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Re: [PATCH]: Handle CONJ_EXPR in negate_expr_p and fold_negate_expr

Now, if we start with -~(x, 5) then first we fold that to -(x, -5) and leave it this way.

No, we won't because (x, 5) is not "negatable" (because 5 is negatable but 5 is not). I'm speaking of negate_expr, not fold_unary.

If we start with -~(5,x) we fold this to -(5,-x) (maybe questionable,
see fold_unary of CONJ_EXPR) and then to (-5,x).

Again, we won't do the initial folding in negate_expr.

Paolo

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