[llvm-dev] PR43374 - when should comparing NaN values raise a floating point exception?

[Szabolcs Nagy via llvm-dev]

* Sanjay Patel <spatel at rotateright.com> [2019-10-08 08:07:10 -0400]:
> On Tue, Oct 8, 2019 at 7:08 AM Szabolcs Nagy <nsz at port70.net> wrote:
> > why is that ok?
> >
> 
> Because there are no FP exceptions/signals for this IR opcode:
> http://llvm.org/docs/LangRef.html#floating-point-environment

so llvm cannot support an iso c frontend on an ieee754 target?
(or fortran for that matter)