wcc: array static-init let/def DATA emit via SSoT helper (#129 A.3)
Extract emit_array_data + emit_array_lit_bytes helpers (both stages, mirrored) for module-level let/def with N_ARRLIT initializer or no-rhs zero-init. Two-pass validate-then-emit: validate pass walks elements and fails atomically on any non-foldable element (no partial-byte emit on failure); emit pass writes element bytes after success. Element-kind dispatch: integer via fold_int_literal byte-for-byte preserved from pre-A.3 inline arm (bootstrap NEUTRAL — 6 live consumers in lib/os/bufio/strings/encoding-utf8/strconv-stof_data), float via inline bitcast + sign-XOR byte-loop (A.1 shape, no INT64_MIN — sibling #144), struct via recursion into emit_struct_lit_bytes (A.2 helper). Out-of-scope element kinds (ptr-elem, nested-array) rule-7 fatal. emit_struct_lit_bytes gains TY_ARRAY field arm calling emit_array_lit_ bytes recursively — closes A.2 parked shape-15 (array-in-struct `def D: dt = dt{tag=42, buf=[1u8,2u8,3u8,4u8]};`). LOAD-side widened symmetric to A.2 precedent: cstage cgindex N_INDEX direct-ident isglobal gate widened via new DefArray registry (def_isarraydef populated in let_collect parallel to DefStruct); wwstage cgindex N_INDEX falls through to defvartnode on letvartnode nil (reads defent.dtnode field added in A.2). Both stages materialise array-def via LEAQ name(SB) same as array-let. Mid-impl rule-7 stop: refactor initially routed only rhs==N_ARRLIT through emitarraydata, leaving nil-rhs zero-init arrays (e.g. `let f64tos_buf: [64]u8;` in lib/strconv) silently SKIPPED → undef-ref at link of wwstage-rebuilt selfhost binaries. Caught on first gate run via bootstrap 994/995 RED. Fixed by adding nil-rhs branch to emitarraydata (zero-fills arrt.size bytes) + widening wwstage caller to route both N_ARRLIT and nil through helper. Same-class-lower-stratum pattern (recurring across A.1 N_UN-peel, A.2 sz==8-short-circuit, A.3 nil-rhs-drop); banked as feedback memory. Test 919 (11 rows: int-elem 1B/4B/8B + signed-N_UN-peel + float-elem f64/f32 + def-int / def-float / struct-with-array-field shape-15 + explicit-zero + single-elem-regression) registered. Make test: 182/182 incl. 990-997 byte-id + combined_ww_fresh. Followups filed: - #43 — wwstage emitletdataw str/slice-size arms lack !isarr guards; hypothetical no-rhs [16/24]u8 triple-emits (NOT A.3-introduced; no live consumer; 2-line parity fix)
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test/wcc/919_array_static_init_run.c
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260
test/wcc/919_array_static_init_run.c
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/*
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* 919_array_static_init_run — runtime + byte-id net for #129 Phase
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* A.3: module-level let/def with array initializer.
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*
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* Pre-A.3 state:
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* - Int-element arrays (u8/i8/u16/u32/u64/i32 etc) already worked
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* in both stages via fold_int_literal.
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* - Float-element arrays ([N]f64, [N]f32) → undef-ref at link
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* (emit_lets array arm fold_int_literal fails on FLOATLIT).
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* - Array DEFs (def A: [N]T = [...]) → emit_defs no array arm
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* (storage missing) AND cgindex broken (reads LEAQ (BP), BX —
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* stack frame, not data section).
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* - Array-in-struct field (`def D: dt = dt{tag=42, buf=[...]}`) →
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* #129 A.2 rule-7 fatal "array field rhs not foldable" — the
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* shape parked in A.2 awaiting A.3.
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*
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* Phase A.3 fix (mirror A.1/A.2 SSoT-helper precedent):
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* - cstage: emit_array_data + emit_array_lit_bytes helpers with
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* element-kind dispatch (int via fold_int_literal preserving
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* bootstrap byte-id, float via inline bitcast + sign-XOR byte-
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* loop mirror of A.1, struct via emit_struct_lit_bytes recursion
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* mirror of A.2). Two-pass validate-then-emit avoids partial-byte
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* corruption on rhs-fold-failure.
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* - cstage: emit_lets array arm routes through helper; emit_defs
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* gains array arm.
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* - cstage: DefArray registry + def_isarraydef populated in
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* let_collect; cgindex N_INDEX direct-ident `isglobal` gate
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* widened to (let_islet || def_isarraydef).
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* - cstage: emit_struct_lit_bytes (A.2 helper) gains TY_ARRAY field
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* arm calling emit_array_lit_bytes recursively (closes A.2 parked
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* shape 15).
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* - wwstage: parallel emitarraydata + emitarraylitbytes; emitstruct
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* litbytes TY_ARRAY arm; defvartnode helper; cgindex falls through
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* to defvartnode after letvartnode nil.
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*
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* Bootstrap RISK: live consumers in lib/os, lib/bufio, lib/strings,
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* lib/encoding/utf8 (dfa + masks), lib/strconv/stof_data
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* (left_shift_table). All use typed-int-literal elements; the int-elem
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* helper path is byte-for-byte preserved → bootstrap NEUTRAL.
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*
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* Rows (size strata 1B/2B/4B/8B × count strata 1/2/4 × int/float/struct/
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* empty/no-rhs/def-variant, avoiding the 16B-evade pattern from A.2):
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*
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* - (a) `let A: [4]u8 = [1u8, 2u8, 3u8, 4u8]` — 1B regression
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* - (b) `let A: [4]u32 = [1u32, 2u32, 3u32, 4u32]` — 4B regression
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* - (c) `let A: [2]u64 = [1u64, 2u64]` — 8B regression
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* - (d) `let A: [4]i32 = [-1, -2, -3, -4]` — N_UN peel regression
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* - (e) `let A: [4]f64 = [1.5, -2.5, 3.5, -4.5]` — NEW float-elem
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* - (f) `let A: [4]f32 = [1.5f32, -2.5f32, 3.5f32, -4.5f32]` — NEW
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* f32 narrow + sign-XOR per element
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* - (g) `def A: [4]u32 = [11u32, 22u32, 33u32, 44u32]` — NEW
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* def-storage + LOAD-widening
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* - (h) `def A: [4]f64 = [1.5, 2.5, 3.5, 4.5]` — NEW def-variant of
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* float
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* - (i) `def D: dt = dt{tag=42, buf=[1u8,2u8,3u8,4u8]}` — NEW
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* closes A.2 shape 15 (struct-with-array-field)
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* - (j) `let A: [4]u8 = [0u8, 0u8, 0u8, 0u8]` — explicit-zero
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* regression
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* - (k) `let A: [1]u8 = [0u8]` — single-elem (matches lib/os/
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* emptypath pattern)
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*
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* Each row: cstage `ww build` + run asserting exit code + w6c vs
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* w6c_ww `.s` cmp (rule-10 byte-id).
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*
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* Deferred:
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* - Pointer-element arrays `[N]*T = [&G, &H]` — needs DATAR per
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* element (own task/fold).
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* - Nested arrays `[N][M]T` — no current consumer.
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* - Bare-int `[N]u8 = [1, 2, 3, 4]` — #130 (checker issue).
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* - Partial init `[4]u8 = [1u8]` — checker rejects (parser/checker
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* decision).
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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static int
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runwait(const char *cmd)
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{
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int rc = system(cmd);
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if (rc == -1) return -1;
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if (WIFEXITED(rc)) return WEXITSTATUS(rc);
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return -1;
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}
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struct row { const char *label; const char *src; int want_exit; };
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static const struct row rows[] = {
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{ "let_u8_arr",
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"package main;\n"
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"let A: [4]u8 = [1u8, 2u8, 3u8, 4u8];\n"
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"export fn main() i32 = { return A[0]: i32; };\n", 1 },
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{ "let_u32_arr",
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"package main;\n"
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"let A: [4]u32 = [1u32, 2u32, 3u32, 4u32];\n"
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"export fn main() i32 = { return A[0]: i32; };\n", 1 },
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{ "let_u64_arr",
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"package main;\n"
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"let A: [2]u64 = [1u64, 2u64];\n"
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"export fn main() i32 = { return A[0]: i32; };\n", 1 },
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{ "let_i32_neg_arr",
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"package main;\n"
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"let A: [4]i32 = [-1, -2, -3, -4];\n"
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"export fn main() i32 = { return A[0]; };\n", 255 /* -1 */ },
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/* Float-element array — NEW in A.3. Includes both signs to exercise
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* the sign-XOR byte-loop per element. */
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{ "let_f64_arr",
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"package main;\n"
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"let A: [4]f64 = [1.5, -2.5, 3.5, -4.5];\n"
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"export fn main() i32 = { return (A[0]: i32); };\n", 1 },
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{ "let_f32_arr",
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"package main;\n"
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"let A: [4]f32 = [1.5f32, -2.5f32, 3.5f32, -4.5f32];\n"
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"export fn main() i32 = { return (A[0]: i32); };\n", 1 },
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/* def-variant exercises the LOAD-widening (def_isarraydef) at
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* cgindex/cgident. Storage emit also new. */
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{ "def_u32_arr",
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"package main;\n"
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"def A: [4]u32 = [11u32, 22u32, 33u32, 44u32];\n"
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"export fn main() i32 = { return A[0]: i32; };\n", 11 },
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{ "def_f64_arr",
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"package main;\n"
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"def A: [4]f64 = [1.5, 2.5, 3.5, 4.5];\n"
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"export fn main() i32 = { return (A[0]: i32); };\n", 1 },
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/* The A.2-parked shape-15 — closes via emit_struct_lit_bytes
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* TY_ARRAY field arm. */
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{ "let_struct_with_arr_field",
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"package main;\n"
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"type dt = struct { tag: i32, buf: [4]u8 };\n"
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"let D: dt = dt{tag=42, buf=[1u8, 2u8, 3u8, 4u8]};\n"
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"export fn main() i32 = { return D.tag; };\n", 42 },
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{ "let_u8_zero_arr",
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"package main;\n"
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"let A: [4]u8 = [0u8, 0u8, 0u8, 0u8];\n"
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"export fn main() i32 = { return A[0]: i32; };\n", 0 },
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{ "let_u8_single",
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"package main;\n"
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"let A: [1]u8 = [7u8];\n"
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"export fn main() i32 = { return A[0]: i32; };\n", 7 },
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{ NULL, NULL, 0 }
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};
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static int
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slurp_eq(const char *a, const char *b)
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{
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FILE *fa = fopen(a, "rb");
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FILE *fb = fopen(b, "rb");
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if (!fa || !fb) { if (fa) fclose(fa); if (fb) fclose(fb); return -1; }
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int rc = 0;
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for (;;) {
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int ca = fgetc(fa);
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int cb = fgetc(fb);
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if (ca != cb) { rc = -1; break; }
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if (ca == EOF) break;
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}
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fclose(fa); fclose(fb);
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return rc;
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}
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int
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main(void)
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{
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const char *bin = getenv("BIN");
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if (!bin) bin = "out/bin";
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char absbin[1024];
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if (bin[0] != '/') {
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char cwd[1024];
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if (getcwd(cwd, sizeof cwd) == NULL) return 1;
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snprintf(absbin, sizeof absbin, "%s/%s", cwd, bin);
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bin = absbin;
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}
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char w6c[1100], w6c_ww[1100];
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snprintf(w6c, sizeof w6c, "%s/w6c", bin);
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snprintf(w6c_ww, sizeof w6c_ww, "%s/w6c_ww", bin);
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if (access(w6c_ww, X_OK) != 0) {
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fprintf(stderr, "arrinit: w6c_ww missing — cannot run "
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"the cs==ww byte-id gate (the whole point of this test)\n");
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return 1;
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}
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int n = 0, fail = 0;
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for (int i = 0; rows[i].src; i++, n++) {
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char src[64];
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snprintf(src, sizeof src, "/tmp/wwari_%d_%d.ww", getpid(), i);
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FILE *f = fopen(src, "wb");
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if (f == NULL) { fail++; continue; }
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fputs(rows[i].src, f);
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fclose(f);
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char tmpdir[64];
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snprintf(tmpdir, sizeof tmpdir, "/tmp/wwari_%d_d_%d",
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getpid(), i);
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mkdir(tmpdir, 0755);
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char cmd[2048];
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snprintf(cmd, sizeof cmd, "cd %s && %s/ww build %s",
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tmpdir, bin, src);
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if (runwait(cmd) != 0) {
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fprintf(stderr, "row[%s]: cstage build failed\n",
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rows[i].label);
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fail++;
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unlink(src); rmdir(tmpdir);
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continue;
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}
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char outbin[128];
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const char *base = strrchr(src, '/');
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base = base ? base + 1 : src;
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snprintf(outbin, sizeof outbin, "%s/%s", tmpdir, base);
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char *dot = strrchr(outbin, '.');
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if (dot && strcmp(dot, ".ww") == 0) *dot = '\0';
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int got = runwait(outbin);
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if (got != rows[i].want_exit) {
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fprintf(stderr, "row[%s]: cstage exit %d, want %d\n",
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rows[i].label, got, rows[i].want_exit);
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fail++;
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}
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unlink(outbin); rmdir(tmpdir);
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char cs_s[64], ws_s[64];
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snprintf(cs_s, sizeof cs_s, "/tmp/wwari_%d_%d_cs.s",
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getpid(), i);
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snprintf(ws_s, sizeof ws_s, "/tmp/wwari_%d_%d_ww.s",
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getpid(), i);
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snprintf(cmd, sizeof cmd, "%s -o %s %s 2>/dev/null",
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w6c, cs_s, src);
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if (runwait(cmd) != 0) {
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fprintf(stderr, "row[%s]: w6c failed\n", rows[i].label);
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fail++; unlink(src); continue;
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}
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snprintf(cmd, sizeof cmd, "%s -o %s %s 2>/dev/null",
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w6c_ww, ws_s, src);
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if (runwait(cmd) != 0) {
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fprintf(stderr, "row[%s]: w6c_ww failed\n",
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rows[i].label);
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fail++; unlink(src); unlink(cs_s); continue;
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}
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if (slurp_eq(cs_s, ws_s) != 0) {
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fprintf(stderr,
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"row[%s]: cstage/wwstage .s DIFFER (rule-10 "
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"byte-id violation)\n", rows[i].label);
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fail++;
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}
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unlink(src); unlink(cs_s); unlink(ws_s);
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}
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if (fail) {
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fprintf(stderr, "%d/%d array-static-init tests failed\n", fail, n);
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return 1;
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}
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printf("arrinit: %d/%d ok (cstage run + cs==ww byte-id)\n",
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n, n);
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return 0;
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}
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