author | twisti |
Mon, 28 Mar 2011 03:58:07 -0700 | |
changeset 8872 | 36680c58660e |
parent 8676 | 9098d4e927e1 |
child 9435 | b16821523fe3 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1998, 2011, 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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* |
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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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* |
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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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* |
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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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* |
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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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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "classfile/systemDictionary.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 "oops/objArrayKlass.hpp" |
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#include "opto/callGenerator.hpp" |
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#include "opto/parse.hpp" |
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#include "runtime/handles.inline.hpp" |
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//============================================================================= |
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//------------------------------InlineTree------------------------------------- |
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InlineTree::InlineTree( Compile* c, |
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const InlineTree *caller_tree, ciMethod* callee, |
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JVMState* caller_jvms, int caller_bci, |
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float site_invoke_ratio, int site_depth_adjust) |
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: C(c), _caller_jvms(caller_jvms), |
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_caller_tree((InlineTree*)caller_tree), |
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_method(callee), _site_invoke_ratio(site_invoke_ratio), |
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_site_depth_adjust(site_depth_adjust), |
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_count_inline_bcs(method()->code_size()) |
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{ |
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NOT_PRODUCT(_count_inlines = 0;) |
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if (_caller_jvms != NULL) { |
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// Keep a private copy of the caller_jvms: |
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_caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms()); |
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_caller_jvms->set_bci(caller_jvms->bci()); |
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assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining"); |
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} |
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assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS"); |
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assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter"); |
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assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter"); |
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if (UseOldInlining) { |
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// Update hierarchical counts, count_inline_bcs() and count_inlines() |
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InlineTree *caller = (InlineTree *)caller_tree; |
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for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) { |
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caller->_count_inline_bcs += count_inline_bcs(); |
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NOT_PRODUCT(caller->_count_inlines++;) |
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} |
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} |
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} |
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InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms, |
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float site_invoke_ratio, int site_depth_adjust) |
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: C(c), _caller_jvms(caller_jvms), _caller_tree(NULL), |
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_method(callee_method), _site_invoke_ratio(site_invoke_ratio), |
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_site_depth_adjust(site_depth_adjust), |
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_count_inline_bcs(method()->code_size()) |
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{ |
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NOT_PRODUCT(_count_inlines = 0;) |
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assert(!UseOldInlining, "do not use for old stuff"); |
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} |
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static bool is_init_with_ea(ciMethod* callee_method, |
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ciMethod* caller_method, Compile* C) { |
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// True when EA is ON and a java constructor is called or |
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// a super constructor is called from an inlined java constructor. |
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return C->do_escape_analysis() && EliminateAllocations && |
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( callee_method->is_initializer() || |
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(caller_method->is_initializer() && |
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caller_method != C->method() && |
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caller_method->holder()->is_subclass_of(callee_method->holder())) |
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); |
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} |
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// positive filter: should send be inlined? returns NULL, if yes, or rejection msg |
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const char* InlineTree::shouldInline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) const { |
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// Allows targeted inlining |
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if(callee_method->should_inline()) { |
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*wci_result = *(WarmCallInfo::always_hot()); |
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if (PrintInlining && Verbose) { |
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CompileTask::print_inline_indent(inline_depth()); |
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tty->print_cr("Inlined method is hot: "); |
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} |
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return NULL; |
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} |
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// positive filter: should send be inlined? returns NULL (--> yes) |
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// or rejection msg |
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int max_size = C->max_inline_size(); |
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int size = callee_method->code_size(); |
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// Check for too many throws (and not too huge) |
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if(callee_method->interpreter_throwout_count() > InlineThrowCount && |
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size < InlineThrowMaxSize ) { |
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wci_result->set_profit(wci_result->profit() * 100); |
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if (PrintInlining && Verbose) { |
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CompileTask::print_inline_indent(inline_depth()); |
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tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); |
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} |
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return NULL; |
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} |
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if (!UseOldInlining) { |
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return NULL; // size and frequency are represented in a new way |
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} |
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int call_site_count = method()->scale_count(profile.count()); |
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int invoke_count = method()->interpreter_invocation_count(); |
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assert( invoke_count != 0, "Require invokation count greater than zero"); |
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int freq = call_site_count/invoke_count; |
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// bump the max size if the call is frequent |
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if ((freq >= InlineFrequencyRatio) || |
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(call_site_count >= InlineFrequencyCount) || |
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is_init_with_ea(callee_method, caller_method, C)) { |
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max_size = C->freq_inline_size(); |
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if (size <= max_size && TraceFrequencyInlining) { |
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CompileTask::print_inline_indent(inline_depth()); |
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tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); |
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CompileTask::print_inline_indent(inline_depth()); |
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callee_method->print(); |
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tty->cr(); |
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} |
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} else { |
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// Not hot. Check for medium-sized pre-existing nmethod at cold sites. |
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if (callee_method->has_compiled_code() && |
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callee_method->instructions_size(CompLevel_full_optimization) > InlineSmallCode/4) |
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return "already compiled into a medium method"; |
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} |
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if (size > max_size) { |
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if (max_size > C->max_inline_size()) |
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return "hot method too big"; |
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return "too big"; |
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} |
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return NULL; |
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} |
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// negative filter: should send NOT be inlined? returns NULL, ok to inline, or rejection msg |
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const char* InlineTree::shouldNotInline(ciMethod *callee_method, ciMethod* caller_method, WarmCallInfo* wci_result) const { |
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// negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg |
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if (!UseOldInlining) { |
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const char* fail = NULL; |
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if (callee_method->is_abstract()) fail = "abstract method"; |
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// note: we allow ik->is_abstract() |
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if (!callee_method->holder()->is_initialized()) fail = "method holder not initialized"; |
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if (callee_method->is_native()) fail = "native method"; |
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if (fail) { |
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*wci_result = *(WarmCallInfo::always_cold()); |
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return fail; |
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} |
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if (callee_method->has_unloaded_classes_in_signature()) { |
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wci_result->set_profit(wci_result->profit() * 0.1); |
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} |
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// don't inline exception code unless the top method belongs to an |
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// exception class |
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if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { |
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ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method(); |
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if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { |
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wci_result->set_profit(wci_result->profit() * 0.1); |
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} |
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} |
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if (callee_method->has_compiled_code() && callee_method->instructions_size(CompLevel_full_optimization) > InlineSmallCode) { |
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wci_result->set_profit(wci_result->profit() * 0.1); |
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// %%% adjust wci_result->size()? |
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} |
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return NULL; |
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} |
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// Always inline MethodHandle methods and generated MethodHandle adapters. |
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if (callee_method->is_method_handle_invoke() || callee_method->is_method_handle_adapter()) |
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return NULL; |
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// First check all inlining restrictions which are required for correctness |
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if (callee_method->is_abstract()) return "abstract method"; |
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// note: we allow ik->is_abstract() |
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if (!callee_method->holder()->is_initialized()) return "method holder not initialized"; |
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if (callee_method->is_native()) return "native method"; |
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if (callee_method->has_unloaded_classes_in_signature()) return "unloaded signature classes"; |
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if (callee_method->should_inline()) { |
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// ignore heuristic controls on inlining |
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return NULL; |
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} |
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// Now perform checks which are heuristic |
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if( callee_method->has_compiled_code() && callee_method->instructions_size(CompLevel_full_optimization) > InlineSmallCode ) |
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return "already compiled into a big method"; |
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// don't inline exception code unless the top method belongs to an |
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// exception class |
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if (caller_tree() != NULL && |
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callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { |
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const InlineTree *top = this; |
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while (top->caller_tree() != NULL) top = top->caller_tree(); |
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ciInstanceKlass* k = top->method()->holder(); |
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if (!k->is_subclass_of(C->env()->Throwable_klass())) |
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return "exception method"; |
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} |
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// use frequency-based objections only for non-trivial methods |
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if (callee_method->code_size() <= MaxTrivialSize) return NULL; |
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// don't use counts with -Xcomp or CTW |
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if (UseInterpreter && !CompileTheWorld) { |
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if (!callee_method->has_compiled_code() && |
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!callee_method->was_executed_more_than(0)) { |
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return "never executed"; |
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} |
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if (is_init_with_ea(callee_method, caller_method, C)) { |
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// Escape Analysis: inline all executed constructors |
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} else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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CompileThreshold >> 1))) { |
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return "executed < MinInliningThreshold times"; |
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} |
1 | 243 |
} |
244 |
||
245 |
if (callee_method->should_not_inline()) { |
|
246 |
return "disallowed by CompilerOracle"; |
|
247 |
} |
|
248 |
||
2342 | 249 |
if (UseStringCache) { |
250 |
// Do not inline StringCache::profile() method used only at the beginning. |
|
251 |
if (callee_method->name() == ciSymbol::profile_name() && |
|
252 |
callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) { |
|
253 |
return "profiling method"; |
|
254 |
} |
|
255 |
} |
|
256 |
||
1 | 257 |
return NULL; |
258 |
} |
|
259 |
||
260 |
//-----------------------------try_to_inline----------------------------------- |
|
261 |
// return NULL if ok, reason for not inlining otherwise |
|
262 |
// Relocated from "InliningClosure::try_to_inline" |
|
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const char* InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) { |
1 | 264 |
|
265 |
// Old algorithm had funny accumulating BC-size counters |
|
266 |
if (UseOldInlining && ClipInlining |
|
267 |
&& (int)count_inline_bcs() >= DesiredMethodLimit) { |
|
268 |
return "size > DesiredMethodLimit"; |
|
269 |
} |
|
270 |
||
271 |
const char *msg = NULL; |
|
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272 |
if ((msg = shouldInline(callee_method, caller_method, caller_bci, |
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273 |
profile, wci_result)) != NULL) { |
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274 |
return msg; |
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275 |
} |
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276 |
if ((msg = shouldNotInline(callee_method, caller_method, |
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277 |
wci_result)) != NULL) { |
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278 |
return msg; |
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279 |
} |
1 | 280 |
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281 |
if (InlineAccessors && callee_method->is_accessor()) { |
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282 |
// accessor methods are not subject to any of the following limits. |
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283 |
return NULL; |
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284 |
} |
1 | 285 |
|
286 |
// suppress a few checks for accessors and trivial methods |
|
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287 |
if (callee_method->code_size() > MaxTrivialSize) { |
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288 |
|
1 | 289 |
// don't inline into giant methods |
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290 |
if (C->unique() > (uint)NodeCountInliningCutoff) { |
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291 |
return "NodeCountInliningCutoff"; |
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292 |
} |
1 | 293 |
|
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294 |
if ((!UseInterpreter || CompileTheWorld) && |
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295 |
is_init_with_ea(callee_method, caller_method, C)) { |
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296 |
|
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297 |
// Escape Analysis stress testing when running Xcomp or CTW: |
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298 |
// inline constructors even if they are not reached. |
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299 |
|
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300 |
} else if (profile.count() == 0) { |
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301 |
// don't inline unreached call sites |
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302 |
return "call site not reached"; |
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|
303 |
} |
1 | 304 |
} |
305 |
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306 |
if (!C->do_inlining() && InlineAccessors) { |
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307 |
return "not an accessor"; |
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|
308 |
} |
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309 |
if( inline_depth() > MaxInlineLevel ) { |
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310 |
return "inlining too deep"; |
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|
311 |
} |
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312 |
|
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313 |
// We need to detect recursive inlining of method handle targets: if |
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|
314 |
// the current method is a method handle adapter and one of the |
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|
315 |
// callers is the same method as the callee, we bail out if |
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|
316 |
// MaxRecursiveInlineLevel is hit. |
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|
317 |
if (method()->is_method_handle_adapter()) { |
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|
318 |
JVMState* jvms = caller_jvms(); |
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|
319 |
int inline_level = 0; |
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|
320 |
while (jvms != NULL && jvms->has_method()) { |
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|
321 |
if (jvms->method() == callee_method) { |
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|
322 |
inline_level++; |
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|
323 |
if (inline_level > MaxRecursiveInlineLevel) |
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|
324 |
return "recursively inlining too deep"; |
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|
325 |
} |
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|
326 |
jvms = jvms->caller(); |
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|
327 |
} |
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|
328 |
} |
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|
329 |
|
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|
330 |
if (method() == callee_method && inline_depth() > MaxRecursiveInlineLevel) { |
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331 |
return "recursively inlining too deep"; |
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|
332 |
} |
1 | 333 |
|
334 |
int size = callee_method->code_size(); |
|
335 |
||
336 |
if (UseOldInlining && ClipInlining |
|
337 |
&& (int)count_inline_bcs() + size >= DesiredMethodLimit) { |
|
338 |
return "size > DesiredMethodLimit"; |
|
339 |
} |
|
340 |
||
341 |
// ok, inline this method |
|
342 |
return NULL; |
|
343 |
} |
|
344 |
||
345 |
//------------------------------pass_initial_checks---------------------------- |
|
346 |
bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { |
|
347 |
ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; |
|
348 |
// Check if a callee_method was suggested |
|
349 |
if( callee_method == NULL ) return false; |
|
350 |
// Check if klass of callee_method is loaded |
|
351 |
if( !callee_holder->is_loaded() ) return false; |
|
352 |
if( !callee_holder->is_initialized() ) return false; |
|
353 |
if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { |
|
354 |
// Checks that constant pool's call site has been visited |
|
355 |
// stricter than callee_holder->is_initialized() |
|
356 |
ciBytecodeStream iter(caller_method); |
|
357 |
iter.force_bci(caller_bci); |
|
358 |
Bytecodes::Code call_bc = iter.cur_bc(); |
|
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|
359 |
// An invokedynamic instruction does not have a klass. |
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|
360 |
if (call_bc != Bytecodes::_invokedynamic) { |
5688 | 361 |
int index = iter.get_index_u2_cpcache(); |
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|
362 |
if (!caller_method->is_klass_loaded(index, true)) { |
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|
363 |
return false; |
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|
364 |
} |
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|
365 |
// Try to do constant pool resolution if running Xcomp |
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|
366 |
if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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|
367 |
return false; |
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|
368 |
} |
1 | 369 |
} |
370 |
} |
|
371 |
// We will attempt to see if a class/field/etc got properly loaded. If it |
|
372 |
// did not, it may attempt to throw an exception during our probing. Catch |
|
373 |
// and ignore such exceptions and do not attempt to compile the method. |
|
374 |
if( callee_method->should_exclude() ) return false; |
|
375 |
||
376 |
return true; |
|
377 |
} |
|
378 |
||
379 |
#ifndef PRODUCT |
|
380 |
//------------------------------print_inlining--------------------------------- |
|
381 |
// Really, the failure_msg can be a success message also. |
|
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382 |
void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, const char* failure_msg) const { |
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|
383 |
CompileTask::print_inlining(callee_method, inline_depth(), caller_bci, failure_msg ? failure_msg : "inline"); |
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|
384 |
if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); |
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|
385 |
if (Verbose && callee_method) { |
1 | 386 |
const InlineTree *top = this; |
387 |
while( top->caller_tree() != NULL ) { top = top->caller_tree(); } |
|
388 |
tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); |
|
389 |
} |
|
390 |
} |
|
391 |
#endif |
|
392 |
||
393 |
//------------------------------ok_to_inline----------------------------------- |
|
394 |
WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci) { |
|
395 |
assert(callee_method != NULL, "caller checks for optimized virtual!"); |
|
396 |
#ifdef ASSERT |
|
397 |
// Make sure the incoming jvms has the same information content as me. |
|
398 |
// This means that we can eventually make this whole class AllStatic. |
|
399 |
if (jvms->caller() == NULL) { |
|
400 |
assert(_caller_jvms == NULL, "redundant instance state"); |
|
401 |
} else { |
|
402 |
assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); |
|
403 |
} |
|
404 |
assert(_method == jvms->method(), "redundant instance state"); |
|
405 |
#endif |
|
406 |
const char *failure_msg = NULL; |
|
407 |
int caller_bci = jvms->bci(); |
|
408 |
ciMethod *caller_method = jvms->method(); |
|
409 |
||
410 |
if( !pass_initial_checks(caller_method, caller_bci, callee_method)) { |
|
411 |
if( PrintInlining ) { |
|
412 |
failure_msg = "failed_initial_checks"; |
|
413 |
print_inlining( callee_method, caller_bci, failure_msg); |
|
414 |
} |
|
415 |
return NULL; |
|
416 |
} |
|
417 |
||
418 |
// Check if inlining policy says no. |
|
419 |
WarmCallInfo wci = *(initial_wci); |
|
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420 |
failure_msg = try_to_inline(callee_method, caller_method, caller_bci, profile, &wci); |
1 | 421 |
if (failure_msg != NULL && C->log() != NULL) { |
422 |
C->log()->begin_elem("inline_fail reason='"); |
|
423 |
C->log()->text("%s", failure_msg); |
|
424 |
C->log()->end_elem("'"); |
|
425 |
} |
|
426 |
||
427 |
#ifndef PRODUCT |
|
428 |
if (UseOldInlining && InlineWarmCalls |
|
429 |
&& (PrintOpto || PrintOptoInlining || PrintInlining)) { |
|
430 |
bool cold = wci.is_cold(); |
|
431 |
bool hot = !cold && wci.is_hot(); |
|
432 |
bool old_cold = (failure_msg != NULL); |
|
433 |
if (old_cold != cold || (Verbose || WizardMode)) { |
|
434 |
tty->print(" OldInlining= %4s : %s\n WCI=", |
|
435 |
old_cold ? "cold" : "hot", failure_msg ? failure_msg : "OK"); |
|
436 |
wci.print(); |
|
437 |
} |
|
438 |
} |
|
439 |
#endif |
|
440 |
if (UseOldInlining) { |
|
441 |
if (failure_msg == NULL) |
|
442 |
wci = *(WarmCallInfo::always_hot()); |
|
443 |
else |
|
444 |
wci = *(WarmCallInfo::always_cold()); |
|
445 |
} |
|
446 |
if (!InlineWarmCalls) { |
|
447 |
if (!wci.is_cold() && !wci.is_hot()) { |
|
448 |
// Do not inline the warm calls. |
|
449 |
wci = *(WarmCallInfo::always_cold()); |
|
450 |
} |
|
451 |
} |
|
452 |
||
453 |
if (!wci.is_cold()) { |
|
454 |
// In -UseOldInlining, the failure_msg may also be a success message. |
|
455 |
if (failure_msg == NULL) failure_msg = "inline (hot)"; |
|
456 |
||
457 |
// Inline! |
|
458 |
if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg); |
|
459 |
if (UseOldInlining) |
|
460 |
build_inline_tree_for_callee(callee_method, jvms, caller_bci); |
|
461 |
if (InlineWarmCalls && !wci.is_hot()) |
|
462 |
return new (C) WarmCallInfo(wci); // copy to heap |
|
463 |
return WarmCallInfo::always_hot(); |
|
464 |
} |
|
465 |
||
466 |
// Do not inline |
|
467 |
if (failure_msg == NULL) failure_msg = "too cold to inline"; |
|
468 |
if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg); |
|
469 |
return NULL; |
|
470 |
} |
|
471 |
||
472 |
//------------------------------compute_callee_frequency----------------------- |
|
473 |
float InlineTree::compute_callee_frequency( int caller_bci ) const { |
|
474 |
int count = method()->interpreter_call_site_count(caller_bci); |
|
475 |
int invcnt = method()->interpreter_invocation_count(); |
|
476 |
float freq = (float)count/(float)invcnt; |
|
477 |
// Call-site count / interpreter invocation count, scaled recursively. |
|
478 |
// Always between 0.0 and 1.0. Represents the percentage of the method's |
|
479 |
// total execution time used at this call site. |
|
480 |
||
481 |
return freq; |
|
482 |
} |
|
483 |
||
484 |
//------------------------------build_inline_tree_for_callee------------------- |
|
485 |
InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { |
|
486 |
float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); |
|
487 |
// Attempt inlining. |
|
488 |
InlineTree* old_ilt = callee_at(caller_bci, callee_method); |
|
489 |
if (old_ilt != NULL) { |
|
490 |
return old_ilt; |
|
491 |
} |
|
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|
492 |
int new_depth_adjust = 0; |
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493 |
if (caller_jvms->method() != NULL) { |
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494 |
if (caller_jvms->method()->is_method_handle_adapter()) |
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495 |
new_depth_adjust -= 1; // don't count actions in MH or indy adapter frames |
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496 |
else if (callee_method->is_method_handle_invoke()) { |
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|
497 |
new_depth_adjust -= 1; // don't count method handle calls from java.lang.invoke implem |
4586
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|
498 |
} |
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499 |
if (new_depth_adjust != 0 && PrintInlining) { |
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|
500 |
stringStream nm1; caller_jvms->method()->print_name(&nm1); |
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|
501 |
stringStream nm2; callee_method->print_name(&nm2); |
f1c484fca023
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|
502 |
tty->print_cr("discounting inlining depth from %s to %s", nm1.base(), nm2.base()); |
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|
503 |
} |
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|
504 |
if (new_depth_adjust != 0 && C->log()) { |
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|
505 |
int id1 = C->log()->identify(caller_jvms->method()); |
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|
506 |
int id2 = C->log()->identify(callee_method); |
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|
507 |
C->log()->elem("inline_depth_discount caller='%d' callee='%d'", id1, id2); |
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|
508 |
} |
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|
509 |
} |
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|
510 |
InlineTree *ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _site_depth_adjust + new_depth_adjust); |
1 | 511 |
_subtrees.append( ilt ); |
512 |
||
513 |
NOT_PRODUCT( _count_inlines += 1; ) |
|
514 |
||
515 |
return ilt; |
|
516 |
} |
|
517 |
||
518 |
||
519 |
//---------------------------------------callee_at----------------------------- |
|
520 |
InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { |
|
521 |
for (int i = 0; i < _subtrees.length(); i++) { |
|
522 |
InlineTree* sub = _subtrees.at(i); |
|
523 |
if (sub->caller_bci() == bci && callee == sub->method()) { |
|
524 |
return sub; |
|
525 |
} |
|
526 |
} |
|
527 |
return NULL; |
|
528 |
} |
|
529 |
||
530 |
||
531 |
//------------------------------build_inline_tree_root------------------------- |
|
532 |
InlineTree *InlineTree::build_inline_tree_root() { |
|
533 |
Compile* C = Compile::current(); |
|
534 |
||
535 |
// Root of inline tree |
|
4586
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|
536 |
InlineTree *ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, 0); |
1 | 537 |
|
538 |
return ilt; |
|
539 |
} |
|
540 |
||
541 |
||
542 |
//-------------------------find_subtree_from_root----------------------------- |
|
543 |
// Given a jvms, which determines a call chain from the root method, |
|
544 |
// find the corresponding inline tree. |
|
545 |
// Note: This method will be removed or replaced as InlineTree goes away. |
|
546 |
InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee, bool create_if_not_found) { |
|
547 |
InlineTree* iltp = root; |
|
548 |
uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; |
|
549 |
for (uint d = 1; d <= depth; d++) { |
|
550 |
JVMState* jvmsp = jvms->of_depth(d); |
|
551 |
// Select the corresponding subtree for this bci. |
|
552 |
assert(jvmsp->method() == iltp->method(), "tree still in sync"); |
|
553 |
ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); |
|
554 |
InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); |
|
555 |
if (!sub) { |
|
556 |
if (create_if_not_found && d == depth) { |
|
557 |
return iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); |
|
558 |
} |
|
559 |
assert(sub != NULL, "should be a sub-ilt here"); |
|
560 |
return NULL; |
|
561 |
} |
|
562 |
iltp = sub; |
|
563 |
} |
|
564 |
return iltp; |
|
565 |
} |