jdk8-mips64-public/hotspot: src/share/vm/opto/callGenerator.cpp@82a980778b92 (annotated)

src/share/vm/opto/callGenerator.cpp@82a980778b92 (annotated)

src/share/vm/opto/callGenerator.cpp

Thu, 05 Feb 2009 11:42:10 -0800

author: never
date: Thu, 05 Feb 2009 11:42:10 -0800
changeset 979: 82a980778b92
parent 772: 9ee9cf798b59
child 1515: 7c57aead6d3e
permissions: -rw-r--r--

6793828: G1: invariant: queues are empty when activated
Reviewed-by: jrose, kvn

 /*
  * Copyright 2000-2008 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/_callGenerator.cpp.incl"
 CallGenerator::CallGenerator(ciMethod* method) {
   _method = method;
 }
 // Utility function.
 const TypeFunc* CallGenerator::tf() const {
   return TypeFunc::make(method());
 }
 //-----------------------------ParseGenerator---------------------------------
 // Internal class which handles all direct bytecode traversal.
 class ParseGenerator : public InlineCallGenerator {
 private:
   bool  _is_osr;
   float _expected_uses;
 public:
   ParseGenerator(ciMethod* method, float expected_uses, bool is_osr = false)
     : InlineCallGenerator(method)
   {
     _is_osr        = is_osr;
     _expected_uses = expected_uses;
     assert(can_parse(method, is_osr), "parse must be possible");
   }
   // Can we build either an OSR or a regular parser for this method?
   static bool can_parse(ciMethod* method, int is_osr = false);
   virtual bool      is_parse() const           { return true; }
   virtual JVMState* generate(JVMState* jvms);
   int is_osr() { return _is_osr; }
 };
 JVMState* ParseGenerator::generate(JVMState* jvms) {
   Compile* C = Compile::current();
   if (is_osr()) {
     // The JVMS for a OSR has a single argument (see its TypeFunc).
     assert(jvms->depth() == 1, "no inline OSR");
   }
   if (C->failing()) {
     return NULL;  // bailing out of the compile; do not try to parse
   }
   Parse parser(jvms, method(), _expected_uses);
   // Grab signature for matching/allocation
 #ifdef ASSERT
   if (parser.tf() != (parser.depth() == 1 ? C->tf() : tf())) {
     MutexLockerEx ml(Compile_lock, Mutex::_no_safepoint_check_flag);
     assert(C->env()->system_dictionary_modification_counter_changed(),
            "Must invalidate if TypeFuncs differ");
   }
 #endif
   GraphKit& exits = parser.exits();
   if (C->failing()) {
     while (exits.pop_exception_state() != NULL) ;
     return NULL;
   }
   assert(exits.jvms()->same_calls_as(jvms), "sanity");
   // Simply return the exit state of the parser,
   // augmented by any exceptional states.
   return exits.transfer_exceptions_into_jvms();
 }
 //---------------------------DirectCallGenerator------------------------------
 // Internal class which handles all out-of-line calls w/o receiver type checks.
 class DirectCallGenerator : public CallGenerator {
 public:
   DirectCallGenerator(ciMethod* method)
     : CallGenerator(method)
   {
   }
   virtual JVMState* generate(JVMState* jvms);
 };
 JVMState* DirectCallGenerator::generate(JVMState* jvms) {
   GraphKit kit(jvms);
   bool is_static = method()->is_static();
   address target = is_static ? SharedRuntime::get_resolve_static_call_stub()
                              : SharedRuntime::get_resolve_opt_virtual_call_stub();
   if (kit.C->log() != NULL) {
     kit.C->log()->elem("direct_call bci='%d'", jvms->bci());
   }
   CallStaticJavaNode *call = new (kit.C, tf()->domain()->cnt()) CallStaticJavaNode(tf(), target, method(), kit.bci());
   if (!is_static) {
     // Make an explicit receiver null_check as part of this call.
     // Since we share a map with the caller, his JVMS gets adjusted.
     kit.null_check_receiver(method());
     if (kit.stopped()) {
       // And dump it back to the caller, decorated with any exceptions:
       return kit.transfer_exceptions_into_jvms();
     }
     // Mark the call node as virtual, sort of:
     call->set_optimized_virtual(true);
   }
   kit.set_arguments_for_java_call(call);
   kit.set_edges_for_java_call(call);
   Node* ret = kit.set_results_for_java_call(call);
   kit.push_node(method()->return_type()->basic_type(), ret);
   return kit.transfer_exceptions_into_jvms();
 }
 class VirtualCallGenerator : public CallGenerator {
 private:
   int _vtable_index;
 public:
   VirtualCallGenerator(ciMethod* method, int vtable_index)
     : CallGenerator(method), _vtable_index(vtable_index)
   {
     assert(vtable_index == methodOopDesc::invalid_vtable_index ||
            vtable_index >= 0, "either invalid or usable");
   }
   virtual bool      is_virtual() const          { return true; }
   virtual JVMState* generate(JVMState* jvms);
 };
 //--------------------------VirtualCallGenerator------------------------------
 // Internal class which handles all out-of-line calls checking receiver type.
 JVMState* VirtualCallGenerator::generate(JVMState* jvms) {
   GraphKit kit(jvms);
   Node* receiver = kit.argument(0);
   if (kit.C->log() != NULL) {
     kit.C->log()->elem("virtual_call bci='%d'", jvms->bci());
   }
   // If the receiver is a constant null, do not torture the system
   // by attempting to call through it.  The compile will proceed
   // correctly, but may bail out in final_graph_reshaping, because
   // the call instruction will have a seemingly deficient out-count.
   // (The bailout says something misleading about an "infinite loop".)
   if (kit.gvn().type(receiver)->higher_equal(TypePtr::NULL_PTR)) {
     kit.inc_sp(method()->arg_size());  // restore arguments
     kit.uncommon_trap(Deoptimization::Reason_null_check,
                       Deoptimization::Action_none,
                       NULL, "null receiver");
     return kit.transfer_exceptions_into_jvms();
   }
   // Ideally we would unconditionally do a null check here and let it
   // be converted to an implicit check based on profile information.
   // However currently the conversion to implicit null checks in
   // Block::implicit_null_check() only looks for loads and stores, not calls.
   ciMethod *caller = kit.method();
   ciMethodData *caller_md = (caller == NULL) ? NULL : caller->method_data();
   if (!UseInlineCaches || !ImplicitNullChecks ||
        ((ImplicitNullCheckThreshold > 0) && caller_md &&
        (caller_md->trap_count(Deoptimization::Reason_null_check)
        >= (uint)ImplicitNullCheckThreshold))) {
     // Make an explicit receiver null_check as part of this call.
     // Since we share a map with the caller, his JVMS gets adjusted.
     receiver = kit.null_check_receiver(method());
     if (kit.stopped()) {
       // And dump it back to the caller, decorated with any exceptions:
       return kit.transfer_exceptions_into_jvms();
     }
   }
   assert(!method()->is_static(), "virtual call must not be to static");
   assert(!method()->is_final(), "virtual call should not be to final");
   assert(!method()->is_private(), "virtual call should not be to private");
   assert(_vtable_index == methodOopDesc::invalid_vtable_index || !UseInlineCaches,
          "no vtable calls if +UseInlineCaches ");
   address target = SharedRuntime::get_resolve_virtual_call_stub();
   // Normal inline cache used for call
   CallDynamicJavaNode *call = new (kit.C, tf()->domain()->cnt()) CallDynamicJavaNode(tf(), target, method(), _vtable_index, kit.bci());
   kit.set_arguments_for_java_call(call);
   kit.set_edges_for_java_call(call);
   Node* ret = kit.set_results_for_java_call(call);
   kit.push_node(method()->return_type()->basic_type(), ret);
   // Represent the effect of an implicit receiver null_check
   // as part of this call.  Since we share a map with the caller,
   // his JVMS gets adjusted.
   kit.cast_not_null(receiver);
   return kit.transfer_exceptions_into_jvms();
 }
 bool ParseGenerator::can_parse(ciMethod* m, int entry_bci) {
   // Certain methods cannot be parsed at all:
   if (!m->can_be_compiled())              return false;
   if (!m->has_balanced_monitors())        return false;
   if (m->get_flow_analysis()->failing())  return false;
   // (Methods may bail out for other reasons, after the parser is run.
   // We try to avoid this, but if forced, we must return (Node*)NULL.
   // The user of the CallGenerator must check for this condition.)
   return true;
 }
 CallGenerator* CallGenerator::for_inline(ciMethod* m, float expected_uses) {
   if (!ParseGenerator::can_parse(m))  return NULL;
   return new ParseGenerator(m, expected_uses);
 }
 // As a special case, the JVMS passed to this CallGenerator is
 // for the method execution already in progress, not just the JVMS
 // of the caller.  Thus, this CallGenerator cannot be mixed with others!
 CallGenerator* CallGenerator::for_osr(ciMethod* m, int osr_bci) {
   if (!ParseGenerator::can_parse(m, true))  return NULL;
   float past_uses = m->interpreter_invocation_count();
   float expected_uses = past_uses;
   return new ParseGenerator(m, expected_uses, true);
 }
 CallGenerator* CallGenerator::for_direct_call(ciMethod* m) {
   assert(!m->is_abstract(), "for_direct_call mismatch");
   return new DirectCallGenerator(m);
 }
 CallGenerator* CallGenerator::for_virtual_call(ciMethod* m, int vtable_index) {
   assert(!m->is_static(), "for_virtual_call mismatch");
   return new VirtualCallGenerator(m, vtable_index);
 }
 //---------------------------WarmCallGenerator--------------------------------
 // Internal class which handles initial deferral of inlining decisions.
 class WarmCallGenerator : public CallGenerator {
   WarmCallInfo*   _call_info;
   CallGenerator*  _if_cold;
   CallGenerator*  _if_hot;
   bool            _is_virtual;   // caches virtuality of if_cold
   bool            _is_inline;    // caches inline-ness of if_hot
 public:
   WarmCallGenerator(WarmCallInfo* ci,
                     CallGenerator* if_cold,
                     CallGenerator* if_hot)
     : CallGenerator(if_cold->method())
   {
     assert(method() == if_hot->method(), "consistent choices");
     _call_info  = ci;
     _if_cold    = if_cold;
     _if_hot     = if_hot;
     _is_virtual = if_cold->is_virtual();
     _is_inline  = if_hot->is_inline();
   }
   virtual bool      is_inline() const           { return _is_inline; }
   virtual bool      is_virtual() const          { return _is_virtual; }
   virtual bool      is_deferred() const         { return true; }
   virtual JVMState* generate(JVMState* jvms);
 };
 CallGenerator* CallGenerator::for_warm_call(WarmCallInfo* ci,
                                             CallGenerator* if_cold,
                                             CallGenerator* if_hot) {
   return new WarmCallGenerator(ci, if_cold, if_hot);
 }
 JVMState* WarmCallGenerator::generate(JVMState* jvms) {
   Compile* C = Compile::current();
   if (C->log() != NULL) {
     C->log()->elem("warm_call bci='%d'", jvms->bci());
   }
   jvms = _if_cold->generate(jvms);
   if (jvms != NULL) {
     Node* m = jvms->map()->control();
     if (m->is_CatchProj()) m = m->in(0);  else m = C->top();
     if (m->is_Catch())     m = m->in(0);  else m = C->top();
     if (m->is_Proj())      m = m->in(0);  else m = C->top();
     if (m->is_CallJava()) {
       _call_info->set_call(m->as_Call());
       _call_info->set_hot_cg(_if_hot);
 #ifndef PRODUCT
       if (PrintOpto || PrintOptoInlining) {
         tty->print_cr("Queueing for warm inlining at bci %d:", jvms->bci());
         tty->print("WCI: ");
         _call_info->print();
       }
 #endif
       _call_info->set_heat(_call_info->compute_heat());
       C->set_warm_calls(_call_info->insert_into(C->warm_calls()));
     }
   }
   return jvms;
 }
 void WarmCallInfo::make_hot() {
   Compile* C = Compile::current();
   // Replace the callnode with something better.
   CallJavaNode* call = this->call()->as_CallJava();
   ciMethod* method   = call->method();
   int       nargs    = method->arg_size();
   JVMState* jvms     = call->jvms()->clone_shallow(C);
   uint size = TypeFunc::Parms + MAX2(2, nargs);
   SafePointNode* map = new (C, size) SafePointNode(size, jvms);
   for (uint i1 = 0; i1 < (uint)(TypeFunc::Parms + nargs); i1++) {
     map->init_req(i1, call->in(i1));
   }
   jvms->set_map(map);
   jvms->set_offsets(map->req());
   jvms->set_locoff(TypeFunc::Parms);
   jvms->set_stkoff(TypeFunc::Parms);
   GraphKit kit(jvms);
   JVMState* new_jvms = _hot_cg->generate(kit.jvms());
   if (new_jvms == NULL)  return;  // no change
   if (C->failing())      return;
   kit.set_jvms(new_jvms);
   Node* res = C->top();
   int   res_size = method->return_type()->size();
   if (res_size != 0) {
     kit.inc_sp(-res_size);
     res = kit.argument(0);
   }
   GraphKit ekit(kit.combine_and_pop_all_exception_states()->jvms());
   // Replace the call:
   for (DUIterator i = call->outs(); call->has_out(i); i++) {
     Node* n = call->out(i);
     Node* nn = NULL;  // replacement
     if (n->is_Proj()) {
       ProjNode* nproj = n->as_Proj();
       assert(nproj->_con < (uint)(TypeFunc::Parms + (res_size ? 1 : 0)), "sane proj");
       if (nproj->_con == TypeFunc::Parms) {
         nn = res;
       } else {
         nn = kit.map()->in(nproj->_con);
       }
       if (nproj->_con == TypeFunc::I_O) {
         for (DUIterator j = nproj->outs(); nproj->has_out(j); j++) {
           Node* e = nproj->out(j);
           if (e->Opcode() == Op_CreateEx) {
             e->replace_by(ekit.argument(0));
           } else if (e->Opcode() == Op_Catch) {
             for (DUIterator k = e->outs(); e->has_out(k); k++) {
               CatchProjNode* p = e->out(j)->as_CatchProj();
               if (p->is_handler_proj()) {
                 p->replace_by(ekit.control());
               } else {
                 p->replace_by(kit.control());
               }
             }
           }
         }
       }
     }
     NOT_PRODUCT(if (!nn)  n->dump(2));
     assert(nn != NULL, "don't know what to do with this user");
     n->replace_by(nn);
   }
 }
 void WarmCallInfo::make_cold() {
   // No action:  Just dequeue.
 }
 //------------------------PredictedCallGenerator------------------------------
 // Internal class which handles all out-of-line calls checking receiver type.
 class PredictedCallGenerator : public CallGenerator {
   ciKlass*       _predicted_receiver;
   CallGenerator* _if_missed;
   CallGenerator* _if_hit;
   float          _hit_prob;
 public:
   PredictedCallGenerator(ciKlass* predicted_receiver,
                          CallGenerator* if_missed,
                          CallGenerator* if_hit, float hit_prob)
     : CallGenerator(if_missed->method())
   {
     // The call profile data may predict the hit_prob as extreme as 0 or 1.
     // Remove the extremes values from the range.
     if (hit_prob > PROB_MAX)   hit_prob = PROB_MAX;
     if (hit_prob < PROB_MIN)   hit_prob = PROB_MIN;
     _predicted_receiver = predicted_receiver;
     _if_missed          = if_missed;
     _if_hit             = if_hit;
     _hit_prob           = hit_prob;
   }
   virtual bool      is_virtual()   const    { return true; }
   virtual bool      is_inline()    const    { return _if_hit->is_inline(); }
   virtual bool      is_deferred()  const    { return _if_hit->is_deferred(); }
   virtual JVMState* generate(JVMState* jvms);
 };
 CallGenerator* CallGenerator::for_predicted_call(ciKlass* predicted_receiver,
                                                  CallGenerator* if_missed,
                                                  CallGenerator* if_hit,
                                                  float hit_prob) {
   return new PredictedCallGenerator(predicted_receiver, if_missed, if_hit, hit_prob);
 }
 JVMState* PredictedCallGenerator::generate(JVMState* jvms) {
   GraphKit kit(jvms);
   PhaseGVN& gvn = kit.gvn();
   // We need an explicit receiver null_check before checking its type.
   // We share a map with the caller, so his JVMS gets adjusted.
   Node* receiver = kit.argument(0);
   CompileLog* log = kit.C->log();
   if (log != NULL) {
     log->elem("predicted_call bci='%d' klass='%d'",
               jvms->bci(), log->identify(_predicted_receiver));
   }
   receiver = kit.null_check_receiver(method());
   if (kit.stopped()) {
     return kit.transfer_exceptions_into_jvms();
   }
   Node* exact_receiver = receiver;  // will get updated in place...
   Node* slow_ctl = kit.type_check_receiver(receiver,
                                            _predicted_receiver, _hit_prob,
                                            &exact_receiver);
   SafePointNode* slow_map = NULL;
   JVMState* slow_jvms;
   { PreserveJVMState pjvms(&kit);
     kit.set_control(slow_ctl);
     if (!kit.stopped()) {
       slow_jvms = _if_missed->generate(kit.sync_jvms());
       assert(slow_jvms != NULL, "miss path must not fail to generate");
       kit.add_exception_states_from(slow_jvms);
       kit.set_map(slow_jvms->map());
       if (!kit.stopped())
         slow_map = kit.stop();
     }
   }
   if (kit.stopped()) {
     // Instance exactly does not matches the desired type.
     kit.set_jvms(slow_jvms);
     return kit.transfer_exceptions_into_jvms();
   }
   // fall through if the instance exactly matches the desired type
   kit.replace_in_map(receiver, exact_receiver);
   // Make the hot call:
   JVMState* new_jvms = _if_hit->generate(kit.sync_jvms());
   if (new_jvms == NULL) {
     // Inline failed, so make a direct call.
     assert(_if_hit->is_inline(), "must have been a failed inline");
     CallGenerator* cg = CallGenerator::for_direct_call(_if_hit->method());
     new_jvms = cg->generate(kit.sync_jvms());
   }
   kit.add_exception_states_from(new_jvms);
   kit.set_jvms(new_jvms);
   // Need to merge slow and fast?
   if (slow_map == NULL) {
     // The fast path is the only path remaining.
     return kit.transfer_exceptions_into_jvms();
   }
   if (kit.stopped()) {
     // Inlined method threw an exception, so it's just the slow path after all.
     kit.set_jvms(slow_jvms);
     return kit.transfer_exceptions_into_jvms();
   }
   // Finish the diamond.
   kit.C->set_has_split_ifs(true); // Has chance for split-if optimization
   RegionNode* region = new (kit.C, 3) RegionNode(3);
   region->init_req(1, kit.control());
   region->init_req(2, slow_map->control());
   kit.set_control(gvn.transform(region));
   Node* iophi = PhiNode::make(region, kit.i_o(), Type::ABIO);
   iophi->set_req(2, slow_map->i_o());
   kit.set_i_o(gvn.transform(iophi));
   kit.merge_memory(slow_map->merged_memory(), region, 2);
   uint tos = kit.jvms()->stkoff() + kit.sp();
   uint limit = slow_map->req();
   for (uint i = TypeFunc::Parms; i < limit; i++) {
     // Skip unused stack slots; fast forward to monoff();
     if (i == tos) {
       i = kit.jvms()->monoff();
       if( i >= limit ) break;
     }
     Node* m = kit.map()->in(i);
     Node* n = slow_map->in(i);
     if (m != n) {
       const Type* t = gvn.type(m)->meet(gvn.type(n));
       Node* phi = PhiNode::make(region, m, t);
       phi->set_req(2, n);
       kit.map()->set_req(i, gvn.transform(phi));
     }
   }
   return kit.transfer_exceptions_into_jvms();
 }
 //-------------------------UncommonTrapCallGenerator-----------------------------
 // Internal class which handles all out-of-line calls checking receiver type.
 class UncommonTrapCallGenerator : public CallGenerator {
   Deoptimization::DeoptReason _reason;
   Deoptimization::DeoptAction _action;
 public:
   UncommonTrapCallGenerator(ciMethod* m,
                             Deoptimization::DeoptReason reason,
                             Deoptimization::DeoptAction action)
     : CallGenerator(m)
   {
     _reason = reason;
     _action = action;
   }
   virtual bool      is_virtual() const          { ShouldNotReachHere(); return false; }
   virtual bool      is_trap() const             { return true; }
   virtual JVMState* generate(JVMState* jvms);
 };
 CallGenerator*
 CallGenerator::for_uncommon_trap(ciMethod* m,
                                  Deoptimization::DeoptReason reason,
                                  Deoptimization::DeoptAction action) {
   return new UncommonTrapCallGenerator(m, reason, action);
 }
 JVMState* UncommonTrapCallGenerator::generate(JVMState* jvms) {
   GraphKit kit(jvms);
   // Take the trap with arguments pushed on the stack.  (Cf. null_check_receiver).
   int nargs = method()->arg_size();
   kit.inc_sp(nargs);
   assert(nargs <= kit.sp() && kit.sp() <= jvms->stk_size(), "sane sp w/ args pushed");
   if (_reason == Deoptimization::Reason_class_check &&
       _action == Deoptimization::Action_maybe_recompile) {
     // Temp fix for 6529811
     // Don't allow uncommon_trap to override our decision to recompile in the event
     // of a class cast failure for a monomorphic call as it will never let us convert
     // the call to either bi-morphic or megamorphic and can lead to unc-trap loops
     bool keep_exact_action = true;
     kit.uncommon_trap(_reason, _action, NULL, "monomorphic vcall checkcast", false, keep_exact_action);
   } else {
     kit.uncommon_trap(_reason, _action);
   }
   return kit.transfer_exceptions_into_jvms();
 }
 // (Note:  Moved hook_up_call to GraphKit::set_edges_for_java_call.)
 // (Node:  Merged hook_up_exits into ParseGenerator::generate.)
 #define NODES_OVERHEAD_PER_METHOD (30.0)
 #define NODES_PER_BYTECODE (9.5)
 void WarmCallInfo::init(JVMState* call_site, ciMethod* call_method, ciCallProfile& profile, float prof_factor) {
   int call_count = profile.count();
   int code_size = call_method->code_size();
   // Expected execution count is based on the historical count:
   _count = call_count < 0 ? 1 : call_site->method()->scale_count(call_count, prof_factor);
   // Expected profit from inlining, in units of simple call-overheads.
   _profit = 1.0;
   // Expected work performed by the call in units of call-overheads.
   // %%% need an empirical curve fit for "work" (time in call)
   float bytecodes_per_call = 3;
   _work = 1.0 + code_size / bytecodes_per_call;
   // Expected size of compilation graph:
   // -XX:+PrintParseStatistics once reported:
   //  Methods seen: 9184  Methods parsed: 9184  Nodes created: 1582391
   //  Histogram of 144298 parsed bytecodes:
   // %%% Need an better predictor for graph size.
   _size = NODES_OVERHEAD_PER_METHOD + (NODES_PER_BYTECODE * code_size);
 }
 // is_cold:  Return true if the node should never be inlined.
 // This is true if any of the key metrics are extreme.
 bool WarmCallInfo::is_cold() const {
   if (count()  <  WarmCallMinCount)        return true;
   if (profit() <  WarmCallMinProfit)       return true;
   if (work()   >  WarmCallMaxWork)         return true;
   if (size()   >  WarmCallMaxSize)         return true;
   return false;
 }
 // is_hot:  Return true if the node should be inlined immediately.
 // This is true if any of the key metrics are extreme.
 bool WarmCallInfo::is_hot() const {
   assert(!is_cold(), "eliminate is_cold cases before testing is_hot");
   if (count()  >= HotCallCountThreshold)   return true;
   if (profit() >= HotCallProfitThreshold)  return true;
   if (work()   <= HotCallTrivialWork)      return true;
   if (size()   <= HotCallTrivialSize)      return true;
   return false;
 }
 // compute_heat:
 float WarmCallInfo::compute_heat() const {
   assert(!is_cold(), "compute heat only on warm nodes");
   assert(!is_hot(),  "compute heat only on warm nodes");
   int min_size = MAX2(0,   (int)HotCallTrivialSize);
   int max_size = MIN2(500, (int)WarmCallMaxSize);
   float method_size = (size() - min_size) / MAX2(1, max_size - min_size);
   float size_factor;
   if      (method_size < 0.05)  size_factor = 4;   // 2 sigmas better than avg.
   else if (method_size < 0.15)  size_factor = 2;   // 1 sigma better than avg.
   else if (method_size < 0.5)   size_factor = 1;   // better than avg.
   else                          size_factor = 0.5; // worse than avg.
   return (count() * profit() * size_factor);
 }
 bool WarmCallInfo::warmer_than(WarmCallInfo* that) {
   assert(this != that, "compare only different WCIs");
   assert(this->heat() != 0 && that->heat() != 0, "call compute_heat 1st");
   if (this->heat() > that->heat())   return true;
   if (this->heat() < that->heat())   return false;
   assert(this->heat() == that->heat(), "no NaN heat allowed");
   // Equal heat.  Break the tie some other way.
   if (!this->call() || !that->call())  return (address)this > (address)that;
   return this->call()->_idx > that->call()->_idx;
 }
 //#define UNINIT_NEXT ((WarmCallInfo*)badAddress)
 #define UNINIT_NEXT ((WarmCallInfo*)NULL)
 WarmCallInfo* WarmCallInfo::insert_into(WarmCallInfo* head) {
   assert(next() == UNINIT_NEXT, "not yet on any list");
   WarmCallInfo* prev_p = NULL;
   WarmCallInfo* next_p = head;
   while (next_p != NULL && next_p->warmer_than(this)) {
     prev_p = next_p;
     next_p = prev_p->next();
   }
   // Install this between prev_p and next_p.
   this->set_next(next_p);
   if (prev_p == NULL)
     head = this;
   else
     prev_p->set_next(this);
   return head;
 }
 WarmCallInfo* WarmCallInfo::remove_from(WarmCallInfo* head) {
   WarmCallInfo* prev_p = NULL;
   WarmCallInfo* next_p = head;
   while (next_p != this) {
     assert(next_p != NULL, "this must be in the list somewhere");
     prev_p = next_p;
     next_p = prev_p->next();
   }
   next_p = this->next();
   debug_only(this->set_next(UNINIT_NEXT));
   // Remove this from between prev_p and next_p.
   if (prev_p == NULL)
     head = next_p;
   else
     prev_p->set_next(next_p);
   return head;
 }
 WarmCallInfo* WarmCallInfo::_always_hot  = NULL;
 WarmCallInfo* WarmCallInfo::_always_cold = NULL;
 WarmCallInfo* WarmCallInfo::always_hot() {
   if (_always_hot == NULL) {
     static double bits[sizeof(WarmCallInfo) / sizeof(double) + 1] = {0};
     WarmCallInfo* ci = (WarmCallInfo*) bits;
     ci->_profit = ci->_count = MAX_VALUE();
     ci->_work   = ci->_size  = MIN_VALUE();
     _always_hot = ci;
   }
   assert(_always_hot->is_hot(), "must always be hot");
   return _always_hot;
 }
 WarmCallInfo* WarmCallInfo::always_cold() {
   if (_always_cold == NULL) {
     static double bits[sizeof(WarmCallInfo) / sizeof(double) + 1] = {0};
     WarmCallInfo* ci = (WarmCallInfo*) bits;
     ci->_profit = ci->_count = MIN_VALUE();
     ci->_work   = ci->_size  = MAX_VALUE();
     _always_cold = ci;
   }
   assert(_always_cold->is_cold(), "must always be cold");
   return _always_cold;
 }
 #ifndef PRODUCT
 void WarmCallInfo::print() const {
   tty->print("%s : C=%6.1f P=%6.1f W=%6.1f S=%6.1f H=%6.1f -> %p",
              is_cold() ? "cold" : is_hot() ? "hot " : "warm",
              count(), profit(), work(), size(), compute_heat(), next());
   tty->cr();
   if (call() != NULL)  call()->dump();
 }
 void print_wci(WarmCallInfo* ci) {
   ci->print();
 }
 void WarmCallInfo::print_all() const {
   for (const WarmCallInfo* p = this; p != NULL; p = p->next())
     p->print();
 }
 int WarmCallInfo::count_all() const {
   int cnt = 0;
   for (const WarmCallInfo* p = this; p != NULL; p = p->next())
     cnt++;
   return cnt;
 }
 #endif //PRODUCT

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/callGenerator.cpp@82a980778b92 (annotated)

src/share/vm/opto/callGenerator.cpp