The chained value-struct spine-walker resolved root + total offset + leaf
type via structinfo/fieldinfo (slot-padded foff). Swap its guts onto the
stamped root-ident type_: peel TY_NAMED to TY_STRUCT (one TY_PTR hop for a
*struct root) and accumulate tfield.offset down the spine, mirroring cstage's
cur->lhs->type fields walk (cmd/w6c/cgen.c:3156-3216 write, :1955-2030 AMP/
read). Leaf out-param becomes *tinfo; the three callers read leaf-ness via
typeis*/loadopsz, and the cgassign struct-terminal recovers the struct name
from the leaf tinfo's NAMED wrapper for the still-structinfo cgstructlitfill.
Root classification (local/ptr/global) is unchanged, so the firing set and
addressing mode stay byte-identical; the global-root path remains its pre-
existing shared breakage (#27), untouched. Natural tfield.offset equals the
old slot-padded foff for every shape the byte-id gate exercises -- and since
cstage already reads the natural offset and ww-old==cstage held, the flip is
structurally identical, not coincidental.
Latent (off-corpus, byte-id-neutral): the tinfo-peel now fires the str/slice
pseudo-leaf on an aliased-str/slice field where the old structinfo path
bailed -- a faithful-toward-cstage gap closure, filed for a probe + sentinel.
make test 134/134, byte-id 950+990-997 hold.
Hojun-Cho
0763377806