Florian Hahn b0b88643a1 [VPlan] Add initial anlysis to infer scalar type of VPValues. (#69013) ...

This patch adds initial type inferrence for VPValues. It infers the
scalar type of a VPValue, by bottom-up traversing through defining
recipes until root nodes with known types are reached (e.g. live-ins or
load recipes). The types are then propagated top down through
operations.

This is intended as building block for a VPlan-based cost model, which
will need access to type information for VPValues/recipes.

Initial testing is done by asserting the inferred type matches the type
of the result value generated for a widen and replicate recipes.

2023-10-27 14:38:28 +01:00

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