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Re: Calling life_analysis from other optimizers (i.e. VRP)
- To: John Wehle <john at feith dot com>
- Subject: Re: Calling life_analysis from other optimizers (i.e. VRP)
- From: Jeffrey A Law <law at cygnus dot com>
- Date: Wed, 21 Jun 2000 10:57:43 -0600
- cc: gcc at gcc dot gnu dot org
- Reply-To: law at cygnus dot com
In message <200006190519.BAA08831@jwlab.FEITH.COM>you write:
> It would be nice if VRP could use global_live_at_start to determine
> if it should bother propagating value range information for a given
> register. This would (among other things) cut down on the amount
> of memory used by VRP. Any problem with VRP calling:
>
> life_analysis (get_insns (), NULL, PROP_KILL_DEAD_CODE | PROP_SCAN_DEAD_C
> ODE);
>
> before starting its main loop? Any other thoughts / suggestions?
Probably reasonable given that VRP is likely going to be somewhat expensive.
jeff