[PATCH] Simplify (X ^ signbit) + C

[Rafael Espíndola]

LGTM

On 6 May 2013 16:15, David Majnemer <david.majnemer at gmail.com> wrote:
> Cases like (X - (1 << 31)) + C or (X ^ (1 << 31)) + C do not get constant
> folding.
>
> The attached patch reassociates the instruction operands so that we get:
> (X - ((1 << 31) - C)).
>
> --
> David Majnemer
>
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