Hojun-Cho 074e68f05d w6c_ww: tinfo re-key of the cgdot N_INDEX-base arm (F7/F10) ...

The wwstage `arr[i].field` read arm was syntactic where cstage is
type-table-driven: element typing keyed on tnode KINDs (N_TSLICE/
N_TARRAY/N_TPTR) with an N_TNAME element resolved by structlookup
NAME — any base typed via an alias (`type result = []capture`,
p11b/F10) missed every gate and died at the interim C2 loud guard
(pre-C2: fell silently to the SB fallback). Re-key the arm onto the
checker-stamped tinfo (lhs.type_ element / idxbase.type_ base, NAMED
peeled), mirroring cstage cgen.c case N_DOT's N_INDEX-lhs arm 1:1 —
the #209/#211 name-keyed->tinfo-SSoT cluster. Emission sequence is
unchanged; the C2 "C3/task #8" guard retires with the arm wired
(task #37's ptr-chain guard is untouched). Global classification
mirrors cstage let_islet || def_isarraydef via isletvar /
defvartnode-N_TARRAY (the cgplaceaddr C2 pattern).

F7/FA5/FA3-ww/FA6 (non-ident idxbase shapes, task #17's ww halves)
were already closed by C2's read-resolver recursion; p7_composed,
pA5, pA9 run exit-0 byte-id and are pinned as rows here. Task #29's
asserttyped bail (strings.frombytes over a slice-expr in the
composed context) no longer reproduces at HEAD — dissolved during
the C1.25->C2 arc; p7_composed builds clean on w6c_ww, runs 0,
byte-id.

Behind the retired guard three alias-blind NON-cgdot sites surface
(`let l: wlist = []` checker reject / alias-array global emits no
DATA / alias-array arrlit-init under-copies 8B per element, cs!=ww
runtime): filed as task #38, same name-keyed class, separate sites.

test/805: +5 rows — alias-slice field-kind matrix, alias-array +
viaptr-element bases, p11b-essence let-bound alias reads (the
task-#14 `?` factored out), the composed p7 match/compound hot
shape, and the pA9 free()-operand acceptance row (FA6).

Task #8; the last cgen gate before regex tranche B.

2026-06-04 11:34:16 +09:00

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