author | chegar |
Thu, 17 Oct 2019 20:54:25 +0100 | |
branch | datagramsocketimpl-branch |
changeset 58679 | 9c3209ff7550 |
parent 58678 | 9cf78a70fa4f |
parent 58219 | bc0648405d67 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2018, Red Hat, Inc. All rights reserved. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_GC_SHENANDOAH_C2_SHENANDOAHSUPPORT_HPP |
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#define SHARE_GC_SHENANDOAH_C2_SHENANDOAHSUPPORT_HPP |
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#include "memory/allocation.hpp" |
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#include "opto/addnode.hpp" |
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#include "opto/graphKit.hpp" |
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#include "opto/machnode.hpp" |
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#include "opto/memnode.hpp" |
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#include "opto/multnode.hpp" |
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#include "opto/node.hpp" |
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class PhaseGVN; |
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class MemoryGraphFixer; |
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class ShenandoahBarrierC2Support : public AllStatic { |
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private: |
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#ifdef ASSERT |
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enum verify_type { |
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ShenandoahLoad, |
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ShenandoahStore, |
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ShenandoahValue, |
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ShenandoahOopStore, |
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ShenandoahNone |
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}; |
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static bool verify_helper(Node* in, Node_Stack& phis, VectorSet& visited, verify_type t, bool trace, Unique_Node_List& barriers_used); |
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static void report_verify_failure(const char* msg, Node* n1 = NULL, Node* n2 = NULL); |
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static void verify_raw_mem(RootNode* root); |
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#endif |
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static Node* dom_mem(Node* mem, Node* ctrl, int alias, Node*& mem_ctrl, PhaseIdealLoop* phase); |
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static Node* no_branches(Node* c, Node* dom, bool allow_one_proj, PhaseIdealLoop* phase); |
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static bool is_heap_state_test(Node* iff, int mask); |
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static bool try_common_gc_state_load(Node *n, PhaseIdealLoop *phase); |
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static bool has_safepoint_between(Node* start, Node* stop, PhaseIdealLoop *phase); |
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static Node* find_bottom_mem(Node* ctrl, PhaseIdealLoop* phase); |
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static void follow_barrier_uses(Node* n, Node* ctrl, Unique_Node_List& uses, PhaseIdealLoop* phase); |
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static void test_null(Node*& ctrl, Node* val, Node*& null_ctrl, PhaseIdealLoop* phase); |
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static void test_heap_stable(Node*& ctrl, Node* raw_mem, Node*& heap_stable_ctrl, |
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PhaseIdealLoop* phase); |
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static void call_lrb_stub(Node*& ctrl, Node*& val, Node* load_addr, Node*& result_mem, Node* raw_mem, bool is_native, PhaseIdealLoop* phase); |
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static Node* clone_null_check(Node*& c, Node* val, Node* unc_ctrl, PhaseIdealLoop* phase); |
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static void fix_null_check(Node* unc, Node* unc_ctrl, Node* new_unc_ctrl, Unique_Node_List& uses, |
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PhaseIdealLoop* phase); |
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static void in_cset_fast_test(Node*& ctrl, Node*& not_cset_ctrl, Node* val, Node* raw_mem, PhaseIdealLoop* phase); |
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static void move_heap_stable_test_out_of_loop(IfNode* iff, PhaseIdealLoop* phase); |
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static void merge_back_to_back_tests(Node* n, PhaseIdealLoop* phase); |
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static bool identical_backtoback_ifs(Node *n, PhaseIdealLoop* phase); |
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static void fix_ctrl(Node* barrier, Node* region, const MemoryGraphFixer& fixer, Unique_Node_List& uses, Unique_Node_List& uses_to_ignore, uint last, PhaseIdealLoop* phase); |
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static IfNode* find_unswitching_candidate(const IdealLoopTree *loop, PhaseIdealLoop* phase); |
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static Node* get_load_addr(PhaseIdealLoop* phase, VectorSet& visited, Node* lrb); |
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static bool is_dominator(Node* d_c, Node* n_c, Node* d, Node* n, PhaseIdealLoop* phase); |
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static bool is_dominator_same_ctrl(Node* c, Node* d, Node* n, PhaseIdealLoop* phase); |
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static bool is_gc_state_load(Node* n); |
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static bool is_heap_stable_test(Node* iff); |
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static bool expand(Compile* C, PhaseIterGVN& igvn); |
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static void pin_and_expand(PhaseIdealLoop* phase); |
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static void optimize_after_expansion(VectorSet& visited, Node_Stack& nstack, Node_List& old_new, PhaseIdealLoop* phase); |
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#ifdef ASSERT |
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static void verify(RootNode* root); |
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#endif |
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}; |
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class ShenandoahEnqueueBarrierNode : public Node { |
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ShenandoahEnqueueBarrierNode(Node* val); |
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const Type *bottom_type() const; |
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const Type* Value(PhaseGVN* phase) const; |
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Node* Identity(PhaseGVN* phase); |
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int Opcode() const; |
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private: |
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enum { Needed, NotNeeded, MaybeNeeded }; |
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static int needed(Node* n); |
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static Node* next(Node* n); |
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}; |
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class MemoryGraphFixer : public ResourceObj { |
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private: |
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110 |
Node_List _memory_nodes; |
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111 |
int _alias; |
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PhaseIdealLoop* _phase; |
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bool _include_lsm; |
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114 |
|
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115 |
void collect_memory_nodes(); |
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116 |
Node* get_ctrl(Node* n) const; |
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Node* ctrl_or_self(Node* n) const; |
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bool mem_is_valid(Node* m, Node* c) const; |
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119 |
MergeMemNode* allocate_merge_mem(Node* mem, Node* rep_proj, Node* rep_ctrl) const; |
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MergeMemNode* clone_merge_mem(Node* u, Node* mem, Node* rep_proj, Node* rep_ctrl, DUIterator& i) const; |
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121 |
void fix_memory_uses(Node* mem, Node* replacement, Node* rep_proj, Node* rep_ctrl) const; |
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bool should_process_phi(Node* phi) const; |
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bool has_mem_phi(Node* region) const; |
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124 |
|
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125 |
public: |
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126 |
MemoryGraphFixer(int alias, bool include_lsm, PhaseIdealLoop* phase) : |
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_alias(alias), _phase(phase), _include_lsm(include_lsm) { |
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128 |
assert(_alias != Compile::AliasIdxBot, "unsupported"); |
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129 |
collect_memory_nodes(); |
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130 |
} |
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131 |
|
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132 |
Node* find_mem(Node* ctrl, Node* n) const; |
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133 |
void fix_mem(Node* ctrl, Node* region, Node* mem, Node* mem_for_ctrl, Node* mem_phi, Unique_Node_List& uses); |
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134 |
int alias() const { return _alias; } |
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135 |
}; |
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136 |
|
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137 |
class ShenandoahCompareAndSwapPNode : public CompareAndSwapPNode { |
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138 |
public: |
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139 |
ShenandoahCompareAndSwapPNode(Node *c, Node *mem, Node *adr, Node *val, Node *ex, MemNode::MemOrd mem_ord) |
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140 |
: CompareAndSwapPNode(c, mem, adr, val, ex, mem_ord) { } |
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|
141 |
|
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142 |
virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { |
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143 |
if (in(ExpectedIn) != NULL && phase->type(in(ExpectedIn)) == TypePtr::NULL_PTR) { |
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144 |
return new CompareAndSwapPNode(in(MemNode::Control), in(MemNode::Memory), in(MemNode::Address), in(MemNode::ValueIn), in(ExpectedIn), order()); |
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145 |
} |
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146 |
return NULL; |
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147 |
} |
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148 |
|
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149 |
virtual int Opcode() const; |
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150 |
}; |
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|
151 |
|
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152 |
class ShenandoahCompareAndSwapNNode : public CompareAndSwapNNode { |
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153 |
public: |
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154 |
ShenandoahCompareAndSwapNNode(Node *c, Node *mem, Node *adr, Node *val, Node *ex, MemNode::MemOrd mem_ord) |
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155 |
: CompareAndSwapNNode(c, mem, adr, val, ex, mem_ord) { } |
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|
156 |
|
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157 |
virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { |
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158 |
if (in(ExpectedIn) != NULL && phase->type(in(ExpectedIn)) == TypeNarrowOop::NULL_PTR) { |
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|
159 |
return new CompareAndSwapNNode(in(MemNode::Control), in(MemNode::Memory), in(MemNode::Address), in(MemNode::ValueIn), in(ExpectedIn), order()); |
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160 |
} |
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161 |
return NULL; |
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162 |
} |
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|
163 |
|
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164 |
virtual int Opcode() const; |
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165 |
}; |
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|
166 |
|
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167 |
class ShenandoahWeakCompareAndSwapPNode : public WeakCompareAndSwapPNode { |
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168 |
public: |
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169 |
ShenandoahWeakCompareAndSwapPNode(Node *c, Node *mem, Node *adr, Node *val, Node *ex, MemNode::MemOrd mem_ord) |
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170 |
: WeakCompareAndSwapPNode(c, mem, adr, val, ex, mem_ord) { } |
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|
171 |
|
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|
172 |
virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { |
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|
173 |
if (in(ExpectedIn) != NULL && phase->type(in(ExpectedIn)) == TypePtr::NULL_PTR) { |
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|
174 |
return new WeakCompareAndSwapPNode(in(MemNode::Control), in(MemNode::Memory), in(MemNode::Address), in(MemNode::ValueIn), in(ExpectedIn), order()); |
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|
175 |
} |
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|
176 |
return NULL; |
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|
177 |
} |
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|
178 |
|
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179 |
virtual int Opcode() const; |
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|
180 |
}; |
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|
181 |
|
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|
182 |
class ShenandoahWeakCompareAndSwapNNode : public WeakCompareAndSwapNNode { |
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|
183 |
public: |
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184 |
ShenandoahWeakCompareAndSwapNNode(Node *c, Node *mem, Node *adr, Node *val, Node *ex, MemNode::MemOrd mem_ord) |
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|
185 |
: WeakCompareAndSwapNNode(c, mem, adr, val, ex, mem_ord) { } |
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|
186 |
|
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|
187 |
virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { |
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|
188 |
if (in(ExpectedIn) != NULL && phase->type(in(ExpectedIn)) == TypeNarrowOop::NULL_PTR) { |
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|
189 |
return new WeakCompareAndSwapNNode(in(MemNode::Control), in(MemNode::Memory), in(MemNode::Address), in(MemNode::ValueIn), in(ExpectedIn), order()); |
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|
190 |
} |
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|
191 |
return NULL; |
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|
192 |
} |
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|
193 |
|
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194 |
virtual int Opcode() const; |
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|
195 |
}; |
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|
196 |
|
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197 |
class ShenandoahCompareAndExchangePNode : public CompareAndExchangePNode { |
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198 |
public: |
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199 |
ShenandoahCompareAndExchangePNode(Node *c, Node *mem, Node *adr, Node *val, Node *ex, const TypePtr* at, const Type* t, MemNode::MemOrd mem_ord) |
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|
200 |
: CompareAndExchangePNode(c, mem, adr, val, ex, at, t, mem_ord) { } |
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|
201 |
|
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202 |
virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { |
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|
203 |
if (in(ExpectedIn) != NULL && phase->type(in(ExpectedIn)) == TypePtr::NULL_PTR) { |
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|
204 |
return new CompareAndExchangePNode(in(MemNode::Control), in(MemNode::Memory), in(MemNode::Address), in(MemNode::ValueIn), in(ExpectedIn), adr_type(), bottom_type(), order()); |
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|
205 |
} |
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206 |
return NULL; |
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|
207 |
} |
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|
208 |
|
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209 |
virtual int Opcode() const; |
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}; |
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class ShenandoahCompareAndExchangeNNode : public CompareAndExchangeNNode { |
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public: |
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ShenandoahCompareAndExchangeNNode(Node *c, Node *mem, Node *adr, Node *val, Node *ex, const TypePtr* at, const Type* t, MemNode::MemOrd mem_ord) |
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: CompareAndExchangeNNode(c, mem, adr, val, ex, at, t, mem_ord) { } |
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virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { |
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if (in(ExpectedIn) != NULL && phase->type(in(ExpectedIn)) == TypeNarrowOop::NULL_PTR) { |
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return new CompareAndExchangeNNode(in(MemNode::Control), in(MemNode::Memory), in(MemNode::Address), in(MemNode::ValueIn), in(ExpectedIn), adr_type(), bottom_type(), order()); |
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} |
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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 ShenandoahLoadReferenceBarrierNode : public Node { |
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enum { |
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Control, |
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ValueIn |
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}; |
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enum Strength { |
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NONE, STRONG |
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}; |
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private: |
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bool _native; |
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ShenandoahLoadReferenceBarrierNode(Node* ctrl, Node* val, bool native); |
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bool is_native() const; |
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virtual int Opcode() const; |
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virtual const Type* bottom_type() const; |
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virtual const Type* Value(PhaseGVN* phase) const; |
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virtual const class TypePtr *adr_type() const { return TypeOopPtr::BOTTOM; } |
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virtual uint match_edge(uint idx) const { |
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return idx >= ValueIn; |
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} |
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virtual uint ideal_reg() const { return Op_RegP; } |
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virtual Node* Identity(PhaseGVN* phase); |
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virtual uint size_of() const; |
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virtual uint hash() const; |
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virtual bool cmp( const Node &n ) const; |
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Strength get_barrier_strength(); |
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CallStaticJavaNode* pin_and_expand_null_check(PhaseIterGVN& igvn); |
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bool needs_barrier(PhaseGVN* phase, Node* n); |
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bool needs_barrier_impl(PhaseGVN* phase, Node* n, Unique_Node_List &visited); |
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}; |
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#endif // SHARE_GC_SHENANDOAH_C2_SHENANDOAHSUPPORT_HPP |