rob probe-ruled F1 enrollment (fold-or-file decided by the dispatch
test): the chained-dot STORE walk, its READ twin, and the addr-of
sibling each single-peeled every hop's type, so an alias-typed field
(type fa = inner; outer{x: fa}) aborted the offset-folding fast arm and
fell to the generic address spine — store via cgplaceaddr
(PUSHQ/LEAQ/ADDQ/POPQ), read via ADDQ-per-hop. Runtime-correct BOTH
stages; byte-id NO vs wwstage's folded direct MOVQ offsets
(reviewer-62r diamond find). Chasing the walk hops (+ the read arm's
leaf gate and the two ptr-root sub peels) flips cs onto the fast arm =
wwstage's asm exactly.
Blast radius measured per rob's caution: bootstrap asm cmp-identical
vs the pristine 738d7f4 scratch on all five main.combined.ww, 989
lib_byteid pins unchanged (31/9/3), every control row byte-id — the
flip moves ONLY the #71 shapes.
test: 944_alias_accept_run +2 rows, both decl orders: nested store +
last-field readback; the fwd row adds the &v.y.b addr-of + deref-write
leg. Mutation-checked at the 738d7f4 scratch: both rows byte-id-diff
there; 70/70 green here.
Also graduates the reviewer-F1 slicefield rows: their `.len` readbacks
ride this walk, so the 7 K_RUN_CS rows from commit 1 flip to K_RUN
(byte-id) here.
Hojun-Cho
ac63951d54