[RFC] Check number of uses in simplify_cond_using_ranges().
Eric Botcazou
ebotcazou@adacore.com
Thu Nov 3 15:29:00 GMT 2016
> Is VRP the right pass to do this optimisation or should a later
> pass rather attempt to eliminate the new use of b_5 instead? Uli
> has brought up the idea a mini "sign extend elimination" pass that
> checks if the result of a sign extend could be replaced by the
> original quantity in all places, and if so, eliminate the ssa
> name.
Did you try to enable -free on s390x? It's a RTL pass.
--
Eric Botcazou
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