OOP: optimization in dupe base check.

Hypothesis: the majority of struct types will not be used as
inheritance bases, and most of those that are bases will
not be appear as duplicate bases.  If we put a flag into a
type which indicates that it has been used as a duplicate
base, we can check that flag to do less work when initializing
an object.

* struct.c (struct struct_type): New flag, dupe.
(get_duplicate_supers): Each time we find a duplicate
supertype, we set its dupe flag.
(make_struct_type): Allocate the struct type with chk_calloc
instead of chk_malloc, so the flag is initialized to zero.
Remove initializations of some members to zero: those of
nslots, ntslots, stslot and spslot.
(call_initfun_chain, call_postinitfun_chain): Don't bother
search for st in the root's array of duplicates if st is not
marked with the dupe flag.

0 files changed, 0 insertions, 0 deletions