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