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Re: Your predict.c patch
- From: Jan Hubicka <jh at suse dot cz>
- To: Jakub Jelinek <jakub at redhat dot com>
- Cc: jh at suse dot cz, gcc at gcc dot gnu dot org
- Date: Fri, 14 Dec 2001 19:25:15 +0100
- Subject: Re: Your predict.c patch
- References: <20011214121053.M4087@devserv.devel.redhat.com>
> Hi!
>
> Your
> Thu Dec 13 12:31:07 CET 2001 Jan Hubicka <jh@suse.cz>
>
> * predict.c (estimate_probability): Distribute the loop exit
> probability according to number of exit edges.
>
> patch broke a couple of testcases on ia32, particularly:
> FAIL: gcc.c-torture/compile/921202-1.c, -Os
> FAIL: gcc.c-torture/compile/950613-1.c, -O1
> FAIL: gcc.c-torture/compile/950613-1.c, -Os
>
> The problem is that if exits is 0, you divide by zero.
> Can you fix this?
I will try. Strange is that I do the computation only if I find exit,
so how can I divide by zero if there is no exits?
OK, I will investigate.
Honza
> Thanks.
>
> Jakub