Noah Goldstein 88bd507dc2 [X86] Handle shifts + and in LowerSELECTWithCmpZero ...

shifts are the same as sub where rhs == 0 is identity.
and is the inverted case where:
    `SELECT (AND(X,1) == 0), (AND Y, Z), Y`
        -> `(AND Y, (OR NEG(AND(X, 1)), Z))`
With -1 as the identity.

Closes #107910

2024-09-09 16:19:26 -07:00

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