Add reduce-ir-children; rebuild the read-only IR walks on it

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map-ir-children single-sourced the child layout for rewrite passes; the read-only
analyses each re-enumerated ops by hand. Add a fold companion, reduce-ir-children,
and rebuild body-size, pure?, and body-closed? on it (each reduces to a leaf value
+ the special ops it actually needs). local-escapes? stays an explicit walk — its
default is conservatively true and it inspects node shape beyond child purity, so
folding an unhandled op over its children would be unsound for scalar replacement.

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Yogthos 2026-06-23 01:28:32 -04:00

parent adf00a3b51

commit 524d4cd8d1

3 changed files with 247 additions and 241 deletions

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