The compiler, configured with --enable-checking=yes,rtl,extra ICEs with:

internal compiler error: RTL check: expected elt 0 type 'e' or 'u',
have 'E' (rtx unspec) in try_combine, at combine.cc:3237

This is

3236              /* Just replace the CC reg with a new mode.  */
3237              SUBST (XEXP (*cc_use_loc, 0), newpat_dest);
3238              undobuf.other_insn = cc_use_insn;

in combine.cc, where *cc_use_loc is

(unspec:DI [
        (reg:CC 17 flags)
    ] UNSPEC_PUSHFL)

combine assumes CC must be used inside of a comparison and uses XEXP (..., 0)
without checking on the RTX type of the argument.

Skip the modification of CC-using operation if *cc_use_loc is not COMPARISON_P.

    PR middle-end/112560

gcc/ChangeLog:

    * combine.cc (try_combine): Skip the modification of CC-using
    operation if *cc_use_loc is not COMPARISON_P.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

OK for master?

Uros.