69749fc3e10bd47aeaef62340bdfef1b9566951f
3 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 Brummel
|
a6fd93adba |
feat(codegen): pre-resolve the App callee in MIR; delete is_static_callee + type_home_module (mir.2)
Second re-deriver removal of the typed-MIR milestone (spec
docs/specs/0060-typed-mir.md, plan docs/plans/0116-mir.2-callee-static.md).
Static-callee resolution moves out of codegen and into lower_to_mir:
every Term::App callee is classified once, mirroring check's own synth
Term::Var ladder (lib.rs:3409-3582), and emitted as a resolved Callee.
Codegen reads the callee identity off MIR and routes each kind to the
right lowering. The codegen re-derivers is_static_callee and
type_home_module are deleted, and the lower_app <-> is_static_callee
lockstep pair is struck from CLAUDE.md.
Callee reshape (beyond the spec's original {module, fn_name} sketch —
spec 0060's Concrete-code-shapes block is updated in this iteration):
pub enum Callee {
Static { module, fn_name, sig: Type }, // user/prelude fn -> emit_call, module pre-resolved
Builtin { name, sig: Type }, // operator/intrinsic -> inline opcode lowering
Indirect(Box<MTerm>), // dynamic: fn-pointer / closure / shadowed name
}
Two forced refinements, both settled in planning:
- sig:Type on each resolved variant. drop::synth_callee_ret_mode reads
the callee ret_mode, today off Callee::Indirect(inner).ty(). A
resolved callee has no sub-term, so the sig (= synth_pure(callee),
mode-preserving) is the lossless replacement. This is NOT a mir.3
pull-forward: the MArg param-mode / consume_count fields stay at their
mir.1 defaults. Without it, every statically-resolved call would lose
its drop signal and the RawBuf / int_to_str RC-stats pins mir.1b fixed
would regress.
- Builtin variant. Operators and the str-num builtins (+, not,
str_concat, ...) are lowered inline by name and have no module/fn_name;
a separate variant is cleaner than a sentinel module. The classifier
decides Builtin vs Static from CHECK'S OWN resolution (a name in
env.globals with no owning module is a builtin), never a copy of
codegen's old is_static_callee allowlist. The recon's divergence audit
confirmed check's builtin set and codegen's inline-arm set match
exactly, so the single-engine rule is mechanically satisfiable with no
env threading gap.
type_home_module is fully deletable: a workspace-wide grep confirmed no
program references a type-scoped T.fn as a value, so its only other
consumer (resolve_top_level_fn) collapses to the module-name fallback
with no behaviour change. (The spec's "x3 mirrors" wording over-counted;
the live surface was the definition plus two call sites.)
Alternatives rejected during planning: sentinel module in Static
(ugly); builtins left as Indirect (breaks — no fn-pointer for an
operator); name-rewrite Static{name,sig} keeping lower_app's by-name
dispatch (blurs builtin/user and still needs sig). The mir.1b
re-synth-strictness trap (post-mono synth_pure re-unify surfacing
mode-strip / bare-vs-qualified / metavar leaks) did NOT fire under the
new producer path — qualify_local_types mode-preservation and the $u
wildcard normalisation from mir.1b held.
Verification (orchestrator, post-implement inspect): diff matches the
plan; grep-clean for is_static_callee + type_home_module across
ailang-codegen and ail; cargo build --workspace green; cargo test
--workspace 700 passed / 0 failed / 3 ignored (no #[ignore] added this
iteration — the 3 are the pre-existing #49 Str-leg pin + two doctests).
Acceptance witnesses green: #53 (mono_new_over_user_adt_builds_and_runs),
#51 (rawbuf_new_int_size_only_builds_and_runs still builds), show_print
cross-module (print_user_adt_runs_end_to_end), the new mir.2 pins
(mir2_resolved_callee_kinds_run_end_to_end, callee_classification_*,
strengthened new_over_user_adt_carries_node_types asserting Callee::Static).
#49 heap-Str loop binder stays #[ignore] (lifts at mir.4).
Two new examples/ fixtures back the new pins (classify_pin.ail for the
producer classification pin, mir2_callee_kinds.ail for the E2E),
ail-parse / round-trip clean.
Forward note (cycle-close architect): crates/ail/tests/codegen_import_map_fallback_pin.rs:14-15
doc prose names lower_app's cross-module arm and synth_with_extras as
failure-mode targets — both now deleted (mir.2 / mir.1b). The pin's
protected invariant is still valid and green; the prose is stale and
wants a doc-honesty reword, left out of this iteration's footprint.
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|
Brummel
|
8bc2972594 |
spec: typed-mir — place lower_to_mir post-mono, correct one-engine framing
plan-recon flagged that monomorphise_workspace runs between check and codegen, and codegen lowers the post-mono workspace. The first draft of this spec placed lower_to_mir as the final phase of check_workspace (pre-mono) and claimed "nothing re-walks the AST". That is wrong on both counts: - Built pre-mono, MIR would not carry the monomorphic specialisations monomorphise_workspace appends — exactly the post-mono bodies codegen emits today — reintroducing the check↔codegen gap this milestone exists to close. - synth is a pure `&Term → Type` function and the authoring AST carries no node-ids, so MIR cannot be a side-table read off a check pass; it is built inline by a walk. The honest property is therefore not "no second walk" but "no second *engine*": codegen's synth_with_extras is a hand-copied mirror of synth that drifts (every raw-buf bug is a drift point). The milestone replaces the mirror with a single post-mono call to canonical synth, materialised as MIR. Corrections: architecture diagram and data flow now run check → lift → monomorphise → lower_to_mir; lower_to_mir is wrapped by a new front-end entry elaborate_workspace that subsumes the lift+mono orchestration the CLI does today; check_workspace stays for the diagnostics-only path (`ail check`). Node count fixed 27 → 17 Term variants (ast.rs:436). Re-dispatched grounding-check after the edit (post-PASS edit invalidates the prior report) — PASS, all load-bearing post-mono assumptions ratified against live code (main.rs build order, mono.rs synth use, 17-variant Term, no node-ids). |
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|
Brummel
|
207c63649f |
spec: typed-mir check→codegen boundary contract
Open a new milestone introducing a typed mid-level IR (`ailang-mir`) as the single artefact crossing the check → codegen boundary, so codegen re-derives nothing. Root cause (architect drift review): the boundary today carries no typed artefact. `crates/ail/src/main.rs:2293` calls `check_workspace`, discards the result, and hands `lower_workspace` the raw `Workspace`. `CheckedModule` (ailang-check/src/lib.rs:1283) carries only top-level (Type, hash). Codegen therefore re-runs four independent derivations of what check already proved — type synthesis (`synth_with_extras`), callee resolution (`type_home_module` ×3 + `is_static_callee`), uniqueness/mode (`infer_module_with_cross`, second run), and Str representation (`!is_str` recur gate). Every raw-buf bug (#43/#46/#47/#49/#51/#53, all "check-clean, build-divergent") is a point where one of those re-derivations disagreed with check and got patched one leg at a time. Honest framing: this is removal of a re-derivation architecture, not a RED→GREEN of crashing programs. #51 and #53 build today (patched by |