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Re: [RFC] third liveness pass


On Sun, May 26, 2002 at 02:21:47PM +0200, Jan Hubicka wrote:
> +       cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
> +       life_analysis (insns, rtl_dump_file, PROP_DEATH_NOTES
> + 		     | PROP_KILL_DEAD_CODE | PROP_SCAN_DEAD_CODE
> + 		     | PROP_EQUAL_NOTES);
> +       cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE | CLEANUP_PRE_LOOP
> + 		   | (flag_thread_jumps ? CLEANUP_THREADING : 0));
> +       if (flag_if_conversion)
> + 	if_convert (1);
> +       count_or_remove_death_notes (NULL, 1);
> +       reg_scan (insns, max_reg_num (), 1);
> +       close_dump_file (DFI_lifeearly, print_rtl_with_bb, insns);
> +     }
> + 
>     /* Perform global cse.  */

Hum.  Except for the call to if_convert, this might be exactly
what Roger needs for his gcse jump threading pass.  Not sure if
there are any transformations in gcse that would invalidate this
information...

Thoughts?



r~


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