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8140390: Char stores/loads accessing byte arrays must be marked as unmatched

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Mark unmatched char stores/loads emitted by CompactStrings.

Reviewed-by: roland, vlivanov, jrose
This commit is contained in:
Tobias Hartmann 2015-11-20 10:09:42 +01:00
parent 2ae7dcf853
commit ea052022fa
4 changed files with 11 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

3
hotspot/src/share/vm/opto/graphKit.cpp
View file

@ -4387,7 +4387,8 @@ void GraphKit::inflate_string_slow(Node* src, Node* dst, Node* start, Node* coun
set_memory(mem, TypeAryPtr::BYTES);
Node* ch = load_array_element(control(), src, i_byte, TypeAryPtr::BYTES);
Node* st = store_to_memory(control(), array_element_address(dst, i_char, T_BYTE),
AndI(ch, intcon(0xff)), T_CHAR, TypeAryPtr::BYTES, MemNode::unordered);
AndI(ch, intcon(0xff)), T_CHAR, TypeAryPtr::BYTES, MemNode::unordered,
false, false, true /* mismatched */);
IfNode* iff = create_and_map_if(head, Bool(CmpI(i_byte, count), BoolTest::lt), PROB_FAIR, COUNT_UNKNOWN);
head->init_req(2, IfTrue(iff));

3
hotspot/src/share/vm/opto/idealKit.hpp
View file

@ -230,8 +230,7 @@ class IdealKit: public StackObj {
int adr_idx,
MemNode::MemOrd mo,
bool require_atomic_access = false,
bool mismatched = false
);
bool mismatched = false);
// Store a card mark ordered after store_oop
Node* storeCM(Node* ctl,

6
hotspot/src/share/vm/opto/library_call.cpp
View file

@ -1503,9 +1503,11 @@ bool LibraryCallKit::inline_string_char_access(bool is_store) {
Node* adr = array_element_address(value, index, T_CHAR);
if (is_store) {
(void) store_to_memory(control(), adr, ch, T_CHAR, TypeAryPtr::BYTES, MemNode::unordered);
(void) store_to_memory(control(), adr, ch, T_CHAR, TypeAryPtr::BYTES, MemNode::unordered,
false, false, true /* mismatched */);
} else {
ch = make_load(control(), adr, TypeInt::CHAR, T_CHAR, MemNode::unordered);
ch = make_load(control(), adr, TypeInt::CHAR, T_CHAR, MemNode::unordered,
LoadNode::DependsOnlyOnTest, false, false, true /* mismatched */);
set_result(ch);
}
return true;

8
hotspot/src/share/vm/opto/stringopts.cpp
View file

@ -1293,7 +1293,7 @@ void PhaseStringOpts::getChars(GraphKit& kit, Node* arg, Node* dst_array, BasicT
Node* index = __ SubI(charPos, __ intcon((bt == T_BYTE) ? 1 : 2));
Node* ch = __ AddI(r, __ intcon('0'));
Node* st = __ store_to_memory(kit.control(), kit.array_element_address(dst_array, index, T_BYTE),
ch, bt, byte_adr_idx, MemNode::unordered);
ch, bt, byte_adr_idx, MemNode::unordered, (bt != T_BYTE) /* mismatched */);
iff = kit.create_and_map_if(head, __ Bool(__ CmpI(q, __ intcon(0)), BoolTest::ne),
PROB_FAIR, COUNT_UNKNOWN);
@ -1331,7 +1331,7 @@ void PhaseStringOpts::getChars(GraphKit& kit, Node* arg, Node* dst_array, BasicT
} else {
Node* index = __ SubI(charPos, __ intcon((bt == T_BYTE) ? 1 : 2));
st = __ store_to_memory(kit.control(), kit.array_element_address(dst_array, index, T_BYTE),
sign, bt, byte_adr_idx, MemNode::unordered);
sign, bt, byte_adr_idx, MemNode::unordered, (bt != T_BYTE) /* mismatched */);
final_merge->init_req(merge_index + 1, kit.control());
final_mem->init_req(merge_index + 1, st);
@ -1524,7 +1524,7 @@ void PhaseStringOpts::copy_constant_string(GraphKit& kit, IdealKit& ideal, ciTyp
} else {
val = readChar(src_array, i++);
}
__ store(__ ctrl(), adr, __ ConI(val), T_CHAR, byte_adr_idx, MemNode::unordered);
__ store(__ ctrl(), adr, __ ConI(val), T_CHAR, byte_adr_idx, MemNode::unordered, true /* mismatched */);
index = __ AddI(index, __ ConI(2));
}
if (src_is_byte) {
@ -1612,7 +1612,7 @@ Node* PhaseStringOpts::copy_char(GraphKit& kit, Node* val, Node* dst_array, Node
}
if (!dcon || !dbyte) {
// Destination is UTF16. Store a char.
__ store(__ ctrl(), adr, val, T_CHAR, byte_adr_idx, MemNode::unordered);
__ store(__ ctrl(), adr, val, T_CHAR, byte_adr_idx, MemNode::unordered, true /* mismatched */);
__ set(end, __ AddI(start, __ ConI(2)));
}
if (!dcon) {