[llvm-commits] [llvm] r49458 - /llvm/trunk/lib/Transforms/IPO/SimplifyLibCalls.cpp

[Chris Lattner]

On Apr 10, 2008, at 4:25 AM, Duncan Sands wrote:
>>>> +      // x    pow(x, 0.5)  sqrt(x)
>>>> +      // ---------------------------------------------
>>>> +      // -0.0    +0.0       -0.0
>>>> +      // -inf    +inf       NaN
>>>
>>> looks like pow is broken.  Is pow's behaviour documented
>>> anywhere?  On my machine the man page says:
>>>
>>>       The pow() function can return the following error:
>>>
>>>       EDOM   The  argument x is negative and y is not an integral
>>> value.  This would result in a complex num‐
>>>              ber.
>>>

-0.0 is negative, but it *is* an integral value, so EDOM doesn't apply.

-Chris