- Skip no-op splats of empty array literals (`*[]` / zarray) in
call argument generation and array literal codegen.
- Inline non-empty literal splat arrays without inner splats
(e.g. `*[a,b]`) as regular positional args/elements, avoiding
building a temporary array and ARYCAT.
This removes unnecessary `LOADNIL` + `ARRAY 0` + `ARYCAT` sequences
(e.g. `mruby -ve 'p *[]'`) and reduces temporary allocations while
preserving semantics and evaluation order. Falls back to the generic
path when nested splats are present or counts exceed fixed-arity.
No behavior change intended; only codegen improvements.
Co-authored-by: Codex <codex@openai.com>
Yukihiro "Matz" Matsumoto
1cb8d73ede