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Re: [PATCH] Don't reset cselib hash table during vt_initialize after every bb, only after every ebb

On Sat, Feb 27, 2010 at 02:15:32PM +0100, Steven Bosscher wrote:
> Looks to me like you should be using things like "find_edge (bb,
> bb->next_bb)" and "single_pred_p (bb->next_bb)" instead. Something
> like,
> 
> +      first_bb = bb;
> +      for (;;)
> +       {
> +         edge e;
> +         if (bb->next_bb == EXIT_BLOCK_PTR
> +            || ! single_pred_p (bb->next_bb))
> +           break;
> +         e = find_edge (bb, bb->next_bb);
> +         if (! e || (e->flags & EDGE_FALLTHRU) != 0)
> +           break;
> +         bb = bb->next_bb;
> +       }
> +      last_bb = bb;
> +
> 
> (Or at least something along these lines...)

Makes sense, will change it.  The code in the patch has been
copied from sched-ebb.c.

	Jakub
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