On Wed, Nov 24, 2021 at 10:00:56AM +0100, Richard Biener via Gcc-patches wrote:
> On Mon, Nov 15, 2021 at 12:16 PM Richard Biener via Gcc-patches
> <gcc-patches@gcc.gnu.org> wrote:
> >
> > This avoids doing aforementioned canoncalization when -ftrapping-math
> > is in effect and we honor NaNs.
> >
> > Bootstrapped and tested on x86_64-unknown-linux-gnu.
> >
> > OK?
>
> Ping.
>
> >
> > Thanks,
> > Richard.
> >
> > 2021-11-15 Richard Biener <rguent...@suse.de>
> >
> > PR middle-end/103193
> > * match.pd: Avoid canonicalizing (le/ge @0 @0) to (eq @0 @0)
> > with NaNs and -ftrapping-math.
Ok, thanks.
> > gcc/match.pd | 5 ++++-
> > 1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/gcc/match.pd b/gcc/match.pd
> > index a319aefa808..a7f1e56fe2f 100644
> > --- a/gcc/match.pd
> > +++ b/gcc/match.pd
> > @@ -4629,7 +4629,10 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
> > (if (! FLOAT_TYPE_P (TREE_TYPE (@0))
> > || ! HONOR_NANS (@0))
> > { constant_boolean_node (true, type); }
> > - (if (cmp != EQ_EXPR)
> > + (if (cmp != EQ_EXPR
> > + /* With -ftrapping-math conversion to EQ loses an exception. */
> > + && (! FLOAT_TYPE_P (TREE_TYPE (@0))
> > + || ! flag_trapping_math))
> > (eq @0 @0)))))
> > (for cmp (ne gt lt)
> > (simplify
> > --
> > 2.31.1
Jakub
