ww/test/lang/alias_idx_family_test.ww

// #5 alias arc F2a batch 1 (task #60 + #79 init-store
// rider): wwstage INDEX / SLICE / FOR-RANGE / LITERAL-INIT over an alias-NAMED
// base type, migrated from test/wcc/944_alias_idx_family_run.c (#5-C3). The
// tnode-keyed cgen walks saw only the N_TNAME leaf — esz fell to the
// 1-sentinel and the base classified as a POINTER (MOVQ + no IMULQ): SEGV on
// index/range, silent-wrong on slice, alias-[N]u32 literal-init stride-skew
// (#79). cstage reads everything off the chased stamped type and is the
// runtime-correct reference; the fix re-keys the ww sites off tichase'd
// tinfos and every row graduates to byte-id (ww aligned UP).
//
// Values exceed 255 so an esz=1 byte-load cannot pass by little-endian
// prefix-luck; readbacks assert the LAST element. The C driver ran each row
// on both stages + asserted cs==ww exit; here the cstage run is test-lang (T1)
// and the byte-id is test-lang-byteid (T2). The fwd-ref rows' decl-order
// dimension is subsumed by module-level resolution (already order-independent).
//
// Deliberately NOT pinned (g-fold #77/#78): any DIRECT alias-typed global
// ARRAY row (ww link-ERR / cs silent-wrong) — m7c_global2d's alias is on the
// ELEMENT and gslice_alias is a global alias SLICE, both of which resolve.

package alias_idx_family_test;

type arr = [4]int;
type arr2 = arr;
type sl = []int;
type sl2 = sl;
type a4 = [4]u32;
type a6 = [6]u32;
type arrk = [1024]int;
type slk = []int;
type slk2 = slk;
type row = [3]int;

let g_2d: [2]row = [[10: int, 20: int, 30: int], [40: int, 50: int, 60: int]];
let g_slice: sl = [1000: int, 2000: int, 3000: int];

@test fn idx0_ctl() void = {
	let a: [4]int = [1000: int, 2000: int, 3000: int, 4000: int];
	assert(a[3] == 4000);
	a[3] = 9999;
	assert(a[3] == 9999);
};

@test fn idx1_alias() void = {
	let a: arr = [1000: int, 2000: int, 3000: int, 4000: int];
	assert(a[2] == 3000);
	assert(a[3] == 4000);
	a[3] = 8888;
	assert(a[3] == 8888);
};

@test fn idx2_2level() void = {
	let a: arr2 = [1000: int, 2000: int, 3000: int, 4000: int];
	assert(a[2] == 3000);
	a[1] = 9999;
	assert(a[1] == 9999);
	assert(a[3] == 4000);
};

@test fn idx_fwdref() void = {
	let a: arr2 = [1000: int, 2000: int, 3000: int, 4000: int];
	assert(a[3] == 4000);
	a[3] += 500;
	assert(a[3] == 4500);
};

// #79: narrow-elem alias literal-init — pre-fix the per-element store rode the
// esz=8 sentinel + MOVQ over a stride-4 slot (saved-BP/RIP smash); LAST read.
@test fn init_u32_alias() void = {
	let a: a4 = [1: u32, 2: u32, 3: u32, 4: u32];
	assert(a[3] == 4);
	assert(a[0] == 1);
};

@test fn initrep_u32_alias() void = {
	let a: a6 = [7: u32...];
	assert(a[5] == 7);
	assert(a[0] == 7);
};

// uninit alias array + per-index loop fill; pins the bare-let classify (no
// composite zero-fill, cstage-identical).
@test fn loopfill_1024() void = {
	let a: arrk;
	let i: int = 0;
	for (i < 1024) {
		a[i] = i * 3 + 1000;
		i += 1;
	};
	assert(a[1023] == 1023 * 3 + 1000);
};

@test fn slice0_ctl() void = {
	let a: [4]int = [1000: int, 2000: int, 3000: int, 4000: int];
	let s: []int = a[1:3];
	assert(s.len == 2);
	assert(s[1] == 3000);
};

@test fn slice1_alias() void = {
	let a: arr = [1000: int, 2000: int, 3000: int, 4000: int];
	let s: sl = a[1:3];
	assert(s.len == 2);
	assert(s[0] == 2000);
	s[1] = 7777;
	assert(a[2] == 7777);
};

@test fn slice2_2level() void = {
	let a: [4]int = [1000: int, 2000: int, 3000: int, 4000: int];
	let s: sl2 = a[1:3];
	assert(s.len == 2);
	assert(s[0] == 2000);
	s[1] = 7777;
	assert(a[2] == 7777);
	assert(s[1] == 7777);
	let r: sl = s[0:2];
	assert(r.len == 2);
	assert(r[1] == 7777);
};

// 1000 elements, values 300..7293: an esz=1 byte load cannot land on the right
// word; LAST-elem readback breaks prefix-luck. Also pins alias default-hi
// (a[2:]), .cap via the chased cgbasecap leg, and range over the sub-slice.
@test fn slice1big() void = {
	let a: [1000]int;
	let i: int = 0;
	for (i < 1000) {
		a[i] = i * 7 + 300;
		i += 1;
	};
	let s: slk = a[1:1000];
	assert(s.len == 999);
	assert(s[998] == 999 * 7 + 300);
	s[998] = 123456;
	assert(a[999] == 123456);
	let t: slk2 = a[2:];
	assert(t.len == 998);
	assert(t.cap == 998);
	assert(t[997] == 123456);
	let cnt: int = 0;
	for (let x .. t) { cnt = cnt + 1; assert(x >= 0); };
	assert(cnt == 998);
};

@test fn slice_fwdref() void = {
	let a: arr2 = [1000: int, 2000: int, 3000: int, 4000: int];
	let s: sl2 = a[1:3];
	assert(s[1] == 3000);
	s[1] *= 3;
	assert(a[2] == 9000);
};

@test fn range0_ctl() void = {
	let a: [4]int = [1: int, 2: int, 3: int, 4: int];
	let sum: int = 0;
	for (let x .. a) { sum = sum + x; };
	assert(sum == 10);
};

@test fn range1_alias() void = {
	let a: arr = [1000: int, 2000: int, 3000: int, 4000: int];
	let sum: int = 0;
	for (let x .. a) { sum = sum + x; };
	assert(sum == 10000);
};

@test fn range2_2level() void = {
	let a: arr2 = [1000: int, 2000: int, 3000: int, 4000: int];
	let sum: int = 0;
	for (let x .. a) { sum = sum + x; };
	assert(sum == 10000);
};

@test fn range_slicealias() void = {
	let a: [4]int = [1000: int, 2000: int, 3000: int, 4000: int];
	let t: sl = a[0:4];
	let sum: int = 0;
	for (let x .. t) { sum = sum + x; };
	assert(sum == 10000);
};

// m7c: the BASE is a plain [2]row global — the alias sits on the ELEMENT
// (row = [3]int). elemisarrayc's node walk can't see through the element's
// N_TNAME, so g[0] loaded a VALUE where the sub-array ADDRESS was needed.
@test fn m7c_global2d() void = {
	assert(g_2d[0][0] == 10);
	assert(g_2d[1][2] == 60);
};

// GLOBAL alias-typed SLICE: DATA emit + .len + indexed read all resolve.
@test fn gslice_alias() void = {
	assert(g_slice.len == 3);
	assert(g_slice[2] == 3000);
};

// slice-of-alias-array as a CALL ARG exercises the pusharg N_SLICE leg, a
// distinct lowering from cgslice; plus inferred-let receive of an alias-base
// slice.
fn sumof(s: []int) int = {
	let t: int = 0;
	for (let x .. s) { t = t + x; };
	return t;
};

@test fn slicearg_alias() void = {
	let a: arr2 = [1000: int, 2000: int, 3000: int, 4000: int];
	let s = a[1:3];
	assert(s.len == 2);
	assert(s[1] == 3000);
	assert(sumof(a[0:4]) == 10000);
};