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8169497: Aarch64: Improve internal array handling

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Reviewed-by: aph
This commit is contained in:
Roland Westrelin 2016-10-07 15:59:38 +02:00
parent ab06fed6eb
commit b49746775c
1 changed files with 19 additions and 0 deletions
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19
hotspot/src/cpu/aarch64/vm/c1_LIRAssembler_aarch64.cpp
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@ -2249,6 +2249,25 @@ void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
__ cbz(dst, *stub->entry());
}
// If the compiler was not able to prove that exact type of the source or the destination
// of the arraycopy is an array type, check at runtime if the source or the destination is
// an instance type.
if (flags & LIR_OpArrayCopy::type_check) {
if (!(flags & LIR_OpArrayCopy::LIR_OpArrayCopy::dst_objarray)) {
__ load_klass(tmp, dst);
__ ldrw(rscratch1, Address(tmp, in_bytes(Klass::layout_helper_offset())));
__ cmpw(rscratch1, Klass::_lh_neutral_value);
__ br(Assembler::GE, *stub->entry());
}
if (!(flags & LIR_OpArrayCopy::LIR_OpArrayCopy::src_objarray)) {
__ load_klass(tmp, src);
__ ldrw(rscratch1, Address(tmp, in_bytes(Klass::layout_helper_offset())));
__ cmpw(rscratch1, Klass::_lh_neutral_value);
__ br(Assembler::GE, *stub->entry());
}
}
// check if negative
if (flags & LIR_OpArrayCopy::src_pos_positive_check) {
__ cmpw(src_pos, 0);