regrename: don't update REG_DEAD notes

Hans-Peter Nilsson
Thu Jun 16 15:40:00 GMT 2011

On Thu, 16 Jun 2011, Bernd Schmidt wrote:
> We're updating REG_DEAD notes in regrename.c, but it seems this is for
> historical reasons only. As far as I can tell, every pass that needs
> such notes recomputes them with df_note_add_problem/df_analyze, and the
> following patch bootstrapped and tested successfully on i686-linux (some
> random libmudflap failures mentioned previously), with the following
> change to ensure it's tested:
> +++ gcc/config/i386/i386.c	(working copy)

(Not a dbr target...)

> Ok?

NO!  They're still used by reorg.c+resource.c

brgds, H-P

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