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wcc: structlit repeat-fill dim off the stamped tinfo (rule 13)

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cgstructlitfill's `...` total read only an N_INTLIT dim node, so a
def-dimensioned [N]T struct field under-filled: elements 1..N-1 kept
the zero-fill, silently, wwstage only (cstage and the tn twin read
the stamped array length). Read tichase(fi.tnode.type_).alen first;
the surface node stays as the fallback for unstamped shapes.
This commit is contained in:
Hojun-Cho
2026-08-09 00:40:23 +09:00
parent f191e6e0e2
commit 973dd964c9
3 changed files with 29 additions and 6 deletions
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11
selfhost/cmd/wcc/cgenutil.ww
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@@ -5937,11 +5937,18 @@ fn cgstructlitfill(c: *cgen, si: *structinfo, lit: *syntax.node,
};
if (repeat) {
let total: i32 = idx;
if (fi.tnode.rhs != nil) {
// rule 13: dim off the STAMPED array tinfo, not
// the surface node — an N_INTLIT-only read left a
// def-dimensioned [N]T field under-filled (ww-only
// silent; cstage + the tn twin read stamped alen).
let ftfill: *syntax.tinfo = tichase(fi.tnode.type_: *syntax.tinfo);
if (ftfill != nil && ftfill.kind == syntax.tykind.TY_ARRAY) {
total = ftfill.alen: i32;
} else { if (fi.tnode.rhs != nil) {
if (fi.tnode.rhs.kind == syntax.nkind.N_INTLIT) {
total = fi.tnode.rhs.uval: i32;
};
};
}; };
for (idx < total) {
if (mode == 1) {
emitline("\tMOVQ\t");