[Bug rtl-optimization/82628] [8 Regression] wrong code at -Os on x86_64-linux-gnu in the 32-bit mode

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82628

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem seems to be in if_then_else_cond, which is called on
(plus:SI (ltu:SI (reg:SI 93)
        (subreg:SI (reg/v:DI 89 [ d ]) 0))
    (subreg:SI (reg/v:DI 89 [ d ]) 4))
and returns a bogus thing - return value (reg/v:DI 89 [ d ]) and
both false and true rtxes (const_int 0 [0]).