Mercurial > hg > truffle
annotate src/share/vm/opto/doCall.cpp @ 4738:da4dd142ea01
Merge
author | bobv |
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date | Tue, 29 Nov 2011 14:44:44 -0500 |
parents | aa67216400d3 |
children | a04a201f0f5a |
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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 CallGenerator* cg = CallGenerator::for_invokedynamic_inline(call_site, jvms, caller, call_method, profile); |
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140 if (cg != NULL) { |
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141 return cg; |
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142 } |
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143 // If something failed, generate a normal dynamic call. |
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144 return CallGenerator::for_dynamic_call(call_method); |
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145 } |
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146 } |
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147 |
0 | 148 // Do not inline strict fp into non-strict code, or the reverse |
149 bool caller_method_is_strict = jvms->method()->is_strict(); | |
150 if( caller_method_is_strict ^ call_method->is_strict() ) { | |
151 allow_inline = false; | |
152 } | |
153 | |
154 // Attempt to inline... | |
155 if (allow_inline) { | |
156 // The profile data is only partly attributable to this caller, | |
157 // scale back the call site information. | |
158 float past_uses = jvms->method()->scale_count(site_count, prof_factor); | |
159 // This is the number of times we expect the call code to be used. | |
160 float expected_uses = past_uses; | |
161 | |
162 // Try inlining a bytecoded method: | |
163 if (!call_is_virtual) { | |
164 InlineTree* ilt; | |
165 if (UseOldInlining) { | |
166 ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method()); | |
167 } else { | |
168 // Make a disembodied, stateless ILT. | |
169 // TO DO: When UseOldInlining is removed, copy the ILT code elsewhere. | |
170 float site_invoke_ratio = prof_factor; | |
171 // Note: ilt is for the root of this parse, not the present call site. | |
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172 ilt = new InlineTree(this, jvms->method(), jvms->caller(), site_invoke_ratio, MaxInlineLevel); |
0 | 173 } |
174 WarmCallInfo scratch_ci; | |
175 if (!UseOldInlining) | |
176 scratch_ci.init(jvms, call_method, profile, prof_factor); | |
177 WarmCallInfo* ci = ilt->ok_to_inline(call_method, jvms, profile, &scratch_ci); | |
178 assert(ci != &scratch_ci, "do not let this pointer escape"); | |
179 bool allow_inline = (ci != NULL && !ci->is_cold()); | |
180 bool require_inline = (allow_inline && ci->is_hot()); | |
181 | |
182 if (allow_inline) { | |
183 CallGenerator* cg = CallGenerator::for_inline(call_method, expected_uses); | |
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184 if (require_inline && cg != NULL && should_delay_inlining(call_method, jvms)) { |
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185 // Delay the inlining of this method to give us the |
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186 // opportunity to perform some high level optimizations |
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187 // first. |
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188 return CallGenerator::for_late_inline(call_method, cg); |
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189 } |
0 | 190 if (cg == NULL) { |
191 // Fall through. | |
192 } else if (require_inline || !InlineWarmCalls) { | |
193 return cg; | |
194 } else { | |
195 CallGenerator* cold_cg = call_generator(call_method, vtable_index, call_is_virtual, jvms, false, prof_factor); | |
196 return CallGenerator::for_warm_call(ci, cold_cg, cg); | |
197 } | |
198 } | |
199 } | |
200 | |
201 // Try using the type profile. | |
202 if (call_is_virtual && site_count > 0 && receiver_count > 0) { | |
203 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count. | |
204 bool have_major_receiver = (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent); | |
205 ciMethod* receiver_method = NULL; | |
206 if (have_major_receiver || profile.morphism() == 1 || | |
207 (profile.morphism() == 2 && UseBimorphicInlining)) { | |
208 // receiver_method = profile.method(); | |
209 // Profiles do not suggest methods now. Look it up in the major receiver. | |
210 receiver_method = call_method->resolve_invoke(jvms->method()->holder(), | |
211 profile.receiver(0)); | |
212 } | |
213 if (receiver_method != NULL) { | |
214 // The single majority receiver sufficiently outweighs the minority. | |
215 CallGenerator* hit_cg = this->call_generator(receiver_method, | |
216 vtable_index, !call_is_virtual, jvms, allow_inline, prof_factor); | |
217 if (hit_cg != NULL) { | |
218 // Look up second receiver. | |
219 CallGenerator* next_hit_cg = NULL; | |
220 ciMethod* next_receiver_method = NULL; | |
221 if (profile.morphism() == 2 && UseBimorphicInlining) { | |
222 next_receiver_method = call_method->resolve_invoke(jvms->method()->holder(), | |
223 profile.receiver(1)); | |
224 if (next_receiver_method != NULL) { | |
225 next_hit_cg = this->call_generator(next_receiver_method, | |
226 vtable_index, !call_is_virtual, jvms, | |
227 allow_inline, prof_factor); | |
228 if (next_hit_cg != NULL && !next_hit_cg->is_inline() && | |
229 have_major_receiver && UseOnlyInlinedBimorphic) { | |
230 // Skip if we can't inline second receiver's method | |
231 next_hit_cg = NULL; | |
232 } | |
233 } | |
234 } | |
235 CallGenerator* miss_cg; | |
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236 Deoptimization::DeoptReason reason = (profile.morphism() == 2) ? |
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237 Deoptimization::Reason_bimorphic : |
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238 Deoptimization::Reason_class_check; |
0 | 239 if (( profile.morphism() == 1 || |
240 (profile.morphism() == 2 && next_hit_cg != NULL) ) && | |
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241 !too_many_traps(jvms->method(), jvms->bci(), reason) |
0 | 242 ) { |
243 // Generate uncommon trap for class check failure path | |
244 // in case of monomorphic or bimorphic virtual call site. | |
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245 miss_cg = CallGenerator::for_uncommon_trap(call_method, reason, |
0 | 246 Deoptimization::Action_maybe_recompile); |
247 } else { | |
248 // Generate virtual call for class check failure path | |
249 // in case of polymorphic virtual call site. | |
250 miss_cg = CallGenerator::for_virtual_call(call_method, vtable_index); | |
251 } | |
252 if (miss_cg != NULL) { | |
253 if (next_hit_cg != NULL) { | |
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254 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 | 255 // We don't need to record dependency on a receiver here and below. |
256 // Whenever we inline, the dependency is added by Parse::Parse(). | |
257 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX); | |
258 } | |
259 if (miss_cg != NULL) { | |
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260 NOT_PRODUCT(trace_type_profile(jvms->method(), jvms->depth() - 1, jvms->bci(), receiver_method, profile.receiver(0), site_count, receiver_count)); |
0 | 261 cg = CallGenerator::for_predicted_call(profile.receiver(0), miss_cg, hit_cg, profile.receiver_prob(0)); |
262 if (cg != NULL) return cg; | |
263 } | |
264 } | |
265 } | |
266 } | |
267 } | |
268 } | |
269 | |
270 // There was no special inlining tactic, or it bailed out. | |
271 // Use a more generic tactic, like a simple call. | |
272 if (call_is_virtual) { | |
273 return CallGenerator::for_virtual_call(call_method, vtable_index); | |
274 } else { | |
275 // Class Hierarchy Analysis or Type Profile reveals a unique target, | |
276 // or it is a static or special call. | |
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277 return CallGenerator::for_direct_call(call_method, should_delay_inlining(call_method, jvms)); |
0 | 278 } |
279 } | |
280 | |
1080
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281 // Return true for methods that shouldn't be inlined early so that |
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282 // they are easier to analyze and optimize as intrinsics. |
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283 bool Compile::should_delay_inlining(ciMethod* call_method, JVMState* jvms) { |
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284 if (has_stringbuilder()) { |
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285 |
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286 if ((call_method->holder() == C->env()->StringBuilder_klass() || |
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287 call_method->holder() == C->env()->StringBuffer_klass()) && |
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288 (jvms->method()->holder() == C->env()->StringBuilder_klass() || |
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289 jvms->method()->holder() == C->env()->StringBuffer_klass())) { |
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290 // Delay SB calls only when called from non-SB code |
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291 return false; |
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292 } |
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293 |
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294 switch (call_method->intrinsic_id()) { |
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295 case vmIntrinsics::_StringBuilder_void: |
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296 case vmIntrinsics::_StringBuilder_int: |
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297 case vmIntrinsics::_StringBuilder_String: |
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298 case vmIntrinsics::_StringBuilder_append_char: |
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299 case vmIntrinsics::_StringBuilder_append_int: |
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300 case vmIntrinsics::_StringBuilder_append_String: |
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301 case vmIntrinsics::_StringBuilder_toString: |
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302 case vmIntrinsics::_StringBuffer_void: |
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303 case vmIntrinsics::_StringBuffer_int: |
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304 case vmIntrinsics::_StringBuffer_String: |
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305 case vmIntrinsics::_StringBuffer_append_char: |
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306 case vmIntrinsics::_StringBuffer_append_int: |
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307 case vmIntrinsics::_StringBuffer_append_String: |
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308 case vmIntrinsics::_StringBuffer_toString: |
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309 case vmIntrinsics::_Integer_toString: |
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310 return true; |
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311 |
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312 case vmIntrinsics::_String_String: |
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313 { |
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314 Node* receiver = jvms->map()->in(jvms->argoff() + 1); |
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315 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) { |
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316 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava(); |
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317 ciMethod* m = csj->method(); |
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318 if (m != NULL && |
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319 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString || |
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320 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString)) |
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321 // Delay String.<init>(new SB()) |
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322 return true; |
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323 } |
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324 return false; |
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325 } |
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326 |
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327 default: |
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328 return false; |
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329 } |
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330 } |
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331 return false; |
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332 } |
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333 |
0 | 334 |
335 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link | |
336 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) { | |
337 // Additional inputs to consider... | |
338 // bc = bc() | |
339 // caller = method() | |
340 // iter().get_method_holder_index() | |
341 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" ); | |
342 // Interface classes can be loaded & linked and never get around to | |
343 // being initialized. Uncommon-trap for not-initialized static or | |
344 // v-calls. Let interface calls happen. | |
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345 ciInstanceKlass* holder_klass = dest_method->holder(); |
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346 if (!holder_klass->is_being_initialized() && |
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347 !holder_klass->is_initialized() && |
0 | 348 !holder_klass->is_interface()) { |
349 uncommon_trap(Deoptimization::Reason_uninitialized, | |
350 Deoptimization::Action_reinterpret, | |
351 holder_klass); | |
352 return true; | |
353 } | |
354 | |
355 assert(dest_method->will_link(method()->holder(), klass, bc()), "dest_method: typeflow responsibility"); | |
356 return false; | |
357 } | |
358 | |
359 | |
360 //------------------------------do_call---------------------------------------- | |
361 // Handle your basic call. Inline if we can & want to, else just setup call. | |
362 void Parse::do_call() { | |
363 // It's likely we are going to add debug info soon. | |
364 // Also, if we inline a guy who eventually needs debug info for this JVMS, | |
365 // our contribution to it is cleaned up right here. | |
366 kill_dead_locals(); | |
367 | |
368 // Set frequently used booleans | |
369 bool is_virtual = bc() == Bytecodes::_invokevirtual; | |
370 bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface; | |
371 bool has_receiver = is_virtual_or_interface || bc() == Bytecodes::_invokespecial; | |
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372 bool is_invokedynamic = bc() == Bytecodes::_invokedynamic; |
0 | 373 |
374 // Find target being called | |
375 bool will_link; | |
376 ciMethod* dest_method = iter().get_method(will_link); | |
377 ciInstanceKlass* holder_klass = dest_method->holder(); | |
378 ciKlass* holder = iter().get_declared_method_holder(); | |
379 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder); | |
380 | |
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381 int nargs = dest_method->arg_size(); |
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382 if (is_invokedynamic) nargs -= 1; |
0 | 383 |
384 // uncommon-trap when callee is unloaded, uninitialized or will not link | |
385 // bailout when too many arguments for register representation | |
386 if (!will_link || can_not_compile_call_site(dest_method, klass)) { | |
387 #ifndef PRODUCT | |
388 if (PrintOpto && (Verbose || WizardMode)) { | |
389 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci()); | |
390 dest_method->print_name(); tty->cr(); | |
391 } | |
392 #endif | |
393 return; | |
394 } | |
395 assert(holder_klass->is_loaded(), ""); | |
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396 assert((dest_method->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); |
0 | 397 // Note: this takes into account invokeinterface of methods declared in java/lang/Object, |
398 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces | |
399 assert(holder_klass->is_interface() || holder_klass->super() == NULL || (bc() != Bytecodes::_invokeinterface), "must match bc"); | |
400 // Note: In the absence of miranda methods, an abstract class K can perform | |
401 // an invokevirtual directly on an interface method I.m if K implements I. | |
402 | |
403 // --------------------- | |
404 // Does Class Hierarchy Analysis reveal only a single target of a v-call? | |
405 // Then we may inline or make a static call, but become dependent on there being only 1 target. | |
406 // Does the call-site type profile reveal only one receiver? | |
407 // Then we may introduce a run-time check and inline on the path where it succeeds. | |
408 // The other path may uncommon_trap, check for another receiver, or do a v-call. | |
409 | |
410 // Choose call strategy. | |
411 bool call_is_virtual = is_virtual_or_interface; | |
412 int vtable_index = methodOopDesc::invalid_vtable_index; | |
413 ciMethod* call_method = dest_method; | |
414 | |
415 // Try to get the most accurate receiver type | |
416 if (is_virtual_or_interface) { | |
417 Node* receiver_node = stack(sp() - nargs); | |
418 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr(); | |
419 ciMethod* optimized_virtual_method = optimize_inlining(method(), bci(), klass, dest_method, receiver_type); | |
420 | |
421 // Have the call been sufficiently improved such that it is no longer a virtual? | |
422 if (optimized_virtual_method != NULL) { | |
423 call_method = optimized_virtual_method; | |
424 call_is_virtual = false; | |
425 } else if (!UseInlineCaches && is_virtual && call_method->is_loaded()) { | |
426 // We can make a vtable call at this site | |
427 vtable_index = call_method->resolve_vtable_index(method()->holder(), klass); | |
428 } | |
429 } | |
430 | |
431 // Note: It's OK to try to inline a virtual call. | |
432 // The call generator will not attempt to inline a polymorphic call | |
433 // unless it knows how to optimize the receiver dispatch. | |
434 bool try_inline = (C->do_inlining() || InlineAccessors); | |
435 | |
436 // --------------------- | |
437 inc_sp(- nargs); // Temporarily pop args for JVM state of call | |
438 JVMState* jvms = sync_jvms(); | |
439 | |
440 // --------------------- | |
441 // Decide call tactic. | |
442 // This call checks with CHA, the interpreter profile, intrinsics table, etc. | |
443 // It decides whether inlining is desirable or not. | |
444 CallGenerator* cg = C->call_generator(call_method, vtable_index, call_is_virtual, jvms, try_inline, prof_factor()); | |
445 | |
446 // --------------------- | |
447 // Round double arguments before call | |
448 round_double_arguments(dest_method); | |
449 | |
450 #ifndef PRODUCT | |
451 // bump global counters for calls | |
452 count_compiled_calls(false/*at_method_entry*/, cg->is_inline()); | |
453 | |
454 // Record first part of parsing work for this call | |
455 parse_histogram()->record_change(); | |
456 #endif // not PRODUCT | |
457 | |
458 assert(jvms == this->jvms(), "still operating on the right JVMS"); | |
459 assert(jvms_in_sync(), "jvms must carry full info into CG"); | |
460 | |
461 // save across call, for a subsequent cast_not_null. | |
462 Node* receiver = has_receiver ? argument(0) : NULL; | |
463 | |
464 // Bump method data counters (We profile *before* the call is made | |
465 // because exceptions don't return to the call site.) | |
466 profile_call(receiver); | |
467 | |
468 JVMState* new_jvms; | |
469 if ((new_jvms = cg->generate(jvms)) == NULL) { | |
470 // When inlining attempt fails (e.g., too many arguments), | |
471 // it may contaminate the current compile state, making it | |
472 // impossible to pull back and try again. Once we call | |
473 // cg->generate(), we are committed. If it fails, the whole | |
474 // compilation task is compromised. | |
475 if (failing()) return; | |
476 #ifndef PRODUCT | |
477 if (PrintOpto || PrintOptoInlining || PrintInlining) { | |
478 // Only one fall-back, so if an intrinsic fails, ignore any bytecodes. | |
479 if (cg->is_intrinsic() && call_method->code_size() > 0) { | |
480 tty->print("Bailed out of intrinsic, will not inline: "); | |
481 call_method->print_name(); tty->cr(); | |
482 } | |
483 } | |
484 #endif | |
485 // This can happen if a library intrinsic is available, but refuses | |
486 // the call site, perhaps because it did not match a pattern the | |
487 // intrinsic was expecting to optimize. The fallback position is | |
488 // to call out-of-line. | |
489 try_inline = false; // Inline tactic bailed out. | |
490 cg = C->call_generator(call_method, vtable_index, call_is_virtual, jvms, try_inline, prof_factor()); | |
491 if ((new_jvms = cg->generate(jvms)) == NULL) { | |
492 guarantee(failing(), "call failed to generate: calls should work"); | |
493 return; | |
494 } | |
495 } | |
496 | |
497 if (cg->is_inline()) { | |
67 | 498 // Accumulate has_loops estimate |
499 C->set_has_loops(C->has_loops() || call_method->has_loops()); | |
0 | 500 C->env()->notice_inlined_method(call_method); |
501 } | |
502 | |
503 // Reset parser state from [new_]jvms, which now carries results of the call. | |
504 // Return value (if any) is already pushed on the stack by the cg. | |
505 add_exception_states_from(new_jvms); | |
506 if (new_jvms->map()->control() == top()) { | |
507 stop_and_kill_map(); | |
508 } else { | |
509 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged"); | |
510 set_jvms(new_jvms); | |
511 } | |
512 | |
513 if (!stopped()) { | |
514 // This was some sort of virtual call, which did a null check for us. | |
515 // Now we can assert receiver-not-null, on the normal return path. | |
516 if (receiver != NULL && cg->is_virtual()) { | |
517 Node* cast = cast_not_null(receiver); | |
518 // %%% assert(receiver == cast, "should already have cast the receiver"); | |
519 } | |
520 | |
521 // Round double result after a call from strict to non-strict code | |
522 round_double_result(dest_method); | |
523 | |
524 // If the return type of the method is not loaded, assert that the | |
525 // value we got is a null. Otherwise, we need to recompile. | |
526 if (!dest_method->return_type()->is_loaded()) { | |
527 #ifndef PRODUCT | |
528 if (PrintOpto && (Verbose || WizardMode)) { | |
529 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci()); | |
530 dest_method->print_name(); tty->cr(); | |
531 } | |
532 #endif | |
533 if (C->log() != NULL) { | |
534 C->log()->elem("assert_null reason='return' klass='%d'", | |
535 C->log()->identify(dest_method->return_type())); | |
536 } | |
537 // If there is going to be a trap, put it at the next bytecode: | |
538 set_bci(iter().next_bci()); | |
539 do_null_assert(peek(), T_OBJECT); | |
540 set_bci(iter().cur_bci()); // put it back | |
541 } | |
542 } | |
543 | |
544 // Restart record of parsing work after possible inlining of call | |
545 #ifndef PRODUCT | |
546 parse_histogram()->set_initial_state(bc()); | |
547 #endif | |
548 } | |
549 | |
550 //---------------------------catch_call_exceptions----------------------------- | |
551 // Put a Catch and CatchProj nodes behind a just-created call. | |
552 // Send their caught exceptions to the proper handler. | |
553 // This may be used after a call to the rethrow VM stub, | |
554 // when it is needed to process unloaded exception classes. | |
555 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) { | |
556 // Exceptions are delivered through this channel: | |
557 Node* i_o = this->i_o(); | |
558 | |
559 // Add a CatchNode. | |
560 GrowableArray<int>* bcis = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, -1); | |
561 GrowableArray<const Type*>* extypes = new (C->node_arena()) GrowableArray<const Type*>(C->node_arena(), 8, 0, NULL); | |
562 GrowableArray<int>* saw_unloaded = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, 0); | |
563 | |
564 for (; !handlers.is_done(); handlers.next()) { | |
565 ciExceptionHandler* h = handlers.handler(); | |
566 int h_bci = h->handler_bci(); | |
567 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass(); | |
568 // Do not introduce unloaded exception types into the graph: | |
569 if (!h_klass->is_loaded()) { | |
570 if (saw_unloaded->contains(h_bci)) { | |
571 /* We've already seen an unloaded exception with h_bci, | |
572 so don't duplicate. Duplication will cause the CatchNode to be | |
573 unnecessarily large. See 4713716. */ | |
574 continue; | |
575 } else { | |
576 saw_unloaded->append(h_bci); | |
577 } | |
578 } | |
579 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass); | |
580 // (We use make_from_klass because it respects UseUniqueSubclasses.) | |
581 h_extype = h_extype->join(TypeInstPtr::NOTNULL); | |
582 assert(!h_extype->empty(), "sanity"); | |
583 // Note: It's OK if the BCIs repeat themselves. | |
584 bcis->append(h_bci); | |
585 extypes->append(h_extype); | |
586 } | |
587 | |
588 int len = bcis->length(); | |
589 CatchNode *cn = new (C, 2) CatchNode(control(), i_o, len+1); | |
590 Node *catch_ = _gvn.transform(cn); | |
591 | |
592 // now branch with the exception state to each of the (potential) | |
593 // handlers | |
594 for(int i=0; i < len; i++) { | |
595 // Setup JVM state to enter the handler. | |
596 PreserveJVMState pjvms(this); | |
597 // Locals are just copied from before the call. | |
598 // Get control from the CatchNode. | |
599 int handler_bci = bcis->at(i); | |
600 Node* ctrl = _gvn.transform( new (C, 1) CatchProjNode(catch_, i+1,handler_bci)); | |
601 // This handler cannot happen? | |
602 if (ctrl == top()) continue; | |
603 set_control(ctrl); | |
604 | |
605 // Create exception oop | |
606 const TypeInstPtr* extype = extypes->at(i)->is_instptr(); | |
607 Node *ex_oop = _gvn.transform(new (C, 2) CreateExNode(extypes->at(i), ctrl, i_o)); | |
608 | |
609 // Handle unloaded exception classes. | |
610 if (saw_unloaded->contains(handler_bci)) { | |
611 // An unloaded exception type is coming here. Do an uncommon trap. | |
612 #ifndef PRODUCT | |
613 // We do not expect the same handler bci to take both cold unloaded | |
614 // and hot loaded exceptions. But, watch for it. | |
615 if (extype->is_loaded()) { | |
616 tty->print_cr("Warning: Handler @%d takes mixed loaded/unloaded exceptions in "); | |
617 method()->print_name(); tty->cr(); | |
618 } else if (PrintOpto && (Verbose || WizardMode)) { | |
619 tty->print("Bailing out on unloaded exception type "); | |
620 extype->klass()->print_name(); | |
621 tty->print(" at bci:%d in ", bci()); | |
622 method()->print_name(); tty->cr(); | |
623 } | |
624 #endif | |
625 // Emit an uncommon trap instead of processing the block. | |
626 set_bci(handler_bci); | |
627 push_ex_oop(ex_oop); | |
628 uncommon_trap(Deoptimization::Reason_unloaded, | |
629 Deoptimization::Action_reinterpret, | |
630 extype->klass(), "!loaded exception"); | |
631 set_bci(iter().cur_bci()); // put it back | |
632 continue; | |
633 } | |
634 | |
635 // go to the exception handler | |
636 if (handler_bci < 0) { // merge with corresponding rethrow node | |
637 throw_to_exit(make_exception_state(ex_oop)); | |
638 } else { // Else jump to corresponding handle | |
639 push_ex_oop(ex_oop); // Clear stack and push just the oop. | |
640 merge_exception(handler_bci); | |
641 } | |
642 } | |
643 | |
644 // The first CatchProj is for the normal return. | |
645 // (Note: If this is a call to rethrow_Java, this node goes dead.) | |
646 set_control(_gvn.transform( new (C, 1) CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci))); | |
647 } | |
648 | |
649 | |
650 //----------------------------catch_inline_exceptions-------------------------- | |
651 // Handle all exceptions thrown by an inlined method or individual bytecode. | |
652 // Common case 1: we have no handler, so all exceptions merge right into | |
653 // the rethrow case. | |
654 // Case 2: we have some handlers, with loaded exception klasses that have | |
655 // no subklasses. We do a Deutsch-Shiffman style type-check on the incoming | |
656 // exception oop and branch to the handler directly. | |
657 // Case 3: We have some handlers with subklasses or are not loaded at | |
658 // compile-time. We have to call the runtime to resolve the exception. | |
659 // So we insert a RethrowCall and all the logic that goes with it. | |
660 void Parse::catch_inline_exceptions(SafePointNode* ex_map) { | |
661 // Caller is responsible for saving away the map for normal control flow! | |
662 assert(stopped(), "call set_map(NULL) first"); | |
663 assert(method()->has_exception_handlers(), "don't come here w/o work to do"); | |
664 | |
665 Node* ex_node = saved_ex_oop(ex_map); | |
666 if (ex_node == top()) { | |
667 // No action needed. | |
668 return; | |
669 } | |
670 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr(); | |
671 NOT_PRODUCT(if (ex_type==NULL) tty->print_cr("*** Exception not InstPtr")); | |
672 if (ex_type == NULL) | |
673 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr(); | |
674 | |
675 // determine potential exception handlers | |
676 ciExceptionHandlerStream handlers(method(), bci(), | |
677 ex_type->klass()->as_instance_klass(), | |
678 ex_type->klass_is_exact()); | |
679 | |
680 // Start executing from the given throw state. (Keep its stack, for now.) | |
681 // Get the exception oop as known at compile time. | |
682 ex_node = use_exception_state(ex_map); | |
683 | |
684 // Get the exception oop klass from its header | |
685 Node* ex_klass_node = NULL; | |
686 if (has_ex_handler() && !ex_type->klass_is_exact()) { | |
687 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes()); | |
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688 ex_klass_node = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 689 |
690 // Compute the exception klass a little more cleverly. | |
691 // Obvious solution is to simple do a LoadKlass from the 'ex_node'. | |
692 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for | |
693 // each arm of the Phi. If I know something clever about the exceptions | |
694 // I'm loading the class from, I can replace the LoadKlass with the | |
695 // klass constant for the exception oop. | |
696 if( ex_node->is_Phi() ) { | |
697 ex_klass_node = new (C, ex_node->req()) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT ); | |
698 for( uint i = 1; i < ex_node->req(); i++ ) { | |
699 Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() ); | |
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700 Node* k = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) ); |
0 | 701 ex_klass_node->init_req( i, k ); |
702 } | |
703 _gvn.set_type(ex_klass_node, TypeKlassPtr::OBJECT); | |
704 | |
705 } | |
706 } | |
707 | |
708 // Scan the exception table for applicable handlers. | |
709 // If none, we can call rethrow() and be done! | |
710 // If precise (loaded with no subklasses), insert a D.S. style | |
711 // pointer compare to the correct handler and loop back. | |
712 // If imprecise, switch to the Rethrow VM-call style handling. | |
713 | |
714 int remaining = handlers.count_remaining(); | |
715 | |
716 // iterate through all entries sequentially | |
717 for (;!handlers.is_done(); handlers.next()) { | |
718 ciExceptionHandler* handler = handlers.handler(); | |
719 | |
720 if (handler->is_rethrow()) { | |
721 // If we fell off the end of the table without finding an imprecise | |
722 // exception klass (and without finding a generic handler) then we | |
723 // know this exception is not handled in this method. We just rethrow | |
724 // the exception into the caller. | |
725 throw_to_exit(make_exception_state(ex_node)); | |
726 return; | |
727 } | |
728 | |
729 // exception handler bci range covers throw_bci => investigate further | |
730 int handler_bci = handler->handler_bci(); | |
731 | |
732 if (remaining == 1) { | |
733 push_ex_oop(ex_node); // Push exception oop for handler | |
734 #ifndef PRODUCT | |
735 if (PrintOpto && WizardMode) { | |
736 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci); | |
737 } | |
738 #endif | |
739 merge_exception(handler_bci); // jump to handler | |
740 return; // No more handling to be done here! | |
741 } | |
742 | |
1344 | 743 // Get the handler's klass |
0 | 744 ciInstanceKlass* klass = handler->catch_klass(); |
1344 | 745 |
746 if (!klass->is_loaded()) { // klass is not loaded? | |
747 // fall through into catch_call_exceptions which will emit a | |
748 // handler with an uncommon trap. | |
749 break; | |
0 | 750 } |
751 | |
752 if (klass->is_interface()) // should not happen, but... | |
753 break; // bail out | |
754 | |
1344 | 755 // Check the type of the exception against the catch type |
0 | 756 const TypeKlassPtr *tk = TypeKlassPtr::make(klass); |
757 Node* con = _gvn.makecon(tk); | |
1344 | 758 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con); |
759 if (!stopped()) { | |
760 PreserveJVMState pjvms(this); | |
761 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr(); | |
762 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness"); | |
0 | 763 Node* ex_oop = _gvn.transform(new (C, 2) CheckCastPPNode(control(), ex_node, tinst)); |
764 push_ex_oop(ex_oop); // Push exception oop for handler | |
765 #ifndef PRODUCT | |
766 if (PrintOpto && WizardMode) { | |
767 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci); | |
768 klass->print_name(); | |
769 tty->cr(); | |
770 } | |
771 #endif | |
772 merge_exception(handler_bci); | |
773 } | |
1344 | 774 set_control(not_subtype_ctrl); |
0 | 775 |
776 // Come here if exception does not match handler. | |
777 // Carry on with more handler checks. | |
778 --remaining; | |
779 } | |
780 | |
781 assert(!stopped(), "you should return if you finish the chain"); | |
782 | |
783 // Oops, need to call into the VM to resolve the klasses at runtime. | |
784 // Note: This call must not deoptimize, since it is not a real at this bci! | |
785 kill_dead_locals(); | |
786 | |
787 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW, | |
788 OptoRuntime::rethrow_Type(), | |
789 OptoRuntime::rethrow_stub(), | |
790 NULL, NULL, | |
791 ex_node); | |
792 | |
793 // Rethrow is a pure call, no side effects, only a result. | |
794 // The result cannot be allocated, so we use I_O | |
795 | |
796 // Catch exceptions from the rethrow | |
797 catch_call_exceptions(handlers); | |
798 } | |
799 | |
800 | |
801 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.) | |
802 | |
803 | |
804 #ifndef PRODUCT | |
805 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) { | |
806 if( CountCompiledCalls ) { | |
807 if( at_method_entry ) { | |
808 // bump invocation counter if top method (for statistics) | |
809 if (CountCompiledCalls && depth() == 1) { | |
810 const TypeInstPtr* addr_type = TypeInstPtr::make(method()); | |
811 Node* adr1 = makecon(addr_type); | |
812 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(methodOopDesc::compiled_invocation_counter_offset())); | |
813 increment_counter(adr2); | |
814 } | |
815 } else if (is_inline) { | |
816 switch (bc()) { | |
817 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break; | |
818 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break; | |
819 case Bytecodes::_invokestatic: | |
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820 case Bytecodes::_invokedynamic: |
0 | 821 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break; |
822 default: fatal("unexpected call bytecode"); | |
823 } | |
824 } else { | |
825 switch (bc()) { | |
826 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break; | |
827 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break; | |
828 case Bytecodes::_invokestatic: | |
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829 case Bytecodes::_invokedynamic: |
0 | 830 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break; |
831 default: fatal("unexpected call bytecode"); | |
832 } | |
833 } | |
834 } | |
835 } | |
836 #endif //PRODUCT | |
837 | |
838 | |
839 // Identify possible target method and inlining style | |
840 ciMethod* Parse::optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass, | |
841 ciMethod *dest_method, const TypeOopPtr* receiver_type) { | |
842 // only use for virtual or interface calls | |
843 | |
844 // If it is obviously final, do not bother to call find_monomorphic_target, | |
845 // because the class hierarchy checks are not needed, and may fail due to | |
846 // incompletely loaded classes. Since we do our own class loading checks | |
847 // in this module, we may confidently bind to any method. | |
848 if (dest_method->can_be_statically_bound()) { | |
849 return dest_method; | |
850 } | |
851 | |
852 // Attempt to improve the receiver | |
853 bool actual_receiver_is_exact = false; | |
854 ciInstanceKlass* actual_receiver = klass; | |
855 if (receiver_type != NULL) { | |
856 // Array methods are all inherited from Object, and are monomorphic. | |
857 if (receiver_type->isa_aryptr() && | |
858 dest_method->holder() == env()->Object_klass()) { | |
859 return dest_method; | |
860 } | |
861 | |
862 // All other interesting cases are instance klasses. | |
863 if (!receiver_type->isa_instptr()) { | |
864 return NULL; | |
865 } | |
866 | |
867 ciInstanceKlass *ikl = receiver_type->klass()->as_instance_klass(); | |
868 if (ikl->is_loaded() && ikl->is_initialized() && !ikl->is_interface() && | |
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869 (ikl == actual_receiver || ikl->is_subtype_of(actual_receiver))) { |
0 | 870 // ikl is a same or better type than the original actual_receiver, |
871 // e.g. static receiver from bytecodes. | |
872 actual_receiver = ikl; | |
873 // Is the actual_receiver exact? | |
874 actual_receiver_is_exact = receiver_type->klass_is_exact(); | |
875 } | |
876 } | |
877 | |
878 ciInstanceKlass* calling_klass = caller->holder(); | |
879 ciMethod* cha_monomorphic_target = dest_method->find_monomorphic_target(calling_klass, klass, actual_receiver); | |
880 if (cha_monomorphic_target != NULL) { | |
881 assert(!cha_monomorphic_target->is_abstract(), ""); | |
882 // Look at the method-receiver type. Does it add "too much information"? | |
883 ciKlass* mr_klass = cha_monomorphic_target->holder(); | |
884 const Type* mr_type = TypeInstPtr::make(TypePtr::BotPTR, mr_klass); | |
885 if (receiver_type == NULL || !receiver_type->higher_equal(mr_type)) { | |
886 // Calling this method would include an implicit cast to its holder. | |
887 // %%% Not yet implemented. Would throw minor asserts at present. | |
888 // %%% The most common wins are already gained by +UseUniqueSubclasses. | |
889 // To fix, put the higher_equal check at the call of this routine, | |
890 // and add a CheckCastPP to the receiver. | |
891 if (TraceDependencies) { | |
892 tty->print_cr("found unique CHA method, but could not cast up"); | |
893 tty->print(" method = "); | |
894 cha_monomorphic_target->print(); | |
895 tty->cr(); | |
896 } | |
897 if (C->log() != NULL) { | |
898 C->log()->elem("missed_CHA_opportunity klass='%d' method='%d'", | |
899 C->log()->identify(klass), | |
900 C->log()->identify(cha_monomorphic_target)); | |
901 } | |
902 cha_monomorphic_target = NULL; | |
903 } | |
904 } | |
905 if (cha_monomorphic_target != NULL) { | |
906 // Hardwiring a virtual. | |
907 // If we inlined because CHA revealed only a single target method, | |
908 // then we are dependent on that target method not getting overridden | |
909 // by dynamic class loading. Be sure to test the "static" receiver | |
910 // dest_method here, as opposed to the actual receiver, which may | |
911 // falsely lead us to believe that the receiver is final or private. | |
912 C->dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target); | |
913 return cha_monomorphic_target; | |
914 } | |
915 | |
916 // If the type is exact, we can still bind the method w/o a vcall. | |
917 // (This case comes after CHA so we can see how much extra work it does.) | |
918 if (actual_receiver_is_exact) { | |
919 // In case of evolution, there is a dependence on every inlined method, since each | |
920 // such method can be changed when its class is redefined. | |
921 ciMethod* exact_method = dest_method->resolve_invoke(calling_klass, actual_receiver); | |
922 if (exact_method != NULL) { | |
923 #ifndef PRODUCT | |
924 if (PrintOpto) { | |
925 tty->print(" Calling method via exact type @%d --- ", bci); | |
926 exact_method->print_name(); | |
927 tty->cr(); | |
928 } | |
929 #endif | |
930 return exact_method; | |
931 } | |
932 } | |
933 | |
934 return NULL; | |
935 } |