[llvm-commits] [llvm] r75308 - in /llvm/trunk: include/llvm/CodeGen/ValueTypes.h include/llvm/CodeGen/ValueTypes.td lib/VMCore/ValueTypes.cpp utils/TableGen/CodeGenTarget.cpp

[Evan Cheng]

My current plan is to model with as intrinsics that produce multiple  
scalar values. We should simply pre-register allocate them isel time.

Evan

On Jul 12, 2009, at 5:28 PM, Chris Lattner wrote:

>
> On Jul 12, 2009, at 4:53 PM, Bob Wilson wrote:
>
>>>
>>> Right, just don't declare the regpair regclass as "legal" at isel
>>> lowering time.
>>
>> I could definitely go that route, i.e., define one MVT for the new
>> Neon regclasses instead of adding all these new vector types.  I  
>> don't
>> think it would make much difference either way in terms of getting
>> Neon to work.
>>
>> (I had mentioned in an email yesterday that an alternative to the new
>> types would be defining a separate intrinsic for each type.  I
>> realized later that would be silly.  We could just use arguments to
>> the intrinsics to specify the element size and vector length.)
>>
>> It sounds like you would prefer to avoid adding all the new vector
>> types.  Is that right?
>
> Yes, I'd prefer to avoid adding all the types.  It doesn't feel
> "right".  After talking with Evan about it, please find a different
> approach to solve the problem.  Thanks Bob!
>
> -Chris
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