[Bug tree-optimization/127039] [17 Regression] forwprop never terminates on a reduction pair against a vector constant (RVV, SVE)

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127039

--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Kyrylo Tkachov <ktkachov@gcc.gnu.org>:

https://gcc.gnu.org/g:b74153cc071f4bbedb76f2b72800b2c9467ce996

commit r17-3820-gb74153cc071f4bbedb76f2b72800b2c9467ce996
Author: Kyrylo Tkachov <ktkachov@nvidia.com>
Date:   Fri Aug 28 17:38:57 2026 +0200

    fold-const-call: Explain singleton sNaN handling [PR127039]

    Explain why singleton sNaN encodings use the exact element-count fallback.

    gcc/ChangeLog:

            PR tree-optimization/127039
            * fold-const-call.cc (fold_const_reduction): Explain the handling
of
            singleton sNaN encodings.

    Signed-off-by: Kyrylo Tkachov <ktkachov@nvidia.com>