exprprimresolved's N_DOT arm derived a struct field's prim width+sign by
walking the field's declared *node (dotfieldtnode + typenodeprimresolved
alias recursion). Read the checker-stamped tinfo instead, mirroring cstage
castsrcprim N_DOT (cmd/w6c/cgen.c:323-344): the base's n.lhs.type_ must
resolve to a struct (peel NAMED->PTR->NAMED, require TY_STRUCT) before the
field counts -- excluding pseudo-fields .len/.cap/.ptr (stamped i32/*T at
check.ww:1987-2004; their base is TY_SLICE/TY_STR/TY_ARRAY, never TY_STRUCT,
so the guard yields sz=0) and tuple positionals, which stay sz=0 to preserve
995 byte-id. The field's width/sign comes from the N_DOT's own n.type_
(check.ww:2012), one NAMED peel then typeisint?size:0. Bool exclusion is
now free via typeisint(bool)=false, dropping the old streq("bool") arm.
Polarity DOWN per rule 10: cstage castsrcprim already reads the stamped
type. typenamed() has zero callers in wwstage (tinfofornode collapses all
alias depth to the body), so no tinfo carries kind TY_NAMED -- the NAMED
peels are dead/inert, output matches cstage.
Removes one dotfieldtnode caller (3->2; remaining cgenutil 1073, 1871).
typenodeprimresolved retained (3 callers: cgenutil 1459/1465, cgenexpr 431).
Part of the dotfield* consumer-migration arc.
make test 133/133 (quiescent tree, byte-id 990-997 green). Coverage:
710_cast_enum_movl rows struct_field_rt + pseudo_field_clamp + bool_to_i8.
Hojun-Cho
827a05e548