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feat(cli): ludic deps --writes warns about writes through a local alias

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A local bound straight from another module's global (let t =
thing_cur), or from such a local, is followed within its function, and
a write through its field or element is listed as a warning after the
counted writes. A reference from a function's result is not followed.
Reseed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-25 13:22:37 +03:00
parent 8892f51096
commit 63a1fa1378
12 changed files with 43331 additions and 41501 deletions
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4
selfhost/backend/emit_stmt.ludic
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@ -36,6 +36,7 @@ function emit_assign(st: Node) -> void {
# a `let` binding is immutable: rebinding it is an error (mutating THROUGH
# it — `x.field = …`, `x[i] = …` — is fine, and lands in the branches below).
if loc_mut[li] == 0 { perr(`cannot assign to immutable '{t.s}' (declared with let; use var) — line {itoa(st.line)}`) }
if deps_on() { deps_alias_let(t.s, st.b) } # the local now holds what it is given
addr = loc_reg[li]; ty = loc_ty[li]
}
else {
@ -48,7 +49,7 @@ function emit_assign(st: Node) -> void {
} else {
if deps_on() {
let root = deps_target_root(t)
if root != null { deps_write(root, root.s) }
if root != null { deps_write(root, root.s) } else { deps_alias_write(t) }
}
if t.kind == E_MEMBER { addr = emit_member_addr(t); ty = g_addr_ty }
else { if t.kind == E_INDEX { addr = emit_index_addr(t); ty = g_addr_ty }
@ -359,6 +360,7 @@ function emit_stmt(st: Node) -> void {
emit_cov_hit(st.line) # --coverage: bump this line's hit counter (no-op otherwise)
if st.kind == S_LET {
loc_check_redeclared(st.s)
deps_alias_let(st.s, st.a)
var ty = st.ty
if (ty == null) { let v0 = emit_expr(st.a); ty = v0.ty
let slot = emit_alloca(llty(ty)); store_at(llty(ty), v0.code, slot); loc_push(st.s, slot, ty); loc_mark_declared(); loc_set_mut(st.ival); return }