annotate src/share/vm/opto/doCall.cpp @ 6248:33cc0d9740a8

8007988: PrintInlining output is inconsistent with incremental inlining Summary: fix duplicate and conflicting inlining output Reviewed-by: kvn, vlivanov
author roland
date Wed, 09 Apr 2014 09:17:43 +0200
parents 12cd03f831d8
children b722c15be816
rev   line source
duke@0 1 /*
mikael@5776 2 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
stefank@1879 25 #include "precompiled.hpp"
stefank@1879 26 #include "ci/ciCallSite.hpp"
stefank@1879 27 #include "ci/ciMethodHandle.hpp"
stefank@1879 28 #include "classfile/vmSymbols.hpp"
twisti@2252 29 #include "compiler/compileBroker.hpp"
stefank@1879 30 #include "compiler/compileLog.hpp"
stefank@1879 31 #include "interpreter/linkResolver.hpp"
stefank@1879 32 #include "opto/addnode.hpp"
stefank@1879 33 #include "opto/callGenerator.hpp"
morris@6219 34 #include "opto/castnode.hpp"
stefank@1879 35 #include "opto/cfgnode.hpp"
stefank@1879 36 #include "opto/mulnode.hpp"
stefank@1879 37 #include "opto/parse.hpp"
stefank@1879 38 #include "opto/rootnode.hpp"
stefank@1879 39 #include "opto/runtime.hpp"
stefank@1879 40 #include "opto/subnode.hpp"
stefank@1879 41 #include "prims/nativeLookup.hpp"
stefank@1879 42 #include "runtime/sharedRuntime.hpp"
duke@0 43
roland@3922 44 void trace_type_profile(Compile* C, ciMethod *method, int depth, int bci, ciMethod *prof_method, ciKlass *prof_klass, int site_count, int receiver_count) {
kvn@5328 45 if (TraceTypeProfile || C->print_inlining()) {
roland@3922 46 outputStream* out = tty;
kvn@5328 47 if (!C->print_inlining()) {
twisti@3669 48 if (NOT_PRODUCT(!PrintOpto &&) !PrintCompilation) {
twisti@2252 49 method->print_short_name();
twisti@2252 50 tty->cr();
twisti@2252 51 }
twisti@2252 52 CompileTask::print_inlining(prof_method, depth, bci);
roland@3922 53 } else {
roland@3922 54 out = C->print_inlining_stream();
duke@0 55 }
roland@3922 56 CompileTask::print_inline_indent(depth, out);
roland@3922 57 out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);
roland@3922 58 stringStream ss;
roland@3922 59 prof_klass->name()->print_symbol_on(&ss);
roland@3922 60 out->print(ss.as_string());
roland@3922 61 out->cr();
duke@0 62 }
duke@0 63 }
duke@0 64
twisti@3979 65 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
jrose@1157 66 JVMState* jvms, bool allow_inline,
roland@5556 67 float prof_factor, ciKlass* speculative_receiver_type,
roland@5556 68 bool allow_intrinsics, bool delayed_forbidden) {
twisti@2468 69 ciMethod* caller = jvms->method();
twisti@2468 70 int bci = jvms->bci();
twisti@2468 71 Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
twisti@3534 72 guarantee(callee != NULL, "failed method resolution");
duke@0 73
duke@0 74 // Dtrace currently doesn't work unless all calls are vanilla
kvn@780 75 if (env()->dtrace_method_probes()) {
duke@0 76 allow_inline = false;
duke@0 77 }
duke@0 78
duke@0 79 // Note: When we get profiling during stage-1 compiles, we want to pull
duke@0 80 // from more specific profile data which pertains to this inlining.
duke@0 81 // Right now, ignore the information in jvms->caller(), and do method[bci].
twisti@2468 82 ciCallProfile profile = caller->call_profile_at_bci(bci);
duke@0 83
duke@0 84 // See how many times this site has been invoked.
duke@0 85 int site_count = profile.count();
duke@0 86 int receiver_count = -1;
twisti@3979 87 if (call_does_dispatch && UseTypeProfile && profile.has_receiver(0)) {
duke@0 88 // Receivers in the profile structure are ordered by call counts
duke@0 89 // so that the most called (major) receiver is profile.receiver(0).
duke@0 90 receiver_count = profile.receiver_count(0);
duke@0 91 }
duke@0 92
duke@0 93 CompileLog* log = this->log();
duke@0 94 if (log != NULL) {
duke@0 95 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1;
kvn@1251 96 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1;
duke@0 97 log->begin_elem("call method='%d' count='%d' prof_factor='%g'",
twisti@3534 98 log->identify(callee), site_count, prof_factor);
twisti@3979 99 if (call_does_dispatch) log->print(" virtual='1'");
duke@0 100 if (allow_inline) log->print(" inline='1'");
duke@0 101 if (receiver_count >= 0) {
duke@0 102 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count);
duke@0 103 if (profile.has_receiver(1)) {
duke@0 104 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1));
duke@0 105 }
duke@0 106 }
duke@0 107 log->end_elem();
duke@0 108 }
duke@0 109
duke@0 110 // Special case the handling of certain common, profitable library
duke@0 111 // methods. If these methods are replaced with specialized code,
duke@0 112 // then we return it as the inlined version of the call.
duke@0 113 // We do this before the strict f.p. check below because the
duke@0 114 // intrinsics handle strict f.p. correctly.
shade@5363 115 CallGenerator* cg_intrinsic = NULL;
never@3196 116 if (allow_inline && allow_intrinsics) {
twisti@3979 117 CallGenerator* cg = find_intrinsic(callee, call_does_dispatch);
kvn@3770 118 if (cg != NULL) {
kvn@3770 119 if (cg->is_predicted()) {
kvn@3770 120 // Code without intrinsic but, hopefully, inlined.
kvn@3770 121 CallGenerator* inline_cg = this->call_generator(callee,
roland@5556 122 vtable_index, call_does_dispatch, jvms, allow_inline, prof_factor, speculative_receiver_type, false);
kvn@3770 123 if (inline_cg != NULL) {
kvn@3770 124 cg = CallGenerator::for_predicted_intrinsic(cg, inline_cg);
kvn@3770 125 }
kvn@3770 126 }
shade@5363 127
shade@5363 128 // If intrinsic does the virtual dispatch, we try to use the type profile
shade@5363 129 // first, and hopefully inline it as the regular virtual call below.
shade@5363 130 // We will retry the intrinsic if nothing had claimed it afterwards.
shade@5363 131 if (cg->does_virtual_dispatch()) {
shade@5363 132 cg_intrinsic = cg;
shade@5363 133 cg = NULL;
shade@5363 134 } else {
shade@5363 135 return cg;
shade@5363 136 }
kvn@3770 137 }
duke@0 138 }
duke@0 139
twisti@2615 140 // Do method handle calls.
twisti@1743 141 // NOTE: This must happen before normal inlining logic below since
twisti@1743 142 // MethodHandle.invoke* are native methods which obviously don't
twisti@1743 143 // have bytecodes and so normal inlining fails.
twisti@3534 144 if (callee->is_method_handle_intrinsic()) {
roland@3974 145 CallGenerator* cg = CallGenerator::for_method_handle_call(jvms, caller, callee, delayed_forbidden);
twisti@3979 146 assert(cg == NULL || !delayed_forbidden || !cg->is_late_inline() || cg->is_mh_late_inline(), "unexpected CallGenerator");
roland@3974 147 return cg;
twisti@1743 148 }
twisti@1743 149
duke@0 150 // Do not inline strict fp into non-strict code, or the reverse
twisti@3534 151 if (caller->is_strict() ^ callee->is_strict()) {
duke@0 152 allow_inline = false;
duke@0 153 }
duke@0 154
duke@0 155 // Attempt to inline...
duke@0 156 if (allow_inline) {
duke@0 157 // The profile data is only partly attributable to this caller,
duke@0 158 // scale back the call site information.
duke@0 159 float past_uses = jvms->method()->scale_count(site_count, prof_factor);
duke@0 160 // This is the number of times we expect the call code to be used.
duke@0 161 float expected_uses = past_uses;
duke@0 162
duke@0 163 // Try inlining a bytecoded method:
twisti@3979 164 if (!call_does_dispatch) {
shade@5938 165 InlineTree* ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method());
duke@0 166 WarmCallInfo scratch_ci;
roland@3974 167 bool should_delay = false;
roland@3974 168 WarmCallInfo* ci = ilt->ok_to_inline(callee, jvms, profile, &scratch_ci, should_delay);
duke@0 169 assert(ci != &scratch_ci, "do not let this pointer escape");
duke@0 170 bool allow_inline = (ci != NULL && !ci->is_cold());
duke@0 171 bool require_inline = (allow_inline && ci->is_hot());
duke@0 172
duke@0 173 if (allow_inline) {
twisti@3534 174 CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses);
roland@3974 175
roland@3974 176 if (require_inline && cg != NULL) {
never@1080 177 // Delay the inlining of this method to give us the
never@1080 178 // opportunity to perform some high level optimizations
never@1080 179 // first.
kvn@4675 180 if (should_delay_string_inlining(callee, jvms)) {
roland@3974 181 assert(!delayed_forbidden, "strange");
roland@3974 182 return CallGenerator::for_string_late_inline(callee, cg);
kvn@4675 183 } else if (should_delay_boxing_inlining(callee, jvms)) {
kvn@4675 184 assert(!delayed_forbidden, "strange");
kvn@4675 185 return CallGenerator::for_boxing_late_inline(callee, cg);
roland@3974 186 } else if ((should_delay || AlwaysIncrementalInline) && !delayed_forbidden) {
roland@3974 187 return CallGenerator::for_late_inline(callee, cg);
roland@3974 188 }
never@1080 189 }
roland@3974 190 if (cg == NULL || should_delay) {
duke@0 191 // Fall through.
duke@0 192 } else if (require_inline || !InlineWarmCalls) {
duke@0 193 return cg;
duke@0 194 } else {
twisti@3979 195 CallGenerator* cold_cg = call_generator(callee, vtable_index, call_does_dispatch, jvms, false, prof_factor);
duke@0 196 return CallGenerator::for_warm_call(ci, cold_cg, cg);
duke@0 197 }
duke@0 198 }
duke@0 199 }
duke@0 200
duke@0 201 // Try using the type profile.
twisti@3979 202 if (call_does_dispatch && site_count > 0 && receiver_count > 0) {
duke@0 203 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count.
duke@0 204 bool have_major_receiver = (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent);
duke@0 205 ciMethod* receiver_method = NULL;
roland@5556 206
roland@5556 207 int morphism = profile.morphism();
roland@5556 208 if (speculative_receiver_type != NULL) {
roland@5556 209 // We have a speculative type, we should be able to resolve
roland@5556 210 // the call. We do that before looking at the profiling at
roland@5556 211 // this invoke because it may lead to bimorphic inlining which
roland@5556 212 // a speculative type should help us avoid.
roland@5556 213 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
roland@5556 214 speculative_receiver_type);
roland@5556 215 if (receiver_method == NULL) {
roland@5556 216 speculative_receiver_type = NULL;
roland@5556 217 } else {
roland@5556 218 morphism = 1;
roland@5556 219 }
roland@5556 220 }
roland@5556 221 if (receiver_method == NULL &&
roland@5556 222 (have_major_receiver || morphism == 1 ||
roland@5556 223 (morphism == 2 && UseBimorphicInlining))) {
duke@0 224 // receiver_method = profile.method();
duke@0 225 // Profiles do not suggest methods now. Look it up in the major receiver.
twisti@3534 226 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
duke@0 227 profile.receiver(0));
duke@0 228 }
duke@0 229 if (receiver_method != NULL) {
duke@0 230 // The single majority receiver sufficiently outweighs the minority.
duke@0 231 CallGenerator* hit_cg = this->call_generator(receiver_method,
twisti@3979 232 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
duke@0 233 if (hit_cg != NULL) {
duke@0 234 // Look up second receiver.
duke@0 235 CallGenerator* next_hit_cg = NULL;
duke@0 236 ciMethod* next_receiver_method = NULL;
roland@5556 237 if (morphism == 2 && UseBimorphicInlining) {
twisti@3534 238 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(),
duke@0 239 profile.receiver(1));
duke@0 240 if (next_receiver_method != NULL) {
duke@0 241 next_hit_cg = this->call_generator(next_receiver_method,
twisti@3979 242 vtable_index, !call_does_dispatch, jvms,
duke@0 243 allow_inline, prof_factor);
duke@0 244 if (next_hit_cg != NULL && !next_hit_cg->is_inline() &&
duke@0 245 have_major_receiver && UseOnlyInlinedBimorphic) {
duke@0 246 // Skip if we can't inline second receiver's method
duke@0 247 next_hit_cg = NULL;
duke@0 248 }
duke@0 249 }
duke@0 250 }
duke@0 251 CallGenerator* miss_cg;
roland@5556 252 Deoptimization::DeoptReason reason = morphism == 2 ?
roland@6216 253 Deoptimization::Reason_bimorphic : Deoptimization::reason_class_check(speculative_receiver_type != NULL);
roland@5556 254 if ((morphism == 1 || (morphism == 2 && next_hit_cg != NULL)) &&
kvn@1206 255 !too_many_traps(jvms->method(), jvms->bci(), reason)
duke@0 256 ) {
duke@0 257 // Generate uncommon trap for class check failure path
duke@0 258 // in case of monomorphic or bimorphic virtual call site.
twisti@3534 259 miss_cg = CallGenerator::for_uncommon_trap(callee, reason,
duke@0 260 Deoptimization::Action_maybe_recompile);
duke@0 261 } else {
duke@0 262 // Generate virtual call for class check failure path
duke@0 263 // in case of polymorphic virtual call site.
twisti@3534 264 miss_cg = CallGenerator::for_virtual_call(callee, vtable_index);
duke@0 265 }
duke@0 266 if (miss_cg != NULL) {
duke@0 267 if (next_hit_cg != NULL) {
roland@5556 268 assert(speculative_receiver_type == NULL, "shouldn't end up here if we used speculation");
roland@3922 269 trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1));
duke@0 270 // We don't need to record dependency on a receiver here and below.
duke@0 271 // Whenever we inline, the dependency is added by Parse::Parse().
duke@0 272 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX);
duke@0 273 }
duke@0 274 if (miss_cg != NULL) {
roland@3922 275 trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), receiver_method, profile.receiver(0), site_count, receiver_count);
roland@5556 276 ciKlass* k = speculative_receiver_type != NULL ? speculative_receiver_type : profile.receiver(0);
roland@5556 277 float hit_prob = speculative_receiver_type != NULL ? 1.0 : profile.receiver_prob(0);
roland@5556 278 CallGenerator* cg = CallGenerator::for_predicted_call(k, miss_cg, hit_cg, hit_prob);
duke@0 279 if (cg != NULL) return cg;
duke@0 280 }
duke@0 281 }
duke@0 282 }
duke@0 283 }
duke@0 284 }
duke@0 285 }
duke@0 286
shade@5363 287 // Nothing claimed the intrinsic, we go with straight-forward inlining
shade@5363 288 // for already discovered intrinsic.
shade@5363 289 if (allow_inline && allow_intrinsics && cg_intrinsic != NULL) {
shade@5363 290 assert(cg_intrinsic->does_virtual_dispatch(), "sanity");
shade@5363 291 return cg_intrinsic;
shade@5363 292 }
shade@5363 293
duke@0 294 // There was no special inlining tactic, or it bailed out.
duke@0 295 // Use a more generic tactic, like a simple call.
twisti@3979 296 if (call_does_dispatch) {
roland@6248 297 const char* msg = "virtual call";
roland@6248 298 if (PrintInlining) print_inlining(callee, jvms->depth() - 1, jvms->bci(), msg);
twisti@3534 299 return CallGenerator::for_virtual_call(callee, vtable_index);
duke@0 300 } else {
duke@0 301 // Class Hierarchy Analysis or Type Profile reveals a unique target,
duke@0 302 // or it is a static or special call.
twisti@3534 303 return CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms));
duke@0 304 }
duke@0 305 }
duke@0 306
never@1080 307 // Return true for methods that shouldn't be inlined early so that
never@1080 308 // they are easier to analyze and optimize as intrinsics.
kvn@4675 309 bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {
never@1080 310 if (has_stringbuilder()) {
never@1080 311
never@1080 312 if ((call_method->holder() == C->env()->StringBuilder_klass() ||
never@1080 313 call_method->holder() == C->env()->StringBuffer_klass()) &&
never@1080 314 (jvms->method()->holder() == C->env()->StringBuilder_klass() ||
never@1080 315 jvms->method()->holder() == C->env()->StringBuffer_klass())) {
never@1080 316 // Delay SB calls only when called from non-SB code
never@1080 317 return false;
never@1080 318 }
never@1080 319
never@1080 320 switch (call_method->intrinsic_id()) {
never@1080 321 case vmIntrinsics::_StringBuilder_void:
never@1080 322 case vmIntrinsics::_StringBuilder_int:
never@1080 323 case vmIntrinsics::_StringBuilder_String:
never@1080 324 case vmIntrinsics::_StringBuilder_append_char:
never@1080 325 case vmIntrinsics::_StringBuilder_append_int:
never@1080 326 case vmIntrinsics::_StringBuilder_append_String:
never@1080 327 case vmIntrinsics::_StringBuilder_toString:
never@1080 328 case vmIntrinsics::_StringBuffer_void:
never@1080 329 case vmIntrinsics::_StringBuffer_int:
never@1080 330 case vmIntrinsics::_StringBuffer_String:
never@1080 331 case vmIntrinsics::_StringBuffer_append_char:
never@1080 332 case vmIntrinsics::_StringBuffer_append_int:
never@1080 333 case vmIntrinsics::_StringBuffer_append_String:
never@1080 334 case vmIntrinsics::_StringBuffer_toString:
never@1080 335 case vmIntrinsics::_Integer_toString:
never@1080 336 return true;
never@1080 337
never@1080 338 case vmIntrinsics::_String_String:
never@1080 339 {
never@1080 340 Node* receiver = jvms->map()->in(jvms->argoff() + 1);
never@1080 341 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {
never@1080 342 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
never@1080 343 ciMethod* m = csj->method();
never@1080 344 if (m != NULL &&
never@1080 345 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
never@1080 346 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
never@1080 347 // Delay String.<init>(new SB())
never@1080 348 return true;
never@1080 349 }
never@1080 350 return false;
never@1080 351 }
never@1080 352
never@1080 353 default:
never@1080 354 return false;
never@1080 355 }
never@1080 356 }
never@1080 357 return false;
never@1080 358 }
never@1080 359
kvn@4675 360 bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {
kvn@4675 361 if (eliminate_boxing() && call_method->is_boxing_method()) {
kvn@4675 362 set_has_boxed_value(true);
kvn@4675 363 return true;
kvn@4675 364 }
kvn@4675 365 return false;
kvn@4675 366 }
duke@0 367
duke@0 368 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
duke@0 369 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {
duke@0 370 // Additional inputs to consider...
duke@0 371 // bc = bc()
duke@0 372 // caller = method()
duke@0 373 // iter().get_method_holder_index()
duke@0 374 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
duke@0 375 // Interface classes can be loaded & linked and never get around to
duke@0 376 // being initialized. Uncommon-trap for not-initialized static or
duke@0 377 // v-calls. Let interface calls happen.
twisti@1137 378 ciInstanceKlass* holder_klass = dest_method->holder();
never@1565 379 if (!holder_klass->is_being_initialized() &&
never@1565 380 !holder_klass->is_initialized() &&
duke@0 381 !holder_klass->is_interface()) {
duke@0 382 uncommon_trap(Deoptimization::Reason_uninitialized,
duke@0 383 Deoptimization::Action_reinterpret,
duke@0 384 holder_klass);
duke@0 385 return true;
duke@0 386 }
duke@0 387
bharadwaj@3833 388 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
duke@0 389 return false;
duke@0 390 }
duke@0 391
duke@0 392
duke@0 393 //------------------------------do_call----------------------------------------
duke@0 394 // Handle your basic call. Inline if we can & want to, else just setup call.
duke@0 395 void Parse::do_call() {
duke@0 396 // It's likely we are going to add debug info soon.
duke@0 397 // Also, if we inline a guy who eventually needs debug info for this JVMS,
duke@0 398 // our contribution to it is cleaned up right here.
duke@0 399 kill_dead_locals();
duke@0 400
roland@6248 401 C->print_inlining_assert_ready();
roland@6248 402
duke@0 403 // Set frequently used booleans
twisti@3586 404 const bool is_virtual = bc() == Bytecodes::_invokevirtual;
twisti@3586 405 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
twisti@3878 406 const bool has_receiver = Bytecodes::has_receiver(bc());
duke@0 407
duke@0 408 // Find target being called
duke@0 409 bool will_link;
twisti@3586 410 ciSignature* declared_signature = NULL;
twisti@3586 411 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode
twisti@3586 412 ciInstanceKlass* holder_klass = orig_callee->holder();
twisti@3586 413 ciKlass* holder = iter().get_declared_method_holder();
duke@0 414 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
twisti@3586 415 assert(declared_signature != NULL, "cannot be null");
duke@0 416
duke@0 417 // uncommon-trap when callee is unloaded, uninitialized or will not link
duke@0 418 // bailout when too many arguments for register representation
twisti@3586 419 if (!will_link || can_not_compile_call_site(orig_callee, klass)) {
duke@0 420 #ifndef PRODUCT
duke@0 421 if (PrintOpto && (Verbose || WizardMode)) {
duke@0 422 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());
twisti@3586 423 orig_callee->print_name(); tty->cr();
duke@0 424 }
duke@0 425 #endif
duke@0 426 return;
duke@0 427 }
duke@0 428 assert(holder_klass->is_loaded(), "");
twisti@3534 429 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw)
duke@0 430 // Note: this takes into account invokeinterface of methods declared in java/lang/Object,
duke@0 431 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces
duke@0 432 assert(holder_klass->is_interface() || holder_klass->super() == NULL || (bc() != Bytecodes::_invokeinterface), "must match bc");
duke@0 433 // Note: In the absence of miranda methods, an abstract class K can perform
duke@0 434 // an invokevirtual directly on an interface method I.m if K implements I.
duke@0 435
twisti@3878 436 // orig_callee is the resolved callee which's signature includes the
twisti@3878 437 // appendix argument.
twisti@3586 438 const int nargs = orig_callee->arg_size();
twisti@3979 439 const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
twisti@3534 440
twisti@3534 441 // Push appendix argument (MethodType, CallSite, etc.), if one.
twisti@3534 442 if (iter().has_appendix()) {
twisti@3534 443 ciObject* appendix_arg = iter().get_appendix();
twisti@3534 444 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg);
twisti@3534 445 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
twisti@3534 446 push(appendix_arg_node);
twisti@3534 447 }
twisti@3534 448
duke@0 449 // ---------------------
duke@0 450 // Does Class Hierarchy Analysis reveal only a single target of a v-call?
duke@0 451 // Then we may inline or make a static call, but become dependent on there being only 1 target.
duke@0 452 // Does the call-site type profile reveal only one receiver?
duke@0 453 // Then we may introduce a run-time check and inline on the path where it succeeds.
duke@0 454 // The other path may uncommon_trap, check for another receiver, or do a v-call.
duke@0 455
twisti@3979 456 // Try to get the most accurate receiver type
twisti@3979 457 ciMethod* callee = orig_callee;
twisti@3979 458 int vtable_index = Method::invalid_vtable_index;
twisti@3979 459 bool call_does_dispatch = false;
duke@0 460
roland@5556 461 // Speculative type of the receiver if any
roland@5556 462 ciKlass* speculative_receiver_type = NULL;
duke@0 463 if (is_virtual_or_interface) {
roland@5556 464 Node* receiver_node = stack(sp() - nargs);
duke@0 465 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
twisti@3979 466 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
twisti@3979 467 callee = C->optimize_virtual_call(method(), bci(), klass, orig_callee, receiver_type,
twisti@3979 468 is_virtual,
twisti@3979 469 call_does_dispatch, vtable_index); // out-parameters
roland@5556 470 speculative_receiver_type = receiver_type != NULL ? receiver_type->speculative_type() : NULL;
duke@0 471 }
duke@0 472
duke@0 473 // Note: It's OK to try to inline a virtual call.
duke@0 474 // The call generator will not attempt to inline a polymorphic call
duke@0 475 // unless it knows how to optimize the receiver dispatch.
duke@0 476 bool try_inline = (C->do_inlining() || InlineAccessors);
duke@0 477
duke@0 478 // ---------------------
twisti@3534 479 dec_sp(nargs); // Temporarily pop args for JVM state of call
duke@0 480 JVMState* jvms = sync_jvms();
duke@0 481
duke@0 482 // ---------------------
duke@0 483 // Decide call tactic.
duke@0 484 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
duke@0 485 // It decides whether inlining is desirable or not.
roland@5556 486 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
twisti@3534 487
twisti@3586 488 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
twisti@3586 489 orig_callee = callee = NULL;
duke@0 490
duke@0 491 // ---------------------
duke@0 492 // Round double arguments before call
twisti@3534 493 round_double_arguments(cg->method());
duke@0 494
roland@5556 495 // Feed profiling data for arguments to the type system so it can
roland@5556 496 // propagate it as speculative types
roland@5556 497 record_profiled_arguments_for_speculation(cg->method(), bc());
roland@5556 498
duke@0 499 #ifndef PRODUCT
duke@0 500 // bump global counters for calls
twisti@3534 501 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
duke@0 502
duke@0 503 // Record first part of parsing work for this call
duke@0 504 parse_histogram()->record_change();
duke@0 505 #endif // not PRODUCT
duke@0 506
duke@0 507 assert(jvms == this->jvms(), "still operating on the right JVMS");
duke@0 508 assert(jvms_in_sync(), "jvms must carry full info into CG");
duke@0 509
duke@0 510 // save across call, for a subsequent cast_not_null.
duke@0 511 Node* receiver = has_receiver ? argument(0) : NULL;
duke@0 512
roland@5556 513 // The extra CheckCastPP for speculative types mess with PhaseStringOpts
roland@5556 514 if (receiver != NULL && !call_does_dispatch && !cg->is_string_late_inline()) {
roland@5556 515 // Feed profiling data for a single receiver to the type system so
roland@5556 516 // it can propagate it as a speculative type
roland@5556 517 receiver = record_profiled_receiver_for_speculation(receiver);
roland@5556 518 }
roland@5556 519
duke@0 520 // Bump method data counters (We profile *before* the call is made
duke@0 521 // because exceptions don't return to the call site.)
duke@0 522 profile_call(receiver);
duke@0 523
roland@5546 524 JVMState* new_jvms = cg->generate(jvms, this);
twisti@3534 525 if (new_jvms == NULL) {
duke@0 526 // When inlining attempt fails (e.g., too many arguments),
duke@0 527 // it may contaminate the current compile state, making it
duke@0 528 // impossible to pull back and try again. Once we call
duke@0 529 // cg->generate(), we are committed. If it fails, the whole
duke@0 530 // compilation task is compromised.
duke@0 531 if (failing()) return;
never@3196 532
duke@0 533 // This can happen if a library intrinsic is available, but refuses
duke@0 534 // the call site, perhaps because it did not match a pattern the
never@3196 535 // intrinsic was expecting to optimize. Should always be possible to
never@3196 536 // get a normal java call that may inline in that case
roland@5556 537 cg = C->call_generator(cg->method(), vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type, /* allow_intrinsics= */ false);
roland@6248 538 new_jvms = cg->generate(jvms, this);
roland@6248 539 if (new_jvms == NULL) {
duke@0 540 guarantee(failing(), "call failed to generate: calls should work");
duke@0 541 return;
duke@0 542 }
duke@0 543 }
duke@0 544
duke@0 545 if (cg->is_inline()) {
never@67 546 // Accumulate has_loops estimate
twisti@3534 547 C->set_has_loops(C->has_loops() || cg->method()->has_loops());
twisti@3534 548 C->env()->notice_inlined_method(cg->method());
duke@0 549 }
duke@0 550
duke@0 551 // Reset parser state from [new_]jvms, which now carries results of the call.
duke@0 552 // Return value (if any) is already pushed on the stack by the cg.
duke@0 553 add_exception_states_from(new_jvms);
duke@0 554 if (new_jvms->map()->control() == top()) {
duke@0 555 stop_and_kill_map();
duke@0 556 } else {
duke@0 557 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged");
duke@0 558 set_jvms(new_jvms);
duke@0 559 }
duke@0 560
duke@0 561 if (!stopped()) {
duke@0 562 // This was some sort of virtual call, which did a null check for us.
duke@0 563 // Now we can assert receiver-not-null, on the normal return path.
duke@0 564 if (receiver != NULL && cg->is_virtual()) {
duke@0 565 Node* cast = cast_not_null(receiver);
duke@0 566 // %%% assert(receiver == cast, "should already have cast the receiver");
duke@0 567 }
duke@0 568
duke@0 569 // Round double result after a call from strict to non-strict code
twisti@3534 570 round_double_result(cg->method());
twisti@3534 571
twisti@3534 572 ciType* rtype = cg->method()->return_type();
twisti@3979 573 ciType* ctype = declared_signature->return_type();
twisti@3979 574
twisti@3979 575 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
twisti@3534 576 // Be careful here with return types.
twisti@3534 577 if (ctype != rtype) {
twisti@3534 578 BasicType rt = rtype->basic_type();
twisti@3534 579 BasicType ct = ctype->basic_type();
twisti@3534 580 if (ct == T_VOID) {
twisti@3534 581 // It's OK for a method to return a value that is discarded.
twisti@3534 582 // The discarding does not require any special action from the caller.
twisti@3534 583 // The Java code knows this, at VerifyType.isNullConversion.
twisti@3534 584 pop_node(rt); // whatever it was, pop it
twisti@3534 585 } else if (rt == T_INT || is_subword_type(rt)) {
twisti@3979 586 // Nothing. These cases are handled in lambda form bytecode.
twisti@3979 587 assert(ct == T_INT || is_subword_type(ct), err_msg_res("must match: rt=%s, ct=%s", type2name(rt), type2name(ct)));
twisti@3538 588 } else if (rt == T_OBJECT || rt == T_ARRAY) {
twisti@3538 589 assert(ct == T_OBJECT || ct == T_ARRAY, err_msg_res("rt=%s, ct=%s", type2name(rt), type2name(ct)));
twisti@3534 590 if (ctype->is_loaded()) {
twisti@3586 591 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
twisti@3586 592 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
twisti@3586 593 if (arg_type != NULL && !arg_type->higher_equal(sig_type)) {
twisti@3979 594 Node* retnode = pop();
kvn@3680 595 Node* cast_obj = _gvn.transform(new (C) CheckCastPPNode(control(), retnode, sig_type));
twisti@3586 596 push(cast_obj);
twisti@3534 597 }
twisti@3534 598 }
twisti@3534 599 } else {
twisti@3979 600 assert(rt == ct, err_msg_res("unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct)));
twisti@3534 601 // push a zero; it's better than getting an oop/int mismatch
twisti@3979 602 pop_node(rt);
twisti@3979 603 Node* retnode = zerocon(ct);
twisti@3534 604 push_node(ct, retnode);
twisti@3534 605 }
twisti@3534 606 // Now that the value is well-behaved, continue with the call-site type.
twisti@3534 607 rtype = ctype;
twisti@3534 608 }
twisti@3979 609 } else {
twisti@4012 610 // Symbolic resolution enforces the types to be the same.
twisti@4012 611 // NOTE: We must relax the assert for unloaded types because two
twisti@4012 612 // different ciType instances of the same unloaded class type
twisti@4012 613 // can appear to be "loaded" by different loaders (depending on
twisti@4012 614 // the accessing class).
twisti@4012 615 assert(!rtype->is_loaded() || !ctype->is_loaded() || rtype == ctype,
twisti@4012 616 err_msg_res("mismatched return types: rtype=%s, ctype=%s", rtype->name(), ctype->name()));
twisti@3534 617 }
duke@0 618
duke@0 619 // If the return type of the method is not loaded, assert that the
duke@0 620 // value we got is a null. Otherwise, we need to recompile.
twisti@3534 621 if (!rtype->is_loaded()) {
duke@0 622 #ifndef PRODUCT
duke@0 623 if (PrintOpto && (Verbose || WizardMode)) {
duke@0 624 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
twisti@3534 625 cg->method()->print_name(); tty->cr();
duke@0 626 }
duke@0 627 #endif
duke@0 628 if (C->log() != NULL) {
duke@0 629 C->log()->elem("assert_null reason='return' klass='%d'",
twisti@3534 630 C->log()->identify(rtype));
duke@0 631 }
duke@0 632 // If there is going to be a trap, put it at the next bytecode:
duke@0 633 set_bci(iter().next_bci());
twisti@3878 634 null_assert(peek());
duke@0 635 set_bci(iter().cur_bci()); // put it back
duke@0 636 }
roland@5556 637 BasicType ct = ctype->basic_type();
roland@5556 638 if (ct == T_OBJECT || ct == T_ARRAY) {
roland@6216 639 record_profiled_return_for_speculation();
roland@5556 640 }
duke@0 641 }
duke@0 642
duke@0 643 // Restart record of parsing work after possible inlining of call
duke@0 644 #ifndef PRODUCT
duke@0 645 parse_histogram()->set_initial_state(bc());
duke@0 646 #endif
duke@0 647 }
duke@0 648
duke@0 649 //---------------------------catch_call_exceptions-----------------------------
duke@0 650 // Put a Catch and CatchProj nodes behind a just-created call.
duke@0 651 // Send their caught exceptions to the proper handler.
duke@0 652 // This may be used after a call to the rethrow VM stub,
duke@0 653 // when it is needed to process unloaded exception classes.
duke@0 654 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
duke@0 655 // Exceptions are delivered through this channel:
duke@0 656 Node* i_o = this->i_o();
duke@0 657
duke@0 658 // Add a CatchNode.
duke@0 659 GrowableArray<int>* bcis = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, -1);
duke@0 660 GrowableArray<const Type*>* extypes = new (C->node_arena()) GrowableArray<const Type*>(C->node_arena(), 8, 0, NULL);
duke@0 661 GrowableArray<int>* saw_unloaded = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, 0);
duke@0 662
duke@0 663 for (; !handlers.is_done(); handlers.next()) {
duke@0 664 ciExceptionHandler* h = handlers.handler();
duke@0 665 int h_bci = h->handler_bci();
duke@0 666 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
duke@0 667 // Do not introduce unloaded exception types into the graph:
duke@0 668 if (!h_klass->is_loaded()) {
duke@0 669 if (saw_unloaded->contains(h_bci)) {
duke@0 670 /* We've already seen an unloaded exception with h_bci,
duke@0 671 so don't duplicate. Duplication will cause the CatchNode to be
duke@0 672 unnecessarily large. See 4713716. */
duke@0 673 continue;
duke@0 674 } else {
duke@0 675 saw_unloaded->append(h_bci);
duke@0 676 }
duke@0 677 }
duke@0 678 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass);
duke@0 679 // (We use make_from_klass because it respects UseUniqueSubclasses.)
duke@0 680 h_extype = h_extype->join(TypeInstPtr::NOTNULL);
duke@0 681 assert(!h_extype->empty(), "sanity");
duke@0 682 // Note: It's OK if the BCIs repeat themselves.
duke@0 683 bcis->append(h_bci);
duke@0 684 extypes->append(h_extype);
duke@0 685 }
duke@0 686
duke@0 687 int len = bcis->length();
kvn@3680 688 CatchNode *cn = new (C) CatchNode(control(), i_o, len+1);
duke@0 689 Node *catch_ = _gvn.transform(cn);
duke@0 690
duke@0 691 // now branch with the exception state to each of the (potential)
duke@0 692 // handlers
duke@0 693 for(int i=0; i < len; i++) {
duke@0 694 // Setup JVM state to enter the handler.
duke@0 695 PreserveJVMState pjvms(this);
duke@0 696 // Locals are just copied from before the call.
duke@0 697 // Get control from the CatchNode.
duke@0 698 int handler_bci = bcis->at(i);
kvn@3680 699 Node* ctrl = _gvn.transform( new (C) CatchProjNode(catch_, i+1,handler_bci));
duke@0 700 // This handler cannot happen?
duke@0 701 if (ctrl == top()) continue;
duke@0 702 set_control(ctrl);
duke@0 703
duke@0 704 // Create exception oop
duke@0 705 const TypeInstPtr* extype = extypes->at(i)->is_instptr();
kvn@3680 706 Node *ex_oop = _gvn.transform(new (C) CreateExNode(extypes->at(i), ctrl, i_o));
duke@0 707
duke@0 708 // Handle unloaded exception classes.
duke@0 709 if (saw_unloaded->contains(handler_bci)) {
duke@0 710 // An unloaded exception type is coming here. Do an uncommon trap.
duke@0 711 #ifndef PRODUCT
duke@0 712 // We do not expect the same handler bci to take both cold unloaded
duke@0 713 // and hot loaded exceptions. But, watch for it.
twisti@3535 714 if ((Verbose || WizardMode) && extype->is_loaded()) {
twisti@3535 715 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci());
duke@0 716 method()->print_name(); tty->cr();
duke@0 717 } else if (PrintOpto && (Verbose || WizardMode)) {
duke@0 718 tty->print("Bailing out on unloaded exception type ");
duke@0 719 extype->klass()->print_name();
duke@0 720 tty->print(" at bci:%d in ", bci());
duke@0 721 method()->print_name(); tty->cr();
duke@0 722 }
duke@0 723 #endif
duke@0 724 // Emit an uncommon trap instead of processing the block.
duke@0 725 set_bci(handler_bci);
duke@0 726 push_ex_oop(ex_oop);
duke@0 727 uncommon_trap(Deoptimization::Reason_unloaded,
duke@0 728 Deoptimization::Action_reinterpret,
duke@0 729 extype->klass(), "!loaded exception");
duke@0 730 set_bci(iter().cur_bci()); // put it back
duke@0 731 continue;
duke@0 732 }
duke@0 733
duke@0 734 // go to the exception handler
duke@0 735 if (handler_bci < 0) { // merge with corresponding rethrow node
duke@0 736 throw_to_exit(make_exception_state(ex_oop));
duke@0 737 } else { // Else jump to corresponding handle
duke@0 738 push_ex_oop(ex_oop); // Clear stack and push just the oop.
duke@0 739 merge_exception(handler_bci);
duke@0 740 }
duke@0 741 }
duke@0 742
duke@0 743 // The first CatchProj is for the normal return.
duke@0 744 // (Note: If this is a call to rethrow_Java, this node goes dead.)
kvn@3680 745 set_control(_gvn.transform( new (C) CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
duke@0 746 }
duke@0 747
duke@0 748
duke@0 749 //----------------------------catch_inline_exceptions--------------------------
duke@0 750 // Handle all exceptions thrown by an inlined method or individual bytecode.
duke@0 751 // Common case 1: we have no handler, so all exceptions merge right into
duke@0 752 // the rethrow case.
duke@0 753 // Case 2: we have some handlers, with loaded exception klasses that have
duke@0 754 // no subklasses. We do a Deutsch-Shiffman style type-check on the incoming
duke@0 755 // exception oop and branch to the handler directly.
duke@0 756 // Case 3: We have some handlers with subklasses or are not loaded at
duke@0 757 // compile-time. We have to call the runtime to resolve the exception.
duke@0 758 // So we insert a RethrowCall and all the logic that goes with it.
duke@0 759 void Parse::catch_inline_exceptions(SafePointNode* ex_map) {
duke@0 760 // Caller is responsible for saving away the map for normal control flow!
duke@0 761 assert(stopped(), "call set_map(NULL) first");
duke@0 762 assert(method()->has_exception_handlers(), "don't come here w/o work to do");
duke@0 763
duke@0 764 Node* ex_node = saved_ex_oop(ex_map);
duke@0 765 if (ex_node == top()) {
duke@0 766 // No action needed.
duke@0 767 return;
duke@0 768 }
duke@0 769 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr();
duke@0 770 NOT_PRODUCT(if (ex_type==NULL) tty->print_cr("*** Exception not InstPtr"));
duke@0 771 if (ex_type == NULL)
duke@0 772 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
duke@0 773
duke@0 774 // determine potential exception handlers
duke@0 775 ciExceptionHandlerStream handlers(method(), bci(),
duke@0 776 ex_type->klass()->as_instance_klass(),
duke@0 777 ex_type->klass_is_exact());
duke@0 778
duke@0 779 // Start executing from the given throw state. (Keep its stack, for now.)
duke@0 780 // Get the exception oop as known at compile time.
duke@0 781 ex_node = use_exception_state(ex_map);
duke@0 782
duke@0 783 // Get the exception oop klass from its header
duke@0 784 Node* ex_klass_node = NULL;
duke@0 785 if (has_ex_handler() && !ex_type->klass_is_exact()) {
duke@0 786 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
kvn@164 787 ex_klass_node = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) );
duke@0 788
duke@0 789 // Compute the exception klass a little more cleverly.
duke@0 790 // Obvious solution is to simple do a LoadKlass from the 'ex_node'.
duke@0 791 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
duke@0 792 // each arm of the Phi. If I know something clever about the exceptions
duke@0 793 // I'm loading the class from, I can replace the LoadKlass with the
duke@0 794 // klass constant for the exception oop.
duke@0 795 if( ex_node->is_Phi() ) {
kvn@3680 796 ex_klass_node = new (C) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT );
duke@0 797 for( uint i = 1; i < ex_node->req(); i++ ) {
duke@0 798 Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() );
kvn@164 799 Node* k = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) );
duke@0 800 ex_klass_node->init_req( i, k );
duke@0 801 }
duke@0 802 _gvn.set_type(ex_klass_node, TypeKlassPtr::OBJECT);
duke@0 803
duke@0 804 }
duke@0 805 }
duke@0 806
duke@0 807 // Scan the exception table for applicable handlers.
duke@0 808 // If none, we can call rethrow() and be done!
duke@0 809 // If precise (loaded with no subklasses), insert a D.S. style
duke@0 810 // pointer compare to the correct handler and loop back.
duke@0 811 // If imprecise, switch to the Rethrow VM-call style handling.
duke@0 812
duke@0 813 int remaining = handlers.count_remaining();
duke@0 814
duke@0 815 // iterate through all entries sequentially
duke@0 816 for (;!handlers.is_done(); handlers.next()) {
duke@0 817 ciExceptionHandler* handler = handlers.handler();
duke@0 818
duke@0 819 if (handler->is_rethrow()) {
duke@0 820 // If we fell off the end of the table without finding an imprecise
duke@0 821 // exception klass (and without finding a generic handler) then we
duke@0 822 // know this exception is not handled in this method. We just rethrow
duke@0 823 // the exception into the caller.
duke@0 824 throw_to_exit(make_exception_state(ex_node));
duke@0 825 return;
duke@0 826 }
duke@0 827
duke@0 828 // exception handler bci range covers throw_bci => investigate further
duke@0 829 int handler_bci = handler->handler_bci();
duke@0 830
duke@0 831 if (remaining == 1) {
duke@0 832 push_ex_oop(ex_node); // Push exception oop for handler
duke@0 833 #ifndef PRODUCT
duke@0 834 if (PrintOpto && WizardMode) {
duke@0 835 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci);
duke@0 836 }
duke@0 837 #endif
duke@0 838 merge_exception(handler_bci); // jump to handler
duke@0 839 return; // No more handling to be done here!
duke@0 840 }
duke@0 841
never@1344 842 // Get the handler's klass
never@1344 843 ciInstanceKlass* klass = handler->catch_klass();
duke@0 844
never@1344 845 if (!klass->is_loaded()) { // klass is not loaded?
never@1344 846 // fall through into catch_call_exceptions which will emit a
never@1344 847 // handler with an uncommon trap.
never@1344 848 break;
duke@0 849 }
duke@0 850
duke@0 851 if (klass->is_interface()) // should not happen, but...
duke@0 852 break; // bail out
duke@0 853
never@1344 854 // Check the type of the exception against the catch type
duke@0 855 const TypeKlassPtr *tk = TypeKlassPtr::make(klass);
duke@0 856 Node* con = _gvn.makecon(tk);
never@1344 857 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con);
never@1344 858 if (!stopped()) {
never@1344 859 PreserveJVMState pjvms(this);
never@1344 860 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr();
never@1344 861 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness");
kvn@3680 862 Node* ex_oop = _gvn.transform(new (C) CheckCastPPNode(control(), ex_node, tinst));
duke@0 863 push_ex_oop(ex_oop); // Push exception oop for handler
duke@0 864 #ifndef PRODUCT
duke@0 865 if (PrintOpto && WizardMode) {
duke@0 866 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci);
duke@0 867 klass->print_name();
duke@0 868 tty->cr();
duke@0 869 }
duke@0 870 #endif
duke@0 871 merge_exception(handler_bci);
duke@0 872 }
never@1344 873 set_control(not_subtype_ctrl);
duke@0 874
duke@0 875 // Come here if exception does not match handler.
duke@0 876 // Carry on with more handler checks.
duke@0 877 --remaining;
duke@0 878 }
duke@0 879
duke@0 880 assert(!stopped(), "you should return if you finish the chain");
duke@0 881
duke@0 882 // Oops, need to call into the VM to resolve the klasses at runtime.
duke@0 883 // Note: This call must not deoptimize, since it is not a real at this bci!
duke@0 884 kill_dead_locals();
duke@0 885
duke@0 886 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW,
duke@0 887 OptoRuntime::rethrow_Type(),
duke@0 888 OptoRuntime::rethrow_stub(),
duke@0 889 NULL, NULL,
duke@0 890 ex_node);
duke@0 891
duke@0 892 // Rethrow is a pure call, no side effects, only a result.
duke@0 893 // The result cannot be allocated, so we use I_O
duke@0 894
duke@0 895 // Catch exceptions from the rethrow
duke@0 896 catch_call_exceptions(handlers);
duke@0 897 }
duke@0 898
duke@0 899
duke@0 900 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.)
duke@0 901
duke@0 902
duke@0 903 #ifndef PRODUCT
duke@0 904 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) {
duke@0 905 if( CountCompiledCalls ) {
duke@0 906 if( at_method_entry ) {
duke@0 907 // bump invocation counter if top method (for statistics)
duke@0 908 if (CountCompiledCalls && depth() == 1) {
coleenp@3602 909 const TypePtr* addr_type = TypeMetadataPtr::make(method());
duke@0 910 Node* adr1 = makecon(addr_type);
coleenp@3602 911 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset()));
duke@0 912 increment_counter(adr2);
duke@0 913 }
duke@0 914 } else if (is_inline) {
duke@0 915 switch (bc()) {
duke@0 916 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break;
duke@0 917 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break;
duke@0 918 case Bytecodes::_invokestatic:
jrose@726 919 case Bytecodes::_invokedynamic:
duke@0 920 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break;
duke@0 921 default: fatal("unexpected call bytecode");
duke@0 922 }
duke@0 923 } else {
duke@0 924 switch (bc()) {
duke@0 925 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break;
duke@0 926 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break;
duke@0 927 case Bytecodes::_invokestatic:
jrose@726 928 case Bytecodes::_invokedynamic:
duke@0 929 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break;
duke@0 930 default: fatal("unexpected call bytecode");
duke@0 931 }
duke@0 932 }
duke@0 933 }
duke@0 934 }
duke@0 935 #endif //PRODUCT
duke@0 936
duke@0 937
twisti@3979 938 ciMethod* Compile::optimize_virtual_call(ciMethod* caller, int bci, ciInstanceKlass* klass,
twisti@3979 939 ciMethod* callee, const TypeOopPtr* receiver_type,
twisti@3979 940 bool is_virtual,
twisti@3979 941 bool& call_does_dispatch, int& vtable_index) {
twisti@3979 942 // Set default values for out-parameters.
twisti@3979 943 call_does_dispatch = true;
twisti@3979 944 vtable_index = Method::invalid_vtable_index;
twisti@3979 945
twisti@3979 946 // Choose call strategy.
twisti@3979 947 ciMethod* optimized_virtual_method = optimize_inlining(caller, bci, klass, callee, receiver_type);
twisti@3979 948
twisti@3979 949 // Have the call been sufficiently improved such that it is no longer a virtual?
twisti@3979 950 if (optimized_virtual_method != NULL) {
twisti@3979 951 callee = optimized_virtual_method;
twisti@3979 952 call_does_dispatch = false;
twisti@3979 953 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) {
twisti@3979 954 // We can make a vtable call at this site
twisti@3979 955 vtable_index = callee->resolve_vtable_index(caller->holder(), klass);
twisti@3979 956 }
twisti@3979 957 return callee;
twisti@3979 958 }
twisti@3979 959
duke@0 960 // Identify possible target method and inlining style
twisti@3979 961 ciMethod* Compile::optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass,
twisti@3979 962 ciMethod* callee, const TypeOopPtr* receiver_type) {
duke@0 963 // only use for virtual or interface calls
duke@0 964
duke@0 965 // If it is obviously final, do not bother to call find_monomorphic_target,
duke@0 966 // because the class hierarchy checks are not needed, and may fail due to
duke@0 967 // incompletely loaded classes. Since we do our own class loading checks
duke@0 968 // in this module, we may confidently bind to any method.
twisti@3979 969 if (callee->can_be_statically_bound()) {
twisti@3979 970 return callee;
duke@0 971 }
duke@0 972
duke@0 973 // Attempt to improve the receiver
duke@0 974 bool actual_receiver_is_exact = false;
duke@0 975 ciInstanceKlass* actual_receiver = klass;
duke@0 976 if (receiver_type != NULL) {
duke@0 977 // Array methods are all inherited from Object, and are monomorphic.
duke@0 978 if (receiver_type->isa_aryptr() &&
twisti@3979 979 callee->holder() == env()->Object_klass()) {
twisti@3979 980 return callee;
duke@0 981 }
duke@0 982
duke@0 983 // All other interesting cases are instance klasses.
duke@0 984 if (!receiver_type->isa_instptr()) {
duke@0 985 return NULL;
duke@0 986 }
duke@0 987
duke@0 988 ciInstanceKlass *ikl = receiver_type->klass()->as_instance_klass();
duke@0 989 if (ikl->is_loaded() && ikl->is_initialized() && !ikl->is_interface() &&
never@367 990 (ikl == actual_receiver || ikl->is_subtype_of(actual_receiver))) {
duke@0 991 // ikl is a same or better type than the original actual_receiver,
duke@0 992 // e.g. static receiver from bytecodes.
duke@0 993 actual_receiver = ikl;
duke@0 994 // Is the actual_receiver exact?
duke@0 995 actual_receiver_is_exact = receiver_type->klass_is_exact();
duke@0 996 }
duke@0 997 }
duke@0 998
duke@0 999 ciInstanceKlass* calling_klass = caller->holder();
twisti@3979 1000 ciMethod* cha_monomorphic_target = callee->find_monomorphic_target(calling_klass, klass, actual_receiver);
duke@0 1001 if (cha_monomorphic_target != NULL) {
duke@0 1002 assert(!cha_monomorphic_target->is_abstract(), "");
duke@0 1003 // Look at the method-receiver type. Does it add "too much information"?
duke@0 1004 ciKlass* mr_klass = cha_monomorphic_target->holder();
duke@0 1005 const Type* mr_type = TypeInstPtr::make(TypePtr::BotPTR, mr_klass);
duke@0 1006 if (receiver_type == NULL || !receiver_type->higher_equal(mr_type)) {
duke@0 1007 // Calling this method would include an implicit cast to its holder.
duke@0 1008 // %%% Not yet implemented. Would throw minor asserts at present.
duke@0 1009 // %%% The most common wins are already gained by +UseUniqueSubclasses.
duke@0 1010 // To fix, put the higher_equal check at the call of this routine,
duke@0 1011 // and add a CheckCastPP to the receiver.
duke@0 1012 if (TraceDependencies) {
duke@0 1013 tty->print_cr("found unique CHA method, but could not cast up");
duke@0 1014 tty->print(" method = ");
duke@0 1015 cha_monomorphic_target->print();
duke@0 1016 tty->cr();
duke@0 1017 }
twisti@3979 1018 if (log() != NULL) {
twisti@3979 1019 log()->elem("missed_CHA_opportunity klass='%d' method='%d'",
twisti@3979 1020 log()->identify(klass),
twisti@3979 1021 log()->identify(cha_monomorphic_target));
duke@0 1022 }
duke@0 1023 cha_monomorphic_target = NULL;
duke@0 1024 }
duke@0 1025 }
duke@0 1026 if (cha_monomorphic_target != NULL) {
duke@0 1027 // Hardwiring a virtual.
duke@0 1028 // If we inlined because CHA revealed only a single target method,
duke@0 1029 // then we are dependent on that target method not getting overridden
duke@0 1030 // by dynamic class loading. Be sure to test the "static" receiver
duke@0 1031 // dest_method here, as opposed to the actual receiver, which may
duke@0 1032 // falsely lead us to believe that the receiver is final or private.
twisti@3979 1033 dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target);
duke@0 1034 return cha_monomorphic_target;
duke@0 1035 }
duke@0 1036
duke@0 1037 // If the type is exact, we can still bind the method w/o a vcall.
duke@0 1038 // (This case comes after CHA so we can see how much extra work it does.)
duke@0 1039 if (actual_receiver_is_exact) {
duke@0 1040 // In case of evolution, there is a dependence on every inlined method, since each
duke@0 1041 // such method can be changed when its class is redefined.
twisti@3979 1042 ciMethod* exact_method = callee->resolve_invoke(calling_klass, actual_receiver);
duke@0 1043 if (exact_method != NULL) {
duke@0 1044 #ifndef PRODUCT
duke@0 1045 if (PrintOpto) {
duke@0 1046 tty->print(" Calling method via exact type @%d --- ", bci);
duke@0 1047 exact_method->print_name();
duke@0 1048 tty->cr();
duke@0 1049 }
duke@0 1050 #endif
duke@0 1051 return exact_method;
duke@0 1052 }
duke@0 1053 }
duke@0 1054
duke@0 1055 return NULL;
duke@0 1056 }