ww/test/wcc/944_alias_accept_run.c

/*
 * 944_alias_accept_run — #5 alias arc F1: cstage acceptance ALIGN-UP
 * through the transitive TY_NAMED chase (type_chase_named, promoted to
 * cmd/wcc/type.c). harec dealiases at every promotion/cond/assign
 * consumer (ref/harec/src/types.c:53 type_dealias; :989-996
 * type_is_assignable; src/check.c:1083-1105 type_promote; :2141 if,
 * :2515 for, :3229 &&/||, :3572 !) — wwstage already accepted these
 * shapes AND ran them Hare-right (F0 census /tmp/f0/livelist.md), so
 * the cstage single-peel rejects were the lean side aligned UP.
 *
 *   row                  | shape                                | want
 *   ---------------------+--------------------------------------+-----
 *   binop_alias_base     | myint + int (F0 m1_binop)            | 0
 *   binop_2level         | myint2 % int, myu / u32 (m1_binop2)  | 0
 *   ret_through_2level   | fn(x: myint2) int = x * 2            | 0
 *   assign_alias_alias   | k1 → k2 (same base; harec dealias-   |
 *                        | both admits)                         | 0
 *   binop_alias_vs_alias | k1 + k2 — cstage stays LOUD per      |
 *                        | harec type_promote ALIAS+ALIAS→NULL  | err(cs)
 *   cond_if/for/bang/    | alias-of-bool at every cond consumer |
 *   andor/fnparam        | (F0 m2_* family)                     | 0
 *   assert_stays_loud    | alias-bool assert — BOTH stages loud |
 *                        | (F0 2a DISSOLVED-SYMMETRIC; the Hare |
 *                        | widening is parked on #5)            | err
 *   dot_2level           | field access via a3=b3=c3=struct     |
 *                        | (task #70, ken c3_chain3)            | 0
 *   deref_alias_ptr      | *p through pi2=pi=*int               | 0
 *   idx/slice/range_     | index/slice/for-range over 2-level   |
 *   2level, slice_arg    | alias bases (F0 8b) — cs cgen index  |
 *                        | family chased (idx_eff + base        |
 *                        | classify); ww half landed (#60, F2a  |
 *                        | batch 1 tichase) — graduated K_RUN   | 0
 *   arg_2level_*         | task #61: alias-NAMED struct PARAM   |
 *                        | classify (fwd-ref / lit-init / 40B   |
 *                        | 5-eightbyte / f64 SSE class legs +   |
 *                        | base control)                        | 0
 *   float_alias_param* / | ken-v3 leg: 2-level f64/str/slice    |
 *   str_alias_2level /   | aliases at the cgen KIND classifiers |
 *   slice_alias_param    | (slice leg graduated, #60 F2a b1)    | 0
 *   slicefield_* /       | reviewer-F1 leg: 2-level alias of    |
 *   strfield_store_2lvl  | slice/str as a STRUCT FIELD type —   |
 *                        | cgen field gates chased (stores,     |
 *                        | struct-lit, walk leaves, reads);     |
 *                        | unprobed gates LOUD-tripwired (#73,  |
 *                        | K_BUILDERR_CS pin)                   | 0
 *   union_store_* +      | task #62 Layer-2 (cs half): alias-   |
 *   union_push_arg       | NAMED struct as union member — widen |
 *                        | store/push word0-only; CS-ONLY until |
 *                        | F2 lands the wwstage half; base ctl  |
 *                        | + the #54-bound `as` row pinned loud | 0(cs)
 *   nested_alias_field_* | task #71: alias-typed nested-field   |
 *                        | store/read/addr-of walks fold to     |
 *                        | direct offsets (byte-id graduation,  |
 *                        | both decl orders)                    | 0
 *
 * K_RUN rows also assert cstage/wwstage asm byte-id (acceptance
 * graduations land byte-identical — F0's accept side was wwstage).
 * K_RUN_CS / K_BUILDERR_CS rows run the cstage driver only, each
 * citing the task that graduates them. binop_alias_vs_alias is
 * CS-only loud: the wwstage checker stays silent on typed mismatches
 * by design (5-lite discipline) — cs pins the harec-parity reject.
 * NNN<950, self-contained (/tmp, no imports) — rule-14's selfhost-
 * sibling race does not apply (941/944 precedent).
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/wait.h>

static int
runwait(const char *cmd)
{
	int rc = system(cmd);
	if (rc == -1) return -1;
	if (WIFEXITED(rc)) return WEXITSTATUS(rc);
	return -1;
}

static int
slurp_eq(const char *a, const char *b)
{
	FILE *fa = fopen(a, "rb");
	FILE *fb = fopen(b, "rb");
	if (!fa || !fb) { if (fa) fclose(fa); if (fb) fclose(fb); return -1; }
	int rc = 0;
	for (;;) {
		int ca = fgetc(fa), cb = fgetc(fb);
		if (ca != cb) { rc = -1; break; }
		if (ca == EOF) break;
	}
	fclose(fa); fclose(fb);
	return rc;
}

#define K_RUN          0	/* build+run BOTH drivers, exit==want, + byte-id */
#define K_BUILDERR     1	/* build FAILS with experr on BOTH drivers */
#define K_RUN_CS       2	/* cstage only — ww half pending (cite at row) */
#define K_BUILDERR_CS  3	/* cstage-only loud (ww silent by design) */

struct row { const char *label; const char *src; int want;
             int kind; const char *experr; };

/* errlog_has — a BUILDERR row must fail WITH its diagnostic; any other
 * failure (parse error, crash, hang-kill) is a vacuous reject (940
 * precedent). */
static int
errlog_has(const char *path, const char *needle)
{
	FILE *f = fopen(path, "rb");
	if (!f) return 0;
	char buf[8192];
	size_t got = fread(buf, 1, sizeof buf - 1, f);
	fclose(f);
	buf[got] = '\0';
	return strstr(buf, needle) != NULL;
}

static const struct row rows[] = {
	{ "binop_alias_base",
	  "package main;\n"
	  "type myint = int;\n"
	  "export fn main() i32 = {\n"
	  "	let a: myint = 5;\n"
	  "	let b: int = 3;\n"
	  "	let c = a + b;\n"
	  "	if (c != 8) { return 1; };\n"
	  "	let d: myint = 2;\n"
	  "	if (a * d != 10) { return 2; };\n"
	  "	if (a < b) { return 3; };\n"
	  "	if (a - b != 2) { return 4; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "binop_2level",
	  "package main;\n"
	  "type myint = int;\n"
	  "type myint2 = myint;\n"
	  "type myu = u32;\n"
	  "export fn main() i32 = {\n"
	  "	let a: myint2 = 7;\n"
	  "	let b: int = 2;\n"
	  "	if (a % b != 1) { return 1; };\n"
	  "	let u: myu = 10: u32;\n"
	  "	let v: u32 = 3: u32;\n"
	  "	if (u / v != 3: u32) { return 2; };\n"
	  "	if (u + v != 13: u32) { return 3; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "ret_through_2level",
	  "package main;\n"
	  "type myint = int;\n"
	  "type myint2 = myint;\n"
	  "fn dbl(x: myint2) int = {\n"
	  "	return x * 2;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let a: myint2 = 21;\n"
	  "	if (dbl(a) != 42) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "assign_alias_alias",
	  "package main;\n"
	  "type k1 = int;\n"
	  "type k2 = int;\n"
	  "export fn main() i32 = {\n"
	  "	let x: k1 = 5;\n"
	  "	let y: k2 = x;\n"
	  "	if (y != 5) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	/* harec type_promote: ALIAS+ALIAS → NULL even on a shared base
	 * (ref/harec/src/check.c:1087-1089). wwstage's checker is silent
	 * on typed mismatches (5-lite) — cs-only pin. */
	{ "binop_alias_vs_alias",
	  "package main;\n"
	  "type k1 = int;\n"
	  "type k2 = int;\n"
	  "export fn main() i32 = {\n"
	  "	let x: k1 = 5;\n"
	  "	let y: k2 = 3;\n"
	  "	if (x + y != 8) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_BUILDERR_CS, "operands have differing types" },
	{ "cond_if",
	  "package main;\n"
	  "type myb = bool;\n"
	  "export fn main() i32 = {\n"
	  "	let b: myb = true;\n"
	  "	if (b) { return 0; };\n"
	  "	return 1;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "cond_for",
	  "package main;\n"
	  "type myb = bool;\n"
	  "export fn main() i32 = {\n"
	  "	let b: myb = true;\n"
	  "	let i: int = 0;\n"
	  "	for (b) {\n"
	  "		i = i + 1;\n"
	  "		if (i >= 3) { b = false; };\n"
	  "	};\n"
	  "	if (i != 3) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "cond_bang",
	  "package main;\n"
	  "type myb = bool;\n"
	  "export fn main() i32 = {\n"
	  "	let b: myb = false;\n"
	  "	let n = !b;\n"
	  "	if (!n) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "cond_andor",
	  "package main;\n"
	  "type myb = bool;\n"
	  "export fn main() i32 = {\n"
	  "	let b: myb = true;\n"
	  "	let c: myb = false;\n"
	  "	if (b && !c) { } else { return 1; };\n"
	  "	if (c || b) { } else { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "cond_fnparam",
	  "package main;\n"
	  "type myb = bool;\n"
	  "fn pick(b: myb) i32 = {\n"
	  "	if (b) { return 0; };\n"
	  "	return 1;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let b: myb = true;\n"
	  "	return pick(b);\n"
	  "};\n", 0, K_RUN, NULL },
	{ "assert_stays_loud",
	  "package main;\n"
	  "type myb = bool;\n"
	  "export fn main() i32 = {\n"
	  "	let b: myb = true;\n"
	  "	assert(b);\n"
	  "	return 0;\n"
	  "};\n", 0, K_BUILDERR, "assert: cond must be bool" },
	{ "dot_2level",
	  "package main;\n"
	  "type a3 = b3;\n"
	  "type b3 = c3;\n"
	  "type c3 = struct { x: size, y: size, z: size };\n"
	  "export fn main() i32 = {\n"
	  "	if (size(a3) != 24) { return 1; };\n"
	  "	if (size((void | a3)) != 32) { return 2; };\n"
	  "	let v: a3;\n"
	  "	v.x = 1; v.y = 2; v.z = 3;\n"
	  "	if (v.x + v.y + v.z != 6) { return 3; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "deref_alias_ptr",
	  "package main;\n"
	  "type pi = *int;\n"
	  "type pi2 = pi;\n"
	  "export fn main() i32 = {\n"
	  "	let v: int = 41;\n"
	  "	let p: pi2 = &v;\n"
	  "	if (*p != 41) { return 1; };\n"
	  "	*p = 7;\n"
	  "	if (v != 7) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	/* ---- reviewer-F1 find: 2-level alias of slice/str as a STRUCT
	 * FIELD type. The acceptance above admits every construction; the
	 * cgen FIELD-TYPE gates single-peeled, so the slice/str 3-word
	 * arms fell to word0-only scalar tails — SILENT wrong (ww correct,
	 * every shape LOUD at pristine 738d7f4 = opened by this commit).
	 * Chased gates: single-dot store (+via-ptr), struct-lit fill,
	 * chained store-walk leaf, chained-ptr-field store, single-dot /
	 * via-ptr / chained-walk reads. Each row pins one gate; the
	 * noise() call clobbers BX/CX so stale-register luck can't pass a
	 * word0-only header. Unprobed sibling gates are LOUD-tripwired,
	 * pinned by the #73 row at the end of this block. Rows whose
	 * `.len` readback rides the chained-dot READ walk entered as
	 * K_RUN_CS (runtime-correct both stages; cs took the generic
	 * spine) and graduated to K_RUN with the #71 walk chase. */
	{ "slicefield_store_2lvl",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "type box = struct { s: sl2, n: int };\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [700: int, 800: int, 900: int];\n"
	  "	let b: box;\n"
	  "	b.n = 5;\n"
	  "	b.s = a[0:3];\n"
	  "	if (b.n != 5) { return 9; };\n"
	  "	if (b.s[0] != 700) { return 1; };\n"
	  "	if (b.s[2] != 900) { return 2; };\n"
	  "	if (b.s.len != 3) { return 3; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "slicefield_range_2lvl",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "type box = struct { s: sl2, n: int };\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [700: int, 800: int, 900: int];\n"
	  "	let b: box;\n"
	  "	b.s = a[0:3];\n"
	  "	b.n = 5;\n"
	  "	if (b.s.len != 3) { return 1; };\n"
	  "	if (b.s[2] != 900) { return 2; };\n"
	  "	for (let x .. b.s) {\n"
	  "		if (x < 700) { return 3; };\n"
	  "	};\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "strfield_store_2lvl",
	  "package main;\n"
	  "type s1t = str;\n"
	  "type s2t = s1t;\n"
	  "type box = struct { s: s2t, n: int };\n"
	  "export fn main() i32 = {\n"
	  "	let b: box;\n"
	  "	b.s = \"hello\";\n"
	  "	b.n = 5;\n"
	  "	if (b.s.len != 5) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "slicefield_structlit_2lvl",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "type box = struct { s: sl2, n: int };\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [700: int, 800: int, 900: int];\n"
	  "	let b: box = box { s = a[0:3], n = 5: int };\n"
	  "	if (b.n != 5) { return 1; };\n"
	  "	if (b.s.len != 3) { return 2; };\n"
	  "	if (b.s[2] != 900) { return 3; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "slicefield_viaptr_2lvl",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "type box = struct { s: sl2, n: int };\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [700: int, 800: int, 900: int];\n"
	  "	let b: box;\n"
	  "	let p = &b;\n"
	  "	p.s = a[0:3];\n"
	  "	if (p.s.len != 3) { return 1; };\n"
	  "	if (p.s[2] != 900) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "slicefield_chainstore_2lvl",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "type inner = struct { s: sl2 };\n"
	  "type outer = struct { i: inner };\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [700: int, 800: int, 900: int];\n"
	  "	let v: outer;\n"
	  "	v.i.s = a[0:3];\n"
	  "	if (v.i.s.len != 3) { return 1; };\n"
	  "	if (v.i.s[2] != 900) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "slicefield_ptrchain_2lvl",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "type inner = struct { s: sl2, n: int };\n"
	  "type outer = struct { pi: *inner };\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [700: int, 800: int, 900: int];\n"
	  "	let i: inner;\n"
	  "	i.n = 1;\n"
	  "	let v: outer;\n"
	  "	v.pi = &i;\n"
	  "	v.pi.s = a[0:3];\n"
	  "	if (i.s.len != 3) { return 1; };\n"
	  "	if (i.s[2] != 900) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "slicefield_chainread_2lvl",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "type inner = struct { s: sl2 };\n"
	  "type outer = struct { i: inner };\n"
	  "fn noise(x: int) int = {\n"
	  "	return x * 7 + 3;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [700: int, 800: int, 900: int];\n"
	  "	let v: outer;\n"
	  "	v.i.s = a[0:3];\n"
	  "	let k = noise(9);\n"
	  "	if (k != 66) { return 9; };\n"
	  "	let w = v.i.s;\n"
	  "	if (w.len != 3) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "slicefield_ptrread_2lvl",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "type box = struct { s: sl2, n: int };\n"
	  "fn noise(x: int) int = {\n"
	  "	return x * 7 + 3;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [700: int, 800: int, 900: int];\n"
	  "	let b: box;\n"
	  "	b.s = a[0:3];\n"
	  "	let p = &b;\n"
	  "	let k = noise(9);\n"
	  "	if (k != 66) { return 9; };\n"
	  "	let w = p.s;\n"
	  "	if (w.len != 3) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	/* whole-field read into a local: cs runtime-correct post-chase
	 * (the clobbered-register r1b probe). The `let w = b.s` receive
	 * spine divergence noted at pristine 738d7f4 no longer
	 * reproduces at the F1-merged base, and ww's `w[i]` read (the
	 * task-#60 esz half) landed in F2a batch 1 — byte-id + 0/0
	 * verified, graduated K_RUN. */
	{ "slicefield_wholeread_2lvl",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "type box = struct { s: sl2, n: int };\n"
	  "fn noise(x: int) int = {\n"
	  "	return x * 7 + 3;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [700: int, 800: int, 900: int];\n"
	  "	let b: box;\n"
	  "	b.s = a[0:3];\n"
	  "	let k = noise(9);\n"
	  "	if (k != 66) { return 9; };\n"
	  "	let w = b.s;\n"
	  "	if (w.len != 3) { return 1; };\n"
	  "	if (w[2] != 900) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },	/* graduated: #60 (F2a batch 1) */
	/* #73 tripwire pin: the UNPROBED single-peel field gates
	 * (indexed-elem store/read, ptr-chain read, heap fill, tuple-elem
	 * read, static emit) hard-error on a 2+-level alias over an
	 * aggregate base instead of emitting a word0 tail. ww accepts and
	 * runs these — cs-only loud until #73's chase. 1-level controls
	 * verified per gate (/tmp/revF1 t*c probes). */
	{ "slicefield_idx_tripwire_73",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "type box = struct { s: sl2, n: int };\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [700: int, 800: int, 900: int];\n"
	  "	let xs: [2]box;\n"
	  "	xs[0].s = a[0:3];\n"
	  "	if (xs[0].s.len != 3) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_BUILDERR_CS,
	  "unswept single-peel gate (#73)" },
	/* Values >255 break the esz=1 prefix-luck; the write-then-read
	 * pins the IMULQ stride on both the read and write spines. */
	{ "idx_2level",
	  "package main;\n"
	  "type arr = [4]int;\n"
	  "type arr2 = arr;\n"
	  "export fn main() i32 = {\n"
	  "	let a: arr2 = [1000: int, 2000: int, 3000: int, 4000: int];\n"
	  "	if (a[2] != 3000) { return 1; };\n"
	  "	a[1] = 9999;\n"
	  "	if (a[1] != 9999) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },	/* graduated: #60 (F2a batch 1) */
	{ "slice_2level",
	  "package main;\n"
	  "type sl = []int;\n"
	  "type sl2 = sl;\n"
	  "export fn main() i32 = {\n"
	  "	let a: [4]int = [1000: int, 2000: int, 3000: int, 4000: int];\n"
	  "	let s: sl2 = a[1:3];\n"
	  "	if (s.len != 2) { return 1; };\n"
	  "	if (s[0] != 2000) { return 2; };\n"
	  "	s[1] = 7777;\n"
	  "	if (a[2] != 7777) { return 3; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },	/* graduated: #60 (F2a batch 1) */
	{ "range_2level",
	  "package main;\n"
	  "type arr = [4]int;\n"
	  "type arr2 = arr;\n"
	  "export fn main() i32 = {\n"
	  "	let a: arr2 = [1: int, 2: int, 3: int, 4: int];\n"
	  "	let sum: int = 0;\n"
	  "	for (let x .. a) {\n"
	  "		sum = sum + x;\n"
	  "	};\n"
	  "	if (sum != 10) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },	/* graduated: #60 (F2a batch 1) */
	{ "slice_of_alias_arg",
	  "package main;\n"
	  "type arr = [4]int;\n"
	  "type arr2 = arr;\n"
	  "fn sum(s: []int) int = {\n"
	  "	let t: int = 0;\n"
	  "	for (let x .. s) { t = t + x; };\n"
	  "	return t;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let a: arr2 = [1000: int, 2000: int, 3000: int, 4000: int];\n"
	  "	let s = a[1:3];\n"
	  "	if (s.len != 2) { return 1; };\n"
	  "	if (s[1] != 3000) { return 2; };\n"
	  "	if (sum(a[0:4]) != 10000) { return 3; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },	/* graduated: #60 (F2a batch 1) */
	/* ---- ken-v3 leg: the acceptance align above opens 2-level
	 * float/str/slice aliases to the cgen KIND classifiers
	 * (cg_isfloat/type_isf32/fld_isfloat/type_isstr/type_isslice),
	 * whose single peel classed them scalar/INT — the f64-alias param
	 * would read the wrong register class (cs exit 1 SILENT, ww
	 * correct). The classifiers chase IN THIS SAME COMMIT so the
	 * widening never ships a loud->silent flip (rule 7; ken root-
	 * verify /tmp/ken_f1, his v3 row below). */
	{ "float_alias_param_kenv3",
	  "package main;\n"
	  "type fa = fb;\n"
	  "type fb = f64;\n"
	  "fn take(x: fa) f64 = {\n"
	  "	return x * 2.0;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	if (take(1.5) != 3.0) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "float_alias_param",
	  "package main;\n"
	  "type f1t = f64;\n"
	  "type f2t = f1t;\n"
	  "fn half(x: f2t) f64 = {\n"
	  "	return x / 2.0;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let v: f2t = 5.0;\n"
	  "	if (half(v) != 2.5) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "str_alias_2level",
	  "package main;\n"
	  "type s1t = str;\n"
	  "type s2t = s1t;\n"
	  "fn taillen(s: s2t) int = {\n"
	  "	return (s.len: int);\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let v: s2t = \"hello\";\n"
	  "	if (v.len != 5) { return 1; };\n"
	  "	if (taillen(v) != 5) { return 2; };\n"
	  "	let w: s2t = v;\n"
	  "	if (w.len != 5) { return 3; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	/* slice leg: cs classify fixed; the ww half of the indexed read
	 * (task-#60 esz family) landed in F2a batch 1. Values >255
	 * break the esz=1 prefix-luck. */
	{ "slice_alias_param",
	  "package main;\n"
	  "type b1 = []int;\n"
	  "type b2 = b1;\n"
	  "fn first(s: b2) int = {\n"
	  "	return s[0];\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let a: [3]int = [1000: int, 2000: int, 3000: int];\n"
	  "	let s: b2 = a[0:3];\n"
	  "	if (first(s) != 1000) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },	/* graduated: #60 (F2a batch 1) */
	/* ---- task #61: cstage alias-NAMED struct PARAM classify.
	 * The single peel classified a 2-level-alias param SCALAR: caller
	 * pushed and callee spilled ONE eightbyte, fields read saved-BP/
	 * return-address garbage (F0 m5_arg/m8b_arg1lit, cs exit 1 SILENT,
	 * ww correct). Fix = struct_arg_size/aggarg_size/struct_float_
	 * class + the prologue classify chase. Values are distinct and the
	 * LAST field is always checked (multi-eightbyte exit-checked). */
	{ "arg_2level_fwdref",
	  "package main;\n"
	  "type ali = base;\n"
	  "type base = struct { a: size, b: size, c: size };\n"
	  "fn take(s: ali) size = {\n"
	  "	return s.a + s.b + s.c;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let x: ali;\n"
	  "	x.a = 4; x.b = 9; x.c = 13;\n"
	  "	if (take(x) != 26) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "arg_2level_litinit",
	  "package main;\n"
	  "type st = struct { a: size, b: size, c: size };\n"
	  "type row = st;\n"
	  "fn take(s: row) size = {\n"
	  "	return s.a + s.b + s.c;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let x: st = st { a = 4: size, b = 9: size, c = 13: size };\n"
	  "	if (take(x) != 26) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	/* 40B struct: 5 GP eightbytes through the aggarg (>16B) leg. */
	{ "arg_2level_5word",
	  "package main;\n"
	  "type big = struct { a: size, b: size, c: size, d: size, e: size };\n"
	  "type big2 = big;\n"
	  "fn take(s: big2) size = {\n"
	  "	return s.a + s.e;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let v: big2;\n"
	  "	v.a = 1000; v.b = 2; v.c = 3; v.d = 4; v.e = 5000;\n"
	  "	if (take(v) != 6000) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	/* f64-bearing 16B struct: the struct_float_class SSE leg. */
	{ "arg_2level_floatclass",
	  "package main;\n"
	  "type fs = struct { x: f64, n: size };\n"
	  "type fs2 = fs;\n"
	  "fn take(s: fs2) size = {\n"
	  "	if (s.x != 2.5) { return 99; };\n"
	  "	return s.n;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let v: fs2;\n"
	  "	v.x = 2.5; v.n = 7;\n"
	  "	if (take(v) != 7) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	/* control: base-named param spelling stays green + byte-id. */
	{ "arg_base_control",
	  "package main;\n"
	  "type base = struct { a: size, b: size, c: size };\n"
	  "fn take(s: base) size = {\n"
	  "	return s.a + s.b + s.c;\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let x: base;\n"
	  "	x.a = 4; x.b = 9; x.c = 13;\n"
	  "	if (take(x) != 26) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	/* ---- task #62 Layer-2 (cstage half): alias-NAMED struct as a
	 * UNION MEMBER. The widen store/push su single peel fell past the
	 * struct arm to the scalar arm — word0-only payload (the banked
	 * rows /tmp/impl62r_layer2_rows.md; both-wrong-identical with
	 * wwstage at normal decl order = gate-blind byte-id). CS-ONLY
	 * until F2 routes wwstage rhsstructpayload/push through
	 * structlookupchain — flip these to K_RUN then. Values distinct
	 * per word; the LAST payload word is always checked. */
	{ "union_store_norm",	/* banked row L2-1 (= F0 m5b_match1) */
	  "package main;\n"
	  "type base = struct { a: size, b: size };\n"
	  "type ali = base;\n"
	  "export fn main() i32 = {\n"
	  "	let x: ali;\n"
	  "	x.a = 4; x.b = 9;\n"
	  "	let v: (void | ali) = x;\n"
	  "	match (v) {\n"
	  "	case let s: ali => {\n"
	  "		if (s.a != 4) { return 1; };\n"
	  "		if (s.b != 9) { return 2; };\n"
	  "	};\n"
	  "	case void => { return 3; };\n"
	  "	};\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN_CS, NULL },	/* ww: task #62 F2 */
	{ "union_store_fwd",	/* banked row L2-2 (= F0 m5_match) */
	  "package main;\n"
	  "type ali = base;\n"
	  "type base = struct { a: size, b: size };\n"
	  "export fn main() i32 = {\n"
	  "	let x: ali;\n"
	  "	x.a = 4; x.b = 9;\n"
	  "	let v: (void | ali) = x;\n"
	  "	match (v) {\n"
	  "	case let s: ali => {\n"
	  "		if (s.a != 4) { return 1; };\n"
	  "		if (s.b != 9) { return 2; };\n"
	  "	};\n"
	  "	case void => { return 3; };\n"
	  "	};\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN_CS, NULL },	/* ww: task #62 F2 */
	{ "union_store_3word",	/* banked row L2-4: pins the width LOOP */
	  "package main;\n"
	  "type base = struct { a: size, b: size, c: size };\n"
	  "type ali = base;\n"
	  "export fn main() i32 = {\n"
	  "	let x: ali;\n"
	  "	x.a = 4; x.b = 9; x.c = 3;\n"
	  "	let v: (void | ali) = x;\n"
	  "	match (v) {\n"
	  "	case let s: ali => {\n"
	  "		if (s.a != 4) { return 1; };\n"
	  "		if (s.c != 3) { return 2; };\n"
	  "	};\n"
	  "	case void => { return 3; };\n"
	  "	};\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN_CS, NULL },	/* ww: task #62 F2 */
	{ "union_push_arg",	/* the cg_widen_tagged_push twin (F1 find) */
	  "package main;\n"
	  "type base = struct { a: size, b: size };\n"
	  "type ali = base;\n"
	  "fn peek(v: (void | ali)) size = {\n"
	  "	match (v) {\n"
	  "	case let s: ali => { return s.b; };\n"
	  "	case void => { return 0; };\n"
	  "	};\n"
	  "};\n"
	  "export fn main() i32 = {\n"
	  "	let x: ali;\n"
	  "	x.a = 4; x.b = 9;\n"
	  "	if (peek(x) != 9) { return 1; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN_CS, NULL },	/* ww: task #62 F2 */
	/* banked row L2-5: the m5b_match0 gold invariant — base spelling
	 * indistinguishable (ken oracle PART 1.7). */
	{ "union_store_base_ctl",
	  "package main;\n"
	  "type base = struct { a: size, b: size, c: size };\n"
	  "export fn main() i32 = {\n"
	  "	let x: base;\n"
	  "	x.a = 4; x.b = 9; x.c = 3;\n"
	  "	let v: (void | base) = x;\n"
	  "	match (v) {\n"
	  "	case let s: base => {\n"
	  "		if (s.a != 4) { return 1; };\n"
	  "		if (s.c != 3) { return 2; };\n"
	  "	};\n"
	  "	case void => { return 3; };\n"
	  "	};\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	/* ---- task #71 (rob probe-ruled F1 enrollment): nested fields
	 * whose TYPES are aliases. The chained-dot store/read/addr-of
	 * walks single-peeled each hop, aborted on the alias, and fell
	 * to the generic PUSHQ/LEAQ/ADDQ/POPQ address spine — runtime-
	 * correct but byte-id NO vs wwstage's folded direct offsets.
	 * Chasing the walks converges cs onto the direct arm = ww's asm.
	 * Distinct values; the LAST field of the SECOND member checked. */
	{ "nested_alias_field_norm",
	  "package main;\n"
	  "type fa = inner;\n"
	  "type inner = struct { a: size, b: size };\n"
	  "type outer = struct { x: fa, y: fa };\n"
	  "export fn main() i32 = {\n"
	  "	let v: outer;\n"
	  "	v.x.a = 4; v.x.b = 9;\n"
	  "	v.y.a = 7; v.y.b = 3;\n"
	  "	if (v.x.b != 9) { return 1; };\n"
	  "	if (v.y.b != 3) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	{ "nested_alias_field_fwd",
	  "package main;\n"
	  "type outer = struct { x: fa, y: fa };\n"
	  "type fa = inner;\n"
	  "type inner = struct { a: size, b: size };\n"
	  "export fn main() i32 = {\n"
	  "	let v: outer;\n"
	  "	v.x.a = 4; v.x.b = 9;\n"
	  "	v.y.a = 7; v.y.b = 3;\n"
	  "	if (v.x.b != 9) { return 1; };\n"
	  "	if (v.y.b != 3) { return 2; };\n"
	  "	let pa = &v.y.b;\n"
	  "	*pa = 11;\n"
	  "	if (v.y.b != 11) { return 3; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_RUN, NULL },
	/* banked row L2-3 (`v as ali` readback) trips task #54's as-binding
	 * aggregate-init bound — LOUD both stages today; fold the row into
	 * #54's pin set on its fold (do not drop). Pinned here as the
	 * loud-both bound so a silent regression can't hide. */
	{ "union_as_bound_54",
	  "package main;\n"
	  "type base = struct { a: size, b: size };\n"
	  "type ali = base;\n"
	  "export fn main() i32 = {\n"
	  "	let x: ali;\n"
	  "	x.a = 4; x.b = 9;\n"
	  "	let v: (void | ali) = x;\n"
	  "	if (!(v is ali)) { return 1; };\n"
	  "	let w = v as ali;\n"
	  "	if (w.b != 9) { return 2; };\n"
	  "	return 0;\n"
	  "};\n", 0, K_BUILDERR,
	  "aggregate init from unhandled rhs shape" },
};

static int
run_driver(const char *driver, const struct row *r, int i)
{
	char src[96], tmpdir[96], errf[96], cmd[1024];
	snprintf(src, sizeof src, "/tmp/aac_%d_%d.ww", getpid(), i);
	snprintf(tmpdir, sizeof tmpdir, "/tmp/aac_%d_d_%d", getpid(), i);
	snprintf(errf, sizeof errf, "/tmp/aac_%d_e_%d", getpid(), i);

	FILE *f = fopen(src, "wb");
	if (!f) return -1;
	fputs(r->src, f);
	fclose(f);

	mkdir(tmpdir, 0755);
	snprintf(cmd, sizeof cmd,
	    "cd %s && timeout 20 %s build %s >/dev/null 2>%s",
	    tmpdir, driver, src, errf);
	int brc = runwait(cmd);
	if (r->kind == K_BUILDERR || r->kind == K_BUILDERR_CS) {
		int ok = (brc != 0)
		    && (r->experr == NULL || errlog_has(errf, r->experr));
		if (!ok)
			fprintf(stderr, "row[%s]: %s expected loud builderr "
			    "\"%s\" (brc=%d)\n", r->label, driver,
			    r->experr ? r->experr : "", brc);
		unlink(src); unlink(errf); rmdir(tmpdir);
		return ok ? 0 : 1;
	}
	if (brc != 0) {
		fprintf(stderr, "row[%s]: build via %s failed\n",
		    r->label, driver);
		unlink(src); unlink(errf); rmdir(tmpdir);
		return -1;
	}

	const char *base = strrchr(src, '/');
	base = base ? base + 1 : src;
	char outbin[256];
	snprintf(outbin, sizeof outbin, "%s/%s", tmpdir, base);
	char *dot = strrchr(outbin, '.');
	if (dot && strcmp(dot, ".ww") == 0) *dot = '\0';
	int got = runwait(outbin);

	unlink(src); unlink(outbin); unlink(errf); rmdir(tmpdir);
	if (got != r->want) {
		fprintf(stderr, "row[%s]: %s exit %d, want %d\n",
		    r->label, driver, got, r->want);
		return 1;
	}
	return 0;
}

static int
asm_byte_identical(const char *bin, const struct row *r, int i)
{
	char src[96], cs[96], ws[96], cmd[1024];
	snprintf(src, sizeof src, "/tmp/aac_asm_%d_%d.ww", getpid(), i);
	snprintf(cs,  sizeof cs,  "/tmp/aac_asm_%d_%d_c.s", getpid(), i);
	snprintf(ws,  sizeof ws,  "/tmp/aac_asm_%d_%d_w.s", getpid(), i);

	FILE *f = fopen(src, "wb");
	if (!f) return -1;
	fputs(r->src, f);
	fclose(f);

	snprintf(cmd, sizeof cmd, "%s/w6c -o %s %s 2>/dev/null", bin, cs, src);
	if (runwait(cmd) != 0) {
		fprintf(stderr, "row[%s]: w6c errored\n", r->label);
		unlink(src);
		return -1;
	}
	snprintf(cmd, sizeof cmd, "%s/w6c_ww -o %s %s 2>/dev/null",
	    bin, ws, src);
	if (runwait(cmd) != 0) {
		fprintf(stderr, "row[%s]: w6c_ww errored\n", r->label);
		unlink(src); unlink(cs);
		return -1;
	}
	int rc = slurp_eq(cs, ws);
	if (rc != 0)
		fprintf(stderr, "row[%s]: cstage vs wwstage asm differs\n",
		    r->label);
	unlink(src); unlink(cs); unlink(ws);
	return rc;
}

int
main(void)
{
	const char *bin = getenv("BIN");
	if (!bin) bin = "out/bin";
	char absbin[2080];
	if (bin[0] != '/') {
		char cwd[1024];
		if (getcwd(cwd, sizeof cwd) == NULL) return 1;
		snprintf(absbin, sizeof absbin, "%s/%s", cwd, bin);
		bin = absbin;
	}

	char cdrv[2120], wdrv[2120];
	snprintf(cdrv, sizeof cdrv, "%s/ww", bin);
	snprintf(wdrv, sizeof wdrv, "%s/ww_ww", bin);

	int n = (int)(sizeof rows / sizeof rows[0]);
	int total = 0, fail = 0;

	for (int i = 0; i < n; i++) {
		total++;
		if (run_driver(cdrv, &rows[i], i) != 0) fail++;
	}
	if (access(wdrv, X_OK) == 0) {
		for (int i = 0; i < n; i++) {
			if (rows[i].kind == K_RUN_CS
			    || rows[i].kind == K_BUILDERR_CS)
				continue;
			total++;
			if (run_driver(wdrv, &rows[i], i) != 0) fail++;
		}
		for (int i = 0; i < n; i++) {
			if (rows[i].kind != K_RUN)
				continue;
			total++;
			if (asm_byte_identical(bin, &rows[i], i) != 0) fail++;
		}
	}

	if (fail) {
		fprintf(stderr, "alias_accept: %d/%d checks failed\n",
		    fail, total);
		return 1;
	}
	printf("alias_accept: %d/%d ok\n", total, total);
	return 0;
}