Hojun-Cho
58e6d349a2
Per CLAUDE.md rule 10, align cstage down to wwstage — when every variant in a `?` propagation maps to itself, the remap loop emits zero JMPs and the propret label is dead. Lazy-allocate it so the label-counter ID is only consumed when at least one JMP fires. Smoke test selfhost/test/trypromote.ww exercises same-shape (i64|nomem)→(i64|nomem) propagation; cstage and wwstage now emit byte-identical asm for the TRYPROP region.
55 lines
1.4 KiB
Plaintext
55 lines
1.4 KiB
Plaintext
// selfhost/test/trypromote.ww — smoke for `?` propagation through a
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// `!void`-shaped alias.
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//
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// Task #2 (ww-strings-redesign): proves cgen's TRYPROP tag-remap works
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// for the exact pattern lib/errors + os.alloc are about to lean on. We
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// cannot smoke this against lib/ today because there are zero lib-side
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// `?` users on a `!void` alias yet. Mirrors the shlex.syntaxerr shape
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// (lib/shlex/shlex.ww:112) for the "nomem" stub.
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//
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// Not table-driven on purpose: same-shape `?` is a single cgen emit
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// pattern, so varying the operand exercises the same asm. The two
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// match arms below cover both runtime outcomes (success unwrap, error
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// propagation); asm-level regressions of task #18 are gated by the
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// byte-identity tests (994_w6c_ww, 995_self_rebuild).
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package test;
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import fmt;
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type nomem = !void;
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fn stub(fail: i64) (i64 | nomem) = {
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if (fail != 0i64) { let e: nomem; return e; };
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return 42i64;
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};
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fn caller(fail: i64) (i64 | nomem) = {
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let v = stub(fail)?;
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return v + 1i64;
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};
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export fn main() i32 = {
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let rc: i32 = 0;
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match (caller(0i64)) {
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case let n: i64 => {
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fmt.println("ok ", n);
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if (n != 43i64) { rc = 1; };
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};
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case nomem => {
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fmt.println("unexpected nomem on ok path");
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rc = 2;
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};
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};
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match (caller(1i64)) {
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case let n: i64 => {
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fmt.println("unexpected ", n, " on err path");
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rc = 3;
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};
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case nomem => {
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fmt.println("nomem as expected");
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};
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};
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return rc;
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};
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