Mercurial > hg > truffle
annotate src/share/vm/opto/callGenerator.cpp @ 3852:fdb992d83a87
7071653: JSR 292: call site change notification should be pushed not pulled
Reviewed-by: kvn, never, bdelsart
| author | twisti |
|---|---|
| date | Tue, 16 Aug 2011 04:14:05 -0700 |
| parents | f918d6096e23 |
| children | b27c72d69fd1 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 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/bcEscapeAnalyzer.hpp" | |
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27 #include "ci/ciCallSite.hpp" |
| 1972 | 28 #include "ci/ciCPCache.hpp" |
| 29 #include "ci/ciMethodHandle.hpp" | |
| 30 #include "classfile/javaClasses.hpp" | |
| 31 #include "compiler/compileLog.hpp" | |
| 32 #include "opto/addnode.hpp" | |
| 33 #include "opto/callGenerator.hpp" | |
| 34 #include "opto/callnode.hpp" | |
| 35 #include "opto/cfgnode.hpp" | |
| 36 #include "opto/connode.hpp" | |
| 37 #include "opto/parse.hpp" | |
| 38 #include "opto/rootnode.hpp" | |
| 39 #include "opto/runtime.hpp" | |
| 40 #include "opto/subnode.hpp" | |
| 0 | 41 |
| 42 CallGenerator::CallGenerator(ciMethod* method) { | |
| 43 _method = method; | |
| 44 } | |
| 45 | |
| 46 // Utility function. | |
| 47 const TypeFunc* CallGenerator::tf() const { | |
| 48 return TypeFunc::make(method()); | |
| 49 } | |
| 50 | |
| 51 //-----------------------------ParseGenerator--------------------------------- | |
| 52 // Internal class which handles all direct bytecode traversal. | |
| 53 class ParseGenerator : public InlineCallGenerator { | |
| 54 private: | |
| 55 bool _is_osr; | |
| 56 float _expected_uses; | |
| 57 | |
| 58 public: | |
| 59 ParseGenerator(ciMethod* method, float expected_uses, bool is_osr = false) | |
| 60 : InlineCallGenerator(method) | |
| 61 { | |
| 62 _is_osr = is_osr; | |
| 63 _expected_uses = expected_uses; | |
| 64 assert(can_parse(method, is_osr), "parse must be possible"); | |
| 65 } | |
| 66 | |
| 67 // Can we build either an OSR or a regular parser for this method? | |
| 68 static bool can_parse(ciMethod* method, int is_osr = false); | |
| 69 | |
| 70 virtual bool is_parse() const { return true; } | |
| 71 virtual JVMState* generate(JVMState* jvms); | |
| 72 int is_osr() { return _is_osr; } | |
| 73 | |
| 74 }; | |
| 75 | |
| 76 JVMState* ParseGenerator::generate(JVMState* jvms) { | |
| 77 Compile* C = Compile::current(); | |
| 78 | |
| 79 if (is_osr()) { | |
| 80 // The JVMS for a OSR has a single argument (see its TypeFunc). | |
| 81 assert(jvms->depth() == 1, "no inline OSR"); | |
| 82 } | |
| 83 | |
| 84 if (C->failing()) { | |
| 85 return NULL; // bailing out of the compile; do not try to parse | |
| 86 } | |
| 87 | |
| 88 Parse parser(jvms, method(), _expected_uses); | |
| 89 // Grab signature for matching/allocation | |
| 90 #ifdef ASSERT | |
| 91 if (parser.tf() != (parser.depth() == 1 ? C->tf() : tf())) { | |
| 92 MutexLockerEx ml(Compile_lock, Mutex::_no_safepoint_check_flag); | |
| 93 assert(C->env()->system_dictionary_modification_counter_changed(), | |
| 94 "Must invalidate if TypeFuncs differ"); | |
| 95 } | |
| 96 #endif | |
| 97 | |
| 98 GraphKit& exits = parser.exits(); | |
| 99 | |
| 100 if (C->failing()) { | |
| 101 while (exits.pop_exception_state() != NULL) ; | |
| 102 return NULL; | |
| 103 } | |
| 104 | |
| 105 assert(exits.jvms()->same_calls_as(jvms), "sanity"); | |
| 106 | |
| 107 // Simply return the exit state of the parser, | |
| 108 // augmented by any exceptional states. | |
| 109 return exits.transfer_exceptions_into_jvms(); | |
| 110 } | |
| 111 | |
| 112 //---------------------------DirectCallGenerator------------------------------ | |
| 113 // Internal class which handles all out-of-line calls w/o receiver type checks. | |
| 114 class DirectCallGenerator : public CallGenerator { | |
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115 private: |
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116 CallStaticJavaNode* _call_node; |
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117 // Force separate memory and I/O projections for the exceptional |
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118 // paths to facilitate late inlinig. |
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119 bool _separate_io_proj; |
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120 |
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121 public: |
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122 DirectCallGenerator(ciMethod* method, bool separate_io_proj) |
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123 : CallGenerator(method), |
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124 _separate_io_proj(separate_io_proj) |
| 0 | 125 { |
| 126 } | |
| 127 virtual JVMState* generate(JVMState* jvms); | |
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128 |
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129 CallStaticJavaNode* call_node() const { return _call_node; } |
| 0 | 130 }; |
| 131 | |
| 132 JVMState* DirectCallGenerator::generate(JVMState* jvms) { | |
| 133 GraphKit kit(jvms); | |
| 134 bool is_static = method()->is_static(); | |
| 135 address target = is_static ? SharedRuntime::get_resolve_static_call_stub() | |
| 136 : SharedRuntime::get_resolve_opt_virtual_call_stub(); | |
| 137 | |
| 138 if (kit.C->log() != NULL) { | |
| 139 kit.C->log()->elem("direct_call bci='%d'", jvms->bci()); | |
| 140 } | |
| 141 | |
| 142 CallStaticJavaNode *call = new (kit.C, tf()->domain()->cnt()) CallStaticJavaNode(tf(), target, method(), kit.bci()); | |
| 143 if (!is_static) { | |
| 144 // Make an explicit receiver null_check as part of this call. | |
| 145 // Since we share a map with the caller, his JVMS gets adjusted. | |
| 146 kit.null_check_receiver(method()); | |
| 147 if (kit.stopped()) { | |
| 148 // And dump it back to the caller, decorated with any exceptions: | |
| 149 return kit.transfer_exceptions_into_jvms(); | |
| 150 } | |
| 151 // Mark the call node as virtual, sort of: | |
| 152 call->set_optimized_virtual(true); | |
| 1265 | 153 if (method()->is_method_handle_invoke()) { |
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154 call->set_method_handle_invoke(true); |
| 1265 | 155 kit.C->set_has_method_handle_invokes(true); |
| 156 } | |
| 0 | 157 } |
| 158 kit.set_arguments_for_java_call(call); | |
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159 kit.set_edges_for_java_call(call, false, _separate_io_proj); |
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160 Node* ret = kit.set_results_for_java_call(call, _separate_io_proj); |
| 0 | 161 kit.push_node(method()->return_type()->basic_type(), ret); |
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162 _call_node = call; // Save the call node in case we need it later |
| 0 | 163 return kit.transfer_exceptions_into_jvms(); |
| 164 } | |
| 165 | |
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166 //---------------------------DynamicCallGenerator----------------------------- |
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167 // Internal class which handles all out-of-line invokedynamic calls. |
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168 class DynamicCallGenerator : public CallGenerator { |
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169 public: |
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170 DynamicCallGenerator(ciMethod* method) |
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171 : CallGenerator(method) |
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172 { |
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173 } |
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174 virtual JVMState* generate(JVMState* jvms); |
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175 }; |
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176 |
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177 JVMState* DynamicCallGenerator::generate(JVMState* jvms) { |
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178 GraphKit kit(jvms); |
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179 |
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180 if (kit.C->log() != NULL) { |
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181 kit.C->log()->elem("dynamic_call bci='%d'", jvms->bci()); |
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182 } |
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183 |
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184 // Get the constant pool cache from the caller class. |
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185 ciMethod* caller_method = jvms->method(); |
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186 ciBytecodeStream str(caller_method); |
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187 str.force_bci(jvms->bci()); // Set the stream to the invokedynamic bci. |
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188 assert(str.cur_bc() == Bytecodes::_invokedynamic, "wrong place to issue a dynamic call!"); |
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189 ciCPCache* cpcache = str.get_cpcache(); |
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190 |
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191 // Get the offset of the CallSite from the constant pool cache |
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192 // pointer. |
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193 int index = str.get_method_index(); |
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194 size_t call_site_offset = cpcache->get_f1_offset(index); |
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195 |
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196 // Load the CallSite object from the constant pool cache. |
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197 const TypeOopPtr* cpcache_ptr = TypeOopPtr::make_from_constant(cpcache); |
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198 Node* cpcache_adr = kit.makecon(cpcache_ptr); |
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199 Node* call_site_adr = kit.basic_plus_adr(cpcache_adr, cpcache_adr, call_site_offset); |
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200 Node* call_site = kit.make_load(kit.control(), call_site_adr, TypeInstPtr::BOTTOM, T_OBJECT, Compile::AliasIdxRaw); |
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201 |
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202 // Load the target MethodHandle from the CallSite object. |
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203 Node* target_mh_adr = kit.basic_plus_adr(call_site, 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, TypeInstPtr::BOTTOM, 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 (kit.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); |
| 1265 | 213 kit.C->set_has_method_handle_invokes(true); |
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214 |
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215 // Pass the target MethodHandle as first argument and shift the |
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216 // other arguments. |
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217 call->init_req(0 + TypeFunc::Parms, target_mh); |
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218 uint nargs = call->method()->arg_size(); |
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219 for (uint i = 1; i < nargs; i++) { |
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220 Node* arg = kit.argument(i - 1); |
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221 call->init_req(i + TypeFunc::Parms, arg); |
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222 } |
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223 |
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224 kit.set_edges_for_java_call(call); |
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225 Node* ret = kit.set_results_for_java_call(call); |
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226 kit.push_node(method()->return_type()->basic_type(), ret); |
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227 return kit.transfer_exceptions_into_jvms(); |
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228 } |
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229 |
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230 //--------------------------VirtualCallGenerator------------------------------ |
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231 // Internal class which handles all out-of-line calls checking receiver type. |
| 0 | 232 class VirtualCallGenerator : public CallGenerator { |
| 233 private: | |
| 234 int _vtable_index; | |
| 235 public: | |
| 236 VirtualCallGenerator(ciMethod* method, int vtable_index) | |
| 237 : CallGenerator(method), _vtable_index(vtable_index) | |
| 238 { | |
| 239 assert(vtable_index == methodOopDesc::invalid_vtable_index || | |
| 240 vtable_index >= 0, "either invalid or usable"); | |
| 241 } | |
| 242 virtual bool is_virtual() const { return true; } | |
| 243 virtual JVMState* generate(JVMState* jvms); | |
| 244 }; | |
| 245 | |
| 246 JVMState* VirtualCallGenerator::generate(JVMState* jvms) { | |
| 247 GraphKit kit(jvms); | |
| 248 Node* receiver = kit.argument(0); | |
| 249 | |
| 250 if (kit.C->log() != NULL) { | |
| 251 kit.C->log()->elem("virtual_call bci='%d'", jvms->bci()); | |
| 252 } | |
| 253 | |
| 254 // If the receiver is a constant null, do not torture the system | |
| 255 // by attempting to call through it. The compile will proceed | |
| 256 // correctly, but may bail out in final_graph_reshaping, because | |
| 257 // the call instruction will have a seemingly deficient out-count. | |
| 258 // (The bailout says something misleading about an "infinite loop".) | |
| 259 if (kit.gvn().type(receiver)->higher_equal(TypePtr::NULL_PTR)) { | |
| 260 kit.inc_sp(method()->arg_size()); // restore arguments | |
| 261 kit.uncommon_trap(Deoptimization::Reason_null_check, | |
| 262 Deoptimization::Action_none, | |
| 263 NULL, "null receiver"); | |
| 264 return kit.transfer_exceptions_into_jvms(); | |
| 265 } | |
| 266 | |
| 267 // Ideally we would unconditionally do a null check here and let it | |
| 268 // be converted to an implicit check based on profile information. | |
| 269 // However currently the conversion to implicit null checks in | |
| 270 // Block::implicit_null_check() only looks for loads and stores, not calls. | |
| 271 ciMethod *caller = kit.method(); | |
| 272 ciMethodData *caller_md = (caller == NULL) ? NULL : caller->method_data(); | |
| 273 if (!UseInlineCaches || !ImplicitNullChecks || | |
| 274 ((ImplicitNullCheckThreshold > 0) && caller_md && | |
| 275 (caller_md->trap_count(Deoptimization::Reason_null_check) | |
| 276 >= (uint)ImplicitNullCheckThreshold))) { | |
| 277 // Make an explicit receiver null_check as part of this call. | |
| 278 // Since we share a map with the caller, his JVMS gets adjusted. | |
| 279 receiver = kit.null_check_receiver(method()); | |
| 280 if (kit.stopped()) { | |
| 281 // And dump it back to the caller, decorated with any exceptions: | |
| 282 return kit.transfer_exceptions_into_jvms(); | |
| 283 } | |
| 284 } | |
| 285 | |
| 286 assert(!method()->is_static(), "virtual call must not be to static"); | |
| 287 assert(!method()->is_final(), "virtual call should not be to final"); | |
| 288 assert(!method()->is_private(), "virtual call should not be to private"); | |
| 289 assert(_vtable_index == methodOopDesc::invalid_vtable_index || !UseInlineCaches, | |
| 290 "no vtable calls if +UseInlineCaches "); | |
| 291 address target = SharedRuntime::get_resolve_virtual_call_stub(); | |
| 292 // Normal inline cache used for call | |
| 293 CallDynamicJavaNode *call = new (kit.C, tf()->domain()->cnt()) CallDynamicJavaNode(tf(), target, method(), _vtable_index, kit.bci()); | |
| 294 kit.set_arguments_for_java_call(call); | |
| 295 kit.set_edges_for_java_call(call); | |
| 296 Node* ret = kit.set_results_for_java_call(call); | |
| 297 kit.push_node(method()->return_type()->basic_type(), ret); | |
| 298 | |
| 299 // Represent the effect of an implicit receiver null_check | |
| 300 // as part of this call. Since we share a map with the caller, | |
| 301 // his JVMS gets adjusted. | |
| 302 kit.cast_not_null(receiver); | |
| 303 return kit.transfer_exceptions_into_jvms(); | |
| 304 } | |
| 305 | |
| 306 bool ParseGenerator::can_parse(ciMethod* m, int entry_bci) { | |
| 307 // Certain methods cannot be parsed at all: | |
| 308 if (!m->can_be_compiled()) return false; | |
| 309 if (!m->has_balanced_monitors()) return false; | |
| 310 if (m->get_flow_analysis()->failing()) return false; | |
| 311 | |
| 312 // (Methods may bail out for other reasons, after the parser is run. | |
| 313 // We try to avoid this, but if forced, we must return (Node*)NULL. | |
| 314 // The user of the CallGenerator must check for this condition.) | |
| 315 return true; | |
| 316 } | |
| 317 | |
| 318 CallGenerator* CallGenerator::for_inline(ciMethod* m, float expected_uses) { | |
| 319 if (!ParseGenerator::can_parse(m)) return NULL; | |
| 320 return new ParseGenerator(m, expected_uses); | |
| 321 } | |
| 322 | |
| 323 // As a special case, the JVMS passed to this CallGenerator is | |
| 324 // for the method execution already in progress, not just the JVMS | |
| 325 // of the caller. Thus, this CallGenerator cannot be mixed with others! | |
| 326 CallGenerator* CallGenerator::for_osr(ciMethod* m, int osr_bci) { | |
| 327 if (!ParseGenerator::can_parse(m, true)) return NULL; | |
| 328 float past_uses = m->interpreter_invocation_count(); | |
| 329 float expected_uses = past_uses; | |
| 330 return new ParseGenerator(m, expected_uses, true); | |
| 331 } | |
| 332 | |
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333 CallGenerator* CallGenerator::for_direct_call(ciMethod* m, bool separate_io_proj) { |
| 0 | 334 assert(!m->is_abstract(), "for_direct_call mismatch"); |
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335 return new DirectCallGenerator(m, separate_io_proj); |
| 0 | 336 } |
| 337 | |
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338 CallGenerator* CallGenerator::for_dynamic_call(ciMethod* m) { |
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339 assert(m->is_method_handle_invoke(), "for_dynamic_call mismatch"); |
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340 return new DynamicCallGenerator(m); |
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341 } |
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342 |
| 0 | 343 CallGenerator* CallGenerator::for_virtual_call(ciMethod* m, int vtable_index) { |
| 344 assert(!m->is_static(), "for_virtual_call mismatch"); | |
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345 assert(!m->is_method_handle_invoke(), "should be a direct call"); |
| 0 | 346 return new VirtualCallGenerator(m, vtable_index); |
| 347 } | |
| 348 | |
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349 // Allow inlining decisions to be delayed |
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350 class LateInlineCallGenerator : public DirectCallGenerator { |
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351 CallGenerator* _inline_cg; |
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352 |
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353 public: |
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354 LateInlineCallGenerator(ciMethod* method, CallGenerator* inline_cg) : |
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355 DirectCallGenerator(method, true), _inline_cg(inline_cg) {} |
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356 |
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357 virtual bool is_late_inline() const { return true; } |
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358 |
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359 // Convert the CallStaticJava into an inline |
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360 virtual void do_late_inline(); |
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361 |
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362 JVMState* generate(JVMState* jvms) { |
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363 // Record that this call site should be revisited once the main |
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364 // parse is finished. |
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365 Compile::current()->add_late_inline(this); |
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366 |
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367 // Emit the CallStaticJava and request separate projections so |
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368 // that the late inlining logic can distinguish between fall |
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369 // through and exceptional uses of the memory and io projections |
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370 // as is done for allocations and macro expansion. |
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371 return DirectCallGenerator::generate(jvms); |
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372 } |
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373 |
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374 }; |
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375 |
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376 |
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377 void LateInlineCallGenerator::do_late_inline() { |
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378 // Can't inline it |
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379 if (call_node() == NULL || call_node()->outcnt() == 0 || |
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380 call_node()->in(0) == NULL || call_node()->in(0)->is_top()) |
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381 return; |
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382 |
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383 CallStaticJavaNode* call = call_node(); |
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384 |
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385 // Make a clone of the JVMState that appropriate to use for driving a parse |
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386 Compile* C = Compile::current(); |
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387 JVMState* jvms = call->jvms()->clone_shallow(C); |
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388 uint size = call->req(); |
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389 SafePointNode* map = new (C, size) SafePointNode(size, jvms); |
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390 for (uint i1 = 0; i1 < size; i1++) { |
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391 map->init_req(i1, call->in(i1)); |
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392 } |
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393 |
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394 // Make sure the state is a MergeMem for parsing. |
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395 if (!map->in(TypeFunc::Memory)->is_MergeMem()) { |
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396 map->set_req(TypeFunc::Memory, MergeMemNode::make(C, map->in(TypeFunc::Memory))); |
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397 } |
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398 |
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399 // Make enough space for the expression stack and transfer the incoming arguments |
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400 int nargs = method()->arg_size(); |
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401 jvms->set_map(map); |
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402 map->ensure_stack(jvms, jvms->method()->max_stack()); |
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403 if (nargs > 0) { |
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404 for (int i1 = 0; i1 < nargs; i1++) { |
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405 map->set_req(i1 + jvms->argoff(), call->in(TypeFunc::Parms + i1)); |
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406 } |
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407 } |
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408 |
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409 CompileLog* log = C->log(); |
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410 if (log != NULL) { |
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411 log->head("late_inline method='%d'", log->identify(method())); |
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412 JVMState* p = jvms; |
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413 while (p != NULL) { |
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414 log->elem("jvms bci='%d' method='%d'", p->bci(), log->identify(p->method())); |
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415 p = p->caller(); |
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416 } |
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417 log->tail("late_inline"); |
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418 } |
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419 |
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420 // Setup default node notes to be picked up by the inlining |
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421 Node_Notes* old_nn = C->default_node_notes(); |
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422 if (old_nn != NULL) { |
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423 Node_Notes* entry_nn = old_nn->clone(C); |
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424 entry_nn->set_jvms(jvms); |
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425 C->set_default_node_notes(entry_nn); |
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426 } |
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427 |
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428 // Now perform the inling using the synthesized JVMState |
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429 JVMState* new_jvms = _inline_cg->generate(jvms); |
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430 if (new_jvms == NULL) return; // no change |
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431 if (C->failing()) return; |
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432 |
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433 // Capture any exceptional control flow |
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434 GraphKit kit(new_jvms); |
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435 |
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436 // Find the result object |
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437 Node* result = C->top(); |
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438 int result_size = method()->return_type()->size(); |
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439 if (result_size != 0 && !kit.stopped()) { |
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440 result = (result_size == 1) ? kit.pop() : kit.pop_pair(); |
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441 } |
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442 |
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443 kit.replace_call(call, result); |
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444 } |
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445 |
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446 |
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447 CallGenerator* CallGenerator::for_late_inline(ciMethod* method, CallGenerator* inline_cg) { |
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448 return new LateInlineCallGenerator(method, inline_cg); |
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449 } |
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| 0 | 451 |
| 452 //---------------------------WarmCallGenerator-------------------------------- | |
| 453 // Internal class which handles initial deferral of inlining decisions. | |
| 454 class WarmCallGenerator : public CallGenerator { | |
| 455 WarmCallInfo* _call_info; | |
| 456 CallGenerator* _if_cold; | |
| 457 CallGenerator* _if_hot; | |
| 458 bool _is_virtual; // caches virtuality of if_cold | |
| 459 bool _is_inline; // caches inline-ness of if_hot | |
| 460 | |
| 461 public: | |
| 462 WarmCallGenerator(WarmCallInfo* ci, | |
| 463 CallGenerator* if_cold, | |
| 464 CallGenerator* if_hot) | |
| 465 : CallGenerator(if_cold->method()) | |
| 466 { | |
| 467 assert(method() == if_hot->method(), "consistent choices"); | |
| 468 _call_info = ci; | |
| 469 _if_cold = if_cold; | |
| 470 _if_hot = if_hot; | |
| 471 _is_virtual = if_cold->is_virtual(); | |
| 472 _is_inline = if_hot->is_inline(); | |
| 473 } | |
| 474 | |
| 475 virtual bool is_inline() const { return _is_inline; } | |
| 476 virtual bool is_virtual() const { return _is_virtual; } | |
| 477 virtual bool is_deferred() const { return true; } | |
| 478 | |
| 479 virtual JVMState* generate(JVMState* jvms); | |
| 480 }; | |
| 481 | |
| 482 | |
| 483 CallGenerator* CallGenerator::for_warm_call(WarmCallInfo* ci, | |
| 484 CallGenerator* if_cold, | |
| 485 CallGenerator* if_hot) { | |
| 486 return new WarmCallGenerator(ci, if_cold, if_hot); | |
| 487 } | |
| 488 | |
| 489 JVMState* WarmCallGenerator::generate(JVMState* jvms) { | |
| 490 Compile* C = Compile::current(); | |
| 491 if (C->log() != NULL) { | |
| 492 C->log()->elem("warm_call bci='%d'", jvms->bci()); | |
| 493 } | |
| 494 jvms = _if_cold->generate(jvms); | |
| 495 if (jvms != NULL) { | |
| 496 Node* m = jvms->map()->control(); | |
| 497 if (m->is_CatchProj()) m = m->in(0); else m = C->top(); | |
| 498 if (m->is_Catch()) m = m->in(0); else m = C->top(); | |
| 499 if (m->is_Proj()) m = m->in(0); else m = C->top(); | |
| 500 if (m->is_CallJava()) { | |
| 501 _call_info->set_call(m->as_Call()); | |
| 502 _call_info->set_hot_cg(_if_hot); | |
| 503 #ifndef PRODUCT | |
| 504 if (PrintOpto || PrintOptoInlining) { | |
| 505 tty->print_cr("Queueing for warm inlining at bci %d:", jvms->bci()); | |
| 506 tty->print("WCI: "); | |
| 507 _call_info->print(); | |
| 508 } | |
| 509 #endif | |
| 510 _call_info->set_heat(_call_info->compute_heat()); | |
| 511 C->set_warm_calls(_call_info->insert_into(C->warm_calls())); | |
| 512 } | |
| 513 } | |
| 514 return jvms; | |
| 515 } | |
| 516 | |
| 517 void WarmCallInfo::make_hot() { | |
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518 Unimplemented(); |
| 0 | 519 } |
| 520 | |
| 521 void WarmCallInfo::make_cold() { | |
| 522 // No action: Just dequeue. | |
| 523 } | |
| 524 | |
| 525 | |
| 526 //------------------------PredictedCallGenerator------------------------------ | |
| 527 // Internal class which handles all out-of-line calls checking receiver type. | |
| 528 class PredictedCallGenerator : public CallGenerator { | |
| 529 ciKlass* _predicted_receiver; | |
| 530 CallGenerator* _if_missed; | |
| 531 CallGenerator* _if_hit; | |
| 532 float _hit_prob; | |
| 533 | |
| 534 public: | |
| 535 PredictedCallGenerator(ciKlass* predicted_receiver, | |
| 536 CallGenerator* if_missed, | |
| 537 CallGenerator* if_hit, float hit_prob) | |
| 538 : CallGenerator(if_missed->method()) | |
| 539 { | |
| 540 // The call profile data may predict the hit_prob as extreme as 0 or 1. | |
| 541 // Remove the extremes values from the range. | |
| 542 if (hit_prob > PROB_MAX) hit_prob = PROB_MAX; | |
| 543 if (hit_prob < PROB_MIN) hit_prob = PROB_MIN; | |
| 544 | |
| 545 _predicted_receiver = predicted_receiver; | |
| 546 _if_missed = if_missed; | |
| 547 _if_hit = if_hit; | |
| 548 _hit_prob = hit_prob; | |
| 549 } | |
| 550 | |
| 551 virtual bool is_virtual() const { return true; } | |
| 552 virtual bool is_inline() const { return _if_hit->is_inline(); } | |
| 553 virtual bool is_deferred() const { return _if_hit->is_deferred(); } | |
| 554 | |
| 555 virtual JVMState* generate(JVMState* jvms); | |
| 556 }; | |
| 557 | |
| 558 | |
| 559 CallGenerator* CallGenerator::for_predicted_call(ciKlass* predicted_receiver, | |
| 560 CallGenerator* if_missed, | |
| 561 CallGenerator* if_hit, | |
| 562 float hit_prob) { | |
| 563 return new PredictedCallGenerator(predicted_receiver, if_missed, if_hit, hit_prob); | |
| 564 } | |
| 565 | |
| 566 | |
| 567 JVMState* PredictedCallGenerator::generate(JVMState* jvms) { | |
| 568 GraphKit kit(jvms); | |
| 569 PhaseGVN& gvn = kit.gvn(); | |
| 570 // We need an explicit receiver null_check before checking its type. | |
| 571 // We share a map with the caller, so his JVMS gets adjusted. | |
| 572 Node* receiver = kit.argument(0); | |
| 573 | |
| 574 CompileLog* log = kit.C->log(); | |
| 575 if (log != NULL) { | |
| 576 log->elem("predicted_call bci='%d' klass='%d'", | |
| 577 jvms->bci(), log->identify(_predicted_receiver)); | |
| 578 } | |
| 579 | |
| 580 receiver = kit.null_check_receiver(method()); | |
| 581 if (kit.stopped()) { | |
| 582 return kit.transfer_exceptions_into_jvms(); | |
| 583 } | |
| 584 | |
| 585 Node* exact_receiver = receiver; // will get updated in place... | |
| 586 Node* slow_ctl = kit.type_check_receiver(receiver, | |
| 587 _predicted_receiver, _hit_prob, | |
| 588 &exact_receiver); | |
| 589 | |
| 590 SafePointNode* slow_map = NULL; | |
| 591 JVMState* slow_jvms; | |
| 592 { PreserveJVMState pjvms(&kit); | |
| 593 kit.set_control(slow_ctl); | |
| 594 if (!kit.stopped()) { | |
| 595 slow_jvms = _if_missed->generate(kit.sync_jvms()); | |
| 596 assert(slow_jvms != NULL, "miss path must not fail to generate"); | |
| 597 kit.add_exception_states_from(slow_jvms); | |
| 598 kit.set_map(slow_jvms->map()); | |
| 599 if (!kit.stopped()) | |
| 600 slow_map = kit.stop(); | |
| 601 } | |
| 602 } | |
| 603 | |
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604 if (kit.stopped()) { |
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605 // Instance exactly does not matches the desired type. |
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606 kit.set_jvms(slow_jvms); |
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607 return kit.transfer_exceptions_into_jvms(); |
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608 } |
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609 |
| 0 | 610 // fall through if the instance exactly matches the desired type |
| 611 kit.replace_in_map(receiver, exact_receiver); | |
| 612 | |
| 613 // Make the hot call: | |
| 614 JVMState* new_jvms = _if_hit->generate(kit.sync_jvms()); | |
| 615 if (new_jvms == NULL) { | |
| 616 // Inline failed, so make a direct call. | |
| 617 assert(_if_hit->is_inline(), "must have been a failed inline"); | |
| 618 CallGenerator* cg = CallGenerator::for_direct_call(_if_hit->method()); | |
| 619 new_jvms = cg->generate(kit.sync_jvms()); | |
| 620 } | |
| 621 kit.add_exception_states_from(new_jvms); | |
| 622 kit.set_jvms(new_jvms); | |
| 623 | |
| 624 // Need to merge slow and fast? | |
| 625 if (slow_map == NULL) { | |
| 626 // The fast path is the only path remaining. | |
| 627 return kit.transfer_exceptions_into_jvms(); | |
| 628 } | |
| 629 | |
| 630 if (kit.stopped()) { | |
| 631 // Inlined method threw an exception, so it's just the slow path after all. | |
| 632 kit.set_jvms(slow_jvms); | |
| 633 return kit.transfer_exceptions_into_jvms(); | |
| 634 } | |
| 635 | |
| 636 // Finish the diamond. | |
| 637 kit.C->set_has_split_ifs(true); // Has chance for split-if optimization | |
| 638 RegionNode* region = new (kit.C, 3) RegionNode(3); | |
| 639 region->init_req(1, kit.control()); | |
| 640 region->init_req(2, slow_map->control()); | |
| 641 kit.set_control(gvn.transform(region)); | |
| 642 Node* iophi = PhiNode::make(region, kit.i_o(), Type::ABIO); | |
| 643 iophi->set_req(2, slow_map->i_o()); | |
| 644 kit.set_i_o(gvn.transform(iophi)); | |
| 645 kit.merge_memory(slow_map->merged_memory(), region, 2); | |
| 646 uint tos = kit.jvms()->stkoff() + kit.sp(); | |
| 647 uint limit = slow_map->req(); | |
| 648 for (uint i = TypeFunc::Parms; i < limit; i++) { | |
| 649 // Skip unused stack slots; fast forward to monoff(); | |
| 650 if (i == tos) { | |
| 651 i = kit.jvms()->monoff(); | |
| 652 if( i >= limit ) break; | |
| 653 } | |
| 654 Node* m = kit.map()->in(i); | |
| 655 Node* n = slow_map->in(i); | |
| 656 if (m != n) { | |
| 657 const Type* t = gvn.type(m)->meet(gvn.type(n)); | |
| 658 Node* phi = PhiNode::make(region, m, t); | |
| 659 phi->set_req(2, n); | |
| 660 kit.map()->set_req(i, gvn.transform(phi)); | |
| 661 } | |
| 662 } | |
| 663 return kit.transfer_exceptions_into_jvms(); | |
| 664 } | |
| 665 | |
| 666 | |
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667 //------------------------PredictedDynamicCallGenerator----------------------- |
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668 // Internal class which handles all out-of-line calls checking receiver type. |
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669 class PredictedDynamicCallGenerator : public CallGenerator { |
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670 ciMethodHandle* _predicted_method_handle; |
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671 CallGenerator* _if_missed; |
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672 CallGenerator* _if_hit; |
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673 float _hit_prob; |
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674 |
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675 public: |
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676 PredictedDynamicCallGenerator(ciMethodHandle* predicted_method_handle, |
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677 CallGenerator* if_missed, |
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678 CallGenerator* if_hit, |
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679 float hit_prob) |
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680 : CallGenerator(if_missed->method()), |
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681 _predicted_method_handle(predicted_method_handle), |
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682 _if_missed(if_missed), |
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683 _if_hit(if_hit), |
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684 _hit_prob(hit_prob) |
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685 {} |
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686 |
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687 virtual bool is_inline() const { return _if_hit->is_inline(); } |
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688 virtual bool is_deferred() const { return _if_hit->is_deferred(); } |
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689 |
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690 virtual JVMState* generate(JVMState* jvms); |
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691 }; |
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692 |
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693 |
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694 CallGenerator* CallGenerator::for_predicted_dynamic_call(ciMethodHandle* predicted_method_handle, |
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695 CallGenerator* if_missed, |
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696 CallGenerator* if_hit, |
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697 float hit_prob) { |
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698 return new PredictedDynamicCallGenerator(predicted_method_handle, if_missed, if_hit, hit_prob); |
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699 } |
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700 |
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701 |
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702 CallGenerator* CallGenerator::for_method_handle_inline(Node* method_handle, JVMState* jvms, |
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703 ciMethod* caller, ciMethod* callee, ciCallProfile profile) { |
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704 if (method_handle->Opcode() == Op_ConP) { |
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705 const TypeOopPtr* oop_ptr = method_handle->bottom_type()->is_oopptr(); |
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706 ciObject* const_oop = oop_ptr->const_oop(); |
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707 ciMethodHandle* method_handle = const_oop->as_method_handle(); |
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708 |
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709 // Set the callee to have access to the class and signature in |
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710 // the MethodHandleCompiler. |
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711 method_handle->set_callee(callee); |
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712 method_handle->set_caller(caller); |
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713 method_handle->set_call_profile(profile); |
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714 |
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715 // Get an adapter for the MethodHandle. |
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716 ciMethod* target_method = method_handle->get_method_handle_adapter(); |
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717 if (target_method != NULL) { |
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718 CallGenerator* hit_cg = Compile::current()->call_generator(target_method, -1, false, jvms, true, 1); |
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719 if (hit_cg != NULL && hit_cg->is_inline()) |
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720 return hit_cg; |
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721 } |
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722 } else if (method_handle->Opcode() == Op_Phi && method_handle->req() == 3 && |
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723 method_handle->in(1)->Opcode() == Op_ConP && method_handle->in(2)->Opcode() == Op_ConP) { |
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724 // selectAlternative idiom merging two constant MethodHandles. |
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725 // Generate a guard so that each can be inlined. We might want to |
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726 // do more inputs at later point but this gets the most common |
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727 // case. |
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728 const TypeOopPtr* oop_ptr = method_handle->in(1)->bottom_type()->is_oopptr(); |
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729 ciObject* const_oop = oop_ptr->const_oop(); |
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730 ciMethodHandle* mh = const_oop->as_method_handle(); |
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731 |
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732 CallGenerator* cg1 = for_method_handle_inline(method_handle->in(1), jvms, caller, callee, profile); |
|
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|
733 CallGenerator* cg2 = for_method_handle_inline(method_handle->in(2), jvms, caller, callee, profile); |
|
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|
734 if (cg1 != NULL && cg2 != NULL) { |
|
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|
735 return new PredictedDynamicCallGenerator(mh, cg2, cg1, PROB_FAIR); |
|
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|
736 } |
|
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|
737 } |
|
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|
738 return NULL; |
|
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|
739 } |
|
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changeset
|
740 |
|
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changeset
|
741 |
|
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|
742 CallGenerator* CallGenerator::for_invokedynamic_inline(ciCallSite* call_site, JVMState* jvms, |
|
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|
743 ciMethod* caller, ciMethod* callee, ciCallProfile profile) { |
|
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744 assert(call_site->is_constant_call_site() || call_site->is_mutable_call_site(), "must be"); |
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745 ciMethodHandle* method_handle = call_site->get_target(); |
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|
746 |
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|
747 // Set the callee to have access to the class and signature in the |
|
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|
748 // MethodHandleCompiler. |
|
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|
749 method_handle->set_callee(callee); |
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750 method_handle->set_caller(caller); |
|
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751 method_handle->set_call_profile(profile); |
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|
752 |
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|
753 // Get an adapter for the MethodHandle. |
|
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754 ciMethod* target_method = method_handle->get_invokedynamic_adapter(); |
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755 if (target_method != NULL) { |
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756 Compile *C = Compile::current(); |
|
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757 CallGenerator* hit_cg = C->call_generator(target_method, -1, false, jvms, true, PROB_ALWAYS); |
|
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758 if (hit_cg != NULL && hit_cg->is_inline()) { |
|
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|
759 // Add a dependence for invalidation of the optimization. |
|
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|
760 if (call_site->is_mutable_call_site()) { |
|
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|
761 C->dependencies()->assert_call_site_target_value(C->env()->CallSite_klass(), call_site, method_handle); |
|
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|
762 } |
|
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|
763 return hit_cg; |
|
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|
764 } |
|
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|
765 } |
|
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|
766 return NULL; |
|
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|
767 } |
|
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changeset
|
768 |
|
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changeset
|
769 |
|
1138
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|
770 JVMState* PredictedDynamicCallGenerator::generate(JVMState* jvms) { |
|
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|
771 GraphKit kit(jvms); |
|
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|
772 PhaseGVN& gvn = kit.gvn(); |
|
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|
773 |
|
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|
774 CompileLog* log = kit.C->log(); |
|
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|
775 if (log != NULL) { |
|
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|
776 log->elem("predicted_dynamic_call bci='%d'", jvms->bci()); |
|
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|
777 } |
|
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|
778 |
|
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|
779 const TypeOopPtr* predicted_mh_ptr = TypeOopPtr::make_from_constant(_predicted_method_handle, true); |
|
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780 Node* predicted_mh = kit.makecon(predicted_mh_ptr); |
|
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|
781 |
|
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|
782 Node* bol = NULL; |
|
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|
783 int bc = jvms->method()->java_code_at_bci(jvms->bci()); |
|
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|
784 if (bc == Bytecodes::_invokespecial) { |
|
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changeset
|
785 // This is the selectAlternative idiom for guardWithTest |
|
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changeset
|
786 Node* receiver = kit.argument(0); |
|
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changeset
|
787 |
|
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changeset
|
788 // Check if the MethodHandle is the expected one |
|
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|
789 Node* cmp = gvn.transform(new(kit.C, 3) CmpPNode(receiver, predicted_mh)); |
|
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|
790 bol = gvn.transform(new(kit.C, 2) BoolNode(cmp, BoolTest::eq) ); |
|
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|
791 } else { |
|
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changeset
|
792 assert(bc == Bytecodes::_invokedynamic, "must be"); |
|
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changeset
|
793 // Get the constant pool cache from the caller class. |
|
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changeset
|
794 ciMethod* caller_method = jvms->method(); |
|
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|
795 ciBytecodeStream str(caller_method); |
|
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|
796 str.force_bci(jvms->bci()); // Set the stream to the invokedynamic bci. |
|
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|
797 ciCPCache* cpcache = str.get_cpcache(); |
|
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changeset
|
798 |
|
f918d6096e23
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diff
changeset
|
799 // Get the offset of the CallSite from the constant pool cache |
|
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diff
changeset
|
800 // pointer. |
|
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changeset
|
801 int index = str.get_method_index(); |
|
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changeset
|
802 size_t call_site_offset = cpcache->get_f1_offset(index); |
|
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changeset
|
803 |
|
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changeset
|
804 // Load the CallSite object from the constant pool cache. |
|
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changeset
|
805 const TypeOopPtr* cpcache_ptr = TypeOopPtr::make_from_constant(cpcache); |
|
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changeset
|
806 Node* cpcache_adr = kit.makecon(cpcache_ptr); |
|
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changeset
|
807 Node* call_site_adr = kit.basic_plus_adr(cpcache_adr, cpcache_adr, call_site_offset); |
|
f918d6096e23
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changeset
|
808 Node* call_site = kit.make_load(kit.control(), call_site_adr, TypeInstPtr::BOTTOM, T_OBJECT, Compile::AliasIdxRaw); |
|
f918d6096e23
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diff
changeset
|
809 |
|
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diff
changeset
|
810 // Load the target MethodHandle from the CallSite object. |
|
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changeset
|
811 Node* target_adr = kit.basic_plus_adr(call_site, call_site, java_lang_invoke_CallSite::target_offset_in_bytes()); |
|
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|
812 Node* target_mh = kit.make_load(kit.control(), target_adr, TypeInstPtr::BOTTOM, T_OBJECT); |
|
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diff
changeset
|
813 |
|
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changeset
|
814 // Check if the MethodHandle is still the same. |
|
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changeset
|
815 Node* cmp = gvn.transform(new(kit.C, 3) CmpPNode(target_mh, predicted_mh)); |
|
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|
816 bol = gvn.transform(new(kit.C, 2) BoolNode(cmp, BoolTest::eq) ); |
|
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|
817 } |
|
1138
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|
818 IfNode* iff = kit.create_and_xform_if(kit.control(), bol, _hit_prob, COUNT_UNKNOWN); |
|
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|
819 kit.set_control( gvn.transform(new(kit.C, 1) IfTrueNode (iff))); |
|
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|
820 Node* slow_ctl = gvn.transform(new(kit.C, 1) IfFalseNode(iff)); |
|
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|
821 |
|
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changeset
|
822 SafePointNode* slow_map = NULL; |
|
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|
823 JVMState* slow_jvms; |
|
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|
824 { PreserveJVMState pjvms(&kit); |
|
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|
825 kit.set_control(slow_ctl); |
|
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|
826 if (!kit.stopped()) { |
|
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|
827 slow_jvms = _if_missed->generate(kit.sync_jvms()); |
|
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|
828 assert(slow_jvms != NULL, "miss path must not fail to generate"); |
|
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|
829 kit.add_exception_states_from(slow_jvms); |
|
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|
830 kit.set_map(slow_jvms->map()); |
|
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|
831 if (!kit.stopped()) |
|
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|
832 slow_map = kit.stop(); |
|
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|
833 } |
|
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|
834 } |
|
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|
835 |
|
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|
836 if (kit.stopped()) { |
|
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|
837 // Instance exactly does not matches the desired type. |
|
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|
838 kit.set_jvms(slow_jvms); |
|
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|
839 return kit.transfer_exceptions_into_jvms(); |
|
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|
840 } |
|
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|
841 |
|
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|
842 // Make the hot call: |
|
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|
843 JVMState* new_jvms = _if_hit->generate(kit.sync_jvms()); |
|
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|
844 if (new_jvms == NULL) { |
|
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|
845 // Inline failed, so make a direct call. |
|
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|
846 assert(_if_hit->is_inline(), "must have been a failed inline"); |
|
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|
847 CallGenerator* cg = CallGenerator::for_direct_call(_if_hit->method()); |
|
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|
848 new_jvms = cg->generate(kit.sync_jvms()); |
|
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|
849 } |
|
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|
850 kit.add_exception_states_from(new_jvms); |
|
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|
851 kit.set_jvms(new_jvms); |
|
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|
852 |
|
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|
853 // Need to merge slow and fast? |
|
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854 if (slow_map == NULL) { |
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855 // The fast path is the only path remaining. |
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856 return kit.transfer_exceptions_into_jvms(); |
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857 } |
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858 |
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859 if (kit.stopped()) { |
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860 // Inlined method threw an exception, so it's just the slow path after all. |
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861 kit.set_jvms(slow_jvms); |
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862 return kit.transfer_exceptions_into_jvms(); |
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863 } |
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864 |
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865 // Finish the diamond. |
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866 kit.C->set_has_split_ifs(true); // Has chance for split-if optimization |
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867 RegionNode* region = new (kit.C, 3) RegionNode(3); |
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868 region->init_req(1, kit.control()); |
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869 region->init_req(2, slow_map->control()); |
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870 kit.set_control(gvn.transform(region)); |
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871 Node* iophi = PhiNode::make(region, kit.i_o(), Type::ABIO); |
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872 iophi->set_req(2, slow_map->i_o()); |
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873 kit.set_i_o(gvn.transform(iophi)); |
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874 kit.merge_memory(slow_map->merged_memory(), region, 2); |
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875 uint tos = kit.jvms()->stkoff() + kit.sp(); |
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876 uint limit = slow_map->req(); |
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877 for (uint i = TypeFunc::Parms; i < limit; i++) { |
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878 // Skip unused stack slots; fast forward to monoff(); |
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879 if (i == tos) { |
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880 i = kit.jvms()->monoff(); |
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881 if( i >= limit ) break; |
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882 } |
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883 Node* m = kit.map()->in(i); |
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884 Node* n = slow_map->in(i); |
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885 if (m != n) { |
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886 const Type* t = gvn.type(m)->meet(gvn.type(n)); |
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887 Node* phi = PhiNode::make(region, m, t); |
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888 phi->set_req(2, n); |
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889 kit.map()->set_req(i, gvn.transform(phi)); |
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890 } |
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891 } |
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892 return kit.transfer_exceptions_into_jvms(); |
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893 } |
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894 |
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895 |
| 0 | 896 //-------------------------UncommonTrapCallGenerator----------------------------- |
| 897 // Internal class which handles all out-of-line calls checking receiver type. | |
| 898 class UncommonTrapCallGenerator : public CallGenerator { | |
| 899 Deoptimization::DeoptReason _reason; | |
| 900 Deoptimization::DeoptAction _action; | |
| 901 | |
| 902 public: | |
| 903 UncommonTrapCallGenerator(ciMethod* m, | |
| 904 Deoptimization::DeoptReason reason, | |
| 905 Deoptimization::DeoptAction action) | |
| 906 : CallGenerator(m) | |
| 907 { | |
| 908 _reason = reason; | |
| 909 _action = action; | |
| 910 } | |
| 911 | |
| 912 virtual bool is_virtual() const { ShouldNotReachHere(); return false; } | |
| 913 virtual bool is_trap() const { return true; } | |
| 914 | |
| 915 virtual JVMState* generate(JVMState* jvms); | |
| 916 }; | |
| 917 | |
| 918 | |
| 919 CallGenerator* | |
| 920 CallGenerator::for_uncommon_trap(ciMethod* m, | |
| 921 Deoptimization::DeoptReason reason, | |
| 922 Deoptimization::DeoptAction action) { | |
| 923 return new UncommonTrapCallGenerator(m, reason, action); | |
| 924 } | |
| 925 | |
| 926 | |
| 927 JVMState* UncommonTrapCallGenerator::generate(JVMState* jvms) { | |
| 928 GraphKit kit(jvms); | |
| 929 // Take the trap with arguments pushed on the stack. (Cf. null_check_receiver). | |
| 930 int nargs = method()->arg_size(); | |
| 931 kit.inc_sp(nargs); | |
| 932 assert(nargs <= kit.sp() && kit.sp() <= jvms->stk_size(), "sane sp w/ args pushed"); | |
| 933 if (_reason == Deoptimization::Reason_class_check && | |
| 934 _action == Deoptimization::Action_maybe_recompile) { | |
| 935 // Temp fix for 6529811 | |
| 936 // Don't allow uncommon_trap to override our decision to recompile in the event | |
| 937 // of a class cast failure for a monomorphic call as it will never let us convert | |
| 938 // the call to either bi-morphic or megamorphic and can lead to unc-trap loops | |
| 939 bool keep_exact_action = true; | |
| 940 kit.uncommon_trap(_reason, _action, NULL, "monomorphic vcall checkcast", false, keep_exact_action); | |
| 941 } else { | |
| 942 kit.uncommon_trap(_reason, _action); | |
| 943 } | |
| 944 return kit.transfer_exceptions_into_jvms(); | |
| 945 } | |
| 946 | |
| 947 // (Note: Moved hook_up_call to GraphKit::set_edges_for_java_call.) | |
| 948 | |
| 949 // (Node: Merged hook_up_exits into ParseGenerator::generate.) | |
| 950 | |
| 951 #define NODES_OVERHEAD_PER_METHOD (30.0) | |
| 952 #define NODES_PER_BYTECODE (9.5) | |
| 953 | |
| 954 void WarmCallInfo::init(JVMState* call_site, ciMethod* call_method, ciCallProfile& profile, float prof_factor) { | |
| 955 int call_count = profile.count(); | |
| 956 int code_size = call_method->code_size(); | |
| 957 | |
| 958 // Expected execution count is based on the historical count: | |
| 959 _count = call_count < 0 ? 1 : call_site->method()->scale_count(call_count, prof_factor); | |
| 960 | |
| 961 // Expected profit from inlining, in units of simple call-overheads. | |
| 962 _profit = 1.0; | |
| 963 | |
| 964 // Expected work performed by the call in units of call-overheads. | |
| 965 // %%% need an empirical curve fit for "work" (time in call) | |
| 966 float bytecodes_per_call = 3; | |
| 967 _work = 1.0 + code_size / bytecodes_per_call; | |
| 968 | |
| 969 // Expected size of compilation graph: | |
| 970 // -XX:+PrintParseStatistics once reported: | |
| 971 // Methods seen: 9184 Methods parsed: 9184 Nodes created: 1582391 | |
| 972 // Histogram of 144298 parsed bytecodes: | |
| 973 // %%% Need an better predictor for graph size. | |
| 974 _size = NODES_OVERHEAD_PER_METHOD + (NODES_PER_BYTECODE * code_size); | |
| 975 } | |
| 976 | |
| 977 // is_cold: Return true if the node should never be inlined. | |
| 978 // This is true if any of the key metrics are extreme. | |
| 979 bool WarmCallInfo::is_cold() const { | |
| 980 if (count() < WarmCallMinCount) return true; | |
| 981 if (profit() < WarmCallMinProfit) return true; | |
| 982 if (work() > WarmCallMaxWork) return true; | |
| 983 if (size() > WarmCallMaxSize) return true; | |
| 984 return false; | |
| 985 } | |
| 986 | |
| 987 // is_hot: Return true if the node should be inlined immediately. | |
| 988 // This is true if any of the key metrics are extreme. | |
| 989 bool WarmCallInfo::is_hot() const { | |
| 990 assert(!is_cold(), "eliminate is_cold cases before testing is_hot"); | |
| 991 if (count() >= HotCallCountThreshold) return true; | |
| 992 if (profit() >= HotCallProfitThreshold) return true; | |
| 993 if (work() <= HotCallTrivialWork) return true; | |
| 994 if (size() <= HotCallTrivialSize) return true; | |
| 995 return false; | |
| 996 } | |
| 997 | |
| 998 // compute_heat: | |
| 999 float WarmCallInfo::compute_heat() const { | |
| 1000 assert(!is_cold(), "compute heat only on warm nodes"); | |
| 1001 assert(!is_hot(), "compute heat only on warm nodes"); | |
| 1002 int min_size = MAX2(0, (int)HotCallTrivialSize); | |
| 1003 int max_size = MIN2(500, (int)WarmCallMaxSize); | |
| 1004 float method_size = (size() - min_size) / MAX2(1, max_size - min_size); | |
| 1005 float size_factor; | |
| 1006 if (method_size < 0.05) size_factor = 4; // 2 sigmas better than avg. | |
| 1007 else if (method_size < 0.15) size_factor = 2; // 1 sigma better than avg. | |
| 1008 else if (method_size < 0.5) size_factor = 1; // better than avg. | |
| 1009 else size_factor = 0.5; // worse than avg. | |
| 1010 return (count() * profit() * size_factor); | |
| 1011 } | |
| 1012 | |
| 1013 bool WarmCallInfo::warmer_than(WarmCallInfo* that) { | |
| 1014 assert(this != that, "compare only different WCIs"); | |
| 1015 assert(this->heat() != 0 && that->heat() != 0, "call compute_heat 1st"); | |
| 1016 if (this->heat() > that->heat()) return true; | |
| 1017 if (this->heat() < that->heat()) return false; | |
| 1018 assert(this->heat() == that->heat(), "no NaN heat allowed"); | |
| 1019 // Equal heat. Break the tie some other way. | |
| 1020 if (!this->call() || !that->call()) return (address)this > (address)that; | |
| 1021 return this->call()->_idx > that->call()->_idx; | |
| 1022 } | |
| 1023 | |
| 1024 //#define UNINIT_NEXT ((WarmCallInfo*)badAddress) | |
| 1025 #define UNINIT_NEXT ((WarmCallInfo*)NULL) | |
| 1026 | |
| 1027 WarmCallInfo* WarmCallInfo::insert_into(WarmCallInfo* head) { | |
| 1028 assert(next() == UNINIT_NEXT, "not yet on any list"); | |
| 1029 WarmCallInfo* prev_p = NULL; | |
| 1030 WarmCallInfo* next_p = head; | |
| 1031 while (next_p != NULL && next_p->warmer_than(this)) { | |
| 1032 prev_p = next_p; | |
| 1033 next_p = prev_p->next(); | |
| 1034 } | |
| 1035 // Install this between prev_p and next_p. | |
| 1036 this->set_next(next_p); | |
| 1037 if (prev_p == NULL) | |
| 1038 head = this; | |
| 1039 else | |
| 1040 prev_p->set_next(this); | |
| 1041 return head; | |
| 1042 } | |
| 1043 | |
| 1044 WarmCallInfo* WarmCallInfo::remove_from(WarmCallInfo* head) { | |
| 1045 WarmCallInfo* prev_p = NULL; | |
| 1046 WarmCallInfo* next_p = head; | |
| 1047 while (next_p != this) { | |
| 1048 assert(next_p != NULL, "this must be in the list somewhere"); | |
| 1049 prev_p = next_p; | |
| 1050 next_p = prev_p->next(); | |
| 1051 } | |
| 1052 next_p = this->next(); | |
| 1053 debug_only(this->set_next(UNINIT_NEXT)); | |
| 1054 // Remove this from between prev_p and next_p. | |
| 1055 if (prev_p == NULL) | |
| 1056 head = next_p; | |
| 1057 else | |
| 1058 prev_p->set_next(next_p); | |
| 1059 return head; | |
| 1060 } | |
| 1061 | |
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1062 WarmCallInfo WarmCallInfo::_always_hot(WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE(), |
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1063 WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE()); |
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1064 WarmCallInfo WarmCallInfo::_always_cold(WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE(), |
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1065 WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE()); |
| 0 | 1066 |
| 1067 WarmCallInfo* WarmCallInfo::always_hot() { | |
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1068 assert(_always_hot.is_hot(), "must always be hot"); |
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1069 return &_always_hot; |
| 0 | 1070 } |
| 1071 | |
| 1072 WarmCallInfo* WarmCallInfo::always_cold() { | |
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1073 assert(_always_cold.is_cold(), "must always be cold"); |
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1074 return &_always_cold; |
| 0 | 1075 } |
| 1076 | |
| 1077 | |
| 1078 #ifndef PRODUCT | |
| 1079 | |
| 1080 void WarmCallInfo::print() const { | |
| 1081 tty->print("%s : C=%6.1f P=%6.1f W=%6.1f S=%6.1f H=%6.1f -> %p", | |
| 1082 is_cold() ? "cold" : is_hot() ? "hot " : "warm", | |
| 1083 count(), profit(), work(), size(), compute_heat(), next()); | |
| 1084 tty->cr(); | |
| 1085 if (call() != NULL) call()->dump(); | |
| 1086 } | |
| 1087 | |
| 1088 void print_wci(WarmCallInfo* ci) { | |
| 1089 ci->print(); | |
| 1090 } | |
| 1091 | |
| 1092 void WarmCallInfo::print_all() const { | |
| 1093 for (const WarmCallInfo* p = this; p != NULL; p = p->next()) | |
| 1094 p->print(); | |
| 1095 } | |
| 1096 | |
| 1097 int WarmCallInfo::count_all() const { | |
| 1098 int cnt = 0; | |
| 1099 for (const WarmCallInfo* p = this; p != NULL; p = p->next()) | |
| 1100 cnt++; | |
| 1101 return cnt; | |
| 1102 } | |
| 1103 | |
| 1104 #endif //PRODUCT |