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wcc/ww: .wwi separate-compile consumer — w6c -c codegen filter (#22 M3)

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New `w6c -c` (both stages): separate-compile / primary-only codegen.
Emit code+DATA ONLY for a package's own (imported==0) decls; treat every
`.wwi`-sourced (imported==1) dep decl as an external. Pure addition behind
the flag — combined.ww stays the LIVE path, `-c` is off on every existing
invocation, so the 990-997 byte-id gates + all prior tests are unperturbed.

The keystone (rob): a `.wwi` is body-less/init-less prototype source, and
cgen already skips body-less fns as externs, so dep fns/types/defs emit
NOTHING for free. The single genuinely-new guard is an imported value-
global (`export let`): its DATAW would DUPLICATE the dep's own definition
(link collision), so it is skipped. The `imported==0` gate is applied at
all top-level emit sites for uniformity (close-by-construction): the fn
loop, emit_lets/emitletdataw, emit_defs/emitdefconstants, and
let_pre_intern/letpreintern — that last one because an imported dep's body
initializer interns strlits while its rhs-stripped `.wwi` does not, which
would shift the _S_ sequence; gating it keeps the strlit table a pure
function of the package's own decls. EXACTLY symmetric with M2's producer
`imported==0` filter — same predicate both directions.

Driver `--sep` build_one_sep + per-package archives + multi-.a link +
cache + BROAD real-target dual-path soak are M3-tail (#46, rob ruling B):
M3-core ships the codegen spine + a self-contained gate that proves all
codegen correctness without a production driver.

Gate 989_m3sep_run: a synth leaf->mid->root fixture carrying all four
cross-boundary fact-classes (fn signature, struct LAYOUT, `def` const
VALUE, `export let` value-global). Per package, holding `-c` constant:
`w6c -c` of (deps-as-bodies) == (deps-as-.wwi) byte-for-byte (the .wwi
conveys exactly the dep facts P's codegen needs); cs==ww at the .s AND
final-exe level (rule 10); sep-path determinism; the value-global guard
(imported origin_tag never re-emits DATAW); and behavioral identity (the
linked program's exit code is the real cross-boundary computation). COLD:
.wwi materialized fresh every run (no warm cache).

combined.ww regen'd for wwdump + w6c (both embed cgen.ww); diff is exactly
the four guards + the flag wiring, nothing spurious.
This commit is contained in:
Hojun-Cho
2026-06-15 22:00:13 +09:00
parent e8d3d89fef
commit 13e5e35f81
10 changed files with 608 additions and 9 deletions
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8
selfhost/cmd/w6c/main.ww
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@@ -82,6 +82,9 @@ export fn main(argc: i32, argv: **u8) i32 = {
let out: *u8 = nil;
let wwiout: *u8 = nil; // -I <out.wwi>: M2 export-data producer
let testmode: i32 = 0i32; // #15: `-T` test-mode
let sepmode: i32 = 0i32; // -c: #22 M3 separate-compile / primary-
// only codegen (emit imported==0 decls
// only; treat `.wwi` deps as external)
let i: i32 = 1;
for (i < argc) {
@@ -104,6 +107,8 @@ export fn main(argc: i32, argv: **u8) i32 = {
wwiout = argv[i];
} else { if (cstreq(a, "-T")) {
testmode = 1i32;
} else { if (cstreq(a, "-c")) {
sepmode = 1i32;
} else { if (a[0u64] == 45u8) {
let m: str = "w6c: unknown flag\n";
os.write(2, m.ptr, m.len: u64);
@@ -115,7 +120,7 @@ export fn main(argc: i32, argv: **u8) i32 = {
return 2;
};
src = a;
}; }; }; };
}; }; }; }; };
i += 1;
};
@@ -194,6 +199,7 @@ export fn main(argc: i32, argv: **u8) i32 = {
let cg: cgen;
cgeninit(&cg);
cg.sepmode = sepmode;
cgfile(&cg, f);
return 0;
};