[Bug target/88856] [8/9 Regression] gfortran producing wrong code with -funroll-loops

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88856

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I admit I have just a vague recollection of this, but I thought since df has
been added, usually if a pass wants REG_DEAD notes, it needs to
df_note_add_problem () and df_analyze should rebuild the REG_DEAD/REG_UNUSED
notes.