maxval on -inf and nan in Fortran

[Segher Boessenkool]

On Thu, Feb 27, 2020 at 09:25:27PM -0800, Steve Kargl wrote:
> On Fri, Feb 28, 2020 at 01:02:28PM +0800, Jiufu Guo wrote:
> > 
> > With -ffast-math -O3, this case `STOP 3` on a few platforms, e.g. ppc64le/x86.
> 
> IMHO, using -ffast-math with Fortran code is never correct.
> With this option, you got exactly what you wanted.

It happens with -O2 already.

The frontend generates a MIN_EXPR (or MAX_EXPR) for this, which is
undefined for NaNs already.  I think the testcase is just invalid?


Segher