CHECK: cc_plus_one_c_asm
CHECK:      lfence
CHECK:      lfence
CHECK:      lfence
CHECK:      lfence
CHECK:      lfence
CHECK-NEXT: incl
CHECK-NEXT: jmp
CHECK-NEXT: shlq    $0, (%rsp)
CHECK-NEXT: lfence
CHECK-NEXT: retq
CHECK:      popq
CHECK-NEXT: popq [[REGISTER:%[a-z]+]]
CHECK-NEXT: lfence
CHECK-NEXT: jmpq *[[REGISTER]]