[Bug middle-end/70561] Crash in recog_for_combine_1

[vogt at linux dot vnet.ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70561

--- Comment #1 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
P.S.:

(gdb) p debug_rtx(pat)
(set (reg:SI 67 [+4 ])
    (and:SI (not:SI (subreg:SI (reg/v:DI 65 [ b+-4 ]) 4))
        (mem:SI (plus:DI (reg:DI 2 %r2 [ a ])
                (const_int 4 [0x4])) [1 *a_2(D)+4 S4 A32])))
$13 = void
(gdb) p debug_rtx(newpat)
(parallel [
        (set (reg:SI 67 [+4 ])
            (and:SI (not:SI (subreg:SI (reg/v:DI 65 [ b+-4 ]) 4))
                (mem:SI (plus:DI (reg:DI 2 %r2 [ a ])
                        (const_int 4 [0x4])) [1 *a_2(D)+4 S4 A32])))
        (nil)
    ])
$14 = void