(), jvms->bci(), receiver_method, profile.receiver(0), site_count, receiver_count)); | |
218 cg = CallGenerator::for_predicted_call(profile.receiver(0), miss_cg, hit_cg, profile.receiver_prob(0)); | |
219 if (cg != NULL) return cg; | |
220 } | |
221 } | |
222 } | |
223 } | |
224 } | |
225 } | |
226 | |
1138
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
227 // Do MethodHandle calls. |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
228 if (call_method->is_method_handle_invoke()) { |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
229 if (jvms->method()->java_code_at_bci(jvms->bci()) != Bytecodes::_invokedynamic) { |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
230 GraphKit kit(jvms); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
231 Node* n = kit.argument(0); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
232 |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
233 if (n->Opcode() == Op_ConP) { |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
234 const TypeOopPtr* oop_ptr = n->bottom_type()->is_oopptr(); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
235 ciObject* const_oop = oop_ptr->const_oop(); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
236 ciMethodHandle* method_handle = const_oop->as_method_handle(); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
237 |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
238 // Set the actually called method to have access to the class |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
239 // and signature in the MethodHandleCompiler. |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
240 method_handle->set_callee(call_method); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
241 |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
242 // Get an adapter for the MethodHandle. |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
243 ciMethod* target_method = method_handle->get_method_handle_adapter(); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
244 |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
245 CallGenerator* hit_cg = this->call_generator(target_method, vtable_index, false, jvms, true, prof_factor); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
246 if (hit_cg != NULL && hit_cg->is_inline()) |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
247 return hit_cg; |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
248 } |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
249 |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
250 return CallGenerator::for_direct_call(call_method); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
251 } |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
252 else { |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
253 // Get the MethodHandle from the CallSite. |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
254 ciMethod* caller_method = jvms->method(); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
255 ciBytecodeStream str(caller_method); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
256 str.force_bci(jvms->bci()); // Set the stream to the invokedynamic bci. |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
257 ciCallSite* call_site = str.get_call_site(); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
258 ciMethodHandle* method_handle = call_site->get_target(); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
259 |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
260 // Set the actually called method to have access to the class |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
261 // and signature in the MethodHandleCompiler. |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
262 method_handle->set_callee(call_method); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
263 |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
264 // Get an adapter for the MethodHandle. |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
265 ciMethod* target_method = method_handle->get_invokedynamic_adapter(); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
266 |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
267 CallGenerator* hit_cg = this->call_generator(target_method, vtable_index, false, jvms, true, prof_factor); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
268 if (hit_cg != NULL && hit_cg->is_inline()) { |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
269 CallGenerator* miss_cg = CallGenerator::for_dynamic_call(call_method); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
270 return CallGenerator::for_predicted_dynamic_call(method_handle, miss_cg, hit_cg, prof_factor); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
271 } |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
272 |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
273 // If something failed, generate a normal dynamic call. |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
274 return CallGenerator::for_dynamic_call(call_method); |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
275 } |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
276 } |
dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
twisti
parents:
1137
diff
changeset
|
277 |
0 | 278 // There was no special inlining tactic, or it bailed out. |
279 // Use a more generic tactic, like a simple call. | |
280 if (call_is_virtual) { | |
281 return CallGenerator::for_virtual_call(call_method, vtable_index); | |
282 } else { | |
283 // Class Hierarchy Analysis or Type Profile reveals a unique target, | |
284 // or it is a static or special call. | |
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
285 return CallGenerator::for_direct_call(call_method, should_delay_inlining(call_method, jvms)); |
0 | 286 } |
287 } | |
288 | |
1080
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
289 // Return true for methods that shouldn't be inlined early so that |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
290 // they are easier to analyze and optimize as intrinsics. |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
291 bool Compile::should_delay_inlining(ciMethod* call_method, JVMState* jvms) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
292 if (has_stringbuilder()) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
293 |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
294 if ((call_method->holder() == C->env()->StringBuilder_klass() || |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
295 call_method->holder() == C->env()->StringBuffer_klass()) && |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
296 (jvms->method()->holder() == C->env()->StringBuilder_klass() || |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
297 jvms->method()->holder() == C->env()->StringBuffer_klass())) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
298 // Delay SB calls only when called from non-SB code |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
299 return false; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
300 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
301 |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
302 switch (call_method->intrinsic_id()) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
303 case vmIntrinsics::_StringBuilder_void: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
304 case vmIntrinsics::_StringBuilder_int: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
305 case vmIntrinsics::_StringBuilder_String: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
306 case vmIntrinsics::_StringBuilder_append_char: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
307 case vmIntrinsics::_StringBuilder_append_int: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
308 case vmIntrinsics::_StringBuilder_append_String: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
309 case vmIntrinsics::_StringBuilder_toString: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
310 case vmIntrinsics::_StringBuffer_void: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
311 case vmIntrinsics::_StringBuffer_int: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
312 case vmIntrinsics::_StringBuffer_String: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
313 case vmIntrinsics::_StringBuffer_append_char: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
314 case vmIntrinsics::_StringBuffer_append_int: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
315 case vmIntrinsics::_StringBuffer_append_String: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
316 case vmIntrinsics::_StringBuffer_toString: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
317 case vmIntrinsics::_Integer_toString: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
318 return true; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
319 |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
320 case vmIntrinsics::_String_String: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
321 { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
322 Node* receiver = jvms->map()->in(jvms->argoff() + 1); |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
323 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) { |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
324 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava(); |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
325 ciMethod* m = csj->method(); |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
326 if (m != NULL && |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
327 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString || |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
328 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString)) |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
329 // Delay String.<init>(new SB()) |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
330 return true; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
331 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
332 return false; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
333 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
334 |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
335 default: |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
336 return false; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
337 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
338 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
339 return false; |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
340 } |
7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
never
parents:
844
diff
changeset
|
341 |
0 | 342 |
343 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link | |
344 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) { | |
345 // Additional inputs to consider... | |
346 // bc = bc() | |
347 // caller = method() | |
348 // iter().get_method_holder_index() | |
349 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" ); | |
350 // Interface classes can be loaded & linked and never get around to | |
351 // being initialized. Uncommon-trap for not-initialized static or | |
352 // v-calls. Let interface calls happen. | |
1137
97125851f396
6829187: compiler optimizations required for JSR 292
twisti
parents:
1135
diff
changeset
|
353 ciInstanceKlass* holder_klass = dest_method->holder(); |
0 | 354 if (!holder_klass->is_initialized() && |
355 !holder_klass->is_interface()) { | |
356 uncommon_trap(Deoptimization::Reason_uninitialized, | |
357 Deoptimization::Action_reinterpret, | |
358 holder_klass); | |
359 return true; | |
360 } | |
361 | |
362 assert(dest_method->will_link(method()->holder(), klass, bc()), "dest_method: typeflow responsibility"); | |
363 return false; | |
364 } | |
365 | |
366 | |
367 //------------------------------do_call---------------------------------------- | |
368 // Handle your basic call. Inline if we can & want to, else just setup call. | |
369 void Parse::do_call() { | |
370 // It's likely we are going to add debug info soon. | |
371 // Also, if we inline a guy who eventually needs debug info for this JVMS, | |
372 // our contribution to it is cleaned up right here. | |
373 kill_dead_locals(); | |
374 | |
375 // Set frequently used booleans | |
376 bool is_virtual = bc() == Bytecodes::_invokevirtual; | |
377 bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface; | |
378 bool has_receiver = is_virtual_or_interface || bc() == Bytecodes::_invokespecial; | |
1137
97125851f396
6829187: compiler optimizations required for JSR 292
twisti
parents:
1135
diff
changeset
|
379 bool is_invokedynamic = bc() == Bytecodes::_invokedynamic; |
0 | 380 |
381 // Find target being called | |
382 bool will_link; | |
383 ciMethod* dest_method = iter().get_method(will_link); | |
384 ciInstanceKlass* holder_klass = dest_method->holder(); | |
385 ciKlass* holder = iter().get_declared_method_holder(); | |
386 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder); | |
387 | |
1137
97125851f396
6829187: compiler optimizations required for JSR 292
twisti
parents:
1135
diff
changeset
|
388 int nargs = dest_method->arg_size(); |
97125851f396
6829187: compiler optimizations required for JSR 292
twisti
parents:
1135
diff
changeset
|
389 if (is_invokedynamic) nargs -= 1; |
0 | 390 |
391 // uncommon-trap when callee is unloaded, uninitialized or will not link | |
392 // bailout when too many arguments for register representation | |
393 if (!will_link || can_not_compile_call_site(dest_method, klass)) { | |
394 #ifndef PRODUCT | |
395 if (PrintOpto && (Verbose || WizardMode)) { | |
396 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci()); | |
397 dest_method->print_name(); tty->cr(); | |
398 } | |
399 #endif | |
400 return; | |
401 } | |
402 assert(holder_klass->is_loaded(), ""); | |
1137
97125851f396
6829187: compiler optimizations required for JSR 292
twisti
parents:
1135
diff
changeset
|
403 assert((dest_method->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); |
0 | 404 // Note: this takes into account invokeinterface of methods declared in java/lang/Object, |
405 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces | |
406 assert(holder_klass->is_interface() || holder_klass->super() == NULL || (bc() != Bytecodes::_invokeinterface), "must match bc"); | |
407 // Note: In the absence of miranda methods, an abstract class K can perform | |
408 // an invokevirtual directly on an interface method I.m if K implements I. | |
409 | |
410 // --------------------- | |
411 // Does Class Hierarchy Analysis reveal only a single target of a v-call? | |
412 // Then we may inline or make a static call, but become dependent on there being only 1 target. | |
413 // Does the call-site type profile reveal only one receiver? | |
414 // Then we may introduce a run-time check and inline on the path where it succeeds. | |
415 // The other path may uncommon_trap, check for another receiver, or do a v-call. | |
416 | |
417 // Choose call strategy. | |
418 bool call_is_virtual = is_virtual_or_interface; | |
419 int vtable_index = methodOopDesc::invalid_vtable_index; | |
420 ciMethod* call_method = dest_method; | |
421 | |
422 // Try to get the most accurate receiver type | |
423 if (is_virtual_or_interface) { | |
424 Node* receiver_node = stack(sp() - nargs); | |
425 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr(); | |
426 ciMethod* optimized_virtual_method = optimize_inlining(method(), bci(), klass, dest_method, receiver_type); | |
427 | |
428 // Have the call been sufficiently improved such that it is no longer a virtual? | |
429 if (optimized_virtual_method != NULL) { | |
430 call_method = optimized_virtual_method; | |
431 call_is_virtual = false; | |
432 } else if (!UseInlineCaches && is_virtual && call_method->is_loaded()) { | |
433 // We can make a vtable call at this site | |
434 vtable_index = call_method->resolve_vtable_index(method()->holder(), klass); | |
435 } | |
436 } | |
437 | |
438 // Note: It's OK to try to inline a virtual call. | |
439 // The call generator will not attempt to inline a polymorphic call | |
440 // unless it knows how to optimize the receiver dispatch. | |
441 bool try_inline = (C->do_inlining() || InlineAccessors); | |
442 | |
443 // --------------------- | |
444 inc_sp(- nargs); // Temporarily pop args for JVM state of call | |
445 JVMState* jvms = sync_jvms(); | |
446 | |
447 // --------------------- | |
448 // Decide call tactic. | |
449 // This call checks with CHA, the interpreter profile, intrinsics table, etc. | |
450 // It decides whether inlining is desirable or not. | |
451 CallGenerator* cg = C->call_generator(call_method, vtable_index, call_is_virtual, jvms, try_inline, prof_factor()); | |
452 | |
453 // --------------------- | |
454 // Round double arguments before call | |
455 round_double_arguments(dest_method); | |
456 | |
457 #ifndef PRODUCT | |
458 // bump global counters for calls | |
459 count_compiled_calls(false/*at_method_entry*/, cg->is_inline()); | |
460 | |
461 // Record first part of parsing work for this call | |
462 parse_histogram()->record_change(); | |
463 #endif // not PRODUCT | |
464 | |
465 assert(jvms == this->jvms(), "still operating on the right JVMS"); | |
466 assert(jvms_in_sync(), "jvms must carry full info into CG"); | |
467 | |
468 // save across call, for a subsequent cast_not_null. | |
469 Node* receiver = has_receiver ? argument(0) : NULL; | |
470 | |
471 // Bump method data counters (We profile *before* the call is made | |
472 // because exceptions don't return to the call site.) | |
473 profile_call(receiver); | |
474 | |
475 JVMState* new_jvms; | |
476 if ((new_jvms = cg->generate(jvms)) == NULL) { | |
477 // When inlining attempt fails (e.g., too many arguments), | |
478 // it may contaminate the current compile state, making it | |
479 // impossible to pull back and try again. Once we call | |
480 // cg->generate(), we are committed. If it fails, the whole | |
481 // compilation task is compromised. | |
482 if (failing()) return; | |
483 #ifndef PRODUCT | |
484 if (PrintOpto || PrintOptoInlining || PrintInlining) { | |
485 // Only one fall-back, so if an intrinsic fails, ignore any bytecodes. | |
486 if (cg->is_intrinsic() && call_method->code_size() > 0) { | |
487 tty->print("Bailed out of intrinsic, will not inline: "); | |
488 call_method->print_name(); tty->cr(); | |
489 } | |
490 } | |
491 #endif | |
492 // This can happen if a library intrinsic is available, but refuses | |
493 // the call site, perhaps because it did not match a pattern the | |
494 // intrinsic was expecting to optimize. The fallback position is | |
495 // to call out-of-line. | |
496 try_inline = false; // Inline tactic bailed out. | |
497 cg = C->call_generator(call_method, vtable_index, call_is_virtual, jvms, try_inline, prof_factor()); | |
498 if ((new_jvms = cg->generate(jvms)) == NULL) { | |
499 guarantee(failing(), "call failed to generate: calls should work"); | |
500 return; | |
501 } | |
502 } | |
503 | |
504 if (cg->is_inline()) { | |
67 | 505 // Accumulate has_loops estimate |
506 C->set_has_loops(C->has_loops() || call_method->has_loops()); | |
0 | 507 C->env()->notice_inlined_method(call_method); |
508 } | |
509 | |
510 // Reset parser state from [new_]jvms, which now carries results of the call. | |
511 // Return value (if any) is already pushed on the stack by the cg. | |
512 add_exception_states_from(new_jvms); | |
513 if (new_jvms->map()->control() == top()) { | |
514 stop_and_kill_map(); | |
515 } else { | |
516 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged"); | |
517 set_jvms(new_jvms); | |
518 } | |
519 | |
520 if (!stopped()) { | |
521 // This was some sort of virtual call, which did a null check for us. | |
522 // Now we can assert receiver-not-null, on the normal return path. | |
523 if (receiver != NULL && cg->is_virtual()) { | |
524 Node* cast = cast_not_null(receiver); | |
525 // %%% assert(receiver == cast, "should already have cast the receiver"); | |
526 } | |
527 | |
528 // Round double result after a call from strict to non-strict code | |
529 round_double_result(dest_method); | |
530 | |
531 // If the return type of the method is not loaded, assert that the | |
532 // value we got is a null. Otherwise, we need to recompile. | |
533 if (!dest_method->return_type()->is_loaded()) { | |
534 #ifndef PRODUCT | |
535 if (PrintOpto && (Verbose || WizardMode)) { | |
536 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci()); | |
537 dest_method->print_name(); tty->cr(); | |
538 } | |
539 #endif | |
540 if (C->log() != NULL) { | |
541 C->log()->elem("assert_null reason='return' klass='%d'", | |
542 C->log()->identify(dest_method->return_type())); | |
543 } | |
544 // If there is going to be a trap, put it at the next bytecode: | |
545 set_bci(iter().next_bci()); | |
546 do_null_assert(peek(), T_OBJECT); | |
547 set_bci(iter().cur_bci()); // put it back | |
548 } | |
549 } | |
550 | |
551 // Restart record of parsing work after possible inlining of call | |
552 #ifndef PRODUCT | |
553 parse_histogram()->set_initial_state(bc()); | |
554 #endif | |
555 } | |
556 | |
557 //---------------------------catch_call_exceptions----------------------------- | |
558 // Put a Catch and CatchProj nodes behind a just-created call. | |
559 // Send their caught exceptions to the proper handler. | |
560 // This may be used after a call to the rethrow VM stub, | |
561 // when it is needed to process unloaded exception classes. | |
562 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) { | |
563 // Exceptions are delivered through this channel: | |
564 Node* i_o = this->i_o(); | |
565 | |
566 // Add a CatchNode. | |
567 GrowableArray<int>* bcis = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, -1); | |
568 GrowableArray<const Type*>* extypes = new (C->node_arena()) GrowableArray<const Type*>(C->node_arena(), 8, 0, NULL); | |
569 GrowableArray<int>* saw_unloaded = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, 0); | |
570 | |
571 for (; !handlers.is_done(); handlers.next()) { | |
572 ciExceptionHandler* h = handlers.handler(); | |
573 int h_bci = h->handler_bci(); | |
574 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass(); | |
575 // Do not introduce unloaded exception types into the graph: | |
576 if (!h_klass->is_loaded()) { | |
577 if (saw_unloaded->contains(h_bci)) { | |
578 /* We've already seen an unloaded exception with h_bci, | |
579 so don't duplicate. Duplication will cause the CatchNode to be | |
580 unnecessarily large. See 4713716. */ | |
581 continue; | |
582 } else { | |
583 saw_unloaded->append(h_bci); | |
584 } | |
585 } | |
586 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass); | |
587 // (We use make_from_klass because it respects UseUniqueSubclasses.) | |
588 h_extype = h_extype->join(TypeInstPtr::NOTNULL); | |
589 assert(!h_extype->empty(), "sanity"); | |
590 // Note: It's OK if the BCIs repeat themselves. | |
591 bcis->append(h_bci); | |
592 extypes->append(h_extype); | |
593 } | |
594 | |
595 int len = bcis->length(); | |
596 CatchNode *cn = new (C, 2) CatchNode(control(), i_o, len+1); | |
597 Node *catch_ = _gvn.transform(cn); | |
598 | |
599 // now branch with the exception state to each of the (potential) | |
600 // handlers | |
601 for(int i=0; i < len; i++) { | |
602 // Setup JVM state to enter the handler. | |
603 PreserveJVMState pjvms(this); | |
604 // Locals are just copied from before the call. | |
605 // Get control from the CatchNode. | |
606 int handler_bci = bcis->at(i); | |
607 Node* ctrl = _gvn.transform( new (C, 1) CatchProjNode(catch_, i+1,handler_bci)); | |
608 // This handler cannot happen? | |
609 if (ctrl == top()) continue; | |
610 set_control(ctrl); | |
611 | |
612 // Create exception oop | |
613 const TypeInstPtr* extype = extypes->at(i)->is_instptr(); | |
614 Node *ex_oop = _gvn.transform(new (C, 2) CreateExNode(extypes->at(i), ctrl, i_o)); | |
615 | |
616 // Handle unloaded exception classes. | |
617 if (saw_unloaded->contains(handler_bci)) { | |
618 // An unloaded exception type is coming here. Do an uncommon trap. | |
619 #ifndef PRODUCT | |
620 // We do not expect the same handler bci to take both cold unloaded | |
621 // and hot loaded exceptions. But, watch for it. | |
622 if (extype->is_loaded()) { | |
623 tty->print_cr("Warning: Handler @%d takes mixed loaded/unloaded exceptions in "); | |
624 method()->print_name(); tty->cr(); | |
625 } else if (PrintOpto && (Verbose || WizardMode)) { | |
626 tty->print("Bailing out on unloaded exception type "); | |
627 extype->klass()->print_name(); | |
628 tty->print(" at bci:%d in ", bci()); | |
629 method()->print_name(); tty->cr(); | |
630 } | |
631 #endif | |
632 // Emit an uncommon trap instead of processing the block. | |
633 set_bci(handler_bci); | |
634 push_ex_oop(ex_oop); | |
635 uncommon_trap(Deoptimization::Reason_unloaded, | |
636 Deoptimization::Action_reinterpret, | |
637 extype->klass(), "!loaded exception"); | |
638 set_bci(iter().cur_bci()); // put it back | |
639 continue; | |
640 } | |
641 | |
642 // go to the exception handler | |
643 if (handler_bci < 0) { // merge with corresponding rethrow node | |
644 throw_to_exit(make_exception_state(ex_oop)); | |
645 } else { // Else jump to corresponding handle | |
646 push_ex_oop(ex_oop); // Clear stack and push just the oop. | |
647 merge_exception(handler_bci); | |
648 } | |
649 } | |
650 | |
651 // The first CatchProj is for the normal return. | |
652 // (Note: If this is a call to rethrow_Java, this node goes dead.) | |
653 set_control(_gvn.transform( new (C, 1) CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci))); | |
654 } | |
655 | |
656 | |
657 //----------------------------catch_inline_exceptions-------------------------- | |
658 // Handle all exceptions thrown by an inlined method or individual bytecode. | |
659 // Common case 1: we have no handler, so all exceptions merge right into | |
660 // the rethrow case. | |
661 // Case 2: we have some handlers, with loaded exception klasses that have | |
662 // no subklasses. We do a Deutsch-Shiffman style type-check on the incoming | |
663 // exception oop and branch to the handler directly. | |
664 // Case 3: We have some handlers with subklasses or are not loaded at | |
665 // compile-time. We have to call the runtime to resolve the exception. | |
666 // So we insert a RethrowCall and all the logic that goes with it. | |
667 void Parse::catch_inline_exceptions(SafePointNode* ex_map) { | |
668 // Caller is responsible for saving away the map for normal control flow! | |
669 assert(stopped(), "call set_map(NULL) first"); | |
670 assert(method()->has_exception_handlers(), "don't come here w/o work to do"); | |
671 | |
672 Node* ex_node = saved_ex_oop(ex_map); | |
673 if (ex_node == top()) { | |
674 // No action needed. | |
675 return; | |
676 } | |
677 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr(); | |
678 NOT_PRODUCT(if (ex_type==NULL) tty->print_cr("*** Exception not InstPtr")); | |
679 if (ex_type == NULL) | |
680 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr(); | |
681 | |
682 // determine potential exception handlers | |
683 ciExceptionHandlerStream handlers(method(), bci(), | |
684 ex_type->klass()->as_instance_klass(), | |
685 ex_type->klass_is_exact()); | |
686 | |
687 // Start executing from the given throw state. (Keep its stack, for now.) | |
688 // Get the exception oop as known at compile time. | |
689 ex_node = use_exception_state(ex_map); | |
690 | |
691 // Get the exception oop klass from its header | |
692 Node* ex_klass_node = NULL; | |
693 if (has_ex_handler() && !ex_type->klass_is_exact()) { | |
694 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes()); | |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
67
diff
changeset
|
695 ex_klass_node = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 696 |
697 // Compute the exception klass a little more cleverly. | |
698 // Obvious solution is to simple do a LoadKlass from the 'ex_node'. | |
699 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for | |
700 // each arm of the Phi. If I know something clever about the exceptions | |
701 // I'm loading the class from, I can replace the LoadKlass with the | |
702 // klass constant for the exception oop. | |
703 if( ex_node->is_Phi() ) { | |
704 ex_klass_node = new (C, ex_node->req()) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT ); | |
705 for( uint i = 1; i < ex_node->req(); i++ ) { | |
706 Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() ); | |
164
c436414a719e
6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents:
67
diff
changeset
|
707 Node* k = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 708 ex_klass_node->init_req( i, k ); |
709 } | |
710 _gvn.set_type(ex_klass_node, TypeKlassPtr::OBJECT); | |
711 | |
712 } | |
713 } | |
714 | |
715 // Scan the exception table for applicable handlers. | |
716 // If none, we can call rethrow() and be done! | |
717 // If precise (loaded with no subklasses), insert a D.S. style | |
718 // pointer compare to the correct handler and loop back. | |
719 // If imprecise, switch to the Rethrow VM-call style handling. | |
720 | |
721 int remaining = handlers.count_remaining(); | |
722 | |
723 // iterate through all entries sequentially | |
724 for (;!handlers.is_done(); handlers.next()) { | |
725 // Do nothing if turned off | |
726 if( !DeutschShiffmanExceptions ) break; | |
727 ciExceptionHandler* handler = handlers.handler(); | |
728 | |
729 if (handler->is_rethrow()) { | |
730 // If we fell off the end of the table without finding an imprecise | |
731 // exception klass (and without finding a generic handler) then we | |
732 // know this exception is not handled in this method. We just rethrow | |
733 // the exception into the caller. | |
734 throw_to_exit(make_exception_state(ex_node)); | |
735 return; | |
736 } | |
737 | |
738 // exception handler bci range covers throw_bci => investigate further | |
739 int handler_bci = handler->handler_bci(); | |
740 | |
741 if (remaining == 1) { | |
742 push_ex_oop(ex_node); // Push exception oop for handler | |
743 #ifndef PRODUCT | |
744 if (PrintOpto && WizardMode) { | |
745 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci); | |
746 } | |
747 #endif | |
748 merge_exception(handler_bci); // jump to handler | |
749 return; // No more handling to be done here! | |
750 } | |
751 | |
752 // %%% The following logic replicates make_from_klass_unique. | |
753 // TO DO: Replace by a subroutine call. Then generalize | |
754 // the type check, as noted in the next "%%%" comment. | |
755 | |
756 ciInstanceKlass* klass = handler->catch_klass(); | |
757 if (UseUniqueSubclasses) { | |
758 // (We use make_from_klass because it respects UseUniqueSubclasses.) | |
759 const TypeOopPtr* tp = TypeOopPtr::make_from_klass(klass); | |
760 klass = tp->klass()->as_instance_klass(); | |
761 } | |
762 | |
763 // Get the handler's klass | |
764 if (!klass->is_loaded()) // klass is not loaded? | |
765 break; // Must call Rethrow! | |
766 if (klass->is_interface()) // should not happen, but... | |
767 break; // bail out | |
768 // See if the loaded exception klass has no subtypes | |
769 if (klass->has_subklass()) | |
770 break; // Cannot easily do precise test ==> Rethrow | |
771 | |
772 // %%% Now that subclass checking is very fast, we need to rewrite | |
773 // this section and remove the option "DeutschShiffmanExceptions". | |
774 // The exception processing chain should be a normal typecase pattern, | |
775 // with a bailout to the interpreter only in the case of unloaded | |
776 // classes. (The bailout should mark the method non-entrant.) | |
777 // This rewrite should be placed in GraphKit::, not Parse::. | |
778 | |
779 // Add a dependence; if any subclass added we need to recompile | |
780 // %%% should use stronger assert_unique_concrete_subtype instead | |
781 if (!klass->is_final()) { | |
782 C->dependencies()->assert_leaf_type(klass); | |
783 } | |
784 | |
785 // Implement precise test | |
786 const TypeKlassPtr *tk = TypeKlassPtr::make(klass); | |
787 Node* con = _gvn.makecon(tk); | |
788 Node* cmp = _gvn.transform( new (C, 3) CmpPNode(ex_klass_node, con) ); | |
789 Node* bol = _gvn.transform( new (C, 2) BoolNode(cmp, BoolTest::ne) ); | |
790 { BuildCutout unless(this, bol, PROB_LIKELY(0.7f)); | |
791 const TypeInstPtr* tinst = TypeInstPtr::make_exact(TypePtr::NotNull, klass); | |
792 Node* ex_oop = _gvn.transform(new (C, 2) CheckCastPPNode(control(), ex_node, tinst)); | |
793 push_ex_oop(ex_oop); // Push exception oop for handler | |
794 #ifndef PRODUCT | |
795 if (PrintOpto && WizardMode) { | |
796 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci); | |
797 klass->print_name(); | |
798 tty->cr(); | |
799 } | |
800 #endif | |
801 merge_exception(handler_bci); | |
802 } | |
803 | |
804 // Come here if exception does not match handler. | |
805 // Carry on with more handler checks. | |
806 --remaining; | |
807 } | |
808 | |
809 assert(!stopped(), "you should return if you finish the chain"); | |
810 | |
811 if (remaining == 1) { | |
812 // Further checks do not matter. | |
813 } | |
814 | |
815 if (can_rerun_bytecode()) { | |
816 // Do not push_ex_oop here! | |
817 // Re-executing the bytecode will reproduce the throwing condition. | |
818 bool must_throw = true; | |
819 uncommon_trap(Deoptimization::Reason_unhandled, | |
820 Deoptimization::Action_none, | |
821 (ciKlass*)NULL, (const char*)NULL, // default args | |
822 must_throw); | |
823 return; | |
824 } | |
825 | |
826 // Oops, need to call into the VM to resolve the klasses at runtime. | |
827 // Note: This call must not deoptimize, since it is not a real at this bci! | |
828 kill_dead_locals(); | |
829 | |
830 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW, | |
831 OptoRuntime::rethrow_Type(), | |
832 OptoRuntime::rethrow_stub(), | |
833 NULL, NULL, | |
834 ex_node); | |
835 | |
836 // Rethrow is a pure call, no side effects, only a result. | |
837 // The result cannot be allocated, so we use I_O | |
838 | |
839 // Catch exceptions from the rethrow | |
840 catch_call_exceptions(handlers); | |
841 } | |
842 | |
843 | |
844 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.) | |
845 | |
846 | |
847 #ifndef PRODUCT | |
848 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) { | |
849 if( CountCompiledCalls ) { | |
850 if( at_method_entry ) { | |
851 // bump invocation counter if top method (for statistics) | |
852 if (CountCompiledCalls && depth() == 1) { | |
853 const TypeInstPtr* addr_type = TypeInstPtr::make(method()); | |
854 Node* adr1 = makecon(addr_type); | |
855 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(methodOopDesc::compiled_invocation_counter_offset())); | |
856 increment_counter(adr2); | |
857 } | |
858 } else if (is_inline) { | |
859 switch (bc()) { | |
860 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break; | |
861 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break; | |
862 case Bytecodes::_invokestatic: | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
367
diff
changeset
|
863 case Bytecodes::_invokedynamic: |
0 | 864 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break; |
865 default: fatal("unexpected call bytecode"); | |
866 } | |
867 } else { | |
868 switch (bc()) { | |
869 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break; | |
870 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break; | |
871 case Bytecodes::_invokestatic: | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
367
diff
changeset
|
872 case Bytecodes::_invokedynamic: |
0 | 873 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break; |
874 default: fatal("unexpected call bytecode"); | |
875 } | |
876 } | |
877 } | |
878 } | |
879 #endif //PRODUCT | |
880 | |
881 | |
882 // Identify possible target method and inlining style | |
883 ciMethod* Parse::optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass, | |
884 ciMethod *dest_method, const TypeOopPtr* receiver_type) { | |
885 // only use for virtual or interface calls | |
886 | |
887 // If it is obviously final, do not bother to call find_monomorphic_target, | |
888 // because the class hierarchy checks are not needed, and may fail due to | |
889 // incompletely loaded classes. Since we do our own class loading checks | |
890 // in this module, we may confidently bind to any method. | |
891 if (dest_method->can_be_statically_bound()) { | |
892 return dest_method; | |
893 } | |
894 | |
895 // Attempt to improve the receiver | |
896 bool actual_receiver_is_exact = false; | |
897 ciInstanceKlass* actual_receiver = klass; | |
898 if (receiver_type != NULL) { | |
899 // Array methods are all inherited from Object, and are monomorphic. | |
900 if (receiver_type->isa_aryptr() && | |
901 dest_method->holder() == env()->Object_klass()) { | |
902 return dest_method; | |
903 } | |
904 | |
905 // All other interesting cases are instance klasses. | |
906 if (!receiver_type->isa_instptr()) { | |
907 return NULL; | |
908 } | |
909 | |
910 ciInstanceKlass *ikl = receiver_type->klass()->as_instance_klass(); | |
911 if (ikl->is_loaded() && ikl->is_initialized() && !ikl->is_interface() && | |
367
194b8e3a2fc4
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
196
diff
changeset
|
912 (ikl == actual_receiver || ikl->is_subtype_of(actual_receiver))) { |
0 | 913 // ikl is a same or better type than the original actual_receiver, |
914 // e.g. static receiver from bytecodes. | |
915 actual_receiver = ikl; | |
916 // Is the actual_receiver exact? | |
917 actual_receiver_is_exact = receiver_type->klass_is_exact(); | |
918 } | |
919 } | |
920 | |
921 ciInstanceKlass* calling_klass = caller->holder(); | |
922 ciMethod* cha_monomorphic_target = dest_method->find_monomorphic_target(calling_klass, klass, actual_receiver); | |
923 if (cha_monomorphic_target != NULL) { | |
924 assert(!cha_monomorphic_target->is_abstract(), ""); | |
925 // Look at the method-receiver type. Does it add "too much information"? | |
926 ciKlass* mr_klass = cha_monomorphic_target->holder(); | |
927 const Type* mr_type = TypeInstPtr::make(TypePtr::BotPTR, mr_klass); | |
928 if (receiver_type == NULL || !receiver_type->higher_equal(mr_type)) { | |
929 // Calling this method would include an implicit cast to its holder. | |
930 // %%% Not yet implemented. Would throw minor asserts at present. | |
931 // %%% The most common wins are already gained by +UseUniqueSubclasses. | |
932 // To fix, put the higher_equal check at the call of this routine, | |
933 // and add a CheckCastPP to the receiver. | |
934 if (TraceDependencies) { | |
935 tty->print_cr("found unique CHA method, but could not cast up"); | |
936 tty->print(" method = "); | |
937 cha_monomorphic_target->print(); | |
938 tty->cr(); | |
939 } | |
940 if (C->log() != NULL) { | |
941 C->log()->elem("missed_CHA_opportunity klass='%d' method='%d'", | |
942 C->log()->identify(klass), | |
943 C->log()->identify(cha_monomorphic_target)); | |
944 } | |
945 cha_monomorphic_target = NULL; | |
946 } | |
947 } | |
948 if (cha_monomorphic_target != NULL) { | |
949 // Hardwiring a virtual. | |
950 // If we inlined because CHA revealed only a single target method, | |
951 // then we are dependent on that target method not getting overridden | |
952 // by dynamic class loading. Be sure to test the "static" receiver | |
953 // dest_method here, as opposed to the actual receiver, which may | |
954 // falsely lead us to believe that the receiver is final or private. | |
955 C->dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target); | |
956 return cha_monomorphic_target; | |
957 } | |
958 | |
959 // If the type is exact, we can still bind the method w/o a vcall. | |
960 // (This case comes after CHA so we can see how much extra work it does.) | |
961 if (actual_receiver_is_exact) { | |
962 // In case of evolution, there is a dependence on every inlined method, since each | |
963 // such method can be changed when its class is redefined. | |
964 ciMethod* exact_method = dest_method->resolve_invoke(calling_klass, actual_receiver); | |
965 if (exact_method != NULL) { | |
966 #ifndef PRODUCT | |
967 if (PrintOpto) { | |
968 tty->print(" Calling method via exact type @%d --- ", bci); | |
969 exact_method->print_name(); | |
970 tty->cr(); | |
971 } | |
972 #endif | |
973 return exact_method; | |
974 } | |
975 } | |
976 | |
977 return NULL; | |
978 } |