[PATCH] Fix up norm2 simplification (PR middle-end/88074)

[Thomas Koenig]

Hi Steve,

> On Sat, Feb 16, 2019 at 05:23:58PM +0100, Thomas Koenig wrote:
>>
>> Also, we seem to have a lot of issues with IEEE flags
>> when calculating NORM2, this would also need to be
>> addressed.
>>
> 
> Which IEEE flags and are you referring using the
> Fortran modules or -ffpe-trap?

I checked out the software from that paper (thanks for the link), and
gfortran ran up quite a lot of errors running the test suite even with
the author's preferred version.  That's what I meant.

Regards

	Thomas