/* * Copyright (c) 2000, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "ci/bcEscapeAnalyzer.hpp" #include "ci/ciCallSite.hpp" #include "ci/ciCPCache.hpp" #include "ci/ciMethodHandle.hpp" #include "classfile/javaClasses.hpp" #include "compiler/compileLog.hpp" #include "opto/addnode.hpp" #include "opto/callGenerator.hpp" #include "opto/callnode.hpp" #include "opto/cfgnode.hpp" #include "opto/connode.hpp" #include "opto/parse.hpp" #include "opto/rootnode.hpp" #include "opto/runtime.hpp" #include "opto/subnode.hpp" 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(InlineTree::check_can_parse(method) == NULL, "parse must be possible"); } 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 { private: CallStaticJavaNode* _call_node; // Force separate memory and I/O projections for the exceptional // paths to facilitate late inlinig. bool _separate_io_proj; public: DirectCallGenerator(ciMethod* method, bool separate_io_proj) : CallGenerator(method), _separate_io_proj(separate_io_proj) { } virtual JVMState* generate(JVMState* jvms); CallStaticJavaNode* call_node() const { return _call_node; } }; 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()); _call_node = call; // Save the call node in case we need it later 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); if (method()->is_method_handle_invoke()) { call->set_method_handle_invoke(true); } } kit.set_arguments_for_java_call(call); kit.set_edges_for_java_call(call, false, _separate_io_proj); Node* ret = kit.set_results_for_java_call(call, _separate_io_proj); kit.push_node(method()->return_type()->basic_type(), ret); return kit.transfer_exceptions_into_jvms(); } //---------------------------DynamicCallGenerator----------------------------- // Internal class which handles all out-of-line invokedynamic calls. class DynamicCallGenerator : public CallGenerator { public: DynamicCallGenerator(ciMethod* method) : CallGenerator(method) { } virtual JVMState* generate(JVMState* jvms); }; JVMState* DynamicCallGenerator::generate(JVMState* jvms) { GraphKit kit(jvms); Compile* C = kit.C; PhaseGVN& gvn = kit.gvn(); if (C->log() != NULL) { C->log()->elem("dynamic_call bci='%d'", jvms->bci()); } // Get the constant pool cache from the caller class. ciMethod* caller_method = jvms->method(); ciBytecodeStream str(caller_method); str.force_bci(jvms->bci()); // Set the stream to the invokedynamic bci. assert(str.cur_bc() == Bytecodes::_invokedynamic, "wrong place to issue a dynamic call!"); ciCPCache* cpcache = str.get_cpcache(); // Get the offset of the CallSite from the constant pool cache // pointer. int index = str.get_method_index(); size_t call_site_offset = cpcache->get_f1_offset(index); // Load the CallSite object from the constant pool cache. const TypeOopPtr* cpcache_type = TypeOopPtr::make_from_constant(cpcache); // returns TypeAryPtr of type T_OBJECT const TypeOopPtr* call_site_type = TypeOopPtr::make_from_klass(C->env()->CallSite_klass()); Node* cpcache_adr = kit.makecon(cpcache_type); Node* call_site_adr = kit.basic_plus_adr(cpcache_adr, call_site_offset); // The oops in the constant pool cache are not compressed; load then as raw pointers. Node* call_site = kit.make_load(kit.control(), call_site_adr, call_site_type, T_ADDRESS, Compile::AliasIdxRaw); // Load the target MethodHandle from the CallSite object. const TypeOopPtr* target_type = TypeOopPtr::make_from_klass(C->env()->MethodHandle_klass()); Node* target_mh_adr = kit.basic_plus_adr(call_site, java_lang_invoke_CallSite::target_offset_in_bytes()); Node* target_mh = kit.make_load(kit.control(), target_mh_adr, target_type, T_OBJECT); address resolve_stub = SharedRuntime::get_resolve_opt_virtual_call_stub(); CallStaticJavaNode* call = new (C, tf()->domain()->cnt()) CallStaticJavaNode(tf(), resolve_stub, method(), kit.bci()); // invokedynamic is treated as an optimized invokevirtual. call->set_optimized_virtual(true); // Take extra care (in the presence of argument motion) not to trash the SP: call->set_method_handle_invoke(true); // Pass the target MethodHandle as first argument and shift the // other arguments. call->init_req(0 + TypeFunc::Parms, target_mh); uint nargs = call->method()->arg_size(); for (uint i = 1; i < nargs; i++) { Node* arg = kit.argument(i - 1); call->init_req(i + TypeFunc::Parms, arg); } 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(); } //--------------------------VirtualCallGenerator------------------------------ // Internal class which handles all out-of-line calls checking receiver type. 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); }; 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(); } CallGenerator* CallGenerator::for_inline(ciMethod* m, float expected_uses) { if (InlineTree::check_can_parse(m) != NULL) 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 (InlineTree::check_can_parse(m) != NULL) 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, bool separate_io_proj) { assert(!m->is_abstract(), "for_direct_call mismatch"); return new DirectCallGenerator(m, separate_io_proj); } CallGenerator* CallGenerator::for_virtual_call(ciMethod* m, int vtable_index) { assert(!m->is_static(), "for_virtual_call mismatch"); assert(!m->is_method_handle_invoke(), "should be a direct call"); return new VirtualCallGenerator(m, vtable_index); } CallGenerator* CallGenerator::for_dynamic_call(ciMethod* m) { assert(m->is_method_handle_invoke() || m->is_method_handle_adapter(), "for_dynamic_call mismatch"); return new DynamicCallGenerator(m); } // Allow inlining decisions to be delayed class LateInlineCallGenerator : public DirectCallGenerator { CallGenerator* _inline_cg; public: LateInlineCallGenerator(ciMethod* method, CallGenerator* inline_cg) : DirectCallGenerator(method, true), _inline_cg(inline_cg) {} virtual bool is_late_inline() const { return true; } // Convert the CallStaticJava into an inline virtual void do_late_inline(); JVMState* generate(JVMState* jvms) { // Record that this call site should be revisited once the main // parse is finished. Compile::current()->add_late_inline(this); // Emit the CallStaticJava and request separate projections so // that the late inlining logic can distinguish between fall // through and exceptional uses of the memory and io projections // as is done for allocations and macro expansion. return DirectCallGenerator::generate(jvms); } }; void LateInlineCallGenerator::do_late_inline() { // Can't inline it if (call_node() == NULL || call_node()->outcnt() == 0 || call_node()->in(0) == NULL || call_node()->in(0)->is_top()) return; CallStaticJavaNode* call = call_node(); // Make a clone of the JVMState that appropriate to use for driving a parse Compile* C = Compile::current(); JVMState* jvms = call->jvms()->clone_shallow(C); uint size = call->req(); SafePointNode* map = new (C, size) SafePointNode(size, jvms); for (uint i1 = 0; i1 < size; i1++) { map->init_req(i1, call->in(i1)); } // Make sure the state is a MergeMem for parsing. if (!map->in(TypeFunc::Memory)->is_MergeMem()) { map->set_req(TypeFunc::Memory, MergeMemNode::make(C, map->in(TypeFunc::Memory))); } // Make enough space for the expression stack and transfer the incoming arguments int nargs = method()->arg_size(); jvms->set_map(map); map->ensure_stack(jvms, jvms->method()->max_stack()); if (nargs > 0) { for (int i1 = 0; i1 < nargs; i1++) { map->set_req(i1 + jvms->argoff(), call->in(TypeFunc::Parms + i1)); } } CompileLog* log = C->log(); if (log != NULL) { log->head("late_inline method='%d'", log->identify(method())); JVMState* p = jvms; while (p != NULL) { log->elem("jvms bci='%d' method='%d'", p->bci(), log->identify(p->method())); p = p->caller(); } log->tail("late_inline"); } // Setup default node notes to be picked up by the inlining Node_Notes* old_nn = C->default_node_notes(); if (old_nn != NULL) { Node_Notes* entry_nn = old_nn->clone(C); entry_nn->set_jvms(jvms); C->set_default_node_notes(entry_nn); } // Now perform the inling using the synthesized JVMState JVMState* new_jvms = _inline_cg->generate(jvms); if (new_jvms == NULL) return; // no change if (C->failing()) return; // Capture any exceptional control flow GraphKit kit(new_jvms); // Find the result object Node* result = C->top(); int result_size = method()->return_type()->size(); if (result_size != 0 && !kit.stopped()) { result = (result_size == 1) ? kit.pop() : kit.pop_pair(); } kit.replace_call(call, result); } CallGenerator* CallGenerator::for_late_inline(ciMethod* method, CallGenerator* inline_cg) { return new LateInlineCallGenerator(method, inline_cg); } //---------------------------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() { Unimplemented(); } 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()); if (kit.failing()) return NULL; // might happen because of NodeCountInliningCutoff assert(slow_jvms != NULL, "must be"); 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(); } //------------------------PredictedDynamicCallGenerator----------------------- // Internal class which handles all out-of-line calls checking receiver type. class PredictedDynamicCallGenerator : public CallGenerator { ciMethodHandle* _predicted_method_handle; CallGenerator* _if_missed; CallGenerator* _if_hit; float _hit_prob; public: PredictedDynamicCallGenerator(ciMethodHandle* predicted_method_handle, CallGenerator* if_missed, CallGenerator* if_hit, float hit_prob) : CallGenerator(if_missed->method()), _predicted_method_handle(predicted_method_handle), _if_missed(if_missed), _if_hit(if_hit), _hit_prob(hit_prob) {} 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_dynamic_call(ciMethodHandle* predicted_method_handle, CallGenerator* if_missed, CallGenerator* if_hit, float hit_prob) { return new PredictedDynamicCallGenerator(predicted_method_handle, if_missed, if_hit, hit_prob); } CallGenerator* CallGenerator::for_method_handle_call(Node* method_handle, JVMState* jvms, ciMethod* caller, ciMethod* callee, ciCallProfile profile) { assert(callee->is_method_handle_invoke() || callee->is_method_handle_adapter(), "for_method_handle_call mismatch"); CallGenerator* cg = CallGenerator::for_method_handle_inline(method_handle, jvms, caller, callee, profile); if (cg != NULL) return cg; return CallGenerator::for_direct_call(callee); } CallGenerator* CallGenerator::for_method_handle_inline(Node* method_handle, JVMState* jvms, ciMethod* caller, ciMethod* callee, ciCallProfile profile) { if (method_handle->Opcode() == Op_ConP) { const TypeOopPtr* oop_ptr = method_handle->bottom_type()->is_oopptr(); ciObject* const_oop = oop_ptr->const_oop(); ciMethodHandle* method_handle = const_oop->as_method_handle(); // Set the callee to have access to the class and signature in // the MethodHandleCompiler. method_handle->set_callee(callee); method_handle->set_caller(caller); method_handle->set_call_profile(profile); // Get an adapter for the MethodHandle. ciMethod* target_method = method_handle->get_method_handle_adapter(); if (target_method != NULL) { CallGenerator* cg = Compile::current()->call_generator(target_method, -1, false, jvms, true, PROB_ALWAYS); if (cg != NULL && cg->is_inline()) return cg; } } else if (method_handle->Opcode() == Op_Phi && method_handle->req() == 3 && method_handle->in(1)->Opcode() == Op_ConP && method_handle->in(2)->Opcode() == Op_ConP) { float prob = PROB_FAIR; Node* meth_region = method_handle->in(0); if (meth_region->is_Region() && meth_region->in(1)->is_Proj() && meth_region->in(2)->is_Proj() && meth_region->in(1)->in(0) == meth_region->in(2)->in(0) && meth_region->in(1)->in(0)->is_If()) { // If diamond, so grab the probability of the test to drive the inlining below prob = meth_region->in(1)->in(0)->as_If()->_prob; if (meth_region->in(1)->is_IfTrue()) { prob = 1 - prob; } } // selectAlternative idiom merging two constant MethodHandles. // Generate a guard so that each can be inlined. We might want to // do more inputs at later point but this gets the most common // case. CallGenerator* cg1 = for_method_handle_call(method_handle->in(1), jvms, caller, callee, profile.rescale(1.0 - prob)); CallGenerator* cg2 = for_method_handle_call(method_handle->in(2), jvms, caller, callee, profile.rescale(prob)); if (cg1 != NULL && cg2 != NULL) { const TypeOopPtr* oop_ptr = method_handle->in(1)->bottom_type()->is_oopptr(); ciObject* const_oop = oop_ptr->const_oop(); ciMethodHandle* mh = const_oop->as_method_handle(); return new PredictedDynamicCallGenerator(mh, cg2, cg1, prob); } } return NULL; } CallGenerator* CallGenerator::for_invokedynamic_call(JVMState* jvms, ciMethod* caller, ciMethod* callee, ciCallProfile profile) { assert(callee->is_method_handle_invoke() || callee->is_method_handle_adapter(), "for_invokedynamic_call mismatch"); // Get the CallSite object. ciBytecodeStream str(caller); str.force_bci(jvms->bci()); // Set the stream to the invokedynamic bci. ciCallSite* call_site = str.get_call_site(); CallGenerator* cg = CallGenerator::for_invokedynamic_inline(call_site, jvms, caller, callee, profile); if (cg != NULL) return cg; return CallGenerator::for_dynamic_call(callee); } CallGenerator* CallGenerator::for_invokedynamic_inline(ciCallSite* call_site, JVMState* jvms, ciMethod* caller, ciMethod* callee, ciCallProfile profile) { ciMethodHandle* method_handle = call_site->get_target(); // Set the callee to have access to the class and signature in the // MethodHandleCompiler. method_handle->set_callee(callee); method_handle->set_caller(caller); method_handle->set_call_profile(profile); // Get an adapter for the MethodHandle. ciMethod* target_method = method_handle->get_invokedynamic_adapter(); if (target_method != NULL) { Compile *C = Compile::current(); CallGenerator* cg = C->call_generator(target_method, -1, false, jvms, true, PROB_ALWAYS); if (cg != NULL && cg->is_inline()) { // Add a dependence for invalidation of the optimization. if (!call_site->is_constant_call_site()) { C->dependencies()->assert_call_site_target_value(call_site, method_handle); } return cg; } } return NULL; } JVMState* PredictedDynamicCallGenerator::generate(JVMState* jvms) { GraphKit kit(jvms); Compile* C = kit.C; PhaseGVN& gvn = kit.gvn(); CompileLog* log = C->log(); if (log != NULL) { log->elem("predicted_dynamic_call bci='%d'", jvms->bci()); } const TypeOopPtr* predicted_mh_ptr = TypeOopPtr::make_from_constant(_predicted_method_handle, true); Node* predicted_mh = kit.makecon(predicted_mh_ptr); Node* bol = NULL; int bc = jvms->method()->java_code_at_bci(jvms->bci()); if (bc != Bytecodes::_invokedynamic) { // This is the selectAlternative idiom for guardWithTest or // similar idioms. Node* receiver = kit.argument(0); // Check if the MethodHandle is the expected one Node* cmp = gvn.transform(new (C, 3) CmpPNode(receiver, predicted_mh)); bol = gvn.transform(new (C, 2) BoolNode(cmp, BoolTest::eq) ); } else { // Get the constant pool cache from the caller class. ciMethod* caller_method = jvms->method(); ciBytecodeStream str(caller_method); str.force_bci(jvms->bci()); // Set the stream to the invokedynamic bci. ciCPCache* cpcache = str.get_cpcache(); // Get the offset of the CallSite from the constant pool cache // pointer. int index = str.get_method_index(); size_t call_site_offset = cpcache->get_f1_offset(index); // Load the CallSite object from the constant pool cache. const TypeOopPtr* cpcache_type = TypeOopPtr::make_from_constant(cpcache); // returns TypeAryPtr of type T_OBJECT const TypeOopPtr* call_site_type = TypeOopPtr::make_from_klass(C->env()->CallSite_klass()); Node* cpcache_adr = kit.makecon(cpcache_type); Node* call_site_adr = kit.basic_plus_adr(cpcache_adr, call_site_offset); // The oops in the constant pool cache are not compressed; load then as raw pointers. Node* call_site = kit.make_load(kit.control(), call_site_adr, call_site_type, T_ADDRESS, Compile::AliasIdxRaw); // Load the target MethodHandle from the CallSite object. const TypeOopPtr* target_type = TypeOopPtr::make_from_klass(C->env()->MethodHandle_klass()); Node* target_adr = kit.basic_plus_adr(call_site, call_site, java_lang_invoke_CallSite::target_offset_in_bytes()); Node* target_mh = kit.make_load(kit.control(), target_adr, target_type, T_OBJECT); // Check if the MethodHandle is still the same. Node* cmp = gvn.transform(new (C, 3) CmpPNode(target_mh, predicted_mh)); bol = gvn.transform(new (C, 2) BoolNode(cmp, BoolTest::eq) ); } IfNode* iff = kit.create_and_xform_if(kit.control(), bol, _hit_prob, COUNT_UNKNOWN); kit.set_control( gvn.transform(new (C, 1) IfTrueNode (iff))); Node* slow_ctl = gvn.transform(new (C, 1) IfFalseNode(iff)); 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()); if (kit.failing()) return NULL; // might happen because of NodeCountInliningCutoff assert(slow_jvms != NULL, "must be"); 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(); } // 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 (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(WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE(), WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE()); WarmCallInfo WarmCallInfo::_always_cold(WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE(), WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE()); WarmCallInfo* WarmCallInfo::always_hot() { assert(_always_hot.is_hot(), "must always be hot"); return &_always_hot; } WarmCallInfo* WarmCallInfo::always_cold() { 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