Mercurial > hg > truffle
annotate src/share/vm/opto/doCall.cpp @ 7447:1de1b145f6bc
8005486: NPG: Incorrect assertion in ChunkManager::list_index()
Reviewed-by: coleenp
author | jmasa |
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date | Wed, 26 Dec 2012 15:05:30 -0800 |
parents | ad5dd04754ee |
children | d092d1b31229 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "ci/ciCallSite.hpp" | |
27 #include "ci/ciMethodHandle.hpp" | |
28 #include "classfile/vmSymbols.hpp" | |
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29 #include "compiler/compileBroker.hpp" |
1972 | 30 #include "compiler/compileLog.hpp" |
31 #include "interpreter/linkResolver.hpp" | |
32 #include "opto/addnode.hpp" | |
33 #include "opto/callGenerator.hpp" | |
34 #include "opto/cfgnode.hpp" | |
35 #include "opto/mulnode.hpp" | |
36 #include "opto/parse.hpp" | |
37 #include "opto/rootnode.hpp" | |
38 #include "opto/runtime.hpp" | |
39 #include "opto/subnode.hpp" | |
40 #include "prims/nativeLookup.hpp" | |
41 #include "runtime/sharedRuntime.hpp" | |
0 | 42 |
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43 void trace_type_profile(Compile* C, ciMethod *method, int depth, int bci, ciMethod *prof_method, ciKlass *prof_klass, int site_count, int receiver_count) { |
6793 | 44 if (TraceTypeProfile || PrintInlining NOT_PRODUCT(|| PrintOptoInlining)) { |
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45 outputStream* out = tty; |
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46 if (!PrintInlining) { |
6793 | 47 if (NOT_PRODUCT(!PrintOpto &&) !PrintCompilation) { |
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48 method->print_short_name(); |
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49 tty->cr(); |
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50 } |
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51 CompileTask::print_inlining(prof_method, depth, bci); |
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52 } else { |
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53 out = C->print_inlining_stream(); |
0 | 54 } |
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55 CompileTask::print_inline_indent(depth, out); |
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56 out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count); |
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57 stringStream ss; |
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58 prof_klass->name()->print_symbol_on(&ss); |
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59 out->print(ss.as_string()); |
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60 out->cr(); |
0 | 61 } |
62 } | |
63 | |
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64 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_is_virtual, |
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65 JVMState* jvms, bool allow_inline, |
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66 float prof_factor, bool allow_intrinsics) { |
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67 ciMethod* caller = jvms->method(); |
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68 int bci = jvms->bci(); |
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69 Bytecodes::Code bytecode = caller->java_code_at_bci(bci); |
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70 guarantee(callee != NULL, "failed method resolution"); |
0 | 71 |
72 // Dtrace currently doesn't work unless all calls are vanilla | |
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73 if (env()->dtrace_method_probes()) { |
0 | 74 allow_inline = false; |
75 } | |
76 | |
77 // Note: When we get profiling during stage-1 compiles, we want to pull | |
78 // from more specific profile data which pertains to this inlining. | |
79 // Right now, ignore the information in jvms->caller(), and do method[bci]. | |
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80 ciCallProfile profile = caller->call_profile_at_bci(bci); |
0 | 81 |
82 // See how many times this site has been invoked. | |
83 int site_count = profile.count(); | |
84 int receiver_count = -1; | |
85 if (call_is_virtual && UseTypeProfile && profile.has_receiver(0)) { | |
86 // Receivers in the profile structure are ordered by call counts | |
87 // so that the most called (major) receiver is profile.receiver(0). | |
88 receiver_count = profile.receiver_count(0); | |
89 } | |
90 | |
91 CompileLog* log = this->log(); | |
92 if (log != NULL) { | |
93 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1; | |
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94 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1; |
0 | 95 log->begin_elem("call method='%d' count='%d' prof_factor='%g'", |
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96 log->identify(callee), site_count, prof_factor); |
0 | 97 if (call_is_virtual) log->print(" virtual='1'"); |
98 if (allow_inline) log->print(" inline='1'"); | |
99 if (receiver_count >= 0) { | |
100 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count); | |
101 if (profile.has_receiver(1)) { | |
102 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1)); | |
103 } | |
104 } | |
105 log->end_elem(); | |
106 } | |
107 | |
108 // Special case the handling of certain common, profitable library | |
109 // methods. If these methods are replaced with specialized code, | |
110 // then we return it as the inlined version of the call. | |
111 // We do this before the strict f.p. check below because the | |
112 // intrinsics handle strict f.p. correctly. | |
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113 if (allow_inline && allow_intrinsics) { |
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114 CallGenerator* cg = find_intrinsic(callee, call_is_virtual); |
6894 | 115 if (cg != NULL) { |
116 if (cg->is_predicted()) { | |
117 // Code without intrinsic but, hopefully, inlined. | |
118 CallGenerator* inline_cg = this->call_generator(callee, | |
119 vtable_index, call_is_virtual, jvms, allow_inline, prof_factor, false); | |
120 if (inline_cg != NULL) { | |
121 cg = CallGenerator::for_predicted_intrinsic(cg, inline_cg); | |
122 } | |
123 } | |
124 return cg; | |
125 } | |
0 | 126 } |
127 | |
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128 // Do method handle calls. |
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129 // NOTE: This must happen before normal inlining logic below since |
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130 // MethodHandle.invoke* are native methods which obviously don't |
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131 // have bytecodes and so normal inlining fails. |
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132 if (callee->is_method_handle_intrinsic()) { |
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133 return CallGenerator::for_method_handle_call(jvms, caller, callee); |
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134 } |
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135 |
0 | 136 // Do not inline strict fp into non-strict code, or the reverse |
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137 if (caller->is_strict() ^ callee->is_strict()) { |
0 | 138 allow_inline = false; |
139 } | |
140 | |
141 // Attempt to inline... | |
142 if (allow_inline) { | |
143 // The profile data is only partly attributable to this caller, | |
144 // scale back the call site information. | |
145 float past_uses = jvms->method()->scale_count(site_count, prof_factor); | |
146 // This is the number of times we expect the call code to be used. | |
147 float expected_uses = past_uses; | |
148 | |
149 // Try inlining a bytecoded method: | |
150 if (!call_is_virtual) { | |
151 InlineTree* ilt; | |
152 if (UseOldInlining) { | |
153 ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method()); | |
154 } else { | |
155 // Make a disembodied, stateless ILT. | |
156 // TO DO: When UseOldInlining is removed, copy the ILT code elsewhere. | |
157 float site_invoke_ratio = prof_factor; | |
158 // Note: ilt is for the root of this parse, not the present call site. | |
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159 ilt = new InlineTree(this, jvms->method(), jvms->caller(), site_invoke_ratio, MaxInlineLevel); |
0 | 160 } |
161 WarmCallInfo scratch_ci; | |
162 if (!UseOldInlining) | |
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163 scratch_ci.init(jvms, callee, profile, prof_factor); |
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164 WarmCallInfo* ci = ilt->ok_to_inline(callee, jvms, profile, &scratch_ci); |
0 | 165 assert(ci != &scratch_ci, "do not let this pointer escape"); |
166 bool allow_inline = (ci != NULL && !ci->is_cold()); | |
167 bool require_inline = (allow_inline && ci->is_hot()); | |
168 | |
169 if (allow_inline) { | |
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170 CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses); |
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171 if (require_inline && cg != NULL && should_delay_inlining(callee, jvms)) { |
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172 // Delay the inlining of this method to give us the |
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173 // opportunity to perform some high level optimizations |
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174 // first. |
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175 return CallGenerator::for_late_inline(callee, cg); |
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176 } |
0 | 177 if (cg == NULL) { |
178 // Fall through. | |
179 } else if (require_inline || !InlineWarmCalls) { | |
180 return cg; | |
181 } else { | |
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182 CallGenerator* cold_cg = call_generator(callee, vtable_index, call_is_virtual, jvms, false, prof_factor); |
0 | 183 return CallGenerator::for_warm_call(ci, cold_cg, cg); |
184 } | |
185 } | |
186 } | |
187 | |
188 // Try using the type profile. | |
189 if (call_is_virtual && site_count > 0 && receiver_count > 0) { | |
190 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count. | |
191 bool have_major_receiver = (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent); | |
192 ciMethod* receiver_method = NULL; | |
193 if (have_major_receiver || profile.morphism() == 1 || | |
194 (profile.morphism() == 2 && UseBimorphicInlining)) { | |
195 // receiver_method = profile.method(); | |
196 // Profiles do not suggest methods now. Look it up in the major receiver. | |
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197 receiver_method = callee->resolve_invoke(jvms->method()->holder(), |
0 | 198 profile.receiver(0)); |
199 } | |
200 if (receiver_method != NULL) { | |
201 // The single majority receiver sufficiently outweighs the minority. | |
202 CallGenerator* hit_cg = this->call_generator(receiver_method, | |
203 vtable_index, !call_is_virtual, jvms, allow_inline, prof_factor); | |
204 if (hit_cg != NULL) { | |
205 // Look up second receiver. | |
206 CallGenerator* next_hit_cg = NULL; | |
207 ciMethod* next_receiver_method = NULL; | |
208 if (profile.morphism() == 2 && UseBimorphicInlining) { | |
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209 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(), |
0 | 210 profile.receiver(1)); |
211 if (next_receiver_method != NULL) { | |
212 next_hit_cg = this->call_generator(next_receiver_method, | |
213 vtable_index, !call_is_virtual, jvms, | |
214 allow_inline, prof_factor); | |
215 if (next_hit_cg != NULL && !next_hit_cg->is_inline() && | |
216 have_major_receiver && UseOnlyInlinedBimorphic) { | |
217 // Skip if we can't inline second receiver's method | |
218 next_hit_cg = NULL; | |
219 } | |
220 } | |
221 } | |
222 CallGenerator* miss_cg; | |
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223 Deoptimization::DeoptReason reason = (profile.morphism() == 2) ? |
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224 Deoptimization::Reason_bimorphic : |
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225 Deoptimization::Reason_class_check; |
0 | 226 if (( profile.morphism() == 1 || |
227 (profile.morphism() == 2 && next_hit_cg != NULL) ) && | |
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228 !too_many_traps(jvms->method(), jvms->bci(), reason) |
0 | 229 ) { |
230 // Generate uncommon trap for class check failure path | |
231 // in case of monomorphic or bimorphic virtual call site. | |
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232 miss_cg = CallGenerator::for_uncommon_trap(callee, reason, |
0 | 233 Deoptimization::Action_maybe_recompile); |
234 } else { | |
235 // Generate virtual call for class check failure path | |
236 // in case of polymorphic virtual call site. | |
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237 miss_cg = CallGenerator::for_virtual_call(callee, vtable_index); |
0 | 238 } |
239 if (miss_cg != NULL) { | |
240 if (next_hit_cg != NULL) { | |
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241 trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1)); |
0 | 242 // We don't need to record dependency on a receiver here and below. |
243 // Whenever we inline, the dependency is added by Parse::Parse(). | |
244 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX); | |
245 } | |
246 if (miss_cg != NULL) { | |
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247 trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), receiver_method, profile.receiver(0), site_count, receiver_count); |
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248 CallGenerator* cg = CallGenerator::for_predicted_call(profile.receiver(0), miss_cg, hit_cg, profile.receiver_prob(0)); |
0 | 249 if (cg != NULL) return cg; |
250 } | |
251 } | |
252 } | |
253 } | |
254 } | |
255 } | |
256 | |
257 // There was no special inlining tactic, or it bailed out. | |
258 // Use a more generic tactic, like a simple call. | |
259 if (call_is_virtual) { | |
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260 return CallGenerator::for_virtual_call(callee, vtable_index); |
0 | 261 } else { |
262 // Class Hierarchy Analysis or Type Profile reveals a unique target, | |
263 // or it is a static or special call. | |
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264 return CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms)); |
0 | 265 } |
266 } | |
267 | |
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268 // Return true for methods that shouldn't be inlined early so that |
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269 // they are easier to analyze and optimize as intrinsics. |
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270 bool Compile::should_delay_inlining(ciMethod* call_method, JVMState* jvms) { |
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271 if (has_stringbuilder()) { |
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272 |
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273 if ((call_method->holder() == C->env()->StringBuilder_klass() || |
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274 call_method->holder() == C->env()->StringBuffer_klass()) && |
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275 (jvms->method()->holder() == C->env()->StringBuilder_klass() || |
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276 jvms->method()->holder() == C->env()->StringBuffer_klass())) { |
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277 // Delay SB calls only when called from non-SB code |
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278 return false; |
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279 } |
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280 |
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281 switch (call_method->intrinsic_id()) { |
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282 case vmIntrinsics::_StringBuilder_void: |
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283 case vmIntrinsics::_StringBuilder_int: |
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284 case vmIntrinsics::_StringBuilder_String: |
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285 case vmIntrinsics::_StringBuilder_append_char: |
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286 case vmIntrinsics::_StringBuilder_append_int: |
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287 case vmIntrinsics::_StringBuilder_append_String: |
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288 case vmIntrinsics::_StringBuilder_toString: |
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289 case vmIntrinsics::_StringBuffer_void: |
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290 case vmIntrinsics::_StringBuffer_int: |
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291 case vmIntrinsics::_StringBuffer_String: |
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292 case vmIntrinsics::_StringBuffer_append_char: |
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293 case vmIntrinsics::_StringBuffer_append_int: |
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294 case vmIntrinsics::_StringBuffer_append_String: |
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295 case vmIntrinsics::_StringBuffer_toString: |
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296 case vmIntrinsics::_Integer_toString: |
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297 return true; |
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298 |
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299 case vmIntrinsics::_String_String: |
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300 { |
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301 Node* receiver = jvms->map()->in(jvms->argoff() + 1); |
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302 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) { |
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303 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava(); |
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304 ciMethod* m = csj->method(); |
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305 if (m != NULL && |
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306 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString || |
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307 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString)) |
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308 // Delay String.<init>(new SB()) |
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309 return true; |
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310 } |
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311 return false; |
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312 } |
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313 |
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314 default: |
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315 return false; |
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316 } |
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317 } |
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318 return false; |
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319 } |
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320 |
0 | 321 |
322 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link | |
323 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) { | |
324 // Additional inputs to consider... | |
325 // bc = bc() | |
326 // caller = method() | |
327 // iter().get_method_holder_index() | |
328 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" ); | |
329 // Interface classes can be loaded & linked and never get around to | |
330 // being initialized. Uncommon-trap for not-initialized static or | |
331 // v-calls. Let interface calls happen. | |
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332 ciInstanceKlass* holder_klass = dest_method->holder(); |
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333 if (!holder_klass->is_being_initialized() && |
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334 !holder_klass->is_initialized() && |
0 | 335 !holder_klass->is_interface()) { |
336 uncommon_trap(Deoptimization::Reason_uninitialized, | |
337 Deoptimization::Action_reinterpret, | |
338 holder_klass); | |
339 return true; | |
340 } | |
341 | |
6973 | 342 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility"); |
0 | 343 return false; |
344 } | |
345 | |
346 | |
347 //------------------------------do_call---------------------------------------- | |
348 // Handle your basic call. Inline if we can & want to, else just setup call. | |
349 void Parse::do_call() { | |
350 // It's likely we are going to add debug info soon. | |
351 // Also, if we inline a guy who eventually needs debug info for this JVMS, | |
352 // our contribution to it is cleaned up right here. | |
353 kill_dead_locals(); | |
354 | |
355 // Set frequently used booleans | |
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356 const bool is_virtual = bc() == Bytecodes::_invokevirtual; |
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357 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface; |
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358 const bool has_receiver = Bytecodes::has_receiver(bc()); |
0 | 359 |
360 // Find target being called | |
361 bool will_link; | |
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362 ciSignature* declared_signature = NULL; |
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363 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode |
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364 ciInstanceKlass* holder_klass = orig_callee->holder(); |
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365 ciKlass* holder = iter().get_declared_method_holder(); |
0 | 366 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder); |
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367 assert(declared_signature != NULL, "cannot be null"); |
0 | 368 |
369 // uncommon-trap when callee is unloaded, uninitialized or will not link | |
370 // bailout when too many arguments for register representation | |
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371 if (!will_link || can_not_compile_call_site(orig_callee, klass)) { |
0 | 372 #ifndef PRODUCT |
373 if (PrintOpto && (Verbose || WizardMode)) { | |
374 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci()); | |
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375 orig_callee->print_name(); tty->cr(); |
0 | 376 } |
377 #endif | |
378 return; | |
379 } | |
380 assert(holder_klass->is_loaded(), ""); | |
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381 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw) |
0 | 382 // Note: this takes into account invokeinterface of methods declared in java/lang/Object, |
383 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces | |
384 assert(holder_klass->is_interface() || holder_klass->super() == NULL || (bc() != Bytecodes::_invokeinterface), "must match bc"); | |
385 // Note: In the absence of miranda methods, an abstract class K can perform | |
386 // an invokevirtual directly on an interface method I.m if K implements I. | |
387 | |
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388 // orig_callee is the resolved callee which's signature includes the |
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389 // appendix argument. |
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390 const int nargs = orig_callee->arg_size(); |
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391 |
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392 // Push appendix argument (MethodType, CallSite, etc.), if one. |
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393 if (iter().has_appendix()) { |
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394 ciObject* appendix_arg = iter().get_appendix(); |
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395 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg); |
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396 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type); |
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397 push(appendix_arg_node); |
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398 } |
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399 |
0 | 400 // --------------------- |
401 // Does Class Hierarchy Analysis reveal only a single target of a v-call? | |
402 // Then we may inline or make a static call, but become dependent on there being only 1 target. | |
403 // Does the call-site type profile reveal only one receiver? | |
404 // Then we may introduce a run-time check and inline on the path where it succeeds. | |
405 // The other path may uncommon_trap, check for another receiver, or do a v-call. | |
406 | |
407 // Choose call strategy. | |
408 bool call_is_virtual = is_virtual_or_interface; | |
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409 int vtable_index = Method::invalid_vtable_index; |
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410 ciMethod* callee = orig_callee; |
0 | 411 |
412 // Try to get the most accurate receiver type | |
413 if (is_virtual_or_interface) { | |
414 Node* receiver_node = stack(sp() - nargs); | |
415 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr(); | |
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416 ciMethod* optimized_virtual_method = optimize_inlining(method(), bci(), klass, orig_callee, receiver_type); |
0 | 417 |
418 // Have the call been sufficiently improved such that it is no longer a virtual? | |
419 if (optimized_virtual_method != NULL) { | |
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420 callee = optimized_virtual_method; |
0 | 421 call_is_virtual = false; |
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422 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) { |
0 | 423 // We can make a vtable call at this site |
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424 vtable_index = callee->resolve_vtable_index(method()->holder(), klass); |
0 | 425 } |
426 } | |
427 | |
428 // Note: It's OK to try to inline a virtual call. | |
429 // The call generator will not attempt to inline a polymorphic call | |
430 // unless it knows how to optimize the receiver dispatch. | |
431 bool try_inline = (C->do_inlining() || InlineAccessors); | |
432 | |
433 // --------------------- | |
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434 dec_sp(nargs); // Temporarily pop args for JVM state of call |
0 | 435 JVMState* jvms = sync_jvms(); |
436 | |
437 // --------------------- | |
438 // Decide call tactic. | |
439 // This call checks with CHA, the interpreter profile, intrinsics table, etc. | |
440 // It decides whether inlining is desirable or not. | |
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441 CallGenerator* cg = C->call_generator(callee, vtable_index, call_is_virtual, jvms, try_inline, prof_factor()); |
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442 |
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443 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead. |
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444 orig_callee = callee = NULL; |
0 | 445 |
446 // --------------------- | |
447 // Round double arguments before call | |
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448 round_double_arguments(cg->method()); |
0 | 449 |
450 #ifndef PRODUCT | |
451 // bump global counters for calls | |
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452 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline()); |
0 | 453 |
454 // Record first part of parsing work for this call | |
455 parse_histogram()->record_change(); | |
456 #endif // not PRODUCT | |
457 | |
458 assert(jvms == this->jvms(), "still operating on the right JVMS"); | |
459 assert(jvms_in_sync(), "jvms must carry full info into CG"); | |
460 | |
461 // save across call, for a subsequent cast_not_null. | |
462 Node* receiver = has_receiver ? argument(0) : NULL; | |
463 | |
464 // Bump method data counters (We profile *before* the call is made | |
465 // because exceptions don't return to the call site.) | |
466 profile_call(receiver); | |
467 | |
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468 JVMState* new_jvms = cg->generate(jvms); |
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469 if (new_jvms == NULL) { |
0 | 470 // When inlining attempt fails (e.g., too many arguments), |
471 // it may contaminate the current compile state, making it | |
472 // impossible to pull back and try again. Once we call | |
473 // cg->generate(), we are committed. If it fails, the whole | |
474 // compilation task is compromised. | |
475 if (failing()) return; | |
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476 |
0 | 477 // This can happen if a library intrinsic is available, but refuses |
478 // the call site, perhaps because it did not match a pattern the | |
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479 // intrinsic was expecting to optimize. Should always be possible to |
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480 // get a normal java call that may inline in that case |
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481 cg = C->call_generator(cg->method(), vtable_index, call_is_virtual, jvms, try_inline, prof_factor(), /* allow_intrinsics= */ false); |
0 | 482 if ((new_jvms = cg->generate(jvms)) == NULL) { |
483 guarantee(failing(), "call failed to generate: calls should work"); | |
484 return; | |
485 } | |
486 } | |
487 | |
488 if (cg->is_inline()) { | |
67 | 489 // Accumulate has_loops estimate |
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490 C->set_has_loops(C->has_loops() || cg->method()->has_loops()); |
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491 C->env()->notice_inlined_method(cg->method()); |
0 | 492 } |
493 | |
494 // Reset parser state from [new_]jvms, which now carries results of the call. | |
495 // Return value (if any) is already pushed on the stack by the cg. | |
496 add_exception_states_from(new_jvms); | |
497 if (new_jvms->map()->control() == top()) { | |
498 stop_and_kill_map(); | |
499 } else { | |
500 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged"); | |
501 set_jvms(new_jvms); | |
502 } | |
503 | |
504 if (!stopped()) { | |
505 // This was some sort of virtual call, which did a null check for us. | |
506 // Now we can assert receiver-not-null, on the normal return path. | |
507 if (receiver != NULL && cg->is_virtual()) { | |
508 Node* cast = cast_not_null(receiver); | |
509 // %%% assert(receiver == cast, "should already have cast the receiver"); | |
510 } | |
511 | |
512 // Round double result after a call from strict to non-strict code | |
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513 round_double_result(cg->method()); |
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514 |
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515 ciType* rtype = cg->method()->return_type(); |
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516 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw())) { |
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517 // Be careful here with return types. |
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518 ciType* ctype = declared_signature->return_type(); |
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519 if (ctype != rtype) { |
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520 BasicType rt = rtype->basic_type(); |
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521 BasicType ct = ctype->basic_type(); |
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522 Node* retnode = peek(); |
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523 if (ct == T_VOID) { |
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524 // It's OK for a method to return a value that is discarded. |
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525 // The discarding does not require any special action from the caller. |
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526 // The Java code knows this, at VerifyType.isNullConversion. |
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527 pop_node(rt); // whatever it was, pop it |
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528 retnode = top(); |
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529 } else if (rt == T_INT || is_subword_type(rt)) { |
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530 // FIXME: This logic should be factored out. |
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531 if (ct == T_BOOLEAN) { |
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532 retnode = _gvn.transform( new (C) AndINode(retnode, intcon(0x1)) ); |
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533 } else if (ct == T_CHAR) { |
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534 retnode = _gvn.transform( new (C) AndINode(retnode, intcon(0xFFFF)) ); |
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535 } else if (ct == T_BYTE) { |
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536 retnode = _gvn.transform( new (C) LShiftINode(retnode, intcon(24)) ); |
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537 retnode = _gvn.transform( new (C) RShiftINode(retnode, intcon(24)) ); |
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538 } else if (ct == T_SHORT) { |
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539 retnode = _gvn.transform( new (C) LShiftINode(retnode, intcon(16)) ); |
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540 retnode = _gvn.transform( new (C) RShiftINode(retnode, intcon(16)) ); |
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541 } else { |
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542 assert(ct == T_INT, err_msg_res("rt=%s, ct=%s", type2name(rt), type2name(ct))); |
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543 } |
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544 } else if (rt == T_OBJECT || rt == T_ARRAY) { |
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545 assert(ct == T_OBJECT || ct == T_ARRAY, err_msg_res("rt=%s, ct=%s", type2name(rt), type2name(ct))); |
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546 if (ctype->is_loaded()) { |
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547 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass()); |
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548 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass()); |
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549 if (arg_type != NULL && !arg_type->higher_equal(sig_type)) { |
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550 Node* cast_obj = _gvn.transform(new (C) CheckCastPPNode(control(), retnode, sig_type)); |
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551 pop(); |
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552 push(cast_obj); |
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553 } |
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554 } |
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555 } else { |
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556 assert(ct == rt, err_msg("unexpected mismatch rt=%d, ct=%d", rt, ct)); |
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557 // push a zero; it's better than getting an oop/int mismatch |
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558 retnode = pop_node(rt); |
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559 retnode = zerocon(ct); |
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560 push_node(ct, retnode); |
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561 } |
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562 // Now that the value is well-behaved, continue with the call-site type. |
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563 rtype = ctype; |
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564 } |
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565 } |
0 | 566 |
567 // If the return type of the method is not loaded, assert that the | |
568 // value we got is a null. Otherwise, we need to recompile. | |
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569 if (!rtype->is_loaded()) { |
0 | 570 #ifndef PRODUCT |
571 if (PrintOpto && (Verbose || WizardMode)) { | |
572 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci()); | |
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573 cg->method()->print_name(); tty->cr(); |
0 | 574 } |
575 #endif | |
576 if (C->log() != NULL) { | |
577 C->log()->elem("assert_null reason='return' klass='%d'", | |
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578 C->log()->identify(rtype)); |
0 | 579 } |
580 // If there is going to be a trap, put it at the next bytecode: | |
581 set_bci(iter().next_bci()); | |
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582 null_assert(peek()); |
0 | 583 set_bci(iter().cur_bci()); // put it back |
584 } | |
585 } | |
586 | |
587 // Restart record of parsing work after possible inlining of call | |
588 #ifndef PRODUCT | |
589 parse_histogram()->set_initial_state(bc()); | |
590 #endif | |
591 } | |
592 | |
593 //---------------------------catch_call_exceptions----------------------------- | |
594 // Put a Catch and CatchProj nodes behind a just-created call. | |
595 // Send their caught exceptions to the proper handler. | |
596 // This may be used after a call to the rethrow VM stub, | |
597 // when it is needed to process unloaded exception classes. | |
598 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) { | |
599 // Exceptions are delivered through this channel: | |
600 Node* i_o = this->i_o(); | |
601 | |
602 // Add a CatchNode. | |
603 GrowableArray<int>* bcis = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, -1); | |
604 GrowableArray<const Type*>* extypes = new (C->node_arena()) GrowableArray<const Type*>(C->node_arena(), 8, 0, NULL); | |
605 GrowableArray<int>* saw_unloaded = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, 0); | |
606 | |
607 for (; !handlers.is_done(); handlers.next()) { | |
608 ciExceptionHandler* h = handlers.handler(); | |
609 int h_bci = h->handler_bci(); | |
610 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass(); | |
611 // Do not introduce unloaded exception types into the graph: | |
612 if (!h_klass->is_loaded()) { | |
613 if (saw_unloaded->contains(h_bci)) { | |
614 /* We've already seen an unloaded exception with h_bci, | |
615 so don't duplicate. Duplication will cause the CatchNode to be | |
616 unnecessarily large. See 4713716. */ | |
617 continue; | |
618 } else { | |
619 saw_unloaded->append(h_bci); | |
620 } | |
621 } | |
622 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass); | |
623 // (We use make_from_klass because it respects UseUniqueSubclasses.) | |
624 h_extype = h_extype->join(TypeInstPtr::NOTNULL); | |
625 assert(!h_extype->empty(), "sanity"); | |
626 // Note: It's OK if the BCIs repeat themselves. | |
627 bcis->append(h_bci); | |
628 extypes->append(h_extype); | |
629 } | |
630 | |
631 int len = bcis->length(); | |
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632 CatchNode *cn = new (C) CatchNode(control(), i_o, len+1); |
0 | 633 Node *catch_ = _gvn.transform(cn); |
634 | |
635 // now branch with the exception state to each of the (potential) | |
636 // handlers | |
637 for(int i=0; i < len; i++) { | |
638 // Setup JVM state to enter the handler. | |
639 PreserveJVMState pjvms(this); | |
640 // Locals are just copied from before the call. | |
641 // Get control from the CatchNode. | |
642 int handler_bci = bcis->at(i); | |
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643 Node* ctrl = _gvn.transform( new (C) CatchProjNode(catch_, i+1,handler_bci)); |
0 | 644 // This handler cannot happen? |
645 if (ctrl == top()) continue; | |
646 set_control(ctrl); | |
647 | |
648 // Create exception oop | |
649 const TypeInstPtr* extype = extypes->at(i)->is_instptr(); | |
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650 Node *ex_oop = _gvn.transform(new (C) CreateExNode(extypes->at(i), ctrl, i_o)); |
0 | 651 |
652 // Handle unloaded exception classes. | |
653 if (saw_unloaded->contains(handler_bci)) { | |
654 // An unloaded exception type is coming here. Do an uncommon trap. | |
655 #ifndef PRODUCT | |
656 // We do not expect the same handler bci to take both cold unloaded | |
657 // and hot loaded exceptions. But, watch for it. | |
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658 if ((Verbose || WizardMode) && extype->is_loaded()) { |
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659 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci()); |
0 | 660 method()->print_name(); tty->cr(); |
661 } else if (PrintOpto && (Verbose || WizardMode)) { | |
662 tty->print("Bailing out on unloaded exception type "); | |
663 extype->klass()->print_name(); | |
664 tty->print(" at bci:%d in ", bci()); | |
665 method()->print_name(); tty->cr(); | |
666 } | |
667 #endif | |
668 // Emit an uncommon trap instead of processing the block. | |
669 set_bci(handler_bci); | |
670 push_ex_oop(ex_oop); | |
671 uncommon_trap(Deoptimization::Reason_unloaded, | |
672 Deoptimization::Action_reinterpret, | |
673 extype->klass(), "!loaded exception"); | |
674 set_bci(iter().cur_bci()); // put it back | |
675 continue; | |
676 } | |
677 | |
678 // go to the exception handler | |
679 if (handler_bci < 0) { // merge with corresponding rethrow node | |
680 throw_to_exit(make_exception_state(ex_oop)); | |
681 } else { // Else jump to corresponding handle | |
682 push_ex_oop(ex_oop); // Clear stack and push just the oop. | |
683 merge_exception(handler_bci); | |
684 } | |
685 } | |
686 | |
687 // The first CatchProj is for the normal return. | |
688 // (Note: If this is a call to rethrow_Java, this node goes dead.) | |
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689 set_control(_gvn.transform( new (C) CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci))); |
0 | 690 } |
691 | |
692 | |
693 //----------------------------catch_inline_exceptions-------------------------- | |
694 // Handle all exceptions thrown by an inlined method or individual bytecode. | |
695 // Common case 1: we have no handler, so all exceptions merge right into | |
696 // the rethrow case. | |
697 // Case 2: we have some handlers, with loaded exception klasses that have | |
698 // no subklasses. We do a Deutsch-Shiffman style type-check on the incoming | |
699 // exception oop and branch to the handler directly. | |
700 // Case 3: We have some handlers with subklasses or are not loaded at | |
701 // compile-time. We have to call the runtime to resolve the exception. | |
702 // So we insert a RethrowCall and all the logic that goes with it. | |
703 void Parse::catch_inline_exceptions(SafePointNode* ex_map) { | |
704 // Caller is responsible for saving away the map for normal control flow! | |
705 assert(stopped(), "call set_map(NULL) first"); | |
706 assert(method()->has_exception_handlers(), "don't come here w/o work to do"); | |
707 | |
708 Node* ex_node = saved_ex_oop(ex_map); | |
709 if (ex_node == top()) { | |
710 // No action needed. | |
711 return; | |
712 } | |
713 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr(); | |
714 NOT_PRODUCT(if (ex_type==NULL) tty->print_cr("*** Exception not InstPtr")); | |
715 if (ex_type == NULL) | |
716 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr(); | |
717 | |
718 // determine potential exception handlers | |
719 ciExceptionHandlerStream handlers(method(), bci(), | |
720 ex_type->klass()->as_instance_klass(), | |
721 ex_type->klass_is_exact()); | |
722 | |
723 // Start executing from the given throw state. (Keep its stack, for now.) | |
724 // Get the exception oop as known at compile time. | |
725 ex_node = use_exception_state(ex_map); | |
726 | |
727 // Get the exception oop klass from its header | |
728 Node* ex_klass_node = NULL; | |
729 if (has_ex_handler() && !ex_type->klass_is_exact()) { | |
730 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes()); | |
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731 ex_klass_node = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 732 |
733 // Compute the exception klass a little more cleverly. | |
734 // Obvious solution is to simple do a LoadKlass from the 'ex_node'. | |
735 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for | |
736 // each arm of the Phi. If I know something clever about the exceptions | |
737 // I'm loading the class from, I can replace the LoadKlass with the | |
738 // klass constant for the exception oop. | |
739 if( ex_node->is_Phi() ) { | |
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740 ex_klass_node = new (C) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT ); |
0 | 741 for( uint i = 1; i < ex_node->req(); i++ ) { |
742 Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() ); | |
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743 Node* k = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 744 ex_klass_node->init_req( i, k ); |
745 } | |
746 _gvn.set_type(ex_klass_node, TypeKlassPtr::OBJECT); | |
747 | |
748 } | |
749 } | |
750 | |
751 // Scan the exception table for applicable handlers. | |
752 // If none, we can call rethrow() and be done! | |
753 // If precise (loaded with no subklasses), insert a D.S. style | |
754 // pointer compare to the correct handler and loop back. | |
755 // If imprecise, switch to the Rethrow VM-call style handling. | |
756 | |
757 int remaining = handlers.count_remaining(); | |
758 | |
759 // iterate through all entries sequentially | |
760 for (;!handlers.is_done(); handlers.next()) { | |
761 ciExceptionHandler* handler = handlers.handler(); | |
762 | |
763 if (handler->is_rethrow()) { | |
764 // If we fell off the end of the table without finding an imprecise | |
765 // exception klass (and without finding a generic handler) then we | |
766 // know this exception is not handled in this method. We just rethrow | |
767 // the exception into the caller. | |
768 throw_to_exit(make_exception_state(ex_node)); | |
769 return; | |
770 } | |
771 | |
772 // exception handler bci range covers throw_bci => investigate further | |
773 int handler_bci = handler->handler_bci(); | |
774 | |
775 if (remaining == 1) { | |
776 push_ex_oop(ex_node); // Push exception oop for handler | |
777 #ifndef PRODUCT | |
778 if (PrintOpto && WizardMode) { | |
779 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci); | |
780 } | |
781 #endif | |
782 merge_exception(handler_bci); // jump to handler | |
783 return; // No more handling to be done here! | |
784 } | |
785 | |
1344 | 786 // Get the handler's klass |
0 | 787 ciInstanceKlass* klass = handler->catch_klass(); |
1344 | 788 |
789 if (!klass->is_loaded()) { // klass is not loaded? | |
790 // fall through into catch_call_exceptions which will emit a | |
791 // handler with an uncommon trap. | |
792 break; | |
0 | 793 } |
794 | |
795 if (klass->is_interface()) // should not happen, but... | |
796 break; // bail out | |
797 | |
1344 | 798 // Check the type of the exception against the catch type |
0 | 799 const TypeKlassPtr *tk = TypeKlassPtr::make(klass); |
800 Node* con = _gvn.makecon(tk); | |
1344 | 801 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con); |
802 if (!stopped()) { | |
803 PreserveJVMState pjvms(this); | |
804 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr(); | |
805 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness"); | |
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806 Node* ex_oop = _gvn.transform(new (C) CheckCastPPNode(control(), ex_node, tinst)); |
0 | 807 push_ex_oop(ex_oop); // Push exception oop for handler |
808 #ifndef PRODUCT | |
809 if (PrintOpto && WizardMode) { | |
810 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci); | |
811 klass->print_name(); | |
812 tty->cr(); | |
813 } | |
814 #endif | |
815 merge_exception(handler_bci); | |
816 } | |
1344 | 817 set_control(not_subtype_ctrl); |
0 | 818 |
819 // Come here if exception does not match handler. | |
820 // Carry on with more handler checks. | |
821 --remaining; | |
822 } | |
823 | |
824 assert(!stopped(), "you should return if you finish the chain"); | |
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) { | |
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853 const TypePtr* addr_type = TypeMetadataPtr::make(method()); |
0 | 854 Node* adr1 = makecon(addr_type); |
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855 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset())); |
0 | 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: | |
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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: | |
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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() && | |
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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 } |