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Re: [PATCH] Fix 14844/15459/21608: Forward-propagate casts that will collapse


On Tue, May 24, 2005 at 02:53:36PM -0600, Jeffrey A Law wrote:
> >  Forwprop is not the place for this optimization.
> I'm less sure about this.  Ultimately everything in forwprop.c is
> just tree combination (run forward rather than reverse).  At least
> some cases of NOP_EXPR removal clearly fall under the category of
> tree combination.

I was thinking that this was copy-prop with some extra checks
at the substitution point.


r~


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