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8150933: System::arraycopy intrinsic doesn't mark mismatched loads

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Reviewed-by: kvn, shade
This commit is contained in:
Vladimir Ivanov 2016-03-01 20:06:47 +03:00
parent d466ce4948
commit a1b61d2827
2 changed files with 12 additions and 7 deletions
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10
hotspot/src/share/vm/opto/macroArrayCopy.cpp
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@ -880,8 +880,14 @@ bool PhaseMacroExpand::generate_block_arraycopy(Node** ctrl, MergeMemNode** mem,
Node* sptr = basic_plus_adr(src, src_off);
Node* dptr = basic_plus_adr(dest, dest_off);
uint alias_idx = C->get_alias_index(adr_type);
Node* sval = transform_later(LoadNode::make(_igvn, *ctrl, (*mem)->memory_at(alias_idx), sptr, adr_type, TypeInt::INT, T_INT, MemNode::unordered));
Node* st = transform_later(StoreNode::make(_igvn, *ctrl, (*mem)->memory_at(alias_idx), dptr, adr_type, sval, T_INT, MemNode::unordered));
bool is_mismatched = (basic_elem_type != T_INT);
Node* sval = transform_later(
LoadNode::make(_igvn, *ctrl, (*mem)->memory_at(alias_idx), sptr, adr_type,
TypeInt::INT, T_INT, MemNode::unordered, LoadNode::DependsOnlyOnTest,
false /*unaligned*/, is_mismatched));
Node* st = transform_later(
StoreNode::make(_igvn, *ctrl, (*mem)->memory_at(alias_idx), dptr, adr_type,
sval, T_INT, MemNode::unordered));
(*mem)->set_memory_at(alias_idx, st);
src_off += BytesPerInt;
dest_off += BytesPerInt;