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Re: rfc: auto-casted vector types
>>>>> "Geoff" == Geoff Keating <geoffk@geoffk.org> writes:
> Jim Wilson <wilson@redhat.com> writes:
>> It might be useful to note in the comments in the rs6000 file that the
>> current implementation has a known flaw. It pretends that V2SI is the opaque
>> vector type. This means that it accidentally allows conversions to/from the
>> V2SI vector type without explicit casts. In order to fix this, we need to
>> use a different otherwise unused vector type for the opaque vector type.
>> Nick started on a patch to do this, but didn't have enough time to finish it.
> This shouldn't be done at the RTL level at all; the right thing to do
> is to create a special '__ev64_opaque__' type which is different from
> 'vector int' and just happens to also have V2SImode (or DImode or
> whatever is convenient---I'd vote for DImode since that's what GCC
> uses for all-purpose "blob of data" types).
Actually, I agree with this because I just ran into a similar problem
this morning with an upcoming patch that I solved by looking at the
type instead.
I'll put it on my TODO list.
Aldy