https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93738
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #23)
> Hi!
>
> On Wed, Jan 14, 2026 at 12:23:37PM +0000, cvs-commit at gcc dot gnu.org
> wrote:
> > Thus, I think we need to limit to non-paradoxical SUBREGs.
>
> Why does subreg_lowpart_p ever allow paradoxical subregs? Those by
> definition are never a low part!
>
> Should we not just fix that, instead?
I'm afraid such a change is too risky for stage4, for stage1, why not.
GCC has behaved that way since forever, certainly e.g. 3.2 has that in, and I'm
pretty sure at least some of the > 80 callers will rely on the current
behavior.
