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* Copyright (c) 1998, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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#include "precompiled.hpp"
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#include "ci/ciCallSite.hpp"
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#include "ci/ciMethodHandle.hpp"
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#include "ci/ciSymbols.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "compiler/compileBroker.hpp"
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#include "compiler/compileLog.hpp"
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#include "interpreter/linkResolver.hpp"
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#include "logging/log.hpp"
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#include "logging/logLevel.hpp"
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#include "logging/logMessage.hpp"
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#include "logging/logStream.hpp"
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#include "opto/addnode.hpp"
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#include "opto/callGenerator.hpp"
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#include "opto/castnode.hpp"
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#include "opto/cfgnode.hpp"
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#include "opto/mulnode.hpp"
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#include "opto/parse.hpp"
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#include "opto/rootnode.hpp"
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#include "opto/runtime.hpp"
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#include "opto/subnode.hpp"
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#include "prims/methodHandles.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "utilities/macros.hpp"
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static void print_trace_type_profile(outputStream* out, int depth, ciKlass* prof_klass, int site_count, int receiver_count) {54
CompileTask::print_inline_indent(depth, out);
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out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);56
prof_klass->name()->print_symbol_on(out);
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static void trace_type_profile(Compile* C, ciMethod* method, int depth, int bci, ciMethod* prof_method,
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ciKlass* prof_klass, int site_count, int receiver_count) {62
if (TraceTypeProfile || C->print_inlining()) {63
outputStream* out = tty;
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if (!C->print_inlining()) {65
if (!PrintOpto && !PrintCompilation) {66
method->print_short_name();
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CompileTask::print_inlining_tty(prof_method, depth, bci, InliningResult::SUCCESS);
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out = C->print_inlining_stream();
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print_trace_type_profile(out, depth, prof_klass, site_count, receiver_count);
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LogTarget(Debug, jit, inlining) lt;
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if (lt.is_enabled()) {79
print_trace_type_profile(&ls, depth, prof_klass, site_count, receiver_count);
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CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
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JVMState* jvms, bool allow_inline,
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float prof_factor, ciKlass* speculative_receiver_type,
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bool allow_intrinsics) {87
assert(callee != nullptr, "failed method resolution");
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ciMethod* caller = jvms->method();
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int bci = jvms->bci();
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Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
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ciMethod* orig_callee = caller->get_method_at_bci(bci);
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const bool is_virtual_or_interface = (bytecode == Bytecodes::_invokevirtual) ||
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(bytecode == Bytecodes::_invokeinterface) ||
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(orig_callee->intrinsic_id() == vmIntrinsics::_linkToVirtual) ||
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(orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface);
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// Dtrace currently doesn't work unless all calls are vanilla
100
if (env()->dtrace_method_probes()) {101
allow_inline = false;
104
// Note: When we get profiling during stage-1 compiles, we want to pull
105
// from more specific profile data which pertains to this inlining.
106
// Right now, ignore the information in jvms->caller(), and do method[bci].
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ciCallProfile profile = caller->call_profile_at_bci(bci);
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// See how many times this site has been invoked.
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int site_count = profile.count();
111
int receiver_count = -1;
112
if (call_does_dispatch && UseTypeProfile && profile.has_receiver(0)) {113
// Receivers in the profile structure are ordered by call counts
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// so that the most called (major) receiver is profile.receiver(0).
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receiver_count = profile.receiver_count(0);
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CompileLog* log = this->log();
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if (log != nullptr) {120
int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1;
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int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1;
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log->begin_elem("call method='%d' count='%d' prof_factor='%f'",123
log->identify(callee), site_count, prof_factor);
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if (call_does_dispatch) log->print(" virtual='1'");125
if (allow_inline) log->print(" inline='1'");126
if (receiver_count >= 0) {127
log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count);128
if (profile.has_receiver(1)) {129
log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1));132
if (callee->is_method_handle_intrinsic()) {133
log->print(" method_handle_intrinsic='1'");138
// Special case the handling of certain common, profitable library
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// methods. If these methods are replaced with specialized code,
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// then we return it as the inlined version of the call.
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CallGenerator* cg_intrinsic = nullptr;
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if (allow_inline && allow_intrinsics) {143
CallGenerator* cg = find_intrinsic(callee, call_does_dispatch);
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if (cg->is_predicated()) {146
// Code without intrinsic but, hopefully, inlined.
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CallGenerator* inline_cg = this->call_generator(callee,
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vtable_index, call_does_dispatch, jvms, allow_inline, prof_factor, speculative_receiver_type, false);
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if (inline_cg != nullptr) {150
cg = CallGenerator::for_predicated_intrinsic(cg, inline_cg);
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// If intrinsic does the virtual dispatch, we try to use the type profile
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// first, and hopefully inline it as the regular virtual call below.
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// We will retry the intrinsic if nothing had claimed it afterwards.
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if (cg->does_virtual_dispatch()) {160
} else if (IncrementalInline && should_delay_vector_inlining(callee, jvms)) {161
return CallGenerator::for_late_inline(callee, cg);
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// Do method handle calls.
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// NOTE: This must happen before normal inlining logic below since
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// MethodHandle.invoke* are native methods which obviously don't
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// have bytecodes and so normal inlining fails.
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if (callee->is_method_handle_intrinsic()) {173
CallGenerator* cg = CallGenerator::for_method_handle_call(jvms, caller, callee, allow_inline);
177
// Attempt to inline...
179
// The profile data is only partly attributable to this caller,
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// scale back the call site information.
181
float past_uses = jvms->method()->scale_count(site_count, prof_factor);
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// This is the number of times we expect the call code to be used.
183
float expected_uses = past_uses;
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// Try inlining a bytecoded method:
186
if (!call_does_dispatch) {187
InlineTree* ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method());
188
bool should_delay = C->should_delay_inlining();
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if (ilt->ok_to_inline(callee, jvms, profile, should_delay)) {190
CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses);
191
// For optimized virtual calls assert at runtime that receiver object
192
// is a subtype of the inlined method holder. CHA can report a method
193
// as a unique target under an abstract method, but receiver type
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// sometimes has a broader type. Similar scenario is possible with
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// default methods when type system loses information about implemented
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if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {198
CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
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Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
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cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
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// Delay the inlining of this method to give us the
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// opportunity to perform some high level optimizations
208
return CallGenerator::for_late_inline(callee, cg);
209
} else if (should_delay_string_inlining(callee, jvms)) {210
return CallGenerator::for_string_late_inline(callee, cg);
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} else if (should_delay_boxing_inlining(callee, jvms)) {212
return CallGenerator::for_boxing_late_inline(callee, cg);
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} else if (should_delay_vector_reboxing_inlining(callee, jvms)) {214
return CallGenerator::for_vector_reboxing_late_inline(callee, cg);
222
// Try using the type profile.
223
if (call_does_dispatch && site_count > 0 && UseTypeProfile) {224
// The major receiver's count >= TypeProfileMajorReceiverPercent of site_count.
225
bool have_major_receiver = profile.has_receiver(0) && (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent);
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ciMethod* receiver_method = nullptr;
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int morphism = profile.morphism();
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if (speculative_receiver_type != nullptr) {230
if (!too_many_traps_or_recompiles(caller, bci, Deoptimization::Reason_speculate_class_check)) {231
// We have a speculative type, we should be able to resolve
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// the call. We do that before looking at the profiling at
233
// this invoke because it may lead to bimorphic inlining which
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// a speculative type should help us avoid.
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receiver_method = callee->resolve_invoke(jvms->method()->holder(),
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speculative_receiver_type);
237
if (receiver_method == nullptr) {238
speculative_receiver_type = nullptr;
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// speculation failed before. Use profiling at the call
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// (could allow bimorphic inlining for instance).
245
speculative_receiver_type = nullptr;
248
if (receiver_method == nullptr &&
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(have_major_receiver || morphism == 1 ||
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(morphism == 2 && UseBimorphicInlining))) {251
// receiver_method = profile.method();
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// Profiles do not suggest methods now. Look it up in the major receiver.
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receiver_method = callee->resolve_invoke(jvms->method()->holder(),
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profile.receiver(0));
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if (receiver_method != nullptr) {257
// The single majority receiver sufficiently outweighs the minority.
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CallGenerator* hit_cg = this->call_generator(receiver_method,
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vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
260
if (hit_cg != nullptr) {261
// Look up second receiver.
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CallGenerator* next_hit_cg = nullptr;
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ciMethod* next_receiver_method = nullptr;
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if (morphism == 2 && UseBimorphicInlining) {265
next_receiver_method = callee->resolve_invoke(jvms->method()->holder(),
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profile.receiver(1));
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if (next_receiver_method != nullptr) {268
next_hit_cg = this->call_generator(next_receiver_method,
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vtable_index, !call_does_dispatch, jvms,
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allow_inline, prof_factor);
271
if (next_hit_cg != nullptr && !next_hit_cg->is_inline() &&
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have_major_receiver && UseOnlyInlinedBimorphic) {273
// Skip if we can't inline second receiver's method
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next_hit_cg = nullptr;
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CallGenerator* miss_cg;
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Deoptimization::DeoptReason reason = (morphism == 2
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? Deoptimization::Reason_bimorphic
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: Deoptimization::reason_class_check(speculative_receiver_type != nullptr));
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if ((morphism == 1 || (morphism == 2 && next_hit_cg != nullptr)) &&
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!too_many_traps_or_recompiles(caller, bci, reason)
285
// Generate uncommon trap for class check failure path
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// in case of monomorphic or bimorphic virtual call site.
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miss_cg = CallGenerator::for_uncommon_trap(callee, reason,
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Deoptimization::Action_maybe_recompile);
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// Generate virtual call for class check failure path
291
// in case of polymorphic virtual call site.
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miss_cg = (IncrementalInlineVirtual ? CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor)
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: CallGenerator::for_virtual_call(callee, vtable_index));
295
if (miss_cg != nullptr) {296
if (next_hit_cg != nullptr) {297
assert(speculative_receiver_type == nullptr, "shouldn't end up here if we used speculation");
298
trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1));
299
// We don't need to record dependency on a receiver here and below.
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// Whenever we inline, the dependency is added by Parse::Parse().
301
miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX);
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if (miss_cg != nullptr) {304
ciKlass* k = speculative_receiver_type != nullptr ? speculative_receiver_type : profile.receiver(0);
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trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), receiver_method, k, site_count, receiver_count);
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float hit_prob = speculative_receiver_type != nullptr ? 1.0 : profile.receiver_prob(0);
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CallGenerator* cg = CallGenerator::for_predicted_call(k, miss_cg, hit_cg, hit_prob);
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if (cg != nullptr) return cg;
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// If there is only one implementor of this interface then we
316
// may be able to bind this invoke directly to the implementing
317
// klass but we need both a dependence on the single interface
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// and on the method we bind to. Additionally since all we know
319
// about the receiver type is that it's supposed to implement the
320
// interface we have to insert a check that it's the class we
321
// expect. Interface types are not checked by the verifier so
322
// they are roughly equivalent to Object.
323
// The number of implementors for declared_interface is less or
324
// equal to the number of implementors for target->holder() so
325
// if number of implementors of target->holder() == 1 then
326
// number of implementors for decl_interface is 0 or 1. If
327
// it's 0 then no class implements decl_interface and there's
328
// no point in inlining.
329
if (call_does_dispatch && bytecode == Bytecodes::_invokeinterface) {330
ciInstanceKlass* declared_interface =
331
caller->get_declared_method_holder_at_bci(bci)->as_instance_klass();
332
ciInstanceKlass* singleton = declared_interface->unique_implementor();
334
if (singleton != nullptr) {335
assert(singleton != declared_interface, "not a unique implementor");
337
ciMethod* cha_monomorphic_target =
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callee->find_monomorphic_target(caller->holder(), declared_interface, singleton);
340
if (cha_monomorphic_target != nullptr &&
341
cha_monomorphic_target->holder() != env()->Object_klass()) { // subtype check against Object is useless342
ciKlass* holder = cha_monomorphic_target->holder();
344
// Try to inline the method found by CHA. Inlined method is guarded by the type check.
345
CallGenerator* hit_cg = call_generator(cha_monomorphic_target,
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vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
348
// Deoptimize on type check fail. The interpreter will throw ICCE for us.
349
CallGenerator* miss_cg = CallGenerator::for_uncommon_trap(callee,
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Deoptimization::Reason_class_check, Deoptimization::Action_none);
352
ciKlass* constraint = (holder->is_subclass_of(singleton) ? holder : singleton); // avoid upcasts
353
CallGenerator* cg = CallGenerator::for_guarded_call(constraint, miss_cg, hit_cg);
354
if (hit_cg != nullptr && cg != nullptr) {355
dependencies()->assert_unique_implementor(declared_interface, singleton);
356
dependencies()->assert_unique_concrete_method(declared_interface, cha_monomorphic_target, declared_interface, callee);
361
} // call_does_dispatch && bytecode == Bytecodes::_invokeinterface
363
// Nothing claimed the intrinsic, we go with straight-forward inlining
364
// for already discovered intrinsic.
365
if (allow_intrinsics && cg_intrinsic != nullptr) {366
assert(cg_intrinsic->does_virtual_dispatch(), "sanity");
371
// There was no special inlining tactic, or it bailed out.
372
// Use a more generic tactic, like a simple call.
373
if (call_does_dispatch) {374
const char* msg = "virtual call";
375
if (C->print_inlining()) {376
print_inlining(callee, jvms->depth() - 1, jvms->bci(), InliningResult::FAILURE, msg);
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C->log_inline_failure(msg);
379
if (IncrementalInlineVirtual && allow_inline) {380
return CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor); // attempt to inline through virtual call later
382
return CallGenerator::for_virtual_call(callee, vtable_index);
385
// Class Hierarchy Analysis or Type Profile reveals a unique target, or it is a static or special call.
386
CallGenerator* cg = CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms));
387
// For optimized virtual calls assert at runtime that receiver object
388
// is a subtype of the method holder.
389
if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {390
CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
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Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
392
cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
398
// Return true for methods that shouldn't be inlined early so that
399
// they are easier to analyze and optimize as intrinsics.
400
bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {401
if (has_stringbuilder()) {403
if ((call_method->holder() == C->env()->StringBuilder_klass() ||
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call_method->holder() == C->env()->StringBuffer_klass()) &&
405
(jvms->method()->holder() == C->env()->StringBuilder_klass() ||
406
jvms->method()->holder() == C->env()->StringBuffer_klass())) {407
// Delay SB calls only when called from non-SB code
411
switch (call_method->intrinsic_id()) {412
case vmIntrinsics::_StringBuilder_void:
413
case vmIntrinsics::_StringBuilder_int:
414
case vmIntrinsics::_StringBuilder_String:
415
case vmIntrinsics::_StringBuilder_append_char:
416
case vmIntrinsics::_StringBuilder_append_int:
417
case vmIntrinsics::_StringBuilder_append_String:
418
case vmIntrinsics::_StringBuilder_toString:
419
case vmIntrinsics::_StringBuffer_void:
420
case vmIntrinsics::_StringBuffer_int:
421
case vmIntrinsics::_StringBuffer_String:
422
case vmIntrinsics::_StringBuffer_append_char:
423
case vmIntrinsics::_StringBuffer_append_int:
424
case vmIntrinsics::_StringBuffer_append_String:
425
case vmIntrinsics::_StringBuffer_toString:
426
case vmIntrinsics::_Integer_toString:
429
case vmIntrinsics::_String_String:
431
Node* receiver = jvms->map()->in(jvms->argoff() + 1);
432
if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {433
CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
434
ciMethod* m = csj->method();
436
(m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
437
m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
438
// Delay String.<init>(new SB())
451
bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {452
if (eliminate_boxing() && call_method->is_boxing_method()) {453
set_has_boxed_value(true);
454
return aggressive_unboxing();
459
bool Compile::should_delay_vector_inlining(ciMethod* call_method, JVMState* jvms) {460
return EnableVectorSupport && call_method->is_vector_method();
463
bool Compile::should_delay_vector_reboxing_inlining(ciMethod* call_method, JVMState* jvms) {464
return EnableVectorSupport && (call_method->intrinsic_id() == vmIntrinsics::_VectorRebox);
467
// uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
468
bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {469
// Additional inputs to consider...
472
// iter().get_method_holder_index()
473
assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
474
// Interface classes can be loaded & linked and never get around to
475
// being initialized. Uncommon-trap for not-initialized static or
476
// v-calls. Let interface calls happen.
477
ciInstanceKlass* holder_klass = dest_method->holder();
478
if (!holder_klass->is_being_initialized() &&
479
!holder_klass->is_initialized() &&
480
!holder_klass->is_interface()) {481
uncommon_trap(Deoptimization::Reason_uninitialized,
482
Deoptimization::Action_reinterpret,
487
assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
492
static bool check_call_consistency(JVMState* jvms, CallGenerator* cg) {493
ciMethod* symbolic_info = jvms->method()->get_method_at_bci(jvms->bci());
494
ciMethod* resolved_method = cg->method();
495
if (!ciMethod::is_consistent_info(symbolic_info, resolved_method)) {496
tty->print_cr("JVMS:");498
tty->print_cr("Bytecode info:");499
jvms->method()->get_method_at_bci(jvms->bci())->print(); tty->cr();
500
tty->print_cr("Resolved method:");501
cg->method()->print(); tty->cr();
508
//------------------------------do_call----------------------------------------
509
// Handle your basic call. Inline if we can & want to, else just setup call.
510
void Parse::do_call() {511
// It's likely we are going to add debug info soon.
512
// Also, if we inline a guy who eventually needs debug info for this JVMS,
513
// our contribution to it is cleaned up right here.
516
C->print_inlining_assert_ready();
518
// Set frequently used booleans
519
const bool is_virtual = bc() == Bytecodes::_invokevirtual;
520
const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
521
const bool has_receiver = Bytecodes::has_receiver(bc());
523
// Find target being called
525
ciSignature* declared_signature = nullptr;
526
ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode
527
ciInstanceKlass* holder_klass = orig_callee->holder();
528
ciKlass* holder = iter().get_declared_method_holder();
529
ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
530
assert(declared_signature != nullptr, "cannot be null");
531
JFR_ONLY(Jfr::on_resolution(this, holder, orig_callee);)
533
// Bump max node limit for JSR292 users
534
if (bc() == Bytecodes::_invokedynamic || orig_callee->is_method_handle_intrinsic()) {535
C->set_max_node_limit(3*MaxNodeLimit);
538
// uncommon-trap when callee is unloaded, uninitialized or will not link
539
// bailout when too many arguments for register representation
540
if (!will_link || can_not_compile_call_site(orig_callee, klass)) {541
if (PrintOpto && (Verbose || WizardMode)) {542
method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());543
orig_callee->print_name(); tty->cr();
547
assert(holder_klass->is_loaded(), "");
548
//assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw)
549
// Note: this takes into account invokeinterface of methods declared in java/lang/Object,
550
// which should be invokevirtuals but according to the VM spec may be invokeinterfaces
551
assert(holder_klass->is_interface() || holder_klass->super() == nullptr || (bc() != Bytecodes::_invokeinterface), "must match bc");
552
// Note: In the absence of miranda methods, an abstract class K can perform
553
// an invokevirtual directly on an interface method I.m if K implements I.
555
// orig_callee is the resolved callee which's signature includes the
556
// appendix argument.
557
const int nargs = orig_callee->arg_size();
558
const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
560
// Push appendix argument (MethodType, CallSite, etc.), if one.
561
if (iter().has_appendix()) {562
ciObject* appendix_arg = iter().get_appendix();
563
const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg, /* require_const= */ true);
564
Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
565
push(appendix_arg_node);
568
// ---------------------
569
// Does Class Hierarchy Analysis reveal only a single target of a v-call?
570
// Then we may inline or make a static call, but become dependent on there being only 1 target.
571
// Does the call-site type profile reveal only one receiver?
572
// Then we may introduce a run-time check and inline on the path where it succeeds.
573
// The other path may uncommon_trap, check for another receiver, or do a v-call.
575
// Try to get the most accurate receiver type
576
ciMethod* callee = orig_callee;
577
int vtable_index = Method::invalid_vtable_index;
578
bool call_does_dispatch = false;
580
// Speculative type of the receiver if any
581
ciKlass* speculative_receiver_type = nullptr;
582
if (is_virtual_or_interface) {583
Node* receiver_node = stack(sp() - nargs);
584
const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
585
// call_does_dispatch and vtable_index are out-parameters. They might be changed.
586
// For arrays, klass below is Object. When vtable calls are used,
587
// resolving the call with Object would allow an illegal call to
588
// finalize() on an array. We use holder instead: illegal calls to
589
// finalize() won't be compiled as vtable calls (IC call
590
// resolution will catch the illegal call) and the few legal calls
591
// on array types won't be either.
592
callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
593
receiver_type, is_virtual,
594
call_does_dispatch, vtable_index); // out-parameters
595
speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
598
// Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
599
ciKlass* receiver_constraint = nullptr;
600
if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_initializer()) {601
ciInstanceKlass* calling_klass = method()->holder();
602
ciInstanceKlass* sender_klass = calling_klass;
603
if (sender_klass->is_interface()) {604
receiver_constraint = sender_klass;
606
} else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {607
assert(holder->is_interface(), "How did we get a non-interface method here!");
608
receiver_constraint = holder;
611
if (receiver_constraint != nullptr) {612
Node* receiver_node = stack(sp() - nargs);
613
Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
614
Node* bad_type_ctrl = nullptr;
615
Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
616
if (bad_type_ctrl != nullptr) {617
PreserveJVMState pjvms(this);
618
set_control(bad_type_ctrl);
619
uncommon_trap(Deoptimization::Reason_class_check,
620
Deoptimization::Action_none);
623
return; // MUST uncommon-trap?
625
set_stack(sp() - nargs, casted_receiver);
628
// Note: It's OK to try to inline a virtual call.
629
// The call generator will not attempt to inline a polymorphic call
630
// unless it knows how to optimize the receiver dispatch.
631
bool try_inline = (C->do_inlining() || InlineAccessors);
633
// ---------------------
634
dec_sp(nargs); // Temporarily pop args for JVM state of call
635
JVMState* jvms = sync_jvms();
637
// ---------------------
638
// Decide call tactic.
639
// This call checks with CHA, the interpreter profile, intrinsics table, etc.
640
// It decides whether inlining is desirable or not.
641
CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
643
// NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
644
orig_callee = callee = nullptr;
646
// ---------------------
647
// Round double arguments before call
648
round_double_arguments(cg->method());
650
// Feed profiling data for arguments to the type system so it can
651
// propagate it as speculative types
652
record_profiled_arguments_for_speculation(cg->method(), bc());
655
// bump global counters for calls
656
count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
658
// Record first part of parsing work for this call
659
parse_histogram()->record_change();
662
assert(jvms == this->jvms(), "still operating on the right JVMS");
663
assert(jvms_in_sync(), "jvms must carry full info into CG");
665
// save across call, for a subsequent cast_not_null.
666
Node* receiver = has_receiver ? argument(0) : nullptr;
668
// The extra CheckCastPPs for speculative types mess with PhaseStringOpts
669
if (receiver != nullptr && !call_does_dispatch && !cg->is_string_late_inline()) {670
// Feed profiling data for a single receiver to the type system so
671
// it can propagate it as a speculative type
672
receiver = record_profiled_receiver_for_speculation(receiver);
675
JVMState* new_jvms = cg->generate(jvms);
676
if (new_jvms == nullptr) {677
// When inlining attempt fails (e.g., too many arguments),
678
// it may contaminate the current compile state, making it
679
// impossible to pull back and try again. Once we call
680
// cg->generate(), we are committed. If it fails, the whole
681
// compilation task is compromised.
682
if (failing()) return;
684
// This can happen if a library intrinsic is available, but refuses
685
// the call site, perhaps because it did not match a pattern the
686
// intrinsic was expecting to optimize. Should always be possible to
687
// get a normal java call that may inline in that case
688
cg = C->call_generator(cg->method(), vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type, /* allow_intrinsics= */ false);
689
new_jvms = cg->generate(jvms);
690
if (new_jvms == nullptr) {691
guarantee(failing(), "call failed to generate: calls should work");
696
if (cg->is_inline()) {697
// Accumulate has_loops estimate
698
C->env()->notice_inlined_method(cg->method());
701
// Reset parser state from [new_]jvms, which now carries results of the call.
702
// Return value (if any) is already pushed on the stack by the cg.
703
add_exception_states_from(new_jvms);
704
if (new_jvms->map()->control() == top()) {707
assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged");
711
assert(check_call_consistency(jvms, cg), "inconsistent info");
714
// This was some sort of virtual call, which did a null check for us.
715
// Now we can assert receiver-not-null, on the normal return path.
716
if (receiver != nullptr && cg->is_virtual()) {717
Node* cast = cast_not_null(receiver);
718
// %%% assert(receiver == cast, "should already have cast the receiver");
721
ciType* rtype = cg->method()->return_type();
722
ciType* ctype = declared_signature->return_type();
724
if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {725
// Be careful here with return types.
726
if (ctype != rtype) {727
BasicType rt = rtype->basic_type();
728
BasicType ct = ctype->basic_type();
730
// It's OK for a method to return a value that is discarded.
731
// The discarding does not require any special action from the caller.
732
// The Java code knows this, at VerifyType.isNullConversion.
733
pop_node(rt); // whatever it was, pop it
734
} else if (rt == T_INT || is_subword_type(rt)) {735
// Nothing. These cases are handled in lambda form bytecode.
736
assert(ct == T_INT || is_subword_type(ct), "must match: rt=%s, ct=%s", type2name(rt), type2name(ct));
737
} else if (is_reference_type(rt)) {738
assert(is_reference_type(ct), "rt=%s, ct=%s", type2name(rt), type2name(ct));
739
if (ctype->is_loaded()) {740
const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
741
const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
742
if (arg_type != nullptr && !arg_type->higher_equal(sig_type)) {743
Node* retnode = pop();
744
Node* cast_obj = _gvn.transform(new CheckCastPPNode(control(), retnode, sig_type));
749
assert(rt == ct, "unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct));
750
// push a zero; it's better than getting an oop/int mismatch
752
Node* retnode = zerocon(ct);
753
push_node(ct, retnode);
755
// Now that the value is well-behaved, continue with the call-site type.
759
// Symbolic resolution enforces the types to be the same.
760
// NOTE: We must relax the assert for unloaded types because two
761
// different ciType instances of the same unloaded class type
762
// can appear to be "loaded" by different loaders (depending on
763
// the accessing class).
764
assert(!rtype->is_loaded() || !ctype->is_loaded() || rtype == ctype,
765
"mismatched return types: rtype=%s, ctype=%s", rtype->name(), ctype->name());
768
// If the return type of the method is not loaded, assert that the
769
// value we got is a null. Otherwise, we need to recompile.
770
if (!rtype->is_loaded()) {771
if (PrintOpto && (Verbose || WizardMode)) {772
method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());773
cg->method()->print_name(); tty->cr();
775
if (C->log() != nullptr) {776
C->log()->elem("assert_null reason='return' klass='%d'",777
C->log()->identify(rtype));
779
// If there is going to be a trap, put it at the next bytecode:
780
set_bci(iter().next_bci());
782
set_bci(iter().cur_bci()); // put it back
784
BasicType ct = ctype->basic_type();
785
if (is_reference_type(ct)) {786
record_profiled_return_for_speculation();
790
// Restart record of parsing work after possible inlining of call
792
parse_histogram()->set_initial_state(bc());
796
//---------------------------catch_call_exceptions-----------------------------
797
// Put a Catch and CatchProj nodes behind a just-created call.
798
// Send their caught exceptions to the proper handler.
799
// This may be used after a call to the rethrow VM stub,
800
// when it is needed to process unloaded exception classes.
801
void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {802
// Exceptions are delivered through this channel:
803
Node* i_o = this->i_o();
806
Arena tmp_mem{mtCompiler};807
GrowableArray<int> bcis(&tmp_mem, 8, 0, -1);
808
GrowableArray<const Type*> extypes(&tmp_mem, 8, 0, nullptr);
809
GrowableArray<int> saw_unloaded(&tmp_mem, 8, 0, -1);
811
bool default_handler = false;
812
for (; !handlers.is_done(); handlers.next()) {813
ciExceptionHandler* h = handlers.handler();
814
int h_bci = h->handler_bci();
815
ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
816
// Do not introduce unloaded exception types into the graph:
817
if (!h_klass->is_loaded()) {818
if (saw_unloaded.contains(h_bci)) {819
/* We've already seen an unloaded exception with h_bci,
820
so don't duplicate. Duplication will cause the CatchNode to be
821
unnecessarily large. See 4713716. */
824
saw_unloaded.append(h_bci);
827
const Type* h_extype = TypeOopPtr::make_from_klass(h_klass);
828
// (We use make_from_klass because it respects UseUniqueSubclasses.)
829
h_extype = h_extype->join(TypeInstPtr::NOTNULL);
830
assert(!h_extype->empty(), "sanity");
831
// Note: It's OK if the BCIs repeat themselves.
833
extypes.append(h_extype);
835
default_handler = true;
839
if (!default_handler) {841
const Type* extype = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
842
extype = extype->join(TypeInstPtr::NOTNULL);
843
extypes.append(extype);
846
int len = bcis.length();
847
CatchNode *cn = new CatchNode(control(), i_o, len+1);
848
Node *catch_ = _gvn.transform(cn);
850
// now branch with the exception state to each of the (potential)
852
for(int i=0; i < len; i++) {853
// Setup JVM state to enter the handler.
854
PreserveJVMState pjvms(this);
855
// Locals are just copied from before the call.
856
// Get control from the CatchNode.
857
int handler_bci = bcis.at(i);
858
Node* ctrl = _gvn.transform( new CatchProjNode(catch_, i+1,handler_bci));
859
// This handler cannot happen?
860
if (ctrl == top()) continue;
863
// Create exception oop
864
const TypeInstPtr* extype = extypes.at(i)->is_instptr();
865
Node* ex_oop = _gvn.transform(new CreateExNode(extypes.at(i), ctrl, i_o));
867
// Handle unloaded exception classes.
868
if (saw_unloaded.contains(handler_bci)) {869
// An unloaded exception type is coming here. Do an uncommon trap.
871
// We do not expect the same handler bci to take both cold unloaded
872
// and hot loaded exceptions. But, watch for it.
873
if (PrintOpto && (Verbose || WizardMode) && extype->is_loaded()) {874
tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci());875
method()->print_name(); tty->cr();
876
} else if (PrintOpto && (Verbose || WizardMode)) {877
tty->print("Bailing out on unloaded exception type ");878
extype->instance_klass()->print_name();
879
tty->print(" at bci:%d in ", bci());880
method()->print_name(); tty->cr();
883
// Emit an uncommon trap instead of processing the block.
884
set_bci(handler_bci);
886
uncommon_trap(Deoptimization::Reason_unloaded,
887
Deoptimization::Action_reinterpret,
888
extype->instance_klass(), "!loaded exception");
889
set_bci(iter().cur_bci()); // put it back
893
// go to the exception handler
894
if (handler_bci < 0) { // merge with corresponding rethrow node895
throw_to_exit(make_exception_state(ex_oop));
896
} else { // Else jump to corresponding handle897
push_ex_oop(ex_oop); // Clear stack and push just the oop.
898
merge_exception(handler_bci);
902
// The first CatchProj is for the normal return.
903
// (Note: If this is a call to rethrow_Java, this node goes dead.)
904
set_control(_gvn.transform( new CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
908
//----------------------------catch_inline_exceptions--------------------------
909
// Handle all exceptions thrown by an inlined method or individual bytecode.
910
// Common case 1: we have no handler, so all exceptions merge right into
912
// Case 2: we have some handlers, with loaded exception klasses that have
913
// no subklasses. We do a Deutsch-Schiffman style type-check on the incoming
914
// exception oop and branch to the handler directly.
915
// Case 3: We have some handlers with subklasses or are not loaded at
916
// compile-time. We have to call the runtime to resolve the exception.
917
// So we insert a RethrowCall and all the logic that goes with it.
918
void Parse::catch_inline_exceptions(SafePointNode* ex_map) {919
// Caller is responsible for saving away the map for normal control flow!
920
assert(stopped(), "call set_map(nullptr) first");
921
assert(method()->has_exception_handlers(), "don't come here w/o work to do");
923
Node* ex_node = saved_ex_oop(ex_map);
924
if (ex_node == top()) {928
const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr();
929
NOT_PRODUCT(if (ex_type==nullptr) tty->print_cr("*** Exception not InstPtr"));930
if (ex_type == nullptr)
931
ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
933
// determine potential exception handlers
934
ciExceptionHandlerStream handlers(method(), bci(),
935
ex_type->instance_klass(),
936
ex_type->klass_is_exact());
938
// Start executing from the given throw state. (Keep its stack, for now.)
939
// Get the exception oop as known at compile time.
940
ex_node = use_exception_state(ex_map);
942
// Get the exception oop klass from its header
943
Node* ex_klass_node = nullptr;
944
if (has_exception_handler() && !ex_type->klass_is_exact()) {945
Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
946
ex_klass_node = _gvn.transform(LoadKlassNode::make(_gvn, nullptr, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
948
// Compute the exception klass a little more cleverly.
949
// Obvious solution is to simple do a LoadKlass from the 'ex_node'.
950
// However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
951
// each arm of the Phi. If I know something clever about the exceptions
952
// I'm loading the class from, I can replace the LoadKlass with the
953
// klass constant for the exception oop.
954
if (ex_node->is_Phi()) {955
ex_klass_node = new PhiNode(ex_node->in(0), TypeInstKlassPtr::OBJECT);
956
for (uint i = 1; i < ex_node->req(); i++) {957
Node* ex_in = ex_node->in(i);
958
if (ex_in == top() || ex_in == nullptr) {959
// This path was not taken.
960
ex_klass_node->init_req(i, top());
963
Node* p = basic_plus_adr(ex_in, ex_in, oopDesc::klass_offset_in_bytes());
964
Node* k = _gvn.transform( LoadKlassNode::make(_gvn, nullptr, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
965
ex_klass_node->init_req( i, k );
967
ex_klass_node = _gvn.transform(ex_klass_node);
971
// Scan the exception table for applicable handlers.
972
// If none, we can call rethrow() and be done!
973
// If precise (loaded with no subklasses), insert a D.S. style
974
// pointer compare to the correct handler and loop back.
975
// If imprecise, switch to the Rethrow VM-call style handling.
977
int remaining = handlers.count_remaining();
979
// iterate through all entries sequentially
980
for (;!handlers.is_done(); handlers.next()) {981
ciExceptionHandler* handler = handlers.handler();
983
if (handler->is_rethrow()) {984
// If we fell off the end of the table without finding an imprecise
985
// exception klass (and without finding a generic handler) then we
986
// know this exception is not handled in this method. We just rethrow
987
// the exception into the caller.
988
throw_to_exit(make_exception_state(ex_node));
992
// exception handler bci range covers throw_bci => investigate further
993
int handler_bci = handler->handler_bci();
995
if (remaining == 1) {996
push_ex_oop(ex_node); // Push exception oop for handler
997
if (PrintOpto && WizardMode) {998
tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci);1000
// If this is a backwards branch in the bytecodes, add safepoint
1001
maybe_add_safepoint(handler_bci);
1002
merge_exception(handler_bci); // jump to handler
1003
return; // No more handling to be done here!
1006
// Get the handler's klass
1007
ciInstanceKlass* klass = handler->catch_klass();
1009
if (!klass->is_loaded()) { // klass is not loaded?1010
// fall through into catch_call_exceptions which will emit a
1011
// handler with an uncommon trap.
1015
if (klass->is_interface()) // should not happen, but...
1018
// Check the type of the exception against the catch type
1019
const TypeKlassPtr *tk = TypeKlassPtr::make(klass);
1020
Node* con = _gvn.makecon(tk);
1021
Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con);
1023
PreserveJVMState pjvms(this);
1024
const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr();
1025
assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness");
1026
Node* ex_oop = _gvn.transform(new CheckCastPPNode(control(), ex_node, tinst));
1027
push_ex_oop(ex_oop); // Push exception oop for handler
1028
if (PrintOpto && WizardMode) {1029
tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci);1030
klass->print_name();
1033
// If this is a backwards branch in the bytecodes, add safepoint
1034
maybe_add_safepoint(handler_bci);
1035
merge_exception(handler_bci);
1037
set_control(not_subtype_ctrl);
1039
// Come here if exception does not match handler.
1040
// Carry on with more handler checks.
1044
assert(!stopped(), "you should return if you finish the chain");
1046
// Oops, need to call into the VM to resolve the klasses at runtime.
1047
// Note: This call must not deoptimize, since it is not a real at this bci!
1050
make_runtime_call(RC_NO_LEAF | RC_MUST_THROW,
1051
OptoRuntime::rethrow_Type(),
1052
OptoRuntime::rethrow_stub(),
1056
// Rethrow is a pure call, no side effects, only a result.
1057
// The result cannot be allocated, so we use I_O
1059
// Catch exceptions from the rethrow
1060
catch_call_exceptions(handlers);
1064
// (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.)
1068
void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) {1069
if( CountCompiledCalls ) {1070
if( at_method_entry ) {1071
// bump invocation counter if top method (for statistics)
1072
if (CountCompiledCalls && depth() == 1) {1073
const TypePtr* addr_type = TypeMetadataPtr::make(method());
1074
Node* adr1 = makecon(addr_type);
1075
Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset()));
1076
increment_counter(adr2);
1078
} else if (is_inline) {1080
case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break;
1081
case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break;
1082
case Bytecodes::_invokestatic:
1083
case Bytecodes::_invokedynamic:
1084
case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break;
1085
default: fatal("unexpected call bytecode");1089
case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break;
1090
case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break;
1091
case Bytecodes::_invokestatic:
1092
case Bytecodes::_invokedynamic:
1093
case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break;
1094
default: fatal("unexpected call bytecode");1102
ciMethod* Compile::optimize_virtual_call(ciMethod* caller, ciInstanceKlass* klass,
1103
ciKlass* holder, ciMethod* callee,
1104
const TypeOopPtr* receiver_type, bool is_virtual,
1105
bool& call_does_dispatch, int& vtable_index,
1106
bool check_access) {1107
// Set default values for out-parameters.
1108
call_does_dispatch = true;
1109
vtable_index = Method::invalid_vtable_index;
1111
// Choose call strategy.
1112
ciMethod* optimized_virtual_method = optimize_inlining(caller, klass, holder, callee,
1113
receiver_type, check_access);
1115
// Have the call been sufficiently improved such that it is no longer a virtual?
1116
if (optimized_virtual_method != nullptr) {1117
callee = optimized_virtual_method;
1118
call_does_dispatch = false;
1119
} else if (!UseInlineCaches && is_virtual && callee->is_loaded()) {1120
// We can make a vtable call at this site
1121
vtable_index = callee->resolve_vtable_index(caller->holder(), holder);
1126
// Identify possible target method and inlining style
1127
ciMethod* Compile::optimize_inlining(ciMethod* caller, ciInstanceKlass* klass, ciKlass* holder,
1128
ciMethod* callee, const TypeOopPtr* receiver_type,
1129
bool check_access) {1130
// only use for virtual or interface calls
1132
// If it is obviously final, do not bother to call find_monomorphic_target,
1133
// because the class hierarchy checks are not needed, and may fail due to
1134
// incompletely loaded classes. Since we do our own class loading checks
1135
// in this module, we may confidently bind to any method.
1136
if (callee->can_be_statically_bound()) {1140
if (receiver_type == nullptr) {1141
return nullptr; // no receiver type info
1144
// Attempt to improve the receiver
1145
bool actual_receiver_is_exact = false;
1146
ciInstanceKlass* actual_receiver = klass;
1147
// Array methods are all inherited from Object, and are monomorphic.
1148
// finalize() call on array is not allowed.
1149
if (receiver_type->isa_aryptr() &&
1150
callee->holder() == env()->Object_klass() &&
1151
callee->name() != ciSymbols::finalize_method_name()) {1155
// All other interesting cases are instance klasses.
1156
if (!receiver_type->isa_instptr()) {1160
ciInstanceKlass* receiver_klass = receiver_type->is_instptr()->instance_klass();
1161
if (receiver_klass->is_loaded() && receiver_klass->is_initialized() && !receiver_klass->is_interface() &&
1162
(receiver_klass == actual_receiver || receiver_klass->is_subtype_of(actual_receiver))) {1163
// ikl is a same or better type than the original actual_receiver,
1164
// e.g. static receiver from bytecodes.
1165
actual_receiver = receiver_klass;
1166
// Is the actual_receiver exact?
1167
actual_receiver_is_exact = receiver_type->klass_is_exact();
1170
ciInstanceKlass* calling_klass = caller->holder();
1171
ciMethod* cha_monomorphic_target = callee->find_monomorphic_target(calling_klass, klass, actual_receiver, check_access);
1173
if (cha_monomorphic_target != nullptr) {1174
// Hardwiring a virtual.
1175
assert(!callee->can_be_statically_bound(), "should have been handled earlier");
1176
assert(!cha_monomorphic_target->is_abstract(), "");
1177
if (!cha_monomorphic_target->can_be_statically_bound(actual_receiver)) {1178
// If we inlined because CHA revealed only a single target method,
1179
// then we are dependent on that target method not getting overridden
1180
// by dynamic class loading. Be sure to test the "static" receiver
1181
// dest_method here, as opposed to the actual receiver, which may
1182
// falsely lead us to believe that the receiver is final or private.
1183
dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target, holder, callee);
1185
return cha_monomorphic_target;
1188
// If the type is exact, we can still bind the method w/o a vcall.
1189
// (This case comes after CHA so we can see how much extra work it does.)
1190
if (actual_receiver_is_exact) {1191
// In case of evolution, there is a dependence on every inlined method, since each
1192
// such method can be changed when its class is redefined.
1193
ciMethod* exact_method = callee->resolve_invoke(calling_klass, actual_receiver);
1194
if (exact_method != nullptr) {1195
return exact_method;