Mercurial > hg > graal-compiler
annotate src/share/vm/opto/doCall.cpp @ 7061:113eb675c981
replaced MetaUtil.isJavaLangObject() with type.isClass(Object.class)
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 27 Nov 2012 22:28:19 +0100 |
parents | bb33c6fdcf0d |
children | beebba0acc11 |
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 void trace_type_profile(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 if (!PrintInlining) { |
6793 | 46 if (NOT_PRODUCT(!PrintOpto &&) !PrintCompilation) { |
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47 method->print_short_name(); |
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48 tty->cr(); |
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49 } |
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50 CompileTask::print_inlining(prof_method, depth, bci); |
0 | 51 } |
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52 CompileTask::print_inline_indent(depth); |
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53 tty->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count); |
0 | 54 prof_klass->name()->print_symbol(); |
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55 tty->cr(); |
0 | 56 } |
57 } | |
58 | |
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59 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_is_virtual, |
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60 JVMState* jvms, bool allow_inline, |
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61 float prof_factor, bool allow_intrinsics) { |
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62 ciMethod* caller = jvms->method(); |
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63 int bci = jvms->bci(); |
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64 Bytecodes::Code bytecode = caller->java_code_at_bci(bci); |
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65 guarantee(callee != NULL, "failed method resolution"); |
0 | 66 |
67 // Dtrace currently doesn't work unless all calls are vanilla | |
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68 if (env()->dtrace_method_probes()) { |
0 | 69 allow_inline = false; |
70 } | |
71 | |
72 // Note: When we get profiling during stage-1 compiles, we want to pull | |
73 // from more specific profile data which pertains to this inlining. | |
74 // Right now, ignore the information in jvms->caller(), and do method[bci]. | |
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75 ciCallProfile profile = caller->call_profile_at_bci(bci); |
0 | 76 |
77 // See how many times this site has been invoked. | |
78 int site_count = profile.count(); | |
79 int receiver_count = -1; | |
80 if (call_is_virtual && UseTypeProfile && profile.has_receiver(0)) { | |
81 // Receivers in the profile structure are ordered by call counts | |
82 // so that the most called (major) receiver is profile.receiver(0). | |
83 receiver_count = profile.receiver_count(0); | |
84 } | |
85 | |
86 CompileLog* log = this->log(); | |
87 if (log != NULL) { | |
88 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1; | |
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89 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1; |
0 | 90 log->begin_elem("call method='%d' count='%d' prof_factor='%g'", |
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91 log->identify(callee), site_count, prof_factor); |
0 | 92 if (call_is_virtual) log->print(" virtual='1'"); |
93 if (allow_inline) log->print(" inline='1'"); | |
94 if (receiver_count >= 0) { | |
95 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count); | |
96 if (profile.has_receiver(1)) { | |
97 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1)); | |
98 } | |
99 } | |
100 log->end_elem(); | |
101 } | |
102 | |
103 // Special case the handling of certain common, profitable library | |
104 // methods. If these methods are replaced with specialized code, | |
105 // then we return it as the inlined version of the call. | |
106 // We do this before the strict f.p. check below because the | |
107 // intrinsics handle strict f.p. correctly. | |
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108 if (allow_inline && allow_intrinsics) { |
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109 CallGenerator* cg = find_intrinsic(callee, call_is_virtual); |
6894 | 110 if (cg != NULL) { |
111 if (cg->is_predicted()) { | |
112 // Code without intrinsic but, hopefully, inlined. | |
113 CallGenerator* inline_cg = this->call_generator(callee, | |
114 vtable_index, call_is_virtual, jvms, allow_inline, prof_factor, false); | |
115 if (inline_cg != NULL) { | |
116 cg = CallGenerator::for_predicted_intrinsic(cg, inline_cg); | |
117 } | |
118 } | |
119 return cg; | |
120 } | |
0 | 121 } |
122 | |
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123 // Do method handle calls. |
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124 // NOTE: This must happen before normal inlining logic below since |
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125 // MethodHandle.invoke* are native methods which obviously don't |
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126 // have bytecodes and so normal inlining fails. |
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127 if (callee->is_method_handle_intrinsic()) { |
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128 return CallGenerator::for_method_handle_call(jvms, caller, callee); |
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129 } |
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130 |
0 | 131 // Do not inline strict fp into non-strict code, or the reverse |
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132 if (caller->is_strict() ^ callee->is_strict()) { |
0 | 133 allow_inline = false; |
134 } | |
135 | |
136 // Attempt to inline... | |
137 if (allow_inline) { | |
138 // The profile data is only partly attributable to this caller, | |
139 // scale back the call site information. | |
140 float past_uses = jvms->method()->scale_count(site_count, prof_factor); | |
141 // This is the number of times we expect the call code to be used. | |
142 float expected_uses = past_uses; | |
143 | |
144 // Try inlining a bytecoded method: | |
145 if (!call_is_virtual) { | |
146 InlineTree* ilt; | |
147 if (UseOldInlining) { | |
148 ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method()); | |
149 } else { | |
150 // Make a disembodied, stateless ILT. | |
151 // TO DO: When UseOldInlining is removed, copy the ILT code elsewhere. | |
152 float site_invoke_ratio = prof_factor; | |
153 // Note: ilt is for the root of this parse, not the present call site. | |
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154 ilt = new InlineTree(this, jvms->method(), jvms->caller(), site_invoke_ratio, MaxInlineLevel); |
0 | 155 } |
156 WarmCallInfo scratch_ci; | |
157 if (!UseOldInlining) | |
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158 scratch_ci.init(jvms, callee, profile, prof_factor); |
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159 WarmCallInfo* ci = ilt->ok_to_inline(callee, jvms, profile, &scratch_ci); |
0 | 160 assert(ci != &scratch_ci, "do not let this pointer escape"); |
161 bool allow_inline = (ci != NULL && !ci->is_cold()); | |
162 bool require_inline = (allow_inline && ci->is_hot()); | |
163 | |
164 if (allow_inline) { | |
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165 CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses); |
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166 if (require_inline && cg != NULL && should_delay_inlining(callee, jvms)) { |
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167 // Delay the inlining of this method to give us the |
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168 // opportunity to perform some high level optimizations |
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169 // first. |
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170 return CallGenerator::for_late_inline(callee, cg); |
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171 } |
0 | 172 if (cg == NULL) { |
173 // Fall through. | |
174 } else if (require_inline || !InlineWarmCalls) { | |
175 return cg; | |
176 } else { | |
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177 CallGenerator* cold_cg = call_generator(callee, vtable_index, call_is_virtual, jvms, false, prof_factor); |
0 | 178 return CallGenerator::for_warm_call(ci, cold_cg, cg); |
179 } | |
180 } | |
181 } | |
182 | |
183 // Try using the type profile. | |
184 if (call_is_virtual && site_count > 0 && receiver_count > 0) { | |
185 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count. | |
186 bool have_major_receiver = (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent); | |
187 ciMethod* receiver_method = NULL; | |
188 if (have_major_receiver || profile.morphism() == 1 || | |
189 (profile.morphism() == 2 && UseBimorphicInlining)) { | |
190 // receiver_method = profile.method(); | |
191 // Profiles do not suggest methods now. Look it up in the major receiver. | |
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192 receiver_method = callee->resolve_invoke(jvms->method()->holder(), |
0 | 193 profile.receiver(0)); |
194 } | |
195 if (receiver_method != NULL) { | |
196 // The single majority receiver sufficiently outweighs the minority. | |
197 CallGenerator* hit_cg = this->call_generator(receiver_method, | |
198 vtable_index, !call_is_virtual, jvms, allow_inline, prof_factor); | |
199 if (hit_cg != NULL) { | |
200 // Look up second receiver. | |
201 CallGenerator* next_hit_cg = NULL; | |
202 ciMethod* next_receiver_method = NULL; | |
203 if (profile.morphism() == 2 && UseBimorphicInlining) { | |
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204 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(), |
0 | 205 profile.receiver(1)); |
206 if (next_receiver_method != NULL) { | |
207 next_hit_cg = this->call_generator(next_receiver_method, | |
208 vtable_index, !call_is_virtual, jvms, | |
209 allow_inline, prof_factor); | |
210 if (next_hit_cg != NULL && !next_hit_cg->is_inline() && | |
211 have_major_receiver && UseOnlyInlinedBimorphic) { | |
212 // Skip if we can't inline second receiver's method | |
213 next_hit_cg = NULL; | |
214 } | |
215 } | |
216 } | |
217 CallGenerator* miss_cg; | |
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218 Deoptimization::DeoptReason reason = (profile.morphism() == 2) ? |
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219 Deoptimization::Reason_bimorphic : |
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220 Deoptimization::Reason_class_check; |
0 | 221 if (( profile.morphism() == 1 || |
222 (profile.morphism() == 2 && next_hit_cg != NULL) ) && | |
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223 !too_many_traps(jvms->method(), jvms->bci(), reason) |
0 | 224 ) { |
225 // Generate uncommon trap for class check failure path | |
226 // in case of monomorphic or bimorphic virtual call site. | |
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227 miss_cg = CallGenerator::for_uncommon_trap(callee, reason, |
0 | 228 Deoptimization::Action_maybe_recompile); |
229 } else { | |
230 // Generate virtual call for class check failure path | |
231 // in case of polymorphic virtual call site. | |
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232 miss_cg = CallGenerator::for_virtual_call(callee, vtable_index); |
0 | 233 } |
234 if (miss_cg != NULL) { | |
235 if (next_hit_cg != NULL) { | |
6793 | 236 trace_type_profile(jvms->method(), jvms->depth() - 1, jvms->bci(), next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1)); |
0 | 237 // We don't need to record dependency on a receiver here and below. |
238 // Whenever we inline, the dependency is added by Parse::Parse(). | |
239 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX); | |
240 } | |
241 if (miss_cg != NULL) { | |
6793 | 242 trace_type_profile(jvms->method(), jvms->depth() - 1, jvms->bci(), receiver_method, profile.receiver(0), site_count, receiver_count); |
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243 CallGenerator* cg = CallGenerator::for_predicted_call(profile.receiver(0), miss_cg, hit_cg, profile.receiver_prob(0)); |
0 | 244 if (cg != NULL) return cg; |
245 } | |
246 } | |
247 } | |
248 } | |
249 } | |
250 } | |
251 | |
252 // There was no special inlining tactic, or it bailed out. | |
253 // Use a more generic tactic, like a simple call. | |
254 if (call_is_virtual) { | |
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255 return CallGenerator::for_virtual_call(callee, vtable_index); |
0 | 256 } else { |
257 // Class Hierarchy Analysis or Type Profile reveals a unique target, | |
258 // or it is a static or special call. | |
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259 return CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms)); |
0 | 260 } |
261 } | |
262 | |
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263 // Return true for methods that shouldn't be inlined early so that |
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264 // they are easier to analyze and optimize as intrinsics. |
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265 bool Compile::should_delay_inlining(ciMethod* call_method, JVMState* jvms) { |
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266 if (has_stringbuilder()) { |
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267 |
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268 if ((call_method->holder() == C->env()->StringBuilder_klass() || |
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269 call_method->holder() == C->env()->StringBuffer_klass()) && |
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270 (jvms->method()->holder() == C->env()->StringBuilder_klass() || |
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271 jvms->method()->holder() == C->env()->StringBuffer_klass())) { |
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272 // Delay SB calls only when called from non-SB code |
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273 return false; |
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274 } |
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275 |
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276 switch (call_method->intrinsic_id()) { |
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277 case vmIntrinsics::_StringBuilder_void: |
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278 case vmIntrinsics::_StringBuilder_int: |
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279 case vmIntrinsics::_StringBuilder_String: |
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280 case vmIntrinsics::_StringBuilder_append_char: |
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281 case vmIntrinsics::_StringBuilder_append_int: |
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282 case vmIntrinsics::_StringBuilder_append_String: |
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283 case vmIntrinsics::_StringBuilder_toString: |
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284 case vmIntrinsics::_StringBuffer_void: |
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285 case vmIntrinsics::_StringBuffer_int: |
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286 case vmIntrinsics::_StringBuffer_String: |
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287 case vmIntrinsics::_StringBuffer_append_char: |
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288 case vmIntrinsics::_StringBuffer_append_int: |
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289 case vmIntrinsics::_StringBuffer_append_String: |
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290 case vmIntrinsics::_StringBuffer_toString: |
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291 case vmIntrinsics::_Integer_toString: |
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292 return true; |
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293 |
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294 case vmIntrinsics::_String_String: |
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295 { |
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296 Node* receiver = jvms->map()->in(jvms->argoff() + 1); |
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297 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) { |
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298 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava(); |
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299 ciMethod* m = csj->method(); |
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300 if (m != NULL && |
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301 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString || |
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302 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString)) |
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303 // Delay String.<init>(new SB()) |
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304 return true; |
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305 } |
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306 return false; |
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307 } |
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308 |
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309 default: |
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310 return false; |
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311 } |
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312 } |
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313 return false; |
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314 } |
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315 |
0 | 316 |
317 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link | |
318 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) { | |
319 // Additional inputs to consider... | |
320 // bc = bc() | |
321 // caller = method() | |
322 // iter().get_method_holder_index() | |
323 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" ); | |
324 // Interface classes can be loaded & linked and never get around to | |
325 // being initialized. Uncommon-trap for not-initialized static or | |
326 // v-calls. Let interface calls happen. | |
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327 ciInstanceKlass* holder_klass = dest_method->holder(); |
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328 if (!holder_klass->is_being_initialized() && |
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329 !holder_klass->is_initialized() && |
0 | 330 !holder_klass->is_interface()) { |
331 uncommon_trap(Deoptimization::Reason_uninitialized, | |
332 Deoptimization::Action_reinterpret, | |
333 holder_klass); | |
334 return true; | |
335 } | |
336 | |
6973 | 337 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility"); |
0 | 338 return false; |
339 } | |
340 | |
341 | |
342 //------------------------------do_call---------------------------------------- | |
343 // Handle your basic call. Inline if we can & want to, else just setup call. | |
344 void Parse::do_call() { | |
345 // It's likely we are going to add debug info soon. | |
346 // Also, if we inline a guy who eventually needs debug info for this JVMS, | |
347 // our contribution to it is cleaned up right here. | |
348 kill_dead_locals(); | |
349 | |
350 // Set frequently used booleans | |
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351 const bool is_virtual = bc() == Bytecodes::_invokevirtual; |
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352 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface; |
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353 const bool has_receiver = is_virtual_or_interface || bc() == Bytecodes::_invokespecial; |
0 | 354 |
355 // Find target being called | |
356 bool will_link; | |
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357 ciSignature* declared_signature = NULL; |
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358 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode |
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359 ciInstanceKlass* holder_klass = orig_callee->holder(); |
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360 ciKlass* holder = iter().get_declared_method_holder(); |
0 | 361 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder); |
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362 assert(declared_signature != NULL, "cannot be null"); |
0 | 363 |
364 // uncommon-trap when callee is unloaded, uninitialized or will not link | |
365 // bailout when too many arguments for register representation | |
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366 if (!will_link || can_not_compile_call_site(orig_callee, klass)) { |
0 | 367 #ifndef PRODUCT |
368 if (PrintOpto && (Verbose || WizardMode)) { | |
369 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci()); | |
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370 orig_callee->print_name(); tty->cr(); |
0 | 371 } |
372 #endif | |
373 return; | |
374 } | |
375 assert(holder_klass->is_loaded(), ""); | |
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376 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw) |
0 | 377 // Note: this takes into account invokeinterface of methods declared in java/lang/Object, |
378 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces | |
379 assert(holder_klass->is_interface() || holder_klass->super() == NULL || (bc() != Bytecodes::_invokeinterface), "must match bc"); | |
380 // Note: In the absence of miranda methods, an abstract class K can perform | |
381 // an invokevirtual directly on an interface method I.m if K implements I. | |
382 | |
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383 const int nargs = orig_callee->arg_size(); |
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384 |
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385 // Push appendix argument (MethodType, CallSite, etc.), if one. |
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386 if (iter().has_appendix()) { |
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387 ciObject* appendix_arg = iter().get_appendix(); |
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388 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg); |
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389 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type); |
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390 push(appendix_arg_node); |
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391 } |
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392 |
0 | 393 // --------------------- |
394 // Does Class Hierarchy Analysis reveal only a single target of a v-call? | |
395 // Then we may inline or make a static call, but become dependent on there being only 1 target. | |
396 // Does the call-site type profile reveal only one receiver? | |
397 // Then we may introduce a run-time check and inline on the path where it succeeds. | |
398 // The other path may uncommon_trap, check for another receiver, or do a v-call. | |
399 | |
400 // Choose call strategy. | |
401 bool call_is_virtual = is_virtual_or_interface; | |
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402 int vtable_index = Method::invalid_vtable_index; |
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403 ciMethod* callee = orig_callee; |
0 | 404 |
405 // Try to get the most accurate receiver type | |
406 if (is_virtual_or_interface) { | |
407 Node* receiver_node = stack(sp() - nargs); | |
408 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr(); | |
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409 ciMethod* optimized_virtual_method = optimize_inlining(method(), bci(), klass, orig_callee, receiver_type); |
0 | 410 |
411 // Have the call been sufficiently improved such that it is no longer a virtual? | |
412 if (optimized_virtual_method != NULL) { | |
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413 callee = optimized_virtual_method; |
0 | 414 call_is_virtual = false; |
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415 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) { |
0 | 416 // We can make a vtable call at this site |
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417 vtable_index = callee->resolve_vtable_index(method()->holder(), klass); |
0 | 418 } |
419 } | |
420 | |
421 // Note: It's OK to try to inline a virtual call. | |
422 // The call generator will not attempt to inline a polymorphic call | |
423 // unless it knows how to optimize the receiver dispatch. | |
424 bool try_inline = (C->do_inlining() || InlineAccessors); | |
425 | |
426 // --------------------- | |
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427 dec_sp(nargs); // Temporarily pop args for JVM state of call |
0 | 428 JVMState* jvms = sync_jvms(); |
429 | |
430 // --------------------- | |
431 // Decide call tactic. | |
432 // This call checks with CHA, the interpreter profile, intrinsics table, etc. | |
433 // It decides whether inlining is desirable or not. | |
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434 CallGenerator* cg = C->call_generator(callee, vtable_index, call_is_virtual, jvms, try_inline, prof_factor()); |
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435 |
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436 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead. |
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437 orig_callee = callee = NULL; |
0 | 438 |
439 // --------------------- | |
440 // Round double arguments before call | |
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441 round_double_arguments(cg->method()); |
0 | 442 |
443 #ifndef PRODUCT | |
444 // bump global counters for calls | |
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445 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline()); |
0 | 446 |
447 // Record first part of parsing work for this call | |
448 parse_histogram()->record_change(); | |
449 #endif // not PRODUCT | |
450 | |
451 assert(jvms == this->jvms(), "still operating on the right JVMS"); | |
452 assert(jvms_in_sync(), "jvms must carry full info into CG"); | |
453 | |
454 // save across call, for a subsequent cast_not_null. | |
455 Node* receiver = has_receiver ? argument(0) : NULL; | |
456 | |
457 // Bump method data counters (We profile *before* the call is made | |
458 // because exceptions don't return to the call site.) | |
459 profile_call(receiver); | |
460 | |
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461 JVMState* new_jvms = cg->generate(jvms); |
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462 if (new_jvms == NULL) { |
0 | 463 // When inlining attempt fails (e.g., too many arguments), |
464 // it may contaminate the current compile state, making it | |
465 // impossible to pull back and try again. Once we call | |
466 // cg->generate(), we are committed. If it fails, the whole | |
467 // compilation task is compromised. | |
468 if (failing()) return; | |
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469 |
0 | 470 // This can happen if a library intrinsic is available, but refuses |
471 // the call site, perhaps because it did not match a pattern the | |
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472 // intrinsic was expecting to optimize. Should always be possible to |
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473 // get a normal java call that may inline in that case |
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474 cg = C->call_generator(cg->method(), vtable_index, call_is_virtual, jvms, try_inline, prof_factor(), /* allow_intrinsics= */ false); |
0 | 475 if ((new_jvms = cg->generate(jvms)) == NULL) { |
476 guarantee(failing(), "call failed to generate: calls should work"); | |
477 return; | |
478 } | |
479 } | |
480 | |
481 if (cg->is_inline()) { | |
67 | 482 // Accumulate has_loops estimate |
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483 C->set_has_loops(C->has_loops() || cg->method()->has_loops()); |
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484 C->env()->notice_inlined_method(cg->method()); |
0 | 485 } |
486 | |
487 // Reset parser state from [new_]jvms, which now carries results of the call. | |
488 // Return value (if any) is already pushed on the stack by the cg. | |
489 add_exception_states_from(new_jvms); | |
490 if (new_jvms->map()->control() == top()) { | |
491 stop_and_kill_map(); | |
492 } else { | |
493 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged"); | |
494 set_jvms(new_jvms); | |
495 } | |
496 | |
497 if (!stopped()) { | |
498 // This was some sort of virtual call, which did a null check for us. | |
499 // Now we can assert receiver-not-null, on the normal return path. | |
500 if (receiver != NULL && cg->is_virtual()) { | |
501 Node* cast = cast_not_null(receiver); | |
502 // %%% assert(receiver == cast, "should already have cast the receiver"); | |
503 } | |
504 | |
505 // Round double result after a call from strict to non-strict code | |
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506 round_double_result(cg->method()); |
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507 |
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508 ciType* rtype = cg->method()->return_type(); |
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509 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw())) { |
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510 // Be careful here with return types. |
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511 ciType* ctype = declared_signature->return_type(); |
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512 if (ctype != rtype) { |
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513 BasicType rt = rtype->basic_type(); |
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514 BasicType ct = ctype->basic_type(); |
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515 Node* retnode = peek(); |
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516 if (ct == T_VOID) { |
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517 // It's OK for a method to return a value that is discarded. |
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518 // The discarding does not require any special action from the caller. |
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519 // The Java code knows this, at VerifyType.isNullConversion. |
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520 pop_node(rt); // whatever it was, pop it |
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521 retnode = top(); |
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522 } else if (rt == T_INT || is_subword_type(rt)) { |
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523 // FIXME: This logic should be factored out. |
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524 if (ct == T_BOOLEAN) { |
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525 retnode = _gvn.transform( new (C) AndINode(retnode, intcon(0x1)) ); |
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526 } else if (ct == T_CHAR) { |
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527 retnode = _gvn.transform( new (C) AndINode(retnode, intcon(0xFFFF)) ); |
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528 } else if (ct == T_BYTE) { |
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529 retnode = _gvn.transform( new (C) LShiftINode(retnode, intcon(24)) ); |
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530 retnode = _gvn.transform( new (C) RShiftINode(retnode, intcon(24)) ); |
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531 } else if (ct == T_SHORT) { |
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532 retnode = _gvn.transform( new (C) LShiftINode(retnode, intcon(16)) ); |
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533 retnode = _gvn.transform( new (C) RShiftINode(retnode, intcon(16)) ); |
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534 } else { |
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535 assert(ct == T_INT, err_msg_res("rt=%s, ct=%s", type2name(rt), type2name(ct))); |
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536 } |
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537 } else if (rt == T_OBJECT || rt == T_ARRAY) { |
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538 assert(ct == T_OBJECT || ct == T_ARRAY, err_msg_res("rt=%s, ct=%s", type2name(rt), type2name(ct))); |
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539 if (ctype->is_loaded()) { |
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540 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass()); |
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541 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass()); |
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542 if (arg_type != NULL && !arg_type->higher_equal(sig_type)) { |
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543 Node* cast_obj = _gvn.transform(new (C) CheckCastPPNode(control(), retnode, sig_type)); |
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544 pop(); |
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545 push(cast_obj); |
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546 } |
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547 } |
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548 } else { |
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549 assert(ct == rt, err_msg("unexpected mismatch rt=%d, ct=%d", rt, ct)); |
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550 // push a zero; it's better than getting an oop/int mismatch |
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551 retnode = pop_node(rt); |
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552 retnode = zerocon(ct); |
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553 push_node(ct, retnode); |
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554 } |
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555 // Now that the value is well-behaved, continue with the call-site type. |
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556 rtype = ctype; |
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557 } |
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558 } |
0 | 559 |
560 // If the return type of the method is not loaded, assert that the | |
561 // value we got is a null. Otherwise, we need to recompile. | |
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562 if (!rtype->is_loaded()) { |
0 | 563 #ifndef PRODUCT |
564 if (PrintOpto && (Verbose || WizardMode)) { | |
565 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci()); | |
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566 cg->method()->print_name(); tty->cr(); |
0 | 567 } |
568 #endif | |
569 if (C->log() != NULL) { | |
570 C->log()->elem("assert_null reason='return' klass='%d'", | |
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571 C->log()->identify(rtype)); |
0 | 572 } |
573 // If there is going to be a trap, put it at the next bytecode: | |
574 set_bci(iter().next_bci()); | |
575 do_null_assert(peek(), T_OBJECT); | |
576 set_bci(iter().cur_bci()); // put it back | |
577 } | |
578 } | |
579 | |
580 // Restart record of parsing work after possible inlining of call | |
581 #ifndef PRODUCT | |
582 parse_histogram()->set_initial_state(bc()); | |
583 #endif | |
584 } | |
585 | |
586 //---------------------------catch_call_exceptions----------------------------- | |
587 // Put a Catch and CatchProj nodes behind a just-created call. | |
588 // Send their caught exceptions to the proper handler. | |
589 // This may be used after a call to the rethrow VM stub, | |
590 // when it is needed to process unloaded exception classes. | |
591 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) { | |
592 // Exceptions are delivered through this channel: | |
593 Node* i_o = this->i_o(); | |
594 | |
595 // Add a CatchNode. | |
596 GrowableArray<int>* bcis = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, -1); | |
597 GrowableArray<const Type*>* extypes = new (C->node_arena()) GrowableArray<const Type*>(C->node_arena(), 8, 0, NULL); | |
598 GrowableArray<int>* saw_unloaded = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, 0); | |
599 | |
600 for (; !handlers.is_done(); handlers.next()) { | |
601 ciExceptionHandler* h = handlers.handler(); | |
602 int h_bci = h->handler_bci(); | |
603 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass(); | |
604 // Do not introduce unloaded exception types into the graph: | |
605 if (!h_klass->is_loaded()) { | |
606 if (saw_unloaded->contains(h_bci)) { | |
607 /* We've already seen an unloaded exception with h_bci, | |
608 so don't duplicate. Duplication will cause the CatchNode to be | |
609 unnecessarily large. See 4713716. */ | |
610 continue; | |
611 } else { | |
612 saw_unloaded->append(h_bci); | |
613 } | |
614 } | |
615 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass); | |
616 // (We use make_from_klass because it respects UseUniqueSubclasses.) | |
617 h_extype = h_extype->join(TypeInstPtr::NOTNULL); | |
618 assert(!h_extype->empty(), "sanity"); | |
619 // Note: It's OK if the BCIs repeat themselves. | |
620 bcis->append(h_bci); | |
621 extypes->append(h_extype); | |
622 } | |
623 | |
624 int len = bcis->length(); | |
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625 CatchNode *cn = new (C) CatchNode(control(), i_o, len+1); |
0 | 626 Node *catch_ = _gvn.transform(cn); |
627 | |
628 // now branch with the exception state to each of the (potential) | |
629 // handlers | |
630 for(int i=0; i < len; i++) { | |
631 // Setup JVM state to enter the handler. | |
632 PreserveJVMState pjvms(this); | |
633 // Locals are just copied from before the call. | |
634 // Get control from the CatchNode. | |
635 int handler_bci = bcis->at(i); | |
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636 Node* ctrl = _gvn.transform( new (C) CatchProjNode(catch_, i+1,handler_bci)); |
0 | 637 // This handler cannot happen? |
638 if (ctrl == top()) continue; | |
639 set_control(ctrl); | |
640 | |
641 // Create exception oop | |
642 const TypeInstPtr* extype = extypes->at(i)->is_instptr(); | |
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643 Node *ex_oop = _gvn.transform(new (C) CreateExNode(extypes->at(i), ctrl, i_o)); |
0 | 644 |
645 // Handle unloaded exception classes. | |
646 if (saw_unloaded->contains(handler_bci)) { | |
647 // An unloaded exception type is coming here. Do an uncommon trap. | |
648 #ifndef PRODUCT | |
649 // We do not expect the same handler bci to take both cold unloaded | |
650 // and hot loaded exceptions. But, watch for it. | |
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651 if ((Verbose || WizardMode) && extype->is_loaded()) { |
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652 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci()); |
0 | 653 method()->print_name(); tty->cr(); |
654 } else if (PrintOpto && (Verbose || WizardMode)) { | |
655 tty->print("Bailing out on unloaded exception type "); | |
656 extype->klass()->print_name(); | |
657 tty->print(" at bci:%d in ", bci()); | |
658 method()->print_name(); tty->cr(); | |
659 } | |
660 #endif | |
661 // Emit an uncommon trap instead of processing the block. | |
662 set_bci(handler_bci); | |
663 push_ex_oop(ex_oop); | |
664 uncommon_trap(Deoptimization::Reason_unloaded, | |
665 Deoptimization::Action_reinterpret, | |
666 extype->klass(), "!loaded exception"); | |
667 set_bci(iter().cur_bci()); // put it back | |
668 continue; | |
669 } | |
670 | |
671 // go to the exception handler | |
672 if (handler_bci < 0) { // merge with corresponding rethrow node | |
673 throw_to_exit(make_exception_state(ex_oop)); | |
674 } else { // Else jump to corresponding handle | |
675 push_ex_oop(ex_oop); // Clear stack and push just the oop. | |
676 merge_exception(handler_bci); | |
677 } | |
678 } | |
679 | |
680 // The first CatchProj is for the normal return. | |
681 // (Note: If this is a call to rethrow_Java, this node goes dead.) | |
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682 set_control(_gvn.transform( new (C) CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci))); |
0 | 683 } |
684 | |
685 | |
686 //----------------------------catch_inline_exceptions-------------------------- | |
687 // Handle all exceptions thrown by an inlined method or individual bytecode. | |
688 // Common case 1: we have no handler, so all exceptions merge right into | |
689 // the rethrow case. | |
690 // Case 2: we have some handlers, with loaded exception klasses that have | |
691 // no subklasses. We do a Deutsch-Shiffman style type-check on the incoming | |
692 // exception oop and branch to the handler directly. | |
693 // Case 3: We have some handlers with subklasses or are not loaded at | |
694 // compile-time. We have to call the runtime to resolve the exception. | |
695 // So we insert a RethrowCall and all the logic that goes with it. | |
696 void Parse::catch_inline_exceptions(SafePointNode* ex_map) { | |
697 // Caller is responsible for saving away the map for normal control flow! | |
698 assert(stopped(), "call set_map(NULL) first"); | |
699 assert(method()->has_exception_handlers(), "don't come here w/o work to do"); | |
700 | |
701 Node* ex_node = saved_ex_oop(ex_map); | |
702 if (ex_node == top()) { | |
703 // No action needed. | |
704 return; | |
705 } | |
706 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr(); | |
707 NOT_PRODUCT(if (ex_type==NULL) tty->print_cr("*** Exception not InstPtr")); | |
708 if (ex_type == NULL) | |
709 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr(); | |
710 | |
711 // determine potential exception handlers | |
712 ciExceptionHandlerStream handlers(method(), bci(), | |
713 ex_type->klass()->as_instance_klass(), | |
714 ex_type->klass_is_exact()); | |
715 | |
716 // Start executing from the given throw state. (Keep its stack, for now.) | |
717 // Get the exception oop as known at compile time. | |
718 ex_node = use_exception_state(ex_map); | |
719 | |
720 // Get the exception oop klass from its header | |
721 Node* ex_klass_node = NULL; | |
722 if (has_ex_handler() && !ex_type->klass_is_exact()) { | |
723 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes()); | |
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724 ex_klass_node = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 725 |
726 // Compute the exception klass a little more cleverly. | |
727 // Obvious solution is to simple do a LoadKlass from the 'ex_node'. | |
728 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for | |
729 // each arm of the Phi. If I know something clever about the exceptions | |
730 // I'm loading the class from, I can replace the LoadKlass with the | |
731 // klass constant for the exception oop. | |
732 if( ex_node->is_Phi() ) { | |
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733 ex_klass_node = new (C) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT ); |
0 | 734 for( uint i = 1; i < ex_node->req(); i++ ) { |
735 Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() ); | |
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736 Node* k = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 737 ex_klass_node->init_req( i, k ); |
738 } | |
739 _gvn.set_type(ex_klass_node, TypeKlassPtr::OBJECT); | |
740 | |
741 } | |
742 } | |
743 | |
744 // Scan the exception table for applicable handlers. | |
745 // If none, we can call rethrow() and be done! | |
746 // If precise (loaded with no subklasses), insert a D.S. style | |
747 // pointer compare to the correct handler and loop back. | |
748 // If imprecise, switch to the Rethrow VM-call style handling. | |
749 | |
750 int remaining = handlers.count_remaining(); | |
751 | |
752 // iterate through all entries sequentially | |
753 for (;!handlers.is_done(); handlers.next()) { | |
754 ciExceptionHandler* handler = handlers.handler(); | |
755 | |
756 if (handler->is_rethrow()) { | |
757 // If we fell off the end of the table without finding an imprecise | |
758 // exception klass (and without finding a generic handler) then we | |
759 // know this exception is not handled in this method. We just rethrow | |
760 // the exception into the caller. | |
761 throw_to_exit(make_exception_state(ex_node)); | |
762 return; | |
763 } | |
764 | |
765 // exception handler bci range covers throw_bci => investigate further | |
766 int handler_bci = handler->handler_bci(); | |
767 | |
768 if (remaining == 1) { | |
769 push_ex_oop(ex_node); // Push exception oop for handler | |
770 #ifndef PRODUCT | |
771 if (PrintOpto && WizardMode) { | |
772 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci); | |
773 } | |
774 #endif | |
775 merge_exception(handler_bci); // jump to handler | |
776 return; // No more handling to be done here! | |
777 } | |
778 | |
1344 | 779 // Get the handler's klass |
0 | 780 ciInstanceKlass* klass = handler->catch_klass(); |
1344 | 781 |
782 if (!klass->is_loaded()) { // klass is not loaded? | |
783 // fall through into catch_call_exceptions which will emit a | |
784 // handler with an uncommon trap. | |
785 break; | |
0 | 786 } |
787 | |
788 if (klass->is_interface()) // should not happen, but... | |
789 break; // bail out | |
790 | |
1344 | 791 // Check the type of the exception against the catch type |
0 | 792 const TypeKlassPtr *tk = TypeKlassPtr::make(klass); |
793 Node* con = _gvn.makecon(tk); | |
1344 | 794 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con); |
795 if (!stopped()) { | |
796 PreserveJVMState pjvms(this); | |
797 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr(); | |
798 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness"); | |
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799 Node* ex_oop = _gvn.transform(new (C) CheckCastPPNode(control(), ex_node, tinst)); |
0 | 800 push_ex_oop(ex_oop); // Push exception oop for handler |
801 #ifndef PRODUCT | |
802 if (PrintOpto && WizardMode) { | |
803 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci); | |
804 klass->print_name(); | |
805 tty->cr(); | |
806 } | |
807 #endif | |
808 merge_exception(handler_bci); | |
809 } | |
1344 | 810 set_control(not_subtype_ctrl); |
0 | 811 |
812 // Come here if exception does not match handler. | |
813 // Carry on with more handler checks. | |
814 --remaining; | |
815 } | |
816 | |
817 assert(!stopped(), "you should return if you finish the chain"); | |
818 | |
819 // Oops, need to call into the VM to resolve the klasses at runtime. | |
820 // Note: This call must not deoptimize, since it is not a real at this bci! | |
821 kill_dead_locals(); | |
822 | |
823 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW, | |
824 OptoRuntime::rethrow_Type(), | |
825 OptoRuntime::rethrow_stub(), | |
826 NULL, NULL, | |
827 ex_node); | |
828 | |
829 // Rethrow is a pure call, no side effects, only a result. | |
830 // The result cannot be allocated, so we use I_O | |
831 | |
832 // Catch exceptions from the rethrow | |
833 catch_call_exceptions(handlers); | |
834 } | |
835 | |
836 | |
837 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.) | |
838 | |
839 | |
840 #ifndef PRODUCT | |
841 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) { | |
842 if( CountCompiledCalls ) { | |
843 if( at_method_entry ) { | |
844 // bump invocation counter if top method (for statistics) | |
845 if (CountCompiledCalls && depth() == 1) { | |
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846 const TypePtr* addr_type = TypeMetadataPtr::make(method()); |
0 | 847 Node* adr1 = makecon(addr_type); |
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848 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset())); |
0 | 849 increment_counter(adr2); |
850 } | |
851 } else if (is_inline) { | |
852 switch (bc()) { | |
853 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break; | |
854 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break; | |
855 case Bytecodes::_invokestatic: | |
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856 case Bytecodes::_invokedynamic: |
0 | 857 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break; |
858 default: fatal("unexpected call bytecode"); | |
859 } | |
860 } else { | |
861 switch (bc()) { | |
862 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break; | |
863 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break; | |
864 case Bytecodes::_invokestatic: | |
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865 case Bytecodes::_invokedynamic: |
0 | 866 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break; |
867 default: fatal("unexpected call bytecode"); | |
868 } | |
869 } | |
870 } | |
871 } | |
872 #endif //PRODUCT | |
873 | |
874 | |
875 // Identify possible target method and inlining style | |
876 ciMethod* Parse::optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass, | |
877 ciMethod *dest_method, const TypeOopPtr* receiver_type) { | |
878 // only use for virtual or interface calls | |
879 | |
880 // If it is obviously final, do not bother to call find_monomorphic_target, | |
881 // because the class hierarchy checks are not needed, and may fail due to | |
882 // incompletely loaded classes. Since we do our own class loading checks | |
883 // in this module, we may confidently bind to any method. | |
884 if (dest_method->can_be_statically_bound()) { | |
885 return dest_method; | |
886 } | |
887 | |
888 // Attempt to improve the receiver | |
889 bool actual_receiver_is_exact = false; | |
890 ciInstanceKlass* actual_receiver = klass; | |
891 if (receiver_type != NULL) { | |
892 // Array methods are all inherited from Object, and are monomorphic. | |
893 if (receiver_type->isa_aryptr() && | |
894 dest_method->holder() == env()->Object_klass()) { | |
895 return dest_method; | |
896 } | |
897 | |
898 // All other interesting cases are instance klasses. | |
899 if (!receiver_type->isa_instptr()) { | |
900 return NULL; | |
901 } | |
902 | |
903 ciInstanceKlass *ikl = receiver_type->klass()->as_instance_klass(); | |
904 if (ikl->is_loaded() && ikl->is_initialized() && !ikl->is_interface() && | |
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905 (ikl == actual_receiver || ikl->is_subtype_of(actual_receiver))) { |
0 | 906 // ikl is a same or better type than the original actual_receiver, |
907 // e.g. static receiver from bytecodes. | |
908 actual_receiver = ikl; | |
909 // Is the actual_receiver exact? | |
910 actual_receiver_is_exact = receiver_type->klass_is_exact(); | |
911 } | |
912 } | |
913 | |
914 ciInstanceKlass* calling_klass = caller->holder(); | |
915 ciMethod* cha_monomorphic_target = dest_method->find_monomorphic_target(calling_klass, klass, actual_receiver); | |
916 if (cha_monomorphic_target != NULL) { | |
917 assert(!cha_monomorphic_target->is_abstract(), ""); | |
918 // Look at the method-receiver type. Does it add "too much information"? | |
919 ciKlass* mr_klass = cha_monomorphic_target->holder(); | |
920 const Type* mr_type = TypeInstPtr::make(TypePtr::BotPTR, mr_klass); | |
921 if (receiver_type == NULL || !receiver_type->higher_equal(mr_type)) { | |
922 // Calling this method would include an implicit cast to its holder. | |
923 // %%% Not yet implemented. Would throw minor asserts at present. | |
924 // %%% The most common wins are already gained by +UseUniqueSubclasses. | |
925 // To fix, put the higher_equal check at the call of this routine, | |
926 // and add a CheckCastPP to the receiver. | |
927 if (TraceDependencies) { | |
928 tty->print_cr("found unique CHA method, but could not cast up"); | |
929 tty->print(" method = "); | |
930 cha_monomorphic_target->print(); | |
931 tty->cr(); | |
932 } | |
933 if (C->log() != NULL) { | |
934 C->log()->elem("missed_CHA_opportunity klass='%d' method='%d'", | |
935 C->log()->identify(klass), | |
936 C->log()->identify(cha_monomorphic_target)); | |
937 } | |
938 cha_monomorphic_target = NULL; | |
939 } | |
940 } | |
941 if (cha_monomorphic_target != NULL) { | |
942 // Hardwiring a virtual. | |
943 // If we inlined because CHA revealed only a single target method, | |
944 // then we are dependent on that target method not getting overridden | |
945 // by dynamic class loading. Be sure to test the "static" receiver | |
946 // dest_method here, as opposed to the actual receiver, which may | |
947 // falsely lead us to believe that the receiver is final or private. | |
948 C->dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target); | |
949 return cha_monomorphic_target; | |
950 } | |
951 | |
952 // If the type is exact, we can still bind the method w/o a vcall. | |
953 // (This case comes after CHA so we can see how much extra work it does.) | |
954 if (actual_receiver_is_exact) { | |
955 // In case of evolution, there is a dependence on every inlined method, since each | |
956 // such method can be changed when its class is redefined. | |
957 ciMethod* exact_method = dest_method->resolve_invoke(calling_klass, actual_receiver); | |
958 if (exact_method != NULL) { | |
959 #ifndef PRODUCT | |
960 if (PrintOpto) { | |
961 tty->print(" Calling method via exact type @%d --- ", bci); | |
962 exact_method->print_name(); | |
963 tty->cr(); | |
964 } | |
965 #endif | |
966 return exact_method; | |
967 } | |
968 } | |
969 | |
970 return NULL; | |
971 } |