Hojun-Cho 5c1e9c0bfb lib/ww/lex: kwlookup if-ladder -> [N]str parallel-table linear scan (kwtab, rides #18/#8) ...

Replace kwlookup's 30-arm streqn if-ladder with two parallel module-level
tables — kwnames: [30]str + kwkinds: [30]tkind — scanned linearly via
strings.compare, and delete the hand-rolled streqn. Rides #18 (module-
level [N]str static-init + relocations) for the kwnames data and #8
([N]enum element sizing) for the kwkinds[i] read, which is itself the
construct that surfaced the #8 elemsizeofc/array-init-store miscompile.

Two parallel arrays rather than a [N]kwent array-of-struct: a str inside
an aggregate element is the filed #18 follow-up. Mirrors the C twin
cmd/wcc/tok.c kwlookup (N=30, linear, no hash). Source re-applied on top
of the #8 cgen fix and regenerated fresh: the wwstage-compiled toktest
now runs correctly (exit 0, no segfault) where pre-#8 it smashed the
frame on the local [N]tkind init store.

2026-06-03 14:58:23 +09:00

1.2 MiB

Raw Blame History

View Raw