/* * 813_arrlit_infer_elem_run — #103 + #108 (+ #104 + the m8_slice * acceptance gap): an INFERRED let defaults its untyped-int to `int` * (8B machine word) on BOTH stages, byte-identically and at runtime. * * THE BUG (cstage was the truncating side — #263 polarity): * cstage type_default(TY_UNTYPED_INT) returned ty_i32 (4B). For a * scalar `let x = ` and an inferred array `let a = [, ...]` * (no annotation) the literal defaulted to i32 — silently TRUNCATING * any value > 2^31 (5000000000 → 705032704) and striding arrays at 4. * wwstage kept the element as raw untyped_int (size 0), which sized * INCONSISTENTLY across cgen consumers: the array STORE strode the 8 * sentinel (so the value width was right) but letslotsize under- * allocated the frame (SEGV) and cgindex strode the READ at 1 — so * `let a = [..]` SEGV'd on wwstage and the scalar ran correct only by * the 8B-store accident. The two stages were each wrong differently. * * THE FIX (one root, both stages, FUSE): * - cstage type.c type_default(TY_UNTYPED_INT) i32 -> int; the empty * arrlit fallback check.c ty_i32 -> ty_int (symmetric, count-0 * neutral). int = machine word = 8B (Go-style; MEMORY * project_int_machine_word_derived_limits) — Hare lowers a flexible * iconst to `int`, never a fixed i32 (ref/harec/src/types.c:835). * - wwstage check.ww exprtype N_ARRLIT: default the inferred * element's UNTYPED flavor to its concrete type (untyped_int->int, * _float->f64, _str->str, _rune->rune, _bool->bool), the empty-elt * fallback "i32"->"int", and stamp the synthesized N_TARRAY's * .type_ — so slotsize / elemsizeofc / letslotsize all read its * real [N]int size (32 for [4]int), routing through the type table * (rule-13) instead of the nil/0/sentinel fallbacks. SSoT — no * letslotsize special-case. * * POLARITY TEETH: the wide rows use 5000000000 ( > 2^31). A small-value * row would pass both stages by luck (gate-blind); only a > 2^31 value * distinguishes the truncating i32 default from the correct int. * * COVERAGE — the two direct repros plus the FIVE corpus movers ken's v2 * re-census named (each converges 0/0 byte-id + run-correct, NONE * both-wrong): m2_while (#108 scalar, alias-bool loop), m8_range1/2 * (#104 for-range elem over alias / 2-level-alias array), m8_slice1/2 * (#103 SEGV + slice-init acceptance over alias / 2-level-alias slice). * Plus the annotated controls [4]i32 (stride-4) and [4]int (stride-8), * which the fix must leave byte-identical — it touches ONLY the inferred * untyped default, never an explicit element type. * * row | shape | want * -----------------+---------------------------------------------+----- * arr_wide | let a=[5e9,2,3,4]; a[0]==5e9 && a[3]==4 | 0 * scalar_wide | let x=5e9; x==5e9 (#108 teeth) | 0 * arr_small | let a=[10,20,30,40]; a[2] | 30 * m2_while | #108 scalar via alias-bool loop counter | 0 * m8_range1 | #104 for-range elem over alias [4]int | 0 * m8_range2 | #104 for-range elem over 2-level-alias | 0 * m8_slice1 | #103 inferred a + slice s:sl=a[1:3] | 0 * m8_slice2 | #103 + 2-level-alias slice + re-slice | 0 * ctrl_i32 | let a:[4]i32=[1,2,3,4]; a[3] (stride-4) | 4 * ctrl_int | let a:[4]int=[1,2,3,4]; a[3] (stride-8) | 4 * * EACH ROW CARRIES THREE DIMENSIONS (684/802 model): * (a) cstage `ww build` + run, asserting the exit — pins the converged * asm is runtime-correct (real values, no truncation/SEGV). * (b) wwstage `ww_ww build` + run (gated on w6c_ww) — pins the ww SEGV * is gone and the value round-trips. * (c) w6c vs w6c_ww `.s` cmp — FAILS if the stages diverge (rule-10). * * GATE POLARITY: must stay GREEN. A wrong exit means the inferred * default regressed to a truncating/under-strided type; a byte-id FAIL * means the stages diverged. */ #include #include #include #include #include #include static int runwait(const char *cmd) { int rc = system(cmd); if (rc == -1) return -1; if (WIFEXITED(rc)) return WEXITSTATUS(rc); return -1; } struct row { const char *label; const char *src; int want; }; static const struct row rows[] = { /* #103 array, > 2^31 element — truncation + frame teeth. */ { "arr_wide", "package main;\n" "export fn main() i32 = {\n" "\tlet a = [5000000000, 2, 3, 4];\n" "\tif (a[0] != 5000000000) { return 1; };\n" "\tif (a[3] != 4) { return 2; };\n" "\treturn 0;\n" "};\n", 0 }, /* #108 scalar, > 2^31 — the cstage general truncation teeth. */ { "scalar_wide", "package main;\n" "export fn main() i32 = {\n" "\tlet x = 5000000000;\n" "\tif (x != 5000000000) { return 1; };\n" "\treturn 0;\n" "};\n", 0 }, /* basic inferred array — frame + stride sanity (mutation: a wrong * stride/slot reads a neighbouring word, not 30). */ { "arr_small", "package main;\n" "export fn main() i32 = {\n" "\tlet a = [10, 20, 30, 40];\n" "\treturn a[2]: i32;\n" "};\n", 30 }, /* corpus mover m2_while (#108 scalar via an alias-bool loop). */ { "m2_while", "package main;\n" "type myb = bool;\n" "export fn main() i32 = {\n" "\tlet b: myb = true;\n" "\tlet i = 0;\n" "\tfor (b) {\n" "\t\ti = i + 1;\n" "\t\tif (i >= 3) { b = false; };\n" "\t};\n" "\tif (i != 3) { return 1; };\n" "\treturn 0;\n" "};\n", 0 }, /* corpus mover m8_range1 (#104 for-range elem over alias array). */ { "m8_range1", "package main;\n" "type arr = [4]int;\n" "export fn main() i32 = {\n" "\tlet a: arr = [1, 2, 3, 4];\n" "\tlet sum = 0;\n" "\tfor (let x .. a) {\n" "\t\tsum = sum + x;\n" "\t};\n" "\tif (sum != 10) { return 1; };\n" "\treturn 0;\n" "};\n", 0 }, /* corpus mover m8_range2 (#104 for-range elem over 2-level alias). */ { "m8_range2", "package main;\n" "type arr = [4]int;\n" "type arr2 = arr;\n" "export fn main() i32 = {\n" "\tlet a: arr2 = [1, 2, 3, 4];\n" "\tlet sum = 0;\n" "\tfor (let x .. a) {\n" "\t\tsum = sum + x;\n" "\t};\n" "\tif (sum != 10) { return 1; };\n" "\treturn 0;\n" "};\n", 0 }, /* corpus mover m8_slice1 (#103 inferred array + alias-slice init). */ { "m8_slice1", "package main;\n" "type sl = []int;\n" "export fn main() i32 = {\n" "\tlet a = [10, 20, 30, 40];\n" "\tlet s: sl = a[1:3];\n" "\tif (s.len != 2) { return 1; };\n" "\tif (s[0] != 20) { return 2; };\n" "\tif (s[1] != 30) { return 3; };\n" "\treturn 0;\n" "};\n", 0 }, /* corpus mover m8_slice2 (#103 + 2-level-alias slice + re-slice). */ { "m8_slice2", "package main;\n" "type sl = []int;\n" "type sl2 = sl;\n" "export fn main() i32 = {\n" "\tlet a = [10, 20, 30, 40];\n" "\tlet s: sl2 = a[1:3];\n" "\tif (s.len != 2) { return 1; };\n" "\tif (s[0] != 20) { return 2; };\n" "\tlet t = s[0:1];\n" "\tif (t[0] != 20) { return 3; };\n" "\treturn 0;\n" "};\n", 0 }, /* CONTROL: annotated [4]i32 — must stay i32/stride-4, byte-id, * UNTOUCHED by the inferred-default fix. */ { "ctrl_i32", "package main;\n" "export fn main() i32 = {\n" "\tlet a: [4]i32 = [1, 2, 3, 4];\n" "\treturn a[3];\n" "};\n", 4 }, /* CONTROL: annotated [4]int — int/stride-8, byte-id. */ { "ctrl_int", "package main;\n" "export fn main() i32 = {\n" "\tlet a: [4]int = [1, 2, 3, 4];\n" "\treturn a[3]: i32;\n" "};\n", 4 }, }; static int run_driver(const char *driver, const struct row *r, int i) { char src[64], tmpdir[80], cmd[1024]; snprintf(src, sizeof src, "/tmp/aie_%d_%d.ww", getpid(), i); snprintf(tmpdir, sizeof tmpdir, "/tmp/aie_%d_d_%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 && %s build %s 2>/dev/null", tmpdir, driver, src); if (runwait(cmd) != 0) { fprintf(stderr, "row[%s]: build via %s failed\n", r->label, driver); unlink(src); rmdir(tmpdir); return -1; } const char *base = strrchr(src, '/'); base = base ? base + 1 : src; char outbin[160]; 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); rmdir(tmpdir); return got; } /* asm_byte_identical — w6c vs w6c_ww .s for the same source must match. */ static int asm_byte_identical(const char *bin, const struct row *r, int i) { char src[64], cs[72], ws[72], cmd[1024]; snprintf(src, sizeof src, "/tmp/aie_asm_%d_%d.ww", getpid(), i); snprintf(cs, sizeof cs, "/tmp/aie_asm_%d_%d_c.s", getpid(), i); snprintf(ws, sizeof ws, "/tmp/aie_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; } FILE *fc = fopen(cs, "rb"); FILE *fw = fopen(ws, "rb"); int rc = 0; if (!fc || !fw) { rc = -1; } else { for (;;) { int a = fgetc(fc); int b = fgetc(fw); if (a != b) { rc = -1; break; } if (a == EOF) break; } } if (fc) fclose(fc); if (fw) fclose(fw); 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[1024]; 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[1100], wdrv[1100]; snprintf(cdrv, sizeof cdrv, "%s/ww", bin); snprintf(wdrv, sizeof wdrv, "%s/ww_ww", bin); struct { const char *name; const char *path; int gated; } drivers[] = { { "cstage", cdrv, 0 }, { "wwstage", wdrv, 1 }, { NULL, NULL, 0 }, }; int n = (int)(sizeof rows / sizeof rows[0]); int total = 0, fail = 0; for (int d = 0; drivers[d].name; d++) { if (drivers[d].gated && access(drivers[d].path, X_OK) != 0) { fprintf(stderr, "arrlit_infer_elem: skip %s (no %s)\n", drivers[d].name, drivers[d].path); continue; } for (int i = 0; i < n; i++) { int got = run_driver(drivers[d].path, &rows[i], i); total++; if (got != rows[i].want) { fprintf(stderr, "arrlit_infer_elem[%s][%s]: exit=%d want=%d\n", drivers[d].name, rows[i].label, got, rows[i].want); fail++; } } } if (access(wdrv, X_OK) == 0) { for (int i = 0; i < n; i++) { total++; if (asm_byte_identical(bin, &rows[i], i) != 0) fail++; } } if (fail) { fprintf(stderr, "arrlit_infer_elem: %d/%d fixtures failed\n", fail, total); return 1; } printf("arrlit_infer_elem: %d/%d ok\n", total, total); return 0; }