From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
To: egcs@cygnus.com
Subject: Re: Some Haifa scheduler bugs
Date: Thu, 21 Aug 1997 15:47:18 -0000
Message-ID: <E0x1XyL-0000z8-00.1997-08-21-16-12-25_pgcc_forever_@cerebro>
In-reply-to: 4271.872008197@hurl.cygnus.com
X-SW-Source: 1997-08/0243.html
Message-ID: <19970821154718.0wLy7L4_9yx9v-TzioV75uc0mcVz0b0xVFFWqwmQVgU@z>

> Specific questions/comments:
> 
> In move_insn, is there some reason why you can't call reemit_notes
> during the loop on SCHED_GROUP_P insns?
> 
> ie, does this work instead?  Seems cleaner than using another loop
> if it works.
> 
> {
>   rtx new_last = insn;
> 
>   while (SCHED_GROUP_P (insn))
>     {
>       rtx prev = PREV_INSN (insn);
>       move_insn1 (insn, last);
>       reemit_notes (insn, insn);
>       insn = prev;
>     }
> 
>   move_insn1 (insn, last);
>   return reemit_notes (new_last, new_last);
> }

I've thought about something like this, but this code won't work, I think.
It will call reemit_notes twice for the last insn in the SCHED_GROUP and
not at all for the first one. I've tried thinking of ways to use just one
loop, but they all had problems with putting all notes in the right places.

Bernd