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8211776: 8210887 broke arraycopy optimization when ZGC is enabled

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Reviewed-by: kvn
This commit is contained in:
Roland Westrelin 2018-10-05 16:47:27 +02:00
parent 5cf91fc60e
commit 90d6bbd01a
2 changed files with 5 additions and 1 deletions
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4
src/hotspot/share/gc/z/c2/zBarrierSetC2.cpp
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@ -1427,6 +1427,10 @@ Node* ZBarrierSetC2::step_over_gc_barrier(Node* c) const {
return c;
}
bool ZBarrierSetC2::array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, ArrayCopyPhase phase) const {
return type == T_OBJECT || type == T_ARRAY;
}
// == Verification ==
#ifdef ASSERT

2
src/hotspot/share/gc/z/c2/zBarrierSetC2.hpp
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@ -194,7 +194,7 @@ public:
virtual void enqueue_useful_gc_barrier(Unique_Node_List &worklist, Node* node) const;
virtual void register_potential_barrier_node(Node* node) const;
virtual void unregister_potential_barrier_node(Node* node) const;
virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, ArrayCopyPhase phase) const { return true; }
virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, ArrayCopyPhase phase) const;
virtual Node* step_over_gc_barrier(Node* c) const;
// If the BarrierSetC2 state has kept macro nodes in its compilation unit state to be
// expanded later, then now is the time to do so.