dibrinsofor eaa3ef9ddc
[DAG] Propagate OrZero and DemandedElts for min/max in isKnownToBeAPowerOfTwo (#182369)
Fixes #181643 

For queries like `isKnownToBeAPowerOfTwo(V, OrZero=true)`, if an operand
is known to be "pow2-or-zero" but not strictly non-zero power-of-two,
the min/max case currently returns false even when the result remains
pow2-or-zero.

For instance:
- `A = select cond, 4, 0`  (A is pow2-or-zero)
- `R = umin(A, 16)`

`R` is always in `{0, 4}` and querying `isKnownToBeAPowerOfTwo(R,
OrZero=true)` should be true.

Added unitests for baseline and failing case and now propagating
correctly to `OrZero` and `DemandedElts`
2026-04-02 12:50:11 +01:00

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