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Re: [4.5] Better support for widening multiplies
>> Both Paolo and myself have versions of the patch which utilize
>> fwprop infrastructure. IMO there's no point in rewriting the whole
>> thing to fit into a different framework.
>
> If it's the right thing in the wrong place, then IMO there is always a
> point to try and fit it in the right place. Doing the right thing in
> the wrong place is how things like regmove and reload came to be.
I agree with both of you. SEE is a potentially very useful pass, if
this work can help bringing it back into shape and maybe enabling it
at -O3 it's all for the better. If there is already something that
"works", well this can actually stimulate to develop a "competiting"
implementation and having something to base a comparison on.
Paolo