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Commit 259b63d3 authored by Sebastian Graf's avatar Sebastian Graf Committed by Marge Bot
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Simplifier: Preserve OccInfo on DataAlt fields when case binder is dead (#24770) 

See the adjusted `Note [DataAlt occ info]`.
This change also has a positive repercussion on
`Note [Combine case alts: awkward corner]`.

Fixes #24770.

We now try not to call `dataConRepStrictness` in `adjustFieldsIdInfo` when all
fields are lazy anyway, leading to a 2% ghc/alloc decrease in T9675.

Metric Decrease:
    T9675
parent 9b4129a5
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