https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69195
--- Comment #13 from Alan Modra <amodra at gmail dot com> --- Created attachment 37862 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37862&action=edit delete bad reg_equiv A patch like this one that deletes reg_equiv notes that become invalid according to validate_equiv_mem after delete_trivially_dead_insns, results in code requiring more non-volatile regs than simply running delete_trivially_dead insns early. The notes created in the second pass of update_equiv_regs (that I thought invalid) are used by reload to move stores up.
