Mercurial > hg > truffle
annotate src/share/vm/opto/callGenerator.cpp @ 6290:01d274503562
canonicalize reads and writes on null objects to deopts
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Tue, 28 Aug 2012 12:15:10 +0200 |
parents | 6c5b7a6becc8 |
children | 7a302948f5a4 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "ci/bcEscapeAnalyzer.hpp" | |
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27 #include "ci/ciCallSite.hpp" |
1972 | 28 #include "ci/ciCPCache.hpp" |
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29 #include "ci/ciMemberName.hpp" |
1972 | 30 #include "ci/ciMethodHandle.hpp" |
31 #include "classfile/javaClasses.hpp" | |
32 #include "compiler/compileLog.hpp" | |
33 #include "opto/addnode.hpp" | |
34 #include "opto/callGenerator.hpp" | |
35 #include "opto/callnode.hpp" | |
36 #include "opto/cfgnode.hpp" | |
37 #include "opto/connode.hpp" | |
38 #include "opto/parse.hpp" | |
39 #include "opto/rootnode.hpp" | |
40 #include "opto/runtime.hpp" | |
41 #include "opto/subnode.hpp" | |
0 | 42 |
43 | |
44 // Utility function. | |
45 const TypeFunc* CallGenerator::tf() const { | |
46 return TypeFunc::make(method()); | |
47 } | |
48 | |
49 //-----------------------------ParseGenerator--------------------------------- | |
50 // Internal class which handles all direct bytecode traversal. | |
51 class ParseGenerator : public InlineCallGenerator { | |
52 private: | |
53 bool _is_osr; | |
54 float _expected_uses; | |
55 | |
56 public: | |
57 ParseGenerator(ciMethod* method, float expected_uses, bool is_osr = false) | |
58 : InlineCallGenerator(method) | |
59 { | |
60 _is_osr = is_osr; | |
61 _expected_uses = expected_uses; | |
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62 assert(InlineTree::check_can_parse(method) == NULL, "parse must be possible"); |
0 | 63 } |
64 | |
65 virtual bool is_parse() const { return true; } | |
66 virtual JVMState* generate(JVMState* jvms); | |
67 int is_osr() { return _is_osr; } | |
68 | |
69 }; | |
70 | |
71 JVMState* ParseGenerator::generate(JVMState* jvms) { | |
72 Compile* C = Compile::current(); | |
73 | |
74 if (is_osr()) { | |
75 // The JVMS for a OSR has a single argument (see its TypeFunc). | |
76 assert(jvms->depth() == 1, "no inline OSR"); | |
77 } | |
78 | |
79 if (C->failing()) { | |
80 return NULL; // bailing out of the compile; do not try to parse | |
81 } | |
82 | |
83 Parse parser(jvms, method(), _expected_uses); | |
84 // Grab signature for matching/allocation | |
85 #ifdef ASSERT | |
86 if (parser.tf() != (parser.depth() == 1 ? C->tf() : tf())) { | |
87 MutexLockerEx ml(Compile_lock, Mutex::_no_safepoint_check_flag); | |
88 assert(C->env()->system_dictionary_modification_counter_changed(), | |
89 "Must invalidate if TypeFuncs differ"); | |
90 } | |
91 #endif | |
92 | |
93 GraphKit& exits = parser.exits(); | |
94 | |
95 if (C->failing()) { | |
96 while (exits.pop_exception_state() != NULL) ; | |
97 return NULL; | |
98 } | |
99 | |
100 assert(exits.jvms()->same_calls_as(jvms), "sanity"); | |
101 | |
102 // Simply return the exit state of the parser, | |
103 // augmented by any exceptional states. | |
104 return exits.transfer_exceptions_into_jvms(); | |
105 } | |
106 | |
107 //---------------------------DirectCallGenerator------------------------------ | |
108 // Internal class which handles all out-of-line calls w/o receiver type checks. | |
109 class DirectCallGenerator : public CallGenerator { | |
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110 private: |
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111 CallStaticJavaNode* _call_node; |
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112 // Force separate memory and I/O projections for the exceptional |
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113 // paths to facilitate late inlinig. |
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114 bool _separate_io_proj; |
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115 |
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116 public: |
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117 DirectCallGenerator(ciMethod* method, bool separate_io_proj) |
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118 : CallGenerator(method), |
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119 _separate_io_proj(separate_io_proj) |
0 | 120 { |
121 } | |
122 virtual JVMState* generate(JVMState* jvms); | |
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123 |
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124 CallStaticJavaNode* call_node() const { return _call_node; } |
0 | 125 }; |
126 | |
127 JVMState* DirectCallGenerator::generate(JVMState* jvms) { | |
128 GraphKit kit(jvms); | |
129 bool is_static = method()->is_static(); | |
130 address target = is_static ? SharedRuntime::get_resolve_static_call_stub() | |
131 : SharedRuntime::get_resolve_opt_virtual_call_stub(); | |
132 | |
133 if (kit.C->log() != NULL) { | |
134 kit.C->log()->elem("direct_call bci='%d'", jvms->bci()); | |
135 } | |
136 | |
137 CallStaticJavaNode *call = new (kit.C, tf()->domain()->cnt()) CallStaticJavaNode(tf(), target, method(), kit.bci()); | |
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138 _call_node = call; // Save the call node in case we need it later |
0 | 139 if (!is_static) { |
140 // Make an explicit receiver null_check as part of this call. | |
141 // Since we share a map with the caller, his JVMS gets adjusted. | |
142 kit.null_check_receiver(method()); | |
143 if (kit.stopped()) { | |
144 // And dump it back to the caller, decorated with any exceptions: | |
145 return kit.transfer_exceptions_into_jvms(); | |
146 } | |
147 // Mark the call node as virtual, sort of: | |
148 call->set_optimized_virtual(true); | |
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149 if (method()->is_method_handle_intrinsic() || |
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150 method()->is_compiled_lambda_form()) { |
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151 call->set_method_handle_invoke(true); |
1265 | 152 } |
0 | 153 } |
154 kit.set_arguments_for_java_call(call); | |
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155 kit.set_edges_for_java_call(call, false, _separate_io_proj); |
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156 Node* ret = kit.set_results_for_java_call(call, _separate_io_proj); |
0 | 157 kit.push_node(method()->return_type()->basic_type(), ret); |
158 return kit.transfer_exceptions_into_jvms(); | |
159 } | |
160 | |
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161 //---------------------------DynamicCallGenerator----------------------------- |
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162 // Internal class which handles all out-of-line invokedynamic calls. |
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163 class DynamicCallGenerator : public CallGenerator { |
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164 public: |
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165 DynamicCallGenerator(ciMethod* method) |
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166 : CallGenerator(method) |
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167 { |
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168 } |
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169 virtual JVMState* generate(JVMState* jvms); |
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170 }; |
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171 |
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172 JVMState* DynamicCallGenerator::generate(JVMState* jvms) { |
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173 GraphKit kit(jvms); |
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174 Compile* C = kit.C; |
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175 PhaseGVN& gvn = kit.gvn(); |
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176 |
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177 if (C->log() != NULL) { |
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178 C->log()->elem("dynamic_call bci='%d'", jvms->bci()); |
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179 } |
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180 |
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181 // Get the constant pool cache from the caller class. |
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182 ciMethod* caller_method = jvms->method(); |
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183 ciBytecodeStream str(caller_method); |
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184 str.force_bci(jvms->bci()); // Set the stream to the invokedynamic bci. |
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185 assert(str.cur_bc() == Bytecodes::_invokedynamic, "wrong place to issue a dynamic call!"); |
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186 ciCPCache* cpcache = str.get_cpcache(); |
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187 |
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188 // Get the offset of the CallSite from the constant pool cache |
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189 // pointer. |
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190 int index = str.get_method_index(); |
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191 size_t call_site_offset = cpcache->get_f1_offset(index); |
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192 |
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193 // Load the CallSite object from the constant pool cache. |
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194 const TypeOopPtr* cpcache_type = TypeOopPtr::make_from_constant(cpcache); // returns TypeAryPtr of type T_OBJECT |
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195 const TypeOopPtr* call_site_type = TypeOopPtr::make_from_klass(C->env()->CallSite_klass()); |
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196 Node* cpcache_adr = kit.makecon(cpcache_type); |
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197 Node* call_site_adr = kit.basic_plus_adr(cpcache_adr, call_site_offset); |
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198 // The oops in the constant pool cache are not compressed; load then as raw pointers. |
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199 Node* call_site = kit.make_load(kit.control(), call_site_adr, call_site_type, T_ADDRESS, Compile::AliasIdxRaw); |
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200 |
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201 // Load the target MethodHandle from the CallSite object. |
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202 const TypeOopPtr* target_type = TypeOopPtr::make_from_klass(C->env()->MethodHandle_klass()); |
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203 Node* target_mh_adr = kit.basic_plus_adr(call_site, java_lang_invoke_CallSite::target_offset_in_bytes()); |
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204 Node* target_mh = kit.make_load(kit.control(), target_mh_adr, target_type, T_OBJECT); |
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205 |
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206 address resolve_stub = SharedRuntime::get_resolve_opt_virtual_call_stub(); |
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207 |
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208 CallStaticJavaNode* call = new (C, tf()->domain()->cnt()) CallStaticJavaNode(tf(), resolve_stub, method(), kit.bci()); |
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209 // invokedynamic is treated as an optimized invokevirtual. |
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210 call->set_optimized_virtual(true); |
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211 // Take extra care (in the presence of argument motion) not to trash the SP: |
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212 call->set_method_handle_invoke(true); |
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213 |
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214 // Pass the target MethodHandle as first argument and shift the |
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215 // other arguments. |
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216 call->init_req(0 + TypeFunc::Parms, target_mh); |
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217 uint nargs = call->method()->arg_size(); |
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218 for (uint i = 1; i < nargs; i++) { |
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219 Node* arg = kit.argument(i - 1); |
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220 call->init_req(i + TypeFunc::Parms, arg); |
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221 } |
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222 |
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223 kit.set_edges_for_java_call(call); |
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224 Node* ret = kit.set_results_for_java_call(call); |
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225 kit.push_node(method()->return_type()->basic_type(), ret); |
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226 return kit.transfer_exceptions_into_jvms(); |
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227 } |
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228 |
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229 //--------------------------VirtualCallGenerator------------------------------ |
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230 // Internal class which handles all out-of-line calls checking receiver type. |
0 | 231 class VirtualCallGenerator : public CallGenerator { |
232 private: | |
233 int _vtable_index; | |
234 public: | |
235 VirtualCallGenerator(ciMethod* method, int vtable_index) | |
236 : CallGenerator(method), _vtable_index(vtable_index) | |
237 { | |
238 assert(vtable_index == methodOopDesc::invalid_vtable_index || | |
239 vtable_index >= 0, "either invalid or usable"); | |
240 } | |
241 virtual bool is_virtual() const { return true; } | |
242 virtual JVMState* generate(JVMState* jvms); | |
243 }; | |
244 | |
245 JVMState* VirtualCallGenerator::generate(JVMState* jvms) { | |
246 GraphKit kit(jvms); | |
247 Node* receiver = kit.argument(0); | |
248 | |
249 if (kit.C->log() != NULL) { | |
250 kit.C->log()->elem("virtual_call bci='%d'", jvms->bci()); | |
251 } | |
252 | |
253 // If the receiver is a constant null, do not torture the system | |
254 // by attempting to call through it. The compile will proceed | |
255 // correctly, but may bail out in final_graph_reshaping, because | |
256 // the call instruction will have a seemingly deficient out-count. | |
257 // (The bailout says something misleading about an "infinite loop".) | |
258 if (kit.gvn().type(receiver)->higher_equal(TypePtr::NULL_PTR)) { | |
259 kit.inc_sp(method()->arg_size()); // restore arguments | |
260 kit.uncommon_trap(Deoptimization::Reason_null_check, | |
261 Deoptimization::Action_none, | |
262 NULL, "null receiver"); | |
263 return kit.transfer_exceptions_into_jvms(); | |
264 } | |
265 | |
266 // Ideally we would unconditionally do a null check here and let it | |
267 // be converted to an implicit check based on profile information. | |
268 // However currently the conversion to implicit null checks in | |
269 // Block::implicit_null_check() only looks for loads and stores, not calls. | |
270 ciMethod *caller = kit.method(); | |
271 ciMethodData *caller_md = (caller == NULL) ? NULL : caller->method_data(); | |
272 if (!UseInlineCaches || !ImplicitNullChecks || | |
273 ((ImplicitNullCheckThreshold > 0) && caller_md && | |
274 (caller_md->trap_count(Deoptimization::Reason_null_check) | |
275 >= (uint)ImplicitNullCheckThreshold))) { | |
276 // Make an explicit receiver null_check as part of this call. | |
277 // Since we share a map with the caller, his JVMS gets adjusted. | |
278 receiver = kit.null_check_receiver(method()); | |
279 if (kit.stopped()) { | |
280 // And dump it back to the caller, decorated with any exceptions: | |
281 return kit.transfer_exceptions_into_jvms(); | |
282 } | |
283 } | |
284 | |
285 assert(!method()->is_static(), "virtual call must not be to static"); | |
286 assert(!method()->is_final(), "virtual call should not be to final"); | |
287 assert(!method()->is_private(), "virtual call should not be to private"); | |
288 assert(_vtable_index == methodOopDesc::invalid_vtable_index || !UseInlineCaches, | |
289 "no vtable calls if +UseInlineCaches "); | |
290 address target = SharedRuntime::get_resolve_virtual_call_stub(); | |
291 // Normal inline cache used for call | |
292 CallDynamicJavaNode *call = new (kit.C, tf()->domain()->cnt()) CallDynamicJavaNode(tf(), target, method(), _vtable_index, kit.bci()); | |
293 kit.set_arguments_for_java_call(call); | |
294 kit.set_edges_for_java_call(call); | |
295 Node* ret = kit.set_results_for_java_call(call); | |
296 kit.push_node(method()->return_type()->basic_type(), ret); | |
297 | |
298 // Represent the effect of an implicit receiver null_check | |
299 // as part of this call. Since we share a map with the caller, | |
300 // his JVMS gets adjusted. | |
301 kit.cast_not_null(receiver); | |
302 return kit.transfer_exceptions_into_jvms(); | |
303 } | |
304 | |
305 CallGenerator* CallGenerator::for_inline(ciMethod* m, float expected_uses) { | |
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306 if (InlineTree::check_can_parse(m) != NULL) return NULL; |
0 | 307 return new ParseGenerator(m, expected_uses); |
308 } | |
309 | |
310 // As a special case, the JVMS passed to this CallGenerator is | |
311 // for the method execution already in progress, not just the JVMS | |
312 // of the caller. Thus, this CallGenerator cannot be mixed with others! | |
313 CallGenerator* CallGenerator::for_osr(ciMethod* m, int osr_bci) { | |
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314 if (InlineTree::check_can_parse(m) != NULL) return NULL; |
0 | 315 float past_uses = m->interpreter_invocation_count(); |
316 float expected_uses = past_uses; | |
317 return new ParseGenerator(m, expected_uses, true); | |
318 } | |
319 | |
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320 CallGenerator* CallGenerator::for_direct_call(ciMethod* m, bool separate_io_proj) { |
0 | 321 assert(!m->is_abstract(), "for_direct_call mismatch"); |
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322 return new DirectCallGenerator(m, separate_io_proj); |
0 | 323 } |
324 | |
325 CallGenerator* CallGenerator::for_virtual_call(ciMethod* m, int vtable_index) { | |
326 assert(!m->is_static(), "for_virtual_call mismatch"); | |
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327 assert(!m->is_method_handle_intrinsic(), "should be a direct call"); |
0 | 328 return new VirtualCallGenerator(m, vtable_index); |
329 } | |
330 | |
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331 CallGenerator* CallGenerator::for_dynamic_call(ciMethod* m) { |
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332 assert(m->is_compiled_lambda_form(), "for_dynamic_call mismatch"); |
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333 //@@ FIXME: this should be done via a direct call |
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334 return new DynamicCallGenerator(m); |
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335 } |
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336 |
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337 // Allow inlining decisions to be delayed |
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338 class LateInlineCallGenerator : public DirectCallGenerator { |
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339 CallGenerator* _inline_cg; |
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340 |
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341 public: |
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342 LateInlineCallGenerator(ciMethod* method, CallGenerator* inline_cg) : |
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343 DirectCallGenerator(method, true), _inline_cg(inline_cg) {} |
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344 |
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345 virtual bool is_late_inline() const { return true; } |
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346 |
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347 // Convert the CallStaticJava into an inline |
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348 virtual void do_late_inline(); |
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349 |
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350 JVMState* generate(JVMState* jvms) { |
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351 // Record that this call site should be revisited once the main |
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352 // parse is finished. |
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353 Compile::current()->add_late_inline(this); |
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354 |
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355 // Emit the CallStaticJava and request separate projections so |
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356 // that the late inlining logic can distinguish between fall |
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357 // through and exceptional uses of the memory and io projections |
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358 // as is done for allocations and macro expansion. |
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359 return DirectCallGenerator::generate(jvms); |
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360 } |
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361 |
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362 }; |
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363 |
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364 |
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365 void LateInlineCallGenerator::do_late_inline() { |
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366 // Can't inline it |
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367 if (call_node() == NULL || call_node()->outcnt() == 0 || |
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368 call_node()->in(0) == NULL || call_node()->in(0)->is_top()) |
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369 return; |
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370 |
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371 CallStaticJavaNode* call = call_node(); |
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372 |
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373 // Make a clone of the JVMState that appropriate to use for driving a parse |
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374 Compile* C = Compile::current(); |
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375 JVMState* jvms = call->jvms()->clone_shallow(C); |
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376 uint size = call->req(); |
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377 SafePointNode* map = new (C, size) SafePointNode(size, jvms); |
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378 for (uint i1 = 0; i1 < size; i1++) { |
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379 map->init_req(i1, call->in(i1)); |
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380 } |
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381 |
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382 // Make sure the state is a MergeMem for parsing. |
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383 if (!map->in(TypeFunc::Memory)->is_MergeMem()) { |
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384 map->set_req(TypeFunc::Memory, MergeMemNode::make(C, map->in(TypeFunc::Memory))); |
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385 } |
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386 |
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387 // Make enough space for the expression stack and transfer the incoming arguments |
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388 int nargs = method()->arg_size(); |
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389 jvms->set_map(map); |
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390 map->ensure_stack(jvms, jvms->method()->max_stack()); |
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391 if (nargs > 0) { |
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392 for (int i1 = 0; i1 < nargs; i1++) { |
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393 map->set_req(i1 + jvms->argoff(), call->in(TypeFunc::Parms + i1)); |
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394 } |
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395 } |
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396 |
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397 CompileLog* log = C->log(); |
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398 if (log != NULL) { |
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399 log->head("late_inline method='%d'", log->identify(method())); |
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400 JVMState* p = jvms; |
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401 while (p != NULL) { |
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402 log->elem("jvms bci='%d' method='%d'", p->bci(), log->identify(p->method())); |
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403 p = p->caller(); |
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404 } |
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405 log->tail("late_inline"); |
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406 } |
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407 |
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408 // Setup default node notes to be picked up by the inlining |
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409 Node_Notes* old_nn = C->default_node_notes(); |
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410 if (old_nn != NULL) { |
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411 Node_Notes* entry_nn = old_nn->clone(C); |
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412 entry_nn->set_jvms(jvms); |
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413 C->set_default_node_notes(entry_nn); |
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414 } |
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415 |
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416 // Now perform the inling using the synthesized JVMState |
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417 JVMState* new_jvms = _inline_cg->generate(jvms); |
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418 if (new_jvms == NULL) return; // no change |
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419 if (C->failing()) return; |
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420 |
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421 // Capture any exceptional control flow |
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422 GraphKit kit(new_jvms); |
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423 |
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424 // Find the result object |
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425 Node* result = C->top(); |
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426 int result_size = method()->return_type()->size(); |
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427 if (result_size != 0 && !kit.stopped()) { |
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428 result = (result_size == 1) ? kit.pop() : kit.pop_pair(); |
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429 } |
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430 |
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431 kit.replace_call(call, result); |
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432 } |
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433 |
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434 |
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435 CallGenerator* CallGenerator::for_late_inline(ciMethod* method, CallGenerator* inline_cg) { |
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436 return new LateInlineCallGenerator(method, inline_cg); |
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437 } |
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438 |
0 | 439 |
440 //---------------------------WarmCallGenerator-------------------------------- | |
441 // Internal class which handles initial deferral of inlining decisions. | |
442 class WarmCallGenerator : public CallGenerator { | |
443 WarmCallInfo* _call_info; | |
444 CallGenerator* _if_cold; | |
445 CallGenerator* _if_hot; | |
446 bool _is_virtual; // caches virtuality of if_cold | |
447 bool _is_inline; // caches inline-ness of if_hot | |
448 | |
449 public: | |
450 WarmCallGenerator(WarmCallInfo* ci, | |
451 CallGenerator* if_cold, | |
452 CallGenerator* if_hot) | |
453 : CallGenerator(if_cold->method()) | |
454 { | |
455 assert(method() == if_hot->method(), "consistent choices"); | |
456 _call_info = ci; | |
457 _if_cold = if_cold; | |
458 _if_hot = if_hot; | |
459 _is_virtual = if_cold->is_virtual(); | |
460 _is_inline = if_hot->is_inline(); | |
461 } | |
462 | |
463 virtual bool is_inline() const { return _is_inline; } | |
464 virtual bool is_virtual() const { return _is_virtual; } | |
465 virtual bool is_deferred() const { return true; } | |
466 | |
467 virtual JVMState* generate(JVMState* jvms); | |
468 }; | |
469 | |
470 | |
471 CallGenerator* CallGenerator::for_warm_call(WarmCallInfo* ci, | |
472 CallGenerator* if_cold, | |
473 CallGenerator* if_hot) { | |
474 return new WarmCallGenerator(ci, if_cold, if_hot); | |
475 } | |
476 | |
477 JVMState* WarmCallGenerator::generate(JVMState* jvms) { | |
478 Compile* C = Compile::current(); | |
479 if (C->log() != NULL) { | |
480 C->log()->elem("warm_call bci='%d'", jvms->bci()); | |
481 } | |
482 jvms = _if_cold->generate(jvms); | |
483 if (jvms != NULL) { | |
484 Node* m = jvms->map()->control(); | |
485 if (m->is_CatchProj()) m = m->in(0); else m = C->top(); | |
486 if (m->is_Catch()) m = m->in(0); else m = C->top(); | |
487 if (m->is_Proj()) m = m->in(0); else m = C->top(); | |
488 if (m->is_CallJava()) { | |
489 _call_info->set_call(m->as_Call()); | |
490 _call_info->set_hot_cg(_if_hot); | |
491 #ifndef PRODUCT | |
492 if (PrintOpto || PrintOptoInlining) { | |
493 tty->print_cr("Queueing for warm inlining at bci %d:", jvms->bci()); | |
494 tty->print("WCI: "); | |
495 _call_info->print(); | |
496 } | |
497 #endif | |
498 _call_info->set_heat(_call_info->compute_heat()); | |
499 C->set_warm_calls(_call_info->insert_into(C->warm_calls())); | |
500 } | |
501 } | |
502 return jvms; | |
503 } | |
504 | |
505 void WarmCallInfo::make_hot() { | |
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506 Unimplemented(); |
0 | 507 } |
508 | |
509 void WarmCallInfo::make_cold() { | |
510 // No action: Just dequeue. | |
511 } | |
512 | |
513 | |
514 //------------------------PredictedCallGenerator------------------------------ | |
515 // Internal class which handles all out-of-line calls checking receiver type. | |
516 class PredictedCallGenerator : public CallGenerator { | |
517 ciKlass* _predicted_receiver; | |
518 CallGenerator* _if_missed; | |
519 CallGenerator* _if_hit; | |
520 float _hit_prob; | |
521 | |
522 public: | |
523 PredictedCallGenerator(ciKlass* predicted_receiver, | |
524 CallGenerator* if_missed, | |
525 CallGenerator* if_hit, float hit_prob) | |
526 : CallGenerator(if_missed->method()) | |
527 { | |
528 // The call profile data may predict the hit_prob as extreme as 0 or 1. | |
529 // Remove the extremes values from the range. | |
530 if (hit_prob > PROB_MAX) hit_prob = PROB_MAX; | |
531 if (hit_prob < PROB_MIN) hit_prob = PROB_MIN; | |
532 | |
533 _predicted_receiver = predicted_receiver; | |
534 _if_missed = if_missed; | |
535 _if_hit = if_hit; | |
536 _hit_prob = hit_prob; | |
537 } | |
538 | |
539 virtual bool is_virtual() const { return true; } | |
540 virtual bool is_inline() const { return _if_hit->is_inline(); } | |
541 virtual bool is_deferred() const { return _if_hit->is_deferred(); } | |
542 | |
543 virtual JVMState* generate(JVMState* jvms); | |
544 }; | |
545 | |
546 | |
547 CallGenerator* CallGenerator::for_predicted_call(ciKlass* predicted_receiver, | |
548 CallGenerator* if_missed, | |
549 CallGenerator* if_hit, | |
550 float hit_prob) { | |
551 return new PredictedCallGenerator(predicted_receiver, if_missed, if_hit, hit_prob); | |
552 } | |
553 | |
554 | |
555 JVMState* PredictedCallGenerator::generate(JVMState* jvms) { | |
556 GraphKit kit(jvms); | |
557 PhaseGVN& gvn = kit.gvn(); | |
558 // We need an explicit receiver null_check before checking its type. | |
559 // We share a map with the caller, so his JVMS gets adjusted. | |
560 Node* receiver = kit.argument(0); | |
561 | |
562 CompileLog* log = kit.C->log(); | |
563 if (log != NULL) { | |
564 log->elem("predicted_call bci='%d' klass='%d'", | |
565 jvms->bci(), log->identify(_predicted_receiver)); | |
566 } | |
567 | |
568 receiver = kit.null_check_receiver(method()); | |
569 if (kit.stopped()) { | |
570 return kit.transfer_exceptions_into_jvms(); | |
571 } | |
572 | |
573 Node* exact_receiver = receiver; // will get updated in place... | |
574 Node* slow_ctl = kit.type_check_receiver(receiver, | |
575 _predicted_receiver, _hit_prob, | |
576 &exact_receiver); | |
577 | |
578 SafePointNode* slow_map = NULL; | |
579 JVMState* slow_jvms; | |
580 { PreserveJVMState pjvms(&kit); | |
581 kit.set_control(slow_ctl); | |
582 if (!kit.stopped()) { | |
583 slow_jvms = _if_missed->generate(kit.sync_jvms()); | |
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584 if (kit.failing()) |
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585 return NULL; // might happen because of NodeCountInliningCutoff |
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586 assert(slow_jvms != NULL, "must be"); |
0 | 587 kit.add_exception_states_from(slow_jvms); |
588 kit.set_map(slow_jvms->map()); | |
589 if (!kit.stopped()) | |
590 slow_map = kit.stop(); | |
591 } | |
592 } | |
593 | |
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594 if (kit.stopped()) { |
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595 // Instance exactly does not matches the desired type. |
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596 kit.set_jvms(slow_jvms); |
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597 return kit.transfer_exceptions_into_jvms(); |
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598 } |
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599 |
0 | 600 // fall through if the instance exactly matches the desired type |
601 kit.replace_in_map(receiver, exact_receiver); | |
602 | |
603 // Make the hot call: | |
604 JVMState* new_jvms = _if_hit->generate(kit.sync_jvms()); | |
605 if (new_jvms == NULL) { | |
606 // Inline failed, so make a direct call. | |
607 assert(_if_hit->is_inline(), "must have been a failed inline"); | |
608 CallGenerator* cg = CallGenerator::for_direct_call(_if_hit->method()); | |
609 new_jvms = cg->generate(kit.sync_jvms()); | |
610 } | |
611 kit.add_exception_states_from(new_jvms); | |
612 kit.set_jvms(new_jvms); | |
613 | |
614 // Need to merge slow and fast? | |
615 if (slow_map == NULL) { | |
616 // The fast path is the only path remaining. | |
617 return kit.transfer_exceptions_into_jvms(); | |
618 } | |
619 | |
620 if (kit.stopped()) { | |
621 // Inlined method threw an exception, so it's just the slow path after all. | |
622 kit.set_jvms(slow_jvms); | |
623 return kit.transfer_exceptions_into_jvms(); | |
624 } | |
625 | |
626 // Finish the diamond. | |
627 kit.C->set_has_split_ifs(true); // Has chance for split-if optimization | |
628 RegionNode* region = new (kit.C, 3) RegionNode(3); | |
629 region->init_req(1, kit.control()); | |
630 region->init_req(2, slow_map->control()); | |
631 kit.set_control(gvn.transform(region)); | |
632 Node* iophi = PhiNode::make(region, kit.i_o(), Type::ABIO); | |
633 iophi->set_req(2, slow_map->i_o()); | |
634 kit.set_i_o(gvn.transform(iophi)); | |
635 kit.merge_memory(slow_map->merged_memory(), region, 2); | |
636 uint tos = kit.jvms()->stkoff() + kit.sp(); | |
637 uint limit = slow_map->req(); | |
638 for (uint i = TypeFunc::Parms; i < limit; i++) { | |
639 // Skip unused stack slots; fast forward to monoff(); | |
640 if (i == tos) { | |
641 i = kit.jvms()->monoff(); | |
642 if( i >= limit ) break; | |
643 } | |
644 Node* m = kit.map()->in(i); | |
645 Node* n = slow_map->in(i); | |
646 if (m != n) { | |
647 const Type* t = gvn.type(m)->meet(gvn.type(n)); | |
648 Node* phi = PhiNode::make(region, m, t); | |
649 phi->set_req(2, n); | |
650 kit.map()->set_req(i, gvn.transform(phi)); | |
651 } | |
652 } | |
653 return kit.transfer_exceptions_into_jvms(); | |
654 } | |
655 | |
656 | |
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657 CallGenerator* CallGenerator::for_method_handle_call(JVMState* jvms, ciMethod* caller, ciMethod* callee) { |
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658 assert(callee->is_method_handle_intrinsic() || |
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659 callee->is_compiled_lambda_form(), "for_method_handle_call mismatch"); |
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660 CallGenerator* cg = CallGenerator::for_method_handle_inline(jvms, caller, callee); |
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661 if (cg != NULL) |
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662 return cg; |
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663 return CallGenerator::for_direct_call(callee); |
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664 } |
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665 |
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666 CallGenerator* CallGenerator::for_method_handle_inline(JVMState* jvms, ciMethod* caller, ciMethod* callee) { |
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667 GraphKit kit(jvms); |
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668 PhaseGVN& gvn = kit.gvn(); |
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669 Compile* C = kit.C; |
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670 vmIntrinsics::ID iid = callee->intrinsic_id(); |
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671 switch (iid) { |
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672 case vmIntrinsics::_invokeBasic: |
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673 { |
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674 // get MethodHandle receiver |
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675 Node* receiver = kit.argument(0); |
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676 if (receiver->Opcode() == Op_ConP) { |
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677 const TypeOopPtr* oop_ptr = receiver->bottom_type()->is_oopptr(); |
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678 ciMethod* target = oop_ptr->const_oop()->as_method_handle()->get_vmtarget(); |
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679 guarantee(!target->is_method_handle_intrinsic(), "should not happen"); // XXX remove |
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680 const int vtable_index = methodOopDesc::invalid_vtable_index; |
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681 CallGenerator* cg = C->call_generator(target, vtable_index, false, jvms, true, PROB_ALWAYS); |
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682 if (cg != NULL && cg->is_inline()) |
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683 return cg; |
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684 } else { |
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685 if (PrintInlining) CompileTask::print_inlining(callee, jvms->depth() - 1, jvms->bci(), "receiver not constant"); |
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686 } |
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687 } |
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688 break; |
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689 |
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690 case vmIntrinsics::_linkToVirtual: |
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691 case vmIntrinsics::_linkToStatic: |
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692 case vmIntrinsics::_linkToSpecial: |
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693 case vmIntrinsics::_linkToInterface: |
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694 { |
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695 // pop MemberName argument |
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696 Node* member_name = kit.argument(callee->arg_size() - 1); |
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697 if (member_name->Opcode() == Op_ConP) { |
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698 const TypeOopPtr* oop_ptr = member_name->bottom_type()->is_oopptr(); |
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699 ciMethod* target = oop_ptr->const_oop()->as_member_name()->get_vmtarget(); |
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700 |
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701 // In lamda forms we erase signature types to avoid resolving issues |
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702 // involving class loaders. When we optimize a method handle invoke |
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703 // to a direct call we must cast the receiver and arguments to its |
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704 // actual types. |
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705 ciSignature* signature = target->signature(); |
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706 const int receiver_skip = target->is_static() ? 0 : 1; |
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707 // Cast receiver to its type. |
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708 if (!target->is_static()) { |
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709 Node* arg = kit.argument(0); |
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710 const TypeOopPtr* arg_type = arg->bottom_type()->isa_oopptr(); |
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711 const Type* sig_type = TypeOopPtr::make_from_klass(signature->accessing_klass()); |
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712 if (arg_type != NULL && !arg_type->higher_equal(sig_type)) { |
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713 Node* cast_obj = gvn.transform(new (C, 2) CheckCastPPNode(kit.control(), arg, sig_type)); |
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714 kit.set_argument(0, cast_obj); |
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715 } |
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716 } |
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717 // Cast reference arguments to its type. |
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718 for (int i = 0; i < signature->count(); i++) { |
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719 ciType* t = signature->type_at(i); |
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720 if (t->is_klass()) { |
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721 Node* arg = kit.argument(receiver_skip + i); |
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722 const TypeOopPtr* arg_type = arg->bottom_type()->isa_oopptr(); |
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723 const Type* sig_type = TypeOopPtr::make_from_klass(t->as_klass()); |
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724 if (arg_type != NULL && !arg_type->higher_equal(sig_type)) { |
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725 Node* cast_obj = gvn.transform(new (C, 2) CheckCastPPNode(kit.control(), arg, sig_type)); |
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726 kit.set_argument(receiver_skip + i, cast_obj); |
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727 } |
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728 } |
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729 } |
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730 const int vtable_index = methodOopDesc::invalid_vtable_index; |
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731 const bool call_is_virtual = target->is_abstract(); // FIXME workaround |
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732 CallGenerator* cg = C->call_generator(target, vtable_index, call_is_virtual, jvms, true, PROB_ALWAYS); |
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733 if (cg != NULL && cg->is_inline()) |
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734 return cg; |
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735 } |
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736 } |
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737 break; |
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738 |
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739 default: |
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740 fatal(err_msg_res("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid))); |
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741 break; |
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742 } |
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743 return NULL; |
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744 } |
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745 |
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746 |
0 | 747 //-------------------------UncommonTrapCallGenerator----------------------------- |
748 // Internal class which handles all out-of-line calls checking receiver type. | |
749 class UncommonTrapCallGenerator : public CallGenerator { | |
750 Deoptimization::DeoptReason _reason; | |
751 Deoptimization::DeoptAction _action; | |
752 | |
753 public: | |
754 UncommonTrapCallGenerator(ciMethod* m, | |
755 Deoptimization::DeoptReason reason, | |
756 Deoptimization::DeoptAction action) | |
757 : CallGenerator(m) | |
758 { | |
759 _reason = reason; | |
760 _action = action; | |
761 } | |
762 | |
763 virtual bool is_virtual() const { ShouldNotReachHere(); return false; } | |
764 virtual bool is_trap() const { return true; } | |
765 | |
766 virtual JVMState* generate(JVMState* jvms); | |
767 }; | |
768 | |
769 | |
770 CallGenerator* | |
771 CallGenerator::for_uncommon_trap(ciMethod* m, | |
772 Deoptimization::DeoptReason reason, | |
773 Deoptimization::DeoptAction action) { | |
774 return new UncommonTrapCallGenerator(m, reason, action); | |
775 } | |
776 | |
777 | |
778 JVMState* UncommonTrapCallGenerator::generate(JVMState* jvms) { | |
779 GraphKit kit(jvms); | |
780 // Take the trap with arguments pushed on the stack. (Cf. null_check_receiver). | |
781 int nargs = method()->arg_size(); | |
782 kit.inc_sp(nargs); | |
783 assert(nargs <= kit.sp() && kit.sp() <= jvms->stk_size(), "sane sp w/ args pushed"); | |
784 if (_reason == Deoptimization::Reason_class_check && | |
785 _action == Deoptimization::Action_maybe_recompile) { | |
786 // Temp fix for 6529811 | |
787 // Don't allow uncommon_trap to override our decision to recompile in the event | |
788 // of a class cast failure for a monomorphic call as it will never let us convert | |
789 // the call to either bi-morphic or megamorphic and can lead to unc-trap loops | |
790 bool keep_exact_action = true; | |
791 kit.uncommon_trap(_reason, _action, NULL, "monomorphic vcall checkcast", false, keep_exact_action); | |
792 } else { | |
793 kit.uncommon_trap(_reason, _action); | |
794 } | |
795 return kit.transfer_exceptions_into_jvms(); | |
796 } | |
797 | |
798 // (Note: Moved hook_up_call to GraphKit::set_edges_for_java_call.) | |
799 | |
800 // (Node: Merged hook_up_exits into ParseGenerator::generate.) | |
801 | |
802 #define NODES_OVERHEAD_PER_METHOD (30.0) | |
803 #define NODES_PER_BYTECODE (9.5) | |
804 | |
805 void WarmCallInfo::init(JVMState* call_site, ciMethod* call_method, ciCallProfile& profile, float prof_factor) { | |
806 int call_count = profile.count(); | |
807 int code_size = call_method->code_size(); | |
808 | |
809 // Expected execution count is based on the historical count: | |
810 _count = call_count < 0 ? 1 : call_site->method()->scale_count(call_count, prof_factor); | |
811 | |
812 // Expected profit from inlining, in units of simple call-overheads. | |
813 _profit = 1.0; | |
814 | |
815 // Expected work performed by the call in units of call-overheads. | |
816 // %%% need an empirical curve fit for "work" (time in call) | |
817 float bytecodes_per_call = 3; | |
818 _work = 1.0 + code_size / bytecodes_per_call; | |
819 | |
820 // Expected size of compilation graph: | |
821 // -XX:+PrintParseStatistics once reported: | |
822 // Methods seen: 9184 Methods parsed: 9184 Nodes created: 1582391 | |
823 // Histogram of 144298 parsed bytecodes: | |
824 // %%% Need an better predictor for graph size. | |
825 _size = NODES_OVERHEAD_PER_METHOD + (NODES_PER_BYTECODE * code_size); | |
826 } | |
827 | |
828 // is_cold: Return true if the node should never be inlined. | |
829 // This is true if any of the key metrics are extreme. | |
830 bool WarmCallInfo::is_cold() const { | |
831 if (count() < WarmCallMinCount) return true; | |
832 if (profit() < WarmCallMinProfit) return true; | |
833 if (work() > WarmCallMaxWork) return true; | |
834 if (size() > WarmCallMaxSize) return true; | |
835 return false; | |
836 } | |
837 | |
838 // is_hot: Return true if the node should be inlined immediately. | |
839 // This is true if any of the key metrics are extreme. | |
840 bool WarmCallInfo::is_hot() const { | |
841 assert(!is_cold(), "eliminate is_cold cases before testing is_hot"); | |
842 if (count() >= HotCallCountThreshold) return true; | |
843 if (profit() >= HotCallProfitThreshold) return true; | |
844 if (work() <= HotCallTrivialWork) return true; | |
845 if (size() <= HotCallTrivialSize) return true; | |
846 return false; | |
847 } | |
848 | |
849 // compute_heat: | |
850 float WarmCallInfo::compute_heat() const { | |
851 assert(!is_cold(), "compute heat only on warm nodes"); | |
852 assert(!is_hot(), "compute heat only on warm nodes"); | |
853 int min_size = MAX2(0, (int)HotCallTrivialSize); | |
854 int max_size = MIN2(500, (int)WarmCallMaxSize); | |
855 float method_size = (size() - min_size) / MAX2(1, max_size - min_size); | |
856 float size_factor; | |
857 if (method_size < 0.05) size_factor = 4; // 2 sigmas better than avg. | |
858 else if (method_size < 0.15) size_factor = 2; // 1 sigma better than avg. | |
859 else if (method_size < 0.5) size_factor = 1; // better than avg. | |
860 else size_factor = 0.5; // worse than avg. | |
861 return (count() * profit() * size_factor); | |
862 } | |
863 | |
864 bool WarmCallInfo::warmer_than(WarmCallInfo* that) { | |
865 assert(this != that, "compare only different WCIs"); | |
866 assert(this->heat() != 0 && that->heat() != 0, "call compute_heat 1st"); | |
867 if (this->heat() > that->heat()) return true; | |
868 if (this->heat() < that->heat()) return false; | |
869 assert(this->heat() == that->heat(), "no NaN heat allowed"); | |
870 // Equal heat. Break the tie some other way. | |
871 if (!this->call() || !that->call()) return (address)this > (address)that; | |
872 return this->call()->_idx > that->call()->_idx; | |
873 } | |
874 | |
875 //#define UNINIT_NEXT ((WarmCallInfo*)badAddress) | |
876 #define UNINIT_NEXT ((WarmCallInfo*)NULL) | |
877 | |
878 WarmCallInfo* WarmCallInfo::insert_into(WarmCallInfo* head) { | |
879 assert(next() == UNINIT_NEXT, "not yet on any list"); | |
880 WarmCallInfo* prev_p = NULL; | |
881 WarmCallInfo* next_p = head; | |
882 while (next_p != NULL && next_p->warmer_than(this)) { | |
883 prev_p = next_p; | |
884 next_p = prev_p->next(); | |
885 } | |
886 // Install this between prev_p and next_p. | |
887 this->set_next(next_p); | |
888 if (prev_p == NULL) | |
889 head = this; | |
890 else | |
891 prev_p->set_next(this); | |
892 return head; | |
893 } | |
894 | |
895 WarmCallInfo* WarmCallInfo::remove_from(WarmCallInfo* head) { | |
896 WarmCallInfo* prev_p = NULL; | |
897 WarmCallInfo* next_p = head; | |
898 while (next_p != this) { | |
899 assert(next_p != NULL, "this must be in the list somewhere"); | |
900 prev_p = next_p; | |
901 next_p = prev_p->next(); | |
902 } | |
903 next_p = this->next(); | |
904 debug_only(this->set_next(UNINIT_NEXT)); | |
905 // Remove this from between prev_p and next_p. | |
906 if (prev_p == NULL) | |
907 head = next_p; | |
908 else | |
909 prev_p->set_next(next_p); | |
910 return head; | |
911 } | |
912 | |
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913 WarmCallInfo WarmCallInfo::_always_hot(WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE(), |
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914 WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE()); |
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915 WarmCallInfo WarmCallInfo::_always_cold(WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE(), |
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916 WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE()); |
0 | 917 |
918 WarmCallInfo* WarmCallInfo::always_hot() { | |
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919 assert(_always_hot.is_hot(), "must always be hot"); |
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920 return &_always_hot; |
0 | 921 } |
922 | |
923 WarmCallInfo* WarmCallInfo::always_cold() { | |
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924 assert(_always_cold.is_cold(), "must always be cold"); |
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925 return &_always_cold; |
0 | 926 } |
927 | |
928 | |
929 #ifndef PRODUCT | |
930 | |
931 void WarmCallInfo::print() const { | |
932 tty->print("%s : C=%6.1f P=%6.1f W=%6.1f S=%6.1f H=%6.1f -> %p", | |
933 is_cold() ? "cold" : is_hot() ? "hot " : "warm", | |
934 count(), profit(), work(), size(), compute_heat(), next()); | |
935 tty->cr(); | |
936 if (call() != NULL) call()->dump(); | |
937 } | |
938 | |
939 void print_wci(WarmCallInfo* ci) { | |
940 ci->print(); | |
941 } | |
942 | |
943 void WarmCallInfo::print_all() const { | |
944 for (const WarmCallInfo* p = this; p != NULL; p = p->next()) | |
945 p->print(); | |
946 } | |
947 | |
948 int WarmCallInfo::count_all() const { | |
949 int cnt = 0; | |
950 for (const WarmCallInfo* p = this; p != NULL; p = p->next()) | |
951 cnt++; | |
952 return cnt; | |
953 } | |
954 | |
955 #endif //PRODUCT |