https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85925
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org,
| |segher at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r242946.
This is called when trying to simplify HImode lowpart subreg of
(zero_extract:SI (reg/v:SI 117 [ f ])
(const_int 15 [0xf])
(const_int 0 [0]))
and we return newly from that
(zero_extract:HI (subreg:HI (reg/v:SI 117 [ f ]) 0)
(const_int 15 [0xf])
(const_int 0 [0]))
which looks correct to me, so perhaps just a latent combiner or backend issue?
