jdk8-mips64-public/hotspot: src/share/vm/opto/bytecodeInfo.cpp@a61af66fc99e (annotated)

src/share/vm/opto/bytecodeInfo.cpp@a61af66fc99e (annotated)

src/share/vm/opto/bytecodeInfo.cpp

Sat, 01 Dec 2007 00:00:00 +0000

author: duke
date: Sat, 01 Dec 2007 00:00:00 +0000
changeset 435: a61af66fc99e
child 476: 874b2c4f43d1
permissions: -rw-r--r--

Initial load

 /*
  * Copyright 1998-2006 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_bytecodeInfo.cpp.incl"
 // These variables are declared in parse1.cpp
 extern int  explicit_null_checks_inserted;
 extern int  explicit_null_checks_elided;
 extern int  explicit_null_checks_inserted_old;
 extern int  explicit_null_checks_elided_old;
 extern int  nodes_created_old;
 extern int  nodes_created;
 extern int  methods_parsed_old;
 extern int  methods_parsed;
 extern int  methods_seen;
 extern int  methods_seen_old;
 //=============================================================================
 //------------------------------InlineTree-------------------------------------
 InlineTree::InlineTree( Compile* c, const InlineTree *caller_tree, ciMethod* callee, JVMState* caller_jvms, int caller_bci, float site_invoke_ratio )
 : C(c), _caller_jvms(caller_jvms),
   _caller_tree((InlineTree*)caller_tree),
   _method(callee), _site_invoke_ratio(site_invoke_ratio),
   _count_inline_bcs(method()->code_size()) {
   NOT_PRODUCT(_count_inlines = 0;)
   if (_caller_jvms != NULL) {
     // Keep a private copy of the caller_jvms:
     _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms());
     _caller_jvms->set_bci(caller_jvms->bci());
   }
   assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS");
   assert((caller_tree == NULL ? 0 : caller_tree->inline_depth() + 1) == inline_depth(), "correct (redundant) depth parameter");
   assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter");
   if (UseOldInlining) {
     // Update hierarchical counts, count_inline_bcs() and count_inlines()
     InlineTree *caller = (InlineTree *)caller_tree;
     for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) {
       caller->_count_inline_bcs += count_inline_bcs();
       NOT_PRODUCT(caller->_count_inlines++;)
     }
   }
 }
 InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms, float site_invoke_ratio)
 : C(c), _caller_jvms(caller_jvms), _caller_tree(NULL),
   _method(callee_method), _site_invoke_ratio(site_invoke_ratio),
   _count_inline_bcs(method()->code_size()) {
   NOT_PRODUCT(_count_inlines = 0;)
   assert(!UseOldInlining, "do not use for old stuff");
 }
 static void print_indent(int depth) {
   tty->print("      ");
   for (int i = depth; i != 0; --i) tty->print("  ");
 }
 // positive filter: should send be inlined?  returns NULL, if yes, or rejection msg
 const char* InlineTree::shouldInline(ciMethod* callee_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) const {
   // Allows targeted inlining
   if(callee_method->should_inline()) {
     *wci_result = *(WarmCallInfo::always_hot());
     if (PrintInlining && Verbose) {
       print_indent(inline_depth());
       tty->print_cr("Inlined method is hot: ");
     }
     return NULL;
   }
   // positive filter: should send be inlined?  returns NULL (--> yes)
   // or rejection msg
   int max_size = C->max_inline_size();
   int size     = callee_method->code_size();
   // Check for too many throws (and not too huge)
   if(callee_method->interpreter_throwout_count() > InlineThrowCount && size < InlineThrowMaxSize ) {
     wci_result->set_profit(wci_result->profit() * 100);
     if (PrintInlining && Verbose) {
       print_indent(inline_depth());
       tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count());
     }
     return NULL;
   }
   if (!UseOldInlining) {
     return NULL;  // size and frequency are represented in a new way
   }
   int call_site_count  = method()->scale_count(profile.count());
   int invoke_count     = method()->interpreter_invocation_count();
   assert( invoke_count != 0, "Require invokation count greater than zero");
   int freq = call_site_count/invoke_count;
   // bump the max size if the call is frequent
   if ((freq >= InlineFrequencyRatio) || (call_site_count >= InlineFrequencyCount)) {
     max_size = C->freq_inline_size();
     if (size <= max_size && TraceFrequencyInlining) {
       print_indent(inline_depth());
       tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count);
       print_indent(inline_depth());
       callee_method->print();
       tty->cr();
     }
   } else {
     // Not hot.  Check for medium-sized pre-existing nmethod at cold sites.
     if (callee_method->has_compiled_code() && callee_method->instructions_size() > InlineSmallCode/4)
       return "already compiled into a medium method";
   }
   if (size > max_size) {
     if (max_size > C->max_inline_size())
       return "hot method too big";
     return "too big";
   }
   return NULL;
 }
 // negative filter: should send NOT be inlined?  returns NULL, ok to inline, or rejection msg
 const char* InlineTree::shouldNotInline(ciMethod *callee_method, WarmCallInfo* wci_result) const {
   // negative filter: should send NOT be inlined?  returns NULL (--> inline) or rejection msg
   if (!UseOldInlining) {
     const char* fail = NULL;
     if (callee_method->is_abstract())               fail = "abstract method";
     // note: we allow ik->is_abstract()
     if (!callee_method->holder()->is_initialized()) fail = "method holder not initialized";
     if (callee_method->is_native())                 fail = "native method";
     if (fail) {
       *wci_result = *(WarmCallInfo::always_cold());
       return fail;
     }
     if (callee_method->has_unloaded_classes_in_signature()) {
       wci_result->set_profit(wci_result->profit() * 0.1);
     }
     // don't inline exception code unless the top method belongs to an
     // exception class
     if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) {
       ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method();
       if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) {
         wci_result->set_profit(wci_result->profit() * 0.1);
       }
     }
     if (callee_method->has_compiled_code() && callee_method->instructions_size() > InlineSmallCode) {
       wci_result->set_profit(wci_result->profit() * 0.1);
       // %%% adjust wci_result->size()?
     }
     return NULL;
   }
   // First check all inlining restrictions which are required for correctness
   if (callee_method->is_abstract())               return "abstract method";
   // note: we allow ik->is_abstract()
   if (!callee_method->holder()->is_initialized()) return "method holder not initialized";
   if (callee_method->is_native())                 return "native method";
   if (callee_method->has_unloaded_classes_in_signature()) return "unloaded signature classes";
   if (callee_method->should_inline()) {
     // ignore heuristic controls on inlining
     return NULL;
   }
   // Now perform checks which are heuristic
   if( callee_method->has_compiled_code() && callee_method->instructions_size() > InlineSmallCode )
     return "already compiled into a big method";
   // don't inline exception code unless the top method belongs to an
   // exception class
   if (caller_tree() != NULL &&
       callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) {
     const InlineTree *top = this;
     while (top->caller_tree() != NULL) top = top->caller_tree();
     ciInstanceKlass* k = top->method()->holder();
     if (!k->is_subclass_of(C->env()->Throwable_klass()))
       return "exception method";
   }
   // use frequency-based objections only for non-trivial methods
   if (callee_method->code_size() <= MaxTrivialSize) return NULL;
   if (UseInterpreter && !CompileTheWorld) { // don't use counts with -Xcomp or CTW
     if (!callee_method->has_compiled_code() && !callee_method->was_executed_more_than(0)) return "never executed";
     if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, CompileThreshold >> 1))) return "executed < MinInliningThreshold times";
   }
   if (callee_method->should_not_inline()) {
     return "disallowed by CompilerOracle";
   }
   return NULL;
 }
 //-----------------------------try_to_inline-----------------------------------
 // return NULL if ok, reason for not inlining otherwise
 // Relocated from "InliningClosure::try_to_inline"
 const char* InlineTree::try_to_inline(ciMethod* callee_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) {
   ciMethod* caller_method = method();
   // Old algorithm had funny accumulating BC-size counters
   if (UseOldInlining && ClipInlining
       && (int)count_inline_bcs() >= DesiredMethodLimit) {
     return "size > DesiredMethodLimit";
   }
   const char *msg = NULL;
   if ((msg = shouldInline(callee_method, caller_bci, profile, wci_result)) != NULL) return msg;
   if ((msg = shouldNotInline(callee_method,                   wci_result)) != NULL) return msg;
   bool is_accessor = InlineAccessors && callee_method->is_accessor();
   // suppress a few checks for accessors and trivial methods
   if (!is_accessor && callee_method->code_size() > MaxTrivialSize) {
     // don't inline into giant methods
     if (C->unique() > (uint)NodeCountInliningCutoff) return "NodeCountInliningCutoff";
     // don't inline unreached call sites
     if (profile.count() == 0)                        return "call site not reached";
   }
   if (!C->do_inlining() && InlineAccessors && !is_accessor) return "not an accessor";
   if( inline_depth() > MaxInlineLevel )           return "inlining too deep";
   if( method() == callee_method &&
       inline_depth() > MaxRecursiveInlineLevel )  return "recursively inlining too deep";
   int size = callee_method->code_size();
   if (UseOldInlining && ClipInlining
       && (int)count_inline_bcs() + size >= DesiredMethodLimit) {
     return "size > DesiredMethodLimit";
   }
   // ok, inline this method
   return NULL;
 }
 //------------------------------pass_initial_checks----------------------------
 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) {
   ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL;
   // Check if a callee_method was suggested
   if( callee_method == NULL )            return false;
   // Check if klass of callee_method is loaded
   if( !callee_holder->is_loaded() )      return false;
   if( !callee_holder->is_initialized() ) return false;
   if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) {
     // Checks that constant pool's call site has been visited
     // stricter than callee_holder->is_initialized()
     ciBytecodeStream iter(caller_method);
     iter.force_bci(caller_bci);
     int index = iter.get_index_big();
     if( !caller_method->is_klass_loaded(index, true) ) {
       return false;
     }
     // Try to do constant pool resolution if running Xcomp
     Bytecodes::Code call_bc = iter.cur_bc();
     if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) {
       return false;
     }
   }
   // We will attempt to see if a class/field/etc got properly loaded.  If it
   // did not, it may attempt to throw an exception during our probing.  Catch
   // and ignore such exceptions and do not attempt to compile the method.
   if( callee_method->should_exclude() )  return false;
   return true;
 }
 #ifndef PRODUCT
 //------------------------------print_inlining---------------------------------
 // Really, the failure_msg can be a success message also.
 void InlineTree::print_inlining(ciMethod *callee_method, int caller_bci, const char *failure_msg) const {
   print_indent(inline_depth());
   tty->print("@ %d  ", caller_bci);
   if( callee_method ) callee_method->print_short_name();
   else                tty->print(" callee not monotonic or profiled");
   tty->print("  %s", (failure_msg ? failure_msg : "inline"));
   if( Verbose && callee_method ) {
     const InlineTree *top = this;
     while( top->caller_tree() != NULL ) { top = top->caller_tree(); }
     tty->print("  bcs: %d+%d  invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count());
   }
   tty->cr();
 }
 #endif
 //------------------------------ok_to_inline-----------------------------------
 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci) {
   assert(callee_method != NULL, "caller checks for optimized virtual!");
 #ifdef ASSERT
   // Make sure the incoming jvms has the same information content as me.
   // This means that we can eventually make this whole class AllStatic.
   if (jvms->caller() == NULL) {
     assert(_caller_jvms == NULL, "redundant instance state");
   } else {
     assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state");
   }
   assert(_method == jvms->method(), "redundant instance state");
 #endif
   const char *failure_msg   = NULL;
   int         caller_bci    = jvms->bci();
   ciMethod   *caller_method = jvms->method();
   if( !pass_initial_checks(caller_method, caller_bci, callee_method)) {
     if( PrintInlining ) {
       failure_msg = "failed_initial_checks";
       print_inlining( callee_method, caller_bci, failure_msg);
     }
     return NULL;
   }
   // Check if inlining policy says no.
   WarmCallInfo wci = *(initial_wci);
   failure_msg = try_to_inline(callee_method, caller_bci, profile, &wci);
   if (failure_msg != NULL && C->log() != NULL) {
     C->log()->begin_elem("inline_fail reason='");
     C->log()->text("%s", failure_msg);
     C->log()->end_elem("'");
   }
 #ifndef PRODUCT
   if (UseOldInlining && InlineWarmCalls
       && (PrintOpto || PrintOptoInlining || PrintInlining)) {
     bool cold = wci.is_cold();
     bool hot  = !cold && wci.is_hot();
     bool old_cold = (failure_msg != NULL);
     if (old_cold != cold || (Verbose || WizardMode)) {
       tty->print("   OldInlining= %4s : %s\n           WCI=",
                  old_cold ? "cold" : "hot", failure_msg ? failure_msg : "OK");
       wci.print();
     }
   }
 #endif
   if (UseOldInlining) {
     if (failure_msg == NULL)
       wci = *(WarmCallInfo::always_hot());
     else
       wci = *(WarmCallInfo::always_cold());
   }
   if (!InlineWarmCalls) {
     if (!wci.is_cold() && !wci.is_hot()) {
       // Do not inline the warm calls.
       wci = *(WarmCallInfo::always_cold());
     }
   }
   if (!wci.is_cold()) {
     // In -UseOldInlining, the failure_msg may also be a success message.
     if (failure_msg == NULL)  failure_msg = "inline (hot)";
     // Inline!
     if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg);
     if (UseOldInlining)
       build_inline_tree_for_callee(callee_method, jvms, caller_bci);
     if (InlineWarmCalls && !wci.is_hot())
       return new (C) WarmCallInfo(wci);  // copy to heap
     return WarmCallInfo::always_hot();
   }
   // Do not inline
   if (failure_msg == NULL)  failure_msg = "too cold to inline";
   if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg);
   return NULL;
 }
 //------------------------------compute_callee_frequency-----------------------
 float InlineTree::compute_callee_frequency( int caller_bci ) const {
   int count  = method()->interpreter_call_site_count(caller_bci);
   int invcnt = method()->interpreter_invocation_count();
   float freq = (float)count/(float)invcnt;
   // Call-site count / interpreter invocation count, scaled recursively.
   // Always between 0.0 and 1.0.  Represents the percentage of the method's
   // total execution time used at this call site.
   return freq;
 }
 //------------------------------build_inline_tree_for_callee-------------------
 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) {
   float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci);
   // Attempt inlining.
   InlineTree* old_ilt = callee_at(caller_bci, callee_method);
   if (old_ilt != NULL) {
     return old_ilt;
   }
   InlineTree *ilt = new InlineTree( C, this, callee_method, caller_jvms, caller_bci, recur_frequency );
   _subtrees.append( ilt );
   NOT_PRODUCT( _count_inlines += 1; )
   return ilt;
 }
 //---------------------------------------callee_at-----------------------------
 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const {
   for (int i = 0; i < _subtrees.length(); i++) {
     InlineTree* sub = _subtrees.at(i);
     if (sub->caller_bci() == bci && callee == sub->method()) {
       return sub;
     }
   }
   return NULL;
 }
 //------------------------------build_inline_tree_root-------------------------
 InlineTree *InlineTree::build_inline_tree_root() {
   Compile* C = Compile::current();
   // Root of inline tree
   InlineTree *ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F);
   return ilt;
 }
 //-------------------------find_subtree_from_root-----------------------------
 // Given a jvms, which determines a call chain from the root method,
 // find the corresponding inline tree.
 // Note: This method will be removed or replaced as InlineTree goes away.
 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee, bool create_if_not_found) {
   InlineTree* iltp = root;
   uint depth = jvms && jvms->has_method() ? jvms->depth() : 0;
   for (uint d = 1; d <= depth; d++) {
     JVMState* jvmsp  = jvms->of_depth(d);
     // Select the corresponding subtree for this bci.
     assert(jvmsp->method() == iltp->method(), "tree still in sync");
     ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method();
     InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee);
     if (!sub) {
       if (create_if_not_found && d == depth) {
         return iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci());
       }
       assert(sub != NULL, "should be a sub-ilt here");
       return NULL;
     }
     iltp = sub;
   }
   return iltp;
 }
 // ----------------------------------------------------------------------------
 #ifndef PRODUCT
 static void per_method_stats() {
   // Compute difference between this method's cumulative totals and old totals
   int explicit_null_checks_cur = explicit_null_checks_inserted - explicit_null_checks_inserted_old;
   int elided_null_checks_cur = explicit_null_checks_elided - explicit_null_checks_elided_old;
   // Print differences
   if( explicit_null_checks_cur )
     tty->print_cr("XXX Explicit NULL checks inserted: %d", explicit_null_checks_cur);
   if( elided_null_checks_cur )
     tty->print_cr("XXX Explicit NULL checks removed at parse time: %d", elided_null_checks_cur);
   // Store the current cumulative totals
   nodes_created_old = nodes_created;
   methods_parsed_old = methods_parsed;
   methods_seen_old = methods_seen;
   explicit_null_checks_inserted_old = explicit_null_checks_inserted;
   explicit_null_checks_elided_old = explicit_null_checks_elided;
 }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/bytecodeInfo.cpp@a61af66fc99e (annotated)

src/share/vm/opto/bytecodeInfo.cpp