Mercurial > hg > graal-jvmci-8
annotate src/share/vm/opto/doCall.cpp @ 3853:11211f7cb5a0
7079317: Incorrect branch's destination block in PrintoOptoAssembly output
Summary: save/restore label and block in scratch_emit_size()
Reviewed-by: never
author | kvn |
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date | Tue, 16 Aug 2011 11:53:57 -0700 |
parents | fdb992d83a87 |
children | aa67216400d3 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2011, 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/ciCPCache.hpp" | |
27 #include "ci/ciCallSite.hpp" | |
28 #include "ci/ciMethodHandle.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
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30 #include "compiler/compileBroker.hpp" |
1972 | 31 #include "compiler/compileLog.hpp" |
32 #include "interpreter/linkResolver.hpp" | |
33 #include "opto/addnode.hpp" | |
34 #include "opto/callGenerator.hpp" | |
35 #include "opto/cfgnode.hpp" | |
36 #include "opto/mulnode.hpp" | |
37 #include "opto/parse.hpp" | |
38 #include "opto/rootnode.hpp" | |
39 #include "opto/runtime.hpp" | |
40 #include "opto/subnode.hpp" | |
41 #include "prims/nativeLookup.hpp" | |
42 #include "runtime/sharedRuntime.hpp" | |
0 | 43 |
44 #ifndef PRODUCT | |
45 void trace_type_profile(ciMethod *method, int depth, int bci, ciMethod *prof_method, ciKlass *prof_klass, int site_count, int receiver_count) { | |
46 if (TraceTypeProfile || PrintInlining || PrintOptoInlining) { | |
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47 if (!PrintInlining) { |
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48 if (!PrintOpto && !PrintCompilation) { |
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49 method->print_short_name(); |
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50 tty->cr(); |
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51 } |
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52 CompileTask::print_inlining(prof_method, depth, bci); |
0 | 53 } |
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54 CompileTask::print_inline_indent(depth); |
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55 tty->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count); |
0 | 56 prof_klass->name()->print_symbol(); |
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57 tty->cr(); |
0 | 58 } |
59 } | |
60 #endif | |
61 | |
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62 CallGenerator* Compile::call_generator(ciMethod* call_method, int vtable_index, bool call_is_virtual, |
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63 JVMState* jvms, bool allow_inline, |
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64 float prof_factor) { |
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65 CallGenerator* cg; |
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66 ciMethod* caller = jvms->method(); |
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67 int bci = jvms->bci(); |
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68 Bytecodes::Code bytecode = caller->java_code_at_bci(bci); |
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69 guarantee(call_method != NULL, "failed method resolution"); |
0 | 70 |
71 // Dtrace currently doesn't work unless all calls are vanilla | |
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72 if (env()->dtrace_method_probes()) { |
0 | 73 allow_inline = false; |
74 } | |
75 | |
76 // Note: When we get profiling during stage-1 compiles, we want to pull | |
77 // from more specific profile data which pertains to this inlining. | |
78 // Right now, ignore the information in jvms->caller(), and do method[bci]. | |
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79 ciCallProfile profile = caller->call_profile_at_bci(bci); |
0 | 80 |
81 // See how many times this site has been invoked. | |
82 int site_count = profile.count(); | |
83 int receiver_count = -1; | |
84 if (call_is_virtual && UseTypeProfile && profile.has_receiver(0)) { | |
85 // Receivers in the profile structure are ordered by call counts | |
86 // so that the most called (major) receiver is profile.receiver(0). | |
87 receiver_count = profile.receiver_count(0); | |
88 } | |
89 | |
90 CompileLog* log = this->log(); | |
91 if (log != NULL) { | |
92 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1; | |
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93 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1; |
0 | 94 log->begin_elem("call method='%d' count='%d' prof_factor='%g'", |
95 log->identify(call_method), site_count, prof_factor); | |
96 if (call_is_virtual) log->print(" virtual='1'"); | |
97 if (allow_inline) log->print(" inline='1'"); | |
98 if (receiver_count >= 0) { | |
99 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count); | |
100 if (profile.has_receiver(1)) { | |
101 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1)); | |
102 } | |
103 } | |
104 log->end_elem(); | |
105 } | |
106 | |
107 // Special case the handling of certain common, profitable library | |
108 // methods. If these methods are replaced with specialized code, | |
109 // then we return it as the inlined version of the call. | |
110 // We do this before the strict f.p. check below because the | |
111 // intrinsics handle strict f.p. correctly. | |
112 if (allow_inline) { | |
113 cg = find_intrinsic(call_method, call_is_virtual); | |
114 if (cg != NULL) return cg; | |
115 } | |
116 | |
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117 // Do method handle calls. |
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118 // NOTE: This must happen before normal inlining logic below since |
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119 // MethodHandle.invoke* are native methods which obviously don't |
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120 // have bytecodes and so normal inlining fails. |
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121 if (call_method->is_method_handle_invoke()) { |
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122 if (bytecode != Bytecodes::_invokedynamic) { |
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123 GraphKit kit(jvms); |
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124 Node* n = kit.argument(0); |
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125 |
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126 CallGenerator* cg = CallGenerator::for_method_handle_inline(n, jvms, caller, call_method, profile); |
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127 if (cg != NULL) { |
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128 return cg; |
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129 } |
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130 return CallGenerator::for_direct_call(call_method); |
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131 } |
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132 else { |
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133 // Get the CallSite object. |
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134 ciMethod* caller_method = jvms->method(); |
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135 ciBytecodeStream str(caller_method); |
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136 str.force_bci(jvms->bci()); // Set the stream to the invokedynamic bci. |
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137 ciCallSite* call_site = str.get_call_site(); |
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138 |
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139 // Inline constant and mutable call sites. We don't inline |
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140 // volatile call sites optimistically since they are specified |
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141 // to change their value often and that would result in a lot of |
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142 // deoptimizations and recompiles. |
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143 if (call_site->is_constant_call_site() || call_site->is_mutable_call_site()) { |
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144 CallGenerator* cg = CallGenerator::for_invokedynamic_inline(call_site, jvms, caller, call_method, profile); |
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145 if (cg != NULL) { |
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146 return cg; |
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147 } |
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148 } |
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149 // If something failed, generate a normal dynamic call. |
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150 return CallGenerator::for_dynamic_call(call_method); |
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151 } |
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152 } |
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153 |
0 | 154 // Do not inline strict fp into non-strict code, or the reverse |
155 bool caller_method_is_strict = jvms->method()->is_strict(); | |
156 if( caller_method_is_strict ^ call_method->is_strict() ) { | |
157 allow_inline = false; | |
158 } | |
159 | |
160 // Attempt to inline... | |
161 if (allow_inline) { | |
162 // The profile data is only partly attributable to this caller, | |
163 // scale back the call site information. | |
164 float past_uses = jvms->method()->scale_count(site_count, prof_factor); | |
165 // This is the number of times we expect the call code to be used. | |
166 float expected_uses = past_uses; | |
167 | |
168 // Try inlining a bytecoded method: | |
169 if (!call_is_virtual) { | |
170 InlineTree* ilt; | |
171 if (UseOldInlining) { | |
172 ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method()); | |
173 } else { | |
174 // Make a disembodied, stateless ILT. | |
175 // TO DO: When UseOldInlining is removed, copy the ILT code elsewhere. | |
176 float site_invoke_ratio = prof_factor; | |
177 // Note: ilt is for the root of this parse, not the present call site. | |
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178 ilt = new InlineTree(this, jvms->method(), jvms->caller(), site_invoke_ratio, MaxInlineLevel); |
0 | 179 } |
180 WarmCallInfo scratch_ci; | |
181 if (!UseOldInlining) | |
182 scratch_ci.init(jvms, call_method, profile, prof_factor); | |
183 WarmCallInfo* ci = ilt->ok_to_inline(call_method, jvms, profile, &scratch_ci); | |
184 assert(ci != &scratch_ci, "do not let this pointer escape"); | |
185 bool allow_inline = (ci != NULL && !ci->is_cold()); | |
186 bool require_inline = (allow_inline && ci->is_hot()); | |
187 | |
188 if (allow_inline) { | |
189 CallGenerator* cg = CallGenerator::for_inline(call_method, expected_uses); | |
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190 if (require_inline && cg != NULL && should_delay_inlining(call_method, jvms)) { |
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191 // Delay the inlining of this method to give us the |
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192 // opportunity to perform some high level optimizations |
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193 // first. |
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194 return CallGenerator::for_late_inline(call_method, cg); |
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195 } |
0 | 196 if (cg == NULL) { |
197 // Fall through. | |
198 } else if (require_inline || !InlineWarmCalls) { | |
199 return cg; | |
200 } else { | |
201 CallGenerator* cold_cg = call_generator(call_method, vtable_index, call_is_virtual, jvms, false, prof_factor); | |
202 return CallGenerator::for_warm_call(ci, cold_cg, cg); | |
203 } | |
204 } | |
205 } | |
206 | |
207 // Try using the type profile. | |
208 if (call_is_virtual && site_count > 0 && receiver_count > 0) { | |
209 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count. | |
210 bool have_major_receiver = (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent); | |
211 ciMethod* receiver_method = NULL; | |
212 if (have_major_receiver || profile.morphism() == 1 || | |
213 (profile.morphism() == 2 && UseBimorphicInlining)) { | |
214 // receiver_method = profile.method(); | |
215 // Profiles do not suggest methods now. Look it up in the major receiver. | |
216 receiver_method = call_method->resolve_invoke(jvms->method()->holder(), | |
217 profile.receiver(0)); | |
218 } | |
219 if (receiver_method != NULL) { | |
220 // The single majority receiver sufficiently outweighs the minority. | |
221 CallGenerator* hit_cg = this->call_generator(receiver_method, | |
222 vtable_index, !call_is_virtual, jvms, allow_inline, prof_factor); | |
223 if (hit_cg != NULL) { | |
224 // Look up second receiver. | |
225 CallGenerator* next_hit_cg = NULL; | |
226 ciMethod* next_receiver_method = NULL; | |
227 if (profile.morphism() == 2 && UseBimorphicInlining) { | |
228 next_receiver_method = call_method->resolve_invoke(jvms->method()->holder(), | |
229 profile.receiver(1)); | |
230 if (next_receiver_method != NULL) { | |
231 next_hit_cg = this->call_generator(next_receiver_method, | |
232 vtable_index, !call_is_virtual, jvms, | |
233 allow_inline, prof_factor); | |
234 if (next_hit_cg != NULL && !next_hit_cg->is_inline() && | |
235 have_major_receiver && UseOnlyInlinedBimorphic) { | |
236 // Skip if we can't inline second receiver's method | |
237 next_hit_cg = NULL; | |
238 } | |
239 } | |
240 } | |
241 CallGenerator* miss_cg; | |
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242 Deoptimization::DeoptReason reason = (profile.morphism() == 2) ? |
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243 Deoptimization::Reason_bimorphic : |
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244 Deoptimization::Reason_class_check; |
0 | 245 if (( profile.morphism() == 1 || |
246 (profile.morphism() == 2 && next_hit_cg != NULL) ) && | |
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247 !too_many_traps(jvms->method(), jvms->bci(), reason) |
0 | 248 ) { |
249 // Generate uncommon trap for class check failure path | |
250 // in case of monomorphic or bimorphic virtual call site. | |
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251 miss_cg = CallGenerator::for_uncommon_trap(call_method, reason, |
0 | 252 Deoptimization::Action_maybe_recompile); |
253 } else { | |
254 // Generate virtual call for class check failure path | |
255 // in case of polymorphic virtual call site. | |
256 miss_cg = CallGenerator::for_virtual_call(call_method, vtable_index); | |
257 } | |
258 if (miss_cg != NULL) { | |
259 if (next_hit_cg != NULL) { | |
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260 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 | 261 // We don't need to record dependency on a receiver here and below. |
262 // Whenever we inline, the dependency is added by Parse::Parse(). | |
263 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX); | |
264 } | |
265 if (miss_cg != NULL) { | |
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266 NOT_PRODUCT(trace_type_profile(jvms->method(), jvms->depth() - 1, jvms->bci(), receiver_method, profile.receiver(0), site_count, receiver_count)); |
0 | 267 cg = CallGenerator::for_predicted_call(profile.receiver(0), miss_cg, hit_cg, profile.receiver_prob(0)); |
268 if (cg != NULL) return cg; | |
269 } | |
270 } | |
271 } | |
272 } | |
273 } | |
274 } | |
275 | |
276 // There was no special inlining tactic, or it bailed out. | |
277 // Use a more generic tactic, like a simple call. | |
278 if (call_is_virtual) { | |
279 return CallGenerator::for_virtual_call(call_method, vtable_index); | |
280 } else { | |
281 // Class Hierarchy Analysis or Type Profile reveals a unique target, | |
282 // or it is a static or special call. | |
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283 return CallGenerator::for_direct_call(call_method, should_delay_inlining(call_method, jvms)); |
0 | 284 } |
285 } | |
286 | |
1080
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287 // Return true for methods that shouldn't be inlined early so that |
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288 // they are easier to analyze and optimize as intrinsics. |
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289 bool Compile::should_delay_inlining(ciMethod* call_method, JVMState* jvms) { |
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290 if (has_stringbuilder()) { |
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291 |
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292 if ((call_method->holder() == C->env()->StringBuilder_klass() || |
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293 call_method->holder() == C->env()->StringBuffer_klass()) && |
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294 (jvms->method()->holder() == C->env()->StringBuilder_klass() || |
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295 jvms->method()->holder() == C->env()->StringBuffer_klass())) { |
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296 // Delay SB calls only when called from non-SB code |
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297 return false; |
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298 } |
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299 |
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300 switch (call_method->intrinsic_id()) { |
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301 case vmIntrinsics::_StringBuilder_void: |
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302 case vmIntrinsics::_StringBuilder_int: |
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303 case vmIntrinsics::_StringBuilder_String: |
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304 case vmIntrinsics::_StringBuilder_append_char: |
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305 case vmIntrinsics::_StringBuilder_append_int: |
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306 case vmIntrinsics::_StringBuilder_append_String: |
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307 case vmIntrinsics::_StringBuilder_toString: |
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308 case vmIntrinsics::_StringBuffer_void: |
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309 case vmIntrinsics::_StringBuffer_int: |
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310 case vmIntrinsics::_StringBuffer_String: |
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311 case vmIntrinsics::_StringBuffer_append_char: |
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312 case vmIntrinsics::_StringBuffer_append_int: |
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313 case vmIntrinsics::_StringBuffer_append_String: |
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314 case vmIntrinsics::_StringBuffer_toString: |
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315 case vmIntrinsics::_Integer_toString: |
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316 return true; |
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317 |
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318 case vmIntrinsics::_String_String: |
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319 { |
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320 Node* receiver = jvms->map()->in(jvms->argoff() + 1); |
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321 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) { |
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322 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava(); |
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323 ciMethod* m = csj->method(); |
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324 if (m != NULL && |
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325 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString || |
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326 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString)) |
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327 // Delay String.<init>(new SB()) |
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328 return true; |
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329 } |
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330 return false; |
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331 } |
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332 |
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333 default: |
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334 return false; |
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335 } |
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336 } |
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337 return false; |
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338 } |
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339 |
0 | 340 |
341 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link | |
342 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) { | |
343 // Additional inputs to consider... | |
344 // bc = bc() | |
345 // caller = method() | |
346 // iter().get_method_holder_index() | |
347 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" ); | |
348 // Interface classes can be loaded & linked and never get around to | |
349 // being initialized. Uncommon-trap for not-initialized static or | |
350 // v-calls. Let interface calls happen. | |
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351 ciInstanceKlass* holder_klass = dest_method->holder(); |
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352 if (!holder_klass->is_being_initialized() && |
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353 !holder_klass->is_initialized() && |
0 | 354 !holder_klass->is_interface()) { |
355 uncommon_trap(Deoptimization::Reason_uninitialized, | |
356 Deoptimization::Action_reinterpret, | |
357 holder_klass); | |
358 return true; | |
359 } | |
360 | |
361 assert(dest_method->will_link(method()->holder(), klass, bc()), "dest_method: typeflow responsibility"); | |
362 return false; | |
363 } | |
364 | |
365 | |
366 //------------------------------do_call---------------------------------------- | |
367 // Handle your basic call. Inline if we can & want to, else just setup call. | |
368 void Parse::do_call() { | |
369 // It's likely we are going to add debug info soon. | |
370 // Also, if we inline a guy who eventually needs debug info for this JVMS, | |
371 // our contribution to it is cleaned up right here. | |
372 kill_dead_locals(); | |
373 | |
374 // Set frequently used booleans | |
375 bool is_virtual = bc() == Bytecodes::_invokevirtual; | |
376 bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface; | |
377 bool has_receiver = is_virtual_or_interface || bc() == Bytecodes::_invokespecial; | |
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378 bool is_invokedynamic = bc() == Bytecodes::_invokedynamic; |
0 | 379 |
380 // Find target being called | |
381 bool will_link; | |
382 ciMethod* dest_method = iter().get_method(will_link); | |
383 ciInstanceKlass* holder_klass = dest_method->holder(); | |
384 ciKlass* holder = iter().get_declared_method_holder(); | |
385 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder); | |
386 | |
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387 int nargs = dest_method->arg_size(); |
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388 if (is_invokedynamic) nargs -= 1; |
0 | 389 |
390 // uncommon-trap when callee is unloaded, uninitialized or will not link | |
391 // bailout when too many arguments for register representation | |
392 if (!will_link || can_not_compile_call_site(dest_method, klass)) { | |
393 #ifndef PRODUCT | |
394 if (PrintOpto && (Verbose || WizardMode)) { | |
395 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci()); | |
396 dest_method->print_name(); tty->cr(); | |
397 } | |
398 #endif | |
399 return; | |
400 } | |
401 assert(holder_klass->is_loaded(), ""); | |
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402 assert((dest_method->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); |
0 | 403 // Note: this takes into account invokeinterface of methods declared in java/lang/Object, |
404 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces | |
405 assert(holder_klass->is_interface() || holder_klass->super() == NULL || (bc() != Bytecodes::_invokeinterface), "must match bc"); | |
406 // Note: In the absence of miranda methods, an abstract class K can perform | |
407 // an invokevirtual directly on an interface method I.m if K implements I. | |
408 | |
409 // --------------------- | |
410 // Does Class Hierarchy Analysis reveal only a single target of a v-call? | |
411 // Then we may inline or make a static call, but become dependent on there being only 1 target. | |
412 // Does the call-site type profile reveal only one receiver? | |
413 // Then we may introduce a run-time check and inline on the path where it succeeds. | |
414 // The other path may uncommon_trap, check for another receiver, or do a v-call. | |
415 | |
416 // Choose call strategy. | |
417 bool call_is_virtual = is_virtual_or_interface; | |
418 int vtable_index = methodOopDesc::invalid_vtable_index; | |
419 ciMethod* call_method = dest_method; | |
420 | |
421 // Try to get the most accurate receiver type | |
422 if (is_virtual_or_interface) { | |
423 Node* receiver_node = stack(sp() - nargs); | |
424 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr(); | |
425 ciMethod* optimized_virtual_method = optimize_inlining(method(), bci(), klass, dest_method, receiver_type); | |
426 | |
427 // Have the call been sufficiently improved such that it is no longer a virtual? | |
428 if (optimized_virtual_method != NULL) { | |
429 call_method = optimized_virtual_method; | |
430 call_is_virtual = false; | |
431 } else if (!UseInlineCaches && is_virtual && call_method->is_loaded()) { | |
432 // We can make a vtable call at this site | |
433 vtable_index = call_method->resolve_vtable_index(method()->holder(), klass); | |
434 } | |
435 } | |
436 | |
437 // Note: It's OK to try to inline a virtual call. | |
438 // The call generator will not attempt to inline a polymorphic call | |
439 // unless it knows how to optimize the receiver dispatch. | |
440 bool try_inline = (C->do_inlining() || InlineAccessors); | |
441 | |
442 // --------------------- | |
443 inc_sp(- nargs); // Temporarily pop args for JVM state of call | |
444 JVMState* jvms = sync_jvms(); | |
445 | |
446 // --------------------- | |
447 // Decide call tactic. | |
448 // This call checks with CHA, the interpreter profile, intrinsics table, etc. | |
449 // It decides whether inlining is desirable or not. | |
450 CallGenerator* cg = C->call_generator(call_method, vtable_index, call_is_virtual, jvms, try_inline, prof_factor()); | |
451 | |
452 // --------------------- | |
453 // Round double arguments before call | |
454 round_double_arguments(dest_method); | |
455 | |
456 #ifndef PRODUCT | |
457 // bump global counters for calls | |
458 count_compiled_calls(false/*at_method_entry*/, cg->is_inline()); | |
459 | |
460 // Record first part of parsing work for this call | |
461 parse_histogram()->record_change(); | |
462 #endif // not PRODUCT | |
463 | |
464 assert(jvms == this->jvms(), "still operating on the right JVMS"); | |
465 assert(jvms_in_sync(), "jvms must carry full info into CG"); | |
466 | |
467 // save across call, for a subsequent cast_not_null. | |
468 Node* receiver = has_receiver ? argument(0) : NULL; | |
469 | |
470 // Bump method data counters (We profile *before* the call is made | |
471 // because exceptions don't return to the call site.) | |
472 profile_call(receiver); | |
473 | |
474 JVMState* new_jvms; | |
475 if ((new_jvms = cg->generate(jvms)) == NULL) { | |
476 // When inlining attempt fails (e.g., too many arguments), | |
477 // it may contaminate the current compile state, making it | |
478 // impossible to pull back and try again. Once we call | |
479 // cg->generate(), we are committed. If it fails, the whole | |
480 // compilation task is compromised. | |
481 if (failing()) return; | |
482 #ifndef PRODUCT | |
483 if (PrintOpto || PrintOptoInlining || PrintInlining) { | |
484 // Only one fall-back, so if an intrinsic fails, ignore any bytecodes. | |
485 if (cg->is_intrinsic() && call_method->code_size() > 0) { | |
486 tty->print("Bailed out of intrinsic, will not inline: "); | |
487 call_method->print_name(); tty->cr(); | |
488 } | |
489 } | |
490 #endif | |
491 // This can happen if a library intrinsic is available, but refuses | |
492 // the call site, perhaps because it did not match a pattern the | |
493 // intrinsic was expecting to optimize. The fallback position is | |
494 // to call out-of-line. | |
495 try_inline = false; // Inline tactic bailed out. | |
496 cg = C->call_generator(call_method, vtable_index, call_is_virtual, jvms, try_inline, prof_factor()); | |
497 if ((new_jvms = cg->generate(jvms)) == NULL) { | |
498 guarantee(failing(), "call failed to generate: calls should work"); | |
499 return; | |
500 } | |
501 } | |
502 | |
503 if (cg->is_inline()) { | |
67 | 504 // Accumulate has_loops estimate |
505 C->set_has_loops(C->has_loops() || call_method->has_loops()); | |
0 | 506 C->env()->notice_inlined_method(call_method); |
507 } | |
508 | |
509 // Reset parser state from [new_]jvms, which now carries results of the call. | |
510 // Return value (if any) is already pushed on the stack by the cg. | |
511 add_exception_states_from(new_jvms); | |
512 if (new_jvms->map()->control() == top()) { | |
513 stop_and_kill_map(); | |
514 } else { | |
515 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged"); | |
516 set_jvms(new_jvms); | |
517 } | |
518 | |
519 if (!stopped()) { | |
520 // This was some sort of virtual call, which did a null check for us. | |
521 // Now we can assert receiver-not-null, on the normal return path. | |
522 if (receiver != NULL && cg->is_virtual()) { | |
523 Node* cast = cast_not_null(receiver); | |
524 // %%% assert(receiver == cast, "should already have cast the receiver"); | |
525 } | |
526 | |
527 // Round double result after a call from strict to non-strict code | |
528 round_double_result(dest_method); | |
529 | |
530 // If the return type of the method is not loaded, assert that the | |
531 // value we got is a null. Otherwise, we need to recompile. | |
532 if (!dest_method->return_type()->is_loaded()) { | |
533 #ifndef PRODUCT | |
534 if (PrintOpto && (Verbose || WizardMode)) { | |
535 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci()); | |
536 dest_method->print_name(); tty->cr(); | |
537 } | |
538 #endif | |
539 if (C->log() != NULL) { | |
540 C->log()->elem("assert_null reason='return' klass='%d'", | |
541 C->log()->identify(dest_method->return_type())); | |
542 } | |
543 // If there is going to be a trap, put it at the next bytecode: | |
544 set_bci(iter().next_bci()); | |
545 do_null_assert(peek(), T_OBJECT); | |
546 set_bci(iter().cur_bci()); // put it back | |
547 } | |
548 } | |
549 | |
550 // Restart record of parsing work after possible inlining of call | |
551 #ifndef PRODUCT | |
552 parse_histogram()->set_initial_state(bc()); | |
553 #endif | |
554 } | |
555 | |
556 //---------------------------catch_call_exceptions----------------------------- | |
557 // Put a Catch and CatchProj nodes behind a just-created call. | |
558 // Send their caught exceptions to the proper handler. | |
559 // This may be used after a call to the rethrow VM stub, | |
560 // when it is needed to process unloaded exception classes. | |
561 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) { | |
562 // Exceptions are delivered through this channel: | |
563 Node* i_o = this->i_o(); | |
564 | |
565 // Add a CatchNode. | |
566 GrowableArray<int>* bcis = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, -1); | |
567 GrowableArray<const Type*>* extypes = new (C->node_arena()) GrowableArray<const Type*>(C->node_arena(), 8, 0, NULL); | |
568 GrowableArray<int>* saw_unloaded = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, 0); | |
569 | |
570 for (; !handlers.is_done(); handlers.next()) { | |
571 ciExceptionHandler* h = handlers.handler(); | |
572 int h_bci = h->handler_bci(); | |
573 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass(); | |
574 // Do not introduce unloaded exception types into the graph: | |
575 if (!h_klass->is_loaded()) { | |
576 if (saw_unloaded->contains(h_bci)) { | |
577 /* We've already seen an unloaded exception with h_bci, | |
578 so don't duplicate. Duplication will cause the CatchNode to be | |
579 unnecessarily large. See 4713716. */ | |
580 continue; | |
581 } else { | |
582 saw_unloaded->append(h_bci); | |
583 } | |
584 } | |
585 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass); | |
586 // (We use make_from_klass because it respects UseUniqueSubclasses.) | |
587 h_extype = h_extype->join(TypeInstPtr::NOTNULL); | |
588 assert(!h_extype->empty(), "sanity"); | |
589 // Note: It's OK if the BCIs repeat themselves. | |
590 bcis->append(h_bci); | |
591 extypes->append(h_extype); | |
592 } | |
593 | |
594 int len = bcis->length(); | |
595 CatchNode *cn = new (C, 2) CatchNode(control(), i_o, len+1); | |
596 Node *catch_ = _gvn.transform(cn); | |
597 | |
598 // now branch with the exception state to each of the (potential) | |
599 // handlers | |
600 for(int i=0; i < len; i++) { | |
601 // Setup JVM state to enter the handler. | |
602 PreserveJVMState pjvms(this); | |
603 // Locals are just copied from before the call. | |
604 // Get control from the CatchNode. | |
605 int handler_bci = bcis->at(i); | |
606 Node* ctrl = _gvn.transform( new (C, 1) CatchProjNode(catch_, i+1,handler_bci)); | |
607 // This handler cannot happen? | |
608 if (ctrl == top()) continue; | |
609 set_control(ctrl); | |
610 | |
611 // Create exception oop | |
612 const TypeInstPtr* extype = extypes->at(i)->is_instptr(); | |
613 Node *ex_oop = _gvn.transform(new (C, 2) CreateExNode(extypes->at(i), ctrl, i_o)); | |
614 | |
615 // Handle unloaded exception classes. | |
616 if (saw_unloaded->contains(handler_bci)) { | |
617 // An unloaded exception type is coming here. Do an uncommon trap. | |
618 #ifndef PRODUCT | |
619 // We do not expect the same handler bci to take both cold unloaded | |
620 // and hot loaded exceptions. But, watch for it. | |
621 if (extype->is_loaded()) { | |
622 tty->print_cr("Warning: Handler @%d takes mixed loaded/unloaded exceptions in "); | |
623 method()->print_name(); tty->cr(); | |
624 } else if (PrintOpto && (Verbose || WizardMode)) { | |
625 tty->print("Bailing out on unloaded exception type "); | |
626 extype->klass()->print_name(); | |
627 tty->print(" at bci:%d in ", bci()); | |
628 method()->print_name(); tty->cr(); | |
629 } | |
630 #endif | |
631 // Emit an uncommon trap instead of processing the block. | |
632 set_bci(handler_bci); | |
633 push_ex_oop(ex_oop); | |
634 uncommon_trap(Deoptimization::Reason_unloaded, | |
635 Deoptimization::Action_reinterpret, | |
636 extype->klass(), "!loaded exception"); | |
637 set_bci(iter().cur_bci()); // put it back | |
638 continue; | |
639 } | |
640 | |
641 // go to the exception handler | |
642 if (handler_bci < 0) { // merge with corresponding rethrow node | |
643 throw_to_exit(make_exception_state(ex_oop)); | |
644 } else { // Else jump to corresponding handle | |
645 push_ex_oop(ex_oop); // Clear stack and push just the oop. | |
646 merge_exception(handler_bci); | |
647 } | |
648 } | |
649 | |
650 // The first CatchProj is for the normal return. | |
651 // (Note: If this is a call to rethrow_Java, this node goes dead.) | |
652 set_control(_gvn.transform( new (C, 1) CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci))); | |
653 } | |
654 | |
655 | |
656 //----------------------------catch_inline_exceptions-------------------------- | |
657 // Handle all exceptions thrown by an inlined method or individual bytecode. | |
658 // Common case 1: we have no handler, so all exceptions merge right into | |
659 // the rethrow case. | |
660 // Case 2: we have some handlers, with loaded exception klasses that have | |
661 // no subklasses. We do a Deutsch-Shiffman style type-check on the incoming | |
662 // exception oop and branch to the handler directly. | |
663 // Case 3: We have some handlers with subklasses or are not loaded at | |
664 // compile-time. We have to call the runtime to resolve the exception. | |
665 // So we insert a RethrowCall and all the logic that goes with it. | |
666 void Parse::catch_inline_exceptions(SafePointNode* ex_map) { | |
667 // Caller is responsible for saving away the map for normal control flow! | |
668 assert(stopped(), "call set_map(NULL) first"); | |
669 assert(method()->has_exception_handlers(), "don't come here w/o work to do"); | |
670 | |
671 Node* ex_node = saved_ex_oop(ex_map); | |
672 if (ex_node == top()) { | |
673 // No action needed. | |
674 return; | |
675 } | |
676 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr(); | |
677 NOT_PRODUCT(if (ex_type==NULL) tty->print_cr("*** Exception not InstPtr")); | |
678 if (ex_type == NULL) | |
679 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr(); | |
680 | |
681 // determine potential exception handlers | |
682 ciExceptionHandlerStream handlers(method(), bci(), | |
683 ex_type->klass()->as_instance_klass(), | |
684 ex_type->klass_is_exact()); | |
685 | |
686 // Start executing from the given throw state. (Keep its stack, for now.) | |
687 // Get the exception oop as known at compile time. | |
688 ex_node = use_exception_state(ex_map); | |
689 | |
690 // Get the exception oop klass from its header | |
691 Node* ex_klass_node = NULL; | |
692 if (has_ex_handler() && !ex_type->klass_is_exact()) { | |
693 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes()); | |
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694 ex_klass_node = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 695 |
696 // Compute the exception klass a little more cleverly. | |
697 // Obvious solution is to simple do a LoadKlass from the 'ex_node'. | |
698 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for | |
699 // each arm of the Phi. If I know something clever about the exceptions | |
700 // I'm loading the class from, I can replace the LoadKlass with the | |
701 // klass constant for the exception oop. | |
702 if( ex_node->is_Phi() ) { | |
703 ex_klass_node = new (C, ex_node->req()) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT ); | |
704 for( uint i = 1; i < ex_node->req(); i++ ) { | |
705 Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() ); | |
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706 Node* k = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 707 ex_klass_node->init_req( i, k ); |
708 } | |
709 _gvn.set_type(ex_klass_node, TypeKlassPtr::OBJECT); | |
710 | |
711 } | |
712 } | |
713 | |
714 // Scan the exception table for applicable handlers. | |
715 // If none, we can call rethrow() and be done! | |
716 // If precise (loaded with no subklasses), insert a D.S. style | |
717 // pointer compare to the correct handler and loop back. | |
718 // If imprecise, switch to the Rethrow VM-call style handling. | |
719 | |
720 int remaining = handlers.count_remaining(); | |
721 | |
722 // iterate through all entries sequentially | |
723 for (;!handlers.is_done(); handlers.next()) { | |
724 ciExceptionHandler* handler = handlers.handler(); | |
725 | |
726 if (handler->is_rethrow()) { | |
727 // If we fell off the end of the table without finding an imprecise | |
728 // exception klass (and without finding a generic handler) then we | |
729 // know this exception is not handled in this method. We just rethrow | |
730 // the exception into the caller. | |
731 throw_to_exit(make_exception_state(ex_node)); | |
732 return; | |
733 } | |
734 | |
735 // exception handler bci range covers throw_bci => investigate further | |
736 int handler_bci = handler->handler_bci(); | |
737 | |
738 if (remaining == 1) { | |
739 push_ex_oop(ex_node); // Push exception oop for handler | |
740 #ifndef PRODUCT | |
741 if (PrintOpto && WizardMode) { | |
742 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci); | |
743 } | |
744 #endif | |
745 merge_exception(handler_bci); // jump to handler | |
746 return; // No more handling to be done here! | |
747 } | |
748 | |
1344 | 749 // Get the handler's klass |
0 | 750 ciInstanceKlass* klass = handler->catch_klass(); |
1344 | 751 |
752 if (!klass->is_loaded()) { // klass is not loaded? | |
753 // fall through into catch_call_exceptions which will emit a | |
754 // handler with an uncommon trap. | |
755 break; | |
0 | 756 } |
757 | |
758 if (klass->is_interface()) // should not happen, but... | |
759 break; // bail out | |
760 | |
1344 | 761 // Check the type of the exception against the catch type |
0 | 762 const TypeKlassPtr *tk = TypeKlassPtr::make(klass); |
763 Node* con = _gvn.makecon(tk); | |
1344 | 764 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con); |
765 if (!stopped()) { | |
766 PreserveJVMState pjvms(this); | |
767 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr(); | |
768 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness"); | |
0 | 769 Node* ex_oop = _gvn.transform(new (C, 2) CheckCastPPNode(control(), ex_node, tinst)); |
770 push_ex_oop(ex_oop); // Push exception oop for handler | |
771 #ifndef PRODUCT | |
772 if (PrintOpto && WizardMode) { | |
773 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci); | |
774 klass->print_name(); | |
775 tty->cr(); | |
776 } | |
777 #endif | |
778 merge_exception(handler_bci); | |
779 } | |
1344 | 780 set_control(not_subtype_ctrl); |
0 | 781 |
782 // Come here if exception does not match handler. | |
783 // Carry on with more handler checks. | |
784 --remaining; | |
785 } | |
786 | |
787 assert(!stopped(), "you should return if you finish the chain"); | |
788 | |
789 // Oops, need to call into the VM to resolve the klasses at runtime. | |
790 // Note: This call must not deoptimize, since it is not a real at this bci! | |
791 kill_dead_locals(); | |
792 | |
793 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW, | |
794 OptoRuntime::rethrow_Type(), | |
795 OptoRuntime::rethrow_stub(), | |
796 NULL, NULL, | |
797 ex_node); | |
798 | |
799 // Rethrow is a pure call, no side effects, only a result. | |
800 // The result cannot be allocated, so we use I_O | |
801 | |
802 // Catch exceptions from the rethrow | |
803 catch_call_exceptions(handlers); | |
804 } | |
805 | |
806 | |
807 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.) | |
808 | |
809 | |
810 #ifndef PRODUCT | |
811 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) { | |
812 if( CountCompiledCalls ) { | |
813 if( at_method_entry ) { | |
814 // bump invocation counter if top method (for statistics) | |
815 if (CountCompiledCalls && depth() == 1) { | |
816 const TypeInstPtr* addr_type = TypeInstPtr::make(method()); | |
817 Node* adr1 = makecon(addr_type); | |
818 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(methodOopDesc::compiled_invocation_counter_offset())); | |
819 increment_counter(adr2); | |
820 } | |
821 } else if (is_inline) { | |
822 switch (bc()) { | |
823 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break; | |
824 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break; | |
825 case Bytecodes::_invokestatic: | |
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826 case Bytecodes::_invokedynamic: |
0 | 827 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break; |
828 default: fatal("unexpected call bytecode"); | |
829 } | |
830 } else { | |
831 switch (bc()) { | |
832 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break; | |
833 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break; | |
834 case Bytecodes::_invokestatic: | |
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835 case Bytecodes::_invokedynamic: |
0 | 836 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break; |
837 default: fatal("unexpected call bytecode"); | |
838 } | |
839 } | |
840 } | |
841 } | |
842 #endif //PRODUCT | |
843 | |
844 | |
845 // Identify possible target method and inlining style | |
846 ciMethod* Parse::optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass, | |
847 ciMethod *dest_method, const TypeOopPtr* receiver_type) { | |
848 // only use for virtual or interface calls | |
849 | |
850 // If it is obviously final, do not bother to call find_monomorphic_target, | |
851 // because the class hierarchy checks are not needed, and may fail due to | |
852 // incompletely loaded classes. Since we do our own class loading checks | |
853 // in this module, we may confidently bind to any method. | |
854 if (dest_method->can_be_statically_bound()) { | |
855 return dest_method; | |
856 } | |
857 | |
858 // Attempt to improve the receiver | |
859 bool actual_receiver_is_exact = false; | |
860 ciInstanceKlass* actual_receiver = klass; | |
861 if (receiver_type != NULL) { | |
862 // Array methods are all inherited from Object, and are monomorphic. | |
863 if (receiver_type->isa_aryptr() && | |
864 dest_method->holder() == env()->Object_klass()) { | |
865 return dest_method; | |
866 } | |
867 | |
868 // All other interesting cases are instance klasses. | |
869 if (!receiver_type->isa_instptr()) { | |
870 return NULL; | |
871 } | |
872 | |
873 ciInstanceKlass *ikl = receiver_type->klass()->as_instance_klass(); | |
874 if (ikl->is_loaded() && ikl->is_initialized() && !ikl->is_interface() && | |
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875 (ikl == actual_receiver || ikl->is_subtype_of(actual_receiver))) { |
0 | 876 // ikl is a same or better type than the original actual_receiver, |
877 // e.g. static receiver from bytecodes. | |
878 actual_receiver = ikl; | |
879 // Is the actual_receiver exact? | |
880 actual_receiver_is_exact = receiver_type->klass_is_exact(); | |
881 } | |
882 } | |
883 | |
884 ciInstanceKlass* calling_klass = caller->holder(); | |
885 ciMethod* cha_monomorphic_target = dest_method->find_monomorphic_target(calling_klass, klass, actual_receiver); | |
886 if (cha_monomorphic_target != NULL) { | |
887 assert(!cha_monomorphic_target->is_abstract(), ""); | |
888 // Look at the method-receiver type. Does it add "too much information"? | |
889 ciKlass* mr_klass = cha_monomorphic_target->holder(); | |
890 const Type* mr_type = TypeInstPtr::make(TypePtr::BotPTR, mr_klass); | |
891 if (receiver_type == NULL || !receiver_type->higher_equal(mr_type)) { | |
892 // Calling this method would include an implicit cast to its holder. | |
893 // %%% Not yet implemented. Would throw minor asserts at present. | |
894 // %%% The most common wins are already gained by +UseUniqueSubclasses. | |
895 // To fix, put the higher_equal check at the call of this routine, | |
896 // and add a CheckCastPP to the receiver. | |
897 if (TraceDependencies) { | |
898 tty->print_cr("found unique CHA method, but could not cast up"); | |
899 tty->print(" method = "); | |
900 cha_monomorphic_target->print(); | |
901 tty->cr(); | |
902 } | |
903 if (C->log() != NULL) { | |
904 C->log()->elem("missed_CHA_opportunity klass='%d' method='%d'", | |
905 C->log()->identify(klass), | |
906 C->log()->identify(cha_monomorphic_target)); | |
907 } | |
908 cha_monomorphic_target = NULL; | |
909 } | |
910 } | |
911 if (cha_monomorphic_target != NULL) { | |
912 // Hardwiring a virtual. | |
913 // If we inlined because CHA revealed only a single target method, | |
914 // then we are dependent on that target method not getting overridden | |
915 // by dynamic class loading. Be sure to test the "static" receiver | |
916 // dest_method here, as opposed to the actual receiver, which may | |
917 // falsely lead us to believe that the receiver is final or private. | |
918 C->dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target); | |
919 return cha_monomorphic_target; | |
920 } | |
921 | |
922 // If the type is exact, we can still bind the method w/o a vcall. | |
923 // (This case comes after CHA so we can see how much extra work it does.) | |
924 if (actual_receiver_is_exact) { | |
925 // In case of evolution, there is a dependence on every inlined method, since each | |
926 // such method can be changed when its class is redefined. | |
927 ciMethod* exact_method = dest_method->resolve_invoke(calling_klass, actual_receiver); | |
928 if (exact_method != NULL) { | |
929 #ifndef PRODUCT | |
930 if (PrintOpto) { | |
931 tty->print(" Calling method via exact type @%d --- ", bci); | |
932 exact_method->print_name(); | |
933 tty->cr(); | |
934 } | |
935 #endif | |
936 return exact_method; | |
937 } | |
938 } | |
939 | |
940 return NULL; | |
941 } |