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Re: RFA: Revamp fortran array types

Hi,

On Tue, 18 Aug 2009, Michael Matz wrote:

> where T1 and T2 are really the same type but with different alias sets 
> (in this case it's both a variant of real(kind=8)).  Unfortunately the 
> need for different alias sets means that the two types can't be really 
> variants of each other, hence conversions between them are not useless, 
> hence they aren't stripped away.  Of course they preserve values just 
> fine, so in reality the conversion _can_ be stripped in such contexts.  
> Hmm.

Okay, after some pondering we decided that the vectorizer should be fixed 
to not rely on TYPE_MAIN_VARIANT to establish type similarity but rather 
some variant of useless_type_conversion_p.  I'd rather do this in a 
followup to not clutter the current patch even more, though.


Ciao,
Michael.
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