author | pliden |
Wed, 23 Jan 2019 08:55:09 +0100 | |
changeset 53439 | 4b42f828e0c3 |
parent 53223 | df6cbf676c70 |
child 54327 | a4d19817609c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2019, 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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#ifndef SHARE_GC_Z_C2_ZBARRIERSETC2_HPP |
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#define SHARE_GC_Z_C2_ZBARRIERSETC2_HPP |
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#include "gc/shared/c2/barrierSetC2.hpp" |
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#include "memory/allocation.hpp" |
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#include "opto/node.hpp" |
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#include "utilities/growableArray.hpp" |
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class LoadBarrierNode : public MultiNode { |
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private: |
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bool _weak; // On strong or weak oop reference |
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bool _writeback; // Controls if the barrier writes the healed oop back to memory |
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// A swap on a memory location must never write back the healed oop |
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bool _oop_reload_allowed; // Controls if the barrier are allowed to reload the oop from memory |
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// before healing, otherwise both the oop and the address must be |
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// passed to the barrier from the oop |
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static bool is_dominator(PhaseIdealLoop* phase, bool linear_only, Node *d, Node *n); |
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void push_dominated_barriers(PhaseIterGVN* igvn) const; |
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public: |
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enum { |
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Control, |
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Memory, |
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Oop, |
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Address, |
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Number_of_Outputs = Address, |
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Similar, |
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Number_of_Inputs |
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}; |
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LoadBarrierNode(Compile* C, |
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Node* c, |
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Node* mem, |
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Node* val, |
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Node* adr, |
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bool weak, |
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bool writeback, |
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bool oop_reload_allowed); |
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virtual int Opcode() const; |
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virtual uint size_of() const; |
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virtual uint cmp(const Node& n) const; |
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virtual const Type *bottom_type() const; |
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virtual const TypePtr* adr_type() const; |
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virtual const Type *Value(PhaseGVN *phase) const; |
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virtual Node *Identity(PhaseGVN *phase); |
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
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virtual uint match_edge(uint idx) const; |
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LoadBarrierNode* has_dominating_barrier(PhaseIdealLoop* phase, |
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bool linear_only, |
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bool look_for_similar); |
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void fix_similar_in_uses(PhaseIterGVN* igvn); |
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bool has_true_uses() const; |
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bool can_be_eliminated() const { |
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return !in(Similar)->is_top(); |
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} |
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bool is_weak() const { |
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return _weak; |
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} |
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bool is_writeback() const { |
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return _writeback; |
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} |
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bool oop_reload_allowed() const { |
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return _oop_reload_allowed; |
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} |
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}; |
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class LoadBarrierSlowRegNode : public LoadPNode { |
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public: |
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LoadBarrierSlowRegNode(Node *c, |
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Node *mem, |
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Node *adr, |
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const TypePtr *at, |
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const TypePtr* t, |
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MemOrd mo, |
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ControlDependency control_dependency = DependsOnlyOnTest) : |
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LoadPNode(c, mem, adr, at, t, mo, control_dependency) { |
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init_class_id(Class_LoadBarrierSlowReg); |
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} |
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virtual const char * name() { |
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return "LoadBarrierSlowRegNode"; |
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} |
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { |
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return NULL; |
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} |
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virtual int Opcode() const; |
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}; |
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class LoadBarrierWeakSlowRegNode : public LoadPNode { |
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public: |
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LoadBarrierWeakSlowRegNode(Node *c, |
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Node *mem, |
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Node *adr, |
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const TypePtr *at, |
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const TypePtr* t, |
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MemOrd mo, |
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ControlDependency control_dependency = DependsOnlyOnTest) : |
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LoadPNode(c, mem, adr, at, t, mo, control_dependency) { |
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init_class_id(Class_LoadBarrierWeakSlowReg); |
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} |
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virtual const char * name() { |
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return "LoadBarrierWeakSlowRegNode"; |
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} |
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { |
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return NULL; |
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} |
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virtual int Opcode() const; |
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}; |
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class ZBarrierSetC2State : public ResourceObj { |
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private: |
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// List of load barrier nodes which need to be expanded before matching |
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GrowableArray<LoadBarrierNode*>* _load_barrier_nodes; |
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public: |
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ZBarrierSetC2State(Arena* comp_arena); |
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int load_barrier_count() const; |
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void add_load_barrier_node(LoadBarrierNode* n); |
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void remove_load_barrier_node(LoadBarrierNode* n); |
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LoadBarrierNode* load_barrier_node(int idx) const; |
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}; |
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class ZBarrierSetC2 : public BarrierSetC2 { |
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private: |
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ZBarrierSetC2State* state() const; |
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Node* make_cas_loadbarrier(C2AtomicParseAccess& access) const; |
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Node* make_cmpx_loadbarrier(C2AtomicParseAccess& access) const; |
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void expand_loadbarrier_basic(PhaseMacroExpand* phase, LoadBarrierNode *barrier) const; |
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void expand_loadbarrier_node(PhaseMacroExpand* phase, LoadBarrierNode* barrier) const; |
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void expand_loadbarrier_optimized(PhaseMacroExpand* phase, LoadBarrierNode *barrier) const; |
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const TypeFunc* load_barrier_Type() const; |
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#ifdef ASSERT |
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void verify_gc_barriers(bool post_parse) const; |
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#endif |
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protected: |
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virtual Node* load_at_resolved(C2Access& access, const Type* val_type) const; |
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virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicParseAccess& access, |
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Node* expected_val, |
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Node* new_val, |
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const Type* val_type) const; |
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virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicParseAccess& access, |
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Node* expected_val, |
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Node* new_val, |
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const Type* value_type) const; |
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virtual Node* atomic_xchg_at_resolved(C2AtomicParseAccess& access, |
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Node* new_val, |
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const Type* val_type) const; |
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Node* load_barrier(GraphKit* kit, |
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Node* val, |
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Node* adr, |
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bool weak = false, |
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bool writeback = true, |
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bool oop_reload_allowed = true) const; |
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virtual void* create_barrier_state(Arena* comp_arena) const; |
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virtual bool has_load_barriers() const { return true; } |
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virtual bool is_gc_barrier_node(Node* node) const; |
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virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const { } |
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virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful, Compile* C) const; |
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virtual void add_users_to_worklist(Unique_Node_List* worklist) const; |
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virtual void enqueue_useful_gc_barrier(PhaseIterGVN* igvn, Node* node) const; |
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virtual void register_potential_barrier_node(Node* node) const; |
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virtual void unregister_potential_barrier_node(Node* node) const; |
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virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, ArrayCopyPhase phase) const; |
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virtual Node* step_over_gc_barrier(Node* c) const; |
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// If the BarrierSetC2 state has kept barrier nodes in its compilation unit state to be |
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// expanded later, then now is the time to do so. |
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virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const; |
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static void find_dominating_barriers(PhaseIterGVN& igvn); |
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static void loop_optimize_gc_barrier(PhaseIdealLoop* phase, Node* node, bool last_round); |
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virtual bool final_graph_reshaping(Compile* compile, Node* n, uint opcode) const; |
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virtual bool matcher_find_shared_visit(Matcher* matcher, Matcher::MStack& mstack, Node* n, uint opcode, bool& mem_op, int& mem_addr_idx) const; |
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#ifdef ASSERT |
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virtual void verify_gc_barriers(Compile* compile, CompilePhase phase) const; |
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#endif |
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virtual bool escape_add_to_con_graph(ConnectionGraph* conn_graph, PhaseGVN* gvn, Unique_Node_List* delayed_worklist, Node* n, uint opcode) const; |
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virtual bool escape_add_final_edges(ConnectionGraph* conn_graph, PhaseGVN* gvn, Node* n, uint opcode) const; |
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}; |
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#endif // SHARE_GC_Z_C2_ZBARRIERSETC2_HPP |