https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92460
avieira at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-11-11
Ever confirmed|0 |1
--- Comment #1 from avieira at gcc dot gnu.org ---
The ICE seems to be because vectorizable_simd_clone_call is inserting values
and phi-nodes on the epilogue's preheader edge which uses a value defined in
the main loop's preheader edge (created by the main loop's call to
vectorizable_simd_clone_call). However this definition does not dominate the
use, as the main loop may have been skipped.
Not entirely sure what the best action is here, I didn't get enough time to
figure out what these values represent. I suspect this is not because of my
changes though, but it was a latent issue that now shows up because I turned on
epilogue vectorization.
