asinh() returns incorrect value with optimization turned on(fwd)

[Stephen L Moshier]

> The function asinh() returns incorrect values for negative numbers
> when optimization is turned on (level 1 or higher).

This is almost certainly a C library bug, not a compiler bug.
I remember reporting it and helping to fix it in an old version of the library.
The problem does not appear using libc-2.1.3 on linux.