agra 5f64ee4426 fix(ir): reflection builtins on an Any read its runtime tag, not payload [F0.8] ...

`type_name` / `type_is_unsigned` on an `Any` argument unconditionally read
the Any's payload as a TypeId index. That is correct only when the Any holds
a Type value (`{ .any, tid }`); for an Any holding a runtime *value*
(`av : Any = 6`, tag s64, payload 6) it returned `types[6]` — `type_name(av)`
gave "u8" and `type_is_unsigned(av)` gave true.

Both backends now branch on the Any's runtime type-tag: tag == `.any` → the
box is a Type value, use the payload as the TypeId; otherwise the tag IS the
held value's type. So `type_name(av)` → "s64", `type_is_unsigned(av)` → false,
while `type_name(type_of(x))` still names the held type. The `{}` formatter is
unchanged (it already passed `type_of(val)`, a proper Type value).

- src/ir/interp.zig: shared `Value.reflectTypeId` tag-branching resolver; the
  `type_name` / `type_is_unsigned` interp arms route through it.
- src/backend/llvm/ops.zig: shared `Ops.reflectArgTypeId` emits
  extractvalue-tag / icmp-eq-.any / select for the runtime path; both
  reflection arms route through it. The two backends agree.
- examples/0164-types-reflection-any-tag.sx: regression pinning type_name /
  type_is_unsigned / print on an Any holding a value vs a Type.
- src/ir/interp.test.zig: unit test for `reflectTypeId`.
- 22 .ir snapshots: the new select appears in every std-importing program's
  IR (any_to_string embeds these builtins) — benign, verified structurally
  identical apart from the three new instructions.
- issues/0090, specs.md: documented the Any-tag rule.

2026-06-05 12:09:52 +03:00

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