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8132051: Better byte behavior

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Co-authored-by: Roland Westerlin <roland.westerlin@oracle.com>
Co-authored-by: Vladimir Kozlov <vladimir.kozlov@oracle.com>
Co-authored-by: John Rose <john.r.rose@oracle.com>
Reviewed-by: bdelsart, roland, kvn, jrose, ahgross
This commit is contained in:
Coleen Phillimore 2015-10-13 18:13:34 -04:00
parent ed18f94d21
commit 200784d505
40 changed files with 514 additions and 88 deletions
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23
hotspot/src/share/vm/c1/c1_LIRGenerator.cpp
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@ -3680,3 +3680,26 @@ void LIRGenerator::do_MemBar(MemBar* x) {
}
}
}
LIR_Opr LIRGenerator::maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info) {
if (x->check_boolean()) {
LIR_Opr value_fixed = rlock_byte(T_BYTE);
if (TwoOperandLIRForm) {
__ move(value, value_fixed);
__ logical_and(value_fixed, LIR_OprFact::intConst(1), value_fixed);
} else {
__ logical_and(value, LIR_OprFact::intConst(1), value_fixed);
}
LIR_Opr klass = new_register(T_METADATA);
__ move(new LIR_Address(array, oopDesc::klass_offset_in_bytes(), T_ADDRESS), klass, null_check_info);
null_check_info = NULL;
LIR_Opr layout = new_register(T_INT);
__ move(new LIR_Address(klass, in_bytes(Klass::layout_helper_offset()), T_INT), layout);
int diffbit = Klass::layout_helper_boolean_diffbit();
__ logical_and(layout, LIR_OprFact::intConst(diffbit), layout);
__ cmp(lir_cond_notEqual, layout, LIR_OprFact::intConst(0));
__ cmove(lir_cond_notEqual, value_fixed, value, value_fixed, T_BYTE);
value = value_fixed;
}
return value;
}