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8182475: C2: allow vectorization of HeapByteBuffer.putInt loops

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Reviewed-by: kvn
This commit is contained in:
Roland Westrelin 2017-07-27 17:47:57 -07:00
parent af5c6eefbf
commit b170f01ddd
1 changed files with 13 additions and 7 deletions

20
hotspot/src/share/vm/opto/superword.cpp

@ -3199,7 +3199,15 @@ void SuperWord::align_initial_loop_index(MemNode* align_to_ref) {
if (align_to_ref_p.invar() != NULL) {
// incorporate any extra invariant piece producing (offset +/- invar) >>> log2(elt)
Node* log2_elt = _igvn.intcon(exact_log2(elt_size));
Node* aref = new URShiftINode(align_to_ref_p.invar(), log2_elt);
Node* invar = align_to_ref_p.invar();
if (_igvn.type(invar)->isa_long()) {
// Computations are done % (vector width/element size) so it's
// safe to simply convert invar to an int and loose the upper 32
// bit half.
invar = new ConvL2INode(invar);
_igvn.register_new_node_with_optimizer(invar);
}
Node* aref = new URShiftINode(invar, log2_elt);
_igvn.register_new_node_with_optimizer(aref);
_phase->set_ctrl(aref, pre_ctrl);
if (align_to_ref_p.negate_invar()) {
@ -3644,12 +3652,10 @@ bool SWPointer::offset_plus_k(Node* n, bool negate) {
n = n->in(1);
}
}
if (n->bottom_type()->isa_int()) {
_negate_invar = negate;
_invar = n;
NOT_PRODUCT(_tracer.offset_plus_k_10(n, _invar, _negate_invar, _offset);)
return true;
}
_negate_invar = negate;
_invar = n;
NOT_PRODUCT(_tracer.offset_plus_k_10(n, _invar, _negate_invar, _offset);)
return true;
}
NOT_PRODUCT(_tracer.offset_plus_k_11(n);)