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Re: [RFC] Contributing tree-ssa to mainline

Daniel Berlin wrote:

> As Diego stated when SRA was committed, the following limitation exists:
> /* Maximum number of fields that a structure should have to be 
> scalarized.
>    FIXME  This limit has been arbitrarily set to 5.  Experiment to find 
> a
>     sensible setting.  */
> #define MAX_NFIELDS_FOR_SRA 5
> 
> This was done, IIRC, to avoid severely increased register pressure.
> 
> If you want SRA to do something on your structure, you'll need to 
> increase that limit

If I go down to two fields/tuples of length two, the optimization
doesn't kick in, either.  8-(
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