Formatting -0.0 as 0.0

[Steven Schveighoffer]

On 10/15/21 6:26 PM, Elronnd wrote:
> On Friday, 15 October 2021 at 14:09:32 UTC, Steven Schveighoffer wrote:
>> Note that if ldc is optimizing out an addition with 0, and that 
>> actually changes the observable results, that technically is an 
>> invalid optimization.
> 
> I disagree.  With -ffast-math you're explicitly saying 'please feel free 
> to make changes to expressions involving floating-point numbers which 
> maintain all observable results only under the assumption that 
> floating-point numbers have properties that they actually don't'.

Yeah you are probably right. I didn't realize that was a special 
optimization flag.

-Steve