[Bug tree-optimization/69170] [6 Regression] ICE (segfault) in find_uses_to_rename_use

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69170

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems during SLP vect_get_constant_vectors is called here with op which is
SSA_NAME set in a pattern sequence (created during
vect_recog_vector_vector_shift_pattern).  When the sequences are killed, the
SSA_NAME is put on a freelist, but the uses remain.  Richard, can you please
have a look at this?