Mercurial > hg > graal-jvmci-8
annotate src/share/vm/opto/doCall.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author | coleenp |
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date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | 7f813940ac35 |
children | 9d89c76b0505 |
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 |
43 #ifndef PRODUCT | |
44 void trace_type_profile(ciMethod *method, int depth, int bci, ciMethod *prof_method, ciKlass *prof_klass, int site_count, int receiver_count) { | |
45 if (TraceTypeProfile || PrintInlining || PrintOptoInlining) { | |
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46 if (!PrintInlining) { |
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47 if (!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); |
0 | 52 } |
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53 CompileTask::print_inline_indent(depth); |
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54 tty->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count); |
0 | 55 prof_klass->name()->print_symbol(); |
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56 tty->cr(); |
0 | 57 } |
58 } | |
59 #endif | |
60 | |
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61 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_is_virtual, |
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62 JVMState* jvms, bool allow_inline, |
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63 float prof_factor, bool allow_intrinsics) { |
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64 ciMethod* caller = jvms->method(); |
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65 int bci = jvms->bci(); |
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66 Bytecodes::Code bytecode = caller->java_code_at_bci(bci); |
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67 guarantee(callee != NULL, "failed method resolution"); |
0 | 68 |
69 // Dtrace currently doesn't work unless all calls are vanilla | |
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70 if (env()->dtrace_method_probes()) { |
0 | 71 allow_inline = false; |
72 } | |
73 | |
74 // Note: When we get profiling during stage-1 compiles, we want to pull | |
75 // from more specific profile data which pertains to this inlining. | |
76 // Right now, ignore the information in jvms->caller(), and do method[bci]. | |
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77 ciCallProfile profile = caller->call_profile_at_bci(bci); |
0 | 78 |
79 // See how many times this site has been invoked. | |
80 int site_count = profile.count(); | |
81 int receiver_count = -1; | |
82 if (call_is_virtual && UseTypeProfile && profile.has_receiver(0)) { | |
83 // Receivers in the profile structure are ordered by call counts | |
84 // so that the most called (major) receiver is profile.receiver(0). | |
85 receiver_count = profile.receiver_count(0); | |
86 } | |
87 | |
88 CompileLog* log = this->log(); | |
89 if (log != NULL) { | |
90 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1; | |
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91 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1; |
0 | 92 log->begin_elem("call method='%d' count='%d' prof_factor='%g'", |
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93 log->identify(callee), site_count, prof_factor); |
0 | 94 if (call_is_virtual) log->print(" virtual='1'"); |
95 if (allow_inline) log->print(" inline='1'"); | |
96 if (receiver_count >= 0) { | |
97 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count); | |
98 if (profile.has_receiver(1)) { | |
99 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1)); | |
100 } | |
101 } | |
102 log->end_elem(); | |
103 } | |
104 | |
105 // Special case the handling of certain common, profitable library | |
106 // methods. If these methods are replaced with specialized code, | |
107 // then we return it as the inlined version of the call. | |
108 // We do this before the strict f.p. check below because the | |
109 // intrinsics handle strict f.p. correctly. | |
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110 if (allow_inline && allow_intrinsics) { |
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111 CallGenerator* cg = find_intrinsic(callee, call_is_virtual); |
0 | 112 if (cg != NULL) return cg; |
113 } | |
114 | |
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115 // Do method handle calls. |
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116 // NOTE: This must happen before normal inlining logic below since |
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117 // MethodHandle.invoke* are native methods which obviously don't |
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118 // have bytecodes and so normal inlining fails. |
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119 if (callee->is_method_handle_intrinsic()) { |
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120 return CallGenerator::for_method_handle_call(jvms, caller, callee); |
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121 } |
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122 |
0 | 123 // Do not inline strict fp into non-strict code, or the reverse |
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124 if (caller->is_strict() ^ callee->is_strict()) { |
0 | 125 allow_inline = false; |
126 } | |
127 | |
128 // Attempt to inline... | |
129 if (allow_inline) { | |
130 // The profile data is only partly attributable to this caller, | |
131 // scale back the call site information. | |
132 float past_uses = jvms->method()->scale_count(site_count, prof_factor); | |
133 // This is the number of times we expect the call code to be used. | |
134 float expected_uses = past_uses; | |
135 | |
136 // Try inlining a bytecoded method: | |
137 if (!call_is_virtual) { | |
138 InlineTree* ilt; | |
139 if (UseOldInlining) { | |
140 ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method()); | |
141 } else { | |
142 // Make a disembodied, stateless ILT. | |
143 // TO DO: When UseOldInlining is removed, copy the ILT code elsewhere. | |
144 float site_invoke_ratio = prof_factor; | |
145 // Note: ilt is for the root of this parse, not the present call site. | |
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146 ilt = new InlineTree(this, jvms->method(), jvms->caller(), site_invoke_ratio, MaxInlineLevel); |
0 | 147 } |
148 WarmCallInfo scratch_ci; | |
149 if (!UseOldInlining) | |
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150 scratch_ci.init(jvms, callee, profile, prof_factor); |
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151 WarmCallInfo* ci = ilt->ok_to_inline(callee, jvms, profile, &scratch_ci); |
0 | 152 assert(ci != &scratch_ci, "do not let this pointer escape"); |
153 bool allow_inline = (ci != NULL && !ci->is_cold()); | |
154 bool require_inline = (allow_inline && ci->is_hot()); | |
155 | |
156 if (allow_inline) { | |
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157 CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses); |
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158 if (require_inline && cg != NULL && should_delay_inlining(callee, jvms)) { |
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159 // Delay the inlining of this method to give us the |
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160 // opportunity to perform some high level optimizations |
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161 // first. |
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162 return CallGenerator::for_late_inline(callee, cg); |
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163 } |
0 | 164 if (cg == NULL) { |
165 // Fall through. | |
166 } else if (require_inline || !InlineWarmCalls) { | |
167 return cg; | |
168 } else { | |
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169 CallGenerator* cold_cg = call_generator(callee, vtable_index, call_is_virtual, jvms, false, prof_factor); |
0 | 170 return CallGenerator::for_warm_call(ci, cold_cg, cg); |
171 } | |
172 } | |
173 } | |
174 | |
175 // Try using the type profile. | |
176 if (call_is_virtual && site_count > 0 && receiver_count > 0) { | |
177 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count. | |
178 bool have_major_receiver = (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent); | |
179 ciMethod* receiver_method = NULL; | |
180 if (have_major_receiver || profile.morphism() == 1 || | |
181 (profile.morphism() == 2 && UseBimorphicInlining)) { | |
182 // receiver_method = profile.method(); | |
183 // Profiles do not suggest methods now. Look it up in the major receiver. | |
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184 receiver_method = callee->resolve_invoke(jvms->method()->holder(), |
0 | 185 profile.receiver(0)); |
186 } | |
187 if (receiver_method != NULL) { | |
188 // The single majority receiver sufficiently outweighs the minority. | |
189 CallGenerator* hit_cg = this->call_generator(receiver_method, | |
190 vtable_index, !call_is_virtual, jvms, allow_inline, prof_factor); | |
191 if (hit_cg != NULL) { | |
192 // Look up second receiver. | |
193 CallGenerator* next_hit_cg = NULL; | |
194 ciMethod* next_receiver_method = NULL; | |
195 if (profile.morphism() == 2 && UseBimorphicInlining) { | |
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196 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(), |
0 | 197 profile.receiver(1)); |
198 if (next_receiver_method != NULL) { | |
199 next_hit_cg = this->call_generator(next_receiver_method, | |
200 vtable_index, !call_is_virtual, jvms, | |
201 allow_inline, prof_factor); | |
202 if (next_hit_cg != NULL && !next_hit_cg->is_inline() && | |
203 have_major_receiver && UseOnlyInlinedBimorphic) { | |
204 // Skip if we can't inline second receiver's method | |
205 next_hit_cg = NULL; | |
206 } | |
207 } | |
208 } | |
209 CallGenerator* miss_cg; | |
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210 Deoptimization::DeoptReason reason = (profile.morphism() == 2) ? |
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211 Deoptimization::Reason_bimorphic : |
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212 Deoptimization::Reason_class_check; |
0 | 213 if (( profile.morphism() == 1 || |
214 (profile.morphism() == 2 && next_hit_cg != NULL) ) && | |
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215 !too_many_traps(jvms->method(), jvms->bci(), reason) |
0 | 216 ) { |
217 // Generate uncommon trap for class check failure path | |
218 // in case of monomorphic or bimorphic virtual call site. | |
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219 miss_cg = CallGenerator::for_uncommon_trap(callee, reason, |
0 | 220 Deoptimization::Action_maybe_recompile); |
221 } else { | |
222 // Generate virtual call for class check failure path | |
223 // in case of polymorphic virtual call site. | |
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224 miss_cg = CallGenerator::for_virtual_call(callee, vtable_index); |
0 | 225 } |
226 if (miss_cg != NULL) { | |
227 if (next_hit_cg != NULL) { | |
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228 NOT_PRODUCT(trace_type_profile(jvms->method(), jvms->depth() - 1, jvms->bci(), next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1))); |
0 | 229 // We don't need to record dependency on a receiver here and below. |
230 // Whenever we inline, the dependency is added by Parse::Parse(). | |
231 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX); | |
232 } | |
233 if (miss_cg != NULL) { | |
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234 NOT_PRODUCT(trace_type_profile(jvms->method(), jvms->depth() - 1, jvms->bci(), receiver_method, profile.receiver(0), site_count, receiver_count)); |
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235 CallGenerator* cg = CallGenerator::for_predicted_call(profile.receiver(0), miss_cg, hit_cg, profile.receiver_prob(0)); |
0 | 236 if (cg != NULL) return cg; |
237 } | |
238 } | |
239 } | |
240 } | |
241 } | |
242 } | |
243 | |
244 // There was no special inlining tactic, or it bailed out. | |
245 // Use a more generic tactic, like a simple call. | |
246 if (call_is_virtual) { | |
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247 return CallGenerator::for_virtual_call(callee, vtable_index); |
0 | 248 } else { |
249 // Class Hierarchy Analysis or Type Profile reveals a unique target, | |
250 // or it is a static or special call. | |
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251 return CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms)); |
0 | 252 } |
253 } | |
254 | |
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255 // Return true for methods that shouldn't be inlined early so that |
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256 // they are easier to analyze and optimize as intrinsics. |
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257 bool Compile::should_delay_inlining(ciMethod* call_method, JVMState* jvms) { |
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258 if (has_stringbuilder()) { |
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259 |
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260 if ((call_method->holder() == C->env()->StringBuilder_klass() || |
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261 call_method->holder() == C->env()->StringBuffer_klass()) && |
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262 (jvms->method()->holder() == C->env()->StringBuilder_klass() || |
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263 jvms->method()->holder() == C->env()->StringBuffer_klass())) { |
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264 // Delay SB calls only when called from non-SB code |
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265 return false; |
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266 } |
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267 |
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268 switch (call_method->intrinsic_id()) { |
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269 case vmIntrinsics::_StringBuilder_void: |
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270 case vmIntrinsics::_StringBuilder_int: |
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271 case vmIntrinsics::_StringBuilder_String: |
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272 case vmIntrinsics::_StringBuilder_append_char: |
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273 case vmIntrinsics::_StringBuilder_append_int: |
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274 case vmIntrinsics::_StringBuilder_append_String: |
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275 case vmIntrinsics::_StringBuilder_toString: |
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276 case vmIntrinsics::_StringBuffer_void: |
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277 case vmIntrinsics::_StringBuffer_int: |
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278 case vmIntrinsics::_StringBuffer_String: |
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279 case vmIntrinsics::_StringBuffer_append_char: |
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280 case vmIntrinsics::_StringBuffer_append_int: |
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281 case vmIntrinsics::_StringBuffer_append_String: |
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282 case vmIntrinsics::_StringBuffer_toString: |
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283 case vmIntrinsics::_Integer_toString: |
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284 return true; |
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285 |
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286 case vmIntrinsics::_String_String: |
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287 { |
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288 Node* receiver = jvms->map()->in(jvms->argoff() + 1); |
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289 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) { |
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290 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava(); |
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291 ciMethod* m = csj->method(); |
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292 if (m != NULL && |
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293 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString || |
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294 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString)) |
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295 // Delay String.<init>(new SB()) |
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296 return true; |
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297 } |
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298 return false; |
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299 } |
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300 |
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301 default: |
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302 return false; |
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303 } |
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304 } |
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305 return false; |
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306 } |
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307 |
0 | 308 |
309 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link | |
310 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) { | |
311 // Additional inputs to consider... | |
312 // bc = bc() | |
313 // caller = method() | |
314 // iter().get_method_holder_index() | |
315 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" ); | |
316 // Interface classes can be loaded & linked and never get around to | |
317 // being initialized. Uncommon-trap for not-initialized static or | |
318 // v-calls. Let interface calls happen. | |
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319 ciInstanceKlass* holder_klass = dest_method->holder(); |
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320 if (!holder_klass->is_being_initialized() && |
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321 !holder_klass->is_initialized() && |
0 | 322 !holder_klass->is_interface()) { |
323 uncommon_trap(Deoptimization::Reason_uninitialized, | |
324 Deoptimization::Action_reinterpret, | |
325 holder_klass); | |
326 return true; | |
327 } | |
328 | |
329 assert(dest_method->will_link(method()->holder(), klass, bc()), "dest_method: typeflow responsibility"); | |
330 return false; | |
331 } | |
332 | |
333 | |
334 //------------------------------do_call---------------------------------------- | |
335 // Handle your basic call. Inline if we can & want to, else just setup call. | |
336 void Parse::do_call() { | |
337 // It's likely we are going to add debug info soon. | |
338 // Also, if we inline a guy who eventually needs debug info for this JVMS, | |
339 // our contribution to it is cleaned up right here. | |
340 kill_dead_locals(); | |
341 | |
342 // Set frequently used booleans | |
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343 const bool is_virtual = bc() == Bytecodes::_invokevirtual; |
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344 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface; |
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345 const bool has_receiver = is_virtual_or_interface || bc() == Bytecodes::_invokespecial; |
0 | 346 |
347 // Find target being called | |
348 bool will_link; | |
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349 ciSignature* declared_signature = NULL; |
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350 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode |
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351 ciInstanceKlass* holder_klass = orig_callee->holder(); |
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352 ciKlass* holder = iter().get_declared_method_holder(); |
0 | 353 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder); |
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354 assert(declared_signature != NULL, "cannot be null"); |
0 | 355 |
356 // uncommon-trap when callee is unloaded, uninitialized or will not link | |
357 // bailout when too many arguments for register representation | |
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358 if (!will_link || can_not_compile_call_site(orig_callee, klass)) { |
0 | 359 #ifndef PRODUCT |
360 if (PrintOpto && (Verbose || WizardMode)) { | |
361 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci()); | |
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362 orig_callee->print_name(); tty->cr(); |
0 | 363 } |
364 #endif | |
365 return; | |
366 } | |
367 assert(holder_klass->is_loaded(), ""); | |
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368 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw) |
0 | 369 // Note: this takes into account invokeinterface of methods declared in java/lang/Object, |
370 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces | |
371 assert(holder_klass->is_interface() || holder_klass->super() == NULL || (bc() != Bytecodes::_invokeinterface), "must match bc"); | |
372 // Note: In the absence of miranda methods, an abstract class K can perform | |
373 // an invokevirtual directly on an interface method I.m if K implements I. | |
374 | |
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375 const int nargs = orig_callee->arg_size(); |
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376 |
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377 // Push appendix argument (MethodType, CallSite, etc.), if one. |
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378 if (iter().has_appendix()) { |
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379 ciObject* appendix_arg = iter().get_appendix(); |
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380 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg); |
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381 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type); |
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382 push(appendix_arg_node); |
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383 } |
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384 |
0 | 385 // --------------------- |
386 // Does Class Hierarchy Analysis reveal only a single target of a v-call? | |
387 // Then we may inline or make a static call, but become dependent on there being only 1 target. | |
388 // Does the call-site type profile reveal only one receiver? | |
389 // Then we may introduce a run-time check and inline on the path where it succeeds. | |
390 // The other path may uncommon_trap, check for another receiver, or do a v-call. | |
391 | |
392 // Choose call strategy. | |
393 bool call_is_virtual = is_virtual_or_interface; | |
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394 int vtable_index = Method::invalid_vtable_index; |
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395 ciMethod* callee = orig_callee; |
0 | 396 |
397 // Try to get the most accurate receiver type | |
398 if (is_virtual_or_interface) { | |
399 Node* receiver_node = stack(sp() - nargs); | |
400 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr(); | |
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401 ciMethod* optimized_virtual_method = optimize_inlining(method(), bci(), klass, orig_callee, receiver_type); |
0 | 402 |
403 // Have the call been sufficiently improved such that it is no longer a virtual? | |
404 if (optimized_virtual_method != NULL) { | |
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405 callee = optimized_virtual_method; |
0 | 406 call_is_virtual = false; |
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407 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) { |
0 | 408 // We can make a vtable call at this site |
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409 vtable_index = callee->resolve_vtable_index(method()->holder(), klass); |
0 | 410 } |
411 } | |
412 | |
413 // Note: It's OK to try to inline a virtual call. | |
414 // The call generator will not attempt to inline a polymorphic call | |
415 // unless it knows how to optimize the receiver dispatch. | |
416 bool try_inline = (C->do_inlining() || InlineAccessors); | |
417 | |
418 // --------------------- | |
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419 dec_sp(nargs); // Temporarily pop args for JVM state of call |
0 | 420 JVMState* jvms = sync_jvms(); |
421 | |
422 // --------------------- | |
423 // Decide call tactic. | |
424 // This call checks with CHA, the interpreter profile, intrinsics table, etc. | |
425 // It decides whether inlining is desirable or not. | |
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426 CallGenerator* cg = C->call_generator(callee, vtable_index, call_is_virtual, jvms, try_inline, prof_factor()); |
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427 |
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428 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead. |
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429 orig_callee = callee = NULL; |
0 | 430 |
431 // --------------------- | |
432 // Round double arguments before call | |
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433 round_double_arguments(cg->method()); |
0 | 434 |
435 #ifndef PRODUCT | |
436 // bump global counters for calls | |
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437 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline()); |
0 | 438 |
439 // Record first part of parsing work for this call | |
440 parse_histogram()->record_change(); | |
441 #endif // not PRODUCT | |
442 | |
443 assert(jvms == this->jvms(), "still operating on the right JVMS"); | |
444 assert(jvms_in_sync(), "jvms must carry full info into CG"); | |
445 | |
446 // save across call, for a subsequent cast_not_null. | |
447 Node* receiver = has_receiver ? argument(0) : NULL; | |
448 | |
449 // Bump method data counters (We profile *before* the call is made | |
450 // because exceptions don't return to the call site.) | |
451 profile_call(receiver); | |
452 | |
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453 JVMState* new_jvms = cg->generate(jvms); |
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454 if (new_jvms == NULL) { |
0 | 455 // When inlining attempt fails (e.g., too many arguments), |
456 // it may contaminate the current compile state, making it | |
457 // impossible to pull back and try again. Once we call | |
458 // cg->generate(), we are committed. If it fails, the whole | |
459 // compilation task is compromised. | |
460 if (failing()) return; | |
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461 |
0 | 462 // This can happen if a library intrinsic is available, but refuses |
463 // the call site, perhaps because it did not match a pattern the | |
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464 // intrinsic was expecting to optimize. Should always be possible to |
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465 // get a normal java call that may inline in that case |
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466 cg = C->call_generator(cg->method(), vtable_index, call_is_virtual, jvms, try_inline, prof_factor(), /* allow_intrinsics= */ false); |
0 | 467 if ((new_jvms = cg->generate(jvms)) == NULL) { |
468 guarantee(failing(), "call failed to generate: calls should work"); | |
469 return; | |
470 } | |
471 } | |
472 | |
473 if (cg->is_inline()) { | |
67 | 474 // Accumulate has_loops estimate |
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475 C->set_has_loops(C->has_loops() || cg->method()->has_loops()); |
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476 C->env()->notice_inlined_method(cg->method()); |
0 | 477 } |
478 | |
479 // Reset parser state from [new_]jvms, which now carries results of the call. | |
480 // Return value (if any) is already pushed on the stack by the cg. | |
481 add_exception_states_from(new_jvms); | |
482 if (new_jvms->map()->control() == top()) { | |
483 stop_and_kill_map(); | |
484 } else { | |
485 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged"); | |
486 set_jvms(new_jvms); | |
487 } | |
488 | |
489 if (!stopped()) { | |
490 // This was some sort of virtual call, which did a null check for us. | |
491 // Now we can assert receiver-not-null, on the normal return path. | |
492 if (receiver != NULL && cg->is_virtual()) { | |
493 Node* cast = cast_not_null(receiver); | |
494 // %%% assert(receiver == cast, "should already have cast the receiver"); | |
495 } | |
496 | |
497 // Round double result after a call from strict to non-strict code | |
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498 round_double_result(cg->method()); |
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499 |
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500 ciType* rtype = cg->method()->return_type(); |
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501 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw())) { |
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502 // Be careful here with return types. |
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503 ciType* ctype = declared_signature->return_type(); |
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504 if (ctype != rtype) { |
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505 BasicType rt = rtype->basic_type(); |
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506 BasicType ct = ctype->basic_type(); |
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507 Node* retnode = peek(); |
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508 if (ct == T_VOID) { |
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509 // It's OK for a method to return a value that is discarded. |
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510 // The discarding does not require any special action from the caller. |
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511 // The Java code knows this, at VerifyType.isNullConversion. |
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512 pop_node(rt); // whatever it was, pop it |
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513 retnode = top(); |
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514 } else if (rt == T_INT || is_subword_type(rt)) { |
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515 // FIXME: This logic should be factored out. |
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516 if (ct == T_BOOLEAN) { |
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517 retnode = _gvn.transform( new (C, 3) AndINode(retnode, intcon(0x1)) ); |
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518 } else if (ct == T_CHAR) { |
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519 retnode = _gvn.transform( new (C, 3) AndINode(retnode, intcon(0xFFFF)) ); |
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520 } else if (ct == T_BYTE) { |
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521 retnode = _gvn.transform( new (C, 3) LShiftINode(retnode, intcon(24)) ); |
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522 retnode = _gvn.transform( new (C, 3) RShiftINode(retnode, intcon(24)) ); |
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523 } else if (ct == T_SHORT) { |
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524 retnode = _gvn.transform( new (C, 3) LShiftINode(retnode, intcon(16)) ); |
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525 retnode = _gvn.transform( new (C, 3) RShiftINode(retnode, intcon(16)) ); |
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526 } else { |
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527 assert(ct == T_INT, err_msg_res("rt=%s, ct=%s", type2name(rt), type2name(ct))); |
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528 } |
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529 } else if (rt == T_OBJECT || rt == T_ARRAY) { |
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530 assert(ct == T_OBJECT || ct == T_ARRAY, err_msg_res("rt=%s, ct=%s", type2name(rt), type2name(ct))); |
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531 if (ctype->is_loaded()) { |
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532 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass()); |
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533 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass()); |
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534 if (arg_type != NULL && !arg_type->higher_equal(sig_type)) { |
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535 Node* cast_obj = _gvn.transform(new (C, 2) CheckCastPPNode(control(), retnode, sig_type)); |
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536 pop(); |
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537 push(cast_obj); |
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538 } |
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539 } |
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540 } else { |
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541 assert(ct == rt, err_msg("unexpected mismatch rt=%d, ct=%d", rt, ct)); |
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542 // push a zero; it's better than getting an oop/int mismatch |
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543 retnode = pop_node(rt); |
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544 retnode = zerocon(ct); |
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545 push_node(ct, retnode); |
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546 } |
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547 // Now that the value is well-behaved, continue with the call-site type. |
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548 rtype = ctype; |
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549 } |
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550 } |
0 | 551 |
552 // If the return type of the method is not loaded, assert that the | |
553 // value we got is a null. Otherwise, we need to recompile. | |
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554 if (!rtype->is_loaded()) { |
0 | 555 #ifndef PRODUCT |
556 if (PrintOpto && (Verbose || WizardMode)) { | |
557 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci()); | |
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558 cg->method()->print_name(); tty->cr(); |
0 | 559 } |
560 #endif | |
561 if (C->log() != NULL) { | |
562 C->log()->elem("assert_null reason='return' klass='%d'", | |
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563 C->log()->identify(rtype)); |
0 | 564 } |
565 // If there is going to be a trap, put it at the next bytecode: | |
566 set_bci(iter().next_bci()); | |
567 do_null_assert(peek(), T_OBJECT); | |
568 set_bci(iter().cur_bci()); // put it back | |
569 } | |
570 } | |
571 | |
572 // Restart record of parsing work after possible inlining of call | |
573 #ifndef PRODUCT | |
574 parse_histogram()->set_initial_state(bc()); | |
575 #endif | |
576 } | |
577 | |
578 //---------------------------catch_call_exceptions----------------------------- | |
579 // Put a Catch and CatchProj nodes behind a just-created call. | |
580 // Send their caught exceptions to the proper handler. | |
581 // This may be used after a call to the rethrow VM stub, | |
582 // when it is needed to process unloaded exception classes. | |
583 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) { | |
584 // Exceptions are delivered through this channel: | |
585 Node* i_o = this->i_o(); | |
586 | |
587 // Add a CatchNode. | |
588 GrowableArray<int>* bcis = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, -1); | |
589 GrowableArray<const Type*>* extypes = new (C->node_arena()) GrowableArray<const Type*>(C->node_arena(), 8, 0, NULL); | |
590 GrowableArray<int>* saw_unloaded = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, 0); | |
591 | |
592 for (; !handlers.is_done(); handlers.next()) { | |
593 ciExceptionHandler* h = handlers.handler(); | |
594 int h_bci = h->handler_bci(); | |
595 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass(); | |
596 // Do not introduce unloaded exception types into the graph: | |
597 if (!h_klass->is_loaded()) { | |
598 if (saw_unloaded->contains(h_bci)) { | |
599 /* We've already seen an unloaded exception with h_bci, | |
600 so don't duplicate. Duplication will cause the CatchNode to be | |
601 unnecessarily large. See 4713716. */ | |
602 continue; | |
603 } else { | |
604 saw_unloaded->append(h_bci); | |
605 } | |
606 } | |
607 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass); | |
608 // (We use make_from_klass because it respects UseUniqueSubclasses.) | |
609 h_extype = h_extype->join(TypeInstPtr::NOTNULL); | |
610 assert(!h_extype->empty(), "sanity"); | |
611 // Note: It's OK if the BCIs repeat themselves. | |
612 bcis->append(h_bci); | |
613 extypes->append(h_extype); | |
614 } | |
615 | |
616 int len = bcis->length(); | |
617 CatchNode *cn = new (C, 2) CatchNode(control(), i_o, len+1); | |
618 Node *catch_ = _gvn.transform(cn); | |
619 | |
620 // now branch with the exception state to each of the (potential) | |
621 // handlers | |
622 for(int i=0; i < len; i++) { | |
623 // Setup JVM state to enter the handler. | |
624 PreserveJVMState pjvms(this); | |
625 // Locals are just copied from before the call. | |
626 // Get control from the CatchNode. | |
627 int handler_bci = bcis->at(i); | |
628 Node* ctrl = _gvn.transform( new (C, 1) CatchProjNode(catch_, i+1,handler_bci)); | |
629 // This handler cannot happen? | |
630 if (ctrl == top()) continue; | |
631 set_control(ctrl); | |
632 | |
633 // Create exception oop | |
634 const TypeInstPtr* extype = extypes->at(i)->is_instptr(); | |
635 Node *ex_oop = _gvn.transform(new (C, 2) CreateExNode(extypes->at(i), ctrl, i_o)); | |
636 | |
637 // Handle unloaded exception classes. | |
638 if (saw_unloaded->contains(handler_bci)) { | |
639 // An unloaded exception type is coming here. Do an uncommon trap. | |
640 #ifndef PRODUCT | |
641 // We do not expect the same handler bci to take both cold unloaded | |
642 // and hot loaded exceptions. But, watch for it. | |
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643 if ((Verbose || WizardMode) && extype->is_loaded()) { |
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644 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci()); |
0 | 645 method()->print_name(); tty->cr(); |
646 } else if (PrintOpto && (Verbose || WizardMode)) { | |
647 tty->print("Bailing out on unloaded exception type "); | |
648 extype->klass()->print_name(); | |
649 tty->print(" at bci:%d in ", bci()); | |
650 method()->print_name(); tty->cr(); | |
651 } | |
652 #endif | |
653 // Emit an uncommon trap instead of processing the block. | |
654 set_bci(handler_bci); | |
655 push_ex_oop(ex_oop); | |
656 uncommon_trap(Deoptimization::Reason_unloaded, | |
657 Deoptimization::Action_reinterpret, | |
658 extype->klass(), "!loaded exception"); | |
659 set_bci(iter().cur_bci()); // put it back | |
660 continue; | |
661 } | |
662 | |
663 // go to the exception handler | |
664 if (handler_bci < 0) { // merge with corresponding rethrow node | |
665 throw_to_exit(make_exception_state(ex_oop)); | |
666 } else { // Else jump to corresponding handle | |
667 push_ex_oop(ex_oop); // Clear stack and push just the oop. | |
668 merge_exception(handler_bci); | |
669 } | |
670 } | |
671 | |
672 // The first CatchProj is for the normal return. | |
673 // (Note: If this is a call to rethrow_Java, this node goes dead.) | |
674 set_control(_gvn.transform( new (C, 1) CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci))); | |
675 } | |
676 | |
677 | |
678 //----------------------------catch_inline_exceptions-------------------------- | |
679 // Handle all exceptions thrown by an inlined method or individual bytecode. | |
680 // Common case 1: we have no handler, so all exceptions merge right into | |
681 // the rethrow case. | |
682 // Case 2: we have some handlers, with loaded exception klasses that have | |
683 // no subklasses. We do a Deutsch-Shiffman style type-check on the incoming | |
684 // exception oop and branch to the handler directly. | |
685 // Case 3: We have some handlers with subklasses or are not loaded at | |
686 // compile-time. We have to call the runtime to resolve the exception. | |
687 // So we insert a RethrowCall and all the logic that goes with it. | |
688 void Parse::catch_inline_exceptions(SafePointNode* ex_map) { | |
689 // Caller is responsible for saving away the map for normal control flow! | |
690 assert(stopped(), "call set_map(NULL) first"); | |
691 assert(method()->has_exception_handlers(), "don't come here w/o work to do"); | |
692 | |
693 Node* ex_node = saved_ex_oop(ex_map); | |
694 if (ex_node == top()) { | |
695 // No action needed. | |
696 return; | |
697 } | |
698 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr(); | |
699 NOT_PRODUCT(if (ex_type==NULL) tty->print_cr("*** Exception not InstPtr")); | |
700 if (ex_type == NULL) | |
701 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr(); | |
702 | |
703 // determine potential exception handlers | |
704 ciExceptionHandlerStream handlers(method(), bci(), | |
705 ex_type->klass()->as_instance_klass(), | |
706 ex_type->klass_is_exact()); | |
707 | |
708 // Start executing from the given throw state. (Keep its stack, for now.) | |
709 // Get the exception oop as known at compile time. | |
710 ex_node = use_exception_state(ex_map); | |
711 | |
712 // Get the exception oop klass from its header | |
713 Node* ex_klass_node = NULL; | |
714 if (has_ex_handler() && !ex_type->klass_is_exact()) { | |
715 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes()); | |
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716 ex_klass_node = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 717 |
718 // Compute the exception klass a little more cleverly. | |
719 // Obvious solution is to simple do a LoadKlass from the 'ex_node'. | |
720 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for | |
721 // each arm of the Phi. If I know something clever about the exceptions | |
722 // I'm loading the class from, I can replace the LoadKlass with the | |
723 // klass constant for the exception oop. | |
724 if( ex_node->is_Phi() ) { | |
725 ex_klass_node = new (C, ex_node->req()) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT ); | |
726 for( uint i = 1; i < ex_node->req(); i++ ) { | |
727 Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() ); | |
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728 Node* k = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 729 ex_klass_node->init_req( i, k ); |
730 } | |
731 _gvn.set_type(ex_klass_node, TypeKlassPtr::OBJECT); | |
732 | |
733 } | |
734 } | |
735 | |
736 // Scan the exception table for applicable handlers. | |
737 // If none, we can call rethrow() and be done! | |
738 // If precise (loaded with no subklasses), insert a D.S. style | |
739 // pointer compare to the correct handler and loop back. | |
740 // If imprecise, switch to the Rethrow VM-call style handling. | |
741 | |
742 int remaining = handlers.count_remaining(); | |
743 | |
744 // iterate through all entries sequentially | |
745 for (;!handlers.is_done(); handlers.next()) { | |
746 ciExceptionHandler* handler = handlers.handler(); | |
747 | |
748 if (handler->is_rethrow()) { | |
749 // If we fell off the end of the table without finding an imprecise | |
750 // exception klass (and without finding a generic handler) then we | |
751 // know this exception is not handled in this method. We just rethrow | |
752 // the exception into the caller. | |
753 throw_to_exit(make_exception_state(ex_node)); | |
754 return; | |
755 } | |
756 | |
757 // exception handler bci range covers throw_bci => investigate further | |
758 int handler_bci = handler->handler_bci(); | |
759 | |
760 if (remaining == 1) { | |
761 push_ex_oop(ex_node); // Push exception oop for handler | |
762 #ifndef PRODUCT | |
763 if (PrintOpto && WizardMode) { | |
764 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci); | |
765 } | |
766 #endif | |
767 merge_exception(handler_bci); // jump to handler | |
768 return; // No more handling to be done here! | |
769 } | |
770 | |
1344 | 771 // Get the handler's klass |
0 | 772 ciInstanceKlass* klass = handler->catch_klass(); |
1344 | 773 |
774 if (!klass->is_loaded()) { // klass is not loaded? | |
775 // fall through into catch_call_exceptions which will emit a | |
776 // handler with an uncommon trap. | |
777 break; | |
0 | 778 } |
779 | |
780 if (klass->is_interface()) // should not happen, but... | |
781 break; // bail out | |
782 | |
1344 | 783 // Check the type of the exception against the catch type |
0 | 784 const TypeKlassPtr *tk = TypeKlassPtr::make(klass); |
785 Node* con = _gvn.makecon(tk); | |
1344 | 786 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con); |
787 if (!stopped()) { | |
788 PreserveJVMState pjvms(this); | |
789 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr(); | |
790 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness"); | |
0 | 791 Node* ex_oop = _gvn.transform(new (C, 2) CheckCastPPNode(control(), ex_node, tinst)); |
792 push_ex_oop(ex_oop); // Push exception oop for handler | |
793 #ifndef PRODUCT | |
794 if (PrintOpto && WizardMode) { | |
795 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci); | |
796 klass->print_name(); | |
797 tty->cr(); | |
798 } | |
799 #endif | |
800 merge_exception(handler_bci); | |
801 } | |
1344 | 802 set_control(not_subtype_ctrl); |
0 | 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 // Oops, need to call into the VM to resolve the klasses at runtime. | |
812 // Note: This call must not deoptimize, since it is not a real at this bci! | |
813 kill_dead_locals(); | |
814 | |
815 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW, | |
816 OptoRuntime::rethrow_Type(), | |
817 OptoRuntime::rethrow_stub(), | |
818 NULL, NULL, | |
819 ex_node); | |
820 | |
821 // Rethrow is a pure call, no side effects, only a result. | |
822 // The result cannot be allocated, so we use I_O | |
823 | |
824 // Catch exceptions from the rethrow | |
825 catch_call_exceptions(handlers); | |
826 } | |
827 | |
828 | |
829 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.) | |
830 | |
831 | |
832 #ifndef PRODUCT | |
833 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) { | |
834 if( CountCompiledCalls ) { | |
835 if( at_method_entry ) { | |
836 // bump invocation counter if top method (for statistics) | |
837 if (CountCompiledCalls && depth() == 1) { | |
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838 const TypePtr* addr_type = TypeMetadataPtr::make(method()); |
0 | 839 Node* adr1 = makecon(addr_type); |
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840 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset())); |
0 | 841 increment_counter(adr2); |
842 } | |
843 } else if (is_inline) { | |
844 switch (bc()) { | |
845 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break; | |
846 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break; | |
847 case Bytecodes::_invokestatic: | |
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848 case Bytecodes::_invokedynamic: |
0 | 849 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break; |
850 default: fatal("unexpected call bytecode"); | |
851 } | |
852 } else { | |
853 switch (bc()) { | |
854 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break; | |
855 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break; | |
856 case Bytecodes::_invokestatic: | |
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857 case Bytecodes::_invokedynamic: |
0 | 858 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break; |
859 default: fatal("unexpected call bytecode"); | |
860 } | |
861 } | |
862 } | |
863 } | |
864 #endif //PRODUCT | |
865 | |
866 | |
867 // Identify possible target method and inlining style | |
868 ciMethod* Parse::optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass, | |
869 ciMethod *dest_method, const TypeOopPtr* receiver_type) { | |
870 // only use for virtual or interface calls | |
871 | |
872 // If it is obviously final, do not bother to call find_monomorphic_target, | |
873 // because the class hierarchy checks are not needed, and may fail due to | |
874 // incompletely loaded classes. Since we do our own class loading checks | |
875 // in this module, we may confidently bind to any method. | |
876 if (dest_method->can_be_statically_bound()) { | |
877 return dest_method; | |
878 } | |
879 | |
880 // Attempt to improve the receiver | |
881 bool actual_receiver_is_exact = false; | |
882 ciInstanceKlass* actual_receiver = klass; | |
883 if (receiver_type != NULL) { | |
884 // Array methods are all inherited from Object, and are monomorphic. | |
885 if (receiver_type->isa_aryptr() && | |
886 dest_method->holder() == env()->Object_klass()) { | |
887 return dest_method; | |
888 } | |
889 | |
890 // All other interesting cases are instance klasses. | |
891 if (!receiver_type->isa_instptr()) { | |
892 return NULL; | |
893 } | |
894 | |
895 ciInstanceKlass *ikl = receiver_type->klass()->as_instance_klass(); | |
896 if (ikl->is_loaded() && ikl->is_initialized() && !ikl->is_interface() && | |
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897 (ikl == actual_receiver || ikl->is_subtype_of(actual_receiver))) { |
0 | 898 // ikl is a same or better type than the original actual_receiver, |
899 // e.g. static receiver from bytecodes. | |
900 actual_receiver = ikl; | |
901 // Is the actual_receiver exact? | |
902 actual_receiver_is_exact = receiver_type->klass_is_exact(); | |
903 } | |
904 } | |
905 | |
906 ciInstanceKlass* calling_klass = caller->holder(); | |
907 ciMethod* cha_monomorphic_target = dest_method->find_monomorphic_target(calling_klass, klass, actual_receiver); | |
908 if (cha_monomorphic_target != NULL) { | |
909 assert(!cha_monomorphic_target->is_abstract(), ""); | |
910 // Look at the method-receiver type. Does it add "too much information"? | |
911 ciKlass* mr_klass = cha_monomorphic_target->holder(); | |
912 const Type* mr_type = TypeInstPtr::make(TypePtr::BotPTR, mr_klass); | |
913 if (receiver_type == NULL || !receiver_type->higher_equal(mr_type)) { | |
914 // Calling this method would include an implicit cast to its holder. | |
915 // %%% Not yet implemented. Would throw minor asserts at present. | |
916 // %%% The most common wins are already gained by +UseUniqueSubclasses. | |
917 // To fix, put the higher_equal check at the call of this routine, | |
918 // and add a CheckCastPP to the receiver. | |
919 if (TraceDependencies) { | |
920 tty->print_cr("found unique CHA method, but could not cast up"); | |
921 tty->print(" method = "); | |
922 cha_monomorphic_target->print(); | |
923 tty->cr(); | |
924 } | |
925 if (C->log() != NULL) { | |
926 C->log()->elem("missed_CHA_opportunity klass='%d' method='%d'", | |
927 C->log()->identify(klass), | |
928 C->log()->identify(cha_monomorphic_target)); | |
929 } | |
930 cha_monomorphic_target = NULL; | |
931 } | |
932 } | |
933 if (cha_monomorphic_target != NULL) { | |
934 // Hardwiring a virtual. | |
935 // If we inlined because CHA revealed only a single target method, | |
936 // then we are dependent on that target method not getting overridden | |
937 // by dynamic class loading. Be sure to test the "static" receiver | |
938 // dest_method here, as opposed to the actual receiver, which may | |
939 // falsely lead us to believe that the receiver is final or private. | |
940 C->dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target); | |
941 return cha_monomorphic_target; | |
942 } | |
943 | |
944 // If the type is exact, we can still bind the method w/o a vcall. | |
945 // (This case comes after CHA so we can see how much extra work it does.) | |
946 if (actual_receiver_is_exact) { | |
947 // In case of evolution, there is a dependence on every inlined method, since each | |
948 // such method can be changed when its class is redefined. | |
949 ciMethod* exact_method = dest_method->resolve_invoke(calling_klass, actual_receiver); | |
950 if (exact_method != NULL) { | |
951 #ifndef PRODUCT | |
952 if (PrintOpto) { | |
953 tty->print(" Calling method via exact type @%d --- ", bci); | |
954 exact_method->print_name(); | |
955 tty->cr(); | |
956 } | |
957 #endif | |
958 return exact_method; | |
959 } | |
960 } | |
961 | |
962 return NULL; | |
963 } |