luxufan f44c7dec67 [Local] Use most generic range if K does not dominate J or K doesn't have a !noundef ...

Since D141386 has changed the return value of !range from IUB to poison,
metadata !range shouldn't be preserved even if K dominates J.

If this patch was accepted, I plan to adjust metadata !nonnull as well.
BTW, I found that metadata !noundef is not handled in combineMetadata,
is this intentional?

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D142687

2023-03-23 19:31:55 +08:00

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