ZSTD_overlap_src_before_dst
if (ovtype == ZSTD_overlap_src_before_dst && diff < WILDCOPY_VECLEN) {
ZSTD_wildcopy(op, match, (ptrdiff_t)sequence.matchLength - 8, ZSTD_overlap_src_before_dst);
ZSTD_wildcopy(op, match, (ptrdiff_t)sequence.matchLength-8, ZSTD_overlap_src_before_dst);
(ovtype == ZSTD_overlap_src_before_dst && diff >= 0));
if (ovtype == ZSTD_overlap_src_before_dst) {
ZSTD_safecopy(op, oend_w, match, sequence.matchLength, ZSTD_overlap_src_before_dst);
ZSTD_safecopy(op, oend_w, match, sequence.matchLength, ZSTD_overlap_src_before_dst);