[PATCH] Simplify (X ^ signbit) + C

[David Majnemer]

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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