On 05/12/2018 10:02 AM, Richard Sandiford wrote: > "A. Skrobov" <tyomi...@gmail.com> writes: >>> If we look in sel-sched-ir.c we see that it calls into hash_rtx_cb >>> (sigh, bad modularity). I'm not at all familiar with how the hashing >>> is used within the selective scheduler, so I can't really say what the >>> selective scheduler *should* be doing here. >> >> OK, I see. Now what do you think would be the best course of action? >> Leave everything as it is? The selective scheduler may or may not want >> these memory accesses ignored. > > I don't think we can assert even for cse, since AIUI these codes can > still be used for stack pushes and pops. No. We're not supposed to have any auto-inc insns prior to the auto-inc pass. A stack push/pop early in the compiler would have to be represented by a PARALLEL.
It's been this way forever. It's documented in the internals manual somewhere. jeff
