Files
sx/examples
agra 28b18f812a fix(issue-0057): all-diverging match arms no longer fail LLVM verification
A match (`if subject == { case ... }`) whose arms all diverge (each
`return`s / `raise`s) failed LLVM verification with a `void` phi plus
"Terminator found in the middle of a basic block". Two causes in lowerMatch:

- The value-arm path did `lowerBlockValue(arm.body) orelse constInt(0, …)`,
  emitting the fallback `const` into a block the body had ALREADY terminated
  (a diverging arm), so `currentBlockHasTerminator()` then saw the const (not
  the `ret`) and emitted a `br merge` after the terminator. Fix: materialize
  the fallback value + branch only when the block hasn't terminated.
- A fully-diverging match infers `result_type == .noreturn` yet still built a
  value-merge phi. Fix: `has_value_merge` excludes `.noreturn`, so such a
  match builds no phi; its arms terminate and the merge block is unreachable.

Also: inferMatchResultType now skips `.noreturn` arms (a diverging arm doesn't
decide the result type) and reports `.noreturn` only when EVERY arm diverges —
so a mixed match (some arms yield values, some diverge) infers the value type.

This unblocks ERR E1.5's `catch` match-body form (`x catch e == { case .A:
return …; else: raise e; }`), which desugars to an all-diverging match.

Regression: examples/225-match-diverging-arms.sx (all-diverging + mixed,
exit 134). Gates: zig build, zig build test, 263/263 examples.
2026-05-31 21:04:06 +03:00
..
2026-03-06 10:46:28 +02:00
2026-02-09 18:07:41 +02:00
2026-02-09 18:07:41 +02:00
2026-02-14 13:17:22 +02:00
2026-02-09 18:07:41 +02:00
2026-02-09 18:07:41 +02:00
2026-02-09 18:07:41 +02:00
2026-02-09 18:07:41 +02:00
2026-02-09 18:07:41 +02:00
2026-02-24 15:10:02 +02:00
2026-02-24 17:37:52 +02:00
2026-02-11 14:22:25 +02:00
2026-02-09 18:07:41 +02:00
2026-02-24 17:37:52 +02:00
2026-02-14 13:17:22 +02:00
2026-02-09 18:07:41 +02:00
...
2026-02-11 13:03:04 +02:00
2026-02-14 14:52:39 +02:00
2026-02-24 17:37:52 +02:00
2026-02-16 01:13:34 +02:00
2026-02-24 06:20:38 +02:00
2026-02-11 01:05:21 +02:00
2026-02-22 22:16:30 +02:00
2026-02-11 20:41:43 +02:00
ir
2026-02-26 02:25:02 +02:00
2026-02-12 12:27:35 +02:00
2026-02-14 13:17:22 +02:00
2026-02-14 14:52:39 +02:00
2026-02-22 22:16:30 +02:00
2026-02-22 17:24:04 +02:00
2026-02-22 17:24:04 +02:00
2026-02-22 17:24:04 +02:00
2026-02-24 17:37:52 +02:00
2026-02-25 15:51:22 +02:00
sm
2026-03-02 21:00:55 +02:00
2026-03-04 17:12:56 +02:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00
2026-05-17 13:19:08 +03:00