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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
cmd/w6c/main.c
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@@ -35,6 +35,9 @@ main(int argc, char **argv)
const char *out = NULL;
const char *wwiout = NULL; /* -I <out.wwi>: M2 export-data producer */
int testmode = 0;
int sepmode = 0; /* -c: #22 M3 separate-compile / primary-
* only codegen (emit imported==0 decls
* only; treat `.wwi` deps as external) */
for (int i = 1; i < argc; i++) {
const char *a = argv[i];
if (strcmp(a, "-o") == 0 && i + 1 < argc) {
@@ -43,6 +46,8 @@ main(int argc, char **argv)
wwiout = argv[++i];
} else if (strcmp(a, "-T") == 0) {
testmode = 1;
} else if (strcmp(a, "-c") == 0) {
sepmode = 1;
} else if (a[0] == '-') {
fprintf(stderr, "w6c: unknown flag %s\n", a);
return 2;
@@ -54,7 +59,7 @@ main(int argc, char **argv)
}
}
if (src == NULL) {
fputs("usage: w6c [-T] [-o out.s] file.ww\n", stderr);
fputs("usage: w6c [-T] [-c] [-I out.wwi] [-o out.s] file.ww\n", stderr);
return 2;
}
@@ -104,6 +109,7 @@ main(int argc, char **argv)
}
cg_init(&cg, a);
cg.sep_mode = sepmode;
cg_file(&cg, of, file);
if (of != stdout) fclose(of);